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 <sound/pcm_params.h> |
17 | #include "local.h" |
18 | |
19 | static void setup_fg_nodes(struct hdac_device *codec); |
20 | static int get_codec_vendor_name(struct hdac_device *codec); |
21 | |
22 | static void default_release(struct device *dev) |
23 | { |
24 | snd_hdac_device_exit(dev_to_hdac_dev(dev)); |
25 | } |
26 | |
27 | /** |
28 | * snd_hdac_device_init - initialize the HD-audio codec base device |
29 | * @codec: device to initialize |
30 | * @bus: but to attach |
31 | * @name: device name string |
32 | * @addr: codec address |
33 | * |
34 | * Returns zero for success or a negative error code. |
35 | * |
36 | * This function increments the runtime PM counter and marks it active. |
37 | * The caller needs to turn it off appropriately later. |
38 | * |
39 | * The caller needs to set the device's release op properly by itself. |
40 | */ |
41 | int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus, |
42 | const char *name, unsigned int addr) |
43 | { |
44 | struct device *dev; |
45 | hda_nid_t fg; |
46 | int err; |
47 | |
48 | dev = &codec->dev; |
49 | device_initialize(dev); |
50 | dev->parent = bus->dev; |
51 | dev->bus = &snd_hda_bus_type; |
52 | dev->release = default_release; |
53 | dev->groups = hdac_dev_attr_groups; |
54 | dev_set_name(dev, name: "%s" , name); |
55 | device_enable_async_suspend(dev); |
56 | |
57 | codec->bus = bus; |
58 | codec->addr = addr; |
59 | codec->type = HDA_DEV_CORE; |
60 | mutex_init(&codec->widget_lock); |
61 | mutex_init(&codec->regmap_lock); |
62 | pm_runtime_set_active(dev: &codec->dev); |
63 | pm_runtime_get_noresume(dev: &codec->dev); |
64 | atomic_set(v: &codec->in_pm, i: 0); |
65 | |
66 | err = snd_hdac_bus_add_device(bus, codec); |
67 | if (err < 0) |
68 | goto error; |
69 | |
70 | /* fill parameters */ |
71 | codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, |
72 | AC_PAR_VENDOR_ID); |
73 | if (codec->vendor_id == -1) { |
74 | /* read again, hopefully the access method was corrected |
75 | * in the last read... |
76 | */ |
77 | codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, |
78 | AC_PAR_VENDOR_ID); |
79 | } |
80 | |
81 | codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, |
82 | AC_PAR_SUBSYSTEM_ID); |
83 | codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT, |
84 | AC_PAR_REV_ID); |
85 | |
86 | setup_fg_nodes(codec); |
87 | if (!codec->afg && !codec->mfg) { |
88 | dev_err(dev, "no AFG or MFG node found\n" ); |
89 | err = -ENODEV; |
90 | goto error; |
91 | } |
92 | |
93 | fg = codec->afg ? codec->afg : codec->mfg; |
94 | |
95 | err = snd_hdac_refresh_widgets(codec); |
96 | if (err < 0) |
97 | goto error; |
98 | |
99 | codec->power_caps = snd_hdac_read_parm(codec, nid: fg, AC_PAR_POWER_STATE); |
100 | /* reread ssid if not set by parameter */ |
101 | if (codec->subsystem_id == -1 || codec->subsystem_id == 0) |
102 | snd_hdac_read(codec, nid: fg, AC_VERB_GET_SUBSYSTEM_ID, parm: 0, |
103 | res: &codec->subsystem_id); |
104 | |
105 | err = get_codec_vendor_name(codec); |
106 | if (err < 0) |
107 | goto error; |
108 | |
109 | codec->chip_name = kasprintf(GFP_KERNEL, fmt: "ID %x" , |
110 | codec->vendor_id & 0xffff); |
111 | if (!codec->chip_name) { |
112 | err = -ENOMEM; |
113 | goto error; |
114 | } |
115 | |
116 | return 0; |
117 | |
118 | error: |
119 | put_device(dev: &codec->dev); |
120 | return err; |
121 | } |
122 | EXPORT_SYMBOL_GPL(snd_hdac_device_init); |
123 | |
124 | /** |
125 | * snd_hdac_device_exit - clean up the HD-audio codec base device |
126 | * @codec: device to clean up |
127 | */ |
128 | void snd_hdac_device_exit(struct hdac_device *codec) |
129 | { |
130 | pm_runtime_put_noidle(dev: &codec->dev); |
131 | /* keep balance of runtime PM child_count in parent device */ |
132 | pm_runtime_set_suspended(dev: &codec->dev); |
133 | snd_hdac_bus_remove_device(bus: codec->bus, codec); |
134 | kfree(objp: codec->vendor_name); |
135 | kfree(objp: codec->chip_name); |
136 | } |
137 | EXPORT_SYMBOL_GPL(snd_hdac_device_exit); |
138 | |
139 | /** |
140 | * snd_hdac_device_register - register the hd-audio codec base device |
141 | * @codec: the device to register |
142 | */ |
143 | int snd_hdac_device_register(struct hdac_device *codec) |
144 | { |
145 | int err; |
146 | |
147 | err = device_add(dev: &codec->dev); |
148 | if (err < 0) |
149 | return err; |
150 | mutex_lock(&codec->widget_lock); |
151 | err = hda_widget_sysfs_init(codec); |
152 | mutex_unlock(lock: &codec->widget_lock); |
153 | if (err < 0) { |
154 | device_del(dev: &codec->dev); |
155 | return err; |
156 | } |
157 | |
158 | return 0; |
159 | } |
160 | EXPORT_SYMBOL_GPL(snd_hdac_device_register); |
161 | |
