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Message-ID: <1292585042-28408-1-git-send-email-par-gunnar.p.hjalmdahl@stericsson.com>
Date: Fri, 17 Dec 2010 12:24:02 +0100
From: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
To: Pavan Savoy <pavan_savoy@...y.com>,
Vitaly Wool <vitalywool@...il.com>,
Alan Cox <alan@...rguk.ukuu.org.uk>,
Arnd Bergmann <arnd@...db.de>,
Samuel Ortiz <sameo@...ux.intel.com>,
Marcel Holtmann <marcel@...tmann.org>
Cc: <linux-kernel@...r.kernel.org>, <linux-bluetooth@...r.kernel.org>,
Lukasz Rymanowski <Lukasz.Rymanowski@...to.com>,
Linus Walleij <linus.walleij@...ricsson.com>,
Par-Gunnar Hjalmdahl <pghatwork@...il.com>,
Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
Subject: [PATCH 03/11] mfd: Add support for CG2900 controller
This patch adds support for the ST-Ericsson CG2900
framework. The CG2900 is a chip supporting GPS, Bluetooth,
and FM radio. The channels are separated by using the first
byte to identify the channel.
This patch adds support for allocating H:4 channels for both
Kernel and User space (using char devs) using MFD framework.
Signed-off-by: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
---
drivers/mfd/Kconfig | 16 +-
drivers/mfd/cg2900/Makefile | 6 +-
drivers/mfd/cg2900/cg2900_chip.c | 3250 ++++++++++++++++++++++++++++++++++++++
drivers/mfd/cg2900/cg2900_chip.h | 602 +++++++
drivers/mfd/cg2900/cg2900_lib.c | 391 +++++
drivers/mfd/cg2900/cg2900_lib.h | 61 +
include/net/bluetooth/hci.h | 5 +
7 files changed, 4327 insertions(+), 4 deletions(-)
create mode 100644 drivers/mfd/cg2900/cg2900_chip.c
create mode 100644 drivers/mfd/cg2900/cg2900_chip.h
create mode 100644 drivers/mfd/cg2900/cg2900_lib.c
create mode 100644 drivers/mfd/cg2900/cg2900_lib.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 7c833f9..1328b5d 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -266,8 +266,20 @@ config MFD_CG2900
tristate "Support ST-Ericsson CG2900 main structure"
depends on NET
help
- Support for ST-Ericsson CG2900 Connectivity Combo controller main structure.
- Supports multiple functionalities muxed over a Bluetooth HCI H:4 interface.
+ Support for ST-Ericsson CG2900 Connectivity Combo controller main
+ structure.
+ Allows chip drivers and transport drivers to register to the
+ framework and implements functionality to map the correct
+ chip driver to the connected chip using Bluetooth Read Local
+ Version HCI command.
+
+config MFD_CG2900_CHIP
+ tristate "Support CG2900 Connectivity controller"
+ depends on MFD_CG2900
+ help
+ Support for ST-Ericsson CG2900 Connectivity Controller.
+ Supports multiple functionalities multiplexed over a Bluetooth HCI
+ H:4 interface where first byte determines channel used.
CG2900 support Bluetooth, FM radio, and GPS.
config PMIC_DA903X
diff --git a/drivers/mfd/cg2900/Makefile b/drivers/mfd/cg2900/Makefile
index 0ac9bc6..9a5e228 100644
--- a/drivers/mfd/cg2900/Makefile
+++ b/drivers/mfd/cg2900/Makefile
@@ -2,8 +2,10 @@
# Makefile for ST-Ericsson CG2900 connectivity combo controller
#
-obj-$(CONFIG_MFD_CG2900) += cg2900_core.o
-export-objs := cg2900_core.o
+obj-$(CONFIG_MFD_CG2900) += cg2900_core.o cg2900_lib.o
+export-objs := cg2900_core.o cg2900_lib.o
obj-$(CONFIG_MFD_CG2900) += cg2900_char_devices.o
+obj-$(CONFIG_MFD_CG2900_CHIP) += cg2900_chip.o
+
diff --git a/drivers/mfd/cg2900/cg2900_chip.c b/drivers/mfd/cg2900/cg2900_chip.c
new file mode 100644
index 0000000..d7589e4
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_chip.c
@@ -0,0 +1,3250 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson CG2900 GPS/BT/FM controller.
+ */
+#define NAME "cg2900_chip"
+#define pr_fmt(fmt) NAME ": " fmt "\n"
+
+#include <asm/byteorder.h>
+#include <linux/device.h>
+#include <linux/firmware.h>
+#include <linux/gfp.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/skbuff.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <linux/timer.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+#include <linux/mfd/cg2900.h>
+#include <linux/mfd/core.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci.h>
+
+#include "cg2900_chip.h"
+#include "cg2900_core.h"
+#include "cg2900_lib.h"
+
+#define MAIN_DEV (main_info->dev)
+#define BOOT_DEV (info->user_in_charge->dev)
+
+#define WQ_NAME "cg2900_chip_wq"
+#define PATCH_INFO_FILE "cg2900_patch_info.fw"
+#define FACTORY_SETTINGS_INFO_FILE "cg2900_settings_info.fw"
+
+#define LINE_TOGGLE_DETECT_TIMEOUT 50 /* ms */
+#define CHIP_READY_TIMEOUT 100 /* ms */
+#define CHIP_STARTUP_TIMEOUT 15000 /* ms */
+#define CHIP_SHUTDOWN_TIMEOUT 15000 /* ms */
+#define POWER_SW_OFF_WAIT 500 /* ms */
+
+/** CHANNEL_BT_CMD - Bluetooth HCI H:4 channel
+ * for Bluetooth commands in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_BT_CMD 0x01
+
+/** CHANNEL_BT_ACL - Bluetooth HCI H:4 channel
+ * for Bluetooth ACL data in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_BT_ACL 0x02
+
+/** CHANNEL_BT_EVT - Bluetooth HCI H:4 channel
+ * for Bluetooth events in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_BT_EVT 0x04
+
+/** CHANNEL_FM_RADIO - Bluetooth HCI H:4 channel
+ * for FM radio in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_FM_RADIO 0x08
+
+/** CHANNEL_GNSS - Bluetooth HCI H:4 channel
+ * for GNSS in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_GNSS 0x09
+
+/** CHANNEL_DEBUG - Bluetooth HCI H:4 channel
+ * for internal debug data in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_DEBUG 0x0B
+
+/** CHANNEL_STE_TOOLS - Bluetooth HCI H:4 channel
+ * for development tools data in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_STE_TOOLS 0x0D
+
+/** CHANNEL_HCI_LOGGER - Bluetooth HCI H:4 channel
+ * for logging all transmitted H4 packets (on all channels).
+ */
+#define CHANNEL_HCI_LOGGER 0xFA
+
+/** CHANNEL_CORE - Bluetooth HCI H:4 channel
+ * for user space control of the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_CORE 0xFD
+
+/** CG2900_BT_CMD - Bluetooth HCI H4 channel for Bluetooth commands.
+ */
+#define CG2900_BT_CMD "cg2900_bt_cmd"
+
+/** CG2900_BT_ACL - Bluetooth HCI H4 channel for Bluetooth ACL data.
+ */
+#define CG2900_BT_ACL "cg2900_bt_acl"
+
+/** CG2900_BT_EVT - Bluetooth HCI H4 channel for Bluetooth events.
+ */
+#define CG2900_BT_EVT "cg2900_bt_evt"
+
+/** CG2900_FM_RADIO - Bluetooth HCI H4 channel for FM radio.
+ */
+#define CG2900_FM_RADIO "cg2900_fm_radio"
+
+/** CG2900_GNSS - Bluetooth HCI H4 channel for GNSS.
+ */
+#define CG2900_GNSS "cg2900_gnss"
+
+/** CG2900_DEBUG - Bluetooth HCI H4 channel for internal debug data.
+ */
+#define CG2900_DEBUG "cg2900_debug"
+
+/** CG2900_STE_TOOLS - Bluetooth HCI H4 channel for development tools data.
+ */
+#define CG2900_STE_TOOLS "cg2900_ste_tools"
+
+/** CG2900_HCI_LOGGER - BT channel for logging all transmitted H4 packets.
+ * Data read is copy of all data transferred on the other channels.
+ * Only write allowed is configuration of the HCI Logger.
+ */
+#define CG2900_HCI_LOGGER "cg2900_hci_logger"
+
+/** CG2900_BT_AUDIO - HCI Channel for BT audio configuration commands.
+ * Maps to Bluetooth command and event channels.
+ */
+#define CG2900_BT_AUDIO "cg2900_bt_audio"
+
+/** CG2900_FM_AUDIO - HCI channel for FM audio configuration commands.
+ * Maps to FM Radio channel.
+ */
+#define CG2900_FM_AUDIO "cg2900_fm_audio"
+
+/** CG2900_CORE- Channel for keeping ST-Ericsson CG2900 enabled.
+ * Opening this channel forces the chip to stay powered.
+ * No data can be written to or read from this channel.
+ */
+#define CG2900_CORE "cg2900_core"
+
+/**
+ * enum main_state - Main-state for CG2900 driver.
+ * @CG2900_INIT: CG2900 initializing.
+ * @CG2900_IDLE: No user registered to CG2900 driver.
+ * @CG2900_BOOTING: CG2900 booting after first user is registered.
+ * @CG2900_CLOSING: CG2900 closing after last user has deregistered.
+ * @CG2900_RESETING: CG2900 reset requested.
+ * @CG2900_ACTIVE: CG2900 up and running with at least one user.
+ */
+enum main_state {
+ CG2900_INIT,
+ CG2900_IDLE,
+ CG2900_BOOTING,
+ CG2900_CLOSING,
+ CG2900_RESETING,
+ CG2900_ACTIVE
+};
+
+/**
+ * enum boot_state - BOOT-state for CG2900 chip driver.
+ * @BOOT_NOT_STARTED: Boot has not yet started.
+ * @BOOT_SEND_BD_ADDRESS: VS Store In FS command with BD address
+ * has been sent.
+ * @BOOT_GET_FILES_TO_LOAD: CG2900 chip driver is retrieving file to
+ * load.
+ * @BOOT_DOWNLOAD_PATCH: CG2900 chip driver is downloading
+ * patches.
+ * @BOOT_ACTIVATE_PATCHES_AND_SETTINGS: CG2900 chip driver is activating patches
+ * and settings.
+ * @BOOT_DISABLE_BT: Disable BT Core.
+ * @BOOT_READY: CG2900 chip driver boot is ready.
+ * @BOOT_FAILED: CG2900 chip driver boot failed.
+ */
+enum boot_state {
+ BOOT_NOT_STARTED,
+ BOOT_SEND_BD_ADDRESS,
+ BOOT_GET_FILES_TO_LOAD,
+ BOOT_DOWNLOAD_PATCH,
+ BOOT_ACTIVATE_PATCHES_AND_SETTINGS,
+ BOOT_DISABLE_BT,
+ BOOT_READY,
+ BOOT_FAILED
+};
+
+/**
+ * enum closing_state - CLOSING-state for CG2900 chip driver.
+ * @CLOSING_RESET: HCI RESET_CMD has been sent.
+ * @CLOSING_POWER_SWITCH_OFF: HCI VS_POWER_SWITCH_OFF command has been sent.
+ * @CLOSING_SHUT_DOWN: We have now shut down the chip.
+ */
+enum closing_state {
+ CLOSING_RESET,
+ CLOSING_POWER_SWITCH_OFF,
+ CLOSING_SHUT_DOWN
+};
+
+/**
+ * enum file_load_state - BOOT_FILE_LOAD-state for CG2900 chip driver.
+ * @FILE_LOAD_GET_PATCH: Loading patches.
+ * @FILE_LOAD_GET_STATIC_SETTINGS: Loading static settings.
+ * @FILE_LOAD_NO_MORE_FILES: No more files to load.
+ * @FILE_LOAD_FAILED: File loading failed.
+ */
+enum file_load_state {
+ FILE_LOAD_GET_PATCH,
+ FILE_LOAD_GET_STATIC_SETTINGS,
+ FILE_LOAD_NO_MORE_FILES,
+ FILE_LOAD_FAILED
+};
+
+/**
+ * enum download_state - BOOT_DOWNLOAD state.
+ * @DOWNLOAD_PENDING: Download in progress.
+ * @DOWNLOAD_SUCCESS: Download successfully finished.
+ * @DOWNLOAD_FAILED: Downloading failed.
+ */
+enum download_state {
+ DOWNLOAD_PENDING,
+ DOWNLOAD_SUCCESS,
+ DOWNLOAD_FAILED
+};
+
+/**
+ * enum fm_radio_mode - FM Radio mode.
+ * It's needed because some FM do-commands generate interrupts only when
+ * the FM driver is in specific mode and we need to know if we should expect
+ * the interrupt.
+ * @FM_RADIO_MODE_IDLE: Radio mode is Idle (default).
+ * @FM_RADIO_MODE_FMT: Radio mode is set to FMT (transmitter).
+ * @FM_RADIO_MODE_FMR: Radio mode is set to FMR (receiver).
+ */
+enum fm_radio_mode {
+ FM_RADIO_MODE_IDLE = 0,
+ FM_RADIO_MODE_FMT = 1,
+ FM_RADIO_MODE_FMR = 2
+};
+
+
+/**
+ * struct cg2900_channel_item - List object for channel.
+ * @list: list_head struct.
+ * @user: User for this channel.
+ */
+struct cg2900_channel_item {
+ struct list_head list;
+ struct cg2900_user_data *user;
+};
+
+/**
+ * struct cg2900_skb_data - Structure for storing private data in an sk_buffer.
+ * @dev: CG2900 device for this sk_buffer.
+ */
+struct cg2900_skb_data {
+ struct cg2900_user_data *user;
+};
+#define cg2900_skb_data(__skb) ((struct cg2900_skb_data *)((__skb)->cb))
+
+/**
+ * struct cg2900_chip_info - Main info structure for CG2900 chip driver.
+ * @dev: Current device. Same as @chip_dev->dev.
+ * @patch_file_name: Stores patch file name.
+ * @settings_file_name: Stores settings file name.
+ * @file_info: Firmware file info (patch or settings).
+ * @boot_state: Current BOOT-state of CG2900 chip driver.
+ * @closing_state: Current CLOSING-state of CG2900 chip driver.
+ * @file_load_state: Current BOOT_FILE_LOAD-state of CG2900 chip
+ * driver.
+ * @download_state: Current BOOT_DOWNLOAD-state of CG2900 chip
+ * driver.
+ * @wq: CG2900 chip driver workqueue.
+ * @chip_dev: Chip handler info.
+ * @tx_bt_lock: Spinlock used to protect some global structures
+ * related to internal BT command flow control.
+ * @tx_fm_lock: Spinlock used to protect some global structures
+ * related to internal FM command flow control.
+ * @tx_fm_audio_awaiting_irpt: Indicates if an FM interrupt event related to
+ * audio driver command is expected.
+ * @fm_radio_mode: Current FM radio mode.
+ * @tx_nr_pkts_allowed_bt: Number of packets allowed to send on BT HCI CMD
+ * H4 channel.
+ * @audio_bt_cmd_op: Stores the OpCode of the last sent audio driver
+ * HCI BT CMD.
+ * @audio_fm_cmd_id: Stores the command id of the last sent
+ * HCI FM RADIO command by the fm audio user.
+ * @hci_fm_cmd_func: Stores the command function of the last sent
+ * HCI FM RADIO command by the fm radio user.
+ * @tx_queue_bt: TX queue for HCI BT commands when nr of commands
+ * allowed is 0 (CG2900 internal flow control).
+ * @tx_queue_fm: TX queue for HCI FM commands when nr of commands
+ * allowed is 0 (CG2900 internal flow control).
+ * @user_in_charge: User currently operating. Normally used at
+ * channel open and close.
+ * @last_user: Last user of this chip. To avoid complications
+ * this will never be set for bt_audio and
+ * fm_audio.
+ * @logger: Logger user of this chip.
+ */
+struct cg2900_chip_info {
+ struct device *dev;
+ char *patch_file_name;
+ char *settings_file_name;
+ struct cg2900_file_info file_info;
+ enum main_state main_state;
+ enum boot_state boot_state;
+ enum closing_state closing_state;
+ enum file_load_state file_load_state;
+ enum download_state download_state;
+ struct workqueue_struct *wq;
+ struct cg2900_chip_dev *chip_dev;
+ spinlock_t tx_bt_lock;
+ spinlock_t tx_fm_lock;
+ spinlock_t rw_lock;
+ bool tx_fm_audio_awaiting_irpt;
+ enum fm_radio_mode fm_radio_mode;
+ int tx_nr_pkts_allowed_bt;
+ u16 audio_bt_cmd_op;
+ u16 audio_fm_cmd_id;
+ u16 hci_fm_cmd_func;
+ struct sk_buff_head tx_queue_bt;
+ struct sk_buff_head tx_queue_fm;
+ struct list_head open_channels;
+ struct cg2900_user_data *user_in_charge;
+ struct cg2900_user_data *last_user;
+ struct cg2900_user_data *logger;
+ struct cg2900_user_data *bt_audio;
+ struct cg2900_user_data *fm_audio;
+};
+
+/**
+ * struct main_info - Main info structure for CG2900 chip driver.
+ * @dev: Device structure.
+ * @cell_base_id: Base ID for MFD cells.
+ * @man_mutex: Management mutex.
+ */
+struct main_info {
+ struct device *dev;
+ int cell_base_id;
+ struct mutex man_mutex;
+};
+
+static struct main_info *main_info;
+
+/*
+ * main_wait_queue - Main Wait Queue in CG2900 driver.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(main_wait_queue);
+
+static void chip_startup_finished(struct cg2900_chip_info *info, int err);
+
+/**
+ * bt_is_open() - Checks if any BT user is in open state.
+ * @info: CG2900 info.
+ *
+ * Returns:
+ * true if a BT channel is open.
+ * false if no BT channel is open.
+ */
+static bool bt_is_open(struct cg2900_chip_info *info)
+{
+ struct list_head *cursor;
+ struct cg2900_channel_item *tmp;
+
+ list_for_each(cursor, &info->open_channels) {
+ tmp = list_entry(cursor, struct cg2900_channel_item, list);
+ if (tmp->user->h4_channel == CHANNEL_BT_CMD)
+ return true;
+ }
+ return false;
+}
+
+/**
+ * fm_is_open() - Checks if any FM user is in open state.
+ * @info: CG2900 info.
+ *
+ * Returns:
+ * true if a FM channel is open.
+ * false if no FM channel is open.
+ */
+static bool fm_is_open(struct cg2900_chip_info *info)
+{
+ struct list_head *cursor;
+ struct cg2900_channel_item *tmp;
+
+ list_for_each(cursor, &info->open_channels) {
+ tmp = list_entry(cursor, struct cg2900_channel_item, list);
+ if (tmp->user->h4_channel == CHANNEL_FM_RADIO)
+ return true;
+ }
+ return false;
+}
+
+/**
+ * fm_irpt_expected() - check if this FM command will generate an interrupt.
+ * @cmd_id: command identifier.
+ *
+ * Returns:
+ * true if the command will generate an interrupt.
+ * false if it won't.
