kernel/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 <linux/platform_data/asoc-ti-mcbsp.h>
  35
  36 #include "omap-mcbsp.h"
  37
  38 #define OMAP3_PANDORA_DAC_POWER_GPIO    118
  39 #define OMAP3_PANDORA_AMP_POWER_GPIO    14
  40
  41 #define PREFIX "ASoC omap3pandora: "
  42
  43 static struct regulator *omap3pandora_dac_reg;
  44
  45 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
  46         struct snd_pcm_hw_params *params)
  47 {
  48         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  49         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  50         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  51         int ret;
  52
  53         /* Set the codec system clock for DAC and ADC */
  54         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  55                                             SND_SOC_CLOCK_IN);
  56         if (ret < 0) {
  57                 pr_err(PREFIX "can't set codec system clock\n");
  58                 return ret;
  59         }
  60
  61         /* Set McBSP clock to external */
  62         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
  63                                      256 * params_rate(params),
  64                                      SND_SOC_CLOCK_IN);
  65         if (ret < 0) {
  66                 pr_err(PREFIX "can't set cpu system clock\n");
  67                 return ret;
  68         }
  69
  70         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  71         if (ret < 0) {
  72                 pr_err(PREFIX "can't set SRG clock divider\n");
  73                 return ret;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
  80         struct snd_kcontrol *k, int event)
  81 {
  82         int ret;
  83
  84         /*
  85          * The PCM1773 DAC datasheet requires 1ms delay between switching
  86          * VCC power on/off and /PD pin high/low
  87          */
  88         if (SND_SOC_DAPM_EVENT_ON(event)) {
  89                 ret = regulator_enable(omap3pandora_dac_reg);
  90                 if (ret) {
  91                         dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
  92                         return ret;
  93                 }
  94                 mdelay(1);
  95                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
  96         } else {
  97                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
  98                 mdelay(1);
  99                 regulator_disable(omap3pandora_dac_reg);
 100         }
 101
 102         return 0;
 103 }
 104
 105 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 106         struct snd_kcontrol *k, int event)
 107 {
 108         if (SND_SOC_DAPM_EVENT_ON(event))
 109                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 110         else
 111                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 112
 113         return 0;
 114 }
 115
 116 /*
 117  * Audio paths on Pandora board:
 118  *
 119  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 120  *  |M|         A    +--------> Line Out
 121  *  |A| <~~clk~~+
 122  *  |P| <--- TWL4030 <--------- Line In and MICs
 123  */
 124 static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
 125         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 126                            0, 0, omap3pandora_dac_event,
 127                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 128         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 129                            0, 0, NULL, 0, omap3pandora_hp_event,
 130                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 131         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 132         SND_SOC_DAPM_LINE("Line Out", NULL),
 133
 134         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 135         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 136         SND_SOC_DAPM_LINE("Line In", NULL),
 137 };
 138
 139 static const struct snd_soc_dapm_route omap3pandora_map[] = {
 140         {"PCM DAC", NULL, "APLL Enable"},
 141         {"Headphone Amplifier", NULL, "PCM DAC"},
 142         {"Line Out", NULL, "PCM DAC"},
 143         {"Headphone Jack", NULL, "Headphone Amplifier"},
 144
 145         {"AUXL", NULL, "Line In"},
 146         {"AUXR", NULL, "Line In"},
 147
 148         {"MAINMIC", NULL, "Mic (internal)"},
 149         {"Mic (internal)", NULL, "Mic Bias 1"},
 150
 151         {"SUBMIC", NULL, "Mic (external)"},
 152         {"Mic (external)", NULL, "Mic Bias 2"},
 153 };
 154
 155 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 156 {
 157         struct snd_soc_codec *codec = rtd->codec;
 158         struct snd_soc_dapm_context *dapm = &codec->dapm;
 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         return 0;
 173 }
 174
 175 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 176 {
 177         struct snd_soc_codec *codec = rtd->codec;
 178         struct snd_soc_dapm_context *dapm = &codec->dapm;
 179
 180         /* Not comnnected */
 181         snd_soc_dapm_nc_pin(dapm, "HSMIC");
