1 // SPDX-License-Identifier: GPL-2.0
3 * xHCI host controller driver
5 * Copyright (C) 2008 Intel Corp.
8 * Some code borrowed from the Linux EHCI driver.
12 #include <linux/slab.h>
13 #include <asm/unaligned.h>
14 #include <linux/bitfield.h>
17 #include "xhci-trace.h"
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)
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 */
35 static int xhci_create_usb3x_bos_desc(struct xhci_hcd *xhci, char *buf,
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;
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;
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;
65 if (i == 0 || bcdUSB < rev) {
67 port_cap = &xhci->port_caps[i];
71 if (bcdUSB >= 0x0310) {
72 if (port_cap->psi_count) {
75 for (i = 0; i < port_cap->psi_count; i++) {
76 if ((port_cap->psi[i] & PLT_MASK) == PLT_SYM)
80 ssac = port_cap->psi_count + num_sym_ssa - 1;
81 ssic = port_cap->psi_uid_count - 1;
88 ssic = (ssac + 1) / 2 - 1;
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));
97 if (wLength < USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE)
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 */
111 reg = readl(&xhci->cap_regs->hcc_params);
113 ss_cap->bmAttributes |= USB_LTM_SUPPORT;
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));
121 if (wLength < le16_to_cpu(bos->wTotalLength))
125 return le16_to_cpu(bos->wTotalLength);
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));
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]);
148 for (i = 0; i < port_cap->psi_count; i++) {
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;
167 lane_mantissa = psim;
169 /* Shift to Gbps and set SSP Link Protocol if 10Gpbs */
170 for (; psie < USB_SSP_SUBLINK_SPEED_LSE_GBPS; psie++)
173 if (!min_rate || psim < min_rate) {
178 /* Some host controllers don't set the link protocol for SSP */
180 lp = USB_SSP_SUBLINK_SPEED_LP_SSP;
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
190 if (bcdUSB == 0x0320 && plt == PLT_SYM) {
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.
199 if (ssid == 6 && psie == 3 && psim == 10 && i) {
200 u32 prev = port_cap->psi[i - 1];
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;
211 if (psie == 3 && psim > 10) {
212 lse = USB_SSP_SUBLINK_SPEED_LSE_GBPS;
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));
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);
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);
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);
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);
246 ssp_cap->wFunctionalitySupport =
247 cpu_to_le16(FIELD_PREP(USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID,
249 FIELD_PREP(USB_SSP_MIN_RX_LANE_COUNT, 1) |
250 FIELD_PREP(USB_SSP_MIN_TX_LANE_COUNT, 1));
252 return le16_to_cpu(bos->wTotalLength);
255 static void xhci_common_hub_descriptor(struct xhci_hcd *xhci,
256 struct usb_hub_descriptor *desc, int ports)
260 desc->bHubContrCurrent = 0;
262 desc->bNbrPorts = ports;
264 /* Bits 1:0 - support per-port power switching, or power always on */
265 if (HCC_PPC(xhci->hcc_params))
266 temp |= HUB_CHAR_INDV_PORT_LPSM;
268 temp |= HUB_CHAR_NO_LPSM;
269 /* Bit 2 - root hubs are not part of a compound device */
270 /* Bits 4:3 - individual port over current protection */
271 temp |= HUB_CHAR_INDV_PORT_OCPM;
272 /* Bits 6:5 - no TTs in root ports */
273 /* Bit 7 - no port indicators */
274 desc->wHubCharacteristics = cpu_to_le16(temp);
277 /* Fill in the USB 2.0 roothub descriptor */
278 static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
279 struct usb_hub_descriptor *desc)
283 __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8];
286 struct xhci_hub *rhub;
288 rhub = &xhci->usb2_rhub;
289 ports = rhub->num_ports;
290 xhci_common_hub_descriptor(xhci, desc, ports);
291 desc->bDescriptorType = USB_DT_HUB;
292 temp = 1 + (ports / 8);
293 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
294 desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.8 says 20ms */
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.
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.
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.
309 port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8);
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.
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));
327 for (i = 0; i < (ports + 1 + 7) / 8; i++)
328 memset(&desc->u.hs.DeviceRemovable[i], port_removable[i],
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)
340 struct xhci_hub *rhub;
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 desc->bPwrOn2PwrGood = 50; /* usb 3.1 may fail if less than 100ms */
349 /* header decode latency should be zero for roothubs,
350 * see section 4.23.5.2.
352 desc->u.ss.bHubHdrDecLat = 0;
353 desc->u.ss.wHubDelay = 0;
356 /* bit 0 is reserved, bit 1 is for port 1, etc. */
357 for (i = 0; i < ports; i++) {
358 portsc = readl(rhub->ports[i]->addr);
359 if (portsc & PORT_DEV_REMOVE)
360 port_removable |= 1 << (i + 1);
363 desc->u.ss.DeviceRemovable = cpu_to_le16(port_removable);
366 static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
367 struct usb_hub_descriptor *desc)
370 if (hcd->speed >= HCD_USB3)
371 xhci_usb3_hub_descriptor(hcd, xhci, desc);
373 xhci_usb2_hub_descriptor(hcd, xhci, desc);
377 static unsigned int xhci_port_speed(unsigned int port_status)
379 if (DEV_LOWSPEED(port_status))
380 return USB_PORT_STAT_LOW_SPEED;
381 if (DEV_HIGHSPEED(port_status))
382 return USB_PORT_STAT_HIGH_SPEED;
384 * FIXME: Yes, we should check for full speed, but the core uses that as
385 * a default in portspeed() in usb/core/hub.c (which is the only place
386 * USB_PORT_STAT_*_SPEED is used).
392 * These bits are Read Only (RO) and should be saved and written to the
393 * registers: 0, 3, 10:13, 30
394 * connect status, over-current status, port speed, and device removable.
395 * connect status and port speed are also sticky - meaning they're in
396 * the AUX well and they aren't changed by a hot, warm, or cold reset.
398 #define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30))
400 * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
401 * bits 5:8, 9, 14:15, 25:27
402 * link state, port power, port indicator state, "wake on" enable state
404 #define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25))
406 * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
409 #define XHCI_PORT_RW1S ((1<<4))
411 * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
412 * bits 1, 17, 18, 19, 20, 21, 22, 23
413 * port enable/disable, and
414 * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports),
415 * over-current, reset, link state, and L1 change
417 #define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17))
419 * Bit 16 is RW, and writing a '1' to it causes the link state control to be
422 #define XHCI_PORT_RW ((1<<16))
424 * These bits are Reserved Zero (RsvdZ) and zero should be written to them:
427 #define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28))
430 * xhci_port_state_to_neutral() - Clean up read portsc value back into writeable
431 * @state: u32 port value read from portsc register to be cleanup up
433 * Given a port state, this function returns a value that would result in the
434 * port being in the same state, if the value was written to the port status
436 * Save Read Only (RO) bits and save read/write bits where
437 * writing a 0 clears the bit and writing a 1 sets the bit (RWS).
438 * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect.
440 * Return: u32 value that can be written back to portsc register without
441 * changing port state.
