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3fd6e7d9 KC |
1 | /* |
2 | * TAS571x amplifier audio driver | |
3 | * | |
4 | * Copyright (C) 2015 Google, Inc. | |
5 | * Copyright (c) 2013 Daniel Mack <zonque@gmail.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/clk.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/gpio/consumer.h> | |
17 | #include <linux/i2c.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/of_device.h> | |
22 | #include <linux/regmap.h> | |
23 | #include <linux/regulator/consumer.h> | |
24 | #include <linux/stddef.h> | |
25 | #include <sound/pcm_params.h> | |
26 | #include <sound/soc.h> | |
27 | #include <sound/tlv.h> | |
28 | ||
29 | #include "tas571x.h" | |
30 | ||
31 | #define TAS571X_MAX_SUPPLIES 6 | |
32 | ||
33 | struct tas571x_chip { | |
34 | const char *const *supply_names; | |
35 | int num_supply_names; | |
36 | const struct snd_kcontrol_new *controls; | |
37 | int num_controls; | |
38 | const struct regmap_config *regmap_config; | |
39 | int vol_reg_size; | |
40 | }; | |
41 | ||
42 | struct tas571x_private { | |
43 | const struct tas571x_chip *chip; | |
44 | struct regmap *regmap; | |
45 | struct regulator_bulk_data supplies[TAS571X_MAX_SUPPLIES]; | |
46 | struct clk *mclk; | |
47 | unsigned int format; | |
48 | struct gpio_desc *reset_gpio; | |
49 | struct gpio_desc *pdn_gpio; | |
50 | struct snd_soc_codec_driver codec_driver; | |
51 | }; | |
52 | ||
53 | static int tas571x_register_size(struct tas571x_private *priv, unsigned int reg) | |
54 | { | |
55 | switch (reg) { | |
56 | case TAS571X_MVOL_REG: | |
57 | case TAS571X_CH1_VOL_REG: | |
58 | case TAS571X_CH2_VOL_REG: | |
59 | return priv->chip->vol_reg_size; | |
60 | default: | |
61 | return 1; | |
62 | } | |
63 | } | |
64 | ||
65 | static int tas571x_reg_write(void *context, unsigned int reg, | |
66 | unsigned int value) | |
67 | { | |
68 | struct i2c_client *client = context; | |
69 | struct tas571x_private *priv = i2c_get_clientdata(client); | |
70 | unsigned int i, size; | |
71 | uint8_t buf[5]; | |
72 | int ret; | |
73 | ||
74 | size = tas571x_register_size(priv, reg); | |
75 | buf[0] = reg; | |
76 | ||
77 | for (i = size; i >= 1; --i) { | |
78 | buf[i] = value; | |
79 | value >>= 8; | |
80 | } | |
81 | ||
82 | ret = i2c_master_send(client, buf, size + 1); | |
83 | if (ret == size + 1) | |
84 | return 0; | |
85 | else if (ret < 0) | |
86 | return ret; | |
87 | else | |
88 | return -EIO; | |
89 | } | |
90 | ||
91 | static int tas571x_reg_read(void *context, unsigned int reg, | |
92 | unsigned int *value) | |
93 | { | |
94 | struct i2c_client *client = context; | |
95 | struct tas571x_private *priv = i2c_get_clientdata(client); | |
96 | uint8_t send_buf, recv_buf[4]; | |
97 | struct i2c_msg msgs[2]; | |
98 | unsigned int size; | |
99 | unsigned int i; | |
100 | int ret; | |
101 | ||
102 | size = tas571x_register_size(priv, reg); | |
103 | send_buf = reg; | |
104 | ||
105 | msgs[0].addr = client->addr; | |
106 | msgs[0].len = sizeof(send_buf); | |
107 | msgs[0].buf = &send_buf; | |
108 | msgs[0].flags = 0; | |
109 | ||
110 | msgs[1].addr = client->addr; | |
111 | msgs[1].len = size; | |
112 | msgs[1].buf = recv_buf; | |
113 | msgs[1].flags = I2C_M_RD; | |
114 | ||
115 | ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); | |
116 | if (ret < 0) | |
117 | return ret; | |
118 | else if (ret != ARRAY_SIZE(msgs)) | |
