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ALSA: hda - Enable widget power saving for Cirrus codecs
[deliverable/linux.git] / sound / hda / hdac_device.c
CommitLineData
7639a06c
TI		 1/*
2 * HD-audio codec core device
3 */
4
5#include <linux/init.h>
6#include <linux/device.h>
7#include <linux/slab.h>
8#include <linux/module.h>
9#include <linux/export.h>
10#include <linux/pm_runtime.h>
11#include <sound/hdaudio.h>
01ed3c06 12#include <sound/hda_regmap.h>
b7d023e1 13#include <sound/pcm.h>
7639a06c
TI		 14#include "local.h"
15
16static void setup_fg_nodes(struct hdac_device *codec);
17static int get_codec_vendor_name(struct hdac_device *codec);
18
19static void default_release(struct device *dev)
20{
21 snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
22}
23
24/**
25 * snd_hdac_device_init - initialize the HD-audio codec base device
26 * @codec: device to initialize
27 * @bus: but to attach
28 * @name: device name string
29 * @addr: codec address
30 *
31 * Returns zero for success or a negative error code.
32 *
33 * This function increments the runtime PM counter and marks it active.
34 * The caller needs to turn it off appropriately later.
35 *
36 * The caller needs to set the device's release op properly by itself.
37 */
38int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
39 const char *name, unsigned int addr)
40{
41 struct device *dev;
42 hda_nid_t fg;
43 int err;
44
45 dev = &codec->dev;
46 device_initialize(dev);
47 dev->parent = bus->dev;
48 dev->bus = &snd_hda_bus_type;
49 dev->release = default_release;
3256be65 50 dev->groups = hdac_dev_attr_groups;
7639a06c
TI		 51 dev_set_name(dev, "%s", name);
52 device_enable_async_suspend(dev);
53
54 codec->bus = bus;
55 codec->addr = addr;
56 codec->type = HDA_DEV_CORE;
57 pm_runtime_set_active(&codec->dev);
58 pm_runtime_get_noresume(&codec->dev);
59 atomic_set(&codec->in_pm, 0);
60
61 err = snd_hdac_bus_add_device(bus, codec);
62 if (err < 0)
63 goto error;
64
65 /* fill parameters */
66 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
67 AC_PAR_VENDOR_ID);
68 if (codec->vendor_id == -1) {
69 /* read again, hopefully the access method was corrected
70 * in the last read...
71 */
72 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
73 AC_PAR_VENDOR_ID);
74 }
75
76 codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
77 AC_PAR_SUBSYSTEM_ID);
78 codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
79 AC_PAR_REV_ID);
80
81 setup_fg_nodes(codec);
82 if (!codec->afg && !codec->mfg) {
83 dev_err(dev, "no AFG or MFG node found\n");
84 err = -ENODEV;
85 goto error;
86 }
87
88 fg = codec->afg ? codec->afg : codec->mfg;
89
90 err = snd_hdac_refresh_widgets(codec);
91 if (err < 0)
92 goto error;
93
94 codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
95 /* reread ssid if not set by parameter */
ffda568e 96 if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
7639a06c
TI		 97 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
98 &codec->subsystem_id);
99
100 err = get_codec_vendor_name(codec);
101 if (err < 0)
102 goto error;
103
104 codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
105 codec->vendor_id & 0xffff);
106 if (!codec->chip_name) {
107 err = -ENOMEM;
108 goto error;
109 }
110
111 return 0;
112
113 error:
7639a06c
TI		 114 put_device(&codec->dev);
115 return err;
116}
117EXPORT_SYMBOL_GPL(snd_hdac_device_init);
118
119/**
120 * snd_hdac_device_exit - clean up the HD-audio codec base device
121 * @codec: device to clean up
122 */
123void snd_hdac_device_exit(struct hdac_device *codec)
124{
c4c2533f 125 pm_runtime_put_noidle(&codec->dev);
7639a06c
TI		 126 snd_hdac_bus_remove_device(codec->bus, codec);
127 kfree(codec->vendor_name);
128 kfree(codec->chip_name);
129}
130EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
131
3256be65
TI		 132/**
133 * snd_hdac_device_register - register the hd-audio codec base device
134 * codec: the device to register
135 */
136int snd_hdac_device_register(struct hdac_device *codec)
137{
138 int err;
139
140 err = device_add(&codec->dev);
141 if (err < 0)
142 return err;
143 err = hda_widget_sysfs_init(codec);
144 if (err < 0) {
145 device_del(&codec->dev);
146 return err;
147 }
148
149 return 0;
150}
151EXPORT_SYMBOL_GPL(snd_hdac_device_register);
152
153/**
154 * snd_hdac_device_unregister - unregister the hd-audio codec base device
155 * codec: the device to unregister
156 */
157void snd_hdac_device_unregister(struct hdac_device *codec)
158{
159 if (device_is_registered(&codec->dev)) {
160 hda_widget_sysfs_exit(codec);
161 device_del(&codec->dev);
162 }
163}
164EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
165
7639a06c
TI		 166/**
167 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
168 * HD-audio controller
169 * @codec: the codec object
170 * @nid: NID to encode
171 * @verb: verb to encode
172 * @parm: parameter to encode
173 *
174 * Return an encoded command verb or -1 for error.
