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 | ||
7b199811 | 10 | #include <linux/acpi.h> |
e3a59b4d HR |
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> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
e3a59b4d HR |
17 | #include <linux/ide.h> |
18 | #include <linux/pci.h> | |
90494893 | 19 | #include <linux/dmi.h> |
bff7832d | 20 | #include <linux/module.h> |
e3a59b4d | 21 | |
e3a59b4d | 22 | #define REGS_PER_GTF 7 |
e3a59b4d HR |
23 | |
24 | struct GTM_buffer { | |
25 | u32 PIO_speed0; | |
26 | u32 DMA_speed0; | |
27 | u32 PIO_speed1; | |
28 | u32 DMA_speed1; | |
29 | u32 GTM_flags; | |
30 | }; | |
31 | ||
32 | struct ide_acpi_drive_link { | |
e3a59b4d HR |
33 | acpi_handle obj_handle; |
34 | u8 idbuff[512]; | |
35 | }; | |
36 | ||
37 | struct ide_acpi_hwif_link { | |
38 | ide_hwif_t *hwif; | |
39 | acpi_handle obj_handle; | |
40 | struct GTM_buffer gtm; | |
41 | struct ide_acpi_drive_link master; | |
42 | struct ide_acpi_drive_link slave; | |
43 | }; | |
44 | ||
45 | #undef DEBUGGING | |
46 | /* note: adds function name and KERN_DEBUG */ | |
47 | #ifdef DEBUGGING | |
48 | #define DEBPRINT(fmt, args...) \ | |
eb63963a | 49 | printk(KERN_DEBUG "%s: " fmt, __func__, ## args) |
e3a59b4d HR |
50 | #else |
51 | #define DEBPRINT(fmt, args...) do {} while (0) | |
52 | #endif /* DEBUGGING */ | |
53 | ||
90ab5ee9 | 54 | static bool ide_noacpi; |
1dbfeb4b BZ |
55 | module_param_named(noacpi, ide_noacpi, bool, 0); |
56 | MODULE_PARM_DESC(noacpi, "disable IDE ACPI support"); | |
57 | ||
90ab5ee9 | 58 | static bool ide_acpigtf; |
1dbfeb4b BZ |
59 | module_param_named(acpigtf, ide_acpigtf, bool, 0); |
60 | MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support"); | |
61 | ||
90ab5ee9 | 62 | static bool ide_acpionboot; |
1dbfeb4b BZ |
63 | module_param_named(acpionboot, ide_acpionboot, bool, 0); |
64 | MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot"); | |
e3a59b4d | 65 | |
90494893 SL |
66 | static bool ide_noacpi_psx; |
67 | static int no_acpi_psx(const struct dmi_system_id *id) | |
68 | { | |
69 | ide_noacpi_psx = true; | |
70 | printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident); | |
71 | return 0; | |
72 | } | |
73 | ||
74 | static const struct dmi_system_id ide_acpi_dmi_table[] = { | |
75 | /* Bug 9673. */ | |
76 | /* We should check if this is because ACPI NVS isn't save/restored. */ | |
77 | { | |
78 | .callback = no_acpi_psx, | |
79 | .ident = "HP nx9005", | |
80 | .matches = { | |
81 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."), | |
82 | DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60") | |
83 | }, | |
84 | }, | |
7c48c56e JG |
85 | |
86 | { } /* terminate list */ | |
90494893 SL |
87 | }; |
88 | ||
8b803bd1 | 89 | int ide_acpi_init(void) |
90494893 | 90 | { |
90494893 SL |
91 | dmi_check_system(ide_acpi_dmi_table); |
92 | return 0; | |
93 | } | |
94 | ||
2bf427b2 BZ |
95 | bool ide_port_acpi(ide_hwif_t *hwif) |
96 | { | |
97 | return ide_noacpi == 0 && hwif->acpidata; | |
98 | } | |
99 | ||
bfecc2b3 RW |
100 | static acpi_handle acpi_get_child(acpi_handle handle, u64 addr) |
101 | { | |
102 | struct acpi_device *adev; | |
103 | ||
104 | if (!handle || acpi_bus_get_device(handle, &adev)) | |
105 | return NULL; | |
106 | ||
