setup-pci.c 21.5 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
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
/*
 *  linux/drivers/ide/setup-pci.c		Version 1.10	2002/08/19
 *
 *  Copyright (c) 1998-2000  Andre Hedrick <andre@linux-ide.org>
 *
 *  Copyright (c) 1995-1998  Mark Lord
 *  May be copied or modified under the terms of the GNU General Public License
 */

/*
 *  This module provides support for automatic detection and
 *  configuration of all PCI IDE interfaces present in a system.  
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ide.h>
#include <linux/dma-mapping.h>

#include <asm/io.h>
#include <asm/irq.h>


/**
 *	ide_match_hwif	-	match a PCI IDE against an ide_hwif
 *	@io_base: I/O base of device
 *	@bootable: set if its bootable
 *	@name: name of device
 *
 *	Match a PCI IDE port against an entry in ide_hwifs[],
 *	based on io_base port if possible. Return the matching hwif,
 *	or a new hwif. If we find an error (clashing, out of devices, etc)
 *	return NULL
 *
 *	FIXME: we need to handle mmio matches here too
 */

static ide_hwif_t *ide_match_hwif(unsigned long io_base, u8 bootable, const char *name)
{
	int h;
	ide_hwif_t *hwif;

	/*
	 * Look for a hwif with matching io_base specified using
	 * parameters to ide_setup().
	 */
	for (h = 0; h < MAX_HWIFS; ++h) {
		hwif = &ide_hwifs[h];
		if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
			if (hwif->chipset == ide_forced)
				return hwif; /* a perfect match */
		}
	}
	/*
	 * Look for a hwif with matching io_base default value.
	 * If chipset is "ide_unknown", then claim that hwif slot.
	 * Otherwise, some other chipset has already claimed it..  :(
	 */
	for (h = 0; h < MAX_HWIFS; ++h) {
		hwif = &ide_hwifs[h];
		if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
			if (hwif->chipset == ide_unknown)
				return hwif; /* match */
			printk(KERN_ERR "%s: port 0x%04lx already claimed by %s\n",
				name, io_base, hwif->name);
			return NULL;	/* already claimed */
		}
	}
	/*
	 * Okay, there is no hwif matching our io_base,
	 * so we'll just claim an unassigned slot.
	 * Give preference to claiming other slots before claiming ide0/ide1,
	 * just in case there's another interface yet-to-be-scanned
	 * which uses ports 1f0/170 (the ide0/ide1 defaults).
	 *
	 * Unless there is a bootable card that does not use the standard
	 * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.
	 */
	if (bootable) {
		for (h = 0; h < MAX_HWIFS; ++h) {
			hwif = &ide_hwifs[h];
			if (hwif->chipset == ide_unknown)
				return hwif;	/* pick an unused entry */
		}
	} else {
		for (h = 2; h < MAX_HWIFS; ++h) {
			hwif = ide_hwifs + h;
			if (hwif->chipset == ide_unknown)
				return hwif;	/* pick an unused entry */
		}
	}
98
	for (h = 0; h < 2 && h < MAX_HWIFS; ++h) {
Linus Torvalds's avatar
Linus Torvalds committed
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
		hwif = ide_hwifs + h;
		if (hwif->chipset == ide_unknown)
			return hwif;	/* pick an unused entry */
	}
	printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", name);
	return NULL;
}

/**
 *	ide_setup_pci_baseregs	-	place a PCI IDE controller native
 *	@dev: PCI device of interface to switch native
 *	@name: Name of interface
 *
 *	We attempt to place the PCI interface into PCI native mode. If
 *	we succeed the BARs are ok and the controller is in PCI mode.
 *	Returns 0 on success or an errno code. 
 *
 *	FIXME: if we program the interface and then fail to set the BARS
 *	we don't switch it back to legacy mode. Do we actually care ??
 */
 
static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name)
{
	u8 progif = 0;

