sound/soc/codecs/ssm2602.c

   1 /*
   2  * File:         sound/soc/codecs/ssm2602.c
   3  * Author:       Cliff Cai <Cliff.Cai@analog.com>
   4  *
   5  * Created:      Tue June 06 2008
   6  * Description:  Driver for ssm2602 sound chip
   7  *
   8  * Modified:
   9  *               Copyright 2008 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/module.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/init.h>
  32 #include <linux/delay.h>
  33 #include <linux/pm.h>
  34 #include <linux/i2c.h>
  35 #include <linux/platform_device.h>
  36 #include <sound/core.h>
  37 #include <sound/pcm.h>
  38 #include <sound/pcm_params.h>
  39 #include <sound/soc.h>
  40 #include <sound/soc-dapm.h>
  41 #include <sound/initval.h>
  42
  43 #include "ssm2602.h"
  44
  45 #define AUDIO_NAME "ssm2602"
  46 #define SSM2602_VERSION "0.1"
  47
  48 struct snd_soc_codec_device soc_codec_dev_ssm2602;
  49
  50 /* codec private data */
  51 struct ssm2602_priv {
  52         unsigned int sysclk;
  53         struct snd_pcm_substream *master_substream;
  54         struct snd_pcm_substream *slave_substream;
  55 };
  56
  57 /*
  58  * ssm2602 register cache
  59  * We can't read the ssm2602 register space when we are
  60  * using 2 wire for device control, so we cache them instead.
  61  * There is no point in caching the reset register
  62  */
  63 static const u16 ssm2602_reg[SSM2602_CACHEREGNUM] = {
  64         0x0017, 0x0017, 0x0079, 0x0079,
  65         0x0000, 0x0000, 0x0000, 0x000a,
  66         0x0000, 0x0000
  67 };
  68
  69 /*
  70  * read ssm2602 register cache
  71  */
  72 static inline unsigned int ssm2602_read_reg_cache(struct snd_soc_codec *codec,
  73         unsigned int reg)
  74 {
  75         u16 *cache = codec->reg_cache;
  76         if (reg == SSM2602_RESET)
  77                 return 0;
  78         if (reg >= SSM2602_CACHEREGNUM)
  79                 return -1;
  80         return cache[reg];
  81 }
  82
  83 /*
  84  * write ssm2602 register cache
  85  */
  86 static inline void ssm2602_write_reg_cache(struct snd_soc_codec *codec,
  87         u16 reg, unsigned int value)
  88 {
  89         u16 *cache = codec->reg_cache;
  90         if (reg >= SSM2602_CACHEREGNUM)
  91                 return;
  92         cache[reg] = value;
  93 }
  94
  95 /*
  96  * write to the ssm2602 register space
  97  */
  98 static int ssm2602_write(struct snd_soc_codec *codec, unsigned int reg,
  99         unsigned int value)
 100 {
 101         u8 data[2];
 102
 103         /* data is
 104          *   D15..D9 ssm2602 register offset
 105          *   D8...D0 register data
 106          */
 107         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
 108         data[1] = value & 0x00ff;
 109
 110         ssm2602_write_reg_cache(codec, reg, value);
 111         if (codec->hw_write(codec->control_data, data, 2) == 2)
 112                 return 0;
 113         else
 114                 return -EIO;
 115 }
 116
 117 #define ssm2602_reset(c)        ssm2602_write(c, SSM2602_RESET, 0)
 118
 119 /*Appending several "None"s just for OSS mixer use*/
 120 static const char *ssm2602_input_select[] = {
 121         "Line", "Mic", "None", "None", "None",
 122         "None", "None", "None",
 123 };
 124
 125 static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 126
 127 static const struct soc_enum ssm2602_enum[] = {
 128         SOC_ENUM_SINGLE(SSM2602_APANA, 2, 2, ssm2602_input_select),
 129         SOC_ENUM_SINGLE(SSM2602_APDIGI, 1, 4, ssm2602_deemph),
 130 };
 131
 132 static const struct snd_kcontrol_new ssm2602_snd_controls[] = {
 133
 134 SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
 135         0, 127, 0),
 136 SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
 137         7, 1, 0),
 138
 139 SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
 140 SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),
 141
 142 SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
 143 SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
 144
 145 SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
 146
 147 SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
 148 SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
 149
 150 SOC_ENUM("Capture Source", ssm2602_enum[0]),
 151
 152 SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
 153 };
 154
 155 /* add non dapm controls */
 156 static int ssm2602_add_controls(struct snd_soc_codec *codec)
 157 {
 158         int err, i;
 159
