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 { | |
42 | ide_drive_t *drive; | |
43 | acpi_handle obj_handle; | |
44 | u8 idbuff[512]; | |
45 | }; | |
46 | ||
47 | struct ide_acpi_hwif_link { | |
48 | ide_hwif_t *hwif; | |
49 | acpi_handle obj_handle; | |
50 | struct GTM_buffer gtm; | |
51 | struct ide_acpi_drive_link master; | |
52 | struct ide_acpi_drive_link slave; | |
53 | }; | |
54 | ||
55 | #undef DEBUGGING | |
56 | /* note: adds function name and KERN_DEBUG */ | |
57 | #ifdef DEBUGGING | |
58 | #define DEBPRINT(fmt, args...) \ | |
59 | printk(KERN_DEBUG "%s: " fmt, __FUNCTION__, ## args) | |
60 | #else | |
61 | #define DEBPRINT(fmt, args...) do {} while (0) | |
62 | #endif /* DEBUGGING */ | |
63 | ||
64 | extern int ide_noacpi; | |
65 | extern int ide_noacpitfs; | |
66 | extern int ide_noacpionboot; | |
67 | ||
90494893 SL |
68 | static bool ide_noacpi_psx; |
69 | static int no_acpi_psx(const struct dmi_system_id *id) | |
70 | { | |
71 | ide_noacpi_psx = true; | |
72 | printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static const struct dmi_system_id ide_acpi_dmi_table[] = { | |
77 | /* Bug 9673. */ | |
78 | /* We should check if this is because ACPI NVS isn't save/restored. */ | |
79 | { | |
80 | .callback = no_acpi_psx, | |
81 | .ident = "HP nx9005", | |
82 | .matches = { | |
83 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."), | |
84 | DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60") | |
85 | }, | |
86 | }, | |
7c48c56e JG |
87 | |
88 | { } /* terminate list */ | |
90494893 SL |
89 | }; |
90 | ||
91 | static int ide_acpi_blacklist(void) | |
92 | { | |
93 | static int done; | |
94 | if (done) | |
95 | return 0; | |
96 | done = 1; | |
97 | dmi_check_system(ide_acpi_dmi_table); | |
98 | return 0; | |
99 | } | |
100 | ||
e3a59b4d HR |
101 | /** |
102 | * ide_get_dev_handle - finds acpi_handle and PCI device.function | |
103 | * @dev: device to locate | |
104 | * @handle: returned acpi_handle for @dev | |
105 | * @pcidevfn: return PCI device.func for @dev | |
106 | * | |
107 | * Returns the ACPI object handle to the corresponding PCI device. | |
108 | * | |
109 | * Returns 0 on success, <0 on error. | |
110 | */ | |
111 | static int ide_get_dev_handle(struct device *dev, acpi_handle *handle, | |
112 | acpi_integer *pcidevfn) | |
113 | { | |
114 | struct pci_dev *pdev = to_pci_dev(dev); | |
115 | unsigned int bus, devnum, func; | |
116 | acpi_integer addr; | |
117 | acpi_handle dev_handle; | |
118 | struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER, | |
119 | .pointer = NULL}; | |
120 | acpi_status status; | |
121 | struct acpi_device_info *dinfo = NULL; | |
122 | int ret = -ENODEV; | |
123 | ||
124 | bus = pdev->bus->number; | |
125 | devnum = PCI_SLOT(pdev->devfn); | |
126 | func = PCI_FUNC(pdev->devfn); | |
127 | /* ACPI _ADR encoding for PCI bus: */ | |
128 | addr = (acpi_integer)(devnum << 16 | func); | |
129 | ||
130 | DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func); | |
131 | ||
132 | dev_handle = DEVICE_ACPI_HANDLE(dev); | |
133 | if (!dev_handle) { | |
134 | DEBPRINT("no acpi handle for device\n"); | |
135 | goto err; | |
136 | } | |
137 | ||
138 | status = acpi_get_object_info(dev_handle, &buffer); | |
139 | if (ACPI_FAILURE(status)) { | |
140 | DEBPRINT("get_object_info for device failed\n"); | |
141 | goto err; | |
142 | } | |
143 | dinfo = buffer.pointer; | |
144 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && | |
145 | dinfo->address == addr) { | |
