1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * xHCI host controller driver 4 * 5 * Copyright (C) 2008 Intel Corp. 6 * 7 * Author: Sarah Sharp 8 * Some code borrowed from the Linux EHCI driver. 9 */ 10 11 12 #include <linux/slab.h> 13 #include <asm/unaligned.h> 14 #include <linux/bitfield.h> 15 16 #include "xhci.h" 17 #include "xhci-trace.h" 18 19 #define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E) 20 #define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \ 21 PORT_RC | PORT_PLC | PORT_PE) 22 23 /* Default sublink speed attribute of each lane */ 24 static u32 ssp_cap_default_ssa[] = { 25 0x00050034, /* USB 3.0 SS Gen1x1 id:4 symmetric rx 5Gbps */ 26 0x000500b4, /* USB 3.0 SS Gen1x1 id:4 symmetric tx 5Gbps */ 27 0x000a4035, /* USB 3.1 SSP Gen2x1 id:5 symmetric rx 10Gbps */ 28 0x000a40b5, /* USB 3.1 SSP Gen2x1 id:5 symmetric tx 10Gbps */ 29 0x00054036, /* USB 3.2 SSP Gen1x2 id:6 symmetric rx 5Gbps */ 30 0x000540b6, /* USB 3.2 SSP Gen1x2 id:6 symmetric tx 5Gbps */ 31 0x000a4037, /* USB 3.2 SSP Gen2x2 id:7 symmetric rx 10Gbps */ 32 0x000a40b7, /* USB 3.2 SSP Gen2x2 id:7 symmetric tx 10Gbps */ 33 }; 34 35 static int xhci_create_usb3x_bos_desc(struct xhci_hcd *xhci, char *buf, 36 u16 wLength) 37 { 38 struct usb_bos_descriptor *bos; 39 struct usb_ss_cap_descriptor *ss_cap; 40 struct usb_ssp_cap_descriptor *ssp_cap; 41 struct xhci_port_cap *port_cap = NULL; 42 u16 bcdUSB; 43 u32 reg; 44 u32 min_rate = 0; 45 u8 min_ssid; 46 u8 ssac; 47 u8 ssic; 48 int offset; 49 int i; 50 51 /* BOS descriptor */ 52 bos = (struct usb_bos_descriptor *)buf; 53 bos->bLength = USB_DT_BOS_SIZE; 54 bos->bDescriptorType = USB_DT_BOS; 55 bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE + 56 USB_DT_USB_SS_CAP_SIZE); 57 bos->bNumDeviceCaps = 1; 58 59 /* Create the descriptor for port with the highest revision */ 60 for (i = 0; i < xhci->num_port_caps; i++) { 61 u8 major = xhci->port_caps[i].maj_rev; 62 u8 minor = xhci->port_caps[i].min_rev; 63 u16 rev = (major << 8) | minor; 64 65 if (i == 0 || bcdUSB < rev) { 66 bcdUSB = rev; 67 port_cap = &xhci->port_caps[i]; 68 } 69 } 70 71 if (bcdUSB >= 0x0310) { 72 if (port_cap->psi_count) { 73 u8 num_sym_ssa = 0; 74 75 for (i = 0; i < port_cap->psi_count; i++) { 76 if ((port_cap->psi[i] & PLT_MASK) == PLT_SYM) 77 num_sym_ssa++; 78 } 79 80 ssac = port_cap->psi_count + num_sym_ssa - 1; 81 ssic = port_cap->psi_uid_count - 1; 82 } else { 83 if (bcdUSB >= 0x0320) 84 ssac = 7; 85 else 86 ssac = 3; 87 88 ssic = (ssac + 1) / 2 - 1; 89 } 90 91 bos->bNumDeviceCaps++; 92 bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE + 93 USB_DT_USB_SS_CAP_SIZE + 94 USB_DT_USB_SSP_CAP_SIZE(ssac)); 95 } 96 97 if (wLength < USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE) 98 return wLength; 99 100 /* SuperSpeed USB Device Capability */ 101 ss_cap = (struct usb_ss_cap_descriptor *)&buf[USB_DT_BOS_SIZE]; 102 ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; 103 ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; 104 ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; 105 ss_cap->bmAttributes = 0; /* set later */ 106 ss_cap->wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION); 107 ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; 108 ss_cap->bU1devExitLat = 0; /* set later */ 109 ss_cap->bU2DevExitLat = 0; /* set later */ 110 111 reg = readl(&xhci->cap_regs->hcc_params); 112 if (HCC_LTC(reg)) 113 ss_cap->bmAttributes |= USB_LTM_SUPPORT; 114 115 if ((xhci->quirks & XHCI_LPM_SUPPORT)) { 116 reg = readl(&xhci->cap_regs->hcs_params3); 117 ss_cap->bU1devExitLat = HCS_U1_LATENCY(reg); 118 ss_cap->bU2DevExitLat = cpu_to_le16(HCS_U2_LATENCY(reg)); 119 } 120 121 if (wLength < le16_to_cpu(bos->wTotalLength)) 122 return wLength; 123 124 if (bcdUSB < 0x0310) 125 return le16_to_cpu(bos->wTotalLength); 126 127 ssp_cap = (struct usb_ssp_cap_descriptor *)&buf[USB_DT_BOS_SIZE + 128 USB_DT_USB_SS_CAP_SIZE]; 129 ssp_cap->bLength = USB_DT_USB_SSP_CAP_SIZE(ssac); 130 ssp_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; 131 ssp_cap->bDevCapabilityType = USB_SSP_CAP_TYPE; 132 ssp_cap->bReserved = 0; 133 ssp_cap->wReserved = 0; 134 ssp_cap->bmAttributes = 135 cpu_to_le32(FIELD_PREP(USB_SSP_SUBLINK_SPEED_ATTRIBS, ssac) | 136 FIELD_PREP(USB_SSP_SUBLINK_SPEED_IDS, ssic)); 137 138 if (!port_cap->psi_count) { 139 for (i = 0; i < ssac + 1; i++) 140 ssp_cap->bmSublinkSpeedAttr[i] = 141 cpu_to_le32(ssp_cap_default_ssa[i]); 142 143 min_ssid = 4; 144 goto out; 145 } 146 147 offset = 0; 148 for (i = 0; i < port_cap->psi_count; i++) { 149 u32 psi; 150 u32 attr; 151 u8 ssid; 152 u8 lp; 153 u8 lse; 154 u8 psie; 155 u16 lane_mantissa; 156 u16 psim; 157 u16 plt; 158 159 psi = port_cap->psi[i]; 160 ssid = XHCI_EXT_PORT_PSIV(psi); 161 lp = XHCI_EXT_PORT_LP(psi); 162 psie = XHCI_EXT_PORT_PSIE(psi); 163 psim = XHCI_EXT_PORT_PSIM(psi); 164 plt = psi & PLT_MASK; 165 166 lse = psie; 167 lane_mantissa = psim; 168 169 /* Shift to Gbps and set SSP Link Protocol if 10Gpbs */ 170 for (; psie < USB_SSP_SUBLINK_SPEED_LSE_GBPS; psie++) 171 psim /= 1000; 172 173 if (!min_rate || psim < min_rate) { 174 min_ssid = ssid; 175 min_rate = psim; 176 } 177 178 /* Some host controllers don't set the link protocol for SSP */ 179 if (psim >= 10) 180 lp = USB_SSP_SUBLINK_SPEED_LP_SSP; 181 182 /* 183 * PSIM and PSIE represent the total speed of PSI. The BOS 184 * descriptor SSP sublink speed attribute lane mantissa 185 * describes the lane speed. E.g. PSIM and PSIE for gen2x2 186 * is 20Gbps, but the BOS descriptor lane speed mantissa is 187 * 10Gbps. Check and modify the mantissa value to match the 188 * lane speed. 189 */ 190 if (bcdUSB == 0x0320 && plt == PLT_SYM) { 191 /* 192 * The PSI dword for gen1x2 and gen2x1 share the same 193 * values. But the lane speed for gen1x2 is 5Gbps while 194 * gen2x1 is 10Gbps. If the previous PSI dword SSID is 195 * 5 and the PSIE and PSIM match with SSID 6, let's 196 * assume that the controller follows the default speed 197 * id with SSID 6 for gen1x2. 198 */ 199 if (ssid == 6 && psie == 3 && psim == 10 && i) { 200 u32 prev = port_cap->psi[i - 1]; 201 202 if ((prev & PLT_MASK) == PLT_SYM && 203 XHCI_EXT_PORT_PSIV(prev) == 5 && 204 XHCI_EXT_PORT_PSIE(prev) == 3 && 205 XHCI_EXT_PORT_PSIM(prev) == 10) { 206 lse = USB_SSP_SUBLINK_SPEED_LSE_GBPS; 207 lane_mantissa = 5; 208 } 209 } 210 211 if (psie == 3 && psim > 10) { 212 lse = USB_SSP_SUBLINK_SPEED_LSE_GBPS; 213 lane_mantissa = 10; 214 } 215 } 216 217 attr = (FIELD_PREP(USB_SSP_SUBLINK_SPEED_SSID, ssid) | 218 FIELD_PREP(USB_SSP_SUBLINK_SPEED_LP, lp) | 219 FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSE, lse) | 220 FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSM, lane_mantissa)); 221 222 switch (plt) { 223 case PLT_SYM: 224 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST, 225 USB_SSP_SUBLINK_SPEED_ST_SYM_RX); 226 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr); 227 228 attr &= ~USB_SSP_SUBLINK_SPEED_ST; 229 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST, 230 USB_SSP_SUBLINK_SPEED_ST_SYM_TX); 231 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr); 232 break; 233 case PLT_ASYM_RX: 234 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST, 235 USB_SSP_SUBLINK_SPEED_ST_ASYM_RX); 236 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr); 237 break; 238 case PLT_ASYM_TX: 239 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST, 240 USB_SSP_SUBLINK_SPEED_ST_ASYM_TX); 241 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr); 242 break; 243 } 244 } 245 out: 246 ssp_cap->wFunctionalitySupport = 247 cpu_to_le16(FIELD_PREP(USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID, 248 min_ssid) | 249 