firmware/drivers/audio/as3514.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Driver for AS3514 and compatible audio codec
  11  *
  12  * Copyright (c) 2007 Daniel Ankers
  13  * Copyright (c) 2007 Christian Gmeiner
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24 #include "cpu.h"
  25 #include "debug.h"
  26 #include "system.h"
  27 #include "audio.h"
  28 #include "sound.h"
  29
  30 #include "audiohw.h"
  31 #include "i2s.h"
  32 #include "ascodec.h"
  33
  34 /*
  35  * This drivers supports:
  36  * as3514 , as used in the PP targets
  37  * as3515 , as used in the as3525 targets
  38  * as3543 , as used in the as3525v2 targets
  39  */
  40
  41 #if CONFIG_CPU == AS3525
  42 /* AMS Sansas based on the AS3525 use the LINE2 input for the analog radio
  43    signal instead of LINE1 */
  44 #define AS3514_LINE_IN_R AS3514_LINE_IN2_R
  45 #define AS3514_LINE_IN_L AS3514_LINE_IN2_L
  46 #define ADC_R_ADCMUX_LINE_IN ADC_R_ADCMUX_LINE_IN2
  47 #define AUDIOSET1_LIN_on AUDIOSET1_LIN2_on
  48
  49 #elif CONFIG_CPU == AS3525v2
  50 /* There is only 1 pair of registers on AS3543, the line input is selectable in
  51    LINE_IN_R register */
  52 #define AS3514_LINE_IN_R AS3514_LINE_IN1_R
  53 #define AS3514_LINE_IN_L AS3514_LINE_IN1_L
  54 #define ADC_R_ADCMUX_LINE_IN ADC_R_ADCMUX_LINE_IN2
  55 #define AUDIOSET1_LIN_on AUDIOSET1_LIN1_on
  56
  57 #else   /* PP use line1 */
  58
  59 #define AS3514_LINE_IN_R AS3514_LINE_IN1_R
  60 #define AS3514_LINE_IN_L AS3514_LINE_IN1_L
  61 #define ADC_R_ADCMUX_LINE_IN ADC_R_ADCMUX_LINE_IN1
  62 #define AUDIOSET1_LIN_on AUDIOSET1_LIN1_on
  63
  64 #endif
  65
  66 const struct sound_settings_info audiohw_settings[] = {
  67     [SOUND_VOLUME]        = {"dB",   0,   1, VOLUME_MIN/10,   6, -25},
  68     /* HAVE_SW_TONE_CONTROLS */
  69     [SOUND_BASS]          = {"dB",   0,   1, -24,  24,   0},
  70     [SOUND_TREBLE]        = {"dB",   0,   1, -24,  24,   0},
  71     [SOUND_BALANCE]       = {"%",    0,   1,-100, 100,   0},
  72     [SOUND_CHANNELS]      = {"",     0,   1,   0,   5,   0},
  73     [SOUND_STEREO_WIDTH]  = {"%",    0,   5,   0, 250, 100},
  74 #ifdef HAVE_RECORDING
  75     [SOUND_MIC_GAIN]      = {"dB",   1,   1,   0,  39,  23},
  76     [SOUND_LEFT_GAIN]     = {"dB",   1,   1,   0,  31,  23},
  77     [SOUND_RIGHT_GAIN]    = {"dB",   1,   1,   0,  31,  23},
  78 #endif
  79 };
  80
  81 /* Shadow registers */
  82 static uint8_t as3514_regs[AS3514_NUM_AUDIO_REGS]; /* 8-bit registers */
  83
  84 /*
  85  * little helper method to set register values.
  86  * With the help of as3514_regs, we minimize i2c
  87  * traffic.
