1// SPDX-License-Identifier: GPL-2.0
2//
3// Driver for the TAS5805M Audio Amplifier
4//
5// Author: Andy Liu <andy-liu@ti.com>
6// Author: Daniel Beer <daniel.beer@igorinstitute.com>
7//
8// This is based on a driver originally written by Andy Liu at TI and
9// posted here:
10//
11// https://e2e.ti.com/support/audio-group/audio/f/audio-forum/722027/linux-tas5825m-linux-drivers
12//
13// It has been simplified a little and reworked for the 5.x ALSA SoC API.
14
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/kernel.h>
18#include <linux/firmware.h>
19#include <linux/slab.h>
20#include <linux/of.h>
21#include <linux/init.h>
22#include <linux/i2c.h>
23#include <linux/regmap.h>
24#include <linux/gpio/consumer.h>
25#include <linux/regulator/consumer.h>
26#include <linux/atomic.h>
27#include <linux/workqueue.h>
28
29#include <sound/soc.h>
30#include <sound/pcm.h>
31#include <sound/initval.h>
32
33/* Datasheet-defined registers on page 0, book 0 */
34#define REG_PAGE 0x00
35#define REG_DEVICE_CTRL_1 0x02
36#define REG_DEVICE_CTRL_2 0x03
37#define REG_SIG_CH_CTRL 0x28
38#define REG_SAP_CTRL_1 0x33
39#define REG_FS_MON 0x37
40#define REG_BCK_MON 0x38
41#define REG_CLKDET_STATUS 0x39
42#define REG_VOL_CTL 0x4c
43#define REG_AGAIN 0x54
44#define REG_ADR_PIN_CTRL 0x60
45#define REG_ADR_PIN_CONFIG 0x61
46#define REG_CHAN_FAULT 0x70
47#define REG_GLOBAL_FAULT1 0x71
48#define REG_GLOBAL_FAULT2 0x72
49#define REG_FAULT 0x78
50#define REG_BOOK 0x7f
51
52/* DEVICE_CTRL_2 register values */
53#define DCTRL2_MODE_DEEP_SLEEP 0x00
54#define DCTRL2_MODE_SLEEP 0x01
55#define DCTRL2_MODE_HIZ 0x02
56#define DCTRL2_MODE_PLAY 0x03
57
58#define DCTRL2_MUTE 0x08
59#define DCTRL2_DIS_DSP 0x10
60
61/* This sequence of register writes must always be sent, prior to the
62 * 5ms delay while we wait for the DSP to boot.
63 */
64static const uint8_t dsp_cfg_preboot[] = {
65 0x00, 0x00, 0x7f, 0x00, 0x03, 0x02, 0x01, 0x11,
66 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
67 0x00, 0x00, 0x7f, 0x00, 0x03, 0x02,
68};
69
70static const uint32_t tas5805m_volume[] = {
71 0x0000001B, /* 0, -110dB */ 0x0000001E, /* 1, -109dB */
72 0x00000021, /* 2, -108dB */ 0x00000025, /* 3, -107dB */
73 0x0000002A, /* 4, -106dB */ 0x0000002F, /* 5, -105dB */
74 0x00000035, /* 6, -104dB */ 0x0000003B, /* 7, -103dB */
75 0x00000043, /* 8, -102dB */ 0x0000004B, /* 9, -101dB */
76 0x00000054, /* 10, -100dB */ 0x0000005E, /* 11, -99dB */
77 0x0000006A, /* 12, -98dB */ 0x00000076, /* 13, -97dB */
78 0x00000085, /* 14, -96dB */ 0x00000095, /* 15, -95dB */
79 0x000000A7, /* 16, -94dB */ 0x000000BC, /* 17, -93dB */
80 0x000000D3, /* 18, -92dB */ 0x000000EC, /* 19, -91dB */
81 0x00000109, /* 20, -90dB */ 0x0000012A, /* 21, -89dB */