+ */
+static bool fm_irpt_expected(struct cg2900_chip_info *info, u16 cmd_id)
+{
+ bool retval = false;
+
+ switch (cmd_id) {
+ case CG2900_FM_DO_AIP_FADE_START:
+ if (info->fm_radio_mode == FM_RADIO_MODE_FMT)
+ retval = true;
+ break;
+
+ case CG2900_FM_DO_AUP_BT_FADE_START:
+ case CG2900_FM_DO_AUP_EXT_FADE_START:
+ case CG2900_FM_DO_AUP_FADE_START:
+ if (info->fm_radio_mode == FM_RADIO_MODE_FMR)
+ retval = true;
+ break;
+
+ case CG2900_FM_DO_FMR_SETANTENNA:
+ case CG2900_FM_DO_FMR_SP_AFSWITCH_START:
+ case CG2900_FM_DO_FMR_SP_AFUPDATE_START:
+ case CG2900_FM_DO_FMR_SP_BLOCKSCAN_START:
+ case CG2900_FM_DO_FMR_SP_PRESETPI_START:
+ case CG2900_FM_DO_FMR_SP_SCAN_START:
+ case CG2900_FM_DO_FMR_SP_SEARCH_START:
+ case CG2900_FM_DO_FMR_SP_SEARCHPI_START:
+ case CG2900_FM_DO_FMR_SP_TUNE_SETCHANNEL:
+ case CG2900_FM_DO_FMR_SP_TUNE_STEPCHANNEL:
+ case CG2900_FM_DO_FMT_PA_SETCTRL:
+ case CG2900_FM_DO_FMT_PA_SETMODE:
+ case CG2900_FM_DO_FMT_SP_TUNE_SETCHANNEL:
+ case CG2900_FM_DO_GEN_ANTENNACHECK_START:
+ case CG2900_FM_DO_GEN_GOTOMODE:
+ case CG2900_FM_DO_GEN_POWERSUPPLY_SETMODE:
+ case CG2900_FM_DO_GEN_SELECTREFERENCECLOCK:
+ case CG2900_FM_DO_GEN_SETPROCESSINGCLOCK:
+ case CG2900_FM_DO_GEN_SETREFERENCECLOCKPLL:
+ case CG2900_FM_DO_TST_TX_RAMP_START:
+ retval = true;
+ break;
+
+ default:
+ break;
+ }
+
+ if (retval)
+ dev_dbg(info->dev, "Following interrupt event expected for this"
+ " Cmd complete evt: cmd_id = 0x%X\n",
+ cmd_id);
+
+ return retval;
+}
+
+/**
+ * fm_is_do_cmd_irpt() - Check if irpt_val is one of the FM DO command related interrupts.
+ * @irpt_val: interrupt value.
+ *
+ * Returns:
+ * true if it's do-command related interrupt value.
+ * false if it's not.
+ */
+static bool fm_is_do_cmd_irpt(u16 irpt_val)
+{
+ if ((irpt_val & CG2900_FM_IRPT_OPERATION_SUCCEEDED) ||
+ (irpt_val & CG2900_FM_IRPT_OPERATION_FAILED)) {
+ dev_dbg(MAIN_DEV, "Irpt evt for FM do-command found, "
+ "irpt_val = 0x%X\n", irpt_val);
+ return true;
+ }
+
+ return false;
+}
+
+/**
+ * fm_reset_flow_ctrl - Clears up internal FM flow control.
+ *
+ * Resets outstanding commands and clear FM TX list and set CG2900 FM mode to
+ * idle.
+ */
+static void fm_reset_flow_ctrl(struct cg2900_chip_info *info)
+{
+ dev_dbg(info->dev, "fm_reset_flow_ctrl\n");
+
+ skb_queue_purge(&info->tx_queue_fm);
+
+ /* Reset the fm_cmd_id. */
+ info->audio_fm_cmd_id = CG2900_FM_CMD_NONE;
+ info->hci_fm_cmd_func = CG2900_FM_CMD_PARAM_NONE;
+
+ info->fm_radio_mode = FM_RADIO_MODE_IDLE;
+}
+
+
+/**
+ * fm_parse_cmd - Parses a FM command packet.
+ * @data: FM command packet.
+ * @cmd_func: Out: FM legacy command function.
+ * @cmd_id: Out: FM legacy command ID.
+ */
+static void fm_parse_cmd(u8 *data, u8 *cmd_func, u16 *cmd_id)
+{
+ /* Move past H4-header to start of actual package */
+ struct fm_leg_cmd *pkt = (struct fm_leg_cmd *)(data + HCI_H4_SIZE);
+
+ *cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ *cmd_id = CG2900_FM_CMD_NONE;
+
+ if (pkt->opcode != CG2900_FM_GEN_ID_LEGACY) {
+ dev_err(MAIN_DEV, "fm_parse_cmd: Not an FM legacy command "
+ "0x%02X\n", pkt->opcode);
+ return;
+ }
+
+ *cmd_func = pkt->fm_function;
+ if (*cmd_func == CG2900_FM_CMD_PARAM_WRITECOMMAND)
+ *cmd_id = cg2900_get_fm_cmd_id(le16_to_cpu(pkt->fm_cmd.head));
+}
+
+
+/**
+ * fm_parse_event - Parses a FM event packet
+ * @data: FM event packet.
+ * @event: Out: FM event.
+ * @cmd_func: Out: FM legacy command function.
+ * @cmd_id: Out: FM legacy command ID.
+ * @intr_val: Out: FM interrupt value.
+ */
+static void fm_parse_event(u8 *data, u8 *event, u8 *cmd_func, u16 *cmd_id,
+ u16 *intr_val)
+{
+ /* Move past H4-header to start of actual package */
+ union fm_leg_evt_or_irq *pkt = (union fm_leg_evt_or_irq *)data;
+
+ *cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ *cmd_id = CG2900_FM_CMD_NONE;
+ *intr_val = 0;
+ *event = CG2900_FM_EVENT_UNKNOWN;
+
+ if (pkt->evt.opcode == CG2900_FM_GEN_ID_LEGACY &&
+ pkt->evt.read_write == CG2900_FM_CMD_LEG_PARAM_WRITE) {
+ /* Command complete */
+ *event = CG2900_FM_EVENT_CMD_COMPLETE;
+ *cmd_func = pkt->evt.fm_function;
+ if (*cmd_func == CG2900_FM_CMD_PARAM_WRITECOMMAND)
+ *cmd_id = cg2900_get_fm_cmd_id(
+ le16_to_cpu(pkt->evt.response_head));
+ } else if (pkt->irq_v2.opcode == CG2900_FM_GEN_ID_LEGACY &&
+ pkt->irq_v2.event_type == CG2900_FM_CMD_LEG_PARAM_IRQ) {
+ /* Interrupt, PG2 style */
+ *event = CG2900_FM_EVENT_INTERRUPT;
+ *intr_val = le16_to_cpu(pkt->irq_v2.irq);
+ } else if (pkt->irq_v1.opcode == CG2900_FM_GEN_ID_LEGACY) {
+ /* Interrupt, PG1 style */
+ *event = CG2900_FM_EVENT_INTERRUPT;
+ *intr_val = le16_to_cpu(pkt->irq_v1.irq);
+ } else
+ dev_err(MAIN_DEV, "fm_parse_event: Not an FM legacy command "
+ "0x%X %X %X %X\n", data[0], data[1], data[2], data[3]);
+}
+
+/**
+ * fm_update_mode - Updates the FM mode state machine.
+ * @data: FM command packet.
+ *
+ * Parses a FM command packet and updates the FM mode state machine.
+ */
+static void fm_update_mode(struct cg2900_chip_info *info, u8 *data)
+{
+ u8 cmd_func;
+ u16 cmd_id;
+
+ fm_parse_cmd(data, &cmd_func, &cmd_id);
+
+ if (cmd_func == CG2900_FM_CMD_PARAM_WRITECOMMAND &&
+ cmd_id == CG2900_FM_DO_GEN_GOTOMODE) {
+ /* Move past H4-header to start of actual package */
+ struct fm_leg_cmd *pkt =
+ (struct fm_leg_cmd *)(data + HCI_H4_SIZE);
+
+ info->fm_radio_mode = le16_to_cpu(pkt->fm_cmd.data[0]);
+ dev_dbg(info->dev, "FM Radio mode changed to %d\n",
+ info->fm_radio_mode);
+ }
+}
+
+
+/**
+ * transmit_skb_from_tx_queue_bt() - Check flow control info and transmit skb.
+ *
+ * The transmit_skb_from_tx_queue_bt() function checks if there are tickets
+ * available and commands waiting in the TX queue and if so transmits them
+ * to the controller.
+ * It shall always be called within spinlock_bh.
+ */
+static void transmit_skb_from_tx_queue_bt(struct cg2900_chip_dev *dev)
+{
+ struct cg2900_user_data *user;
+ struct cg2900_chip_info *info = dev->c_data;
+ struct sk_buff *skb;
+
+ dev_dbg(dev->dev, "transmit_skb_from_tx_queue_bt\n");
+
+ /* Dequeue an skb from the head of the list */
+ skb = skb_dequeue(&info->tx_queue_bt);
+ while (skb) {
+ if (info->tx_nr_pkts_allowed_bt <= 0) {
+ /*
+ * If no more packets allowed just return, we'll get
+ * back here after next Command Complete/Status event.
+ * Put skb back at head of queue.
+ */
+ skb_queue_head(&info->tx_queue_bt, skb);
+ return;
+ }
+
+ (info->tx_nr_pkts_allowed_bt)--;
+ dev_dbg(dev->dev, "tx_nr_pkts_allowed_bt = %d\n",
+ info->tx_nr_pkts_allowed_bt);
+
+ user = cg2900_skb_data(skb)->user; /* user is never NULL */
+
+ /*
+ * If it's a command from audio application, store the OpCode,
+ * it'll be used later to decide where to dispatch
+ * the Command Complete event.
+ */
+ if (info->bt_audio == user) {
+ struct hci_command_hdr *hdr = (struct hci_command_hdr *)
+ (skb->data + HCI_H4_SIZE);
+
+ info->audio_bt_cmd_op = le16_to_cpu(hdr->opcode);
+ dev_dbg(user->dev,
+ "Sending cmd from audio driver, saving "
+ "OpCode = 0x%04X\n", info->audio_bt_cmd_op);
+ }
+
+ cg2900_tx_to_chip(user, info->logger, skb);
+
+ /* Dequeue an skb from the head of the list */
+ skb = skb_dequeue(&info->tx_queue_bt);
+ }
+}
+
+/**
+ * transmit_skb_from_tx_queue_fm() - Check flow control info and transmit skb.
+ *
+ * The transmit_skb_from_tx_queue_fm() function checks if it possible to
+ * transmit and commands waiting in the TX queue and if so transmits them
+ * to the controller.
+ * It shall always be called within spinlock_bh.
+ */
+static void transmit_skb_from_tx_queue_fm(struct cg2900_chip_dev *dev)
+{
+ struct cg2900_user_data *user;
+ struct cg2900_chip_info *info = dev->c_data;
+ struct sk_buff *skb;
+
+ dev_dbg(dev->dev, "transmit_skb_from_tx_queue_fm\n");
+
+ /* Dequeue an skb from the head of the list */
+ skb = skb_dequeue(&info->tx_queue_fm);
+ while (skb) {
+ u16 cmd_id;
+ u8 cmd_func;
+
+ if (info->audio_fm_cmd_id != CG2900_FM_CMD_NONE ||
+ info->hci_fm_cmd_func != CG2900_FM_CMD_PARAM_NONE) {
+ /*
+ * There are currently outstanding FM commands.
+ * Wait for them to finish. We will get back here later.
+ * Queue back the skb at head of list.
+ */
+ skb_queue_head(&info->tx_queue_bt, skb);
+ return;
+ }
+
+ user = cg2900_skb_data(skb)->user; /* user is never NULL */
+
+ if (!user->opened) {
+ /*
+ * Channel is not open. That means that the user that
+ * originally sent it has deregistered.
+ * Just throw it away and check the next skb in the
+ * queue.
+ */
+ kfree_skb(skb);
+ /* Dequeue an skb from the head of the list */
+ skb = skb_dequeue(&info->tx_queue_fm);
+ continue;
+ }
+
+ fm_parse_cmd(&(skb->data[0]), &cmd_func, &cmd_id);
+
+ /*
+ * Store the FM command function , it'll be used later to decide
+ * where to dispatch the Command Complete event.
+ */
+ if (info->fm_audio == user) {
+ info->audio_fm_cmd_id = cmd_id;
+ dev_dbg(user->dev, "Sending FM audio cmd 0x%04X\n",
+ info->audio_fm_cmd_id);
+ } else {
+ /* FM radio command */
+ info->hci_fm_cmd_func = cmd_func;
+ fm_update_mode(info, &skb->data[0]);
+ dev_dbg(user->dev, "Sending FM radio cmd 0x%04X\n",
+ info->hci_fm_cmd_func);
+ }
+
+ /*
+ * We have only one ticket on FM. Just return after
+ * sending the skb.
+ */
+ cg2900_tx_to_chip(user, info->logger, skb);
+ return;
+ }
+}
+
+/**
+ * update_flow_ctrl_bt() - Update number of outstanding commands for BT CMD.
+ * @dev: Current chip device.
+ * @skb: skb with received packet.
+ *
+ * The update_flow_ctrl_bt() checks if incoming data packet is
+ * BT Command Complete/Command Status Event and if so updates number of tickets
+ * and number of outstanding commands. It also calls function to send queued
+ * commands (if the list of queued commands is not empty).
+ */
+static void update_flow_ctrl_bt(struct cg2900_chip_dev *dev,
+ const struct sk_buff * const skb)
+{
+ u8 *data = skb->data;
+ struct hci_event_hdr *event;
+ struct cg2900_chip_info *info = dev->c_data;
+
+ event = (struct hci_event_hdr *)data;
+ data += sizeof(*event);
+
+ if (HCI_EV_CMD_COMPLETE == event->evt) {
+ struct hci_ev_cmd_complete *complete;
+ complete = (struct hci_ev_cmd_complete *)data;
+
+ /*
+ * If it's HCI Command Complete Event then we might get some
+ * HCI tickets back. Also we can decrease the number outstanding
+ * HCI commands (if it's not NOP command or one of the commands
+ * that generate both Command Status Event and Command Complete
+ * Event).
+ * Check if we have any HCI commands waiting in the TX list and
+ * send them if there are tickets available.
+ */
+ spin_lock_bh(&info->tx_bt_lock);
+ info->tx_nr_pkts_allowed_bt = complete->ncmd;
+ dev_dbg(dev->dev, "New tx_nr_pkts_allowed_bt = %d\n",
+ info->tx_nr_pkts_allowed_bt);
+
+ if (!skb_queue_empty(&info->tx_queue_bt))
+ transmit_skb_from_tx_queue_bt(dev);
+ spin_unlock_bh(&info->tx_bt_lock);
+ } else if (HCI_EV_CMD_STATUS == event->evt) {
+ struct hci_ev_cmd_status *status;
+ status = (struct hci_ev_cmd_status *)data;
+
+ /*
+ * If it's HCI Command Status Event then we might get some
+ * HCI tickets back. Also we can decrease the number outstanding
+ * HCI commands (if it's not NOP command).
+ * Check if we have any HCI commands waiting in the TX queue and
+ * send them if there are tickets available.
+ */
+ spin_lock_bh(&info->tx_bt_lock);
+ info->tx_nr_pkts_allowed_bt = status->ncmd;
+ dev_dbg(dev->dev, "New tx_nr_pkts_allowed_bt = %d\n",
+ info->tx_nr_pkts_allowed_bt);
+
+ if (!skb_queue_empty(&info->tx_queue_bt))
+ transmit_skb_from_tx_queue_bt(dev);
+ spin_unlock_bh(&info->tx_bt_lock);
+ }
+}
+
+/**
+ * update_flow_ctrl_fm() - Update packets allowed for FM channel.
+ * @dev: Current chip device.
+ * @skb: skb with received packet.
+ *
+ * The update_flow_ctrl_fm() checks if incoming data packet is FM packet
+ * indicating that the previous command has been handled and if so update
+ * packets. It also calls function to send queued commands (if the list of
+ * queued commands is not empty).
+ */
+static void update_flow_ctrl_fm(struct cg2900_chip_dev *dev,
+ const struct sk_buff * const skb)
+{
+ u8 cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ u16 cmd_id = CG2900_FM_CMD_NONE;
+ u16 irpt_val = 0;
+ u8 event = CG2900_FM_EVENT_UNKNOWN;
+ struct cg2900_chip_info *info = dev->c_data;
+
+ fm_parse_event(&(skb->data[0]), &event, &cmd_func, &cmd_id, &irpt_val);
+
+ if (event == CG2900_FM_EVENT_CMD_COMPLETE) {
+ /* FM legacy command complete event */
+ spin_lock_bh(&info->tx_fm_lock);
+ /*
+ * Check if it's not an write command complete event, because
+ * then it cannot be a DO command.
+ * If it's a write command complete event check that is not a
+ * DO command complete event before setting the outstanding
+ * FM packets to none.
+ */
+ if (cmd_func != CG2900_FM_CMD_PARAM_WRITECOMMAND ||
+ !fm_irpt_expected(info, cmd_id)) {
+ info->hci_fm_cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ info->audio_fm_cmd_id = CG2900_FM_CMD_NONE;
+ dev_dbg(dev->dev,
+ "FM_Write: Outstanding FM commands:\n"
+ "\tRadio: 0x%04X\n"
+ "\tAudio: 0x%04X\n",
+ info->hci_fm_cmd_func,
+ info->audio_fm_cmd_id);
+ transmit_skb_from_tx_queue_fm(dev);
+
+ /*
+ * If there was a write do command complete event check if it is
+ * DO command previously sent by the FM audio user. If that's
+ * the case we need remember that in order to be able to
+ * dispatch the interrupt to the correct user.
+ */
+ } else if (cmd_id == info->audio_fm_cmd_id) {
+ info->tx_fm_audio_awaiting_irpt = true;
+ dev_dbg(dev->dev,
+ "FM Audio waiting for interrupt = true\n");
+ }
+ spin_unlock_bh(&info->tx_fm_lock);
+ } else if (event == CG2900_FM_EVENT_INTERRUPT) {
+ /* FM legacy interrupt */
+ if (fm_is_do_cmd_irpt(irpt_val)) {
+ /*
+ * If it is an interrupt related to a DO command update
+ * the outstanding flow control and transmit blocked
+ * FM commands.
+ */
+ spin_lock_bh(&info->tx_fm_lock);
+ info->hci_fm_cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ info->audio_fm_cmd_id = CG2900_FM_CMD_NONE;
+ dev_dbg(dev->dev,
+ "FM_INT: Outstanding FM commands:\n"
+ "\tRadio: 0x%04X\n"
+ "\tAudio: 0x%04X\n",
+ info->hci_fm_cmd_func,
+ info->audio_fm_cmd_id);
+ info->tx_fm_audio_awaiting_irpt = false;
+ dev_dbg(dev->dev,
+ "FM Audio waiting for interrupt = false\n");
+ transmit_skb_from_tx_queue_fm(dev);
+ spin_unlock_bh(&info->tx_fm_lock);
+ }
+ }
+}
+
+/**
+ * send_bd_address() - Send HCI VS command with BD address to the chip.
+ */
+static void send_bd_address(struct cg2900_chip_info *info)
+{
+ struct bt_vs_store_in_fs_cmd *cmd;
+ u8 plen = sizeof(*cmd) + BT_BDADDR_SIZE;
+
+ cmd = kmalloc(plen, GFP_KERNEL);
+ if (!cmd) {
+ dev_err(info->dev, "send_bd_address could not allocate cmd\n");
+ return;
+ }
+
+ cmd->opcode = cpu_to_le16(CG2900_BT_OP_VS_STORE_IN_FS);
+ cmd->plen = BT_PARAM_LEN(plen);
+ cmd->user_id = CG2900_VS_STORE_IN_FS_USR_ID_BD_ADDR;
+ cmd->len = BT_BDADDR_SIZE;
+ /* Now copy the BD address received from user space control app. */
+ memcpy(cmd->data, bd_address, BT_BDADDR_SIZE);
+
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_SEND_BD_ADDRESS\n");
+ info->boot_state = BOOT_SEND_BD_ADDRESS;
+
+ cg2900_send_bt_cmd(info->user_in_charge, info->logger, cmd, plen);
+
+ kfree(cmd);
+}
+
+/**
+ * send_settings_file() - Transmit settings file.
