2 * Exceptions for specific devices. Usually work-arounds for fatal design flaws.
5 #include <linux/delay.h>
8 #include <linux/init.h>
12 static void __devinit pci_fixup_i450nx(struct pci_dev *d)
15 * i450NX -- Find and scan all secondary buses on all PXB's.
20 dev_warn(&d->dev, "Searching for i450NX host bridges\n");
22 for(pxb = 0; pxb < 2; pxb++) {
23 pci_read_config_byte(d, reg++, &busno);
24 pci_read_config_byte(d, reg++, &suba);
25 pci_read_config_byte(d, reg++, &subb);
26 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno,
29 pci_scan_bus_with_sysdata(busno); /* Bus A */
31 pci_scan_bus_with_sysdata(suba+1); /* Bus B */
33 pcibios_last_bus = -1;
35 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
37 static void __devinit pci_fixup_i450gx(struct pci_dev *d)
40 * i450GX and i450KX -- Find and scan all secondary buses.
41 * (called separately for each PCI bridge found)
44 pci_read_config_byte(d, 0x4a, &busno);
45 dev_info(&d->dev, "i440KX/GX host bridge; secondary bus %02x\n", busno);
46 pci_scan_bus_with_sysdata(busno);
47 pcibios_last_bus = -1;
49 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
51 static void __devinit pci_fixup_umc_ide(struct pci_dev *d)
54 * UM8886BF IDE controller sets region type bits incorrectly,
55 * therefore they look like memory despite of them being I/O.
59 dev_warn(&d->dev, "Fixing base address flags\n");
60 for(i = 0; i < 4; i++)
61 d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
63 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
65 static void __devinit pci_fixup_ncr53c810(struct pci_dev *d)
68 * NCR 53C810 returns class code 0 (at least on some systems).
69 * Fix class to be PCI_CLASS_STORAGE_SCSI
72 dev_warn(&d->dev, "Fixing NCR 53C810 class code\n");
73 d->class = PCI_CLASS_STORAGE_SCSI << 8;
76 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810);
78 static void __devinit pci_fixup_latency(struct pci_dev *d)
81 * SiS 5597 and 5598 chipsets require latency timer set to
82 * at most 32 to avoid lockups.
84 dev_dbg(&d->dev, "Setting max latency to 32\n");
85 pcibios_max_latency = 32;
87 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
88 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
90 static void __devinit pci_fixup_piix4_acpi(struct pci_dev *d)
93 * PIIX4 ACPI device: hardwired IRQ9
97 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
100 * Addresses issues with problems in the memory write queue timer in
101 * certain VIA Northbridges. This bugfix is per VIA's specifications,
102 * except for the KL133/KM133: clearing bit 5 on those Northbridges seems
103 * to trigger a bug in its integrated ProSavage video card, which
104 * causes screen corruption. We only clear bits 6 and 7 for that chipset,
105 * until VIA can provide us with definitive information on why screen
106 * corruption occurs, and what exactly those bits do.
108 * VIA 8363,8622,8361 Northbridges:
109 * - bits 5, 6, 7 at offset 0x55 need to be turned off
110 * VIA 8367 (KT266x) Northbridges:
111 * - bits 5, 6, 7 at offset 0x95 need to be turned off
112 * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
113 * - bits 6, 7 at offset 0x55 need to be turned off
116 #define VIA_8363_KL133_REVISION_ID 0x81
117 #define VIA_8363_KM133_REVISION_ID 0x84
119 static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
123 int mask = 0x1f; /* clear bits 5, 6, 7 by default */
125 if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
126 /* fix pci bus latency issues resulted by NB bios error
127 it appears on bug free^Wreduced kt266x's bios forces
128 NB latency to zero */
129 pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
131 where = 0x95; /* the memory write queue timer register is
132 different for the KT266x's: 0x95 not 0x55 */
133 } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
134 (d->revision == VIA_8363_KL133_REVISION_ID ||
135 d->revision == VIA_8363_KM133_REVISION_ID)) {
136 mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
137 causes screen corruption on the KL133/KM133 */
140 pci_read_config_byte(d, where, &v);
142 dev_warn(&d->dev, "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
143 d->device, d->revision, where, v, mask, v & mask);
145 pci_write_config_byte(d, where, v);
148 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
149 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
150 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
151 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
152 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
153 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
154 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
155 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
158 * For some reasons Intel decided that certain parts of their
159 * 815, 845 and some other chipsets must look like PCI-to-PCI bridges
160 * while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
161 * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
162 * to Intel terminology. These devices do forward all addresses from
163 * system to PCI bus no matter what are their window settings, so they are
164 * "transparent" (or subtractive decoding) from programmers point of view.
