2 * xHCI host controller driver
4 * Copyright (C) 2008 Intel Corp.
7 * Some code borrowed from the Linux EHCI driver.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/gfp.h>
24 #include <asm/unaligned.h>
28 #define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E)
29 #define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \
30 PORT_RC | PORT_PLC | PORT_PE)
32 /* usb 1.1 root hub device descriptor */
33 static u8 usb_bos_descriptor [] = {
34 USB_DT_BOS_SIZE, /* __u8 bLength, 5 bytes */
35 USB_DT_BOS, /* __u8 bDescriptorType */
36 0x0F, 0x00, /* __le16 wTotalLength, 15 bytes */
37 0x1, /* __u8 bNumDeviceCaps */
38 /* First device capability */
39 USB_DT_USB_SS_CAP_SIZE, /* __u8 bLength, 10 bytes */
40 USB_DT_DEVICE_CAPABILITY, /* Device Capability */
41 USB_SS_CAP_TYPE, /* bDevCapabilityType, SUPERSPEED_USB */
42 0x00, /* bmAttributes, LTM off by default */
43 USB_5GBPS_OPERATION, 0x00, /* wSpeedsSupported, 5Gbps only */
44 0x03, /* bFunctionalitySupport,
46 0x00, /* bU1DevExitLat, set later. */
47 0x00, 0x00 /* __le16 bU2DevExitLat, set later. */
51 static void xhci_common_hub_descriptor(struct xhci_hcd *xhci,
52 struct usb_hub_descriptor *desc, int ports)
56 desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */
57 desc->bHubContrCurrent = 0;
59 desc->bNbrPorts = ports;
61 /* Bits 1:0 - support per-port power switching, or power always on */
62 if (HCC_PPC(xhci->hcc_params))
63 temp |= HUB_CHAR_INDV_PORT_LPSM;
65 temp |= HUB_CHAR_NO_LPSM;
66 /* Bit 2 - root hubs are not part of a compound device */
67 /* Bits 4:3 - individual port over current protection */
68 temp |= HUB_CHAR_INDV_PORT_OCPM;
69 /* Bits 6:5 - no TTs in root ports */
70 /* Bit 7 - no port indicators */
71 desc->wHubCharacteristics = cpu_to_le16(temp);
74 /* Fill in the USB 2.0 roothub descriptor */
75 static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
76 struct usb_hub_descriptor *desc)
80 __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8];
84 ports = xhci->num_usb2_ports;
86 xhci_common_hub_descriptor(xhci, desc, ports);
87 desc->bDescriptorType = USB_DT_HUB;
88 temp = 1 + (ports / 8);
89 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
91 /* The Device Removable bits are reported on a byte granularity.
92 * If the port doesn't exist within that byte, the bit is set to 0.
94 memset(port_removable, 0, sizeof(port_removable));
95 for (i = 0; i < ports; i++) {
96 portsc = xhci_readl(xhci, xhci->usb2_ports[i]);
97 /* If a device is removable, PORTSC reports a 0, same as in the
98 * hub descriptor DeviceRemovable bits.
100 if (portsc & PORT_DEV_REMOVE)
101 /* This math is hairy because bit 0 of DeviceRemovable
102 * is reserved, and bit 1 is for port 1, etc.
104 port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8);
107 /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN
108 * ports on it. The USB 2.0 specification says that there are two
109 * variable length fields at the end of the hub descriptor:
110 * DeviceRemovable and PortPwrCtrlMask. But since we can have less than
111 * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array
112 * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to
113 * 0xFF, so we initialize the both arrays (DeviceRemovable and
114 * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each
115 * set of ports that actually exist.
