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