2 * xHCI host controller driver
4 * Copyright (C) 2008 Intel Corp.
7 * Some code borrowed from the Linux EHCI driver.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #ifndef __LINUX_XHCI_HCD_H
24 #define __LINUX_XHCI_HCD_H
26 #include <linux/usb.h>
27 #include <linux/timer.h>
29 #include "../core/hcd.h"
30 /* Code sharing between pci-quirks and xhci hcd */
31 #include "xhci-ext-caps.h"
33 /* xHCI PCI Configuration Registers */
34 #define XHCI_SBRN_OFFSET (0x60)
36 /* Max number of USB devices for any host controller - limit in section 6.1 */
37 #define MAX_HC_SLOTS 256
38 /* Section 5.3.3 - MaxPorts */
39 #define MAX_HC_PORTS 127
42 * xHCI register interface.
43 * This corresponds to the eXtensible Host Controller Interface (xHCI)
44 * Revision 0.95 specification
46 * Registers should always be accessed with double word or quad word accesses.
48 * Some xHCI implementations may support 64-bit address pointers. Registers
49 * with 64-bit address pointers should be written to with dword accesses by
50 * writing the low dword first (ptr[0]), then the high dword (ptr[1]) second.
51 * xHCI implementations that do not support 64-bit address pointers will ignore
52 * the high dword, and write order is irrelevant.
56 * struct xhci_cap_regs - xHCI Host Controller Capability Registers.
57 * @hc_capbase: length of the capabilities register and HC version number
58 * @hcs_params1: HCSPARAMS1 - Structural Parameters 1
59 * @hcs_params2: HCSPARAMS2 - Structural Parameters 2
60 * @hcs_params3: HCSPARAMS3 - Structural Parameters 3
61 * @hcc_params: HCCPARAMS - Capability Parameters
62 * @db_off: DBOFF - Doorbell array offset
63 * @run_regs_off: RTSOFF - Runtime register space offset
65 struct xhci_cap_regs {
73 /* Reserved up to (CAPLENGTH - 0x1C) */
76 /* hc_capbase bitmasks */
77 /* bits 7:0 - how long is the Capabilities register */
78 #define HC_LENGTH(p) XHCI_HC_LENGTH(p)
80 #define HC_VERSION(p) (((p) >> 16) & 0xffff)
82 /* HCSPARAMS1 - hcs_params1 - bitmasks */
83 /* bits 0:7, Max Device Slots */
84 #define HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff)
85 #define HCS_SLOTS_MASK 0xff
86 /* bits 8:18, Max Interrupters */
87 #define HCS_MAX_INTRS(p) (((p) >> 8) & 0x7ff)
88 /* bits 24:31, Max Ports - max value is 0x7F = 127 ports */
89 #define HCS_MAX_PORTS(p) (((p) >> 24) & 0x7f)
91 /* HCSPARAMS2 - hcs_params2 - bitmasks */
92 /* bits 0:3, frames or uframes that SW needs to queue transactions
93 * ahead of the HW to meet periodic deadlines */
94 #define HCS_IST(p) (((p) >> 0) & 0xf)
95 /* bits 4:7, max number of Event Ring segments */
96 #define HCS_ERST_MAX(p) (((p) >> 4) & 0xf)
97 /* bit 26 Scratchpad restore - for save/restore HW state - not used yet */
98 /* bits 27:31 number of Scratchpad buffers SW must allocate for the HW */
100 /* HCSPARAMS3 - hcs_params3 - bitmasks */
101 /* bits 0:7, Max U1 to U0 latency for the roothub ports */
102 #define HCS_U1_LATENCY(p) (((p) >> 0) & 0xff)
103 /* bits 16:31, Max U2 to U0 latency for the roothub ports */
104 #define HCS_U2_LATENCY(p) (((p) >> 16) & 0xffff)
106 /* HCCPARAMS - hcc_params - bitmasks */
107 /* true: HC can use 64-bit address pointers */
108 #define HCC_64BIT_ADDR(p) ((p) & (1 << 0))
109 /* true: HC can do bandwidth negotiation */
110 #define HCC_BANDWIDTH_NEG(p) ((p) & (1 << 1))
111 /* true: HC uses 64-byte Device Context structures
112 * FIXME 64-byte context structures aren't supported yet.
114 #define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2))
115 /* true: HC has port power switches */
116 #define HCC_PPC(p) ((p) & (1 << 3))
117 /* true: HC has port indicators */
118 #define HCS_INDICATOR(p) ((p) & (1 << 4))
119 /* true: HC has Light HC Reset Capability */
120 #define HCC_LIGHT_RESET(p) ((p) & (1 << 5))
121 /* true: HC supports latency tolerance messaging */
122 #define HCC_LTC(p) ((p) & (1 << 6))
123 /* true: no secondary Stream ID Support */
124 #define HCC_NSS(p) ((p) & (1 << 7))
125 /* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */
126 #define HCC_MAX_PSA (1 << ((((p) >> 12) & 0xf) + 1))
127 /* Extended Capabilities pointer from PCI base - section 5.3.6 */
128 #define HCC_EXT_CAPS(p) XHCI_HCC_EXT_CAPS(p)
130 /* db_off bitmask - bits 0:1 reserved */
131 #define DBOFF_MASK (~0x3)
133 /* run_regs_off bitmask - bits 0:4 reserved */
134 #define RTSOFF_MASK (~0x1f)
137 /* Number of registers per port */
138 #define NUM_PORT_REGS 4
141 * struct xhci_op_regs - xHCI Host Controller Operational Registers.
