Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6
[pandora-kernel.git] / drivers / usb / host / ehci-pci.c
1 /*
2  * EHCI HCD (Host Controller Driver) PCI Bus Glue.
3  *
4  * Copyright (c) 2000-2004 by David Brownell
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License as published by the
8  * Free Software Foundation; either version 2 of the License, or (at your
9  * option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software Foundation,
18  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  */
20
21 #ifndef CONFIG_PCI
22 #error "This file is PCI bus glue.  CONFIG_PCI must be defined."
23 #endif
24
25 /* defined here to avoid adding to pci_ids.h for single instance use */
26 #define PCI_DEVICE_ID_INTEL_CE4100_USB  0x2e70
27
28 /*-------------------------------------------------------------------------*/
29
30 /* called after powerup, by probe or system-pm "wakeup" */
31 static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
32 {
33         int                     retval;
34
35         /* we expect static quirk code to handle the "extended capabilities"
36          * (currently just BIOS handoff) allowed starting with EHCI 0.96
37          */
38
39         /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
40         retval = pci_set_mwi(pdev);
41         if (!retval)
42                 ehci_dbg(ehci, "MWI active\n");
43
44         return 0;
45 }
46
47 static int ehci_quirk_amd_hudson(struct ehci_hcd *ehci)
48 {
49         struct pci_dev *amd_smbus_dev;
50         u8 rev = 0;
51
52         amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 0x4385, NULL);
53         if (amd_smbus_dev) {
54                 pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
55                 if (rev < 0x40) {
56                         pci_dev_put(amd_smbus_dev);
57                         amd_smbus_dev = NULL;
58                         return 0;
59                 }
60         } else {
61                 amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x780b, NULL);
62                 if (!amd_smbus_dev)
63                         return 0;
64                 pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
65                 if (rev < 0x11 || rev > 0x18) {
66                         pci_dev_put(amd_smbus_dev);
67                         amd_smbus_dev = NULL;
68                         return 0;
69                 }
70         }
71
72         if (!amd_nb_dev)
73                 amd_nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL);
74
75         ehci_info(ehci, "QUIRK: Enable exception for AMD Hudson ASPM\n");
76
77         pci_dev_put(amd_smbus_dev);
78         amd_smbus_dev = NULL;
79
80         return 1;
81 }
82
83 /* called during probe() after chip reset completes */
84 static int ehci_pci_setup(struct usb_hcd *hcd)
85 {
86         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
87         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
88         struct pci_dev          *p_smbus;
89         u8                      rev;
90         u32                     temp;
91         int                     retval;
92
93         switch (pdev->vendor) {
94         case PCI_VENDOR_ID_TOSHIBA_2:
95                 /* celleb's companion chip */
96                 if (pdev->device == 0x01b5) {
97 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
98                         ehci->big_endian_mmio = 1;
99 #else
100                         ehci_warn(ehci,
101                                   "unsupported big endian Toshiba quirk\n");
102 #endif
103                 }
104                 break;
105         }
106
107         ehci->caps = hcd->regs;
108         ehci->regs = hcd->regs +
109                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
110
111         dbg_hcs_params(ehci, "reset");
112         dbg_hcc_params(ehci, "reset");
113
114         /* ehci_init() causes memory for DMA transfers to be
115          * allocated.  Thus, any vendor-specific workarounds based on
116          * limiting the type of memory used for DMA transfers must
117          * happen before ehci_init() is called. */
118         switch (pdev->vendor) {
119         case PCI_VENDOR_ID_NVIDIA:
120                 /* NVidia reports that certain chips don't handle
121                  * QH, ITD, or SITD addresses above 2GB.  (But TD,
122                  * data buffer, and periodic schedule are normal.)
123                  */
124                 switch (pdev->device) {
125                 case 0x003c:    /* MCP04 */
126                 case 0x005b:    /* CK804 */
127                 case 0x00d8:    /* CK8 */
128                 case 0x00e8:    /* CK8S */
129                         if (pci_set_consistent_dma_mask(pdev,
130                                                 DMA_BIT_MASK(31)) < 0)
131                                 ehci_warn(ehci, "can't enable NVidia "
132                                         "workaround for >2GB RAM\n");
133                         break;
134                 }
135                 break;
136         }
137
138         /* cache this readonly data; minimize chip reads */
139         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
140
141         if (ehci_quirk_amd_hudson(ehci))
142                 ehci->amd_l1_fix = 1;
143
144         retval = ehci_halt(ehci);
145         if (retval)
146                 return retval;
147
148         if ((pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x7808) ||
149             (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x4396)) {
150                 /* EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
151                  * read/write memory space which does not belong to it when
152                  * there is NULL pointer with T-bit set to 1 in the frame list
153                  * table. To avoid the issue, the frame list link pointer
154                  * should always contain a valid pointer to a inactive qh.
