drivers/media/video/tda9875.c

   1 /*
   2  * For the TDA9875 chip
   3  * (The TDA9875 is used on the Diamond DTV2000 french version
   4  * Other cards probably use these chips as well.)
   5  * This driver will not complain if used with any
   6  * other i2c device with the same address.
   7  *
   8  * Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
   9  * Eric Sandeen
  10  * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
  11  * This code is placed under the terms of the GNU General Public License
  12  * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
  13  * Which was based on tda8425.c by Greg Alexander (c) 1998
  14  *
  15  * OPTIONS:
  16  * debug   - set to 1 if you'd like to see debug messages
  17  *
  18  *  Revision: 0.1 - original version
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/string.h>
  24 #include <linux/timer.h>
  25 #include <linux/delay.h>
  26 #include <linux/errno.h>
  27 #include <linux/slab.h>
  28 #include <linux/i2c.h>
  29 #include <linux/videodev2.h>
  30 #include <media/v4l2-device.h>
  31 #include <media/v4l2-i2c-drv.h>
  32 #include <media/i2c-addr.h>
  33
  34 static int debug; /* insmod parameter */
  35 module_param(debug, int, S_IRUGO | S_IWUSR);
  36 MODULE_LICENSE("GPL");
  37
  38
  39 /* This is a superset of the TDA9875 */
  40 struct tda9875 {
  41         struct v4l2_subdev sd;
  42         int rvol, lvol;
  43         int bass, treble;
  44 };
  45
  46 static inline struct tda9875 *to_state(struct v4l2_subdev *sd)
  47 {
  48         return container_of(sd, struct tda9875, sd);
  49 }
  50
  51 #define dprintk  if (debug) printk
  52
  53 /* The TDA9875 is made by Philips Semiconductor
  54  * http://www.semiconductors.philips.com
  55  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  56  *
  57  */
  58
  59                 /* subaddresses for TDA9875 */
  60 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  61 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  62 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  63 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  64
  65 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  66 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  67 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  68 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  69
  70 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  71 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  72 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  73 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  74 #define TDA9875_MVR         0x1b  /* Main volume droite */
  75 #define TDA9875_MBA         0x1d  /* Main Basse */
  76 #define TDA9875_MTR         0x1e  /* Main treble */
  77 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  78 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  79 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  80 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  81 #define TDA9875_ATR         0x23  /* Auxilary treble */
  82
  83 #define TDA9875_MSR         0x02  /* Monitor select register */
  84 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  85 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  86 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  87 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  88 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  89 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
  90 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
  91 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
  92 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
  93
  94 /* values */
  95 #define TDA9875_MUTE_ON     0xff /* general mute */
  96 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
  97
  98
  99
 100 /* Begin code */
 101
 102 static int tda9875_write(struct v4l2_subdev *sd, int subaddr, unsigned char val)
 103 {
 104         struct i2c_client *client = v4l2_get_subdevdata(sd);
 105         unsigned char buffer[2];
 106
 107         v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
 108         buffer[0] = subaddr;
 109         buffer[1] = val;
 110         if (2 != i2c_master_send(client, buffer, 2)) {
 111                 v4l2_warn(sd, "I/O error, trying (write %d 0x%x)\n",
 112                        subaddr, val);
 113                 return -1;
 114         }
 115         return 0;
 116 }
 117
 118
 119 static int i2c_read_register(struct i2c_client *client, int addr, int reg)
 120 {
 121         unsigned char write[1];
 122         unsigned char read[1];
