firmware/drivers/audio/wm8758.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Driver for WM8758 audio codec - based on datasheet for WM8983
  11  *
  12  * Based on code from the ipodlinux project - http://ipodlinux.org/
  13  * Adapted for Rockbox in December 2005
  14  *
  15  * Original file: linux/arch/armnommu/mach-ipod/audio.c
  16  *
  17  * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
  18  *
  19  * All files in this archive are subject to the GNU General Public License.
  20  * See the file COPYING in the source tree root for full license agreement.
  21  *
  22  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  23  * KIND, either express or implied.
  24  *
  25  ****************************************************************************/
  26 #include "system.h"
  27 #include "string.h"
  28 #include "audio.h"
  29
  30 #include "wmcodec.h"
  31 #include "audiohw.h"
  32 #include "i2s.h"
  33
  34 const struct sound_settings_info audiohw_settings[] = {
  35     [SOUND_VOLUME]        = {"dB", 0,  1, -58,   6, -25},
  36     [SOUND_BASS]          = {"dB", 0,  1,  -6,   9,   0},
  37     [SOUND_TREBLE]        = {"dB", 0,  1,  -6,   9,   0},
  38     [SOUND_BALANCE]       = {"%",  0,  1,-100, 100,   0},
  39     [SOUND_CHANNELS]      = {"",   0,  1,   0,   5,   0},
  40     [SOUND_STEREO_WIDTH]  = {"%",  0,  1,   0, 255, 100},
  41     [SOUND_LEFT_GAIN]     = {"dB", 1,  1,-128,  96,   0},
  42     [SOUND_RIGHT_GAIN]    = {"dB", 1,  1,-128,  96,   0},
  43     [SOUND_MIC_GAIN]      = {"dB", 1,  1,-128, 108,  16},
  44 };
  45
  46 /* convert tenth of dB volume (-57..6) to master volume register value */
  47 int tenthdb2master(int db)
  48 {
  49     /* +6 to -57dB in 1dB steps == 64 levels = 6 bits */
  50     /* 0111111 == +6dB  (0x3f) = 63) */
  51     /* 0111001 == 0dB   (0x39) = 57) */
  52     /* 0000001 == -56dB (0x01) = */
  53     /* 0000000 == -57dB (0x00) */
  54
  55     /* 1000000 == Mute (0x40) */
  56
  57     if (db < VOLUME_MIN) {
  58         return 0x40;
  59     } else {
  60         return((db/10)+57);
  61     }
  62 }
  63
  64 /* convert tenth of dB volume (-780..0) to mixer volume register value */
  65 int tenthdb2mixer(int db)
  66 {
  67     if (db < -660)                 /* 1.5 dB steps */
  68         return (2640 - db) / 15;
  69     else if (db < -600)            /* 0.75 dB steps */
  70         return (990 - db) * 2 / 15;
  71     else if (db < -460)            /* 0.5 dB steps */
  72         return (460 - db) / 5;
  73     else                           /* 0.25 dB steps */
  74         return -db * 2 / 5;
  75 }
  76
  77 void audiohw_reset(void);
  78
  79 #define IPOD_PCM_LEVEL 0x65       /* -6dB */
  80
  81 //#define BASSCTRL   0x
  82 //#define TREBCTRL   0x0b
  83
  84 /* Silently enable / disable audio output */
  85 void audiohw_enable_output(bool enable)
  86 {
  87     if (enable)
  88     {
  89         /* reset the I2S controller into known state */
  90         i2s_reset();
  91
  92         /* TODO: Review the power-up sequence to prevent pops */
  93
  94         wmcodec_write(RESET, 0x1ff);    /*Reset*/
  95
  96         wmcodec_write(PWRMGMT1, 0x2b);
  97         wmcodec_write(PWRMGMT2, 0x180);
  98         wmcodec_write(PWRMGMT3, 0x6f);
  99
 100         wmcodec_write(AINTFCE, 0x10);
 101         wmcodec_write(CLKCTRL, 0x49);
 102
 103         wmcodec_write(OUTCTRL, 1);
 104
 105         /* The iPod can handle multiple frequencies, but fix at 44.1KHz
 106            for now */
 107         audiohw_set_sample_rate(WM8758_44100HZ);
 108
 109         wmcodec_write(LOUTMIX,0x1); /* Enable mixer */
 110         wmcodec_write(ROUTMIX,0x1); /* Enable mixer */
 111         audiohw_mute(0);
 112     } else {
 113         audiohw_mute(1);
 114     }
 115 }
 116
 117 int audiohw_set_master_vol(int vol_l, int vol_r)
 118 {
 119     /* OUT1 */
 120     wmcodec_write(LOUT1VOL, 0x080 | vol_l);
 121     wmcodec_write(ROUT1VOL, 0x180 | vol_r);
 122
 123     return 0;
 124 }
 125
 126 int audiohw_set_lineout_vol(int vol_l, int vol_r)
 127 {
 128     /* OUT2 */
 129     wmcodec_write(LOUT2VOL, vol_l);
 130     wmcodec_write(ROUT2VOL, 0x100 | vol_r);
 131
 132     return 0;
 133 }
 134
 135 int audiohw_set_mixer_vol(int channel1, int channel2)
 136 {
 137     (void)channel1;
 138     (void)channel2;
 139
 140     return 0;
 141 }
