1 // SPDX-License-Identifier: GPL-2.0-only
3 * HD-audio codec core device
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>
18 static void setup_fg_nodes(struct hdac_device *codec);
19 static int get_codec_vendor_name(struct hdac_device *codec);
21 static void default_release(struct device *dev)
23 snd_hdac_device_exit(dev_to_hdac_dev(dev));
27 * snd_hdac_device_init - initialize the HD-audio codec base device
28 * @codec: device to initialize
30 * @name: device name string
31 * @addr: codec address
33 * Returns zero for success or a negative error code.
35 * This function increments the runtime PM counter and marks it active.
36 * The caller needs to turn it off appropriately later.
38 * The caller needs to set the device's release op properly by itself.
40 int snd_hdac_device_init(struct hdac_device *codec, struct hdac_bus *bus,
41 const char *name, unsigned int addr)
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);
58 codec->type = HDA_DEV_CORE;
59 mutex_init(&codec->widget_lock);
60 mutex_init(&codec->regmap_lock);
61 pm_runtime_set_active(&codec->dev);
62 pm_runtime_get_noresume(&codec->dev);
63 atomic_set(&codec->in_pm, 0);
65 err = snd_hdac_bus_add_device(bus, codec);
70 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
72 if (codec->vendor_id == -1) {
73 /* read again, hopefully the access method was corrected
76 codec->vendor_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
80 codec->subsystem_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
82 codec->revision_id = snd_hdac_read_parm(codec, AC_NODE_ROOT,
85 setup_fg_nodes(codec);
86 if (!codec->afg && !codec->mfg) {
87 dev_err(dev, "no AFG or MFG node found\n");
92 fg = codec->afg ? codec->afg : codec->mfg;
94 err = snd_hdac_refresh_widgets(codec);
98 codec->power_caps = snd_hdac_read_parm(codec, fg, AC_PAR_POWER_STATE);
99 /* reread ssid if not set by parameter */
100 if (codec->subsystem_id == -1 || codec->subsystem_id == 0)
101 snd_hdac_read(codec, fg, AC_VERB_GET_SUBSYSTEM_ID, 0,
102 &codec->subsystem_id);
104 err = get_codec_vendor_name(codec);
108 codec->chip_name = kasprintf(GFP_KERNEL, "ID %x",
109 codec->vendor_id & 0xffff);
110 if (!codec->chip_name) {
118 put_device(&codec->dev);
121 EXPORT_SYMBOL_GPL(snd_hdac_device_init);
124 * snd_hdac_device_exit - clean up the HD-audio codec base device
125 * @codec: device to clean up
127 void snd_hdac_device_exit(struct hdac_device *codec)
129 pm_runtime_put_noidle(&codec->dev);
130 /* keep balance of runtime PM child_count in parent device */
131 pm_runtime_set_suspended(&codec->dev);
132 snd_hdac_bus_remove_device(codec->bus, codec);
133 kfree(codec->vendor_name);
134 kfree(codec->chip_name);
136 EXPORT_SYMBOL_GPL(snd_hdac_device_exit);
139 * snd_hdac_device_register - register the hd-audio codec base device
140 * @codec: the device to register
142 int snd_hdac_device_register(struct hdac_device *codec)
146 err = device_add(&codec->dev);
149 mutex_lock(&codec->widget_lock);
150 err = hda_widget_sysfs_init(codec);
151 mutex_unlock(&codec->widget_lock);
153 device_del(&codec->dev);
159 EXPORT_SYMBOL_GPL(snd_hdac_device_register);
162 * snd_hdac_device_unregister - unregister the hd-audio codec base device
163 * @codec: the device to unregister
165 void snd_hdac_device_unregister(struct hdac_device *codec)
167 if (device_is_registered(&codec->dev)) {
168 mutex_lock(&codec->widget_lock);
169 hda_widget_sysfs_exit(codec);
170 mutex_unlock(&codec->widget_lock);
171 device_del(&codec->dev);
172 snd_hdac_bus_remove_device(codec->bus, codec);
175 EXPORT_SYMBOL_GPL(snd_hdac_device_unregister);
178 * snd_hdac_device_set_chip_name - set/update the codec name
179 * @codec: the HDAC device
180 * @name: name string to set
182 * Returns 0 if the name is set or updated, or a negative error code.
