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Merge tag 'gpio-v4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
[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
ded255be
TI		 166/**
167 * snd_hdac_device_set_chip_name - set/update the codec name
168 * @codec: the HDAC device
169 * @name: name string to set
170 *
171 * Returns 0 if the name is set or updated, or a negative error code.
172 */
173int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
174{
175 char *newname;
176
177 if (!name)
178 return 0;
179 newname = kstrdup(name, GFP_KERNEL);
180 if (!newname)
181 return -ENOMEM;
182 kfree(codec->chip_name);
183 codec->chip_name = newname;
184 return 0;
185}
186EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
187
4f9e0c38
TI		 188/**
189 * snd_hdac_codec_modalias - give the module alias name
190 * @codec: HDAC device
191 * @buf: string buffer to store
192 * @size: string buffer size
193 *
194 * Returns the size of string, like snprintf(), or a negative error code.
195 */
196int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
197{
198 return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
199 codec->vendor_id, codec->revision_id, codec->type);
200}
201EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
202
7639a06c
TI		 203/**
204 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
205 * HD-audio controller
206 * @codec: the codec object
207 * @nid: NID to encode
208 * @verb: verb to encode
209 * @parm: parameter to encode
210 *
211 * Return an encoded command verb or -1 for error.
212 */
213unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
214 unsigned int verb, unsigned int parm)
215{
216 u32 val, addr;
217
218 addr = codec->addr;
219 if ((addr & ~0xf) || (nid & ~0x7f) ||
220 (verb & ~0xfff) || (parm & ~0xffff)) {
221 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
222 addr, nid, verb, parm);
223 return -1;
224 }
225
226 val = addr << 28;
227 val |= (u32)nid << 20;
228 val |= verb << 8;
229 val |= parm;
230 return val;
231}
232EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
233
05852448
TI		 234/**
235 * snd_hdac_exec_verb - execute an encoded verb
236 * @codec: the codec object
237 * @cmd: encoded verb to execute
238 * @flags: optional flags, pass zero for default
239 * @res: the pointer to store the result, NULL if running async
240 *
241 * Returns zero if successful, or a negative error code.
242 *
243 * This calls the exec_verb op when set in hdac_codec. If not,
244 * call the default snd_hdac_bus_exec_verb().
245 */
246int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
247 unsigned int flags, unsigned int *res)
248{
249 if (codec->exec_verb)
250 return codec->exec_verb(codec, cmd, flags, res);
251 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
252}
253EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
254
255
7639a06c
TI		 256/**
257 * snd_hdac_read - execute a verb
258 * @codec: the codec object
259 * @nid: NID to execute a verb
260 * @verb: verb to execute
261 * @parm: parameter for a verb
262 * @res: the pointer to store the result, NULL if running async
263 *
264 * Returns zero if successful, or a negative error code.
265 */
266int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
267 unsigned int verb, unsigned int parm, unsigned int *res)
268{
269 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
270
05852448 271 return snd_hdac_exec_verb(codec, cmd, 0, res);
7639a06c
TI		 272}
273EXPORT_SYMBOL_GPL(snd_hdac_read);
274
275/**
01ed3c06 276 * _snd_hdac_read_parm - read a parmeter
7639a06c 277 *
01ed3c06 278 * This function returns zero or an error unlike snd_hdac_read_parm().
7639a06c 279 */
01ed3c06
TI		 280int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
281 unsigned int *res)
7639a06c 282{
01ed3c06 283 unsigned int cmd;
7639a06c 284
01ed3c06
TI		 285 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
286 return snd_hdac_regmap_read_raw(codec, cmd, res);
7639a06c 287}
01ed3c06 288EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
7639a06c 289
9ba17b4d
TI		 290/**
291 * snd_hdac_read_parm_uncached - read a codec parameter without caching
7639a06c
TI		 292 * @codec: the codec object
293 * @nid: NID to read a parameter
294 * @parm: parameter to read
295 *
296 * Returns -1 for error. If you need to distinguish the error more
297 * strictly, use snd_hdac_read() directly.
