Root/
1 | /* |
2 | * Provides ACPI support for IDE drives. |
3 | * |
4 | * Copyright (C) 2005 Intel Corp. |
5 | * Copyright (C) 2005 Randy Dunlap |
6 | * Copyright (C) 2006 SUSE Linux Products GmbH |
7 | * Copyright (C) 2006 Hannes Reinecke |
8 | */ |
9 | |
10 | #include <linux/ata.h> |
11 | #include <linux/delay.h> |
12 | #include <linux/device.h> |
13 | #include <linux/errno.h> |
14 | #include <linux/kernel.h> |
15 | #include <acpi/acpi.h> |
16 | #include <linux/ide.h> |
17 | #include <linux/pci.h> |
18 | #include <linux/dmi.h> |
19 | |
20 | #include <acpi/acpi_bus.h> |
21 | |
22 | #define REGS_PER_GTF 7 |
23 | |
24 | struct GTM_buffer { |
25 | u32 PIO_speed0; |
26 | u32 DMA_speed0; |
27 | u32 PIO_speed1; |
28 | u32 DMA_speed1; |
29 | u32 GTM_flags; |
30 | }; |
31 | |
32 | struct ide_acpi_drive_link { |
33 | acpi_handle obj_handle; |
34 | u8 idbuff[512]; |
35 | }; |
36 | |
37 | struct ide_acpi_hwif_link { |
38 | ide_hwif_t *hwif; |
39 | acpi_handle obj_handle; |
40 | struct GTM_buffer gtm; |
41 | struct ide_acpi_drive_link master; |
42 | struct ide_acpi_drive_link slave; |
43 | }; |
44 | |
45 | #undef DEBUGGING |
46 | /* note: adds function name and KERN_DEBUG */ |
47 | #ifdef DEBUGGING |
48 | #define DEBPRINT(fmt, args...) \ |
49 | printk(KERN_DEBUG "%s: " fmt, __func__, ## args) |
50 | #else |
51 | #define DEBPRINT(fmt, args...) do {} while (0) |
52 | #endif /* DEBUGGING */ |
53 | |
54 | static int ide_noacpi; |
55 | module_param_named(noacpi, ide_noacpi, bool, 0); |
56 | MODULE_PARM_DESC(noacpi, "disable IDE ACPI support"); |
57 | |
58 | static int ide_acpigtf; |
59 | module_param_named(acpigtf, ide_acpigtf, bool, 0); |
60 | MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support"); |
61 | |
62 | static int ide_acpionboot; |
63 | module_param_named(acpionboot, ide_acpionboot, bool, 0); |
64 | MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot"); |
65 | |
66 | static bool ide_noacpi_psx; |
67 | static int no_acpi_psx(const struct dmi_system_id *id) |
68 | { |
69 | ide_noacpi_psx = true; |
70 | printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident); |
71 | return 0; |
72 | } |
73 | |
74 | static const struct dmi_system_id ide_acpi_dmi_table[] = { |
75 | /* Bug 9673. */ |
76 | /* We should check if this is because ACPI NVS isn't save/restored. */ |
77 | { |
78 | .callback = no_acpi_psx, |
79 | .ident = "HP nx9005", |
80 | .matches = { |
81 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."), |
82 | DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60") |
83 | }, |
84 | }, |
85 | |
86 | { } /* terminate list */ |
87 | }; |
88 | |
89 | int ide_acpi_init(void) |
90 | { |
91 | dmi_check_system(ide_acpi_dmi_table); |
92 | return 0; |
93 | } |
94 | |
95 | bool ide_port_acpi(ide_hwif_t *hwif) |
96 | { |
97 | return ide_noacpi == 0 && hwif->acpidata; |
98 | } |
99 | |
100 | /** |
101 | * ide_get_dev_handle - finds acpi_handle and PCI device.function |
102 | * @dev: device to locate |
103 | * @handle: returned acpi_handle for @dev |
104 | * @pcidevfn: return PCI device.func for @dev |
105 | * |
106 | * Returns the ACPI object handle to the corresponding PCI device. |
107 | * |
108 | * Returns 0 on success, <0 on error. |
109 | */ |
110 | static int ide_get_dev_handle(struct device *dev, acpi_handle *handle, |
111 | acpi_integer *pcidevfn) |
112 | { |
113 | struct pci_dev *pdev = to_pci_dev(dev); |
114 | unsigned int bus, devnum, func; |
115 | acpi_integer addr; |
116 | acpi_handle dev_handle; |
117 | acpi_status status; |
118 | struct acpi_device_info *dinfo = NULL; |
119 | int ret = -ENODEV; |
120 | |
121 | bus = pdev->bus->number; |
122 | devnum = PCI_SLOT(pdev->devfn); |
123 | func = PCI_FUNC(pdev->devfn); |
124 | /* ACPI _ADR encoding for PCI bus: */ |
125 | addr = (acpi_integer)(devnum << 16 | func); |
126 | |
127 | DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func); |
128 | |
129 | dev_handle = DEVICE_ACPI_HANDLE(dev); |
130 | if (!dev_handle) { |
131 | DEBPRINT("no acpi handle for device\n"); |
132 | goto err; |
133 | } |
134 | |
