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 * Init/reset quirks for USB host controllers should be in the
11 * USB quirks file, where their drivers can access reuse it.
13 * The bridge optimization stuff has been removed. If you really
14 * have a silly BIOS which is unable to set your host bridge right,
15 * use the PowerTweak utility (see http://powertweak.sourceforge.net).
18 #include <linux/config.h>
19 #include <linux/types.h>
20 #include <linux/kernel.h>
21 #include <linux/pci.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
24 #include <linux/acpi.h>
27 /* Deal with broken BIOS'es that neglect to enable passive release,
28 which can cause problems in combination with the 82441FX/PPro MTRRs */
29 static void __devinit quirk_passive_release(struct pci_dev *dev)
31 struct pci_dev *d = NULL;
34 /* We have to make sure a particular bit is set in the PIIX3
35 ISA bridge, so we have to go out and find it. */
36 while ((d = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, d))) {
37 pci_read_config_byte(d, 0x82, &dlc);
39 printk(KERN_ERR "PCI: PIIX3: Enabling Passive Release on %s\n", pci_name(d));
41 pci_write_config_byte(d, 0x82, dlc);
45 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release );
47 /* The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a workaround
48 but VIA don't answer queries. If you happen to have good contacts at VIA
49 ask them for me please -- Alan
51 This appears to be BIOS not version dependent. So presumably there is a
53 int isa_dma_bridge_buggy; /* Exported */
55 static void __devinit quirk_isa_dma_hangs(struct pci_dev *dev)
57 if (!isa_dma_bridge_buggy) {
58 isa_dma_bridge_buggy=1;
59 printk(KERN_INFO "Activating ISA DMA hang workarounds.\n");
63 * Its not totally clear which chipsets are the problematic ones
64 * We know 82C586 and 82C596 variants are affected.
66 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0, quirk_isa_dma_hangs );
67 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596, quirk_isa_dma_hangs );
68 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, quirk_isa_dma_hangs );
69 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, quirk_isa_dma_hangs );
70 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_1, quirk_isa_dma_hangs );
71 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_dma_hangs );
72 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs );
77 * Chipsets where PCI->PCI transfers vanish or hang
79 static void __devinit quirk_nopcipci(struct pci_dev *dev)
81 if ((pci_pci_problems & PCIPCI_FAIL)==0) {
82 printk(KERN_INFO "Disabling direct PCI/PCI transfers.\n");
83 pci_pci_problems |= PCIPCI_FAIL;
86 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, quirk_nopcipci );
87 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_496, quirk_nopcipci );
90 * Triton requires workarounds to be used by the drivers
92 static void __devinit quirk_triton(struct pci_dev *dev)
94 if ((pci_pci_problems&PCIPCI_TRITON)==0) {
95 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
96 pci_pci_problems |= PCIPCI_TRITON;
99 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437, quirk_triton );
100 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437VX, quirk_triton );
101 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82439, quirk_triton );
102 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82439TX, quirk_triton );
105 * VIA Apollo KT133 needs PCI latency patch
106 * Made according to a windows driver based patch by George E. Breese
107 * see PCI Latency Adjust on http://www.viahardware.com/download/viatweak.shtm
108 * Also see http://www.au-ja.org/review-kt133a-1-en.phtml for
109 * the info on which Mr Breese based his work.
111 * Updated based on further information from the site and also on
112 * information provided by VIA
114 static void __devinit quirk_vialatency(struct pci_dev *dev)
119 /* Ok we have a potential problem chipset here. Now see if we have
120 a buggy southbridge */
122 p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, NULL);
124 pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
125 /* 0x40 - 0x4f == 686B, 0x10 - 0x2f == 686A; thanks Dan Hollis */
126 /* Check for buggy part revisions */
127 if (rev < 0x40 || rev > 0x42)
130 p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
131 if (p==NULL) /* No problem parts */
133 pci_read_config_byte(p, PCI_CLASS_REVISION, &rev);
134 /* Check for buggy part revisions */
135 if (rev < 0x10 || rev > 0x12)
140 * Ok we have the problem. Now set the PCI master grant to
141 * occur every master grant. The apparent bug is that under high
142 * PCI load (quite common in Linux of course) you can get data
143 * loss when the CPU is held off the bus for 3 bus master requests
144 * This happens to include the IDE controllers....
146 * VIA only apply this fix when an SB Live! is present but under
147 * both Linux and Windows this isnt enough, and we have seen
148 * corruption without SB Live! but with things like 3 UDMA IDE
149 * controllers. So we ignore that bit of the VIA recommendation..
152 pci_read_config_byte(dev, 0x76, &busarb);
153 /* Set bit 4 and bi 5 of byte 76 to 0x01
154 "Master priority rotation on every PCI master grant */
157 pci_write_config_byte(dev, 0x76, busarb);
158 printk(KERN_INFO "Applying VIA southbridge workaround.\n");
162 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vialatency );
163 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_1, quirk_vialatency );
164 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, quirk_vialatency );
167 * VIA Apollo VP3 needs ETBF on BT848/878
169 static void __devinit quirk_viaetbf(struct pci_dev *dev)
171 if ((pci_pci_problems&PCIPCI_VIAETBF)==0) {
172 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
173 pci_pci_problems |= PCIPCI_VIAETBF;
176 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_viaetbf );
178 static void __devinit quirk_vsfx(struct pci_dev *dev)
180 if ((pci_pci_problems&PCIPCI_VSFX)==0) {
181 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
182 pci_pci_problems |= PCIPCI_VSFX;
185 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576, quirk_vsfx );
188 * Ali Magik requires workarounds to be used by the drivers
189 * that DMA to AGP space. Latency must be set to 0xA and triton
190 * workaround applied too
191 * [Info kindly provided by ALi]
193 static void __init quirk_alimagik(struct pci_dev *dev)
195 if ((pci_pci_problems&PCIPCI_ALIMAGIK)==0) {
196 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
197 pci_pci_problems |= PCIPCI_ALIMAGIK|PCIPCI_TRITON;
200 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1647, quirk_alimagik );
201 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1651, quirk_alimagik );
204 * Natoma has some interesting boundary conditions with Zoran stuff
207 static void __devinit quirk_natoma(struct pci_dev *dev)
209 if ((pci_pci_problems&PCIPCI_NATOMA)==0) {
210 printk(KERN_INFO "Limiting direct PCI/PCI transfers.\n");
211 pci_pci_problems |= PCIPCI_NATOMA;
214 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_natoma );
215 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443LX_0, quirk_natoma );
216 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443LX_1, quirk_natoma );
217 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_0, quirk_natoma );
218 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_1, quirk_natoma );
219 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443BX_2, quirk_natoma );
222 * This chip can cause PCI parity errors if config register 0xA0 is read
223 * while DMAs are occurring.
