sound/soc/codecs/sirf-audio-codec.c

   1 /*
   2  * SiRF audio codec driver
   3  *
   4  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
   5  *
   6  * Licensed under GPLv2 or later.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/pm_runtime.h>
  12 #include <linux/of.h>
  13 #include <linux/of_device.h>
  14 #include <linux/clk.h>
  15 #include <linux/delay.h>
  16 #include <linux/io.h>
  17 #include <linux/regmap.h>
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/pcm_params.h>
  21 #include <sound/initval.h>
  22 #include <sound/tlv.h>
  23 #include <sound/soc.h>
  24 #include <sound/dmaengine_pcm.h>
  25
  26 #include "sirf-audio-codec.h"
  27
  28 struct sirf_audio_codec {
  29         struct clk *clk;
  30         struct regmap *regmap;
  31         u32 reg_ctrl0, reg_ctrl1;
  32 };
  33
  34 static const char * const input_mode_mux[] = {"Single-ended",
  35         "Differential"};
  36
  37 static const struct soc_enum input_mode_mux_enum =
  38         SOC_ENUM_SINGLE(AUDIO_IC_CODEC_CTRL1, 4, 2, input_mode_mux);
  39
  40 static const struct snd_kcontrol_new sirf_audio_codec_input_mode_control =
  41         SOC_DAPM_ENUM("Route", input_mode_mux_enum);
  42
  43 static const DECLARE_TLV_DB_SCALE(playback_vol_tlv, -12400, 100, 0);
  44 static const DECLARE_TLV_DB_SCALE(capture_vol_tlv_prima2, 500, 100, 0);
  45 static const DECLARE_TLV_DB_RANGE(capture_vol_tlv_atlas6,
  46         0, 7, TLV_DB_SCALE_ITEM(-100, 100, 0),
  47         0x22, 0x3F, TLV_DB_SCALE_ITEM(700, 100, 0),
  48 );
  49
  50 static struct snd_kcontrol_new volume_controls_atlas6[] = {
  51         SOC_DOUBLE_TLV("Playback Volume", AUDIO_IC_CODEC_CTRL0, 21, 14,
  52                         0x7F, 0, playback_vol_tlv),
  53         SOC_DOUBLE_TLV("Capture Volume", AUDIO_IC_CODEC_CTRL1, 16, 10,
  54                         0x3F, 0, capture_vol_tlv_atlas6),
  55 };
  56
  57 static struct snd_kcontrol_new volume_controls_prima2[] = {
  58         SOC_DOUBLE_TLV("Speaker Volume", AUDIO_IC_CODEC_CTRL0, 21, 14,
  59                         0x7F, 0, playback_vol_tlv),
  60         SOC_DOUBLE_TLV("Capture Volume", AUDIO_IC_CODEC_CTRL1, 15, 10,
  61                         0x1F, 0, capture_vol_tlv_prima2),
  62 };
  63
  64 static struct snd_kcontrol_new left_input_path_controls[] = {
  65         SOC_DAPM_SINGLE("Line Left Switch", AUDIO_IC_CODEC_CTRL1, 6, 1, 0),
  66         SOC_DAPM_SINGLE("Mic Left Switch", AUDIO_IC_CODEC_CTRL1, 3, 1, 0),
  67 };
  68
  69 static struct snd_kcontrol_new right_input_path_controls[] = {
  70         SOC_DAPM_SINGLE("Line Right Switch", AUDIO_IC_CODEC_CTRL1, 5, 1, 0),
  71         SOC_DAPM_SINGLE("Mic Right Switch", AUDIO_IC_CODEC_CTRL1, 2, 1, 0),
  72 };
  73
  74 static struct snd_kcontrol_new left_dac_to_hp_left_amp_switch_control =
  75         SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 9, 1, 0);
  76
  77 static struct snd_kcontrol_new left_dac_to_hp_right_amp_switch_control =
  78         SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 8, 1, 0);
  79
  80 static struct snd_kcontrol_new right_dac_to_hp_left_amp_switch_control =
  81         SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 7, 1, 0);
  82
  83 static struct snd_kcontrol_new right_dac_to_hp_right_amp_switch_control =
  84         SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 6, 1, 0);
  85
  86 static struct snd_kcontrol_new left_dac_to_speaker_lineout_switch_control =
