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 SSM2602_VERSION "0.1"
  46
  47 struct snd_soc_codec_device soc_codec_dev_ssm2602;
  48
  49 /* codec private data */
  50 struct ssm2602_priv {
  51         unsigned int sysclk;
  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 /*
  69  * read ssm2602 register cache
  70  */
  71 static inline unsigned int ssm2602_read_reg_cache(struct snd_soc_codec *codec,
  72         unsigned int reg)
  73 {
  74         u16 *cache = codec->reg_cache;
  75         if (reg == SSM2602_RESET)
  76                 return 0;
  77         if (reg >= SSM2602_CACHEREGNUM)
  78                 return -1;
  79         return cache[reg];
  80 }
  81
  82 /*
  83  * write ssm2602 register cache
  84  */
  85 static inline void ssm2602_write_reg_cache(struct snd_soc_codec *codec,
  86         u16 reg, unsigned int value)
  87 {
  88         u16 *cache = codec->reg_cache;
  89         if (reg >= SSM2602_CACHEREGNUM)
  90                 return;
  91         cache[reg] = value;
  92 }
  93
  94 /*
  95  * write to the ssm2602 register space
  96  */
  97 static int ssm2602_write(struct snd_soc_codec *codec, unsigned int reg,
  98         unsigned int value)
  99 {
 100         u8 data[2];
 101
 102         /* data is
 103          *   D15..D9 ssm2602 register offset
 104          *   D8...D0 register data
 105          */
 106         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
 107         data[1] = value & 0x00ff;
 108
 109         ssm2602_write_reg_cache(codec, reg, value);
 110         if (codec->hw_write(codec->control_data, data, 2) == 2)
 111                 return 0;
 112         else
 113                 return -EIO;
 114 }
 115
 116 #define ssm2602_reset(c)        ssm2602_write(c, SSM2602_RESET, 0)
 117
 118 /*Appending several "None"s just for OSS mixer use*/
 119 static const char *ssm2602_input_select[] = {
 120         "Line", "Mic", "None", "None", "None",
 121         "None", "None", "None",
 122 };
 123
 124 static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 125
 126 static const struct soc_enum ssm2602_enum[] = {
 127         SOC_ENUM_SINGLE(SSM2602_APANA, 2, 2, ssm2602_input_select),
 128         SOC_ENUM_SINGLE(SSM2602_APDIGI, 1, 4, ssm2602_deemph),
 129 };
 130
 131 static const struct snd_kcontrol_new ssm2602_snd_controls[] = {
 132
 133 SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
 134         0, 127, 0),
 135 SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
 136         7, 1, 0),
 137
 138 SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
 139 SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),
 140
 141 SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
 142 SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
 143
 144 SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
 145
 146 SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
 147 SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
 148
 149 SOC_ENUM("Capture Source", ssm2602_enum[0]),
 150
 151 SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
 152 };
 153
 154 /* Output Mixer */
 155 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
 156 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
 157 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
 158 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
 159 };
 160
 161 /* Input mux */
 162 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
 163 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
 164
 165 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
 166 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
 167         &ssm2602_output_mixer_controls[0],
 168         ARRAY_SIZE(ssm2602_output_mixer_controls)),
 169 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
 170 SND_SOC_DAPM_OUTPUT("LOUT"),
 171 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 172 SND_SOC_DAPM_OUTPUT("ROUT"),
 173 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 174 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
 175 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
 176 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
 177 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
 178 SND_SOC_DAPM_INPUT("MICIN"),
 179 SND_SOC_DAPM_INPUT("RLINEIN"),
 180 SND_SOC_DAPM_INPUT("LLINEIN"),
 181 };
 182
 183 static const struct snd_soc_dapm_route audio_conn[] = {
 184         /* output mixer */
 185         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 186         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 187         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 188
 189         /* outputs */
 190         {"RHPOUT", NULL, "Output Mixer"},
 191         {"ROUT", NULL, "Output Mixer"},
 192         {"LHPOUT", NULL, "Output Mixer"},
 193         {"LOUT", NULL, "Output Mixer"},
 194
 195         /* input mux */
 196         {"Input Mux", "Line", "Line Input"},
 197         {"Input Mux", "Mic", "Mic Bias"},