82 0x0000014E, /* 22, -88dB */ 0x00000177, /* 23, -87dB */
83 0x000001A4, /* 24, -86dB */ 0x000001D8, /* 25, -85dB */
84 0x00000211, /* 26, -84dB */ 0x00000252, /* 27, -83dB */
85 0x0000029A, /* 28, -82dB */ 0x000002EC, /* 29, -81dB */
86 0x00000347, /* 30, -80dB */ 0x000003AD, /* 31, -79dB */
87 0x00000420, /* 32, -78dB */ 0x000004A1, /* 33, -77dB */
88 0x00000532, /* 34, -76dB */ 0x000005D4, /* 35, -75dB */
89 0x0000068A, /* 36, -74dB */ 0x00000756, /* 37, -73dB */
90 0x0000083B, /* 38, -72dB */ 0x0000093C, /* 39, -71dB */
91 0x00000A5D, /* 40, -70dB */ 0x00000BA0, /* 41, -69dB */
92 0x00000D0C, /* 42, -68dB */ 0x00000EA3, /* 43, -67dB */
93 0x0000106C, /* 44, -66dB */ 0x0000126D, /* 45, -65dB */
94 0x000014AD, /* 46, -64dB */ 0x00001733, /* 47, -63dB */
95 0x00001A07, /* 48, -62dB */ 0x00001D34, /* 49, -61dB */
96 0x000020C5, /* 50, -60dB */ 0x000024C4, /* 51, -59dB */
97 0x00002941, /* 52, -58dB */ 0x00002E49, /* 53, -57dB */
98 0x000033EF, /* 54, -56dB */ 0x00003A45, /* 55, -55dB */
99 0x00004161, /* 56, -54dB */ 0x0000495C, /* 57, -53dB */
100 0x0000524F, /* 58, -52dB */ 0x00005C5A, /* 59, -51dB */
101 0x0000679F, /* 60, -50dB */ 0x00007444, /* 61, -49dB */
102 0x00008274, /* 62, -48dB */ 0x0000925F, /* 63, -47dB */
103 0x0000A43B, /* 64, -46dB */ 0x0000B845, /* 65, -45dB */
104 0x0000CEC1, /* 66, -44dB */ 0x0000E7FB, /* 67, -43dB */
105 0x00010449, /* 68, -42dB */ 0x0001240C, /* 69, -41dB */
106 0x000147AE, /* 70, -40dB */ 0x00016FAA, /* 71, -39dB */
107 0x00019C86, /* 72, -38dB */ 0x0001CEDC, /* 73, -37dB */
108 0x00020756, /* 74, -36dB */ 0x000246B5, /* 75, -35dB */
109 0x00028DCF, /* 76, -34dB */ 0x0002DD96, /* 77, -33dB */
110 0x00033718, /* 78, -32dB */ 0x00039B87, /* 79, -31dB */
111 0x00040C37, /* 80, -30dB */ 0x00048AA7, /* 81, -29dB */
112 0x00051884, /* 82, -28dB */ 0x0005B7B1, /* 83, -27dB */
113 0x00066A4A, /* 84, -26dB */ 0x000732AE, /* 85, -25dB */
114 0x00081385, /* 86, -24dB */ 0x00090FCC, /* 87, -23dB */
115 0x000A2ADB, /* 88, -22dB */ 0x000B6873, /* 89, -21dB */
116 0x000CCCCD, /* 90, -20dB */ 0x000E5CA1, /* 91, -19dB */
117 0x00101D3F, /* 92, -18dB */ 0x0012149A, /* 93, -17dB */
118 0x00144961, /* 94, -16dB */ 0x0016C311, /* 95, -15dB */
119 0x00198A13, /* 96, -14dB */ 0x001CA7D7, /* 97, -13dB */
120 0x002026F3, /* 98, -12dB */ 0x00241347, /* 99, -11dB */
121 0x00287A27, /* 100, -10dB */ 0x002D6A86, /* 101, -9dB */
122 0x0032F52D, /* 102, -8dB */ 0x00392CEE, /* 103, -7dB */
123 0x004026E7, /* 104, -6dB */ 0x0047FACD, /* 105, -5dB */
124 0x0050C336, /* 106, -4dB */ 0x005A9DF8, /* 107, -3dB */
125 0x0065AC8C, /* 108, -2dB */ 0x00721483, /* 109, -1dB */
126 0x00800000, /* 110, 0dB */ 0x008F9E4D, /* 111, 1dB */
