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 <linux/slab.h>
  37 #include <sound/core.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include <sound/soc.h>
  41 #include <sound/soc-dapm.h>
  42 #include <sound/initval.h>
  43
  44 #include "ssm2602.h"
  45
  46 #define SSM2602_VERSION "0.1"
  47
  48 /* codec private data */
  49 struct ssm2602_priv {
  50         unsigned int sysclk;
  51         enum snd_soc_control_type control_type;
  52         void *control_data;
  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 Boost2 (+20dB)", SSM2602_APANA, 7, 1, 0),
 144 SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
 145
 146 SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
 147
 148 SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
 149 SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
 150
 151 SOC_ENUM("Capture Source", ssm2602_enum[0]),
 152
 153 SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
 154 };
 155
 156 /* Output Mixer */
 157 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
 158 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
 159 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
 160 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
 161 };
 162
 163 /* Input mux */
 164 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
 165 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
 166
 167 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
 168 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
 169         &ssm2602_output_mixer_controls[0],
 170         ARRAY_SIZE(ssm2602_output_mixer_controls)),
 171 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
 172 SND_SOC_DAPM_OUTPUT("LOUT"),
 173 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 174 SND_SOC_DAPM_OUTPUT("ROUT"),
 175 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 176 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
 177 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
 178 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
 179 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
 180 SND_SOC_DAPM_INPUT("MICIN"),
 181 SND_SOC_DAPM_INPUT("RLINEIN"),
 182 SND_SOC_DAPM_INPUT("LLINEIN"),
 183 };
 184
 185 static const struct snd_soc_dapm_route audio_conn[] = {
 186         /* output mixer */
 187         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 188         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 189         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 190
 191         /* outputs */
 192         {"RHPOUT", NULL, "Output Mixer"},
 193         {"ROUT", NULL, "Output Mixer"},
 194         {"LHPOUT", NULL, "Output Mixer"},
 195         {"LOUT", NULL, "Output Mixer"},
 196
 197         /* input mux */
 198         {"Input Mux", "Line", "Line Input"},
 199         {"Input Mux", "Mic", "Mic Bias"},
 200         {"ADC", NULL, "Input Mux"},
 201
 202         /* inputs */
 203         {"Line Input", NULL, "LLINEIN"},
 204         {"Line Input", NULL, "RLINEIN"},
 205         {"Mic Bias", NULL, "MICIN"},
 206 };
 207
 208 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
 209 {
 210         snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
 211                                   ARRAY_SIZE(ssm2602_dapm_widgets));
 212
 213         snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
 214
 215         return 0;
 216 }
 217
 218 struct _coeff_div {
 219         u32 mclk;
 220         u32 rate;
 221         u16 fs;
 222         u8 sr:4;
 223         u8 bosr:1;
 224         u8 usb:1;
 225 };
 226
 227 /* codec mclk clock divider coefficients */
 228 static const struct _coeff_div coeff_div[] = {
 229         /* 48k */
 230         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 231         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 232         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 233
 234         /* 32k */
 235         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 236         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 237         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 238
 239         /* 8k */
 240         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 241         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 242         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 243         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 244         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 245
 246         /* 96k */
 247         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 248         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 249         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 250
 251         /* 44.1k */
 252         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 253         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 254         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 255
 256         /* 88.2k */
 257         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 258         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 259         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 260 };
 261
 262 static inline int get_coeff(int mclk, int rate)
 263 {
 264         int i;
 265
 266         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 267                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 268                         return i;
 269         }
 270         return i;
 271 }
 272
 273 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
 274         struct snd_pcm_hw_params *params,
 275         struct snd_soc_dai *dai)
 276 {
 277         u16 srate;
 278         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 279         struct snd_soc_codec *codec = rtd->codec;
 280         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 281         struct i2c_client *i2c = codec->control_data;
 282         u16 iface = ssm2602_read_reg_cache(codec, SSM2602_IFACE) & 0xfff3;
 283         int i = get_coeff(ssm2602->sysclk, params_rate(params));
 284
 285         if (substream == ssm2602->slave_substream) {
 286                 dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
 287                 return 0;
 288         }
 289
 290         /*no match is found*/
 291         if (i == ARRAY_SIZE(coeff_div))
 292                 return -EINVAL;
 293
 294         srate = (coeff_div[i].sr << 2) |
 295                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 296
 297         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 298         ssm2602_write(codec, SSM2602_SRATE, srate);
 299
 300         /* bit size */
 301         switch (params_format(params)) {
 302         case SNDRV_PCM_FORMAT_S16_LE:
 303                 break;
 304         case SNDRV_PCM_FORMAT_S20_3LE:
 305                 iface |= 0x0004;
 306                 break;
 307         case SNDRV_PCM_FORMAT_S24_LE:
 308                 iface |= 0x0008;
 309                 break;
 310         case SNDRV_PCM_FORMAT_S32_LE:
 311                 iface |= 0x000c;
 312                 break;
 313         }
 314         ssm2602_write(codec, SSM2602_IFACE, iface);
 315         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 316         return 0;
 317 }
 318
 319 static int ssm2602_startup(struct snd_pcm_substream *substream,
 320                            struct snd_soc_dai *dai)
 321 {
 322         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 323         struct snd_soc_codec *codec = rtd->codec;
 324         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 325         struct i2c_client *i2c = codec->control_data;
 326         struct snd_pcm_runtime *master_runtime;
 327
 328         /* The DAI has shared clocks so if we already have a playback or
 329          * capture going then constrain this substream to match it.