  87         SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 11, 1, 0);
  88
  89 static struct snd_kcontrol_new right_dac_to_speaker_lineout_switch_control =
  90         SOC_DAPM_SINGLE("Switch", AUDIO_IC_CODEC_CTRL0, 10, 1, 0);
  91
  92 /* After enable adc, Delay 200ms to avoid pop noise */
  93 static int adc_enable_delay_event(struct snd_soc_dapm_widget *w,
  94                 struct snd_kcontrol *kcontrol, int event)
  95 {
  96         switch (event) {
  97         case SND_SOC_DAPM_POST_PMU:
  98                 msleep(200);
  99                 break;
 100         default:
 101                 break;
 102         }
 103
 104         return 0;
 105 }
 106
 107 static void enable_and_reset_codec(struct regmap *regmap,
 108                 u32 codec_enable_bits, u32 codec_reset_bits)
 109 {
 110         regmap_update_bits(regmap, AUDIO_IC_CODEC_CTRL1,
 111                         codec_enable_bits | codec_reset_bits,
 112                         codec_enable_bits | ~codec_reset_bits);
 113         msleep(20);
 114         regmap_update_bits(regmap, AUDIO_IC_CODEC_CTRL1,
 115                         codec_reset_bits, codec_reset_bits);
 116 }
 117
 118 static int atlas6_codec_enable_and_reset_event(struct snd_soc_dapm_widget *w,
 119                 struct snd_kcontrol *kcontrol, int event)
 120 {
 121 #define ATLAS6_CODEC_ENABLE_BITS (1 << 29)
 122 #define ATLAS6_CODEC_RESET_BITS (1 << 28)
 123         struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(w->codec->dev);
 124         switch (event) {
 125         case SND_SOC_DAPM_PRE_PMU:
 126                 enable_and_reset_codec(sirf_audio_codec->regmap,
 127                         ATLAS6_CODEC_ENABLE_BITS, ATLAS6_CODEC_RESET_BITS);
 128                 break;
 129         case SND_SOC_DAPM_POST_PMD:
 130                 regmap_update_bits(sirf_audio_codec->regmap,
 131                         AUDIO_IC_CODEC_CTRL1, ATLAS6_CODEC_ENABLE_BITS,
 132                         ~ATLAS6_CODEC_ENABLE_BITS);
 133                 break;
 134         default:
 135                 break;
 136         }
 137
 138         return 0;
 139 }
 140
 141 static int prima2_codec_enable_and_reset_event(struct snd_soc_dapm_widget *w,
 142                 struct snd_kcontrol *kcontrol, int event)
 143 {
 144 #define PRIMA2_CODEC_ENABLE_BITS (1 << 27)
 145 #define PRIMA2_CODEC_RESET_BITS (1 << 26)
 146         struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(w->codec->dev);
 147         switch (event) {
 148         case SND_SOC_DAPM_POST_PMU:
 149                 enable_and_reset_codec(sirf_audio_codec->regmap,
 150                         PRIMA2_CODEC_ENABLE_BITS, PRIMA2_CODEC_RESET_BITS);
 151                 break;
 152         case SND_SOC_DAPM_POST_PMD:
 153                 regmap_update_bits(sirf_audio_codec->regmap,
 154                         AUDIO_IC_CODEC_CTRL1, PRIMA2_CODEC_ENABLE_BITS,
 155                         ~PRIMA2_CODEC_ENABLE_BITS);
 156                 break;
 157         default:
 158                 break;
 159         }
 160
 161         return 0;
 162 }
 163
 164 static const struct snd_soc_dapm_widget atlas6_output_driver_dapm_widgets[] = {
 165         SND_SOC_DAPM_OUT_DRV("HP Left Driver", AUDIO_IC_CODEC_CTRL1,
 166                         25, 0, NULL, 0),
 167         SND_SOC_DAPM_OUT_DRV("HP Right Driver", AUDIO_IC_CODEC_CTRL1,
