xhci-hub.c 20.8 KB
Newer Older
S
Sarah Sharp 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
/*
 * xHCI host controller driver
 *
 * Copyright (C) 2008 Intel Corp.
 *
 * Author: Sarah Sharp
 * Some code borrowed from the Linux EHCI driver.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <asm/unaligned.h>

#include "xhci.h"

27 28 29 30
#define	PORT_WAKE_BITS	(PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E)
#define	PORT_RWC_BITS	(PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \
			 PORT_RC | PORT_PLC | PORT_PE)

S
Sarah Sharp 已提交
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
static void xhci_hub_descriptor(struct xhci_hcd *xhci,
		struct usb_hub_descriptor *desc)
{
	int ports;
	u16 temp;

	ports = HCS_MAX_PORTS(xhci->hcs_params1);

	/* USB 3.0 hubs have a different descriptor, but we fake this for now */
	desc->bDescriptorType = 0x29;
	desc->bPwrOn2PwrGood = 10;	/* xhci section 5.4.9 says 20ms max */
	desc->bHubContrCurrent = 0;

	desc->bNbrPorts = ports;
	temp = 1 + (ports / 8);
	desc->bDescLength = 7 + 2 * temp;

J
John Youn 已提交
48 49
	memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
	memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
S
Sarah Sharp 已提交
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

	/* Ugh, these should be #defines, FIXME */
	/* Using table 11-13 in USB 2.0 spec. */
	temp = 0;
	/* Bits 1:0 - support port power switching, or power always on */
	if (HCC_PPC(xhci->hcc_params))
		temp |= 0x0001;
	else
		temp |= 0x0002;
	/* Bit  2 - root hubs are not part of a compound device */
	/* Bits 4:3 - individual port over current protection */
	temp |= 0x0008;
	/* Bits 6:5 - no TTs in root ports */
	/* Bit  7 - no port indicators */
	desc->wHubCharacteristics = (__force __u16) cpu_to_le16(temp);
}

static unsigned int xhci_port_speed(unsigned int port_status)
{
	if (DEV_LOWSPEED(port_status))
70
		return USB_PORT_STAT_LOW_SPEED;
S
Sarah Sharp 已提交
71
	if (DEV_HIGHSPEED(port_status))
72
		return USB_PORT_STAT_HIGH_SPEED;
S
Sarah Sharp 已提交
73
	if (DEV_SUPERSPEED(port_status))
74
		return USB_PORT_STAT_SUPER_SPEED;
S
Sarah Sharp 已提交
75 76 77
	/*
	 * FIXME: Yes, we should check for full speed, but the core uses that as
	 * a default in portspeed() in usb/core/hub.c (which is the only place
78
	 * USB_PORT_STAT_*_SPEED is used).
S
Sarah Sharp 已提交
79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128
	 */
	return 0;
}

/*
 * These bits are Read Only (RO) and should be saved and written to the
 * registers: 0, 3, 10:13, 30
 * connect status, over-current status, port speed, and device removable.
 * connect status and port speed are also sticky - meaning they're in
 * the AUX well and they aren't changed by a hot, warm, or cold reset.
 */
#define	XHCI_PORT_RO	((1<<0) | (1<<3) | (0xf<<10) | (1<<30))
/*
 * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
 * bits 5:8, 9, 14:15, 25:27
 * link state, port power, port indicator state, "wake on" enable state
 */
#define XHCI_PORT_RWS	((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25))
/*
 * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
 * bit 4 (port reset)
 */
#define	XHCI_PORT_RW1S	((1<<4))
/*
 * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
 * bits 1, 17, 18, 19, 20, 21, 22, 23
 * port enable/disable, and
 * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports),
 * over-current, reset, link state, and L1 change
 */
#define XHCI_PORT_RW1CS	((1<<1) | (0x7f<<17))
/*
 * Bit 16 is RW, and writing a '1' to it causes the link state control to be
 * latched in
 */
#define	XHCI_PORT_RW	((1<<16))
/*
 * These bits are Reserved Zero (RsvdZ) and zero should be written to them:
 * bits 2, 24, 28:31
 */
#define	XHCI_PORT_RZ	((1<<2) | (1<<24) | (0xf<<28))