117 memset(desc->u.hs.DeviceRemovable, 0xff,
118 sizeof(desc->u.hs.DeviceRemovable));
119 memset(desc->u.hs.PortPwrCtrlMask, 0xff,
120 sizeof(desc->u.hs.PortPwrCtrlMask));
122 for (i = 0; i < (ports + 1 + 7) / 8; i++)
123 memset(&desc->u.hs.DeviceRemovable[i], port_removable[i],
127 /* Fill in the USB 3.0 roothub descriptor */
128 static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
129 struct usb_hub_descriptor *desc)
136 ports = xhci->num_usb3_ports;
137 xhci_common_hub_descriptor(xhci, desc, ports);
138 desc->bDescriptorType = USB_DT_SS_HUB;
139 desc->bDescLength = USB_DT_SS_HUB_SIZE;
141 /* header decode latency should be zero for roothubs,
142 * see section 4.23.5.2.
144 desc->u.ss.bHubHdrDecLat = 0;
145 desc->u.ss.wHubDelay = 0;
148 /* bit 0 is reserved, bit 1 is for port 1, etc. */
149 for (i = 0; i < ports; i++) {
150 portsc = xhci_readl(xhci, xhci->usb3_ports[i]);
151 if (portsc & PORT_DEV_REMOVE)
152 port_removable |= 1 << (i + 1);
154 memset(&desc->u.ss.DeviceRemovable,
155 (__force __u16) cpu_to_le16(port_removable),
159 static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
160 struct usb_hub_descriptor *desc)
163 if (hcd->speed == HCD_USB3)
164 xhci_usb3_hub_descriptor(hcd, xhci, desc);
166 xhci_usb2_hub_descriptor(hcd, xhci, desc);
170 static unsigned int xhci_port_speed(unsigned int port_status)
172 if (DEV_LOWSPEED(port_status))
173 return USB_PORT_STAT_LOW_SPEED;
174 if (DEV_HIGHSPEED(port_status))
175 return USB_PORT_STAT_HIGH_SPEED;
177 * FIXME: Yes, we should check for full speed, but the core uses that as
178 * a default in portspeed() in usb/core/hub.c (which is the only place
179 * USB_PORT_STAT_*_SPEED is used).
185 * These bits are Read Only (RO) and should be saved and written to the
186 * registers: 0, 3, 10:13, 30
187 * connect status, over-current status, port speed, and device removable.
188 * connect status and port speed are also sticky - meaning they're in
189 * the AUX well and they aren't changed by a hot, warm, or cold reset.
191 #define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30))
193 * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
194 * bits 5:8, 9, 14:15, 25:27
195 * link state, port power, port indicator state, "wake on" enable state
197 #define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25))
199 * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
202 #define XHCI_PORT_RW1S ((1<<4))
204 * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
205 * bits 1, 17, 18, 19, 20, 21, 22, 23
206 * port enable/disable, and
207 * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports),
208 * over-current, reset, link state, and L1 change
210 #define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17))
212 * Bit 16 is RW, and writing a '1' to it causes the link state control to be
215 #define XHCI_PORT_RW ((1<<16))
217 * These bits are Reserved Zero (RsvdZ) and zero should be written to them:
220 #define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28))
223 * Given a port state, this function returns a value that would result in the
224 * port being in the same state, if the value was written to the port status
226 * Save Read Only (RO) bits and save read/write bits where
227 * writing a 0 clears the bit and writing a 1 sets the bit (RWS).
228 * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect.
230 u32 xhci_port_state_to_neutral(u32 state)
232 /* Save read-only status and port state */
233 return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS);
237 * find slot id based on port number.
238 * @port: The one-based port number from one of the two split roothubs.
240 int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
245 enum usb_device_speed speed;
248 for (i = 0; i < MAX_HC_SLOTS; i++) {
251 speed = xhci->devs[i]->udev->speed;
252 if (((speed == USB_SPEED_SUPER) == (hcd->speed == HCD_USB3))
253 && xhci->devs[i]->fake_port == port) {
264 * It issues stop endpoint command for EP 0 to 30. And wait the last command
266 * suspend will set to 1, if suspend bit need to set in command.
