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 /* add non dapm controls */
 155 static int ssm2602_add_controls(struct snd_soc_codec *codec)
 156 {
 157         int err, i;
 158
 159         for (i = 0; i < ARRAY_SIZE(ssm2602_snd_controls); i++) {
 160                 err = snd_ctl_add(codec->card,
 161                         snd_soc_cnew(&ssm2602_snd_controls[i], codec, NULL));
 162                 if (err < 0)
 163                         return err;
 164         }
 165
 166         return 0;
 167 }
 168
 169 /* Output Mixer */
 170 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
 171 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
 172 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
 173 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
 174 };
 175
 176 /* Input mux */
 177 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
 178 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
 179
 180 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
 181 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
 182         &ssm2602_output_mixer_controls[0],
 183         ARRAY_SIZE(ssm2602_output_mixer_controls)),
 184 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
 185 SND_SOC_DAPM_OUTPUT("LOUT"),
 186 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 187 SND_SOC_DAPM_OUTPUT("ROUT"),
 188 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 189 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
 190 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
 191 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
 192 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
 193 SND_SOC_DAPM_INPUT("MICIN"),
 194 SND_SOC_DAPM_INPUT("RLINEIN"),
 195 SND_SOC_DAPM_INPUT("LLINEIN"),
 196 };
 197
 198 static const struct snd_soc_dapm_route audio_conn[] = {
 199         /* output mixer */
 200         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 201         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 202         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 203
 204         /* outputs */
 205         {"RHPOUT", NULL, "Output Mixer"},
 206         {"ROUT", NULL, "Output Mixer"},
 207         {"LHPOUT", NULL, "Output Mixer"},
 208         {"LOUT", NULL, "Output Mixer"},
 209
 210         /* input mux */
 211         {"Input Mux", "Line", "Line Input"},
 212         {"Input Mux", "Mic", "Mic Bias"},
 213         {"ADC", NULL, "Input Mux"},
 214
 215         /* inputs */
 216         {"Line Input", NULL, "LLINEIN"},
 217         {"Line Input", NULL, "RLINEIN"},
 218         {"Mic Bias", NULL, "MICIN"},
 219 };
 220
 221 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
 222 {
 223         snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
 224                                   ARRAY_SIZE(ssm2602_dapm_widgets));
 225
 226         snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
 227
 228         snd_soc_dapm_new_widgets(codec);
 229         return 0;
 230 }
 231
 232 struct _coeff_div {
 233         u32 mclk;
 234         u32 rate;
 235         u16 fs;
 236         u8 sr:4;
 237         u8 bosr:1;
 238         u8 usb:1;
 239 };
 240
 241 /* codec mclk clock divider coefficients */
 242 static const struct _coeff_div coeff_div[] = {
 243         /* 48k */
 244         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 245         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 246         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 247
 248         /* 32k */
 249         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 250         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 251         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 252
 253         /* 8k */
 254         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 255         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 256         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 257         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 258         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 259
 260         /* 96k */
 261         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 262         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 263         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 264
 265         /* 44.1k */
 266         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 267         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 268         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 269
 270         /* 88.2k */
 271         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 272         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 273         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 274 };
 275
 276 static inline int get_coeff(int mclk, int rate)
 277 {
 278         int i;