  88  */
  89 static void as3514_write(unsigned int reg, unsigned int value)
  90 {
  91     ascodec_write(reg, value);
  92
  93     if (reg < AS3514_NUM_AUDIO_REGS)
  94         as3514_regs[reg] = value;
  95 }
  96
  97 /* Helpers to set/clear bits */
  98 static void as3514_set(unsigned int reg, unsigned int bits)
  99 {
 100     as3514_write(reg, as3514_regs[reg] | bits);
 101 }
 102
 103 static void as3514_clear(unsigned int reg, unsigned int bits)
 104 {
 105     as3514_write(reg, as3514_regs[reg] & ~bits);
 106 }
 107
 108 static void as3514_write_masked(unsigned int reg, unsigned int bits,
 109                                 unsigned int mask)
 110 {
 111     as3514_write(reg, (as3514_regs[reg] & ~mask) | (bits & mask));
 112 }
 113
 114 /* convert tenth of dB volume to master volume register value */
 115 int tenthdb2master(int db)
 116 {
 117     /* +6 to -73.5dB (or -81.0 dB) in 1.5dB steps == 53 (or 58) levels */
 118     if (db < VOLUME_MIN) {
 119         return 0x0;
 120     } else if (db > VOLUME_MAX) {
 121         return (VOLUME_MAX-VOLUME_MIN)/15;
 122     } else {
 123         return((db-VOLUME_MIN)/15); /* VOLUME_MIN is negative */
 124     }
 125 }
 126
 127 int sound_val2phys(int setting, int value)
 128 {
 129     switch(setting)
 130     {
 131 #if defined(HAVE_RECORDING)
 132     case SOUND_LEFT_GAIN:
 133     case SOUND_RIGHT_GAIN:
 134     case SOUND_MIC_GAIN:
 135         return (value - 23) * 15;
 136 #endif
 137
 138     default:
 139         return value;
 140     }
 141 }
 142
 143 /*
 144  * Initialise the PP I2C and I2S.
 145  */
 146 void audiohw_preinit(void)
 147 {
 148     /* read all reg values */
 149     ascodec_readbytes(0x0, AS3514_NUM_AUDIO_REGS, as3514_regs);
 150
 151 #ifdef HAVE_AS3543
 152
 153     as3514_write(AS3514_AUDIOSET1, AUDIOSET1_DAC_on | AUDIOSET1_DAC_GAIN_on);
 154     as3514_write(AS3514_AUDIOSET2, AUDIOSET2_HPH_QUALITY_LOW_POWER);
 155     /* common ground on, delay playback unmuting when inserting headphones */
 156     as3514_write(AS3514_AUDIOSET3, AUDIOSET3_HPCM_on | AUDIOSET3_HP_LONGSTART);
 157
 158     as3514_write(AS3543_DAC_IF, AS3543_DAC_INT_PLL);
 159     /* Select Line 2 for FM radio */
 160     as3514_set(AS3514_LINE_IN1_R, LINE_IN_R_LINE_SELECT);
 161     /* Output SUM of microphone/line/DAC */
 162     as3514_write(AS3514_HPH_OUT_R, HPH_OUT_R_HEADPHONES | HPH_OUT_R_HP_OUT_SUM);
 163
 164 #else
 165     /* as3514/as3515 */
 166
 167     /* Set ADC off, mixer on, DAC on, line out off, line in off, mic off */
 168     /* Turn on SUM, DAC */
 169     as3514_write(AS3514_AUDIOSET1, AUDIOSET1_DAC_on | AUDIOSET1_SUM_on);
 170
 171     /* Set BIAS on, DITH off, AGC off, IBR_DAC max reduction, LSP_LP on,
 172        IBR_LSP max reduction (50%), taken from c200v2 OF
 173      */
 174     as3514_write(AS3514_AUDIOSET2, AUDIOSET2_IBR_LSP_50 | AUDIOSET2_LSP_LP |
 175             AUDIOSET2_IBR_DAC_50 | AUDIOSET2_AGC_off | AUDIOSET2_DITH_off );
 176
 177     /* Mute and disable speaker */
 178     as3514_write(AS3514_LSP_OUT_R, LSP_OUT_R_SP_OVC_TO_256MS | 0x00);
 179     as3514_write(AS3514_LSP_OUT_L, LSP_OUT_L_SP_MUTE | 0x00);
 180
 181 #ifdef PHILIPS_SA9200
 182     /* LRCK 8-23kHz (there are audible clicks while reading the ADC otherwise) */
 183     as3514_write(AS3514_PLLMODE, PLLMODE_LRCK_8_23);
 184 #else
 185     /* LRCK 24-48kHz */
 186     as3514_write(AS3514_PLLMODE, PLLMODE_LRCK_24_48);
 187 #endif /* PHILIPS_SA9200 */
 188
 189     /* Set headphone over-current to 0, Min volume */
 190     as3514_write(AS3514_HPH_OUT_R, HPH_OUT_R_HP_OVC_TO_0MS | 0x00);
 191
 192 /* AMS Sansas based on the AS3525 need HPCM enabled, otherwise they output the
