Commit | Line | Data |
---|---|---|
7586269c DB |
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 | ||
7586269c | 11 | #include <linux/types.h> |
51c9e6c7 | 12 | #include <linux/kconfig.h> |
7586269c DB |
13 | #include <linux/kernel.h> |
14 | #include <linux/pci.h> | |
7586269c | 15 | #include <linux/delay.h> |
f940fcd8 | 16 | #include <linux/export.h> |
7586269c | 17 | #include <linux/acpi.h> |
3610ea53 | 18 | #include <linux/dmi.h> |
75e2df60 | 19 | #include "pci-quirks.h" |
66d4eadd | 20 | #include "xhci-ext-caps.h" |
7586269c DB |
21 | |
22 | ||
7586269c DB |
23 | #define UHCI_USBLEGSUP 0xc0 /* legacy support */ |
24 | #define UHCI_USBCMD 0 /* command register */ | |
7586269c | 25 | #define UHCI_USBINTR 4 /* interrupt register */ |
bb200f6e AS |
26 | #define UHCI_USBLEGSUP_RWC 0x8f00 /* the R/WC bits */ |
27 | #define UHCI_USBLEGSUP_RO 0x5040 /* R/O and reserved bits */ | |
28 | #define UHCI_USBCMD_RUN 0x0001 /* RUN/STOP bit */ | |
29 | #define UHCI_USBCMD_HCRESET 0x0002 /* Host Controller reset */ | |
30 | #define UHCI_USBCMD_EGSM 0x0008 /* Global Suspend Mode */ | |
31 | #define UHCI_USBCMD_CONFIGURE 0x0040 /* Config Flag */ | |
32 | #define UHCI_USBINTR_RESUME 0x0002 /* Resume interrupt enable */ | |
7586269c DB |
33 | |
34 | #define OHCI_CONTROL 0x04 | |
35 | #define OHCI_CMDSTATUS 0x08 | |
36 | #define OHCI_INTRSTATUS 0x0c | |
37 | #define OHCI_INTRENABLE 0x10 | |
38 | #define OHCI_INTRDISABLE 0x14 | |
6ea12a04 | 39 | #define OHCI_FMINTERVAL 0x34 |
c6187597 | 40 | #define OHCI_HCFS (3 << 6) /* hc functional state */ |
6ea12a04 | 41 | #define OHCI_HCR (1 << 0) /* host controller reset */ |
7586269c | 42 | #define OHCI_OCR (1 << 3) /* ownership change request */ |
f2cb36c1 | 43 | #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */ |
7586269c DB |
44 | #define OHCI_CTRL_IR (1 << 8) /* interrupt routing */ |
45 | #define OHCI_INTR_OC (1 << 30) /* ownership change */ | |
46 | ||
47 | #define EHCI_HCC_PARAMS 0x08 /* extended capabilities */ | |
48 | #define EHCI_USBCMD 0 /* command register */ | |
49 | #define EHCI_USBCMD_RUN (1 << 0) /* RUN/STOP bit */ | |
50 | #define EHCI_USBSTS 4 /* status register */ | |
51 | #define EHCI_USBSTS_HALTED (1 << 12) /* HCHalted bit */ | |
52 | #define EHCI_USBINTR 8 /* interrupt register */ | |
4fe5354f | 53 | #define EHCI_CONFIGFLAG 0x40 /* configured flag register */ |
7586269c DB |
54 | #define EHCI_USBLEGSUP 0 /* legacy support register */ |
55 | #define EHCI_USBLEGSUP_BIOS (1 << 16) /* BIOS semaphore */ | |
56 | #define EHCI_USBLEGSUP_OS (1 << 24) /* OS semaphore */ | |
57 | #define EHCI_USBLEGCTLSTS 4 /* legacy control/status */ | |
58 | #define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */ | |
59 | ||
ad93562b AX |
60 | /* AMD quirk use */ |
61 | #define AB_REG_BAR_LOW 0xe0 | |
62 | #define AB_REG_BAR_HIGH 0xe1 | |
63 | #define AB_REG_BAR_SB700 0xf0 | |
64 | #define AB_INDX(addr) ((addr) + 0x00) | |
65 | #define AB_DATA(addr) ((addr) + 0x04) | |
66 | #define AX_INDXC 0x30 | |
67 | #define AX_DATAC 0x34 | |
68 | ||
69 | #define NB_PCIE_INDX_ADDR 0xe0 | |
70 | #define NB_PCIE_INDX_DATA 0xe4 | |
71 | #define PCIE_P_CNTL 0x10040 | |
72 | #define BIF_NB 0x10002 | |
73 | #define NB_PIF0_PWRDOWN_0 0x01100012 | |
74 | #define NB_PIF0_PWRDOWN_1 0x01100013 | |
75 | ||
69e848c2 | 76 | #define USB_INTEL_XUSB2PR 0xD0 |
a96874a2 | 77 | #define USB_INTEL_USB2PRM 0xD4 |
69e848c2 | 78 | #define USB_INTEL_USB3_PSSEN 0xD8 |
a96874a2 | 79 | #define USB_INTEL_USB3PRM 0xDC |
69e848c2 | 80 | |
22b4f0cd HR |
81 | /* |
82 | * amd_chipset_gen values represent AMD different chipset generations | |
83 | */ | |
84 | enum amd_chipset_gen { | |
85 | NOT_AMD_CHIPSET = 0, | |
86 | AMD_CHIPSET_SB600, | |
87 | AMD_CHIPSET_SB700, | |
88 | AMD_CHIPSET_SB800, | |
89 | AMD_CHIPSET_HUDSON2, | |
90 | AMD_CHIPSET_BOLTON, | |
91 | AMD_CHIPSET_YANGTZE, | |
92 | AMD_CHIPSET_UNKNOWN, | |
93 | }; | |
94 | ||
95 | struct amd_chipset_type { | |
96 | enum amd_chipset_gen gen; | |
97 | u8 rev; | |
98 | }; | |
99 | ||
ad93562b AX |
100 | static struct amd_chipset_info { |
101 | struct pci_dev *nb_dev; | |
102 | struct pci_dev *smbus_dev; | |
103 | int nb_type; | |
22b4f0cd | 104 | struct amd_chipset_type sb_type; |
ad93562b AX |
105 | int isoc_reqs; |
106 | int probe_count; | |
107 | int probe_result; | |
108 | } amd_chipset; | |
109 | ||
110 | static DEFINE_SPINLOCK(amd_lock); | |
111 | ||
22b4f0cd HR |
112 | /* |
113 | * amd_chipset_sb_type_init - initialize amd chipset southbridge type | |
114 | * | |
115 | * AMD FCH/SB generation and revision is identified by SMBus controller | |
116 | * vendor, device and revision IDs. | |
117 | * | |
118 | * Returns: 1 if it is an AMD chipset, 0 otherwise. | |
119 | */ | |
40b3dc6d | 120 | static int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo) |
22b4f0cd HR |
121 | { |
122 | u8 rev = 0; | |
123 | pinfo->sb_type.gen = AMD_CHIPSET_UNKNOWN; | |
124 | ||
125 | pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, | |
126 | PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL); | |
127 | if (pinfo->smbus_dev) { | |
128 | rev = pinfo->smbus_dev->revision; | |
129 | if (rev >= 0x10 && rev <= 0x1f) | |
130 | pinfo->sb_type.gen = AMD_CHIPSET_SB600; | |
131 | else if (rev >= 0x30 && rev <= 0x3f) | |
