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_ide_bases(struct pci_dev *d)
82 * PCI IDE controllers use non-standard I/O port decoding, respect it.
84 if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
86 DBG("PCI: IDE base address fixup for %s\n", pci_name(d));
88 struct resource *r = &d->resource[i];
89 if ((r->start & ~0x80) == 0x374) {
95 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases);
97 static void __devinit pci_fixup_ide_trash(struct pci_dev *d)
102 * Runs the fixup only for the first IDE controller
103 * (Shai Fultheim - shai@ftcon.com)
105 static int called = 0;
111 * There exist PCI IDE controllers which have utter garbage
112 * in first four base registers. Ignore that.
114 DBG("PCI: IDE base address trash cleared for %s\n", pci_name(d));
116 d->resource[i].start = d->resource[i].end = d->resource[i].flags = 0;
118 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, pci_fixup_ide_trash);
119 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, pci_fixup_ide_trash);
120 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_11, pci_fixup_ide_trash);
121 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_9, pci_fixup_ide_trash);
123 static void __devinit pci_fixup_latency(struct pci_dev *d)
126 * SiS 5597 and 5598 chipsets require latency timer set to
127 * at most 32 to avoid lockups.
129 DBG("PCI: Setting max latency to 32\n");
130 pcibios_max_latency = 32;
132 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
133 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
135 static void __devinit pci_fixup_piix4_acpi(struct pci_dev *d)
138 * PIIX4 ACPI device: hardwired IRQ9
142 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
145 * Addresses issues with problems in the memory write queue timer in
146 * certain VIA Northbridges. This bugfix is per VIA's specifications,
147 * except for the KL133/KM133: clearing bit 5 on those Northbridges seems
148 * to trigger a bug in its integrated ProSavage video card, which
149 * causes screen corruption. We only clear bits 6 and 7 for that chipset,
150 * until VIA can provide us with definitive information on why screen
151 * corruption occurs, and what exactly those bits do.
153 * VIA 8363,8622,8361 Northbridges:
154 * - bits 5, 6, 7 at offset 0x55 need to be turned off
155 * VIA 8367 (KT266x) Northbridges:
156 * - bits 5, 6, 7 at offset 0x95 need to be turned off
157 * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
158 * - bits 6, 7 at offset 0x55 need to be turned off
161 #define VIA_8363_KL133_REVISION_ID 0x81
162 #define VIA_8363_KM133_REVISION_ID 0x84
164 static void __devinit pci_fixup_via_northbridge_bug(struct pci_dev *d)
169 int mask = 0x1f; /* clear bits 5, 6, 7 by default */
171 pci_read_config_byte(d, PCI_REVISION_ID, &revision);
173 if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
174 /* fix pci bus latency issues resulted by NB bios error
175 it appears on bug free^Wreduced kt266x's bios forces
176 NB latency to zero */
177 pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
179 where = 0x95; /* the memory write queue timer register is
180 different for the KT266x's: 0x95 not 0x55 */
181 } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
182 (revision == VIA_8363_KL133_REVISION_ID ||
183 revision == VIA_8363_KM133_REVISION_ID)) {
184 mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
185 causes screen corruption on the KL133/KM133 */
188 pci_read_config_byte(d, where, &v);
190 printk(KERN_WARNING "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
191 d->device, revision, where, v, mask, v & mask);
193 pci_write_config_byte(d, where, v);
196 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
197 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
198 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
199 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
202 * For some reasons Intel decided that certain parts of their
203 * 815, 845 and some other chipsets must look like PCI-to-PCI bridges
204 * while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
205 * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
206 * to Intel terminology. These devices do forward all addresses from
207 * system to PCI bus no matter what are their window settings, so they are
208 * "transparent" (or subtractive decoding) from programmers point of view.
210 static void __devinit pci_fixup_transparent_bridge(struct pci_dev *dev)
212 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI &&
213 (dev->device & 0xff00) == 0x2400)
214 dev->transparent = 1;
216 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_fixup_transparent_bridge);
219 * Fixup for C1 Halt Disconnect problem on nForce2 systems.
221 * From information provided by "Allen Martin" <AMartin@nvidia.com>:
223 * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
224 * sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
225 * This allows the state-machine and timer to return to a proper state within
226 * 80 ns of the CONNECT and probe appearing together. Since the CPU will not
227 * issue another HALT within 80 ns of the initial HALT, the failure condition
230 static void __init pci_fixup_nforce2(struct pci_dev *dev)
235 * Chip Old value New value
236 * C17 0x1F0FFF01 0x1F01FF01
237 * C18D 0x9F0FFF01 0x9F01FF01
239 * Northbridge chip version may be determined by
240 * reading the PCI revision ID (0xC1 or greater is C18D).
