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> | |
21 | #include <acpi/acnames.h> | |
22 | #include <acpi/acnamesp.h> | |
23 | #include <acpi/acparser.h> | |
24 | #include <acpi/acexcep.h> | |
25 | #include <acpi/acmacros.h> | |
26 | #include <acpi/actypes.h> | |
27 | ||
28 | #define REGS_PER_GTF 7 | |
29 | struct taskfile_array { | |
30 | u8 tfa[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
31 | }; | |
32 | ||
33 | struct GTM_buffer { | |
34 | u32 PIO_speed0; | |
35 | u32 DMA_speed0; | |
36 | u32 PIO_speed1; | |
37 | u32 DMA_speed1; | |
38 | u32 GTM_flags; | |
39 | }; | |
40 | ||
41 | struct ide_acpi_drive_link { | |
e3a59b4d HR |
42 | acpi_handle obj_handle; |
43 | u8 idbuff[512]; | |
44 | }; | |
45 | ||
46 | struct ide_acpi_hwif_link { | |
47 | ide_hwif_t *hwif; | |
48 | acpi_handle obj_handle; | |
49 | struct GTM_buffer gtm; | |
50 | struct ide_acpi_drive_link master; | |
51 | struct ide_acpi_drive_link slave; | |
52 | }; | |
53 | ||
54 | #undef DEBUGGING | |
55 | /* note: adds function name and KERN_DEBUG */ | |
56 | #ifdef DEBUGGING | |
57 | #define DEBPRINT(fmt, args...) \ | |
58 | printk(KERN_DEBUG "%s: " fmt, __FUNCTION__, ## args) | |
59 | #else | |
60 | #define DEBPRINT(fmt, args...) do {} while (0) | |
61 | #endif /* DEBUGGING */ | |
62 | ||
63 | extern int ide_noacpi; | |
64 | extern int ide_noacpitfs; | |
65 | extern int ide_noacpionboot; | |
66 | ||
90494893 SL |
67 | static bool ide_noacpi_psx; |
68 | static int no_acpi_psx(const struct dmi_system_id *id) | |
69 | { | |
70 | ide_noacpi_psx = true; | |
71 | printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident); | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static const struct dmi_system_id ide_acpi_dmi_table[] = { | |
76 | /* Bug 9673. */ | |
77 | /* We should check if this is because ACPI NVS isn't save/restored. */ | |
78 | { | |
79 | .callback = no_acpi_psx, | |
80 | .ident = "HP nx9005", | |
81 | .matches = { | |
82 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."), | |
83 | DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60") | |
84 | }, | |
85 | }, | |
7c48c56e JG |
86 | |
87 | { } /* terminate list */ | |
90494893 SL |
88 | }; |
89 | ||
90 | static int ide_acpi_blacklist(void) | |
91 | { | |
92 | static int done; | |
93 | if (done) | |
94 | return 0; | |
95 | done = 1; | |
96 | dmi_check_system(ide_acpi_dmi_table); | |
97 | return 0; | |
98 | } | |
99 | ||
e3a59b4d HR |
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 | struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER, | |
118 | .pointer = NULL}; | |
119 | acpi_status status; | |
120 | struct acpi_device_info *dinfo = NULL; | |
121 | int ret = -ENODEV; | |
122 | ||
123 | bus = pdev->bus->number; | |
124 | devnum = PCI_SLOT(pdev->devfn); | |
125 | func = PCI_FUNC(pdev->devfn); | |
126 | /* ACPI _ADR encoding for PCI bus: */ | |
127 | addr = (acpi_integer)(devnum << 16 | func); | |
128 | ||
129 | DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func); | |
130 | ||
131 | dev_handle = DEVICE_ACPI_HANDLE(dev); | |
132 | if (!dev_handle) { | |
133 | DEBPRINT("no acpi handle for device\n"); | |
134 | goto err; | |
135 | } | |
136 | ||
137 | status = acpi_get_object_info(dev_handle, &buffer); | |
138 | if (ACPI_FAILURE(status)) { | |
139 | DEBPRINT("get_object_info for device failed\n"); | |
140 | goto err; | |
141 | } | |
142 | dinfo = buffer.pointer; | |
143 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && | |
144 | dinfo->address == addr) { | |