 142
 143 /* We are using Linear bass control */
 144 void audiohw_set_bass(int value)
 145 {
 146     (void)value;
 147 }
 148
 149 void audiohw_set_treble(int value)
 150 {
 151     (void)value;
 152 }
 153
 154 int audiohw_mute(int mute)
 155 {
 156     if (mute)
 157     {
 158         /* Set DACMU = 1 to soft-mute the audio DACs. */
 159         wmcodec_write(DACCTRL, 0x40);
 160     } else {
 161         /* Set DACMU = 0 to soft-un-mute the audio DACs. */
 162         wmcodec_write(DACCTRL, 0x0);
 163     }
 164
 165     return 0;
 166 }
 167
 168 /* Nice shutdown of WM8758 codec */
 169 void audiohw_close(void)
 170 {
 171     audiohw_mute(1);
 172
 173     wmcodec_write(PWRMGMT3, 0x0);
 174
 175     wmcodec_write(PWRMGMT1, 0x0);
 176
 177     wmcodec_write(PWRMGMT2, 0x40);
 178 }
 179
 180 /* Change the order of the noise shaper, 5th order is recommended above 32kHz */
 181 void audiohw_set_nsorder(int order)
 182 {
 183     (void)order;
 184 }
 185
 186 /* Note: Disable output before calling this function */
 187 void audiohw_set_sample_rate(int sampling_control)
 188 {
 189     /**** We force 44.1KHz for now. ****/
 190     (void)sampling_control;
 191
 192     /* set clock div */
 193     wmcodec_write(CLKCTRL, 1 | (0 << 2) | (2 << 5));
 194
 195     /* setup PLL for MHZ=11.2896 */
 196     wmcodec_write(PLLN, (1 << 4) | 0x7);
 197     wmcodec_write(PLLK1, 0x21);
 198     wmcodec_write(PLLK2, 0x161);
 199     wmcodec_write(PLLK3, 0x26);
 200
 201     /* set clock div */
 202     wmcodec_write(CLKCTRL, 1 | (1 << 2) | (2 << 5) | (1 << 8));
 203
 204     /* set srate */
 205     wmcodec_write(SRATECTRL, (0 << 1));
 206 }
 207
 208 void audiohw_enable_recording(bool source_mic)
 209 {
 210     (void)source_mic; /* We only have a line-in (I think) */
 211
 212     /* reset the I2S controller into known state */
 213     i2s_reset();
 214
 215     wmcodec_write(RESET, 0x1ff);    /*Reset*/
 216
 217     wmcodec_write(PWRMGMT1, 0x2b);
 218     wmcodec_write(PWRMGMT2, 0x18f);  /* Enable ADC - 0x0c enables left/right PGA input, and 0x03 turns on power to the ADCs */
 219     wmcodec_write(PWRMGMT3, 0x6f);
 220
 221     wmcodec_write(AINTFCE, 0x10);
 222     wmcodec_write(CLKCTRL, 0x49);
 223
 224     wmcodec_write(OUTCTRL, 1);
 225
 226     /* The iPod can handle multiple frequencies, but fix at 44.1KHz
 227        for now */
 228     audiohw_set_sample_rate(WM8758_44100HZ);
 229
 230     wmcodec_write(INCTRL,0x44);  /* Connect L2 and R2 inputs */
 231
 232     /* Set L2/R2_2BOOSTVOL to 0db (bits 4-6) */
 233     /* 000 = disabled
 234        001 = -12dB
 235        010 = -9dB
 236        011 = -6dB
 237        100 = -3dB
 238        101 = 0dB
 239        110 = 3dB
 240        111 = 6dB
 241     */
 242     wmcodec_write(LADCBOOST,0x50);
 243     wmcodec_write(RADCBOOST,0x50);
 244
 245     /* Set L/R input PGA Volume to 0db */
 246     //    wm8758_write(LINPGAVOL,0x3f);
 247     //    wm8758_write(RINPGAVOL,0x13f);
 248
 249     /* Enable monitoring */
 250     wmcodec_write(LOUTMIX,0x17); /* Enable output mixer - BYPL2LMIX @ 0db*/
 251     wmcodec_write(ROUTMIX,0x17); /* Enable output mixer - BYPR2RMIX @ 0db*/
 252
 253     audiohw_mute(0);
 254 }
 255
 256 void audiohw_disable_recording(void) {
 257     audiohw_mute(1);
 258
 259     wmcodec_write(PWRMGMT3, 0x0);
 260
 261     wmcodec_write(PWRMGMT1, 0x0);
 262
 263     wmcodec_write(PWRMGMT2, 0x40);
 264 }
 265
 266 void audiohw_set_recvol(int left, int right, int type) {
 267
 268     (void)left;
 269     (void)right;
 270     (void)type;
 271 }
 272
 273 void audiohw_set_monitor(int enable) {
 274
 275     (void)enable;
 276 }
 277
 278 void audiohw_set_equalizer_band(int band, int freq, int bw, int gain)
 279 {
 280     unsigned int eq = 0;
 281
 282     /* Band 1..3 are peak filters */
 283     if (band >= 1 && band <= 3) {
 284         eq |= (bw << 8);
 285     }
 286
 287     eq |= (freq << 5);
 288     eq |= 12 - gain;
 289
 290     if (band == 0) {
 291         wmcodec_write(EQ1, eq | 0x100); /* Always apply EQ to the DAC path */
 292     } else if (band == 1) {
 293         wmcodec_write(EQ2, eq);
 294     } else if (band == 2) {
 295         wmcodec_write(EQ3, eq);
 296     } else if (band == 3) {
 297         wmcodec_write(EQ4, eq);
 298     } else if (band == 4) {
 299         wmcodec_write(EQ5, eq);
 300     }
 301 }