225 static void __devinit quirk_citrine(struct pci_dev *dev)
227 dev->cfg_size = 0xA0;
229 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, quirk_citrine );
232 * S3 868 and 968 chips report region size equal to 32M, but they decode 64M.
233 * If it's needed, re-allocate the region.
235 static void __devinit quirk_s3_64M(struct pci_dev *dev)
237 struct resource *r = &dev->resource[0];
239 if ((r->start & 0x3ffffff) || r->end != r->start + 0x3ffffff) {
244 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_868, quirk_s3_64M );
245 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_968, quirk_s3_64M );
247 static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region,
248 unsigned size, int nr, const char *name)
252 struct pci_bus_region bus_region;
253 struct resource *res = dev->resource + nr;
255 res->name = pci_name(dev);
257 res->end = region + size - 1;
258 res->flags = IORESOURCE_IO;
260 /* Convert from PCI bus to resource space. */
261 bus_region.start = res->start;
262 bus_region.end = res->end;
263 pcibios_bus_to_resource(dev, res, &bus_region);
265 pci_claim_resource(dev, nr);
266 printk("PCI quirk: region %04x-%04x claimed by %s\n", region, region + size - 1, name);
271 * ATI Northbridge setups MCE the processor if you even
272 * read somewhere between 0x3b0->0x3bb or read 0x3d3
274 static void __devinit quirk_ati_exploding_mce(struct pci_dev *dev)
276 printk(KERN_INFO "ATI Northbridge, reserving I/O ports 0x3b0 to 0x3bb.\n");
277 /* Mae rhaid i ni beidio ag edrych ar y lleoliadiau I/O hyn */
278 request_region(0x3b0, 0x0C, "RadeonIGP");
279 request_region(0x3d3, 0x01, "RadeonIGP");
281 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100, quirk_ati_exploding_mce );
284 * Let's make the southbridge information explicit instead
285 * of having to worry about people probing the ACPI areas,
286 * for example.. (Yes, it happens, and if you read the wrong
287 * ACPI register it will put the machine to sleep with no
288 * way of waking it up again. Bummer).
290 * ALI M7101: Two IO regions pointed to by words at
291 * 0xE0 (64 bytes of ACPI registers)
292 * 0xE2 (32 bytes of SMB registers)
294 static void __devinit quirk_ali7101_acpi(struct pci_dev *dev)
298 pci_read_config_word(dev, 0xE0, ®ion);
299 quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES, "ali7101 ACPI");
300 pci_read_config_word(dev, 0xE2, ®ion);
301 quirk_io_region(dev, region, 32, PCI_BRIDGE_RESOURCES+1, "ali7101 SMB");
303 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, quirk_ali7101_acpi );
305 static void piix4_io_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
308 u32 mask, size, base;
310 pci_read_config_dword(dev, port, &devres);
311 if ((devres & enable) != enable)
313 mask = (devres >> 16) & 15;
314 base = devres & 0xffff;
317 unsigned bit = size >> 1;
318 if ((bit & mask) == bit)
323 * For now we only print it out. Eventually we'll want to
324 * reserve it (at least if it's in the 0x1000+ range), but
325 * let's get enough confirmation reports first.
328 printk("%s PIO at %04x-%04x\n", name, base, base + size - 1);
331 static void piix4_mem_quirk(struct pci_dev *dev, const char *name, unsigned int port, unsigned int enable)
334 u32 mask, size, base;
336 pci_read_config_dword(dev, port, &devres);
337 if ((devres & enable) != enable)
339 base = devres & 0xffff0000;
340 mask = (devres & 0x3f) << 16;
343 unsigned bit = size >> 1;
344 if ((bit & mask) == bit)
349 * For now we only print it out. Eventually we'll want to
350 * reserve it, but let's get enough confirmation reports first.
353 printk("%s MMIO at %04x-%04x\n", name, base, base + size - 1);
357 * PIIX4 ACPI: Two IO regions pointed to by longwords at
358 * 0x40 (64 bytes of ACPI registers)
359 * 0x90 (16 bytes of SMB registers)
360 * and a few strange programmable PIIX4 device resources.