145 | *pcidevfn = addr; | |
146 | *handle = dev_handle; | |
147 | } else { | |
148 | DEBPRINT("get_object_info for device has wrong " | |
149 | " address: %llu, should be %u\n", | |
150 | dinfo ? (unsigned long long)dinfo->address : -1ULL, | |
151 | (unsigned int)addr); | |
152 | goto err; | |
153 | } | |
154 | ||
155 | DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n", | |
156 | devnum, func, (unsigned long long)addr, *handle); | |
157 | ret = 0; | |
158 | err: | |
159 | kfree(dinfo); | |
160 | return ret; | |
161 | } | |
162 | ||
163 | /** | |
164 | * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif | |
165 | * @hwif: device to locate | |
166 | * | |
167 | * Retrieves the object handle for a given hwif. | |
168 | * | |
169 | * Returns handle on success, 0 on error. | |
170 | */ | |
171 | static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) | |
172 | { | |
173 | struct device *dev = hwif->gendev.parent; | |
1dcfdf93 | 174 | acpi_handle uninitialized_var(dev_handle); |
e3a59b4d HR |
175 | acpi_integer pcidevfn; |
176 | acpi_handle chan_handle; | |
177 | int err; | |
178 | ||
179 | DEBPRINT("ENTER: device %s\n", hwif->name); | |
180 | ||
181 | if (!dev) { | |
182 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
183 | return NULL; | |
184 | } | |
185 | ||
186 | err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn); | |
187 | if (err < 0) { | |
188 | DEBPRINT("ide_get_dev_handle failed (%d)\n", err); | |
189 | return NULL; | |
190 | } | |
191 | ||
192 | /* get child objects of dev_handle == channel objects, | |
193 | * + _their_ children == drive objects */ | |
194 | /* channel is hwif->channel */ | |
195 | chan_handle = acpi_get_child(dev_handle, hwif->channel); | |
196 | DEBPRINT("chan adr=%d: handle=0x%p\n", | |
197 | hwif->channel, chan_handle); | |
198 | ||
199 | return chan_handle; | |
200 | } | |
201 | ||
202 | /** | |
203 | * ide_acpi_drive_get_handle - Get ACPI object handle for a given drive | |
204 | * @drive: device to locate | |
205 | * | |
206 | * Retrieves the object handle of a given drive. According to the ACPI | |
207 | * spec the drive is a child of the hwif. | |
208 | * | |
209 | * Returns handle on success, 0 on error. | |
210 | */ | |
211 | static acpi_handle ide_acpi_drive_get_handle(ide_drive_t *drive) | |
212 | { | |
213 | ide_hwif_t *hwif = HWIF(drive); | |
214 | int port; | |
215 | acpi_handle drive_handle; | |
216 | ||
217 | if (!hwif->acpidata) | |
218 | return NULL; | |
219 | ||
220 | if (!hwif->acpidata->obj_handle) | |
221 | return NULL; | |
222 | ||
223 | port = hwif->channel ? drive->dn - 2: drive->dn; | |
224 | ||
225 | DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", | |
226 | drive->name, hwif->channel, port); | |
227 | ||
228 | ||
229 | /* TBD: could also check ACPI object VALID bits */ | |
230 | drive_handle = acpi_get_child(hwif->acpidata->obj_handle, port); | |
231 | DEBPRINT("drive %s handle 0x%p\n", drive->name, drive_handle); | |
232 | ||
233 | return drive_handle; | |
234 | } | |
235 | ||
236 | /** | |
237 | * do_drive_get_GTF - get the drive bootup default taskfile settings | |
238 | * @drive: the drive for which the taskfile settings should be retrieved | |
239 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address | |
240 | * @gtf_address: buffer containing _GTF taskfile arrays | |
241 | * | |
242 | * The _GTF method has no input parameters. | |
243 | * It returns a variable number of register set values (registers | |
