/* * 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 * Vikas Sajjan * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef HOST_XHCI_H_ #define HOST_XHCI_H_ #include #include #include #include #include #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 __u32 *ptr = (__u32 *)regs; u64 val_lo = readl(ptr); u64 val_hi = readl(ptr + 1); return val_lo + (val_hi << 32); #endif } static inline void xhci_writeq(__le64 volatile *regs, const u64 val) { #if BITS_PER_LONG == 64 writeq(val, regs); #else __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); #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 { #ifdef CONFIG_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_ */