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Message-ID: <1530647879-10007-5-git-send-email-pawell@cadence.com>
Date: Tue, 3 Jul 2018 20:57:48 +0100
From: Pawel Laszczak <pawell@...ence.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
<linux-usb@...r.kernel.org>, Felipe Balbi <balbi@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <ltyrala@...ence.com>,
<pawell@...ence.com>
Subject: [PATCH 04/15] Introduce Cadence USBSSP DRD Driver - added gadget.h file
Signed-off-by: Laszczak Pawel <pawell@...ence.com>
---
drivers/usb/usbssp/gadget.h | 2422 +++++++++++++++++++++++++++++++++++
1 file changed, 2422 insertions(+)
create mode 100644 drivers/usb/usbssp/gadget.h
diff --git a/drivers/usb/usbssp/gadget.h b/drivers/usb/usbssp/gadget.h
new file mode 100644
index 000000000000..2329c1649fed
--- /dev/null
+++ b/drivers/usb/usbssp/gadget.h
@@ -0,0 +1,2422 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USBSSP device controller driver
+ *
+ * Copyright (C) 2018 Cadence.
+ *
+ * Author: Pawel Laszczak
+ * Some code borrowed from the Linux XHCI driver.
+ */
+#ifndef __LINUX_USBSSP_GADGET_H
+#define __LINUX_USBSSP_GADGET_H
+
+#include <linux/usb.h>
+#include <linux/timer.h>
+#include <linux/kernel.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/usb/gadget.h>
+#include "gadget-ext-caps.h"
+
+/* Max number slots - only 1 is allowed */
+#define DEV_MAX_SLOTS 1
+
+/* max ports for USBSSP-Dev - only 2 are allowed*/
+#define MAX_USBSSP_PORTS 2
+
+#define USBSSP_EP0_SETUP_SIZE 512
+
+/*16 for in and 16 for out */
+#define USBSSP_ENDPOINTS_NUM 32
+
+/* HCSPARAMS1 - hcs_params1 - bitmasks */
+/* bits 0:7, Max Device Slots */
+#define DEV_HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff)
+#define DEV_HCS_SLOTS_MASK 0xff
+
+/*
+ * USBSSP register interface.
+ */
+/**
+ * struct usbssp_cap_regs - USBSSP Registers.
+ * @hc_capbase: length of the capabilities register and DC version number
+ * @hcs_params1: HCSPARAMS1 - Structural Parameters 1
+ * @hcs_params2: HCSPARAMS2 - Structural Parameters 2
+ * @hcs_params3: HCSPARAMS3 - Structural Parameters 3
+ * @hcc_params: HCCPARAMS - Capability Parameters
+ * @db_off: DBOFF - Doorbell array offset
+ * @run_regs_off: RTSOFF - Runtime register space offset
+ * @hcc_params2: HCCPARAMS2 Capability Parameters 2,
+ */
+struct usbssp_cap_regs {
+ __le32 hc_capbase;
+ __le32 hcs_params1;
+ __le32 hcs_params2;
+ __le32 hcs_params3;
+ __le32 hcc_params;
+ __le32 db_off;
+ __le32 run_regs_off;
+ __le32 hcc_params2;
+ /* Reserved up to (CAPLENGTH - 0x1C) */
+};
+
+/* hc_capbase bitmasks */
+/* bits 7:0 - how long is the Capabilities register */
+#define HC_LENGTH(p) USBSSP_HC_LENGTH(p)
+/* bits 31:16 */
+#define HC_VERSION(p) (((p) >> 16) & 0xffff)
+
+/* HCSPARAMS1 - hcs_params1 - bitmasks */
+/* bits 0:7, Max Device Slots */
+#define HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff)
+#define HCS_SLOTS_MASK 0xff
+/* bits 8:18, Max Interrupters */
+#define HCS_MAX_INTRS(p) (((p) >> 8) & 0x7ff)
+/* bits 24:31, Max Ports - max value is 0x7F = 127 ports */
+#define HCS_MAX_PORTS(p) (((p) >> 24) & 0x7f)
+
+/* HCSPARAMS2 - hcs_params2 - bitmasks */
+/* bits 0:3, Isochronous Scheduling Threshold (IST)*/
+#define HCS_IST(p) (((p) >> 0) & 0xf)
+/* bits 4:7, max number of Event Ring segments */
+#define HCS_ERST_MAX(p) (((p) >> 4) & 0xf)
+/* bits 21:25 Hi 5 bits of Scratchpad buffers SW must allocate for the HW */
+/* bit 26 Scratchpad restore - for save/restore HW state - not used yet */
+/* bits 27:31 Lo 5 bits of Scratchpad buffers SW must allocate for the HW */
+#define HCS_MAX_SCRATCHPAD(p) ((((p) >> 16) & 0x3e0) | (((p) >> 27) & 0x1f))
+
+/* HCSPARAMS3 - hcs_params3 - bitmasks */
+/* bits 0:7, Max U1 to U0 latency for the roothub ports */
+#define HCS_U1_LATENCY(p) (((p) >> 0) & 0xff)
+/* bits 16:31, Max U2 to U0 latency for the roothub ports */
+#define HCS_U2_LATENCY(p) (((p) >> 16) & 0xffff)
+
+/* HCCPARAMS - hcc_params - bitmasks */
+/* true: DC can use 64-bit address pointers */
+#define HCC_64BIT_ADDR(p) ((p) & (1 << 0))
+/* true: DC uses 64-byte Device Context structures*/
+#define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2))
+/* true: DC has port indicators */
+#define HCS_INDICATOR(p) ((p) & (1 << 4))
+/* true: no secondary Stream ID Support */
+#define HCC_NSS(p) ((p) & (1 << 7))
+/*true: DC parse All Event Data*/
+#define HCC_PAE(p) ((p) & (1<<8))
+/* true: DC supports Stopped - Short Packet */
+#define HCC_SPC(p) ((p) & (1 << 9))
+/*true: DC support a stopped EDTLA Capability (SEC) */
+#define HCC_SEC(p) ((p) & (1 << 10))
+/* true: DC has Contiguous Frame ID Capability */
+#define HCC_CFC(p) ((p) & (1 << 11))
+/* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */
+#define HCC_MAX_PSA(p) (1 << ((((p) >> 12) & 0xf) + 1))
+/* Extended Capabilities pointer from PCI base - section 5.3.6 */
+#define HCC_EXT_CAPS(p) USBSSP_HCC_EXT_CAPS(p)
+
+
+#define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32)
+
+/* db_off bitmask - bits 0:1 reserved */
+#define DBOFF_MASK (~0x3)
+
+/* run_regs_off bitmask - bits 0:4 reserved */
+#define RTSOFF_MASK (~0x1f)
+
+/* HCCPARAMS2 - hcc_params2 - bitmasks */
+/* true: DC supports U3 entry Capability */
+#define HCC2_U3C(p) ((p) & (1 << 0))
+/* true: DC supports Force Save context Capability */
+#define HCC2_FSC(p) ((p) & (1 << 2))
+/* true: DC supports Compliance Transition Capability */
+#define HCC2_CTC(p) ((p) & (1 << 3))
+/* true: DC support Large ESIT payload Capability > 48k */
+#define HCC2_LEC(p) ((p) & (1 << 4))
+/* true: DC support Extended TBC Capability, Isoc burst count > 65535 */
+#define HCC2_ETC(p) ((p) & (1 << 6))
+
+/* Number of registers per port */
+#define NUM_PORT_REGS 4
+
+#define PORTSC 0
+#define PORTPMSC 1
+#define PORTLI 2
+#define PORTHLPMC 3
+
+/**
+ * struct usbssp_op_regs - Device Controller Operational Registers.
+ * @command: USBCMD - DC command register
+ * @status: USBSTS - DC status register
+ * @page_size: This indicates the page size that the device controller
+ * supports. If bit n is set, the DC supports a page size
+ * of 2^(n+12), up to a 128MB page size.
+ * 4K is the minimum page size.
+ * @cmd_ring: CRP - 64-bit Command Ring Pointer
+ * @dcbaa_ptr: DCBAAP - 64-bit Device Context Base Address Array Pointer
+ * @config_reg: CONFIG - Configure Register
+ * @port_status_base: PORTSCn - base address for Port Status and Control
+ * Each port has a Port Status and Control register,
+ * followed by a Port Power Management Status and Control
+ * register, a Port Link Info register, and a reserved
+ * register.
+ * @port_power_base: PORTPMSCn - base address for
+ * Port Power Management Status and Control
+ * @port_link_base: PORTLIn - base address for Port Link Info (current
+ * Link PM state and control) for USB 2.1 and USB 3.0
+ * devices.
+ */
+struct usbssp_op_regs {
+ __le32 command;
+ __le32 status;
+ __le32 page_size;
+ __le32 reserved1;
+ __le32 reserved2;
+ __le32 dev_notification;
+ __le64 cmd_ring;
+ /* rsvd: offset 0x20-2F */
+ __le32 reserved3[4];
+ __le64 dcbaa_ptr;
+ __le32 config_reg;
+ /* rsvd: offset 0x3C-3FF */
+ __le32 reserved4[241];
+ /* port 1 registers, which serve as a base address for other ports */
+ __le32 port_status_base;
+ __le32 port_power_base;
+ __le32 port_link_base;
+ __le32 reserved5;
+ /* registers for ports 2-255 */
+ __le32 reserved6[NUM_PORT_REGS*254];
+};
+
+/* USBCMD - USB command - command bitmasks */
+/* start/stop DC execution - do not write unless DC is halted*/
+#define CMD_RUN USBSSP_CMD_RUN
+
+/* Reset DC - resets internal DC state machine and all registers (except
+ * PCI config regs).
+ */
+#define CMD_RESET (1 << 1)
+/* Event Interrupt Enable - a '1' allows interrupts from the device controller*/
+#define CMD_EIE USBSSP_CMD_EIE
+/* Device System Error Interrupt Enable - get out-of-band signal for DC errors*/
+#define CMD_HSEIE USBSSP_CMD_HSEIE
+/* device controller save/restore state. */
+#define CMD_CSS (1 << 8)
+#define CMD_CRS (1 << 9)
+/* Enable Wrap Event - '1' means DC generates an event when MFINDEX wraps. */
+#define CMD_EWE USBSSP_CMD_EWE
+/* bit 14 Extended TBC Enable, changes Isoc TRB fields to support larger TBC */
+#define CMD_ETE (1 << 14)
+/*bit 13 CEM Enable (CME) */
+#define CMD_CEM (1 << 13)
+/* Device Enable bit */
+#define CMD_DEVEN (1 << 15)
+/* bits 16:31 are reserved (and should be preserved on writes). */
+
+/* IMAN - Interrupt Management Register */
+#define IMAN_IE (1 << 1)
+#define IMAN_IP (1 << 0)
+
+/* USBSTS - USB status - status bitmasks */
+/* DC not running - set to 1 when run/stop bit is cleared. */
+#define STS_HALT USBSSP_STS_HALT
+/* serious error, e.g. PCI parity error. The DC will clear the run/stop bit. */
+#define STS_FATAL (1 << 2)
+/* event interrupt - clear this prior to clearing any IP flags in IR set*/
+#define STS_EINT (1 << 3)
+/* port change detect */
+#define STS_PORT (1 << 4)
+/* bits 5:7 reserved and zeroed */
+/* save state status - '1' means DC is saving state */
+#define STS_SAVE (1 << 8)
+/* restore state status - '1' means DC is restoring state */
+#define STS_RESTORE (1 << 9)
+/* true: save or restore error */
+#define STS_SRE (1 << 10)
+/* true: Controller Not Ready to accept doorbell or op reg writes after reset */
+#define STS_CNR USBSSP_STS_CNR
+/* true: internal Device Controller Error - SW needs to reset and reinitialize*/
+#define STS_HCE (1 << 12)
+/* bits 13:31 reserved and should be preserved */
+
+/* CRCR - Command Ring Control Register - cmd_ring bitmasks */
+/* bit 0 is the command ring cycle state */
+/* stop ring operation after completion of the currently executing command */
+#define CMD_RING_PAUSE (1 << 1)
+/* stop ring immediately - abort the currently executing command */
+#define CMD_RING_ABORT (1 << 2)
+/* true: command ring is running */
+#define CMD_RING_RUNNING (1 << 3)
+/* bits 4:5 reserved and should be preserved */
+/* Command Ring pointer - bit mask for the lower 32 bits. */
+#define CMD_RING_RSVD_BITS (0x3f)
+
+/* CONFIG - Configure Register - config_reg bitmasks */
+/* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */
+#define MAX_DEVS(p) ((p) & 0xff)
+/* bit 8: U3 Entry Enabled, assert PLC when controller enters U3*/
+#define CONFIG_U3E (1 << 8)
+/* bit 9: Configuration Information Enable */
+#define CONFIG_CIE (1 << 9)
+/* bits 10:31 - reserved and should be preserved */
+
+/* PORTSC - Port Status and Control Register - port_status_base bitmasks */
+/* true: device connected */
+#define PORT_CONNECT (1 << 0)
+/* true: port enabled */
+#define PORT_PE (1 << 1)
+/* bit 2 reserved and zeroed */
+/* true: port has an over-current condition */
+#define PORT_OC (1 << 3)
+/* true: port reset signaling asserted */
+#define PORT_RESET (1 << 4)
+/* Port Link State - bits 5:8
+ * A read gives the current link PM state of the port,
+ * a write with Link State Write Strobe set sets the link state.
