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 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 /* Output Mixer */
 156 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
 157 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
 158 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
 159 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
 160 };
 161
 162 /* Input mux */
 163 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
 164 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
 165
 166 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
 167 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
 168         &ssm2602_output_mixer_controls[0],
 169         ARRAY_SIZE(ssm2602_output_mixer_controls)),
 170 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
 171 SND_SOC_DAPM_OUTPUT("LOUT"),
 172 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 173 SND_SOC_DAPM_OUTPUT("ROUT"),
 174 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 175 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
 176 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
 177 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
 178 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
 179 SND_SOC_DAPM_INPUT("MICIN"),
 180 SND_SOC_DAPM_INPUT("RLINEIN"),
 181 SND_SOC_DAPM_INPUT("LLINEIN"),
 182 };
 183
 184 static const struct snd_soc_dapm_route audio_conn[] = {
 185         /* output mixer */
 186         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 187         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 188         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 189
 190         /* outputs */
 191         {"RHPOUT", NULL, "Output Mixer"},
 192         {"ROUT", NULL, "Output Mixer"},
 193         {"LHPOUT", NULL, "Output Mixer"},
 194         {"LOUT", NULL, "Output Mixer"},
 195
 196         /* input mux */
 197         {"Input Mux", "Line", "Line Input"},
 198         {"Input Mux", "Mic", "Mic Bias"},
 199         {"ADC", NULL, "Input Mux"},
 200
 201         /* inputs */
 202         {"Line Input", NULL, "LLINEIN"},
 203         {"Line Input", NULL, "RLINEIN"},
 204         {"Mic Bias", NULL, "MICIN"},
 205 };
 206
 207 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
 208 {
 209         snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
 210                                   ARRAY_SIZE(ssm2602_dapm_widgets));
 211
 212         snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
 213
 214         return 0;
 215 }
 216
 217 struct _coeff_div {
 218         u32 mclk;
 219         u32 rate;
 220         u16 fs;
 221         u8 sr:4;
 222         u8 bosr:1;
 223         u8 usb:1;
 224 };
 225
 226 /* codec mclk clock divider coefficients */
 227 static const struct _coeff_div coeff_div[] = {
 228         /* 48k */
 229         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 230         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 231         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 232
 233         /* 32k */
 234         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 235         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 236         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 237
 238         /* 8k */
 239         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 240         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 241         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 242         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 243         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 244
 245         /* 96k */
 246         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 247         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 248         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 249
 250         /* 44.1k */
 251         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 252         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 253         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 254
 255         /* 88.2k */
 256         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 257         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 258         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 259 };
 260
 261 static inline int get_coeff(int mclk, int rate)
 262 {
 263         int i;
 264
 265         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 266                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 267                         return i;
 268         }
 269         return i;
 270 }
 271
 272 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
 273         struct snd_pcm_hw_params *params,
 274         struct snd_soc_dai *dai)
 275 {
 276         u16 srate;
 277         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 278         struct snd_soc_device *socdev = rtd->socdev;
 279         struct snd_soc_codec *codec = socdev->card->codec;
 280         struct ssm2602_priv *ssm2602 = codec->private_data;
 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_device *socdev = rtd->socdev;
 324         struct snd_soc_codec *codec = socdev->card->codec;
 325         struct ssm2602_priv *ssm2602 = codec->private_data;
 326         struct i2c_client *i2c = codec->control_data;
 327         struct snd_pcm_runtime *master_runtime;
 328
 329         /* The DAI has shared clocks so if we already have a playback or
 330          * capture going then constrain this substream to match it.
