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Message-Id: <1298522550-7332-1-git-send-email-kheitke@codeaurora.org>
Date: Wed, 23 Feb 2011 21:42:27 -0700
From: Kenneth Heitke <kheitke@...eaurora.org>
To: davidb@...eaurora.org, amirs@...eaurora.org
Cc: linux-arm-msm@...r.kernel.org,
Kenneth Heitke <kheitke@...eaurora.org>,
linux-arm-kernel@...ts.infradead.org (open list:ARM PORT),
linux-kernel@...r.kernel.org (open list)
Subject: [RFC PATCH] msm: sps: Smart Peripheral System (SPS) driver.
From: Amir Samuelov <amirs@...eaurora.org>
The driver controls the SPS hardware DMA to move data in the following
modes:
1. Peripheral-to-Peripheral
2. Peripheral-to-Memory
3. Memory-to-Memory
This driver complies to BAM hardware version#2.
Signed-off-by: Amir Samuelov <amirs@...eaurora.org>
Signed-off-by: Kenneth Heitke <kheitke@...eaurora.org>
---
This patch is being submitted as RFC to get early feedback from the
community.
arch/arm/mach-msm/Kconfig | 23 +
arch/arm/mach-msm/Makefile | 1 +
arch/arm/mach-msm/include/mach/msm_sps.h | 25 +
arch/arm/mach-msm/include/mach/sps.h | 1105 ++++++++++++++++++
arch/arm/mach-msm/sps/Makefile | 2 +
arch/arm/mach-msm/sps/bam.c | 588 ++++++++++
arch/arm/mach-msm/sps/bam.h | 375 ++++++
arch/arm/mach-msm/sps/sps.c | 1359 ++++++++++++++++++++++
arch/arm/mach-msm/sps/sps_bam.c | 1820 ++++++++++++++++++++++++++++++
arch/arm/mach-msm/sps/sps_bam.h | 547 +++++++++
arch/arm/mach-msm/sps/sps_core.h | 107 ++
arch/arm/mach-msm/sps/sps_dma.c | 896 +++++++++++++++
arch/arm/mach-msm/sps/sps_map.c | 137 +++
arch/arm/mach-msm/sps/sps_map.h | 46 +
arch/arm/mach-msm/sps/sps_mem.c | 156 +++
arch/arm/mach-msm/sps/sps_rm.c | 806 +++++++++++++
arch/arm/mach-msm/sps/spsi.h | 284 +++++
17 files changed, 8277 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-msm/include/mach/msm_sps.h
create mode 100644 arch/arm/mach-msm/include/mach/sps.h
create mode 100644 arch/arm/mach-msm/sps/Makefile
create mode 100644 arch/arm/mach-msm/sps/bam.c
create mode 100644 arch/arm/mach-msm/sps/bam.h
create mode 100644 arch/arm/mach-msm/sps/sps.c
create mode 100644 arch/arm/mach-msm/sps/sps_bam.c
create mode 100644 arch/arm/mach-msm/sps/sps_bam.h
create mode 100644 arch/arm/mach-msm/sps/sps_core.h
create mode 100644 arch/arm/mach-msm/sps/sps_dma.c
create mode 100644 arch/arm/mach-msm/sps/sps_map.c
create mode 100644 arch/arm/mach-msm/sps/sps_map.h
create mode 100644 arch/arm/mach-msm/sps/sps_mem.c
create mode 100644 arch/arm/mach-msm/sps/sps_rm.c
create mode 100644 arch/arm/mach-msm/sps/spsi.h
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 997c5bd..0ca8720 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -210,4 +210,27 @@ config IOMMU_API
config MSM_SCM
bool
+
+config SPS
+ bool "SPS support"
+ depends on (HAS_IOMEM && ARCH_MSM8960)
+ select GENERIC_ALLOCATOR
+ default n
+ help
+ The SPS (Smart Peripheral Switch) is a DMA engine.
+ It can move data in the following modes:
+ 1. Peripheral-to-Peripheral.
+ 2. Peripheral-to-Memory.
+ 3. Memory-to-Memory.
+
+config SPS_SUPPORT_BAMDMA
+ bool "SPS support BAM DMA"
+ depends on SPS
+ default n
+ help
+ The BAM-DMA is used for Memory-to-Memory transfers.
+ The main use cases is RPC between processors.
+ The BAM-DMA hardware has 2 registers sets:
+ 1. A BAM HW like all the peripherals.
+ 2. A DMA channel configuration (i.e. channel priority).
endif
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
index 2099c97..28553ac 100644
--- a/arch/arm/mach-msm/Makefile
+++ b/arch/arm/mach-msm/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_MSM_SCM) += scm.o scm-boot.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
+obj-$(CONFIG_SPS) += sps/
obj-$(CONFIG_MACH_TROUT) += board-trout.o board-trout-gpio.o board-trout-mmc.o devices-msm7x00.o
obj-$(CONFIG_MACH_TROUT) += board-trout.o board-trout-gpio.o board-trout-mmc.o board-trout-panel.o devices-msm7x00.o
diff --git a/arch/arm/mach-msm/include/mach/msm_sps.h b/arch/arm/mach-msm/include/mach/msm_sps.h
new file mode 100644
index 0000000..3af6f71
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/msm_sps.h
@@ -0,0 +1,25 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef _MSM_SPS_H_
+#define _MSM_SPS_H_
+
+/**
+ * struct msm_sps_platform_data - SPS Platform specific data.
+ * @bamdma_restricted_pipes - Bitmask of pipes restricted from local use.
+ *
+ */
+struct msm_sps_platform_data {
+ u32 bamdma_restricted_pipes;
+};
+
+#endif /* _MSM_SPS_H_ */
+
diff --git a/arch/arm/mach-msm/include/mach/sps.h b/arch/arm/mach-msm/include/mach/sps.h
new file mode 100644
index 0000000..f4819d9
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/sps.h
@@ -0,0 +1,1105 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Smart-Peripheral-Switch (SPS) API. */
+
+#ifndef _SPS_H_
+#define _SPS_H_
+
+#include <linux/types.h> /* u32 */
+
+/* SPS device handle indicating use of system memory */
+#define SPS_DEV_HANDLE_MEM ((u32)0x7ffffffful)
+
+/* SPS device handle indicating use of BAM-DMA */
+
+/* SPS device handle invalid value */
+#define SPS_DEV_HANDLE_INVALID ((u32)0)
+
+/* BAM invalid IRQ value */
+#define SPS_IRQ_INVALID 0
+
+/* Invalid address value */
+#define SPS_ADDR_INVALID 0
+
+/* Invalid peripheral device enumeration class */
+#define SPS_CLASS_INVALID ((u32)-1)
+
+/*
+ * This value specifies different configurations for an SPS connection.
+ * A non-default value instructs the SPS driver to search for the configuration
+ * in the fixed connection mapping table.
+ */
+#define SPS_CONFIG_DEFAULT 0
+
+/*
+ * This value instructs the SPS driver to use the default BAM-DMA channel
+ * threshold
+ */
+#define SPS_DMA_THRESHOLD_DEFAULT 0
+
+/* Flag bits supported by SPS hardware for struct sps_iovec */
+#define SPS_IOVEC_FLAG_INT 0x8000 /* Generate interrupt */
+#define SPS_IOVEC_FLAG_EOT 0x4000 /* Generate end-of-transfer indication */
+#define SPS_IOVEC_FLAG_EOB 0x2000 /* Generate end-of-block indication */
+#define SPS_IOVEC_FLAG_NO_SUBMIT 0x0100 /* Do not submit descriptor to HW */
+#define SPS_IOVEC_FLAG_DEFAULT 0x0001 /* Use driver default */
+
+/* BAM device options flags */
+
+/*
+ * BAM will be configured and enabled at boot. Otherwise, BAM will be
+ * configured and enabled when first pipe connect occurs.
+ */
+#define SPS_BAM_OPT_ENABLE_AT_BOOT 1UL
+/* BAM IRQ is disabled */
+#define SPS_BAM_OPT_IRQ_DISABLED (1UL << 1)
+/* BAM peripheral is a BAM-DMA */
+#define SPS_BAM_OPT_BAMDMA (1UL << 2)
+
+/* BAM device management flags */
+
+/* BAM global device control is managed remotely */
+#define SPS_BAM_MGR_DEVICE_REMOTE 1UL
+/* BAM device supports multiple execution environments */
+#define SPS_BAM_MGR_MULTI_EE (1UL << 1)
+/* BAM pipes are *not* allocated locally */
+#define SPS_BAM_MGR_PIPE_NO_ALLOC (1UL << 2)
+/* BAM pipes are *not* configured locally */
+#define SPS_BAM_MGR_PIPE_NO_CONFIG (1UL << 3)
+/* BAM pipes are *not* controlled locally */
+#define SPS_BAM_MGR_PIPE_NO_CTRL (1UL << 4)
+/* "Globbed" management properties */
+#define SPS_BAM_MGR_NONE \
+ (SPS_BAM_MGR_DEVICE_REMOTE | SPS_BAM_MGR_PIPE_NO_ALLOC | \
+ SPS_BAM_MGR_PIPE_NO_CONFIG | SPS_BAM_MGR_PIPE_NO_CTRL)
+#define SPS_BAM_MGR_LOCAL 0
+#define SPS_BAM_MGR_LOCAL_SHARED SPS_BAM_MGR_MULTI_EE
+#define SPS_BAM_MGR_REMOTE_SHARED \
+ (SPS_BAM_MGR_DEVICE_REMOTE | SPS_BAM_MGR_MULTI_EE | \
+ SPS_BAM_MGR_PIPE_NO_ALLOC)
+#define SPS_BAM_MGR_ACCESS_MASK SPS_BAM_MGR_NONE
+
+/* This enum specifies the operational mode for an SPS connection */
+enum sps_mode {
+ SPS_MODE_SRC = 0, /* end point is the source (producer) */
+ SPS_MODE_DEST, /* end point is the destination (consumer) */
+};
+
+
+/*
+ * This enum is a set of bit flag options for SPS connection.
+ * The enums should be OR'd together to create the option set
+ * for the SPS connection.
+ */
+enum sps_option {
+ /*
+ * Options to enable specific SPS hardware interrupts.
+ * These bit flags are also used to indicate interrupt source
+ * for the SPS_EVENT_IRQ event.
+ */
+ SPS_O_DESC_DONE = 0x00000001, /* Descriptor processed */
+ SPS_O_INACTIVE = 0x00000002, /* Inactivity timeout */
+ SPS_O_WAKEUP = 0x00000004, /* Peripheral wake up */
+ SPS_O_OUT_OF_DESC = 0x00000008,/* Out of descriptors */
+ SPS_O_ERROR = 0x00000010, /* Error */
+ SPS_O_EOT = 0x00000020, /* End-of-transfer */
+
+ /* Options to enable hardware features */
+ SPS_O_STREAMING = 0x00010000, /* Enable streaming mode (no EOT) */
+ /* Use MTI/SETPEND instead of BAM interrupt */
+ SPS_O_IRQ_MTI = 0x00020000,
+
+ /* Options to enable software features */
+ /* Transfer operation should be polled */
+ SPS_O_POLL = 0x01000000,
+ /* Disable queuing of transfer events for the connection end point */
+ SPS_O_NO_Q = 0x02000000,
+ SPS_O_FLOWOFF = 0x04000000, /* Graceful halt */
+ /* SPS_O_WAKEUP will be disabled after triggered */
+ SPS_O_WAKEUP_IS_ONESHOT = 0x08000000,
+ /**
+ * Client must read each descriptor from the FIFO
+ * using sps_get_iovec()
+ */
+ SPS_O_ACK_TRANSFERS = 0x10000000,
+ /* Connection is automatically enabled */
+ SPS_O_AUTO_ENABLE = 0x20000000,
+ /* DISABLE endpoint synchronization for config/enable/disable */
+ SPS_O_NO_EP_SYNC = 0x40000000,
+};
+
+/**
+ * This enum specifies BAM DMA channel priority. Clients should use
+ * SPS_DMA_PRI_DEFAULT unless a specific priority is required.
+ */
+enum sps_dma_priority {
+ SPS_DMA_PRI_DEFAULT = 0,
+ SPS_DMA_PRI_LOW,
+ SPS_DMA_PRI_MED,
+ SPS_DMA_PRI_HIGH,
+};
+
+/*
+ * This enum specifies the ownership of a connection resource.
+ * Remote or shared ownership is only possible/meaningful on the processor
+ * that controls resource.
+ */
+enum sps_owner {
+ SPS_OWNER_LOCAL = 0x1, /* Resource is owned by local processor */
+ SPS_OWNER_REMOTE = 0x2, /* Resource is owned by a satellite processor */
+};
+
+/* This enum indicates the event associated with a client event trigger */
+enum sps_event {
+ SPS_EVENT_INVALID = 0,
+
+ SPS_EVENT_EOT, /* End-of-transfer */
+ SPS_EVENT_DESC_DONE, /* Descriptor processed */
+ SPS_EVENT_OUT_OF_DESC, /* Out of descriptors */
+ SPS_EVENT_WAKEUP, /* Peripheral wake up */
+ SPS_EVENT_FLOWOFF, /* Graceful halt (idle) */
+ SPS_EVENT_INACTIVE, /* Inactivity timeout */
+ SPS_EVENT_ERROR, /* Error */
+ SPS_EVENT_MAX,
+};
+
+/*
+ * This enum specifies the event trigger mode and is an argument for the
+ * sps_register_event() function.
+ */
+enum sps_trigger {
+ /* Trigger with payload for callback */
+ SPS_TRIGGER_CALLBACK = 0,
+ /* Trigger without payload for wait or poll */
+ SPS_TRIGGER_WAIT,
+};
+
+/*
+ * This enum indicates the desired halting mechanism and is an argument for the
+ * sps_flow_off() function
+ */
+enum sps_flow_off {
+ SPS_FLOWOFF_FORCED = 0, /* Force hardware into halt state */
+ /* Allow hardware to empty pipe before halting */
+ SPS_FLOWOFF_GRACEFUL,
+};
+
+/*
+ * This enum indicates the target memory heap and is an argument for the
+ * sps_mem_alloc() function.
+ */
+enum sps_mem {
+ SPS_MEM_LOCAL = 0, /* SPS subsystem local (pipe) memory */
+ SPS_MEM_UC, /* Microcontroller (ARM7) local memory */
+};
+
+/*
+ * This enum indicates a timer control operation and is an argument for the
+ * sps_timer_ctrl() function.
+ */
+enum sps_timer_op {
+ SPS_TIMER_OP_CONFIG = 0,
+ SPS_TIMER_OP_RESET,
+/* SPS_TIMER_OP_START, Not supported by hardware yet */
+/* SPS_TIMER_OP_STOP, Not supported by hardware yet */
+ SPS_TIMER_OP_READ,
+};
+
+/*
+ * This enum indicates the inactivity timer operating mode and is an
+ * argument for the sps_timer_ctrl() function.
+ */
+enum sps_timer_mode {
+ SPS_TIMER_MODE_ONESHOT = 0,
+/* SPS_TIMER_MODE_PERIODIC, Not supported by hardware yet */
+};
+
+/**
+ * This data type corresponds to the native I/O vector (BAM descriptor)
+ * supported by SPS hardware
+ *
+ * @addr - Buffer physical address.
+ * @size - Buffer size in bytes.
+ * @flags -Flag bitmask (see SPS_IOVEC_FLAG_ #defines).
+ *
+ */
+struct sps_iovec {
+ u32 addr;
+ u32 size:16;
+ u32 flags:16;
+};
+
+/**
+ * This struct defines a BAM device. The client must memset() this struct to
+ * zero before writing device information. A value of zero for uninitialized
+ * values will instruct the SPS driver to use general defaults or
+ * hardware/BIOS supplied values.
+ *
+ *
+ * @options - See SPS_BAM_OPT_* bit flag.
+ * @phys_addr - BAM base physical address (not peripheral address).
+ * @virt_addr - BAM base virtual address.
+ * @virt_size - For virtual mapping.
+ * @irq - IRQ enum for use in ISR vector install.
+ * @num_pipes - number of pipes. Can be read from hardware.
+ * @summing_threshold - BAM event threshold.
+ *
+ * @periph_class - Peripheral device enumeration class.
+ * @periph_dev_id - Peripheral global device ID.
+ * @periph_phys_addr - Peripheral base physical address, for BAM-DMA only.
+ * @periph_virt_addr - Peripheral base virtual address.
+ * @periph_virt_size - Size for virtual mapping.
+ *
+ * @event_threshold - Pipe event threshold.
+ * @desc_size - Size (bytes) of descriptor FIFO.
+ * @data_size - Size (bytes) of data FIFO.
+ * @desc_mem_id - Heap ID for default descriptor FIFO allocations.
+ * @data_mem_id - Heap ID for default data FIFO allocations.
+ *
+ * @manage - BAM device management flags (see SPS_BAM_MGR_*).
+ * @restricted_pipes - Bitmask of pipes restricted from local use.
+ * @ee - Local execution environment index.
+ *
+ * @irq_gen_addr - MTI interrupt generation address. This configuration only
+ * applies to BAM rev 1 and 2 hardware. MTIs are only supported on BAMs when
+ * global config is controlled by a remote processor.
+ * NOTE: This address must correspond to the MTI associated with the "irq" IRQ
+ * enum specified above.
+ *
+ */
+struct sps_bam_props {
+
+ /* BAM device properties. */
+
+ u32 options;
+ u32 phys_addr;
+ void *virt_addr;
+ u32 virt_size;
+ u32 irq;
+ u32 num_pipes;
+ u32 summing_threshold;
+
+ /* Peripheral device properties */
+
+ u32 periph_class;
+ u32 periph_dev_id;
+ u32 periph_phys_addr;
+ void *periph_virt_addr;
+ u32 periph_virt_size;
+
+ /* Connection pipe parameter defaults. */
+
+ u32 event_threshold;
+ u32 desc_size;
+ u32 data_size;
+ u32 desc_mem_id;
+ u32 data_mem_id;
+
+ /* Security properties */
+
+ u32 manage;
+ u32 restricted_pipes;
+ u32 ee;
+
+ /* BAM MTI interrupt generation */
+
+ u32 irq_gen_addr;
+
+};
+
+/**
+ * This struct specifies memory buffer properties.
+ *
+ * @base - Buffer virtual address.
+ * @phys_base - Buffer physical address.
+ * @size - Specifies buffer size (or maximum size).
+ * @min_size - If non-zero, specifies buffer minimum size.
+ *
+ */
+struct sps_mem_buffer {
+ void *base;
+ u32 phys_base;
+ u32 size;
+ u32 min_size;
+};
+
+/**
+ * This struct defines a connection's end point and is used as the argument
+ * for the sps_connect(), sps_get_config(), and sps_set_config() functions.
+ * For system mode pipe, use SPS_DEV_HANDLE_MEM for the end point that
+ * corresponds to system memory.
+ *
+ * The client can force SPS to reserve a specific pipe on a BAM.
+ * If the pipe is in use, the sps_connect/set_config() will fail.
+ *
+ * @source - Source BAM.
+ * @src_pipe_index - BAM pipe index, 0 to 30.
+ * @destination - Destination BAM.
+ * @dest_pipe_index - BAM pipe index, 0 to 30.
+ *
+ * @mode - specifies which end (source or destination) of the connection will
+ * be controlled/referenced by the client.
+ *
+ * @config - This value is for future use and should be set to
+ * SPS_CONFIG_DEFAULT or left as default from sps_get_config().
+ *
+ * @options - OR'd connection end point options (see SPS_O defines).
+ *
+ * WARNING: The memory provided should be physically contiguous and non-cached.
+ * The user can use one of the following:
+ * 1. sps_alloc_mem() - allocated from pipe-memory.
+ * 2. dma_alloc_coherent() - allocate coherent DMA memory.
+ * 3. dma_map_single() - for using memory allocated by kmalloc().
+ *
+ * @desc - Descriptor FIFO.
+ * @data - Data FIFO (BAM-to-BAM mode only).
+ *
+ * @event_thresh - Pipe event threshold or derivative.
+ *
+ * @sps_reserved - Reserved word - client must not modify.
+ *
+ */
+struct sps_connect {
+ u32 source;
+ u32 src_pipe_index;
+ u32 destination;
+ u32 dest_pipe_index;
+
+ enum sps_mode mode;
+
+ u32 config;
+
+ enum sps_option options;
+
+ struct sps_mem_buffer desc;
+ struct sps_mem_buffer data;
+
+ u32 event_thresh;
+
+ /* SETPEND/MTI interrupt generation parameters */
+
+ u32 irq_gen_addr;
+ u32 irq_gen_data;
+
+ u32 sps_reserved;
+
+};
+
+/**
+ * This struct defines a satellite connection's end point. The client of the
+ * SPS driver on the satellite processor must call sps_get_config() to
+ * initialize a struct sps_connect, then copy the values from the struct
+ * sps_satellite to the struct sps_connect before making the sps_connect()
+ * call to the satellite SPS driver.
+ *
+ */
+struct sps_satellite {
+ /**
+ * These values must be copied to either the source or destination
+ * corresponding values in the connect struct.
+ */
+ u32 dev;
+ u32 pipe_index;
+
+ /**
+ * These values must be copied to the corresponding values in the
+ * connect struct
+ */
+ u32 config;
+ enum sps_option options;
+
+};
+
+/**
+ * This struct defines parameters for allocation of a BAM DMA channel. The
+ * client must memset() this struct to zero before writing allocation
+ * information. A value of zero for uninitialized values will instruct
+ * the SPS driver to use defaults or "don't care".
+ *
+ * @dev - Associated BAM device handle, or SPS_DEV_HANDLE_DMA.
+ *
+ * @src_owner - Source owner processor ID.
+ * @dest_owner - Destination owner processor ID.
+ *
+ */
+struct sps_alloc_dma_chan {
+ u32 dev;
+
+ /* BAM DMA channel configuration parameters */
+
+ u32 threshold;
+ enum sps_dma_priority priority;
+
+ /**
+ * Owner IDs are global host processor identifiers used by the system
+ * SROT when establishing execution environments.
+ */
+ u32 src_owner;
+ u32 dest_owner;
+
+};
+
+/**
+ * This struct defines parameters for an allocated BAM DMA channel.
+ *
+ * @dev - BAM DMA device handle.
+ * @dest_pipe_index - Destination/input/write pipe index.
+ * @src_pipe_index - Source/output/read pipe index.
+ *
+ */
+struct sps_dma_chan {
+ u32 dev;
+ u32 dest_pipe_index;
+ u32 src_pipe_index;
+};
+
+/**
+ * This struct is an argument passed payload when triggering a callback event
+ * object registered for an SPS connection end point.
+ *
+ * @user - Pointer registered with sps_register_event().
+ *
+ * @event_id - Which event.
+ *
+ * @iovec - The associated I/O vector. If the end point is a system-mode
+ * producer, the size will reflect the actual number of bytes written to the
+ * buffer by the pipe. NOTE: If this I/O vector was part of a set submitted to
+ * sps_transfer(), then the vector array itself will be updated with all of
+ * the actual counts.
+ *
+ * @user - Pointer registered with the transfer.
+ *
+ */
+struct sps_event_notify {
+ void *user;
+
+ enum sps_event event_id;
+
+ /* Data associated with the event */
+
+ union {
+ /* Data for SPS_EVENT_IRQ */
+ struct {
+ u32 mask;
+ } irq;
+
+ /* Data for SPS_EVENT_EOT or SPS_EVENT_DESC_DONE */
+
+ struct {
+ struct sps_iovec iovec;
+ void *user;
+ } transfer;
+
+ /* Data for SPS_EVENT_ERROR */
+
+ struct {
+ u32 status;
+ } err;
+
+ } data;
+};
+
+/**
+ * This struct defines a event registration parameters and is used as the
+ * argument for the sps_register_event() function.
+ *
+ * @options - Event options that will trigger the event object.
+ * @mode - Event trigger mode.
+ *
+ * @xfer_done - a pointer to a completion object. NULL if not in use.
+ *
+ * @callback - a callback to call on completion. NULL if not in use.
+ *
+ * @user - User pointer that will be provided in event callback data.
+ *
+ */
+struct sps_register_event {
+ enum sps_option options;
+ enum sps_trigger mode;
+ struct completion *xfer_done;
+ void (*callback)(struct sps_event_notify *notify);
+ void *user;
+};
+
+/**
+ * This struct defines a system memory transfer's parameters and is used as the
+ * argument for the sps_transfer() function.
+ *
+ * @iovec_phys - Physical address of I/O vectors buffer.
+ * @iovec - Pointer to I/O vectors buffer.
+ * @iovec_count - Number of I/O vectors.
+ * @user - User pointer passed in callback event.
+ *
+ */
+struct sps_transfer {
+ u32 iovec_phys;
+ struct sps_iovec *iovec;
+ u32 iovec_count;
+ void *user;
+};
+
+/**
+ * This struct defines a timer control operation parameters and is used as an
+ * argument for the sps_timer_ctrl() function.
+ *
+ * @op - Timer control operation.
+ * @timeout_msec - Inactivity timeout (msec).
+ *
+ */
+struct sps_timer_ctrl {
+ enum sps_timer_op op;
+
+ /**
+ * The following configuration parameters must be set when the timer
+ * control operation is SPS_TIMER_OP_CONFIG.
+ */
+ enum sps_timer_mode mode;
+ u32 timeout_msec;
+};
+
+/**
+ * This struct defines a timer control operation result and is used as an
+ * argument for the sps_timer_ctrl() function.
+ */
+struct sps_timer_result {
+ u32 current_timer;
+};
+
+
+/*----------------------------------------------------------------------------
+ * Functions specific to sps interface
+ * -------------------------------------------------------------------------*/
+struct sps_pipe; /* Forward declaration */
+
+/**
+ * Register a BAM device
+ *
+ * This function registers a BAM device with the SPS driver. For each
+ *peripheral that includes a BAM, the peripheral driver must register
+ * the BAM with the SPS driver.
+ *
+ * A requirement is that the peripheral driver must remain attached
+ * to the SPS driver until the BAM is deregistered. Otherwise, the
+ * system may attempt to unload the SPS driver. BAM registrations would
+ * be lost.
+ *
+ * @bam_props - Pointer to struct for BAM device properties.
+ *
+ * @dev_handle - Device handle will be written to this location (output).
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_register_bam_device(const struct sps_bam_props *bam_props,
+ u32 *dev_handle);
+
+/**
+ * Deregister a BAM device
+ *
+ * This function deregisters a BAM device from the SPS driver. The peripheral
+ * driver should deregister a BAM when the peripheral driver is shut down or
+ * when BAM use should be disabled.
+ *
+ * A BAM cannot be deregistered if any of its pipes is in an active connection.
+ *
+ * When all BAMs have been deregistered, the system is free to unload the
+ * SPS driver.
+ *
+ * @dev_handle - BAM device handle.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_deregister_bam_device(u32 dev_handle);
+
+/**
+ * Allocate client state context
+ *
+ * This function allocate and initializes a client state context struct.
+ *
+ * @return pointer to client state context
+ *
+ */
+struct sps_pipe *sps_alloc_endpoint(void);
+
+/**
+ * Free client state context
+ *
+ * This function de-initializes and free a client state context struct.
+ *
+ * @ctx - client context for SPS connection end point
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_free_endpoint(struct sps_pipe *h);
+
+/**
+ * Get the configuration parameters for an SPS connection end point
+ *
+ * This function retrieves the configuration parameters for an SPS connection
+ * end point.
+ * This function may be called before the end point is connected (before
+ * sps_connect is called). This allows the client to specify parameters before
+ * the connection is established.
+ *
+ * The client must call this function to fill it's struct sps_connect
+ * struct before modifying values and passing the struct to sps_set_config().
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @config - Pointer to buffer for the end point's configuration parameters.
+ * Must not be NULL.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_get_config(struct sps_pipe *h, struct sps_connect *config);
+
+/**
+ * Allocate memory from the SPS Pipe-Memory.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @mem - memory type - N/A.
+ *
+ * @mem_buffer - Pointer to struct for allocated memory properties.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_alloc_mem(struct sps_pipe *h, enum sps_mem mem,
+ struct sps_mem_buffer *mem_buffer);
+
+/**
+ * Free memory from the SPS Pipe-Memory.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @mem_buffer - Pointer to struct for allocated memory properties.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_free_mem(struct sps_pipe *h, struct sps_mem_buffer *mem_buffer);
+
+/**
+ * Connect an SPS connection end point
+ *
+ * This function creates a connection between two SPS peripherals or between
+ * an SPS peripheral and the local host processor (via system memory, end
+ *point SPS_DEV_HANDLE_MEM). Establishing the connection includes
+ * initialization of the SPS hardware and allocation of any other connection
+ * resources (buffer memory, etc.).
+ *
+ * This function requires the client to specify both the source and
+ * destination end points of the SPS connection. However, the handle
+ * returned applies only to the end point of the connection that the client
+ * controls. The end point under control must be specified by the
+ * enum sps_mode mode argument, either SPS_MODE_SRC, SPS_MODE_DEST, or
+ * SPS_MODE_CTL. Note that SPS_MODE_CTL is only supported for I/O
+ * accelerator connections, and only a limited set of control operations are
+ * allowed (TBD).
+ *
+ * For a connection involving system memory
+ * (SPS_DEV_HANDLE_MEM), the peripheral end point must be
+ * specified. For example, SPS_MODE_SRC must be specified for a
+ * BAM-to-system connection, since the BAM pipe is the data
+ * producer.
+ *
+ * For a specific peripheral-to-peripheral connection, there may be more than
+ * one required configuration. For example, there might be high-performance
+ * and low-power configurations for a connection between the two peripherals.
+ * The config argument allows the client to specify different configurations,
+ * which may require different system resource allocations and hardware
+ * initialization.
+ *
+ * A client is allowed to create one and only one connection for its
+ * struct sps_pipe. The handle is used to identify the connection end point
+ * in subsequent SPS driver calls. A specific connection source or
+ * destination end point can be associated with one and only one
+ * struct sps_pipe.
+ *
+ * The client must establish an open device handle to the SPS. To do so, the
+ * client must attach to the SPS driver and open the SPS device by calling
+ * the following functions.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @connect - Pointer to connection parameters
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_connect(struct sps_pipe *h, struct sps_connect *connect);
+
+/**
+ * Disconnect an SPS connection end point
+ *
+ * This function disconnects an SPS connection end point.
+ * The SPS hardware associated with that end point will be disabled.
+ * For a connection involving system memory (SPS_DEV_HANDLE_MEM), all
+ * connection resources are deallocated. For a peripheral-to-peripheral
+ * connection, the resources associated with the connection will not be
+ * deallocated until both end points are closed.
+ *
+ * The client must call sps_connect() for the handle before calling
+ * this function.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_disconnect(struct sps_pipe *h);
+
+/**
+ * Register an event object for an SPS connection end point
+ *
+ * This function registers a callback event object for an SPS connection end
+ *point. The registered event object will be triggered for the set of
+ * events specified in reg->options that are enabled for the end point.
+ *
+ * There can only be one registered event object for each event. If an event
+ * object is already registered for an event, it will be replaced. If
+ *reg->event handle is NULL, then any registered event object for the
+ * event will be deregistered. Option bits in reg->options not associated
+ * with events are ignored.
+ *
+ * The client must call sps_connect() for the handle before calling
+ * this function.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @reg - Pointer to event registration parameters
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_register_event(struct sps_pipe *h, struct sps_register_event *reg);
+
+/**
+ * Perform a single DMA transfer on an SPS connection end point
+ *
+ * This function submits a DMA transfer request consisting of a single buffer
+ * for an SPS connection end point associated with a peripheral-to/from-memory
+ * connection. The request will be submitted immediately to hardware if the
+ * hardware is idle (data flow off, no other pending transfers). Otherwise, it
+ * will be queued for later handling in the SPS driver work loop.
+ *
+ * The data buffer must be DMA ready. The client is responsible for insuring
+ *physically contiguous memory, cache maintenance, and memory barrier. For
+ * more information, see Appendix A.
+ *
+ * The client must not modify the data buffer until the completion indication is
+ * received.
