Commit | Line | Data |
---|---|---|
e3a59b4d | 1 | /* |
e3a59b4d HR |
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> | |
90494893 | 18 | #include <linux/dmi.h> |
e3a59b4d HR |
19 | |
20 | #include <acpi/acpi_bus.h> | |
e3a59b4d HR |
21 | |
22 | #define REGS_PER_GTF 7 | |
23 | struct taskfile_array { | |
24 | u8 tfa[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
25 | }; | |
26 | ||
27 | struct GTM_buffer { | |
28 | u32 PIO_speed0; | |
29 | u32 DMA_speed0; | |
30 | u32 PIO_speed1; | |
31 | u32 DMA_speed1; | |
32 | u32 GTM_flags; | |
33 | }; | |
34 | ||
35 | struct ide_acpi_drive_link { | |
e3a59b4d HR |
36 | acpi_handle obj_handle; |
37 | u8 idbuff[512]; | |
38 | }; | |
39 | ||
40 | struct ide_acpi_hwif_link { | |
41 | ide_hwif_t *hwif; | |
42 | acpi_handle obj_handle; | |
43 | struct GTM_buffer gtm; | |
44 | struct ide_acpi_drive_link master; | |
45 | struct ide_acpi_drive_link slave; | |
46 | }; | |
47 | ||
48 | #undef DEBUGGING | |
49 | /* note: adds function name and KERN_DEBUG */ | |
50 | #ifdef DEBUGGING | |
51 | #define DEBPRINT(fmt, args...) \ | |
eb63963a | 52 | printk(KERN_DEBUG "%s: " fmt, __func__, ## args) |
e3a59b4d HR |
53 | #else |
54 | #define DEBPRINT(fmt, args...) do {} while (0) | |
55 | #endif /* DEBUGGING */ | |
56 | ||
931ee0dc | 57 | static int ide_noacpi; |
1dbfeb4b BZ |
58 | module_param_named(noacpi, ide_noacpi, bool, 0); |
59 | MODULE_PARM_DESC(noacpi, "disable IDE ACPI support"); | |
60 | ||
931ee0dc | 61 | static int ide_acpigtf; |
1dbfeb4b BZ |
62 | module_param_named(acpigtf, ide_acpigtf, bool, 0); |
63 | MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support"); | |
64 | ||
931ee0dc | 65 | static int ide_acpionboot; |
1dbfeb4b BZ |
66 | module_param_named(acpionboot, ide_acpionboot, bool, 0); |
67 | MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot"); | |
e3a59b4d | 68 | |
90494893 SL |
69 | static bool ide_noacpi_psx; |
70 | static int no_acpi_psx(const struct dmi_system_id *id) | |
71 | { | |
72 | ide_noacpi_psx = true; | |
73 | printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident); | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static const struct dmi_system_id ide_acpi_dmi_table[] = { | |
78 | /* Bug 9673. */ | |
79 | /* We should check if this is because ACPI NVS isn't save/restored. */ | |
80 | { | |
81 | .callback = no_acpi_psx, | |
82 | .ident = "HP nx9005", | |
83 | .matches = { | |
84 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."), | |
85 | DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60") | |
86 | }, | |
87 | }, | |
7c48c56e JG |
88 | |
89 | { } /* terminate list */ | |
90494893 SL |
90 | }; |
91 | ||
8b803bd1 | 92 | int ide_acpi_init(void) |
90494893 | 93 | { |
90494893 SL |
94 | dmi_check_system(ide_acpi_dmi_table); |
95 | return 0; | |
96 | } | |
97 | ||
e3a59b4d HR |
98 | /** |
99 | * ide_get_dev_handle - finds acpi_handle and PCI device.function | |
100 | * @dev: device to locate | |
101 | * @handle: returned acpi_handle for @dev | |
102 | * @pcidevfn: return PCI device.func for @dev | |
103 | * | |
104 | * Returns the ACPI object handle to the corresponding PCI device. | |
105 | * | |
106 | * Returns 0 on success, <0 on error. | |
107 | */ | |
108 | static int ide_get_dev_handle(struct device *dev, acpi_handle *handle, | |
109 | acpi_integer *pcidevfn) | |
110 | { | |
111 | struct pci_dev *pdev = to_pci_dev(dev); | |
112 | unsigned int bus, devnum, func; | |
113 | acpi_integer addr; | |
114 | acpi_handle dev_handle; | |
115 | struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER, | |
116 | .pointer = NULL}; | |
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, &buffer); | |
136 | if (ACPI_FAILURE(status)) { | |
137 | DEBPRINT("get_object_info for device failed\n"); | |
138 | goto err; | |
139 | } | |