 331          * TODO: the ssm2602 allows pairs of non-matching PB/REC rates
 332          */
 333         if (ssm2602->master_substream) {
 334                 master_runtime = ssm2602->master_substream->runtime;
 335                 dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
 336                         master_runtime->sample_bits,
 337                         master_runtime->rate);
 338
 339                 if (master_runtime->rate != 0)
 340                         snd_pcm_hw_constraint_minmax(substream->runtime,
 341                                                      SNDRV_PCM_HW_PARAM_RATE,
 342                                                      master_runtime->rate,
 343                                                      master_runtime->rate);
 344
 345                 if (master_runtime->sample_bits != 0)
 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                                struct snd_soc_dai *dai)
 360 {
 361         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 362         struct snd_soc_device *socdev = rtd->socdev;
 363         struct snd_soc_codec *codec = socdev->card->codec;
 364         /* set active */
 365         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 366
 367         return 0;
 368 }
 369
 370 static void ssm2602_shutdown(struct snd_pcm_substream *substream,
 371                              struct snd_soc_dai *dai)
 372 {
 373         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 374         struct snd_soc_device *socdev = rtd->socdev;
 375         struct snd_soc_codec *codec = socdev->card->codec;
 376         struct ssm2602_priv *ssm2602 = codec->private_data;
 377
 378         /* deactivate */
 379         if (!codec->active)
 380                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 381
 382         if (ssm2602->master_substream == substream)
 383                 ssm2602->master_substream = ssm2602->slave_substream;
 384
 385         ssm2602->slave_substream = NULL;
 386 }
 387
 388 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
 389 {
 390         struct snd_soc_codec *codec = dai->codec;
 391         u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
 392         if (mute)
 393                 ssm2602_write(codec, SSM2602_APDIGI,
 394                                 mute_reg | APDIGI_ENABLE_DAC_MUTE);
 395         else
 396                 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
 397         return 0;
 398 }
 399
 400 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 401                 int clk_id, unsigned int freq, int dir)
 402 {
 403         struct snd_soc_codec *codec = codec_dai->codec;
 404         struct ssm2602_priv *ssm2602 = codec->private_data;
 405         switch (freq) {
 406         case 11289600:
 407         case 12000000:
 408         case 12288000:
 409         case 16934400:
 410         case 18432000:
 411                 ssm2602->sysclk = freq;
 412                 return 0;
 413         }
 414         return -EINVAL;
 415 }
 416
 417 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
 418                 unsigned int fmt)
 419 {
 420         struct snd_soc_codec *codec = codec_dai->codec;
 421         u16 iface = 0;
 422
 423         /* set master/slave audio interface */
 424         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 425         case SND_SOC_DAIFMT_CBM_CFM:
 426                 iface |= 0x0040;
 427                 break;
 428         case SND_SOC_DAIFMT_CBS_CFS:
 429                 break;
 430         default:
 431                 return -EINVAL;
 432         }
 433
 434         /* interface format */
 435         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 436         case SND_SOC_DAIFMT_I2S:
 437                 iface |= 0x0002;
 438                 break;
 439         case SND_SOC_DAIFMT_RIGHT_J:
 440                 break;
 441         case SND_SOC_DAIFMT_LEFT_J:
 442                 iface |= 0x0001;
 443                 break;
 444         case SND_SOC_DAIFMT_DSP_A:
 445                 iface |= 0x0013;
 446                 break;
 447         case SND_SOC_DAIFMT_DSP_B:
 448                 iface |= 0x0003;
 449                 break;
 450         default:
 451                 return -EINVAL;
 452         }
 453
 454         /* clock inversion */
 455         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 456         case SND_SOC_DAIFMT_NB_NF:
 457                 break;
 458         case SND_SOC_DAIFMT_IB_IF:
 459                 iface |= 0x0090;
 460                 break;
 461         case SND_SOC_DAIFMT_IB_NF:
 462                 iface |= 0x0080;
 463                 break;
 464         case SND_SOC_DAIFMT_NB_IF:
 465                 iface |= 0x0010;
 466                 break;
 467         default:
 468                 return -EINVAL;
 469         }
 470
 471         /* set iface */
 472         ssm2602_write(codec, SSM2602_IFACE, iface);
 473         return 0;
 474 }
 475
 476 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
 477                                  enum snd_soc_bias_level level)
 478 {
 479         u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
 480
 481         switch (level) {
 482         case SND_SOC_BIAS_ON:
 483                 /* vref/mid, osc on, dac unmute */
 484                 ssm2602_write(codec, SSM2602_PWR, reg);
 485                 break;
 486         case SND_SOC_BIAS_PREPARE:
 487                 break;
 488         case SND_SOC_BIAS_STANDBY:
 489                 /* everything off except vref/vmid, */