244 | * hex 1F1..1F7, taskfiles). | |
245 | * The <variable number> is not known in advance, so have ACPI-CA | |
246 | * allocate the buffer as needed and return it, then free it later. | |
247 | * | |
248 | * The returned @gtf_length and @gtf_address are only valid if the | |
249 | * function return value is 0. | |
250 | */ | |
251 | static int do_drive_get_GTF(ide_drive_t *drive, | |
252 | unsigned int *gtf_length, unsigned long *gtf_address, | |
253 | unsigned long *obj_loc) | |
254 | { | |
255 | acpi_status status; | |
256 | struct acpi_buffer output; | |
257 | union acpi_object *out_obj; | |
258 | ide_hwif_t *hwif = HWIF(drive); | |
259 | struct device *dev = hwif->gendev.parent; | |
260 | int err = -ENODEV; | |
261 | int port; | |
262 | ||
263 | *gtf_length = 0; | |
264 | *gtf_address = 0UL; | |
265 | *obj_loc = 0UL; | |
266 | ||
267 | if (ide_noacpi) | |
268 | return 0; | |
269 | ||
270 | if (!dev) { | |
271 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
272 | goto out; | |
273 | } | |
274 | ||
275 | if (!hwif->acpidata) { | |
276 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
277 | goto out; | |
278 | } | |
279 | ||
280 | port = hwif->channel ? drive->dn - 2: drive->dn; | |
281 | ||
e3a59b4d HR |
282 | DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n", |
283 | hwif->name, dev->bus_id, port, hwif->channel); | |
284 | ||
285 | if (!drive->present) { | |
286 | DEBPRINT("%s drive %d:%d not present\n", | |
287 | hwif->name, hwif->channel, port); | |
288 | goto out; | |
289 | } | |
290 | ||
291 | /* Get this drive's _ADR info. if not already known. */ | |
292 | if (!drive->acpidata->obj_handle) { | |
293 | drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); | |
294 | if (!drive->acpidata->obj_handle) { | |
295 | DEBPRINT("No ACPI object found for %s\n", | |
296 | drive->name); | |
297 | goto out; | |
298 | } | |
299 | } | |
300 | ||
301 | /* Setting up output buffer */ | |
302 | output.length = ACPI_ALLOCATE_BUFFER; | |
303 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
304 | ||
305 | /* _GTF has no input parameters */ | |
306 | err = -EIO; | |
307 | status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF", | |
308 | NULL, &output); | |
309 | if (ACPI_FAILURE(status)) { | |
310 | printk(KERN_DEBUG | |
311 | "%s: Run _GTF error: status = 0x%x\n", | |
312 | __FUNCTION__, status); | |
313 | goto out; | |
314 | } | |
315 | ||
316 | if (!output.length || !output.pointer) { | |
317 | DEBPRINT("Run _GTF: " | |
318 | "length or ptr is NULL (0x%llx, 0x%p)\n", | |
319 | (unsigned long long)output.length, | |
320 | output.pointer); | |
321 | goto out; | |
322 | } | |
323 | ||
324 | out_obj = output.pointer; | |
325 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
326 | DEBPRINT("Run _GTF: error: " | |
327 | "expected object type of ACPI_TYPE_BUFFER, " | |
328 | "got 0x%x\n", out_obj->type); | |
329 | err = -ENOENT; | |
330 | kfree(output.pointer); | |
331 | goto out; | |
332 | } | |
333 | ||
334 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
335 | out_obj->buffer.length % REGS_PER_GTF) { | |
336 | printk(KERN_ERR | |
337 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", | |
338 | __FUNCTION__, out_obj->buffer.length, | |
339 | out_obj->buffer.pointer); | |
340 | err = -ENOENT; | |
341 | kfree(output.pointer); | |
342 | goto out; | |
343 | } | |
344 | ||
345 | *gtf_length = out_obj->buffer.length; | |
346 | *gtf_address = (unsigned long)out_obj->buffer.pointer; | |
347 | *obj_loc = (unsigned long)out_obj; | |
