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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This file contains code to reset and initialize USB host controllers.
4 * Some of it includes work-arounds for PCI hardware and BIOS quirks.
5 * It may need to run early during booting -- before USB would normally
6 * initialize -- to ensure that Linux doesn't use any legacy modes.
7 *
8 * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
9 * (and others)
10 */
11
12#include <linux/types.h>
13#include <linux/kernel.h>
14#include <linux/pci.h>
15#include <linux/delay.h>
16#include <linux/export.h>
17#include <linux/acpi.h>
18#include <linux/dmi.h>
19#include <linux/of.h>
20#include <linux/iopoll.h>
21
22#include "pci-quirks.h"
23#include "xhci-ext-caps.h"
24
25
26#define UHCI_USBLEGSUP 0xc0 /* legacy support */
27#define UHCI_USBCMD 0 /* command register */
28#define UHCI_USBINTR 4 /* interrupt register */
29#define UHCI_USBLEGSUP_RWC 0x8f00 /* the R/WC bits */
30#define UHCI_USBLEGSUP_RO 0x5040 /* R/O and reserved bits */
31#define UHCI_USBCMD_RUN 0x0001 /* RUN/STOP bit */
32#define UHCI_USBCMD_HCRESET 0x0002 /* Host Controller reset */
33#define UHCI_USBCMD_EGSM 0x0008 /* Global Suspend Mode */
34#define UHCI_USBCMD_CONFIGURE 0x0040 /* Config Flag */
35#define UHCI_USBINTR_RESUME 0x0002 /* Resume interrupt enable */
36
37#define OHCI_CONTROL 0x04
38#define OHCI_CMDSTATUS 0x08
39#define OHCI_INTRSTATUS 0x0c
40#define OHCI_INTRENABLE 0x10
41#define OHCI_INTRDISABLE 0x14
42#define OHCI_FMINTERVAL 0x34
43#define OHCI_HCFS (3 << 6) /* hc functional state */
44#define OHCI_HCR (1 << 0) /* host controller reset */
45#define OHCI_OCR (1 << 3) /* ownership change request */
46#define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
47#define OHCI_CTRL_IR (1 << 8) /* interrupt routing */
48#define OHCI_INTR_OC (1 << 30) /* ownership change */
49
50#define EHCI_HCC_PARAMS 0x08 /* extended capabilities */
51#define EHCI_USBCMD 0 /* command register */
52#define EHCI_USBCMD_RUN (1 << 0) /* RUN/STOP bit */
53#define EHCI_USBSTS 4 /* status register */
54#define EHCI_USBSTS_HALTED (1 << 12) /* HCHalted bit */
55#define EHCI_USBINTR 8 /* interrupt register */
56#define EHCI_CONFIGFLAG 0x40 /* configured flag register */
57#define EHCI_USBLEGSUP 0 /* legacy support register */
58#define EHCI_USBLEGSUP_BIOS (1 << 16) /* BIOS semaphore */
59#define EHCI_USBLEGSUP_OS (1 << 24) /* OS semaphore */
60#define EHCI_USBLEGCTLSTS 4 /* legacy control/status */
61#define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */
62
63/* ASMEDIA quirk use */
64#define ASMT_DATA_WRITE0_REG 0xF8
65#define ASMT_DATA_WRITE1_REG 0xFC
66#define ASMT_CONTROL_REG 0xE0
67#define ASMT_CONTROL_WRITE_BIT 0x02
68#define ASMT_WRITEREG_CMD 0x10423
69#define ASMT_FLOWCTL_ADDR 0xFA30
70#define ASMT_FLOWCTL_DATA 0xBA
71#define ASMT_PSEUDO_DATA 0
72
73/* Intel quirk use */
74#define USB_INTEL_XUSB2PR 0xD0
75#define USB_INTEL_USB2PRM 0xD4
76#define USB_INTEL_USB3_PSSEN 0xD8
77#define USB_INTEL_USB3PRM 0xDC
78
79#ifdef CONFIG_USB_PCI_AMD
80/* AMD quirk use */
81#define AB_REG_BAR_LOW 0xe0
82#define AB_REG_BAR_HIGH 0xe1
83#define AB_REG_BAR_SB700 0xf0
84#define AB_INDX(addr) ((addr) + 0x00)
85#define AB_DATA(addr) ((addr) + 0x04)
86#define AX_INDXC 0x30
87#define AX_DATAC 0x34
88
89#define PT_ADDR_INDX 0xE8
90#define PT_READ_INDX 0xE4
91#define PT_SIG_1_ADDR 0xA520
92#define PT_SIG_2_ADDR 0xA521
93#define PT_SIG_3_ADDR 0xA522
94#define PT_SIG_4_ADDR 0xA523
95#define PT_SIG_1_DATA 0x78
96#define PT_SIG_2_DATA 0x56
97#define PT_SIG_3_DATA 0x34
98#define PT_SIG_4_DATA 0x12
99#define PT4_P1_REG 0xB521
100#define PT4_P2_REG 0xB522
101#define PT2_P1_REG 0xD520
102#define PT2_P2_REG 0xD521
103#define PT1_P1_REG 0xD522
104#define PT1_P2_REG 0xD523
105
106#define NB_PCIE_INDX_ADDR 0xe0
107#define NB_PCIE_INDX_DATA 0xe4
108#define PCIE_P_CNTL 0x10040
109#define BIF_NB 0x10002
110#define NB_PIF0_PWRDOWN_0 0x01100012
111#define NB_PIF0_PWRDOWN_1 0x01100013
112
113/*
114 * amd_chipset_gen values represent AMD different chipset generations
115 */
116enum amd_chipset_gen {
117 NOT_AMD_CHIPSET = 0,
118 AMD_CHIPSET_SB600,
119 AMD_CHIPSET_SB700,
120 AMD_CHIPSET_SB800,
121 AMD_CHIPSET_HUDSON2,
122 AMD_CHIPSET_BOLTON,
123 AMD_CHIPSET_YANGTZE,
124 AMD_CHIPSET_TAISHAN,
125 AMD_CHIPSET_UNKNOWN,
126};
127
128struct amd_chipset_type {
129 enum amd_chipset_gen gen;
130 u8 rev;
131};
132
133static struct amd_chipset_info {
134 struct pci_dev *nb_dev;
135 struct pci_dev *smbus_dev;
136 int nb_type;
137 struct amd_chipset_type sb_type;
138 int isoc_reqs;
139 int probe_count;
140 bool need_pll_quirk;
141} amd_chipset;
142
143static DEFINE_SPINLOCK(amd_lock);
144
145/*
146 * amd_chipset_sb_type_init - initialize amd chipset southbridge type
147 *
148 * AMD FCH/SB generation and revision is identified by SMBus controller
149 * vendor, device and revision IDs.
150 *
151 * Returns: 1 if it is an AMD chipset, 0 otherwise.
152 */
153static int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo)
154{
155 u8 rev = 0;
156 pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN;
157
158 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
159 PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
160 if (pinfo->smbus_dev) {
161 rev = pinfo->smbus_dev->revision;
162 if (rev >= 0x10 && rev <= 0x1f)
163 pinfo->sb_type.gen = AMD_CHIPSET_SB600;
164 else if (rev >= 0x30 && rev <= 0x3f)
165 pinfo->sb_type.gen = AMD_CHIPSET_SB700;
166 else if (rev >= 0x40 && rev <= 0x4f)
167 pinfo->sb_type.gen = AMD_CHIPSET_SB800;
168 } else {
169 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
170 PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
171
172 if (pinfo->smbus_dev) {
173 rev = pinfo->smbus_dev->revision;
174 if (rev >= 0x11 && rev <= 0x14)
175 pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
176 else if (rev >= 0x15 && rev <= 0x18)
177 pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
178 else if (rev >= 0x39 && rev <= 0x3a)
179 pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
180 } else {
181 pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
182 0x145c, NULL);
183 if (pinfo->smbus_dev) {
184 rev = pinfo->smbus_dev->revision;
185 pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN;
186 } else {
187 pinfo->sb_type.gen = NOT_AMD_CHIPSET;
188 return 0;
189 }
190 }
191 }
192 pinfo->sb_type.rev = rev;
193 return 1;
194}
195
196void sb800_prefetch(struct device *dev, int on)
197{
198 u16 misc;
199 struct pci_dev *pdev = to_pci_dev(dev);
200
201 pci_read_config_word(pdev, 0x50, &misc);
202 if (on == 0)
203 pci_write_config_word(pdev, 0x50, misc & 0xfcff);
204 else
205 pci_write_config_word(pdev, 0x50, misc | 0x0300);
206}
207EXPORT_SYMBOL_GPL(sb800_prefetch);
208
209static void usb_amd_find_chipset_info(void)
210{
211 unsigned long flags;
212 struct amd_chipset_info info = { };
213
214 spin_lock_irqsave(&amd_lock, flags);
215
216 /* probe only once */
217 if (amd_chipset.probe_count > 0) {
218 amd_chipset.probe_count++;
219 spin_unlock_irqrestore(&amd_lock, flags);
220 return;
221 }
222 spin_unlock_irqrestore(&amd_lock, flags);
223
224 if (!amd_chipset_sb_type_init(&info)) {
225 goto commit;
226 }
227
228 switch (info.sb_type.gen) {
229 case AMD_CHIPSET_SB700:
230 info.need_pll_quirk = info.sb_type.rev <= 0x3B;
231 break;
232 case AMD_CHIPSET_SB800:
233 case AMD_CHIPSET_HUDSON2:
234 case AMD_CHIPSET_BOLTON:
235 info.need_pll_quirk = true;
236 break;
237 default:
238 info.need_pll_quirk = false;
239 break;
240 }
241
242 if (!info.need_pll_quirk) {
243 if (info.smbus_dev) {
244 pci_dev_put(info.smbus_dev);
245 info.smbus_dev = NULL;
246 }
247 goto commit;
248 }
249
250 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9601, NULL);
251 if (info.nb_dev) {
252 info.nb_type = 1;
253 } else {
254 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL);
255 if (info.nb_dev) {
256 info.nb_type = 2;
257 } else {
258 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD,
259 0x9600, NULL);
260 if (info.nb_dev)
261 info.nb_type = 3;
262 }
263 }
264
265 printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n");
266
267commit:
268
269 spin_lock_irqsave(&amd_lock, flags);
270 if (amd_chipset.probe_count > 0) {
271 /* race - someone else was faster - drop devices */
272
273 /* Mark that we where here */
274 amd_chipset.probe_count++;
275
276 spin_unlock_irqrestore(&amd_lock, flags);
277
278 pci_dev_put(info.nb_dev);
279 pci_dev_put(info.smbus_dev);
280
281 } else {
282 /* no race - commit the result */
283 info.probe_count++;
284 amd_chipset = info;
285 spin_unlock_irqrestore(&amd_lock, flags);
286 }
287}
288
289int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev)
290{
291 /* Make sure amd chipset type has already been initialized */
292 usb_amd_find_chipset_info();
293 if (amd_chipset.sb_type.gen == AMD_CHIPSET_YANGTZE ||
294 amd_chipset.sb_type.gen == AMD_CHIPSET_TAISHAN) {
295 dev_dbg(&pdev->dev, "QUIRK: Enable AMD remote wakeup fix\n");
296 return 1;
297 }
298 return 0;
299}
300EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk);
301
302bool usb_amd_hang_symptom_quirk(void)
303{
304 u8 rev;
305
306 usb_amd_find_chipset_info();
307 rev = amd_chipset.sb_type.rev;
308 /* SB600 and old version of SB700 have hang symptom bug */
309 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 ||
310 (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
311 rev >= 0x3a && rev <= 0x3b);
312}
313EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk);
314
315bool usb_amd_prefetch_quirk(void)
316{
317 usb_amd_find_chipset_info();
318 /* SB800 needs pre-fetch fix */
319 return amd_chipset.sb_type.gen == AMD_CHIPSET_SB800;
320}
321EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk);
322
323bool usb_amd_quirk_pll_check(void)
324{
325 usb_amd_find_chipset_info();
326 return amd_chipset.need_pll_quirk;
327}
328EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_check);
329
330/*
331 * The hardware normally enables the A-link power management feature, which
332 * lets the system lower the power consumption in idle states.