268 static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
270 struct xhci_virt_device *virt_dev;
271 struct xhci_command *cmd;
278 virt_dev = xhci->devs[slot_id];
279 cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO);
281 xhci_dbg(xhci, "Couldn't allocate command structure.\n");
285 spin_lock_irqsave(&xhci->lock, flags);
286 for (i = LAST_EP_INDEX; i > 0; i--) {
287 if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue)
288 xhci_queue_stop_endpoint(xhci, slot_id, i, suspend);
290 cmd->command_trb = xhci->cmd_ring->enqueue;
291 list_add_tail(&cmd->cmd_list, &virt_dev->cmd_list);
292 xhci_queue_stop_endpoint(xhci, slot_id, 0, suspend);
293 xhci_ring_cmd_db(xhci);
294 spin_unlock_irqrestore(&xhci->lock, flags);
296 /* Wait for last stop endpoint command to finish */
297 timeleft = wait_for_completion_interruptible_timeout(
299 USB_CTRL_SET_TIMEOUT);
301 xhci_warn(xhci, "%s while waiting for stop endpoint command\n",
302 timeleft == 0 ? "Timeout" : "Signal");
303 spin_lock_irqsave(&xhci->lock, flags);
304 /* The timeout might have raced with the event ring handler, so
305 * only delete from the list if the item isn't poisoned.
307 if (cmd->cmd_list.next != LIST_POISON1)
308 list_del(&cmd->cmd_list);
309 spin_unlock_irqrestore(&xhci->lock, flags);
311 goto command_cleanup;
315 xhci_free_command(xhci, cmd);
320 * Ring device, it rings the all doorbells unconditionally.
322 void xhci_ring_device(struct xhci_hcd *xhci, int slot_id)
326 for (i = 0; i < LAST_EP_INDEX + 1; i++)
327 if (xhci->devs[slot_id]->eps[i].ring &&
328 xhci->devs[slot_id]->eps[i].ring->dequeue)
329 xhci_ring_ep_doorbell(xhci, slot_id, i, 0);
334 static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
335 u16 wIndex, __le32 __iomem *addr, u32 port_status)
337 /* Don't allow the USB core to disable SuperSpeed ports. */
338 if (hcd->speed == HCD_USB3) {
339 xhci_dbg(xhci, "Ignoring request to disable "
340 "SuperSpeed port.\n");
344 /* Write 1 to disable the port */
345 xhci_writel(xhci, port_status | PORT_PE, addr);
346 port_status = xhci_readl(xhci, addr);
347 xhci_dbg(xhci, "disable port, actual port %d status = 0x%x\n",
348 wIndex, port_status);
351 static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
352 u16 wIndex, __le32 __iomem *addr, u32 port_status)
354 char *port_change_bit;
358 case USB_PORT_FEAT_C_RESET:
360 port_change_bit = "reset";
362 case USB_PORT_FEAT_C_BH_PORT_RESET:
364 port_change_bit = "warm(BH) reset";
366 case USB_PORT_FEAT_C_CONNECTION:
368 port_change_bit = "connect";
370 case USB_PORT_FEAT_C_OVER_CURRENT:
372 port_change_bit = "over-current";
374 case USB_PORT_FEAT_C_ENABLE:
376 port_change_bit = "enable/disable";
378 case USB_PORT_FEAT_C_SUSPEND:
380 port_change_bit = "suspend/resume";
382 case USB_PORT_FEAT_C_PORT_LINK_STATE:
384 port_change_bit = "link state";
387 /* Should never happen */
390 /* Change bits are all write 1 to clear */
391 xhci_writel(xhci, port_status | status, addr);
392 port_status = xhci_readl(xhci, addr);
393 xhci_dbg(xhci, "clear port %s change, actual port %d status = 0x%x\n",
394 port_change_bit, wIndex, port_status);
397 static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array)
400 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
402 if (hcd->speed == HCD_USB3) {
403 max_ports = xhci->num_usb3_ports;
404 *port_array = xhci->usb3_ports;
406 max_ports = xhci->num_usb2_ports;
407 *port_array = xhci->usb2_ports;
413 void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,
414 int port_id, u32 link_state)
418 temp = xhci_readl(xhci, port_array[port_id]);
419 temp = xhci_port_state_to_neutral(temp);
420 temp &= ~PORT_PLS_MASK;
421 temp |= PORT_LINK_STROBE | link_state;
422 xhci_writel(xhci, temp, port_array[port_id]);
425 void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
426 __le32 __iomem **port_array, int port_id, u16 wake_mask)