+ *
+ * The send_settings_file() function transmit settings file.
+ * The file is read in parts to fit in HCI packets. When finished,
+ * close the settings file and send HCI reset to activate settings and patches.
+ */
+static void send_settings_file(struct cg2900_chip_info *info)
+{
+ int bytes_sent;
+
+ bytes_sent = cg2900_read_and_send_file_part(info->user_in_charge,
+ info->logger,
+ &info->file_info);
+ if (bytes_sent > 0) {
+ /* Data sent. Wait for CmdComplete */
+ return;
+ } else if (bytes_sent < 0) {
+ dev_err(BOOT_DEV, "send_settings_file: Error %d occurred\n",
+ bytes_sent);
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ chip_startup_finished(info, bytes_sent);
+ return;
+ }
+
+ /* No data was sent. This file is finished */
+ info->download_state = DOWNLOAD_SUCCESS;
+
+ /* Settings file finished. Release used resources */
+ dev_dbg(BOOT_DEV, "Settings file finished, release used resources\n");
+ release_firmware(info->file_info.fw_file);
+ info->file_info.fw_file = NULL;
+
+ dev_dbg(BOOT_DEV, "New file_load_state: FILE_LOAD_NO_MORE_FILES\n");
+ info->file_load_state = FILE_LOAD_NO_MORE_FILES;
+
+ /* Create and send HCI VS Store In FS command with bd address. */
+ send_bd_address(info);
+}
+
+/**
+ * send_patch_file - Transmit patch file.
+ *
+ * The send_patch_file() function transmit patch file.
+ * The file is read in parts to fit in HCI packets. When the complete file is
+ * transmitted, the file is closed.
+ * When finished, continue with settings file.
+ */
+static void send_patch_file(struct cg2900_chip_info *info)
+{
+ int err;
+ int bytes_sent;
+
+ bytes_sent = cg2900_read_and_send_file_part(info->user_in_charge,
+ info->logger,
+ &info->file_info);
+ if (bytes_sent > 0) {
+ /* Data sent. Wait for CmdComplete */
+ return;
+ } else if (bytes_sent < 0) {
+ dev_err(BOOT_DEV, "send_patch_file: Error %d occurred\n",
+ bytes_sent);
+ err = bytes_sent;
+ goto error_handling;
+ }
+
+ /* No data was sent. This file is finished */
+ info->download_state = DOWNLOAD_SUCCESS;
+
+ dev_dbg(BOOT_DEV, "Patch file finished, release used resources\n");
+ release_firmware(info->file_info.fw_file);
+ info->file_info.fw_file = NULL;
+
+ /* Retrieve the settings file */
+ err = request_firmware(&info->file_info.fw_file,
+ info->settings_file_name,
+ info->dev);
+ if (err) {
+ dev_err(BOOT_DEV, "Couldn't get settings file (%d)\n", err);
+ goto error_handling;
+ }
+ /* Now send the settings file */
+ dev_dbg(BOOT_DEV,
+ "New file_load_state: FILE_LOAD_GET_STATIC_SETTINGS\n");
+ info->file_load_state = FILE_LOAD_GET_STATIC_SETTINGS;
+ dev_dbg(BOOT_DEV, "New download_state: DOWNLOAD_PENDING\n");
+ info->download_state = DOWNLOAD_PENDING;
+ send_settings_file(info);
+ return;
+
+error_handling:
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ chip_startup_finished(info, err);
+}
+
+/**
+ * work_power_off_chip() - Work item to power off the chip.
+ * @work: Reference to work data.
+ *
+ * The work_power_off_chip() function handles transmission of the HCI command
+ * vs_power_switch_off and then informs the CG2900 Core that this chip driver is
+ * finished and the Core driver can now shut off the chip.
+ */
+static void work_power_off_chip(struct work_struct *work)
+{
+ struct sk_buff *skb = NULL;
+ u8 *h4_header;
+ struct cg2900_platform_data *pf_data;
+ struct cg2900_work *my_work;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ if (!work) {
+ dev_err(MAIN_DEV, "work_power_off_chip: work == NULL\n");
+ return;
+ }
+
+ my_work = container_of(work, struct cg2900_work, work);
+ dev = my_work->user_data;
+ info = dev->c_data;
+
+ /*
+ * Get the VS Power Switch Off command to use based on connected
+ * connectivity controller
+ */
+ pf_data = dev_get_platdata(dev->dev);
+ if (pf_data->get_power_switch_off_cmd)
+ skb = pf_data->get_power_switch_off_cmd(dev, NULL);
+
+ /*
+ * Transmit the received command.
+ * If no command found for the device, just continue
+ */
+ if (!skb) {
+ dev_err(dev->dev,
+ "Could not retrieve PowerSwitchOff command\n");
+ goto shut_down_chip;
+ }
+
+ dev_dbg(dev->dev,
+ "Got power_switch_off command. Add H4 header and transmit\n");
+
+ /*
+ * Move the data pointer to the H:4 header position and store
+ * the H4 header
+ */
+ h4_header = skb_push(skb, CG2900_SKB_RESERVE);
+ *h4_header = CHANNEL_BT_CMD;
+
+ dev_dbg(dev->dev, "New closing_state: CLOSING_POWER_SWITCH_OFF\n");
+ info->closing_state = CLOSING_POWER_SWITCH_OFF;
+
+ if (info->user_in_charge)
+ cg2900_tx_to_chip(info->user_in_charge, info->logger, skb);
+ else
+ cg2900_tx_no_user(dev, skb);
+
+ /*
+ * Mandatory to wait 500ms after the power_switch_off command has been
+ * transmitted, in order to make sure that the controller is ready.
+ */
+ schedule_timeout_interruptible(msecs_to_jiffies(POWER_SW_OFF_WAIT));
+
+shut_down_chip:
+ dev_dbg(dev->dev, "New closing_state: CLOSING_SHUT_DOWN\n");
+ info->closing_state = CLOSING_SHUT_DOWN;
+
+ /* Close the transport, which will power off the chip */
+ if (dev->t_cb.close)
+ dev->t_cb.close(dev);
+
+ /* Chip shut-down finished, set correct state and wake up the chip. */
+ dev_dbg(dev->dev, "New main_state: CG2900_IDLE\n");
+ info->main_state = CG2900_IDLE;
+ wake_up_interruptible_all(&main_wait_queue);
+
+ kfree(my_work);
+}
+
+/**
+ * work_reset_after_error() - Handle reset.
+ * @work: Reference to work data.
+ *
+ * Handle a reset after received Command Complete event.
+ */
+static void work_reset_after_error(struct work_struct *work)
+{
+ struct cg2900_work *my_work;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ if (!work) {
+ dev_err(MAIN_DEV, "work_reset_after_error: work == NULL\n");
+ return;
+ }
+
+ my_work = container_of(work, struct cg2900_work, work);
+ dev = my_work->user_data;
+ info = dev->c_data;
+
+ chip_startup_finished(info, -EIO);
+
+ kfree(my_work);
+}
+
+/**
+ * work_load_patch_and_settings() - Start loading patches and settings.
+ * @work: Reference to work data.
+ */
+static void work_load_patch_and_settings(struct work_struct *work)
+{
+ int err = 0;
+ bool file_found;
+ const struct firmware *patch_info;
+ const struct firmware *settings_info;
+ struct cg2900_work *my_work;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ if (!work) {
+ dev_err(MAIN_DEV,
+ "work_load_patch_and_settings: work == NULL\n");
+ return;
+ }
+
+ my_work = container_of(work, struct cg2900_work, work);
+ dev = my_work->user_data;
+ info = dev->c_data;
+
+ /* Check that we are in the right state */
+ if (info->boot_state != BOOT_GET_FILES_TO_LOAD)
+ goto finished;
+
+ /* Open patch info file. */
+ err = request_firmware(&patch_info, PATCH_INFO_FILE,
+ dev->dev);
+ if (err) {
+ dev_err(BOOT_DEV, "Couldn't get patch info file (%d)\n", err);
+ goto error_handling;
+ }
+
+ /*
+ * Now we have the patch info file.
+ * See if we can find the right patch file as well
+ */
+ file_found = cg2900_get_file_name(patch_info, &info->patch_file_name,
+ dev->chip.hci_revision,
+ dev->chip.hci_sub_version);
+
+ /* Now we are finished with the patch info file */
+ release_firmware(patch_info);
+
+ if (!file_found) {
+ dev_err(BOOT_DEV, "Couldn't find patch file! Major error\n");
+ goto error_handling;
+ }
+
+ /* Open settings info file. */
+ err = request_firmware(&settings_info,
+ FACTORY_SETTINGS_INFO_FILE,
+ dev->dev);
+ if (err) {
+ dev_err(BOOT_DEV, "Couldn't get settings info file (%d)\n",
+ err);
+ goto error_handling;
+ }
+
+ /*
+ * Now we have the settings info file.
+ * See if we can find the right settings file as well.
+ */
+ file_found = cg2900_get_file_name(settings_info,
+ &info->settings_file_name,
+ dev->chip.hci_revision,
+ dev->chip.hci_sub_version);
+
+ /* Now we are finished with the patch info file */
+ release_firmware(settings_info);
+
+ if (!file_found) {
+ dev_err(BOOT_DEV, "Couldn't find settings file! Major error\n");
+ goto error_handling;
+ }
+
+ /* We now all info needed */
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_DOWNLOAD_PATCH\n");
+ info->boot_state = BOOT_DOWNLOAD_PATCH;
+ dev_dbg(BOOT_DEV, "New download_state: DOWNLOAD_PENDING\n");
+ info->download_state = DOWNLOAD_PENDING;
+ dev_dbg(BOOT_DEV, "New file_load_state: FILE_LOAD_GET_PATCH\n");
+ info->file_load_state = FILE_LOAD_GET_PATCH;
+ info->file_info.chunk_id = 0;
+ info->file_info.file_offset = 0;
+ info->file_info.fw_file = NULL;
+
+ /* OK. Now it is time to download the patches */
+ err = request_firmware(&(info->file_info.fw_file),
+ info->patch_file_name,
+ dev->dev);
+ if (err < 0) {
+ dev_err(BOOT_DEV, "Couldn't get patch file (%d)\n", err);
+ goto error_handling;
+ }
+ send_patch_file(info);
+
+ goto finished;
+
+error_handling:
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ chip_startup_finished(info, -EIO);
+finished:
+ kfree(my_work);
+}
+
+/**
+ * work_cont_file_download() - A file block has been written.
+ * @work: Reference to work data.
+ *
+ * Handle a received HCI VS Write File Block Complete event.
+ * Normally this means continue to send files to the controller.
+ */
+static void work_cont_file_download(struct work_struct *work)
+{
+ struct cg2900_work *my_work;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ if (!work) {
+ dev_err(MAIN_DEV, "work_cont_file_download: work == NULL\n");
+ return;
+ }
+
+ my_work = container_of(work, struct cg2900_work, work);
+ dev = my_work->user_data;
+ info = dev->c_data;
+
+ /* Continue to send patches or settings to the controller */
+ if (info->file_load_state == FILE_LOAD_GET_PATCH)
+ send_patch_file(info);
+ else if (info->file_load_state == FILE_LOAD_GET_STATIC_SETTINGS)
+ send_settings_file(info);
+ else
+ dev_dbg(BOOT_DEV, "No more files to load\n");
+
+ kfree(my_work);
+}
+
+/**
+ * handle_reset_cmd_complete() - Handles HCI Reset Command Complete event.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_reset_cmd_complete(struct cg2900_chip_dev *dev, u8 *data)
+{
+ u8 status = data[0];
+ struct cg2900_chip_info *info = dev->c_data;
+
+ dev_dbg(BOOT_DEV, "Received Reset complete event with status 0x%X\n",
+ status);
+
+ if (CG2900_CLOSING != info->main_state ||
+ CLOSING_RESET != info->closing_state)
+ return false;
+
+ if (HCI_BT_ERROR_NO_ERROR != status) {
+ /*
+ * Continue in case of error, the chip is going to be shut down
+ * anyway.
+ */
+ dev_err(BOOT_DEV, "Command complete for HciReset received with "
+ "error 0x%X\n", status);
+ }
+
+ cg2900_create_work_item(info->wq, work_power_off_chip, dev);
+
+ return true;
+}
+
+/**
+ * handle_vs_store_in_fs_cmd_complete() - Handles HCI VS StoreInFS Command Complete event.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_vs_store_in_fs_cmd_complete(struct cg2900_chip_dev *dev,
+ u8 *data)
+{
+ u8 status = data[0];
+ struct cg2900_chip_info *info = dev->c_data;
+
+ dev_dbg(BOOT_DEV,
+ "Received Store_in_FS complete event with status 0x%X\n",
+ status);
+
+ if (info->boot_state != BOOT_SEND_BD_ADDRESS)
+ return false;
+
+ if (HCI_BT_ERROR_NO_ERROR == status) {
+ struct hci_command_hdr cmd;
+
+ /* Send HCI SystemReset command to activate patches */
+ dev_dbg(BOOT_DEV,
+ "New boot_state: BOOT_ACTIVATE_PATCHES_AND_SETTINGS\n");
+ info->boot_state = BOOT_ACTIVATE_PATCHES_AND_SETTINGS;
+
+ cmd.opcode = cpu_to_le16(CG2900_BT_OP_VS_SYSTEM_RESET);
+ cmd.plen = 0; /* No parameters for System Reset */
+ cg2900_send_bt_cmd(info->user_in_charge, info->logger, &cmd,
+ sizeof(cmd));
+ } else {
+ dev_err(BOOT_DEV,
+ "Command complete for StoreInFS received with error "
+ "0x%X\n", status);
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ cg2900_create_work_item(info->wq, work_reset_after_error, dev);
+ }
+
+ return true;
+}
+
+/**
+ * handle_vs_write_file_block_cmd_complete() - Handles HCI VS WriteFileBlock Command Complete event.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_vs_write_file_block_cmd_complete(struct cg2900_chip_dev *dev,
+ u8 *data)
+{
+ u8 status = data[0];
+ struct cg2900_chip_info *info = dev->c_data;
+
+ if (info->boot_state != BOOT_DOWNLOAD_PATCH ||
+ info->download_state != DOWNLOAD_PENDING)
+ return false;
+
+ if (HCI_BT_ERROR_NO_ERROR == status)
+ cg2900_create_work_item(info->wq, work_cont_file_download, dev);
+ else {
+ dev_err(BOOT_DEV,
+ "Command complete for WriteFileBlock received with"
+ " error 0x%X\n", status);
+ dev_dbg(BOOT_DEV, "New download_state: DOWNLOAD_FAILED\n");
+ info->download_state = DOWNLOAD_FAILED;
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ if (info->file_info.fw_file) {
+ release_firmware(info->file_info.fw_file);
+ info->file_info.fw_file = NULL;
+ }
+ cg2900_create_work_item(info->wq, work_reset_after_error, dev);
+ }
+
+ return true;
+}
+
+/**
+ * handle_vs_write_file_block_cmd_status() - Handles HCI VS WriteFileBlock Command Status event.
+ * @status: Returned status of WriteFileBlock command.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_vs_write_file_block_cmd_status(struct cg2900_chip_dev *dev,
+ u8 status)
+{
+ struct cg2900_chip_info *info = dev->c_data;
+
+ if (info->boot_state != BOOT_DOWNLOAD_PATCH ||
+ info->download_state != DOWNLOAD_PENDING)
+ return false;
+
+ /*
+ * Only do something if there is an error. Otherwise we will wait for
+ * CmdComplete.
+ */
+ if (HCI_BT_ERROR_NO_ERROR != status) {
+ dev_err(BOOT_DEV,
+ "Command status for WriteFileBlock received with"
+ " error 0x%X\n", status);
+ dev_dbg(BOOT_DEV, "New download_state: DOWNLOAD_FAILED\n");
+ info->download_state = DOWNLOAD_FAILED;
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ if (info->file_info.fw_file) {
+ release_firmware(info->file_info.fw_file);
+ info->file_info.fw_file = NULL;
+ }
+ cg2900_create_work_item(info->wq, work_reset_after_error, dev);
+ }
+
+ return true;
+}
+
+/**
+ * handle_vs_power_switch_off_cmd_complete() - Handles HCI VS PowerSwitchOff Command Complete event.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_vs_power_switch_off_cmd_complete(struct cg2900_chip_dev *dev,
+ u8 *data)
+{
+ u8 status = data[0];
+ struct cg2900_chip_info *info = dev->c_data;
+
+ if (CLOSING_POWER_SWITCH_OFF != info->closing_state)
+ return false;
+
+ dev_dbg(BOOT_DEV,
+ "handle_vs_power_switch_off_cmd_complete status %d\n", status);
+
+ /*
+ * We were waiting for this but we don't need to do anything upon
+ * reception except warn for error status
+ */
+ if (HCI_BT_ERROR_NO_ERROR != status)
+ dev_err(BOOT_DEV,
+ "Command Complete for PowerSwitchOff received with "
+ "error 0x%X", status);
+
+ return true;
+}
+
+/**
+ * handle_vs_system_reset_cmd_complete() - Handle HCI VS SystemReset Command Complete event.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_vs_system_reset_cmd_complete(struct cg2900_chip_dev *dev,
+ u8 *data)
+{
+ u8 status = data[0];
+ struct bt_vs_bt_enable_cmd cmd;
+ struct cg2900_chip_info *info = dev->c_data;
+
+ if (info->boot_state != BOOT_ACTIVATE_PATCHES_AND_SETTINGS)
+ return false;
+
+ dev_dbg(BOOT_DEV, "handle_vs_system_reset_cmd_complete status %d\n",
+ status);
+
+ if (HCI_BT_ERROR_NO_ERROR == status) {
+ /*
+ * We are now almost finished. Shut off BT Core. It will be
+ * re-enabled by the Bluetooth driver when needed.
+ */
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_DISABLE_BT\n");
+ info->boot_state = BOOT_DISABLE_BT;
+ cmd.op_code = cpu_to_le16(CG2900_BT_OP_VS_BT_ENABLE);
+ cmd.plen = BT_PARAM_LEN(sizeof(cmd));
+ cmd.enable = CG2900_BT_DISABLE;
+ cg2900_send_bt_cmd(info->user_in_charge, info->logger, &cmd,
+ sizeof(cmd));
+ } else {
+ dev_err(BOOT_DEV,
+ "Received Reset complete event with status 0x%X\n",
+ status);
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ chip_startup_finished(info, -EIO);
+ }
+
+ return true;
+}
+
+/**
+ * handle_vs_bt_enable_cmd_status() - Handles HCI VS BtEnable Command Status event.
+ * @status: Returned status of BtEnable command.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_vs_bt_enable_cmd_status(struct cg2900_chip_dev *dev,
+ u8 status)
+{
+ struct cg2900_chip_info *info = dev->c_data;
+
+ if (info->boot_state != BOOT_DISABLE_BT)
+ return false;
+
+ dev_dbg(BOOT_DEV, "handle_vs_bt_enable_cmd_status status %d\n", status);
+
+ /*
+ * Only do something if there is an error. Otherwise we will wait for
+ * CmdComplete.
