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 <linux/platform_data/asoc-ti-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_dac_event(struct snd_soc_dapm_widget *w,
  81         struct snd_kcontrol *k, int event)
  82 {
  83         int ret;
  84
  85         /*
  86          * The PCM1773 DAC datasheet requires 1ms delay between switching
  87          * VCC power on/off and /PD pin high/low
  88          */
  89         if (SND_SOC_DAPM_EVENT_ON(event)) {
  90                 ret = regulator_enable(omap3pandora_dac_reg);
  91                 if (ret) {
  92                         dev_err(w->dapm.dev, "Failed to power DAC: %d\n", ret);
  93                         return ret;
  94                 }
  95                 mdelay(1);
  96                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
  97         } else {
  98                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
  99                 mdelay(1);
 100                 regulator_disable(omap3pandora_dac_reg);
 101         }
 102
 103         return 0;
 104 }
 105
 106 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 107         struct snd_kcontrol *k, int event)
 108 {
 109         if (SND_SOC_DAPM_EVENT_ON(event))
 110                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 111         else
 112                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 113
 114         return 0;
 115 }
 116
 117 /*
 118  * Audio paths on Pandora board:
 119  *
 120  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 121  *  |M|         A    +--------> Line Out
 122  *  |A| <~~clk~~+
 123  *  |P| <--- TWL4030 <--------- Line In and MICs
 124  */
 125 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 126         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 127                            0, 0, omap3pandora_dac_event,
 128                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 129         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 130                            0, 0, NULL, 0, omap3pandora_hp_event,
 131                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 132         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 133         SND_SOC_DAPM_LINE("Line Out", NULL),
 134 };
 135
 136 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 137         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 138         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 139         SND_SOC_DAPM_LINE("Line In", NULL),
 140 };
 141
 142 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 143         {"PCM DAC", NULL, "APLL Enable"},
 144         {"Headphone Amplifier", NULL, "PCM DAC"},
 145         {"Line Out", NULL, "PCM DAC"},
 146         {"Headphone Jack", NULL, "Headphone Amplifier"},
 147 };
 148
 149 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 150         {"AUXL", NULL, "Line In"},
 151         {"AUXR", NULL, "Line In"},
 152
 153         {"MAINMIC", NULL, "Mic (internal)"},
 154         {"Mic (internal)", NULL, "Mic Bias 1"},
 155
 156         {"SUBMIC", NULL, "Mic (external)"},
 157         {"Mic (external)", NULL, "Mic Bias 2"},
 158 };
 159
 160 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 161 {
 162         struct snd_soc_codec *codec = rtd->codec;
 163         struct snd_soc_dapm_context *dapm = &codec->dapm;
 164         int ret;
 165
 166         /* All TWL4030 output pins are floating */
 167         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 168         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 169         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 170         snd_soc_dapm_nc_pin(dapm, "HSOL");
 171         snd_soc_dapm_nc_pin(dapm, "HSOR");
 172         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 173         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 174         snd_soc_dapm_nc_pin(dapm, "HFL");
 175         snd_soc_dapm_nc_pin(dapm, "HFR");
 176         snd_soc_dapm_nc_pin(dapm, "VIBRA");
 177
 178         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
 179                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 180         if (ret < 0)
 181                 return ret;
 182
 183         return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
 184                 ARRAY_SIZE(omap3pandora_out_map));
 185 }
 186
 187 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 188 {
 189         struct snd_soc_codec *codec = rtd->codec;
 190         struct snd_soc_dapm_context *dapm = &codec->dapm;
 191         int ret;
 192
 193         /* Not comnnected */
 194         snd_soc_dapm_nc_pin(dapm, "HSMIC");
 195         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 196         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 197         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 198
 199         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