 193    L-R signal on both L and R headphone outputs instead of normal stereo.
 194    Turning it off saves a little power on targets that don't need it. */
 195 #if (CONFIG_CPU == AS3525)
 196     /* Set HPCM on, ZCU off, reduce bias current, settings taken from c200v2 OF
 197      */
 198     as3514_write(AS3514_AUDIOSET3, AUDIOSET3_IBR_HPH | AUDIOSET3_ZCU_off);
 199 #else
 200     /* TODO: check if AS3525 settings save power on e200v1 or as3525v2 */
 201     /* Set HPCM off, ZCU on */
 202     as3514_write(AS3514_AUDIOSET3, AUDIOSET3_HPCM_off);
 203 #endif /* CONFIG_CPU == AS3525 */
 204
 205     /* M2_Sup_off */
 206     as3514_set(AS3514_MIC2_L, MIC2_L_M2_SUP_off);
 207
 208 #endif /* HAVE_AS3543 */
 209
 210     /* registers identical on as3514/as3515 and as3543 */
 211
 212     /* M1_Sup_off */
 213     as3514_set(AS3514_MIC1_L, MIC1_L_M1_SUP_off);
 214
 215     /* Headphone ON, MUTE, Min volume */
 216     as3514_write(AS3514_HPH_OUT_L, HPH_OUT_L_HP_ON | HPH_OUT_L_HP_MUTE | 0x00);
 217
 218     /* DAC_Mute_off */
 219     as3514_set(AS3514_DAC_L, DAC_L_DAC_MUTE_off);
 220 }
 221
 222 static void audiohw_mute(bool mute)
 223 {
 224     if (mute) {
 225         as3514_set(AS3514_HPH_OUT_L, HPH_OUT_L_HP_MUTE);
 226     } else {
 227         as3514_clear(AS3514_HPH_OUT_L, HPH_OUT_L_HP_MUTE);
 228     }
 229 }
 230
 231 void audiohw_postinit(void)
 232 {
 233     /* wait until outputs have stabilized */
 234     sleep(HZ/4);
 235
 236 #ifdef CPU_PP
 237     ascodec_suppressor_on(false);
 238 #endif
 239
 240     audiohw_mute(false);
 241 }
 242
 243 void audiohw_set_master_vol(int vol_l, int vol_r)
 244 {
 245     unsigned int hph_r, hph_l;
 246     unsigned int mix_l, mix_r;
 247
 248     if (vol_l == 0 && vol_r == 0) {
 249         audiohw_mute(true);
 250         return;
 251     }
 252
 253     /* We combine the mixer/DAC channel volume range with the headphone volume
 254        range - keep first stage as loud as possible */
 255
 256 /*AS3543 mixer can go a little louder then the as3514, although
 257  * it might be possible to go louder on the as3514 as well */
 258
 259 #if CONFIG_CPU == AS3525v2
 260 #define MIXER_MAX_VOLUME 0x1b
 261 #else /* lets leave the AS3514 alone until its better tested*/
 262 #define MIXER_MAX_VOLUME 0x16
 263 #endif
 264
 265     if (vol_r <= MIXER_MAX_VOLUME) {
 266         mix_r = vol_r;
 267         hph_r = 0;
 268     } else {
 269         mix_r = MIXER_MAX_VOLUME;
 270         hph_r = vol_r - MIXER_MAX_VOLUME;
 271     }
 272
 273     if (vol_l <= MIXER_MAX_VOLUME) {
 274         mix_l = vol_l;
 275         hph_l = 0;
 276     } else {
 277         mix_l = MIXER_MAX_VOLUME;
 278         hph_l = vol_l - MIXER_MAX_VOLUME;
 279     }
 280
 281
 282     as3514_write_masked(AS3514_DAC_R, mix_r, AS3514_VOL_MASK);
 283     as3514_write_masked(AS3514_DAC_L, mix_l, AS3514_VOL_MASK);
 284 #if defined(HAVE_RECORDING) || defined(HAVE_FMRADIO_IN)
 285     as3514_write_masked(AS3514_LINE_IN_R, mix_r, AS3514_VOL_MASK);
