sound/soc/mid-x86/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
 105         if (ucontrol->value.integer.value[0] == hs_switch)
 106                 return 0;
 107
 108         if (ucontrol->value.integer.value[0]) {
 109                 pr_debug("hs_set HS path\n");
 110                 snd_soc_dapm_enable_pin(&codec->dapm, "Headphones");
 111                 snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
 112         } else {
 113                 pr_debug("hs_set EP path\n");
 114                 snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
 115                 snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
 116         }
 117         snd_soc_dapm_sync(&codec->dapm);
 118         hs_switch = ucontrol->value.integer.value[0];
 119
 120         return 0;
 121 }
 122
 123 static void lo_enable_out_pins(struct snd_soc_codec *codec)
 124 {
 125         snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTL");
 126         snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTR");
 127         snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTL");
 128         snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTR");
 129         snd_soc_dapm_enable_pin(&codec->dapm, "VIB1OUT");
 130         snd_soc_dapm_enable_pin(&codec->dapm, "VIB2OUT");
 131         if (hs_switch) {
 132                 snd_soc_dapm_enable_pin(&codec->dapm, "Headphones");
 133                 snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
 134         } else {
 135                 snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
 136                 snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
 137         }
 138 }
 139
 140 static int lo_get_switch(struct snd_kcontrol *kcontrol,
 141         struct snd_ctl_elem_value *ucontrol)
 142 {
 143         ucontrol->value.integer.value[0] = lo_dac;
 144         return 0;
 145 }
 146
 147 static int lo_set_switch(struct snd_kcontrol *kcontrol,
 148         struct snd_ctl_elem_value *ucontrol)
 149 {
 150         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 151
 152         if (ucontrol->value.integer.value[0] == lo_dac)
 153                 return 0;
 154
 155         /* we dont want to work with last state of lineout so just enable all
 156          * pins and then disable pins not required
 157          */
 158         lo_enable_out_pins(codec);
 159         switch (ucontrol->value.integer.value[0]) {
 160         case 0:
 161                 pr_debug("set vibra path\n");
 162                 snd_soc_dapm_disable_pin(&codec->dapm, "VIB1OUT");
 163                 snd_soc_dapm_disable_pin(&codec->dapm, "VIB2OUT");
 164                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0);
 165                 break;
 166
 167         case 1:
 168                 pr_debug("set hs  path\n");
 169                 snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
 170                 snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
 171                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x22);
 172                 break;
 173
 174         case 2:
 175                 pr_debug("set spkr path\n");
 176                 snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTL");
 177                 snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTR");
 178                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x44);
 179                 break;
 180
 181         case 3:
 182                 pr_debug("set null path\n");
 183                 snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTL");
 184                 snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTR");
 185                 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x66);
 186                 break;
 187         }
 188         snd_soc_dapm_sync(&codec->dapm);
 189         lo_dac = ucontrol->value.integer.value[0];
 190         return 0;
 191 }
 192
 193 static const struct snd_kcontrol_new mfld_snd_controls[] = {
 194         SOC_ENUM_EXT("Playback Switch", headset_enum,
 195                         headset_get_switch, headset_set_switch),
 196         SOC_ENUM_EXT("Lineout Mux", lo_enum,
 197                         lo_get_switch, lo_set_switch),
 198 };
 199
 200 static const struct snd_soc_dapm_widget mfld_widgets[] = {
 201         SND_SOC_DAPM_HP("Headphones", NULL),
 202         SND_SOC_DAPM_MIC("Mic", NULL),
 203 };
 204
 205 static const struct snd_soc_dapm_route mfld_map[] = {
