Barry Song | 1274738 | 2009-07-16 16:00:05 +0800 | [diff] [blame^] | 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> |
| 31 | #include <linux/version.h> |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/device.h> |
| 34 | #include <sound/core.h> |
| 35 | #include <sound/pcm.h> |
| 36 | #include <sound/pcm_params.h> |
| 37 | #include <sound/initval.h> |
| 38 | #include <sound/soc.h> |
| 39 | #include <sound/tlv.h> |
| 40 | #include <sound/soc-dapm.h> |
| 41 | #include <linux/spi/spi.h> |
| 42 | #include "ad1938.h" |
| 43 | |
| 44 | /* codec private data */ |
| 45 | struct ad1938_priv { |
| 46 | struct snd_soc_codec codec; |
| 47 | u8 reg_cache[AD1938_NUM_REGS]; |
| 48 | |
| 49 | }; |
| 50 | |
| 51 | static struct snd_soc_codec *ad1938_codec; |
| 52 | struct snd_soc_codec_device soc_codec_dev_ad1938; |
| 53 | static int ad1938_register(struct ad1938_priv *ad1938); |
| 54 | static void ad1938_unregister(struct ad1938_priv *ad1938); |
| 55 | |
| 56 | /* |
| 57 | * AD1938 volume/mute/de-emphasis etc. controls |
| 58 | */ |
| 59 | static const char *ad1938_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"}; |
| 60 | |
| 61 | static const struct soc_enum ad1938_deemp_enum = |
| 62 | SOC_ENUM_SINGLE(AD1938_DAC_CTRL2, 1, 4, ad1938_deemp); |
| 63 | |
| 64 | static const struct snd_kcontrol_new ad1938_snd_controls[] = { |
| 65 | /* DAC volume control */ |
| 66 | SOC_DOUBLE_R("DAC1 Volume", AD1938_DAC_L1_VOL, |
| 67 | AD1938_DAC_R1_VOL, 0, 0xFF, 1), |
| 68 | SOC_DOUBLE_R("DAC2 Volume", AD1938_DAC_L2_VOL, |
| 69 | AD1938_DAC_R2_VOL, 0, 0xFF, 1), |
| 70 | SOC_DOUBLE_R("DAC3 Volume", AD1938_DAC_L3_VOL, |
| 71 | AD1938_DAC_R3_VOL, 0, 0xFF, 1), |
| 72 | SOC_DOUBLE_R("DAC4 Volume", AD1938_DAC_L4_VOL, |
| 73 | AD1938_DAC_R4_VOL, 0, 0xFF, 1), |
| 74 | |
| 75 | /* ADC switch control */ |
| 76 | SOC_DOUBLE("ADC1 Switch", AD1938_ADC_CTRL0, AD1938_ADCL1_MUTE, AD1938_ADCR1_MUTE, 1, 1), |
| 77 | SOC_DOUBLE("ADC2 Switch", AD1938_ADC_CTRL0, AD1938_ADCL2_MUTE, AD1938_ADCR2_MUTE, 1, 1), |
| 78 | |
| 79 | /* DAC switch control */ |
| 80 | SOC_DOUBLE("DAC1 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL1_MUTE, AD1938_DACR1_MUTE, 1, 1), |
| 81 | SOC_DOUBLE("DAC2 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL2_MUTE, AD1938_DACR2_MUTE, 1, 1), |
| 82 | SOC_DOUBLE("DAC3 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL3_MUTE, AD1938_DACR3_MUTE, 1, 1), |
| 83 | SOC_DOUBLE("DAC4 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL4_MUTE, AD1938_DACR4_MUTE, 1, 1), |
| 84 | |
| 85 | /* ADC high-pass filter */ |
| 86 | SOC_SINGLE("ADC High Pass Filter Switch", AD1938_ADC_CTRL0, |
| 87 | AD1938_ADC_HIGHPASS_FILTER, 1, 0), |
| 88 | |
| 89 | /* DAC de-emphasis */ |
| 90 | SOC_ENUM("Playback Deemphasis", ad1938_deemp_enum), |
| 91 | }; |
| 92 | |
| 93 | static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = { |
| 94 | SND_SOC_DAPM_DAC("DAC", "Playback", AD1938_DAC_CTRL0, 0, 1), |
| 95 | SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), |