140 | dinfo = buffer.pointer; | |
141 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && | |
142 | dinfo->address == addr) { | |
143 | *pcidevfn = addr; | |
144 | *handle = dev_handle; | |
145 | } else { | |
146 | DEBPRINT("get_object_info for device has wrong " | |
147 | " address: %llu, should be %u\n", | |
148 | dinfo ? (unsigned long long)dinfo->address : -1ULL, | |
149 | (unsigned int)addr); | |
150 | goto err; | |
151 | } | |
152 | ||
153 | DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n", | |
154 | devnum, func, (unsigned long long)addr, *handle); | |
155 | ret = 0; | |
156 | err: | |
157 | kfree(dinfo); | |
158 | return ret; | |
159 | } | |
160 | ||
161 | /** | |
162 | * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif | |
163 | * @hwif: device to locate | |
164 | * | |
165 | * Retrieves the object handle for a given hwif. | |
166 | * | |
167 | * Returns handle on success, 0 on error. | |
168 | */ | |
169 | static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) | |
170 | { | |
171 | struct device *dev = hwif->gendev.parent; | |
1dcfdf93 | 172 | acpi_handle uninitialized_var(dev_handle); |
e3a59b4d HR |
173 | acpi_integer pcidevfn; |
174 | acpi_handle chan_handle; | |
175 | int err; | |
176 | ||
177 | DEBPRINT("ENTER: device %s\n", hwif->name); | |
178 | ||
179 | if (!dev) { | |
180 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
181 | return NULL; | |
182 | } | |
183 | ||
184 | err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn); | |
185 | if (err < 0) { | |
186 | DEBPRINT("ide_get_dev_handle failed (%d)\n", err); | |
187 | return NULL; | |
188 | } | |
189 | ||
190 | /* get child objects of dev_handle == channel objects, | |
191 | * + _their_ children == drive objects */ | |
192 | /* channel is hwif->channel */ | |
193 | chan_handle = acpi_get_child(dev_handle, hwif->channel); | |
194 | DEBPRINT("chan adr=%d: handle=0x%p\n", | |
195 | hwif->channel, chan_handle); | |
196 | ||
197 | return chan_handle; | |
198 | } | |
199 | ||
e3a59b4d HR |
200 | /** |
201 | * do_drive_get_GTF - get the drive bootup default taskfile settings | |
202 | * @drive: the drive for which the taskfile settings should be retrieved | |
203 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address | |
204 | * @gtf_address: buffer containing _GTF taskfile arrays | |
205 | * | |
206 | * The _GTF method has no input parameters. | |
207 | * It returns a variable number of register set values (registers | |
208 | * hex 1F1..1F7, taskfiles). | |
209 | * The <variable number> is not known in advance, so have ACPI-CA | |
210 | * allocate the buffer as needed and return it, then free it later. | |
211 | * | |
212 | * The returned @gtf_length and @gtf_address are only valid if the | |
213 | * function return value is 0. | |
214 | */ | |
215 | static int do_drive_get_GTF(ide_drive_t *drive, | |
216 | unsigned int *gtf_length, unsigned long *gtf_address, | |
217 | unsigned long *obj_loc) | |
218 | { | |
219 | acpi_status status; | |
220 | struct acpi_buffer output; | |
221 | union acpi_object *out_obj; | |
e3a59b4d | 222 | int err = -ENODEV; |
e3a59b4d HR |
223 | |
224 | *gtf_length = 0; | |
225 | *gtf_address = 0UL; | |
226 | *obj_loc = 0UL; | |
227 | ||
e3a59b4d | 228 | if (!drive->acpidata->obj_handle) { |
8cd3c605 BZ |
229 | DEBPRINT("No ACPI object found for %s\n", drive->name); |
230 | goto out; | |
e3a59b4d HR |
231 | } |
232 | ||
233 | /* Setting up output buffer */ | |
234 | output.length = ACPI_ALLOCATE_BUFFER; | |
235 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
236 | ||
237 | /* _GTF has no input parameters */ | |
238 | err = -EIO; | |
239 | status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF", | |
240 | NULL, &output); | |
241 | if (ACPI_FAILURE(status)) { | |
242 | printk(KERN_DEBUG | |