 206         {"Headphones", NULL, "HPOUTR"},
 207         {"Headphones", NULL, "HPOUTL"},
 208         {"Mic", NULL, "AMIC1"},
 209 };
 210
 211 static void mfld_jack_check(unsigned int intr_status)
 212 {
 213         struct mfld_jack_data jack_data;
 214
 215         jack_data.mfld_jack = &mfld_jack;
 216         jack_data.intr_id = intr_status;
 217
 218         sn95031_jack_detection(&jack_data);
 219         /* TODO: add american headset detection post gpiolib support */
 220 }
 221
 222 static int mfld_init(struct snd_soc_pcm_runtime *runtime)
 223 {
 224         struct snd_soc_codec *codec = runtime->codec;
 225         struct snd_soc_dapm_context *dapm = &codec->dapm;
 226         int ret_val;
 227
 228         /* Add jack sense widgets */
 229         snd_soc_dapm_new_controls(dapm, mfld_widgets, ARRAY_SIZE(mfld_widgets));
 230
 231         /* Set up the map */
 232         snd_soc_dapm_add_routes(dapm, mfld_map, ARRAY_SIZE(mfld_map));
 233
 234         /* always connected */
 235         snd_soc_dapm_enable_pin(dapm, "Headphones");
 236         snd_soc_dapm_enable_pin(dapm, "Mic");
 237
 238         ret_val = snd_soc_add_codec_controls(codec, mfld_snd_controls,
 239                                 ARRAY_SIZE(mfld_snd_controls));
 240         if (ret_val) {
 241                 pr_err("soc_add_controls failed %d", ret_val);
 242                 return ret_val;
 243         }
 244         /* default is earpiece pin, userspace sets it explcitly */
 245         snd_soc_dapm_disable_pin(dapm, "Headphones");
 246         /* default is lineout NC, userspace sets it explcitly */
 247         snd_soc_dapm_disable_pin(dapm, "LINEOUTL");
 248         snd_soc_dapm_disable_pin(dapm, "LINEOUTR");
 249         lo_dac = 3;
 250         hs_switch = 0;
 251         /* we dont use linein in this so set to NC */
 252         snd_soc_dapm_disable_pin(dapm, "LINEINL");
 253         snd_soc_dapm_disable_pin(dapm, "LINEINR");
 254
 255         /* Headset and button jack detection */
 256         ret_val = snd_soc_jack_new(codec, "Intel(R) MID Audio Jack",
 257                         SND_JACK_HEADSET | SND_JACK_BTN_0 |
 258                         SND_JACK_BTN_1, &mfld_jack);
 259         if (ret_val) {
 260                 pr_err("jack creation failed\n");
 261                 return ret_val;
 262         }
 263
 264         ret_val = snd_soc_jack_add_pins(&mfld_jack,
 265                         ARRAY_SIZE(mfld_jack_pins), mfld_jack_pins);
 266         if (ret_val) {
 267                 pr_err("adding jack pins failed\n");
 268                 return ret_val;
 269         }
 270         ret_val = snd_soc_jack_add_zones(&mfld_jack,
 271                         ARRAY_SIZE(mfld_zones), mfld_zones);
 272         if (ret_val) {
 273                 pr_err("adding jack zones failed\n");
 274                 return ret_val;
 275         }
 276
 277         /* we want to check if anything is inserted at boot,
 278          * so send a fake event to codec and it will read adc
 279          * to find if anything is there or not */
 280         mfld_jack_check(MFLD_JACK_INSERT);
 281         return ret_val;
 282 }
 283
 284 static struct snd_soc_dai_link mfld_msic_dailink[] = {
 285         {
 286                 .name = "Medfield Headset",
 287                 .stream_name = "Headset",
 288                 .cpu_dai_name = "Headset-cpu-dai",
 289                 .codec_dai_name = "SN95031 Headset",
 290                 .codec_name = "sn95031",
 291                 .platform_name = "sst-platform",
 292                 .init = mfld_init,
 293         },
 294         {
 295                 .name = "Medfield Speaker",
 296                 .stream_name = "Speaker",
 297                 .cpu_dai_name = "Speaker-cpu-dai",
 298                 .codec_dai_name = "SN95031 Speaker",
 299                 .codec_name = "sn95031",
 300                 .platform_name = "sst-platform",
 301                 .init = NULL,
 302         },
 303         {
 304                 .name = "Medfield Vibra",
 305                 .stream_name = "Vibra1",
 306                 .cpu_dai_name = "Vibra1-cpu-dai",
 307                 .codec_dai_name = "SN95031 Vibra1",
 308                 .codec_name = "sn95031",
 309                 .platform_name = "sst-platform",
 310                 .init = NULL,
 311         },
 312         {
 313                 .name = "Medfield Haptics",
 314                 .stream_name = "Vibra2",
 315                 .cpu_dai_name = "Vibra2-cpu-dai",