FIELD_PREP(USB_SSP_MIN_RX_LANE_COUNT, 1) | 250 FIELD_PREP(USB_SSP_MIN_TX_LANE_COUNT, 1)); 251 252 return le16_to_cpu(bos->wTotalLength); 253 } 254 255 static void xhci_common_hub_descriptor(struct xhci_hcd *xhci, 256 struct usb_hub_descriptor *desc, int ports) 257 { 258 u16 temp; 259 260 desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */ 261 desc->bHubContrCurrent = 0; 262 263 desc->bNbrPorts = ports; 264 temp = 0; 265 /* Bits 1:0 - support per-port power switching, or power always on */ 266 if (HCC_PPC(xhci->hcc_params)) 267 temp |= HUB_CHAR_INDV_PORT_LPSM; 268 else 269 temp |= HUB_CHAR_NO_LPSM; 270 /* Bit 2 - root hubs are not part of a compound device */ 271 /* Bits 4:3 - individual port over current protection */ 272 temp |= HUB_CHAR_INDV_PORT_OCPM; 273 /* Bits 6:5 - no TTs in root ports */ 274 /* Bit 7 - no port indicators */ 275 desc->wHubCharacteristics = cpu_to_le16(temp); 276 } 277 278 /* Fill in the USB 2.0 roothub descriptor */ 279 static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, 280 struct usb_hub_descriptor *desc) 281 { 282 int ports; 283 u16 temp; 284 __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8]; 285 u32 portsc; 286 unsigned int i; 287 struct xhci_hub *rhub; 288 289 rhub = &xhci->usb2_rhub; 290 ports = rhub->num_ports; 291 xhci_common_hub_descriptor(xhci, desc, ports); 292 desc->bDescriptorType = USB_DT_HUB; 293 temp = 1 + (ports / 8); 294 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp; 295 296 /* The Device Removable bits are reported on a byte granularity. 297 * If the port doesn't exist within that byte, the bit is set to 0. 298 */ 299 memset(port_removable, 0, sizeof(port_removable)); 300 for (i = 0; i < ports; i++) { 301 portsc = readl(rhub->ports[i]->addr); 302 /* If a device is removable, PORTSC reports a 0, same as in the 303 * hub descriptor DeviceRemovable bits. 304 */ 305 if (portsc & PORT_DEV_REMOVE) 306 /* This math is hairy because bit 0 of DeviceRemovable 307 * is reserved, and bit 1 is for port 1, etc. 308 */ 309 port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8); 310 } 311 312 /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN 313 * ports on it. The USB 2.0 specification says that there are two 314 * variable length fields at the end of the hub descriptor: 315 * DeviceRemovable and PortPwrCtrlMask. But since we can have less than 316 * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array 317 * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to 318 * 0xFF, so we initialize the both arrays (DeviceRemovable and 319 * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each 320 * set of ports that actually exist. 321 */ 322 memset(desc->u.hs.DeviceRemovable, 0xff, 323 sizeof(desc->u.hs.DeviceRemovable)); 324 memset(desc->u.hs.PortPwrCtrlMask, 0xff, 325 sizeof(desc->u.hs.PortPwrCtrlMask)); 326 327 for (i = 0; i < (ports + 1 + 7) / 8; i++) 328 memset(&desc->u.hs.DeviceRemovable[i], port_removable[i], 329 sizeof(__u8)); 330 } 331 332 /* Fill in the USB 3.0 roothub descriptor */ 333 static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, 334 struct usb_hub_descriptor *desc) 335 { 336 int ports; 337 u16 port_removable; 338 u32 portsc; 339 unsigned int i; 340 struct xhci_hub *rhub; 341 342 rhub = &xhci->usb3_rhub; 343 ports = rhub->num_ports; 344 xhci_common_hub_descriptor(xhci, desc, ports); 345 desc->bDescriptorType = USB_DT_SS_HUB; 346 desc->bDescLength = USB_DT_SS_HUB_SIZE; 347 348 /* header decode latency should be zero for roothubs, 349 * see section 4.23.5.2. 350 */ 351 desc->u.ss.bHubHdrDecLat = 0; 352 desc->u.ss.wHubDelay = 0; 353 354 port_removable = 0; 355 /* bit 0 is reserved, bit 1 is for port 1, etc. */ 356 for (i = 0; i < ports; i++) { 357 portsc = readl(rhub->ports[i]->addr); 358 if (portsc & PORT_DEV_REMOVE) 359 port_removable |= 1 << (i + 1); 360 } 361 362 desc->u.ss.DeviceRemovable = cpu_to_le16(port_removable); 363 } 364 365 static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, 366 struct usb_hub_descriptor *desc) 367 { 368 369 if (hcd->speed >= HCD_USB3) 370 xhci_usb3_hub_descriptor(hcd, xhci, desc); 371 else 372 xhci_usb2_hub_descriptor(hcd, xhci, desc); 373 374 } 375 376 static unsigned int xhci_port_speed(unsigned int port_status) 377 { 378 if (DEV_LOWSPEED(port_status)) 379 return USB_PORT_STAT_LOW_SPEED; 380 if (DEV_HIGHSPEED(port_status)) 381 return USB_PORT_STAT_HIGH_SPEED; 382 /* 383 * FIXME: Yes, we should check for full speed, but the core uses that as 384 * a default in portspeed() in usb/core/hub.c (which is the only place 385 * USB_PORT_STAT_*_SPEED is used). 386 */ 387 return 0; 388 } 389 390 /* 391 * These bits are Read Only (RO) and should be saved and written to the 392 * registers: 0, 3, 10:13, 30 393 * connect status, over-current status, port speed, and device removable. 394 * connect status and port speed are also sticky - meaning they're in 395 * the AUX well and they aren't changed by a hot, warm, or cold reset. 396 */ 397 #define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30)) 398 /* 399 * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: 400 * bits 5:8, 9, 14:15, 25:27 401 * link state, port power, port indicator state, "wake on" enable state 402 */ 403 #define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25)) 404 /* 405 * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: 406 * bit 4 (port reset) 407 */ 408 #define XHCI_PORT_RW1S ((1<<4)) 409 /* 410 * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: 411 * bits 1, 17, 18, 19, 20, 21, 22, 23 412 * port enable/disable, and 413 * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports), 414 * over-current, reset, link state, and L1 change 415 */ 416 #define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17)) 417 /* 418 * Bit 16 is RW, and writing a '1' to it causes the link state control to be 419 * latched in 420 */ 421 #define XHCI_PORT_RW ((1<<16)) 422 /* 423 * These bits are Reserved Zero (RsvdZ) and zero should be written to them: 424 * bits 2, 24, 28:31 425 */ 426 #define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28)) 427 428 /* 429 * Given a port state, this function returns a value that would result in the 430 * port being in the same state, if the value was written to the port status 431 * control register. 432 * Save Read Only (RO) bits and save read/write bits where 433 * writing a 0 clears the bit and writing a 1 sets the bit (RWS). 434 * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect. 435 */ 436 u32 xhci_port_state_to_neutral(u32 state) 437 { 438 /* Save read-only status and port state */ 439 return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS); 440 } 441 442 /* 443 * find slot id based on port number. 444 * @port: The one-based port number from one of the two split roothubs. 445 */ 446 int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, 447 u16 port) 448 { 449 int slot_id; 450 int i; 451 enum usb_device_speed speed; 452 453 slot_id = 0; 454 for (i = 0; i < MAX_HC_SLOTS; i++) { 455 if (!xhci->devs[i] || !xhci->devs[i]->udev) 456 continue; 457 speed = xhci->devs[i]->udev->speed; 458 if (((speed >= USB_SPEED_SUPER) == (hcd->speed >= HCD_USB3)) 459 && xhci->devs[i]->fake_port == port) { 460 slot_id = i; 461 break; 462 } 463 } 464 465 return slot_id; 466 } 467 468 /* 469 * Stop device 470 * It issues stop endpoint command for EP 0 to 30. And wait the last command 471 * to complete. 472 * suspend will set to 1, if suspend bit need to set in command. 