298 */
9ba17b4d
TI		 299int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
300 int parm)
7639a06c 301{
3194ed49 302 unsigned int cmd, val;
7639a06c 303
3194ed49
TI		 304 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
305 if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
306 return -1;
7639a06c
TI		 307 return val;
308}
9ba17b4d
TI		 309EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
310
faa75f8a
TI		 311/**
312 * snd_hdac_override_parm - override read-only parameters
313 * @codec: the codec object
314 * @nid: NID for the parameter
315 * @parm: the parameter to change
316 * @val: the parameter value to overwrite
317 */
318int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
319 unsigned int parm, unsigned int val)
320{
321 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
322 int err;
323
324 if (!codec->regmap)
325 return -EINVAL;
326
327 codec->caps_overwriting = true;
328 err = snd_hdac_regmap_write_raw(codec, verb, val);
329 codec->caps_overwriting = false;
330 return err;
331}
332EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
7639a06c
TI		 333
334/**
335 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
336 * @codec: the codec object
337 * @nid: NID to inspect
338 * @start_id: the pointer to store the starting NID
339 *
340 * Returns the number of subtree nodes or zero if not found.
9ba17b4d 341 * This function reads parameters always without caching.
7639a06c
TI		 342 */
343int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
344 hda_nid_t *start_id)
345{
346 unsigned int parm;
347
9ba17b4d 348 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
7639a06c
TI		 349 if (parm == -1) {
350 *start_id = 0;
351 return 0;
352 }
353 *start_id = (parm >> 16) & 0x7fff;
354 return (int)(parm & 0x7fff);
355}
356EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
357
358/*
359 * look for an AFG and MFG nodes
360 */
361static void setup_fg_nodes(struct hdac_device *codec)
362{
363 int i, total_nodes, function_id;
364 hda_nid_t nid;
365
366 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
367 for (i = 0; i < total_nodes; i++, nid++) {
368 function_id = snd_hdac_read_parm(codec, nid,
369 AC_PAR_FUNCTION_TYPE);
370 switch (function_id & 0xff) {
371 case AC_GRP_AUDIO_FUNCTION:
372 codec->afg = nid;
373 codec->afg_function_id = function_id & 0xff;
374 codec->afg_unsol = (function_id >> 8) & 1;
375 break;
376 case AC_GRP_MODEM_FUNCTION:
377 codec->mfg = nid;
378 codec->mfg_function_id = function_id & 0xff;
379 codec->mfg_unsol = (function_id >> 8) & 1;
380 break;
381 default:
382 break;
383 }
384 }
385}
386
387/**
388 * snd_hdac_refresh_widgets - Reset the widget start/end nodes
389 * @codec: the codec object
390 */
391int snd_hdac_refresh_widgets(struct hdac_device *codec)
392{
393 hda_nid_t start_nid;
394 int nums;
395
396 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
397 if (!start_nid || nums <= 0 || nums >= 0xff) {
398 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
399 codec->afg);
400 return -EINVAL;
401 }
402
403 codec->num_nodes = nums;
404 codec->start_nid = start_nid;
405 codec->end_nid = start_nid + nums;
406 return 0;
407}
408EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
409
18dfd79d
VK		 410/**
411 * snd_hdac_refresh_widget_sysfs - Reset the codec widgets and reinit the
412 * codec sysfs
413 * @codec: the codec object
414 *
415 * first we need to remove sysfs, then refresh widgets and lastly
416 * recreate it
417 */
418int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec)
419{
420 int ret;
421
a92d5ee8
TI		 422 if (device_is_registered(&codec->dev))
423 hda_widget_sysfs_exit(codec);
18dfd79d
VK		 424 ret = snd_hdac_refresh_widgets(codec);
425 if (ret) {
426 dev_err(&codec->dev, "failed to refresh widget: %d\n", ret);
427 return ret;
428 }
a92d5ee8
TI		 429 if (device_is_registered(&codec->dev)) {
430 ret = hda_widget_sysfs_init(codec);
431 if (ret) {
432 dev_err(&codec->dev, "failed to init sysfs: %d\n", ret);
433 return ret;
434 }
18dfd79d 435 }
18dfd79d
VK		 436 return ret;
437}
438EXPORT_SYMBOL_GPL(snd_hdac_refresh_widget_sysfs);
439
7639a06c
TI		 440/* return CONNLIST_LEN parameter of the given widget */
441static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
442{
443 unsigned int wcaps = get_wcaps(codec, nid);
444 unsigned int parm;
445
446 if (!(wcaps & AC_WCAP_CONN_LIST) &&
447 get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
448 return 0;
449
450 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
451 if (parm == -1)
452 parm = 0;
453 return parm;
454}
455
456/**
457 * snd_hdac_get_connections - get a widget connection list
458 * @codec: the codec object
459 * @nid: NID
460 * @conn_list: the array to store the results, can be NULL
461 * @max_conns: the max size of the given array
462 *
463 * Returns the number of connected widgets, zero for no connection, or a
464 * negative error code. When the number of elements don't fit with the
465 * given array size, it returns -ENOSPC.
