1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Exceptions for specific devices. Usually work-arounds for fatal design flaws.
4 */
5
6 #include <linux/bitfield.h>
7 #include <linux/delay.h>
8 #include <linux/dmi.h>
9 #include <linux/pci.h>
10 #include <linux/suspend.h>
11 #include <linux/vgaarb.h>
12 #include <asm/amd_nb.h>
13 #include <asm/hpet.h>
14 #include <asm/pci_x86.h>
15
pci_fixup_i450nx(struct pci_dev * d)16 static void pci_fixup_i450nx(struct pci_dev *d)
17 {
18 /*
19 * i450NX -- Find and scan all secondary buses on all PXB's.
20 */
21 int pxb, reg;
22 u8 busno, suba, subb;
23
24 dev_warn(&d->dev, "Searching for i450NX host bridges\n");
25 reg = 0xd0;
26 for(pxb = 0; pxb < 2; pxb++) {
27 pci_read_config_byte(d, reg++, &busno);
28 pci_read_config_byte(d, reg++, &suba);
29 pci_read_config_byte(d, reg++, &subb);
30 dev_dbg(&d->dev, "i450NX PXB %d: %02x/%02x/%02x\n", pxb, busno,
31 suba, subb);
32 if (busno)
33 pcibios_scan_root(busno); /* Bus A */
34 if (suba < subb)
35 pcibios_scan_root(suba+1); /* Bus B */
36 }
37 pcibios_last_bus = -1;
38 }
39 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx);
40
pci_fixup_i450gx(struct pci_dev * d)41 static void pci_fixup_i450gx(struct pci_dev *d)
42 {
43 /*
44 * i450GX and i450KX -- Find and scan all secondary buses.
45 * (called separately for each PCI bridge found)
46 */
47 u8 busno;
48 pci_read_config_byte(d, 0x4a, &busno);
49 dev_info(&d->dev, "i440KX/GX host bridge; secondary bus %02x\n", busno);
50 pcibios_scan_root(busno);
51 pcibios_last_bus = -1;
52 }
53 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx);
54
pci_fixup_umc_ide(struct pci_dev * d)55 static void pci_fixup_umc_ide(struct pci_dev *d)
56 {
57 /*
58 * UM8886BF IDE controller sets region type bits incorrectly,
59 * therefore they look like memory despite of them being I/O.
60 */
61 int i;
62
63 dev_warn(&d->dev, "Fixing base address flags\n");
64 for(i = 0; i < 4; i++)
65 d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO;
66 }
67 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide);
68
pci_fixup_latency(struct pci_dev * d)69 static void pci_fixup_latency(struct pci_dev *d)
70 {
71 /*
72 * SiS 5597 and 5598 chipsets require latency timer set to
73 * at most 32 to avoid lockups.
74 */
75 dev_dbg(&d->dev, "Setting max latency to 32\n");
76 pcibios_max_latency = 32;
77 }
78 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency);
79 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency);
80
pci_fixup_piix4_acpi(struct pci_dev * d)81 static void pci_fixup_piix4_acpi(struct pci_dev *d)
82 {
83 /*
84 * PIIX4 ACPI device: hardwired IRQ9
85 */
86 d->irq = 9;
87 }
88 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, pci_fixup_piix4_acpi);
89
90 /*
91 * Addresses issues with problems in the memory write queue timer in
92 * certain VIA Northbridges. This bugfix is per VIA's specifications,
93 * except for the KL133/KM133: clearing bit 5 on those Northbridges seems
94 * to trigger a bug in its integrated ProSavage video card, which
95 * causes screen corruption. We only clear bits 6 and 7 for that chipset,
96 * until VIA can provide us with definitive information on why screen
97 * corruption occurs, and what exactly those bits do.
98 *
99 * VIA 8363,8622,8361 Northbridges:
100 * - bits 5, 6, 7 at offset 0x55 need to be turned off
101 * VIA 8367 (KT266x) Northbridges:
102 * - bits 5, 6, 7 at offset 0x95 need to be turned off
103 * VIA 8363 rev 0x81/0x84 (KL133/KM133) Northbridges:
104 * - bits 6, 7 at offset 0x55 need to be turned off
105 */
106
107 #define VIA_8363_KL133_REVISION_ID 0x81
108 #define VIA_8363_KM133_REVISION_ID 0x84
109
pci_fixup_via_northbridge_bug(struct pci_dev * d)110 static void pci_fixup_via_northbridge_bug(struct pci_dev *d)
111 {
112 u8 v;
113 int where = 0x55;
114 int mask = 0x1f; /* clear bits 5, 6, 7 by default */
115
116 if (d->device == PCI_DEVICE_ID_VIA_8367_0) {
117 /* fix pci bus latency issues resulted by NB bios error
118 it appears on bug free^Wreduced kt266x's bios forces
119 NB latency to zero */
120 pci_write_config_byte(d, PCI_LATENCY_TIMER, 0);
121
122 where = 0x95; /* the memory write queue timer register is
123 different for the KT266x's: 0x95 not 0x55 */
124 } else if (d->device == PCI_DEVICE_ID_VIA_8363_0 &&
125 (d->revision == VIA_8363_KL133_REVISION_ID ||
126 d->revision == VIA_8363_KM133_REVISION_ID)) {
127 mask = 0x3f; /* clear only bits 6 and 7; clearing bit 5
128 causes screen corruption on the KL133/KM133 */
129 }
130
131 pci_read_config_byte(d, where, &v);
132 if (v & ~mask) {
133 dev_warn(&d->dev, "Disabling VIA memory write queue (PCI ID %04x, rev %02x): [%02x] %02x & %02x -> %02x\n", \
134 d->device, d->revision, where, v, mask, v & mask);
135 v &= mask;
136 pci_write_config_byte(d, where, v);
137 }
138 }
139 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
140 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
141 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
142 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
143 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, pci_fixup_via_northbridge_bug);
144 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8622, pci_fixup_via_northbridge_bug);
145 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, pci_fixup_via_northbridge_bug);
146 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, pci_fixup_via_northbridge_bug);
147
148 /*
149 * For some reasons Intel decided that certain parts of their
150 * 815, 845 and some other chipsets must look like PCI-to-PCI bridges
151 * while they are obviously not. The 82801 family (AA, AB, BAM/CAM,
152 * BA/CA/DB and E) PCI bridges are actually HUB-to-PCI ones, according
153 * to Intel terminology. These devices do forward all addresses from
154 * system to PCI bus no matter what are their window settings, so they are
155 * "transparent" (or subtractive decoding) from programmers point of view.