146 | *pcidevfn = addr; | |
147 | *handle = dev_handle; | |
148 | } else { | |
149 | DEBPRINT("get_object_info for device has wrong " | |
150 | " address: %llu, should be %u\n", | |
151 | dinfo ? (unsigned long long)dinfo->address : -1ULL, | |
152 | (unsigned int)addr); | |
153 | goto err; | |
154 | } | |
155 | ||
156 | DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n", | |
157 | devnum, func, (unsigned long long)addr, *handle); | |
158 | ret = 0; | |
159 | err: | |
160 | kfree(dinfo); | |
161 | return ret; | |
162 | } | |
163 | ||
164 | /** | |
165 | * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif | |
166 | * @hwif: device to locate | |
167 | * | |
168 | * Retrieves the object handle for a given hwif. | |
169 | * | |
170 | * Returns handle on success, 0 on error. | |
171 | */ | |
172 | static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) | |
173 | { | |
174 | struct device *dev = hwif->gendev.parent; | |
175 | acpi_handle dev_handle; | |
176 | acpi_integer pcidevfn; | |
177 | acpi_handle chan_handle; | |
178 | int err; | |
179 | ||
180 | DEBPRINT("ENTER: device %s\n", hwif->name); | |
181 | ||
182 | if (!dev) { | |
183 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn); | |
188 | if (err < 0) { | |
189 | DEBPRINT("ide_get_dev_handle failed (%d)\n", err); | |
190 | return NULL; | |
191 | } | |
192 | ||
193 | /* get child objects of dev_handle == channel objects, | |
194 | * + _their_ children == drive objects */ | |
195 | /* channel is hwif->channel */ | |
196 | chan_handle = acpi_get_child(dev_handle, hwif->channel); | |
197 | DEBPRINT("chan adr=%d: handle=0x%p\n", | |
198 | hwif->channel, chan_handle); | |
199 | ||
200 | return chan_handle; | |
201 | } | |
202 | ||
203 | /** | |
204 | * ide_acpi_drive_get_handle - Get ACPI object handle for a given drive | |
205 | * @drive: device to locate | |
206 | * | |
207 | * Retrieves the object handle of a given drive. According to the ACPI | |
208 | * spec the drive is a child of the hwif. | |
209 | * | |
210 | * Returns handle on success, 0 on error. | |
211 | */ | |
212 | static acpi_handle ide_acpi_drive_get_handle(ide_drive_t *drive) | |
213 | { | |
214 | ide_hwif_t *hwif = HWIF(drive); | |
215 | int port; | |
216 | acpi_handle drive_handle; | |
217 | ||
218 | if (!hwif->acpidata) | |
219 | return NULL; | |
220 | ||
221 | if (!hwif->acpidata->obj_handle) | |
222 | return NULL; | |
223 | ||
224 | port = hwif->channel ? drive->dn - 2: drive->dn; | |
225 | ||
226 | DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", | |
227 | drive->name, hwif->channel, port); | |
228 | ||
229 | ||
230 | /* TBD: could also check ACPI object VALID bits */ | |
231 | drive_handle = acpi_get_child(hwif->acpidata->obj_handle, port); | |
232 | DEBPRINT("drive %s handle 0x%p\n", drive->name, drive_handle); | |
233 | ||
234 | return drive_handle; | |
235 | } | |
236 | ||
237 | /** | |
238 | * do_drive_get_GTF - get the drive bootup default taskfile settings | |
239 | * @drive: the drive for which the taskfile settings should be retrieved | |
240 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address | |
241 | * @gtf_address: buffer containing _GTF taskfile arrays | |
242 | * | |
243 | * The _GTF method has no input parameters. | |
244 | * It returns a variable number of register set values (registers | |
245 | * hex 1F1..1F7, taskfiles). | |
246 | * The <variable number> is not known in advance, so have ACPI-CA | |
247 | * allocate the buffer as needed and return it, then free it later. | |
