1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * HD-audio codec core device
4 */
5
6 #include <linux/init.h>
7 #include <linux/delay.h>
8 #include <linux/device.h>
9 #include <linux/slab.h>
10 #include <linux/module.h>
11 #include <linux/export.h>
12 #include <linux/pm_runtime.h>
13 #include <sound/hdaudio.h>
14 #include <sound/hda_regmap.h>
15 #include <sound/pcm.h>
16 #include "local.h"
17
18 static void setup_fg_nodes(struct hdac_device *codec);
19 static int get_codec_vendor_name(struct hdac_device *codec);
20
default_release(struct device * dev)21 static void default_release(struct device *dev)
22 {
23 snd_hdac_device_exit(dev_to_hdac_dev(dev));
24 }
25
26 /**
27 * snd_hdac_device_init - initialize the HD-audio codec base device
28 * @codec: device to initialize
29 * @bus: but to attach
30 * @name: device name string
31 * @addr: codec address
32 *
33 * Returns zero for success or a negative error code.
34 *
35 * This function increments the runtime PM counter and marks it active.
36 * The caller needs to turn it off appropriately later.
37 *
38 * The caller needs to set the device's release op properly by itself.
39 */
snd_hdac_device_init(struct hdac_device * codec,struct hdac_bus * bus,const char * name,unsigned int addr)40 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
41 const char *name, unsigned int addr)
42 {
43 struct device *dev;
44 hda_nid_t fg;
45 int err;
46
47 dev = &codec->dev;
48 device_initialize(dev);
49 dev->parent = bus->dev;
50 dev->bus = &snd_hda_bus_type;
51 dev->release = default_release;
52 dev->groups = hdac_dev_attr_groups;
53 dev_set_name(dev, "%s", name);
54 device_enable_async_suspend(dev);
55
56 codec->bus = bus;
57 codec->addr = addr;
58 codec->type = HDA_DEV_CORE;
59 mutex_init(&codec->widget_lock);
60 mutex_init(&codec->regmap_lock);
61 pm_runtime_set_active(&codec->dev);
62 pm_runtime_get_noresume(&codec->dev);
63 atomic_set(&codec->in_pm, 0);
64
65 err = snd_hdac_bus_add_device(bus, codec);
66 if (err < 0)
67 goto error;
68
69 /* fill parameters */
70 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
71 AC_PAR_VENDOR_ID);
72 if (codec->vendor_id == -1) {
73 /* read again, hopefully the access method was corrected
74 * in the last read...
75 */
76 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
77 AC_PAR_VENDOR_ID);
78 }
79
80 codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
81 AC_PAR_SUBSYSTEM_ID);
82 codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
83 AC_PAR_REV_ID);
84
85 setup_fg_nodes(codec);
86 if (!codec->afg && !codec->mfg) {
87 dev_err(dev, "no AFG or MFG node found\n");
88 err = -ENODEV;
89 goto error;
90 }
91
92 fg = codec->afg ? codec->afg : codec->mfg;
93
94 err = snd_hdac_refresh_widgets(codec);
95 if (err < 0)
96 goto error;
97
98 codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
99 /* reread ssid if not set by parameter */
100 if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
101 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
102 &codec->subsystem_id);
103
104 err = get_codec_vendor_name(codec);
105 if (err < 0)
106 goto error;
107
108 codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
109 codec->vendor_id & 0xffff);
110 if (!codec->chip_name) {
111 err = -ENOMEM;
112 goto error;
113 }
114
115 return 0;
116
117 error:
118 put_device(&codec->dev);
119 return err;
120 }
121 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
122
123 /**
124 * snd_hdac_device_exit - clean up the HD-audio codec base device
125 * @codec: device to clean up
126 */
snd_hdac_device_exit(struct hdac_device * codec)127 void snd_hdac_device_exit(struct hdac_device *codec)
128 {
129 pm_runtime_put_noidle(&codec->dev);
130 /* keep balance of runtime PM child_count in parent device */
131 pm_runtime_set_suspended(&codec->dev);
132 snd_hdac_bus_remove_device(codec->bus, codec);
133 kfree(codec->vendor_name);
134 kfree(codec->chip_name);
135 }
136 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
137
138 /**
139 * snd_hdac_device_register - register the hd-audio codec base device
140 * @codec: the device to register
141 */
snd_hdac_device_register(struct hdac_device * codec)142 int snd_hdac_device_register(struct hdac_device *codec)
143 {
144 int err;
145
146 err = device_add(&codec->dev);
147 if (err < 0)
148 return err;
149 mutex_lock(&codec->widget_lock);
150 err = hda_widget_sysfs_init(codec);
151 mutex_unlock(&codec->widget_lock);
152 if (err < 0) {
153 device_del(&codec->dev);
154 return err;
155 }
156
157 return 0;
158 }
159 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
160
161 /**
162 * snd_hdac_device_unregister - unregister the hd-audio codec base device
163 * @codec: the device to unregister
164 */
snd_hdac_device_unregister(struct hdac_device * codec)165 void snd_hdac_device_unregister(struct hdac_device *codec)
166 {
167 if (device_is_registered(&codec->dev)) {
168 mutex_lock(&codec->widget_lock);
169 hda_widget_sysfs_exit(codec);
170 mutex_unlock(&codec->widget_lock);
171 device_del(&codec->dev);
172 snd_hdac_bus_remove_device(codec->bus, codec);
173 }
174 }
175 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
176
177 /**
178 * snd_hdac_device_set_chip_name - set/update the codec name
179 * @codec: the HDAC device
180 * @name: name string to set
181 *
182 * Returns 0 if the name is set or updated, or a negative error code.
