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