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 #include <sound/soc-dapm.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 fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  53                   SND_SOC_DAIFMT_CBS_CFS;
  54         int ret;
  55
  56         /* Set codec DAI configuration */
  57         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  58         if (ret < 0) {
  59                 pr_err(PREFIX "can't set codec DAI configuration\n");
  60                 return ret;
  61         }
  62
  63         /* Set cpu DAI configuration */
  64         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  65         if (ret < 0) {
  66                 pr_err(PREFIX "can't set cpu DAI configuration\n");
  67                 return ret;
  68         }
  69
  70         /* Set the codec system clock for DAC and ADC */
  71         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  72                                             SND_SOC_CLOCK_IN);
  73         if (ret < 0) {
  74                 pr_err(PREFIX "can't set codec system clock\n");
  75                 return ret;
  76         }
  77
  78         /* Set McBSP clock to external */
  79         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
  80                                      256 * params_rate(params),
  81                                      SND_SOC_CLOCK_IN);
  82         if (ret < 0) {
  83                 pr_err(PREFIX "can't set cpu system clock\n");
  84                 return ret;
  85         }
  86
  87         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  88         if (ret < 0) {
  89                 pr_err(PREFIX "can't set SRG clock divider\n");
  90                 return ret;
  91         }
  92
  93         return 0;
  94 }
  95
  96 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
  97         struct snd_kcontrol *k, int event)
  98 {
  99         /*
 100          * The PCM1773 DAC datasheet requires 1ms delay between switching
 101          * VCC power on/off and /PD pin high/low
 102          */
 103         if (SND_SOC_DAPM_EVENT_ON(event)) {
 104                 regulator_enable(omap3pandora_dac_reg);
 105                 mdelay(1);
 106                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 107         } else {
 108                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 109                 mdelay(1);
 110                 regulator_disable(omap3pandora_dac_reg);
 111         }
 112
 113         return 0;
 114 }
 115
 116 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 117         struct snd_kcontrol *k, int event)
 118 {
 119         if (SND_SOC_DAPM_EVENT_ON(event))
 120                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 121         else
 122                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 123
 124         return 0;
 125 }
 126
 127 /*
 128  * Audio paths on Pandora board:
 129  *
 130  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 131  *  |M|         A    +--------> Line Out
 132  *  |A| <~~clk~~+
 133  *  |P| <--- TWL4030 <--------- Line In and MICs
 134  */
 135 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 136         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 137                            0, 0, omap3pandora_dac_event,
 138                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 139         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 140                            0, 0, NULL, 0, omap3pandora_hp_event,
 141                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 142         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 143         SND_SOC_DAPM_LINE("Line Out", NULL),
 144 };
 145
 146 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 147         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 148         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 149         SND_SOC_DAPM_LINE("Line In", NULL),
 150 };
 151
 152 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 153         {"PCM DAC", NULL, "APLL Enable"},
 154         {"Headphone Amplifier", NULL, "PCM DAC"},
 155         {"Line Out", NULL, "PCM DAC"},
 156         {"Headphone Jack", NULL, "Headphone Amplifier"},
 157 };
 158
 159 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 160         {"AUXL", NULL, "Line In"},
 161         {"AUXR", NULL, "Line In"},
 162
 163         {"MAINMIC", NULL, "Mic Bias 1"},
 164         {"Mic Bias 1", NULL, "Mic (internal)"},
 165
 166         {"SUBMIC", NULL, "Mic Bias 2"},
 167         {"Mic Bias 2", NULL, "Mic (external)"},
 168 };
 169
 170 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 171 {
 172         struct snd_soc_codec *codec = rtd->codec;
 173         int ret;
 174
 175         /* All TWL4030 output pins are floating */
 176         snd_soc_dapm_nc_pin(codec, "EARPIECE");
 177         snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
 178         snd_soc_dapm_nc_pin(codec, "PREDRIVER");
 179         snd_soc_dapm_nc_pin(codec, "HSOL");
 180         snd_soc_dapm_nc_pin(codec, "HSOR");
 181         snd_soc_dapm_nc_pin(codec, "CARKITL");
