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