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/spi/spi.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/slab.h>
  38 #include <sound/core.h>
  39 #include <sound/pcm.h>
  40 #include <sound/pcm_params.h>
  41 #include <sound/soc.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         struct snd_pcm_substream *master_substream;
  53         struct snd_pcm_substream *slave_substream;
  54 };
  55
  56 /*
  57  * ssm2602 register cache
  58  * We can't read the ssm2602 register space when we are
  59  * using 2 wire for device control, so we cache them instead.
  60  * There is no point in caching the reset register
  61  */
  62 static const u16 ssm2602_reg[SSM2602_CACHEREGNUM] = {
  63         0x0017, 0x0017, 0x0079, 0x0079,
  64         0x0000, 0x0000, 0x0000, 0x000a,
  65         0x0000, 0x0000
  66 };
  67
  68 #define ssm2602_reset(c)        snd_soc_write(c, SSM2602_RESET, 0)
  69
  70 /*Appending several "None"s just for OSS mixer use*/
  71 static const char *ssm2602_input_select[] = {
  72         "Line", "Mic", "None", "None", "None",
  73         "None", "None", "None",
  74 };
  75
  76 static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
  77
  78 static const struct soc_enum ssm2602_enum[] = {
  79         SOC_ENUM_SINGLE(SSM2602_APANA, 2, 2, ssm2602_input_select),
  80         SOC_ENUM_SINGLE(SSM2602_APDIGI, 1, 4, ssm2602_deemph),
  81 };
  82
  83 static const struct snd_kcontrol_new ssm2602_snd_controls[] = {
  84
  85 SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
  86         0, 127, 0),
  87 SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
  88         7, 1, 0),
  89
  90 SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
  91 SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),
  92
  93 SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
  94 SOC_SINGLE("Mic Boost2 (+20dB)", SSM2602_APANA, 7, 1, 0),
  95 SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
  96
  97 SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
  98
  99 SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
 100 SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
 101
 102 SOC_ENUM("Capture Source", ssm2602_enum[0]),
 103
 104 SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
 105 };
 106
 107 /* Output Mixer */
 108 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
 109 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
 110 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
 111 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
 112 };
 113
 114 /* Input mux */
 115 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
 116 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
 117
 118 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
 119 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
 120         &ssm2602_output_mixer_controls[0],
 121         ARRAY_SIZE(ssm2602_output_mixer_controls)),
 122 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
 123 SND_SOC_DAPM_OUTPUT("LOUT"),
 124 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 125 SND_SOC_DAPM_OUTPUT("ROUT"),
 126 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 127 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
 128 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
 129 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
 130 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
 131 SND_SOC_DAPM_INPUT("MICIN"),
 132 SND_SOC_DAPM_INPUT("RLINEIN"),
 133 SND_SOC_DAPM_INPUT("LLINEIN"),
 134 };
 135
 136 static const struct snd_soc_dapm_route audio_conn[] = {
 137         /* output mixer */
 138         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 139         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 140         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 141
 142         /* outputs */
 143         {"RHPOUT", NULL, "Output Mixer"},
 144         {"ROUT", NULL, "Output Mixer"},
 145         {"LHPOUT", NULL, "Output Mixer"},
 146         {"LOUT", NULL, "Output Mixer"},
 147
 148         /* input mux */
 149         {"Input Mux", "Line", "Line Input"},
 150         {"Input Mux", "Mic", "Mic Bias"},
 151         {"ADC", NULL, "Input Mux"},
 152
 153         /* inputs */
 154         {"Line Input", NULL, "LLINEIN"},
 155         {"Line Input", NULL, "RLINEIN"},
 156         {"Mic Bias", NULL, "MICIN"},
 157 };
 158
 159 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
 160 {
 161         struct snd_soc_dapm_context *dapm = &codec->dapm;
 162
 163         snd_soc_dapm_new_controls(dapm, ssm2602_dapm_widgets,