127 0x00A12478, /* 112, 2dB */ 0x00B4CE08, /* 113, 3dB */
128 0x00CADDC8, /* 114, 4dB */ 0x00E39EA9, /* 115, 5dB */
129 0x00FF64C1, /* 116, 6dB */ 0x011E8E6A, /* 117, 7dB */
130 0x0141857F, /* 118, 8dB */ 0x0168C0C6, /* 119, 9dB */
131 0x0194C584, /* 120, 10dB */ 0x01C62940, /* 121, 11dB */
132 0x01FD93C2, /* 122, 12dB */ 0x023BC148, /* 123, 13dB */
133 0x02818508, /* 124, 14dB */ 0x02CFCC01, /* 125, 15dB */
134 0x0327A01A, /* 126, 16dB */ 0x038A2BAD, /* 127, 17dB */
135 0x03F8BD7A, /* 128, 18dB */ 0x0474CD1B, /* 129, 19dB */
136 0x05000000, /* 130, 20dB */ 0x059C2F02, /* 131, 21dB */
137 0x064B6CAE, /* 132, 22dB */ 0x07100C4D, /* 133, 23dB */
138 0x07ECA9CD, /* 134, 24dB */ 0x08E43299, /* 135, 25dB */
139 0x09F9EF8E, /* 136, 26dB */ 0x0B319025, /* 137, 27dB */
140 0x0C8F36F2, /* 138, 28dB */ 0x0E1787B8, /* 139, 29dB */
141 0x0FCFB725, /* 140, 30dB */ 0x11BD9C84, /* 141, 31dB */
142 0x13E7C594, /* 142, 32dB */ 0x16558CCB, /* 143, 33dB */
143 0x190F3254, /* 144, 34dB */ 0x1C1DF80E, /* 145, 35dB */
144 0x1F8C4107, /* 146, 36dB */ 0x2365B4BF, /* 147, 37dB */
145 0x27B766C2, /* 148, 38dB */ 0x2C900313, /* 149, 39dB */
146 0x32000000, /* 150, 40dB */ 0x3819D612, /* 151, 41dB */
147 0x3EF23ECA, /* 152, 42dB */ 0x46A07B07, /* 153, 43dB */
148 0x4F3EA203, /* 154, 44dB */ 0x58E9F9F9, /* 155, 45dB */
149 0x63C35B8E, /* 156, 46dB */ 0x6FEFA16D, /* 157, 47dB */
150 0x7D982575, /* 158, 48dB */
151};
152
153#define TAS5805M_VOLUME_MAX ((int)ARRAY_SIZE(tas5805m_volume) - 1)
154#define TAS5805M_VOLUME_MIN 0
155
156struct tas5805m_priv {
157 struct i2c_client *i2c;
158 struct regulator *pvdd;
159 struct gpio_desc *gpio_pdn_n;
160
161 uint8_t *dsp_cfg_data;
162 int dsp_cfg_len;
163
164 struct regmap *regmap;
165
166 int vol[2];
167 bool is_powered;
168 bool is_muted;
169
170 struct work_struct work;
171 struct mutex lock;
172};
173
174static void set_dsp_scale(struct regmap *rm, int offset, int vol)
175{
176 uint8_t v[4];
177 uint32_t x = tas5805m_volume[vol];
178 int i;
179
180 for (i = 0; i < 4; i++) {
181 v[3 - i] = x;
182 x >>= 8;
183 }
184
185 regmap_bulk_write(map: rm, reg: offset, val: v, ARRAY_SIZE(v));
186}
187
188static void tas5805m_refresh(struct tas5805m_priv *tas5805m)
189{
190 struct regmap *rm = tas5805m->regmap;
191
192 dev_dbg(&tas5805m->i2c->dev, "refresh: is_muted=%d, vol=%d/%d\n",
193 tas5805m->is_muted, tas5805m->vol[0], tas5805m->vol[1]);
194
195 regmap_write(map: rm, REG_PAGE, val: 0x00);
196 regmap_write(map: rm, REG_BOOK, val: 0x8c);
197 regmap_write(map: rm, REG_PAGE, val: 0x2a);
198
199 /* Refresh volume. The actual volume control documented in the
200 * datasheet doesn't seem to work correctly. This is a pair of
201 * DSP registers which are *not* documented in the datasheet.