162 | /** |
163 | * snd_hdac_device_unregister - unregister the hd-audio codec base device |
164 | * @codec: the device to unregister |
165 | */ |
166 | void snd_hdac_device_unregister(struct hdac_device *codec) |
167 | { |
168 | if (device_is_registered(dev: &codec->dev)) { |
169 | mutex_lock(&codec->widget_lock); |
170 | hda_widget_sysfs_exit(codec); |
171 | mutex_unlock(lock: &codec->widget_lock); |
172 | device_del(dev: &codec->dev); |
173 | snd_hdac_bus_remove_device(bus: codec->bus, codec); |
174 | } |
175 | } |
176 | EXPORT_SYMBOL_GPL(snd_hdac_device_unregister); |
177 | |
178 | /** |
179 | * snd_hdac_device_set_chip_name - set/update the codec name |
180 | * @codec: the HDAC device |
181 | * @name: name string to set |
182 | * |
183 | * Returns 0 if the name is set or updated, or a negative error code. |
184 | */ |
185 | int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name) |
186 | { |
187 | char *newname; |
188 | |
189 | if (!name) |
190 | return 0; |
191 | newname = kstrdup(s: name, GFP_KERNEL); |
192 | if (!newname) |
193 | return -ENOMEM; |
194 | kfree(objp: codec->chip_name); |
195 | codec->chip_name = newname; |
196 | return 0; |
197 | } |
198 | EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name); |
199 | |
200 | /** |
201 | * snd_hdac_codec_modalias - give the module alias name |
202 | * @codec: HDAC device |
203 | * @buf: string buffer to store |
204 | * @size: string buffer size |
205 | * |
206 | * Returns the size of string, like snprintf(), or a negative error code. |
207 | */ |
208 | int snd_hdac_codec_modalias(const struct hdac_device *codec, char *buf, size_t size) |
209 | { |
210 | return scnprintf(buf, size, fmt: "hdaudio:v%08Xr%08Xa%02X\n" , |
211 | codec->vendor_id, codec->revision_id, codec->type); |
212 | } |
213 | EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias); |
214 | |
215 | /** |
216 | * snd_hdac_make_cmd - compose a 32bit command word to be sent to the |
217 | * HD-audio controller |
218 | * @codec: the codec object |
219 | * @nid: NID to encode |
220 | * @verb: verb to encode |
221 | * @parm: parameter to encode |
222 | * |
223 | * Return an encoded command verb or -1 for error. |
224 | */ |
225 | static unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid, |
226 | unsigned int verb, unsigned int parm) |
227 | { |
228 | u32 val, addr; |
229 | |
230 | addr = codec->addr; |
231 | if ((addr & ~0xf) || (nid & ~0x7f) || |
232 | (verb & ~0xfff) || (parm & ~0xffff)) { |
233 | dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n" , |
234 | addr, nid, verb, parm); |
235 | return -1; |
236 | } |
237 | |
238 | val = addr << 28; |
239 | val |= (u32)nid << 20; |
240 | val |= verb << 8; |
241 | val |= parm; |
242 | return val; |
243 | } |
244 | |
245 | /** |
246 | * snd_hdac_exec_verb - execute an encoded verb |
247 | * @codec: the codec object |
248 | * @cmd: encoded verb to execute |
249 | * @flags: optional flags, pass zero for default |
250 | * @res: the pointer to store the result, NULL if running async |
251 | * |
252 | * Returns zero if successful, or a negative error code. |
253 | * |
254 | * This calls the exec_verb op when set in hdac_codec. If not, |
255 | * call the default snd_hdac_bus_exec_verb(). |
256 | */ |
257 | int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd, |
258 | unsigned int flags, unsigned int *res) |
259 | { |
260 | if (codec->exec_verb) |
261 | return codec->exec_verb(codec, cmd, flags, res); |
262 | return snd_hdac_bus_exec_verb(bus: codec->bus, addr: codec->addr, cmd, res); |
263 | } |
264 | |
265 | |
266 | /** |
267 | * snd_hdac_read - execute a verb |
268 | * @codec: the codec object |
269 | * @nid: NID to execute a verb |
270 | * @verb: verb to execute |
271 | * @parm: parameter for a verb |
272 | * @res: the pointer to store the result, NULL if running async |
273 | * |
274 | * Returns zero if successful, or a negative error code. |
275 | */ |
276 | int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, |
277 | unsigned int verb, unsigned int parm, unsigned int *res) |
278 | { |
279 | unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm); |
280 | |
281 | return snd_hdac_exec_verb(codec, cmd, flags: 0, res); |
282 | } |
283 | EXPORT_SYMBOL_GPL(snd_hdac_read); |
284 | |
285 | /** |
286 | * _snd_hdac_read_parm - read a parmeter |
287 | * @codec: the codec object |
288 | * @nid: NID to read a parameter |
289 | * @parm: parameter to read |
290 | * @res: pointer to store the read value |
291 | * |
292 | * This function returns zero or an error unlike snd_hdac_read_parm(). |
293 | */ |
294 | int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm, |
295 | unsigned int *res) |
296 | { |
297 | unsigned int cmd; |