	/*
	 * Place both IDE interfaces into PCI "native" mode:
	 */
	if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
			 (progif & 5) != 5) {
		if ((progif & 0xa) != 0xa) {
			printk(KERN_INFO "%s: device not capable of full "
				"native PCI mode\n", name);
			return -EOPNOTSUPP;
		}
		printk("%s: placing both ports into native PCI mode\n", name);
		(void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
		if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
		    (progif & 5) != 5) {
			printk(KERN_ERR "%s: rewrite of PROGIF failed, wanted "
				"0x%04x, got 0x%04x\n",
				name, progif|5, progif);
			return -EOPNOTSUPP;
		}
	}
	return 0;
}

#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
/**
 *	ide_get_or_set_dma_base		-	setup BMIBA
150
 *	@d: IDE pci device data
Linus Torvalds's avatar
Linus Torvalds committed
151
152
 *	@hwif: Interface
 *
153
154
155
 *	Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
 *	Where a device has a partner that is already in DMA mode we check
 *	and enforce IDE simplex rules.
Linus Torvalds's avatar
Linus Torvalds committed
156
157
 */

158
static unsigned long ide_get_or_set_dma_base(ide_pci_device_t *d, ide_hwif_t *hwif)
Linus Torvalds's avatar
Linus Torvalds committed
159
160
161
162
163
164
165
166
167
168
{
	unsigned long	dma_base = 0;
	struct pci_dev	*dev = hwif->pci_dev;

	if (hwif->mmio)
		return hwif->dma_base;

	if (hwif->mate && hwif->mate->dma_base) {
		dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
	} else {
169
170
171
172
173
174
		u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;

		dma_base = pci_resource_start(dev, baridx);

		if (dma_base == 0)
			printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
Linus Torvalds's avatar
Linus Torvalds committed
175
176
	}

177
	if ((d->host_flags & IDE_HFLAG_CS5520) == 0 && dma_base) {
Linus Torvalds's avatar
Linus Torvalds committed
178
179
180
181
182
183
184
185
186
		u8 simplex_stat = 0;
		dma_base += hwif->channel ? 8 : 0;

		switch(dev->device) {
			case PCI_DEVICE_ID_AL_M5219:
			case PCI_DEVICE_ID_AL_M5229:
			case PCI_DEVICE_ID_AMD_VIPER_7409:
			case PCI_DEVICE_ID_CMD_643:
			case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
187
			case PCI_DEVICE_ID_REVOLUTION:
188
189
190
				simplex_stat = inb(dma_base + 2);
				outb(simplex_stat & 0x60, dma_base + 2);
				simplex_stat = inb(dma_base + 2);
Linus Torvalds's avatar
Linus Torvalds committed
191
192
				if (simplex_stat & 0x80) {
					printk(KERN_INFO "%s: simplex device: "
193
194
							 "DMA forced\n",
							 d->name);
Linus Torvalds's avatar
Linus Torvalds committed
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
				}
				break;
			default:
				/*
				 * If the device claims "simplex" DMA,
				 * this means only one of the two interfaces
				 * can be trusted with DMA at any point in time.
				 * So we should enable DMA only on one of the
				 * two interfaces.
				 */
				simplex_stat = hwif->INB(dma_base + 2);
				if (simplex_stat & 0x80) {
					/* simplex device? */
/*
 *	At this point we haven't probed the drives so we can't make the
 *	appropriate decision. Really we should defer this problem
 *	until we tune the drive then try to grab DMA ownership if we want
 *	to be the DMA end. This has to be become dynamic to handle hot
 *	plug.
 */
					if (hwif->mate && hwif->mate->dma_base) {
						printk(KERN_INFO "%s: simplex device: "
217
218
								 "DMA disabled\n",
								 d->name);
Linus Torvalds's avatar
Linus Torvalds committed
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
						dma_base = 0;
					}
				}
		}
	}
	return dma_base;
}
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */

void ide_setup_pci_noise (struct pci_dev *dev, ide_pci_device_t *d)
{
	printk(KERN_INFO "%s: IDE controller at PCI slot %s\n",
			 d->name, pci_name(dev));
}

EXPORT_SYMBOL_GPL(ide_setup_pci_noise);