466 *
467 * When @conn_list is NULL, it just checks the number of connections.
468 */
469int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
470 hda_nid_t *conn_list, int max_conns)
471{
472 unsigned int parm;
473 int i, conn_len, conns, err;
474 unsigned int shift, num_elems, mask;
475 hda_nid_t prev_nid;
476 int null_count = 0;
477
478 parm = get_num_conns(codec, nid);
479 if (!parm)
480 return 0;
481
482 if (parm & AC_CLIST_LONG) {
483 /* long form */
484 shift = 16;
485 num_elems = 2;
486 } else {
487 /* short form */
488 shift = 8;
489 num_elems = 4;
490 }
491 conn_len = parm & AC_CLIST_LENGTH;
492 mask = (1 << (shift-1)) - 1;
493
494 if (!conn_len)
495 return 0; /* no connection */
496
497 if (conn_len == 1) {
498 /* single connection */
499 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
500 &parm);
501 if (err < 0)
502 return err;
503 if (conn_list)
504 conn_list[0] = parm & mask;
505 return 1;
506 }
507
508 /* multi connection */
509 conns = 0;
510 prev_nid = 0;
511 for (i = 0; i < conn_len; i++) {
512 int range_val;
513 hda_nid_t val, n;
514
515 if (i % num_elems == 0) {
516 err = snd_hdac_read(codec, nid,
517 AC_VERB_GET_CONNECT_LIST, i,
518 &parm);
519 if (err < 0)
520 return -EIO;
521 }
522 range_val = !!(parm & (1 << (shift-1))); /* ranges */
523 val = parm & mask;
524 if (val == 0 && null_count++) { /* no second chance */
525 dev_dbg(&codec->dev,
526 "invalid CONNECT_LIST verb %x[%i]:%x\n",
527 nid, i, parm);
528 return 0;
529 }
530 parm >>= shift;
531 if (range_val) {
532 /* ranges between the previous and this one */
533 if (!prev_nid || prev_nid >= val) {
534 dev_warn(&codec->dev,
535 "invalid dep_range_val %x:%x\n",
536 prev_nid, val);
537 continue;
538 }
539 for (n = prev_nid + 1; n <= val; n++) {
540 if (conn_list) {
541 if (conns >= max_conns)
542 return -ENOSPC;
543 conn_list[conns] = n;
544 }
545 conns++;
546 }
547 } else {
548 if (conn_list) {
549 if (conns >= max_conns)
550 return -ENOSPC;
551 conn_list[conns] = val;
552 }
553 conns++;
554 }
555 prev_nid = val;
556 }
557 return conns;
558}
559EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
560
561#ifdef CONFIG_PM
562/**
664c7155 563 * snd_hdac_power_up - power up the codec
7639a06c 564 * @codec: the codec object
664c7155
TI		 565 *
566 * This function calls the runtime PM helper to power up the given codec.
