/* SPDX-License-Identifier: GPL-2.0+ */
/*
* USB HOST XHCI Controller
*
* Based on xHCI host controller driver in linux-kernel
* by Sarah Sharp.
*
* Copyright (C) 2008 Intel Corp.
* Author: Sarah Sharp
*
* Copyright (C) 2013 Samsung Electronics Co.Ltd
* Authors: Vivek Gautam <gautam.vivek@samsung.com>
* Vikas Sajjan <vikas.sajjan@samsung.com>
*/
#ifndef HOST_XHCI_H_
#define HOST_XHCI_H_
#include <asm/types.h>
#include <io.h>
#include <io-64-nonatomic-lo-hi.h>
#include <linux/list.h>
#define MAX_EP_CTX_NUM 31
#define XHCI_ALIGNMENT 64
/* Generic timeout for XHCI events */
#define XHCI_TIMEOUT 5000
/* Max number of USB devices for any host controller - limit in section 6.1 */
#define MAX_HC_SLOTS 256
/* Section 5.3.3 - MaxPorts */
#define MAX_HC_PORTS 255
/* Up to 16 ms to halt an HC */
#define XHCI_MAX_HALT_USEC (16*1000)
#define XHCI_MAX_RESET_USEC (250*1000)
/*
* These bits are Read Only (RO) and should be saved and written to the
* registers: 0, 3, 10:13, 30
* connect status, over-current status, port speed, and device removable.
* connect status and port speed are also sticky - meaning they're in
* the AUX well and they aren't changed by a hot, warm, or cold reset.
*/
#define XHCI_PORT_RO ((1 << 0) | (1 << 3) | (0xf << 10) | (1 << 30))
/*
* These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
* bits 5:8, 9, 14:15, 25:27
* link state, port power, port indicator state, "wake on" enable state
*/
#define XHCI_PORT_RWS ((0xf << 5) | (1 << 9) | (0x3 << 14) | (0x7 << 25))
/*
* These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
* bit 4 (port reset)
*/
#define XHCI_PORT_RW1S ((1 << 4))
/*
* These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
* bits 1, 17, 18, 19, 20, 21, 22, 23
* port enable/disable, and
* change bits: connect, PED,
* warm port reset changed (reserved zero for USB 2.0 ports),
* over-current, reset, link state, and L1 change
*/
#define XHCI_PORT_RW1CS ((1 << 1) | (0x7f << 17))
/*
* Bit 16 is RW, and writing a '1' to it causes the link state control to be
* latched in
*/
#define XHCI_PORT_RW ((1 << 16))
/*
* These bits are Reserved Zero (RsvdZ) and zero should be written to them:
* bits 2, 24, 28:31
*/
#define XHCI_PORT_RZ ((1 << 2) | (1 << 24) | (0xf << 28))
/*
* XHCI Register Space.
*/
struct xhci_hccr {
uint32_t cr_capbase;
uint32_t cr_hcsparams1;
uint32_t cr_hcsparams2;
uint32_t cr_hcsparams3;
uint32_t cr_hccparams;
uint32_t cr_dboff;
uint32_t cr_rtsoff;
/* hc_capbase bitmasks */
/* bits 7:0 - how long is the Capabilities register */
#define HC_LENGTH(p) XHCI_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_SHIFT 24
#define HCS_MAX_PORTS_MASK (0xff << HCS_MAX_PORTS_SHIFT)
#define HCS_MAX_PORTS(p) (((p) >> 24) & 0xff)
/* HCSPARAMS2 - hcs_params2 - bitmasks */
/* bits 0:3, frames or uframes that SW needs to queue transactions
* ahead of the HW to meet periodic deadlines */
#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: HC can use 64-bit address pointers */
#define HCC_64BIT_ADDR(p) ((p) & (1 << 0))
/* true: HC can do bandwidth negotiation */
#define HCC_BANDWIDTH_NEG(p) ((p) & (1 << 1))
/* true: HC uses 64-byte Device Context structures
* FIXME 64-byte context structures aren't supported yet.