444 u32 xhci_port_state_to_neutral(u32 state)
446 /* Save read-only status and port state */
447 return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS);
449 EXPORT_SYMBOL_GPL(xhci_port_state_to_neutral);
452 * xhci_find_slot_id_by_port() - Find slot id of a usb device on a roothub port
453 * @hcd: pointer to hcd of the roothub
454 * @xhci: pointer to xhci structure
455 * @port: one-based port number of the port in this roothub.
457 * Return: Slot id of the usb device connected to the root port, 0 if not found
460 int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
465 enum usb_device_speed speed;
468 for (i = 0; i < MAX_HC_SLOTS; i++) {
469 if (!xhci->devs[i] || !xhci->devs[i]->udev)
471 speed = xhci->devs[i]->udev->speed;
472 if (((speed >= USB_SPEED_SUPER) == (hcd->speed >= HCD_USB3))
473 && xhci->devs[i]->fake_port == port) {
481 EXPORT_SYMBOL_GPL(xhci_find_slot_id_by_port);
485 * It issues stop endpoint command for EP 0 to 30. And wait the last command
487 * suspend will set to 1, if suspend bit need to set in command.
489 static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
491 struct xhci_virt_device *virt_dev;
492 struct xhci_command *cmd;
498 virt_dev = xhci->devs[slot_id];
502 trace_xhci_stop_device(virt_dev);
504 cmd = xhci_alloc_command(xhci, true, GFP_NOIO);
508 spin_lock_irqsave(&xhci->lock, flags);
509 for (i = LAST_EP_INDEX; i > 0; i--) {
510 if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) {
511 struct xhci_ep_ctx *ep_ctx;
512 struct xhci_command *command;
514 ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->out_ctx, i);
516 /* Check ep is running, required by AMD SNPS 3.1 xHC */
517 if (GET_EP_CTX_STATE(ep_ctx) != EP_STATE_RUNNING)
520 command = xhci_alloc_command(xhci, false, GFP_NOWAIT);
522 spin_unlock_irqrestore(&xhci->lock, flags);
527 ret = xhci_queue_stop_endpoint(xhci, command, slot_id,
530 spin_unlock_irqrestore(&xhci->lock, flags);
531 xhci_free_command(xhci, command);
536 ret = xhci_queue_stop_endpoint(xhci, cmd, slot_id, 0, suspend);
538 spin_unlock_irqrestore(&xhci->lock, flags);
542 xhci_ring_cmd_db(xhci);
543 spin_unlock_irqrestore(&xhci->lock, flags);
545 /* Wait for last stop endpoint command to finish */
546 wait_for_completion(cmd->completion);
548 if (cmd->status == COMP_COMMAND_ABORTED ||
549 cmd->status == COMP_COMMAND_RING_STOPPED) {
550 xhci_warn(xhci, "Timeout while waiting for stop endpoint command\n");
555 xhci_free_command(xhci, cmd);
560 * Ring device, it rings the all doorbells unconditionally.
562 void xhci_ring_device(struct xhci_hcd *xhci, int slot_id)
565 struct xhci_virt_ep *ep;
567 for (i = 0; i < LAST_EP_INDEX + 1; i++) {
568 ep = &xhci->devs[slot_id]->eps[i];
570 if (ep->ep_state & EP_HAS_STREAMS) {
571 for (s = 1; s < ep->stream_info->num_streams; s++)
572 xhci_ring_ep_doorbell(xhci, slot_id, i, s);
573 } else if (ep->ring && ep->ring->dequeue) {
574 xhci_ring_ep_doorbell(xhci, slot_id, i, 0);
581 static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
582 u16 wIndex, __le32 __iomem *addr, u32 port_status)
584 /* Don't allow the USB core to disable SuperSpeed ports. */
585 if (hcd->speed >= HCD_USB3) {
586 xhci_dbg(xhci, "Ignoring request to disable "
587 "SuperSpeed port.\n");
591 if (xhci->quirks & XHCI_BROKEN_PORT_PED) {
593 "Broken Port Enabled/Disabled, ignoring port disable request.\n");
597 /* Write 1 to disable the port */
598 writel(port_status | PORT_PE, addr);
599 port_status = readl(addr);
600 xhci_dbg(xhci, "disable port %d-%d, portsc: 0x%x\n",
601 hcd->self.busnum, wIndex + 1, port_status);
604 static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
605 u16 wIndex, __le32 __iomem *addr, u32 port_status)
607 char *port_change_bit;
611 case USB_PORT_FEAT_C_RESET:
613 port_change_bit = "reset";
615 case USB_PORT_FEAT_C_BH_PORT_RESET:
617 port_change_bit = "warm(BH) reset";
619 case USB_PORT_FEAT_C_CONNECTION:
621 port_change_bit = "connect";
623 case USB_PORT_FEAT_C_OVER_CURRENT:
625 port_change_bit = "over-current";
627 case USB_PORT_FEAT_C_ENABLE:
629 port_change_bit = "enable/disable";
631 case USB_PORT_FEAT_C_SUSPEND:
633 port_change_bit = "suspend/resume";
635 case USB_PORT_FEAT_C_PORT_LINK_STATE:
637 port_change_bit = "link state";
639 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
641 port_change_bit = "config error";
644 /* Should never happen */
647 /* Change bits are all write 1 to clear */
648 writel(port_status | status, addr);
649 port_status = readl(addr);
651 xhci_dbg(xhci, "clear port%d %s change, portsc: 0x%x\n",
652 wIndex + 1, port_change_bit, port_status);
655 struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd)
657 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
659 if (hcd->speed >= HCD_USB3)
660 return &xhci->usb3_rhub;
661 return &xhci->usb2_rhub;
665 * xhci_set_port_power() must be called with xhci->lock held.