567 * Unlike snd_hdac_power_up_pm(), you should call this only for the code
568 * path that isn't included in PM path. Otherwise it gets stuck.
fbce23a0
TI		 569 *
570 * Returns zero if successful, or a negative error code.
7639a06c 571 */
fbce23a0 572int snd_hdac_power_up(struct hdac_device *codec)
7639a06c 573{
fbce23a0 574 return pm_runtime_get_sync(&codec->dev);
7639a06c
TI		 575}
576EXPORT_SYMBOL_GPL(snd_hdac_power_up);
577
578/**
664c7155 579 * snd_hdac_power_down - power down the codec
7639a06c 580 * @codec: the codec object
fbce23a0
TI		 581 *
582 * Returns zero if successful, or a negative error code.
7639a06c 583 */
fbce23a0 584int snd_hdac_power_down(struct hdac_device *codec)
7639a06c
TI		 585{
586 struct device *dev = &codec->dev;
587
7639a06c 588 pm_runtime_mark_last_busy(dev);
fbce23a0 589 return pm_runtime_put_autosuspend(dev);
7639a06c
TI		 590}
591EXPORT_SYMBOL_GPL(snd_hdac_power_down);
c3aeda62
TI		 592
593/**
594 * snd_hdac_power_up_pm - power up the codec
595 * @codec: the codec object
596 *
597 * This function can be called in a recursive code path like init code
598 * which may be called by PM suspend/resume again. OTOH, if a power-up
599 * call must wake up the sleeper (e.g. in a kctl callback), use
600 * snd_hdac_power_up() instead.
fbce23a0
TI		 601 *
602 * Returns zero if successful, or a negative error code.
c3aeda62 603 */
fbce23a0 604int snd_hdac_power_up_pm(struct hdac_device *codec)
c3aeda62
TI		 605{
606 if (!atomic_inc_not_zero(&codec->in_pm))
fbce23a0
TI		 607 return snd_hdac_power_up(codec);
608 return 0;
c3aeda62
TI		 609}
610EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
611
fc4f000b
TI		 612/* like snd_hdac_power_up_pm(), but only increment the pm count when
613 * already powered up. Returns -1 if not powered up, 1 if incremented
614 * or 0 if unchanged. Only used in hdac_regmap.c
615 */
616int snd_hdac_keep_power_up(struct hdac_device *codec)
617{
618 if (!atomic_inc_not_zero(&codec->in_pm)) {
619 int ret = pm_runtime_get_if_in_use(&codec->dev);
620 if (!ret)
621 return -1;
622 if (ret < 0)
623 return 0;
624 }
625 return 1;
626}
627
c3aeda62
TI		 628/**
629 * snd_hdac_power_down_pm - power down the codec
630 * @codec: the codec object
631 *
632 * Like snd_hdac_power_up_pm(), this function is used in a recursive
633 * code path like init code which may be called by PM suspend/resume again.
fbce23a0
TI		 634 *
635 * Returns zero if successful, or a negative error code.
