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 inline static int set_audclk_freq(struct i2c_client *client,
  27                                  enum v4l2_audio_clock_freq freq)
  28 {
  29         struct cx25840_state *state = i2c_get_clientdata(client);
  30
  31         /* assert soft reset */
  32         cx25840_and_or(client, 0x810, ~0x1, 0x01);
  33
  34         /* common for all inputs and rates */
  35         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
  36         cx25840_write(client, 0x127, 0x50);
  37
  38         switch (state->audio_input) {
  39         case AUDIO_TUNER:
  40                 switch (freq) {
  41                 case V4L2_AUDCLK_32_KHZ:
  42                         /* VID_PLL and AUX_PLL */
  43                         cx25840_write4(client, 0x108, 0x0f040610);
  44
  45                         /* AUX_PLL_FRAC */
  46                         cx25840_write4(client, 0x110, 0xee39bb01);
  47
  48                         /* src3/4/6_ctl = 0x0801f77f */
  49                         cx25840_write4(client, 0x900, 0x7ff70108);
  50                         cx25840_write4(client, 0x904, 0x7ff70108);
  51                         cx25840_write4(client, 0x90c, 0x7ff70108);
  52                         break;
  53
  54                 case V4L2_AUDCLK_441_KHZ:
  55                         /* VID_PLL and AUX_PLL */
  56                         cx25840_write4(client, 0x108, 0x0f040910);
  57
  58                         /* AUX_PLL_FRAC */
  59                         cx25840_write4(client, 0x110, 0xd66bec00);
  60
  61                         /* src3/4/6_ctl = 0x08016d59 */
  62                         cx25840_write4(client, 0x900, 0x596d0108);
  63                         cx25840_write4(client, 0x904, 0x596d0108);
  64                         cx25840_write4(client, 0x90c, 0x596d0108);
  65                         break;
  66
  67                 case V4L2_AUDCLK_48_KHZ:
  68                         /* VID_PLL and AUX_PLL */
  69                         cx25840_write4(client, 0x108, 0x0f040a10);
  70
  71                         /* AUX_PLL_FRAC */
  72                         cx25840_write4(client, 0x110, 0xe5d69800);
  73
  74                         /* src3/4/6_ctl = 0x08014faa */
  75                         cx25840_write4(client, 0x900, 0xaa4f0108);
  76                         cx25840_write4(client, 0x904, 0xaa4f0108);
  77                         cx25840_write4(client, 0x90c, 0xaa4f0108);
  78                         break;
  79                 }
  80                 break;
  81
  82         case AUDIO_EXTERN_1:
  83         case AUDIO_EXTERN_2:
  84         case AUDIO_INTERN:
  85         case AUDIO_RADIO:
  86                 switch (freq) {
  87                 case V4L2_AUDCLK_32_KHZ:
  88                         /* VID_PLL and AUX_PLL */
  89                         cx25840_write4(client, 0x108, 0x0f04081e);
  90
  91                         /* AUX_PLL_FRAC */
  92                         cx25840_write4(client, 0x110, 0x69082a01);
  93
  94                         /* src1_ctl = 0x08010000 */
  95                         cx25840_write4(client, 0x8f8, 0x00000108);
  96
  97                         /* src3/4/6_ctl = 0x08020000 */
  98                         cx25840_write4(client, 0x900, 0x00000208);
  99                         cx25840_write4(client, 0x904, 0x00000208);
 100                         cx25840_write4(client, 0x90c, 0x00000208);
 101
 102                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
 103                         cx25840_write(client, 0x127, 0x54);
 104                         break;
 105
 106                 case V4L2_AUDCLK_441_KHZ:
 107                         /* VID_PLL and AUX_PLL */
 108                         cx25840_write4(client, 0x108, 0x0f040918);
 109
 110                         /* AUX_PLL_FRAC */
 111                         cx25840_write4(client, 0x110, 0xd66bec00);
 112
 113                         /* src1_ctl = 0x08010000 */
 114                         cx25840_write4(client, 0x8f8, 0xcd600108);
 115
 116                         /* src3/4/6_ctl = 0x08020000 */
 117                         cx25840_write4(client, 0x900, 0x85730108);
