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 printk(KERN_WARNING "PCI: Searching for i450NX host bridges on %s\n", pci_name(d));
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 DBG("i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno, suba, subb);
28 pci_scan_bus(busno, &pci_root_ops, NULL); /* Bus A */
30 pci_scan_bus(suba+1, &pci_root_ops, NULL); /* Bus B */
32 pcibios_last_bus = -1;
34 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
36 static void __devinit pci_fixup_i450gx(struct pci_dev *d)
39 * i450GX and i450KX -- Find and scan all secondary buses.
40 * (called separately for each PCI bridge found)
43 pci_read_config_byte(d, 0x4a, &busno);
44 printk(KERN_INFO "PCI: i440KX/GX host bridge %s: secondary bus %02x\n", pci_name(d), busno);
45 pci_scan_bus(busno, &pci_root_ops, NULL);
46 pcibios_last_bus = -1;
48 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
50 static void __devinit pci_fixup_umc_ide(struct pci_dev *d)
53 * UM8886BF IDE controller sets region type bits incorrectly,
54 * therefore they look like memory despite of them being I/O.
58 printk(KERN_WARNING "PCI: Fixing base address flags for device %s\n", pci_name(d));
60 d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
62 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
64 static void __devinit pci_fixup_ncr53c810(struct pci_dev *d)
67 * NCR 53C810 returns class code 0 (at least on some systems).
68 * Fix class to be PCI_CLASS_STORAGE_SCSI
71 printk(KERN_WARNING "PCI: fixing NCR 53C810 class code for %s\n", pci_name(d));
72 d->class = PCI_CLASS_STORAGE_SCSI << 8;
75 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810);
77 static void __devinit pci_fixup_latency(struct pci_dev *d)
80 * SiS 5597 and 5598 chipsets require latency timer set to
81 * at most 32 to avoid lockups.
83 DBG("PCI: Setting max latency to 32\n");
84 pcibios_max_latency = 32;
86 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
87 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
89 static void __devinit pci_fixup_piix4_acpi(struct pci_dev *d)
92 * PIIX4 ACPI device: hardwired IRQ9
96 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
99 * Addresses issues with problems in the memory write queue timer in
100 * certain VIA Northbridges. This bugfix is per VIA's specifications,
101 * except for the KL133/KM133: clearing bit 5 on those Northbridges seems
102 * to trigger a bug in its integrated ProSavage video card, which
103 * causes screen corruption. We only clear bits 6 and 7 for that chipset,
104 * until VIA can provide us with definitive information on why screen
105 * corruption occurs, and what exactly those bits do.
107 * VIA 8363,8622,8361 Northbridges:
108 * - bits 5, 6, 7 at offset 0x55 need to be turned off
109 * VIA 8367 (KT266x) Northbridges:
110 * - bits 5, 6, 7 at offset 0x95 need to be turned off
111 * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
112 * - bits 6, 7 at offset 0x55 need to be turned off
115 #define VIA_8363_KL133_REVISION_ID 0x81
116 #define VIA_8363_KM133_REVISION_ID 0x84
118 static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
123 int mask = 0x1f; /* clear bits 5, 6, 7 by default */
125 pci_read_config_byte(d, PCI_REVISION_ID, &revision);
127 if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
128 /* fix pci bus latency issues resulted by NB bios error
129 it appears on bug free^Wreduced kt266x's bios forces
130 NB latency to zero */
131 pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
133 where = 0x95; /* the memory write queue timer register is
134 different for the KT266x's: 0x95 not 0x55 */
135 } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
136 (revision == VIA_8363_KL133_REVISION_ID ||
137 revision == VIA_8363_KM133_REVISION_ID)) {
138 mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
139 causes screen corruption on the KL133/KM133 */
142 pci_read_config_byte(d, where, &v);
144 printk(KERN_WARNING "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
145 d->device, revision, where, v, mask, v & mask);
147 pci_write_config_byte(d, where, v);
150 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
151 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
152 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
153 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
154 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
155 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
156 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
157 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
160 * For some reasons Intel decided that certain parts of their
161 * 815, 845 and some other chipsets must look like PCI-to-PCI bridges
162 * while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
163 * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
164 * to Intel terminology. These devices do forward all addresses from
165 * system to PCI bus no matter what are their window settings, so they are
166 * "transparent" (or subtractive decoding) from programmers point of view.