 330          * TODO: the ssm2602 allows pairs of non-matching PB/REC rates
 331          */
 332         if (ssm2602->master_substream) {
 333                 master_runtime = ssm2602->master_substream->runtime;
 334                 dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
 335                         master_runtime->sample_bits,
 336                         master_runtime->rate);
 337
 338                 if (master_runtime->rate != 0)
 339                         snd_pcm_hw_constraint_minmax(substream->runtime,
 340                                                      SNDRV_PCM_HW_PARAM_RATE,
 341                                                      master_runtime->rate,
 342                                                      master_runtime->rate);
 343
 344                 if (master_runtime->sample_bits != 0)
 345                         snd_pcm_hw_constraint_minmax(substream->runtime,
 346                                                      SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 347                                                      master_runtime->sample_bits,
 348                                                      master_runtime->sample_bits);
 349
 350                 ssm2602->slave_substream = substream;
 351         } else
 352                 ssm2602->master_substream = substream;
 353
 354         return 0;
 355 }
 356
 357 static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream,
 358                                struct snd_soc_dai *dai)
 359 {
 360         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 361         struct snd_soc_codec *codec = rtd->codec;
 362         /* set active */
 363         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 364
 365         return 0;
 366 }
 367
 368 static void ssm2602_shutdown(struct snd_pcm_substream *substream,
 369                              struct snd_soc_dai *dai)
 370 {
 371         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 372         struct snd_soc_codec *codec = rtd->codec;
 373         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 374
 375         /* deactivate */
 376         if (!codec->active)
 377                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 378
 379         if (ssm2602->master_substream == substream)
 380                 ssm2602->master_substream = ssm2602->slave_substream;
 381
 382         ssm2602->slave_substream = NULL;
 383 }
 384
 385 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
 386 {
 387         struct snd_soc_codec *codec = dai->codec;
 388         u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
 389         if (mute)
 390                 ssm2602_write(codec, SSM2602_APDIGI,
 391                                 mute_reg | APDIGI_ENABLE_DAC_MUTE);
 392         else
 393                 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
 394         return 0;
 395 }
 396
 397 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 398                 int clk_id, unsigned int freq, int dir)
 399 {
 400         struct snd_soc_codec *codec = codec_dai->codec;
 401         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 402         switch (freq) {
 403         case 11289600:
 404         case 12000000:
 405         case 12288000:
 406         case 16934400:
 407         case 18432000:
 408                 ssm2602->sysclk = freq;
 409                 return 0;
 410         }
 411         return -EINVAL;
 412 }
 413
 414 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
 415                 unsigned int fmt)
 416 {
 417         struct snd_soc_codec *codec = codec_dai->codec;
 418         u16 iface = 0;
 419
 420         /* set master/slave audio interface */
 421         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 422         case SND_SOC_DAIFMT_CBM_CFM:
 423                 iface |= 0x0040;
 424                 break;
 425         case SND_SOC_DAIFMT_CBS_CFS:
 426                 break;
 427         default:
 428                 return -EINVAL;
 429         }
 430
 431         /* interface format */
 432         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 433         case SND_SOC_DAIFMT_I2S:
 434                 iface |= 0x0002;
 435                 break;
 436         case SND_SOC_DAIFMT_RIGHT_J:
 437                 break;
 438         case SND_SOC_DAIFMT_LEFT_J:
 439                 iface |= 0x0001;
 440                 break;
 441         case SND_SOC_DAIFMT_DSP_A:
