drivers/media/video/cx18/cx18-av-audio.c

   1 /*
   2  *  cx18 ADEC audio functions
   3  *
   4  *  Derived from cx25840-audio.c
   5  *
   6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   7  *
   8  *  This program is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU General Public License
  10  *  as published by the Free Software Foundation; either version 2
  11  *  of the License, or (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #include "cx18-driver.h"
  25
  26 static int set_audclk_freq(struct cx18 *cx, u32 freq)
  27 {
  28         struct cx18_av_state *state = &cx->av_state;
  29
  30         if (freq != 32000 && freq != 44100 && freq != 48000)
  31                 return -EINVAL;
  32
  33         /* common for all inputs and rates */
  34         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
  35         cx18_av_write(cx, 0x127, 0x50);
  36
  37         if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
  38                 switch (freq) {
  39                 case 32000:
  40                         /* VID_PLL and AUX_PLL */
  41                         cx18_av_write4(cx, 0x108, 0x1006040f);
  42
  43                         /* AUX_PLL_FRAC */
  44                         cx18_av_write4(cx, 0x110, 0x01bb39ee);
  45
  46                         /* src3/4/6_ctl = 0x0801f77f */
  47                         cx18_av_write4(cx, 0x900, 0x0801f77f);
  48                         cx18_av_write4(cx, 0x904, 0x0801f77f);
  49                         cx18_av_write4(cx, 0x90c, 0x0801f77f);
  50                         break;
  51
  52                 case 44100:
  53                         /* VID_PLL and AUX_PLL */
  54                         cx18_av_write4(cx, 0x108, 0x1009040f);
  55
  56                         /* AUX_PLL_FRAC */
  57                         cx18_av_write4(cx, 0x110, 0x00ec6bd6);
  58
  59                         /* src3/4/6_ctl = 0x08016d59 */
  60                         cx18_av_write4(cx, 0x900, 0x08016d59);
  61                         cx18_av_write4(cx, 0x904, 0x08016d59);
  62                         cx18_av_write4(cx, 0x90c, 0x08016d59);
  63                         break;
  64
  65                 case 48000:
  66                         /* VID_PLL and AUX_PLL */
  67                         cx18_av_write4(cx, 0x108, 0x100a040f);
  68
  69                         /* AUX_PLL_FRAC */
  70                         cx18_av_write4(cx, 0x110, 0x0098d6e5);
  71
  72                         /* src3/4/6_ctl = 0x08014faa */
  73                         cx18_av_write4(cx, 0x900, 0x08014faa);
  74                         cx18_av_write4(cx, 0x904, 0x08014faa);
  75                         cx18_av_write4(cx, 0x90c, 0x08014faa);
  76                         break;
  77                 }
  78         } else {
  79                 switch (freq) {
  80                 case 32000:
  81                         /* VID_PLL and AUX_PLL */
  82                         cx18_av_write4(cx, 0x108, 0x1e08040f);
  83
  84                         /* AUX_PLL_FRAC */
  85                         cx18_av_write4(cx, 0x110, 0x012a0869);
  86
  87                         /* src1_ctl = 0x08010000 */
  88                         cx18_av_write4(cx, 0x8f8, 0x08010000);
  89
  90                         /* src3/4/6_ctl = 0x08020000 */
  91                         cx18_av_write4(cx, 0x900, 0x08020000);
  92                         cx18_av_write4(cx, 0x904, 0x08020000);
  93                         cx18_av_write4(cx, 0x90c, 0x08020000);
  94
  95                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
  96                         cx18_av_write(cx, 0x127, 0x54);
  97                         break;
  98
  99                 case 44100:
 100                         /* VID_PLL and AUX_PLL */
 101                         cx18_av_write4(cx, 0x108, 0x1809040f);
 102
 103                         /* AUX_PLL_FRAC */
 104                         cx18_av_write4(cx, 0x110, 0x00ec6bd6);
 105
 106                         /* src1_ctl = 0x08010000 */
 107                         cx18_av_write4(cx, 0x8f8, 0x080160cd);
 108
 109                         /* src3/4/6_ctl = 0x08020000 */
 110                         cx18_av_write4(cx, 0x900, 0x08017385);
 111                         cx18_av_write4(cx, 0x904, 0x08017385);
 112                         cx18_av_write4(cx, 0x90c, 0x08017385);
 113                         break;
 114
 115                 case 48000:
 116                         /* VID_PLL and AUX_PLL */
 117                         cx18_av_write4(cx, 0x108, 0x180a040f);
