Merge branch 'ec-cleanup' into release
[pandora-kernel.git] / drivers / usb / host / ohci-pci.c
1 /*
2  * OHCI HCD (Host Controller Driver) for USB.
3  *
4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5  * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6  *
7  * [ Initialisation is based on Linus'  ]
8  * [ uhci code and gregs ohci fragments ]
9  * [ (C) Copyright 1999 Linus Torvalds  ]
10  * [ (C) Copyright 1999 Gregory P. Smith]
11  *
12  * PCI Bus Glue
13  *
14  * This file is licenced under the GPL.
15  */
16
17 #ifndef CONFIG_PCI
18 #error "This file is PCI bus glue.  CONFIG_PCI must be defined."
19 #endif
20
21 #include <linux/pci.h>
22 #include <linux/io.h>
23
24
25 /*-------------------------------------------------------------------------*/
26
27 static int broken_suspend(struct usb_hcd *hcd)
28 {
29         device_init_wakeup(&hcd->self.root_hub->dev, 0);
30         return 0;
31 }
32
33 /* AMD 756, for most chips (early revs), corrupts register
34  * values on read ... so enable the vendor workaround.
35  */
36 static int ohci_quirk_amd756(struct usb_hcd *hcd)
37 {
38         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
39
40         ohci->flags = OHCI_QUIRK_AMD756;
41         ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
42
43         /* also erratum 10 (suspend/resume issues) */
44         return broken_suspend(hcd);
45 }
46
47 /* Apple's OHCI driver has a lot of bizarre workarounds
48  * for this chip.  Evidently control and bulk lists
49  * can get confused.  (B&W G3 models, and ...)
50  */
51 static int ohci_quirk_opti(struct usb_hcd *hcd)
52 {
53         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
54
55         ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n");
56
57         return 0;
58 }
59
60 /* Check for NSC87560. We have to look at the bridge (fn1) to
61  * identify the USB (fn2). This quirk might apply to more or
62  * even all NSC stuff.
63  */
64 static int ohci_quirk_ns(struct usb_hcd *hcd)
65 {
66         struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
67         struct pci_dev  *b;
68
69         b  = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
70         if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
71             && b->vendor == PCI_VENDOR_ID_NS) {
72                 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
73
74                 ohci->flags |= OHCI_QUIRK_SUPERIO;
75                 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
76         }
77         pci_dev_put(b);
78
79         return 0;
80 }
81
82 /* Check for Compaq's ZFMicro chipset, which needs short
83  * delays before control or bulk queues get re-activated
84  * in finish_unlinks()
85  */
86 static int ohci_quirk_zfmicro(struct usb_hcd *hcd)
87 {
88         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
89
90         ohci->flags |= OHCI_QUIRK_ZFMICRO;
91         ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n");
92
93         return 0;
94 }
95
96 /* Check for Toshiba SCC OHCI which has big endian registers
97  * and little endian in memory data structures
98  */
99 static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd)
100 {
101         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
102
103         /* That chip is only present in the southbridge of some
104          * cell based platforms which are supposed to select
105          * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if
106          * that was the case though.
107          */
108 #ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
109         ohci->flags |= OHCI_QUIRK_BE_MMIO;
110         ohci_dbg (ohci, "enabled big endian Toshiba quirk\n");
111         return 0;
112 #else
113         ohci_err (ohci, "unsupported big endian Toshiba quirk\n");
114         return -ENXIO;
115 #endif
116 }
117
118 /* Check for NEC chip and apply quirk for allegedly lost interrupts.
119  */
120
121 static void ohci_quirk_nec_worker(struct work_struct *work)
122 {
123         struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
124         int status;
125
126         status = ohci_init(ohci);
127         if (status != 0) {
128                 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
129                          "ohci_init", status);
130                 return;
131         }
132
133         status = ohci_restart(ohci);
134         if (status != 0)
135                 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
136                          "ohci_restart", status);
137 }
138
139 static int ohci_quirk_nec(struct usb_hcd *hcd)
140 {
141         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
142
143         ohci->flags |= OHCI_QUIRK_NEC;
144         INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker);
145         ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n");
146
147         return 0;
148 }
149
150 static int ohci_quirk_amd700(struct usb_hcd *hcd)
151 {
152         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
153         struct pci_dev *amd_smbus_dev;
154         u8 rev;
155
156         if (usb_amd_find_chipset_info())
157                 ohci->flags |= OHCI_QUIRK_AMD_PLL;
158
159         amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
160                         PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
161         if (!amd_smbus_dev)
162                 return 0;
163
164         rev = amd_smbus_dev->revision;
165
166         /* SB800 needs pre-fetch fix */
167         if ((rev >= 0x40) && (rev <= 0x4f)) {
168                 ohci->flags |= OHCI_QUIRK_AMD_PREFETCH;
169                 ohci_dbg(ohci, "enabled AMD prefetch quirk\n");
170         }
171
172         pci_dev_put(amd_smbus_dev);
173         amd_smbus_dev = NULL;
174
175         return 0;
176 }
177
178 /* nVidia controllers continue to drive Reset signalling on the bus
179  * even after system shutdown, wasting power.  This flag tells the
180  * shutdown routine to leave the controller OPERATIONAL instead of RESET.
