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1/*
2 * xHCI host controller driver
3 *
4 * Copyright (C) 2008 Intel Corp.
5 *
6 * Author: Sarah Sharp
7 * Some code borrowed from the Linux EHCI driver.
8 *
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.
12 *
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
16 * for more details.
17 *
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.
21 */
22
23
24#include <linux/slab.h>
25#include <asm/unaligned.h>
26
27#include "xhci.h"
28#include "xhci-trace.h"
29
30#define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E)
31#define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \
32 PORT_RC | PORT_PLC | PORT_PE)
33
34/* USB 3 BOS descriptor and a capability descriptors, combined.
35 * Fields will be adjusted and added later in xhci_create_usb3_bos_desc()
36 */
37static u8 usb_bos_descriptor [] = {
38 USB_DT_BOS_SIZE, /* __u8 bLength, 5 bytes */
39 USB_DT_BOS, /* __u8 bDescriptorType */
40 0x0F, 0x00, /* __le16 wTotalLength, 15 bytes */
41 0x1, /* __u8 bNumDeviceCaps */
42 /* First device capability, SuperSpeed */
43 USB_DT_USB_SS_CAP_SIZE, /* __u8 bLength, 10 bytes */
44 USB_DT_DEVICE_CAPABILITY, /* Device Capability */
45 USB_SS_CAP_TYPE, /* bDevCapabilityType, SUPERSPEED_USB */
46 0x00, /* bmAttributes, LTM off by default */
47 USB_5GBPS_OPERATION, 0x00, /* wSpeedsSupported, 5Gbps only */
48 0x03, /* bFunctionalitySupport,
49 USB 3.0 speed only */
50 0x00, /* bU1DevExitLat, set later. */
51 0x00, 0x00, /* __le16 bU2DevExitLat, set later. */
52 /* Second device capability, SuperSpeedPlus */
53 0x1c, /* bLength 28, will be adjusted later */
54 USB_DT_DEVICE_CAPABILITY, /* Device Capability */
55 USB_SSP_CAP_TYPE, /* bDevCapabilityType SUPERSPEED_PLUS */
56 0x00, /* bReserved 0 */
57 0x23, 0x00, 0x00, 0x00, /* bmAttributes, SSAC=3 SSIC=1 */
58 0x01, 0x00, /* wFunctionalitySupport */
59 0x00, 0x00, /* wReserved 0 */
60 /* Default Sublink Speed Attributes, overwrite if custom PSI exists */
61 0x34, 0x00, 0x05, 0x00, /* 5Gbps, symmetric, rx, ID = 4 */
62 0xb4, 0x00, 0x05, 0x00, /* 5Gbps, symmetric, tx, ID = 4 */
63 0x35, 0x40, 0x0a, 0x00, /* 10Gbps, SSP, symmetric, rx, ID = 5 */
64 0xb5, 0x40, 0x0a, 0x00, /* 10Gbps, SSP, symmetric, tx, ID = 5 */
65};
66
67static int xhci_create_usb3_bos_desc(struct xhci_hcd *xhci, char *buf,
68 u16 wLength)
69{
70 int i, ssa_count;
71 u32 temp;
72 u16 desc_size, ssp_cap_size, ssa_size = 0;
73 bool usb3_1 = false;
74
75 desc_size = USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
76 ssp_cap_size = sizeof(usb_bos_descriptor) - desc_size;
77
78 /* does xhci support USB 3.1 Enhanced SuperSpeed */
79 if (xhci->usb3_rhub.min_rev >= 0x01) {
80 /* does xhci provide a PSI table for SSA speed attributes? */
81 if (xhci->usb3_rhub.psi_count) {
82 /* two SSA entries for each unique PSI ID, RX and TX */
83 ssa_count = xhci->usb3_rhub.psi_uid_count * 2;
84 ssa_size = ssa_count * sizeof(u32);
85 ssp_cap_size -= 16; /* skip copying the default SSA */
86 }
87 desc_size += ssp_cap_size;
88 usb3_1 = true;
89 }
90 memcpy(buf, &usb_bos_descriptor, min(desc_size, wLength));
91
92 if (usb3_1) {
93 /* modify bos descriptor bNumDeviceCaps and wTotalLength */
94 buf[4] += 1;
95 put_unaligned_le16(desc_size + ssa_size, &buf[2]);
96 }
97
98 if (wLength < USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE)
99 return wLength;
100
101 /* Indicate whether the host has LTM support. */
102 temp = readl(&xhci->cap_regs->hcc_params);
103 if (HCC_LTC(temp))
104 buf[8] |= USB_LTM_SUPPORT;
105
106 /* Set the U1 and U2 exit latencies. */
107 if ((xhci->quirks & XHCI_LPM_SUPPORT)) {
108 temp = readl(&xhci->cap_regs->hcs_params3);
109 buf[12] = HCS_U1_LATENCY(temp);
110 put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);
111 }
112
113 /* If PSI table exists, add the custom speed attributes from it */
114 if (usb3_1 && xhci->usb3_rhub.psi_count) {
115 u32 ssp_cap_base, bm_attrib, psi;
116 int offset;
117
118 ssp_cap_base = USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
119
120 if (wLength < desc_size)
121 return wLength;
122 buf[ssp_cap_base] = ssp_cap_size + ssa_size;
123
124 /* attribute count SSAC bits 4:0 and ID count SSIC bits 8:5 */
125 bm_attrib = (ssa_count - 1) & 0x1f;
126 bm_attrib |= (xhci->usb3_rhub.psi_uid_count - 1) << 5;
127 put_unaligned_le32(bm_attrib, &buf[ssp_cap_base + 4]);
128
129 if (wLength < desc_size + ssa_size)
130 return wLength;
131 /*
132 * Create the Sublink Speed Attributes (SSA) array.
133 * The xhci PSI field and USB 3.1 SSA fields are very similar,
134 * but link type bits 7:6 differ for values 01b and 10b.
135 * xhci has also only one PSI entry for a symmetric link when
136 * USB 3.1 requires two SSA entries (RX and TX) for every link
137 */
138 offset = desc_size;
139 for (i = 0; i < xhci->usb3_rhub.psi_count; i++) {
140 psi = xhci->usb3_rhub.psi[i];
141 psi &= ~USB_SSP_SUBLINK_SPEED_RSVD;
142 if ((psi & PLT_MASK) == PLT_SYM) {
143 /* Symmetric, create SSA RX and TX from one PSI entry */
144 put_unaligned_le32(psi, &buf[offset]);
145 psi |= 1 << 7; /* turn entry to TX */
146 offset += 4;
147 if (offset >= desc_size + ssa_size)
148 return desc_size + ssa_size;
149 } else if ((psi & PLT_MASK) == PLT_ASYM_RX) {
150 /* Asymetric RX, flip bits 7:6 for SSA */
151 psi ^= PLT_MASK;
152 }
153 put_unaligned_le32(psi, &buf[offset]);
154 offset += 4;
155 if (offset >= desc_size + ssa_size)
156 return desc_size + ssa_size;
157 }
158 }
159 /* ssa_size is 0 for other than usb 3.1 hosts */
160 return desc_size + ssa_size;
161}
162
163static void xhci_common_hub_descriptor(struct xhci_hcd *xhci,
164 struct usb_hub_descriptor *desc, int ports)
165{
166 u16 temp;
167
168 desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */
169 desc->bHubContrCurrent = 0;
170
171 desc->bNbrPorts = ports;
172 temp = 0;
173 /* Bits 1:0 - support per-port power switching, or power always on */
174 if (HCC_PPC(xhci->hcc_params))
175 temp |= HUB_CHAR_INDV_PORT_LPSM;
176 else
177 temp |= HUB_CHAR_NO_LPSM;
178 /* Bit 2 - root hubs are not part of a compound device */
179 /* Bits 4:3 - individual port over current protection */
180 temp |= HUB_CHAR_INDV_PORT_OCPM;
181 /* Bits 6:5 - no TTs in root ports */
182 /* Bit 7 - no port indicators */
183 desc->wHubCharacteristics = cpu_to_le16(temp);
184}
185
186/* Fill in the USB 2.0 roothub descriptor */
187static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
188 struct usb_hub_descriptor *desc)
189{
190 int ports;
191 u16 temp;
192 __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8];
193 u32 portsc;
194 unsigned int i;
195
196 ports = xhci->num_usb2_ports;
197
198 xhci_common_hub_descriptor(xhci, desc, ports);
199 desc->bDescriptorType = USB_DT_HUB;
200 temp = 1 + (ports / 8);
201 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
202
203 /* The Device Removable bits are reported on a byte granularity.
204 * If the port doesn't exist within that byte, the bit is set to 0.
205 */
206 memset(port_removable, 0, sizeof(port_removable));
207 for (i = 0; i < ports; i++) {
208 portsc = readl(xhci->usb2_ports[i]);
209 /* If a device is removable, PORTSC reports a 0, same as in the
210 * hub descriptor DeviceRemovable bits.
211 */
212 if (portsc & PORT_DEV_REMOVE)
213 /* This math is hairy because bit 0 of DeviceRemovable
214 * is reserved, and bit 1 is for port 1, etc.
215 */
216 port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8);
217 }
218
219 /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN
220 * ports on it. The USB 2.0 specification says that there are two
221 * variable length fields at the end of the hub descriptor:
222 * DeviceRemovable and PortPwrCtrlMask. But since we can have less than
223 * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array
224 * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to
225 * 0xFF, so we initialize the both arrays (DeviceRemovable and
226 * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each
227 * set of ports that actually exist.
228 */
229 memset(desc->u.hs.DeviceRemovable, 0xff,
230 sizeof(desc->u.hs.DeviceRemovable));
231 memset(desc->u.hs.PortPwrCtrlMask, 0xff,
232 sizeof(desc->u.hs.PortPwrCtrlMask));
233
234 for (i = 0; i < (ports + 1 + 7) / 8; i++)
235 memset(&desc->u.hs.DeviceRemovable[i], port_removable[i],
236 sizeof(__u8));
237}
238
239/* Fill in the USB 3.0 roothub descriptor */
240static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
241 struct usb_hub_descriptor *desc)
242{
243 int ports;
244 u16 port_removable;
245 u32 portsc;
246 unsigned int i;
247
248 ports = xhci->num_usb3_ports;
249 xhci_common_hub_descriptor(xhci, desc, ports);
250 desc->bDescriptorType = USB_DT_SS_HUB;
251 desc->bDescLength = USB_DT_SS_HUB_SIZE;
252
253 /* header decode latency should be zero for roothubs,
254 * see section 4.23.5.2.
255 */
256 desc->u.ss.bHubHdrDecLat = 0;
257 desc->u.ss.wHubDelay = 0;
258
259 port_removable = 0;
260 /* bit 0 is reserved, bit 1 is for port 1, etc. */
261 for (i = 0; i < ports; i++) {
262 portsc = readl(xhci->usb3_ports[i]);
263 if (portsc & PORT_DEV_REMOVE)
264 port_removable |= 1 << (i + 1);
265 }
266
267 desc->u.ss.DeviceRemovable = cpu_to_le16(port_removable);
268}
269
270static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
271 struct usb_hub_descriptor *desc)
272{
273
274 if (hcd->speed >= HCD_USB3)
275 xhci_usb3_hub_descriptor(hcd, xhci, desc);
276 else
277 xhci_usb2_hub_descriptor(hcd, xhci, desc);
278
279}
280
281static unsigned int xhci_port_speed(unsigned int port_status)
282{
283 if (DEV_LOWSPEED(port_status))
284 return USB_PORT_STAT_LOW_SPEED;
285 if (DEV_HIGHSPEED(port_status))
286 return USB_PORT_STAT_HIGH_SPEED;
287 /*
288 * FIXME: Yes, we should check for full speed, but the core uses that as
289 * a default in portspeed() in usb/core/hub.c (which is the only place
290 * USB_PORT_STAT_*_SPEED is used).
291 */
292 return 0;
293}
294
295/*
296 * These bits are Read Only (RO) and should be saved and written to the
297 * registers: 0, 3, 10:13, 30
298 * connect status, over-current status, port speed, and device removable.
299 * connect status and port speed are also sticky - meaning they're in
300 * the AUX well and they aren't changed by a hot, warm, or cold reset.
301 */
302#define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30))
303/*
304 * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
305 * bits 5:8, 9, 14:15, 25:27
306 * link state, port power, port indicator state, "wake on" enable state
307 */
308#define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25))
309/*
310 * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
311 * bit 4 (port reset)
312 */
313#define XHCI_PORT_RW1S ((1<<4))
314/*
315 * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
316 * bits 1, 17, 18, 19, 20, 21, 22, 23
317 * port enable/disable, and
318 * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports),
319 * over-current, reset, link state, and L1 change
320 */
321#define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17))
322/*
323 * Bit 16 is RW, and writing a '1' to it causes the link state control to be
324 * latched in
325 */
326#define XHCI_PORT_RW ((1<<16))
327/*
328 * These bits are Reserved Zero (RsvdZ) and zero should be written to them:
329 * bits 2, 24, 28:31
330 */
331#define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28))
332
333/*
334 * Given a port state, this function returns a value that would result in the
335 * port being in the same state, if the value was written to the port status
336 * control register.
337 * Save Read Only (RO) bits and save read/write bits where
338 * writing a 0 clears the bit and writing a 1 sets the bit (RWS).
339 * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect.
340 */
341u32 xhci_port_state_to_neutral(u32 state)
342{
343 /* Save read-only status and port state */
344 return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS);
345}
346
347/*
348 * find slot id based on port number.
349 * @port: The one-based port number from one of the two split roothubs.
350 */
351int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
352 u16 port)
353{
354 int slot_id;
355 int i;
356 enum usb_device_speed speed;
357
358 slot_id = 0;
359 for (i = 0; i < MAX_HC_SLOTS; i++) {
360 if (!xhci->devs[i])
361 continue;
362 speed = xhci->devs[i]->udev->speed;
363 if (((speed >= USB_SPEED_SUPER) == (hcd->speed >= HCD_USB3))
364 && xhci->devs[i]->fake_port == port) {
365 slot_id = i;
366 break;
367 }
368 }
369
370 return slot_id;
371}
372
373/*
374 * Stop device
375 * It issues stop endpoint command for EP 0 to 30. And wait the last command
376 * to complete.
377 * suspend will set to 1, if suspend bit need to set in command.
378 */
379static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
380{
381 struct xhci_virt_device *virt_dev;
382 struct xhci_command *cmd;
383 unsigned long flags;
384 int ret;
385 int i;
386
387 ret = 0;
388 virt_dev = xhci->devs[slot_id];
389 cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO);
390 if (!cmd) {
391 xhci_dbg(xhci, "Couldn't allocate command structure.\n");
392 return -ENOMEM;
393 }
394
395 spin_lock_irqsave(&xhci->lock, flags);
396 for (i = LAST_EP_INDEX; i > 0; i--) {
397 if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) {
398 struct xhci_command *command;
399 command = xhci_alloc_command(xhci, false, false,
400 GFP_NOWAIT);
401 if (!command) {
402 spin_unlock_irqrestore(&xhci->lock, flags);
403 xhci_free_command(xhci, cmd);
404 return -ENOMEM;
405
406 }
407 xhci_queue_stop_endpoint(xhci, command, slot_id, i,
408 suspend);
409 }
410 }
411 xhci_queue_stop_endpoint(xhci, cmd, slot_id, 0, suspend);
412 xhci_ring_cmd_db(xhci);
413 spin_unlock_irqrestore(&xhci->lock, flags);
414
415 /* Wait for last stop endpoint command to finish */
416 wait_for_completion(cmd->completion);
417
418 if (cmd->status == COMP_CMD_ABORT || cmd->status == COMP_CMD_STOP) {
419 xhci_warn(xhci, "Timeout while waiting for stop endpoint command\n");
420 ret = -ETIME;
421 }
422 xhci_free_command(xhci, cmd);
423 return ret;
424}
425
426/*
427 * Ring device, it rings the all doorbells unconditionally.