175 */
176unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
177 unsigned int verb, unsigned int parm)
178{
179 u32 val, addr;
180
181 addr = codec->addr;
182 if ((addr & ~0xf) || (nid & ~0x7f) ||
183 (verb & ~0xfff) || (parm & ~0xffff)) {
184 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
185 addr, nid, verb, parm);
186 return -1;
187 }
188
189 val = addr << 28;
190 val |= (u32)nid << 20;
191 val |= verb << 8;
192 val |= parm;
193 return val;
194}
195EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
196
05852448
TI		 197/**
198 * snd_hdac_exec_verb - execute an encoded verb
199 * @codec: the codec object
200 * @cmd: encoded verb to execute
201 * @flags: optional flags, pass zero for default
202 * @res: the pointer to store the result, NULL if running async
203 *
204 * Returns zero if successful, or a negative error code.
205 *
206 * This calls the exec_verb op when set in hdac_codec. If not,
207 * call the default snd_hdac_bus_exec_verb().
208 */
209int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
210 unsigned int flags, unsigned int *res)
211{
212 if (codec->exec_verb)
213 return codec->exec_verb(codec, cmd, flags, res);
214 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
215}
216EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
217
218
7639a06c
TI		 219/**
220 * snd_hdac_read - execute a verb
221 * @codec: the codec object
222 * @nid: NID to execute a verb
223 * @verb: verb to execute
224 * @parm: parameter for a verb
225 * @res: the pointer to store the result, NULL if running async
226 *
227 * Returns zero if successful, or a negative error code.
228 */
229int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
230 unsigned int verb, unsigned int parm, unsigned int *res)
231{
232 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
233
05852448 234 return snd_hdac_exec_verb(codec, cmd, 0, res);
7639a06c
TI		 235}
236EXPORT_SYMBOL_GPL(snd_hdac_read);
237
238/**
01ed3c06 239 * _snd_hdac_read_parm - read a parmeter
7639a06c 240 *
01ed3c06 241 * This function returns zero or an error unlike snd_hdac_read_parm().
7639a06c 242 */
01ed3c06
TI		 243int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
244 unsigned int *res)
7639a06c 245{
01ed3c06 246 unsigned int cmd;
7639a06c 247
01ed3c06
TI		 248 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
249 return snd_hdac_regmap_read_raw(codec, cmd, res);
7639a06c 250}
01ed3c06 251EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
7639a06c 252
9ba17b4d
TI		 253/**
254 * snd_hdac_read_parm_uncached - read a codec parameter without caching
7639a06c
TI		 255 * @codec: the codec object
256 * @nid: NID to read a parameter
257 * @parm: parameter to read
258 *
259 * Returns -1 for error. If you need to distinguish the error more
260 * strictly, use snd_hdac_read() directly.
261 */
9ba17b4d
TI		 262int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
263 int parm)
7639a06c
TI		 264{
265 int val;
266
9ba17b4d
TI		 267 if (codec->regmap)
268 regcache_cache_bypass(codec->regmap, true);
269 val = snd_hdac_read_parm(codec, nid, parm);
270 if (codec->regmap)
271 regcache_cache_bypass(codec->regmap, false);
7639a06c
TI		 272 return val;
273}
9ba17b4d
TI		 274EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
275
faa75f8a
TI		 276/**
277 * snd_hdac_override_parm - override read-only parameters
278 * @codec: the codec object
279 * @nid: NID for the parameter
280 * @parm: the parameter to change
281 * @val: the parameter value to overwrite
282 */
283int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
284 unsigned int parm, unsigned int val)
285{
286 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
287 int err;
288
289 if (!codec->regmap)
290 return -EINVAL;
291
292 codec->caps_overwriting = true;
293 err = snd_hdac_regmap_write_raw(codec, verb, val);
294 codec->caps_overwriting = false;
295 return err;
296}
297EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
7639a06c
TI		 298
299/**
300 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
301 * @codec: the codec object
302 * @nid: NID to inspect
303 * @start_id: the pointer to store the starting NID
304 *
305 * Returns the number of subtree nodes or zero if not found.