 182         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 183         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 184         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 185
 186         return 0;
 187 }
 188
 189 static struct snd_soc_ops omap3pandora_ops = {
 190         .hw_params = omap3pandora_hw_params,
 191 };
 192
 193 /* Digital audio interface glue - connects codec <--> CPU */
 194 static struct snd_soc_dai_link omap3pandora_dai[] = {
 195         {
 196                 .name = "PCM1773",
 197                 .stream_name = "HiFi Out",
 198                 .cpu_dai_name = "omap-mcbsp.2",
 199                 .codec_dai_name = "twl4030-hifi",
 200                 .platform_name = "omap-mcbsp.2",
 201                 .codec_name = "twl4030-codec",
 202                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 203                            SND_SOC_DAIFMT_CBS_CFS,
 204                 .ops = &omap3pandora_ops,
 205                 .init = omap3pandora_out_init,
 206         }, {
 207                 .name = "TWL4030",
 208                 .stream_name = "Line/Mic In",
 209                 .cpu_dai_name = "omap-mcbsp.4",
 210                 .codec_dai_name = "twl4030-hifi",
 211                 .platform_name = "omap-mcbsp.4",
 212                 .codec_name = "twl4030-codec",
 213                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 214                            SND_SOC_DAIFMT_CBS_CFS,
 215                 .ops = &omap3pandora_ops,
 216                 .init = omap3pandora_in_init,
 217         }
 218 };
 219
 220 /* SoC card */
 221 static struct snd_soc_card snd_soc_card_omap3pandora = {
 222         .name = "omap3pandora",
 223         .owner = THIS_MODULE,
 224         .dai_link = omap3pandora_dai,
 225         .num_links = ARRAY_SIZE(omap3pandora_dai),
 226
 227         .dapm_widgets = omap3pandora_dapm_widgets,
 228         .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
 229         .dapm_routes = omap3pandora_map,
 230         .num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
 231 };
 232
 233 static struct platform_device *omap3pandora_snd_device;
 234
 235 static int __init omap3pandora_soc_init(void)
 236 {
 237         int ret;
 238
 239         if (!machine_is_omap3_pandora())
 240                 return -ENODEV;
 241
 242         pr_info("OMAP3 Pandora SoC init\n");
 243
 244         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 245         if (ret) {
 246                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 247                 return ret;
 248         }
 249
 250         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 251         if (ret) {
 252                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 253                 goto fail0;
 254         }
 255
 256         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 257         if (ret) {
 258                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 259                 goto fail0;
 260         }
 261
 262         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 263         if (ret) {
 264                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 265                 goto fail1;
 266         }
 267
 268         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 269         if (omap3pandora_snd_device == NULL) {
 270                 pr_err(PREFIX "Platform device allocation failed\n");
 271                 ret = -ENOMEM;
 272                 goto fail1;
 273         }
 274
 275         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 276
 277         ret = platform_device_add(omap3pandora_snd_device);
 278         if (ret) {
 279                 pr_err(PREFIX "Unable to add platform device\n");
 280                 goto fail2;
 281         }
 282
 283         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 284         if (IS_ERR(omap3pandora_dac_reg)) {
 285                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 286                         dev_name(&omap3pandora_snd_device->dev),
 287                         PTR_ERR(omap3pandora_dac_reg));
 288                 ret = PTR_ERR(omap3pandora_dac_reg);
 289                 goto fail3;
 290         }
 291
 292         return 0;
 293
 294 fail3:
 295         platform_device_del(omap3pandora_snd_device);
 296 fail2:
 297         platform_device_put(omap3pandora_snd_device);
 298 fail1:
 299         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 300 fail0:
 301         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 302         return ret;
 303 }
 304 module_init(omap3pandora_soc_init);
 305
 306 static void __exit omap3pandora_soc_exit(void)
 307 {
 308         regulator_put(omap3pandora_dac_reg);
 309         platform_device_unregister(omap3pandora_snd_device);
 310         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 311         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 312 }
 313 module_exit(omap3pandora_soc_exit);
 314
 315 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 316 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 317 MODULE_LICENSE("GPL");