3 * xHCI host controller driver
5 * Copyright (C) 2008 Intel Corp.
8 * Some code borrowed from the Linux EHCI driver.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #ifndef __LINUX_XHCI_HCD_H
25 #define __LINUX_XHCI_HCD_H
27 #include <linux/usb.h>
28 #include <linux/timer.h>
29 #include <linux/kernel.h>
30 #include <linux/usb/hcd.h>
32 /* Code sharing between pci-quirks and xhci hcd */
33 #include "xhci-ext-caps.h"
34 #include "pci-quirks.h"
36 /* xHCI PCI Configuration Registers */
37 #define XHCI_SBRN_OFFSET (0x60)
39 /* Max number of USB devices for any host controller - limit in section 6.1 */
40 #define MAX_HC_SLOTS 256
41 /* Section 5.3.3 - MaxPorts */
42 #define MAX_HC_PORTS 127
45 * xHCI register interface.
46 * This corresponds to the eXtensible Host Controller Interface (xHCI)
47 * Revision 0.95 specification
51 * struct xhci_cap_regs - xHCI Host Controller Capability Registers.
52 * @hc_capbase: length of the capabilities register and HC version number
53 * @hcs_params1: HCSPARAMS1 - Structural Parameters 1
54 * @hcs_params2: HCSPARAMS2 - Structural Parameters 2
55 * @hcs_params3: HCSPARAMS3 - Structural Parameters 3
56 * @hcc_params: HCCPARAMS - Capability Parameters
57 * @db_off: DBOFF - Doorbell array offset
58 * @run_regs_off: RTSOFF - Runtime register space offset
59 * @hcc_params2: HCCPARAMS2 Capability Parameters 2, xhci 1.1 only
61 struct xhci_cap_regs {
69 __le32 hcc_params2; /* xhci 1.1 */
70 /* Reserved up to (CAPLENGTH - 0x1C) */
73 /* hc_capbase bitmasks */
74 /* bits 7:0 - how long is the Capabilities register */
75 #define HC_LENGTH(p) XHCI_HC_LENGTH(p)
77 #define HC_VERSION(p) (((p) >> 16) & 0xffff)
79 /* HCSPARAMS1 - hcs_params1 - bitmasks */
80 /* bits 0:7, Max Device Slots */
81 #define HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff)
82 #define HCS_SLOTS_MASK 0xff
83 /* bits 8:18, Max Interrupters */
84 #define HCS_MAX_INTRS(p) (((p) >> 8) & 0x7ff)
85 /* bits 24:31, Max Ports - max value is 0x7F = 127 ports */
86 #define HCS_MAX_PORTS(p) (((p) >> 24) & 0x7f)
88 /* HCSPARAMS2 - hcs_params2 - bitmasks */
89 /* bits 0:3, frames or uframes that SW needs to queue transactions
90 * ahead of the HW to meet periodic deadlines */
91 #define HCS_IST(p) (((p) >> 0) & 0xf)
92 /* bits 4:7, max number of Event Ring segments */
93 #define HCS_ERST_MAX(p) (((p) >> 4) & 0xf)
94 /* bits 21:25 Hi 5 bits of Scratchpad buffers SW must allocate for the HW */
95 /* bit 26 Scratchpad restore - for save/restore HW state - not used yet */
96 /* bits 27:31 Lo 5 bits of Scratchpad buffers SW must allocate for the HW */
97 #define HCS_MAX_SCRATCHPAD(p) ((((p) >> 16) & 0x3e0) | (((p) >> 27) & 0x1f))
99 /* HCSPARAMS3 - hcs_params3 - bitmasks */
100 /* bits 0:7, Max U1 to U0 latency for the roothub ports */
101 #define HCS_U1_LATENCY(p) (((p) >> 0) & 0xff)
102 /* bits 16:31, Max U2 to U0 latency for the roothub ports */
103 #define HCS_U2_LATENCY(p) (((p) >> 16) & 0xffff)
105 /* HCCPARAMS - hcc_params - bitmasks */
106 /* true: HC can use 64-bit address pointers */
107 #define HCC_64BIT_ADDR(p) ((p) & (1 << 0))
108 /* true: HC can do bandwidth negotiation */
109 #define HCC_BANDWIDTH_NEG(p) ((p) & (1 << 1))
110 /* true: HC uses 64-byte Device Context structures
111 * FIXME 64-byte context structures aren't supported yet.
113 #define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2))
114 /* true: HC has port power switches */
115 #define HCC_PPC(p) ((p) & (1 << 3))
116 /* true: HC has port indicators */
117 #define HCS_INDICATOR(p) ((p) & (1 << 4))
118 /* true: HC has Light HC Reset Capability */
119 #define HCC_LIGHT_RESET(p) ((p) & (1 << 5))
120 /* true: HC supports latency tolerance messaging */
121 #define HCC_LTC(p) ((p) & (1 << 6))
122 /* true: no secondary Stream ID Support */
123 #define HCC_NSS(p) ((p) & (1 << 7))
124 /* true: HC supports Stopped - Short Packet */
125 #define HCC_SPC(p) ((p) & (1 << 9))
126 /* true: HC has Contiguous Frame ID Capability */
127 #define HCC_CFC(p) ((p) & (1 << 11))
128 /* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */
129 #define HCC_MAX_PSA(p) (1 << ((((p) >> 12) & 0xf) + 1))
130 /* Extended Capabilities pointer from PCI base - section 5.3.6 */
131 #define HCC_EXT_CAPS(p) XHCI_HCC_EXT_CAPS(p)
133 /* db_off bitmask - bits 0:1 reserved */
134 #define DBOFF_MASK (~0x3)
136 /* run_regs_off bitmask - bits 0:4 reserved */
137 #define RTSOFF_MASK (~0x1f)
139 /* HCCPARAMS2 - hcc_params2 - bitmasks */
140 /* true: HC supports U3 entry Capability */
141 #define HCC2_U3C(p) ((p) & (1 << 0))
142 /* true: HC supports Configure endpoint command Max exit latency too large */
143 #define HCC2_CMC(p) ((p) & (1 << 1))
144 /* true: HC supports Force Save context Capability */
145 #define HCC2_FSC(p) ((p) & (1 << 2))
146 /* true: HC supports Compliance Transition Capability */
147 #define HCC2_CTC(p) ((p) & (1 << 3))
148 /* true: HC support Large ESIT payload Capability > 48k */
149 #define HCC2_LEC(p) ((p) & (1 << 4))
150 /* true: HC support Configuration Information Capability */
151 #define HCC2_CIC(p) ((p) & (1 << 5))
152 /* true: HC support Extended TBC Capability, Isoc burst count > 65535 */
153 #define HCC2_ETC(p) ((p) & (1 << 6))
155 /* Number of registers per port */
156 #define NUM_PORT_REGS 4
164 * struct xhci_op_regs - xHCI Host Controller Operational Registers.
165 * @command: USBCMD - xHC command register
166 * @status: USBSTS - xHC status register
167 * @page_size: This indicates the page size that the host controller
168 * supports. If bit n is set, the HC supports a page size
169 * of 2^(n+12), up to a 128MB page size.
170 * 4K is the minimum page size.
171 * @cmd_ring: CRP - 64-bit Command Ring Pointer
172 * @dcbaa_ptr: DCBAAP - 64-bit Device Context Base Address Array Pointer
173 * @config_reg: CONFIG - Configure Register
174 * @port_status_base: PORTSCn - base address for Port Status and Control
175 * Each port has a Port Status and Control register,
176 * followed by a Port Power Management Status and Control
177 * register, a Port Link Info register, and a reserved
179 * @port_power_base: PORTPMSCn - base address for
180 * Port Power Management Status and Control
181 * @port_link_base: PORTLIn - base address for Port Link Info (current
182 * Link PM state and control) for USB 2.1 and USB 3.0
185 struct xhci_op_regs {
191 __le32 dev_notification;
193 /* rsvd: offset 0x20-2F */
197 /* rsvd: offset 0x3C-3FF */
198 __le32 reserved4[241];
199 /* port 1 registers, which serve as a base address for other ports */
200 __le32 port_status_base;
201 __le32 port_power_base;
202 __le32 port_link_base;
204 /* registers for ports 2-255 */
205 __le32 reserved6[NUM_PORT_REGS*254];
208 /* USBCMD - USB command - command bitmasks */
209 /* start/stop HC execution - do not write unless HC is halted*/
210 #define CMD_RUN XHCI_CMD_RUN
211 /* Reset HC - resets internal HC state machine and all registers (except
212 * PCI config regs). HC does NOT drive a USB reset on the downstream ports.
213 * The xHCI driver must reinitialize the xHC after setting this bit.
215 #define CMD_RESET (1 << 1)
216 /* Event Interrupt Enable - a '1' allows interrupts from the host controller */
217 #define CMD_EIE XHCI_CMD_EIE
218 /* Host System Error Interrupt Enable - get out-of-band signal for HC errors */
219 #define CMD_HSEIE XHCI_CMD_HSEIE
220 /* bits 4:6 are reserved (and should be preserved on writes). */
221 /* light reset (port status stays unchanged) - reset completed when this is 0 */
222 #define CMD_LRESET (1 << 7)
223 /* host controller save/restore state. */
224 #define CMD_CSS (1 << 8)
225 #define CMD_CRS (1 << 9)
226 /* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
227 #define CMD_EWE XHCI_CMD_EWE
228 /* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root
229 * hubs are in U3 (selective suspend), disconnect, disabled, or powered-off.