202 */
203 set_dsp_scale(rm, offset: 0x24, vol: tas5805m->vol[0]);
204 set_dsp_scale(rm, offset: 0x28, vol: tas5805m->vol[1]);
205
206 regmap_write(map: rm, REG_PAGE, val: 0x00);
207 regmap_write(map: rm, REG_BOOK, val: 0x00);
208
209 /* Set/clear digital soft-mute */
210 regmap_write(map: rm, REG_DEVICE_CTRL_2,
211 val: (tas5805m->is_muted ? DCTRL2_MUTE : 0) |
212 DCTRL2_MODE_PLAY);
213}
214
215static int tas5805m_vol_info(struct snd_kcontrol *kcontrol,
216 struct snd_ctl_elem_info *uinfo)
217{
218 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
219 uinfo->count = 2;
220
221 uinfo->value.integer.min = TAS5805M_VOLUME_MIN;
222 uinfo->value.integer.max = TAS5805M_VOLUME_MAX;
223 return 0;
224}
225
226static int tas5805m_vol_get(struct snd_kcontrol *kcontrol,
227 struct snd_ctl_elem_value *ucontrol)
228{
229 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
230 struct tas5805m_priv *tas5805m =
231 snd_soc_component_get_drvdata(c: component);
232
233 mutex_lock(&tas5805m->lock);
234 ucontrol->value.integer.value[0] = tas5805m->vol[0];
235 ucontrol->value.integer.value[1] = tas5805m->vol[1];
236 mutex_unlock(lock: &tas5805m->lock);
237
238 return 0;
239}
240
241static inline int volume_is_valid(int v)
242{
243 return (v >= TAS5805M_VOLUME_MIN) && (v <= TAS5805M_VOLUME_MAX);
244}
245
246static int tas5805m_vol_put(struct snd_kcontrol *kcontrol,
247 struct snd_ctl_elem_value *ucontrol)
248{
249 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
250 struct tas5805m_priv *tas5805m =
251 snd_soc_component_get_drvdata(c: component);
252 int ret = 0;
253
254 if (!(volume_is_valid(v: ucontrol->value.integer.value[0]) &&
255 volume_is_valid(v: ucontrol->value.integer.value[1])))
256 return -EINVAL;
257
258 mutex_lock(&tas5805m->lock);
259 if (tas5805m->vol[0] != ucontrol->value.integer.value[0] ||
260 tas5805m->vol[1] != ucontrol->value.integer.value[1]) {
261 tas5805m->vol[0] = ucontrol->value.integer.value[0];
262 tas5805m->vol[1] = ucontrol->value.integer.value[1];
263 dev_dbg(component->dev, "set vol=%d/%d (is_powered=%d)\n",
264 tas5805m->vol[0], tas5805m->vol[1],
265 tas5805m->is_powered);
266 if (tas5805m->is_powered)
267 tas5805m_refresh(tas5805m);
268 ret = 1;
269 }
270 mutex_unlock(lock: &tas5805m->lock);
271
272 return ret;
273}
274
275static const struct snd_kcontrol_new tas5805m_snd_controls[] = {
276 {
277 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
278 .name = "Master Playback Volume",
279 .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |
280 SNDRV_CTL_ELEM_ACCESS_READWRITE,
281 .info = tas5805m_vol_info,
282 .get = tas5805m_vol_get,
283 .put = tas5805m_vol_put,
284 },
285};
286
287static void send_cfg(struct regmap *rm,
288 const uint8_t *s, unsigned int len)
289{
290 unsigned int i;
291
292 for (i = 0; i + 1 < len; i += 2)
293 regmap_write(map: rm, reg: s[i], val: s[i + 1]);
294}
295
296/* The TAS5805M DSP can't be configured until the I2S clock has been
297 * present and stable for 5ms, or else it won't boot and we get no
298 * sound.