666 * It will release and re-aquire the lock while calling ACPI
669 static void xhci_set_port_power(struct xhci_hcd *xhci, struct xhci_port *port,
670 bool on, unsigned long *flags)
671 __must_hold(&xhci->lock)
676 hcd = port->rhub->hcd;
677 temp = readl(port->addr);
679 xhci_dbg(xhci, "set port power %d-%d %s, portsc: 0x%x\n",
680 hcd->self.busnum, port->hcd_portnum + 1, on ? "ON" : "OFF", temp);
682 temp = xhci_port_state_to_neutral(temp);
686 writel(temp | PORT_POWER, port->addr);
690 writel(temp & ~PORT_POWER, port->addr);
693 spin_unlock_irqrestore(&xhci->lock, *flags);
694 temp = usb_acpi_power_manageable(hcd->self.root_hub,
697 usb_acpi_set_power_state(hcd->self.root_hub,
698 port->hcd_portnum, on);
699 spin_lock_irqsave(&xhci->lock, *flags);
702 static void xhci_port_set_test_mode(struct xhci_hcd *xhci,
703 u16 test_mode, u16 wIndex)
706 struct xhci_port *port;
708 /* xhci only supports test mode for usb2 ports */
709 port = xhci->usb2_rhub.ports[wIndex];
710 temp = readl(port->addr + PORTPMSC);
711 temp |= test_mode << PORT_TEST_MODE_SHIFT;
712 writel(temp, port->addr + PORTPMSC);
713 xhci->test_mode = test_mode;
714 if (test_mode == USB_TEST_FORCE_ENABLE)
718 static int xhci_enter_test_mode(struct xhci_hcd *xhci,
719 u16 test_mode, u16 wIndex, unsigned long *flags)
720 __must_hold(&xhci->lock)
724 /* Disable all Device Slots */
725 xhci_dbg(xhci, "Disable all slots\n");
726 spin_unlock_irqrestore(&xhci->lock, *flags);
727 for (i = 1; i <= HCS_MAX_SLOTS(xhci->hcs_params1); i++) {
731 retval = xhci_disable_slot(xhci, i);
732 xhci_free_virt_device(xhci, i);
734 xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n",
737 spin_lock_irqsave(&xhci->lock, *flags);
738 /* Put all ports to the Disable state by clear PP */
739 xhci_dbg(xhci, "Disable all port (PP = 0)\n");
740 /* Power off USB3 ports*/
741 for (i = 0; i < xhci->usb3_rhub.num_ports; i++)
742 xhci_set_port_power(xhci, xhci->usb3_rhub.ports[i], false, flags);
743 /* Power off USB2 ports*/
744 for (i = 0; i < xhci->usb2_rhub.num_ports; i++)
745 xhci_set_port_power(xhci, xhci->usb2_rhub.ports[i], false, flags);
746 /* Stop the controller */
747 xhci_dbg(xhci, "Stop controller\n");
748 retval = xhci_halt(xhci);
751 /* Disable runtime PM for test mode */
752 pm_runtime_forbid(xhci_to_hcd(xhci)->self.controller);
753 /* Set PORTPMSC.PTC field to enter selected test mode */
754 /* Port is selected by wIndex. port_id = wIndex + 1 */
755 xhci_dbg(xhci, "Enter Test Mode: %d, Port_id=%d\n",
756 test_mode, wIndex + 1);
757 xhci_port_set_test_mode(xhci, test_mode, wIndex);
761 static int xhci_exit_test_mode(struct xhci_hcd *xhci)
765 if (!xhci->test_mode) {
766 xhci_err(xhci, "Not in test mode, do nothing.\n");
769 if (xhci->test_mode == USB_TEST_FORCE_ENABLE &&
770 !(xhci->xhc_state & XHCI_STATE_HALTED)) {
771 retval = xhci_halt(xhci);
775 pm_runtime_allow(xhci_to_hcd(xhci)->self.controller);
777 return xhci_reset(xhci, XHCI_RESET_SHORT_USEC);
780 void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
786 portsc = readl(port->addr);
787 temp = xhci_port_state_to_neutral(portsc);
788 temp &= ~PORT_PLS_MASK;
789 temp |= PORT_LINK_STROBE | link_state;
790 writel(temp, port->addr);
792 xhci_dbg(xhci, "Set port %d-%d link state, portsc: 0x%x, write 0x%x",
793 port->rhub->hcd->self.busnum, port->hcd_portnum + 1,
797 static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
798 struct xhci_port *port, u16 wake_mask)
802 temp = readl(port->addr);
803 temp = xhci_port_state_to_neutral(temp);
805 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT)
806 temp |= PORT_WKCONN_E;
808 temp &= ~PORT_WKCONN_E;
810 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT)
811 temp |= PORT_WKDISC_E;
813 temp &= ~PORT_WKDISC_E;
815 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT)
818 temp &= ~PORT_WKOC_E;
820 writel(temp, port->addr);
823 /* Test and clear port RWC bit */
824 void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port,
829 temp = readl(port->addr);
830 if (temp & port_bit) {
831 temp = xhci_port_state_to_neutral(temp);
833 writel(temp, port->addr);
837 /* Updates Link Status for super Speed port */
838 static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci,
839 u32 *status, u32 status_reg)
841 u32 pls = status_reg & PORT_PLS_MASK;
843 /* When the CAS bit is set then warm reset
844 * should be performed on port
846 if (status_reg & PORT_CAS) {
847 /* The CAS bit can be set while the port is
849 * Only roothubs have CAS bit, so we
850 * pretend to be in compliance mode
851 * unless we're already in compliance
852 * or the inactive state.
854 if (pls != USB_SS_PORT_LS_COMP_MOD &&
855 pls != USB_SS_PORT_LS_SS_INACTIVE) {
856 pls = USB_SS_PORT_LS_COMP_MOD;
858 /* Return also connection bit -
859 * hub state machine resets port
860 * when this bit is set.
862 pls |= USB_PORT_STAT_CONNECTION;
865 * Resume state is an xHCI internal state. Do not report it to
866 * usb core, instead, pretend to be U3, thus usb core knows
867 * it's not ready for transfer.
869 if (pls == XDEV_RESUME) {
870 *status |= USB_SS_PORT_LS_U3;
875 * If CAS bit isn't set but the Port is already at
876 * Compliance Mode, fake a connection so the USB core
877 * notices the Compliance state and resets the port.
878 * This resolves an issue generated by the SN65LVPE502CP
879 * in which sometimes the port enters compliance mode
880 * caused by a delay on the host-device negotiation.
882 if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
883 (pls == USB_SS_PORT_LS_COMP_MOD))
884 pls |= USB_PORT_STAT_CONNECTION;
887 /* update status field */
892 * Function for Compliance Mode Quirk.
894 * This Function verifies if all xhc USB3 ports have entered U0, if so,
895 * the compliance mode timer is deleted. A port won't enter
896 * compliance mode if it has previously entered U0.
898 static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status,
901 u32 all_ports_seen_u0 = ((1 << xhci->usb3_rhub.num_ports) - 1);
902 bool port_in_u0 = ((status & PORT_PLS_MASK) == XDEV_U0);
904 if (!(xhci->quirks & XHCI_COMP_MODE_QUIRK))
907 if ((xhci->port_status_u0 != all_ports_seen_u0) && port_in_u0) {
908 xhci->port_status_u0 |= 1 << wIndex;
909 if (xhci->port_status_u0 == all_ports_seen_u0) {
910 del_timer_sync(&xhci->comp_mode_recovery_timer);
911 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
912 "All USB3 ports have entered U0 already!");
913 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
914 "Compliance Mode Recovery Timer Deleted.");
919 static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
920 u32 *status, u32 portsc,
921 unsigned long *flags)
923 struct xhci_bus_state *bus_state;
924 struct xhci_hcd *xhci;
929 hcd = port->rhub->hcd;
930 bus_state = &port->rhub->bus_state;
931 xhci = hcd_to_xhci(hcd);
932 wIndex = port->hcd_portnum;
934 if ((portsc & PORT_RESET) || !(portsc & PORT_PE)) {
935 *status = 0xffffffff;
938 /* did port event handler already start resume timing? */
939 if (!port->resume_done) {
940 /* If not, maybe we are in a host initated resume? */
941 if (test_bit(wIndex, &bus_state->resuming_ports)) {
942 /* Host initated resume doesn't time the resume
943 * signalling using resume_done[].