333 *
334 * This USB quirk prevents the link going into that lower power state
335 * during isochronous transfers.
336 *
337 * Without this quirk, isochronous stream on OHCI/EHCI/xHCI controllers of
338 * some AMD platforms may stutter or have breaks occasionally.
339 */
340static void usb_amd_quirk_pll(int disable)
341{
342 u32 addr, addr_low, addr_high, val;
343 u32 bit = disable ? 0 : 1;
344 unsigned long flags;
345
346 spin_lock_irqsave(&amd_lock, flags);
347
348 if (disable) {
349 amd_chipset.isoc_reqs++;
350 if (amd_chipset.isoc_reqs > 1) {
351 spin_unlock_irqrestore(&amd_lock, flags);
352 return;
353 }
354 } else {
355 amd_chipset.isoc_reqs--;
356 if (amd_chipset.isoc_reqs > 0) {
357 spin_unlock_irqrestore(&amd_lock, flags);
358 return;
359 }
360 }
361
362 if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 ||
363 amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 ||
364 amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) {
365 outb_p(AB_REG_BAR_LOW, 0xcd6);
366 addr_low = inb_p(0xcd7);
367 outb_p(AB_REG_BAR_HIGH, 0xcd6);
368 addr_high = inb_p(0xcd7);
369 addr = addr_high << 8 | addr_low;
370
371 outl_p(0x30, AB_INDX(addr));
372 outl_p(0x40, AB_DATA(addr));
373 outl_p(0x34, AB_INDX(addr));
374 val = inl_p(AB_DATA(addr));
375 } else if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
376 amd_chipset.sb_type.rev <= 0x3b) {
377 pci_read_config_dword(amd_chipset.smbus_dev,
378 AB_REG_BAR_SB700, &addr);
379 outl(AX_INDXC, AB_INDX(addr));
380 outl(0x40, AB_DATA(addr));
381 outl(AX_DATAC, AB_INDX(addr));
382 val = inl(AB_DATA(addr));
383 } else {
384 spin_unlock_irqrestore(&amd_lock, flags);
385 return;
386 }
387
388 if (disable) {
389 val &= ~0x08;
390 val |= (1 << 4) | (1 << 9);
391 } else {
392 val |= 0x08;
393 val &= ~((1 << 4) | (1 << 9));
394 }
395 outl_p(val, AB_DATA(addr));
396
397 if (!amd_chipset.nb_dev) {
398 spin_unlock_irqrestore(&amd_lock, flags);
399 return;
400 }
401
402 if (amd_chipset.nb_type == 1 || amd_chipset.nb_type == 3) {
403 addr = PCIE_P_CNTL;
404 pci_write_config_dword(amd_chipset.nb_dev,
405 NB_PCIE_INDX_ADDR, addr);
406 pci_read_config_dword(amd_chipset.nb_dev,
407 NB_PCIE_INDX_DATA, &val);
408
409 val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12));
410 val |= bit | (bit << 3) | (bit << 12);
411 val |= ((!bit) << 4) | ((!bit) << 9);
412 pci_write_config_dword(amd_chipset.nb_dev,
413 NB_PCIE_INDX_DATA, val);
414
415 addr = BIF_NB;
416 pci_write_config_dword(amd_chipset.nb_dev,
417 NB_PCIE_INDX_ADDR, addr);
418 pci_read_config_dword(amd_chipset.nb_dev,
419 NB_PCIE_INDX_DATA, &val);
420 val &= ~(1 << 8);
421 val |= bit << 8;
422
423 pci_write_config_dword(amd_chipset.nb_dev,
424 NB_PCIE_INDX_DATA, val);
425 } else if (amd_chipset.nb_type == 2) {
426 addr = NB_PIF0_PWRDOWN_0;
427 pci_write_config_dword(amd_chipset.nb_dev,
428 NB_PCIE_INDX_ADDR, addr);
429 pci_read_config_dword(amd_chipset.nb_dev,
430 NB_PCIE_INDX_DATA, &val);
431 if (disable)
432 val &= ~(0x3f << 7);
433 else
434 val |= 0x3f << 7;
435
436 pci_write_config_dword(amd_chipset.nb_dev,
437 NB_PCIE_INDX_DATA, val);
438
439 addr = NB_PIF0_PWRDOWN_1;
440 pci_write_config_dword(amd_chipset.nb_dev,
441 NB_PCIE_INDX_ADDR, addr);
442 pci_read_config_dword(amd_chipset.nb_dev,
443 NB_PCIE_INDX_DATA, &val);
444 if (disable)
445 val &= ~(0x3f << 7);
446 else
447 val |= 0x3f << 7;
448
449 pci_write_config_dword(amd_chipset.nb_dev,
450 NB_PCIE_INDX_DATA, val);
451 }
452
453 spin_unlock_irqrestore(&amd_lock, flags);
454 return;
455}
456
457void usb_amd_quirk_pll_disable(void)
458{
459 usb_amd_quirk_pll(1);
460}
461EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable);
462
463void usb_amd_quirk_pll_enable(void)
464{
465 usb_amd_quirk_pll(0);
466}
467EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable);
468
469void usb_amd_dev_put(void)
470{
471 struct pci_dev *nb, *smbus;
472 unsigned long flags;
473
474 spin_lock_irqsave(&amd_lock, flags);
475
476 amd_chipset.probe_count--;
477 if (amd_chipset.probe_count > 0) {
478 spin_unlock_irqrestore(&amd_lock, flags);
479 return;
480 }
481
482 /* save them to pci_dev_put outside of spinlock */
483 nb = amd_chipset.nb_dev;
484 smbus = amd_chipset.smbus_dev;
485
486 amd_chipset.nb_dev = NULL;
487 amd_chipset.smbus_dev = NULL;
488 amd_chipset.nb_type = 0;
489 memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type));
490 amd_chipset.isoc_reqs = 0;
491 amd_chipset.need_pll_quirk = false;
492
493 spin_unlock_irqrestore(&amd_lock, flags);
494
495 pci_dev_put(nb);
496 pci_dev_put(smbus);
497}
498EXPORT_SYMBOL_GPL(usb_amd_dev_put);
499
500/*
501 * Check if port is disabled in BIOS on AMD Promontory host.
502 * BIOS Disabled ports may wake on connect/disconnect and need
503 * driver workaround to keep them disabled.
504 * Returns true if port is marked disabled.