+ *
+ * This function cannot be used if transfer queuing is disabled (see option
+ * SPS_O_NO_Q). The client must set the SPS_O_EOT option to receive a callback
+ * event trigger when the transfer is complete. The SPS driver will insure the
+ * appropriate flags in the I/O vectors are set to generate the completion
+ * indication.
+ *
+ * The return value from this function may indicate that an error occurred.
+ * Possible causes include invalid arguments.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @addr - Physical address of buffer to transfer.
+ *
+ * WARNING: The memory provided should be physically contiguous and
+ * non-cached.
+ *
+ * The user can use one of the following:
+ * 1. sps_alloc_mem() - allocated from pipe-memory.
+ * 2. dma_alloc_coherent() - allocate DMA memory.
+ * 3. dma_map_single() for memory allocated by kmalloc().
+ *
+ * @size - Size in bytes of buffer to transfer
+ *
+ * @user - User pointer that will be returned to user as part of
+ * event payload
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_transfer_one(struct sps_pipe *h, u32 addr, u32 size,
+ void *user, u32 flags);
+
+/**
+ * Read event queue for an SPS connection end point
+ *
+ * This function reads event queue for an SPS connection end point.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @event - pointer to client's event data buffer
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_get_event(struct sps_pipe *h, struct sps_event_notify *event);
+
+/**
+ * Get processed I/O vector (completed transfers)
+ *
+ * This function fetches the next processed I/O vector.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @iovec - Pointer to I/O vector struct (output).
+ * This struct will be zeroed if there are no more processed I/O vectors.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_get_iovec(struct sps_pipe *h, struct sps_iovec *iovec);
+
+/**
+ * Enable an SPS connection end point
+ *
+ * This function enables an SPS connection end point.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_flow_on(struct sps_pipe *h);
+
+/**
+ * Disable an SPS connection end point
+ *
+ * This function disables an SPS connection end point.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @mode - Desired mode for disabling pipe data flow
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_flow_off(struct sps_pipe *h, enum sps_flow_off mode);
+
+/**
+ * Perform a Multiple DMA transfer on an SPS connection end point
+ *
+ * This function submits a DMA transfer request for an SPS connection end point
+ * associated with a peripheral-to/from-memory connection. The request will be
+ * submitted immediately to hardware if the hardware is idle (data flow off, no
+ * other pending transfers). Otherwise, it will be queued for later handling in
+ * the SPS driver work loop.
+ *
+ * The data buffers referenced by the I/O vectors must be DMA ready.
+ * The client is responsible for insuring physically contiguous memory,
+ * any cache maintenance, and memory barrier. For more information,
+ * see Appendix A.
+ *
+ * The I/O vectors must specify physical addresses for the referenced buffers.
+ *
+ * The client must not modify the data buffers referenced by I/O vectors until
+ * the completion indication is received.
+ *
+ * If transfer queuing is disabled (see option SPS_O_NO_Q), the client is
+ * responsible for setting the appropriate flags in the I/O vectors to generate
+ * the completion indication. Also, the client is responsible for enabling the
+ * appropriate connection callback event options for completion indication (see
+ * sps_connect(), sps_set_config()).
+ *
+ * If transfer queuing is enabled, the client must set the SPS_O_EOT option to
+ * receive a callback event trigger when the transfer is complete. The SPS
+ * driver will insure the appropriate flags in the I/O vectors are set to
+ * generate the completion indication. The client must not set any flags in the
+ * I/O vectors, as this may cause the SPS driver to become out of sync with the
+ * hardware.
+ *
+ * The return value from this function may indicate that an error occurred.
+ * Possible causes include invalid arguments. If transfer queuing is disabled,
+ * an error will occur if the pipe is already processing a transfer.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @transfer - Pointer to transfer parameter struct
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_transfer(struct sps_pipe *h, struct sps_transfer *transfer);
+
+/**
+ * Determine whether an SPS connection end point FIFO is empty
+ *
+ * This function returns the empty state of an SPS connection end point.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @empty - pointer to client's empty status word (boolean)
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_is_pipe_empty(struct sps_pipe *h, u32 *empty);
+
+/**
+ * Reset an SPS BAM device
+ *
+ * This function resets an SPS BAM device.
+ *
+ * @dev - device handle for the BAM
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_device_reset(u32 dev);
+
+/**
+ * Set the configuration parameters for an SPS connection end point
+ *
+ * This function sets the configuration parameters for an SPS connection
+ * end point. This function may be called before the end point is connected
+ * (before sps_connect is called). This allows the client to specify
+ *parameters before the connection is established. The client is allowed
+ * to pre-allocate resources and override driver defaults.
+ *
+ * The client must call sps_get_config() to fill it's struct sps_connect
+ * struct before modifying values and passing the struct to this function.
+ * Only those parameters that differ from the current configuration will
+ * be processed.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @config - Pointer to the end point's new configuration parameters.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_set_config(struct sps_pipe *h, struct sps_connect *config);
+
+/**
+ * Set ownership of an SPS connection end point
+ *
+ * This function sets the ownership of an SPS connection end point to
+ * either local (default) or non-local. This function is used to
+ * retrieve the struct sps_connect data that must be used by a
+ * satellite processor when calling sps_connect().
+ *
+ * Non-local ownership is only possible/meaningful on the processor
+ * that controls resource allocations (apps processor). Setting ownership
+ * to non-local on a satellite processor will fail.
+ *
+ * Setting ownership from non-local to local will succeed only if the
+ * owning satellite processor has properly brought the end point to
+ * an idle condition.
+ *
+ * This function will succeed if the connection end point is already in
+ * the specified ownership state.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @owner - New ownership of the connection end point
+ *
+ * @connect - Pointer to buffer for satellite processor connect data.
+ * Can be NULL to avoid retrieving the connect data. Will be ignored
+ * if the end point ownership is set to local.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_set_owner(struct sps_pipe *h, enum sps_owner owner,
+ struct sps_satellite *connect);
+
+/**
+ * Allocate a BAM DMA channel
+ *
+ * This function allocates a BAM DMA channel. A "BAM DMA" is a special
+ * DMA peripheral with a BAM front end. The DMA peripheral acts as a conduit
+ * for data to flow into a consumer pipe and then out of a producer pipe.
+ * It's primarily purpose is to serve as a path for interprocessor communication
+ * that allows each processor to control and protect it's own memory space.
+ *
+ * @alloc - Pointer to struct for BAM DMA channel allocation properties.
+ *
+ * @chan - Allocated channel information will be written to this
+ * location (output).
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_alloc_dma_chan(const struct sps_alloc_dma_chan *alloc,
+ struct sps_dma_chan *chan);
+
+/**
+ * Free a BAM DMA channel
+ *
+ * This function frees a BAM DMA channel.
+ *
+ * @chan - Pointer to information for channel to free
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_free_dma_chan(struct sps_dma_chan *chan);
+
+/**
+ * Get the BAM handle for BAM-DMA.
+ *
+ * The BAM handle should be use as source/destination in the sps_connect().
+ *
+ * @return handle on success, zero on error
+ *
+ */
+u32 sps_dma_get_bam_handle(void);
+
+/**
+ * Free the BAM handle for BAM-DMA.
+ *
+ */
+void sps_dma_free_bam_handle(u32 h);
+
+
+/**
+ * Get number of free transfer entries for an SPS connection end point
+ *
+ * This function returns the number of free transfer entries for an
+ * SPS connection end point.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @count - pointer to count status
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_get_free_count(struct sps_pipe *h, u32 *count);
+
+/**
+ * Perform timer control
+ *
+ * This function performs timer control operations.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @timer_ctrl - Pointer to timer control specification
+ *
+ * @timer_result - Pointer to buffer for timer operation result.
+ * This argument can be NULL if no result is expected for the operation.
+ * If non-NULL, the current timer value will always provided.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_timer_ctrl(struct sps_pipe *h,
+ struct sps_timer_ctrl *timer_ctrl,
+ struct sps_timer_result *timer_result);
+
+#endif /* _SPS_H_ */
diff --git a/arch/arm/mach-msm/sps/Makefile b/arch/arm/mach-msm/sps/Makefile
new file mode 100644
index 0000000..f19e162
--- /dev/null
+++ b/arch/arm/mach-msm/sps/Makefile
@@ -0,0 +1,2 @@
+obj-y += bam.o sps_bam.o sps.o sps_dma.o sps_map.o sps_mem.o sps_rm.o
+
diff --git a/arch/arm/mach-msm/sps/bam.c b/arch/arm/mach-msm/sps/bam.c
new file mode 100644
index 0000000..be6b038
--- /dev/null
+++ b/arch/arm/mach-msm/sps/bam.c
@@ -0,0 +1,588 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Bus-Access-Manager (BAM) Hardware manager. */
+
+#include <linux/types.h> /* u32 */
+#include <linux/kernel.h> /* pr_info() */
+#include <linux/io.h> /* ioread32() */
+#include <linux/bitops.h> /* find_first_bit() */
+#include <linux/errno.h> /* ENODEV */
+
+#include "bam.h"
+
+/**
+ * Valid BAM Hardware version.
+ *
+ */
+#define BAM_MIN_VERSION 2
+#define BAM_MAX_VERSION 2
+
+/**
+ * BAM Hardware registers.
+ *
+ */
+#define CTRL (0xf80)
+#define REVISION (0xf84)
+#define NUM_PIPES (0xfbc)
+#define DESC_CNT_TRSHLD (0xf88)
+#define IRQ_SRCS (0xf8c)
+#define IRQ_SRCS_MSK (0xf90)
+#define IRQ_SRCS_UNMASKED (0xfb0)
+#define IRQ_STTS (0xf94)
+#define IRQ_CLR (0xf98)
+#define IRQ_EN (0xf9c)
+#define IRQ_SIC_SEL (0xfa0)
+#define AHB_MASTER_ERR_CTRLS (0xfa4)
+#define AHB_MASTER_ERR_ADDR (0xfa8)
+#define AHB_MASTER_ERR_DATA (0xfac)
+#define IRQ_DEST (0xfb4)
+#define PERIPH_IRQ_DEST (0xfb8)
+#define TEST_BUS_REG (0xff8)
+#define CNFG_BITS (0xffc)
+
+#define P_CTRL(n) (0x0000 + 128 * (n))
+#define P_RST(n) (0x0004 + 128 * (n))
+#define P_HALT(n) (0x0008 + 128 * (n))
+#define P_IRQ_STTS(n) (0x0010 + 128 * (n))
+#define P_IRQ_CLR(n) (0x0014 + 128 * (n))
+#define P_IRQ_EN(n) (0x0018 + 128 * (n))
+#define P_TIMER(n) (0x001c + 128 * (n))
+#define P_TIMER_CTRL(n) (0x0020 + 128 * (n))
+#define P_EVNT_DEST_ADDR(n) (0x102c + 64 * (n))
+#define P_EVNT_REG(n) (0x1018 + 64 * (n))
+#define P_SW_OFSTS(n) (0x1000 + 64 * (n))
+#define P_DATA_FIFO_ADDR(n) (0x1024 + 64 * (n))
+#define P_DESC_FIFO_ADDR(n) (0x101c + 64 * (n))
+#define P_EVNT_GEN_TRSHLD(n) (0x1028 + 64 * (n))
+#define P_FIFO_SIZES(n) (0x1020 + 64 * (n))
+#define P_IRQ_DEST_ADDR(n) (0x103c + 64 * (n))
+#define P_RETR_CNTXT(n) (0x1034 + 64 * (n))
+#define P_SI_CNTXT(n) (0x1038 + 64 * (n))
+#define P_AU_PSM_CNTXT_1(n) (0x1004 + 64 * (n))
+#define P_PSM_CNTXT_2(n) (0x1008 + 64 * (n))
+#define P_PSM_CNTXT_3(n) (0x100c + 64 * (n))
+#define P_PSM_CNTXT_4(n) (0x1010 + 64 * (n))
+#define P_PSM_CNTXT_5(n) (0x1014 + 64 * (n))
+
+/**
+ * BAM Hardware registers bitmask.
+ * format: <register>_<field>
+ *
+ */
+/* CTRL */
+#define BAM_CACHED_DESC_STORE 0x8000
+#define BAM_DESC_CACHE_SEL 0x6000
+#define BAM_PERIPH_IRQ_SIC_SEL 0x1000
+#define BAM_TESTBUS_SEL 0xfe0
+#define BAM_EN_ACCUM 0x10
+#define BAM_EN 0x2
+#define BAM_SW_RST 0x1
+
+/* IRQ_SRCS */
+#define BAM_IRQ 0x80000000
+#define P_IRQ 0x7fffffff
+
+#define IRQ_STTS_BAM_ERROR_IRQ 0x4
+#define IRQ_STTS_BAM_HRESP_ERR_IRQ 0x2
+#define IRQ_CLR_BAM_ERROR_CLR 0x4
+#define IRQ_CLR_BAM_HRESP_ERR_CLR 0x2
+#define IRQ_EN_BAM_ERROR_EN 0x4
+#define IRQ_EN_BAM_HRESP_ERR_EN 0x2
+#define IRQ_SIC_SEL_BAM_IRQ_SIC_SEL 0x80000000
+#define IRQ_SIC_SEL_P_IRQ_SIC_SEL 0x7fffffff
+#define AHB_MASTER_ERR_CTRLS_BAM_ERR_DIRECT_MODE 0x10000
+#define AHB_MASTER_ERR_CTRLS_BAM_ERR_HCID 0xf000
+#define AHB_MASTER_ERR_CTRLS_BAM_ERR_HPROT 0xf00
+#define AHB_MASTER_ERR_CTRLS_BAM_ERR_HBURST 0xe0
+#define AHB_MASTER_ERR_CTRLS_BAM_ERR_HSIZE 0x18
+#define AHB_MASTER_ERR_CTRLS_BAM_ERR_HWRITE 0x4
+#define AHB_MASTER_ERR_CTRLS_BAM_ERR_HTRANS 0x3
+#define CNFG_BITS_BAM_FULL_PIPE 0x800
+#define CNFG_BITS_BAM_PIPE_CNFG 0x4
+
+/* P_ctrln */
+#define P_SYS_MODE 0x20
+#define P_SYS_STRM 0x10
+#define P_DIRECTION 0x8
+#define P_EN 0x2
+
+#define P_RST_P_SW_RST 0x1
+
+#define P_HALT_P_PROD_HALTED 0x2
+#define P_HALT_P_HALT 0x1
+
+#define P_IRQ_STTS_P_TRNSFR_END_IRQ 0x20
+#define P_IRQ_STTS_P_ERR_IRQ 0x10
+#define P_IRQ_STTS_P_OUT_OF_DESC_IRQ 0x8
+#define P_IRQ_STTS_P_WAKE_IRQ 0x4
+#define P_IRQ_STTS_P_TIMER_IRQ 0x2
+#define P_IRQ_STTS_P_PRCSD_DESC_IRQ 0x1
+
+#define P_IRQ_CLR_P_TRNSFR_END_CLR 0x20
+#define P_IRQ_CLR_P_ERR_CLR 0x10
+#define P_IRQ_CLR_P_OUT_OF_DESC_CLR 0x8
+#define P_IRQ_CLR_P_WAKE_CLR 0x4
+#define P_IRQ_CLR_P_TIMER_CLR 0x2
+#define P_IRQ_CLR_P_PRCSD_DESC_CLR 0x1
+
+#define P_IRQ_EN_P_TRNSFR_END_EN 0x20
+#define P_IRQ_EN_P_ERR_EN 0x10
+#define P_IRQ_EN_P_OUT_OF_DESC_EN 0x8
+#define P_IRQ_EN_P_WAKE_EN 0x4
+#define P_IRQ_EN_P_TIMER_EN 0x2
+#define P_IRQ_EN_P_PRCSD_DESC_EN 0x1
+
+#define P_TIMER_P_TIMER 0xffff
+
+/* P_TIMER_ctrln */
+#define P_TIMER_RST 0x80000000
+#define P_TIMER_RUN 0x40000000
+#define P_TIMER_MODE 0x20000000
+#define P_TIMER_TRSHLD 0xffff
+
+/* P_EVNT_regn */
+#define P_BYTES_CONSUMED 0xffff0000
+#define P_DESC_FIFO_PEER_OFST 0xffff
+
+/* P_SW_ofstsn */
+#define SW_OFST_IN_DESC 0xffff0000
+#define SW_DESC_OFST 0xffff
+
+#define P_EVNT_GEN_TRSHLD_P_TRSHLD 0xffff
+
+/* P_FIFO_sizesn */
+#define P_DATA_FIFO_SIZE 0xffff0000
+#define P_DESC_FIFO_SIZE 0xffff
+
+#define P_RETR_CNTXT_RETR_DESC_OFST 0xffff0000
+#define P_RETR_CNTXT_RETR_OFST_IN_DESC 0xffff
+#define P_SI_CNTXT_SI_DESC_OFST 0xffff
+#define P_AU_PSM_CNTXT_1_AU_PSM_ACCUMED 0xffff0000
+#define P_AU_PSM_CNTXT_1_AU_ACKED 0xffff
+#define P_PSM_CNTXT_2_PSM_DESC_VALID 0x80000000
+#define P_PSM_CNTXT_2_PSM_DESC_IRQ 0x40000000
+#define P_PSM_CNTXT_2_PSM_DESC_IRQ_DONE 0x20000000
+#define P_PSM_CNTXT_2_PSM_GENERAL_BITS 0x1e000000
+#define P_PSM_CNTXT_2_PSM_CONS_STATE 0x1c00000
+#define P_PSM_CNTXT_2_PSM_PROD_SYS_STATE 0x380000
+#define P_PSM_CNTXT_2_PSM_PROD_B2B_STATE 0x70000
+#define P_PSM_CNTXT_2_PSM_DESC_SIZE 0xffff
+#define P_PSM_CNTXT_4_PSM_DESC_OFST 0xffff0000
+#define P_PSM_CNTXT_4_PSM_SAVED_ACCUMED_SIZE 0xffff
+#define P_PSM_CNTXT_5_PSM_BLOCK_BYTE_CNT 0xffff0000
+#define P_PSM_CNTXT_5_PSM_OFST_IN_DESC 0xffff
+
+#define BAM_ERROR (-1)
+
+/**
+ *
+ * Read register with debug info.
+ *
+ * @base - bam base virtual address.
+ * @offset - register offset.
+ *
+ * @return u32
+ */
+static inline u32 bam_read_reg(void *base, u32 offset)
+{
+ u32 val = ioread32(base + offset);
+ pr_debug("bam: read reg 0x%x r_val 0x%x.\n", offset, val);
+ return val;
+}
+
+/**
+ * Read register masked field with debug info.
+ *
+ * @base - bam base virtual address.
+ * @offset - register offset.
+ * @mask - register bitmask.
+ *
+ * @return u32
+ */
+static inline u32 bam_read_reg_field(void *base, u32 offset, const u32 mask)
+{
+ u32 shift = find_first_bit((void *)&mask, 32);
+ u32 val = ioread32(base + offset);
+ val &= mask; /* clear other bits */
+ val >>= shift;
+ pr_debug("bam: read reg 0x%x mask 0x%x r_val 0x%x.\n",
+ offset, mask, val);
+ return val;
+}
+
+/**
+ *
+ * Write register with debug info.
+ *
+ * @base - bam base virtual address.
+ * @offset - register offset.
+ * @val - value to write.
+ *
+ */
+static inline void bam_write_reg(void *base, u32 offset, u32 val)
+{
+ iowrite32(val, base + offset);
+ pr_debug("bam: write reg 0x%x w_val 0x%x.\n", offset, val);
+}
+
+/**
+ * Write register masked field with debug info.
+ *
+ * @base - bam base virtual address.
+ * @offset - register offset.
+ * @mask - register bitmask.
+ * @val - value to write.
+ *
+ */
+static inline void bam_write_reg_field(void *base, u32 offset,
+ const u32 mask, u32 val)
+{
+ u32 shift = find_first_bit((void *)&mask, 32);
+ u32 tmp = ioread32(base + offset);
+
+ tmp &= ~mask; /* clear written bits */
+ val = tmp | (val << shift);
+ iowrite32(val, base + offset);
+ pr_debug("bam: write reg 0x%x w_val 0x%x.\n", offset, val);
+}
+
+/**
+ * Initialize a BAM device
+ *
+ */
+int bam_init(void *base, u32 ee,
+ u16 summing_threshold,
+ u32 irq_mask, u32 *version, u32 *num_pipes)
+{
+ /* disable bit#11 because of HW bug */
+ u32 cfg_bits = 0xffffffff & ~(1 << 11);
+ u32 ver = 0;
+
+ ver = bam_read_reg(base, REVISION);
+
+ if ((ver < BAM_MIN_VERSION) || (ver > BAM_MAX_VERSION)) {
+ pr_err("bam:Invalid BAM version 0x%x.\n", ver);
+ return -ENODEV;
+ }
+
+ if (summing_threshold == 0) {
+ summing_threshold = 4;
+ pr_err("bam:summing_threshold is zero , use default 4.\n");
+ }
+
+ bam_write_reg_field(base, CTRL, BAM_SW_RST, 1);
+ /* No delay needed */
+ bam_write_reg_field(base, CTRL, BAM_SW_RST, 0);
+
+ bam_write_reg_field(base, CTRL, BAM_EN, 1);
+
+ bam_write_reg(base, DESC_CNT_TRSHLD, summing_threshold);
+
+ bam_write_reg(base, CNFG_BITS, cfg_bits);
+
+ /*
+ * Enable Global BAM Interrupt - for error reasons ,
+ * filter with mask.
+ * Note: Pipes interrupts are disabled until BAM_P_IRQ_enn is set
+ */
+ bam_write_reg_field(base, IRQ_SRCS_MSK, BAM_IRQ, 1);
+
+ bam_write_reg(base, IRQ_EN, irq_mask);
+
+ *num_pipes = bam_read_reg(base, NUM_PIPES);
+ *version = ver;
+
+ return 0;
+}
+
+/**
+ * Verify that a BAM device is enabled and gathers the hardware
+ * configuration.
+ *
+ */
+int bam_check(void *base, u32 *version, u32 *num_pipes)
+{
+ u32 ver = 0;
+
+ if (!bam_read_reg_field(base, CTRL, BAM_EN))
+ return -ENODEV;
+
+ ver = bam_read_reg(base, REVISION);
+
+ /*
+ * Discover the hardware version number and the number of pipes
+ * supported by this BAM
+ */
+ *num_pipes = bam_read_reg(base, NUM_PIPES);
+ *version = ver;
+
+ /* Check BAM version */
+ if ((ver < BAM_MIN_VERSION) || (ver > BAM_MAX_VERSION)) {
+ pr_err("bam:Invalid BAM version 0x%x.\n", ver);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * Disable a BAM device
+ *
+ */
+void bam_exit(void *base, u32 ee)
+{
+ bam_write_reg_field(base, IRQ_SRCS_MSK, BAM_IRQ, 0);
+
+ bam_write_reg(base, IRQ_EN, 0);
+
+ /* Disable the BAM */
+ bam_write_reg_field(base, CTRL, BAM_EN, 0);
+}
+
+/**
+ * Get and Clear BAM global IRQ status
+ *
+ * note: clear status only for pipes controlled by this
+ * processor
+ */
+u32 bam_get_and_clear_irq_status(void *base, u32 ee, u32 mask)
+{
+ u32 status = bam_read_reg(base, IRQ_SRCS);
+ u32 clr = status &= mask;
+
+ bam_write_reg(base, IRQ_CLR, clr);
+
+ return status;
+}
+
+/**
+ * Initialize a BAM pipe
+ */
+int bam_pipe_init(void *base, u32 pipe, struct bam_pipe_parameters *param)
+{
+ /* Reset the BAM pipe */
+ bam_write_reg(base, P_RST(pipe), 1);
+ /* No delay needed */
+ bam_write_reg(base, P_RST(pipe), 0);
+
+ /* Enable the Pipe Interrupt at the BAM level */
+ bam_write_reg_field(base, IRQ_SRCS_MSK, (1 << pipe), 1);
+
+ bam_write_reg(base, P_IRQ_EN(pipe), param->pipe_irq_mask);
+
+ bam_write_reg_field(base, P_CTRL(pipe), P_DIRECTION, param->dir);
+ bam_write_reg_field(base, P_CTRL(pipe), P_SYS_MODE, param->mode);
+
+ bam_write_reg(base, P_EVNT_GEN_TRSHLD(pipe), param->event_threshold);
+
+ bam_write_reg(base, P_DESC_FIFO_ADDR(pipe), param->desc_base);
+ bam_write_reg_field(base, P_FIFO_SIZES(pipe), P_DESC_FIFO_SIZE,
+ param->desc_size);
+
+ bam_write_reg_field(base, P_CTRL(pipe), P_SYS_STRM,
+ param->stream_mode);
+
+ if (param->mode == BAM_PIPE_MODE_BAM2BAM) {
+ u32 peer_dest_addr = param->peer_phys_addr +
+ P_EVNT_REG(param->peer_pipe);
+
+ bam_write_reg(base, P_DATA_FIFO_ADDR(pipe),
+ param->data_base);
+ bam_write_reg_field(base, P_FIFO_SIZES(pipe),
+ P_DATA_FIFO_SIZE, param->data_size);
+
+ bam_write_reg(base, P_EVNT_DEST_ADDR(pipe), peer_dest_addr);
+
+ pr_debug("bam:Bam=0x%x.Pipe=%d.peer_bam=0x%x.peer_pipe=%d.\n",
+ (u32) base, pipe,
+ (u32) param->peer_phys_addr,
+ param->peer_pipe);
+ }
+
+ /* Pipe Enable - at last */
+ bam_write_reg_field(base, P_CTRL(pipe), P_EN, 1);
+
+ return 0;
+}
+
+/**
+ * Reset the BAM pipe
+ *
+ */
+void bam_pipe_exit(void *base, u32 pipe, u32 ee)
+{
+ bam_write_reg(base, P_IRQ_EN(pipe), 0);
+
+ /* Disable the Pipe Interrupt at the BAM level */
+ bam_write_reg_field(base, IRQ_SRCS_MSK, (1 << pipe), 0);
+
+ /* Pipe Disable */
+ bam_write_reg_field(base, P_CTRL(pipe), P_EN, 0);
+}
+
+/**
+ * Enable a BAM pipe
+ *
+ */
+void bam_pipe_enable(void *base, u32 pipe)
+{
+ bam_write_reg_field(base, P_CTRL(pipe), P_EN, 1);
+}
+
+/**
+ * Diasble a BAM pipe
+ *
+ */
+void bam_pipe_disable(void *base, u32 pipe)
+{
+ bam_write_reg_field(base, P_CTRL(pipe), P_EN, 0);
+}
+
+/**
+ * Check if a BAM pipe is enabled.
+ *
+ */
+int bam_pipe_is_enabled(void *base, u32 pipe)
+{
+ return bam_read_reg_field(base, P_CTRL(pipe), P_EN);
+}
+
+/**
+ * Configure interrupt for a BAM pipe
+ *
+ */
+void bam_pipe_set_irq(void *base, u32 pipe, enum bam_enable irq_en,
+ u32 src_mask, u32 ee)
+{
+ bam_write_reg(base, P_IRQ_EN(pipe), src_mask);
+ bam_write_reg_field(base, IRQ_SRCS_MSK, (1 << pipe), irq_en);
+}
+
+/**
+ * Configure a BAM pipe for satellite MTI use
+ *
+ */
+void bam_pipe_satellite_mti(void *base, u32 pipe, u32 irq_gen_addr, u32 ee)
+{
+ bam_write_reg(base, P_IRQ_EN(pipe), 0);
+ bam_write_reg(base, P_IRQ_DEST_ADDR(pipe), irq_gen_addr);
+
+ bam_write_reg_field(base, IRQ_SIC_SEL, (1 << pipe), 1);
+ bam_write_reg_field(base, IRQ_SRCS_MSK, (1 << pipe), 1);
+}
+
+/**
+ * Configure MTI for a BAM pipe
+ *
+ */
+void bam_pipe_set_mti(void *base, u32 pipe, enum bam_enable irq_en,
+ u32 src_mask, u32 irq_gen_addr)
+{
+ /*
+ * MTI use is only supported on BAMs when global config is controlled
+ * by a remote processor.
+ * Consequently, the global configuration register to enable SIC (MTI)
+ * support cannot be accessed.
+ * The remote processor must be relied upon to enable the SIC and the
+ * interrupt. Since the remote processor enable both SIC and interrupt,
+ * the interrupt enable mask must be set to zero for polling mode.
+ */
+
+ bam_write_reg(base, P_IRQ_DEST_ADDR(pipe), irq_gen_addr);
+
+ if (!irq_en)
+ src_mask = 0;
+
+ bam_write_reg(base, P_IRQ_EN(pipe), src_mask);
+}
+
+/**
+ * Get and Clear BAM pipe IRQ status
+ *
+ */
+u32 bam_pipe_get_and_clear_irq_status(void *base, u32 pipe)
+{
+ u32 status = 0;
+
+ status = bam_read_reg(base, P_IRQ_STTS(pipe));
+ bam_write_reg(base, P_IRQ_CLR(pipe), status);
+
+ return status;
+}
+
+/**
+ * Set write offset for a BAM pipe
+ *
+ */
+void bam_pipe_set_desc_write_offset(void *base, u32 pipe, u32 next_write)
+{
+ /*
+ * It is not necessary to perform a read-modify-write masking to write
+ * the P_DESC_FIFO_PEER_OFST value, since the other field in the
+ * register (P_BYTES_CONSUMED) is read-only.