+ */
+ if (HCI_BT_ERROR_NO_ERROR != status) {
+ dev_err(BOOT_DEV,
+ "Received BtEnable status event with status 0x%X\n",
+ status);
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ chip_startup_finished(info, -EIO);
+ }
+
+ return true;
+}
+
+/**
+ * handle_vs_bt_enable_cmd_complete() - Handle HCI VS BtEnable Command Complete event.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * true, if packet was handled internally,
+ * false, otherwise.
+ */
+static bool handle_vs_bt_enable_cmd_complete(struct cg2900_chip_dev *dev,
+ u8 *data)
+{
+ u8 status = data[0];
+ struct cg2900_chip_info *info = dev->c_data;
+
+ if (info->boot_state != BOOT_DISABLE_BT)
+ return false;
+
+ dev_dbg(BOOT_DEV, "handle_vs_bt_enable_cmd_complete status %d\n",
+ status);
+
+ if (HCI_BT_ERROR_NO_ERROR == status) {
+ /*
+ * The boot sequence is now finished successfully.
+ * Set states and signal to waiting thread.
+ */
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_READY\n");
+ info->boot_state = BOOT_READY;
+ chip_startup_finished(info, 0);
+ } else {
+ dev_err(BOOT_DEV,
+ "Received BtEnable complete event with status 0x%X\n",
+ status);
+ dev_dbg(BOOT_DEV, "New boot_state: BOOT_FAILED\n");
+ info->boot_state = BOOT_FAILED;
+ chip_startup_finished(info, -EIO);
+ }
+
+ return true;
+}
+
+/**
+ * handle_rx_data_bt_evt() - Check if received data should be handled in CG2900 chip driver.
+ * @skb: Data packet
+ *
+ * The handle_rx_data_bt_evt() function checks if received data should be
+ * handled in CG2900 chip driver. If so handle it correctly.
+ * Received data is always HCI BT Event.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_rx_data_bt_evt(struct cg2900_chip_dev *dev,
+ struct sk_buff *skb)
+{
+ bool pkt_handled = false;
+ /* skb cannot be NULL here so it is safe to de-reference */
+ u8 *data = skb->data;
+ struct hci_event_hdr *evt;
+ u16 op_code;
+
+ evt = (struct hci_event_hdr *)data;
+ data += sizeof(*evt);
+
+ /* First check the event code. */
+ if (HCI_EV_CMD_COMPLETE == evt->evt) {
+ struct hci_ev_cmd_complete *cmd_complete;
+
+ cmd_complete = (struct hci_ev_cmd_complete *)data;
+ op_code = le16_to_cpu(cmd_complete->opcode);
+ dev_dbg(dev->dev,
+ "Received Command Complete: op_code = 0x%04X\n",
+ op_code);
+ /* Move to first byte after OCF */
+ data += sizeof(*cmd_complete);
+
+ if (op_code == HCI_OP_RESET)
+ pkt_handled = handle_reset_cmd_complete(dev, data);
+ else if (op_code == CG2900_BT_OP_VS_STORE_IN_FS)
+ pkt_handled = handle_vs_store_in_fs_cmd_complete(dev,
+ data);
+ else if (op_code == CG2900_BT_OP_VS_WRITE_FILE_BLOCK)
+ pkt_handled =
+ handle_vs_write_file_block_cmd_complete(dev,
+ data);
+ else if (op_code == CG2900_BT_OP_VS_POWER_SWITCH_OFF)
+ pkt_handled =
+ handle_vs_power_switch_off_cmd_complete(dev,
+ data);
+ else if (op_code == CG2900_BT_OP_VS_SYSTEM_RESET)
+ pkt_handled = handle_vs_system_reset_cmd_complete(dev,
+ data);
+ else if (op_code == CG2900_BT_OP_VS_BT_ENABLE)
+ pkt_handled = handle_vs_bt_enable_cmd_complete(dev,
+ data);
+ } else if (HCI_EV_CMD_STATUS == evt->evt) {
+ struct hci_ev_cmd_status *cmd_status;
+
+ cmd_status = (struct hci_ev_cmd_status *)data;
+
+ op_code = le16_to_cpu(cmd_status->opcode);
+
+ dev_dbg(dev->dev, "Received Command Status: op_code = 0x%04X\n",
+ op_code);
+
+ if (op_code == CG2900_BT_OP_VS_WRITE_FILE_BLOCK)
+ pkt_handled = handle_vs_write_file_block_cmd_status
+ (dev, cmd_status->status);
+ else if (op_code == CG2900_BT_OP_VS_BT_ENABLE)
+ pkt_handled = handle_vs_bt_enable_cmd_status
+ (dev, cmd_status->status);
+ } else if (HCI_EV_HW_ERROR == evt->evt) {
+ struct hci_ev_hw_error *hw_error;
+
+ hw_error = (struct hci_ev_hw_error *)data;
+ /*
+ * Only do a printout. There might be a receiving stack that can
+ * handle this event
+ */
+ dev_err(dev->dev, "HW Error event received with error 0x%02X\n",
+ hw_error->hw_code);
+ return false;
+ } else
+ return false;
+
+ if (pkt_handled)
+ kfree_skb(skb);
+
+ return pkt_handled;
+}
+
+/**
+ * transmit_skb_with_flow_ctrl_bt() - Send the BT skb to the controller if it is allowed or queue it.
+ * @user: Current user.
+ * @skb: Data packet.
+ *
+ * The transmit_skb_with_flow_ctrl_bt() function checks if there are
+ * tickets available and if so transmits buffer to controller. Otherwise the skb
+ * and user name is stored in a list for later sending.
+ * If enabled, copy the transmitted data to the HCI logger as well.
+ */
+static void transmit_skb_with_flow_ctrl_bt(struct cg2900_user_data *user,
+ struct sk_buff *skb)
+{
+ struct cg2900_chip_dev *dev = cg2900_get_prv(user);
+ struct cg2900_chip_info *info = dev->c_data;
+
+ /*
+ * Because there are more users of some H4 channels (currently audio
+ * application for BT command and FM channel) we need to have an
+ * internal HCI command flow control in CG2900 driver.
+ * So check here how many tickets we have and store skb in a queue if
+ * there are no tickets left. The skb will be sent later when we get
+ * more ticket(s).
+ */
+ spin_lock_bh(&info->tx_bt_lock);
+
+ if (info->tx_nr_pkts_allowed_bt > 0) {
+ info->tx_nr_pkts_allowed_bt--;
+ dev_dbg(user->dev, "New tx_nr_pkts_allowed_bt = %d\n",
+ info->tx_nr_pkts_allowed_bt);
+
+ /*
+ * If it's command from audio app store the OpCode,
+ * it'll be used later to decide where to dispatch Command
+ * Complete event.
+ */
+ if (info->bt_audio == user) {
+ struct hci_command_hdr *hdr = (struct hci_command_hdr *)
+ (skb->data + HCI_H4_SIZE);
+
+ info->audio_bt_cmd_op = le16_to_cpu(hdr->opcode);
+ dev_dbg(user->dev,
+ "Sending cmd from audio driver, saving "
+ "OpCode = 0x%X\n",
+ info->audio_bt_cmd_op);
+ }
+
+ cg2900_tx_to_chip(user, info->logger, skb);
+ } else {
+ dev_dbg(user->dev, "Not allowed to send cmd to controller, "
+ "storing in TX queue\n");
+
+ cg2900_skb_data(skb)->user = user;
+ skb_queue_tail(&info->tx_queue_bt, skb);
+ }
+ spin_unlock_bh(&info->tx_bt_lock);
+}
+
+/**
+ * transmit_skb_with_flow_ctrl_fm() - Send the FM skb to the controller if it is allowed or queue it.
+ * @user: Current user.
+ * @skb: Data packet.
+ *
+ * The transmit_skb_with_flow_ctrl_fm() function checks if chip is available and
+ * if so transmits buffer to controller. Otherwise the skb and user name is
+ * stored in a list for later sending.
+ * Also it updates the FM radio mode if it's FM GOTOMODE command, this is needed
+ * to know how to handle some FM DO commands complete events.
+ * If enabled, copy the transmitted data to the HCI logger as well.
+ */
+static void transmit_skb_with_flow_ctrl_fm(struct cg2900_user_data *user,
+ struct sk_buff *skb)
+{
+ u8 cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ u16 cmd_id = CG2900_FM_CMD_NONE;
+ struct cg2900_chip_dev *dev = cg2900_get_prv(user);
+ struct cg2900_chip_info *info = dev->c_data;
+
+ fm_parse_cmd(&(skb->data[0]), &cmd_func, &cmd_id);
+
+ /*
+ * If this is an FM IP disable or reset send command and also reset
+ * the flow control and audio user.
+ */
+ if (cmd_func == CG2900_FM_CMD_PARAM_DISABLE ||
+ cmd_func == CG2900_FM_CMD_PARAM_RESET) {
+ spin_lock_bh(&info->tx_fm_lock);
+ fm_reset_flow_ctrl(info);
+ spin_unlock_bh(&info->tx_fm_lock);
+ cg2900_tx_to_chip(user, info->logger, skb);
+ return;
+ }
+
+ /*
+ * If this is a FM user and no FM audio user command pending just send
+ * FM command. It is up to the user of the FM channel to handle its own
+ * flow control.
+ */
+ spin_lock_bh(&info->tx_fm_lock);
+ if (info->fm_audio != user &&
+ info->audio_fm_cmd_id == CG2900_FM_CMD_NONE) {
+ info->hci_fm_cmd_func = cmd_func;
+ dev_dbg(user->dev, "Sending FM radio command 0x%04X\n",
+ info->hci_fm_cmd_func);
+ /* If a GotoMode command update FM mode */
+ fm_update_mode(info, &skb->data[0]);
+ cg2900_tx_to_chip(user, info->logger, skb);
+ } else if (info->fm_audio == user &&
+ info->hci_fm_cmd_func == CG2900_FM_CMD_PARAM_NONE &&
+ info->audio_fm_cmd_id == CG2900_FM_CMD_NONE) {
+ /*
+ * If it's command from fm audio user store the command id.
+ * It'll be used later to decide where to dispatch
+ * command complete event.
+ */
+ info->audio_fm_cmd_id = cmd_id;
+ dev_dbg(user->dev, "Sending FM audio command 0x%04X\n",
+ info->audio_fm_cmd_id);
+ cg2900_tx_to_chip(user, info->logger, skb);
+ } else {
+ dev_dbg(user->dev,
+ "Not allowed to send FM cmd to controller, storing in "
+ "TX queue\n");
+
+ cg2900_skb_data(skb)->user = user;
+ skb_queue_tail(&info->tx_queue_fm, skb);
+ }
+ spin_unlock_bh(&info->tx_fm_lock);
+}
+
+/**
+ * is_bt_audio_user() - Checks if this packet is for the BT audio user.
+ * @info: CG2900 info.
+ * @h4_channel: H:4 channel for this packet.
+ * @skb: Packet to check.
+ *
+ * Returns:
+ * true if packet is for BT audio user.
+ * false otherwise.
+ */
+static bool is_bt_audio_user(struct cg2900_chip_info *info, int h4_channel,
+ const struct sk_buff * const skb)
+{
+ struct hci_event_hdr *hdr;
+ u8 *payload;
+ u16 opcode;
+
+ if (h4_channel != CHANNEL_BT_EVT)
+ return false;
+
+ hdr = (struct hci_event_hdr *)skb->data;
+ payload = (u8 *)(hdr + 1); /* follows header */
+
+ if (HCI_EV_CMD_COMPLETE == hdr->evt)
+ opcode = le16_to_cpu(
+ ((struct hci_ev_cmd_complete *)payload)->opcode);
+ else if (HCI_EV_CMD_STATUS == hdr->evt)
+ opcode = le16_to_cpu(
+ ((struct hci_ev_cmd_status *)payload)->opcode);
+ else
+ return false;
+
+ if (opcode != info->audio_bt_cmd_op)
+ return false;
+
+ dev_dbg(info->bt_audio->dev, "Audio BT OpCode match = 0x%04X\n",
+ opcode);
+ info->audio_bt_cmd_op = CG2900_BT_OPCODE_NONE;
+ return true;
+}
+
+/**
+ * is_fm_audio_user() - Checks if this packet is for the FM audio user.
+ * @info: CG2900 info.
+ * @h4_channel: H:4 channel for this packet.
+ * @skb: Packet to check.
+ *
+ * Returns:
+ * true if packet is for BT audio user.
+ * false otherwise.
+ */
+static bool is_fm_audio_user(struct cg2900_chip_info *info, int h4_channel,
+ const struct sk_buff * const skb)
+{
+ u8 cmd_func;
+ u16 cmd_id;
+ u16 irpt_val;
+ u8 event;
+
+ if (h4_channel != CHANNEL_FM_RADIO)
+ return false;
+
+ cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ cmd_id = CG2900_FM_CMD_NONE;
+ irpt_val = 0;
+ event = CG2900_FM_EVENT_UNKNOWN;
+
+ fm_parse_event(&skb->data[0], &event, &cmd_func, &cmd_id,
+ &irpt_val);
+ /* Check if command complete event FM legacy interface. */
+ if ((event == CG2900_FM_EVENT_CMD_COMPLETE) &&
+ (cmd_func == CG2900_FM_CMD_PARAM_WRITECOMMAND) &&
+ (cmd_id == info->audio_fm_cmd_id)) {
+ dev_dbg(info->fm_audio->dev,
+ "FM Audio Function Code match = 0x%04X\n",
+ cmd_id);
+ return true;
+ }
+
+ /* Check if Interrupt legacy interface. */
+ if ((event == CG2900_FM_EVENT_INTERRUPT) &&
+ (fm_is_do_cmd_irpt(irpt_val)) &&
+ (info->tx_fm_audio_awaiting_irpt))
+ return true;
+
+ return false;
+}
+
+/**
+ * data_from_chip() - Called when data is received from the chip.
+ * @dev: Chip info.
+ * @cg2900_dev: CG2900 user for this packet.
+ * @skb: Packet received.
+ *
+ * The data_from_chip() function updates flow control and checks
+ * if packet is a response for a packet it itself has transmitted. If not it
+ * finds the correct user and sends the packet* to the user.
+ */
+static void data_from_chip(struct cg2900_chip_dev *dev,
+ struct sk_buff *skb)
+{
+ int h4_channel;
+ struct list_head *cursor;
+ struct cg2900_channel_item *tmp;
+ struct cg2900_chip_info *info = dev->c_data;
+ struct cg2900_user_data *user = NULL;
+
+ h4_channel = skb->data[0];
+ skb_pull(skb, HCI_H4_SIZE);
+
+ spin_lock_bh(&info->rw_lock);
+ /* First check if it is a BT or FM audio event */
+ if (is_bt_audio_user(info, h4_channel, skb))
+ user = info->bt_audio;
+ else if (is_fm_audio_user(info, h4_channel, skb))
+ user = info->fm_audio;
+ spin_unlock_bh(&info->rw_lock);
+
+ /* Now check if we should update flow control */
+ if (h4_channel == CHANNEL_BT_EVT)
+ update_flow_ctrl_bt(dev, skb);
+ else if (h4_channel == CHANNEL_FM_RADIO)
+ update_flow_ctrl_fm(dev, skb);
+
+ /* Then check if this is a response to data we have sent */
+ if (h4_channel == CHANNEL_BT_EVT && handle_rx_data_bt_evt(dev, skb))
+ return;
+
+ spin_lock_bh(&info->rw_lock);
+
+ if (user)
+ goto user_found;
+
+ /* Let's see if it is the last user */
+ if (info->last_user && info->last_user->h4_channel == h4_channel) {
+ user = info->last_user;
+ goto user_found;
+ }
+
+ /* Search through the list of all open channels to find the user */
+ list_for_each(cursor, &info->open_channels) {
+ tmp = list_entry(cursor, struct cg2900_channel_item, list);
+ if (tmp->user->h4_channel == h4_channel) {
+ user = tmp->user;
+ goto user_found;
+ }
+ }
+
+user_found:
+ if (user != info->bt_audio && user != info->fm_audio)
+ info->last_user = user;
+
+ spin_unlock_bh(&info->rw_lock);
+
+ if (user)
+ user->read_cb(user, skb);
+ else {
+ dev_err(dev->dev,
+ "Could not find corresponding user to h4_channel %d\n",
+ h4_channel);
+ kfree_skb(skb);
+ }
+}
+
+/**
+ * chip_removed() - Called when transport has been removed.
+ * @dev: Chip device.
+ *
+ * Removes registered MFD devices and frees internal resources.
+ */
+static void chip_removed(struct cg2900_chip_dev *dev)
+{
+ struct cg2900_chip_info *info = dev->c_data;
+
+ mfd_remove_devices(dev->dev);
+ kfree(info->settings_file_name);
+ kfree(info->patch_file_name);
+ destroy_workqueue(info->wq);
+ kfree(info);
+ dev->c_data = NULL;
+ dev->c_cb.chip_removed = NULL;
+ dev->c_cb.data_from_chip = NULL;
+}
+
+/**
+ * last_bt_user_removed() - Called when last BT user is removed.
+ * @info: Chip handler info.
+ *
+ * Clears out TX queue for BT.
+ */
+static void last_bt_user_removed(struct cg2900_chip_info *info)
+{
+ spin_lock_bh(&info->tx_bt_lock);
+ skb_queue_purge(&info->tx_queue_bt);
+
+ /*
+ * Reset number of packets allowed and number of outstanding
+ * BT commands.
+ */
+ info->tx_nr_pkts_allowed_bt = 1;
+ /* Reset the audio_bt_cmd_op. */
+ info->audio_bt_cmd_op = CG2900_BT_OPCODE_NONE;
+ spin_unlock_bh(&info->tx_bt_lock);
+}
+
+/**
+ * last_fm_user_removed() - Called when last FM user is removed.
+ * @info: Chip handler info.
+ *
+ * Clears out TX queue for BT.
+ */
+static void last_fm_user_removed(struct cg2900_chip_info *info)
+{
+ spin_lock_bh(&info->tx_fm_lock);
+ fm_reset_flow_ctrl(info);
+ spin_unlock_bh(&info->tx_fm_lock);
+}
+
+/**
+ * chip_shutdown() - Reset and power the chip off.
+ * @user: MFD device.
+ */
+static void chip_shutdown(struct cg2900_user_data *user)
+{
+ struct hci_command_hdr cmd;
+ struct cg2900_chip_dev *dev = cg2900_get_prv(user);
+ struct cg2900_chip_info *info = dev->c_data;
+
+ dev_dbg(user->dev, "chip_shutdown\n");
+
+ /* First do a quick power switch of the chip to assure a good state */
+ if (dev->t_cb.set_chip_power)
+ dev->t_cb.set_chip_power(dev, false);
+
+ /*
+ * Wait 50ms before continuing to be sure that the chip detects
+ * chip power off.
+ */
+ schedule_timeout_interruptible(
+ msecs_to_jiffies(LINE_TOGGLE_DETECT_TIMEOUT));
+
+ if (dev->t_cb.set_chip_power)
+ dev->t_cb.set_chip_power(dev, true);
+
+ /* Wait 100ms before continuing to be sure that the chip is ready */
+ schedule_timeout_interruptible(msecs_to_jiffies(CHIP_READY_TIMEOUT));
+
+ if (user != info->bt_audio && user != info->fm_audio)
+ info->last_user = user;
+ info->user_in_charge = user;
+
+ /*
+ * Transmit HCI reset command to ensure the chip is using
+ * the correct transport and to put BT part in reset.