505 */
506bool usb_amd_pt_check_port(struct device *device, int port)
507{
508 unsigned char value, port_shift;
509 struct pci_dev *pdev;
510 u16 reg;
511
512 pdev = to_pci_dev(device);
513 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_1_ADDR);
514
515 pci_read_config_byte(pdev, PT_READ_INDX, &value);
516 if (value != PT_SIG_1_DATA)
517 return false;
518
519 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_2_ADDR);
520
521 pci_read_config_byte(pdev, PT_READ_INDX, &value);
522 if (value != PT_SIG_2_DATA)
523 return false;
524
525 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_3_ADDR);
526
527 pci_read_config_byte(pdev, PT_READ_INDX, &value);
528 if (value != PT_SIG_3_DATA)
529 return false;
530
531 pci_write_config_word(pdev, PT_ADDR_INDX, PT_SIG_4_ADDR);
532
533 pci_read_config_byte(pdev, PT_READ_INDX, &value);
534 if (value != PT_SIG_4_DATA)
535 return false;
536
537 /* Check disabled port setting, if bit is set port is enabled */
538 switch (pdev->device) {
539 case 0x43b9:
540 case 0x43ba:
541 /*
542 * device is AMD_PROMONTORYA_4(0x43b9) or PROMONTORYA_3(0x43ba)
543 * PT4_P1_REG bits[7..1] represents USB2.0 ports 6 to 0
544 * PT4_P2_REG bits[6..0] represents ports 13 to 7
545 */
546 if (port > 6) {
547 reg = PT4_P2_REG;
548 port_shift = port - 7;
549 } else {
550 reg = PT4_P1_REG;
551 port_shift = port + 1;
552 }
553 break;
554 case 0x43bb:
555 /*
556 * device is AMD_PROMONTORYA_2(0x43bb)
557 * PT2_P1_REG bits[7..5] represents USB2.0 ports 2 to 0
558 * PT2_P2_REG bits[5..0] represents ports 9 to 3
559 */
560 if (port > 2) {
561 reg = PT2_P2_REG;
562 port_shift = port - 3;
563 } else {
564 reg = PT2_P1_REG;
565 port_shift = port + 5;
566 }
567 break;
568 case 0x43bc:
569 /*
570 * device is AMD_PROMONTORYA_1(0x43bc)
571 * PT1_P1_REG[7..4] represents USB2.0 ports 3 to 0
572 * PT1_P2_REG[5..0] represents ports 9 to 4
573 */
574 if (port > 3) {
575 reg = PT1_P2_REG;
576 port_shift = port - 4;
577 } else {
578 reg = PT1_P1_REG;
579 port_shift = port + 4;
580 }
581 break;
582 default:
583 return false;
584 }
585 pci_write_config_word(pdev, PT_ADDR_INDX, reg);
586 pci_read_config_byte(pdev, PT_READ_INDX, &value);
587
588 return !(value & BIT(port_shift));
589}
590EXPORT_SYMBOL_GPL(usb_amd_pt_check_port);
591#endif /* CONFIG_USB_PCI_AMD */
592
593static int usb_asmedia_wait_write(struct pci_dev *pdev)
594{
595 unsigned long retry_count;
596 unsigned char value;
597
598 for (retry_count = 1000; retry_count > 0; --retry_count) {
599
600 pci_read_config_byte(pdev, ASMT_CONTROL_REG, &value);
601
602 if (value == 0xff) {
603 dev_err(&pdev->dev, "%s: check_ready ERROR", __func__);
604 return -EIO;
605 }
606
607 if ((value & ASMT_CONTROL_WRITE_BIT) == 0)
608 return 0;
609
610 udelay(50);
611 }
612
613 dev_warn(&pdev->dev, "%s: check_write_ready timeout", __func__);
614 return -ETIMEDOUT;
615}
616
617void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev)
618{
619 if (usb_asmedia_wait_write(pdev) != 0)
620 return;
621
622 /* send command and address to device */
623 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_WRITEREG_CMD);
624 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_FLOWCTL_ADDR);
625 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
626
627 if (usb_asmedia_wait_write(pdev) != 0)
628 return;
629
630 /* send data to device */
631 pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_FLOWCTL_DATA);
632 pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_PSEUDO_DATA);
633 pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
634}
635EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol);
636
637static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask)
638{
639 u16 cmd;
640
641 return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask);
642}
643
644#define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY)
645
646#if defined(CONFIG_HAS_IOPORT) && IS_ENABLED(CONFIG_USB_UHCI_HCD)
647/*
648 * Make sure the controller is completely inactive, unable to
649 * generate interrupts or do DMA.
650 */
651void uhci_reset_hc(struct pci_dev *pdev, unsigned long base)
652{
653 /* Turn off PIRQ enable and SMI enable. (This also turns off the
654 * BIOS's USB Legacy Support.) Turn off all the R/WC bits too.
655 */
656 pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_RWC);
657
658 /* Reset the HC - this will force us to get a
659 * new notification of any already connected
660 * ports due to the virtual disconnect that it
661 * implies.
662 */
663 outw(UHCI_USBCMD_HCRESET, base + UHCI_USBCMD);
664 mb();
665 udelay(5);
666 if (inw(base + UHCI_USBCMD) & UHCI_USBCMD_HCRESET)
667 dev_warn(&pdev->dev, "HCRESET not completed yet!\n");
668
669 /* Just to be safe, disable interrupt requests and
670 * make sure the controller is stopped.
671 */
672 outw(0, base + UHCI_USBINTR);
673 outw(0, base + UHCI_USBCMD);
674}
675EXPORT_SYMBOL_GPL(uhci_reset_hc);
676
677/*
678 * Initialize a controller that was newly discovered or has just been
679 * resumed. In either case we can't be sure of its previous state.
680 *
681 * Returns: 1 if the controller was reset, 0 otherwise.
682 */
683int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base)
684{
685 u16 legsup;
686 unsigned int cmd, intr;
687
688 /*
689 * When restarting a suspended controller, we expect all the
690 * settings to be the same as we left them:
691 *
692 * PIRQ and SMI disabled, no R/W bits set in USBLEGSUP;
693 * Controller is stopped and configured with EGSM set;
694 * No interrupts enabled except possibly Resume Detect.
695 *
696 * If any of these conditions are violated we do a complete reset.
697 */
698 pci_read_config_word(pdev, UHCI_USBLEGSUP, &legsup);
699 if (legsup & ~(UHCI_USBLEGSUP_RO | UHCI_USBLEGSUP_RWC)) {
700 dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n",
701 __func__, legsup);
702 goto reset_needed;
703 }
704
705 cmd = inw(base + UHCI_USBCMD);
706 if ((cmd & UHCI_USBCMD_RUN) || !(cmd & UHCI_USBCMD_CONFIGURE) ||
707 !(cmd & UHCI_USBCMD_EGSM)) {
708 dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n",
709 __func__, cmd);
710 goto reset_needed;
711 }
712
713 intr = inw(base + UHCI_USBINTR);
714 if (intr & (~UHCI_USBINTR_RESUME)) {
715 dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n",
716 __func__, intr);
717 goto reset_needed;
718 }
719 return 0;
720
721reset_needed:
722 dev_dbg(&pdev->dev, "Performing full reset\n");
723 uhci_reset_hc(pdev, base);
724 return 1;
725}
726EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc);
727
728#define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO)
729
730static void quirk_usb_handoff_uhci(struct pci_dev *pdev)
731{
732 unsigned long base = 0;
733 int i;
734
735 if (!pio_enabled(pdev))
736 return;
737
738 for (i = 0; i < PCI_STD_NUM_BARS; i++)
739 if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
740 base = pci_resource_start(pdev, i);
741 break;
742 }
743
744 if (base)
745 uhci_check_and_reset_hc(pdev, base);
746}
747
748#else /* defined(CONFIG_HAS_IOPORT && IS_ENABLED(CONFIG_USB_UHCI_HCD) */
749
750static void quirk_usb_handoff_uhci(struct pci_dev *pdev) {}
751
752#endif /* defined(CONFIG_HAS_IOPORT && IS_ENABLED(CONFIG_USB_UHCI_HCD) */
753
754static int mmio_resource_enabled(struct pci_dev *pdev, int idx)
755{
756 return pci_resource_start(pdev, idx) && mmio_enabled(pdev);
757}
758
759static void quirk_usb_handoff_ohci(struct pci_dev *pdev)
760{
761 void __iomem *base;
762 u32 control;
763 u32 fminterval = 0;
764 bool no_fminterval = false;
765 int cnt;
766
767 if (!mmio_resource_enabled(pdev, 0))
768 return;
769
770 base = pci_ioremap_bar(pdev, 0);
771 if (base == NULL)
772 return;
773
774 /*
775 * ULi M5237 OHCI controller locks the whole system when accessing
776 * the OHCI_FMINTERVAL offset.
777 */
778 if (pdev->vendor == PCI_VENDOR_ID_AL && pdev->device == 0x5237)
779 no_fminterval = true;
780
781 control = readl(base + OHCI_CONTROL);
782
783/* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
784#ifdef __hppa__
785#define OHCI_CTRL_MASK (OHCI_CTRL_RWC | OHCI_CTRL_IR)
786#else
787#define OHCI_CTRL_MASK OHCI_CTRL_RWC
788
789 if (control & OHCI_CTRL_IR) {
790 int wait_time = 500; /* arbitrary; 5 seconds */
791 writel(OHCI_INTR_OC, base + OHCI_INTRENABLE);
792 writel(OHCI_OCR, base + OHCI_CMDSTATUS);
793 while (wait_time > 0 &&
794 readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) {
795 wait_time -= 10;
796 msleep(10);
797 }
798 if (wait_time <= 0)
799 dev_warn(&pdev->dev,
800 "OHCI: BIOS handoff failed (BIOS bug?) %08x\n",
801 readl(base + OHCI_CONTROL));
802 }
803#endif
804
805 /* disable interrupts */
806 writel((u32) ~0, base + OHCI_INTRDISABLE);
807
808 /* Go into the USB_RESET state, preserving RWC (and possibly IR) */
809 writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL);
810 readl(base + OHCI_CONTROL);
811
812 /* software reset of the controller, preserving HcFmInterval */
813 if (!no_fminterval)
814 fminterval = readl(base + OHCI_FMINTERVAL);
815
816 writel(OHCI_HCR, base + OHCI_CMDSTATUS);
817
818 /* reset requires max 10 us delay */
819 for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */
820 if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0)
821 break;
822 udelay(1);
823 }
824
825 if (!no_fminterval)
826 writel(fminterval, base + OHCI_FMINTERVAL);
827
828 /* Now the controller is safely in SUSPEND and nothing can wake it up */
829 iounmap(base);
830}
831
832static const struct dmi_system_id ehci_dmi_nohandoff_table[] = {
833 {
834 /* Pegatron Lucid (ExoPC) */
835 .matches = {
836 DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"),
837 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"),
838 },
839 },
840 {
841 /* Pegatron Lucid (Ordissimo AIRIS) */
842 .matches = {
843 DMI_MATCH(DMI_BOARD_NAME, "M11JB"),
844 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
845 },
846 },
847 {
848 /* Pegatron Lucid (Ordissimo) */
849 .matches = {
850 DMI_MATCH(DMI_BOARD_NAME, "Ordissimo"),
851 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
852 },
853 },
854 {
855 /* HASEE E200 */
856 .matches = {
857 DMI_MATCH(DMI_BOARD_VENDOR, "HASEE"),
858 DMI_MATCH(DMI_BOARD_NAME, "E210"),
859 DMI_MATCH(DMI_BIOS_VERSION, "6.00"),
860 },
861 },
862 { }
863};
864
865static void ehci_bios_handoff(struct pci_dev *pdev,
866 void __iomem *op_reg_base,
867 u32 cap, u8 offset)
868{
869 int try_handoff = 1, tried_handoff = 0;
870
871 /*
872 * The Pegatron Lucid tablet sporadically waits for 98 seconds trying
873 * the handoff on its unused controller. Skip it.