9ba17b4d 306 * This function reads parameters always without caching.
7639a06c
TI		 307 */
308int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
309 hda_nid_t *start_id)
310{
311 unsigned int parm;
312
9ba17b4d 313 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
7639a06c
TI		 314 if (parm == -1) {
315 *start_id = 0;
316 return 0;
317 }
318 *start_id = (parm >> 16) & 0x7fff;
319 return (int)(parm & 0x7fff);
320}
321EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
322
323/*
324 * look for an AFG and MFG nodes
325 */
326static void setup_fg_nodes(struct hdac_device *codec)
327{
328 int i, total_nodes, function_id;
329 hda_nid_t nid;
330
331 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
332 for (i = 0; i < total_nodes; i++, nid++) {
333 function_id = snd_hdac_read_parm(codec, nid,
334 AC_PAR_FUNCTION_TYPE);
335 switch (function_id & 0xff) {
336 case AC_GRP_AUDIO_FUNCTION:
337 codec->afg = nid;
338 codec->afg_function_id = function_id & 0xff;
339 codec->afg_unsol = (function_id >> 8) & 1;
340 break;
341 case AC_GRP_MODEM_FUNCTION:
342 codec->mfg = nid;
343 codec->mfg_function_id = function_id & 0xff;
344 codec->mfg_unsol = (function_id >> 8) & 1;
345 break;
346 default:
347 break;
348 }
349 }
350}
351
352/**
353 * snd_hdac_refresh_widgets - Reset the widget start/end nodes
354 * @codec: the codec object
355 */
356int snd_hdac_refresh_widgets(struct hdac_device *codec)
357{
358 hda_nid_t start_nid;
359 int nums;
360
361 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
362 if (!start_nid || nums <= 0 || nums >= 0xff) {
363 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
364 codec->afg);
365 return -EINVAL;
366 }
367
368 codec->num_nodes = nums;
369 codec->start_nid = start_nid;
370 codec->end_nid = start_nid + nums;
371 return 0;
372}
373EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
374
18dfd79d
VK		 375/**
376 * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the
377 * codec sysfs
378 * @codec: the codec object
379 *
380 * first we need to remove sysfs, then refresh widgets and lastly
381 * recreate it
382 */
383int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec)
384{
385 int ret;
386
a92d5ee8
TI		 387 if (device_is_registered(&codec->dev))
388 hda_widget_sysfs_exit(codec);
18dfd79d
VK		 389 ret = snd_hdac_refresh_widgets(codec);
390 if (ret) {
391 dev_err(&codec->dev, "failed to refresh widget: %d\n", ret);
392 return ret;
393 }
a92d5ee8
TI		 394 if (device_is_registered(&codec->dev)) {
395 ret = hda_widget_sysfs_init(codec);
396 if (ret) {
397 dev_err(&codec->dev, "failed to init sysfs: %d\n", ret);
398 return ret;
399 }
18dfd79d 400 }
18dfd79d
VK		 401 return ret;
402}
403EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs);
404
7639a06c
TI		 405/* return CONNLIST_LEN parameter of the given widget */
406static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
407{
408 unsigned int wcaps = get_wcaps(codec, nid);
409 unsigned int parm;
410
411 if (!(wcaps & AC_WCAP_CONN_LIST) &&
412 get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
413 return 0;
414
415 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
416 if (parm == -1)
417 parm = 0;
418 return parm;
419}
420
421/**
422 * snd_hdac_get_connections - get a widget connection list
423 * @codec: the codec object
424 * @nid: NID
425 * @conn_list: the array to store the results, can be NULL
426 * @max_conns: the max size of the given array
427 *
428 * Returns the number of connected widgets, zero for no connection, or a
429 * negative error code. When the number of elements don't fit with the
430 * given array size, it returns -ENOSPC.
431 *
432 * When @conn_list is NULL, it just checks the number of connections.