430 temp = xhci_readl(xhci, port_array[port_id]);
431 temp = xhci_port_state_to_neutral(temp);
433 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT)
434 temp |= PORT_WKCONN_E;
436 temp &= ~PORT_WKCONN_E;
438 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT)
439 temp |= PORT_WKDISC_E;
441 temp &= ~PORT_WKDISC_E;
443 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT)
446 temp &= ~PORT_WKOC_E;
448 xhci_writel(xhci, temp, port_array[port_id]);
451 /* Test and clear port RWC bit */
452 void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array,
453 int port_id, u32 port_bit)
457 temp = xhci_readl(xhci, port_array[port_id]);
458 if (temp & port_bit) {
459 temp = xhci_port_state_to_neutral(temp);
461 xhci_writel(xhci, temp, port_array[port_id]);
465 int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
466 u16 wIndex, char *buf, u16 wLength)
468 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
473 __le32 __iomem **port_array;
475 struct xhci_bus_state *bus_state;
480 max_ports = xhci_get_ports(hcd, &port_array);
481 bus_state = &xhci->bus_state[hcd_index(hcd)];
483 spin_lock_irqsave(&xhci->lock, flags);
486 /* No power source, over-current reported per port */
489 case GetHubDescriptor:
490 /* Check to make sure userspace is asking for the USB 3.0 hub
491 * descriptor for the USB 3.0 roothub. If not, we stall the
492 * endpoint, like external hubs do.
494 if (hcd->speed == HCD_USB3 &&
495 (wLength < USB_DT_SS_HUB_SIZE ||
496 wValue != (USB_DT_SS_HUB << 8))) {
497 xhci_dbg(xhci, "Wrong hub descriptor type for "
498 "USB 3.0 roothub.\n");
501 xhci_hub_descriptor(hcd, xhci,
502 (struct usb_hub_descriptor *) buf);
504 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
505 if ((wValue & 0xff00) != (USB_DT_BOS << 8))
508 if (hcd->speed != HCD_USB3)
511 memcpy(buf, &usb_bos_descriptor,
512 USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE);
513 temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
514 buf[12] = HCS_U1_LATENCY(temp);
515 put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);
517 spin_unlock_irqrestore(&xhci->lock, flags);
518 return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
520 if (!wIndex || wIndex > max_ports)
524 temp = xhci_readl(xhci, port_array[wIndex]);
525 if (temp == 0xffffffff) {
529 xhci_dbg(xhci, "get port status, actual port %d status = 0x%x\n", wIndex, temp);
531 /* wPortChange bits */
533 status |= USB_PORT_STAT_C_CONNECTION << 16;
535 status |= USB_PORT_STAT_C_ENABLE << 16;
536 if ((temp & PORT_OCC))
537 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
538 if ((temp & PORT_RC))
539 status |= USB_PORT_STAT_C_RESET << 16;
541 if (hcd->speed == HCD_USB3) {
542 if ((temp & PORT_PLC))
543 status |= USB_PORT_STAT_C_LINK_STATE << 16;
544 if ((temp & PORT_WRC))
545 status |= USB_PORT_STAT_C_BH_RESET << 16;
548 if (hcd->speed != HCD_USB3) {
549 if ((temp & PORT_PLS_MASK) == XDEV_U3
550 && (temp & PORT_POWER))
551 status |= USB_PORT_STAT_SUSPEND;
553 if ((temp & PORT_PLS_MASK) == XDEV_RESUME &&
554 !DEV_SUPERSPEED(temp)) {
555 if ((temp & PORT_RESET) || !(temp & PORT_PE))
557 if (time_after_eq(jiffies,
558 bus_state->resume_done[wIndex])) {
559 xhci_dbg(xhci, "Resume USB2 port %d\n",
561 bus_state->resume_done[wIndex] = 0;
562 clear_bit(wIndex, &bus_state->resuming_ports);
563 xhci_set_link_state(xhci, port_array, wIndex,
565 xhci_dbg(xhci, "set port %d resume\n",
567 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
570 xhci_dbg(xhci, "slot_id is zero\n");
573 xhci_ring_device(xhci, slot_id);
574 bus_state->port_c_suspend |= 1 << wIndex;
575 bus_state->suspended_ports &= ~(1 << wIndex);
578 * The resume has been signaling for less than
579 * 20ms. Report the port status as SUSPEND,
580 * let the usbcore check port status again
581 * and clear resume signaling later.