/**
 *	ide_pci_enable	-	do PCI enables
 *	@dev: PCI device
 *	@d: IDE pci device data
 *
 *	Enable the IDE PCI device. We attempt to enable the device in full
 *	but if that fails then we only need BAR4 so we will enable that.
 *	
 *	Returns zero on success or an error code
 */
 
static int ide_pci_enable(struct pci_dev *dev, ide_pci_device_t *d)
{
	int ret;

	if (pci_enable_device(dev)) {
		ret = pci_enable_device_bars(dev, 1 << 4);
		if (ret < 0) {
			printk(KERN_WARNING "%s: (ide_setup_pci_device:) "
				"Could not enable device.\n", d->name);
			goto out;
		}
		printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name);
	}

	/*
	 * assume all devices can do 32-bit dma for now. we can add a
	 * dma mask field to the ide_pci_device_t if we need it (or let
	 * lower level driver set the dma mask)
	 */
	ret = pci_set_dma_mask(dev, DMA_32BIT_MASK);
	if (ret < 0) {
		printk(KERN_ERR "%s: can't set dma mask\n", d->name);
		goto out;
	}

	/* FIXME: Temporary - until we put in the hotplug interface logic
	   Check that the bits we want are not in use by someone else. */
	ret = pci_request_region(dev, 4, "ide_tmp");
	if (ret < 0)
		goto out;

	pci_release_region(dev, 4);
out:
	return ret;
}

/**
 *	ide_pci_configure	-	configure an unconfigured device
 *	@dev: PCI device
 *	@d: IDE pci device data
 *
 *	Enable and configure the PCI device we have been passed.
 *	Returns zero on success or an error code.
 */
 
static int ide_pci_configure(struct pci_dev *dev, ide_pci_device_t *d)
{
	u16 pcicmd = 0;
	/*
	 * PnP BIOS was *supposed* to have setup this device, but we
	 * can do it ourselves, so long as the BIOS has assigned an IRQ
	 * (or possibly the device is using a "legacy header" for IRQs).
	 * Maybe the user deliberately *disabled* the device,
	 * but we'll eventually ignore it again if no drives respond.
	 */
	if (ide_setup_pci_baseregs(dev, d->name) || pci_write_config_word(dev, PCI_COMMAND, pcicmd|PCI_COMMAND_IO)) 
	{
		printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name);
		return -ENODEV;
	}
	if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
		printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
		return -EIO;
	}
	if (!(pcicmd & PCI_COMMAND_IO)) {
		printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name);
		return -ENXIO;
	}
	return 0;
}

/**
 *	ide_pci_check_iomem	-	check a register is I/O
 *	@dev: pci device
 *	@d: ide_pci_device
 *	@bar: bar number
 *
 *	Checks if a BAR is configured and points to MMIO space. If so
 *	print an error and return an error code. Otherwise return 0
 */
 
static int ide_pci_check_iomem(struct pci_dev *dev, ide_pci_device_t *d, int bar)
{
	ulong flags = pci_resource_flags(dev, bar);
	
	/* Unconfigured ? */
	if (!flags || pci_resource_len(dev, bar) == 0)
		return 0;

	/* I/O space */		
	if(flags & PCI_BASE_ADDRESS_IO_MASK)
		return 0;
		
	/* Bad */
	printk(KERN_ERR "%s: IO baseregs (BIOS) are reported "
			"as MEM, report to "
			"<andre@linux-ide.org>.\n", d->name);
	return -EINVAL;
}

/**
 *	ide_hwif_configure	-	configure an IDE interface
 *	@dev: PCI device holding interface
 *	@d: IDE pci data
 *	@mate: Paired interface if any
 *
 *	Perform the initial set up for the hardware interface structure. This
 *	is done per interface port rather than per PCI device. There may be
 *	more than one port per device.
 *
 *	Returns the new hardware interface structure, or NULL on a failure
 */
 
static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *mate, int port, int irq)
{
	unsigned long ctl = 0, base = 0;
	ide_hwif_t *hwif;
365
	u8 bootable = (d->host_flags & IDE_HFLAG_BOOTABLE) ? 1 : 0;
Linus Torvalds's avatar
Linus Torvalds committed
366