+ */
+
+#define PORT_PLS_MASK (0xf << 5)
+#define XDEV_U0 (0x0 << 5)
+#define XDEV_U1 (0x1 << 5)
+#define XDEV_U2 (0x2 << 5)
+#define XDEV_U3 (0x3 << 5)
+#define XDEV_DISABLED (0x4 << 5)
+#define XDEV_RXDETECT (0x5 << 5)
+#define XDEV_INACTIVE (0x6 << 5)
+#define XDEV_POLLING (0x7 << 5)
+#define XDEV_RECOVERY (0x8 << 5)
+#define XDEV_HOT_RESET (0x9 << 5)
+#define XDEV_COMP_MODE (0xa << 5)
+#define XDEV_TEST_MODE (0xb << 5)
+#define XDEV_RESUME (0xf << 5)
+
+/* true: port has power (see HCC_PPC) */
+#define PORT_POWER (1 << 9)
+/* bits 10:13 indicate device speed:
+ * 0 - undefined speed - port hasn't be initialized by a reset yet
+ * 1 - full speed
+ * 2 - low speed
+ * 3 - high speed
+ * 4 - super speed
+ * 5-15 reserved
+ */
+#define DEV_SPEED_MASK (0xf << 10)
+#define XDEV_FS (0x1 << 10)
+#define XDEV_LS (0x2 << 10)
+#define XDEV_HS (0x3 << 10)
+#define XDEV_SS (0x4 << 10)
+#define XDEV_SSP (0x5 << 10)
+#define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10))
+#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
+#define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS)
+#define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
+#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
+#define DEV_SUPERSPEEDPLUS(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP)
+#define DEV_SUPERSPEED_ANY(p) (((p) & DEV_SPEED_MASK) >= XDEV_SS)
+#define DEV_PORT_SPEED(p) (((p) >> 10) & 0x0f)
+
+/* Bits 20:23 in the Slot Context are twice */
+#define SLOT_SPEED_FS (XDEV_FS << 10)
+#define SLOT_SPEED_LS (XDEV_LS << 10)
+#define SLOT_SPEED_HS (XDEV_HS << 10)
+#define SLOT_SPEED_SS (XDEV_SS << 10)
+#define SLOT_SPEED_SSP (XDEV_SSP << 10)
+
+/* Port Link State Write Strobe - set this when changing link state */
+#define PORT_LINK_STROBE (1 << 16)
+/* true: connect status change */
+#define PORT_CSC (1 << 17)
+/* true: port enable change */
+#define PORT_PEC (1 << 18)
+/* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port
+ * into an enabled state, and the device into the default state. A "warm" reset
+ * also resets the link, forcing the device through the link training sequence.
+ * SW can also look at the Port Reset register to see when warm reset is done.
+ */
+#define PORT_WRC (1 << 19)
+/* true: over-current change */
+#define PORT_OCC (1 << 20)
+/* true: reset change - 1 to 0 transition of PORT_RESET */
+#define PORT_RC (1 << 21)
+/* port link status change - set on some port link state transitions:
+ * Transition Reason
+ * ------------------------------------------------------------------------------
+ * - U3 to Resume Wakeup signaling from a device
+ * - Resume to Recovery to U0 USB 3.0 device resume
+ * - Resume to U0 USB 2.0 device resume
+ * - U3 to Recovery to U0 Software resume of USB 3.0 device complete
+ * - U3 to U0 Software resume of USB 2.0 device complete
+ * - U2 to U0 L1 resume of USB 2.1 device complete
+ * - U0 to U0 L1 entry rejection by USB 2.1 device
+ * - U0 to disabled L1 entry error with USB 2.1 device
+ * - Any state to inactive Error on USB 3.0 port
+ */
+#define PORT_PLC (1 << 22)
+/* port configure error change - port failed to configure its link partner */
+#define PORT_CEC (1 << 23)
+/* wake on connect (enable) */
+#define PORT_WKCONN_E (1 << 25)
+/* wake on disconnect (enable) */
+#define PORT_WKDISC_E (1 << 26)
+/* wake on over-current (enable) */
+#define PORT_WKOC_E (1 << 27)
+/* bits 28:30 reserved */
+/* Indicates if Warm Reset is being received*/
+#define PORT_WR (1 << 31)
+
+/* We mark duplicate entries with -1 */
+#define DUPLICATE_ENTRY ((u8)(-1))
+
+/* Port Power Management Status and Control - port_power_base bitmasks */
+/* Inactivity timer value for transitions into U1, in microseconds.
+ * Timeout can be up to 127us. 0xFF means an infinite timeout.
+ */
+#define PORT_U1_TIMEOUT(p) ((p) & 0xff)
+#define PORT_U1_TIMEOUT_MASK 0xff
+/* Inactivity timer value for transitions into U2 */
+#define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8)
+#define PORT_U2_TIMEOUT_MASK (0xff << 8)
+/* Bits 24:31 for port testing */
+
+/* USB2 Protocol PORTSPMSC */
+#define PORT_L1S_MASK 7
+#define PORT_L1S_SUCCESS 1
+#define PORT_RWE (1 << 3)
+#define PORT_HIRD(p) (((p) & 0xf) << 4)
+#define PORT_HIRD_MASK (0xf << 4)
+#define PORT_L1DS_MASK (0xff << 8)
+#define PORT_L1DS(p) (((p) & 0xff) << 8)
+#define PORT_HLE (1 << 16)
+#define PORT_TEST_MODE_SHIFT 28
+
+/* USB3 Protocol PORTLI Port Link Information */
+#define PORT_RX_LANES(p) (((p) >> 16) & 0xf)
+#define PORT_TX_LANES(p) (((p) >> 20) & 0xf)
+
+/* USB2 Protocol PORTHLPMC */
+#define PORT_HIRDM(p) ((p) & 3)
+#define PORT_L1_TIMEOUT(p) (((p) & 0xff) << 2)
+#define PORT_BESLD(p) (((p) & 0xf) << 10)
+
+/* use 512 microseconds as USB2 LPM L1 default timeout. */
+#define USBSSP_L1_TIMEOUT 512
+
+#define USBSSP_DEFAULT_BESL 4
+
+/**
+ * struct usbssp_intr_reg - Interrupt Register Set
+ * @irq_pending: IMAN - Interrupt Management Register. Used to enable
+ * interrupts and check for pending interrupts.
+ * @irq_control: IMOD - Interrupt Moderation Register.
+ * Used to throttle interrupts.
+ * @erst_size: Number of segments in the Event Ring Segment
+ * Table (ERST).
+ * @erst_base: ERST base address.
+ * @erst_dequeue: Event ring dequeue pointer.
+ *
+ * Each interrupter (defined by a MSI-X vector) has an event ring and an Event
+ * Ring Segment Table (ERST) associated with it. The event ring is comprised of
+ * multiple segments of the same size. The DC places events on the ring and
+ * "updates the Cycle bit in the TRBs to indicate to software the current
+ * position of the Enqueue Pointer." The driver processes those events and
+ * updates the dequeue pointer.
+ */
+struct usbssp_intr_reg {
+ __le32 irq_pending;
+ __le32 irq_control;
+ __le32 erst_size;
+ __le32 rsvd;
+ __le64 erst_base;
+ __le64 erst_dequeue;
+};
+
+/* irq_pending bitmasks */
+#define ER_IRQ_PENDING(p) ((p) & 0x1)
+/* bits 2:31 need to be preserved */
+/* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */
+#define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe)
+#define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2)
+#define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2))
+
+/* irq_control bitmasks */
+/* Minimum interval between interrupts (in 250ns intervals). The interval
+ * between interrupts will be longer if there are no events on the event ring.
+ * Default is 4000 (1 ms).
+ */
+#define ER_IRQ_INTERVAL_MASK (0xffff)
+/* Counter used to count down the time to the next interrupt - HW use only */
+#define ER_IRQ_COUNTER_MASK (0xffff << 16)
+
+/* erst_size bitmasks */
+/* Preserve bits 16:31 of erst_size */
+#define ERST_SIZE_MASK (0xffff << 16)
+
+/* erst_dequeue bitmasks */
+/* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
+ * where the current dequeue pointer lies. This is an optional HW hint.
+ */
+#define ERST_DESI_MASK (0x7)
+/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by
+ * a work queue (or delayed service routine)?
+ */
+#define ERST_EHB (1 << 3)
+#define ERST_PTR_MASK (0xf)
+
+/**
+ * struct usbssp_run_regs
+ * @microframe_index:
+ * MFINDEX - current microframe number
+ *
+ * Device Controller Runtime Registers:
+ * "Software should read and write these registers using only Dword (32 bit)
+ * or larger accesses"
+ */
+struct usbssp_run_regs {
+ __le32 microframe_index;
+ __le32 rsvd[7];
+ struct usbssp_intr_reg ir_set[128];
+};
+
+/**
+ * struct doorbell_array
+ *
+ * Bits 0 - 7: Endpoint target
+ * Bits 8 - 15: RsvdZ
+ * Bits 16 - 31: Stream ID
+ *
+ */
+struct usbssp_doorbell_array {
+ __le32 doorbell[2];
+};
+
+#define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16))
+#define DB_VALUE_EP0_OUT(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16))
+#define DB_VALUE_CMD 0x00000000
+
+/**
+ * struct usbssp_protocol_caps
+ * @revision: major revision, minor revision, capability ID,
+ * and next capability pointer.
+ * @name_string:Four ASCII characters to say which spec this DC
+ * follows, typically "USB ".
+ * @port_info: Port offset, count, and protocol-defined information.
+ */
+struct usbssp_protocol_caps {
+ u32 revision;
+ u32 name_string;
+ u32 port_info;
+};
+
+#define USBSSP_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff)
+#define USBSSP_EXT_PORT_MINOR(x) (((x) >> 16) & 0xff)
+#define USBSSP_EXT_PORT_PSIC(x) (((x) >> 28) & 0x0f)
+#define USBSSP_EXT_PORT_OFF(x) ((x) & 0xff)
+#define USBSSP_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff)
+
+#define USBSSP_EXT_PORT_PSIV(x) (((x) >> 0) & 0x0f)
+#define USBSSP_EXT_PORT_PSIE(x) (((x) >> 4) & 0x03)
+#define USBSSP_EXT_PORT_PLT(x) (((x) >> 6) & 0x03)
+#define USBSSP_EXT_PORT_PFD(x) (((x) >> 8) & 0x01)
+#define USBSSP_EXT_PORT_LP(x) (((x) >> 14) & 0x03)
+#define USBSSP_EXT_PORT_PSIM(x) (((x) >> 16) & 0xffff)
+
+#define PLT_MASK (0x03 << 6)
+#define PLT_SYM (0x00 << 6)
+#define PLT_ASYM_RX (0x02 << 6)
+#define PLT_ASYM_TX (0x03 << 6)
+
+/**
+ * struct usbssp_container_ctx
+ * @type: Type of context. Used to calculated offsets to contained contexts.
+ * @size: Size of the context data
+ * @bytes: The raw context data given to HW
+ * @dma: dma address of the bytes
+ *
+ * Represents either a Device or Input context. Holds a pointer to the raw
+ * memory used for the context (bytes) and dma address of it (dma).
+ */
+struct usbssp_container_ctx {
+ unsigned int type;
+#define USBSSP_CTX_TYPE_DEVICE 0x1
+#define USBSSP_CTX_TYPE_INPUT 0x2
+ int size;
+ u8 *bytes;
+ dma_addr_t dma;
+};
+
+/**
+ * struct usbssp_slot_ctx
+ * @dev_info: device speed, and last valid endpoint
+ * @dev_info2: Max exit latency for device number
+ * @int_target: interrupter target number
+ * @dev_state: slot state and device address
+ *
+ * Slot Context - This assumes the DC uses 32-byte context
+ * structures. If the DC uses 64-byte contexts, there is an additional 32 bytes
+ * reserved at the end of the slot context for DC internal use.