583 status |= USB_PORT_STAT_SUSPEND;
586 if ((temp & PORT_PLS_MASK) == XDEV_U0
587 && (temp & PORT_POWER)
588 && (bus_state->suspended_ports & (1 << wIndex))) {
589 bus_state->suspended_ports &= ~(1 << wIndex);
590 if (hcd->speed != HCD_USB3)
591 bus_state->port_c_suspend |= 1 << wIndex;
593 if (temp & PORT_CONNECT) {
594 status |= USB_PORT_STAT_CONNECTION;
595 status |= xhci_port_speed(temp);
598 status |= USB_PORT_STAT_ENABLE;
600 status |= USB_PORT_STAT_OVERCURRENT;
601 if (temp & PORT_RESET)
602 status |= USB_PORT_STAT_RESET;
603 if (temp & PORT_POWER) {
604 if (hcd->speed == HCD_USB3)
605 status |= USB_SS_PORT_STAT_POWER;
607 status |= USB_PORT_STAT_POWER;
609 /* Port Link State */
610 if (hcd->speed == HCD_USB3) {
611 /* resume state is a xHCI internal state.
612 * Do not report it to usb core.
614 if ((temp & PORT_PLS_MASK) != XDEV_RESUME)
615 status |= (temp & PORT_PLS_MASK);
617 if (bus_state->port_c_suspend & (1 << wIndex))
618 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
619 xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
620 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
623 if (wValue == USB_PORT_FEAT_LINK_STATE)
624 link_state = (wIndex & 0xff00) >> 3;
625 if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
626 wake_mask = wIndex & 0xff00;
627 /* The MSB of wIndex is the U1/U2 timeout */
628 timeout = (wIndex & 0xff00) >> 8;
630 if (!wIndex || wIndex > max_ports)
633 temp = xhci_readl(xhci, port_array[wIndex]);
634 if (temp == 0xffffffff) {
638 temp = xhci_port_state_to_neutral(temp);
639 /* FIXME: What new port features do we need to support? */
641 case USB_PORT_FEAT_SUSPEND:
642 temp = xhci_readl(xhci, port_array[wIndex]);
643 if ((temp & PORT_PLS_MASK) != XDEV_U0) {
644 /* Resume the port to U0 first */
645 xhci_set_link_state(xhci, port_array, wIndex,
647 spin_unlock_irqrestore(&xhci->lock, flags);
649 spin_lock_irqsave(&xhci->lock, flags);
651 /* In spec software should not attempt to suspend
652 * a port unless the port reports that it is in the
653 * enabled (PED = ‘1’,PLS < ‘3’) state.