142 * @command: USBCMD - xHC command register
143 * @status: USBSTS - xHC status register
144 * @page_size: This indicates the page size that the host controller
145 * supports. If bit n is set, the HC supports a page size
146 * of 2^(n+12), up to a 128MB page size.
147 * 4K is the minimum page size.
148 * @cmd_ring: CRP - 64-bit Command Ring Pointer
149 * @dcbaa_ptr: DCBAAP - 64-bit Device Context Base Address Array Pointer
150 * @config_reg: CONFIG - Configure Register
151 * @port_status_base: PORTSCn - base address for Port Status and Control
152 * Each port has a Port Status and Control register,
153 * followed by a Port Power Management Status and Control
154 * register, a Port Link Info register, and a reserved
156 * @port_power_base: PORTPMSCn - base address for
157 * Port Power Management Status and Control
158 * @port_link_base: PORTLIn - base address for Port Link Info (current
159 * Link PM state and control) for USB 2.1 and USB 3.0
162 struct xhci_op_regs {
168 u32 dev_notification;
170 /* rsvd: offset 0x20-2F */
174 /* rsvd: offset 0x3C-3FF */
176 /* port 1 registers, which serve as a base address for other ports */
177 u32 port_status_base;
181 /* registers for ports 2-255 */
182 u32 reserved6[NUM_PORT_REGS*254];
185 /* USBCMD - USB command - command bitmasks */
186 /* start/stop HC execution - do not write unless HC is halted*/
187 #define CMD_RUN XHCI_CMD_RUN
188 /* Reset HC - resets internal HC state machine and all registers (except
189 * PCI config regs). HC does NOT drive a USB reset on the downstream ports.
190 * The xHCI driver must reinitialize the xHC after setting this bit.
192 #define CMD_RESET (1 << 1)
193 /* Event Interrupt Enable - a '1' allows interrupts from the host controller */
194 #define CMD_EIE XHCI_CMD_EIE
195 /* Host System Error Interrupt Enable - get out-of-band signal for HC errors */
196 #define CMD_HSEIE XHCI_CMD_HSEIE
197 /* bits 4:6 are reserved (and should be preserved on writes). */
198 /* light reset (port status stays unchanged) - reset completed when this is 0 */
199 #define CMD_LRESET (1 << 7)
200 /* FIXME: ignoring host controller save/restore state for now. */
201 #define CMD_CSS (1 << 8)
202 #define CMD_CRS (1 << 9)
203 /* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
204 #define CMD_EWE XHCI_CMD_EWE
205 /* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root
206 * hubs are in U3 (selective suspend), disconnect, disabled, or powered-off.
207 * '0' means the xHC can power it off if all ports are in the disconnect,
208 * disabled, or powered-off state.
210 #define CMD_PM_INDEX (1 << 11)
211 /* bits 12:31 are reserved (and should be preserved on writes). */
213 /* USBSTS - USB status - status bitmasks */
214 /* HC not running - set to 1 when run/stop bit is cleared. */
215 #define STS_HALT XHCI_STS_HALT
216 /* serious error, e.g. PCI parity error. The HC will clear the run/stop bit. */
217 #define STS_FATAL (1 << 2)
218 /* event interrupt - clear this prior to clearing any IP flags in IR set*/
219 #define STS_EINT (1 << 3)
220 /* port change detect */
221 #define STS_PORT (1 << 4)
222 /* bits 5:7 reserved and zeroed */
223 /* save state status - '1' means xHC is saving state */
224 #define STS_SAVE (1 << 8)
225 /* restore state status - '1' means xHC is restoring state */
226 #define STS_RESTORE (1 << 9)
227 /* true: save or restore error */
228 #define STS_SRE (1 << 10)
229 /* true: Controller Not Ready to accept doorbell or op reg writes after reset */
230 #define STS_CNR XHCI_STS_CNR
231 /* true: internal Host Controller Error - SW needs to reset and reinitialize */
232 #define STS_HCE (1 << 12)
233 /* bits 13:31 reserved and should be preserved */
236 * DNCTRL - Device Notification Control Register - dev_notification bitmasks
237 * Generate a device notification event when the HC sees a transaction with a
238 * notification type that matches a bit set in this bit field.
240 #define DEV_NOTE_MASK (0xffff)
241 #define ENABLE_DEV_NOTE(x) (1 << x)
242 /* Most of the device notification types should only be used for debug.
243 * SW does need to pay attention to function wake notifications.