+ */
+struct usbssp_slot_ctx {
+ __le32 dev_info;
+ __le32 dev_info2;
+ __le32 int_target;
+ __le32 dev_state;
+ /* offset 0x10 to 0x1f reserved for DC internal use */
+ __le32 reserved[4];
+};
+
+/* dev_info bitmasks */
+/* Device speed - values defined by PORTSC Device Speed field - 20:23 */
+#define DEV_SPEED (0xf << 20)
+#define GET_DEV_SPEED(n) (((n) & DEV_SPEED) >> 20)
+/* bit 24-26 reserved */
+/* Index of the last valid endpoint context in this device context - 27:31 */
+#define LAST_CTX_MASK (0x1f << 27)
+#define LAST_CTX(p) ((p) << 27)
+#define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1)
+#define SLOT_FLAG (1 << 0)
+#define EP0_FLAG (1 << 1)
+
+/* dev_info2 bitmasks */
+/* Max Exit Latency (ms) - worst case time to wake up all links in dev path */
+#define MAX_EXIT (0xffff)
+/* Root device port number that is needed to access the USB device */
+#define ROOT_DEV_PORT(p) (((p) & 0xff) << 16)
+#define DEVINFO_TO_ROOT_DEV_PORT(p) (((p) >> 16) & 0xff)
+
+/* dev_state bitmasks */
+/* USB device address - assigned by the usbssp */
+#define DEV_ADDR_MASK (0xff)
+/* bits 8:26 reserved */
+/* Slot state */
+#define SLOT_STATE (0x1f << 27)
+#define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27)
+
+#define SLOT_STATE_DISABLED 0
+#define SLOT_STATE_ENABLED SLOT_STATE_DISABLED
+#define SLOT_STATE_DEFAULT 1
+#define SLOT_STATE_ADDRESSED 2
+#define SLOT_STATE_CONFIGURED 3
+
+/**
+ * struct usbssp_ep_ctx
+ * @ep_info: endpoint state, streams, mult, and interval information.
+ * @ep_info2: information on endpoint type, max packet size, max burst size,
+ * error count, and whether the DC will force an event for all
+ * transactions.
+ * @deq: 64-bit ring dequeue pointer address. If the endpoint only
+ * defines one stream, this points to the endpoint transfer ring.
+ * Otherwise, it points to a stream context array, which has a
+ * ring pointer for each flow.
+ * @tx_info:
+ * Average TRB lengths for the endpoint ring and
+ * max payload within an Endpoint Service Interval Time (ESIT).
+ *
+ * Endpoint Context - This assumes the DC uses 32-byte context
+ * structures. If the DC uses 64-byte contexts, there is an additional 32 bytes
+ * reserved at the end of the endpoint context for DC internal use.
+ */
+struct usbssp_ep_ctx {
+ __le32 ep_info;
+ __le32 ep_info2;
+ __le64 deq;
+ __le32 tx_info;
+ /* offset 0x14 - 0x1f reserved for DC internal use */
+ __le32 reserved[3];
+};
+
+/* ep_info bitmasks */
+/*
+ * Endpoint State - bits 0:2
+ * 0 - disabled
+ * 1 - running
+ * 2 - halted due to halt condition - ok to manipulate endpoint ring
+ * 3 - stopped
+ * 4 - TRB error
+ * 5-7 - reserved
+ */
+#define EP_STATE_MASK (0xf)
+#define EP_STATE_DISABLED 0
+#define EP_STATE_RUNNING 1
+#define EP_STATE_HALTED 2
+#define EP_STATE_STOPPED 3
+#define EP_STATE_ERROR 4
+#define GET_EP_CTX_STATE(ctx) (le32_to_cpu((ctx)->ep_info) & EP_STATE_MASK)
+
+/* Mult - Max number of burtst within an interval, in EP companion desc. */
+#define EP_MULT(p) (((p) & 0x3) << 8)
+#define CTX_TO_EP_MULT(p) (((p) >> 8) & 0x3)
+/* bits 10:14 are Max Primary Streams */
+/* bit 15 is Linear Stream Array */
+/* Interval - period between requests to an endpoint - 125u increments. */
+#define EP_INTERVAL(p) (((p) & 0xff) << 16)
+#define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff))
+#define CTX_TO_EP_INTERVAL(p) (((p) >> 16) & 0xff)
+#define EP_MAXPSTREAMS_MASK (0x1f << 10)
+#define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK)
+#define CTX_TO_EP_MAXPSTREAMS(p) (((p) & EP_MAXPSTREAMS_MASK) >> 10)
+/* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */
+#define EP_HAS_LSA (1 << 15)
+#define CTX_TO_MAX_ESIT_PAYLOAD_HI(p) (((p) >> 24) & 0xff)
+
+/* ep_info2 bitmasks */
+/*
+ * Force Event - generate transfer events for all TRBs for this endpoint
+ * This will tell the DC to ignore the IOC and ISP flags (for debugging only).
+ */
+#define FORCE_EVENT (0x1)
+#define ERROR_COUNT(p) (((p) & 0x3) << 1)
+#define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7)
+#define EP_TYPE(p) ((p) << 3)
+#define ISOC_OUT_EP 1
+#define BULK_OUT_EP 2
+#define INT_OUT_EP 3
+#define CTRL_EP 4
+#define ISOC_IN_EP 5
+#define BULK_IN_EP 6
+#define INT_IN_EP 7
+/* bit 6 reserved */
+/* bit 7 is Device Initiate Disable - for disabling stream selection */
+#define MAX_BURST(p) (((p)&0xff) << 8)
+#define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff)
+#define MAX_PACKET(p) (((p)&0xffff) << 16)
+#define MAX_PACKET_MASK (0xffff << 16)
+#define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff)
+
+/* Get max packet size from ep desc. Bit 10..0 specify the max packet size.
+ * USB2.0 spec 9.6.6.
+ */
+#define GET_MAX_PACKET(p) ((p) & 0x7ff)
+
+/* tx_info bitmasks */
+#define EP_AVG_TRB_LENGTH(p) ((p) & 0xffff)
+#define EP_MAX_ESIT_PAYLOAD_LO(p) (((p) & 0xffff) << 16)
+#define EP_MAX_ESIT_PAYLOAD_HI(p) ((((p) >> 16) & 0xff) << 24)
+#define CTX_TO_MAX_ESIT_PAYLOAD(p) (((p) >> 16) & 0xffff)
+
+/* deq bitmasks */
+#define EP_CTX_CYCLE_MASK (1 << 0)
+#define SCTX_DEQ_MASK (~0xfL)
+
+/**
+ * struct usbssp_input_control_context
+ * Input control context;
+ *
+ * @drop_context: set the bit of the endpoint context you want to disable
+ * @add_context: set the bit of the endpoint context you want to enable
+ */
+struct usbssp_input_control_ctx {
+ __le32 drop_flags;
+ __le32 add_flags;
+ __le32 rsvd2[6];
+};
+
+#define EP_IS_ADDED(ctrl_ctx, i) \
+ (le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))
+#define EP_IS_DROPPED(ctrl_ctx, i) \
+ (le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1)))
+
+/* Represents everything that is needed to issue a command on the command ring.
+ * It's useful to pre-allocate these for commands that cannot fail due to
+ * out-of-memory errors, like freeing streams.
+ */
+struct usbssp_command {
+ /* Input context for changing device state */
+ struct usbssp_container_ctx *in_ctx;
+ u32 status;
+ /* If completion is null, no one is waiting on this command
+ * and the structure can be freed after the command completes.
+ */
+ struct completion *completion;
+ union usbssp_trb *command_trb;
+ struct list_head cmd_list;
+};
+
+/* drop context bitmasks */
+#define DROP_EP(x) (0x1 << x)
+/* add context bitmasks */
+#define ADD_EP(x) (0x1 << x)
+
+struct usbssp_stream_ctx {
+ /* 64-bit stream ring address, cycle state, and stream type */
+ __le64 stream_ring;
+ /* offset 0x14 - 0x1f reserved for DC internal use */
+ __le32 reserved[2];
+};
+
+/* Stream Context Types - bits 3:1 of stream ctx deq ptr */
+#define SCT_FOR_CTX(p) (((p) & 0x7) << 1)
+/* Secondary stream array type, dequeue pointer is to a transfer ring */
+#define SCT_SEC_TR 0
+/* Primary stream array type, dequeue pointer is to a transfer ring */
+#define SCT_PRI_TR 1
+/* Dequeue pointer is for a secondary stream array (SSA) with 8 entries */
+#define SCT_SSA_8 2
+#define SCT_SSA_16 3
+#define SCT_SSA_32 4
+#define SCT_SSA_64 5
+#define SCT_SSA_128 6
+#define SCT_SSA_256 7
+
+/* Assume no secondary streams for now */
+struct usbssp_stream_info {
+ struct usbssp_ring **stream_rings;
+ /* Number of streams, including stream 0 (which drivers can't use) */
+ unsigned int num_streams;
+ /* The stream context array may be bigger than
+ * the number of streams the driver asked for
+ */
+ struct usbssp_stream_ctx *stream_ctx_array;
+ unsigned int num_stream_ctxs;
+ dma_addr_t ctx_array_dma;
+ /* For mapping physical TRB addresses to segments in stream rings */
+ struct radix_tree_root trb_address_map;
+ struct usbssp_command *free_streams_command;
+};
+
+#define SMALL_STREAM_ARRAY_SIZE 256
+#define MEDIUM_STREAM_ARRAY_SIZE 1024
+
+struct usbssp_ep {
+ struct usb_ep endpoint;
+ struct list_head pending_list;
+ struct usbssp_udc *usbssp_data;
+
+ u8 number;
+ u8 type;
+ u32 interval;
+ char name[20];
+ u8 direction;
+ u8 stream_capable;
+
+ struct usbssp_ring *ring;
+ /* Related to endpoints that are configured to use stream IDs only */
+ struct usbssp_stream_info *stream_info;
+ /* Temporary storage in case the configure endpoint command fails and we
+ * have to restore the device state to the previous state
+ */
+ struct usbssp_ring *new_ring;
+ unsigned int ep_state;
+
+#define SET_DEQ_PENDING (1 << 0)
+#define EP_HALTED (1 << 1) /* For stall handling */
+#define EP_STOP_CMD_PENDING (1 << 2) /* For USB request cancellation */
+/* Transitioning the endpoint to using streams, don't enqueue request */
+#define EP_GETTING_STREAMS (1 << 3)
+#define EP_HAS_STREAMS (1 << 4)
+/* Transitioning the endpoint to not using streams, don't enqueue requests */
+#define EP_GETTING_NO_STREAMS (1 << 5)
+#define USBSSP_EP_ENABLED (1<<6)
+#define USBSSP_EP_WEDGE (1<<8)
+#define USBSSP_EP_BUSY (1<<9)
+#define USBSSP_EP_CONF_PENDING (1<<10)
+#define USBSSP_EP_DISABLE_PENDING (1<<11)
+#define EP0_HALTED_STATUS (1 << 12) /*For stall handling of Status Stage*/
+
+ struct usbssp_td *stopped_td;
+ unsigned int stopped_stream;
+
+ /* Dequeue pointer and dequeue segment for a submitted Set TR Dequeue
+ * command. We'll need to update the ring's dequeue segment and dequeue
+ * pointer after the command completes.
+ */
+ struct usbssp_segment *queued_deq_seg;
+ union usbssp_trb *queued_deq_ptr;
+ /*
+ * Sometimes the DC can not process isochronous endpoint ring quickly
+ * enough, and it will miss some isoc tds on the ring and generate
+ * a Missed Service Error Event.
+ * Set skip flag when receive a Missed Service Error Event and
+ * process the missed tds on the endpoint ring.
+ */
+ bool skip;
+ /* Isoch Frame ID checking storage */
+ int next_frame_id;
+ /* Use new Isoch TRB layout needed for extended TBC support */
+ bool use_extended_tbc;
+};
+
+
+struct usbssp_device {
+ struct usb_gadget *gadget;
+
+ /*
+ * Commands to the hardware are passed an "input context" that
+ * tells the hardware what to change in its data structures.
+ * The hardware will return changes in an "output context" that
+ * software must allocate for the hardware. We need to keep
+ * track of input and output contexts separately because
+ * these commands might fail and we don't trust the hardware.