132 | pinfo->sb_type.gen = AMD_CHIPSET_SB700; | |
133 | else if (rev >= 0x40 && rev <= 0x4f) | |
134 | pinfo->sb_type.gen = AMD_CHIPSET_SB800; | |
135 | } else { | |
136 | pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, | |
137 | PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL); | |
138 | ||
139 | if (!pinfo->smbus_dev) { | |
140 | pinfo->sb_type.gen = NOT_AMD_CHIPSET; | |
141 | return 0; | |
142 | } | |
143 | ||
144 | rev = pinfo->smbus_dev->revision; | |
145 | if (rev >= 0x11 && rev <= 0x14) | |
146 | pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2; | |
147 | else if (rev >= 0x15 && rev <= 0x18) | |
148 | pinfo->sb_type.gen = AMD_CHIPSET_BOLTON; | |
149 | else if (rev >= 0x39 && rev <= 0x3a) | |
150 | pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE; | |
151 | } | |
152 | ||
153 | pinfo->sb_type.rev = rev; | |
154 | return 1; | |
155 | } | |
156 | ||
2621d011 MG |
157 | void sb800_prefetch(struct device *dev, int on) |
158 | { | |
159 | u16 misc; | |
160 | struct pci_dev *pdev = to_pci_dev(dev); | |
161 | ||
162 | pci_read_config_word(pdev, 0x50, &misc); | |
163 | if (on == 0) | |
164 | pci_write_config_word(pdev, 0x50, misc & 0xfcff); | |
165 | else | |
166 | pci_write_config_word(pdev, 0x50, misc | 0x0300); | |
167 | } | |
168 | EXPORT_SYMBOL_GPL(sb800_prefetch); | |
169 | ||
ad93562b AX |
170 | int usb_amd_find_chipset_info(void) |
171 | { | |
ad93562b | 172 | unsigned long flags; |
9ab7927b JR |
173 | struct amd_chipset_info info; |
174 | int ret; | |
ad93562b AX |
175 | |
176 | spin_lock_irqsave(&amd_lock, flags); | |
177 | ||
ad93562b | 178 | /* probe only once */ |
9ab7927b JR |
179 | if (amd_chipset.probe_count > 0) { |
180 | amd_chipset.probe_count++; | |
ad93562b AX |
181 | spin_unlock_irqrestore(&amd_lock, flags); |
182 | return amd_chipset.probe_result; | |
183 | } | |
9ab7927b JR |
184 | memset(&info, 0, sizeof(info)); |
185 | spin_unlock_irqrestore(&amd_lock, flags); | |
ad93562b | 186 | |
22b4f0cd HR |
187 | if (!amd_chipset_sb_type_init(&info)) { |
188 | ret = 0; | |
189 | goto commit; | |
ad93562b AX |
190 | } |
191 | ||
22b4f0cd HR |
192 | /* Below chipset generations needn't enable AMD PLL quirk */ |
193 | if (info.sb_type.gen == AMD_CHIPSET_UNKNOWN || | |
194 | info.sb_type.gen == AMD_CHIPSET_SB600 || | |
195 | info.sb_type.gen == AMD_CHIPSET_YANGTZE || | |
196 | (info.sb_type.gen == AMD_CHIPSET_SB700 && | |
197 | info.sb_type.rev > 0x3b)) { | |
9ab7927b JR |
198 | if (info.smbus_dev) { |
199 | pci_dev_put(info.smbus_dev); | |
200 | info.smbus_dev = NULL; | |
ad93562b | 201 | } |
9ab7927b JR |
202 | ret = 0; |
203 | goto commit; | |
ad93562b AX |
204 | } |
205 | ||
9ab7927b JR |
206 | info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9601, NULL); |
207 | if (info.nb_dev) { | |
208 | info.nb_type = 1; | |
ad93562b | 209 | } else { |
9ab7927b JR |
210 | info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL); |
211 | if (info.nb_dev) { | |
212 | info.nb_type = 2; | |
213 | } else { | |
214 | info.nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, | |
215 | 0x9600, NULL); | |
216 | if (info.nb_dev) | |
217 | info.nb_type = 3; | |
ad93562b AX |
218 | } |
219 | } | |
220 | ||
9ab7927b | 221 | ret = info.probe_result = 1; |
ad93562b AX |
222 | printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n"); |
223 | ||
9ab7927b JR |
224 | commit: |
225 | ||
226 | spin_lock_irqsave(&amd_lock, flags); | |
227 | if (amd_chipset.probe_count > 0) { | |
228 | /* race - someone else was faster - drop devices */ | |
229 | ||
230 | /* Mark that we where here */ | |
231 | amd_chipset.probe_count++; | |
232 | ret = amd_chipset.probe_result; | |
233 | ||
234 | spin_unlock_irqrestore(&amd_lock, flags); | |
235 | ||
f910b6cb ME |
236 | pci_dev_put(info.nb_dev); |
237 | pci_dev_put(info.smbus_dev); | |
9ab7927b JR |
238 | |
239 | } else { | |
240 | /* no race - commit the result */ | |
241 | info.probe_count++; | |
242 | amd_chipset = info; | |
243 | spin_unlock_irqrestore(&amd_lock, flags); | |
244 | } | |
245 | ||
246 | return ret; | |
ad93562b AX |
247 | } |
248 | EXPORT_SYMBOL_GPL(usb_amd_find_chipset_info); | |
249 | ||
7868943d HR |
250 | int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev) |
251 | { | |
252 | /* Make sure amd chipset type has already been initialized */ | |
253 | usb_amd_find_chipset_info(); | |
254 | if (amd_chipset.sb_type.gen != AMD_CHIPSET_YANGTZE) | |
255 | return 0; | |
256 | ||
257 | dev_dbg(&pdev->dev, "QUIRK: Enable AMD remote wakeup fix\n"); | |
258 | return 1; | |
259 | } | |
260 | EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk); | |
261 | ||
3ad145b6 HR |
262 | bool usb_amd_hang_symptom_quirk(void) |
263 | { | |
264 | u8 rev; | |
265 | ||
266 | usb_amd_find_chipset_info(); | |
267 | rev = amd_chipset.sb_type.rev; | |
268 | /* SB600 and old version of SB700 have hang symptom bug */ | |
269 | return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 || | |
270 | (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 && | |
271 | rev >= 0x3a && rev <= 0x3b); | |
272 | } | |
273 | EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk); | |
274 | ||
02c123ee HR |
275 | bool usb_amd_prefetch_quirk(void) |
276 | { | |
277 | usb_amd_find_chipset_info(); | |
278 | /* SB800 needs pre-fetch fix */ | |