 164                                   ARRAY_SIZE(ssm2602_dapm_widgets));
 165         snd_soc_dapm_add_routes(dapm, audio_conn, ARRAY_SIZE(audio_conn));
 166
 167         return 0;
 168 }
 169
 170 struct _coeff_div {
 171         u32 mclk;
 172         u32 rate;
 173         u16 fs;
 174         u8 sr:4;
 175         u8 bosr:1;
 176         u8 usb:1;
 177 };
 178
 179 /* codec mclk clock divider coefficients */
 180 static const struct _coeff_div coeff_div[] = {
 181         /* 48k */
 182         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 183         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 184         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 185
 186         /* 32k */
 187         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 188         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 189         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 190
 191         /* 8k */
 192         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 193         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 194         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 195         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 196         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 197
 198         /* 96k */
 199         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 200         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 201         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 202
 203         /* 44.1k */
 204         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 205         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 206         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 207
 208         /* 88.2k */
 209         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 210         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 211         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 212 };
 213
 214 static inline int get_coeff(int mclk, int rate)
 215 {
 216         int i;
 217
 218         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 219                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 220                         return i;
 221         }
 222         return i;
 223 }
 224
 225 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
 226         struct snd_pcm_hw_params *params,
 227         struct snd_soc_dai *dai)
 228 {
 229         u16 srate;
 230         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 231         struct snd_soc_codec *codec = rtd->codec;
 232         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 233         u16 iface = snd_soc_read(codec, SSM2602_IFACE) & 0xfff3;
 234         int i = get_coeff(ssm2602->sysclk, params_rate(params));
 235
 236         if (substream == ssm2602->slave_substream) {
 237                 dev_dbg(codec->dev, "Ignoring hw_params for slave substream\n");
 238                 return 0;
 239         }
 240
 241         /*no match is found*/
 242         if (i == ARRAY_SIZE(coeff_div))
 243                 return -EINVAL;
 244
 245         srate = (coeff_div[i].sr << 2) |
 246                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 247
 248         snd_soc_write(codec, SSM2602_ACTIVE, 0);
 249         snd_soc_write(codec, SSM2602_SRATE, srate);
 250
 251         /* bit size */
 252         switch (params_format(params)) {
 253         case SNDRV_PCM_FORMAT_S16_LE:
 254                 break;
 255         case SNDRV_PCM_FORMAT_S20_3LE:
 256                 iface |= 0x0004;
 257                 break;
 258         case SNDRV_PCM_FORMAT_S24_LE:
 259                 iface |= 0x0008;
 260                 break;
 261         case SNDRV_PCM_FORMAT_S32_LE:
 262                 iface |= 0x000c;
 263                 break;
 264         }
 265         snd_soc_write(codec, SSM2602_IFACE, iface);
 266         snd_soc_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 267         return 0;
 268 }
 269
 270 static int ssm2602_startup(struct snd_pcm_substream *substream,
 271                            struct snd_soc_dai *dai)
 272 {
 273         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 274         struct snd_soc_codec *codec = rtd->codec;
 275         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 276         struct i2c_client *i2c = codec->control_data;
 277         struct snd_pcm_runtime *master_runtime;
 278
 279         /* The DAI has shared clocks so if we already have a playback or
 280          * capture going then constrain this substream to match it.