230 * '0' means the xHC can power it off if all ports are in the disconnect,
231 * disabled, or powered-off state.
233 #define CMD_PM_INDEX (1 << 11)
234 /* bits 12:31 are reserved (and should be preserved on writes). */
236 /* IMAN - Interrupt Management Register */
237 #define IMAN_IE (1 << 1)
238 #define IMAN_IP (1 << 0)
240 /* USBSTS - USB status - status bitmasks */
241 /* HC not running - set to 1 when run/stop bit is cleared. */
242 #define STS_HALT XHCI_STS_HALT
243 /* serious error, e.g. PCI parity error. The HC will clear the run/stop bit. */
244 #define STS_FATAL (1 << 2)
245 /* event interrupt - clear this prior to clearing any IP flags in IR set*/
246 #define STS_EINT (1 << 3)
247 /* port change detect */
248 #define STS_PORT (1 << 4)
249 /* bits 5:7 reserved and zeroed */
250 /* save state status - '1' means xHC is saving state */
251 #define STS_SAVE (1 << 8)
252 /* restore state status - '1' means xHC is restoring state */
253 #define STS_RESTORE (1 << 9)
254 /* true: save or restore error */
255 #define STS_SRE (1 << 10)
256 /* true: Controller Not Ready to accept doorbell or op reg writes after reset */
257 #define STS_CNR XHCI_STS_CNR
258 /* true: internal Host Controller Error - SW needs to reset and reinitialize */
259 #define STS_HCE (1 << 12)
260 /* bits 13:31 reserved and should be preserved */
263 * DNCTRL - Device Notification Control Register - dev_notification bitmasks
264 * Generate a device notification event when the HC sees a transaction with a
265 * notification type that matches a bit set in this bit field.
267 #define DEV_NOTE_MASK (0xffff)
268 #define ENABLE_DEV_NOTE(x) (1 << (x))
269 /* Most of the device notification types should only be used for debug.
270 * SW does need to pay attention to function wake notifications.
272 #define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1)
274 /* CRCR - Command Ring Control Register - cmd_ring bitmasks */
275 /* bit 0 is the command ring cycle state */
276 /* stop ring operation after completion of the currently executing command */
277 #define CMD_RING_PAUSE (1 << 1)
278 /* stop ring immediately - abort the currently executing command */
279 #define CMD_RING_ABORT (1 << 2)
280 /* true: command ring is running */
281 #define CMD_RING_RUNNING (1 << 3)
282 /* bits 4:5 reserved and should be preserved */
283 /* Command Ring pointer - bit mask for the lower 32 bits. */
284 #define CMD_RING_RSVD_BITS (0x3f)
286 /* CONFIG - Configure Register - config_reg bitmasks */
287 /* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */
288 #define MAX_DEVS(p) ((p) & 0xff)
289 /* bit 8: U3 Entry Enabled, assert PLC when root port enters U3, xhci 1.1 */
290 #define CONFIG_U3E (1 << 8)
291 /* bit 9: Configuration Information Enable, xhci 1.1 */
292 #define CONFIG_CIE (1 << 9)
293 /* bits 10:31 - reserved and should be preserved */
295 /* PORTSC - Port Status and Control Register - port_status_base bitmasks */
296 /* true: device connected */
297 #define PORT_CONNECT (1 << 0)
298 /* true: port enabled */
299 #define PORT_PE (1 << 1)
300 /* bit 2 reserved and zeroed */
301 /* true: port has an over-current condition */
302 #define PORT_OC (1 << 3)
303 /* true: port reset signaling asserted */
304 #define PORT_RESET (1 << 4)
305 /* Port Link State - bits 5:8
306 * A read gives the current link PM state of the port,
307 * a write with Link State Write Strobe set sets the link state.
309 #define PORT_PLS_MASK (0xf << 5)
310 #define XDEV_U0 (0x0 << 5)
311 #define XDEV_U2 (0x2 << 5)
312 #define XDEV_U3 (0x3 << 5)
313 #define XDEV_INACTIVE (0x6 << 5)
314 #define XDEV_RESUME (0xf << 5)
315 /* true: port has power (see HCC_PPC) */
316 #define PORT_POWER (1 << 9)
317 /* bits 10:13 indicate device speed:
318 * 0 - undefined speed - port hasn't be initialized by a reset yet
325 #define DEV_SPEED_MASK (0xf << 10)
326 #define XDEV_FS (0x1 << 10)
327 #define XDEV_LS (0x2 << 10)
328 #define XDEV_HS (0x3 << 10)
329 #define XDEV_SS (0x4 << 10)
330 #define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10))
331 #define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
332 #define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS)
333 #define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
334 #define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
335 /* Bits 20:23 in the Slot Context are the speed for the device */
336 #define SLOT_SPEED_FS (XDEV_FS << 10)
337 #define SLOT_SPEED_LS (XDEV_LS << 10)
338 #define SLOT_SPEED_HS (XDEV_HS << 10)
339 #define SLOT_SPEED_SS (XDEV_SS << 10)
340 /* Port Indicator Control */
341 #define PORT_LED_OFF (0 << 14)
342 #define PORT_LED_AMBER (1 << 14)
343 #define PORT_LED_GREEN (2 << 14)
344 #define PORT_LED_MASK (3 << 14)
345 /* Port Link State Write Strobe - set this when changing link state */
346 #define PORT_LINK_STROBE (1 << 16)
347 /* true: connect status change */
348 #define PORT_CSC (1 << 17)
349 /* true: port enable change */
350 #define PORT_PEC (1 << 18)
351 /* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port
352 * into an enabled state, and the device into the default state. A "warm" reset
353 * also resets the link, forcing the device through the link training sequence.
354 * SW can also look at the Port Reset register to see when warm reset is done.
356 #define PORT_WRC (1 << 19)
357 /* true: over-current change */
358 #define PORT_OCC (1 << 20)
359 /* true: reset change - 1 to 0 transition of PORT_RESET */
360 #define PORT_RC (1 << 21)
361 /* port link status change - set on some port link state transitions:
363 * ------------------------------------------------------------------------------
364 * - U3 to Resume Wakeup signaling from a device
365 * - Resume to Recovery to U0 USB 3.0 device resume
366 * - Resume to U0 USB 2.0 device resume
367 * - U3 to Recovery to U0 Software resume of USB 3.0 device complete
368 * - U3 to U0 Software resume of USB 2.0 device complete
369 * - U2 to U0 L1 resume of USB 2.1 device complete
370 * - U0 to U0 (???) L1 entry rejection by USB 2.1 device
371 * - U0 to disabled L1 entry error with USB 2.1 device
372 * - Any state to inactive Error on USB 3.0 port
374 #define PORT_PLC (1 << 22)
375 /* port configure error change - port failed to configure its link partner */
376 #define PORT_CEC (1 << 23)
377 /* Cold Attach Status - xHC can set this bit to report device attached during
378 * Sx state. Warm port reset should be perfomed to clear this bit and move port
379 * to connected state.
381 #define PORT_CAS (1 << 24)
382 /* wake on connect (enable) */
383 #define PORT_WKCONN_E (1 << 25)
384 /* wake on disconnect (enable) */
385 #define PORT_WKDISC_E (1 << 26)
386 /* wake on over-current (enable) */
387 #define PORT_WKOC_E (1 << 27)
388 /* bits 28:29 reserved */
389 /* true: device is non-removable - for USB 3.0 roothub emulation */
390 #define PORT_DEV_REMOVE (1 << 30)
391 /* Initiate a warm port reset - complete when PORT_WRC is '1' */
392 #define PORT_WR (1 << 31)
394 /* We mark duplicate entries with -1 */
395 #define DUPLICATE_ENTRY ((u8)(-1))
397 /* Port Power Management Status and Control - port_power_base bitmasks */
398 /* Inactivity timer value for transitions into U1, in microseconds.
399 * Timeout can be up to 127us. 0xFF means an infinite timeout.
401 #define PORT_U1_TIMEOUT(p) ((p) & 0xff)
402 #define PORT_U1_TIMEOUT_MASK 0xff
403 /* Inactivity timer value for transitions into U2 */
404 #define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8)
405 #define PORT_U2_TIMEOUT_MASK (0xff << 8)
406 /* Bits 24:31 for port testing */
408 /* USB2 Protocol PORTSPMSC */
409 #define PORT_L1S_MASK 7
410 #define PORT_L1S_SUCCESS 1
411 #define PORT_RWE (1 << 3)
412 #define PORT_HIRD(p) (((p) & 0xf) << 4)
413 #define PORT_HIRD_MASK (0xf << 4)
414 #define PORT_L1DS_MASK (0xff << 8)
415 #define PORT_L1DS(p) (((p) & 0xff) << 8)
416 #define PORT_HLE (1 << 16)
419 /* USB2 Protocol PORTHLPMC */
420 #define PORT_HIRDM(p)((p) & 3)
421 #define PORT_L1_TIMEOUT(p)(((p) & 0xff) << 2)
422 #define PORT_BESLD(p)(((p) & 0xf) << 10)
424 /* use 512 microseconds as USB2 LPM L1 default timeout. */
425 #define XHCI_L1_TIMEOUT 512
427 /* Set default HIRD/BESL value to 4 (350/400us) for USB2 L1 LPM resume latency.