298 | |
299 | cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; |
300 | return snd_hdac_regmap_read_raw(codec, reg: cmd, val: res); |
301 | } |
302 | EXPORT_SYMBOL_GPL(_snd_hdac_read_parm); |
303 | |
304 | /** |
305 | * snd_hdac_read_parm_uncached - read a codec parameter without caching |
306 | * @codec: the codec object |
307 | * @nid: NID to read a parameter |
308 | * @parm: parameter to read |
309 | * |
310 | * Returns -1 for error. If you need to distinguish the error more |
311 | * strictly, use snd_hdac_read() directly. |
312 | */ |
313 | int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid, |
314 | int parm) |
315 | { |
316 | unsigned int cmd, val; |
317 | |
318 | cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm; |
319 | if (snd_hdac_regmap_read_raw_uncached(codec, reg: cmd, val: &val) < 0) |
320 | return -1; |
321 | return val; |
322 | } |
323 | EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached); |
324 | |
325 | /** |
326 | * snd_hdac_override_parm - override read-only parameters |
327 | * @codec: the codec object |
328 | * @nid: NID for the parameter |
329 | * @parm: the parameter to change |
330 | * @val: the parameter value to overwrite |
331 | */ |
332 | int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid, |
333 | unsigned int parm, unsigned int val) |
334 | { |
335 | unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm; |
336 | int err; |
337 | |
338 | if (!codec->regmap) |
339 | return -EINVAL; |
340 | |
341 | codec->caps_overwriting = true; |
342 | err = snd_hdac_regmap_write_raw(codec, reg: verb, val); |
343 | codec->caps_overwriting = false; |
344 | return err; |
345 | } |
346 | EXPORT_SYMBOL_GPL(snd_hdac_override_parm); |
347 | |
348 | /** |
349 | * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes |
350 | * @codec: the codec object |
351 | * @nid: NID to inspect |
352 | * @start_id: the pointer to store the starting NID |
353 | * |
354 | * Returns the number of subtree nodes or zero if not found. |
355 | * This function reads parameters always without caching. |
356 | */ |
357 | int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, |
358 | hda_nid_t *start_id) |
359 | { |
360 | unsigned int parm; |
361 | |
362 | parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT); |
363 | if (parm == -1) { |
364 | *start_id = 0; |
365 | return 0; |
366 | } |
367 | *start_id = (parm >> 16) & 0x7fff; |
368 | return (int)(parm & 0x7fff); |
369 | } |
370 | EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes); |
371 | |
372 | /* |
373 | * look for an AFG and MFG nodes |
374 | */ |
375 | static void setup_fg_nodes(struct hdac_device *codec) |
376 | { |
377 | int i, total_nodes, function_id; |
378 | hda_nid_t nid; |
379 | |
380 | total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid); |
381 | for (i = 0; i < total_nodes; i++, nid++) { |
382 | function_id = snd_hdac_read_parm(codec, nid, |
383 | AC_PAR_FUNCTION_TYPE); |
384 | switch (function_id & 0xff) { |
385 | case AC_GRP_AUDIO_FUNCTION: |
386 | codec->afg = nid; |
387 | codec->afg_function_id = function_id & 0xff; |
388 | codec->afg_unsol = (function_id >> 8) & 1; |
389 | break; |
390 | case AC_GRP_MODEM_FUNCTION: |
391 | codec->mfg = nid; |
392 | codec->mfg_function_id = function_id & 0xff; |
393 | codec->mfg_unsol = (function_id >> 8) & 1; |
394 | break; |
395 | default: |
396 | break; |
397 | } |
398 | } |
399 | } |
400 | |
401 | /** |
402 | * snd_hdac_refresh_widgets - Reset the widget start/end nodes |
403 | * @codec: the codec object |
404 | */ |
405 | int snd_hdac_refresh_widgets(struct hdac_device *codec) |
406 | { |
407 | hda_nid_t start_nid; |
408 | int nums, err = 0; |
409 | |
410 | /* |
411 | * Serialize against multiple threads trying to update the sysfs |
412 | * widgets array. |
413 | */ |
414 | mutex_lock(&codec->widget_lock); |
415 | nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid); |
416 | if (!start_nid || nums <= 0 || nums >= 0xff) { |
417 | dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n" , |
418 | codec->afg); |
419 | err = -EINVAL; |
420 | goto unlock; |
421 | } |
422 | |
423 | err = hda_widget_sysfs_reinit(codec, start_nid, num_nodes: nums); |
424 | if (err < 0) |
425 | goto unlock; |
426 | |
427 | codec->num_nodes = nums; |
428 | codec->start_nid = start_nid; |
429 | codec->end_nid = start_nid + nums; |
430 | unlock: |
431 | mutex_unlock(lock: &codec->widget_lock); |
432 | return err; |
433 | } |
434 | EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets); |
435 | |
436 | /* return CONNLIST_LEN parameter of the given widget */ |
437 | static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid) |
438 | { |
439 | unsigned int wcaps = get_wcaps(codec, nid); |