944 * It manually sets RESUME state, sleeps 20ms
945 * and sets U0 state. This should probably be
946 * changed, but not right now.
949 /* port resume was discovered now and here,
950 * start resume timing
952 unsigned long timeout = jiffies +
953 msecs_to_jiffies(USB_RESUME_TIMEOUT);
955 set_bit(wIndex, &bus_state->resuming_ports);
956 port->resume_done = timeout;
957 mod_timer(&hcd->rh_timer, timeout);
958 usb_hcd_start_port_resume(&hcd->self, wIndex);
960 /* Has resume been signalled for USB_RESUME_TIME yet? */
961 } else if (time_after_eq(jiffies, port->resume_done)) {
964 xhci_dbg(xhci, "resume USB2 port %d-%d\n",
965 hcd->self.busnum, wIndex + 1);
967 port->resume_done = 0;
968 clear_bit(wIndex, &bus_state->resuming_ports);
969 port->rexit_active = true;
971 xhci_test_and_clear_bit(xhci, port, PORT_PLC);
972 xhci_set_link_state(xhci, port, XDEV_U0);
974 spin_unlock_irqrestore(&xhci->lock, *flags);
975 time_left = wait_for_completion_timeout(
977 msecs_to_jiffies(XHCI_MAX_REXIT_TIMEOUT_MS));
978 spin_lock_irqsave(&xhci->lock, *flags);
981 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
984 xhci_dbg(xhci, "slot_id is zero\n");
985 *status = 0xffffffff;
988 xhci_ring_device(xhci, slot_id);
990 int port_status = readl(port->addr);
992 xhci_warn(xhci, "Port resume timed out, port %d-%d: 0x%x\n",
993 hcd->self.busnum, wIndex + 1, port_status);
994 *status |= USB_PORT_STAT_SUSPEND;
995 port->rexit_active = false;
998 usb_hcd_end_port_resume(&hcd->self, wIndex);
999 bus_state->port_c_suspend |= 1 << wIndex;
1000 bus_state->suspended_ports &= ~(1 << wIndex);
1003 * The resume has been signaling for less than
1004 * USB_RESUME_TIME. Report the port status as SUSPEND,
1005 * let the usbcore check port status again and clear
1006 * resume signaling later.
1008 *status |= USB_PORT_STAT_SUSPEND;
1013 static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li)
1018 /* only support rx and tx lane counts of 1 in usb3.1 spec */
1019 speed_id = DEV_PORT_SPEED(raw_port_status);
1020 ext_stat |= speed_id; /* bits 3:0, RX speed id */
1021 ext_stat |= speed_id << 4; /* bits 7:4, TX speed id */
1023 ext_stat |= PORT_RX_LANES(port_li) << 8; /* bits 11:8 Rx lane count */
1024 ext_stat |= PORT_TX_LANES(port_li) << 12; /* bits 15:12 Tx lane count */
1029 static void xhci_get_usb3_port_status(struct xhci_port *port, u32 *status,
1032 struct xhci_bus_state *bus_state;
1033 struct xhci_hcd *xhci;
1034 struct usb_hcd *hcd;
1038 bus_state = &port->rhub->bus_state;
1039 xhci = hcd_to_xhci(port->rhub->hcd);
1040 hcd = port->rhub->hcd;
1041 link_state = portsc & PORT_PLS_MASK;
1042 portnum = port->hcd_portnum;
1044 /* USB3 specific wPortChange bits
1046 * Port link change with port in resume state should not be
1047 * reported to usbcore, as this is an internal state to be
1048 * handled by xhci driver. Reporting PLC to usbcore may
1049 * cause usbcore clearing PLC first and port change event
1050 * irq won't be generated.
1053 if (portsc & PORT_PLC && (link_state != XDEV_RESUME))
1054 *status |= USB_PORT_STAT_C_LINK_STATE << 16;
1055 if (portsc & PORT_WRC)
1056 *status |= USB_PORT_STAT_C_BH_RESET << 16;
1057 if (portsc & PORT_CEC)
1058 *status |= USB_PORT_STAT_C_CONFIG_ERROR << 16;
1060 /* USB3 specific wPortStatus bits */
1061 if (portsc & PORT_POWER) {
1062 *status |= USB_SS_PORT_STAT_POWER;
1063 /* link state handling */
1064 if (link_state == XDEV_U0)
1065 bus_state->suspended_ports &= ~(1 << portnum);
1068 /* remote wake resume signaling complete */
1069 if (bus_state->port_remote_wakeup & (1 << portnum) &&
1070 link_state != XDEV_RESUME &&
1071 link_state != XDEV_RECOVERY) {
1072 bus_state->port_remote_wakeup &= ~(1 << portnum);
1073 usb_hcd_end_port_resume(&hcd->self, portnum);
1076 xhci_hub_report_usb3_link_state(xhci, status, portsc);
1077 xhci_del_comp_mod_timer(xhci, portsc, portnum);
1080 static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status,
1081 u32 portsc, unsigned long *flags)
1083 struct xhci_bus_state *bus_state;
1088 bus_state = &port->rhub->bus_state;
1089 link_state = portsc & PORT_PLS_MASK;
1090 portnum = port->hcd_portnum;
1092 /* USB2 wPortStatus bits */
1093 if (portsc & PORT_POWER) {
1094 *status |= USB_PORT_STAT_POWER;
1096 /* link state is only valid if port is powered */
1097 if (link_state == XDEV_U3)
1098 *status |= USB_PORT_STAT_SUSPEND;
1099 if (link_state == XDEV_U2)
1100 *status |= USB_PORT_STAT_L1;
1101 if (link_state == XDEV_U0) {
1102 if (port->resume_done)
1103 usb_hcd_end_port_resume(&port->rhub->hcd->self,
1105 port->resume_done = 0;
1106 clear_bit(portnum, &bus_state->resuming_ports);
1107 if (bus_state->suspended_ports & (1 << portnum)) {
1108 bus_state->suspended_ports &= ~(1 << portnum);
1109 bus_state->port_c_suspend |= 1 << portnum;
1112 if (link_state == XDEV_RESUME) {
1113 ret = xhci_handle_usb2_port_link_resume(port, status,
1122 * Converts a raw xHCI port status into the format that external USB 2.0 or USB
1125 * Possible side effects:
1126 * - Mark a port as being done with device resume,
1127 * and ring the endpoint doorbells.
1128 * - Stop the Synopsys redriver Compliance Mode polling.
1129 * - Drop and reacquire the xHCI lock, in order to wait for port resume.
