aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host/ohci-pci.c
blob: a9c2ae36c7ad5ce6bf9585fc9b8e418ad10751ba (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 *
 * [ Initialisation is based on Linus'  ]
 * [ uhci code and gregs ohci fragments ]
 * [ (C) Copyright 1999 Linus Torvalds  ]
 * [ (C) Copyright 1999 Gregory P. Smith]
 *
 * PCI Bus Glue
 *
 * This file is licenced under the GPL.
 */

#ifndef CONFIG_PCI
#error "This file is PCI bus glue.  CONFIG_PCI must be defined."
#endif

#include <linux/pci.h>
#include <linux/io.h>


/* constants used to work around PM-related transfer
 * glitches in some AMD 700 series southbridges
 */
#define AB_REG_BAR	0xf0
#define AB_INDX(addr)	((addr) + 0x00)
#define AB_DATA(addr)	((addr) + 0x04)
#define AX_INDXC	0X30
#define AX_DATAC	0x34

#define NB_PCIE_INDX_ADDR	0xe0
#define NB_PCIE_INDX_DATA	0xe4
#define PCIE_P_CNTL		0x10040
#define BIF_NB			0x10002

static struct pci_dev *amd_smbus_dev;
static struct pci_dev *amd_hb_dev;
static int amd_ohci_iso_count;

/*-------------------------------------------------------------------------*/

static int broken_suspend(struct usb_hcd *hcd)
{
	device_init_wakeup(&hcd->self.root_hub->dev, 0);
	return 0;
}

/* AMD 756, for most chips (early revs), corrupts register
 * values on read ... so enable the vendor workaround.
 */
static int ohci_quirk_amd756(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);

	ohci->flags = OHCI_QUIRK_AMD756;
	ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");

	/* also erratum 10 (suspend/resume issues) */
	return broken_suspend(hcd);
}

/* Apple's OHCI driver has a lot of bizarre workarounds
 * for this chip.  Evidently control and bulk lists
 * can get confused.  (B&W G3 models, and ...)
 */
static int ohci_quirk_opti(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);

	ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n");

	return 0;
}

/* Check for NSC87560. We have to look at the bridge (fn1) to
 * identify the USB (fn2). This quirk might apply to more or
 * even all NSC stuff.
 */
static int ohci_quirk_ns(struct usb_hcd *hcd)
{
	struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
	struct pci_dev	*b;

	b  = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
	if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
	    && b->vendor == PCI_VENDOR_ID_NS) {
		struct ohci_hcd	*ohci = hcd_to_ohci (hcd);

		ohci->flags |= OHCI_QUIRK_SUPERIO;
		ohci_dbg (ohci, "Using NSC SuperIO setup\n");
	}
	pci_dev_put(b);

	return 0;
}

/* Check for Compaq's ZFMicro chipset, which needs short
 * delays before control or bulk queues get re-activated
 * in finish_unlinks()
 */
static int ohci_quirk_zfmicro(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);

	ohci->flags |= OHCI_QUIRK_ZFMICRO;
	ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n");

	return 0;
}

/* Check for Toshiba SCC OHCI which has big endian registers
 * and little endian in memory data structures
 */
static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);

	/* That chip is only present in the southbridge of some
	 * cell based platforms which are supposed to select
	 * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if
	 * that was the case though.
	 */
#ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
	ohci->flags |= OHCI_QUIRK_BE_MMIO;
	ohci_dbg (ohci, "enabled big endian Toshiba quirk\n");
	return 0;
#else
	ohci_err (ohci, "unsupported big endian Toshiba quirk\n");
	return -ENXIO;
#endif
}