*/
#define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2))
/* true: HC has port power switches */
#define HCC_PPC(p) ((p) & (1 << 3))
/* true: HC has port indicators */
#define HCS_INDICATOR(p) ((p) & (1 << 4))
/* true: HC has Light HC Reset Capability */
#define HCC_LIGHT_RESET(p) ((p) & (1 << 5))
/* true: HC supports latency tolerance messaging */
#define HCC_LTC(p) ((p) & (1 << 6))
/* true: no secondary Stream ID Support */
#define HCC_NSS(p) ((p) & (1 << 7))
/* 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) XHCI_HCC_EXT_CAPS(p)
/* db_off bitmask - bits 0:1 reserved */
#define DBOFF_MASK (~0x3)
/* run_regs_off bitmask - bits 0:4 reserved */
#define RTSOFF_MASK (~0x1f)
};
struct xhci_hcor_port_regs {
volatile uint32_t or_portsc;
volatile uint32_t or_portpmsc;
volatile uint32_t or_portli;
volatile uint32_t reserved_3;
};
struct xhci_hcor {
volatile uint32_t or_usbcmd;
volatile uint32_t or_usbsts;
volatile uint32_t or_pagesize;
volatile uint32_t reserved_0[2];
volatile uint32_t or_dnctrl;
volatile uint64_t or_crcr;
volatile uint32_t reserved_1[4];
volatile uint64_t or_dcbaap;
volatile uint32_t or_config;
volatile uint32_t reserved_2[241];
struct xhci_hcor_port_regs portregs[MAX_HC_PORTS];
};
/* USBCMD - USB command - command bitmasks */
/* start/stop HC execution - do not write unless HC is halted*/
#define CMD_RUN XHCI_CMD_RUN
/* Reset HC - resets internal HC state machine and all registers (except
* PCI config regs). HC does NOT drive a USB reset on the downstream ports.
* The xHCI driver must reinitialize the xHC after setting this bit.
*/
#define CMD_RESET (1 << 1)
/* Event Interrupt Enable - a '1' allows interrupts from the host controller */
#define CMD_EIE XHCI_CMD_EIE
/* Host System Error Interrupt Enable - get out-of-band signal for HC errors */
#define CMD_HSEIE XHCI_CMD_HSEIE
/* bits 4:6 are reserved (and should be preserved on writes). */
/* light reset (port status stays unchanged) - reset completed when this is 0 */
#define CMD_LRESET (1 << 7)
/* host controller save/restore state. */
#define CMD_CSS (1 << 8)
#define CMD_CRS (1 << 9)
/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
#define CMD_EWE XHCI_CMD_EWE
/* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root
* hubs are in U3 (selective suspend), disconnect, disabled, or powered-off.
* '0' means the xHC can power it off if all ports are in the disconnect,
* disabled, or powered-off state.
*/
#define CMD_PM_INDEX (1 << 11)
/* bits 12:31 are reserved (and should be preserved on writes). */
/* USBSTS - USB status - status bitmasks */
/* HC not running - set to 1 when run/stop bit is cleared. */
#define STS_HALT XHCI_STS_HALT
/* serious error, e.g. PCI parity error. The HC 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 xHC is saving state */
#define STS_SAVE (1 << 8)
/* restore state status - '1' means xHC 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 XHCI_STS_CNR
/* true: internal Host Controller Error - SW needs to reset and reinitialize */
#define STS_HCE (1 << 12)
/* bits 13:31 reserved and should be preserved */
/*
* DNCTRL - Device Notification Control Register - dev_notification bitmasks
* Generate a device notification event when the HC sees a transaction with a
* notification type that matches a bit set in this bit field.
*/
#define DEV_NOTE_MASK (0xffff)
#define ENABLE_DEV_NOTE(x) (1 << (x))
/* Most of the device notification types should only be used for debug.
* SW does need to pay attention to function wake notifications.
*/
#define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1)
/* 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)
/* bits 8:31 - 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_U2 (0x2 << 5)
#define XDEV_U3 (0x3 << 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 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)
/* Bits 20:23 in the Slot Context are the speed for the device */
#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)
/* Port Indicator Control */
#define PORT_LED_OFF (0 << 14)
#define PORT_LED_AMBER (1 << 14)
#define PORT_LED_GREEN (2 << 14)
#define PORT_LED_MASK (3 << 14)
/* 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)
/* bit 24 reserved */
/* 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 28:29 reserved */
/* true: device is removable - for USB 3.0 roothub emulation */
#define PORT_DEV_REMOVE (1 << 30)
/* Initiate a warm port reset - complete when PORT_WRC is '1' */
#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)
/* Inactivity timer value for transitions into U2 */
#define PORT_U2_TIMEOUT(p) (((p) & 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(p) (((p) & 0xff) << 8)
#define PORT_HLE (1 << 16)
/**
* struct xhci_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 HC 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 HCD (Linux) processes those events and updates the dequeue pointer.
