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 | ||
92 | static int ide_acpi_blacklist(void) | |
93 | { | |
94 | static int done; | |
95 | if (done) | |
96 | return 0; | |
97 | done = 1; | |
98 | dmi_check_system(ide_acpi_dmi_table); | |
99 | return 0; | |
100 | } | |
101 | ||
e3a59b4d HR |
102 | /** |
103 | * ide_get_dev_handle - finds acpi_handle and PCI device.function | |
104 | * @dev: device to locate | |
105 | * @handle: returned acpi_handle for @dev | |
106 | * @pcidevfn: return PCI device.func for @dev | |
107 | * | |
108 | * Returns the ACPI object handle to the corresponding PCI device. | |
109 | * | |
110 | * Returns 0 on success, <0 on error. | |
111 | */ | |
112 | static int ide_get_dev_handle(struct device *dev, acpi_handle *handle, | |
113 | acpi_integer *pcidevfn) | |
114 | { | |
115 | struct pci_dev *pdev = to_pci_dev(dev); | |
116 | unsigned int bus, devnum, func; | |
117 | acpi_integer addr; | |
118 | acpi_handle dev_handle; | |
119 | struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER, | |
120 | .pointer = NULL}; | |
121 | acpi_status status; | |
122 | struct acpi_device_info *dinfo = NULL; | |
123 | int ret = -ENODEV; | |
124 | ||
125 | bus = pdev->bus->number; | |
126 | devnum = PCI_SLOT(pdev->devfn); | |
127 | func = PCI_FUNC(pdev->devfn); | |
128 | /* ACPI _ADR encoding for PCI bus: */ | |
129 | addr = (acpi_integer)(devnum << 16 | func); | |
130 | ||
131 | DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func); | |
132 | ||
133 | dev_handle = DEVICE_ACPI_HANDLE(dev); | |
134 | if (!dev_handle) { | |
135 | DEBPRINT("no acpi handle for device\n"); | |
136 | goto err; | |
137 | } | |
138 | ||
139 | status = acpi_get_object_info(dev_handle, &buffer); | |
140 | if (ACPI_FAILURE(status)) { | |
141 | DEBPRINT("get_object_info for device failed\n"); | |
142 | goto err; | |
143 | } | |
144 | dinfo = buffer.pointer; | |
145 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && | |
146 | dinfo->address == addr) { | |
147 | *pcidevfn = addr; | |
148 | *handle = dev_handle; | |
149 | } else { | |
150 | DEBPRINT("get_object_info for device has wrong " | |
151 | " address: %llu, should be %u\n", | |
152 | dinfo ? (unsigned long long)dinfo->address : -1ULL, | |
153 | (unsigned int)addr); | |
154 | goto err; | |
155 | } | |
156 | ||
157 | DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n", | |
158 | devnum, func, (unsigned long long)addr, *handle); | |
159 | ret = 0; | |
160 | err: | |
161 | kfree(dinfo); | |
162 | return ret; | |
163 | } | |
164 | ||
165 | /** | |
166 | * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif | |
167 | * @hwif: device to locate | |
168 | * | |
169 | * Retrieves the object handle for a given hwif. | |
170 | * | |
171 | * Returns handle on success, 0 on error. | |
172 | */ | |
173 | static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) | |
174 | { | |
175 | struct device *dev = hwif->gendev.parent; | |
1dcfdf93 | 176 | acpi_handle uninitialized_var(dev_handle); |
e3a59b4d HR |
177 | acpi_integer pcidevfn; |
178 | acpi_handle chan_handle; | |
179 | int err; | |
180 | ||
181 | DEBPRINT("ENTER: device %s\n", hwif->name); | |
182 | ||
183 | if (!dev) { | |
184 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
185 | return NULL; | |
186 | } | |
187 | ||
188 | err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn); | |
189 | if (err < 0) { | |
190 | DEBPRINT("ide_get_dev_handle failed (%d)\n", err); | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | /* get child objects of dev_handle == channel objects, | |
195 | * + _their_ children == drive objects */ | |
196 | /* channel is hwif->channel */ | |
197 | chan_handle = acpi_get_child(dev_handle, hwif->channel); | |
198 | DEBPRINT("chan adr=%d: handle=0x%p\n", | |