155                  */
156                 ehci->use_dummy_qh = 1;
157                 ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI "
158                                 "dummy qh workaround\n");
159         }
160
161         /* data structure init */
162         retval = ehci_init(hcd);
163         if (retval)
164                 return retval;
165
166         switch (pdev->vendor) {
167         case PCI_VENDOR_ID_NEC:
168                 ehci->need_io_watchdog = 0;
169                 break;
170         case PCI_VENDOR_ID_INTEL:
171                 ehci->need_io_watchdog = 0;
172                 ehci->fs_i_thresh = 1;
173                 if (pdev->device == 0x27cc) {
174                         ehci->broken_periodic = 1;
175                         ehci_info(ehci, "using broken periodic workaround\n");
176                 }
177                 if (pdev->device == 0x0806 || pdev->device == 0x0811
178                                 || pdev->device == 0x0829) {
179                         ehci_info(ehci, "disable lpm for langwell/penwell\n");
180                         ehci->has_lpm = 0;
181                 }
182                 if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB) {
183                         hcd->has_tt = 1;
184                         tdi_reset(ehci);
185                 }
186                 break;
187         case PCI_VENDOR_ID_TDI:
188                 if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {
189                         hcd->has_tt = 1;
190                         tdi_reset(ehci);
191                 }
192                 break;
193         case PCI_VENDOR_ID_AMD:
194                 /* AMD8111 EHCI doesn't work, according to AMD errata */
195                 if (pdev->device == 0x7463) {
196                         ehci_info(ehci, "ignoring AMD8111 (errata)\n");
197                         retval = -EIO;
198                         goto done;
199                 }
200                 break;
201         case PCI_VENDOR_ID_NVIDIA:
202                 switch (pdev->device) {
203                 /* Some NForce2 chips have problems with selective suspend;
204                  * fixed in newer silicon.
205                  */
206                 case 0x0068:
207                         if (pdev->revision < 0xa4)
208                                 ehci->no_selective_suspend = 1;
209                         break;
210
211                 /* MCP89 chips on the MacBookAir3,1 give EPROTO when
212                  * fetching device descriptors unless LPM is disabled.
213                  * There are also intermittent problems enumerating
214                  * devices with PPCD enabled.
215                  */
216                 case 0x0d9d:
217                         ehci_info(ehci, "disable lpm/ppcd for nvidia mcp89");
218                         ehci->has_lpm = 0;
219                         ehci->has_ppcd = 0;
220                         ehci->command &= ~CMD_PPCEE;
221                         break;
222                 }
223                 break;
224         case PCI_VENDOR_ID_VIA:
225                 if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) {
226                         u8 tmp;
227
228                         /* The VT6212 defaults to a 1 usec EHCI sleep time which
229                          * hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes
230                          * that sleep time use the conventional 10 usec.
231                          */
232                         pci_read_config_byte(pdev, 0x4b, &tmp);
233                         if (tmp & 0x20)
234                                 break;
235                         pci_write_config_byte(pdev, 0x4b, tmp | 0x20);
236                 }
237                 break;
238         case PCI_VENDOR_ID_ATI:
239                 /* SB600 and old version of SB700 have a bug in EHCI controller,
240                  * which causes usb devices lose response in some cases.