/*
 * Given a port state, this function returns a value that would result in the
 * port being in the same state, if the value was written to the port status
 * control register.
 * Save Read Only (RO) bits and save read/write bits where
 * writing a 0 clears the bit and writing a 1 sets the bit (RWS).
 * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect.
 */
129
u32 xhci_port_state_to_neutral(u32 state)
S
Sarah Sharp 已提交
130 131 132 133 134
{
	/* Save read-only status and port state */
	return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS);
}

135 136 137
/*
 * find slot id based on port number.
 */
138
int xhci_find_slot_id_by_port(struct xhci_hcd *xhci, u16 port)
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215
{
	int slot_id;
	int i;

	slot_id = 0;
	for (i = 0; i < MAX_HC_SLOTS; i++) {
		if (!xhci->devs[i])
			continue;
		if (xhci->devs[i]->port == port) {
			slot_id = i;
			break;
		}
	}

	return slot_id;
}

/*
 * Stop device
 * It issues stop endpoint command for EP 0 to 30. And wait the last command
 * to complete.
 * suspend will set to 1, if suspend bit need to set in command.
 */
static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
{
	struct xhci_virt_device *virt_dev;
	struct xhci_command *cmd;
	unsigned long flags;
	int timeleft;
	int ret;
	int i;

	ret = 0;
	virt_dev = xhci->devs[slot_id];
	cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO);
	if (!cmd) {
		xhci_dbg(xhci, "Couldn't allocate command structure.\n");
		return -ENOMEM;
	}

	spin_lock_irqsave(&xhci->lock, flags);
	for (i = LAST_EP_INDEX; i > 0; i--) {
		if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue)
			xhci_queue_stop_endpoint(xhci, slot_id, i, suspend);
	}
	cmd->command_trb = xhci->cmd_ring->enqueue;
	list_add_tail(&cmd->cmd_list, &virt_dev->cmd_list);
	xhci_queue_stop_endpoint(xhci, slot_id, 0, suspend);
	xhci_ring_cmd_db(xhci);
	spin_unlock_irqrestore(&xhci->lock, flags);

	/* Wait for last stop endpoint command to finish */
	timeleft = wait_for_completion_interruptible_timeout(
			cmd->completion,
			USB_CTRL_SET_TIMEOUT);
	if (timeleft <= 0) {
		xhci_warn(xhci, "%s while waiting for stop endpoint command\n",
				timeleft == 0 ? "Timeout" : "Signal");
		spin_lock_irqsave(&xhci->lock, flags);
		/* The timeout might have raced with the event ring handler, so
		 * only delete from the list if the item isn't poisoned.
		 */
		if (cmd->cmd_list.next != LIST_POISON1)
			list_del(&cmd->cmd_list);
		spin_unlock_irqrestore(&xhci->lock, flags);
		ret = -ETIME;
		goto command_cleanup;
	}

command_cleanup:
	xhci_free_command(xhci, cmd);
	return ret;
}

/*
 * Ring device, it rings the all doorbells unconditionally.
 */
216
void xhci_ring_device(struct xhci_hcd *xhci, int slot_id)
217 218 219 220 221 222 223 224 225 226 227
{
	int i;

	for (i = 0; i < LAST_EP_INDEX + 1; i++)
		if (xhci->devs[slot_id]->eps[i].ring &&
		    xhci->devs[slot_id]->eps[i].ring->dequeue)
			xhci_ring_ep_doorbell(xhci, slot_id, i, 0);

	return;
}

228 229 230
static void xhci_disable_port(struct xhci_hcd *xhci, u16 wIndex,
		u32 __iomem *addr, u32 port_status)
{
231 232 233 234 235 236 237
	/* Don't allow the USB core to disable SuperSpeed ports. */
	if (xhci->port_array[wIndex] == 0x03) {
		xhci_dbg(xhci, "Ignoring request to disable "
				"SuperSpeed port.\n");
		return;
	}