 198         {"ADC", NULL, "Input Mux"},
 199
 200         /* inputs */
 201         {"Line Input", NULL, "LLINEIN"},
 202         {"Line Input", NULL, "RLINEIN"},
 203         {"Mic Bias", NULL, "MICIN"},
 204 };
 205
 206 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
 207 {
 208         snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
 209                                   ARRAY_SIZE(ssm2602_dapm_widgets));
 210
 211         snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
 212
 213         return 0;
 214 }
 215
 216 struct _coeff_div {
 217         u32 mclk;
 218         u32 rate;
 219         u16 fs;
 220         u8 sr:4;
 221         u8 bosr:1;
 222         u8 usb:1;
 223 };
 224
 225 /* codec mclk clock divider coefficients */
 226 static const struct _coeff_div coeff_div[] = {
 227         /* 48k */
 228         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 229         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 230         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 231
 232         /* 32k */
 233         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 234         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 235         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 236
 237         /* 8k */
 238         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 239         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 240         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 241         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 242         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 243
 244         /* 96k */
 245         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 246         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 247         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 248
 249         /* 44.1k */
 250         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 251         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 252         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 253
 254         /* 88.2k */
 255         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 256         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 257         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 258 };
 259
 260 static inline int get_coeff(int mclk, int rate)
 261 {
 262         int i;
 263
 264         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 265                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 266                         return i;
 267         }
 268         return i;
 269 }
 270
 271 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
 272         struct snd_pcm_hw_params *params,
 273         struct snd_soc_dai *dai)
 274 {
 275         u16 srate;
 276         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 277         struct snd_soc_device *socdev = rtd->socdev;
 278         struct snd_soc_codec *codec = socdev->card->codec;
 279         struct ssm2602_priv *ssm2602 = codec->private_data;
 280         struct i2c_client *i2c = codec->control_data;
 281         u16 iface = ssm2602_read_reg_cache(codec, SSM2602_IFACE) & 0xfff3;
 282         int i = get_coeff(ssm2602->sysclk, params_rate(params));
 283
 284         if (substream == ssm2602->slave_substream) {
 285                 dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
 286                 return 0;
 287         }
 288
 289         /*no match is found*/
 290         if (i == ARRAY_SIZE(coeff_div))
 291                 return -EINVAL;
 292
 293         srate = (coeff_div[i].sr << 2) |
 294                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 295
 296         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 297         ssm2602_write(codec, SSM2602_SRATE, srate);
 298
 299         /* bit size */
 300         switch (params_format(params)) {
 301         case SNDRV_PCM_FORMAT_S16_LE:
 302                 break;
 303         case SNDRV_PCM_FORMAT_S20_3LE:
 304                 iface |= 0x0004;
 305                 break;
 306         case SNDRV_PCM_FORMAT_S24_LE:
 307                 iface |= 0x0008;
 308                 break;
 309         case SNDRV_PCM_FORMAT_S32_LE:
 310                 iface |= 0x000c;
 311                 break;
 312         }
 313         ssm2602_write(codec, SSM2602_IFACE, iface);
 314         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 315         return 0;
 316 }
 317
 318 static int ssm2602_startup(struct snd_pcm_substream *substream,
 319                            struct snd_soc_dai *dai)
 320 {
 321         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 322         struct snd_soc_device *socdev = rtd->socdev;
 323         struct snd_soc_codec *codec = socdev->card->codec;
 324         struct ssm2602_priv *ssm2602 = codec->private_data;
 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_device *socdev = rtd->socdev;