199 | hwif->channel, chan_handle); | |
200 | ||
201 | return chan_handle; | |
202 | } | |
203 | ||
e3a59b4d HR |
204 | /** |
205 | * do_drive_get_GTF - get the drive bootup default taskfile settings | |
206 | * @drive: the drive for which the taskfile settings should be retrieved | |
207 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address | |
208 | * @gtf_address: buffer containing _GTF taskfile arrays | |
209 | * | |
210 | * The _GTF method has no input parameters. | |
211 | * It returns a variable number of register set values (registers | |
212 | * hex 1F1..1F7, taskfiles). | |
213 | * The <variable number> is not known in advance, so have ACPI-CA | |
214 | * allocate the buffer as needed and return it, then free it later. | |
215 | * | |
216 | * The returned @gtf_length and @gtf_address are only valid if the | |
217 | * function return value is 0. | |
218 | */ | |
219 | static int do_drive_get_GTF(ide_drive_t *drive, | |
220 | unsigned int *gtf_length, unsigned long *gtf_address, | |
221 | unsigned long *obj_loc) | |
222 | { | |
223 | acpi_status status; | |
224 | struct acpi_buffer output; | |
225 | union acpi_object *out_obj; | |
898ec223 | 226 | ide_hwif_t *hwif = drive->hwif; |
e3a59b4d HR |
227 | struct device *dev = hwif->gendev.parent; |
228 | int err = -ENODEV; | |
229 | int port; | |
230 | ||
231 | *gtf_length = 0; | |
232 | *gtf_address = 0UL; | |
233 | *obj_loc = 0UL; | |
234 | ||
235 | if (ide_noacpi) | |
236 | return 0; | |
237 | ||
238 | if (!dev) { | |
239 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
240 | goto out; | |
241 | } | |
242 | ||
243 | if (!hwif->acpidata) { | |
244 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
245 | goto out; | |
246 | } | |
247 | ||
248 | port = hwif->channel ? drive->dn - 2: drive->dn; | |
249 | ||
e3a59b4d | 250 | DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n", |
e5461f38 | 251 | hwif->name, dev_name(dev), port, hwif->channel); |
e3a59b4d | 252 | |
97100fc8 | 253 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) { |
e3a59b4d HR |
254 | DEBPRINT("%s drive %d:%d not present\n", |
255 | hwif->name, hwif->channel, port); | |
256 | goto out; | |
257 | } | |
258 | ||
e3a59b4d | 259 | if (!drive->acpidata->obj_handle) { |
8cd3c605 BZ |
260 | DEBPRINT("No ACPI object found for %s\n", drive->name); |
261 | goto out; | |
e3a59b4d HR |
262 | } |
263 | ||
264 | /* Setting up output buffer */ | |
265 | output.length = ACPI_ALLOCATE_BUFFER; | |
266 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
267 | ||
268 | /* _GTF has no input parameters */ | |
269 | err = -EIO; | |
270 | status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF", | |
271 | NULL, &output); | |
272 | if (ACPI_FAILURE(status)) { | |
273 | printk(KERN_DEBUG | |
274 | "%s: Run _GTF error: status = 0x%x\n", | |
eb63963a | 275 | __func__, status); |
e3a59b4d HR |
276 | goto out; |
277 | } | |
278 | ||
279 | if (!output.length || !output.pointer) { | |
280 | DEBPRINT("Run _GTF: " | |
281 | "length or ptr is NULL (0x%llx, 0x%p)\n", | |
282 | (unsigned long long)output.length, | |
283 | output.pointer); | |
284 | goto out; | |
285 | } | |
286 | ||
287 | out_obj = output.pointer; | |
288 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
289 | DEBPRINT("Run _GTF: error: " | |
290 | "expected object type of ACPI_TYPE_BUFFER, " | |
291 | "got 0x%x\n", out_obj->type); | |
292 | err = -ENOENT; | |
293 | kfree(output.pointer); | |
294 | goto out; | |
295 | } | |
296 | ||
297 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
298 | out_obj->buffer.length % REGS_PER_GTF) { | |
299 | printk(KERN_ERR | |
300 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", | |
eb63963a | 301 | __func__, out_obj->buffer.length, |
e3a59b4d HR |