 279
 280         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 281                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 282                         return i;
 283         }
 284         return i;
 285 }
 286
 287 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
 288         struct snd_pcm_hw_params *params,
 289         struct snd_soc_dai *dai)
 290 {
 291         u16 srate;
 292         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 293         struct snd_soc_device *socdev = rtd->socdev;
 294         struct snd_soc_codec *codec = socdev->codec;
 295         struct ssm2602_priv *ssm2602 = codec->private_data;
 296         struct i2c_client *i2c = codec->control_data;
 297         u16 iface = ssm2602_read_reg_cache(codec, SSM2602_IFACE) & 0xfff3;
 298         int i = get_coeff(ssm2602->sysclk, params_rate(params));
 299
 300         if (substream == ssm2602->slave_substream) {
 301                 dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
 302                 return 0;
 303         }
 304
 305         /*no match is found*/
 306         if (i == ARRAY_SIZE(coeff_div))
 307                 return -EINVAL;
 308
 309         srate = (coeff_div[i].sr << 2) |
 310                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 311
 312         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 313         ssm2602_write(codec, SSM2602_SRATE, srate);
 314
 315         /* bit size */
 316         switch (params_format(params)) {
 317         case SNDRV_PCM_FORMAT_S16_LE:
 318                 break;
 319         case SNDRV_PCM_FORMAT_S20_3LE:
 320                 iface |= 0x0004;
 321                 break;
 322         case SNDRV_PCM_FORMAT_S24_LE:
 323                 iface |= 0x0008;
 324                 break;
 325         case SNDRV_PCM_FORMAT_S32_LE:
 326                 iface |= 0x000c;
 327                 break;
 328         }
 329         ssm2602_write(codec, SSM2602_IFACE, iface);
 330         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 331         return 0;
 332 }
 333
 334 static int ssm2602_startup(struct snd_pcm_substream *substream,
 335                            struct snd_soc_dai *dai)
 336 {
 337         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 338         struct snd_soc_device *socdev = rtd->socdev;
 339         struct snd_soc_codec *codec = socdev->codec;
 340         struct ssm2602_priv *ssm2602 = codec->private_data;
 341         struct i2c_client *i2c = codec->control_data;
 342         struct snd_pcm_runtime *master_runtime;
 343
 344         /* The DAI has shared clocks so if we already have a playback or
 345          * capture going then constrain this substream to match it.
 346          * TODO: the ssm2602 allows pairs of non-matching PB/REC rates
 347          */
 348         if (ssm2602->master_substream) {
 349                 master_runtime = ssm2602->master_substream->runtime;
 350                 dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
 351                         master_runtime->sample_bits,
 352                         master_runtime->rate);
 353
 354                 snd_pcm_hw_constraint_minmax(substream->runtime,
 355                                              SNDRV_PCM_HW_PARAM_RATE,
 356                                              master_runtime->rate,
 357                                              master_runtime->rate);
 358
 359                 snd_pcm_hw_constraint_minmax(substream->runtime,
 360                                              SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 361                                              master_runtime->sample_bits,
 362                                              master_runtime->sample_bits);
 363
 364                 ssm2602->slave_substream = substream;
 365         } else
 366                 ssm2602->master_substream = substream;
 367
 368         return 0;
 369 }
 370
 371 static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream,
 372                                struct snd_soc_dai *dai)
 373 {
 374         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 375         struct snd_soc_device *socdev = rtd->socdev;
 376         struct snd_soc_codec *codec = socdev->codec;
 377         /* set active */
 378         ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
 379
 380         return 0;
 381 }
 382
 383 static void ssm2602_shutdown(struct snd_pcm_substream *substream,
 384                              struct snd_soc_dai *dai)
 385 {
 386         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 387         struct snd_soc_device *socdev = rtd->socdev;
 388         struct snd_soc_codec *codec = socdev->codec;
 389         struct ssm2602_priv *ssm2602 = codec->private_data;
 390         /* deactivate */