/* Check for NEC chip and apply quirk for allegedly lost interrupts.
 */

static void ohci_quirk_nec_worker(struct work_struct *work)
{
	struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
	int status;

	status = ohci_init(ohci);
	if (status != 0) {
		ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
			 "ohci_init", status);
		return;
	}

	status = ohci_restart(ohci);
	if (status != 0)
		ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
			 "ohci_restart", status);
}

static int ohci_quirk_nec(struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);

	ohci->flags |= OHCI_QUIRK_NEC;
	INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker);
	ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n");

	return 0;
}

static int ohci_quirk_amd700(struct usb_hcd *hcd)
{
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	u8 rev = 0;

	if (!amd_smbus_dev)
		amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
				PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
	if (!amd_smbus_dev)
		return 0;

	pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
	if ((rev > 0x3b) || (rev < 0x30)) {
		pci_dev_put(amd_smbus_dev);
		amd_smbus_dev = NULL;
		return 0;
	}

	amd_ohci_iso_count++;

	if (!amd_hb_dev)
		amd_hb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9600, NULL);

	ohci->flags |= OHCI_QUIRK_AMD_ISO;
	ohci_dbg(ohci, "enabled AMD ISO transfers quirk\n");

	return 0;
}

/*
 * The hardware normally enables the A-link power management feature, which
 * lets the system lower the power consumption in idle states.
 *
 * Assume the system is configured to have USB 1.1 ISO transfers going
 * to or from a USB device.  Without this quirk, that stream may stutter
 * or have breaks occasionally.  For transfers going to speakers, this
 * makes a very audible mess...
 *
 * That audio playback corruption is due to the audio stream getting
 * interrupted occasionally when the link goes in lower power state
 * This USB quirk prevents the link going into that lower power state
 * during audio playback or other ISO operations.
 */
static void quirk_amd_pll(int on)
{
	u32 addr;
	u32 val;
	u32 bit = (on > 0) ? 1 : 0;

	pci_read_config_dword(amd_smbus_dev, AB_REG_BAR, &addr);

	/* BIT names/meanings are NDA-protected, sorry ... */

	outl(AX_INDXC, AB_INDX(addr));
	outl(0x40, AB_DATA(addr));
	outl(AX_DATAC, AB_INDX(addr));
	val = inl(AB_DATA(addr));
	val &= ~((1 << 3) | (1 << 4) | (1 << 9));
	val |= (bit << 3) | ((!bit) << 4) | ((!bit) << 9);
	outl(val, AB_DATA(addr));

	if (amd_hb_dev) {
		addr = PCIE_P_CNTL;
		pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr);

		pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val);
		val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12));
		val |= bit | (bit << 3) | (bit << 12);
		val |= ((!bit) << 4) | ((!bit) << 9);
		pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val);

		addr = BIF_NB;
		pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr);

		pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val);
		val &= ~(1 << 8);
		val |= bit << 8;
		pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val);
	}
}

static void amd_iso_dev_put(void)
{
	amd_ohci_iso_count--;
	if (amd_ohci_iso_count == 0) {
		if (amd_smbus_dev) {
			pci_dev_put(amd_smbus_dev);
			amd_smbus_dev = NULL;
		}
		if (amd_hb_dev) {
			pci_dev_put(amd_hb_dev);
			amd_hb_dev = NULL;
		}
	}

}

/* List of quirks for OHCI */
static const struct pci_device_id ohci_pci_quirks[] = {
	{
		PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
		.driver_data = (unsigned long)ohci_quirk_amd756,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
		.driver_data = (unsigned long)ohci_quirk_opti,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
		.driver_data = (unsigned long)ohci_quirk_ns,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
		.driver_data = (unsigned long)ohci_quirk_zfmicro,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
		.driver_data = (unsigned long)ohci_quirk_toshiba_scc,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
		.driver_data = (unsigned long)ohci_quirk_nec,
	},
	{
		/* Toshiba portege 4000 */
		.vendor		= PCI_VENDOR_ID_AL,
		.device		= 0x5237,
		.subvendor	= PCI_VENDOR_ID_TOSHIBA,
		.subdevice	= 0x0004,
		.driver_data	= (unsigned long) broken_suspend,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
		.driver_data = (unsigned long) broken_suspend,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397),
		.driver_data = (unsigned long)ohci_quirk_amd700,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398),
		.driver_data = (unsigned long)ohci_quirk_amd700,
	},
	{
		PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399),
		.driver_data = (unsigned long)ohci_quirk_amd700,
	},

	/* FIXME for some of the early AMD 760 southbridges, OHCI
	 * won't work at all.  blacklist them.
	 */

