]> git.karo-electronics.de Git - mv-sheeva.git/blob - drivers/usb/host/ehci-pci.c
Merge branch 'usb-next' into musb-merge
[mv-sheeva.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_SB800(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                 return 0;
55
56         pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
57         if (rev < 0x40) {
58                 pci_dev_put(amd_smbus_dev);
59                 amd_smbus_dev = NULL;
60                 return 0;
61         }
62
63         if (!amd_nb_dev)
64                 amd_nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL);
65         if (!amd_nb_dev)
66                 ehci_err(ehci, "QUIRK: unable to get AMD NB device\n");
67
68         ehci_info(ehci, "QUIRK: Enable AMD SB800 L1 fix\n");
69
70         pci_dev_put(amd_smbus_dev);
71         amd_smbus_dev = NULL;
72
73         return 1;
74 }
75
76 /* called during probe() after chip reset completes */
77 static int ehci_pci_setup(struct usb_hcd *hcd)
78 {
79         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
80         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
81         struct pci_dev          *p_smbus;
82         u8                      rev;
83         u32                     temp;
84         int                     retval;
85
86         switch (pdev->vendor) {
87         case PCI_VENDOR_ID_TOSHIBA_2:
88                 /* celleb's companion chip */
89                 if (pdev->device == 0x01b5) {
90 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
91                         ehci->big_endian_mmio = 1;
92 #else
93                         ehci_warn(ehci,
94                                   "unsupported big endian Toshiba quirk\n");
95 #endif
96                 }
97                 break;
98         }
99
100         ehci->caps = hcd->regs;
101         ehci->regs = hcd->regs +
102                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
103
104         dbg_hcs_params(ehci, "reset");
105         dbg_hcc_params(ehci, "reset");
106
107         /* ehci_init() causes memory for DMA transfers to be
108          * allocated.  Thus, any vendor-specific workarounds based on
109          * limiting the type of memory used for DMA transfers must
110          * happen before ehci_init() is called. */
111         switch (pdev->vendor) {
112         case PCI_VENDOR_ID_NVIDIA:
113                 /* NVidia reports that certain chips don't handle
114                  * QH, ITD, or SITD addresses above 2GB.  (But TD,
115                  * data buffer, and periodic schedule are normal.)
116                  */
117                 switch (pdev->device) {
118                 case 0x003c:    /* MCP04 */
119                 case 0x005b:    /* CK804 */
120                 case 0x00d8:    /* CK8 */
121                 case 0x00e8:    /* CK8S */
122                         if (pci_set_consistent_dma_mask(pdev,
123                                                 DMA_BIT_MASK(31)) < 0)
124                                 ehci_warn(ehci, "can't enable NVidia "
125                                         "workaround for >2GB RAM\n");
126                         break;
127                 }
128                 break;
129         }
130
131         /* cache this readonly data; minimize chip reads */
132         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
133
134         if (ehci_quirk_amd_SB800(ehci))
135                 ehci->amd_l1_fix = 1;
136
137         retval = ehci_halt(ehci);
138         if (retval)
139                 return retval;
140
141         if ((pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x7808) ||
142             (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x4396)) {
143                 /* EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
144                  * read/write memory space which does not belong to it when
145                  * there is NULL pointer with T-bit set to 1 in the frame list
146                  * table. To avoid the issue, the frame list link pointer
147                  * should always contain a valid pointer to a inactive qh.
