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Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-hirsute-kernel.git] / drivers / usb / host / xhci-pci.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * xHCI host controller driver PCI Bus Glue.
4 *
5 * Copyright (C) 2008 Intel Corp.
6 *
7 * Author: Sarah Sharp
8 * Some code borrowed from the Linux EHCI driver.
9 */
10
11 #include <linux/pci.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/acpi.h>
15
16 #include "xhci.h"
17 #include "xhci-trace.h"
18
19 #define SSIC_PORT_NUM 2
20 #define SSIC_PORT_CFG2 0x880c
21 #define SSIC_PORT_CFG2_OFFSET 0x30
22 #define PROG_DONE (1 << 30)
23 #define SSIC_PORT_UNUSED (1 << 31)
24
25 /* Device for a quirk */
26 #define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73
27 #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000
28 #define PCI_DEVICE_ID_FRESCO_LOGIC_FL1009 0x1009
29 #define PCI_DEVICE_ID_FRESCO_LOGIC_FL1400 0x1400
30
31 #define PCI_VENDOR_ID_ETRON 0x1b6f
32 #define PCI_DEVICE_ID_EJ168 0x7023
33
34 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_XHCI 0x8c31
35 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31
36 #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_XHCI 0x9cb1
37 #define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI 0x22b5
38 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI 0xa12f
39 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI 0x9d2f
40 #define PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI 0x0aa8
41 #define PCI_DEVICE_ID_INTEL_BROXTON_B_XHCI 0x1aa8
42 #define PCI_DEVICE_ID_INTEL_APL_XHCI 0x5aa8
43 #define PCI_DEVICE_ID_INTEL_DNV_XHCI 0x19d0
44 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_XHCI 0x15b5
45 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_XHCI 0x15b6
46 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_XHCI 0x15db
47 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_XHCI 0x15d4
48 #define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_XHCI 0x15e9
49 #define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_XHCI 0x15ec
50 #define PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_XHCI 0x15f0
51
52 #define PCI_DEVICE_ID_AMD_PROMONTORYA_4 0x43b9
53 #define PCI_DEVICE_ID_AMD_PROMONTORYA_3 0x43ba
54 #define PCI_DEVICE_ID_AMD_PROMONTORYA_2 0x43bb
55 #define PCI_DEVICE_ID_AMD_PROMONTORYA_1 0x43bc
56 #define PCI_DEVICE_ID_ASMEDIA_1042A_XHCI 0x1142
57
58 static const char hcd_name[] = "xhci_hcd";
59
60 static struct hc_driver __read_mostly xhci_pci_hc_driver;
61
62 static int xhci_pci_setup(struct usb_hcd *hcd);
63
64 static const struct xhci_driver_overrides xhci_pci_overrides __initconst = {
65 .reset = xhci_pci_setup,
66 };
67
68 /* called after powerup, by probe or system-pm "wakeup" */
69 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
70 {
71 /*
72 * TODO: Implement finding debug ports later.
73 * TODO: see if there are any quirks that need to be added to handle
74 * new extended capabilities.
75 */
76
77 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
78 if (!pci_set_mwi(pdev))
79 xhci_dbg(xhci, "MWI active\n");
80
81 xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
82 return 0;
83 }
84
85 static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
86 {
87 struct pci_dev *pdev = to_pci_dev(dev);
88
89 /* Look for vendor-specific quirks */
90 if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
91 (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK ||
92 pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1400)) {
93 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
94 pdev->revision == 0x0) {
95 xhci->quirks |= XHCI_RESET_EP_QUIRK;
96 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
97 "QUIRK: Fresco Logic xHC needs configure"
98 " endpoint cmd after reset endpoint");
99 }
100 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK &&
101 pdev->revision == 0x4) {
102 xhci->quirks |= XHCI_SLOW_SUSPEND;
103 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
104 "QUIRK: Fresco Logic xHC revision %u"
105 "must be suspended extra slowly",
106 pdev->revision);
107 }
108 if (pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK)
109 xhci->quirks |= XHCI_BROKEN_STREAMS;
110 /* Fresco Logic confirms: all revisions of this chip do not
111 * support MSI, even though some of them claim to in their PCI
112 * capabilities.
