1 /*
2 * tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
3 *
4 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
5 *
6 * Author: Dan Murphy <dmurphy@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 */
17
18 #include <linux/module.h>
19 #include <linux/errno.h>
20 #include <linux/device.h>
21 #include <linux/i2c.h>
22 #include <linux/gpio.h>
23 #include <linux/of_gpio.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/regmap.h>
26 #include <linux/slab.h>
27
28 #include <linux/gpio/consumer.h>
29 #include <linux/regulator/consumer.h>
30
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/soc.h>
34 #include <sound/soc-dapm.h>
35 #include <sound/tlv.h>
36 #include <sound/tas2552-plat.h>
37
38 #include "tas2552.h"
39
40 static struct reg_default tas2552_reg_defs[] = {
41 {TAS2552_CFG_1, 0x22},
42 {TAS2552_CFG_3, 0x80},
43 {TAS2552_DOUT, 0x00},
44 {TAS2552_OUTPUT_DATA, 0xc0},
45 {TAS2552_PDM_CFG, 0x01},
46 {TAS2552_PGA_GAIN, 0x00},
47 {TAS2552_BOOST_PT_CTRL, 0x0f},
48 {TAS2552_RESERVED_0D, 0x00},
49 {TAS2552_LIMIT_RATE_HYS, 0x08},
50 {TAS2552_CFG_2, 0xef},
51 {TAS2552_SER_CTRL_1, 0x00},
52 {TAS2552_SER_CTRL_2, 0x00},
53 {TAS2552_PLL_CTRL_1, 0x10},
54 {TAS2552_PLL_CTRL_2, 0x00},
55 {TAS2552_PLL_CTRL_3, 0x00},
56 {TAS2552_BTIP, 0x8f},
57 {TAS2552_BTS_CTRL, 0x80},
58 {TAS2552_LIMIT_RELEASE, 0x04},
59 {TAS2552_LIMIT_INT_COUNT, 0x00},
60 {TAS2552_EDGE_RATE_CTRL, 0x40},
61 {TAS2552_VBAT_DATA, 0x00},
62 };
63
64 #define TAS2552_NUM_SUPPLIES 3
65 static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
66 "vbat", /* vbat voltage */
67 "iovdd", /* I/O Voltage */
68 "avdd", /* Analog DAC Voltage */
69 };
70
71 struct tas2552_data {
72 struct snd_soc_codec *codec;
73 struct regmap *regmap;
74 struct i2c_client *tas2552_client;
75 struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
76 struct gpio_desc *enable_gpio;
77 unsigned char regs[TAS2552_VBAT_DATA];
78 unsigned int mclk;
79 };
80
81 /* Input mux controls */
82 static const char *tas2552_input_texts[] = {
83 "Digital", "Analog"
84 };
85
86 static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
87 tas2552_input_texts);
88
89 static const struct snd_kcontrol_new tas2552_input_mux_control[] = {
90 SOC_DAPM_ENUM("Input selection", tas2552_input_mux_enum)
91 };
92
93 static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
94 {
95 SND_SOC_DAPM_INPUT("IN"),
96
97 /* MUX Controls */
98 SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
99 tas2552_input_mux_control),
100
101 SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
102 SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
103 SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
104 SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
105
106 SND_SOC_DAPM_OUTPUT("OUT")
107 };
108
109 static const struct snd_soc_dapm_route tas2552_audio_map[] = {
110 {"DAC", NULL, "DAC IN"},
111 {"Input selection", "Digital", "DAC"},
112 {"Input selection", "Analog", "IN"},
113 {"ClassD", NULL, "Input selection"},
114 {"OUT", NULL, "ClassD"},
115 {"ClassD", NULL, "PLL"},
116 };
117
118 #ifdef CONFIG_PM
tas2552_sw_shutdown(struct tas2552_data * tas_data,int sw_shutdown)119 static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
120 {
121 u8 cfg1_reg;
122
123 if (!tas_data->codec)
124 return;
125
126 if (sw_shutdown)
127 cfg1_reg = 0;
128 else
129 cfg1_reg = TAS2552_SWS_MASK;
130
131 snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1,
132 TAS2552_SWS_MASK, cfg1_reg);
133 }
134 #endif
135
tas2552_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)136 static int tas2552_hw_params(struct snd_pcm_substream *substream,
137 struct snd_pcm_hw_params *params,
138 struct snd_soc_dai *dai)
139 {
140 struct snd_soc_codec *codec = dai->codec;
141 struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
142 int sample_rate, pll_clk;
143 int d;
144 u8 p, j;
145
146 if (!tas2552->mclk)
147 return -EINVAL;
148
149 snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
150
151 if (tas2552->mclk == TAS2552_245MHZ_CLK ||