428 */
429void xhci_ring_device(struct xhci_hcd *xhci, int slot_id)
430{
431 int i, s;
432 struct xhci_virt_ep *ep;
433
434 for (i = 0; i < LAST_EP_INDEX + 1; i++) {
435 ep = &xhci->devs[slot_id]->eps[i];
436
437 if (ep->ep_state & EP_HAS_STREAMS) {
438 for (s = 1; s < ep->stream_info->num_streams; s++)
439 xhci_ring_ep_doorbell(xhci, slot_id, i, s);
440 } else if (ep->ring && ep->ring->dequeue) {
441 xhci_ring_ep_doorbell(xhci, slot_id, i, 0);
442 }
443 }
444
445 return;
446}
447
448static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
449 u16 wIndex, __le32 __iomem *addr, u32 port_status)
450{
451 /* Don't allow the USB core to disable SuperSpeed ports. */
452 if (hcd->speed >= HCD_USB3) {
453 xhci_dbg(xhci, "Ignoring request to disable "
454 "SuperSpeed port.\n");
455 return;
456 }
457
458 /* Write 1 to disable the port */
459 writel(port_status | PORT_PE, addr);
460 port_status = readl(addr);
461 xhci_dbg(xhci, "disable port, actual port %d status = 0x%x\n",
462 wIndex, port_status);
463}
464
465static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
466 u16 wIndex, __le32 __iomem *addr, u32 port_status)
467{
468 char *port_change_bit;
469 u32 status;
470
471 switch (wValue) {
472 case USB_PORT_FEAT_C_RESET:
473 status = PORT_RC;
474 port_change_bit = "reset";
475 break;
476 case USB_PORT_FEAT_C_BH_PORT_RESET:
477 status = PORT_WRC;
478 port_change_bit = "warm(BH) reset";
479 break;
480 case USB_PORT_FEAT_C_CONNECTION:
481 status = PORT_CSC;
482 port_change_bit = "connect";
483 break;
484 case USB_PORT_FEAT_C_OVER_CURRENT:
485 status = PORT_OCC;
486 port_change_bit = "over-current";
487 break;
488 case USB_PORT_FEAT_C_ENABLE:
489 status = PORT_PEC;
490 port_change_bit = "enable/disable";
491 break;
492 case USB_PORT_FEAT_C_SUSPEND:
493 status = PORT_PLC;
494 port_change_bit = "suspend/resume";
495 break;
496 case USB_PORT_FEAT_C_PORT_LINK_STATE:
497 status = PORT_PLC;
498 port_change_bit = "link state";
499 break;
500 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
501 status = PORT_CEC;
502 port_change_bit = "config error";
503 break;
504 default:
505 /* Should never happen */
506 return;
507 }
508 /* Change bits are all write 1 to clear */
509 writel(port_status | status, addr);
510 port_status = readl(addr);
511 xhci_dbg(xhci, "clear port %s change, actual port %d status = 0x%x\n",
512 port_change_bit, wIndex, port_status);
513}
514
515static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array)
516{
517 int max_ports;
518 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
519
520 if (hcd->speed >= HCD_USB3) {
521 max_ports = xhci->num_usb3_ports;
522 *port_array = xhci->usb3_ports;
523 } else {
524 max_ports = xhci->num_usb2_ports;
525 *port_array = xhci->usb2_ports;
526 }
527
528 return max_ports;
529}
530
531void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,
532 int port_id, u32 link_state)
533{
534 u32 temp;
535
536 temp = readl(port_array[port_id]);
537 temp = xhci_port_state_to_neutral(temp);
538 temp &= ~PORT_PLS_MASK;
539 temp |= PORT_LINK_STROBE | link_state;
540 writel(temp, port_array[port_id]);
541}
542
543static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
544 __le32 __iomem **port_array, int port_id, u16 wake_mask)
545{
546 u32 temp;
547
548 temp = readl(port_array[port_id]);
549 temp = xhci_port_state_to_neutral(temp);
550
551 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT)
552 temp |= PORT_WKCONN_E;
553 else
554 temp &= ~PORT_WKCONN_E;
555
556 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT)
557 temp |= PORT_WKDISC_E;
558 else
559 temp &= ~PORT_WKDISC_E;
560
561 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT)
562 temp |= PORT_WKOC_E;
563 else
564 temp &= ~PORT_WKOC_E;
565
566 writel(temp, port_array[port_id]);
567}
568
569/* Test and clear port RWC bit */
570void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array,
571 int port_id, u32 port_bit)
572{
573 u32 temp;
574
575 temp = readl(port_array[port_id]);
576 if (temp & port_bit) {
577 temp = xhci_port_state_to_neutral(temp);
578 temp |= port_bit;
579 writel(temp, port_array[port_id]);
580 }
581}
582
583/* Updates Link Status for USB 2.1 port */
584static void xhci_hub_report_usb2_link_state(u32 *status, u32 status_reg)
585{
586 if ((status_reg & PORT_PLS_MASK) == XDEV_U2)
587 *status |= USB_PORT_STAT_L1;
588}
589
590/* Updates Link Status for super Speed port */
591static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci,
592 u32 *status, u32 status_reg)
593{
594 u32 pls = status_reg & PORT_PLS_MASK;
595
596 /* resume state is a xHCI internal state.
597 * Do not report it to usb core, instead, pretend to be U3,
598 * thus usb core knows it's not ready for transfer
599 */
600 if (pls == XDEV_RESUME) {
601 *status |= USB_SS_PORT_LS_U3;
602 return;
603 }
604
605 /* When the CAS bit is set then warm reset
606 * should be performed on port
607 */
608 if (status_reg & PORT_CAS) {
609 /* The CAS bit can be set while the port is
610 * in any link state.
611 * Only roothubs have CAS bit, so we
612 * pretend to be in compliance mode
613 * unless we're already in compliance
614 * or the inactive state.
615 */
616 if (pls != USB_SS_PORT_LS_COMP_MOD &&
617 pls != USB_SS_PORT_LS_SS_INACTIVE) {
618 pls = USB_SS_PORT_LS_COMP_MOD;
619 }
620 /* Return also connection bit -
621 * hub state machine resets port
622 * when this bit is set.
623 */
624 pls |= USB_PORT_STAT_CONNECTION;
625 } else {
626 /*
627 * If CAS bit isn't set but the Port is already at
628 * Compliance Mode, fake a connection so the USB core
629 * notices the Compliance state and resets the port.
630 * This resolves an issue generated by the SN65LVPE502CP
631 * in which sometimes the port enters compliance mode
632 * caused by a delay on the host-device negotiation.
633 */
634 if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
635 (pls == USB_SS_PORT_LS_COMP_MOD))
636 pls |= USB_PORT_STAT_CONNECTION;
637 }
638
639 /* update status field */
640 *status |= pls;
641}
642
643/*
644 * Function for Compliance Mode Quirk.
645 *
646 * This Function verifies if all xhc USB3 ports have entered U0, if so,
647 * the compliance mode timer is deleted. A port won't enter
648 * compliance mode if it has previously entered U0.
649 */
650static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status,
651 u16 wIndex)
652{
653 u32 all_ports_seen_u0 = ((1 << xhci->num_usb3_ports)-1);
654 bool port_in_u0 = ((status & PORT_PLS_MASK) == XDEV_U0);
655
656 if (!(xhci->quirks & XHCI_COMP_MODE_QUIRK))
657 return;
658
659 if ((xhci->port_status_u0 != all_ports_seen_u0) && port_in_u0) {
660 xhci->port_status_u0 |= 1 << wIndex;
661 if (xhci->port_status_u0 == all_ports_seen_u0) {
662 del_timer_sync(&xhci->comp_mode_recovery_timer);
663 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
664 "All USB3 ports have entered U0 already!");
665 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
666 "Compliance Mode Recovery Timer Deleted.");
667 }
668 }
669}
670
671static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li)
672{
673 u32 ext_stat = 0;
674 int speed_id;
675
676 /* only support rx and tx lane counts of 1 in usb3.1 spec */
677 speed_id = DEV_PORT_SPEED(raw_port_status);
678 ext_stat |= speed_id; /* bits 3:0, RX speed id */
679 ext_stat |= speed_id << 4; /* bits 7:4, TX speed id */
680
681 ext_stat |= PORT_RX_LANES(port_li) << 8; /* bits 11:8 Rx lane count */
682 ext_stat |= PORT_TX_LANES(port_li) << 12; /* bits 15:12 Tx lane count */
683
684 return ext_stat;
685}
686
687/*
688 * Converts a raw xHCI port status into the format that external USB 2.0 or USB
689 * 3.0 hubs use.
690 *
691 * Possible side effects:
692 * - Mark a port as being done with device resume,
693 * and ring the endpoint doorbells.
694 * - Stop the Synopsys redriver Compliance Mode polling.
695 * - Drop and reacquire the xHCI lock, in order to wait for port resume.
696 */
697static u32 xhci_get_port_status(struct usb_hcd *hcd,
698 struct xhci_bus_state *bus_state,
699 __le32 __iomem **port_array,
700 u16 wIndex, u32 raw_port_status,
701 unsigned long flags)
702 __releases(&xhci->lock)
703 __acquires(&xhci->lock)
704{
705 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
706 u32 status = 0;
707 int slot_id;
708
709 /* wPortChange bits */
710 if (raw_port_status & PORT_CSC)
711 status |= USB_PORT_STAT_C_CONNECTION << 16;
712 if (raw_port_status & PORT_PEC)
713 status |= USB_PORT_STAT_C_ENABLE << 16;
714 if ((raw_port_status & PORT_OCC))
715 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
716 if ((raw_port_status & PORT_RC))
717 status |= USB_PORT_STAT_C_RESET << 16;
718 /* USB3.0 only */
719 if (hcd->speed >= HCD_USB3) {
720 /* Port link change with port in resume state should not be
721 * reported to usbcore, as this is an internal state to be
722 * handled by xhci driver. Reporting PLC to usbcore may
723 * cause usbcore clearing PLC first and port change event
724 * irq won't be generated.
725 */
726 if ((raw_port_status & PORT_PLC) &&
727 (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME)
728 status |= USB_PORT_STAT_C_LINK_STATE << 16;
729 if ((raw_port_status & PORT_WRC))
730 status |= USB_PORT_STAT_C_BH_RESET << 16;
731 if ((raw_port_status & PORT_CEC))
732 status |= USB_PORT_STAT_C_CONFIG_ERROR << 16;
733 }
734
735 if (hcd->speed < HCD_USB3) {
736 if ((raw_port_status & PORT_PLS_MASK) == XDEV_U3
737 && (raw_port_status & PORT_POWER))
738 status |= USB_PORT_STAT_SUSPEND;
739 }
740 if ((raw_port_status & PORT_PLS_MASK) == XDEV_RESUME &&
741 !DEV_SUPERSPEED_ANY(raw_port_status)) {
742 if ((raw_port_status & PORT_RESET) ||
743 !(raw_port_status & PORT_PE))
744 return 0xffffffff;
745 /* did port event handler already start resume timing? */
746 if (!bus_state->resume_done[wIndex]) {
747 /* If not, maybe we are in a host initated resume? */
748 if (test_bit(wIndex, &bus_state->resuming_ports)) {
749 /* Host initated resume doesn't time the resume
750 * signalling using resume_done[].
751 * It manually sets RESUME state, sleeps 20ms
752 * and sets U0 state. This should probably be
753 * changed, but not right now.
754 */
755 } else {
756 /* port resume was discovered now and here,
757 * start resume timing
758 */
759 unsigned long timeout = jiffies +
760 msecs_to_jiffies(USB_RESUME_TIMEOUT);
761
762 set_bit(wIndex, &bus_state->resuming_ports);
763 bus_state->resume_done[wIndex] = timeout;
764 mod_timer(&hcd->rh_timer, timeout);
765 }
766 /* Has resume been signalled for USB_RESUME_TIME yet? */
767 } else if (time_after_eq(jiffies,
768 bus_state->resume_done[wIndex])) {
769 int time_left;
770
771 xhci_dbg(xhci, "Resume USB2 port %d\n",
772 wIndex + 1);
773 bus_state->resume_done[wIndex] = 0;
774 clear_bit(wIndex, &bus_state->resuming_ports);
775
776 set_bit(wIndex, &bus_state->rexit_ports);
777 xhci_set_link_state(xhci, port_array, wIndex,
778 XDEV_U0);
779
780 spin_unlock_irqrestore(&xhci->lock, flags);
781 time_left = wait_for_completion_timeout(
782 &bus_state->rexit_done[wIndex],
783 msecs_to_jiffies(
784 XHCI_MAX_REXIT_TIMEOUT));
785 spin_lock_irqsave(&xhci->lock, flags);
786
787 if (time_left) {
788 slot_id = xhci_find_slot_id_by_port(hcd,
789 xhci, wIndex + 1);
790 if (!slot_id) {
791 xhci_dbg(xhci, "slot_id is zero\n");
792 return 0xffffffff;
793 }
794 xhci_ring_device(xhci, slot_id);
795 } else {
796 int port_status = readl(port_array[wIndex]);
797 xhci_warn(xhci, "Port resume took longer than %i msec, port status = 0x%x\n",
798 XHCI_MAX_REXIT_TIMEOUT,
799 port_status);
800 status |= USB_PORT_STAT_SUSPEND;
801 clear_bit(wIndex, &bus_state->rexit_ports);
802 }
803
804 bus_state->port_c_suspend |= 1 << wIndex;
805 bus_state->suspended_ports &= ~(1 << wIndex);
806 } else {
807 /*
808 * The resume has been signaling for less than
809 * USB_RESUME_TIME. Report the port status as SUSPEND,
810 * let the usbcore check port status again and clear
811 * resume signaling later.