245 #define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1)
247 /* CRCR - Command Ring Control Register - cmd_ring bitmasks */
248 /* bit 0 is the command ring cycle state */
249 /* stop ring operation after completion of the currently executing command */
250 #define CMD_RING_PAUSE (1 << 1)
251 /* stop ring immediately - abort the currently executing command */
252 #define CMD_RING_ABORT (1 << 2)
253 /* true: command ring is running */
254 #define CMD_RING_RUNNING (1 << 3)
255 /* bits 4:5 reserved and should be preserved */
256 /* Command Ring pointer - bit mask for the lower 32 bits. */
257 #define CMD_RING_ADDR_MASK (0xffffffc0)
259 /* CONFIG - Configure Register - config_reg bitmasks */
260 /* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */
261 #define MAX_DEVS(p) ((p) & 0xff)
262 /* bits 8:31 - reserved and should be preserved */
264 /* PORTSC - Port Status and Control Register - port_status_base bitmasks */
265 /* true: device connected */
266 #define PORT_CONNECT (1 << 0)
267 /* true: port enabled */
268 #define PORT_PE (1 << 1)
269 /* bit 2 reserved and zeroed */
270 /* true: port has an over-current condition */
271 #define PORT_OC (1 << 3)
272 /* true: port reset signaling asserted */
273 #define PORT_RESET (1 << 4)
274 /* Port Link State - bits 5:8
275 * A read gives the current link PM state of the port,
276 * a write with Link State Write Strobe set sets the link state.
278 /* true: port has power (see HCC_PPC) */
279 #define PORT_POWER (1 << 9)
280 /* bits 10:13 indicate device speed:
281 * 0 - undefined speed - port hasn't be initialized by a reset yet
288 #define DEV_SPEED_MASK (0xf << 10)
289 #define XDEV_FS (0x1 << 10)
290 #define XDEV_LS (0x2 << 10)
291 #define XDEV_HS (0x3 << 10)
292 #define XDEV_SS (0x4 << 10)
293 #define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10))
294 #define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
295 #define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS)
296 #define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
297 #define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
298 /* Bits 20:23 in the Slot Context are the speed for the device */
299 #define SLOT_SPEED_FS (XDEV_FS << 10)
300 #define SLOT_SPEED_LS (XDEV_LS << 10)
301 #define SLOT_SPEED_HS (XDEV_HS << 10)
302 #define SLOT_SPEED_SS (XDEV_SS << 10)
303 /* Port Indicator Control */
304 #define PORT_LED_OFF (0 << 14)
305 #define PORT_LED_AMBER (1 << 14)
306 #define PORT_LED_GREEN (2 << 14)
307 #define PORT_LED_MASK (3 << 14)
308 /* Port Link State Write Strobe - set this when changing link state */
309 #define PORT_LINK_STROBE (1 << 16)
310 /* true: connect status change */
311 #define PORT_CSC (1 << 17)
312 /* true: port enable change */
313 #define PORT_PEC (1 << 18)
314 /* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port
315 * into an enabled state, and the device into the default state. A "warm" reset
316 * also resets the link, forcing the device through the link training sequence.
317 * SW can also look at the Port Reset register to see when warm reset is done.
319 #define PORT_WRC (1 << 19)
320 /* true: over-current change */
321 #define PORT_OCC (1 << 20)
322 /* true: reset change - 1 to 0 transition of PORT_RESET */
323 #define PORT_RC (1 << 21)
324 /* port link status change - set on some port link state transitions:
326 * ------------------------------------------------------------------------------
327 * - U3 to Resume Wakeup signaling from a device
328 * - Resume to Recovery to U0 USB 3.0 device resume
329 * - Resume to U0 USB 2.0 device resume
330 * - U3 to Recovery to U0 Software resume of USB 3.0 device complete
331 * - U3 to U0 Software resume of USB 2.0 device complete
332 * - U2 to U0 L1 resume of USB 2.1 device complete
333 * - U0 to U0 (???) L1 entry rejection by USB 2.1 device
334 * - U0 to disabled L1 entry error with USB 2.1 device
335 * - Any state to inactive Error on USB 3.0 port
337 #define PORT_PLC (1 << 22)
338 /* port configure error change - port failed to configure its link partner */
339 #define PORT_CEC (1 << 23)
340 /* bit 24 reserved */
341 /* wake on connect (enable) */
342 #define PORT_WKCONN_E (1 << 25)
343 /* wake on disconnect (enable) */
344 #define PORT_WKDISC_E (1 << 26)
345 /* wake on over-current (enable) */
346 #define PORT_WKOC_E (1 << 27)
347 /* bits 28:29 reserved */
348 /* true: device is removable - for USB 3.0 roothub emulation */
349 #define PORT_DEV_REMOVE (1 << 30)
350 /* Initiate a warm port reset - complete when PORT_WRC is '1' */
351 #define PORT_WR (1 << 31)
353 /* Port Power Management Status and Control - port_power_base bitmasks */
354 /* Inactivity timer value for transitions into U1, in microseconds.
355 * Timeout can be up to 127us. 0xFF means an infinite timeout.
357 #define PORT_U1_TIMEOUT(p) ((p) & 0xff)
358 /* Inactivity timer value for transitions into U2 */
359 #define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8)
360 /* Bits 24:31 for port testing */
364 * struct xhci_intr_reg - Interrupt Register Set
365 * @irq_pending: IMAN - Interrupt Management Register. Used to enable
366 * interrupts and check for pending interrupts.
367 * @irq_control: IMOD - Interrupt Moderation Register.