119 | return -EIO; | |
120 | ||
121 | *value = 0; | |
122 | ||
123 | for (i = 0; i < size; i++) { | |
124 | *value <<= 8; | |
125 | *value |= recv_buf[i]; | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | static int tas571x_set_dai_fmt(struct snd_soc_dai *dai, unsigned int format) | |
132 | { | |
133 | struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec); | |
134 | ||
135 | priv->format = format; | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int tas571x_hw_params(struct snd_pcm_substream *substream, | |
141 | struct snd_pcm_hw_params *params, | |
142 | struct snd_soc_dai *dai) | |
143 | { | |
144 | struct tas571x_private *priv = snd_soc_codec_get_drvdata(dai->codec); | |
145 | u32 val; | |
146 | ||
147 | switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { | |
148 | case SND_SOC_DAIFMT_RIGHT_J: | |
149 | val = 0x00; | |
150 | break; | |
151 | case SND_SOC_DAIFMT_I2S: | |
152 | val = 0x03; | |
153 | break; | |
154 | case SND_SOC_DAIFMT_LEFT_J: | |
155 | val = 0x06; | |
156 | break; | |
157 | default: | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | if (params_width(params) >= 24) | |
162 | val += 2; | |
163 | else if (params_width(params) >= 20) | |
164 | val += 1; | |
165 | ||
166 | return regmap_update_bits(priv->regmap, TAS571X_SDI_REG, | |
167 | TAS571X_SDI_FMT_MASK, val); | |
168 | } | |
169 | ||
170 | static int tas571x_set_bias_level(struct snd_soc_codec *codec, | |
171 | enum snd_soc_bias_level level) | |
172 | { | |
173 | struct tas571x_private *priv = snd_soc_codec_get_drvdata(codec); | |
174 | int ret; | |
175 | ||
176 | switch (level) { | |
177 | case SND_SOC_BIAS_ON: | |
178 | break; | |
179 | case SND_SOC_BIAS_PREPARE: | |
180 | break; | |
181 | case SND_SOC_BIAS_STANDBY: | |
8f218fa9 | 182 | if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) { |
3fd6e7d9 KC |
183 | if (!IS_ERR(priv->mclk)) { |
184 | ret = clk_prepare_enable(priv->mclk); | |
185 | if (ret) { | |
186 | dev_err(codec->dev, | |
187 | "Failed to enable master clock: %d\n", | |
188 | ret); | |
189 | return ret; | |
190 | } | |
191 | } | |
192 | ||
193 | gpiod_set_value(priv->pdn_gpio, 0); | |
194 | usleep_range(5000, 6000); | |
195 | ||
196 | regcache_cache_only(priv->regmap, false); | |
197 | ret = regcache_sync(priv->regmap); | |
198 | if (ret) | |
199 | return ret; | |
200 | } | |
201 | break; | |
202 | case SND_SOC_BIAS_OFF: | |
203 | regcache_cache_only(priv->regmap, true); | |
204 | gpiod_set_value(priv->pdn_gpio, 1); | |
205 | ||
206 | if (!IS_ERR(priv->mclk)) | |
207 | clk_disable_unprepare(priv->mclk); | |
208 | break; | |
209 | } | |
210 | ||
3fd6e7d9 KC |
211 | return 0; |
212 | } | |
213 | ||
214 | static const struct snd_soc_dai_ops tas571x_dai_ops = { | |
215 | .set_fmt = tas571x_set_dai_fmt, | |
216 | .hw_params = tas571x_hw_params, | |
217 | }; | |
218 | ||
219 | static const char *const tas5711_supply_names[] = { | |
220 | "AVDD", | |
221 | "DVDD", | |
222 | "PVDD_A", | |
223 | "PVDD_B", | |
224 | "PVDD_C", | |
225 | "PVDD_D", | |
226 | }; | |
227 | ||
228 | static const DECLARE_TLV_DB_SCALE(tas5711_volume_tlv, -10350, 50, 1); | |
229 | ||
230 | static const struct snd_kcontrol_new tas5711_controls[] = { | |
231 | SOC_SINGLE_TLV("Master Volume", | |
232 | TAS571X_MVOL_REG, | |
233 | 0, 0xff, 1, tas5711_volume_tlv), | |
234 | SOC_DOUBLE_R_TLV("Speaker Volume", | |
235 | TAS571X_CH1_VOL_REG, | |
