summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/maple/pci.c
blob: 63b4d1bff359b226a4dd882efbe8757dfcdd2e07 (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
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
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
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
/*
 * Copyright (C) 2004 Benjamin Herrenschmuidt (benh@kernel.crashing.org),
 *		      IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#undef DEBUG

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/irq.h>

#include <asm/sections.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <asm/iommu.h>
#include <asm/ppc-pci.h>

#include "maple.h"

#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif

static struct pci_controller *u3_agp, *u3_ht, *u4_pcie;

static int __init fixup_one_level_bus_range(struct device_node *node, int higher)
{
	for (; node != 0;node = node->sibling) {
		const int *bus_range;
		const unsigned int *class_code;
		int len;

		/* For PCI<->PCI bridges or CardBus bridges, we go down */
		class_code = get_property(node, "class-code", NULL);
		if (!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
			(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
			continue;
		bus_range = get_property(node, "bus-range", &len);
		if (bus_range != NULL && len > 2 * sizeof(int)) {
			if (bus_range[1] > higher)
				higher = bus_range[1];
		}
		higher = fixup_one_level_bus_range(node->child, higher);
	}
	return higher;
}

/* This routine fixes the "bus-range" property of all bridges in the
 * system since they tend to have their "last" member wrong on macs
 *
 * Note that the bus numbers manipulated here are OF bus numbers, they
 * are not Linux bus numbers.
 */
static void __init fixup_bus_range(struct device_node *bridge)
{
	int *bus_range;
	struct property *prop;
	int len;

	/* Lookup the "bus-range" property for the hose */
	prop = of_find_property(bridge, "bus-range", &len);
	if (prop == NULL  || prop->value == NULL || len < 2 * sizeof(int)) {
		printk(KERN_WARNING "Can't get bus-range for %s\n",
			       bridge->full_name);
		return;
	}
	bus_range = (int *)prop->value;
	bus_range[1] = fixup_one_level_bus_range(bridge->child, bus_range[1]);
}


static unsigned long u3_agp_cfa0(u8 devfn, u8 off)
{
	return (1 << (unsigned long)PCI_SLOT(devfn)) |
		((unsigned long)PCI_FUNC(devfn) << 8) |
		((unsigned long)off & 0xFCUL);
}

static unsigned long u3_agp_cfa1(u8 bus, u8 devfn, u8 off)
{
	return ((unsigned long)bus << 16) |
		((unsigned long)devfn << 8) |
		((unsigned long)off & 0xFCUL) |
		1UL;
}

static volatile void __iomem *u3_agp_cfg_access(struct pci_controller* hose,
				       u8 bus, u8 dev_fn, u8 offset)
{
	unsigned int caddr;

	if (bus == hose->first_busno) {
		if (dev_fn < (11 << 3))
			return NULL;
		caddr = u3_agp_cfa0(dev_fn, offset);
	} else
		caddr = u3_agp_cfa1(bus, dev_fn, offset);

	/* Uninorth will return garbage if we don't read back the value ! */
	do {
		out_le32(hose->cfg_addr, caddr);
	} while (in_le32(hose->cfg_addr) != caddr);

	offset &= 0x07;
	return hose->cfg_data + offset;
}

static int u3_agp_read_config(struct pci_bus *bus, unsigned int devfn,
			      int offset, int len, u32 *val)
{
	struct pci_controller *hose;
	volatile void __iomem *addr;

	hose = pci_bus_to_host(bus);
	if (hose == NULL)
		return PCIBIOS_DEVICE_NOT_FOUND;

	addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
	if (!addr)
		return PCIBIOS_DEVICE_NOT_FOUND;
	/*
	 * Note: the caller has already checked that offset is
	 * suitably aligned and that len is 1, 2 or 4.
	 */
	switch (len) {
	case 1:
		*val = in_8(addr);
		break;
	case 2:
		*val = in_le16(addr);
		break;
	default:
		*val = in_le32(addr);
		break;
	}
	return PCIBIOS_SUCCESSFUL;
}

static int u3_agp_write_config(struct pci_bus *bus, unsigned int devfn,
			       int offset, int len, u32 val)
{
	struct pci_controller *hose;
	volatile void __iomem *addr;

