sound/soc/omap/omap3pandora.c

   1 /*
   2  * omap3pandora.c  --  SoC audio for Pandora Handheld Console
   3  *
   4  * Author: Gražvydas Ignotas <notasas@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/clk.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/gpio.h>
  25 #include <linux/delay.h>
  26 #include <linux/regulator/consumer.h>
  27
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/soc.h>
  31 #include <sound/soc-dapm.h>
  32
  33 #include <asm/mach-types.h>
  34
  35 #include "omap-mcbsp.h"
  36 #include "omap-pcm.h"
  37 #include "../codecs/twl4030.h"
  38
  39 #define OMAP3_PANDORA_DAC_POWER_GPIO    118
  40 #define OMAP3_PANDORA_AMP_POWER_GPIO    14
  41
  42 #define PREFIX "ASoC omap3pandora: "
  43
  44 static struct regulator *omap3pandora_dac_reg;
  45
  46 static int omap3pandora_cmn_hw_params(struct snd_pcm_substream *substream,
  47         struct snd_pcm_hw_params *params, unsigned int fmt)
  48 {
  49         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  50         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  51         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  52         int ret;
  53
  54         /* Set codec DAI configuration */
  55         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  56         if (ret < 0) {
  57                 pr_err(PREFIX "can't set codec DAI configuration\n");
  58                 return ret;
  59         }
  60
  61         /* Set cpu DAI configuration */
  62         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  63         if (ret < 0) {
  64                 pr_err(PREFIX "can't set cpu DAI configuration\n");
  65                 return ret;
  66         }
  67
  68         /* Set the codec system clock for DAC and ADC */
  69         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  70                                             SND_SOC_CLOCK_IN);
  71         if (ret < 0) {
  72                 pr_err(PREFIX "can't set codec system clock\n");
  73                 return ret;
  74         }
  75
  76         /* Set McBSP clock to external */
  77         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
  78                                      256 * params_rate(params),
  79                                      SND_SOC_CLOCK_IN);
  80         if (ret < 0) {
  81                 pr_err(PREFIX "can't set cpu system clock\n");
  82                 return ret;
  83         }
  84
  85         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  86         if (ret < 0) {
  87                 pr_err(PREFIX "can't set SRG clock divider\n");
  88                 return ret;
  89         }
  90
  91         return 0;
  92 }
  93
  94 static int omap3pandora_out_hw_params(struct snd_pcm_substream *substream,
  95         struct snd_pcm_hw_params *params)
  96 {
  97         return omap3pandora_cmn_hw_params(substream, params,
  98                                           SND_SOC_DAIFMT_I2S |
  99                                           SND_SOC_DAIFMT_IB_NF |
 100                                           SND_SOC_DAIFMT_CBS_CFS);
 101 }
 102
 103 static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
 104         struct snd_pcm_hw_params *params)
 105 {
 106         return omap3pandora_cmn_hw_params(substream, params,
 107                                           SND_SOC_DAIFMT_I2S |
 108                                           SND_SOC_DAIFMT_NB_NF |
 109                                           SND_SOC_DAIFMT_CBS_CFS);
 110 }
 111
 112 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
 113         struct snd_kcontrol *k, int event)
 114 {
 115         /*
 116          * The PCM1773 DAC datasheet requires 1ms delay between switching
 117          * VCC power on/off and /PD pin high/low
 118          */
 119         if (SND_SOC_DAPM_EVENT_ON(event)) {
 120                 regulator_enable(omap3pandora_dac_reg);
 121                 mdelay(1);
 122                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 123         } else {
 124                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 125                 mdelay(1);
 126                 regulator_disable(omap3pandora_dac_reg);
 127         }
 128
 129         return 0;
 130 }
 131
 132 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 133         struct snd_kcontrol *k, int event)
 134 {
 135         if (SND_SOC_DAPM_EVENT_ON(event))
 136                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 137         else
 138                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 139
 140         return 0;
 141 }
 142
 143 /*
 144  * Audio paths on Pandora board:
 145  *
 146  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 147  *  |M|         A    +--------> Line Out
 148  *  |A| <~~clk~~+
 149  *  |P| <--- TWL4030 <--------- Line In and MICs
 150  */
 151 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 152         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 153                            0, 0, omap3pandora_dac_event,
 154                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 155         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 156                            0, 0, NULL, 0, omap3pandora_hp_event,
 157                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 158         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 159         SND_SOC_DAPM_LINE("Line Out", NULL),
 160 };
 161
 162 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 163         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 164         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 165         SND_SOC_DAPM_LINE("Line In", NULL),
 166 };
 167
 168 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 169         {"PCM DAC", NULL, "APLL Enable"},
 170         {"Headphone Amplifier", NULL, "PCM DAC"},
 171         {"Line Out", NULL, "PCM DAC"},
 172         {"Headphone Jack", NULL, "Headphone Amplifier"},
 173 };
 174
 175 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 176         {"AUXL", NULL, "Line In"},
 177         {"AUXR", NULL, "Line In"},
 178
 179         {"MAINMIC", NULL, "Mic Bias 1"},
 180         {"Mic Bias 1", NULL, "Mic (internal)"},
 181
 182         {"SUBMIC", NULL, "Mic Bias 2"},
 183         {"Mic Bias 2", NULL, "Mic (external)"},
 184 };
 185
 186 static int omap3pandora_out_init(struct snd_soc_codec *codec)
 187 {
 188         int ret;
 189
 190         /* All TWL4030 output pins are floating */
