sound/soc/intel/mfld_machine.c

   1 /*
   2  *  mfld_machine.c - ASoc Machine driver for Intel Medfield MID platform
   3  *
   4  *  Copyright (C) 2010 Intel Corp
   5  *  Author: Vinod Koul <vinod.koul@intel.com>
   6  *  Author: Harsha Priya <priya.harsha@intel.com>
   7  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; version 2 of the License.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  21  *
  22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  */
  24
  25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26
  27 #include <linux/init.h>
  28 #include <linux/device.h>
  29 #include <linux/slab.h>
  30 #include <linux/io.h>
  31 #include <linux/module.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/soc.h>
  35 #include <sound/jack.h>
  36 #include "../codecs/sn95031.h"
  37
  38 #define MID_MONO 1
  39 #define MID_STEREO 2
  40 #define MID_MAX_CAP 5
  41 #define MFLD_JACK_INSERT 0x04
  42
  43 enum soc_mic_bias_zones {
  44         MFLD_MV_START = 0,
  45         /* mic bias volutage range for Headphones*/
  46         MFLD_MV_HP = 400,
  47         /* mic bias volutage range for American Headset*/
  48         MFLD_MV_AM_HS = 650,
  49         /* mic bias volutage range for Headset*/
  50         MFLD_MV_HS = 2000,
  51         MFLD_MV_UNDEFINED,
  52 };
  53
  54 static unsigned int     hs_switch;
  55 static unsigned int     lo_dac;
  56
  57 struct mfld_mc_private {
  58         void __iomem *int_base;
  59         u8 interrupt_status;
  60 };
  61
  62 struct snd_soc_jack mfld_jack;
  63
  64 /*Headset jack detection DAPM pins */
  65 static struct snd_soc_jack_pin mfld_jack_pins[] = {
  66         {
  67                 .pin = "Headphones",
  68                 .mask = SND_JACK_HEADPHONE,
  69         },
  70         {
  71                 .pin = "AMIC1",
  72                 .mask = SND_JACK_MICROPHONE,
  73         },
  74 };
  75
  76 /* jack detection voltage zones */
  77 static struct snd_soc_jack_zone mfld_zones[] = {
  78         {MFLD_MV_START, MFLD_MV_AM_HS, SND_JACK_HEADPHONE},
  79         {MFLD_MV_AM_HS, MFLD_MV_HS, SND_JACK_HEADSET},
  80 };
  81
  82 /* sound card controls */
  83 static const char *headset_switch_text[] = {"Earpiece", "Headset"};
  84
  85 static const char *lo_text[] = {"Vibra", "Headset", "IHF", "None"};
  86
  87 static const struct soc_enum headset_enum =
  88         SOC_ENUM_SINGLE_EXT(2, headset_switch_text);
  89
  90 static const struct soc_enum lo_enum =
  91         SOC_ENUM_SINGLE_EXT(4, lo_text);
  92
  93 static int headset_get_switch(struct snd_kcontrol *kcontrol,
  94         struct snd_ctl_elem_value *ucontrol)
  95 {
  96         ucontrol->value.integer.value[0] = hs_switch;
  97         return 0;
  98 }
  99
 100 static int headset_set_switch(struct snd_kcontrol *kcontrol,
 101         struct snd_ctl_elem_value *ucontrol)
 102 {
 103         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 104         struct snd_soc_dapm_context *dapm = &codec->dapm;
 105
 106         if (ucontrol->value.integer.value[0] == hs_switch)
 107                 return 0;
 108
 109         snd_soc_dapm_mutex_lock(dapm);
 110
 111         if (ucontrol->value.integer.value[0]) {
 112                 pr_debug("hs_set HS path\n");
 113                 snd_soc_dapm_enable_pin_unlocked(dapm, "Headphones");
 114                 snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
 115         } else {
 116                 pr_debug("hs_set EP path\n");
 117                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
 118                 snd_soc_dapm_enable_pin_unlocked(dapm, "EPOUT");
 119         }
 120
 121         snd_soc_dapm_sync_unlocked(dapm);
 122
 123         snd_soc_dapm_mutex_unlock(dapm);
 124
 125         hs_switch = ucontrol->value.integer.value[0];
 126
 127         return 0;
 128 }
 129
 130 static void lo_enable_out_pins(struct snd_soc_codec *codec)
 131 {
 132         struct snd_soc_dapm_context *dapm = &codec->dapm;
 133
 134         snd_soc_dapm_enable_pin_unlocked(dapm, "IHFOUTL");
 135         snd_soc_dapm_enable_pin_unlocked(dapm, "IHFOUTR");