 286     as3514_write_masked(AS3514_LINE_IN_L, mix_l, AS3514_VOL_MASK);
 287 #endif
 288     as3514_write_masked(AS3514_HPH_OUT_R, hph_r, AS3514_VOL_MASK);
 289     as3514_write_masked(AS3514_HPH_OUT_L, hph_l, AS3514_VOL_MASK);
 290
 291     audiohw_mute(false);
 292 }
 293
 294 #if 0 /* unused */
 295 void audiohw_set_lineout_vol(int vol_l, int vol_r)
 296 {
 297 #ifdef HAVE_AS3543
 298     /* line out volume is set in the same registers */
 299     audiohw_set_master_vol(vol_l, vol_r);
 300 #else
 301     as3514_write_masked(AS3514_LINE_OUT_R, vol_r, AS3514_VOL_MASK);
 302     as3514_write_masked(AS3514_LINE_OUT_L, vol_l, AS3514_VOL_MASK);
 303 #endif
 304 }
 305 #endif
 306
 307 /* Nice shutdown of AS3514 audio codec */
 308 void audiohw_close(void)
 309 {
 310     /* mute headphones */
 311     audiohw_mute(true);
 312
 313 #ifdef CPU_PP
 314     ascodec_suppressor_on(true);
 315 #endif
 316
 317     /* turn on common */
 318     as3514_clear(AS3514_AUDIOSET3, AUDIOSET3_HPCM_off);
 319
 320     /* turn off everything */
 321     as3514_clear(AS3514_HPH_OUT_L, HPH_OUT_L_HP_ON);
 322     as3514_write(AS3514_AUDIOSET1, 0x0);
 323
 324     /* Allow caps to discharge */
 325     sleep(HZ/4);
 326 }
 327
 328 void audiohw_set_frequency(int fsel)
 329 {
 330 #if defined(SANSA_E200) || defined(SANSA_C200)
 331     if ((unsigned)fsel >= HW_NUM_FREQ)
 332         fsel = HW_FREQ_DEFAULT;
 333
 334     as3514_write(AS3514_PLLMODE, hw_freq_sampr[fsel] < 24000 ?
 335                  PLLMODE_LRCK_8_23 : PLLMODE_LRCK_24_48);
 336
 337     audiohw_set_sampr_dividers(fsel);
 338 #endif
 339     (void)fsel;
 340 }
 341
 342 #if defined(HAVE_RECORDING)
 343 void audiohw_enable_recording(bool source_mic)
 344 {
 345     if (source_mic) {
 346         /* ADCmux = Stereo Microphone */
 347         as3514_write_masked(AS3514_ADC_R, ADC_R_ADCMUX_ST_MIC,
 348                             ADC_R_ADCMUX);
 349
 350         /* MIC1_on, others off */
 351         as3514_write_masked(AS3514_AUDIOSET1, AUDIOSET1_MIC1_on,
 352                             AUDIOSET1_INPUT_MASK);
 353
 354 #if CONFIG_CPU == AS3525v2
 355         /* XXX: why is the microphone supply not needed on other models ?? */
 356         /* Enable supply */
 357         as3514_clear(AS3514_MIC1_L, MIC1_L_M1_SUP_off);
 358 #endif
 359
 360         /* M1_AGC_off */
 361         as3514_clear(AS3514_MIC1_R, MIC1_R_M1_AGC_off);
 362     } else {
 363         /* ADCmux = Line_IN1 or Line_IN2 */
 364         as3514_write_masked(AS3514_ADC_R, ADC_R_ADCMUX_LINE_IN,
 365                             ADC_R_ADCMUX);
 366
 367         /* LIN1_or LIN2 on, rest off */
 368         as3514_write_masked(AS3514_AUDIOSET1, AUDIOSET1_LIN_on,
 369                             AUDIOSET1_INPUT_MASK);
 370
 371 #if CONFIG_CPU == AS3525v2
 372         /* Disable supply */
 373         as3514_set(AS3514_MIC1_L, MIC1_L_M1_SUP_off);
 374 #endif
 375     }
 376
 377     /* ADC_Mute_off */
 378     as3514_set(AS3514_ADC_L, ADC_L_ADC_MUTE_off);
 379     /* ADC_on */