302 | out_obj->buffer.pointer); |
303 | err = -ENOENT; | |
304 | kfree(output.pointer); | |
305 | goto out; | |
306 | } | |
307 | ||
308 | *gtf_length = out_obj->buffer.length; | |
309 | *gtf_address = (unsigned long)out_obj->buffer.pointer; | |
310 | *obj_loc = (unsigned long)out_obj; | |
311 | DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", | |
312 | *gtf_length, *gtf_address, *obj_loc); | |
313 | err = 0; | |
314 | out: | |
315 | return err; | |
316 | } | |
317 | ||
318 | /** | |
319 | * taskfile_load_raw - send taskfile registers to drive | |
320 | * @drive: drive to which output is sent | |
321 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) | |
322 | * | |
323 | * Outputs IDE taskfile to the drive. | |
324 | */ | |
325 | static int taskfile_load_raw(ide_drive_t *drive, | |
326 | const struct taskfile_array *gtf) | |
327 | { | |
328 | ide_task_t args; | |
329 | int err = 0; | |
330 | ||
331 | DEBPRINT("(0x1f1-1f7): hex: " | |
332 | "%02x %02x %02x %02x %02x %02x %02x\n", | |
333 | gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], | |
334 | gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); | |
335 | ||
336 | memset(&args, 0, sizeof(ide_task_t)); | |
e3a59b4d HR |
337 | |
338 | /* convert gtf to IDE Taskfile */ | |
650d841d | 339 | memcpy(&args.tf_array[7], >f->tfa, 7); |
657cc1a8 | 340 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
e3a59b4d | 341 | |
1dbfeb4b | 342 | if (!ide_acpigtf) { |
e3a59b4d HR |
343 | DEBPRINT("_GTF execution disabled\n"); |
344 | return err; | |
345 | } | |
346 | ||
9a3c49be | 347 | err = ide_no_data_taskfile(drive, &args); |
e3a59b4d | 348 | if (err) |
9a3c49be | 349 | printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", |
eb63963a | 350 | __func__, err); |
e3a59b4d HR |
351 | |
352 | return err; | |
353 | } | |
354 | ||
355 | /** | |
356 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF | |
357 | * @drive: the drive to which the taskfile command should be sent | |
358 | * @gtf_length: total number of bytes of _GTF taskfiles | |
359 | * @gtf_address: location of _GTF taskfile arrays | |
360 | * | |
361 | * Write {gtf_address, length gtf_length} in groups of | |
362 | * REGS_PER_GTF bytes. | |
363 | */ | |
364 | static int do_drive_set_taskfiles(ide_drive_t *drive, | |
365 | unsigned int gtf_length, | |
366 | unsigned long gtf_address) | |
367 | { | |
368 | int rc = -ENODEV, err; | |
369 | int gtf_count = gtf_length / REGS_PER_GTF; | |
370 | int ix; | |
371 | struct taskfile_array *gtf; | |
372 | ||
373 | if (ide_noacpi) | |
374 | return 0; | |
375 | ||
376 | DEBPRINT("ENTER: %s, hard_port#: %d\n", drive->name, drive->dn); | |
377 | ||
97100fc8 | 378 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
e3a59b4d | 379 | goto out; |
97100fc8 | 380 | |
e3a59b4d HR |
381 | if (!gtf_count) /* shouldn't be here */ |
382 | goto out; | |
383 | ||
384 | DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", | |
385 | gtf_length, gtf_length, gtf_count, gtf_address); | |
386 | ||
387 | if (gtf_length % REGS_PER_GTF) { | |
388 | printk(KERN_ERR "%s: unexpected GTF length (%d)\n", | |
eb63963a | 389 | __func__, gtf_length); |
e3a59b4d HR |
390 | goto out; |
391 | } | |
392 | ||
393 | rc = 0; | |
394 | for (ix = 0; ix < gtf_count; ix++) { | |
395 | gtf = (struct taskfile_array *) | |
396 | (gtf_address + ix * REGS_PER_GTF); | |
397 | ||
398 | /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ | |
399 | err = taskfile_load_raw(drive, gtf); | |
400 | if (err) | |
401 | rc = err; | |
402 | } | |
403 | ||
404 | out: | |
405 | return rc; | |
406 | } | |
407 | ||
408 | /** | |
409 | * ide_acpi_exec_tfs - get then write drive taskfile settings | |
410 | * @drive: the drive for which the taskfile settings should be | |
411 | * written. | |