655 temp = xhci_readl(xhci, port_array[wIndex]);
656 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
657 || (temp & PORT_PLS_MASK) >= XDEV_U3) {
658 xhci_warn(xhci, "USB core suspending device "
659 "not in U0/U1/U2.\n");
663 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
666 xhci_warn(xhci, "slot_id is zero\n");
669 /* unlock to execute stop endpoint commands */
670 spin_unlock_irqrestore(&xhci->lock, flags);
671 xhci_stop_device(xhci, slot_id, 1);
672 spin_lock_irqsave(&xhci->lock, flags);
674 xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);
676 spin_unlock_irqrestore(&xhci->lock, flags);
677 msleep(10); /* wait device to enter */
678 spin_lock_irqsave(&xhci->lock, flags);
680 temp = xhci_readl(xhci, port_array[wIndex]);
681 bus_state->suspended_ports |= 1 << wIndex;
683 case USB_PORT_FEAT_LINK_STATE:
684 temp = xhci_readl(xhci, port_array[wIndex]);
685 /* Software should not attempt to set
686 * port link state above '5' (Rx.Detect) and the port
689 if ((temp & PORT_PE) == 0 ||
690 (link_state > USB_SS_PORT_LS_RX_DETECT)) {
691 xhci_warn(xhci, "Cannot set link state.\n");
695 if (link_state == USB_SS_PORT_LS_U3) {
696 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
699 /* unlock to execute stop endpoint
701 spin_unlock_irqrestore(&xhci->lock,
703 xhci_stop_device(xhci, slot_id, 1);
704 spin_lock_irqsave(&xhci->lock, flags);
708 xhci_set_link_state(xhci, port_array, wIndex,
711 spin_unlock_irqrestore(&xhci->lock, flags);
712 msleep(20); /* wait device to enter */
713 spin_lock_irqsave(&xhci->lock, flags);
715 temp = xhci_readl(xhci, port_array[wIndex]);
716 if (link_state == USB_SS_PORT_LS_U3)
717 bus_state->suspended_ports |= 1 << wIndex;
719 case USB_PORT_FEAT_POWER:
721 * Turn on ports, even if there isn't per-port switching.
722 * HC will report connect events even before this is set.
723 * However, khubd will ignore the roothub events until
724 * the roothub is registered.
726 xhci_writel(xhci, temp | PORT_POWER,
729 temp = xhci_readl(xhci, port_array[wIndex]);
730 xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", wIndex, temp);
732 case USB_PORT_FEAT_RESET:
733 temp = (temp | PORT_RESET);
734 xhci_writel(xhci, temp, port_array[wIndex]);
736 temp = xhci_readl(xhci, port_array[wIndex]);
737 xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp);
739 case USB_PORT_FEAT_REMOTE_WAKE_MASK:
740 xhci_set_remote_wake_mask(xhci, port_array,
742 temp = xhci_readl(xhci, port_array[wIndex]);
743 xhci_dbg(xhci, "set port remote wake mask, "
744 "actual port %d status = 0x%x\n",
747 case USB_PORT_FEAT_BH_PORT_RESET:
749 xhci_writel(xhci, temp, port_array[wIndex]);
751 temp = xhci_readl(xhci, port_array[wIndex]);
753 case USB_PORT_FEAT_U1_TIMEOUT:
754 if (hcd->speed != HCD_USB3)
756 temp = xhci_readl(xhci, port_array[wIndex] + 1);
757 temp &= ~PORT_U1_TIMEOUT_MASK;
758 temp |= PORT_U1_TIMEOUT(timeout);
759 xhci_writel(xhci, temp, port_array[wIndex] + 1);
761 case USB_PORT_FEAT_U2_TIMEOUT:
762 if (hcd->speed != HCD_USB3)
764 temp = xhci_readl(xhci, port_array[wIndex] + 1);
765 temp &= ~PORT_U2_TIMEOUT_MASK;
766 temp |= PORT_U2_TIMEOUT(timeout);
767 xhci_writel(xhci, temp, port_array[wIndex] + 1);
772 /* unblock any posted writes */
773 temp = xhci_readl(xhci, port_array[wIndex]);
775 case ClearPortFeature:
776 if (!wIndex || wIndex > max_ports)
779 temp = xhci_readl(xhci, port_array[wIndex]);
780 if (temp == 0xffffffff) {
784 /* FIXME: What new port features do we need to support? */
785 temp = xhci_port_state_to_neutral(temp);
787 case USB_PORT_FEAT_SUSPEND:
788 temp = xhci_readl(xhci, port_array[wIndex]);
789 xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
790 xhci_dbg(xhci, "PORTSC %04x\n", temp);
791 if (temp & PORT_RESET)
793 if ((temp & PORT_PLS_MASK) == XDEV_U3) {
794 if ((temp & PORT_PE) == 0)
797 xhci_set_link_state(xhci, port_array, wIndex,
799 spin_unlock_irqrestore(&xhci->lock, flags);
801 spin_lock_irqsave(&xhci->lock, flags);
802 xhci_set_link_state(xhci, port_array, wIndex,
805 bus_state->port_c_suspend |= 1 << wIndex;
807 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
810 xhci_dbg(xhci, "slot_id is zero\n");
813 xhci_ring_device(xhci, slot_id);
815 case USB_PORT_FEAT_C_SUSPEND:
816 bus_state->port_c_suspend &= ~(1 << wIndex);
817 case USB_PORT_FEAT_C_RESET:
818 case USB_PORT_FEAT_C_BH_PORT_RESET:
819 case USB_PORT_FEAT_C_CONNECTION:
820 case USB_PORT_FEAT_C_OVER_CURRENT:
821 case USB_PORT_FEAT_C_ENABLE:
822 case USB_PORT_FEAT_C_PORT_LINK_STATE:
823 xhci_clear_port_change_bit(xhci, wValue, wIndex,
824 port_array[wIndex], temp);
826 case USB_PORT_FEAT_ENABLE:
827 xhci_disable_port(hcd, xhci, wIndex,
828 port_array[wIndex], temp);
836 /* "stall" on error */
839 spin_unlock_irqrestore(&xhci->lock, flags);
844 * Returns 0 if the status hasn't changed, or the number of bytes in buf.