812 */
813 status |= USB_PORT_STAT_SUSPEND;
814 }
815 }
816 /*
817 * Clear stale usb2 resume signalling variables in case port changed
818 * state during resume signalling. For example on error
819 */
820 if ((bus_state->resume_done[wIndex] ||
821 test_bit(wIndex, &bus_state->resuming_ports)) &&
822 (raw_port_status & PORT_PLS_MASK) != XDEV_U3 &&
823 (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) {
824 bus_state->resume_done[wIndex] = 0;
825 clear_bit(wIndex, &bus_state->resuming_ports);
826 }
827
828
829 if ((raw_port_status & PORT_PLS_MASK) == XDEV_U0 &&
830 (raw_port_status & PORT_POWER)) {
831 if (bus_state->suspended_ports & (1 << wIndex)) {
832 bus_state->suspended_ports &= ~(1 << wIndex);
833 if (hcd->speed < HCD_USB3)
834 bus_state->port_c_suspend |= 1 << wIndex;
835 }
836 bus_state->resume_done[wIndex] = 0;
837 clear_bit(wIndex, &bus_state->resuming_ports);
838 }
839 if (raw_port_status & PORT_CONNECT) {
840 status |= USB_PORT_STAT_CONNECTION;
841 status |= xhci_port_speed(raw_port_status);
842 }
843 if (raw_port_status & PORT_PE)
844 status |= USB_PORT_STAT_ENABLE;
845 if (raw_port_status & PORT_OC)
846 status |= USB_PORT_STAT_OVERCURRENT;
847 if (raw_port_status & PORT_RESET)
848 status |= USB_PORT_STAT_RESET;
849 if (raw_port_status & PORT_POWER) {
850 if (hcd->speed >= HCD_USB3)
851 status |= USB_SS_PORT_STAT_POWER;
852 else
853 status |= USB_PORT_STAT_POWER;
854 }
855 /* Update Port Link State */
856 if (hcd->speed >= HCD_USB3) {
857 xhci_hub_report_usb3_link_state(xhci, &status, raw_port_status);
858 /*
859 * Verify if all USB3 Ports Have entered U0 already.
860 * Delete Compliance Mode Timer if so.
861 */
862 xhci_del_comp_mod_timer(xhci, raw_port_status, wIndex);
863 } else {
864 xhci_hub_report_usb2_link_state(&status, raw_port_status);
865 }
866 if (bus_state->port_c_suspend & (1 << wIndex))
867 status |= USB_PORT_STAT_C_SUSPEND << 16;
868
869 return status;
870}
871
872int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
873 u16 wIndex, char *buf, u16 wLength)
874{
875 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
876 int max_ports;
877 unsigned long flags;
878 u32 temp, status;
879 int retval = 0;
880 __le32 __iomem **port_array;
881 int slot_id;
882 struct xhci_bus_state *bus_state;
883 u16 link_state = 0;
884 u16 wake_mask = 0;
885 u16 timeout = 0;
886
887 max_ports = xhci_get_ports(hcd, &port_array);
888 bus_state = &xhci->bus_state[hcd_index(hcd)];
889
890 spin_lock_irqsave(&xhci->lock, flags);
891 switch (typeReq) {
892 case GetHubStatus:
893 /* No power source, over-current reported per port */
894 memset(buf, 0, 4);
895 break;
896 case GetHubDescriptor:
897 /* Check to make sure userspace is asking for the USB 3.0 hub
898 * descriptor for the USB 3.0 roothub. If not, we stall the
899 * endpoint, like external hubs do.
900 */
901 if (hcd->speed >= HCD_USB3 &&
902 (wLength < USB_DT_SS_HUB_SIZE ||
903 wValue != (USB_DT_SS_HUB << 8))) {
904 xhci_dbg(xhci, "Wrong hub descriptor type for "
905 "USB 3.0 roothub.\n");
906 goto error;
907 }
908 xhci_hub_descriptor(hcd, xhci,
909 (struct usb_hub_descriptor *) buf);
910 break;
911 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
912 if ((wValue & 0xff00) != (USB_DT_BOS << 8))
913 goto error;
914
915 if (hcd->speed < HCD_USB3)
916 goto error;
917
918 retval = xhci_create_usb3_bos_desc(xhci, buf, wLength);
919 spin_unlock_irqrestore(&xhci->lock, flags);
920 return retval;
921 case GetPortStatus:
922 if (!wIndex || wIndex > max_ports)
923 goto error;
924 wIndex--;
925 temp = readl(port_array[wIndex]);
926 if (temp == 0xffffffff) {
927 retval = -ENODEV;
928 break;
929 }
930 status = xhci_get_port_status(hcd, bus_state, port_array,
931 wIndex, temp, flags);
932 if (status == 0xffffffff)
933 goto error;
934
935 xhci_dbg(xhci, "get port status, actual port %d status = 0x%x\n",
936 wIndex, temp);
937 xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
938
939 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
940 /* if USB 3.1 extended port status return additional 4 bytes */
941 if (wValue == 0x02) {
942 u32 port_li;
943
944 if (hcd->speed < HCD_USB31 || wLength != 8) {
945 xhci_err(xhci, "get ext port status invalid parameter\n");
946 retval = -EINVAL;
947 break;
948 }
949 port_li = readl(port_array[wIndex] + PORTLI);
950 status = xhci_get_ext_port_status(temp, port_li);
951 put_unaligned_le32(cpu_to_le32(status), &buf[4]);
952 }
953 break;
954 case SetPortFeature:
955 if (wValue == USB_PORT_FEAT_LINK_STATE)
956 link_state = (wIndex & 0xff00) >> 3;
957 if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
958 wake_mask = wIndex & 0xff00;
959 /* The MSB of wIndex is the U1/U2 timeout */
960 timeout = (wIndex & 0xff00) >> 8;
961 wIndex &= 0xff;
962 if (!wIndex || wIndex > max_ports)
963 goto error;
964 wIndex--;
965 temp = readl(port_array[wIndex]);
966 if (temp == 0xffffffff) {
967 retval = -ENODEV;
968 break;
969 }
970 temp = xhci_port_state_to_neutral(temp);
971 /* FIXME: What new port features do we need to support? */
972 switch (wValue) {
973 case USB_PORT_FEAT_SUSPEND:
974 temp = readl(port_array[wIndex]);
975 if ((temp & PORT_PLS_MASK) != XDEV_U0) {
976 /* Resume the port to U0 first */
977 xhci_set_link_state(xhci, port_array, wIndex,
978 XDEV_U0);
979 spin_unlock_irqrestore(&xhci->lock, flags);
980 msleep(10);
981 spin_lock_irqsave(&xhci->lock, flags);
982 }
983 /* In spec software should not attempt to suspend
984 * a port unless the port reports that it is in the
985 * enabled (PED = ‘1’,PLS < ‘3’) state.
986 */
987 temp = readl(port_array[wIndex]);
988 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
989 || (temp & PORT_PLS_MASK) >= XDEV_U3) {
990 xhci_warn(xhci, "USB core suspending device "
991 "not in U0/U1/U2.\n");
992 goto error;
993 }
994
995 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
996 wIndex + 1);
997 if (!slot_id) {
998 xhci_warn(xhci, "slot_id is zero\n");
999 goto error;
1000 }
1001 /* unlock to execute stop endpoint commands */
1002 spin_unlock_irqrestore(&xhci->lock, flags);
1003 xhci_stop_device(xhci, slot_id, 1);
1004 spin_lock_irqsave(&xhci->lock, flags);
1005
1006 xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);
1007
1008 spin_unlock_irqrestore(&xhci->lock, flags);
1009 msleep(10); /* wait device to enter */
1010 spin_lock_irqsave(&xhci->lock, flags);
1011
1012 temp = readl(port_array[wIndex]);
1013 bus_state->suspended_ports |= 1 << wIndex;
1014 break;
1015 case USB_PORT_FEAT_LINK_STATE:
1016 temp = readl(port_array[wIndex]);
1017
1018 /* Disable port */
1019 if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
1020 xhci_dbg(xhci, "Disable port %d\n", wIndex);
1021 temp = xhci_port_state_to_neutral(temp);
1022 /*
1023 * Clear all change bits, so that we get a new
1024 * connection event.
1025 */
1026 temp |= PORT_CSC | PORT_PEC | PORT_WRC |
1027 PORT_OCC | PORT_RC | PORT_PLC |
1028 PORT_CEC;
1029 writel(temp | PORT_PE, port_array[wIndex]);
1030 temp = readl(port_array[wIndex]);
1031 break;
1032 }
1033
1034 /* Put link in RxDetect (enable port) */
1035 if (link_state == USB_SS_PORT_LS_RX_DETECT) {
1036 xhci_dbg(xhci, "Enable port %d\n", wIndex);
1037 xhci_set_link_state(xhci, port_array, wIndex,
1038 link_state);
1039 temp = readl(port_array[wIndex]);
1040 break;
1041 }
1042
1043 /* Software should not attempt to set
1044 * port link state above '3' (U3) and the port
1045 * must be enabled.
1046 */
1047 if ((temp & PORT_PE) == 0 ||
1048 (link_state > USB_SS_PORT_LS_U3)) {
1049 xhci_warn(xhci, "Cannot set link state.\n");
1050 goto error;
1051 }
1052
1053 if (link_state == USB_SS_PORT_LS_U3) {
1054 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1055 wIndex + 1);
1056 if (slot_id) {
1057 /* unlock to execute stop endpoint
1058 * commands */
1059 spin_unlock_irqrestore(&xhci->lock,
1060 flags);
1061 xhci_stop_device(xhci, slot_id, 1);
1062 spin_lock_irqsave(&xhci->lock, flags);
1063 }
1064 }
1065
1066 xhci_set_link_state(xhci, port_array, wIndex,
1067 link_state);
1068
1069 spin_unlock_irqrestore(&xhci->lock, flags);
1070 msleep(20); /* wait device to enter */
1071 spin_lock_irqsave(&xhci->lock, flags);
1072
1073 temp = readl(port_array[wIndex]);
1074 if (link_state == USB_SS_PORT_LS_U3)
1075 bus_state->suspended_ports |= 1 << wIndex;
1076 break;
1077 case USB_PORT_FEAT_POWER:
1078 /*
1079 * Turn on ports, even if there isn't per-port switching.
1080 * HC will report connect events even before this is set.
1081 * However, hub_wq will ignore the roothub events until
1082 * the roothub is registered.
1083 */
1084 writel(temp | PORT_POWER, port_array[wIndex]);
1085
1086 temp = readl(port_array[wIndex]);
1087 xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", wIndex, temp);
1088
1089 spin_unlock_irqrestore(&xhci->lock, flags);
1090 temp = usb_acpi_power_manageable(hcd->self.root_hub,
1091 wIndex);
1092 if (temp)
1093 usb_acpi_set_power_state(hcd->self.root_hub,
1094 wIndex, true);
1095 spin_lock_irqsave(&xhci->lock, flags);
1096 break;
1097 case USB_PORT_FEAT_RESET:
1098 temp = (temp | PORT_RESET);
1099 writel(temp, port_array[wIndex]);
1100
1101 temp = readl(port_array[wIndex]);
1102 xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp);
1103 break;
1104 case USB_PORT_FEAT_REMOTE_WAKE_MASK:
1105 xhci_set_remote_wake_mask(xhci, port_array,
1106 wIndex, wake_mask);
1107 temp = readl(port_array[wIndex]);
1108 xhci_dbg(xhci, "set port remote wake mask, "
1109 "actual port %d status = 0x%x\n",
1110 wIndex, temp);
1111 break;
1112 case USB_PORT_FEAT_BH_PORT_RESET:
1113 temp |= PORT_WR;
1114 writel(temp, port_array[wIndex]);
1115
1116 temp = readl(port_array[wIndex]);
1117 break;
1118 case USB_PORT_FEAT_U1_TIMEOUT:
1119 if (hcd->speed < HCD_USB3)
1120 goto error;
1121 temp = readl(port_array[wIndex] + PORTPMSC);
1122 temp &= ~PORT_U1_TIMEOUT_MASK;
1123 temp |= PORT_U1_TIMEOUT(timeout);
1124 writel(temp, port_array[wIndex] + PORTPMSC);
1125 break;
1126 case USB_PORT_FEAT_U2_TIMEOUT:
1127 if (hcd->speed < HCD_USB3)
1128 goto error;
1129 temp = readl(port_array[wIndex] + PORTPMSC);
1130 temp &= ~PORT_U2_TIMEOUT_MASK;
1131 temp |= PORT_U2_TIMEOUT(timeout);
1132 writel(temp, port_array[wIndex] + PORTPMSC);
1133 break;
1134 default:
1135 goto error;
1136 }
1137 /* unblock any posted writes */
1138 temp = readl(port_array[wIndex]);
1139 break;
1140 case ClearPortFeature:
1141 if (!wIndex || wIndex > max_ports)
1142 goto error;
1143 wIndex--;
1144 temp = readl(port_array[wIndex]);
1145 if (temp == 0xffffffff) {
1146 retval = -ENODEV;
1147 break;
1148 }
1149 /* FIXME: What new port features do we need to support? */
1150 temp = xhci_port_state_to_neutral(temp);
1151 switch (wValue) {
1152 case USB_PORT_FEAT_SUSPEND:
1153 temp = readl(port_array[wIndex]);
1154 xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
1155 xhci_dbg(xhci, "PORTSC %04x\n", temp);
1156 if (temp & PORT_RESET)
1157 goto error;
1158 if ((temp & PORT_PLS_MASK) == XDEV_U3) {
1159 if ((temp & PORT_PE) == 0)
1160 goto error;
1161
1162 set_bit(wIndex, &bus_state->resuming_ports);
1163 xhci_set_link_state(xhci, port_array, wIndex,
1164 XDEV_RESUME);
1165 spin_unlock_irqrestore(&xhci->lock, flags);
1166 msleep(20);
1167 spin_lock_irqsave(&xhci->lock, flags);
1168 xhci_set_link_state(xhci, port_array, wIndex,
1169 XDEV_U0);
1170 clear_bit(wIndex, &bus_state->resuming_ports);
1171 }
1172 bus_state->port_c_suspend |= 1 << wIndex;
1173
1174 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1175 wIndex + 1);
1176 if (!slot_id) {
1177 xhci_dbg(xhci, "slot_id is zero\n");
1178 goto error;
1179 }
1180 xhci_ring_device(xhci, slot_id);
1181 break;
1182 case USB_PORT_FEAT_C_SUSPEND:
1183 bus_state->port_c_suspend &= ~(1 << wIndex);
1184 case USB_PORT_FEAT_C_RESET:
1185 case USB_PORT_FEAT_C_BH_PORT_RESET:
1186 case USB_PORT_FEAT_C_CONNECTION:
1187 case USB_PORT_FEAT_C_OVER_CURRENT:
1188 case USB_PORT_FEAT_C_ENABLE:
1189 case USB_PORT_FEAT_C_PORT_LINK_STATE:
1190 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
1191 xhci_clear_port_change_bit(xhci, wValue, wIndex,
1192 port_array[wIndex], temp);
1193 break;
1194 case USB_PORT_FEAT_ENABLE:
1195 xhci_disable_port(hcd, xhci, wIndex,
1196 port_array[wIndex], temp);
1197 break;
1198 case USB_PORT_FEAT_POWER:
1199 writel(temp & ~PORT_POWER, port_array[wIndex]);
1200
1201 spin_unlock_irqrestore(&xhci->lock, flags);
1202 temp = usb_acpi_power_manageable(hcd->self.root_hub,
1203 wIndex);
1204 if (temp)
1205 usb_acpi_set_power_state(hcd->self.root_hub,
1206 wIndex, false);
1207 spin_lock_irqsave(&xhci->lock, flags);
1208 break;
1209 default:
1210 goto error;
1211 }
1212 break;
1213 default:
1214error:
1215 /* "stall" on error */
1216 retval = -EPIPE;
1217 }
1218 spin_unlock_irqrestore(&xhci->lock, flags);
1219 return retval;
1220}
1221
1222/*
1223 * Returns 0 if the status hasn't changed, or the number of bytes in buf.