+ */
+ bam_write_reg_field(base, P_EVNT_REG(pipe), P_DESC_FIFO_PEER_OFST,
+ next_write);
+}
+
+/**
+ * Get write offset for a BAM pipe
+ *
+ */
+u32 bam_pipe_get_desc_write_offset(void *base, u32 pipe)
+{
+ return bam_read_reg_field(base, P_EVNT_REG(pipe),
+ P_DESC_FIFO_PEER_OFST);
+}
+
+/**
+ * Get read offset for a BAM pipe
+ *
+ */
+u32 bam_pipe_get_desc_read_offset(void *base, u32 pipe)
+{
+ return bam_read_reg_field(base, P_SW_OFSTS(pipe), SW_DESC_OFST);
+}
+
+/**
+ * Configure inactivity timer count for a BAM pipe
+ *
+ */
+void bam_pipe_timer_config(void *base, u32 pipe, enum bam_pipe_timer_mode mode,
+ u32 timeout_count)
+{
+ bam_write_reg_field(base, P_TIMER_CTRL(pipe), P_TIMER_MODE, mode);
+ bam_write_reg_field(base, P_TIMER_CTRL(pipe), P_TIMER_TRSHLD,
+ timeout_count);
+}
+
+/**
+ * Reset inactivity timer for a BAM pipe
+ *
+ */
+void bam_pipe_timer_reset(void *base, u32 pipe)
+{
+ /* reset */
+ bam_write_reg_field(base, P_TIMER_CTRL(pipe), P_TIMER_RST, 0);
+ /* active */
+ bam_write_reg_field(base, P_TIMER_CTRL(pipe), P_TIMER_RST, 1);
+}
+
+/**
+ * Get inactivity timer count for a BAM pipe
+ *
+ */
+u32 bam_pipe_timer_get_count(void *base, u32 pipe)
+{
+ return bam_read_reg(base, P_TIMER(pipe));
+}
diff --git a/arch/arm/mach-msm/sps/bam.h b/arch/arm/mach-msm/sps/bam.h
new file mode 100644
index 0000000..5681f96
--- /dev/null
+++ b/arch/arm/mach-msm/sps/bam.h
@@ -0,0 +1,375 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Bus-Access-Manager (BAM) Hardware manager functions API. */
+
+#ifndef _BAM_H_
+#define _BAM_H_
+
+#include <linux/types.h> /* u32 */
+#include <linux/io.h> /* ioread32() */
+#include <linux/bitops.h> /* find_first_bit() */
+
+/* Pipe mode */
+enum bam_pipe_mode {
+ BAM_PIPE_MODE_BAM2BAM = 0, /* BAM to BAM */
+ BAM_PIPE_MODE_SYSTEM = 1, /* BAM to/from System Memory */
+};
+
+/* Pipe direction */
+enum bam_pipe_dir {
+ /* The Pipe Reads data from data-fifo or system-memory */
+ BAM_PIPE_CONSUMER = 0,
+ /* The Pipe Writes data to data-fifo or system-memory */
+ BAM_PIPE_PRODUCER = 1,
+};
+
+/* Stream mode Type */
+enum bam_stream_mode {
+ BAM_STREAM_MODE_DISABLE = 0,
+ BAM_STREAM_MODE_ENABLE = 1,
+};
+
+/* Enable Type */
+enum bam_enable {
+ BAM_DISABLE = 0,
+ BAM_ENABLE = 1,
+};
+
+/* Pipe timer mode */
+enum bam_pipe_timer_mode {
+ BAM_PIPE_TIMER_ONESHOT = 0,
+ BAM_PIPE_TIMER_PERIODIC = 1,
+};
+
+struct transfer_descriptor {
+ u32 addr; /* Buffer physical address */
+ u32 size:16; /* Buffer size in bytes */
+ u32 flags:16; /* Flag bitmask (see SPS_IOVEC_FLAG_ #defines) */
+} __packed;
+
+/* BAM pipe initialization parameters */
+struct bam_pipe_parameters {
+ u16 event_threshold;
+ u32 pipe_irq_mask;
+ enum bam_pipe_dir dir;
+ enum bam_pipe_mode mode;
+ u32 desc_base; /* Physical address of descriptor FIFO */
+ u32 desc_size; /* Size (bytes) of descriptor FIFO */
+ enum bam_stream_mode stream_mode;
+ u32 ee; /* BAM execution environment index */
+
+ /* The following are only valid if mode is BAM2BAM */
+ u32 peer_phys_addr;
+ u32 peer_pipe;
+ u32 data_base; /* Physical address of data FIFO */
+ u32 data_size; /* Size (bytes) of data FIFO */
+};
+
+/**
+ * Initialize a BAM device
+ *
+ * This function initializes a BAM device.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @ee - BAM execution environment index
+ *
+ * @summing_threshold - summing threshold (global for all pipes)
+ *
+ * @irq_mask - error interrupts mask
+ *
+ * @version - return BAM hardware version
+ *
+ * @num_pipes - return number of pipes
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int bam_init(void *base,
+ u32 ee,
+ u16 summing_threshold,
+ u32 irq_mask, u32 *version, u32 *num_pipes);
+
+/**
+ * Check a BAM device
+ *
+ * This function verifies that a BAM device is enabled and gathers
+ * the hardware configuration.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @version - return BAM hardware version
+ *
+ * @num_pipes - return number of pipes
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int bam_check(void *base, u32 *version, u32 *num_pipes);
+
+/**
+ * Disable a BAM device
+ *
+ * This function disables a BAM device.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @ee - BAM execution environment index
+ *
+ */
+void bam_exit(void *base, u32 ee);
+
+/**
+ * Get and Clear BAM global IRQ status
+ *
+ * This function gets and clears BAM global IRQ status.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @ee - BAM execution environment index
+ *
+ * @mask - active pipes mask.
+ *
+ * @return IRQ status
+ *
+ */
+u32 bam_get_and_clear_irq_status(void *base, u32 ee, u32 mask);
+
+/**
+ * Initialize a BAM pipe
+ *
+ * This function initializes a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @param - bam pipe parameters.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int bam_pipe_init(void *base, u32 pipe, struct bam_pipe_parameters *param);
+
+/**
+ * Reset the BAM pipe
+ *
+ * This function resets the BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @ee - BAM execution environment index
+ *
+ */
+void bam_pipe_exit(void *base, u32 pipe, u32 ee);
+
+/**
+ * Enable a BAM pipe
+ *
+ * This function enables a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ */
+void bam_pipe_enable(void *base, u32 pipe);
+
+/**
+ * Disable a BAM pipe
+ *
+ * This function disables a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ */
+void bam_pipe_disable(void *base, u32 pipe);
+
+/**
+ * Get a BAM pipe enable state
+ *
+ * This function determines if a BAM pipe is enabled.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @return true if enabled, false if disabled
+ *
+ */
+int bam_pipe_is_enabled(void *base, u32 pipe);
+
+/**
+ * Configure interrupt for a BAM pipe
+ *
+ * This function configures the interrupt for a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @irq_en - enable or disable interrupt
+ *
+ * @src_mask - interrupt source mask, set regardless of whether
+ * interrupt is disabled
+ *
+ * @ee - BAM execution environment index
+ *
+ */
+void bam_pipe_set_irq(void *base, u32 pipe, enum bam_enable irq_en,
+ u32 src_mask, u32 ee);
+
+/**
+ * Configure a BAM pipe for satellite MTI use
+ *
+ * This function configures a BAM pipe for satellite MTI use.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @irq_gen_addr - physical address written to generate MTI
+ *
+ * @ee - BAM execution environment index
+ *
+ */
+void bam_pipe_satellite_mti(void *base, u32 pipe, u32 irq_gen_addr, u32 ee);
+
+/**
+ * Configure MTI for a BAM pipe
+ *
+ * This function configures the interrupt for a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @irq_en - enable or disable interrupt
+ *
+ * @src_mask - interrupt source mask, set regardless of whether
+ * interrupt is disabled
+ *
+ * @irq_gen_addr - physical address written to generate MTI
+ *
+ */
+void bam_pipe_set_mti(void *base, u32 pipe, enum bam_enable irq_en,
+ u32 src_mask, u32 irq_gen_addr);
+
+/**
+ * Get and Clear BAM pipe IRQ status
+ *
+ * This function gets and clears BAM pipe IRQ status.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @return IRQ status
+ *
+ */
+u32 bam_pipe_get_and_clear_irq_status(void *base, u32 pipe);
+
+/**
+ * Set write offset for a BAM pipe
+ *
+ * This function sets the write offset for a BAM pipe. This is
+ * the offset that is maintained by software in system mode.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @next_write - descriptor FIFO write offset
+ *
+ */
+void bam_pipe_set_desc_write_offset(void *base, u32 pipe, u32 next_write);
+
+/**
+ * Get write offset for a BAM pipe
+ *
+ * This function gets the write offset for a BAM pipe. This is
+ * the offset that is maintained by the pipe's peer pipe or by software.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @return descriptor FIFO write offset
+ *
+ */
+u32 bam_pipe_get_desc_write_offset(void *base, u32 pipe);
+
+/**
+ * Get read offset for a BAM pipe
+ *
+ * This function gets the read offset for a BAM pipe. This is
+ * the offset that is maintained by the pipe in system mode.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @return descriptor FIFO read offset
+ *
+ */
+u32 bam_pipe_get_desc_read_offset(void *base, u32 pipe);
+
+/**
+ * Configure inactivity timer count for a BAM pipe
+ *
+ * This function configures the inactivity timer count for a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @mode - timer operating mode
+ *
+ * @timeout_count - timeout count
+ *
+ */
+void bam_pipe_timer_config(void *base, u32 pipe,
+ enum bam_pipe_timer_mode mode,
+ u32 timeout_count);
+
+/**
+ * Reset inactivity timer for a BAM pipe
+ *
+ * This function resets the inactivity timer count for a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ */
+void bam_pipe_timer_reset(void *base, u32 pipe);
+
+/**
+ * Get inactivity timer count for a BAM pipe
+ *
+ * This function gets the inactivity timer count for a BAM pipe.
+ *
+ * @base - BAM virtual base address.
+ *
+ * @pipe - pipe index
+ *
+ * @return inactivity timer count
+ *
+ */
+u32 bam_pipe_timer_get_count(void *base, u32 pipe);
+
+#endif /* _BAM_H_ */
diff --git a/arch/arm/mach-msm/sps/sps.c b/arch/arm/mach-msm/sps/sps.c
new file mode 100644
index 0000000..f288958
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps.c
@@ -0,0 +1,1359 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Smart-Peripheral-Switch (SPS) Module. */
+
+#include <linux/types.h> /* u32 */
+#include <linux/kernel.h> /* pr_info() */
+#include <linux/module.h> /* module_init() */
+#include <linux/slab.h> /* kzalloc() */
+#include <linux/mutex.h> /* mutex */
+#include <linux/device.h> /* device */
+#include <linux/fs.h> /* alloc_chrdev_region() */
+#include <linux/list.h> /* list_head */
+#include <linux/memory.h> /* memset */
+#include <linux/io.h> /* ioremap() */
+#include <linux/clk.h> /* clk_enable() */
+#include <linux/platform_device.h> /* platform_get_resource_byname() */
+
+#include <mach/msm_sps.h> /* msm_sps_platform_data */
+
+#include "sps_bam.h"
+#include "spsi.h"
+#include "sps_core.h"
+
+#define DRV_NAME "sps"
+
+/**
+ * SPS Driver state struct
+ */
+struct sps_drv {
+ struct class *dev_class;
+ dev_t dev_num;
+ struct device *dev;
+ struct clk *pmem_clk;
+ struct clk *bamdma_clk;
+ struct clk *dfab_clk;
+
+ int is_ready;
+
+ /* Platform data */
+ u32 pipemem_phys_base;
+ u32 pipemem_size;
+ u32 bamdma_bam_phys_base;
+ u32 bamdma_bam_size;
+ u32 bamdma_dma_phys_base;
+ u32 bamdma_dma_size;
+ u32 bamdma_irq;
+ u32 bamdma_restricted_pipes;
+
+ /* Driver options bitflags (see SPS_OPT_*) */
+ u32 options;
+
+ /* Mutex to protect BAM and connection queues */
+ struct mutex lock;
+
+ /* BAM devices */
+ struct list_head bams_q;
+
+ char *hal_bam_version;
+
+ /* Connection control state */
+ struct sps_rm connection_ctrl;
+};
+
+
+/**
+ * SPS driver state
+ */
+static struct sps_drv *sps;
+
+static void sps_device_de_init(void);
+
+/**
+ * Initialize SPS device
+ *
+ * This function initializes the SPS device.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_device_init(void)
+{
+ int result;
+ int success;
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ struct sps_bam_props bamdma_props = {0};
+#endif
+
+ SPS_DBG("sps_device_init");
+
+ success = false;
+
+ result = sps_mem_init(sps->pipemem_phys_base, sps->pipemem_size);
+ if (result) {
+ SPS_ERR("SPS memory init failed");
+ goto exit_err;
+ }
+
+ INIT_LIST_HEAD(&sps->bams_q);
+ mutex_init(&sps->lock);
+
+ if (sps_rm_init(&sps->connection_ctrl, sps->options)) {
+ SPS_ERR("Failed to init SPS resource manager");
+ goto exit_err;
+ }
+
+ result = sps_bam_driver_init(sps->options);
+ if (result) {
+ SPS_ERR("SPS BAM driver init failed");
+ goto exit_err;
+ }
+
+ /* Initialize the BAM DMA device */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ bamdma_props.phys_addr = sps->bamdma_bam_phys_base;
+ bamdma_props.virt_addr = ioremap(sps->bamdma_bam_phys_base,
+ sps->bamdma_bam_size);
+
+ if (!bamdma_props.virt_addr) {
+ SPS_ERR("sps:Failed to IO map BAM-DMA BAM registers.\n");
+ goto exit_err;
+ }
+
+ SPS_DBG("sps:bamdma_bam.phys=0x%x.virt=0x%x.",
+ bamdma_props.phys_addr,
+ (u32) bamdma_props.virt_addr);
+
+ bamdma_props.periph_phys_addr = sps->bamdma_dma_phys_base;
+ bamdma_props.periph_virt_size = sps->bamdma_dma_size;
+ bamdma_props.periph_virt_addr = ioremap(sps->bamdma_dma_phys_base,
+ sps->bamdma_dma_size);
+
+ if (!bamdma_props.periph_virt_addr) {
+ SPS_ERR("sps:Failed to IO map BAM-DMA peripheral reg.\n");
+ goto exit_err;
+ }
+
+ SPS_DBG("sps:bamdma_dma.phys=0x%x.virt=0x%x.",
+ bamdma_props.periph_phys_addr,
+ (u32) bamdma_props.periph_virt_addr);
+
+ bamdma_props.irq = sps->bamdma_irq;
+
+ bamdma_props.event_threshold = 0x10; /* Pipe event threshold */
+ bamdma_props.summing_threshold = 0x10; /* BAM event threshold */
+
+ bamdma_props.options = SPS_BAM_OPT_BAMDMA;
+ bamdma_props.restricted_pipes = sps->bamdma_restricted_pipes;
+
+ result = sps_dma_init(&bamdma_props);
+ if (result) {
+ SPS_ERR("SPS BAM DMA driver init failed");
+ goto exit_err;
+ }
+#endif /* CONFIG_SPS_SUPPORT_BAMDMA */
+
+ result = sps_map_init(NULL, sps->options);
+ if (result) {
+ SPS_ERR("SPS connection mapping init failed");
+ goto exit_err;
+ }
+
+ success = true;
+exit_err:
+ if (!success) {
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ sps_device_de_init();
+#endif
+ return SPS_ERROR;
+ }
+
+ return 0;
+}
+
+/**
+ * De-initialize SPS device
+ *
+ * This function de-initializes the SPS device.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static void sps_device_de_init(void)
+{
+ SPS_DBG("%s.", __func__);
+
+ if (sps != NULL) {
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ sps_dma_de_init();
+#endif
+ /* Are there any remaining BAM registrations? */
+ if (!list_empty(&sps->bams_q))
+ SPS_ERR("SPS de-init: BAMs are still registered");
+
+ sps_map_de_init();
+
+ kfree(sps);
+ }
+
+ sps_mem_de_init();
+}
+
+/**
+ * Initialize client state context
+ *
+ * This function initializes a client state context struct.
+ *
+ * @client - Pointer to client state context
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_client_init(struct sps_pipe *client)
+{
+ if (client == NULL)
+ return -EINVAL;
+
+ /*
+ * NOTE: Cannot store any state within the SPS driver because
+ * the driver init function may not have been called yet.
+ */
+ memset(client, 0, sizeof(*client));
+ sps_rm_config_init(&client->connect);
+
+ client->client_state = SPS_STATE_DISCONNECT;
+ client->bam = NULL;
+
+ return 0;
+}
+
+/**
+ * De-initialize client state context
+ *
+ * This function de-initializes a client state context struct.
+ *
+ * @client - Pointer to client state context
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_client_de_init(struct sps_pipe *client)
+{
+ if (client->client_state != SPS_STATE_DISCONNECT) {
+ SPS_ERR("De-init client in connected state: 0x%x",
+ client->client_state);
+ return SPS_ERROR;
+ }
+
+ client->bam = NULL;
+ client->map = NULL;
+ memset(&client->connect, 0, sizeof(client->connect));
+
+ return 0;
+}
+
+/**
+ * Find the BAM device from the physical address
+ *
+ * This function finds a BAM device in the BAM registration list that
+ * matches the specified physical address.
+ *
+ * @phys_addr - physical address of the BAM
+ *
+ * @return - pointer to the BAM device struct, or NULL on error
+ *
+ */
+static struct sps_bam *phy2bam(u32 phys_addr)
+{
+ struct sps_bam *bam;
+
+ list_for_each_entry(bam, &sps->bams_q, list) {
+ if (bam->props.phys_addr == phys_addr)
+ return bam;
+ }
+
+ return NULL;
+}
+
+/**
+ * Find the BAM device from the handle
+ *
+ * This function finds a BAM device in the BAM registration list that
+ * matches the specified device handle.
+ *
+ * @h - device handle of the BAM
+ *
+ * @return - pointer to the BAM device struct, or NULL on error
+ *
+ */
+struct sps_bam *sps_h2bam(u32 h)
+{
+ struct sps_bam *bam;
+
+ if (h == SPS_DEV_HANDLE_MEM || h == SPS_DEV_HANDLE_INVALID)
+ return NULL;
+
+ list_for_each_entry(bam, &sps->bams_q, list) {
+ if ((u32) bam == (u32) h)
+ return bam;
+ }
+
+ SPS_ERR("Can't find BAM device for handle 0x%x.", h);
+
+ return NULL;
+}
+
+/**
+ * Lock BAM device
+ *
+ * This function obtains the BAM mutex on the client's connection.
+ *
+ * @pipe - pointer to client pipe state
+ *
+ * @return pointer to BAM device struct, or NULL on error
+ *
+ */
+static struct sps_bam *sps_bam_lock(struct sps_pipe *pipe)
+{
+ struct sps_bam *bam;
+ u32 pipe_index;
+
+ bam = pipe->bam;
+ if (bam == NULL) {
+ SPS_ERR("Connection not in connected state");
+ return NULL;
+ }
+
+ mutex_lock(&bam->lock);
+
+ /* Verify client owns this pipe */
+ pipe_index = pipe->pipe_index;
+ if (pipe_index >= bam->props.num_pipes ||
+ pipe != bam->pipes[pipe_index]) {
+ SPS_ERR("Client not owner of BAM 0x%x pipe: %d (max %d)",
+ bam->props.phys_addr, pipe_index,
+ bam->props.num_pipes);
+ mutex_unlock(&bam->lock);
+ return NULL;
+ }
+
+ return bam;
+}
+
+/**
+ * Unlock BAM device
+ *
+ * This function releases the BAM mutex on the client's connection.
+ *
+ * @bam - pointer to BAM device struct
+ *
+ */
+static inline void sps_bam_unlock(struct sps_bam *bam)
+{
+ mutex_unlock(&bam->lock);
+}
+
+/**
+ * Connect an SPS connection end point
+ *
+ */
+int sps_connect(struct sps_pipe *h, struct sps_connect *connect)
+{
+ struct sps_pipe *pipe = h;
+ u32 dev;
+ struct sps_bam *bam;
+ int result;
+
+ if (sps == NULL)
+ return -ENODEV;
+
+ if (!sps->is_ready) {
+ SPS_ERR("sps_connect.sps driver not ready.\n");
+ return -EAGAIN;
+ }
+
+ SPS_DBG("sps_connect: src 0x%x dest 0x%x mode %s",
+ connect->source,
+ connect->destination,
+ connect->mode == SPS_MODE_SRC ? "SRC" : "DEST");
+
+ mutex_lock(&sps->lock);
+ /*
+ * Must lock the BAM device at the top level function, so must
+ * determine which BAM is the target for the connection
+ */
+ if (connect->mode == SPS_MODE_SRC)
+ dev = connect->source;
+ else
+ dev = connect->destination;
+
+ bam = sps_h2bam(dev);
+ if (bam == NULL) {
+ SPS_ERR("Invalid BAM device handle: 0x%x", dev);
+ result = SPS_ERROR;
+ goto exit_err;
+ }
+
+ /* Allocate resources for the specified connection */
+ pipe->connect = *connect;
+ mutex_lock(&bam->lock);
+ result = sps_rm_state_change(pipe, SPS_STATE_ALLOCATE);
+ mutex_unlock(&bam->lock);
+ if (result)
+ goto exit_err;
+
+ /* Configure the connection */
+ mutex_lock(&bam->lock);
+ result = sps_rm_state_change(pipe, SPS_STATE_CONNECT);
+ mutex_unlock(&bam->lock);
+ if (result) {
+ sps_disconnect(h);
+ goto exit_err;
+ }
+
+exit_err:
+ mutex_unlock(&sps->lock);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_connect);
+
+/**
+ * Disconnect an SPS connection end point
+ *
+ * This function disconnects an SPS connection end point.
+ * The SPS hardware associated with that end point will be disabled.
+ * For a connection involving system memory (SPS_DEV_HANDLE_MEM), all
+ * connection resources are deallocated. For a peripheral-to-peripheral
+ * connection, the resources associated with the connection will not be
+ * deallocated until both end points are closed.
+ *
+ * The client must call sps_connect() for the handle before calling
+ * this function.
+ *
+ * @h - client context for SPS connection end point
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_disconnect(struct sps_pipe *h)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_pipe *check;
+ struct sps_bam *bam;
+ int result;
+
+ if (pipe == NULL)
+ return SPS_ERROR;
+
+ SPS_DBG("sps_disconnect: src 0x%x dest 0x%x mode %s",
+ pipe->connect.source,
+ pipe->connect.destination,
+ pipe->connect.mode == SPS_MODE_SRC ? "SRC" : "DEST");
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = SPS_ERROR;
+ /* Cross-check client with map table */
+ if (pipe->connect.mode == SPS_MODE_SRC)
+ check = pipe->map->client_src;
+ else
+ check = pipe->map->client_dest;
+
+ if (check != pipe) {
+ SPS_ERR("Client context is corrupt");
+ goto exit_err;
+ }
+
+ /* Disconnect the BAM pipe */
+ result = sps_rm_state_change(pipe, SPS_STATE_DISCONNECT);
+ if (result)
+ goto exit_err;
+
+ sps_rm_config_init(&pipe->connect);
+ result = 0;
+
+exit_err:
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_disconnect);
+
+/**
+ * Register an event object for an SPS connection end point
+ *
+ */
+int sps_register_event(struct sps_pipe *h, struct sps_register_event *reg)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ if (sps == NULL)
+ return -ENODEV;
+
+ if (!sps->is_ready) {
+ SPS_ERR("sps_connect.sps driver not ready.\n");
+ return -EAGAIN;
+ }
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_pipe_reg_event(bam, pipe->pipe_index, reg);
+ sps_bam_unlock(bam);
+ if (result)
+ SPS_ERR("Failed to register event for BAM 0x%x pipe %d",
+ pipe->bam->props.phys_addr, pipe->pipe_index);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_register_event);
+
+/**
+ * Enable an SPS connection end point
+ *
+ */
+int sps_flow_on(struct sps_pipe *h)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ /* Enable the pipe data flow */
+ result = sps_rm_state_change(pipe, SPS_STATE_ENABLE);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_flow_on);
+
+/**
+ * Disable an SPS connection end point
+ *
+ */
+int sps_flow_off(struct sps_pipe *h, enum sps_flow_off mode)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ /* Disable the pipe data flow */
+ result = sps_rm_state_change(pipe, SPS_STATE_DISABLE);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_flow_off);
+
+/**
+ * Perform a DMA transfer on an SPS connection end point
+ *
+ */
+int sps_transfer(struct sps_pipe *h, struct sps_transfer *transfer)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_pipe_transfer(bam, pipe->pipe_index, transfer);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_transfer);
+
+/**
+ * Perform a single DMA transfer on an SPS connection end point
+ *
+ */
+int sps_transfer_one(struct sps_pipe *h, u32 addr, u32 size,
+ void *user, u32 flags)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_pipe_transfer_one(bam, pipe->pipe_index,
+ addr, size, user, flags);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_transfer_one);
+
+/**
+ * Read event queue for an SPS connection end point
+ *
+ */
+int sps_get_event(struct sps_pipe *h, struct sps_event_notify *notify)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_pipe_get_event(bam, pipe->pipe_index, notify);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_get_event);
+
+/**
+ * Determine whether an SPS connection end point FIFO is empty
+ *
+ */
+int sps_is_pipe_empty(struct sps_pipe *h, u32 *empty)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_pipe_is_empty(bam, pipe->pipe_index, empty);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_is_pipe_empty);
+
+/**
+ * Get number of free transfer entries for an SPS connection end point
+ *
+ */
+int sps_get_free_count(struct sps_pipe *h, u32 *count)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_get_free_count(bam, pipe->pipe_index, count);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_get_free_count);
+
+/**
+ * Reset an SPS BAM device
+ *
+ */
+int sps_device_reset(u32 dev)
+{
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s: dev = 0x%x", __func__, dev);
+
+ mutex_lock(&sps->lock);
+ /* Search for the target BAM device */
+ bam = sps_h2bam(dev);
+ if (bam == NULL) {
+ SPS_ERR("Invalid BAM device handle: 0x%x", dev);
+ result = SPS_ERROR;
+ goto exit_err;
+ }
+
+ mutex_lock(&bam->lock);
+ result = sps_bam_reset(bam);
+ mutex_unlock(&bam->lock);
+ if (result) {
+ SPS_ERR("Failed to reset BAM device: 0x%x", dev);
+ goto exit_err;
+ }
+
+exit_err:
+ mutex_unlock(&sps->lock);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_device_reset);
+
+/**
+ * Get the configuration parameters for an SPS connection end point
+ *
+ */
+int sps_get_config(struct sps_pipe *h, struct sps_connect *config)
+{
+ struct sps_pipe *pipe = h;
+
+ if (config == NULL) {
+ SPS_ERR("Config pointer is NULL");
+ return SPS_ERROR;
+ }
+
+ /* Copy current client connection state */
+ *config = pipe->connect;
+
+ return 0;
+}
+EXPORT_SYMBOL(sps_get_config);
+
+/**
+ * Set the configuration parameters for an SPS connection end point
+ *
+ */
+int sps_set_config(struct sps_pipe *h, struct sps_connect *config)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_pipe_set_params(bam, pipe->pipe_index,
+ config->options);
+ if (result == 0)
+ pipe->connect.options = config->options;
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_set_config);
+
+/**
+ * Set ownership of an SPS connection end point
+ *
+ */
+int sps_set_owner(struct sps_pipe *h, enum sps_owner owner,
+ struct sps_satellite *connect)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ if (owner != SPS_OWNER_REMOTE) {
+ SPS_ERR("Unsupported ownership state: %d", owner);
+ return SPS_ERROR;
+ }
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ result = sps_bam_set_satellite(bam, pipe->pipe_index);
+ if (result)
+ goto exit_err;
+
+ /* Return satellite connect info */
+ if (connect == NULL)
+ goto exit_err;
+
+ if (pipe->connect.mode == SPS_MODE_SRC) {
+ connect->dev = pipe->map->src.bam_phys;
+ connect->pipe_index = pipe->map->src.pipe_index;
+ } else {
+ connect->dev = pipe->map->dest.bam_phys;
+ connect->pipe_index = pipe->map->dest.pipe_index;
+ }
+ connect->config = SPS_CONFIG_SATELLITE;
+ connect->options = (enum sps_option) 0;
+
+exit_err:
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_set_owner);
+
+/**
+ * Allocate memory from the SPS Pipe-Memory.
+ *
+ */
+int sps_alloc_mem(struct sps_pipe *h, enum sps_mem mem,
+ struct sps_mem_buffer *mem_buffer)
+{
+ if (sps == NULL)
+ return -ENODEV;
+
+ if (!sps->is_ready) {
+ SPS_ERR("sps_alloc_mem.sps driver not ready.\n");
+ return -EAGAIN;
+ }
+
+ if (mem_buffer == NULL || mem_buffer->size == 0)
+ return SPS_ERROR;
+
+ mem_buffer->phys_base = sps_mem_alloc_io(mem_buffer->size);
+ if (mem_buffer->phys_base == SPS_ADDR_INVALID)
+ return SPS_ERROR;
+
+ mem_buffer->base = spsi_get_mem_ptr(mem_buffer->phys_base);
+
+ return 0;
+}
+EXPORT_SYMBOL(sps_alloc_mem);
+
+/**
+ * Free memory from the SPS Pipe-Memory.
+ *
+ */
+int sps_free_mem(struct sps_pipe *h, struct sps_mem_buffer *mem_buffer)
+{
+ if (mem_buffer == NULL || mem_buffer->phys_base == SPS_ADDR_INVALID)
+ return SPS_ERROR;
+
+ sps_mem_free_io(mem_buffer->phys_base, mem_buffer->size);
+
+ return 0;
+}
+EXPORT_SYMBOL(sps_free_mem);
+
+/**
+ * Register a BAM device
+ *
+ */
+int sps_register_bam_device(const struct sps_bam_props *bam_props,
+ u32 *dev_handle)
+{
+ struct sps_bam *bam = NULL;
+ void *virt_addr = NULL;
+ u32 manage;
+ int ok;
+ int result;
+
+ if (sps == NULL)
+ return SPS_ERROR;
+
+ /* BAM-DMA is registered internally during power-up */
+ if ((!sps->is_ready) && !(bam_props->options & SPS_BAM_OPT_BAMDMA)) {
+ SPS_ERR("sps_register_bam_device.sps driver not ready.\n");
+ return -EAGAIN;
+ }
+
+ if (bam_props == NULL || dev_handle == NULL)
+ return SPS_ERROR;
+
+ /* Check BAM parameters */
+ manage = bam_props->manage & SPS_BAM_MGR_ACCESS_MASK;
+ if (manage != SPS_BAM_MGR_NONE) {
+ if (bam_props->virt_addr == NULL && bam_props->virt_size == 0) {
+ SPS_ERR("Invalid properties for BAM: %x",
+ bam_props->phys_addr);
+ return SPS_ERROR;
+ }
+ }
+ if ((bam_props->manage & SPS_BAM_MGR_DEVICE_REMOTE) == 0) {
+ /* BAM global is configured by local processor */
+ if (bam_props->summing_threshold == 0) {
+ SPS_ERR("Invalid device ctrl properties for BAM: %x",
+ bam_props->phys_addr);
+ return SPS_ERROR;
+ }
+ }
+ manage = bam_props->manage &
+ (SPS_BAM_MGR_PIPE_NO_CONFIG | SPS_BAM_MGR_PIPE_NO_CTRL);
+
+ /* In case of error */
+ *dev_handle = SPS_DEV_HANDLE_INVALID;
+ result = SPS_ERROR;
+
+ mutex_lock(&sps->lock);
+ /* Is this BAM already registered? */
+ bam = phy2bam(bam_props->phys_addr);
+ if (bam != NULL) {
+ mutex_unlock(&sps->lock);
+ SPS_ERR("BAM already registered: %x", bam->props.phys_addr);
+ result = -EEXIST;
+ bam = NULL; /* Avoid error clean-up kfree(bam) */
+ goto exit_err;
+ }
+
+ /* Perform virtual mapping if required */
+ if ((bam_props->manage & SPS_BAM_MGR_ACCESS_MASK) !=
+ SPS_BAM_MGR_NONE && bam_props->virt_addr == NULL) {
+ /* Map the memory region */
+ virt_addr = ioremap(bam_props->phys_addr, bam_props->virt_size);
+ if (virt_addr == NULL) {
+ SPS_ERR("Unable to map BAM IO memory: %x %x",
+ bam_props->phys_addr, bam_props->virt_size);
+ goto exit_err;
+ }
+ }
+
+ bam = kzalloc(sizeof(*bam), GFP_KERNEL);
+ if (bam == NULL) {
+ SPS_ERR("Unable to allocate BAM device state: size 0x%x",
+ sizeof(*bam));
+ goto exit_err;
+ }
+ memset(bam, 0, sizeof(*bam));
+
+ mutex_init(&bam->lock);
+ mutex_lock(&bam->lock);
+
+ /* Copy configuration to BAM device descriptor */
+ bam->props = *bam_props;
+ if (virt_addr != NULL)
+ bam->props.virt_addr = virt_addr;
+
+ if ((bam_props->manage & SPS_BAM_MGR_DEVICE_REMOTE) != 0 &&
+ (bam_props->manage & SPS_BAM_MGR_MULTI_EE) != 0 &&
+ bam_props->ee == 0) {
+ /*
+ * BAM global is owned by a remote processor, so force EE index
+ * to a non-zero value to insure EE zero globals are not
+ * modified.