 200                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 201         if (ret < 0)
 202                 return ret;
 203
 204         return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
 205                 ARRAY_SIZE(omap3pandora_in_map));
 206 }
 207
 208 static struct snd_soc_ops omap3pandora_ops = {
 209         .hw_params = omap3pandora_hw_params,
 210 };
 211
 212 /* Digital audio interface glue - connects codec <--> CPU */
 213 static struct snd_soc_dai_link omap3pandora_dai[] = {
 214         {
 215                 .name = "PCM1773",
 216                 .stream_name = "HiFi Out",
 217                 .cpu_dai_name = "omap-mcbsp.2",
 218                 .codec_dai_name = "twl4030-hifi",
 219                 .platform_name = "omap-pcm-audio",
 220                 .codec_name = "twl4030-codec",
 221                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 222                            SND_SOC_DAIFMT_CBS_CFS,
 223                 .ops = &omap3pandora_ops,
 224                 .init = omap3pandora_out_init,
 225         }, {
 226                 .name = "TWL4030",
 227                 .stream_name = "Line/Mic In",
 228                 .cpu_dai_name = "omap-mcbsp.4",
 229                 .codec_dai_name = "twl4030-hifi",
 230                 .platform_name = "omap-pcm-audio",
 231                 .codec_name = "twl4030-codec",
 232                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 233                            SND_SOC_DAIFMT_CBS_CFS,
 234                 .ops = &omap3pandora_ops,
 235                 .init = omap3pandora_in_init,
 236         }
 237 };
 238
 239 /* SoC card */
 240 static struct snd_soc_card snd_soc_card_omap3pandora = {
 241         .name = "omap3pandora",
 242         .owner = THIS_MODULE,
 243         .dai_link = omap3pandora_dai,
 244         .num_links = ARRAY_SIZE(omap3pandora_dai),
 245 };
 246
 247 static struct platform_device *omap3pandora_snd_device;
 248
 249 static int __init omap3pandora_soc_init(void)
 250 {
 251         int ret;
 252
 253         if (!machine_is_omap3_pandora())
 254                 return -ENODEV;
 255
 256         pr_info("OMAP3 Pandora SoC init\n");
 257
 258         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 259         if (ret) {
 260                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 261                 return ret;
 262         }
 263
 264         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 265         if (ret) {
 266                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 267                 goto fail0;
 268         }
 269
 270         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 271         if (ret) {
 272                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 273                 goto fail0;
 274         }
 275
 276         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 277         if (ret) {
 278                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 279                 goto fail1;
 280         }
 281
 282         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 283         if (omap3pandora_snd_device == NULL) {
 284                 pr_err(PREFIX "Platform device allocation failed\n");
 285                 ret = -ENOMEM;
 286                 goto fail1;
 287         }
 288
 289         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 290
 291         ret = platform_device_add(omap3pandora_snd_device);
 292         if (ret) {
 293                 pr_err(PREFIX "Unable to add platform device\n");
 294                 goto fail2;
 295         }
 296
 297         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 298         if (IS_ERR(omap3pandora_dac_reg)) {
 299                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 300                         dev_name(&omap3pandora_snd_device->dev),
 301                         PTR_ERR(omap3pandora_dac_reg));
 302                 ret = PTR_ERR(omap3pandora_dac_reg);
 303                 goto fail3;
 304         }
 305
 306         return 0;
 307
 308 fail3:
 309         platform_device_del(omap3pandora_snd_device);
 310 fail2:
 311         platform_device_put(omap3pandora_snd_device);
 312 fail1:
 313         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 314 fail0:
 315         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 316         return ret;
 317 }
 318 module_init(omap3pandora_soc_init);
 319
 320 static void __exit omap3pandora_soc_exit(void)
 321 {
 322         regulator_put(omap3pandora_dac_reg);
 323         platform_device_unregister(omap3pandora_snd_device);
 324         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 325         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 326 }
 327 module_exit(omap3pandora_soc_exit);
 328
 329 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 330 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 331 MODULE_LICENSE("GPL");