874 *
875 * The HASEE E200 hangs when the semaphore is set (bugzilla #77021).
876 */
877 if (pdev->vendor == 0x8086 && (pdev->device == 0x283a ||
878 pdev->device == 0x27cc)) {
879 if (dmi_check_system(ehci_dmi_nohandoff_table))
880 try_handoff = 0;
881 }
882
883 if (try_handoff && (cap & EHCI_USBLEGSUP_BIOS)) {
884 dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n");
885
886#if 0
887/* aleksey_gorelov@phoenix.com reports that some systems need SMI forced on,
888 * but that seems dubious in general (the BIOS left it off intentionally)
889 * and is known to prevent some systems from booting. so we won't do this
890 * unless maybe we can determine when we're on a system that needs SMI forced.
891 */
892 /* BIOS workaround (?): be sure the pre-Linux code
893 * receives the SMI
894 */
895 pci_read_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, &val);
896 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS,
897 val | EHCI_USBLEGCTLSTS_SOOE);
898#endif
899
900 /* some systems get upset if this semaphore is
901 * set for any other reason than forcing a BIOS
902 * handoff..
903 */
904 pci_write_config_byte(pdev, offset + 3, 1);
905 }
906
907 /* if boot firmware now owns EHCI, spin till it hands it over. */
908 if (try_handoff) {
909 int msec = 1000;
910 while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) {
911 tried_handoff = 1;
912 msleep(10);
913 msec -= 10;
914 pci_read_config_dword(pdev, offset, &cap);
915 }
916 }
917
918 if (cap & EHCI_USBLEGSUP_BIOS) {
919 /* well, possibly buggy BIOS... try to shut it down,
920 * and hope nothing goes too wrong
921 */
922 if (try_handoff)
923 dev_warn(&pdev->dev,
924 "EHCI: BIOS handoff failed (BIOS bug?) %08x\n",
925 cap);
926 pci_write_config_byte(pdev, offset + 2, 0);
927 }
928
929 /* just in case, always disable EHCI SMIs */
930 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0);
931
932 /* If the BIOS ever owned the controller then we can't expect
933 * any power sessions to remain intact.
934 */
935 if (tried_handoff)
936 writel(0, op_reg_base + EHCI_CONFIGFLAG);
937}
938
939static void quirk_usb_disable_ehci(struct pci_dev *pdev)
940{
941 void __iomem *base, *op_reg_base;
942 u32 hcc_params, cap, val;
943 u8 offset, cap_length;
944 int wait_time, count = 256/4;
945
946 if (!mmio_resource_enabled(pdev, 0))
947 return;
948
949 base = pci_ioremap_bar(pdev, 0);
950 if (base == NULL)
951 return;
952
953 cap_length = readb(base);
954 op_reg_base = base + cap_length;
955
956 /* EHCI 0.96 and later may have "extended capabilities"
957 * spec section 5.1 explains the bios handoff, e.g. for
958 * booting from USB disk or using a usb keyboard
959 */
960 hcc_params = readl(base + EHCI_HCC_PARAMS);
961 offset = (hcc_params >> 8) & 0xff;
962 while (offset && --count) {
963 pci_read_config_dword(pdev, offset, &cap);
964
965 switch (cap & 0xff) {
966 case 1:
967 ehci_bios_handoff(pdev, op_reg_base, cap, offset);
968 break;
969 case 0: /* Illegal reserved cap, set cap=0 so we exit */
970 cap = 0;
971 fallthrough;
972 default:
973 dev_warn(&pdev->dev,
974 "EHCI: unrecognized capability %02x\n",
975 cap & 0xff);
976 }
977 offset = (cap >> 8) & 0xff;
978 }
979 if (!count)
980 dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n");
981
982 /*
983 * halt EHCI & disable its interrupts in any case
984 */
985 val = readl(op_reg_base + EHCI_USBSTS);
986 if ((val & EHCI_USBSTS_HALTED) == 0) {
987 val = readl(op_reg_base + EHCI_USBCMD);
988 val &= ~EHCI_USBCMD_RUN;
989 writel(val, op_reg_base + EHCI_USBCMD);
990
991 wait_time = 2000;
992 do {
993 writel(0x3f, op_reg_base + EHCI_USBSTS);
994 udelay(100);
995 wait_time -= 100;
996 val = readl(op_reg_base + EHCI_USBSTS);
997 if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) {
998 break;
999 }
1000 } while (wait_time > 0);
1001 }
1002 writel(0, op_reg_base + EHCI_USBINTR);
1003 writel(0x3f, op_reg_base + EHCI_USBSTS);
1004
1005 iounmap(base);
1006}
1007
1008/*
1009 * handshake - spin reading a register until handshake completes
1010 * @ptr: address of hc register to be read
1011 * @mask: bits to look at in result of read
1012 * @done: value of those bits when handshake succeeds
1013 * @wait_usec: timeout in microseconds
1014 * @delay_usec: delay in microseconds to wait between polling
1015 *
1016 * Polls a register every delay_usec microseconds.
1017 * Returns 0 when the mask bits have the value done.
1018 * Returns -ETIMEDOUT if this condition is not true after
1019 * wait_usec microseconds have passed.
1020 */
1021static int handshake(void __iomem *ptr, u32 mask, u32 done,
1022 int wait_usec, int delay_usec)
1023{
1024 u32 result;
1025
1026 return readl_poll_timeout_atomic(ptr, result,
1027 ((result & mask) == done),
1028 delay_usec, wait_usec);
1029}
1030
1031/*
1032 * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that
1033 * share some number of ports. These ports can be switched between either
1034 * controller. Not all of the ports under the EHCI host controller may be
1035 * switchable.
1036 *
1037 * The ports should be switched over to xHCI before PCI probes for any device
1038 * start. This avoids active devices under EHCI being disconnected during the
1039 * port switchover, which could cause loss of data on USB storage devices, or
1040 * failed boot when the root file system is on a USB mass storage device and is
1041 * enumerated under EHCI first.
1042 *
1043 * We write into the xHC's PCI configuration space in some Intel-specific
1044 * registers to switch the ports over. The USB 3.0 terminations and the USB
1045 * 2.0 data wires are switched separately. We want to enable the SuperSpeed
1046 * terminations before switching the USB 2.0 wires over, so that USB 3.0
1047 * devices connect at SuperSpeed, rather than at USB 2.0 speeds.
1048 */
1049void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev)
1050{
1051 u32 ports_available;
1052 bool ehci_found = false;
1053 struct pci_dev *companion = NULL;
1054
1055 /* Sony VAIO t-series with subsystem device ID 90a8 is not capable of
1056 * switching ports from EHCI to xHCI
1057 */
1058 if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY &&
1059 xhci_pdev->subsystem_device == 0x90a8)
1060 return;
1061
1062 /* make sure an intel EHCI controller exists */
1063 for_each_pci_dev(companion) {
1064 if (companion->class == PCI_CLASS_SERIAL_USB_EHCI &&
1065 companion->vendor == PCI_VENDOR_ID_INTEL) {
1066 ehci_found = true;
1067 break;
1068 }
1069 }
1070
1071 if (!ehci_found)
1072 return;
1073
1074 /* Don't switchover the ports if the user hasn't compiled the xHCI
1075 * driver. Otherwise they will see "dead" USB ports that don't power
1076 * the devices.
1077 */
1078 if (!IS_ENABLED(CONFIG_USB_XHCI_HCD)) {
1079 dev_warn(&xhci_pdev->dev,
1080 "CONFIG_USB_XHCI_HCD is turned off, defaulting to EHCI.\n");
1081 dev_warn(&xhci_pdev->dev,
1082 "USB 3.0 devices will work at USB 2.0 speeds.\n");
1083 usb_disable_xhci_ports(xhci_pdev);
1084 return;
1085 }
1086
1087 /* Read USB3PRM, the USB 3.0 Port Routing Mask Register
1088 * Indicate the ports that can be changed from OS.
1089 */
1090 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3PRM,
1091 &ports_available);
1092
1093 dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n",
1094 ports_available);
1095
1096 /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable
1097 * Register, to turn on SuperSpeed terminations for the
1098 * switchable ports.
1099 */
1100 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN,
1101 ports_available);
1102
1103 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN,
1104 &ports_available);
1105 dev_dbg(&xhci_pdev->dev,
1106 "USB 3.0 ports that are now enabled under xHCI: 0x%x\n",
1107 ports_available);
1108
1109 /* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register
1110 * Indicate the USB 2.0 ports to be controlled by the xHCI host.
1111 */
1112
1113 pci_read_config_dword(xhci_pdev, USB_INTEL_USB2PRM,
1114 &ports_available);
1115
1116 dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n",
1117 ports_available);
1118
1119 /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to
1120 * switch the USB 2.0 power and data lines over to the xHCI
1121 * host.
1122 */
1123 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1124 ports_available);
1125
1126 pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1127 &ports_available);
1128 dev_dbg(&xhci_pdev->dev,
1129 "USB 2.0 ports that are now switched over to xHCI: 0x%x\n",
1130 ports_available);
1131}
1132EXPORT_SYMBOL_GPL(usb_enable_intel_xhci_ports);
1133
1134void usb_disable_xhci_ports(struct pci_dev *xhci_pdev)
1135{
1136 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 0x0);
1137 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 0x0);
1138}
1139EXPORT_SYMBOL_GPL(usb_disable_xhci_ports);
1140
1141/*
1142 * PCI Quirks for xHCI.
1143 *
1144 * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS.
1145 * It signals to the BIOS that the OS wants control of the host controller,
1146 * and then waits 1 second for the BIOS to hand over control.