| 96 | SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1938_ADC_CTRL0, 0, 1, NULL, 0), |
| 97 | }; |
| 98 | |
| 99 | static const struct snd_soc_dapm_route audio_paths[] = { |
| 100 | { "DAC", NULL, "ADC_PWR" }, |
| 101 | { "ADC", NULL, "ADC_PWR" }, |
| 102 | }; |
| 103 | |
| 104 | /* |
| 105 | * DAI ops entries |
| 106 | */ |
| 107 | |
| 108 | static int ad1938_mute(struct snd_soc_dai *dai, int mute) |
| 109 | { |
| 110 | struct snd_soc_codec *codec = dai->codec; |
| 111 | int reg; |
| 112 | |
| 113 | reg = codec->read(codec, AD1938_DAC_CTRL2); |
| 114 | reg = (mute > 0) ? reg | AD1938_DAC_MASTER_MUTE : reg & (~AD1938_DAC_MASTER_MUTE); |
| 115 | codec->write(codec, AD1938_DAC_CTRL2, reg); |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd) |
| 121 | { |
| 122 | int reg = codec->read(codec, AD1938_PLL_CLK_CTRL0); |
| 123 | reg = (cmd > 0) ? reg & (~AD1938_PLL_POWERDOWN) : reg | AD1938_PLL_POWERDOWN; |
| 124 | codec->write(codec, AD1938_PLL_CLK_CTRL0, reg); |
| 125 | |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int ad1938_set_tdm_slot(struct snd_soc_dai *dai, |
| 130 | unsigned int mask, int slots) |
| 131 | { |
| 132 | struct snd_soc_codec *codec = dai->codec; |
| 133 | int dac_reg = codec->read(codec, AD1938_DAC_CTRL1); |
| 134 | int adc_reg = codec->read(codec, AD1938_ADC_CTRL2); |
| 135 | |
| 136 | dac_reg &= ~AD1938_DAC_CHAN_MASK; |
| 137 | adc_reg &= ~AD1938_ADC_CHAN_MASK; |
| 138 | |
| 139 | switch(slots) { |
| 140 | case 2: |
| 141 | dac_reg |= AD1938_DAC_2_CHANNELS << AD1938_DAC_CHAN_SHFT; |
| 142 | adc_reg |= AD1938_ADC_2_CHANNELS << AD1938_ADC_CHAN_SHFT; |
| 143 | break; |
| 144 | case 4: |
| 145 | dac_reg |= AD1938_DAC_4_CHANNELS << AD1938_DAC_CHAN_SHFT; |
| 146 | adc_reg |= AD1938_ADC_4_CHANNELS << AD1938_ADC_CHAN_SHFT; |
| 147 | break; |
| 148 | case 8: |
| 149 | dac_reg |= AD1938_DAC_8_CHANNELS << AD1938_DAC_CHAN_SHFT; |
| 150 | adc_reg |= AD1938_ADC_8_CHANNELS << AD1938_ADC_CHAN_SHFT; |
| 151 | break; |
| 152 | case 16: |
| 153 | dac_reg |= AD1938_DAC_16_CHANNELS << AD1938_DAC_CHAN_SHFT; |
| 154 | adc_reg |= AD1938_ADC_16_CHANNELS << AD1938_ADC_CHAN_SHFT; |
| 155 | break; |
| 156 | default: |
| 157 | return -EINVAL; |
| 158 | } |
| 159 | |
| 160 | codec->write(codec, AD1938_DAC_CTRL1, dac_reg); |
| 161 | codec->write(codec, AD1938_ADC_CTRL2, adc_reg); |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static int ad1938_set_dai_fmt(struct snd_soc_dai *codec_dai, |
| 167 | unsigned int fmt) |
| 168 | { |
| 169 | struct snd_soc_codec *codec = codec_dai->codec; |
| 170 | int adc_reg, dac_reg; |
| 171 | |
| 172 | adc_reg = codec->read(codec, AD1938_ADC_CTRL2); |
| 173 | dac_reg = codec->read(codec, AD1938_DAC_CTRL1); |
| 174 | |
| 175 | /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S with TDM) |
| 176 | * and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A) |
| 177 | */ |
| 178 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 179 | case SND_SOC_DAIFMT_I2S: |
| 180 | adc_reg &= ~AD1938_ADC_SERFMT_MASK; |
| 181 | adc_reg |= AD1938_ADC_SERFMT_TDM; |
| 182 | break; |
