err.no Git - linux-2.6/blob - drivers/media/video/cx25840/cx25840-audio.c

   1 /* cx25840 audio functions
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License
   5  * as published by the Free Software Foundation; either version 2
   6  * of the License, or (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16  */
  17
  18
  19 #include <linux/videodev2.h>
  20 #include <linux/i2c.h>
  21 #include <media/v4l2-common.h>
  22 #include <media/cx25840.h>
  23
  24 #include "cx25840-core.h"
  25
  26 static int set_audclk_freq(struct i2c_client *client, u32 freq)
  27 {
  28         struct cx25840_state *state = i2c_get_clientdata(client);
  29
  30         if (freq != 32000 && freq != 44100 && freq != 48000)
  31                 return -EINVAL;
  32
  33         /* assert soft reset */
  34         if (!state->is_cx25836)
  35                 cx25840_and_or(client, 0x810, ~0x1, 0x01);
  36
  37         /* common for all inputs and rates */
  38         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
  39         cx25840_write(client, 0x127, 0x50);
  40
  41         if (state->aud_input != CX25840_AUDIO_SERIAL) {
  42                 switch (freq) {
  43                 case 32000:
  44                         /* VID_PLL and AUX_PLL */
  45                         cx25840_write4(client, 0x108, 0x0f040610);
  46
  47                         /* AUX_PLL_FRAC */
  48                         cx25840_write4(client, 0x110, 0xee39bb01);
  49
  50                         if (state->is_cx25836)
  51                                 break;
  52
  53                         /* src3/4/6_ctl = 0x0801f77f */
  54                         cx25840_write4(client, 0x900, 0x7ff70108);
  55                         cx25840_write4(client, 0x904, 0x7ff70108);
  56                         cx25840_write4(client, 0x90c, 0x7ff70108);
  57                         break;
  58
  59                 case 44100:
  60                         /* VID_PLL and AUX_PLL */
  61                         cx25840_write4(client, 0x108, 0x0f040910);
  62
  63                         /* AUX_PLL_FRAC */
  64                         cx25840_write4(client, 0x110, 0xd66bec00);
  65
  66                         if (state->is_cx25836)
  67                                 break;
  68
  69                         /* src3/4/6_ctl = 0x08016d59 */
  70                         cx25840_write4(client, 0x900, 0x596d0108);
  71                         cx25840_write4(client, 0x904, 0x596d0108);
  72                         cx25840_write4(client, 0x90c, 0x596d0108);
  73                         break;
  74
  75                 case 48000:
  76                         /* VID_PLL and AUX_PLL */
  77                         cx25840_write4(client, 0x108, 0x0f040a10);
  78
  79                         /* AUX_PLL_FRAC */
  80                         cx25840_write4(client, 0x110, 0xe5d69800);
  81
  82                         if (state->is_cx25836)
  83                                 break;
  84
  85                         /* src3/4/6_ctl = 0x08014faa */
  86                         cx25840_write4(client, 0x900, 0xaa4f0108);
  87                         cx25840_write4(client, 0x904, 0xaa4f0108);
  88                         cx25840_write4(client, 0x90c, 0xaa4f0108);
  89                         break;
  90                 }
  91         } else {
  92                 switch (freq) {
  93                 case 32000:
  94                         /* VID_PLL and AUX_PLL */
  95                         cx25840_write4(client, 0x108, 0x0f04081e);
  96
  97                         /* AUX_PLL_FRAC */
  98                         cx25840_write4(client, 0x110, 0x69082a01);
  99
 100                         if (state->is_cx25836)
 101                                 break;
 102
 103                         /* src1_ctl = 0x08010000 */
 104                         cx25840_write4(client, 0x8f8, 0x00000108);
 105
 106                         /* src3/4/6_ctl = 0x08020000 */
 107                         cx25840_write4(client, 0x900, 0x00000208);
 108                         cx25840_write4(client, 0x904, 0x00000208);
 109                         cx25840_write4(client, 0x90c, 0x00000208);
 110
 111                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
 112                         cx25840_write(client, 0x127, 0x54);
 113                         break;
 114
 115                 case 44100:
 116                         /* VID_PLL and AUX_PLL */
 117                         cx25840_write4(client, 0x108, 0x0f040918);
 118
 119                         /* AUX_PLL_FRAC */
 120                         cx25840_write4(client, 0x110, 0xd66bec00);
 121
 122                         if (state->is_cx25836)