367
	if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
Linus Torvalds's avatar
Linus Torvalds committed
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
		/*  Possibly we should fail if these checks report true */
		ide_pci_check_iomem(dev, d, 2*port);
		ide_pci_check_iomem(dev, d, 2*port+1);
 
		ctl  = pci_resource_start(dev, 2*port+1);
		base = pci_resource_start(dev, 2*port);
		if ((ctl && !base) || (base && !ctl)) {
			printk(KERN_ERR "%s: inconsistent baseregs (BIOS) "
				"for port %d, skipping\n", d->name, port);
			return NULL;
		}
	}
	if (!ctl)
	{
		/* Use default values */
		ctl = port ? 0x374 : 0x3f4;
		base = port ? 0x170 : 0x1f0;
	}
386
	if ((hwif = ide_match_hwif(base, bootable, d->name)) == NULL)
Linus Torvalds's avatar
Linus Torvalds committed
387
388
389
		return NULL;	/* no room in ide_hwifs[] */
	if (hwif->io_ports[IDE_DATA_OFFSET] != base ||
	    hwif->io_ports[IDE_CONTROL_OFFSET] != (ctl | 2)) {
390
391
392
		hw_regs_t hw;

		memset(&hw, 0, sizeof(hw));
393
#ifndef CONFIG_IDE_ARCH_OBSOLETE_INIT
394
		ide_std_init_ports(&hw, base, ctl | 2);
Linus Torvalds's avatar
Linus Torvalds committed
395
#else
396
		ide_init_hwif_ports(&hw, base, ctl | 2, NULL);
Linus Torvalds's avatar
Linus Torvalds committed
397
#endif
398
		memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
Linus Torvalds's avatar
Linus Torvalds committed
399
400
		hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
	}
401
	hwif->chipset = d->chipset ? d->chipset : ide_pci;
Linus Torvalds's avatar
Linus Torvalds committed
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
	hwif->pci_dev = dev;
	hwif->cds = (struct ide_pci_device_s *) d;
	hwif->channel = port;

	if (!hwif->irq)
		hwif->irq = irq;
	if (mate) {
		hwif->mate = mate;
		mate->mate = hwif;
	}
	return hwif;
}

/**
 *	ide_hwif_setup_dma	-	configure DMA interface
 *	@dev: PCI device
 *	@d: IDE pci data
 *	@hwif: Hardware interface we are configuring
 *
 *	Set up the DMA base for the interface. Enable the master bits as
 *	necessary and attempt to bring the device DMA into a ready to use
 *	state
 */
 
#ifndef CONFIG_BLK_DEV_IDEDMA_PCI
static void ide_hwif_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif)
{
}
#else
static void ide_hwif_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif)
{
	u16 pcicmd;
434

Linus Torvalds's avatar
Linus Torvalds committed
435
436
	pci_read_config_word(dev, PCI_COMMAND, &pcicmd);

437
	if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
Linus Torvalds's avatar
Linus Torvalds committed
438
439
	    ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
	     (dev->class & 0x80))) {
440
		unsigned long dma_base = ide_get_or_set_dma_base(d, hwif);
Linus Torvalds's avatar
Linus Torvalds committed
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
496
497
498
499
500
501
502
503
504
		if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) {
			/*
 			 * Set up BM-DMA capability
			 * (PnP BIOS should have done this)
 			 */
			pci_set_master(dev);
			if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) {
				printk(KERN_ERR "%s: %s error updating PCICMD\n",
					hwif->name, d->name);
				dma_base = 0;
			}
		}
		if (dma_base) {
			if (d->init_dma) {
				d->init_dma(hwif, dma_base);
			} else {
				ide_setup_dma(hwif, dma_base, 8);
			}
		} else {
			printk(KERN_INFO "%s: %s Bus-Master DMA disabled "
				"(BIOS)\n", hwif->name, d->name);
		}
	}
}
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI*/

/**
 *	ide_setup_pci_controller	-	set up IDE PCI
 *	@dev: PCI device
 *	@d: IDE PCI data
 *	@noisy: verbose flag
 *	@config: returned as 1 if we configured the hardware
 *
 *	Set up the PCI and controller side of the IDE interface. This brings
 *	up the PCI side of the device, checks that the device is enabled
 *	and enables it if need be
 */
 
static int ide_setup_pci_controller(struct pci_dev *dev, ide_pci_device_t *d, int noisy, int *config)
{
	int ret;
	u16 pcicmd;

	if (noisy)
		ide_setup_pci_noise(dev, d);

	ret = ide_pci_enable(dev, d);
	if (ret < 0)
		goto out;

	ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
	if (ret < 0) {
		printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
		goto out;
	}
	if (!(pcicmd & PCI_COMMAND_IO)) {	/* is device disabled? */
		ret = ide_pci_configure(dev, d);
		if (ret < 0)
			goto out;
		*config = 1;
		printk(KERN_INFO "%s: device enabled (Linux)\n", d->name);
	}

	if (noisy)
505
506
		printk(KERN_INFO "%s: chipset revision %d\n",
				 d->name, dev->revision);
Linus Torvalds's avatar
Linus Torvalds committed
507
508
509
510
511
512
513
514
515
out:
	return ret;
}

/**
 *	ide_pci_setup_ports	-	configure ports/devices on PCI IDE
 *	@dev: PCI device
 *	@d: IDE pci device info
 *	@pciirq: IRQ line
516
 *	@idx: ATA index table to update
Linus Torvalds's avatar
Linus Torvalds committed
517
518
519
520
521
522
523
524
525
 *
 *	Scan the interfaces attached to this device and do any
 *	necessary per port setup. Attach the devices and ask the
 *	generic DMA layer to do its work for us.
 *
 *	Normally called automaticall from do_ide_pci_setup_device,
 *	but is also used directly as a helper function by some controllers
 *	where the chipset setup is not the default PCI IDE one.
 */
526
527

void ide_pci_setup_ports(struct pci_dev *dev, ide_pci_device_t *d, int pciirq, u8 *idx)
Linus Torvalds's avatar
Linus Torvalds committed
528
{
529
	int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
Linus Torvalds's avatar
Linus Torvalds committed
530
531
532
533
534
535
	ide_hwif_t *hwif, *mate = NULL;
	u8 tmp;

	/*
	 * Set up the IDE ports
	 */
536

537
	for (port = 0; port < channels; ++port) {
Linus Torvalds's avatar
Linus Torvalds committed
538
539
540
		ide_pci_enablebit_t *e = &(d->enablebits[port]);
	
		if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
541
542
		    (tmp & e->mask) != e->val)) {
			printk(KERN_INFO "%s: IDE port disabled\n", d->name);
Linus Torvalds's avatar
Linus Torvalds committed
543
			continue;	/* port not enabled */
544
		}
Linus Torvalds's avatar
Linus Torvalds committed
545
546
547
548
549
550
551

		if ((hwif = ide_hwif_configure(dev, d, mate, port, pciirq)) == NULL)
			continue;

		/* setup proper ancestral information */
		hwif->gendev.parent = &dev->dev;

552
		*(idx + port) = hwif->index;
Linus Torvalds's avatar
Linus Torvalds committed
553
554
555
556
557

		
		if (d->init_iops)
			d->init_iops(hwif);

558
		if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
Linus Torvalds's avatar
Linus Torvalds committed
559
			ide_hwif_setup_dma(dev, d, hwif);
560

561
562
		if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
		    (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
563
564
			hwif->irq = port ? 15 : 14;

565
566
		hwif->fixup = d->fixup;

567
		hwif->host_flags = d->host_flags;
Bartlomiej Zolnierkiewicz's avatar
Bartlomiej Zolnierkiewicz committed
568
		hwif->pio_mask = d->pio_mask;
569

570
571
572
		if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
			hwif->mate->serialized = hwif->serialized = 1;

573
574
575
576
577
578
579
580
581
582
		if (d->host_flags & IDE_HFLAG_IO_32BIT) {
			hwif->drives[0].io_32bit = 1;
			hwif->drives[1].io_32bit = 1;
		}

		if (d->host_flags & IDE_HFLAG_UNMASK_IRQS) {
			hwif->drives[0].unmask = 1;
			hwif->drives[1].unmask = 1;
		}

583
584
585
586
587
588
		if (hwif->dma_base) {
			hwif->swdma_mask = d->swdma_mask;
			hwif->mwdma_mask = d->mwdma_mask;
			hwif->ultra_mask = d->udma_mask;
		}

589
590
591
		hwif->drives[0].autotune = 1;
		hwif->drives[1].autotune = 1;