1147 * If we timeout, assume the BIOS is broken and take control anyway.
1148 */
1149static void quirk_usb_handoff_xhci(struct pci_dev *pdev)
1150{
1151 void __iomem *base;
1152 int ext_cap_offset;
1153 void __iomem *op_reg_base;
1154 u32 val;
1155 int timeout;
1156 int len = pci_resource_len(pdev, 0);
1157
1158 if (!mmio_resource_enabled(pdev, 0))
1159 return;
1160
1161 base = ioremap(pci_resource_start(pdev, 0), len);
1162 if (base == NULL)
1163 return;
1164
1165 /*
1166 * Find the Legacy Support Capability register -
1167 * this is optional for xHCI host controllers.
1168 */
1169 ext_cap_offset = xhci_find_next_ext_cap(base, 0, XHCI_EXT_CAPS_LEGACY);
1170
1171 if (!ext_cap_offset)
1172 goto hc_init;
1173
1174 if ((ext_cap_offset + sizeof(val)) > len) {
1175 /* We're reading garbage from the controller */
1176 dev_warn(&pdev->dev, "xHCI controller failing to respond");
1177 goto iounmap;
1178 }
1179 val = readl(base + ext_cap_offset);
1180
1181 /* Auto handoff never worked for these devices. Force it and continue */
1182 if ((pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) ||
1183 (pdev->vendor == PCI_VENDOR_ID_RENESAS
1184 && pdev->device == 0x0014)) {
1185 val = (val | XHCI_HC_OS_OWNED) & ~XHCI_HC_BIOS_OWNED;
1186 writel(val, base + ext_cap_offset);
1187 }
1188
1189 /* If the BIOS owns the HC, signal that the OS wants it, and wait */
1190 if (val & XHCI_HC_BIOS_OWNED) {
1191 writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset);
1192
1193 /* Wait for 1 second with 10 microsecond polling interval */
1194 timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,
1195 0, 1000000, 10);
1196
1197 /* Assume a buggy BIOS and take HC ownership anyway */
1198 if (timeout) {
1199 dev_warn(&pdev->dev,
1200 "xHCI BIOS handoff failed (BIOS bug ?) %08x\n",
1201 val);
1202 writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset);
1203 }
1204 }
1205
1206 val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
1207 /* Mask off (turn off) any enabled SMIs */
1208 val &= XHCI_LEGACY_DISABLE_SMI;
1209 /* Mask all SMI events bits, RW1C */
1210 val |= XHCI_LEGACY_SMI_EVENTS;
1211 /* Disable any BIOS SMIs and clear all SMI events*/
1212 writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
1213
1214hc_init:
1215 if (pdev->vendor == PCI_VENDOR_ID_INTEL)
1216 usb_enable_intel_xhci_ports(pdev);
1217
1218 op_reg_base = base + XHCI_HC_LENGTH(readl(base));
1219
1220 /* Wait for the host controller to be ready before writing any
1221 * operational or runtime registers. Wait 5 seconds and no more.
1222 */
1223 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0,
1224 5000000, 10);
1225 /* Assume a buggy HC and start HC initialization anyway */
1226 if (timeout) {
1227 val = readl(op_reg_base + XHCI_STS_OFFSET);
1228 dev_warn(&pdev->dev,
1229 "xHCI HW not ready after 5 sec (HC bug?) status = 0x%x\n",
1230 val);
1231 }
1232
1233 /* Send the halt and disable interrupts command */
1234 val = readl(op_reg_base + XHCI_CMD_OFFSET);
1235 val &= ~(XHCI_CMD_RUN | XHCI_IRQS);
1236 writel(val, op_reg_base + XHCI_CMD_OFFSET);
1237
1238 /* Wait for the HC to halt - poll every 125 usec (one microframe). */
1239 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1,
1240 XHCI_MAX_HALT_USEC, 125);
1241 if (timeout) {
1242 val = readl(op_reg_base + XHCI_STS_OFFSET);
1243 dev_warn(&pdev->dev,
1244 "xHCI HW did not halt within %d usec status = 0x%x\n",
1245 XHCI_MAX_HALT_USEC, val);
1246 }
1247
1248iounmap:
1249 iounmap(base);
1250}
1251
1252static void quirk_usb_early_handoff(struct pci_dev *pdev)
1253{
1254 struct device_node *parent;
1255 bool is_rpi;
1256
1257 /* Skip Netlogic mips SoC's internal PCI USB controller.
1258 * This device does not need/support EHCI/OHCI handoff
1259 */
1260 if (pdev->vendor == 0x184e) /* vendor Netlogic */
1261 return;
1262
1263 /*
1264 * Bypass the Raspberry Pi 4 controller xHCI controller, things are
1265 * taken care of by the board's co-processor.
1266 */
1267 if (pdev->vendor == PCI_VENDOR_ID_VIA && pdev->device == 0x3483) {
1268 parent = of_get_parent(pdev->bus->dev.of_node);
1269 is_rpi = of_device_is_compatible(parent, "brcm,bcm2711-pcie");
1270 of_node_put(parent);
1271 if (is_rpi)
1272 return;
1273 }
1274
1275 if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&
1276 pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&
1277 pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
1278 pdev->class != PCI_CLASS_SERIAL_USB_XHCI)
1279 return;
1280
1281 if (pci_enable_device(pdev) < 0) {
1282 dev_warn(&pdev->dev,
1283 "Can't enable PCI device, BIOS handoff failed.\n");
1284 return;
1285 }
1286 if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI)
1287 quirk_usb_handoff_uhci(pdev);
1288 else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI)
1289 quirk_usb_handoff_ohci(pdev);
1290 else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI)
1291 quirk_usb_disable_ehci(pdev);
1292 else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI)
1293 quirk_usb_handoff_xhci(pdev);
1294 pci_disable_device(pdev);
1295}
1296DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
1297 PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff);
1/*
2 * This file contains code to reset and initialize USB host controllers.
3 * Some of it includes work-arounds for PCI hardware and BIOS quirks.
4 * It may need to run early during booting -- before USB would normally
5 * initialize -- to ensure that Linux doesn't use any legacy modes.
6 *
7 * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
8 * (and others)
9 */
10
11#include <linux/types.h>
12#include <linux/kconfig.h>
13#include <linux/kernel.h>
14#include <linux/pci.h>
15#include <linux/init.h>
16#include <linux/delay.h>
17#include <linux/export.h>
18#include <linux/acpi.h>
19#include <linux/dmi.h>
20#include "pci-quirks.h"
21#include "xhci-ext-caps.h"
22
23
24#define UHCI_USBLEGSUP 0xc0 /* legacy support */
25#define UHCI_USBCMD 0 /* command register */
26#define UHCI_USBINTR 4 /* interrupt register */
27#define UHCI_USBLEGSUP_RWC 0x8f00 /* the R/WC bits */
28#define UHCI_USBLEGSUP_RO 0x5040 /* R/O and reserved bits */
29#define UHCI_USBCMD_RUN 0x0001 /* RUN/STOP bit */
30#define UHCI_USBCMD_HCRESET 0x0002 /* Host Controller reset */
31#define UHCI_USBCMD_EGSM 0x0008 /* Global Suspend Mode */
32#define UHCI_USBCMD_CONFIGURE 0x0040 /* Config Flag */
33#define UHCI_USBINTR_RESUME 0x0002 /* Resume interrupt enable */
34
35#define OHCI_CONTROL 0x04
36#define OHCI_CMDSTATUS 0x08
37#define OHCI_INTRSTATUS 0x0c
38#define OHCI_INTRENABLE 0x10
39#define OHCI_INTRDISABLE 0x14
40#define OHCI_FMINTERVAL 0x34
41#define OHCI_HCFS (3 << 6) /* hc functional state */
42#define OHCI_HCR (1 << 0) /* host controller reset */
43#define OHCI_OCR (1 << 3) /* ownership change request */
44#define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
45#define OHCI_CTRL_IR (1 << 8) /* interrupt routing */
46#define OHCI_INTR_OC (1 << 30) /* ownership change */
47
48#define EHCI_HCC_PARAMS 0x08 /* extended capabilities */
49#define EHCI_USBCMD 0 /* command register */
50#define EHCI_USBCMD_RUN (1 << 0) /* RUN/STOP bit */
51#define EHCI_USBSTS 4 /* status register */
52#define EHCI_USBSTS_HALTED (1 << 12) /* HCHalted bit */
53#define EHCI_USBINTR 8 /* interrupt register */
54#define EHCI_CONFIGFLAG 0x40 /* configured flag register */
55#define EHCI_USBLEGSUP 0 /* legacy support register */
56#define EHCI_USBLEGSUP_BIOS (1 << 16) /* BIOS semaphore */
57#define EHCI_USBLEGSUP_OS (1 << 24) /* OS semaphore */
58#define EHCI_USBLEGCTLSTS 4 /* legacy control/status */
59#define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */
60
61/* AMD quirk use */
62#define AB_REG_BAR_LOW 0xe0
63#define AB_REG_BAR_HIGH 0xe1
64#define AB_REG_BAR_SB700 0xf0
65#define AB_INDX(addr) ((addr) + 0x00)
66#define AB_DATA(addr) ((addr) + 0x04)
67#define AX_INDXC 0x30
68#define AX_DATAC 0x34
69
70#define NB_PCIE_INDX_ADDR 0xe0
71#define NB_PCIE_INDX_DATA 0xe4
72#define PCIE_P_CNTL 0x10040
73#define BIF_NB 0x10002
74#define NB_PIF0_PWRDOWN_0 0x01100012
75#define NB_PIF0_PWRDOWN_1 0x01100013
76
77#define USB_INTEL_XUSB2PR 0xD0
78#define USB_INTEL_USB2PRM 0xD4
79#define USB_INTEL_USB3_PSSEN 0xD8
80#define USB_INTEL_USB3PRM 0xDC
81
82static struct amd_chipset_info {
83 struct pci_dev *nb_dev;
84 struct pci_dev *smbus_dev;
85 int nb_type;
86 int sb_type;
87 int isoc_reqs;
88 int probe_count;
89 int probe_result;
90} amd_chipset;
91
92static DEFINE_SPINLOCK(amd_lock);
93
94int usb_amd_find_chipset_info(void)
95{
96 u8 rev = 0;
97 unsigned long flags;
98 struct amd_chipset_info info;
99 int ret;
100
101 spin_lock_irqsave(&amd_lock, flags);
102
103 /* probe only once */
104 if (amd_chipset.probe_count > 0) {
105 amd_chipset.probe_count++;
106 spin_unlock_irqrestore(&amd_lock, flags);
107 return amd_chipset.probe_result;
108 }
109 memset(&info, 0, sizeof(info));
110 spin_unlock_irqrestore(&amd_lock, flags);
111
112 info.smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 0x4385, NULL);
113 if (info.smbus_dev) {
114 rev = info.smbus_dev->revision;
115 if (rev >= 0x40)
116 info.sb_type = 1;
117 else if (rev >= 0x30 && rev <= 0x3b)
118 info.sb_type = 3;
119 } else {
120 info.smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
121 0x780b, NULL);
122 if (!info.smbus_dev) {
123 ret = 0;
124 goto commit;
125 }
126
127 rev = info.smbus_dev->revision;
128 if (rev >= 0x11 && rev <= 0x18)
129 info.sb_type = 2;
130 }
131
132 if (info.sb_type == 0) {
133 if (info.smbus_dev) {
134 pci_dev_put(info.smbus_dev);
135 info.smbus_dev = NULL;
136 }
137 ret = 0;
138 goto commit;
139 }
140
141 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9601, NULL);
142 if (info.nb_dev) {
143 info.nb_type = 1;
144 } else {
145 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL);
146 if (info.nb_dev) {
147 info.nb_type = 2;
148 } else {
149 info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD,
150 0x9600, NULL);
151 if (info.nb_dev)
152 info.nb_type = 3;
153 }
154 }
155
156 ret = info.probe_result = 1;
157 printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n");
158
159commit:
160
161 spin_lock_irqsave(&amd_lock, flags);
162 if (amd_chipset.probe_count > 0) {
163 /* race - someone else was faster - drop devices */
164
165 /* Mark that we where here */
166 amd_chipset.probe_count++;
167 ret = amd_chipset.probe_result;
168
169 spin_unlock_irqrestore(&amd_lock, flags);
170
171 if (info.nb_dev)
172 pci_dev_put(info.nb_dev);
173 if (info.smbus_dev)
174 pci_dev_put(info.smbus_dev);
175
176 } else {
177 /* no race - commit the result */
178 info.probe_count++;
179 amd_chipset = info;
180 spin_unlock_irqrestore(&amd_lock, flags);
181 }
182
183 return ret;
184}
185EXPORT_SYMBOL_GPL(usb_amd_find_chipset_info);
186
187/*
188 * The hardware normally enables the A-link power management feature, which
189 * lets the system lower the power consumption in idle states.