238 239 240 241 242 243 244
	/* Write 1 to disable the port */
	xhci_writel(xhci, port_status | PORT_PE, addr);
	port_status = xhci_readl(xhci, addr);
	xhci_dbg(xhci, "disable port, actual port %d status  = 0x%x\n",
			wIndex, port_status);
}

245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263
static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
		u16 wIndex, u32 __iomem *addr, u32 port_status)
{
	char *port_change_bit;
	u32 status;

	switch (wValue) {
	case USB_PORT_FEAT_C_RESET:
		status = PORT_RC;
		port_change_bit = "reset";
		break;
	case USB_PORT_FEAT_C_CONNECTION:
		status = PORT_CSC;
		port_change_bit = "connect";
		break;
	case USB_PORT_FEAT_C_OVER_CURRENT:
		status = PORT_OCC;
		port_change_bit = "over-current";
		break;
264 265 266 267
	case USB_PORT_FEAT_C_ENABLE:
		status = PORT_PEC;
		port_change_bit = "enable/disable";
		break;
268 269 270 271
	case USB_PORT_FEAT_C_SUSPEND:
		status = PORT_PLC;
		port_change_bit = "suspend/resume";
		break;
272 273 274 275 276 277 278 279 280 281 282
	default:
		/* Should never happen */
		return;
	}
	/* Change bits are all write 1 to clear */
	xhci_writel(xhci, port_status | status, addr);
	port_status = xhci_readl(xhci, addr);
	xhci_dbg(xhci, "clear port %s change, actual port %d status  = 0x%x\n",
			port_change_bit, wIndex, port_status);
}

S
Sarah Sharp 已提交
283 284 285 286 287 288
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
		u16 wIndex, char *buf, u16 wLength)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int ports;
	unsigned long flags;
289
	u32 temp, temp1, status;
S
Sarah Sharp 已提交
290 291
	int retval = 0;
	u32 __iomem *addr;
292
	int slot_id;
S
Sarah Sharp 已提交
293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315

	ports = HCS_MAX_PORTS(xhci->hcs_params1);

	spin_lock_irqsave(&xhci->lock, flags);
	switch (typeReq) {
	case GetHubStatus:
		/* No power source, over-current reported per port */
		memset(buf, 0, 4);
		break;
	case GetHubDescriptor:
		xhci_hub_descriptor(xhci, (struct usb_hub_descriptor *) buf);
		break;
	case GetPortStatus:
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;
		status = 0;
		addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff);
		temp = xhci_readl(xhci, addr);
		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n", wIndex, temp);

		/* wPortChange bits */
		if (temp & PORT_CSC)
316
			status |= USB_PORT_STAT_C_CONNECTION << 16;
S
Sarah Sharp 已提交
317
		if (temp & PORT_PEC)
318
			status |= USB_PORT_STAT_C_ENABLE << 16;
S
Sarah Sharp 已提交
319
		if ((temp & PORT_OCC))
320
			status |= USB_PORT_STAT_C_OVERCURRENT << 16;
S
Sarah Sharp 已提交
321
		/*
322
		 * FIXME ignoring reset and USB 2.1/3.0 specific
S
Sarah Sharp 已提交
323 324
		 * changes
		 */
325 326 327
		if ((temp & PORT_PLS_MASK) == XDEV_U3
			&& (temp & PORT_POWER))
			status |= 1 << USB_PORT_FEAT_SUSPEND;
328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349
		if ((temp & PORT_PLS_MASK) == XDEV_RESUME) {
			if ((temp & PORT_RESET) || !(temp & PORT_PE))
				goto error;
			if (!DEV_SUPERSPEED(temp) && time_after_eq(jiffies,
						xhci->resume_done[wIndex])) {
				xhci_dbg(xhci, "Resume USB2 port %d\n",
					wIndex + 1);
				xhci->resume_done[wIndex] = 0;
				temp1 = xhci_port_state_to_neutral(temp);
				temp1 &= ~PORT_PLS_MASK;
				temp1 |= PORT_LINK_STROBE | XDEV_U0;
				xhci_writel(xhci, temp1, addr);