135 | status = acpi_get_object_info(dev_handle, &dinfo); |
136 | if (ACPI_FAILURE(status)) { |
137 | DEBPRINT("get_object_info for device failed\n"); |
138 | goto err; |
139 | } |
140 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && |
141 | dinfo->address == addr) { |
142 | *pcidevfn = addr; |
143 | *handle = dev_handle; |
144 | } else { |
145 | DEBPRINT("get_object_info for device has wrong " |
146 | " address: %llu, should be %u\n", |
147 | dinfo ? (unsigned long long)dinfo->address : -1ULL, |
148 | (unsigned int)addr); |
149 | goto err; |
150 | } |
151 | |
152 | DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n", |
153 | devnum, func, (unsigned long long)addr, *handle); |
154 | ret = 0; |
155 | err: |
156 | kfree(dinfo); |
157 | return ret; |
158 | } |
159 | |
160 | /** |
161 | * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif |
162 | * @hwif: device to locate |
163 | * |
164 | * Retrieves the object handle for a given hwif. |
165 | * |
166 | * Returns handle on success, 0 on error. |
167 | */ |
168 | static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) |
169 | { |
170 | struct device *dev = hwif->gendev.parent; |
171 | acpi_handle uninitialized_var(dev_handle); |
172 | acpi_integer pcidevfn; |
173 | acpi_handle chan_handle; |
174 | int err; |
175 | |
176 | DEBPRINT("ENTER: device %s\n", hwif->name); |
177 | |
178 | if (!dev) { |
179 | DEBPRINT("no PCI device for %s\n", hwif->name); |
180 | return NULL; |
181 | } |
182 | |
183 | err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn); |
184 | if (err < 0) { |
185 | DEBPRINT("ide_get_dev_handle failed (%d)\n", err); |
186 | return NULL; |
187 | } |
188 | |
189 | /* get child objects of dev_handle == channel objects, |
190 | * + _their_ children == drive objects */ |
191 | /* channel is hwif->channel */ |
192 | chan_handle = acpi_get_child(dev_handle, hwif->channel); |
193 | DEBPRINT("chan adr=%d: handle=0x%p\n", |
194 | hwif->channel, chan_handle); |
195 | |
196 | return chan_handle; |
197 | } |
198 | |
199 | /** |
200 | * do_drive_get_GTF - get the drive bootup default taskfile settings |
201 | * @drive: the drive for which the taskfile settings should be retrieved |
202 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address |
203 | * @gtf_address: buffer containing _GTF taskfile arrays |
204 | * |
205 | * The _GTF method has no input parameters. |
206 | * It returns a variable number of register set values (registers |
207 | * hex 1F1..1F7, taskfiles). |
208 | * The <variable number> is not known in advance, so have ACPI-CA |
209 | * allocate the buffer as needed and return it, then free it later. |
210 | * |
211 | * The returned @gtf_length and @gtf_address are only valid if the |
212 | * function return value is 0. |
213 | */ |
214 | static int do_drive_get_GTF(ide_drive_t *drive, |
215 | unsigned int *gtf_length, unsigned long *gtf_address, |
216 | unsigned long *obj_loc) |
217 | { |
218 | acpi_status status; |
219 | struct acpi_buffer output; |
220 | union acpi_object *out_obj; |
221 | int err = -ENODEV; |
222 | |
223 | *gtf_length = 0; |
224 | *gtf_address = 0UL; |
225 | *obj_loc = 0UL; |
226 | |
227 | if (!drive->acpidata->obj_handle) { |
228 | DEBPRINT("No ACPI object found for %s\n", drive->name); |
229 | goto out; |
230 | } |
231 | |
232 | /* Setting up output buffer */ |
233 | output.length = ACPI_ALLOCATE_BUFFER; |
234 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ |
235 | |
236 | /* _GTF has no input parameters */ |
237 | err = -EIO; |
238 | status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF", |
239 | NULL, &output); |
240 | if (ACPI_FAILURE(status)) { |
241 | printk(KERN_DEBUG |
242 | "%s: Run _GTF error: status = 0x%x\n", |
243 | __func__, status); |
244 | goto out; |
245 | } |
246 | |
247 | if (!output.length || !output.pointer) { |
248 | DEBPRINT("Run _GTF: " |
249 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
250 | (unsigned long long)output.length, |
251 | output.pointer); |
252 | goto out; |
253 | } |
254 | |
255 | out_obj = output.pointer; |
256 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
