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0e45cab6 CG |
1 | /* |
2 | * max9850.c -- codec driver for max9850 | |
3 | * | |
4 | * Copyright (C) 2011 taskit GmbH | |
5 | * | |
6 | * Author: Christian Glindkamp <christian.glindkamp@taskit.de> | |
7 | * | |
8 | * Initial development of this code was funded by | |
9 | * MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/ | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/i2c.h> | |
06841662 | 21 | #include <linux/regmap.h> |
0e45cab6 CG |
22 | #include <linux/slab.h> |
23 | #include <sound/pcm.h> | |
24 | #include <sound/pcm_params.h> | |
25 | #include <sound/soc.h> | |
26 | #include <sound/tlv.h> | |
27 | ||
28 | #include "max9850.h" | |
29 | ||
30 | struct max9850_priv { | |
06841662 | 31 | struct regmap *regmap; |
0e45cab6 CG |
32 | unsigned int sysclk; |
33 | }; | |
34 | ||
35 | /* max9850 register cache */ | |
06841662 MB |
36 | static const struct reg_default max9850_reg[] = { |
37 | { 2, 0x0c }, | |
38 | { 3, 0x00 }, | |
39 | { 4, 0x00 }, | |
40 | { 5, 0x00 }, | |
41 | { 6, 0x00 }, | |
42 | { 7, 0x00 }, | |
43 | { 8, 0x00 }, | |
44 | { 9, 0x00 }, | |
45 | { 10, 0x00 }, | |
0e45cab6 CG |
46 | }; |
47 | ||
48 | /* these registers are not used at the moment but provided for the sake of | |
49 | * completeness */ | |
06841662 | 50 | static bool max9850_volatile_register(struct device *dev, unsigned int reg) |
0e45cab6 CG |
51 | { |
52 | switch (reg) { | |
53 | case MAX9850_STATUSA: | |
54 | case MAX9850_STATUSB: | |
55 | return 1; | |
56 | default: | |
57 | return 0; | |
58 | } | |
59 | } | |
60 | ||
06841662 MB |
61 | static const struct regmap_config max9850_regmap = { |
62 | .reg_bits = 8, | |
63 | .val_bits = 8, | |
64 | ||
65 | .max_register = MAX9850_DIGITAL_AUDIO, | |
66 | .volatile_reg = max9850_volatile_register, | |
67 | .cache_type = REGCACHE_RBTREE, | |
68 | }; | |
69 | ||
0e45cab6 CG |
70 | static const unsigned int max9850_tlv[] = { |
71 | TLV_DB_RANGE_HEAD(4), | |
72 | 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0), | |
73 | 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0), | |
74 | 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0), | |
75 | 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0), | |
76 | }; | |
77 | ||
78 | static const struct snd_kcontrol_new max9850_controls[] = { | |
79 | SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv), | |
80 | SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1), | |
81 | SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0), | |
82 | }; | |
83 | ||
84 | static const struct snd_kcontrol_new max9850_mixer_controls[] = { | |
85 | SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0), | |
86 | }; | |
87 | ||
88 | static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = { | |
89 | SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0), | |
90 | SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0), | |
91 | SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0), | |
92 | SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0), | |
93 | SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0, | |
94 | &max9850_mixer_controls[0], | |
95 | ARRAY_SIZE(max9850_mixer_controls)), | |
96 | SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0), | |
97 | SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0), | |
98 | SND_SOC_DAPM_OUTPUT("OUTL"), | |
99 | SND_SOC_DAPM_OUTPUT("HPL"), | |
100 | SND_SOC_DAPM_OUTPUT("OUTR"), | |
101 | SND_SOC_DAPM_OUTPUT("HPR"), | |
102 | SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), | |
103 | SND_SOC_DAPM_INPUT("INL"), | |
104 | SND_SOC_DAPM_INPUT("INR"), | |
105 | }; | |
106 | ||
5ee65ec6 | 107 | static const struct snd_soc_dapm_route max9850_dapm_routes[] = { |
0e45cab6 CG |
108 | /* output mixer */ |
109 | {"Output Mixer", NULL, "DAC"}, | |
110 | {"Output Mixer", "Line In Switch", "Line Input"}, | |
111 | ||
112 | /* outputs */ | |
113 | {"Headphone Output", NULL, "Output Mixer"}, | |
114 | {"HPL", NULL, "Headphone Output"}, | |
115 | {"HPR", NULL, "Headphone Output"}, | |
116 | {"OUTL", NULL, "Output Mixer"}, | |
117 | {"OUTR", NULL, "Output Mixer"}, | |
118 | ||
119 | /* inputs */ | |
120 | {"Line Input", NULL, "INL"}, | |
121 | {"Line Input", NULL, "INR"}, | |
122 | ||
123 | /* supplies */ | |