1131 static u32 xhci_get_port_status(struct usb_hcd *hcd,
1132 struct xhci_bus_state *bus_state,
1133 u16 wIndex, u32 raw_port_status,
1134 unsigned long *flags)
1135 __releases(&xhci->lock)
1136 __acquires(&xhci->lock)
1139 struct xhci_hub *rhub;
1140 struct xhci_port *port;
1142 rhub = xhci_get_rhub(hcd);
1143 port = rhub->ports[wIndex];
1145 /* common wPortChange bits */
1146 if (raw_port_status & PORT_CSC)
1147 status |= USB_PORT_STAT_C_CONNECTION << 16;
1148 if (raw_port_status & PORT_PEC)
1149 status |= USB_PORT_STAT_C_ENABLE << 16;
1150 if ((raw_port_status & PORT_OCC))
1151 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1152 if ((raw_port_status & PORT_RC))
1153 status |= USB_PORT_STAT_C_RESET << 16;
1155 /* common wPortStatus bits */
1156 if (raw_port_status & PORT_CONNECT) {
1157 status |= USB_PORT_STAT_CONNECTION;
1158 status |= xhci_port_speed(raw_port_status);
1160 if (raw_port_status & PORT_PE)
1161 status |= USB_PORT_STAT_ENABLE;
1162 if (raw_port_status & PORT_OC)
1163 status |= USB_PORT_STAT_OVERCURRENT;
1164 if (raw_port_status & PORT_RESET)
1165 status |= USB_PORT_STAT_RESET;
1167 /* USB2 and USB3 specific bits, including Port Link State */
1168 if (hcd->speed >= HCD_USB3)
1169 xhci_get_usb3_port_status(port, &status, raw_port_status);
1171 xhci_get_usb2_port_status(port, &status, raw_port_status,
1174 * Clear stale usb2 resume signalling variables in case port changed
1175 * state during resume signalling. For example on error
1177 if ((port->resume_done ||
1178 test_bit(wIndex, &bus_state->resuming_ports)) &&
1179 (raw_port_status & PORT_PLS_MASK) != XDEV_U3 &&
1180 (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) {
1181 port->resume_done = 0;
1182 clear_bit(wIndex, &bus_state->resuming_ports);
1183 usb_hcd_end_port_resume(&hcd->self, wIndex);
1186 if (bus_state->port_c_suspend & (1 << wIndex))
1187 status |= USB_PORT_STAT_C_SUSPEND << 16;
1192 int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1193 u16 wIndex, char *buf, u16 wLength)
1195 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1197 unsigned long flags;
1201 struct xhci_bus_state *bus_state;
1206 struct xhci_hub *rhub;
1207 struct xhci_port **ports;
1208 struct xhci_port *port;
1211 rhub = xhci_get_rhub(hcd);
1212 ports = rhub->ports;
1213 max_ports = rhub->num_ports;
1214 bus_state = &rhub->bus_state;
1215 portnum1 = wIndex & 0xff;
1217 spin_lock_irqsave(&xhci->lock, flags);
1220 /* No power source, over-current reported per port */
1223 case GetHubDescriptor:
1224 /* Check to make sure userspace is asking for the USB 3.0 hub
1225 * descriptor for the USB 3.0 roothub. If not, we stall the
1226 * endpoint, like external hubs do.
1228 if (hcd->speed >= HCD_USB3 &&
1229 (wLength < USB_DT_SS_HUB_SIZE ||
1230 wValue != (USB_DT_SS_HUB << 8))) {
1231 xhci_dbg(xhci, "Wrong hub descriptor type for "
1232 "USB 3.0 roothub.\n");
1235 xhci_hub_descriptor(hcd, xhci,
1236 (struct usb_hub_descriptor *) buf);
1238 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
1239 if ((wValue & 0xff00) != (USB_DT_BOS << 8))
1242 if (hcd->speed < HCD_USB3)
1245 retval = xhci_create_usb3x_bos_desc(xhci, buf, wLength);
1246 spin_unlock_irqrestore(&xhci->lock, flags);
1249 if (!portnum1 || portnum1 > max_ports)
1253 port = ports[portnum1 - 1];
1254 temp = readl(port->addr);
1255 if (temp == ~(u32)0) {
1260 trace_xhci_get_port_status(wIndex, temp);
1261 status = xhci_get_port_status(hcd, bus_state, wIndex, temp,
1263 if (status == 0xffffffff)
1266 xhci_dbg(xhci, "Get port status %d-%d read: 0x%x, return 0x%x",
1267 hcd->self.busnum, portnum1, temp, status);
1269 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
1270 /* if USB 3.1 extended port status return additional 4 bytes */
1271 if (wValue == 0x02) {
1274 if (hcd->speed < HCD_USB31 || wLength != 8) {
1275 xhci_err(xhci, "get ext port status invalid parameter\n");
1279 port_li = readl(port->addr + PORTLI);
1280 status = xhci_get_ext_port_status(temp, port_li);
1281 put_unaligned_le32(status, &buf[4]);
1284 case SetPortFeature:
1285 if (wValue == USB_PORT_FEAT_LINK_STATE)
1286 link_state = (wIndex & 0xff00) >> 3;
1287 if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
1288 wake_mask = wIndex & 0xff00;
1289 if (wValue == USB_PORT_FEAT_TEST)
1290 test_mode = (wIndex & 0xff00) >> 8;
1291 /* The MSB of wIndex is the U1/U2 timeout */
1292 timeout = (wIndex & 0xff00) >> 8;
1295 if (!portnum1 || portnum1 > max_ports)
1298 port = ports[portnum1 - 1];
1300 temp = readl(port->addr);
1301 if (temp == ~(u32)0) {
1306 temp = xhci_port_state_to_neutral(temp);
1307 /* FIXME: What new port features do we need to support? */
1309 case USB_PORT_FEAT_SUSPEND:
1310 temp = readl(port->addr);
1311 if ((temp & PORT_PLS_MASK) != XDEV_U0) {
1312 /* Resume the port to U0 first */
1313 xhci_set_link_state(xhci, port, XDEV_U0);
1314 spin_unlock_irqrestore(&xhci->lock, flags);
1316 spin_lock_irqsave(&xhci->lock, flags);
1318 /* In spec software should not attempt to suspend
1319 * a port unless the port reports that it is in the
1320 * enabled (PED = ‘1’,PLS < ‘3’) state.
1322 temp = readl(port->addr);
1323 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
1324 || (temp & PORT_PLS_MASK) >= XDEV_U3) {
1325 xhci_warn(xhci, "USB core suspending port %d-%d not in U0/U1/U2\n",
1326 hcd->self.busnum, portnum1);
1330 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1333 xhci_warn(xhci, "slot_id is zero\n");
1336 /* unlock to execute stop endpoint commands */
1337 spin_unlock_irqrestore(&xhci->lock, flags);
1338 xhci_stop_device(xhci, slot_id, 1);
1339 spin_lock_irqsave(&xhci->lock, flags);
1341 xhci_set_link_state(xhci, port, XDEV_U3);
1343 spin_unlock_irqrestore(&xhci->lock, flags);
1344 msleep(10); /* wait device to enter */
1345 spin_lock_irqsave(&xhci->lock, flags);
1347 temp = readl(port->addr);
1348 bus_state->suspended_ports |= 1 << wIndex;
1350 case USB_PORT_FEAT_LINK_STATE:
1351 temp = readl(port->addr);
1353 if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
1354 xhci_dbg(xhci, "Disable port %d-%d\n",
1355 hcd->self.busnum, portnum1);
1356 temp = xhci_port_state_to_neutral(temp);
1358 * Clear all change bits, so that we get a new
1361 temp |= PORT_CSC | PORT_PEC | PORT_WRC |
1362 PORT_OCC | PORT_RC | PORT_PLC |
1364 writel(temp | PORT_PE, port->addr);
1365 temp = readl(port->addr);
1369 /* Put link in RxDetect (enable port) */
1370 if (link_state == USB_SS_PORT_LS_RX_DETECT) {
1371 xhci_dbg(xhci, "Enable port %d-%d\n",
1372 hcd->self.busnum, portnum1);
1373 xhci_set_link_state(xhci, port, link_state);
1374 temp = readl(port->addr);
1379 * For xHCI 1.1 according to section 4.19.1.2.4.1 a
1380 * root hub port's transition to compliance mode upon
1381 * detecting LFPS timeout may be controlled by an
1382 * Compliance Transition Enabled (CTE) flag (not
1383 * software visible). This flag is set by writing 0xA
1384 * to PORTSC PLS field which will allow transition to
1385 * compliance mode the next time LFPS timeout is
1386 * encountered. A warm reset will clear it.
