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TOMOYO Linux Cross Reference
Linux/sound/hda/hdac_device.c

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

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