	hose = pci_bus_to_host(bus);
	if (hose == NULL)
		return PCIBIOS_DEVICE_NOT_FOUND;

	addr = u3_agp_cfg_access(hose, bus->number, devfn, offset);
	if (!addr)
		return PCIBIOS_DEVICE_NOT_FOUND;
	/*
	 * Note: the caller has already checked that offset is
	 * suitably aligned and that len is 1, 2 or 4.
	 */
	switch (len) {
	case 1:
		out_8(addr, val);
		(void) in_8(addr);
		break;
	case 2:
		out_le16(addr, val);
		(void) in_le16(addr);
		break;
	default:
		out_le32(addr, val);
		(void) in_le32(addr);
		break;
	}
	return PCIBIOS_SUCCESSFUL;
}

static struct pci_ops u3_agp_pci_ops =
{
	u3_agp_read_config,
	u3_agp_write_config
};

static unsigned long u3_ht_cfa0(u8 devfn, u8 off)
{
	return (devfn << 8) | off;
}

static unsigned long u3_ht_cfa1(u8 bus, u8 devfn, u8 off)
{
	return u3_ht_cfa0(devfn, off) + (bus << 16) + 0x01000000UL;
}

static volatile void __iomem *u3_ht_cfg_access(struct pci_controller* hose,
				      u8 bus, u8 devfn, u8 offset)
{
	if (bus == hose->first_busno) {
		if (PCI_SLOT(devfn) == 0)
			return NULL;
		return hose->cfg_data + u3_ht_cfa0(devfn, offset);
	} else
		return hose->cfg_data + u3_ht_cfa1(bus, devfn, offset);
}

static int u3_ht_read_config(struct pci_bus *bus, unsigned int devfn,
			     int offset, int len, u32 *val)
{
	struct pci_controller *hose;
	volatile void __iomem *addr;

	hose = pci_bus_to_host(bus);
	if (hose == NULL)
		return PCIBIOS_DEVICE_NOT_FOUND;

	if (offset > 0xff)
		return PCIBIOS_BAD_REGISTER_NUMBER;

	addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
	if (!addr)
		return PCIBIOS_DEVICE_NOT_FOUND;

	/*
	 * Note: the caller has already checked that offset is
	 * suitably aligned and that len is 1, 2 or 4.
	 */
	switch (len) {
	case 1:
		*val = in_8(addr);
		break;
	case 2:
		*val = in_le16(addr);
		break;
	default:
		*val = in_le32(addr);
		break;
	}
	return PCIBIOS_SUCCESSFUL;
}

static int u3_ht_write_config(struct pci_bus *bus, unsigned int devfn,
			      int offset, int len, u32 val)
{
	struct pci_controller *hose;
	volatile void __iomem *addr;

	hose = pci_bus_to_host(bus);
	if (hose == NULL)
		return PCIBIOS_DEVICE_NOT_FOUND;

	if (offset > 0xff)
		return PCIBIOS_BAD_REGISTER_NUMBER;

	addr = u3_ht_cfg_access(hose, bus->number, devfn, offset);
	if (!addr)
		return PCIBIOS_DEVICE_NOT_FOUND;
	/*
	 * Note: the caller has already checked that offset is
	 * suitably aligned and that len is 1, 2 or 4.
	 */
	switch (len) {
	case 1:
		out_8(addr, val);
		(void) in_8(addr);
		break;
	case 2:
		out_le16(addr, val);
		(void) in_le16(addr);
		break;
	default:
		out_le32(addr, val);
		(void) in_le32(addr);
		break;
	}
	return PCIBIOS_SUCCESSFUL;
}

static struct pci_ops u3_ht_pci_ops =
{
	u3_ht_read_config,
	u3_ht_write_config
};

static unsigned int u4_pcie_cfa0(unsigned int devfn, unsigned int off)
{
	return (1 << PCI_SLOT(devfn))	|
	       (PCI_FUNC(devfn) << 8)	|
	       ((off >> 8) << 28) 	|
	       (off & 0xfcu);
}

static unsigned int u4_pcie_cfa1(unsigned int bus, unsigned int devfn,
				 unsigned int off)
{
        return (bus << 16)		|
	       (devfn << 8)		|
	       ((off >> 8) << 28)	|
	       (off & 0xfcu)		| 1u;
}

static volatile void __iomem *u4_pcie_cfg_access(struct pci_controller* hose,
                                        u8 bus, u8 dev_fn, int offset)
{
        unsigned int caddr;

        if (bus == hose->first_busno)
                caddr = u4_pcie_cfa0(dev_fn, offset);
        else
                caddr = u4_pcie_cfa1(bus, dev_fn, offset);