+ */
+ SPS_INFO("Setting EE for BAM %x to non-zero",
+ bam_props->phys_addr);
+ bam->props.ee = 1;
+ }
+
+ ok = sps_bam_device_init(bam);
+ mutex_unlock(&bam->lock);
+ if (ok) {
+ SPS_ERR("Failed to init BAM device: phys 0x%0x",
+ bam->props.phys_addr);
+ goto exit_err;
+ }
+
+ /* Add BAM to the list */
+ list_add_tail(&bam->list, &sps->bams_q);
+ *dev_handle = (u32) bam;
+
+ result = 0;
+exit_err:
+ mutex_unlock(&sps->lock);
+
+ if (result) {
+ if (virt_addr != NULL)
+ iounmap(bam->props.virt_addr);
+
+ if (bam != NULL)
+ kfree(bam);
+
+ return result;
+ }
+
+ /* If this BAM is attached to a BAM-DMA, init the BAM-DMA device */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ if ((bam->props.options & SPS_BAM_OPT_BAMDMA)) {
+ if (sps_dma_device_init((u32) bam)) {
+ bam->props.options &= ~SPS_BAM_OPT_BAMDMA;
+ sps_deregister_bam_device((u32) bam);
+ SPS_ERR("Failed to init BAM-DMA device: BAM phys 0x%0x",
+ bam->props.phys_addr);
+ return SPS_ERROR;
+ }
+ }
+#endif /* CONFIG_SPS_SUPPORT_BAMDMA */
+
+ SPS_DBG("SPS registered BAM: phys 0x%x.", bam->props.phys_addr);
+
+ return 0;
+}
+EXPORT_SYMBOL(sps_register_bam_device);
+
+/**
+ * Deregister a BAM device
+ *
+ */
+int sps_deregister_bam_device(u32 dev_handle)
+{
+ struct sps_bam *bam;
+
+ bam = sps_h2bam(dev_handle);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ SPS_DBG("SPS deregister BAM: phys 0x%x.", bam->props.phys_addr);
+
+ /* If this BAM is attached to a BAM-DMA, init the BAM-DMA device */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ if ((bam->props.options & SPS_BAM_OPT_BAMDMA)) {
+ mutex_lock(&bam->lock);
+ (void)sps_dma_device_de_init((u32) bam);
+ bam->props.options &= ~SPS_BAM_OPT_BAMDMA;
+ mutex_unlock(&bam->lock);
+ }
+#endif
+
+ /* Remove the BAM from the registration list */
+ mutex_lock(&sps->lock);
+ list_del(&bam->list);
+ mutex_unlock(&sps->lock);
+
+ /* De-init the BAM and free resources */
+ mutex_lock(&bam->lock);
+ sps_bam_device_de_init(bam);
+ mutex_unlock(&bam->lock);
+ if (bam->props.virt_size)
+ (void)iounmap(bam->props.virt_addr);
+
+ kfree(bam);
+
+ return 0;
+}
+EXPORT_SYMBOL(sps_deregister_bam_device);
+
+/**
+ * Get processed I/O vector (completed transfers)
+ *
+ */
+int sps_get_iovec(struct sps_pipe *h, struct sps_iovec *iovec)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ if (h == NULL || iovec == NULL)
+ return SPS_ERROR;
+
+ SPS_DBG("%s.", __func__);
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ /* Get an iovec from the BAM pipe descriptor FIFO */
+ result = sps_bam_pipe_get_iovec(bam, pipe->pipe_index, iovec);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_get_iovec);
+
+/**
+ * Perform timer control
+ *
+ */
+int sps_timer_ctrl(struct sps_pipe *h,
+ struct sps_timer_ctrl *timer_ctrl,
+ struct sps_timer_result *timer_result)
+{
+ struct sps_pipe *pipe = h;
+ struct sps_bam *bam;
+ int result;
+
+ SPS_DBG("%s.", __func__);
+
+ if (h == NULL || timer_ctrl == NULL)
+ return SPS_ERROR;
+
+ bam = sps_bam_lock(pipe);
+ if (bam == NULL)
+ return SPS_ERROR;
+
+ /* Perform the BAM pipe timer control operation */
+ result = sps_bam_pipe_timer_ctrl(bam, pipe->pipe_index, timer_ctrl,
+ timer_result);
+ sps_bam_unlock(bam);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_timer_ctrl);
+
+/**
+ * Allocate client state context
+ *
+ */
+struct sps_pipe *sps_alloc_endpoint(void)
+{
+ struct sps_pipe *ctx = NULL;
+
+ ctx = kzalloc(sizeof(struct sps_pipe), GFP_KERNEL);
+ if (ctx == NULL) {
+ SPS_ERR("Allocate pipe context fail.");
+ return NULL;
+ }
+
+ sps_client_init(ctx);
+
+ return ctx;
+}
+EXPORT_SYMBOL(sps_alloc_endpoint);
+
+/**
+ * Free client state context
+ *
+ */
+int sps_free_endpoint(struct sps_pipe *ctx)
+{
+ int res;
+
+ res = sps_client_de_init(ctx);
+
+ if (res == 0)
+ kfree(ctx);
+
+ return res;
+}
+EXPORT_SYMBOL(sps_free_endpoint);
+
+/**
+ * Platform Driver.
+ */
+static int get_platform_data(struct platform_device *pdev)
+{
+ struct resource *resource;
+ struct msm_sps_platform_data *pdata;
+
+ pdata = pdev->dev.platform_data;
+
+ if (pdata == NULL) {
+ SPS_ERR("sps:inavlid platform data.\n");
+ sps->bamdma_restricted_pipes = 0;
+ return -EINVAL;
+ } else {
+ sps->bamdma_restricted_pipes = pdata->bamdma_restricted_pipes;
+ SPS_DBG("sps:bamdma_restricted_pipes=0x%x.",
+ sps->bamdma_restricted_pipes);
+ }
+
+ resource = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "pipe_mem");
+ if (resource) {
+ sps->pipemem_phys_base = resource->start;
+ sps->pipemem_size = resource_size(resource);
+ SPS_DBG("sps:pipemem.base=0x%x,size=0x%x.",
+ sps->pipemem_phys_base,
+ sps->pipemem_size);
+ }
+
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ resource = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "bamdma_bam");
+ if (resource) {
+ sps->bamdma_bam_phys_base = resource->start;
+ sps->bamdma_bam_size = resource_size(resource);
+ SPS_DBG("sps:bamdma_bam.base=0x%x,size=0x%x.",
+ sps->bamdma_bam_phys_base,
+ sps->bamdma_bam_size);
+ }
+
+ resource = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "bamdma_dma");
+ if (resource) {
+ sps->bamdma_dma_phys_base = resource->start;
+ sps->bamdma_dma_size = resource_size(resource);
+ SPS_DBG("sps:bamdma_dma.base=0x%x,size=0x%x.",
+ sps->bamdma_dma_phys_base,
+ sps->bamdma_dma_size);
+ }
+
+ resource = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
+ "bamdma_irq");
+ if (resource) {
+ sps->bamdma_irq = resource->start;
+ SPS_DBG("sps:bamdma_irq=%d.", sps->bamdma_irq);
+ }
+#endif
+
+ return 0;
+}
+
+static int __devinit msm_sps_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ SPS_DBG("sps:msm_sps_probe.");
+
+ ret = get_platform_data(pdev);
+ if (ret)
+ return -ENODEV;
+
+ /* Create Device */
+ sps->dev_class = class_create(THIS_MODULE, DRV_NAME);
+
+ ret = alloc_chrdev_region(&sps->dev_num, 0, 1, DRV_NAME);
+ if (ret) {
+ SPS_ERR("sps:alloc_chrdev_region err.");
+ goto alloc_chrdev_region_err;
+ }
+
+ sps->dev = device_create(sps->dev_class, NULL, sps->dev_num, sps,
+ DRV_NAME);
+ if (IS_ERR(sps->dev)) {
+ SPS_ERR("sps:device_create err.");
+ goto device_create_err;
+ }
+
+ sps->dfab_clk = clk_get(sps->dev, "dfab_clk");
+ if (IS_ERR(sps->dfab_clk)) {
+ SPS_ERR("sps:fail to get dfab_clk.");
+ goto clk_err;
+ } else {
+ ret = clk_enable(sps->dfab_clk);
+ if (ret) {
+ SPS_ERR("sps:failed to enable dfab_clk. ret=%d", ret);
+ goto clk_err;
+ }
+ }
+
+ sps->pmem_clk = clk_get(sps->dev, "pmem_clk");
+ if (IS_ERR(sps->pmem_clk)) {
+ SPS_ERR("sps:fail to get pmem_clk.");
+ goto clk_err;
+ } else {
+ ret = clk_enable(sps->pmem_clk);
+ if (ret) {
+ SPS_ERR("sps:failed to enable pmem_clk. ret=%d", ret);
+ goto clk_err;
+ }
+ }
+
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ sps->bamdma_clk = clk_get(sps->dev, "dma_bam_pclk");
+ if (IS_ERR(sps->bamdma_clk)) {
+ SPS_ERR("sps:fail to get bamdma_clk.");
+ goto clk_err;
+ } else {
+ ret = clk_enable(sps->bamdma_clk);
+ if (ret) {
+ SPS_ERR("sps:failed to enable bamdma_clk. ret=%d", ret);
+ goto clk_err;
+ }
+ }
+#endif
+
+ ret = sps_device_init();
+ if (ret) {
+ SPS_ERR("sps:sps_device_init err.");
+ goto sps_device_init_err;
+ }
+
+ sps->is_ready = true;
+
+ SPS_INFO("sps is ready.");
+
+ return 0;
+clk_err:
+sps_device_init_err:
+ device_destroy(sps->dev_class, sps->dev_num);
+device_create_err:
+ unregister_chrdev_region(sps->dev_num, 1);
+alloc_chrdev_region_err:
+ class_destroy(sps->dev_class);
+
+ return -ENODEV;
+}
+
+static int __devexit msm_sps_remove(struct platform_device *pdev)
+{
+ SPS_DBG("%s.", __func__);
+
+ device_destroy(sps->dev_class, sps->dev_num);
+ unregister_chrdev_region(sps->dev_num, 1);
+ class_destroy(sps->dev_class);
+ sps_device_de_init();
+
+ clk_put(sps->dfab_clk);
+ clk_put(sps->pmem_clk);
+ clk_put(sps->bamdma_clk);
+
+ return 0;
+}
+
+static struct platform_driver msm_sps_driver = {
+ .probe = msm_sps_probe,
+ .driver = {
+ .name = "msm_sps", /* must match the platform_device name */
+ .owner = THIS_MODULE,
+ },
+ .remove = __exit_p(msm_sps_remove),
+};
+
+/**
+ * Module Init.
+ */
+static int __init sps_init(void)
+{
+ int ret;
+
+ SPS_DBG("%s.", __func__);
+
+ /* Allocate the SPS driver state struct */
+ sps = kzalloc(sizeof(*sps), GFP_KERNEL);
+ if (sps == NULL) {
+ SPS_ERR("sps:Unable to allocate driver state context.");
+ return -ENOMEM;
+ }
+
+ ret = platform_driver_register(&msm_sps_driver);
+
+ return ret;
+}
+
+/**
+ * Module Exit.
+ */
+static void __exit sps_exit(void)
+{
+ SPS_DBG("%s.", __func__);
+
+ platform_driver_unregister(&msm_sps_driver);
+
+ if (sps != NULL) {
+ kfree(sps);
+ sps = NULL;
+ }
+}
+
+arch_initcall(sps_init);
+module_exit(sps_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Smart Peripheral Switch (SPS)");
+
diff --git a/arch/arm/mach-msm/sps/sps_bam.c b/arch/arm/mach-msm/sps/sps_bam.c
new file mode 100644
index 0000000..c25b642
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_bam.c
@@ -0,0 +1,1820 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/types.h> /* u32 */
+#include <linux/kernel.h> /* pr_info() */
+#include <linux/mutex.h> /* mutex */
+#include <linux/list.h> /* list_head */
+#include <linux/slab.h> /* kzalloc() */
+#include <linux/interrupt.h> /* request_irq() */
+#include <linux/memory.h> /* memset */
+
+#include "sps_bam.h"
+#include "bam.h"
+#include "spsi.h"
+
+/* All BAM global IRQ sources */
+#define BAM_IRQ_ALL (BAM_DEV_IRQ_HRESP_ERROR | BAM_DEV_IRQ_RDY_TO_SLEEP)
+
+/* BAM device state flags */
+#define BAM_STATE_INIT (1UL << 1)
+#define BAM_STATE_IRQ (1UL << 2)
+#define BAM_STATE_ENABLED (1UL << 3)
+#define BAM_STATE_BAM2BAM (1UL << 4)
+#define BAM_STATE_MTI (1UL << 5)
+#define BAM_STATE_REMOTE (1UL << 6)
+
+/* BAM identifier used in log messages */
+#define BAM_ID(dev) ((dev)->props.phys_addr)
+
+/* Mask for valid hardware descriptor flags */
+#define BAM_IOVEC_FLAG_MASK \
+ (SPS_IOVEC_FLAG_INT | SPS_IOVEC_FLAG_EOT | SPS_IOVEC_FLAG_EOB)
+
+/* Mask for invalid BAM-to-BAM pipe options */
+#define BAM2BAM_O_INVALID \
+ (SPS_O_DESC_DONE | \
+ SPS_O_EOT | \
+ SPS_O_POLL | \
+ SPS_O_NO_Q | \
+ SPS_O_ACK_TRANSFERS)
+
+/**
+ * Pipe/client pointer value indicating pipe is allocated, but no client has
+ * been assigned
+ */
+#define BAM_PIPE_UNASSIGNED ((struct sps_pipe *)0x77777777)
+
+/* Check whether pipe has been assigned */
+#define BAM_PIPE_IS_ASSIGNED(p) \
+ (((p) != NULL) && ((p) != BAM_PIPE_UNASSIGNED))
+
+/* Is MTI use supported for a specific BAM version? */
+#define BAM_VERSION_MTI_SUPPORT(ver) (ver <= 2)
+
+/* Event option<->event translation table entry */
+struct sps_bam_opt_event_table {
+ enum sps_event event_id;
+ enum sps_option option;
+ enum bam_pipe_irq pipe_irq;
+};
+
+static const struct sps_bam_opt_event_table opt_event_table[] = {
+ {SPS_EVENT_EOT, SPS_O_EOT, BAM_PIPE_IRQ_EOT},
+ {SPS_EVENT_DESC_DONE, SPS_O_DESC_DONE, BAM_PIPE_IRQ_DESC_INT},
+ {SPS_EVENT_WAKEUP, SPS_O_WAKEUP, BAM_PIPE_IRQ_WAKE},
+ {SPS_EVENT_INACTIVE, SPS_O_INACTIVE, BAM_PIPE_IRQ_TIMER},
+ {SPS_EVENT_OUT_OF_DESC, SPS_O_OUT_OF_DESC,
+ BAM_PIPE_IRQ_OUT_OF_DESC},
+ {SPS_EVENT_ERROR, SPS_O_ERROR, BAM_PIPE_IRQ_ERROR}
+};
+
+/* Pipe event source handler */
+static void pipe_handler(struct sps_bam *dev,
+ struct sps_pipe *pipe);
+
+/**
+ * Pipe transfer event (EOT, DESC_DONE) source handler.
+ * This function is called by pipe_handler() and other functions to process the
+ * descriptor FIFO.
+ */
+static void pipe_handler_eot(struct sps_bam *dev,
+ struct sps_pipe *pipe);
+
+/**
+ * BAM driver initialization
+ */
+int sps_bam_driver_init(u32 options)
+{
+ int n;
+
+ /*
+ * Check that SPS_O_ and BAM_PIPE_IRQ_ values are identical.
+ * This is required so that the raw pipe IRQ status can be passed
+ * to the client in the SPS_EVENT_IRQ.
+ */
+ for (n = 0; n < ARRAY_SIZE(opt_event_table); n++) {
+ if (opt_event_table[n].option != opt_event_table[n].pipe_irq) {
+ SPS_ERR("SPS_O 0x%x != HAL IRQ 0x%x",
+ opt_event_table[n].option,
+ opt_event_table[n].pipe_irq);
+ return SPS_ERROR;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * BAM interrupt service routine
+ *
+ * This function is the BAM interrupt service routine.
+ *
+ * @ctxt - pointer to ISR's registered argument
+ *
+ * @return void
+ */
+static irqreturn_t bam_isr(int irq, void *ctxt)
+{
+ struct sps_bam *dev = ctxt;
+ struct sps_pipe *pipe;
+ u32 source;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&dev->isr_lock, flags);
+
+ /* Get BAM interrupt source(s) */
+ if ((dev->state & BAM_STATE_MTI) == 0) {
+ u32 mask = dev->pipe_active_mask;
+ source = bam_get_and_clear_irq_status(dev->base,
+ dev->props.ee,
+ mask);
+
+ SPS_DBG("sps:bam_isr:source=0x%x.mask=0x%x.", source, mask);
+
+ /* Mask any non-local source */
+ source &= dev->pipe_active_mask;
+ } else {
+ /* If MTIs are used, must poll each active pipe */
+ source = dev->pipe_active_mask;
+ }
+
+ /* Process active pipe sources */
+ pipe = list_first_entry(&dev->pipes_q, struct sps_pipe, list);
+
+ list_for_each_entry(pipe, &dev->pipes_q, list) {
+ /* Check this pipe's bit in the source mask */
+ if ((source & pipe->pipe_index_mask)) {
+ /* This pipe has an interrupt pending */
+ pipe_handler(dev, pipe);
+ source &= ~pipe->pipe_index_mask;
+ }
+ if (source == 0)
+ break;
+ }
+
+ /* Process any inactive pipe sources */
+ if (source) {
+ SPS_ERR("IRQ from BAM 0x%x inactive pipe(s) 0x%x",
+ BAM_ID(dev), source);
+ dev->irq_from_disabled_pipe++;
+ }
+
+ spin_unlock_irqrestore(&dev->isr_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * BAM device enable
+ */
+int sps_bam_enable(struct sps_bam *dev)
+{
+ u32 num_pipes;
+ u32 irq_mask;
+ int result;
+ int rc;
+
+ /* Is this BAM enabled? */
+ if ((dev->state & BAM_STATE_ENABLED))
+ return 0; /* Yes, so no work to do */
+
+ /* Is there any access to this BAM? */
+ if ((dev->props.manage & SPS_BAM_MGR_ACCESS_MASK) == SPS_BAM_MGR_NONE) {
+ SPS_ERR("No local access to BAM 0x%x", BAM_ID(dev));
+ return SPS_ERROR;
+ }
+
+ /* Set interrupt handling */
+ if ((dev->props.options & SPS_BAM_OPT_IRQ_DISABLED) != 0 ||
+ dev->props.irq == SPS_IRQ_INVALID) {
+ /* Disable the BAM interrupt */
+ irq_mask = 0;
+ dev->state &= ~BAM_STATE_IRQ;
+ } else {
+ /* Register BAM ISR */
+ if (dev->props.irq > 0)
+ result = request_irq(dev->props.irq,
+ (irq_handler_t) bam_isr,
+ IRQF_TRIGGER_HIGH, "sps", dev);
+
+ if (result) {
+ SPS_ERR("Failed to register BAM 0x%x IRQ %d",
+ BAM_ID(dev), dev->props.irq);
+ return SPS_ERROR;
+ }
+
+ /* Enable the BAM interrupt */
+ irq_mask = BAM_IRQ_ALL;
+ dev->state |= BAM_STATE_IRQ;
+ }
+
+ /* Is global BAM control managed by the local processor? */
+ num_pipes = 0;
+ if ((dev->props.manage & SPS_BAM_MGR_DEVICE_REMOTE) == 0)
+ /* Yes, so initialize the BAM device */
+ rc = bam_init(dev->base,
+ dev->props.ee,
+ (u16) dev->props.summing_threshold,
+ irq_mask,
+ &dev->version, &num_pipes);
+ else
+ /* No, so just verify that it is enabled */
+ rc = bam_check(dev->base, &dev->version, &num_pipes);
+
+ if (rc) {
+ SPS_ERR("Failed to init BAM 0x%x IRQ %d",
+ BAM_ID(dev), dev->props.irq);
+ return SPS_ERROR;
+ }
+
+ /*
+ * Enable MTI use (message triggered interrupt)
+ * if local processor does not control the global BAM config
+ * and this BAM supports MTIs.
+ */
+ if ((dev->state & BAM_STATE_IRQ) != 0 &&
+ (dev->props.manage & SPS_BAM_MGR_DEVICE_REMOTE) != 0 &&
+ BAM_VERSION_MTI_SUPPORT(dev->version)) {
+ if (dev->props.irq_gen_addr == 0 ||
+ dev->props.irq_gen_addr == SPS_ADDR_INVALID) {
+ SPS_ERR("MTI destination address not specified "
+ "for BAM 0x%x", BAM_ID(dev));
+ return SPS_ERROR;
+ }
+ dev->state |= BAM_STATE_MTI;
+ }
+
+ if (num_pipes) {
+ dev->props.num_pipes = num_pipes;
+ SPS_DBG("BAM 0x%x number of pipes reported by hw: %d",
+ BAM_ID(dev), dev->props.num_pipes);
+ }
+
+ /*
+ * If local processor controls the BAM global configuration,
+ * set all restricted pipes to MTI mode
+ */
+ if ((dev->props.manage & SPS_BAM_MGR_DEVICE_REMOTE) == 0) {
+ u32 pipe_index;
+ u32 pipe_mask;
+ for (pipe_index = 0, pipe_mask = 1;
+ pipe_index < dev->props.num_pipes;
+ pipe_index++, pipe_mask <<= 1) {
+ if ((pipe_mask & dev->props.restricted_pipes) == 0)
+ continue; /* This is a local pipe */
+
+ /*
+ * Enable MTI with destination address of zero
+ * (and source mask zero). Pipe is in reset,
+ * so no interrupt will be generated.
+ */
+ bam_pipe_satellite_mti(dev->base, pipe_index, 0,
+ dev->props.ee);
+ }
+ }
+
+ dev->state |= BAM_STATE_ENABLED;
+ SPS_DBG("BAM 0x%x enabled: ver: %d, number of pipes: %d",
+ BAM_ID(dev), dev->version, dev->props.num_pipes);
+ return 0;
+}
+
+/**
+ * BAM device disable
+ *
+ */
+int sps_bam_disable(struct sps_bam *dev)
+{
+ if ((dev->state & BAM_STATE_ENABLED) == 0)
+ return 0;
+
+ /* Is there any access to this BAM? */
+ if ((dev->props.manage & SPS_BAM_MGR_ACCESS_MASK) == SPS_BAM_MGR_NONE) {
+ SPS_ERR("No local access to BAM 0x%x", BAM_ID(dev));
+ return SPS_ERROR;
+ }
+
+ /* Is this BAM controlled by the local processor? */
+ if ((dev->props.manage & SPS_BAM_MGR_DEVICE_REMOTE)) {
+ /* No, so just mark it disabled */
+ dev->state &= ~BAM_STATE_ENABLED;
+ return 0;
+ }
+
+ /* Disable BAM (interrupts) */
+ if ((dev->state & BAM_STATE_IRQ)) {
+ bam_exit(dev->base, dev->props.ee);
+
+ /* Deregister BAM ISR */
+ if ((dev->state & BAM_STATE_IRQ))
+ if (dev->props.irq > 0)
+ free_irq(dev->props.irq, dev);
+ dev->state &= ~BAM_STATE_IRQ;
+ }
+
+ dev->state &= ~BAM_STATE_ENABLED;
+
+ SPS_DBG("BAM 0x%x disabled", BAM_ID(dev));
+
+ return 0;
+}
+
+/**
+ * BAM device initialization
+ */
+int sps_bam_device_init(struct sps_bam *dev)
+{
+ if (dev->props.virt_addr == NULL) {
+ SPS_ERR("NULL BAM virtual address");
+ return SPS_ERROR;
+ }
+ dev->base = (void *) dev->props.virt_addr;
+
+ if (dev->props.num_pipes == 0) {
+ /* Assume max number of pipes until BAM registers can be read */
+ dev->props.num_pipes = BAM_MAX_PIPES;
+ SPS_DBG("BAM 0x%x: assuming max number of pipes: %d",
+ BAM_ID(dev), dev->props.num_pipes);
+ }
+
+ /* Init BAM state data */
+ dev->state = 0;
+ dev->pipe_active_mask = 0;
+ dev->pipe_remote_mask = 0;
+ INIT_LIST_HEAD(&dev->pipes_q);
+
+ spin_lock_init(&dev->isr_lock);
+
+ if ((dev->props.options & SPS_BAM_OPT_ENABLE_AT_BOOT))
+ if (sps_bam_enable(dev))
+ return SPS_ERROR;
+
+ SPS_DBG("BAM device: phys 0x%x IRQ %d", BAM_ID(dev), dev->props.irq);
+
+ return 0;
+}
+
+/**
+ * BAM device de-initialization
+ *
+ */
+int sps_bam_device_de_init(struct sps_bam *dev)
+{
+ int result;
+
+ SPS_DBG("BAM device DEINIT: phys 0x%x IRQ %d",
+ BAM_ID(dev), dev->props.irq);
+
+ result = sps_bam_disable(dev);
+
+ return result;
+}
+
+/**
+ * BAM device reset
+ *
+ */
+int sps_bam_reset(struct sps_bam *dev)
+{
+ struct sps_pipe *pipe;
+ u32 pipe_index;
+ int result;
+
+ SPS_DBG("BAM device RESET: phys 0x%x IRQ %d",
+ BAM_ID(dev), dev->props.irq);
+
+ /* If BAM is enabled, then disable */
+ result = 0;
+ if ((dev->state & BAM_STATE_ENABLED)) {
+ /* Verify that no pipes are currently allocated */
+ for (pipe_index = 0; pipe_index < dev->props.num_pipes;
+ pipe_index++) {
+ pipe = dev->pipes[pipe_index];
+ if (BAM_PIPE_IS_ASSIGNED(pipe)) {
+ SPS_ERR("BAM device 0x%x RESET failed: "
+ "pipe %d in use",
+ BAM_ID(dev), pipe_index);
+ result = SPS_ERROR;
+ break;
+ }
+ }
+
+ if (result == 0)
+ result = sps_bam_disable(dev);
+ }
+
+ /* BAM will be reset as part of the enable process */
+ if (result == 0)
+ result = sps_bam_enable(dev);
+
+ return result;
+}
+
+/**
+ * Clear the BAM pipe state struct
+ *
+ * This function clears the BAM pipe state struct.
+ *
+ * @pipe - pointer to client pipe struct
+ *
+ */
+static void pipe_clear(struct sps_pipe *pipe)
+{
+ INIT_LIST_HEAD(&pipe->list);
+
+ pipe->state = 0;
+ pipe->pipe_index = SPS_BAM_PIPE_INVALID;
+ pipe->pipe_index_mask = 0;
+ pipe->irq_mask = 0;
+ pipe->mode = -1;
+ pipe->num_descs = 0;
+ pipe->desc_size = 0;
+ memset(&pipe->sys, 0, sizeof(pipe->sys));
+ INIT_LIST_HEAD(&pipe->sys.events_q);
+}
+
+/**
+ * Allocate a BAM pipe
+ *
+ */
+u32 sps_bam_pipe_alloc(struct sps_bam *dev, u32 pipe_index)
+{
+ u32 pipe_mask;
+
+ if (pipe_index == SPS_BAM_PIPE_INVALID) {
+ /* Allocate a pipe from the BAM */
+ if ((dev->props.manage & SPS_BAM_MGR_PIPE_NO_ALLOC)) {
+ SPS_ERR("Restricted from allocating pipes on BAM 0x%x",
+ BAM_ID(dev));
+ return SPS_BAM_PIPE_INVALID;
+ }
+ for (pipe_index = 0, pipe_mask = 1;
+ pipe_index < dev->props.num_pipes;
+ pipe_index++, pipe_mask <<= 1) {
+ if ((pipe_mask & dev->props.restricted_pipes))
+ continue; /* This is a restricted pipe */
+
+ if (dev->pipes[pipe_index] == NULL)
+ break; /* Found an available pipe */
+ }
+ if (pipe_index >= dev->props.num_pipes) {
+ SPS_ERR("Failed to allocate pipe on BAM 0x%x",
+ BAM_ID(dev));
+ return SPS_BAM_PIPE_INVALID;
+ }
+ } else {
+ /* Check that client-specified pipe is available */
+ if (pipe_index >= dev->props.num_pipes) {
+ SPS_ERR("Invalid pipe %d for allocate on BAM 0x%x",
+ pipe_index, BAM_ID(dev));
+ return SPS_BAM_PIPE_INVALID;
+ }
+ if ((dev->props.restricted_pipes & (1UL << pipe_index))) {
+ SPS_ERR("BAM 0x%x pipe %d is not local",
+ BAM_ID(dev), pipe_index);
+ return SPS_BAM_PIPE_INVALID;
+ }
+ if (dev->pipes[pipe_index] != NULL) {
+ SPS_ERR("Pipe %d already allocated on BAM 0x%x",
+ pipe_index, BAM_ID(dev));
+ return SPS_BAM_PIPE_INVALID;
+ }
+ }
+
+ /* Mark pipe as allocated */
+ dev->pipes[pipe_index] = BAM_PIPE_UNASSIGNED;
+
+ return pipe_index;
+}
+
+/**
+ * Free a BAM pipe
+ *
+ */
+void sps_bam_pipe_free(struct sps_bam *dev, u32 pipe_index)
+{
+ struct sps_pipe *pipe;
+
+ if (pipe_index >= dev->props.num_pipes) {
+ SPS_ERR("Invalid BAM 0x%x pipe: %d", BAM_ID(dev), pipe_index);
+ return;
+ }
+
+ /* Get the client pipe struct and mark the pipe free */
+ pipe = dev->pipes[pipe_index];
+ dev->pipes[pipe_index] = NULL;
+
+ /* Is the pipe currently allocated? */
+ if (pipe == NULL) {
+ SPS_ERR("Attempt to free unallocated pipe %d on BAM 0x%x",
+ pipe_index, BAM_ID(dev));
+ return;
+ }
+
+ if (pipe == BAM_PIPE_UNASSIGNED)
+ return; /* Never assigned, so no work to do */
+
+ /* Return pending items to appropriate pools */
+ if (!list_empty(&pipe->sys.events_q)) {
+ struct sps_q_event *sps_event;
+
+ SPS_ERR("Disconnect BAM 0x%x pipe %d with events pending",
+ BAM_ID(dev), pipe_index);
+
+ list_for_each_entry(sps_event, &pipe->sys.events_q, list) {
+ list_del(&sps_event->list);
+ kfree(sps_event);
+ }
+ }
+
+ /* Clear the BAM pipe state struct */
+ pipe_clear(pipe);
+}
+
+/**
+ * Establish BAM pipe connection
+ *
+ */
+int sps_bam_pipe_connect(struct sps_pipe *bam_pipe,
+ const struct sps_bam_connect_param *params)
+{
+ struct bam_pipe_parameters hw_params;
+ struct sps_bam *dev;
+ const struct sps_connection *map = bam_pipe->map;
+ const struct sps_conn_end_pt *map_pipe;
+ const struct sps_conn_end_pt *other_pipe;
+ void *desc_buf = NULL;
+ u32 pipe_index;
+ int result;
+
+ /* Clear the client pipe state and hw init struct */
+ pipe_clear(bam_pipe);
+ memset(&hw_params, 0, sizeof(hw_params));
+
+ /* Initialize the BAM state struct */
+ bam_pipe->mode = params->mode;
+
+ /* Set pipe streaming mode */
+ if ((params->options & SPS_O_STREAMING) == 0)
+ hw_params.stream_mode = BAM_STREAM_MODE_DISABLE;
+ else
+ hw_params.stream_mode = BAM_STREAM_MODE_ENABLE;
+
+ /* Determine which end point to connect */
+ if (bam_pipe->mode == SPS_MODE_SRC) {
+ map_pipe = &map->src;
+ other_pipe = &map->dest;
+ hw_params.dir = BAM_PIPE_PRODUCER;
+ } else {
+ map_pipe = &map->dest;
+ other_pipe = &map->src;
+ hw_params.dir = BAM_PIPE_CONSUMER;
+ }
+
+ /* Process map parameters */
+ dev = map_pipe->bam;
+ pipe_index = map_pipe->pipe_index;
+ if (pipe_index >= dev->props.num_pipes) {
+ SPS_ERR("Invalid BAM 0x%x pipe: %d", BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+ hw_params.event_threshold = (u16) map_pipe->event_threshold;
+ hw_params.ee = dev->props.ee;
+
+ /* Verify that control of this pipe is allowed */
+ if ((dev->props.manage & SPS_BAM_MGR_PIPE_NO_CTRL) ||
+ (dev->props.restricted_pipes & (1UL << pipe_index))) {
+ SPS_ERR("BAM 0x%x pipe %d is not local",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Control without configuration permission is not supported yet */
+ if ((dev->props.manage & SPS_BAM_MGR_PIPE_NO_CONFIG)) {
+ SPS_ERR("BAM 0x%x pipe %d remote config is not supported",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Determine operational mode */
+ if (other_pipe->bam != NULL) {
+ /* BAM-to-BAM mode */
+ bam_pipe->state |= BAM_STATE_BAM2BAM;
+ hw_params.mode = BAM_PIPE_MODE_BAM2BAM;
+ hw_params.peer_phys_addr =
+ ((struct sps_bam *) (other_pipe->bam))->props.phys_addr;
+ hw_params.peer_pipe = other_pipe->pipe_index;
+
+ /* Verify FIFO buffers are allocated for BAM-to-BAM pipes */
+ if (map->desc.phys_base == SPS_ADDR_INVALID ||
+ map->data.phys_base == SPS_ADDR_INVALID ||
+ map->desc.size == 0 || map->data.size == 0) {
+ SPS_ERR("FIFO buffers are not allocated for BAM 0x%x "
+ "pipe %d", BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+ hw_params.data_base = map->data.phys_base;
+ hw_params.data_size = map->data.size;
+
+ /* Clear the data FIFO for debug */
+ if (map->data.base != NULL && bam_pipe->mode == SPS_MODE_SRC)
+ memset(map->data.base, 0, hw_params.data_size);
+ } else {
+ /* System mode */
+ hw_params.mode = BAM_PIPE_MODE_SYSTEM;
+ bam_pipe->sys.desc_buf = map->desc.base;
+ bam_pipe->sys.desc_offset = 0;
+ bam_pipe->sys.acked_offset = 0;
+ }
+
+ /* Initialize the client pipe state */
+ bam_pipe->pipe_index = pipe_index;
+ bam_pipe->pipe_index_mask = 1UL << pipe_index;
+
+ /* Get virtual address for descriptor FIFO */
+ if (map->desc.phys_base != SPS_ADDR_INVALID) {
+ if (map->desc.size < (2 * sizeof(struct sps_iovec))) {
+ SPS_ERR("Invalid descriptor FIFO size "
+ "for BAM 0x%x pipe %d: %d",
+ BAM_ID(dev), pipe_index, map->desc.size);
+ return SPS_ERROR;
+ }
+ desc_buf = map->desc.base;
+
+ /*
+ * Note that descriptor base and size will be left zero from
+ * the memset() above if the physical address was invalid.
