Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * Copyright (C) 2002 Dominik Brodowski <devel@brodo.de> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License along | |
21 | * with this program; if not, write to the Free Software Foundation, Inc., | |
22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | */ | |
26 | ||
1da177e4 | 27 | |
391df5dc | 28 | #include <linux/dmi.h> |
1da177e4 LT |
29 | #include <linux/kernel.h> |
30 | #include <linux/module.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/proc_fs.h> | |
34 | #include <linux/spinlock.h> | |
35 | #include <linux/pm.h> | |
36 | #include <linux/pci.h> | |
37 | #include <linux/acpi.h> | |
38 | #include <acpi/acpi_bus.h> | |
39 | #include <acpi/acpi_drivers.h> | |
40 | ||
1da177e4 | 41 | #define _COMPONENT ACPI_PCI_COMPONENT |
f52fd66d | 42 | ACPI_MODULE_NAME("pci_irq"); |
1da177e4 | 43 | |
f748bafa | 44 | struct acpi_prt_entry { |
3604a9f4 | 45 | struct list_head list; |
f748bafa BH |
46 | struct acpi_pci_id id; |
47 | u8 pin; | |
48 | struct { | |
49 | acpi_handle handle; | |
50 | u32 index; | |
51 | } link; | |
52 | u32 irq; | |
53 | }; | |
54 | ||
3604a9f4 | 55 | static LIST_HEAD(acpi_prt_list); |
1da177e4 LT |
56 | static DEFINE_SPINLOCK(acpi_prt_lock); |
57 | ||
cf68b80b BH |
58 | static inline char pin_name(int pin) |
59 | { | |
e64e9db5 | 60 | return 'A' + pin - 1; |
cf68b80b BH |
61 | } |
62 | ||
1da177e4 LT |
63 | /* -------------------------------------------------------------------------- |
64 | PCI IRQ Routing Table (PRT) Support | |
65 | -------------------------------------------------------------------------- */ | |
66 | ||
063563b4 BH |
67 | static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
68 | int pin) | |
1da177e4 | 69 | { |
3604a9f4 | 70 | struct acpi_prt_entry *entry; |
063563b4 BH |
71 | int segment = pci_domain_nr(dev->bus); |
72 | int bus = dev->bus->number; | |
73 | int device = PCI_SLOT(dev->devfn); | |
1da177e4 | 74 | |
1da177e4 | 75 | spin_lock(&acpi_prt_lock); |
3604a9f4 | 76 | list_for_each_entry(entry, &acpi_prt_list, list) { |
4be44fcd LB |
77 | if ((segment == entry->id.segment) |
78 | && (bus == entry->id.bus) | |
79 | && (device == entry->id.device) | |
80 | && (pin == entry->pin)) { | |
1da177e4 | 81 | spin_unlock(&acpi_prt_lock); |
d550d98d | 82 | return entry; |
1da177e4 LT |
83 | } |
84 | } | |
1da177e4 | 85 | spin_unlock(&acpi_prt_lock); |
d550d98d | 86 | return NULL; |
1da177e4 LT |
87 | } |
88 | ||
391df5dc BH |
89 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
90 | static struct dmi_system_id medion_md9580[] = { | |
91 | { | |
92 | .ident = "Medion MD9580-F laptop", | |
93 | .matches = { | |
94 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), | |
95 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), | |
96 | }, | |
97 | }, | |
98 | { } | |
99 | }; | |
100 | ||
101 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ | |
102 | static struct dmi_system_id dell_optiplex[] = { | |
103 | { | |
104 | .ident = "Dell Optiplex GX1", | |
105 | .matches = { | |
106 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
107 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), | |
108 | }, | |
109 | }, | |
110 | { } | |
111 | }; | |
112 | ||
113 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ | |
114 | static struct dmi_system_id hp_t5710[] = { | |
115 | { | |
116 | .ident = "HP t5710", | |
117 | .matches = { | |
118 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
119 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), | |
120 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), | |
121 | }, | |
122 | }, | |
123 | { } | |
124 | }; | |
125 | ||