433 */
434int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
435 hda_nid_t *conn_list, int max_conns)
436{
437 unsigned int parm;
438 int i, conn_len, conns, err;
439 unsigned int shift, num_elems, mask;
440 hda_nid_t prev_nid;
441 int null_count = 0;
442
443 parm = get_num_conns(codec, nid);
444 if (!parm)
445 return 0;
446
447 if (parm & AC_CLIST_LONG) {
448 /* long form */
449 shift = 16;
450 num_elems = 2;
451 } else {
452 /* short form */
453 shift = 8;
454 num_elems = 4;
455 }
456 conn_len = parm & AC_CLIST_LENGTH;
457 mask = (1 << (shift-1)) - 1;
458
459 if (!conn_len)
460 return 0; /* no connection */
461
462 if (conn_len == 1) {
463 /* single connection */
464 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
465 &parm);
466 if (err < 0)
467 return err;
468 if (conn_list)
469 conn_list[0] = parm & mask;
470 return 1;
471 }
472
473 /* multi connection */
474 conns = 0;
475 prev_nid = 0;
476 for (i = 0; i < conn_len; i++) {
477 int range_val;
478 hda_nid_t val, n;
479
480 if (i % num_elems == 0) {
481 err = snd_hdac_read(codec, nid,
482 AC_VERB_GET_CONNECT_LIST, i,
483 &parm);
484 if (err < 0)
485 return -EIO;
486 }
487 range_val = !!(parm & (1 << (shift-1))); /* ranges */
488 val = parm & mask;
489 if (val == 0 && null_count++) { /* no second chance */
490 dev_dbg(&codec->dev,
491 "invalid CONNECT_LIST verb %x[%i]:%x\n",
492 nid, i, parm);
493 return 0;
494 }
495 parm >>= shift;
496 if (range_val) {
497 /* ranges between the previous and this one */
498 if (!prev_nid || prev_nid >= val) {
499 dev_warn(&codec->dev,
500 "invalid dep_range_val %x:%x\n",
501 prev_nid, val);
502 continue;
503 }
504 for (n = prev_nid + 1; n <= val; n++) {
505 if (conn_list) {
506 if (conns >= max_conns)
507 return -ENOSPC;
508 conn_list[conns] = n;
509 }
510 conns++;
511 }
512 } else {
513 if (conn_list) {
514 if (conns >= max_conns)
515 return -ENOSPC;
516 conn_list[conns] = val;
517 }
518 conns++;
519 }
520 prev_nid = val;
521 }
522 return conns;
523}
524EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
525
526#ifdef CONFIG_PM
527/**
664c7155 528 * snd_hdac_power_up - power up the codec
7639a06c 529 * @codec: the codec object
664c7155
TI		 530 *
531 * This function calls the runtime PM helper to power up the given codec.
532 * Unlike snd_hdac_power_up_pm(), you should call this only for the code
533 * path that isn't included in PM path. Otherwise it gets stuck.
fbce23a0
TI		 534 *
535 * Returns zero if successful, or a negative error code.
7639a06c 536 */
fbce23a0 537int snd_hdac_power_up(struct hdac_device *codec)
7639a06c 538{
fbce23a0 539 return pm_runtime_get_sync(&codec->dev);
7639a06c
TI		 540}
541EXPORT_SYMBOL_GPL(snd_hdac_power_up);
542
543/**
664c7155 544 * snd_hdac_power_down - power down the codec
7639a06c 545 * @codec: the codec object
fbce23a0
TI		 546 *
547 * Returns zero if successful, or a negative error code.
7639a06c 548 */
fbce23a0 549int snd_hdac_power_down(struct hdac_device *codec)
7639a06c
TI		 550{
551 struct device *dev = &codec->dev;
552
7639a06c 553 pm_runtime_mark_last_busy(dev);
fbce23a0 554 return pm_runtime_put_autosuspend(dev);
7639a06c
TI		 555}
556EXPORT_SYMBOL_GPL(snd_hdac_power_down);
c3aeda62
TI		 557
558/**
559 * snd_hdac_power_up_pm - power up the codec
560 * @codec: the codec object
561 *
562 * This function can be called in a recursive code path like init code
563 * which may be called by PM suspend/resume again. OTOH, if a power-up
564 * call must wake up the sleeper (e.g. in a kctl callback), use
565 * snd_hdac_power_up() instead.
fbce23a0
TI		 566 *
567 * Returns zero if successful, or a negative error code.