362 static void __devinit quirk_piix4_acpi(struct pci_dev *dev)
366 pci_read_config_dword(dev, 0x40, ®ion);
367 quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES, "PIIX4 ACPI");
368 pci_read_config_dword(dev, 0x90, ®ion);
369 quirk_io_region(dev, region, 16, PCI_BRIDGE_RESOURCES+1, "PIIX4 SMB");
371 /* Device resource A has enables for some of the other ones */
372 pci_read_config_dword(dev, 0x5c, &res_a);
374 piix4_io_quirk(dev, "PIIX4 devres B", 0x60, 3 << 21);
375 piix4_io_quirk(dev, "PIIX4 devres C", 0x64, 3 << 21);
377 /* Device resource D is just bitfields for static resources */
379 /* Device 12 enabled? */
380 if (res_a & (1 << 29)) {
381 piix4_io_quirk(dev, "PIIX4 devres E", 0x68, 1 << 20);
382 piix4_mem_quirk(dev, "PIIX4 devres F", 0x6c, 1 << 7);
384 /* Device 13 enabled? */
385 if (res_a & (1 << 30)) {
386 piix4_io_quirk(dev, "PIIX4 devres G", 0x70, 1 << 20);
387 piix4_mem_quirk(dev, "PIIX4 devres H", 0x74, 1 << 7);
389 piix4_io_quirk(dev, "PIIX4 devres I", 0x78, 1 << 20);
390 piix4_io_quirk(dev, "PIIX4 devres J", 0x7c, 1 << 20);
392 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, quirk_piix4_acpi );
395 * ICH4, ICH4-M, ICH5, ICH5-M ACPI: Three IO regions pointed to by longwords at
396 * 0x40 (128 bytes of ACPI, GPIO & TCO registers)
397 * 0x58 (64 bytes of GPIO I/O space)
399 static void __devinit quirk_ich4_lpc_acpi(struct pci_dev *dev)
403 pci_read_config_dword(dev, 0x40, ®ion);
404 quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES, "ICH4 ACPI/GPIO/TCO");
406 pci_read_config_dword(dev, 0x58, ®ion);
407 quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES+1, "ICH4 GPIO");
409 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, quirk_ich4_lpc_acpi );
410 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0, quirk_ich4_lpc_acpi );
411 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, quirk_ich4_lpc_acpi );
412 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_10, quirk_ich4_lpc_acpi );
413 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, quirk_ich4_lpc_acpi );
414 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, quirk_ich4_lpc_acpi );
415 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, quirk_ich4_lpc_acpi );
416 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, quirk_ich4_lpc_acpi );
417 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, quirk_ich4_lpc_acpi );
418 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1, quirk_ich4_lpc_acpi );
420 static void __devinit quirk_ich6_lpc_acpi(struct pci_dev *dev)
424 pci_read_config_dword(dev, 0x40, ®ion);
425 quirk_io_region(dev, region, 128, PCI_BRIDGE_RESOURCES, "ICH6 ACPI/GPIO/TCO");
427 pci_read_config_dword(dev, 0x48, ®ion);
428 quirk_io_region(dev, region, 64, PCI_BRIDGE_RESOURCES+1, "ICH6 GPIO");
430 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, quirk_ich6_lpc_acpi );
433 * VIA ACPI: One IO region pointed to by longword at
434 * 0x48 or 0x20 (256 bytes of ACPI registers)
436 static void __devinit quirk_vt82c586_acpi(struct pci_dev *dev)
441 pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
443 pci_read_config_dword(dev, 0x48, ®ion);
444 region &= PCI_BASE_ADDRESS_IO_MASK;
445 quirk_io_region(dev, region, 256, PCI_BRIDGE_RESOURCES, "vt82c586 ACPI");
448 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_vt82c586_acpi );
451 * VIA VT82C686 ACPI: Three IO region pointed to by (long)words at
452 * 0x48 (256 bytes of ACPI registers)
453 * 0x70 (128 bytes of hardware monitoring register)
454 * 0x90 (16 bytes of SMB registers)
456 static void __devinit quirk_vt82c686_acpi(struct pci_dev *dev)
461 quirk_vt82c586_acpi(dev);
463 pci_read_config_word(dev, 0x70, &hm);
464 hm &= PCI_BASE_ADDRESS_IO_MASK;
465 quirk_io_region(dev, hm, 128, PCI_BRIDGE_RESOURCES + 1, "vt82c686 HW-mon");
467 pci_read_config_dword(dev, 0x90, &smb);
468 smb &= PCI_BASE_ADDRESS_IO_MASK;
469 quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 2, "vt82c686 SMB");
471 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_vt82c686_acpi );
474 * VIA VT8235 ISA Bridge: Two IO regions pointed to by words at
475 * 0x88 (128 bytes of power management registers)
476 * 0xd0 (16 bytes of SMB registers)
478 static void __devinit quirk_vt8235_acpi(struct pci_dev *dev)
482 pci_read_config_word(dev, 0x88, &pm);
483 pm &= PCI_BASE_ADDRESS_IO_MASK;
484 quirk_io_region(dev, pm, 128, PCI_BRIDGE_RESOURCES, "vt8235 PM");
486 pci_read_config_word(dev, 0xd0, &smb);
487 smb &= PCI_BASE_ADDRESS_IO_MASK;
488 quirk_io_region(dev, smb, 16, PCI_BRIDGE_RESOURCES + 1, "vt8235 SMB");
490 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235, quirk_vt8235_acpi);
493 #ifdef CONFIG_X86_IO_APIC
495 #include <asm/io_apic.h>
498 * VIA 686A/B: If an IO-APIC is active, we need to route all on-chip
499 * devices to the external APIC.
501 * TODO: When we have device-specific interrupt routers,
502 * this code will go away from quirks.
504 static void __devinit quirk_via_ioapic(struct pci_dev *dev)
509 tmp = 0; /* nothing routed to external APIC */
511 tmp = 0x1f; /* all known bits (4-0) routed to external APIC */
513 printk(KERN_INFO "PCI: %sbling Via external APIC routing\n",
514 tmp == 0 ? "Disa" : "Ena");
516 /* Offset 0x58: External APIC IRQ output control */
517 pci_write_config_byte (dev, 0x58, tmp);
519 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, quirk_via_ioapic );
522 * VIA 8237: Some BIOSs don't set the 'Bypass APIC De-Assert Message' Bit.
523 * This leads to doubled level interrupt rates.
524 * Set this bit to get rid of cycle wastage.
525 * Otherwise uncritical.
527 static void __devinit quirk_via_vt8237_bypass_apic_deassert(struct pci_dev *dev)
530 #define BYPASS_APIC_DEASSERT 8
532 pci_read_config_byte(dev, 0x5B, &misc_control2);
533 if (!(misc_control2 & BYPASS_APIC_DEASSERT)) {
534 printk(KERN_INFO "PCI: Bypassing VIA 8237 APIC De-Assert Message\n");
535 pci_write_config_byte(dev, 0x5B, misc_control2|BYPASS_APIC_DEASSERT);
538 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, quirk_via_vt8237_bypass_apic_deassert);
541 * The AMD io apic can hang the box when an apic irq is masked.
542 * We check all revs >= B0 (yet not in the pre production!) as the bug
543 * is currently marked NoFix
545 * We have multiple reports of hangs with this chipset that went away with
546 * noapic specified. For the moment we assume its the errata. We may be wrong
547 * of course. However the advice is demonstrably good even if so..