156 */
pci_fixup_transparent_bridge(struct pci_dev * dev)157 static void pci_fixup_transparent_bridge(struct pci_dev *dev)
158 {
159 if ((dev->device & 0xff00) == 0x2400)
160 dev->transparent = 1;
161 }
162 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
163 PCI_CLASS_BRIDGE_PCI, 8, pci_fixup_transparent_bridge);
164
165 /*
166 * Fixup for C1 Halt Disconnect problem on nForce2 systems.
167 *
168 * From information provided by "Allen Martin" <AMartin@nvidia.com>:
169 *
170 * A hang is caused when the CPU generates a very fast CONNECT/HALT cycle
171 * sequence. Workaround is to set the SYSTEM_IDLE_TIMEOUT to 80 ns.
172 * This allows the state-machine and timer to return to a proper state within
173 * 80 ns of the CONNECT and probe appearing together. Since the CPU will not
174 * issue another HALT within 80 ns of the initial HALT, the failure condition
175 * is avoided.
176 */
pci_fixup_nforce2(struct pci_dev * dev)177 static void pci_fixup_nforce2(struct pci_dev *dev)
178 {
179 u32 val;
180
181 /*
182 * Chip Old value New value
183 * C17 0x1F0FFF01 0x1F01FF01
184 * C18D 0x9F0FFF01 0x9F01FF01
185 *
186 * Northbridge chip version may be determined by
187 * reading the PCI revision ID (0xC1 or greater is C18D).
188 */
189 pci_read_config_dword(dev, 0x6c, &val);
190
191 /*
192 * Apply fixup if needed, but don't touch disconnect state
193 */
194 if ((val & 0x00FF0000) != 0x00010000) {
195 dev_warn(&dev->dev, "nForce2 C1 Halt Disconnect fixup\n");
196 pci_write_config_dword(dev, 0x6c, (val & 0xFF00FFFF) | 0x00010000);
197 }
198 }
199 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
200 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2, pci_fixup_nforce2);
201
202 /* Max PCI Express root ports */
203 #define MAX_PCIEROOT 6
204 static int quirk_aspm_offset[MAX_PCIEROOT << 3];
205
206 #define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
207
quirk_pcie_aspm_read(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 * value)208 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
209 {
210 return raw_pci_read(pci_domain_nr(bus), bus->number,
211 devfn, where, size, value);
212 }
213
214 /*
215 * Replace the original pci bus ops for write with a new one that will filter
216 * the request to insure ASPM cannot be enabled.
217 */
quirk_pcie_aspm_write(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 value)218 static int quirk_pcie_aspm_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
219 {
220 u8 offset;
221
222 offset = quirk_aspm_offset[GET_INDEX(bus->self->device, devfn)];
223
224 if ((offset) && (where == offset))
225 value = value & ~PCI_EXP_LNKCTL_ASPMC;
226
227 return raw_pci_write(pci_domain_nr(bus), bus->number,
228 devfn, where, size, value);
229 }
230
231 static struct pci_ops quirk_pcie_aspm_ops = {
232 .read = quirk_pcie_aspm_read,
233 .write = quirk_pcie_aspm_write,
234 };
235
236 /*
237 * Prevents PCI Express ASPM (Active State Power Management) being enabled.
238 *
239 * Save the register offset, where the ASPM control bits are located,
240 * for each PCI Express device that is in the device list of
241 * the root port in an array for fast indexing. Replace the bus ops
242 * with the modified one.
243 */
pcie_rootport_aspm_quirk(struct pci_dev * pdev)244 static void pcie_rootport_aspm_quirk(struct pci_dev *pdev)
245 {
246 int i;
247 struct pci_bus *pbus;
248 struct pci_dev *dev;
249
250 if ((pbus = pdev->subordinate) == NULL)
251 return;
252
253 /*
254 * Check if the DID of pdev matches one of the six root ports. This
255 * check is needed in the case this function is called directly by the
256 * hot-plug driver.