1388 * The CTE flag is only supported if the HCCPARAMS2 CTC
1389 * flag is set, otherwise, the compliance substate is
1390 * automatically entered as on 1.0 and prior.
1392 if (link_state == USB_SS_PORT_LS_COMP_MOD) {
1393 if (!HCC2_CTC(xhci->hcc_params2)) {
1394 xhci_dbg(xhci, "CTC flag is 0, port already supports entering compliance mode\n");
1398 if ((temp & PORT_CONNECT)) {
1399 xhci_warn(xhci, "Can't set compliance mode when port is connected\n");
1403 xhci_dbg(xhci, "Enable compliance mode transition for port %d-%d\n",
1404 hcd->self.busnum, portnum1);
1405 xhci_set_link_state(xhci, port, link_state);
1407 temp = readl(port->addr);
1410 /* Port must be enabled */
1411 if (!(temp & PORT_PE)) {
1415 /* Can't set port link state above '3' (U3) */
1416 if (link_state > USB_SS_PORT_LS_U3) {
1417 xhci_warn(xhci, "Cannot set port %d-%d link state %d\n",
1418 hcd->self.busnum, portnum1, link_state);
1423 * set link to U0, steps depend on current link state.
1424 * U3: set link to U0 and wait for u3exit completion.
1425 * U1/U2: no PLC complete event, only set link to U0.
1426 * Resume/Recovery: device initiated U0, only wait for
1429 if (link_state == USB_SS_PORT_LS_U0) {
1430 u32 pls = temp & PORT_PLS_MASK;
1431 bool wait_u0 = false;
1436 if (pls == XDEV_U3 ||
1437 pls == XDEV_RESUME ||
1438 pls == XDEV_RECOVERY) {
1440 reinit_completion(&port->u3exit_done);
1442 if (pls <= XDEV_U3) /* U1, U2, U3 */
1443 xhci_set_link_state(xhci, port, USB_SS_PORT_LS_U0);
1449 spin_unlock_irqrestore(&xhci->lock, flags);
1450 if (!wait_for_completion_timeout(&port->u3exit_done,
1451 msecs_to_jiffies(500)))
1452 xhci_dbg(xhci, "missing U0 port change event for port %d-%d\n",
1453 hcd->self.busnum, portnum1);
1454 spin_lock_irqsave(&xhci->lock, flags);
1455 temp = readl(port->addr);
1459 if (link_state == USB_SS_PORT_LS_U3) {
1461 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1464 /* unlock to execute stop endpoint
1466 spin_unlock_irqrestore(&xhci->lock,
1468 xhci_stop_device(xhci, slot_id, 1);
1469 spin_lock_irqsave(&xhci->lock, flags);
1471 xhci_set_link_state(xhci, port, USB_SS_PORT_LS_U3);
1472 spin_unlock_irqrestore(&xhci->lock, flags);
1474 usleep_range(4000, 8000);
1475 temp = readl(port->addr);
1476 if ((temp & PORT_PLS_MASK) == XDEV_U3)
1479 spin_lock_irqsave(&xhci->lock, flags);
1480 temp = readl(port->addr);
1481 bus_state->suspended_ports |= 1 << wIndex;
1484 case USB_PORT_FEAT_POWER:
1486 * Turn on ports, even if there isn't per-port switching.
1487 * HC will report connect events even before this is set.
1488 * However, hub_wq will ignore the roothub events until
1489 * the roothub is registered.
1491 xhci_set_port_power(xhci, port, true, &flags);
1493 case USB_PORT_FEAT_RESET:
1494 temp = (temp | PORT_RESET);
1495 writel(temp, port->addr);
1497 temp = readl(port->addr);
1498 xhci_dbg(xhci, "set port reset, actual port %d-%d status = 0x%x\n",
1499 hcd->self.busnum, portnum1, temp);
1501 case USB_PORT_FEAT_REMOTE_WAKE_MASK:
1502 xhci_set_remote_wake_mask(xhci, port, wake_mask);
1503 temp = readl(port->addr);
1504 xhci_dbg(xhci, "set port remote wake mask, actual port %d-%d status = 0x%x\n",
1505 hcd->self.busnum, portnum1, temp);
1507 case USB_PORT_FEAT_BH_PORT_RESET:
1509 writel(temp, port->addr);
1510 temp = readl(port->addr);
1512 case USB_PORT_FEAT_U1_TIMEOUT:
1513 if (hcd->speed < HCD_USB3)
1515 temp = readl(port->addr + PORTPMSC);
1516 temp &= ~PORT_U1_TIMEOUT_MASK;
1517 temp |= PORT_U1_TIMEOUT(timeout);
1518 writel(temp, port->addr + PORTPMSC);
1520 case USB_PORT_FEAT_U2_TIMEOUT:
1521 if (hcd->speed < HCD_USB3)
1523 temp = readl(port->addr + PORTPMSC);
1524 temp &= ~PORT_U2_TIMEOUT_MASK;
1525 temp |= PORT_U2_TIMEOUT(timeout);
1526 writel(temp, port->addr + PORTPMSC);
1528 case USB_PORT_FEAT_TEST:
1529 /* 4.19.6 Port Test Modes (USB2 Test Mode) */
1530 if (hcd->speed != HCD_USB2)
1532 if (test_mode > USB_TEST_FORCE_ENABLE ||
1533 test_mode < USB_TEST_J)
1535 retval = xhci_enter_test_mode(xhci, test_mode, wIndex,
1541 /* unblock any posted writes */
1542 temp = readl(port->addr);
1544 case ClearPortFeature:
1545 if (!portnum1 || portnum1 > max_ports)
1548 port = ports[portnum1 - 1];
1551 temp = readl(port->addr);
1552 if (temp == ~(u32)0) {
1557 /* FIXME: What new port features do we need to support? */
1558 temp = xhci_port_state_to_neutral(temp);
1560 case USB_PORT_FEAT_SUSPEND:
1561 temp = readl(port->addr);
1562 xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
1563 xhci_dbg(xhci, "PORTSC %04x\n", temp);
1564 if (temp & PORT_RESET)
1566 if ((temp & PORT_PLS_MASK) == XDEV_U3) {
1567 if ((temp & PORT_PE) == 0)
1570 set_bit(wIndex, &bus_state->resuming_ports);
1571 usb_hcd_start_port_resume(&hcd->self, wIndex);
1572 xhci_set_link_state(xhci, port, XDEV_RESUME);
1573 spin_unlock_irqrestore(&xhci->lock, flags);
1574 msleep(USB_RESUME_TIMEOUT);
1575 spin_lock_irqsave(&xhci->lock, flags);
1576 xhci_set_link_state(xhci, port, XDEV_U0);
1577 clear_bit(wIndex, &bus_state->resuming_ports);
1578 usb_hcd_end_port_resume(&hcd->self, wIndex);
1580 bus_state->port_c_suspend |= 1 << wIndex;
1582 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1585 xhci_dbg(xhci, "slot_id is zero\n");
1588 xhci_ring_device(xhci, slot_id);
1590 case USB_PORT_FEAT_C_SUSPEND:
1591 bus_state->port_c_suspend &= ~(1 << wIndex);