| 183 | case SND_SOC_DAIFMT_DSP_A: |
| 184 | adc_reg &= ~AD1938_ADC_SERFMT_MASK; |
| 185 | adc_reg |= AD1938_ADC_SERFMT_AUX; |
| 186 | break; |
| 187 | default: |
| 188 | return -EINVAL; |
| 189 | } |
| 190 | |
| 191 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 192 | case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */ |
| 193 | adc_reg &= ~AD1938_ADC_LEFT_HIGH; |
| 194 | adc_reg &= ~AD1938_ADC_BCLK_INV; |
| 195 | dac_reg &= ~AD1938_DAC_LEFT_HIGH; |
| 196 | dac_reg &= ~AD1938_DAC_BCLK_INV; |
| 197 | break; |
| 198 | case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */ |
| 199 | adc_reg |= AD1938_ADC_LEFT_HIGH; |
| 200 | adc_reg &= ~AD1938_ADC_BCLK_INV; |
| 201 | dac_reg |= AD1938_DAC_LEFT_HIGH; |
| 202 | dac_reg &= ~AD1938_DAC_BCLK_INV; |
| 203 | break; |
| 204 | case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */ |
| 205 | adc_reg &= ~AD1938_ADC_LEFT_HIGH; |
| 206 | adc_reg |= AD1938_ADC_BCLK_INV; |
| 207 | dac_reg &= ~AD1938_DAC_LEFT_HIGH; |
| 208 | dac_reg |= AD1938_DAC_BCLK_INV; |
| 209 | break; |
| 210 | |
| 211 | case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */ |
| 212 | adc_reg |= AD1938_ADC_LEFT_HIGH; |
| 213 | adc_reg |= AD1938_ADC_BCLK_INV; |
| 214 | dac_reg |= AD1938_DAC_LEFT_HIGH; |
| 215 | dac_reg |= AD1938_DAC_BCLK_INV; |
| 216 | break; |
| 217 | default: |
| 218 | return -EINVAL; |
| 219 | } |
| 220 | |
| 221 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 222 | case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */ |
| 223 | adc_reg |= AD1938_ADC_LCR_MASTER; |
| 224 | adc_reg |= AD1938_ADC_BCLK_MASTER; |
| 225 | dac_reg |= AD1938_DAC_LCR_MASTER; |
| 226 | dac_reg |= AD1938_DAC_BCLK_MASTER; |
| 227 | break; |
| 228 | case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */ |
| 229 | adc_reg |= AD1938_ADC_LCR_MASTER; |
| 230 | adc_reg &= ~AD1938_ADC_BCLK_MASTER; |
| 231 | dac_reg |= AD1938_DAC_LCR_MASTER; |
| 232 | dac_reg &= ~AD1938_DAC_BCLK_MASTER; |
| 233 | break; |
| 234 | case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */ |
| 235 | adc_reg &= ~AD1938_ADC_LCR_MASTER; |
| 236 | adc_reg |= AD1938_ADC_BCLK_MASTER; |
| 237 | dac_reg &= ~AD1938_DAC_LCR_MASTER; |
| 238 | dac_reg |= AD1938_DAC_BCLK_MASTER; |
| 239 | break; |
| 240 | case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */ |
| 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 | default: |
| 247 | return -EINVAL; |
| 248 | } |
| 249 | |
| 250 | codec->write(codec, AD1938_ADC_CTRL2, adc_reg); |
| 251 | codec->write(codec, AD1938_DAC_CTRL1, dac_reg); |
| 252 | |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static int ad1938_hw_params(struct snd_pcm_substream *substream, |
| 257 | struct snd_pcm_hw_params *params, |
| 258 | struct snd_soc_dai *dai) |
| 259 | { |
| 260 | int word_len = 0, reg = 0; |
| 261 | |
| 262 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 263 | struct snd_soc_device *socdev = rtd->socdev; |
| 264 | struct snd_soc_codec *codec = socdev->card->codec; |
| 265 | |
| 266 | /* bit size */ |
| 267 | switch (params_format(params)) { |