184 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name)
190 newname = kstrdup(name, GFP_KERNEL);
193 kfree(codec->chip_name);
194 codec->chip_name = newname;
197 EXPORT_SYMBOL_GPL(snd_hdac_device_set_chip_name);
200 * snd_hdac_codec_modalias - give the module alias name
201 * @codec: HDAC device
202 * @buf: string buffer to store
203 * @size: string buffer size
205 * Returns the size of string, like snprintf(), or a negative error code.
207 int snd_hdac_codec_modalias(struct hdac_device *codec, char *buf, size_t size)
209 return scnprintf(buf, size, "hdaudio:v%08Xr%08Xa%02X\n",
210 codec->vendor_id, codec->revision_id, codec->type);
212 EXPORT_SYMBOL_GPL(snd_hdac_codec_modalias);
215 * snd_hdac_make_cmd - compose a 32bit command word to be sent to the
216 * HD-audio controller
217 * @codec: the codec object
218 * @nid: NID to encode
219 * @verb: verb to encode
220 * @parm: parameter to encode
222 * Return an encoded command verb or -1 for error.
224 static unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
225 unsigned int verb, unsigned int parm)
230 if ((addr & ~0xf) || (nid & ~0x7f) ||
231 (verb & ~0xfff) || (parm & ~0xffff)) {
232 dev_err(&codec->dev, "out of range cmd %x:%x:%x:%x\n",
233 addr, nid, verb, parm);
238 val |= (u32)nid << 20;
245 * snd_hdac_exec_verb - execute an encoded verb
246 * @codec: the codec object
247 * @cmd: encoded verb to execute
248 * @flags: optional flags, pass zero for default
249 * @res: the pointer to store the result, NULL if running async
251 * Returns zero if successful, or a negative error code.
253 * This calls the exec_verb op when set in hdac_codec. If not,
254 * call the default snd_hdac_bus_exec_verb().
256 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
257 unsigned int flags, unsigned int *res)
259 if (codec->exec_verb)
260 return codec->exec_verb(codec, cmd, flags, res);
261 return snd_hdac_bus_exec_verb(codec->bus, codec->addr, cmd, res);
266 * snd_hdac_read - execute a verb
267 * @codec: the codec object
268 * @nid: NID to execute a verb
269 * @verb: verb to execute
270 * @parm: parameter for a verb
271 * @res: the pointer to store the result, NULL if running async
273 * Returns zero if successful, or a negative error code.
275 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
276 unsigned int verb, unsigned int parm, unsigned int *res)
278 unsigned int cmd = snd_hdac_make_cmd(codec, nid, verb, parm);
280 return snd_hdac_exec_verb(codec, cmd, 0, res);
282 EXPORT_SYMBOL_GPL(snd_hdac_read);
285 * _snd_hdac_read_parm - read a parmeter
286 * @codec: the codec object
287 * @nid: NID to read a parameter
288 * @parm: parameter to read
289 * @res: pointer to store the read value
291 * This function returns zero or an error unlike snd_hdac_read_parm().
293 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
298 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
299 return snd_hdac_regmap_read_raw(codec, cmd, res);
301 EXPORT_SYMBOL_GPL(_snd_hdac_read_parm);
304 * snd_hdac_read_parm_uncached - read a codec parameter without caching
305 * @codec: the codec object
306 * @nid: NID to read a parameter
307 * @parm: parameter to read
309 * Returns -1 for error. If you need to distinguish the error more
310 * strictly, use snd_hdac_read() directly.