348 | DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", | |
349 | *gtf_length, *gtf_address, *obj_loc); | |
350 | err = 0; | |
351 | out: | |
352 | return err; | |
353 | } | |
354 | ||
355 | /** | |
356 | * taskfile_load_raw - send taskfile registers to drive | |
357 | * @drive: drive to which output is sent | |
358 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) | |
359 | * | |
360 | * Outputs IDE taskfile to the drive. | |
361 | */ | |
362 | static int taskfile_load_raw(ide_drive_t *drive, | |
363 | const struct taskfile_array *gtf) | |
364 | { | |
365 | ide_task_t args; | |
366 | int err = 0; | |
367 | ||
368 | DEBPRINT("(0x1f1-1f7): hex: " | |
369 | "%02x %02x %02x %02x %02x %02x %02x\n", | |
370 | gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], | |
371 | gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); | |
372 | ||
373 | memset(&args, 0, sizeof(ide_task_t)); | |
e3a59b4d HR |
374 | |
375 | /* convert gtf to IDE Taskfile */ | |
650d841d | 376 | memcpy(&args.tf_array[7], >f->tfa, 7); |
657cc1a8 | 377 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
e3a59b4d HR |
378 | |
379 | if (ide_noacpitfs) { | |
380 | DEBPRINT("_GTF execution disabled\n"); | |
381 | return err; | |
382 | } | |
383 | ||
9a3c49be | 384 | err = ide_no_data_taskfile(drive, &args); |
e3a59b4d | 385 | if (err) |
9a3c49be | 386 | printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", |
e3a59b4d HR |
387 | __FUNCTION__, err); |
388 | ||
389 | return err; | |
390 | } | |
391 | ||
392 | /** | |
393 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF | |
394 | * @drive: the drive to which the taskfile command should be sent | |
395 | * @gtf_length: total number of bytes of _GTF taskfiles | |
396 | * @gtf_address: location of _GTF taskfile arrays | |
397 | * | |
398 | * Write {gtf_address, length gtf_length} in groups of | |
399 | * REGS_PER_GTF bytes. | |
400 | */ | |
401 | static int do_drive_set_taskfiles(ide_drive_t *drive, | |
402 | unsigned int gtf_length, | |
403 | unsigned long gtf_address) | |
404 | { | |
405 | int rc = -ENODEV, err; | |
406 | int gtf_count = gtf_length / REGS_PER_GTF; | |
407 | int ix; | |
408 | struct taskfile_array *gtf; | |
409 | ||
410 | if (ide_noacpi) | |
411 | return 0; | |
412 | ||
413 | DEBPRINT("ENTER: %s, hard_port#: %d\n", drive->name, drive->dn); | |
414 | ||
415 | if (!drive->present) | |
416 | goto out; | |
417 | if (!gtf_count) /* shouldn't be here */ | |
418 | goto out; | |
419 | ||
420 | DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", | |
421 | gtf_length, gtf_length, gtf_count, gtf_address); | |
422 | ||
423 | if (gtf_length % REGS_PER_GTF) { | |
424 | printk(KERN_ERR "%s: unexpected GTF length (%d)\n", | |
425 | __FUNCTION__, gtf_length); | |
426 | goto out; | |
427 | } | |
428 | ||
429 | rc = 0; | |
430 | for (ix = 0; ix < gtf_count; ix++) { | |
431 | gtf = (struct taskfile_array *) | |
432 | (gtf_address + ix * REGS_PER_GTF); | |
433 | ||
434 | /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ | |
435 | err = taskfile_load_raw(drive, gtf); | |
436 | if (err) | |
437 | rc = err; | |
438 | } | |
439 | ||
440 | out: | |
441 | return rc; | |
442 | } | |
443 | ||
444 | /** | |
445 | * ide_acpi_exec_tfs - get then write drive taskfile settings | |
446 | * @drive: the drive for which the taskfile settings should be | |
447 | * written. | |
448 | * | |
449 | * According to the ACPI spec this should be called after _STM | |