243 | "%s: Run _GTF error: status = 0x%x\n", | |
eb63963a | 244 | __func__, status); |
e3a59b4d HR |
245 | goto out; |
246 | } | |
247 | ||
248 | if (!output.length || !output.pointer) { | |
249 | DEBPRINT("Run _GTF: " | |
250 | "length or ptr is NULL (0x%llx, 0x%p)\n", | |
251 | (unsigned long long)output.length, | |
252 | output.pointer); | |
253 | goto out; | |
254 | } | |
255 | ||
256 | out_obj = output.pointer; | |
257 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
258 | DEBPRINT("Run _GTF: error: " | |
259 | "expected object type of ACPI_TYPE_BUFFER, " | |
260 | "got 0x%x\n", out_obj->type); | |
261 | err = -ENOENT; | |
262 | kfree(output.pointer); | |
263 | goto out; | |
264 | } | |
265 | ||
266 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
267 | out_obj->buffer.length % REGS_PER_GTF) { | |
268 | printk(KERN_ERR | |
269 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", | |
eb63963a | 270 | __func__, out_obj->buffer.length, |
e3a59b4d HR |
271 | out_obj->buffer.pointer); |
272 | err = -ENOENT; | |
273 | kfree(output.pointer); | |
274 | goto out; | |
275 | } | |
276 | ||
277 | *gtf_length = out_obj->buffer.length; | |
278 | *gtf_address = (unsigned long)out_obj->buffer.pointer; | |
279 | *obj_loc = (unsigned long)out_obj; | |
280 | DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", | |
281 | *gtf_length, *gtf_address, *obj_loc); | |
282 | err = 0; | |
283 | out: | |
284 | return err; | |
285 | } | |
286 | ||
287 | /** | |
288 | * taskfile_load_raw - send taskfile registers to drive | |
289 | * @drive: drive to which output is sent | |
290 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) | |
291 | * | |
292 | * Outputs IDE taskfile to the drive. | |
293 | */ | |
294 | static int taskfile_load_raw(ide_drive_t *drive, | |
295 | const struct taskfile_array *gtf) | |
296 | { | |
297 | ide_task_t args; | |
298 | int err = 0; | |
299 | ||
300 | DEBPRINT("(0x1f1-1f7): hex: " | |
301 | "%02x %02x %02x %02x %02x %02x %02x\n", | |
302 | gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], | |
303 | gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); | |
304 | ||
305 | memset(&args, 0, sizeof(ide_task_t)); | |
e3a59b4d HR |
306 | |
307 | /* convert gtf to IDE Taskfile */ | |
650d841d | 308 | memcpy(&args.tf_array[7], >f->tfa, 7); |
657cc1a8 | 309 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
e3a59b4d | 310 | |
1dbfeb4b | 311 | if (!ide_acpigtf) { |
e3a59b4d HR |
312 | DEBPRINT("_GTF execution disabled\n"); |
313 | return err; | |
314 | } | |
315 | ||
9a3c49be | 316 | err = ide_no_data_taskfile(drive, &args); |
e3a59b4d | 317 | if (err) |
9a3c49be | 318 | printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", |
eb63963a | 319 | __func__, err); |
e3a59b4d HR |
320 | |
321 | return err; | |
322 | } | |
323 | ||
324 | /** | |
325 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF | |
326 | * @drive: the drive to which the taskfile command should be sent | |
327 | * @gtf_length: total number of bytes of _GTF taskfiles | |
328 | * @gtf_address: location of _GTF taskfile arrays | |
329 | * | |
330 | * Write {gtf_address, length gtf_length} in groups of | |
331 | * REGS_PER_GTF bytes. | |
332 | */ | |
333 | static int do_drive_set_taskfiles(ide_drive_t *drive, | |
334 | unsigned int gtf_length, | |
335 | unsigned long gtf_address) | |
336 | { | |
1f5892a5 | 337 | int rc = 0, err; |
e3a59b4d HR |
338 | int gtf_count = gtf_length / REGS_PER_GTF; |
339 | int ix; | |
340 | struct taskfile_array *gtf; | |
341 | ||
e3a59b4d HR |
342 | DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", |
343 | gtf_length, gtf_length, gtf_count, gtf_address); | |
344 | ||
e3a59b4d HR |
345 | for (ix = 0; ix < gtf_count; ix++) { |
346 | gtf = (struct taskfile_array *) | |
347 | (gtf_address + ix * REGS_PER_GTF); | |