126 | struct prt_quirk { | |
127 | struct dmi_system_id *system; | |
128 | unsigned int segment; | |
129 | unsigned int bus; | |
130 | unsigned int device; | |
131 | unsigned char pin; | |
132 | char *source; /* according to BIOS */ | |
133 | char *actual_source; | |
134 | }; | |
135 | ||
c458033c BH |
136 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
137 | ||
391df5dc BH |
138 | /* |
139 | * These systems have incorrect _PRT entries. The BIOS claims the PCI | |
140 | * interrupt at the listed segment/bus/device/pin is connected to the first | |
141 | * link device, but it is actually connected to the second. | |
142 | */ | |
143 | static struct prt_quirk prt_quirks[] = { | |
c458033c | 144 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
b97d4803 BH |
145 | "\\_SB_.PCI0.ISA_.LNKA", |
146 | "\\_SB_.PCI0.ISA_.LNKB"}, | |
c458033c | 147 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
391df5dc BH |
148 | "\\_SB_.LNKB", |
149 | "\\_SB_.LNKA"}, | |
c458033c | 150 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
391df5dc BH |
151 | "\\_SB_.PCI0.LNK1", |
152 | "\\_SB_.PCI0.LNK3"}, | |
153 | }; | |
154 | ||
155 | static void | |
156 | do_prt_fixups(struct acpi_prt_entry *entry, struct acpi_pci_routing_table *prt) | |
157 | { | |
158 | int i; | |
159 | struct prt_quirk *quirk; | |
160 | ||
161 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { | |
162 | quirk = &prt_quirks[i]; | |
163 | ||
164 | /* All current quirks involve link devices, not GSIs */ | |
165 | if (!prt->source) | |
166 | continue; | |
167 | ||
168 | if (dmi_check_system(quirk->system) && | |
169 | entry->id.segment == quirk->segment && | |
170 | entry->id.bus == quirk->bus && | |
171 | entry->id.device == quirk->device && | |
c458033c | 172 | entry->pin == quirk->pin && |
391df5dc BH |
173 | !strcmp(prt->source, quirk->source) && |
174 | strlen(prt->source) >= strlen(quirk->actual_source)) { | |
175 | printk(KERN_WARNING PREFIX "firmware reports " | |
c83642d5 | 176 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
391df5dc BH |
177 | "changing to %s\n", |
178 | entry->id.segment, entry->id.bus, | |
cf68b80b | 179 | entry->id.device, pin_name(entry->pin), |
391df5dc BH |
180 | prt->source, quirk->actual_source); |
181 | strcpy(prt->source, quirk->actual_source); | |
182 | } | |
183 | } | |
184 | } | |
185 | ||
1da177e4 | 186 | static int |
4be44fcd LB |
187 | acpi_pci_irq_add_entry(acpi_handle handle, |
188 | int segment, int bus, struct acpi_pci_routing_table *prt) | |
1da177e4 | 189 | { |
3604a9f4 | 190 | struct acpi_prt_entry *entry; |
1da177e4 | 191 | |
36bcbec7 | 192 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
1da177e4 | 193 | if (!entry) |
d550d98d | 194 | return -ENOMEM; |
1da177e4 | 195 | |
e64e9db5 BH |
196 | /* |
197 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses | |
198 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert | |
199 | * it here. | |
200 | */ | |
1da177e4 LT |
201 | entry->id.segment = segment; |
202 | entry->id.bus = bus; | |
203 | entry->id.device = (prt->address >> 16) & 0xFFFF; | |
e64e9db5 | 204 | entry->pin = prt->pin + 1; |
1da177e4 | 205 | |
391df5dc BH |
206 | do_prt_fixups(entry, prt); |
207 | ||
1da177e4 LT |
208 | /* |
209 | * Type 1: Dynamic | |
210 | * --------------- | |
211 | * The 'source' field specifies the PCI interrupt link device used to | |
212 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' | |
213 | * indicates which resource descriptor in the resource template (of | |
214 | * the link device) this interrupt is allocated from. | |
215 | * | |
216 | * NOTE: Don't query the Link Device for IRQ information at this time | |