 118                         cx25840_write4(client, 0x904, 0x85730108);
 119                         cx25840_write4(client, 0x90c, 0x85730108);
 120                         break;
 121
 122                 case V4L2_AUDCLK_48_KHZ:
 123                         /* VID_PLL and AUX_PLL */
 124                         cx25840_write4(client, 0x108, 0x0f040a18);
 125
 126                         /* AUX_PLL_FRAC */
 127                         cx25840_write4(client, 0x110, 0xe5d69800);
 128
 129                         /* src1_ctl = 0x08010000 */
 130                         cx25840_write4(client, 0x8f8, 0x00800108);
 131
 132                         /* src3/4/6_ctl = 0x08020000 */
 133                         cx25840_write4(client, 0x900, 0x55550108);
 134                         cx25840_write4(client, 0x904, 0x55550108);
 135                         cx25840_write4(client, 0x90c, 0x55550108);
 136                         break;
 137                 }
 138                 break;
 139         }
 140
 141         /* deassert soft reset */
 142         cx25840_and_or(client, 0x810, ~0x1, 0x00);
 143
 144         state->audclk_freq = freq;
 145
 146         return 0;
 147 }
 148
 149 static int set_input(struct i2c_client *client, int audio_input)
 150 {
 151         struct cx25840_state *state = i2c_get_clientdata(client);
 152
 153         cx25840_dbg("set audio input (%d)\n", audio_input);
 154
 155         /* stop microcontroller */
 156         cx25840_and_or(client, 0x803, ~0x10, 0);
 157
 158         /* Mute everything to prevent the PFFT! */
 159         cx25840_write(client, 0x8d3, 0x1f);
 160
 161         switch (audio_input) {
 162         case AUDIO_TUNER:
 163                 /* Set Path1 to Analog Demod Main Channel */
 164                 cx25840_write4(client, 0x8d0, 0x7038061f);
 165
 166                 /* When the microcontroller detects the
 167                  * audio format, it will unmute the lines */
 168                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 169                 break;
 170
 171         case AUDIO_EXTERN_1:
 172         case AUDIO_EXTERN_2:
 173         case AUDIO_INTERN:
 174         case AUDIO_RADIO:
 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                 break;
 182
 183         default:
 184                 cx25840_dbg("Invalid audio input selection %d\n", audio_input);
 185                 return -EINVAL;
 186         }
 187
 188         state->audio_input = audio_input;
 189
 190         return set_audclk_freq(client, state->audclk_freq);
 191 }
 192
 193 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline static void set_mute(struct i2c_client *client, int mute)
 290 {
 291         struct cx25840_state *state = i2c_get_clientdata(client);
 292
 293         if (state->audio_input == AUDIO_TUNER) {
 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 AUDC_SET_INPUT:
 318                 return set_input(client, *(int *)arg);
 319         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 320                 return set_audclk_freq(client, *(enum v4l2_audio_clock_freq *)arg);
 321         case VIDIOC_G_CTRL:
 322                 switch (ctrl->id) {
 323                 case V4L2_CID_AUDIO_VOLUME:
 324                         ctrl->value = get_volume(client);
 325                         break;
 326                 case V4L2_CID_AUDIO_BASS:
 327                         ctrl->value = get_bass(client);
 328                         break;
 329                 case V4L2_CID_AUDIO_TREBLE:
 330                         ctrl->value = get_treble(client);
 331                         break;
 332                 case V4L2_CID_AUDIO_BALANCE:
 333                         ctrl->value = get_balance(client);
 334                         break;
 335                 case V4L2_CID_AUDIO_MUTE:
 336                         ctrl->value = get_mute(client);
 337                         break;
 338                 default:
 339                         return -EINVAL;
 340                 }
 341                 break;
 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         default:
 364                 return -EINVAL;
 365         }
 366
 367         return 0;
 368 }