440 | unsigned int parm; |
441 | |
442 | if (!(wcaps & AC_WCAP_CONN_LIST) && |
443 | get_wcaps_type(wcaps) != AC_WID_VOL_KNB) |
444 | return 0; |
445 | |
446 | parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN); |
447 | if (parm == -1) |
448 | parm = 0; |
449 | return parm; |
450 | } |
451 | |
452 | /** |
453 | * snd_hdac_get_connections - get a widget connection list |
454 | * @codec: the codec object |
455 | * @nid: NID |
456 | * @conn_list: the array to store the results, can be NULL |
457 | * @max_conns: the max size of the given array |
458 | * |
459 | * Returns the number of connected widgets, zero for no connection, or a |
460 | * negative error code. When the number of elements don't fit with the |
461 | * given array size, it returns -ENOSPC. |
462 | * |
463 | * When @conn_list is NULL, it just checks the number of connections. |
464 | */ |
465 | int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, |
466 | hda_nid_t *conn_list, int max_conns) |
467 | { |
468 | unsigned int parm; |
469 | int i, conn_len, conns, err; |
470 | unsigned int shift, num_elems, mask; |
471 | hda_nid_t prev_nid; |
472 | int null_count = 0; |
473 | |
474 | parm = get_num_conns(codec, nid); |
475 | if (!parm) |
476 | return 0; |
477 | |
478 | if (parm & AC_CLIST_LONG) { |
479 | /* long form */ |
480 | shift = 16; |
481 | num_elems = 2; |
482 | } else { |
483 | /* short form */ |
484 | shift = 8; |
485 | num_elems = 4; |
486 | } |
487 | conn_len = parm & AC_CLIST_LENGTH; |
488 | mask = (1 << (shift-1)) - 1; |
489 | |
490 | if (!conn_len) |
491 | return 0; /* no connection */ |
492 | |
493 | if (conn_len == 1) { |
494 | /* single connection */ |
495 | err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0, |
496 | &parm); |
497 | if (err < 0) |
498 | return err; |
499 | if (conn_list) |
500 | conn_list[0] = parm & mask; |
501 | return 1; |
502 | } |
503 | |
504 | /* multi connection */ |
505 | conns = 0; |
506 | prev_nid = 0; |
507 | for (i = 0; i < conn_len; i++) { |
508 | int range_val; |
509 | hda_nid_t val, n; |
510 | |
511 | if (i % num_elems == 0) { |
512 | err = snd_hdac_read(codec, nid, |
513 | AC_VERB_GET_CONNECT_LIST, i, |
514 | &parm); |
515 | if (err < 0) |
516 | return -EIO; |
517 | } |
518 | range_val = !!(parm & (1 << (shift-1))); /* ranges */ |
519 | val = parm & mask; |
520 | if (val == 0 && null_count++) { /* no second chance */ |
521 | dev_dbg(&codec->dev, |
522 | "invalid CONNECT_LIST verb %x[%i]:%x\n" , |
523 | nid, i, parm); |
524 | return 0; |
525 | } |
526 | parm >>= shift; |
527 | if (range_val) { |
528 | /* ranges between the previous and this one */ |
529 | if (!prev_nid || prev_nid >= val) { |
530 | dev_warn(&codec->dev, |
531 | "invalid dep_range_val %x:%x\n" , |
532 | prev_nid, val); |
533 | continue; |
534 | } |
535 | for (n = prev_nid + 1; n <= val; n++) { |
536 | if (conn_list) { |
537 | if (conns >= max_conns) |
538 | return -ENOSPC; |
539 | conn_list[conns] = n; |
540 | } |
541 | conns++; |
542 | } |
543 | } else { |
544 | if (conn_list) { |
545 | if (conns >= max_conns) |
546 | return -ENOSPC; |
547 | conn_list[conns] = val; |
548 | } |
549 | conns++; |
550 | } |
551 | prev_nid = val; |
552 | } |
553 | return conns; |
554 | } |
555 | EXPORT_SYMBOL_GPL(snd_hdac_get_connections); |
556 | |
557 | #ifdef CONFIG_PM |
558 | /** |
559 | * snd_hdac_power_up - power up the codec |
560 | * @codec: the codec object |
561 | * |
562 | * This function calls the runtime PM helper to power up the given codec. |
563 | * Unlike snd_hdac_power_up_pm(), you should call this only for the code |
564 | * path that isn't included in PM path. Otherwise it gets stuck. |
565 | * |
566 | * Returns zero if successful, or a negative error code. |
567 | */ |
568 | int snd_hdac_power_up(struct hdac_device *codec) |
569 | { |
570 | return pm_runtime_get_sync(dev: &codec->dev); |
571 | } |
572 | EXPORT_SYMBOL_GPL(snd_hdac_power_up); |
573 | |
574 | /** |
575 | * snd_hdac_power_down - power down the codec |
576 | * @codec: the codec object |
577 | * |
578 | * Returns zero if successful, or a negative error code. |
579 | */ |
580 | int snd_hdac_power_down(struct hdac_device *codec) |
581 | { |
582 | struct device *dev = &codec->dev; |
583 | |
584 | pm_runtime_mark_last_busy(dev); |
585 | return pm_runtime_put_autosuspend(dev); |
586 | } |
587 | EXPORT_SYMBOL_GPL(snd_hdac_power_down); |
588 | |
589 | /** |
590 | * snd_hdac_power_up_pm - power up the codec |
591 | * @codec: the codec object |
592 | * |
593 | * This function can be called in a recursive code path like init code |
594 | * which may be called by PM suspend/resume again. OTOH, if a power-up |
595 | * call must wake up the sleeper (e.g. in a kctl callback), use |