428 * Safe to use with mixed HIRD and BESL systems (host and device) and is used
429 * by other operating systems.
431 * XHCI 1.0 errata 8/14/12 Table 13 notes:
432 * "Software should choose xHC BESL/BESLD field values that do not violate a
433 * device's resume latency requirements,
434 * e.g. not program values > '4' if BLC = '1' and a HIRD device is attached,
435 * or not program values < '4' if BLC = '0' and a BESL device is attached.
437 #define XHCI_DEFAULT_BESL 4
440 * struct xhci_intr_reg - Interrupt Register Set
441 * @irq_pending: IMAN - Interrupt Management Register. Used to enable
442 * interrupts and check for pending interrupts.
443 * @irq_control: IMOD - Interrupt Moderation Register.
444 * Used to throttle interrupts.
445 * @erst_size: Number of segments in the Event Ring Segment Table (ERST).
446 * @erst_base: ERST base address.
447 * @erst_dequeue: Event ring dequeue pointer.
449 * Each interrupter (defined by a MSI-X vector) has an event ring and an Event
450 * Ring Segment Table (ERST) associated with it. The event ring is comprised of
451 * multiple segments of the same size. The HC places events on the ring and
452 * "updates the Cycle bit in the TRBs to indicate to software the current
453 * position of the Enqueue Pointer." The HCD (Linux) processes those events and
454 * updates the dequeue pointer.
456 struct xhci_intr_reg {
465 /* irq_pending bitmasks */
466 #define ER_IRQ_PENDING(p) ((p) & 0x1)
467 /* bits 2:31 need to be preserved */
468 /* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */
469 #define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe)
470 #define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2)
471 #define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2))
473 /* irq_control bitmasks */
474 /* Minimum interval between interrupts (in 250ns intervals). The interval
475 * between interrupts will be longer if there are no events on the event ring.
476 * Default is 4000 (1 ms).
478 #define ER_IRQ_INTERVAL_MASK (0xffff)
479 /* Counter used to count down the time to the next interrupt - HW use only */
480 #define ER_IRQ_COUNTER_MASK (0xffff << 16)
482 /* erst_size bitmasks */
483 /* Preserve bits 16:31 of erst_size */
484 #define ERST_SIZE_MASK (0xffff << 16)
486 /* erst_dequeue bitmasks */
487 /* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
488 * where the current dequeue pointer lies. This is an optional HW hint.
490 #define ERST_DESI_MASK (0x7)
491 /* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by
492 * a work queue (or delayed service routine)?
494 #define ERST_EHB (1 << 3)
495 #define ERST_PTR_MASK (0xf)
498 * struct xhci_run_regs
500 * MFINDEX - current microframe number
502 * Section 5.5 Host Controller Runtime Registers:
503 * "Software should read and write these registers using only Dword (32 bit)
504 * or larger accesses"
506 struct xhci_run_regs {
507 __le32 microframe_index;
509 struct xhci_intr_reg ir_set[128];
513 * struct doorbell_array
515 * Bits 0 - 7: Endpoint target
517 * Bits 16 - 31: Stream ID
521 struct xhci_doorbell_array {
522 __le32 doorbell[256];
525 #define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16))
526 #define DB_VALUE_HOST 0x00000000
529 * struct xhci_protocol_caps
530 * @revision: major revision, minor revision, capability ID,
531 * and next capability pointer.
532 * @name_string: Four ASCII characters to say which spec this xHC
533 * follows, typically "USB ".
534 * @port_info: Port offset, count, and protocol-defined information.
536 struct xhci_protocol_caps {
542 #define XHCI_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff)
543 #define XHCI_EXT_PORT_OFF(x) ((x) & 0xff)
544 #define XHCI_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff)
547 * struct xhci_container_ctx
548 * @type: Type of context. Used to calculated offsets to contained contexts.
549 * @size: Size of the context data
550 * @bytes: The raw context data given to HW
551 * @dma: dma address of the bytes
553 * Represents either a Device or Input context. Holds a pointer to the raw
554 * memory used for the context (bytes) and dma address of it (dma).
556 struct xhci_container_ctx {
558 #define XHCI_CTX_TYPE_DEVICE 0x1
559 #define XHCI_CTX_TYPE_INPUT 0x2
568 * struct xhci_slot_ctx
569 * @dev_info: Route string, device speed, hub info, and last valid endpoint
570 * @dev_info2: Max exit latency for device number, root hub port number
571 * @tt_info: tt_info is used to construct split transaction tokens
572 * @dev_state: slot state and device address
574 * Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context
575 * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
576 * reserved at the end of the slot context for HC internal use.
578 struct xhci_slot_ctx {
583 /* offset 0x10 to 0x1f reserved for HC internal use */
587 /* dev_info bitmasks */
588 /* Route String - 0:19 */
589 #define ROUTE_STRING_MASK (0xfffff)
590 /* Device speed - values defined by PORTSC Device Speed field - 20:23 */
591 #define DEV_SPEED (0xf << 20)
592 /* bit 24 reserved */
593 /* Is this LS/FS device connected through a HS hub? - bit 25 */
594 #define DEV_MTT (0x1 << 25)
595 /* Set if the device is a hub - bit 26 */
596 #define DEV_HUB (0x1 << 26)
597 /* Index of the last valid endpoint context in this device context - 27:31 */
598 #define LAST_CTX_MASK (0x1f << 27)
599 #define LAST_CTX(p) ((p) << 27)
600 #define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1)
601 #define SLOT_FLAG (1 << 0)
602 #define EP0_FLAG (1 << 1)
604 /* dev_info2 bitmasks */
605 /* Max Exit Latency (ms) - worst case time to wake up all links in dev path */
606 #define MAX_EXIT (0xffff)
607 /* Root hub port number that is needed to access the USB device */
608 #define ROOT_HUB_PORT(p) (((p) & 0xff) << 16)
609 #define DEVINFO_TO_ROOT_HUB_PORT(p) (((p) >> 16) & 0xff)
610 /* Maximum number of ports under a hub device */
611 #define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24)
613 /* tt_info bitmasks */
615 * TT Hub Slot ID - for low or full speed devices attached to a high-speed hub
616 * The Slot ID of the hub that isolates the high speed signaling from
617 * this low or full-speed device. '0' if attached to root hub port.
619 #define TT_SLOT (0xff)
621 * The number of the downstream facing port of the high-speed hub
622 * '0' if the device is not low or full speed.
624 #define TT_PORT (0xff << 8)
625 #define TT_THINK_TIME(p) (((p) & 0x3) << 16)
627 /* dev_state bitmasks */
628 /* USB device address - assigned by the HC */
629 #define DEV_ADDR_MASK (0xff)
630 /* bits 8:26 reserved */
632 #define SLOT_STATE (0x1f << 27)
633 #define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27)
635 #define SLOT_STATE_DISABLED 0
636 #define SLOT_STATE_ENABLED SLOT_STATE_DISABLED
637 #define SLOT_STATE_DEFAULT 1
638 #define SLOT_STATE_ADDRESSED 2
639 #define SLOT_STATE_CONFIGURED 3
643 * @ep_info: endpoint state, streams, mult, and interval information.
644 * @ep_info2: information on endpoint type, max packet size, max burst size,
645 * error count, and whether the HC will force an event for all
647 * @deq: 64-bit ring dequeue pointer address. If the endpoint only
648 * defines one stream, this points to the endpoint transfer ring.
649 * Otherwise, it points to a stream context array, which has a
650 * ring pointer for each flow.
652 * Average TRB lengths for the endpoint ring and
653 * max payload within an Endpoint Service Interval Time (ESIT).
655 * Endpoint Context - section 6.2.1.2. This assumes the HC uses 32-byte context
656 * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
657 * reserved at the end of the endpoint context for HC internal use.
664 /* offset 0x14 - 0x1f reserved for HC internal use */
668 /* ep_info bitmasks */
670 * Endpoint State - bits 0:2
673 * 2 - halted due to halt condition - ok to manipulate endpoint ring
678 #define EP_STATE_MASK (0xf)
679 #define EP_STATE_DISABLED 0
680 #define EP_STATE_RUNNING 1
681 #define EP_STATE_HALTED 2
682 #define EP_STATE_STOPPED 3
683 #define EP_STATE_ERROR 4
684 /* Mult - Max number of burtst within an interval, in EP companion desc. */
685 #define EP_MULT(p) (((p) & 0x3) << 8)
686 #define CTX_TO_EP_MULT(p) (((p) >> 8) & 0x3)
687 /* bits 10:14 are Max Primary Streams */
688 /* bit 15 is Linear Stream Array */
689 /* Interval - period between requests to an endpoint - 125u increments. */
690 #define EP_INTERVAL(p) (((p) & 0xff) << 16)
691 #define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff))
692 #define CTX_TO_EP_INTERVAL(p) (((p) >> 16) & 0xff)
693 #define EP_MAXPSTREAMS_MASK (0x1f << 10)
694 #define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK)
695 /* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */
696 #define EP_HAS_LSA (1 << 15)
698 /* ep_info2 bitmasks */
700 * Force Event - generate transfer events for all TRBs for this endpoint
701 * This will tell the HC to ignore the IOC and ISP flags (for debugging only).