450 | * has been evaluated for the interface. Some ACPI vendors interpret | |
451 | * that as a hard requirement and modify the taskfile according | |
452 | * to the Identify Drive information passed down with _STM. | |
453 | * So one should really make sure to call this only after _STM has | |
454 | * been executed. | |
455 | */ | |
456 | int ide_acpi_exec_tfs(ide_drive_t *drive) | |
457 | { | |
458 | int ret; | |
459 | unsigned int gtf_length; | |
460 | unsigned long gtf_address; | |
461 | unsigned long obj_loc; | |
462 | ||
463 | if (ide_noacpi) | |
464 | return 0; | |
465 | ||
466 | DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); | |
467 | ||
468 | ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); | |
469 | if (ret < 0) { | |
470 | DEBPRINT("get_GTF error (%d)\n", ret); | |
471 | return ret; | |
472 | } | |
473 | ||
474 | DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); | |
475 | ||
476 | ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); | |
477 | kfree((void *)obj_loc); | |
478 | if (ret < 0) { | |
479 | DEBPRINT("set_taskfiles error (%d)\n", ret); | |
480 | } | |
481 | ||
482 | DEBPRINT("ret=%d\n", ret); | |
483 | ||
484 | return ret; | |
485 | } | |
e3a59b4d HR |
486 | |
487 | /** | |
488 | * ide_acpi_get_timing - get the channel (controller) timings | |
489 | * @hwif: target IDE interface (channel) | |
490 | * | |
491 | * This function executes the _GTM ACPI method for the target channel. | |
492 | * | |
493 | */ | |
494 | void ide_acpi_get_timing(ide_hwif_t *hwif) | |
495 | { | |
496 | acpi_status status; | |
497 | struct acpi_buffer output; | |
498 | union acpi_object *out_obj; | |
499 | ||
500 | if (ide_noacpi) | |
501 | return; | |
502 | ||
503 | DEBPRINT("ENTER:\n"); | |
504 | ||
505 | if (!hwif->acpidata) { | |
506 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
507 | return; | |
508 | } | |
509 | ||
510 | /* Setting up output buffer for _GTM */ | |
511 | output.length = ACPI_ALLOCATE_BUFFER; | |
512 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
513 | ||
514 | /* _GTM has no input parameters */ | |
515 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", | |
516 | NULL, &output); | |
517 | ||
518 | DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", | |
519 | status, output.pointer, | |
520 | (unsigned long long)output.length); | |
521 | ||
522 | if (ACPI_FAILURE(status)) { | |
523 | DEBPRINT("Run _GTM error: status = 0x%x\n", status); | |
524 | return; | |
525 | } | |
526 | ||
527 | if (!output.length || !output.pointer) { | |
528 | DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", | |
529 | (unsigned long long)output.length, | |
530 | output.pointer); | |
531 | kfree(output.pointer); | |
532 | return; | |
533 | } | |
534 | ||
535 | out_obj = output.pointer; | |
536 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
537 | kfree(output.pointer); | |
538 | DEBPRINT("Run _GTM: error: " | |
539 | "expected object type of ACPI_TYPE_BUFFER, " | |
540 | "got 0x%x\n", out_obj->type); | |
541 | return; | |
542 | } | |
543 | ||
544 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
545 | out_obj->buffer.length != sizeof(struct GTM_buffer)) { | |
546 | kfree(output.pointer); | |
547 | printk(KERN_ERR | |
1e8f34f7 AM |
548 | "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " |
549 | "addr (0x%p)\n", | |
550 | __FUNCTION__, out_obj->buffer.length, | |
551 | sizeof(struct GTM_buffer), out_obj->buffer.pointer); | |
e3a59b4d HR |
552 | return; |
553 | } | |
554 | ||