 123         struct i2c_msg msgs[2] = {
 124                 { addr, 0,        1, write },
 125                 { addr, I2C_M_RD, 1, read  }
 126         };
 127
 128         write[0] = reg;
 129
 130         if (2 != i2c_transfer(client->adapter, msgs, 2)) {
 131                 v4l_warn(client, "I/O error (read2)\n");
 132                 return -1;
 133         }
 134         v4l_dbg(1, debug, client, "chip_read2: reg%d=0x%x\n", reg, read[0]);
 135         return read[0];
 136 }
 137
 138 static void tda9875_set(struct v4l2_subdev *sd)
 139 {
 140         struct tda9875 *tda = to_state(sd);
 141         unsigned char a;
 142
 143         v4l2_dbg(1, debug, sd, "tda9875_set(%04x,%04x,%04x,%04x)\n",
 144                 tda->lvol, tda->rvol, tda->bass, tda->treble);
 145
 146         a = tda->lvol & 0xff;
 147         tda9875_write(sd, TDA9875_MVL, a);
 148         a =tda->rvol & 0xff;
 149         tda9875_write(sd, TDA9875_MVR, a);
 150         a =tda->bass & 0xff;
 151         tda9875_write(sd, TDA9875_MBA, a);
 152         a =tda->treble  & 0xff;
 153         tda9875_write(sd, TDA9875_MTR, a);
 154 }
 155
 156 static void do_tda9875_init(struct v4l2_subdev *sd)
 157 {
 158         struct tda9875 *t = to_state(sd);
 159
 160         v4l2_dbg(1, debug, sd, "In tda9875_init\n");
 161         tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
 162         tda9875_write(sd, TDA9875_MSR, 0x03);    /* Monitor 0b00000XXX*/
 163         tda9875_write(sd, TDA9875_C1MSB, 0x00);  /*Car1(FM) MSB XMHz*/
 164         tda9875_write(sd, TDA9875_C1MIB, 0x00);  /*Car1(FM) MIB XMHz*/
 165         tda9875_write(sd, TDA9875_C1LSB, 0x00);  /*Car1(FM) LSB XMHz*/
 166         tda9875_write(sd, TDA9875_C2MSB, 0x00);  /*Car2(NICAM) MSB XMHz*/
 167         tda9875_write(sd, TDA9875_C2MIB, 0x00);  /*Car2(NICAM) MIB XMHz*/
 168         tda9875_write(sd, TDA9875_C2LSB, 0x00);  /*Car2(NICAM) LSB XMHz*/
 169         tda9875_write(sd, TDA9875_DCR, 0x00);    /*Demod config 0x00*/
 170         tda9875_write(sd, TDA9875_DEEM, 0x44);   /*DE-Emph 0b0100 0100*/
 171         tda9875_write(sd, TDA9875_FMAT, 0x00);   /*FM Matrix reg 0x00*/
 172         tda9875_write(sd, TDA9875_SC1, 0x00);    /* SCART 1 (SC1)*/
 173         tda9875_write(sd, TDA9875_SC2, 0x01);    /* SCART 2 (sc2)*/
 174
 175         tda9875_write(sd, TDA9875_CH1V, 0x10);  /* Channel volume 1 mute*/
 176         tda9875_write(sd, TDA9875_CH2V, 0x10);  /* Channel volume 2 mute */
 177         tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
 178         tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
 179         tda9875_write(sd, TDA9875_LOSR, 0x00);  /* line out (in:mono)*/
 180         tda9875_write(sd, TDA9875_AER, 0x00);   /*06 Effect (AVL+PSEUDO) */
 181         tda9875_write(sd, TDA9875_MCS, 0x44);   /* Main ch select (DAC) */
 182         tda9875_write(sd, TDA9875_MVL, 0x03);   /* Vol Main left 10dB */
 183         tda9875_write(sd, TDA9875_MVR, 0x03);   /* Vol Main right 10dB*/
 184         tda9875_write(sd, TDA9875_MBA, 0x00);   /* Main Bass Main 0dB*/
 185         tda9875_write(sd, TDA9875_MTR, 0x00);   /* Main Treble Main 0dB*/
 186         tda9875_write(sd, TDA9875_ACS, 0x44);   /* Aux chan select (dac)*/
 187         tda9875_write(sd, TDA9875_AVL, 0x00);   /* Vol Aux left 0dB*/
 188         tda9875_write(sd, TDA9875_AVR, 0x00);   /* Vol Aux right 0dB*/
 189         tda9875_write(sd, TDA9875_ABA, 0x00);   /* Aux Bass Main 0dB*/
 190         tda9875_write(sd, TDA9875_ATR, 0x00);   /* Aux Aigus Main 0dB*/
 191
 192         tda9875_write(sd, TDA9875_MUT, 0xcc);   /* General mute  */
 193
 194         t->lvol = t->rvol = 0;          /* 0dB */
 195         t->bass = 0;                    /* 0dB */
 196         t->treble = 0;                  /* 0dB */
 197         tda9875_set(sd);
 198 }
 199
 200
 201 static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 202 {
 203         struct tda9875 *t = to_state(sd);
 204
 205         switch (ctrl->id) {
 206         case V4L2_CID_AUDIO_VOLUME:
 207         {
 208                 int left = (t->lvol+84)*606;
 209                 int right = (t->rvol+84)*606;
 210
 211                 ctrl->value=max(left,right);
 212                 return 0;
 213         }
 214         case V4L2_CID_AUDIO_BALANCE:
 215         {
 216                 int left = (t->lvol+84)*606;
 217                 int right = (t->rvol+84)*606;
 218                 int volume = max(left,right);
 219                 int balance = (32768*min(left,right))/
 220                               (volume ? volume : 1);
 221                 ctrl->value=(left<right)?