312 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
315 unsigned int cmd, val;
317 cmd = snd_hdac_regmap_encode_verb(nid, AC_VERB_PARAMETERS) | parm;
318 if (snd_hdac_regmap_read_raw_uncached(codec, cmd, &val) < 0)
322 EXPORT_SYMBOL_GPL(snd_hdac_read_parm_uncached);
325 * snd_hdac_override_parm - override read-only parameters
326 * @codec: the codec object
327 * @nid: NID for the parameter
328 * @parm: the parameter to change
329 * @val: the parameter value to overwrite
331 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
332 unsigned int parm, unsigned int val)
334 unsigned int verb = (AC_VERB_PARAMETERS << 8) | (nid << 20) | parm;
340 codec->caps_overwriting = true;
341 err = snd_hdac_regmap_write_raw(codec, verb, val);
342 codec->caps_overwriting = false;
345 EXPORT_SYMBOL_GPL(snd_hdac_override_parm);
348 * snd_hdac_get_sub_nodes - get start NID and number of subtree nodes
349 * @codec: the codec object
350 * @nid: NID to inspect
351 * @start_id: the pointer to store the starting NID
353 * Returns the number of subtree nodes or zero if not found.
354 * This function reads parameters always without caching.
356 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
361 parm = snd_hdac_read_parm_uncached(codec, nid, AC_PAR_NODE_COUNT);
366 *start_id = (parm >> 16) & 0x7fff;
367 return (int)(parm & 0x7fff);
369 EXPORT_SYMBOL_GPL(snd_hdac_get_sub_nodes);
372 * look for an AFG and MFG nodes
374 static void setup_fg_nodes(struct hdac_device *codec)
376 int i, total_nodes, function_id;
379 total_nodes = snd_hdac_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
380 for (i = 0; i < total_nodes; i++, nid++) {
381 function_id = snd_hdac_read_parm(codec, nid,
382 AC_PAR_FUNCTION_TYPE);
383 switch (function_id & 0xff) {
384 case AC_GRP_AUDIO_FUNCTION:
386 codec->afg_function_id = function_id & 0xff;
387 codec->afg_unsol = (function_id >> 8) & 1;
389 case AC_GRP_MODEM_FUNCTION:
391 codec->mfg_function_id = function_id & 0xff;
392 codec->mfg_unsol = (function_id >> 8) & 1;
401 * snd_hdac_refresh_widgets - Reset the widget start/end nodes
402 * @codec: the codec object
404 int snd_hdac_refresh_widgets(struct hdac_device *codec)
410 * Serialize against multiple threads trying to update the sysfs
413 mutex_lock(&codec->widget_lock);
414 nums = snd_hdac_get_sub_nodes(codec, codec->afg, &start_nid);
415 if (!start_nid || nums <= 0 || nums >= 0xff) {
416 dev_err(&codec->dev, "cannot read sub nodes for FG 0x%02x\n",
422 err = hda_widget_sysfs_reinit(codec, start_nid, nums);
426 codec->num_nodes = nums;
427 codec->start_nid = start_nid;
428 codec->end_nid = start_nid + nums;
430 mutex_unlock(&codec->widget_lock);
433 EXPORT_SYMBOL_GPL(snd_hdac_refresh_widgets);
435 /* return CONNLIST_LEN parameter of the given widget */
436 static unsigned int get_num_conns(struct hdac_device *codec, hda_nid_t nid)
438 unsigned int wcaps = get_wcaps(codec, nid);
441 if (!(wcaps & AC_WCAP_CONN_LIST) &&
442 get_wcaps_type(wcaps) != AC_WID_VOL_KNB)
445 parm = snd_hdac_read_parm(codec, nid, AC_PAR_CONNLIST_LEN);
452 * snd_hdac_get_connections - get a widget connection list
453 * @codec: the codec object
455 * @conn_list: the array to store the results, can be NULL
456 * @max_conns: the max size of the given array
458 * Returns the number of connected widgets, zero for no connection, or a
459 * negative error code. When the number of elements don't fit with the
460 * given array size, it returns -ENOSPC.
462 * When @conn_list is NULL, it just checks the number of connections.