 316                 .codec_dai_name = "SN95031 Vibra2",
 317                 .codec_name = "sn95031",
 318                 .platform_name = "sst-platform",
 319                 .init = NULL,
 320         },
 321 };
 322
 323 /* SoC card */
 324 static struct snd_soc_card snd_soc_card_mfld = {
 325         .name = "medfield_audio",
 326         .owner = THIS_MODULE,
 327         .dai_link = mfld_msic_dailink,
 328         .num_links = ARRAY_SIZE(mfld_msic_dailink),
 329 };
 330
 331 static irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
 332 {
 333         struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
 334
 335         memcpy_fromio(&mc_private->interrupt_status,
 336                         ((void *)(mc_private->int_base)),
 337                         sizeof(u8));
 338         return IRQ_WAKE_THREAD;
 339 }
 340
 341 static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
 342 {
 343         struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
 344
 345         if (mfld_jack.codec == NULL)
 346                 return IRQ_HANDLED;
 347         mfld_jack_check(mc_drv_ctx->interrupt_status);
 348
 349         return IRQ_HANDLED;
 350 }
 351
 352 static int __devinit snd_mfld_mc_probe(struct platform_device *pdev)
 353 {
 354         int ret_val = 0, irq;
 355         struct mfld_mc_private *mc_drv_ctx;
 356         struct resource *irq_mem;
 357
 358         pr_debug("snd_mfld_mc_probe called\n");
 359
 360         /* retrive the irq number */
 361         irq = platform_get_irq(pdev, 0);
 362
 363         /* audio interrupt base of SRAM location where
 364          * interrupts are stored by System FW */
 365         mc_drv_ctx = kzalloc(sizeof(*mc_drv_ctx), GFP_ATOMIC);
 366         if (!mc_drv_ctx) {
 367                 pr_err("allocation failed\n");
 368                 return -ENOMEM;
 369         }
 370
 371         irq_mem = platform_get_resource_byname(
 372                                 pdev, IORESOURCE_MEM, "IRQ_BASE");
 373         if (!irq_mem) {
 374                 pr_err("no mem resource given\n");
 375                 ret_val = -ENODEV;
 376                 goto unalloc;
 377         }
 378         mc_drv_ctx->int_base = ioremap_nocache(irq_mem->start,
 379                                         resource_size(irq_mem));
 380         if (!mc_drv_ctx->int_base) {
 381                 pr_err("Mapping of cache failed\n");
 382                 ret_val = -ENOMEM;
 383                 goto unalloc;
 384         }
 385         /* register for interrupt */
 386         ret_val = request_threaded_irq(irq, snd_mfld_jack_intr_handler,
 387                         snd_mfld_jack_detection,
 388                         IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
 389         if (ret_val) {
 390                 pr_err("cannot register IRQ\n");
 391                 goto unalloc;
 392         }
 393         /* register the soc card */
 394         snd_soc_card_mfld.dev = &pdev->dev;
 395         ret_val = snd_soc_register_card(&snd_soc_card_mfld);
 396         if (ret_val) {
 397                 pr_debug("snd_soc_register_card failed %d\n", ret_val);
 398                 goto freeirq;
 399         }
 400         platform_set_drvdata(pdev, mc_drv_ctx);
 401         pr_debug("successfully exited probe\n");
 402         return ret_val;
 403
 404 freeirq:
 405         free_irq(irq, mc_drv_ctx);
 406 unalloc:
 407         kfree(mc_drv_ctx);
 408         return ret_val;
 409 }
 410
 411 static int __devexit snd_mfld_mc_remove(struct platform_device *pdev)
 412 {
 413         struct mfld_mc_private *mc_drv_ctx = platform_get_drvdata(pdev);
 414
 415         pr_debug("snd_mfld_mc_remove called\n");
 416         free_irq(platform_get_irq(pdev, 0), mc_drv_ctx);
 417         snd_soc_unregister_card(&snd_soc_card_mfld);
 418         kfree(mc_drv_ctx);
 419         platform_set_drvdata(pdev, NULL);
 420         return 0;
 421 }
 422
 423 static struct platform_driver snd_mfld_mc_driver = {
 424         .driver = {
 425                 .owner = THIS_MODULE,
 426                 .name = "msic_audio",
 427         },
 428         .probe = snd_mfld_mc_probe,
 429         .remove = __devexit_p(snd_mfld_mc_remove),
 430 };
 431
 432 module_platform_driver(snd_mfld_mc_driver);
 433
 434 MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
 435 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 436 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 437 MODULE_LICENSE("GPL v2");
 438 MODULE_ALIAS("platform:msic-audio");