703 #define FORCE_EVENT (0x1)
704 #define ERROR_COUNT(p) (((p) & 0x3) << 1)
705 #define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7)
706 #define EP_TYPE(p) ((p) << 3)
707 #define ISOC_OUT_EP 1
708 #define BULK_OUT_EP 2
715 /* bit 7 is Host Initiate Disable - for disabling stream selection */
716 #define MAX_BURST(p) (((p)&0xff) << 8)
717 #define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff)
718 #define MAX_PACKET(p) (((p)&0xffff) << 16)
719 #define MAX_PACKET_MASK (0xffff << 16)
720 #define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff)
722 /* Get max packet size from ep desc. Bit 10..0 specify the max packet size.
725 #define GET_MAX_PACKET(p) ((p) & 0x7ff)
727 /* tx_info bitmasks */
728 #define AVG_TRB_LENGTH_FOR_EP(p) ((p) & 0xffff)
729 #define MAX_ESIT_PAYLOAD_FOR_EP(p) (((p) & 0xffff) << 16)
730 #define CTX_TO_MAX_ESIT_PAYLOAD(p) (((p) >> 16) & 0xffff)
733 #define EP_CTX_CYCLE_MASK (1 << 0)
734 #define SCTX_DEQ_MASK (~0xfL)
738 * struct xhci_input_control_context
739 * Input control context; see section 6.2.5.
741 * @drop_context: set the bit of the endpoint context you want to disable
742 * @add_context: set the bit of the endpoint context you want to enable
744 struct xhci_input_control_ctx {
750 #define EP_IS_ADDED(ctrl_ctx, i) \
751 (le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))
752 #define EP_IS_DROPPED(ctrl_ctx, i) \
753 (le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1)))
755 /* Represents everything that is needed to issue a command on the command ring.
756 * It's useful to pre-allocate these for commands that cannot fail due to
757 * out-of-memory errors, like freeing streams.
759 struct xhci_command {
760 /* Input context for changing device state */
761 struct xhci_container_ctx *in_ctx;
763 /* If completion is null, no one is waiting on this command
764 * and the structure can be freed after the command completes.
766 struct completion *completion;
767 union xhci_trb *command_trb;
768 struct list_head cmd_list;
771 /* drop context bitmasks */
772 #define DROP_EP(x) (0x1 << x)
773 /* add context bitmasks */
774 #define ADD_EP(x) (0x1 << x)
776 struct xhci_stream_ctx {
777 /* 64-bit stream ring address, cycle state, and stream type */
779 /* offset 0x14 - 0x1f reserved for HC internal use */
783 /* Stream Context Types (section 6.4.1) - bits 3:1 of stream ctx deq ptr */
784 #define SCT_FOR_CTX(p) (((p) & 0x7) << 1)
785 /* Secondary stream array type, dequeue pointer is to a transfer ring */
787 /* Primary stream array type, dequeue pointer is to a transfer ring */
789 /* Dequeue pointer is for a secondary stream array (SSA) with 8 entries */
794 #define SCT_SSA_128 6
795 #define SCT_SSA_256 7
797 /* Assume no secondary streams for now */
798 struct xhci_stream_info {
799 struct xhci_ring **stream_rings;
800 /* Number of streams, including stream 0 (which drivers can't use) */
801 unsigned int num_streams;
802 /* The stream context array may be bigger than
803 * the number of streams the driver asked for
805 struct xhci_stream_ctx *stream_ctx_array;
806 unsigned int num_stream_ctxs;
807 dma_addr_t ctx_array_dma;
808 /* For mapping physical TRB addresses to segments in stream rings */
809 struct radix_tree_root trb_address_map;
810 struct xhci_command *free_streams_command;
813 #define SMALL_STREAM_ARRAY_SIZE 256
814 #define MEDIUM_STREAM_ARRAY_SIZE 1024
816 /* Some Intel xHCI host controllers need software to keep track of the bus
817 * bandwidth. Keep track of endpoint info here. Each root port is allocated
818 * the full bus bandwidth. We must also treat TTs (including each port under a
819 * multi-TT hub) as a separate bandwidth domain. The direct memory interface
820 * (DMI) also limits the total bandwidth (across all domains) that can be used.
822 struct xhci_bw_info {
823 /* ep_interval is zero-based */
824 unsigned int ep_interval;
825 /* mult and num_packets are one-based */
827 unsigned int num_packets;
828 unsigned int max_packet_size;
829 unsigned int max_esit_payload;
833 /* "Block" sizes in bytes the hardware uses for different device speeds.
834 * The logic in this part of the hardware limits the number of bits the hardware
835 * can use, so must represent bandwidth in a less precise manner to mimic what
836 * the scheduler hardware computes.
843 /* Each device speed has a protocol overhead (CRC, bit stuffing, etc) associated
844 * with each byte transferred. SuperSpeed devices have an initial overhead to
845 * set up bursts. These are in blocks, see above. LS overhead has already been
846 * translated into FS blocks.
848 #define DMI_OVERHEAD 8
849 #define DMI_OVERHEAD_BURST 4
850 #define SS_OVERHEAD 8
851 #define SS_OVERHEAD_BURST 32
852 #define HS_OVERHEAD 26
853 #define FS_OVERHEAD 20
854 #define LS_OVERHEAD 128
855 /* The TTs need to claim roughly twice as much bandwidth (94 bytes per
856 * microframe ~= 24Mbps) of the HS bus as the devices can actually use because
857 * of overhead associated with split transfers crossing microframe boundaries.
858 * 31 blocks is pure protocol overhead.
860 #define TT_HS_OVERHEAD (31 + 94)
861 #define TT_DMI_OVERHEAD (25 + 12)
863 /* Bandwidth limits in blocks */
864 #define FS_BW_LIMIT 1285
865 #define TT_BW_LIMIT 1320
866 #define HS_BW_LIMIT 1607
867 #define SS_BW_LIMIT_IN 3906
868 #define DMI_BW_LIMIT_IN 3906
869 #define SS_BW_LIMIT_OUT 3906
870 #define DMI_BW_LIMIT_OUT 3906
872 /* Percentage of bus bandwidth reserved for non-periodic transfers */
873 #define FS_BW_RESERVED 10
874 #define HS_BW_RESERVED 20
875 #define SS_BW_RESERVED 10
877 struct xhci_virt_ep {
878 struct xhci_ring *ring;
879 /* Related to endpoints that are configured to use stream IDs only */
880 struct xhci_stream_info *stream_info;
881 /* Temporary storage in case the configure endpoint command fails and we
882 * have to restore the device state to the previous state
884 struct xhci_ring *new_ring;
885 unsigned int ep_state;
886 #define SET_DEQ_PENDING (1 << 0)
887 #define EP_HALTED (1 << 1) /* For stall handling */
888 #define EP_HALT_PENDING (1 << 2) /* For URB cancellation */
889 /* Transitioning the endpoint to using streams, don't enqueue URBs */
890 #define EP_GETTING_STREAMS (1 << 3)
891 #define EP_HAS_STREAMS (1 << 4)
892 /* Transitioning the endpoint to not using streams, don't enqueue URBs */
893 #define EP_GETTING_NO_STREAMS (1 << 5)
894 /* ---- Related to URB cancellation ---- */
895 struct list_head cancelled_td_list;
896 struct xhci_td *stopped_td;
897 unsigned int stopped_stream;
898 /* Watchdog timer for stop endpoint command to cancel URBs */
899 struct timer_list stop_cmd_timer;
900 int stop_cmds_pending;
901 struct xhci_hcd *xhci;
902 /* Dequeue pointer and dequeue segment for a submitted Set TR Dequeue
903 * command. We'll need to update the ring's dequeue segment and dequeue
904 * pointer after the command completes.
906 struct xhci_segment *queued_deq_seg;
907 union xhci_trb *queued_deq_ptr;
909 * Sometimes the xHC can not process isochronous endpoint ring quickly
910 * enough, and it will miss some isoc tds on the ring and generate
911 * a Missed Service Error Event.
912 * Set skip flag when receive a Missed Service Error Event and
913 * process the missed tds on the endpoint ring.
916 /* Bandwidth checking storage */
917 struct xhci_bw_info bw_info;
918 struct list_head bw_endpoint_list;
919 /* Isoch Frame ID checking storage */
923 enum xhci_overhead_type {
924 LS_OVERHEAD_TYPE = 0,
929 struct xhci_interval_bw {
930 unsigned int num_packets;
931 /* Sorted by max packet size.
932 * Head of the list is the greatest max packet size.
934 struct list_head endpoints;
935 /* How many endpoints of each speed are present. */
936 unsigned int overhead[3];
939 #define XHCI_MAX_INTERVAL 16
941 struct xhci_interval_bw_table {
942 unsigned int interval0_esit_payload;
943 struct xhci_interval_bw interval_bw[XHCI_MAX_INTERVAL];
944 /* Includes reserved bandwidth for async endpoints */
945 unsigned int bw_used;
946 unsigned int ss_bw_in;
947 unsigned int ss_bw_out;
951 struct xhci_virt_device {
952 struct usb_device *udev;
954 * Commands to the hardware are passed an "input context" that
955 * tells the hardware what to change in its data structures.