c3aeda62 568 */
fbce23a0 569int snd_hdac_power_up_pm(struct hdac_device *codec)
c3aeda62
TI		 570{
571 if (!atomic_inc_not_zero(&codec->in_pm))
fbce23a0
TI		 572 return snd_hdac_power_up(codec);
573 return 0;
c3aeda62
TI		 574}
575EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
576
577/**
578 * snd_hdac_power_down_pm - power down the codec
579 * @codec: the codec object
580 *
581 * Like snd_hdac_power_up_pm(), this function is used in a recursive
582 * code path like init code which may be called by PM suspend/resume again.
fbce23a0
TI		 583 *
584 * Returns zero if successful, or a negative error code.
c3aeda62 585 */
fbce23a0 586int snd_hdac_power_down_pm(struct hdac_device *codec)
c3aeda62
TI		 587{
588 if (atomic_dec_if_positive(&codec->in_pm) < 0)
fbce23a0
TI		 589 return snd_hdac_power_down(codec);
590 return 0;
c3aeda62
TI		 591}
592EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
7639a06c
TI		 593#endif
594
a5e7e07c
ML		 595/*
596 * Enable/disable the link power for a codec.
597 */
598int snd_hdac_link_power(struct hdac_device *codec, bool enable)
599{
600 if (!codec->link_power_control)
601 return 0;
602
603 if (codec->bus->ops->link_power)
604 return codec->bus->ops->link_power(codec->bus, enable);
605 else
606 return -EINVAL;
607}
608EXPORT_SYMBOL_GPL(snd_hdac_link_power);
609
7639a06c
TI		 610/* codec vendor labels */
611struct hda_vendor_id {
612 unsigned int id;
613 const char *name;
614};
615
616static struct hda_vendor_id hda_vendor_ids[] = {
617 { 0x1002, "ATI" },
618 { 0x1013, "Cirrus Logic" },
619 { 0x1057, "Motorola" },
620 { 0x1095, "Silicon Image" },
621 { 0x10de, "Nvidia" },
622 { 0x10ec, "Realtek" },
623 { 0x1102, "Creative" },
624 { 0x1106, "VIA" },
625 { 0x111d, "IDT" },
626 { 0x11c1, "LSI" },
627 { 0x11d4, "Analog Devices" },
628 { 0x13f6, "C-Media" },
629 { 0x14f1, "Conexant" },
630 { 0x17e8, "Chrontel" },
631 { 0x1854, "LG" },
632 { 0x1aec, "Wolfson Microelectronics" },
633 { 0x1af4, "QEMU" },
634 { 0x434d, "C-Media" },
635 { 0x8086, "Intel" },
636 { 0x8384, "SigmaTel" },
637 {} /* terminator */
638};
639
640/* store the codec vendor name */
641static int get_codec_vendor_name(struct hdac_device *codec)
642{
643 const struct hda_vendor_id *c;
644 u16 vendor_id = codec->vendor_id >> 16;
645
646 for (c = hda_vendor_ids; c->id; c++) {
647 if (c->id == vendor_id) {
648 codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
649 return codec->vendor_name ? 0 : -ENOMEM;
650 }
651 }
652
653 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
654 return codec->vendor_name ? 0 : -ENOMEM;
655}
b7d023e1
TI		 656
657/*
658 * stream formats
659 */
660struct hda_rate_tbl {
661 unsigned int hz;
662 unsigned int alsa_bits;
663 unsigned int hda_fmt;
664};
665
666/* rate = base * mult / div */
667#define HDA_RATE(base, mult, div) \
668 (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
669 (((div) - 1) << AC_FMT_DIV_SHIFT))
670
671static struct hda_rate_tbl rate_bits[] = {
672 /* rate in Hz, ALSA rate bitmask, HDA format value */
673
674 /* autodetected value used in snd_hda_query_supported_pcm */
675 { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
676 { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
677 { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
678 { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
679 { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
680 { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
681 { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
682 { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
683 { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
684 { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
685 { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
686#define AC_PAR_PCM_RATE_BITS 11
687 /* up to bits 10, 384kHZ isn't supported properly */
688
689 /* not autodetected value */
690 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
691
692 { 0 } /* terminator */
693};
694
695/**
696 * snd_hdac_calc_stream_format - calculate the format bitset
697 * @rate: the sample rate
698 * @channels: the number of channels
699 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
700 * @maxbps: the max. bps
701 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
702 *
703 * Calculate the format bitset from the given rate, channels and th PCM format.