181  */
182 static int ohci_quirk_nvidia_shutdown(struct usb_hcd *hcd)
183 {
184         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
185
186         ohci->flags |= OHCI_QUIRK_SHUTDOWN;
187         ohci_dbg(ohci, "enabled nVidia shutdown quirk\n");
188
189         return 0;
190 }
191
192 static void sb800_prefetch(struct ohci_hcd *ohci, int on)
193 {
194         struct pci_dev *pdev;
195         u16 misc;
196
197         pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
198         pci_read_config_word(pdev, 0x50, &misc);
199         if (on == 0)
200                 pci_write_config_word(pdev, 0x50, misc & 0xfcff);
201         else
202                 pci_write_config_word(pdev, 0x50, misc | 0x0300);
203 }
204
205 /* List of quirks for OHCI */
206 static const struct pci_device_id ohci_pci_quirks[] = {
207         {
208                 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
209                 .driver_data = (unsigned long)ohci_quirk_amd756,
210         },
211         {
212                 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
213                 .driver_data = (unsigned long)ohci_quirk_opti,
214         },
215         {
216                 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
217                 .driver_data = (unsigned long)ohci_quirk_ns,
218         },
219         {
220                 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
221                 .driver_data = (unsigned long)ohci_quirk_zfmicro,
222         },
223         {
224                 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
225                 .driver_data = (unsigned long)ohci_quirk_toshiba_scc,
226         },
227         {
228                 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
229                 .driver_data = (unsigned long)ohci_quirk_nec,
230         },
231         {
232                 /* Toshiba portege 4000 */
233                 .vendor         = PCI_VENDOR_ID_AL,
234                 .device         = 0x5237,
235                 .subvendor      = PCI_VENDOR_ID_TOSHIBA,
236                 .subdevice      = 0x0004,
237                 .driver_data    = (unsigned long) broken_suspend,
238         },
239         {
240                 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
241                 .driver_data = (unsigned long) broken_suspend,
242         },
243         {
244                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397),
245                 .driver_data = (unsigned long)ohci_quirk_amd700,
246         },
247         {
248                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398),
249                 .driver_data = (unsigned long)ohci_quirk_amd700,
250         },
251         {
252                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399),
253                 .driver_data = (unsigned long)ohci_quirk_amd700,
254         },
255         {
256                 PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID),
257                 .driver_data = (unsigned long) ohci_quirk_nvidia_shutdown,
258         },
259
260         /* FIXME for some of the early AMD 760 southbridges, OHCI
261          * won't work at all.  blacklist them.
262          */
263
264         {},
265 };
266
267 static int ohci_pci_reset (struct usb_hcd *hcd)
268 {
269         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
270         int ret = 0;
271
272         if (hcd->self.controller) {
273                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
274                 const struct pci_device_id *quirk_id;
275
276                 quirk_id = pci_match_id(ohci_pci_quirks, pdev);
277                 if (quirk_id != NULL) {
278                         int (*quirk)(struct usb_hcd *ohci);
279                         quirk = (void *)quirk_id->driver_data;
280                         ret = quirk(hcd);
281                 }
282         }
283         if (ret == 0) {
284                 ohci_hcd_init (ohci);
285                 return ohci_init (ohci);
286         }
287         return ret;
288 }
289
290
291 static int __devinit ohci_pci_start (struct usb_hcd *hcd)
292 {
293         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
294         int             ret;
295
296 #ifdef CONFIG_PM /* avoid warnings about unused pdev */
297         if (hcd->self.controller) {
298                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
299
300                 /* RWC may not be set for add-in PCI cards, since boot
301                  * firmware probably ignored them.  This transfers PCI
302                  * PM wakeup capabilities.