183 */
snd_hdac_device_set_chip_name(struct hdac_device * codec,const char * name)184 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
185 {
186 char *newname;
187
188 if (!name)
189 return 0;
190 newname = kstrdup(name, GFP_KERNEL);
191 if (!newname)
192 return -ENOMEM;
193 kfree(codec->chip_name);
194 codec->chip_name = newname;
195 return 0;
196 }
197 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
198
199 /**
200 * snd_hdac_codec_modalias - give the module alias name
201 * @codec: HDAC device
202 * @buf: string buffer to store
203 * @size: string buffer size
204 *
205 * Returns the size of string, like snprintf(), or a negative error code.
206 */
snd_hdac_codec_modalias(struct hdac_device * codec,char * buf,size_t size)207 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
208 {
209 return scnprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
210 codec->vendor_id, codec->revision_id, codec->type);
211 }
212 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
213
214 /**
215 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
216 * HD-audio controller
217 * @codec: the codec object
218 * @nid: NID to encode
219 * @verb: verb to encode
220 * @parm: parameter to encode
221 *
222 * Return an encoded command verb or -1 for error.
223 */
snd_hdac_make_cmd(struct hdac_device * codec,hda_nid_t nid,unsigned int verb,unsigned int parm)224 static unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
225 unsigned int verb, unsigned int parm)
226 {
227 u32 val, addr;
228
229 addr = codec->addr;
230 if ((addr & ~0xf) || (nid & ~0x7f) ||
231 (verb & ~0xfff) || (parm & ~0xffff)) {
232 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
233 addr, nid, verb, parm);
234 return -1;
235 }
236
237 val = addr << 28;
238 val |= (u32)nid << 20;
239 val |= verb << 8;
240 val |= parm;
241 return val;
242 }
243
244 /**
245 * snd_hdac_exec_verb - execute an encoded verb
246 * @codec: the codec object
247 * @cmd: encoded verb to execute
248 * @flags: optional flags, pass zero for default
249 * @res: the pointer to store the result, NULL if running async
250 *
251 * Returns zero if successful, or a negative error code.
252 *
253 * This calls the exec_verb op when set in hdac_codec. If not,
254 * call the default snd_hdac_bus_exec_verb().
255 */
snd_hdac_exec_verb(struct hdac_device * codec,unsigned int cmd,unsigned int flags,unsigned int * res)256 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
257 unsigned int flags, unsigned int *res)
258 {
259 if (codec->exec_verb)
260 return codec->exec_verb(codec, cmd, flags, res);
261 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
262 }
263
264
265 /**
266 * snd_hdac_read - execute a verb
267 * @codec: the codec object
268 * @nid: NID to execute a verb
269 * @verb: verb to execute
270 * @parm: parameter for a verb
271 * @res: the pointer to store the result, NULL if running async
272 *
273 * Returns zero if successful, or a negative error code.