555 | memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, | |
556 | sizeof(struct GTM_buffer)); | |
557 | ||
558 | DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n", | |
559 | out_obj->buffer.pointer, out_obj->buffer.length, | |
560 | sizeof(struct GTM_buffer)); | |
561 | ||
562 | DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", | |
563 | hwif->acpidata->gtm.PIO_speed0, | |
564 | hwif->acpidata->gtm.DMA_speed0, | |
565 | hwif->acpidata->gtm.PIO_speed1, | |
566 | hwif->acpidata->gtm.DMA_speed1, | |
567 | hwif->acpidata->gtm.GTM_flags); | |
568 | ||
569 | kfree(output.pointer); | |
570 | } | |
e3a59b4d HR |
571 | |
572 | /** | |
573 | * ide_acpi_push_timing - set the channel (controller) timings | |
574 | * @hwif: target IDE interface (channel) | |
575 | * | |
576 | * This function executes the _STM ACPI method for the target channel. | |
577 | * | |
578 | * _STM requires Identify Drive data, which has to passed as an argument. | |
579 | * Unfortunately hd_driveid is a mangled version which we can't readily | |
580 | * use; hence we'll get the information afresh. | |
581 | */ | |
582 | void ide_acpi_push_timing(ide_hwif_t *hwif) | |
583 | { | |
584 | acpi_status status; | |
585 | struct acpi_object_list input; | |
586 | union acpi_object in_params[3]; | |
587 | struct ide_acpi_drive_link *master = &hwif->acpidata->master; | |
588 | struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; | |
589 | ||
590 | if (ide_noacpi) | |
591 | return; | |
592 | ||
593 | DEBPRINT("ENTER:\n"); | |
594 | ||
595 | if (!hwif->acpidata) { | |
596 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
597 | return; | |
598 | } | |
599 | ||
600 | /* Give the GTM buffer + drive Identify data to the channel via the | |
601 | * _STM method: */ | |
602 | /* setup input parameters buffer for _STM */ | |
603 | input.count = 3; | |
604 | input.pointer = in_params; | |
605 | in_params[0].type = ACPI_TYPE_BUFFER; | |
606 | in_params[0].buffer.length = sizeof(struct GTM_buffer); | |
607 | in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; | |
608 | in_params[1].type = ACPI_TYPE_BUFFER; | |
609 | in_params[1].buffer.length = sizeof(struct hd_driveid); | |
610 | in_params[1].buffer.pointer = (u8 *)&master->idbuff; | |
611 | in_params[2].type = ACPI_TYPE_BUFFER; | |
612 | in_params[2].buffer.length = sizeof(struct hd_driveid); | |
613 | in_params[2].buffer.pointer = (u8 *)&slave->idbuff; | |
614 | /* Output buffer: _STM has no output */ | |
615 | ||
616 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", | |
617 | &input, NULL); | |
618 | ||
619 | if (ACPI_FAILURE(status)) { | |
620 | DEBPRINT("Run _STM error: status = 0x%x\n", status); | |
621 | } | |
622 | DEBPRINT("_STM status: %d\n", status); | |
623 | } | |
e3a59b4d | 624 | |
5e32132b SL |
625 | /** |
626 | * ide_acpi_set_state - set the channel power state | |
627 | * @hwif: target IDE interface | |
628 | * @on: state, on/off | |
629 | * | |
630 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
631 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
632 | */ | |
633 | void ide_acpi_set_state(ide_hwif_t *hwif, int on) | |
634 | { | |
635 | int unit; | |
636 | ||
90494893 | 637 | if (ide_noacpi || ide_noacpi_psx) |
5e32132b SL |
638 | return; |
639 | ||
640 | DEBPRINT("ENTER:\n"); | |
641 | ||
642 | if (!hwif->acpidata) { | |
643 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
644 | return; | |
645 | } | |
646 | /* channel first and then drives for power on and verse versa for power off */ | |