257 | DEBPRINT("Run _GTF: error: " |
258 | "expected object type of ACPI_TYPE_BUFFER, " |
259 | "got 0x%x\n", out_obj->type); |
260 | err = -ENOENT; |
261 | kfree(output.pointer); |
262 | goto out; |
263 | } |
264 | |
265 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || |
266 | out_obj->buffer.length % REGS_PER_GTF) { |
267 | printk(KERN_ERR |
268 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", |
269 | __func__, out_obj->buffer.length, |
270 | out_obj->buffer.pointer); |
271 | err = -ENOENT; |
272 | kfree(output.pointer); |
273 | goto out; |
274 | } |
275 | |
276 | *gtf_length = out_obj->buffer.length; |
277 | *gtf_address = (unsigned long)out_obj->buffer.pointer; |
278 | *obj_loc = (unsigned long)out_obj; |
279 | DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", |
280 | *gtf_length, *gtf_address, *obj_loc); |
281 | err = 0; |
282 | out: |
283 | return err; |
284 | } |
285 | |
286 | /** |
287 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF |
288 | * @drive: the drive to which the taskfile command should be sent |
289 | * @gtf_length: total number of bytes of _GTF taskfiles |
290 | * @gtf_address: location of _GTF taskfile arrays |
291 | * |
292 | * Write {gtf_address, length gtf_length} in groups of |
293 | * REGS_PER_GTF bytes. |
294 | */ |
295 | static int do_drive_set_taskfiles(ide_drive_t *drive, |
296 | unsigned int gtf_length, |
297 | unsigned long gtf_address) |
298 | { |
299 | int rc = 0, err; |
300 | int gtf_count = gtf_length / REGS_PER_GTF; |
301 | int ix; |
302 | |
303 | DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", |
304 | gtf_length, gtf_length, gtf_count, gtf_address); |
305 | |
306 | /* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */ |
307 | for (ix = 0; ix < gtf_count; ix++) { |
308 | u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF); |
309 | struct ide_cmd cmd; |
310 | |
311 | DEBPRINT("(0x1f1-1f7): " |
312 | "hex: %02x %02x %02x %02x %02x %02x %02x\n", |
313 | gtf[0], gtf[1], gtf[2], |
314 | gtf[3], gtf[4], gtf[5], gtf[6]); |
315 | |
316 | if (!ide_acpigtf) { |
317 | DEBPRINT("_GTF execution disabled\n"); |
318 | continue; |
319 | } |
320 | |
321 | /* convert GTF to taskfile */ |
322 | memset(&cmd, 0, sizeof(cmd)); |
323 | memcpy(&cmd.tf.feature, gtf, REGS_PER_GTF); |
324 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
325 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
326 | |
327 | err = ide_no_data_taskfile(drive, &cmd); |
328 | if (err) { |
329 | printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", |
330 | __func__, err); |
331 | rc = err; |
332 | } |
333 | } |
334 | |
335 | return rc; |
336 | } |
337 | |
338 | /** |
339 | * ide_acpi_exec_tfs - get then write drive taskfile settings |
340 | * @drive: the drive for which the taskfile settings should be |
341 | * written. |
342 | * |
343 | * According to the ACPI spec this should be called after _STM |
344 | * has been evaluated for the interface. Some ACPI vendors interpret |
345 | * that as a hard requirement and modify the taskfile according |
346 | * to the Identify Drive information passed down with _STM. |
347 | * So one should really make sure to call this only after _STM has |
348 | * been executed. |
349 | */ |
350 | int ide_acpi_exec_tfs(ide_drive_t *drive) |
351 | { |
352 | int ret; |
353 | unsigned int gtf_length; |
354 | unsigned long gtf_address; |
355 | unsigned long obj_loc; |
356 | |
357 | DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); |
358 | |
359 | ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); |
360 | if (ret < 0) { |
361 | DEBPRINT("get_GTF error (%d)\n", ret); |
362 | return ret; |
363 | } |
364 | |
365 | DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); |
366 | |
367 | ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); |
368 | kfree((void *)obj_loc); |
369 | if (ret < 0) { |
370 | DEBPRINT("set_taskfiles error (%d)\n", ret); |
371 | } |
372 | |
373 | DEBPRINT("ret=%d\n", ret); |
374 | |
375 | return ret; |
376 | } |
377 | |
378 | /** |
379 | * ide_acpi_get_timing - get the channel (controller) timings |