279 | return amd_chipset.sb_type.gen == AMD_CHIPSET_SB800; | |
280 | } | |
281 | EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk); | |
282 | ||
ad93562b AX |
283 | /* |
284 | * The hardware normally enables the A-link power management feature, which | |
285 | * lets the system lower the power consumption in idle states. | |
286 | * | |
287 | * This USB quirk prevents the link going into that lower power state | |
288 | * during isochronous transfers. | |
289 | * | |
290 | * Without this quirk, isochronous stream on OHCI/EHCI/xHCI controllers of | |
291 | * some AMD platforms may stutter or have breaks occasionally. | |
292 | */ | |
293 | static void usb_amd_quirk_pll(int disable) | |
294 | { | |
295 | u32 addr, addr_low, addr_high, val; | |
296 | u32 bit = disable ? 0 : 1; | |
297 | unsigned long flags; | |
298 | ||
299 | spin_lock_irqsave(&amd_lock, flags); | |
300 | ||
301 | if (disable) { | |
302 | amd_chipset.isoc_reqs++; | |
303 | if (amd_chipset.isoc_reqs > 1) { | |
304 | spin_unlock_irqrestore(&amd_lock, flags); | |
305 | return; | |
306 | } | |
307 | } else { | |
308 | amd_chipset.isoc_reqs--; | |
309 | if (amd_chipset.isoc_reqs > 0) { | |
310 | spin_unlock_irqrestore(&amd_lock, flags); | |
311 | return; | |
312 | } | |
313 | } | |
314 | ||
22b4f0cd HR |
315 | if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 || |
316 | amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 || | |
317 | amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) { | |
ad93562b AX |
318 | outb_p(AB_REG_BAR_LOW, 0xcd6); |
319 | addr_low = inb_p(0xcd7); | |
320 | outb_p(AB_REG_BAR_HIGH, 0xcd6); | |
321 | addr_high = inb_p(0xcd7); | |
322 | addr = addr_high << 8 | addr_low; | |
323 | ||
324 | outl_p(0x30, AB_INDX(addr)); | |
325 | outl_p(0x40, AB_DATA(addr)); | |
326 | outl_p(0x34, AB_INDX(addr)); | |
327 | val = inl_p(AB_DATA(addr)); | |
22b4f0cd HR |
328 | } else if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 && |
329 | amd_chipset.sb_type.rev <= 0x3b) { | |
ad93562b AX |
330 | pci_read_config_dword(amd_chipset.smbus_dev, |
331 | AB_REG_BAR_SB700, &addr); | |
332 | outl(AX_INDXC, AB_INDX(addr)); | |
333 | outl(0x40, AB_DATA(addr)); | |
334 | outl(AX_DATAC, AB_INDX(addr)); | |
335 | val = inl(AB_DATA(addr)); | |
336 | } else { | |
337 | spin_unlock_irqrestore(&amd_lock, flags); | |
338 | return; | |
339 | } | |
340 | ||
341 | if (disable) { | |
342 | val &= ~0x08; | |
343 | val |= (1 << 4) | (1 << 9); | |
344 | } else { | |
345 | val |= 0x08; | |
346 | val &= ~((1 << 4) | (1 << 9)); | |
347 | } | |
348 | outl_p(val, AB_DATA(addr)); | |
349 | ||
350 | if (!amd_chipset.nb_dev) { | |
351 | spin_unlock_irqrestore(&amd_lock, flags); | |
352 | return; | |
353 | } | |
354 | ||
355 | if (amd_chipset.nb_type == 1 || amd_chipset.nb_type == 3) { | |
356 | addr = PCIE_P_CNTL; | |
357 | pci_write_config_dword(amd_chipset.nb_dev, | |
358 | NB_PCIE_INDX_ADDR, addr); | |
359 | pci_read_config_dword(amd_chipset.nb_dev, | |
360 | NB_PCIE_INDX_DATA, &val); | |
361 | ||
362 | val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12)); | |
363 | val |= bit | (bit << 3) | (bit << 12); | |
364 | val |= ((!bit) << 4) | ((!bit) << 9); | |
365 | pci_write_config_dword(amd_chipset.nb_dev, | |
366 | NB_PCIE_INDX_DATA, val); | |
367 | ||
368 | addr = BIF_NB; | |
369 | pci_write_config_dword(amd_chipset.nb_dev, | |
370 | NB_PCIE_INDX_ADDR, addr); | |
371 | pci_read_config_dword(amd_chipset.nb_dev, | |
372 | NB_PCIE_INDX_DATA, &val); | |
373 | val &= ~(1 << 8); | |
374 | val |= bit << 8; | |
375 | ||
376 | pci_write_config_dword(amd_chipset.nb_dev, | |
377 | NB_PCIE_INDX_DATA, val); | |
378 | } else if (amd_chipset.nb_type == 2) { | |
379 | addr = NB_PIF0_PWRDOWN_0; | |
380 | pci_write_config_dword(amd_chipset.nb_dev, | |
381 | NB_PCIE_INDX_ADDR, addr); | |
382 | pci_read_config_dword(amd_chipset.nb_dev, | |
383 | NB_PCIE_INDX_DATA, &val); | |
384 | if (disable) | |
385 | val &= ~(0x3f << 7); | |
386 | else | |
387 | val |= 0x3f << 7; | |
388 | ||
389 | pci_write_config_dword(amd_chipset.nb_dev, | |
390 | NB_PCIE_INDX_DATA, val); | |
391 | ||
392 | addr = NB_PIF0_PWRDOWN_1; | |
393 | pci_write_config_dword(amd_chipset.nb_dev, | |
394 | NB_PCIE_INDX_ADDR, addr); | |
395 | pci_read_config_dword(amd_chipset.nb_dev, | |
396 | NB_PCIE_INDX_DATA, &val); | |
397 | if (disable) | |
398 | val &= ~(0x3f << 7); | |
399 | else | |
400 | val |= 0x3f << 7; | |
401 | ||
402 | pci_write_config_dword(amd_chipset.nb_dev, | |
403 | NB_PCIE_INDX_DATA, val); | |
404 | } | |
405 | ||
406 | spin_unlock_irqrestore(&amd_lock, flags); | |
407 | return; | |
408 | } | |
409 | ||
410 | void usb_amd_quirk_pll_disable(void) | |
411 | { | |
412 | usb_amd_quirk_pll(1); | |
413 | } | |
414 | EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable); | |
415 | ||
416 | void usb_amd_quirk_pll_enable(void) | |
417 | { | |
418 | usb_amd_quirk_pll(0); | |
419 | } | |
420 | EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_enable); | |
421 | ||
422 | void usb_amd_dev_put(void) | |
423 | { | |
9ab7927b | 424 | struct pci_dev *nb, *smbus; |
ad93562b AX |
425 | unsigned long flags; |
426 | ||
427 | spin_lock_irqsave(&amd_lock, flags); | |
428 | ||
429 | amd_chipset.probe_count--; | |