236 | TAS571X_CH2_VOL_REG, | |
237 | 0, 0xff, 1, tas5711_volume_tlv), | |
238 | SOC_DOUBLE("Speaker Switch", | |
239 | TAS571X_SOFT_MUTE_REG, | |
240 | TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT, | |
241 | 1, 1), | |
242 | }; | |
243 | ||
244 | static const struct reg_default tas5711_reg_defaults[] = { | |
245 | { 0x04, 0x05 }, | |
246 | { 0x05, 0x40 }, | |
247 | { 0x06, 0x00 }, | |
248 | { 0x07, 0xff }, | |
249 | { 0x08, 0x30 }, | |
250 | { 0x09, 0x30 }, | |
251 | { 0x1b, 0x82 }, | |
252 | }; | |
253 | ||
254 | static const struct regmap_config tas5711_regmap_config = { | |
255 | .reg_bits = 8, | |
256 | .val_bits = 32, | |
257 | .max_register = 0xff, | |
258 | .reg_read = tas571x_reg_read, | |
259 | .reg_write = tas571x_reg_write, | |
260 | .reg_defaults = tas5711_reg_defaults, | |
261 | .num_reg_defaults = ARRAY_SIZE(tas5711_reg_defaults), | |
262 | .cache_type = REGCACHE_RBTREE, | |
263 | }; | |
264 | ||
265 | static const struct tas571x_chip tas5711_chip = { | |
266 | .supply_names = tas5711_supply_names, | |
267 | .num_supply_names = ARRAY_SIZE(tas5711_supply_names), | |
268 | .controls = tas5711_controls, | |
269 | .num_controls = ARRAY_SIZE(tas5711_controls), | |
270 | .regmap_config = &tas5711_regmap_config, | |
271 | .vol_reg_size = 1, | |
272 | }; | |
273 | ||
274 | static const char *const tas5717_supply_names[] = { | |
275 | "AVDD", | |
276 | "DVDD", | |
277 | "HPVDD", | |
278 | "PVDD_AB", | |
279 | "PVDD_CD", | |
280 | }; | |
281 | ||
282 | static const DECLARE_TLV_DB_SCALE(tas5717_volume_tlv, -10375, 25, 0); | |
283 | ||
284 | static const struct snd_kcontrol_new tas5717_controls[] = { | |
285 | /* MVOL LSB is ignored - see comments in tas571x_i2c_probe() */ | |
286 | SOC_SINGLE_TLV("Master Volume", | |
287 | TAS571X_MVOL_REG, 1, 0x1ff, 1, | |
288 | tas5717_volume_tlv), | |
289 | SOC_DOUBLE_R_TLV("Speaker Volume", | |
290 | TAS571X_CH1_VOL_REG, TAS571X_CH2_VOL_REG, | |
291 | 1, 0x1ff, 1, tas5717_volume_tlv), | |
292 | SOC_DOUBLE("Speaker Switch", | |
293 | TAS571X_SOFT_MUTE_REG, | |
294 | TAS571X_SOFT_MUTE_CH1_SHIFT, TAS571X_SOFT_MUTE_CH2_SHIFT, | |
295 | 1, 1), | |
296 | }; | |
297 | ||
298 | static const struct reg_default tas5717_reg_defaults[] = { | |
299 | { 0x04, 0x05 }, | |
300 | { 0x05, 0x40 }, | |
301 | { 0x06, 0x00 }, | |
302 | { 0x07, 0x03ff }, | |
303 | { 0x08, 0x00c0 }, | |
304 | { 0x09, 0x00c0 }, | |
305 | { 0x1b, 0x82 }, | |
306 | }; | |
307 | ||
308 | static const struct regmap_config tas5717_regmap_config = { | |
309 | .reg_bits = 8, | |
310 | .val_bits = 32, | |
311 | .max_register = 0xff, | |
312 | .reg_read = tas571x_reg_read, | |
313 | .reg_write = tas571x_reg_write, | |
314 | .reg_defaults = tas5717_reg_defaults, | |
315 | .num_reg_defaults = ARRAY_SIZE(tas5717_reg_defaults), | |
316 | .cache_type = REGCACHE_RBTREE, | |
317 | }; | |
318 | ||
319 | /* This entry is reused for tas5719 as the software interface is identical. */ | |
320 | static const struct tas571x_chip tas5717_chip = { | |
321 | .supply_names = tas5717_supply_names, | |
322 | .num_supply_names = ARRAY_SIZE(tas5717_supply_names), | |
323 | .controls = tas5717_controls, | |
324 | .num_controls = ARRAY_SIZE(tas5717_controls), | |
325 | .regmap_config = &tas5717_regmap_config, | |
326 | .vol_reg_size = 2, | |
327 | }; | |
328 | ||
329 | static const struct snd_soc_dapm_widget tas571x_dapm_widgets[] = { | |