348 | ||
349 | /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ | |
350 | err = taskfile_load_raw(drive, gtf); | |
351 | if (err) | |
352 | rc = err; | |
353 | } | |
354 | ||
e3a59b4d HR |
355 | return rc; |
356 | } | |
357 | ||
358 | /** | |
359 | * ide_acpi_exec_tfs - get then write drive taskfile settings | |
360 | * @drive: the drive for which the taskfile settings should be | |
361 | * written. | |
362 | * | |
363 | * According to the ACPI spec this should be called after _STM | |
364 | * has been evaluated for the interface. Some ACPI vendors interpret | |
365 | * that as a hard requirement and modify the taskfile according | |
366 | * to the Identify Drive information passed down with _STM. | |
367 | * So one should really make sure to call this only after _STM has | |
368 | * been executed. | |
369 | */ | |
370 | int ide_acpi_exec_tfs(ide_drive_t *drive) | |
371 | { | |
372 | int ret; | |
373 | unsigned int gtf_length; | |
374 | unsigned long gtf_address; | |
375 | unsigned long obj_loc; | |
376 | ||
377 | if (ide_noacpi) | |
378 | return 0; | |
379 | ||
380 | DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); | |
381 | ||
382 | ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); | |
383 | if (ret < 0) { | |
384 | DEBPRINT("get_GTF error (%d)\n", ret); | |
385 | return ret; | |
386 | } | |
387 | ||
388 | DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); | |
389 | ||
390 | ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); | |
391 | kfree((void *)obj_loc); | |
392 | if (ret < 0) { | |
393 | DEBPRINT("set_taskfiles error (%d)\n", ret); | |
394 | } | |
395 | ||
396 | DEBPRINT("ret=%d\n", ret); | |
397 | ||
398 | return ret; | |
399 | } | |
e3a59b4d HR |
400 | |
401 | /** | |
402 | * ide_acpi_get_timing - get the channel (controller) timings | |
403 | * @hwif: target IDE interface (channel) | |
404 | * | |
405 | * This function executes the _GTM ACPI method for the target channel. | |
406 | * | |
407 | */ | |
408 | void ide_acpi_get_timing(ide_hwif_t *hwif) | |
409 | { | |
410 | acpi_status status; | |
411 | struct acpi_buffer output; | |
412 | union acpi_object *out_obj; | |
413 | ||
414 | if (ide_noacpi) | |
415 | return; | |
416 | ||
417 | DEBPRINT("ENTER:\n"); | |
418 | ||
419 | if (!hwif->acpidata) { | |
420 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
421 | return; | |
422 | } | |
423 | ||
424 | /* Setting up output buffer for _GTM */ | |
425 | output.length = ACPI_ALLOCATE_BUFFER; | |
426 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
427 | ||
428 | /* _GTM has no input parameters */ | |
429 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", | |
430 | NULL, &output); | |
431 | ||
432 | DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", | |
433 | status, output.pointer, | |
434 | (unsigned long long)output.length); | |
435 | ||
436 | if (ACPI_FAILURE(status)) { | |
437 | DEBPRINT("Run _GTM error: status = 0x%x\n", status); | |
438 | return; | |
439 | } | |
440 | ||
441 | if (!output.length || !output.pointer) { | |
442 | DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", | |
443 | (unsigned long long)output.length, | |
444 | output.pointer); | |
445 | kfree(output.pointer); | |
446 | return; | |
447 | } | |
448 | ||
449 | out_obj = output.pointer; | |
450 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
451 | kfree(output.pointer); | |
452 | DEBPRINT("Run _GTM: error: " | |
453 | "expected object type of ACPI_TYPE_BUFFER, " | |
454 | "got 0x%x\n", out_obj->type); | |
455 | return; | |
456 | } | |
457 | ||
458 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
459 | out_obj->buffer.length != sizeof(struct GTM_buffer)) { | |
460 | kfree(output.pointer); | |
461 | printk(KERN_ERR | |
1e8f34f7 AM |
462 | "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " |
463 | "addr (0x%p)\n", | |
eb63963a | 464 | __func__, out_obj->buffer.length, |
1e8f34f7 | 465 | sizeof(struct GTM_buffer), out_obj->buffer.pointer); |
e3a59b4d HR |
466 | return; |
467 | } | |
468 | ||
469 | memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, | |
470 | sizeof(struct GTM_buffer)); | |
471 | ||
472 | DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n", | |
473 | out_obj->buffer.pointer, out_obj->buffer.length, | |
474 | sizeof(struct GTM_buffer)); | |
475 | ||
476 | DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", | |
477 | hwif->acpidata->gtm.PIO_speed0, | |
478 | hwif->acpidata->gtm.DMA_speed0, | |
479 | hwif->acpidata->gtm.PIO_speed1, | |
480 | hwif->acpidata->gtm.DMA_speed1, | |
481 | hwif->acpidata->gtm.GTM_flags); | |
482 | ||
483 | kfree(output.pointer); | |
484 | } | |
e3a59b4d HR |
485 | |
486 | /** | |
487 | * ide_acpi_push_timing - set the channel (controller) timings | |
488 | * @hwif: target IDE interface (channel) | |
489 | * | |
490 | * This function executes the _STM ACPI method for the target channel. | |
491 | * | |
492 | * _STM requires Identify Drive data, which has to passed as an argument. | |
4dde4492 | 493 | * Unfortunately drive->id is a mangled version which we can't readily |
e3a59b4d HR |
494 | * use; hence we'll get the information afresh. |
495 | */ | |
496 | void ide_acpi_push_timing(ide_hwif_t *hwif) | |
497 | { | |
498 | acpi_status status; | |
499 | struct acpi_object_list input; | |
500 | union acpi_object in_params[3]; | |
501 | struct ide_acpi_drive_link *master = &hwif->acpidata->master; | |
502 | struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; | |
503 | ||
504 | if (ide_noacpi) | |
505 | return; | |
506 | ||
507 | DEBPRINT("ENTER:\n"); | |
508 | ||
509 | if (!hwif->acpidata) { | |
510 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
511 | return; | |
512 | } | |
513 | ||
514 | /* Give the GTM buffer + drive Identify data to the channel via the | |
515 | * _STM method: */ | |
516 | /* setup input parameters buffer for _STM */ | |
517 | input.count = 3; | |
518 | input.pointer = in_params; | |
519 | in_params[0].type = ACPI_TYPE_BUFFER; | |
520 | in_params[0].buffer.length = sizeof(struct GTM_buffer); | |
521 | in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; | |
522 | in_params[1].type = ACPI_TYPE_BUFFER; | |
0e63a588 | 523 | in_params[1].buffer.length = ATA_ID_WORDS * 2; |
e3a59b4d HR |
524 | in_params[1].buffer.pointer = (u8 *)&master->idbuff; |
525 | in_params[2].type = ACPI_TYPE_BUFFER; | |
0e63a588 | 526 | in_params[2].buffer.length = ATA_ID_WORDS * 2; |
e3a59b4d HR |
527 | in_params[2].buffer.pointer = (u8 *)&slave->idbuff; |
528 | /* Output buffer: _STM has no output */ | |
529 | ||
530 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", | |
531 | &input, NULL); | |
532 | ||
533 | if (ACPI_FAILURE(status)) { | |
534 | DEBPRINT("Run _STM error: status = 0x%x\n", status); | |
535 | } | |
536 | DEBPRINT("_STM status: %d\n", status); | |
537 | } | |
e3a59b4d | 538 | |
5e32132b SL |
539 | /** |
540 | * ide_acpi_set_state - set the channel power state | |
541 | * @hwif: target IDE interface | |
542 | * @on: state, on/off | |
543 | * | |
544 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
545 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
546 | */ | |
547 | void ide_acpi_set_state(ide_hwif_t *hwif, int on) | |
548 | { | |
2bd24a1c BZ |
549 | ide_drive_t *drive; |
550 | int i; | |
5e32132b | 551 | |
90494893 | 552 | if (ide_noacpi || ide_noacpi_psx) |
5e32132b SL |
553 | return; |
554 | ||
555 | DEBPRINT("ENTER:\n"); | |
556 | ||
557 | if (!hwif->acpidata) { | |
558 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
559 | return; | |
560 | } | |
7ed5b157 | 561 | |
5e32132b SL |