 442                 iface |= 0x0013;
 443                 break;
 444         case SND_SOC_DAIFMT_DSP_B:
 445                 iface |= 0x0003;
 446                 break;
 447         default:
 448                 return -EINVAL;
 449         }
 450
 451         /* clock inversion */
 452         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 453         case SND_SOC_DAIFMT_NB_NF:
 454                 break;
 455         case SND_SOC_DAIFMT_IB_IF:
 456                 iface |= 0x0090;
 457                 break;
 458         case SND_SOC_DAIFMT_IB_NF:
 459                 iface |= 0x0080;
 460                 break;
 461         case SND_SOC_DAIFMT_NB_IF:
 462                 iface |= 0x0010;
 463                 break;
 464         default:
 465                 return -EINVAL;
 466         }
 467
 468         /* set iface */
 469         ssm2602_write(codec, SSM2602_IFACE, iface);
 470         return 0;
 471 }
 472
 473 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
 474                                  enum snd_soc_bias_level level)
 475 {
 476         u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
 477
 478         switch (level) {
 479         case SND_SOC_BIAS_ON:
 480                 /* vref/mid, osc on, dac unmute */
 481                 ssm2602_write(codec, SSM2602_PWR, reg);
 482                 break;
 483         case SND_SOC_BIAS_PREPARE:
 484                 break;
 485         case SND_SOC_BIAS_STANDBY:
 486                 /* everything off except vref/vmid, */
 487                 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
 488                 break;
 489         case SND_SOC_BIAS_OFF:
 490                 /* everything off, dac mute, inactive */
 491                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 492                 ssm2602_write(codec, SSM2602_PWR, 0xffff);
 493                 break;
 494
 495         }
 496         codec->bias_level = level;
 497         return 0;
 498 }
 499
 500 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_32000 |\
 501                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 502                 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 503
 504 #define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 505                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 506
 507 static struct snd_soc_dai_ops ssm2602_dai_ops = {
 508         .startup        = ssm2602_startup,
 509         .prepare        = ssm2602_pcm_prepare,
 510         .hw_params      = ssm2602_hw_params,
 511         .shutdown       = ssm2602_shutdown,
 512         .digital_mute   = ssm2602_mute,
 513         .set_sysclk     = ssm2602_set_dai_sysclk,
 514         .set_fmt        = ssm2602_set_dai_fmt,
 515 };
 516
 517 static struct snd_soc_dai_driver ssm2602_dai = {
 518         .name = "ssm2602-hifi",
 519         .playback = {
 520                 .stream_name = "Playback",
 521                 .channels_min = 2,
 522                 .channels_max = 2,
 523                 .rates = SSM2602_RATES,
 524                 .formats = SSM2602_FORMATS,},
 525         .capture = {
 526                 .stream_name = "Capture",
 527                 .channels_min = 2,
 528                 .channels_max = 2,
 529                 .rates = SSM2602_RATES,
 530                 .formats = SSM2602_FORMATS,},
 531         .ops = &ssm2602_dai_ops,
 532 };
 533
 534 static int ssm2602_suspend(struct snd_soc_codec *codec, pm_message_t state)
 535 {
 536         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 537         return 0;
 538 }
 539
 540 static int ssm2602_resume(struct snd_soc_codec *codec)
 541 {
 542         int i;
 543         u8 data[2];
 544         u16 *cache = codec->reg_cache;
 545
 546         /* Sync reg_cache with the hardware */
 547         for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
 548                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 549                 data[1] = cache[i] & 0x00ff;
 550                 codec->hw_write(codec->control_data, data, 2);
 551         }
 552         ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 553         return 0;
 554 }
 555
 556 static int ssm2602_probe(struct snd_soc_codec *codec)
 557 {
 558         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 559         int ret = 0, reg;
 560
 561         pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
 562
