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, -12,  12,   0},
  37     [SOUND_TREBLE]        = {"dB", 0,  1, -12,  12,   0},
  38     [SOUND_BALANCE]       = {"%",  0,  1,-100, 100,   0},
  39     [SOUND_CHANNELS]      = {"",   0,  1,   0,   5,   0},
  40     [SOUND_STEREO_WIDTH]  = {"%",  0,  5,   0, 250, 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     [SOUND_BASS_CUTOFF]   = {"",   0,  1,   1,   4,   1},
  45     [SOUND_TREBLE_CUTOFF] = {"",   0,  1,   1,   4,   1},
  46 };
  47
  48 /* shadow registers */
  49 unsigned int eq1_reg;
  50 unsigned int eq5_reg;
  51
  52 /* convert tenth of dB volume (-57..6) to master volume register value */
  53 int tenthdb2master(int db)
  54 {
  55     /* +6 to -57dB in 1dB steps == 64 levels = 6 bits */
  56     /* 0111111 == +6dB  (0x3f) = 63) */
  57     /* 0111001 == 0dB   (0x39) = 57) */
  58     /* 0000001 == -56dB (0x01) = */
  59     /* 0000000 == -57dB (0x00) */
  60
  61     /* 1000000 == Mute (0x40) */
  62
  63     if (db < VOLUME_MIN) {
  64         return 0x40;
  65     } else {
  66         return((db/10)+57);
  67     }
  68 }
  69
  70 /* convert tenth of dB volume (-780..0) to mixer volume register value */
  71 int tenthdb2mixer(int db)
  72 {
  73     if (db < -660)                 /* 1.5 dB steps */
  74         return (2640 - db) / 15;
  75     else if (db < -600)            /* 0.75 dB steps */
  76         return (990 - db) * 2 / 15;
  77     else if (db < -460)            /* 0.5 dB steps */
  78         return (460 - db) / 5;
  79     else                           /* 0.25 dB steps */
  80         return -db * 2 / 5;
  81 }
  82
  83 #define IPOD_PCM_LEVEL 0x65       /* -6dB */
  84
  85 //#define BASSCTRL   0x
  86 //#define TREBCTRL   0x0b
  87
  88 /* Silently enable / disable audio output */
  89 void audiohw_enable_output(bool enable)
  90 {
  91     if (enable)
  92     {
  93         /* reset the I2S controller into known state */
  94         i2s_reset();
  95
  96         /* TODO: Review the power-up sequence to prevent pops */
  97
  98         wmcodec_write(RESET, 0x1ff);    /*Reset*/
  99
 100         wmcodec_write(PWRMGMT1, 0x2b);
 101         wmcodec_write(PWRMGMT2, 0x180);
 102         wmcodec_write(PWRMGMT3, 0x6f);
 103
 104         wmcodec_write(AINTFCE, 0x10);
 105         wmcodec_write(CLKCTRL, 0x49);
 106
 107         wmcodec_write(OUTCTRL, 1);
 108
 109         /* The iPod can handle multiple frequencies, but fix at 44.1KHz
 110            for now */
 111         audiohw_set_sample_rate(WM8758_44100HZ);
 112
 113         wmcodec_write(LOUTMIX,0x1); /* Enable mixer */
 114         wmcodec_write(ROUTMIX,0x1); /* Enable mixer */
 115         audiohw_mute(0);
 116     } else {
 117         audiohw_mute(1);
 118     }
 119 }
 120
 121 int audiohw_set_master_vol(int vol_l, int vol_r)
 122 {
 123     /* OUT1 */
 124     wmcodec_write(LOUT1VOL, 0x080 | vol_l);
 125     wmcodec_write(ROUT1VOL, 0x180 | vol_r);
 126
 127     return 0;
 128 }
 129
 130 int audiohw_set_lineout_vol(int vol_l, int vol_r)
 131 {
 132     /* OUT2 */
 133     wmcodec_write(LOUT2VOL, vol_l);
 134     wmcodec_write(ROUT2VOL, 0x100 | vol_r);
 135
 136     return 0;
 137 }
 138
 139 int audiohw_set_mixer_vol(int channel1, int channel2)
 140 {
 141     (void)channel1;
 142     (void)channel2;
 143
 144     return 0;
 145 }
 146
 147 void audiohw_set_bass(int value)
 148 {
 149     eq1_reg = (eq1_reg & ~EQ_GAIN_MASK) | EQ_GAIN_VALUE(value);
 150     wmcodec_write(EQ1, 0x100 | eq1_reg);
 151 }
 152
 153 void audiohw_set_bass_cutoff(int value)
 154 {
 155     eq1_reg = (eq1_reg & ~EQ_CUTOFF_MASK) | EQ_CUTOFF_VALUE(value);
 156     wmcodec_write(EQ1, 0x100 | eq1_reg);
 157 }
 158
 159 void audiohw_set_treble(int value)
