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a3a83d9a KM |
1 | /* |
2 | * ak4642.c -- AK4642/AK4643 ALSA Soc Audio driver | |
3 | * | |
4 | * Copyright (C) 2009 Renesas Solutions Corp. | |
5 | * Kuninori Morimoto <morimoto.kuninori@renesas.com> | |
6 | * | |
7 | * Based on wm8731.c by Richard Purdie | |
8 | * Based on ak4535.c by Richard Purdie | |
9 | * Based on wm8753.c by Liam Girdwood | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | ||
16 | /* ** CAUTION ** | |
17 | * | |
18 | * This is very simple driver. | |
19 | * It can use headphone output / stereo input only | |
20 | * | |
21 | * AK4642 is not tested. | |
22 | * AK4643 is tested. | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/moduleparam.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/pm.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <linux/platform_device.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
a3a83d9a KM |
33 | #include <sound/core.h> |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/soc.h> | |
37 | #include <sound/soc-dapm.h> | |
38 | #include <sound/initval.h> | |
39 | ||
40 | #include "ak4642.h" | |
41 | ||
42 | #define AK4642_VERSION "0.0.1" | |
43 | ||
44 | #define PW_MGMT1 0x00 | |
45 | #define PW_MGMT2 0x01 | |
46 | #define SG_SL1 0x02 | |
47 | #define SG_SL2 0x03 | |
48 | #define MD_CTL1 0x04 | |
49 | #define MD_CTL2 0x05 | |
50 | #define TIMER 0x06 | |
51 | #define ALC_CTL1 0x07 | |
52 | #define ALC_CTL2 0x08 | |
53 | #define L_IVC 0x09 | |
54 | #define L_DVC 0x0a | |
55 | #define ALC_CTL3 0x0b | |
56 | #define R_IVC 0x0c | |
57 | #define R_DVC 0x0d | |
58 | #define MD_CTL3 0x0e | |
59 | #define MD_CTL4 0x0f | |
60 | #define PW_MGMT3 0x10 | |
61 | #define DF_S 0x11 | |
62 | #define FIL3_0 0x12 | |
63 | #define FIL3_1 0x13 | |
64 | #define FIL3_2 0x14 | |
65 | #define FIL3_3 0x15 | |
66 | #define EQ_0 0x16 | |
67 | #define EQ_1 0x17 | |
68 | #define EQ_2 0x18 | |
69 | #define EQ_3 0x19 | |
70 | #define EQ_4 0x1a | |
71 | #define EQ_5 0x1b | |
72 | #define FIL1_0 0x1c | |
73 | #define FIL1_1 0x1d | |
74 | #define FIL1_2 0x1e | |
75 | #define FIL1_3 0x1f | |
76 | #define PW_MGMT4 0x20 | |
77 | #define MD_CTL5 0x21 | |
78 | #define LO_MS 0x22 | |
79 | #define HP_MS 0x23 | |
80 | #define SPK_MS 0x24 | |
81 | ||
82 | #define AK4642_CACHEREGNUM 0x25 | |
83 | ||
84 | struct snd_soc_codec_device soc_codec_dev_ak4642; | |
85 | ||
86 | /* codec private data */ | |
87 | struct ak4642_priv { | |
88 | struct snd_soc_codec codec; | |
89 | unsigned int sysclk; | |
90 | }; | |
91 | ||
92 | static struct snd_soc_codec *ak4642_codec; | |
93 | ||
94 | /* | |
95 | * ak4642 register cache | |
96 | */ | |
97 | static const u16 ak4642_reg[AK4642_CACHEREGNUM] = { | |
98 | 0x0000, 0x0000, 0x0001, 0x0000, | |
99 | 0x0002, 0x0000, 0x0000, 0x0000, | |
100 | 0x00e1, 0x00e1, 0x0018, 0x0000, | |
101 | 0x00e1, 0x0018, 0x0011, 0x0008, | |
102 | 0x0000, 0x0000, 0x0000, 0x0000, | |
103 | 0x0000, 0x0000, 0x0000, 0x0000, | |
104 | 0x0000, 0x0000, 0x0000, 0x0000, | |
105 | 0x0000, 0x0000, 0x0000, 0x0000, | |