+ */
+ dev_dbg(user->dev, "New closing_state: CLOSING_RESET\n");
+ info->closing_state = CLOSING_RESET;
+ cmd.opcode = cpu_to_le16(HCI_OP_RESET);
+ cmd.plen = 0; /* No parameters for HCI reset */
+ cg2900_send_bt_cmd(info->user_in_charge, info->logger, &cmd,
+ sizeof(cmd));
+}
+
+/**
+ * chip_startup_finished() - Called when chip startup has finished.
+ * @info: Chip handler info.
+ * @err: Result of chip startup, 0 for no error.
+ *
+ * Shuts down the chip upon error, sets state to active, wakes waiting threads,
+ * and informs transport that startup has finished.
+ */
+static void chip_startup_finished(struct cg2900_chip_info *info, int err)
+{
+ dev_dbg(BOOT_DEV, "chip_startup_finished (%d)\n", err);
+
+ if (err)
+ /* Shutdown the chip */
+ chip_shutdown(info->user_in_charge);
+ else {
+ dev_dbg(BOOT_DEV, "New main_state: CG2900_ACTIVE\n");
+ info->main_state = CG2900_ACTIVE;
+ }
+
+ wake_up_interruptible_all(&main_wait_queue);
+
+ if (err)
+ return;
+
+ if (!info->chip_dev->t_cb.chip_startup_finished)
+ dev_dbg(BOOT_DEV, "chip_startup_finished callback not found\n");
+ else
+ info->chip_dev->t_cb.chip_startup_finished(info->chip_dev);
+}
+
+/**
+ * cg2900_open() - Called when user wants to open an H4 channel.
+ * @user: MFD device to open.
+ *
+ * Checks that H4 channel is not already opened. If chip is not started, starts
+ * up the chip. Sets channel as opened and adds user to active users.
+ *
+ * Returns:
+ * 0 if success.
+ * -EINVAL if user is NULL or read_cb is NULL.
+ * -EBUSY if chip is in transit state (being started or shutdown).
+ * -EACCES if H4 channel is already opened.
+ * -ENOMEM if allocation fails.
+ * -EIO if chip startup fails.
+ * Error codes generated by t_cb.open.
+ */
+static int cg2900_open(struct cg2900_user_data *user)
+{
+ int err;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+ struct list_head *cursor;
+ struct cg2900_channel_item *tmp;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV, "cg2900_open: Calling with NULL pointer\n");
+ return -EINVAL;
+ }
+
+ if (!user->read_cb) {
+ dev_err(user->dev, "cg2900_open: read_cb missing\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(user->dev, "cg2900_open\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ mutex_lock(&main_info->man_mutex);
+
+ /*
+ * Add a minor wait in order to avoid CPU blocking, looping openings.
+ * Note there will of course be no wait if we are already in the right
+ * state.
+ */
+ err = wait_event_interruptible_timeout(main_wait_queue,
+ (CG2900_IDLE == info->main_state ||
+ CG2900_ACTIVE == info->main_state),
+ msecs_to_jiffies(LINE_TOGGLE_DETECT_TIMEOUT));
+ if (err <= 0) {
+ if (CG2900_INIT == info->main_state)
+ dev_err(user->dev, "Transport not opened\n");
+ else
+ dev_err(user->dev, "cg2900_open currently busy (0x%X). "
+ "Try again\n", info->main_state);
+ err = -EBUSY;
+ goto err_free_mutex;
+ }
+
+ err = 0;
+
+ list_for_each(cursor, &info->open_channels) {
+ tmp = list_entry(cursor, struct cg2900_channel_item, list);
+ if (tmp->user->h4_channel == user->h4_channel &&
+ tmp->user->is_audio == user->is_audio) {
+ dev_err(user->dev, "Channel %d is already opened\n",
+ user->h4_channel);
+ err = -EACCES;
+ goto err_free_mutex;
+ }
+ }
+
+ tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
+ if (!tmp) {
+ dev_err(user->dev, "Could not allocate tmp\n");
+ err = -ENOMEM;
+ goto err_free_mutex;
+ }
+ tmp->user = user;
+
+ if (CG2900_ACTIVE != info->main_state &&
+ !user->chip_independent) {
+ /* Open transport and start-up the chip */
+ if (dev->t_cb.set_chip_power)
+ dev->t_cb.set_chip_power(dev, true);
+
+ /* Wait to be sure that the chip is ready */
+ schedule_timeout_interruptible(
+ msecs_to_jiffies(CHIP_READY_TIMEOUT));
+
+ if (dev->t_cb.open) {
+ err = dev->t_cb.open(dev);
+ if (err) {
+ if (dev->t_cb.set_chip_power)
+ dev->t_cb.set_chip_power(dev, false);
+ goto err_free_list_item;
+ }
+ }
+
+ /* Start the boot sequence */
+ info->user_in_charge = user;
+ if (user != info->bt_audio && user != info->fm_audio)
+ info->last_user = user;
+ dev_dbg(user->dev, "New boot_state: BOOT_GET_FILES_TO_LOAD\n");
+ info->boot_state = BOOT_GET_FILES_TO_LOAD;
+ dev_dbg(user->dev, "New main_state: CG2900_BOOTING\n");
+ info->main_state = CG2900_BOOTING;
+ cg2900_create_work_item(info->wq, work_load_patch_and_settings,
+ dev);
+
+ dev_dbg(user->dev, "Wait up to 15 seconds for chip to start\n");
+ wait_event_interruptible_timeout(main_wait_queue,
+ (CG2900_ACTIVE == info->main_state ||
+ CG2900_IDLE == info->main_state),
+ msecs_to_jiffies(CHIP_STARTUP_TIMEOUT));
+ if (CG2900_ACTIVE != info->main_state) {
+ dev_err(user->dev, "CG2900 driver failed to start\n");
+
+ if (dev->t_cb.close)
+ dev->t_cb.close(dev);
+
+ dev_dbg(user->dev, "New main_state: CG2900_IDLE\n");
+ info->main_state = CG2900_IDLE;
+ err = -EIO;
+ goto err_free_list_item;
+ }
+ }
+
+ list_add_tail(&tmp->list, &info->open_channels);
+
+ user->opened = true;
+
+ dev_dbg(user->dev, "H:4 channel opened\n");
+
+ mutex_unlock(&main_info->man_mutex);
+ return 0;
+err_free_list_item:
+ kfree(tmp);
+err_free_mutex:
+ mutex_unlock(&main_info->man_mutex);
+ return err;
+}
+
+/**
+ * cg2900_hci_log_open() - Called when user wants to open HCI logger channel.
+ * @user: MFD device to open.
+ *
+ * Registers user as hci_logger and calls @cg2900_open to open the channel.
+ *
+ * Returns:
+ * 0 if success.
+ * -EINVAL if user is NULL.
+ * -EACCES if H4 channel is already opened.
+ * Error codes generated by cg2900_open.
+ */
+static int cg2900_hci_log_open(struct cg2900_user_data *user)
+{
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+ int err;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV,
+ "cg2900_hci_log_open: Calling with NULL pointer\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(user->dev, "cg2900_hci_log_open\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ if (info->logger) {
+ dev_err(user->dev, "HCI Logger already stored\n");
+ return -EACCES;
+ }
+
+ info->logger = user;
+ err = cg2900_open(user);
+ if (err)
+ info->logger = NULL;
+ return err;
+}
+
+/**
+ * cg2900_bt_audio_open() - Called when user wants to open BT audio channel.
+ * @user: MFD device to open.
+ *
+ * Registers user as bt_audio and calls @cg2900_open to open the channel.
+ *
+ * Returns:
+ * 0 if success.
+ * -EINVAL if user is NULL.
+ * -EACCES if H4 channel is already opened.
+ * Error codes generated by cg2900_open.
+ */
+static int cg2900_bt_audio_open(struct cg2900_user_data *user)
+{
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+ int err;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV,
+ "cg2900_bt_audio_open: Calling with NULL pointer\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(user->dev, "cg2900_bt_audio_open\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ if (info->bt_audio) {
+ dev_err(user->dev, "BT Audio already stored\n");
+ return -EACCES;
+ }
+
+ info->bt_audio = user;
+ err = cg2900_open(user);
+ if (err)
+ info->bt_audio = NULL;
+ return err;
+}
+
+/**
+ * cg2900_fm_audio_open() - Called when user wants to open FM audio channel.
+ * @user: MFD device to open.
+ *
+ * Registers user as fm_audio and calls @cg2900_open to open the channel.
+ *
+ * Returns:
+ * 0 if success.
+ * -EINVAL if user is NULL.
+ * -EACCES if H4 channel is already opened.
+ * Error codes generated by cg2900_open.
+ */
+static int cg2900_fm_audio_open(struct cg2900_user_data *user)
+{
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+ int err;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV,
+ "cg2900_fm_audio_open: Calling with NULL pointer\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(user->dev, "cg2900_fm_audio_open\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ if (info->fm_audio) {
+ dev_err(user->dev, "FM Audio already stored\n");
+ return -EACCES;
+ }
+
+ info->fm_audio = user;
+ err = cg2900_open(user);
+ if (err)
+ info->fm_audio = NULL;
+ return err;
+}
+
+/**
+ * cg2900_close() - Called when user wants to close an H4 channel.
+ * @user: MFD device to close.
+ *
+ * Clears up internal resources, sets channel as closed, and shuts down chip if
+ * this was the last user.
+ */
+static void cg2900_close(struct cg2900_user_data *user)
+{
+ bool keep_powered = false;
+ struct list_head *cursor, *next;
+ struct cg2900_channel_item *tmp;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV, "cg2900_close: Calling with NULL pointer\n");
+ return;
+ }
+
+ dev_dbg(user->dev, "cg2900_close\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ mutex_lock(&main_info->man_mutex);
+
+ /*
+ * Go through each open channel. Remove our channel and check if there
+ * is any other channel that want to keep the chip running
+ */
+ list_for_each_safe(cursor, next, &info->open_channels) {
+ tmp = list_entry(cursor, struct cg2900_channel_item, list);
+ if (tmp->user == user) {
+ list_del(cursor);
+ kfree(tmp);
+ } else if (!tmp->user->chip_independent)
+ keep_powered = true;
+ }
+
+ if (user->h4_channel == CHANNEL_BT_CMD && !bt_is_open(info))
+ last_bt_user_removed(info);
+ else if (user->h4_channel == CHANNEL_FM_RADIO && !fm_is_open(info))
+ last_fm_user_removed(info);
+
+ if (keep_powered)
+ /* This was not the last user, we're done. */
+ goto finished;
+
+ if (CG2900_IDLE == info->main_state)
+ /* Chip has already been shut down. */
+ goto finished;
+
+ dev_dbg(user->dev, "New main_state: CG2900_CLOSING\n");
+ info->main_state = CG2900_CLOSING;
+ chip_shutdown(user);
+
+ dev_dbg(user->dev, "Wait up to 15 seconds for chip to shut-down\n");
+ wait_event_interruptible_timeout(main_wait_queue,
+ (CG2900_IDLE == info->main_state),
+ msecs_to_jiffies(CHIP_SHUTDOWN_TIMEOUT));
+
+ /* Force shutdown if we timed out */
+ if (CG2900_IDLE != info->main_state) {
+ dev_err(user->dev,
+ "ST-Ericsson CG2900 Core Driver was shut-down with "
+ "problems\n");
+
+ if (dev->t_cb.close)
+ dev->t_cb.close(dev);
+
+ dev_dbg(user->dev, "New main_state: CG2900_IDLE\n");
+ info->main_state = CG2900_IDLE;
+ }
+
+finished:
+ mutex_unlock(&main_info->man_mutex);
+ user->opened = false;
+ dev_dbg(user->dev, "H:4 channel closed\n");
+}
+
+/**
+ * cg2900_hci_log_close() - Called when user wants to close HCI logger channel.
+ * @user: MFD device to close.
+ *
+ * Clears hci_logger user and calls @cg2900_close to close the channel.
+ */
+static void cg2900_hci_log_close(struct cg2900_user_data *user)
+{
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV,
+ "cg2900_hci_log_close: Calling with NULL pointer\n");
+ return;
+ }
+
+ dev_dbg(user->dev, "cg2900_hci_log_close\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ if (user != info->logger) {
+ dev_err(user->dev, "cg2900_hci_log_close: Trying to remove "
+ "another user\n");
+ return;
+ }
+
+ info->logger = NULL;
+ cg2900_close(user);
+}
+
+/**
+ * cg2900_bt_audio_close() - Called when user wants to close BT audio channel.
+ * @user: MFD device to close.
+ *
+ * Clears bt_audio user and calls @cg2900_close to close the channel.
+ */
+static void cg2900_bt_audio_close(struct cg2900_user_data *user)
+{
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV,
+ "cg2900_bt_audio_close: Calling with NULL pointer\n");
+ return;
+ }
+
+ dev_dbg(user->dev, "cg2900_bt_audio_close\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ if (user != info->bt_audio) {
+ dev_err(user->dev, "cg2900_bt_audio_close: Trying to remove "
+ "another user\n");
+ return;
+ }
+
+ info->bt_audio = NULL;
+ cg2900_close(user);
+}
+
+/**
+ * cg2900_fm_audio_close() - Called when user wants to close FM audio channel.
+ * @user: MFD device to close.
+ *
+ * Clears fm_audio user and calls @cg2900_close to close the channel.
+ */
+static void cg2900_fm_audio_close(struct cg2900_user_data *user)
+{
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV,
+ "cg2900_fm_audio_close: Calling with NULL pointer\n");
+ return;
+ }
+
+ dev_dbg(user->dev, "cg2900_fm_audio_close\n");
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ if (user != info->fm_audio) {
+ dev_err(user->dev, "cg2900_fm_audio_close: Trying to remove "
+ "another user\n");
+ return;
+ }
+
+ info->fm_audio = NULL;
+ cg2900_close(user);
+}
+
+/**
+ * cg2900_reset() - Called when user wants to reset the chip.
+ * @user: MFD device to reset.
+ *
+ * Closes down the chip and calls reset_cb for all open users.
+ *
+ * Returns:
+ * 0 if success.
+ * -EINVAL if user is NULL.
+ */
+static int cg2900_reset(struct cg2900_user_data *user)
+{
+ struct list_head *cursor, *next;
+ struct cg2900_channel_item *tmp;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ if (!user) {
+ dev_err(MAIN_DEV, "cg2900_reset: Calling with NULL pointer\n");
+ return -EINVAL;
+ }
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ dev_info(user->dev, "cg2900_reset\n");
+
+ BUG_ON(!main_info);
+
+ mutex_lock(&main_info->man_mutex);
+
+ dev_dbg(user->dev, "New main_state: CG2900_RESETING\n");
+ info->main_state = CG2900_RESETING;
+
+ chip_shutdown(user);
+
+ /*
+ * Inform all opened channels about the reset and free the user devices
+ */
+ list_for_each_safe(cursor, next, &info->open_channels) {
+ tmp = list_entry(cursor, struct cg2900_channel_item, list);
+ list_del(cursor);
+ tmp->user->opened = false;
+ tmp->user->reset_cb(tmp->user);
+ kfree(tmp);
+ }
+
+ /* Reset finished. We are now idle until first channel is opened */
+ dev_dbg(user->dev, "New main_state: CG2900_IDLE\n");
+ info->main_state = CG2900_IDLE;
+
+ mutex_unlock(&main_info->man_mutex);
+
+ /*
+ * Send wake-up since this might have been called from a failed boot.
+ * No harm done if it is a CG2900 chip user who called.
+ */
+ wake_up_interruptible_all(&main_wait_queue);
+
+ return 0;
+}
+
+/**
+ * cg2900_alloc_skb() - Allocates socket buffer.
+ * @size: Sk_buffer size in bytes.
+ * @priority: GFP priorit for allocation.
+ *
+ * Allocates a sk_buffer and reserves space for H4 header.
+ *
+ * Returns:
+ * sk_buffer if success.
+ * NULL if allocation fails.
+ */
+static struct sk_buff *cg2900_alloc_skb(unsigned int size, gfp_t priority)
+{
+ struct sk_buff *skb;
+
+ dev_dbg(MAIN_DEV, "cg2900_alloc_skb size %d bytes\n", size);
+
+ /* Allocate the SKB and reserve space for the header */
+ skb = alloc_skb(size + CG2900_SKB_RESERVE, priority);
+ if (skb)
+ skb_reserve(skb, CG2900_SKB_RESERVE);
+
+ return skb;
+}
+
+/**
+ * cg2900_write() - Called when user wants to write to the chip.
+ * @user: MFD device representing H4 channel to write to.
+ * @skb: Sk_buffer to transmit.
+ *
+ * Transmits the sk_buffer to the chip. If it is a BT cmd or FM audio packet it
+ * is checked that it is allowed to transmit the chip.
+ * Note that if error is returned it is up to the user to free the skb.
+ *
+ * Returns:
+ * 0 if success.
+ * -EINVAL if user or skb is NULL.
+ * -EACCES if channel is closed.
+ */
+static int cg2900_write(struct cg2900_user_data *user, struct sk_buff *skb)
+{
+ u8 *h4_header;
+ struct cg2900_chip_dev *dev;
+ struct cg2900_chip_info *info;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV, "cg2900_write: Calling with NULL pointer\n");
+ return -EINVAL;
+ }
+
+ if (!skb) {
+ dev_err(user->dev, "cg2900_write with no sk_buffer\n");
+ return -EINVAL;
+ }
+
+ dev = cg2900_get_prv(user);
+ info = dev->c_data;
+
+ dev_dbg(user->dev, "cg2900_write length %d bytes\n", skb->len);
+
+ if (!user->opened) {
+ dev_err(user->dev,
+ "Trying to transmit data on a closed channel\n");
+ return -EACCES;
+ }
+
+ /*
+ * Move the data pointer to the H:4 header position and
+ * store the H4 header.
+ */
+ h4_header = skb_push(skb, CG2900_SKB_RESERVE);
+ *h4_header = (u8)user->h4_channel;
+
+ if (user->h4_channel == CHANNEL_BT_CMD)
+ transmit_skb_with_flow_ctrl_bt(user, skb);
+ else if (user->h4_channel == CHANNEL_FM_RADIO)
+ transmit_skb_with_flow_ctrl_fm(user, skb);
+ else
+ cg2900_tx_to_chip(user, info->logger, skb);
+
+ return 0;
+}
+
+/**
+ * cg2900_no_write() - Used for channels where it is not allowed to write.
+ * @user: MFD device representing H4 channel to write to.
+ * @skb: Sk_buffer to transmit.
+ *
+ * Returns:
+ * -EPERM.
+ */
+static int cg2900_no_write(struct cg2900_user_data *user,
+ __attribute__((unused)) struct sk_buff *skb)
+{
+ dev_err(user->dev, "Not allowed to send on this channel\n");
+ return -EPERM;
+}
+
+/**
+ * cg2900_get_local_revision() - Called to retrieve revision data for the chip.
+ * @user: MFD device to check.
+ * @rev_data: Revision data to fill in.
+ *
+ * Returns:
+ * true if success.
+ * false upon failure.