				xhci_dbg(xhci, "set port %d resume\n",
					wIndex + 1);
				slot_id = xhci_find_slot_id_by_port(xhci,
								 wIndex + 1);
				if (!slot_id) {
					xhci_dbg(xhci, "slot_id is zero\n");
					goto error;
				}
				xhci_ring_device(xhci, slot_id);
350 351
				xhci->port_c_suspend |= 1 << wIndex;
				xhci->suspended_ports &= ~(1 << wIndex);
352 353
			}
		}
354 355
		if ((temp & PORT_PLS_MASK) == XDEV_U0
			&& (temp & PORT_POWER)
356 357 358
			&& (xhci->suspended_ports & (1 << wIndex))) {
			xhci->suspended_ports &= ~(1 << wIndex);
			xhci->port_c_suspend |= 1 << wIndex;
359
		}
S
Sarah Sharp 已提交
360
		if (temp & PORT_CONNECT) {
361
			status |= USB_PORT_STAT_CONNECTION;
S
Sarah Sharp 已提交
362 363 364
			status |= xhci_port_speed(temp);
		}
		if (temp & PORT_PE)
365
			status |= USB_PORT_STAT_ENABLE;
S
Sarah Sharp 已提交
366
		if (temp & PORT_OC)
367
			status |= USB_PORT_STAT_OVERCURRENT;
S
Sarah Sharp 已提交
368
		if (temp & PORT_RESET)
369
			status |= USB_PORT_STAT_RESET;
S
Sarah Sharp 已提交
370
		if (temp & PORT_POWER)
371
			status |= USB_PORT_STAT_POWER;
372
		if (xhci->port_c_suspend & (1 << wIndex))
373
			status |= 1 << USB_PORT_FEAT_C_SUSPEND;
S
Sarah Sharp 已提交
374 375 376 377 378 379 380 381 382 383 384 385
		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
		break;
	case SetPortFeature:
		wIndex &= 0xff;
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;
		addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff);
		temp = xhci_readl(xhci, addr);
		temp = xhci_port_state_to_neutral(temp);
		switch (wValue) {
386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, addr);
			/* In spec software should not attempt to suspend
			 * a port unless the port reports that it is in the
			 * enabled (PED = ‘1’,PLS < ‘3’) state.
			 */
			if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
				|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
				xhci_warn(xhci, "USB core suspending device "
					  "not in U0/U1/U2.\n");
				goto error;
			}

			slot_id = xhci_find_slot_id_by_port(xhci, wIndex + 1);
			if (!slot_id) {
				xhci_warn(xhci, "slot_id is zero\n");
				goto error;
			}
			/* unlock to execute stop endpoint commands */
			spin_unlock_irqrestore(&xhci->lock, flags);
			xhci_stop_device(xhci, slot_id, 1);
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_port_state_to_neutral(temp);
			temp &= ~PORT_PLS_MASK;
			temp |= PORT_LINK_STROBE | XDEV_U3;
			xhci_writel(xhci, temp, addr);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(10); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, addr);
419
			xhci->suspended_ports |= 1 << wIndex;
420
			break;
S
Sarah Sharp 已提交
421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453
		case USB_PORT_FEAT_POWER:
			/*
			 * Turn on ports, even if there isn't per-port switching.
			 * HC will report connect events even before this is set.
			 * However, khubd will ignore the roothub events until
			 * the roothub is registered.
			 */
			xhci_writel(xhci, temp | PORT_POWER, addr);