956 * The hardware will return changes in an "output context" that
957 * software must allocate for the hardware. We need to keep
958 * track of input and output contexts separately because
959 * these commands might fail and we don't trust the hardware.
961 struct xhci_container_ctx *out_ctx;
962 /* Used for addressing devices and configuration changes */
963 struct xhci_container_ctx *in_ctx;
964 /* Rings saved to ensure old alt settings can be re-instated */
965 struct xhci_ring **ring_cache;
966 int num_rings_cached;
967 #define XHCI_MAX_RINGS_CACHED 31
968 struct xhci_virt_ep eps[31];
969 struct completion cmd_completion;
972 struct xhci_interval_bw_table *bw_table;
973 struct xhci_tt_bw_info *tt_info;
974 /* The current max exit latency for the enabled USB3 link states. */
979 * For each roothub, keep track of the bandwidth information for each periodic
982 * If a high speed hub is attached to the roothub, each TT associated with that
983 * hub is a separate bandwidth domain. The interval information for the
984 * endpoints on the devices under that TT will appear in the TT structure.
986 struct xhci_root_port_bw_info {
987 struct list_head tts;
988 unsigned int num_active_tts;
989 struct xhci_interval_bw_table bw_table;
992 struct xhci_tt_bw_info {
993 struct list_head tt_list;
996 struct xhci_interval_bw_table bw_table;
1002 * struct xhci_device_context_array
1003 * @dev_context_ptr array of 64-bit DMA addresses for device contexts
1005 struct xhci_device_context_array {
1006 /* 64-bit device addresses; we only write 32-bit addresses */
1007 __le64 dev_context_ptrs[MAX_HC_SLOTS];
1008 /* private xHCD pointers */
1011 /* TODO: write function to set the 64-bit device DMA address */
1013 * TODO: change this to be dynamically sized at HC mem init time since the HC
1014 * might not be able to handle the maximum number of devices possible.
1018 struct xhci_transfer_event {
1019 /* 64-bit buffer address, or immediate data */
1021 __le32 transfer_len;
1022 /* This field is interpreted differently based on the type of TRB */
1026 /* Transfer event TRB length bit mask */
1028 #define EVENT_TRB_LEN(p) ((p) & 0xffffff)
1030 /** Transfer Event bit fields **/
1031 #define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f)
1033 /* Completion Code - only applicable for some types of TRBs */
1034 #define COMP_CODE_MASK (0xff << 24)
1035 #define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24)
1036 #define COMP_SUCCESS 1
1037 /* Data Buffer Error */
1038 #define COMP_DB_ERR 2
1039 /* Babble Detected Error */
1040 #define COMP_BABBLE 3
1041 /* USB Transaction Error */
1042 #define COMP_TX_ERR 4
1043 /* TRB Error - some TRB field is invalid */
1044 #define COMP_TRB_ERR 5
1045 /* Stall Error - USB device is stalled */
1046 #define COMP_STALL 6
1047 /* Resource Error - HC doesn't have memory for that device configuration */
1048 #define COMP_ENOMEM 7
1049 /* Bandwidth Error - not enough room in schedule for this dev config */
1050 #define COMP_BW_ERR 8
1051 /* No Slots Available Error - HC ran out of device slots */
1052 #define COMP_ENOSLOTS 9
1053 /* Invalid Stream Type Error */
1054 #define COMP_STREAM_ERR 10
1055 /* Slot Not Enabled Error - doorbell rung for disabled device slot */
1056 #define COMP_EBADSLT 11
1057 /* Endpoint Not Enabled Error */
1058 #define COMP_EBADEP 12
1060 #define COMP_SHORT_TX 13
1061 /* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */
1062 #define COMP_UNDERRUN 14
1063 /* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */
1064 #define COMP_OVERRUN 15
1065 /* Virtual Function Event Ring Full Error */
1066 #define COMP_VF_FULL 16
1067 /* Parameter Error - Context parameter is invalid */
1068 #define COMP_EINVAL 17
1069 /* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */
1070 #define COMP_BW_OVER 18
1071 /* Context State Error - illegal context state transition requested */
1072 #define COMP_CTX_STATE 19
1073 /* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */
1074 #define COMP_PING_ERR 20
1075 /* Event Ring is full */
1076 #define COMP_ER_FULL 21
1077 /* Incompatible Device Error */
1078 #define COMP_DEV_ERR 22
1079 /* Missed Service Error - HC couldn't service an isoc ep within interval */
1080 #define COMP_MISSED_INT 23
1081 /* Successfully stopped command ring */
1082 #define COMP_CMD_STOP 24
1083 /* Successfully aborted current command and stopped command ring */
1084 #define COMP_CMD_ABORT 25
1085 /* Stopped - transfer was terminated by a stop endpoint command */
1086 #define COMP_STOP 26
1087 /* Same as COMP_EP_STOPPED, but the transferred length in the event is invalid */
1088 #define COMP_STOP_INVAL 27
1089 /* Same as COMP_EP_STOPPED, but a short packet detected */
1090 #define COMP_STOP_SHORT 28
1091 /* Max Exit Latency Too Large Error */
1092 #define COMP_MEL_ERR 29
1093 /* TRB type 30 reserved */
1094 /* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */
1095 #define COMP_BUFF_OVER 31
1096 /* Event Lost Error - xHC has an "internal event overrun condition" */
1097 #define COMP_ISSUES 32
1098 /* Undefined Error - reported when other error codes don't apply */
1099 #define COMP_UNKNOWN 33
1100 /* Invalid Stream ID Error */
1101 #define COMP_STRID_ERR 34
1102 /* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */
1103 #define COMP_2ND_BW_ERR 35
1104 /* Split Transaction Error */
1105 #define COMP_SPLIT_ERR 36
1107 struct xhci_link_trb {
1108 /* 64-bit segment pointer*/
1114 /* control bitfields */
1115 #define LINK_TOGGLE (0x1<<1)
1117 /* Command completion event TRB */
1118 struct xhci_event_cmd {
1119 /* Pointer to command TRB, or the value passed by the event data trb */
1125 /* flags bitmasks */
1127 /* Address device - disable SetAddress */
1128 #define TRB_BSR (1<<9)
1129 enum xhci_setup_dev {
1131 SETUP_CONTEXT_ADDRESS,
1134 /* bits 16:23 are the virtual function ID */
1135 /* bits 24:31 are the slot ID */
1136 #define TRB_TO_SLOT_ID(p) (((p) & (0xff<<24)) >> 24)
1137 #define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24)
1139 /* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */
1140 #define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1)
1141 #define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16)
1143 #define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23)
1144 #define TRB_TO_SUSPEND_PORT(p) (((p) & (1 << 23)) >> 23)
1145 #define LAST_EP_INDEX 30
1147 /* Set TR Dequeue Pointer command TRB fields, 6.4.3.9 */
1148 #define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16))
1149 #define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16)
1150 #define SCT_FOR_TRB(p) (((p) << 1) & 0x7)
1153 /* Port Status Change Event TRB fields */
1154 /* Port ID - bits 31:24 */
1155 #define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24)
1157 /* Normal TRB fields */
1158 /* transfer_len bitmasks - bits 0:16 */
1159 #define TRB_LEN(p) ((p) & 0x1ffff)
1160 /* Interrupter Target - which MSI-X vector to target the completion event at */
1161 #define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22)
1162 #define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff)
1163 #define TRB_TBC(p) (((p) & 0x3) << 7)
1164 #define TRB_TLBPC(p) (((p) & 0xf) << 16)
1166 /* Cycle bit - indicates TRB ownership by HC or HCD */
1167 #define TRB_CYCLE (1<<0)
1169 * Force next event data TRB to be evaluated before task switch.
1170 * Used to pass OS data back after a TD completes.