 281          * TODO: the ssm2602 allows pairs of non-matching PB/REC rates
 282          */
 283         if (ssm2602->master_substream) {
 284                 master_runtime = ssm2602->master_substream->runtime;
 285                 dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
 286                         master_runtime->sample_bits,
 287                         master_runtime->rate);
 288
 289                 if (master_runtime->rate != 0)
 290                         snd_pcm_hw_constraint_minmax(substream->runtime,
 291                                                      SNDRV_PCM_HW_PARAM_RATE,
 292                                                      master_runtime->rate,
 293                                                      master_runtime->rate);
 294
 295                 if (master_runtime->sample_bits != 0)
 296                         snd_pcm_hw_constraint_minmax(substream->runtime,
 297                                                      SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 298                                                      master_runtime->sample_bits,
 299                                                      master_runtime->sample_bits);
 300
 301                 ssm2602->slave_substream = substream;
 302         } else
 303                 ssm2602->master_substream = substream;
 304
 305         return 0;
 306 }
 307
 308 static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream,
 309                                struct snd_soc_dai *dai)
 310 {
 311         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 312         struct snd_soc_codec *codec = rtd->codec;
 313         /* set active */
 314         snd_soc_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 315
 316         return 0;
 317 }
 318
 319 static void ssm2602_shutdown(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
 326         /* deactivate */
 327         if (!codec->active)
 328                 snd_soc_write(codec, SSM2602_ACTIVE, 0);
 329
 330         if (ssm2602->master_substream == substream)
 331                 ssm2602->master_substream = ssm2602->slave_substream;
 332
 333         ssm2602->slave_substream = NULL;
 334 }
 335
 336 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
 337 {
 338         struct snd_soc_codec *codec = dai->codec;
 339         u16 mute_reg = snd_soc_read(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
 340         if (mute)
 341                 snd_soc_write(codec, SSM2602_APDIGI,
 342                                 mute_reg | APDIGI_ENABLE_DAC_MUTE);
 343         else
 344                 snd_soc_write(codec, SSM2602_APDIGI, mute_reg);
 345         return 0;
 346 }
 347
 348 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 349                 int clk_id, unsigned int freq, int dir)
 350 {
 351         struct snd_soc_codec *codec = codec_dai->codec;
 352         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 353         switch (freq) {
 354         case 11289600:
 355         case 12000000:
 356         case 12288000:
 357         case 16934400:
 358         case 18432000:
 359                 ssm2602->sysclk = freq;
 360                 return 0;
 361         }
 362         return -EINVAL;
 363 }
 364
 365 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
 366                 unsigned int fmt)
 367 {
 368         struct snd_soc_codec *codec = codec_dai->codec;
 369         u16 iface = 0;
 370
 371         /* set master/slave audio interface */
 372         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 373         case SND_SOC_DAIFMT_CBM_CFM:
 374                 iface |= 0x0040;
 375                 break;
 376         case SND_SOC_DAIFMT_CBS_CFS:
 377                 break;
 378         default:
 379                 return -EINVAL;
 380         }
 381
 382         /* interface format */
 383         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 384         case SND_SOC_DAIFMT_I2S:
 385                 iface |= 0x0002;
 386                 break;
 387         case SND_SOC_DAIFMT_RIGHT_J:
 388                 break;
 389         case SND_SOC_DAIFMT_LEFT_J:
 390                 iface |= 0x0001;
 391                 break;
 392         case SND_SOC_DAIFMT_DSP_A:
 393                 iface |= 0x0013;
 394                 break;
 395         case SND_SOC_DAIFMT_DSP_B:
 396                 iface |= 0x0003;
 397                 break;
 398         default:
 399                 return -EINVAL;
 400         }
 401
 402         /* clock inversion */
 403         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 404         case SND_SOC_DAIFMT_NB_NF:
 405                 break;
 406         case SND_SOC_DAIFMT_IB_IF:
 407                 iface |= 0x0090;
