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[linux-2.6.9-moxart.git] / drivers / pci / quirks.c
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1 /*
2 * This file contains work-arounds for many known PCI hardware
3 * bugs. Devices present only on certain architectures (host
4 * bridges et cetera) should be handled in arch-specific code.
6 * Note: any quirks for hotpluggable devices must _NOT_ be declared __init.
8 * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
10 * The bridge optimization stuff has been removed. If you really
11 * have a silly BIOS which is unable to set your host bridge right,
12 * use the PowerTweak utility (see http://powertweak.sourceforge.net).
15 #include <linux/config.h>
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18 #include <linux/pci.h>
19 #include <linux/init.h>
20 #include <linux/delay.h>
22 #undef DEBUG
24 /* Deal with broken BIOS'es that neglect to enable passive release,
25 which can cause problems in combination with the 82441FX/PPro MTRRs */
26 static void __devinit quirk_passive_release(struct pci_dev *dev)
28 struct pci_dev *d = NULL;
29 unsigned char dlc;
31 /* We have to make sure a particular bit is set in the PIIX3
32 ISA bridge, so we have to go out and find it. */
33 while ((d = pci_find_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, d))) {
34 pci_read_config_byte(d, 0x82, &dlc);
35 if (!(dlc & 1<<1)) {
36 printk(KERN_ERR "PCI: PIIX3: Enabling Passive Release on %s\n", pci_name(d));
37 dlc |= 1<<1;
38 pci_write_config_byte(d, 0x82, dlc);
42 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release );
44 /* The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a workaround
45 but VIA don't answer queries. If you happen to have good contacts at VIA
46 ask them for me please -- Alan
48 This appears to be BIOS not version dependent. So presumably there is a
49 chipset level fix */
50 int isa_dma_bridge_buggy; /* Exported */
52 static void __devinit quirk_isa_dma_hangs(struct pci_dev *dev)
54 if (!isa_dma_bridge_buggy) {
55 isa_dma_bridge_buggy=1;
56 printk(KERN_INFO "Activating ISA DMA hang workarounds.\n");
60 * Its not totally clear which chipsets are the problematic ones
61 * We know 82C586 and 82C596 variants are affected.
63 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0, quirk_isa_dma_hangs );
64 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596, quirk_isa_dma_hangs );
65 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, quirk_isa_dma_hangs );
66 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, quirk_isa_dma_hangs );
67 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_1, quirk_isa_dma_hangs );
68 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_dma_hangs );
69 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs );
71 int pci_pci_problems;
74 * Chipsets where PCI->PCI transfers vanish or hang
76 static void __devinit quirk_nopcipci(struct pci_dev *dev)
78 if ((pci_pci_problems & PCIPCI_FAIL)==0) {
79 printk(KERN_INFO "Disabling direct PCI/PCI transfers.\n");
80 pci_pci_problems |= PCIPCI_FAIL;
83 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, quirk_nopcipci );
84 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_496, quirk_nopcipci );
87 * Triton requires workarounds to be used by the drivers
89 static void __devinit quirk_triton(struct pci_dev *dev)
91 if ((pci_pci_problems&PCIPCI_TRITON)==0) {
92 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
93 pci_pci_problems |= PCIPCI_TRITON;
96 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437, quirk_triton );
97 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437VX, quirk_triton );
98 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82439, quirk_triton );
99 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82439TX, quirk_triton );
102 * VIA Apollo KT133 needs PCI latency patch
103 * Made according to a windows driver based patch by George E. Breese
104 * see PCI Latency Adjust on http://www.viahardware.com/download/viatweak.shtm
105 * Also see http://www.au-ja.org/review-kt133a-1-en.phtml for
106 * the info on which Mr Breese based his work.
108 * Updated based on further information from the site and also on
109 * information provided by VIA
111 static void __devinit quirk_vialatency(struct pci_dev *dev)
113 struct pci_dev *p;
114 u8 rev;
115 u8 busarb;
116 /* Ok we have a potential problem chipset here. Now see if we have
117 a buggy southbridge */
119 p = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, NULL);
120 if (p!=NULL) {
121 pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
122 /* 0x40 - 0x4f == 686B, 0x10 - 0x2f == 686A; thanks Dan Hollis */
123 /* Check for buggy part revisions */
124 if (rev < 0x40 || rev > 0x42)
125 return;
126 } else {
127 p = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
128 if (p==NULL) /* No problem parts */
129 return;
130 pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
131 /* Check for buggy part revisions */
132 if (rev < 0x10 || rev > 0x12)
133 return;
137 * Ok we have the problem. Now set the PCI master grant to
138 * occur every master grant. The apparent bug is that under high
139 * PCI load (quite common in Linux of course) you can get data
140 * loss when the CPU is held off the bus for 3 bus master requests
141 * This happens to include the IDE controllers....
