1 /* 2 * USB HOST XHCI Controller 3 * 4 * Based on xHCI host controller driver in linux-kernel 5 * by Sarah Sharp. 6 * 7 * Copyright (C) 2008 Intel Corp. 8 * Author: Sarah Sharp 9 * 10 * Copyright (C) 2013 Samsung Electronics Co.Ltd 11 * Authors: Vivek Gautam <gautam.vivek@samsung.com> 12 * Vikas Sajjan <vikas.sajjan@samsung.com> 13 * 14 * SPDX-License-Identifier: GPL-2.0+ 15 */ 16 17 #ifndef HOST_XHCI_H_ 18 #define HOST_XHCI_H_ 19 20 #include <asm/cache.h> 21 #include <asm/io.h> 22 #include <linux/list.h> 23 #include <linux/compat.h> 24 25 #define MAX_EP_CTX_NUM 31 26 #define XHCI_ALIGNMENT 64 27 /* Generic timeout for XHCI events */ 28 #define XHCI_TIMEOUT 5000 29 /* Max number of USB devices for any host controller - limit in section 6.1 */ 30 #define MAX_HC_SLOTS 256 31 /* Section 5.3.3 - MaxPorts */ 32 #define MAX_HC_PORTS 127 33 34 /* Up to 16 ms to halt an HC */ 35 #define XHCI_MAX_HALT_USEC (16*1000) 36 37 #define XHCI_MAX_RESET_USEC (250*1000) 38 39 /* 40 * These bits are Read Only (RO) and should be saved and written to the 41 * registers: 0, 3, 10:13, 30 42 * connect status, over-current status, port speed, and device removable. 43 * connect status and port speed are also sticky - meaning they're in 44 * the AUX well and they aren't changed by a hot, warm, or cold reset. 45 */ 46 #define XHCI_PORT_RO ((1 << 0) | (1 << 3) | (0xf << 10) | (1 << 30)) 47 /* 48 * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: 49 * bits 5:8, 9, 14:15, 25:27 50 * link state, port power, port indicator state, "wake on" enable state 51 */ 52 #define XHCI_PORT_RWS ((0xf << 5) | (1 << 9) | (0x3 << 14) | (0x7 << 25)) 53 /* 54 * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: 55 * bit 4 (port reset) 56 */ 57 #define XHCI_PORT_RW1S ((1 << 4)) 58 /* 59 * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: 60 * bits 1, 17, 18, 19, 20, 21, 22, 23 61 * port enable/disable, and 62 * change bits: connect, PED, 63 * warm port reset changed (reserved zero for USB 2.0 ports), 64 * over-current, reset, link state, and L1 change 65 */ 66 #define XHCI_PORT_RW1CS ((1 << 1) | (0x7f << 17)) 67 /* 68 * Bit 16 is RW, and writing a '1' to it causes the link state control to be 69 * latched in 70 */ 71 #define XHCI_PORT_RW ((1 << 16)) 72 /* 73 * These bits are Reserved Zero (RsvdZ) and zero should be written to them: 74 * bits 2, 24, 28:31 75 */ 76 #define XHCI_PORT_RZ ((1 << 2) | (1 << 24) | (0xf << 28)) 77 78 /* 79 * XHCI Register Space. 80 */ 81 struct xhci_hccr { 82 uint32_t cr_capbase; 83 uint32_t cr_hcsparams1; 84 uint32_t cr_hcsparams2; 85 uint32_t cr_hcsparams3; 86 uint32_t cr_hccparams; 87 uint32_t cr_dboff; 88 uint32_t cr_rtsoff; 89 90 /* hc_capbase bitmasks */ 91 /* bits 7:0 - how long is the Capabilities register */ 92 #define HC_LENGTH(p) XHCI_HC_LENGTH(p) 93 /* bits 31:16 */ 94 #define HC_VERSION(p) (((p) >> 16) & 0xffff) 95 96 /* HCSPARAMS1 - hcs_params1 - bitmasks */ 97 /* bits 0:7, Max Device Slots */ 98 #define HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff) 99 #define HCS_SLOTS_MASK 0xff 100 /* bits 8:18, Max Interrupters */ 101 #define HCS_MAX_INTRS(p) (((p) >> 8) & 0x7ff) 102 /* bits 24:31, Max Ports - max value is 0x7F = 127 ports */ 103 #define HCS_MAX_PORTS_SHIFT 24 104 #define HCS_MAX_PORTS_MASK (0x7f << HCS_MAX_PORTS_SHIFT) 105 #define HCS_MAX_PORTS(p) (((p) >> 24) & 0x7f) 106 107 /* HCSPARAMS2 - hcs_params2 - bitmasks */ 108 /* bits 0:3, frames or uframes that SW needs to queue transactions 109 * ahead of the HW to meet periodic deadlines */ 110 #define HCS_IST(p) (((p) >> 0) & 0xf) 111 /* bits 4:7, max number of Event Ring segments */ 112 #define HCS_ERST_MAX(p) (((p) >> 4) & 0xf) 113 /* bit 26 Scratchpad restore - for save/restore HW state - not used yet */ 114 /* bits 27:31 number of Scratchpad buffers SW must allocate for the HW */ 115 #define HCS_MAX_SCRATCHPAD(p) (((p) >> 27) & 0x1f) 116 117 /* HCSPARAMS3 - hcs_params3 - bitmasks */ 118 /* bits 0:7, Max U1 to U0 latency for the roothub ports */ 119 #define HCS_U1_LATENCY(p) (((p) >> 0) & 0xff) 120 /* bits 16:31, Max U2 to U0 latency for the roothub ports */ 121 #define HCS_U2_LATENCY(p) (((p) >> 16) & 0xffff) 122 123 /* HCCPARAMS - hcc_params - bitmasks */ 124 /* true: HC can use 64-bit address pointers */ 125 #define HCC_64BIT_ADDR(p) ((p) & (1 << 0)) 126 /* true: HC can do bandwidth negotiation */ 127 #define HCC_BANDWIDTH_NEG(p) ((p) & (1 << 1)) 128 /* true: HC uses 64-byte Device Context structures 129 * FIXME 64-byte context structures aren't supported yet. 130 */ 131 #define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2)) 132 /* true: HC has port power switches */ 133 #define HCC_PPC(p) ((p) & (1 << 3)) 134 /* true: HC has port indicators */ 135 #define HCS_INDICATOR(p) ((p) & (1 << 4)) 136 /* true: HC has Light HC Reset Capability */ 137 #define HCC_LIGHT_RESET(p) ((p) & (1 << 5)) 138 /* true: HC supports latency tolerance messaging */ 139 #define HCC_LTC(p) ((p) & (1 << 6)) 140 /* true: no secondary Stream ID Support */ 141 #define HCC_NSS(p) ((p) & (1 << 7)) 142 /* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */ 143 #define HCC_MAX_PSA(p) (1 << ((((p) >> 12) & 0xf) + 1)) 144 /* Extended Capabilities pointer from PCI base - section 5.3.6 */ 145 #define HCC_EXT_CAPS(p) XHCI_HCC_EXT_CAPS(p) 146 147 /* db_off bitmask - bits 0:1 reserved */ 148 #define DBOFF_MASK (~0x3) 149 150 /* run_regs_off bitmask - bits 0:4 reserved */ 151 #define RTSOFF_MASK (~0x1f) 152 153 }; 154 155 struct xhci_hcor_port_regs { 156 volatile uint32_t or_portsc; 157 volatile uint32_t or_portpmsc; 158 volatile uint32_t or_portli; 159 volatile uint32_t reserved_3; 160 }; 161 162 struct xhci_hcor { 163 volatile uint32_t or_usbcmd; 164 volatile uint32_t or_usbsts; 165 volatile uint32_t or_pagesize; 166 volatile uint32_t reserved_0[2]; 167 volatile uint32_t or_dnctrl; 168 volatile uint64_t or_crcr; 169 volatile uint32_t reserved_1[4]; 170 volatile uint64_t or_dcbaap; 171 volatile uint32_t or_config; 172 volatile uint32_t reserved_2[241]; 173 struct xhci_hcor_port_regs portregs[CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS]; 174 175 uint32_t reserved_4[CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS * 254]; 176 }; 177 178 /* USBCMD - USB command - command bitmasks */ 179 /* start/stop HC execution - do not write unless HC is halted*/ 180 #define CMD_RUN XHCI_CMD_RUN 181 /* Reset HC - resets internal HC state machine and all registers (except 182 * PCI config regs). HC does NOT drive a USB reset on the downstream ports. 