113 */
114 xhci->quirks |= XHCI_BROKEN_MSI;
115 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
116 "QUIRK: Fresco Logic revision %u "
117 "has broken MSI implementation",
118 pdev->revision);
119 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
120 }
121
122 if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC &&
123 pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_FL1009)
124 xhci->quirks |= XHCI_BROKEN_STREAMS;
125
126 if (pdev->vendor == PCI_VENDOR_ID_NEC)
127 xhci->quirks |= XHCI_NEC_HOST;
128
129 if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version == 0x96)
130 xhci->quirks |= XHCI_AMD_0x96_HOST;
131
132 /* AMD PLL quirk */
133 if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_quirk_pll_check())
134 xhci->quirks |= XHCI_AMD_PLL_FIX;
135
136 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
137 (pdev->device == 0x15e0 ||
138 pdev->device == 0x15e1 ||
139 pdev->device == 0x43bb))
140 xhci->quirks |= XHCI_SUSPEND_DELAY;
141
142 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
143 (pdev->device == 0x15e0 || pdev->device == 0x15e1))
144 xhci->quirks |= XHCI_SNPS_BROKEN_SUSPEND;
145
146 if (pdev->vendor == PCI_VENDOR_ID_AMD)
147 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
148
149 if ((pdev->vendor == PCI_VENDOR_ID_AMD) &&
150 ((pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_4) ||
151 (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_3) ||
152 (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_2) ||
153 (pdev->device == PCI_DEVICE_ID_AMD_PROMONTORYA_1)))
154 xhci->quirks |= XHCI_U2_DISABLE_WAKE;
155
156 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
157 xhci->quirks |= XHCI_LPM_SUPPORT;
158 xhci->quirks |= XHCI_INTEL_HOST;
159 xhci->quirks |= XHCI_AVOID_BEI;
160 }
161 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
162 pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI) {
163 xhci->quirks |= XHCI_EP_LIMIT_QUIRK;
164 xhci->limit_active_eps = 64;
165 xhci->quirks |= XHCI_SW_BW_CHECKING;
166 /*
167 * PPT desktop boards DH77EB and DH77DF will power back on after
168 * a few seconds of being shutdown. The fix for this is to
169 * switch the ports from xHCI to EHCI on shutdown. We can't use
170 * DMI information to find those particular boards (since each
171 * vendor will change the board name), so we have to key off all
172 * PPT chipsets.
173 */
174 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
175 }
176 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
177 (pdev->device == PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI ||
178 pdev->device == PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_XHCI)) {
179 xhci->quirks |= XHCI_SPURIOUS_REBOOT;
180 xhci->quirks |= XHCI_SPURIOUS_WAKEUP;
181 }
182 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
183 (pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
184 pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
185 pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
186 pdev->device == PCI_DEVICE_ID_INTEL_BROXTON_M_XHCI ||
187 pdev->device == PCI_DEVICE_ID_INTEL_BROXTON_B_XHCI ||
188 pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI ||
189 pdev->device == PCI_DEVICE_ID_INTEL_DNV_XHCI)) {
190 xhci->quirks |= XHCI_PME_STUCK_QUIRK;
191 }
192 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
193 pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI)
194 xhci->quirks |= XHCI_SSIC_PORT_UNUSED;
195 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
196 (pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
197 pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
198 pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI))
199 xhci->quirks |= XHCI_INTEL_USB_ROLE_SW;
200 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
201 (pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
202 pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_XHCI ||
203 pdev->device == PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_XHCI ||
204 pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI ||
205 pdev->device == PCI_DEVICE_ID_INTEL_DNV_XHCI))
206 xhci->quirks |= XHCI_MISSING_CAS;
207
208 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
209 (pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_XHCI ||