1593 case USB_PORT_FEAT_C_RESET:
1594 case USB_PORT_FEAT_C_BH_PORT_RESET:
1595 case USB_PORT_FEAT_C_CONNECTION:
1596 case USB_PORT_FEAT_C_OVER_CURRENT:
1597 case USB_PORT_FEAT_C_ENABLE:
1598 case USB_PORT_FEAT_C_PORT_LINK_STATE:
1599 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
1600 xhci_clear_port_change_bit(xhci, wValue, wIndex,
1603 case USB_PORT_FEAT_ENABLE:
1604 xhci_disable_port(hcd, xhci, wIndex,
1607 case USB_PORT_FEAT_POWER:
1608 xhci_set_port_power(xhci, port, false, &flags);
1610 case USB_PORT_FEAT_TEST:
1611 retval = xhci_exit_test_mode(xhci);
1619 /* "stall" on error */
1622 spin_unlock_irqrestore(&xhci->lock, flags);
1625 EXPORT_SYMBOL_GPL(xhci_hub_control);
1628 * Returns 0 if the status hasn't changed, or the number of bytes in buf.
1629 * Ports are 0-indexed from the HCD point of view,
1630 * and 1-indexed from the USB core pointer of view.
1632 * Note that the status change bits will be cleared as soon as a port status
1633 * change event is generated, so we use the saved status from that event.
1635 int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
1637 unsigned long flags;
1641 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1643 struct xhci_bus_state *bus_state;
1644 bool reset_change = false;
1645 struct xhci_hub *rhub;
1646 struct xhci_port **ports;
1648 rhub = xhci_get_rhub(hcd);
1649 ports = rhub->ports;
1650 max_ports = rhub->num_ports;
1651 bus_state = &rhub->bus_state;
1653 /* Initial status is no changes */
1654 retval = (max_ports + 8) / 8;
1655 memset(buf, 0, retval);
1658 * Inform the usbcore about resume-in-progress by returning
1659 * a non-zero value even if there are no status changes.
1661 spin_lock_irqsave(&xhci->lock, flags);
1663 status = bus_state->resuming_ports;
1666 * SS devices are only visible to roothub after link training completes.
1667 * Keep polling roothubs for a grace period after xHC start
1669 if (xhci->run_graceperiod) {
1670 if (time_before(jiffies, xhci->run_graceperiod))
1673 xhci->run_graceperiod = 0;
1676 mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC | PORT_CEC;
1678 /* For each port, did anything change? If so, set that bit in buf. */
1679 for (i = 0; i < max_ports; i++) {
1680 temp = readl(ports[i]->addr);
1681 if (temp == ~(u32)0) {
1686 trace_xhci_hub_status_data(i, temp);
1688 if ((temp & mask) != 0 ||
1689 (bus_state->port_c_suspend & 1 << i) ||
1690 (ports[i]->resume_done && time_after_eq(
1691 jiffies, ports[i]->resume_done))) {
1692 buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
1695 if ((temp & PORT_RC))
1696 reset_change = true;
1700 if (!status && !reset_change) {
1701 xhci_dbg(xhci, "%s: stopping usb%d port polling\n",
1702 __func__, hcd->self.busnum);
1703 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
1705 spin_unlock_irqrestore(&xhci->lock, flags);
1706 return status ? retval : 0;
1711 int xhci_bus_suspend(struct usb_hcd *hcd)
1713 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1714 int max_ports, port_index;
1715 struct xhci_bus_state *bus_state;
1716 unsigned long flags;
1717 struct xhci_hub *rhub;
1718 struct xhci_port **ports;
1719 u32 portsc_buf[USB_MAXCHILDREN];
1722 rhub = xhci_get_rhub(hcd);
1723 ports = rhub->ports;
1724 max_ports = rhub->num_ports;
1725 bus_state = &rhub->bus_state;
1726 wake_enabled = hcd->self.root_hub->do_remote_wakeup;
1728 spin_lock_irqsave(&xhci->lock, flags);
1731 if (bus_state->resuming_ports || /* USB2 */
1732 bus_state->port_remote_wakeup) { /* USB3 */
1733 spin_unlock_irqrestore(&xhci->lock, flags);
1734 xhci_dbg(xhci, "usb%d bus suspend to fail because a port is resuming\n",
1740 * Prepare ports for suspend, but don't write anything before all ports
1741 * are checked and we know bus suspend can proceed
1743 bus_state->bus_suspended = 0;
1744 port_index = max_ports;
1745 while (port_index--) {
1749 t1 = readl(ports[port_index]->addr);
1750 t2 = xhci_port_state_to_neutral(t1);
1751 portsc_buf[port_index] = 0;
1754 * Give a USB3 port in link training time to finish, but don't
1755 * prevent suspend as port might be stuck
1757 if ((hcd->speed >= HCD_USB3) && retries-- &&
1758 (t1 & PORT_PLS_MASK) == XDEV_POLLING) {
1759 spin_unlock_irqrestore(&xhci->lock, flags);
1760 msleep(XHCI_PORT_POLLING_LFPS_TIME);
1761 spin_lock_irqsave(&xhci->lock, flags);
1762 xhci_dbg(xhci, "port %d-%d polling in bus suspend, waiting\n",
1763 hcd->self.busnum, port_index + 1);
1766 /* bail out if port detected a over-current condition */
1768 bus_state->bus_suspended = 0;
1769 spin_unlock_irqrestore(&xhci->lock, flags);
1770 xhci_dbg(xhci, "Bus suspend bailout, port over-current detected\n");
1773 /* suspend ports in U0, or bail out for new connect changes */
1774 if ((t1 & PORT_PE) && (t1 & PORT_PLS_MASK) == XDEV_U0) {
1775 if ((t1 & PORT_CSC) && wake_enabled) {
1776 bus_state->bus_suspended = 0;
1777 spin_unlock_irqrestore(&xhci->lock, flags);
1778 xhci_dbg(xhci, "Bus suspend bailout, port connect change\n");
1781 xhci_dbg(xhci, "port %d-%d not suspended\n",
1782 hcd->self.busnum, port_index + 1);
1783 t2 &= ~PORT_PLS_MASK;
1784 t2 |= PORT_LINK_STROBE | XDEV_U3;
1785 set_bit(port_index, &bus_state->bus_suspended);
1787 /* USB core sets remote wake mask for USB 3.0 hubs,
1788 * including the USB 3.0 roothub, but only if CONFIG_PM
1789 * is enabled, so also enable remote wake here.