+ */
+ struct usbssp_container_ctx *out_ctx;
+ /* Used for addressing devices and configuration changes */
+ struct usbssp_container_ctx *in_ctx;
+
+ struct usbssp_ep eps[USBSSP_ENDPOINTS_NUM];
+ u8 port_num;
+
+ /* The current max exit latency for the enabled USB3 link states. */
+ u16 current_mel;
+
+ u8 usb2_hw_lpm_capable:1;
+ /* Used for the debugfs interfaces. */
+ void *debugfs_private;
+};
+
+/**
+ * struct usbssp_device_context_array
+ * @dev_context_ptr array of 64-bit DMA addresses for device contexts
+ */
+struct usbssp_device_context_array {
+ /* 64-bit device addresses; we only write 32-bit addresses */
+ __le64 dev_context_ptrs[DEV_MAX_SLOTS+1];
+ /* private pointers */
+ dma_addr_t dma;
+};
+
+struct usbssp_transfer_event {
+ /* 64-bit buffer address, or immediate data */
+ __le64 buffer;
+ __le32 transfer_len;
+ /* This field is interpreted differently based on the type of TRB */
+ __le32 flags;
+};
+
+/* Transfer event TRB length bit mask */
+/* bits 0:23 */
+#define EVENT_TRB_LEN(p) ((p) & 0xffffff)
+
+/** Transfer Event bit fields **/
+#define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f)
+
+/* Completion Code - only applicable for some types of TRBs */
+#define COMP_CODE_MASK (0xff << 24)
+#define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24)
+#define COMP_INVALID 0
+#define COMP_SUCCESS 1
+#define COMP_DATA_BUFFER_ERROR 2
+#define COMP_BABBLE_DETECTED_ERROR 3
+#define COMP_USB_TRANSACTION_ERROR 4
+#define COMP_TRB_ERROR 5
+#define COMP_RESOURCE_ERROR 7
+#define COMP_NO_SLOTS_AVAILABLE_ERROR 9
+#define COMP_INVALID_STREAM_TYPE_ERROR 10
+#define COMP_SLOT_NOT_ENABLED_ERROR 11
+#define COMP_ENDPOINT_NOT_ENABLED_ERROR 12
+#define COMP_SHORT_PACKET 13
+#define COMP_RING_UNDERRUN 14
+#define COMP_RING_OVERRUN 15
+#define COMP_VF_EVENT_RING_FULL_ERROR 16
+#define COMP_PARAMETER_ERROR 17
+#define COMP_CONTEXT_STATE_ERROR 19
+#define COMP_EVENT_RING_FULL_ERROR 21
+#define COMP_INCOMPATIBLE_DEVICE_ERROR 22
+#define COMP_MISSED_SERVICE_ERROR 23
+#define COMP_COMMAND_RING_STOPPED 24
+#define COMP_COMMAND_ABORTED 25
+#define COMP_STOPPED 26
+#define COMP_STOPPED_LENGTH_INVALID 27
+#define COMP_STOPPED_SHORT_PACKET 28
+#define COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR 29
+#define COMP_ISOCH_BUFFER_OVERRUN 31
+#define COMP_EVENT_LOST_ERROR 32
+#define COMP_UNDEFINED_ERROR 33
+#define COMP_INVALID_STREAM_ID_ERROR 34
+
+static inline const char *usbssp_trb_comp_code_string(u8 status)
+{
+ switch (status) {
+ case COMP_INVALID:
+ return "Invalid";
+ case COMP_SUCCESS:
+ return "Success";
+ case COMP_DATA_BUFFER_ERROR:
+ return "Data Buffer Error";
+ case COMP_BABBLE_DETECTED_ERROR:
+ return "Babble Detected";
+ case COMP_USB_TRANSACTION_ERROR:
+ return "USB Transaction Error";
+ case COMP_TRB_ERROR:
+ return "TRB Error";
+ case COMP_RESOURCE_ERROR:
+ return "Resource Error";
+ case COMP_NO_SLOTS_AVAILABLE_ERROR:
+ return "No Slots Available Error";
+ case COMP_INVALID_STREAM_TYPE_ERROR:
+ return "Invalid Stream Type Error";
+ case COMP_SLOT_NOT_ENABLED_ERROR:
+ return "Slot Not Enabled Error";
+ case COMP_ENDPOINT_NOT_ENABLED_ERROR:
+ return "Endpoint Not Enabled Error";
+ case COMP_SHORT_PACKET:
+ return "Short Packet";
+ case COMP_RING_UNDERRUN:
+ return "Ring Underrun";
+ case COMP_RING_OVERRUN:
+ return "Ring Overrun";
+ case COMP_VF_EVENT_RING_FULL_ERROR:
+ return "VF Event Ring Full Error";
+ case COMP_PARAMETER_ERROR:
+ return "Parameter Error";
+ case COMP_CONTEXT_STATE_ERROR:
+ return "Context State Error";
+ case COMP_EVENT_RING_FULL_ERROR:
+ return "Event Ring Full Error";
+ case COMP_INCOMPATIBLE_DEVICE_ERROR:
+ return "Incompatible Device Error";
+ case COMP_MISSED_SERVICE_ERROR:
+ return "Missed Service Error";
+ case COMP_COMMAND_RING_STOPPED:
+ return "Command Ring Stopped";
+ case COMP_COMMAND_ABORTED:
+ return "Command Aborted";
+ case COMP_STOPPED:
+ return "Stopped";
+ case COMP_STOPPED_LENGTH_INVALID:
+ return "Stopped - Length Invalid";
+ case COMP_STOPPED_SHORT_PACKET:
+ return "Stopped - Short Packet";
+ case COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR:
+ return "Max Exit Latency Too Large Error";
+ case COMP_ISOCH_BUFFER_OVERRUN:
+ return "Isoch Buffer Overrun";
+ case COMP_EVENT_LOST_ERROR:
+ return "Event Lost Error";
+ case COMP_UNDEFINED_ERROR:
+ return "Undefined Error";
+ case COMP_INVALID_STREAM_ID_ERROR:
+ return "Invalid Stream ID Error";
+ default:
+ return "Unknown!!";
+ }
+}
+struct usbssp_link_trb {
+ /* 64-bit segment pointer*/
+ __le64 segment_ptr;
+ __le32 intr_target;
+ __le32 control;
+};
+
+/* control bitfields */
+#define LINK_TOGGLE (0x1<<1)
+
+/* Command completion event TRB */
+struct usbssp_event_cmd {
+ /* Pointer to command TRB, or the value passed by the event data trb */
+ __le64 cmd_trb;
+ __le32 status;
+ __le32 flags;
+};
+
+/* flags bitmasks */
+
+/* Address device - disable SetAddress */
+#define TRB_BSR (1<<9)
+
+/* Configure Endpoint - Deconfigure */
+#define TRB_DC (1<<9)
+
+/* Stop Ring - Transfer State Preserve */
+#define TRB_TSP (1<<9)
+
+enum usbssp_ep_reset_type {
+ EP_HARD_RESET,
+ EP_SOFT_RESET,
+};
+
+/* Force Event */
+#define TRB_TO_VF_INTR_TARGET(p) (((p) & (0x3ff << 22)) >> 22)
+#define TRB_TO_VF_ID(p) (((p) & (0xff << 16)) >> 16)
+
+/* Set Latency Tolerance Value */
+#define TRB_TO_BELT(p) (((p) & (0xfff << 16)) >> 16)
+
+/* Get Port Bandwidth */
+#define TRB_TO_DEV_SPEED(p) (((p) & (0xf << 16)) >> 16)
+
+/* Force Header */
+#define TRB_TO_PACKET_TYPE(p) ((p) & 0x1f)
+#define TRB_TO_DEV_PORT(p) (((p) & (0xff << 24)) >> 24)
+
+enum usbssp_setup_dev {
+ SETUP_CONTEXT_ONLY,
+ SETUP_CONTEXT_ADDRESS,
+};
+
+/* bits 16:23 are the virtual function ID */
+/* bits 24:31 are the slot ID */
+#define TRB_TO_SLOT_ID(p) (((p) & (0xff<<24)) >> 24)
+#define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24)
+
+/* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */
+#define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1)
+#define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16)
+
+#define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23)
+#define TRB_TO_SUSPEND_PORT(p) (((p) & (1 << 23)) >> 23)
+#define LAST_EP_INDEX 30
+
+/* Set TR Dequeue Pointer command TRB fields. */
+#define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16))
+#define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16)
+#define SCT_FOR_TRB(p) (((p) << 1) & 0x7)
+
+/* Link TRB specific fields */
+#define TRB_TC (1<<1)
+
+/* Port Status Change Event TRB fields */
+/* Port ID - bits 31:24 */
+#define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24)
+
+#define EVENT_DATA (1 << 2)
+
+/* Normal TRB fields */
+/* transfer_len bitmasks - bits 0:16 */
+#define TRB_LEN(p) ((p) & 0x1ffff)
+/* TD Size, packets remaining in this TD, bits 21:17 (5 bits, so max 31) */
+#define TRB_TD_SIZE(p) (min((p), (u32)31) << 17)
+#define GET_TD_SIZE(p) (((p) & 0x3e0000) >> 17)
+/* DC uses the TD_SIZE field for TBC if Extended TBC is enabled (ETE) */
+#define TRB_TD_SIZE_TBC(p) (min((p), (u32)31) << 17)
+/* Interrupter Target - which MSI-X vector to target the completion event at */
+#define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22)
+#define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff)
+/* Total burst count field, Rsvdz on DC with Extended TBC enabled (ETE) */
+#define TRB_TBC(p) (((p) & 0x3) << 7)
+#define TRB_TLBPC(p) (((p) & 0xf) << 16)
+
+/* Cycle bit - indicates TRB ownership by DC or driver*/
+#define TRB_CYCLE (1<<0)
+/*
+ * Force next event data TRB to be evaluated before task switch.
+ * Used to pass OS data back after a TD completes.