 380     as3514_set(AS3514_AUDIOSET1, AUDIOSET1_ADC_on);
 381 }
 382
 383 void audiohw_disable_recording(void)
 384 {
 385     /* ADC_Mute_on */
 386     as3514_clear(AS3514_ADC_L, ADC_L_ADC_MUTE_off);
 387
 388     /* ADC_off, all input sources off */
 389     as3514_clear(AS3514_AUDIOSET1, AUDIOSET1_ADC_on | AUDIOSET1_INPUT_MASK);
 390 }
 391
 392 /**
 393  * Set recording volume
 394  *
 395  * Line in   : 0 .. 23 .. 31 =>
 396                Volume -34.5 .. +00.0 .. +12.0 dB
 397  * Mic (left): 0 .. 23 .. 39 =>
 398  *             Volume -34.5 .. +00.0 .. +24.0 dB
 399  *
 400  */
 401 void audiohw_set_recvol(int left, int right, int type)
 402 {
 403     switch (type)
 404     {
 405     case AUDIO_GAIN_MIC:
 406     {
 407         /* Combine MIC gains seamlessly with ADC levels */
 408         unsigned int mic1_r;
 409
 410         if (left >= 36) {
 411             /* M1_Gain = +40db, ADR_Vol = +7.5dB .. +12.0 dB =>
 412                +19.5 dB .. +24.0 dB */
 413             left -= 8;
 414             mic1_r = MIC1_R_M1_GAIN_40DB;
 415         } else if (left >= 32) {
 416             /* M1_Gain = +34db, ADR_Vol = +7.5dB .. +12.0 dB =>
 417                +13.5 dB .. +18.0 dB */
 418             left -= 4;
 419             mic1_r = MIC1_R_M1_GAIN_34DB;
 420         } else {
 421             /* M1_Gain = +28db, ADR_Vol = -34.5dB .. +12.0 dB =>
 422                -34.5 dB .. +12.0 dB */
 423             mic1_r = MIC1_R_M1_GAIN_28DB;
 424         }
 425
 426         right = left;
 427
 428         as3514_write_masked(AS3514_MIC1_R, mic1_r, MIC1_R_M1_GAIN);
 429         break;
 430         }
 431     case AUDIO_GAIN_LINEIN:
 432         break;
 433     default:
 434         return;
 435     }
 436
 437     as3514_write_masked(AS3514_ADC_R, right, AS3514_VOL_MASK);
 438     as3514_write_masked(AS3514_ADC_L, left, AS3514_VOL_MASK);
 439 }
 440 #endif /* HAVE_RECORDING */
 441
 442 #if defined(HAVE_RECORDING) || defined(HAVE_FMRADIO_IN)
 443 /**
 444  * Enable line in analog monitoring
 445  *
 446  */
 447 void audiohw_set_monitor(bool enable)
 448 {
 449     if (enable) {
 450         /* select either LIN1 or LIN2 */
 451         as3514_write_masked(AS3514_AUDIOSET1, AUDIOSET1_LIN_on,
 452                             AUDIOSET1_LIN1_on | AUDIOSET1_LIN2_on);
 453         as3514_set(AS3514_LINE_IN_R, LINE_IN1_R_LI1R_MUTE_off);
 454         as3514_set(AS3514_LINE_IN_L, LINE_IN1_L_LI1L_MUTE_off);
 455     }
 456     else {
 457         /* turn off both LIN1 and LIN2 (if present) */
 458         as3514_clear(AS3514_LINE_IN1_R, LINE_IN1_R_LI1R_MUTE_off);
 459         as3514_clear(AS3514_LINE_IN1_L, LINE_IN1_L_LI1L_MUTE_off);
 460 #ifndef HAVE_AS3543
 461         as3514_clear(AS3514_LINE_IN2_R, LINE_IN2_R_LI2R_MUTE_off);
 462         as3514_clear(AS3514_LINE_IN2_L, LINE_IN2_L_LI2L_MUTE_off);
 463 #endif
 464         as3514_clear(AS3514_AUDIOSET1, AUDIOSET1_LIN1_on | AUDIOSET1_LIN2_on);
 465     }
 466 }
 467 #endif /* HAVE_RECORDING || HAVE_FMRADIO_IN */