464 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
465 hda_nid_t *conn_list, int max_conns)
468 int i, conn_len, conns, err;
469 unsigned int shift, num_elems, mask;
473 parm = get_num_conns(codec, nid);
477 if (parm & AC_CLIST_LONG) {
486 conn_len = parm & AC_CLIST_LENGTH;
487 mask = (1 << (shift-1)) - 1;
490 return 0; /* no connection */
493 /* single connection */
494 err = snd_hdac_read(codec, nid, AC_VERB_GET_CONNECT_LIST, 0,
499 conn_list[0] = parm & mask;
503 /* multi connection */
506 for (i = 0; i < conn_len; i++) {
510 if (i % num_elems == 0) {
511 err = snd_hdac_read(codec, nid,
512 AC_VERB_GET_CONNECT_LIST, i,
517 range_val = !!(parm & (1 << (shift-1))); /* ranges */
519 if (val == 0 && null_count++) { /* no second chance */
521 "invalid CONNECT_LIST verb %x[%i]:%x\n",
527 /* ranges between the previous and this one */
528 if (!prev_nid || prev_nid >= val) {
529 dev_warn(&codec->dev,
530 "invalid dep_range_val %x:%x\n",
534 for (n = prev_nid + 1; n <= val; n++) {
536 if (conns >= max_conns)
538 conn_list[conns] = n;
544 if (conns >= max_conns)
546 conn_list[conns] = val;
554 EXPORT_SYMBOL_GPL(snd_hdac_get_connections);
558 * snd_hdac_power_up - power up the codec
559 * @codec: the codec object
561 * This function calls the runtime PM helper to power up the given codec.
562 * Unlike snd_hdac_power_up_pm(), you should call this only for the code
563 * path that isn't included in PM path. Otherwise it gets stuck.
565 * Returns zero if successful, or a negative error code.
567 int snd_hdac_power_up(struct hdac_device *codec)
569 return pm_runtime_get_sync(&codec->dev);
571 EXPORT_SYMBOL_GPL(snd_hdac_power_up);
574 * snd_hdac_power_down - power down the codec
575 * @codec: the codec object
577 * Returns zero if successful, or a negative error code.
579 int snd_hdac_power_down(struct hdac_device *codec)
581 struct device *dev = &codec->dev;
583 pm_runtime_mark_last_busy(dev);
584 return pm_runtime_put_autosuspend(dev);
586 EXPORT_SYMBOL_GPL(snd_hdac_power_down);
589 * snd_hdac_power_up_pm - power up the codec
590 * @codec: the codec object
592 * This function can be called in a recursive code path like init code
593 * which may be called by PM suspend/resume again. OTOH, if a power-up
594 * call must wake up the sleeper (e.g. in a kctl callback), use
595 * snd_hdac_power_up() instead.
597 * Returns zero if successful, or a negative error code.
599 int snd_hdac_power_up_pm(struct hdac_device *codec)
601 if (!atomic_inc_not_zero(&codec->in_pm))
602 return snd_hdac_power_up(codec);
605 EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
607 /* like snd_hdac_power_up_pm(), but only increment the pm count when
608 * already powered up. Returns -1 if not powered up, 1 if incremented
609 * or 0 if unchanged. Only used in hdac_regmap.c
611 int snd_hdac_keep_power_up(struct hdac_device *codec)
613 if (!atomic_inc_not_zero(&codec->in_pm)) {
614 int ret = pm_runtime_get_if_in_use(&codec->dev);
624 * snd_hdac_power_down_pm - power down the codec
625 * @codec: the codec object
627 * Like snd_hdac_power_up_pm(), this function is used in a recursive
628 * code path like init code which may be called by PM suspend/resume again.
630 * Returns zero if successful, or a negative error code.