 118
 119                         /* AUX_PLL_FRAC */
 120                         cx18_av_write4(cx, 0x110, 0x0098d6e5);
 121
 122                         /* src1_ctl = 0x08010000 */
 123                         cx18_av_write4(cx, 0x8f8, 0x08018000);
 124
 125                         /* src3/4/6_ctl = 0x08020000 */
 126                         cx18_av_write4(cx, 0x900, 0x08015555);
 127                         cx18_av_write4(cx, 0x904, 0x08015555);
 128                         cx18_av_write4(cx, 0x90c, 0x08015555);
 129                         break;
 130                 }
 131         }
 132
 133         state->audclk_freq = freq;
 134
 135         return 0;
 136 }
 137
 138 void cx18_av_audio_set_path(struct cx18 *cx)
 139 {
 140         struct cx18_av_state *state = &cx->av_state;
 141
 142         /* stop microcontroller */
 143         cx18_av_and_or(cx, 0x803, ~0x10, 0);
 144
 145         /* assert soft reset */
 146         cx18_av_and_or(cx, 0x810, ~0x1, 0x01);
 147
 148         /* Mute everything to prevent the PFFT! */
 149         cx18_av_write(cx, 0x8d3, 0x1f);
 150
 151         if (state->aud_input == CX18_AV_AUDIO_SERIAL) {
 152                 /* Set Path1 to Serial Audio Input */
 153                 cx18_av_write4(cx, 0x8d0, 0x01011012);
 154
 155                 /* The microcontroller should not be started for the
 156                  * non-tuner inputs: autodetection is specific for
 157                  * TV audio. */
 158         } else {
 159                 /* Set Path1 to Analog Demod Main Channel */
 160                 cx18_av_write4(cx, 0x8d0, 0x1f063870);
 161         }
 162
 163         set_audclk_freq(cx, state->audclk_freq);
 164
 165         /* deassert soft reset */
 166         cx18_av_and_or(cx, 0x810, ~0x1, 0x00);
 167
 168         if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
 169                 /* When the microcontroller detects the
 170                  * audio format, it will unmute the lines */
 171                 cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
 172         }
 173 }
 174
 175 static int get_volume(struct cx18 *cx)
 176 {
 177         /* Volume runs +18dB to -96dB in 1/2dB steps
 178          * change to fit the msp3400 -114dB to +12dB range */
 179
 180         /* check PATH1_VOLUME */
 181         int vol = 228 - cx18_av_read(cx, 0x8d4);
 182         vol = (vol / 2) + 23;
 183         return vol << 9;
 184 }
 185
 186 static void set_volume(struct cx18 *cx, int volume)
 187 {
 188         /* First convert the volume to msp3400 values (0-127) */
 189         int vol = volume >> 9;
 190         /* now scale it up to cx18_av values
 191          * -114dB to -96dB maps to 0
 192          * this should be 19, but in my testing that was 4dB too loud */
 193         if (vol <= 23)
 194                 vol = 0;
 195         else
 196                 vol -= 23;
 197
 198         /* PATH1_VOLUME */
 199         cx18_av_write(cx, 0x8d4, 228 - (vol * 2));
 200 }
 201
 202 static int get_bass(struct cx18 *cx)
 203 {
 204         /* bass is 49 steps +12dB to -12dB */
 205
 206         /* check PATH1_EQ_BASS_VOL */
 207         int bass = cx18_av_read(cx, 0x8d9) & 0x3f;
 208         bass = (((48 - bass) * 0xffff) + 47) / 48;
 209         return bass;
 210 }
 211
 212 static void set_bass(struct cx18 *cx, int bass)
 213 {
 214         /* PATH1_EQ_BASS_VOL */
 215         cx18_av_and_or(cx, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
 216 }
 217
 218 static int get_treble(struct cx18 *cx)
 219 {
 220         /* treble is 49 steps +12dB to -12dB */
 221
 222         /* check PATH1_EQ_TREBLE_VOL */
 223         int treble = cx18_av_read(cx, 0x8db) & 0x3f;
 224         treble = (((48 - treble) * 0xffff) + 47) / 48;
 225         return treble;
 226 }
 227
 228 static void set_treble(struct cx18 *cx, int treble)
 229 {
 230         /* PATH1_EQ_TREBLE_VOL */
 231         cx18_av_and_or(cx, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
 232 }
 233
 234 static int get_balance(struct cx18 *cx)
 235 {
 236         /* balance is 7 bit, 0 to -96dB */
 237
 238         /* check PATH1_BAL_LEVEL */
 239         int balance = cx18_av_read(cx, 0x8d5) & 0x7f;
 240         /* check PATH1_BAL_LEFT */
 241         if ((cx18_av_read(cx, 0x8d5) & 0x80) == 0)
 242                 balance = 0x80 - balance;
 243         else
 244                 balance = 0x80 + balance;
 245         return balance << 8;
 246 }
 247
 248 static void set_balance(struct cx18 *cx, int balance)
 249 {
 250         int bal = balance >> 8;
 251         if (bal > 0x80) {
