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 #include <linux/module.h>
  28
  29 #include <sound/core.h>
  30 #include <sound/pcm.h>
  31 #include <sound/soc.h>
  32
  33 #include <asm/mach-types.h>
  34 #include <plat/mcbsp.h>
  35
  36 #include "omap-mcbsp.h"
  37 #include "omap-pcm.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_hw_params(struct snd_pcm_substream *substream,
  47         struct snd_pcm_hw_params *params)
  48 {
  49         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  50         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  51         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  52         int ret;
  53
  54         /* Set the codec system clock for DAC and ADC */
  55         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  56                                             SND_SOC_CLOCK_IN);
  57         if (ret < 0) {
  58                 pr_err(PREFIX "can't set codec system clock\n");
  59                 return ret;
  60         }
  61
  62         /* Set McBSP clock to external */
  63         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
  64                                      256 * params_rate(params),
  65                                      SND_SOC_CLOCK_IN);
  66         if (ret < 0) {
  67                 pr_err(PREFIX "can't set cpu system clock\n");
  68                 return ret;
  69         }
  70
  71         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  72         if (ret < 0) {
  73                 pr_err(PREFIX "can't set SRG clock divider\n");
  74                 return ret;
  75         }
  76
  77         return 0;
  78 }
  79
  80 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
  81         struct snd_kcontrol *k, int event)
  82 {
  83         /*
  84          * The PCM1773 DAC datasheet requires 1ms delay between switching
  85          * VCC power on/off and /PD pin high/low
  86          */
  87         if (SND_SOC_DAPM_EVENT_ON(event)) {
  88                 regulator_enable(omap3pandora_dac_reg);
  89                 mdelay(1);
  90                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
  91         } else {
  92                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
  93                 mdelay(1);
  94                 regulator_disable(omap3pandora_dac_reg);
  95         }
  96
  97         return 0;
  98 }
  99
 100 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 101         struct snd_kcontrol *k, int event)
 102 {
 103         if (SND_SOC_DAPM_EVENT_ON(event))
 104                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 105         else
 106                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 107
 108         return 0;
 109 }
 110
 111 /*
 112  * Audio paths on Pandora board:
 113  *
 114  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 115  *  |M|         A    +--------> Line Out
 116  *  |A| <~~clk~~+
 117  *  |P| <--- TWL4030 <--------- Line In and MICs
 118  */
 119 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 120         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 121                            0, 0, omap3pandora_dac_event,
 122                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 123         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 124                            0, 0, NULL, 0, omap3pandora_hp_event,
 125                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 126         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 127         SND_SOC_DAPM_LINE("Line Out", NULL),
 128 };
 129
 130 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 131         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 132         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 133         SND_SOC_DAPM_LINE("Line In", NULL),
 134 };
 135
 136 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 137         {"PCM DAC", NULL, "APLL Enable"},
 138         {"Headphone Amplifier", NULL, "PCM DAC"},
 139         {"Line Out", NULL, "PCM DAC"},
 140         {"Headphone Jack", NULL, "Headphone Amplifier"},
 141 };
 142
 143 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 144         {"AUXL", NULL, "Line In"},
 145         {"AUXR", NULL, "Line In"},
 146
 147         {"MAINMIC", NULL, "Mic Bias 1"},
 148         {"Mic Bias 1", NULL, "Mic (internal)"},
 149
 150         {"SUBMIC", NULL, "Mic Bias 2"},
 151         {"Mic Bias 2", NULL, "Mic (external)"},
 152 };
 153
 154 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 155 {
 156         struct snd_soc_codec *codec = rtd->codec;
 157         struct snd_soc_dapm_context *dapm = &codec->dapm;
 158         int ret;
 159
 160         /* All TWL4030 output pins are floating */
 161         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 162         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 163         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 164         snd_soc_dapm_nc_pin(dapm, "HSOL");
 165         snd_soc_dapm_nc_pin(dapm, "HSOR");
 166         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 167         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 168         snd_soc_dapm_nc_pin(dapm, "HFL");
 169         snd_soc_dapm_nc_pin(dapm, "HFR");
 170         snd_soc_dapm_nc_pin(dapm, "VIBRA");
 171
 172         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
 173                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 174         if (ret < 0)
 175                 return ret;
 176
 177         return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