 391         if (!codec->active)
 392                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 393
 394         if (ssm2602->master_substream == substream)
 395                 ssm2602->master_substream = ssm2602->slave_substream;
 396
 397         ssm2602->slave_substream = NULL;
 398 }
 399
 400 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
 401 {
 402         struct snd_soc_codec *codec = dai->codec;
 403         u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
 404         if (mute)
 405                 ssm2602_write(codec, SSM2602_APDIGI,
 406                                 mute_reg | APDIGI_ENABLE_DAC_MUTE);
 407         else
 408                 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
 409         return 0;
 410 }
 411
 412 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 413                 int clk_id, unsigned int freq, int dir)
 414 {
 415         struct snd_soc_codec *codec = codec_dai->codec;
 416         struct ssm2602_priv *ssm2602 = codec->private_data;
 417         switch (freq) {
 418         case 11289600:
 419         case 12000000:
 420         case 12288000:
 421         case 16934400:
 422         case 18432000:
 423                 ssm2602->sysclk = freq;
 424                 return 0;
 425         }
 426         return -EINVAL;
 427 }
 428
 429 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
 430                 unsigned int fmt)
 431 {
 432         struct snd_soc_codec *codec = codec_dai->codec;
 433         u16 iface = 0;
 434
 435         /* set master/slave audio interface */
 436         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 437         case SND_SOC_DAIFMT_CBM_CFM:
 438                 iface |= 0x0040;
 439                 break;
 440         case SND_SOC_DAIFMT_CBS_CFS:
 441                 break;
 442         default:
 443                 return -EINVAL;
 444         }
 445
 446         /* interface format */
 447         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 448         case SND_SOC_DAIFMT_I2S:
 449                 iface |= 0x0002;
 450                 break;
 451         case SND_SOC_DAIFMT_RIGHT_J:
 452                 break;
 453         case SND_SOC_DAIFMT_LEFT_J:
 454                 iface |= 0x0001;
 455                 break;
 456         case SND_SOC_DAIFMT_DSP_A:
 457                 iface |= 0x0013;
 458                 break;
 459         case SND_SOC_DAIFMT_DSP_B:
 460                 iface |= 0x0003;
 461                 break;
 462         default:
 463                 return -EINVAL;
 464         }
 465
 466         /* clock inversion */
 467         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 468         case SND_SOC_DAIFMT_NB_NF:
 469                 break;
 470         case SND_SOC_DAIFMT_IB_IF:
 471                 iface |= 0x0090;
 472                 break;
 473         case SND_SOC_DAIFMT_IB_NF:
 474                 iface |= 0x0080;
 475                 break;
 476         case SND_SOC_DAIFMT_NB_IF:
 477                 iface |= 0x0010;
 478                 break;
 479         default:
 480                 return -EINVAL;
 481         }
 482
 483         /* set iface */
 484         ssm2602_write(codec, SSM2602_IFACE, iface);
 485         return 0;
 486 }
 487
 488 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
 489                                  enum snd_soc_bias_level level)
 490 {
 491         u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
 492
 493         switch (level) {
 494         case SND_SOC_BIAS_ON:
 495                 /* vref/mid, osc on, dac unmute */
 496                 ssm2602_write(codec, SSM2602_PWR, reg);
 497                 break;
 498         case SND_SOC_BIAS_PREPARE:
 499                 break;
 500         case SND_SOC_BIAS_STANDBY:
 501                 /* everything off except vref/vmid, */
 502                 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
 503                 break;
 504         case SND_SOC_BIAS_OFF:
 505                 /* everything off, dac mute, inactive */
 506                 ssm2602_write(codec, SSM2602_ACTIVE, 0);
 507                 ssm2602_write(codec, SSM2602_PWR, 0xffff);
 508                 break;
 509
 510         }
 511         codec->bias_level = level;
 512         return 0;
 513 }
 514
 515 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 516                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
 517                 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 518                 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 519                 SNDRV_PCM_RATE_96000)
 520
 521 #define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 522                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 523
 524 struct snd_soc_dai ssm2602_dai = {
 525         .name = "SSM2602",