274 */
snd_hdac_read(struct hdac_device * codec,hda_nid_t nid,unsigned int verb,unsigned int parm,unsigned int * res)275 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
276 unsigned int verb, unsigned int parm, unsigned int *res)
277 {
278 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
279
280 return snd_hdac_exec_verb(codec, cmd, 0, res);
281 }
282 EXPORT_SYMBOL_GPL(snd_hdac_read);
283
284 /**
285 * _snd_hdac_read_parm - read a parmeter
286 * @codec: the codec object
287 * @nid: NID to read a parameter
288 * @parm: parameter to read
289 * @res: pointer to store the read value
290 *
291 * This function returns zero or an error unlike snd_hdac_read_parm().
292 */
_snd_hdac_read_parm(struct hdac_device * codec,hda_nid_t nid,int parm,unsigned int * res)293 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
294 unsigned int *res)
295 {
296 unsigned int cmd;
297
298 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
299 return snd_hdac_regmap_read_raw(codec, cmd, res);
300 }
301 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
302
303 /**
304 * snd_hdac_read_parm_uncached - read a codec parameter without caching
305 * @codec: the codec object
306 * @nid: NID to read a parameter
307 * @parm: parameter to read
308 *
309 * Returns -1 for error. If you need to distinguish the error more
310 * strictly, use snd_hdac_read() directly.
311 */
snd_hdac_read_parm_uncached(struct hdac_device * codec,hda_nid_t nid,int parm)312 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
313 int parm)
314 {
315 unsigned int cmd, val;
316
317 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
318 if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
319 return -1;
320 return val;
321 }
322 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
323
324 /**
325 * snd_hdac_override_parm - override read-only parameters
326 * @codec: the codec object
327 * @nid: NID for the parameter
328 * @parm: the parameter to change
329 * @val: the parameter value to overwrite
330 */
snd_hdac_override_parm(struct hdac_device * codec,hda_nid_t nid,unsigned int parm,unsigned int val)331 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
332 unsigned int parm, unsigned int val)
333 {
334 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
335 int err;
336
337 if (!codec->regmap)
338 return -EINVAL;
339
340 codec->caps_overwriting = true;
341 err = snd_hdac_regmap_write_raw(codec, verb, val);
342 codec->caps_overwriting = false;
343 return err;
344 }
345 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
346
347 /**
348 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
349 * @codec: the codec object
350 * @nid: NID to inspect
351 * @start_id: the pointer to store the starting NID
352 *
353 * Returns the number of subtree nodes or zero if not found.
354 * This function reads parameters always without caching.
355 */
snd_hdac_get_sub_nodes(struct hdac_device * codec,hda_nid_t nid,hda_nid_t * start_id)356 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
357 hda_nid_t *start_id)
358 {
359 unsigned int parm;
360
361 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
362 if (parm == -1) {
363 *start_id = 0;
364 return 0;
365 }
366 *start_id = (parm >> 16) & 0x7fff;
367 return (int)(parm & 0x7fff);
368 }
369 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
370
371 /*
372 * look for an AFG and MFG nodes
373 */
setup_fg_nodes(struct hdac_device * codec)374 static void setup_fg_nodes(struct hdac_device *codec)
375 {
376 int i, total_nodes, function_id;
377 hda_nid_t nid;
378
379 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
380 for (i = 0; i < total_nodes; i++, nid++) {
381 function_id = snd_hdac_read_parm(codec, nid,
382 AC_PAR_FUNCTION_TYPE);
383 switch (function_id & 0xff) {
384 case AC_GRP_AUDIO_FUNCTION:
385 codec->afg = nid;
386 codec->afg_function_id = function_id & 0xff;
387 codec->afg_unsol = (function_id >> 8) & 1;
388 break;
389 case AC_GRP_MODEM_FUNCTION:
390 codec->mfg = nid;
391 codec->mfg_function_id = function_id & 0xff;
392 codec->mfg_unsol = (function_id >> 8) & 1;
393 break;
394 default:
395 break;
396 }
397 }
398 }
399
400 /**
401 * snd_hdac_refresh_widgets - Reset the widget start/end nodes
402 * @codec: the codec object
403 */
snd_hdac_refresh_widgets(struct hdac_device * codec)404 int snd_hdac_refresh_widgets(struct hdac_device *codec)
405 {
406 hda_nid_t start_nid;
407 int nums, err = 0;
408
409 /*
410 * Serialize against multiple threads trying to update the sysfs
411 * widgets array.
