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
  27 #include <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/soc.h>
  30 #include <sound/soc-dapm.h>
  31
  32 #include <asm/mach-types.h>
  33
  34 #include "omap-mcbsp.h"
  35 #include "omap-pcm.h"
  36 #include "../codecs/twl4030.h"
  37
  38 #define OMAP3_PANDORA_DAC_POWER_GPIO    118
  39 #define OMAP3_PANDORA_AMP_POWER_GPIO    14
  40
  41 #define PREFIX "ASoC omap3pandora: "
  42
  43 static int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
  44         struct snd_soc_dai *cpu_dai, unsigned int fmt)
  45 {
  46         int ret;
  47
  48         /* Set codec DAI configuration */
  49         ret = snd_soc_dai_set_fmt(codec_dai, fmt);
  50         if (ret < 0) {
  51                 pr_err(PREFIX "can't set codec DAI configuration\n");
  52                 return ret;
  53         }
  54
  55         /* Set cpu DAI configuration */
  56         ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
  57         if (ret < 0) {
  58                 pr_err(PREFIX "can't set cpu DAI configuration\n");
  59                 return ret;
  60         }
  61
  62         /* Set the codec system clock for DAC and ADC */
  63         ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
  64                                             SND_SOC_CLOCK_IN);
  65         if (ret < 0) {
  66                 pr_err(PREFIX "can't set codec system clock\n");
  67                 return ret;
  68         }
  69
  70         /* Set McBSP clock to external */
  71         ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 0,
  72                                             SND_SOC_CLOCK_IN);
  73         if (ret < 0) {
  74                 pr_err(PREFIX "can't set cpu system clock\n");
  75                 return ret;
  76         }
  77
  78         ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
  79         if (ret < 0) {
  80                 pr_err(PREFIX "can't set SRG clock divider\n");
  81                 return ret;
  82         }
  83
  84         return 0;
  85 }
  86
  87 static int omap3pandora_out_hw_params(struct snd_pcm_substream *substream,
  88         struct snd_pcm_hw_params *params)
  89 {
  90         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  91         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  92         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  93
  94         return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
  95                                           SND_SOC_DAIFMT_I2S |
  96                                           SND_SOC_DAIFMT_IB_NF |
  97                                           SND_SOC_DAIFMT_CBS_CFS);
  98 }
  99
 100 static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
 101         struct snd_pcm_hw_params *params)
 102 {
 103         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 104         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 105         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 106
 107         return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
 108                                           SND_SOC_DAIFMT_I2S |
 109                                           SND_SOC_DAIFMT_NB_NF |
 110                                           SND_SOC_DAIFMT_CBS_CFS);
 111 }
 112
 113 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 114         struct snd_kcontrol *k, int event)
 115 {
 116         if (SND_SOC_DAPM_EVENT_ON(event)) {
 117                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 118                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 119         } else {
 120                 gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 121                 mdelay(1);
 122                 gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 123         }
 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("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
 138         SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 139                            0, 0, NULL, 0, omap3pandora_hp_event,
 140                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 141         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 142         SND_SOC_DAPM_LINE("Line Out", NULL),
 143 };
 144
 145 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 146         SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
 147         SND_SOC_DAPM_MIC("Mic (external)", NULL),
 148         SND_SOC_DAPM_LINE("Line In", NULL),
 149 };
 150
 151 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 152         {"Headphone Amplifier", NULL, "PCM DAC"},
 153         {"Line Out", NULL, "PCM DAC"},
 154         {"Headphone Jack", NULL, "Headphone Amplifier"},
 155 };
 156
 157 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 158         {"INL", NULL, "Line In"},
 159         {"INR", NULL, "Line In"},
 160         {"INL", NULL, "Mic (Internal)"},
 161         {"INR", NULL, "Mic (external)"},
 162 };
 163
 164 static int omap3pandora_out_init(struct snd_soc_codec *codec)
 165 {
 166         int ret;
 167
 168         ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
 169                                 ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 170         if (ret < 0)
 171                 return ret;
 172
 173         snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
 174                 ARRAY_SIZE(omap3pandora_out_map));
 175