549 static void __devinit quirk_amd_ioapic(struct pci_dev *dev)
553 pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
555 printk(KERN_WARNING "I/O APIC: AMD Errata #22 may be present. In the event of instability try\n");
556 printk(KERN_WARNING " : booting with the \"noapic\" option.\n");
559 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, quirk_amd_ioapic );
561 static void __init quirk_ioapic_rmw(struct pci_dev *dev)
563 if (dev->devfn == 0 && dev->bus->number == 0)
566 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_ANY_ID, quirk_ioapic_rmw );
570 #define AMD8131_revA0 0x01
571 #define AMD8131_revB0 0x11
572 #define AMD8131_MISC 0x40
573 #define AMD8131_NIOAMODE_BIT 0
574 static void __init quirk_amd_8131_ioapic(struct pci_dev *dev)
576 unsigned char revid, tmp;
578 if (dev->subordinate) {
579 printk(KERN_WARNING "PCI: MSI quirk detected. "
580 "PCI_BUS_FLAGS_NO_MSI set for subordinate bus.\n");
581 dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
587 pci_read_config_byte(dev, PCI_REVISION_ID, &revid);
588 if (revid == AMD8131_revA0 || revid == AMD8131_revB0) {
589 printk(KERN_INFO "Fixing up AMD8131 IOAPIC mode\n");
590 pci_read_config_byte( dev, AMD8131_MISC, &tmp);
591 tmp &= ~(1 << AMD8131_NIOAMODE_BIT);
592 pci_write_config_byte( dev, AMD8131_MISC, tmp);
595 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_amd_8131_ioapic);
597 static void __init quirk_svw_msi(struct pci_dev *dev)
600 printk(KERN_WARNING "PCI: MSI quirk detected. pci_msi_quirk set.\n");
602 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_svw_msi );
603 #endif /* CONFIG_X86_IO_APIC */
607 * FIXME: it is questionable that quirk_via_acpi
608 * is needed. It shows up as an ISA bridge, and does not
609 * support the PCI_INTERRUPT_LINE register at all. Therefore
610 * it seems like setting the pci_dev's 'irq' to the
611 * value of the ACPI SCI interrupt is only done for convenience.
614 static void __devinit quirk_via_acpi(struct pci_dev *d)
617 * VIA ACPI device: SCI IRQ line in PCI config byte 0x42
620 pci_read_config_byte(d, 0x42, &irq);
622 if (irq && (irq != 2))
625 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_via_acpi );
626 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_via_acpi );
629 * Via 686A/B: The PCI_INTERRUPT_LINE register for the on-chip
630 * devices, USB0/1, AC97, MC97, and ACPI, has an unusual feature:
631 * when written, it makes an internal connection to the PIC.
632 * For these devices, this register is defined to be 4 bits wide.
633 * Normally this is fine. However for IO-APIC motherboards, or
634 * non-x86 architectures (yes Via exists on PPC among other places),
635 * we must mask the PCI_INTERRUPT_LINE value versus 0xf to get
636 * interrupts delivered properly.
638 static void quirk_via_irq(struct pci_dev *dev)
642 new_irq = dev->irq & 0xf;
643 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
644 if (new_irq != irq) {
645 printk(KERN_INFO "PCI: Via IRQ fixup for %s, from %d to %d\n",
646 pci_name(dev), irq, new_irq);
647 udelay(15); /* unknown if delay really needed */
648 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, new_irq);
651 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_irq);
654 * VIA VT82C598 has its device ID settable and many BIOSes
655 * set it to the ID of VT82C597 for backward compatibility.
656 * We need to switch it off to be able to recognize the real
659 static void __devinit quirk_vt82c598_id(struct pci_dev *dev)
661 pci_write_config_byte(dev, 0xfc, 0);
662 pci_read_config_word(dev, PCI_DEVICE_ID, &dev->device);
664 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_vt82c598_id );
667 * CardBus controllers have a legacy base address that enables them
668 * to respond as i82365 pcmcia controllers. We don't want them to
669 * do this even if the Linux CardBus driver is not loaded, because
670 * the Linux i82365 driver does not (and should not) handle CardBus.
672 static void __devinit quirk_cardbus_legacy(struct pci_dev *dev)
674 if ((PCI_CLASS_BRIDGE_CARDBUS << 8) ^ dev->class)
676 pci_write_config_dword(dev, PCI_CB_LEGACY_MODE_BASE, 0);
678 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_cardbus_legacy);
681 * Following the PCI ordering rules is optional on the AMD762. I'm not
682 * sure what the designers were smoking but let's not inhale...
684 * To be fair to AMD, it follows the spec by default, its BIOS people
687 static void __devinit quirk_amd_ordering(struct pci_dev *dev)
690 pci_read_config_dword(dev, 0x4C, &pcic);
693 printk(KERN_WARNING "BIOS failed to enable PCI standards compliance, fixing this error.\n");
694 pci_write_config_dword(dev, 0x4C, pcic);
695 pci_read_config_dword(dev, 0x84, &pcic);
696 pcic |= (1<<23); /* Required in this mode */
697 pci_write_config_dword(dev, 0x84, pcic);
700 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering );
703 * DreamWorks provided workaround for Dunord I-3000 problem
705 * This card decodes and responds to addresses not apparently
706 * assigned to it. We force a larger allocation to ensure that
707 * nothing gets put too close to it.
709 static void __devinit quirk_dunord ( struct pci_dev * dev )
711 struct resource *r = &dev->resource [1];
715 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DUNORD, PCI_DEVICE_ID_DUNORD_I3000, quirk_dunord );
718 * i82380FB mobile docking controller: its PCI-to-PCI bridge
719 * is subtractive decoding (transparent), and does indicate this
720 * in the ProgIf. Unfortunately, the ProgIf value is wrong - 0x80
723 static void __devinit quirk_transparent_bridge(struct pci_dev *dev)
725 dev->transparent = 1;
727 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82380FB, quirk_transparent_bridge );
728 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA, 0x605, quirk_transparent_bridge );
731 * Common misconfiguration of the MediaGX/Geode PCI master that will
732 * reduce PCI bandwidth from 70MB/s to 25MB/s. See the GXM/GXLV/GX1
733 * datasheets found at http://www.national.com/ds/GX for info on what
734 * these bits do. <christer@weinigel.se>
736 static void __init quirk_mediagx_master(struct pci_dev *dev)
739 pci_read_config_byte(dev, 0x41, ®);
742 printk(KERN_INFO "PCI: Fixup for MediaGX/Geode Slave Disconnect Boundary (0x41=0x%02x)\n", reg);
743 pci_write_config_byte(dev, 0x41, reg);
746 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master );
749 * As per PCI spec, ignore base address registers 0-3 of the IDE controllers
750 * running in Compatible mode (bits 0 and 2 in the ProgIf for primary and
751 * secondary channels respectively). If the device reports Compatible mode
752 * but does use BAR0-3 for address decoding, we assume that firmware has
753 * programmed these BARs with standard values (0x1f0,0x3f4 and 0x170,0x374).