257 */
258 if ((pdev->device < PCI_DEVICE_ID_INTEL_MCH_PA) ||
259 (pdev->device > PCI_DEVICE_ID_INTEL_MCH_PC1))
260 return;
261
262 if (list_empty(&pbus->devices)) {
263 /*
264 * If no device is attached to the root port at power-up or
265 * after hot-remove, the pbus->devices is empty and this code
266 * will set the offsets to zero and the bus ops to parent's bus
267 * ops, which is unmodified.
268 */
269 for (i = GET_INDEX(pdev->device, 0); i <= GET_INDEX(pdev->device, 7); ++i)
270 quirk_aspm_offset[i] = 0;
271
272 pci_bus_set_ops(pbus, pbus->parent->ops);
273 } else {
274 /*
275 * If devices are attached to the root port at power-up or
276 * after hot-add, the code loops through the device list of
277 * each root port to save the register offsets and replace the
278 * bus ops.
279 */
280 list_for_each_entry(dev, &pbus->devices, bus_list)
281 /* There are 0 to 8 devices attached to this bus */
282 quirk_aspm_offset[GET_INDEX(pdev->device, dev->devfn)] =
283 dev->pcie_cap + PCI_EXP_LNKCTL;
284
285 pci_bus_set_ops(pbus, &quirk_pcie_aspm_ops);
286 dev_info(&pbus->dev, "writes to ASPM control bits will be ignored\n");
287 }
288
289 }
290 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA, pcie_rootport_aspm_quirk);
291 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PA1, pcie_rootport_aspm_quirk);
292 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB, pcie_rootport_aspm_quirk);
293 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PB1, pcie_rootport_aspm_quirk);
294 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC, pcie_rootport_aspm_quirk);
295 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk);
296
297 /*
298 * Fixup to mark boot BIOS video selected by BIOS before it changes
299 *
300 * From information provided by "Jon Smirl" <jonsmirl@gmail.com>
301 *
302 * The standard boot ROM sequence for an x86 machine uses the BIOS
303 * to select an initial video card for boot display. This boot video
304 * card will have its BIOS copied to 0xC0000 in system RAM.
305 * IORESOURCE_ROM_SHADOW is used to associate the boot video
306 * card with this copy. On laptops this copy has to be used since
307 * the main ROM may be compressed or combined with another image.
308 * See pci_map_rom() for use of this flag. Before marking the device
309 * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set
310 * by either arch code or vga-arbitration; if so only apply the fixup to this
311 * already-determined primary video card.
312 */
313
pci_fixup_video(struct pci_dev * pdev)314 static void pci_fixup_video(struct pci_dev *pdev)
315 {
316 struct pci_dev *bridge;
317 struct pci_bus *bus;
318 u16 config;
319 struct resource *res;
320
321 /* Is VGA routed to us? */
322 bus = pdev->bus;
323 while (bus) {
324 bridge = bus->self;
325
326 /*
327 * From information provided by
328 * "David Miller" <davem@davemloft.net>
329 * The bridge control register is valid for PCI header
330 * type BRIDGE, or CARDBUS. Host to PCI controllers use
331 * PCI header type NORMAL.
332 */
333 if (bridge && (pci_is_bridge(bridge))) {
334 pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
335 &config);
336 if (!(config & PCI_BRIDGE_CTL_VGA))
337 return;
338 }
339 bus = bus->parent;
340 }
341 if (!vga_default_device() || pdev == vga_default_device()) {
342 pci_read_config_word(pdev, PCI_COMMAND, &config);
343 if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
344 res = &pdev->resource[PCI_ROM_RESOURCE];
345
346 pci_disable_rom(pdev);
347 if (res->parent)
348 release_resource(res);
349
350 res->start = 0xC0000;
351 res->end = res->start + 0x20000 - 1;
352 res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
353 IORESOURCE_PCI_FIXED;
354 dev_info(&pdev->dev, "Video device with shadowed ROM at %pR\n",
355 res);
356 }
357 }
358 }
359 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID,
360 PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);
361
362
363 static const struct dmi_system_id msi_k8t_dmi_table[] = {
364 {
365 .ident = "MSI-K8T-Neo2Fir",
366 .matches = {
367 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
368 DMI_MATCH(DMI_PRODUCT_NAME, "MS-6702E"),
369 },
370 },
371 {}
372 };
373
374 /*
375 * The AMD-Athlon64 board MSI "K8T Neo2-FIR" disables the onboard sound
376 * card if a PCI-soundcard is added.
377 *
378 * The BIOS only gives options "DISABLED" and "AUTO". This code sets
379 * the corresponding register-value to enable the soundcard.
380 *
381 * The soundcard is only enabled, if the mainboard is identified
382 * via DMI-tables and the soundcard is detected to be off.