*/
struct xhci_intr_reg {
volatile __le32 irq_pending;
volatile __le32 irq_control;
volatile __le32 erst_size;
volatile __le32 rsvd;
volatile __le64 erst_base;
volatile __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 xhci_run_regs
* @microframe_index: MFINDEX - current microframe number
*
* Section 5.5 Host Controller Runtime Registers:
* "Software should read and write these registers using only Dword (32 bit)
* or larger accesses"
*/
struct xhci_run_regs {
__le32 microframe_index;
__le32 rsvd[7];
struct xhci_intr_reg ir_set[128];
};
/**
* struct doorbell_array
*
* Bits 0 - 7: Endpoint target
* Bits 8 - 15: RsvdZ
* Bits 16 - 31: Stream ID
*
* Section 5.6
*/
struct xhci_doorbell_array {
volatile __le32 doorbell[256];
};
#define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16))
#define DB_VALUE_HOST 0x00000000
/**
* struct xhci_protocol_caps
* @revision: major revision, minor revision, capability ID,
* and next capability pointer.
* @name_string: Four ASCII characters to say which spec this xHC
* follows, typically "USB ".
* @port_info: Port offset, count, and protocol-defined information.
*/
struct xhci_protocol_caps {
u32 revision;
u32 name_string;
u32 port_info;
};
#define XHCI_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff)
#define XHCI_EXT_PORT_OFF(x) ((x) & 0xff)
#define XHCI_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff)
/**
* struct xhci_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
*
* Represents either a Device or Input context. Holds a pointer to the raw
* memory used for the context (bytes).
*/
struct xhci_container_ctx {
unsigned type;
#define XHCI_CTX_TYPE_DEVICE 0x1
#define XHCI_CTX_TYPE_INPUT 0x2
int size;
u8 *bytes;
};
/**
* struct xhci_slot_ctx
* @dev_info: Route string, device speed, hub info, and last valid endpoint
* @dev_info2: Max exit latency for device number, root hub port number
* @tt_info: tt_info is used to construct split transaction tokens
* @dev_state: slot state and device address
*
* Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context
* structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
* reserved at the end of the slot context for HC internal use.
*/
struct xhci_slot_ctx {
__le32 dev_info;
__le32 dev_info2;
__le32 tt_info;
__le32 dev_state;
/* offset 0x10 to 0x1f reserved for HC internal use */
__le32 reserved[4];
};
/* dev_info bitmasks */
/* Route String - 0:19 */
#define ROUTE_STRING_MASK (0xfffff)
/* Device speed - values defined by PORTSC Device Speed field - 20:23 */
#define DEV_SPEED (0xf << 20)
/* bit 24 reserved */
/* Is this LS/FS device connected through a HS hub? - bit 25 */
#define DEV_MTT (0x1 << 25)
/* Set if the device is a hub - bit 26 */
#define DEV_HUB (0x1 << 26)
/* 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 hub port number that is needed to access the USB device */
#define ROOT_HUB_PORT(p) (((p) & 0xff) << 16)
#define ROOT_HUB_PORT_MASK (0xff)
#define ROOT_HUB_PORT_SHIFT (16)
#define DEVINFO_TO_ROOT_HUB_PORT(p) (((p) >> 16) & 0xff)
/* Maximum number of ports under a hub device */
#define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24)
/* tt_info bitmasks */
/*
* TT Hub Slot ID - for low or full speed devices attached to a high-speed hub
* The Slot ID of the hub that isolates the high speed signaling from
* this low or full-speed device. '0' if attached to root hub port.
*/
#define TT_SLOT(p) (((p) & 0xff) << 0)
/*
* The number of the downstream facing port of the high-speed hub
* '0' if the device is not low or full speed.
*/
#define TT_PORT(p) (((p) & 0xff) << 8)
#define TT_THINK_TIME(p) (((p) & 0x3) << 16)
/* dev_state bitmasks */
/* USB device address - assigned by the HC */
#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 xhci_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 HC 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 - section 6.2.1.2.This assumes the HC uses 32-byte context
* structures.If the HC uses 64-byte contexts, there is an additional 32 bytes
* reserved at the end of the endpoint context for HC internal use.