380 | * @hwif: target IDE interface (channel) |
381 | * |
382 | * This function executes the _GTM ACPI method for the target channel. |
383 | * |
384 | */ |
385 | void ide_acpi_get_timing(ide_hwif_t *hwif) |
386 | { |
387 | acpi_status status; |
388 | struct acpi_buffer output; |
389 | union acpi_object *out_obj; |
390 | |
391 | /* Setting up output buffer for _GTM */ |
392 | output.length = ACPI_ALLOCATE_BUFFER; |
393 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ |
394 | |
395 | /* _GTM has no input parameters */ |
396 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", |
397 | NULL, &output); |
398 | |
399 | DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", |
400 | status, output.pointer, |
401 | (unsigned long long)output.length); |
402 | |
403 | if (ACPI_FAILURE(status)) { |
404 | DEBPRINT("Run _GTM error: status = 0x%x\n", status); |
405 | return; |
406 | } |
407 | |
408 | if (!output.length || !output.pointer) { |
409 | DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", |
410 | (unsigned long long)output.length, |
411 | output.pointer); |
412 | kfree(output.pointer); |
413 | return; |
414 | } |
415 | |
416 | out_obj = output.pointer; |
417 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
418 | kfree(output.pointer); |
419 | DEBPRINT("Run _GTM: error: " |
420 | "expected object type of ACPI_TYPE_BUFFER, " |
421 | "got 0x%x\n", out_obj->type); |
422 | return; |
423 | } |
424 | |
425 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || |
426 | out_obj->buffer.length != sizeof(struct GTM_buffer)) { |
427 | kfree(output.pointer); |
428 | printk(KERN_ERR |
429 | "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " |
430 | "addr (0x%p)\n", |
431 | __func__, out_obj->buffer.length, |
432 | sizeof(struct GTM_buffer), out_obj->buffer.pointer); |
433 | return; |
434 | } |
435 | |
436 | memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, |
437 | sizeof(struct GTM_buffer)); |
438 | |
439 | DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n", |
440 | out_obj->buffer.pointer, out_obj->buffer.length, |
441 | sizeof(struct GTM_buffer)); |
442 | |
443 | DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", |
444 | hwif->acpidata->gtm.PIO_speed0, |
445 | hwif->acpidata->gtm.DMA_speed0, |
446 | hwif->acpidata->gtm.PIO_speed1, |
447 | hwif->acpidata->gtm.DMA_speed1, |
448 | hwif->acpidata->gtm.GTM_flags); |
449 | |
450 | kfree(output.pointer); |
451 | } |
452 | |
453 | /** |
454 | * ide_acpi_push_timing - set the channel (controller) timings |
455 | * @hwif: target IDE interface (channel) |
456 | * |
457 | * This function executes the _STM ACPI method for the target channel. |
458 | * |
459 | * _STM requires Identify Drive data, which has to passed as an argument. |
460 | * Unfortunately drive->id is a mangled version which we can't readily |
461 | * use; hence we'll get the information afresh. |
462 | */ |
463 | void ide_acpi_push_timing(ide_hwif_t *hwif) |
464 | { |
465 | acpi_status status; |
466 | struct acpi_object_list input; |
467 | union acpi_object in_params[3]; |
468 | struct ide_acpi_drive_link *master = &hwif->acpidata->master; |
469 | struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; |
470 | |
471 | /* Give the GTM buffer + drive Identify data to the channel via the |
472 | * _STM method: */ |
473 | /* setup input parameters buffer for _STM */ |
474 | input.count = 3; |
475 | input.pointer = in_params; |
476 | in_params[0].type = ACPI_TYPE_BUFFER; |
477 | in_params[0].buffer.length = sizeof(struct GTM_buffer); |
478 | in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; |
479 | in_params[1].type = ACPI_TYPE_BUFFER; |
480 | in_params[1].buffer.length = ATA_ID_WORDS * 2; |
481 | in_params[1].buffer.pointer = (u8 *)&master->idbuff; |
482 | in_params[2].type = ACPI_TYPE_BUFFER; |
483 | in_params[2].buffer.length = ATA_ID_WORDS * 2; |
484 | in_params[2].buffer.pointer = (u8 *)&slave->idbuff; |
485 | /* Output buffer: _STM has no output */ |
486 | |
487 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", |