107 | adev = acpi_find_child_device(adev, addr, false); | |
108 | return adev ? adev->handle : NULL; | |
109 | } | |
110 | ||
e3a59b4d HR |
111 | /** |
112 | * ide_get_dev_handle - finds acpi_handle and PCI device.function | |
113 | * @dev: device to locate | |
114 | * @handle: returned acpi_handle for @dev | |
115 | * @pcidevfn: return PCI device.func for @dev | |
116 | * | |
117 | * Returns the ACPI object handle to the corresponding PCI device. | |
118 | * | |
119 | * Returns 0 on success, <0 on error. | |
120 | */ | |
121 | static int ide_get_dev_handle(struct device *dev, acpi_handle *handle, | |
439913ff | 122 | u64 *pcidevfn) |
e3a59b4d HR |
123 | { |
124 | struct pci_dev *pdev = to_pci_dev(dev); | |
125 | unsigned int bus, devnum, func; | |
439913ff | 126 | u64 addr; |
e3a59b4d | 127 | acpi_handle dev_handle; |
e3a59b4d HR |
128 | acpi_status status; |
129 | struct acpi_device_info *dinfo = NULL; | |
130 | int ret = -ENODEV; | |
131 | ||
132 | bus = pdev->bus->number; | |
133 | devnum = PCI_SLOT(pdev->devfn); | |
134 | func = PCI_FUNC(pdev->devfn); | |
135 | /* ACPI _ADR encoding for PCI bus: */ | |
439913ff | 136 | addr = (u64)(devnum << 16 | func); |
e3a59b4d HR |
137 | |
138 | DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func); | |
139 | ||
3a83f992 | 140 | dev_handle = ACPI_HANDLE(dev); |
e3a59b4d HR |
141 | if (!dev_handle) { |
142 | DEBPRINT("no acpi handle for device\n"); | |
143 | goto err; | |
144 | } | |
145 | ||
15b8dd53 | 146 | status = acpi_get_object_info(dev_handle, &dinfo); |
e3a59b4d HR |
147 | if (ACPI_FAILURE(status)) { |
148 | DEBPRINT("get_object_info for device failed\n"); | |
149 | goto err; | |
150 | } | |
e3a59b4d HR |
151 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && |
152 | dinfo->address == addr) { | |
153 | *pcidevfn = addr; | |
154 | *handle = dev_handle; | |
155 | } else { | |
156 | DEBPRINT("get_object_info for device has wrong " | |
157 | " address: %llu, should be %u\n", | |
158 | dinfo ? (unsigned long long)dinfo->address : -1ULL, | |
159 | (unsigned int)addr); | |
160 | goto err; | |
161 | } | |
162 | ||
163 | DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n", | |
164 | devnum, func, (unsigned long long)addr, *handle); | |
165 | ret = 0; | |
166 | err: | |
167 | kfree(dinfo); | |
168 | return ret; | |
169 | } | |
170 | ||
171 | /** | |
172 | * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif | |
173 | * @hwif: device to locate | |
174 | * | |
175 | * Retrieves the object handle for a given hwif. | |
176 | * | |
177 | * Returns handle on success, 0 on error. | |
178 | */ | |
179 | static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) | |
180 | { | |
181 | struct device *dev = hwif->gendev.parent; | |
1dcfdf93 | 182 | acpi_handle uninitialized_var(dev_handle); |
439913ff | 183 | u64 pcidevfn; |
e3a59b4d HR |
184 | acpi_handle chan_handle; |
185 | int err; | |
186 | ||
187 | DEBPRINT("ENTER: device %s\n", hwif->name); | |
188 | ||
189 | if (!dev) { | |
190 | DEBPRINT("no PCI device for %s\n", hwif->name); | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn); | |
195 | if (err < 0) { | |
196 | DEBPRINT("ide_get_dev_handle failed (%d)\n", err); | |
197 | return NULL; | |
198 | } | |
199 | ||
200 | /* get child objects of dev_handle == channel objects, | |