*/
struct xhci_ep_ctx {
__le32 ep_info;
__le32 ep_info2;
__le64 deq;
__le32 tx_info;
/* offset 0x14 - 0x1f reserved for HC 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
/* 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)
/* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */
#define EP_HAS_LSA (1 << 15)
/* ep_info2 bitmasks */
/*
* Force Event - generate transfer events for all TRBs for this endpoint
* This will tell the HC to ignore the IOC and ISP flags (for debugging only).
*/
#define FORCE_EVENT (0x1)
#define ERROR_COUNT(p) (((p) & 0x3) << 1)
#define ERROR_COUNT_SHIFT (1)
#define ERROR_COUNT_MASK (0x3)
#define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7)
#define EP_TYPE(p) ((p) << 3)
#define EP_TYPE_SHIFT (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 Host Initiate Disable - for disabling stream selection */
#define MAX_BURST(p) (((p)&0xff) << 8)
#define MAX_BURST_MASK (0xff)
#define MAX_BURST_SHIFT (8)
#define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff)
#define MAX_PACKET(p) (((p)&0xffff) << 16)
#define MAX_PACKET_MASK (0xffff)
#define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff)
#define MAX_PACKET_SHIFT (16)
/* 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)
/**
* struct xhci_input_control_context
* Input control context; see section 6.2.5.
*
* @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 xhci_input_control_ctx {
volatile __le32 drop_flags;
volatile __le32 add_flags;
__le32 rsvd2[6];
};
/**
* struct xhci_device_context_array
* @dev_context_ptr array of 64-bit DMA addresses for device contexts
*/
struct xhci_device_context_array {
/* 64-bit device addresses; we only write 32-bit addresses */
__le64 dev_context_ptrs[MAX_HC_SLOTS];
};
/* TODO: write function to set the 64-bit device DMA address */
/*
* TODO: change this to be dynamically sized at HC mem init time since the HC
* might not be able to handle the maximum number of devices possible.
*/
struct xhci_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 */
volatile __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 COMP_CODE_SHIFT (24)
#define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24)
typedef enum {
COMP_SUCCESS = 1,
/* Data Buffer Error */
COMP_DB_ERR, /* 2 */
/* Babble Detected Error */
COMP_BABBLE, /* 3 */
/* USB Transaction Error */
COMP_TX_ERR, /* 4 */
/* TRB Error - some TRB field is invalid */
COMP_TRB_ERR, /* 5 */
/* Stall Error - USB device is stalled */
COMP_STALL, /* 6 */
/* Resource Error - HC doesn't have memory for that device configuration */
COMP_ENOMEM, /* 7 */
/* Bandwidth Error - not enough room in schedule for this dev config */
COMP_BW_ERR, /* 8 */
/* No Slots Available Error - HC ran out of device slots */
COMP_ENOSLOTS, /* 9 */
/* Invalid Stream Type Error */
COMP_STREAM_ERR, /* 10 */
/* Slot Not Enabled Error - doorbell rung for disabled device slot */
COMP_EBADSLT, /* 11 */
/* Endpoint Not Enabled Error */
COMP_EBADEP,/* 12 */
/* Short Packet */
COMP_SHORT_TX, /* 13 */
/* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */
COMP_UNDERRUN, /* 14 */
/* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */
COMP_OVERRUN, /* 15 */
/* Virtual Function Event Ring Full Error */
COMP_VF_FULL, /* 16 */
/* Parameter Error - Context parameter is invalid */
COMP_EINVAL, /* 17 */
/* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */
COMP_BW_OVER,/* 18 */
/* Context State Error - illegal context state transition requested */
COMP_CTX_STATE,/* 19 */
/* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */
COMP_PING_ERR,/* 20 */
/* Event Ring is full */
COMP_ER_FULL,/* 21 */
/* Incompatible Device Error */
COMP_DEV_ERR,/* 22 */
/* Missed Service Error - HC couldn't service an isoc ep within interval */
COMP_MISSED_INT,/* 23 */
/* Successfully stopped command ring */
COMP_CMD_STOP, /* 24 */
/* Successfully aborted current command and stopped command ring */
COMP_CMD_ABORT, /* 25 */
/* Stopped - transfer was terminated by a stop endpoint command */
COMP_STOP,/* 26 */
