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1274738d BS |
1 | /* |
2 | * File: sound/soc/codecs/ad1938.c | |
3 | * Author: Barry Song <Barry.Song@analog.com> | |
4 | * | |
5 | * Created: June 04 2009 | |
6 | * Description: Driver for AD1938 sound chip | |
7 | * | |
8 | * Modified: | |
9 | * Copyright 2009 Analog Devices Inc. | |
10 | * | |
11 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, see the file COPYING, or write | |
25 | * to the Free Software Foundation, Inc., | |
26 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
27 | */ | |
28 | ||
29 | #include <linux/init.h> | |
30 | #include <linux/module.h> | |
1274738d BS |
31 | #include <linux/kernel.h> |
32 | #include <linux/device.h> | |
33 | #include <sound/core.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/initval.h> | |
37 | #include <sound/soc.h> | |
38 | #include <sound/tlv.h> | |
39 | #include <sound/soc-dapm.h> | |
40 | #include <linux/spi/spi.h> | |
41 | #include "ad1938.h" | |
42 | ||
43 | /* codec private data */ | |
44 | struct ad1938_priv { | |
bca14657 | 45 | struct snd_soc_codec codec; |
1274738d | 46 | u8 reg_cache[AD1938_NUM_REGS]; |
1274738d BS |
47 | }; |
48 | ||
49 | static struct snd_soc_codec *ad1938_codec; | |
50 | struct snd_soc_codec_device soc_codec_dev_ad1938; | |
51 | static int ad1938_register(struct ad1938_priv *ad1938); | |
52 | static void ad1938_unregister(struct ad1938_priv *ad1938); | |
53 | ||
54 | /* | |
55 | * AD1938 volume/mute/de-emphasis etc. controls | |
56 | */ | |
57 | static const char *ad1938_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"}; | |
58 | ||
59 | static const struct soc_enum ad1938_deemp_enum = | |
60 | SOC_ENUM_SINGLE(AD1938_DAC_CTRL2, 1, 4, ad1938_deemp); | |
61 | ||
62 | static const struct snd_kcontrol_new ad1938_snd_controls[] = { | |
63 | /* DAC volume control */ | |
64 | SOC_DOUBLE_R("DAC1 Volume", AD1938_DAC_L1_VOL, | |
65 | AD1938_DAC_R1_VOL, 0, 0xFF, 1), | |
66 | SOC_DOUBLE_R("DAC2 Volume", AD1938_DAC_L2_VOL, | |
67 | AD1938_DAC_R2_VOL, 0, 0xFF, 1), | |
68 | SOC_DOUBLE_R("DAC3 Volume", AD1938_DAC_L3_VOL, | |
69 | AD1938_DAC_R3_VOL, 0, 0xFF, 1), | |
70 | SOC_DOUBLE_R("DAC4 Volume", AD1938_DAC_L4_VOL, | |
71 | AD1938_DAC_R4_VOL, 0, 0xFF, 1), | |
72 | ||
73 | /* ADC switch control */ | |
3a39f832 BS |
74 | SOC_DOUBLE("ADC1 Switch", AD1938_ADC_CTRL0, AD1938_ADCL1_MUTE, |
75 | AD1938_ADCR1_MUTE, 1, 1), | |
76 | SOC_DOUBLE("ADC2 Switch", AD1938_ADC_CTRL0, AD1938_ADCL2_MUTE, | |
77 | AD1938_ADCR2_MUTE, 1, 1), | |
1274738d BS |
78 | |
79 | /* DAC switch control */ | |
3a39f832 BS |
80 | SOC_DOUBLE("DAC1 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL1_MUTE, |
81 | AD1938_DACR1_MUTE, 1, 1), | |
82 | SOC_DOUBLE("DAC2 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL2_MUTE, | |
83 | AD1938_DACR2_MUTE, 1, 1), | |
84 | SOC_DOUBLE("DAC3 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL3_MUTE, | |
85 | AD1938_DACR3_MUTE, 1, 1), | |
86 | SOC_DOUBLE("DAC4 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL4_MUTE, | |
87 | AD1938_DACR4_MUTE, 1, 1), | |
1274738d BS |
88 | |
89 | /* ADC high-pass filter */ | |
90 | SOC_SINGLE("ADC High Pass Filter Switch", AD1938_ADC_CTRL0, | |
91 | AD1938_ADC_HIGHPASS_FILTER, 1, 0), | |
92 | ||
93 | /* DAC de-emphasis */ | |