201 | * + _their_ children == drive objects */ | |
202 | /* channel is hwif->channel */ | |
203 | chan_handle = acpi_get_child(dev_handle, hwif->channel); | |
204 | DEBPRINT("chan adr=%d: handle=0x%p\n", | |
205 | hwif->channel, chan_handle); | |
206 | ||
207 | return chan_handle; | |
208 | } | |
209 | ||
e3a59b4d HR |
210 | /** |
211 | * do_drive_get_GTF - get the drive bootup default taskfile settings | |
212 | * @drive: the drive for which the taskfile settings should be retrieved | |
213 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address | |
214 | * @gtf_address: buffer containing _GTF taskfile arrays | |
215 | * | |
216 | * The _GTF method has no input parameters. | |
217 | * It returns a variable number of register set values (registers | |
218 | * hex 1F1..1F7, taskfiles). | |
219 | * The <variable number> is not known in advance, so have ACPI-CA | |
220 | * allocate the buffer as needed and return it, then free it later. | |
221 | * | |
222 | * The returned @gtf_length and @gtf_address are only valid if the | |
223 | * function return value is 0. | |
224 | */ | |
225 | static int do_drive_get_GTF(ide_drive_t *drive, | |
226 | unsigned int *gtf_length, unsigned long *gtf_address, | |
227 | unsigned long *obj_loc) | |
228 | { | |
229 | acpi_status status; | |
230 | struct acpi_buffer output; | |
231 | union acpi_object *out_obj; | |
e3a59b4d | 232 | int err = -ENODEV; |
e3a59b4d HR |
233 | |
234 | *gtf_length = 0; | |
235 | *gtf_address = 0UL; | |
236 | *obj_loc = 0UL; | |
237 | ||
e3a59b4d | 238 | if (!drive->acpidata->obj_handle) { |
8cd3c605 BZ |
239 | DEBPRINT("No ACPI object found for %s\n", drive->name); |
240 | goto out; | |
e3a59b4d HR |
241 | } |
242 | ||
243 | /* Setting up output buffer */ | |
244 | output.length = ACPI_ALLOCATE_BUFFER; | |
245 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
246 | ||
247 | /* _GTF has no input parameters */ | |
248 | err = -EIO; | |
249 | status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF", | |
250 | NULL, &output); | |
251 | if (ACPI_FAILURE(status)) { | |
252 | printk(KERN_DEBUG | |
253 | "%s: Run _GTF error: status = 0x%x\n", | |
eb63963a | 254 | __func__, status); |
e3a59b4d HR |
255 | goto out; |
256 | } | |
257 | ||
258 | if (!output.length || !output.pointer) { | |
259 | DEBPRINT("Run _GTF: " | |
260 | "length or ptr is NULL (0x%llx, 0x%p)\n", | |
261 | (unsigned long long)output.length, | |
262 | output.pointer); | |
263 | goto out; | |
264 | } | |
265 | ||
266 | out_obj = output.pointer; | |
267 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
268 | DEBPRINT("Run _GTF: error: " | |
269 | "expected object type of ACPI_TYPE_BUFFER, " | |
270 | "got 0x%x\n", out_obj->type); | |
271 | err = -ENOENT; | |
272 | kfree(output.pointer); | |
273 | goto out; | |
274 | } | |
275 | ||
276 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
277 | out_obj->buffer.length % REGS_PER_GTF) { | |
278 | printk(KERN_ERR | |
279 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", | |
eb63963a | 280 | __func__, out_obj->buffer.length, |
e3a59b4d HR |
281 | out_obj->buffer.pointer); |
282 | err = -ENOENT; | |
283 | kfree(output.pointer); | |
284 | goto out; | |
285 | } | |
286 | ||