 191         snd_soc_dapm_nc_pin(codec, "OUTL");
 192         snd_soc_dapm_nc_pin(codec, "OUTR");
 193         snd_soc_dapm_nc_pin(codec, "EARPIECE");
 194         snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
 195         snd_soc_dapm_nc_pin(codec, "PREDRIVER");
 196         snd_soc_dapm_nc_pin(codec, "HSOL");
 197         snd_soc_dapm_nc_pin(codec, "HSOR");
 198         snd_soc_dapm_nc_pin(codec, "CARKITL");
 199         snd_soc_dapm_nc_pin(codec, "CARKITR");
 200         snd_soc_dapm_nc_pin(codec, "HFL");
 201         snd_soc_dapm_nc_pin(codec, "HFR");
 202         snd_soc_dapm_nc_pin(codec, "VIBRA");
 203
 204         ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
 205                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 206         if (ret < 0)
 207                 return ret;
 208
 209         snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
 210                 ARRAY_SIZE(omap3pandora_out_map));
 211
 212         return snd_soc_dapm_sync(codec);
 213 }
 214
 215 static int omap3pandora_in_init(struct snd_soc_codec *codec)
 216 {
 217         int ret;
 218
 219         /* Not comnnected */
 220         snd_soc_dapm_nc_pin(codec, "HSMIC");
 221         snd_soc_dapm_nc_pin(codec, "CARKITMIC");
 222         snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
 223         snd_soc_dapm_nc_pin(codec, "DIGIMIC1");
 224
 225         ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
 226                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 227         if (ret < 0)
 228                 return ret;
 229
 230         snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
 231                 ARRAY_SIZE(omap3pandora_in_map));
 232
 233         return snd_soc_dapm_sync(codec);
 234 }
 235
 236 static struct snd_soc_ops omap3pandora_out_ops = {
 237         .hw_params = omap3pandora_out_hw_params,
 238 };
 239
 240 static struct snd_soc_ops omap3pandora_in_ops = {
 241         .hw_params = omap3pandora_in_hw_params,
 242 };
 243
 244 /* Digital audio interface glue - connects codec <--> CPU */
 245 static struct snd_soc_dai_link omap3pandora_dai[] = {
 246         {
 247                 .name = "PCM1773",
 248                 .stream_name = "HiFi Out",
 249                 .cpu_dai = &omap_mcbsp_dai[0],
 250                 .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
 251                 .ops = &omap3pandora_out_ops,
 252                 .init = omap3pandora_out_init,
 253         }, {
 254                 .name = "TWL4030",
 255                 .stream_name = "Line/Mic In",
 256                 .cpu_dai = &omap_mcbsp_dai[1],
 257                 .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
 258                 .ops = &omap3pandora_in_ops,
 259                 .init = omap3pandora_in_init,
 260         }
 261 };
 262
 263 /* SoC card */
 264 static struct snd_soc_card snd_soc_card_omap3pandora = {
 265         .name = "omap3pandora",
 266         .platform = &omap_soc_platform,
 267         .dai_link = omap3pandora_dai,
 268         .num_links = ARRAY_SIZE(omap3pandora_dai),
 269 };
 270
 271 /* Audio subsystem */
 272 static struct snd_soc_device omap3pandora_snd_data = {
 273         .card = &snd_soc_card_omap3pandora,
 274         .codec_dev = &soc_codec_dev_twl4030,
 275 };
 276
 277 static struct platform_device *omap3pandora_snd_device;
 278
 279 static int __init omap3pandora_soc_init(void)
 280 {
 281         int ret;
 282
 283         if (!machine_is_omap3_pandora())
 284                 return -ENODEV;
 285
 286         pr_info("OMAP3 Pandora SoC init\n");
 287
 288         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 289         if (ret) {
 290                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 291                 return ret;
 292         }
 293
 294         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 295         if (ret) {
 296                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 297                 goto fail0;
 298         }
 299
 300         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 301         if (ret) {
 302                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 303                 goto fail0;
 304         }
 305
 306         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 307         if (ret) {
 308                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 309                 goto fail1;
 310         }
 311
 312         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 313         if (omap3pandora_snd_device == NULL) {
 314                 pr_err(PREFIX "Platform device allocation failed\n");
 315                 ret = -ENOMEM;
 316                 goto fail1;
 317         }
 318
 319         platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
 320         omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
 321         *(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
 322         *(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */
 323
 324         ret = platform_device_add(omap3pandora_snd_device);
 325         if (ret) {
 326                 pr_err(PREFIX "Unable to add platform device\n");
 327                 goto fail2;
 328         }
 329
 330         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 331         if (IS_ERR(omap3pandora_dac_reg)) {
 332                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 333                         dev_name(&omap3pandora_snd_device->dev),
 334                         PTR_ERR(omap3pandora_dac_reg));
 335                 goto fail3;
 336         }
 337
 338         return 0;
 339
 340 fail3:
 341         platform_device_del(omap3pandora_snd_device);
 342 fail2:
 343         platform_device_put(omap3pandora_snd_device);
 344 fail1:
 345         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 346 fail0:
 347         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 348         return ret;
 349 }
 350 module_init(omap3pandora_soc_init);
 351
 352 static void __exit omap3pandora_soc_exit(void)
 353 {
 354         regulator_put(omap3pandora_dac_reg);
 355         platform_device_unregister(omap3pandora_snd_device);
 356         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 357         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 358 }
 359 module_exit(omap3pandora_soc_exit);
 360
 361 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 362 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 363 MODULE_LICENSE("GPL");