94 | SOC_ENUM("Playback Deemphasis", ad1938_deemp_enum), | |
95 | }; | |
96 | ||
97 | static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = { | |
98 | SND_SOC_DAPM_DAC("DAC", "Playback", AD1938_DAC_CTRL0, 0, 1), | |
99 | SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), | |
100 | SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1938_ADC_CTRL0, 0, 1, NULL, 0), | |
c4ff357a BS |
101 | SND_SOC_DAPM_OUTPUT("DAC1OUT"), |
102 | SND_SOC_DAPM_OUTPUT("DAC2OUT"), | |
103 | SND_SOC_DAPM_OUTPUT("DAC3OUT"), | |
104 | SND_SOC_DAPM_OUTPUT("DAC4OUT"), | |
105 | SND_SOC_DAPM_INPUT("ADC1IN"), | |
106 | SND_SOC_DAPM_INPUT("ADC2IN"), | |
1274738d BS |
107 | }; |
108 | ||
109 | static const struct snd_soc_dapm_route audio_paths[] = { | |
110 | { "DAC", NULL, "ADC_PWR" }, | |
111 | { "ADC", NULL, "ADC_PWR" }, | |
c4ff357a BS |
112 | { "DAC1OUT", "DAC1 Switch", "DAC" }, |
113 | { "DAC2OUT", "DAC2 Switch", "DAC" }, | |
114 | { "DAC3OUT", "DAC3 Switch", "DAC" }, | |
115 | { "DAC4OUT", "DAC4 Switch", "DAC" }, | |
116 | { "ADC", "ADC1 Switch", "ADC1IN" }, | |
117 | { "ADC", "ADC2 Switch", "ADC2IN" }, | |
1274738d BS |
118 | }; |
119 | ||
120 | /* | |
121 | * DAI ops entries | |
122 | */ | |
123 | ||
124 | static int ad1938_mute(struct snd_soc_dai *dai, int mute) | |
125 | { | |
126 | struct snd_soc_codec *codec = dai->codec; | |
127 | int reg; | |
128 | ||
129 | reg = codec->read(codec, AD1938_DAC_CTRL2); | |
3a39f832 BS |
130 | reg = (mute > 0) ? reg | AD1938_DAC_MASTER_MUTE : reg & |
131 | (~AD1938_DAC_MASTER_MUTE); | |
1274738d BS |
132 | codec->write(codec, AD1938_DAC_CTRL2, reg); |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
137 | static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd) | |
138 | { | |
139 | int reg = codec->read(codec, AD1938_PLL_CLK_CTRL0); | |
3a39f832 BS |
140 | reg = (cmd > 0) ? reg & (~AD1938_PLL_POWERDOWN) : reg | |
141 | AD1938_PLL_POWERDOWN; | |
1274738d BS |
142 | codec->write(codec, AD1938_PLL_CLK_CTRL0, reg); |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
d2a38214 MB |
147 | static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, |
148 | unsigned int mask, int slots, int width) | |
1274738d BS |
149 | { |
150 | struct snd_soc_codec *codec = dai->codec; | |
151 | int dac_reg = codec->read(codec, AD1938_DAC_CTRL1); | |
152 | int adc_reg = codec->read(codec, AD1938_ADC_CTRL2); | |
153 | ||
154 | dac_reg &= ~AD1938_DAC_CHAN_MASK; | |
155 | adc_reg &= ~AD1938_ADC_CHAN_MASK; | |
156 | ||
bca14657 | 157 | switch (slots) { |
1274738d BS |
158 | case 2: |
159 | dac_reg |= AD1938_DAC_2_CHANNELS << AD1938_DAC_CHAN_SHFT; | |
160 | adc_reg |= AD1938_ADC_2_CHANNELS << AD1938_ADC_CHAN_SHFT; | |
161 | break; | |
162 | case 4: | |
163 | dac_reg |= AD1938_DAC_4_CHANNELS << AD1938_DAC_CHAN_SHFT; | |
164 | adc_reg |= AD1938_ADC_4_CHANNELS << AD1938_ADC_CHAN_SHFT; | |
165 | break; | |
166 | case 8: | |
167 | dac_reg |= AD1938_DAC_8_CHANNELS << AD1938_DAC_CHAN_SHFT; | |
168 | adc_reg |= AD1938_ADC_8_CHANNELS << AD1938_ADC_CHAN_SHFT; | |
169 | break; | |
170 | case 16: | |
171 | dac_reg |= AD1938_DAC_16_CHANNELS << AD1938_DAC_CHAN_SHFT; | |
172 | adc_reg |= AD1938_ADC_16_CHANNELS << AD1938_ADC_CHAN_SHFT; | |
173 | break; | |
174 | default: | |
175 | return -EINVAL; | |
176 | } | |
177 | ||
178 | codec->write(codec, AD1938_DAC_CTRL1, dac_reg); | |