143 * VIA only apply this fix when an SB Live! is present but under
144 * both Linux and Windows this isnt enough, and we have seen
145 * corruption without SB Live! but with things like 3 UDMA IDE
146 * controllers. So we ignore that bit of the VIA recommendation..
149 pci_read_config_byte(dev, 0x76, &busarb);
150 /* Set bit 4 and bi 5 of byte 76 to 0x01
151 "Master priority rotation on every PCI master grant */
152 busarb &= ~(1<<5);
153 busarb |= (1<<4);
154 pci_write_config_byte(dev, 0x76, busarb);
155 printk(KERN_INFO "Applying VIA southbridge workaround.\n");
157 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vialatency );
158 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_1, quirk_vialatency );
159 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, quirk_vialatency );
162 * VIA Apollo VP3 needs ETBF on BT848/878
164 static void __devinit quirk_viaetbf(struct pci_dev *dev)
166 if ((pci_pci_problems&PCIPCI_VIAETBF)==0) {
167 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
168 pci_pci_problems |= PCIPCI_VIAETBF;
171 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_viaetbf );
173 static void __devinit quirk_vsfx(struct pci_dev *dev)
175 if ((pci_pci_problems&PCIPCI_VSFX)==0) {
176 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
177 pci_pci_problems |= PCIPCI_VSFX;
180 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576, quirk_vsfx );
183 * Ali Magik requires workarounds to be used by the drivers
184 * that DMA to AGP space. Latency must be set to 0xA and triton
185 * workaround applied too
186 * [Info kindly provided by ALi]
188 static void __init quirk_alimagik(struct pci_dev *dev)
190 if ((pci_pci_problems&PCIPCI_ALIMAGIK)==0) {
191 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
192 pci_pci_problems |= PCIPCI_ALIMAGIK|PCIPCI_TRITON;
195 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1647, quirk_alimagik );
196 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1651, quirk_alimagik );
199 * Natoma has some interesting boundary conditions with Zoran stuff
200 * at least
202 static void __devinit quirk_natoma(struct pci_dev *dev)
204 if ((pci_pci_problems&PCIPCI_NATOMA)==0) {
205 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
206 pci_pci_problems |= PCIPCI_NATOMA;
209 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_natoma );
210 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443LX_0, quirk_natoma );
211 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443LX_1, quirk_natoma );
212 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_0, quirk_natoma );
213 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_1, quirk_natoma );
214 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_2, quirk_natoma );
217 * S3 868 and 968 chips report region size equal to 32M, but they decode 64M.
218 * If it's needed, re-allocate the region.
220 static void __devinit quirk_s3_64M(struct pci_dev *dev)
222 struct resource *r = &dev->resource[0];
224 if ((r->start & 0x3ffffff) || r->end != r->start + 0x3ffffff) {
225 r->start = 0;
226 r->end = 0x3ffffff;
229 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_868, quirk_s3_64M );
230 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_968, quirk_s3_64M );
232 static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region, unsigned size, int nr)
234 region &= ~(size-1);
235 if (region) {
236 struct resource *res = dev->resource + nr;
238 res->name = pci_name(dev);
239 res->start = region;
240 res->end = region + size - 1;
241 res->flags = IORESOURCE_IO;
242 pci_claim_resource(dev, nr);
247 * ATI Northbridge setups MCE the processor if you even
248 * read somewhere between 0x3b0->0x3bb or read 0x3d3
250 static void __devinit quirk_ati_exploding_mce(struct pci_dev *dev)
252 printk(KERN_INFO "ATI Northbridge, reserving I/O ports 0x3b0 to 0x3bb.\n");
253 /* Mae rhaid i ni beidio ag edrych ar y lleoliadiau I/O hyn */
254 request_region(0x3b0, 0x0C, "RadeonIGP");
255 request_region(0x3d3, 0x01, "RadeonIGP");
257 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, quirk_ati_exploding_mce );
260 * Let's make the southbridge information explicit instead
261 * of having to worry about people probing the ACPI areas,
262 * for example.. (Yes, it happens, and if you read the wrong
263 * ACPI register it will put the machine to sleep with no
264 * way of waking it up again. Bummer).