106 | 0x0000, 0x0000, 0x0000, 0x0000, | |
107 | 0x0000, | |
108 | }; | |
109 | ||
110 | /* | |
111 | * read ak4642 register cache | |
112 | */ | |
113 | static inline unsigned int ak4642_read_reg_cache(struct snd_soc_codec *codec, | |
114 | unsigned int reg) | |
115 | { | |
116 | u16 *cache = codec->reg_cache; | |
117 | if (reg >= AK4642_CACHEREGNUM) | |
118 | return -1; | |
119 | return cache[reg]; | |
120 | } | |
121 | ||
122 | /* | |
123 | * write ak4642 register cache | |
124 | */ | |
125 | static inline void ak4642_write_reg_cache(struct snd_soc_codec *codec, | |
126 | u16 reg, unsigned int value) | |
127 | { | |
128 | u16 *cache = codec->reg_cache; | |
129 | if (reg >= AK4642_CACHEREGNUM) | |
130 | return; | |
131 | ||
132 | cache[reg] = value; | |
133 | } | |
134 | ||
135 | /* | |
136 | * write to the AK4642 register space | |
137 | */ | |
138 | static int ak4642_write(struct snd_soc_codec *codec, unsigned int reg, | |
139 | unsigned int value) | |
140 | { | |
141 | u8 data[2]; | |
142 | ||
143 | /* data is | |
144 | * D15..D8 AK4642 register offset | |
145 | * D7...D0 register data | |
146 | */ | |
147 | data[0] = reg & 0xff; | |
148 | data[1] = value & 0xff; | |
149 | ||
150 | if (codec->hw_write(codec->control_data, data, 2) == 2) { | |
151 | ak4642_write_reg_cache(codec, reg, value); | |
152 | return 0; | |
153 | } else | |
154 | return -EIO; | |
155 | } | |
156 | ||
157 | static int ak4642_sync(struct snd_soc_codec *codec) | |
158 | { | |
159 | u16 *cache = codec->reg_cache; | |
160 | int i, r = 0; | |
161 | ||
162 | for (i = 0; i < AK4642_CACHEREGNUM; i++) | |
163 | r |= ak4642_write(codec, i, cache[i]); | |
164 | ||
165 | return r; | |
166 | }; | |
167 | ||
168 | static int ak4642_dai_startup(struct snd_pcm_substream *substream, | |
169 | struct snd_soc_dai *dai) | |
170 | { | |
171 | int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
172 | struct snd_soc_codec *codec = dai->codec; | |
173 | ||
174 | if (is_play) { | |
175 | /* | |
176 | * start headphone output | |
177 | * | |
178 | * PLL, Master Mode | |
179 | * Audio I/F Format :MSB justified (ADC & DAC) | |
180 | * Sampling Frequency: 44.1kHz | |
181 | * Digital Volume: −8dB | |
182 | * Bass Boost Level : Middle | |
183 | * | |
184 | * This operation came from example code of | |
185 | * "ASAHI KASEI AK4642" (japanese) manual p97. | |
186 | * | |
187 | * Example code use 0x39, 0x79 value for 0x01 address, | |
188 | * But we need MCKO (0x02) bit now | |
189 | */ | |
190 | ak4642_write(codec, 0x05, 0x27); | |
191 | ak4642_write(codec, 0x0f, 0x09); | |
192 | ak4642_write(codec, 0x0e, 0x19); | |
193 | ak4642_write(codec, 0x09, 0x91); | |
194 | ak4642_write(codec, 0x0c, 0x91); | |
195 | ak4642_write(codec, 0x0a, 0x28); | |
196 | ak4642_write(codec, 0x0d, 0x28); | |
197 | ak4642_write(codec, 0x00, 0x64); | |
198 | ak4642_write(codec, 0x01, 0x3b); /* + MCKO bit */ | |
199 | ak4642_write(codec, 0x01, 0x7b); /* + MCKO bit */ | |
200 | } else { | |
201 | /* | |
202 | * start stereo input | |
203 | * | |