 563         codec->bias_level = SND_SOC_BIAS_OFF,
 564         codec->control_data = ssm2602->control_data;
 565
 566         ssm2602_reset(codec);
 567
 568         /*power on device*/
 569         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 570         /* set the update bits */
 571         reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
 572         ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
 573         reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
 574         ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
 575         reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
 576         ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
 577         reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
 578         ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
 579         /*select Line in as default input*/
 580         ssm2602_write(codec, SSM2602_APANA, APANA_SELECT_DAC |
 581                         APANA_ENABLE_MIC_BOOST);
 582         ssm2602_write(codec, SSM2602_PWR, 0);
 583
 584         snd_soc_add_controls(codec, ssm2602_snd_controls,
 585                                 ARRAY_SIZE(ssm2602_snd_controls));
 586         ssm2602_add_widgets(codec);
 587
 588         return ret;
 589 }
 590
 591 /* remove everything here */
 592 static int ssm2602_remove(struct snd_soc_codec *codec)
 593 {
 594         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 595         return 0;
 596 }
 597
 598 static struct snd_soc_codec_driver soc_codec_dev_ssm2602 = {
 599         .probe =        ssm2602_probe,
 600         .remove =       ssm2602_remove,
 601         .suspend =      ssm2602_suspend,
 602         .resume =       ssm2602_resume,
 603         .read = ssm2602_read_reg_cache,
 604         .write = ssm2602_write,
 605         .set_bias_level = ssm2602_set_bias_level,
 606         .reg_cache_size = sizeof(ssm2602_reg),
 607         .reg_word_size = sizeof(u16),
 608         .reg_cache_default = ssm2602_reg,
 609 };
 610
 611 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 612 /*
 613  * ssm2602 2 wire address is determined by GPIO5
 614  * state during powerup.
 615  *    low  = 0x1a
 616  *    high = 0x1b
 617  */
 618 static int ssm2602_i2c_probe(struct i2c_client *i2c,
 619                              const struct i2c_device_id *id)
 620 {
 621         struct ssm2602_priv *ssm2602;
 622         int ret;
 623
 624         ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
 625         if (ssm2602 == NULL)
 626                 return -ENOMEM;
 627
 628         i2c_set_clientdata(i2c, ssm2602);
 629         ssm2602->control_data = i2c;
 630         ssm2602->control_type = SND_SOC_I2C;
 631
 632         ret = snd_soc_register_codec(&i2c->dev,
 633                         &soc_codec_dev_ssm2602, &ssm2602_dai, 1);
 634         if (ret < 0)
 635                 kfree(ssm2602);
 636         return ret;
 637 }
 638
 639 static int ssm2602_i2c_remove(struct i2c_client *client)
 640 {
 641         snd_soc_unregister_codec(&client->dev);
 642         kfree(i2c_get_clientdata(client));
 643         return 0;
 644 }
 645
 646 static const struct i2c_device_id ssm2602_i2c_id[] = {
 647         { "ssm2602", 0 },
 648         { }
 649 };
 650 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
 651
 652 /* corgi i2c codec control layer */
 653 static struct i2c_driver ssm2602_i2c_driver = {
 654         .driver = {
 655                 .name = "ssm2602-codec",
 656                 .owner = THIS_MODULE,
 657         },
 658         .probe = ssm2602_i2c_probe,
 659         .remove = ssm2602_i2c_remove,
 660         .id_table = ssm2602_i2c_id,
 661 };
 662 #endif
 663
 664
 665 static int __init ssm2602_modinit(void)
 666 {
 667         int ret = 0;
 668 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 669         ret = i2c_add_driver(&ssm2602_i2c_driver);
 670         if (ret != 0) {
 671                 printk(KERN_ERR "Failed to register SSM2602 I2C driver: %d\n",
 672                        ret);
 673         }
 674 #endif
 675         return ret;
 676 }
 677 module_init(ssm2602_modinit);
 678
 679 static void __exit ssm2602_exit(void)
 680 {
 681 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 682         i2c_del_driver(&ssm2602_i2c_driver);
 683 #endif
 684 }
 685 module_exit(ssm2602_exit);
 686
 687 MODULE_DESCRIPTION("ASoC ssm2602 driver");
 688 MODULE_AUTHOR("Cliff Cai");
 689 MODULE_LICENSE("GPL");