596 | * snd_hdac_power_up() instead. |
597 | * |
598 | * Returns zero if successful, or a negative error code. |
599 | */ |
600 | int snd_hdac_power_up_pm(struct hdac_device *codec) |
601 | { |
602 | if (!atomic_inc_not_zero(v: &codec->in_pm)) |
603 | return snd_hdac_power_up(codec); |
604 | return 0; |
605 | } |
606 | EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm); |
607 | |
608 | /* like snd_hdac_power_up_pm(), but only increment the pm count when |
609 | * already powered up. Returns -1 if not powered up, 1 if incremented |
610 | * or 0 if unchanged. Only used in hdac_regmap.c |
611 | */ |
612 | int snd_hdac_keep_power_up(struct hdac_device *codec) |
613 | { |
614 | if (!atomic_inc_not_zero(v: &codec->in_pm)) { |
615 | int ret = pm_runtime_get_if_active(dev: &codec->dev); |
616 | if (!ret) |
617 | return -1; |
618 | if (ret < 0) |
619 | return 0; |
620 | } |
621 | return 1; |
622 | } |
623 | |
624 | /** |
625 | * snd_hdac_power_down_pm - power down the codec |
626 | * @codec: the codec object |
627 | * |
628 | * Like snd_hdac_power_up_pm(), this function is used in a recursive |
629 | * code path like init code which may be called by PM suspend/resume again. |
630 | * |
631 | * Returns zero if successful, or a negative error code. |
632 | */ |
633 | int snd_hdac_power_down_pm(struct hdac_device *codec) |
634 | { |
635 | if (atomic_dec_if_positive(v: &codec->in_pm) < 0) |
636 | return snd_hdac_power_down(codec); |
637 | return 0; |
638 | } |
639 | EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); |
640 | #endif |
641 | |
642 | /* codec vendor labels */ |
643 | struct hda_vendor_id { |
644 | unsigned int id; |
645 | const char *name; |
646 | }; |
647 | |
648 | static const struct hda_vendor_id hda_vendor_ids[] = { |
649 | { 0x0014, "Loongson" }, |
650 | { 0x1002, "ATI" }, |
651 | { 0x1013, "Cirrus Logic" }, |
652 | { 0x1057, "Motorola" }, |
653 | { 0x1095, "Silicon Image" }, |
654 | { 0x10de, "Nvidia" }, |
655 | { 0x10ec, "Realtek" }, |
656 | { 0x1102, "Creative" }, |
657 | { 0x1106, "VIA" }, |
658 | { 0x111d, "IDT" }, |
659 | { 0x11c1, "LSI" }, |
660 | { 0x11d4, "Analog Devices" }, |
661 | { 0x13f6, "C-Media" }, |
662 | { 0x14f1, "Conexant" }, |
663 | { 0x17e8, "Chrontel" }, |
664 | { 0x1854, "LG" }, |
665 | { 0x19e5, "Huawei" }, |
666 | { 0x1aec, "Wolfson Microelectronics" }, |
667 | { 0x1af4, "QEMU" }, |
668 | { 0x434d, "C-Media" }, |
669 | { 0x8086, "Intel" }, |
670 | { 0x8384, "SigmaTel" }, |
671 | {} /* terminator */ |
672 | }; |
673 | |
674 | /* store the codec vendor name */ |
675 | static int get_codec_vendor_name(struct hdac_device *codec) |
676 | { |
677 | const struct hda_vendor_id *c; |
678 | u16 vendor_id = codec->vendor_id >> 16; |
679 | |
680 | for (c = hda_vendor_ids; c->id; c++) { |
681 | if (c->id == vendor_id) { |
682 | codec->vendor_name = kstrdup(s: c->name, GFP_KERNEL); |
683 | return codec->vendor_name ? 0 : -ENOMEM; |
684 | } |
685 | } |
686 | |
687 | codec->vendor_name = kasprintf(GFP_KERNEL, fmt: "Generic %04x" , vendor_id); |
688 | return codec->vendor_name ? 0 : -ENOMEM; |
689 | } |
690 | |
691 | /* |
692 | * stream formats |
693 | */ |
694 | struct hda_rate_tbl { |
695 | unsigned int hz; |
696 | unsigned int alsa_bits; |
697 | unsigned int hda_fmt; |
698 | }; |
699 | |
700 | /* rate = base * mult / div */ |
701 | #define HDA_RATE(base, mult, div) \ |
702 | (AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \ |
703 | (((div) - 1) << AC_FMT_DIV_SHIFT)) |
704 | |
705 | static const struct hda_rate_tbl rate_bits[] = { |
706 | /* rate in Hz, ALSA rate bitmask, HDA format value */ |
707 | |
708 | /* autodetected value used in snd_hda_query_supported_pcm */ |
709 | { 8000, SNDRV_PCM_RATE_8000, HDA_RATE(48, 1, 6) }, |
710 | { 11025, SNDRV_PCM_RATE_11025, HDA_RATE(44, 1, 4) }, |
711 | { 16000, SNDRV_PCM_RATE_16000, HDA_RATE(48, 1, 3) }, |
712 | { 22050, SNDRV_PCM_RATE_22050, HDA_RATE(44, 1, 2) }, |
713 | { 32000, SNDRV_PCM_RATE_32000, HDA_RATE(48, 2, 3) }, |
714 | { 44100, SNDRV_PCM_RATE_44100, HDA_RATE(44, 1, 1) }, |
715 | { 48000, SNDRV_PCM_RATE_48000, HDA_RATE(48, 1, 1) }, |
716 | { 88200, SNDRV_PCM_RATE_88200, HDA_RATE(44, 2, 1) }, |
717 | { 96000, SNDRV_PCM_RATE_96000, HDA_RATE(48, 2, 1) }, |
718 | { 176400, SNDRV_PCM_RATE_176400, HDA_RATE(44, 4, 1) }, |
719 | { 192000, SNDRV_PCM_RATE_192000, HDA_RATE(48, 4, 1) }, |
720 | #define AC_PAR_PCM_RATE_BITS 11 |
721 | /* up to bits 10, 384kHZ isn't supported properly */ |
722 | |
723 | /* not autodetected value */ |
724 | { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) }, |
725 | |
726 | { 0 } /* terminator */ |
727 | }; |
728 | |
729 | static snd_pcm_format_t snd_hdac_format_normalize(snd_pcm_format_t format) |
