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u-boot/include/usb/xhci.h
Sylwester Nawrocki 8e2ab05000 usb: xhci: Use only 32-bit accesses in xhci_writeq/xhci_readq 
There might be hardware configurations where 64-bit data accesses
to XHCI registers are not supported properly.  This patch removes
the readq/writeq so always two 32-bit accesses are used to read/write
64-bit XHCI registers, similarly as it is done in Linux kernel.

This patch fixes operation of the XHCI controller on RPI4 Broadcom
BCM2711 SoC based board, where the VL805 USB XHCI controller is
connected to the PCIe Root Complex, which is attached to the system
through the SCB bridge.

Even though the architecture is 64-bit the PCIe BAR is 32-bit and likely
the 64-bit wide register accesses initiated by the CPU are not properly
translated to a sequence of 32-bit PCIe accesses.
xhci_readq(), for example, always returns same value in upper and lower
32-bits, e.g. 0xabcd1234abcd1234 instead of 0x00000000abcd1234.

Cc: Sergey Temerkhanov <s.temerkhanov@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
2020-07-09 15:46:12 +02:00

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/* 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 <asm/cache.h>
#include <asm/io.h>
#include <linux/list.h>
#include <linux/compat.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)
/* reserved[0] bitmasks, MediaTek xHCI used */
#define EP_BPKTS(p) (((p) & 0x7f) << 0)
#define EP_BBM(p) (((p) & 0x1) << 11)
/**
* 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)
{
__u32 *ptr = (__u32 *)regs;
u64 val_lo = readl(ptr);
u64 val_hi = readl(ptr + 1);
return val_lo + (val_hi << 32);
}
static inline void xhci_writeq(__le64 volatile *regs, const u64 val)
{
__u32 *ptr = (__u32 *)regs;
u32 val_lo = lower_32_bits(val);
/* FIXME */
u32 val_hi = upper_32_bits(val);
writel(val_lo, ptr);
writel(val_hi, ptr + 1);
}
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 {
#if CONFIG_IS_ENABLED(DM_USB)
struct udevice *dev;
#endif
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 \
__attribute__ ((aligned(ARCH_DMA_MINALIGN)));
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];
int rootdev;
};
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(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 udevice *dev);
/**
* 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 udevice *dev, struct xhci_hccr *hccr,
struct xhci_hcor *hcor);
extern struct dm_usb_ops xhci_usb_ops;
struct xhci_ctrl *xhci_get_ctrl(struct usb_device *udev);
#endif /* HOST_XHCI_H_ */
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