248 | * | |
249 | * The returned @gtf_length and @gtf_address are only valid if the | |
250 | * function return value is 0. | |
251 | */ | |
252 | static int do_drive_get_GTF(ide_drive_t *drive, | |
253 | unsigned int *gtf_length, unsigned long *gtf_address, | |
254 | unsigned long *obj_loc) | |
255 | { | |
256 | acpi_status status; | |
257 | struct acpi_buffer output; | |
258 | union acpi_object *out_obj; | |
259 | ide_hwif_t *hwif = HWIF(drive); | |
260 | struct device *dev = hwif->gendev.parent; | |
261 | int err = -ENODEV; | |
262 | int port; | |
263 | ||
264 | *gtf_length = 0; | |
265 | *gtf_address = 0UL; | |
266 | *obj_loc = 0UL; | |
267 | ||
268 | if (ide_noacpi) | |
269 | return 0; | |
270 | ||
271 | if (!dev) { | |
272 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
273 | goto out; | |
274 | } | |
275 | ||
276 | if (!hwif->acpidata) { | |
277 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
278 | goto out; | |
279 | } | |
280 | ||
281 | port = hwif->channel ? drive->dn - 2: drive->dn; | |
282 | ||
e3a59b4d HR |
283 | DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n", |
284 | hwif->name, dev->bus_id, port, hwif->channel); | |
285 | ||
286 | if (!drive->present) { | |
287 | DEBPRINT("%s drive %d:%d not present\n", | |
288 | hwif->name, hwif->channel, port); | |
289 | goto out; | |
290 | } | |
291 | ||
292 | /* Get this drive's _ADR info. if not already known. */ | |
293 | if (!drive->acpidata->obj_handle) { | |
294 | drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); | |
295 | if (!drive->acpidata->obj_handle) { | |
296 | DEBPRINT("No ACPI object found for %s\n", | |
297 | drive->name); | |
298 | goto out; | |
299 | } | |
300 | } | |
301 | ||
302 | /* Setting up output buffer */ | |
303 | output.length = ACPI_ALLOCATE_BUFFER; | |
304 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
305 | ||
306 | /* _GTF has no input parameters */ | |
307 | err = -EIO; | |
308 | status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF", | |
309 | NULL, &output); | |
310 | if (ACPI_FAILURE(status)) { | |
311 | printk(KERN_DEBUG | |
312 | "%s: Run _GTF error: status = 0x%x\n", | |
313 | __FUNCTION__, status); | |
314 | goto out; | |
315 | } | |
316 | ||
317 | if (!output.length || !output.pointer) { | |
318 | DEBPRINT("Run _GTF: " | |
319 | "length or ptr is NULL (0x%llx, 0x%p)\n", | |
320 | (unsigned long long)output.length, | |
321 | output.pointer); | |
322 | goto out; | |
323 | } | |
324 | ||
325 | out_obj = output.pointer; | |
326 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
327 | DEBPRINT("Run _GTF: error: " | |
328 | "expected object type of ACPI_TYPE_BUFFER, " | |
329 | "got 0x%x\n", out_obj->type); | |
330 | err = -ENOENT; | |
331 | kfree(output.pointer); | |
332 | goto out; | |
333 | } | |
334 | ||
335 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
336 | out_obj->buffer.length % REGS_PER_GTF) { | |
337 | printk(KERN_ERR | |
338 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", | |
339 | __FUNCTION__, out_obj->buffer.length, | |
340 | out_obj->buffer.pointer); | |
341 | err = -ENOENT; | |
342 | kfree(output.pointer); | |
343 | goto out; | |
344 | } | |
345 | ||
346 | *gtf_length = out_obj->buffer.length; | |
347 | *gtf_address = (unsigned long)out_obj->buffer.pointer; | |
348 | *obj_loc = (unsigned long)out_obj; | |
349 | DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", | |
350 | *gtf_length, *gtf_address, *obj_loc); | |
351 | err = 0; | |
352 | out: | |