488 | &input, NULL); |
489 | |
490 | if (ACPI_FAILURE(status)) { |
491 | DEBPRINT("Run _STM error: status = 0x%x\n", status); |
492 | } |
493 | DEBPRINT("_STM status: %d\n", status); |
494 | } |
495 | |
496 | /** |
497 | * ide_acpi_set_state - set the channel power state |
498 | * @hwif: target IDE interface |
499 | * @on: state, on/off |
500 | * |
501 | * This function executes the _PS0/_PS3 ACPI method to set the power state. |
502 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off |
503 | */ |
504 | void ide_acpi_set_state(ide_hwif_t *hwif, int on) |
505 | { |
506 | ide_drive_t *drive; |
507 | int i; |
508 | |
509 | if (ide_noacpi_psx) |
510 | return; |
511 | |
512 | DEBPRINT("ENTER:\n"); |
513 | |
514 | /* channel first and then drives for power on and verse versa for power off */ |
515 | if (on) |
516 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); |
517 | |
518 | ide_port_for_each_present_dev(i, drive, hwif) { |
519 | if (drive->acpidata->obj_handle) |
520 | acpi_bus_set_power(drive->acpidata->obj_handle, |
521 | on ? ACPI_STATE_D0 : ACPI_STATE_D3); |
522 | } |
523 | |
524 | if (!on) |
525 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); |
526 | } |
527 | |
528 | /** |
529 | * ide_acpi_init_port - initialize the ACPI link for an IDE interface |
530 | * @hwif: target IDE interface (channel) |
531 | * |
532 | * The ACPI spec is not quite clear when the drive identify buffer |
533 | * should be obtained. Calling IDENTIFY DEVICE during shutdown |
534 | * is not the best of ideas as the drive might already being put to |
535 | * sleep. And obviously we can't call it during resume. |
536 | * So we get the information during startup; but this means that |
537 | * any changes during run-time will be lost after resume. |
538 | */ |
539 | void ide_acpi_init_port(ide_hwif_t *hwif) |
540 | { |
541 | hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); |
542 | if (!hwif->acpidata) |
543 | return; |
544 | |
545 | hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); |
546 | if (!hwif->acpidata->obj_handle) { |
547 | DEBPRINT("no ACPI object for %s found\n", hwif->name); |
548 | kfree(hwif->acpidata); |
549 | hwif->acpidata = NULL; |
550 | } |
551 | } |
552 | |
553 | void ide_acpi_port_init_devices(ide_hwif_t *hwif) |
554 | { |
555 | ide_drive_t *drive; |
556 | int i, err; |
557 | |
558 | if (hwif->acpidata == NULL) |
559 | return; |
560 | |
561 | /* |
562 | * The ACPI spec mandates that we send information |
563 | * for both drives, regardless whether they are connected |
564 | * or not. |
565 | */ |
566 | hwif->devices[0]->acpidata = &hwif->acpidata->master; |
567 | hwif->devices[1]->acpidata = &hwif->acpidata->slave; |
568 | |
569 | /* get _ADR info for each device */ |
570 | ide_port_for_each_present_dev(i, drive, hwif) { |
571 | acpi_handle dev_handle; |
572 | |
573 | DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", |
574 | drive->name, hwif->channel, drive->dn & 1); |
575 | |
576 | /* TBD: could also check ACPI object VALID bits */ |
577 | dev_handle = acpi_get_child(hwif->acpidata->obj_handle, |
578 | drive->dn & 1); |
579 | |
580 | DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle); |
581 | |
582 | drive->acpidata->obj_handle = dev_handle; |
583 | } |
584 | |
585 | /* send IDENTIFY for each device */ |
586 | ide_port_for_each_present_dev(i, drive, hwif) { |
587 | err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff); |
588 | if (err) |
589 | DEBPRINT("identify device %s failed (%d)\n", |
590 | drive->name, err); |
591 | } |
592 | |
593 | if (ide_noacpi || ide_acpionboot == 0) { |
594 | DEBPRINT("ACPI methods disabled on boot\n"); |
595 | return; |
596 | } |
597 | |
598 | /* ACPI _PS0 before _STM */ |
599 | ide_acpi_set_state(hwif, 1); |
600 | /* |
601 | * ACPI requires us to call _STM on startup |
602 | */ |
603 | ide_acpi_get_timing(hwif); |
604 | ide_acpi_push_timing(hwif); |
605 | |
606 | ide_port_for_each_present_dev(i, drive, hwif) { |
607 | ide_acpi_exec_tfs(drive); |
608 | } |
609 | } |
610 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9