c3aeda62 636 */
fbce23a0 637int snd_hdac_power_down_pm(struct hdac_device *codec)
c3aeda62
TI		 638{
639 if (atomic_dec_if_positive(&codec->in_pm) < 0)
fbce23a0
TI		 640 return snd_hdac_power_down(codec);
641 return 0;
c3aeda62
TI		 642}
643EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
7639a06c
TI		 644#endif
645
78dd5e21
TI		 646/**
647 * snd_hdac_link_power - Enable/disable the link power for a codec
648 * @codec: the codec object
649 * @bool: enable or disable the link power
a5e7e07c
ML		 650 */
651int snd_hdac_link_power(struct hdac_device *codec, bool enable)
652{
653 if (!codec->link_power_control)
654 return 0;
655
656 if (codec->bus->ops->link_power)
657 return codec->bus->ops->link_power(codec->bus, enable);
658 else
659 return -EINVAL;
660}
661EXPORT_SYMBOL_GPL(snd_hdac_link_power);
662
7639a06c
TI		 663/* codec vendor labels */
664struct hda_vendor_id {
665 unsigned int id;
666 const char *name;
667};
668
669static struct hda_vendor_id hda_vendor_ids[] = {
670 { 0x1002, "ATI" },
671 { 0x1013, "Cirrus Logic" },
672 { 0x1057, "Motorola" },
673 { 0x1095, "Silicon Image" },
674 { 0x10de, "Nvidia" },
675 { 0x10ec, "Realtek" },
676 { 0x1102, "Creative" },
677 { 0x1106, "VIA" },
678 { 0x111d, "IDT" },
679 { 0x11c1, "LSI" },
680 { 0x11d4, "Analog Devices" },
681 { 0x13f6, "C-Media" },
682 { 0x14f1, "Conexant" },
683 { 0x17e8, "Chrontel" },
684 { 0x1854, "LG" },
685 { 0x1aec, "Wolfson Microelectronics" },
686 { 0x1af4, "QEMU" },
687 { 0x434d, "C-Media" },
688 { 0x8086, "Intel" },
689 { 0x8384, "SigmaTel" },
690 {} /* terminator */
691};
692
693/* store the codec vendor name */
694static int get_codec_vendor_name(struct hdac_device *codec)
695{
696 const struct hda_vendor_id *c;
697 u16 vendor_id = codec->vendor_id >> 16;
698
699 for (c = hda_vendor_ids; c->id; c++) {
700 if (c->id == vendor_id) {
701 codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
702 return codec->vendor_name ? 0 : -ENOMEM;
703 }
704 }
705
706 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
707 return codec->vendor_name ? 0 : -ENOMEM;
708}
b7d023e1
TI		 709
710/*
711 * stream formats
712 */
713struct hda_rate_tbl {
714 unsigned int hz;
715 unsigned int alsa_bits;
716 unsigned int hda_fmt;
717};
718
719/* rate = base * mult / div */
720#define HDA_RATE(base, mult, div) \
721 (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
722 (((div) - 1) << AC_FMT_DIV_SHIFT))
723
724static struct hda_rate_tbl rate_bits[] = {
725 /* rate in Hz, ALSA rate bitmask, HDA format value */
726
727 /* autodetected value used in snd_hda_query_supported_pcm */
728 { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
729 { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
730 { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
731 { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
732 { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
733 { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
734 { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
735 { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
736 { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
737 { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
738 { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
739#define AC_PAR_PCM_RATE_BITS 11
740 /* up to bits 10, 384kHZ isn't supported properly */
741
742 /* not autodetected value */
743 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
744
745 { 0 } /* terminator */
746};
747
748/**
749 * snd_hdac_calc_stream_format - calculate the format bitset
750 * @rate: the sample rate
751 * @channels: the number of channels
752 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
753 * @maxbps: the max. bps
754 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
755 *
756 * Calculate the format bitset from the given rate, channels and th PCM format.
757 *
758 * Return zero if invalid.