845 * Ports are 0-indexed from the HCD point of view,
846 * and 1-indexed from the USB core pointer of view.
848 * Note that the status change bits will be cleared as soon as a port status
849 * change event is generated, so we use the saved status from that event.
851 int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
857 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
859 __le32 __iomem **port_array;
860 struct xhci_bus_state *bus_state;
862 max_ports = xhci_get_ports(hcd, &port_array);
863 bus_state = &xhci->bus_state[hcd_index(hcd)];
865 /* Initial status is no changes */
866 retval = (max_ports + 8) / 8;
867 memset(buf, 0, retval);
870 * Inform the usbcore about resume-in-progress by returning
871 * a non-zero value even if there are no status changes.
873 status = bus_state->resuming_ports;
875 mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC;
877 spin_lock_irqsave(&xhci->lock, flags);
878 /* For each port, did anything change? If so, set that bit in buf. */
879 for (i = 0; i < max_ports; i++) {
880 temp = xhci_readl(xhci, port_array[i]);
881 if (temp == 0xffffffff) {
885 if ((temp & mask) != 0 ||
886 (bus_state->port_c_suspend & 1 << i) ||
887 (bus_state->resume_done[i] && time_after_eq(
888 jiffies, bus_state->resume_done[i]))) {
889 buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
893 spin_unlock_irqrestore(&xhci->lock, flags);
894 return status ? retval : 0;
899 int xhci_bus_suspend(struct usb_hcd *hcd)
901 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
902 int max_ports, port_index;
903 __le32 __iomem **port_array;
904 struct xhci_bus_state *bus_state;
907 max_ports = xhci_get_ports(hcd, &port_array);
908 bus_state = &xhci->bus_state[hcd_index(hcd)];
910 spin_lock_irqsave(&xhci->lock, flags);
912 if (hcd->self.root_hub->do_remote_wakeup) {
913 if (bus_state->resuming_ports) {
914 spin_unlock_irqrestore(&xhci->lock, flags);
915 xhci_dbg(xhci, "suspend failed because "
916 "a port is resuming\n");
921 port_index = max_ports;
922 bus_state->bus_suspended = 0;
923 while (port_index--) {
924 /* suspend the port if the port is not suspended */
928 t1 = xhci_readl(xhci, port_array[port_index]);
929 t2 = xhci_port_state_to_neutral(t1);
931 if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
932 xhci_dbg(xhci, "port %d not suspended\n", port_index);
933 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
936 spin_unlock_irqrestore(&xhci->lock, flags);
937 xhci_stop_device(xhci, slot_id, 1);
938 spin_lock_irqsave(&xhci->lock, flags);
940 t2 &= ~PORT_PLS_MASK;
941 t2 |= PORT_LINK_STROBE | XDEV_U3;
942 set_bit(port_index, &bus_state->bus_suspended);
944 /* USB core sets remote wake mask for USB 3.0 hubs,
945 * including the USB 3.0 roothub, but only if CONFIG_USB_SUSPEND
946 * is enabled, so also enable remote wake here.