204 | * PLL Master Mode | |
205 | * Audio I/F Format:MSB justified (ADC & DAC) | |
206 | * Sampling Frequency:44.1kHz | |
207 | * Pre MIC AMP:+20dB | |
208 | * MIC Power On | |
209 | * ALC setting:Refer to Table 35 | |
210 | * ALC bit=“1” | |
211 | * | |
212 | * This operation came from example code of | |
213 | * "ASAHI KASEI AK4642" (japanese) manual p94. | |
214 | */ | |
215 | ak4642_write(codec, 0x05, 0x27); | |
216 | ak4642_write(codec, 0x02, 0x05); | |
217 | ak4642_write(codec, 0x06, 0x3c); | |
218 | ak4642_write(codec, 0x08, 0xe1); | |
219 | ak4642_write(codec, 0x0b, 0x00); | |
220 | ak4642_write(codec, 0x07, 0x21); | |
221 | ak4642_write(codec, 0x00, 0x41); | |
222 | ak4642_write(codec, 0x10, 0x01); | |
223 | } | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static void ak4642_dai_shutdown(struct snd_pcm_substream *substream, | |
229 | struct snd_soc_dai *dai) | |
230 | { | |
231 | int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
232 | struct snd_soc_codec *codec = dai->codec; | |
233 | ||
234 | if (is_play) { | |
235 | /* stop headphone output */ | |
236 | ak4642_write(codec, 0x01, 0x3b); | |
237 | ak4642_write(codec, 0x01, 0x0b); | |
238 | ak4642_write(codec, 0x00, 0x40); | |
239 | ak4642_write(codec, 0x0e, 0x11); | |
240 | ak4642_write(codec, 0x0f, 0x08); | |
241 | } else { | |
242 | /* stop stereo input */ | |
243 | ak4642_write(codec, 0x00, 0x40); | |
244 | ak4642_write(codec, 0x10, 0x00); | |
245 | ak4642_write(codec, 0x07, 0x01); | |
246 | } | |
247 | } | |
248 | ||
249 | static int ak4642_dai_set_sysclk(struct snd_soc_dai *codec_dai, | |
250 | int clk_id, unsigned int freq, int dir) | |
251 | { | |
252 | struct snd_soc_codec *codec = codec_dai->codec; | |
253 | struct ak4642_priv *ak4642 = codec->private_data; | |
254 | ||
255 | ak4642->sysclk = freq; | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static struct snd_soc_dai_ops ak4642_dai_ops = { | |
260 | .startup = ak4642_dai_startup, | |
261 | .shutdown = ak4642_dai_shutdown, | |
262 | .set_sysclk = ak4642_dai_set_sysclk, | |
263 | }; | |
264 | ||
265 | struct snd_soc_dai ak4642_dai = { | |
266 | .name = "AK4642", | |
267 | .playback = { | |
268 | .stream_name = "Playback", | |
269 | .channels_min = 1, | |
270 | .channels_max = 2, | |
271 | .rates = SNDRV_PCM_RATE_8000_48000, | |
272 | .formats = SNDRV_PCM_FMTBIT_S16_LE }, | |
273 | .capture = { | |
274 | .stream_name = "Capture", | |
275 | .channels_min = 1, | |
276 | .channels_max = 2, | |
277 | .rates = SNDRV_PCM_RATE_8000_48000, | |
278 | .formats = SNDRV_PCM_FMTBIT_S16_LE }, | |
279 | .ops = &ak4642_dai_ops, | |
280 | }; | |
281 | EXPORT_SYMBOL_GPL(ak4642_dai); | |
282 | ||
283 | static int ak4642_resume(struct platform_device *pdev) | |
284 | { | |
285 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
286 | struct snd_soc_codec *codec = socdev->card->codec; | |
287 | ||
288 | ak4642_sync(codec); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | /* | |
293 | * initialise the AK4642 driver | |
294 | * register the mixer and dsp interfaces with the kernel | |