383 */
pci_fixup_msi_k8t_onboard_sound(struct pci_dev * dev)384 static void pci_fixup_msi_k8t_onboard_sound(struct pci_dev *dev)
385 {
386 unsigned char val;
387 if (!dmi_check_system(msi_k8t_dmi_table))
388 return; /* only applies to MSI K8T Neo2-FIR */
389
390 pci_read_config_byte(dev, 0x50, &val);
391 if (val & 0x40) {
392 pci_write_config_byte(dev, 0x50, val & (~0x40));
393
394 /* verify the change for status output */
395 pci_read_config_byte(dev, 0x50, &val);
396 if (val & 0x40)
397 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
398 "can't enable onboard soundcard!\n");
399 else
400 dev_info(&dev->dev, "Detected MSI K8T Neo2-FIR; "
401 "enabled onboard soundcard\n");
402 }
403 }
404 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
405 pci_fixup_msi_k8t_onboard_sound);
406 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237,
407 pci_fixup_msi_k8t_onboard_sound);
408
409 /*
410 * Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
411 *
412 * We pretend to bring them out of full D3 state, and restore the proper
413 * IRQ, PCI cache line size, and BARs, otherwise the device won't function
414 * properly. In some cases, the device will generate an interrupt on
415 * the wrong IRQ line, causing any devices sharing the line it's
416 * *supposed* to use to be disabled by the kernel's IRQ debug code.
417 */
418 static u16 toshiba_line_size;
419
420 static const struct dmi_system_id toshiba_ohci1394_dmi_table[] = {
421 {
422 .ident = "Toshiba PS5 based laptop",
423 .matches = {
424 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
425 DMI_MATCH(DMI_PRODUCT_VERSION, "PS5"),
426 },
427 },
428 {
429 .ident = "Toshiba PSM4 based laptop",
430 .matches = {
431 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
432 DMI_MATCH(DMI_PRODUCT_VERSION, "PSM4"),
433 },
434 },
435 {
436 .ident = "Toshiba A40 based laptop",
437 .matches = {
438 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
439 DMI_MATCH(DMI_PRODUCT_VERSION, "PSA40U"),
440 },
441 },
442 { }
443 };
444
pci_pre_fixup_toshiba_ohci1394(struct pci_dev * dev)445 static void pci_pre_fixup_toshiba_ohci1394(struct pci_dev *dev)
446 {
447 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
448 return; /* only applies to certain Toshibas (so far) */
449
450 dev->current_state = PCI_D3cold;
451 pci_read_config_word(dev, PCI_CACHE_LINE_SIZE, &toshiba_line_size);
452 }
453 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0x8032,
454 pci_pre_fixup_toshiba_ohci1394);
455
pci_post_fixup_toshiba_ohci1394(struct pci_dev * dev)456 static void pci_post_fixup_toshiba_ohci1394(struct pci_dev *dev)
457 {
458 if (!dmi_check_system(toshiba_ohci1394_dmi_table))
459 return; /* only applies to certain Toshibas (so far) */
460
461 /* Restore config space on Toshiba laptops */
462 pci_write_config_word(dev, PCI_CACHE_LINE_SIZE, toshiba_line_size);
463 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, (u8 *)&dev->irq);
464 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
465 pci_resource_start(dev, 0));
466 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1,
467 pci_resource_start(dev, 1));
468 }
469 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_TI, 0x8032,
470 pci_post_fixup_toshiba_ohci1394);
471
472
473 /*
474 * Prevent the BIOS trapping accesses to the Cyrix CS5530A video device
475 * configuration space.
476 */
pci_early_fixup_cyrix_5530(struct pci_dev * dev)477 static void pci_early_fixup_cyrix_5530(struct pci_dev *dev)
478 {
479 u8 r;
480 /* clear 'F4 Video Configuration Trap' bit */
481 pci_read_config_byte(dev, 0x42, &r);
482 r &= 0xfd;
483 pci_write_config_byte(dev, 0x42, r);
484 }
485 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
486 pci_early_fixup_cyrix_5530);
487 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
488 pci_early_fixup_cyrix_5530);
489
490 /*
491 * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller:
492 * prevent update of the BAR0, which doesn't look like a normal BAR.
493 */
pci_siemens_interrupt_controller(struct pci_dev * dev)494 static void pci_siemens_interrupt_controller(struct pci_dev *dev)
495 {
496 dev->resource[0].flags |= IORESOURCE_PCI_FIXED;
497 }
498 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
499 pci_siemens_interrupt_controller);
500
501 /*
502 * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
503 * confusing the PCI engine:
504 */
sb600_disable_hpet_bar(struct pci_dev * dev)505 static void sb600_disable_hpet_bar(struct pci_dev *dev)
506 {
507 u8 val;
508
509 /*
510 * The SB600 and SB700 both share the same device
511 * ID, but the PM register 0x55 does something different
512 * for the SB700, so make sure we are dealing with the
513 * SB600 before touching the bit:
514 */
515
516 pci_read_config_byte(dev, 0x08, &val);
517
518 if (val < 0x2F) {
519 outb(0x55, 0xCD6);
520 val = inb(0xCD7);
521
522 /* Set bit 7 in PM register 0x55 */
523 outb(0x55, 0xCD6);
524 outb(val | 0x80, 0xCD7);
525 }
526 }
527 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
528
529 #ifdef CONFIG_HPET_TIMER
sb600_hpet_quirk(struct pci_dev * dev)530 static void sb600_hpet_quirk(struct pci_dev *dev)
531 {
532 struct resource *r = &dev->resource[1];
533
534 if (r->flags & IORESOURCE_MEM && r->start == hpet_address) {
535 r->flags |= IORESOURCE_PCI_FIXED;
536 dev_info(&dev->dev, "reg 0x14 contains HPET; making it immovable\n");
537 }
538 }
539 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, 0x4385, sb600_hpet_quirk);
540 #endif
541
542 /*
543 * Twinhead H12Y needs us to block out a region otherwise we map devices
544 * there and any access kills the box.
