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e3a59b4d HR |
1 | /* |
2 | * ide-acpi.c | |
3 | * Provides ACPI support for IDE drives. | |
4 | * | |
5 | * Copyright (C) 2005 Intel Corp. | |
6 | * Copyright (C) 2005 Randy Dunlap | |
7 | * Copyright (C) 2006 SUSE Linux Products GmbH | |
8 | * Copyright (C) 2006 Hannes Reinecke | |
9 | */ | |
10 | ||
11 | #include <linux/ata.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <acpi/acpi.h> | |
17 | #include <linux/ide.h> | |
18 | #include <linux/pci.h> | |
90494893 | 19 | #include <linux/dmi.h> |
e3a59b4d HR |
20 | |
21 | #include <acpi/acpi_bus.h> | |
22 | #include <acpi/acnames.h> | |
23 | #include <acpi/acnamesp.h> | |
24 | #include <acpi/acparser.h> | |
25 | #include <acpi/acexcep.h> | |
26 | #include <acpi/acmacros.h> | |
27 | #include <acpi/actypes.h> | |
28 | ||
29 | #define REGS_PER_GTF 7 | |
30 | struct taskfile_array { | |
31 | u8 tfa[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
32 | }; | |
33 | ||
34 | struct GTM_buffer { | |
35 | u32 PIO_speed0; | |
36 | u32 DMA_speed0; | |
37 | u32 PIO_speed1; | |
38 | u32 DMA_speed1; | |
39 | u32 GTM_flags; | |
40 | }; | |
41 | ||
42 | struct ide_acpi_drive_link { | |
43 | ide_drive_t *drive; | |
44 | acpi_handle obj_handle; | |
45 | u8 idbuff[512]; | |
46 | }; | |
47 | ||
48 | struct ide_acpi_hwif_link { | |
49 | ide_hwif_t *hwif; | |
50 | acpi_handle obj_handle; | |
51 | struct GTM_buffer gtm; | |
52 | struct ide_acpi_drive_link master; | |
53 | struct ide_acpi_drive_link slave; | |
54 | }; | |
55 | ||
56 | #undef DEBUGGING | |
57 | /* note: adds function name and KERN_DEBUG */ | |
58 | #ifdef DEBUGGING | |
59 | #define DEBPRINT(fmt, args...) \ | |
60 | printk(KERN_DEBUG "%s: " fmt, __FUNCTION__, ## args) | |
61 | #else | |
62 | #define DEBPRINT(fmt, args...) do {} while (0) | |
63 | #endif /* DEBUGGING */ | |
64 | ||
65 | extern int ide_noacpi; | |
66 | extern int ide_noacpitfs; | |
67 | extern int ide_noacpionboot; | |
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 | }, | |
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; | |
174 | acpi_handle dev_handle; | |
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 | ||
282 | if (!drive->acpidata) { | |
283 | if (port == 0) { | |
284 | drive->acpidata = &hwif->acpidata->master; | |
285 | hwif->acpidata->master.drive = drive; | |
286 | } else { | |
287 | drive->acpidata = &hwif->acpidata->slave; | |
288 | hwif->acpidata->slave.drive = drive; | |
289 | } | |
290 | } | |
291 | ||
292 | DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n", | |
293 | hwif->name, dev->bus_id, port, hwif->channel); | |
294 | ||
295 | if (!drive->present) { | |
296 | DEBPRINT("%s drive %d:%d not present\n", | |
297 | hwif->name, hwif->channel, port); | |
298 | goto out; | |
299 | } | |
300 | ||
301 | /* Get this drive's _ADR info. if not already known. */ | |
302 | if (!drive->acpidata->obj_handle) { | |
303 | drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); | |
304 | if (!drive->acpidata->obj_handle) { | |
305 | DEBPRINT("No ACPI object found for %s\n", | |
306 | drive->name); | |
307 | goto out; | |
308 | } | |
309 | } | |
310 | ||
311 | /* Setting up output buffer */ | |
312 | output.length = ACPI_ALLOCATE_BUFFER; | |
313 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
314 | ||
315 | /* _GTF has no input parameters */ | |
316 | err = -EIO; | |
317 | status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF", | |
318 | NULL, &output); | |
319 | if (ACPI_FAILURE(status)) { | |
320 | printk(KERN_DEBUG | |
321 | "%s: Run _GTF error: status = 0x%x\n", | |
322 | __FUNCTION__, status); | |
323 | goto out; | |
324 | } | |
325 | ||
326 | if (!output.length || !output.pointer) { | |
327 | DEBPRINT("Run _GTF: " | |
328 | "length or ptr is NULL (0x%llx, 0x%p)\n", | |
329 | (unsigned long long)output.length, | |
330 | output.pointer); | |
331 | goto out; | |