 182         snd_soc_dapm_nc_pin(codec, "CARKITR");
 183         snd_soc_dapm_nc_pin(codec, "HFL");
 184         snd_soc_dapm_nc_pin(codec, "HFR");
 185         snd_soc_dapm_nc_pin(codec, "VIBRA");
 186
 187         ret = snd_soc_dapm_new_controls(codec, 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(codec, omap3pandora_out_map,
 193                 ARRAY_SIZE(omap3pandora_out_map));
 194
 195         return snd_soc_dapm_sync(codec);
 196 }
 197
 198 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 199 {
 200         struct snd_soc_codec *codec = rtd->codec;
 201         int ret;
 202
 203         /* Not comnnected */
 204         snd_soc_dapm_nc_pin(codec, "HSMIC");
 205         snd_soc_dapm_nc_pin(codec, "CARKITMIC");
 206         snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
 207         snd_soc_dapm_nc_pin(codec, "DIGIMIC1");
 208
 209         ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
 210                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 211         if (ret < 0)
 212                 return ret;
 213
 214         snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
 215                 ARRAY_SIZE(omap3pandora_in_map));
 216
 217         return snd_soc_dapm_sync(codec);
 218 }
 219
 220 static struct snd_soc_ops omap3pandora_ops = {
 221         .hw_params = omap3pandora_hw_params,
 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                 .ops = &omap3pandora_ops,
 234                 .init = omap3pandora_out_init,
 235         }, {
 236                 .name = "TWL4030",
 237                 .stream_name = "Line/Mic In",
 238                 .cpu_dai_name = "omap-mcbsp-dai.3",
 239                 .codec_dai_name = "twl4030-hifi",
 240                 .platform_name = "omap-pcm-audio",
 241                 .codec_name = "twl4030-codec",
 242                 .ops = &omap3pandora_ops,
 243                 .init = omap3pandora_in_init,
 244         }
 245 };
 246
 247 /* SoC card */
 248 static struct snd_soc_card snd_soc_card_omap3pandora = {
 249         .name = "omap3pandora",
 250         .dai_link = omap3pandora_dai,
 251         .num_links = ARRAY_SIZE(omap3pandora_dai),
 252 };
 253
 254 static struct platform_device *omap3pandora_snd_device;
 255
 256 static int __init omap3pandora_soc_init(void)
 257 {
 258         int ret;
 259
 260         if (!machine_is_omap3_pandora())
 261                 return -ENODEV;
 262
 263         pr_info("OMAP3 Pandora SoC init\n");
 264
 265         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 266         if (ret) {
 267                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 268                 return ret;
 269         }
 270
 271         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 272         if (ret) {
 273                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 274                 goto fail0;
 275         }
 276
 277         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 278         if (ret) {
 279                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 280                 goto fail0;
 281         }
 282
 283         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 284         if (ret) {
 285                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 286                 goto fail1;
 287         }
 288
 289         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 290         if (omap3pandora_snd_device == NULL) {
 291                 pr_err(PREFIX "Platform device allocation failed\n");
 292                 ret = -ENOMEM;
 293                 goto fail1;
 294         }
 295
 296         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 297
 298         ret = platform_device_add(omap3pandora_snd_device);
 299         if (ret) {
 300                 pr_err(PREFIX "Unable to add platform device\n");
 301                 goto fail2;
 302         }
 303
 304         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 305         if (IS_ERR(omap3pandora_dac_reg)) {
 306                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 307                         dev_name(&omap3pandora_snd_device->dev),
 308                         PTR_ERR(omap3pandora_dac_reg));
 309                 goto fail3;
 310         }
 311
 312         return 0;
 313
 314 fail3:
 315         platform_device_del(omap3pandora_snd_device);
 316 fail2:
 317         platform_device_put(omap3pandora_snd_device);
 318 fail1:
 319         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 320 fail0:
 321         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 322         return ret;
 323 }
 324 module_init(omap3pandora_soc_init);
 325
 326 static void __exit omap3pandora_soc_exit(void)
 327 {
 328         regulator_put(omap3pandora_dac_reg);
 329         platform_device_unregister(omap3pandora_snd_device);
 330         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 331         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 332 }
 333 module_exit(omap3pandora_soc_exit);
 334
 335 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 336 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 337 MODULE_LICENSE("GPL");