545 *
546 * See: https://bugzilla.kernel.org/show_bug.cgi?id=10231
547 *
548 * Match off the LPC and svid/sdid (older kernels lose the bridge subvendor)
549 */
twinhead_reserve_killing_zone(struct pci_dev * dev)550 static void twinhead_reserve_killing_zone(struct pci_dev *dev)
551 {
552 if (dev->subsystem_vendor == 0x14FF && dev->subsystem_device == 0xA003) {
553 pr_info("Reserving memory on Twinhead H12Y\n");
554 request_mem_region(0xFFB00000, 0x100000, "twinhead");
555 }
556 }
557 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone);
558
559 /*
560 * Device [8086:2fc0]
561 * Erratum HSE43
562 * CONFIG_TDP_NOMINAL CSR Implemented at Incorrect Offset
563 * https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v3-spec-update.html
564 *
565 * Devices [8086:6f60,6fa0,6fc0]
566 * Erratum BDF2
567 * PCI BARs in the Home Agent Will Return Non-Zero Values During Enumeration
568 * https://www.intel.com/content/www/us/en/processors/xeon/xeon-e5-v4-spec-update.html
569 */
pci_invalid_bar(struct pci_dev * dev)570 static void pci_invalid_bar(struct pci_dev *dev)
571 {
572 dev->non_compliant_bars = 1;
573 }
574 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2fc0, pci_invalid_bar);
575 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6f60, pci_invalid_bar);
576 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_invalid_bar);
577 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_invalid_bar);
578 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ec, pci_invalid_bar);
579 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa1ed, pci_invalid_bar);
580 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26c, pci_invalid_bar);
581 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0xa26d, pci_invalid_bar);
582
583 /*
584 * Device [1022:7808]
585 * 23. USB Wake on Connect/Disconnect with Low Speed Devices
586 * https://support.amd.com/TechDocs/46837.pdf
587 * Appendix A2
588 * https://support.amd.com/TechDocs/42413.pdf
589 */
pci_fixup_amd_ehci_pme(struct pci_dev * dev)590 static void pci_fixup_amd_ehci_pme(struct pci_dev *dev)
591 {
592 dev_info(&dev->dev, "PME# does not work under D3, disabling it\n");
593 dev->pme_support &= ~((PCI_PM_CAP_PME_D3hot | PCI_PM_CAP_PME_D3cold)
594 >> PCI_PM_CAP_PME_SHIFT);
595 }
596 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7808, pci_fixup_amd_ehci_pme);
597
598 /*
599 * Device [1022:7914]
600 * When in D0, PME# doesn't get asserted when plugging USB 2.0 device.
601 */
pci_fixup_amd_fch_xhci_pme(struct pci_dev * dev)602 static void pci_fixup_amd_fch_xhci_pme(struct pci_dev *dev)
603 {
604 dev_info(&dev->dev, "PME# does not work under D0, disabling it\n");
605 dev->pme_support &= ~(PCI_PM_CAP_PME_D0 >> PCI_PM_CAP_PME_SHIFT);
606 }
607 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x7914, pci_fixup_amd_fch_xhci_pme);
608
609 /*
610 * Apple MacBook Pro: Avoid [mem 0x7fa00000-0x7fbfffff]
611 *
612 * Using the [mem 0x7fa00000-0x7fbfffff] region, e.g., by assigning it to
613 * the 00:1c.0 Root Port, causes a conflict with [io 0x1804], which is used
614 * for soft poweroff and suspend-to-RAM.
615 *
616 * As far as we know, this is related to the address space, not to the Root
617 * Port itself. Attaching the quirk to the Root Port is a convenience, but
618 * it could probably also be a standalone DMI quirk.
619 *
620 * https://bugzilla.kernel.org/show_bug.cgi?id=103211
621 */
quirk_apple_mbp_poweroff(struct pci_dev * pdev)622 static void quirk_apple_mbp_poweroff(struct pci_dev *pdev)
623 {
624 struct device *dev = &pdev->dev;
625 struct resource *res;
626
627 if ((!dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,4") &&
628 !dmi_match(DMI_PRODUCT_NAME, "MacBookPro11,5")) ||
629 pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x1c, 0))
630 return;
631
632 res = request_mem_region(0x7fa00000, 0x200000,
633 "MacBook Pro poweroff workaround");
634 if (res)
635 dev_info(dev, "claimed %s %pR\n", res->name, res);
636 else
637 dev_info(dev, "can't work around MacBook Pro poweroff issue\n");
638 }
639 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x8c10, quirk_apple_mbp_poweroff);
640
641 /*
642 * VMD-enabled root ports will change the source ID for all messages
643 * to the VMD device. Rather than doing device matching with the source
644 * ID, the AER driver should traverse the child device tree, reading
645 * AER registers to find the faulting device.