        /* Uninorth will return garbage if we don't read back the value ! */
        do {
                out_le32(hose->cfg_addr, caddr);
        } while (in_le32(hose->cfg_addr) != caddr);

        offset &= 0x03;
        return hose->cfg_data + offset;
}

static int u4_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
                               int offset, int len, u32 *val)
{
        struct pci_controller *hose;
        volatile void __iomem *addr;

        hose = pci_bus_to_host(bus);
        if (hose == NULL)
                return PCIBIOS_DEVICE_NOT_FOUND;
        if (offset >= 0x1000)
                return  PCIBIOS_BAD_REGISTER_NUMBER;
        addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
        if (!addr)
                return PCIBIOS_DEVICE_NOT_FOUND;
        /*
         * Note: the caller has already checked that offset is
         * suitably aligned and that len is 1, 2 or 4.
         */
        switch (len) {
        case 1:
                *val = in_8(addr);
                break;
        case 2:
                *val = in_le16(addr);
                break;
        default:
                *val = in_le32(addr);
                break;
        }
        return PCIBIOS_SUCCESSFUL;
}
static int u4_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
                                int offset, int len, u32 val)
{
        struct pci_controller *hose;
        volatile void __iomem *addr;

        hose = pci_bus_to_host(bus);
        if (hose == NULL)
                return PCIBIOS_DEVICE_NOT_FOUND;
        if (offset >= 0x1000)
                return  PCIBIOS_BAD_REGISTER_NUMBER;
        addr = u4_pcie_cfg_access(hose, bus->number, devfn, offset);
        if (!addr)
                return PCIBIOS_DEVICE_NOT_FOUND;
        /*
         * Note: the caller has already checked that offset is
         * suitably aligned and that len is 1, 2 or 4.
         */
        switch (len) {
        case 1:
                out_8(addr, val);
                (void) in_8(addr);
                break;
        case 2:
                out_le16(addr, val);
                (void) in_le16(addr);
                break;
        default:
                out_le32(addr, val);
                (void) in_le32(addr);
                break;
        }
        return PCIBIOS_SUCCESSFUL;
}

static struct pci_ops u4_pcie_pci_ops =
{
        u4_pcie_read_config,
        u4_pcie_write_config
};

static void __init setup_u3_agp(struct pci_controller* hose)
{
	/* On G5, we move AGP up to high bus number so we don't need
	 * to reassign bus numbers for HT. If we ever have P2P bridges
	 * on AGP, we'll have to move pci_assign_all_buses to the
	 * pci_controller structure so we enable it for AGP and not for
	 * HT childs.
	 * We hard code the address because of the different size of
	 * the reg address cell, we shall fix that by killing struct
	 * reg_property and using some accessor functions instead
	 */
	hose->first_busno = 0xf0;
	hose->last_busno = 0xff;
	hose->ops = &u3_agp_pci_ops;
	hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
	hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);

	u3_agp = hose;
}

static void __init setup_u4_pcie(struct pci_controller* hose)
{
        /* We currently only implement the "non-atomic" config space, to
         * be optimised later.
         */
        hose->ops = &u4_pcie_pci_ops;
        hose->cfg_addr = ioremap(0xf0000000 + 0x800000, 0x1000);
        hose->cfg_data = ioremap(0xf0000000 + 0xc00000, 0x1000);

        /* The bus contains a bridge from root -> device, we need to
         * make it visible on bus 0 so that we pick the right type
         * of config cycles. If we didn't, we would have to force all
         * config cycles to be type 1. So we override the "bus-range"
         * property here
         */
        hose->first_busno = 0x00;
        hose->last_busno = 0xff;
        u4_pcie = hose;
}

static void __init setup_u3_ht(struct pci_controller* hose)
{
	hose->ops = &u3_ht_pci_ops;

