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         struct snd_soc_dapm_context *dapm = &codec->dapm;
 174         int ret;
 175
 176         /* All TWL4030 output pins are floating */
 177         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 178         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 179         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 180         snd_soc_dapm_nc_pin(dapm, "HSOL");
 181         snd_soc_dapm_nc_pin(dapm, "HSOR");
 182         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 183         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 184         snd_soc_dapm_nc_pin(dapm, "HFL");
 185         snd_soc_dapm_nc_pin(dapm, "HFR");
 186         snd_soc_dapm_nc_pin(dapm, "VIBRA");
 187
 188         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
 189                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 190         if (ret < 0)
 191                 return ret;
 192
 193         snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
 194                 ARRAY_SIZE(omap3pandora_out_map));
 195
 196         return snd_soc_dapm_sync(dapm);
 197 }
 198
 199 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 200 {
 201         struct snd_soc_codec *codec = rtd->codec;
 202         struct snd_soc_dapm_context *dapm = &codec->dapm;
 203         int ret;
 204
 205         /* Not comnnected */
 206         snd_soc_dapm_nc_pin(dapm, "HSMIC");
 207         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 208         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 209         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 210
 211         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
 212                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 213         if (ret < 0)
 214                 return ret;
 215
 216         snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
 217                 ARRAY_SIZE(omap3pandora_in_map));
 218
 219         return snd_soc_dapm_sync(dapm);
 220 }
 221
 222 static struct snd_soc_ops omap3pandora_ops = {
 223         .hw_params = omap3pandora_hw_params,
 224 };
 225
 226 /* Digital audio interface glue - connects codec <--> CPU */
 227 static struct snd_soc_dai_link omap3pandora_dai[] = {
 228         {
 229                 .name = "PCM1773",
 230                 .stream_name = "HiFi Out",
 231                 .cpu_dai_name = "omap-mcbsp-dai.1",
 232                 .codec_dai_name = "twl4030-hifi",
 233                 .platform_name = "omap-pcm-audio",
 234                 .codec_name = "twl4030-codec",
 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                 .ops = &omap3pandora_ops,
 245                 .init = omap3pandora_in_init,
 246         }
 247 };
 248
 249 /* SoC card */
 250 static struct snd_soc_card snd_soc_card_omap3pandora = {
 251         .name = "omap3pandora",
 252         .dai_link = omap3pandora_dai,
 253         .num_links = ARRAY_SIZE(omap3pandora_dai),
 254 };
 255
 256 static struct platform_device *omap3pandora_snd_device;
 257
 258 static int __init omap3pandora_soc_init(void)
 259 {
 260         int ret;
 261
 262         if (!machine_is_omap3_pandora())
 263                 return -ENODEV;
 264
 265         pr_info("OMAP3 Pandora SoC init\n");
 266
 267         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 268         if (ret) {
 269                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 270                 return ret;
 271         }
 272
 273         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 274         if (ret) {
 275                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 276                 goto fail0;
 277         }
 278
 279         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 280         if (ret) {
 281                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 282                 goto fail0;
 283         }
 284
 285         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 286         if (ret) {
 287                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 288                 goto fail1;
 289         }
 290
 291         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 292         if (omap3pandora_snd_device == NULL) {
 293                 pr_err(PREFIX "Platform device allocation failed\n");
 294                 ret = -ENOMEM;
 295                 goto fail1;
 296         }
 297
 298         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 299
 300         ret = platform_device_add(omap3pandora_snd_device);
 301         if (ret) {
 302                 pr_err(PREFIX "Unable to add platform device\n");
 303                 goto fail2;
 304         }
 305
 306         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 307         if (IS_ERR(omap3pandora_dac_reg)) {
 308                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 309                         dev_name(&omap3pandora_snd_device->dev),
 310                         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");