190 *
191 * This USB quirk prevents the link going into that lower power state
192 * during isochronous transfers.
193 *
194 * Without this quirk, isochronous stream on OHCI/EHCI/xHCI controllers of
195 * some AMD platforms may stutter or have breaks occasionally.
196 */
197static void usb_amd_quirk_pll(int disable)
198{
199 u32 addr, addr_low, addr_high, val;
200 u32 bit = disable ? 0 : 1;
201 unsigned long flags;
202
203 spin_lock_irqsave(&amd_lock, flags);
204
205 if (disable) {
206 amd_chipset.isoc_reqs++;
207 if (amd_chipset.isoc_reqs > 1) {
208 spin_unlock_irqrestore(&amd_lock, flags);
209 return;
210 }
211 } else {
212 amd_chipset.isoc_reqs--;
213 if (amd_chipset.isoc_reqs > 0) {
214 spin_unlock_irqrestore(&amd_lock, flags);
215 return;
216 }
217 }
218
219 if (amd_chipset.sb_type == 1 || amd_chipset.sb_type == 2) {
220 outb_p(AB_REG_BAR_LOW, 0xcd6);
221 addr_low = inb_p(0xcd7);
222 outb_p(AB_REG_BAR_HIGH, 0xcd6);
223 addr_high = inb_p(0xcd7);
224 addr = addr_high << 8 | addr_low;
225
226 outl_p(0x30, AB_INDX(addr));
227 outl_p(0x40, AB_DATA(addr));
228 outl_p(0x34, AB_INDX(addr));
229 val = inl_p(AB_DATA(addr));
230 } else if (amd_chipset.sb_type == 3) {
231 pci_read_config_dword(amd_chipset.smbus_dev,
232 AB_REG_BAR_SB700, &addr);
233 outl(AX_INDXC, AB_INDX(addr));
234 outl(0x40, AB_DATA(addr));
235 outl(AX_DATAC, AB_INDX(addr));
236 val = inl(AB_DATA(addr));
237 } else {
238 spin_unlock_irqrestore(&amd_lock, flags);
239 return;
240 }
241
242 if (disable) {
243 val &= ~0x08;
244 val |= (1 << 4) | (1 << 9);
245 } else {
246 val |= 0x08;
247 val &= ~((1 << 4) | (1 << 9));
248 }
249 outl_p(val, AB_DATA(addr));
250
251 if (!amd_chipset.nb_dev) {
252 spin_unlock_irqrestore(&amd_lock, flags);
253 return;
254 }
255
256 if (amd_chipset.nb_type == 1 || amd_chipset.nb_type == 3) {
257 addr = PCIE_P_CNTL;
258 pci_write_config_dword(amd_chipset.nb_dev,
259 NB_PCIE_INDX_ADDR, addr);
260 pci_read_config_dword(amd_chipset.nb_dev,
261 NB_PCIE_INDX_DATA, &val);
262
263 val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12));
264 val |= bit | (bit << 3) | (bit << 12);
265 val |= ((!bit) << 4) | ((!bit) << 9);
266 pci_write_config_dword(amd_chipset.nb_dev,
267 NB_PCIE_INDX_DATA, val);
268
269 addr = BIF_NB;
270 pci_write_config_dword(amd_chipset.nb_dev,
271 NB_PCIE_INDX_ADDR, addr);
272 pci_read_config_dword(amd_chipset.nb_dev,
273 NB_PCIE_INDX_DATA, &val);
274 val &= ~(1 << 8);
275 val |= bit << 8;
276
277 pci_write_config_dword(amd_chipset.nb_dev,
278 NB_PCIE_INDX_DATA, val);
279 } else if (amd_chipset.nb_type == 2) {
280 addr = NB_PIF0_PWRDOWN_0;
281 pci_write_config_dword(amd_chipset.nb_dev,
282 NB_PCIE_INDX_ADDR, addr);
283 pci_read_config_dword(amd_chipset.nb_dev,
284 NB_PCIE_INDX_DATA, &val);
285 if (disable)
286 val &= ~(0x3f << 7);
287 else
288 val |= 0x3f << 7;
289
290 pci_write_config_dword(amd_chipset.nb_dev,
291 NB_PCIE_INDX_DATA, val);
292
293 addr = NB_PIF0_PWRDOWN_1;
294 pci_write_config_dword(amd_chipset.nb_dev,
295 NB_PCIE_INDX_ADDR, addr);
296 pci_read_config_dword(amd_chipset.nb_dev,
297 NB_PCIE_INDX_DATA, &val);
298 if (disable)
299 val &= ~(0x3f << 7);
300 else
301 val |= 0x3f << 7;
302
303 pci_write_config_dword(amd_chipset.nb_dev,
304 NB_PCIE_INDX_DATA, val);
305 }
306
307 spin_unlock_irqrestore(&amd_lock, flags);
308 return;
309}
310
311void usb_amd_quirk_pll_disable(void)
312{
313 usb_amd_quirk_pll(1);
314}
315EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable);
316
317void usb_amd_quirk_pll_enable(void)
318{
319 usb_amd_quirk_pll(0);
320}
321EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable);
322
323void usb_amd_dev_put(void)
324{
325 struct pci_dev *nb, *smbus;
326 unsigned long flags;
327
328 spin_lock_irqsave(&amd_lock, flags);
329
330 amd_chipset.probe_count--;
331 if (amd_chipset.probe_count > 0) {
332 spin_unlock_irqrestore(&amd_lock, flags);
333 return;
334 }
335
336 /* save them to pci_dev_put outside of spinlock */
337 nb = amd_chipset.nb_dev;
338 smbus = amd_chipset.smbus_dev;
339
340 amd_chipset.nb_dev = NULL;
341 amd_chipset.smbus_dev = NULL;
342 amd_chipset.nb_type = 0;
343 amd_chipset.sb_type = 0;
344 amd_chipset.isoc_reqs = 0;
345 amd_chipset.probe_result = 0;
346
347 spin_unlock_irqrestore(&amd_lock, flags);
348
349 if (nb)
350 pci_dev_put(nb);
351 if (smbus)
352 pci_dev_put(smbus);
353}
354EXPORT_SYMBOL_GPL(usb_amd_dev_put);
355
356/*
357 * Make sure the controller is completely inactive, unable to
358 * generate interrupts or do DMA.
359 */
360void uhci_reset_hc(struct pci_dev *pdev, unsigned long base)
361{
362 /* Turn off PIRQ enable and SMI enable. (This also turns off the
363 * BIOS's USB Legacy Support.) Turn off all the R/WC bits too.
364 */
365 pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_RWC);
366
367 /* Reset the HC - this will force us to get a
368 * new notification of any already connected
369 * ports due to the virtual disconnect that it
370 * implies.
371 */
372 outw(UHCI_USBCMD_HCRESET, base + UHCI_USBCMD);
373 mb();
374 udelay(5);
375 if (inw(base + UHCI_USBCMD) & UHCI_USBCMD_HCRESET)
376 dev_warn(&pdev->dev, "HCRESET not completed yet!\n");
377
378 /* Just to be safe, disable interrupt requests and
379 * make sure the controller is stopped.