/* Same as COMP_EP_STOPPED, but the transferred length in the event
* is invalid */
COMP_STOP_INVAL, /* 27*/
/* Control Abort Error - Debug Capability - control pipe aborted */
COMP_DBG_ABORT, /* 28 */
/* Max Exit Latency Too Large Error */
COMP_MEL_ERR,/* 29 */
/* TRB type 30 reserved */
/* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */
COMP_BUFF_OVER = 31,
/* Event Lost Error - xHC has an "internal event overrun condition" */
COMP_ISSUES, /* 32 */
/* Undefined Error - reported when other error codes don't apply */
COMP_UNKNOWN, /* 33 */
/* Invalid Stream ID Error */
COMP_STRID_ERR, /* 34 */
/* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */
COMP_2ND_BW_ERR, /* 35 */
/* Split Transaction Error */
COMP_SPLIT_ERR /* 36 */
} xhci_comp_code;
struct xhci_link_trb {
/* 64-bit segment pointer*/
volatile __le64 segment_ptr;
volatile __le32 intr_target;
volatile __le32 control;
};
/* control bitfields */
#define LINK_TOGGLE (0x1 << 1)
/* Command completion event TRB */
struct xhci_event_cmd {
/* Pointer to command TRB, or the value passed by the event data trb */
volatile __le64 cmd_trb;
volatile __le32 status;
volatile __le32 flags;
};
/* flags bitmasks */
/* 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 TRB_TO_SLOT_ID_SHIFT (24)
#define TRB_TO_SLOT_ID_MASK (0xff << TRB_TO_SLOT_ID_SHIFT)
#define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24)
#define SLOT_ID_FOR_TRB_MASK (0xff)
#define SLOT_ID_FOR_TRB_SHIFT (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)
/* Port Status Change Event TRB fields */
/* Port ID - bits 31:24 */
#define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24)
#define PORT_ID_SHIFT (24)
#define PORT_ID_MASK (0xff << PORT_ID_SHIFT)
/* Normal TRB fields */
/* transfer_len bitmasks - bits 0:16 */
#define TRB_LEN(p) ((p) & 0x1ffff)
#define TRB_LEN_MASK (0x1ffff)
/* Interrupter Target - which MSI-X vector to target the completion event at */
#define TRB_INTR_TARGET_SHIFT (22)
#define TRB_INTR_TARGET_MASK (0x3ff)
#define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22)
#define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff)
#define TRB_TBC(p) (((p) & 0x3) << 7)
#define TRB_TLBPC(p) (((p) & 0xf) << 16)
/* Cycle bit - indicates TRB ownership by HC or HCD */
#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_TX_TYPE_SHIFT (16)
#define TRB_DATA_OUT 2
#define TRB_DATA_IN 3
/* Isochronous TRB specific fields */
#define TRB_SIA (1 << 31)
struct xhci_generic_trb {
volatile __le32 field[4];
};
union xhci_trb {
struct xhci_link_trb link;
struct xhci_transfer_event trans_event;
struct xhci_event_cmd event_cmd;
struct xhci_generic_trb generic;
};
/* TRB bit mask */
#define TRB_TYPE_BITMASK (0xfc00)
#define TRB_TYPE(p) ((p) << 10)
#define TRB_TYPE_SHIFT (10)
#define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10)
/* TRB type IDs */
typedef enum {
/* bulk, interrupt, isoc scatter/gather, and control data stage */
TRB_NORMAL = 1,
/* setup stage for control transfers */
TRB_SETUP, /* 2 */
/* data stage for control transfers */
TRB_DATA, /* 3 */
/* status stage for control transfers */
TRB_STATUS, /* 4 */
/* isoc transfers */
TRB_ISOC, /* 5 */
/* TRB for linking ring segments */
TRB_LINK, /* 6 */
/* TRB for EVENT DATA */
TRB_EVENT_DATA, /* 7 */
/* Transfer Ring No-op (not for the command ring) */
TRB_TR_NOOP, /* 8 */
/* Command TRBs */
/* Enable Slot Command */
TRB_ENABLE_SLOT, /* 9 */
/* Disable Slot Command */
TRB_DISABLE_SLOT, /* 10 */
/* Address Device Command */
TRB_ADDR_DEV, /* 11 */
/* Configure Endpoint Command */
TRB_CONFIG_EP, /* 12 */
/* Evaluate Context Command */
TRB_EVAL_CONTEXT, /* 13 */
/* Reset Endpoint Command */
TRB_RESET_EP, /* 14 */
/* Stop Transfer Ring Command */
TRB_STOP_RING, /* 15 */
/* Set Transfer Ring Dequeue Pointer Command */
TRB_SET_DEQ, /* 16 */
/* Reset Device Command */
TRB_RESET_DEV, /* 17 */
/* Force Event Command (opt) */
TRB_FORCE_EVENT, /* 18 */
/* Negotiate Bandwidth Command (opt) */
TRB_NEG_BANDWIDTH, /* 19 */
/* Set Latency Tolerance Value Command (opt) */