 136         snd_soc_dapm_enable_pin_unlocked(dapm, "LINEOUTL");
 137         snd_soc_dapm_enable_pin_unlocked(dapm, "LINEOUTR");
 138         snd_soc_dapm_enable_pin_unlocked(dapm, "VIB1OUT");
 139         snd_soc_dapm_enable_pin_unlocked(dapm, "VIB2OUT");
 140         if (hs_switch) {
 141                 snd_soc_dapm_enable_pin_unlocked(dapm, "Headphones");
 142                 snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
 143         } else {
 144                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
 145                 snd_soc_dapm_enable_pin_unlocked(dapm, "EPOUT");
 146         }
 147 }
 148
 149 static int lo_get_switch(struct snd_kcontrol *kcontrol,
 150         struct snd_ctl_elem_value *ucontrol)
 151 {
 152         ucontrol->value.integer.value[0] = lo_dac;
 153         return 0;
 154 }
 155
 156 static int lo_set_switch(struct snd_kcontrol *kcontrol,
 157         struct snd_ctl_elem_value *ucontrol)
 158 {
 159         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 160         struct snd_soc_dapm_context *dapm = &codec->dapm;
 161
 162         if (ucontrol->value.integer.value[0] == lo_dac)
 163                 return 0;
 164
 165         snd_soc_dapm_mutex_lock(dapm);
 166
 167         /* we dont want to work with last state of lineout so just enable all
 168          * pins and then disable pins not required
 169          */
 170         lo_enable_out_pins(codec);
 171
 172         switch (ucontrol->value.integer.value[0]) {
 173         case 0:
 174                 pr_debug("set vibra path\n");
 175                 snd_soc_dapm_disable_pin_unlocked(dapm, "VIB1OUT");
 176                 snd_soc_dapm_disable_pin_unlocked(dapm, "VIB2OUT");
 177                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0);
 178                 break;
 179
 180         case 1:
 181                 pr_debug("set hs  path\n");
 182                 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
 183                 snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
 184                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x22);
 185                 break;
 186
 187         case 2:
 188                 pr_debug("set spkr path\n");
 189                 snd_soc_dapm_disable_pin_unlocked(dapm, "IHFOUTL");
 190                 snd_soc_dapm_disable_pin_unlocked(dapm, "IHFOUTR");
 191                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x44);
 192                 break;
 193
 194         case 3:
 195                 pr_debug("set null path\n");
 196                 snd_soc_dapm_disable_pin_unlocked(dapm, "LINEOUTL");
 197                 snd_soc_dapm_disable_pin_unlocked(dapm, "LINEOUTR");
 198                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x66);
 199                 break;
 200         }
 201
 202         snd_soc_dapm_sync_unlocked(dapm);
 203
 204         snd_soc_dapm_mutex_unlock(dapm);
 205
 206         lo_dac = ucontrol->value.integer.value[0];
 207         return 0;
 208 }
 209
 210 static const struct snd_kcontrol_new mfld_snd_controls[] = {
 211         SOC_ENUM_EXT("Playback Switch", headset_enum,
 212                         headset_get_switch, headset_set_switch),
 213         SOC_ENUM_EXT("Lineout Mux", lo_enum,
 214                         lo_get_switch, lo_set_switch),
 215 };
 216
 217 static const struct snd_soc_dapm_widget mfld_widgets[] = {
 218         SND_SOC_DAPM_HP("Headphones", NULL),
 219         SND_SOC_DAPM_MIC("Mic", NULL),
 220 };
 221
 222 static const struct snd_soc_dapm_route mfld_map[] = {
 223         {"Headphones", NULL, "HPOUTR"},
 224         {"Headphones", NULL, "HPOUTL"},
 225         {"Mic", NULL, "AMIC1"},
 226 };
 227
 228 static void mfld_jack_check(unsigned int intr_status)
 229 {
 230         struct mfld_jack_data jack_data;
 231
 232         jack_data.mfld_jack = &mfld_jack;
 233         jack_data.intr_id = intr_status;
 234
 235         sn95031_jack_detection(&jack_data);
 236         /* TODO: add american headset detection post gpiolib support */
 237 }
 238
 239 static int mfld_init(struct snd_soc_pcm_runtime *runtime)