+ */
+static bool cg2900_get_local_revision(struct cg2900_user_data *user,
+ struct cg2900_rev_data *rev_data)
+{
+ struct cg2900_chip_dev *dev;
+
+ BUG_ON(!main_info);
+
+ if (!user) {
+ dev_err(MAIN_DEV, "cg2900_get_local_revision: Calling with "
+ "NULL pointer\n");
+ return false;
+ }
+
+ if (!rev_data) {
+ dev_err(user->dev, "Calling with rev_data NULL\n");
+ return false;
+ }
+
+ dev = cg2900_get_prv(user);
+
+ rev_data->revision = dev->chip.hci_revision;
+ rev_data->sub_version = dev->chip.hci_sub_version;
+
+ return true;
+}
+
+static struct cg2900_user_data btcmd_data = {
+ .h4_channel = CHANNEL_BT_CMD,
+};
+static struct cg2900_user_data btacl_data = {
+ .h4_channel = CHANNEL_BT_ACL,
+};
+static struct cg2900_user_data btevt_data = {
+ .h4_channel = CHANNEL_BT_EVT,
+};
+static struct cg2900_user_data fm_data = {
+ .h4_channel = CHANNEL_FM_RADIO,
+};
+static struct cg2900_user_data gnss_data = {
+ .h4_channel = CHANNEL_GNSS,
+};
+static struct cg2900_user_data debug_data = {
+ .h4_channel = CHANNEL_DEBUG,
+};
+static struct cg2900_user_data ste_tools_data = {
+ .h4_channel = CHANNEL_STE_TOOLS,
+};
+static struct cg2900_user_data hci_logger_data = {
+ .h4_channel = CHANNEL_HCI_LOGGER,
+ .chip_independent = true,
+ .write = cg2900_no_write,
+ .open = cg2900_hci_log_open,
+ .close = cg2900_hci_log_close,
+};
+static struct cg2900_user_data core_data = {
+ .h4_channel = CHANNEL_CORE,
+ .write = cg2900_no_write,
+};
+static struct cg2900_user_data audio_bt_data = {
+ .h4_channel = CHANNEL_BT_CMD,
+ .is_audio = true,
+ .open = cg2900_bt_audio_open,
+ .close = cg2900_bt_audio_close,
+};
+static struct cg2900_user_data audio_fm_data = {
+ .h4_channel = CHANNEL_FM_RADIO,
+ .is_audio = true,
+ .open = cg2900_fm_audio_open,
+ .close = cg2900_fm_audio_close,
+};
+
+static struct mfd_cell cg2900_devs[] = {
+ {
+ .name = "cg2900-btcmd",
+ .platform_data = &btcmd_data,
+ .data_size = sizeof(btcmd_data),
+ },
+ {
+ .name = "cg2900-btacl",
+ .platform_data = &btacl_data,
+ .data_size = sizeof(btacl_data),
+ },
+ {
+ .name = "cg2900-btevt",
+ .platform_data = &btevt_data,
+ .data_size = sizeof(btevt_data),
+ },
+ {
+ .name = "cg2900-fm",
+ .platform_data = &fm_data,
+ .data_size = sizeof(fm_data),
+ },
+ {
+ .name = "cg2900-gnss",
+ .platform_data = &gnss_data,
+ .data_size = sizeof(gnss_data),
+ },
+ {
+ .name = "cg2900-debug",
+ .platform_data = &debug_data,
+ .data_size = sizeof(debug_data),
+ },
+ {
+ .name = "cg2900-stetools",
+ .platform_data = &ste_tools_data,
+ .data_size = sizeof(ste_tools_data),
+ },
+ {
+ .name = "cg2900-hcilogger",
+ .platform_data = &hci_logger_data,
+ .data_size = sizeof(hci_logger_data),
+ },
+ {
+ .name = "cg2900-core",
+ .platform_data = &core_data,
+ .data_size = sizeof(core_data),
+ },
+ {
+ .name = "cg2900-audiobt",
+ .platform_data = &audio_bt_data,
+ .data_size = sizeof(audio_bt_data),
+ },
+ {
+ .name = "cg2900-audiofm",
+ .platform_data = &audio_fm_data,
+ .data_size = sizeof(audio_fm_data),
+ },
+};
+
+static struct cg2900_user_data char_btcmd_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_BT_CMD,
+ },
+ .h4_channel = CHANNEL_BT_CMD,
+};
+static struct cg2900_user_data char_btacl_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_BT_ACL,
+ },
+ .h4_channel = CHANNEL_BT_ACL,
+};
+static struct cg2900_user_data char_btevt_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_BT_EVT,
+ },
+ .h4_channel = CHANNEL_BT_EVT,
+};
+static struct cg2900_user_data char_fm_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_FM_RADIO,
+ },
+ .h4_channel = CHANNEL_FM_RADIO,
+};
+static struct cg2900_user_data char_gnss_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_GNSS,
+ },
+ .h4_channel = CHANNEL_GNSS,
+};
+static struct cg2900_user_data char_debug_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_DEBUG,
+ },
+ .h4_channel = CHANNEL_DEBUG,
+};
+static struct cg2900_user_data char_ste_tools_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_STE_TOOLS,
+ },
+ .h4_channel = CHANNEL_STE_TOOLS,
+};
+static struct cg2900_user_data char_hci_logger_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_HCI_LOGGER,
+ },
+ .h4_channel = CHANNEL_HCI_LOGGER,
+ .chip_independent = true,
+ .write = cg2900_no_write,
+ .open = cg2900_hci_log_open,
+ .close = cg2900_hci_log_close,
+};
+static struct cg2900_user_data char_core_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_CORE,
+ },
+ .h4_channel = CHANNEL_CORE,
+ .write = cg2900_no_write,
+};
+static struct cg2900_user_data char_audio_bt_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_BT_AUDIO,
+ },
+ .h4_channel = CHANNEL_BT_CMD,
+ .is_audio = true,
+};
+static struct cg2900_user_data char_audio_fm_data = {
+ .channel_data = {
+ .char_dev_name = CG2900_FM_AUDIO,
+ },
+ .h4_channel = CHANNEL_FM_RADIO,
+ .is_audio = true,
+};
+
+static struct mfd_cell cg2900_char_devs[] = {
+ {
+ .name = "cg2900-chardev",
+ .id = 0,
+ .platform_data = &char_btcmd_data,
+ .data_size = sizeof(char_btcmd_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 1,
+ .platform_data = &char_btacl_data,
+ .data_size = sizeof(char_btacl_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 2,
+ .platform_data = &char_btevt_data,
+ .data_size = sizeof(char_btevt_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 3,
+ .platform_data = &char_fm_data,
+ .data_size = sizeof(char_fm_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 4,
+ .platform_data = &char_gnss_data,
+ .data_size = sizeof(char_gnss_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 5,
+ .platform_data = &char_debug_data,
+ .data_size = sizeof(char_debug_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 6,
+ .platform_data = &char_ste_tools_data,
+ .data_size = sizeof(char_ste_tools_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 7,
+ .platform_data = &char_hci_logger_data,
+ .data_size = sizeof(char_hci_logger_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 8,
+ .platform_data = &char_core_data,
+ .data_size = sizeof(char_core_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 9,
+ .platform_data = &char_audio_bt_data,
+ .data_size = sizeof(char_audio_bt_data),
+ },
+ {
+ .name = "cg2900-chardev",
+ .id = 10,
+ .platform_data = &char_audio_fm_data,
+ .data_size = sizeof(char_audio_fm_data),
+ },
+};
+
+/**
+ * set_plat_data() - Initializes data for an MFD cell.
+ * @cell: MFD cell.
+ * @dev: Current chip.
+ *
+ * Sets each callback to default function unless already set.
+ */
+static void set_plat_data(struct mfd_cell *cell, struct cg2900_chip_dev *dev)
+{
+ struct cg2900_user_data *pf_data = cell->platform_data;
+
+ if (!pf_data->open)
+ pf_data->open = cg2900_open;
+ if (!pf_data->close)
+ pf_data->close = cg2900_close;
+ if (!pf_data->reset)
+ pf_data->reset = cg2900_reset;
+ if (!pf_data->alloc_skb)
+ pf_data->alloc_skb = cg2900_alloc_skb;
+ if (!pf_data->write)
+ pf_data->write = cg2900_write;
+ if (!pf_data->get_local_revision)
+ pf_data->get_local_revision = cg2900_get_local_revision;
+
+ cg2900_set_prv(pf_data, dev);
+}
+
+/**
+ * check_chip_support() - Checks if connected chip is handled by this driver.
+ * @dev: Chip info structure.
+ *
+ * First check if chip is supported by this driver. If that is the case fill in
+ * the callbacks in @dev and initiate internal variables. Finally create MFD
+ * devices for all supported H4 channels. When finished power off the chip.
+ *
+ * Returns:
+ * true if chip is handled by this driver.
+ * false otherwise.
+ */
+static bool check_chip_support(struct cg2900_chip_dev *dev)
+{
+ struct cg2900_platform_data *pf_data;
+ struct cg2900_chip_info *info;
+ int i;
+ int err;
+
+ dev_dbg(dev->dev, "check_chip_support\n");
+
+ /*
+ * Check if this is a CG2900 revision.
+ * We do not care about the sub-version at the moment. Change this if
+ * necessary.
+ */
+ if ((dev->chip.manufacturer != CG2900_SUPP_MANUFACTURER) ||
+ (dev->chip.hci_revision != CG2900_PG1_SPECIAL_REV &&
+ (dev->chip.hci_revision < CG2900_SUPP_REVISION_MIN ||
+ dev->chip.hci_revision > CG2900_SUPP_REVISION_MAX))) {
+ dev_dbg(dev->dev, "Chip not supported by CG2900 driver\n"
+ "\tMan: 0x%02X\n"
+ "\tRev: 0x%04X\n"
+ "\tSub: 0x%04X\n",
+ dev->chip.manufacturer, dev->chip.hci_revision,
+ dev->chip.hci_sub_version);
+ return false;
+ }
+
+ /* Store needed data */
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ dev_err(dev->dev, "Couldn't allocate info struct\n");
+ return false;
+ }
+
+ /* Initialize all variables */
+ skb_queue_head_init(&info->tx_queue_bt);
+ skb_queue_head_init(&info->tx_queue_fm);
+
+ INIT_LIST_HEAD(&info->open_channels);
+
+ spin_lock_init(&info->tx_bt_lock);
+ spin_lock_init(&info->tx_fm_lock);
+ spin_lock_init(&info->rw_lock);
+
+ info->tx_nr_pkts_allowed_bt = 1;
+ info->audio_bt_cmd_op = CG2900_BT_OPCODE_NONE;
+ info->audio_fm_cmd_id = CG2900_FM_CMD_NONE;
+ info->hci_fm_cmd_func = CG2900_FM_CMD_PARAM_NONE;
+ info->fm_radio_mode = FM_RADIO_MODE_IDLE;
+ info->chip_dev = dev;
+ info->dev = dev->dev;
+
+ info->wq = create_singlethread_workqueue(WQ_NAME);
+ if (!info->wq) {
+ dev_err(dev->dev, "Could not create workqueue\n");
+ goto err_handling_free_info;
+ }
+
+ info->patch_file_name = kzalloc(NAME_MAX + 1, GFP_ATOMIC);
+ if (!info->patch_file_name) {
+ dev_err(dev->dev,
+ "Couldn't allocate name buffer for patch file\n");
+ goto err_handling_destroy_wq;
+ }
+
+ info->settings_file_name = kzalloc(NAME_MAX + 1, GFP_ATOMIC);
+ if (!info->settings_file_name) {
+ dev_err(dev->dev,
+ "Couldn't allocate name buffers settings file\n");
+ goto err_handling_free_patch_name;
+ }
+
+ dev->c_data = info;
+ /* Set the callbacks */
+ dev->c_cb.data_from_chip = data_from_chip;
+ dev->c_cb.chip_removed = chip_removed;
+
+ mutex_lock(&main_info->man_mutex);
+
+ pf_data = dev_get_platdata(dev->dev);
+ btcmd_data.channel_data.bt_bus = pf_data->bus;
+ btacl_data.channel_data.bt_bus = pf_data->bus;
+ btevt_data.channel_data.bt_bus = pf_data->bus;
+
+ for (i = 0; i < ARRAY_SIZE(cg2900_devs); i++)
+ set_plat_data(&cg2900_devs[i], dev);
+ for (i = 0; i < ARRAY_SIZE(cg2900_char_devs); i++)
+ set_plat_data(&cg2900_char_devs[i], dev);
+
+ err = mfd_add_devices(dev->dev, main_info->cell_base_id, cg2900_devs,
+ ARRAY_SIZE(cg2900_devs), NULL, 0);
+ if (err) {
+ dev_err(dev->dev, "Failed to add cg2900_devs (%d)\n", err);
+ goto err_handling_free_settings_name;
+ }
+
+ err = mfd_add_devices(dev->dev, main_info->cell_base_id,
+ cg2900_char_devs, ARRAY_SIZE(cg2900_char_devs),
+ NULL, 0);
+ if (err) {
+ dev_err(dev->dev, "Failed to add cg2900_char_devs (%d)\n", err);
+ goto err_handling_remove_devs;
+ }
+
+ main_info->cell_base_id += 30;
+ mutex_unlock(&main_info->man_mutex);
+
+ dev_info(dev->dev, "Chip supported by the CG2900 chip driver\n");
+
+ /* Finish by turning off the chip */
+ cg2900_create_work_item(info->wq, work_power_off_chip, dev);
+
+ return true;
+
+err_handling_remove_devs:
+ mfd_remove_devices(dev->dev);
+err_handling_free_settings_name:
+ kfree(info->settings_file_name);
+ mutex_unlock(&main_info->man_mutex);
+err_handling_free_patch_name:
+ kfree(info->patch_file_name);
+err_handling_destroy_wq:
+ destroy_workqueue(info->wq);
+err_handling_free_info:
+ kfree(info);
+ return false;
+}
+
+static struct cg2900_id_callbacks chip_support_callbacks = {
+ .check_chip_support = check_chip_support,
+};
+
+/**
+ * cg2900_chip_probe() - Initialize CG2900 chip handler resources.
+ * @pdev: Platform device.
+ *
+ * This function initializes the CG2900 driver, then registers to
+ * the CG2900 Core.
+ *
+ * Returns:
+ * 0 if success.
+ * -ENOMEM for failed alloc or structure creation.
+ * Error codes generated by cg2900_register_chip_driver.
+ */
+static int __devinit cg2900_chip_probe(struct platform_device *pdev)
+{
+ int err;
+
+ dev_dbg(&pdev->dev, "cg2900_chip_probe\n");
+
+ main_info = kzalloc(sizeof(*main_info), GFP_ATOMIC);
+ if (!main_info) {
+ dev_err(&pdev->dev, "Couldn't allocate main_info\n");
+ return -ENOMEM;
+ }
+
+ main_info->dev = &pdev->dev;
+ mutex_init(&main_info->man_mutex);
+
+ err = cg2900_register_chip_driver(&chip_support_callbacks);
+ if (err) {
+ dev_err(&pdev->dev,
+ "Couldn't register chip driver (%d)\n", err);
+ goto error_handling;
+ }
+
+ dev_info(&pdev->dev, "CG2900 chip driver started\n");
+
+ return 0;
+
+error_handling:
+ mutex_destroy(&main_info->man_mutex);
+ kfree(main_info);
+ main_info = NULL;
+ return err;
+}
+
+/**
+ * cg2900_chip_remove() - Release CG2900 chip handler resources.
+ * @pdev: Platform device.
+ *
+ * Returns:
+ * 0 if success (always success).
+ */
+static int __devexit cg2900_chip_remove(struct platform_device *pdev)
+{
+ dev_info(&pdev->dev, "CG2900 chip driver removed\n");
+
+ cg2900_deregister_chip_driver(&chip_support_callbacks);
+
+ if (!main_info)
+ return 0;
+ mutex_destroy(&main_info->man_mutex);
+ kfree(main_info);
+ main_info = NULL;
+ return 0;
+}
+
+static struct platform_driver cg2900_chip_driver = {
+ .driver = {
+ .name = "cg2900-chip",
+ .owner = THIS_MODULE,
+ },
+ .probe = cg2900_chip_probe,
+ .remove = __devexit_p(cg2900_chip_remove),
+};
+
+/**
+ * cg2900_chip_init() - Initialize module.
+ *
+ * Registers platform driver.
+ */
+static int __init cg2900_chip_init(void)
+{
+ pr_debug("cg2900_chip_init");
+ return platform_driver_register(&cg2900_chip_driver);
+}
+
+/**
+ * cg2900_chip_exit() - Remove module.
+ *
+ * Unregisters platform driver.
+ */
+static void __exit cg2900_chip_exit(void)
+{
+ pr_debug("cg2900_chip_exit");
+ platform_driver_unregister(&cg2900_chip_driver);
+}
+
+module_init(cg2900_chip_init);
+module_exit(cg2900_chip_exit);
+
+MODULE_AUTHOR("Par-Gunnar Hjalmdahl ST-Ericsson");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Linux CG2900 Connectivity Device Driver");
diff --git a/drivers/mfd/cg2900/cg2900_chip.h b/drivers/mfd/cg2900/cg2900_chip.h
new file mode 100644
index 0000000..cb05b3f
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_chip.h
@@ -0,0 +1,602 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson CG2900 GPS/BT/FM controller.