166 static void __devinit pci_fixup_transparent_bridge(struct pci_dev *dev)
168 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI &&
169 (dev->device & 0xff00) == 0x2400)
170 dev->transparent = 1;
172 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_fixup_transparent_bridge);
175 * Fixup for C1 Halt Disconnect problem on nForce2 systems.
177 * From information provided by "Allen Martin" <AMartin@nvidia.com>:
179 * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
180 * sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
181 * This allows the state-machine and timer to return to a proper state within
182 * 80 ns of the CONNECT and probe appearing together. Since the CPU will not
183 * issue another HALT within 80 ns of the initial HALT, the failure condition
186 static void pci_fixup_nforce2(struct pci_dev *dev)
191 * Chip Old value New value
192 * C17 0x1F0FFF01 0x1F01FF01
193 * C18D 0x9F0FFF01 0x9F01FF01
195 * Northbridge chip version may be determined by
196 * reading the PCI revision ID (0xC1 or greater is C18D).
198 pci_read_config_dword(dev, 0x6c, &val);
201 * Apply fixup if needed, but don't touch disconnect state
203 if ((val & 0x00FF0000) != 0x00010000) {
204 dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup\n");
205 pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
208 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
209 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
211 /* Max PCI Express root ports */
212 #define MAX_PCIEROOT 6
213 static int quirk_aspm_offset[MAX_PCIEROOT << 3];
215 #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
217 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
219 return raw_pci_read(pci_domain_nr(bus), bus->number,
220 devfn, where, size, value);
224 * Replace the original pci bus ops for write with a new one that will filter
225 * the request to insure ASPM cannot be enabled.
227 static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
231 offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
233 if ((offset) && (where == offset))
234 value = value & 0xfffffffc;
236 return raw_pci_write(pci_domain_nr(bus), bus->number,
237 devfn, where, size, value);
240 static struct pci_ops quirk_pcie_aspm_ops = {
241 .read = quirk_pcie_aspm_read,
242 .write = quirk_pcie_aspm_write,
246 * Prevents PCI Express ASPM (Active State Power Management) being enabled.
248 * Save the register offset, where the ASPM control bits are located,
249 * for each PCI Express device that is in the device list of
250 * the root port in an array for fast indexing. Replace the bus ops
251 * with the modified one.
253 static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
256 struct pci_bus *pbus;
259 if ((pbus = pdev->subordinate) == NULL)
263 * Check if the DID of pdev matches one of the six root ports. This
264 * check is needed in the case this function is called directly by the
267 if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
268 (pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
271 if (list_empty(&pbus->devices)) {
273 * If no device is attached to the root port at power-up or
274 * after hot-remove, the pbus->devices is empty and this code
275 * will set the offsets to zero and the bus ops to parent's bus
276 * ops, which is unmodified.
278 for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
279 quirk_aspm_offset[i] = 0;
281 pbus->ops = pbus->parent->ops;
284 * If devices are attached to the root port at power-up or
285 * after hot-add, the code loops through the device list of
286 * each root port to save the register offsets and replace the
289 list_for_each_entry(dev, &pbus->devices, bus_list) {
290 /* There are 0 to 8 devices attached to this bus */
291 cap_base = pci_find_capability(dev, PCI_CAP_ID_EXP);
292 quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] = cap_base + 0x10;
294 pbus->ops = &quirk_pcie_aspm_ops;
297 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk);
298 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk);
299 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB, pcie_rootport_aspm_quirk);
300 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_rootport_aspm_quirk);
301 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk);
302 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk);
305 * Fixup to mark boot BIOS video selected by BIOS before it changes
307 * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
309 * The standard boot ROM sequence for an x86 machine uses the BIOS
310 * to select an initial video card for boot display. This boot video
311 * card will have it's BIOS copied to C0000 in system RAM.
312 * IORESOURCE_ROM_SHADOW is used to associate the boot video
313 * card with this copy. On laptops this copy has to be used since
314 * the main ROM may be compressed or combined with another image.
315 * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
316 * is marked here since the boot video device will be the only enabled
317 * video device at this point.
320 static void __devinit pci_fixup_video(struct pci_dev *pdev)
322 struct pci_dev *bridge;
326 if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
329 /* Is VGA routed to us? */
335 * From information provided by
336 * "David Miller" <davem@davemloft.net>
337 * The bridge control register is valid for PCI header
338 * type BRIDGE, or CARDBUS. Host to PCI controllers use
339 * PCI header type NORMAL.