473 */ 474 static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend) 475 { 476 struct xhci_virt_device *virt_dev; 477 struct xhci_command *cmd; 478 unsigned long flags; 479 int ret; 480 int i; 481 482 ret = 0; 483 virt_dev = xhci->devs[slot_id]; 484 if (!virt_dev) 485 return -ENODEV; 486 487 trace_xhci_stop_device(virt_dev); 488 489 cmd = xhci_alloc_command(xhci, true, GFP_NOIO); 490 if (!cmd) 491 return -ENOMEM; 492 493 spin_lock_irqsave(&xhci->lock, flags); 494 for (i = LAST_EP_INDEX; i > 0; i--) { 495 if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) { 496 struct xhci_ep_ctx *ep_ctx; 497 struct xhci_command *command; 498 499 ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->out_ctx, i); 500 501 /* Check ep is running, required by AMD SNPS 3.1 xHC */ 502 if (GET_EP_CTX_STATE(ep_ctx) != EP_STATE_RUNNING) 503 continue; 504 505 command = xhci_alloc_command(xhci, false, GFP_NOWAIT); 506 if (!command) { 507 spin_unlock_irqrestore(&xhci->lock, flags); 508 ret = -ENOMEM; 509 goto cmd_cleanup; 510 } 511 512 ret = xhci_queue_stop_endpoint(xhci, command, slot_id, 513 i, suspend); 514 if (ret) { 515 spin_unlock_irqrestore(&xhci->lock, flags); 516 xhci_free_command(xhci, command); 517 goto cmd_cleanup; 518 } 519 } 520 } 521 ret = xhci_queue_stop_endpoint(xhci, cmd, slot_id, 0, suspend); 522 if (ret) { 523 spin_unlock_irqrestore(&xhci->lock, flags); 524 goto cmd_cleanup; 525 } 526 527 xhci_ring_cmd_db(xhci); 528 spin_unlock_irqrestore(&xhci->lock, flags); 529 530 /* Wait for last stop endpoint command to finish */ 531 wait_for_completion(cmd->completion); 532 533 if (cmd->status == COMP_COMMAND_ABORTED || 534 cmd->status == COMP_COMMAND_RING_STOPPED) { 535 xhci_warn(xhci, "Timeout while waiting for stop endpoint command\n"); 536 ret = -ETIME; 537 } 538 539 cmd_cleanup: 540 xhci_free_command(xhci, cmd); 541 return ret; 542 } 543 544 /* 545 * Ring device, it rings the all doorbells unconditionally. 546 */ 547 void xhci_ring_device(struct xhci_hcd *xhci, int slot_id) 548 { 549 int i, s; 550 struct xhci_virt_ep *ep; 551 552 for (i = 0; i < LAST_EP_INDEX + 1; i++) { 553 ep = &xhci->devs[slot_id]->eps[i]; 554 555 if (ep->ep_state & EP_HAS_STREAMS) { 556 for (s = 1; s < ep->stream_info->num_streams; s++) 557 xhci_ring_ep_doorbell(xhci, slot_id, i, s); 558 } else if (ep->ring && ep->ring->dequeue) { 559 xhci_ring_ep_doorbell(xhci, slot_id, i, 0); 560 } 561 } 562 563 return; 564 } 565 566 static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, 567 u16 wIndex, __le32 __iomem *addr, u32 port_status) 568 { 569 /* Don't allow the USB core to disable SuperSpeed ports. */ 570 if (hcd->speed >= HCD_USB3) { 571 xhci_dbg(xhci, "Ignoring request to disable " 572 "SuperSpeed port.\n"); 573 return; 574 } 575 576 if (xhci->quirks & XHCI_BROKEN_PORT_PED) { 577 xhci_dbg(xhci, 578 "Broken Port Enabled/Disabled, ignoring port disable request.\n"); 579 return; 580 } 581 582 /* Write 1 to disable the port */ 583 writel(port_status | PORT_PE, addr); 584 port_status = readl(addr); 585 xhci_dbg(xhci, "disable port %d-%d, portsc: 0x%x\n", 586 hcd->self.busnum, wIndex + 1, port_status); 587 } 588 589 static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue, 590 u16 wIndex, __le32 __iomem *addr, u32 port_status) 591 { 592 char *port_change_bit; 593 u32 status; 594 595 switch (wValue) { 596 case USB_PORT_FEAT_C_RESET: 597 status = PORT_RC; 598 port_change_bit = "reset"; 599 break; 600 case USB_PORT_FEAT_C_BH_PORT_RESET: 601 status = PORT_WRC; 602 port_change_bit = "warm(BH) reset"; 603 break; 604 case USB_PORT_FEAT_C_CONNECTION: 605 status = PORT_CSC; 606 port_change_bit = "connect"; 607 break; 608 case USB_PORT_FEAT_C_OVER_CURRENT: 609 status = PORT_OCC; 610 port_change_bit = "over-current"; 611 break; 612 case USB_PORT_FEAT_C_ENABLE: 613 status = PORT_PEC; 614 port_change_bit = "enable/disable"; 615 break; 616 case USB_PORT_FEAT_C_SUSPEND: 617 status = PORT_PLC; 618 port_change_bit = "suspend/resume"; 619 break; 620 case USB_PORT_FEAT_C_PORT_LINK_STATE: 621 status = PORT_PLC; 622 port_change_bit = "link state"; 623 break; 624 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR: 625 status = PORT_CEC; 626 port_change_bit = "config error"; 627 break; 628 default: 629 /* Should never happen */ 630 return; 631 } 632 /* Change bits are all write 1 to clear */ 633 writel(port_status | status, addr); 634 port_status = readl(addr); 635 636 xhci_dbg(xhci, "clear port%d %s change, portsc: 0x%x\n", 637 wIndex + 1, port_change_bit, port_status); 638 } 639 640 struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd) 641 { 642 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 643 644 if (hcd->speed >= HCD_USB3) 645 return &xhci->usb3_rhub; 646 return &xhci->usb2_rhub; 647 } 648 649 /* 650 * xhci_set_port_power() must be called with xhci->lock held. 651 * It will release and re-aquire the lock while calling ACPI 652 * method. 653 */ 654 static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, 655 u16 index, bool on, unsigned long *flags) 656 __must_hold(&xhci->lock) 657 { 658 struct xhci_hub *rhub; 659 struct xhci_port *port; 660 u32 temp; 661 662 rhub = xhci_get_rhub(hcd); 663 port = rhub->ports[index]; 664 temp = readl(port->addr); 665 666 xhci_dbg(xhci, "set port power %d-%d %s, portsc: 0x%x\n", 667 hcd->self.busnum, index + 1, on ? "ON" : "OFF", temp); 668 669 temp = xhci_port_state_to_neutral(temp); 670 671 if (on) { 672 /* Power on */ 673 writel(temp | PORT_POWER, port->addr); 674 readl(port->addr); 675 } else { 676 /* Power off */ 677 writel(temp & ~PORT_POWER, port->addr); 678 } 679 680 spin_unlock_irqrestore(&xhci->lock, *flags); 681 temp = usb_acpi_power_manageable(hcd->self.root_hub, 682 index); 683 if (temp) 684 usb_acpi_set_power_state(hcd->self.root_hub, 685 index, on); 686 spin_lock_irqsave(&xhci->lock, *flags); 687 } 688 689 static void xhci_port_set_test_mode(struct xhci_hcd *xhci, 690 u16 test_mode, u16 wIndex) 691 { 692 u32 temp; 693 struct xhci_port *port; 694 695 /* xhci only supports test mode for usb2 ports */ 696 port = xhci->usb2_rhub.ports[wIndex]; 697 temp = readl(port->addr + PORTPMSC); 698 temp |= test_mode << PORT_TEST_MODE_SHIFT; 699 writel(temp, port->addr + PORTPMSC); 700 xhci->test_mode = test_mode; 701 if (test_mode == USB_TEST_FORCE_ENABLE) 702 xhci_start(xhci); 703 } 704 705 static int xhci_enter_test_mode(struct xhci_hcd *xhci, 706 u16 test_mode, u16 wIndex, unsigned long *flags) 707 __must_hold(&xhci->lock) 708 { 709 int i, retval; 710 711 /* Disable all Device Slots */ 712 xhci_dbg(xhci, "Disable all slots\n"); 713 spin_unlock_irqrestore(&xhci->lock, *flags); 714 for (i = 1; i <= HCS_MAX_SLOTS(xhci->hcs_params1); i++) { 715 if (!xhci->devs[i]) 716 continue; 717 718 retval = xhci_disable_slot(xhci, i); 719 if (retval) 720 xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n", 721 i, retval); 722 } 723 spin_lock_irqsave(&xhci->lock, *flags); 724 /* Put all ports to the Disable state by clear PP */ 725 xhci_dbg(xhci, "Disable all port (PP = 0)\n"); 726 /* Power off USB3 ports*/ 727 for (i = 0; i < xhci->usb3_rhub.num_ports; i++) 728 xhci_set_port_power(xhci, xhci->shared_hcd, i, false, flags); 729 /* Power off USB2 ports*/ 730 for (i = 0; i < xhci->usb2_rhub.num_ports; i++) 731 xhci_set_port_power(xhci, xhci->main_hcd, i, false, flags); 732 /* Stop the controller */ 733 xhci_dbg(xhci, "Stop controller\n"); 734 retval = xhci_halt(xhci); 735 if (retval) 736 return retval; 737 /* Disable runtime PM for test mode */ 738 pm_runtime_forbid(xhci_to_hcd(xhci)->self.controller); 739 /* Set PORTPMSC.PTC field to enter selected test mode */ 740 /* Port is selected by wIndex. port_id = wIndex + 1 */ 741 xhci_dbg(xhci, "Enter Test Mode: %d, Port_id=%d\n", 742 test_mode, wIndex + 1); 743 xhci_port_set_test_mode(xhci, test_mode, wIndex); 744 return retval; 745 } 746 747 static int xhci_exit_test_mode(struct xhci_hcd *xhci) 748 { 749 int retval; 750 751 if (!xhci->test_mode) { 752 xhci_err(xhci, "Not in test mode, do nothing.