592
593
594
		if (d->host_flags & IDE_HFLAG_RQSIZE_256)
			hwif->rqsize = 256;

Linus Torvalds's avatar
Linus Torvalds committed
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
		if (d->init_hwif)
			/* Call chipset-specific routine
			 * for each enabled hwif
			 */
			d->init_hwif(hwif);

		mate = hwif;
	}
}

EXPORT_SYMBOL_GPL(ide_pci_setup_ports);

/*
 * ide_setup_pci_device() looks at the primary/secondary interfaces
 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
 * for use with them.  This generic code works for most PCI chipsets.
 *
 * One thing that is not standardized is the location of the
 * primary/secondary interface "enable/disable" bits.  For chipsets that
 * we "know" about, this information is in the ide_pci_device_t struct;
 * for all other chipsets, we just assume both interfaces are enabled.
 */
static int do_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t *d,
618
				   u8 *idx, u8 noisy)
Linus Torvalds's avatar
Linus Torvalds committed
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
{
	int tried_config = 0;
	int pciirq, ret;

	ret = ide_setup_pci_controller(dev, d, noisy, &tried_config);
	if (ret < 0)
		goto out;

	/*
	 * Can we trust the reported IRQ?
	 */
	pciirq = dev->irq;

	/* Is it an "IDE storage" device in non-PCI mode? */
	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) {
		if (noisy)
			printk(KERN_INFO "%s: not 100%% native mode: "
				"will probe irqs later\n", d->name);
		/*
		 * This allows offboard ide-pci cards the enable a BIOS,
		 * verify interrupt settings of split-mirror pci-config
		 * space, place chipset into init-mode, and/or preserve
		 * an interrupt if the card is not native ide support.
		 */
		ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0;
		if (ret < 0)
			goto out;
		pciirq = ret;
	} else if (tried_config) {
		if (noisy)
			printk(KERN_INFO "%s: will probe irqs later\n", d->name);
		pciirq = 0;
	} else if (!pciirq) {
		if (noisy)
			printk(KERN_WARNING "%s: bad irq (%d): will probe later\n",
				d->name, pciirq);
		pciirq = 0;
	} else {
		if (d->init_chipset) {
			ret = d->init_chipset(dev, d->name);
			if (ret < 0)
				goto out;
		}
		if (noisy)
			printk(KERN_INFO "%s: 100%% native mode on irq %d\n",
				d->name, pciirq);
	}

	/* FIXME: silent failure can happen */

669
	ide_pci_setup_ports(dev, d, pciirq, idx);
Linus Torvalds's avatar
Linus Torvalds committed
670
671
672
673
674
675
out:
	return ret;
}

int ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t *d)
{
676
	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds's avatar
Linus Torvalds committed
677
678
	int ret;

679
	ret = do_ide_setup_pci_device(dev, d, &idx[0], 1);
Linus Torvalds's avatar
Linus Torvalds committed
680

681
682
	if (ret >= 0)
		ide_device_add(idx);
Linus Torvalds's avatar
Linus Torvalds committed
683
684
685
686
687
688
689
690
691
692
693

	return ret;
}

EXPORT_SYMBOL_GPL(ide_setup_pci_device);

int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
			  ide_pci_device_t *d)
{
	struct pci_dev *pdev[] = { dev1, dev2 };
	int ret, i;
694
	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds's avatar
Linus Torvalds committed
695
696

	for (i = 0; i < 2; i++) {
697
		ret = do_ide_setup_pci_device(pdev[i], d, &idx[i*2], !i);
Linus Torvalds's avatar
Linus Torvalds committed
698
699
700
701
702
703
704
705
		/*
		 * FIXME: Mom, mom, they stole me the helper function to undo
		 * do_ide_setup_pci_device() on the first device!
		 */
		if (ret < 0)
			goto out;
	}

706
	ide_device_add(idx);
Linus Torvalds's avatar
Linus Torvalds committed
707
708
709
710
711
712
out:
	return ret;
}

EXPORT_SYMBOL_GPL(ide_setup_pci_devices);

713
#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
Linus Torvalds's avatar
Linus Torvalds committed
714
715
716
717
718
719
720
721
/*
 *	Module interfaces
 */
 
static int pre_init = 1;		/* Before first ordered IDE scan */
static LIST_HEAD(ide_pci_drivers);