+ */
+
+#ifndef _CG2900_CHIP_H_
+#define _CG2900_CHIP_H_
+
+/*
+ * Utility
+ */
+
+static inline void set_low_nibble(__u8 *var, __u8 value)
+{
+ *var = (*var & 0xf0) | (value & 0x0f);
+}
+
+static inline void set_high_nibble(__u8 *var, __u8 value)
+{
+ *var = (*var & 0x0f) | (value << 4);
+}
+
+static inline void store_bit(__u8 *var, size_t bit, __u8 value)
+{
+ *var = (*var & ~(1u << bit)) | (value << bit);
+}
+
+/*
+ * General chip defines
+ */
+
+/* Supported chips */
+#define CG2900_SUPP_MANUFACTURER 0x30
+#define CG2900_SUPP_REVISION_MIN 0x0100
+#define CG2900_SUPP_REVISION_MAX 0x0200
+
+/* Specific chip version data */
+#define CG2900_PG1_REV 0x0101
+#define CG2900_PG2_REV 0x0200
+#define CG2900_PG1_SPECIAL_REV 0x0700
+
+/*
+ * Bluetooth
+ */
+
+#define BT_SIZE_OF_HDR (sizeof(__le16) + sizeof(__u8))
+#define BT_PARAM_LEN(__pkt_len) (__pkt_len - BT_SIZE_OF_HDR)
+
+struct bt_cmd_cmpl_event {
+ __u8 eventcode;
+ __u8 plen;
+ __u8 n_commands;
+ __le16 opcode;
+ /*
+ * According to BT-specification what follows is "parameters"
+ * and unique to every command, but all commands start the
+ * parameters with the status field so include it here for
+ * convenience
+ */
+ __u8 status;
+ __u8 data[];
+} __attribute__((packed));
+
+/* BT VS Store In FS command */
+#define CG2900_BT_OP_VS_STORE_IN_FS 0xFC22
+struct bt_vs_store_in_fs_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 user_id;
+ __u8 len;
+ __u8 data[];
+} __attribute__((packed));
+
+#define CG2900_VS_STORE_IN_FS_USR_ID_BD_ADDR 0xFE
+
+/* BT VS Write File Block command */
+#define CG2900_BT_OP_VS_WRITE_FILE_BLOCK 0xFC2E
+struct bt_vs_write_file_block_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 id;
+ __u8 data[];
+} __attribute__((packed));
+
+#define CG2900_BT_DISABLE 0x00
+#define CG2900_BT_ENABLE 0x01
+
+/* BT VS BT Enable command */
+#define CG2900_BT_OP_VS_BT_ENABLE 0xFF10
+struct bt_vs_bt_enable_cmd {
+ __le16 op_code;
+ u8 plen;
+ u8 enable;
+} __attribute__((packed));
+
+/* Bytes in the command Hci_Cmd_ST_Set_Uart_Baud_Rate */
+#define CG2900_BAUD_RATE_57600 0x03
+#define CG2900_BAUD_RATE_115200 0x02
+#define CG2900_BAUD_RATE_230400 0x01
+#define CG2900_BAUD_RATE_460800 0x00
+#define CG2900_BAUD_RATE_921600 0x20
+#define CG2900_BAUD_RATE_2000000 0x25
+#define CG2900_BAUD_RATE_3000000 0x27
+#define CG2900_BAUD_RATE_4000000 0x2B
+
+/* BT VS SetBaudRate command */
+#define CG2900_BT_OP_VS_SET_BAUD_RATE 0xFC09
+struct bt_vs_set_baud_rate_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 baud_rate;
+} __attribute__((packed));
+
+/* Bluetooth Vendor Specific Opcodes */
+#define CG2900_BT_OP_VS_POWER_SWITCH_OFF 0xFD40
+#define CG2900_BT_OP_VS_SYSTEM_RESET 0xFF12
+
+#define CG2900_BT_OPCODE_NONE 0xFFFF
+
+/*
+ * Common multimedia
+ */
+
+#define CG2900_CODEC_TYPE_NONE 0x00
+#define CG2900_CODEC_TYPE_SBC 0x01
+
+#define CG2900_PCM_MODE_SLAVE 0x00
+#define CG2900_PCM_MODE_MASTER 0x01
+
+#define CG2900_I2S_MODE_MASTER 0x00
+#define CG2900_I2S_MODE_SLAVE 0x01
+
+/*
+ * CG2900 PG1 multimedia API
+ */
+
+#define CG2900_BT_VP_TYPE_PCM 0x00
+#define CG2900_BT_VP_TYPE_I2S 0x01
+#define CG2900_BT_VP_TYPE_SLIMBUS 0x02
+#define CG2900_BT_VP_TYPE_FM 0x03
+#define CG2900_BT_VP_TYPE_BT_SCO 0x04
+#define CG2900_BT_VP_TYPE_BT_A2DP 0x05
+#define CG2900_BT_VP_TYPE_ANALOG 0x07
+
+#define CG2900_BT_VS_SET_HARDWARE_CONFIG 0xFD54
+/* These don't have the same length, so a union won't work */
+struct bt_vs_set_hw_cfg_cmd_pcm {
+ __le16 opcode;
+ __u8 plen;
+ __u8 vp_type;
+ __u8 port_id;
+ __u8 mode_dir; /* NB: mode is in bit 1 (not 0) */
+ __u8 bit_clock;
+ __le16 frame_len;
+} __attribute__((packed));
+#define HWCONFIG_PCM_SET_MODE(pcfg, mode) \
+ set_low_nibble(&(pcfg)->mode_dir, (mode) << 1)
+#define HWCONFIG_PCM_SET_DIR(pcfg, idx, dir) \
+ store_bit(&(pcfg)->mode_dir, (idx) + 4, (dir))
+
+struct bt_vs_set_hw_cfg_cmd_i2s {
+ __le16 opcode;
+ __u8 plen;
+ __u8 vp_type;
+ __u8 port_id;
+ __u8 half_period;
+ __u8 master_slave;
+} __attribute__((packed));
+
+/* Max length for allocating */
+#define CG2900_BT_LEN_VS_SET_HARDWARE_CONFIG \
+ (sizeof(struct bt_vs_set_hw_cfg_cmd_pcm))
+
+#define CG2900_BT_VS_SET_SESSION_CONFIG 0xFD55
+struct session_config_vport {
+ __u8 type;
+ union {
+ struct {
+ __le16 acl_handle;
+ __u8 reserved[10];
+ } sco;
+ struct {
+ __u8 reserved[12];
+ } fm;
+ struct {
+ __u8 index;
+ __u8 slots_used;
+ __u8 slot_start[4];
+ __u8 reserved[6];
+ } pcm;
+ struct {
+ __u8 index;
+ __u8 channel;
+ __u8 reserved[10];
+ } i2s;
+ };
+} __attribute__((packed));
+#define SESSIONCFG_PCM_SET_USED(port, idx, use) \
+ store_bit(&(port).pcm.slots_used, (idx), (use))
+
+struct session_config_stream {
+ __u8 media_type;
+ __u8 csel_srate;
+ __u8 codec_type;
+ __u8 codec_mode;
+ __u8 codec_params[3];
+ struct session_config_vport inport;
+ struct session_config_vport outport;
+} __attribute__((packed));
+#define SESSIONCFG_SET_CHANNELS(pcfg, chnl) \
+ set_low_nibble(&(pcfg)->csel_srate, (chnl))
+#define SESSIONCFG_I2S_SET_SRATE(pcfg, rate) \
+ set_high_nibble(&(pcfg)->csel_srate, (rate))
+
+struct bt_vs_session_config_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 n_streams; /* we only support one here */
+ struct session_config_stream stream;
+} __attribute__((packed));
+
+#define CG2900_BT_SESSION_MEDIA_TYPE_AUDIO 0x00
+
+#define CG2900_BT_SESSION_RATE_8K 0x01
+#define CG2900_BT_SESSION_RATE_16K 0x02
+#define CG2900_BT_SESSION_RATE_44_1K 0x04
+#define CG2900_BT_SESSION_RATE_48K 0x05
+
+#define CG2900_BT_MEDIA_CONFIG_MONO 0x00
+#define CG2900_BT_MEDIA_CONFIG_STEREO 0x01
+#define CG2900_BT_MEDIA_CONFIG_JOINT_STEREO 0x02
+#define CG2900_BT_MEDIA_CONFIG_DUAL_CHANNEL 0x03
+
+#define CG2900_BT_SESSION_I2S_INDEX_I2S 0x00
+#define CG2900_BT_SESSION_PCM_INDEX_PCM_I2S 0x00
+
+
+#define CG2900_BT_VS_SESSION_CTRL 0xFD57
+struct bt_vs_session_ctrl_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 id;
+ __u8 control;
+} __attribute__((packed));
+
+#define CG2900_BT_SESSION_START 0x00
+#define CG2900_BT_SESSION_STOP 0x01
+#define CG2900_BT_SESSION_PAUSE 0x02
+#define CG2900_BT_SESSION_RESUME 0x03
+
+#define CG2900_BT_VS_RESET_SESSION_CONFIG 0xFD56
+struct bt_vs_reset_session_cfg_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 id;
+} __attribute__((packed));
+
+/*
+ * CG2900 PG2 multimedia API
+ */
+
+#define CG2900_MC_PORT_PCM_I2S 0x00
+#define CG2900_MC_PORT_I2S 0x01
+#define CG2900_MC_PORT_BT_SCO 0x04
+#define CG2900_MC_PORT_FM_RX_0 0x07
+#define CG2900_MC_PORT_FM_RX_1 0x08
+#define CG2900_MC_PORT_FM_TX 0x09
+
+#define CG2900_MC_VS_PORT_CONFIG 0xFD64
+struct mc_vs_port_cfg_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 type;
+ /*
+ * one of the following configuration structs should follow, but they
+ * have different lengths so a union will not work
+ */
+} __attribute__((packed));
+
+struct mc_vs_port_cfg_pcm_i2s {
+ __u8 role_dir;
+ __u8 sco_a2dp_slots_used;
+ __u8 fm_slots_used;
+ __u8 ring_slots_used;
+ __u8 slot_start[4];
+ __u8 ratio_mode;
+ __u8 frame_len;
+ __u8 bitclk_srate;
+} __attribute__((packed));
+#define PORTCFG_PCM_SET_ROLE(cfg, role) \
+ set_low_nibble(&(cfg).role_dir, (role))
+#define PORTCFG_PCM_SET_DIR(cfg, idx, dir) \
+ store_bit(&(cfg).role_dir, (idx) + 4, (dir))
+static inline void portcfg_pcm_set_sco_used(struct mc_vs_port_cfg_pcm_i2s *cfg,
+ size_t index, __u8 use)
+{
+ if (use) {
+ /* clear corresponding slot in all cases */
+ cfg->sco_a2dp_slots_used &= ~(0x11 << index);
+ cfg->fm_slots_used &= ~(0x11 << index);
+ cfg->ring_slots_used &= ~(0x11 << index);
+ /* set for sco */
+ cfg->sco_a2dp_slots_used |= (1u << index);
+ } else {
+ /* only clear for sco */
+ cfg->sco_a2dp_slots_used &= ~(1u << index);
+ }
+}
+#define PORTCFG_PCM_SET_SCO_USED(cfg, idx, use) \
+ portcfg_pcm_set_sco_used(&cfg, idx, use)
+#define PORTCFG_PCM_SET_RATIO(cfg, r) \
+ set_low_nibble(&(cfg).ratio_mode, (r))
+#define PORTCFG_PCM_SET_MODE(cfg, mode) \
+ set_high_nibble(&(cfg).ratio_mode, (mode))
+#define PORTCFG_PCM_SET_BITCLK(cfg, clk) \
+ set_low_nibble(&(cfg).bitclk_srate, (clk))
+#define PORTCFG_PCM_SET_SRATE(cfg, rate) \
+ set_high_nibble(&(cfg).bitclk_srate, (rate))
+
+#define CG2900_MC_PCM_SAMPLE_RATE_8 1
+#define CG2900_MC_PCM_SAMPLE_RATE_16 2
+#define CG2900_MC_PCM_SAMPLE_RATE_44_1 4
+#define CG2900_MC_PCM_SAMPLE_RATE_48 6
+
+struct mc_vs_port_cfg_i2s {
+ __u8 role_hper;
+ __u8 csel_srate;
+ __u8 wordlen;
+};
+#define PORTCFG_I2S_SET_ROLE(cfg, role) \
+ set_low_nibble(&(cfg).role_hper, (role))
+#define PORTCFG_I2S_SET_HALFPERIOD(cfg, hper) \
+ set_high_nibble(&(cfg).role_hper, (hper))
+#define PORTCFG_I2S_SET_CHANNELS(cfg, chnl) \
+ set_low_nibble(&(cfg).csel_srate, (chnl))
+#define PORTCFG_I2S_SET_SRATE(cfg, rate) \
+ set_high_nibble(&(cfg).csel_srate, (rate))
+#define PORTCFG_I2S_SET_WORDLEN(cfg, len) \
+ set_low_nibble(&(cfg).wordlen, len)
+
+#define CG2900_MC_I2S_RIGHT_CHANNEL 1
+#define CG2900_MC_I2S_LEFT_CHANNEL 2
+#define CG2900_MC_I2S_BOTH_CHANNELS 3
+
+#define CG2900_MC_I2S_SAMPLE_RATE_8 0
+#define CG2900_MC_I2S_SAMPLE_RATE_16 1
+#define CG2900_MC_I2S_SAMPLE_RATE_44_1 2
+#define CG2900_MC_I2S_SAMPLE_RATE_48 4
+
+#define CG2900_MC_I2S_WORD_16 1
+#define CG2900_MC_I2S_WORD_32 3
+
+struct mc_vs_port_cfg_fm {
+ __u8 srate; /* NB: value goes in _upper_ nibble! */
+};
+#define PORTCFG_FM_SET_SRATE(cfg, rate) \
+ set_high_nibble(&(cfg).srate, (rate))
+
+struct mc_vs_port_cfg_sco {
+ __le16 acl_id;
+ __u8 wbs_codec;
+ __u8 sbc_params[3]; /* replace when we actually enable WBS... */
+} __attribute__((packed));
+#define PORTCFG_SCO_SET_WBS(cfg, wbs) \
+ set_low_nibble(&(cfg).wbs_codec, (wbs))
+#define PORTCFG_SCO_SET_CODEC(cfg, codec) \
+ set_high_nibble(&(cfg).wbs_codec, (codec))
+
+#define CG2900_MC_VS_CREATE_STREAM 0xFD66
+struct mc_vs_create_stream_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 id;
+ __u8 inport;
+ __u8 outport;
+ __u8 order; /* NB: not used by chip */
+} __attribute__((packed));
+
+#define CG2900_MC_VS_DELETE_STREAM 0xFD67
+struct mc_vs_delete_stream_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 stream;
+} __attribute__((packed));
+
+#define CG2900_MC_VS_STREAM_CONTROL 0xFD68
+struct mc_vs_stream_ctrl_cmd {
+ __le16 opcode;
+ __u8 plen;
+ __u8 command;
+ __u8 n_streams;
+ __u8 stream[];
+} __attribute__((packed));
+
+#define CG2900_MC_STREAM_START 0x00
+#define CG2900_MC_STREAM_STOP 0x01
+#define CG2900_MC_STREAM_STOP_FLUSH 0x02
+
+#define CG2900_MC_VS_SET_FM_START_MODE 0xFD69
+
+/*
+ * FM
+ */
+
+/* FM legacy command packet */
+struct fm_leg_cmd {
+ __u8 length;
+ __u8 opcode;
+ __u8 read_write;
+ __u8 fm_function;
+ union { /* Payload varies with function */
+ __le16 irqmask;
+ struct fm_leg_fm_cmd {
+ __le16 head;
+ __le16 data[];
+ } fm_cmd;
+ };
+} __attribute__((packed));
+
+/* FM legacy command complete packet */
+struct fm_leg_cmd_cmpl {
+ __u8 param_length;
+ __u8 status;
+ __u8 opcode;
+ __u8 read_write;
+ __u8 cmd_status;
+ __u8 fm_function;
+ __le16 response_head;
+ __le16 data[];
+} __attribute__((packed));
+
+/* FM legacy interrupt packet, PG2 style */
+struct fm_leg_irq_v2 {
+ __u8 param_length;
+ __u8 status;
+ __u8 opcode;
+ __u8 event_type;
+ __u8 event_id;
+ __le16 irq;
+} __attribute__((packed));
+
+/* FM legacy interrupt packet, PG1 style */
+struct fm_leg_irq_v1 {
+ __u8 param_length;
+ __u8 opcode;
+ __u8 event_id;
+ __le16 irq;
+} __attribute__((packed));
+
+union fm_leg_evt_or_irq {
+ __u8 param_length;
+ struct fm_leg_cmd_cmpl evt;
+ struct fm_leg_irq_v2 irq_v2;
+ struct fm_leg_irq_v1 irq_v1;
+} __attribute__((packed));
+
+/* FM Opcode generic*/
+#define CG2900_FM_GEN_ID_LEGACY 0xFE
+
+/* FM event*/
+#define CG2900_FM_EVENT_UNKNOWN 0
+#define CG2900_FM_EVENT_CMD_COMPLETE 1
+#define CG2900_FM_EVENT_INTERRUPT 2
+
+/* FM do-command identifiers. */
+#define CG2900_FM_DO_AIP_FADE_START 0x0046
+#define CG2900_FM_DO_AUP_BT_FADE_START 0x01C2
+#define CG2900_FM_DO_AUP_EXT_FADE_START 0x0102
+#define CG2900_FM_DO_AUP_FADE_START 0x00A2
+#define CG2900_FM_DO_FMR_SETANTENNA 0x0663
+#define CG2900_FM_DO_FMR_SP_AFSWITCH_START 0x04A3
+#define CG2900_FM_DO_FMR_SP_AFUPDATE_START 0x0463
+#define CG2900_FM_DO_FMR_SP_BLOCKSCAN_START 0x0683
+#define CG2900_FM_DO_FMR_SP_PRESETPI_START 0x0443
+#define CG2900_FM_DO_FMR_SP_SCAN_START 0x0403
+#define CG2900_FM_DO_FMR_SP_SEARCH_START 0x03E3
+#define CG2900_FM_DO_FMR_SP_SEARCHPI_START 0x0703
+#define CG2900_FM_DO_FMR_SP_TUNE_SETCHANNEL 0x03C3
+#define CG2900_FM_DO_FMR_SP_TUNE_STEPCHANNEL 0x04C3
+#define CG2900_FM_DO_FMT_PA_SETCTRL 0x01A4
+#define CG2900_FM_DO_FMT_PA_SETMODE 0x01E4
+#define CG2900_FM_DO_FMT_SP_TUNE_SETCHANNEL 0x0064
+#define CG2900_FM_DO_GEN_ANTENNACHECK_START 0x02A1
+#define CG2900_FM_DO_GEN_GOTOMODE 0x0041
+#define CG2900_FM_DO_GEN_POWERSUPPLY_SETMODE 0x0221
+#define CG2900_FM_DO_GEN_SELECTREFERENCECLOCK 0x0201
+#define CG2900_FM_DO_GEN_SETPROCESSINGCLOCK 0x0241
+#define CG2900_FM_DO_GEN_SETREFERENCECLOCKPLL 0x01A1
+#define CG2900_FM_DO_TST_TX_RAMP_START 0x0147
+#define CG2900_FM_CMD_NONE 0xFFFF
+#define CG2900_FM_CMD_ID_GEN_GOTO_POWER_DOWN 0x0081
+#define CG2900_FM_CMD_ID_GEN_GOTO_STANDBY 0x0061
+
+/* FM Command IDs */
+#define CG2900_FM_CMD_ID_AUP_EXT_SET_MODE 0x0162
+#define CG2900_FM_CMD_ID_AUP_EXT_SET_CTRL 0x0182
+#define CG2900_FM_CMD_ID_AIP_SET_MODE 0x01C6
+#define CG2900_FM_CMD_ID_AIP_BT_SET_CTRL 0x01A6
+#define CG2900_FM_CMD_ID_AIP_BT_SET_MODE 0x01E6
+
+/* FM Command Parameters. */
+#define CG2900_FM_CMD_PARAM_ENABLE 0x00
+#define CG2900_FM_CMD_PARAM_DISABLE 0x01
+#define CG2900_FM_CMD_PARAM_RESET 0x02
+#define CG2900_FM_CMD_PARAM_WRITECOMMAND 0x10
+#define CG2900_FM_CMD_PARAM_SET_INT_MASK_ALL 0x20
+#define CG2900_FM_CMD_PARAM_GET_INT_MASK_ALL 0x21
+#define CG2900_FM_CMD_PARAM_SET_INT_MASK 0x22
+#define CG2900_FM_CMD_PARAM_GET_INT_MASK 0x23
+#define CG2900_FM_CMD_PARAM_FM_FW_DOWNLOAD 0x30
+#define CG2900_FM_CMD_PARAM_NONE 0xFF
+
+/* FM Legacy Command Parameters */
+#define CG2900_FM_CMD_LEG_PARAM_WRITE 0x00
+#define CG2900_FM_CMD_LEG_PARAM_IRQ 0x01
+
+/* FM Command Status. */
+#define CG2900_FM_CMD_STATUS_COMMAND_SUCCEEDED 0x00
+#define CG2900_FM_CMD_STATUS_HW_FAILURE 0x03
+#define CG2900_FM_CMD_STATUS_INVALID_PARAMS 0x12
+#define CG2900_FM_CMD_STATUS_UNINITILIZED 0x15
+#define CG2900_FM_CMD_STATUS_UNSPECIFIED_ERROR 0x1F
+#define CG2900_FM_CMD_STATUS_COMMAND_DISALLOWED 0x0C
+#define CG2900_FM_CMD_STATUS_FW_WRONG_SEQUENCE_NR 0xF1
+#define CG2900_FM_CMD_STATUS_FW_UNKNOWN_FILE 0xF2
+#define CG2900_FM_CMD_STATUS_FW_FILE_VER_MISMATCH 0xF3
+
+/* FM Interrupts. */
+#define CG2900_FM_IRPT_FIQ 0x0000
+#define CG2900_FM_IRPT_OPERATION_SUCCEEDED 0x0001
+#define CG2900_FM_IRPT_OPERATION_FAILED 0x0002
+#define CG2900_FM_IRPT_BUFFER_FULL 0x0008
+#define CG2900_FM_IRPT_BUFFER_EMPTY 0x0008
+#define CG2900_FM_IRPT_SIGNAL_QUALITY_LOW 0x0010
+#define CG2900_FM_IRPT_MUTE_STATUS_CHANGED 0x0010
+#define CG2900_FM_IRPT_MONO_STEREO_TRANSITION 0x0020
+#define CG2900_FM_IRPT_OVER_MODULATION 0x0020
+#define CG2900_FM_IRPT_RDS_SYNC_FOUND 0x0040
+#define CG2900_FM_IRPT_INPUT_OVERDRIVE 0x0040
+#define CG2900_FM_IRPT_RDS_SYNC_LOST 0x0080
+#define CG2900_FM_IRPT_PI_CODE_CHANGED 0x0100
+#define CG2900_FM_IRPT_REQUEST_BLOCK_AVALIBLE 0x0200
+#define CG2900_FM_IRPT_BUFFER_CLEARED 0x2000
+#define CG2900_FM_IRPT_WARM_BOOT_READY 0x4000
+#define CG2900_FM_IRPT_COLD_BOOT_READY 0x8000
+
+/* FM Legacy Function Command Parameters */
+
+/* AUP_EXT_SetMode Output enum */
+#define CG2900_FM_CMD_AUP_EXT_SET_MODE_DISABLED 0x0000
+#define CG2900_FM_CMD_AUP_EXT_SET_MODE_I2S 0x0001
+#define CG2900_FM_CMD_AUP_EXT_SET_MODE_PARALLEL 0x0002
+
+/* SetControl Conversion enum */
+#define CG2900_FM_CMD_SET_CTRL_CONV_UP 0x0000
+#define CG2900_FM_CMD_SET_CTRL_CONV_DOWN 0x0001
+
+/* AIP_SetMode Input enum */
+#define CG2900_FM_CMD_AIP_SET_MODE_INPUT_ANA 0x0000
+#define CG2900_FM_CMD_AIP_SET_MODE_INPUT_DIG 0x0001
+
+/* AIP_BT_SetMode Input enum */
+#define CG2900_FM_CMD_AIP_BT_SET_MODE_INPUT_RESERVED 0x0000
+#define CG2900_FM_CMD_AIP_BT_SET_MODE_INPUT_I2S 0x0001
+#define CG2900_FM_CMD_AIP_BT_SET_MODE_INPUT_PAR 0x0002
+#define CG2900_FM_CMD_AIP_BT_SET_MODE_INPUT_FIFO 0x0003
+
+/* FM Parameter Lengths = FM command length - length field (1 byte) */
+#define CG2900_FM_CMD_PARAM_LEN(len) (len - 1)
+
+/*
+ * FM Command ID mapped per byte and shifted 3 bits left
+ * Also adds number of parameters at first 3 bits of LSB.