168 static void __devinit pci_fixup_transparent_bridge(struct pci_dev *dev)
170 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI &&
171 (dev->device & 0xff00) == 0x2400)
172 dev->transparent = 1;
174 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_fixup_transparent_bridge);
177 * Fixup for C1 Halt Disconnect problem on nForce2 systems.
179 * From information provided by "Allen Martin" <AMartin@nvidia.com>:
181 * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
182 * sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
183 * This allows the state-machine and timer to return to a proper state within
184 * 80 ns of the CONNECT and probe appearing together. Since the CPU will not
185 * issue another HALT within 80 ns of the initial HALT, the failure condition
188 static void pci_fixup_nforce2(struct pci_dev *dev)
193 * Chip Old value New value
194 * C17 0x1F0FFF01 0x1F01FF01
195 * C18D 0x9F0FFF01 0x9F01FF01
197 * Northbridge chip version may be determined by
198 * reading the PCI revision ID (0xC1 or greater is C18D).
200 pci_read_config_dword(dev, 0x6c, &val);
203 * Apply fixup if needed, but don't touch disconnect state
205 if ((val & 0x00FF0000) != 0x00010000) {
206 printk(KERN_WARNING "PCI: nForce2 C1 Halt Disconnect fixup\n");
207 pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
210 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
211 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
213 /* Max PCI Express root ports */
214 #define MAX_PCIEROOT 6
215 static int quirk_aspm_offset[MAX_PCIEROOT << 3];
217 #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
219 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
221 return raw_pci_ops->read(0, bus->number, devfn, where, size, value);
225 * Replace the original pci bus ops for write with a new one that will filter
226 * the request to insure ASPM cannot be enabled.
228 static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
232 offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
234 if ((offset) && (where == offset))
235 value = value & 0xfffffffc;
237 return raw_pci_ops->write(0, bus->number, 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 printk(KERN_DEBUG "Boot video device is %s\n", pci_name(pdev));
357 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);
360 * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
362 * We pretend to bring them out of full D3 state, and restore the proper
363 * IRQ, PCI cache line size, and BARs, otherwise the device won't function
364 * properly. In some cases, the device will generate an interrupt on
365 * the wrong IRQ line, causing any devices sharing the line it's
366 * *supposed* to use to be disabled by the kernel's IRQ debug code.
368 static u16 toshiba_line_size;
370 static struct dmi_system_id __devinitdata toshiba_ohci1394_dmi_table[] = {
372 .ident = "Toshiba PS5 based laptop",
374 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
375 DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
379 .ident = "Toshiba PSM4 based laptop",
381 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
382 DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
386 .ident = "Toshiba A40 based laptop",
388 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
389 DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
395 static void __devinit pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
397 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
398 return; /* only applies to certain Toshibas (so far) */
400 dev->current_state = PCI_D3cold;
401 pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
403 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
404 pci_pre_fixup_toshiba_ohci1394);
406 static void __devinit pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
408 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
409 return; /* only applies to certain Toshibas (so far) */
411 /* Restore config space on Toshiba laptops */
412 pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
413 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
414 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
415 pci_resource_start(dev, 0));
416 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
417 pci_resource_start(dev, 1));
419 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
420 pci_post_fixup_toshiba_ohci1394);
424 * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
425 * configuration space.
427 static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
430 /* clear 'F4 Video Configuration Trap' bit */
431 pci_read_config_byte(dev, 0x42, &r);
433 pci_write_config_byte(dev, 0x42, r);
435 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
436 pci_early_fixup_cyrix_5530);
437 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
438 pci_early_fixup_cyrix_5530);
441 * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
442 * prevent update of the BAR0, which doesn't look like a normal BAR.
444 static void __devinit pci_siemens_interrupt_controller(struct pci_dev *dev)
446 dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
448 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
449 pci_siemens_interrupt_controller);