353 | return err; | |
354 | } | |
355 | ||
356 | /** | |
357 | * taskfile_load_raw - send taskfile registers to drive | |
358 | * @drive: drive to which output is sent | |
359 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) | |
360 | * | |
361 | * Outputs IDE taskfile to the drive. | |
362 | */ | |
363 | static int taskfile_load_raw(ide_drive_t *drive, | |
364 | const struct taskfile_array *gtf) | |
365 | { | |
366 | ide_task_t args; | |
367 | int err = 0; | |
368 | ||
369 | DEBPRINT("(0x1f1-1f7): hex: " | |
370 | "%02x %02x %02x %02x %02x %02x %02x\n", | |
371 | gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], | |
372 | gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); | |
373 | ||
374 | memset(&args, 0, sizeof(ide_task_t)); | |
e3a59b4d HR |
375 | |
376 | /* convert gtf to IDE Taskfile */ | |
650d841d | 377 | memcpy(&args.tf_array[7], >f->tfa, 7); |
657cc1a8 | 378 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
e3a59b4d HR |
379 | |
380 | if (ide_noacpitfs) { | |
381 | DEBPRINT("_GTF execution disabled\n"); | |
382 | return err; | |
383 | } | |
384 | ||
9a3c49be | 385 | err = ide_no_data_taskfile(drive, &args); |
e3a59b4d | 386 | if (err) |
9a3c49be | 387 | printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", |
e3a59b4d HR |
388 | __FUNCTION__, err); |
389 | ||
390 | return err; | |
391 | } | |
392 | ||
393 | /** | |
394 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF | |
395 | * @drive: the drive to which the taskfile command should be sent | |
396 | * @gtf_length: total number of bytes of _GTF taskfiles | |
397 | * @gtf_address: location of _GTF taskfile arrays | |
398 | * | |
399 | * Write {gtf_address, length gtf_length} in groups of | |
400 | * REGS_PER_GTF bytes. | |
401 | */ | |
402 | static int do_drive_set_taskfiles(ide_drive_t *drive, | |
403 | unsigned int gtf_length, | |
404 | unsigned long gtf_address) | |
405 | { | |
406 | int rc = -ENODEV, err; | |
407 | int gtf_count = gtf_length / REGS_PER_GTF; | |
408 | int ix; | |
409 | struct taskfile_array *gtf; | |
410 | ||
411 | if (ide_noacpi) | |
412 | return 0; | |
413 | ||
414 | DEBPRINT("ENTER: %s, hard_port#: %d\n", drive->name, drive->dn); | |
415 | ||
416 | if (!drive->present) | |
417 | goto out; | |
418 | if (!gtf_count) /* shouldn't be here */ | |
419 | goto out; | |
420 | ||
421 | DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", | |
422 | gtf_length, gtf_length, gtf_count, gtf_address); | |
423 | ||
424 | if (gtf_length % REGS_PER_GTF) { | |
425 | printk(KERN_ERR "%s: unexpected GTF length (%d)\n", | |
426 | __FUNCTION__, gtf_length); | |
427 | goto out; | |
428 | } | |
429 | ||
430 | rc = 0; | |
431 | for (ix = 0; ix < gtf_count; ix++) { | |
432 | gtf = (struct taskfile_array *) | |
433 | (gtf_address + ix * REGS_PER_GTF); | |
434 | ||
435 | /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ | |
436 | err = taskfile_load_raw(drive, gtf); | |
437 | if (err) | |
438 | rc = err; | |
439 | } | |
440 | ||
441 | out: | |
442 | return rc; | |
443 | } | |
444 | ||
445 | /** | |
446 | * ide_acpi_exec_tfs - get then write drive taskfile settings | |
447 | * @drive: the drive for which the taskfile settings should be | |
448 | * written. | |
449 | * | |
450 | * According to the ACPI spec this should be called after _STM | |
451 | * has been evaluated for the interface. Some ACPI vendors interpret | |
452 | * that as a hard requirement and modify the taskfile according | |
453 | * to the Identify Drive information passed down with _STM. | |