266 * ALI M7101: Two IO regions pointed to by words at
267 * 0xE0 (64 bytes of ACPI registers)
268 * 0xE2 (32 bytes of SMB registers)
270 static void __devinit quirk_ali7101_acpi(struct pci_dev *dev)
272 u16 region;
274 pci_read_config_word(dev, 0xE0, &region);
275 quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES);
276 pci_read_config_word(dev, 0xE2, &region);
277 quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1);
279 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, quirk_ali7101_acpi );
282 * PIIX4 ACPI: Two IO regions pointed to by longwords at
283 * 0x40 (64 bytes of ACPI registers)
284 * 0x90 (32 bytes of SMB registers)
286 static void __devinit quirk_piix4_acpi(struct pci_dev *dev)
288 u32 region;
290 pci_read_config_dword(dev, 0x40, &region);
291 quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES);
292 pci_read_config_dword(dev, 0x90, &region);
293 quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1);
295 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, quirk_piix4_acpi );
298 * ICH4, ICH4-M, ICH5, ICH5-M ACPI: Three IO regions pointed to by longwords at
299 * 0x40 (128 bytes of ACPI, GPIO & TCO registers)
300 * 0x58 (64 bytes of GPIO I/O space)
302 static void __devinit quirk_ich4_lpc_acpi(struct pci_dev *dev)
304 u32 region;
306 pci_read_config_dword(dev, 0x40, &region);
307 quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES);
309 pci_read_config_dword(dev, 0x58, &region);
310 quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES+1);
312 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, quirk_ich4_lpc_acpi );
313 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0, quirk_ich4_lpc_acpi );
314 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, quirk_ich4_lpc_acpi );
315 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_10, quirk_ich4_lpc_acpi );
316 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, quirk_ich4_lpc_acpi );
317 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, quirk_ich4_lpc_acpi );
318 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, quirk_ich4_lpc_acpi );
319 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, quirk_ich4_lpc_acpi );
320 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, quirk_ich4_lpc_acpi );
323 * VIA ACPI: One IO region pointed to by longword at
324 * 0x48 or 0x20 (256 bytes of ACPI registers)
326 static void __devinit quirk_vt82c586_acpi(struct pci_dev *dev)
328 u8 rev;
329 u32 region;
331 pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
332 if (rev & 0x10) {
333 pci_read_config_dword(dev, 0x48, &region);
334 region &= PCI_BASE_ADDRESS_IO_MASK;
335 quirk_io_region(dev, region, 256, PCI_BRIDGE_RESOURCES);
338 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_vt82c586_acpi );
341 * VIA VT82C686 ACPI: Three IO region pointed to by (long)words at
342 * 0x48 (256 bytes of ACPI registers)
343 * 0x70 (128 bytes of hardware monitoring register)
344 * 0x90 (16 bytes of SMB registers)
346 static void __devinit quirk_vt82c686_acpi(struct pci_dev *dev)
348 u16 hm;
349 u32 smb;
351 quirk_vt82c586_acpi(dev);
353 pci_read_config_word(dev, 0x70, &hm);
354 hm &= PCI_BASE_ADDRESS_IO_MASK;
355 quirk_io_region(dev, hm, 128, PCI_BRIDGE_RESOURCES + 1);
357 pci_read_config_dword(dev, 0x90, &smb);
358 smb &= PCI_BASE_ADDRESS_IO_MASK;
359 quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 2);
361 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_vt82c686_acpi );
364 #ifdef CONFIG_X86_IO_APIC
366 #include <asm/io_apic.h>
369 * VIA 686A/B: If an IO-APIC is active, we need to route all on-chip
370 * devices to the external APIC.
372 * TODO: When we have device-specific interrupt routers,
373 * this code will go away from quirks.
375 static void __devinit quirk_via_ioapic(struct pci_dev *dev)
377 u8 tmp;
379 if (nr_ioapics < 1)
380 tmp = 0; /* nothing routed to external APIC */
381 else
382 tmp = 0x1f; /* all known bits (4-0) routed to external APIC */
384 printk(KERN_INFO "PCI: %sbling Via external APIC routing\n",
385 tmp == 0 ? "Disa" : "Ena");
387 /* Offset 0x58: External APIC IRQ output control */
388 pci_write_config_byte (dev, 0x58, tmp);
390 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, quirk_via_ioapic );
393 * The AMD io apic can hang the box when an apic irq is masked.