124 | {"Output Mixer", NULL, "Charge Pump 1"}, | |
125 | {"Output Mixer", NULL, "Charge Pump 2"}, | |
126 | {"Output Mixer", NULL, "SHDN"}, | |
127 | {"DAC", NULL, "MCLK"}, | |
128 | }; | |
129 | ||
130 | static int max9850_hw_params(struct snd_pcm_substream *substream, | |
131 | struct snd_pcm_hw_params *params, | |
132 | struct snd_soc_dai *dai) | |
133 | { | |
134 | struct snd_soc_codec *codec = dai->codec; | |
135 | struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); | |
136 | u64 lrclk_div; | |
137 | u8 sf, da; | |
138 | ||
27380fb8 | 139 | if (!max9850->sysclk) |
0e45cab6 CG |
140 | return -EINVAL; |
141 | ||
142 | /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */ | |
143 | sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1; | |
144 | lrclk_div = (1 << 22); | |
145 | lrclk_div *= params_rate(params); | |
146 | lrclk_div *= sf; | |
147 | do_div(lrclk_div, max9850->sysclk); | |
148 | ||
149 | snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f); | |
150 | snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff); | |
151 | ||
0058e459 MB |
152 | switch (params_width(params)) { |
153 | case 16: | |
0e45cab6 CG |
154 | da = 0; |
155 | break; | |
0058e459 | 156 | case 20: |
0e45cab6 CG |
157 | da = 0x2; |
158 | break; | |
0058e459 | 159 | case 24: |
0e45cab6 CG |
160 | da = 0x3; |
161 | break; | |
162 | default: | |
163 | return -EINVAL; | |
164 | } | |
165 | snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
171 | int clk_id, unsigned int freq, int dir) | |
172 | { | |
173 | struct snd_soc_codec *codec = codec_dai->codec; | |
174 | struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); | |
175 | ||
176 | /* calculate mclk -> iclk divider */ | |
177 | if (freq <= 13000000) | |
178 | snd_soc_write(codec, MAX9850_CLOCK, 0x0); | |
179 | else if (freq <= 26000000) | |
180 | snd_soc_write(codec, MAX9850_CLOCK, 0x4); | |
181 | else if (freq <= 40000000) | |
182 | snd_soc_write(codec, MAX9850_CLOCK, 0x8); | |
183 | else | |
184 | return -EINVAL; | |
185 | ||
186 | max9850->sysclk = freq; | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) | |
191 | { | |
192 | struct snd_soc_codec *codec = codec_dai->codec; | |
193 | u8 da = 0; | |
194 | ||
195 | /* set master/slave audio interface */ | |
196 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
197 | case SND_SOC_DAIFMT_CBM_CFM: | |
198 | da |= MAX9850_MASTER; | |
199 | break; | |
200 | case SND_SOC_DAIFMT_CBS_CFS: | |
201 | break; | |
202 | default: | |
203 | return -EINVAL; | |
204 | } | |
205 | ||
206 | /* interface format */ | |
207 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
208 | case SND_SOC_DAIFMT_I2S: | |
209 | da |= MAX9850_DLY; | |
210 | break; | |
211 | case SND_SOC_DAIFMT_RIGHT_J: | |
212 | da |= MAX9850_RTJ; | |
213 | break; | |
214 | case SND_SOC_DAIFMT_LEFT_J: | |
215 | break; | |
216 | default: | |
217 | return -EINVAL; | |
218 | } | |
219 | ||
220 | /* clock inversion */ | |
221 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
222 | case SND_SOC_DAIFMT_NB_NF: | |
223 | break; | |
224 | case SND_SOC_DAIFMT_IB_IF: | |
225 | da |= MAX9850_BCINV | MAX9850_INV; | |
226 | break; | |
227 | case SND_SOC_DAIFMT_IB_NF: | |
228 | da |= MAX9850_BCINV; | |
229 | break; | |
230 | case SND_SOC_DAIFMT_NB_IF: | |
231 | da |= MAX9850_INV; | |
232 | break; | |
233 | default: | |
234 | return -EINVAL; | |
235 | } | |
236 | ||
237 | /* set da */ | |
238 | snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | static int max9850_set_bias_level(struct snd_soc_codec *codec, | |
244 | enum snd_soc_bias_level level) | |
245 | { | |
06841662 | 246 | struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); |
0e45cab6 CG |
247 | int ret; |
248 | ||
249 | switch (level) { | |
250 | case SND_SOC_BIAS_ON: | |
251 | break; | |
252 | case SND_SOC_BIAS_PREPARE: | |
253 | break; | |
254 | case SND_SOC_BIAS_STANDBY: | |
255 | if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { | |
06841662 | 256 | ret = regcache_sync(max9850->regmap); |
0e45cab6 CG |
257 | if (ret) { |
258 | dev_err(codec->dev, | |
259 | "Failed to sync cache: %d\n", ret); | |
260 | return ret; | |
261 | } | |
262 | } | |
263 | break; | |
264 | case SND_SOC_BIAS_OFF: | |
265 | break; | |
266 | } | |