 160         for (i = 0; i < ARRAY_SIZE(ssm2602_snd_controls); i++) {
 161                 err = snd_ctl_add(codec->card,
 162                         snd_soc_cnew(&ssm2602_snd_controls[i], codec, NULL));
 163                 if (err < 0)
 164                         return err;
 165         }
 166
 167         return 0;
 168 }
 169
 170 /* Output Mixer */
 171 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
 172 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
 173 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
 174 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
 175 };
 176
 177 /* Input mux */
 178 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
 179 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
 180
 181 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
 182 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
 183         &ssm2602_output_mixer_controls[0],
 184         ARRAY_SIZE(ssm2602_output_mixer_controls)),
 185 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
 186 SND_SOC_DAPM_OUTPUT("LOUT"),
 187 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 188 SND_SOC_DAPM_OUTPUT("ROUT"),
 189 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 190 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
 191 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
 192 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
 193 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
 194 SND_SOC_DAPM_INPUT("MICIN"),
 195 SND_SOC_DAPM_INPUT("RLINEIN"),
 196 SND_SOC_DAPM_INPUT("LLINEIN"),
 197 };
 198
 199 static const struct snd_soc_dapm_route audio_conn[] = {
 200         /* output mixer */
 201         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 202         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 203         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 204
 205         /* outputs */
 206         {"RHPOUT", NULL, "Output Mixer"},
 207         {"ROUT", NULL, "Output Mixer"},
 208         {"LHPOUT", NULL, "Output Mixer"},
 209         {"LOUT", NULL, "Output Mixer"},
 210
 211         /* input mux */
 212         {"Input Mux", "Line", "Line Input"},
 213         {"Input Mux", "Mic", "Mic Bias"},
 214         {"ADC", NULL, "Input Mux"},
 215
 216         /* inputs */
 217         {"Line Input", NULL, "LLINEIN"},
 218         {"Line Input", NULL, "RLINEIN"},
 219         {"Mic Bias", NULL, "MICIN"},
 220 };
 221
 222 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
 223 {
 224         snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
 225                                   ARRAY_SIZE(ssm2602_dapm_widgets));
 226
 227         snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
 228
 229         snd_soc_dapm_new_widgets(codec);
 230         return 0;
 231 }
 232
 233 struct _coeff_div {
 234         u32 mclk;
 235         u32 rate;
 236         u16 fs;
 237         u8 sr:4;
 238         u8 bosr:1;
 239         u8 usb:1;
 240 };
 241
 242 /* codec mclk clock divider coefficients */
 243 static const struct _coeff_div coeff_div[] = {
 244         /* 48k */
 245         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 246         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 247         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 248
 249         /* 32k */
 250         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 251         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 252         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 253
 254         /* 8k */
 255         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 256         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 257         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 258         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 259         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 260
 261         /* 96k */
 262         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 263         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 264         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 265
 266         /* 44.1k */
 267         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 268         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 269         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 270
 271         /* 88.2k */
 272         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 273         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 274         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 275 };