152 tas2552->mclk == TAS2552_225MHZ_CLK) {
153 /* By pass the PLL configuration */
154 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
155 TAS2552_PLL_BYPASS_MASK,
156 TAS2552_PLL_BYPASS);
157 } else {
158 /* Fill in the PLL control registers for J & D
159 * PLL_CLK = (.5 * freq * J.D) / 2^p
160 * Need to fill in J and D here based on incoming freq
161 */
162 p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
163 p = (p >> 7);
164 sample_rate = params_rate(params);
165
166 if (sample_rate == 48000)
167 pll_clk = TAS2552_245MHZ_CLK;
168 else if (sample_rate == 44100)
169 pll_clk = TAS2552_225MHZ_CLK;
170 else {
171 dev_vdbg(codec->dev, "Substream sample rate is not found %i\n",
172 params_rate(params));
173 return -EINVAL;
174 }
175
176 j = (pll_clk * 2 * (1 << p)) / tas2552->mclk;
177 d = (pll_clk * 2 * (1 << p)) % tas2552->mclk;
178
179 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
180 TAS2552_PLL_J_MASK, j);
181 snd_soc_write(codec, TAS2552_PLL_CTRL_2,
182 (d >> 7) & TAS2552_PLL_D_UPPER_MASK);
183 snd_soc_write(codec, TAS2552_PLL_CTRL_3,
184 d & TAS2552_PLL_D_LOWER_MASK);
185
186 }
187
188 return 0;
189 }
190
tas2552_set_dai_fmt(struct snd_soc_dai * dai,unsigned int fmt)191 static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
192 {
193 struct snd_soc_codec *codec = dai->codec;
194 u8 serial_format;
195 u8 serial_control_mask;
196
197 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
198 case SND_SOC_DAIFMT_CBS_CFS:
199 serial_format = 0x00;
200 break;
201 case SND_SOC_DAIFMT_CBS_CFM:
202 serial_format = TAS2552_WORD_CLK_MASK;
203 break;
204 case SND_SOC_DAIFMT_CBM_CFS:
205 serial_format = TAS2552_BIT_CLK_MASK;
206 break;
207 case SND_SOC_DAIFMT_CBM_CFM:
208 serial_format = (TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK);
209 break;
210 default:
211 dev_vdbg(codec->dev, "DAI Format master is not found\n");
212 return -EINVAL;
213 }
214
215 serial_control_mask = TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK;
216
217 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
218 case SND_SOC_DAIFMT_I2S:
219 serial_format &= TAS2552_DAIFMT_I2S_MASK;
220 break;
221 case SND_SOC_DAIFMT_DSP_A:
222 serial_format |= TAS2552_DAIFMT_DSP;
223 break;
224 case SND_SOC_DAIFMT_RIGHT_J:
225 serial_format |= TAS2552_DAIFMT_RIGHT_J;
226 break;
227 case SND_SOC_DAIFMT_LEFT_J:
228 serial_format |= TAS2552_DAIFMT_LEFT_J;
229 break;
230 default:
231 dev_vdbg(codec->dev, "DAI Format is not found\n");
232 return -EINVAL;
233 }
234
235 if (fmt & SND_SOC_DAIFMT_FORMAT_MASK)
236 serial_control_mask |= TAS2552_DATA_FORMAT_MASK;
237
238 snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, serial_control_mask,
239 serial_format);
240
241 return 0;
242 }
243
tas2552_set_dai_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)244 static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
245 unsigned int freq, int dir)
246 {
247 struct snd_soc_codec *codec = dai->codec;
248 struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
249
250 tas2552->mclk = freq;
251
252 return 0;
253 }
254
tas2552_mute(struct snd_soc_dai * dai,int mute)255 static int tas2552_mute(struct snd_soc_dai *dai, int mute)
256 {
257 u8 cfg1_reg;
258 struct snd_soc_codec *codec = dai->codec;
259
260 if (mute)
261 cfg1_reg = TAS2552_MUTE_MASK;
262 else
263 cfg1_reg = ~TAS2552_MUTE_MASK;
264
265 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK, cfg1_reg);
266
267 return 0;
268 }
269
270 #ifdef CONFIG_PM
tas2552_runtime_suspend(struct device * dev)271 static int tas2552_runtime_suspend(struct device *dev)
272 {
273 struct tas2552_data *tas2552 = dev_get_drvdata(dev);
274
275 tas2552_sw_shutdown(tas2552, 0);
276
277 regcache_cache_only(tas2552->regmap, true);
278 regcache_mark_dirty(tas2552->regmap);
279
280 if (tas2552->enable_gpio)
281 gpiod_set_value(tas2552->enable_gpio, 0);
282
283 return 0;
284 }
285
tas2552_runtime_resume(struct device * dev)286 static int tas2552_runtime_resume(struct device *dev)
287 {
288 struct tas2552_data *tas2552 = dev_get_drvdata(dev);