+ */
+#define TRB_ENT (1<<1)
+/* Interrupt on short packet */
+#define TRB_ISP (1<<2)
+/* Set PCIe no snoop attribute */
+#define TRB_NO_SNOOP (1<<3)
+/* Chain multiple TRBs into a TD */
+#define TRB_CHAIN (1<<4)
+/* Interrupt on completion */
+#define TRB_IOC (1<<5)
+/* The buffer pointer contains immediate data */
+#define TRB_IDT (1<<6)
+
+/* Block Event Interrupt */
+#define TRB_BEI (1<<9)
+
+/* Control transfer TRB specific fields */
+#define TRB_DIR_IN (1<<16)
+#define TRB_TX_TYPE(p) ((p) << 16)
+#define TRB_DATA_OUT 2
+#define TRB_DATA_IN 3
+
+/* TRB bit mask in Data Stage TRB */
+#define TRB_SETUPID_BITMASK (0x300)
+#define TRB_SETUPID(p) ((p) << 8)
+#define TRB_SETUPID_TO_TYPE(p) (((p) & TRB_SETUPID_BITMASK) >> 8)
+
+#define TRB_SETUP_SPEEDID_USB3 0x1
+#define TRB_SETUP_SPEEDID_USB2 0x0
+#define TRB_SETUP_SPEEDID(p) ((p) & (1 << 7))
+
+#define TRB_SETUPSTAT_ACK 0x1
+#define TRB_SETUPSTAT_STALL 0x0
+#define TRB_SETUPSTAT(p) ((p) << 6)
+
+/* Isochronous TRB specific fields */
+#define TRB_SIA (1<<31)
+#define TRB_FRAME_ID(p) (((p) & 0x7ff) << 20)
+
+struct usbssp_generic_trb {
+ __le32 field[4];
+};
+
+union usbssp_trb {
+ struct usbssp_link_trb link;
+ struct usbssp_transfer_event trans_event;
+ struct usbssp_event_cmd event_cmd;
+ struct usbssp_generic_trb generic;
+};
+
+/* TRB bit mask */
+#define TRB_TYPE_BITMASK (0xfc00)
+#define TRB_TYPE(p) ((p) << 10)
+#define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10)
+/* TRB type IDs */
+/* bulk, interrupt, isoc scatter/gather, and control data stage */
+#define TRB_NORMAL 1
+/* setup stage for control transfers */
+#define TRB_SETUP 2
+
+/* data stage for control transfers */
+#define TRB_DATA 3
+/* status stage for control transfers */
+#define TRB_STATUS 4
+/* isoc transfers */
+#define TRB_ISOC 5
+/* TRB for linking ring segments */
+#define TRB_LINK 6
+#define TRB_EVENT_DATA 7
+/* Transfer Ring No-op (not for the command ring) */
+#define TRB_TR_NOOP 8
+/* Command TRBs */
+/* Enable Slot Command */
+#define TRB_ENABLE_SLOT 9
+/* Disable Slot Command */
+#define TRB_DISABLE_SLOT 10
+/* Address Device Command */
+#define TRB_ADDR_DEV 11
+/* Configure Endpoint Command */
+#define TRB_CONFIG_EP 12
+/* Evaluate Context Command */
+#define TRB_EVAL_CONTEXT 13
+/* Reset Endpoint Command */
+#define TRB_RESET_EP 14
+/* Stop Transfer Ring Command */
+#define TRB_STOP_RING 15
+/* Set Transfer Ring Dequeue Pointer Command */
+#define TRB_SET_DEQ 16
+/* Reset Device Command */
+#define TRB_RESET_DEV 17
+/* Force Event Command (opt) */
+#define TRB_FORCE_EVENT 18
+/* Set Latency Tolerance Value Command (opt) */
+#define TRB_SET_LT 20
+/* Force Header Command - generate a transaction or link management packet */
+#define TRB_FORCE_HEADER 22
+/* No-op Command - not for transfer rings */
+#define TRB_CMD_NOOP 23
+/* TRB IDs 24-31 reserved */
+/* Event TRBS */
+/* Transfer Event */
+#define TRB_TRANSFER 32
+/* Command Completion Event */
+#define TRB_COMPLETION 33
+/* Port Status Change Event */
+#define TRB_PORT_STATUS 34
+/* Doorbell Event (opt) */
+#define TRB_DOORBELL 36
+/* Device Controller Event */
+#define TRB_HC_EVENT 37
+/* Device Notification Event - device sent function wake notification */
+#define TRB_DEV_NOTE 38
+/* MFINDEX Wrap Event - microframe counter wrapped */
+#define TRB_MFINDEX_WRAP 39
+/* TRB IDs 40-47 reserved, 48-63 is vendor-defined */
+/* Halt Endpoint Command */
+#define TRB_HALT_ENDPOINT 54
+/* Flush Endpoint Command */
+#define TRB_FLUSH_ENDPOINT 58
+
+static inline const char *usbssp_trb_type_string(u8 type)
+{
+ switch (type) {
+ case TRB_NORMAL:
+ return "Normal";
+ case TRB_SETUP:
+ return "Setup Stage";
+ case TRB_DATA:
+ return "Data Stage";
+ case TRB_STATUS:
+ return "Status Stage";
+ case TRB_ISOC:
+ return "Isoch";
+ case TRB_LINK:
+ return "Link";
+ case TRB_EVENT_DATA:
+ return "Event Data";
+ case TRB_TR_NOOP:
+ return "No-Op";
+ case TRB_ENABLE_SLOT:
+ return "Enable Slot Command";
+ case TRB_DISABLE_SLOT:
+ return "Disable Slot Command";
+ case TRB_ADDR_DEV:
+ return "Address Device Command";
+ case TRB_CONFIG_EP:
+ return "Configure Endpoint Command";
+ case TRB_EVAL_CONTEXT:
+ return "Evaluate Context Command";
+ case TRB_RESET_EP:
+ return "Reset Endpoint Command";
+ case TRB_STOP_RING:
+ return "Stop Ring Command";
+ case TRB_SET_DEQ:
+ return "Set TR Dequeue Pointer Command";
+ case TRB_RESET_DEV:
+ return "Reset Device Command";
+ case TRB_FORCE_EVENT:
+ return "Force Event Command";
+ case TRB_SET_LT:
+ return "Set Latency Tolerance Value Command";
+ case TRB_FORCE_HEADER:
+ return "Force Header Command";
+ case TRB_CMD_NOOP:
+ return "No-Op Command";
+ case TRB_TRANSFER:
+ return "Transfer Event";
+ case TRB_COMPLETION:
+ return "Command Completion Event";
+ case TRB_PORT_STATUS:
+ return "Port Status Change Event";
+ case TRB_DOORBELL:
+ return "Doorbell Event";
+ case TRB_HC_EVENT:
+ return "Device Controller Event";
+ case TRB_DEV_NOTE:
+ return "Device Notification Event";
+ case TRB_MFINDEX_WRAP:
+ return "MFINDEX Wrap Event";
+ default:
+ return "UNKNOWN";
+ }
+}
+
+#define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
+/* Above, but for __le32 types -- can avoid work by swapping constants: */
+#define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
+ cpu_to_le32(TRB_TYPE(TRB_LINK)))
+#define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
+ cpu_to_le32(TRB_TYPE(TRB_TR_NOOP)))
+
+/*
+ * TRBS_PER_SEGMENT must be a multiple of 4,
+ * since the command ring is 64-byte aligned.
+ * It must also be greater than 16.
+ */
+#define TRBS_PER_SEGMENT 16 /*was 256 */
+/* Allow two commands + a link TRB, along with any reserved command TRBs */
+#define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3)
+#define TRB_SEGMENT_SIZE (TRBS_PER_SEGMENT*16)
+#define TRB_SEGMENT_SHIFT (ilog2(TRB_SEGMENT_SIZE))
+/* TRB buffer pointers can't cross 64KB boundaries */
+#define TRB_MAX_BUFF_SHIFT 16
+#define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT)
+/* How much data is left before the 64KB boundary? */
+#define TRB_BUFF_LEN_UP_TO_BOUNDARY(addr) (TRB_MAX_BUFF_SIZE - \
+ (addr & (TRB_MAX_BUFF_SIZE - 1)))
+
+struct usbssp_segment {
+ union usbssp_trb *trbs;
+ /* private to DC */
+ struct usbssp_segment *next;
+ dma_addr_t dma;
+ /* Max packet sized bounce buffer for td-fragmant alignment */
+ dma_addr_t bounce_dma;
+ void *bounce_buf;
+ unsigned int bounce_offs;
+ unsigned int bounce_len;
+};
+
+struct usbssp_td {
+ struct list_head td_list;
+ struct usbssp_request *priv_request;
+ struct usbssp_segment *start_seg;
+ union usbssp_trb *first_trb;
+ union usbssp_trb *last_trb;
+ struct usbssp_segment *bounce_seg;
+ /* actual_length of the request has already been set */
+ bool request_length_set;
+};
+
+
+/* DC command default timeout value */
+#define USBSSP_CMD_DEFAULT_TIMEOUT (5 * HZ)
+
+struct usbssp_dequeue_state {
+ struct usbssp_segment *new_deq_seg;
+ union usbssp_trb *new_deq_ptr;
+ int new_cycle_state;
+ unsigned int stream_id;
+};
+
+enum usbssp_ring_type {
+ TYPE_CTRL = 0,
+ TYPE_ISOC,
+ TYPE_BULK,
+ TYPE_INTR,
+ TYPE_STREAM,
+ TYPE_COMMAND,
+ TYPE_EVENT,
+};
+
+static inline const char *usbssp_ring_type_string(enum usbssp_ring_type type)
+{
+ switch (type) {
+ case TYPE_CTRL:
+ return "CTRL";
+ case TYPE_ISOC:
+ return "ISOC";
+ case TYPE_BULK:
+ return "BULK";
+ case TYPE_INTR:
+ return "INTR";
+ case TYPE_STREAM:
+ return "STREAM";
+ case TYPE_COMMAND:
+ return "CMD";
+ case TYPE_EVENT:
+ return "EVENT";
+ }
+
+ return "UNKNOWN";
+}
+struct usbssp_ring {
+ struct usbssp_segment *first_seg;
+ struct usbssp_segment *last_seg;
+ union usbssp_trb *enqueue;
+ struct usbssp_segment *enq_seg;
+ union usbssp_trb *dequeue;
+ struct usbssp_segment *deq_seg;
+ struct list_head td_list;
+ /*
+ * Write the cycle state into the TRB cycle field to give ownership of
+ * the TRB to the device controller (if we are the producer),
+ * or to check if we own the TRB (if we are the consumer).
+ */
+ u32 cycle_state;
+ unsigned int stream_id;
+ unsigned int num_segs;
+ unsigned int num_trbs_free;
+ unsigned int num_trbs_free_temp;
+ unsigned int bounce_buf_len;
+ enum usbssp_ring_type type;
+ bool last_td_was_short;
+ struct radix_tree_root *trb_address_map;
+};
+
+struct usbssp_erst_entry {
+ /* 64-bit event ring segment address */
+ __le64 seg_addr;
+ __le32 seg_size;
+ /* Set to zero */
+ __le32 rsvd;
+};
+
+struct usbssp_erst {
+ struct usbssp_erst_entry *entries;
+ unsigned int num_entries;
+ /* usbssp_udc->event_ring keeps track of segment dma addresses */
+ dma_addr_t erst_dma_addr;
+ /* Num entries the ERST can contain */
+ unsigned int erst_size;
+};
+
+struct usbssp_scratchpad {
+ u64 *sp_array;
+ dma_addr_t sp_dma;
+ void **sp_buffers;
+};
+
+struct usbssp_request {
+ /*number of TDs associated with this request*/
+ int num_tds;
+ /*number of actually handled TDs*/
+ int num_tds_done;
+ struct usbssp_td *td;
+
+ struct usb_request request;
+ struct list_head list;
+ struct usbssp_ep *dep;
+
+ struct scatterlist *sg;
+ unsigned int num_pending_sgs;
+ u8 epnum;
+ unsigned direction:1;
+ unsigned mapped:1;
+ uint32_t start_frame;
+ int stream_id;
+};
+
+
+/*
+ * Each segment table entry is 4*32bits long. 1K seems like an ok size:
+ * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
+ * meaning 64 ring segments.
+ * Initial allocated size of the ERST, in number of entries
+ */
+#define ERST_NUM_SEGS 1
+/* Initial allocated size of the ERST, in number of entries */
+#define ERST_SIZE 64
+/* Initial number of event segment rings allocated */
+#define ERST_ENTRIES 1
+/* Poll every 60 seconds */
+#define POLL_TIMEOUT 60
+
+
+struct s3_save {
+ u32 command;
+ u32 dev_nt;
+ u64 dcbaa_ptr;
+ u32 config_reg;
+ u32 irq_pending;
+ u32 irq_control;
+ u32 erst_size;
+ u64 erst_base;
+ u64 erst_dequeue;
+};
+
+enum usbssp_ep0_state {
+ USBSSP_EP0_UNCONNECTED = 0,
+ USBSSP_EP0_SETUP_PHASE,
+ USBSSP_EP0_DATA_PHASE,
+ USBSSP_EP0_STATUS_PHASE,
+};
+
+struct usbssp_ports {
+ u8 maj_rev;
+ u8 min_rev;
+ u32 *psi; /* array of protocol speed ID entries */
+ u8 psi_count;
+ u8 psi_uid_count;
+};
+
+struct usbssp_udc {
+ struct device *dev;
+ struct usb_gadget gadget;
+ struct usb_gadget_driver *gadget_driver;
+
+ unsigned int irq; /* irq allocated */
+ void __iomem *regs; /* device memory/io */
+ resource_size_t rsrc_start; /* memory/io resource start */
+ resource_size_t rsrc_len; /* memory/io resource length */
+ u8 msi_enabled;
+ /* USBSSP Registers */
+ struct usbssp_cap_regs __iomem *cap_regs;
+ struct usbssp_op_regs __iomem *op_regs;
+ struct usbssp_run_regs __iomem *run_regs;
+ struct usbssp_doorbell_array __iomem *dba;
+ /* current interrupter register set */
+ struct usbssp_intr_reg __iomem *ir_set;
+
+ /* Cached register copies of read-only USBSSP data */
+ __u32 hcs_params1;
+ __u32 hcs_params2;
+ __u32 hcs_params3;
+ __u32 hcc_params;
+ __u32 hcc_params2;
+
+ unsigned int num_endpoints;
+
+ u8 setupId;
+ u8 setup_speed;
+ enum usbssp_ep0_state ep0state;
+ /*three state or two state setup */
+ u8 ep0_expect_in;
+ struct usbssp_request usb_req_ep0_in;
+ u8 three_stage_setup;
+ u32 delayed_status;
+ /*temporary buffer for setup packet*/
+ struct usb_ctrlrequest setup;
+ void *setup_buf;
+ u8 device_address;
+ u8 bos_event_detected :1;
+
+ uint8_t defered_event;
+#define EVENT_DEV_CONNECTED 1
+#define EVENT_DEV_DISCONECTED 2
+#define EVENT_SETUP_PACKET 4
+#define EVENT_USB_RESET 8
+ int remote_wakeup_allowed;
+
+ spinlock_t lock;
+ spinlock_t irq_thread_lock;
+ unsigned long irq_thread_flag;
+
+ /* packed release number */
+ u16 hci_version;
+ u8 max_slots;
+ u8 max_interrupters;
+ u8 max_ports;
+ u8 isoc_threshold;
+ /* imod_interval in ns (I * 250ns) */
+ u32 imod_interval;
+
+ /*revision of current used port*/
+ u8 port_major_revision;
+ /* 4KB min, 128MB max */
+ int page_size;
+ /* Valid values are 12 to 20, inclusive */
+ int page_shift;
+ /* msi-x vectors */
+ int msix_count;
+ struct msix_entry *msix_entries;
+
+ /* data structures */
+ struct usbssp_device_context_array *dcbaa;
+ struct usbssp_ring *cmd_ring;
+ unsigned int cmd_ring_state;
+
+#define CMD_RING_STATE_RUNNING (1 << 0)
+#define CMD_RING_STATE_ABORTED (1 << 1)
+#define CMD_RING_STATE_STOPPED (1 << 2)
+
+ struct list_head cmd_list;
+ unsigned int cmd_ring_reserved_trbs;
+ struct delayed_work cmd_timer;
+ struct work_struct bottom_irq;
+ struct workqueue_struct *bottom_irq_wq;
+ struct completion cmd_ring_stop_completion;
+ struct usbssp_command *current_cmd;
+ struct usbssp_ring *event_ring;
+ struct usbssp_erst erst;
+ /* Scratchpad */
+ struct usbssp_scratchpad *scratchpad;
+
+ /* slot enabling and address device helpers */
+ /* these are not thread safe so use mutex */
+ struct mutex mutex;
+ int slot_id;
+
+ /* Internal mirror of the HW's dcbaa */
+ struct usbssp_device devs;
+
+ /* DMA pools */
+ struct dma_pool *device_pool;
+ struct dma_pool *segment_pool;
+ struct dma_pool *small_streams_pool;
+ struct dma_pool *medium_streams_pool;
+
+ unsigned int usbssp_state;
+
+ u32 command;
+ struct s3_save s3;
+
+ /* Device controller is dying - not responding to commands.