632 int snd_hdac_power_down_pm(struct hdac_device *codec)
634 if (atomic_dec_if_positive(&codec->in_pm) < 0)
635 return snd_hdac_power_down(codec);
638 EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
641 /* codec vendor labels */
642 struct hda_vendor_id {
647 static const struct hda_vendor_id hda_vendor_ids[] = {
649 { 0x1013, "Cirrus Logic" },
650 { 0x1057, "Motorola" },
651 { 0x1095, "Silicon Image" },
652 { 0x10de, "Nvidia" },
653 { 0x10ec, "Realtek" },
654 { 0x1102, "Creative" },
658 { 0x11d4, "Analog Devices" },
659 { 0x13f6, "C-Media" },
660 { 0x14f1, "Conexant" },
661 { 0x17e8, "Chrontel" },
663 { 0x19e5, "Huawei" },
664 { 0x1aec, "Wolfson Microelectronics" },
666 { 0x434d, "C-Media" },
668 { 0x8384, "SigmaTel" },
672 /* store the codec vendor name */
673 static int get_codec_vendor_name(struct hdac_device *codec)
675 const struct hda_vendor_id *c;
676 u16 vendor_id = codec->vendor_id >> 16;
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;
685 codec->vendor_name = kasprintf(GFP_KERNEL, "Generic %04x", vendor_id);
686 return codec->vendor_name ? 0 : -ENOMEM;
692 struct hda_rate_tbl {
694 unsigned int alsa_bits;
695 unsigned int hda_fmt;
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))
703 static const struct hda_rate_tbl rate_bits[] = {
704 /* rate in Hz, ALSA rate bitmask, HDA format value */
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 */
721 /* not autodetected value */
722 { 9600, SNDRV_PCM_RATE_KNOT, HDA_RATE(48, 1, 5) },
724 { 0 } /* terminator */
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)
735 * Calculate the format bitset from the given rate, channels and th PCM format.
737 * Return zero if invalid.
739 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
740 unsigned int channels,
741 snd_pcm_format_t format,
743 unsigned short spdif_ctls)
746 unsigned int val = 0;
748 for (i = 0; rate_bits[i].hz; i++)
749 if (rate_bits[i].hz == rate) {
750 val = rate_bits[i].hda_fmt;
753 if (!rate_bits[i].hz)
756 if (channels == 0 || channels > 8)
760 switch (snd_pcm_format_width(format)) {
762 val |= AC_FMT_BITS_8;
765 val |= AC_FMT_BITS_16;
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;
775 val |= AC_FMT_BITS_20;
781 if (spdif_ctls & AC_DIG1_NONAUDIO)
782 val |= AC_FMT_TYPE_NON_PCM;
786 EXPORT_SYMBOL_GPL(snd_hdac_calc_stream_format);
788 static unsigned int query_pcm_param(struct hdac_device *codec, hda_nid_t nid)
790 unsigned int val = 0;
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)
802 static unsigned int query_stream_param(struct hdac_device *codec, hda_nid_t nid)
804 unsigned int streams = snd_hdac_read_parm(codec, nid, AC_PAR_STREAM);
806 if (!streams || streams == -1)
807 streams = snd_hdac_read_parm(codec, codec->afg, AC_PAR_STREAM);
808 if (!streams || streams == -1)
814 * snd_hdac_query_supported_pcm - query the supported PCM rates and formats
815 * @codec: the codec object
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
821 * Queries the supported PCM rates and formats. The NULL @ratesp, @formatsp
822 * or @bsps argument is ignored.
824 * Returns 0 if successful, otherwise a negative error code.
826 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
827 u32 *ratesp, u64 *formatsp, unsigned int *bpsp)
829 unsigned int i, val, wcaps;
831 wcaps = get_wcaps(codec, nid);
832 val = query_pcm_param(codec, nid);
836 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++) {
838 rates |= rate_bits[i].alsa_bits;
842 "rates == 0 (nid=0x%x, val=0x%x, ovrd=%i)\n",
844 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0);
850 if (formatsp || bpsp) {
852 unsigned int streams, bps;
854 streams = query_stream_param(codec, nid);
859 if (streams & AC_SUPFMT_PCM) {
860 if (val & AC_SUPPCM_BITS_8) {
861 formats |= SNDRV_PCM_FMTBIT_U8;
864 if (val & AC_SUPPCM_BITS_16) {
865 formats |= SNDRV_PCM_FMTBIT_S16_LE;
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)
875 else if (val & AC_SUPPCM_BITS_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)
882 else if (val & AC_SUPPCM_BITS_24)
884 else if (val & AC_SUPPCM_BITS_20)
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;
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...
