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Linux/sound/hda/hdac_device.c

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  1 /*
  2  * HD-audio codec core device
  3  */
  4 
  5 #include <linux/init.h>
  6 #include <linux/delay.h>
  7 #include <linux/device.h>
  8 #include <linux/slab.h>
  9 #include <linux/module.h>
 10 #include <linux/export.h>
 11 #include <linux/pm_runtime.h>
 12 #include <sound/hdaudio.h>
 13 #include <sound/hda_regmap.h>
 14 #include <sound/pcm.h>
 15 #include "local.h"
 16 
 17 static void setup_fg_nodes(struct hdac_device *codec);
 18 static int get_codec_vendor_name(struct hdac_device *codec);
 19 
 20 static void default_release(struct device *dev)
 21 {
 22         snd_hdac_device_exit(container_of(dev, struct hdac_device, dev));
 23 }
 24 
 25 /**
 26  * snd_hdac_device_init - initialize the HD-audio codec base device
 27  * @codec: device to initialize
 28  * @bus: but to attach
 29  * @name: device name string
 30  * @addr: codec address
 31  *
 32  * Returns zero for success or a negative error code.
 33  *
 34  * This function increments the runtime PM counter and marks it active.
 35  * The caller needs to turn it off appropriately later.
 36  *
 37  * The caller needs to set the device's release op properly by itself.
 38  */
 39 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
 40                          const char *name, unsigned int addr)
 41 {
 42         struct device *dev;
 43         hda_nid_t fg;
 44         int err;
 45 
 46         dev = &codec->dev;
 47         device_initialize(dev);
 48         dev->parent = bus->dev;
 49         dev->bus = &snd_hda_bus_type;
 50         dev->release = default_release;
 51         dev->groups = hdac_dev_attr_groups;
 52         dev_set_name(dev, "%s", name);
 53         device_enable_async_suspend(dev);
 54 
 55         codec->bus = bus;
 56         codec->addr = addr;
 57         codec->type = HDA_DEV_CORE;
 58         pm_runtime_set_active(&codec->dev);
 59         pm_runtime_get_noresume(&codec->dev);
 60         atomic_set(&codec->in_pm, 0);
 61 
 62         err = snd_hdac_bus_add_device(bus, codec);
 63         if (err < 0)
 64                 goto error;
 65 
 66         /* fill parameters */
 67         codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
 68                                               AC_PAR_VENDOR_ID);
 69         if (codec->vendor_id == -1) {
 70                 /* read again, hopefully the access method was corrected
 71                  * in the last read...
 72                  */
 73                 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
 74                                                       AC_PAR_VENDOR_ID);
 75         }
 76 
 77         codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
 78                                                  AC_PAR_SUBSYSTEM_ID);
 79         codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
 80                                                 AC_PAR_REV_ID);
 81 
 82         setup_fg_nodes(codec);
 83         if (!codec->afg && !codec->mfg) {
 84                 dev_err(dev, "no AFG or MFG node found\n");
 85                 err = -ENODEV;
 86                 goto error;
 87         }
 88 
 89         fg = codec->afg ? codec->afg : codec->mfg;
 90 
 91         err = snd_hdac_refresh_widgets(codec, false);
 92         if (err < 0)
 93                 goto error;
 94 
 95         codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
 96         /* reread ssid if not set by parameter */
 97         if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
 98                 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
 99                               &codec->subsystem_id);
100 
101         err = get_codec_vendor_name(codec);
102         if (err < 0)
103                 goto error;
104 
105         codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
106                                      codec->vendor_id & 0xffff);
107         if (!codec->chip_name) {
108                 err = -ENOMEM;
109                 goto error;
110         }
111 
112         return 0;
113 
114  error:
115         put_device(&codec->dev);
116         return err;
117 }
118 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
119 
120 /**
121  * snd_hdac_device_exit - clean up the HD-audio codec base device
122  * @codec: device to clean up
123  */
124 void snd_hdac_device_exit(struct hdac_device *codec)
125 {
126         pm_runtime_put_noidle(&codec->dev);
