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 fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  52                   SND_SOC_DAIFMT_CBS_CFS;
  53         int ret;
  54
  55         /* Set codec DAI configuration */
  56         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  57         if (ret < 0) {
  58                 pr_err(PREFIX "can't set codec DAI configuration\n");
  59                 return ret;
  60         }
  61
  62         /* Set cpu DAI configuration */
  63         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  64         if (ret < 0) {
  65                 pr_err(PREFIX "can't set cpu DAI configuration\n");
  66                 return ret;
  67         }
  68
  69         /* Set the codec system clock for DAC and ADC */
  70         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  71                                             SND_SOC_CLOCK_IN);
  72         if (ret < 0) {
  73                 pr_err(PREFIX "can't set codec system clock\n");
  74                 return ret;
  75         }
  76
  77         /* Set McBSP clock to external */
  78         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
  79                                      256 * params_rate(params),
  80                                      SND_SOC_CLOCK_IN);
  81         if (ret < 0) {
  82                 pr_err(PREFIX "can't set cpu system clock\n");
  83                 return ret;
  84         }
  85
  86         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  87         if (ret < 0) {
  88                 pr_err(PREFIX "can't set SRG clock divider\n");
  89                 return ret;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
  96         struct snd_kcontrol *k, int event)
  97 {
  98         /*
  99          * The PCM1773 DAC datasheet requires 1ms delay between switching
 100          * VCC power on/off and /PD pin high/low
 101          */
 102         if (SND_SOC_DAPM_EVENT_ON(event)) {
 103                 regulator_enable(omap3pandora_dac_reg);
 104                 mdelay(1);
 105                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 106         } else {
 107                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 108                 mdelay(1);
 109                 regulator_disable(omap3pandora_dac_reg);
 110         }
 111
 112         return 0;
 113 }
 114
 115 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 116         struct snd_kcontrol *k, int event)
 117 {
 118         if (SND_SOC_DAPM_EVENT_ON(event))
 119                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 120         else
 121                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 122
 123         return 0;
 124 }
 125
 126 /*
 127  * Audio paths on Pandora board:
 128  *
 129  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 130  *  |M|         A    +--------> Line Out
 131  *  |A| <~~clk~~+
 132  *  |P| <--- TWL4030 <--------- Line In and MICs
 133  */
 134 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 135         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 136                            0, 0, omap3pandora_dac_event,
 137                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 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         {"PCM DAC", NULL, "APLL Enable"},
 153         {"Headphone Amplifier", NULL, "PCM DAC"},
 154         {"Line Out", NULL, "PCM DAC"},
 155         {"Headphone Jack", NULL, "Headphone Amplifier"},
 156 };
 157
 158 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 159         {"AUXL", NULL, "Line In"},
 160         {"AUXR", NULL, "Line In"},
 161
 162         {"MAINMIC", NULL, "Mic Bias 1"},
 163         {"Mic Bias 1", NULL, "Mic (internal)"},
 164
 165         {"SUBMIC", NULL, "Mic Bias 2"},
 166         {"Mic Bias 2", NULL, "Mic (external)"},
 167 };
 168
 169 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 170 {
 171         struct snd_soc_codec *codec = rtd->codec;
 172         struct snd_soc_dapm_context *dapm = &codec->dapm;
 173         int ret;
 174
 175         /* All TWL4030 output pins are floating */
 176         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 177         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 178         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 179         snd_soc_dapm_nc_pin(dapm, "HSOL");
 180         snd_soc_dapm_nc_pin(dapm, "HSOR");
 181         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 182         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 183         snd_soc_dapm_nc_pin(dapm, "HFL");
 184         snd_soc_dapm_nc_pin(dapm, "HFR");
 185         snd_soc_dapm_nc_pin(dapm, "VIBRA");
 186
 187         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
 188                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 189         if (ret < 0)
 190                 return ret;
 191
 192         snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
 193                 ARRAY_SIZE(omap3pandora_out_map));
 194
 195         return snd_soc_dapm_sync(dapm);