241                  */
242                 if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) {
243                         p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
244                                                  PCI_DEVICE_ID_ATI_SBX00_SMBUS,
245                                                  NULL);
246                         if (!p_smbus)
247                                 break;
248                         rev = p_smbus->revision;
249                         if ((pdev->device == 0x4386) || (rev == 0x3a)
250                             || (rev == 0x3b)) {
251                                 u8 tmp;
252                                 ehci_info(ehci, "applying AMD SB600/SB700 USB "
253                                         "freeze workaround\n");
254                                 pci_read_config_byte(pdev, 0x53, &tmp);
255                                 pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
256                         }
257                         pci_dev_put(p_smbus);
258                 }
259                 break;
260         }
261
262         /* optional debug port, normally in the first BAR */
263         temp = pci_find_capability(pdev, 0x0a);
264         if (temp) {
265                 pci_read_config_dword(pdev, temp, &temp);
266                 temp >>= 16;
267                 if ((temp & (3 << 13)) == (1 << 13)) {
268                         temp &= 0x1fff;
269                         ehci->debug = ehci_to_hcd(ehci)->regs + temp;
270                         temp = ehci_readl(ehci, &ehci->debug->control);
271                         ehci_info(ehci, "debug port %d%s\n",
272                                 HCS_DEBUG_PORT(ehci->hcs_params),
273                                 (temp & DBGP_ENABLED)
274                                         ? " IN USE"
275                                         : "");
276                         if (!(temp & DBGP_ENABLED))
277                                 ehci->debug = NULL;
278                 }
279         }
280
281         ehci_reset(ehci);
282
283         /* at least the Genesys GL880S needs fixup here */
284         temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
285         temp &= 0x0f;
286         if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
287                 ehci_dbg(ehci, "bogus port configuration: "
288                         "cc=%d x pcc=%d < ports=%d\n",
289                         HCS_N_CC(ehci->hcs_params),
290                         HCS_N_PCC(ehci->hcs_params),
291                         HCS_N_PORTS(ehci->hcs_params));
292
293                 switch (pdev->vendor) {
294                 case 0x17a0:            /* GENESYS */
295                         /* GL880S: should be PORTS=2 */
296                         temp |= (ehci->hcs_params & ~0xf);
297                         ehci->hcs_params = temp;
298                         break;
299                 case PCI_VENDOR_ID_NVIDIA:
300                         /* NF4: should be PCC=10 */
301                         break;
302                 }
303         }
304
305         /* Serial Bus Release Number is at PCI 0x60 offset */
306         pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
307
308         /* Keep this around for a while just in case some EHCI
309          * implementation uses legacy PCI PM support.  This test
310          * can be removed on 17 Dec 2009 if the dev_warn() hasn't
311          * been triggered by then.
312          */
313         if (!device_can_wakeup(&pdev->dev)) {
314                 u16     port_wake;
315
316                 pci_read_config_word(pdev, 0x62, &port_wake);
317                 if (port_wake & 0x0001) {
318                         dev_warn(&pdev->dev, "Enabling legacy PCI PM\n");
319                         device_set_wakeup_capable(&pdev->dev, 1);
320                 }
321         }
322
323 #ifdef  CONFIG_USB_SUSPEND
324         /* REVISIT: the controller works fine for wakeup iff the root hub
325          * itself is "globally" suspended, but usbcore currently doesn't
326          * understand such things.
327          *
328          * System suspend currently expects to be able to suspend the entire
329          * device tree, device-at-a-time.  If we failed selective suspend
330          * reports, system suspend would fail; so the root hub code must claim
331          * success.  That's lying to usbcore, and it matters for runtime
332          * PM scenarios with selective suspend and remote wakeup...
333          */
334         if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
335                 ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
336 #endif
337
338         ehci_port_power(ehci, 1);
339         retval = ehci_pci_reinit(ehci, pdev);
340 done:
341         return retval;
342 }
343
344 /*-------------------------------------------------------------------------*/
345
346 #ifdef  CONFIG_PM
347
348 /* suspend/resume, section 4.3 */
349
350 /* These routines rely on the PCI bus glue
351  * to handle powerdown and wakeup, and currently also on
352  * transceivers that don't need any software attention to set up
353  * the right sort of wakeup.
354  * Also they depend on separate root hub suspend/resume.
355  */
356
357 static int ehci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
358 {
359         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
360         unsigned long           flags;
361         int                     rc = 0;
362
363         if (time_before(jiffies, ehci->next_statechange))
364                 msleep(10);
365
366         /* Root hub was already suspended. Disable irq emission and
367          * mark HW unaccessible.  The PM and USB cores make sure that
368          * the root hub is either suspended or stopped.
369          */
370         ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
371         spin_lock_irqsave (&ehci->lock, flags);
372         ehci_writel(ehci, 0, &ehci->regs->intr_enable);
373         (void)ehci_readl(ehci, &ehci->regs->intr_enable);
374
375         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
376         spin_unlock_irqrestore (&ehci->lock, flags);
377
378         // could save FLADJ in case of Vaux power loss
379         // ... we'd only use it to handle clock skew
380
381         return rc;
382 }
383
384 static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
385 {
386         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
387         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
388
389         // maybe restore FLADJ
390
391         if (time_before(jiffies, ehci->next_statechange))
392                 msleep(100);
393
394         /* Mark hardware accessible again as we are out of D3 state by now */
395         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
396
397         /* If CF is still set and we aren't resuming from hibernation
398          * then we maintained PCI Vaux power.
399          * Just undo the effect of ehci_pci_suspend().