289
290 if (tas2552->enable_gpio)
291 gpiod_set_value(tas2552->enable_gpio, 1);
292
293 tas2552_sw_shutdown(tas2552, 1);
294
295 regcache_cache_only(tas2552->regmap, false);
296 regcache_sync(tas2552->regmap);
297
298 return 0;
299 }
300 #endif
301
302 static const struct dev_pm_ops tas2552_pm = {
303 SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
304 NULL)
305 };
306
307 static struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
308 .hw_params = tas2552_hw_params,
309 .set_sysclk = tas2552_set_dai_sysclk,
310 .set_fmt = tas2552_set_dai_fmt,
311 .digital_mute = tas2552_mute,
312 };
313
314 /* Formats supported by TAS2552 driver. */
315 #define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
316 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
317
318 /* TAS2552 dai structure. */
319 static struct snd_soc_dai_driver tas2552_dai[] = {
320 {
321 .name = "tas2552-amplifier",
322 .playback = {
323 .stream_name = "Playback",
324 .channels_min = 2,
325 .channels_max = 2,
326 .rates = SNDRV_PCM_RATE_8000_192000,
327 .formats = TAS2552_FORMATS,
328 },
329 .ops = &tas2552_speaker_dai_ops,
330 },
331 };
332
333 /*
334 * DAC digital volumes. From -7 to 24 dB in 1 dB steps
335 */
336 static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 24);
337
338 static const struct snd_kcontrol_new tas2552_snd_controls[] = {
339 SOC_SINGLE_TLV("Speaker Driver Playback Volume",
340 TAS2552_PGA_GAIN, 0, 0x1f, 1, dac_tlv),
341 };
342
343 static const struct reg_default tas2552_init_regs[] = {
344 { TAS2552_RESERVED_0D, 0xc0 },
345 };
346
tas2552_codec_probe(struct snd_soc_codec * codec)347 static int tas2552_codec_probe(struct snd_soc_codec *codec)
348 {
349 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
350 int ret;
351
352 tas2552->codec = codec;
353
354 ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
355 tas2552->supplies);
356
357 if (ret != 0) {
358 dev_err(codec->dev, "Failed to enable supplies: %d\n",
359 ret);
360 return ret;
361 }
362
363 if (tas2552->enable_gpio)
364 gpiod_set_value(tas2552->enable_gpio, 1);
365
366 ret = pm_runtime_get_sync(codec->dev);
367 if (ret < 0) {
368 dev_err(codec->dev, "Enabling device failed: %d\n",
369 ret);
370 goto probe_fail;
371 }
372
373 snd_soc_write(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK |
374 TAS2552_PLL_SRC_BCLK);
375 snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
376 TAS2552_DIN_SRC_SEL_AVG_L_R | TAS2552_88_96KHZ);
377 snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I);
378 snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I | 0x8);
379 snd_soc_write(codec, TAS2552_PDM_CFG, TAS2552_PDM_BCLK_SEL);
380 snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 |
381 TAS2552_APT_THRESH_2_1_7);
382
383 ret = regmap_register_patch(tas2552->regmap, tas2552_init_regs,
384 ARRAY_SIZE(tas2552_init_regs));
385 if (ret != 0) {
386 dev_err(codec->dev, "Failed to write init registers: %d\n",
387 ret);
388 goto patch_fail;
389 }
390
391 snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN |
392 TAS2552_APT_EN | TAS2552_LIM_EN);
393
394 return 0;
395
396 patch_fail:
397 pm_runtime_put(codec->dev);
398 probe_fail:
399 if (tas2552->enable_gpio)
400 gpiod_set_value(tas2552->enable_gpio, 0);
401
402 regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
403 tas2552->supplies);
404 return -EIO;
405 }
406
tas2552_codec_remove(struct snd_soc_codec * codec)407 static int tas2552_codec_remove(struct snd_soc_codec *codec)
408 {
409 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
410
411 pm_runtime_put(codec->dev);
412
413 if (tas2552->enable_gpio)
414 gpiod_set_value(tas2552->enable_gpio, 0);
415
416 return 0;
417 };
418
419 #ifdef CONFIG_PM
tas2552_suspend(struct snd_soc_codec * codec)420 static int tas2552_suspend(struct snd_soc_codec *codec)
421 {
422 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
423 int ret;
424
425 ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
426 tas2552->supplies);
427
428 if (ret != 0)
429 dev_err(codec->dev, "Failed to disable supplies: %d\n",
430 ret);
431 return 0;
432 }
433
tas2552_resume(struct snd_soc_codec * codec)434 static int tas2552_resume(struct snd_soc_codec *codec)
435 {
436 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
437 int ret;
438
439 ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
440 tas2552->supplies);
441
442 if (ret != 0) {
443 dev_err(codec->dev, "Failed to enable supplies: %d\n",
444 ret);
445 }
446
447 return 0;
448 }
449 #else
450 #define tas2552_suspend NULL
451 #define tas2552_resume NULL
452 #endif
453
454 static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
455 .probe = tas2552_codec_probe,
456 .remove = tas2552_codec_remove,
457 .suspend = tas2552_suspend,
458 .resume = tas2552_resume,
459 .controls = tas2552_snd_controls,
460 .num_controls = ARRAY_SIZE(tas2552_snd_controls),
461 .dapm_widgets = tas2552_dapm_widgets,
462 .num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets),
463 .dapm_routes = tas2552_audio_map,
464 .num_dapm_routes = ARRAY_SIZE(tas2552_audio_map),
465 };
466
467 static const struct regmap_config tas2552_regmap_config = {
468 .reg_bits = 8,
469 .val_bits = 8,
470
471 .max_register = TAS2552_MAX_REG,
472 .reg_defaults = tas2552_reg_defs,
473 .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
474 .cache_type = REGCACHE_RBTREE,
475 };
476
tas2552_probe(struct i2c_client * client,const struct i2c_device_id * id)477 static int tas2552_probe(struct i2c_client *client,
478 const struct i2c_device_id *id)
479 {
480 struct device *dev;
481 struct tas2552_data *data;
482 int ret;
483 int i;
484
485 dev = &client->dev;
486 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
487 if (data == NULL)
488 return -ENOMEM;
489
490 data->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
491 if (IS_ERR(data->enable_gpio))
492 return PTR_ERR(data->enable_gpio);
493
494 data->tas2552_client = client;
495 data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
496 if (IS_ERR(data->regmap)) {
497 ret = PTR_ERR(data->regmap);
498 dev_err(&client->dev, "Failed to allocate register map: %d\n",
499 ret);
500 return ret;
501 }
502
503 for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
504 data->supplies[i].supply = tas2552_supply_names[i];
505
506 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
507 data->supplies);
508 if (ret != 0) {
509 dev_err(dev, "Failed to request supplies: %d\n", ret);
510 return ret;
511 }
512
513 pm_runtime_set_active(&client->dev);
514 pm_runtime_set_autosuspend_delay(&client->dev, 1000);
515 pm_runtime_use_autosuspend(&client->dev);
516 pm_runtime_enable(&client->dev);
517 pm_runtime_mark_last_busy(&client->dev);
518 pm_runtime_put_sync_autosuspend(&client->dev);
519
520 dev_set_drvdata(&client->dev, data);
521
522 ret = snd_soc_register_codec(&client->dev,
523 &soc_codec_dev_tas2552,
524 tas2552_dai, ARRAY_SIZE(tas2552_dai));
525 if (ret < 0)
526 dev_err(&client->dev, "Failed to register codec: %d\n", ret);
527
528 return ret;
529 }
530
tas2552_i2c_remove(struct i2c_client * client)531 static int tas2552_i2c_remove(struct i2c_client *client)
532 {
533 snd_soc_unregister_codec(&client->dev);
534 return 0;
535 }
536
537 static const struct i2c_device_id tas2552_id[] = {
538 { "tas2552", 0 },
539 { }
540 };
541 MODULE_DEVICE_TABLE(i2c, tas2552_id);
542
543 #if IS_ENABLED(CONFIG_OF)
544 static const struct of_device_id tas2552_of_match[] = {
545 { .compatible = "ti,tas2552", },
546 {},
547 };
548 MODULE_DEVICE_TABLE(of, tas2552_of_match);
549 #endif
550
551 static struct i2c_driver tas2552_i2c_driver = {
552 .driver = {
553 .name = "tas2552",
554 .owner = THIS_MODULE,
555 .of_match_table = of_match_ptr(tas2552_of_match),
556 .pm = &tas2552_pm,
557 },
558 .probe = tas2552_probe,
559 .remove = tas2552_i2c_remove,
560 .id_table = tas2552_id,
561 };
562
563 module_i2c_driver(tas2552_i2c_driver);
564
565 MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
566 MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
567 MODULE_LICENSE("GPL");
568