148                  */
149                 ehci->use_dummy_qh = 1;
150                 ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI "
151                                 "dummy qh workaround\n");
152         }
153
154         /* data structure init */
155         retval = ehci_init(hcd);
156         if (retval)
157                 return retval;
158
159         switch (pdev->vendor) {
160         case PCI_VENDOR_ID_NEC:
161                 ehci->need_io_watchdog = 0;
162                 break;
163         case PCI_VENDOR_ID_INTEL:
164                 ehci->need_io_watchdog = 0;
165                 ehci->fs_i_thresh = 1;
166                 if (pdev->device == 0x27cc) {
167                         ehci->broken_periodic = 1;
168                         ehci_info(ehci, "using broken periodic workaround\n");
169                 }
170                 if (pdev->device == 0x0806 || pdev->device == 0x0811
171                                 || pdev->device == 0x0829) {
172                         ehci_info(ehci, "disable lpm for langwell/penwell\n");
173                         ehci->has_lpm = 0;
174                 }
175                 if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB) {
176                         hcd->has_tt = 1;
177                         tdi_reset(ehci);
178                 }
179                 break;
180         case PCI_VENDOR_ID_TDI:
181                 if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {
182                         hcd->has_tt = 1;
183                         tdi_reset(ehci);
184                 }
185                 break;
186         case PCI_VENDOR_ID_AMD:
187                 /* AMD8111 EHCI doesn't work, according to AMD errata */
188                 if (pdev->device == 0x7463) {
189                         ehci_info(ehci, "ignoring AMD8111 (errata)\n");
190                         retval = -EIO;
191                         goto done;
192                 }
193                 break;
194         case PCI_VENDOR_ID_NVIDIA:
195                 switch (pdev->device) {
196                 /* Some NForce2 chips have problems with selective suspend;
197                  * fixed in newer silicon.
198                  */
199                 case 0x0068:
200                         if (pdev->revision < 0xa4)
201                                 ehci->no_selective_suspend = 1;
202                         break;
203
204                 /* MCP89 chips on the MacBookAir3,1 give EPROTO when
205                  * fetching device descriptors unless LPM is disabled.
206                  * There are also intermittent problems enumerating
207                  * devices with PPCD enabled.
208                  */
209                 case 0x0d9d:
210                         ehci_info(ehci, "disable lpm/ppcd for nvidia mcp89");
211                         ehci->has_lpm = 0;
212                         ehci->has_ppcd = 0;
213                         ehci->command &= ~CMD_PPCEE;
214                         break;
215                 }
216                 break;
217         case PCI_VENDOR_ID_VIA:
218                 if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) {
219                         u8 tmp;
220
221                         /* The VT6212 defaults to a 1 usec EHCI sleep time which
222                          * hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes
223                          * that sleep time use the conventional 10 usec.
224                          */
225                         pci_read_config_byte(pdev, 0x4b, &tmp);
226                         if (tmp & 0x20)
227                                 break;
228                         pci_write_config_byte(pdev, 0x4b, tmp | 0x20);
229                 }
230                 break;
231         case PCI_VENDOR_ID_ATI:
232                 /* SB600 and old version of SB700 have a bug in EHCI controller,
233                  * which causes usb devices lose response in some cases.
234                  */
235                 if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) {
236                         p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
237                                                  PCI_DEVICE_ID_ATI_SBX00_SMBUS,
238                                                  NULL);
239                         if (!p_smbus)
240                                 break;
241                         rev = p_smbus->revision;
242                         if ((pdev->device == 0x4386) || (rev == 0x3a)
243                             || (rev == 0x3b)) {
244                                 u8 tmp;
245                                 ehci_info(ehci, "applying AMD SB600/SB700 USB "
246                                         "freeze workaround\n");
247                                 pci_read_config_byte(pdev, 0x53, &tmp);
248                                 pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
249                         }
250                         pci_dev_put(p_smbus);
251                 }
252                 break;
253         }
254
255         /* optional debug port, normally in the first BAR */
256         temp = pci_find_capability(pdev, 0x0a);
257         if (temp) {
258                 pci_read_config_dword(pdev, temp, &temp);
259                 temp >>= 16;
260                 if ((temp & (3 << 13)) == (1 << 13)) {
261                         temp &= 0x1fff;
262                         ehci->debug = ehci_to_hcd(ehci)->regs + temp;
263                         temp = ehci_readl(ehci, &ehci->debug->control);
264                         ehci_info(ehci, "debug port %d%s\n",
265                                 HCS_DEBUG_PORT(ehci->hcs_params),
266                                 (temp & DBGP_ENABLED)
267                                         ? " IN USE"
268                                         : "");
269                         if (!(temp & DBGP_ENABLED))
270                                 ehci->debug = NULL;
271                 }
272         }
273
274         ehci_reset(ehci);
275
276         /* at least the Genesys GL880S needs fixup here */
277         temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
278         temp &= 0x0f;
279         if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
280                 ehci_dbg(ehci, "bogus port configuration: "
281                         "cc=%d x pcc=%d < ports=%d\n",
282                         HCS_N_CC(ehci->hcs_params),
283                         HCS_N_PCC(ehci->hcs_params),
284                         HCS_N_PORTS(ehci->hcs_params));
285
286                 switch (pdev->vendor) {
287                 case 0x17a0:            /* GENESYS */
288                         /* GL880S: should be PORTS=2 */
289                         temp |= (ehci->hcs_params & ~0xf);
290                         ehci->hcs_params = temp;
291                         break;
292                 case PCI_VENDOR_ID_NVIDIA:
293                         /* NF4: should be PCC=10 */
294                         break;
295                 }
296         }
297
298         /* Serial Bus Release Number is at PCI 0x60 offset */
299         pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
300
301         /* Keep this around for a while just in case some EHCI
302          * implementation uses legacy PCI PM support.  This test
303          * can be removed on 17 Dec 2009 if the dev_warn() hasn't
304          * been triggered by then.
