tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * ASoC codec driver for spear platform
3 *
4 * sound/soc/codecs/sta529.c -- spear ALSA Soc codec driver
5 *
6 * Copyright (C) 2012 ST Microelectronics
7 * Rajeev Kumar <rajeev-dlh.kumar@st.com>
8 *
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
12 */
13
14#include <linux/clk.h>
15#include <linux/init.h>
16#include <linux/i2c.h>
17#include <linux/io.h>
18#include <linux/module.h>
19#include <linux/moduleparam.h>
20#include <linux/pm.h>
21#include <linux/regmap.h>
22#include <linux/slab.h>
23
24#include <sound/core.h>
25#include <sound/initval.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28#include <sound/soc.h>
29#include <sound/soc-dapm.h>
30#include <sound/tlv.h>
31
32/* STA529 Register offsets */
33#define STA529_FFXCFG0 0x00
34#define STA529_FFXCFG1 0x01
35#define STA529_MVOL 0x02
36#define STA529_LVOL 0x03
37#define STA529_RVOL 0x04
38#define STA529_TTF0 0x05
39#define STA529_TTF1 0x06
40#define STA529_TTP0 0x07
41#define STA529_TTP1 0x08
42#define STA529_S2PCFG0 0x0A
43#define STA529_S2PCFG1 0x0B
44#define STA529_P2SCFG0 0x0C
45#define STA529_P2SCFG1 0x0D
46#define STA529_PLLCFG0 0x14
47#define STA529_PLLCFG1 0x15
48#define STA529_PLLCFG2 0x16
49#define STA529_PLLCFG3 0x17
50#define STA529_PLLPFE 0x18
51#define STA529_PLLST 0x19
52#define STA529_ADCCFG 0x1E /*mic_select*/
53#define STA529_CKOCFG 0x1F
54#define STA529_MISC 0x20
55#define STA529_PADST0 0x21
56#define STA529_PADST1 0x22
57#define STA529_FFXST 0x23
58#define STA529_PWMIN1 0x2D
59#define STA529_PWMIN2 0x2E
60#define STA529_POWST 0x32
61
62#define STA529_MAX_REGISTER 0x32
63
64#define STA529_RATES (SNDRV_PCM_RATE_8000 | \
65 SNDRV_PCM_RATE_11025 | \
66 SNDRV_PCM_RATE_16000 | \
67 SNDRV_PCM_RATE_22050 | \
68 SNDRV_PCM_RATE_32000 | \
69 SNDRV_PCM_RATE_44100 | \
70 SNDRV_PCM_RATE_48000)
71
72#define STA529_FORMAT (SNDRV_PCM_FMTBIT_S16_LE | \
73 SNDRV_PCM_FMTBIT_S24_LE | \
74 SNDRV_PCM_FMTBIT_S32_LE)
75#define S2PC_VALUE 0x98
76#define CLOCK_OUT 0x60
77#define DATA_FORMAT_MSK 0x0E
78#define LEFT_J_DATA_FORMAT 0x00
79#define I2S_DATA_FORMAT 0x02
80#define RIGHT_J_DATA_FORMAT 0x04
81#define CODEC_MUTE_VAL 0x80
82
83#define POWER_CNTLMSAK 0x40
84#define POWER_STDBY 0x40
85#define FFX_MASK 0x80
86#define FFX_OFF 0x80
87#define POWER_UP 0x00
88#define FFX_CLK_ENB 0x01
89#define FFX_CLK_DIS 0x00
90#define FFX_CLK_MSK 0x01
91#define PLAY_FREQ_RANGE_MSK 0x70
92#define CAP_FREQ_RANGE_MSK 0x0C
93#define PDATA_LEN_MSK 0xC0
94#define BCLK_TO_FS_MSK 0x30
95#define AUDIO_MUTE_MSK 0x80
96
97static const struct reg_default sta529_reg_defaults[] = {
98 { 0, 0x35 }, /* R0 - FFX Configuration reg 0 */
99 { 1, 0xc8 }, /* R1 - FFX Configuration reg 1 */
100 { 2, 0x50 }, /* R2 - Master Volume */
101 { 3, 0x00 }, /* R3 - Left Volume */
102 { 4, 0x00 }, /* R4 - Right Volume */
103 { 10, 0xb2 }, /* R10 - S2P Config Reg 0 */
104 { 11, 0x41 }, /* R11 - S2P Config Reg 1 */