 362         struct snd_soc_codec *codec = socdev->card->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                              struct snd_soc_dai *dai)
 371 {
 372         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 373         struct snd_soc_device *socdev = rtd->socdev;
 374         struct snd_soc_codec *codec = socdev->card->codec;
 375         struct ssm2602_priv *ssm2602 = codec->private_data;
 376
 377         /* deactivate */
 378         if (!codec->active)
 379                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 380
 381         if (ssm2602->master_substream == substream)
 382                 ssm2602->master_substream = ssm2602->slave_substream;
 383
 384         ssm2602->slave_substream = NULL;
 385 }
 386
 387 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
 388 {
 389         struct snd_soc_codec *codec = dai->codec;
 390         u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
 391         if (mute)
 392                 ssm2602_write(codec, SSM2602_APDIGI,
 393                                 mute_reg | APDIGI_ENABLE_DAC_MUTE);
 394         else
 395                 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
 396         return 0;
 397 }
 398
 399 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 400                 int clk_id, unsigned int freq, int dir)
 401 {
 402         struct snd_soc_codec *codec = codec_dai->codec;
 403         struct ssm2602_priv *ssm2602 = codec->private_data;
 404         switch (freq) {
 405         case 11289600:
 406         case 12000000:
 407         case 12288000:
 408         case 16934400:
 409         case 18432000:
 410                 ssm2602->sysclk = freq;
 411                 return 0;
 412         }
 413         return -EINVAL;
 414 }
 415
 416 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
 417                 unsigned int fmt)
 418 {
 419         struct snd_soc_codec *codec = codec_dai->codec;
 420         u16 iface = 0;
 421
 422         /* set master/slave audio interface */
 423         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 424         case SND_SOC_DAIFMT_CBM_CFM:
 425                 iface |= 0x0040;
 426                 break;
 427         case SND_SOC_DAIFMT_CBS_CFS:
 428                 break;
 429         default:
 430                 return -EINVAL;
 431         }
 432
 433         /* interface format */
 434         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 435         case SND_SOC_DAIFMT_I2S:
 436                 iface |= 0x0002;
 437                 break;
 438         case SND_SOC_DAIFMT_RIGHT_J:
 439                 break;
 440         case SND_SOC_DAIFMT_LEFT_J:
 441                 iface |= 0x0001;
 442                 break;
 443         case SND_SOC_DAIFMT_DSP_A:
 444                 iface |= 0x0013;
 445                 break;
 446         case SND_SOC_DAIFMT_DSP_B:
 447                 iface |= 0x0003;
 448                 break;
 449         default:
 450                 return -EINVAL;
 451         }
 452
 453         /* clock inversion */
 454         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 455         case SND_SOC_DAIFMT_NB_NF:
 456                 break;
 457         case SND_SOC_DAIFMT_IB_IF:
 458                 iface |= 0x0090;
 459                 break;
 460         case SND_SOC_DAIFMT_IB_NF:
 461                 iface |= 0x0080;
 462                 break;
 463         case SND_SOC_DAIFMT_NB_IF:
 464                 iface |= 0x0010;
 465                 break;
 466         default:
 467                 return -EINVAL;
 468         }
 469
 470         /* set iface */
 471         ssm2602_write(codec, SSM2602_IFACE, iface);
 472         return 0;
 473 }
 474
 475 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
 476                                  enum snd_soc_bias_level level)
 477 {
 478         u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
 479
 480         switch (level) {
 481         case SND_SOC_BIAS_ON:
 482                 /* vref/mid, osc on, dac unmute */
 483                 ssm2602_write(codec, SSM2602_PWR, reg);
 484                 break;
 485         case SND_SOC_BIAS_PREPARE:
 486                 break;
 487         case SND_SOC_BIAS_STANDBY:
 488                 /* everything off except vref/vmid, */
 489                 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
 490                 break;
 491         case SND_SOC_BIAS_OFF:
 492                 /* everything off, dac mute, inactive */
 493                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 494                 ssm2602_write(codec, SSM2602_PWR, 0xffff);
 495                 break;
 496
 497         }
 498         codec->bias_level = level;
 499         return 0;
 500 }
 501
 502 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_32000 |\
 503                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 504                 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 505