 160 {
 161     eq5_reg = (eq5_reg & ~EQ_GAIN_MASK) | EQ_GAIN_VALUE(value);
 162     wmcodec_write(EQ5, eq5_reg);
 163 }
 164
 165 void audiohw_set_treble_cutoff(int value)
 166 {
 167     eq5_reg = (eq5_reg & ~EQ_CUTOFF_MASK) | EQ_CUTOFF_VALUE(value);
 168     wmcodec_write(EQ5, eq5_reg);
 169 }
 170
 171 void audiohw_mute(bool mute)
 172 {
 173     if (mute)
 174     {
 175         /* Set DACMU = 1 to soft-mute the audio DACs. */
 176         wmcodec_write(DACCTRL, 0x40);
 177     } else {
 178         /* Set DACMU = 0 to soft-un-mute the audio DACs. */
 179         wmcodec_write(DACCTRL, 0x0);
 180     }
 181 }
 182
 183 /* Nice shutdown of WM8758 codec */
 184 void audiohw_close(void)
 185 {
 186     audiohw_mute(1);
 187
 188     wmcodec_write(PWRMGMT3, 0x0);
 189
 190     wmcodec_write(PWRMGMT1, 0x0);
 191
 192     wmcodec_write(PWRMGMT2, 0x40);
 193 }
 194
 195 /* Change the order of the noise shaper, 5th order is recommended above 32kHz */
 196 void audiohw_set_nsorder(int order)
 197 {
 198     (void)order;
 199 }
 200
 201 /* Note: Disable output before calling this function */
 202 void audiohw_set_sample_rate(int sampling_control)
 203 {
 204     /**** We force 44.1KHz for now. ****/
 205     (void)sampling_control;
 206
 207     /* set clock div */
 208     wmcodec_write(CLKCTRL, 1 | (0 << 2) | (2 << 5));
 209
 210     /* setup PLL for MHZ=11.2896 */
 211     wmcodec_write(PLLN, (1 << 4) | 0x7);
 212     wmcodec_write(PLLK1, 0x21);
 213     wmcodec_write(PLLK2, 0x161);
 214     wmcodec_write(PLLK3, 0x26);
 215
 216     /* set clock div */
 217     wmcodec_write(CLKCTRL, 1 | (1 << 2) | (2 << 5) | (1 << 8));
 218
 219     /* set srate */
 220     wmcodec_write(SRATECTRL, (0 << 1));
 221 }
 222
 223 void audiohw_enable_recording(bool source_mic)
 224 {
 225     (void)source_mic; /* We only have a line-in (I think) */
 226
 227     /* reset the I2S controller into known state */
 228     i2s_reset();
 229
 230     wmcodec_write(RESET, 0x1ff);    /*Reset*/
 231
 232     wmcodec_write(PWRMGMT1, 0x2b);
 233     wmcodec_write(PWRMGMT2, 0x18f);  /* Enable ADC - 0x0c enables left/right PGA input, and 0x03 turns on power to the ADCs */
 234     wmcodec_write(PWRMGMT3, 0x6f);
 235
 236     wmcodec_write(AINTFCE, 0x10);
 237     wmcodec_write(CLKCTRL, 0x49);
 238
 239     wmcodec_write(OUTCTRL, 1);
 240
 241     /* The iPod can handle multiple frequencies, but fix at 44.1KHz
 242        for now */
 243     audiohw_set_sample_rate(WM8758_44100HZ);
 244
 245     wmcodec_write(INCTRL,0x44);  /* Connect L2 and R2 inputs */
 246
 247     /* Set L2/R2_2BOOSTVOL to 0db (bits 4-6) */
 248     /* 000 = disabled
 249        001 = -12dB
 250        010 = -9dB
 251        011 = -6dB
 252        100 = -3dB
 253        101 = 0dB
 254        110 = 3dB
 255        111 = 6dB
 256     */
 257     wmcodec_write(LADCBOOST,0x50);
 258     wmcodec_write(RADCBOOST,0x50);
 259
 260     /* Set L/R input PGA Volume to 0db */
 261     //    wm8758_write(LINPGAVOL,0x3f);
 262     //    wm8758_write(RINPGAVOL,0x13f);
 263
 264     /* Enable monitoring */
 265     wmcodec_write(LOUTMIX,0x17); /* Enable output mixer - BYPL2LMIX @ 0db*/
 266     wmcodec_write(ROUTMIX,0x17); /* Enable output mixer - BYPR2RMIX @ 0db*/
 267
 268     audiohw_mute(0);
 269 }
 270
 271 void audiohw_disable_recording(void) {
 272     audiohw_mute(1);
 273
 274     wmcodec_write(PWRMGMT3, 0x0);
 275
 276     wmcodec_write(PWRMGMT1, 0x0);
 277
 278     wmcodec_write(PWRMGMT2, 0x40);
 279 }
 280
 281 void audiohw_set_recvol(int left, int right, int type) {
 282
 283     (void)left;
 284     (void)right;
 285     (void)type;
 286 }
 287
 288 void audiohw_set_monitor(bool enable) {
 289
 290     (void)enable;
 291 }
 292