332 | } | |
333 | ||
334 | out_obj = output.pointer; | |
335 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
336 | DEBPRINT("Run _GTF: error: " | |
337 | "expected object type of ACPI_TYPE_BUFFER, " | |
338 | "got 0x%x\n", out_obj->type); | |
339 | err = -ENOENT; | |
340 | kfree(output.pointer); | |
341 | goto out; | |
342 | } | |
343 | ||
344 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
345 | out_obj->buffer.length % REGS_PER_GTF) { | |
346 | printk(KERN_ERR | |
347 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", | |
348 | __FUNCTION__, out_obj->buffer.length, | |
349 | out_obj->buffer.pointer); | |
350 | err = -ENOENT; | |
351 | kfree(output.pointer); | |
352 | goto out; | |
353 | } | |
354 | ||
355 | *gtf_length = out_obj->buffer.length; | |
356 | *gtf_address = (unsigned long)out_obj->buffer.pointer; | |
357 | *obj_loc = (unsigned long)out_obj; | |
358 | DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", | |
359 | *gtf_length, *gtf_address, *obj_loc); | |
360 | err = 0; | |
361 | out: | |
362 | return err; | |
363 | } | |
364 | ||
365 | /** | |
366 | * taskfile_load_raw - send taskfile registers to drive | |
367 | * @drive: drive to which output is sent | |
368 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) | |
369 | * | |
370 | * Outputs IDE taskfile to the drive. | |
371 | */ | |
372 | static int taskfile_load_raw(ide_drive_t *drive, | |
373 | const struct taskfile_array *gtf) | |
374 | { | |
375 | ide_task_t args; | |
376 | int err = 0; | |
377 | ||
378 | DEBPRINT("(0x1f1-1f7): hex: " | |
379 | "%02x %02x %02x %02x %02x %02x %02x\n", | |
380 | gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], | |
381 | gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); | |
382 | ||
383 | memset(&args, 0, sizeof(ide_task_t)); | |
384 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
892470b2 | 385 | args.data_phase = TASKFILE_NO_DATA; |
e3a59b4d HR |
386 | args.handler = &task_no_data_intr; |
387 | ||
388 | /* convert gtf to IDE Taskfile */ | |
389 | args.tfRegister[1] = gtf->tfa[0]; /* 0x1f1 */ | |
390 | args.tfRegister[2] = gtf->tfa[1]; /* 0x1f2 */ | |
391 | args.tfRegister[3] = gtf->tfa[2]; /* 0x1f3 */ | |
392 | args.tfRegister[4] = gtf->tfa[3]; /* 0x1f4 */ | |
393 | args.tfRegister[5] = gtf->tfa[4]; /* 0x1f5 */ | |
394 | args.tfRegister[6] = gtf->tfa[5]; /* 0x1f6 */ | |
395 | args.tfRegister[7] = gtf->tfa[6]; /* 0x1f7 */ | |
396 | ||
397 | if (ide_noacpitfs) { | |
398 | DEBPRINT("_GTF execution disabled\n"); | |
399 | return err; | |
400 | } | |
401 | ||
402 | err = ide_raw_taskfile(drive, &args, NULL); | |
403 | if (err) | |
404 | printk(KERN_ERR "%s: ide_raw_taskfile failed: %u\n", | |
405 | __FUNCTION__, err); | |
406 | ||
407 | return err; | |
408 | } | |
409 | ||
410 | /** | |
411 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF | |
412 | * @drive: the drive to which the taskfile command should be sent | |
413 | * @gtf_length: total number of bytes of _GTF taskfiles | |
414 | * @gtf_address: location of _GTF taskfile arrays | |
415 | * | |
416 | * Write {gtf_address, length gtf_length} in groups of | |
417 | * REGS_PER_GTF bytes. | |
418 | */ | |
419 | static int do_drive_set_taskfiles(ide_drive_t *drive, | |
420 | unsigned int gtf_length, | |
421 | unsigned long gtf_address) | |
422 | { | |
423 | int rc = -ENODEV, err; | |
424 | int gtf_count = gtf_length / REGS_PER_GTF; | |
425 | int ix; | |
426 | struct taskfile_array *gtf; | |
427 | ||
428 | if (ide_noacpi) | |
429 | return 0; | |
430 | ||
431 | DEBPRINT("ENTER: %s, hard_port#: %d\n", drive->name, drive->dn); | |
432 | ||
433 | if (!drive->present) | |
434 | goto out; | |
435 | if (!gtf_count) /* shouldn't be here */ | |
436 | goto out; | |
437 | ||
438 | DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", | |
439 | gtf_length, gtf_length, gtf_count, gtf_address); | |
440 | ||