/*
722
 *	__ide_pci_register_driver	-	attach IDE driver
Linus Torvalds's avatar
Linus Torvalds committed
723
 *	@driver: pci driver
724
 *	@module: owner module of the driver
Linus Torvalds's avatar
Linus Torvalds committed
725
726
727
728
729
730
731
732
733
734
735
736
 *
 *	Registers a driver with the IDE layer. The IDE layer arranges that
 *	boot time setup is done in the expected device order and then 
 *	hands the controllers off to the core PCI code to do the rest of
 *	the work.
 *
 *	The driver_data of the driver table must point to an ide_pci_device_t
 *	describing the interface.
 *
 *	Returns are the same as for pci_register_driver
 */

737
738
int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
			      const char *mod_name)
Linus Torvalds's avatar
Linus Torvalds committed
739
740
{
	if(!pre_init)
741
		return __pci_register_driver(driver, module, mod_name);
742
	driver->driver.owner = module;
Linus Torvalds's avatar
Linus Torvalds committed
743
744
745
746
	list_add_tail(&driver->node, &ide_pci_drivers);
	return 0;
}

747
EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
Linus Torvalds's avatar
Linus Torvalds committed
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762

/**
 *	ide_scan_pcidev		-	find an IDE driver for a device
 *	@dev: PCI device to check
 *
 *	Look for an IDE driver to handle the device we are considering.
 *	This is only used during boot up to get the ordering correct. After
 *	boot up the pci layer takes over the job.
 */
 
static int __init ide_scan_pcidev(struct pci_dev *dev)
{
	struct list_head *l;
	struct pci_driver *d;
	
Sergei Shtylyov's avatar
Sergei Shtylyov committed
763
	list_for_each(l, &ide_pci_drivers) {
Linus Torvalds's avatar
Linus Torvalds committed
764
		d = list_entry(l, struct pci_driver, node);
Sergei Shtylyov's avatar
Sergei Shtylyov committed
765
766
767
768
769
770
771
		if (d->id_table) {
			const struct pci_device_id *id = pci_match_id(d->id_table,
								      dev);
			if (id != NULL && d->probe(dev, id) >= 0) {
				dev->driver = d;
				pci_dev_get(dev);
				return 1;
Linus Torvalds's avatar
Linus Torvalds committed
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
			}
		}
	}
	return 0;
}

/**
 *	ide_scan_pcibus		-	perform the initial IDE driver scan
 *	@scan_direction: set for reverse order scanning
 *
 *	Perform the initial bus rather than driver ordered scan of the
 *	PCI drivers. After this all IDE pci handling becomes standard
 *	module ordering not traditionally ordered.
 */
 	
void __init ide_scan_pcibus (int scan_direction)
{
	struct pci_dev *dev = NULL;
	struct pci_driver *d;
	struct list_head *l, *n;

	pre_init = 0;
Sergei Shtylyov's avatar
Sergei Shtylyov committed
794
795
	if (!scan_direction)
		while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
Linus Torvalds's avatar
Linus Torvalds committed
796
			ide_scan_pcidev(dev);
Sergei Shtylyov's avatar
Sergei Shtylyov committed
797
798
799
	else
		while ((dev = pci_get_device_reverse(PCI_ANY_ID, PCI_ANY_ID, dev))
		       != NULL)
Linus Torvalds's avatar
Linus Torvalds committed
800
801
802
803
804
805
806
			ide_scan_pcidev(dev);
	
	/*
	 *	Hand the drivers over to the PCI layer now we
	 *	are post init.
	 */

807
	list_for_each_safe(l, n, &ide_pci_drivers) {
Linus Torvalds's avatar
Linus Torvalds committed
808
809
		list_del(l);
		d = list_entry(l, struct pci_driver, node);
Sergei Shtylyov's avatar
Sergei Shtylyov committed
810
811
812
		if (__pci_register_driver(d, d->driver.owner, d->driver.mod_name))
			printk(KERN_ERR "%s: failed to register driver for %s\n",
			       __FUNCTION__, d->driver.mod_name);
Linus Torvalds's avatar
Linus Torvalds committed
813
814
	}
}
815
#endif