267 | codec->dapm.bias_level = level; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | #define MAX9850_RATES SNDRV_PCM_RATE_8000_48000 | |
272 | ||
273 | #define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
274 | SNDRV_PCM_FMTBIT_S24_LE) | |
275 | ||
85e7652d | 276 | static const struct snd_soc_dai_ops max9850_dai_ops = { |
0e45cab6 CG |
277 | .hw_params = max9850_hw_params, |
278 | .set_sysclk = max9850_set_dai_sysclk, | |
279 | .set_fmt = max9850_set_dai_fmt, | |
280 | }; | |
281 | ||
282 | static struct snd_soc_dai_driver max9850_dai = { | |
283 | .name = "max9850-hifi", | |
284 | .playback = { | |
285 | .stream_name = "Playback", | |
286 | .channels_min = 1, | |
287 | .channels_max = 2, | |
288 | .rates = MAX9850_RATES, | |
289 | .formats = MAX9850_FORMATS | |
290 | }, | |
291 | .ops = &max9850_dai_ops, | |
292 | }; | |
293 | ||
294 | #ifdef CONFIG_PM | |
84b315ee | 295 | static int max9850_suspend(struct snd_soc_codec *codec) |
0e45cab6 CG |
296 | { |
297 | max9850_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static int max9850_resume(struct snd_soc_codec *codec) | |
303 | { | |
304 | max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | #else | |
309 | #define max9850_suspend NULL | |
310 | #define max9850_resume NULL | |
311 | #endif | |
312 | ||
313 | static int max9850_probe(struct snd_soc_codec *codec) | |
314 | { | |
0e45cab6 CG |
315 | int ret; |
316 | ||
06841662 | 317 | ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP); |
0e45cab6 CG |
318 | if (ret < 0) { |
319 | dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); | |
320 | return ret; | |
321 | } | |
322 | ||
323 | /* enable zero-detect */ | |
324 | snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1); | |
325 | /* enable slew-rate control */ | |
326 | snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40); | |
327 | /* set slew-rate 125ms */ | |
328 | snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0); | |
329 | ||
0e45cab6 CG |
330 | return 0; |
331 | } | |
332 | ||
333 | static struct snd_soc_codec_driver soc_codec_dev_max9850 = { | |
334 | .probe = max9850_probe, | |
335 | .suspend = max9850_suspend, | |
336 | .resume = max9850_resume, | |
337 | .set_bias_level = max9850_set_bias_level, | |
5ee65ec6 AL |
338 | |
339 | .controls = max9850_controls, | |
340 | .num_controls = ARRAY_SIZE(max9850_controls), | |
341 | .dapm_widgets = max9850_dapm_widgets, | |
342 | .num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets), | |
343 | .dapm_routes = max9850_dapm_routes, | |
344 | .num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes), | |
0e45cab6 CG |
345 | }; |
346 | ||
7a79e94e BP |
347 | static int max9850_i2c_probe(struct i2c_client *i2c, |
348 | const struct i2c_device_id *id) | |
0e45cab6 CG |
349 | { |
350 | struct max9850_priv *max9850; | |
351 | int ret; | |
352 | ||
bf791bdb AL |
353 | max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv), |
354 | GFP_KERNEL); | |
0e45cab6 CG |
355 | if (max9850 == NULL) |
356 | return -ENOMEM; | |
357 | ||
06841662 MB |
358 | max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap); |
359 | if (IS_ERR(max9850->regmap)) | |
360 | return PTR_ERR(max9850->regmap); | |
361 | ||
0e45cab6 CG |
362 | i2c_set_clientdata(i2c, max9850); |
363 | ||
364 | ret = snd_soc_register_codec(&i2c->dev, | |
365 | &soc_codec_dev_max9850, &max9850_dai, 1); | |
0e45cab6 CG |
366 | return ret; |
367 | } | |
368 | ||
7a79e94e | 369 | static int max9850_i2c_remove(struct i2c_client *client) |
0e45cab6 CG |
370 | { |
371 | snd_soc_unregister_codec(&client->dev); | |
0e45cab6 CG |
372 | return 0; |
373 | } | |
374 | ||
375 | static const struct i2c_device_id max9850_i2c_id[] = { | |
376 | { "max9850", 0 }, | |
377 | { } | |
378 | }; | |
379 | MODULE_DEVICE_TABLE(i2c, max9850_i2c_id); | |
380 | ||
381 | static struct i2c_driver max9850_i2c_driver = { | |
382 | .driver = { | |
383 | .name = "max9850", | |
384 | .owner = THIS_MODULE, | |
385 | }, | |
386 | .probe = max9850_i2c_probe, | |
7a79e94e | 387 | .remove = max9850_i2c_remove, |
0e45cab6 CG |
388 | .id_table = max9850_i2c_id, |
389 | }; | |
390 | ||
4abdc8c8 | 391 | module_i2c_driver(max9850_i2c_driver); |
0e45cab6 CG |
392 | |
393 | MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>"); | |
394 | MODULE_DESCRIPTION("ASoC MAX9850 codec driver"); | |
395 | MODULE_LICENSE("GPL"); |