 408                 break;
 409         case SND_SOC_DAIFMT_IB_NF:
 410                 iface |= 0x0080;
 411                 break;
 412         case SND_SOC_DAIFMT_NB_IF:
 413                 iface |= 0x0010;
 414                 break;
 415         default:
 416                 return -EINVAL;
 417         }
 418
 419         /* set iface */
 420         snd_soc_write(codec, SSM2602_IFACE, iface);
 421         return 0;
 422 }
 423
 424 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
 425                                  enum snd_soc_bias_level level)
 426 {
 427         u16 reg = snd_soc_read(codec, SSM2602_PWR) & 0xff7f;
 428
 429         switch (level) {
 430         case SND_SOC_BIAS_ON:
 431                 /* vref/mid, osc on, dac unmute */
 432                 snd_soc_write(codec, SSM2602_PWR, reg);
 433                 break;
 434         case SND_SOC_BIAS_PREPARE:
 435                 break;
 436         case SND_SOC_BIAS_STANDBY:
 437                 /* everything off except vref/vmid, */
 438                 snd_soc_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
 439                 break;
 440         case SND_SOC_BIAS_OFF:
 441                 /* everything off, dac mute, inactive */
 442                 snd_soc_write(codec, SSM2602_ACTIVE, 0);
 443                 snd_soc_write(codec, SSM2602_PWR, 0xffff);
 444                 break;
 445
 446         }
 447         codec->dapm.bias_level = level;
 448         return 0;
 449 }
 450
 451 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_32000 |\
 452                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 453                 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 454
 455 #define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 456                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 457
 458 static struct snd_soc_dai_ops ssm2602_dai_ops = {
 459         .startup        = ssm2602_startup,
 460         .prepare        = ssm2602_pcm_prepare,
 461         .hw_params      = ssm2602_hw_params,
 462         .shutdown       = ssm2602_shutdown,
 463         .digital_mute   = ssm2602_mute,
 464         .set_sysclk     = ssm2602_set_dai_sysclk,
 465         .set_fmt        = ssm2602_set_dai_fmt,
 466 };
 467
 468 static struct snd_soc_dai_driver ssm2602_dai = {
 469         .name = "ssm2602-hifi",
 470         .playback = {
 471                 .stream_name = "Playback",
 472                 .channels_min = 2,
 473                 .channels_max = 2,
 474                 .rates = SSM2602_RATES,
 475                 .formats = SSM2602_FORMATS,},
 476         .capture = {
 477                 .stream_name = "Capture",
 478                 .channels_min = 2,
 479                 .channels_max = 2,
 480                 .rates = SSM2602_RATES,
 481                 .formats = SSM2602_FORMATS,},
 482         .ops = &ssm2602_dai_ops,
 483 };
 484
 485 static int ssm2602_suspend(struct snd_soc_codec *codec, pm_message_t state)
 486 {
 487         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 488         return 0;
 489 }
 490
 491 static int ssm2602_resume(struct snd_soc_codec *codec)
 492 {
 493         snd_soc_cache_sync(codec);
 494
 495         ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 496
 497         return 0;
 498 }
 499
 500 static int ssm2602_probe(struct snd_soc_codec *codec)
 501 {
 502         struct ssm2602_priv *ssm2602 = snd_soc_codec_get_drvdata(codec);
 503         int ret = 0, reg;
 504
 505         pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
 506
 507         ret = snd_soc_codec_set_cache_io(codec, 7, 9, ssm2602->control_type);
 508         if (ret < 0) {
 509                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 510                 return ret;
 511         }
 512
 513         ret = ssm2602_reset(codec);
 514         if (ret < 0) {
 515                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 516                 return ret;
 517         }
 518
 519         /*power on device*/
 520         snd_soc_write(codec, SSM2602_ACTIVE, 0);
 521         /* set the update bits */
 522         reg = snd_soc_read(codec, SSM2602_LINVOL);
 523         snd_soc_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
 524         reg = snd_soc_read(codec, SSM2602_RINVOL);
 525         snd_soc_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
 526         reg = snd_soc_read(codec, SSM2602_LOUT1V);
 527         snd_soc_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
 528         reg = snd_soc_read(codec, SSM2602_ROUT1V);
 529         snd_soc_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
 530         /*select Line in as default input*/
 531         snd_soc_write(codec, SSM2602_APANA, APANA_SELECT_DAC |