127         snd_hdac_bus_remove_device(codec->bus, codec);
128         kfree(codec->vendor_name);
129         kfree(codec->chip_name);
130 }
131 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
132 
133 /**
134  * snd_hdac_device_register - register the hd-audio codec base device
135  * codec: the device to register
136  */
137 int snd_hdac_device_register(struct hdac_device *codec)
138 {
139         int err;
140 
141         err = device_add(&codec->dev);
142         if (err < 0)
143                 return err;
144         err = hda_widget_sysfs_init(codec);
145         if (err < 0) {
146                 device_del(&codec->dev);
147                 return err;
148         }
149 
150         return 0;
151 }
152 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
153 
154 /**
155  * snd_hdac_device_unregister - unregister the hd-audio codec base device
156  * codec: the device to unregister
157  */
158 void snd_hdac_device_unregister(struct hdac_device *codec)
159 {
160         if (device_is_registered(&codec->dev)) {
161                 hda_widget_sysfs_exit(codec);
162                 device_del(&codec->dev);
163                 snd_hdac_bus_remove_device(codec->bus, codec);
164         }
165 }
166 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
167 
168 /**
169  * snd_hdac_device_set_chip_name - set/update the codec name
170  * @codec: the HDAC device
171  * @name: name string to set
172  *
173  * Returns 0 if the name is set or updated, or a negative error code.
174  */
175 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
176 {
177         char *newname;
178 
179         if (!name)
180                 return 0;
181         newname = kstrdup(name, GFP_KERNEL);
182         if (!newname)
183                 return -ENOMEM;
184         kfree(codec->chip_name);
185         codec->chip_name = newname;
186         return 0;
187 }
188 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
189 
190 /**
191  * snd_hdac_codec_modalias - give the module alias name
192  * @codec: HDAC device
193  * @buf: string buffer to store
194  * @size: string buffer size
195  *
196  * Returns the size of string, like snprintf(), or a negative error code.
197  */
198 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
199 {
200         return snprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
201                         codec->vendor_id, codec->revision_id, codec->type);
202 }
203 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
204 
205 /**
206  * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
207  *      HD-audio controller
208  * @codec: the codec object
209  * @nid: NID to encode
210  * @verb: verb to encode
211  * @parm: parameter to encode
212  *
213  * Return an encoded command verb or -1 for error.
214  */
215 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
216                                unsigned int verb, unsigned int parm)
217 {
218         u32 val, addr;
219 
220         addr = codec->addr;
221         if ((addr & ~0xf) || (nid & ~0x7f) ||
222             (verb & ~0xfff) || (parm & ~0xffff)) {
223                 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
224                         addr, nid, verb, parm);
225                 return -1;
226         }
227 
228         val = addr << 28;
229         val |= (u32)nid << 20;
230         val |= verb << 8;
231         val |= parm;
232         return val;
233 }
234 EXPORT_SYMBOL_GPL(snd_hdac_make_cmd);
235 
236 /**
237  * snd_hdac_exec_verb - execute an encoded verb
238  * @codec: the codec object
239  * @cmd: encoded verb to execute
240  * @flags: optional flags, pass zero for default
241  * @res: the pointer to store the result, NULL if running async
242  *
243  * Returns zero if successful, or a negative error code.
244  *
245  * This calls the exec_verb op when set in hdac_codec.  If not,
246  * call the default snd_hdac_bus_exec_verb().
247  */
248 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
249                        unsigned int flags, unsigned int *res)
250 {
251         if (codec->exec_verb)
252                 return codec->exec_verb(codec, cmd, flags, res);
253         return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
254 }
255 EXPORT_SYMBOL_GPL(snd_hdac_exec_verb);
256 
257 
258 /**
259  * snd_hdac_read - execute a verb
260  * @codec: the codec object
261  * @nid: NID to execute a verb
262  * @verb: verb to execute
263  * @parm: parameter for a verb
264  * @res: the pointer to store the result, NULL if running async
265  *
266  * Returns zero if successful, or a negative error code.