646 */
quirk_no_aersid(struct pci_dev * pdev)647 static void quirk_no_aersid(struct pci_dev *pdev)
648 {
649 /* VMD Domain */
650 if (is_vmd(pdev->bus) && pci_is_root_bus(pdev->bus))
651 pdev->bus->bus_flags |= PCI_BUS_FLAGS_NO_AERSID;
652 }
653 DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
654 PCI_CLASS_BRIDGE_PCI, 8, quirk_no_aersid);
655
quirk_intel_th_dnv(struct pci_dev * dev)656 static void quirk_intel_th_dnv(struct pci_dev *dev)
657 {
658 struct resource *r = &dev->resource[4];
659
660 /*
661 * Denverton reports 2k of RTIT_BAR (intel_th resource 4), which
662 * appears to be 4 MB in reality.
663 */
664 if (r->end == r->start + 0x7ff) {
665 r->start = 0;
666 r->end = 0x3fffff;
667 r->flags |= IORESOURCE_UNSET;
668 }
669 }
670 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x19e1, quirk_intel_th_dnv);
671
672 #ifdef CONFIG_PHYS_ADDR_T_64BIT
673
674 #define AMD_141b_MMIO_BASE(x) (0x80 + (x) * 0x8)
675 #define AMD_141b_MMIO_BASE_RE_MASK BIT(0)
676 #define AMD_141b_MMIO_BASE_WE_MASK BIT(1)
677 #define AMD_141b_MMIO_BASE_MMIOBASE_MASK GENMASK(31,8)
678
679 #define AMD_141b_MMIO_LIMIT(x) (0x84 + (x) * 0x8)
680 #define AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK GENMASK(31,8)
681
682 #define AMD_141b_MMIO_HIGH(x) (0x180 + (x) * 0x4)
683 #define AMD_141b_MMIO_HIGH_MMIOBASE_MASK GENMASK(7,0)
684 #define AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT 16
685 #define AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK GENMASK(23,16)
686
687 /*
688 * The PCI Firmware Spec, rev 3.2, notes that ACPI should optionally allow
689 * configuring host bridge windows using the _PRS and _SRS methods.
690 *
691 * But this is rarely implemented, so we manually enable a large 64bit BAR for
692 * PCIe device on AMD Family 15h (Models 00h-1fh, 30h-3fh, 60h-7fh) Processors
693 * here.
694 */
pci_amd_enable_64bit_bar(struct pci_dev * dev)695 static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
696 {
697 static const char *name = "PCI Bus 0000:00";
698 struct resource *res, *conflict;
699 u32 base, limit, high;
700 struct pci_dev *other;
701 unsigned i;
702
703 if (!(pci_probe & PCI_BIG_ROOT_WINDOW))
704 return;
705
706 /* Check that we are the only device of that type */
707 other = pci_get_device(dev->vendor, dev->device, NULL);
708 if (other != dev ||
709 (other = pci_get_device(dev->vendor, dev->device, other))) {
710 /* This is a multi-socket system, don't touch it for now */
711 pci_dev_put(other);
712 return;
713 }
714
715 for (i = 0; i < 8; i++) {
716 pci_read_config_dword(dev, AMD_141b_MMIO_BASE(i), &base);
717 pci_read_config_dword(dev, AMD_141b_MMIO_HIGH(i), &high);
718
719 /* Is this slot free? */
720 if (!(base & (AMD_141b_MMIO_BASE_RE_MASK |
721 AMD_141b_MMIO_BASE_WE_MASK)))
722 break;
723
724 base >>= 8;
725 base |= high << 24;
726
727 /* Abort if a slot already configures a 64bit BAR. */
728 if (base > 0x10000)
729 return;
730 }
731 if (i == 8)
732 return;
733
734 res = kzalloc(sizeof(*res), GFP_KERNEL);
735 if (!res)
736 return;
737
738 /*
739 * Allocate a 256GB window directly below the 0xfd00000000 hardware
740 * limit (see AMD Family 15h Models 30h-3Fh BKDG, sec 2.4.6).