 196 }
 197
 198 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 199 {
 200         struct snd_soc_codec *codec = rtd->codec;
 201         struct snd_soc_dapm_context *dapm = &codec->dapm;
 202         int ret;
 203
 204         /* Not comnnected */
 205         snd_soc_dapm_nc_pin(dapm, "HSMIC");
 206         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 207         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 208         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 209
 210         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
 211                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 212         if (ret < 0)
 213                 return ret;
 214
 215         snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
 216                 ARRAY_SIZE(omap3pandora_in_map));
 217
 218         return snd_soc_dapm_sync(dapm);
 219 }
 220
 221 static struct snd_soc_ops omap3pandora_ops = {
 222         .hw_params = omap3pandora_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_name = "omap-mcbsp-dai.1",
 231                 .codec_dai_name = "twl4030-hifi",
 232                 .platform_name = "omap-pcm-audio",
 233                 .codec_name = "twl4030-codec",
 234                 .ops = &omap3pandora_ops,
 235                 .init = omap3pandora_out_init,
 236         }, {
 237                 .name = "TWL4030",
 238                 .stream_name = "Line/Mic In",
 239                 .cpu_dai_name = "omap-mcbsp-dai.3",
 240                 .codec_dai_name = "twl4030-hifi",
 241                 .platform_name = "omap-pcm-audio",
 242                 .codec_name = "twl4030-codec",
 243                 .ops = &omap3pandora_ops,
 244                 .init = omap3pandora_in_init,
 245         }
 246 };
 247
 248 /* SoC card */
 249 static struct snd_soc_card snd_soc_card_omap3pandora = {
 250         .name = "omap3pandora",
 251         .dai_link = omap3pandora_dai,
 252         .num_links = ARRAY_SIZE(omap3pandora_dai),
 253 };
 254
 255 static struct platform_device *omap3pandora_snd_device;
 256
 257 static int __init omap3pandora_soc_init(void)
 258 {
 259         int ret;
 260
 261         if (!machine_is_omap3_pandora())
 262                 return -ENODEV;
 263
 264         pr_info("OMAP3 Pandora SoC init\n");
 265
 266         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 267         if (ret) {
 268                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 269                 return ret;
 270         }
 271
 272         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 273         if (ret) {
 274                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 275                 goto fail0;
 276         }
 277
 278         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 279         if (ret) {
 280                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 281                 goto fail0;
 282         }
 283
 284         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 285         if (ret) {
 286                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 287                 goto fail1;
 288         }
 289
 290         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 291         if (omap3pandora_snd_device == NULL) {
 292                 pr_err(PREFIX "Platform device allocation failed\n");
 293                 ret = -ENOMEM;
 294                 goto fail1;
 295         }
 296
 297         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 298
 299         ret = platform_device_add(omap3pandora_snd_device);
 300         if (ret) {
 301                 pr_err(PREFIX "Unable to add platform device\n");
 302                 goto fail2;
 303         }
 304
 305         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 306         if (IS_ERR(omap3pandora_dac_reg)) {
 307                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 308                         dev_name(&omap3pandora_snd_device->dev),
 309                         PTR_ERR(omap3pandora_dac_reg));
 310                 ret = PTR_ERR(omap3pandora_dac_reg);
 311                 goto fail3;
 312         }
 313
 314         return 0;
 315
 316 fail3:
 317         platform_device_del(omap3pandora_snd_device);
 318 fail2:
 319         platform_device_put(omap3pandora_snd_device);
 320 fail1:
 321         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 322 fail0:
 323         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 324         return ret;
 325 }
 326 module_init(omap3pandora_soc_init);
 327
 328 static void __exit omap3pandora_soc_exit(void)
 329 {
 330         regulator_put(omap3pandora_dac_reg);
 331         platform_device_unregister(omap3pandora_snd_device);
 332         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 333         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 334 }
 335 module_exit(omap3pandora_soc_exit);
 336
 337 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 338 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 339 MODULE_LICENSE("GPL");