 490                 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
 491                 break;
 492         case SND_SOC_BIAS_OFF:
 493                 /* everything off, dac mute, inactive */
 494                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 495                 ssm2602_write(codec, SSM2602_PWR, 0xffff);
 496                 break;
 497
 498         }
 499         codec->bias_level = level;
 500         return 0;
 501 }
 502
 503 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_32000 |\
 504                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 505                 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 506
 507 #define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 508                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 509
 510 static struct snd_soc_dai_ops ssm2602_dai_ops = {
 511         .startup        = ssm2602_startup,
 512         .prepare        = ssm2602_pcm_prepare,
 513         .hw_params      = ssm2602_hw_params,
 514         .shutdown       = ssm2602_shutdown,
 515         .digital_mute   = ssm2602_mute,
 516         .set_sysclk     = ssm2602_set_dai_sysclk,
 517         .set_fmt        = ssm2602_set_dai_fmt,
 518 };
 519
 520 struct snd_soc_dai ssm2602_dai = {
 521         .name = "SSM2602",
 522         .playback = {
 523                 .stream_name = "Playback",
 524                 .channels_min = 2,
 525                 .channels_max = 2,
 526                 .rates = SSM2602_RATES,
 527                 .formats = SSM2602_FORMATS,},
 528         .capture = {
 529                 .stream_name = "Capture",
 530                 .channels_min = 2,
 531                 .channels_max = 2,
 532                 .rates = SSM2602_RATES,
 533                 .formats = SSM2602_FORMATS,},
 534         .ops = &ssm2602_dai_ops,
 535 };
 536 EXPORT_SYMBOL_GPL(ssm2602_dai);
 537
 538 static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
 539 {
 540         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 541         struct snd_soc_codec *codec = socdev->card->codec;
 542
 543         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 544         return 0;
 545 }
 546
 547 static int ssm2602_resume(struct platform_device *pdev)
 548 {
 549         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 550         struct snd_soc_codec *codec = socdev->card->codec;
 551         int i;
 552         u8 data[2];
 553         u16 *cache = codec->reg_cache;
 554
 555         /* Sync reg_cache with the hardware */
 556         for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
 557                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 558                 data[1] = cache[i] & 0x00ff;
 559                 codec->hw_write(codec->control_data, data, 2);
 560         }
 561         ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 562         ssm2602_set_bias_level(codec, codec->suspend_bias_level);
 563         return 0;
 564 }
 565
 566 /*
 567  * initialise the ssm2602 driver
 568  * register the mixer and dsp interfaces with the kernel
 569  */
 570 static int ssm2602_init(struct snd_soc_device *socdev)
 571 {
 572         struct snd_soc_codec *codec = socdev->card->codec;
 573         int reg, ret = 0;
 574
 575         codec->name = "SSM2602";
 576         codec->owner = THIS_MODULE;
 577         codec->read = ssm2602_read_reg_cache;
 578         codec->write = ssm2602_write;
 579         codec->set_bias_level = ssm2602_set_bias_level;
 580         codec->dai = &ssm2602_dai;
 581         codec->num_dai = 1;
 582         codec->reg_cache_size = sizeof(ssm2602_reg);
 583         codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
 584                                         GFP_KERNEL);
 585         if (codec->reg_cache == NULL)
 586                 return -ENOMEM;
 587
 588         ssm2602_reset(codec);
 589
 590         /* register pcms */
 591         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 592         if (ret < 0) {
 593                 pr_err("ssm2602: failed to create pcms\n");
 594                 goto pcm_err;
 595         }
 596         /*power on device*/
 597         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 598         /* set the update bits */
 599         reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
 600         ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
 601         reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
 602         ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
 603         reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
 604         ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
 605         reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
 606         ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
 607         /*select Line in as default input*/
 608         ssm2602_write(codec, SSM2602_APANA,
 609                         APANA_ENABLE_MIC_BOOST2 | APANA_SELECT_DAC |
 610                         APANA_ENABLE_MIC_BOOST);
 611         ssm2602_write(codec, SSM2602_PWR, 0);
 612
 613         snd_soc_add_controls(codec, ssm2602_snd_controls,
 614                                 ARRAY_SIZE(ssm2602_snd_controls));
 615         ssm2602_add_widgets(codec);
 616
 617         return ret;
 618
 619 pcm_err:
 620         kfree(codec->reg_cache);
 621         return ret;
 622 }
 623
 624 static struct snd_soc_device *ssm2602_socdev;
 625
 626 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 627 /*
 628  * ssm2602 2 wire address is determined by GPIO5
 629  * state during powerup.