 240 {
 241         struct snd_soc_codec *codec = runtime->codec;
 242         struct snd_soc_dapm_context *dapm = &codec->dapm;
 243         int ret_val;
 244
 245         /* Add jack sense widgets */
 246         snd_soc_dapm_new_controls(dapm, mfld_widgets, ARRAY_SIZE(mfld_widgets));
 247
 248         /* Set up the map */
 249         snd_soc_dapm_add_routes(dapm, mfld_map, ARRAY_SIZE(mfld_map));
 250
 251         /* always connected */
 252         snd_soc_dapm_enable_pin(dapm, "Headphones");
 253         snd_soc_dapm_enable_pin(dapm, "Mic");
 254
 255         ret_val = snd_soc_add_codec_controls(codec, mfld_snd_controls,
 256                                 ARRAY_SIZE(mfld_snd_controls));
 257         if (ret_val) {
 258                 pr_err("soc_add_controls failed %d", ret_val);
 259                 return ret_val;
 260         }
 261         /* default is earpiece pin, userspace sets it explcitly */
 262         snd_soc_dapm_disable_pin(dapm, "Headphones");
 263         /* default is lineout NC, userspace sets it explcitly */
 264         snd_soc_dapm_disable_pin(dapm, "LINEOUTL");
 265         snd_soc_dapm_disable_pin(dapm, "LINEOUTR");
 266         lo_dac = 3;
 267         hs_switch = 0;
 268         /* we dont use linein in this so set to NC */
 269         snd_soc_dapm_disable_pin(dapm, "LINEINL");
 270         snd_soc_dapm_disable_pin(dapm, "LINEINR");
 271
 272         /* Headset and button jack detection */
 273         ret_val = snd_soc_jack_new(codec, "Intel(R) MID Audio Jack",
 274                         SND_JACK_HEADSET | SND_JACK_BTN_0 |
 275                         SND_JACK_BTN_1, &mfld_jack);
 276         if (ret_val) {
 277                 pr_err("jack creation failed\n");
 278                 return ret_val;
 279         }
 280
 281         ret_val = snd_soc_jack_add_pins(&mfld_jack,
 282                         ARRAY_SIZE(mfld_jack_pins), mfld_jack_pins);
 283         if (ret_val) {
 284                 pr_err("adding jack pins failed\n");
 285                 return ret_val;
 286         }
 287         ret_val = snd_soc_jack_add_zones(&mfld_jack,
 288                         ARRAY_SIZE(mfld_zones), mfld_zones);
 289         if (ret_val) {
 290                 pr_err("adding jack zones failed\n");
 291                 return ret_val;
 292         }
 293
 294         /* we want to check if anything is inserted at boot,
 295          * so send a fake event to codec and it will read adc
 296          * to find if anything is there or not */
 297         mfld_jack_check(MFLD_JACK_INSERT);
 298         return ret_val;
 299 }
 300
 301 static struct snd_soc_dai_link mfld_msic_dailink[] = {
 302         {
 303                 .name = "Medfield Headset",
 304                 .stream_name = "Headset",
 305                 .cpu_dai_name = "Headset-cpu-dai",
 306                 .codec_dai_name = "SN95031 Headset",
 307                 .codec_name = "sn95031",
 308                 .platform_name = "sst-platform",
 309                 .init = mfld_init,
 310         },
 311         {
 312                 .name = "Medfield Speaker",
 313                 .stream_name = "Speaker",
 314                 .cpu_dai_name = "Speaker-cpu-dai",
 315                 .codec_dai_name = "SN95031 Speaker",
 316                 .codec_name = "sn95031",
 317                 .platform_name = "sst-platform",
 318                 .init = NULL,
 319         },
 320         {
 321                 .name = "Medfield Vibra",
 322                 .stream_name = "Vibra1",
 323                 .cpu_dai_name = "Vibra1-cpu-dai",
 324                 .codec_dai_name = "SN95031 Vibra1",
 325                 .codec_name = "sn95031",
 326                 .platform_name = "sst-platform",
 327                 .init = NULL,
 328         },
 329         {
 330                 .name = "Medfield Haptics",
 331                 .stream_name = "Vibra2",
 332                 .cpu_dai_name = "Vibra2-cpu-dai",
 333                 .codec_dai_name = "SN95031 Vibra2",
 334                 .codec_name = "sn95031",
 335                 .platform_name = "sst-platform",