741 */
742 res->name = name;
743 res->flags = IORESOURCE_PREFETCH | IORESOURCE_MEM |
744 IORESOURCE_MEM_64 | IORESOURCE_WINDOW;
745 res->start = 0xbd00000000ull;
746 res->end = 0xfd00000000ull - 1;
747
748 conflict = request_resource_conflict(&iomem_resource, res);
749 if (conflict) {
750 kfree(res);
751 if (conflict->name != name)
752 return;
753
754 /* We are resuming from suspend; just reenable the window */
755 res = conflict;
756 } else {
757 dev_info(&dev->dev, "adding root bus resource %pR (tainting kernel)\n",
758 res);
759 add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
760 pci_bus_add_resource(dev->bus, res, 0);
761 }
762
763 base = ((res->start >> 8) & AMD_141b_MMIO_BASE_MMIOBASE_MASK) |
764 AMD_141b_MMIO_BASE_RE_MASK | AMD_141b_MMIO_BASE_WE_MASK;
765 limit = ((res->end + 1) >> 8) & AMD_141b_MMIO_LIMIT_MMIOLIMIT_MASK;
766 high = ((res->start >> 40) & AMD_141b_MMIO_HIGH_MMIOBASE_MASK) |
767 ((((res->end + 1) >> 40) << AMD_141b_MMIO_HIGH_MMIOLIMIT_SHIFT)
768 & AMD_141b_MMIO_HIGH_MMIOLIMIT_MASK);
769
770 pci_write_config_dword(dev, AMD_141b_MMIO_HIGH(i), high);
771 pci_write_config_dword(dev, AMD_141b_MMIO_LIMIT(i), limit);
772 pci_write_config_dword(dev, AMD_141b_MMIO_BASE(i), base);
773 }
774 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
775 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
776 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
777 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
778 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
779 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
780 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
781 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
782 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
783 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
784
785 #define RS690_LOWER_TOP_OF_DRAM2 0x30
786 #define RS690_LOWER_TOP_OF_DRAM2_VALID 0x1
787 #define RS690_UPPER_TOP_OF_DRAM2 0x31
788 #define RS690_HTIU_NB_INDEX 0xA8
789 #define RS690_HTIU_NB_INDEX_WR_ENABLE 0x100
790 #define RS690_HTIU_NB_DATA 0xAC
791
792 /*
793 * Some BIOS implementations support RAM above 4GB, but do not configure the
794 * PCI host to respond to bus master accesses for these addresses. These
795 * implementations set the TOP_OF_DRAM_SLOT1 register correctly, so PCI DMA
796 * works as expected for addresses below 4GB.
797 *
798 * Reference: "AMD RS690 ASIC Family Register Reference Guide" (pg. 2-57)
799 * https://www.amd.com/system/files/TechDocs/43372_rs690_rrg_3.00o.pdf
800 */
rs690_fix_64bit_dma(struct pci_dev * pdev)801 static void rs690_fix_64bit_dma(struct pci_dev *pdev)
802 {
803 u32 val = 0;
804 phys_addr_t top_of_dram = __pa(high_memory - 1) + 1;
805
806 if (top_of_dram <= (1ULL << 32))
807 return;
808
809 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
810 RS690_LOWER_TOP_OF_DRAM2);
811 pci_read_config_dword(pdev, RS690_HTIU_NB_DATA, &val);
812
813 if (val)
814 return;
815
816 pci_info(pdev, "Adjusting top of DRAM to %pa for 64-bit DMA support\n", &top_of_dram);
817
818 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
819 RS690_UPPER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
820 pci_write_config_dword(pdev, RS690_HTIU_NB_DATA, top_of_dram >> 32);
821
822 pci_write_config_dword(pdev, RS690_HTIU_NB_INDEX,
823 RS690_LOWER_TOP_OF_DRAM2 | RS690_HTIU_NB_INDEX_WR_ENABLE);
824 pci_write_config_dword(pdev, RS690_HTIU_NB_DATA,
825 top_of_dram | RS690_LOWER_TOP_OF_DRAM2_VALID);
826 }
827 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7910, rs690_fix_64bit_dma);
828
829 #endif
830
831 #ifdef CONFIG_AMD_NB
832
833 #define AMD_15B8_RCC_DEV2_EPF0_STRAP2 0x10136008
834 #define AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK 0x00000080L
835
quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev * dev)836 static void quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev *dev)
837 {
838 u32 data;
839
840 if (!amd_smn_read(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, &data)) {
841 data &= ~AMD_15B8_RCC_DEV2_EPF0_STRAP2_NO_SOFT_RESET_DEV2_F0_MASK;
842 if (amd_smn_write(0, AMD_15B8_RCC_DEV2_EPF0_STRAP2, data))
843 pci_err(dev, "Failed to write data 0x%x\n", data);
844 } else {
845 pci_err(dev, "Failed to read data\n");
846 }
847 }
848 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b8, quirk_clear_strap_no_soft_reset_dev2_f0);
849 #endif
850
851 /*
852 * When returning from D3cold to D0, firmware on some Google Coral and Reef
853 * family Chromebooks with Intel Apollo Lake SoC clobbers the headers of
854 * both the L1 PM Substates capability and the previous capability for the
855 * "Celeron N3350/Pentium N4200/Atom E3900 Series PCI Express Port B #1".
856 *
857 * Save those values at enumeration-time and restore them at resume.