394 * We check all revs >= B0 (yet not in the pre production!) as the bug
395 * is currently marked NoFix
397 * We have multiple reports of hangs with this chipset that went away with
398 * noapic specified. For the moment we assume its the errata. We may be wrong
399 * of course. However the advice is demonstrably good even if so..
401 static void __devinit quirk_amd_ioapic(struct pci_dev *dev)
403 u8 rev;
405 pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
406 if (rev >= 0x02) {
407 printk(KERN_WARNING "I/O APIC: AMD Errata #22 may be present. In the event of instability try\n");
408 printk(KERN_WARNING " : booting with the \"noapic\" option.\n");
411 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, quirk_amd_ioapic );
413 static void __init quirk_ioapic_rmw(struct pci_dev *dev)
415 if (dev->devfn == 0 && dev->bus->number == 0)
416 sis_apic_bug = 1;
418 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_ANY_ID, quirk_ioapic_rmw );
420 #define AMD8131_revA0 0x01
421 #define AMD8131_revB0 0x11
422 #define AMD8131_MISC 0x40
423 #define AMD8131_NIOAMODE_BIT 0
424 static void __init quirk_amd_8131_ioapic(struct pci_dev *dev)
426 unsigned char revid, tmp;
428 if (nr_ioapics == 0)
429 return;
431 pci_read_config_byte(dev, PCI_REVISION_ID, &revid);
432 if (revid == AMD8131_revA0 || revid == AMD8131_revB0) {
433 printk(KERN_INFO "Fixing up AMD8131 IOAPIC mode\n");
434 pci_read_config_byte( dev, AMD8131_MISC, &tmp);
435 tmp &= ~(1 << AMD8131_NIOAMODE_BIT);
436 pci_write_config_byte( dev, AMD8131_MISC, tmp);
439 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_APIC, quirk_amd_8131_ioapic );
441 #endif /* CONFIG_X86_IO_APIC */
445 * Via 686A/B: The PCI_INTERRUPT_LINE register for the on-chip
446 * devices, USB0/1, AC97, MC97, and ACPI, has an unusual feature:
447 * when written, it makes an internal connection to the PIC.
448 * For these devices, this register is defined to be 4 bits wide.
449 * Normally this is fine. However for IO-APIC motherboards, or
450 * non-x86 architectures (yes Via exists on PPC among other places),
451 * we must mask the PCI_INTERRUPT_LINE value versus 0xf to get
452 * interrupts delivered properly.
454 * TODO: When we have device-specific interrupt routers,
455 * quirk_via_irqpic will go away from quirks.
459 * FIXME: it is questionable that quirk_via_acpi
460 * is needed. It shows up as an ISA bridge, and does not
461 * support the PCI_INTERRUPT_LINE register at all. Therefore
462 * it seems like setting the pci_dev's 'irq' to the
463 * value of the ACPI SCI interrupt is only done for convenience.
464 * -jgarzik
466 static void __devinit quirk_via_acpi(struct pci_dev *d)
469 * VIA ACPI device: SCI IRQ line in PCI config byte 0x42
471 u8 irq;
472 pci_read_config_byte(d, 0x42, &irq);
473 irq &= 0xf;
474 if (irq && (irq != 2))
475 d->irq = irq;
477 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_via_acpi );
478 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_via_acpi );
480 static void __devinit quirk_via_irqpic(struct pci_dev *dev)
482 u8 irq, new_irq = dev->irq & 0xf;
484 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
486 if (new_irq != irq) {
487 printk(KERN_INFO "PCI: Via IRQ fixup for %s, from %d to %d\n",
488 pci_name(dev), irq, new_irq);
490 udelay(15);
491 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, new_irq);
494 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2, quirk_via_irqpic );
495 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5, quirk_via_irqpic );
496 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_6, quirk_via_irqpic );
500 * PIIX3 USB: We have to disable USB interrupts that are
501 * hardwired to PIRQD# and may be shared with an
502 * external device.
504 * Legacy Support Register (LEGSUP):
505 * bit13: USB PIRQ Enable (USBPIRQDEN),
506 * bit4: Trap/SMI On IRQ Enable (USBSMIEN).
508 * We mask out all r/wc bits, too.
510 static void __devinit quirk_piix3_usb(struct pci_dev *dev)
512 u16 legsup;
514 pci_read_config_word(dev, 0xc0, &legsup);
515 legsup &= 0x50ef;
516 pci_write_config_word(dev, 0xc0, legsup);
518 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_2, quirk_piix3_usb );
519 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_2, quirk_piix3_usb );
522 * VIA VT82C598 has its device ID settable and many BIOSes
523 * set it to the ID of VT82C597 for backward compatibility.