412 */
413 mutex_lock(&codec->widget_lock);
414 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
415 if (!start_nid || nums <= 0 || nums >= 0xff) {
416 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
417 codec->afg);
418 err = -EINVAL;
419 goto unlock;
420 }
421
422 err = hda_widget_sysfs_reinit(codec, start_nid, nums);
423 if (err < 0)
424 goto unlock;
425
426 codec->num_nodes = nums;
427 codec->start_nid = start_nid;
428 codec->end_nid = start_nid + nums;
429 unlock:
430 mutex_unlock(&codec->widget_lock);
431 return err;
432 }
433 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
434
435 /* return CONNLIST_LEN parameter of the given widget */
get_num_conns(struct hdac_device * codec,hda_nid_t nid)436 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
437 {
438 unsigned int wcaps = get_wcaps(codec, nid);
439 unsigned int parm;
440
441 if (!(wcaps & AC_WCAP_CONN_LIST) &&
442 get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
443 return 0;
444
445 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
446 if (parm == -1)
447 parm = 0;
448 return parm;
449 }
450
451 /**
452 * snd_hdac_get_connections - get a widget connection list
453 * @codec: the codec object
454 * @nid: NID
455 * @conn_list: the array to store the results, can be NULL
456 * @max_conns: the max size of the given array
457 *
458 * Returns the number of connected widgets, zero for no connection, or a
459 * negative error code. When the number of elements don't fit with the
460 * given array size, it returns -ENOSPC.
461 *
462 * When @conn_list is NULL, it just checks the number of connections.
463 */
snd_hdac_get_connections(struct hdac_device * codec,hda_nid_t nid,hda_nid_t * conn_list,int max_conns)464 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
465 hda_nid_t *conn_list, int max_conns)
466 {
467 unsigned int parm;
468 int i, conn_len, conns, err;
469 unsigned int shift, num_elems, mask;
470 hda_nid_t prev_nid;
471 int null_count = 0;
472
473 parm = get_num_conns(codec, nid);
474 if (!parm)
475 return 0;
476
477 if (parm & AC_CLIST_LONG) {
478 /* long form */
479 shift = 16;
480 num_elems = 2;
481 } else {
482 /* short form */
483 shift = 8;
484 num_elems = 4;
485 }
486 conn_len = parm & AC_CLIST_LENGTH;
487 mask = (1 << (shift-1)) - 1;
488
489 if (!conn_len)
490 return 0; /* no connection */
491
492 if (conn_len == 1) {
493 /* single connection */
494 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
495 &parm);
496 if (err < 0)
497 return err;
498 if (conn_list)
499 conn_list[0] = parm & mask;
500 return 1;
501 }
502
503 /* multi connection */
504 conns = 0;
505 prev_nid = 0;
506 for (i = 0; i < conn_len; i++) {
507 int range_val;
508 hda_nid_t val, n;
509
510 if (i % num_elems == 0) {
511 err = snd_hdac_read(codec, nid,
512 AC_VERB_GET_CONNECT_LIST, i,
513 &parm);
514 if (err < 0)
515 return -EIO;
516 }
517 range_val = !!(parm & (1 << (shift-1))); /* ranges */
518 val = parm & mask;
519 if (val == 0 && null_count++) { /* no second chance */
520 dev_dbg(&codec->dev,
521 "invalid CONNECT_LIST verb %x[%i]:%x\n",
522 nid, i, parm);
523 return 0;
524 }
525 parm >>= shift;
526 if (range_val) {
527 /* ranges between the previous and this one */
528 if (!prev_nid || prev_nid >= val) {
529 dev_warn(&codec->dev,
530 "invalid dep_range_val %x:%x\n",
531 prev_nid, val);
532 continue;
533 }
534 for (n = prev_nid + 1; n <= val; n++) {
535 if (conn_list) {
536 if (conns >= max_conns)
537 return -ENOSPC;
538 conn_list[conns] = n;
539 }
540 conns++;
541 }
542 } else {
543 if (conn_list) {
544 if (conns >= max_conns)
545 return -ENOSPC;
546 conn_list[conns] = val;
547 }
548 conns++;
549 }
550 prev_nid = val;
551 }
552 return conns;
553 }
554 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
555
556 #ifdef CONFIG_PM
557 /**
558 * snd_hdac_power_up - power up the codec
559 * @codec: the codec object
560 *
561 * This function calls the runtime PM helper to power up the given codec.
562 * Unlike snd_hdac_power_up_pm(), you should call this only for the code
563 * path that isn't included in PM path. Otherwise it gets stuck.