562 | /* channel first and then drives for power on and verse versa for power off */ |
563 | if (on) | |
564 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); | |
5e32132b | 565 | |
7ed5b157 BZ |
566 | ide_port_for_each_present_dev(i, drive, hwif) { |
567 | if (drive->acpidata->obj_handle) | |
5e32132b | 568 | acpi_bus_set_power(drive->acpidata->obj_handle, |
7ed5b157 | 569 | on ? ACPI_STATE_D0 : ACPI_STATE_D3); |
5e32132b | 570 | } |
7ed5b157 | 571 | |
5e32132b SL |
572 | if (!on) |
573 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); | |
574 | } | |
5e32132b | 575 | |
e3a59b4d | 576 | /** |
8b803bd1 | 577 | * ide_acpi_init_port - initialize the ACPI link for an IDE interface |
e3a59b4d HR |
578 | * @hwif: target IDE interface (channel) |
579 | * | |
580 | * The ACPI spec is not quite clear when the drive identify buffer | |
581 | * should be obtained. Calling IDENTIFY DEVICE during shutdown | |
582 | * is not the best of ideas as the drive might already being put to | |
583 | * sleep. And obviously we can't call it during resume. | |
584 | * So we get the information during startup; but this means that | |
585 | * any changes during run-time will be lost after resume. | |
586 | */ | |
8b803bd1 | 587 | void ide_acpi_init_port(ide_hwif_t *hwif) |
e3a59b4d | 588 | { |
e3a59b4d HR |
589 | hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); |
590 | if (!hwif->acpidata) | |
591 | return; | |
592 | ||
593 | hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); | |
594 | if (!hwif->acpidata->obj_handle) { | |
595 | DEBPRINT("no ACPI object for %s found\n", hwif->name); | |
596 | kfree(hwif->acpidata); | |
597 | hwif->acpidata = NULL; | |
e3a59b4d | 598 | } |
eafd88a3 BZ |
599 | } |
600 | ||
601 | void ide_acpi_port_init_devices(ide_hwif_t *hwif) | |
602 | { | |
603 | ide_drive_t *drive; | |
604 | int i, err; | |
605 | ||
606 | if (hwif->acpidata == NULL) | |
607 | return; | |
e3a59b4d HR |
608 | |
609 | /* | |
610 | * The ACPI spec mandates that we send information | |
611 | * for both drives, regardless whether they are connected | |
612 | * or not. | |
613 | */ | |
5e7f3a46 BZ |
614 | hwif->devices[0]->acpidata = &hwif->acpidata->master; |
615 | hwif->devices[1]->acpidata = &hwif->acpidata->slave; | |
e3a59b4d | 616 | |
8cd3c605 | 617 | /* get _ADR info for each device */ |
7ed5b157 | 618 | ide_port_for_each_present_dev(i, drive, hwif) { |
8cd3c605 BZ |
619 | acpi_handle dev_handle; |
620 | ||
8cd3c605 BZ |
621 | DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", |
622 | drive->name, hwif->channel, drive->dn & 1); | |
623 | ||
624 | /* TBD: could also check ACPI object VALID bits */ | |
625 | dev_handle = acpi_get_child(hwif->acpidata->obj_handle, | |
626 | drive->dn & 1); | |
627 | ||
628 | DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle); | |
629 | ||
630 | drive->acpidata->obj_handle = dev_handle; | |
631 | } | |
632 | ||
7ed5b157 BZ |
633 | /* send IDENTIFY for each device */ |
634 | ide_port_for_each_present_dev(i, drive, hwif) { | |
eafd88a3 BZ |
635 | err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff); |
636 | if (err) | |
e3a59b4d | 637 | DEBPRINT("identify device %s failed (%d)\n", |
eafd88a3 | 638 | drive->name, err); |
e3a59b4d HR |
639 | } |
640 | ||
1dbfeb4b | 641 | if (!ide_acpionboot) { |
e3a59b4d HR |
642 | DEBPRINT("ACPI methods disabled on boot\n"); |
643 | return; | |
644 | } | |
645 | ||
5e32132b SL |
646 | /* ACPI _PS0 before _STM */ |
647 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d HR |
648 | /* |
649 | * ACPI requires us to call _STM on startup | |
650 | */ | |
651 | ide_acpi_get_timing(hwif); | |
652 | ide_acpi_push_timing(hwif); | |
653 | ||
7ed5b157 BZ |
654 | ide_port_for_each_present_dev(i, drive, hwif) { |
655 | ide_acpi_exec_tfs(drive); | |
e3a59b4d HR |
656 | } |
657 | } |