+ *
+ * DC interrupts have been disabled and a watchdog timer
+ * will (or has already) halt the device controller, and complete all
+ * requests with an -ESHUTDOWN code. Any code that sees this status
+ * (other than the timer that set it) should stop touching
+ * hardware immediately. Interrupt handlers should return
+ * immediately when they see this status.
+ */
+ #define USBSSP_STATE_DYING (1 << 0)
+ #define USBSSP_STATE_HALTED (1 << 1)
+ #define USBSSP_STATE_REMOVING (1 << 2)
+
+ #define USBSSP_STATE_DISCONNECT_PENDING (1 << 4)
+ #define USBSSP_STATE_DISCONNECTED (1 << 8)
+
+ unsigned int num_active_eps;
+
+ /* Is each DC port a USB 3.0, USB 2.0, or USB 1.1 port? */
+ u8 *port_array;
+ /* Pointers to USB 3.0 PORTSC registers */
+ __le32 __iomem *usb3_ports;
+ unsigned int num_usb3_ports;
+ /* Pointers to USB 2.0 PORTSC registers */
+ __le32 __iomem *usb2_ports;
+ unsigned int num_usb2_ports;
+ struct usbssp_ports usb2_rhub;
+ struct usbssp_ports usb3_rhub;
+ /* support software LPM */
+ unsigned sw_lpm_support:1;
+ /* support USB2 hardware LPM */
+ unsigned hw_lpm_support:1;
+ /* cached usb2 extended protocol capabilities */
+ u32 *ext_caps;
+ unsigned int num_ext_caps;
+
+ u32 port_suspended;
+ u32 port_remote_wakeup;
+ u16 test_mode;
+
+ struct dentry *debugfs_root;
+ struct dentry *debugfs_slots;
+ struct list_head regset_list;
+};
+
+#define GET_PORT_RRBESL(p) (((p) >> 17) & 0xf)
+#define PORT_RBESL(p) (((p) & 0xf) << 4)
+#define PORT_BESL_MASK (0xf << 4)
+#define PORT_HLE_MASK (1 << 6)
+
+#define PORT_L1S_HLE0_STALL 1
+
+#define USBSSP_CFC_DELAY 10
+
+#define usbssp_dbg(usbssp_data, fmt, args...) \
+ dev_dbg(usbssp_data->dev, fmt, ## args)
+
+#define usbssp_err(usbssp_data, fmt, args...) \
+ dev_err(usbssp_data->dev, fmt, ## args)
+
+#define usbssp_warn(usbssp_data, fmt, args...) \
+ dev_warn(usbssp_data->dev, fmt, ## args)
+
+#define usbssp_warn_ratelimited(usbssp_data, fmt, args...) \
+ dev_warn_ratelimited(usbssp_data->dev, fmt, ## args)
+
+#define usbssp_info(usbssp_data, fmt, args...) \
+ dev_info(usbssp_data->dev, fmt, ## args)
+
+/*
+ * Registers should always be accessed with double word or quad word accesses.
+ *
+ * Registers with 64-bit address pointers should be written to with
+ * dword accesses by writing the low dword first (ptr[0]), then the high dword
+ * (ptr[1]) second. DC implementations that do not support 64-bit address
+ * pointers will ignore the high dword, and write order is irrelevant.
+ */
+static inline u64 usbssp_read_64(const struct usbssp_udc *usbssp_data,
+ __le64 __iomem *regs)
+{
+ return lo_hi_readq(regs);
+}
+
+static inline void usbssp_write_64(struct usbssp_udc *usbssp_data,
+ const u64 val, __le64 __iomem *regs)
+{
+ lo_hi_writeq(val, regs);
+}
+
+/* USBSSP memory management */
+char *usbssp_get_slot_state(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx);
+void usbssp_dbg_trace(struct usbssp_udc *usbssp_data,
+ void (*trace)(struct va_format *),
+ const char *fmt, ...);
+
+/* USBSSP memory management */
+void usbssp_mem_cleanup(struct usbssp_udc *usbssp_data);
+int usbssp_mem_init(struct usbssp_udc *usbssp_data, gfp_t flags);
+void usbssp_free_priv_device(struct usbssp_udc *usbssp_data);
+int usbssp_alloc_priv_device(struct usbssp_udc *usbssp_data, gfp_t flags);
+
+int usbssp_setup_addressable_priv_dev(struct usbssp_udc *usbssp_data);
+void usbssp_copy_ep0_dequeue_into_input_ctx(struct usbssp_udc *usbssp_data);
+unsigned int usbssp_get_endpoint_index(const struct usb_endpoint_descriptor *desc);
+unsigned int usbssp_get_endpoint_address(unsigned int ep_index);
+unsigned int usbssp_get_endpoint_flag(const struct usb_endpoint_descriptor *desc);
+
+unsigned int usbssp_last_valid_endpoint(u32 added_ctxs);
+void usbssp_endpoint_zero(struct usbssp_udc *usbssp_data,
+ struct usbssp_device *dev_priv, struct usbssp_ep *ep);
+void usbssp_endpoint_copy(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *in_ctx,
+ struct usbssp_container_ctx *out_ctx,
+ unsigned int ep_index);
+void usbssp_slot_copy(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *in_ctx,
+ struct usbssp_container_ctx *out_ctx);
+int usbssp_endpoint_init(struct usbssp_udc *usbssp_data,
+ struct usbssp_device *dev_priv,
+ struct usbssp_ep *dep,
+ gfp_t mem_flags);
+
+void usbssp_ring_free(struct usbssp_udc *usbssp_data, struct usbssp_ring *ring);
+int usbssp_ring_expansion(struct usbssp_udc *usbssp_data,
+ struct usbssp_ring *ring, unsigned int num_trbs, gfp_t flags);
+void usbssp_free_endpoint_ring(struct usbssp_udc *usbssp_data,
+ struct usbssp_device *dev_priv,
+ unsigned int ep_index);
+void usbssp_free_stream_info(struct usbssp_udc *usbssp_data,
+ struct usbssp_stream_info *stream_info);
+struct usbssp_ring *usbssp_dma_to_transfer_ring(
+ struct usbssp_ep *ep,
+ u64 address);
+struct usbssp_ring *usbssp_stream_id_to_ring(
+ struct usbssp_device *dev,
+ unsigned int ep_index,
+ unsigned int stream_id);
+
+struct usbssp_command *usbssp_alloc_command(struct usbssp_udc *usbssp_data,
+ bool allocate_completion, gfp_t mem_flags);
+struct usbssp_command *usbssp_alloc_command_with_ctx(
+ struct usbssp_udc *usbssp_data,
+ bool allocate_completion, gfp_t mem_flags);
+void usbssp_request_free_priv(struct usbssp_request *req_priv);
+void usbssp_free_command(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *command);
+
+struct usbssp_container_ctx *usbssp_alloc_container_ctx(
+ struct usbssp_udc *usbssp_data,
+ int type, gfp_t flags);
+void usbssp_free_container_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx);
+
+/* USBSSP Device controller glue */
+void usbssp_bottom_irq(struct work_struct *work);
+int usbssp_init(struct usbssp_udc *usbssp_data);
+void usbssp_stop(struct usbssp_udc *usbssp_data);
+int usbssp_handshake(void __iomem *ptr, u32 mask, u32 done, int usec);
+void usbssp_quiesce(struct usbssp_udc *usbssp_data);
+int usbssp_halt(struct usbssp_udc *usbssp_data);
+int usbssp_start(struct usbssp_udc *usbssp_data);
+extern int usbssp_reset(struct usbssp_udc *usbssp_data);
+int usbssp_run(struct usbssp_udc *usbssp_data);
+int usbssp_gen_setup(struct usbssp_udc *usbssp_data);
+int usbssp_disable_slot(struct usbssp_udc *usbssp_data);
+
+int usbssp_suspend(struct usbssp_udc *usbssp_data, bool do_wakeup);
+int usbssp_resume(struct usbssp_udc *usbssp_data, bool hibernated);
+
+int usbssp_get_frame(struct usbssp_udc *usbssp_data);
+irqreturn_t usbssp_irq(int irq, void *priv);
+
+irqreturn_t usbssp_msi_irq(int irq, void *usbssp_data);
+
+int usbssp_alloc_dev(struct usbssp_udc *usbssp_data);
+void usbssp_free_dev(struct usbssp_udc *usbssp_data);
+
+int usbssp_address_device(struct usbssp_udc *usbssp_data);
+int usbssp_enable_device(struct usbssp_udc *usbssp_data);
+
+int usbssp_set_usb2_hardware_lpm(struct usbssp_udc *usbsssp_data,
+ struct usb_request *req, int enable);
+
+/* USBSSP ring, segment, TRB, and TD functions */
+dma_addr_t usbssp_trb_virt_to_dma(struct usbssp_segment *seg,
+ union usbssp_trb *trb);
+struct usbssp_segment *usbssp_trb_in_td(struct usbssp_udc *usbssp_data,
+ struct usbssp_segment *start_seg,
+ union usbssp_trb *start_trb, union usbssp_trb *end_trb,
+ dma_addr_t suspect_dma, bool debug);
+
+int usbssp_is_vendor_info_code(struct usbssp_udc *usbssp_data,
+ unsigned int trb_comp_code);
+void usbssp_ring_cmd_db(struct usbssp_udc *usbssp_data);
+int usbssp_queue_slot_control(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd, u32 trb_type);
+int usbssp_queue_address_device(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd,
+ dma_addr_t in_ctx_ptr, enum usbssp_setup_dev setup);
+
+void usbssp_queue_force_header_erdy(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index);
+
+int usbssp_queue_vendor_command(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd,
+ u32 field1, u32 field2, u32 field3, u32 field4);
+
+int usbssp_queue_stop_endpoint(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd,
+ unsigned int ep_index, int suspend);
+int usbssp_queue_ctrl_tx(struct usbssp_udc *usbssp_data, gfp_t mem_flags,
+ struct usbssp_request *req_priv, unsigned int ep_index);
+
+int usbssp_queue_bulk_tx(struct usbssp_udc *usbssp_data, gfp_t mem_flags,
+ struct usbssp_request *req_priv, unsigned int ep_index);
+int usbssp_queue_intr_tx(struct usbssp_udc *usbssp_data, gfp_t mem_flags,
+ struct usbssp_request *req_priv, unsigned int ep_index);
+int usbssp_queue_isoc_tx_prepare(
+ struct usbssp_udc *usbssp_data, gfp_t mem_flags,
+ struct usbssp_request *req_priv, unsigned int ep_index);
+int usbssp_queue_configure_endpoint(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd, dma_addr_t in_ctx_ptr,
+ bool command_must_succeed);
+int usbssp_queue_evaluate_context(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd,
+ dma_addr_t in_ctx_ptr, bool command_must_succeed);
+int usbssp_queue_reset_ep(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd,
+ unsigned int ep_index, enum usbssp_ep_reset_type reset_type);
+int usbssp_queue_nop(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd);