| 268 | case SNDRV_PCM_FORMAT_S16_LE: |
| 269 | word_len = 3; |
| 270 | break; |
| 271 | case SNDRV_PCM_FORMAT_S20_3LE: |
| 272 | word_len = 1; |
| 273 | break; |
| 274 | case SNDRV_PCM_FORMAT_S24_LE: |
| 275 | case SNDRV_PCM_FORMAT_S32_LE: |
| 276 | word_len = 0; |
| 277 | break; |
| 278 | } |
| 279 | |
| 280 | reg = codec->read(codec, AD1938_DAC_CTRL2); |
| 281 | reg = (reg & (~AD1938_DAC_WORD_LEN_MASK)) | word_len; |
| 282 | codec->write(codec, AD1938_DAC_CTRL2, reg); |
| 283 | |
| 284 | reg = codec->read(codec, AD1938_ADC_CTRL1); |
| 285 | reg = (reg & (~AD1938_ADC_WORD_LEN_MASK)) | word_len; |
| 286 | codec->write(codec, AD1938_ADC_CTRL1, reg); |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | static int ad1938_set_bias_level(struct snd_soc_codec *codec, |
| 292 | enum snd_soc_bias_level level) |
| 293 | { |
| 294 | switch (level) { |
| 295 | case SND_SOC_BIAS_ON: |
| 296 | ad1938_pll_powerctrl(codec, 1); |
| 297 | break; |
| 298 | case SND_SOC_BIAS_PREPARE: |
| 299 | break; |
| 300 | case SND_SOC_BIAS_STANDBY: |
| 301 | case SND_SOC_BIAS_OFF: |
| 302 | ad1938_pll_powerctrl(codec, 0); |
| 303 | break; |
| 304 | } |
| 305 | codec->bias_level = level; |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * interface to read/write ad1938 register |
| 311 | */ |
| 312 | |
| 313 | #define AD1938_SPI_ADDR 0x4 |
| 314 | #define AD1938_SPI_READ 0x1 |
| 315 | #define AD1938_SPI_BUFLEN 3 |
| 316 | |
| 317 | /* |
| 318 | * write to the ad1938 register space |
| 319 | */ |
| 320 | |
| 321 | static int ad1938_write_reg(struct snd_soc_codec *codec, unsigned int reg, |
| 322 | unsigned int value) |
| 323 | { |
| 324 | u8 *reg_cache = codec->reg_cache; |
| 325 | int ret = 0; |
| 326 | |
| 327 | if(value != reg_cache[reg]) { |
| 328 | uint8_t buf[AD1938_SPI_BUFLEN]; |
| 329 | struct spi_transfer t = { |
| 330 | .tx_buf = buf, |
| 331 | .len = AD1938_SPI_BUFLEN, |
| 332 | }; |
| 333 | struct spi_message m; |
| 334 | |
| 335 | buf[0] = AD1938_SPI_ADDR << 1; |
| 336 | buf[1] = reg; |
| 337 | buf[2] = value; |
| 338 | spi_message_init(&m); |
| 339 | spi_message_add_tail(&t, &m); |
| 340 | if((ret = spi_sync(codec->control_data, &m)) == 0) |
| 341 | reg_cache[reg] = value; |
| 342 | } |
| 343 | |
| 344 | return ret; |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * read from the ad1938 register space cache |
| 349 | */ |
| 350 | |
| 351 | static unsigned int ad1938_read_reg_cache(struct snd_soc_codec *codec, |
| 352 | unsigned int reg) |
| 353 | { |
| 354 | u8 *reg_cache = codec->reg_cache; |
| 355 | |
| 356 | if (reg >= codec->reg_cache_size) |
| 357 | return -EINVAL; |
| 358 | |
| 359 | return reg_cache[reg]; |
| 360 | } |
| 361 | |
| 362 | /* |
| 363 | * read from the ad1938 register space |
| 364 | */ |
| 365 | |
| 366 | static unsigned int ad1938_read_reg(struct snd_soc_codec *codec, unsigned int reg) |
| 367 | { |
| 368 | char w_buf[AD1938_SPI_BUFLEN]; |
| 369 | char r_buf[AD1938_SPI_BUFLEN]; |
| 370 | int ret; |
| 371 | |
| 372 | struct spi_transfer t = { |
| 373 | .tx_buf = w_buf, |