1224 * Ports are 0-indexed from the HCD point of view,
1225 * and 1-indexed from the USB core pointer of view.
1226 *
1227 * Note that the status change bits will be cleared as soon as a port status
1228 * change event is generated, so we use the saved status from that event.
1229 */
1230int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
1231{
1232 unsigned long flags;
1233 u32 temp, status;
1234 u32 mask;
1235 int i, retval;
1236 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1237 int max_ports;
1238 __le32 __iomem **port_array;
1239 struct xhci_bus_state *bus_state;
1240 bool reset_change = false;
1241
1242 max_ports = xhci_get_ports(hcd, &port_array);
1243 bus_state = &xhci->bus_state[hcd_index(hcd)];
1244
1245 /* Initial status is no changes */
1246 retval = (max_ports + 8) / 8;
1247 memset(buf, 0, retval);
1248
1249 /*
1250 * Inform the usbcore about resume-in-progress by returning
1251 * a non-zero value even if there are no status changes.
1252 */
1253 status = bus_state->resuming_ports;
1254
1255 mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC | PORT_CEC;
1256
1257 spin_lock_irqsave(&xhci->lock, flags);
1258 /* For each port, did anything change? If so, set that bit in buf. */
1259 for (i = 0; i < max_ports; i++) {
1260 temp = readl(port_array[i]);
1261 if (temp == 0xffffffff) {
1262 retval = -ENODEV;
1263 break;
1264 }
1265 if ((temp & mask) != 0 ||
1266 (bus_state->port_c_suspend & 1 << i) ||
1267 (bus_state->resume_done[i] && time_after_eq(
1268 jiffies, bus_state->resume_done[i]))) {
1269 buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
1270 status = 1;
1271 }
1272 if ((temp & PORT_RC))
1273 reset_change = true;
1274 }
1275 if (!status && !reset_change) {
1276 xhci_dbg(xhci, "%s: stopping port polling.\n", __func__);
1277 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
1278 }
1279 spin_unlock_irqrestore(&xhci->lock, flags);
1280 return status ? retval : 0;
1281}
1282
1283#ifdef CONFIG_PM
1284
1285int xhci_bus_suspend(struct usb_hcd *hcd)
1286{
1287 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1288 int max_ports, port_index;
1289 __le32 __iomem **port_array;
1290 struct xhci_bus_state *bus_state;
1291 unsigned long flags;
1292
1293 max_ports = xhci_get_ports(hcd, &port_array);
1294 bus_state = &xhci->bus_state[hcd_index(hcd)];
1295
1296 spin_lock_irqsave(&xhci->lock, flags);
1297
1298 if (hcd->self.root_hub->do_remote_wakeup) {
1299 if (bus_state->resuming_ports || /* USB2 */
1300 bus_state->port_remote_wakeup) { /* USB3 */
1301 spin_unlock_irqrestore(&xhci->lock, flags);
1302 xhci_dbg(xhci, "suspend failed because a port is resuming\n");
1303 return -EBUSY;
1304 }
1305 }
1306
1307 port_index = max_ports;
1308 bus_state->bus_suspended = 0;
1309 while (port_index--) {
1310 /* suspend the port if the port is not suspended */
1311 u32 t1, t2;
1312 int slot_id;
1313
1314 t1 = readl(port_array[port_index]);
1315 t2 = xhci_port_state_to_neutral(t1);
1316
1317 if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
1318 xhci_dbg(xhci, "port %d not suspended\n", port_index);
1319 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1320 port_index + 1);
1321 if (slot_id) {
1322 spin_unlock_irqrestore(&xhci->lock, flags);
1323 xhci_stop_device(xhci, slot_id, 1);
1324 spin_lock_irqsave(&xhci->lock, flags);
1325 }
1326 t2 &= ~PORT_PLS_MASK;
1327 t2 |= PORT_LINK_STROBE | XDEV_U3;
1328 set_bit(port_index, &bus_state->bus_suspended);
1329 }
1330 /* USB core sets remote wake mask for USB 3.0 hubs,
1331 * including the USB 3.0 roothub, but only if CONFIG_PM
1332 * is enabled, so also enable remote wake here.
1333 */
1334 if (hcd->self.root_hub->do_remote_wakeup) {
1335 if (t1 & PORT_CONNECT) {
1336 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
1337 t2 &= ~PORT_WKCONN_E;
1338 } else {
1339 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
1340 t2 &= ~PORT_WKDISC_E;
1341 }
1342 } else
1343 t2 &= ~PORT_WAKE_BITS;
1344
1345 t1 = xhci_port_state_to_neutral(t1);
1346 if (t1 != t2)
1347 writel(t2, port_array[port_index]);
1348 }
1349 hcd->state = HC_STATE_SUSPENDED;
1350 bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
1351 spin_unlock_irqrestore(&xhci->lock, flags);
1352 return 0;
1353}
1354
1355int xhci_bus_resume(struct usb_hcd *hcd)
1356{
1357 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1358 int max_ports, port_index;
1359 __le32 __iomem **port_array;
1360 struct xhci_bus_state *bus_state;
1361 u32 temp;
1362 unsigned long flags;
1363 unsigned long port_was_suspended = 0;
1364 bool need_usb2_u3_exit = false;
1365 int slot_id;
1366 int sret;
1367
1368 max_ports = xhci_get_ports(hcd, &port_array);
1369 bus_state = &xhci->bus_state[hcd_index(hcd)];
1370
1371 if (time_before(jiffies, bus_state->next_statechange))
1372 msleep(5);
1373
1374 spin_lock_irqsave(&xhci->lock, flags);
1375 if (!HCD_HW_ACCESSIBLE(hcd)) {
1376 spin_unlock_irqrestore(&xhci->lock, flags);
1377 return -ESHUTDOWN;
1378 }
1379
1380 /* delay the irqs */
1381 temp = readl(&xhci->op_regs->command);
1382 temp &= ~CMD_EIE;
1383 writel(temp, &xhci->op_regs->command);
1384
1385 port_index = max_ports;
1386 while (port_index--) {
1387 /* Check whether need resume ports. If needed
1388 resume port and disable remote wakeup */
1389 u32 temp;
1390
1391 temp = readl(port_array[port_index]);
1392 if (DEV_SUPERSPEED_ANY(temp))
1393 temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
1394 else
1395 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
1396 if (test_bit(port_index, &bus_state->bus_suspended) &&
1397 (temp & PORT_PLS_MASK)) {
1398 set_bit(port_index, &port_was_suspended);
1399 if (!DEV_SUPERSPEED_ANY(temp)) {
1400 xhci_set_link_state(xhci, port_array,
1401 port_index, XDEV_RESUME);
1402 need_usb2_u3_exit = true;
1403 }
1404 } else
1405 writel(temp, port_array[port_index]);
1406 }
1407
1408 if (need_usb2_u3_exit) {
1409 spin_unlock_irqrestore(&xhci->lock, flags);
1410 msleep(20);
1411 spin_lock_irqsave(&xhci->lock, flags);
1412 }
1413
1414 port_index = max_ports;
1415 while (port_index--) {
1416 if (!(port_was_suspended & BIT(port_index)))
1417 continue;
1418 /* Clear PLC to poll it later after XDEV_U0 */
1419 xhci_test_and_clear_bit(xhci, port_array, port_index, PORT_PLC);
1420 xhci_set_link_state(xhci, port_array, port_index, XDEV_U0);
1421 }
1422
1423 port_index = max_ports;
1424 while (port_index--) {
1425 if (!(port_was_suspended & BIT(port_index)))
1426 continue;
1427 /* Poll and Clear PLC */
1428 sret = xhci_handshake(port_array[port_index], PORT_PLC,
1429 PORT_PLC, 10 * 1000);
1430 if (sret)
1431 xhci_warn(xhci, "port %d resume PLC timeout\n",
1432 port_index);
1433 xhci_test_and_clear_bit(xhci, port_array, port_index, PORT_PLC);
1434 slot_id = xhci_find_slot_id_by_port(hcd, xhci, port_index + 1);
1435 if (slot_id)
1436 xhci_ring_device(xhci, slot_id);
1437 }
1438
1439 (void) readl(&xhci->op_regs->command);
1440
1441 bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
1442 /* re-enable irqs */
1443 temp = readl(&xhci->op_regs->command);
1444 temp |= CMD_EIE;
1445 writel(temp, &xhci->op_regs->command);
1446 temp = readl(&xhci->op_regs->command);
1447
1448 spin_unlock_irqrestore(&xhci->lock, flags);
1449 return 0;
1450}
1451
1452#endif /* CONFIG_PM */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * xHCI host controller driver
4 *
5 * Copyright (C) 2008 Intel Corp.
6 *
7 * Author: Sarah Sharp
8 * Some code borrowed from the Linux EHCI driver.
9 */
10
11
12#include <linux/slab.h>
13#include <asm/unaligned.h>
14#include <linux/bitfield.h>
15
16#include "xhci.h"
17#include "xhci-trace.h"
18
19#define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E)
20#define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \
21 PORT_RC | PORT_PLC | PORT_PE)
22
23/* Default sublink speed attribute of each lane */
24static u32 ssp_cap_default_ssa[] = {
25 0x00050034, /* USB 3.0 SS Gen1x1 id:4 symmetric rx 5Gbps */
26 0x000500b4, /* USB 3.0 SS Gen1x1 id:4 symmetric tx 5Gbps */
27 0x000a4035, /* USB 3.1 SSP Gen2x1 id:5 symmetric rx 10Gbps */
28 0x000a40b5, /* USB 3.1 SSP Gen2x1 id:5 symmetric tx 10Gbps */
29 0x00054036, /* USB 3.2 SSP Gen1x2 id:6 symmetric rx 5Gbps */
30 0x000540b6, /* USB 3.2 SSP Gen1x2 id:6 symmetric tx 5Gbps */
31 0x000a4037, /* USB 3.2 SSP Gen2x2 id:7 symmetric rx 10Gbps */
32 0x000a40b7, /* USB 3.2 SSP Gen2x2 id:7 symmetric tx 10Gbps */
33};
34
35static int xhci_create_usb3x_bos_desc(struct xhci_hcd *xhci, char *buf,
36 u16 wLength)
37{
38 struct usb_bos_descriptor *bos;
39 struct usb_ss_cap_descriptor *ss_cap;
40 struct usb_ssp_cap_descriptor *ssp_cap;
41 struct xhci_port_cap *port_cap = NULL;
42 u16 bcdUSB;
43 u32 reg;
44 u32 min_rate = 0;
45 u8 min_ssid;
46 u8 ssac;
47 u8 ssic;
48 int offset;
49 int i;
50
51 /* BOS descriptor */
52 bos = (struct usb_bos_descriptor *)buf;
53 bos->bLength = USB_DT_BOS_SIZE;
54 bos->bDescriptorType = USB_DT_BOS;
55 bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE +
56 USB_DT_USB_SS_CAP_SIZE);
57 bos->bNumDeviceCaps = 1;
58
59 /* Create the descriptor for port with the highest revision */
60 for (i = 0; i < xhci->num_port_caps; i++) {
61 u8 major = xhci->port_caps[i].maj_rev;
62 u8 minor = xhci->port_caps[i].min_rev;
63 u16 rev = (major << 8) | minor;
64
65 if (i == 0 || bcdUSB < rev) {
66 bcdUSB = rev;
67 port_cap = &xhci->port_caps[i];
68 }
69 }
70
71 if (bcdUSB >= 0x0310) {
72 if (port_cap->psi_count) {
73 u8 num_sym_ssa = 0;
74
75 for (i = 0; i < port_cap->psi_count; i++) {
76 if ((port_cap->psi[i] & PLT_MASK) == PLT_SYM)
77 num_sym_ssa++;
78 }
79
80 ssac = port_cap->psi_count + num_sym_ssa - 1;
81 ssic = port_cap->psi_uid_count - 1;
82 } else {
83 if (bcdUSB >= 0x0320)
84 ssac = 7;
85 else
86 ssac = 3;
87
88 ssic = (ssac + 1) / 2 - 1;
89 }
90
91 bos->bNumDeviceCaps++;
92 bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE +
93 USB_DT_USB_SS_CAP_SIZE +
94 USB_DT_USB_SSP_CAP_SIZE(ssac));
95 }
96
97 if (wLength < USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE)
98 return wLength;
99
100 /* SuperSpeed USB Device Capability */
101 ss_cap = (struct usb_ss_cap_descriptor *)&buf[USB_DT_BOS_SIZE];
102 ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE;
103 ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
104 ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE;
105 ss_cap->bmAttributes = 0; /* set later */
106 ss_cap->wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION);
107 ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
108 ss_cap->bU1devExitLat = 0; /* set later */
109 ss_cap->bU2DevExitLat = 0; /* set later */
110
111 reg = readl(&xhci->cap_regs->hcc_params);
112 if (HCC_LTC(reg))
113 ss_cap->bmAttributes |= USB_LTM_SUPPORT;
114
115 if ((xhci->quirks & XHCI_LPM_SUPPORT)) {
116 reg = readl(&xhci->cap_regs->hcs_params3);
117 ss_cap->bU1devExitLat = HCS_U1_LATENCY(reg);
118 ss_cap->bU2DevExitLat = cpu_to_le16(HCS_U2_LATENCY(reg));
119 }
120
121 if (wLength < le16_to_cpu(bos->wTotalLength))
122 return wLength;
123
124 if (bcdUSB < 0x0310)
125 return le16_to_cpu(bos->wTotalLength);
126
127 ssp_cap = (struct usb_ssp_cap_descriptor *)&buf[USB_DT_BOS_SIZE +
128 USB_DT_USB_SS_CAP_SIZE];
129 ssp_cap->bLength = USB_DT_USB_SSP_CAP_SIZE(ssac);
130 ssp_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
131 ssp_cap->bDevCapabilityType = USB_SSP_CAP_TYPE;
132 ssp_cap->bReserved = 0;
133 ssp_cap->wReserved = 0;
134 ssp_cap->bmAttributes =
135 cpu_to_le32(FIELD_PREP(USB_SSP_SUBLINK_SPEED_ATTRIBS, ssac) |
136 FIELD_PREP(USB_SSP_SUBLINK_SPEED_IDS, ssic));
137
138 if (!port_cap->psi_count) {
139 for (i = 0; i < ssac + 1; i++)
140 ssp_cap->bmSublinkSpeedAttr[i] =
141 cpu_to_le32(ssp_cap_default_ssa[i]);
142
143 min_ssid = 4;
144 goto out;
145 }
146
147 offset = 0;
148 for (i = 0; i < port_cap->psi_count; i++) {
149 u32 psi;
150 u32 attr;
151 u8 ssid;
152 u8 lp;
153 u8 lse;
154 u8 psie;
155 u16 lane_mantissa;
156 u16 psim;
157 u16 plt;
158
159 psi = port_cap->psi[i];
160 ssid = XHCI_EXT_PORT_PSIV(psi);
161 lp = XHCI_EXT_PORT_LP(psi);
162 psie = XHCI_EXT_PORT_PSIE(psi);
163 psim = XHCI_EXT_PORT_PSIM(psi);
164 plt = psi & PLT_MASK;
165
166 lse = psie;
167 lane_mantissa = psim;
168
169 /* Shift to Gbps and set SSP Link Protocol if 10Gpbs */
170 for (; psie < USB_SSP_SUBLINK_SPEED_LSE_GBPS; psie++)
171 psim /= 1000;
172
173 if (!min_rate || psim < min_rate) {
174 min_ssid = ssid;
175 min_rate = psim;
176 }
177
178 /* Some host controllers don't set the link protocol for SSP */
179 if (psim >= 10)
180 lp = USB_SSP_SUBLINK_SPEED_LP_SSP;
181
182 /*
183 * PSIM and PSIE represent the total speed of PSI. The BOS
184 * descriptor SSP sublink speed attribute lane mantissa
185 * describes the lane speed. E.g. PSIM and PSIE for gen2x2
186 * is 20Gbps, but the BOS descriptor lane speed mantissa is
187 * 10Gbps. Check and modify the mantissa value to match the
188 * lane speed.