105 { 12, 0x92 }, /* R12 - P2S Config Reg 0 */
106 { 13, 0x41 }, /* R13 - P2S Config Reg 1 */
107 { 30, 0xd2 }, /* R30 - ADC Config Reg */
108 { 31, 0x40 }, /* R31 - clock Out Reg */
109 { 32, 0x21 }, /* R32 - Misc Register */
110};
111
112struct sta529 {
113 struct regmap *regmap;
114};
115
116static bool sta529_readable(struct device *dev, unsigned int reg)
117{
118 switch (reg) {
119
120 case STA529_FFXCFG0:
121 case STA529_FFXCFG1:
122 case STA529_MVOL:
123 case STA529_LVOL:
124 case STA529_RVOL:
125 case STA529_S2PCFG0:
126 case STA529_S2PCFG1:
127 case STA529_P2SCFG0:
128 case STA529_P2SCFG1:
129 case STA529_ADCCFG:
130 case STA529_CKOCFG:
131 case STA529_MISC:
132 return true;
133 default:
134 return false;
135 }
136}
137
138
139static const char *pwm_mode_text[] = { "Binary", "Headphone", "Ternary",
140 "Phase-shift"};
141
142static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -9150, 50, 0);
143static const DECLARE_TLV_DB_SCALE(master_vol_tlv, -12750, 50, 0);
144static const SOC_ENUM_SINGLE_DECL(pwm_src, STA529_FFXCFG1, 4, pwm_mode_text);
145
146static const struct snd_kcontrol_new sta529_snd_controls[] = {
147 SOC_DOUBLE_R_TLV("Digital Playback Volume", STA529_LVOL, STA529_RVOL, 0,
148 127, 0, out_gain_tlv),
149 SOC_SINGLE_TLV("Master Playback Volume", STA529_MVOL, 0, 127, 1,
150 master_vol_tlv),
151 SOC_ENUM("PWM Select", pwm_src),
152};
153
154static int sta529_set_bias_level(struct snd_soc_codec *codec, enum
155 snd_soc_bias_level level)
156{
157 struct sta529 *sta529 = snd_soc_codec_get_drvdata(codec);
158
159 switch (level) {
160 case SND_SOC_BIAS_ON:
161 case SND_SOC_BIAS_PREPARE:
162 snd_soc_update_bits(codec, STA529_FFXCFG0, POWER_CNTLMSAK,
163 POWER_UP);
164 snd_soc_update_bits(codec, STA529_MISC, FFX_CLK_MSK,
165 FFX_CLK_ENB);
166 break;
167 case SND_SOC_BIAS_STANDBY:
168 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
169 regcache_sync(sta529->regmap);
170 snd_soc_update_bits(codec, STA529_FFXCFG0,
171 POWER_CNTLMSAK, POWER_STDBY);
172 /* Making FFX output to zero */
173 snd_soc_update_bits(codec, STA529_FFXCFG0, FFX_MASK,
174 FFX_OFF);
175 snd_soc_update_bits(codec, STA529_MISC, FFX_CLK_MSK,
176 FFX_CLK_DIS);
177 break;
178 case SND_SOC_BIAS_OFF:
179 break;
180 }
181
182 /*
183 * store the label for powers down audio subsystem for suspend.This is
184 * used by soc core layer
185 */
186 codec->dapm.bias_level = level;
187
188 return 0;
189
190}
191
192static int sta529_hw_params(struct snd_pcm_substream *substream,
193 struct snd_pcm_hw_params *params,
194 struct snd_soc_dai *dai)
195{
196 struct snd_soc_pcm_runtime *rtd = substream->private_data;
197 struct snd_soc_codec *codec = rtd->codec;
198 int pdata, play_freq_val, record_freq_val;
199 int bclk_to_fs_ratio;
200
201 switch (params_format(params)) {
202 case SNDRV_PCM_FORMAT_S16_LE:
203 pdata = 1;
204 bclk_to_fs_ratio = 0;
205 break;