730 | { |
731 | switch (format) { |
732 | case SNDRV_PCM_FORMAT_S20_LE: |
733 | case SNDRV_PCM_FORMAT_S24_LE: |
734 | return SNDRV_PCM_FORMAT_S32_LE; |
735 | |
736 | case SNDRV_PCM_FORMAT_U20_LE: |
737 | case SNDRV_PCM_FORMAT_U24_LE: |
738 | return SNDRV_PCM_FORMAT_U32_LE; |
739 | |
740 | case SNDRV_PCM_FORMAT_S20_BE: |
741 | case SNDRV_PCM_FORMAT_S24_BE: |
742 | return SNDRV_PCM_FORMAT_S32_BE; |
743 | |
744 | case SNDRV_PCM_FORMAT_U20_BE: |
745 | case SNDRV_PCM_FORMAT_U24_BE: |
746 | return SNDRV_PCM_FORMAT_U32_BE; |
747 | |
748 | default: |
749 | return format; |
750 | } |
751 | } |
752 | |
753 | /** |
754 | * snd_hdac_stream_format_bits - obtain bits per sample value. |
755 | * @format: the PCM format. |
756 | * @subformat: the PCM subformat. |
757 | * @maxbits: the maximum bits per sample. |
758 | * |
759 | * Return: The number of bits per sample. |
760 | */ |
761 | unsigned int snd_hdac_stream_format_bits(snd_pcm_format_t format, snd_pcm_subformat_t subformat, |
762 | unsigned int maxbits) |
763 | { |
764 | struct snd_pcm_hw_params params; |
765 | unsigned int bits; |
766 | |
767 | memset(¶ms, 0, sizeof(params)); |
768 | |
769 | params_set_format(p: ¶ms, fmt: snd_hdac_format_normalize(format)); |
770 | snd_mask_set(mask: hw_param_mask(params: ¶ms, SNDRV_PCM_HW_PARAM_SUBFORMAT), |
771 | val: (__force unsigned int)subformat); |
772 | |
773 | bits = snd_pcm_hw_params_bits(p: ¶ms); |
774 | if (maxbits) |
775 | return min(bits, maxbits); |
776 | return bits; |
777 | } |
778 | EXPORT_SYMBOL_GPL(snd_hdac_stream_format_bits); |
779 | |
780 | /** |
781 | * snd_hdac_stream_format - convert format parameters to SDxFMT value. |
782 | * @channels: the number of channels. |
783 | * @bits: bits per sample. |
784 | * @rate: the sample rate. |
785 | * |
786 | * Return: The format bitset or zero if invalid. |
787 | */ |
788 | unsigned int snd_hdac_stream_format(unsigned int channels, unsigned int bits, unsigned int rate) |
789 | { |
790 | unsigned int val = 0; |
791 | int i; |
792 | |
793 | for (i = 0; rate_bits[i].hz; i++) { |
794 | if (rate_bits[i].hz == rate) { |
795 | val = rate_bits[i].hda_fmt; |
796 | break; |
797 | } |
798 | } |
799 | |
800 | if (!rate_bits[i].hz) |
801 | return 0; |
802 | |
803 | if (channels == 0 || channels > 8) |
804 | return 0; |
805 | val |= channels - 1; |
806 | |
807 | switch (bits) { |
808 | case 8: |
809 | val |= AC_FMT_BITS_8; |
810 | break; |
811 | case 16: |
812 | val |= AC_FMT_BITS_16; |
813 | break; |
814 | case 20: |
815 | val |= AC_FMT_BITS_20; |
816 | break; |
817 | case 24: |
818 | val |= AC_FMT_BITS_24; |
819 | break; |
820 | case 32: |
821 | val |= AC_FMT_BITS_32; |
822 | break; |
823 | default: |
824 | return 0; |
825 | } |
826 | |
827 | return val; |
828 | } |
829 | EXPORT_SYMBOL_GPL(snd_hdac_stream_format); |
830 | |
831 | /** |
832 | * snd_hdac_spdif_stream_format - convert format parameters to SDxFMT value. |
833 | * @channels: the number of channels. |
834 | * @bits: bits per sample. |
835 | * @rate: the sample rate. |
836 | * @spdif_ctls: HD-audio SPDIF status bits (0 if irrelevant). |
837 | * |
838 | * Return: The format bitset or zero if invalid. |
839 | */ |
840 | unsigned int snd_hdac_spdif_stream_format(unsigned int channels, unsigned int bits, |
841 | unsigned int rate, unsigned short spdif_ctls) |
842 | { |
843 | unsigned int val = snd_hdac_stream_format(channels, bits, rate); |
844 | |
845 | if (val && spdif_ctls & AC_DIG1_NONAUDIO) |
846 | val |= AC_FMT_TYPE_NON_PCM; |
847 | |
848 | return val; |
849 | } |
850 | EXPORT_SYMBOL_GPL(snd_hdac_spdif_stream_format); |
851 | |
852 | static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid) |
853 | { |
854 | unsigned int val = 0; |
855 | |
856 | if (nid != codec->afg && |
857 | (get_wcaps(codec, nid) & AC_WCAP_FORMAT_OVRD)) |
858 | val = snd_hdac_read_parm(codec, nid, AC_PAR_PCM); |
859 | if (!val || val == -1) |
860 | val = snd_hdac_read_parm(codec, nid: codec->afg, AC_PAR_PCM); |
861 | if (!val || val == -1) |
862 | return 0; |
863 | return val; |
864 | } |
865 | |
866 | static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid) |
867 | { |
868 | unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM); |
869 | |
870 | if (!streams || streams == -1) |
871 | streams = snd_hdac_read_parm(codec, nid: codec->afg, AC_PAR_STREAM); |
872 | if (!streams || streams == -1) |
873 | return 0; |
874 | return streams; |
875 | } |
876 | |
877 | /** |
878 | * snd_hdac_query_supported_pcm - query the supported PCM rates and formats |
879 | * @codec: the codec object |
880 | * @nid: NID to query |
881 | * @ratesp: the pointer to store the detected rate bitflags |