948 if (hcd->self.root_hub->do_remote_wakeup) {
949 if (t1 & PORT_CONNECT) {
950 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
951 t2 &= ~PORT_WKCONN_E;
953 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
954 t2 &= ~PORT_WKDISC_E;
957 t2 &= ~PORT_WAKE_BITS;
959 t1 = xhci_port_state_to_neutral(t1);
961 xhci_writel(xhci, t2, port_array[port_index]);
963 if (hcd->speed != HCD_USB3) {
964 /* enable remote wake up for USB 2.0 */
965 __le32 __iomem *addr;
968 /* Add one to the port status register address to get
969 * the port power control register address.
971 addr = port_array[port_index] + 1;
972 tmp = xhci_readl(xhci, addr);
974 xhci_writel(xhci, tmp, addr);
977 hcd->state = HC_STATE_SUSPENDED;
978 bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
979 spin_unlock_irqrestore(&xhci->lock, flags);
983 int xhci_bus_resume(struct usb_hcd *hcd)
985 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
986 int max_ports, port_index;
987 __le32 __iomem **port_array;
988 struct xhci_bus_state *bus_state;
992 max_ports = xhci_get_ports(hcd, &port_array);
993 bus_state = &xhci->bus_state[hcd_index(hcd)];
995 if (time_before(jiffies, bus_state->next_statechange))
998 spin_lock_irqsave(&xhci->lock, flags);
999 if (!HCD_HW_ACCESSIBLE(hcd)) {
1000 spin_unlock_irqrestore(&xhci->lock, flags);
1004 /* delay the irqs */
1005 temp = xhci_readl(xhci, &xhci->op_regs->command);
1007 xhci_writel(xhci, temp, &xhci->op_regs->command);
1009 port_index = max_ports;
1010 while (port_index--) {
1011 /* Check whether need resume ports. If needed
1012 resume port and disable remote wakeup */
1016 temp = xhci_readl(xhci, port_array[port_index]);
1017 if (DEV_SUPERSPEED(temp))
1018 temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
1020 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
1021 if (test_bit(port_index, &bus_state->bus_suspended) &&
1022 (temp & PORT_PLS_MASK)) {
1023 if (DEV_SUPERSPEED(temp)) {
1024 xhci_set_link_state(xhci, port_array,
1025 port_index, XDEV_U0);
1027 xhci_set_link_state(xhci, port_array,
1028 port_index, XDEV_RESUME);
1030 spin_unlock_irqrestore(&xhci->lock, flags);
1032 spin_lock_irqsave(&xhci->lock, flags);
1034 xhci_set_link_state(xhci, port_array,
1035 port_index, XDEV_U0);
1037 /* wait for the port to enter U0 and report port link
1040 spin_unlock_irqrestore(&xhci->lock, flags);
1042 spin_lock_irqsave(&xhci->lock, flags);
1045 xhci_test_and_clear_bit(xhci, port_array, port_index,
1048 slot_id = xhci_find_slot_id_by_port(hcd,
1049 xhci, port_index + 1);
1051 xhci_ring_device(xhci, slot_id);
1053 xhci_writel(xhci, temp, port_array[port_index]);
1055 if (hcd->speed != HCD_USB3) {
1056 /* disable remote wake up for USB 2.0 */
1057 __le32 __iomem *addr;
1060 /* Add one to the port status register address to get
1061 * the port power control register address.
1063 addr = port_array[port_index] + 1;
1064 tmp = xhci_readl(xhci, addr);
1066 xhci_writel(xhci, tmp, addr);
1070 (void) xhci_readl(xhci, &xhci->op_regs->command);
1072 bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
1073 /* re-enable irqs */
1074 temp = xhci_readl(xhci, &xhci->op_regs->command);
1076 xhci_writel(xhci, temp, &xhci->op_regs->command);
1077 temp = xhci_readl(xhci, &xhci->op_regs->command);
1079 spin_unlock_irqrestore(&xhci->lock, flags);
1083 #endif /* CONFIG_PM */