704 *
705 * Return zero if invalid.
706 */
707unsigned int snd_hdac_calc_stream_format(unsigned int rate,
708 unsigned int channels,
709 unsigned int format,
710 unsigned int maxbps,
711 unsigned short spdif_ctls)
712{
713 int i;
714 unsigned int val = 0;
715
716 for (i = 0; rate_bits[i].hz; i++)
717 if (rate_bits[i].hz == rate) {
718 val = rate_bits[i].hda_fmt;
719 break;
720 }
721 if (!rate_bits[i].hz)
722 return 0;
723
724 if (channels == 0 || channels > 8)
725 return 0;
726 val |= channels - 1;
727
728 switch (snd_pcm_format_width(format)) {
729 case 8:
730 val |= AC_FMT_BITS_8;
731 break;
732 case 16:
733 val |= AC_FMT_BITS_16;
734 break;
735 case 20:
736 case 24:
737 case 32:
738 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
739 val |= AC_FMT_BITS_32;
740 else if (maxbps >= 24)
741 val |= AC_FMT_BITS_24;
742 else
743 val |= AC_FMT_BITS_20;
744 break;
745 default:
746 return 0;
747 }
748
749 if (spdif_ctls & AC_DIG1_NONAUDIO)
750 val |= AC_FMT_TYPE_NON_PCM;
751
752 return val;
753}
754EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
755
756static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
757{
758 unsigned int val = 0;
759
760 if (nid != codec->afg &&
761 (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
762 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
763 if (!val || val == -1)
764 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
765 if (!val || val == -1)
766 return 0;
767 return val;
768}
769
770static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
771{
772 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
773
774 if (!streams || streams == -1)
775 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
776 if (!streams || streams == -1)
777 return 0;
778 return streams;
779}
780
781/**
782 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
783 * @codec: the codec object
784 * @nid: NID to query
785 * @ratesp: the pointer to store the detected rate bitflags
786 * @formatsp: the pointer to store the detected formats
787 * @bpsp: the pointer to store the detected format widths
788 *
789 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp
790 * or @bsps argument is ignored.
791 *
792 * Returns 0 if successful, otherwise a negative error code.
793 */
794int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
795 u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
796{
797 unsigned int i, val, wcaps;
798
799 wcaps = get_wcaps(codec, nid);
800 val = query_pcm_param(codec, nid);
801
802 if (ratesp) {
803 u32 rates = 0;
804 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
805 if (val & (1 << i))
806 rates |= rate_bits[i].alsa_bits;
807 }
808 if (rates == 0) {
809 dev_err(&codec->dev,
810 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
811 nid, val,
812 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
813 return -EIO;
814 }
815 *ratesp = rates;
816 }
817
818 if (formatsp || bpsp) {
819 u64 formats = 0;
820 unsigned int streams, bps;
821
822 streams = query_stream_param(codec, nid);
823 if (!streams)
824 return -EIO;
825
826 bps = 0;
827 if (streams & AC_SUPFMT_PCM) {
828 if (val & AC_SUPPCM_BITS_8) {
829 formats |= SNDRV_PCM_FMTBIT_U8;
830 bps = 8;
831 }
832 if (val & AC_SUPPCM_BITS_16) {
833 formats |= SNDRV_PCM_FMTBIT_S16_LE;
834 bps = 16;
835 }
836 if (wcaps & AC_WCAP_DIGITAL) {
837 if (val & AC_SUPPCM_BITS_32)
838 formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
839 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
840 formats |= SNDRV_PCM_FMTBIT_S32_LE;
841 if (val & AC_SUPPCM_BITS_24)
842 bps = 24;
843 else if (val & AC_SUPPCM_BITS_20)
844 bps = 20;
845 } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
846 AC_SUPPCM_BITS_32)) {
847 formats |= SNDRV_PCM_FMTBIT_S32_LE;
848 if (val & AC_SUPPCM_BITS_32)
849 bps = 32;
850 else if (val & AC_SUPPCM_BITS_24)
851 bps = 24;
852 else if (val & AC_SUPPCM_BITS_20)
853 bps = 20;
854 }
855 }
856#if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
857 if (streams & AC_SUPFMT_FLOAT32) {
858 formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
859 if (!bps)
860 bps = 32;
861 }
862#endif
863 if (streams == AC_SUPFMT_AC3) {
864 /* should be exclusive */
865 /* temporary hack: we have still no proper support
866 * for the direct AC3 stream...