	/* We hard code the address because of the different size of
	 * the reg address cell, we shall fix that by killing struct
	 * reg_property and using some accessor functions instead
	 */
	hose->cfg_data = ioremap(0xf2000000, 0x02000000);

	hose->first_busno = 0;
	hose->last_busno = 0xef;

	u3_ht = hose;
}

static int __init add_bridge(struct device_node *dev)
{
	int len;
	struct pci_controller *hose;
	char* disp_name;
	const int *bus_range;
	int primary = 1;

	DBG("Adding PCI host bridge %s\n", dev->full_name);

	bus_range = get_property(dev, "bus-range", &len);
	if (bus_range == NULL || len < 2 * sizeof(int)) {
		printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
		dev->full_name);
	}

	hose = pcibios_alloc_controller(dev);
	if (hose == NULL)
		return -ENOMEM;
	hose->first_busno = bus_range ? bus_range[0] : 0;
	hose->last_busno = bus_range ? bus_range[1] : 0xff;

	disp_name = NULL;
	if (device_is_compatible(dev, "u3-agp")) {
		setup_u3_agp(hose);
		disp_name = "U3-AGP";
		primary = 0;
	} else if (device_is_compatible(dev, "u3-ht")) {
		setup_u3_ht(hose);
		disp_name = "U3-HT";
		primary = 1;
        } else if (device_is_compatible(dev, "u4-pcie")) {
                setup_u4_pcie(hose);
                disp_name = "U4-PCIE";
                primary = 0;
	}
	printk(KERN_INFO "Found %s PCI host bridge. Firmware bus number: %d->%d\n",
		disp_name, hose->first_busno, hose->last_busno);

	/* Interpret the "ranges" property */
	/* This also maps the I/O region and sets isa_io/mem_base */
	pci_process_bridge_OF_ranges(hose, dev, primary);

	/* Fixup "bus-range" OF property */
	fixup_bus_range(dev);

	return 0;
}


void __init maple_pcibios_fixup(void)
{
	struct pci_dev *dev = NULL;

	DBG(" -> maple_pcibios_fixup\n");

	for_each_pci_dev(dev) {
		/* Fixup IRQ for PCIe host */
		if (u4_pcie != NULL && dev->bus->number == 0 &&
		    pci_bus_to_host(dev->bus) == u4_pcie) {
			printk(KERN_DEBUG "Fixup U4 PCIe IRQ\n");
			dev->irq = irq_create_mapping(NULL, 1);
			if (dev->irq != NO_IRQ)
				set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
			continue;
		}

		/* Hide AMD8111 IDE interrupt when in legacy mode so
		 * the driver calls pci_get_legacy_ide_irq()
		 */
		if (dev->vendor == PCI_VENDOR_ID_AMD &&
		    dev->device == PCI_DEVICE_ID_AMD_8111_IDE &&
		    (dev->class & 5) != 5) {
			dev->irq = NO_IRQ;
			continue;
		}

		/* For all others, map the interrupt from the device-tree */
		pci_read_irq_line(dev);
	}

	DBG(" <- maple_pcibios_fixup\n");
}

static void __init maple_fixup_phb_resources(void)
{
	struct pci_controller *hose, *tmp;
	
	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
		unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base;

		hose->io_resource.start += offset;
		hose->io_resource.end += offset;

		printk(KERN_INFO "PCI Host %d, io start: %llx; io end: %llx\n",
		       hose->global_number,
		       (unsigned long long)hose->io_resource.start,
		       (unsigned long long)hose->io_resource.end);
	}
}

void __init maple_pci_init(void)
{
	struct device_node *np, *root;
	struct device_node *ht = NULL;

	/* Probe root PCI hosts, that is on U3 the AGP host and the
	 * HyperTransport host. That one is actually "kept" around
	 * and actually added last as it's resource management relies
	 * on the AGP resources to have been setup first
	 */
	root = of_find_node_by_path("/");
	if (root == NULL) {
		printk(KERN_CRIT "maple_find_bridges: can't find root of device tree\n");
		return;
	}
	for (np = NULL; (np = of_get_next_child(root, np)) != NULL;) {
		if (np->name == NULL)
			continue;
		if (strcmp(np->name, "pci") == 0) {
			if (add_bridge(np) == 0)
				of_node_get(np);
		}
		if (strcmp(np->name, "ht") == 0) {
			of_node_get(np);
			ht = np;
		}
	}
	of_node_put(root);

