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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> | |
21 | #include <linux/slab.h> | |
22 | #include <sound/pcm.h> | |
23 | #include <sound/pcm_params.h> | |
24 | #include <sound/soc.h> | |
25 | #include <sound/tlv.h> | |
26 | ||
27 | #include "max9850.h" | |
28 | ||
29 | struct max9850_priv { | |
30 | unsigned int sysclk; | |
31 | }; | |
32 | ||
33 | /* max9850 register cache */ | |
34 | static const u8 max9850_reg[MAX9850_CACHEREGNUM] = { | |
35 | 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | |
36 | }; | |
37 | ||
38 | /* these registers are not used at the moment but provided for the sake of | |
39 | * completeness */ | |
40 | static int max9850_volatile_register(struct snd_soc_codec *codec, | |
41 | unsigned int reg) | |
42 | { | |
43 | switch (reg) { | |
44 | case MAX9850_STATUSA: | |
45 | case MAX9850_STATUSB: | |
46 | return 1; | |
47 | default: | |
48 | return 0; | |
49 | } | |
50 | } | |
51 | ||
52 | static const unsigned int max9850_tlv[] = { | |
53 | TLV_DB_RANGE_HEAD(4), | |
54 | 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0), | |
55 | 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0), | |
56 | 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0), | |
57 | 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0), | |
58 | }; | |
59 | ||
60 | static const struct snd_kcontrol_new max9850_controls[] = { | |
61 | SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv), | |
62 | SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1), | |
63 | SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0), | |
64 | }; | |
65 | ||
66 | static const struct snd_kcontrol_new max9850_mixer_controls[] = { | |
67 | SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0), | |
68 | }; | |
69 | ||
70 | static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = { | |
71 | SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0), | |
72 | SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0), | |
73 | SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0), | |
74 | SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0), | |
75 | SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0, | |
76 | &max9850_mixer_controls[0], | |
77 | ARRAY_SIZE(max9850_mixer_controls)), | |
78 | SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0), | |
79 | SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0), | |
80 | SND_SOC_DAPM_OUTPUT("OUTL"), | |
81 | SND_SOC_DAPM_OUTPUT("HPL"), | |
82 | SND_SOC_DAPM_OUTPUT("OUTR"), | |
83 | SND_SOC_DAPM_OUTPUT("HPR"), | |
84 | SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), | |
85 | SND_SOC_DAPM_INPUT("INL"), | |
86 | SND_SOC_DAPM_INPUT("INR"), | |
87 | }; | |
88 | ||
89 | static const struct snd_soc_dapm_route intercon[] = { | |
90 | /* output mixer */ | |
91 | {"Output Mixer", NULL, "DAC"}, | |
92 | {"Output Mixer", "Line In Switch", "Line Input"}, | |
93 | ||
94 | /* outputs */ | |
95 | {"Headphone Output", NULL, "Output Mixer"}, | |
96 | {"HPL", NULL, "Headphone Output"}, | |
97 | {"HPR", NULL, "Headphone Output"}, | |
98 | {"OUTL", NULL, "Output Mixer"}, | |
99 | {"OUTR", NULL, "Output Mixer"}, | |
100 | ||
101 | /* inputs */ | |
102 | {"Line Input", NULL, "INL"}, | |
103 | {"Line Input", NULL, "INR"}, | |
104 | ||
105 | /* supplies */ | |
106 | {"Output Mixer", NULL, "Charge Pump 1"}, | |
107 | {"Output Mixer", NULL, "Charge Pump 2"}, | |
108 | {"Output Mixer", NULL, "SHDN"}, | |
109 | {"DAC", NULL, "MCLK"}, | |
110 | }; | |
111 | ||
112 | static int max9850_hw_params(struct snd_pcm_substream *substream, | |
113 | struct snd_pcm_hw_params *params, | |
114 | struct snd_soc_dai *dai) | |
115 | { | |
116 | struct snd_soc_codec *codec = dai->codec; | |
117 | struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); | |
118 | u64 lrclk_div; | |
119 | u8 sf, da; | |
120 | ||
27380fb8 | 121 | if (!max9850->sysclk) |
0e45cab6 CG |
122 | return -EINVAL; |
123 | ||
124 | /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */ | |
125 | sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1; | |
126 | lrclk_div = (1 << 22); | |
127 | lrclk_div *= params_rate(params); | |
128 | lrclk_div *= sf; | |
129 | do_div(lrclk_div, max9850->sysclk); | |
130 | ||
131 | snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f); | |
132 | snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff); | |
133 | ||
134 | switch (params_format(params)) { | |
135 | case SNDRV_PCM_FORMAT_S16_LE: | |
136 | da = 0; | |
137 | break; | |
138 | case SNDRV_PCM_FORMAT_S20_3LE: | |
139 | da = 0x2; | |
140 | break; | |
141 | case SNDRV_PCM_FORMAT_S24_LE: | |
142 | da = 0x3; | |
143 | break; | |
144 | default: | |
145 | return -EINVAL; | |
146 | } | |
147 | snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da); | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
153 | int clk_id, unsigned int freq, int dir) | |
154 | { | |
155 | struct snd_soc_codec *codec = codec_dai->codec; | |
156 | struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); | |
157 | ||
158 | /* calculate mclk -> iclk divider */ | |
159 | if (freq <= 13000000) | |
160 | snd_soc_write(codec, MAX9850_CLOCK, 0x0); | |
161 | else if (freq <= 26000000) | |
162 | snd_soc_write(codec, MAX9850_CLOCK, 0x4); | |
163 | else if (freq <= 40000000) | |
164 | snd_soc_write(codec, MAX9850_CLOCK, 0x8); | |
165 | else | |
166 | return -EINVAL; | |
167 | ||
168 | max9850->sysclk = freq; | |
169 | return 0; | |
170 | } | |
171 | ||
172 | static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) | |
173 | { | |
174 | struct snd_soc_codec *codec = codec_dai->codec; | |
175 | u8 da = 0; | |
176 | ||
177 | /* set master/slave audio interface */ | |
178 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
179 | case SND_SOC_DAIFMT_CBM_CFM: | |
180 | da |= MAX9850_MASTER; | |
181 | break; | |
182 | case SND_SOC_DAIFMT_CBS_CFS: | |
183 | break; | |
184 | default: | |
185 | return -EINVAL; | |
186 | } | |
187 | ||
188 | /* interface format */ | |
189 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
190 | case SND_SOC_DAIFMT_I2S: | |
191 | da |= MAX9850_DLY; | |
192 | break; | |
193 | case SND_SOC_DAIFMT_RIGHT_J: | |
194 | da |= MAX9850_RTJ; | |
195 | break; | |
196 | case SND_SOC_DAIFMT_LEFT_J: | |
197 | break; | |
198 | default: | |
199 | return -EINVAL; | |
200 | } | |
201 | ||
202 | /* clock inversion */ | |
203 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
204 | case SND_SOC_DAIFMT_NB_NF: | |
205 | break; | |
206 | case SND_SOC_DAIFMT_IB_IF: | |
207 | da |= MAX9850_BCINV | MAX9850_INV; | |
208 | break; | |
209 | case SND_SOC_DAIFMT_IB_NF: | |
210 | da |= MAX9850_BCINV; | |
211 | break; | |
212 | case SND_SOC_DAIFMT_NB_IF: | |
213 | da |= MAX9850_INV; | |
214 | break; | |
215 | default: | |
216 | return -EINVAL; | |
217 | } | |
218 | ||
219 | /* set da */ | |
220 | snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static int max9850_set_bias_level(struct snd_soc_codec *codec, | |
226 | enum snd_soc_bias_level level) | |
227 | { | |
228 | int ret; | |
229 | ||
230 | switch (level) { | |
231 | case SND_SOC_BIAS_ON: | |
232 | break; | |
233 | case SND_SOC_BIAS_PREPARE: | |
234 | break; | |
235 | case SND_SOC_BIAS_STANDBY: | |
236 | if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { | |
237 | ret = snd_soc_cache_sync(codec); | |
238 | if (ret) { | |
239 | dev_err(codec->dev, | |
240 | "Failed to sync cache: %d\n", ret); | |
241 | return ret; | |
242 | } | |
243 | } | |
244 | break; | |
245 | case SND_SOC_BIAS_OFF: | |
246 | break; | |
247 | } | |
248 | codec->dapm.bias_level = level; | |
249 | return 0; | |
250 | } | |
251 | ||
252 | #define MAX9850_RATES SNDRV_PCM_RATE_8000_48000 | |
253 | ||
254 | #define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
255 | SNDRV_PCM_FMTBIT_S24_LE) | |
256 | ||
257 | static struct snd_soc_dai_ops max9850_dai_ops = { | |
258 | .hw_params = max9850_hw_params, | |
259 | .set_sysclk = max9850_set_dai_sysclk, | |
260 | .set_fmt = max9850_set_dai_fmt, | |
261 | }; | |
262 | ||