441 | if (gtf_length % REGS_PER_GTF) { | |
442 | printk(KERN_ERR "%s: unexpected GTF length (%d)\n", | |
443 | __FUNCTION__, gtf_length); | |
444 | goto out; | |
445 | } | |
446 | ||
447 | rc = 0; | |
448 | for (ix = 0; ix < gtf_count; ix++) { | |
449 | gtf = (struct taskfile_array *) | |
450 | (gtf_address + ix * REGS_PER_GTF); | |
451 | ||
452 | /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ | |
453 | err = taskfile_load_raw(drive, gtf); | |
454 | if (err) | |
455 | rc = err; | |
456 | } | |
457 | ||
458 | out: | |
459 | return rc; | |
460 | } | |
461 | ||
462 | /** | |
463 | * ide_acpi_exec_tfs - get then write drive taskfile settings | |
464 | * @drive: the drive for which the taskfile settings should be | |
465 | * written. | |
466 | * | |
467 | * According to the ACPI spec this should be called after _STM | |
468 | * has been evaluated for the interface. Some ACPI vendors interpret | |
469 | * that as a hard requirement and modify the taskfile according | |
470 | * to the Identify Drive information passed down with _STM. | |
471 | * So one should really make sure to call this only after _STM has | |
472 | * been executed. | |
473 | */ | |
474 | int ide_acpi_exec_tfs(ide_drive_t *drive) | |
475 | { | |
476 | int ret; | |
477 | unsigned int gtf_length; | |
478 | unsigned long gtf_address; | |
479 | unsigned long obj_loc; | |
480 | ||
481 | if (ide_noacpi) | |
482 | return 0; | |
483 | ||
484 | DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); | |
485 | ||
486 | ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); | |
487 | if (ret < 0) { | |
488 | DEBPRINT("get_GTF error (%d)\n", ret); | |
489 | return ret; | |
490 | } | |
491 | ||
492 | DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); | |
493 | ||
494 | ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); | |
495 | kfree((void *)obj_loc); | |
496 | if (ret < 0) { | |
497 | DEBPRINT("set_taskfiles error (%d)\n", ret); | |
498 | } | |
499 | ||
500 | DEBPRINT("ret=%d\n", ret); | |
501 | ||
502 | return ret; | |
503 | } | |
504 | EXPORT_SYMBOL_GPL(ide_acpi_exec_tfs); | |
505 | ||
506 | /** | |
507 | * ide_acpi_get_timing - get the channel (controller) timings | |
508 | * @hwif: target IDE interface (channel) | |
509 | * | |
510 | * This function executes the _GTM ACPI method for the target channel. | |
511 | * | |
512 | */ | |
513 | void ide_acpi_get_timing(ide_hwif_t *hwif) | |
514 | { | |
515 | acpi_status status; | |
516 | struct acpi_buffer output; | |
517 | union acpi_object *out_obj; | |
518 | ||
519 | if (ide_noacpi) | |
520 | return; | |
521 | ||
522 | DEBPRINT("ENTER:\n"); | |
523 | ||
524 | if (!hwif->acpidata) { | |
525 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
526 | return; | |
527 | } | |
528 | ||
529 | /* Setting up output buffer for _GTM */ | |
530 | output.length = ACPI_ALLOCATE_BUFFER; | |
531 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
532 | ||
533 | /* _GTM has no input parameters */ | |
534 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", | |
535 | NULL, &output); | |
536 | ||
537 | DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", | |
538 | status, output.pointer, | |
539 | (unsigned long long)output.length); | |
540 | ||
541 | if (ACPI_FAILURE(status)) { | |
542 | DEBPRINT("Run _GTM error: status = 0x%x\n", status); | |
543 | return; | |
544 | } | |
545 | ||
546 | if (!output.length || !output.pointer) { | |
547 | DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", | |
548 | (unsigned long long)output.length, | |
549 | output.pointer); | |
550 | kfree(output.pointer); | |
551 | return; | |
552 | } | |
553 | ||
554 | out_obj = output.pointer; | |
555 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
556 | kfree(output.pointer); | |
557 | DEBPRINT("Run _GTM: error: " | |
558 | "expected object type of ACPI_TYPE_BUFFER, " | |
559 | "got 0x%x\n", out_obj->type); | |
560 | return; | |
561 | } | |