\n"); 753 return 0; 754 } 755 if (xhci->test_mode == USB_TEST_FORCE_ENABLE && 756 !(xhci->xhc_state & XHCI_STATE_HALTED)) { 757 retval = xhci_halt(xhci); 758 if (retval) 759 return retval; 760 } 761 pm_runtime_allow(xhci_to_hcd(xhci)->self.controller); 762 xhci->test_mode = 0; 763 return xhci_reset(xhci); 764 } 765 766 void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port, 767 u32 link_state) 768 { 769 u32 temp; 770 u32 portsc; 771 772 portsc = readl(port->addr); 773 temp = xhci_port_state_to_neutral(portsc); 774 temp &= ~PORT_PLS_MASK; 775 temp |= PORT_LINK_STROBE | link_state; 776 writel(temp, port->addr); 777 778 xhci_dbg(xhci, "Set port %d-%d link state, portsc: 0x%x, write 0x%x", 779 port->rhub->hcd->self.busnum, port->hcd_portnum + 1, 780 portsc, temp); 781 } 782 783 static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci, 784 struct xhci_port *port, u16 wake_mask) 785 { 786 u32 temp; 787 788 temp = readl(port->addr); 789 temp = xhci_port_state_to_neutral(temp); 790 791 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT) 792 temp |= PORT_WKCONN_E; 793 else 794 temp &= ~PORT_WKCONN_E; 795 796 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT) 797 temp |= PORT_WKDISC_E; 798 else 799 temp &= ~PORT_WKDISC_E; 800 801 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT) 802 temp |= PORT_WKOC_E; 803 else 804 temp &= ~PORT_WKOC_E; 805 806 writel(temp, port->addr); 807 } 808 809 /* Test and clear port RWC bit */ 810 void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port, 811 u32 port_bit) 812 { 813 u32 temp; 814 815 temp = readl(port->addr); 816 if (temp & port_bit) { 817 temp = xhci_port_state_to_neutral(temp); 818 temp |= port_bit; 819 writel(temp, port->addr); 820 } 821 } 822 823 /* Updates Link Status for super Speed port */ 824 static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci, 825 u32 *status, u32 status_reg) 826 { 827 u32 pls = status_reg & PORT_PLS_MASK; 828 829 /* When the CAS bit is set then warm reset 830 * should be performed on port 831 */ 832 if (status_reg & PORT_CAS) { 833 /* The CAS bit can be set while the port is 834 * in any link state. 835 * Only roothubs have CAS bit, so we 836 * pretend to be in compliance mode 837 * unless we're already in compliance 838 * or the inactive state. 839 */ 840 if (pls != USB_SS_PORT_LS_COMP_MOD && 841 pls != USB_SS_PORT_LS_SS_INACTIVE) { 842 pls = USB_SS_PORT_LS_COMP_MOD; 843 } 844 /* Return also connection bit - 845 * hub state machine resets port 846 * when this bit is set. 847 */ 848 pls |= USB_PORT_STAT_CONNECTION; 849 } else { 850 /* 851 * Resume state is an xHCI internal state. Do not report it to 852 * usb core, instead, pretend to be U3, thus usb core knows 853 * it's not ready for transfer. 854 */ 855 if (pls == XDEV_RESUME) { 856 *status |= USB_SS_PORT_LS_U3; 857 return; 858 } 859 860 /* 861 * If CAS bit isn't set but the Port is already at 862 * Compliance Mode, fake a connection so the USB core 863 * notices the Compliance state and resets the port. 864 * This resolves an issue generated by the SN65LVPE502CP 865 * in which sometimes the port enters compliance mode 866 * caused by a delay on the host-device negotiation. 867 */ 868 if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && 869 (pls == USB_SS_PORT_LS_COMP_MOD)) 870 pls |= USB_PORT_STAT_CONNECTION; 871 } 872 873 /* update status field */ 874 *status |= pls; 875 } 876 877 /* 878 * Function for Compliance Mode Quirk. 879 * 880 * This Function verifies if all xhc USB3 ports have entered U0, if so, 881 * the compliance mode timer is deleted. A port won't enter 882 * compliance mode if it has previously entered U0. 883 */ 884 static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status, 885 u16 wIndex) 886 { 887 u32 all_ports_seen_u0 = ((1 << xhci->usb3_rhub.num_ports) - 1); 888 bool port_in_u0 = ((status & PORT_PLS_MASK) == XDEV_U0); 889 890 if (!(xhci->quirks & XHCI_COMP_MODE_QUIRK)) 891 return; 892 893 if ((xhci->port_status_u0 != all_ports_seen_u0) && port_in_u0) { 894 xhci->port_status_u0 |= 1 << wIndex; 895 if (xhci->port_status_u0 == all_ports_seen_u0) { 896 del_timer_sync(&xhci->comp_mode_recovery_timer); 897 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, 898 "All USB3 ports have entered U0 already!"); 899 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, 900 "Compliance Mode Recovery Timer Deleted."); 901 } 902 } 903 } 904 905 static int xhci_handle_usb2_port_link_resume(struct xhci_port *port, 906 u32 *status, u32 portsc, 907 unsigned long *flags) 908 { 909 struct xhci_bus_state *bus_state; 910 struct xhci_hcd *xhci; 911 struct usb_hcd *hcd; 912 int slot_id; 913 u32 wIndex; 914 915 hcd = port->rhub->hcd; 916 bus_state = &port->rhub->bus_state; 917 xhci = hcd_to_xhci(hcd); 918 wIndex = port->hcd_portnum; 919 920 if ((portsc & PORT_RESET) || !(portsc & PORT_PE)) { 921 *status = 0xffffffff; 922 return -EINVAL; 923 } 924 /* did port event handler already start resume timing? */ 925 if (!bus_state->resume_done[wIndex]) { 926 /* If not, maybe we are in a host initated resume? */ 927 if (test_bit(wIndex, &bus_state->resuming_ports)) { 928 /* Host initated resume doesn't time the resume 929 * signalling using resume_done[]. 930 * It manually sets RESUME state, sleeps 20ms 931 * and sets U0 state. This should probably be 932 * changed, but not right now. 933 */ 934 } else { 935 /* port resume was discovered now and here, 936 * start resume timing 937 */ 938 unsigned long timeout = jiffies + 939 msecs_to_jiffies(USB_RESUME_TIMEOUT); 940 941 set_bit(wIndex, &bus_state->resuming_ports); 942 bus_state->resume_done[wIndex] = timeout; 943 mod_timer(&hcd->rh_timer, timeout); 944 usb_hcd_start_port_resume(&hcd->self, wIndex); 945 } 946 /* Has resume been signalled for USB_RESUME_TIME yet? */ 947 } else if (time_after_eq(jiffies, bus_state->resume_done[wIndex])) { 948 int time_left; 949 950 xhci_dbg(xhci, "resume USB2 port %d-%d\n", 951 hcd->self.busnum, wIndex + 1); 952 953 bus_state->resume_done[wIndex] = 0; 954 clear_bit(wIndex, &bus_state->resuming_ports); 955 956 set_bit(wIndex, &bus_state->rexit_ports); 957 958 xhci_test_and_clear_bit(xhci, port, PORT_PLC); 959 xhci_set_link_state(xhci, port, XDEV_U0); 960 961 spin_unlock_irqrestore(&xhci->lock, *flags); 962 time_left = wait_for_completion_timeout( 963 &bus_state->rexit_done[wIndex], 964 msecs_to_jiffies(XHCI_MAX_REXIT_TIMEOUT_MS)); 965 spin_lock_irqsave(&xhci->lock, *flags); 966 967 if (time_left) { 968 slot_id = xhci_find_slot_id_by_port(hcd, xhci, 969 wIndex + 1); 970 if (!slot_id) { 971 xhci_dbg(xhci, "slot_id is zero\n"); 972 *status = 0xffffffff; 973 return -ENODEV; 974 } 975 xhci_ring_device(xhci, slot_id); 976 } else { 977 int port_status = readl(port->addr); 978 979 xhci_warn(xhci, "Port resume timed out, port %d-%d: 0x%x\n", 980 hcd->self.busnum, wIndex + 1, port_status); 981 *status |= USB_PORT_STAT_SUSPEND; 982 clear_bit(wIndex, &bus_state->rexit_ports); 983 } 984 985 usb_hcd_end_port_resume(&hcd->self, wIndex); 986 bus_state->port_c_suspend |= 1 << wIndex; 987 bus_state->suspended_ports &= ~(1 << wIndex); 988 } else { 989 /* 990 * The resume has been signaling for less than 991 * USB_RESUME_TIME. Report the port status as SUSPEND, 992 * let the usbcore check port status again and clear 993 * resume signaling later. 