299 */
300static int tas5805m_trigger(struct snd_pcm_substream *substream, int cmd,
301 struct snd_soc_dai *dai)
302{
303 struct snd_soc_component *component = dai->component;
304 struct tas5805m_priv *tas5805m =
305 snd_soc_component_get_drvdata(c: component);
306
307 switch (cmd) {
308 case SNDRV_PCM_TRIGGER_START:
309 case SNDRV_PCM_TRIGGER_RESUME:
310 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
311 dev_dbg(component->dev, "clock start\n");
312 schedule_work(work: &tas5805m->work);
313 break;
314
315 case SNDRV_PCM_TRIGGER_STOP:
316 case SNDRV_PCM_TRIGGER_SUSPEND:
317 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
318 break;
319
320 default:
321 return -EINVAL;
322 }
323
324 return 0;
325}
326
327static void do_work(struct work_struct *work)
328{
329 struct tas5805m_priv *tas5805m =
330 container_of(work, struct tas5805m_priv, work);
331 struct regmap *rm = tas5805m->regmap;
332
333 dev_dbg(&tas5805m->i2c->dev, "DSP startup\n");
334
335 mutex_lock(&tas5805m->lock);
336 /* We mustn't issue any I2C transactions until the I2S
337 * clock is stable. Furthermore, we must allow a 5ms
338 * delay after the first set of register writes to
339 * allow the DSP to boot before configuring it.
340 */
341 usleep_range(min: 5000, max: 10000);
342 send_cfg(rm, s: dsp_cfg_preboot, ARRAY_SIZE(dsp_cfg_preboot));
343 usleep_range(min: 5000, max: 15000);
344 send_cfg(rm, s: tas5805m->dsp_cfg_data, len: tas5805m->dsp_cfg_len);
345
346 tas5805m->is_powered = true;
347 tas5805m_refresh(tas5805m);
348 mutex_unlock(lock: &tas5805m->lock);
349}
350
351static int tas5805m_dac_event(struct snd_soc_dapm_widget *w,
352 struct snd_kcontrol *kcontrol, int event)
353{
354 struct snd_soc_component *component = snd_soc_dapm_to_component(dapm: w->dapm);
355 struct tas5805m_priv *tas5805m =
356 snd_soc_component_get_drvdata(c: component);
357 struct regmap *rm = tas5805m->regmap;
358
359 if (event & SND_SOC_DAPM_PRE_PMD) {
360 unsigned int chan, global1, global2;
361
362 dev_dbg(component->dev, "DSP shutdown\n");
363 cancel_work_sync(work: &tas5805m->work);
364
365 mutex_lock(&tas5805m->lock);
366 if (tas5805m->is_powered) {
367 tas5805m->is_powered = false;
368
369 regmap_write(map: rm, REG_PAGE, val: 0x00);
370 regmap_write(map: rm, REG_BOOK, val: 0x00);
371
372 regmap_read(map: rm, REG_CHAN_FAULT, val: &chan);
373 regmap_read(map: rm, REG_GLOBAL_FAULT1, val: &global1);
374 regmap_read(map: rm, REG_GLOBAL_FAULT2, val: &global2);
375
376 dev_dbg(component->dev, "fault regs: CHAN=%02x, "
377 "GLOBAL1=%02x, GLOBAL2=%02x\n",
378 chan, global1, global2);
379
380 regmap_write(map: rm, REG_DEVICE_CTRL_2, DCTRL2_MODE_HIZ);
381 }
382 mutex_unlock(lock: &tas5805m->lock);
383 }
384
385 return 0;
386}
387
388static const struct snd_soc_dapm_route tas5805m_audio_map[] = {
389 { "DAC", NULL, "DAC IN" },
390 { "OUT", NULL, "DAC" },
391};
392
393static const struct snd_soc_dapm_widget tas5805m_dapm_widgets[] = {
394 SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0),
395 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0,
396 tas5805m_dac_event, SND_SOC_DAPM_PRE_PMD),
397 SND_SOC_DAPM_OUTPUT("OUT")
398};
399