217 | * because Link Device enumeration may not have occurred yet | |
218 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI | |
219 | * namespace). | |
220 | */ | |
221 | if (prt->source[0]) { | |
222 | acpi_get_handle(handle, prt->source, &entry->link.handle); | |
223 | entry->link.index = prt->source_index; | |
224 | } | |
225 | /* | |
226 | * Type 2: Static | |
227 | * -------------- | |
228 | * The 'source' field is NULL, and the 'source_index' field specifies | |
229 | * the IRQ value, which is hardwired to specific interrupt inputs on | |
230 | * the interrupt controller. | |
231 | */ | |
232 | else | |
233 | entry->link.index = prt->source_index; | |
234 | ||
235 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, | |
21a53283 | 236 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
4be44fcd | 237 | entry->id.segment, entry->id.bus, |
cf68b80b BH |
238 | entry->id.device, pin_name(entry->pin), |
239 | prt->source, entry->link.index)); | |
1da177e4 LT |
240 | |
241 | spin_lock(&acpi_prt_lock); | |
3604a9f4 | 242 | list_add_tail(&entry->list, &acpi_prt_list); |
1da177e4 LT |
243 | spin_unlock(&acpi_prt_lock); |
244 | ||
d550d98d | 245 | return 0; |
1da177e4 LT |
246 | } |
247 | ||
4be44fcd | 248 | int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus) |
1da177e4 | 249 | { |
2320ac6c BH |
250 | acpi_status status; |
251 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
252 | struct acpi_pci_routing_table *entry; | |
1da177e4 | 253 | |
2320ac6c BH |
254 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
255 | status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
256 | if (ACPI_FAILURE(status)) | |
257 | return -ENODEV; | |
1da177e4 LT |
258 | |
259 | printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n", | |
2320ac6c | 260 | (char *) buffer.pointer); |
1da177e4 | 261 | |
2320ac6c | 262 | kfree(buffer.pointer); |
1da177e4 | 263 | |
2320ac6c | 264 | buffer.length = ACPI_ALLOCATE_BUFFER; |
1da177e4 | 265 | buffer.pointer = NULL; |
1da177e4 LT |
266 | |
267 | status = acpi_get_irq_routing_table(handle, &buffer); | |
268 | if (ACPI_FAILURE(status)) { | |
a6fc6720 TR |
269 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]", |
270 | acpi_format_exception(status))); | |
1da177e4 | 271 | kfree(buffer.pointer); |
d550d98d | 272 | return -ENODEV; |
1da177e4 LT |
273 | } |
274 | ||
2320ac6c | 275 | entry = buffer.pointer; |
1da177e4 LT |
276 | while (entry && (entry->length > 0)) { |
277 | acpi_pci_irq_add_entry(handle, segment, bus, entry); | |
278 | entry = (struct acpi_pci_routing_table *) | |
4be44fcd | 279 | ((unsigned long)entry + entry->length); |
1da177e4 LT |
280 | } |
281 | ||
2320ac6c | 282 | kfree(buffer.pointer); |
d550d98d | 283 | return 0; |
1da177e4 LT |
284 | } |
285 | ||
4be44fcd | 286 | void acpi_pci_irq_del_prt(int segment, int bus) |
1da177e4 | 287 | { |
3604a9f4 | 288 | struct acpi_prt_entry *entry, *tmp; |
1da177e4 | 289 | |
4be44fcd | 290 | printk(KERN_DEBUG |
21a53283 BH |
291 | "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n", |
292 | segment, bus); | |
1da177e4 | 293 | spin_lock(&acpi_prt_lock); |
3604a9f4 BH |
294 | list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) { |
295 | if (segment == entry->id.segment && bus == entry->id.bus) { | |
296 | list_del(&entry->list); | |
297 | kfree(entry); | |
298 | } | |
1da177e4 LT |
299 | } |
300 | spin_unlock(&acpi_prt_lock); | |
301 | } | |
4be44fcd | 302 | |
1da177e4 LT |
303 | /* -------------------------------------------------------------------------- |
304 | PCI Interrupt Routing Support | |
305 | -------------------------------------------------------------------------- */ | |
87bec66b DSL |