189 */
190 if (bcdUSB == 0x0320 && plt == PLT_SYM) {
191 /*
192 * The PSI dword for gen1x2 and gen2x1 share the same
193 * values. But the lane speed for gen1x2 is 5Gbps while
194 * gen2x1 is 10Gbps. If the previous PSI dword SSID is
195 * 5 and the PSIE and PSIM match with SSID 6, let's
196 * assume that the controller follows the default speed
197 * id with SSID 6 for gen1x2.
198 */
199 if (ssid == 6 && psie == 3 && psim == 10 && i) {
200 u32 prev = port_cap->psi[i - 1];
201
202 if ((prev & PLT_MASK) == PLT_SYM &&
203 XHCI_EXT_PORT_PSIV(prev) == 5 &&
204 XHCI_EXT_PORT_PSIE(prev) == 3 &&
205 XHCI_EXT_PORT_PSIM(prev) == 10) {
206 lse = USB_SSP_SUBLINK_SPEED_LSE_GBPS;
207 lane_mantissa = 5;
208 }
209 }
210
211 if (psie == 3 && psim > 10) {
212 lse = USB_SSP_SUBLINK_SPEED_LSE_GBPS;
213 lane_mantissa = 10;
214 }
215 }
216
217 attr = (FIELD_PREP(USB_SSP_SUBLINK_SPEED_SSID, ssid) |
218 FIELD_PREP(USB_SSP_SUBLINK_SPEED_LP, lp) |
219 FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSE, lse) |
220 FIELD_PREP(USB_SSP_SUBLINK_SPEED_LSM, lane_mantissa));
221
222 switch (plt) {
223 case PLT_SYM:
224 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST,
225 USB_SSP_SUBLINK_SPEED_ST_SYM_RX);
226 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr);
227
228 attr &= ~USB_SSP_SUBLINK_SPEED_ST;
229 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST,
230 USB_SSP_SUBLINK_SPEED_ST_SYM_TX);
231 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr);
232 break;
233 case PLT_ASYM_RX:
234 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST,
235 USB_SSP_SUBLINK_SPEED_ST_ASYM_RX);
236 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr);
237 break;
238 case PLT_ASYM_TX:
239 attr |= FIELD_PREP(USB_SSP_SUBLINK_SPEED_ST,
240 USB_SSP_SUBLINK_SPEED_ST_ASYM_TX);
241 ssp_cap->bmSublinkSpeedAttr[offset++] = cpu_to_le32(attr);
242 break;
243 }
244 }
245out:
246 ssp_cap->wFunctionalitySupport =
247 cpu_to_le16(FIELD_PREP(USB_SSP_MIN_SUBLINK_SPEED_ATTRIBUTE_ID,
248 min_ssid) |
249 FIELD_PREP(USB_SSP_MIN_RX_LANE_COUNT, 1) |
250 FIELD_PREP(USB_SSP_MIN_TX_LANE_COUNT, 1));
251
252 return le16_to_cpu(bos->wTotalLength);
253}
254
255static void xhci_common_hub_descriptor(struct xhci_hcd *xhci,
256 struct usb_hub_descriptor *desc, int ports)
257{
258 u16 temp;
259
260 desc->bHubContrCurrent = 0;
261
262 desc->bNbrPorts = ports;
263 temp = 0;
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;
267 else
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);
275}
276
277/* Fill in the USB 2.0 roothub descriptor */
278static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
279 struct usb_hub_descriptor *desc)
280{
281 int ports;
282 u16 temp;
283 __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8];
284 u32 portsc;
285 unsigned int i;
286 struct xhci_hub *rhub;
287
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 */
295
296 /* The Device Removable bits are reported on a byte granularity.
297 * If the port doesn't exist within that byte, the bit is set to 0.
298 */
299 memset(port_removable, 0, sizeof(port_removable));
300 for (i = 0; i < ports; i++) {
301 portsc = readl(rhub->ports[i]->addr);
302 /* If a device is removable, PORTSC reports a 0, same as in the
303 * hub descriptor DeviceRemovable bits.
304 */
305 if (portsc & PORT_DEV_REMOVE)
306 /* This math is hairy because bit 0 of DeviceRemovable
307 * is reserved, and bit 1 is for port 1, etc.
308 */
309 port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8);
310 }
311
312 /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN
313 * ports on it. The USB 2.0 specification says that there are two
314 * variable length fields at the end of the hub descriptor:
315 * DeviceRemovable and PortPwrCtrlMask. But since we can have less than
316 * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array
317 * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to
318 * 0xFF, so we initialize the both arrays (DeviceRemovable and
319 * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each
320 * set of ports that actually exist.
321 */
322 memset(desc->u.hs.DeviceRemovable, 0xff,
323 sizeof(desc->u.hs.DeviceRemovable));
324 memset(desc->u.hs.PortPwrCtrlMask, 0xff,
325 sizeof(desc->u.hs.PortPwrCtrlMask));
326
327 for (i = 0; i < (ports + 1 + 7) / 8; i++)
328 memset(&desc->u.hs.DeviceRemovable[i], port_removable[i],
329 sizeof(__u8));
330}
331
332/* Fill in the USB 3.0 roothub descriptor */
333static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
334 struct usb_hub_descriptor *desc)
335{
336 int ports;
337 u16 port_removable;
338 u32 portsc;
339 unsigned int i;
340 struct xhci_hub *rhub;
341
342 rhub = &xhci->usb3_rhub;
343 ports = rhub->num_ports;
344 xhci_common_hub_descriptor(xhci, desc, ports);
345 desc->bDescriptorType = USB_DT_SS_HUB;
346 desc->bDescLength = USB_DT_SS_HUB_SIZE;
347 desc->bPwrOn2PwrGood = 50; /* usb 3.1 may fail if less than 100ms */
348
349 /* header decode latency should be zero for roothubs,
350 * see section 4.23.5.2.
351 */
352 desc->u.ss.bHubHdrDecLat = 0;
353 desc->u.ss.wHubDelay = 0;
354
355 port_removable = 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);
361 }
362
363 desc->u.ss.DeviceRemovable = cpu_to_le16(port_removable);
364}
365
366static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
367 struct usb_hub_descriptor *desc)
368{
369
370 if (hcd->speed >= HCD_USB3)
371 xhci_usb3_hub_descriptor(hcd, xhci, desc);
372 else
373 xhci_usb2_hub_descriptor(hcd, xhci, desc);
374
375}
376
377static unsigned int xhci_port_speed(unsigned int port_status)
378{
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;
383 /*
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).
387 */
388 return 0;
389}
390
391/*
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.
397 */
398#define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30))
399/*
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
403 */
404#define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25))
405/*
406 * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
407 * bit 4 (port reset)
408 */
409#define XHCI_PORT_RW1S ((1<<4))
410/*
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
416 */
417#define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17))
418/*
419 * Bit 16 is RW, and writing a '1' to it causes the link state control to be
420 * latched in
421 */
422#define XHCI_PORT_RW ((1<<16))
423/*
424 * These bits are Reserved Zero (RsvdZ) and zero should be written to them:
425 * bits 2, 24, 28:31
426 */
427#define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28))
428
429/**
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
432 *
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
435 * control register.
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.
439 *
440 * Return: u32 value that can be written back to portsc register without
441 * changing port state.
442 */
443
444u32 xhci_port_state_to_neutral(u32 state)
445{
446 /* Save read-only status and port state */
447 return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS);
448}
449EXPORT_SYMBOL_GPL(xhci_port_state_to_neutral);
450
451/**
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.
456 *
457 * Return: Slot id of the usb device connected to the root port, 0 if not found
458 */
459
460int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
461 u16 port)
462{
463 int slot_id;
464 int i;
465 enum usb_device_speed speed;
466
467 slot_id = 0;
468 for (i = 0; i < MAX_HC_SLOTS; i++) {
469 if (!xhci->devs[i] || !xhci->devs[i]->udev)
470 continue;
471 speed = xhci->devs[i]->udev->speed;
472 if (((speed >= USB_SPEED_SUPER) == (hcd->speed >= HCD_USB3))
473 && xhci->devs[i]->fake_port == port) {
474 slot_id = i;
475 break;
476 }
477 }
478
479 return slot_id;
480}
481EXPORT_SYMBOL_GPL(xhci_find_slot_id_by_port);
482
483/*
484 * Stop device
485 * It issues stop endpoint command for EP 0 to 30. And wait the last command
486 * to complete.
487 * suspend will set to 1, if suspend bit need to set in command.
488 */
489static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
490{
491 struct xhci_virt_device *virt_dev;
492 struct xhci_command *cmd;
493 unsigned long flags;
494 int ret;
495 int i;
496
497 ret = 0;
498 virt_dev = xhci->devs[slot_id];
499 if (!virt_dev)
500 return -ENODEV;
501
502 trace_xhci_stop_device(virt_dev);
503
504 cmd = xhci_alloc_command(xhci, true, GFP_NOIO);
505 if (!cmd)
506 return -ENOMEM;
507
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;
513
514 ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->out_ctx, i);
515
516 /* Check ep is running, required by AMD SNPS 3.1 xHC */
517 if (GET_EP_CTX_STATE(ep_ctx) != EP_STATE_RUNNING)
518 continue;
519
520 command = xhci_alloc_command(xhci, false, GFP_NOWAIT);
521 if (!command) {
522 spin_unlock_irqrestore(&xhci->lock, flags);
523 ret = -ENOMEM;
524 goto cmd_cleanup;
525 }
526
527 ret = xhci_queue_stop_endpoint(xhci, command, slot_id,
528 i, suspend);
529 if (ret) {
530 spin_unlock_irqrestore(&xhci->lock, flags);
531 xhci_free_command(xhci, command);
532 goto cmd_cleanup;
533 }
534 }
535 }
536 ret = xhci_queue_stop_endpoint(xhci, cmd, slot_id, 0, suspend);
537 if (ret) {
538 spin_unlock_irqrestore(&xhci->lock, flags);
539 goto cmd_cleanup;
540 }
541
542 xhci_ring_cmd_db(xhci);
543 spin_unlock_irqrestore(&xhci->lock, flags);
544
545 /* Wait for last stop endpoint command to finish */
546 wait_for_completion(cmd->completion);
547
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");
551 ret = -ETIME;
552 }
553
554cmd_cleanup:
555 xhci_free_command(xhci, cmd);
556 return ret;
557}
558
559/*
560 * Ring device, it rings the all doorbells unconditionally.
561 */
562void xhci_ring_device(struct xhci_hcd *xhci, int slot_id)
563{
564 int i, s;
565 struct xhci_virt_ep *ep;
566
567 for (i = 0; i < LAST_EP_INDEX + 1; i++) {
568 ep = &xhci->devs[slot_id]->eps[i];
569
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);
575 }
576 }
577
578 return;
579}
580
581static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
582 u16 wIndex, __le32 __iomem *addr, u32 port_status)
583{
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");
588 return;
589 }
590
591 if (xhci->quirks & XHCI_BROKEN_PORT_PED) {
592 xhci_dbg(xhci,
593 "Broken Port Enabled/Disabled, ignoring port disable request.\n");
594 return;
595 }
596
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);
602}
603
604static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue,
605 u16 wIndex, __le32 __iomem *addr, u32 port_status)
606{
607 char *port_change_bit;
608 u32 status;
609
610 switch (wValue) {
611 case USB_PORT_FEAT_C_RESET:
612 status = PORT_RC;
613 port_change_bit = "reset";
614 break;
615 case USB_PORT_FEAT_C_BH_PORT_RESET:
616 status = PORT_WRC;
617 port_change_bit = "warm(BH) reset";
618 break;
619 case USB_PORT_FEAT_C_CONNECTION:
620 status = PORT_CSC;
621 port_change_bit = "connect";
622 break;
623 case USB_PORT_FEAT_C_OVER_CURRENT:
624 status = PORT_OCC;
625 port_change_bit = "over-current";
626 break;
627 case USB_PORT_FEAT_C_ENABLE:
628 status = PORT_PEC;
629 port_change_bit = "enable/disable";
630 break;
631 case USB_PORT_FEAT_C_SUSPEND:
632 status = PORT_PLC;
633 port_change_bit = "suspend/resume";
634 break;
635 case USB_PORT_FEAT_C_PORT_LINK_STATE:
636 status = PORT_PLC;
637 port_change_bit = "link state";
638 break;
639 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
640 status = PORT_CEC;
641 port_change_bit = "config error";
642 break;
643 default:
644 /* Should never happen */
645 return;
646 }
647 /* Change bits are all write 1 to clear */
648 writel(port_status | status, addr);
649 port_status = readl(addr);
650
651 xhci_dbg(xhci, "clear port%d %s change, portsc: 0x%x\n",
652 wIndex + 1, port_change_bit, port_status);
653}
654
655struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd)
656{
657 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
658
659 if (hcd->speed >= HCD_USB3)
660 return &xhci->usb3_rhub;
661 return &xhci->usb2_rhub;
662}
663
664/*
665 * xhci_set_port_power() must be called with xhci->lock held.
666 * It will release and re-aquire the lock while calling ACPI
667 * method.