206 case SNDRV_PCM_FORMAT_S24_LE:
207 pdata = 2;
208 bclk_to_fs_ratio = 1;
209 break;
210 case SNDRV_PCM_FORMAT_S32_LE:
211 pdata = 3;
212 bclk_to_fs_ratio = 2;
213 break;
214 default:
215 dev_err(codec->dev, "Unsupported format\n");
216 return -EINVAL;
217 }
218
219 switch (params_rate(params)) {
220 case 8000:
221 case 11025:
222 play_freq_val = 0;
223 record_freq_val = 2;
224 break;
225 case 16000:
226 case 22050:
227 play_freq_val = 1;
228 record_freq_val = 0;
229 break;
230
231 case 32000:
232 case 44100:
233 case 48000:
234 play_freq_val = 2;
235 record_freq_val = 0;
236 break;
237 default:
238 dev_err(codec->dev, "Unsupported rate\n");
239 return -EINVAL;
240 }
241
242 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
243 snd_soc_update_bits(codec, STA529_S2PCFG1, PDATA_LEN_MSK,
244 pdata << 6);
245 snd_soc_update_bits(codec, STA529_S2PCFG1, BCLK_TO_FS_MSK,
246 bclk_to_fs_ratio << 4);
247 snd_soc_update_bits(codec, STA529_MISC, PLAY_FREQ_RANGE_MSK,
248 play_freq_val << 4);
249 } else {
250 snd_soc_update_bits(codec, STA529_P2SCFG1, PDATA_LEN_MSK,
251 pdata << 6);
252 snd_soc_update_bits(codec, STA529_P2SCFG1, BCLK_TO_FS_MSK,
253 bclk_to_fs_ratio << 4);
254 snd_soc_update_bits(codec, STA529_MISC, CAP_FREQ_RANGE_MSK,
255 record_freq_val << 2);
256 }
257
258 return 0;
259}
260
261static int sta529_mute(struct snd_soc_dai *dai, int mute)
262{
263 u8 val = 0;
264
265 if (mute)
266 val |= CODEC_MUTE_VAL;
267
268 snd_soc_update_bits(dai->codec, STA529_FFXCFG0, AUDIO_MUTE_MSK, val);
269
270 return 0;
271}
272
273static int sta529_set_dai_fmt(struct snd_soc_dai *codec_dai, u32 fmt)
274{
275 struct snd_soc_codec *codec = codec_dai->codec;
276 u8 mode = 0;
277
278 /* interface format */
279 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
280 case SND_SOC_DAIFMT_LEFT_J:
281 mode = LEFT_J_DATA_FORMAT;
282 break;
283 case SND_SOC_DAIFMT_I2S:
284 mode = I2S_DATA_FORMAT;
285 break;
286 case SND_SOC_DAIFMT_RIGHT_J:
287 mode = RIGHT_J_DATA_FORMAT;
288 break;
289 default:
290 return -EINVAL;
291 }
292
293 snd_soc_update_bits(codec, STA529_S2PCFG0, DATA_FORMAT_MSK, mode);
294
295 return 0;
296}
297
298static const struct snd_soc_dai_ops sta529_dai_ops = {
299 .hw_params = sta529_hw_params,
300 .set_fmt = sta529_set_dai_fmt,
301 .digital_mute = sta529_mute,
302};
303
304static struct snd_soc_dai_driver sta529_dai = {
305 .name = "sta529-audio",
306 .playback = {
307 .stream_name = "Playback",
308 .channels_min = 2,
309 .channels_max = 2,
310 .rates = STA529_RATES,
311 .formats = STA529_FORMAT,
312 },
313 .capture = {
314 .stream_name = "Capture",
315 .channels_min = 2,
316 .channels_max = 2,
317 .rates = STA529_RATES,
318 .formats = STA529_FORMAT,
319 },
320 .ops = &sta529_dai_ops,
321};
322
323static int sta529_probe(struct snd_soc_codec *codec)
324{
325 struct sta529 *sta529 = snd_soc_codec_get_drvdata(codec);
326 int ret;
327
328 codec->control_data = sta529->regmap;