TRB_SET_LT, /* 20 */
/* Get port bandwidth Command */
TRB_GET_BW, /* 21 */
/* Force Header Command - generate a transaction or link management packet */
TRB_FORCE_HEADER, /* 22 */
/* No-op Command - not for transfer rings */
TRB_CMD_NOOP, /* 23 */
/* TRB IDs 24-31 reserved */
/* Event TRBS */
/* Transfer Event */
TRB_TRANSFER = 32,
/* Command Completion Event */
TRB_COMPLETION, /* 33 */
/* Port Status Change Event */
TRB_PORT_STATUS, /* 34 */
/* Bandwidth Request Event (opt) */
TRB_BANDWIDTH_EVENT, /* 35 */
/* Doorbell Event (opt) */
TRB_DOORBELL, /* 36 */
/* Host Controller Event */
TRB_HC_EVENT, /* 37 */
/* Device Notification Event - device sent function wake notification */
TRB_DEV_NOTE, /* 38 */
/* MFINDEX Wrap Event - microframe counter wrapped */
TRB_MFINDEX_WRAP, /* 39 */
/* TRB IDs 40-47 reserved, 48-63 is vendor-defined */
/* Nec vendor-specific command completion event. */
TRB_NEC_CMD_COMP = 48, /* 48 */
/* Get NEC firmware revision. */
TRB_NEC_GET_FW, /* 49 */
} trb_type;
#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 64
/* Allow two commands + a link TRB, along with any reserved command TRBs */
#define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3)
#define SEGMENT_SIZE (TRBS_PER_SEGMENT*16)
/* SEGMENT_SHIFT should be log2(SEGMENT_SIZE).
* Change this if you change TRBS_PER_SEGMENT!
*/
#define SEGMENT_SHIFT 10
/* TRB buffer pointers can't cross 64KB boundaries */
#define TRB_MAX_BUFF_SHIFT 16
#define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT)
struct xhci_segment {
union xhci_trb *trbs;
/* private to HCD */
struct xhci_segment *next;
};
struct xhci_ring {
struct xhci_segment *first_seg;
union xhci_trb *enqueue;
struct xhci_segment *enq_seg;
union xhci_trb *dequeue;
struct xhci_segment *deq_seg;
/*
* Write the cycle state into the TRB cycle field to give ownership of
* the TRB to the host controller (if we are the producer), or to check
* if we own the TRB (if we are the consumer). See section 4.9.1.
*/
volatile u32 cycle_state;
unsigned int num_segs;
};
struct xhci_erst_entry {
/* 64-bit event ring segment address */
__le64 seg_addr;
__le32 seg_size;
/* Set to zero */
__le32 rsvd;
};
struct xhci_erst {
struct xhci_erst_entry *entries;
unsigned int num_entries;
/* Num entries the ERST can contain */
unsigned int erst_size;
};
struct xhci_scratchpad {
u64 *sp_array;
};
/*
* 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 number of event segment rings allocated */
#define ERST_ENTRIES 1
/* Initial allocated size of the ERST, in number of entries */
#define ERST_SIZE 64
/* Poll every 60 seconds */
#define POLL_TIMEOUT 60
/* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */
#define XHCI_STOP_EP_CMD_TIMEOUT 5
/* XXX: Make these module parameters */
struct xhci_virt_ep {
struct xhci_ring *ring;
unsigned int ep_state;
#define SET_DEQ_PENDING (1 << 0)
#define EP_HALTED (1 << 1) /* For stall handling */
#define EP_HALT_PENDING (1 << 2) /* For URB cancellation */
/* Transitioning the endpoint to using streams, don't enqueue URBs */
#define EP_GETTING_STREAMS (1 << 3)
#define EP_HAS_STREAMS (1 << 4)
/* Transitioning the endpoint to not using streams, don't enqueue URBs */
#define EP_GETTING_NO_STREAMS (1 << 5)
};
#define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32)
struct xhci_virt_device {
struct usb_device *udev;
/*
* 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 xhci_container_ctx *out_ctx;
/* Used for addressing devices and configuration changes */
struct xhci_container_ctx *in_ctx;
/* Rings saved to ensure old alt settings can be re-instated */
#define XHCI_MAX_RINGS_CACHED 31
struct xhci_virt_ep eps[31];
};
/* TODO: copied from ehci.h - can be refactored? */
/* xHCI spec says all registers are little endian */
static inline unsigned int xhci_readl(uint32_t volatile *regs)
{
return readl(regs);
}
static inline void xhci_writel(uint32_t volatile *regs, const unsigned int val)
{
writel(val, regs);
}
/*
* Registers should always be accessed with double word or quad word accesses.