564 *
565 * Returns zero if successful, or a negative error code.
566 */
snd_hdac_power_up(struct hdac_device * codec)567 int snd_hdac_power_up(struct hdac_device *codec)
568 {
569 return pm_runtime_get_sync(&codec->dev);
570 }
571 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
572
573 /**
574 * snd_hdac_power_down - power down the codec
575 * @codec: the codec object
576 *
577 * Returns zero if successful, or a negative error code.
578 */
snd_hdac_power_down(struct hdac_device * codec)579 int snd_hdac_power_down(struct hdac_device *codec)
580 {
581 struct device *dev = &codec->dev;
582
583 pm_runtime_mark_last_busy(dev);
584 return pm_runtime_put_autosuspend(dev);
585 }
586 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
587
588 /**
589 * snd_hdac_power_up_pm - power up the codec
590 * @codec: the codec object
591 *
592 * This function can be called in a recursive code path like init code
593 * which may be called by PM suspend/resume again. OTOH, if a power-up
594 * call must wake up the sleeper (e.g. in a kctl callback), use
595 * snd_hdac_power_up() instead.
596 *
597 * Returns zero if successful, or a negative error code.
598 */
snd_hdac_power_up_pm(struct hdac_device * codec)599 int snd_hdac_power_up_pm(struct hdac_device *codec)
600 {
601 if (!atomic_inc_not_zero(&codec->in_pm))
602 return snd_hdac_power_up(codec);
603 return 0;
604 }
605 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
606
607 /* like snd_hdac_power_up_pm(), but only increment the pm count when
608 * already powered up. Returns -1 if not powered up, 1 if incremented
609 * or 0 if unchanged. Only used in hdac_regmap.c
610 */
snd_hdac_keep_power_up(struct hdac_device * codec)611 int snd_hdac_keep_power_up(struct hdac_device *codec)
612 {
613 if (!atomic_inc_not_zero(&codec->in_pm)) {
614 int ret = pm_runtime_get_if_active(&codec->dev, true);
615 if (!ret)
616 return -1;
617 if (ret < 0)
618 return 0;
619 }
620 return 1;
621 }
622
623 /**
624 * snd_hdac_power_down_pm - power down the codec
625 * @codec: the codec object
626 *
627 * Like snd_hdac_power_up_pm(), this function is used in a recursive
628 * code path like init code which may be called by PM suspend/resume again.
629 *
630 * Returns zero if successful, or a negative error code.
631 */
snd_hdac_power_down_pm(struct hdac_device * codec)632 int snd_hdac_power_down_pm(struct hdac_device *codec)
633 {
634 if (atomic_dec_if_positive(&codec->in_pm) < 0)
635 return snd_hdac_power_down(codec);
636 return 0;
637 }
638 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
639 #endif
640
641 /* codec vendor labels */
642 struct hda_vendor_id {
643 unsigned int id;
644 const char *name;
645 };
646
647 static const struct hda_vendor_id hda_vendor_ids[] = {
648 { 0x1002, "ATI" },
649 { 0x1013, "Cirrus Logic" },
650 { 0x1057, "Motorola" },
651 { 0x1095, "Silicon Image" },
652 { 0x10de, "Nvidia" },
653 { 0x10ec, "Realtek" },
654 { 0x1102, "Creative" },
655 { 0x1106, "VIA" },
656 { 0x111d, "IDT" },
657 { 0x11c1, "LSI" },
658 { 0x11d4, "Analog Devices" },
659 { 0x13f6, "C-Media" },
660 { 0x14f1, "Conexant" },
661 { 0x17e8, "Chrontel" },
662 { 0x1854, "LG" },
663 { 0x19e5, "Huawei" },
664 { 0x1aec, "Wolfson Microelectronics" },
665 { 0x1af4, "QEMU" },
666 { 0x434d, "C-Media" },
667 { 0x8086, "Intel" },
668 { 0x8384, "SigmaTel" },
669 {} /* terminator */
670 };
671
672 /* store the codec vendor name */
get_codec_vendor_name(struct hdac_device * codec)673 static int get_codec_vendor_name(struct hdac_device *codec)
674 {
675 const struct hda_vendor_id *c;
676 u16 vendor_id = codec->vendor_id >> 16;
677
678 for (c = hda_vendor_ids; c->id; c++) {
679 if (c->id == vendor_id) {
680 codec->vendor_name = kstrdup(c->name, GFP_KERNEL);
681 return codec->vendor_name ? 0 : -ENOMEM;
682 }
683 }
684
685 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
686 return codec->vendor_name ? 0 : -ENOMEM;
687 }
688
689 /*
690 * stream formats
691 */
692 struct hda_rate_tbl {
693 unsigned int hz;
694 unsigned int alsa_bits;
695 unsigned int hda_fmt;
696 };
697
698 /* rate = base * mult / div */
699 #define HDA_RATE(base, mult, div) \