| 374 | .rx_buf = r_buf, |
| 375 | .len = AD1938_SPI_BUFLEN, |
| 376 | }; |
| 377 | struct spi_message m; |
| 378 | |
| 379 | w_buf[0] = (AD1938_SPI_ADDR << 1) | AD1938_SPI_READ; |
| 380 | w_buf[1] = reg; |
| 381 | w_buf[2] = 0; |
| 382 | |
| 383 | spi_message_init(&m); |
| 384 | spi_message_add_tail(&t, &m); |
| 385 | ret = spi_sync(codec->control_data, &m); |
| 386 | if (ret == 0) |
| 387 | return r_buf[2]; |
| 388 | else |
| 389 | return -EIO; |
| 390 | } |
| 391 | |
| 392 | static int ad1938_fill_cache(struct snd_soc_codec *codec) |
| 393 | { |
| 394 | int i; |
| 395 | u8 *reg_cache = codec->reg_cache; |
| 396 | struct spi_device *spi = codec->control_data; |
| 397 | |
| 398 | for (i = 0; i < codec->reg_cache_size; i++) { |
| 399 | int ret = ad1938_read_reg(codec, i); |
| 400 | if (ret == -EIO) { |
| 401 | dev_err(&spi->dev, "AD1938 SPI read failure\n"); |
| 402 | return ret; |
| 403 | } |
| 404 | reg_cache[i] = ret; |
| 405 | } |
| 406 | |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | static int __devinit ad1938_spi_probe(struct spi_device *spi) |
| 411 | { |
| 412 | struct snd_soc_codec *codec; |
| 413 | struct ad1938_priv *ad1938; |
| 414 | |
| 415 | ad1938 = kzalloc(sizeof(struct ad1938_priv), GFP_KERNEL); |
| 416 | if (ad1938 == NULL) |
| 417 | return -ENOMEM; |
| 418 | |
| 419 | codec = &ad1938->codec; |
| 420 | codec->control_data = spi; |
| 421 | codec->dev = &spi->dev; |
| 422 | |
| 423 | spi->dev.driver_data = ad1938; |
| 424 | |
| 425 | return ad1938_register(ad1938); |
| 426 | } |
| 427 | |
| 428 | static int __devexit ad1938_spi_remove(struct spi_device *spi) |
| 429 | { |
| 430 | struct ad1938_priv *ad1938 = spi->dev.driver_data; |
| 431 | |
| 432 | ad1938_unregister(ad1938); |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | static struct spi_driver ad1938_spi_driver = { |
| 437 | .driver = { |
| 438 | .name = "ad1938-spi", |
| 439 | .bus = &spi_bus_type, |
| 440 | .owner = THIS_MODULE, |
| 441 | }, |
| 442 | .probe = ad1938_spi_probe, |
| 443 | .remove = __devexit_p(ad1938_spi_remove), |
| 444 | }; |
| 445 | |
| 446 | static struct snd_soc_dai_ops ad1938_dai_ops = { |
| 447 | .hw_params = ad1938_hw_params, |
| 448 | .digital_mute = ad1938_mute, |
| 449 | .set_tdm_slot = ad1938_set_tdm_slot, |
| 450 | .set_fmt = ad1938_set_dai_fmt, |
| 451 | }; |
| 452 | |
| 453 | /* codec DAI instance */ |
| 454 | struct snd_soc_dai ad1938_dai = { |
| 455 | .name = "AD1938", |
| 456 | .playback = { |
| 457 | .stream_name = "Playback", |
| 458 | .channels_min = 2, |
| 459 | .channels_max = 8, |
| 460 | .rates = SNDRV_PCM_RATE_48000, |
| 461 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | |
| 462 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, |
| 463 | }, |
| 464 | .capture = { |
| 465 | .stream_name = "Capture", |
| 466 | .channels_min = 2, |
| 467 | .channels_max = 4, |
| 468 | .rates = SNDRV_PCM_RATE_48000, |
| 469 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | |
| 470 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, |
| 471 | }, |