668 */
669static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd,
670 u16 index, bool on, unsigned long *flags)
671 __must_hold(&xhci->lock)
672{
673 struct xhci_hub *rhub;
674 struct xhci_port *port;
675 u32 temp;
676
677 rhub = xhci_get_rhub(hcd);
678 port = rhub->ports[index];
679 temp = readl(port->addr);
680
681 xhci_dbg(xhci, "set port power %d-%d %s, portsc: 0x%x\n",
682 hcd->self.busnum, index + 1, on ? "ON" : "OFF", temp);
683
684 temp = xhci_port_state_to_neutral(temp);
685
686 if (on) {
687 /* Power on */
688 writel(temp | PORT_POWER, port->addr);
689 readl(port->addr);
690 } else {
691 /* Power off */
692 writel(temp & ~PORT_POWER, port->addr);
693 }
694
695 spin_unlock_irqrestore(&xhci->lock, *flags);
696 temp = usb_acpi_power_manageable(hcd->self.root_hub,
697 index);
698 if (temp)
699 usb_acpi_set_power_state(hcd->self.root_hub,
700 index, on);
701 spin_lock_irqsave(&xhci->lock, *flags);
702}
703
704static void xhci_port_set_test_mode(struct xhci_hcd *xhci,
705 u16 test_mode, u16 wIndex)
706{
707 u32 temp;
708 struct xhci_port *port;
709
710 /* xhci only supports test mode for usb2 ports */
711 port = xhci->usb2_rhub.ports[wIndex];
712 temp = readl(port->addr + PORTPMSC);
713 temp |= test_mode << PORT_TEST_MODE_SHIFT;
714 writel(temp, port->addr + PORTPMSC);
715 xhci->test_mode = test_mode;
716 if (test_mode == USB_TEST_FORCE_ENABLE)
717 xhci_start(xhci);
718}
719
720static int xhci_enter_test_mode(struct xhci_hcd *xhci,
721 u16 test_mode, u16 wIndex, unsigned long *flags)
722 __must_hold(&xhci->lock)
723{
724 struct usb_hcd *usb3_hcd = xhci_get_usb3_hcd(xhci);
725 int i, retval;
726
727 /* Disable all Device Slots */
728 xhci_dbg(xhci, "Disable all slots\n");
729 spin_unlock_irqrestore(&xhci->lock, *flags);
730 for (i = 1; i <= HCS_MAX_SLOTS(xhci->hcs_params1); i++) {
731 if (!xhci->devs[i])
732 continue;
733
734 retval = xhci_disable_slot(xhci, i);
735 xhci_free_virt_device(xhci, i);
736 if (retval)
737 xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n",
738 i, retval);
739 }
740 spin_lock_irqsave(&xhci->lock, *flags);
741 /* Put all ports to the Disable state by clear PP */
742 xhci_dbg(xhci, "Disable all port (PP = 0)\n");
743 /* Power off USB3 ports*/
744 for (i = 0; i < xhci->usb3_rhub.num_ports; i++)
745 xhci_set_port_power(xhci, usb3_hcd, i, false, flags);
746 /* Power off USB2 ports*/
747 for (i = 0; i < xhci->usb2_rhub.num_ports; i++)
748 xhci_set_port_power(xhci, xhci->main_hcd, i, false, flags);
749 /* Stop the controller */
750 xhci_dbg(xhci, "Stop controller\n");
751 retval = xhci_halt(xhci);
752 if (retval)
753 return retval;
754 /* Disable runtime PM for test mode */
755 pm_runtime_forbid(xhci_to_hcd(xhci)->self.controller);
756 /* Set PORTPMSC.PTC field to enter selected test mode */
757 /* Port is selected by wIndex. port_id = wIndex + 1 */
758 xhci_dbg(xhci, "Enter Test Mode: %d, Port_id=%d\n",
759 test_mode, wIndex + 1);
760 xhci_port_set_test_mode(xhci, test_mode, wIndex);
761 return retval;
762}
763
764static int xhci_exit_test_mode(struct xhci_hcd *xhci)
765{
766 int retval;
767
768 if (!xhci->test_mode) {
769 xhci_err(xhci, "Not in test mode, do nothing.\n");
770 return 0;
771 }
772 if (xhci->test_mode == USB_TEST_FORCE_ENABLE &&
773 !(xhci->xhc_state & XHCI_STATE_HALTED)) {
774 retval = xhci_halt(xhci);
775 if (retval)
776 return retval;
777 }
778 pm_runtime_allow(xhci_to_hcd(xhci)->self.controller);
779 xhci->test_mode = 0;
780 return xhci_reset(xhci, XHCI_RESET_SHORT_USEC);
781}
782
783void xhci_set_link_state(struct xhci_hcd *xhci, struct xhci_port *port,
784 u32 link_state)
785{
786 u32 temp;
787 u32 portsc;
788
789 portsc = readl(port->addr);
790 temp = xhci_port_state_to_neutral(portsc);
791 temp &= ~PORT_PLS_MASK;
792 temp |= PORT_LINK_STROBE | link_state;
793 writel(temp, port->addr);
794
795 xhci_dbg(xhci, "Set port %d-%d link state, portsc: 0x%x, write 0x%x",
796 port->rhub->hcd->self.busnum, port->hcd_portnum + 1,
797 portsc, temp);
798}
799
800static void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
801 struct xhci_port *port, u16 wake_mask)
802{
803 u32 temp;
804
805 temp = readl(port->addr);
806 temp = xhci_port_state_to_neutral(temp);
807
808 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT)
809 temp |= PORT_WKCONN_E;
810 else
811 temp &= ~PORT_WKCONN_E;
812
813 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT)
814 temp |= PORT_WKDISC_E;
815 else
816 temp &= ~PORT_WKDISC_E;
817
818 if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT)
819 temp |= PORT_WKOC_E;
820 else
821 temp &= ~PORT_WKOC_E;
822
823 writel(temp, port->addr);
824}
825
826/* Test and clear port RWC bit */
827void xhci_test_and_clear_bit(struct xhci_hcd *xhci, struct xhci_port *port,
828 u32 port_bit)
829{
830 u32 temp;
831
832 temp = readl(port->addr);
833 if (temp & port_bit) {
834 temp = xhci_port_state_to_neutral(temp);
835 temp |= port_bit;
836 writel(temp, port->addr);
837 }
838}
839
840/* Updates Link Status for super Speed port */
841static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci,
842 u32 *status, u32 status_reg)
843{
844 u32 pls = status_reg & PORT_PLS_MASK;
845
846 /* When the CAS bit is set then warm reset
847 * should be performed on port
848 */
849 if (status_reg & PORT_CAS) {
850 /* The CAS bit can be set while the port is
851 * in any link state.
852 * Only roothubs have CAS bit, so we
853 * pretend to be in compliance mode
854 * unless we're already in compliance
855 * or the inactive state.
856 */
857 if (pls != USB_SS_PORT_LS_COMP_MOD &&
858 pls != USB_SS_PORT_LS_SS_INACTIVE) {
859 pls = USB_SS_PORT_LS_COMP_MOD;
860 }
861 /* Return also connection bit -
862 * hub state machine resets port
863 * when this bit is set.
864 */
865 pls |= USB_PORT_STAT_CONNECTION;
866 } else {
867 /*
868 * Resume state is an xHCI internal state. Do not report it to
869 * usb core, instead, pretend to be U3, thus usb core knows
870 * it's not ready for transfer.
871 */
872 if (pls == XDEV_RESUME) {
873 *status |= USB_SS_PORT_LS_U3;
874 return;
875 }
876
877 /*
878 * If CAS bit isn't set but the Port is already at
879 * Compliance Mode, fake a connection so the USB core
880 * notices the Compliance state and resets the port.
881 * This resolves an issue generated by the SN65LVPE502CP
882 * in which sometimes the port enters compliance mode
883 * caused by a delay on the host-device negotiation.
884 */
885 if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
886 (pls == USB_SS_PORT_LS_COMP_MOD))
887 pls |= USB_PORT_STAT_CONNECTION;
888 }
889
890 /* update status field */
891 *status |= pls;
892}
893
894/*
895 * Function for Compliance Mode Quirk.
896 *
897 * This Function verifies if all xhc USB3 ports have entered U0, if so,
898 * the compliance mode timer is deleted. A port won't enter
899 * compliance mode if it has previously entered U0.
900 */
901static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status,
902 u16 wIndex)
903{
904 u32 all_ports_seen_u0 = ((1 << xhci->usb3_rhub.num_ports) - 1);
905 bool port_in_u0 = ((status & PORT_PLS_MASK) == XDEV_U0);
906
907 if (!(xhci->quirks & XHCI_COMP_MODE_QUIRK))
908 return;
909
910 if ((xhci->port_status_u0 != all_ports_seen_u0) && port_in_u0) {
911 xhci->port_status_u0 |= 1 << wIndex;
912 if (xhci->port_status_u0 == all_ports_seen_u0) {
913 del_timer_sync(&xhci->comp_mode_recovery_timer);
914 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
915 "All USB3 ports have entered U0 already!");
916 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
917 "Compliance Mode Recovery Timer Deleted.");
918 }
919 }
920}
921
922static int xhci_handle_usb2_port_link_resume(struct xhci_port *port,
923 u32 *status, u32 portsc,
924 unsigned long *flags)
925{
926 struct xhci_bus_state *bus_state;
927 struct xhci_hcd *xhci;
928 struct usb_hcd *hcd;
929 int slot_id;
930 u32 wIndex;
931
932 hcd = port->rhub->hcd;
933 bus_state = &port->rhub->bus_state;
934 xhci = hcd_to_xhci(hcd);
935 wIndex = port->hcd_portnum;
936
937 if ((portsc & PORT_RESET) || !(portsc & PORT_PE)) {
938 *status = 0xffffffff;
939 return -EINVAL;
940 }
941 /* did port event handler already start resume timing? */
942 if (!bus_state->resume_done[wIndex]) {
943 /* If not, maybe we are in a host initated resume? */
944 if (test_bit(wIndex, &bus_state->resuming_ports)) {
945 /* Host initated resume doesn't time the resume
946 * signalling using resume_done[].
947 * It manually sets RESUME state, sleeps 20ms
948 * and sets U0 state. This should probably be
949 * changed, but not right now.
950 */
951 } else {
952 /* port resume was discovered now and here,
953 * start resume timing
954 */
955 unsigned long timeout = jiffies +
956 msecs_to_jiffies(USB_RESUME_TIMEOUT);
957
958 set_bit(wIndex, &bus_state->resuming_ports);
959 bus_state->resume_done[wIndex] = timeout;
960 mod_timer(&hcd->rh_timer, timeout);
961 usb_hcd_start_port_resume(&hcd->self, wIndex);
962 }
963 /* Has resume been signalled for USB_RESUME_TIME yet? */
964 } else if (time_after_eq(jiffies, bus_state->resume_done[wIndex])) {
965 int time_left;
966
967 xhci_dbg(xhci, "resume USB2 port %d-%d\n",
968 hcd->self.busnum, wIndex + 1);
969
970 bus_state->resume_done[wIndex] = 0;
971 clear_bit(wIndex, &bus_state->resuming_ports);
972
973 set_bit(wIndex, &bus_state->rexit_ports);
974
975 xhci_test_and_clear_bit(xhci, port, PORT_PLC);
976 xhci_set_link_state(xhci, port, XDEV_U0);
977
978 spin_unlock_irqrestore(&xhci->lock, *flags);
979 time_left = wait_for_completion_timeout(
980 &bus_state->rexit_done[wIndex],
981 msecs_to_jiffies(XHCI_MAX_REXIT_TIMEOUT_MS));
982 spin_lock_irqsave(&xhci->lock, *flags);
983
984 if (time_left) {
985 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
986 wIndex + 1);
987 if (!slot_id) {
988 xhci_dbg(xhci, "slot_id is zero\n");
989 *status = 0xffffffff;
990 return -ENODEV;
991 }
992 xhci_ring_device(xhci, slot_id);
993 } else {
994 int port_status = readl(port->addr);
995
996 xhci_warn(xhci, "Port resume timed out, port %d-%d: 0x%x\n",
997 hcd->self.busnum, wIndex + 1, port_status);
998 *status |= USB_PORT_STAT_SUSPEND;
999 clear_bit(wIndex, &bus_state->rexit_ports);
1000 }
1001
1002 usb_hcd_end_port_resume(&hcd->self, wIndex);
1003 bus_state->port_c_suspend |= 1 << wIndex;
1004 bus_state->suspended_ports &= ~(1 << wIndex);
1005 } else {
1006 /*
1007 * The resume has been signaling for less than
1008 * USB_RESUME_TIME. Report the port status as SUSPEND,
1009 * let the usbcore check port status again and clear
1010 * resume signaling later.
1011 */
1012 *status |= USB_PORT_STAT_SUSPEND;
1013 }
1014 return 0;
1015}
1016
1017static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li)
1018{
1019 u32 ext_stat = 0;
1020 int speed_id;
1021
1022 /* only support rx and tx lane counts of 1 in usb3.1 spec */
1023 speed_id = DEV_PORT_SPEED(raw_port_status);
1024 ext_stat |= speed_id; /* bits 3:0, RX speed id */
1025 ext_stat |= speed_id << 4; /* bits 7:4, TX speed id */
1026
1027 ext_stat |= PORT_RX_LANES(port_li) << 8; /* bits 11:8 Rx lane count */
1028 ext_stat |= PORT_TX_LANES(port_li) << 12; /* bits 15:12 Tx lane count */
1029
1030 return ext_stat;
1031}
1032
1033static void xhci_get_usb3_port_status(struct xhci_port *port, u32 *status,
1034 u32 portsc)
1035{
1036 struct xhci_bus_state *bus_state;
1037 struct xhci_hcd *xhci;
1038 struct usb_hcd *hcd;
1039 u32 link_state;
1040 u32 portnum;
1041
1042 bus_state = &port->rhub->bus_state;
1043 xhci = hcd_to_xhci(port->rhub->hcd);
1044 hcd = port->rhub->hcd;
1045 link_state = portsc & PORT_PLS_MASK;
1046 portnum = port->hcd_portnum;
1047
1048 /* USB3 specific wPortChange bits
1049 *
1050 * Port link change with port in resume state should not be
1051 * reported to usbcore, as this is an internal state to be
1052 * handled by xhci driver. Reporting PLC to usbcore may
1053 * cause usbcore clearing PLC first and port change event
1054 * irq won't be generated.
1055 */
1056
1057 if (portsc & PORT_PLC && (link_state != XDEV_RESUME))
1058 *status |= USB_PORT_STAT_C_LINK_STATE << 16;
1059 if (portsc & PORT_WRC)
1060 *status |= USB_PORT_STAT_C_BH_RESET << 16;
1061 if (portsc & PORT_CEC)
1062 *status |= USB_PORT_STAT_C_CONFIG_ERROR << 16;
1063
1064 /* USB3 specific wPortStatus bits */
1065 if (portsc & PORT_POWER) {
1066 *status |= USB_SS_PORT_STAT_POWER;
1067 /* link state handling */
1068 if (link_state == XDEV_U0)
1069 bus_state->suspended_ports &= ~(1 << portnum);
1070 }
1071
1072 /* remote wake resume signaling complete */
1073 if (bus_state->port_remote_wakeup & (1 << portnum) &&
1074 link_state != XDEV_RESUME &&
1075 link_state != XDEV_RECOVERY) {
1076 bus_state->port_remote_wakeup &= ~(1 << portnum);
1077 usb_hcd_end_port_resume(&hcd->self, portnum);
1078 }
1079
1080 xhci_hub_report_usb3_link_state(xhci, status, portsc);
1081 xhci_del_comp_mod_timer(xhci, portsc, portnum);
1082}
1083
1084static void xhci_get_usb2_port_status(struct xhci_port *port, u32 *status,
1085 u32 portsc, unsigned long *flags)
1086{
1087 struct xhci_bus_state *bus_state;
1088 u32 link_state;
1089 u32 portnum;
1090 int ret;
1091
1092 bus_state = &port->rhub->bus_state;
1093 link_state = portsc & PORT_PLS_MASK;
1094 portnum = port->hcd_portnum;
1095
1096 /* USB2 wPortStatus bits */
1097 if (portsc & PORT_POWER) {
1098 *status |= USB_PORT_STAT_POWER;
1099
1100 /* link state is only valid if port is powered */
1101 if (link_state == XDEV_U3)
1102 *status |= USB_PORT_STAT_SUSPEND;
1103 if (link_state == XDEV_U2)
1104 *status |= USB_PORT_STAT_L1;
1105 if (link_state == XDEV_U0) {
1106 if (bus_state->resume_done[portnum])
1107 usb_hcd_end_port_resume(&port->rhub->hcd->self,
1108 portnum);
1109 bus_state->resume_done[portnum] = 0;
1110 clear_bit(portnum, &bus_state->resuming_ports);
1111 if (bus_state->suspended_ports & (1 << portnum)) {
1112 bus_state->suspended_ports &= ~(1 << portnum);
1113 bus_state->port_c_suspend |= 1 << portnum;
1114 }
1115 }
1116 if (link_state == XDEV_RESUME) {
1117 ret = xhci_handle_usb2_port_link_resume(port, status,
1118 portsc, flags);
1119 if (ret)
1120 return;
1121 }
1122 }
1123}
1124
1125/*
1126 * Converts a raw xHCI port status into the format that external USB 2.0 or USB
1127 * 3.0 hubs use.