562 | ||
563 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
564 | out_obj->buffer.length != sizeof(struct GTM_buffer)) { | |
565 | kfree(output.pointer); | |
566 | printk(KERN_ERR | |
1e8f34f7 AM |
567 | "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " |
568 | "addr (0x%p)\n", | |
569 | __FUNCTION__, out_obj->buffer.length, | |
570 | sizeof(struct GTM_buffer), out_obj->buffer.pointer); | |
e3a59b4d HR |
571 | return; |
572 | } | |
573 | ||
574 | memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, | |
575 | sizeof(struct GTM_buffer)); | |
576 | ||
577 | DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n", | |
578 | out_obj->buffer.pointer, out_obj->buffer.length, | |
579 | sizeof(struct GTM_buffer)); | |
580 | ||
581 | DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", | |
582 | hwif->acpidata->gtm.PIO_speed0, | |
583 | hwif->acpidata->gtm.DMA_speed0, | |
584 | hwif->acpidata->gtm.PIO_speed1, | |
585 | hwif->acpidata->gtm.DMA_speed1, | |
586 | hwif->acpidata->gtm.GTM_flags); | |
587 | ||
588 | kfree(output.pointer); | |
589 | } | |
590 | EXPORT_SYMBOL_GPL(ide_acpi_get_timing); | |
591 | ||
592 | /** | |
593 | * ide_acpi_push_timing - set the channel (controller) timings | |
594 | * @hwif: target IDE interface (channel) | |
595 | * | |
596 | * This function executes the _STM ACPI method for the target channel. | |
597 | * | |
598 | * _STM requires Identify Drive data, which has to passed as an argument. | |
599 | * Unfortunately hd_driveid is a mangled version which we can't readily | |
600 | * use; hence we'll get the information afresh. | |
601 | */ | |
602 | void ide_acpi_push_timing(ide_hwif_t *hwif) | |
603 | { | |
604 | acpi_status status; | |
605 | struct acpi_object_list input; | |
606 | union acpi_object in_params[3]; | |
607 | struct ide_acpi_drive_link *master = &hwif->acpidata->master; | |
608 | struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; | |
609 | ||
610 | if (ide_noacpi) | |
611 | return; | |
612 | ||
613 | DEBPRINT("ENTER:\n"); | |
614 | ||
615 | if (!hwif->acpidata) { | |
616 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
617 | return; | |
618 | } | |
619 | ||
620 | /* Give the GTM buffer + drive Identify data to the channel via the | |
621 | * _STM method: */ | |
622 | /* setup input parameters buffer for _STM */ | |
623 | input.count = 3; | |
624 | input.pointer = in_params; | |
625 | in_params[0].type = ACPI_TYPE_BUFFER; | |
626 | in_params[0].buffer.length = sizeof(struct GTM_buffer); | |
627 | in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; | |
628 | in_params[1].type = ACPI_TYPE_BUFFER; | |
629 | in_params[1].buffer.length = sizeof(struct hd_driveid); | |
630 | in_params[1].buffer.pointer = (u8 *)&master->idbuff; | |
631 | in_params[2].type = ACPI_TYPE_BUFFER; | |
632 | in_params[2].buffer.length = sizeof(struct hd_driveid); | |
633 | in_params[2].buffer.pointer = (u8 *)&slave->idbuff; | |
634 | /* Output buffer: _STM has no output */ | |
635 | ||
636 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", | |
637 | &input, NULL); | |
638 | ||
639 | if (ACPI_FAILURE(status)) { | |
640 | DEBPRINT("Run _STM error: status = 0x%x\n", status); | |
641 | } | |
642 | DEBPRINT("_STM status: %d\n", status); | |
643 | } | |
644 | EXPORT_SYMBOL_GPL(ide_acpi_push_timing); | |
645 | ||
5e32132b SL |
646 | /** |
647 | * ide_acpi_set_state - set the channel power state | |
648 | * @hwif: target IDE interface | |
649 | * @on: state, on/off | |
650 | * | |
651 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
652 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
653 | */ | |
654 | void ide_acpi_set_state(ide_hwif_t *hwif, int on) | |
655 | { | |
656 | int unit; | |
657 | ||
90494893 | 658 | if (ide_noacpi || ide_noacpi_psx) |
5e32132b SL |
659 | return; |
660 | ||
661 | DEBPRINT("ENTER:\n"); | |
662 | ||
663 | if (!hwif->acpidata) { | |