994 */ 995 *status |= USB_PORT_STAT_SUSPEND; 996 } 997 return 0; 998 } 999 1000 static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li) 1001 { 1002 u32 ext_stat = 0; 1003 int speed_id; 1004 1005 /* only support rx and tx lane counts of 1 in usb3.1 spec */ 1006 speed_id = DEV_PORT_SPEED(raw_port_status); 1007 ext_stat |= speed_id; /* bits 3:0, RX speed id */ 1008 ext_stat |= speed_id << 4; /* bits 7:4, TX speed id */ 1009 1010 ext_stat |= PORT_RX_LANES(port_li) << 8; /* bits 11:8 Rx lane count */ 1011 ext_stat |= PORT_TX_LANES(port_li) << 12; /* bits 15:12 Tx lane count */ 1012 1013 return ext_stat; 1014 } 1015 1016 static void xhci_get_usb3_port_status(struct xhci_port *port, u32 *status, 1017 u32 portsc) 1018 { 1019 struct xhci_bus_state *bus_state; 1020 struct xhci_hcd *xhci; 1021 struct usb_hcd *hcd; 1022 u32 link_state; 1023 u32 portnum; 1024 1025 bus_state = &port->rhub->bus_state; 1026 xhci = hcd_to_xhci(port->rhub->hcd); 1027 hcd = port->rhub->hcd; 1028 link_state = portsc & PORT_PLS_MASK; 1029 portnum = port->hcd_portnum; 1030 1031 /* USB3 specific wPortChange bits 1032 * 1033 * Port link change with port in resume state should not be 1034 * reported to usbcore, as this is an internal state to be 1035 * handled by xhci driver. Reporting PLC to usbcore may 1036 * cause usbcore clearing PLC first and port change event 1037 * irq won't be generated. 1038 */ 1039 1040 if (portsc & PORT_PLC && (link_state != XDEV_RESUME)) 1041 *status |= USB_PORT_STAT_C_LINK_STATE << 16; 1042 if (portsc & PORT_WRC) 1043 *status |= USB_PORT_STAT_C_BH_RESET << 16; 1044 if (portsc & PORT_CEC) 1045 *status |= USB_PORT_STAT_C_CONFIG_ERROR << 16; 1046 1047 /* USB3 specific wPortStatus bits */ 1048 if (portsc & PORT_POWER) { 1049 *status |= USB_SS_PORT_STAT_POWER; 1050 /* link state handling */ 1051 if (link_state == XDEV_U0) 1052 bus_state->suspended_ports &= ~(1 << portnum); 1053 } 1054 1055 /* remote wake resume signaling complete */ 1056 if (bus_state->port_remote_wakeup & (1 << portnum) && 1057 link_state != XDEV_RESUME && 1058 link_state != XDEV_RECOVERY) { 1059 bus_state->port_remote_wakeup &= ~(1 << portnum); 1060 usb_hcd_end_port_resume(&hcd->self, portnum); 1061 } 1062 1063 xhci_hub_report_usb3_link_state(xhci, status, portsc); 1064 xhci_del_comp_mod_timer(xhci, portsc, portnum); 1065 } 1066 1067 static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status, 1068 u32 portsc, unsigned long *flags) 1069 { 1070 struct xhci_bus_state *bus_state; 1071 u32 link_state; 1072 u32 portnum; 1073 int ret; 1074 1075 bus_state = &port->rhub->bus_state; 1076 link_state = portsc & PORT_PLS_MASK; 1077 portnum = port->hcd_portnum; 1078 1079 /* USB2 wPortStatus bits */ 1080 if (portsc & PORT_POWER) { 1081 *status |= USB_PORT_STAT_POWER; 1082 1083 /* link state is only valid if port is powered */ 1084 if (link_state == XDEV_U3) 1085 *status |= USB_PORT_STAT_SUSPEND; 1086 if (link_state == XDEV_U2) 1087 *status |= USB_PORT_STAT_L1; 1088 if (link_state == XDEV_U0) { 1089 bus_state->resume_done[portnum] = 0; 1090 clear_bit(portnum, &bus_state->resuming_ports); 1091 if (bus_state->suspended_ports & (1 << portnum)) { 1092 bus_state->suspended_ports &= ~(1 << portnum); 1093 bus_state->port_c_suspend |= 1 << portnum; 1094 } 1095 } 1096 if (link_state == XDEV_RESUME) { 1097 ret = xhci_handle_usb2_port_link_resume(port, status, 1098 portsc, flags); 1099 if (ret) 1100 return; 1101 } 1102 } 1103 } 1104 1105 /* 1106 * Converts a raw xHCI port status into the format that external USB 2.0 or USB 1107 * 3.0 hubs use. 1108 * 1109 * Possible side effects: 1110 * - Mark a port as being done with device resume, 1111 * and ring the endpoint doorbells. 1112 * - Stop the Synopsys redriver Compliance Mode polling. 1113 * - Drop and reacquire the xHCI lock, in order to wait for port resume. 1114 */ 1115 static u32 xhci_get_port_status(struct usb_hcd *hcd, 1116 struct xhci_bus_state *bus_state, 1117 u16 wIndex, u32 raw_port_status, 1118 unsigned long *flags) 1119 __releases(&xhci->lock) 1120 __acquires(&xhci->lock) 1121 { 1122 u32 status = 0; 1123 struct xhci_hub *rhub; 1124 struct xhci_port *port; 1125 1126 rhub = xhci_get_rhub(hcd); 1127 port = rhub->ports[wIndex]; 1128 1129 /* common wPortChange bits */ 1130 if (raw_port_status & PORT_CSC) 1131 status |= USB_PORT_STAT_C_CONNECTION << 16; 1132 if (raw_port_status & PORT_PEC) 1133 status |= USB_PORT_STAT_C_ENABLE << 16; 1134 if ((raw_port_status & PORT_OCC)) 1135 status |= USB_PORT_STAT_C_OVERCURRENT << 16; 1136 if ((raw_port_status & PORT_RC)) 1137 status |= USB_PORT_STAT_C_RESET << 16; 1138 1139 /* common wPortStatus bits */ 1140 if (raw_port_status & PORT_CONNECT) { 1141 status |= USB_PORT_STAT_CONNECTION; 1142 status |= xhci_port_speed(raw_port_status); 1143 } 1144 if (raw_port_status & PORT_PE) 1145 status |= USB_PORT_STAT_ENABLE; 1146 if (raw_port_status & PORT_OC) 1147 status |= USB_PORT_STAT_OVERCURRENT; 1148 if (raw_port_status & PORT_RESET) 1149 status |= USB_PORT_STAT_RESET; 1150 1151 /* USB2 and USB3 specific bits, including Port Link State */ 1152 if (hcd->speed >= HCD_USB3) 1153 xhci_get_usb3_port_status(port, &status, raw_port_status); 1154 else 1155 xhci_get_usb2_port_status(port, &status, raw_port_status, 1156 flags); 1157 /* 1158 * Clear stale usb2 resume signalling variables in case port changed 1159 * state during resume signalling. For example on error 1160 */ 1161 if ((bus_state->resume_done[wIndex] || 1162 test_bit(wIndex, &bus_state->resuming_ports)) && 1163 (raw_port_status & PORT_PLS_MASK) != XDEV_U3 && 1164 (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) { 1165 bus_state->resume_done[wIndex] = 0; 1166 clear_bit(wIndex, &bus_state->resuming_ports); 1167 usb_hcd_end_port_resume(&hcd->self, wIndex); 1168 } 1169 1170 if (bus_state->port_c_suspend & (1 << wIndex)) 1171 status |= USB_PORT_STAT_C_SUSPEND << 16; 1172 1173 return status; 1174 } 1175 1176 int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 1177 u16 wIndex, char *buf, u16 wLength) 1178 { 1179 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 1180 int max_ports; 1181 unsigned long flags; 1182 u32 temp, status; 1183 int retval = 0; 1184 int slot_id; 1185 struct xhci_bus_state *bus_state; 1186 u16 link_state = 0; 1187 u16 wake_mask = 0; 1188 u16 timeout = 0; 1189 u16 test_mode = 0; 1190 struct xhci_hub *rhub; 1191 struct xhci_port **ports; 1192 1193 rhub = xhci_get_rhub(hcd); 1194 ports = rhub->ports; 1195 max_ports = rhub->num_ports; 1196 bus_state = &rhub->bus_state; 1197 1198 spin_lock_irqsave(&xhci->lock, flags); 1199 switch (typeReq) { 1200 case GetHubStatus: 1201 /* No power source, over-current reported per port */ 1202 memset(buf, 0, 4); 1203 break; 1204 case GetHubDescriptor: 1205 /* Check to make sure userspace is asking for the USB 3.0 hub 1206 * descriptor for the USB 3.0 roothub. If not, we stall the 1207 * endpoint, like external hubs do. 1208 */ 1209 if (hcd->speed >= HCD_USB3 && 1210 (wLength < USB_DT_SS_HUB_SIZE || 1211 wValue != (USB_DT_SS_HUB << 8))) { 1212 xhci_dbg(xhci, "Wrong hub descriptor type for " 1213 "USB 3.0 roothub.