700 (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
701 (((div) - 1) << AC_FMT_DIV_SHIFT))
702
703 static const struct hda_rate_tbl rate_bits[] = {
704 /* rate in Hz, ALSA rate bitmask, HDA format value */
705
706 /* autodetected value used in snd_hda_query_supported_pcm */
707 { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) },
708 { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) },
709 { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) },
710 { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) },
711 { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) },
712 { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) },
713 { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) },
714 { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) },
715 { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) },
716 { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) },
717 { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) },
718 #define AC_PAR_PCM_RATE_BITS 11
719 /* up to bits 10, 384kHZ isn't supported properly */
720
721 /* not autodetected value */
722 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
723
724 { 0 } /* terminator */
725 };
726
727 /**
728 * snd_hdac_calc_stream_format - calculate the format bitset
729 * @rate: the sample rate
730 * @channels: the number of channels
731 * @format: the PCM format (SNDRV_PCM_FORMAT_XXX)
732 * @maxbps: the max. bps
733 * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant)
734 *
735 * Calculate the format bitset from the given rate, channels and th PCM format.
736 *
737 * Return zero if invalid.
738 */
snd_hdac_calc_stream_format(unsigned int rate,unsigned int channels,snd_pcm_format_t format,unsigned int maxbps,unsigned short spdif_ctls)739 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
740 unsigned int channels,
741 snd_pcm_format_t format,
742 unsigned int maxbps,
743 unsigned short spdif_ctls)
744 {
745 int i;
746 unsigned int val = 0;
747
748 for (i = 0; rate_bits[i].hz; i++)
749 if (rate_bits[i].hz == rate) {
750 val = rate_bits[i].hda_fmt;
751 break;
752 }
753 if (!rate_bits[i].hz)
754 return 0;
755
756 if (channels == 0 || channels > 8)
757 return 0;
758 val |= channels - 1;
759
760 switch (snd_pcm_format_width(format)) {
761 case 8:
762 val |= AC_FMT_BITS_8;
763 break;
764 case 16:
765 val |= AC_FMT_BITS_16;
766 break;
767 case 20:
768 case 24:
769 case 32:
770 if (maxbps >= 32 || format == SNDRV_PCM_FORMAT_FLOAT_LE)
771 val |= AC_FMT_BITS_32;
772 else if (maxbps >= 24)
773 val |= AC_FMT_BITS_24;
774 else
775 val |= AC_FMT_BITS_20;
776 break;
777 default:
778 return 0;
779 }
780
781 if (spdif_ctls & AC_DIG1_NONAUDIO)
782 val |= AC_FMT_TYPE_NON_PCM;
783
784 return val;
785 }
786 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
787
query_pcm_param(struct hdac_device * codec,hda_nid_t nid)788 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
789 {
790 unsigned int val = 0;
791
792 if (nid != codec->afg &&
793 (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD))
794 val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM);
795 if (!val || val == -1)
796 val = snd_hdac_read_parm(codec, codec->afg, AC_PAR_PCM);
797 if (!val || val == -1)
798 return 0;
799 return val;
800 }
801
query_stream_param(struct hdac_device * codec,hda_nid_t nid)802 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
803 {
804 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
805
806 if (!streams || streams == -1)
807 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
808 if (!streams || streams == -1)
809 return 0;
810 return streams;
811 }
812
813 /**
814 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
815 * @codec: the codec object
816 * @nid: NID to query
817 * @ratesp: the pointer to store the detected rate bitflags
818 * @formatsp: the pointer to store the detected formats
819 * @bpsp: the pointer to store the detected format widths
820 *
821 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp
822 * or @bsps argument is ignored.
823 *
824 * Returns 0 if successful, otherwise a negative error code.