1128 *
1129 * Possible side effects:
1130 * - Mark a port as being done with device resume,
1131 * and ring the endpoint doorbells.
1132 * - Stop the Synopsys redriver Compliance Mode polling.
1133 * - Drop and reacquire the xHCI lock, in order to wait for port resume.
1134 */
1135static u32 xhci_get_port_status(struct usb_hcd *hcd,
1136 struct xhci_bus_state *bus_state,
1137 u16 wIndex, u32 raw_port_status,
1138 unsigned long *flags)
1139 __releases(&xhci->lock)
1140 __acquires(&xhci->lock)
1141{
1142 u32 status = 0;
1143 struct xhci_hub *rhub;
1144 struct xhci_port *port;
1145
1146 rhub = xhci_get_rhub(hcd);
1147 port = rhub->ports[wIndex];
1148
1149 /* common wPortChange bits */
1150 if (raw_port_status & PORT_CSC)
1151 status |= USB_PORT_STAT_C_CONNECTION << 16;
1152 if (raw_port_status & PORT_PEC)
1153 status |= USB_PORT_STAT_C_ENABLE << 16;
1154 if ((raw_port_status & PORT_OCC))
1155 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1156 if ((raw_port_status & PORT_RC))
1157 status |= USB_PORT_STAT_C_RESET << 16;
1158
1159 /* common wPortStatus bits */
1160 if (raw_port_status & PORT_CONNECT) {
1161 status |= USB_PORT_STAT_CONNECTION;
1162 status |= xhci_port_speed(raw_port_status);
1163 }
1164 if (raw_port_status & PORT_PE)
1165 status |= USB_PORT_STAT_ENABLE;
1166 if (raw_port_status & PORT_OC)
1167 status |= USB_PORT_STAT_OVERCURRENT;
1168 if (raw_port_status & PORT_RESET)
1169 status |= USB_PORT_STAT_RESET;
1170
1171 /* USB2 and USB3 specific bits, including Port Link State */
1172 if (hcd->speed >= HCD_USB3)
1173 xhci_get_usb3_port_status(port, &status, raw_port_status);
1174 else
1175 xhci_get_usb2_port_status(port, &status, raw_port_status,
1176 flags);
1177 /*
1178 * Clear stale usb2 resume signalling variables in case port changed
1179 * state during resume signalling. For example on error
1180 */
1181 if ((bus_state->resume_done[wIndex] ||
1182 test_bit(wIndex, &bus_state->resuming_ports)) &&
1183 (raw_port_status & PORT_PLS_MASK) != XDEV_U3 &&
1184 (raw_port_status & PORT_PLS_MASK) != XDEV_RESUME) {
1185 bus_state->resume_done[wIndex] = 0;
1186 clear_bit(wIndex, &bus_state->resuming_ports);
1187 usb_hcd_end_port_resume(&hcd->self, wIndex);
1188 }
1189
1190 if (bus_state->port_c_suspend & (1 << wIndex))
1191 status |= USB_PORT_STAT_C_SUSPEND << 16;
1192
1193 return status;
1194}
1195
1196int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1197 u16 wIndex, char *buf, u16 wLength)
1198{
1199 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1200 int max_ports;
1201 unsigned long flags;
1202 u32 temp, status;
1203 int retval = 0;
1204 int slot_id;
1205 struct xhci_bus_state *bus_state;
1206 u16 link_state = 0;
1207 u16 wake_mask = 0;
1208 u16 timeout = 0;
1209 u16 test_mode = 0;
1210 struct xhci_hub *rhub;
1211 struct xhci_port **ports;
1212
1213 rhub = xhci_get_rhub(hcd);
1214 ports = rhub->ports;
1215 max_ports = rhub->num_ports;
1216 bus_state = &rhub->bus_state;
1217
1218 spin_lock_irqsave(&xhci->lock, flags);
1219 switch (typeReq) {
1220 case GetHubStatus:
1221 /* No power source, over-current reported per port */
1222 memset(buf, 0, 4);
1223 break;
1224 case GetHubDescriptor:
1225 /* Check to make sure userspace is asking for the USB 3.0 hub
1226 * descriptor for the USB 3.0 roothub. If not, we stall the
1227 * endpoint, like external hubs do.
1228 */
1229 if (hcd->speed >= HCD_USB3 &&
1230 (wLength < USB_DT_SS_HUB_SIZE ||
1231 wValue != (USB_DT_SS_HUB << 8))) {
1232 xhci_dbg(xhci, "Wrong hub descriptor type for "
1233 "USB 3.0 roothub.\n");
1234 goto error;
1235 }
1236 xhci_hub_descriptor(hcd, xhci,
1237 (struct usb_hub_descriptor *) buf);
1238 break;
1239 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
1240 if ((wValue & 0xff00) != (USB_DT_BOS << 8))
1241 goto error;
1242
1243 if (hcd->speed < HCD_USB3)
1244 goto error;
1245
1246 retval = xhci_create_usb3x_bos_desc(xhci, buf, wLength);
1247 spin_unlock_irqrestore(&xhci->lock, flags);
1248 return retval;
1249 case GetPortStatus:
1250 if (!wIndex || wIndex > max_ports)
1251 goto error;
1252 wIndex--;
1253 temp = readl(ports[wIndex]->addr);
1254 if (temp == ~(u32)0) {
1255 xhci_hc_died(xhci);
1256 retval = -ENODEV;
1257 break;
1258 }
1259 trace_xhci_get_port_status(wIndex, temp);
1260 status = xhci_get_port_status(hcd, bus_state, wIndex, temp,
1261 &flags);
1262 if (status == 0xffffffff)
1263 goto error;
1264
1265 xhci_dbg(xhci, "Get port status %d-%d read: 0x%x, return 0x%x",
1266 hcd->self.busnum, wIndex + 1, temp, status);
1267
1268 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
1269 /* if USB 3.1 extended port status return additional 4 bytes */
1270 if (wValue == 0x02) {
1271 u32 port_li;
1272
1273 if (hcd->speed < HCD_USB31 || wLength != 8) {
1274 xhci_err(xhci, "get ext port status invalid parameter\n");
1275 retval = -EINVAL;
1276 break;
1277 }
1278 port_li = readl(ports[wIndex]->addr + PORTLI);
1279 status = xhci_get_ext_port_status(temp, port_li);
1280 put_unaligned_le32(status, &buf[4]);
1281 }
1282 break;
1283 case SetPortFeature:
1284 if (wValue == USB_PORT_FEAT_LINK_STATE)
1285 link_state = (wIndex & 0xff00) >> 3;
1286 if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
1287 wake_mask = wIndex & 0xff00;
1288 if (wValue == USB_PORT_FEAT_TEST)
1289 test_mode = (wIndex & 0xff00) >> 8;
1290 /* The MSB of wIndex is the U1/U2 timeout */
1291 timeout = (wIndex & 0xff00) >> 8;
1292 wIndex &= 0xff;
1293 if (!wIndex || wIndex > max_ports)
1294 goto error;
1295 wIndex--;
1296 temp = readl(ports[wIndex]->addr);
1297 if (temp == ~(u32)0) {
1298 xhci_hc_died(xhci);
1299 retval = -ENODEV;
1300 break;
1301 }
1302 temp = xhci_port_state_to_neutral(temp);
1303 /* FIXME: What new port features do we need to support? */
1304 switch (wValue) {
1305 case USB_PORT_FEAT_SUSPEND:
1306 temp = readl(ports[wIndex]->addr);
1307 if ((temp & PORT_PLS_MASK) != XDEV_U0) {
1308 /* Resume the port to U0 first */
1309 xhci_set_link_state(xhci, ports[wIndex],
1310 XDEV_U0);
1311 spin_unlock_irqrestore(&xhci->lock, flags);
1312 msleep(10);
1313 spin_lock_irqsave(&xhci->lock, flags);
1314 }
1315 /* In spec software should not attempt to suspend
1316 * a port unless the port reports that it is in the
1317 * enabled (PED = ‘1’,PLS < ‘3’) state.
1318 */
1319 temp = readl(ports[wIndex]->addr);
1320 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
1321 || (temp & PORT_PLS_MASK) >= XDEV_U3) {
1322 xhci_warn(xhci, "USB core suspending port %d-%d not in U0/U1/U2\n",
1323 hcd->self.busnum, wIndex + 1);
1324 goto error;
1325 }
1326
1327 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1328 wIndex + 1);
1329 if (!slot_id) {
1330 xhci_warn(xhci, "slot_id is zero\n");
1331 goto error;
1332 }
1333 /* unlock to execute stop endpoint commands */
1334 spin_unlock_irqrestore(&xhci->lock, flags);
1335 xhci_stop_device(xhci, slot_id, 1);
1336 spin_lock_irqsave(&xhci->lock, flags);
1337
1338 xhci_set_link_state(xhci, ports[wIndex], XDEV_U3);
1339
1340 spin_unlock_irqrestore(&xhci->lock, flags);
1341 msleep(10); /* wait device to enter */
1342 spin_lock_irqsave(&xhci->lock, flags);
1343
1344 temp = readl(ports[wIndex]->addr);
1345 bus_state->suspended_ports |= 1 << wIndex;
1346 break;
1347 case USB_PORT_FEAT_LINK_STATE:
1348 temp = readl(ports[wIndex]->addr);
1349 /* Disable port */
1350 if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
1351 xhci_dbg(xhci, "Disable port %d-%d\n",
1352 hcd->self.busnum, wIndex + 1);
1353 temp = xhci_port_state_to_neutral(temp);
1354 /*
1355 * Clear all change bits, so that we get a new
1356 * connection event.
1357 */
1358 temp |= PORT_CSC | PORT_PEC | PORT_WRC |
1359 PORT_OCC | PORT_RC | PORT_PLC |
1360 PORT_CEC;
1361 writel(temp | PORT_PE, ports[wIndex]->addr);
1362 temp = readl(ports[wIndex]->addr);
1363 break;
1364 }
1365
1366 /* Put link in RxDetect (enable port) */
1367 if (link_state == USB_SS_PORT_LS_RX_DETECT) {
1368 xhci_dbg(xhci, "Enable port %d-%d\n",
1369 hcd->self.busnum, wIndex + 1);
1370 xhci_set_link_state(xhci, ports[wIndex],
1371 link_state);
1372 temp = readl(ports[wIndex]->addr);
1373 break;
1374 }
1375
1376 /*
1377 * For xHCI 1.1 according to section 4.19.1.2.4.1 a
1378 * root hub port's transition to compliance mode upon
1379 * detecting LFPS timeout may be controlled by an
1380 * Compliance Transition Enabled (CTE) flag (not
1381 * software visible). This flag is set by writing 0xA
1382 * to PORTSC PLS field which will allow transition to
1383 * compliance mode the next time LFPS timeout is
1384 * encountered. A warm reset will clear it.
1385 *
1386 * The CTE flag is only supported if the HCCPARAMS2 CTC
1387 * flag is set, otherwise, the compliance substate is
1388 * automatically entered as on 1.0 and prior.
1389 */
1390 if (link_state == USB_SS_PORT_LS_COMP_MOD) {
1391 if (!HCC2_CTC(xhci->hcc_params2)) {
1392 xhci_dbg(xhci, "CTC flag is 0, port already supports entering compliance mode\n");
1393 break;
1394 }
1395
1396 if ((temp & PORT_CONNECT)) {
1397 xhci_warn(xhci, "Can't set compliance mode when port is connected\n");
1398 goto error;
1399 }
1400
1401 xhci_dbg(xhci, "Enable compliance mode transition for port %d-%d\n",
1402 hcd->self.busnum, wIndex + 1);
1403 xhci_set_link_state(xhci, ports[wIndex],
1404 link_state);
1405
1406 temp = readl(ports[wIndex]->addr);
1407 break;
1408 }
1409 /* Port must be enabled */
1410 if (!(temp & PORT_PE)) {
1411 retval = -ENODEV;
1412 break;
1413 }
1414 /* Can't set port link state above '3' (U3) */
1415 if (link_state > USB_SS_PORT_LS_U3) {
1416 xhci_warn(xhci, "Cannot set port %d-%d link state %d\n",
1417 hcd->self.busnum, wIndex + 1,
1418 link_state);
1419 goto error;
1420 }
1421
1422 /*
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
1427 * completion
1428 */
1429 if (link_state == USB_SS_PORT_LS_U0) {
1430 u32 pls = temp & PORT_PLS_MASK;
1431 bool wait_u0 = false;
1432
1433 /* already in U0 */
1434 if (pls == XDEV_U0)
1435 break;
1436 if (pls == XDEV_U3 ||
1437 pls == XDEV_RESUME ||
1438 pls == XDEV_RECOVERY) {
1439 wait_u0 = true;
1440 reinit_completion(&bus_state->u3exit_done[wIndex]);
1441 }
1442 if (pls <= XDEV_U3) /* U1, U2, U3 */
1443 xhci_set_link_state(xhci, ports[wIndex],
1444 USB_SS_PORT_LS_U0);
1445 if (!wait_u0) {
1446 if (pls > XDEV_U3)
1447 goto error;
1448 break;
1449 }
1450 spin_unlock_irqrestore(&xhci->lock, flags);
1451 if (!wait_for_completion_timeout(&bus_state->u3exit_done[wIndex],
1452 msecs_to_jiffies(500)))
1453 xhci_dbg(xhci, "missing U0 port change event for port %d-%d\n",
1454 hcd->self.busnum, wIndex + 1);
1455 spin_lock_irqsave(&xhci->lock, flags);
1456 temp = readl(ports[wIndex]->addr);
1457 break;
1458 }
1459
1460 if (link_state == USB_SS_PORT_LS_U3) {
1461 int retries = 16;
1462 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1463 wIndex + 1);
1464 if (slot_id) {
1465 /* unlock to execute stop endpoint
1466 * commands */
1467 spin_unlock_irqrestore(&xhci->lock,
1468 flags);
1469 xhci_stop_device(xhci, slot_id, 1);
1470 spin_lock_irqsave(&xhci->lock, flags);
1471 }
1472 xhci_set_link_state(xhci, ports[wIndex], USB_SS_PORT_LS_U3);
1473 spin_unlock_irqrestore(&xhci->lock, flags);
1474 while (retries--) {
1475 usleep_range(4000, 8000);
1476 temp = readl(ports[wIndex]->addr);
1477 if ((temp & PORT_PLS_MASK) == XDEV_U3)
1478 break;
1479 }
1480 spin_lock_irqsave(&xhci->lock, flags);
1481 temp = readl(ports[wIndex]->addr);
1482 bus_state->suspended_ports |= 1 << wIndex;
1483 }
1484 break;
1485 case USB_PORT_FEAT_POWER:
1486 /*
1487 * Turn on ports, even if there isn't per-port switching.