	/* Now setup the HyperTransport host if we found any
	 */
	if (ht && add_bridge(ht) != 0)
		of_node_put(ht);

        /*
         * We need to call pci_setup_phb_io for the HT bridge first
         * so it gets the I/O port numbers starting at 0, and we
         * need to call it for the AGP bridge after that so it gets
         * small positive I/O port numbers.
         */
        if (u3_ht)
                pci_setup_phb_io(u3_ht, 1);
        if (u3_agp)
                pci_setup_phb_io(u3_agp, 0);
        if (u4_pcie)
                pci_setup_phb_io(u4_pcie, 0);

	/* Fixup the IO resources on our host bridges as the common code
	 * does it only for childs of the host bridges
	 */
	maple_fixup_phb_resources();

	/* Setup the linkage between OF nodes and PHBs */ 
	pci_devs_phb_init();

	/* Fixup the PCI<->OF mapping for U3 AGP due to bus renumbering. We
	 * assume there is no P2P bridge on the AGP bus, which should be a
	 * safe assumptions hopefully.
	 */
	if (u3_agp) {
		struct device_node *np = u3_agp->arch_data;
		PCI_DN(np)->busno = 0xf0;
		for (np = np->child; np; np = np->sibling)
			PCI_DN(np)->busno = 0xf0;
	}

	/* Tell pci.c to not change any resource allocations.  */
	pci_probe_only = 1;
}

int maple_pci_get_legacy_ide_irq(struct pci_dev *pdev, int channel)
{
	struct device_node *np;
	unsigned int defirq = channel ? 15 : 14;
	unsigned int irq;

	if (pdev->vendor != PCI_VENDOR_ID_AMD ||
	    pdev->device != PCI_DEVICE_ID_AMD_8111_IDE)
		return defirq;

	np = pci_device_to_OF_node(pdev);
	if (np == NULL) {
		printk("Failed to locate OF node for IDE %s\n",
		       pci_name(pdev));
		return defirq;
	}
	irq = irq_of_parse_and_map(np, channel & 0x1);
	if (irq == NO_IRQ) {
		printk("Failed to map onboard IDE interrupt for channel %d\n",
		       channel);
		return defirq;
	}
	return irq;
}

/* XXX: To remove once all firmwares are ok */
static void fixup_maple_ide(struct pci_dev* dev)
{
	if (!machine_is(maple))
		return;

#if 0 /* Enable this to enable IDE port 0 */
	{
		u8 v;

		pci_read_config_byte(dev, 0x40, &v);
		v |= 2;
		pci_write_config_byte(dev, 0x40, v);
	}
#endif
#if 0 /* fix bus master base */
	pci_write_config_dword(dev, 0x20, 0xcc01);
	printk("old ide resource: %lx -> %lx \n",
	       dev->resource[4].start, dev->resource[4].end);
	dev->resource[4].start = 0xcc00;
	dev->resource[4].end = 0xcc10;
#endif
#if 0 /* Enable this to fixup IDE sense/polarity of irqs in IO-APICs */
	{
		struct pci_dev *apicdev;
		u32 v;

		apicdev = pci_get_slot (dev->bus, PCI_DEVFN(5,0));
		if (apicdev == NULL)
			printk("IDE Fixup IRQ: Can't find IO-APIC !\n");
		else {
			pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*14);
			pci_read_config_dword(apicdev, 0xf4, &v);
			v &= ~0x00000022;
			pci_write_config_dword(apicdev, 0xf4, v);
			pci_write_config_byte(apicdev, 0xf2, 0x10 + 2*15);
			pci_read_config_dword(apicdev, 0xf4, &v);
			v &= ~0x00000022;
			pci_write_config_dword(apicdev, 0xf4, v);
			pci_dev_put(apicdev);
		}
	}
#endif
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_IDE,
			 fixup_maple_ide);
OpenPOWER on IntegriCloud