412 | * | |
413 | * According to the ACPI spec this should be called after _STM | |
414 | * has been evaluated for the interface. Some ACPI vendors interpret | |
415 | * that as a hard requirement and modify the taskfile according | |
416 | * to the Identify Drive information passed down with _STM. | |
417 | * So one should really make sure to call this only after _STM has | |
418 | * been executed. | |
419 | */ | |
420 | int ide_acpi_exec_tfs(ide_drive_t *drive) | |
421 | { | |
422 | int ret; | |
423 | unsigned int gtf_length; | |
424 | unsigned long gtf_address; | |
425 | unsigned long obj_loc; | |
426 | ||
427 | if (ide_noacpi) | |
428 | return 0; | |
429 | ||
430 | DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); | |
431 | ||
432 | ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); | |
433 | if (ret < 0) { | |
434 | DEBPRINT("get_GTF error (%d)\n", ret); | |
435 | return ret; | |
436 | } | |
437 | ||
438 | DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); | |
439 | ||
440 | ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); | |
441 | kfree((void *)obj_loc); | |
442 | if (ret < 0) { | |
443 | DEBPRINT("set_taskfiles error (%d)\n", ret); | |
444 | } | |
445 | ||
446 | DEBPRINT("ret=%d\n", ret); | |
447 | ||
448 | return ret; | |
449 | } | |
e3a59b4d HR |
450 | |
451 | /** | |
452 | * ide_acpi_get_timing - get the channel (controller) timings | |
453 | * @hwif: target IDE interface (channel) | |
454 | * | |
455 | * This function executes the _GTM ACPI method for the target channel. | |
456 | * | |
457 | */ | |
458 | void ide_acpi_get_timing(ide_hwif_t *hwif) | |
459 | { | |
460 | acpi_status status; | |
461 | struct acpi_buffer output; | |
462 | union acpi_object *out_obj; | |
463 | ||
464 | if (ide_noacpi) | |
465 | return; | |
466 | ||
467 | DEBPRINT("ENTER:\n"); | |
468 | ||
469 | if (!hwif->acpidata) { | |
470 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
471 | return; | |
472 | } | |
473 | ||
474 | /* Setting up output buffer for _GTM */ | |
475 | output.length = ACPI_ALLOCATE_BUFFER; | |
476 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
477 | ||
478 | /* _GTM has no input parameters */ | |
479 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", | |
480 | NULL, &output); | |
481 | ||
482 | DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", | |
483 | status, output.pointer, | |
484 | (unsigned long long)output.length); | |
485 | ||
486 | if (ACPI_FAILURE(status)) { | |
487 | DEBPRINT("Run _GTM error: status = 0x%x\n", status); | |
488 | return; | |
489 | } | |
490 | ||
491 | if (!output.length || !output.pointer) { | |
492 | DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", | |
493 | (unsigned long long)output.length, | |
494 | output.pointer); | |
495 | kfree(output.pointer); | |
496 | return; | |
497 | } | |
498 | ||
499 | out_obj = output.pointer; | |
500 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
501 | kfree(output.pointer); | |
502 | DEBPRINT("Run _GTM: error: " | |
503 | "expected object type of ACPI_TYPE_BUFFER, " | |
504 | "got 0x%x\n", out_obj->type); | |
505 | return; | |
506 | } | |
507 | ||
508 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
509 | out_obj->buffer.length != sizeof(struct GTM_buffer)) { | |
510 | kfree(output.pointer); | |
511 | printk(KERN_ERR | |
1e8f34f7 AM |
512 | "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " |
513 | "addr (0x%p)\n", | |
eb63963a | 514 | __func__, out_obj->buffer.length, |
1e8f34f7 | 515 | sizeof(struct GTM_buffer), out_obj->buffer.pointer); |
e3a59b4d HR |
516 | return; |
517 | } | |
518 | ||
519 | memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, | |
520 | sizeof(struct GTM_buffer)); | |
521 | ||
522 | DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n", | |