1172 #define TRB_ENT (1<<1)
1173 /* Interrupt on short packet */
1174 #define TRB_ISP (1<<2)
1175 /* Set PCIe no snoop attribute */
1176 #define TRB_NO_SNOOP (1<<3)
1177 /* Chain multiple TRBs into a TD */
1178 #define TRB_CHAIN (1<<4)
1179 /* Interrupt on completion */
1180 #define TRB_IOC (1<<5)
1181 /* The buffer pointer contains immediate data */
1182 #define TRB_IDT (1<<6)
1184 /* Block Event Interrupt */
1185 #define TRB_BEI (1<<9)
1187 /* Control transfer TRB specific fields */
1188 #define TRB_DIR_IN (1<<16)
1189 #define TRB_TX_TYPE(p) ((p) << 16)
1190 #define TRB_DATA_OUT 2
1191 #define TRB_DATA_IN 3
1193 /* Isochronous TRB specific fields */
1194 #define TRB_SIA (1<<31)
1195 #define TRB_FRAME_ID(p) (((p) & 0x7ff) << 20)
1197 struct xhci_generic_trb {
1202 struct xhci_link_trb link;
1203 struct xhci_transfer_event trans_event;
1204 struct xhci_event_cmd event_cmd;
1205 struct xhci_generic_trb generic;
1209 #define TRB_TYPE_BITMASK (0xfc00)
1210 #define TRB_TYPE(p) ((p) << 10)
1211 #define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10)
1213 /* bulk, interrupt, isoc scatter/gather, and control data stage */
1214 #define TRB_NORMAL 1
1215 /* setup stage for control transfers */
1217 /* data stage for control transfers */
1219 /* status stage for control transfers */
1220 #define TRB_STATUS 4
1221 /* isoc transfers */
1223 /* TRB for linking ring segments */
1225 #define TRB_EVENT_DATA 7
1226 /* Transfer Ring No-op (not for the command ring) */
1227 #define TRB_TR_NOOP 8
1229 /* Enable Slot Command */
1230 #define TRB_ENABLE_SLOT 9
1231 /* Disable Slot Command */
1232 #define TRB_DISABLE_SLOT 10
1233 /* Address Device Command */
1234 #define TRB_ADDR_DEV 11
1235 /* Configure Endpoint Command */
1236 #define TRB_CONFIG_EP 12
1237 /* Evaluate Context Command */
1238 #define TRB_EVAL_CONTEXT 13
1239 /* Reset Endpoint Command */
1240 #define TRB_RESET_EP 14
1241 /* Stop Transfer Ring Command */
1242 #define TRB_STOP_RING 15
1243 /* Set Transfer Ring Dequeue Pointer Command */
1244 #define TRB_SET_DEQ 16
1245 /* Reset Device Command */
1246 #define TRB_RESET_DEV 17
1247 /* Force Event Command (opt) */
1248 #define TRB_FORCE_EVENT 18
1249 /* Negotiate Bandwidth Command (opt) */
1250 #define TRB_NEG_BANDWIDTH 19
1251 /* Set Latency Tolerance Value Command (opt) */
1252 #define TRB_SET_LT 20
1253 /* Get port bandwidth Command */
1254 #define TRB_GET_BW 21
1255 /* Force Header Command - generate a transaction or link management packet */
1256 #define TRB_FORCE_HEADER 22
1257 /* No-op Command - not for transfer rings */
1258 #define TRB_CMD_NOOP 23
1259 /* TRB IDs 24-31 reserved */
1261 /* Transfer Event */
1262 #define TRB_TRANSFER 32
1263 /* Command Completion Event */
1264 #define TRB_COMPLETION 33
1265 /* Port Status Change Event */
1266 #define TRB_PORT_STATUS 34
1267 /* Bandwidth Request Event (opt) */
1268 #define TRB_BANDWIDTH_EVENT 35
1269 /* Doorbell Event (opt) */
1270 #define TRB_DOORBELL 36
1271 /* Host Controller Event */
1272 #define TRB_HC_EVENT 37
1273 /* Device Notification Event - device sent function wake notification */
1274 #define TRB_DEV_NOTE 38
1275 /* MFINDEX Wrap Event - microframe counter wrapped */
1276 #define TRB_MFINDEX_WRAP 39
1277 /* TRB IDs 40-47 reserved, 48-63 is vendor-defined */
1279 /* Nec vendor-specific command completion event. */
1280 #define TRB_NEC_CMD_COMP 48
1281 /* Get NEC firmware revision. */
1282 #define TRB_NEC_GET_FW 49
1284 #define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
1285 /* Above, but for __le32 types -- can avoid work by swapping constants: */
1286 #define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
1287 cpu_to_le32(TRB_TYPE(TRB_LINK)))
1288 #define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
1289 cpu_to_le32(TRB_TYPE(TRB_TR_NOOP)))
1291 #define NEC_FW_MINOR(p) (((p) >> 0) & 0xff)
1292 #define NEC_FW_MAJOR(p) (((p) >> 8) & 0xff)
1295 * TRBS_PER_SEGMENT must be a multiple of 4,
1296 * since the command ring is 64-byte aligned.
1297 * It must also be greater than 16.
1299 #define TRBS_PER_SEGMENT 256
1300 /* Allow two commands + a link TRB, along with any reserved command TRBs */
1301 #define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3)
1302 #define TRB_SEGMENT_SIZE (TRBS_PER_SEGMENT*16)
1303 #define TRB_SEGMENT_SHIFT (ilog2(TRB_SEGMENT_SIZE))
1304 /* TRB buffer pointers can't cross 64KB boundaries */
1305 #define TRB_MAX_BUFF_SHIFT 16
1306 #define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT)
1308 struct xhci_segment {
1309 union xhci_trb *trbs;
1310 /* private to HCD */
1311 struct xhci_segment *next;
1316 struct list_head td_list;
1317 struct list_head cancelled_td_list;
1319 struct xhci_segment *start_seg;
1320 union xhci_trb *first_trb;
1321 union xhci_trb *last_trb;
1322 /* actual_length of the URB has already been set */
1323 bool urb_length_set;
1326 /* xHCI command default timeout value */
1327 #define XHCI_CMD_DEFAULT_TIMEOUT (5 * HZ)
1329 /* command descriptor */
1331 struct xhci_command *command;
1332 union xhci_trb *cmd_trb;
1335 struct xhci_dequeue_state {
1336 struct xhci_segment *new_deq_seg;
1337 union xhci_trb *new_deq_ptr;
1338 int new_cycle_state;
1341 enum xhci_ring_type {
1352 struct xhci_segment *first_seg;
1353 struct xhci_segment *last_seg;
1354 union xhci_trb *enqueue;
1355 struct xhci_segment *enq_seg;
1356 unsigned int enq_updates;
1357 union xhci_trb *dequeue;
1358 struct xhci_segment *deq_seg;
1359 unsigned int deq_updates;
1360 struct list_head td_list;
1362 * Write the cycle state into the TRB cycle field to give ownership of
1363 * the TRB to the host controller (if we are the producer), or to check
1364 * if we own the TRB (if we are the consumer). See section 4.9.1.
1367 unsigned int stream_id;
1368 unsigned int num_segs;
1369 unsigned int num_trbs_free;
1370 unsigned int num_trbs_free_temp;
1371 enum xhci_ring_type type;
1372 bool last_td_was_short;
1373 struct radix_tree_root *trb_address_map;
1376 struct xhci_erst_entry {
1377 /* 64-bit event ring segment address */
1385 struct xhci_erst_entry *entries;
1386 unsigned int num_entries;
1387 /* xhci->event_ring keeps track of segment dma addresses */
1388 dma_addr_t erst_dma_addr;
1389 /* Num entries the ERST can contain */
1390 unsigned int erst_size;
1393 struct xhci_scratchpad {
1397 dma_addr_t *sp_dma_buffers;
1403 struct xhci_td *td[0];
1407 * Each segment table entry is 4*32bits long. 1K seems like an ok size:
1408 * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
1409 * meaning 64 ring segments.
1410 * Initial allocated size of the ERST, in number of entries */
1411 #define ERST_NUM_SEGS 1
1412 /* Initial allocated size of the ERST, in number of entries */
1413 #define ERST_SIZE 64
1414 /* Initial number of event segment rings allocated */
1415 #define ERST_ENTRIES 1
1416 /* Poll every 60 seconds */
1417 #define POLL_TIMEOUT 60
1418 /* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */
1419 #define XHCI_STOP_EP_CMD_TIMEOUT 5
1420 /* XXX: Make these module parameters */
1437 struct list_head list;
1440 struct xhci_bus_state {
1441 unsigned long bus_suspended;
1442 unsigned long next_statechange;
1444 /* Port suspend arrays are indexed by the portnum of the fake roothub */
1445 /* ports suspend status arrays - max 31 ports for USB2, 15 for USB3 */
1447 u32 suspended_ports;
1448 u32 port_remote_wakeup;
1449 unsigned long resume_done[USB_MAXCHILDREN];
1450 /* which ports have started to resume */
1451 unsigned long resuming_ports;
1452 /* Which ports are waiting on RExit to U0 transition. */
1453 unsigned long rexit_ports;
1454 struct completion rexit_done[USB_MAXCHILDREN];
1459 * It can take up to 20 ms to transition from RExit to U0 on the
1460 * Intel Lynx Point LP xHCI host.