			temp = xhci_readl(xhci, addr);
			xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n", wIndex, temp);
			break;
		case USB_PORT_FEAT_RESET:
			temp = (temp | PORT_RESET);
			xhci_writel(xhci, temp, addr);

			temp = xhci_readl(xhci, addr);
			xhci_dbg(xhci, "set port reset, actual port %d status  = 0x%x\n", wIndex, temp);
			break;
		default:
			goto error;
		}
		temp = xhci_readl(xhci, addr); /* unblock any posted writes */
		break;
	case ClearPortFeature:
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;
		addr = &xhci->op_regs->port_status_base +
			NUM_PORT_REGS*(wIndex & 0xff);
		temp = xhci_readl(xhci, addr);
		temp = xhci_port_state_to_neutral(temp);
		switch (wValue) {
454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, addr);
			xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
			xhci_dbg(xhci, "PORTSC %04x\n", temp);
			if (temp & PORT_RESET)
				goto error;
			if (temp & XDEV_U3) {
				if ((temp & PORT_PE) == 0)
					goto error;
				if (DEV_SUPERSPEED(temp)) {
					temp = xhci_port_state_to_neutral(temp);
					temp &= ~PORT_PLS_MASK;
					temp |= PORT_LINK_STROBE | XDEV_U0;
					xhci_writel(xhci, temp, addr);
					xhci_readl(xhci, addr);
				} else {
					temp = xhci_port_state_to_neutral(temp);
					temp &= ~PORT_PLS_MASK;
					temp |= PORT_LINK_STROBE | XDEV_RESUME;
					xhci_writel(xhci, temp, addr);

					spin_unlock_irqrestore(&xhci->lock,
							       flags);
					msleep(20);
					spin_lock_irqsave(&xhci->lock, flags);

					temp = xhci_readl(xhci, addr);
					temp = xhci_port_state_to_neutral(temp);
					temp &= ~PORT_PLS_MASK;
					temp |= PORT_LINK_STROBE | XDEV_U0;
					xhci_writel(xhci, temp, addr);
				}
486
				xhci->port_c_suspend |= 1 << wIndex;
487 488 489 490 491 492 493 494 495 496
			}

			slot_id = xhci_find_slot_id_by_port(xhci, wIndex + 1);
			if (!slot_id) {
				xhci_dbg(xhci, "slot_id is zero\n");
				goto error;
			}
			xhci_ring_device(xhci, slot_id);
			break;
		case USB_PORT_FEAT_C_SUSPEND:
497
			xhci->port_c_suspend &= ~(1 << wIndex);
S
Sarah Sharp 已提交
498 499 500
		case USB_PORT_FEAT_C_RESET:
		case USB_PORT_FEAT_C_CONNECTION:
		case USB_PORT_FEAT_C_OVER_CURRENT:
501
		case USB_PORT_FEAT_C_ENABLE:
502 503
			xhci_clear_port_change_bit(xhci, wValue, wIndex,
					addr, temp);
S
Sarah Sharp 已提交
504
			break;
505 506 507
		case USB_PORT_FEAT_ENABLE:
			xhci_disable_port(xhci, wIndex, addr, temp);
			break;
S
Sarah Sharp 已提交
508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532
		default:
			goto error;
		}
		break;
	default:
error:
		/* "stall" on error */
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&xhci->lock, flags);
	return retval;
}

/*
 * Returns 0 if the status hasn't changed, or the number of bytes in buf.
 * Ports are 0-indexed from the HCD point of view,
 * and 1-indexed from the USB core pointer of view.
 *
 * Note that the status change bits will be cleared as soon as a port status
 * change event is generated, so we use the saved status from that event.
 */
int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	unsigned long flags;
	u32 temp, status;
533
	u32 mask;
S
Sarah Sharp 已提交
534 535 536 537 538 539 540 541
	int i, retval;
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int ports;
	u32 __iomem *addr;

	ports = HCS_MAX_PORTS(xhci->hcs_params1);