454 | * So one should really make sure to call this only after _STM has | |
455 | * been executed. | |
456 | */ | |
457 | int ide_acpi_exec_tfs(ide_drive_t *drive) | |
458 | { | |
459 | int ret; | |
460 | unsigned int gtf_length; | |
461 | unsigned long gtf_address; | |
462 | unsigned long obj_loc; | |
463 | ||
464 | if (ide_noacpi) | |
465 | return 0; | |
466 | ||
467 | DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); | |
468 | ||
469 | ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); | |
470 | if (ret < 0) { | |
471 | DEBPRINT("get_GTF error (%d)\n", ret); | |
472 | return ret; | |
473 | } | |
474 | ||
475 | DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); | |
476 | ||
477 | ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); | |
478 | kfree((void *)obj_loc); | |
479 | if (ret < 0) { | |
480 | DEBPRINT("set_taskfiles error (%d)\n", ret); | |
481 | } | |
482 | ||
483 | DEBPRINT("ret=%d\n", ret); | |
484 | ||
485 | return ret; | |
486 | } | |
e3a59b4d HR |
487 | |
488 | /** | |
489 | * ide_acpi_get_timing - get the channel (controller) timings | |
490 | * @hwif: target IDE interface (channel) | |
491 | * | |
492 | * This function executes the _GTM ACPI method for the target channel. | |
493 | * | |
494 | */ | |
495 | void ide_acpi_get_timing(ide_hwif_t *hwif) | |
496 | { | |
497 | acpi_status status; | |
498 | struct acpi_buffer output; | |
499 | union acpi_object *out_obj; | |
500 | ||
501 | if (ide_noacpi) | |
502 | return; | |
503 | ||
504 | DEBPRINT("ENTER:\n"); | |
505 | ||
506 | if (!hwif->acpidata) { | |
507 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
508 | return; | |
509 | } | |
510 | ||
511 | /* Setting up output buffer for _GTM */ | |
512 | output.length = ACPI_ALLOCATE_BUFFER; | |
513 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
514 | ||
515 | /* _GTM has no input parameters */ | |
516 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", | |
517 | NULL, &output); | |
518 | ||
519 | DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", | |
520 | status, output.pointer, | |
521 | (unsigned long long)output.length); | |
522 | ||
523 | if (ACPI_FAILURE(status)) { | |
524 | DEBPRINT("Run _GTM error: status = 0x%x\n", status); | |
525 | return; | |
526 | } | |
527 | ||
528 | if (!output.length || !output.pointer) { | |
529 | DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", | |
530 | (unsigned long long)output.length, | |
531 | output.pointer); | |
532 | kfree(output.pointer); | |
533 | return; | |
534 | } | |
535 | ||
536 | out_obj = output.pointer; | |
537 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
538 | kfree(output.pointer); | |
539 | DEBPRINT("Run _GTM: error: " | |
540 | "expected object type of ACPI_TYPE_BUFFER, " | |
541 | "got 0x%x\n", out_obj->type); | |
542 | return; | |
543 | } | |
544 | ||
545 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
546 | out_obj->buffer.length != sizeof(struct GTM_buffer)) { | |
547 | kfree(output.pointer); | |
548 | printk(KERN_ERR | |
1e8f34f7 AM |
549 | "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " |
550 | "addr (0x%p)\n", | |
551 | __FUNCTION__, out_obj->buffer.length, | |
552 | sizeof(struct GTM_buffer), out_obj->buffer.pointer); | |
e3a59b4d HR |
553 | return; |
554 | } | |
555 | ||
556 | memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, | |
557 | sizeof(struct GTM_buffer)); | |
558 | ||
559 | DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n", | |