 276
 277 static inline int get_coeff(int mclk, int rate)
 278 {
 279         int i;
 280
 281         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 282                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 283                         return i;
 284         }
 285         return i;
 286 }
 287
 288 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
 289         struct snd_pcm_hw_params *params)
 290 {
 291         u16 srate;
 292         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 293         struct snd_soc_device *socdev = rtd->socdev;
 294         struct snd_soc_codec *codec = socdev->codec;
 295         struct ssm2602_priv *ssm2602 = codec->private_data;
 296         u16 iface = ssm2602_read_reg_cache(codec, SSM2602_IFACE) & 0xfff3;
 297         int i = get_coeff(ssm2602->sysclk, params_rate(params));
 298
 299         /*no match is found*/
 300         if (i == ARRAY_SIZE(coeff_div))
 301                 return -EINVAL;
 302
 303         srate = (coeff_div[i].sr << 2) |
 304                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 305
 306         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 307         ssm2602_write(codec, SSM2602_SRATE, srate);
 308
 309         /* bit size */
 310         switch (params_format(params)) {
 311         case SNDRV_PCM_FORMAT_S16_LE:
 312                 break;
 313         case SNDRV_PCM_FORMAT_S20_3LE:
 314                 iface |= 0x0004;
 315                 break;
 316         case SNDRV_PCM_FORMAT_S24_LE:
 317                 iface |= 0x0008;
 318                 break;
 319         case SNDRV_PCM_FORMAT_S32_LE:
 320                 iface |= 0x000c;
 321                 break;
 322         }
 323         ssm2602_write(codec, SSM2602_IFACE, iface);
 324         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 325         return 0;
 326 }
 327
 328 static int ssm2602_startup(struct snd_pcm_substream *substream)
 329 {
 330         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 331         struct snd_soc_device *socdev = rtd->socdev;
 332         struct snd_soc_codec *codec = socdev->codec;
 333         struct ssm2602_priv *ssm2602 = codec->private_data;
 334         struct snd_pcm_runtime *master_runtime;
 335
 336         /* The DAI has shared clocks so if we already have a playback or
 337          * capture going then constrain this substream to match it.
 338          */
 339         if (ssm2602->master_substream) {
 340                 master_runtime = ssm2602->master_substream->runtime;
 341                 snd_pcm_hw_constraint_minmax(substream->runtime,
 342                                              SNDRV_PCM_HW_PARAM_RATE,
 343                                              master_runtime->rate,
 344                                              master_runtime->rate);
 345
 346                 snd_pcm_hw_constraint_minmax(substream->runtime,
 347                                              SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 348                                              master_runtime->sample_bits,
 349                                              master_runtime->sample_bits);
 350
 351                 ssm2602->slave_substream = substream;
 352         } else
 353                 ssm2602->master_substream = substream;
 354
 355         return 0;
 356 }
 357
 358 static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream)
 359 {
 360         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 361         struct snd_soc_device *socdev = rtd->socdev;
 362         struct snd_soc_codec *codec = socdev->codec;
 363         /* set active */
 364         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 365
 366         return 0;
 367 }
 368
 369 static void ssm2602_shutdown(struct snd_pcm_substream *substream)
 370 {
 371         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 372         struct snd_soc_device *socdev = rtd->socdev;
 373         struct snd_soc_codec *codec = socdev->codec;
 374         /* deactivate */
 375         if (!codec->active)
 376                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 377 }
 378
 379 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
 380 {
 381         struct snd_soc_codec *codec = dai->codec;
 382         u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
 383         if (mute)
 384                 ssm2602_write(codec, SSM2602_APDIGI,