430 | if (amd_chipset.probe_count > 0) { | |
431 | spin_unlock_irqrestore(&amd_lock, flags); | |
432 | return; | |
433 | } | |
434 | ||
9ab7927b JR |
435 | /* save them to pci_dev_put outside of spinlock */ |
436 | nb = amd_chipset.nb_dev; | |
437 | smbus = amd_chipset.smbus_dev; | |
438 | ||
439 | amd_chipset.nb_dev = NULL; | |
440 | amd_chipset.smbus_dev = NULL; | |
ad93562b | 441 | amd_chipset.nb_type = 0; |
22b4f0cd | 442 | memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type)); |
ad93562b AX |
443 | amd_chipset.isoc_reqs = 0; |
444 | amd_chipset.probe_result = 0; | |
445 | ||
446 | spin_unlock_irqrestore(&amd_lock, flags); | |
9ab7927b | 447 | |
f910b6cb ME |
448 | pci_dev_put(nb); |
449 | pci_dev_put(smbus); | |
ad93562b AX |
450 | } |
451 | EXPORT_SYMBOL_GPL(usb_amd_dev_put); | |
7586269c | 452 | |
bb200f6e AS |
453 | /* |
454 | * Make sure the controller is completely inactive, unable to | |
455 | * generate interrupts or do DMA. | |
456 | */ | |
457 | void uhci_reset_hc(struct pci_dev *pdev, unsigned long base) | |
458 | { | |
459 | /* Turn off PIRQ enable and SMI enable. (This also turns off the | |
460 | * BIOS's USB Legacy Support.) Turn off all the R/WC bits too. | |
461 | */ | |
462 | pci_write_config_word(pdev, UHCI_USBLEGSUP, UHCI_USBLEGSUP_RWC); | |
463 | ||
464 | /* Reset the HC - this will force us to get a | |
465 | * new notification of any already connected | |
466 | * ports due to the virtual disconnect that it | |
467 | * implies. | |
468 | */ | |
469 | outw(UHCI_USBCMD_HCRESET, base + UHCI_USBCMD); | |
470 | mb(); | |
471 | udelay(5); | |
472 | if (inw(base + UHCI_USBCMD) & UHCI_USBCMD_HCRESET) | |
473 | dev_warn(&pdev->dev, "HCRESET not completed yet!\n"); | |
474 | ||
475 | /* Just to be safe, disable interrupt requests and | |
476 | * make sure the controller is stopped. | |
477 | */ | |
478 | outw(0, base + UHCI_USBINTR); | |
479 | outw(0, base + UHCI_USBCMD); | |
480 | } | |
481 | EXPORT_SYMBOL_GPL(uhci_reset_hc); | |
482 | ||
483 | /* | |
484 | * Initialize a controller that was newly discovered or has just been | |
485 | * resumed. In either case we can't be sure of its previous state. | |
486 | * | |
487 | * Returns: 1 if the controller was reset, 0 otherwise. | |
488 | */ | |
489 | int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base) | |
490 | { | |
491 | u16 legsup; | |
492 | unsigned int cmd, intr; | |
493 | ||
494 | /* | |
495 | * When restarting a suspended controller, we expect all the | |
496 | * settings to be the same as we left them: | |
497 | * | |
498 | * PIRQ and SMI disabled, no R/W bits set in USBLEGSUP; | |
499 | * Controller is stopped and configured with EGSM set; | |
500 | * No interrupts enabled except possibly Resume Detect. | |
501 | * | |
502 | * If any of these conditions are violated we do a complete reset. | |
503 | */ | |
504 | pci_read_config_word(pdev, UHCI_USBLEGSUP, &legsup); | |
505 | if (legsup & ~(UHCI_USBLEGSUP_RO | UHCI_USBLEGSUP_RWC)) { | |
506 | dev_dbg(&pdev->dev, "%s: legsup = 0x%04x\n", | |
441b62c1 | 507 | __func__, legsup); |
bb200f6e AS |
508 | goto reset_needed; |
509 | } | |
510 | ||
511 | cmd = inw(base + UHCI_USBCMD); | |
512 | if ((cmd & UHCI_USBCMD_RUN) || !(cmd & UHCI_USBCMD_CONFIGURE) || | |
513 | !(cmd & UHCI_USBCMD_EGSM)) { | |
514 | dev_dbg(&pdev->dev, "%s: cmd = 0x%04x\n", | |
441b62c1 | 515 | __func__, cmd); |
bb200f6e AS |
516 | goto reset_needed; |
517 | } | |
518 | ||
519 | intr = inw(base + UHCI_USBINTR); | |
520 | if (intr & (~UHCI_USBINTR_RESUME)) { | |
521 | dev_dbg(&pdev->dev, "%s: intr = 0x%04x\n", | |
441b62c1 | 522 | __func__, intr); |
bb200f6e AS |
523 | goto reset_needed; |
524 | } | |
525 | return 0; | |
526 | ||
527 | reset_needed: | |
528 | dev_dbg(&pdev->dev, "Performing full reset\n"); | |
529 | uhci_reset_hc(pdev, base); | |
530 | return 1; | |
531 | } | |
532 | EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc); | |
533 | ||
541ab4af LT |
534 | static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask) |
535 | { | |
536 | u16 cmd; | |
537 | return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask); | |
538 | } | |
539 | ||
540 | #define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO) | |
541 | #define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY) | |
542 | ||
41ac7b3a | 543 | static void quirk_usb_handoff_uhci(struct pci_dev *pdev) |
7586269c DB |
544 | { |
545 | unsigned long base = 0; | |
7586269c DB |
546 | int i; |
547 | ||
541ab4af LT |
548 | if (!pio_enabled(pdev)) |
549 | return; | |
550 | ||
7586269c DB |
551 | for (i = 0; i < PCI_ROM_RESOURCE; i++) |
552 | if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) { | |
553 | base = pci_resource_start(pdev, i); | |
554 | break; | |
555 | } | |
556 | ||
bb200f6e AS |
557 | if (base) |
558 | uhci_check_and_reset_hc(pdev, base); | |
7586269c DB |
559 | } |
560 | ||
41ac7b3a | 561 | static int mmio_resource_enabled(struct pci_dev *pdev, int idx) |
541ab4af LT |
562 | { |
563 | return pci_resource_start(pdev, idx) && mmio_enabled(pdev); | |
564 | } | |
565 | ||
41ac7b3a | 566 | static void quirk_usb_handoff_ohci(struct pci_dev *pdev) |
7586269c DB |
567 | { |
568 | void __iomem *base; | |
3df7169e | 569 | u32 control; |
c6187597 AS |
570 | u32 fminterval; |
571 | int cnt; | |
