Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks...
[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 static void sb800_prefetch(struct ohci_hcd *ohci, int on)
179 {
180         struct pci_dev *pdev;
181         u16 misc;
182
183         pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
184         pci_read_config_word(pdev, 0x50, &misc);
185         if (on == 0)
186                 pci_write_config_word(pdev, 0x50, misc & 0xfcff);
187         else
188                 pci_write_config_word(pdev, 0x50, misc | 0x0300);
189 }
190
191 /* List of quirks for OHCI */
192 static const struct pci_device_id ohci_pci_quirks[] = {
193         {
194                 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
195                 .driver_data = (unsigned long)ohci_quirk_amd756,
196         },
197         {
198                 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
199                 .driver_data = (unsigned long)ohci_quirk_opti,
200         },
201         {
202                 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
203                 .driver_data = (unsigned long)ohci_quirk_ns,
204         },
205         {
206                 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
207                 .driver_data = (unsigned long)ohci_quirk_zfmicro,
208         },
209         {
210                 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
211                 .driver_data = (unsigned long)ohci_quirk_toshiba_scc,
212         },
213         {
214                 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
215                 .driver_data = (unsigned long)ohci_quirk_nec,
216         },
217         {
218                 /* Toshiba portege 4000 */
219                 .vendor         = PCI_VENDOR_ID_AL,
220                 .device         = 0x5237,
221                 .subvendor      = PCI_VENDOR_ID_TOSHIBA,
222                 .subdevice      = 0x0004,
223                 .driver_data    = (unsigned long) broken_suspend,
224         },
225         {
226                 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
227                 .driver_data = (unsigned long) broken_suspend,
228         },
229         {
230                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397),
231                 .driver_data = (unsigned long)ohci_quirk_amd700,
232         },
233         {
234                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398),
235                 .driver_data = (unsigned long)ohci_quirk_amd700,
236         },
237         {
238                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399),
239                 .driver_data = (unsigned long)ohci_quirk_amd700,
240         },
241
242         /* FIXME for some of the early AMD 760 southbridges, OHCI
243          * won't work at all.  blacklist them.
244          */
245
246         {},
247 };
248
249 static int ohci_pci_reset (struct usb_hcd *hcd)
250 {
251         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
252         int ret = 0;
253
254         if (hcd->self.controller) {
255                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
256                 const struct pci_device_id *quirk_id;
257
258                 quirk_id = pci_match_id(ohci_pci_quirks, pdev);
259                 if (quirk_id != NULL) {
260                         int (*quirk)(struct usb_hcd *ohci);
261                         quirk = (void *)quirk_id->driver_data;
262                         ret = quirk(hcd);
263                 }
264         }
265         if (ret == 0) {
266                 ohci_hcd_init (ohci);
267                 return ohci_init (ohci);
268         }
269         return ret;
270 }
271
272
273 static int __devinit ohci_pci_start (struct usb_hcd *hcd)
274 {
275         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
276         int             ret;
277
278 #ifdef CONFIG_PM /* avoid warnings about unused pdev */
279         if (hcd->self.controller) {
280                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
281
282                 /* RWC may not be set for add-in PCI cards, since boot
283                  * firmware probably ignored them.  This transfers PCI
284                  * PM wakeup capabilities.
285                  */
286                 if (device_can_wakeup(&pdev->dev))
287                         ohci->hc_control |= OHCI_CTRL_RWC;
288         }
289 #endif /* CONFIG_PM */
290
291         ret = ohci_run (ohci);
292         if (ret < 0) {
293                 ohci_err (ohci, "can't start\n");
294                 ohci_stop (hcd);
295         }
296         return ret;
297 }
298
299 #ifdef  CONFIG_PM
300
301 static int ohci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
302 {
303         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
304         unsigned long   flags;
305         int             rc = 0;
306
307         /* Root hub was already suspended. Disable irq emission and
308          * mark HW unaccessible, bail out if RH has been resumed. Use
309          * the spinlock to properly synchronize with possible pending
310          * RH suspend or resume activity.
311          *
312          * This is still racy as hcd->state is manipulated outside of
313          * any locks =P But that will be a different fix.
314          */
315         spin_lock_irqsave (&ohci->lock, flags);
316         if (hcd->state != HC_STATE_SUSPENDED) {
317                 rc = -EINVAL;
318                 goto bail;
319         }
320         ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
321         (void)ohci_readl(ohci, &ohci->regs->intrdisable);
322
323         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
324  bail:
325         spin_unlock_irqrestore (&ohci->lock, flags);
326
327         return rc;
328 }
329
330
331 static int ohci_pci_resume(struct usb_hcd *hcd, bool hibernated)
332 {
333         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
334
335         /* Make sure resume from hibernation re-enumerates everything */
336         if (hibernated)
337                 ohci_usb_reset(hcd_to_ohci(hcd));
338
339         ohci_finish_controller_resume(hcd);
340         return 0;
341 }
342
343 #endif  /* CONFIG_PM */
344
345
346 /*-------------------------------------------------------------------------*/
347
348 static const struct hc_driver ohci_pci_hc_driver = {
349         .description =          hcd_name,
350         .product_desc =         "OHCI Host Controller",
351         .hcd_priv_size =        sizeof(struct ohci_hcd),
352
353         /*
354          * generic hardware linkage
355          */
356         .irq =                  ohci_irq,
357         .flags =                HCD_MEMORY | HCD_USB11,
358
359         /*
360          * basic lifecycle operations
361          */
362         .reset =                ohci_pci_reset,
363         .start =                ohci_pci_start,
364         .stop =                 ohci_stop,
365         .shutdown =             ohci_shutdown,
366
367 #ifdef  CONFIG_PM
368         .pci_suspend =          ohci_pci_suspend,
369         .pci_resume =           ohci_pci_resume,
370 #endif
371
372         /*
373          * managing i/o requests and associated device resources
374          */
375         .urb_enqueue =          ohci_urb_enqueue,
376         .urb_dequeue =          ohci_urb_dequeue,
377         .endpoint_disable =     ohci_endpoint_disable,
378
379         /*
380          * scheduling support
381          */
382         .get_frame_number =     ohci_get_frame,
383
384         /*
385          * root hub support
386          */
387         .hub_status_data =      ohci_hub_status_data,
388         .hub_control =          ohci_hub_control,
389 #ifdef  CONFIG_PM
390         .bus_suspend =          ohci_bus_suspend,
391         .bus_resume =           ohci_bus_resume,
392 #endif
393         .start_port_reset =     ohci_start_port_reset,
394 };
395
396 /*-------------------------------------------------------------------------*/
397
398
399 static const struct pci_device_id pci_ids [] = { {
400         /* handle any USB OHCI controller */
401         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
402         .driver_data =  (unsigned long) &ohci_pci_hc_driver,
403         }, { /* end: all zeroes */ }
404 };
405 MODULE_DEVICE_TABLE (pci, pci_ids);
406
407 /* pci driver glue; this is a "new style" PCI driver module */
408 static struct pci_driver ohci_pci_driver = {
409         .name =         (char *) hcd_name,
410         .id_table =     pci_ids,
411
412         .probe =        usb_hcd_pci_probe,
413         .remove =       usb_hcd_pci_remove,
414         .shutdown =     usb_hcd_pci_shutdown,
415
416 #ifdef CONFIG_PM_SLEEP
417         .driver =       {
418                 .pm =   &usb_hcd_pci_pm_ops
419         },
420 #endif
421 };