 526         .playback = {
 527                 .stream_name = "Playback",
 528                 .channels_min = 2,
 529                 .channels_max = 2,
 530                 .rates = SSM2602_RATES,
 531                 .formats = SSM2602_FORMATS,},
 532         .capture = {
 533                 .stream_name = "Capture",
 534                 .channels_min = 2,
 535                 .channels_max = 2,
 536                 .rates = SSM2602_RATES,
 537                 .formats = SSM2602_FORMATS,},
 538         .ops = {
 539                 .startup = ssm2602_startup,
 540                 .prepare = ssm2602_pcm_prepare,
 541                 .hw_params = ssm2602_hw_params,
 542                 .shutdown = ssm2602_shutdown,
 543                 .digital_mute = ssm2602_mute,
 544                 .set_sysclk = ssm2602_set_dai_sysclk,
 545                 .set_fmt = ssm2602_set_dai_fmt,
 546         }
 547 };
 548 EXPORT_SYMBOL_GPL(ssm2602_dai);
 549
 550 static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
 551 {
 552         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 553         struct snd_soc_codec *codec = socdev->codec;
 554
 555         ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 556         return 0;
 557 }
 558
 559 static int ssm2602_resume(struct platform_device *pdev)
 560 {
 561         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 562         struct snd_soc_codec *codec = socdev->codec;
 563         int i;
 564         u8 data[2];
 565         u16 *cache = codec->reg_cache;
 566
 567         /* Sync reg_cache with the hardware */
 568         for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
 569                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 570                 data[1] = cache[i] & 0x00ff;
 571                 codec->hw_write(codec->control_data, data, 2);
 572         }
 573         ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 574         ssm2602_set_bias_level(codec, codec->suspend_bias_level);
 575         return 0;
 576 }
 577
 578 /*
 579  * initialise the ssm2602 driver
 580  * register the mixer and dsp interfaces with the kernel
 581  */
 582 static int ssm2602_init(struct snd_soc_device *socdev)
 583 {
 584         struct snd_soc_codec *codec = socdev->codec;
 585         int reg, ret = 0;
 586
 587         codec->name = "SSM2602";
 588         codec->owner = THIS_MODULE;
 589         codec->read = ssm2602_read_reg_cache;
 590         codec->write = ssm2602_write;
 591         codec->set_bias_level = ssm2602_set_bias_level;
 592         codec->dai = &ssm2602_dai;
 593         codec->num_dai = 1;
 594         codec->reg_cache_size = sizeof(ssm2602_reg);
 595         codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
 596                                         GFP_KERNEL);
 597         if (codec->reg_cache == NULL)
 598                 return -ENOMEM;
 599
 600         ssm2602_reset(codec);
 601
 602         /* register pcms */
 603         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 604         if (ret < 0) {
 605                 pr_err("ssm2602: failed to create pcms\n");
 606                 goto pcm_err;
 607         }
 608         /*power on device*/
 609         ssm2602_write(codec, SSM2602_ACTIVE, 0);
 610         /* set the update bits */
 611         reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
 612         ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
 613         reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
 614         ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
 615         reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
 616         ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
 617         reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
 618         ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
 619         /*select Line in as default input*/
 620         ssm2602_write(codec, SSM2602_APANA,
 621                         APANA_ENABLE_MIC_BOOST2 | APANA_SELECT_DAC |
 622                         APANA_ENABLE_MIC_BOOST);
 623         ssm2602_write(codec, SSM2602_PWR, 0);
 624
 625         ssm2602_add_controls(codec);
 626         ssm2602_add_widgets(codec);
 627         ret = snd_soc_init_card(socdev);
 628         if (ret < 0) {
 629                 pr_err("ssm2602: failed to register card\n");
 630                 goto card_err;
 631         }
 632
 633         return ret;
 634
 635 card_err:
 636         snd_soc_free_pcms(socdev);
 637         snd_soc_dapm_free(socdev);
 638 pcm_err:
 639         kfree(codec->reg_cache);
 640         return ret;
 641 }
 642
 643 static struct snd_soc_device *ssm2602_socdev;
 644
 645 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 646 /*
 647  * ssm2602 2 wire address is determined by GPIO5
 648  * state during powerup.