267  */
268 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
269                   unsigned int verb, unsigned int parm, unsigned int *res)
270 {
271         unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
272 
273         return snd_hdac_exec_verb(codec, cmd, 0, res);
274 }
275 EXPORT_SYMBOL_GPL(snd_hdac_read);
276 
277 /**
278  * _snd_hdac_read_parm - read a parmeter
279  *
280  * This function returns zero or an error unlike snd_hdac_read_parm().
281  */
282 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
283                         unsigned int *res)
284 {
285         unsigned int cmd;
286 
287         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
288         return snd_hdac_regmap_read_raw(codec, cmd, res);
289 }
290 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
291 
292 /**
293  * snd_hdac_read_parm_uncached - read a codec parameter without caching
294  * @codec: the codec object
295  * @nid: NID to read a parameter
296  * @parm: parameter to read
297  *
298  * Returns -1 for error.  If you need to distinguish the error more
299  * strictly, use snd_hdac_read() directly.
300  */
301 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
302                                 int parm)
303 {
304         unsigned int cmd, val;
305 
306         cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
307         if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
308                 return -1;
309         return val;
310 }
311 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
312 
313 /**
314  * snd_hdac_override_parm - override read-only parameters
315  * @codec: the codec object
316  * @nid: NID for the parameter
317  * @parm: the parameter to change
318  * @val: the parameter value to overwrite
319  */
320 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
321                            unsigned int parm, unsigned int val)
322 {
323         unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
324         int err;
325 
326         if (!codec->regmap)
327                 return -EINVAL;
328 
329         codec->caps_overwriting = true;
330         err = snd_hdac_regmap_write_raw(codec, verb, val);
331         codec->caps_overwriting = false;
332         return err;
333 }
334 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
335 
336 /**
337  * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
338  * @codec: the codec object
339  * @nid: NID to inspect
340  * @start_id: the pointer to store the starting NID
341  *
342  * Returns the number of subtree nodes or zero if not found.
343  * This function reads parameters always without caching.
344  */
345 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
346                            hda_nid_t *start_id)
347 {
348         unsigned int parm;
349 
350         parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
351         if (parm == -1) {
352                 *start_id = 0;
353                 return 0;
354         }
355         *start_id = (parm >> 16) & 0x7fff;
356         return (int)(parm & 0x7fff);
357 }
358 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
359 
360 /*
361  * look for an AFG and MFG nodes
362  */
363 static void setup_fg_nodes(struct hdac_device *codec)
364 {
365         int i, total_nodes, function_id;
366         hda_nid_t nid;
367 
368         total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
369         for (i = 0; i < total_nodes; i++, nid++) {
370                 function_id = snd_hdac_read_parm(codec, nid,
371                                                  AC_PAR_FUNCTION_TYPE);
372                 switch (function_id & 0xff) {
373                 case AC_GRP_AUDIO_FUNCTION:
374                         codec->afg = nid;
375                         codec->afg_function_id = function_id & 0xff;
376                         codec->afg_unsol = (function_id >> 8) & 1;
377                         break;
378                 case AC_GRP_MODEM_FUNCTION:
379                         codec->mfg = nid;
380                         codec->mfg_function_id = function_id & 0xff;
381                         codec->mfg_unsol = (function_id >> 8) & 1;
382                         break;
383                 default:
384                         break;
385                 }
386         }
387 }
388 
389 /**
390  * snd_hdac_refresh_widgets - Reset the widget start/end nodes
391  * @codec: the codec object
392  * @sysfs: re-initialize sysfs tree, too
393  */
394 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs)
395 {
396         hda_nid_t start_nid;
397         int nums, err;
398 
399         nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
400         if (!start_nid || nums <= 0 || nums >= 0xff) {
401                 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
402                         codec->afg);
403                 return -EINVAL;
404         }
405 
406         if (sysfs) {
407                 err = hda_widget_sysfs_reinit(codec, start_nid, nums);
408                 if (err < 0)
409                         return err;
410         }
411 
412         codec->num_nodes = nums;
413         codec->start_nid = start_nid;
414         codec->end_nid = start_nid + nums;
415         return 0;
416 }
417 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
418 
419 /* return CONNLIST_LEN parameter of the given widget */
420 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
421 {
422         unsigned int wcaps = get_wcaps(codec, nid);
423         unsigned int parm;
424 
425         if (!(wcaps & AC_WCAP_CONN_LIST) &&
426             get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
427                 return 0;
428 
429         parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
430         if (parm == -1)
431                 parm = 0;
432         return parm;
433 }
434 
435 /**
436  * snd_hdac_get_connections - get a widget connection list
437  * @codec: the codec object
438  * @nid: NID
439  * @conn_list: the array to store the results, can be NULL
440  * @max_conns: the max size of the given array
441  *
442  * Returns the number of connected widgets, zero for no connection, or a
443  * negative error code.  When the number of elements don't fit with the
444  * given array size, it returns -ENOSPC.
