kernel/sound/soc/intel/boards/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         if (!mfld_codec)
 232                 return;
 233
 234         jack_data.mfld_jack = &mfld_jack;
 235         jack_data.intr_id = intr_status;
 236
 237         sn95031_jack_detection(mfld_codec, &jack_data);
 238         /* TODO: add american headset detection post gpiolib support */
 239 }
 240
 241 static int mfld_init(struct snd_soc_pcm_runtime *runtime)
 242 {
 243         struct snd_soc_dapm_context *dapm = &runtime->card->dapm;
 244         int ret_val;
 245
 246         /* default is earpiece pin, userspace sets it explcitly */
 247         snd_soc_dapm_disable_pin(dapm, "Headphones");
 248         /* default is lineout NC, userspace sets it explcitly */
 249         snd_soc_dapm_disable_pin(dapm, "LINEOUTL");
 250         snd_soc_dapm_disable_pin(dapm, "LINEOUTR");
 251         lo_dac = 3;
 252         hs_switch = 0;
 253         /* we dont use linein in this so set to NC */
 254         snd_soc_dapm_disable_pin(dapm, "LINEINL");
 255         snd_soc_dapm_disable_pin(dapm, "LINEINR");
 256
 257         /* Headset and button jack detection */
 258         ret_val = snd_soc_card_jack_new(runtime->card,
 259                         "Intel(R) MID Audio Jack", SND_JACK_HEADSET |
 260                         SND_JACK_BTN_0 | SND_JACK_BTN_1, &mfld_jack,
 261                         mfld_jack_pins, ARRAY_SIZE(mfld_jack_pins));
 262         if (ret_val) {
 263                 pr_err("jack creation failed\n");
 264                 return ret_val;
 265         }
 266
 267         ret_val = snd_soc_jack_add_zones(&mfld_jack,
 268                         ARRAY_SIZE(mfld_zones), mfld_zones);
 269         if (ret_val) {
 270                 pr_err("adding jack zones failed\n");
 271                 return ret_val;
 272         }
 273
 274         mfld_codec = runtime->codec;
 275
 276         /* we want to check if anything is inserted at boot,
 277          * so send a fake event to codec and it will read adc
 278          * to find if anything is there or not */
 279         mfld_jack_check(MFLD_JACK_INSERT);
 280         return ret_val;
 281 }
 282
 283 static struct snd_soc_dai_link mfld_msic_dailink[] = {
 284         {
 285                 .name = "Medfield Headset",
 286                 .stream_name = "Headset",
 287                 .cpu_dai_name = "Headset-cpu-dai",
 288                 .codec_dai_name = "SN95031 Headset",
 289                 .codec_name = "sn95031",
 290                 .platform_name = "sst-platform",
 291                 .init = mfld_init,
 292         },
 293         {
 294                 .name = "Medfield Speaker",
 295                 .stream_name = "Speaker",
 296                 .cpu_dai_name = "Speaker-cpu-dai",
 297                 .codec_dai_name = "SN95031 Speaker",
 298                 .codec_name = "sn95031",
 299                 .platform_name = "sst-platform",
 300                 .init = NULL,
 301         },
 302         {
 303                 .name = "Medfield Vibra",
 304                 .stream_name = "Vibra1",
 305                 .cpu_dai_name = "Vibra1-cpu-dai",
 306                 .codec_dai_name = "SN95031 Vibra1",
 307                 .codec_name = "sn95031",
 308                 .platform_name = "sst-platform",
 309                 .init = NULL,
 310         },
 311         {
 312                 .name = "Medfield Haptics",
 313                 .stream_name = "Vibra2",
 314                 .cpu_dai_name = "Vibra2-cpu-dai",
 315                 .codec_dai_name = "SN95031 Vibra2",
 316                 .codec_name = "sn95031",
 317                 .platform_name = "sst-platform",
 318                 .init = NULL,
 319         },
 320         {
 321                 .name = "Medfield Compress",
 322                 .stream_name = "Speaker",
 323                 .cpu_dai_name = "Compress-cpu-dai",
 324                 .codec_dai_name = "SN95031 Speaker",
 325                 .codec_name = "sn95031",