647 | if (on) | |
648 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); | |
649 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
650 | ide_drive_t *drive = &hwif->drives[unit]; | |
651 | ||
652 | if (!drive->acpidata->obj_handle) | |
653 | drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); | |
654 | ||
655 | if (drive->acpidata->obj_handle && drive->present) { | |
656 | acpi_bus_set_power(drive->acpidata->obj_handle, | |
657 | on? ACPI_STATE_D0: ACPI_STATE_D3); | |
658 | } | |
659 | } | |
660 | if (!on) | |
661 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); | |
662 | } | |
5e32132b | 663 | |
e3a59b4d HR |
664 | /** |
665 | * ide_acpi_init - initialize the ACPI link for an IDE interface | |
666 | * @hwif: target IDE interface (channel) | |
667 | * | |
668 | * The ACPI spec is not quite clear when the drive identify buffer | |
669 | * should be obtained. Calling IDENTIFY DEVICE during shutdown | |
670 | * is not the best of ideas as the drive might already being put to | |
671 | * sleep. And obviously we can't call it during resume. | |
672 | * So we get the information during startup; but this means that | |
673 | * any changes during run-time will be lost after resume. | |
674 | */ | |
675 | void ide_acpi_init(ide_hwif_t *hwif) | |
676 | { | |
90494893 SL |
677 | ide_acpi_blacklist(); |
678 | ||
e3a59b4d HR |
679 | hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); |
680 | if (!hwif->acpidata) | |
681 | return; | |
682 | ||
683 | hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); | |
684 | if (!hwif->acpidata->obj_handle) { | |
685 | DEBPRINT("no ACPI object for %s found\n", hwif->name); | |
686 | kfree(hwif->acpidata); | |
687 | hwif->acpidata = NULL; | |
e3a59b4d | 688 | } |
eafd88a3 BZ |
689 | } |
690 | ||
691 | void ide_acpi_port_init_devices(ide_hwif_t *hwif) | |
692 | { | |
693 | ide_drive_t *drive; | |
694 | int i, err; | |
695 | ||
696 | if (hwif->acpidata == NULL) | |
697 | return; | |
e3a59b4d HR |
698 | |
699 | /* | |
700 | * The ACPI spec mandates that we send information | |
701 | * for both drives, regardless whether they are connected | |
702 | * or not. | |
703 | */ | |
e3a59b4d | 704 | hwif->drives[0].acpidata = &hwif->acpidata->master; |
e3a59b4d | 705 | hwif->drives[1].acpidata = &hwif->acpidata->slave; |
e3a59b4d HR |
706 | |
707 | /* | |
708 | * Send IDENTIFY for each drive | |
709 | */ | |
eafd88a3 BZ |
710 | for (i = 0; i < MAX_DRIVES; i++) { |
711 | drive = &hwif->drives[i]; | |
712 | ||
713 | if (!drive->present) | |
714 | continue; | |
e3a59b4d | 715 | |
eafd88a3 BZ |
716 | err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff); |
717 | if (err) | |
e3a59b4d | 718 | DEBPRINT("identify device %s failed (%d)\n", |
eafd88a3 | 719 | drive->name, err); |
e3a59b4d HR |
720 | } |
721 | ||
722 | if (ide_noacpionboot) { | |
723 | DEBPRINT("ACPI methods disabled on boot\n"); | |
724 | return; | |
725 | } | |
726 | ||
5e32132b SL |
727 | /* ACPI _PS0 before _STM */ |
728 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d HR |
729 | /* |
730 | * ACPI requires us to call _STM on startup | |
731 | */ | |
732 | ide_acpi_get_timing(hwif); | |
733 | ide_acpi_push_timing(hwif); | |
734 | ||
eafd88a3 BZ |
735 | for (i = 0; i < MAX_DRIVES; i++) { |
736 | drive = &hwif->drives[i]; | |
e3a59b4d | 737 | |
eafd88a3 | 738 | if (drive->present) |
e3a59b4d HR |
739 | /* Execute ACPI startup code */ |
740 | ide_acpi_exec_tfs(drive); | |
e3a59b4d HR |
741 | } |
742 | } |