179 | codec->write(codec, AD1938_ADC_CTRL2, adc_reg); | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | static int ad1938_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
185 | unsigned int fmt) | |
186 | { | |
187 | struct snd_soc_codec *codec = codec_dai->codec; | |
188 | int adc_reg, dac_reg; | |
189 | ||
190 | adc_reg = codec->read(codec, AD1938_ADC_CTRL2); | |
191 | dac_reg = codec->read(codec, AD1938_DAC_CTRL1); | |
192 | ||
3a39f832 BS |
193 | /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S |
194 | * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A) | |
1274738d BS |
195 | */ |
196 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
197 | case SND_SOC_DAIFMT_I2S: | |
198 | adc_reg &= ~AD1938_ADC_SERFMT_MASK; | |
199 | adc_reg |= AD1938_ADC_SERFMT_TDM; | |
200 | break; | |
201 | case SND_SOC_DAIFMT_DSP_A: | |
202 | adc_reg &= ~AD1938_ADC_SERFMT_MASK; | |
203 | adc_reg |= AD1938_ADC_SERFMT_AUX; | |
204 | break; | |
205 | default: | |
206 | return -EINVAL; | |
207 | } | |
208 | ||
209 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
210 | case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */ | |
211 | adc_reg &= ~AD1938_ADC_LEFT_HIGH; | |
212 | adc_reg &= ~AD1938_ADC_BCLK_INV; | |
213 | dac_reg &= ~AD1938_DAC_LEFT_HIGH; | |
214 | dac_reg &= ~AD1938_DAC_BCLK_INV; | |
215 | break; | |
216 | case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */ | |
217 | adc_reg |= AD1938_ADC_LEFT_HIGH; | |
218 | adc_reg &= ~AD1938_ADC_BCLK_INV; | |
219 | dac_reg |= AD1938_DAC_LEFT_HIGH; | |
220 | dac_reg &= ~AD1938_DAC_BCLK_INV; | |
221 | break; | |
222 | case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */ | |
223 | adc_reg &= ~AD1938_ADC_LEFT_HIGH; | |
224 | adc_reg |= AD1938_ADC_BCLK_INV; | |
225 | dac_reg &= ~AD1938_DAC_LEFT_HIGH; | |
226 | dac_reg |= AD1938_DAC_BCLK_INV; | |
227 | break; | |
228 | ||
229 | case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */ | |
230 | adc_reg |= AD1938_ADC_LEFT_HIGH; | |
231 | adc_reg |= AD1938_ADC_BCLK_INV; | |
232 | dac_reg |= AD1938_DAC_LEFT_HIGH; | |
233 | dac_reg |= AD1938_DAC_BCLK_INV; | |
234 | break; | |
235 | default: | |
236 | return -EINVAL; | |
237 | } | |
238 | ||
239 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
240 | case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */ | |
241 | adc_reg |= AD1938_ADC_LCR_MASTER; | |
242 | adc_reg |= AD1938_ADC_BCLK_MASTER; | |
243 | dac_reg |= AD1938_DAC_LCR_MASTER; | |
244 | dac_reg |= AD1938_DAC_BCLK_MASTER; | |
245 | break; | |
246 | case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */ | |
247 | adc_reg |= AD1938_ADC_LCR_MASTER; | |
248 | adc_reg &= ~AD1938_ADC_BCLK_MASTER; | |
249 | dac_reg |= AD1938_DAC_LCR_MASTER; | |
250 | dac_reg &= ~AD1938_DAC_BCLK_MASTER; | |
251 | break; | |
252 | case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */ | |
253 | adc_reg &= ~AD1938_ADC_LCR_MASTER; | |
254 | adc_reg |= AD1938_ADC_BCLK_MASTER; | |
255 | dac_reg &= ~AD1938_DAC_LCR_MASTER; | |
256 | dac_reg |= AD1938_DAC_BCLK_MASTER; | |
257 | break; | |
258 | case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */ | |
259 | adc_reg &= ~AD1938_ADC_LCR_MASTER; | |
260 | adc_reg &= ~AD1938_ADC_BCLK_MASTER; | |
261 | dac_reg &= ~AD1938_DAC_LCR_MASTER; | |
262 | dac_reg &= ~AD1938_DAC_BCLK_MASTER; | |