 506 #define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 507                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 508
 509 static struct snd_soc_dai_ops ssm2602_dai_ops = {
 510         .startup        = ssm2602_startup,
 511         .prepare        = ssm2602_pcm_prepare,
 512         .hw_params      = ssm2602_hw_params,
 513         .shutdown       = ssm2602_shutdown,
 514         .digital_mute   = ssm2602_mute,
 515         .set_sysclk     = ssm2602_set_dai_sysclk,
 516         .set_fmt        = ssm2602_set_dai_fmt,
 517 };
 518
 519 struct snd_soc_dai ssm2602_dai = {
 520         .name = "SSM2602",
 521         .playback = {
 522                 .stream_name = "Playback",
 523                 .channels_min = 2,
 524                 .channels_max = 2,
 525                 .rates = SSM2602_RATES,
 526                 .formats = SSM2602_FORMATS,},
 527         .capture = {
 528                 .stream_name = "Capture",
 529                 .channels_min = 2,
 530                 .channels_max = 2,
 531                 .rates = SSM2602_RATES,
 532                 .formats = SSM2602_FORMATS,},
 533         .ops = &ssm2602_dai_ops,
 534 };
 535 EXPORT_SYMBOL_GPL(ssm2602_dai);
 536
 537 static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
 538 {
 539         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 540         struct snd_soc_codec *codec = socdev->card->codec;
 541
 542         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 543         return 0;
 544 }
 545
 546 static int ssm2602_resume(struct platform_device *pdev)
 547 {
 548         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 549         struct snd_soc_codec *codec = socdev->card->codec;
 550         int i;
 551         u8 data[2];
 552         u16 *cache = codec->reg_cache;
 553
 554         /* Sync reg_cache with the hardware */
 555         for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
 556                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 557                 data[1] = cache[i] & 0x00ff;
 558                 codec->hw_write(codec->control_data, data, 2);
 559         }
 560         ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 561         ssm2602_set_bias_level(codec, codec->suspend_bias_level);
 562         return 0;
 563 }
 564
 565 /*
 566  * initialise the ssm2602 driver
 567  * register the mixer and dsp interfaces with the kernel
 568  */
 569 static int ssm2602_init(struct snd_soc_device *socdev)
 570 {
 571         struct snd_soc_codec *codec = socdev->card->codec;
 572         int reg, ret = 0;
 573
 574         codec->name = "SSM2602";
 575         codec->owner = THIS_MODULE;
 576         codec->read = ssm2602_read_reg_cache;
 577         codec->write = ssm2602_write;
 578         codec->set_bias_level = ssm2602_set_bias_level;
 579         codec->dai = &ssm2602_dai;
 580         codec->num_dai = 1;
 581         codec->reg_cache_size = sizeof(ssm2602_reg);
 582         codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
 583                                         GFP_KERNEL);
 584         if (codec->reg_cache == NULL)
 585                 return -ENOMEM;
 586
 587         ssm2602_reset(codec);
 588
 589         /* register pcms */
 590         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 591         if (ret < 0) {
 592                 pr_err("ssm2602: failed to create pcms\n");
 593                 goto pcm_err;
 594         }
 595         /*power on device*/
 596         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 597         /* set the update bits */
 598         reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
 599         ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
 600         reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
 601         ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
 602         reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
 603         ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
 604         reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
 605         ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
 606         /*select Line in as default input*/
 607         ssm2602_write(codec, SSM2602_APANA,
 608                         APANA_ENABLE_MIC_BOOST2 | APANA_SELECT_DAC |
 609                         APANA_ENABLE_MIC_BOOST);
 610         ssm2602_write(codec, SSM2602_PWR, 0);
 611
 612         snd_soc_add_controls(codec, ssm2602_snd_controls,
 613                                 ARRAY_SIZE(ssm2602_snd_controls));
 614         ssm2602_add_widgets(codec);
 615
 616         return ret;
 617
 618 pcm_err:
 619         kfree(codec->reg_cache);
 620         return ret;
 621 }
 622
 623 static struct snd_soc_device *ssm2602_socdev;
 624
 625 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 626 /*
 627  * ssm2602 2 wire address is determined by GPIO5
 628  * state during powerup.