183 * The xHCI driver must reinitialize the xHC after setting this bit. 184 */ 185 #define CMD_RESET (1 << 1) 186 /* Event Interrupt Enable - a '1' allows interrupts from the host controller */ 187 #define CMD_EIE XHCI_CMD_EIE 188 /* Host System Error Interrupt Enable - get out-of-band signal for HC errors */ 189 #define CMD_HSEIE XHCI_CMD_HSEIE 190 /* bits 4:6 are reserved (and should be preserved on writes). */ 191 /* light reset (port status stays unchanged) - reset completed when this is 0 */ 192 #define CMD_LRESET (1 << 7) 193 /* host controller save/restore state. */ 194 #define CMD_CSS (1 << 8) 195 #define CMD_CRS (1 << 9) 196 /* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */ 197 #define CMD_EWE XHCI_CMD_EWE 198 /* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root 199 * hubs are in U3 (selective suspend), disconnect, disabled, or powered-off. 200 * '0' means the xHC can power it off if all ports are in the disconnect, 201 * disabled, or powered-off state. 202 */ 203 #define CMD_PM_INDEX (1 << 11) 204 /* bits 12:31 are reserved (and should be preserved on writes). */ 205 206 /* USBSTS - USB status - status bitmasks */ 207 /* HC not running - set to 1 when run/stop bit is cleared. */ 208 #define STS_HALT XHCI_STS_HALT 209 /* serious error, e.g. PCI parity error. The HC will clear the run/stop bit. */ 210 #define STS_FATAL (1 << 2) 211 /* event interrupt - clear this prior to clearing any IP flags in IR set*/ 212 #define STS_EINT (1 << 3) 213 /* port change detect */ 214 #define STS_PORT (1 << 4) 215 /* bits 5:7 reserved and zeroed */ 216 /* save state status - '1' means xHC is saving state */ 217 #define STS_SAVE (1 << 8) 218 /* restore state status - '1' means xHC is restoring state */ 219 #define STS_RESTORE (1 << 9) 220 /* true: save or restore error */ 221 #define STS_SRE (1 << 10) 222 /* true: Controller Not Ready to accept doorbell or op reg writes after reset */ 223 #define STS_CNR XHCI_STS_CNR 224 /* true: internal Host Controller Error - SW needs to reset and reinitialize */ 225 #define STS_HCE (1 << 12) 226 /* bits 13:31 reserved and should be preserved */ 227 228 /* 229 * DNCTRL - Device Notification Control Register - dev_notification bitmasks 230 * Generate a device notification event when the HC sees a transaction with a 231 * notification type that matches a bit set in this bit field. 232 */ 233 #define DEV_NOTE_MASK (0xffff) 234 #define ENABLE_DEV_NOTE(x) (1 << (x)) 235 /* Most of the device notification types should only be used for debug. 236 * SW does need to pay attention to function wake notifications. 237 */ 238 #define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1) 239 240 /* CRCR - Command Ring Control Register - cmd_ring bitmasks */ 241 /* bit 0 is the command ring cycle state */ 242 /* stop ring operation after completion of the currently executing command */ 243 #define CMD_RING_PAUSE (1 << 1) 244 /* stop ring immediately - abort the currently executing command */ 245 #define CMD_RING_ABORT (1 << 2) 246 /* true: command ring is running */ 247 #define CMD_RING_RUNNING (1 << 3) 248 /* bits 4:5 reserved and should be preserved */ 249 /* Command Ring pointer - bit mask for the lower 32 bits. */ 250 #define CMD_RING_RSVD_BITS (0x3f) 251 252 /* CONFIG - Configure Register - config_reg bitmasks */ 253 /* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */ 254 #define MAX_DEVS(p) ((p) & 0xff) 255 /* bits 8:31 - reserved and should be preserved */ 256 257 /* PORTSC - Port Status and Control Register - port_status_base bitmasks */ 258 /* true: device connected */ 259 #define PORT_CONNECT (1 << 0) 260 /* true: port enabled */ 261 #define PORT_PE (1 << 1) 262 /* bit 2 reserved and zeroed */ 263 /* true: port has an over-current condition */ 264 #define PORT_OC (1 << 3) 265 /* true: port reset signaling asserted */ 266 #define PORT_RESET (1 << 4) 267 /* Port Link State - bits 5:8 268 * A read gives the current link PM state of the port, 269 * a write with Link State Write Strobe set sets the link state. 270 */ 271 #define PORT_PLS_MASK (0xf << 5) 272 #define XDEV_U0 (0x0 << 5) 273 #define XDEV_U2 (0x2 << 5) 274 #define XDEV_U3 (0x3 << 5) 275 #define XDEV_RESUME (0xf << 5) 276 /* true: port has power (see HCC_PPC) */ 277 #define PORT_POWER (1 << 9) 278 /* bits 10:13 indicate device speed: 279 * 0 - undefined speed - port hasn't be initialized by a reset yet 280 * 1 - full speed 281 * 2 - low speed 282 * 3 - high speed 283 * 4 - super speed 284 * 5-15 reserved 285 */ 286 #define DEV_SPEED_MASK (0xf << 10) 287 #define XDEV_FS (0x1 << 10) 288 #define XDEV_LS (0x2 << 10) 289 #define XDEV_HS (0x3 << 10) 290 #define XDEV_SS (0x4 << 10) 291 #define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10)) 292 #define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS) 293 #define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS) 294 #define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS) 295 #define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS) 296 /* Bits 20:23 in the Slot Context are the speed for the device */ 297 #define SLOT_SPEED_FS (XDEV_FS << 10) 298 #define SLOT_SPEED_LS (XDEV_LS << 10) 299 #define SLOT_SPEED_HS (XDEV_HS << 10) 300 #define SLOT_SPEED_SS (XDEV_SS << 10) 301 /* Port Indicator Control */ 302 #define PORT_LED_OFF (0 << 14) 303 #define PORT_LED_AMBER (1 << 14) 304 #define PORT_LED_GREEN (2 << 14) 305 #define PORT_LED_MASK (3 << 14) 306 /* Port Link State Write Strobe - set this when changing link state */ 307 #define PORT_LINK_STROBE (1 << 16) 308 /* true: connect status change */ 309 #define PORT_CSC (1 << 17) 310 /* true: port enable change */ 311 #define PORT_PEC (1 << 18) 312 /* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port 313 * into an enabled state, and the device into the default state. A "warm" reset 314 * also resets the link, forcing the device through the link training sequence. 