263 | break; | |
264 | default: | |
265 | return -EINVAL; | |
266 | } | |
267 | ||
268 | codec->write(codec, AD1938_ADC_CTRL2, adc_reg); | |
269 | codec->write(codec, AD1938_DAC_CTRL1, dac_reg); | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static int ad1938_hw_params(struct snd_pcm_substream *substream, | |
275 | struct snd_pcm_hw_params *params, | |
276 | struct snd_soc_dai *dai) | |
277 | { | |
278 | int word_len = 0, reg = 0; | |
279 | ||
280 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
281 | struct snd_soc_device *socdev = rtd->socdev; | |
282 | struct snd_soc_codec *codec = socdev->card->codec; | |
283 | ||
284 | /* bit size */ | |
285 | switch (params_format(params)) { | |
286 | case SNDRV_PCM_FORMAT_S16_LE: | |
287 | word_len = 3; | |
288 | break; | |
289 | case SNDRV_PCM_FORMAT_S20_3LE: | |
290 | word_len = 1; | |
291 | break; | |
292 | case SNDRV_PCM_FORMAT_S24_LE: | |
293 | case SNDRV_PCM_FORMAT_S32_LE: | |
294 | word_len = 0; | |
295 | break; | |
296 | } | |
297 | ||
298 | reg = codec->read(codec, AD1938_DAC_CTRL2); | |
299 | reg = (reg & (~AD1938_DAC_WORD_LEN_MASK)) | word_len; | |
300 | codec->write(codec, AD1938_DAC_CTRL2, reg); | |
301 | ||
302 | reg = codec->read(codec, AD1938_ADC_CTRL1); | |
303 | reg = (reg & (~AD1938_ADC_WORD_LEN_MASK)) | word_len; | |
304 | codec->write(codec, AD1938_ADC_CTRL1, reg); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | static int ad1938_set_bias_level(struct snd_soc_codec *codec, | |
310 | enum snd_soc_bias_level level) | |
311 | { | |
312 | switch (level) { | |
313 | case SND_SOC_BIAS_ON: | |
314 | ad1938_pll_powerctrl(codec, 1); | |
315 | break; | |
316 | case SND_SOC_BIAS_PREPARE: | |
317 | break; | |
318 | case SND_SOC_BIAS_STANDBY: | |
319 | case SND_SOC_BIAS_OFF: | |
320 | ad1938_pll_powerctrl(codec, 0); | |
321 | break; | |
322 | } | |
323 | codec->bias_level = level; | |
324 | return 0; | |
325 | } | |
326 | ||
327 | /* | |
328 | * interface to read/write ad1938 register | |
329 | */ | |
330 | ||
331 | #define AD1938_SPI_ADDR 0x4 | |
332 | #define AD1938_SPI_READ 0x1 | |
333 | #define AD1938_SPI_BUFLEN 3 | |
334 | ||
335 | /* | |
336 | * write to the ad1938 register space | |
337 | */ | |
338 | ||
339 | static int ad1938_write_reg(struct snd_soc_codec *codec, unsigned int reg, | |
340 | unsigned int value) | |
341 | { | |
342 | u8 *reg_cache = codec->reg_cache; | |
343 | int ret = 0; | |
344 | ||
bca14657 | 345 | if (value != reg_cache[reg]) { |
1274738d BS |
346 | uint8_t buf[AD1938_SPI_BUFLEN]; |
347 | struct spi_transfer t = { | |
348 | .tx_buf = buf, | |
349 | .len = AD1938_SPI_BUFLEN, | |
350 | }; | |
351 | struct spi_message m; | |
352 | ||
353 | buf[0] = AD1938_SPI_ADDR << 1; | |
354 | buf[1] = reg; | |
355 | buf[2] = value; | |
356 | spi_message_init(&m); | |
357 | spi_message_add_tail(&t, &m); | |
bca14657 MB |
358 | ret = spi_sync(codec->control_data, &m); |
359 | if (ret == 0) | |
1274738d BS |
360 | reg_cache[reg] = value; |
361 | } | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
366 | /* | |
367 | * read from the ad1938 register space cache | |
368 | */ | |
369 | ||
370 | static unsigned int ad1938_read_reg_cache(struct snd_soc_codec *codec, | |
bca14657 | 371 | unsigned int reg) |
1274738d | 372 | { |