7586269c | 572 | |
541ab4af LT |
573 | if (!mmio_resource_enabled(pdev, 0)) |
574 | return; | |
575 | ||
8e8ce4b6 AV |
576 | base = pci_ioremap_bar(pdev, 0); |
577 | if (base == NULL) | |
578 | return; | |
7586269c | 579 | |
3df7169e AS |
580 | control = readl(base + OHCI_CONTROL); |
581 | ||
f2cb36c1 | 582 | /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ |
3df7169e AS |
583 | #ifdef __hppa__ |
584 | #define OHCI_CTRL_MASK (OHCI_CTRL_RWC | OHCI_CTRL_IR) | |
585 | #else | |
586 | #define OHCI_CTRL_MASK OHCI_CTRL_RWC | |
587 | ||
f2cb36c1 | 588 | if (control & OHCI_CTRL_IR) { |
c1b45f24 | 589 | int wait_time = 500; /* arbitrary; 5 seconds */ |
7586269c DB |
590 | writel(OHCI_INTR_OC, base + OHCI_INTRENABLE); |
591 | writel(OHCI_OCR, base + OHCI_CMDSTATUS); | |
592 | while (wait_time > 0 && | |
593 | readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) { | |
594 | wait_time -= 10; | |
595 | msleep(10); | |
596 | } | |
f2cb36c1 | 597 | if (wait_time <= 0) |
f0fda801 | 598 | dev_warn(&pdev->dev, "OHCI: BIOS handoff failed" |
599 | " (BIOS bug?) %08x\n", | |
a38408cd | 600 | readl(base + OHCI_CONTROL)); |
7586269c | 601 | } |
f2cb36c1 | 602 | #endif |
7586269c | 603 | |
c6187597 AS |
604 | /* disable interrupts */ |
605 | writel((u32) ~0, base + OHCI_INTRDISABLE); | |
6ea12a04 | 606 | |
c6187597 AS |
607 | /* Reset the USB bus, if the controller isn't already in RESET */ |
608 | if (control & OHCI_HCFS) { | |
609 | /* Go into RESET, preserving RWC (and possibly IR) */ | |
610 | writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL); | |
611 | readl(base + OHCI_CONTROL); | |
6ea12a04 | 612 | |
c6187597 | 613 | /* drive bus reset for at least 50 ms (7.1.7.5) */ |
6ea12a04 | 614 | msleep(50); |
c6187597 | 615 | } |
6ea12a04 | 616 | |
c6187597 AS |
617 | /* software reset of the controller, preserving HcFmInterval */ |
618 | fminterval = readl(base + OHCI_FMINTERVAL); | |
619 | writel(OHCI_HCR, base + OHCI_CMDSTATUS); | |
6ea12a04 | 620 | |
c6187597 AS |
621 | /* reset requires max 10 us delay */ |
622 | for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */ | |
623 | if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0) | |
624 | break; | |
625 | udelay(1); | |
6ea12a04 | 626 | } |
c6187597 | 627 | writel(fminterval, base + OHCI_FMINTERVAL); |
3df7169e | 628 | |
c6187597 | 629 | /* Now the controller is safely in SUSPEND and nothing can wake it up */ |
7586269c DB |
630 | iounmap(base); |
631 | } | |
632 | ||
2f82686e | 633 | static const struct dmi_system_id ehci_dmi_nohandoff_table[] = { |
03c75362 AA |
634 | { |
635 | /* Pegatron Lucid (ExoPC) */ | |
636 | .matches = { | |
637 | DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"), | |
638 | DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"), | |
639 | }, | |
640 | }, | |
0c42a4e8 AA |
641 | { |
642 | /* Pegatron Lucid (Ordissimo AIRIS) */ | |
643 | .matches = { | |
644 | DMI_MATCH(DMI_BOARD_NAME, "M11JB"), | |
c323dc02 | 645 | DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"), |
0c42a4e8 AA |
646 | }, |
647 | }, | |
8daf8b60 AA |
648 | { |
649 | /* Pegatron Lucid (Ordissimo) */ | |
650 | .matches = { | |
651 | DMI_MATCH(DMI_BOARD_NAME, "Ordissimo"), | |
652 | DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"), | |
653 | }, | |
654 | }, | |
b0a50e92 AS |
655 | { |
656 | /* HASEE E200 */ | |
657 | .matches = { | |
658 | DMI_MATCH(DMI_BOARD_VENDOR, "HASEE"), | |
659 | DMI_MATCH(DMI_BOARD_NAME, "E210"), | |
660 | DMI_MATCH(DMI_BIOS_VERSION, "6.00"), | |
661 | }, | |
662 | }, | |
03c75362 AA |
663 | { } |
664 | }; | |
665 | ||
41ac7b3a | 666 | static void ehci_bios_handoff(struct pci_dev *pdev, |
5c853013 AR |
667 | void __iomem *op_reg_base, |
668 | u32 cap, u8 offset) | |
669 | { | |
3610ea53 AR |
670 | int try_handoff = 1, tried_handoff = 0; |
671 | ||
b0a50e92 AS |
672 | /* |
673 | * The Pegatron Lucid tablet sporadically waits for 98 seconds trying | |
674 | * the handoff on its unused controller. Skip it. | |
675 | * | |
676 | * The HASEE E200 hangs when the semaphore is set (bugzilla #77021). | |
677 | */ | |
678 | if (pdev->vendor == 0x8086 && (pdev->device == 0x283a || | |
679 | pdev->device == 0x27cc)) { | |
03c75362 | 680 | if (dmi_check_system(ehci_dmi_nohandoff_table)) |
3610ea53 AR |
681 | try_handoff = 0; |
682 | } | |
5c853013 | 683 | |
3610ea53 | 684 | if (try_handoff && (cap & EHCI_USBLEGSUP_BIOS)) { |
5c853013 AR |
685 | dev_dbg(&pdev->dev, "EHCI: BIOS handoff\n"); |
686 | ||
687 | #if 0 | |
688 | /* aleksey_gorelov@phoenix.com reports that some systems need SMI forced on, | |
689 | * but that seems dubious in general (the BIOS left it off intentionally) | |
690 | * and is known to prevent some systems from booting. so we won't do this | |
691 | * unless maybe we can determine when we're on a system that needs SMI forced. | |
692 | */ | |
693 | /* BIOS workaround (?): be sure the pre-Linux code | |
694 | * receives the SMI | |
695 | */ | |
696 | pci_read_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, &val); | |
697 | pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, | |
698 | val | EHCI_USBLEGCTLSTS_SOOE); | |
699 | #endif | |
700 | ||
701 | /* some systems get upset if this semaphore is | |
702 | * set for any other reason than forcing a BIOS | |