287 | *gtf_length = out_obj->buffer.length; | |
288 | *gtf_address = (unsigned long)out_obj->buffer.pointer; | |
289 | *obj_loc = (unsigned long)out_obj; | |
290 | DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", | |
291 | *gtf_length, *gtf_address, *obj_loc); | |
292 | err = 0; | |
293 | out: | |
294 | return err; | |
295 | } | |
296 | ||
e3a59b4d HR |
297 | /** |
298 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF | |
299 | * @drive: the drive to which the taskfile command should be sent | |
300 | * @gtf_length: total number of bytes of _GTF taskfiles | |
301 | * @gtf_address: location of _GTF taskfile arrays | |
302 | * | |
303 | * Write {gtf_address, length gtf_length} in groups of | |
304 | * REGS_PER_GTF bytes. | |
305 | */ | |
306 | static int do_drive_set_taskfiles(ide_drive_t *drive, | |
307 | unsigned int gtf_length, | |
308 | unsigned long gtf_address) | |
309 | { | |
1f5892a5 | 310 | int rc = 0, err; |
e3a59b4d HR |
311 | int gtf_count = gtf_length / REGS_PER_GTF; |
312 | int ix; | |
e3a59b4d | 313 | |
e3a59b4d HR |
314 | DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", |
315 | gtf_length, gtf_length, gtf_count, gtf_address); | |
316 | ||
b0b39143 | 317 | /* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */ |
e3a59b4d | 318 | for (ix = 0; ix < gtf_count; ix++) { |
b0b39143 | 319 | u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF); |
22aa4b32 | 320 | struct ide_cmd cmd; |
b0b39143 BZ |
321 | |
322 | DEBPRINT("(0x1f1-1f7): " | |
323 | "hex: %02x %02x %02x %02x %02x %02x %02x\n", | |
324 | gtf[0], gtf[1], gtf[2], | |
325 | gtf[3], gtf[4], gtf[5], gtf[6]); | |
326 | ||
327 | if (!ide_acpigtf) { | |
328 | DEBPRINT("_GTF execution disabled\n"); | |
329 | continue; | |
330 | } | |
331 | ||
332 | /* convert GTF to taskfile */ | |
22aa4b32 | 333 | memset(&cmd, 0, sizeof(cmd)); |
745483f1 | 334 | memcpy(&cmd.tf.feature, gtf, REGS_PER_GTF); |
60f85019 SS |
335 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
336 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; | |
b0b39143 | 337 | |
22aa4b32 | 338 | err = ide_no_data_taskfile(drive, &cmd); |
b0b39143 BZ |
339 | if (err) { |
340 | printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", | |
341 | __func__, err); | |
e3a59b4d | 342 | rc = err; |
b0b39143 | 343 | } |
e3a59b4d HR |
344 | } |
345 | ||
e3a59b4d HR |
346 | return rc; |
347 | } | |
348 | ||
349 | /** | |
350 | * ide_acpi_exec_tfs - get then write drive taskfile settings | |
351 | * @drive: the drive for which the taskfile settings should be | |
352 | * written. | |
353 | * | |
354 | * According to the ACPI spec this should be called after _STM | |
355 | * has been evaluated for the interface. Some ACPI vendors interpret | |
356 | * that as a hard requirement and modify the taskfile according | |
357 | * to the Identify Drive information passed down with _STM. | |
358 | * So one should really make sure to call this only after _STM has | |
359 | * been executed. | |
360 | */ | |
361 | int ide_acpi_exec_tfs(ide_drive_t *drive) | |
362 | { | |
363 | int ret; | |
364 | unsigned int gtf_length; | |
365 | unsigned long gtf_address; | |
366 | unsigned long obj_loc; | |
367 | ||
e3a59b4d HR |
368 | DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); |
369 | ||