524 * We need to switch it off to be able to recognize the real
525 * type of the chip.
527 static void __devinit quirk_vt82c598_id(struct pci_dev *dev)
529 pci_write_config_byte(dev, 0xfc, 0);
530 pci_read_config_word(dev, PCI_DEVICE_ID, &dev->device);
532 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_vt82c598_id );
535 * CardBus controllers have a legacy base address that enables them
536 * to respond as i82365 pcmcia controllers. We don't want them to
537 * do this even if the Linux CardBus driver is not loaded, because
538 * the Linux i82365 driver does not (and should not) handle CardBus.
540 static void __devinit quirk_cardbus_legacy(struct pci_dev *dev)
542 if ((PCI_CLASS_BRIDGE_CARDBUS << 8) ^ dev->class)
543 return;
544 pci_write_config_dword(dev, PCI_CB_LEGACY_MODE_BASE, 0);
546 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_cardbus_legacy );
549 * Following the PCI ordering rules is optional on the AMD762. I'm not
550 * sure what the designers were smoking but let's not inhale...
552 * To be fair to AMD, it follows the spec by default, its BIOS people
553 * who turn it off!
555 static void __devinit quirk_amd_ordering(struct pci_dev *dev)
557 u32 pcic;
558 pci_read_config_dword(dev, 0x4C, &pcic);
559 if ((pcic&6)!=6) {
560 pcic |= 6;
561 printk(KERN_WARNING "BIOS failed to enable PCI standards compliance, fixing this error.\n");
562 pci_write_config_dword(dev, 0x4C, pcic);
563 pci_read_config_dword(dev, 0x84, &pcic);
564 pcic |= (1<<23); /* Required in this mode */
565 pci_write_config_dword(dev, 0x84, pcic);
568 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering );
571 * DreamWorks provided workaround for Dunord I-3000 problem
573 * This card decodes and responds to addresses not apparently
574 * assigned to it. We force a larger allocation to ensure that
575 * nothing gets put too close to it.
577 static void __devinit quirk_dunord ( struct pci_dev * dev )
579 struct resource *r = &dev->resource [1];
580 r->start = 0;
581 r->end = 0xffffff;
583 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DUNORD, PCI_DEVICE_ID_DUNORD_I3000, quirk_dunord );
586 * i82380FB mobile docking controller: its PCI-to-PCI bridge
587 * is subtractive decoding (transparent), and does indicate this
588 * in the ProgIf. Unfortunately, the ProgIf value is wrong - 0x80
589 * instead of 0x01.
591 static void __devinit quirk_transparent_bridge(struct pci_dev *dev)
593 dev->transparent = 1;
595 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82380FB, quirk_transparent_bridge );
596 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA, 0x605, quirk_transparent_bridge );
599 * Common misconfiguration of the MediaGX/Geode PCI master that will
600 * reduce PCI bandwidth from 70MB/s to 25MB/s. See the GXM/GXLV/GX1
601 * datasheets found at http://www.national.com/ds/GX for info on what
602 * these bits do. <christer@weinigel.se>
604 static void __init quirk_mediagx_master(struct pci_dev *dev)
606 u8 reg;
607 pci_read_config_byte(dev, 0x41, &reg);
608 if (reg & 2) {
609 reg &= ~2;
610 printk(KERN_INFO "PCI: Fixup for MediaGX/Geode Slave Disconnect Boundary (0x41=0x%02x)\n", reg);
611 pci_write_config_byte(dev, 0x41, reg);
614 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master );
617 * As per PCI spec, ignore base address registers 0-3 of the IDE controllers
618 * running in Compatible mode (bits 0 and 2 in the ProgIf for primary and
619 * secondary channels respectively). If the device reports Compatible mode
620 * but does use BAR0-3 for address decoding, we assume that firmware has
621 * programmed these BARs with standard values (0x1f0,0x3f4 and 0x170,0x374).
622 * Exceptions (if they exist) must be handled in chip/architecture specific
623 * fixups.
625 * Note: for non x86 people. You may need an arch specific quirk to handle
626 * moving IDE devices to native mode as well. Some plug in card devices power
627 * up in compatible mode and assume the BIOS will adjust them.
629 * Q: should we load the 0x1f0,0x3f4 into the registers or zap them as
630 * we do now ? We don't want is pci_enable_device to come along
631 * and assign new resources. Both approaches work for that.
