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 #include <sound/pcm_params.h>
  33
  34 #include <asm/mach-types.h>
  35 #include <plat/mcbsp.h>
  36
  37 #include "omap-mcbsp.h"
  38 #include "omap-pcm.h"
  39
  40 #define OMAP3_PANDORA_DAC_POWER_GPIO    118
  41 #define OMAP3_PANDORA_AMP_POWER_GPIO    14
  42
  43 #define PREFIX "ASoC omap3pandora: "
  44
  45 static struct regulator *omap3pandora_dac_reg;
  46
  47 static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
  48         struct snd_pcm_hw_params *params)
  49 {
  50         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  51         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  52         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  53         int divider;
  54         int ret;
  55
  56         /* Set the codec system clock for DAC and ADC */
  57         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  58                                             SND_SOC_CLOCK_IN);
  59         if (ret < 0) {
  60                 pr_err(PREFIX "can't set codec system clock\n");
  61                 return ret;
  62         }
  63
  64         /* Set McBSP clock to external */
  65         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
  66                                      256 * params_rate(params),
  67                                      SND_SOC_CLOCK_IN);
  68         if (ret < 0) {
  69                 pr_err(PREFIX "can't set cpu system clock\n");
  70                 return ret;
  71         }
  72
  73         divider = 8;
  74         if (snd_pcm_format_physical_width(params_format(params)) > 16)
  75                 divider = 4;
  76
  77         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, divider);
  78         if (ret < 0) {
  79                 pr_err(PREFIX "can't set SRG clock divider to %d\n", divider);
  80                 return ret;
  81         }
  82
  83         return 0;
  84 }
  85
  86 static int omap3pandora_hw_free(struct snd_pcm_substream *substream)
  87 {
  88         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  89         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  90         int ret;
  91
  92         /* Set McBSP clock back to internal for power saving to work */
  93         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_FCLK,
  94                                      0, SND_SOC_CLOCK_IN);
  95         if (ret < 0) {
  96                 pr_err(PREFIX "can't set cpu system clock\n");
  97                 return ret;
  98         }
  99
 100         return 0;
 101 }
 102
 103 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
 104         struct snd_kcontrol *k, int event)
 105 {
 106         /*
 107          * The PCM1773 DAC datasheet requires 1ms delay between switching
 108          * VCC power on/off and /PD pin high/low
 109          */
 110         if (SND_SOC_DAPM_EVENT_ON(event)) {
 111                 regulator_enable(omap3pandora_dac_reg);
 112                 mdelay(1);
 113                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 114         } else {
 115                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 116                 mdelay(1);
 117                 regulator_disable(omap3pandora_dac_reg);
 118         }
 119
 120         return 0;
 121 }
 122
 123 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 124         struct snd_kcontrol *k, int event)
 125 {
 126         if (SND_SOC_DAPM_EVENT_ON(event))
 127                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 128         else
 129                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 130
 131         return 0;
 132 }
 133
 134 /*
 135  * Audio paths on Pandora board:
 136  *
 137  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
 138  *  |M|         A    +--------> Line Out
 139  *  |A| <~~clk~~+
 140  *  |P| <--- TWL4030 <--------- Line In and MICs
 141  */
 142 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 143         SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
 144                            0, 0, omap3pandora_dac_event,
 145                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 146         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 147                            0, 0, NULL, 0, omap3pandora_hp_event,
 148                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 149         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 150         SND_SOC_DAPM_LINE("Line Out", NULL),
 151 };
 152
 153 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 154         SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 155         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 156         SND_SOC_DAPM_LINE("Line In", NULL),
 157 };
 158
 159 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 160         {"PCM DAC", NULL, "APLL Enable"},
 161         {"Headphone Amplifier", NULL, "PCM DAC"},
 162         {"Line Out", NULL, "PCM DAC"},
 163         {"Headphone Jack", NULL, "Headphone Amplifier"},
 164 };
 165
 166 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 167         {"AUXL", NULL, "Line In"},
 168         {"AUXR", NULL, "Line In"},
 169
 170         {"MAINMIC", NULL, "Mic Bias 1"},
 171         {"Mic Bias 1", NULL, "Mic (internal)"},
 172
 173         {"SUBMIC", NULL, "Mic Bias 2"},
 174         {"Mic Bias 2", NULL, "Mic (external)"},
 175 };
 176
 177 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
 178 {
 179         struct snd_soc_codec *codec = rtd->codec;
 180         struct snd_soc_dapm_context *dapm = &codec->dapm;
 181         int ret;
 182
 183         /* All TWL4030 output pins are floating */
 184         snd_soc_dapm_nc_pin(dapm, "EARPIECE");
 185         snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
 186         snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
 187         snd_soc_dapm_nc_pin(dapm, "HSOL");
 188         snd_soc_dapm_nc_pin(dapm, "HSOR");
 189         snd_soc_dapm_nc_pin(dapm, "CARKITL");
 190         snd_soc_dapm_nc_pin(dapm, "CARKITR");