 168                         26, 0, NULL, 0),
 169         SND_SOC_DAPM_OUT_DRV("Speaker Driver", AUDIO_IC_CODEC_CTRL1,
 170                         27, 0, NULL, 0),
 171 };
 172
 173 static const struct snd_soc_dapm_widget prima2_output_driver_dapm_widgets[] = {
 174         SND_SOC_DAPM_OUT_DRV("HP Left Driver", AUDIO_IC_CODEC_CTRL1,
 175                         23, 0, NULL, 0),
 176         SND_SOC_DAPM_OUT_DRV("HP Right Driver", AUDIO_IC_CODEC_CTRL1,
 177                         24, 0, NULL, 0),
 178         SND_SOC_DAPM_OUT_DRV("Speaker Driver", AUDIO_IC_CODEC_CTRL1,
 179                         25, 0, NULL, 0),
 180 };
 181
 182 static const struct snd_soc_dapm_widget atlas6_codec_clock_dapm_widget =
 183         SND_SOC_DAPM_SUPPLY("codecclk", SND_SOC_NOPM, 0, 0,
 184                         atlas6_codec_enable_and_reset_event,
 185                         SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD);
 186
 187 static const struct snd_soc_dapm_widget prima2_codec_clock_dapm_widget =
 188         SND_SOC_DAPM_SUPPLY("codecclk", SND_SOC_NOPM, 0, 0,
 189                         prima2_codec_enable_and_reset_event,
 190                         SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD);
 191
 192 static const struct snd_soc_dapm_widget sirf_audio_codec_dapm_widgets[] = {
 193         SND_SOC_DAPM_DAC("DAC left", NULL, AUDIO_IC_CODEC_CTRL0, 1, 0),
 194         SND_SOC_DAPM_DAC("DAC right", NULL, AUDIO_IC_CODEC_CTRL0, 0, 0),
 195         SND_SOC_DAPM_SWITCH("Left dac to hp left amp", SND_SOC_NOPM, 0, 0,
 196                         &left_dac_to_hp_left_amp_switch_control),
 197         SND_SOC_DAPM_SWITCH("Left dac to hp right amp", SND_SOC_NOPM, 0, 0,
 198                         &left_dac_to_hp_right_amp_switch_control),
 199         SND_SOC_DAPM_SWITCH("Right dac to hp left amp", SND_SOC_NOPM, 0, 0,
 200                         &right_dac_to_hp_left_amp_switch_control),
 201         SND_SOC_DAPM_SWITCH("Right dac to hp right amp", SND_SOC_NOPM, 0, 0,
 202                         &right_dac_to_hp_right_amp_switch_control),
 203         SND_SOC_DAPM_OUT_DRV("HP amp left driver", AUDIO_IC_CODEC_CTRL0, 3, 0,
 204                         NULL, 0),
 205         SND_SOC_DAPM_OUT_DRV("HP amp right driver", AUDIO_IC_CODEC_CTRL0, 3, 0,
 206                         NULL, 0),
 207
 208         SND_SOC_DAPM_SWITCH("Left dac to speaker lineout", SND_SOC_NOPM, 0, 0,
 209                         &left_dac_to_speaker_lineout_switch_control),
 210         SND_SOC_DAPM_SWITCH("Right dac to speaker lineout", SND_SOC_NOPM, 0, 0,
 211                         &right_dac_to_speaker_lineout_switch_control),
 212         SND_SOC_DAPM_OUT_DRV("Speaker amp driver", AUDIO_IC_CODEC_CTRL0, 4, 0,
 213                         NULL, 0),
 214
 215         SND_SOC_DAPM_OUTPUT("HPOUTL"),
 216         SND_SOC_DAPM_OUTPUT("HPOUTR"),
 217         SND_SOC_DAPM_OUTPUT("SPKOUT"),
 218
 219         SND_SOC_DAPM_ADC_E("ADC left", NULL, AUDIO_IC_CODEC_CTRL1, 8, 0,
 220                         adc_enable_delay_event, SND_SOC_DAPM_POST_PMU),
 221         SND_SOC_DAPM_ADC_E("ADC right", NULL, AUDIO_IC_CODEC_CTRL1, 7, 0,
 222                         adc_enable_delay_event, SND_SOC_DAPM_POST_PMU),
 223         SND_SOC_DAPM_MIXER("Left PGA mixer", AUDIO_IC_CODEC_CTRL1, 1, 0,
 224                 &left_input_path_controls[0],
 225                 ARRAY_SIZE(left_input_path_controls)),