1488 * HC will report connect events even before this is set.
1489 * However, hub_wq will ignore the roothub events until
1490 * the roothub is registered.
1491 */
1492 xhci_set_port_power(xhci, hcd, wIndex, true, &flags);
1493 break;
1494 case USB_PORT_FEAT_RESET:
1495 temp = (temp | PORT_RESET);
1496 writel(temp, ports[wIndex]->addr);
1497
1498 temp = readl(ports[wIndex]->addr);
1499 xhci_dbg(xhci, "set port reset, actual port %d-%d status = 0x%x\n",
1500 hcd->self.busnum, wIndex + 1, temp);
1501 break;
1502 case USB_PORT_FEAT_REMOTE_WAKE_MASK:
1503 xhci_set_remote_wake_mask(xhci, ports[wIndex],
1504 wake_mask);
1505 temp = readl(ports[wIndex]->addr);
1506 xhci_dbg(xhci, "set port remote wake mask, actual port %d-%d status = 0x%x\n",
1507 hcd->self.busnum, wIndex + 1, temp);
1508 break;
1509 case USB_PORT_FEAT_BH_PORT_RESET:
1510 temp |= PORT_WR;
1511 writel(temp, ports[wIndex]->addr);
1512 temp = readl(ports[wIndex]->addr);
1513 break;
1514 case USB_PORT_FEAT_U1_TIMEOUT:
1515 if (hcd->speed < HCD_USB3)
1516 goto error;
1517 temp = readl(ports[wIndex]->addr + PORTPMSC);
1518 temp &= ~PORT_U1_TIMEOUT_MASK;
1519 temp |= PORT_U1_TIMEOUT(timeout);
1520 writel(temp, ports[wIndex]->addr + PORTPMSC);
1521 break;
1522 case USB_PORT_FEAT_U2_TIMEOUT:
1523 if (hcd->speed < HCD_USB3)
1524 goto error;
1525 temp = readl(ports[wIndex]->addr + PORTPMSC);
1526 temp &= ~PORT_U2_TIMEOUT_MASK;
1527 temp |= PORT_U2_TIMEOUT(timeout);
1528 writel(temp, ports[wIndex]->addr + PORTPMSC);
1529 break;
1530 case USB_PORT_FEAT_TEST:
1531 /* 4.19.6 Port Test Modes (USB2 Test Mode) */
1532 if (hcd->speed != HCD_USB2)
1533 goto error;
1534 if (test_mode > USB_TEST_FORCE_ENABLE ||
1535 test_mode < USB_TEST_J)
1536 goto error;
1537 retval = xhci_enter_test_mode(xhci, test_mode, wIndex,
1538 &flags);
1539 break;
1540 default:
1541 goto error;
1542 }
1543 /* unblock any posted writes */
1544 temp = readl(ports[wIndex]->addr);
1545 break;
1546 case ClearPortFeature:
1547 if (!wIndex || wIndex > max_ports)
1548 goto error;
1549 wIndex--;
1550 temp = readl(ports[wIndex]->addr);
1551 if (temp == ~(u32)0) {
1552 xhci_hc_died(xhci);
1553 retval = -ENODEV;
1554 break;
1555 }
1556 /* FIXME: What new port features do we need to support? */
1557 temp = xhci_port_state_to_neutral(temp);
1558 switch (wValue) {
1559 case USB_PORT_FEAT_SUSPEND:
1560 temp = readl(ports[wIndex]->addr);
1561 xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
1562 xhci_dbg(xhci, "PORTSC %04x\n", temp);
1563 if (temp & PORT_RESET)
1564 goto error;
1565 if ((temp & PORT_PLS_MASK) == XDEV_U3) {
1566 if ((temp & PORT_PE) == 0)
1567 goto error;
1568
1569 set_bit(wIndex, &bus_state->resuming_ports);
1570 usb_hcd_start_port_resume(&hcd->self, wIndex);
1571 xhci_set_link_state(xhci, ports[wIndex],
1572 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, ports[wIndex],
1577 XDEV_U0);
1578 clear_bit(wIndex, &bus_state->resuming_ports);
1579 usb_hcd_end_port_resume(&hcd->self, wIndex);
1580 }
1581 bus_state->port_c_suspend |= 1 << wIndex;
1582
1583 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1584 wIndex + 1);
1585 if (!slot_id) {
1586 xhci_dbg(xhci, "slot_id is zero\n");
1587 goto error;
1588 }
1589 xhci_ring_device(xhci, slot_id);
1590 break;
1591 case USB_PORT_FEAT_C_SUSPEND:
1592 bus_state->port_c_suspend &= ~(1 << wIndex);
1593 fallthrough;
1594 case USB_PORT_FEAT_C_RESET:
1595 case USB_PORT_FEAT_C_BH_PORT_RESET:
1596 case USB_PORT_FEAT_C_CONNECTION:
1597 case USB_PORT_FEAT_C_OVER_CURRENT:
1598 case USB_PORT_FEAT_C_ENABLE:
1599 case USB_PORT_FEAT_C_PORT_LINK_STATE:
1600 case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
1601 xhci_clear_port_change_bit(xhci, wValue, wIndex,
1602 ports[wIndex]->addr, temp);
1603 break;
1604 case USB_PORT_FEAT_ENABLE:
1605 xhci_disable_port(hcd, xhci, wIndex,
1606 ports[wIndex]->addr, temp);
1607 break;
1608 case USB_PORT_FEAT_POWER:
1609 xhci_set_port_power(xhci, hcd, wIndex, false, &flags);
1610 break;
1611 case USB_PORT_FEAT_TEST:
1612 retval = xhci_exit_test_mode(xhci);
1613 break;
1614 default:
1615 goto error;
1616 }
1617 break;
1618 default:
1619error:
1620 /* "stall" on error */
1621 retval = -EPIPE;
1622 }
1623 spin_unlock_irqrestore(&xhci->lock, flags);
1624 return retval;
1625}
1626
1627/*
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.
1631 *
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.
1634 */
1635int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
1636{
1637 unsigned long flags;
1638 u32 temp, status;
1639 u32 mask;
1640 int i, retval;
1641 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
1642 int max_ports;
1643 struct xhci_bus_state *bus_state;
1644 bool reset_change = false;
1645 struct xhci_hub *rhub;
1646 struct xhci_port **ports;
1647
1648 rhub = xhci_get_rhub(hcd);
1649 ports = rhub->ports;
1650 max_ports = rhub->num_ports;
1651 bus_state = &rhub->bus_state;
1652
1653 /* Initial status is no changes */
1654 retval = (max_ports + 8) / 8;
1655 memset(buf, 0, retval);
1656
1657 /*
1658 * Inform the usbcore about resume-in-progress by returning
1659 * a non-zero value even if there are no status changes.
1660 */
1661 spin_lock_irqsave(&xhci->lock, flags);
1662
1663 status = bus_state->resuming_ports;
1664
1665 /*
1666 * SS devices are only visible to roothub after link training completes.
1667 * Keep polling roothubs for a grace period after xHC start
1668 */
1669 if (xhci->run_graceperiod) {
1670 if (time_before(jiffies, xhci->run_graceperiod))
1671 status = 1;
1672 else
1673 xhci->run_graceperiod = 0;
1674 }
1675
1676 mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC | PORT_CEC;
1677
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) {
1682 xhci_hc_died(xhci);
1683 retval = -ENODEV;
1684 break;
1685 }
1686 trace_xhci_hub_status_data(i, temp);
1687
1688 if ((temp & mask) != 0 ||
1689 (bus_state->port_c_suspend & 1 << i) ||
1690 (bus_state->resume_done[i] && time_after_eq(
1691 jiffies, bus_state->resume_done[i]))) {
1692 buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
1693 status = 1;
1694 }
1695 if ((temp & PORT_RC))
1696 reset_change = true;
1697 if (temp & PORT_OC)
1698 status = 1;
1699 }
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);
1704 }
1705 spin_unlock_irqrestore(&xhci->lock, flags);
1706 return status ? retval : 0;
1707}
1708
1709#ifdef CONFIG_PM
1710
1711int xhci_bus_suspend(struct usb_hcd *hcd)
1712{
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];
1720 bool wake_enabled;
1721
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;
1727
1728 spin_lock_irqsave(&xhci->lock, flags);
1729
1730 if (wake_enabled) {
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",
1735 hcd->self.busnum);
1736 return -EBUSY;
1737 }
1738 }
1739 /*
1740 * Prepare ports for suspend, but don't write anything before all ports
1741 * are checked and we know bus suspend can proceed
1742 */
1743 bus_state->bus_suspended = 0;
1744 port_index = max_ports;
1745 while (port_index--) {
1746 u32 t1, t2;
1747 int retries = 10;
1748retry:
1749 t1 = readl(ports[port_index]->addr);
1750 t2 = xhci_port_state_to_neutral(t1);
1751 portsc_buf[port_index] = 0;
1752
1753 /*
1754 * Give a USB3 port in link training time to finish, but don't
1755 * prevent suspend as port might be stuck
1756 */
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);
1764 goto retry;
1765 }
1766 /* bail out if port detected a over-current condition */
1767 if (t1 & PORT_OC) {
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");
1771 return -EBUSY;
1772 }
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");
1779 return -EBUSY;
1780 }
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);
1786 }
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.
1790 */
1791 if (wake_enabled) {
1792 if (t1 & PORT_CONNECT) {
1793 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
1794 t2 &= ~PORT_WKCONN_E;
1795 } else {
1796 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
1797 t2 &= ~PORT_WKDISC_E;
1798 }
1799
1800 if ((xhci->quirks & XHCI_U2_DISABLE_WAKE) &&
1801 (hcd->speed < HCD_USB3)) {
1802 if (usb_amd_pt_check_port(hcd->self.controller,
1803 port_index))
1804 t2 &= ~PORT_WAKE_BITS;
1805 }
1806 } else
1807 t2 &= ~PORT_WAKE_BITS;
1808
1809 t1 = xhci_port_state_to_neutral(t1);
1810 if (t1 != t2)
1811 portsc_buf[port_index] = t2;
1812 }
1813
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])
1818 continue;
1819 if (test_bit(port_index, &bus_state->bus_suspended)) {
1820 int slot_id;
1821
1822 slot_id = xhci_find_slot_id_by_port(hcd, xhci,
1823 port_index + 1);
1824 if (slot_id) {
1825 spin_unlock_irqrestore(&xhci->lock, flags);
1826 xhci_stop_device(xhci, slot_id, 1);
1827 spin_lock_irqsave(&xhci->lock, flags);
1828 }
1829 }
1830 writel(portsc_buf[port_index], ports[port_index]->addr);
1831 }
1832 hcd->state = HC_STATE_SUSPENDED;
1833 bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
1834 spin_unlock_irqrestore(&xhci->lock, flags);
1835
1836 if (bus_state->bus_suspended)
1837 usleep_range(5000, 10000);
1838
1839 return 0;
1840}
1841
1842/*
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
1846 */
1847static bool xhci_port_missing_cas_quirk(struct xhci_port *port)
1848{
1849 u32 portsc;
1850
1851 portsc = readl(port->addr);
1852
1853 /* if any of these are set we are not stuck */
1854 if (portsc & (PORT_CONNECT | PORT_CAS))
1855 return false;
1856
1857 if (((portsc & PORT_PLS_MASK) != XDEV_POLLING) &&
1858 ((portsc & PORT_PLS_MASK) != XDEV_COMP_MODE))
1859 return false;
1860
1861 /* clear wakeup/change bits, and do a warm port reset */
1862 portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
1863 portsc |= PORT_WR;
1864 writel(portsc, port->addr);
1865 /* flush write */
1866 readl(port->addr);
1867 return true;
1868}
1869
1870int xhci_bus_resume(struct usb_hcd *hcd)
1871{
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;
1876 int slot_id;
1877 int sret;
1878 u32 next_state;
1879 u32 temp, portsc;
1880 struct xhci_hub *rhub;
1881 struct xhci_port **ports;
1882
1883 rhub = xhci_get_rhub(hcd);
1884 ports = rhub->ports;
1885 max_ports = rhub->num_ports;
1886 bus_state = &rhub->bus_state;
1887
1888 if (time_before(jiffies, bus_state->next_statechange))
1889 msleep(5);
1890
1891 spin_lock_irqsave(&xhci->lock, flags);
1892 if (!HCD_HW_ACCESSIBLE(hcd)) {
1893 spin_unlock_irqrestore(&xhci->lock, flags);
1894 return -ESHUTDOWN;
1895 }
1896
1897 /* delay the irqs */
1898 temp = readl(&xhci->op_regs->command);
1899 temp &= ~CMD_EIE;
1900 writel(temp, &xhci->op_regs->command);
1901
1902 /* bus specific resume for ports we suspended at bus_suspend */
1903 if (hcd->speed >= HCD_USB3)
1904 next_state = XDEV_U0;
1905 else
1906 next_state = XDEV_RESUME;
1907
1908 port_index = max_ports;
1909 while (port_index--) {
1910 portsc = readl(ports[port_index]->addr);
1911
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);
1919 continue;
1920 }
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) {
1924 case XDEV_U3:
1925 portsc = xhci_port_state_to_neutral(portsc);
1926 portsc &= ~PORT_PLS_MASK;
1927 portsc |= PORT_LINK_STROBE | next_state;
1928 break;
1929 case XDEV_RESUME:
1930 /* resume already initiated */
1931 break;
1932 default:
1933 /* not in a resumeable state, ignore it */
1934 clear_bit(port_index,
1935 &bus_state->bus_suspended);
1936 break;
1937 }
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);
1941 }
1942
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);
1949 }
1950 for_each_set_bit(port_index, &bus_state->bus_suspended,
1951 BITS_PER_LONG) {
1952 /* Clear PLC to poll it later for U0 transition */
1953 xhci_test_and_clear_bit(xhci, ports[port_index],
1954 PORT_PLC);
1955 xhci_set_link_state(xhci, ports[port_index], XDEV_U0);
1956 }
1957 }
1958
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);
1963 if (sret) {
1964 xhci_warn(xhci, "port %d-%d resume PLC timeout\n",
1965 hcd->self.busnum, port_index + 1);
1966 continue;
1967 }
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);
1970 if (slot_id)
1971 xhci_ring_device(xhci, slot_id);
1972 }
1973 (void) readl(&xhci->op_regs->command);
1974
1975 bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
1976 /* re-enable irqs */
1977 temp = readl(&xhci->op_regs->command);
1978 temp |= CMD_EIE;
1979 writel(temp, &xhci->op_regs->command);
1980 temp = readl(&xhci->op_regs->command);
1981
1982 spin_unlock_irqrestore(&xhci->lock, flags);
1983 return 0;
1984}
1985
1986unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd)
1987{
1988 struct xhci_hub *rhub = xhci_get_rhub(hcd);
1989
1990 /* USB3 port wakeups are reported via usb_wakeup_notification() */
1991 return rhub->bus_state.resuming_ports; /* USB2 ports only */
1992}
1993
1994#endif /* CONFIG_PM */