445  *
446  * When @conn_list is NULL, it just checks the number of connections.
447  */
448 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
449                              hda_nid_t *conn_list, int max_conns)
450 {
451         unsigned int parm;
452         int i, conn_len, conns, err;
453         unsigned int shift, num_elems, mask;
454         hda_nid_t prev_nid;
455         int null_count = 0;
456 
457         parm = get_num_conns(codec, nid);
458         if (!parm)
459                 return 0;
460 
461         if (parm & AC_CLIST_LONG) {
462                 /* long form */
463                 shift = 16;
464                 num_elems = 2;
465         } else {
466                 /* short form */
467                 shift = 8;
468                 num_elems = 4;
469         }
470         conn_len = parm & AC_CLIST_LENGTH;
471         mask = (1 << (shift-1)) - 1;
472 
473         if (!conn_len)
474                 return 0; /* no connection */
475 
476         if (conn_len == 1) {
477                 /* single connection */
478                 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
479                                     &parm);
480                 if (err < 0)
481                         return err;
482                 if (conn_list)
483                         conn_list[0] = parm & mask;
484                 return 1;
485         }
486 
487         /* multi connection */
488         conns = 0;
489         prev_nid = 0;
490         for (i = 0; i < conn_len; i++) {
491                 int range_val;
492                 hda_nid_t val, n;
493 
494                 if (i % num_elems == 0) {
495                         err = snd_hdac_read(codec, nid,
496                                             AC_VERB_GET_CONNECT_LIST, i,
497                                             &parm);
498                         if (err < 0)
499                                 return -EIO;
500                 }
501                 range_val = !!(parm & (1 << (shift-1))); /* ranges */
502                 val = parm & mask;
503                 if (val == 0 && null_count++) {  /* no second chance */
504                         dev_dbg(&codec->dev,
505                                 "invalid CONNECT_LIST verb %x[%i]:%x\n",
506                                 nid, i, parm);
507                         return 0;
508                 }
509                 parm >>= shift;
510                 if (range_val) {
511                         /* ranges between the previous and this one */
512                         if (!prev_nid || prev_nid >= val) {
513                                 dev_warn(&codec->dev,
514                                          "invalid dep_range_val %x:%x\n",
515                                          prev_nid, val);
516                                 continue;
517                         }
518                         for (n = prev_nid + 1; n <= val; n++) {
519                                 if (conn_list) {
520                                         if (conns >= max_conns)
521                                                 return -ENOSPC;
522                                         conn_list[conns] = n;
523                                 }
524                                 conns++;
525                         }
526                 } else {
527                         if (conn_list) {
528                                 if (conns >= max_conns)
529                                         return -ENOSPC;
530                                 conn_list[conns] = val;
531                         }
532                         conns++;
533                 }
534                 prev_nid = val;
535         }
536         return conns;
537 }
538 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
539 
540 #ifdef CONFIG_PM
541 /**
542  * snd_hdac_power_up - power up the codec
543  * @codec: the codec object
544  *
545  * This function calls the runtime PM helper to power up the given codec.
546  * Unlike snd_hdac_power_up_pm(), you should call this only for the code
547  * path that isn't included in PM path.  Otherwise it gets stuck.
548  *
549  * Returns zero if successful, or a negative error code.
550  */
551 int snd_hdac_power_up(struct hdac_device *codec)
552 {
553         return pm_runtime_get_sync(&codec->dev);
554 }
555 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
556 
557 /**
558  * snd_hdac_power_down - power down the codec
559  * @codec: the codec object
560  *
561  * Returns zero if successful, or a negative error code.