305          */
306         if (!device_can_wakeup(&pdev->dev)) {
307                 u16     port_wake;
308
309                 pci_read_config_word(pdev, 0x62, &port_wake);
310                 if (port_wake & 0x0001) {
311                         dev_warn(&pdev->dev, "Enabling legacy PCI PM\n");
312                         device_set_wakeup_capable(&pdev->dev, 1);
313                 }
314         }
315
316 #ifdef  CONFIG_USB_SUSPEND
317         /* REVISIT: the controller works fine for wakeup iff the root hub
318          * itself is "globally" suspended, but usbcore currently doesn't
319          * understand such things.
320          *
321          * System suspend currently expects to be able to suspend the entire
322          * device tree, device-at-a-time.  If we failed selective suspend
323          * reports, system suspend would fail; so the root hub code must claim
324          * success.  That's lying to usbcore, and it matters for runtime
325          * PM scenarios with selective suspend and remote wakeup...
326          */
327         if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
328                 ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
329 #endif
330
331         ehci_port_power(ehci, 1);
332         retval = ehci_pci_reinit(ehci, pdev);
333 done:
334         return retval;
335 }
336
337 /*-------------------------------------------------------------------------*/
338
339 #ifdef  CONFIG_PM
340
341 /* suspend/resume, section 4.3 */
342
343 /* These routines rely on the PCI bus glue
344  * to handle powerdown and wakeup, and currently also on
345  * transceivers that don't need any software attention to set up
346  * the right sort of wakeup.
347  * Also they depend on separate root hub suspend/resume.
348  */
349
350 static int ehci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
351 {
352         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
353         unsigned long           flags;
354         int                     rc = 0;
355
356         if (time_before(jiffies, ehci->next_statechange))
357                 msleep(10);
358
359         /* Root hub was already suspended. Disable irq emission and
360          * mark HW unaccessible.  The PM and USB cores make sure that
361          * the root hub is either suspended or stopped.
362          */
363         spin_lock_irqsave (&ehci->lock, flags);
364         ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
365         ehci_writel(ehci, 0, &ehci->regs->intr_enable);
366         (void)ehci_readl(ehci, &ehci->regs->intr_enable);
367
368         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
369         spin_unlock_irqrestore (&ehci->lock, flags);
370
371         // could save FLADJ in case of Vaux power loss
372         // ... we'd only use it to handle clock skew
373
374         return rc;
375 }
376
377 static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
378 {
379         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
380         struct pci_dev          *pdev = to_pci_dev(hcd->self.controller);
381
382         // maybe restore FLADJ
383
384         if (time_before(jiffies, ehci->next_statechange))
385                 msleep(100);
386
387         /* Mark hardware accessible again as we are out of D3 state by now */
388         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
389
390         /* If CF is still set and we aren't resuming from hibernation
391          * then we maintained PCI Vaux power.
392          * Just undo the effect of ehci_pci_suspend().
393          */
394         if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
395                                 !hibernated) {
396                 int     mask = INTR_MASK;
397
398                 ehci_prepare_ports_for_controller_resume(ehci);
399                 if (!hcd->self.root_hub->do_remote_wakeup)
400                         mask &= ~STS_PCD;
401                 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
402                 ehci_readl(ehci, &ehci->regs->intr_enable);
403                 return 0;
404         }
405
406         usb_root_hub_lost_power(hcd->self.root_hub);
407
408         /* Else reset, to cope with power loss or flush-to-storage
409          * style "resume" having let BIOS kick in during reboot.
