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