882 | * @formatsp: the pointer to store the detected formats |
883 | * @subformatsp: the pointer to store the detected subformats for S32_LE format |
884 | * @bpsp: the pointer to store the detected format widths |
885 | * |
886 | * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp, |
887 | * @subformatsp or @bpsp argument is ignored. |
888 | * |
889 | * Returns 0 if successful, otherwise a negative error code. |
890 | */ |
891 | int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid, |
892 | u32 *ratesp, u64 *formatsp, u32 *subformatsp, |
893 | unsigned int *bpsp) |
894 | { |
895 | unsigned int i, val, wcaps; |
896 | |
897 | wcaps = get_wcaps(codec, nid); |
898 | val = query_pcm_param(codec, nid); |
899 | |
900 | if (ratesp) { |
901 | u32 rates = 0; |
902 | for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) { |
903 | if (val & (1 << i)) |
904 | rates |= rate_bits[i].alsa_bits; |
905 | } |
906 | if (rates == 0) { |
907 | dev_err(&codec->dev, |
908 | "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n" , |
909 | nid, val, |
910 | (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0); |
911 | return -EIO; |
912 | } |
913 | *ratesp = rates; |
914 | } |
915 | |
916 | if (formatsp || subformatsp || bpsp) { |
917 | unsigned int streams, bps; |
918 | u32 subformats = 0; |
919 | u64 formats = 0; |
920 | |
921 | streams = query_stream_param(codec, nid); |
922 | if (!streams) |
923 | return -EIO; |
924 | |
925 | bps = 0; |
926 | if (streams & AC_SUPFMT_PCM) { |
927 | if (val & AC_SUPPCM_BITS_8) { |
928 | formats |= SNDRV_PCM_FMTBIT_U8; |
929 | bps = 8; |
930 | } |
931 | if (val & AC_SUPPCM_BITS_16) { |
932 | formats |= SNDRV_PCM_FMTBIT_S16_LE; |
933 | bps = 16; |
934 | } |
935 | if (val & AC_SUPPCM_BITS_20) { |
936 | formats |= SNDRV_PCM_FMTBIT_S32_LE; |
937 | subformats |= SNDRV_PCM_SUBFMTBIT_MSBITS_20; |
938 | bps = 20; |
939 | } |
940 | if (val & AC_SUPPCM_BITS_24) { |
941 | formats |= SNDRV_PCM_FMTBIT_S32_LE; |
942 | subformats |= SNDRV_PCM_SUBFMTBIT_MSBITS_24; |
943 | bps = 24; |
944 | } |
945 | if (val & AC_SUPPCM_BITS_32) { |
946 | if (wcaps & AC_WCAP_DIGITAL) { |
947 | formats |= SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE; |
948 | } else { |
949 | formats |= SNDRV_PCM_FMTBIT_S32_LE; |
950 | subformats |= SNDRV_PCM_SUBFMTBIT_MSBITS_MAX; |
951 | bps = 32; |
952 | } |
953 | } |
954 | } |
955 | #if 0 /* FIXME: CS4206 doesn't work, which is the only codec supporting float */ |
956 | if (streams & AC_SUPFMT_FLOAT32) { |
957 | formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; |
958 | if (!bps) |
959 | bps = 32; |
960 | } |
961 | #endif |
962 | if (streams == AC_SUPFMT_AC3) { |
963 | /* should be exclusive */ |
964 | /* temporary hack: we have still no proper support |
965 | * for the direct AC3 stream... |
966 | */ |
967 | formats |= SNDRV_PCM_FMTBIT_U8; |
968 | bps = 8; |
969 | } |
970 | if (formats == 0) { |
971 | dev_err(&codec->dev, |
972 | "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n" , |
973 | nid, val, |
974 | (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0, |
975 | streams); |
976 | return -EIO; |
977 | } |
978 | if (formatsp) |
979 | *formatsp = formats; |
980 | if (subformatsp) |
981 | *subformatsp = subformats; |
982 | if (bpsp) |
983 | *bpsp = bps; |
984 | } |
985 | |
986 | return 0; |
987 | } |
988 | EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm); |
989 | |
990 | /** |
991 | * snd_hdac_is_supported_format - Check the validity of the format |
992 | * @codec: the codec object |
993 | * @nid: NID to check |
994 | * @format: the HD-audio format value to check |
995 | * |
996 | * Check whether the given node supports the format value. |
997 | * |
998 | * Returns true if supported, false if not. |
999 | */ |
1000 | bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid, |
1001 | unsigned int format) |
1002 | { |
1003 | int i; |
1004 | unsigned int val = 0, rate, stream; |
1005 | |
1006 | val = query_pcm_param(codec, nid); |
1007 | if (!val) |
1008 | return false; |
1009 | |
1010 | rate = format & 0xff00; |
1011 | for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) |
1012 | if (rate_bits[i].hda_fmt == rate) { |
1013 | if (val & (1 << i)) |
1014 | break; |
1015 | return false; |
1016 | } |
1017 | if (i >= AC_PAR_PCM_RATE_BITS) |
1018 | return false; |
1019 | |
1020 | stream = query_stream_param(codec, nid); |
1021 | if (!stream) |
1022 | return false; |
1023 | |
1024 | if (stream & AC_SUPFMT_PCM) { |
1025 | switch (format & 0xf0) { |
1026 | case 0x00: |
1027 | if (!(val & AC_SUPPCM_BITS_8)) |
1028 | return false; |
1029 | break; |
1030 | case 0x10: |
1031 | if (!(val & AC_SUPPCM_BITS_16)) |
1032 | return false; |
1033 | break; |
1034 | case 0x20: |