+ * This allows a satellite driver to set the FIFO as
+ * local memory for system mode.
+ */
+ hw_params.desc_base = map->desc.phys_base;
+ hw_params.desc_size = map->desc.size;
+ }
+
+ /* Configure the descriptor FIFO for both operational modes */
+ if (desc_buf != NULL)
+ if (bam_pipe->mode == SPS_MODE_SRC ||
+ hw_params.mode == BAM_PIPE_MODE_SYSTEM)
+ memset(desc_buf, 0, hw_params.desc_size);
+
+ bam_pipe->desc_size = hw_params.desc_size;
+ bam_pipe->num_descs = bam_pipe->desc_size / sizeof(struct sps_iovec);
+
+ result = SPS_ERROR;
+ /* Insure that the BAM is enabled */
+ if ((dev->state & BAM_STATE_ENABLED) == 0)
+ if (sps_bam_enable(dev))
+ goto exit_err;
+
+ /* Check pipe allocation */
+ if (dev->pipes[pipe_index] != BAM_PIPE_UNASSIGNED) {
+ SPS_ERR("Invalid pipe %d on BAM 0x%x for connect",
+ pipe_index, BAM_ID(dev));
+ goto exit_err;
+ }
+
+ if (bam_pipe_is_enabled(dev->base, pipe_index)) {
+ SPS_ERR("BAM 0x%x pipe %d sharing violation",
+ BAM_ID(dev), pipe_index);
+ goto exit_err;
+ }
+
+ if (bam_pipe_init(dev->base, pipe_index, &hw_params)) {
+ SPS_ERR("BAM 0x%x pipe %d init error",
+ BAM_ID(dev), pipe_index);
+ goto exit_err;
+ }
+
+ /* Assign pipe to client */
+ dev->pipes[pipe_index] = bam_pipe;
+
+ /* Process configuration parameters */
+ if (params->options != 0 ||
+ (bam_pipe->state & BAM_STATE_BAM2BAM) == 0) {
+ /* Process init-time only parameters */
+ u32 irq_gen_addr;
+
+ /* Set interrupt mode */
+ irq_gen_addr = SPS_ADDR_INVALID;
+ if ((params->options & SPS_O_IRQ_MTI))
+ /* Client has directly specified the MTI address */
+ irq_gen_addr = params->irq_gen_addr;
+ else if ((dev->state & BAM_STATE_MTI))
+ /* This BAM has MTI use enabled */
+ irq_gen_addr = dev->props.irq_gen_addr;
+
+ if (irq_gen_addr != SPS_ADDR_INVALID) {
+ /*
+ * No checks - assume BAM is already setup for
+ * MTI generation,
+ * or the pipe will be set to satellite control.
+ */
+ bam_pipe->state |= BAM_STATE_MTI;
+ bam_pipe->irq_gen_addr = irq_gen_addr;
+ }
+
+ /* Process runtime parameters */
+ if (sps_bam_pipe_set_params(dev, pipe_index,
+ params->options)) {
+ dev->pipes[pipe_index] = BAM_PIPE_UNASSIGNED;
+ goto exit_err;
+ }
+ }
+
+ /* Indicate initialization is complete */
+ dev->pipes[pipe_index] = bam_pipe;
+ dev->pipe_active_mask |= 1UL << pipe_index;
+ list_add_tail(&bam_pipe->list, &dev->pipes_q);
+
+ bam_pipe->state |= BAM_STATE_INIT;
+ result = 0;
+exit_err:
+ if (result) {
+ bam_pipe_exit(dev->base, pipe_index, dev->props.ee);
+
+ /* Clear the client pipe state */
+ pipe_clear(bam_pipe);
+ }
+
+ return result;
+}
+
+/**
+ * Disconnect a BAM pipe connection
+ *
+ */
+int sps_bam_pipe_disconnect(struct sps_bam *dev, u32 pipe_index)
+{
+ struct sps_pipe *pipe;
+ int result;
+
+ if (pipe_index >= dev->props.num_pipes) {
+ SPS_ERR("Invalid BAM 0x%x pipe: %d", BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Deallocate and reset the BAM pipe */
+ pipe = dev->pipes[pipe_index];
+ if (BAM_PIPE_IS_ASSIGNED(pipe)) {
+ if ((dev->pipe_active_mask & (1UL << pipe_index))) {
+ list_del(&pipe->list);
+ dev->pipe_active_mask &= ~(1UL << pipe_index);
+ }
+ dev->pipe_remote_mask &= ~(1UL << pipe_index);
+ bam_pipe_exit(dev->base, pipe_index, dev->props.ee);
+ if (pipe->sys.desc_cache != NULL) {
+ kfree(pipe->sys.desc_cache);
+ pipe->sys.desc_cache = NULL;
+ }
+ dev->pipes[pipe_index] = BAM_PIPE_UNASSIGNED;
+ pipe_clear(pipe);
+ result = 0;
+ } else {
+ result = SPS_ERROR;
+ }
+
+ if (result)
+ SPS_ERR("BAM 0x%x pipe %d already disconnected",
+ BAM_ID(dev), pipe_index);
+
+ return result;
+}
+
+/**
+ * Set BAM pipe interrupt enable state
+ *
+ * This function sets the interrupt enable state for a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @poll - true if SPS_O_POLL is set, false otherwise
+ *
+ */
+static void pipe_set_irq(struct sps_bam *dev, u32 pipe_index,
+ u32 poll)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ enum bam_enable irq_enable;
+
+ if (poll == 0 && pipe->irq_mask != 0 &&
+ (dev->state & BAM_STATE_IRQ)) {
+ if ((pipe->state & BAM_STATE_BAM2BAM) != 0 &&
+ (pipe->state & BAM_STATE_IRQ) == 0) {
+ /*
+ * If enabling the interrupt for a BAM-to-BAM pipe,
+ * clear the existing interrupt status
+ */
+ (void)bam_pipe_get_and_clear_irq_status(dev->base,
+ pipe_index);
+ }
+ pipe->state |= BAM_STATE_IRQ;
+ irq_enable = BAM_ENABLE;
+ pipe->polled = false;
+ } else {
+ pipe->state &= ~BAM_STATE_IRQ;
+ irq_enable = BAM_DISABLE;
+ pipe->polled = true;
+ if (poll == 0 && pipe->irq_mask)
+ SPS_INFO("BAM 0x%x pipe %d forced to use polling",
+ BAM_ID(dev), pipe_index);
+ }
+ if ((pipe->state & BAM_STATE_MTI) == 0)
+ bam_pipe_set_irq(dev->base, pipe_index, irq_enable,
+ pipe->irq_mask, dev->props.ee);
+ else
+ bam_pipe_set_mti(dev->base, pipe_index, irq_enable,
+ pipe->irq_mask, pipe->irq_gen_addr);
+
+}
+
+/**
+ * Set BAM pipe parameters
+ *
+ */
+int sps_bam_pipe_set_params(struct sps_bam *dev, u32 pipe_index, u32 options)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ u32 mask;
+ int wake_up_is_one_shot;
+ int no_queue;
+ int ack_xfers;
+ u32 size;
+ int n;
+
+ /* Capture some options */
+ wake_up_is_one_shot = ((options & SPS_O_WAKEUP_IS_ONESHOT));
+ no_queue = ((options & SPS_O_NO_Q));
+ ack_xfers = ((options & SPS_O_ACK_TRANSFERS));
+
+ /* Create interrupt source mask */
+ mask = 0;
+ for (n = 0; n < ARRAY_SIZE(opt_event_table); n++) {
+ /* Is client registering for this event? */
+ if ((options & opt_event_table[n].option) == 0)
+ continue; /* No */
+
+ mask |= opt_event_table[n].pipe_irq;
+ }
+
+#ifdef SPS_BAM_STATISTICS
+ /* Is an illegal mode change specified? */
+ if (pipe->sys.desc_wr_count > 0 &&
+ (no_queue != pipe->sys.no_queue
+ || ack_xfers != pipe->sys.ack_xfers)) {
+ SPS_ERR("Queue/ack mode change after transfer: "
+ "BAM 0x%x pipe %d opt 0x%x",
+ BAM_ID(dev), pipe_index, options);
+ return SPS_ERROR;
+ }
+#endif /* SPS_BAM_STATISTICS */
+
+ /* Is client setting invalid options for a BAM-to-BAM connection? */
+ if ((pipe->state & BAM_STATE_BAM2BAM) &&
+ (options & BAM2BAM_O_INVALID)) {
+ SPS_ERR("Invalid option for BAM-to-BAM: BAM 0x%x pipe %d "
+ "opt 0x%x", BAM_ID(dev), pipe_index, options);
+ return SPS_ERROR;
+ }
+
+ /* Allocate descriptor FIFO cache if NO_Q option is disabled */
+ if (!no_queue && pipe->sys.desc_cache == NULL && pipe->num_descs > 0
+ && (pipe->state & BAM_STATE_BAM2BAM) == 0) {
+ /* Allocate both descriptor cache and user pointer array */
+ size = pipe->num_descs * sizeof(void *);
+ pipe->sys.desc_cache =
+ kzalloc(pipe->desc_size + size, GFP_KERNEL);
+ if (pipe->sys.desc_cache == NULL) {
+ /*** MUST BE LAST POINT OF FAILURE (see below) *****/
+ SPS_ERR("Desc cache error: BAM 0x%x pipe %d: %d",
+ BAM_ID(dev), pipe_index,
+ pipe->desc_size + size);
+ return SPS_ERROR;
+ }
+ pipe->sys.user_ptrs = (void **)(pipe->sys.desc_cache +
+ pipe->desc_size);
+ pipe->sys.cache_offset = pipe->sys.acked_offset;
+ }
+
+ /*
+ * No failures beyond this point. Note that malloc() is last point of
+ * failure, so no free() handling is needed.
+ */
+
+ /* Enable/disable the pipe's interrupt sources */
+ pipe->irq_mask = mask;
+ pipe_set_irq(dev, pipe_index, (options & SPS_O_POLL));
+
+ /* Store software feature enables */
+ pipe->wake_up_is_one_shot = wake_up_is_one_shot;
+ pipe->sys.no_queue = no_queue;
+ pipe->sys.ack_xfers = ack_xfers;
+
+ return 0;
+}
+
+/**
+ * Enable a BAM pipe
+ *
+ */
+int sps_bam_pipe_enable(struct sps_bam *dev, u32 pipe_index)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+
+ /* Enable the BAM pipe */
+ bam_pipe_enable(dev->base, pipe_index);
+ pipe->state |= BAM_STATE_ENABLED;
+
+ return 0;
+}
+
+/**
+ * Disable a BAM pipe
+ *
+ */
+int sps_bam_pipe_disable(struct sps_bam *dev, u32 pipe_index)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+
+ /* Disable the BAM pipe */
+ bam_pipe_disable(dev->base, pipe_index);
+ pipe->state &= ~BAM_STATE_ENABLED;
+
+ return 0;
+}
+
+/**
+ * Register an event for a BAM pipe
+ *
+ */
+int sps_bam_pipe_reg_event(struct sps_bam *dev,
+ u32 pipe_index,
+ struct sps_register_event *reg)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ struct sps_bam_event_reg *event_reg;
+ int n;
+
+ if (pipe->sys.no_queue && reg->xfer_done != NULL &&
+ reg->mode != SPS_TRIGGER_CALLBACK) {
+ SPS_ERR("Only callback events support for NO_Q: "
+ "BAM 0x%x pipe %d mode %d",
+ BAM_ID(dev), pipe_index, reg->mode);
+ return SPS_ERROR;
+ }
+
+ for (n = 0; n < ARRAY_SIZE(opt_event_table); n++) {
+ int index;
+
+ /* Is client registering for this event? */
+ if ((reg->options & opt_event_table[n].option) == 0)
+ continue; /* No */
+
+ index = SPS_EVENT_INDEX(opt_event_table[n].event_id);
+ event_reg = &pipe->sys.event_regs[index];
+ event_reg->xfer_done = reg->xfer_done;
+ event_reg->callback = reg->callback;
+ event_reg->mode = reg->mode;
+ event_reg->user = reg->user;
+ }
+
+ return 0;
+}
+
+/**
+ * Submit a transfer of a single buffer to a BAM pipe
+ *
+ */
+int sps_bam_pipe_transfer_one(struct sps_bam *dev,
+ u32 pipe_index, u32 addr, u32 size,
+ void *user, u32 flags)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ struct sps_iovec *desc;
+ struct sps_iovec iovec;
+ u32 next_write;
+
+ /* Is this a BAM-to-BAM or satellite connection? */
+ if ((pipe->state & (BAM_STATE_BAM2BAM | BAM_STATE_REMOTE))) {
+ SPS_ERR("Transfer on BAM-to-BAM: BAM 0x%x pipe %d",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /*
+ * Client identifier (user pointer) is not supported for
+ * SPS_O_NO_Q option.
+ */
+ if (pipe->sys.no_queue && user != NULL) {
+ SPS_ERR("User pointer arg non-NULL: BAM 0x%x pipe %d",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Determine if descriptor can be queued */
+ next_write = pipe->sys.desc_offset + sizeof(struct sps_iovec);
+ if (next_write >= pipe->desc_size)
+ next_write = 0;
+
+ if (next_write == pipe->sys.acked_offset) {
+ /*
+ * If pipe is polled and client is not ACK'ing descriptors,
+ * perform polling operation so that any outstanding ACKs
+ * can occur.
+ */
+ if (!pipe->sys.ack_xfers && pipe->polled) {
+ pipe_handler_eot(dev, pipe);
+ if (next_write == pipe->sys.acked_offset) {
+ SPS_DBG("Descriptor FIFO is full for "
+ "BAM 0x%x pipe %d",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+ } else {
+ SPS_DBG("Descriptor FIFO is full for "
+ "BAM 0x%x pipe %d", BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+ }
+
+ /* Create descriptor */
+ if (!pipe->sys.no_queue)
+ desc = (struct sps_iovec *) (pipe->sys.desc_cache +
+ pipe->sys.desc_offset);
+ else
+ desc = &iovec;
+
+ desc->addr = addr;
+ desc->size = size;
+ if ((flags & SPS_IOVEC_FLAG_DEFAULT) == 0) {
+ desc->flags = flags & BAM_IOVEC_FLAG_MASK;
+ } else {
+ if (pipe->mode == SPS_MODE_SRC)
+ desc->flags = SPS_IOVEC_FLAG_INT;
+ else
+ desc->flags = SPS_IOVEC_FLAG_INT | SPS_IOVEC_FLAG_EOT;
+ }
+#ifdef SPS_BAM_STATISTICS
+ if ((flags & SPS_IOVEC_FLAG_INT))
+ pipe->sys.int_flags++;
+ if ((flags & SPS_IOVEC_FLAG_EOT))
+ pipe->sys.eot_flags++;
+#endif /* SPS_BAM_STATISTICS */
+
+ /* Update hardware descriptor FIFO - should result in burst */
+ *((struct sps_iovec *) (pipe->sys.desc_buf + pipe->sys.desc_offset))
+ = *desc;
+
+ /* Record user pointer value */
+ if (!pipe->sys.no_queue) {
+ u32 index = pipe->sys.desc_offset / sizeof(struct sps_iovec);
+ pipe->sys.user_ptrs[index] = user;
+#ifdef SPS_BAM_STATISTICS
+ if (user != NULL)
+ pipe->sys.user_ptrs_count++;
+#endif /* SPS_BAM_STATISTICS */
+ }
+
+ /* Update descriptor ACK offset */
+ pipe->sys.desc_offset = next_write;
+
+#ifdef SPS_BAM_STATISTICS
+ /* Update statistics */
+ pipe->sys.desc_wr_count++;
+#endif /* SPS_BAM_STATISTICS */
+
+ /* Notify pipe */
+ if ((flags & SPS_IOVEC_FLAG_NO_SUBMIT) == 0) {
+ wmb(); /* Memory Barrier */
+ bam_pipe_set_desc_write_offset(dev->base, pipe_index,
+ next_write);
+ }
+
+ return 0;
+}
+
+/**
+ * Submit a transfer to a BAM pipe
+ *
+ */
+int sps_bam_pipe_transfer(struct sps_bam *dev,
+ u32 pipe_index, struct sps_transfer *transfer)
+{
+ struct sps_iovec *iovec;
+ u32 count;
+ u32 flags;
+ void *user;
+ int n;
+ int result;
+
+ if (transfer->iovec_count == 0) {
+ SPS_ERR("iovec count zero: BAM 0x%x pipe %d",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ sps_bam_get_free_count(dev, pipe_index, &count);
+ if (count < transfer->iovec_count) {
+ SPS_ERR("Insufficient free desc: BAM 0x%x pipe %d: %d",
+ BAM_ID(dev), pipe_index, count);
+ return SPS_ERROR;
+ }
+
+ user = NULL; /* NULL for all except last descriptor */
+ for (n = (int)transfer->iovec_count - 1, iovec = transfer->iovec;
+ n >= 0; n--, iovec++) {
+ if (n > 0) {
+ /* This is *not* the last descriptor */
+ flags = iovec->flags | SPS_IOVEC_FLAG_NO_SUBMIT;
+ } else {
+ /* This *is* the last descriptor */
+ flags = iovec->flags;
+ user = transfer->user;
+ }
+ result = sps_bam_pipe_transfer_one(dev, pipe_index,
+ iovec->addr,
+ iovec->size, user,
+ flags);
+ if (result)
+ return SPS_ERROR;
+ }
+
+ return 0;
+}
+
+/**
+ * Allocate an event tracking struct
+ *
+ * This function allocates an event tracking struct.
+ *
+ * @pipe - pointer to pipe state
+ *
+ * @event_reg - pointer to event registration
+ *
+ * @return - pointer to event notification struct, or NULL
+ *
+ */
+static struct sps_q_event *alloc_event(struct sps_pipe *pipe,
+ struct sps_bam_event_reg *event_reg)
+{
+ struct sps_q_event *event;
+
+ /* A callback event object is registered, so trigger with payload */
+ event = &pipe->sys.event;
+ memset(event, 0, sizeof(*event));
+
+ return event;
+}
+
+/**
+ * Trigger an event notification
+ *
+ * This function triggers an event notification.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe - pointer to pipe state
+ *
+ * @event_reg - pointer to event registration
+ *
+ * @sps_event - pointer to event struct
+ *
+ */
+static void trigger_event(struct sps_bam *dev,
+ struct sps_pipe *pipe,
+ struct sps_bam_event_reg *event_reg,
+ struct sps_q_event *sps_event)
+{
+ if (sps_event == NULL) {
+ SPS_DBG("sps:trigger_event.sps_event is NULL.");
+ return;
+ }
+
+ if (event_reg->xfer_done) {
+ complete(event_reg->xfer_done);
+ SPS_DBG("sps:trigger_event.done=%d.",
+ event_reg->xfer_done->done);
+ }
+
+ if (event_reg->callback) {
+ event_reg->callback(&sps_event->notify);
+ SPS_DBG("sps:trigger_event.using callback.");
+ }
+
+}
+
+/**
+ * Handle a BAM pipe's generic interrupt sources
+ *
+ * This function creates the event notification for a BAM pipe's
+ * generic interrupt sources. The caller of this function must lock the BAM
+ * device's mutex.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe - pointer to pipe state
+ *
+ * @event_id - event identifier enum
+ *
+ */
+static void pipe_handler_generic(struct sps_bam *dev,
+ struct sps_pipe *pipe,
+ enum sps_event event_id)
+{
+ struct sps_bam_event_reg *event_reg;
+ struct sps_q_event *sps_event;
+ int index;
+
+ index = SPS_EVENT_INDEX(event_id);
+ if (index < 0 || index >= SPS_EVENT_INDEX(SPS_EVENT_MAX))
+ return;
+
+ event_reg = &pipe->sys.event_regs[index];
+ sps_event = alloc_event(pipe, event_reg);
+ if (sps_event != NULL) {
+ sps_event->notify.event_id = event_id;
+ sps_event->notify.user = event_reg->user;
+ trigger_event(dev, pipe, event_reg, sps_event);
+ }
+}
+
+/**
+ * Handle a BAM pipe's WAKEUP interrupt sources
+ *
+ * This function creates the event notification for a BAM pipe's
+ * WAKEUP interrupt source. The caller of this function must lock the BAM
+ * device's mutex.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe - pointer to pipe state
+ *
+ */
+static void pipe_handler_wakeup(struct sps_bam *dev, struct sps_pipe *pipe)
+{
+ struct sps_bam_event_reg *event_reg;
+ struct sps_q_event *event;
+ u32 pipe_index = pipe->pipe_index;
+
+ if (pipe->wake_up_is_one_shot) {
+ /* Disable the pipe WAKEUP interrupt source */
+ pipe->irq_mask &= ~BAM_PIPE_IRQ_WAKE;
+ pipe_set_irq(dev, pipe_index, pipe->polled);
+ }
+
+ event_reg = &pipe->sys.event_regs[SPS_EVENT_INDEX(SPS_EVENT_WAKEUP)];
+ event = alloc_event(pipe, event_reg);
+ if (event != NULL) {
+ event->notify.event_id = SPS_EVENT_WAKEUP;
+ event->notify.user = event_reg->user;
+ trigger_event(dev, pipe, event_reg, event);
+ }
+}
+
+/**
+ * Handle a BAM pipe's EOT/INT interrupt sources
+ *
+ * This function creates the event notification for a BAM pipe's EOT interrupt
+ * source. The caller of this function must lock the BAM device's mutex.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe - pointer to pipe state
+ *
+ */
+static void pipe_handler_eot(struct sps_bam *dev, struct sps_pipe *pipe)
+{
+ struct sps_bam_event_reg *event_reg;
+ struct sps_q_event *event;
+ struct sps_iovec *desc;
+ struct sps_iovec *cache;
+ void **user;
+ u32 *update_offset;
+ u32 pipe_index = pipe->pipe_index;
+ u32 offset;
+ u32 end_offset;
+ enum sps_event event_id;
+ u32 flags;
+ u32 enabled;
+ int producer = (pipe->mode == SPS_MODE_SRC);
+
+ if (pipe->sys.handler_eot)
+ /*
+ * This can happen if the pipe is configured for polling
+ * (IRQ disabled) and callback event generation.
+ * The client may perform a get_iovec() inside the callback.
+ */
+ return;
+
+ pipe->sys.handler_eot = true;
+
+ /* Get offset of last descriptor completed by the pipe */
+ end_offset = bam_pipe_get_desc_read_offset(dev->base, pipe_index);
+
+ /* If no queue, then do not generate any events */
+ if (pipe->sys.no_queue) {
+ if (!pipe->sys.ack_xfers) {
+ /* Client is not ACK'ing transfers, so do it now */
+ pipe->sys.acked_offset = end_offset;
+ }
+ pipe->sys.handler_eot = false;
+ return;
+ }
+
+ /*
+ * Get offset of last descriptor processed by software,
+ * and update to the last descriptor completed by the pipe
+ */
+ if (!pipe->sys.ack_xfers) {
+ update_offset = &pipe->sys.acked_offset;
+ offset = *update_offset;
+ } else {
+ update_offset = &pipe->sys.cache_offset;
+ offset = *update_offset;
+ }
+
+ /* Are there any completed descriptors to process? */
+ if (offset == end_offset) {
+ pipe->sys.handler_eot = false;
+ return;
+ }
+
+ /* Determine enabled events */
+ enabled = 0;
+ if ((pipe->irq_mask & SPS_O_EOT))
+ enabled |= SPS_IOVEC_FLAG_EOT;
+
+ if ((pipe->irq_mask & SPS_O_DESC_DONE))
+ enabled |= SPS_IOVEC_FLAG_INT;
+
+ /*
+ * For producer pipe, update the cached descriptor byte count and flags.
+ * For consumer pipe, the BAM does not update the descriptors, so just
+ * use the cached copies.
+ */
+ if (producer) {
+ /*
+ * Do copies in a tight loop to increase chance of
+ * multi-descriptor burst accesses on the bus
+ */
+ struct sps_iovec *desc_end;
+
+ /* Set starting point for copy */
+ desc = (struct sps_iovec *) (pipe->sys.desc_buf + offset);
+ cache = (struct sps_iovec *) (pipe->sys.desc_cache + offset);
+
+ /* Fetch all completed descriptors to end of FIFO (wrap) */
+ if (end_offset < offset) {
+ desc_end = (struct sps_iovec *)
+ (pipe->sys.desc_buf + pipe->desc_size);
+ while (desc < desc_end)
+ *cache++ = *desc++;
+
+ desc = (void *)pipe->sys.desc_buf;
+ cache = (void *)pipe->sys.desc_cache;
+ }
+
+ /* Fetch all remaining completed descriptors (no wrap) */
+ desc_end = (struct sps_iovec *) (pipe->sys.desc_buf +
+ end_offset);
+ while (desc < desc_end)
+ *cache++ = *desc++;
+ }
+
+ /* Process all completed descriptors */
+ cache = (struct sps_iovec *) (pipe->sys.desc_cache + offset);
+ user = &pipe->sys.user_ptrs[offset / sizeof(struct sps_iovec)];
+ for (;;) {
+ /*
+ * Increment offset to next descriptor and update pipe offset
+ * so a client callback can fetch the I/O vector.
+ */
+ offset += sizeof(struct sps_iovec);
+ if (offset >= pipe->desc_size)
+ /* Roll to start of descriptor FIFO */
+ offset = 0;
+
+ *update_offset = offset;
+#ifdef SPS_BAM_STATISTICS
+ pipe->sys.desc_rd_count++;
+#endif /* SPS_BAM_STATISTICS */
+
+ /* Did client request notification for this descriptor? */
+ flags = cache->flags & enabled;
+ if (*user != NULL || flags) {
+ int index;
+
+ if ((flags & SPS_IOVEC_FLAG_EOT))
+ event_id = SPS_EVENT_EOT;
+ else
+ event_id = SPS_EVENT_DESC_DONE;
+
+ index = SPS_EVENT_INDEX(event_id);
+ event_reg = &pipe->sys.event_regs[index];
+ event = alloc_event(pipe, event_reg);
+ if (event != NULL) {
+ /*
+ * Store the descriptor and user pointer
+ * in the notification
+ */
+ event->notify.data.transfer.iovec = *cache;
+ event->notify.data.transfer.user = *user;
+
+ event->notify.event_id = event_id;
+ event->notify.user = event_reg->user;
+ trigger_event(dev, pipe, event_reg, event);
+ }
+#ifdef SPS_BAM_STATISTICS
+ if (*user != NULL)
+ pipe->sys.user_found++;
+#endif /* SPS_BAM_STATISTICS */
+ }
+
+ /* Increment to next descriptor */
+ if (offset == end_offset)
+ break; /* No more descriptors */
+
+ if (offset) {
+ cache++;
+ user++;
+ } else {
+ cache = (void *)pipe->sys.desc_cache;
+ user = pipe->sys.user_ptrs;
+ }
+ }
+
+ pipe->sys.handler_eot = false;
+}
+
+/**
+ * Handle a BAM pipe's interrupt sources
+ *
+ * This function handles a BAM pipe's interrupt sources.
+ * The caller of this function must lock the BAM device's mutex.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return void
+ *
+ */
+static void pipe_handler(struct sps_bam *dev, struct sps_pipe *pipe)
+{
+ u32 pipe_index;
+ u32 status;
+ enum sps_event event_id;
+
+ /* Get interrupt sources and ack all */
+ pipe_index = pipe->pipe_index;
+ status = bam_pipe_get_and_clear_irq_status(dev->base, pipe_index);
+
+ SPS_DBG("sps:pipe_handler.pipe %d.status=0x%x.", pipe_index, status);
+
+ /* Check for enabled interrupt sources */
+ status &= pipe->irq_mask;
+ if (status == 0)
+ /* No enabled interrupt sources are active */
+ return;
+
+ /*
+ * Process the interrupt sources in order of frequency of occurrance.
+ * Check for early exit opportunities.