* Some xHCI implementations may support 64-bit address pointers. 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.
* xHCI implementations that do not support 64-bit address pointers will ignore
* the high dword, and write order is irrelevant.
*/
static inline u64 xhci_readq(__le64 volatile *regs)
{
#if BITS_PER_LONG == 64
return readq(regs);
#else
return lo_hi_readq(regs);
#endif
}
static inline void xhci_writeq(__le64 volatile *regs, const u64 val)
{
#if BITS_PER_LONG == 64
writeq(val, regs);
#else
lo_hi_writeq(val, regs);
#endif
}
int xhci_hcd_init(int index, struct xhci_hccr **ret_hccr,
struct xhci_hcor **ret_hcor);
void xhci_hcd_stop(int index);
/*************************************************************
EXTENDED CAPABILITY DEFINITIONS
*************************************************************/
/* Up to 16 ms to halt an HC */
#define XHCI_MAX_HALT_USEC (16*1000)
/* HC not running - set to 1 when run/stop bit is cleared. */
#define XHCI_STS_HALT (1 << 0)
/* HCCPARAMS offset from PCI base address */
#define XHCI_HCC_PARAMS_OFFSET 0x10
/* HCCPARAMS contains the first extended capability pointer */
#define XHCI_HCC_EXT_CAPS(p) (((p)>>16)&0xffff)
/* Command and Status registers offset from the Operational Registers address */
#define XHCI_CMD_OFFSET 0x00
#define XHCI_STS_OFFSET 0x04
#define XHCI_MAX_EXT_CAPS 50
/* Capability Register */
/* bits 7:0 - how long is the Capabilities register */
#define XHCI_HC_LENGTH(p) (((p) >> 00) & 0x00ff)
/* Extended capability register fields */
#define XHCI_EXT_CAPS_ID(p) (((p) >> 0) & 0xff)
#define XHCI_EXT_CAPS_NEXT(p) (((p) >> 8) & 0xff)
#define XHCI_EXT_CAPS_VAL(p) ((p) >> 16)
/* Extended capability IDs - ID 0 reserved */
#define XHCI_EXT_CAPS_LEGACY 1
#define XHCI_EXT_CAPS_PROTOCOL 2
#define XHCI_EXT_CAPS_PM 3
#define XHCI_EXT_CAPS_VIRT 4
#define XHCI_EXT_CAPS_ROUTE 5
/* IDs 6-9 reserved */
#define XHCI_EXT_CAPS_DEBUG 10
/* USB Legacy Support Capability - section 7.1.1 */
#define XHCI_HC_BIOS_OWNED (1 << 16)
#define XHCI_HC_OS_OWNED (1 << 24)
/* USB Legacy Support Capability - section 7.1.1 */
/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */
#define XHCI_LEGACY_SUPPORT_OFFSET (0x00)
/* USB Legacy Support Control and Status Register - section 7.1.2 */
/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */
#define XHCI_LEGACY_CONTROL_OFFSET (0x04)
/* bits 1:2, 5:12, and 17:19 need to be preserved; bits 21:28 should be zero */
#define XHCI_LEGACY_DISABLE_SMI ((0x3 << 1) + (0xff << 5) + (0x7 << 17))
/* USB 2.0 xHCI 0.96 L1C capability - section 7.2.2.1.3.2 */
#define XHCI_L1C (1 << 16)
/* USB 2.0 xHCI 1.0 hardware LMP capability - section 7.2.2.1.3.2 */
#define XHCI_HLC (1 << 19)
/* command register values to disable interrupts and halt the HC */
/* start/stop HC execution - do not write unless HC is halted*/
#define XHCI_CMD_RUN (1 << 0)
/* Event Interrupt Enable - get irq when EINT bit is set in USBSTS register */
#define XHCI_CMD_EIE (1 << 2)
/* Host System Error Interrupt Enable - get irq when HSEIE bit set in USBSTS */
#define XHCI_CMD_HSEIE (1 << 3)
/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