bca14657 | 373 | u8 *reg_cache = codec->reg_cache; |
1274738d | 374 | |
bca14657 MB |
375 | if (reg >= codec->reg_cache_size) |
376 | return -EINVAL; | |
1274738d | 377 | |
bca14657 | 378 | return reg_cache[reg]; |
1274738d BS |
379 | } |
380 | ||
381 | /* | |
382 | * read from the ad1938 register space | |
383 | */ | |
384 | ||
3a39f832 BS |
385 | static unsigned int ad1938_read_reg(struct snd_soc_codec *codec, |
386 | unsigned int reg) | |
1274738d BS |
387 | { |
388 | char w_buf[AD1938_SPI_BUFLEN]; | |
389 | char r_buf[AD1938_SPI_BUFLEN]; | |
390 | int ret; | |
391 | ||
392 | struct spi_transfer t = { | |
393 | .tx_buf = w_buf, | |
394 | .rx_buf = r_buf, | |
395 | .len = AD1938_SPI_BUFLEN, | |
396 | }; | |
397 | struct spi_message m; | |
398 | ||
399 | w_buf[0] = (AD1938_SPI_ADDR << 1) | AD1938_SPI_READ; | |
400 | w_buf[1] = reg; | |
401 | w_buf[2] = 0; | |
402 | ||
403 | spi_message_init(&m); | |
404 | spi_message_add_tail(&t, &m); | |
405 | ret = spi_sync(codec->control_data, &m); | |
406 | if (ret == 0) | |
407 | return r_buf[2]; | |
408 | else | |
409 | return -EIO; | |
410 | } | |
411 | ||
412 | static int ad1938_fill_cache(struct snd_soc_codec *codec) | |
413 | { | |
bca14657 MB |
414 | int i; |
415 | u8 *reg_cache = codec->reg_cache; | |
416 | struct spi_device *spi = codec->control_data; | |
417 | ||
418 | for (i = 0; i < codec->reg_cache_size; i++) { | |
419 | int ret = ad1938_read_reg(codec, i); | |
420 | if (ret == -EIO) { | |
421 | dev_err(&spi->dev, "AD1938 SPI read failure\n"); | |
422 | return ret; | |
423 | } | |
424 | reg_cache[i] = ret; | |
425 | } | |
426 | ||
427 | return 0; | |
1274738d BS |
428 | } |
429 | ||
430 | static int __devinit ad1938_spi_probe(struct spi_device *spi) | |
431 | { | |
432 | struct snd_soc_codec *codec; | |
433 | struct ad1938_priv *ad1938; | |
434 | ||
435 | ad1938 = kzalloc(sizeof(struct ad1938_priv), GFP_KERNEL); | |
436 | if (ad1938 == NULL) | |
437 | return -ENOMEM; | |
438 | ||
439 | codec = &ad1938->codec; | |
440 | codec->control_data = spi; | |
441 | codec->dev = &spi->dev; | |
442 | ||
416c8fe3 | 443 | dev_set_drvdata(&spi->dev, ad1938); |
1274738d BS |
444 | |
445 | return ad1938_register(ad1938); | |
446 | } | |
447 | ||
448 | static int __devexit ad1938_spi_remove(struct spi_device *spi) | |
449 | { | |
416c8fe3 | 450 | struct ad1938_priv *ad1938 = dev_get_drvdata(&spi->dev); |
1274738d BS |
451 | |
452 | ad1938_unregister(ad1938); | |
453 | return 0; | |
454 | } | |
455 | ||
456 | static struct spi_driver ad1938_spi_driver = { | |
457 | .driver = { | |
2a708137 | 458 | .name = "ad1938", |
1274738d BS |
459 | .owner = THIS_MODULE, |
460 | }, | |
461 | .probe = ad1938_spi_probe, | |
462 | .remove = __devexit_p(ad1938_spi_remove), | |
463 | }; | |
464 | ||
465 | static struct snd_soc_dai_ops ad1938_dai_ops = { | |
466 | .hw_params = ad1938_hw_params, | |
467 | .digital_mute = ad1938_mute, | |
468 | .set_tdm_slot = ad1938_set_tdm_slot, | |
469 | .set_fmt = ad1938_set_dai_fmt, | |
470 | }; | |
471 | ||
472 | /* codec DAI instance */ | |
473 | struct snd_soc_dai ad1938_dai = { | |
474 | .name = "AD1938", | |
475 | .playback = { | |
476 | .stream_name = "Playback", | |
477 | .channels_min = 2, | |
478 | .channels_max = 8, | |
479 | .rates = SNDRV_PCM_RATE_48000, | |
480 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | |
481 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | |
482 | }, | |
483 | .capture = { | |
484 | .stream_name = "Capture", | |
485 | .channels_min = 2, | |
486 | .channels_max = 4, | |
487 | .rates = SNDRV_PCM_RATE_48000, | |
488 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | |
489 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | |
490 | }, | |
491 | .ops = &ad1938_dai_ops, | |
492 | }; | |
493 | EXPORT_SYMBOL_GPL(ad1938_dai); | |
494 | ||
495 | static int ad1938_register(struct ad1938_priv *ad1938) | |
496 | { | |
497 | int ret; | |
498 | struct snd_soc_codec *codec = &ad1938->codec; | |
499 | ||
500 | if (ad1938_codec) { | |
501 | dev_err(codec->dev, "Another ad1938 is registered\n"); | |
502 | return -EINVAL; | |
503 | } | |
504 | ||
505 | mutex_init(&codec->mutex); | |
506 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
507 | INIT_LIST_HEAD(&codec->dapm_paths); | |
508 | codec->private_data = ad1938; | |
509 | codec->reg_cache = ad1938->reg_cache; | |
510 | codec->reg_cache_size = AD1938_NUM_REGS; | |
511 | codec->name = "AD1938"; | |
512 | codec->owner = THIS_MODULE; | |
513 | codec->dai = &ad1938_dai; | |
514 | codec->num_dai = 1; | |
515 | codec->write = ad1938_write_reg; | |
516 | codec->read = ad1938_read_reg_cache; | |
98235a4b | 517 | codec->set_bias_level = ad1938_set_bias_level; |
1274738d BS |
518 | INIT_LIST_HEAD(&codec->dapm_widgets); |
519 | INIT_LIST_HEAD(&codec->dapm_paths); | |
520 | ||
bca14657 MB |
521 | ad1938_dai.dev = codec->dev; |
522 | ad1938_codec = codec; | |
1274738d BS |
523 | |
524 | /* default setting for ad1938 */ | |
3a39f832 BS |
525 | |
526 | /* unmute dac channels */ | |
527 | codec->write(codec, AD1938_DAC_CHNL_MUTE, 0x0); | |
528 | /* de-emphasis: 48kHz, powedown dac */ | |
529 | codec->write(codec, AD1938_DAC_CTRL2, 0x1A); | |
530 | /* powerdown dac, dac in tdm mode */ | |
531 | codec->write(codec, AD1938_DAC_CTRL0, 0x41); | |
532 | /* high-pass filter enable */ | |
533 | codec->write(codec, AD1938_ADC_CTRL0, 0x3); | |
534 | /* sata delay=1, adc aux mode */ | |
535 | codec->write(codec, AD1938_ADC_CTRL1, 0x43); | |
536 | /* pll input: mclki/xi */ | |
537 | codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9D); | |
1274738d BS |
538 | codec->write(codec, AD1938_PLL_CLK_CTRL1, 0x04); |
539 | ||
540 | ad1938_fill_cache(codec); | |
541 | ||
bca14657 MB |
542 | ret = snd_soc_register_codec(codec); |
543 | if (ret != 0) { | |
544 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
2a708137 | 545 | kfree(ad1938); |
bca14657 MB |
546 | return ret; |
547 | } | |
1274738d | 548 | |
bca14657 MB |
549 | ret = snd_soc_register_dai(&ad1938_dai); |
550 | if (ret != 0) { | |
551 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
552 | snd_soc_unregister_codec(codec); | |
2a708137 | 553 | kfree(ad1938); |
bca14657 MB |
554 | return ret; |
555 | } | |
1274738d | 556 | |
bca14657 | 557 | return 0; |
1274738d BS |
558 | } |
559 | ||
560 | static void ad1938_unregister(struct ad1938_priv *ad1938) | |
561 | { | |
bca14657 MB |
562 | ad1938_set_bias_level(&ad1938->codec, SND_SOC_BIAS_OFF); |
563 | snd_soc_unregister_dai(&ad1938_dai); | |
564 | snd_soc_unregister_codec(&ad1938->codec); | |
565 | kfree(ad1938); | |
566 | ad1938_codec = NULL; | |
1274738d BS |