370 | ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); | |
371 | if (ret < 0) { | |
372 | DEBPRINT("get_GTF error (%d)\n", ret); | |
373 | return ret; | |
374 | } | |
375 | ||
376 | DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); | |
377 | ||
378 | ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); | |
379 | kfree((void *)obj_loc); | |
380 | if (ret < 0) { | |
381 | DEBPRINT("set_taskfiles error (%d)\n", ret); | |
382 | } | |
383 | ||
384 | DEBPRINT("ret=%d\n", ret); | |
385 | ||
386 | return ret; | |
387 | } | |
e3a59b4d HR |
388 | |
389 | /** | |
390 | * ide_acpi_get_timing - get the channel (controller) timings | |
391 | * @hwif: target IDE interface (channel) | |
392 | * | |
393 | * This function executes the _GTM ACPI method for the target channel. | |
394 | * | |
395 | */ | |
396 | void ide_acpi_get_timing(ide_hwif_t *hwif) | |
397 | { | |
398 | acpi_status status; | |
399 | struct acpi_buffer output; | |
400 | union acpi_object *out_obj; | |
401 | ||
e3a59b4d HR |
402 | /* Setting up output buffer for _GTM */ |
403 | output.length = ACPI_ALLOCATE_BUFFER; | |
404 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
405 | ||
406 | /* _GTM has no input parameters */ | |
407 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", | |
408 | NULL, &output); | |
409 | ||
410 | DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", | |
411 | status, output.pointer, | |
412 | (unsigned long long)output.length); | |
413 | ||
414 | if (ACPI_FAILURE(status)) { | |
415 | DEBPRINT("Run _GTM error: status = 0x%x\n", status); | |
416 | return; | |
417 | } | |
418 | ||
419 | if (!output.length || !output.pointer) { | |
420 | DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", | |
421 | (unsigned long long)output.length, | |
422 | output.pointer); | |
423 | kfree(output.pointer); | |
424 | return; | |
425 | } | |
426 | ||
427 | out_obj = output.pointer; | |
428 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
e3a59b4d HR |
429 | DEBPRINT("Run _GTM: error: " |
430 | "expected object type of ACPI_TYPE_BUFFER, " | |
431 | "got 0x%x\n", out_obj->type); | |
ba578732 | 432 | kfree(output.pointer); |
e3a59b4d HR |
433 | return; |
434 | } | |
435 | ||
436 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
437 | out_obj->buffer.length != sizeof(struct GTM_buffer)) { | |
e3a59b4d | 438 | printk(KERN_ERR |
1e8f34f7 AM |
439 | "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " |
440 | "addr (0x%p)\n", | |
eb63963a | 441 | __func__, out_obj->buffer.length, |
1e8f34f7 | 442 | sizeof(struct GTM_buffer), out_obj->buffer.pointer); |
ba578732 | 443 | kfree(output.pointer); |
e3a59b4d HR |
444 | return; |
445 | } | |
446 | ||
447 | memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, | |
448 | sizeof(struct GTM_buffer)); | |
449 | ||
450 | DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n", | |
451 | out_obj->buffer.pointer, out_obj->buffer.length, | |
452 | sizeof(struct GTM_buffer)); | |
453 | ||
454 | DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", | |
455 | hwif->acpidata->gtm.PIO_speed0, | |
456 | hwif->acpidata->gtm.DMA_speed0, | |
457 | hwif->acpidata->gtm.PIO_speed1, | |
458 | hwif->acpidata->gtm.DMA_speed1, | |
459 | hwif->acpidata->gtm.GTM_flags); | |
460 | ||