242 pci_read_config_dword(dev, 0x6c, &val);
245 * Apply fixup if needed, but don't touch disconnect state
247 if ((val & 0x00FF0000) != 0x00010000) {
248 printk(KERN_WARNING "PCI: nForce2 C1 Halt Disconnect fixup\n");
249 pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
252 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
254 /* Max PCI Express root ports */
255 #define MAX_PCIEROOT 6
256 static int quirk_aspm_offset[MAX_PCIEROOT << 3];
258 #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
260 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
262 return raw_pci_ops->read(0, bus->number, devfn, where, size, value);
266 * Replace the original pci bus ops for write with a new one that will filter
267 * the request to insure ASPM cannot be enabled.
269 static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
273 offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
275 if ((offset) && (where == offset))
276 value = value & 0xfffffffc;
278 return raw_pci_ops->write(0, bus->number, devfn, where, size, value);
281 static struct pci_ops quirk_pcie_aspm_ops = {
282 .read = quirk_pcie_aspm_read,
283 .write = quirk_pcie_aspm_write,
287 * Prevents PCI Express ASPM (Active State Power Management) being enabled.
289 * Save the register offset, where the ASPM control bits are located,
290 * for each PCI Express device that is in the device list of
291 * the root port in an array for fast indexing. Replace the bus ops
292 * with the modified one.
294 static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
297 struct pci_bus *pbus;
300 if ((pbus = pdev->subordinate) == NULL)
304 * Check if the DID of pdev matches one of the six root ports. This
305 * check is needed in the case this function is called directly by the
308 if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
309 (pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
312 if (list_empty(&pbus->devices)) {
314 * If no device is attached to the root port at power-up or
315 * after hot-remove, the pbus->devices is empty and this code
316 * will set the offsets to zero and the bus ops to parent's bus
317 * ops, which is unmodified.
319 for (i= GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
320 quirk_aspm_offset[i] = 0;
322 pbus->ops = pbus->parent->ops;
325 * If devices are attached to the root port at power-up or
326 * after hot-add, the code loops through the device list of
327 * each root port to save the register offsets and replace the
330 list_for_each_entry(dev, &pbus->devices, bus_list) {
331 /* There are 0 to 8 devices attached to this bus */
332 cap_base = pci_find_capability(dev, PCI_CAP_ID_EXP);
333 quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)]= cap_base + 0x10;
335 pbus->ops = &quirk_pcie_aspm_ops;
338 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk );
339 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk );
340 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB, pcie_rootport_aspm_quirk );
341 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_rootport_aspm_quirk );
342 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk );
343 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk );
346 * Fixup to mark boot BIOS video selected by BIOS before it changes
348 * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
350 * The standard boot ROM sequence for an x86 machine uses the BIOS
351 * to select an initial video card for boot display. This boot video
352 * card will have it's BIOS copied to C0000 in system RAM.
353 * IORESOURCE_ROM_SHADOW is used to associate the boot video
354 * card with this copy. On laptops this copy has to be used since
355 * the main ROM may be compressed or combined with another image.
356 * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
357 * is marked here since the boot video device will be the only enabled
358 * video device at this point.
361 static void __devinit pci_fixup_video(struct pci_dev *pdev)
363 struct pci_dev *bridge;
367 if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
370 /* Is VGA routed to us? */
375 pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
377 if (!(config & PCI_BRIDGE_CTL_VGA))
382 pci_read_config_word(pdev, PCI_COMMAND, &config);
383 if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
384 pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
385 printk(KERN_DEBUG "Boot video device is %s\n", pci_name(pdev));
388 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);
391 * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
393 * We pretend to bring them out of full D3 state, and restore the proper
394 * IRQ, PCI cache line size, and BARs, otherwise the device won't function
395 * properly. In some cases, the device will generate an interrupt on
396 * the wrong IRQ line, causing any devices sharing the the line it's
397 * *supposed* to use to be disabled by the kernel's IRQ debug code.
399 static u16 toshiba_line_size;
401 static struct dmi_system_id __devinitdata toshiba_ohci1394_dmi_table[] = {
403 .ident = "Toshiba PS5 based laptop",
405 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
406 DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
410 .ident = "Toshiba PSM4 based laptop",
412 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
413 DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
419 static void __devinit pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
421 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
422 return; /* only applies to certain Toshibas (so far) */
424 dev->current_state = PCI_D3cold;
425 pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
427 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
428 pci_pre_fixup_toshiba_ohci1394);
430 static void __devinit pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
432 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
433 return; /* only applies to certain Toshibas (so far) */
435 /* Restore config space on Toshiba laptops */
436 pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
437 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
438 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
439 pci_resource_start(dev, 0));
440 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
441 pci_resource_start(dev, 1));
443 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
444 pci_post_fixup_toshiba_ohci1394);