523 | out_obj->buffer.pointer, out_obj->buffer.length, | |
524 | sizeof(struct GTM_buffer)); | |
525 | ||
526 | DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", | |
527 | hwif->acpidata->gtm.PIO_speed0, | |
528 | hwif->acpidata->gtm.DMA_speed0, | |
529 | hwif->acpidata->gtm.PIO_speed1, | |
530 | hwif->acpidata->gtm.DMA_speed1, | |
531 | hwif->acpidata->gtm.GTM_flags); | |
532 | ||
533 | kfree(output.pointer); | |
534 | } | |
e3a59b4d HR |
535 | |
536 | /** | |
537 | * ide_acpi_push_timing - set the channel (controller) timings | |
538 | * @hwif: target IDE interface (channel) | |
539 | * | |
540 | * This function executes the _STM ACPI method for the target channel. | |
541 | * | |
542 | * _STM requires Identify Drive data, which has to passed as an argument. | |
4dde4492 | 543 | * Unfortunately drive->id is a mangled version which we can't readily |
e3a59b4d HR |
544 | * use; hence we'll get the information afresh. |
545 | */ | |
546 | void ide_acpi_push_timing(ide_hwif_t *hwif) | |
547 | { | |
548 | acpi_status status; | |
549 | struct acpi_object_list input; | |
550 | union acpi_object in_params[3]; | |
551 | struct ide_acpi_drive_link *master = &hwif->acpidata->master; | |
552 | struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; | |
553 | ||
554 | if (ide_noacpi) | |
555 | return; | |
556 | ||
557 | DEBPRINT("ENTER:\n"); | |
558 | ||
559 | if (!hwif->acpidata) { | |
560 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
561 | return; | |
562 | } | |
563 | ||
564 | /* Give the GTM buffer + drive Identify data to the channel via the | |
565 | * _STM method: */ | |
566 | /* setup input parameters buffer for _STM */ | |
567 | input.count = 3; | |
568 | input.pointer = in_params; | |
569 | in_params[0].type = ACPI_TYPE_BUFFER; | |
570 | in_params[0].buffer.length = sizeof(struct GTM_buffer); | |
571 | in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; | |
572 | in_params[1].type = ACPI_TYPE_BUFFER; | |
0e63a588 | 573 | in_params[1].buffer.length = ATA_ID_WORDS * 2; |
e3a59b4d HR |
574 | in_params[1].buffer.pointer = (u8 *)&master->idbuff; |
575 | in_params[2].type = ACPI_TYPE_BUFFER; | |
0e63a588 | 576 | in_params[2].buffer.length = ATA_ID_WORDS * 2; |
e3a59b4d HR |
577 | in_params[2].buffer.pointer = (u8 *)&slave->idbuff; |
578 | /* Output buffer: _STM has no output */ | |
579 | ||
580 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", | |
581 | &input, NULL); | |
582 | ||
583 | if (ACPI_FAILURE(status)) { | |
584 | DEBPRINT("Run _STM error: status = 0x%x\n", status); | |
585 | } | |
586 | DEBPRINT("_STM status: %d\n", status); | |
587 | } | |
e3a59b4d | 588 | |
5e32132b SL |
589 | /** |
590 | * ide_acpi_set_state - set the channel power state | |
591 | * @hwif: target IDE interface | |
592 | * @on: state, on/off | |
593 | * | |
594 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
595 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
596 | */ | |
597 | void ide_acpi_set_state(ide_hwif_t *hwif, int on) | |
598 | { | |
2bd24a1c BZ |
599 | ide_drive_t *drive; |
600 | int i; | |
5e32132b | 601 | |
90494893 | 602 | if (ide_noacpi || ide_noacpi_psx) |
5e32132b SL |
603 | return; |
604 | ||
605 | DEBPRINT("ENTER:\n"); | |
606 | ||
607 | if (!hwif->acpidata) { | |
608 | DEBPRINT("no ACPI data for %s\n", hwif->name); | |
609 | return; | |
610 | } | |
611 | /* channel first and then drives for power on and verse versa for power off */ | |
612 | if (on) | |
613 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); | |
5e32132b | 614 | |
2bd24a1c | 615 | ide_port_for_each_dev(i, drive, hwif) { |
97100fc8 BZ |
616 | if (drive->acpidata->obj_handle && |
617 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
5e32132b SL |