	/* Initial status is no changes */
542 543
	retval = (ports + 8) / 8;
	memset(buf, 0, retval);
S
Sarah Sharp 已提交
544 545
	status = 0;

546 547
	mask = PORT_CSC | PORT_PEC | PORT_OCC;

S
Sarah Sharp 已提交
548 549 550 551 552 553
	spin_lock_irqsave(&xhci->lock, flags);
	/* For each port, did anything change?  If so, set that bit in buf. */
	for (i = 0; i < ports; i++) {
		addr = &xhci->op_regs->port_status_base +
			NUM_PORT_REGS*i;
		temp = xhci_readl(xhci, addr);
554
		if ((temp & mask) != 0 ||
555
			(xhci->port_c_suspend & 1 << i) ||
556 557
			(xhci->resume_done[i] && time_after_eq(
			    jiffies, xhci->resume_done[i]))) {
558
			buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
S
Sarah Sharp 已提交
559 560 561 562 563 564
			status = 1;
		}
	}
	spin_unlock_irqrestore(&xhci->lock, flags);
	return status ? retval : 0;
}
565 566 567 568 569 570

#ifdef CONFIG_PM

int xhci_bus_suspend(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
571
	int max_ports, port_index;
572 573 574
	unsigned long flags;

	xhci_dbg(xhci, "suspend root hub\n");
575
	max_ports = HCS_MAX_PORTS(xhci->hcs_params1);
576 577 578 579

	spin_lock_irqsave(&xhci->lock, flags);

	if (hcd->self.root_hub->do_remote_wakeup) {
580 581 582
		port_index = max_ports;
		while (port_index--) {
			if (xhci->resume_done[port_index] != 0) {
583 584 585
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_dbg(xhci, "suspend failed because "
						"port %d is resuming\n",
586
						port_index + 1);
587 588 589 590 591
				return -EBUSY;
			}
		}
	}

592
	port_index = max_ports;
593
	xhci->bus_suspended = 0;
594
	while (port_index--) {
595 596 597 598 599 600
		/* suspend the port if the port is not suspended */
		u32 __iomem *addr;
		u32 t1, t2;
		int slot_id;

		addr = &xhci->op_regs->port_status_base +
601
			NUM_PORT_REGS * (port_index & 0xff);
602 603 604 605
		t1 = xhci_readl(xhci, addr);
		t2 = xhci_port_state_to_neutral(t1);

		if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
606 607 608
			xhci_dbg(xhci, "port %d not suspended\n", port_index);
			slot_id = xhci_find_slot_id_by_port(xhci,
					port_index + 1);
609 610 611 612 613 614 615
			if (slot_id) {
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_stop_device(xhci, slot_id, 1);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			t2 &= ~PORT_PLS_MASK;
			t2 |= PORT_LINK_STROBE | XDEV_U3;
616
			set_bit(port_index, &xhci->bus_suspended);
617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
		}
		if (hcd->self.root_hub->do_remote_wakeup) {
			if (t1 & PORT_CONNECT) {
				t2 |= PORT_WKOC_E | PORT_WKDISC_E;
				t2 &= ~PORT_WKCONN_E;
			} else {
				t2 |= PORT_WKOC_E | PORT_WKCONN_E;
				t2 &= ~PORT_WKDISC_E;
			}
		} else
			t2 &= ~PORT_WAKE_BITS;

		t1 = xhci_port_state_to_neutral(t1);
		if (t1 != t2)
			xhci_writel(xhci, t2, addr);

		if (DEV_HIGHSPEED(t1)) {
			/* enable remote wake up for USB 2.0 */
			u32 __iomem *addr;
			u32 tmp;