| 472 | .ops = &ad1938_dai_ops, |
| 473 | }; |
| 474 | EXPORT_SYMBOL_GPL(ad1938_dai); |
| 475 | |
| 476 | static int ad1938_register(struct ad1938_priv *ad1938) |
| 477 | { |
| 478 | int ret; |
| 479 | struct snd_soc_codec *codec = &ad1938->codec; |
| 480 | |
| 481 | if (ad1938_codec) { |
| 482 | dev_err(codec->dev, "Another ad1938 is registered\n"); |
| 483 | return -EINVAL; |
| 484 | } |
| 485 | |
| 486 | mutex_init(&codec->mutex); |
| 487 | INIT_LIST_HEAD(&codec->dapm_widgets); |
| 488 | INIT_LIST_HEAD(&codec->dapm_paths); |
| 489 | codec->private_data = ad1938; |
| 490 | codec->reg_cache = ad1938->reg_cache; |
| 491 | codec->reg_cache_size = AD1938_NUM_REGS; |
| 492 | codec->name = "AD1938"; |
| 493 | codec->owner = THIS_MODULE; |
| 494 | codec->dai = &ad1938_dai; |
| 495 | codec->num_dai = 1; |
| 496 | codec->write = ad1938_write_reg; |
| 497 | codec->read = ad1938_read_reg_cache; |
| 498 | INIT_LIST_HEAD(&codec->dapm_widgets); |
| 499 | INIT_LIST_HEAD(&codec->dapm_paths); |
| 500 | |
| 501 | ad1938_dai.dev = codec->dev; |
| 502 | ad1938_codec = codec; |
| 503 | |
| 504 | /* default setting for ad1938 */ |
| 505 | codec->write(codec, AD1938_DAC_CHNL_MUTE, 0x0); /* unmute dac channels */ |
| 506 | codec->write(codec, AD1938_DAC_CTRL2, 0x1A); /* de-emphasis: 48kHz, powedown dac */ |
| 507 | codec->write(codec, AD1938_DAC_CTRL0, 0x21); /* powerdown dac, dac tdm mode */ |
| 508 | codec->write(codec, AD1938_ADC_CTRL0, 0x3); /* high-pass filter enable */ |
| 509 | codec->write(codec, AD1938_ADC_CTRL1, 0x43); /* sata delay=1, adc aux mode */ |
| 510 | codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9D); /* pll input:mclki/xi */ |
| 511 | codec->write(codec, AD1938_PLL_CLK_CTRL1, 0x04); |
| 512 | |
| 513 | ad1938_fill_cache(codec); |
| 514 | |
| 515 | ret = snd_soc_register_codec(codec); |
| 516 | if (ret != 0) { |
| 517 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); |
| 518 | return ret; |
| 519 | } |
| 520 | |
| 521 | ret = snd_soc_register_dai(&ad1938_dai); |
| 522 | if (ret != 0) { |
| 523 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); |
| 524 | snd_soc_unregister_codec(codec); |
| 525 | return ret; |
| 526 | } |
| 527 | |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | static void ad1938_unregister(struct ad1938_priv *ad1938) |
| 532 | { |
| 533 | ad1938_set_bias_level(&ad1938->codec, SND_SOC_BIAS_OFF); |
| 534 | snd_soc_unregister_dai(&ad1938_dai); |
| 535 | snd_soc_unregister_codec(&ad1938->codec); |
| 536 | kfree(ad1938); |
| 537 | ad1938_codec = NULL; |
| 538 | } |
| 539 | |
| 540 | static int ad1938_probe(struct platform_device *pdev) |
| 541 | { |
| 542 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 543 | struct snd_soc_codec *codec; |
| 544 | int ret = 0; |
| 545 | |
| 546 | if (ad1938_codec == NULL) { |
| 547 | dev_err(&pdev->dev, "Codec device not registered\n"); |
| 548 | return -ENODEV; |
| 549 | } |
| 550 | |
| 551 | socdev->card->codec = ad1938_codec; |
| 552 | codec = ad1938_codec; |
| 553 | |
| 554 | /* register pcms */ |