633 static void __devinit quirk_ide_bases(struct pci_dev *dev)
635 struct resource *res;
636 int first_bar = 2, last_bar = 0;
638 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
639 return;
641 res = &dev->resource[0];
643 /* primary channel: ProgIf bit 0, BAR0, BAR1 */
644 if (!(dev->class & 1) && (res[0].flags || res[1].flags)) {
645 res[0].start = res[0].end = res[0].flags = 0;
646 res[1].start = res[1].end = res[1].flags = 0;
647 first_bar = 0;
648 last_bar = 1;
651 /* secondary channel: ProgIf bit 2, BAR2, BAR3 */
652 if (!(dev->class & 4) && (res[2].flags || res[3].flags)) {
653 res[2].start = res[2].end = res[2].flags = 0;
654 res[3].start = res[3].end = res[3].flags = 0;
655 last_bar = 3;
658 if (!last_bar)
659 return;
661 printk(KERN_INFO "PCI: Ignoring BAR%d-%d of IDE controller %s\n",
662 first_bar, last_bar, pci_name(dev));
664 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_ide_bases );
667 * Ensure C0 rev restreaming is off. This is normally done by
668 * the BIOS but in the odd case it is not the results are corruption
669 * hence the presence of a Linux check
671 static void __init quirk_disable_pxb(struct pci_dev *pdev)
673 u16 config;
674 u8 rev;
676 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
677 if (rev != 0x04) /* Only C0 requires this */
678 return;
679 pci_read_config_word(pdev, 0x40, &config);
680 if (config & (1<<6)) {
681 config &= ~(1<<6);
682 pci_write_config_word(pdev, 0x40, config);
683 printk(KERN_INFO "PCI: C0 revision 450NX. Disabling PCI restreaming.\n");
686 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, quirk_disable_pxb );
689 * VIA northbridges care about PCI_INTERRUPT_LINE
691 int interrupt_line_quirk;
693 static void __devinit quirk_via_bridge(struct pci_dev *pdev)
695 if(pdev->devfn == 0)
696 interrupt_line_quirk = 1;
698 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_bridge );
701 * Serverworks CSB5 IDE does not fully support native mode
703 static void __init quirk_svwks_csb5ide(struct pci_dev *pdev)
705 u8 prog;
706 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
707 if (prog & 5) {
708 prog &= ~5;
709 pdev->class &= ~5;
710 pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
711 /* need to re-assign BARs for compat mode */
712 quirk_ide_bases(pdev);
715 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide );
717 /* This was originally an Alpha specific thing, but it really fits here.
718 * The i82375 PCI/EISA bridge appears as non-classified. Fix that.
720 static void __init quirk_eisa_bridge(struct pci_dev *dev)
722 dev->class = PCI_CLASS_BRIDGE_EISA << 8;
724 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82375, quirk_eisa_bridge );
727 * On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
728 * is not activated. The myth is that Asus said that they do not want the
729 * users to be irritated by just another PCI Device in the Win98 device
730 * manager. (see the file prog/hotplug/README.p4b in the lm_sensors
731 * package 2.7.0 for details)
733 * The SMBus PCI Device can be activated by setting a bit in the ICH LPC
734 * bridge. Unfortunately, this device has no subvendor/subdevice ID. So it
735 * becomes necessary to do this tweak in two steps -- I've chosen the Host
736 * bridge as trigger.