+ */
+static inline __u16 cg2900_get_fm_cmd_id(__u16 opcode)
+{
+ return opcode >> 3;
+}
+
+static inline __u16 cg2900_make_fm_cmd_id(__u16 id, __u8 num_params)
+{
+ return (id << 3) | num_params;
+}
+
+/*
+ * GNSS
+ */
+
+struct gnss_hci_hdr {
+ __u8 op_code;
+ __le16 plen;
+} __attribute__((packed));
+
+#endif /* _CG2900_CHIP_H_ */
diff --git a/drivers/mfd/cg2900/cg2900_lib.c b/drivers/mfd/cg2900/cg2900_lib.c
new file mode 100644
index 0000000..a1148b5
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_lib.c
@@ -0,0 +1,391 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson CG2900 GPS/BT/FM controller.
+ */
+#define NAME "cg2900_lib"
+#define pr_fmt(fmt) NAME ": " fmt "\n"
+
+#include <linux/kernel.h>
+#include <linux/limits.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <linux/mfd/cg2900.h>
+
+#include "cg2900_chip.h"
+#include "cg2900_core.h"
+#include "cg2900_lib.h"
+
+/*
+ * Max length in bytes for line buffer used to parse settings and patch file.
+ * Must be max length of name plus characters used to define chip version.
+ */
+#define LINE_BUFFER_LENGTH (NAME_MAX + 30)
+
+/**
+ * cg2900_tx_to_chip() - Transmit buffer to the transport.
+ * @user: User data for BT command channel.
+ * @logger: User data for logger channel.
+ * @skb: Data packet.
+ *
+ * The transmit_skb_to_chip() function transmit buffer to the transport.
+ * If enabled, copy the transmitted data to the HCI logger as well.
+ */
+void cg2900_tx_to_chip(struct cg2900_user_data *user,
+ struct cg2900_user_data *logger, struct sk_buff *skb)
+{
+ int err;
+ struct sk_buff *skb_log;
+ struct cg2900_chip_dev *chip_dev;
+
+ dev_dbg(user->dev, "cg2900_tx_to_chip %d bytes.\n", skb->len);
+
+ if (!logger)
+ goto transmit;
+
+ /*
+ * Alloc a new sk_buff and copy the data into it. Then send it to
+ * the HCI logger.
+ */
+ skb_log = alloc_skb(skb->len + HCI_H4_SIZE, GFP_KERNEL);
+ if (!skb_log) {
+ dev_err(user->dev,
+ "cg2900_tx_to_chip: Couldn't allocate skb_log\n");
+ goto transmit;
+ }
+
+ memcpy(skb_put(skb_log, skb->len), skb->data, skb->len);
+ skb_log->data[0] = (u8) LOGGER_DIRECTION_TX;
+
+ if (logger->read_cb)
+ logger->read_cb(logger, skb_log);
+
+transmit:
+ chip_dev = cg2900_get_prv(user);
+ err = chip_dev->t_cb.write(chip_dev, skb);
+ if (err) {
+ dev_err(user->dev, "cg2900_tx_to_chip: Transport write failed "
+ "(%d)\n", err);
+ kfree_skb(skb);
+ }
+}
+EXPORT_SYMBOL_GPL(cg2900_tx_to_chip);
+
+/**
+ * cg2900_tx_no_user() - Transmit buffer to the transport.
+ * @dev: Current chip to transmit to.
+ * @skb: Data packet.
+ *
+ * This function transmits buffer to the transport when no user exist (system
+ * startup for example).
+ */
+void cg2900_tx_no_user(struct cg2900_chip_dev *dev, struct sk_buff *skb)
+{
+ int err;
+
+ dev_dbg(dev->dev, "cg2900_tx_no_user %d bytes.\n", skb->len);
+
+ err = dev->t_cb.write(dev, skb);
+ if (err) {
+ dev_err(dev->dev, "cg2900_tx_no_user: Transport write failed "
+ "(%d)\n", err);
+ kfree_skb(skb);
+ }
+}
+EXPORT_SYMBOL_GPL(cg2900_tx_no_user);
+
+/**
+ * create_and_send_bt_cmd() - Copy and send sk_buffer.
+ * @user: User data for current channel.
+ * @logger: User data for logger channel.
+ * @data: Data to send.
+ * @length: Length in bytes of data.
+ *
+ * The create_and_send_bt_cmd() function allocate sk_buffer, copy supplied data
+ * to it, and send the sk_buffer to controller.
+ */
+void cg2900_send_bt_cmd(struct cg2900_user_data *user,
+ struct cg2900_user_data *logger,
+ void *data, int length)
+{
+ struct sk_buff *skb;
+
+ skb = user->alloc_skb(length, GFP_KERNEL);
+ if (!skb) {
+ dev_err(user->dev, "cg2900_send_bt_cmd: Couldn't alloc "
+ "sk_buff with length %d\n", length);
+ return;
+ }
+
+ memcpy(skb_put(skb, length), data, length);
+ skb_push(skb, HCI_H4_SIZE);
+ skb->data[0] = HCI_BT_CMD_H4_CHANNEL;
+
+ cg2900_tx_to_chip(user, logger, skb);
+}
+EXPORT_SYMBOL_GPL(cg2900_send_bt_cmd);
+
+/**
+ * cg2900_send_bt_cmd_no_user() - Copy and send sk_buffer with no assigned user.
+ * @dev: Current chip to transmit to.
+ * @data: Data to send.
+ * @length: Length in bytes of data.
+ *
+ * The cg2900_send_bt_cmd_no_user() function allocate sk_buffer, copy supplied
+ * data to it, and send the sk_buffer to controller.
+ */
+void cg2900_send_bt_cmd_no_user(struct cg2900_chip_dev *dev, void *data,
+ int length)
+{
+ struct sk_buff *skb;
+
+ skb = alloc_skb(length + HCI_H4_SIZE, GFP_KERNEL);
+ if (!skb) {
+ dev_err(dev->dev, "cg2900_send_bt_cmd_no_user: Couldn't alloc "
+ "sk_buff with length %d\n", length);
+ return;
+ }
+
+ skb_reserve(skb, HCI_H4_SIZE);
+ memcpy(skb_put(skb, length), data, length);
+ skb_push(skb, HCI_H4_SIZE);
+ skb->data[0] = HCI_BT_CMD_H4_CHANNEL;
+
+ cg2900_tx_no_user(dev, skb);
+}
+EXPORT_SYMBOL_GPL(cg2900_send_bt_cmd_no_user);
+
+/**
+ * create_work_item() - Create work item and add it to the work queue.
+ * @wq: Work queue.
+ * @work_func: Work function.
+ * @user_data: Arbitrary data set by user.
+ *
+ * The create_work_item() function creates work item and add it to
+ * the work queue.
+ * Note that work is allocated by kmalloc and work must be freed when work
+ * function is started.
+ */
+void cg2900_create_work_item(struct workqueue_struct *wq, work_func_t work_func,
+ void *user_data)
+{
+ struct cg2900_work *new_work;
+ int err;
+
+ new_work = kmalloc(sizeof(*new_work), GFP_ATOMIC);
+ if (!new_work) {
+ pr_err("Failed to alloc memory for new_work");
+ return;
+ }
+
+ INIT_WORK(&new_work->work, work_func);
+ new_work->user_data = user_data;
+
+ err = queue_work(wq, &new_work->work);
+ if (!err) {
+ pr_err("Failed to queue work_struct because it's already "
+ "in the queue");
+ kfree(new_work);
+ }
+}
+EXPORT_SYMBOL_GPL(cg2900_create_work_item);
+
+/**
+ * cg2900_get_text_line()- Replacement function for stdio function fgets.
+ * @wr_buffer: Buffer to copy text to.
+ * @max_nbr_of_bytes: Max number of bytes to read, i.e. size of rd_buffer.
+ * @rd_buffer: Data to parse.
+ * @bytes_copied: Number of bytes copied to wr_buffer.
+ *
+ * This function extracts one line of text from input file.
+ *
+ * Returns:
+ * Pointer to next data to read.
+ */
+char *cg2900_get_text_line(char *wr_buffer, int max_nbr_of_bytes,
+ char *rd_buffer, int *bytes_copied)
+{
+ char *curr_wr = wr_buffer;
+ char *curr_rd = rd_buffer;
+ char in_byte;
+
+ *bytes_copied = 0;
+
+ do {
+ *curr_wr = *curr_rd;
+ in_byte = *curr_wr;
+ curr_wr++;
+ curr_rd++;
+ (*bytes_copied)++;
+ } while ((*bytes_copied <= max_nbr_of_bytes) && (in_byte != '\0') &&
+ (in_byte != '\n'));
+ *curr_wr = '\0';
+ return curr_rd;
+}
+EXPORT_SYMBOL_GPL(cg2900_get_text_line);
+
+/**
+ * cg2900_get_file_name() - Parse info file and find correct target file.
+ * @fw: Firmware structure containing file data.
+ * @file_name: (out) Pointer to name of requested file.
+ * @hci_revision: HCI revision of chip.
+ * @hci_sub_version: HCI sub version of chip.
+ *
+ * Returns:
+ * true, if target file was found,
+ * false, otherwise.
+ */
+bool cg2900_get_file_name(const struct firmware *fw, char **file_name,
+ u16 hci_revision, u16 hci_sub_version)
+{
+ char *line_buffer;
+ char *curr_file_buffer;
+ int bytes_left_to_parse = fw->size;
+ int bytes_read = 0;
+ bool file_found = false;
+ u32 hci_rev;
+ u32 lmp_sub;
+
+ curr_file_buffer = (char *)&(fw->data[0]);
+
+ line_buffer = kzalloc(LINE_BUFFER_LENGTH, GFP_KERNEL);
+ if (!line_buffer) {
+ pr_err("cg2900_get_file_name: Failed to allocate line_buffer");
+ return false;
+ }
+
+ while (!file_found) {
+ /* Get one line of text from the file to parse */
+ curr_file_buffer = cg2900_get_text_line(line_buffer,
+ min(LINE_BUFFER_LENGTH,
+ (int)(fw->size - bytes_read)),
+ curr_file_buffer,
+ &bytes_read);
+
+ bytes_left_to_parse -= bytes_read;
+ if (bytes_left_to_parse <= 0) {
+ /* End of file => Leave while loop */
+ pr_err("cg2900_get_file_name: Reached end of file. No "
+ "file found\n");
+ break;
+ }
+
+ /*
+ * Check if the line of text is a comment or not, comments begin
+ * with '#'
+ */
+ if (*line_buffer == '#')
+ continue;
+
+ hci_rev = 0;
+ lmp_sub = 0;
+
+ pr_debug("cg2900_get_file_name: Found a valid line: \t%s",
+ line_buffer);
+
+ /*
+ * Check if we can find the correct HCI revision and
+ * LMP subversion as well as a file name in
+ * the text line.
+ */
+ if (sscanf(line_buffer, "%x%x%s", &hci_rev, &lmp_sub,
+ *file_name) == 3
+ && hci_rev == hci_revision && lmp_sub == hci_sub_version) {
+ pr_debug("cg2900_get_file_name: File found for chip:\n"
+ "\tFile name = %s\n"
+ "\tHCI Revision = 0x%X\n"
+ "\tLMP PAL Subversion = 0x%X",
+ *file_name, hci_rev, lmp_sub);
+
+ /*
+ * Name has already been stored above. Nothing more to
+ * do.
+ */
+ file_found = true;
+ } else
+ /* Zero the name buffer so it is clear to next read */
+ memset(*file_name, 0x00, NAME_MAX + 1);
+ }
+ kfree(line_buffer);
+
+ return file_found;
+}
+EXPORT_SYMBOL_GPL(cg2900_get_file_name);
+
+/**
+ * read_and_send_file_part() - Transmit a part of the supplied file.
+ * @user: User data for current channel.
+ * @logger: User data for logger channel.
+ * @info: File information.
+ *
+ * The cg2900_read_and_send_file_part() function transmit a part of the supplied
+ * file to the controller.
+ *
+ * Returns:
+ * 0 if there is no more data in the file.
+ * >0 for number of bytes sent.
+ * -ENOMEM if skb allocation failed.
+ */
+int cg2900_read_and_send_file_part(struct cg2900_user_data *user,
+ struct cg2900_user_data *logger,
+ struct cg2900_file_info *info)
+{
+ int bytes_to_copy;
+ struct sk_buff *skb;
+ struct bt_vs_write_file_block_cmd *cmd;
+ int plen;
+
+ /*
+ * Calculate number of bytes to copy;
+ * either max bytes for HCI packet or number of bytes left in file
+ */
+ bytes_to_copy = min((int)HCI_BT_SEND_FILE_MAX_CHUNK_SIZE,
+ (int)(info->fw_file->size - info->file_offset));
+
+ if (bytes_to_copy <= 0) {
+ /* Nothing more to read in file. */
+ dev_dbg(user->dev, "File download finished\n");
+ info->chunk_id = 0;
+ info->file_offset = 0;
+ return 0;
+ }
+
+ /* There is more data to send */
+ plen = sizeof(*cmd) + bytes_to_copy;
+ skb = user->alloc_skb(plen, GFP_KERNEL);
+ if (!skb) {
+ dev_err(user->dev, "Couldn't allocate sk_buffer\n");
+ return -ENOMEM;
+ }
+
+ skb_put(skb, plen);
+
+ cmd = (struct bt_vs_write_file_block_cmd *)skb->data;
+ cmd->opcode = cpu_to_le16(CG2900_BT_OP_VS_WRITE_FILE_BLOCK);
+ cmd->plen = BT_PARAM_LEN(plen);
+ cmd->id = info->chunk_id;
+ info->chunk_id++;
+
+ /* Copy the data from offset position */
+ memcpy(cmd->data,
+ &(info->fw_file->data[info->file_offset]),
+ bytes_to_copy);
+
+ /* Increase offset with number of bytes copied */
+ info->file_offset += bytes_to_copy;
+
+ skb_push(skb, CG2900_SKB_RESERVE);
+ skb->data[0] = HCI_BT_CMD_H4_CHANNEL;
+
+ cg2900_tx_to_chip(user, logger, skb);
+
+ return bytes_to_copy;
+}
+EXPORT_SYMBOL_GPL(cg2900_read_and_send_file_part);
+
+MODULE_AUTHOR("Par-Gunnar Hjalmdahl ST-Ericsson");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Linux CG2900 Library functions");
diff --git a/drivers/mfd/cg2900/cg2900_lib.h b/drivers/mfd/cg2900/cg2900_lib.h
new file mode 100644
index 0000000..796f1b7
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_lib.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson CG2900 GPS/BT/FM controller.
+ */
+
+#ifndef _CG2900_LIB_H_
+#define _CG2900_LIB_H_
+
+#include <linux/firmware.h>
+#include <linux/skbuff.h>
+#include <linux/workqueue.h>
+#include <linux/mfd/cg2900.h>
+
+/**
+ * struct cg2900_work - Generic work structure.
+ * @work: Work structure.
+ * @user_data: Arbitrary data set by user.
+ */
+struct cg2900_work {
+ struct work_struct work;
+ void *user_data;
+};
+
+/**
+ * struct cg2900_file_info - Info structure for file to download.
+ * @fw_file: Stores firmware file.
+ * @file_offset: Current read offset in firmware file.
+ * @chunk_id: Stores current chunk ID of write file
+ * operations.
+ */
+struct cg2900_file_info {
+ const struct firmware *fw_file;
+ int file_offset;
+ u8 chunk_id;
+};
+
+extern void cg2900_tx_to_chip(struct cg2900_user_data *user,
+ struct cg2900_user_data *logger,
+ struct sk_buff *skb);
+extern void cg2900_tx_no_user(struct cg2900_chip_dev *dev, struct sk_buff *skb);
+extern void cg2900_send_bt_cmd(struct cg2900_user_data *user,
+ struct cg2900_user_data *logger,
+ void *data, int length);
+extern void cg2900_send_bt_cmd_no_user(struct cg2900_chip_dev *dev, void *data,
+ int length);
+extern void cg2900_create_work_item(struct workqueue_struct *wq,
+ work_func_t work_func,
+ void *user_data);
+extern char *cg2900_get_text_line(char *wr_buffer, int max_nbr_of_bytes,
+ char *rd_buffer, int *bytes_copied);
+extern bool cg2900_get_file_name(const struct firmware *fw, char **file_name,
+ u16 hci_revision, u16 hci_sub_version);
+extern int cg2900_read_and_send_file_part(struct cg2900_user_data *user,
+ struct cg2900_user_data *logger,
+ struct cg2900_file_info *info);
+
+#endif /* _CG2900_LIB_H_ */
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index e30e008..c289ecf 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -698,6 +698,11 @@ struct hci_ev_cmd_status {
__le16 opcode;
} __packed;
+#define HCI_EV_HW_ERROR 0x10
+struct hci_ev_hw_error {
+ __u8 hw_code;
+} __packed;
+
#define HCI_EV_ROLE_CHANGE 0x12
struct hci_ev_role_change {
__u8 status;
--
1.7.3.2
--
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