368 * Used to throttle interrupts.
369 * @erst_size: Number of segments in the Event Ring Segment Table (ERST).
370 * @erst_base: ERST base address.
371 * @erst_dequeue: Event ring dequeue pointer.
373 * Each interrupter (defined by a MSI-X vector) has an event ring and an Event
374 * Ring Segment Table (ERST) associated with it. The event ring is comprised of
375 * multiple segments of the same size. The HC places events on the ring and
376 * "updates the Cycle bit in the TRBs to indicate to software the current
377 * position of the Enqueue Pointer." The HCD (Linux) processes those events and
378 * updates the dequeue pointer.
380 struct xhci_intr_reg {
389 /* irq_pending bitmasks */
390 #define ER_IRQ_PENDING(p) ((p) & 0x1)
391 /* bits 2:31 need to be preserved */
392 /* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */
393 #define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe)
394 #define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2)
395 #define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2))
397 /* irq_control bitmasks */
398 /* Minimum interval between interrupts (in 250ns intervals). The interval
399 * between interrupts will be longer if there are no events on the event ring.
400 * Default is 4000 (1 ms).
402 #define ER_IRQ_INTERVAL_MASK (0xffff)
403 /* Counter used to count down the time to the next interrupt - HW use only */
404 #define ER_IRQ_COUNTER_MASK (0xffff << 16)
406 /* erst_size bitmasks */
407 /* Preserve bits 16:31 of erst_size */
408 #define ERST_SIZE_MASK (0xffff << 16)
410 /* erst_dequeue bitmasks */
411 /* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
412 * where the current dequeue pointer lies. This is an optional HW hint.
414 #define ERST_DESI_MASK (0x7)
415 /* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by
416 * a work queue (or delayed service routine)?
418 #define ERST_EHB (1 << 3)
419 #define ERST_PTR_MASK (0xf)
422 * struct xhci_run_regs
424 * MFINDEX - current microframe number
426 * Section 5.5 Host Controller Runtime Registers:
427 * "Software should read and write these registers using only Dword (32 bit)
428 * or larger accesses"
430 struct xhci_run_regs {
431 u32 microframe_index;
433 struct xhci_intr_reg ir_set[128];
437 * struct doorbell_array
441 struct xhci_doorbell_array {
445 #define DB_TARGET_MASK 0xFFFFFF00
446 #define DB_STREAM_ID_MASK 0x0000FFFF
447 #define DB_TARGET_HOST 0x0
448 #define DB_STREAM_ID_HOST 0x0
449 #define DB_MASK (0xff << 8)
451 /* Endpoint Target - bits 0:7 */
452 #define EPI_TO_DB(p) (((p) + 1) & 0xff)
456 * struct xhci_slot_ctx
457 * @dev_info: Route string, device speed, hub info, and last valid endpoint
458 * @dev_info2: Max exit latency for device number, root hub port number
459 * @tt_info: tt_info is used to construct split transaction tokens
460 * @dev_state: slot state and device address
462 * Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context
463 * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
464 * reserved at the end of the slot context for HC internal use.
466 struct xhci_slot_ctx {
471 /* offset 0x10 to 0x1f reserved for HC internal use */
475 /* dev_info bitmasks */
476 /* Route String - 0:19 */
477 #define ROUTE_STRING_MASK (0xfffff)
478 /* Device speed - values defined by PORTSC Device Speed field - 20:23 */
479 #define DEV_SPEED (0xf << 20)
480 /* bit 24 reserved */
481 /* Is this LS/FS device connected through a HS hub? - bit 25 */
482 #define DEV_MTT (0x1 << 25)
483 /* Set if the device is a hub - bit 26 */
484 #define DEV_HUB (0x1 << 26)
485 /* Index of the last valid endpoint context in this device context - 27:31 */
486 #define LAST_CTX_MASK (0x1f << 27)
487 #define LAST_CTX(p) ((p) << 27)
488 #define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1)
489 #define SLOT_FLAG (1 << 0)
490 #define EP0_FLAG (1 << 1)
492 /* dev_info2 bitmasks */
493 /* Max Exit Latency (ms) - worst case time to wake up all links in dev path */
494 #define MAX_EXIT (0xffff)
495 /* Root hub port number that is needed to access the USB device */
496 #define ROOT_HUB_PORT(p) (((p) & 0xff) << 16)
498 /* tt_info bitmasks */
500 * TT Hub Slot ID - for low or full speed devices attached to a high-speed hub
501 * The Slot ID of the hub that isolates the high speed signaling from
502 * this low or full-speed device. '0' if attached to root hub port.
504 #define TT_SLOT (0xff)
506 * The number of the downstream facing port of the high-speed hub
507 * '0' if the device is not low or full speed.
509 #define TT_PORT (0xff << 8)
511 /* dev_state bitmasks */
512 /* USB device address - assigned by the HC */
513 #define DEV_ADDR_MASK (0xff)
514 /* bits 8:26 reserved */
516 #define SLOT_STATE (0x1f << 27)
517 #define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27)
522 * @ep_info: endpoint state, streams, mult, and interval information.
523 * @ep_info2: information on endpoint type, max packet size, max burst size,
524 * error count, and whether the HC will force an event for all
526 * @deq: 64-bit ring dequeue pointer address. If the endpoint only
527 * defines one stream, this points to the endpoint transfer ring.
528 * Otherwise, it points to a stream context array, which has a
529 * ring pointer for each flow.
531 * Average TRB lengths for the endpoint ring and
532 * max payload within an Endpoint Service Interval Time (ESIT).
534 * Endpoint Context - section 6.2.1.2. This assumes the HC uses 32-byte context
535 * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
536 * reserved at the end of the endpoint context for HC internal use.
543 /* offset 0x14 - 0x1f reserved for HC internal use */
547 /* ep_info bitmasks */
549 * Endpoint State - bits 0:2
552 * 2 - halted due to halt condition - ok to manipulate endpoint ring
557 #define EP_STATE_MASK (0xf)
558 #define EP_STATE_DISABLED 0
559 #define EP_STATE_RUNNING 1
560 #define EP_STATE_HALTED 2
561 #define EP_STATE_STOPPED 3
562 #define EP_STATE_ERROR 4
563 /* Mult - Max number of burtst within an interval, in EP companion desc. */
564 #define EP_MULT(p) ((p & 0x3) << 8)
565 /* bits 10:14 are Max Primary Streams */
566 /* bit 15 is Linear Stream Array */
567 /* Interval - period between requests to an endpoint - 125u increments. */
568 #define EP_INTERVAL(p) ((p & 0xff) << 16)
570 /* ep_info2 bitmasks */
572 * Force Event - generate transfer events for all TRBs for this endpoint
573 * This will tell the HC to ignore the IOC and ISP flags (for debugging only).
575 #define FORCE_EVENT (0x1)
576 #define ERROR_COUNT(p) (((p) & 0x3) << 1)
577 #define EP_TYPE(p) ((p) << 3)
578 #define ISOC_OUT_EP 1
579 #define BULK_OUT_EP 2
586 /* bit 7 is Host Initiate Disable - for disabling stream selection */
587 #define MAX_BURST(p) (((p)&0xff) << 8)
588 #define MAX_PACKET(p) (((p)&0xffff) << 16)
592 * struct xhci_device_control
593 * Input/Output context; see section 6.2.5.
595 * @drop_context: set the bit of the endpoint context you want to disable
596 * @add_context: set the bit of the endpoint context you want to enable
598 struct xhci_device_control {
602 struct xhci_slot_ctx slot;
603 struct xhci_ep_ctx ep[31];
606 /* drop context bitmasks */
607 #define DROP_EP(x) (0x1 << x)
608 /* add context bitmasks */
609 #define ADD_EP(x) (0x1 << x)
612 struct xhci_virt_device {
614 * Commands to the hardware are passed an "input context" that
615 * tells the hardware what to change in its data structures.
616 * The hardware will return changes in an "output context" that
617 * software must allocate for the hardware. We need to keep
618 * track of input and output contexts separately because
619 * these commands might fail and we don't trust the hardware.
621 struct xhci_device_control *out_ctx;
622 dma_addr_t out_ctx_dma;
623 /* Used for addressing devices and configuration changes */
624 struct xhci_device_control *in_ctx;
625 dma_addr_t in_ctx_dma;
626 /* FIXME when stream support is added */
627 struct xhci_ring *ep_rings[31];
628 /* Temporary storage in case the configure endpoint command fails and we
629 * have to restore the device state to the previous state
631 struct xhci_ring *new_ep_rings[31];
632 struct completion cmd_completion;
633 /* Status of the last command issued for this device */
639 * struct xhci_device_context_array
640 * @dev_context_ptr array of 64-bit DMA addresses for device contexts
642 struct xhci_device_context_array {
643 /* 64-bit device addresses; we only write 32-bit addresses */
644 u32 dev_context_ptrs[2*MAX_HC_SLOTS];
645 /* private xHCD pointers */
648 /* TODO: write function to set the 64-bit device DMA address */
650 * TODO: change this to be dynamically sized at HC mem init time since the HC
651 * might not be able to handle the maximum number of devices possible.
655 struct xhci_stream_ctx {
656 /* 64-bit stream ring address, cycle state, and stream type */
658 /* offset 0x14 - 0x1f reserved for HC internal use */
663 struct xhci_transfer_event {
664 /* 64-bit buffer address, or immediate data */
667 /* This field is interpreted differently based on the type of TRB */
671 /** Transfer Event bit fields **/
672 #define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f)
674 /* Completion Code - only applicable for some types of TRBs */
675 #define COMP_CODE_MASK (0xff << 24)
676 #define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24)
677 #define COMP_SUCCESS 1
678 /* Data Buffer Error */
679 #define COMP_DB_ERR 2
680 /* Babble Detected Error */
681 #define COMP_BABBLE 3
682 /* USB Transaction Error */
683 #define COMP_TX_ERR 4
684 /* TRB Error - some TRB field is invalid */
685 #define COMP_TRB_ERR 5
686 /* Stall Error - USB device is stalled */
688 /* Resource Error - HC doesn't have memory for that device configuration */
689 #define COMP_ENOMEM 7
690 /* Bandwidth Error - not enough room in schedule for this dev config */
691 #define COMP_BW_ERR 8
692 /* No Slots Available Error - HC ran out of device slots */
693 #define COMP_ENOSLOTS 9
694 /* Invalid Stream Type Error */
695 #define COMP_STREAM_ERR 10
696 /* Slot Not Enabled Error - doorbell rung for disabled device slot */
697 #define COMP_EBADSLT 11
698 /* Endpoint Not Enabled Error */
699 #define COMP_EBADEP 12
701 #define COMP_SHORT_TX 13
702 /* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */
703 #define COMP_UNDERRUN 14
704 /* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */
705 #define COMP_OVERRUN 15
706 /* Virtual Function Event Ring Full Error */
707 #define COMP_VF_FULL 16
708 /* Parameter Error - Context parameter is invalid */
709 #define COMP_EINVAL 17
710 /* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */
711 #define COMP_BW_OVER 18
712 /* Context State Error - illegal context state transition requested */
713 #define COMP_CTX_STATE 19
714 /* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */
715 #define COMP_PING_ERR 20
716 /* Event Ring is full */
717 #define COMP_ER_FULL 21
718 /* Missed Service Error - HC couldn't service an isoc ep within interval */
719 #define COMP_MISSED_INT 23
720 /* Successfully stopped command ring */
721 #define COMP_CMD_STOP 24
722 /* Successfully aborted current command and stopped command ring */
723 #define COMP_CMD_ABORT 25
724 /* Stopped - transfer was terminated by a stop endpoint command */
726 /* Same as COMP_EP_STOPPED, but the transfered length in the event is invalid */
727 #define COMP_STOP_INVAL 27
728 /* Control Abort Error - Debug Capability - control pipe aborted */
729 #define COMP_DBG_ABORT 28
730 /* TRB type 29 and 30 reserved */
731 /* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */
732 #define COMP_BUFF_OVER 31
733 /* Event Lost Error - xHC has an "internal event overrun condition" */
734 #define COMP_ISSUES 32
735 /* Undefined Error - reported when other error codes don't apply */
736 #define COMP_UNKNOWN 33
737 /* Invalid Stream ID Error */
738 #define COMP_STRID_ERR 34
739 /* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */
740 /* FIXME - check for this */
741 #define COMP_2ND_BW_ERR 35
742 /* Split Transaction Error */
743 #define COMP_SPLIT_ERR 36
745 struct xhci_link_trb {
746 /* 64-bit segment pointer*/
752 /* control bitfields */
753 #define LINK_TOGGLE (0x1<<1)
755 /* Command completion event TRB */
756 struct xhci_event_cmd {
757 /* Pointer to command TRB, or the value passed by the event data trb */
764 /* bits 16:23 are the virtual function ID */
765 /* bits 24:31 are the slot ID */
766 #define TRB_TO_SLOT_ID(p) (((p) & (0xff<<24)) >> 24)
767 #define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24)
769 /* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */
770 #define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1)
771 #define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16)
774 /* Port Status Change Event TRB fields */
775 /* Port ID - bits 31:24 */
776 #define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24)
778 /* Normal TRB fields */
779 /* transfer_len bitmasks - bits 0:16 */
780 #define TRB_LEN(p) ((p) & 0x1ffff)
781 /* TD size - number of bytes remaining in the TD (including this TRB):
782 * bits 17 - 21. Shift the number of bytes by 10. */
783 #define TD_REMAINDER(p) ((((p) >> 10) & 0x1f) << 17)
784 /* Interrupter Target - which MSI-X vector to target the completion event at */
785 #define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22)
786 #define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff)
788 /* Cycle bit - indicates TRB ownership by HC or HCD */
789 #define TRB_CYCLE (1<<0)
791 * Force next event data TRB to be evaluated before task switch.
792 * Used to pass OS data back after a TD completes.