738 static int __initdata asus_hides_smbus = 0;
740 static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev)
742 if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
743 if (dev->device == PCI_DEVICE_ID_INTEL_82845_HB)
744 switch(dev->subsystem_device) {
745 case 0x8070: /* P4B */
746 case 0x8088: /* P4B533 */
747 case 0x1626: /* L3C notebook */
748 asus_hides_smbus = 1;
750 if (dev->device == PCI_DEVICE_ID_INTEL_82845G_HB)
751 switch(dev->subsystem_device) {
752 case 0x80b1: /* P4GE-V */
753 case 0x80b2: /* P4PE */
754 case 0x8093: /* P4B533-V */
755 asus_hides_smbus = 1;
757 if (dev->device == PCI_DEVICE_ID_INTEL_82850_HB)
758 switch(dev->subsystem_device) {
759 case 0x8030: /* P4T533 */
760 asus_hides_smbus = 1;
762 if (dev->device == PCI_DEVICE_ID_INTEL_7205_0)
763 switch (dev->subsystem_device) {
764 case 0x8070: /* P4G8X Deluxe */
765 asus_hides_smbus = 1;
767 if (dev->device == PCI_DEVICE_ID_INTEL_82855GM_HB)
768 switch (dev->subsystem_device) {
769 case 0x1751: /* M2N notebook */
770 asus_hides_smbus = 1;
772 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
773 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
774 switch(dev->subsystem_device) {
775 case 0x088C: /* HP Compaq nc8000 */
776 case 0x0890: /* HP Compaq nc6000 */
777 asus_hides_smbus = 1;
779 if (dev->device == PCI_DEVICE_ID_INTEL_82865_HB)
780 switch (dev->subsystem_device) {
781 case 0x12bc: /* HP D330L */
782 asus_hides_smbus = 1;
786 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845_HB, asus_hides_smbus_hostbridge );
787 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845G_HB, asus_hides_smbus_hostbridge );
788 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82850_HB, asus_hides_smbus_hostbridge );
789 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82865_HB, asus_hides_smbus_hostbridge );
790 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_7205_0, asus_hides_smbus_hostbridge );
791 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855PM_HB, asus_hides_smbus_hostbridge );
792 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855GM_HB, asus_hides_smbus_hostbridge );
794 static void __init asus_hides_smbus_lpc(struct pci_dev *dev)
796 u16 val;
798 if (likely(!asus_hides_smbus))
799 return;
801 pci_read_config_word(dev, 0xF2, &val);
802 if (val & 0x8) {
803 pci_write_config_word(dev, 0xF2, val & (~0x8));
804 pci_read_config_word(dev, 0xF2, &val);
805 if (val & 0x8)
806 printk(KERN_INFO "PCI: i801 SMBus device continues to play 'hide and seek'! 0x%x\n", val);
807 else
808 printk(KERN_INFO "PCI: Enabled i801 SMBus device\n");
811 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, asus_hides_smbus_lpc );
812 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, asus_hides_smbus_lpc );
813 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, asus_hides_smbus_lpc );
814 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, asus_hides_smbus_lpc );
815 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, asus_hides_smbus_lpc );
818 * SiS 96x south bridge: BIOS typically hides SMBus device...
820 static void __init quirk_sis_96x_smbus(struct pci_dev *dev)
822 u8 val = 0;
823 printk(KERN_INFO "Enabling SiS 96x SMBus.\n");
824 pci_read_config_byte(dev, 0x77, &val);
825 pci_write_config_byte(dev, 0x77, val & ~0x10);
826 pci_read_config_byte(dev, 0x77, &val);
830 * ... This is further complicated by the fact that some SiS96x south
831 * bridges pretend to be 85C503/5513 instead. In that case see if we
832 * spotted a compatible north bridge to make sure.
833 * (pci_find_device doesn't work yet)
835 * We can also enable the sis96x bit in the discovery register..
837 static int __devinitdata sis_96x_compatible = 0;
839 #define SIS_DETECT_REGISTER 0x40
841 static void __init quirk_sis_503(struct pci_dev *dev)
843 u8 reg;
844 u16 devid;
846 pci_read_config_byte(dev, SIS_DETECT_REGISTER, &reg);
847 pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg | (1 << 6));
848 pci_read_config_word(dev, PCI_DEVICE_ID, &devid);
849 if (((devid & 0xfff0) != 0x0960) && (devid != 0x0018)) {
850 pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg);
851 return;
854 /* Make people aware that we changed the config.. */
855 printk(KERN_WARNING "Uncovering SIS%x that hid as a SIS503 (compatible=%d)\n", devid, sis_96x_compatible);
858 * Ok, it now shows up as a 96x.. The 96x quirks are after
859 * the 503 quirk in the quirk table, so they'll automatically
860 * run and enable things like the SMBus device
862 dev->device = devid;
865 static void __init quirk_sis_96x_compatible(struct pci_dev *dev)
867 sis_96x_compatible = 1;
869 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_645, quirk_sis_96x_compatible );
870 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_646, quirk_sis_96x_compatible );
871 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_648, quirk_sis_96x_compatible );
872 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_650, quirk_sis_96x_compatible );
873 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_651, quirk_sis_96x_compatible );
874 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_735, quirk_sis_96x_compatible );
876 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503 );
878 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_961, quirk_sis_96x_smbus );
879 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_962, quirk_sis_96x_smbus );
880 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_963, quirk_sis_96x_smbus );
881 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC, quirk_sis_96x_smbus );
883 #ifdef CONFIG_X86_IO_APIC
884 static void __init quirk_alder_ioapic(struct pci_dev *pdev)
886 int i;
888 if ((pdev->class >> 8) != 0xff00)
889 return;
891 /* the first BAR is the location of the IO APIC...we must
892 * not touch this (and it's already covered by the fixmap), so
893 * forcibly insert it into the resource tree */
894 if (pci_resource_start(pdev, 0) && pci_resource_len(pdev, 0))
895 insert_resource(&iomem_resource, &pdev->resource[0]);
897 /* The next five BARs all seem to be rubbish, so just clean
898 * them out */
899 for (i=1; i < 6; i++) {
900 memset(&pdev->resource[i], 0, sizeof(pdev->resource[i]));
904 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_alder_ioapic );
905 #endif
907 #ifdef CONFIG_SCSI_SATA
908 static void __init quirk_intel_ide_combined(struct pci_dev *pdev)
910 u8 prog, comb, tmp;
911 int ich = 0;
914 * Narrow down to Intel SATA PCI devices.