 385                                 mute_reg | APDIGI_ENABLE_DAC_MUTE);
 386         else
 387                 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
 388         return 0;
 389 }
 390
 391 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 392                 int clk_id, unsigned int freq, int dir)
 393 {
 394         struct snd_soc_codec *codec = codec_dai->codec;
 395         struct ssm2602_priv *ssm2602 = codec->private_data;
 396         switch (freq) {
 397         case 11289600:
 398         case 12000000:
 399         case 12288000:
 400         case 16934400:
 401         case 18432000:
 402                 ssm2602->sysclk = freq;
 403                 return 0;
 404         }
 405         return -EINVAL;
 406 }
 407
 408 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
 409                 unsigned int fmt)
 410 {
 411         struct snd_soc_codec *codec = codec_dai->codec;
 412         u16 iface = 0;
 413
 414         /* set master/slave audio interface */
 415         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 416         case SND_SOC_DAIFMT_CBM_CFM:
 417                 iface |= 0x0040;
 418                 break;
 419         case SND_SOC_DAIFMT_CBS_CFS:
 420                 break;
 421         default:
 422                 return -EINVAL;
 423         }
 424
 425         /* interface format */
 426         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 427         case SND_SOC_DAIFMT_I2S:
 428                 iface |= 0x0002;
 429                 break;
 430         case SND_SOC_DAIFMT_RIGHT_J:
 431                 break;
 432         case SND_SOC_DAIFMT_LEFT_J:
 433                 iface |= 0x0001;
 434                 break;
 435         case SND_SOC_DAIFMT_DSP_A:
 436                 iface |= 0x0003;
 437                 break;
 438         case SND_SOC_DAIFMT_DSP_B:
 439                 iface |= 0x0013;
 440                 break;
 441         default:
 442                 return -EINVAL;
 443         }
 444
 445         /* clock inversion */
 446         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 447         case SND_SOC_DAIFMT_NB_NF:
 448                 break;
 449         case SND_SOC_DAIFMT_IB_IF:
 450                 iface |= 0x0090;
 451                 break;
 452         case SND_SOC_DAIFMT_IB_NF:
 453                 iface |= 0x0080;
 454                 break;
 455         case SND_SOC_DAIFMT_NB_IF:
 456                 iface |= 0x0010;
 457                 break;
 458         default:
 459                 return -EINVAL;
 460         }
 461
 462         /* set iface */
 463         ssm2602_write(codec, SSM2602_IFACE, iface);
 464         return 0;
 465 }
 466
 467 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
 468                                  enum snd_soc_bias_level level)
 469 {
 470         u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
 471
 472         switch (level) {
 473         case SND_SOC_BIAS_ON:
 474                 /* vref/mid, osc on, dac unmute */
 475                 ssm2602_write(codec, SSM2602_PWR, reg);
 476                 break;
 477         case SND_SOC_BIAS_PREPARE:
 478                 break;
 479         case SND_SOC_BIAS_STANDBY:
 480                 /* everything off except vref/vmid, */
 481                 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
 482                 break;
 483         case SND_SOC_BIAS_OFF:
 484                 /* everything off, dac mute, inactive */
 485                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 486                 ssm2602_write(codec, SSM2602_PWR, 0xffff);
 487                 break;
 488
 489         }
 490         codec->bias_level = level;
 491         return 0;
 492 }
 493
 494 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 495                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
 496                 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 497                 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 498                 SNDRV_PCM_RATE_96000)
 499
 500 struct snd_soc_dai ssm2602_dai = {
 501         .name = "SSM2602",
 502         .playback = {
 503                 .stream_name = "Playback",
 504                 .channels_min = 2,
 505                 .channels_max = 2,
 506                 .rates = SSM2602_RATES,
 507                 .formats = SNDRV_PCM_FMTBIT_S32_LE,},
 508         .capture = {
 509                 .stream_name = "Capture",
 510                 .channels_min = 2,
 511                 .channels_max = 2,