461 | kfree(output.pointer); | |
462 | } | |
e3a59b4d HR |
463 | |
464 | /** | |
465 | * ide_acpi_push_timing - set the channel (controller) timings | |
466 | * @hwif: target IDE interface (channel) | |
467 | * | |
468 | * This function executes the _STM ACPI method for the target channel. | |
469 | * | |
470 | * _STM requires Identify Drive data, which has to passed as an argument. | |
4dde4492 | 471 | * Unfortunately drive->id is a mangled version which we can't readily |
e3a59b4d HR |
472 | * use; hence we'll get the information afresh. |
473 | */ | |
474 | void ide_acpi_push_timing(ide_hwif_t *hwif) | |
475 | { | |
476 | acpi_status status; | |
477 | struct acpi_object_list input; | |
478 | union acpi_object in_params[3]; | |
479 | struct ide_acpi_drive_link *master = &hwif->acpidata->master; | |
480 | struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; | |
481 | ||
e3a59b4d HR |
482 | /* Give the GTM buffer + drive Identify data to the channel via the |
483 | * _STM method: */ | |
484 | /* setup input parameters buffer for _STM */ | |
485 | input.count = 3; | |
486 | input.pointer = in_params; | |
487 | in_params[0].type = ACPI_TYPE_BUFFER; | |
488 | in_params[0].buffer.length = sizeof(struct GTM_buffer); | |
489 | in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; | |
490 | in_params[1].type = ACPI_TYPE_BUFFER; | |
0e63a588 | 491 | in_params[1].buffer.length = ATA_ID_WORDS * 2; |
e3a59b4d HR |
492 | in_params[1].buffer.pointer = (u8 *)&master->idbuff; |
493 | in_params[2].type = ACPI_TYPE_BUFFER; | |
0e63a588 | 494 | in_params[2].buffer.length = ATA_ID_WORDS * 2; |
e3a59b4d HR |
495 | in_params[2].buffer.pointer = (u8 *)&slave->idbuff; |
496 | /* Output buffer: _STM has no output */ | |
497 | ||
498 | status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", | |
499 | &input, NULL); | |
500 | ||
501 | if (ACPI_FAILURE(status)) { | |
502 | DEBPRINT("Run _STM error: status = 0x%x\n", status); | |
503 | } | |
504 | DEBPRINT("_STM status: %d\n", status); | |
505 | } | |
e3a59b4d | 506 | |
5e32132b SL |
507 | /** |
508 | * ide_acpi_set_state - set the channel power state | |
509 | * @hwif: target IDE interface | |
510 | * @on: state, on/off | |
511 | * | |
512 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
513 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
514 | */ | |
515 | void ide_acpi_set_state(ide_hwif_t *hwif, int on) | |
516 | { | |
2bd24a1c BZ |
517 | ide_drive_t *drive; |
518 | int i; | |
5e32132b | 519 | |
2bf427b2 | 520 | if (ide_noacpi_psx) |
5e32132b SL |
521 | return; |
522 | ||
523 | DEBPRINT("ENTER:\n"); | |
524 | ||
5e32132b SL |
525 | /* channel first and then drives for power on and verse versa for power off */ |
526 | if (on) | |
527 | acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); | |
5e32132b | 528 | |
7ed5b157 BZ |
529 | ide_port_for_each_present_dev(i, drive, hwif) { |
530 | if (drive->acpidata->obj_handle) | |
5e32132b | 531 | acpi_bus_set_power(drive->acpidata->obj_handle, |
8ad928d5 | 532 | on ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD); |
5e32132b | 533 | } |
7ed5b157 | 534 | |
5e32132b | 535 | if (!on) |
8ad928d5 RW |
536 | acpi_bus_set_power(hwif->acpidata->obj_handle, |
537 | ACPI_STATE_D3_COLD); | |
5e32132b | 538 | } |