 326                 .platform_name = "sst-platform",
 327                 .init = NULL,
 328         },
 329 };
 330
 331 /* SoC card */
 332 static struct snd_soc_card snd_soc_card_mfld = {
 333         .name = "medfield_audio",
 334         .owner = THIS_MODULE,
 335         .dai_link = mfld_msic_dailink,
 336         .num_links = ARRAY_SIZE(mfld_msic_dailink),
 337
 338         .controls = mfld_snd_controls,
 339         .num_controls = ARRAY_SIZE(mfld_snd_controls),
 340         .dapm_widgets = mfld_widgets,
 341         .num_dapm_widgets = ARRAY_SIZE(mfld_widgets),
 342         .dapm_routes = mfld_map,
 343         .num_dapm_routes = ARRAY_SIZE(mfld_map),
 344 };
 345
 346 static irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
 347 {
 348         struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
 349
 350         memcpy_fromio(&mc_private->interrupt_status,
 351                         ((void *)(mc_private->int_base)),
 352                         sizeof(u8));
 353         return IRQ_WAKE_THREAD;
 354 }
 355
 356 static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
 357 {
 358         struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
 359
 360         mfld_jack_check(mc_drv_ctx->interrupt_status);
 361
 362         return IRQ_HANDLED;
 363 }
 364
 365 static int snd_mfld_mc_probe(struct platform_device *pdev)
 366 {
 367         int ret_val = 0, irq;
 368         struct mfld_mc_private *mc_drv_ctx;
 369         struct resource *irq_mem;
 370
 371         pr_debug("snd_mfld_mc_probe called\n");
 372
 373         /* retrive the irq number */
 374         irq = platform_get_irq(pdev, 0);
 375
 376         /* audio interrupt base of SRAM location where
 377          * interrupts are stored by System FW */
 378         mc_drv_ctx = devm_kzalloc(&pdev->dev, sizeof(*mc_drv_ctx), GFP_ATOMIC);
 379         if (!mc_drv_ctx) {
 380                 pr_err("allocation failed\n");
 381                 return -ENOMEM;
 382         }
 383
 384         irq_mem = platform_get_resource_byname(
 385                                 pdev, IORESOURCE_MEM, "IRQ_BASE");
 386         if (!irq_mem) {
 387                 pr_err("no mem resource given\n");
 388                 return -ENODEV;
 389         }
 390         mc_drv_ctx->int_base = devm_ioremap_nocache(&pdev->dev, irq_mem->start,
 391                                                     resource_size(irq_mem));
 392         if (!mc_drv_ctx->int_base) {
 393                 pr_err("Mapping of cache failed\n");
 394                 return -ENOMEM;
 395         }
 396         /* register for interrupt */
 397         ret_val = devm_request_threaded_irq(&pdev->dev, irq,
 398                         snd_mfld_jack_intr_handler,
 399                         snd_mfld_jack_detection,
 400                         IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
 401         if (ret_val) {
 402                 pr_err("cannot register IRQ\n");
 403                 return ret_val;
 404         }
 405         /* register the soc card */
 406         snd_soc_card_mfld.dev = &pdev->dev;
 407         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_mfld);
 408         if (ret_val) {
 409                 pr_debug("snd_soc_register_card failed %d\n", ret_val);
 410                 return ret_val;
 411         }
 412         platform_set_drvdata(pdev, mc_drv_ctx);
 413         pr_debug("successfully exited probe\n");
 414         return 0;
 415 }
 416
 417 static struct platform_driver snd_mfld_mc_driver = {
 418         .driver = {
 419                 .name = "msic_audio",
 420         },
 421         .probe = snd_mfld_mc_probe,
 422 };
 423
 424 module_platform_driver(snd_mfld_mc_driver);
 425
 426 MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
 427 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 428 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 429 MODULE_LICENSE("GPL v2");
 430 MODULE_ALIAS("platform:msic-audio");