 226         SND_SOC_DAPM_MIXER("Right PGA mixer", AUDIO_IC_CODEC_CTRL1, 0, 0,
 227                 &right_input_path_controls[0],
 228                 ARRAY_SIZE(right_input_path_controls)),
 229
 230         SND_SOC_DAPM_MUX("Mic input mode mux", SND_SOC_NOPM, 0, 0,
 231                         &sirf_audio_codec_input_mode_control),
 232         SND_SOC_DAPM_MICBIAS("Mic Bias", AUDIO_IC_CODEC_PWR, 3, 0),
 233         SND_SOC_DAPM_INPUT("MICIN1"),
 234         SND_SOC_DAPM_INPUT("MICIN2"),
 235         SND_SOC_DAPM_INPUT("LINEIN1"),
 236         SND_SOC_DAPM_INPUT("LINEIN2"),
 237
 238         SND_SOC_DAPM_SUPPLY("HSL Phase Opposite", AUDIO_IC_CODEC_CTRL0,
 239                         30, 0, NULL, 0),
 240 };
 241
 242 static const struct snd_soc_dapm_route sirf_audio_codec_map[] = {
 243         {"SPKOUT", NULL, "Speaker Driver"},
 244         {"Speaker Driver", NULL, "Speaker amp driver"},
 245         {"Speaker amp driver", NULL, "Left dac to speaker lineout"},
 246         {"Speaker amp driver", NULL, "Right dac to speaker lineout"},
 247         {"Left dac to speaker lineout", "Switch", "DAC left"},
 248         {"Right dac to speaker lineout", "Switch", "DAC right"},
 249         {"HPOUTL", NULL, "HP Left Driver"},
 250         {"HPOUTR", NULL, "HP Right Driver"},
 251         {"HP Left Driver", NULL, "HP amp left driver"},
 252         {"HP Right Driver", NULL, "HP amp right driver"},
 253         {"HP amp left driver", NULL, "Right dac to hp left amp"},
 254         {"HP amp right driver", NULL , "Right dac to hp right amp"},
 255         {"HP amp left driver", NULL, "Left dac to hp left amp"},
 256         {"HP amp right driver", NULL , "Right dac to hp right amp"},
 257         {"Right dac to hp left amp", "Switch", "DAC left"},
 258         {"Right dac to hp right amp", "Switch", "DAC right"},
 259         {"Left dac to hp left amp", "Switch", "DAC left"},
 260         {"Left dac to hp right amp", "Switch", "DAC right"},
 261         {"DAC left", NULL, "codecclk"},
 262         {"DAC right", NULL, "codecclk"},
 263         {"DAC left", NULL, "Playback"},
 264         {"DAC right", NULL, "Playback"},
 265         {"DAC left", NULL, "HSL Phase Opposite"},
 266         {"DAC right", NULL, "HSL Phase Opposite"},
 267
 268         {"Capture", NULL, "ADC left"},
 269         {"Capture", NULL, "ADC right"},
 270         {"ADC left", NULL, "codecclk"},
 271         {"ADC right", NULL, "codecclk"},
 272         {"ADC left", NULL, "Left PGA mixer"},
 273         {"ADC right", NULL, "Right PGA mixer"},
 274         {"Left PGA mixer", "Line Left Switch", "LINEIN2"},
 275         {"Right PGA mixer", "Line Right Switch", "LINEIN1"},
 276         {"Left PGA mixer", "Mic Left Switch", "MICIN2"},
 277         {"Right PGA mixer", "Mic Right Switch", "Mic input mode mux"},
 278         {"Mic input mode mux", "Single-ended", "MICIN1"},
 279         {"Mic input mode mux", "Differential", "MICIN1"},
 280 };
 281
 282 static int sirf_audio_codec_trigger(struct snd_pcm_substream *substream,
 283                 int cmd,
 284                 struct snd_soc_dai *dai)
 285 {
 286         int playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 287         struct snd_soc_codec *codec = dai->codec;
 288         u32 val = 0;
 289
 290         /*
 291          * This is a workaround, When stop playback,
 292          * need disable HP amp, avoid the current noise.