330 | SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0), | |
331 | SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0), | |
332 | ||
333 | SND_SOC_DAPM_OUTPUT("OUT_A"), | |
334 | SND_SOC_DAPM_OUTPUT("OUT_B"), | |
335 | SND_SOC_DAPM_OUTPUT("OUT_C"), | |
336 | SND_SOC_DAPM_OUTPUT("OUT_D"), | |
337 | }; | |
338 | ||
339 | static const struct snd_soc_dapm_route tas571x_dapm_routes[] = { | |
340 | { "DACL", NULL, "Playback" }, | |
341 | { "DACR", NULL, "Playback" }, | |
342 | ||
343 | { "OUT_A", NULL, "DACL" }, | |
344 | { "OUT_B", NULL, "DACL" }, | |
345 | { "OUT_C", NULL, "DACR" }, | |
346 | { "OUT_D", NULL, "DACR" }, | |
347 | }; | |
348 | ||
349 | static const struct snd_soc_codec_driver tas571x_codec = { | |
350 | .set_bias_level = tas571x_set_bias_level, | |
351 | .idle_bias_off = true, | |
352 | ||
353 | .dapm_widgets = tas571x_dapm_widgets, | |
354 | .num_dapm_widgets = ARRAY_SIZE(tas571x_dapm_widgets), | |
355 | .dapm_routes = tas571x_dapm_routes, | |
356 | .num_dapm_routes = ARRAY_SIZE(tas571x_dapm_routes), | |
357 | }; | |
358 | ||
359 | static struct snd_soc_dai_driver tas571x_dai = { | |
360 | .name = "tas571x-hifi", | |
361 | .playback = { | |
362 | .stream_name = "Playback", | |
363 | .channels_min = 2, | |
364 | .channels_max = 2, | |
365 | .rates = SNDRV_PCM_RATE_8000_48000, | |
366 | .formats = SNDRV_PCM_FMTBIT_S32_LE | | |
367 | SNDRV_PCM_FMTBIT_S24_LE | | |
368 | SNDRV_PCM_FMTBIT_S16_LE, | |
369 | }, | |
370 | .ops = &tas571x_dai_ops, | |
371 | }; | |
372 | ||
373 | static const struct of_device_id tas571x_of_match[]; | |
374 | ||
375 | static int tas571x_i2c_probe(struct i2c_client *client, | |
376 | const struct i2c_device_id *id) | |
377 | { | |
378 | struct tas571x_private *priv; | |
379 | struct device *dev = &client->dev; | |
97fceb4d | 380 | const struct of_device_id *of_id; |
3fd6e7d9 KC |
381 | int i, ret; |
382 | ||
383 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
384 | if (!priv) | |
385 | return -ENOMEM; | |
386 | i2c_set_clientdata(client, priv); | |
387 | ||
97fceb4d KC |
388 | of_id = of_match_device(tas571x_of_match, dev); |
389 | if (!of_id) { | |
3fd6e7d9 KC |
390 | dev_err(dev, "Unknown device type\n"); |
391 | return -EINVAL; | |
392 | } | |
97fceb4d | 393 | priv->chip = of_id->data; |
3fd6e7d9 KC |
394 | |
395 | priv->mclk = devm_clk_get(dev, "mclk"); | |
396 | if (IS_ERR(priv->mclk) && PTR_ERR(priv->mclk) != -ENOENT) { | |
397 | dev_err(dev, "Failed to request mclk: %ld\n", | |
398 | PTR_ERR(priv->mclk)); | |
399 | return PTR_ERR(priv->mclk); | |
400 | } | |
401 | ||
402 | BUG_ON(priv->chip->num_supply_names > TAS571X_MAX_SUPPLIES); | |
403 | for (i = 0; i < priv->chip->num_supply_names; i++) | |
404 | priv->supplies[i].supply = priv->chip->supply_names[i]; | |
405 | ||
406 | ret = devm_regulator_bulk_get(dev, priv->chip->num_supply_names, | |
407 | priv->supplies); | |
408 | if (ret) { | |
409 | dev_err(dev, "Failed to get supplies: %d\n", ret); | |
410 | return ret; | |
411 | } | |
412 | ret = regulator_bulk_enable(priv->chip->num_supply_names, | |
413 | priv->supplies); | |
414 | if (ret) { | |
415 | dev_err(dev, "Failed to enable supplies: %d\n", ret); | |
416 | return ret; | |
417 | } | |
418 | ||
419 | priv->regmap = devm_regmap_init(dev, NULL, client, | |
420 | priv->chip->regmap_config); | |
421 | if (IS_ERR(priv->regmap)) | |
422 | return PTR_ERR(priv->regmap); | |
423 | ||