560 | out_obj->buffer.pointer, out_obj->buffer.length, | |
561 | sizeof(struct GTM_buffer)); | |
562 | ||
563 | DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", | |
564 | hwif->acpidata->gtm.PIO_speed0, | |
565 | hwif->acpidata->gtm.DMA_speed0, | |
566 | hwif->acpidata->gtm.PIO_speed1, | |
567 | hwif->acpidata->gtm.DMA_speed1, | |
568 | hwif->acpidata->gtm.GTM_flags); | |
569 | ||
570 | kfree(output.pointer); | |
571 | } | |
e3a59b4d HR |
572 | |
573 | /** | |
574 | * ide_acpi_push_timing - set the channel (controller) timings | |
575 | * @hwif: target IDE interface (channel) | |
576 | * | |
577 | * This function executes the _STM ACPI method for the target channel. | |
578 | * | |
579 | * _STM requires Identify Drive data, which has to passed as an argument. | |
580 | * Unfortunately hd_driveid is a mangled version which we can't readily | |
581 | * use; hence we'll get the information afresh. | |
582 | */ | |
583 | void ide_acpi_push_timing(ide_hwif_t *hwif) | |
584 | { | |
585 | acpi_status status; | |
586 | struct acpi_object_list input; | |
587 | union acpi_object in_params[3]; | |
588 | struct ide_acpi_drive_link *master = &hwif->acpidata->master; | |
589 | struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; | |
590 | ||
591 | if (ide_noacpi) | |
592 | return; | |
593 | ||
594 | DEBPRINT("ENTER:\n"); | |
595 | ||
596 | if (!hwif->acpidata) { | |
597 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
598 | return; | |
599 | } | |
600 | ||
601 | /* Give the GTM buffer + drive Identify data to the channel via the | |
602 | * _STM method: */ | |
603 | /* setup input parameters buffer for _STM */ | |
604 | input.count = 3; | |
605 | input.pointer = in_params; | |
606 | in_params[0].type = ACPI_TYPE_BUFFER; | |
607 | in_params[0].buffer.length = sizeof(struct GTM_buffer); | |
608 | in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; | |
609 | in_params[1].type = ACPI_TYPE_BUFFER; | |
610 | in_params[1].buffer.length = sizeof(struct hd_driveid); | |
611 | in_params[1].buffer.pointer = (u8 *)&master->idbuff; | |
612 | in_params[2].type = ACPI_TYPE_BUFFER; | |
613 | in_params[2].buffer.length = sizeof(struct hd_driveid); | |
614 | in_params[2].buffer.pointer = (u8 *)&slave->idbuff; | |
615 | /* Output buffer: _STM has no output */ | |
616 | ||
617 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", | |
618 | &input, NULL); | |
619 | ||
620 | if (ACPI_FAILURE(status)) { | |
621 | DEBPRINT("Run _STM error: status = 0x%x\n", status); | |
622 | } | |
623 | DEBPRINT("_STM status: %d\n", status); | |
624 | } | |
e3a59b4d | 625 | |
5e32132b SL |
626 | /** |
627 | * ide_acpi_set_state - set the channel power state | |
628 | * @hwif: target IDE interface | |
629 | * @on: state, on/off | |
630 | * | |
631 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
632 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
633 | */ | |
634 | void ide_acpi_set_state(ide_hwif_t *hwif, int on) | |
635 | { | |
636 | int unit; | |
637 | ||
90494893 | 638 | if (ide_noacpi || ide_noacpi_psx) |
5e32132b SL |
639 | return; |
640 | ||
641 | DEBPRINT("ENTER:\n"); | |
642 | ||
643 | if (!hwif->acpidata) { | |
644 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
645 | return; | |
646 | } | |
647 | /* channel first and then drives for power on and verse versa for power off */ | |
648 | if (on) | |
649 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); | |
650 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
651 | ide_drive_t *drive = &hwif->drives[unit]; | |