759 */
760unsigned int snd_hdac_calc_stream_format(unsigned int rate,
761 unsigned int channels,
762 unsigned int format,
763 unsigned int maxbps,
764 unsigned short spdif_ctls)
765{
766 int i;
767 unsigned int val = 0;
768
769 for (i = 0; rate_bits[i].hz; i++)
770 if (rate_bits[i].hz == rate) {
771 val = rate_bits[i].hda_fmt;
772 break;
773 }
774 if (!rate_bits[i].hz)
775 return 0;
776
777 if (channels == 0 || channels > 8)
778 return 0;
779 val |= channels - 1;
780
781 switch (snd_pcm_format_width(format)) {
782 case 8:
783 val |= AC_FMT_BITS_8;
784 break;
785 case 16:
786 val |= AC_FMT_BITS_16;
787 break;
788 case 20:
789 case 24:
790 case 32:
791 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
792 val |= AC_FMT_BITS_32;
793 else if (maxbps >= 24)
794 val |= AC_FMT_BITS_24;
795 else
796 val |= AC_FMT_BITS_20;
797 break;
798 default:
799 return 0;
800 }
801
802 if (spdif_ctls & AC_DIG1_NONAUDIO)
803 val |= AC_FMT_TYPE_NON_PCM;
804
805 return val;
806}
807EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
808
809static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
810{
811 unsigned int val = 0;
812
813 if (nid != codec->afg &&
814 (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
815 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
816 if (!val || val == -1)
817 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
818 if (!val || val == -1)
819 return 0;
820 return val;
821}
822
823static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
824{
825 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
826
827 if (!streams || streams == -1)
828 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
829 if (!streams || streams == -1)
830 return 0;
831 return streams;
832}
833
834/**
835 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
836 * @codec: the codec object
837 * @nid: NID to query
838 * @ratesp: the pointer to store the detected rate bitflags
839 * @formatsp: the pointer to store the detected formats
840 * @bpsp: the pointer to store the detected format widths
841 *
842 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp
843 * or @bsps argument is ignored.
844 *
845 * Returns 0 if successful, otherwise a negative error code.
846 */
847int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
848 u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
849{
850 unsigned int i, val, wcaps;
851
852 wcaps = get_wcaps(codec, nid);
853 val = query_pcm_param(codec, nid);
854
855 if (ratesp) {
856 u32 rates = 0;
857 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
858 if (val & (1 << i))
859 rates |= rate_bits[i].alsa_bits;
860 }
861 if (rates == 0) {
862 dev_err(&codec->dev,
863 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
864 nid, val,
865 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
866 return -EIO;
867 }
868 *ratesp = rates;
869 }
870
871 if (formatsp || bpsp) {
872 u64 formats = 0;
873 unsigned int streams, bps;
874
875 streams = query_stream_param(codec, nid);
876 if (!streams)
877 return -EIO;
878
879 bps = 0;
880 if (streams & AC_SUPFMT_PCM) {
881 if (val & AC_SUPPCM_BITS_8) {
882 formats |= SNDRV_PCM_FMTBIT_U8;
883 bps = 8;
884 }
885 if (val & AC_SUPPCM_BITS_16) {
886 formats |= SNDRV_PCM_FMTBIT_S16_LE;
887 bps = 16;
888 }
889 if (wcaps & AC_WCAP_DIGITAL) {
890 if (val & AC_SUPPCM_BITS_32)
891 formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
892 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
893 formats |= SNDRV_PCM_FMTBIT_S32_LE;
894 if (val & AC_SUPPCM_BITS_24)
895 bps = 24;
896 else if (val & AC_SUPPCM_BITS_20)
897 bps = 20;
898 } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
899 AC_SUPPCM_BITS_32)) {
900 formats |= SNDRV_PCM_FMTBIT_S32_LE;
901 if (val & AC_SUPPCM_BITS_32)
902 bps = 32;
903 else if (val & AC_SUPPCM_BITS_24)
904 bps = 24;
905 else if (val & AC_SUPPCM_BITS_20)
906 bps = 20;
907 }
908 }
909#if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
910 if (streams & AC_SUPFMT_FLOAT32) {
911 formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
912 if (!bps)
913 bps = 32;
914 }
915#endif
916 if (streams == AC_SUPFMT_AC3) {
917 /* should be exclusive */
918 /* temporary hack: we have still no proper support
919 * for the direct AC3 stream...
920 */
921 formats |= SNDRV_PCM_FMTBIT_U8;
922 bps = 8;
923 }
924 if (formats == 0) {
925 dev_err(&codec->dev,
926 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
927 nid, val,
928 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
929 streams);
930 return -EIO;
931 }
932 if (formatsp)
933 *formatsp = formats;
934 if (bpsp)
935 *bpsp = bps;
936 }
937
938 return 0;
939}
940EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
941
942/**
943 * snd_hdac_is_supported_format - Check the validity of the format
944 * @codec: the codec object
945 * @nid: NID to check
946 * @format: the HD-audio format value to check
947 *
948 * Check whether the given node supports the format value.