306 | static int |
307 | acpi_pci_allocate_irq(struct acpi_prt_entry *entry, | |
50eca3eb | 308 | int *triggering, int *polarity, char **link) |
87bec66b | 309 | { |
4be44fcd | 310 | int irq; |
87bec66b | 311 | |
87bec66b DSL |
312 | |
313 | if (entry->link.handle) { | |
314 | irq = acpi_pci_link_allocate_irq(entry->link.handle, | |
50eca3eb BM |
315 | entry->link.index, triggering, |
316 | polarity, link); | |
87bec66b | 317 | if (irq < 0) { |
cece9296 LB |
318 | printk(KERN_WARNING PREFIX |
319 | "Invalid IRQ link routing entry\n"); | |
d550d98d | 320 | return -1; |
87bec66b DSL |
321 | } |
322 | } else { | |
323 | irq = entry->link.index; | |
50eca3eb BM |
324 | *triggering = ACPI_LEVEL_SENSITIVE; |
325 | *polarity = ACPI_ACTIVE_LOW; | |
87bec66b DSL |
326 | } |
327 | ||
c13f889a | 328 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found GSI %d\n", irq)); |
d550d98d | 329 | return irq; |
87bec66b DSL |
330 | } |
331 | ||
332 | static int | |
beba8a64 | 333 | acpi_pci_free_irq(struct acpi_prt_entry *entry) |
87bec66b | 334 | { |
4be44fcd | 335 | int irq; |
87bec66b | 336 | |
87bec66b DSL |
337 | if (entry->link.handle) { |
338 | irq = acpi_pci_link_free_irq(entry->link.handle); | |
339 | } else { | |
340 | irq = entry->link.index; | |
341 | } | |
d550d98d | 342 | return irq; |
87bec66b | 343 | } |
4be44fcd | 344 | |
beba8a64 BH |
345 | static struct acpi_prt_entry * |
346 | acpi_pci_irq_lookup(struct pci_dev *dev, int pin) | |
1da177e4 | 347 | { |
beba8a64 | 348 | struct acpi_prt_entry *entry; |
5697b7ca BH |
349 | struct pci_dev *bridge; |
350 | u8 bridge_pin, orig_pin = pin; | |
1da177e4 | 351 | |
063563b4 | 352 | entry = acpi_pci_irq_find_prt_entry(dev, pin); |
3b1ea18d BH |
353 | if (entry) { |
354 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", | |
1350487e | 355 | pci_name(dev), pin_name(pin))); |
3b1ea18d | 356 | return entry; |
1da177e4 | 357 | } |
4be44fcd | 358 | |
1da177e4 LT |
359 | /* |
360 | * Attempt to derive an IRQ for this device from a parent bridge's | |
361 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). | |
362 | */ | |
ee401363 BH |
363 | bridge = dev->bus->self; |
364 | while (bridge) { | |
365 | pin = (((pin - 1) + PCI_SLOT(dev->devfn)) % 4) + 1; | |
1da177e4 LT |
366 | |
367 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { | |
368 | /* PC card has the same IRQ as its cardbridge */ | |
8015a014 | 369 | bridge_pin = bridge->pin; |
1da177e4 | 370 | if (!bridge_pin) { |
4be44fcd LB |
371 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
372 | "No interrupt pin configured for device %s\n", | |
373 | pci_name(bridge))); | |
beba8a64 | 374 | return NULL; |
1da177e4 | 375 | } |
1da177e4 LT |
376 | pin = bridge_pin; |
377 | } | |
378 | ||
5697b7ca | 379 | entry = acpi_pci_irq_find_prt_entry(bridge, pin); |
3b1ea18d BH |
380 | if (entry) { |
381 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
382 | "Derived GSI for %s INT %c from %s\n", | |
383 | pci_name(dev), pin_name(orig_pin), | |
384 | pci_name(bridge))); | |
385 | return entry; | |
386 | } | |
ee401363 BH |
387 | |
388 | dev = bridge; | |
389 | bridge = dev->bus->self; | |
1da177e4 LT |
390 | } |
391 | ||
3b1ea18d BH |
392 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
393 | pin_name(orig_pin)); | |
394 | return NULL; | |
1da177e4 LT |
395 | } |
396 | ||
397 | /* | |
398 | * acpi_pci_irq_enable | |
399 | * success: return 0 | |
400 | * failure: return < 0 | |
401 | */ | |
402 | ||
4be44fcd | 403 | int acpi_pci_irq_enable(struct pci_dev *dev) |
1da177e4 | 404 | { |
beba8a64 | 405 | struct acpi_prt_entry *entry; |
c13f889a | 406 | int gsi = 0; |
4be44fcd | 407 | u8 pin = 0; |
50eca3eb BM |