1792 if (t1 & PORT_CONNECT) {
1793 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
1794 t2 &= ~PORT_WKCONN_E;
1796 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
1797 t2 &= ~PORT_WKDISC_E;
1800 if ((xhci->quirks & XHCI_U2_DISABLE_WAKE) &&
1801 (hcd->speed < HCD_USB3)) {
1802 if (usb_amd_pt_check_port(hcd->self.controller,
1804 t2 &= ~PORT_WAKE_BITS;
1807 t2 &= ~PORT_WAKE_BITS;
1809 t1 = xhci_port_state_to_neutral(t1);
1811 portsc_buf[port_index] = t2;
1814 /* write port settings, stopping and suspending ports if needed */
1815 port_index = max_ports;
1816 while (port_index--) {
1817 if (!portsc_buf[port_index])
1819 if (test_bit(port_index, &bus_state->bus_suspended)) {
1822 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1825 spin_unlock_irqrestore(&xhci->lock, flags);
1826 xhci_stop_device(xhci, slot_id, 1);
1827 spin_lock_irqsave(&xhci->lock, flags);
1830 writel(portsc_buf[port_index], ports[port_index]->addr);
1832 hcd->state = HC_STATE_SUSPENDED;
1833 bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
1834 spin_unlock_irqrestore(&xhci->lock, flags);
1836 if (bus_state->bus_suspended)
1837 usleep_range(5000, 10000);
1843 * Workaround for missing Cold Attach Status (CAS) if device re-plugged in S3.
1844 * warm reset a USB3 device stuck in polling or compliance mode after resume.
1845 * See Intel 100/c230 series PCH specification update Doc #332692-006 Errata #8
1847 static bool xhci_port_missing_cas_quirk(struct xhci_port *port)
1851 portsc = readl(port->addr);
1853 /* if any of these are set we are not stuck */
1854 if (portsc & (PORT_CONNECT | PORT_CAS))
1857 if (((portsc & PORT_PLS_MASK) != XDEV_POLLING) &&
1858 ((portsc & PORT_PLS_MASK) != XDEV_COMP_MODE))
1861 /* clear wakeup/change bits, and do a warm port reset */
1862 portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
1864 writel(portsc, port->addr);
1870 int xhci_bus_resume(struct usb_hcd *hcd)
1872 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1873 struct xhci_bus_state *bus_state;
1874 unsigned long flags;
1875 int max_ports, port_index;
1880 struct xhci_hub *rhub;
1881 struct xhci_port **ports;
1883 rhub = xhci_get_rhub(hcd);
1884 ports = rhub->ports;
1885 max_ports = rhub->num_ports;
1886 bus_state = &rhub->bus_state;
1888 if (time_before(jiffies, bus_state->next_statechange))
1891 spin_lock_irqsave(&xhci->lock, flags);
1892 if (!HCD_HW_ACCESSIBLE(hcd)) {
1893 spin_unlock_irqrestore(&xhci->lock, flags);
1897 /* delay the irqs */
1898 temp = readl(&xhci->op_regs->command);
1900 writel(temp, &xhci->op_regs->command);
1902 /* bus specific resume for ports we suspended at bus_suspend */
1903 if (hcd->speed >= HCD_USB3)
1904 next_state = XDEV_U0;
1906 next_state = XDEV_RESUME;
1908 port_index = max_ports;
1909 while (port_index--) {
1910 portsc = readl(ports[port_index]->addr);
1912 /* warm reset CAS limited ports stuck in polling/compliance */
1913 if ((xhci->quirks & XHCI_MISSING_CAS) &&
1914 (hcd->speed >= HCD_USB3) &&
1915 xhci_port_missing_cas_quirk(ports[port_index])) {
1916 xhci_dbg(xhci, "reset stuck port %d-%d\n",
1917 hcd->self.busnum, port_index + 1);
1918 clear_bit(port_index, &bus_state->bus_suspended);
1921 /* resume if we suspended the link, and it is still suspended */
1922 if (test_bit(port_index, &bus_state->bus_suspended))
1923 switch (portsc & PORT_PLS_MASK) {
1925 portsc = xhci_port_state_to_neutral(portsc);
1926 portsc &= ~PORT_PLS_MASK;
1927 portsc |= PORT_LINK_STROBE | next_state;
1930 /* resume already initiated */
1933 /* not in a resumeable state, ignore it */
1934 clear_bit(port_index,
1935 &bus_state->bus_suspended);
1938 /* disable wake for all ports, write new link state if needed */
1939 portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
1940 writel(portsc, ports[port_index]->addr);
1943 /* USB2 specific resume signaling delay and U0 link state transition */
1944 if (hcd->speed < HCD_USB3) {
1945 if (bus_state->bus_suspended) {
1946 spin_unlock_irqrestore(&xhci->lock, flags);
1947 msleep(USB_RESUME_TIMEOUT);
1948 spin_lock_irqsave(&xhci->lock, flags);
1950 for_each_set_bit(port_index, &bus_state->bus_suspended,
1952 /* Clear PLC to poll it later for U0 transition */
1953 xhci_test_and_clear_bit(xhci, ports[port_index],
1955 xhci_set_link_state(xhci, ports[port_index], XDEV_U0);
1959 /* poll for U0 link state complete, both USB2 and USB3 */
1960 for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) {
1961 sret = xhci_handshake(ports[port_index]->addr, PORT_PLC,
1962 PORT_PLC, 10 * 1000);
1964 xhci_warn(xhci, "port %d-%d resume PLC timeout\n",
1965 hcd->self.busnum, port_index + 1);
1968 xhci_test_and_clear_bit(xhci, ports[port_index], PORT_PLC);
1969 slot_id = xhci_find_slot_id_by_port(hcd, xhci, port_index + 1);
1971 xhci_ring_device(xhci, slot_id);
1973 (void) readl(&xhci->op_regs->command);
1975 bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
1976 /* re-enable irqs */
1977 temp = readl(&xhci->op_regs->command);
1979 writel(temp, &xhci->op_regs->command);
1980 temp = readl(&xhci->op_regs->command);
1982 spin_unlock_irqrestore(&xhci->lock, flags);
1986 unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd)
1988 struct xhci_hub *rhub = xhci_get_rhub(hcd);
1990 /* USB3 port wakeups are reported via usb_wakeup_notification() */
1991 return rhub->bus_state.resuming_ports; /* USB2 ports only */
1994 #endif /* CONFIG_PM */