 336                 .init = NULL,
 337         },
 338         {
 339                 .name = "Medfield Compress",
 340                 .stream_name = "Speaker",
 341                 .cpu_dai_name = "Compress-cpu-dai",
 342                 .codec_dai_name = "SN95031 Speaker",
 343                 .codec_name = "sn95031",
 344                 .platform_name = "sst-platform",
 345                 .init = NULL,
 346         },
 347 };
 348
 349 /* SoC card */
 350 static struct snd_soc_card snd_soc_card_mfld = {
 351         .name = "medfield_audio",
 352         .owner = THIS_MODULE,
 353         .dai_link = mfld_msic_dailink,
 354         .num_links = ARRAY_SIZE(mfld_msic_dailink),
 355 };
 356
 357 static irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
 358 {
 359         struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
 360
 361         memcpy_fromio(&mc_private->interrupt_status,
 362                         ((void *)(mc_private->int_base)),
 363                         sizeof(u8));
 364         return IRQ_WAKE_THREAD;
 365 }
 366
 367 static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
 368 {
 369         struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
 370
 371         if (mfld_jack.codec == NULL)
 372                 return IRQ_HANDLED;
 373         mfld_jack_check(mc_drv_ctx->interrupt_status);
 374
 375         return IRQ_HANDLED;
 376 }
 377
 378 static int snd_mfld_mc_probe(struct platform_device *pdev)
 379 {
 380         int ret_val = 0, irq;
 381         struct mfld_mc_private *mc_drv_ctx;
 382         struct resource *irq_mem;
 383
 384         pr_debug("snd_mfld_mc_probe called\n");
 385
 386         /* retrive the irq number */
 387         irq = platform_get_irq(pdev, 0);
 388
 389         /* audio interrupt base of SRAM location where
 390          * interrupts are stored by System FW */
 391         mc_drv_ctx = devm_kzalloc(&pdev->dev, sizeof(*mc_drv_ctx), GFP_ATOMIC);
 392         if (!mc_drv_ctx) {
 393                 pr_err("allocation failed\n");
 394                 return -ENOMEM;
 395         }
 396
 397         irq_mem = platform_get_resource_byname(
 398                                 pdev, IORESOURCE_MEM, "IRQ_BASE");
 399         if (!irq_mem) {
 400                 pr_err("no mem resource given\n");
 401                 return -ENODEV;
 402         }
 403         mc_drv_ctx->int_base = devm_ioremap_nocache(&pdev->dev, irq_mem->start,
 404                                                     resource_size(irq_mem));
 405         if (!mc_drv_ctx->int_base) {
 406                 pr_err("Mapping of cache failed\n");
 407                 return -ENOMEM;
 408         }
 409         /* register for interrupt */
 410         ret_val = devm_request_threaded_irq(&pdev->dev, irq,
 411                         snd_mfld_jack_intr_handler,
 412                         snd_mfld_jack_detection,
 413                         IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
 414         if (ret_val) {
 415                 pr_err("cannot register IRQ\n");
 416                 return ret_val;
 417         }
 418         /* register the soc card */
 419         snd_soc_card_mfld.dev = &pdev->dev;
 420         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_mfld);
 421         if (ret_val) {
 422                 pr_debug("snd_soc_register_card failed %d\n", ret_val);
 423                 return ret_val;
 424         }
 425         platform_set_drvdata(pdev, mc_drv_ctx);
 426         pr_debug("successfully exited probe\n");
 427         return 0;
 428 }
 429
 430 static struct platform_driver snd_mfld_mc_driver = {
 431         .driver = {
 432                 .owner = THIS_MODULE,
 433                 .name = "msic_audio",
 434         },
 435         .probe = snd_mfld_mc_probe,
 436 };
 437
 438 module_platform_driver(snd_mfld_mc_driver);
 439
 440 MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
 441 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 442 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 443 MODULE_LICENSE("GPL v2");
 444 MODULE_ALIAS("platform:msic-audio");