900 formats |= SNDRV_PCM_FMTBIT_U8;
905 "formats == 0 (nid=0x%x, val=0x%x, ovrd=%i, streams=0x%x)\n",
907 (wcaps & AC_WCAP_FORMAT_OVRD) ? 1 : 0,
919 EXPORT_SYMBOL_GPL(snd_hdac_query_supported_pcm);
922 * snd_hdac_is_supported_format - Check the validity of the format
923 * @codec: the codec object
925 * @format: the HD-audio format value to check
927 * Check whether the given node supports the format value.
929 * Returns true if supported, false if not.
931 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
935 unsigned int val = 0, rate, stream;
937 val = query_pcm_param(codec, nid);
941 rate = format & 0xff00;
942 for (i = 0; i < AC_PAR_PCM_RATE_BITS; i++)
943 if (rate_bits[i].hda_fmt == rate) {
948 if (i >= AC_PAR_PCM_RATE_BITS)
951 stream = query_stream_param(codec, nid);
955 if (stream & AC_SUPFMT_PCM) {
956 switch (format & 0xf0) {
958 if (!(val & AC_SUPPCM_BITS_8))
962 if (!(val & AC_SUPPCM_BITS_16))
966 if (!(val & AC_SUPPCM_BITS_20))
970 if (!(val & AC_SUPPCM_BITS_24))
974 if (!(val & AC_SUPPCM_BITS_32))
981 /* FIXME: check for float32 and AC3? */
986 EXPORT_SYMBOL_GPL(snd_hdac_is_supported_format);
988 static unsigned int codec_read(struct hdac_device *hdac, hda_nid_t nid,
989 int flags, unsigned int verb, unsigned int parm)
991 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
994 if (snd_hdac_exec_verb(hdac, cmd, flags, &res))
1000 static int codec_write(struct hdac_device *hdac, hda_nid_t nid,
1001 int flags, unsigned int verb, unsigned int parm)
1003 unsigned int cmd = snd_hdac_make_cmd(hdac, nid, verb, parm);
1005 return snd_hdac_exec_verb(hdac, cmd, flags, NULL);
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
1016 * Send a single command and read the corresponding response.
1018 * Returns the obtained response value, or -1 for an error.
1020 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
1021 int flags, unsigned int verb, unsigned int parm)
1023 return codec_read(hdac, nid, flags, verb, parm);
1025 EXPORT_SYMBOL_GPL(snd_hdac_codec_read);
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
1035 * Send a single command without waiting for response.
1037 * Returns 0 if successful, or a negative error code.
1039 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
1040 int flags, unsigned int verb, unsigned int parm)
1042 return codec_write(hdac, nid, flags, verb, parm);
1044 EXPORT_SYMBOL_GPL(snd_hdac_codec_write);
1047 * snd_hdac_check_power_state - check whether the actual power state matches
1048 * with the target state
1050 * @hdac: the HDAC device
1051 * @nid: NID to send the command
1052 * @target_state: target state to check for
1054 * Return true if state matches, false if not
1056 bool snd_hdac_check_power_state(struct hdac_device *hdac,
1057 hda_nid_t nid, unsigned int target_state)
1059 unsigned int state = codec_read(hdac, nid, 0,
1060 AC_VERB_GET_POWER_STATE, 0);
1062 if (state & AC_PWRST_ERROR)
1064 state = (state >> 4) & 0x0f;
1065 return (state == target_state);
1067 EXPORT_SYMBOL_GPL(snd_hdac_check_power_state);
1069 * snd_hdac_sync_power_state - wait until actual power state matches
1070 * with the target state
1072 * @codec: the HDAC device
1073 * @nid: NID to send the command
1074 * @power_state: target power state to wait for
1076 * Return power state or PS_ERROR if codec rejects GET verb.
1078 unsigned int snd_hdac_sync_power_state(struct hdac_device *codec,
1079 hda_nid_t nid, unsigned int power_state)
1081 unsigned long end_time = jiffies + msecs_to_jiffies(500);
1082 unsigned int state, actual_state, count;
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) {
1091 actual_state = (state >> 4) & 0x0f;
1092 if (actual_state == power_state)
1094 if (time_after_eq(jiffies, end_time))
1096 /* wait until the codec reachs to the target state */
1101 EXPORT_SYMBOL_GPL(snd_hdac_sync_power_state);