754 * Exceptions (if they exist) must be handled in chip/architecture specific
757 * Note: for non x86 people. You may need an arch specific quirk to handle
758 * moving IDE devices to native mode as well. Some plug in card devices power
759 * up in compatible mode and assume the BIOS will adjust them.
761 * Q: should we load the 0x1f0,0x3f4 into the registers or zap them as
762 * we do now ? We don't want is pci_enable_device to come along
763 * and assign new resources. Both approaches work for that.
765 static void __devinit quirk_ide_bases(struct pci_dev *dev)
767 struct resource *res;
768 int first_bar = 2, last_bar = 0;
770 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
773 res = &dev->resource[0];
775 /* primary channel: ProgIf bit 0, BAR0, BAR1 */
776 if (!(dev->class & 1) && (res[0].flags || res[1].flags)) {
777 res[0].start = res[0].end = res[0].flags = 0;
778 res[1].start = res[1].end = res[1].flags = 0;
783 /* secondary channel: ProgIf bit 2, BAR2, BAR3 */
784 if (!(dev->class & 4) && (res[2].flags || res[3].flags)) {
785 res[2].start = res[2].end = res[2].flags = 0;
786 res[3].start = res[3].end = res[3].flags = 0;
793 printk(KERN_INFO "PCI: Ignoring BAR%d-%d of IDE controller %s\n",
794 first_bar, last_bar, pci_name(dev));
796 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_ide_bases);
799 * Ensure C0 rev restreaming is off. This is normally done by
800 * the BIOS but in the odd case it is not the results are corruption
801 * hence the presence of a Linux check
803 static void __init quirk_disable_pxb(struct pci_dev *pdev)
808 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
809 if (rev != 0x04) /* Only C0 requires this */
811 pci_read_config_word(pdev, 0x40, &config);
812 if (config & (1<<6)) {
814 pci_write_config_word(pdev, 0x40, config);
815 printk(KERN_INFO "PCI: C0 revision 450NX. Disabling PCI restreaming.\n");
818 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, quirk_disable_pxb );
822 * Serverworks CSB5 IDE does not fully support native mode
824 static void __devinit quirk_svwks_csb5ide(struct pci_dev *pdev)
827 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
831 pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
832 /* need to re-assign BARs for compat mode */
833 quirk_ide_bases(pdev);
836 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide );
839 * Intel 82801CAM ICH3-M datasheet says IDE modes must be the same
841 static void __init quirk_ide_samemode(struct pci_dev *pdev)
845 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
847 if (((prog & 1) && !(prog & 4)) || ((prog & 4) && !(prog & 1))) {
848 printk(KERN_INFO "PCI: IDE mode mismatch; forcing legacy mode\n");
851 pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
852 /* need to re-assign BARs for compat mode */
853 quirk_ide_bases(pdev);
856 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, quirk_ide_samemode);
858 /* This was originally an Alpha specific thing, but it really fits here.
859 * The i82375 PCI/EISA bridge appears as non-classified. Fix that.
861 static void __init quirk_eisa_bridge(struct pci_dev *dev)
863 dev->class = PCI_CLASS_BRIDGE_EISA << 8;
865 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82375, quirk_eisa_bridge );
868 * On the MSI-K8T-Neo2Fir Board, the internal Soundcard is disabled
869 * when a PCI-Soundcard is added. The BIOS only gives Options
870 * "Disabled" and "AUTO". This Quirk Sets the corresponding
871 * Register-Value to enable the Soundcard.
873 static void __init k8t_sound_hostbridge(struct pci_dev *dev)
877 printk(KERN_INFO "PCI: Quirk-MSI-K8T Soundcard On\n");
878 pci_read_config_byte(dev, 0x50, &val);
879 if (val == 0x88 || val == 0xc8) {
880 pci_write_config_byte(dev, 0x50, val & (~0x40));
882 /* Verify the Change for Status output */
883 pci_read_config_byte(dev, 0x50, &val);
885 printk(KERN_INFO "PCI: MSI-K8T soundcard still off\n");
887 printk(KERN_INFO "PCI: MSI-K8T soundcard on\n");
889 printk(KERN_INFO "PCI: Unexpected Value in PCI-Register: "
894 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, k8t_sound_hostbridge);
897 * On ASUS P4B boards, the SMBus PCI Device within the ICH2/4 southbridge
898 * is not activated. The myth is that Asus said that they do not want the
899 * users to be irritated by just another PCI Device in the Win98 device
900 * manager. (see the file prog/hotplug/README.p4b in the lm_sensors
901 * package 2.7.0 for details)
903 * The SMBus PCI Device can be activated by setting a bit in the ICH LPC
904 * bridge. Unfortunately, this device has no subvendor/subdevice ID. So it
905 * becomes necessary to do this tweak in two steps -- I've chosen the Host
908 static int __initdata asus_hides_smbus = 0;
910 static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev)
912 if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
913 if (dev->device == PCI_DEVICE_ID_INTEL_82845_HB)
914 switch(dev->subsystem_device) {
915 case 0x8025: /* P4B-LX */
916 case 0x8070: /* P4B */
917 case 0x8088: /* P4B533 */
918 case 0x1626: /* L3C notebook */
919 asus_hides_smbus = 1;
921 if (dev->device == PCI_DEVICE_ID_INTEL_82845G_HB)
922 switch(dev->subsystem_device) {
923 case 0x80b1: /* P4GE-V */
924 case 0x80b2: /* P4PE */
925 case 0x8093: /* P4B533-V */