295 | */ | |
296 | static int ak4642_init(struct ak4642_priv *ak4642) | |
297 | { | |
298 | struct snd_soc_codec *codec = &ak4642->codec; | |
299 | int ret = 0; | |
300 | ||
301 | if (ak4642_codec) { | |
302 | dev_err(codec->dev, "Another ak4642 is registered\n"); | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | mutex_init(&codec->mutex); | |
307 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
308 | INIT_LIST_HEAD(&codec->dapm_paths); | |
309 | ||
310 | codec->private_data = ak4642; | |
311 | codec->name = "AK4642"; | |
312 | codec->owner = THIS_MODULE; | |
313 | codec->read = ak4642_read_reg_cache; | |
314 | codec->write = ak4642_write; | |
315 | codec->dai = &ak4642_dai; | |
316 | codec->num_dai = 1; | |
317 | codec->hw_write = (hw_write_t)i2c_master_send; | |
318 | codec->reg_cache_size = ARRAY_SIZE(ak4642_reg); | |
319 | codec->reg_cache = kmemdup(ak4642_reg, | |
320 | sizeof(ak4642_reg), GFP_KERNEL); | |
321 | ||
322 | if (!codec->reg_cache) | |
323 | return -ENOMEM; | |
324 | ||
325 | ak4642_dai.dev = codec->dev; | |
326 | ak4642_codec = codec; | |
327 | ||
328 | ret = snd_soc_register_codec(codec); | |
329 | if (ret) { | |
330 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
331 | goto reg_cache_err; | |
332 | } | |
333 | ||
334 | ret = snd_soc_register_dai(&ak4642_dai); | |
335 | if (ret) { | |
336 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
337 | snd_soc_unregister_codec(codec); | |
338 | goto reg_cache_err; | |
339 | } | |
340 | ||
341 | /* | |
342 | * clock setting | |
343 | * | |
344 | * Audio I/F Format: MSB justified (ADC & DAC) | |
345 | * BICK frequency at Master Mode: 64fs | |
346 | * Input Master Clock Select at PLL Mode: 11.2896MHz | |
347 | * MCKO: Enable | |
348 | * Sampling Frequency: 44.1kHz | |
349 | * | |
350 | * This operation came from example code of | |
351 | * "ASAHI KASEI AK4642" (japanese) manual p89. | |
352 | * | |
353 | * please fix-me | |
354 | */ | |
355 | ak4642_write(codec, 0x01, 0x08); | |
356 | ak4642_write(codec, 0x04, 0x4a); | |
357 | ak4642_write(codec, 0x05, 0x27); | |
358 | ak4642_write(codec, 0x00, 0x40); | |
359 | ak4642_write(codec, 0x01, 0x0b); | |
360 | ||
361 | return ret; | |
362 | ||
363 | reg_cache_err: | |
364 | kfree(codec->reg_cache); | |
365 | codec->reg_cache = NULL; | |
366 | ||
367 | return ret; | |
368 | } | |
369 | ||
370 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
371 | static int ak4642_i2c_probe(struct i2c_client *i2c, | |
372 | const struct i2c_device_id *id) | |
373 | { | |
374 | struct ak4642_priv *ak4642; | |
375 | struct snd_soc_codec *codec; | |
376 | int ret; | |
377 | ||
378 | ak4642 = kzalloc(sizeof(struct ak4642_priv), GFP_KERNEL); | |
379 | if (!ak4642) | |
380 | return -ENOMEM; | |
381 | ||
382 | codec = &ak4642->codec; | |
383 | codec->dev = &i2c->dev; | |
384 | ||
385 | i2c_set_clientdata(i2c, ak4642); | |
386 | codec->control_data = i2c; | |
387 | ||
388 | ret = ak4642_init(ak4642); | |
389 | if (ret < 0) | |
390 | printk(KERN_ERR "failed to initialise AK4642\n"); | |