400static const struct snd_soc_component_driver soc_codec_dev_tas5805m = {
401 .controls = tas5805m_snd_controls,
402 .num_controls = ARRAY_SIZE(tas5805m_snd_controls),
403 .dapm_widgets = tas5805m_dapm_widgets,
404 .num_dapm_widgets = ARRAY_SIZE(tas5805m_dapm_widgets),
405 .dapm_routes = tas5805m_audio_map,
406 .num_dapm_routes = ARRAY_SIZE(tas5805m_audio_map),
407 .use_pmdown_time = 1,
408 .endianness = 1,
409};
410
411static int tas5805m_mute(struct snd_soc_dai *dai, int mute, int direction)
412{
413 struct snd_soc_component *component = dai->component;
414 struct tas5805m_priv *tas5805m =
415 snd_soc_component_get_drvdata(c: component);
416
417 mutex_lock(&tas5805m->lock);
418 dev_dbg(component->dev, "set mute=%d (is_powered=%d)\n",
419 mute, tas5805m->is_powered);
420
421 tas5805m->is_muted = mute;
422 if (tas5805m->is_powered)
423 tas5805m_refresh(tas5805m);
424 mutex_unlock(lock: &tas5805m->lock);
425
426 return 0;
427}
428
429static const struct snd_soc_dai_ops tas5805m_dai_ops = {
430 .trigger = tas5805m_trigger,
431 .mute_stream = tas5805m_mute,
432 .no_capture_mute = 1,
433};
434
435static struct snd_soc_dai_driver tas5805m_dai = {
436 .name = "tas5805m-amplifier",
437 .playback = {
438 .stream_name = "Playback",
439 .channels_min = 2,
440 .channels_max = 2,
441 .rates = SNDRV_PCM_RATE_48000,
442 .formats = SNDRV_PCM_FMTBIT_S32_LE,
443 },
444 .ops = &tas5805m_dai_ops,
445};
446
447static const struct regmap_config tas5805m_regmap = {
448 .reg_bits = 8,
449 .val_bits = 8,
450
451 /* We have quite a lot of multi-level bank switching and a
452 * relatively small number of register writes between bank
453 * switches.
454 */
455 .cache_type = REGCACHE_NONE,
456};
457
458static int tas5805m_i2c_probe(struct i2c_client *i2c)
459{
460 struct device *dev = &i2c->dev;
461 struct regmap *regmap;
462 struct tas5805m_priv *tas5805m;
463 char filename[128];
464 const char *config_name;
465 const struct firmware *fw;
466 int ret;
467
468 regmap = devm_regmap_init_i2c(i2c, &tas5805m_regmap);
469 if (IS_ERR(ptr: regmap)) {
470 ret = PTR_ERR(ptr: regmap);
471 dev_err(dev, "unable to allocate register map: %d\n", ret);
472 return ret;
473 }
474
475 tas5805m = devm_kzalloc(dev, size: sizeof(*tas5805m), GFP_KERNEL);
476 if (!tas5805m)
477 return -ENOMEM;
478
479 tas5805m->i2c = i2c;
480 tas5805m->pvdd = devm_regulator_get(dev, id: "pvdd");
481 if (IS_ERR(ptr: tas5805m->pvdd)) {
482 dev_err(dev, "failed to get pvdd supply: %ld\n",
483 PTR_ERR(tas5805m->pvdd));
484 return PTR_ERR(ptr: tas5805m->pvdd);
485 }
486
487 dev_set_drvdata(dev, data: tas5805m);
488 tas5805m->regmap = regmap;
489 tas5805m->gpio_pdn_n = devm_gpiod_get(dev, con_id: "pdn", flags: GPIOD_OUT_LOW);
490 if (IS_ERR(ptr: tas5805m->gpio_pdn_n)) {
491 dev_err(dev, "error requesting PDN gpio: %ld\n",
492 PTR_ERR(tas5805m->gpio_pdn_n));
493 return PTR_ERR(ptr: tas5805m->gpio_pdn_n);
494 }
495
496 /* This configuration must be generated by PPC3. The file loaded
497 * consists of a sequence of register writes, where bytes at
498 * even indices are register addresses and those at odd indices
499 * are register values.
500 *
501 * The fixed portion of PPC3's output prior to the 5ms delay
502 * should be omitted.