562  */
563 int snd_hdac_power_down(struct hdac_device *codec)
564 {
565         struct device *dev = &codec->dev;
566 
567         pm_runtime_mark_last_busy(dev);
568         return pm_runtime_put_autosuspend(dev);
569 }
570 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
571 
572 /**
573  * snd_hdac_power_up_pm - power up the codec
574  * @codec: the codec object
575  *
576  * This function can be called in a recursive code path like init code
577  * which may be called by PM suspend/resume again.  OTOH, if a power-up
578  * call must wake up the sleeper (e.g. in a kctl callback), use
579  * snd_hdac_power_up() instead.
580  *
581  * Returns zero if successful, or a negative error code.
582  */
583 int snd_hdac_power_up_pm(struct hdac_device *codec)
584 {
585         if (!atomic_inc_not_zero(&codec->in_pm))
586                 return snd_hdac_power_up(codec);
587         return 0;
588 }
589 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
590 
591 /* like snd_hdac_power_up_pm(), but only increment the pm count when
592  * already powered up.  Returns -1 if not powered up, 1 if incremented
593  * or 0 if unchanged.  Only used in hdac_regmap.c
594  */
595 int snd_hdac_keep_power_up(struct hdac_device *codec)
596 {
597         if (!atomic_inc_not_zero(&codec->in_pm)) {
598                 int ret = pm_runtime_get_if_in_use(&codec->dev);
599                 if (!ret)
600                         return -1;
601                 if (ret < 0)
602                         return 0;
603         }
604         return 1;
605 }
606 
607 /**
608  * snd_hdac_power_down_pm - power down the codec
609  * @codec: the codec object
610  *
611  * Like snd_hdac_power_up_pm(), this function is used in a recursive
612  * code path like init code which may be called by PM suspend/resume again.
613  *
614  * Returns zero if successful, or a negative error code.
615  */
616 int snd_hdac_power_down_pm(struct hdac_device *codec)
617 {
618         if (atomic_dec_if_positive(&codec->in_pm) < 0)
619                 return snd_hdac_power_down(codec);
620         return 0;
621 }
622 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
623 #endif
624 
625 /**
626  * snd_hdac_link_power - Enable/disable the link power for a codec
627  * @codec: the codec object
628  * @bool: enable or disable the link power
629  */
630 int snd_hdac_link_power(struct hdac_device *codec, bool enable)
631 {
632         if  (!codec->link_power_control)
633                 return 0;
634 
635         if  (codec->bus->ops->link_power)
636                 return codec->bus->ops->link_power(codec->bus, enable);
637         else
638                 return -EINVAL;
639 }
640 EXPORT_SYMBOL_GPL(snd_hdac_link_power);
641 
642 /* codec vendor labels */
643 struct hda_vendor_id {
644         unsigned int id;
645         const char *name;
646 };
647 
648 static struct hda_vendor_id hda_vendor_ids[] = {
649         { 0x1002, "ATI" },
650         { 0x1013, "Cirrus Logic" },
651         { 0x1057, "Motorola" },
652         { 0x1095, "Silicon Image" },
653         { 0x10de, "Nvidia" },
654         { 0x10ec, "Realtek" },
655         { 0x1102, "Creative" },
656         { 0x1106, "VIA" },
657         { 0x111d, "IDT" },
658         { 0x11c1, "LSI" },
659         { 0x11d4, "Analog Devices" },
660         { 0x13f6, "C-Media" },
661         { 0x14f1, "Conexant" },
662         { 0x17e8, "Chrontel" },
663         { 0x1854, "LG" },
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 */
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 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  */
739 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
740                                          unsigned int channels,
741                                          unsigned int 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 
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 
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  */
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  */
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 
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 
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  */
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  */
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  */
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  * @hdac: the HDAC device
1073  * @nid: NID to send the command
1074  * @target_state: target state to check for
1075  *
1076  * Return power state or PS_ERROR if codec rejects GET verb.
1077  */
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 

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