 252                 /* PATH1_BAL_LEFT */
 253                 cx18_av_and_or(cx, 0x8d5, 0x7f, 0x80);
 254                 /* PATH1_BAL_LEVEL */
 255                 cx18_av_and_or(cx, 0x8d5, ~0x7f, bal & 0x7f);
 256         } else {
 257                 /* PATH1_BAL_LEFT */
 258                 cx18_av_and_or(cx, 0x8d5, 0x7f, 0x00);
 259                 /* PATH1_BAL_LEVEL */
 260                 cx18_av_and_or(cx, 0x8d5, ~0x7f, 0x80 - bal);
 261         }
 262 }
 263
 264 static int get_mute(struct cx18 *cx)
 265 {
 266         /* check SRC1_MUTE_EN */
 267         return cx18_av_read(cx, 0x8d3) & 0x2 ? 1 : 0;
 268 }
 269
 270 static void set_mute(struct cx18 *cx, int mute)
 271 {
 272         struct cx18_av_state *state = &cx->av_state;
 273
 274         if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
 275                 /* Must turn off microcontroller in order to mute sound.
 276                  * Not sure if this is the best method, but it does work.
 277                  * If the microcontroller is running, then it will undo any
 278                  * changes to the mute register. */
 279                 if (mute) {
 280                         /* disable microcontroller */
 281                         cx18_av_and_or(cx, 0x803, ~0x10, 0x00);
 282                         cx18_av_write(cx, 0x8d3, 0x1f);
 283                 } else {
 284                         /* enable microcontroller */
 285                         cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
 286                 }
 287         } else {
 288                 /* SRC1_MUTE_EN */
 289                 cx18_av_and_or(cx, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
 290         }
 291 }
 292
 293 int cx18_av_audio(struct cx18 *cx, unsigned int cmd, void *arg)
 294 {
 295         struct cx18_av_state *state = &cx->av_state;
 296         struct v4l2_control *ctrl = arg;
 297         int retval;
 298
 299         switch (cmd) {
 300         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 301                 if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
 302                         cx18_av_and_or(cx, 0x803, ~0x10, 0);
 303                         cx18_av_write(cx, 0x8d3, 0x1f);
 304                 }
 305                 cx18_av_and_or(cx, 0x810, ~0x1, 1);
 306                 retval = set_audclk_freq(cx, *(u32 *)arg);
 307                 cx18_av_and_or(cx, 0x810, ~0x1, 0);
 308                 if (state->aud_input != CX18_AV_AUDIO_SERIAL)
 309                         cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
 310                 return retval;
 311
 312         case VIDIOC_G_CTRL:
 313                 switch (ctrl->id) {
 314                 case V4L2_CID_AUDIO_VOLUME:
 315                         ctrl->value = get_volume(cx);
 316                         break;
 317                 case V4L2_CID_AUDIO_BASS:
 318                         ctrl->value = get_bass(cx);
 319                         break;
 320                 case V4L2_CID_AUDIO_TREBLE:
 321                         ctrl->value = get_treble(cx);
 322                         break;
 323                 case V4L2_CID_AUDIO_BALANCE:
 324                         ctrl->value = get_balance(cx);
 325                         break;
 326                 case V4L2_CID_AUDIO_MUTE:
 327                         ctrl->value = get_mute(cx);
 328                         break;
 329                 default:
 330                         return -EINVAL;
 331                 }
 332                 break;
 333
 334         case VIDIOC_S_CTRL:
 335                 switch (ctrl->id) {
 336                 case V4L2_CID_AUDIO_VOLUME:
 337                         set_volume(cx, ctrl->value);
 338                         break;
 339                 case V4L2_CID_AUDIO_BASS:
 340                         set_bass(cx, ctrl->value);
 341                         break;
 342                 case V4L2_CID_AUDIO_TREBLE:
 343                         set_treble(cx, ctrl->value);
 344                         break;
 345                 case V4L2_CID_AUDIO_BALANCE:
 346                         set_balance(cx, ctrl->value);
 347                         break;
 348                 case V4L2_CID_AUDIO_MUTE:
 349                         set_mute(cx, ctrl->value);
 350                         break;
 351                 default:
 352                         return -EINVAL;
 353                 }
 354                 break;
 355
 356         default:
 357                 return -EINVAL;
 358         }
 359
 360         return 0;
 361 }