 512                 .rates = SSM2602_RATES,
 513                 .formats = SNDRV_PCM_FMTBIT_S32_LE,},
 514         .ops = {
 515                 .startup = ssm2602_startup,
 516                 .prepare = ssm2602_pcm_prepare,
 517                 .hw_params = ssm2602_hw_params,
 518                 .shutdown = ssm2602_shutdown,
 519         },
 520         .dai_ops = {
 521                 .digital_mute = ssm2602_mute,
 522                 .set_sysclk = ssm2602_set_dai_sysclk,
 523                 .set_fmt = ssm2602_set_dai_fmt,
 524         }
 525 };
 526 EXPORT_SYMBOL_GPL(ssm2602_dai);
 527
 528 static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
 529 {
 530         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 531         struct snd_soc_codec *codec = socdev->codec;
 532
 533         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 534         return 0;
 535 }
 536
 537 static int ssm2602_resume(struct platform_device *pdev)
 538 {
 539         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 540         struct snd_soc_codec *codec = socdev->codec;
 541         int i;
 542         u8 data[2];
 543         u16 *cache = codec->reg_cache;
 544
 545         /* Sync reg_cache with the hardware */
 546         for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
 547                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 548                 data[1] = cache[i] & 0x00ff;
 549                 codec->hw_write(codec->control_data, data, 2);
 550         }
 551         ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 552         ssm2602_set_bias_level(codec, codec->suspend_bias_level);
 553         return 0;
 554 }
 555
 556 /*
 557  * initialise the ssm2602 driver
 558  * register the mixer and dsp interfaces with the kernel
 559  */
 560 static int ssm2602_init(struct snd_soc_device *socdev)
 561 {
 562         struct snd_soc_codec *codec = socdev->codec;
 563         int reg, ret = 0;
 564
 565         codec->name = "SSM2602";
 566         codec->owner = THIS_MODULE;
 567         codec->read = ssm2602_read_reg_cache;
 568         codec->write = ssm2602_write;
 569         codec->set_bias_level = ssm2602_set_bias_level;
 570         codec->dai = &ssm2602_dai;
 571         codec->num_dai = 1;
 572         codec->reg_cache_size = sizeof(ssm2602_reg);
 573         codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
 574                                         GFP_KERNEL);
 575         if (codec->reg_cache == NULL)
 576                 return -ENOMEM;
 577
 578         ssm2602_reset(codec);
 579
 580         /* register pcms */
 581         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 582         if (ret < 0) {
 583                 pr_err("ssm2602: failed to create pcms\n");
 584                 goto pcm_err;
 585         }
 586         /*power on device*/
 587         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 588         /* set the update bits */
 589         reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
 590         ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
 591         reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
 592         ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
 593         reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
 594         ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
 595         reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
 596         ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
 597         /*select Line in as default input*/
 598         ssm2602_write(codec, SSM2602_APANA,
 599                         APANA_ENABLE_MIC_BOOST2 | APANA_SELECT_DAC |
 600                         APANA_ENABLE_MIC_BOOST);
 601         ssm2602_write(codec, SSM2602_PWR, 0);
 602
 603         ssm2602_add_controls(codec);
 604         ssm2602_add_widgets(codec);
 605         ret = snd_soc_register_card(socdev);
 606         if (ret < 0) {
 607                 pr_err("ssm2602: failed to register card\n");
 608                 goto card_err;
 609         }
 610
 611         return ret;
 612
 613 card_err:
 614         snd_soc_free_pcms(socdev);
 615         snd_soc_dapm_free(socdev);
 616 pcm_err:
 617         kfree(codec->reg_cache);
 618         return ret;
 619 }
 620
 621 static struct snd_soc_device *ssm2602_socdev;
 622
 623 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 624 /*
 625  * ssm2602 2 wire address is determined by GPIO5
 626  * state during powerup.