1035 | if (!(val & AC_SUPPCM_BITS_20)) |
1036 | return false; |
1037 | break; |
1038 | case 0x30: |
1039 | if (!(val & AC_SUPPCM_BITS_24)) |
1040 | return false; |
1041 | break; |
1042 | case 0x40: |
1043 | if (!(val & AC_SUPPCM_BITS_32)) |
1044 | return false; |
1045 | break; |
1046 | default: |
1047 | return false; |
1048 | } |
1049 | } else { |
1050 | /* FIXME: check for float32 and AC3? */ |
1051 | } |
1052 | |
1053 | return true; |
1054 | } |
1055 | EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format); |
1056 | |
1057 | static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid, |
1058 | int flags, unsigned int verb, unsigned int parm) |
1059 | { |
1060 | unsigned int cmd = snd_hdac_make_cmd(codec: hdac, nid, verb, parm); |
1061 | unsigned int res; |
1062 | |
1063 | if (snd_hdac_exec_verb(codec: hdac, cmd, flags, res: &res)) |
1064 | return -1; |
1065 | |
1066 | return res; |
1067 | } |
1068 | |
1069 | static int codec_write(struct hdac_device *hdac, hda_nid_t nid, |
1070 | int flags, unsigned int verb, unsigned int parm) |
1071 | { |
1072 | unsigned int cmd = snd_hdac_make_cmd(codec: hdac, nid, verb, parm); |
1073 | |
1074 | return snd_hdac_exec_verb(codec: hdac, cmd, flags, NULL); |
1075 | } |
1076 | |
1077 | /** |
1078 | * snd_hdac_codec_read - send a command and get the response |
1079 | * @hdac: the HDAC device |
1080 | * @nid: NID to send the command |
1081 | * @flags: optional bit flags |
1082 | * @verb: the verb to send |
1083 | * @parm: the parameter for the verb |
1084 | * |
1085 | * Send a single command and read the corresponding response. |
1086 | * |
1087 | * Returns the obtained response value, or -1 for an error. |
1088 | */ |
1089 | int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid, |
1090 | int flags, unsigned int verb, unsigned int parm) |
1091 | { |
1092 | return codec_read(hdac, nid, flags, verb, parm); |
1093 | } |
1094 | EXPORT_SYMBOL_GPL(snd_hdac_codec_read); |
1095 | |
1096 | /** |
1097 | * snd_hdac_codec_write - send a single command without waiting for response |
1098 | * @hdac: the HDAC device |
1099 | * @nid: NID to send the command |
1100 | * @flags: optional bit flags |
1101 | * @verb: the verb to send |
1102 | * @parm: the parameter for the verb |
1103 | * |
1104 | * Send a single command without waiting for response. |
1105 | * |
1106 | * Returns 0 if successful, or a negative error code. |
1107 | */ |
1108 | int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid, |
1109 | int flags, unsigned int verb, unsigned int parm) |
1110 | { |
1111 | return codec_write(hdac, nid, flags, verb, parm); |
1112 | } |
1113 | EXPORT_SYMBOL_GPL(snd_hdac_codec_write); |
1114 | |
1115 | /** |
1116 | * snd_hdac_check_power_state - check whether the actual power state matches |
1117 | * with the target state |
1118 | * |
1119 | * @hdac: the HDAC device |
1120 | * @nid: NID to send the command |
1121 | * @target_state: target state to check for |
1122 | * |
1123 | * Return true if state matches, false if not |
1124 | */ |
1125 | bool snd_hdac_check_power_state(struct hdac_device *hdac, |
1126 | hda_nid_t nid, unsigned int target_state) |
1127 | { |
1128 | unsigned int state = codec_read(hdac, nid, flags: 0, |
1129 | AC_VERB_GET_POWER_STATE, parm: 0); |
1130 | |
1131 | if (state & AC_PWRST_ERROR) |
1132 | return true; |
1133 | state = (state >> 4) & 0x0f; |
1134 | return (state == target_state); |
1135 | } |
1136 | EXPORT_SYMBOL_GPL(snd_hdac_check_power_state); |
1137 | /** |
1138 | * snd_hdac_sync_power_state - wait until actual power state matches |
1139 | * with the target state |
1140 | * |
1141 | * @codec: the HDAC device |
1142 | * @nid: NID to send the command |
1143 | * @power_state: target power state to wait for |
1144 | * |
1145 | * Return power state or PS_ERROR if codec rejects GET verb. |
1146 | */ |
1147 | unsigned int snd_hdac_sync_power_state(struct hdac_device *codec, |
1148 | hda_nid_t nid, unsigned int power_state) |
1149 | { |
1150 | unsigned long end_time = jiffies + msecs_to_jiffies(m: 500); |
1151 | unsigned int state, actual_state, count; |
1152 | |
1153 | for (count = 0; count < 500; count++) { |
1154 | state = snd_hdac_codec_read(codec, nid, 0, |
1155 | AC_VERB_GET_POWER_STATE, 0); |
1156 | if (state & AC_PWRST_ERROR) { |
1157 | msleep(msecs: 20); |
1158 | break; |
1159 | } |
1160 | actual_state = (state >> 4) & 0x0f; |
1161 | if (actual_state == power_state) |
1162 | break; |
1163 | if (time_after_eq(jiffies, end_time)) |
1164 | break; |
1165 | /* wait until the codec reachs to the target state */ |
1166 | msleep(msecs: 1); |
1167 | } |
1168 | return state; |
1169 | } |
1170 | EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state); |
1171 | |