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_hw_free(struct snd_pcm_substream *substream)
  81 {
  82         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  83         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  84         int ret;
  85
  86         /* Set McBSP clock back to internal for power saving to work */
  87         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_FCLK,
  88                                      0, SND_SOC_CLOCK_IN);
  89         if (ret < 0) {
  90                 pr_err(PREFIX "can't set cpu system clock\n");
  91                 return ret;
  92         }
  93
  94         return 0;
  95 }
  96
  97 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
  98         struct snd_kcontrol *k, int event)
  99 {
 100         /*
 101          * The PCM1773 DAC datasheet requires 1ms delay between switching
 102          * VCC power on/off and /PD pin high/low
 103          */
 104         if (SND_SOC_DAPM_EVENT_ON(event)) {
 105                 regulator_enable(omap3pandora_dac_reg);
 106                 mdelay(1);
 107                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 108         } else {
 109                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 110                 mdelay(1);
 111                 regulator_disable(omap3pandora_dac_reg);
 112         }
 113
 114         return 0;
 115 }
 116
 117 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 118         struct snd_kcontrol *k, int event)
 119 {
 120         if (SND_SOC_DAPM_EVENT_ON(event))
 121                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 122         else
 123                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 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_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 138                            0, 0, omap3pandora_dac_event,
 139                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 140         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 141                            0, 0, NULL, 0, omap3pandora_hp_event,
 142                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 143         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 144         SND_SOC_DAPM_LINE("Line Out", NULL),
 145 };
 146
 147 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 148         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 149         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 150         SND_SOC_DAPM_LINE("Line In", NULL),
 151 };
 152
 153 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 154         {"PCM DAC", NULL, "APLL Enable"},
 155         {"Headphone Amplifier", NULL, "PCM DAC"},
 156         {"Line Out", NULL, "PCM DAC"},
 157         {"Headphone Jack", NULL, "Headphone Amplifier"},
 158 };
 159
 160 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 161         {"AUXL", NULL, "Line In"},
 162         {"AUXR", NULL, "Line In"},
 163
 164         {"MAINMIC", NULL, "Mic Bias 1"},
 165         {"Mic Bias 1", NULL, "Mic (internal)"},
 166
 167         {"SUBMIC", NULL, "Mic Bias 2"},
 168         {"Mic Bias 2", NULL, "Mic (external)"},
 169 };
 170
 171 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 172 {
 173         struct snd_soc_codec *codec = rtd->codec;
 174         struct snd_soc_dapm_context *dapm = &codec->dapm;
 175         int ret;
 176
 177         /* All TWL4030 output pins are floating */
 178         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 179         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 180         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 181         snd_soc_dapm_nc_pin(dapm, "HSOL");
 182         snd_soc_dapm_nc_pin(dapm, "HSOR");
 183         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 184         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 185         snd_soc_dapm_nc_pin(dapm, "HFL");
 186         snd_soc_dapm_nc_pin(dapm, "HFR");
 187         snd_soc_dapm_nc_pin(dapm, "VIBRA");
 188
 189         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
 190                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 191         if (ret < 0)
 192                 return ret;
 193
 194         return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
 195                 ARRAY_SIZE(omap3pandora_out_map));
 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         return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
 216                 ARRAY_SIZE(omap3pandora_in_map));
 217 }
 218
 219 static struct snd_soc_ops omap3pandora_ops = {
 220         .hw_params = omap3pandora_hw_params,
 221         .hw_free = omap3pandora_hw_free,
 222 };
 223
 224 /* Digital audio interface glue - connects codec <--> CPU */
 225 static struct snd_soc_dai_link omap3pandora_dai[] = {
 226         {
 227                 .name = "PCM1773",
 228                 .stream_name = "HiFi Out",
 229                 .cpu_dai_name = "omap-mcbsp-dai.1",
 230                 .codec_dai_name = "twl4030-hifi",
 231                 .platform_name = "omap-pcm-audio",
 232                 .codec_name = "twl4030-codec",
 233                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 234                            SND_SOC_DAIFMT_CBS_CFS,
 235                 .ops = &omap3pandora_ops,
 236                 .init = omap3pandora_out_init,
 237         }, {
 238                 .name = "TWL4030",
 239                 .stream_name = "Line/Mic In",
 240                 .cpu_dai_name = "omap-mcbsp-dai.3",
 241                 .codec_dai_name = "twl4030-hifi",
 242                 .platform_name = "omap-pcm-audio",
 243                 .codec_name = "twl4030-codec",
 244                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 245                            SND_SOC_DAIFMT_CBS_CFS,
 246                 .ops = &omap3pandora_ops,
 247                 .init = omap3pandora_in_init,
 248         }
 249 };
 250
 251 /* SoC card */
 252 static struct snd_soc_card snd_soc_card_omap3pandora = {
 253         .name = "omap3pandora",
 254         .dai_link = omap3pandora_dai,
 255         .num_links = ARRAY_SIZE(omap3pandora_dai),
 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, &snd_soc_card_omap3pandora);
 301
 302         ret = platform_device_add(omap3pandora_snd_device);
 303         if (ret) {
 304                 pr_err(PREFIX "Unable to add platform device\n");
 305                 goto fail2;
 306         }
 307
 308         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 309         if (IS_ERR(omap3pandora_dac_reg)) {
 310                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 311                         dev_name(&omap3pandora_snd_device->dev),
 312                         PTR_ERR(omap3pandora_dac_reg));
 313                 ret = PTR_ERR(omap3pandora_dac_reg);
 314                 goto fail3;
 315         }
 316
 317         return 0;
 318
 319 fail3:
 320         platform_device_del(omap3pandora_snd_device);
 321 fail2:
 322         platform_device_put(omap3pandora_snd_device);
 323 fail1:
 324         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 325 fail0:
 326         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 327         return ret;
 328 }
 329 module_init(omap3pandora_soc_init);
 330
 331 static void __exit omap3pandora_soc_exit(void)
 332 {
 333         regulator_put(omap3pandora_dac_reg);
 334         platform_device_unregister(omap3pandora_snd_device);
 335         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 336         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 337 }
 338 module_exit(omap3pandora_soc_exit);
 339
 340 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 341 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 342 MODULE_LICENSE("GPL");