567 | } |
568 | ||
569 | static int ad1938_probe(struct platform_device *pdev) | |
570 | { | |
bca14657 MB |
571 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
572 | struct snd_soc_codec *codec; | |
573 | int ret = 0; | |
574 | ||
575 | if (ad1938_codec == NULL) { | |
576 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
577 | return -ENODEV; | |
578 | } | |
579 | ||
580 | socdev->card->codec = ad1938_codec; | |
581 | codec = ad1938_codec; | |
582 | ||
583 | /* register pcms */ | |
584 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
585 | if (ret < 0) { | |
586 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
587 | goto pcm_err; | |
588 | } | |
589 | ||
590 | snd_soc_add_controls(codec, ad1938_snd_controls, | |
591 | ARRAY_SIZE(ad1938_snd_controls)); | |
592 | snd_soc_dapm_new_controls(codec, ad1938_dapm_widgets, | |
593 | ARRAY_SIZE(ad1938_dapm_widgets)); | |
1274738d | 594 | snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); |
1274738d BS |
595 | |
596 | ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
597 | ||
1274738d | 598 | pcm_err: |
bca14657 | 599 | return ret; |
1274738d BS |
600 | } |
601 | ||
602 | /* power down chip */ | |
603 | static int ad1938_remove(struct platform_device *pdev) | |
604 | { | |
bca14657 | 605 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
1274738d | 606 | |
bca14657 MB |
607 | snd_soc_free_pcms(socdev); |
608 | snd_soc_dapm_free(socdev); | |
1274738d | 609 | |
bca14657 | 610 | return 0; |
1274738d BS |
611 | } |
612 | ||
613 | #ifdef CONFIG_PM | |
614 | static int ad1938_suspend(struct platform_device *pdev, | |
615 | pm_message_t state) | |
616 | { | |
617 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
618 | struct snd_soc_codec *codec = socdev->card->codec; | |
619 | ||
620 | ad1938_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
621 | return 0; | |
622 | } | |
623 | ||
624 | static int ad1938_resume(struct platform_device *pdev) | |
625 | { | |
626 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
627 | struct snd_soc_codec *codec = socdev->card->codec; | |
628 | ||
629 | if (codec->suspend_bias_level == SND_SOC_BIAS_ON) | |
630 | ad1938_set_bias_level(codec, SND_SOC_BIAS_ON); | |
631 | ||
632 | return 0; | |
633 | } | |
634 | #else | |
635 | #define ad1938_suspend NULL | |
636 | #define ad1938_resume NULL | |
637 | #endif | |
638 | ||
639 | struct snd_soc_codec_device soc_codec_dev_ad1938 = { | |
640 | .probe = ad1938_probe, | |
641 | .remove = ad1938_remove, | |
642 | .suspend = ad1938_suspend, | |
643 | .resume = ad1938_resume, | |
644 | }; | |
645 | EXPORT_SYMBOL_GPL(soc_codec_dev_ad1938); | |
646 | ||
647 | static int __init ad1938_init(void) | |
648 | { | |
649 | int ret; | |
650 | ||
651 | ret = spi_register_driver(&ad1938_spi_driver); | |
652 | if (ret != 0) { | |
653 | printk(KERN_ERR "Failed to register ad1938 SPI driver: %d\n", | |
654 | ret); | |
655 | } | |
656 | ||
657 | return ret; | |
658 | } | |
659 | module_init(ad1938_init); | |
660 | ||
661 | static void __exit ad1938_exit(void) | |
662 | { | |
663 | spi_unregister_driver(&ad1938_spi_driver); | |
664 | } | |
665 | module_exit(ad1938_exit); | |
666 | ||
667 | MODULE_DESCRIPTION("ASoC ad1938 driver"); | |
668 | MODULE_AUTHOR("Barry Song "); | |
669 | MODULE_LICENSE("GPL"); |