618 | acpi_bus_set_power(drive->acpidata->obj_handle, |
619 | on? ACPI_STATE_D0: ACPI_STATE_D3); | |
620 | } | |
621 | } | |
622 | if (!on) | |
623 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); | |
624 | } | |
5e32132b | 625 | |
e3a59b4d HR |
626 | /** |
627 | * ide_acpi_init - initialize the ACPI link for an IDE interface | |
628 | * @hwif: target IDE interface (channel) | |
629 | * | |
630 | * The ACPI spec is not quite clear when the drive identify buffer | |
631 | * should be obtained. Calling IDENTIFY DEVICE during shutdown | |
632 | * is not the best of ideas as the drive might already being put to | |
633 | * sleep. And obviously we can't call it during resume. | |
634 | * So we get the information during startup; but this means that | |
635 | * any changes during run-time will be lost after resume. | |
636 | */ | |
637 | void ide_acpi_init(ide_hwif_t *hwif) | |
638 | { | |
90494893 SL |
639 | ide_acpi_blacklist(); |
640 | ||
e3a59b4d HR |
641 | hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); |
642 | if (!hwif->acpidata) | |
643 | return; | |
644 | ||
645 | hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); | |
646 | if (!hwif->acpidata->obj_handle) { | |
647 | DEBPRINT("no ACPI object for %s found\n", hwif->name); | |
648 | kfree(hwif->acpidata); | |
649 | hwif->acpidata = NULL; | |
e3a59b4d | 650 | } |
eafd88a3 BZ |
651 | } |
652 | ||
653 | void ide_acpi_port_init_devices(ide_hwif_t *hwif) | |
654 | { | |
655 | ide_drive_t *drive; | |
656 | int i, err; | |
657 | ||
658 | if (hwif->acpidata == NULL) | |
659 | return; | |
e3a59b4d HR |
660 | |
661 | /* | |
662 | * The ACPI spec mandates that we send information | |
663 | * for both drives, regardless whether they are connected | |
664 | * or not. | |
665 | */ | |
5e7f3a46 BZ |
666 | hwif->devices[0]->acpidata = &hwif->acpidata->master; |
667 | hwif->devices[1]->acpidata = &hwif->acpidata->slave; | |
e3a59b4d | 668 | |
8cd3c605 BZ |
669 | /* get _ADR info for each device */ |
670 | ide_port_for_each_dev(i, drive, hwif) { | |
671 | acpi_handle dev_handle; | |
672 | ||
673 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
674 | continue; | |
675 | ||
676 | DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", | |
677 | drive->name, hwif->channel, drive->dn & 1); | |
678 | ||
679 | /* TBD: could also check ACPI object VALID bits */ | |
680 | dev_handle = acpi_get_child(hwif->acpidata->obj_handle, | |
681 | drive->dn & 1); | |
682 | ||
683 | DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle); | |
684 | ||
685 | drive->acpidata->obj_handle = dev_handle; | |
686 | } | |
687 | ||
e3a59b4d HR |
688 | /* |
689 | * Send IDENTIFY for each drive | |
690 | */ | |
2bd24a1c | 691 | ide_port_for_each_dev(i, drive, hwif) { |
97100fc8 | 692 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
eafd88a3 | 693 | continue; |
e3a59b4d | 694 | |
eafd88a3 BZ |
695 | err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff); |
696 | if (err) | |
e3a59b4d | 697 | DEBPRINT("identify device %s failed (%d)\n", |
eafd88a3 | 698 | drive->name, err); |
e3a59b4d HR |
699 | } |
700 | ||
1dbfeb4b | 701 | if (!ide_acpionboot) { |
e3a59b4d HR |
702 | DEBPRINT("ACPI methods disabled on boot\n"); |
703 | return; | |
704 | } | |
705 | ||
5e32132b SL |
706 | /* ACPI _PS0 before _STM */ |
707 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d HR |
708 | /* |
709 | * ACPI requires us to call _STM on startup | |
710 | */ | |
711 | ide_acpi_get_timing(hwif); | |
712 | ide_acpi_push_timing(hwif); | |
713 | ||
2bd24a1c | 714 | ide_port_for_each_dev(i, drive, hwif) { |
97100fc8 | 715 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
e3a59b4d HR |
716 | /* Execute ACPI startup code */ |
717 | ide_acpi_exec_tfs(drive); | |
e3a59b4d HR |
718 | } |
719 | } |