867 */
868 formats |= SNDRV_PCM_FMTBIT_U8;
869 bps = 8;
870 }
871 if (formats == 0) {
872 dev_err(&codec->dev,
873 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
874 nid, val,
875 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
876 streams);
877 return -EIO;
878 }
879 if (formatsp)
880 *formatsp = formats;
881 if (bpsp)
882 *bpsp = bps;
883 }
884
885 return 0;
886}
887EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
888
889/**
890 * snd_hdac_is_supported_format - Check the validity of the format
891 * @codec: the codec object
892 * @nid: NID to check
893 * @format: the HD-audio format value to check
894 *
895 * Check whether the given node supports the format value.
896 *
897 * Returns true if supported, false if not.
898 */
899bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
900 unsigned int format)
901{
902 int i;
903 unsigned int val = 0, rate, stream;
904
905 val = query_pcm_param(codec, nid);
906 if (!val)
907 return false;
908
909 rate = format & 0xff00;
910 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
911 if (rate_bits[i].hda_fmt == rate) {
912 if (val & (1 << i))
913 break;
914 return false;
915 }
916 if (i >= AC_PAR_PCM_RATE_BITS)
917 return false;
918
919 stream = query_stream_param(codec, nid);
920 if (!stream)
921 return false;
922
923 if (stream & AC_SUPFMT_PCM) {
924 switch (format & 0xf0) {
925 case 0x00:
926 if (!(val & AC_SUPPCM_BITS_8))
927 return false;
928 break;
929 case 0x10:
930 if (!(val & AC_SUPPCM_BITS_16))
931 return false;
932 break;
933 case 0x20:
934 if (!(val & AC_SUPPCM_BITS_20))
935 return false;
936 break;
937 case 0x30:
938 if (!(val & AC_SUPPCM_BITS_24))
939 return false;
940 break;
941 case 0x40:
942 if (!(val & AC_SUPPCM_BITS_32))
943 return false;
944 break;
945 default:
946 return false;
947 }
948 } else {
949 /* FIXME: check for float32 and AC3? */
950 }
951
952 return true;
953}
954EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
1b5e6167
SP		 955
956static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
957 int flags, unsigned int verb, unsigned int parm)
958{
959 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
960 unsigned int res;
961
962 if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
963 return -1;
964
965 return res;
966}
967
968static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
969 int flags, unsigned int verb, unsigned int parm)
970{
971 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
972
973 return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
974}
975
976/**
977 * snd_hdac_codec_read - send a command and get the response
978 * @hdac: the HDAC device
979 * @nid: NID to send the command
980 * @flags: optional bit flags
981 * @verb: the verb to send
982 * @parm: the parameter for the verb
983 *
984 * Send a single command and read the corresponding response.
985 *
986 * Returns the obtained response value, or -1 for an error.
987 */
988int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
989 int flags, unsigned int verb, unsigned int parm)
990{
991 return codec_read(hdac, nid, flags, verb, parm);
992}
993EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
994
995/**
996 * snd_hdac_codec_write - send a single command without waiting for response
997 * @hdac: the HDAC device
998 * @nid: NID to send the command
999 * @flags: optional bit flags
1000 * @verb: the verb to send
1001 * @parm: the parameter for the verb
1002 *
1003 * Send a single command without waiting for response.
1004 *
1005 * Returns 0 if successful, or a negative error code.
1006 */
1007int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1008 int flags, unsigned int verb, unsigned int parm)
1009{
1010 return codec_write(hdac, nid, flags, verb, parm);
1011}
1012EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1013
1014/*
1015 * snd_hdac_check_power_state: check whether the actual power state matches
1016 * with the target state
1017 *
1018 * @hdac: the HDAC device
1019 * @nid: NID to send the command
1020 * @target_state: target state to check for
1021 *
1022 * Return true if state matches, false if not
1023 */
1024bool snd_hdac_check_power_state(struct hdac_device *hdac,
1025 hda_nid_t nid, unsigned int target_state)
1026{
1027 unsigned int state = codec_read(hdac, nid, 0,
1028 AC_VERB_GET_POWER_STATE, 0);
1029
1030 if (state & AC_PWRST_ERROR)
1031 return true;
1032 state = (state >> 4) & 0x0f;
1033 return (state == target_state);
1034}
1035EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
Linux kernel - Deliverables
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