703 | * handoff.. | |
704 | */ | |
705 | pci_write_config_byte(pdev, offset + 3, 1); | |
706 | } | |
707 | ||
708 | /* if boot firmware now owns EHCI, spin till it hands it over. */ | |
3610ea53 AR |
709 | if (try_handoff) { |
710 | int msec = 1000; | |
711 | while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) { | |
712 | tried_handoff = 1; | |
713 | msleep(10); | |
714 | msec -= 10; | |
715 | pci_read_config_dword(pdev, offset, &cap); | |
716 | } | |
5c853013 AR |
717 | } |
718 | ||
719 | if (cap & EHCI_USBLEGSUP_BIOS) { | |
720 | /* well, possibly buggy BIOS... try to shut it down, | |
721 | * and hope nothing goes too wrong | |
722 | */ | |
3610ea53 AR |
723 | if (try_handoff) |
724 | dev_warn(&pdev->dev, "EHCI: BIOS handoff failed" | |
725 | " (BIOS bug?) %08x\n", cap); | |
5c853013 AR |
726 | pci_write_config_byte(pdev, offset + 2, 0); |
727 | } | |
728 | ||
729 | /* just in case, always disable EHCI SMIs */ | |
730 | pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0); | |
731 | ||
732 | /* If the BIOS ever owned the controller then we can't expect | |
733 | * any power sessions to remain intact. | |
734 | */ | |
735 | if (tried_handoff) | |
736 | writel(0, op_reg_base + EHCI_CONFIGFLAG); | |
737 | } | |
738 | ||
41ac7b3a | 739 | static void quirk_usb_disable_ehci(struct pci_dev *pdev) |
7586269c | 740 | { |
7586269c | 741 | void __iomem *base, *op_reg_base; |
5c853013 | 742 | u32 hcc_params, cap, val; |
401feafa | 743 | u8 offset, cap_length; |
97ff22ee | 744 | int wait_time, count = 256/4; |
7586269c | 745 | |
541ab4af LT |
746 | if (!mmio_resource_enabled(pdev, 0)) |
747 | return; | |
748 | ||
8e8ce4b6 AV |
749 | base = pci_ioremap_bar(pdev, 0); |
750 | if (base == NULL) | |
751 | return; | |
7586269c DB |
752 | |
753 | cap_length = readb(base); | |
754 | op_reg_base = base + cap_length; | |
401feafa DB |
755 | |
756 | /* EHCI 0.96 and later may have "extended capabilities" | |
757 | * spec section 5.1 explains the bios handoff, e.g. for | |
758 | * booting from USB disk or using a usb keyboard | |
759 | */ | |
7586269c | 760 | hcc_params = readl(base + EHCI_HCC_PARAMS); |
401feafa | 761 | offset = (hcc_params >> 8) & 0xff; |
6e14bda1 | 762 | while (offset && --count) { |
401feafa | 763 | pci_read_config_dword(pdev, offset, &cap); |
401feafa | 764 | |
5c853013 AR |
765 | switch (cap & 0xff) { |
766 | case 1: | |
767 | ehci_bios_handoff(pdev, op_reg_base, cap, offset); | |
401feafa | 768 | break; |
5c853013 AR |
769 | case 0: /* Illegal reserved cap, set cap=0 so we exit */ |
770 | cap = 0; /* then fallthrough... */ | |
401feafa | 771 | default: |
f0fda801 | 772 | dev_warn(&pdev->dev, "EHCI: unrecognized capability " |
5c853013 | 773 | "%02x\n", cap & 0xff); |
7586269c | 774 | } |
401feafa | 775 | offset = (cap >> 8) & 0xff; |
7586269c | 776 | } |
401feafa | 777 | if (!count) |
f0fda801 | 778 | dev_printk(KERN_DEBUG, &pdev->dev, "EHCI: capability loop?\n"); |
7586269c DB |
779 | |
780 | /* | |
781 | * halt EHCI & disable its interrupts in any case | |
782 | */ | |
783 | val = readl(op_reg_base + EHCI_USBSTS); | |
784 | if ((val & EHCI_USBSTS_HALTED) == 0) { | |
785 | val = readl(op_reg_base + EHCI_USBCMD); | |
786 | val &= ~EHCI_USBCMD_RUN; | |
787 | writel(val, op_reg_base + EHCI_USBCMD); | |
788 | ||
789 | wait_time = 2000; | |
7586269c DB |
790 | do { |
791 | writel(0x3f, op_reg_base + EHCI_USBSTS); | |
97ff22ee AS |
792 | udelay(100); |
793 | wait_time -= 100; | |
7586269c DB |
794 | val = readl(op_reg_base + EHCI_USBSTS); |
795 | if ((val == ~(u32)0) || (val & EHCI_USBSTS_HALTED)) { | |
796 | break; | |
797 | } | |
798 | } while (wait_time > 0); | |
799 | } | |
800 | writel(0, op_reg_base + EHCI_USBINTR); | |
801 | writel(0x3f, op_reg_base + EHCI_USBSTS); | |
802 | ||
803 | iounmap(base); | |
7586269c DB |
804 | } |
805 | ||
66d4eadd SS |
806 | /* |
807 | * handshake - spin reading a register until handshake completes | |
808 | * @ptr: address of hc register to be read | |
809 | * @mask: bits to look at in result of read | |
810 | * @done: value of those bits when handshake succeeds | |
811 | * @wait_usec: timeout in microseconds | |
812 | * @delay_usec: delay in microseconds to wait between polling | |
813 | * | |
814 | * Polls a register every delay_usec microseconds. | |
815 | * Returns 0 when the mask bits have the value done. | |
816 | * Returns -ETIMEDOUT if this condition is not true after | |
817 | * wait_usec microseconds have passed. | |
818 | */ | |
819 | static int handshake(void __iomem *ptr, u32 mask, u32 done, | |
820 | int wait_usec, int delay_usec) | |
821 | { | |
822 | u32 result; | |
823 | ||
824 | do { | |
825 | result = readl(ptr); | |
826 | result &= mask; | |
827 | if (result == done) | |
828 | return 0; | |
829 | udelay(delay_usec); | |
830 | wait_usec -= delay_usec; | |
831 | } while (wait_usec > 0); | |
832 | return -ETIMEDOUT; | |
833 | } | |
834 | ||
69e848c2 SS |
835 | /* |
836 | * Intel's Panther Point chipset has two host controllers (EHCI and xHCI) that | |
837 | * share some number of ports. These ports can be switched between either | |
838 | * controller. Not all of the ports under the EHCI host controller may be | |
839 | * switchable. | |
840 | * | |
841 | * The ports should be switched over to xHCI before PCI probes for any device | |