380 */
381 outw(0, base + UHCI_USBINTR);
382 outw(0, base + UHCI_USBCMD);
383}
384EXPORT_SYMBOL_GPL(uhci_reset_hc);
385
386/*
387 * Initialize a controller that was newly discovered or has just been
388 * resumed. In either case we can't be sure of its previous state.
389 *
390 * Returns: 1 if the controller was reset, 0 otherwise.
391 */
392int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base)
393{
394 u16 legsup;
395 unsigned int cmd, intr;
396
397 /*
398 * When restarting a suspended controller, we expect all the
399 * settings to be the same as we left them:
400 *
401 * PIRQ and SMI disabled, no R/W bits set in USBLEGSUP;
402 * Controller is stopped and configured with EGSM set;
403 * No interrupts enabled except possibly Resume Detect.
404 *
405 * If any of these conditions are violated we do a complete reset.
406 */
407 pci_read_config_word(pdev, UHCI_USBLEGSUP, &legsup);
408 if (legsup & ~(UHCI_USBLEGSUP_RO | UHCI_USBLEGSUP_RWC)) {
409 dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n",
410 __func__, legsup);
411 goto reset_needed;
412 }
413
414 cmd = inw(base + UHCI_USBCMD);
415 if ((cmd & UHCI_USBCMD_RUN) || !(cmd & UHCI_USBCMD_CONFIGURE) ||
416 !(cmd & UHCI_USBCMD_EGSM)) {
417 dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n",
418 __func__, cmd);
419 goto reset_needed;
420 }
421
422 intr = inw(base + UHCI_USBINTR);
423 if (intr & (~UHCI_USBINTR_RESUME)) {
424 dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n",
425 __func__, intr);
426 goto reset_needed;
427 }
428 return 0;
429
430reset_needed:
431 dev_dbg(&pdev->dev, "Performing full reset\n");
432 uhci_reset_hc(pdev, base);
433 return 1;
434}
435EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc);
436
437static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask)
438{
439 u16 cmd;
440 return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask);
441}
442
443#define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO)
444#define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY)
445
446static void __devinit quirk_usb_handoff_uhci(struct pci_dev *pdev)
447{
448 unsigned long base = 0;
449 int i;
450
451 if (!pio_enabled(pdev))
452 return;
453
454 for (i = 0; i < PCI_ROM_RESOURCE; i++)
455 if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
456 base = pci_resource_start(pdev, i);
457 break;
458 }
459
460 if (base)
461 uhci_check_and_reset_hc(pdev, base);
462}
463
464static int __devinit mmio_resource_enabled(struct pci_dev *pdev, int idx)
465{
466 return pci_resource_start(pdev, idx) && mmio_enabled(pdev);
467}
468
469static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
470{
471 void __iomem *base;
472 u32 control;
473 u32 fminterval;
474 int cnt;
475
476 if (!mmio_resource_enabled(pdev, 0))
477 return;
478
479 base = pci_ioremap_bar(pdev, 0);
480 if (base == NULL)
481 return;
482
483 control = readl(base + OHCI_CONTROL);
484
485/* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
486#ifdef __hppa__
487#define OHCI_CTRL_MASK (OHCI_CTRL_RWC | OHCI_CTRL_IR)
488#else
489#define OHCI_CTRL_MASK OHCI_CTRL_RWC
490
491 if (control & OHCI_CTRL_IR) {
492 int wait_time = 500; /* arbitrary; 5 seconds */
493 writel(OHCI_INTR_OC, base + OHCI_INTRENABLE);
494 writel(OHCI_OCR, base + OHCI_CMDSTATUS);
495 while (wait_time > 0 &&
496 readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) {
497 wait_time -= 10;
498 msleep(10);
499 }
500 if (wait_time <= 0)
501 dev_warn(&pdev->dev, "OHCI: BIOS handoff failed"
502 " (BIOS bug?) %08x\n",
503 readl(base + OHCI_CONTROL));
504 }
505#endif
506
507 /* disable interrupts */
508 writel((u32) ~0, base + OHCI_INTRDISABLE);
509
510 /* Reset the USB bus, if the controller isn't already in RESET */
511 if (control & OHCI_HCFS) {
512 /* Go into RESET, preserving RWC (and possibly IR) */
513 writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL);
514 readl(base + OHCI_CONTROL);
515
516 /* drive bus reset for at least 50 ms (7.1.7.5) */
517 msleep(50);
518 }
519
520 /* software reset of the controller, preserving HcFmInterval */
521 fminterval = readl(base + OHCI_FMINTERVAL);
522 writel(OHCI_HCR, base + OHCI_CMDSTATUS);
523
524 /* reset requires max 10 us delay */
525 for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */
526 if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0)
527 break;
528 udelay(1);
529 }
530 writel(fminterval, base + OHCI_FMINTERVAL);
531
532 /* Now the controller is safely in SUSPEND and nothing can wake it up */
533 iounmap(base);
534}
535
536static const struct dmi_system_id __devinitconst ehci_dmi_nohandoff_table[] = {
537 {
538 /* Pegatron Lucid (ExoPC) */
539 .matches = {
540 DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"),
541 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"),
542 },
543 },
544 {
545 /* Pegatron Lucid (Ordissimo AIRIS) */
546 .matches = {
547 DMI_MATCH(DMI_BOARD_NAME, "M11JB"),
548 DMI_MATCH(DMI_BIOS_VERSION, "Lucid-GE-133"),
549 },
550 },
551 { }
552};
553
554static void __devinit ehci_bios_handoff(struct pci_dev *pdev,
555 void __iomem *op_reg_base,
556 u32 cap, u8 offset)
557{
558 int try_handoff = 1, tried_handoff = 0;
559
560 /* The Pegatron Lucid tablet sporadically waits for 98 seconds trying
561 * the handoff on its unused controller. Skip it. */
562 if (pdev->vendor == 0x8086 && pdev->device == 0x283a) {
563 if (dmi_check_system(ehci_dmi_nohandoff_table))
564 try_handoff = 0;
565 }
566
567 if (try_handoff && (cap & EHCI_USBLEGSUP_BIOS)) {
568 dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n");
569
570#if 0
571/* aleksey_gorelov@phoenix.com reports that some systems need SMI forced on,
572 * but that seems dubious in general (the BIOS left it off intentionally)
573 * and is known to prevent some systems from booting. so we won't do this
574 * unless maybe we can determine when we're on a system that needs SMI forced.
575 */
576 /* BIOS workaround (?): be sure the pre-Linux code
577 * receives the SMI
578 */
579 pci_read_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, &val);
580 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS,
581 val | EHCI_USBLEGCTLSTS_SOOE);
582#endif
583
584 /* some systems get upset if this semaphore is
585 * set for any other reason than forcing a BIOS
586 * handoff..
587 */
588 pci_write_config_byte(pdev, offset + 3, 1);
589 }
590
591 /* if boot firmware now owns EHCI, spin till it hands it over. */
592 if (try_handoff) {
593 int msec = 1000;
594 while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) {
595 tried_handoff = 1;
596 msleep(10);
597 msec -= 10;
598 pci_read_config_dword(pdev, offset, &cap);
599 }
600 }
601
602 if (cap & EHCI_USBLEGSUP_BIOS) {
603 /* well, possibly buggy BIOS... try to shut it down,
604 * and hope nothing goes too wrong
605 */
606 if (try_handoff)
607 dev_warn(&pdev->dev, "EHCI: BIOS handoff failed"
608 " (BIOS bug?) %08x\n", cap);
609 pci_write_config_byte(pdev, offset + 2, 0);
610 }
611
612 /* just in case, always disable EHCI SMIs */
613 pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0);
614
615 /* If the BIOS ever owned the controller then we can't expect
616 * any power sessions to remain intact.
617 */
618 if (tried_handoff)
619 writel(0, op_reg_base + EHCI_CONFIGFLAG);
620}
621
622static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)
623{
624 void __iomem *base, *op_reg_base;
625 u32 hcc_params, cap, val;
626 u8 offset, cap_length;
627 int wait_time, count = 256/4;
628
629 if (!mmio_resource_enabled(pdev, 0))
630 return;
631
632 base = pci_ioremap_bar(pdev, 0);
633 if (base == NULL)
634 return;
635
636 cap_length = readb(base);
637 op_reg_base = base + cap_length;
638
639 /* EHCI 0.96 and later may have "extended capabilities"
640 * spec section 5.1 explains the bios handoff, e.g. for
641 * booting from USB disk or using a usb keyboard
642 */
643 hcc_params = readl(base + EHCI_HCC_PARAMS);
644 offset = (hcc_params >> 8) & 0xff;
645 while (offset && --count) {
646 pci_read_config_dword(pdev, offset, &cap);
647
648 switch (cap & 0xff) {
649 case 1:
650 ehci_bios_handoff(pdev, op_reg_base, cap, offset);
651 break;
652 case 0: /* Illegal reserved cap, set cap=0 so we exit */
653 cap = 0; /* then fallthrough... */
654 default:
655 dev_warn(&pdev->dev, "EHCI: unrecognized capability "
656 "%02x\n", cap & 0xff);
657 }
658 offset = (cap >> 8) & 0xff;
659 }
660 if (!count)
661 dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n");
662
663 /*
664 * halt EHCI & disable its interrupts in any case
665 */
666 val = readl(op_reg_base + EHCI_USBSTS);
667 if ((val & EHCI_USBSTS_HALTED) == 0) {
668 val = readl(op_reg_base + EHCI_USBCMD);
669 val &= ~EHCI_USBCMD_RUN;
670 writel(val, op_reg_base + EHCI_USBCMD);
671
672 wait_time = 2000;
673 do {
674 writel(0x3f, op_reg_base + EHCI_USBSTS);
675 udelay(100);
676 wait_time -= 100;
677 val = readl(op_reg_base + EHCI_USBSTS);
678 if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) {
679 break;
680 }
681 } while (wait_time > 0);
682 }
683 writel(0, op_reg_base + EHCI_USBINTR);
684 writel(0x3f, op_reg_base + EHCI_USBSTS);
685
686 iounmap(base);
687}
688
689/*
690 * handshake - spin reading a register until handshake completes
691 * @ptr: address of hc register to be read
692 * @mask: bits to look at in result of read
693 * @done: value of those bits when handshake succeeds
694 * @wait_usec: timeout in microseconds
695 * @delay_usec: delay in microseconds to wait between polling
696 *
697 * Polls a register every delay_usec microseconds.