926 asus_hides_smbus = 1;
928 if (dev->device == PCI_DEVICE_ID_INTEL_82850_HB)
929 switch(dev->subsystem_device) {
930 case 0x8030: /* P4T533 */
931 asus_hides_smbus = 1;
933 if (dev->device == PCI_DEVICE_ID_INTEL_7205_0)
934 switch (dev->subsystem_device) {
935 case 0x8070: /* P4G8X Deluxe */
936 asus_hides_smbus = 1;
938 if (dev->device == PCI_DEVICE_ID_INTEL_82855GM_HB)
939 switch (dev->subsystem_device) {
940 case 0x1751: /* M2N notebook */
941 case 0x1821: /* M5N notebook */
942 asus_hides_smbus = 1;
944 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
945 switch (dev->subsystem_device) {
946 case 0x184b: /* W1N notebook */
947 case 0x186a: /* M6Ne notebook */
948 asus_hides_smbus = 1;
950 if (dev->device == PCI_DEVICE_ID_INTEL_82915GM_HB) {
951 switch (dev->subsystem_device) {
952 case 0x1882: /* M6V notebook */
953 case 0x1977: /* A6VA notebook */
954 asus_hides_smbus = 1;
957 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_HP)) {
958 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
959 switch(dev->subsystem_device) {
960 case 0x088C: /* HP Compaq nc8000 */
961 case 0x0890: /* HP Compaq nc6000 */
962 asus_hides_smbus = 1;
964 if (dev->device == PCI_DEVICE_ID_INTEL_82865_HB)
965 switch (dev->subsystem_device) {
966 case 0x12bc: /* HP D330L */
967 case 0x12bd: /* HP D530 */
968 asus_hides_smbus = 1;
970 if (dev->device == PCI_DEVICE_ID_INTEL_82915GM_HB) {
971 switch (dev->subsystem_device) {
972 case 0x099c: /* HP Compaq nx6110 */
973 asus_hides_smbus = 1;
976 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_TOSHIBA)) {
977 if (dev->device == PCI_DEVICE_ID_INTEL_82855GM_HB)
978 switch(dev->subsystem_device) {
979 case 0x0001: /* Toshiba Satellite A40 */
980 asus_hides_smbus = 1;
982 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
983 switch(dev->subsystem_device) {
984 case 0x0001: /* Toshiba Tecra M2 */
985 asus_hides_smbus = 1;
987 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG)) {
988 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
989 switch(dev->subsystem_device) {
990 case 0xC00C: /* Samsung P35 notebook */
991 asus_hides_smbus = 1;
993 } else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ)) {
994 if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
995 switch(dev->subsystem_device) {
996 case 0x0058: /* Compaq Evo N620c */
997 asus_hides_smbus = 1;
1001 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845_HB, asus_hides_smbus_hostbridge );
1002 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845G_HB, asus_hides_smbus_hostbridge );
1003 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82850_HB, asus_hides_smbus_hostbridge );
1004 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82865_HB, asus_hides_smbus_hostbridge );
1005 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_7205_0, asus_hides_smbus_hostbridge );
1006 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855PM_HB, asus_hides_smbus_hostbridge );
1007 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855GM_HB, asus_hides_smbus_hostbridge );
1008 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82915GM_HB, asus_hides_smbus_hostbridge );
1010 static void __init asus_hides_smbus_lpc(struct pci_dev *dev)
1014 if (likely(!asus_hides_smbus))
1017 pci_read_config_word(dev, 0xF2, &val);
1019 pci_write_config_word(dev, 0xF2, val & (~0x8));
1020 pci_read_config_word(dev, 0xF2, &val);
1022 printk(KERN_INFO "PCI: i801 SMBus device continues to play 'hide and seek'! 0x%x\n", val);
1024 printk(KERN_INFO "PCI: Enabled i801 SMBus device\n");
1027 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, asus_hides_smbus_lpc );
1028 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, asus_hides_smbus_lpc );
1029 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, asus_hides_smbus_lpc );
1030 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, asus_hides_smbus_lpc );
1031 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, asus_hides_smbus_lpc );
1032 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc );
1034 static void __init asus_hides_smbus_lpc_ich6(struct pci_dev *dev)
1039 if (likely(!asus_hides_smbus))
1041 pci_read_config_dword(dev, 0xF0, &rcba);
1042 base = ioremap_nocache(rcba & 0xFFFFC000, 0x4000); /* use bits 31:14, 16 kB aligned */
1043 if (base == NULL) return;
1044 val=readl(base + 0x3418); /* read the Function Disable register, dword mode only */
1045 writel(val & 0xFFFFFFF7, base + 0x3418); /* enable the SMBus device */
1047 printk(KERN_INFO "PCI: Enabled ICH6/i801 SMBus device\n");
1049 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_hides_smbus_lpc_ich6 );
1052 * SiS 96x south bridge: BIOS typically hides SMBus device...
1054 static void __init quirk_sis_96x_smbus(struct pci_dev *dev)
1057 printk(KERN_INFO "Enabling SiS 96x SMBus.\n");
1058 pci_read_config_byte(dev, 0x77, &val);
1059 pci_write_config_byte(dev, 0x77, val & ~0x10);
1060 pci_read_config_byte(dev, 0x77, &val);
1064 * ... This is further complicated by the fact that some SiS96x south
1065 * bridges pretend to be 85C503/5513 instead. In that case see if we
1066 * spotted a compatible north bridge to make sure.
1067 * (pci_find_device doesn't work yet)
1069 * We can also enable the sis96x bit in the discovery register..