 293          */
 294         switch (cmd) {
 295         case SNDRV_PCM_TRIGGER_STOP:
 296         case SNDRV_PCM_TRIGGER_SUSPEND:
 297         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 298                 break;
 299         case SNDRV_PCM_TRIGGER_START:
 300         case SNDRV_PCM_TRIGGER_RESUME:
 301         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 302                 if (playback)
 303                         val = IC_HSLEN | IC_HSREN;
 304                 break;
 305         default:
 306                 return -EINVAL;
 307         }
 308
 309         if (playback)
 310                 snd_soc_update_bits(codec, AUDIO_IC_CODEC_CTRL0,
 311                         IC_HSLEN | IC_HSREN, val);
 312         return 0;
 313 }
 314
 315 struct snd_soc_dai_ops sirf_audio_codec_dai_ops = {
 316         .trigger = sirf_audio_codec_trigger,
 317 };
 318
 319 struct snd_soc_dai_driver sirf_audio_codec_dai = {
 320         .name = "sirf-audio-codec",
 321         .playback = {
 322                 .stream_name = "Playback",
 323                 .channels_min = 2,
 324                 .channels_max = 2,
 325                 .rates = SNDRV_PCM_RATE_48000,
 326                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 327         },
 328         .capture = {
 329                 .stream_name = "Capture",
 330                 .channels_min = 1,
 331                 .channels_max = 2,
 332                 .rates = SNDRV_PCM_RATE_48000,
 333                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 334         },
 335         .ops = &sirf_audio_codec_dai_ops,
 336 };
 337
 338 static int sirf_audio_codec_probe(struct snd_soc_codec *codec)
 339 {
 340         struct snd_soc_dapm_context *dapm = &codec->dapm;
 341
 342         pm_runtime_enable(codec->dev);
 343
 344         if (of_device_is_compatible(codec->dev->of_node, "sirf,prima2-audio-codec")) {
 345                 snd_soc_dapm_new_controls(dapm,
 346                         prima2_output_driver_dapm_widgets,
 347                         ARRAY_SIZE(prima2_output_driver_dapm_widgets));
 348                 snd_soc_dapm_new_controls(dapm,
 349                         &prima2_codec_clock_dapm_widget, 1);
 350                 return snd_soc_add_codec_controls(codec,
 351                         volume_controls_prima2,
 352                         ARRAY_SIZE(volume_controls_prima2));
 353         }
 354         if (of_device_is_compatible(codec->dev->of_node, "sirf,atlas6-audio-codec")) {
 355                 snd_soc_dapm_new_controls(dapm,
 356                         atlas6_output_driver_dapm_widgets,
 357                         ARRAY_SIZE(atlas6_output_driver_dapm_widgets));
 358                 snd_soc_dapm_new_controls(dapm,
 359                         &atlas6_codec_clock_dapm_widget, 1);
 360                 return snd_soc_add_codec_controls(codec,
 361                         volume_controls_atlas6,
 362                         ARRAY_SIZE(volume_controls_atlas6));
 363         }
 364
 365         return -EINVAL;
 366 }
 367
 368 static int sirf_audio_codec_remove(struct snd_soc_codec *codec)
 369 {
 370         pm_runtime_disable(codec->dev);
 371         return 0;
 372 }
 373
 374 static struct snd_soc_codec_driver soc_codec_device_sirf_audio_codec = {
 375         .probe = sirf_audio_codec_probe,
 376         .remove = sirf_audio_codec_remove,
 377         .dapm_widgets = sirf_audio_codec_dapm_widgets,
 378         .num_dapm_widgets = ARRAY_SIZE(sirf_audio_codec_dapm_widgets),
 379         .dapm_routes = sirf_audio_codec_map,
 380         .num_dapm_routes = ARRAY_SIZE(sirf_audio_codec_map),
 381         .idle_bias_off = true,
 382 };
 383
 384 static const struct of_device_id sirf_audio_codec_of_match[] = {
 385         { .compatible = "sirf,prima2-audio-codec" },
 386         { .compatible = "sirf,atlas6-audio-codec" },
 387         {}
 388 };
 389 MODULE_DEVICE_TABLE(of, sirf_audio_codec_of_match);
 390
 391 static const struct regmap_config sirf_audio_codec_regmap_config = {
 392         .reg_bits = 32,
 393         .reg_stride = 4,
 394         .val_bits = 32,
 395         .max_register = AUDIO_IC_CODEC_CTRL3,
 396         .cache_type = REGCACHE_NONE,
 397 };
 398
 399 static int sirf_audio_codec_driver_probe(struct platform_device *pdev)
 400 {
 401         int ret;
 402         struct sirf_audio_codec *sirf_audio_codec;
 403         void __iomem *base;
 404         struct resource *mem_res;
 405         const struct of_device_id *match;
 406