503 */
504 if (device_property_read_string(dev, propname: "ti,dsp-config-name",
505 val: &config_name))
506 config_name = "default";
507
508 snprintf(buf: filename, size: sizeof(filename), fmt: "tas5805m_dsp_%s.bin",
509 config_name);
510 ret = request_firmware(fw: &fw, name: filename, device: dev);
511 if (ret)
512 return ret;
513
514 if ((fw->size < 2) || (fw->size & 1)) {
515 dev_err(dev, "firmware is invalid\n");
516 release_firmware(fw);
517 return -EINVAL;
518 }
519
520 tas5805m->dsp_cfg_len = fw->size;
521 tas5805m->dsp_cfg_data = devm_kmemdup(dev, src: fw->data, len: fw->size, GFP_KERNEL);
522 if (!tas5805m->dsp_cfg_data) {
523 release_firmware(fw);
524 return -ENOMEM;
525 }
526
527 release_firmware(fw);
528
529 /* Do the first part of the power-on here, while we can expect
530 * the I2S interface to be quiet. We must raise PDN# and then
531 * wait 5ms before any I2S clock is sent, or else the internal
532 * regulator apparently won't come on.
533 *
534 * Also, we must keep the device in power down for 100ms or so
535 * after PVDD is applied, or else the ADR pin is sampled
536 * incorrectly and the device comes up with an unpredictable I2C
537 * address.
538 */
539 tas5805m->vol[0] = TAS5805M_VOLUME_MIN;
540 tas5805m->vol[1] = TAS5805M_VOLUME_MIN;
541
542 ret = regulator_enable(regulator: tas5805m->pvdd);
543 if (ret < 0) {
544 dev_err(dev, "failed to enable pvdd: %d\n", ret);
545 return ret;
546 }
547
548 usleep_range(min: 100000, max: 150000);
549 gpiod_set_value(desc: tas5805m->gpio_pdn_n, value: 1);
550 usleep_range(min: 10000, max: 15000);
551
552 INIT_WORK(&tas5805m->work, do_work);
553 mutex_init(&tas5805m->lock);
554
555 /* Don't register through devm. We need to be able to unregister
556 * the component prior to deasserting PDN#
557 */
558 ret = snd_soc_register_component(dev, component_driver: &soc_codec_dev_tas5805m,
559 dai_drv: &tas5805m_dai, num_dai: 1);
560 if (ret < 0) {
561 dev_err(dev, "unable to register codec: %d\n", ret);
562 gpiod_set_value(desc: tas5805m->gpio_pdn_n, value: 0);
563 regulator_disable(regulator: tas5805m->pvdd);
564 return ret;
565 }
566
567 return 0;
568}
569
570static void tas5805m_i2c_remove(struct i2c_client *i2c)
571{
572 struct device *dev = &i2c->dev;
573 struct tas5805m_priv *tas5805m = dev_get_drvdata(dev);
574
575 cancel_work_sync(work: &tas5805m->work);
576 snd_soc_unregister_component(dev);
577 gpiod_set_value(desc: tas5805m->gpio_pdn_n, value: 0);
578 usleep_range(min: 10000, max: 15000);
579 regulator_disable(regulator: tas5805m->pvdd);
580}
581
582static const struct i2c_device_id tas5805m_i2c_id[] = {
583 { "tas5805m", },
584 { }
585};
586MODULE_DEVICE_TABLE(i2c, tas5805m_i2c_id);
587
588#if IS_ENABLED(CONFIG_OF)
589static const struct of_device_id tas5805m_of_match[] = {
590 { .compatible = "ti,tas5805m", },
591 { }
592};
593MODULE_DEVICE_TABLE(of, tas5805m_of_match);
594#endif
595
596static struct i2c_driver tas5805m_i2c_driver = {
597 .probe = tas5805m_i2c_probe,
598 .remove = tas5805m_i2c_remove,
599 .id_table = tas5805m_i2c_id,
600 .driver = {
601 .name = "tas5805m",
602 .of_match_table = of_match_ptr(tas5805m_of_match),
603 },
604};
605
606module_i2c_driver(tas5805m_i2c_driver);
607
608MODULE_AUTHOR("Andy Liu <andy-liu@ti.com>");
609MODULE_AUTHOR("Daniel Beer <daniel.beer@igorinstitute.com>");
610MODULE_DESCRIPTION("TAS5805M Audio Amplifier Driver");
611MODULE_LICENSE("GPL v2");
612

source code of linux/sound/soc/codecs/tas5805m.c