303                  */
304                 if (device_can_wakeup(&pdev->dev))
305                         ohci->hc_control |= OHCI_CTRL_RWC;
306         }
307 #endif /* CONFIG_PM */
308
309         ret = ohci_run (ohci);
310         if (ret < 0) {
311                 ohci_err (ohci, "can't start\n");
312                 ohci_stop (hcd);
313         }
314         return ret;
315 }
316
317 #ifdef  CONFIG_PM
318
319 static int ohci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
320 {
321         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
322         unsigned long   flags;
323         int             rc = 0;
324
325         /* Root hub was already suspended. Disable irq emission and
326          * mark HW unaccessible, bail out if RH has been resumed. Use
327          * the spinlock to properly synchronize with possible pending
328          * RH suspend or resume activity.
329          *
330          * This is still racy as hcd->state is manipulated outside of
331          * any locks =P But that will be a different fix.
332          */
333         spin_lock_irqsave (&ohci->lock, flags);
334         if (hcd->state != HC_STATE_SUSPENDED) {
335                 rc = -EINVAL;
336                 goto bail;
337         }
338         ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
339         (void)ohci_readl(ohci, &ohci->regs->intrdisable);
340
341         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
342  bail:
343         spin_unlock_irqrestore (&ohci->lock, flags);
344
345         return rc;
346 }
347
348
349 static int ohci_pci_resume(struct usb_hcd *hcd, bool hibernated)
350 {
351         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
352
353         /* Make sure resume from hibernation re-enumerates everything */
354         if (hibernated)
355                 ohci_usb_reset(hcd_to_ohci(hcd));
356
357         ohci_finish_controller_resume(hcd);
358         return 0;
359 }
360
361 #endif  /* CONFIG_PM */
362
363
364 /*-------------------------------------------------------------------------*/
365
366 static const struct hc_driver ohci_pci_hc_driver = {
367         .description =          hcd_name,
368         .product_desc =         "OHCI Host Controller",
369         .hcd_priv_size =        sizeof(struct ohci_hcd),
370
371         /*
372          * generic hardware linkage
373          */
374         .irq =                  ohci_irq,
375         .flags =                HCD_MEMORY | HCD_USB11,
376
377         /*
378          * basic lifecycle operations
379          */
380         .reset =                ohci_pci_reset,
381         .start =                ohci_pci_start,
382         .stop =                 ohci_stop,
383         .shutdown =             ohci_shutdown,
384
385 #ifdef  CONFIG_PM
386         .pci_suspend =          ohci_pci_suspend,
387         .pci_resume =           ohci_pci_resume,
388 #endif
389
390         /*
391          * managing i/o requests and associated device resources
392          */
393         .urb_enqueue =          ohci_urb_enqueue,
394         .urb_dequeue =          ohci_urb_dequeue,
395         .endpoint_disable =     ohci_endpoint_disable,
396
397         /*
398          * scheduling support
399          */
400         .get_frame_number =     ohci_get_frame,
401
402         /*
403          * root hub support
404          */
405         .hub_status_data =      ohci_hub_status_data,
406         .hub_control =          ohci_hub_control,
407 #ifdef  CONFIG_PM
408         .bus_suspend =          ohci_bus_suspend,
409         .bus_resume =           ohci_bus_resume,
410 #endif
411         .start_port_reset =     ohci_start_port_reset,
412 };
413
414 /*-------------------------------------------------------------------------*/
415
416
417 static const struct pci_device_id pci_ids [] = { {
418         /* handle any USB OHCI controller */
419         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
420         .driver_data =  (unsigned long) &ohci_pci_hc_driver,
421         }, { /* end: all zeroes */ }
422 };
423 MODULE_DEVICE_TABLE (pci, pci_ids);
424
425 /* pci driver glue; this is a "new style" PCI driver module */
426 static struct pci_driver ohci_pci_driver = {
427         .name =         (char *) hcd_name,
428         .id_table =     pci_ids,
429
430         .probe =        usb_hcd_pci_probe,
431         .remove =       usb_hcd_pci_remove,
432         .shutdown =     usb_hcd_pci_shutdown,
433
434 #ifdef CONFIG_PM_SLEEP
435         .driver =       {
436                 .pm =   &usb_hcd_pci_pm_ops
437         },
438 #endif
439 };