			addr = &xhci->op_regs->port_power_base +
639
				NUM_PORT_REGS * (port_index & 0xff);
640 641 642 643 644 645 646 647 648 649 650 651 652 653
			tmp = xhci_readl(xhci, addr);
			tmp |= PORT_RWE;
			xhci_writel(xhci, tmp, addr);
		}
	}
	hcd->state = HC_STATE_SUSPENDED;
	xhci->next_statechange = jiffies + msecs_to_jiffies(10);
	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}

int xhci_bus_resume(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
654
	int max_ports, port_index;
655 656 657 658
	u32 temp;
	unsigned long flags;

	xhci_dbg(xhci, "resume root hub\n");
659
	max_ports = HCS_MAX_PORTS(xhci->hcs_params1);
660 661 662 663 664 665 666 667 668 669 670 671 672 673 674

	if (time_before(jiffies, xhci->next_statechange))
		msleep(5);

	spin_lock_irqsave(&xhci->lock, flags);
	if (!HCD_HW_ACCESSIBLE(hcd)) {
		spin_unlock_irqrestore(&xhci->lock, flags);
		return -ESHUTDOWN;
	}

	/* delay the irqs */
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp &= ~CMD_EIE;
	xhci_writel(xhci, temp, &xhci->op_regs->command);

675 676
	port_index = max_ports;
	while (port_index--) {
677 678 679 680 681 682 683
		/* Check whether need resume ports. If needed
		   resume port and disable remote wakeup */
		u32 __iomem *addr;
		u32 temp;
		int slot_id;

		addr = &xhci->op_regs->port_status_base +
684
			NUM_PORT_REGS * (port_index & 0xff);
685 686 687 688 689
		temp = xhci_readl(xhci, addr);
		if (DEV_SUPERSPEED(temp))
			temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
		else
			temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
690
		if (test_bit(port_index, &xhci->bus_suspended) &&
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712
		    (temp & PORT_PLS_MASK)) {
			if (DEV_SUPERSPEED(temp)) {
				temp = xhci_port_state_to_neutral(temp);
				temp &= ~PORT_PLS_MASK;
				temp |= PORT_LINK_STROBE | XDEV_U0;
				xhci_writel(xhci, temp, addr);
			} else {
				temp = xhci_port_state_to_neutral(temp);
				temp &= ~PORT_PLS_MASK;
				temp |= PORT_LINK_STROBE | XDEV_RESUME;
				xhci_writel(xhci, temp, addr);

				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(20);
				spin_lock_irqsave(&xhci->lock, flags);

				temp = xhci_readl(xhci, addr);
				temp = xhci_port_state_to_neutral(temp);
				temp &= ~PORT_PLS_MASK;
				temp |= PORT_LINK_STROBE | XDEV_U0;
				xhci_writel(xhci, temp, addr);
			}
713
			slot_id = xhci_find_slot_id_by_port(xhci, port_index + 1);
714 715 716 717 718 719 720 721 722 723 724
			if (slot_id)
				xhci_ring_device(xhci, slot_id);
		} else
			xhci_writel(xhci, temp, addr);

		if (DEV_HIGHSPEED(temp)) {
			/* disable remote wake up for USB 2.0 */
			u32 __iomem *addr;
			u32 tmp;

			addr = &xhci->op_regs->port_power_base +
725
				NUM_PORT_REGS * (port_index & 0xff);
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744
			tmp = xhci_readl(xhci, addr);
			tmp &= ~PORT_RWE;
			xhci_writel(xhci, tmp, addr);
		}
	}

	(void) xhci_readl(xhci, &xhci->op_regs->command);

	xhci->next_statechange = jiffies + msecs_to_jiffies(5);
	/* re-enable irqs */
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp |= CMD_EIE;
	xhci_writel(xhci, temp, &xhci->op_regs->command);
	temp = xhci_readl(xhci, &xhci->op_regs->command);

	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}

745
#endif	/* CONFIG_PM */