 630  *    low  = 0x1a
 631  *    high = 0x1b
 632  */
 633 static int ssm2602_i2c_probe(struct i2c_client *i2c,
 634                              const struct i2c_device_id *id)
 635 {
 636         struct snd_soc_device *socdev = ssm2602_socdev;
 637         struct snd_soc_codec *codec = socdev->card->codec;
 638         int ret;
 639
 640         i2c_set_clientdata(i2c, codec);
 641         codec->control_data = i2c;
 642
 643         ret = ssm2602_init(socdev);
 644         if (ret < 0)
 645                 pr_err("failed to initialise SSM2602\n");
 646
 647         return ret;
 648 }
 649
 650 static int ssm2602_i2c_remove(struct i2c_client *client)
 651 {
 652         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 653         kfree(codec->reg_cache);
 654         return 0;
 655 }
 656
 657 static const struct i2c_device_id ssm2602_i2c_id[] = {
 658         { "ssm2602", 0 },
 659         { }
 660 };
 661 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
 662 /* corgi i2c codec control layer */
 663 static struct i2c_driver ssm2602_i2c_driver = {
 664         .driver = {
 665                 .name = "SSM2602 I2C Codec",
 666                 .owner = THIS_MODULE,
 667         },
 668         .probe = ssm2602_i2c_probe,
 669         .remove = ssm2602_i2c_remove,
 670         .id_table = ssm2602_i2c_id,
 671 };
 672
 673 static int ssm2602_add_i2c_device(struct platform_device *pdev,
 674                                   const struct ssm2602_setup_data *setup)
 675 {
 676         struct i2c_board_info info;
 677         struct i2c_adapter *adapter;
 678         struct i2c_client *client;
 679         int ret;
 680
 681         ret = i2c_add_driver(&ssm2602_i2c_driver);
 682         if (ret != 0) {
 683                 dev_err(&pdev->dev, "can't add i2c driver\n");
 684                 return ret;
 685         }
 686         memset(&info, 0, sizeof(struct i2c_board_info));
 687         info.addr = setup->i2c_address;
 688         strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
 689         adapter = i2c_get_adapter(setup->i2c_bus);
 690         if (!adapter) {
 691                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 692                 setup->i2c_bus);
 693                 goto err_driver;
 694         }
 695         client = i2c_new_device(adapter, &info);
 696         i2c_put_adapter(adapter);
 697         if (!client) {
 698                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 699                 (unsigned int)info.addr);
 700                 goto err_driver;
 701         }
 702         return 0;
 703 err_driver:
 704         i2c_del_driver(&ssm2602_i2c_driver);
 705         return -ENODEV;
 706 }
 707 #endif
 708
 709 static int ssm2602_probe(struct platform_device *pdev)
 710 {
 711         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 712         struct ssm2602_setup_data *setup;
 713         struct snd_soc_codec *codec;
 714         struct ssm2602_priv *ssm2602;
 715         int ret = 0;
 716
 717         pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
 718
 719         setup = socdev->codec_data;
 720         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 721         if (codec == NULL)
 722                 return -ENOMEM;
 723
 724         ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
 725         if (ssm2602 == NULL) {
 726                 kfree(codec);
 727                 return -ENOMEM;
 728         }
 729
 730         codec->private_data = ssm2602;
 731         socdev->card->codec = codec;
 732         mutex_init(&codec->mutex);
 733         INIT_LIST_HEAD(&codec->dapm_widgets);
 734         INIT_LIST_HEAD(&codec->dapm_paths);
 735
 736         ssm2602_socdev = socdev;
 737 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 738         if (setup->i2c_address) {
 739                 codec->hw_write = (hw_write_t)i2c_master_send;
 740                 ret = ssm2602_add_i2c_device(pdev, setup);
 741         }
 742 #else
 743         /* other interfaces */
 744 #endif
 745         return ret;
 746 }
 747
 748 /* remove everything here */
 749 static int ssm2602_remove(struct platform_device *pdev)
 750 {
 751         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 752         struct snd_soc_codec *codec = socdev->card->codec;
 753
 754         if (codec->control_data)
 755                 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 756
 757         snd_soc_free_pcms(socdev);
 758         snd_soc_dapm_free(socdev);
 759 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 760         i2c_unregister_device(codec->control_data);
 761         i2c_del_driver(&ssm2602_i2c_driver);
 762 #endif
 763         kfree(codec->private_data);
 764         kfree(codec);
 765
 766         return 0;
 767 }
 768
 769 struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
 770         .probe =        ssm2602_probe,
 771         .remove =       ssm2602_remove,
 772         .suspend =      ssm2602_suspend,
 773         .resume =       ssm2602_resume,
 774 };
 775 EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
 776
 777 static int __init ssm2602_modinit(void)
 778 {
 779         return snd_soc_register_dai(&ssm2602_dai);
 780 }
 781 module_init(ssm2602_modinit);
 782
 783 static void __exit ssm2602_exit(void)
 784 {
 785         snd_soc_unregister_dai(&ssm2602_dai);
 786 }
 787 module_exit(ssm2602_exit);
 788
 789 MODULE_DESCRIPTION("ASoC ssm2602 driver");
 790 MODULE_AUTHOR("Cliff Cai");
 791 MODULE_LICENSE("GPL");