842 | * start. This avoids active devices under EHCI being disconnected during the | |
843 | * port switchover, which could cause loss of data on USB storage devices, or | |
844 | * failed boot when the root file system is on a USB mass storage device and is | |
845 | * enumerated under EHCI first. | |
846 | * | |
847 | * We write into the xHC's PCI configuration space in some Intel-specific | |
848 | * registers to switch the ports over. The USB 3.0 terminations and the USB | |
849 | * 2.0 data wires are switched separately. We want to enable the SuperSpeed | |
850 | * terminations before switching the USB 2.0 wires over, so that USB 3.0 | |
851 | * devices connect at SuperSpeed, rather than at USB 2.0 speeds. | |
852 | */ | |
26b76798 | 853 | void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev) |
69e848c2 SS |
854 | { |
855 | u32 ports_available; | |
26b76798 MN |
856 | bool ehci_found = false; |
857 | struct pci_dev *companion = NULL; | |
858 | ||
b38f09cc MN |
859 | /* Sony VAIO t-series with subsystem device ID 90a8 is not capable of |
860 | * switching ports from EHCI to xHCI | |
861 | */ | |
862 | if (xhci_pdev->subsystem_vendor == PCI_VENDOR_ID_SONY && | |
863 | xhci_pdev->subsystem_device == 0x90a8) | |
864 | return; | |
865 | ||
26b76798 MN |
866 | /* make sure an intel EHCI controller exists */ |
867 | for_each_pci_dev(companion) { | |
868 | if (companion->class == PCI_CLASS_SERIAL_USB_EHCI && | |
869 | companion->vendor == PCI_VENDOR_ID_INTEL) { | |
870 | ehci_found = true; | |
871 | break; | |
872 | } | |
873 | } | |
874 | ||
875 | if (!ehci_found) | |
876 | return; | |
69e848c2 | 877 | |
51c9e6c7 SS |
878 | /* Don't switchover the ports if the user hasn't compiled the xHCI |
879 | * driver. Otherwise they will see "dead" USB ports that don't power | |
880 | * the devices. | |
881 | */ | |
882 | if (!IS_ENABLED(CONFIG_USB_XHCI_HCD)) { | |
883 | dev_warn(&xhci_pdev->dev, | |
884 | "CONFIG_USB_XHCI_HCD is turned off, " | |
885 | "defaulting to EHCI.\n"); | |
886 | dev_warn(&xhci_pdev->dev, | |
887 | "USB 3.0 devices will work at USB 2.0 speeds.\n"); | |
58b2939b | 888 | usb_disable_xhci_ports(xhci_pdev); |
51c9e6c7 SS |
889 | return; |
890 | } | |
891 | ||
a96874a2 KYL |
892 | /* Read USB3PRM, the USB 3.0 Port Routing Mask Register |
893 | * Indicate the ports that can be changed from OS. | |
894 | */ | |
895 | pci_read_config_dword(xhci_pdev, USB_INTEL_USB3PRM, | |
896 | &ports_available); | |
897 | ||
898 | dev_dbg(&xhci_pdev->dev, "Configurable ports to enable SuperSpeed: 0x%x\n", | |
899 | ports_available); | |
900 | ||
69e848c2 | 901 | /* Write USB3_PSSEN, the USB 3.0 Port SuperSpeed Enable |
a96874a2 KYL |
902 | * Register, to turn on SuperSpeed terminations for the |
903 | * switchable ports. | |
69e848c2 SS |
904 | */ |
905 | pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, | |
e4599339 | 906 | ports_available); |
69e848c2 SS |
907 | |
908 | pci_read_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, | |
909 | &ports_available); | |
910 | dev_dbg(&xhci_pdev->dev, "USB 3.0 ports that are now enabled " | |
911 | "under xHCI: 0x%x\n", ports_available); | |
912 | ||
a96874a2 KYL |
913 | /* Read XUSB2PRM, xHCI USB 2.0 Port Routing Mask Register |
914 | * Indicate the USB 2.0 ports to be controlled by the xHCI host. | |
915 | */ | |
916 | ||
917 | pci_read_config_dword(xhci_pdev, USB_INTEL_USB2PRM, | |
918 | &ports_available); | |
919 | ||
920 | dev_dbg(&xhci_pdev->dev, "Configurable USB 2.0 ports to hand over to xCHI: 0x%x\n", | |
921 | ports_available); | |
922 | ||
69e848c2 SS |
923 | /* Write XUSB2PR, the xHC USB 2.0 Port Routing Register, to |
924 | * switch the USB 2.0 power and data lines over to the xHCI | |
925 | * host. | |
926 | */ | |
927 | pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, | |
e4599339 | 928 | ports_available); |
69e848c2 SS |
929 | |
930 | pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, | |
931 | &ports_available); | |
932 | dev_dbg(&xhci_pdev->dev, "USB 2.0 ports that are now switched over " | |
933 | "to xHCI: 0x%x\n", ports_available); | |
934 | } | |
26b76798 | 935 | EXPORT_SYMBOL_GPL(usb_enable_intel_xhci_ports); |
69e848c2 | 936 | |
e95829f4 SS |
937 | void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) |
938 | { | |
939 | pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN, 0x0); | |
940 | pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR, 0x0); | |
941 | } | |
942 | EXPORT_SYMBOL_GPL(usb_disable_xhci_ports); | |
943 | ||
66d4eadd SS |
944 | /** |
945 | * PCI Quirks for xHCI. | |
946 | * | |
947 | * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS. | |
948 | * It signals to the BIOS that the OS wants control of the host controller, | |
949 | * and then waits 5 seconds for the BIOS to hand over control. | |
950 | * If we timeout, assume the BIOS is broken and take control anyway. | |
951 | */ | |
41ac7b3a | 952 | static void quirk_usb_handoff_xhci(struct pci_dev *pdev) |
66d4eadd SS |
953 | { |
954 | void __iomem *base; | |
955 | int ext_cap_offset; | |
956 | void __iomem *op_reg_base; | |
957 | u32 val; | |
958 | int timeout; | |
e955a1cd | 959 | int len = pci_resource_len(pdev, 0); |
66d4eadd SS |
960 | |