+ */
+
+ if ((status & (SPS_O_EOT | SPS_O_DESC_DONE)) &&
+ (pipe->state & BAM_STATE_BAM2BAM) == 0) {
+ pipe_handler_eot(dev, pipe);
+ if (pipe->sys.no_queue) {
+ /*
+ * EOT handler will not generate any event if there
+ * is no queue,
+ * so generate "empty" (no descriptor) event
+ */
+ if ((status & SPS_O_EOT))
+ event_id = SPS_EVENT_EOT;
+ else
+ event_id = SPS_EVENT_DESC_DONE;
+
+ pipe_handler_generic(dev, pipe, event_id);
+ }
+ status &= ~(SPS_O_EOT | SPS_O_DESC_DONE);
+ if (status == 0)
+ return;
+ }
+
+ if ((status & SPS_O_WAKEUP)) {
+ pipe_handler_wakeup(dev, pipe);
+ status &= ~SPS_O_WAKEUP;
+ if (status == 0)
+ return;
+ }
+
+ if ((status & SPS_O_INACTIVE)) {
+ pipe_handler_generic(dev, pipe, SPS_EVENT_INACTIVE);
+ status &= ~SPS_O_INACTIVE;
+ if (status == 0)
+ return;
+ }
+
+ if ((status & SPS_O_OUT_OF_DESC)) {
+ pipe_handler_generic(dev, pipe,
+ SPS_EVENT_OUT_OF_DESC);
+ status &= ~SPS_O_OUT_OF_DESC;
+ if (status == 0)
+ return;
+ }
+
+ if ((status & SPS_EVENT_ERROR))
+ pipe_handler_generic(dev, pipe, SPS_EVENT_ERROR);
+}
+
+/**
+ * Get a BAM pipe event
+ *
+ */
+int sps_bam_pipe_get_event(struct sps_bam *dev,
+ u32 pipe_index, struct sps_event_notify *notify)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ struct sps_q_event *event_queue;
+
+ if (pipe->sys.no_queue) {
+ SPS_ERR("Invalid connection for event: "
+ "BAM 0x%x pipe %d context 0x%x",
+ BAM_ID(dev), pipe_index, (u32) pipe);
+ notify->event_id = SPS_EVENT_INVALID;
+ return SPS_ERROR;
+ }
+
+ /* If pipe is polled, perform polling operation */
+ if (pipe->polled && (pipe->state & BAM_STATE_BAM2BAM) == 0)
+ pipe_handler_eot(dev, pipe);
+
+ /* Pull an event off the synchronous event queue */
+ if (list_empty(&pipe->sys.events_q)) {
+ event_queue = NULL;
+ SPS_DBG("sps:events_q is empty.");
+ } else {
+ SPS_DBG("sps:events_q is not empty.");
+ event_queue =
+ list_first_entry(&pipe->sys.events_q, struct sps_q_event,
+ list);
+ list_del(&event_queue->list);
+ }
+
+ /* Update client's event buffer */
+ if (event_queue == NULL) {
+ /* No event queued, so set client's event to "invalid" */
+ notify->event_id = SPS_EVENT_INVALID;
+ } else {
+ /*
+ * Copy event into client's buffer and return the event
+ * to the pool
+ */
+ *notify = event_queue->notify;
+ kfree(event_queue);
+#ifdef SPS_BAM_STATISTICS
+ pipe->sys.get_events++;
+#endif /* SPS_BAM_STATISTICS */
+ }
+
+ return 0;
+}
+
+/**
+ * Get processed I/O vector
+ */
+int sps_bam_pipe_get_iovec(struct sps_bam *dev, u32 pipe_index,
+ struct sps_iovec *iovec)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ struct sps_iovec *desc;
+ u32 read_offset;
+
+ /* Is this a valid pipe configured for get_iovec use? */
+ if (!pipe->sys.ack_xfers ||
+ (pipe->state & BAM_STATE_BAM2BAM) != 0 ||
+ (pipe->state & BAM_STATE_REMOTE)) {
+ return SPS_ERROR;
+ }
+
+ /* If pipe is polled and queue is enabled, perform polling operation */
+ if (pipe->polled && !pipe->sys.no_queue)
+ pipe_handler_eot(dev, pipe);
+
+ /* Is there a completed descriptor? */
+ if (pipe->sys.no_queue)
+ read_offset =
+ bam_pipe_get_desc_read_offset(dev->base, pipe_index);
+ else
+ read_offset = pipe->sys.cache_offset;
+
+ if (read_offset == pipe->sys.acked_offset) {
+ /* No, so clear the iovec to indicate FIFO is empty */
+ memset(iovec, 0, sizeof(*iovec));
+ return 0;
+ }
+
+ /* Fetch next descriptor */
+ desc = (struct sps_iovec *) (pipe->sys.desc_buf +
+ pipe->sys.acked_offset);
+ *iovec = *desc;
+#ifdef SPS_BAM_STATISTICS
+ pipe->sys.get_iovecs++;
+#endif /* SPS_BAM_STATISTICS */
+
+ /* Update read/ACK offset */
+ pipe->sys.acked_offset += sizeof(struct sps_iovec);
+ if (pipe->sys.acked_offset >= pipe->desc_size)
+ pipe->sys.acked_offset = 0;
+
+ return 0;
+}
+
+/**
+ * Determine whether a BAM pipe descriptor FIFO is empty
+ *
+ */
+int sps_bam_pipe_is_empty(struct sps_bam *dev, u32 pipe_index,
+ u32 *empty)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ u32 end_offset;
+ u32 acked_offset;
+
+ /* Is this a satellite connection? */
+ if ((pipe->state & BAM_STATE_REMOTE)) {
+ SPS_ERR("Is empty on remote: BAM 0x%x pipe %d",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Get offset of last descriptor completed by the pipe */
+ end_offset = bam_pipe_get_desc_read_offset(dev->base, pipe_index);
+
+ if ((pipe->state & BAM_STATE_BAM2BAM) == 0)
+ /* System mode */
+ acked_offset = pipe->sys.acked_offset;
+ else
+ /* BAM-to-BAM */
+ acked_offset = bam_pipe_get_desc_write_offset(dev->base,
+ pipe_index);
+
+
+ /* Determine descriptor FIFO state */
+ if (end_offset == acked_offset)
+ *empty = true;
+ else
+ *empty = false;
+
+ return 0;
+}
+
+/**
+ * Get number of free slots in a BAM pipe descriptor FIFO
+ *
+ */
+int sps_bam_get_free_count(struct sps_bam *dev, u32 pipe_index,
+ u32 *count)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+ u32 next_write;
+ u32 free;
+
+ /* Is this a BAM-to-BAM or satellite connection? */
+ if ((pipe->state & (BAM_STATE_BAM2BAM | BAM_STATE_REMOTE))) {
+ SPS_ERR("Free count on BAM-to-BAM or remote: BAM 0x%x pipe %d",
+ BAM_ID(dev), pipe_index);
+ *count = 0;
+ return SPS_ERROR;
+ }
+
+ /* Determine descriptor FIFO state */
+ next_write = pipe->sys.desc_offset + sizeof(struct sps_iovec);
+ if (next_write >= pipe->desc_size)
+ next_write = 0;
+
+ if (pipe->sys.acked_offset >= next_write)
+ free = pipe->sys.acked_offset - next_write;
+ else
+ free = pipe->desc_size - next_write + pipe->sys.acked_offset;
+
+ free /= sizeof(struct sps_iovec);
+ *count = free;
+
+ return 0;
+}
+
+/**
+ * Set BAM pipe to satellite ownership
+ *
+ */
+int sps_bam_set_satellite(struct sps_bam *dev, u32 pipe_index)
+{
+ struct sps_pipe *pipe = dev->pipes[pipe_index];
+
+ /*
+ * Switch to satellite control is only supported on processor
+ * that controls the BAM global config on multi-EE BAMs
+ */
+ if ((dev->props.manage & SPS_BAM_MGR_MULTI_EE) == 0 ||
+ (dev->props.manage & SPS_BAM_MGR_DEVICE_REMOTE)) {
+ SPS_ERR("Cannot grant satellite control to BAM 0x%x pipe %d",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Is this pipe locally controlled? */
+ if ((dev->pipe_active_mask & (1UL << pipe_index)) == 0) {
+ SPS_ERR("BAM 0x%x pipe %d not local and active",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Disable local interrupts for this pipe */
+ if (!pipe->polled)
+ bam_pipe_set_irq(dev->base, pipe_index, BAM_DISABLE,
+ pipe->irq_mask, dev->props.ee);
+
+ if (BAM_VERSION_MTI_SUPPORT(dev->version)) {
+ /*
+ * Set pipe to MTI interrupt mode.
+ * Must be performed after IRQ disable,
+ * because it is necessary to re-enable the IRQ to enable
+ * MTI generation.
+ * Set both pipe IRQ mask and MTI dest address to zero.
+ */
+ if ((pipe->state & BAM_STATE_MTI) == 0 || pipe->polled) {
+ bam_pipe_satellite_mti(dev->base, pipe_index, 0,
+ dev->props.ee);
+ pipe->state |= BAM_STATE_MTI;
+ }
+ }
+
+ /* Indicate satellite control */
+ list_del(&pipe->list);
+ dev->pipe_active_mask &= ~(1UL << pipe_index);
+ dev->pipe_remote_mask |= pipe->pipe_index_mask;
+ pipe->state |= BAM_STATE_REMOTE;
+
+ return 0;
+}
+
+/**
+ * Perform BAM pipe timer control
+ *
+ */
+int sps_bam_pipe_timer_ctrl(struct sps_bam *dev,
+ u32 pipe_index,
+ struct sps_timer_ctrl *timer_ctrl,
+ struct sps_timer_result *timer_result)
+{
+ enum bam_pipe_timer_mode mode;
+ int result = 0;
+
+ /* Is this pipe locally controlled? */
+ if ((dev->pipe_active_mask & (1UL << pipe_index)) == 0) {
+ SPS_ERR("BAM 0x%x pipe %d not local and active",
+ BAM_ID(dev), pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Perform the timer operation */
+ switch (timer_ctrl->op) {
+ case SPS_TIMER_OP_CONFIG:
+ mode = (timer_ctrl->mode == SPS_TIMER_MODE_ONESHOT) ?
+ BAM_PIPE_TIMER_ONESHOT :
+ BAM_PIPE_TIMER_PERIODIC;
+ bam_pipe_timer_config(dev->base, pipe_index, mode,
+ timer_ctrl->timeout_msec * 10);
+ break;
+ case SPS_TIMER_OP_RESET:
+ bam_pipe_timer_reset(dev->base, pipe_index);
+ break;
+ case SPS_TIMER_OP_READ:
+ break;
+ default:
+ result = SPS_ERROR;
+ break;
+ }
+
+ /* Provide the current timer value */
+ if (timer_result != NULL)
+ timer_result->current_timer =
+ bam_pipe_timer_get_count(dev->base, pipe_index);
+
+ return result;
+}
+
diff --git a/arch/arm/mach-msm/sps/sps_bam.h b/arch/arm/mach-msm/sps/sps_bam.h
new file mode 100644
index 0000000..f09948e
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_bam.h
@@ -0,0 +1,547 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * Function and data structure declarations for SPS BAM handling.
+ */
+
+
+#ifndef _SPSBAM_H_
+#define _SPSBAM_H_
+
+#include <linux/types.h>
+#include <linux/completion.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+
+#include "spsi.h"
+
+#define BAM_MAX_PIPES 31
+#define BAM_HANDLE_INVALID 0
+
+enum bam_irq {
+ BAM_DEV_IRQ_RDY_TO_SLEEP = 0x00000001,
+ BAM_DEV_IRQ_HRESP_ERROR = 0x00000002,
+ BAM_DEV_IRQ_ERROR = 0x00000004,
+};
+
+/* Pipe interrupt mask */
+enum bam_pipe_irq {
+ /* BAM finishes descriptor which has INT bit selected */
+ BAM_PIPE_IRQ_DESC_INT = 0x00000001,
+ /* Inactivity timer Expires */
+ BAM_PIPE_IRQ_TIMER = 0x00000002,
+ /* Wakeup peripheral (i.e. USB) */
+ BAM_PIPE_IRQ_WAKE = 0x00000004,
+ /* Producer - no free space for adding a descriptor */
+ /* Consumer - no descriptors for processing */
+ BAM_PIPE_IRQ_OUT_OF_DESC = 0x00000008,
+ /* Pipe Error interrupt */
+ BAM_PIPE_IRQ_ERROR = 0x00000010,
+ /* End-Of-Transfer */
+ BAM_PIPE_IRQ_EOT = 0x00000020,
+};
+
+/* Halt Type */
+enum bam_halt {
+ BAM_HALT_OFF = 0,
+ BAM_HALT_ON = 1,
+};
+
+/* Threshold values of the DMA channels */
+enum bam_dma_thresh_dma {
+ BAM_DMA_THRESH_512 = 0x3,
+ BAM_DMA_THRESH_256 = 0x2,
+ BAM_DMA_THRESH_128 = 0x1,
+ BAM_DMA_THRESH_64 = 0x0,
+};
+
+/* Weight values of the DMA channels */
+enum bam_dma_weight_dma {
+ BAM_DMA_WEIGHT_HIGH = 7,
+ BAM_DMA_WEIGHT_MED = 3,
+ BAM_DMA_WEIGHT_LOW = 1,
+ BAM_DMA_WEIGHT_DEFAULT = BAM_DMA_WEIGHT_LOW,
+ BAM_DMA_WEIGHT_DISABLE = 0,
+};
+
+
+/* Invalid pipe index value */
+#define SPS_BAM_PIPE_INVALID ((u32)(-1))
+
+/* Parameters for sps_bam_pipe_connect() */
+struct sps_bam_connect_param {
+ /* which end point must be initialized */
+ enum sps_mode mode;
+
+ /* OR'd connection end point options (see SPS_O defines) */
+ u32 options;
+
+ /* SETPEND/MTI interrupt generation parameters */
+ u32 irq_gen_addr;
+ u32 irq_gen_data;
+
+};
+
+/* Event registration struct */
+struct sps_bam_event_reg {
+ /* Client's event object handle */
+ struct completion *xfer_done;
+ void (*callback)(struct sps_event_notify *notify);
+
+ /* Event trigger mode */
+ enum sps_trigger mode;
+
+ /* User pointer that will be provided in event payload data */
+ void *user;
+
+};
+
+/* Descriptor FIFO cache entry */
+struct sps_bam_desc_cache {
+ struct sps_iovec iovec;
+ void *user; /* User pointer registered with this transfer */
+};
+
+/* Forward declaration */
+struct sps_bam;
+
+/* System mode control */
+struct sps_bam_sys_mode {
+ /* Descriptor FIFO control */
+ u8 *desc_buf; /* Descriptor FIFO for BAM pipe */
+ u32 desc_offset; /* Next new descriptor to be written to hardware */
+ u32 acked_offset; /* Next descriptor to be retired by software */
+
+ /* Descriptor cache control (!no_queue only) */
+ u8 *desc_cache; /* Software cache of descriptor FIFO contents */
+ u32 cache_offset; /* Next descriptor to be cached (ack_xfers only) */
+
+ /* User pointers associated with cached descriptors */
+ void **user_ptrs;
+
+ /* Event handling */
+ struct sps_bam_event_reg event_regs[SPS_EVENT_INDEX(SPS_EVENT_MAX)];
+ struct list_head events_q;
+
+ struct sps_q_event event; /* Temp storage for event creation */
+ int no_queue; /* Whether events are queued */
+ int ack_xfers; /* Whether client must ACK all descriptors */
+ int handler_eot; /* Whether EOT handling is in progress (debug) */
+
+ /* Statistics */
+#ifdef SPS_BAM_STATISTICS
+ u32 desc_wr_count;
+ u32 desc_rd_count;
+ u32 user_ptrs_count;
+ u32 user_found;
+ u32 int_flags;
+ u32 eot_flags;
+ u32 callback_events;
+ u32 wait_events;
+ u32 queued_events;
+ u32 get_events;
+ u32 get_iovecs;
+#endif /* SPS_BAM_STATISTICS */
+};
+
+/* BAM pipe descriptor */
+struct sps_pipe {
+ struct list_head list;
+
+ /* Client state */
+ u32 client_state;
+ struct sps_bam *bam;
+ struct sps_connect connect;
+ const struct sps_connection *map;
+
+ /* Pipe parameters */
+ u32 state;
+ u32 pipe_index;
+ u32 pipe_index_mask;
+ u32 irq_mask;
+ int polled;
+ u32 irq_gen_addr;
+ enum sps_mode mode;
+ u32 num_descs; /* Size (number of elements) of descriptor FIFO */
+ u32 desc_size; /* Size (bytes) of descriptor FIFO */
+ int wake_up_is_one_shot; /* Whether WAKEUP event is a one-shot or not */
+
+ /* System mode control */
+ struct sps_bam_sys_mode sys;
+
+};
+
+/* BAM device descriptor */
+struct sps_bam {
+ struct list_head list;
+
+ /* BAM device properties, including connection defaults */
+ struct sps_bam_props props;
+
+ /* BAM device state */
+ u32 state;
+ struct mutex lock;
+ void *base; /* BAM virtual base address */
+ u32 version;
+ spinlock_t isr_lock;
+
+ /* Pipe state */
+ u32 pipe_active_mask;
+ u32 pipe_remote_mask;
+ struct sps_pipe *pipes[BAM_MAX_PIPES];
+ struct list_head pipes_q;
+
+ /* Statistics */
+ u32 irq_from_disabled_pipe;
+ u32 event_trigger_failures;
+
+};
+
+/**
+ * BAM driver initialization
+ *
+ * This function initializes the BAM driver.
+ *
+ * @options - driver options bitflags (see SPS_OPT_*)
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_driver_init(u32 options);
+
+/**
+ * BAM device initialization
+ *
+ * This function initializes a BAM device.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_device_init(struct sps_bam *dev);
+
+/**
+ * BAM device de-initialization
+ *
+ * This function de-initializes a BAM device.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_device_de_init(struct sps_bam *dev);
+
+/**
+ * BAM device reset
+ *
+ * This Function resets a BAM device.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_reset(struct sps_bam *dev);
+
+/**
+ * BAM device enable
+ *
+ * This function enables a BAM device.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_enable(struct sps_bam *dev);
+
+/**
+ * BAM device disable
+ *
+ * This Function disables a BAM device.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_disable(struct sps_bam *dev);
+
+/**
+ * Allocate a BAM pipe
+ *
+ * This function allocates a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - client-specified pipe index, or SPS_BAM_PIPE_INVALID if
+ * any available pipe is acceptable
+ *
+ * @return - allocated pipe index, or SPS_BAM_PIPE_INVALID on error
+ *
+ */
+u32 sps_bam_pipe_alloc(struct sps_bam *dev, u32 pipe_index);
+
+/**
+ * Free a BAM pipe
+ *
+ * This function frees a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ */
+void sps_bam_pipe_free(struct sps_bam *dev, u32 pipe_index);
+
+/**
+ * Establish BAM pipe connection
+ *
+ * This function establishes a connection for a BAM pipe (end point).
+ *
+ * @client - pointer to client pipe state struct
+ *
+ * @params - connection parameters
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_connect(struct sps_pipe *client,
+ const struct sps_bam_connect_param *params);
+
+/**
+ * Disconnect a BAM pipe connection
+ *
+ * This function disconnects a connection for a BAM pipe (end point).
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_disconnect(struct sps_bam *dev, u32 pipe_index);
+
+/**
+ * Set BAM pipe parameters
+ *
+ * This function sets parameters for a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @options - bitflag options (see SPS_O_*)
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_set_params(struct sps_bam *dev, u32 pipe_index, u32 options);
+
+/**
+ * Enable a BAM pipe
+ *
+ * This function enables a BAM pipe. Note that this function
+ * is separate from the pipe connect function to allow proper
+ * sequencing of consumer enable followed by producer enable.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_enable(struct sps_bam *dev, u32 pipe_index);
+
+/**
+ * Disable a BAM pipe
+ *
+ * This function disables a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_disable(struct sps_bam *dev, u32 pipe_index);
+
+/**
+ * Register an event for a BAM pipe
+ *
+ * This function registers an event for a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @reg - pointer to event registration struct
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_reg_event(struct sps_bam *dev, u32 pipe_index,
+ struct sps_register_event *reg);
+
+/**
+ * Submit a transfer of a single buffer to a BAM pipe
+ *
+ * This function submits a transfer of a single buffer to a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @addr - physical address of buffer to transfer
+ *
+ * @size - number of bytes to transfer
+ *
+ * @user - user pointer to register for event
+ *
+ * @flags - descriptor flags (see SPS_IOVEC_FLAG defines)
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_transfer_one(struct sps_bam *dev, u32 pipe_index, u32 addr,
+ u32 size, void *user, u32 flags);
+
+/**
+ * Submit a transfer to a BAM pipe
+ *
+ * This function submits a transfer to a BAM pipe.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @transfer - pointer to transfer struct
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_transfer(struct sps_bam *dev, u32 pipe_index,
+ struct sps_transfer *transfer);
+
+/**
+ * Get a BAM pipe event
+ *
+ * This function polls for a BAM pipe event.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @notify - pointer to event notification struct
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_get_event(struct sps_bam *dev, u32 pipe_index,
+ struct sps_event_notify *notify);
+
+/**
+ * Get processed I/O vector
+ *
+ * This function fetches the next processed I/O vector.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @iovec - Pointer to I/O vector struct (output).
+ * This struct will be zeroed if there are no more processed I/O vectors.
+ *
+ * @return 0 on success, negative value on error
+ */
+int sps_bam_pipe_get_iovec(struct sps_bam *dev, u32 pipe_index,
+ struct sps_iovec *iovec);
+
+/**
+ * Determine whether a BAM pipe descriptor FIFO is empty
+ *
+ * This function returns the empty state of a BAM pipe descriptor FIFO.
+ *
+ * The pipe mutex must be locked before calling this function.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @empty - pointer to client's empty status word (boolean)
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_is_empty(struct sps_bam *dev, u32 pipe_index, u32 *empty);
+
+/**
+ * Get number of free slots in a BAM pipe descriptor FIFO
+ *
+ * This function returns the number of free slots in a BAM pipe descriptor FIFO.
+ *
+ * The pipe mutex must be locked before calling this function.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @count - pointer to count status
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_get_free_count(struct sps_bam *dev, u32 pipe_index, u32 *count);
+
+/**
+ * Set BAM pipe to satellite ownership
+ *
+ * This function sets the BAM pipe to satellite ownership.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_set_satellite(struct sps_bam *dev, u32 pipe_index);
+
+/**
+ * Perform BAM pipe timer control
+ *
+ * This function performs BAM pipe timer control operations.
+ *
+ * @dev - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @timer_ctrl - Pointer to timer control specification
+ *
+ * @timer_result - Pointer to buffer for timer operation result.
+ * This argument can be NULL if no result is expected for the operation.
+ * If non-NULL, the current timer value will always provided.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_bam_pipe_timer_ctrl(struct sps_bam *dev, u32 pipe_index,
+ struct sps_timer_ctrl *timer_ctrl,
+ struct sps_timer_result *timer_result);
+#endif /* _SPSBAM_H_ */
diff --git a/arch/arm/mach-msm/sps/sps_core.h b/arch/arm/mach-msm/sps/sps_core.h
new file mode 100644
index 0000000..5bd7c65
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_core.h
@@ -0,0 +1,107 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * Function and data structure declarations.
+ */
+
+#ifndef _SPS_CORE_H_
+#define _SPS_CORE_H_
+
+#include <linux/types.h> /* u32 */
+#include <linux/mutex.h> /* mutex */
+#include <linux/list.h> /* list_head */
+
+#include "spsi.h"
+#include "sps_bam.h"
+
+/* Connection state definitions */
+#define SPS_STATE_DEF(x) ('S' | ('P' << 8) | ('S' << 16) | ((x) << 24))
+#define IS_SPS_STATE_OK(x) \
+ (((x)->client_state & 0x00ffffff) == SPS_STATE_DEF(0))
+
+/* Configuration indicating satellite connection */
+#define SPS_CONFIG_SATELLITE 0x11111111
+
+/* Client connection state */
+#define SPS_STATE_DISCONNECT 0
+#define SPS_STATE_ALLOCATE SPS_STATE_DEF(1)
+#define SPS_STATE_CONNECT SPS_STATE_DEF(2)
+#define SPS_STATE_ENABLE SPS_STATE_DEF(3)
+#define SPS_STATE_DISABLE SPS_STATE_DEF(4)
+
+/* Connection mapping control struct */
+struct sps_rm {
+ struct list_head connections_q;
+ struct mutex lock;
+};
+
+/**
+ * Find the BAM device from the handle
+ *
+ * This function finds a BAM device in the BAM registration list that
+ * matches the specified device handle.
+ *
+ * @h - device handle of the BAM
+ *
+ * @return - pointer to the BAM device struct, or NULL on error
+ *
+ */
+struct sps_bam *sps_h2bam(u32 h);
+
+/**
+ * Initialize resource manager module
+ *
+ * This function initializes the resource manager module.
+ *
+ * @rm - pointer to resource manager struct
+ *
+ * @options - driver options bitflags (see SPS_OPT_*)
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_rm_init(struct sps_rm *rm, u32 options);
+
+/**
+ * De-initialize resource manager module
+ *
+ * This function de-initializes the resource manager module.
+ *
+ */
+void sps_rm_de_init(void);
+
+/**
+ * Initialize client state context
+ *
+ * This function initializes a client state context struct.
+ *
+ * @connect - pointer to client connection state struct
+ *
+ */
+void sps_rm_config_init(struct sps_connect *connect);
+
+/**
+ * Process connection state change
+ *
+ * This function processes a connection state change.
+ *
+ * @pipe - pointer to pipe context
+ *
+ * @state - new state for connection
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_rm_state_change(struct sps_pipe *pipe, u32 state);
+
+#endif /* _SPS_CORE_H_ */
diff --git a/arch/arm/mach-msm/sps/sps_dma.c b/arch/arm/mach-msm/sps/sps_dma.c
new file mode 100644
index 0000000..9179ed9
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_dma.c
@@ -0,0 +1,896 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* BAM-DMA Manager. */
+
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+
+#include <linux/memory.h> /* memset */
+
+#include "spsi.h"
+#include "bam.h"
+#include "sps_bam.h" /* bam_dma_thresh_dma */
+#include "sps_core.h" /* sps_h2bam() */
+
+/**
+ * registers
+ */
+
+#define DMA_ENBL (0x00000000)
+#define DMA_CHNL_CONFIG(n) (0x00000004 + 4 * (n))
+#define DMA_CONFIG (0x00000040)
+
+/**
+ * masks
+ */
+
+/* DMA_CHNL_confign */
+#define DMA_CHNL_HALT_DONE 0x10000
+#define DMA_CHNL_HALT 0x1000
+#define DMA_CHNL_ENABLE 0x100
+#define DMA_CHNL_ACT_THRESH 0x30
+#define DMA_CHNL_WEIGHT 0x7
+
+/* DMA_CONFIG */
+#define TESTBUS_SELECT 0x3
+
+/**
+ *
+ * Write register with debug info.
+ *
+ * @base - bam base virtual address.
+ * @offset - register offset.
+ * @val - value to write.
+ *
+ */
+static inline void dma_write_reg(void *base, u32 offset, u32 val)
+{
+ iowrite32(val, base + offset);
+ SPS_DBG("bamdma: write reg 0x%x w_val 0x%x.", offset, val);
+}
+
+/**
+ * Write register masked field with debug info.
+ *
+ * @base - bam base virtual address.
+ * @offset - register offset.
+ * @mask - register bitmask.
+ * @val - value to write.
+ *
+ */
+static inline void dma_write_reg_field(void *base, u32 offset,
+ const u32 mask, u32 val)
+{
+ u32 shift = find_first_bit((void *)&mask, 32);
+ u32 tmp = ioread32(base + offset);
+
+ tmp &= ~mask; /* clear written bits */
+ val = tmp | (val << shift);
+ iowrite32(val, base + offset);
+ SPS_DBG("bamdma: write reg 0x%x w_val 0x%x.", offset, val);
+}
+
+/* Round max number of pipes to nearest multiple of 2 */
+#define DMA_MAX_PIPES ((BAM_MAX_PIPES / 2) * 2)
+
+/* Maximum number of BAM-DMAs supported */
+#define MAX_BAM_DMA_DEVICES 1
+
+/* Maximum number of BAMs that will be registered */
+#define MAX_BAM_DMA_BAMS 1
+
+/* Pipe enable check values */
+#define DMA_PIPES_STATE_DIFF 0
+#define DMA_PIPES_BOTH_DISABLED 1
+#define DMA_PIPES_BOTH_ENABLED 2
+
+/* Even pipe is tx/dest/input/write, odd pipe is rx/src/output/read */
+#define DMA_PIPE_IS_DEST(p) (((p) & 1) == 0)
+#define DMA_PIPE_IS_SRC(p) (((p) & 1) != 0)
+
+/* BAM DMA pipe state */
+enum bamdma_pipe_state {
+ PIPE_INACTIVE = 0,
+ PIPE_ACTIVE
+};
+
+/* BAM DMA channel state */
+enum bamdma_chan_state {
+ DMA_CHAN_STATE_FREE = 0,
+ DMA_CHAN_STATE_ALLOC_EXT, /* Client allocation */
+ DMA_CHAN_STATE_ALLOC_INT /* Internal (resource mgr) allocation */
+};
+
+struct bamdma_chan {
+ /* Allocation state */
+ enum bamdma_chan_state state;
+
+ /* BAM DMA channel configuration parameters */
+ u32 threshold;
+ enum sps_dma_priority priority;
+
+ /* HWIO channel configuration parameters */
+ enum bam_dma_thresh_dma thresh;
+ enum bam_dma_weight_dma weight;
+
+};
+
+/* BAM DMA device state */
+struct bamdma_device {
+ /* BAM-DMA device state */
+ int enabled;
+ int local;
+
+ /* BAM device state */
+ struct sps_bam *bam;
+
+ /* BAM handle, for deregistration */
+ u32 h;
+
+ /* BAM DMA device virtual mapping */
+ void *virt_addr;
+ int virtual_mapped;
+ u32 phys_addr;
+ void *hwio;
+
+ /* BAM DMA pipe/channel state */
+ u32 num_pipes;
+ enum bamdma_pipe_state pipes[DMA_MAX_PIPES];
+ struct bamdma_chan chans[DMA_MAX_PIPES / 2];
+
+};
+
+/* BAM-DMA devices */
+static struct bamdma_device bam_dma_dev[MAX_BAM_DMA_DEVICES];
+static struct mutex bam_dma_lock;
+
+/*
+ * The BAM DMA module registers all BAMs in the BSP properties, but only
+ * uses the first BAM-DMA device for allocations. References to the others
+ * are stored in the following data array.
+ */
+static int num_bams;
+static u32 bam_handles[MAX_BAM_DMA_BAMS];
+
+/**
+ * Find BAM-DMA device
+ *
+ * This function finds the BAM-DMA device associated with the BAM handle.
+ *
+ * @h - BAM handle
+ *
+ * @return - pointer to BAM-DMA device, or NULL on error
+ *
+ */
+static struct bamdma_device *sps_dma_find_device(u32 h)
+{
+ return &bam_dma_dev[0];
+}
+
+/**
+ * BAM DMA device enable
+ *
+ * This function enables a BAM DMA device and the associated BAM.
+ *
+ * @dev - pointer to BAM DMA device context
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_dma_device_enable(struct bamdma_device *dev)
+{
+ if (dev->enabled)
+ return 0;
+
+ /*
+ * If the BAM-DMA device is locally controlled then enable BAM-DMA
+ * device
+ */
+ if (dev->local)
+ dma_write_reg(dev->virt_addr, DMA_ENBL, 1);
+
+ /* Enable BAM device */
+ if (sps_bam_enable(dev->bam)) {
+ SPS_ERR("Failed to enable BAM DMA's BAM: %x", dev->phys_addr);
+ return SPS_ERROR;
+ }
+
+ dev->enabled = true;
+
+ return 0;
+}
+
+/**
+ * BAM DMA device enable
+ *
+ * This function initializes a BAM DMA device.
+ *
+ * @dev - pointer to BAM DMA device context
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_dma_device_disable(struct bamdma_device *dev)
+{
+ u32 pipe_index;
+
+ if (!dev->enabled)
+ return 0;
+
+ /* Do not disable if channels active */
+ for (pipe_index = 0; pipe_index < dev->num_pipes; pipe_index++) {
+ if (dev->pipes[pipe_index] != PIPE_INACTIVE)
+ break;
+ }
+
+ if (pipe_index < dev->num_pipes) {
+ SPS_ERR("Failed to disable BAM-DMA %x: channels are active",
+ dev->phys_addr);
+ return SPS_ERROR;
+ }
+
+ dev->enabled = false;
+
+ /* Disable BAM device */
+ if (sps_bam_disable(dev->bam)) {
+ SPS_ERR("Failed to disable BAM-DMA %x BAM", dev->phys_addr);
+ return SPS_ERROR;
+ }
+
+ /* Is the BAM-DMA device locally controlled? */
+ if (dev->local)
+ /* Disable BAM-DMA device */
+ dma_write_reg(dev->virt_addr, DMA_ENBL, 0);
+
+ return 0;
+}
+
+/**
+ * Initialize BAM DMA device
+ *
+ */
+int sps_dma_device_init(u32 h)
+{
+ struct bamdma_device *dev;
+ struct sps_bam_props *props;
+ u32 chan;
+ int result = SPS_ERROR;
+
+ mutex_lock(&bam_dma_lock);
+
+ /* Find a free BAM-DMA device slot */
+ dev = NULL;
+ if (bam_dma_dev[0].bam != NULL) {
+ SPS_ERR("BAM-DMA BAM device already initialized.");
+ goto exit_err;
+ } else {
+ dev = &bam_dma_dev[0];
+ }
+
+ /* Record BAM */
+ memset(dev, 0, sizeof(*dev));
+ dev->h = h;
+ dev->bam = sps_h2bam(h);
+
+ /* Map the BAM DMA device into virtual space, if necessary */
+ props = &dev->bam->props;
+ dev->phys_addr = props->periph_phys_addr;
+ if (props->periph_virt_addr != NULL) {
+ dev->virt_addr = props->periph_virt_addr;
+ dev->virtual_mapped = false;
+ } else {
+ if (props->periph_virt_size == 0) {
+ SPS_ERR("Unable to map BAM DMA IO memory: %x %x",
+ dev->phys_addr, props->periph_virt_size);
+ goto exit_err;
+ }
+
+ dev->virt_addr = ioremap(dev->phys_addr,
+ props->periph_virt_size);
+ if (dev->virt_addr == NULL) {
+ SPS_ERR("Unable to map BAM DMA IO memory: %x %x",
+ dev->phys_addr, props->periph_virt_size);
+ goto exit_err;
+ }
+ dev->virtual_mapped = true;
+ }
+ dev->hwio = (void *) dev->virt_addr;
+
+ /* Is the BAM-DMA device locally controlled? */
+ if ((props->manage & SPS_BAM_MGR_DEVICE_REMOTE) == 0) {
+ SPS_DBG("BAM-DMA is controlled locally: %x",
+ dev->phys_addr);
+ dev->local = true;
+ } else {
+ SPS_DBG("BAM-DMA is controlled remotely: %x",
+ dev->phys_addr);
+ dev->local = false;
+ }
+
+ /*
+ * Enable the BAM DMA and determine the number of pipes/channels.
+ * Leave the BAM-DMA enabled, since it is always a shared device.
+ */
+ if (sps_dma_device_enable(dev))
+ goto exit_err;
+
+ dev->num_pipes = dev->bam->props.num_pipes;
+
+ /* Disable all channels */
+ if (dev->local)
+ for (chan = 0; chan < (dev->num_pipes / 2); chan++) {
+ dma_write_reg_field(dev->virt_addr,
+ DMA_CHNL_CONFIG(chan),
+ DMA_CHNL_ENABLE, 0);
+ }
+
+ result = 0;
+exit_err:
+ if (result) {
+ if (dev != NULL) {
+ if (dev->virtual_mapped)
+ iounmap(dev->virt_addr);
+
+ dev->bam = NULL;
+ }
+ }
+
+ mutex_unlock(&bam_dma_lock);
+
+ return result;
+}
+
+/**
+ * De-initialize BAM DMA device
+ *
+ */
+int sps_dma_device_de_init(u32 h)
+{
+ struct bamdma_device *dev;
+ u32 pipe_index;
+ u32 chan;
+ int result = 0;
+
+ mutex_lock(&bam_dma_lock);
+
+ dev = sps_dma_find_device(h);
+ if (dev == NULL) {
+ SPS_ERR("BAM-DMA: not registered: %x", h);
+ result = SPS_ERROR;
+ goto exit_err;
+ }
+
+ /* Check for channel leaks */
+ for (chan = 0; chan < dev->num_pipes / 2; chan++) {
+ if (dev->chans[chan].state != DMA_CHAN_STATE_FREE) {
+ SPS_ERR("BAM-DMA: channel not free: %d", chan);
+ result = SPS_ERROR;
+ dev->chans[chan].state = DMA_CHAN_STATE_FREE;
+ }
+ }
+ for (pipe_index = 0; pipe_index < dev->num_pipes; pipe_index++) {
+ if (dev->pipes[pipe_index] != PIPE_INACTIVE) {
+ SPS_ERR("BAM-DMA: pipe not inactive: %d", pipe_index);
+ result = SPS_ERROR;
+ dev->pipes[pipe_index] = PIPE_INACTIVE;
+ }
+ }
+
+ /* Disable BAM and BAM-DMA */
+ if (sps_dma_device_disable(dev))
+ result = SPS_ERROR;
+
+ dev->h = BAM_HANDLE_INVALID;
+ dev->bam = NULL;
+ if (dev->virtual_mapped)
+ iounmap(dev->virt_addr);
+
+exit_err:
+ mutex_unlock(&bam_dma_lock);
+
+ return result;
+}
+
+/**
+ * Initialize BAM DMA module
+ *
+ */
+int sps_dma_init(const struct sps_bam_props *bam_props)
+{
+ struct sps_bam_props props;
+ const struct sps_bam_props *bam_reg;
+ u32 h;
+
+ /* Init local data */
+ memset(&bam_dma_dev, 0, sizeof(bam_dma_dev));
+ num_bams = 0;
+ memset(bam_handles, 0, sizeof(bam_handles));
+
+ /* Create a mutex to control access to the BAM-DMA devices */
+ mutex_init(&bam_dma_lock);
+
+ /* Are there any BAM DMA devices? */
+ if (bam_props == NULL)
+ return 0;
+
+ /*
+ * Registers all BAMs in the BSP properties, but only uses the first
+ * BAM-DMA device for allocations.
+ */
+ if (bam_props->phys_addr) {
+ /* Force multi-EE option for all BAM-DMAs */
+ bam_reg = bam_props;
+ if ((bam_props->options & SPS_BAM_OPT_BAMDMA) &&
+ (bam_props->manage & SPS_BAM_MGR_MULTI_EE) == 0) {
+ SPS_DBG("Setting multi-EE options for BAM-DMA: %x",
+ bam_props->phys_addr);
+ props = *bam_props;
+ props.manage |= SPS_BAM_MGR_MULTI_EE;
+ bam_reg = &props;
+ }
+
+ /* Register the BAM */
+ if (sps_register_bam_device(bam_reg, &h)) {
+ SPS_ERR("Failed to register BAM-DMA BAM device: "
+ "phys 0x%0x", bam_props->phys_addr);
+ return SPS_ERROR;
+ }
+
+ /* Record the BAM so that it may be deregistered later */
+ if (num_bams < MAX_BAM_DMA_BAMS) {
+ bam_handles[num_bams] = h;
+ num_bams++;
+ } else {
+ SPS_ERR("BAM-DMA: BAM limit exceeded: %d", num_bams);
+ return SPS_ERROR;
+ }
+ } else {
+ SPS_ERR("BAM-DMA phys_addr is zero.");
+ return SPS_ERROR;
+ }
+
+
+ return 0;
+}
+
+/**
+ * De-initialize BAM DMA module
+ *
+ */
+void sps_dma_de_init(void)
+{
+ int n;
+
+ /* De-initialize the BAM devices */
+ for (n = 0; n < num_bams; n++)
+ sps_deregister_bam_device(bam_handles[n]);
+
+ /* Clear local data */
+ memset(&bam_dma_dev, 0, sizeof(bam_dma_dev));
+ num_bams = 0;
+ memset(bam_handles, 0, sizeof(bam_handles));
+}
+
+/**
+ * Allocate a BAM DMA channel
+ *
+ */
+int sps_alloc_dma_chan(const struct sps_alloc_dma_chan *alloc,
+ struct sps_dma_chan *chan_info)
+{
+ struct bamdma_device *dev;
+ struct bamdma_chan *chan;
+ u32 pipe_index;
+ enum bam_dma_thresh_dma thresh = (enum bam_dma_thresh_dma) 0;
+ enum bam_dma_weight_dma weight = (enum bam_dma_weight_dma) 0;
+ int result = SPS_ERROR;
+
+ if (alloc == NULL || chan_info == NULL) {
+ SPS_ERR("sps_alloc_dma_chan. invalid parameters");
+ return SPS_ERROR;
+ }
+
+ /* Translate threshold and priority to hwio values */
+ if (alloc->threshold != SPS_DMA_THRESHOLD_DEFAULT) {
+ if (alloc->threshold >= 512)
+ thresh = BAM_DMA_THRESH_512;
+ else if (alloc->threshold >= 256)
+ thresh = BAM_DMA_THRESH_256;
+ else if (alloc->threshold >= 128)
+ thresh = BAM_DMA_THRESH_128;
+ else
+ thresh = BAM_DMA_THRESH_64;
+ }
+
+ weight = alloc->priority;
+
+ if (alloc->priority > BAM_DMA_WEIGHT_HIGH) {
+ SPS_ERR("BAM-DMA: invalid priority: %x", alloc->priority);
+ return SPS_ERROR;
+ }
+
+ mutex_lock(&bam_dma_lock);
+
+ dev = sps_dma_find_device(alloc->dev);
+ if (dev == NULL) {
+ SPS_ERR("BAM-DMA: invalid BAM handle: %x", alloc->dev);
+ goto exit_err;
+ }
+
+ /* Search for a free set of pipes */
+ for (pipe_index = 0, chan = dev->chans;
+ pipe_index < dev->num_pipes; pipe_index += 2, chan++) {
+ if (chan->state == DMA_CHAN_STATE_FREE) {
+ /* Just check pipes for safety */
+ if (dev->pipes[pipe_index] != PIPE_INACTIVE ||
+ dev->pipes[pipe_index + 1] != PIPE_INACTIVE) {
+ SPS_ERR("BAM-DMA: channel %d state error:%d %d",
+ pipe_index / 2, dev->pipes[pipe_index],
+ dev->pipes[pipe_index + 1]);
+ goto exit_err;
+ }
+ break; /* Found free pipe */
+ }
+ }
+
+ if (pipe_index >= dev->num_pipes) {
+ SPS_ERR("BAM-DMA: no free channel. num_pipes = %d",
+ dev->num_pipes);
+ goto exit_err;
+ }
+
+ chan->state = DMA_CHAN_STATE_ALLOC_EXT;
+
+ /* Store config values for use when pipes are activated */
+ chan = &dev->chans[pipe_index / 2];
+ chan->threshold = alloc->threshold;
+ chan->thresh = thresh;
+ chan->priority = alloc->priority;
+ chan->weight = weight;
+
+ SPS_DBG("sps_alloc_dma_chan. pipe %d.\n", pipe_index);
+
+ /* Report allocated pipes to client */
+ chan_info->dev = dev->h;
+ /* Dest/input/write pipex */
+ chan_info->dest_pipe_index = pipe_index;
+ /* Source/output/read pipe */
+ chan_info->src_pipe_index = pipe_index + 1;
+
+ result = 0;
+exit_err:
+ mutex_unlock(&bam_dma_lock);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_alloc_dma_chan);
+
+/**
+ * Free a BAM DMA channel
+ *
+ */
+int sps_free_dma_chan(struct sps_dma_chan *chan)
+{
+ struct bamdma_device *dev;
+ u32 pipe_index;
+ int result = 0;
+
+ if (chan == NULL) {
+ SPS_ERR("sps_free_dma_chan. chan is NULL");
+ return SPS_ERROR;
+ }
+
+ mutex_lock(&bam_dma_lock);
+
+ dev = sps_dma_find_device(chan->dev);
+ if (dev == NULL) {
+ SPS_ERR("BAM-DMA: invalid BAM handle: %x", chan->dev);
+ result = SPS_ERROR;
+ goto exit_err;
+ }
+
+ /* Verify the pipe indices */
+ pipe_index = chan->dest_pipe_index;
+ if (pipe_index >= dev->num_pipes || ((pipe_index & 1)) ||
+ (pipe_index + 1) != chan->src_pipe_index) {
+ SPS_ERR("sps_free_dma_chan. Invalid pipe indices");
+ SPS_DBG("num_pipes=%d.dest=%d.src=%d.",
+ dev->num_pipes,
+ chan->dest_pipe_index,
+ chan->src_pipe_index);
+ result = SPS_ERROR;
+ goto exit_err;
+ }
+
+ /* Are both pipes inactive? */
+ if (dev->chans[pipe_index / 2].state != DMA_CHAN_STATE_ALLOC_EXT ||
+ dev->pipes[pipe_index] != PIPE_INACTIVE ||
+ dev->pipes[pipe_index + 1] != PIPE_INACTIVE) {
+ SPS_ERR("BAM-DMA: attempt to free active chan %d: %d %d",
+ pipe_index / 2, dev->pipes[pipe_index],
+ dev->pipes[pipe_index + 1]);
+ result = SPS_ERROR;
+ goto exit_err;
+ }
+
+ /* Free the channel */
+ dev->chans[pipe_index / 2].state = DMA_CHAN_STATE_FREE;
+
+exit_err:
+ mutex_unlock(&bam_dma_lock);
+
+ return result;
+}
+EXPORT_SYMBOL(sps_free_dma_chan);
+
+/**
+ * Activate a BAM DMA pipe
+ *
+ * This function activates a BAM DMA pipe.
+ *
+ * @dev - pointer to BAM-DMA device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static u32 sps_dma_check_pipes(struct bamdma_device *dev, u32 pipe_index)
+{
+ u32 pipe_in;
+ u32 pipe_out;
+ int enabled_in;
+ int enabled_out;
+ u32 check;
+
+ pipe_in = pipe_index & ~1;
+ pipe_out = pipe_in + 1;
+ enabled_in = bam_pipe_is_enabled(dev->bam->base, pipe_in);
+ enabled_out = bam_pipe_is_enabled(dev->bam->base, pipe_out);
+
+ if (!enabled_in && !enabled_out)
+ check = DMA_PIPES_BOTH_DISABLED;
+ else if (enabled_in && enabled_out)
+ check = DMA_PIPES_BOTH_ENABLED;
+ else
+ check = DMA_PIPES_STATE_DIFF;
+
+ return check;
+}
+
+/**
+ * Allocate a BAM DMA pipe
+ *
+ */
+int sps_dma_pipe_alloc(void *bam_arg, u32 pipe_index, enum sps_mode dir)
+{
+ struct sps_bam *bam = bam_arg;
+ struct bamdma_device *dev;
+ struct bamdma_chan *chan;
+ u32 channel;
+ int result = SPS_ERROR;
+
+ if (bam == NULL) {
+ SPS_ERR("BAM context is NULL");
+ return SPS_ERROR;
+ }
+
+ /* Check pipe direction */
+ if ((DMA_PIPE_IS_DEST(pipe_index) && dir != SPS_MODE_DEST) ||
+ (DMA_PIPE_IS_SRC(pipe_index) && dir != SPS_MODE_SRC)) {
+ SPS_ERR("BAM-DMA: wrong direction for BAM %x pipe %d",
+ bam->props.phys_addr, pipe_index);
+ return SPS_ERROR;
+ }
+
+ mutex_lock(&bam_dma_lock);
+
+ dev = sps_dma_find_device((u32) bam);
+ if (dev == NULL) {
+ SPS_ERR("BAM-DMA: invalid BAM: %x",
+ bam->props.phys_addr);
+ goto exit_err;
+ }
+ if (pipe_index >= dev->num_pipes) {
+ SPS_ERR("BAM-DMA: BAM %x invalid pipe: %d",
+ bam->props.phys_addr, pipe_index);
+ goto exit_err;
+ }
+ if (dev->pipes[pipe_index] != PIPE_INACTIVE) {
+ SPS_ERR("BAM-DMA: BAM %x pipe %d already active",
+ bam->props.phys_addr, pipe_index);
+ goto exit_err;
+ }
+
+ /* Mark pipe active */
+ dev->pipes[pipe_index] = PIPE_ACTIVE;
+
+ /* If channel is not allocated, make an internal allocation */
+ channel = pipe_index / 2;
+ chan = &dev->chans[channel];
+ if (chan->state != DMA_CHAN_STATE_ALLOC_EXT &&
+ chan->state != DMA_CHAN_STATE_ALLOC_INT) {
+ chan->state = DMA_CHAN_STATE_ALLOC_INT;
+ }
+
+ result = 0;
+exit_err:
+ mutex_unlock(&bam_dma_lock);
+
+ return result;
+}
+
+/**
+ * Enable a BAM DMA pipe
+ *
+ */
+int sps_dma_pipe_enable(void *bam_arg, u32 pipe_index)
+{
+ struct sps_bam *bam = bam_arg;
+ struct bamdma_device *dev;
+ struct bamdma_chan *chan;
+ u32 channel;
+ int result = SPS_ERROR;
+
+ SPS_DBG("sps_dma_pipe_enable.pipe %d", pipe_index);
+
+ mutex_lock(&bam_dma_lock);
+
+ dev = sps_dma_find_device((u32) bam);
+ if (dev == NULL) {
+ SPS_ERR("BAM-DMA: invalid BAM");
+ goto exit_err;
+ }
+ if (pipe_index >= dev->num_pipes) {
+ SPS_ERR("BAM-DMA: BAM %x invalid pipe: %d",
+ bam->props.phys_addr, pipe_index);
+ goto exit_err;
+ }
+ if (dev->pipes[pipe_index] != PIPE_ACTIVE) {
+ SPS_ERR("BAM-DMA: BAM %x pipe %d not active",
+ bam->props.phys_addr, pipe_index);
+ goto exit_err;
+ }
+
+ /*
+ * The channel must be enabled when the dest/input/write pipe
+ * is enabled
+ */
+ if (DMA_PIPE_IS_DEST(pipe_index)) {
+ /* Configure and enable the channel */
+ channel = pipe_index / 2;
+ chan = &dev->chans[channel];
+
+ if (chan->threshold != SPS_DMA_THRESHOLD_DEFAULT)
+ dma_write_reg_field(dev->virt_addr,
+ DMA_CHNL_CONFIG(channel),
+ DMA_CHNL_ACT_THRESH,
+ chan->thresh);
+
+ if (chan->priority != SPS_DMA_PRI_DEFAULT)
+ dma_write_reg_field(dev->virt_addr,
+ DMA_CHNL_CONFIG(channel),
+ DMA_CHNL_WEIGHT,
+ chan->weight);
+
+ dma_write_reg_field(dev->virt_addr,
+ DMA_CHNL_CONFIG(channel),
+ DMA_CHNL_ENABLE, 1);
+ }
+
+ result = 0;
+exit_err:
+ mutex_unlock(&bam_dma_lock);
+
+ return result;
+}
+
+/**
+ * Deactivate a BAM DMA pipe
+ *
+ * This function deactivates a BAM DMA pipe.
+ *
+ * @dev - pointer to BAM-DMA device descriptor
+ *
+ * @bam - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_dma_deactivate_pipe_atomic(struct bamdma_device *dev,
+ struct sps_bam *bam,
+ u32 pipe_index)
+{
+ u32 channel;
+
+ if (dev->bam != bam)
+ return SPS_ERROR;
+ if (pipe_index >= dev->num_pipes)
+ return SPS_ERROR;
+ if (dev->pipes[pipe_index] != PIPE_ACTIVE)
+ return SPS_ERROR; /* Pipe is not active */
+
+ SPS_DBG("BAM-DMA: deactivate pipe %d", pipe_index);
+
+ /* Mark pipe inactive */
+ dev->pipes[pipe_index] = PIPE_INACTIVE;
+
+ /*
+ * Channel must be reset when either pipe is disabled, so just always
+ * reset regardless of other pipe's state
+ */
+ channel = pipe_index / 2;
+ dma_write_reg_field(dev->virt_addr, DMA_CHNL_CONFIG(channel),
+ DMA_CHNL_ENABLE, 0);
+
+ /* If the peer pipe is also inactive, reset the channel */
+ if (sps_dma_check_pipes(dev, pipe_index) == DMA_PIPES_BOTH_DISABLED) {
+ /* Free channel if allocated internally */
+ if (dev->chans[channel].state == DMA_CHAN_STATE_ALLOC_INT)
+ dev->chans[channel].state = DMA_CHAN_STATE_FREE;
+ }
+
+ return 0;
+}
+
+/**
+ * Free a BAM DMA pipe
+ *
+ */
+int sps_dma_pipe_free(void *bam_arg, u32 pipe_index)
+{
+ struct bamdma_device *dev;
+ struct sps_bam *bam = bam_arg;
+ int result;
+
+ mutex_lock(&bam_dma_lock);
+
+ dev = sps_dma_find_device((u32) bam);
+ if (dev == NULL) {
+ SPS_ERR("BAM-DMA: invalid BAM");
+ result = SPS_ERROR;
+ goto exit_err;
+ }
+
+ result = sps_dma_deactivate_pipe_atomic(dev, bam, pipe_index);
+
+exit_err:
+ mutex_unlock(&bam_dma_lock);
+
+ return result;
+}
+
+/**
+ * Get the BAM handle for BAM-DMA.
+ *
+ * The BAM handle should be use as source/destination in the sps_connect().
+ *
+ * @return bam handle on success, zero on error
+ */
+u32 sps_dma_get_bam_handle(void)
+{
+ return (u32) bam_dma_dev[0].bam;
+}
+EXPORT_SYMBOL(sps_dma_get_bam_handle);
+
+/**
+ * Free the BAM handle for BAM-DMA.
+ *
+ */
+void sps_dma_free_bam_handle(u32 h)
+{
+}
+EXPORT_SYMBOL(sps_dma_free_bam_handle);
+
+#endif /* CONFIG_SPS_SUPPORT_BAMDMA */
diff --git a/arch/arm/mach-msm/sps/sps_map.c b/arch/arm/mach-msm/sps/sps_map.c
new file mode 100644
index 0000000..16d5065
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_map.c
@@ -0,0 +1,137 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Connection mapping table managment for SPS device driver.
+ */
+
+#include <linux/types.h> /* u32 */
+#include <linux/kernel.h> /* pr_info() */
+#include <linux/memory.h> /* memset */
+
+#include "spsi.h"
+
+/* Module state */
+struct sps_map_state {
+ const struct sps_map *maps;
+ u32 num_maps;
+ u32 options;
+};
+
+static struct sps_map_state sps_maps;
+
+/**
+ * Initialize connection mapping module
+ *
+ */
+int sps_map_init(const struct sps_map *map_props, u32 options)
+{
+ const struct sps_map *maps;
+
+ /* Are there any connection mappings? */
+ memset(&sps_maps, 0, sizeof(sps_maps));
+ if (map_props == NULL)
+ return 0;
+
+ /* Init the module state */
+ sps_maps.maps = map_props;
+ sps_maps.options = options;
+ for (maps = sps_maps.maps;; maps++, sps_maps.num_maps++)
+ if (maps->src.periph_class == SPS_CLASS_INVALID &&
+ maps->src.periph_phy_addr == SPS_ADDR_INVALID)
+ break;
+
+ SPS_DBG("SPS driver: %d mappings", sps_maps.num_maps);
+
+ return 0;
+}
+
+/**
+ * De-initialize connection mapping module
+ *
+ */
+void sps_map_de_init(void)
+{
+ memset(&sps_maps, 0, sizeof(sps_maps));
+}
+
+/**
+ * Find matching connection mapping
+ *
+ */
+int sps_map_find(struct sps_connect *connect)
+{
+ const struct sps_map *map;
+ u32 i;
+ void *desc;
+ void *data;
+
+ /* Are there any connection mappings? */
+ if (sps_maps.num_maps == 0)
+ return SPS_ERROR;
+
+ /* Search the mapping table for a match to the specified connection */
+ for (i = sps_maps.num_maps, map = sps_maps.maps;
+ i > 0; i--, map++)
+ if (map->src.periph_class == (u32) connect->source &&
+ map->dest.periph_class == (u32) connect->destination
+ && map->config == (u32) connect->config)
+ break;
+
+ if (i == 0)
+ return SPS_ERROR;
+
+ /*
+ * Before modifying client parameter struct, perform all
+ * operations that might fail
+ */
+ desc = spsi_get_mem_ptr(map->desc_base);
+ if (desc == NULL) {
+ SPS_ERR("Cannot get virt addr for I/O buffer: 0x%x",
+ map->desc_base);
+ return SPS_ERROR;
+ }
+
+ if (map->data_size > 0 && map->data_base != SPS_ADDR_INVALID) {
+ data = spsi_get_mem_ptr(map->data_base);
+ if (data == NULL) {
+ SPS_ERR("Cannot get virt addr for I/O buffer: 0x%x",
+ map->data_base);
+ return SPS_ERROR;
+ }
+ } else {
+ data = NULL;
+ }
+
+ /* Copy mapping values to client parameter struct */
+ if (connect->source != SPS_DEV_HANDLE_MEM)
+ connect->src_pipe_index = map->src.pipe_index;
+
+ if (connect->destination != SPS_DEV_HANDLE_MEM)
+ connect->dest_pipe_index = map->dest.pipe_index;
+
+ if (connect->mode == SPS_MODE_SRC)
+ connect->event_thresh = map->src.event_thresh;
+ else
+ connect->event_thresh = map->dest.event_thresh;
+
+ connect->desc.size = map->desc_size;
+ connect->desc.phys_base = map->desc_base;
+ connect->desc.base = desc;
+ if (map->data_size > 0 && map->data_base != SPS_ADDR_INVALID) {
+ connect->data.size = map->data_size;
+ connect->data.phys_base = map->data_base;
+ connect->data.base = data;
+ }
+
+ return 0;
+}
diff --git a/arch/arm/mach-msm/sps/sps_map.h b/arch/arm/mach-msm/sps/sps_map.h
new file mode 100644
index 0000000..692e47c
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_map.h
@@ -0,0 +1,46 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* SPS driver mapping table data declarations. */
+
+
+#ifndef _SPS_MAP_H_
+#define _SPS_MAP_H_
+
+#include <linux/types.h> /* u32 */
+
+/* End point parameters */
+struct sps_map_end_point {
+ u32 periph_class; /* Peripheral device enumeration class */
+ u32 periph_phy_addr; /* Peripheral base address */
+ u32 pipe_index; /* Pipe index */
+ u32 event_thresh; /* Pipe event threshold */
+};
+
+/* Mapping connection descriptor */
+struct sps_map {
+ /* Source end point parameters */
+ struct sps_map_end_point src;
+
+ /* Destination end point parameters */
+ struct sps_map_end_point dest;
+
+ /* Resource parameters */
+ u32 config; /* Configuration (stream) identifier */
+ u32 desc_base; /* Physical address of descriptor FIFO */
+ u32 desc_size; /* Size (bytes) of descriptor FIFO */
+ u32 data_base; /* Physical address of data FIFO */
+ u32 data_size; /* Size (bytes) of data FIFO */
+
+};
+
+#endif /* _SPS_MAP_H_ */
diff --git a/arch/arm/mach-msm/sps/sps_mem.c b/arch/arm/mach-msm/sps/sps_mem.c
new file mode 100644
index 0000000..68ce55a
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_mem.c
@@ -0,0 +1,156 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Pipe-Memory allocation/free managment.
+ */
+
+#include <linux/types.h> /* u32 */
+#include <linux/kernel.h> /* pr_info() */
+#include <linux/io.h> /* ioremap() */
+#include <linux/mutex.h> /* mutex */
+#include <linux/list.h> /* list_head */
+#include <linux/genalloc.h> /* gen_pool_alloc() */
+#include <linux/errno.h> /* ENOMEM */
+
+#include "sps_bam.h"
+#include "spsi.h"
+
+static u32 iomem_phys;
+static void *iomem_virt;
+static u32 iomem_size;
+static u32 iomem_offset;
+static struct gen_pool *pool;
+static u32 nid = 0xaa;
+
+/* Debug */
+static u32 total_alloc;
+static u32 total_free;
+
+/**
+ * Translate physical to virtual address
+ *
+ */
+void *spsi_get_mem_ptr(u32 phys_addr)
+{
+ void *virt = NULL;
+
+ if ((phys_addr >= iomem_phys) &&
+ (phys_addr < (iomem_phys + iomem_size))) {
+ virt = (u8 *) iomem_virt + (phys_addr - iomem_phys);
+ } else {
+ virt = phys_to_virt(phys_addr);
+ SPS_ERR("sps:spsi_get_mem_ptr.invalid phys addr=0x%x.",
+ phys_addr);
+ }
+ return virt;
+}
+
+/**
+ * Allocate I/O (pipe) memory
+ *
+ */
+u32 sps_mem_alloc_io(u32 bytes)
+{
+ u32 phys_addr = SPS_ADDR_INVALID;
+ u32 virt_addr = 0;
+
+ virt_addr = gen_pool_alloc(pool, bytes);
+ if (virt_addr) {
+ iomem_offset = virt_addr - (u32) iomem_virt;
+ phys_addr = iomem_phys + iomem_offset;
+ total_alloc += bytes;
+ } else {
+ SPS_ERR("sps:gen_pool_alloc %d bytes fail.", bytes);
+ return SPS_ADDR_INVALID;
+ }
+
+ SPS_DBG("sps:sps_mem_alloc_io.phys=0x%x.virt=0x%x.size=0x%x.",
+ phys_addr, virt_addr, bytes);
+
+ return phys_addr;
+}
+
+/**
+ * Free I/O memory
+ *
+ */
+void sps_mem_free_io(u32 phys_addr, u32 bytes)
+{
+ u32 virt_addr = 0;
+
+ iomem_offset = phys_addr - iomem_phys;
+ virt_addr = (u32) iomem_virt + iomem_offset;
+
+ SPS_DBG("sps:sps_mem_free_io.phys=0x%x.virt=0x%x.size=0x%x.",
+ phys_addr, virt_addr, bytes);
+
+ gen_pool_free(pool, virt_addr, bytes);
+ total_free += bytes;
+}
+
+/**
+ * Initialize driver memory module
+ *
+ */
+int sps_mem_init(u32 pipemem_phys_base, u32 pipemem_size)
+{
+ int res;
+ /* 2^8=128. The desc-fifo and data-fifo minimal allocation. */
+ int min_alloc_order = 8;
+
+ iomem_phys = pipemem_phys_base;
+ iomem_size = pipemem_size;
+
+ if (iomem_phys == 0) {
+ SPS_ERR("sps:Invalid Pipe-Mem address");
+ return SPS_ERROR;
+ } else {
+ iomem_virt = ioremap(iomem_phys, iomem_size);
+ if (!iomem_virt) {
+ SPS_ERR("sps:Failed to IO map pipe memory.\n");
+ return -ENOMEM;
+ }
+ }
+
+ iomem_offset = 0;
+ SPS_DBG("sps:sps_mem_init.iomem_phys=0x%x,iomem_virt=0x%x.",
+ iomem_phys, (u32) iomem_virt);
+
+ pool = gen_pool_create(min_alloc_order, nid);
+ res = gen_pool_add(pool, (u32) iomem_virt, iomem_size, nid);
+ if (res)
+ return res;
+
+ return 0;
+}
+
+/**
+ * De-initialize driver memory module
+ *
+ */
+int sps_mem_de_init(void)
+{
+ if (iomem_virt != NULL) {
+ gen_pool_destroy(pool);
+ pool = NULL;
+ iounmap(iomem_virt);
+ iomem_virt = NULL;
+ }
+
+ if (total_alloc == total_free)
+ return 0;
+ else {
+ SPS_ERR("sps:sps_mem_de_init:some memory not free");
+ return SPS_ERROR;
+ }
+}
diff --git a/arch/arm/mach-msm/sps/sps_rm.c b/arch/arm/mach-msm/sps/sps_rm.c
new file mode 100644
index 0000000..ec36b25
--- /dev/null
+++ b/arch/arm/mach-msm/sps/sps_rm.c
@@ -0,0 +1,806 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/* Resource management for the SPS device driver. */
+
+#include <linux/types.h> /* u32 */
+#include <linux/kernel.h> /* pr_info() */
+#include <linux/mutex.h> /* mutex */
+#include <linux/list.h> /* list_head */
+#include <linux/slab.h> /* kzalloc() */
+#include <linux/memory.h> /* memset */
+
+#include "spsi.h"
+#include "sps_core.h"
+
+/* "Clear" value for the connection parameter struct */
+#define SPSRM_CLEAR 0xcccccccc
+
+/* Max BAM FIFO sizes */
+#define SPSRM_MAX_DESC_FIFO_SIZE 0xffff
+#define SPSRM_MAX_DATA_FIFO_SIZE 0xffff
+
+/* Connection control struct pointer */
+static struct sps_rm *sps_rm;
+
+/**
+ * Initialize resource manager module
+ */
+int sps_rm_init(struct sps_rm *rm, u32 options)
+{
+ /* Set the resource manager state struct pointer */
+ sps_rm = rm;
+
+ /* Initialize the state struct */
+ INIT_LIST_HEAD(&sps_rm->connections_q);
+ mutex_init(&sps_rm->lock);
+
+ return 0;
+}
+
+/**
+ * Initialize client state context
+ *
+ */
+void sps_rm_config_init(struct sps_connect *connect)
+{
+ memset(connect, SPSRM_CLEAR, sizeof(*connect));
+}
+
+/**
+ * Remove reference to connection mapping
+ *
+ * This function removes a reference from a connection mapping struct.