#define XHCI_CMD_EWE (1 << 10)
#define XHCI_IRQS (XHCI_CMD_EIE | XHCI_CMD_HSEIE | XHCI_CMD_EWE)
/* true: Controller Not Ready to accept doorbell or op reg writes after reset */
#define XHCI_STS_CNR (1 << 11)
struct xhci_ctrl {
struct usb_host host;
struct device_d *dev;
struct xhci_hccr *hccr; /* R/O registers, not need for volatile */
struct xhci_hcor *hcor;
struct xhci_doorbell_array *dba;
struct xhci_run_regs *run_regs;
struct xhci_device_context_array *dcbaa;
struct xhci_ring *event_ring;
struct xhci_ring *cmd_ring;
struct xhci_ring *transfer_ring;
struct xhci_segment *seg;
struct xhci_intr_reg *ir_set;
struct xhci_erst erst;
struct xhci_erst_entry entry[ERST_NUM_SEGS];
struct xhci_scratchpad *scratchpad;
struct xhci_virt_device *devs[MAX_HC_SLOTS];
void *bounce_buffer;
int rootdev;
};
static inline struct xhci_ctrl *to_xhci(struct usb_host *host)
{
return container_of(host, struct xhci_ctrl, host);
}
unsigned long trb_addr(struct xhci_segment *seg, union xhci_trb *trb);
struct xhci_input_control_ctx
*xhci_get_input_control_ctx(struct xhci_container_ctx *ctx);
struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_ctrl *ctrl,
struct xhci_container_ctx *ctx);
struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_ctrl *ctrl,
struct xhci_container_ctx *ctx,
unsigned int ep_index);
void xhci_endpoint_copy(struct xhci_ctrl *ctrl,
struct xhci_container_ctx *in_ctx,
struct xhci_container_ctx *out_ctx,
unsigned int ep_index);
void xhci_slot_copy(struct xhci_ctrl *ctrl,
struct xhci_container_ctx *in_ctx,
struct xhci_container_ctx *out_ctx);
void xhci_setup_addressable_virt_dev(struct xhci_ctrl *ctrl,
struct usb_device *udev, int hop_portnr);
void xhci_queue_command(struct xhci_ctrl *ctrl, u8 *ptr,
u32 slot_id, u32 ep_index, trb_type cmd);
void xhci_acknowledge_event(struct xhci_ctrl *ctrl);
union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected);
int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe,
int length, void *buffer);
int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe,
struct devrequest *req, int length, void *buffer);
int xhci_check_maxpacket(struct usb_device *udev);
void xhci_flush_cache(uintptr_t addr, u32 type_len);
void xhci_inval_cache(uintptr_t addr, u32 type_len);
void xhci_cleanup(struct xhci_ctrl *ctrl);
struct xhci_ring *xhci_ring_alloc(struct xhci_ctrl *ctrl, unsigned int num_segs,
bool link_trbs);
int xhci_alloc_virt_device(struct xhci_ctrl *ctrl, unsigned int slot_id);
int xhci_mem_init(struct xhci_ctrl *ctrl, struct xhci_hccr *hccr,
struct xhci_hcor *hcor);
/**
* xhci_deregister() - Unregister an XHCI controller
*
* @dev: Controller device
* @return 0 if registered, -ve on error
*/
int xhci_deregister(struct xhci_ctrl *ctrl);
/**
* xhci_register() - Register a new XHCI controller
*
* @dev: Controller device
* @hccr: Host controller control registers
* @hcor: Not sure what this means
* @return 0 if registered, -ve on error
*/
int xhci_register(struct xhci_ctrl *ctrl);
extern struct dm_usb_ops xhci_usb_ops;
struct xhci_ctrl *xhci_get_ctrl(struct usb_device *udev);
#endif /* HOST_XHCI_H_ */