 649  *    low  = 0x1a
 650  *    high = 0x1b
 651  */
 652 static int ssm2602_i2c_probe(struct i2c_client *i2c,
 653                              const struct i2c_device_id *id)
 654 {
 655         struct snd_soc_device *socdev = ssm2602_socdev;
 656         struct snd_soc_codec *codec = socdev->codec;
 657         int ret;
 658
 659         i2c_set_clientdata(i2c, codec);
 660         codec->control_data = i2c;
 661
 662         ret = ssm2602_init(socdev);
 663         if (ret < 0)
 664                 pr_err("failed to initialise SSM2602\n");
 665
 666         return ret;
 667 }
 668
 669 static int ssm2602_i2c_remove(struct i2c_client *client)
 670 {
 671         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 672         kfree(codec->reg_cache);
 673         return 0;
 674 }
 675
 676 static const struct i2c_device_id ssm2602_i2c_id[] = {
 677         { "ssm2602", 0 },
 678         { }
 679 };
 680 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
 681 /* corgi i2c codec control layer */
 682 static struct i2c_driver ssm2602_i2c_driver = {
 683         .driver = {
 684                 .name = "SSM2602 I2C Codec",
 685                 .owner = THIS_MODULE,
 686         },
 687         .probe = ssm2602_i2c_probe,
 688         .remove = ssm2602_i2c_remove,
 689         .id_table = ssm2602_i2c_id,
 690 };
 691
 692 static int ssm2602_add_i2c_device(struct platform_device *pdev,
 693                                   const struct ssm2602_setup_data *setup)
 694 {
 695         struct i2c_board_info info;
 696         struct i2c_adapter *adapter;
 697         struct i2c_client *client;
 698         int ret;
 699
 700         ret = i2c_add_driver(&ssm2602_i2c_driver);
 701         if (ret != 0) {
 702                 dev_err(&pdev->dev, "can't add i2c driver\n");
 703                 return ret;
 704         }
 705         memset(&info, 0, sizeof(struct i2c_board_info));
 706         info.addr = setup->i2c_address;
 707         strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
 708         adapter = i2c_get_adapter(setup->i2c_bus);
 709         if (!adapter) {
 710                 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
 711                 setup->i2c_bus);
 712                 goto err_driver;
 713         }
 714         client = i2c_new_device(adapter, &info);
 715         i2c_put_adapter(adapter);
 716         if (!client) {
 717                 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
 718                 (unsigned int)info.addr);
 719                 goto err_driver;
 720         }
 721         return 0;
 722 err_driver:
 723         i2c_del_driver(&ssm2602_i2c_driver);
 724         return -ENODEV;
 725 }
 726 #endif
 727
 728 static int ssm2602_probe(struct platform_device *pdev)
 729 {
 730         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 731         struct ssm2602_setup_data *setup;
 732         struct snd_soc_codec *codec;
 733         struct ssm2602_priv *ssm2602;
 734         int ret = 0;
 735
 736         pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
 737
 738         setup = socdev->codec_data;
 739         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 740         if (codec == NULL)
 741                 return -ENOMEM;
 742
 743         ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
 744         if (ssm2602 == NULL) {
 745                 kfree(codec);
 746                 return -ENOMEM;
 747         }
 748
 749         codec->private_data = ssm2602;
 750         socdev->codec = codec;
 751         mutex_init(&codec->mutex);
 752         INIT_LIST_HEAD(&codec->dapm_widgets);
 753         INIT_LIST_HEAD(&codec->dapm_paths);
 754
 755         ssm2602_socdev = socdev;
 756 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 757         if (setup->i2c_address) {
 758                 codec->hw_write = (hw_write_t)i2c_master_send;
 759                 ret = ssm2602_add_i2c_device(pdev, setup);
 760         }
 761 #else
 762         /* other interfaces */
 763 #endif
 764         return ret;
 765 }
 766
 767 /* remove everything here */
 768 static int ssm2602_remove(struct platform_device *pdev)
 769 {
 770         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 771         struct snd_soc_codec *codec = socdev->codec;
 772
 773         if (codec->control_data)
 774                 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
 775
 776         snd_soc_free_pcms(socdev);
 777         snd_soc_dapm_free(socdev);
 778 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 779         i2c_unregister_device(codec->control_data);
 780         i2c_del_driver(&ssm2602_i2c_driver);
 781 #endif
 782         kfree(codec->private_data);
 783         kfree(codec);
 784
 785         return 0;
 786 }
 787
 788 struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
 789         .probe =        ssm2602_probe,
 790         .remove =       ssm2602_remove,
 791         .suspend =      ssm2602_suspend,
 792         .resume =       ssm2602_resume,
 793 };
 794 EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
 795
 796 static int __init ssm2602_modinit(void)
 797 {
 798         return snd_soc_register_dai(&ssm2602_dai);
 799 }
 800 module_init(ssm2602_modinit);
 801
 802 static void __exit ssm2602_exit(void)
 803 {
 804         snd_soc_unregister_dai(&ssm2602_dai);
 805 }
 806 module_exit(ssm2602_exit);
 807
 808 MODULE_DESCRIPTION("ASoC ssm2602 driver");
 809 MODULE_AUTHOR("Cliff Cai");
 810 MODULE_LICENSE("GPL");