961 | if (!mmio_resource_enabled(pdev, 0)) | |
962 | return; | |
963 | ||
e955a1cd | 964 | base = ioremap_nocache(pci_resource_start(pdev, 0), len); |
66d4eadd SS |
965 | if (base == NULL) |
966 | return; | |
7586269c | 967 | |
66d4eadd SS |
968 | /* |
969 | * Find the Legacy Support Capability register - | |
970 | * this is optional for xHCI host controllers. | |
971 | */ | |
972 | ext_cap_offset = xhci_find_next_cap_offset(base, XHCI_HCC_PARAMS_OFFSET); | |
973 | do { | |
e955a1cd MG |
974 | if ((ext_cap_offset + sizeof(val)) > len) { |
975 | /* We're reading garbage from the controller */ | |
976 | dev_warn(&pdev->dev, | |
977 | "xHCI controller failing to respond"); | |
978 | return; | |
979 | } | |
980 | ||
66d4eadd SS |
981 | if (!ext_cap_offset) |
982 | /* We've reached the end of the extended capabilities */ | |
983 | goto hc_init; | |
e955a1cd | 984 | |
66d4eadd SS |
985 | val = readl(base + ext_cap_offset); |
986 | if (XHCI_EXT_CAPS_ID(val) == XHCI_EXT_CAPS_LEGACY) | |
987 | break; | |
988 | ext_cap_offset = xhci_find_next_cap_offset(base, ext_cap_offset); | |
989 | } while (1); | |
990 | ||
991 | /* If the BIOS owns the HC, signal that the OS wants it, and wait */ | |
992 | if (val & XHCI_HC_BIOS_OWNED) { | |
6768458b | 993 | writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset); |
66d4eadd SS |
994 | |
995 | /* Wait for 5 seconds with 10 microsecond polling interval */ | |
996 | timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED, | |
997 | 0, 5000, 10); | |
998 | ||
999 | /* Assume a buggy BIOS and take HC ownership anyway */ | |
1000 | if (timeout) { | |
1001 | dev_warn(&pdev->dev, "xHCI BIOS handoff failed" | |
1002 | " (BIOS bug ?) %08x\n", val); | |
1003 | writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset); | |
1004 | } | |
1005 | } | |
1006 | ||
95018a53 AH |
1007 | val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); |
1008 | /* Mask off (turn off) any enabled SMIs */ | |
1009 | val &= XHCI_LEGACY_DISABLE_SMI; | |
1010 | /* Mask all SMI events bits, RW1C */ | |
1011 | val |= XHCI_LEGACY_SMI_EVENTS; | |
1012 | /* Disable any BIOS SMIs and clear all SMI events*/ | |
1013 | writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); | |
66d4eadd | 1014 | |
29d21457 | 1015 | hc_init: |
26b76798 MN |
1016 | if (pdev->vendor == PCI_VENDOR_ID_INTEL) |
1017 | usb_enable_intel_xhci_ports(pdev); | |
29d21457 | 1018 | |
66d4eadd SS |
1019 | op_reg_base = base + XHCI_HC_LENGTH(readl(base)); |
1020 | ||
1021 | /* Wait for the host controller to be ready before writing any | |
1022 | * operational or runtime registers. Wait 5 seconds and no more. | |
1023 | */ | |
1024 | timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0, | |
1025 | 5000, 10); | |
1026 | /* Assume a buggy HC and start HC initialization anyway */ | |
1027 | if (timeout) { | |
1028 | val = readl(op_reg_base + XHCI_STS_OFFSET); | |
1029 | dev_warn(&pdev->dev, | |
1030 | "xHCI HW not ready after 5 sec (HC bug?) " | |
1031 | "status = 0x%x\n", val); | |
1032 | } | |
1033 | ||
1034 | /* Send the halt and disable interrupts command */ | |
1035 | val = readl(op_reg_base + XHCI_CMD_OFFSET); | |
1036 | val &= ~(XHCI_CMD_RUN | XHCI_IRQS); | |
1037 | writel(val, op_reg_base + XHCI_CMD_OFFSET); | |
1038 | ||
1039 | /* Wait for the HC to halt - poll every 125 usec (one microframe). */ | |
1040 | timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1, | |
1041 | XHCI_MAX_HALT_USEC, 125); | |
1042 | if (timeout) { | |
1043 | val = readl(op_reg_base + XHCI_STS_OFFSET); | |
1044 | dev_warn(&pdev->dev, | |
1045 | "xHCI HW did not halt within %d usec " | |
1046 | "status = 0x%x\n", XHCI_MAX_HALT_USEC, val); | |
1047 | } | |
1048 | ||
1049 | iounmap(base); | |
1050 | } | |
7586269c | 1051 | |
41ac7b3a | 1052 | static void quirk_usb_early_handoff(struct pci_dev *pdev) |
7586269c | 1053 | { |
e4436a7c J |
1054 | /* Skip Netlogic mips SoC's internal PCI USB controller. |
1055 | * This device does not need/support EHCI/OHCI handoff | |
1056 | */ | |
1057 | if (pdev->vendor == 0x184e) /* vendor Netlogic */ | |
1058 | return; | |
cab928ee SS |
1059 | if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI && |
1060 | pdev->class != PCI_CLASS_SERIAL_USB_OHCI && | |
1061 | pdev->class != PCI_CLASS_SERIAL_USB_EHCI && | |
1062 | pdev->class != PCI_CLASS_SERIAL_USB_XHCI) | |
1063 | return; | |
e4436a7c | 1064 | |
cab928ee SS |
1065 | if (pci_enable_device(pdev) < 0) { |
1066 | dev_warn(&pdev->dev, "Can't enable PCI device, " | |
1067 | "BIOS handoff failed.\n"); | |
1068 | return; | |
1069 | } | |
478a3bab | 1070 | if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI) |
7586269c | 1071 | quirk_usb_handoff_uhci(pdev); |
478a3bab | 1072 | else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI) |
7586269c | 1073 | quirk_usb_handoff_ohci(pdev); |
478a3bab | 1074 | else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI) |
7586269c | 1075 | quirk_usb_disable_ehci(pdev); |
66d4eadd SS |
1076 | else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI) |
1077 | quirk_usb_handoff_xhci(pdev); | |
cab928ee | 1078 | pci_disable_device(pdev); |
7586269c | 1079 | } |
8474ecd9 YL |
1080 | DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, |
1081 | PCI_CLASS_SERIAL_USB, 8, quirk_usb_early_handoff); |