698 * Returns 0 when the mask bits have the value done.
699 * Returns -ETIMEDOUT if this condition is not true after
700 * wait_usec microseconds have passed.
701 */
702static int handshake(void __iomem *ptr, u32 mask, u32 done,
703 int wait_usec, int delay_usec)
704{
705 u32 result;
706
707 do {
708 result = readl(ptr);
709 result &= mask;
710 if (result == done)
711 return 0;
712 udelay(delay_usec);
713 wait_usec -= delay_usec;
714 } while (wait_usec > 0);
715 return -ETIMEDOUT;
716}
717
718#define PCI_DEVICE_ID_INTEL_LYNX_POINT_XHCI 0x8C31
719
720bool usb_is_intel_ppt_switchable_xhci(struct pci_dev *pdev)
721{
722 return pdev->class == PCI_CLASS_SERIAL_USB_XHCI &&
723 pdev->vendor == PCI_VENDOR_ID_INTEL &&
724 pdev->device == PCI_DEVICE_ID_INTEL_PANTHERPOINT_XHCI;
725}
726
727/* The Intel Lynx Point chipset also has switchable ports. */
728bool usb_is_intel_lpt_switchable_xhci(struct pci_dev *pdev)
729{
730 return pdev->class == PCI_CLASS_SERIAL_USB_XHCI &&
731 pdev->vendor == PCI_VENDOR_ID_INTEL &&
732 pdev->device == PCI_DEVICE_ID_INTEL_LYNX_POINT_XHCI;
733}
734
735bool usb_is_intel_switchable_xhci(struct pci_dev *pdev)
736{
737 return usb_is_intel_ppt_switchable_xhci(pdev) ||
738 usb_is_intel_lpt_switchable_xhci(pdev);
739}
740EXPORT_SYMBOL_GPL(usb_is_intel_switchable_xhci);
741
742/*
743 * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that
744 * share some number of ports. These ports can be switched between either
745 * controller. Not all of the ports under the EHCI host controller may be
746 * switchable.
747 *
748 * The ports should be switched over to xHCI before PCI probes for any device
749 * start. This avoids active devices under EHCI being disconnected during the
750 * port switchover, which could cause loss of data on USB storage devices, or
751 * failed boot when the root file system is on a USB mass storage device and is
752 * enumerated under EHCI first.
753 *
754 * We write into the xHC's PCI configuration space in some Intel-specific
755 * registers to switch the ports over. The USB 3.0 terminations and the USB
756 * 2.0 data wires are switched separately. We want to enable the SuperSpeed
757 * terminations before switching the USB 2.0 wires over, so that USB 3.0
758 * devices connect at SuperSpeed, rather than at USB 2.0 speeds.
759 */
760void usb_enable_xhci_ports(struct pci_dev *xhci_pdev)
761{
762 u32 ports_available;
763
764 /* Don't switchover the ports if the user hasn't compiled the xHCI
765 * driver. Otherwise they will see "dead" USB ports that don't power
766 * the devices.
767 */
768 if (!IS_ENABLED(CONFIG_USB_XHCI_HCD)) {
769 dev_warn(&xhci_pdev->dev,
770 "CONFIG_USB_XHCI_HCD is turned off, "
771 "defaulting to EHCI.\n");
772 dev_warn(&xhci_pdev->dev,
773 "USB 3.0 devices will work at USB 2.0 speeds.\n");
774 return;
775 }
776
777 /* Read USB3PRM, the USB 3.0 Port Routing Mask Register
778 * Indicate the ports that can be changed from OS.
779 */
780 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3PRM,
781 &ports_available);
782
783 dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n",
784 ports_available);
785
786 /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable
787 * Register, to turn on SuperSpeed terminations for the
788 * switchable ports.
789 */
790 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN,
791 cpu_to_le32(ports_available));
792
793 pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN,
794 &ports_available);
795 dev_dbg(&xhci_pdev->dev, "USB 3.0 ports that are now enabled "
796 "under xHCI: 0x%x\n", ports_available);
797
798 /* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register
799 * Indicate the USB 2.0 ports to be controlled by the xHCI host.
800 */
801
802 pci_read_config_dword(xhci_pdev, USB_INTEL_USB2PRM,
803 &ports_available);
804
805 dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n",
806 ports_available);
807
808 /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to
809 * switch the USB 2.0 power and data lines over to the xHCI
810 * host.
811 */
812 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
813 cpu_to_le32(ports_available));
814
815 pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
816 &ports_available);
817 dev_dbg(&xhci_pdev->dev, "USB 2.0 ports that are now switched over "
818 "to xHCI: 0x%x\n", ports_available);
819}
820EXPORT_SYMBOL_GPL(usb_enable_xhci_ports);
821
822void usb_disable_xhci_ports(struct pci_dev *xhci_pdev)
823{
824 pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 0x0);
825 pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 0x0);
826}
827EXPORT_SYMBOL_GPL(usb_disable_xhci_ports);
828
829/**
830 * PCI Quirks for xHCI.
831 *
832 * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS.
833 * It signals to the BIOS that the OS wants control of the host controller,
834 * and then waits 5 seconds for the BIOS to hand over control.
835 * If we timeout, assume the BIOS is broken and take control anyway.
836 */
837static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev)
838{
839 void __iomem *base;
840 int ext_cap_offset;
841 void __iomem *op_reg_base;
842 u32 val;
843 int timeout;
844 int len = pci_resource_len(pdev, 0);
845
846 if (!mmio_resource_enabled(pdev, 0))
847 return;
848
849 base = ioremap_nocache(pci_resource_start(pdev, 0), len);
850 if (base == NULL)
851 return;
852
853 /*
854 * Find the Legacy Support Capability register -
855 * this is optional for xHCI host controllers.
856 */
857 ext_cap_offset = xhci_find_next_cap_offset(base, XHCI_HCC_PARAMS_OFFSET);
858 do {
859 if ((ext_cap_offset + sizeof(val)) > len) {
860 /* We're reading garbage from the controller */
861 dev_warn(&pdev->dev,
862 "xHCI controller failing to respond");
863 return;
864 }
865
866 if (!ext_cap_offset)
867 /* We've reached the end of the extended capabilities */
868 goto hc_init;
869
870 val = readl(base + ext_cap_offset);
871 if (XHCI_EXT_CAPS_ID(val) == XHCI_EXT_CAPS_LEGACY)
872 break;
873 ext_cap_offset = xhci_find_next_cap_offset(base, ext_cap_offset);
874 } while (1);
875
876 /* If the BIOS owns the HC, signal that the OS wants it, and wait */
877 if (val & XHCI_HC_BIOS_OWNED) {
878 writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset);
879
880 /* Wait for 5 seconds with 10 microsecond polling interval */
881 timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,
882 0, 5000, 10);
883
884 /* Assume a buggy BIOS and take HC ownership anyway */
885 if (timeout) {
886 dev_warn(&pdev->dev, "xHCI BIOS handoff failed"
887 " (BIOS bug ?) %08x\n", val);
888 writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset);
889 }
890 }
891
892 val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
893 /* Mask off (turn off) any enabled SMIs */
894 val &= XHCI_LEGACY_DISABLE_SMI;
895 /* Mask all SMI events bits, RW1C */
896 val |= XHCI_LEGACY_SMI_EVENTS;
897 /* Disable any BIOS SMIs and clear all SMI events*/
898 writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
899
900hc_init:
901 if (usb_is_intel_switchable_xhci(pdev))
902 usb_enable_xhci_ports(pdev);
903
904 op_reg_base = base + XHCI_HC_LENGTH(readl(base));
905
906 /* Wait for the host controller to be ready before writing any
907 * operational or runtime registers. Wait 5 seconds and no more.
908 */
909 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0,
910 5000, 10);
911 /* Assume a buggy HC and start HC initialization anyway */
912 if (timeout) {
913 val = readl(op_reg_base + XHCI_STS_OFFSET);
914 dev_warn(&pdev->dev,
915 "xHCI HW not ready after 5 sec (HC bug?) "
916 "status = 0x%x\n", val);
917 }
918
919 /* Send the halt and disable interrupts command */
920 val = readl(op_reg_base + XHCI_CMD_OFFSET);
921 val &= ~(XHCI_CMD_RUN | XHCI_IRQS);
922 writel(val, op_reg_base + XHCI_CMD_OFFSET);
923
924 /* Wait for the HC to halt - poll every 125 usec (one microframe). */
925 timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1,
926 XHCI_MAX_HALT_USEC, 125);
927 if (timeout) {
928 val = readl(op_reg_base + XHCI_STS_OFFSET);
929 dev_warn(&pdev->dev,
930 "xHCI HW did not halt within %d usec "
931 "status = 0x%x\n", XHCI_MAX_HALT_USEC, val);
932 }
933
934 iounmap(base);
935}
936
937static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev)
938{
939 /* Skip Netlogic mips SoC's internal PCI USB controller.
940 * This device does not need/support EHCI/OHCI handoff
941 */
942 if (pdev->vendor == 0x184e) /* vendor Netlogic */
943 return;
944 if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&
945 pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&
946 pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
947 pdev->class != PCI_CLASS_SERIAL_USB_XHCI)
948 return;
949
950 if (pci_enable_device(pdev) < 0) {
951 dev_warn(&pdev->dev, "Can't enable PCI device, "
952 "BIOS handoff failed.\n");
953 return;
954 }
955 if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI)
956 quirk_usb_handoff_uhci(pdev);
957 else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI)
958 quirk_usb_handoff_ohci(pdev);
959 else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI)
960 quirk_usb_disable_ehci(pdev);
961 else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI)
962 quirk_usb_handoff_xhci(pdev);
963 pci_disable_device(pdev);
964}
965DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
966 PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff);