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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
40static 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
65static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
66 "vbat",
67 "iovdd",
68 "avdd",
69};
70
71struct 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
82static const char *tas2552_input_texts[] = {
83 "Digital", "Analog"
84};
85
86static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
87 tas2552_input_texts);
88
89static const struct snd_kcontrol_new tas2552_input_mux_control[] = {
90 SOC_DAPM_ENUM("Input selection", tas2552_input_mux_enum)
91};
92
93static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
94{
95 SND_SOC_DAPM_INPUT("IN"),
96
97
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
109static 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
119static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
120{
121 u8 cfg1_reg;
122
123 if (sw_shutdown)
124 cfg1_reg = 0;
125 else
126 cfg1_reg = TAS2552_SWS_MASK;
127
128 snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1,
129 TAS2552_SWS_MASK, cfg1_reg);
130}
131#endif
132
133static int tas2552_hw_params(struct snd_pcm_substream *substream,
134 struct snd_pcm_hw_params *params,
135 struct snd_soc_dai *dai)
136{
137 struct snd_soc_codec *codec = dai->codec;
138 struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
139 int sample_rate, pll_clk;
140 int d;
141 u8 p, j;
142
143 if (!tas2552->mclk)
144 return -EINVAL;
145
146 snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
147
148 if (tas2552->mclk == TAS2552_245MHZ_CLK ||
149 tas2552->mclk == TAS2552_225MHZ_CLK) {
150
151 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
152 TAS2552_PLL_BYPASS_MASK,
153 TAS2552_PLL_BYPASS);
154 } else {
155
156
157
158
159 p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
160 p = (p >> 7);
161 sample_rate = params_rate(params);
162
163 if (sample_rate == 48000)
164 pll_clk = TAS2552_245MHZ_CLK;
165 else if (sample_rate == 44100)
166 pll_clk = TAS2552_225MHZ_CLK;
167 else {
168 dev_vdbg(codec->dev, "Substream sample rate is not found %i\n",
169 params_rate(params));
170 return -EINVAL;
171 }
172
173 j = (pll_clk * 2 * (1 << p)) / tas2552->mclk;
174 d = (pll_clk * 2 * (1 << p)) % tas2552->mclk;
175
176 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
177 TAS2552_PLL_J_MASK, j);
178 snd_soc_write(codec, TAS2552_PLL_CTRL_2,
179 (d >> 7) & TAS2552_PLL_D_UPPER_MASK);
180 snd_soc_write(codec, TAS2552_PLL_CTRL_3,
181 d & TAS2552_PLL_D_LOWER_MASK);
182
183 }
184
185 return 0;
186}
187
188static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
189{
190 struct snd_soc_codec *codec = dai->codec;
191 u8 serial_format;
192 u8 serial_control_mask;
193
194 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
195 case SND_SOC_DAIFMT_CBS_CFS:
196 serial_format = 0x00;
197 break;
198 case SND_SOC_DAIFMT_CBS_CFM:
199 serial_format = TAS2552_WORD_CLK_MASK;
200 break;
201 case SND_SOC_DAIFMT_CBM_CFS:
202 serial_format = TAS2552_BIT_CLK_MASK;
203 break;
204 case SND_SOC_DAIFMT_CBM_CFM:
205 serial_format = (TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK);
206 break;
207 default:
208 dev_vdbg(codec->dev, "DAI Format master is not found\n");
209 return -EINVAL;
210 }
211
212 serial_control_mask = TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK;
213
214 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
215 case SND_SOC_DAIFMT_I2S:
216 serial_format &= TAS2552_DAIFMT_I2S_MASK;
217 break;
218 case SND_SOC_DAIFMT_DSP_A:
219 serial_format |= TAS2552_DAIFMT_DSP;
220 break;
221 case SND_SOC_DAIFMT_RIGHT_J:
222 serial_format |= TAS2552_DAIFMT_RIGHT_J;
223 break;
224 case SND_SOC_DAIFMT_LEFT_J:
225 serial_format |= TAS2552_DAIFMT_LEFT_J;
226 break;
227 default:
228 dev_vdbg(codec->dev, "DAI Format is not found\n");
229 return -EINVAL;
230 }
231
232 if (fmt & SND_SOC_DAIFMT_FORMAT_MASK)
233 serial_control_mask |= TAS2552_DATA_FORMAT_MASK;
234
235 snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, serial_control_mask,
236 serial_format);
237
238 return 0;
239}
240
241static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
242 unsigned int freq, int dir)
243{
244 struct snd_soc_codec *codec = dai->codec;
245 struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
246
247 tas2552->mclk = freq;
248
249 return 0;
250}
251
252static int tas2552_mute(struct snd_soc_dai *dai, int mute)
253{
254 u8 cfg1_reg;
255 struct snd_soc_codec *codec = dai->codec;
256
257 if (mute)
258 cfg1_reg = TAS2552_MUTE_MASK;
259 else
260 cfg1_reg = ~TAS2552_MUTE_MASK;
261
262 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK, cfg1_reg);
263
264 return 0;
265}
266
267#ifdef CONFIG_PM
268static int tas2552_runtime_suspend(struct device *dev)
269{
270 struct tas2552_data *tas2552 = dev_get_drvdata(dev);
271
272 tas2552_sw_shutdown(tas2552, 0);
273
274 regcache_cache_only(tas2552->regmap, true);
275 regcache_mark_dirty(tas2552->regmap);
276
277 if (tas2552->enable_gpio)
278 gpiod_set_value(tas2552->enable_gpio, 0);
279
280 return 0;
281}
282
283static int tas2552_runtime_resume(struct device *dev)
284{
285 struct tas2552_data *tas2552 = dev_get_drvdata(dev);
286
287 if (tas2552->enable_gpio)
288 gpiod_set_value(tas2552->enable_gpio, 1);
289
290 tas2552_sw_shutdown(tas2552, 1);
291
292 regcache_cache_only(tas2552->regmap, false);
293 regcache_sync(tas2552->regmap);
294
295 return 0;
296}
297#endif
298
299static const struct dev_pm_ops tas2552_pm = {
300 SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
301 NULL)
302};
303
304static struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
305 .hw_params = tas2552_hw_params,
306 .set_sysclk = tas2552_set_dai_sysclk,
307 .set_fmt = tas2552_set_dai_fmt,
308 .digital_mute = tas2552_mute,
309};
310
311
312#define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
313 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
314
315
316static struct snd_soc_dai_driver tas2552_dai[] = {
317 {
318 .name = "tas2552-amplifier",
319 .playback = {
320 .stream_name = "Playback",
321 .channels_min = 2,
322 .channels_max = 2,
323 .rates = SNDRV_PCM_RATE_8000_192000,
324 .formats = TAS2552_FORMATS,
325 },
326 .ops = &tas2552_speaker_dai_ops,
327 },
328};
329
330
331
332
333static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 24);
334
335static const struct snd_kcontrol_new tas2552_snd_controls[] = {
336 SOC_SINGLE_TLV("Speaker Driver Playback Volume",
337 TAS2552_PGA_GAIN, 0, 0x1f, 1, dac_tlv),
338 SOC_DAPM_SINGLE("Playback AMP", SND_SOC_NOPM, 0, 1, 0),
339};
340
341static const struct reg_default tas2552_init_regs[] = {
342 { TAS2552_RESERVED_0D, 0xc0 },
343};
344
345static int tas2552_codec_probe(struct snd_soc_codec *codec)
346{
347 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
348 int ret;
349
350 tas2552->codec = codec;
351
352 ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
353 tas2552->supplies);
354
355 if (ret != 0) {
356 dev_err(codec->dev, "Failed to enable supplies: %d\n",
357 ret);
358 return ret;
359 }
360
361 if (tas2552->enable_gpio)
362 gpiod_set_value(tas2552->enable_gpio, 1);
363
364 ret = pm_runtime_get_sync(codec->dev);
365 if (ret < 0) {
366 dev_err(codec->dev, "Enabling device failed: %d\n",
367 ret);
368 goto probe_fail;
369 }
370
371 snd_soc_write(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK |
372 TAS2552_PLL_SRC_BCLK);
373 snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
374 TAS2552_DIN_SRC_SEL_AVG_L_R | TAS2552_88_96KHZ);
375 snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I);
376 snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I | 0x8);
377 snd_soc_write(codec, TAS2552_PDM_CFG, TAS2552_PDM_BCLK_SEL);
378 snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 |
379 TAS2552_APT_THRESH_2_1_7);
380
381 ret = regmap_register_patch(tas2552->regmap, tas2552_init_regs,
382 ARRAY_SIZE(tas2552_init_regs));
383 if (ret != 0) {
384 dev_err(codec->dev, "Failed to write init registers: %d\n",
385 ret);
386 goto patch_fail;
387 }
388
389 snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN |
390 TAS2552_APT_EN | TAS2552_LIM_EN);
391
392 return 0;
393
394patch_fail:
395 pm_runtime_put(codec->dev);
396probe_fail:
397 if (tas2552->enable_gpio)
398 gpiod_set_value(tas2552->enable_gpio, 0);
399
400 regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
401 tas2552->supplies);
402 return -EIO;
403}
404
405static int tas2552_codec_remove(struct snd_soc_codec *codec)
406{
407 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
408
409 pm_runtime_put(codec->dev);
410
411 if (tas2552->enable_gpio)
412 gpiod_set_value(tas2552->enable_gpio, 0);
413
414 return 0;
415};
416
417#ifdef CONFIG_PM
418static int tas2552_suspend(struct snd_soc_codec *codec)
419{
420 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
421 int ret;
422
423 ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
424 tas2552->supplies);
425
426 if (ret != 0)
427 dev_err(codec->dev, "Failed to disable supplies: %d\n",
428 ret);
429 return 0;
430}
431
432static int tas2552_resume(struct snd_soc_codec *codec)
433{
434 struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
435 int ret;
436
437 ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
438 tas2552->supplies);
439
440 if (ret != 0) {
441 dev_err(codec->dev, "Failed to enable supplies: %d\n",
442 ret);
443 }
444
445 return 0;
446}
447#else
448#define tas2552_suspend NULL
449#define tas2552_resume NULL
450#endif
451
452static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
453 .probe = tas2552_codec_probe,
454 .remove = tas2552_codec_remove,
455 .suspend = tas2552_suspend,
456 .resume = tas2552_resume,
457 .controls = tas2552_snd_controls,
458 .num_controls = ARRAY_SIZE(tas2552_snd_controls),
459 .dapm_widgets = tas2552_dapm_widgets,
460 .num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets),
461 .dapm_routes = tas2552_audio_map,
462 .num_dapm_routes = ARRAY_SIZE(tas2552_audio_map),
463};
464
465static const struct regmap_config tas2552_regmap_config = {
466 .reg_bits = 8,
467 .val_bits = 8,
468
469 .max_register = TAS2552_MAX_REG,
470 .reg_defaults = tas2552_reg_defs,
471 .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
472 .cache_type = REGCACHE_RBTREE,
473};
474
475static int tas2552_probe(struct i2c_client *client,
476 const struct i2c_device_id *id)
477{
478 struct device *dev;
479 struct tas2552_data *data;
480 int ret;
481 int i;
482
483 dev = &client->dev;
484 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
485 if (data == NULL)
486 return -ENOMEM;
487
488 data->enable_gpio = devm_gpiod_get(dev, "enable");
489 if (IS_ERR(data->enable_gpio)) {
490 ret = PTR_ERR(data->enable_gpio);
491 if (ret != -ENOENT && ret != -ENOSYS)
492 return ret;
493
494 data->enable_gpio = NULL;
495 } else {
496 gpiod_direction_output(data->enable_gpio, 0);
497 }
498
499 data->tas2552_client = client;
500 data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
501 if (IS_ERR(data->regmap)) {
502 ret = PTR_ERR(data->regmap);
503 dev_err(&client->dev, "Failed to allocate register map: %d\n",
504 ret);
505 return ret;
506 }
507
508 for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
509 data->supplies[i].supply = tas2552_supply_names[i];
510
511 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
512 data->supplies);
513 if (ret != 0) {
514 dev_err(dev, "Failed to request supplies: %d\n", ret);
515 return ret;
516 }
517
518 pm_runtime_set_active(&client->dev);
519 pm_runtime_set_autosuspend_delay(&client->dev, 1000);
520 pm_runtime_use_autosuspend(&client->dev);
521 pm_runtime_enable(&client->dev);
522 pm_runtime_mark_last_busy(&client->dev);
523 pm_runtime_put_sync_autosuspend(&client->dev);
524
525 dev_set_drvdata(&client->dev, data);
526
527 ret = snd_soc_register_codec(&client->dev,
528 &soc_codec_dev_tas2552,
529 tas2552_dai, ARRAY_SIZE(tas2552_dai));
530 if (ret < 0)
531 dev_err(&client->dev, "Failed to register codec: %d\n", ret);
532
533 return ret;
534}
535
536static int tas2552_i2c_remove(struct i2c_client *client)
537{
538 snd_soc_unregister_codec(&client->dev);
539 return 0;
540}
541
542static const struct i2c_device_id tas2552_id[] = {
543 { "tas2552", 0 },
544 { }
545};
546MODULE_DEVICE_TABLE(i2c, tas2552_id);
547
548#if IS_ENABLED(CONFIG_OF)
549static const struct of_device_id tas2552_of_match[] = {
550 { .compatible = "ti,tas2552", },
551 {},
552};
553MODULE_DEVICE_TABLE(of, tas2552_of_match);
554#endif
555
556static struct i2c_driver tas2552_i2c_driver = {
557 .driver = {
558 .name = "tas2552",
559 .owner = THIS_MODULE,
560 .of_match_table = of_match_ptr(tas2552_of_match),
561 .pm = &tas2552_pm,
562 },
563 .probe = tas2552_probe,
564 .remove = tas2552_i2c_remove,
565 .id_table = tas2552_id,
566};
567
568module_i2c_driver(tas2552_i2c_driver);
569
570MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
571MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
572MODULE_LICENSE("GPL");
573