329 ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
330
331 if (ret < 0) {
332 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
333 return ret;
334 }
335 sta529_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
336
337 return 0;
338}
339
340/* power down chip */
341static int sta529_remove(struct snd_soc_codec *codec)
342{
343 sta529_set_bias_level(codec, SND_SOC_BIAS_OFF);
344
345 return 0;
346}
347
348static int sta529_suspend(struct snd_soc_codec *codec)
349{
350 sta529_set_bias_level(codec, SND_SOC_BIAS_OFF);
351
352 return 0;
353}
354
355static int sta529_resume(struct snd_soc_codec *codec)
356{
357 sta529_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
358
359 return 0;
360}
361
362static const struct snd_soc_codec_driver sta529_codec_driver = {
363 .probe = sta529_probe,
364 .remove = sta529_remove,
365 .set_bias_level = sta529_set_bias_level,
366 .suspend = sta529_suspend,
367 .resume = sta529_resume,
368 .controls = sta529_snd_controls,
369 .num_controls = ARRAY_SIZE(sta529_snd_controls),
370};
371
372static const struct regmap_config sta529_regmap = {
373 .reg_bits = 8,
374 .val_bits = 8,
375
376 .max_register = STA529_MAX_REGISTER,
377 .readable_reg = sta529_readable,
378
379 .cache_type = REGCACHE_RBTREE,
380 .reg_defaults = sta529_reg_defaults,
381 .num_reg_defaults = ARRAY_SIZE(sta529_reg_defaults),
382};
383
384static int sta529_i2c_probe(struct i2c_client *i2c,
385 const struct i2c_device_id *id)
386{
387 struct sta529 *sta529;
388 int ret;
389
390 if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
391 return -EINVAL;
392
393 sta529 = devm_kzalloc(&i2c->dev, sizeof(struct sta529), GFP_KERNEL);
394 if (sta529 == NULL) {
395 dev_err(&i2c->dev, "Can not allocate memory\n");
396 return -ENOMEM;
397 }
398
399 sta529->regmap = devm_regmap_init_i2c(i2c, &sta529_regmap);
400 if (IS_ERR(sta529->regmap)) {
401 ret = PTR_ERR(sta529->regmap);
402 dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
403 return ret;
404 }
405
406 i2c_set_clientdata(i2c, sta529);
407
408 ret = snd_soc_register_codec(&i2c->dev,
409 &sta529_codec_driver, &sta529_dai, 1);
410 if (ret != 0)
411 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
412
413 return ret;
414}
415
416static int sta529_i2c_remove(struct i2c_client *client)
417{
418 snd_soc_unregister_codec(&client->dev);
419
420 return 0;
421}
422
423static const struct i2c_device_id sta529_i2c_id[] = {
424 { "sta529", 0 },
425 { }
426};
427MODULE_DEVICE_TABLE(i2c, sta529_i2c_id);
428
429static struct i2c_driver sta529_i2c_driver = {
430 .driver = {
431 .name = "sta529",
432 .owner = THIS_MODULE,
433 },
434 .probe = sta529_i2c_probe,
435 .remove = sta529_i2c_remove,
436 .id_table = sta529_i2c_id,
437};
438
439module_i2c_driver(sta529_i2c_driver);
440
441MODULE_DESCRIPTION("ASoC STA529 codec driver");
442MODULE_AUTHOR("Rajeev Kumar <rajeev-dlh.kumar@st.com>");
443MODULE_LICENSE("GPL");