315 * SW can also look at the Port Reset register to see when warm reset is done. 316 */ 317 #define PORT_WRC (1 << 19) 318 /* true: over-current change */ 319 #define PORT_OCC (1 << 20) 320 /* true: reset change - 1 to 0 transition of PORT_RESET */ 321 #define PORT_RC (1 << 21) 322 /* port link status change - set on some port link state transitions: 323 * Transition Reason 324 * -------------------------------------------------------------------------- 325 * - U3 to Resume Wakeup signaling from a device 326 * - Resume to Recovery to U0 USB 3.0 device resume 327 * - Resume to U0 USB 2.0 device resume 328 * - U3 to Recovery to U0 Software resume of USB 3.0 device complete 329 * - U3 to U0 Software resume of USB 2.0 device complete 330 * - U2 to U0 L1 resume of USB 2.1 device complete 331 * - U0 to U0 (???) L1 entry rejection by USB 2.1 device 332 * - U0 to disabled L1 entry error with USB 2.1 device 333 * - Any state to inactive Error on USB 3.0 port 334 */ 335 #define PORT_PLC (1 << 22) 336 /* port configure error change - port failed to configure its link partner */ 337 #define PORT_CEC (1 << 23) 338 /* bit 24 reserved */ 339 /* wake on connect (enable) */ 340 #define PORT_WKCONN_E (1 << 25) 341 /* wake on disconnect (enable) */ 342 #define PORT_WKDISC_E (1 << 26) 343 /* wake on over-current (enable) */ 344 #define PORT_WKOC_E (1 << 27) 345 /* bits 28:29 reserved */ 346 /* true: device is removable - for USB 3.0 roothub emulation */ 347 #define PORT_DEV_REMOVE (1 << 30) 348 /* Initiate a warm port reset - complete when PORT_WRC is '1' */ 349 #define PORT_WR (1 << 31) 350 351 /* We mark duplicate entries with -1 */ 352 #define DUPLICATE_ENTRY ((u8)(-1)) 353 354 /* Port Power Management Status and Control - port_power_base bitmasks */ 355 /* Inactivity timer value for transitions into U1, in microseconds. 356 * Timeout can be up to 127us. 0xFF means an infinite timeout. 357 */ 358 #define PORT_U1_TIMEOUT(p) ((p) & 0xff) 359 /* Inactivity timer value for transitions into U2 */ 360 #define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8) 361 /* Bits 24:31 for port testing */ 362 363 /* USB2 Protocol PORTSPMSC */ 364 #define PORT_L1S_MASK 7 365 #define PORT_L1S_SUCCESS 1 366 #define PORT_RWE (1 << 3) 367 #define PORT_HIRD(p) (((p) & 0xf) << 4) 368 #define PORT_HIRD_MASK (0xf << 4) 369 #define PORT_L1DS(p) (((p) & 0xff) << 8) 370 #define PORT_HLE (1 << 16) 371 372 /** 373 * struct xhci_intr_reg - Interrupt Register Set 374 * @irq_pending: IMAN - Interrupt Management Register. Used to enable 375 * interrupts and check for pending interrupts. 376 * @irq_control: IMOD - Interrupt Moderation Register. 377 * Used to throttle interrupts. 378 * @erst_size: Number of segments in the 379 Event Ring Segment Table (ERST). 380 * @erst_base: ERST base address. 381 * @erst_dequeue: Event ring dequeue pointer. 382 * 383 * Each interrupter (defined by a MSI-X vector) has an event ring and an Event 384 * Ring Segment Table (ERST) associated with it. 385 * The event ring is comprised of multiple segments of the same size. 386 * The HC places events on the ring and "updates the Cycle bit in the TRBs to 387 * indicate to software the current position of the Enqueue Pointer." 388 * The HCD (Linux) processes those events and updates the dequeue pointer. 389 */ 390 struct xhci_intr_reg { 391 volatile __le32 irq_pending; 392 volatile __le32 irq_control; 393 volatile __le32 erst_size; 394 volatile __le32 rsvd; 395 volatile __le64 erst_base; 396 volatile __le64 erst_dequeue; 397 }; 398 399 /* irq_pending bitmasks */ 400 #define ER_IRQ_PENDING(p) ((p) & 0x1) 401 /* bits 2:31 need to be preserved */ 402 /* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */ 403 #define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe) 404 #define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2) 405 #define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2)) 406 407 /* irq_control bitmasks */ 408 /* Minimum interval between interrupts (in 250ns intervals). The interval 409 * between interrupts will be longer if there are no events on the event ring. 410 * Default is 4000 (1 ms). 411 */ 412 #define ER_IRQ_INTERVAL_MASK (0xffff) 413 /* Counter used to count down the time to the next interrupt - HW use only */ 414 #define ER_IRQ_COUNTER_MASK (0xffff << 16) 415 416 /* erst_size bitmasks */ 417 /* Preserve bits 16:31 of erst_size */ 418 #define ERST_SIZE_MASK (0xffff << 16) 419 420 /* erst_dequeue bitmasks */ 421 /* Dequeue ERST Segment Index (DESI) - Segment number (or alias) 422 * where the current dequeue pointer lies. This is an optional HW hint. 423 */ 424 #define ERST_DESI_MASK (0x7) 425 /* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by 426 * a work queue (or delayed service routine)? 427 */ 428 #define ERST_EHB (1 << 3) 429 #define ERST_PTR_MASK (0xf) 430 431 /** 432 * struct xhci_run_regs 433 * @microframe_index: MFINDEX - current microframe number 434 * 435 * Section 5.5 Host Controller Runtime Registers: 436 * "Software should read and write these registers using only Dword (32 bit) 437 * or larger accesses" 438 */ 439 struct xhci_run_regs { 440 __le32 microframe_index; 441 __le32 rsvd[7]; 442 struct xhci_intr_reg ir_set[128]; 443 }; 444 445 /** 446 * struct doorbell_array 447 * 448 * Bits 0 - 7: Endpoint target 449 * Bits 8 - 15: RsvdZ 450 * Bits 16 - 31: Stream ID 451 * 452 * Section 5.6 453 */ 454 struct xhci_doorbell_array { 455 volatile __le32 doorbell[256]; 456 }; 457 458 #define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16)) 459 #define DB_VALUE_HOST 0x00000000 460 461 /** 462 * struct xhci_protocol_caps 463 * @revision: major revision, minor revision, capability ID, 464 * and next capability pointer. 465 * @name_string: Four ASCII characters to say which spec this xHC 466 * follows, typically "USB ". 467 * @port_info: Port offset, count, and protocol-defined information. 468 */ 469 struct xhci_protocol_caps { 470 u32 revision; 471 u32 name_string; 472 u32 port_info; 473 }; 474 475 #define XHCI_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff) 476 #define XHCI_EXT_PORT_OFF(x) ((x) & 0xff) 477 #define XHCI_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff) 478 479 /** 480 * struct xhci_container_ctx 481 * @type: Type of context. Used to calculated offsets to contained contexts. 482 * @size: Size of the context data 483 * @bytes: The raw context data given to HW 484 * @dma: dma address of the bytes 485 * 486 * Represents either a Device or Input context. Holds a pointer to the raw 487 * memory used for the context (bytes) and dma address of it (dma). 488 */ 489 struct xhci_container_ctx { 490 unsigned type; 491 #define XHCI_CTX_TYPE_DEVICE 0x1 492 #define XHCI_CTX_TYPE_INPUT 0x2 493 494 int size; 495 u8 *bytes; 496 }; 497 498 /** 499 * struct xhci_slot_ctx 500 * @dev_info: Route string, device speed, hub info, and last valid endpoint 501 * @dev_info2: Max exit latency for device number, root hub port number 502 * @tt_info: tt_info is used to construct split transaction tokens 503 * @dev_state: slot state and device address 504 * 505 * Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context 506 * structures. If the HC uses 64-byte contexts, there is an additional 32 bytes 507 * reserved at the end of the slot context for HC internal use. 508 */ 509 struct xhci_slot_ctx { 510 __le32 dev_info; 511 __le32 dev_info2; 512 __le32 tt_info; 513 __le32 dev_state; 514 /* offset 0x10 to 0x1f reserved for HC internal use */ 515 __le32 reserved[4]; 516 }; 517 518 /* dev_info bitmasks */ 519 /* Route String - 0:19 */ 520 #define ROUTE_STRING_MASK (0xfffff) 521 /* Device speed - values defined by PORTSC Device Speed field - 20:23 */ 522 #define DEV_SPEED (0xf << 20) 523 /* bit 24 reserved */ 524 /* Is this LS/FS device connected through a HS hub? - bit 25 */ 525 #define DEV_MTT (0x1 << 25) 526 /* Set if the device is a hub - bit 26 */ 527 #define DEV_HUB (0x1 << 26) 528 /* Index of the last valid endpoint context in this device context - 27:31 */ 529 #define LAST_CTX_MASK (0x1f << 27) 530 #define LAST_CTX(p) ((p) << 27) 531 #define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1) 532 #define SLOT_FLAG (1 << 0) 533 #define EP0_FLAG (1 << 1) 534 535 /* dev_info2 bitmasks */ 536 /* Max Exit Latency (ms) - worst case time to wake up all links in dev path */ 537 #define MAX_EXIT (0xffff) 538 /* Root hub port number that is needed to access the USB device */ 539 #define ROOT_HUB_PORT(p) (((p) & 0xff) << 16) 540 #define ROOT_HUB_PORT_MASK (0xff) 541 #define ROOT_HUB_PORT_SHIFT (16) 542 #define DEVINFO_TO_ROOT_HUB_PORT(p) (((p) >> 16) & 0xff) 543 /* Maximum number of ports under a hub device */ 544 #define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24) 545 546 /* tt_info bitmasks */ 547 /* 548 * TT Hub Slot ID - for low or full speed devices attached to a high-speed hub 549 * The Slot ID of the hub that isolates the high speed signaling from 550 * this low or full-speed device. '0' if attached to root hub port. 551 */ 552 #define TT_SLOT (0xff) 553 /* 554 * The number of the downstream facing port of the high-speed hub 555 * '0' if the device is not low or full speed. 556 */ 557 #define TT_PORT (0xff << 8) 558 #define TT_THINK_TIME(p) (((p) & 0x3) << 16) 559 560 /* dev_state bitmasks */ 561 /* USB device address - assigned by the HC */ 562 #define DEV_ADDR_MASK (0xff) 563 /* bits 8:26 reserved */ 564 /* Slot state */ 565 #define SLOT_STATE (0x1f << 27) 566 #define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27) 567 568 #define SLOT_STATE_DISABLED 0 569 #define SLOT_STATE_ENABLED SLOT_STATE_DISABLED 570 #define SLOT_STATE_DEFAULT 1 571 #define SLOT_STATE_ADDRESSED 2 572 #define SLOT_STATE_CONFIGURED 3 573 574 /** 575 * struct xhci_ep_ctx 576 * @ep_info: endpoint state, streams, mult, and interval information. 577 * @ep_info2: information on endpoint type, max packet size, max burst size, 578 * error count, and whether the HC will force an event for all 579 * transactions. 580 * @deq: 64-bit ring dequeue pointer address. If the endpoint only 581 * defines one stream, this points to the endpoint transfer ring. 582 * Otherwise, it points to a stream context array, which has a 583 * ring pointer for each flow. 584 * @tx_info: 585 * Average TRB lengths for the endpoint ring and 586 * max payload within an Endpoint Service Interval Time (ESIT). 587 * 588 * Endpoint Context - section 6.2.1.2.This assumes the HC uses 32-byte context 589 * structures.If the HC uses 64-byte contexts, there is an additional 32 bytes 590 * reserved at the end of the endpoint context for HC internal use. 591 */ 592 struct xhci_ep_ctx { 593 __le32 ep_info; 594 __le32 ep_info2; 595 __le64 deq; 596 __le32 tx_info; 597 /* offset 0x14 - 0x1f reserved for HC internal use */ 598 __le32 reserved[3]; 599 }; 600 601 /* ep_info bitmasks */ 602 /* 603 * Endpoint State - bits 0:2 604 * 0 - disabled 605 * 1 - running 606 * 2 - halted due to halt condition - ok to manipulate endpoint ring 607 * 3 - stopped 608 * 4 - TRB error 609 * 5-7 - reserved 610 */ 611 #define EP_STATE_MASK (0xf) 612 #define EP_STATE_DISABLED 0 613 #define EP_STATE_RUNNING 1 614 #define EP_STATE_HALTED 2 615 #define EP_STATE_STOPPED 3 616 #define EP_STATE_ERROR 4 617 /* Mult - Max number of burtst within an interval, in EP companion desc. */ 618 #define EP_MULT(p) (((p) & 0x3) << 8) 619 #define CTX_TO_EP_MULT(p) (((p) >> 8) & 0x3) 620 /* bits 10:14 are Max Primary Streams */ 621 /* bit 15 is Linear Stream Array */ 622 /* Interval - period between requests to an endpoint - 125u increments. */ 623 #define EP_INTERVAL(p) (((p) & 0xff) << 16) 624 #define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff)) 625 #define CTX_TO_EP_INTERVAL(p) (((p) >> 16) & 0xff) 626 #define EP_MAXPSTREAMS_MASK (0x1f << 10) 627 #define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK) 628 /* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */ 629 #define EP_HAS_LSA (1 << 15) 630 631 /* ep_info2 bitmasks */ 632 /* 633 * Force Event - generate transfer events for all TRBs for this endpoint 634 * This will tell the HC to ignore the IOC and ISP flags (for debugging only). 635 */ 636 #define FORCE_EVENT (0x1) 637 #define ERROR_COUNT(p) (((p) & 0x3) << 1) 638 #define ERROR_COUNT_SHIFT (1) 639 #define ERROR_COUNT_MASK (0x3) 640 #define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7) 641 #define EP_TYPE(p) ((p) << 3) 642 #define EP_TYPE_SHIFT (3) 643 #define ISOC_OUT_EP 1 644 #define BULK_OUT_EP 2 645 #define INT_OUT_EP 3 646 #define CTRL_EP 4 647 #define ISOC_IN_EP 5 648 #define BULK_IN_EP 6 649 #define INT_IN_EP 7 650 /* bit 6 reserved */ 651 /* bit 7 is Host Initiate Disable - for disabling stream selection */ 652 #define MAX_BURST(p) (((p)&0xff) << 8) 653 #define MAX_BURST_MASK (0xff) 654 #define MAX_BURST_SHIFT (8) 655 #define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff) 656 #define MAX_PACKET(p) (((p)&0xffff) << 16) 657 #define MAX_PACKET_MASK (0xffff) 658 #define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff) 659 #define MAX_PACKET_SHIFT (16) 660 661 /* Get max packet size from ep desc. Bit 10..0 specify the max packet size. 662 * USB2.0 spec 9.6.6. 663 */ 664 #define GET_MAX_PACKET(p) ((p) & 0x7ff) 665 666 /* tx_info bitmasks */ 667 #define AVG_TRB_LENGTH_FOR_EP(p) ((p) & 0xffff) 668 #define MAX_ESIT_PAYLOAD_FOR_EP(p) (((p) & 0xffff) << 16) 669 #define CTX_TO_MAX_ESIT_PAYLOAD(p) (((p) >> 16) & 0xffff) 670 671 /* deq bitmasks */ 672 #define EP_CTX_CYCLE_MASK (1 << 0) 673 674 675 /** 676 * struct xhci_input_control_context 677 * Input control context; see section 6.2.5. 678 * 679 * @drop_context: set the bit of the endpoint context you want to disable 680 * @add_context: set the bit of the endpoint context you want to enable 681 */ 682 struct xhci_input_control_ctx { 683 volatile __le32 drop_flags; 684 volatile __le32 add_flags; 685 __le32 rsvd2[6]; 686 }; 687 688 689 /** 690 * struct xhci_device_context_array 691 * @dev_context_ptr array of 64-bit DMA addresses for device contexts 692 */ 693 struct xhci_device_context_array { 694 /* 64-bit device addresses; we only write 32-bit addresses */ 695 __le64 dev_context_ptrs[MAX_HC_SLOTS]; 696 }; 697 /* TODO: write function to set the 64-bit device DMA address */ 698 /* 699 * TODO: change this to be dynamically sized at HC mem init time since the HC 700 * might not be able to handle the maximum number of devices possible. 701 */ 702 703 704 struct xhci_transfer_event { 705 /* 64-bit buffer address, or immediate data */ 706 __le64 buffer; 707 __le32 transfer_len; 708 /* This field is interpreted differently based on the type of TRB */ 709 volatile __le32 flags; 710 }; 711 712 /* Transfer event TRB length bit mask */ 713 /* bits 0:23 */ 714 #define EVENT_TRB_LEN(p) ((p) & 0xffffff) 715 716 /** Transfer Event bit fields **/ 717 #define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f) 718 719 /* Completion Code - only applicable for some types of TRBs */ 720 #define COMP_CODE_MASK (0xff << 24) 721 #define COMP_CODE_SHIFT (24) 722 #define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24) 723 724 typedef enum { 725 COMP_SUCCESS = 1, 726 /* Data Buffer Error */ 727 COMP_DB_ERR, /* 2 */ 728 /* Babble Detected Error */ 729 COMP_BABBLE, /* 3 */ 730 /* USB Transaction Error */ 731 COMP_TX_ERR, /* 4 */ 732 /* TRB Error - some TRB field is invalid */ 733 COMP_TRB_ERR, /* 5 */ 734 /* Stall Error - USB device is stalled */ 735 COMP_STALL, /* 6 */ 736 /* Resource Error - HC doesn't have memory for that device configuration */ 737 COMP_ENOMEM, /* 7 */ 738 /* Bandwidth Error - not enough room in schedule for this dev config */ 739 COMP_BW_ERR, /* 8 */ 740 /* No Slots Available Error - HC ran out of device slots */ 741 COMP_ENOSLOTS, /* 9 */ 742 /* Invalid Stream Type Error */ 743 COMP_STREAM_ERR, /* 10 */ 744 /* Slot Not Enabled Error - doorbell rung for disabled device slot */ 745 COMP_EBADSLT, /* 11 */ 746 /* Endpoint Not Enabled Error */ 747 COMP_EBADEP,/* 12 */ 748 /* Short Packet */ 749 COMP_SHORT_TX, /* 13 */ 750 /* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */ 751 COMP_UNDERRUN, /* 14 */ 752 /* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */ 753 COMP_OVERRUN, /* 15 */ 754 /* Virtual Function Event Ring Full Error */ 755 COMP_VF_FULL, /* 16 */ 756 /* Parameter Error - Context parameter is invalid */ 757 COMP_EINVAL, /* 17 */ 758 /* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */ 759 COMP_BW_OVER,/* 18 */ 760 /* Context State Error - illegal context state transition requested */ 761 COMP_CTX_STATE,/* 19 */ 762 /* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */ 763 COMP_PING_ERR,/* 20 */ 764 /* Event Ring is full */ 765 COMP_ER_FULL,/* 21 */ 766 /* Incompatible Device Error */ 767 COMP_DEV_ERR,/* 22 */ 768 /* Missed Service Error - HC couldn't service an isoc ep within interval */ 769 COMP_MISSED_INT,/* 23 */ 770 /* Successfully stopped command ring */ 771 COMP_CMD_STOP, /* 24 */ 772 /* Successfully aborted current command and stopped command ring */ 773 COMP_CMD_ABORT, /* 25 */ 774 /* Stopped - transfer was terminated by a stop endpoint command */ 775 COMP_STOP,/* 26 */ 776 /* Same as COMP_EP_STOPPED, but the transferred length in the event 777 * is invalid */ 778 COMP_STOP_INVAL, /* 27*/ 779 /* Control Abort Error - Debug Capability - control pipe aborted */ 780 COMP_DBG_ABORT, /* 28 */ 781 /* Max Exit Latency Too Large Error */ 782 COMP_MEL_ERR,/* 29 */ 783 /* TRB type 30 reserved */ 784 /* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */ 785 COMP_BUFF_OVER = 31, 786 /* Event Lost Error - xHC has an "internal event overrun condition" */ 787 COMP_ISSUES, /* 32 */ 788 /* Undefined Error - reported when other error codes don't apply */ 789 COMP_UNKNOWN, /* 33 */ 790 /* Invalid Stream ID Error */ 791 COMP_STRID_ERR, /* 34 */ 792 /* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */ 793 COMP_2ND_BW_ERR, /* 35 */ 794 /* Split Transaction Error */ 795 COMP_SPLIT_ERR /* 36 */ 796 797 } xhci_comp_code; 798 799 struct xhci_link_trb { 800 /* 64-bit segment pointer*/ 801 volatile __le64 segment_ptr; 802 volatile __le32 intr_target; 803 volatile __le32 control; 804 }; 805 806 /* control bitfields */ 807 #define LINK_TOGGLE (0x1 << 1) 808 809 /* Command completion event TRB */ 810 struct xhci_event_cmd { 811 /* Pointer to command TRB, or the value passed by the event data trb */ 812 volatile __le64 cmd_trb; 813 volatile __le32 status; 814 volatile __le32 flags; 815 }; 816 817 /* flags bitmasks */ 818 /* bits 16:23 are the virtual function ID */ 819 /* bits 24:31 are the slot ID */ 820 #define TRB_TO_SLOT_ID(p) (((p) & (0xff << 24)) >> 24) 821 #define TRB_TO_SLOT_ID_SHIFT (24) 822 #define TRB_TO_SLOT_ID_MASK (0xff << TRB_TO_SLOT_ID_SHIFT) 823 #define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24) 824 #define SLOT_ID_FOR_TRB_MASK (0xff) 825 #define SLOT_ID_FOR_TRB_SHIFT (24) 826 827 /* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */ 828 #define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1) 829 #define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16) 830 831 #define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23) 832 #define TRB_TO_SUSPEND_PORT(p) (((p) & (1 << 23)) >> 23) 833 #define LAST_EP_INDEX 30 834 835 /* Set TR Dequeue Pointer command TRB fields */ 836 #define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16)) 837 #define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16) 838 839 840 /* Port Status Change Event TRB fields */ 841 /* Port ID - bits 31:24 */ 842 #define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24) 843 #define PORT_ID_SHIFT (24) 844 #define PORT_ID_MASK (0xff << PORT_ID_SHIFT) 845 846 /* Normal TRB fields */ 847 /* transfer_len bitmasks - bits 0:16 */ 848 #define TRB_LEN(p) ((p) & 0x1ffff) 849 #define TRB_LEN_MASK (0x1ffff) 850 /* Interrupter Target - which MSI-X vector to target the completion event at */ 851 #define TRB_INTR_TARGET_SHIFT (22) 852 #define TRB_INTR_TARGET_MASK (0x3ff) 853 #define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22) 854 #define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff) 855 #define TRB_TBC(p) (((p) & 0x3) << 7) 856 #define TRB_TLBPC(p) (((p) & 0xf) << 16) 857 858 /* Cycle bit - indicates TRB ownership by HC or HCD */ 859 #define TRB_CYCLE (1<<0) 860 /* 861 * Force next event data TRB to be evaluated before task switch. 862 * Used to pass OS data back after a TD completes. 863 */ 864 #define TRB_ENT (1<<1) 865 /* Interrupt on short packet */ 866 #define TRB_ISP (1<<2) 867 /* Set PCIe no snoop attribute */ 868 #define TRB_NO_SNOOP (1<<3) 869 /* Chain multiple TRBs into a TD */ 870 #define TRB_CHAIN (1<<4) 871 /* Interrupt on completion */ 872 #define TRB_IOC (1<<5) 873 /* The buffer pointer contains immediate data */ 874 #define TRB_IDT (1<<6) 875 876 /* Block Event Interrupt */ 877 #define TRB_BEI (1<<9) 878 879 /* Control transfer TRB specific fields */ 880 #define TRB_DIR_IN (1<<16) 881 #define TRB_TX_TYPE(p) ((p) << 16) 882 #define TRB_TX_TYPE_SHIFT (16) 883 #define TRB_DATA_OUT 2 884 #define TRB_DATA_IN 3 885 886 /* Isochronous TRB specific fields */ 887 #define TRB_SIA (1 << 31) 888 889 struct xhci_generic_trb { 890 volatile __le32 field[4]; 891 }; 892 893 union xhci_trb { 894 struct xhci_link_trb link; 895 struct xhci_transfer_event trans_event; 896 struct xhci_event_cmd event_cmd; 897 struct xhci_generic_trb generic; 898 }; 899 900 /* TRB bit mask */ 901 #define TRB_TYPE_BITMASK (0xfc00) 902 #define TRB_TYPE(p) ((p) << 10) 903 #define TRB_TYPE_SHIFT (10) 904 #define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10) 905 906 /* TRB type IDs */ 907 typedef enum { 908 /* bulk, interrupt, isoc scatter/gather, and control data stage */ 909 TRB_NORMAL = 1, 910 /* setup stage for control transfers */ 911 TRB_SETUP, /* 2 */ 912 /* data stage for control transfers */ 913 TRB_DATA, /* 3 */ 914 /* status stage for control transfers */ 915 TRB_STATUS, /* 4 */ 916 /* isoc transfers */ 917 TRB_ISOC, /* 5 */ 918 /* TRB for linking ring segments */ 919 TRB_LINK, /* 6 */ 920 /* TRB for EVENT DATA */ 921 TRB_EVENT_DATA, /* 7 */ 922 /* Transfer Ring No-op (not for the command ring) */ 923 TRB_TR_NOOP, /* 8 */ 924 /* Command TRBs */ 925 /* Enable Slot Command */ 926 TRB_ENABLE_SLOT, /* 9 */ 927 /* Disable Slot Command */ 928 TRB_DISABLE_SLOT, /* 10 */ 929 /* Address Device Command */ 930 TRB_ADDR_DEV, /* 11 */ 931 /* Configure Endpoint Command */ 932 TRB_CONFIG_EP, /* 12 */ 933 /* Evaluate Context Command */ 934 TRB_EVAL_CONTEXT, /* 13 */ 935 /* Reset Endpoint Command */ 936 TRB_RESET_EP, /* 14 */ 937 /* Stop Transfer Ring Command */ 938 TRB_STOP_RING, /* 15 */ 939 /* Set Transfer Ring Dequeue Pointer Command */ 940 TRB_SET_DEQ, /* 16 */ 941 /* Reset Device Command */ 942 TRB_RESET_DEV, /* 17 */ 943 /* Force Event Command (opt) */ 944 TRB_FORCE_EVENT, /* 18 */ 945 /* Negotiate Bandwidth Command (opt) */ 946 TRB_NEG_BANDWIDTH, /* 19 */ 947 /* Set Latency Tolerance Value Command (opt) */ 948 TRB_SET_LT, /* 20 */ 949 /* Get port bandwidth Command */ 950 TRB_GET_BW, /* 21 */ 951 /* Force Header Command - generate a transaction or link management packet */ 952 TRB_FORCE_HEADER, /* 22 */ 953 /* No-op Command - not for transfer rings */ 954 TRB_CMD_NOOP, /* 23 */ 955 /* TRB IDs 24-31 reserved */ 956 /* Event TRBS */ 957 /* Transfer Event */ 958 TRB_TRANSFER = 32, 959 /* Command Completion Event */ 960 TRB_COMPLETION, /* 33 */ 961 /* Port Status Change Event */ 962 TRB_PORT_STATUS, /* 34 */ 963 /* Bandwidth Request Event (opt) */ 964 TRB_BANDWIDTH_EVENT, /* 35 */ 965 /* Doorbell Event (opt) */ 966 TRB_DOORBELL, /* 36 */ 967 /* Host Controller Event */ 968 TRB_HC_EVENT, /* 37 */ 969 /* Device Notification Event - device sent function wake notification */ 970 TRB_DEV_NOTE, /* 38 */ 971 /* MFINDEX Wrap Event - microframe counter wrapped */ 972 TRB_MFINDEX_WRAP, /* 39 */ 973 /* TRB IDs 40-47 reserved, 48-63 is vendor-defined */ 974 /* Nec vendor-specific command completion event. */ 975 TRB_NEC_CMD_COMP = 48, /* 48 */ 976 /* Get NEC firmware revision. */ 977 TRB_NEC_GET_FW, /* 49 */ 978 } trb_type; 979 980 #define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK)) 981 /* Above, but for __le32 types -- can avoid work by swapping constants: */ 982 #define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \ 983 cpu_to_le32(TRB_TYPE(TRB_LINK))) 984 #define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \ 985 cpu_to_le32(TRB_TYPE(TRB_TR_NOOP))) 986 987 /* 988 * TRBS_PER_SEGMENT must be a multiple of 4, 989 * since the command ring is 64-byte aligned. 990 * It must also be greater than 16. 991 */ 992 #define TRBS_PER_SEGMENT 64 993 /* Allow two commands + a link TRB, along with any reserved command TRBs */ 994 #define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3) 995 #define SEGMENT_SIZE (TRBS_PER_SEGMENT*16) 996 /* SEGMENT_SHIFT should be log2(SEGMENT_SIZE). 997 * Change this if you change TRBS_PER_SEGMENT! 998 */ 999 #define SEGMENT_SHIFT 10 1000 /* TRB buffer pointers can't cross 64KB boundaries */ 1001 #define TRB_MAX_BUFF_SHIFT 16 1002 #define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT) 1003 1004 struct xhci_segment { 1005 union xhci_trb *trbs; 1006 /* private to HCD */ 1007 struct xhci_segment *next; 1008 }; 1009 1010 struct xhci_ring { 1011 struct xhci_segment *first_seg; 1012 union xhci_trb *enqueue; 1013 struct xhci_segment *enq_seg; 1014 union xhci_trb *dequeue; 1015 struct xhci_segment *deq_seg; 1016 /* 1017 * Write the cycle state into the TRB cycle field to give ownership of 1018 * the TRB to the host controller (if we are the producer), or to check 1019 * if we own the TRB (if we are the consumer). See section 4.9.1. 1020 */ 1021 volatile u32 cycle_state; 1022 unsigned int num_segs; 1023 }; 1024 1025 struct xhci_erst_entry { 1026 /* 64-bit event ring segment address */ 1027 __le64 seg_addr; 1028 __le32 seg_size; 1029 /* Set to zero */ 1030 __le32 rsvd; 1031 }; 1032 1033 struct xhci_erst { 1034 struct xhci_erst_entry *entries; 1035 unsigned int num_entries; 1036 /* Num entries the ERST can contain */ 1037 unsigned int erst_size; 1038 }; 1039 1040 /* 1041 * Each segment table entry is 4*32bits long. 1K seems like an ok size: 1042 * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table, 1043 * meaning 64 ring segments. 1044 * Initial allocated size of the ERST, in number of entries */ 1045 #define ERST_NUM_SEGS 3 1046 /* Initial number of event segment rings allocated */ 1047 #define ERST_ENTRIES 3 1048 /* Initial allocated size of the ERST, in number of entries */ 1049 #define ERST_SIZE 64 1050 /* Poll every 60 seconds */ 1051 #define POLL_TIMEOUT 60 1052 /* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */ 1053 #define XHCI_STOP_EP_CMD_TIMEOUT 5 1054 /* XXX: Make these module parameters */ 1055 1056 struct xhci_virt_ep { 1057 struct xhci_ring *ring; 1058 unsigned int ep_state; 1059 #define SET_DEQ_PENDING (1 << 0) 1060 #define EP_HALTED (1 << 1) /* For stall handling */ 1061 #define EP_HALT_PENDING (1 << 2) /* For URB cancellation */ 1062 /* Transitioning the endpoint to using streams, don't enqueue URBs */ 1063 #define EP_GETTING_STREAMS (1 << 3) 1064 #define EP_HAS_STREAMS (1 << 4) 1065 /* Transitioning the endpoint to not using streams, don't enqueue URBs */ 1066 #define EP_GETTING_NO_STREAMS (1 << 5) 1067 }; 1068 1069 #define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32) 1070 1071 struct xhci_virt_device { 1072 struct usb_device *udev; 1073 /* 1074 * Commands to the hardware are passed an "input context" that 1075 * tells the hardware what to change in its data structures. 1076 * The hardware will return changes in an "output context" that 1077 * software must allocate for the hardware. We need to keep 1078 * track of input and output contexts separately because 1079 * these commands might fail and we don't trust the hardware. 1080 */ 1081 struct xhci_container_ctx *out_ctx; 1082 /* Used for addressing devices and configuration changes */ 1083 struct xhci_container_ctx *in_ctx; 1084 /* Rings saved to ensure old alt settings can be re-instated */ 1085 #define XHCI_MAX_RINGS_CACHED 31 1086 struct xhci_virt_ep eps[31]; 1087 }; 1088 1089 /* TODO: copied from ehci.h - can be refactored? */ 1090 /* xHCI spec says all registers are little endian */ 1091 static inline unsigned int xhci_readl(uint32_t volatile *regs) 1092 { 1093 return readl(regs); 1094 } 1095 1096 static inline void xhci_writel(uint32_t volatile *regs, const unsigned int val) 1097 { 1098 writel(val, regs); 1099 } 1100 1101 /* 1102 * Registers should always be accessed with double word or quad word accesses. 1103 * Some xHCI implementations may support 64-bit address pointers. Registers 1104 * with 64-bit address pointers should be written to with dword accesses by 1105 * writing the low dword first (ptr[0]), then the high dword (ptr[1]) second. 1106 * xHCI implementations that do not support 64-bit address pointers will ignore 1107 * the high dword, and write order is irrelevant. 1108 */ 1109 static inline u64 xhci_readq(__le64 volatile *regs) 1110 { 1111 __u32 *ptr = (__u32 *)regs; 1112 u64 val_lo = readl(ptr); 1113 u64 val_hi = readl(ptr + 1); 1114 return val_lo + (val_hi << 32); 1115 } 1116 1117 static inline void xhci_writeq(__le64 volatile *regs, const u64 val) 1118 { 1119 __u32 *ptr = (__u32 *)regs; 1120 u32 val_lo = lower_32_bits(val); 1121 /* FIXME */ 1122 u32 val_hi = upper_32_bits(val); 1123 writel(val_lo, ptr); 1124 writel(val_hi, ptr + 1); 1125 } 1126 1127 int xhci_hcd_init(int index, struct xhci_hccr **ret_hccr, 1128 struct xhci_hcor **ret_hcor); 1129 void xhci_hcd_stop(int index); 1130 1131 1132 /************************************************************* 1133 EXTENDED CAPABILITY DEFINITIONS 1134 *************************************************************/ 1135 /* Up to 16 ms to halt an HC */ 1136 #define XHCI_MAX_HALT_USEC (16*1000) 1137 /* HC not running - set to 1 when run/stop bit is cleared. */ 1138 #define XHCI_STS_HALT (1 << 0) 1139 1140 /* HCCPARAMS offset from PCI base address */ 1141 #define XHCI_HCC_PARAMS_OFFSET 0x10 1142 /* HCCPARAMS contains the first extended capability pointer */ 1143 #define XHCI_HCC_EXT_CAPS(p) (((p)>>16)&0xffff) 1144 1145 /* Command and Status registers offset from the Operational Registers address */ 1146 #define XHCI_CMD_OFFSET 0x00 1147 #define XHCI_STS_OFFSET 0x04 1148 1149 #define XHCI_MAX_EXT_CAPS 50 1150 1151 /* Capability Register */ 1152 /* bits 7:0 - how long is the Capabilities register */ 1153 #define XHCI_HC_LENGTH(p) (((p) >> 00) & 0x00ff) 1154 1155 /* Extended capability register fields */ 1156 #define XHCI_EXT_CAPS_ID(p) (((p) >> 0) & 0xff) 1157 #define XHCI_EXT_CAPS_NEXT(p) (((p) >> 8) & 0xff) 1158 #define XHCI_EXT_CAPS_VAL(p) ((p) >> 16) 1159 /* Extended capability IDs - ID 0 reserved */ 1160 #define XHCI_EXT_CAPS_LEGACY 1 1161 #define XHCI_EXT_CAPS_PROTOCOL 2 1162 #define XHCI_EXT_CAPS_PM 3 1163 #define XHCI_EXT_CAPS_VIRT 4 1164 #define XHCI_EXT_CAPS_ROUTE 5 1165 /* IDs 6-9 reserved */ 1166 #define XHCI_EXT_CAPS_DEBUG 10 1167 /* USB Legacy Support Capability - section 7.1.1 */ 1168 #define XHCI_HC_BIOS_OWNED (1 << 16) 1169 #define XHCI_HC_OS_OWNED (1 << 24) 1170 1171 /* USB Legacy Support Capability - section 7.1.1 */ 1172 /* Add this offset, plus the value of xECP in HCCPARAMS to the base address */ 1173 #define XHCI_LEGACY_SUPPORT_OFFSET (0x00) 1174 1175 /* USB Legacy Support Control and Status Register - section 7.1.2 */ 1176 /* Add this offset, plus the value of xECP in HCCPARAMS to the base address */ 1177 #define XHCI_LEGACY_CONTROL_OFFSET (0x04) 1178 /* bits 1:2, 5:12, and 17:19 need to be preserved; bits 21:28 should be zero */ 1179 #define XHCI_LEGACY_DISABLE_SMI ((0x3 << 1) + (0xff << 5) + (0x7 << 17)) 1180 1181 /* USB 2.0 xHCI 0.96 L1C capability - section 7.2.2.1.3.2 */ 1182 #define XHCI_L1C (1 << 16) 1183 1184 /* USB 2.0 xHCI 1.0 hardware LMP capability - section 7.2.2.1.3.2 */ 1185 #define XHCI_HLC (1 << 19) 1186 1187 /* command register values to disable interrupts and halt the HC */ 1188 /* start/stop HC execution - do not write unless HC is halted*/ 1189 #define XHCI_CMD_RUN (1 << 0) 1190 /* Event Interrupt Enable - get irq when EINT bit is set in USBSTS register */ 1191 #define XHCI_CMD_EIE (1 << 2) 1192 /* Host System Error Interrupt Enable - get irq when HSEIE bit set in USBSTS */ 1193 #define XHCI_CMD_HSEIE (1 << 3) 1194 /* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */ 1195 #define XHCI_CMD_EWE (1 << 10) 1196 1197 #define XHCI_IRQS (XHCI_CMD_EIE | XHCI_CMD_HSEIE | XHCI_CMD_EWE) 1198 1199 /* true: Controller Not Ready to accept doorbell or op reg writes after reset */ 1200 #define XHCI_STS_CNR (1 << 11) 1201 1202 struct xhci_ctrl { 1203 struct xhci_hccr *hccr; /* R/O registers, not need for volatile */ 1204 struct xhci_hcor *hcor; 1205 struct xhci_doorbell_array *dba; 1206 struct xhci_run_regs *run_regs; 1207 struct xhci_device_context_array *dcbaa \ 1208 __attribute__ ((aligned(ARCH_DMA_MINALIGN))); 1209 struct xhci_ring *event_ring; 1210 struct xhci_ring *cmd_ring; 1211 struct xhci_ring *transfer_ring; 1212 struct xhci_segment *seg; 1213 struct xhci_intr_reg *ir_set; 1214 struct xhci_erst erst; 1215 struct xhci_erst_entry entry[ERST_NUM_SEGS]; 1216 struct xhci_virt_device *devs[MAX_HC_SLOTS]; 1217 int rootdev; 1218 }; 1219 1220 unsigned long trb_addr(struct xhci_segment *seg, union xhci_trb *trb); 1221 struct xhci_input_control_ctx 1222 *xhci_get_input_control_ctx(struct xhci_container_ctx *ctx); 1223 struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_ctrl *ctrl, 1224 struct xhci_container_ctx *ctx); 1225 struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_ctrl *ctrl, 1226 struct xhci_container_ctx *ctx, 1227 unsigned int ep_index); 1228 void xhci_endpoint_copy(struct xhci_ctrl *ctrl, 1229 struct xhci_container_ctx *in_ctx, 1230 struct xhci_container_ctx *out_ctx, 1231 unsigned int ep_index); 1232 void xhci_slot_copy(struct xhci_ctrl *ctrl, 1233 struct xhci_container_ctx *in_ctx, 1234 struct xhci_container_ctx *out_ctx); 1235 void xhci_setup_addressable_virt_dev(struct usb_device *udev); 1236 void xhci_queue_command(struct xhci_ctrl *ctrl, u8 *ptr, 1237 u32 slot_id, u32 ep_index, trb_type cmd); 1238 void xhci_acknowledge_event(struct xhci_ctrl *ctrl); 1239 union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected); 1240 int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe, 1241 int length, void *buffer); 1242 int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe, 1243 struct devrequest *req, int length, void *buffer); 1244 int xhci_check_maxpacket(struct usb_device *udev); 1245 void xhci_flush_cache(uint32_t addr, u32 type_len); 1246 void xhci_inval_cache(uint32_t addr, u32 type_len); 1247 void xhci_cleanup(struct xhci_ctrl *ctrl); 1248 struct xhci_ring *xhci_ring_alloc(unsigned int num_segs, bool link_trbs); 1249 int xhci_alloc_virt_device(struct usb_device *udev); 1250 int xhci_mem_init(struct xhci_ctrl *ctrl, struct xhci_hccr *hccr, 1251 struct xhci_hcor *hcor); 1252 1253 #endif /* HOST_XHCI_H_ */ 1254