 532                         APANA_ENABLE_MIC_BOOST);
 533         snd_soc_write(codec, SSM2602_PWR, 0);
 534
 535         snd_soc_add_controls(codec, ssm2602_snd_controls,
 536                                 ARRAY_SIZE(ssm2602_snd_controls));
 537         ssm2602_add_widgets(codec);
 538
 539         return 0;
 540 }
 541
 542 /* remove everything here */
 543 static int ssm2602_remove(struct snd_soc_codec *codec)
 544 {
 545         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 546         return 0;
 547 }
 548
 549 static struct snd_soc_codec_driver soc_codec_dev_ssm2602 = {
 550         .probe =        ssm2602_probe,
 551         .remove =       ssm2602_remove,
 552         .suspend =      ssm2602_suspend,
 553         .resume =       ssm2602_resume,
 554         .set_bias_level = ssm2602_set_bias_level,
 555         .reg_cache_size = sizeof(ssm2602_reg),
 556         .reg_word_size = sizeof(u16),
 557         .reg_cache_default = ssm2602_reg,
 558 };
 559
 560 #if defined(CONFIG_SPI_MASTER)
 561 static int __devinit ssm2602_spi_probe(struct spi_device *spi)
 562 {
 563         struct ssm2602_priv *ssm2602;
 564         int ret;
 565
 566         ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
 567         if (ssm2602 == NULL)
 568                 return -ENOMEM;
 569
 570         spi_set_drvdata(spi, ssm2602);
 571         ssm2602->control_type = SND_SOC_SPI;
 572
 573         ret = snd_soc_register_codec(&spi->dev,
 574                         &soc_codec_dev_ssm2602, &ssm2602_dai, 1);
 575         if (ret < 0)
 576                 kfree(ssm2602);
 577         return ret;
 578 }
 579
 580 static int __devexit ssm2602_spi_remove(struct spi_device *spi)
 581 {
 582         snd_soc_unregister_codec(&spi->dev);
 583         kfree(spi_get_drvdata(spi));
 584         return 0;
 585 }
 586
 587 static struct spi_driver ssm2602_spi_driver = {
 588         .driver = {
 589                 .name   = "ssm2602",
 590                 .owner  = THIS_MODULE,
 591         },
 592         .probe          = ssm2602_spi_probe,
 593         .remove         = __devexit_p(ssm2602_spi_remove),
 594 };
 595 #endif
 596
 597 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 598 /*
 599  * ssm2602 2 wire address is determined by GPIO5
 600  * state during powerup.
 601  *    low  = 0x1a
 602  *    high = 0x1b
 603  */
 604 static int ssm2602_i2c_probe(struct i2c_client *i2c,
 605                              const struct i2c_device_id *id)
 606 {
 607         struct ssm2602_priv *ssm2602;
 608         int ret;
 609
 610         ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
 611         if (ssm2602 == NULL)
 612                 return -ENOMEM;
 613
 614         i2c_set_clientdata(i2c, ssm2602);
 615         ssm2602->control_type = SND_SOC_I2C;
 616
 617         ret = snd_soc_register_codec(&i2c->dev,
 618                         &soc_codec_dev_ssm2602, &ssm2602_dai, 1);
 619         if (ret < 0)
 620                 kfree(ssm2602);
 621         return ret;
 622 }
 623
 624 static int ssm2602_i2c_remove(struct i2c_client *client)
 625 {
 626         snd_soc_unregister_codec(&client->dev);
 627         kfree(i2c_get_clientdata(client));
 628         return 0;
 629 }
 630
 631 static const struct i2c_device_id ssm2602_i2c_id[] = {
 632         { "ssm2602", 0 },
 633         { }
 634 };
 635 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
 636
 637 /* corgi i2c codec control layer */
 638 static struct i2c_driver ssm2602_i2c_driver = {
 639         .driver = {
 640                 .name = "ssm2602",
 641                 .owner = THIS_MODULE,
 642         },
 643         .probe = ssm2602_i2c_probe,
 644         .remove = ssm2602_i2c_remove,
 645         .id_table = ssm2602_i2c_id,
 646 };
 647 #endif
 648
 649
 650 static int __init ssm2602_modinit(void)
 651 {
 652         int ret = 0;
 653
 654 #if defined(CONFIG_SPI_MASTER)
 655         ret = spi_register_driver(&ssm2602_spi_driver);
 656         if (ret)
 657                 return ret;
 658 #endif
 659
 660 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 661         ret = i2c_add_driver(&ssm2602_i2c_driver);
 662         if (ret)
 663                 return ret;
 664 #endif
 665
 666         return ret;
 667 }
 668 module_init(ssm2602_modinit);
 669
 670 static void __exit ssm2602_exit(void)
 671 {
 672 #if defined(CONFIG_SPI_MASTER)
 673         spi_unregister_driver(&ssm2602_spi_driver);
 674 #endif
 675
 676 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 677         i2c_del_driver(&ssm2602_i2c_driver);
 678 #endif
 679 }
 680 module_exit(ssm2602_exit);
 681
 682 MODULE_DESCRIPTION("ASoC ssm2602 driver");
 683 MODULE_AUTHOR("Cliff Cai");
 684 MODULE_LICENSE("GPL");