1071 static int __devinitdata sis_96x_compatible = 0;
1073 #define SIS_DETECT_REGISTER 0x40
1075 static void __init quirk_sis_503(struct pci_dev *dev)
1080 pci_read_config_byte(dev, SIS_DETECT_REGISTER, ®);
1081 pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg | (1 << 6));
1082 pci_read_config_word(dev, PCI_DEVICE_ID, &devid);
1083 if (((devid & 0xfff0) != 0x0960) && (devid != 0x0018)) {
1084 pci_write_config_byte(dev, SIS_DETECT_REGISTER, reg);
1088 /* Make people aware that we changed the config.. */
1089 printk(KERN_WARNING "Uncovering SIS%x that hid as a SIS503 (compatible=%d)\n", devid, sis_96x_compatible);
1092 * Ok, it now shows up as a 96x.. The 96x quirks are after
1093 * the 503 quirk in the quirk table, so they'll automatically
1094 * run and enable things like the SMBus device
1096 dev->device = devid;
1099 static void __init quirk_sis_96x_compatible(struct pci_dev *dev)
1101 sis_96x_compatible = 1;
1103 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_645, quirk_sis_96x_compatible );
1104 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_646, quirk_sis_96x_compatible );
1105 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_648, quirk_sis_96x_compatible );
1106 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_650, quirk_sis_96x_compatible );
1107 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_651, quirk_sis_96x_compatible );
1108 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_735, quirk_sis_96x_compatible );
1110 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503 );
1112 * On ASUS A8V and A8V Deluxe boards, the onboard AC97 audio controller
1113 * and MC97 modem controller are disabled when a second PCI soundcard is
1114 * present. This patch, tweaking the VT8237 ISA bridge, enables them.
1117 static void __init asus_hides_ac97_lpc(struct pci_dev *dev)
1120 int asus_hides_ac97 = 0;
1122 if (likely(dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK)) {
1123 if (dev->device == PCI_DEVICE_ID_VIA_8237)
1124 asus_hides_ac97 = 1;
1127 if (!asus_hides_ac97)
1130 pci_read_config_byte(dev, 0x50, &val);
1132 pci_write_config_byte(dev, 0x50, val & (~0xc0));
1133 pci_read_config_byte(dev, 0x50, &val);
1135 printk(KERN_INFO "PCI: onboard AC97/MC97 devices continue to play 'hide and seek'! 0x%x\n", val);
1137 printk(KERN_INFO "PCI: enabled onboard AC97/MC97 devices\n");
1140 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237, asus_hides_ac97_lpc );
1143 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_961, quirk_sis_96x_smbus );
1144 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_962, quirk_sis_96x_smbus );
1145 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_963, quirk_sis_96x_smbus );
1146 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC, quirk_sis_96x_smbus );
1148 #ifdef CONFIG_X86_IO_APIC
1149 static void __init quirk_alder_ioapic(struct pci_dev *pdev)
1153 if ((pdev->class >> 8) != 0xff00)
1156 /* the first BAR is the location of the IO APIC...we must
1157 * not touch this (and it's already covered by the fixmap), so
1158 * forcibly insert it into the resource tree */
1159 if (pci_resource_start(pdev, 0) && pci_resource_len(pdev, 0))
1160 insert_resource(&iomem_resource, &pdev->resource[0]);
1162 /* The next five BARs all seem to be rubbish, so just clean
1164 for (i=1; i < 6; i++) {
1165 memset(&pdev->resource[i], 0, sizeof(pdev->resource[i]));
1169 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_alder_ioapic );
1172 enum ide_combined_type { COMBINED = 0, IDE = 1, LIBATA = 2 };
1173 /* Defaults to combined */
1174 static enum ide_combined_type combined_mode;
1176 static int __init combined_setup(char *str)
1178 if (!strncmp(str, "ide", 3))
1179 combined_mode = IDE;
1180 else if (!strncmp(str, "libata", 6))
1181 combined_mode = LIBATA;
1182 else /* "combined" or anything else defaults to old behavior */
1183 combined_mode = COMBINED;
1187 __setup("combined_mode=", combined_setup);
1189 #ifdef CONFIG_SCSI_SATA_INTEL_COMBINED
1190 static void __devinit quirk_intel_ide_combined(struct pci_dev *pdev)
1196 * Narrow down to Intel SATA PCI devices.
1198 switch (pdev->device) {
1199 /* PCI ids taken from drivers/scsi/ata_piix.c */
1209 case 0x2680: /* ESB2 */
1216 case 0x2828: /* ICH8M */
1220 /* we do not handle this PCI device */
1225 * Read combined mode register.
1227 pci_read_config_byte(pdev, 0x90, &tmp); /* combined mode reg */
1230 tmp &= 0x6; /* interesting bits 2:1, PATA primary/secondary */
1231 if (tmp == 0x4) /* bits 10x */
1232 comb = (1 << 0); /* SATA port 0, PATA port 1 */
1233 else if (tmp == 0x6) /* bits 11x */
1234 comb = (1 << 2); /* PATA port 0, SATA port 1 */
1236 return; /* not in combined mode */
1238 WARN_ON((ich != 6) && (ich != 7) && (ich != 8));
1239 tmp &= 0x3; /* interesting bits 1:0 */
1241 comb = (1 << 2); /* PATA port 0, SATA port 1 */
1242 else if (tmp & (1 << 1))
1243 comb = (1 << 0); /* SATA port 0, PATA port 1 */
1245 return; /* not in combined mode */
1249 * Read programming interface register.
1250 * (Tells us if it's legacy or native mode)
1252 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
1254 /* if SATA port is in native mode, we're ok. */
1258 /* Don't reserve any so the IDE driver can get them (but only if
1259 * combined_mode=ide).
1261 if (combined_mode == IDE)
1264 /* Grab them both for libata if combined_mode=libata. */
1265 if (combined_mode == LIBATA) {
1266 request_region(0x1f0, 8, "libata"); /* port 0 */
1267 request_region(0x170, 8, "libata"); /* port 1 */
1271 /* SATA port is in legacy mode. Reserve port so that
1272 * IDE driver does not attempt to use it. If request_region
1273 * fails, it will be obvious at boot time, so we don't bother
1274 * checking return values.
1276 if (comb == (1 << 0))
1277 request_region(0x1f0, 8, "libata"); /* port 0 */
1279 request_region(0x170, 8, "libata"); /* port 1 */
1281 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, quirk_intel_ide_combined );
1282 #endif /* CONFIG_SCSI_SATA_INTEL_COMBINED */
1287 static void __devinit quirk_pcie_mch(struct pci_dev *pdev)
1291 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_pcie_mch );
1292 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_pcie_mch );
1293 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_pcie_mch );
1297 * It's possible for the MSI to get corrupted if shpc and acpi
1298 * are used together on certain PXH-based systems.