| 555 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); |
| 556 | if (ret < 0) { |
| 557 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); |
| 558 | goto pcm_err; |
| 559 | } |
| 560 | |
| 561 | snd_soc_add_controls(codec, ad1938_snd_controls, |
| 562 | ARRAY_SIZE(ad1938_snd_controls)); |
| 563 | snd_soc_dapm_new_controls(codec, ad1938_dapm_widgets, |
| 564 | ARRAY_SIZE(ad1938_dapm_widgets)); |
| 565 | snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); |
| 566 | snd_soc_dapm_new_widgets(codec); |
| 567 | |
| 568 | ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
| 569 | |
| 570 | ret = snd_soc_init_card(socdev); |
| 571 | if (ret < 0) { |
| 572 | dev_err(codec->dev, "failed to register card: %d\n", ret); |
| 573 | goto card_err; |
| 574 | } |
| 575 | |
| 576 | return ret; |
| 577 | |
| 578 | card_err: |
| 579 | snd_soc_free_pcms(socdev); |
| 580 | snd_soc_dapm_free(socdev); |
| 581 | pcm_err: |
| 582 | return ret; |
| 583 | } |
| 584 | |
| 585 | /* power down chip */ |
| 586 | static int ad1938_remove(struct platform_device *pdev) |
| 587 | { |
| 588 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 589 | |
| 590 | snd_soc_free_pcms(socdev); |
| 591 | snd_soc_dapm_free(socdev); |
| 592 | |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | #ifdef CONFIG_PM |
| 597 | static int ad1938_suspend(struct platform_device *pdev, |
| 598 | pm_message_t state) |
| 599 | { |
| 600 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 601 | struct snd_soc_codec *codec = socdev->card->codec; |
| 602 | |
| 603 | ad1938_set_bias_level(codec, SND_SOC_BIAS_OFF); |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | static int ad1938_resume(struct platform_device *pdev) |
| 608 | { |
| 609 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 610 | struct snd_soc_codec *codec = socdev->card->codec; |
| 611 | |
| 612 | if (codec->suspend_bias_level == SND_SOC_BIAS_ON) |
| 613 | ad1938_set_bias_level(codec, SND_SOC_BIAS_ON); |
| 614 | |
| 615 | return 0; |
| 616 | } |
| 617 | #else |
| 618 | #define ad1938_suspend NULL |
| 619 | #define ad1938_resume NULL |
| 620 | #endif |
| 621 | |
| 622 | struct snd_soc_codec_device soc_codec_dev_ad1938 = { |
| 623 | .probe = ad1938_probe, |
| 624 | .remove = ad1938_remove, |
| 625 | .suspend = ad1938_suspend, |
| 626 | .resume = ad1938_resume, |
| 627 | }; |
| 628 | EXPORT_SYMBOL_GPL(soc_codec_dev_ad1938); |
| 629 | |
| 630 | static int __init ad1938_init(void) |
| 631 | { |
| 632 | int ret; |
| 633 | |
| 634 | ret = spi_register_driver(&ad1938_spi_driver); |
| 635 | if (ret != 0) { |
| 636 | printk(KERN_ERR "Failed to register ad1938 SPI driver: %d\n", |
| 637 | ret); |
| 638 | } |
| 639 | |
| 640 | return ret; |
| 641 | } |
| 642 | module_init(ad1938_init); |
| 643 | |
| 644 | static void __exit ad1938_exit(void) |
| 645 | { |
| 646 | spi_unregister_driver(&ad1938_spi_driver); |
| 647 | } |
| 648 | module_exit(ad1938_exit); |
| 649 | |
| 650 | MODULE_DESCRIPTION("ASoC ad1938 driver"); |
| 651 | MODULE_AUTHOR("Barry Song "); |
| 652 | MODULE_LICENSE("GPL"); |