 123                                 break;
 124
 125                         /* src1_ctl = 0x08010000 */
 126                         cx25840_write4(client, 0x8f8, 0xcd600108);
 127
 128                         /* src3/4/6_ctl = 0x08020000 */
 129                         cx25840_write4(client, 0x900, 0x85730108);
 130                         cx25840_write4(client, 0x904, 0x85730108);
 131                         cx25840_write4(client, 0x90c, 0x85730108);
 132                         break;
 133
 134                 case 48000:
 135                         /* VID_PLL and AUX_PLL */
 136                         cx25840_write4(client, 0x108, 0x0f040a18);
 137
 138                         /* AUX_PLL_FRAC */
 139                         cx25840_write4(client, 0x110, 0xe5d69800);
 140
 141                         if (state->is_cx25836)
 142                                 break;
 143
 144                         /* src1_ctl = 0x08010000 */
 145                         cx25840_write4(client, 0x8f8, 0x00800108);
 146
 147                         /* src3/4/6_ctl = 0x08020000 */
 148                         cx25840_write4(client, 0x900, 0x55550108);
 149                         cx25840_write4(client, 0x904, 0x55550108);
 150                         cx25840_write4(client, 0x90c, 0x55550108);
 151                         break;
 152                 }
 153         }
 154
 155         /* deassert soft reset */
 156         if (!state->is_cx25836)
 157                 cx25840_and_or(client, 0x810, ~0x1, 0x00);
 158
 159         state->audclk_freq = freq;
 160
 161         return 0;
 162 }
 163
 164 void cx25840_audio_set_path(struct i2c_client *client)
 165 {
 166         struct cx25840_state *state = i2c_get_clientdata(client);
 167
 168         /* stop microcontroller */
 169         cx25840_and_or(client, 0x803, ~0x10, 0);
 170
 171         /* Mute everything to prevent the PFFT! */
 172         cx25840_write(client, 0x8d3, 0x1f);
 173
 174         if (state->aud_input == CX25840_AUDIO_SERIAL) {
 175                 /* Set Path1 to Serial Audio Input */
 176                 cx25840_write4(client, 0x8d0, 0x12100101);
 177
 178                 /* The microcontroller should not be started for the
 179                  * non-tuner inputs: autodetection is specific for
 180                  * TV audio. */
 181         } else {
 182                 /* Set Path1 to Analog Demod Main Channel */
 183                 cx25840_write4(client, 0x8d0, 0x7038061f);
 184
 185                 /* When the microcontroller detects the
 186                  * audio format, it will unmute the lines */
 187                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 188         }
 189
 190         set_audclk_freq(client, state->audclk_freq);
 191 }
 192
 193 static int get_volume(struct i2c_client *client)
 194 {
 195         /* Volume runs +18dB to -96dB in 1/2dB steps
 196          * change to fit the msp3400 -114dB to +12dB range */
 197
 198         /* check PATH1_VOLUME */
 199         int vol = 228 - cx25840_read(client, 0x8d4);
 200         vol = (vol / 2) + 23;
 201         return vol << 9;
 202 }
 203
 204 static void set_volume(struct i2c_client *client, int volume)
 205 {
 206         /* First convert the volume to msp3400 values (0-127) */
 207         int vol = volume >> 9;
 208         /* now scale it up to cx25840 values
 209          * -114dB to -96dB maps to 0
 210          * this should be 19, but in my testing that was 4dB too loud */
 211         if (vol <= 23) {
 212                 vol = 0;
 213         } else {
 214                 vol -= 23;
 215         }
 216
 217         /* PATH1_VOLUME */
 218         cx25840_write(client, 0x8d4, 228 - (vol * 2));
 219 }
 220
 221 static int get_bass(struct i2c_client *client)
 222 {
 223         /* bass is 49 steps +12dB to -12dB */
 224
 225         /* check PATH1_EQ_BASS_VOL */
 226         int bass = cx25840_read(client, 0x8d9) & 0x3f;
 227         bass = (((48 - bass) * 0xffff) + 47) / 48;
 228         return bass;
 229 }
 230
 231 static void set_bass(struct i2c_client *client, int bass)
 232 {
 233         /* PATH1_EQ_BASS_VOL */
 234         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
 235 }
 236
 237 static int get_treble(struct i2c_client *client)
 238 {
 239         /* treble is 49 steps +12dB to -12dB */
 240
 241         /* check PATH1_EQ_TREBLE_VOL */
 242         int treble = cx25840_read(client, 0x8db) & 0x3f;
 243         treble = (((48 - treble) * 0xffff) + 47) / 48;
 244         return treble;
 245 }
 246
 247 static void set_treble(struct i2c_client *client, int treble)
 248 {
 249         /* PATH1_EQ_TREBLE_VOL */
 250         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