391 | ||
392 | return ret; | |
393 | } | |
394 | ||
395 | static int ak4642_i2c_remove(struct i2c_client *client) | |
396 | { | |
397 | struct ak4642_priv *ak4642 = i2c_get_clientdata(client); | |
398 | ||
399 | snd_soc_unregister_dai(&ak4642_dai); | |
400 | snd_soc_unregister_codec(&ak4642->codec); | |
401 | kfree(ak4642->codec.reg_cache); | |
402 | kfree(ak4642); | |
403 | ak4642_codec = NULL; | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | static const struct i2c_device_id ak4642_i2c_id[] = { | |
409 | { "ak4642", 0 }, | |
410 | { "ak4643", 0 }, | |
411 | { } | |
412 | }; | |
413 | MODULE_DEVICE_TABLE(i2c, ak4642_i2c_id); | |
414 | ||
415 | static struct i2c_driver ak4642_i2c_driver = { | |
416 | .driver = { | |
417 | .name = "AK4642 I2C Codec", | |
418 | .owner = THIS_MODULE, | |
419 | }, | |
420 | .probe = ak4642_i2c_probe, | |
421 | .remove = ak4642_i2c_remove, | |
422 | .id_table = ak4642_i2c_id, | |
423 | }; | |
424 | ||
425 | #endif | |
426 | ||
427 | static int ak4642_probe(struct platform_device *pdev) | |
428 | { | |
429 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
430 | int ret; | |
431 | ||
432 | if (!ak4642_codec) { | |
433 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
434 | return -ENODEV; | |
435 | } | |
436 | ||
437 | socdev->card->codec = ak4642_codec; | |
438 | ||
439 | /* register pcms */ | |
440 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
441 | if (ret < 0) { | |
442 | printk(KERN_ERR "ak4642: failed to create pcms\n"); | |
443 | goto pcm_err; | |
444 | } | |
445 | ||
a3a83d9a KM |
446 | dev_info(&pdev->dev, "AK4642 Audio Codec %s", AK4642_VERSION); |
447 | return ret; | |
448 | ||
a3a83d9a KM |
449 | pcm_err: |
450 | return ret; | |
451 | ||
452 | } | |
453 | ||
454 | /* power down chip */ | |
455 | static int ak4642_remove(struct platform_device *pdev) | |
456 | { | |
457 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
458 | ||
459 | snd_soc_free_pcms(socdev); | |
460 | snd_soc_dapm_free(socdev); | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
465 | struct snd_soc_codec_device soc_codec_dev_ak4642 = { | |
466 | .probe = ak4642_probe, | |
467 | .remove = ak4642_remove, | |
468 | .resume = ak4642_resume, | |
469 | }; | |
470 | EXPORT_SYMBOL_GPL(soc_codec_dev_ak4642); | |
471 | ||
472 | static int __init ak4642_modinit(void) | |
473 | { | |
1cf86f6f | 474 | int ret = 0; |
a3a83d9a KM |
475 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
476 | ret = i2c_add_driver(&ak4642_i2c_driver); | |
477 | #endif | |
478 | return ret; | |
479 | ||
480 | } | |
481 | module_init(ak4642_modinit); | |
482 | ||
483 | static void __exit ak4642_exit(void) | |
484 | { | |
485 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
486 | i2c_del_driver(&ak4642_i2c_driver); | |
487 | #endif | |
488 | ||
489 | } | |
490 | module_exit(ak4642_exit); | |
491 | ||
492 | MODULE_DESCRIPTION("Soc AK4642 driver"); | |
493 | MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>"); | |
494 | MODULE_LICENSE("GPL"); |