825 */
snd_hdac_query_supported_pcm(struct hdac_device * codec,hda_nid_t nid,u32 * ratesp,u64 * formatsp,unsigned int * bpsp)826 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
827 u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
828 {
829 unsigned int i, val, wcaps;
830
831 wcaps = get_wcaps(codec, nid);
832 val = query_pcm_param(codec, nid);
833
834 if (ratesp) {
835 u32 rates = 0;
836 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
837 if (val & (1 << i))
838 rates |= rate_bits[i].alsa_bits;
839 }
840 if (rates == 0) {
841 dev_err(&codec->dev,
842 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
843 nid, val,
844 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
845 return -EIO;
846 }
847 *ratesp = rates;
848 }
849
850 if (formatsp || bpsp) {
851 u64 formats = 0;
852 unsigned int streams, bps;
853
854 streams = query_stream_param(codec, nid);
855 if (!streams)
856 return -EIO;
857
858 bps = 0;
859 if (streams & AC_SUPFMT_PCM) {
860 if (val & AC_SUPPCM_BITS_8) {
861 formats |= SNDRV_PCM_FMTBIT_U8;
862 bps = 8;
863 }
864 if (val & AC_SUPPCM_BITS_16) {
865 formats |= SNDRV_PCM_FMTBIT_S16_LE;
866 bps = 16;
867 }
868 if (wcaps & AC_WCAP_DIGITAL) {
869 if (val & AC_SUPPCM_BITS_32)
870 formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
871 if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24))
872 formats |= SNDRV_PCM_FMTBIT_S32_LE;
873 if (val & AC_SUPPCM_BITS_24)
874 bps = 24;
875 else if (val & AC_SUPPCM_BITS_20)
876 bps = 20;
877 } else if (val & (AC_SUPPCM_BITS_20|AC_SUPPCM_BITS_24|
878 AC_SUPPCM_BITS_32)) {
879 formats |= SNDRV_PCM_FMTBIT_S32_LE;
880 if (val & AC_SUPPCM_BITS_32)
881 bps = 32;
882 else if (val & AC_SUPPCM_BITS_24)
883 bps = 24;
884 else if (val & AC_SUPPCM_BITS_20)
885 bps = 20;
886 }
887 }
888 #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */
889 if (streams & AC_SUPFMT_FLOAT32) {
890 formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
891 if (!bps)
892 bps = 32;
893 }
894 #endif
895 if (streams == AC_SUPFMT_AC3) {
896 /* should be exclusive */
897 /* temporary hack: we have still no proper support
898 * for the direct AC3 stream...
899 */
900 formats |= SNDRV_PCM_FMTBIT_U8;
901 bps = 8;
902 }
903 if (formats == 0) {
904 dev_err(&codec->dev,
905 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
906 nid, val,
907 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
908 streams);
909 return -EIO;
910 }
911 if (formatsp)
912 *formatsp = formats;
913 if (bpsp)
914 *bpsp = bps;
915 }
916
917 return 0;
918 }
919 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
920
921 /**
922 * snd_hdac_is_supported_format - Check the validity of the format
923 * @codec: the codec object
924 * @nid: NID to check
925 * @format: the HD-audio format value to check
926 *
927 * Check whether the given node supports the format value.
928 *
929 * Returns true if supported, false if not.
930 */
snd_hdac_is_supported_format(struct hdac_device * codec,hda_nid_t nid,unsigned int format)931 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
932 unsigned int format)
933 {
934 int i;
935 unsigned int val = 0, rate, stream;
936
937 val = query_pcm_param(codec, nid);
938 if (!val)
939 return false;
940
941 rate = format & 0xff00;
942 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
943 if (rate_bits[i].hda_fmt == rate) {
944 if (val & (1 << i))
945 break;
946 return false;
947 }
948 if (i >= AC_PAR_PCM_RATE_BITS)
949 return false;
950
951 stream = query_stream_param(codec, nid);
952 if (!stream)
953 return false;
954
955 if (stream & AC_SUPFMT_PCM) {
956 switch (format & 0xf0) {
957 case 0x00:
958 if (!(val & AC_SUPPCM_BITS_8))
959 return false;
960 break;
961 case 0x10:
962 if (!(val & AC_SUPPCM_BITS_16))
963 return false;
964 break;
965 case 0x20:
966 if (!(val & AC_SUPPCM_BITS_20))
967 return false;
968 break;
969 case 0x30:
970 if (!(val & AC_SUPPCM_BITS_24))
971 return false;
972 break;
973 case 0x40:
974 if (!(val & AC_SUPPCM_BITS_32))
975 return false;
976 break;
977 default:
978 return false;
979 }
980 } else {
981 /* FIXME: check for float32 and AC3? */
982 }
983
984 return true;
985 }
986 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
987
codec_read(struct hdac_device * hdac,hda_nid_t nid,int flags,unsigned int verb,unsigned int parm)988 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
989 int flags, unsigned int verb, unsigned int parm)
990 {
991 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
992 unsigned int res;
993
994 if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
995 return -1;
996
997 return res;
998 }
999
codec_write(struct hdac_device * hdac,hda_nid_t nid,int flags,unsigned int verb,unsigned int parm)1000 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1001 int flags, unsigned int verb, unsigned int parm)
1002 {
1003 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1004
1005 return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
1006 }
1007
1008 /**
1009 * snd_hdac_codec_read - send a command and get the response
1010 * @hdac: the HDAC device
1011 * @nid: NID to send the command
1012 * @flags: optional bit flags
1013 * @verb: the verb to send
1014 * @parm: the parameter for the verb
1015 *
1016 * Send a single command and read the corresponding response.