949 *
950 * Returns true if supported, false if not.
951 */
952bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
953 unsigned int format)
954{
955 int i;
956 unsigned int val = 0, rate, stream;
957
958 val = query_pcm_param(codec, nid);
959 if (!val)
960 return false;
961
962 rate = format & 0xff00;
963 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
964 if (rate_bits[i].hda_fmt == rate) {
965 if (val & (1 << i))
966 break;
967 return false;
968 }
969 if (i >= AC_PAR_PCM_RATE_BITS)
970 return false;
971
972 stream = query_stream_param(codec, nid);
973 if (!stream)
974 return false;
975
976 if (stream & AC_SUPFMT_PCM) {
977 switch (format & 0xf0) {
978 case 0x00:
979 if (!(val & AC_SUPPCM_BITS_8))
980 return false;
981 break;
982 case 0x10:
983 if (!(val & AC_SUPPCM_BITS_16))
984 return false;
985 break;
986 case 0x20:
987 if (!(val & AC_SUPPCM_BITS_20))
988 return false;
989 break;
990 case 0x30:
991 if (!(val & AC_SUPPCM_BITS_24))
992 return false;
993 break;
994 case 0x40:
995 if (!(val & AC_SUPPCM_BITS_32))
996 return false;
997 break;
998 default:
999 return false;
1000 }
1001 } else {
1002 /* FIXME: check for float32 and AC3? */
1003 }
1004
1005 return true;
1006}
1007EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
1b5e6167
SP		 1008
1009static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
1010 int flags, unsigned int verb, unsigned int parm)
1011{
1012 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1013 unsigned int res;
1014
1015 if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
1016 return -1;
1017
1018 return res;
1019}
1020
1021static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1022 int flags, unsigned int verb, unsigned int parm)
1023{
1024 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1025
1026 return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
1027}
1028
1029/**
1030 * snd_hdac_codec_read - send a command and get the response
1031 * @hdac: the HDAC device
1032 * @nid: NID to send the command
1033 * @flags: optional bit flags
1034 * @verb: the verb to send
1035 * @parm: the parameter for the verb
1036 *
1037 * Send a single command and read the corresponding response.
1038 *
1039 * Returns the obtained response value, or -1 for an error.
1040 */
1041int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1042 int flags, unsigned int verb, unsigned int parm)
1043{
1044 return codec_read(hdac, nid, flags, verb, parm);
1045}
1046EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1047
1048/**
1049 * snd_hdac_codec_write - send a single command without waiting for response
1050 * @hdac: the HDAC device
1051 * @nid: NID to send the command
1052 * @flags: optional bit flags
1053 * @verb: the verb to send
1054 * @parm: the parameter for the verb
1055 *
1056 * Send a single command without waiting for response.
1057 *
1058 * Returns 0 if successful, or a negative error code.
1059 */
1060int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1061 int flags, unsigned int verb, unsigned int parm)
1062{
1063 return codec_write(hdac, nid, flags, verb, parm);
1064}
1065EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1066
78dd5e21
TI		 1067/**
1068 * snd_hdac_check_power_state - check whether the actual power state matches
1b5e6167
SP		 1069 * with the target state
1070 *
1071 * @hdac: the HDAC device
1072 * @nid: NID to send the command
1073 * @target_state: target state to check for
1074 *
1075 * Return true if state matches, false if not
1076 */
1077bool snd_hdac_check_power_state(struct hdac_device *hdac,
1078 hda_nid_t nid, unsigned int target_state)
1079{
1080 unsigned int state = codec_read(hdac, nid, 0,
1081 AC_VERB_GET_POWER_STATE, 0);
1082
1083 if (state & AC_PWRST_ERROR)
1084 return true;
1085 state = (state >> 4) & 0x0f;
1086 return (state == target_state);
1087}
1088EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
Linux kernel - Deliverables
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