858 */
859
860 static u16 prev_cap, l1ss_cap;
861 static u32 prev_header, l1ss_header;
862
chromeos_save_apl_pci_l1ss_capability(struct pci_dev * dev)863 static void chromeos_save_apl_pci_l1ss_capability(struct pci_dev *dev)
864 {
865 int pos = PCI_CFG_SPACE_SIZE, prev = 0;
866 u32 header, pheader = 0;
867
868 while (pos) {
869 pci_read_config_dword(dev, pos, &header);
870 if (PCI_EXT_CAP_ID(header) == PCI_EXT_CAP_ID_L1SS) {
871 prev_cap = prev;
872 prev_header = pheader;
873 l1ss_cap = pos;
874 l1ss_header = header;
875 return;
876 }
877
878 prev = pos;
879 pheader = header;
880 pos = PCI_EXT_CAP_NEXT(header);
881 }
882 }
883
chromeos_fixup_apl_pci_l1ss_capability(struct pci_dev * dev)884 static void chromeos_fixup_apl_pci_l1ss_capability(struct pci_dev *dev)
885 {
886 u32 header;
887
888 if (!prev_cap || !prev_header || !l1ss_cap || !l1ss_header)
889 return;
890
891 /* Fixup the header of L1SS Capability if missing */
892 pci_read_config_dword(dev, l1ss_cap, &header);
893 if (header != l1ss_header) {
894 pci_write_config_dword(dev, l1ss_cap, l1ss_header);
895 pci_info(dev, "restore L1SS Capability header (was %#010x now %#010x)\n",
896 header, l1ss_header);
897 }
898
899 /* Fixup the link to L1SS Capability if missing */
900 pci_read_config_dword(dev, prev_cap, &header);
901 if (header != prev_header) {
902 pci_write_config_dword(dev, prev_cap, prev_header);
903 pci_info(dev, "restore previous Capability header (was %#010x now %#010x)\n",
904 header, prev_header);
905 }
906 }
907 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_save_apl_pci_l1ss_capability);
908 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_fixup_apl_pci_l1ss_capability);
909
910 /*
911 * Disable D3cold on Asus B1400 PCI-NVMe bridge
912 *
913 * On this platform with VMD off, the NVMe device cannot successfully power
914 * back on from D3cold. This appears to be an untested transition by the
915 * vendor: Windows leaves the NVMe and parent bridge in D0 during suspend.
916 *
917 * We disable D3cold on the parent bridge for simplicity, and the fact that
918 * both parent bridge and NVMe device share the same power resource.
919 *
920 * This is only needed on BIOS versions before 308; the newer versions flip
921 * StorageD3Enable from 1 to 0.
922 */
923 static const struct dmi_system_id asus_nvme_broken_d3cold_table[] = {
924 {
925 .matches = {
926 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
927 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.304"),
928 },
929 },
930 {
931 .matches = {
932 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
933 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.305"),
934 },
935 },
936 {
937 .matches = {
938 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
939 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.306"),
940 },
941 },
942 {
943 .matches = {
944 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
945 DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.307"),
946 },
947 },
948 {}
949 };
950
asus_disable_nvme_d3cold(struct pci_dev * pdev)951 static void asus_disable_nvme_d3cold(struct pci_dev *pdev)
952 {
953 if (dmi_check_system(asus_nvme_broken_d3cold_table) > 0)
954 pci_d3cold_disable(pdev);
955 }
956 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x9a09, asus_disable_nvme_d3cold);
957
958 #ifdef CONFIG_SUSPEND
959 /*
960 * Root Ports on some AMD SoCs advertise PME_Support for D3hot and D3cold, but
961 * if the SoC is put into a hardware sleep state by the amd-pmc driver, the
962 * Root Ports don't generate wakeup interrupts for USB devices.
963 *
964 * When suspending, remove D3hot and D3cold from the PME_Support advertised
965 * by the Root Port so we don't use those states if we're expecting wakeup
966 * interrupts. Restore the advertised PME_Support when resuming.
967 */
amd_rp_pme_suspend(struct pci_dev * dev)968 static void amd_rp_pme_suspend(struct pci_dev *dev)
969 {
970 struct pci_dev *rp;
971
972 /*
973 * PM_SUSPEND_ON means we're doing runtime suspend, which means
974 * amd-pmc will not be involved so PMEs during D3 work as advertised.
975 *
976 * The PMEs *do* work if amd-pmc doesn't put the SoC in the hardware
977 * sleep state, but we assume amd-pmc is always present.
978 */
979 if (pm_suspend_target_state == PM_SUSPEND_ON)
980 return;
981
982 rp = pcie_find_root_port(dev);
983 if (!rp->pm_cap)
984 return;
985
986 rp->pme_support &= ~((PCI_PM_CAP_PME_D3hot|PCI_PM_CAP_PME_D3cold) >>
987 PCI_PM_CAP_PME_SHIFT);
988 dev_info_once(&rp->dev, "quirk: disabling D3cold for suspend\n");
989 }
990
amd_rp_pme_resume(struct pci_dev * dev)991 static void amd_rp_pme_resume(struct pci_dev *dev)
992 {
993 struct pci_dev *rp;
994 u16 pmc;
995
996 rp = pcie_find_root_port(dev);
997 if (!rp->pm_cap)
998 return;
999
1000 pci_read_config_word(rp, rp->pm_cap + PCI_PM_PMC, &pmc);
1001 rp->pme_support = FIELD_GET(PCI_PM_CAP_PME_MASK, pmc);
1002 }
1003 /* Rembrandt (yellow_carp) */
1004 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x162e, amd_rp_pme_suspend);
1005 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x162e, amd_rp_pme_resume);
1006 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x162f, amd_rp_pme_suspend);
1007 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x162f, amd_rp_pme_resume);
1008 /* Phoenix (pink_sardine) */
1009 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x1668, amd_rp_pme_suspend);
1010 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1668, amd_rp_pme_resume);
1011 DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x1669, amd_rp_pme_suspend);
1012 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1669, amd_rp_pme_resume);
1013 #endif /* CONFIG_SUSPEND */
1014