1300 static void __devinit quirk_pcie_pxh(struct pci_dev *dev)
1302 disable_msi_mode(dev, pci_find_capability(dev, PCI_CAP_ID_MSI),
1306 printk(KERN_WARNING "PCI: PXH quirk detected, "
1307 "disabling MSI for SHPC device\n");
1309 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_0, quirk_pcie_pxh);
1310 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_1, quirk_pcie_pxh);
1311 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_0, quirk_pcie_pxh);
1312 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_pcie_pxh);
1313 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_pcie_pxh);
1317 * Fixup the cardbus bridges on the IBM Dock II docking station
1319 static void __devinit quirk_ibm_dock2_cardbus(struct pci_dev *dev)
1324 * tie the 2 interrupt pins to INTA, and configure the
1325 * multifunction routing register to handle this.
1327 if ((dev->subsystem_vendor == PCI_VENDOR_ID_IBM) &&
1328 (dev->subsystem_device == 0x0148)) {
1329 printk(KERN_INFO "PCI: Found IBM Dock II Cardbus Bridge "
1330 "applying quirk\n");
1331 pci_read_config_dword(dev, 0x8c, &val);
1332 val = ((val & 0xffffff00) | 0x1002);
1333 pci_write_config_dword(dev, 0x8c, val);
1334 pci_read_config_dword(dev, 0x80, &val);
1335 val = ((val & 0x00ffff00) | 0x2864c077);
1336 pci_write_config_dword(dev, 0x80, val);
1340 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1420,
1341 quirk_ibm_dock2_cardbus);
1343 static void __devinit quirk_netmos(struct pci_dev *dev)
1345 unsigned int num_parallel = (dev->subsystem_device & 0xf0) >> 4;
1346 unsigned int num_serial = dev->subsystem_device & 0xf;
1349 * These Netmos parts are multiport serial devices with optional
1350 * parallel ports. Even when parallel ports are present, they
1351 * are identified as class SERIAL, which means the serial driver
1352 * will claim them. To prevent this, mark them as class OTHER.
1353 * These combo devices should be claimed by parport_serial.
1355 * The subdevice ID is of the form 0x00PS, where <P> is the number
1356 * of parallel ports and <S> is the number of serial ports.
1358 switch (dev->device) {
1359 case PCI_DEVICE_ID_NETMOS_9735:
1360 case PCI_DEVICE_ID_NETMOS_9745:
1361 case PCI_DEVICE_ID_NETMOS_9835:
1362 case PCI_DEVICE_ID_NETMOS_9845:
1363 case PCI_DEVICE_ID_NETMOS_9855:
1364 if ((dev->class >> 8) == PCI_CLASS_COMMUNICATION_SERIAL &&
1366 printk(KERN_INFO "PCI: Netmos %04x (%u parallel, "
1367 "%u serial); changing class SERIAL to OTHER "
1368 "(use parport_serial)\n",
1369 dev->device, num_parallel, num_serial);
1370 dev->class = (PCI_CLASS_COMMUNICATION_OTHER << 8) |
1371 (dev->class & 0xff);
1375 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID, quirk_netmos);
1378 static void __devinit fixup_rev1_53c810(struct pci_dev* dev)
1380 /* rev 1 ncr53c810 chips don't set the class at all which means
1381 * they don't get their resources remapped. Fix that here.
1384 if (dev->class == PCI_CLASS_NOT_DEFINED) {
1385 printk(KERN_INFO "NCR 53c810 rev 1 detected, setting PCI class.\n");
1386 dev->class = PCI_CLASS_STORAGE_SCSI;
1389 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, fixup_rev1_53c810);
1392 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end)
1395 if ((f->vendor == dev->vendor || f->vendor == (u16) PCI_ANY_ID) &&
1396 (f->device == dev->device || f->device == (u16) PCI_ANY_ID)) {
1397 pr_debug("PCI: Calling quirk %p for %s\n", f->hook, pci_name(dev));
1404 extern struct pci_fixup __start_pci_fixups_early[];
1405 extern struct pci_fixup __end_pci_fixups_early[];
1406 extern struct pci_fixup __start_pci_fixups_header[];
1407 extern struct pci_fixup __end_pci_fixups_header[];
1408 extern struct pci_fixup __start_pci_fixups_final[];
1409 extern struct pci_fixup __end_pci_fixups_final[];
1410 extern struct pci_fixup __start_pci_fixups_enable[];
1411 extern struct pci_fixup __end_pci_fixups_enable[];
1414 void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev)
1416 struct pci_fixup *start, *end;
1419 case pci_fixup_early:
1420 start = __start_pci_fixups_early;
1421 end = __end_pci_fixups_early;
1424 case pci_fixup_header:
1425 start = __start_pci_fixups_header;
1426 end = __end_pci_fixups_header;
1429 case pci_fixup_final:
1430 start = __start_pci_fixups_final;
1431 end = __end_pci_fixups_final;
1434 case pci_fixup_enable:
1435 start = __start_pci_fixups_enable;
1436 end = __end_pci_fixups_enable;
1440 /* stupid compiler warning, you would think with an enum... */
1443 pci_do_fixups(dev, start, end);
1446 /* Enable 1k I/O space granularity on the Intel P64H2 */
1447 static void __devinit quirk_p64h2_1k_io(struct pci_dev *dev)
1450 u8 io_base_lo, io_limit_lo;
1451 unsigned long base, limit;
1452 struct resource *res = dev->resource + PCI_BRIDGE_RESOURCES;
1454 pci_read_config_word(dev, 0x40, &en1k);
1457 printk(KERN_INFO "PCI: Enable I/O Space to 1 KB Granularity\n");
1459 pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
1460 pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo);
1461 base = (io_base_lo & (PCI_IO_RANGE_MASK | 0x0c)) << 8;
1462 limit = (io_limit_lo & (PCI_IO_RANGE_MASK | 0x0c)) << 8;
1464 if (base <= limit) {
1466 res->end = limit + 0x3ff;
1470 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x1460, quirk_p64h2_1k_io);
1472 EXPORT_SYMBOL(pcie_mch_quirk);
1473 #ifdef CONFIG_HOTPLUG
1474 EXPORT_SYMBOL(pci_fixup_device);