 251 }
 252
 253 static int get_balance(struct i2c_client *client)
 254 {
 255         /* balance is 7 bit, 0 to -96dB */
 256
 257         /* check PATH1_BAL_LEVEL */
 258         int balance = cx25840_read(client, 0x8d5) & 0x7f;
 259         /* check PATH1_BAL_LEFT */
 260         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
 261                 balance = 0x80 - balance;
 262         else
 263                 balance = 0x80 + balance;
 264         return balance << 8;
 265 }
 266
 267 static void set_balance(struct i2c_client *client, int balance)
 268 {
 269         int bal = balance >> 8;
 270         if (bal > 0x80) {
 271                 /* PATH1_BAL_LEFT */
 272                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
 273                 /* PATH1_BAL_LEVEL */
 274                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
 275         } else {
 276                 /* PATH1_BAL_LEFT */
 277                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
 278                 /* PATH1_BAL_LEVEL */
 279                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
 280         }
 281 }
 282
 283 static int get_mute(struct i2c_client *client)
 284 {
 285         /* check SRC1_MUTE_EN */
 286         return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
 287 }
 288
 289 static void set_mute(struct i2c_client *client, int mute)
 290 {
 291         struct cx25840_state *state = i2c_get_clientdata(client);
 292
 293         if (state->aud_input != CX25840_AUDIO_SERIAL) {
 294                 /* Must turn off microcontroller in order to mute sound.
 295                  * Not sure if this is the best method, but it does work.
 296                  * If the microcontroller is running, then it will undo any
 297                  * changes to the mute register. */
 298                 if (mute) {
 299                         /* disable microcontroller */
 300                         cx25840_and_or(client, 0x803, ~0x10, 0x00);
 301                         cx25840_write(client, 0x8d3, 0x1f);
 302                 } else {
 303                         /* enable microcontroller */
 304                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
 305                 }
 306         } else {
 307                 /* SRC1_MUTE_EN */
 308                 cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
 309         }
 310 }
 311
 312 int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
 313 {
 314         struct v4l2_control *ctrl = arg;
 315
 316         switch (cmd) {
 317         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 318                 return set_audclk_freq(client, *(u32 *)arg);
 319
 320         case VIDIOC_G_CTRL:
 321                 switch (ctrl->id) {
 322                 case V4L2_CID_AUDIO_VOLUME:
 323                         ctrl->value = get_volume(client);
 324                         break;
 325                 case V4L2_CID_AUDIO_BASS:
 326                         ctrl->value = get_bass(client);
 327                         break;
 328                 case V4L2_CID_AUDIO_TREBLE:
 329                         ctrl->value = get_treble(client);
 330                         break;
 331                 case V4L2_CID_AUDIO_BALANCE:
 332                         ctrl->value = get_balance(client);
 333                         break;
 334                 case V4L2_CID_AUDIO_MUTE:
 335                         ctrl->value = get_mute(client);
 336                         break;
 337                 default:
 338                         return -EINVAL;
 339                 }
 340                 break;
 341
 342         case VIDIOC_S_CTRL:
 343                 switch (ctrl->id) {
 344                 case V4L2_CID_AUDIO_VOLUME:
 345                         set_volume(client, ctrl->value);
 346                         break;
 347                 case V4L2_CID_AUDIO_BASS:
 348                         set_bass(client, ctrl->value);
 349                         break;
 350                 case V4L2_CID_AUDIO_TREBLE:
 351                         set_treble(client, ctrl->value);
 352                         break;
 353                 case V4L2_CID_AUDIO_BALANCE:
 354                         set_balance(client, ctrl->value);
 355                         break;
 356                 case V4L2_CID_AUDIO_MUTE:
 357                         set_mute(client, ctrl->value);
 358                         break;
 359                 default:
 360                         return -EINVAL;
 361                 }
 362                 break;
 363
 364         default:
 365                 return -EINVAL;
 366         }
 367
 368         return 0;
 369 }