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
  27 #include <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/soc.h>
  30 #include <sound/soc-dapm.h>
  31
  32 #include <asm/mach-types.h>
  33
  34 #include "omap-mcbsp.h"
  35 #include "omap-pcm.h"
  36 #include "../codecs/twl4030.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 int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
  44         struct snd_soc_dai *cpu_dai, unsigned int fmt)
  45 {
  46         int ret;
  47
  48         /* Set codec DAI configuration */
  49         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  50         if (ret < 0) {
  51                 pr_err(PREFIX "can't set codec DAI configuration\n");
  52                 return ret;
  53         }
  54
  55         /* Set cpu DAI configuration */
  56         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  57         if (ret < 0) {
  58                 pr_err(PREFIX "can't set cpu DAI configuration\n");
  59                 return ret;
  60         }
  61
  62         /* Set the codec system clock for DAC and ADC */
  63         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  64                                             SND_SOC_CLOCK_IN);
  65         if (ret < 0) {
  66                 pr_err(PREFIX "can't set codec system clock\n");
  67                 return ret;
  68         }
  69
  70         /* Set McBSP clock to external */
  71         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 0,
  72                                             SND_SOC_CLOCK_IN);
  73         if (ret < 0) {
  74                 pr_err(PREFIX "can't set cpu system clock\n");
  75                 return ret;
  76         }
  77
  78         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  79         if (ret < 0) {
  80                 pr_err(PREFIX "can't set SRG clock divider\n");
  81                 return ret;
  82         }
  83
  84         return 0;
  85 }
  86
  87 static int omap3pandora_out_hw_params(struct snd_pcm_substream *substream,
  88         struct snd_pcm_hw_params *params)
  89 {
  90         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  91         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  92         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  93
  94         return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
  95                                           SND_SOC_DAIFMT_I2S |
  96                                           SND_SOC_DAIFMT_IB_NF |
  97                                           SND_SOC_DAIFMT_CBS_CFS);
  98 }
  99
 100 static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
 101         struct snd_pcm_hw_params *params)
 102 {
 103         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 104         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 105         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 106
 107         return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
 108                                           SND_SOC_DAIFMT_I2S |
 109                                           SND_SOC_DAIFMT_NB_NF |
 110                                           SND_SOC_DAIFMT_CBS_CFS);
 111 }
 112
 113 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 114         struct snd_kcontrol *k, int event)
 115 {
 116         if (SND_SOC_DAPM_EVENT_ON(event)) {
 117                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 118                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 119         } else {
 120                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 121                 mdelay(1);
 122                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 123         }
 124
 125         return 0;
 126 }
 127
 128 /*
 129  * Audio paths on Pandora board:
 130  *
 131  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 132  *  |M|         A    +--------> Line Out
 133  *  |A| <~~clk~~+
 134  *  |P| <--- TWL4030 <--------- Line In and MICs
 135  */
 136 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 137         SND_SOC_DAPM_DAC("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
 138         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 139                            0, 0, NULL, 0, omap3pandora_hp_event,
 140                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 141         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 142         SND_SOC_DAPM_LINE("Line Out", NULL),
 143 };
 144
 145 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 146         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 147         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 148         SND_SOC_DAPM_LINE("Line In", NULL),
 149 };
 150
 151 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 152         {"Headphone Amplifier", NULL, "PCM DAC"},
 153         {"Line Out", NULL, "PCM DAC"},
 154         {"Headphone Jack", NULL, "Headphone Amplifier"},
 155 };
 156
 157 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 158         {"AUXL", NULL, "Line In"},
 159         {"AUXR", NULL, "Line In"},
 160
 161         {"MAINMIC", NULL, "Mic Bias 1"},
 162         {"Mic Bias 1", NULL, "Mic (internal)"},
 163
 164         {"SUBMIC", NULL, "Mic Bias 2"},
 165         {"Mic Bias 2", NULL, "Mic (external)"},
 166 };
 167
 168 static int omap3pandora_out_init(struct snd_soc_codec *codec)
 169 {
 170         int ret;
 171
 172         /* All TWL4030 output pins are floating */
 173         snd_soc_dapm_nc_pin(codec, "OUTL");
 174         snd_soc_dapm_nc_pin(codec, "OUTR");
 175         snd_soc_dapm_nc_pin(codec, "EARPIECE");
 176         snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