424 | priv->pdn_gpio = devm_gpiod_get_optional(dev, "pdn", GPIOD_OUT_LOW); | |
425 | if (IS_ERR(priv->pdn_gpio)) { | |
426 | dev_err(dev, "error requesting pdn_gpio: %ld\n", | |
427 | PTR_ERR(priv->pdn_gpio)); | |
428 | return PTR_ERR(priv->pdn_gpio); | |
429 | } | |
430 | ||
431 | priv->reset_gpio = devm_gpiod_get_optional(dev, "reset", | |
432 | GPIOD_OUT_HIGH); | |
433 | if (IS_ERR(priv->reset_gpio)) { | |
434 | dev_err(dev, "error requesting reset_gpio: %ld\n", | |
435 | PTR_ERR(priv->reset_gpio)); | |
436 | return PTR_ERR(priv->reset_gpio); | |
437 | } else if (priv->reset_gpio) { | |
438 | /* pulse the active low reset line for ~100us */ | |
439 | usleep_range(100, 200); | |
440 | gpiod_set_value(priv->reset_gpio, 0); | |
441 | usleep_range(12000, 20000); | |
442 | } | |
443 | ||
444 | ret = regmap_write(priv->regmap, TAS571X_OSC_TRIM_REG, 0); | |
445 | if (ret) | |
446 | return ret; | |
447 | ||
448 | ret = regmap_update_bits(priv->regmap, TAS571X_SYS_CTRL_2_REG, | |
449 | TAS571X_SYS_CTRL_2_SDN_MASK, 0); | |
450 | if (ret) | |
451 | return ret; | |
452 | ||
453 | memcpy(&priv->codec_driver, &tas571x_codec, sizeof(priv->codec_driver)); | |
454 | priv->codec_driver.controls = priv->chip->controls; | |
455 | priv->codec_driver.num_controls = priv->chip->num_controls; | |
456 | ||
457 | if (priv->chip->vol_reg_size == 2) { | |
458 | /* | |
459 | * The master volume defaults to 0x3ff (mute), but we ignore | |
460 | * (zero) the LSB because the hardware step size is 0.125 dB | |
461 | * and TLV_DB_SCALE_ITEM has a resolution of 0.01 dB. | |
462 | */ | |
463 | ret = regmap_update_bits(priv->regmap, TAS571X_MVOL_REG, 1, 0); | |
464 | if (ret) | |
465 | return ret; | |
466 | } | |
467 | ||
468 | regcache_cache_only(priv->regmap, true); | |
469 | gpiod_set_value(priv->pdn_gpio, 1); | |
470 | ||
471 | return snd_soc_register_codec(&client->dev, &priv->codec_driver, | |
472 | &tas571x_dai, 1); | |
473 | } | |
474 | ||
475 | static int tas571x_i2c_remove(struct i2c_client *client) | |
476 | { | |
477 | struct tas571x_private *priv = i2c_get_clientdata(client); | |
478 | ||
479 | snd_soc_unregister_codec(&client->dev); | |
480 | regulator_bulk_disable(priv->chip->num_supply_names, priv->supplies); | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static const struct of_device_id tas571x_of_match[] = { | |
486 | { .compatible = "ti,tas5711", .data = &tas5711_chip, }, | |
487 | { .compatible = "ti,tas5717", .data = &tas5717_chip, }, | |
488 | { .compatible = "ti,tas5719", .data = &tas5717_chip, }, | |
489 | { } | |
490 | }; | |
491 | MODULE_DEVICE_TABLE(of, tas571x_of_match); | |
492 | ||
493 | static const struct i2c_device_id tas571x_i2c_id[] = { | |
494 | { "tas5711", 0 }, | |
495 | { "tas5717", 0 }, | |
496 | { "tas5719", 0 }, | |
497 | { } | |
498 | }; | |
499 | MODULE_DEVICE_TABLE(i2c, tas571x_i2c_id); | |
500 | ||
501 | static struct i2c_driver tas571x_i2c_driver = { | |
502 | .driver = { | |
503 | .name = "tas571x", | |
504 | .of_match_table = of_match_ptr(tas571x_of_match), | |
505 | }, | |
506 | .probe = tas571x_i2c_probe, | |
507 | .remove = tas571x_i2c_remove, | |
508 | .id_table = tas571x_i2c_id, | |
509 | }; | |
510 | module_i2c_driver(tas571x_i2c_driver); | |
511 | ||
512 | MODULE_DESCRIPTION("ASoC TAS571x driver"); | |
513 | MODULE_AUTHOR("Kevin Cernekee <cernekee@chromium.org>"); | |
514 | MODULE_LICENSE("GPL"); |