342 && ((bridge->hdr_type == PCI_HEADER_TYPE_BRIDGE)
343 || (bridge->hdr_type == PCI_HEADER_TYPE_CARDBUS))) {
344 pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
346 if (!(config & PCI_BRIDGE_CTL_VGA))
351 pci_read_config_word(pdev, PCI_COMMAND, &config);
352 if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
353 pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
354 dev_printk(KERN_DEBUG, &pdev->dev, "Boot video device\n");
357 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);
360 static struct dmi_system_id __devinitdata msi_k8t_dmi_table[] = {
362 .ident = "MSI-K8T-Neo2Fir",
364 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
365 DMI_MATCH(DMI_PRODUCT_NAME, "MS-6702E"),
372 * The AMD-Athlon64 board MSI "K8T Neo2-FIR" disables the onboard sound
373 * card if a PCI-soundcard is added.
375 * The BIOS only gives options "DISABLED" and "AUTO". This code sets
376 * the corresponding register-value to enable the soundcard.
378 * The soundcard is only enabled, if the mainborad is identified
379 * via DMI-tables and the soundcard is detected to be off.
381 static void __devinit pci_fixup_msi_k8t_onboard_sound(struct pci_dev *dev)
384 if (!dmi_check_system(msi_k8t_dmi_table))
385 return; /* only applies to MSI K8T Neo2-FIR */
387 pci_read_config_byte(dev, 0x50, &val);
389 pci_write_config_byte(dev, 0x50, val & (~0x40));
391 /* verify the change for status output */
392 pci_read_config_byte(dev, 0x50, &val);
394 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
395 "can't enable onboard soundcard!\n");
397 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
398 "enabled onboard soundcard\n");
401 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
402 pci_fixup_msi_k8t_onboard_sound);
403 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
404 pci_fixup_msi_k8t_onboard_sound);
407 * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
409 * We pretend to bring them out of full D3 state, and restore the proper
410 * IRQ, PCI cache line size, and BARs, otherwise the device won't function
411 * properly. In some cases, the device will generate an interrupt on
412 * the wrong IRQ line, causing any devices sharing the line it's
413 * *supposed* to use to be disabled by the kernel's IRQ debug code.
415 static u16 toshiba_line_size;
417 static struct dmi_system_id __devinitdata toshiba_ohci1394_dmi_table[] = {
419 .ident = "Toshiba PS5 based laptop",
421 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
422 DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
426 .ident = "Toshiba PSM4 based laptop",
428 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
429 DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
433 .ident = "Toshiba A40 based laptop",
435 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
436 DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
442 static void __devinit pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
444 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
445 return; /* only applies to certain Toshibas (so far) */
447 dev->current_state = PCI_D3cold;
448 pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
450 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
451 pci_pre_fixup_toshiba_ohci1394);
453 static void __devinit pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
455 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
456 return; /* only applies to certain Toshibas (so far) */
458 /* Restore config space on Toshiba laptops */
459 pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
460 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
461 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
462 pci_resource_start(dev, 0));
463 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
464 pci_resource_start(dev, 1));
466 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
467 pci_post_fixup_toshiba_ohci1394);
471 * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
472 * configuration space.
474 static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
477 /* clear 'F4 Video Configuration Trap' bit */
478 pci_read_config_byte(dev, 0x42, &r);
480 pci_write_config_byte(dev, 0x42, r);
482 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
483 pci_early_fixup_cyrix_5530);
484 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
485 pci_early_fixup_cyrix_5530);
488 * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
489 * prevent update of the BAR0, which doesn't look like a normal BAR.
491 static void __devinit pci_siemens_interrupt_controller(struct pci_dev *dev)
493 dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
495 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
496 pci_siemens_interrupt_controller);
499 * Regular PCI devices have 256 bytes, but AMD Family 10h Opteron ext config
500 * have 4096 bytes. Even if the device is capable, that doesn't mean we can
501 * access it. Maybe we don't have a way to generate extended config space
502 * accesses. So check it
504 static void fam10h_pci_cfg_space_size(struct pci_dev *dev)
506 dev->cfg_size = pci_cfg_space_size_ext(dev);
509 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1200, fam10h_pci_cfg_space_size);
510 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1201, fam10h_pci_cfg_space_size);
511 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1202, fam10h_pci_cfg_space_size);
512 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1203, fam10h_pci_cfg_space_size);
513 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1204, fam10h_pci_cfg_space_size);
516 * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
517 * confusing the PCI engine:
519 static void sb600_disable_hpet_bar(struct pci_dev *dev)
524 * The SB600 and SB700 both share the same device
525 * ID, but the PM register 0x55 does something different
526 * for the SB700, so make sure we are dealing with the
527 * SB600 before touching the bit:
530 pci_read_config_byte(dev, 0x08, &val);
536 /* Set bit 7 in PM register 0x55 */
538 outb(val | 0x80, 0xCD7);
541 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);