210 pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_XHCI ||
211 pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_XHCI ||
212 pdev->device == PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_XHCI ||
213 pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_XHCI ||
214 pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_XHCI ||
215 pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_XHCI))
216 xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
217
218 if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
219 pdev->device == PCI_DEVICE_ID_EJ168) {
220 xhci->quirks |= XHCI_RESET_ON_RESUME;
221 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
222 xhci->quirks |= XHCI_BROKEN_STREAMS;
223 }
224 if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
225 pdev->device == 0x0014) {
226 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
227 xhci->quirks |= XHCI_ZERO_64B_REGS;
228 }
229 if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
230 pdev->device == 0x0015) {
231 xhci->quirks |= XHCI_RESET_ON_RESUME;
232 xhci->quirks |= XHCI_ZERO_64B_REGS;
233 }
234 if (pdev->vendor == PCI_VENDOR_ID_VIA)
235 xhci->quirks |= XHCI_RESET_ON_RESUME;
236
237 /* See https://bugzilla.kernel.org/show_bug.cgi?id=79511 */
238 if (pdev->vendor == PCI_VENDOR_ID_VIA &&
239 pdev->device == 0x3432)
240 xhci->quirks |= XHCI_BROKEN_STREAMS;
241
242 if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
243 pdev->device == 0x1042)
244 xhci->quirks |= XHCI_BROKEN_STREAMS;
245 if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
246 pdev->device == 0x1142)
247 xhci->quirks |= XHCI_TRUST_TX_LENGTH;
248
249 if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
250 pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI)
251 xhci->quirks |= XHCI_ASMEDIA_MODIFY_FLOWCONTROL;
252
253 if (pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241)
254 xhci->quirks |= XHCI_LIMIT_ENDPOINT_INTERVAL_7;
255
256 if ((pdev->vendor == PCI_VENDOR_ID_BROADCOM ||
257 pdev->vendor == PCI_VENDOR_ID_CAVIUM) &&
258 pdev->device == 0x9026)
259 xhci->quirks |= XHCI_RESET_PLL_ON_DISCONNECT;
260
261 if (xhci->quirks & XHCI_RESET_ON_RESUME)
262 xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
263 "QUIRK: Resetting on resume");
264 }
265
266 #ifdef CONFIG_ACPI
267 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
268 {
269 static const guid_t intel_dsm_guid =
270 GUID_INIT(0xac340cb7, 0xe901, 0x45bf,
271 0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23);
272 union acpi_object *obj;
273
274 obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), &intel_dsm_guid, 3, 1,
275 NULL);
276 ACPI_FREE(obj);
277 }
278 #else
279 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev) { }
280 #endif /* CONFIG_ACPI */
281
282 /* called during probe() after chip reset completes */
283 static int xhci_pci_setup(struct usb_hcd *hcd)
284 {
285 struct xhci_hcd *xhci;
286 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
287 int retval;
288
289 xhci = hcd_to_xhci(hcd);
290 if (!xhci->sbrn)
291 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
292
293 /* imod_interval is the interrupt moderation value in nanoseconds. */
294 xhci->imod_interval = 40000;
295
296 retval = xhci_gen_setup(hcd, xhci_pci_quirks);
297 if (retval)
298 return retval;
299
300 if (!usb_hcd_is_primary_hcd(hcd))
301 return 0;
302
303 xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
304
305 /* Find any debug ports */
306 return xhci_pci_reinit(xhci, pdev);
307 }
308
309 /*
310 * We need to register our own PCI probe function (instead of the USB core's
311 * function) in order to create a second roothub under xHCI.
312 */
313 static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
314 {
315 int retval;
316 struct xhci_hcd *xhci;
317 struct hc_driver *driver;
318 struct usb_hcd *hcd;
319
320 driver = (struct hc_driver *)id->driver_data;
321
322 /* Prevent runtime suspending between USB-2 and USB-3 initialization */
323 pm_runtime_get_noresume(&dev->dev);
324
325 /* Register the USB 2.0 roothub.
326 * FIXME: USB core must know to register the USB 2.0 roothub first.
327 * This is sort of silly, because we could just set the HCD driver flags
328 * to say USB 2.0, but I'm not sure what the implications would be in
329 * the other parts of the HCD code.
330 */
331 retval = usb_hcd_pci_probe(dev, id);
332
333 if (retval)
334 goto put_runtime_pm;
335
336 /* USB 2.0 roothub is stored in the PCI device now. */
337 hcd = dev_get_drvdata(&dev->dev);
338 xhci = hcd_to_xhci(hcd);
339 xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev,
340 pci_name(dev), hcd);
341 if (!xhci->shared_hcd) {
342 retval = -ENOMEM;
343 goto dealloc_usb2_hcd;
344 }
345
346 retval = xhci_ext_cap_init(xhci);
347 if (retval)
348 goto put_usb3_hcd;
349
350 retval = usb_add_hcd(xhci->shared_hcd, dev->irq,
351 IRQF_SHARED);
352 if (retval)
353 goto put_usb3_hcd;
354 /* Roothub already marked as USB 3.0 speed */
355
356 if (!(xhci->quirks & XHCI_BROKEN_STREAMS) &&
357 HCC_MAX_PSA(xhci->hcc_params) >= 4)
358 xhci->shared_hcd->can_do_streams = 1;
359
360 if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
361 xhci_pme_acpi_rtd3_enable(dev);
362
363 /* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */
364 pm_runtime_put_noidle(&dev->dev);
365
366 if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
367 pm_runtime_allow(&dev->dev);
368
369 return 0;
370
371 put_usb3_hcd:
372 usb_put_hcd(xhci->shared_hcd);
373 dealloc_usb2_hcd:
374 usb_hcd_pci_remove(dev);
375 put_runtime_pm:
376 pm_runtime_put_noidle(&dev->dev);
377 return retval;
378 }
379
380 static void xhci_pci_remove(struct pci_dev *dev)
381 {
382 struct xhci_hcd *xhci;
383
384 xhci = hcd_to_xhci(pci_get_drvdata(dev));
385 xhci->xhc_state |= XHCI_STATE_REMOVING;
386
387 if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
388 pm_runtime_forbid(&dev->dev);
389
390 if (xhci->shared_hcd) {
391 usb_remove_hcd(xhci->shared_hcd);
392 usb_put_hcd(xhci->shared_hcd);
393 xhci->shared_hcd = NULL;
394 }
395
396 /* Workaround for spurious wakeups at shutdown with HSW */
397 if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
398 pci_set_power_state(dev, PCI_D3hot);
399
400 usb_hcd_pci_remove(dev);
401 }
402
403 #ifdef CONFIG_PM
404 /*
405 * In some Intel xHCI controllers, in order to get D3 working,
406 * through a vendor specific SSIC CONFIG register at offset 0x883c,
407 * SSIC PORT need to be marked as "unused" before putting xHCI
408 * into D3. After D3 exit, the SSIC port need to be marked as "used".
409 * Without this change, xHCI might not enter D3 state.
410 */
411 static void xhci_ssic_port_unused_quirk(struct usb_hcd *hcd, bool suspend)
412 {
413 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
414 u32 val;
415 void __iomem *reg;
416 int i;
417
418 for (i = 0; i < SSIC_PORT_NUM; i++) {
419 reg = (void __iomem *) xhci->cap_regs +
420 SSIC_PORT_CFG2 +
421 i * SSIC_PORT_CFG2_OFFSET;
422
423 /* Notify SSIC that SSIC profile programming is not done. */
424 val = readl(reg) & ~PROG_DONE;
425 writel(val, reg);
426
427 /* Mark SSIC port as unused(suspend) or used(resume) */
428 val = readl(reg);
429 if (suspend)
430 val |= SSIC_PORT_UNUSED;
431 else
432 val &= ~SSIC_PORT_UNUSED;
433 writel(val, reg);
434
435 /* Notify SSIC that SSIC profile programming is done */
436 val = readl(reg) | PROG_DONE;
437 writel(val, reg);
438 readl(reg);
439 }
440 }
441
442 /*
443 * Make sure PME works on some Intel xHCI controllers by writing 1 to clear
444 * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4
445 */
446 static void xhci_pme_quirk(struct usb_hcd *hcd)
447 {
448 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
449 void __iomem *reg;
450 u32 val;
451
452 reg = (void __iomem *) xhci->cap_regs + 0x80a4;
453 val = readl(reg);
454 writel(val | BIT(28), reg);
455 readl(reg);
456 }
457
458 static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
459 {
460 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
461 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
462 int ret;
463
464 /*
465 * Systems with the TI redriver that loses port status change events
466 * need to have the registers polled during D3, so avoid D3cold.
467 */
468 if (xhci->quirks & XHCI_COMP_MODE_QUIRK)
469 pci_d3cold_disable(pdev);
470
471 if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
472 xhci_pme_quirk(hcd);
473
474 if (xhci->quirks & XHCI_SSIC_PORT_UNUSED)
475 xhci_ssic_port_unused_quirk(hcd, true);
476
477 ret = xhci_suspend(xhci, do_wakeup);
478 if (ret && (xhci->quirks & XHCI_SSIC_PORT_UNUSED))
479 xhci_ssic_port_unused_quirk(hcd, false);
480
481 return ret;
482 }
483
484 static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
485 {
486 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
487 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
488 int retval = 0;
489
490 /* The BIOS on systems with the Intel Panther Point chipset may or may
491 * not support xHCI natively. That means that during system resume, it
492 * may switch the ports back to EHCI so that users can use their
493 * keyboard to select a kernel from GRUB after resume from hibernate.
494 *
495 * The BIOS is supposed to remember whether the OS had xHCI ports
496 * enabled before resume, and switch the ports back to xHCI when the
497 * BIOS/OS semaphore is written, but we all know we can't trust BIOS
498 * writers.
499 *
500 * Unconditionally switch the ports back to xHCI after a system resume.
501 * It should not matter whether the EHCI or xHCI controller is
502 * resumed first. It's enough to do the switchover in xHCI because
503 * USB core won't notice anything as the hub driver doesn't start
504 * running again until after all the devices (including both EHCI and
505 * xHCI host controllers) have been resumed.
506 */
507
508 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
509 usb_enable_intel_xhci_ports(pdev);
510
511 if (xhci->quirks & XHCI_SSIC_PORT_UNUSED)
512 xhci_ssic_port_unused_quirk(hcd, false);
513
514 if (xhci->quirks & XHCI_PME_STUCK_QUIRK)
515 xhci_pme_quirk(hcd);
516
517 retval = xhci_resume(xhci, hibernated);
518 return retval;
519 }
520 #endif /* CONFIG_PM */
521
522 /*-------------------------------------------------------------------------*/
523
524 /* PCI driver selection metadata; PCI hotplugging uses this */
525 static const struct pci_device_id pci_ids[] = { {
526 /* handle any USB 3.0 xHCI controller */
527 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
528 .driver_data = (unsigned long) &xhci_pci_hc_driver,
529 },
530 { /* end: all zeroes */ }
531 };
532 MODULE_DEVICE_TABLE(pci, pci_ids);
533
534 /* pci driver glue; this is a "new style" PCI driver module */
535 static struct pci_driver xhci_pci_driver = {
536 .name = (char *) hcd_name,
537 .id_table = pci_ids,
538
539 .probe = xhci_pci_probe,
540 .remove = xhci_pci_remove,
541 /* suspend and resume implemented later */
542
543 .shutdown = usb_hcd_pci_shutdown,
544 #ifdef CONFIG_PM
545 .driver = {
546 .pm = &usb_hcd_pci_pm_ops
547 },
548 #endif
549 };
550
551 static int __init xhci_pci_init(void)
552 {
553 xhci_init_driver(&xhci_pci_hc_driver, &xhci_pci_overrides);
554 #ifdef CONFIG_PM
555 xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend;
556 xhci_pci_hc_driver.pci_resume = xhci_pci_resume;
557 #endif
558 return pci_register_driver(&xhci_pci_driver);
559 }
560 module_init(xhci_pci_init);
561
562 static void __exit xhci_pci_exit(void)
563 {
564 pci_unregister_driver(&xhci_pci_driver);
565 }
566 module_exit(xhci_pci_exit);
567
568 MODULE_DESCRIPTION("xHCI PCI Host Controller Driver");
569 MODULE_LICENSE("GPL");
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