1017 *
1018 * Returns the obtained response value, or -1 for an error.
1019 */
snd_hdac_codec_read(struct hdac_device * hdac,hda_nid_t nid,int flags,unsigned int verb,unsigned int parm)1020 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1021 int flags, unsigned int verb, unsigned int parm)
1022 {
1023 return codec_read(hdac, nid, flags, verb, parm);
1024 }
1025 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
1026
1027 /**
1028 * snd_hdac_codec_write - send a single command without waiting for response
1029 * @hdac: the HDAC device
1030 * @nid: NID to send the command
1031 * @flags: optional bit flags
1032 * @verb: the verb to send
1033 * @parm: the parameter for the verb
1034 *
1035 * Send a single command without waiting for response.
1036 *
1037 * Returns 0 if successful, or a negative error code.
1038 */
snd_hdac_codec_write(struct hdac_device * hdac,hda_nid_t nid,int flags,unsigned int verb,unsigned int parm)1039 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1040 int flags, unsigned int verb, unsigned int parm)
1041 {
1042 return codec_write(hdac, nid, flags, verb, parm);
1043 }
1044 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1045
1046 /**
1047 * snd_hdac_check_power_state - check whether the actual power state matches
1048 * with the target state
1049 *
1050 * @hdac: the HDAC device
1051 * @nid: NID to send the command
1052 * @target_state: target state to check for
1053 *
1054 * Return true if state matches, false if not
1055 */
snd_hdac_check_power_state(struct hdac_device * hdac,hda_nid_t nid,unsigned int target_state)1056 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1057 hda_nid_t nid, unsigned int target_state)
1058 {
1059 unsigned int state = codec_read(hdac, nid, 0,
1060 AC_VERB_GET_POWER_STATE, 0);
1061
1062 if (state & AC_PWRST_ERROR)
1063 return true;
1064 state = (state >> 4) & 0x0f;
1065 return (state == target_state);
1066 }
1067 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
1068 /**
1069 * snd_hdac_sync_power_state - wait until actual power state matches
1070 * with the target state
1071 *
1072 * @codec: the HDAC device
1073 * @nid: NID to send the command
1074 * @power_state: target power state to wait for
1075 *
1076 * Return power state or PS_ERROR if codec rejects GET verb.
1077 */
snd_hdac_sync_power_state(struct hdac_device * codec,hda_nid_t nid,unsigned int power_state)1078 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec,
1079 hda_nid_t nid, unsigned int power_state)
1080 {
1081 unsigned long end_time = jiffies + msecs_to_jiffies(500);
1082 unsigned int state, actual_state, count;
1083
1084 for (count = 0; count < 500; count++) {
1085 state = snd_hdac_codec_read(codec, nid, 0,
1086 AC_VERB_GET_POWER_STATE, 0);
1087 if (state & AC_PWRST_ERROR) {
1088 msleep(20);
1089 break;
1090 }
1091 actual_state = (state >> 4) & 0x0f;
1092 if (actual_state == power_state)
1093 break;
1094 if (time_after_eq(jiffies, end_time))
1095 break;
1096 /* wait until the codec reachs to the target state */
1097 msleep(1);
1098 }
1099 return state;
1100 }
1101 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state);
1102