 191         snd_soc_dapm_nc_pin(dapm, "HFL");
 192         snd_soc_dapm_nc_pin(dapm, "HFR");
 193         snd_soc_dapm_nc_pin(dapm, "VIBRA");
 194
 195         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
 196                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 197         if (ret < 0)
 198                 return ret;
 199
 200         return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
 201                 ARRAY_SIZE(omap3pandora_out_map));
 202 }
 203
 204 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
 205 {
 206         struct snd_soc_codec *codec = rtd->codec;
 207         struct snd_soc_dapm_context *dapm = &codec->dapm;
 208         int ret;
 209
 210         /* Not comnnected */
 211         snd_soc_dapm_nc_pin(dapm, "HSMIC");
 212         snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
 213         snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
 214         snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
 215
 216         ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
 217                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 218         if (ret < 0)
 219                 return ret;
 220
 221         return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
 222                 ARRAY_SIZE(omap3pandora_in_map));
 223 }
 224
 225 static struct snd_soc_ops omap3pandora_ops = {
 226         .hw_params = omap3pandora_hw_params,
 227         .hw_free = omap3pandora_hw_free,
 228 };
 229
 230 /* Digital audio interface glue - connects codec <--> CPU */
 231 static struct snd_soc_dai_link omap3pandora_dai[] = {
 232         {
 233                 .name = "PCM1773",
 234                 .stream_name = "HiFi Out",
 235                 .cpu_dai_name = "omap-mcbsp-dai.1",
 236                 .codec_dai_name = "twl4030-hifi",
 237                 .platform_name = "omap-pcm-audio",
 238                 .codec_name = "twl4030-codec",
 239                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 240                            SND_SOC_DAIFMT_CBS_CFS,
 241                 .ops = &omap3pandora_ops,
 242                 .init = omap3pandora_out_init,
 243         }, {
 244                 .name = "TWL4030",
 245                 .stream_name = "Line/Mic In",
 246                 .cpu_dai_name = "omap-mcbsp-dai.3",
 247                 .codec_dai_name = "twl4030-hifi",
 248                 .platform_name = "omap-pcm-audio",
 249                 .codec_name = "twl4030-codec",
 250                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 251                            SND_SOC_DAIFMT_CBS_CFS,
 252                 .ops = &omap3pandora_ops,
 253                 .init = omap3pandora_in_init,
 254         }
 255 };
 256
 257 /* SoC card */
 258 static struct snd_soc_card snd_soc_card_omap3pandora = {
 259         .name = "omap3pandora",
 260         .dai_link = omap3pandora_dai,
 261         .num_links = ARRAY_SIZE(omap3pandora_dai),
 262 };
 263
 264 static struct platform_device *omap3pandora_snd_device;
 265
 266 static int __init omap3pandora_soc_init(void)
 267 {
 268         int ret;
 269
 270         if (!machine_is_omap3_pandora())
 271                 return -ENODEV;
 272
 273         pr_info("OMAP3 Pandora SoC init\n");
 274
 275         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 276         if (ret) {
 277                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 278                 return ret;
 279         }
 280
 281         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 282         if (ret) {
 283                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 284                 goto fail0;
 285         }
 286
 287         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 288         if (ret) {
 289                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 290                 goto fail0;
 291         }
 292
 293         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 294         if (ret) {
 295                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 296                 goto fail1;
 297         }
 298
 299         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 300         if (omap3pandora_snd_device == NULL) {
 301                 pr_err(PREFIX "Platform device allocation failed\n");
 302                 ret = -ENOMEM;
 303                 goto fail1;
 304         }
 305
 306         platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
 307
 308         ret = platform_device_add(omap3pandora_snd_device);
 309         if (ret) {
 310                 pr_err(PREFIX "Unable to add platform device\n");
 311                 goto fail2;
 312         }
 313
 314         omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
 315         if (IS_ERR(omap3pandora_dac_reg)) {
 316                 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
 317                         dev_name(&omap3pandora_snd_device->dev),
 318                         PTR_ERR(omap3pandora_dac_reg));
 319                 ret = PTR_ERR(omap3pandora_dac_reg);
 320                 goto fail3;
 321         }
 322
 323         return 0;
 324
 325 fail3:
 326         platform_device_del(omap3pandora_snd_device);
 327 fail2:
 328         platform_device_put(omap3pandora_snd_device);
 329 fail1:
 330         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 331 fail0:
 332         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 333         return ret;
 334 }
 335 module_init(omap3pandora_soc_init);
 336
 337 static void __exit omap3pandora_soc_exit(void)
 338 {
 339         regulator_put(omap3pandora_dac_reg);
 340         platform_device_unregister(omap3pandora_snd_device);
 341         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 342         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 343 }
 344 module_exit(omap3pandora_soc_exit);
 345
 346 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 347 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 348 MODULE_LICENSE("GPL");