	{},
};

static int ohci_pci_reset (struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
	int ret = 0;

	if (hcd->self.controller) {
		struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
		const struct pci_device_id *quirk_id;

		quirk_id = pci_match_id(ohci_pci_quirks, pdev);
		if (quirk_id != NULL) {
			int (*quirk)(struct usb_hcd *ohci);
			quirk = (void *)quirk_id->driver_data;
			ret = quirk(hcd);
		}
	}
	if (ret == 0) {
		ohci_hcd_init (ohci);
		return ohci_init (ohci);
	}
	return ret;
}


static int __devinit ohci_pci_start (struct usb_hcd *hcd)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
	int		ret;

#ifdef CONFIG_PM /* avoid warnings about unused pdev */
	if (hcd->self.controller) {
		struct pci_dev *pdev = to_pci_dev(hcd->self.controller);

		/* RWC may not be set for add-in PCI cards, since boot
		 * firmware probably ignored them.  This transfers PCI
		 * PM wakeup capabilities (once the PCI layer is fixed).
		 */
		if (device_may_wakeup(&pdev->dev))
			ohci->hc_control |= OHCI_CTRL_RWC;
	}
#endif /* CONFIG_PM */

	ret = ohci_run (ohci);
	if (ret < 0) {
		ohci_err (ohci, "can't start\n");
		ohci_stop (hcd);
	}
	return ret;
}

#ifdef	CONFIG_PM

static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
{
	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
	unsigned long	flags;
	int		rc = 0;

	/* Root hub was already suspended. Disable irq emission and
	 * mark HW unaccessible, bail out if RH has been resumed. Use
	 * the spinlock to properly synchronize with possible pending
	 * RH suspend or resume activity.
	 *
	 * This is still racy as hcd->state is manipulated outside of
	 * any locks =P But that will be a different fix.
	 */
	spin_lock_irqsave (&ohci->lock, flags);
	if (hcd->state != HC_STATE_SUSPENDED) {
		rc = -EINVAL;
		goto bail;
	}
	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
	(void)ohci_readl(ohci, &ohci->regs->intrdisable);

	/* make sure snapshot being resumed re-enumerates everything */
	if (message.event == PM_EVENT_PRETHAW)
		ohci_usb_reset(ohci);

	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 bail:
	spin_unlock_irqrestore (&ohci->lock, flags);

	return rc;
}


static int ohci_pci_resume (struct usb_hcd *hcd)
{
	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
	ohci_finish_controller_resume(hcd);
	return 0;
}

#endif	/* CONFIG_PM */


/*-------------------------------------------------------------------------*/

static const struct hc_driver ohci_pci_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"OHCI Host Controller",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	/*
	 * generic hardware linkage
	 */
	.irq =			ohci_irq,
	.flags =		HCD_MEMORY | HCD_USB11,

	/*
	 * basic lifecycle operations
	 */
	.reset =		ohci_pci_reset,
	.start =		ohci_pci_start,
	.stop =			ohci_stop,
	.shutdown =		ohci_shutdown,

#ifdef	CONFIG_PM
	.pci_suspend =		ohci_pci_suspend,
	.pci_resume =		ohci_pci_resume,
#endif

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,

	/*
	 * scheduling support
	 */
	.get_frame_number =	ohci_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	ohci_hub_status_data,
	.hub_control =		ohci_hub_control,
#ifdef	CONFIG_PM
	.bus_suspend =		ohci_bus_suspend,
	.bus_resume =		ohci_bus_resume,
#endif
	.start_port_reset =	ohci_start_port_reset,
};

/*-------------------------------------------------------------------------*/


static const struct pci_device_id pci_ids [] = { {
	/* handle any USB OHCI controller */
	PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
	.driver_data =	(unsigned long) &ohci_pci_hc_driver,
	}, { /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE (pci, pci_ids);

/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver ohci_pci_driver = {
	.name =		(char *) hcd_name,
	.id_table =	pci_ids,

	.probe =	usb_hcd_pci_probe,
	.remove =	usb_hcd_pci_remove,

#ifdef	CONFIG_PM
	.suspend =	usb_hcd_pci_suspend,
	.resume =	usb_hcd_pci_resume,
#endif

	.shutdown =	usb_hcd_pci_shutdown,
};