 177         snd_soc_dapm_nc_pin(codec, "PREDRIVER");
 178         snd_soc_dapm_nc_pin(codec, "HSOL");
 179         snd_soc_dapm_nc_pin(codec, "HSOR");
 180         snd_soc_dapm_nc_pin(codec, "CARKITL");
 181         snd_soc_dapm_nc_pin(codec, "CARKITR");
 182         snd_soc_dapm_nc_pin(codec, "HFL");
 183         snd_soc_dapm_nc_pin(codec, "HFR");
 184
 185         ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
 186                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 187         if (ret < 0)
 188                 return ret;
 189
 190         snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
 191                 ARRAY_SIZE(omap3pandora_out_map));
 192
 193         return snd_soc_dapm_sync(codec);
 194 }
 195
 196 static int omap3pandora_in_init(struct snd_soc_codec *codec)
 197 {
 198         int ret;
 199
 200         /* Not comnnected */
 201         snd_soc_dapm_nc_pin(codec, "HSMIC");
 202         snd_soc_dapm_nc_pin(codec, "CARKITMIC");
 203         snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
 204         snd_soc_dapm_nc_pin(codec, "DIGIMIC1");
 205
 206         ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
 207                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 208         if (ret < 0)
 209                 return ret;
 210
 211         snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
 212                 ARRAY_SIZE(omap3pandora_in_map));
 213
 214         return snd_soc_dapm_sync(codec);
 215 }
 216
 217 static struct snd_soc_ops omap3pandora_out_ops = {
 218         .hw_params = omap3pandora_out_hw_params,
 219 };
 220
 221 static struct snd_soc_ops omap3pandora_in_ops = {
 222         .hw_params = omap3pandora_in_hw_params,
 223 };
 224
 225 /* Digital audio interface glue - connects codec <--> CPU */
 226 static struct snd_soc_dai_link omap3pandora_dai[] = {
 227         {
 228                 .name = "PCM1773",
 229                 .stream_name = "HiFi Out",
 230                 .cpu_dai = &omap_mcbsp_dai[0],
 231                 .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
 232                 .ops = &omap3pandora_out_ops,
 233                 .init = omap3pandora_out_init,
 234         }, {
 235                 .name = "TWL4030",
 236                 .stream_name = "Line/Mic In",
 237                 .cpu_dai = &omap_mcbsp_dai[1],
 238                 .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
 239                 .ops = &omap3pandora_in_ops,
 240                 .init = omap3pandora_in_init,
 241         }
 242 };
 243
 244 /* SoC card */
 245 static struct snd_soc_card snd_soc_card_omap3pandora = {
 246         .name = "omap3pandora",
 247         .platform = &omap_soc_platform,
 248         .dai_link = omap3pandora_dai,
 249         .num_links = ARRAY_SIZE(omap3pandora_dai),
 250 };
 251
 252 /* Audio subsystem */
 253 static struct snd_soc_device omap3pandora_snd_data = {
 254         .card = &snd_soc_card_omap3pandora,
 255         .codec_dev = &soc_codec_dev_twl4030,
 256 };
 257
 258 static struct platform_device *omap3pandora_snd_device;
 259
 260 static int __init omap3pandora_soc_init(void)
 261 {
 262         int ret;
 263
 264         if (!machine_is_omap3_pandora())
 265                 return -ENODEV;
 266
 267         pr_info("OMAP3 Pandora SoC init\n");
 268
 269         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 270         if (ret) {
 271                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 272                 return ret;
 273         }
 274
 275         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 276         if (ret) {
 277                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 278                 goto fail0;
 279         }
 280
 281         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 282         if (ret) {
 283                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 284                 goto fail0;
 285         }
 286
 287         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 288         if (ret) {
 289                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 290                 goto fail1;
 291         }
 292
 293         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 294         if (omap3pandora_snd_device == NULL) {
 295                 pr_err(PREFIX "Platform device allocation failed\n");
 296                 ret = -ENOMEM;
 297                 goto fail1;
 298         }
 299
 300         platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
 301         omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
 302         *(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
 303         *(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */
 304
 305         ret = platform_device_add(omap3pandora_snd_device);
 306         if (ret) {
 307                 pr_err(PREFIX "Unable to add platform device\n");
 308                 goto fail2;
 309         }
 310
 311         return 0;
 312
 313 fail2:
 314         platform_device_put(omap3pandora_snd_device);
 315 fail1:
 316         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 317 fail0:
 318         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 319         return ret;
 320 }
 321 module_init(omap3pandora_soc_init);
 322
 323 static void __exit omap3pandora_soc_exit(void)
 324 {
 325         platform_device_unregister(omap3pandora_snd_device);
 326         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 327         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 328 }
 329 module_exit(omap3pandora_soc_exit);
 330
 331 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 332 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 333 MODULE_LICENSE("GPL");