410          */
411         (void) ehci_halt(ehci);
412         (void) ehci_reset(ehci);
413         (void) ehci_pci_reinit(ehci, pdev);
414
415         /* emptying the schedule aborts any urbs */
416         spin_lock_irq(&ehci->lock);
417         if (ehci->reclaim)
418                 end_unlink_async(ehci);
419         ehci_work(ehci);
420         spin_unlock_irq(&ehci->lock);
421
422         ehci_writel(ehci, ehci->command, &ehci->regs->command);
423         ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
424         ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
425
426         /* here we "know" root ports should always stay powered */
427         ehci_port_power(ehci, 1);
428
429         hcd->state = HC_STATE_SUSPENDED;
430         return 0;
431 }
432 #endif
433
434 static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
435 {
436         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
437         int rc = 0;
438
439         if (!udev->parent) /* udev is root hub itself, impossible */
440                 rc = -1;
441         /* we only support lpm device connected to root hub yet */
442         if (ehci->has_lpm && !udev->parent->parent) {
443                 rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
444                 if (!rc)
445                         rc = ehci_lpm_check(ehci, udev->portnum);
446         }
447         return rc;
448 }
449
450 static const struct hc_driver ehci_pci_hc_driver = {
451         .description =          hcd_name,
452         .product_desc =         "EHCI Host Controller",
453         .hcd_priv_size =        sizeof(struct ehci_hcd),
454
455         /*
456          * generic hardware linkage
457          */
458         .irq =                  ehci_irq,
459         .flags =                HCD_MEMORY | HCD_USB2,
460
461         /*
462          * basic lifecycle operations
463          */
464         .reset =                ehci_pci_setup,
465         .start =                ehci_run,
466 #ifdef  CONFIG_PM
467         .pci_suspend =          ehci_pci_suspend,
468         .pci_resume =           ehci_pci_resume,
469 #endif
470         .stop =                 ehci_stop,
471         .shutdown =             ehci_shutdown,
472
473         /*
474          * managing i/o requests and associated device resources
475          */
476         .urb_enqueue =          ehci_urb_enqueue,
477         .urb_dequeue =          ehci_urb_dequeue,
478         .endpoint_disable =     ehci_endpoint_disable,
479         .endpoint_reset =       ehci_endpoint_reset,
480
481         /*
482          * scheduling support
483          */
484         .get_frame_number =     ehci_get_frame,
485
486         /*
487          * root hub support
488          */
489         .hub_status_data =      ehci_hub_status_data,
490         .hub_control =          ehci_hub_control,
491         .bus_suspend =          ehci_bus_suspend,
492         .bus_resume =           ehci_bus_resume,
493         .relinquish_port =      ehci_relinquish_port,
494         .port_handed_over =     ehci_port_handed_over,
495
496         /*
497          * call back when device connected and addressed
498          */
499         .update_device =        ehci_update_device,
500
501         .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
502 };
503
504 /*-------------------------------------------------------------------------*/
505
506 /* PCI driver selection metadata; PCI hotplugging uses this */
507 static const struct pci_device_id pci_ids [] = { {
508         /* handle any USB 2.0 EHCI controller */
509         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
510         .driver_data =  (unsigned long) &ehci_pci_hc_driver,
511         },
512         { /* end: all zeroes */ }
513 };
514 MODULE_DEVICE_TABLE(pci, pci_ids);
515
516 /* pci driver glue; this is a "new style" PCI driver module */
517 static struct pci_driver ehci_pci_driver = {
518         .name =         (char *) hcd_name,
519         .id_table =     pci_ids,
520
521         .probe =        usb_hcd_pci_probe,
522         .remove =       usb_hcd_pci_remove,
523         .shutdown =     usb_hcd_pci_shutdown,
524
525 #ifdef CONFIG_PM_SLEEP
526         .driver =       {
527                 .pm =   &usb_hcd_pci_pm_ops
528         },
529 #endif
530 };