1462 #define XHCI_MAX_REXIT_TIMEOUT (20 * 1000)
1464 static inline unsigned int hcd_index(struct usb_hcd *hcd)
1466 if (hcd->speed == HCD_USB3)
1472 /* There is one xhci_hcd structure per controller */
1474 struct usb_hcd *main_hcd;
1475 struct usb_hcd *shared_hcd;
1476 /* glue to PCI and HCD framework */
1477 struct xhci_cap_regs __iomem *cap_regs;
1478 struct xhci_op_regs __iomem *op_regs;
1479 struct xhci_run_regs __iomem *run_regs;
1480 struct xhci_doorbell_array __iomem *dba;
1481 /* Our HCD's current interrupter register set */
1482 struct xhci_intr_reg __iomem *ir_set;
1484 /* Cached register copies of read-only HC data */
1493 /* packed release number */
1497 u8 max_interrupters;
1502 /* 4KB min, 128MB max */
1504 /* Valid values are 12 to 20, inclusive */
1508 struct msix_entry *msix_entries;
1509 /* optional clock */
1511 /* data structures */
1512 struct xhci_device_context_array *dcbaa;
1513 struct xhci_ring *cmd_ring;
1514 unsigned int cmd_ring_state;
1515 #define CMD_RING_STATE_RUNNING (1 << 0)
1516 #define CMD_RING_STATE_ABORTED (1 << 1)
1517 #define CMD_RING_STATE_STOPPED (1 << 2)
1518 struct list_head cmd_list;
1519 unsigned int cmd_ring_reserved_trbs;
1520 struct timer_list cmd_timer;
1521 struct xhci_command *current_cmd;
1522 struct xhci_ring *event_ring;
1523 struct xhci_erst erst;
1525 struct xhci_scratchpad *scratchpad;
1526 /* Store LPM test failed devices' information */
1527 struct list_head lpm_failed_devs;
1529 /* slot enabling and address device helpers */
1530 /* these are not thread safe so use mutex */
1532 struct completion addr_dev;
1534 /* For USB 3.0 LPM enable/disable. */
1535 struct xhci_command *lpm_command;
1536 /* Internal mirror of the HW's dcbaa */
1537 struct xhci_virt_device *devs[MAX_HC_SLOTS];
1538 /* For keeping track of bandwidth domains per roothub. */
1539 struct xhci_root_port_bw_info *rh_bw;
1542 struct dma_pool *device_pool;
1543 struct dma_pool *segment_pool;
1544 struct dma_pool *small_streams_pool;
1545 struct dma_pool *medium_streams_pool;
1547 /* Host controller watchdog timer structures */
1548 unsigned int xhc_state;
1552 /* Host controller is dying - not responding to commands. "I'm not dead yet!"
1554 * xHC interrupts have been disabled and a watchdog timer will (or has already)
1555 * halt the xHCI host, and complete all URBs with an -ESHUTDOWN code. Any code
1556 * that sees this status (other than the timer that set it) should stop touching
1557 * hardware immediately. Interrupt handlers should return immediately when
1558 * they see this status (any time they drop and re-acquire xhci->lock).
1559 * xhci_urb_dequeue() should call usb_hcd_check_unlink_urb() and return without
1560 * putting the TD on the canceled list, etc.
1562 * There are no reports of xHCI host controllers that display this issue.
1564 #define XHCI_STATE_DYING (1 << 0)
1565 #define XHCI_STATE_HALTED (1 << 1)
1568 unsigned int quirks;
1569 #define XHCI_LINK_TRB_QUIRK (1 << 0)
1570 #define XHCI_RESET_EP_QUIRK (1 << 1)
1571 #define XHCI_NEC_HOST (1 << 2)
1572 #define XHCI_AMD_PLL_FIX (1 << 3)
1573 #define XHCI_SPURIOUS_SUCCESS (1 << 4)
1575 * Certain Intel host controllers have a limit to the number of endpoint
1576 * contexts they can handle. Ideally, they would signal that they can't handle
1577 * anymore endpoint contexts by returning a Resource Error for the Configure
1578 * Endpoint command, but they don't. Instead they expect software to keep track
1579 * of the number of active endpoints for them, across configure endpoint
1580 * commands, reset device commands, disable slot commands, and address device
1583 #define XHCI_EP_LIMIT_QUIRK (1 << 5)
1584 #define XHCI_BROKEN_MSI (1 << 6)
1585 #define XHCI_RESET_ON_RESUME (1 << 7)
1586 #define XHCI_SW_BW_CHECKING (1 << 8)
1587 #define XHCI_AMD_0x96_HOST (1 << 9)
1588 #define XHCI_TRUST_TX_LENGTH (1 << 10)
1589 #define XHCI_LPM_SUPPORT (1 << 11)
1590 #define XHCI_INTEL_HOST (1 << 12)
1591 #define XHCI_SPURIOUS_REBOOT (1 << 13)
1592 #define XHCI_COMP_MODE_QUIRK (1 << 14)
1593 #define XHCI_AVOID_BEI (1 << 15)
1594 #define XHCI_PLAT (1 << 16)
1595 #define XHCI_SLOW_SUSPEND (1 << 17)
1596 #define XHCI_SPURIOUS_WAKEUP (1 << 18)
1597 /* For controllers with a broken beyond repair streams implementation */
1598 #define XHCI_BROKEN_STREAMS (1 << 19)
1599 #define XHCI_PME_STUCK_QUIRK (1 << 20)
1600 unsigned int num_active_eps;
1601 unsigned int limit_active_eps;
1602 /* There are two roothubs to keep track of bus suspend info for */
1603 struct xhci_bus_state bus_state[2];
1604 /* Is each xHCI roothub port a USB 3.0, USB 2.0, or USB 1.1 port? */
1606 /* Array of pointers to USB 3.0 PORTSC registers */
1607 __le32 __iomem **usb3_ports;
1608 unsigned int num_usb3_ports;
1609 /* Array of pointers to USB 2.0 PORTSC registers */
1610 __le32 __iomem **usb2_ports;
1611 unsigned int num_usb2_ports;
1612 /* support xHCI 0.96 spec USB2 software LPM */
1613 unsigned sw_lpm_support:1;
1614 /* support xHCI 1.0 spec USB2 hardware LPM */
1615 unsigned hw_lpm_support:1;
1616 /* cached usb2 extened protocol capabilites */
1618 unsigned int num_ext_caps;
1619 /* Compliance Mode Recovery Data */
1620 struct timer_list comp_mode_recovery_timer;
1622 /* Compliance Mode Timer Triggered every 2 seconds */
1623 #define COMP_MODE_RCVRY_MSECS 2000
1626 /* Platform specific overrides to generic XHCI hc_driver ops */
1627 struct xhci_driver_overrides {
1628 size_t extra_priv_size;
1629 int (*reset)(struct usb_hcd *hcd);
1630 int (*start)(struct usb_hcd *hcd);
1633 #define XHCI_CFC_DELAY 10
1635 /* convert between an HCD pointer and the corresponding EHCI_HCD */
1636 static inline struct xhci_hcd *hcd_to_xhci(struct usb_hcd *hcd)
1638 struct usb_hcd *primary_hcd;
1640 if (usb_hcd_is_primary_hcd(hcd))
1643 primary_hcd = hcd->primary_hcd;
1645 return (struct xhci_hcd *) (primary_hcd->hcd_priv);
1648 static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd *xhci)
1650 return xhci->main_hcd;
1653 #define xhci_dbg(xhci, fmt, args...) \
1654 dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1655 #define xhci_err(xhci, fmt, args...) \
1656 dev_err(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1657 #define xhci_warn(xhci, fmt, args...) \
1658 dev_warn(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1659 #define xhci_warn_ratelimited(xhci, fmt, args...) \
1660 dev_warn_ratelimited(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1661 #define xhci_info(xhci, fmt, args...) \
1662 dev_info(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1665 * Registers should always be accessed with double word or quad word accesses.
1667 * Some xHCI implementations may support 64-bit address pointers. Registers
1668 * with 64-bit address pointers should be written to with dword accesses by
1669 * writing the low dword first (ptr[0]), then the high dword (ptr[1]) second.
1670 * xHCI implementations that do not support 64-bit address pointers will ignore
1671 * the high dword, and write order is irrelevant.