408 | int triggering = ACPI_LEVEL_SENSITIVE; |
409 | int polarity = ACPI_ACTIVE_LOW; | |
4be44fcd | 410 | char *link = NULL; |
c83642d5 | 411 | char link_desc[16]; |
4be44fcd | 412 | int rc; |
1da177e4 | 413 | |
1da177e4 | 414 | |
8015a014 | 415 | pin = dev->pin; |
1da177e4 | 416 | if (!pin) { |
4be44fcd LB |
417 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
418 | "No interrupt pin configured for device %s\n", | |
419 | pci_name(dev))); | |
d550d98d | 420 | return 0; |
1da177e4 | 421 | } |
1da177e4 | 422 | |
beba8a64 | 423 | entry = acpi_pci_irq_lookup(dev, pin); |
5697b7ca | 424 | if (!entry) { |
96c2a876 AC |
425 | /* |
426 | * IDE legacy mode controller IRQs are magic. Why do compat | |
427 | * extensions always make such a nasty mess. | |
428 | */ | |
429 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && | |
430 | (dev->class & 0x05) == 0) | |
431 | return 0; | |
432 | } | |
5697b7ca BH |
433 | |
434 | if (entry) | |
435 | gsi = acpi_pci_allocate_irq(entry, &triggering, &polarity, | |
436 | &link); | |
437 | else | |
438 | gsi = -1; | |
439 | ||
1da177e4 LT |
440 | /* |
441 | * No IRQ known to the ACPI subsystem - maybe the BIOS / | |
442 | * driver reported one, then use it. Exit in any case. | |
443 | */ | |
c13f889a | 444 | if (gsi < 0) { |
cf68b80b | 445 | dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin)); |
1da177e4 | 446 | /* Interrupt Line values above 0xF are forbidden */ |
44f8e1a2 | 447 | if (dev->irq > 0 && (dev->irq <= 0xF)) { |
1da177e4 | 448 | printk(" - using IRQ %d\n", dev->irq); |
4be44fcd LB |
449 | acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE, |
450 | ACPI_ACTIVE_LOW); | |
d550d98d | 451 | return 0; |
4be44fcd | 452 | } else { |
1da177e4 | 453 | printk("\n"); |
d550d98d | 454 | return 0; |
1da177e4 | 455 | } |
4be44fcd | 456 | } |
1da177e4 | 457 | |
c13f889a | 458 | rc = acpi_register_gsi(gsi, triggering, polarity); |
349f0d56 | 459 | if (rc < 0) { |
c83642d5 | 460 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
cf68b80b | 461 | pin_name(pin)); |
d550d98d | 462 | return rc; |
349f0d56 KK |
463 | } |
464 | dev->irq = rc; | |
1da177e4 | 465 | |
1da177e4 | 466 | if (link) |
c83642d5 BH |
467 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
468 | else | |
469 | link_desc[0] = '\0'; | |
1da177e4 | 470 | |
c83642d5 | 471 | dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
cf68b80b | 472 | pin_name(pin), link_desc, gsi, |
c83642d5 BH |
473 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", |
474 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); | |
1da177e4 | 475 | |
d550d98d | 476 | return 0; |
1da177e4 | 477 | } |
1da177e4 | 478 | |
87bec66b | 479 | /* FIXME: implement x86/x86_64 version */ |
4be44fcd LB |
480 | void __attribute__ ((weak)) acpi_unregister_gsi(u32 i) |
481 | { | |
482 | } | |
87bec66b | 483 | |
4be44fcd | 484 | void acpi_pci_irq_disable(struct pci_dev *dev) |
1da177e4 | 485 | { |
beba8a64 | 486 | struct acpi_prt_entry *entry; |
4be44fcd LB |
487 | int gsi = 0; |
488 | u8 pin = 0; | |
1da177e4 | 489 | |
1da177e4 | 490 | |
8015a014 | 491 | pin = dev->pin; |
1da177e4 | 492 | if (!pin) |
d550d98d | 493 | return; |
1da177e4 | 494 | |
beba8a64 | 495 | entry = acpi_pci_irq_lookup(dev, pin); |
beba8a64 | 496 | if (!entry) |
d550d98d | 497 | return; |
1da177e4 | 498 | |
beba8a64 BH |
499 | gsi = acpi_pci_free_irq(entry); |
500 | ||
1da177e4 LT |
501 | /* |
502 | * TBD: It might be worth clearing dev->irq by magic constant | |
503 | * (e.g. PCI_UNDEFINED_IRQ). | |
504 | */ | |
505 | ||
cf68b80b | 506 | dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
1da177e4 | 507 | acpi_unregister_gsi(gsi); |
1da177e4 | 508 | } |