+void usbssp_cleanup_halted_endpoint(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index,
+ unsigned int stream_id,
+ struct usbssp_td *td,
+ enum usbssp_ep_reset_type reset_type);
+int usbssp_queue_halt_endpoint(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd,
+ unsigned int ep_index);
+int usbssp_queue_reset_device(struct usbssp_udc *usbssp_data,
+ struct usbssp_command *cmd);
+void usbssp_find_new_dequeue_state(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index,
+ unsigned int stream_id, struct usbssp_td *cur_td,
+ struct usbssp_dequeue_state *state);
+void usbssp_queue_new_dequeue_state(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index,
+ struct usbssp_dequeue_state *deq_state);
+void usbssp_cleanup_stalled_ring(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index, unsigned int stream_id,
+ struct usbssp_td *td);
+void usbssp_stop_endpoint_command_watchdog(struct timer_list *t);
+void usbssp_handle_command_timeout(struct work_struct *work);
+
+void usbssp_ring_ep_doorbell(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index, unsigned int stream_id);
+void usbssp_cleanup_command_queue(struct usbssp_udc *usbssp_data);
+void inc_deq(struct usbssp_udc *usbssp_data, struct usbssp_ring *ring);
+unsigned int count_trbs(u64 addr, u64 len);
+
+/* USBSSP port code */
+void usbssp_set_link_state(struct usbssp_udc *usbssp_data,
+ __le32 __iomem *port_regs, u32 link_state);
+
+void usbssp_test_and_clear_bit(struct usbssp_udc *usbssp_data,
+ __le32 __iomem *port_regs, u32 port_bit);
+
+void usbssp_udc_died(struct usbssp_udc *usbssp_data);
+
+#ifdef CONFIG_PM
+int usbssp_bus_suspend(struct usbssp_udc *usbssp_data);
+int usbssp_bus_resume(struct usbssp_udc *usbssp_data);
+#else
+#define usbssp_bus_suspend NULL
+#define usbssp_bus_resume NULL
+#endif /* CONFIG_PM */
+u32 usbssp_port_state_to_neutral(u32 state);
+
+/* USBSSP DC contexts */
+struct usbssp_input_control_ctx *usbssp_get_input_control_ctx(
+ struct usbssp_container_ctx *ctx);
+struct usbssp_slot_ctx *usbssp_get_slot_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx);
+struct usbssp_ep_ctx *usbssp_get_ep_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx, unsigned int ep_index);
+struct usbssp_ring *usbssp_triad_to_transfer_ring(struct usbssp_udc
+ *usbssp_data, unsigned int ep_index, unsigned int stream_id);
+
+/* USBSSP debugging */
+void usbssp_print_trb_offsets(struct usbssp_udc *usbssp_data,
+ union usbssp_trb *trb);
+void usbssp_print_ir_set(struct usbssp_udc *usbssp_data, int set_num);
+void usbssp_print_registers(struct usbssp_udc *usbssp_data);
+void usbssp_dbg_regs(struct usbssp_udc *usbssp_data);
+void usbssp_print_run_regs(struct usbssp_udc *usbssp_data);
+void usbssp_debug_trb(struct usbssp_udc *usbssp_data, union usbssp_trb *trb);
+void usbssp_debug_segment(struct usbssp_udc *usbssp_data,
+ struct usbssp_segment *seg);
+void usbssp_debug_ring(struct usbssp_udc *usbssp_data,
+ struct usbssp_ring *ring);
+void usbssp_dbg_erst(struct usbssp_udc *usbssp_data, struct usbssp_erst *erst);
+void usbssp_dbg_cmd_ptrs(struct usbssp_udc *usbssp_data);
+void usbssp_dbg_ring_ptrs(struct usbssp_udc *usbssp_data,
+ struct usbssp_ring *ring);
+void usbssp_dbg_ctx(struct usbssp_udc *usbssp_data,
+ struct usbssp_container_ctx *ctx, unsigned int last_ep);
+
+void usbssp_dbg_ep_rings(struct usbssp_udc *usbssp_data,
+ unsigned int ep_index, struct usbssp_ep *ep);
+
+void usbssp_dbg_trace(struct usbssp_udc *usbssp_data,
+ void (*trace)(struct va_format *),
+ const char *fmt, ...);
+
+/* USBSSP gadget interface*/
+void usbssp_suspend_gadget(struct usbssp_udc *usbssp_data);
+void usbssp_resume_gadget(struct usbssp_udc *usbssp_data);
+int usbssp_gadget_init(struct usbssp_udc *usbssp_data);
+int usbssp_gadget_exit(struct usbssp_udc *usbssp_data);
+void usbssp_gadget_free_endpoint(struct usbssp_udc *usbssp_data);
+int usbssp_gadget_init_endpoint(struct usbssp_udc *usbssp_data);
+void usbssp_gadget_giveback(struct usbssp_ep *ep_priv,
+ struct usbssp_request *req_priv, int status);
+int usbssp_enqueue(struct usbssp_ep *dep, struct usbssp_request *req_priv);
+int usbssp_dequeue(struct usbssp_ep *dep, struct usbssp_request *req_priv);
+unsigned int usbssp_port_speed(unsigned int port_status);
+void usbssp_gadget_reset_interrupt(struct usbssp_udc *usbssp_data);
+void usbssp_gadget_disconnect_interrupt(struct usbssp_udc *usbssp_data);
+int usbssp_stop_device(struct usbssp_udc *usbssp_data, int suspend);
+int usbssp_halt_endpoint(struct usbssp_udc *usbssp_data,
+ struct usbssp_ep *dep, int value);
+int usbssp_cmd_stop_ep(struct usbssp_udc *usbssp_data, struct usb_gadget *g,
+ struct usbssp_ep *ep_priv);
+int usbssp_enter_test_mode(struct usbssp_udc *usbssp_data,
+ u16 test_mode, unsigned long *flags);
+int usbssp_exit_test_mode(struct usbssp_udc *usbssp_data);
+int usbssp_setup_analyze(struct usbssp_udc *usbssp_data);
+int usbssp_data_complete(struct usbssp_udc *usbssp_data,
+ struct usbssp_transfer_event *event);
+int usbssp_status_complete(struct usbssp_udc *usbssp_data,
+ struct usbssp_transfer_event *event);
+
+int usbssp_status_stage(struct usbssp_udc *usbssp_data);
+
+void usbssp_kill_endpoint_request(struct usbssp_udc *usbssp_data,
+ int ep_index);
+int usbssp_add_endpoint(struct usbssp_udc *usbssp_data, struct usbssp_ep *dep);
+int usbssp_drop_endpoint(struct usbssp_udc *usbssp_data, struct usb_gadget *g,
+ struct usbssp_ep *dep);
+int usbssp_reset_device(struct usbssp_udc *usbssp_data);
+int usbssp_check_bandwidth(struct usbssp_udc *usbssp_data,
+ struct usb_gadget *g);
+void usbssp_reset_bandwidth(struct usbssp_udc *usbssp_data,
+ struct usb_gadget *g);
+
+static inline struct usbssp_ring *usbssp_request_to_transfer_ring(
+ struct usbssp_udc *usbssp_data, struct usbssp_request *req_priv)
+{
+ return usbssp_triad_to_transfer_ring(usbssp_data,
+ usbssp_get_endpoint_index(req_priv->dep->endpoint.desc),
+ req_priv->request.stream_id);
+}
+
+
+static inline char *usbssp_slot_state_string(u32 state)
+{
+ switch (state) {
+ case SLOT_STATE_ENABLED:
+ return "enabled/disabled";
+ case SLOT_STATE_DEFAULT:
+ return "default";
+ case SLOT_STATE_ADDRESSED:
+ return "addressed";
+ case SLOT_STATE_CONFIGURED:
+ return "configured";
+ default:
+ return "reserved";
+ }
+}
+
+static inline const char *usbssp_decode_trb(u32 field0, u32 field1, u32 field2,
+ u32 field3)
+{
+ static char str[256];
+ int type = TRB_FIELD_TO_TYPE(field3);
+
+ switch (type) {
+ case TRB_LINK:
+ sprintf(str,
+ "LINK %08x%08x intr %d type '%s' flags %c:%c:%c:%c",
+ field1, field0, GET_INTR_TARGET(field2),
+ usbssp_trb_type_string(type),
+ field3 & TRB_IOC ? 'I' : 'i',
+ field3 & TRB_CHAIN ? 'C' : 'c',
+ field3 & TRB_TC ? 'T' : 't',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_TRANSFER:
+ case TRB_COMPLETION:
+ case TRB_PORT_STATUS:
+ case TRB_DOORBELL:
+ case TRB_HC_EVENT:
+ case TRB_DEV_NOTE:
+ case TRB_MFINDEX_WRAP:
+ sprintf(str,
+ "TRB %08x%08x status '%s' len %d slot %d ep %d:=:"
+ "type '%s' flags %c:%c",
+ field1, field0,
+ usbssp_trb_comp_code_string(GET_COMP_CODE(field2)),
+ EVENT_TRB_LEN(field2), TRB_TO_SLOT_ID(field3),
+ /* Macro decrements 1, maybe it shouldn't?!? */
+ TRB_TO_EP_INDEX(field3) + 1,
+ usbssp_trb_type_string(type),
+ field3 & EVENT_DATA ? 'E' : 'e',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+
+ break;
+ case TRB_SETUP:
+ sprintf(str, "bRequestType %02x bRequest %02x wValue %02x%02x "
+ "wIndex %02x%02x wLength %d length %d "
+ "TD size %d intr %d type '%s' flags %c:%c:%c",
+ field0 & 0xff,
+ (field0 & 0xff00) >> 8,
+ (field0 & 0xff000000) >> 24,
+ (field0 & 0xff0000) >> 16,
+ (field1 & 0xff00) >> 8,
+ field1 & 0xff,
+ (field1 & 0xff000000) >> 16 |
+ (field1 & 0xff0000) >> 16,
+ TRB_LEN(field2), GET_TD_SIZE(field2),
+ GET_INTR_TARGET(field2),
+ usbssp_trb_type_string(type),
+ field3 & TRB_IDT ? 'I' : 'i',
+ field3 & TRB_IOC ? 'I' : 'i',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_DATA:
+ sprintf(str, "Buffer %08x%08x length %d TD size %d intr %d "
+ "type '%s' flags %c:%c:%c:%c:%c:%c:%c",
+ field1, field0, TRB_LEN(field2),
+ GET_TD_SIZE(field2),
+ GET_INTR_TARGET(field2),
+ usbssp_trb_type_string(type),
+ field3 & TRB_IDT ? 'I' : 'i',
+ field3 & TRB_IOC ? 'I' : 'i',
+ field3 & TRB_CHAIN ? 'C' : 'c',
+ field3 & TRB_NO_SNOOP ? 'S' : 's',
+ field3 & TRB_ISP ? 'I' : 'i',
+ field3 & TRB_ENT ? 'E' : 'e',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_STATUS:
+ sprintf(str, "Buffer %08x%08x length %d TD size %d intr"
+ "%d type '%s' flags %c:%c:%c:%c",
+ field1, field0, TRB_LEN(field2),
+ GET_TD_SIZE(field2),
+ GET_INTR_TARGET(field2),
+ usbssp_trb_type_string(type),
+ field3 & TRB_IOC ? 'I' : 'i',
+ field3 & TRB_CHAIN ? 'C' : 'c',
+ field3 & TRB_ENT ? 'E' : 'e',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_NORMAL:
+ case TRB_ISOC:
+ case TRB_EVENT_DATA:
+ case TRB_TR_NOOP:
+ sprintf(str,
+ "Buffer %08x%08x length %d TD size %d intr %d "
+ "type '%s' flags %c:%c:%c:%c:%c:%c:%c:%c",
+ field1, field0, TRB_LEN(field2), GET_TD_SIZE(field2),
+ GET_INTR_TARGET(field2),
+ usbssp_trb_type_string(type),