1673 static inline u64 xhci_read_64(const struct xhci_hcd *xhci,
1674 __le64 __iomem *regs)
1676 __u32 __iomem *ptr = (__u32 __iomem *) regs;
1677 u64 val_lo = readl(ptr);
1678 u64 val_hi = readl(ptr + 1);
1679 return val_lo + (val_hi << 32);
1681 static inline void xhci_write_64(struct xhci_hcd *xhci,
1682 const u64 val, __le64 __iomem *regs)
1684 __u32 __iomem *ptr = (__u32 __iomem *) regs;
1685 u32 val_lo = lower_32_bits(val);
1686 u32 val_hi = upper_32_bits(val);
1688 writel(val_lo, ptr);
1689 writel(val_hi, ptr + 1);
1692 static inline int xhci_link_trb_quirk(struct xhci_hcd *xhci)
1694 return xhci->quirks & XHCI_LINK_TRB_QUIRK;
1697 /* xHCI debugging */
1698 void xhci_print_ir_set(struct xhci_hcd *xhci, int set_num);
1699 void xhci_print_registers(struct xhci_hcd *xhci);
1700 void xhci_dbg_regs(struct xhci_hcd *xhci);
1701 void xhci_print_run_regs(struct xhci_hcd *xhci);
1702 void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb);
1703 void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb);
1704 void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg);
1705 void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring);
1706 void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst);
1707 void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci);
1708 void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring);
1709 void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, unsigned int last_ep);
1710 char *xhci_get_slot_state(struct xhci_hcd *xhci,
1711 struct xhci_container_ctx *ctx);
1712 void xhci_dbg_ep_rings(struct xhci_hcd *xhci,
1713 unsigned int slot_id, unsigned int ep_index,
1714 struct xhci_virt_ep *ep);
1715 void xhci_dbg_trace(struct xhci_hcd *xhci, void (*trace)(struct va_format *),
1716 const char *fmt, ...);
1718 /* xHCI memory management */
1719 void xhci_mem_cleanup(struct xhci_hcd *xhci);
1720 int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags);
1721 void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id);
1722 int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, struct usb_device *udev, gfp_t flags);
1723 int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev);
1724 void xhci_copy_ep0_dequeue_into_input_ctx(struct xhci_hcd *xhci,
1725 struct usb_device *udev);
1726 unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc);
1727 unsigned int xhci_get_endpoint_address(unsigned int ep_index);
1728 unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc);
1729 unsigned int xhci_get_endpoint_flag_from_index(unsigned int ep_index);
1730 unsigned int xhci_last_valid_endpoint(u32 added_ctxs);
1731 void xhci_endpoint_zero(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_host_endpoint *ep);
1732 void xhci_drop_ep_from_interval_table(struct xhci_hcd *xhci,
1733 struct xhci_bw_info *ep_bw,
1734 struct xhci_interval_bw_table *bw_table,
1735 struct usb_device *udev,
1736 struct xhci_virt_ep *virt_ep,
1737 struct xhci_tt_bw_info *tt_info);
1738 void xhci_update_tt_active_eps(struct xhci_hcd *xhci,
1739 struct xhci_virt_device *virt_dev,
1740 int old_active_eps);
1741 void xhci_clear_endpoint_bw_info(struct xhci_bw_info *bw_info);
1742 void xhci_update_bw_info(struct xhci_hcd *xhci,
1743 struct xhci_container_ctx *in_ctx,
1744 struct xhci_input_control_ctx *ctrl_ctx,
1745 struct xhci_virt_device *virt_dev);
1746 void xhci_endpoint_copy(struct xhci_hcd *xhci,
1747 struct xhci_container_ctx *in_ctx,
1748 struct xhci_container_ctx *out_ctx,
1749 unsigned int ep_index);
1750 void xhci_slot_copy(struct xhci_hcd *xhci,
1751 struct xhci_container_ctx *in_ctx,
1752 struct xhci_container_ctx *out_ctx);
1753 int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev,
1754 struct usb_device *udev, struct usb_host_endpoint *ep,
1756 void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring);
1757 int xhci_ring_expansion(struct xhci_hcd *xhci, struct xhci_ring *ring,
1758 unsigned int num_trbs, gfp_t flags);
1759 void xhci_free_or_cache_endpoint_ring(struct xhci_hcd *xhci,
1760 struct xhci_virt_device *virt_dev,
1761 unsigned int ep_index);
1762 struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
1763 unsigned int num_stream_ctxs,
1764 unsigned int num_streams, gfp_t flags);
1765 void xhci_free_stream_info(struct xhci_hcd *xhci,
1766 struct xhci_stream_info *stream_info);
1767 void xhci_setup_streams_ep_input_ctx(struct xhci_hcd *xhci,
1768 struct xhci_ep_ctx *ep_ctx,
1769 struct xhci_stream_info *stream_info);
1770 void xhci_setup_no_streams_ep_input_ctx(struct xhci_ep_ctx *ep_ctx,
1771 struct xhci_virt_ep *ep);
1772 void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci,
1773 struct xhci_virt_device *virt_dev, bool drop_control_ep);
1774 struct xhci_ring *xhci_dma_to_transfer_ring(
1775 struct xhci_virt_ep *ep,
1777 struct xhci_ring *xhci_stream_id_to_ring(
1778 struct xhci_virt_device *dev,
1779 unsigned int ep_index,
1780 unsigned int stream_id);
1781 struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci,
1782 bool allocate_in_ctx, bool allocate_completion,
1784 void xhci_urb_free_priv(struct urb_priv *urb_priv);
1785 void xhci_free_command(struct xhci_hcd *xhci,
1786 struct xhci_command *command);
1788 /* xHCI host controller glue */
1789 typedef void (*xhci_get_quirks_t)(struct device *, struct xhci_hcd *);
1790 int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, int usec);
1791 void xhci_quiesce(struct xhci_hcd *xhci);
1792 int xhci_halt(struct xhci_hcd *xhci);
1793 int xhci_reset(struct xhci_hcd *xhci);
1794 int xhci_init(struct usb_hcd *hcd);
1795 int xhci_run(struct usb_hcd *hcd);
1796 void xhci_stop(struct usb_hcd *hcd);
1797 void xhci_shutdown(struct usb_hcd *hcd);
1798 int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks);
1799 void xhci_init_driver(struct hc_driver *drv,
1800 const struct xhci_driver_overrides *over);
1803 int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup);
1804 int xhci_resume(struct xhci_hcd *xhci, bool hibernated);
1806 #define xhci_suspend NULL
1807 #define xhci_resume NULL
1810 int xhci_get_frame(struct usb_hcd *hcd);
1811 irqreturn_t xhci_irq(struct usb_hcd *hcd);
1812 irqreturn_t xhci_msi_irq(int irq, void *hcd);
1813 int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev);
1814 void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev);
1815 int xhci_alloc_tt_info(struct xhci_hcd *xhci,
1816 struct xhci_virt_device *virt_dev,
1817 struct usb_device *hdev,
1818 struct usb_tt *tt, gfp_t mem_flags);
1819 int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
1820 struct usb_host_endpoint **eps, unsigned int num_eps,
1821 unsigned int num_streams, gfp_t mem_flags);
1822 int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
1823 struct usb_host_endpoint **eps, unsigned int num_eps,
1825 int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev);
1826 int xhci_enable_device(struct usb_hcd *hcd, struct usb_device *udev);
1827 int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev);
1828 int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd,
1829 struct usb_device *udev, int enable);
1830 int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
1831 struct usb_tt *tt, gfp_t mem_flags);
1832 int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
1833 int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
1834 int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
1835 int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
1836 void xhci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep);
1837 int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev);
1838 int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
1839 void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
1841 /* xHCI ring, segment, TRB, and TD functions */
1842 dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
1843 struct xhci_segment *trb_in_td(struct xhci_hcd *xhci,
1844 struct xhci_segment *start_seg, union xhci_trb *start_trb,
1845 union xhci_trb *end_trb, dma_addr_t suspect_dma, bool debug);
1846 int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code);
1847 void xhci_ring_cmd_db(struct xhci_hcd *xhci);
1848 int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd,
1849 u32 trb_type, u32 slot_id);
1850 int xhci_queue_address_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
1851 dma_addr_t in_ctx_ptr, u32 slot_id, enum xhci_setup_dev);
1852 int xhci_queue_vendor_command(struct xhci_hcd *xhci, struct xhci_command *cmd,
1853 u32 field1, u32 field2, u32 field3, u32 field4);
1854 int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd,
1855 int slot_id, unsigned int ep_index, int suspend);
1856 int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
1857 int slot_id, unsigned int ep_index);
1858 int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
1859 int slot_id, unsigned int ep_index);
1860 int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
1861 int slot_id, unsigned int ep_index);
1862 int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags,
1863 struct urb *urb, int slot_id, unsigned int ep_index);
1864 int xhci_queue_configure_endpoint(struct xhci_hcd *xhci,
1865 struct xhci_command *cmd, dma_addr_t in_ctx_ptr, u32 slot_id,
1866 bool command_must_succeed);
1867 int xhci_queue_evaluate_context(struct xhci_hcd *xhci, struct xhci_command *cmd,
1868 dma_addr_t in_ctx_ptr, u32 slot_id, bool command_must_succeed);
1869 int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd,
1870 int slot_id, unsigned int ep_index);
1871 int xhci_queue_reset_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
1873 void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
1874 unsigned int slot_id, unsigned int ep_index,
1875 unsigned int stream_id, struct xhci_td *cur_td,
1876 struct xhci_dequeue_state *state);
1877 void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
1878 unsigned int slot_id, unsigned int ep_index,
1879 unsigned int stream_id,
1880 struct xhci_dequeue_state *deq_state);
1881 void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
1882 unsigned int ep_index, struct xhci_td *td);
1883 void xhci_queue_config_ep_quirk(struct xhci_hcd *xhci,
1884 unsigned int slot_id, unsigned int ep_index,
1885 struct xhci_dequeue_state *deq_state);
1886 void xhci_stop_endpoint_command_watchdog(unsigned long arg);
1887 void xhci_handle_command_timeout(unsigned long data);
1889 void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, unsigned int slot_id,
1890 unsigned int ep_index, unsigned int stream_id);
1891 void xhci_cleanup_command_queue(struct xhci_hcd *xhci);
1893 /* xHCI roothub code */
1894 void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,
1895 int port_id, u32 link_state);
1896 int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd,
1897 struct usb_device *udev, enum usb3_link_state state);
1898 int xhci_disable_usb3_lpm_timeout(struct usb_hcd *hcd,
1899 struct usb_device *udev, enum usb3_link_state state);
1900 void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array,
1901 int port_id, u32 port_bit);
1902 int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
1903 char *buf, u16 wLength);
1904 int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);
1905 int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1);
1908 int xhci_bus_suspend(struct usb_hcd *hcd);
1909 int xhci_bus_resume(struct usb_hcd *hcd);
1911 #define xhci_bus_suspend NULL
1912 #define xhci_bus_resume NULL
1913 #endif /* CONFIG_PM */
1915 u32 xhci_port_state_to_neutral(u32 state);
1916 int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
1918 void xhci_ring_device(struct xhci_hcd *xhci, int slot_id);
1921 struct xhci_input_control_ctx *xhci_get_input_control_ctx(struct xhci_container_ctx *ctx);
1922 struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx);
1923 struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, unsigned int ep_index);
1925 #endif /* __LINUX_XHCI_HCD_H */