916 switch (pdev->device) {
917 /* PCI ids taken from drivers/scsi/ata_piix.c */
918 case 0x24d1:
919 case 0x24df:
920 case 0x25a3:
921 case 0x25b0:
922 ich = 5;
923 break;
924 case 0x2651:
925 case 0x2652:
926 case 0x2653:
927 ich = 6;
928 break;
929 default:
930 /* we do not handle this PCI device */
931 return;
935 * Read combined mode register.
937 pci_read_config_byte(pdev, 0x90, &tmp); /* combined mode reg */
939 if (ich == 5) {
940 tmp &= 0x6; /* interesting bits 2:1, PATA primary/secondary */
941 if (tmp == 0x4) /* bits 10x */
942 comb = (1 << 0); /* SATA port 0, PATA port 1 */
943 else if (tmp == 0x6) /* bits 11x */
944 comb = (1 << 2); /* PATA port 0, SATA port 1 */
945 else
946 return; /* not in combined mode */
947 } else {
948 WARN_ON(ich != 6);
949 tmp &= 0x3; /* interesting bits 1:0 */
950 if (tmp & (1 << 0))
951 comb = (1 << 2); /* PATA port 0, SATA port 1 */
952 else if (tmp & (1 << 1))
953 comb = (1 << 0); /* SATA port 0, PATA port 1 */
954 else
955 return; /* not in combined mode */
959 * Read programming interface register.
960 * (Tells us if it's legacy or native mode)
962 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
964 /* if SATA port is in native mode, we're ok. */
965 if (prog & comb)
966 return;
968 /* SATA port is in legacy mode. Reserve port so that
969 * IDE driver does not attempt to use it. If request_region
970 * fails, it will be obvious at boot time, so we don't bother
971 * checking return values.
973 if (comb == (1 << 0))
974 request_region(0x1f0, 8, "libata"); /* port 0 */
975 else
976 request_region(0x170, 8, "libata"); /* port 1 */
978 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, quirk_intel_ide_combined );
979 #endif /* CONFIG_SCSI_SATA */
981 int pciehp_msi_quirk;
983 static void __devinit quirk_pciehp_msi(struct pci_dev *pdev)
985 pciehp_msi_quirk = 1;
987 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SMCH, quirk_pciehp_msi );
990 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end)
992 while (f < end) {
993 if ((f->vendor == dev->vendor || f->vendor == (u16) PCI_ANY_ID) &&
994 (f->device == dev->device || f->device == (u16) PCI_ANY_ID)) {
995 pr_debug(KERN_INFO "PCI: Calling quirk %p for %s\n", f->hook, pci_name(dev));
996 f->hook(dev);
998 f++;
1002 extern struct pci_fixup __start_pci_fixups_header[];
1003 extern struct pci_fixup __end_pci_fixups_header[];
1004 extern struct pci_fixup __start_pci_fixups_final[];
1005 extern struct pci_fixup __end_pci_fixups_final[];
1007 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
1009 struct pci_fixup *start, *end;
1011 switch(pass) {
1012 case pci_fixup_header:
1013 start = __start_pci_fixups_header;
1014 end = __end_pci_fixups_header;
1015 break;
1017 case pci_fixup_final:
1018 start = __start_pci_fixups_final;
1019 end = __end_pci_fixups_final;
1020 break;
1021 default:
1022 /* stupid compiler warning, you would think with an enum... */
1023 return;
1025 pci_do_fixups(dev, start, end);
1028 EXPORT_SYMBOL(pciehp_msi_quirk);