5e32132b | 539 | |
e3a59b4d | 540 | /** |
8b803bd1 | 541 | * ide_acpi_init_port - initialize the ACPI link for an IDE interface |
e3a59b4d HR |
542 | * @hwif: target IDE interface (channel) |
543 | * | |
544 | * The ACPI spec is not quite clear when the drive identify buffer | |
545 | * should be obtained. Calling IDENTIFY DEVICE during shutdown | |
546 | * is not the best of ideas as the drive might already being put to | |
547 | * sleep. And obviously we can't call it during resume. | |
548 | * So we get the information during startup; but this means that | |
549 | * any changes during run-time will be lost after resume. | |
550 | */ | |
8b803bd1 | 551 | void ide_acpi_init_port(ide_hwif_t *hwif) |
e3a59b4d | 552 | { |
e3a59b4d HR |
553 | hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); |
554 | if (!hwif->acpidata) | |
555 | return; | |
556 | ||
557 | hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); | |
558 | if (!hwif->acpidata->obj_handle) { | |
559 | DEBPRINT("no ACPI object for %s found\n", hwif->name); | |
560 | kfree(hwif->acpidata); | |
561 | hwif->acpidata = NULL; | |
e3a59b4d | 562 | } |
eafd88a3 BZ |
563 | } |
564 | ||
565 | void ide_acpi_port_init_devices(ide_hwif_t *hwif) | |
566 | { | |
567 | ide_drive_t *drive; | |
568 | int i, err; | |
569 | ||
570 | if (hwif->acpidata == NULL) | |
571 | return; | |
e3a59b4d HR |
572 | |
573 | /* | |
574 | * The ACPI spec mandates that we send information | |
575 | * for both drives, regardless whether they are connected | |
576 | * or not. | |
577 | */ | |
5e7f3a46 BZ |
578 | hwif->devices[0]->acpidata = &hwif->acpidata->master; |
579 | hwif->devices[1]->acpidata = &hwif->acpidata->slave; | |
e3a59b4d | 580 | |
8cd3c605 | 581 | /* get _ADR info for each device */ |
7ed5b157 | 582 | ide_port_for_each_present_dev(i, drive, hwif) { |
8cd3c605 BZ |
583 | acpi_handle dev_handle; |
584 | ||
8cd3c605 BZ |
585 | DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", |
586 | drive->name, hwif->channel, drive->dn & 1); | |
587 | ||
588 | /* TBD: could also check ACPI object VALID bits */ | |
589 | dev_handle = acpi_get_child(hwif->acpidata->obj_handle, | |
590 | drive->dn & 1); | |
591 | ||
592 | DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle); | |
593 | ||
594 | drive->acpidata->obj_handle = dev_handle; | |
595 | } | |
596 | ||
7ed5b157 BZ |
597 | /* send IDENTIFY for each device */ |
598 | ide_port_for_each_present_dev(i, drive, hwif) { | |
eafd88a3 BZ |
599 | err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff); |
600 | if (err) | |
e3a59b4d | 601 | DEBPRINT("identify device %s failed (%d)\n", |
eafd88a3 | 602 | drive->name, err); |
e3a59b4d HR |
603 | } |
604 | ||
2bf427b2 | 605 | if (ide_noacpi || ide_acpionboot == 0) { |
e3a59b4d HR |
606 | DEBPRINT("ACPI methods disabled on boot\n"); |
607 | return; | |
608 | } | |
609 | ||
5e32132b SL |
610 | /* ACPI _PS0 before _STM */ |
611 | ide_acpi_set_state(hwif, 1); | |
e3a59b4d HR |
612 | /* |
613 | * ACPI requires us to call _STM on startup | |
614 | */ | |
615 | ide_acpi_get_timing(hwif); | |
616 | ide_acpi_push_timing(hwif); | |
617 | ||
7ed5b157 BZ |
618 | ide_port_for_each_present_dev(i, drive, hwif) { |
619 | ide_acpi_exec_tfs(drive); | |
e3a59b4d HR |
620 | } |
621 | } |