 407         match = of_match_node(sirf_audio_codec_of_match, pdev->dev.of_node);
 408
 409         sirf_audio_codec = devm_kzalloc(&pdev->dev,
 410                 sizeof(struct sirf_audio_codec), GFP_KERNEL);
 411         if (!sirf_audio_codec)
 412                 return -ENOMEM;
 413
 414         platform_set_drvdata(pdev, sirf_audio_codec);
 415
 416         mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 417         base = devm_ioremap_resource(&pdev->dev, mem_res);
 418         if (base == NULL)
 419                 return -ENOMEM;
 420
 421         sirf_audio_codec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
 422                                             &sirf_audio_codec_regmap_config);
 423         if (IS_ERR(sirf_audio_codec->regmap))
 424                 return PTR_ERR(sirf_audio_codec->regmap);
 425
 426         sirf_audio_codec->clk = devm_clk_get(&pdev->dev, NULL);
 427         if (IS_ERR(sirf_audio_codec->clk)) {
 428                 dev_err(&pdev->dev, "Get clock failed.\n");
 429                 return PTR_ERR(sirf_audio_codec->clk);
 430         }
 431
 432         ret = clk_prepare_enable(sirf_audio_codec->clk);
 433         if (ret) {
 434                 dev_err(&pdev->dev, "Enable clock failed.\n");
 435                 return ret;
 436         }
 437
 438         ret = snd_soc_register_codec(&(pdev->dev),
 439                         &soc_codec_device_sirf_audio_codec,
 440                         &sirf_audio_codec_dai, 1);
 441         if (ret) {
 442                 dev_err(&pdev->dev, "Register Audio Codec dai failed.\n");
 443                 goto err_clk_put;
 444         }
 445
 446         /*
 447          * Always open charge pump, if not, when the charge pump closed the
 448          * adc will not stable
 449          */
 450         regmap_update_bits(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
 451                 IC_CPFREQ, IC_CPFREQ);
 452
 453         if (of_device_is_compatible(pdev->dev.of_node, "sirf,atlas6-audio-codec"))
 454                 regmap_update_bits(sirf_audio_codec->regmap,
 455                                 AUDIO_IC_CODEC_CTRL0, IC_CPEN, IC_CPEN);
 456         return 0;
 457
 458 err_clk_put:
 459         clk_disable_unprepare(sirf_audio_codec->clk);
 460         return ret;
 461 }
 462
 463 static int sirf_audio_codec_driver_remove(struct platform_device *pdev)
 464 {
 465         struct sirf_audio_codec *sirf_audio_codec = platform_get_drvdata(pdev);
 466
 467         clk_disable_unprepare(sirf_audio_codec->clk);
 468         snd_soc_unregister_codec(&(pdev->dev));
 469
 470         return 0;
 471 }
 472
 473 #ifdef CONFIG_PM_SLEEP
 474 static int sirf_audio_codec_suspend(struct device *dev)
 475 {
 476         struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(dev);
 477
 478         regmap_read(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
 479                 &sirf_audio_codec->reg_ctrl0);
 480         regmap_read(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL1,
 481                 &sirf_audio_codec->reg_ctrl1);
 482         clk_disable_unprepare(sirf_audio_codec->clk);
 483
 484         return 0;
 485 }
 486
 487 static int sirf_audio_codec_resume(struct device *dev)
 488 {
 489         struct sirf_audio_codec *sirf_audio_codec = dev_get_drvdata(dev);
 490         int ret;
 491
 492         ret = clk_prepare_enable(sirf_audio_codec->clk);
 493         if (ret)
 494                 return ret;
 495
 496         regmap_write(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL0,
 497                 sirf_audio_codec->reg_ctrl0);
 498         regmap_write(sirf_audio_codec->regmap, AUDIO_IC_CODEC_CTRL1,
 499                 sirf_audio_codec->reg_ctrl1);
 500
 501         return 0;
 502 }
 503 #endif
 504
 505 static const struct dev_pm_ops sirf_audio_codec_pm_ops = {
 506         SET_SYSTEM_SLEEP_PM_OPS(sirf_audio_codec_suspend, sirf_audio_codec_resume)
 507 };
 508
 509 static struct platform_driver sirf_audio_codec_driver = {
 510         .driver = {
 511                 .name = "sirf-audio-codec",
 512                 .owner = THIS_MODULE,
 513                 .of_match_table = sirf_audio_codec_of_match,
 514                 .pm = &sirf_audio_codec_pm_ops,
 515         },
 516         .probe = sirf_audio_codec_driver_probe,
 517         .remove = sirf_audio_codec_driver_remove,
 518 };
 519
 520 module_platform_driver(sirf_audio_codec_driver);
 521
 522 MODULE_DESCRIPTION("SiRF audio codec driver");
 523 MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
 524 MODULE_LICENSE("GPL v2");