 627  *    low  = 0x1a
 628  *    high = 0x1b
 629  */
 630 static int ssm2602_i2c_probe(struct i2c_client *i2c,
 631                              const struct i2c_device_id *id)
 632 {
 633         struct snd_soc_device *socdev = ssm2602_socdev;
 634         struct snd_soc_codec *codec = socdev->codec;
 635         int ret;
 636
 637         i2c_set_clientdata(i2c, codec);
 638         codec->control_data = i2c;
 639
 640         ret = ssm2602_init(socdev);
 641         if (ret < 0)
 642                 pr_err("failed to initialise SSM2602\n");
 643
 644         return ret;
 645 }
 646
 647 static int ssm2602_i2c_remove(struct i2c_client *client)
 648 {
 649         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 650         kfree(codec->reg_cache);
 651         return 0;
 652 }
 653
 654 static const struct i2c_device_id ssm2602_i2c_id[] = {
 655         { "ssm2602", 0 },
 656         { }
 657 };
 658 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
 659 /* corgi i2c codec control layer */
 660 static struct i2c_driver ssm2602_i2c_driver = {
 661         .driver = {
 662                 .name = "SSM2602 I2C Codec",
 663                 .owner = THIS_MODULE,
 664         },
 665         .probe = ssm2602_i2c_probe,
 666         .remove = ssm2602_i2c_remove,
 667         .id_table = ssm2602_i2c_id,
 668 };
 669
 670 static int ssm2602_add_i2c_device(struct platform_device *pdev,
 671                                   const struct ssm2602_setup_data *setup)
 672 {
 673         struct i2c_board_info info;
 674         struct i2c_adapter *adapter;
 675         struct i2c_client *client;
 676         int ret;
 677
 678         ret = i2c_add_driver(&ssm2602_i2c_driver);
 679         if (ret != 0) {
 680                 dev_err(&pdev->dev, "can't add i2c driver\n");
 681                 return ret;
 682         }
 683         memset(&info, 0, sizeof(struct i2c_board_info));
 684         info.addr = setup->i2c_address;
 685         strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
 686         adapter = i2c_get_adapter(setup->i2c_bus);
 687         if (!adapter) {
 688                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 689                 setup->i2c_bus);
 690                 goto err_driver;
 691         }
 692         client = i2c_new_device(adapter, &info);
 693         i2c_put_adapter(adapter);
 694         if (!client) {
 695                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 696                 (unsigned int)info.addr);
 697                 goto err_driver;
 698         }
 699         return 0;
 700 err_driver:
 701         i2c_del_driver(&ssm2602_i2c_driver);
 702         return -ENODEV;
 703 }
 704 #endif
 705
 706 static int ssm2602_probe(struct platform_device *pdev)
 707 {
 708         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 709         struct ssm2602_setup_data *setup;
 710         struct snd_soc_codec *codec;
 711         struct ssm2602_priv *ssm2602;
 712         int ret = 0;
 713
 714         pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
 715
 716         setup = socdev->codec_data;
 717         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 718         if (codec == NULL)
 719                 return -ENOMEM;
 720
 721         ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
 722         if (ssm2602 == NULL) {
 723                 kfree(codec);
 724                 return -ENOMEM;
 725         }
 726
 727         codec->private_data = ssm2602;
 728         socdev->codec = codec;
 729         mutex_init(&codec->mutex);
 730         INIT_LIST_HEAD(&codec->dapm_widgets);
 731         INIT_LIST_HEAD(&codec->dapm_paths);
 732
 733         ssm2602_socdev = socdev;
 734 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 735         if (setup->i2c_address) {
 736                 codec->hw_write = (hw_write_t)i2c_master_send;
 737                 ret = ssm2602_add_i2c_device(pdev, setup);
 738         }
 739 #else
 740         /* other interfaces */
 741 #endif
 742         return ret;
 743 }
 744
 745 /* remove everything here */
 746 static int ssm2602_remove(struct platform_device *pdev)
 747 {
 748         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 749         struct snd_soc_codec *codec = socdev->codec;
 750
 751         if (codec->control_data)
 752                 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 753
 754         snd_soc_free_pcms(socdev);
 755         snd_soc_dapm_free(socdev);
 756 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 757         i2c_unregister_device(codec->control_data);
 758         i2c_del_driver(&ssm2602_i2c_driver);
 759 #endif
 760         kfree(codec->private_data);
 761         kfree(codec);
 762
 763         return 0;
 764 }
 765
 766 struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
 767         .probe =        ssm2602_probe,
 768         .remove =       ssm2602_remove,
 769         .suspend =      ssm2602_suspend,
 770         .resume =       ssm2602_resume,
 771 };
 772 EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
 773
 774 MODULE_DESCRIPTION("ASoC ssm2602 driver");
 775 MODULE_AUTHOR("Cliff Cai");
 776 MODULE_LICENSE("GPL");