263 | static struct snd_soc_dai_driver max9850_dai = { | |
264 | .name = "max9850-hifi", | |
265 | .playback = { | |
266 | .stream_name = "Playback", | |
267 | .channels_min = 1, | |
268 | .channels_max = 2, | |
269 | .rates = MAX9850_RATES, | |
270 | .formats = MAX9850_FORMATS | |
271 | }, | |
272 | .ops = &max9850_dai_ops, | |
273 | }; | |
274 | ||
275 | #ifdef CONFIG_PM | |
276 | static int max9850_suspend(struct snd_soc_codec *codec, pm_message_t state) | |
277 | { | |
278 | max9850_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int max9850_resume(struct snd_soc_codec *codec) | |
284 | { | |
285 | max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
286 | ||
287 | return 0; | |
288 | } | |
289 | #else | |
290 | #define max9850_suspend NULL | |
291 | #define max9850_resume NULL | |
292 | #endif | |
293 | ||
294 | static int max9850_probe(struct snd_soc_codec *codec) | |
295 | { | |
296 | struct snd_soc_dapm_context *dapm = &codec->dapm; | |
297 | int ret; | |
298 | ||
299 | ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C); | |
300 | if (ret < 0) { | |
301 | dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | /* enable zero-detect */ | |
306 | snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1); | |
307 | /* enable slew-rate control */ | |
308 | snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40); | |
309 | /* set slew-rate 125ms */ | |
310 | snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0); | |
311 | ||
312 | snd_soc_dapm_new_controls(dapm, max9850_dapm_widgets, | |
313 | ARRAY_SIZE(max9850_dapm_widgets)); | |
314 | snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon)); | |
315 | ||
316 | snd_soc_add_controls(codec, max9850_controls, | |
317 | ARRAY_SIZE(max9850_controls)); | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static struct snd_soc_codec_driver soc_codec_dev_max9850 = { | |
323 | .probe = max9850_probe, | |
324 | .suspend = max9850_suspend, | |
325 | .resume = max9850_resume, | |
326 | .set_bias_level = max9850_set_bias_level, | |
327 | .reg_cache_size = ARRAY_SIZE(max9850_reg), | |
328 | .reg_word_size = sizeof(u8), | |
329 | .reg_cache_default = max9850_reg, | |
330 | .volatile_register = max9850_volatile_register, | |
331 | }; | |
332 | ||
333 | static int __devinit max9850_i2c_probe(struct i2c_client *i2c, | |
334 | const struct i2c_device_id *id) | |
335 | { | |
336 | struct max9850_priv *max9850; | |
337 | int ret; | |
338 | ||
339 | max9850 = kzalloc(sizeof(struct max9850_priv), GFP_KERNEL); | |
340 | if (max9850 == NULL) | |
341 | return -ENOMEM; | |
342 | ||
343 | i2c_set_clientdata(i2c, max9850); | |
344 | ||
345 | ret = snd_soc_register_codec(&i2c->dev, | |
346 | &soc_codec_dev_max9850, &max9850_dai, 1); | |
347 | if (ret < 0) | |
348 | kfree(max9850); | |
349 | return ret; | |
350 | } | |
351 | ||
352 | static __devexit int max9850_i2c_remove(struct i2c_client *client) | |
353 | { | |
354 | snd_soc_unregister_codec(&client->dev); | |
355 | kfree(i2c_get_clientdata(client)); | |
356 | return 0; | |
357 | } | |
358 | ||
359 | static const struct i2c_device_id max9850_i2c_id[] = { | |
360 | { "max9850", 0 }, | |
361 | { } | |
362 | }; | |
363 | MODULE_DEVICE_TABLE(i2c, max9850_i2c_id); | |
364 | ||
365 | static struct i2c_driver max9850_i2c_driver = { | |
366 | .driver = { | |
367 | .name = "max9850", | |
368 | .owner = THIS_MODULE, | |
369 | }, | |
370 | .probe = max9850_i2c_probe, | |
371 | .remove = __devexit_p(max9850_i2c_remove), | |
372 | .id_table = max9850_i2c_id, | |
373 | }; | |
374 | ||
375 | static int __init max9850_init(void) | |
376 | { | |
377 | return i2c_add_driver(&max9850_i2c_driver); | |
378 | } | |
379 | module_init(max9850_init); | |
380 | ||
381 | static void __exit max9850_exit(void) | |
382 | { | |
383 | i2c_del_driver(&max9850_i2c_driver); | |
384 | } | |
385 | module_exit(max9850_exit); | |
386 | ||
387 | MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>"); | |
388 | MODULE_DESCRIPTION("ASoC MAX9850 codec driver"); | |
389 | MODULE_LICENSE("GPL"); |