+ *
+ * @map - pointer to connection mapping struct
+ *
+ */
+static void sps_rm_remove_ref(struct sps_connection *map)
+{
+ /* Free this connection */
+ map->refs--;
+ if (map->refs <= 0) {
+ if (map->client_src != NULL || map->client_dest != NULL)
+ SPS_ERR("Failed to allocate connection struct");
+
+ list_del(&map->list);
+ kfree(map);
+ }
+}
+
+/**
+ * Compare map to connect parameters
+ *
+ * This function compares client connect parameters to an allocated
+ * connection mapping.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ * @return - true if match, false otherwise
+ *
+ */
+static int sps_rm_map_match(const struct sps_connect *cfg,
+ const struct sps_connection *map)
+{
+ if (cfg->source != map->src.dev ||
+ cfg->destination != map->dest.dev)
+ return false;
+
+ if (cfg->src_pipe_index != SPSRM_CLEAR &&
+ cfg->src_pipe_index != map->src.pipe_index)
+ return false;
+
+ if (cfg->dest_pipe_index != SPSRM_CLEAR &&
+ cfg->dest_pipe_index != map->dest.pipe_index)
+ return false;
+
+ if (cfg->config != map->config)
+ return false;
+
+ if (cfg->desc.size != SPSRM_CLEAR) {
+ if (cfg->desc.size != map->desc.size)
+ return false;
+
+ if (cfg->desc.phys_base != SPSRM_CLEAR &&
+ cfg->desc.base != (void *)SPSRM_CLEAR &&
+ (cfg->desc.phys_base != map->desc.phys_base ||
+ cfg->desc.base != map->desc.base)) {
+ return false;
+ }
+ }
+
+ if (cfg->data.size != SPSRM_CLEAR) {
+ if (cfg->data.size != map->data.size)
+ return false;
+
+ if (cfg->data.phys_base != SPSRM_CLEAR &&
+ cfg->data.base != (void *)SPSRM_CLEAR &&
+ (cfg->data.phys_base != map->data.phys_base ||
+ cfg->data.base != map->data.base))
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * Find unconnected mapping
+ *
+ * This function finds an allocated a connection mapping.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ * @return - pointer to allocated connection mapping, or NULL if not found
+ *
+ */
+static struct sps_connection *find_unconnected(struct sps_pipe *pipe)
+{
+ struct sps_connect *cfg = &pipe->connect;
+ struct sps_connection *map;
+
+ /* Has this connection already been allocated? */
+ list_for_each_entry(map, &sps_rm->connections_q, list) {
+ if (sps_rm_map_match(cfg, map))
+ if ((cfg->mode == SPS_MODE_SRC
+ && map->client_src == NULL)
+ || (cfg->mode != SPS_MODE_SRC
+ && map->client_dest == NULL))
+ return map; /* Found */
+ }
+
+ return NULL; /* Not Found */
+}
+
+/**
+ * Assign connection to client
+ *
+ * This function assigns a connection to a client.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ * @map - connection mapping
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_rm_assign(struct sps_pipe *pipe,
+ struct sps_connection *map)
+{
+ struct sps_connect *cfg = &pipe->connect;
+
+ /* Check ownership and BAM */
+ if ((cfg->mode == SPS_MODE_SRC && map->client_src != NULL) ||
+ (cfg->mode != SPS_MODE_SRC && map->client_dest != NULL))
+ /* The end point is already connected */
+ return SPS_ERROR;
+
+ /* Check whether this end point is a BAM (not memory) */
+ if ((cfg->mode == SPS_MODE_SRC && map->src.bam == NULL) ||
+ (cfg->mode != SPS_MODE_SRC && map->dest.bam == NULL))
+ return SPS_ERROR;
+
+ /* Record the connection assignment */
+ if (cfg->mode == SPS_MODE_SRC) {
+ map->client_src = pipe;
+ pipe->bam = map->src.bam;
+ pipe->pipe_index = map->src.pipe_index;
+ if (pipe->connect.event_thresh != SPSRM_CLEAR)
+ map->src.event_threshold = pipe->connect.event_thresh;
+ } else {
+ map->client_dest = pipe;
+ pipe->bam = map->dest.bam;
+ pipe->pipe_index = map->dest.pipe_index;
+ if (pipe->connect.event_thresh != SPSRM_CLEAR)
+ map->dest.event_threshold =
+ pipe->connect.event_thresh;
+ }
+ pipe->map = map;
+
+ SPS_DBG("sps:sps_rm_assign.pipe_index=%d\n", pipe->pipe_index);
+
+ /* Copy parameters to client connect state */
+ pipe->connect.src_pipe_index = map->src.pipe_index;
+ pipe->connect.dest_pipe_index = map->dest.pipe_index;
+ pipe->connect.desc = map->desc;
+ pipe->connect.data = map->data;
+
+ pipe->client_state = SPS_STATE_ALLOCATE;
+
+ return 0;
+}
+
+/**
+ * Free connection mapping resources
+ *
+ * This function frees a connection mapping resources.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ */
+static void sps_rm_free_map_rsrc(struct sps_connection *map)
+{
+ struct sps_bam *bam;
+
+ if (map->client_src != NULL || map->client_dest != NULL)
+ return;
+
+ if (map->alloc_src_pipe != SPS_BAM_PIPE_INVALID) {
+ bam = map->src.bam;
+ sps_bam_pipe_free(bam, map->src.pipe_index);
+
+ /* Is this a BAM-DMA pipe? */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ if ((bam->props.options & SPS_BAM_OPT_BAMDMA))
+ /* Deallocate and free the BAM-DMA channel */
+ sps_dma_pipe_free(bam, map->src.pipe_index);
+#endif
+ map->alloc_src_pipe = SPS_BAM_PIPE_INVALID;
+ map->src.pipe_index = SPS_BAM_PIPE_INVALID;
+ }
+ if (map->alloc_dest_pipe != SPS_BAM_PIPE_INVALID) {
+ bam = map->dest.bam;
+ sps_bam_pipe_free(bam, map->dest.pipe_index);
+
+ /* Is this a BAM-DMA pipe? */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ if ((bam->props.options & SPS_BAM_OPT_BAMDMA)) {
+ /* Deallocate the BAM-DMA channel */
+ sps_dma_pipe_free(bam, map->dest.pipe_index);
+ }
+#endif
+ map->alloc_dest_pipe = SPS_BAM_PIPE_INVALID;
+ map->dest.pipe_index = SPS_BAM_PIPE_INVALID;
+ }
+ if (map->alloc_desc_base != SPS_ADDR_INVALID) {
+ sps_mem_free_io(map->alloc_desc_base, map->desc.size);
+
+ map->alloc_desc_base = SPS_ADDR_INVALID;
+ map->desc.phys_base = SPS_ADDR_INVALID;
+ }
+ if (map->alloc_data_base != SPS_ADDR_INVALID) {
+ sps_mem_free_io(map->alloc_data_base, map->data.size);
+
+ map->alloc_data_base = SPS_ADDR_INVALID;
+ map->data.phys_base = SPS_ADDR_INVALID;
+ }
+}
+
+/**
+ * Init connection mapping from client connect
+ *
+ * This function initializes a connection mapping from the client's
+ * connect parameters.
+ *
+ * @map - connection mapping struct
+ *
+ * @cfg - client connect parameters
+ *
+ * @return - pointer to allocated connection mapping, or NULL on error
+ *
+ */
+static void sps_rm_init_map(struct sps_connection *map,
+ const struct sps_connect *cfg)
+{
+ /* Clear the connection mapping struct */
+ memset(map, 0, sizeof(*map));
+ map->desc.phys_base = SPS_ADDR_INVALID;
+ map->data.phys_base = SPS_ADDR_INVALID;
+ map->alloc_desc_base = SPS_ADDR_INVALID;
+ map->alloc_data_base = SPS_ADDR_INVALID;
+ map->alloc_src_pipe = SPS_BAM_PIPE_INVALID;
+ map->alloc_dest_pipe = SPS_BAM_PIPE_INVALID;
+
+ /* Copy client required parameters */
+ map->src.dev = cfg->source;
+ map->dest.dev = cfg->destination;
+ map->desc.size = cfg->desc.size;
+ map->data.size = cfg->data.size;
+ map->config = cfg->config;
+
+ /* Did client specify descriptor FIFO? */
+ if (map->desc.size != SPSRM_CLEAR &&
+ cfg->desc.phys_base != SPSRM_CLEAR &&
+ cfg->desc.base != (void *)SPSRM_CLEAR)
+ map->desc = cfg->desc;
+
+ /* Did client specify data FIFO? */
+ if (map->data.size != SPSRM_CLEAR &&
+ cfg->data.phys_base != SPSRM_CLEAR &&
+ cfg->data.base != (void *)SPSRM_CLEAR)
+ map->data = cfg->data;
+
+ /* Did client specify source pipe? */
+ if (cfg->src_pipe_index != SPSRM_CLEAR)
+ map->src.pipe_index = cfg->src_pipe_index;
+ else
+ map->src.pipe_index = SPS_BAM_PIPE_INVALID;
+
+
+ /* Did client specify destination pipe? */
+ if (cfg->dest_pipe_index != SPSRM_CLEAR)
+ map->dest.pipe_index = cfg->dest_pipe_index;
+ else
+ map->dest.pipe_index = SPS_BAM_PIPE_INVALID;
+}
+
+/**
+ * Create a new connection mapping
+ *
+ * This function creates a new connection mapping.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ * @return - pointer to allocated connection mapping, or NULL on error
+ *
+ */
+static struct sps_connection *sps_rm_create(struct sps_pipe *pipe)
+{
+ struct sps_connection *map;
+ struct sps_bam *bam;
+ u32 desc_size;
+ u32 data_size;
+ enum sps_mode dir;
+ int success = false;
+
+ /* Allocate new connection */
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (map == NULL) {
+ SPS_ERR("Failed to allocate connection struct");
+ return NULL;
+ }
+
+ /* Initialize connection struct */
+ sps_rm_init_map(map, &pipe->connect);
+ dir = pipe->connect.mode;
+
+ /* Use a do/while() loop to avoid a "goto" */
+ success = false;
+ /* Get BAMs */
+ map->src.bam = sps_h2bam(map->src.dev);
+ if (map->src.bam == NULL) {
+ if (map->src.dev != SPS_DEV_HANDLE_MEM) {
+ SPS_ERR("Invalid BAM handle: 0x%x", map->src.dev);
+ goto exit_err;
+ }
+ map->src.pipe_index = SPS_BAM_PIPE_INVALID;
+ }
+ map->dest.bam = sps_h2bam(map->dest.dev);
+ if (map->dest.bam == NULL) {
+ if (map->dest.dev != SPS_DEV_HANDLE_MEM) {
+ SPS_ERR("Invalid BAM handle: 0x%x", map->dest.dev);
+ goto exit_err;
+ }
+ map->dest.pipe_index = SPS_BAM_PIPE_INVALID;
+ }
+
+ /* Check the BAM device for the pipe */
+ if ((dir == SPS_MODE_SRC && map->src.bam == NULL) ||
+ (dir != SPS_MODE_SRC && map->dest.bam == NULL)) {
+ SPS_ERR("Invalid BAM endpt: dir %d src 0x%x dest 0x%x",
+ dir, map->src.dev, map->dest.dev);
+ goto exit_err;
+ }
+
+ /* Allocate pipes and copy BAM parameters */
+ if (map->src.bam != NULL) {
+ /* Allocate the pipe */
+ bam = map->src.bam;
+ map->alloc_src_pipe = sps_bam_pipe_alloc(bam,
+ map->src.pipe_index);
+ if (map->alloc_src_pipe == SPS_BAM_PIPE_INVALID)
+ goto exit_err;
+ map->src.pipe_index = map->alloc_src_pipe;
+
+ /* Is this a BAM-DMA pipe? */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ if ((bam->props.options & SPS_BAM_OPT_BAMDMA)) {
+ int rc;
+ /* Allocate the BAM-DMA channel */
+ rc = sps_dma_pipe_alloc(bam, map->src.pipe_index,
+ SPS_MODE_SRC);
+ if (rc) {
+ SPS_ERR("Failed to alloc BAM-DMA pipe: %d",
+ map->src.pipe_index);
+ goto exit_err;
+ }
+ }
+#endif
+ map->src.bam_phys = bam->props.phys_addr;
+ map->src.event_threshold = bam->props.event_threshold;
+ }
+ if (map->dest.bam != NULL) {
+ /* Allocate the pipe */
+ bam = map->dest.bam;
+ map->alloc_dest_pipe = sps_bam_pipe_alloc(bam,
+ map->dest.pipe_index);
+ if (map->alloc_dest_pipe == SPS_BAM_PIPE_INVALID)
+ goto exit_err;
+
+ map->dest.pipe_index = map->alloc_dest_pipe;
+
+ /* Is this a BAM-DMA pipe? */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ if ((bam->props.options & SPS_BAM_OPT_BAMDMA)) {
+ int rc;
+ /* Allocate the BAM-DMA channel */
+ rc = sps_dma_pipe_alloc(bam, map->dest.pipe_index,
+ SPS_MODE_DEST);
+ if (rc) {
+ SPS_ERR("Failed to alloc BAM-DMA pipe: %d",
+ map->dest.pipe_index);
+ goto exit_err;
+ }
+ }
+#endif
+ map->dest.bam_phys = bam->props.phys_addr;
+ map->dest.event_threshold =
+ bam->props.event_threshold;
+ }
+
+ /* Get default FIFO sizes */
+ desc_size = 0;
+ data_size = 0;
+ if (map->src.bam != NULL) {
+ bam = map->src.bam;
+ desc_size = bam->props.desc_size;
+ data_size = bam->props.data_size;
+ }
+ if (map->dest.bam != NULL) {
+ bam = map->dest.bam;
+ if (bam->props.desc_size > desc_size)
+ desc_size = bam->props.desc_size;
+ if (bam->props.data_size > data_size)
+ data_size = bam->props.data_size;
+ }
+
+ /* Set FIFO sizes */
+ if (map->desc.size == SPSRM_CLEAR)
+ map->desc.size = desc_size;
+ if (map->src.bam != NULL && map->dest.bam != NULL) {
+ /* BAM-to-BAM requires data FIFO */
+ if (map->data.size == SPSRM_CLEAR)
+ map->data.size = data_size;
+ } else {
+ map->data.size = 0;
+ }
+ if (map->desc.size > SPSRM_MAX_DESC_FIFO_SIZE) {
+ SPS_ERR("Invalid desc FIFO size: 0x%x", map->desc.size);
+ goto exit_err;
+ }
+ if (map->src.bam != NULL && map->dest.bam != NULL &&
+ map->data.size > SPSRM_MAX_DATA_FIFO_SIZE) {
+ SPS_ERR("Invalid data FIFO size: 0x%x", map->data.size);
+ goto exit_err;
+ }
+
+ /* Allocate descriptor FIFO if necessary */
+ if (map->desc.size && map->desc.phys_base == SPS_ADDR_INVALID) {
+ map->alloc_desc_base = sps_mem_alloc_io(map->desc.size);
+ if (map->alloc_desc_base == SPS_ADDR_INVALID) {
+ SPS_ERR("I/O memory allocation failure: 0x%x",
+ map->desc.size);
+ goto exit_err;
+ }
+ map->desc.phys_base = map->alloc_desc_base;
+ map->desc.base = spsi_get_mem_ptr(map->desc.phys_base);
+ if (map->desc.base == NULL) {
+ SPS_ERR("Cannot get virt addr for I/O buffer: 0x%x",
+ map->desc.phys_base);
+ goto exit_err;
+ }
+ }
+
+ /* Allocate data FIFO if necessary */
+ if (map->data.size && map->data.phys_base == SPS_ADDR_INVALID) {
+ map->alloc_data_base = sps_mem_alloc_io(map->data.size);
+ if (map->alloc_data_base == SPS_ADDR_INVALID) {
+ SPS_ERR("I/O memory allocation failure: 0x%x",
+ map->data.size);
+ goto exit_err;
+ }
+ map->data.phys_base = map->alloc_data_base;
+ map->data.base = spsi_get_mem_ptr(map->data.phys_base);
+ if (map->data.base == NULL) {
+ SPS_ERR("Cannot get virt addr for I/O buffer: 0x%x",
+ map->data.phys_base);
+ goto exit_err;
+ }
+ }
+
+ /* Attempt to assign this connection to the client */
+ if (sps_rm_assign(pipe, map))
+ goto exit_err;
+
+ /* Initialization was successful */
+ success = true;
+exit_err:
+
+ /* If initialization failed, free resources */
+ if (!success) {
+ sps_rm_free_map_rsrc(map);
+ kfree(map);
+ return NULL;
+ }
+
+ return map;
+}
+
+/**
+ * Free connection mapping
+ *
+ * This function frees a connection mapping.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_rm_free(struct sps_pipe *pipe)
+{
+ struct sps_connection *map = (void *)pipe->map;
+ struct sps_connect *cfg = &pipe->connect;
+
+ mutex_lock(&sps_rm->lock);
+
+ /* Free this connection */
+ if (cfg->mode == SPS_MODE_SRC)
+ map->client_src = NULL;
+ else
+ map->client_dest = NULL;
+
+ pipe->map = NULL;
+ pipe->client_state = SPS_STATE_DISCONNECT;
+ sps_rm_free_map_rsrc(map);
+
+ sps_rm_remove_ref(map);
+
+ mutex_unlock(&sps_rm->lock);
+
+ return 0;
+}
+
+/**
+ * Allocate an SPS connection end point
+ *
+ * This function allocates resources and initializes a BAM connection.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_rm_alloc(struct sps_pipe *pipe)
+{
+ struct sps_connection *map;
+ int result = SPS_ERROR;
+
+ if (pipe->connect.sps_reserved != SPSRM_CLEAR) {
+ /*
+ * Client did not call sps_get_config() to init
+ * struct sps_connect, so only use legacy members.
+ */
+ u32 source = pipe->connect.source;
+ u32 destination = pipe->connect.destination;
+ enum sps_mode mode = pipe->connect.mode;
+ u32 config = pipe->connect.config;
+ memset(&pipe->connect, SPSRM_CLEAR,
+ sizeof(pipe->connect));
+ pipe->connect.source = source;
+ pipe->connect.destination = destination;
+ pipe->connect.mode = mode;
+ pipe->connect.config = config;
+ }
+ if (pipe->connect.config == SPSRM_CLEAR)
+ pipe->connect.config = SPS_CONFIG_DEFAULT;
+
+ /*
+ * If configuration is not default, then client is specifying a
+ * connection mapping. Find a matching mapping, or fail.
+ * If a match is found, the client's Connect struct will be updated
+ * with all the mapping's values.
+ */
+ if (pipe->connect.config != SPS_CONFIG_DEFAULT) {
+ if (sps_map_find(&pipe->connect)) {
+ SPS_ERR("Failed to find connection mapping");
+ return SPS_ERROR;
+ }
+ }
+
+ mutex_lock(&sps_rm->lock);
+ /* Check client state */
+ if (IS_SPS_STATE_OK(pipe)) {
+ SPS_ERR("Client connection already allocated");
+ goto exit_err;
+ }
+
+ /* Are the connection resources already allocated? */
+ map = find_unconnected(pipe);
+ if (map != NULL) {
+ /* Attempt to assign this connection to the client */
+ if (sps_rm_assign(pipe, map))
+ /* Assignment failed, so must allocate new */
+ map = NULL;
+ }
+
+ /* Allocate a new connection if necessary */
+ if (map == NULL) {
+ map = sps_rm_create(pipe);
+ if (map == NULL) {
+ SPS_ERR("Failed to allocate connection");
+ goto exit_err;
+ }
+ list_add_tail(&map->list, &sps_rm->connections_q);
+ }
+
+ /* Add the connection to the allocated queue */
+ map->refs++;
+
+ /* Initialization was successful */
+ result = 0;
+exit_err:
+ mutex_unlock(&sps_rm->lock);
+
+ if (result)
+ return SPS_ERROR;
+
+ return 0;
+}
+
+/**
+ * Disconnect an SPS connection end point
+ *
+ * This function frees resources and de-initializes a BAM connection.
+ *
+ * @pipe - client context for SPS connection end point
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+static int sps_rm_disconnect(struct sps_pipe *pipe)
+{
+ sps_rm_free(pipe);
+ return 0;
+}
+
+/**
+ * Process connection state change
+ *
+ * This function processes a connection state change.
+ *
+ * @pipe - pointer to client context
+ *
+ * @state - new state for connection
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_rm_state_change(struct sps_pipe *pipe, u32 state)
+{
+ int auto_enable = false;
+ int result;
+
+ /* Allocate the pipe */
+ if (pipe->client_state == SPS_STATE_DISCONNECT &&
+ state == SPS_STATE_ALLOCATE) {
+ if (sps_rm_alloc(pipe))
+ return SPS_ERROR;
+ }
+
+ /* Configure the pipe */
+ if (pipe->client_state == SPS_STATE_ALLOCATE &&
+ state == SPS_STATE_CONNECT) {
+ /* Connect the BAM pipe */
+ struct sps_bam_connect_param params;
+ memset(¶ms, 0, sizeof(params));
+ params.mode = pipe->connect.mode;
+ if (pipe->connect.options != SPSRM_CLEAR) {
+ params.options = pipe->connect.options;
+ params.irq_gen_addr = pipe->connect.irq_gen_addr;
+ params.irq_gen_data = pipe->connect.irq_gen_data;
+ }
+ result = sps_bam_pipe_connect(pipe, ¶ms);
+ if (result) {
+ SPS_ERR("Failed to connect BAM 0x%x pipe %d",
+ (u32) pipe->bam, pipe->pipe_index);
+ return SPS_ERROR;
+ }
+ pipe->client_state = SPS_STATE_CONNECT;
+
+ /* Set auto-enable for system-mode connections */
+ if (pipe->connect.source == SPS_DEV_HANDLE_MEM ||
+ pipe->connect.destination == SPS_DEV_HANDLE_MEM) {
+ if (pipe->map->desc.size != 0 &&
+ pipe->map->desc.phys_base != SPS_ADDR_INVALID)
+ auto_enable = true;
+ }
+ }
+
+ /* Enable the pipe data flow */
+ if (pipe->client_state == SPS_STATE_CONNECT &&
+ !(state == SPS_STATE_DISABLE
+ || state == SPS_STATE_DISCONNECT)
+ && (state == SPS_STATE_ENABLE || auto_enable
+ || (pipe->connect.options & SPS_O_AUTO_ENABLE))) {
+ result = sps_bam_pipe_enable(pipe->bam, pipe->pipe_index);
+ if (result) {
+ SPS_ERR("Failed to set BAM 0x%x pipe %d flow on",
+ pipe->bam->props.phys_addr,
+ pipe->pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Is this a BAM-DMA pipe? */
+#ifdef CONFIG_SPS_SUPPORT_BAMDMA
+ if ((pipe->bam->props.options & SPS_BAM_OPT_BAMDMA)) {
+ /* Activate the BAM-DMA channel */
+ result = sps_dma_pipe_enable(pipe->bam,
+ pipe->pipe_index);
+ if (result) {
+ SPS_ERR("Failed to activate BAM-DMA pipe: %d",
+ pipe->pipe_index);
+ return SPS_ERROR;
+ }
+ }
+#endif
+ pipe->client_state = SPS_STATE_ENABLE;
+ }
+
+ /* Disable the pipe data flow */
+ if (pipe->client_state == SPS_STATE_ENABLE &&
+ (state == SPS_STATE_DISABLE || state == SPS_STATE_DISCONNECT)) {
+ result = sps_bam_pipe_disable(pipe->bam, pipe->pipe_index);
+ if (result) {
+ SPS_ERR("Failed to set BAM 0x%x pipe %d flow off",
+ pipe->bam->props.phys_addr,
+ pipe->pipe_index);
+ return SPS_ERROR;
+ }
+ pipe->client_state = SPS_STATE_CONNECT;
+ }
+
+ /* Disconnect the BAM pipe */
+ if (pipe->client_state == SPS_STATE_CONNECT &&
+ state == SPS_STATE_DISCONNECT) {
+ struct sps_connection *map;
+ u32 pipe_index;
+
+ if (pipe->connect.mode == SPS_MODE_SRC)
+ pipe_index = pipe->map->src.pipe_index;
+ else
+ pipe_index = pipe->map->dest.pipe_index;
+
+
+ result = sps_bam_pipe_disconnect(pipe->bam, pipe_index);
+ if (result) {
+ SPS_ERR("Failed to disconnect BAM 0x%x pipe %d",
+ pipe->bam->props.phys_addr,
+ pipe->pipe_index);
+ return SPS_ERROR;
+ }
+
+ /* Clear map state */
+ map = (void *)pipe->map;
+ if (pipe->connect.mode == SPS_MODE_SRC)
+ map->client_src = NULL;
+ else if (pipe->connect.mode == SPS_MODE_DEST)
+ map->client_dest = NULL;
+
+ sps_rm_disconnect(pipe);
+
+ /* Clear the client state */
+ pipe->map = NULL;
+ pipe->bam = NULL;
+ pipe->client_state = SPS_STATE_DISCONNECT;
+ }
+
+ return 0;
+}
diff --git a/arch/arm/mach-msm/sps/spsi.h b/arch/arm/mach-msm/sps/spsi.h
new file mode 100644
index 0000000..a81cd9a
--- /dev/null
+++ b/arch/arm/mach-msm/sps/spsi.h
@@ -0,0 +1,284 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Smart-Peripheral-Switch (SPS) internal API.
+ */
+
+#ifndef _SPSI_H_
+#define _SPSI_H_
+
+#include <linux/types.h> /* u32 */
+#include <linux/list.h> /* list_head */
+#include <linux/kernel.h> /* pr_info() */
+
+#include <mach/sps.h>
+
+#include "sps_map.h"
+
+/* Adjust for offset of struct sps_q_event */
+#define SPS_EVENT_INDEX(e) ((e) - 1)
+
+#define SPS_DBG(x...) pr_debug(x)
+#define SPS_INFO(x...) pr_info(x)
+#define SPS_ERR(x...) pr_err(x)
+
+#define SPS_ERROR -1
+
+/* End point parameters */
+struct sps_conn_end_pt {
+ u32 dev; /* Device handle of BAM */
+ u32 bam_phys; /* Physical address of BAM. */
+ u32 pipe_index; /* Pipe index */
+ u32 event_threshold; /* Pipe event threshold */
+ void *bam;
+};
+
+/* Connection bookkeeping descriptor struct */
+struct sps_connection {
+ struct list_head list;
+
+ /* Source end point parameters */
+ struct sps_conn_end_pt src;
+
+ /* Destination end point parameters */
+ struct sps_conn_end_pt dest;
+
+ /* Resource parameters */
+ struct sps_mem_buffer desc; /* Descriptor FIFO */
+ struct sps_mem_buffer data; /* Data FIFO (BAM-to-BAM mode only) */
+ u32 config; /* Client specified connection configuration */
+
+ /* Connection state */
+ void *client_src;
+ void *client_dest;
+ int refs; /* Reference counter */
+
+ /* Dynamically allocated resouces, if required */
+ u32 alloc_src_pipe; /* Source pipe index */
+ u32 alloc_dest_pipe; /* Destination pipe index */
+ u32 alloc_desc_base; /* Physical address of descriptor FIFO */
+ u32 alloc_data_base; /* Physical address of data FIFO */
+};
+
+/* Event bookkeeping descriptor struct */
+struct sps_q_event {
+ struct list_head list;
+ /* Event payload data */
+ struct sps_event_notify notify;
+};
+
+/* Memory heap statistics */
+struct sps_mem_stats {
+ u32 base_addr;
+ u32 size;
+ u32 blocks_used;
+ u32 bytes_used;
+ u32 max_bytes_used;
+};
+
+/**
+ * Translate physical to virtual address
+ *
+ * This Function translates physical to virtual address.
+ *
+ * @phys_addr - physical address to translate
+ *
+ * @return virtual memory pointer
+ *
+ */
+void *spsi_get_mem_ptr(u32 phys_addr);
+
+/**
+ * Allocate I/O (pipe) memory
+ *
+ * This function allocates target I/O (pipe) memory.
+ *
+ * @bytes - number of bytes to allocate
+ *
+ * @return physical address of allocated memory, or SPS_ADDR_INVALID on error
+ */
+u32 sps_mem_alloc_io(u32 bytes);
+
+/**
+ * Free I/O (pipe) memory
+ *
+ * This function frees target I/O (pipe) memory.
+ *
+ * @phys_addr - physical address of memory to free
+ *
+ * @bytes - number of bytes to free.
+ */
+void sps_mem_free_io(u32 phys_addr, u32 bytes);
+
+/**
+ * Find matching connection mapping
+ *
+ * This function searches for a connection mapping that matches the
+ * parameters supplied by the client. If a match is found, the client's
+ * parameter struct is updated with the values specified in the mapping.
+ *
+ * @connect - pointer to client connection parameters
+ *
+ * @return 0 if match is found, negative value otherwise
+ *
+ */
+int sps_map_find(struct sps_connect *connect);
+
+/**
+ * Allocate a BAM DMA pipe
+ *
+ * This function allocates a BAM DMA pipe, and is intended to be called
+ * internally from the BAM resource manager. Allocation implies that
+ * the pipe has been referenced by a client Connect() and is in use.
+ *
+ * BAM DMA is permissive with activations, and allows a pipe to be allocated
+ * with or without a client-initiated allocation. This allows the client to
+ * specify exactly which pipe should be used directly through the Connect() API.
+ * sps_dma_alloc_chan() does not allow the client to specify the pipes/channel.
+ *
+ * @bam - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @dir - pipe direction
+ *
+ * @return 0 on success, negative value on error
+ */
+int sps_dma_pipe_alloc(void *bam, u32 pipe_index, enum sps_mode dir);
+
+/**
+ * Enable a BAM DMA pipe
+ *
+ * This function enables the channel associated with a BAM DMA pipe, and
+ * is intended to be called internally from the BAM resource manager.
+ * Enable must occur *after* the pipe has been enabled so that proper
+ * sequencing between pipe and DMA channel enables can be enforced.
+ *
+ * @bam - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_dma_pipe_enable(void *bam, u32 pipe_index);
+
+/**
+ * Free a BAM DMA pipe
+ *
+ * This function disables and frees a BAM DMA pipe, and is intended to be
+ * called internally from the BAM resource manager. This must occur *after*
+ * the pipe has been disabled/reset so that proper sequencing between pipe and
+ * DMA channel resets can be enforced.
+ *
+ * @bam_arg - pointer to BAM device descriptor
+ *
+ * @pipe_index - pipe index
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_dma_pipe_free(void *bam, u32 pipe_index);
+
+/**
+ * Initialize driver memory module
+ *
+ * This function initializes the driver memory module.
+ *
+ * @pipemem_phys_base - Pipe-Memory physical base.
+ *
+ * @pipemem_size - Pipe-Memory size.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_mem_init(u32 pipemem_phys_base, u32 pipemem_size);
+
+/**
+ * De-initialize driver memory module
+ *
+ * This function de-initializes the driver memory module.
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_mem_de_init(void);
+
+/**
+ * Initialize BAM DMA module
+ *
+ * This function initializes the BAM DMA module.
+ *
+ * @bam_props - pointer to BAM DMA devices BSP configuration properties
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_dma_init(const struct sps_bam_props *bam_props);
+
+/**
+ * De-initialize BAM DMA module
+ *
+ * This function de-initializes the SPS BAM DMA module.
+ *
+ */
+void sps_dma_de_init(void);
+
+/**
+ * Initialize BAM DMA device
+ *
+ * This function initializes a BAM DMA device.
+ *
+ * @h - BAM handle
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_dma_device_init(u32 h);
+
+/**
+ * De-initialize BAM DMA device
+ *
+ * This function de-initializes a BAM DMA device.
+ *
+ * @h - BAM handle
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+int sps_dma_device_de_init(u32 h);
+
+/**
+ * Initialize connection mapping module
+ *
+ * This function initializes the SPS connection mapping module.
+ *
+ * @map_props - pointer to connection mapping BSP configuration properties
+ *
+ * @options - driver options bitflags (see SPS_OPT_*)
+ *
+ * @return 0 on success, negative value on error
+ *
+ */
+
+int sps_map_init(const struct sps_map *map_props, u32 options);
+
+/**
+ * De-initialize connection mapping module
+ *
+ * This function de-initializes the SPS connection mapping module.
+ *
+ */
+void sps_map_de_init(void);
+
+#endif /* _SPSI_H_ */
--
1.7.3.3
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum
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