652 | ||
653 | if (!drive->acpidata->obj_handle) | |
654 | drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); | |
655 | ||
656 | if (drive->acpidata->obj_handle && drive->present) { | |
657 | acpi_bus_set_power(drive->acpidata->obj_handle, | |
658 | on? ACPI_STATE_D0: ACPI_STATE_D3); | |
659 | } | |
660 | } | |
661 | if (!on) | |
662 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); | |
663 | } | |
5e32132b | 664 | |
e3a59b4d HR |
665 | /** |
666 | * ide_acpi_init - initialize the ACPI link for an IDE interface | |
667 | * @hwif: target IDE interface (channel) | |
668 | * | |
669 | * The ACPI spec is not quite clear when the drive identify buffer | |
670 | * should be obtained. Calling IDENTIFY DEVICE during shutdown | |
671 | * is not the best of ideas as the drive might already being put to | |
672 | * sleep. And obviously we can't call it during resume. | |
673 | * So we get the information during startup; but this means that | |
674 | * any changes during run-time will be lost after resume. | |
675 | */ | |
676 | void ide_acpi_init(ide_hwif_t *hwif) | |
677 | { | |
678 | int unit; | |
679 | int err; | |
680 | struct ide_acpi_drive_link *master; | |
681 | struct ide_acpi_drive_link *slave; | |
682 | ||
90494893 SL |
683 | ide_acpi_blacklist(); |
684 | ||
e3a59b4d HR |
685 | hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); |
686 | if (!hwif->acpidata) | |
687 | return; | |
688 | ||
689 | hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); | |
690 | if (!hwif->acpidata->obj_handle) { | |
691 | DEBPRINT("no ACPI object for %s found\n", hwif->name); | |
692 | kfree(hwif->acpidata); | |
693 | hwif->acpidata = NULL; | |
694 | return; | |
695 | } | |
696 | ||
697 | /* | |
698 | * The ACPI spec mandates that we send information | |
699 | * for both drives, regardless whether they are connected | |
700 | * or not. | |
701 | */ | |
702 | hwif->acpidata->master.drive = &hwif->drives[0]; | |
703 | hwif->drives[0].acpidata = &hwif->acpidata->master; | |
704 | master = &hwif->acpidata->master; | |
705 | ||
706 | hwif->acpidata->slave.drive = &hwif->drives[1]; | |
707 | hwif->drives[1].acpidata = &hwif->acpidata->slave; | |
708 | slave = &hwif->acpidata->slave; | |
709 | ||
710 | ||
711 | /* | |
712 | * Send IDENTIFY for each drive | |
713 | */ | |
714 | if (master->drive->present) { | |
715 | err = taskfile_lib_get_identify(master->drive, master->idbuff); | |
716 | if (err) { | |
717 | DEBPRINT("identify device %s failed (%d)\n", | |
718 | master->drive->name, err); | |
719 | } | |
720 | } | |
721 | ||
722 | if (slave->drive->present) { | |
723 | err = taskfile_lib_get_identify(slave->drive, slave->idbuff); | |
724 | if (err) { | |
725 | DEBPRINT("identify device %s failed (%d)\n", | |
726 | slave->drive->name, err); | |
727 | } | |
728 | } | |
729 | ||
730 | if (ide_noacpionboot) { | |
731 | DEBPRINT("ACPI methods disabled on boot\n"); | |
732 | return; | |
733 | } | |
734 | ||
5e32132b SL |
735 | /* ACPI _PS0 before _STM */ |
736 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d HR |
737 | /* |
738 | * ACPI requires us to call _STM on startup | |
739 | */ | |
740 | ide_acpi_get_timing(hwif); | |
741 | ide_acpi_push_timing(hwif); | |
742 | ||
743 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
744 | ide_drive_t *drive = &hwif->drives[unit]; | |
745 | ||
746 | if (drive->present) { | |
747 | /* Execute ACPI startup code */ | |
748 | ide_acpi_exec_tfs(drive); | |
749 | } | |
750 | } | |
751 | } |