400          */
401         if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
402                                 !hibernated) {
403                 int     mask = INTR_MASK;
404
405                 ehci_prepare_ports_for_controller_resume(ehci);
406                 if (!hcd->self.root_hub->do_remote_wakeup)
407                         mask &= ~STS_PCD;
408                 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
409                 ehci_readl(ehci, &ehci->regs->intr_enable);
410                 return 0;
411         }
412
413         usb_root_hub_lost_power(hcd->self.root_hub);
414
415         /* Else reset, to cope with power loss or flush-to-storage
416          * style "resume" having let BIOS kick in during reboot.
417          */
418         (void) ehci_halt(ehci);
419         (void) ehci_reset(ehci);
420         (void) ehci_pci_reinit(ehci, pdev);
421
422         /* emptying the schedule aborts any urbs */
423         spin_lock_irq(&ehci->lock);
424         if (ehci->reclaim)
425                 end_unlink_async(ehci);
426         ehci_work(ehci);
427         spin_unlock_irq(&ehci->lock);
428
429         ehci_writel(ehci, ehci->command, &ehci->regs->command);
430         ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
431         ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
432
433         /* here we "know" root ports should always stay powered */
434         ehci_port_power(ehci, 1);
435
436         hcd->state = HC_STATE_SUSPENDED;
437         return 0;
438 }
439 #endif
440
441 static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
442 {
443         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
444         int rc = 0;
445
446         if (!udev->parent) /* udev is root hub itself, impossible */
447                 rc = -1;
448         /* we only support lpm device connected to root hub yet */
449         if (ehci->has_lpm && !udev->parent->parent) {
450                 rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
451                 if (!rc)
452                         rc = ehci_lpm_check(ehci, udev->portnum);
453         }
454         return rc;
455 }
456
457 static const struct hc_driver ehci_pci_hc_driver = {
458         .description =          hcd_name,
459         .product_desc =         "EHCI Host Controller",
460         .hcd_priv_size =        sizeof(struct ehci_hcd),
461
462         /*
463          * generic hardware linkage
464          */
465         .irq =                  ehci_irq,
466         .flags =                HCD_MEMORY | HCD_USB2,
467
468         /*
469          * basic lifecycle operations
470          */
471         .reset =                ehci_pci_setup,
472         .start =                ehci_run,
473 #ifdef  CONFIG_PM
474         .pci_suspend =          ehci_pci_suspend,
475         .pci_resume =           ehci_pci_resume,
476 #endif
477         .stop =                 ehci_stop,
478         .shutdown =             ehci_shutdown,
479
480         /*
481          * managing i/o requests and associated device resources
482          */
483         .urb_enqueue =          ehci_urb_enqueue,
484         .urb_dequeue =          ehci_urb_dequeue,
485         .endpoint_disable =     ehci_endpoint_disable,
486         .endpoint_reset =       ehci_endpoint_reset,
487
488         /*
489          * scheduling support
490          */
491         .get_frame_number =     ehci_get_frame,
492
493         /*
494          * root hub support
495          */
496         .hub_status_data =      ehci_hub_status_data,
497         .hub_control =          ehci_hub_control,
498         .bus_suspend =          ehci_bus_suspend,
499         .bus_resume =           ehci_bus_resume,
500         .relinquish_port =      ehci_relinquish_port,
501         .port_handed_over =     ehci_port_handed_over,
502
503         /*
504          * call back when device connected and addressed
505          */
506         .update_device =        ehci_update_device,
507
508         .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
509 };
510
511 /*-------------------------------------------------------------------------*/
512
513 /* PCI driver selection metadata; PCI hotplugging uses this */
514 static const struct pci_device_id pci_ids [] = { {
515         /* handle any USB 2.0 EHCI controller */
516         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
517         .driver_data =  (unsigned long) &ehci_pci_hc_driver,
518         },
519         { /* end: all zeroes */ }
520 };
521 MODULE_DEVICE_TABLE(pci, pci_ids);
522
523 /* pci driver glue; this is a "new style" PCI driver module */
524 static struct pci_driver ehci_pci_driver = {
525         .name =         (char *) hcd_name,
526         .id_table =     pci_ids,
527
528         .probe =        usb_hcd_pci_probe,
529         .remove =       usb_hcd_pci_remove,
530         .shutdown =     usb_hcd_pci_shutdown,
531
532 #ifdef CONFIG_PM_SLEEP
533         .driver =       {
534                 .pm =   &usb_hcd_pci_pm_ops
535         },
536 #endif
537 };