794 #define TRB_ENT (1<<1)
795 /* Interrupt on short packet */
796 #define TRB_ISP (1<<2)
797 /* Set PCIe no snoop attribute */
798 #define TRB_NO_SNOOP (1<<3)
799 /* Chain multiple TRBs into a TD */
800 #define TRB_CHAIN (1<<4)
801 /* Interrupt on completion */
802 #define TRB_IOC (1<<5)
803 /* The buffer pointer contains immediate data */
804 #define TRB_IDT (1<<6)
807 /* Control transfer TRB specific fields */
808 #define TRB_DIR_IN (1<<16)
810 struct xhci_generic_trb {
815 struct xhci_link_trb link;
816 struct xhci_transfer_event trans_event;
817 struct xhci_event_cmd event_cmd;
818 struct xhci_generic_trb generic;
822 #define TRB_TYPE_BITMASK (0xfc00)
823 #define TRB_TYPE(p) ((p) << 10)
825 /* bulk, interrupt, isoc scatter/gather, and control data stage */
827 /* setup stage for control transfers */
829 /* data stage for control transfers */
831 /* status stage for control transfers */
835 /* TRB for linking ring segments */
837 #define TRB_EVENT_DATA 7
838 /* Transfer Ring No-op (not for the command ring) */
839 #define TRB_TR_NOOP 8
841 /* Enable Slot Command */
842 #define TRB_ENABLE_SLOT 9
843 /* Disable Slot Command */
844 #define TRB_DISABLE_SLOT 10
845 /* Address Device Command */
846 #define TRB_ADDR_DEV 11
847 /* Configure Endpoint Command */
848 #define TRB_CONFIG_EP 12
849 /* Evaluate Context Command */
850 #define TRB_EVAL_CONTEXT 13
851 /* Reset Transfer Ring Command */
852 #define TRB_RESET_RING 14
853 /* Stop Transfer Ring Command */
854 #define TRB_STOP_RING 15
855 /* Set Transfer Ring Dequeue Pointer Command */
856 #define TRB_SET_DEQ 16
857 /* Reset Device Command */
858 #define TRB_RESET_DEV 17
859 /* Force Event Command (opt) */
860 #define TRB_FORCE_EVENT 18
861 /* Negotiate Bandwidth Command (opt) */
862 #define TRB_NEG_BANDWIDTH 19
863 /* Set Latency Tolerance Value Command (opt) */
864 #define TRB_SET_LT 20
865 /* Get port bandwidth Command */
866 #define TRB_GET_BW 21
867 /* Force Header Command - generate a transaction or link management packet */
868 #define TRB_FORCE_HEADER 22
869 /* No-op Command - not for transfer rings */
870 #define TRB_CMD_NOOP 23
871 /* TRB IDs 24-31 reserved */
874 #define TRB_TRANSFER 32
875 /* Command Completion Event */
876 #define TRB_COMPLETION 33
877 /* Port Status Change Event */
878 #define TRB_PORT_STATUS 34
879 /* Bandwidth Request Event (opt) */
880 #define TRB_BANDWIDTH_EVENT 35
881 /* Doorbell Event (opt) */
882 #define TRB_DOORBELL 36
883 /* Host Controller Event */
884 #define TRB_HC_EVENT 37
885 /* Device Notification Event - device sent function wake notification */
886 #define TRB_DEV_NOTE 38
887 /* MFINDEX Wrap Event - microframe counter wrapped */
888 #define TRB_MFINDEX_WRAP 39
889 /* TRB IDs 40-47 reserved, 48-63 is vendor-defined */
892 * TRBS_PER_SEGMENT must be a multiple of 4,
893 * since the command ring is 64-byte aligned.
894 * It must also be greater than 16.
896 #define TRBS_PER_SEGMENT 64
897 #define SEGMENT_SIZE (TRBS_PER_SEGMENT*16)
898 /* TRB buffer pointers can't cross 64KB boundaries */
899 #define TRB_MAX_BUFF_SHIFT 16
900 #define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT)
902 struct xhci_segment {
903 union xhci_trb *trbs;
905 struct xhci_segment *next;
910 struct list_head td_list;
911 struct list_head cancelled_td_list;
913 struct xhci_segment *start_seg;
914 union xhci_trb *first_trb;
915 union xhci_trb *last_trb;
919 struct xhci_segment *first_seg;
920 union xhci_trb *enqueue;
921 struct xhci_segment *enq_seg;
922 unsigned int enq_updates;
923 union xhci_trb *dequeue;
924 struct xhci_segment *deq_seg;
925 unsigned int deq_updates;
926 struct list_head td_list;
927 /* ---- Related to URB cancellation ---- */
928 struct list_head cancelled_td_list;
929 unsigned int cancels_pending;
931 #define SET_DEQ_PENDING (1 << 0)
932 /* The TRB that was last reported in a stopped endpoint ring */
933 union xhci_trb *stopped_trb;
934 struct xhci_td *stopped_td;
936 * Write the cycle state into the TRB cycle field to give ownership of
937 * the TRB to the host controller (if we are the producer), or to check
938 * if we own the TRB (if we are the consumer). See section 4.9.1.
943 struct xhci_erst_entry {
944 /* 64-bit event ring segment address */
952 struct xhci_erst_entry *entries;
953 unsigned int num_entries;
954 /* xhci->event_ring keeps track of segment dma addresses */
955 dma_addr_t erst_dma_addr;
956 /* Num entries the ERST can contain */
957 unsigned int erst_size;
961 * Each segment table entry is 4*32bits long. 1K seems like an ok size:
962 * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
963 * meaning 64 ring segments.
964 * Initial allocated size of the ERST, in number of entries */
965 #define ERST_NUM_SEGS 1
966 /* Initial allocated size of the ERST, in number of entries */
968 /* Initial number of event segment rings allocated */
969 #define ERST_ENTRIES 1
970 /* Poll every 60 seconds */
971 #define POLL_TIMEOUT 60
972 /* XXX: Make these module parameters */
975 /* There is one ehci_hci structure per controller */
977 /* glue to PCI and HCD framework */
978 struct xhci_cap_regs __iomem *cap_regs;
979 struct xhci_op_regs __iomem *op_regs;
980 struct xhci_run_regs __iomem *run_regs;
981 struct xhci_doorbell_array __iomem *dba;
982 /* Our HCD's current interrupter register set */
983 struct xhci_intr_reg __iomem *ir_set;
985 /* Cached register copies of read-only HC data */
993 /* packed release number */
1002 /* 4KB min, 128MB max */
1004 /* Valid values are 12 to 20, inclusive */
1006 /* only one MSI vector for now, but might need more later */
1008 struct msix_entry *msix_entries;
1009 /* data structures */
1010 struct xhci_device_context_array *dcbaa;
1011 struct xhci_ring *cmd_ring;
1012 struct xhci_ring *event_ring;
1013 struct xhci_erst erst;
1014 /* slot enabling and address device helpers */
1015 struct completion addr_dev;
1017 /* Internal mirror of the HW's dcbaa */
1018 struct xhci_virt_device *devs[MAX_HC_SLOTS];
1021 struct dma_pool *device_pool;
1022 struct dma_pool *segment_pool;
1024 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
1025 /* Poll the rings - for debugging */
1026 struct timer_list event_ring_timer;
1030 int noops_submitted;
1035 /* For testing purposes */
1036 #define NUM_TEST_NOOPS 0
1038 /* convert between an HCD pointer and the corresponding EHCI_HCD */
1039 static inline struct xhci_hcd *hcd_to_xhci(struct usb_hcd *hcd)
1041 return (struct xhci_hcd *) (hcd->hcd_priv);
1044 static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd *xhci)
1046 return container_of((void *) xhci, struct usb_hcd, hcd_priv);
1049 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
1050 #define XHCI_DEBUG 1
1052 #define XHCI_DEBUG 0
1055 #define xhci_dbg(xhci, fmt, args...) \
1056 do { if (XHCI_DEBUG) dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args); } while (0)
1057 #define xhci_info(xhci, fmt, args...) \
1058 do { if (XHCI_DEBUG) dev_info(xhci_to_hcd(xhci)->self.controller , fmt , ## args); } while (0)
1059 #define xhci_err(xhci, fmt, args...) \
1060 dev_err(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1061 #define xhci_warn(xhci, fmt, args...) \
1062 dev_warn(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1064 /* TODO: copied from ehci.h - can be refactored? */
1065 /* xHCI spec says all registers are little endian */
1066 static inline unsigned int xhci_readl(const struct xhci_hcd *xhci,
1067 __u32 __iomem *regs)
1071 static inline void xhci_writel(struct xhci_hcd *xhci,
1072 const unsigned int val, __u32 __iomem *regs)
1074 if (!in_interrupt())
1076 "`MEM_WRITE_DWORD(3'b000, 32'h%p, 32'h%0x, 4'hf);\n",
1081 /* xHCI debugging */
1082 void xhci_print_ir_set(struct xhci_hcd *xhci, struct xhci_intr_reg *ir_set, int set_num);
1083 void xhci_print_registers(struct xhci_hcd *xhci);
1084 void xhci_dbg_regs(struct xhci_hcd *xhci);
1085 void xhci_print_run_regs(struct xhci_hcd *xhci);
1086 void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb);
1087 void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb);
1088 void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg);
1089 void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring);
1090 void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst);
1091 void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci);
1092 void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring);
1093 void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_device_control *ctx, dma_addr_t dma, unsigned int last_ep);
1095 /* xHCI memory managment */
1096 void xhci_mem_cleanup(struct xhci_hcd *xhci);
1097 int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags);
1098 void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id);
1099 int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, struct usb_device *udev, gfp_t flags);
1100 int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev);
1101 unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc);
1102 unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc);
1103 void xhci_endpoint_zero(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_host_endpoint *ep);
1104 int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev,
1105 struct usb_device *udev, struct usb_host_endpoint *ep,
1107 void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring);
1111 int xhci_register_pci(void);
1112 void xhci_unregister_pci(void);
1115 /* xHCI host controller glue */
1116 int xhci_halt(struct xhci_hcd *xhci);
1117 int xhci_reset(struct xhci_hcd *xhci);
1118 int xhci_init(struct usb_hcd *hcd);
1119 int xhci_run(struct usb_hcd *hcd);
1120 void xhci_stop(struct usb_hcd *hcd);
1121 void xhci_shutdown(struct usb_hcd *hcd);
1122 int xhci_get_frame(struct usb_hcd *hcd);
1123 irqreturn_t xhci_irq(struct usb_hcd *hcd);
1124 int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev);
1125 void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev);
1126 int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev);
1127 int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
1128 int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
1129 int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
1130 int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
1131 int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
1132 void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
1134 /* xHCI ring, segment, TRB, and TD functions */
1135 dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
1136 void xhci_ring_cmd_db(struct xhci_hcd *xhci);
1137 void *xhci_setup_one_noop(struct xhci_hcd *xhci);
1138 void xhci_handle_event(struct xhci_hcd *xhci);
1139 void xhci_set_hc_event_deq(struct xhci_hcd *xhci);
1140 int xhci_queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id);
1141 int xhci_queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
1143 int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, int slot_id,
1144 unsigned int ep_index);
1145 int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
1146 int slot_id, unsigned int ep_index);
1147 int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
1148 int slot_id, unsigned int ep_index);
1149 int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
1152 /* xHCI roothub code */
1153 int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
1154 char *buf, u16 wLength);
1155 int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);
1157 #endif /* __LINUX_XHCI_HCD_H */