 178                 ARRAY_SIZE(omap3pandora_out_map));
 179 }
 180
 181 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 182 {
 183         struct snd_soc_codec *codec = rtd->codec;
 184         struct snd_soc_dapm_context *dapm = &codec->dapm;
 185         int ret;
 186
 187         /* Not comnnected */
 188         snd_soc_dapm_nc_pin(dapm, "HSMIC");
 189         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 190         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 191         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 192
 193         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
 194                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 195         if (ret < 0)
 196                 return ret;
 197
 198         return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
 199                 ARRAY_SIZE(omap3pandora_in_map));
 200 }
 201
 202 static struct snd_soc_ops omap3pandora_ops = {
 203         .hw_params = omap3pandora_hw_params,
 204 };
 205
 206 /* Digital audio interface glue - connects codec <--> CPU */
 207 static struct snd_soc_dai_link omap3pandora_dai[] = {
 208         {
 209                 .name = "PCM1773",
 210                 .stream_name = "HiFi Out",
 211                 .cpu_dai_name = "omap-mcbsp-dai.1",
 212                 .codec_dai_name = "twl4030-hifi",
 213                 .platform_name = "omap-pcm-audio",
 214                 .codec_name = "twl4030-codec",
 215                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 216                            SND_SOC_DAIFMT_CBS_CFS,
 217                 .ops = &omap3pandora_ops,
 218                 .init = omap3pandora_out_init,
 219         }, {
 220                 .name = "TWL4030",
 221                 .stream_name = "Line/Mic In",
 222                 .cpu_dai_name = "omap-mcbsp-dai.3",
 223                 .codec_dai_name = "twl4030-hifi",
 224                 .platform_name = "omap-pcm-audio",
 225                 .codec_name = "twl4030-codec",
 226                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 227                            SND_SOC_DAIFMT_CBS_CFS,
 228                 .ops = &omap3pandora_ops,
 229                 .init = omap3pandora_in_init,
 230         }
 231 };
 232
 233 /* SoC card */
 234 static struct snd_soc_card snd_soc_card_omap3pandora = {
 235         .name = "omap3pandora",
 236         .dai_link = omap3pandora_dai,
 237         .num_links = ARRAY_SIZE(omap3pandora_dai),
 238 };
 239
 240 static struct platform_device *omap3pandora_snd_device;
 241
 242 static int __init omap3pandora_soc_init(void)
 243 {
 244         int ret;
 245
 246         if (!machine_is_omap3_pandora())
 247                 return -ENODEV;
 248
 249         pr_info("OMAP3 Pandora SoC init\n");
 250
 251         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 252         if (ret) {
 253                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 254                 return ret;
 255         }
 256
 257         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 258         if (ret) {
 259                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 260                 goto fail0;
 261         }
 262
 263         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 264         if (ret) {
 265                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 266                 goto fail0;
 267         }
 268
 269         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 270         if (ret) {
 271                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 272                 goto fail1;
 273         }
 274
 275         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 276         if (omap3pandora_snd_device == NULL) {
 277                 pr_err(PREFIX "Platform device allocation failed\n");
 278                 ret = -ENOMEM;
 279                 goto fail1;
 280         }
 281
 282         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 283
 284         ret = platform_device_add(omap3pandora_snd_device);
 285         if (ret) {
 286                 pr_err(PREFIX "Unable to add platform device\n");
 287                 goto fail2;
 288         }
 289
 290         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 291         if (IS_ERR(omap3pandora_dac_reg)) {
 292                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 293                         dev_name(&omap3pandora_snd_device->dev),
 294                         PTR_ERR(omap3pandora_dac_reg));
 295                 ret = PTR_ERR(omap3pandora_dac_reg);
 296                 goto fail3;
 297         }
 298
 299         return 0;
 300
 301 fail3:
 302         platform_device_del(omap3pandora_snd_device);
 303 fail2:
 304         platform_device_put(omap3pandora_snd_device);
 305 fail1:
 306         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 307 fail0:
 308         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 309         return ret;
 310 }
 311 module_init(omap3pandora_soc_init);
 312
 313 static void __exit omap3pandora_soc_exit(void)
 314 {
 315         regulator_put(omap3pandora_dac_reg);
 316         platform_device_unregister(omap3pandora_snd_device);
 317         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 318         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 319 }
 320 module_exit(omap3pandora_soc_exit);
 321
 322 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 323 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 324 MODULE_LICENSE("GPL");