 176         return snd_soc_dapm_sync(codec);
 177 }
 178
 179 static int omap3pandora_in_init(struct snd_soc_codec *codec)
 180 {
 181         int ret;
 182
 183         /* All TWL4030 output pins are floating */
 184         snd_soc_dapm_nc_pin(codec, "OUTL"),
 185         snd_soc_dapm_nc_pin(codec, "OUTR"),
 186         snd_soc_dapm_nc_pin(codec, "EARPIECE"),
 187         snd_soc_dapm_nc_pin(codec, "PREDRIVEL"),
 188         snd_soc_dapm_nc_pin(codec, "PREDRIVER"),
 189         snd_soc_dapm_nc_pin(codec, "HSOL"),
 190         snd_soc_dapm_nc_pin(codec, "HSOR"),
 191         snd_soc_dapm_nc_pin(codec, "CARKITL"),
 192         snd_soc_dapm_nc_pin(codec, "CARKITR"),
 193         snd_soc_dapm_nc_pin(codec, "HFL"),
 194         snd_soc_dapm_nc_pin(codec, "HFR"),
 195
 196         ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
 197                                 ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 198         if (ret < 0)
 199                 return ret;
 200
 201         snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
 202                 ARRAY_SIZE(omap3pandora_in_map));
 203
 204         return snd_soc_dapm_sync(codec);
 205 }
 206
 207 static struct snd_soc_ops omap3pandora_out_ops = {
 208         .hw_params = omap3pandora_out_hw_params,
 209 };
 210
 211 static struct snd_soc_ops omap3pandora_in_ops = {
 212         .hw_params = omap3pandora_in_hw_params,
 213 };
 214
 215 /* Digital audio interface glue - connects codec <--> CPU */
 216 static struct snd_soc_dai_link omap3pandora_dai[] = {
 217         {
 218                 .name = "PCM1773",
 219                 .stream_name = "HiFi Out",
 220                 .cpu_dai = &omap_mcbsp_dai[0],
 221                 .codec_dai = &twl4030_dai,
 222                 .ops = &omap3pandora_out_ops,
 223                 .init = omap3pandora_out_init,
 224         }, {
 225                 .name = "TWL4030",
 226                 .stream_name = "Line/Mic In",
 227                 .cpu_dai = &omap_mcbsp_dai[1],
 228                 .codec_dai = &twl4030_dai,
 229                 .ops = &omap3pandora_in_ops,
 230                 .init = omap3pandora_in_init,
 231         }
 232 };
 233
 234 /* SoC card */
 235 static struct snd_soc_card snd_soc_card_omap3pandora = {
 236         .name = "omap3pandora",
 237         .platform = &omap_soc_platform,
 238         .dai_link = omap3pandora_dai,
 239         .num_links = ARRAY_SIZE(omap3pandora_dai),
 240 };
 241
 242 /* Audio subsystem */
 243 static struct snd_soc_device omap3pandora_snd_data = {
 244         .card = &snd_soc_card_omap3pandora,
 245         .codec_dev = &soc_codec_dev_twl4030,
 246 };
 247
 248 static struct platform_device *omap3pandora_snd_device;
 249
 250 static int __init omap3pandora_soc_init(void)
 251 {
 252         int ret;
 253
 254         if (!machine_is_omap3_pandora()) {
 255                 pr_debug(PREFIX "Not OMAP3 Pandora\n");
 256                 return -ENODEV;
 257         }
 258         pr_info("OMAP3 Pandora SoC init\n");
 259
 260         ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 261         if (ret) {
 262                 pr_err(PREFIX "Failed to get DAC power GPIO\n");
 263                 return ret;
 264         }
 265
 266         ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 267         if (ret) {
 268                 pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 269                 goto fail0;
 270         }
 271
 272         ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 273         if (ret) {
 274                 pr_err(PREFIX "Failed to get amp power GPIO\n");
 275                 goto fail0;
 276         }
 277
 278         ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 279         if (ret) {
 280                 pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 281                 goto fail1;
 282         }
 283
 284         omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 285         if (omap3pandora_snd_device == NULL) {
 286                 pr_err(PREFIX "Platform device allocation failed\n");
 287                 ret = -ENOMEM;
 288                 goto fail1;
 289         }
 290
 291         platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
 292         omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
 293         *(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
 294         *(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */
 295
 296         ret = platform_device_add(omap3pandora_snd_device);
 297         if (ret) {
 298                 pr_err(PREFIX "Unable to add platform device\n");
 299                 goto fail2;
 300         }
 301
 302         return 0;
 303
 304 fail2:
 305         platform_device_put(omap3pandora_snd_device);
 306 fail1:
 307         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 308 fail0:
 309         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 310         return ret;
 311 }
 312 module_init(omap3pandora_soc_init);
 313
 314 static void __exit omap3pandora_soc_exit(void)
 315 {
 316         platform_device_unregister(omap3pandora_snd_device);
 317         gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 318         gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 319 }
 320 module_exit(omap3pandora_soc_exit);
 321
 322 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 323 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 324 MODULE_LICENSE("GPL");