+ field3 & TRB_BEI ? 'B' : 'b',
+ field3 & TRB_IDT ? 'I' : 'i',
+ field3 & TRB_IOC ? 'I' : 'i',
+ field3 & TRB_CHAIN ? 'C' : 'c',
+ field3 & TRB_NO_SNOOP ? 'S' : 's',
+ field3 & TRB_ISP ? 'I' : 'i',
+ field3 & TRB_ENT ? 'E' : 'e',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+
+ case TRB_CMD_NOOP:
+ case TRB_ENABLE_SLOT:
+ sprintf(str,
+ "%s: flags %c",
+ usbssp_trb_type_string(type),
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_DISABLE_SLOT:
+ sprintf(str,
+ "%s: slot %d flags %c",
+ usbssp_trb_type_string(type),
+ TRB_TO_SLOT_ID(field3),
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_ADDR_DEV:
+ sprintf(str,
+ "%s: ctx %08x%08x slot %d flags %c:%c",
+ usbssp_trb_type_string(type),
+ field1, field0,
+ TRB_TO_SLOT_ID(field3),
+ field3 & TRB_BSR ? 'B' : 'b',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_CONFIG_EP:
+ sprintf(str,
+ "%s: ctx %08x%08x slot %d flags %c:%c",
+ usbssp_trb_type_string(type),
+ field1, field0,
+ TRB_TO_SLOT_ID(field3),
+ field3 & TRB_DC ? 'D' : 'd',
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_EVAL_CONTEXT:
+ sprintf(str,
+ "%s: ctx %08x%08x slot %d flags %c",
+ usbssp_trb_type_string(type),
+ field1, field0,
+ TRB_TO_SLOT_ID(field3),
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_RESET_EP:
+ sprintf(str,
+ "%s: ctx %08x%08x slot %d ep %d flags %c",
+ usbssp_trb_type_string(type),
+ field1, field0,
+ TRB_TO_SLOT_ID(field3),
+ /* Macro decrements 1, maybe it shouldn't?!? */
+ TRB_TO_EP_INDEX(field3) + 1,
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_STOP_RING:
+ sprintf(str,
+ "%s: slot %d sp %d ep %d flags %c",
+ usbssp_trb_type_string(type),
+ TRB_TO_SLOT_ID(field3),
+ TRB_TO_SUSPEND_PORT(field3),
+ /* Macro decrements 1, maybe it shouldn't?!? */
+ TRB_TO_EP_INDEX(field3) + 1,
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_SET_DEQ:
+ sprintf(str,
+ "%s: deq %08x%08x stream %d slot %d ep %d flags %c",
+ usbssp_trb_type_string(type),
+ field1, field0,
+ TRB_TO_STREAM_ID(field2),
+ TRB_TO_SLOT_ID(field3),
+ /* Macro decrements 1, maybe it shouldn't?!? */
+ TRB_TO_EP_INDEX(field3) + 1,
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_RESET_DEV:
+ sprintf(str,
+ "%s: slot %d flags %c",
+ usbssp_trb_type_string(type),
+ TRB_TO_SLOT_ID(field3),
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_FORCE_EVENT:
+ sprintf(str,
+ "%s: event %08x%08x vf intr %d vf id %d flags %c",
+ usbssp_trb_type_string(type),
+ field1, field0,
+ TRB_TO_VF_INTR_TARGET(field2),
+ TRB_TO_VF_ID(field3),
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_SET_LT:
+ sprintf(str,
+ "%s: belt %d flags %c",
+ usbssp_trb_type_string(type),
+ TRB_TO_BELT(field3),
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ case TRB_FORCE_HEADER:
+ sprintf(str,
+ "%s: info %08x%08x%08x pkt type %d roothub port %d flags %c",
+ usbssp_trb_type_string(type),
+ field2, field1, field0 & 0xffffffe0,
+ TRB_TO_PACKET_TYPE(field0),
+ TRB_TO_DEV_PORT(field3),
+ field3 & TRB_CYCLE ? 'C' : 'c');
+ break;
+ default:
+ sprintf(str,
+ "type '%s' -> raw %08x %08x %08x %08x",
+ usbssp_trb_type_string(type),
+ field0, field1, field2, field3);
+ }
+
+ return str;
+}
+
+static inline const char *usbssp_decode_slot_context(u32 info, u32 info2,
+ u32 int_target, u32 state)
+{
+ static char str[1024];
+ u32 speed;
+ int ret = 0;
+
+ speed = info & DEV_SPEED;
+
+ ret = sprintf(str, "%s Ctx Entries %d MEL %d us",
+ ({ char *s;
+ switch (speed) {
+ case SLOT_SPEED_FS:
+ s = "full-speed";
+ break;
+ case SLOT_SPEED_LS:
+ s = "low-speed";
+ break;
+ case SLOT_SPEED_HS:
+ s = "high-speed";
+ break;
+ case SLOT_SPEED_SS:
+ s = "super-speed";
+ break;
+ case SLOT_SPEED_SSP:
+ s = "super-speed plus";
+ break;
+ default:
+ s = "UNKNOWN speed";
+ } s; }),
+ (info & LAST_CTX_MASK) >> 27,
+ info2 & MAX_EXIT);
+
+ ret += sprintf(str + ret, " [Intr %d] Addr %d State %s",
+ GET_INTR_TARGET(int_target),
+ state & DEV_ADDR_MASK,
+ usbssp_slot_state_string(GET_SLOT_STATE(state)));
+
+ return str;
+}
+
+
+static inline const char *usbssp_portsc_link_state_string(u32 portsc)
+{
+ switch (portsc & PORT_PLS_MASK) {
+ case XDEV_U0:
+ return "U0";
+ case XDEV_U1:
+ return "U1";
+ case XDEV_U2:
+ return "U2";
+ case XDEV_U3:
+ return "U3";
+ case XDEV_DISABLED:
+ return "Disabled";
+ case XDEV_RXDETECT:
+ return "RxDetect";
+ case XDEV_INACTIVE:
+ return "Inactive";
+ case XDEV_POLLING:
+ return "Polling";
+ case XDEV_RECOVERY:
+ return "Recovery";
+ case XDEV_HOT_RESET:
+ return "Hot Reset";
+ case XDEV_COMP_MODE:
+ return "Compliance mode";
+ case XDEV_TEST_MODE:
+ return "Test mode";
+ case XDEV_RESUME:
+ return "Resume";
+ default:
+ break;
+ }
+ return "Unknown";
+}
+
+static inline const char *usbssp_decode_portsc(u32 portsc)
+{
+ static char str[256];
+ int ret;
+
+ ret = sprintf(str, "%s %s %s Link:%s PortSpeed:%d ",
+ portsc & PORT_POWER ? "Powered" : "Powered-off",
+ portsc & PORT_CONNECT ? "Connected" : "Not-connected",
+ portsc & PORT_PE ? "Enabled" : "Disabled",
+ usbssp_portsc_link_state_string(portsc),
+ DEV_PORT_SPEED(portsc));
+
+ if (portsc & PORT_OC)
+ ret += sprintf(str + ret, "OverCurrent ");
+ if (portsc & PORT_RESET)
+ ret += sprintf(str + ret, "In-Reset ");
+
+ ret += sprintf(str + ret, "Change: ");
+ if (portsc & PORT_CSC)
+ ret += sprintf(str + ret, "CSC ");
+ if (portsc & PORT_PEC)
+ ret += sprintf(str + ret, "PEC ");
+ if (portsc & PORT_WRC)
+ ret += sprintf(str + ret, "WRC ");
+ if (portsc & PORT_OCC)
+ ret += sprintf(str + ret, "OCC ");
+ if (portsc & PORT_RC)
+ ret += sprintf(str + ret, "PRC ");
+ if (portsc & PORT_PLC)
+ ret += sprintf(str + ret, "PLC ");
+ if (portsc & PORT_CEC)
+ ret += sprintf(str + ret, "CEC ");
+ ret += sprintf(str + ret, "Wake: ");
+ if (portsc & PORT_WKCONN_E)
+ ret += sprintf(str + ret, "WCE ");
+ if (portsc & PORT_WKDISC_E)
+ ret += sprintf(str + ret, "WDE ");
+ if (portsc & PORT_WKOC_E)
+ ret += sprintf(str + ret, "WOE ");
+
+ return str;
+}
+
+static inline const char *usbssp_ep_state_string(u8 state)
+{
+ switch (state) {
+ case EP_STATE_DISABLED:
+ return "disabled";
+ case EP_STATE_RUNNING:
+ return "running";
+ case EP_STATE_HALTED:
+ return "halted";
+ case EP_STATE_STOPPED:
+ return "stopped";
+ case EP_STATE_ERROR:
+ return "error";
+ default:
+ return "INVALID";
+ }
+}
+
+static inline const char *usbssp_ep_type_string(u8 type)
+{
+ switch (type) {
+ case ISOC_OUT_EP:
+ return "Isoc OUT";
+ case BULK_OUT_EP:
+ return "Bulk OUT";
+ case INT_OUT_EP:
+ return "Int OUT";
+ case CTRL_EP:
+ return "Ctrl";
+ case ISOC_IN_EP:
+ return "Isoc IN";
+ case BULK_IN_EP:
+ return "Bulk IN";
+ case INT_IN_EP:
+ return "Int IN";
+ default:
+ return "INVALID";
+ }
+}
+
+static inline const char *usbssp_decode_ep_context(u32 info, u32 info2, u64 deq,
+ u32 tx_info)
+{
+ static char str[1024];
+ int ret;
+
+ u32 esit;
+ u16 maxp;
+ u16 avg;
+
+ u8 max_pstr;
+ u8 ep_state;
+ u8 interval;
+ u8 ep_type;
+ u8 burst;
+ u8 cerr;
+ u8 mult;
+
+ bool lsa;
+ bool hid;
+
+ esit = CTX_TO_MAX_ESIT_PAYLOAD_HI(info) << 16 |
+ CTX_TO_MAX_ESIT_PAYLOAD(tx_info);
+
+ ep_state = info & EP_STATE_MASK;
+ max_pstr = CTX_TO_EP_MAXPSTREAMS(info);
+ interval = CTX_TO_EP_INTERVAL(info);
+ mult = CTX_TO_EP_MULT(info) + 1;
+ lsa = !!(info & EP_HAS_LSA);
+
+ cerr = (info2 & (3 << 1)) >> 1;
+ ep_type = CTX_TO_EP_TYPE(info2);
+ hid = !!(info2 & (1 << 7));
+ burst = CTX_TO_MAX_BURST(info2);
+ maxp = MAX_PACKET_DECODED(info2);
+
+ avg = EP_AVG_TRB_LENGTH(tx_info);
+
+ ret = sprintf(str, "State %s mult %d max P. Streams %d %s",
+ usbssp_ep_state_string(ep_state), mult,
+ max_pstr, lsa ? "LSA " : "");
+
+ ret += sprintf(str + ret, "interval %d us max ESIT payload %d CErr %d ",
+ (1 << interval) * 125, esit, cerr);
+
+ ret += sprintf(str + ret, "Type %s %sburst %d maxp %d deq %016llx ",
+ usbssp_ep_type_string(ep_type), hid ? "HID" : "",
+ burst, maxp, deq);
+
+ ret += sprintf(str + ret, "avg trb len %d", avg);
+
+ return str;
+}
+
+/**
+ * next_request - gets the next request on the given list
+ * @list: the request list to operate on
+ *
+ * Caller should take care of locking. This function return %NULL or the first
+ * request available on @list.
+ */
+static inline struct usbssp_request *next_request(struct list_head *list)
+{
+ return list_first_entry_or_null(list, struct usbssp_request, list);
+}
+
+struct usbssp_udc;
+#define to_usbssp_ep(ep) (container_of(ep, struct usbssp_ep, endpoint))
+#define gadget_to_usbssp(g) (container_of(g, struct usbssp_udc, gadget))
+#define request_to_usbssp_request(r) (container_of(r, struct usbssp_request, request))
+
+#define to_usbssp_request(r) (container_of(r, struct usbssp_request, request))
+
+__le32 __iomem *usbssp_get_port_io_addr(struct usbssp_udc *usbssp_data);
+
+void usbssp_giveback_request_in_irq(struct usbssp_udc *usbssp_data,
+ struct usbssp_td *cur_td, int status);
+
+void usbssp_remove_request(struct usbssp_udc *usbssp_data,
+ struct usbssp_request *req_priv, int ep_index);
+
+#endif /* __LINUX_USBSSP_GADGET_H */
--
2.17.1
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