\n"); 1214 goto error; 1215 } 1216 xhci_hub_descriptor(hcd, xhci, 1217 (struct usb_hub_descriptor *) buf); 1218 break; 1219 case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 1220 if ((wValue & 0xff00) != (USB_DT_BOS << 8)) 1221 goto error; 1222 1223 if (hcd->speed < HCD_USB3) 1224 goto error; 1225 1226 retval = xhci_create_usb3x_bos_desc(xhci, buf, wLength); 1227 spin_unlock_irqrestore(&xhci->lock, flags); 1228 return retval; 1229 case GetPortStatus: 1230 if (!wIndex || wIndex > max_ports) 1231 goto error; 1232 wIndex--; 1233 temp = readl(ports[wIndex]->addr); 1234 if (temp == ~(u32)0) { 1235 xhci_hc_died(xhci); 1236 retval = -ENODEV; 1237 break; 1238 } 1239 trace_xhci_get_port_status(wIndex, temp); 1240 status = xhci_get_port_status(hcd, bus_state, wIndex, temp, 1241 &flags); 1242 if (status == 0xffffffff) 1243 goto error; 1244 1245 xhci_dbg(xhci, "Get port status %d-%d read: 0x%x, return 0x%x", 1246 hcd->self.busnum, wIndex + 1, temp, status); 1247 1248 put_unaligned(cpu_to_le32(status), (__le32 *) buf); 1249 /* if USB 3.1 extended port status return additional 4 bytes */ 1250 if (wValue == 0x02) { 1251 u32 port_li; 1252 1253 if (hcd->speed < HCD_USB31 || wLength != 8) { 1254 xhci_err(xhci, "get ext port status invalid parameter\n"); 1255 retval = -EINVAL; 1256 break; 1257 } 1258 port_li = readl(ports[wIndex]->addr + PORTLI); 1259 status = xhci_get_ext_port_status(temp, port_li); 1260 put_unaligned_le32(status, &buf[4]); 1261 } 1262 break; 1263 case SetPortFeature: 1264 if (wValue == USB_PORT_FEAT_LINK_STATE) 1265 link_state = (wIndex & 0xff00) >> 3; 1266 if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK) 1267 wake_mask = wIndex & 0xff00; 1268 if (wValue == USB_PORT_FEAT_TEST) 1269 test_mode = (wIndex & 0xff00) >> 8; 1270 /* The MSB of wIndex is the U1/U2 timeout */ 1271 timeout = (wIndex & 0xff00) >> 8; 1272 wIndex &= 0xff; 1273 if (!wIndex || wIndex > max_ports) 1274 goto error; 1275 wIndex--; 1276 temp = readl(ports[wIndex]->addr); 1277 if (temp == ~(u32)0) { 1278 xhci_hc_died(xhci); 1279 retval = -ENODEV; 1280 break; 1281 } 1282 temp = xhci_port_state_to_neutral(temp); 1283 /* FIXME: What new port features do we need to support? */ 1284 switch (wValue) { 1285 case USB_PORT_FEAT_SUSPEND: 1286 temp = readl(ports[wIndex]->addr); 1287 if ((temp & PORT_PLS_MASK) != XDEV_U0) { 1288 /* Resume the port to U0 first */ 1289 xhci_set_link_state(xhci, ports[wIndex], 1290 XDEV_U0); 1291 spin_unlock_irqrestore(&xhci->lock, flags); 1292 msleep(10); 1293 spin_lock_irqsave(&xhci->lock, flags); 1294 } 1295 /* In spec software should not attempt to suspend 1296 * a port unless the port reports that it is in the 1297 * enabled (PED = ‘1’,PLS < ‘3’) state. 1298 */ 1299 temp = readl(ports[wIndex]->addr); 1300 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) 1301 || (temp & PORT_PLS_MASK) >= XDEV_U3) { 1302 xhci_warn(xhci, "USB core suspending port %d-%d not in U0/U1/U2\n", 1303 hcd->self.busnum, wIndex + 1); 1304 goto error; 1305 } 1306 1307 slot_id = xhci_find_slot_id_by_port(hcd, xhci, 1308 wIndex + 1); 1309 if (!slot_id) { 1310 xhci_warn(xhci, "slot_id is zero\n"); 1311 goto error; 1312 } 1313 /* unlock to execute stop endpoint commands */ 1314 spin_unlock_irqrestore(&xhci->lock, flags); 1315 xhci_stop_device(xhci, slot_id, 1); 1316 spin_lock_irqsave(&xhci->lock, flags); 1317 1318 xhci_set_link_state(xhci, ports[wIndex], XDEV_U3); 1319 1320 spin_unlock_irqrestore(&xhci->lock, flags); 1321 msleep(10); /* wait device to enter */ 1322 spin_lock_irqsave(&xhci->lock, flags); 1323 1324 temp = readl(ports[wIndex]->addr); 1325 bus_state->suspended_ports |= 1 << wIndex; 1326 break; 1327 case USB_PORT_FEAT_LINK_STATE: 1328 temp = readl(ports[wIndex]->addr); 1329 /* Disable port */ 1330 if (link_state == USB_SS_PORT_LS_SS_DISABLED) { 1331 xhci_dbg(xhci, "Disable port %d-%d\n", 1332 hcd->self.busnum, wIndex + 1); 1333 temp = xhci_port_state_to_neutral(temp); 1334 /* 1335 * Clear all change bits, so that we get a new 1336 * connection event. 1337 */ 1338 temp |= PORT_CSC | PORT_PEC | PORT_WRC | 1339 PORT_OCC | PORT_RC | PORT_PLC | 1340 PORT_CEC; 1341 writel(temp | PORT_PE, ports[wIndex]->addr); 1342 temp = readl(ports[wIndex]->addr); 1343 break; 1344 } 1345 1346 /* Put link in RxDetect (enable port) */ 1347 if (link_state == USB_SS_PORT_LS_RX_DETECT) { 1348 xhci_dbg(xhci, "Enable port %d-%d\n", 1349 hcd->self.busnum, wIndex + 1); 1350 xhci_set_link_state(xhci, ports[wIndex], 1351 link_state); 1352 temp = readl(ports[wIndex]->addr); 1353 break; 1354 } 1355 1356 /* 1357 * For xHCI 1.1 according to section 4.19.1.2.4.1 a 1358 * root hub port's transition to compliance mode upon 1359 * detecting LFPS timeout may be controlled by an 1360 * Compliance Transition Enabled (CTE) flag (not 1361 * software visible). This flag is set by writing 0xA 1362 * to PORTSC PLS field which will allow transition to 1363 * compliance mode the next time LFPS timeout is 1364 * encountered. A warm reset will clear it. 1365 * 1366 * The CTE flag is only supported if the HCCPARAMS2 CTC 1367 * flag is set, otherwise, the compliance substate is 1368 * automatically entered as on 1.0 and prior. 1369 */ 1370 if (link_state == USB_SS_PORT_LS_COMP_MOD) { 1371 if (!HCC2_CTC(xhci->hcc_params2)) { 1372 xhci_dbg(xhci, "CTC flag is 0, port already supports entering compliance mode\n"); 1373 break; 1374 } 1375 1376 if ((temp & PORT_CONNECT)) { 1377 xhci_warn(xhci, "Can't set compliance mode when port is connected\n"); 1378 goto error; 1379 } 1380 1381 xhci_dbg(xhci, "Enable compliance mode transition for port %d-%d\n", 1382 hcd->self.busnum, wIndex + 1); 1383 xhci_set_link_state(xhci, ports[wIndex], 1384 link_state); 1385 1386 temp = readl(ports[wIndex]->addr); 1387 break; 1388 } 1389 /* Port must be enabled */ 1390 if (!(temp & PORT_PE)) { 1391 retval = -ENODEV; 1392 break; 1393 } 1394 /* Can't set port link state above '3' (U3) */ 1395 if (link_state > USB_SS_PORT_LS_U3) { 1396 xhci_warn(xhci, "Cannot set port %d-%d link state %d\n", 1397 hcd->self.busnum, wIndex + 1, 1398 link_state); 1399 goto error; 1400 } 1401 1402 /* 1403 * set link to U0, steps depend on current link state. 1404 * U3: set link to U0 and wait for u3exit completion. 1405 * U1/U2: no PLC complete event, only set link to U0. 1406 * Resume/Recovery: device initiated U0, only wait for 1407 * completion 1408 */ 1409 if (link_state == USB_SS_PORT_LS_U0) { 1410 u32 pls = temp & PORT_PLS_MASK; 1411 bool wait_u0 = false; 1412 1413 /* already in U0 */ 1414 if (pls == XDEV_U0) 1415 break; 1416 if (pls == XDEV_U3 || 1417 pls == XDEV_RESUME || 1418 pls == XDEV_RECOVERY) { 1419 wait_u0 = true; 1420 reinit_completion(&bus_state->u3exit_done[wIndex]); 1421 } 1422 if (pls <= XDEV_U3) /* U1, U2, U3 */ 1423 xhci_set_link_state(xhci, ports[wIndex], 1424 USB_SS_PORT_LS_U0); 1425 if (!wait_u0) { 1426 if (pls > XDEV_U3) 1427 goto error; 1428 break; 1429 } 1430 spin_unlock_irqrestore(&xhci->lock, flags); 1431 if (!wait_for_completion_timeout(&bus_state->u3exit_done[wIndex], 1432 msecs_to_jiffies(100))) 1433 xhci_dbg(xhci, "missing U0 port change event for port %d-%d\n", 1434 hcd->self.busnum, wIndex + 1); 1435 spin_lock_irqsave(&xhci->lock, flags); 1436 temp = readl(ports[wIndex]->addr); 1437 break; 1438 } 1439 1440 if (link_state == USB_SS_PORT_LS_U3) { 1441 int retries = 16; 1442 slot_id = xhci_find_slot_id_by_port(hcd, xhci, 1443 wIndex + 1); 1444 if (slot_id) { 1445 /* unlock to execute stop endpoint 1446 * commands */ 1447 spin_unlock_irqrestore(&xhci->lock, 1448 flags); 1449 xhci_stop_device(xhci, slot_id, 1); 1450 spin_lock_irqsave(&xhci->lock, flags); 1451 } 1452 xhci_set_link_state(xhci, ports[wIndex], USB_SS_PORT_LS_U3); 1453 spin_unlock_irqrestore(&xhci->lock, flags); 1454 while (retries--) { 1455 usleep_range(4000, 8000); 1456 temp = readl(ports[wIndex]->addr); 1457 if ((temp & PORT_PLS_MASK) == XDEV_U3) 1458 break; 1459 } 1460 spin_lock_irqsave(&xhci->lock, flags); 1461 temp = readl(ports[wIndex]->addr); 1462 bus_state->suspended_ports |= 1 << wIndex; 1463 } 1464 break; 1465 case USB_PORT_FEAT_POWER: 1466 /* 1467 * Turn on ports, even if there isn't per-port switching. 1468 * HC will report connect events even before this is set. 1469 * However, hub_wq will ignore the roothub events until 1470 * the roothub is registered. 