 629  *    low  = 0x1a
 630  *    high = 0x1b
 631  */
 632 static int ssm2602_i2c_probe(struct i2c_client *i2c,
 633                              const struct i2c_device_id *id)
 634 {
 635         struct snd_soc_device *socdev = ssm2602_socdev;
 636         struct snd_soc_codec *codec = socdev->card->codec;
 637         int ret;
 638
 639         i2c_set_clientdata(i2c, codec);
 640         codec->control_data = i2c;
 641
 642         ret = ssm2602_init(socdev);
 643         if (ret < 0)
 644                 pr_err("failed to initialise SSM2602\n");
 645
 646         return ret;
 647 }
 648
 649 static int ssm2602_i2c_remove(struct i2c_client *client)
 650 {
 651         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 652         kfree(codec->reg_cache);
 653         return 0;
 654 }
 655
 656 static const struct i2c_device_id ssm2602_i2c_id[] = {
 657         { "ssm2602", 0 },
 658         { }
 659 };
 660 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
 661 /* corgi i2c codec control layer */
 662 static struct i2c_driver ssm2602_i2c_driver = {
 663         .driver = {
 664                 .name = "SSM2602 I2C Codec",
 665                 .owner = THIS_MODULE,
 666         },
 667         .probe = ssm2602_i2c_probe,
 668         .remove = ssm2602_i2c_remove,
 669         .id_table = ssm2602_i2c_id,
 670 };
 671
 672 static int ssm2602_add_i2c_device(struct platform_device *pdev,
 673                                   const struct ssm2602_setup_data *setup)
 674 {
 675         struct i2c_board_info info;
 676         struct i2c_adapter *adapter;
 677         struct i2c_client *client;
 678         int ret;
 679
 680         ret = i2c_add_driver(&ssm2602_i2c_driver);
 681         if (ret != 0) {
 682                 dev_err(&pdev->dev, "can't add i2c driver\n");
 683                 return ret;
 684         }
 685         memset(&info, 0, sizeof(struct i2c_board_info));
 686         info.addr = setup->i2c_address;
 687         strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
 688         adapter = i2c_get_adapter(setup->i2c_bus);
 689         if (!adapter) {
 690                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 691                 setup->i2c_bus);
 692                 goto err_driver;
 693         }
 694         client = i2c_new_device(adapter, &info);
 695         i2c_put_adapter(adapter);
 696         if (!client) {
 697                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 698                 (unsigned int)info.addr);
 699                 goto err_driver;
 700         }
 701         return 0;
 702 err_driver:
 703         i2c_del_driver(&ssm2602_i2c_driver);
 704         return -ENODEV;
 705 }
 706 #endif
 707
 708 static int ssm2602_probe(struct platform_device *pdev)
 709 {
 710         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 711         struct ssm2602_setup_data *setup;
 712         struct snd_soc_codec *codec;
 713         struct ssm2602_priv *ssm2602;
 714         int ret = 0;
 715
 716         pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
 717
 718         setup = socdev->codec_data;
 719         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 720         if (codec == NULL)
 721                 return -ENOMEM;
 722
 723         ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
 724         if (ssm2602 == NULL) {
 725                 kfree(codec);
 726                 return -ENOMEM;
 727         }
 728
 729         codec->private_data = ssm2602;
 730         socdev->card->codec = codec;
 731         mutex_init(&codec->mutex);
 732         INIT_LIST_HEAD(&codec->dapm_widgets);
 733         INIT_LIST_HEAD(&codec->dapm_paths);
 734
 735         ssm2602_socdev = socdev;
 736 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 737         if (setup->i2c_address) {
 738                 codec->hw_write = (hw_write_t)i2c_master_send;
 739                 ret = ssm2602_add_i2c_device(pdev, setup);
 740         }
 741 #else
 742         /* other interfaces */
 743 #endif
 744         return ret;
 745 }
 746
 747 /* remove everything here */
 748 static int ssm2602_remove(struct platform_device *pdev)
 749 {
 750         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 751         struct snd_soc_codec *codec = socdev->card->codec;
 752
 753         if (codec->control_data)
 754                 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 755
 756         snd_soc_free_pcms(socdev);
 757         snd_soc_dapm_free(socdev);
 758 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 759         i2c_unregister_device(codec->control_data);
 760         i2c_del_driver(&ssm2602_i2c_driver);
 761 #endif
 762         kfree(codec->private_data);
 763         kfree(codec);
 764
 765         return 0;
 766 }
 767
 768 struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
 769         .probe =        ssm2602_probe,
 770         .remove =       ssm2602_remove,
 771         .suspend =      ssm2602_suspend,
 772         .resume =       ssm2602_resume,
 773 };
 774 EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
 775
 776 static int __init ssm2602_modinit(void)
 777 {
 778         return snd_soc_register_dai(&ssm2602_dai);
 779 }
 780 module_init(ssm2602_modinit);
 781
 782 static void __exit ssm2602_exit(void)
 783 {
 784         snd_soc_unregister_dai(&ssm2602_dai);
 785 }
 786 module_exit(ssm2602_exit);
 787
 788 MODULE_DESCRIPTION("ASoC ssm2602 driver");
 789 MODULE_AUTHOR("Cliff Cai");
 790 MODULE_LICENSE("GPL");