664 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
665 | return; | |
666 | } | |
667 | /* channel first and then drives for power on and verse versa for power off */ | |
668 | if (on) | |
669 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); | |
670 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
671 | ide_drive_t *drive = &hwif->drives[unit]; | |
672 | ||
673 | if (!drive->acpidata->obj_handle) | |
674 | drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); | |
675 | ||
676 | if (drive->acpidata->obj_handle && drive->present) { | |
677 | acpi_bus_set_power(drive->acpidata->obj_handle, | |
678 | on? ACPI_STATE_D0: ACPI_STATE_D3); | |
679 | } | |
680 | } | |
681 | if (!on) | |
682 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); | |
683 | } | |
5e32132b | 684 | |
e3a59b4d HR |
685 | /** |
686 | * ide_acpi_init - initialize the ACPI link for an IDE interface | |
687 | * @hwif: target IDE interface (channel) | |
688 | * | |
689 | * The ACPI spec is not quite clear when the drive identify buffer | |
690 | * should be obtained. Calling IDENTIFY DEVICE during shutdown | |
691 | * is not the best of ideas as the drive might already being put to | |
692 | * sleep. And obviously we can't call it during resume. | |
693 | * So we get the information during startup; but this means that | |
694 | * any changes during run-time will be lost after resume. | |
695 | */ | |
696 | void ide_acpi_init(ide_hwif_t *hwif) | |
697 | { | |
698 | int unit; | |
699 | int err; | |
700 | struct ide_acpi_drive_link *master; | |
701 | struct ide_acpi_drive_link *slave; | |
702 | ||
90494893 SL |
703 | ide_acpi_blacklist(); |
704 | ||
e3a59b4d HR |
705 | hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); |
706 | if (!hwif->acpidata) | |
707 | return; | |
708 | ||
709 | hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); | |
710 | if (!hwif->acpidata->obj_handle) { | |
711 | DEBPRINT("no ACPI object for %s found\n", hwif->name); | |
712 | kfree(hwif->acpidata); | |
713 | hwif->acpidata = NULL; | |
714 | return; | |
715 | } | |
716 | ||
717 | /* | |
718 | * The ACPI spec mandates that we send information | |
719 | * for both drives, regardless whether they are connected | |
720 | * or not. | |
721 | */ | |
722 | hwif->acpidata->master.drive = &hwif->drives[0]; | |
723 | hwif->drives[0].acpidata = &hwif->acpidata->master; | |
724 | master = &hwif->acpidata->master; | |
725 | ||
726 | hwif->acpidata->slave.drive = &hwif->drives[1]; | |
727 | hwif->drives[1].acpidata = &hwif->acpidata->slave; | |
728 | slave = &hwif->acpidata->slave; | |
729 | ||
730 | ||
731 | /* | |
732 | * Send IDENTIFY for each drive | |
733 | */ | |
734 | if (master->drive->present) { | |
735 | err = taskfile_lib_get_identify(master->drive, master->idbuff); | |
736 | if (err) { | |
737 | DEBPRINT("identify device %s failed (%d)\n", | |
738 | master->drive->name, err); | |
739 | } | |
740 | } | |
741 | ||
742 | if (slave->drive->present) { | |
743 | err = taskfile_lib_get_identify(slave->drive, slave->idbuff); | |
744 | if (err) { | |
745 | DEBPRINT("identify device %s failed (%d)\n", | |
746 | slave->drive->name, err); | |
747 | } | |
748 | } | |
749 | ||
750 | if (ide_noacpionboot) { | |
751 | DEBPRINT("ACPI methods disabled on boot\n"); | |
752 | return; | |
753 | } | |
754 | ||
5e32132b SL |
755 | /* ACPI _PS0 before _STM */ |
756 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d HR |
757 | /* |
758 | * ACPI requires us to call _STM on startup | |
759 | */ | |
760 | ide_acpi_get_timing(hwif); | |
761 | ide_acpi_push_timing(hwif); | |
762 | ||
763 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
764 | ide_drive_t *drive = &hwif->drives[unit]; | |
765 | ||
766 | if (drive->present) { | |
767 | /* Execute ACPI startup code */ | |
768 | ide_acpi_exec_tfs(drive); | |
769 | } | |
770 | } | |
771 | } | |
772 | EXPORT_SYMBOL_GPL(ide_acpi_init); |