1471 */ 1472 xhci_set_port_power(xhci, hcd, wIndex, true, &flags); 1473 break; 1474 case USB_PORT_FEAT_RESET: 1475 temp = (temp | PORT_RESET); 1476 writel(temp, ports[wIndex]->addr); 1477 1478 temp = readl(ports[wIndex]->addr); 1479 xhci_dbg(xhci, "set port reset, actual port %d-%d status = 0x%x\n", 1480 hcd->self.busnum, wIndex + 1, temp); 1481 break; 1482 case USB_PORT_FEAT_REMOTE_WAKE_MASK: 1483 xhci_set_remote_wake_mask(xhci, ports[wIndex], 1484 wake_mask); 1485 temp = readl(ports[wIndex]->addr); 1486 xhci_dbg(xhci, "set port remote wake mask, actual port %d-%d status = 0x%x\n", 1487 hcd->self.busnum, wIndex + 1, temp); 1488 break; 1489 case USB_PORT_FEAT_BH_PORT_RESET: 1490 temp |= PORT_WR; 1491 writel(temp, ports[wIndex]->addr); 1492 temp = readl(ports[wIndex]->addr); 1493 break; 1494 case USB_PORT_FEAT_U1_TIMEOUT: 1495 if (hcd->speed < HCD_USB3) 1496 goto error; 1497 temp = readl(ports[wIndex]->addr + PORTPMSC); 1498 temp &= ~PORT_U1_TIMEOUT_MASK; 1499 temp |= PORT_U1_TIMEOUT(timeout); 1500 writel(temp, ports[wIndex]->addr + PORTPMSC); 1501 break; 1502 case USB_PORT_FEAT_U2_TIMEOUT: 1503 if (hcd->speed < HCD_USB3) 1504 goto error; 1505 temp = readl(ports[wIndex]->addr + PORTPMSC); 1506 temp &= ~PORT_U2_TIMEOUT_MASK; 1507 temp |= PORT_U2_TIMEOUT(timeout); 1508 writel(temp, ports[wIndex]->addr + PORTPMSC); 1509 break; 1510 case USB_PORT_FEAT_TEST: 1511 /* 4.19.6 Port Test Modes (USB2 Test Mode) */ 1512 if (hcd->speed != HCD_USB2) 1513 goto error; 1514 if (test_mode > USB_TEST_FORCE_ENABLE || 1515 test_mode < USB_TEST_J) 1516 goto error; 1517 retval = xhci_enter_test_mode(xhci, test_mode, wIndex, 1518 &flags); 1519 break; 1520 default: 1521 goto error; 1522 } 1523 /* unblock any posted writes */ 1524 temp = readl(ports[wIndex]->addr); 1525 break; 1526 case ClearPortFeature: 1527 if (!wIndex || wIndex > max_ports) 1528 goto error; 1529 wIndex--; 1530 temp = readl(ports[wIndex]->addr); 1531 if (temp == ~(u32)0) { 1532 xhci_hc_died(xhci); 1533 retval = -ENODEV; 1534 break; 1535 } 1536 /* FIXME: What new port features do we need to support? */ 1537 temp = xhci_port_state_to_neutral(temp); 1538 switch (wValue) { 1539 case USB_PORT_FEAT_SUSPEND: 1540 temp = readl(ports[wIndex]->addr); 1541 xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n"); 1542 xhci_dbg(xhci, "PORTSC %04x\n", temp); 1543 if (temp & PORT_RESET) 1544 goto error; 1545 if ((temp & PORT_PLS_MASK) == XDEV_U3) { 1546 if ((temp & PORT_PE) == 0) 1547 goto error; 1548 1549 set_bit(wIndex, &bus_state->resuming_ports); 1550 usb_hcd_start_port_resume(&hcd->self, wIndex); 1551 xhci_set_link_state(xhci, ports[wIndex], 1552 XDEV_RESUME); 1553 spin_unlock_irqrestore(&xhci->lock, flags); 1554 msleep(USB_RESUME_TIMEOUT); 1555 spin_lock_irqsave(&xhci->lock, flags); 1556 xhci_set_link_state(xhci, ports[wIndex], 1557 XDEV_U0); 1558 clear_bit(wIndex, &bus_state->resuming_ports); 1559 usb_hcd_end_port_resume(&hcd->self, wIndex); 1560 } 1561 bus_state->port_c_suspend |= 1 << wIndex; 1562 1563 slot_id = xhci_find_slot_id_by_port(hcd, xhci, 1564 wIndex + 1); 1565 if (!slot_id) { 1566 xhci_dbg(xhci, "slot_id is zero\n"); 1567 goto error; 1568 } 1569 xhci_ring_device(xhci, slot_id); 1570 break; 1571 case USB_PORT_FEAT_C_SUSPEND: 1572 bus_state->port_c_suspend &= ~(1 << wIndex); 1573 fallthrough; 1574 case USB_PORT_FEAT_C_RESET: 1575 case USB_PORT_FEAT_C_BH_PORT_RESET: 1576 case USB_PORT_FEAT_C_CONNECTION: 1577 case USB_PORT_FEAT_C_OVER_CURRENT: 1578 case USB_PORT_FEAT_C_ENABLE: 1579 case USB_PORT_FEAT_C_PORT_LINK_STATE: 1580 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR: 1581 xhci_clear_port_change_bit(xhci, wValue, wIndex, 1582 ports[wIndex]->addr, temp); 1583 break; 1584 case USB_PORT_FEAT_ENABLE: 1585 xhci_disable_port(hcd, xhci, wIndex, 1586 ports[wIndex]->addr, temp); 1587 break; 1588 case USB_PORT_FEAT_POWER: 1589 xhci_set_port_power(xhci, hcd, wIndex, false, &flags); 1590 break; 1591 case USB_PORT_FEAT_TEST: 1592 retval = xhci_exit_test_mode(xhci); 1593 break; 1594 default: 1595 goto error; 1596 } 1597 break; 1598 default: 1599 error: 1600 /* "stall" on error */ 1601 retval = -EPIPE; 1602 } 1603 spin_unlock_irqrestore(&xhci->lock, flags); 1604 return retval; 1605 } 1606 1607 /* 1608 * Returns 0 if the status hasn't changed, or the number of bytes in buf. 1609 * Ports are 0-indexed from the HCD point of view, 1610 * and 1-indexed from the USB core pointer of view. 1611 * 1612 * Note that the status change bits will be cleared as soon as a port status 1613 * change event is generated, so we use the saved status from that event. 1614 */ 1615 int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) 1616 { 1617 unsigned long flags; 1618 u32 temp, status; 1619 u32 mask; 1620 int i, retval; 1621 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 1622 int max_ports; 1623 struct xhci_bus_state *bus_state; 1624 bool reset_change = false; 1625 struct xhci_hub *rhub; 1626 struct xhci_port **ports; 1627 1628 rhub = xhci_get_rhub(hcd); 1629 ports = rhub->ports; 1630 max_ports = rhub->num_ports; 1631 bus_state = &rhub->bus_state; 1632 1633 /* Initial status is no changes */ 1634 retval = (max_ports + 8) / 8; 1635 memset(buf, 0, retval); 1636 1637 /* 1638 * Inform the usbcore about resume-in-progress by returning 1639 * a non-zero value even if there are no status changes. 1640 */ 1641 status = bus_state->resuming_ports; 1642 1643 mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC | PORT_CEC; 1644 1645 spin_lock_irqsave(&xhci->lock, flags); 1646 /* For each port, did anything change? If so, set that bit in buf. */ 1647 for (i = 0; i < max_ports; i++) { 1648 temp = readl(ports[i]->addr); 1649 if (temp == ~(u32)0) { 1650 xhci_hc_died(xhci); 1651 retval = -ENODEV; 1652 break; 1653 } 1654 trace_xhci_hub_status_data(i, temp); 1655 1656 if ((temp & mask) != 0 || 1657 (bus_state->port_c_suspend & 1 << i) || 1658 (bus_state->resume_done[i] && time_after_eq( 1659 jiffies, bus_state->resume_done[i]))) { 1660 buf[(i + 1) / 8] |= 1 << (i + 1) % 8; 1661 status = 1; 1662 } 1663 if ((temp & PORT_RC)) 1664 reset_change = true; 1665 if (temp & PORT_OC) 1666 status = 1; 1667 } 1668 if (!status && !reset_change) { 1669 xhci_dbg(xhci, "%s: stopping port polling.\n", __func__); 1670 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 1671 } 1672 spin_unlock_irqrestore(&xhci->lock, flags); 1673 return status ? retval : 0; 1674 } 1675 1676 #ifdef CONFIG_PM 1677 1678 int xhci_bus_suspend(struct usb_hcd *hcd) 1679 { 1680 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 1681 int max_ports, port_index; 1682 struct xhci_bus_state *bus_state; 1683 unsigned long flags; 1684 struct xhci_hub *rhub; 1685 struct xhci_port **ports; 1686 u32 portsc_buf[USB_MAXCHILDREN]; 1687 bool wake_enabled; 1688 1689 rhub = xhci_get_rhub(hcd); 1690 ports = rhub->ports; 1691 max_ports = rhub->num_ports; 1692 bus_state = &rhub->bus_state; 1693 wake_enabled = hcd->self.root_hub->do_remote_wakeup; 1694 1695 spin_lock_irqsave(&xhci->lock, flags); 1696 1697 if (wake_enabled) { 1698 if (bus_state->resuming_ports || /* USB2 */ 1699 bus_state->port_remote_wakeup) { /* USB3 */ 1700 spin_unlock_irqrestore(&xhci->lock, flags); 1701 xhci_dbg(xhci, "suspend failed because a port is resuming\n"); 1702 return -EBUSY; 1703 } 1704 } 1705 /* 1706 * Prepare ports for suspend, but don't write anything before all ports 1707 * are checked and we know bus suspend can proceed 1708 */ 1709 bus_state->bus_suspended = 0; 1710 port_index = max_ports; 1711 while (port_index--) { 1712 u32 t1, t2; 1713 int retries = 10; 1714 retry: 1715 t1 = readl(ports[port_index]->addr); 1716 t2 = xhci_port_state_to_neutral(t1); 1717 portsc_buf[port_index] = 0; 1718 1719 /* 1720 * Give a USB3 port in link training time to finish, but don't 1721 * prevent suspend as port might be stuck 1722 */ 1723 if ((hcd->speed >= HCD_USB3) && retries-- && 1724 (t1 & PORT_PLS_MASK) == XDEV_POLLING) { 1725 spin_unlock_irqrestore(&xhci->lock, flags); 1726 msleep(XHCI_PORT_POLLING_LFPS_TIME); 1727 spin_lock_irqsave(&xhci->lock, flags); 1728 xhci_dbg(xhci, "port %d-%d polling in bus suspend, waiting\n", 1729 hcd->self.busnum, port_index + 1); 1730 goto retry; 1731 } 1732 /* bail out if port detected a over-current condition */ 1733 if (t1 & PORT_OC) { 1734 bus_state->bus_suspended = 0; 1735 spin_unlock_irqrestore(&xhci->lock, flags); 1736 xhci_dbg(xhci, "Bus suspend bailout, port over-current detected\n"); 1737 return -EBUSY; 1738 } 1739 /* suspend ports in U0, or bail out for new connect changes */ 1740 if ((t1 & PORT_PE) && (t1 & PORT_PLS_MASK) == XDEV_U0) { 1741 if ((t1 & PORT_CSC) && wake_enabled) { 1742 bus_state->bus_suspended = 0; 1743 spin_unlock_irqrestore(&xhci->lock, flags); 1744 xhci_dbg(xhci, "Bus suspend bailout, port connect change\n"); 1745 return -EBUSY; 1746 } 1747 xhci_dbg(xhci, "port %d-%d not suspended\n", 1748 hcd->self.busnum, port_index + 1); 1749 t2 &= ~PORT_PLS_MASK; 1750 t2 |= PORT_LINK_STROBE | XDEV_U3; 1751 set_bit(port_index, &bus_state->bus_suspended); 1752 } 1753 /* USB core sets remote wake mask for USB 3.0 hubs, 1754 * including the USB 3.0 roothub, but only if CONFIG_PM 1755 * is enabled, so also enable remote wake here. 1756 */ 1757 if (wake_enabled) { 1758 if (t1 & PORT_CONNECT) { 1759 t2 |= PORT_WKOC_E | PORT_WKDISC_E; 1760 t2 &= ~PORT_WKCONN_E; 1761 } else { 1762 t2 |= PORT_WKOC_E | PORT_WKCONN_E; 1763 t2 &= ~PORT_WKDISC_E; 1764 } 1765 1766 if ((xhci->quirks & XHCI_U2_DISABLE_WAKE) && 1767 (hcd->speed < HCD_USB3)) { 1768 if (usb_amd_pt_check_port(hcd->self.controller, 1769 port_index)) 1770 t2 &= ~PORT_WAKE_BITS; 1771 } 1772 } else 1773 t2 &= ~PORT_WAKE_BITS; 1774 1775 t1 = xhci_port_state_to_neutral(t1); 1776 if (t1 != t2) 1777 portsc_buf[port_index] = t2; 1778 } 1779 1780 /* write port settings, stopping and suspending ports if needed */ 1781 port_index = max_ports; 1782 while (port_index--) { 1783 if (!portsc_buf[port_index]) 1784 continue; 1785 if (test_bit(port_index, &bus_state->bus_suspended)) { 1786 int slot_id; 1787 1788 slot_id = xhci_find_slot_id_by_port(hcd, xhci, 1789 port_index + 1); 1790 if (slot_id) { 1791 spin_unlock_irqrestore(&xhci->lock, flags); 1792 xhci_stop_device(xhci, slot_id, 1); 1793 spin_lock_irqsave(&xhci->lock, flags); 1794 } 1795 } 1796 writel(portsc_buf[port_index], ports[port_index]->addr); 1797 } 1798 hcd->state = HC_STATE_SUSPENDED; 1799 bus_state->next_statechange = jiffies + msecs_to_jiffies(10); 1800 spin_unlock_irqrestore(&xhci->lock, flags); 1801 1802 if (bus_state->bus_suspended) 1803 usleep_range(5000, 10000); 1804 1805 return 0; 1806 } 1807 1808 /* 1809 * Workaround for missing Cold Attach Status (CAS) if device re-plugged in S3. 1810 * warm reset a USB3 device stuck in polling or compliance mode after resume. 1811 * See Intel 100/c230 series PCH specification update Doc #332692-006 Errata #8 1812 */ 1813 static bool xhci_port_missing_cas_quirk(struct xhci_port *port) 1814 { 1815 u32 portsc; 1816 1817 portsc = readl(port->addr); 1818 1819 /* if any of these are set we are not stuck */ 1820 if (portsc & (PORT_CONNECT | PORT_CAS)) 1821 return false; 1822 1823 if (((portsc & PORT_PLS_MASK) != XDEV_POLLING) && 1824 ((portsc & PORT_PLS_MASK) != XDEV_COMP_MODE)) 1825 return false; 1826 1827 /* clear wakeup/change bits, and do a warm port reset */ 1828 portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS); 1829 portsc |= PORT_WR; 1830 writel(portsc, port->addr); 1831 /* flush write */ 1832 readl(port->addr); 1833 return true; 1834 } 1835 1836 int xhci_bus_resume(struct usb_hcd *hcd) 1837 { 1838 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 1839 struct xhci_bus_state *bus_state; 1840 unsigned long flags; 1841 int max_ports, port_index; 1842 int slot_id; 1843 int sret; 1844 u32 next_state; 1845 u32 temp, portsc; 1846 struct xhci_hub *rhub; 1847 struct xhci_port **ports; 1848 1849 rhub = xhci_get_rhub(hcd); 1850 ports = rhub->ports; 1851 max_ports = rhub->num_ports; 1852 bus_state = &rhub->bus_state; 1853 1854 if (time_before(jiffies, bus_state->next_statechange)) 1855 msleep(5); 1856 1857 spin_lock_irqsave(&xhci->lock, flags); 1858 if (!HCD_HW_ACCESSIBLE(hcd)) { 1859 spin_unlock_irqrestore(&xhci->lock, flags); 1860 return -ESHUTDOWN; 1861 } 1862 1863 /* delay the irqs */ 1864 temp = readl(&xhci->op_regs->command); 1865 temp &= ~CMD_EIE; 1866 writel(temp, &xhci->op_regs->command); 1867 1868 /* bus specific resume for ports we suspended at bus_suspend */ 1869 if (hcd->speed >= HCD_USB3) 1870 next_state = XDEV_U0; 1871 else 1872 next_state = XDEV_RESUME; 1873 1874 port_index = max_ports; 1875 while (port_index--) { 1876 portsc = readl(ports[port_index]->addr); 1877 1878 /* warm reset CAS limited ports stuck in polling/compliance */ 1879 if ((xhci->quirks & XHCI_MISSING_CAS) && 1880 (hcd->speed >= HCD_USB3) && 1881 xhci_port_missing_cas_quirk(ports[port_index])) { 1882 xhci_dbg(xhci, "reset stuck port %d-%d\n", 1883 hcd->self.busnum, port_index + 1); 1884 clear_bit(port_index, &bus_state->bus_suspended); 1885 continue; 1886 } 1887 /* resume if we suspended the link, and it is still suspended */ 1888 if (test_bit(port_index, &bus_state->bus_suspended)) 1889 switch (portsc & PORT_PLS_MASK) { 1890 case XDEV_U3: 1891 portsc = xhci_port_state_to_neutral(portsc); 1892 portsc &= ~PORT_PLS_MASK; 1893 portsc |= PORT_LINK_STROBE | next_state; 1894 break; 1895 case XDEV_RESUME: 1896 /* resume already initiated */ 1897 break; 1898 default: 1899 /* not in a resumeable state, ignore it */ 1900 clear_bit(port_index, 1901 &bus_state->bus_suspended); 1902 break; 1903 } 1904 /* disable wake for all ports, write new link state if needed */ 1905 portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS); 1906 writel(portsc, ports[port_index]->addr); 1907 } 1908 1909 /* USB2 specific resume signaling delay and U0 link state transition */ 1910 if (hcd->speed < HCD_USB3) { 1911 if (bus_state->bus_suspended) { 1912 spin_unlock_irqrestore(&xhci->lock, flags); 1913 msleep(USB_RESUME_TIMEOUT); 1914 spin_lock_irqsave(&xhci->lock, flags); 1915 } 1916 for_each_set_bit(port_index, &bus_state->bus_suspended, 1917 BITS_PER_LONG) { 1918 /* Clear PLC to poll it later for U0 transition */ 1919 xhci_test_and_clear_bit(xhci, ports[port_index], 1920 PORT_PLC); 1921 xhci_set_link_state(xhci, ports[port_index], XDEV_U0); 1922 } 1923 } 1924 1925 /* poll for U0 link state complete, both USB2 and USB3 */ 1926 for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) { 1927 sret = xhci_handshake(ports[port_index]->addr, PORT_PLC, 1928 PORT_PLC, 10 * 1000); 1929 if (sret) { 1930 xhci_warn(xhci, "port %d-%d resume PLC timeout\n", 1931 hcd->self.busnum, port_index + 1); 1932 continue; 1933 } 1934 xhci_test_and_clear_bit(xhci, ports[port_index], PORT_PLC); 1935 slot_id = xhci_find_slot_id_by_port(hcd, xhci, port_index + 1); 1936 if (slot_id) 1937 xhci_ring_device(xhci, slot_id); 1938 } 1939 (void) readl(&xhci->op_regs->command); 1940 1941 bus_state->next_statechange = jiffies + msecs_to_jiffies(5); 1942 /* re-enable irqs */ 1943 temp = readl(&xhci->op_regs->command); 1944 temp |= CMD_EIE; 1945 writel(temp, &xhci->op_regs->command); 1946 temp = readl(&xhci->op_regs->command); 1947 1948 spin_unlock_irqrestore(&xhci->lock, flags); 1949 return 0; 1950 } 1951 1952 unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd) 1953 { 1954 struct xhci_hub *rhub = xhci_get_rhub(hcd); 1955 1956 /* USB3 port wakeups are reported via usb_wakeup_notification() */ 1957 return rhub->bus_state.resuming_ports; /* USB2 ports only */ 1958 } 1959 1960 #endif /* CONFIG_PM */ 1961