 222                         (65535-balance) : balance;
 223                 return 0;
 224         }
 225         case V4L2_CID_AUDIO_BASS:
 226                 ctrl->value = (t->bass+12)*2427;    /* min -12 max +15 */
 227                 return 0;
 228         case V4L2_CID_AUDIO_TREBLE:
 229                 ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */
 230                 return 0;
 231         }
 232         return -EINVAL;
 233 }
 234
 235 static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 236 {
 237         struct tda9875 *t = to_state(sd);
 238         int chvol = 0, volume = 0, balance = 0, left, right;
 239
 240         switch (ctrl->id) {
 241         case V4L2_CID_AUDIO_VOLUME:
 242                 left = (t->lvol+84)*606;
 243                 right = (t->rvol+84)*606;
 244
 245                 volume = max(left,right);
 246                 balance = (32768*min(left,right))/
 247                               (volume ? volume : 1);
 248                 balance =(left<right)?
 249                         (65535-balance) : balance;
 250
 251                 volume = ctrl->value;
 252
 253                 chvol=1;
 254                 break;
 255         case V4L2_CID_AUDIO_BALANCE:
 256                 left = (t->lvol+84)*606;
 257                 right = (t->rvol+84)*606;
 258
 259                 volume=max(left,right);
 260
 261                 balance = ctrl->value;
 262
 263                 chvol=1;
 264                 break;
 265         case V4L2_CID_AUDIO_BASS:
 266                 t->bass = ((ctrl->value/2400)-12) & 0xff;
 267                 if (t->bass > 15)
 268                         t->bass = 15;
 269                 if (t->bass < -12)
 270                         t->bass = -12 & 0xff;
 271                 break;
 272         case V4L2_CID_AUDIO_TREBLE:
 273                 t->treble = ((ctrl->value/2700)-12) & 0xff;
 274                 if (t->treble > 12)
 275                         t->treble = 12;
 276                 if (t->treble < -12)
 277                         t->treble = -12 & 0xff;
 278                 break;
 279         default:
 280                 return -EINVAL;
 281         }
 282
 283         if (chvol) {
 284                 left = (min(65536 - balance,32768) *
 285                         volume) / 32768;
 286                 right = (min(balance,32768) *
 287                                 volume) / 32768;
 288                 t->lvol = ((left/606)-84) & 0xff;
 289                 if (t->lvol > 24)
 290                         t->lvol = 24;
 291                 if (t->lvol < -84)
 292                         t->lvol = -84 & 0xff;
 293
 294                 t->rvol = ((right/606)-84) & 0xff;
 295                 if (t->rvol > 24)
 296                         t->rvol = 24;
 297                 if (t->rvol < -84)
 298                         t->rvol = -84 & 0xff;
 299         }
 300
 301         tda9875_set(sd);
 302         return 0;
 303 }
 304
 305 static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 306 {
 307         switch (qc->id) {
 308         case V4L2_CID_AUDIO_VOLUME:
 309                 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
 310         case V4L2_CID_AUDIO_BASS:
 311         case V4L2_CID_AUDIO_TREBLE:
 312                 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
 313         }
 314         return -EINVAL;
 315 }
 316
 317 /* ----------------------------------------------------------------------- */
 318
 319 static const struct v4l2_subdev_core_ops tda9875_core_ops = {
 320         .queryctrl = tda9875_queryctrl,
 321         .g_ctrl = tda9875_g_ctrl,
 322         .s_ctrl = tda9875_s_ctrl,
 323 };
 324
 325 static const struct v4l2_subdev_ops tda9875_ops = {
 326         .core = &tda9875_core_ops,
 327 };
 328
 329 /* ----------------------------------------------------------------------- */
 330
 331
 332 /* *********************** *
 333  * i2c interface functions *
 334  * *********************** */
 335
 336 static int tda9875_checkit(struct i2c_client *client, int addr)
 337 {
 338         int dic, rev;
 339
 340         dic = i2c_read_register(client, addr, 254);
 341         rev = i2c_read_register(client, addr, 255);
 342
 343         if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
 344                 v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\n",
 345                         dic == 0 ? "" : "A", rev, addr << 1);
 346                 return 1;
 347         }
 348         v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n",
 349                         addr << 1, dic, rev);
 350         return 0;
 351 }
 352
 353 static int tda9875_probe(struct i2c_client *client,
 354                         const struct i2c_device_id *id)
 355 {
 356         struct tda9875 *t;
 357         struct v4l2_subdev *sd;
 358
 359         v4l_info(client, "chip found @ 0x%02x (%s)\n",
 360                         client->addr << 1, client->adapter->name);
 361
 362         if (!tda9875_checkit(client, client->addr))
 363                 return -ENODEV;
 364
 365         t = kzalloc(sizeof(*t), GFP_KERNEL);
 366         if (!t)
 367                 return -ENOMEM;
 368         sd = &t->sd;
 369         v4l2_i2c_subdev_init(sd, client, &tda9875_ops);
 370
 371         do_tda9875_init(sd);
 372         return 0;
 373 }
 374
 375 static int tda9875_remove(struct i2c_client *client)
 376 {
 377         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 378
 379         do_tda9875_init(sd);
 380         v4l2_device_unregister_subdev(sd);
 381         kfree(to_state(sd));
 382         return 0;
 383 }
 384
 385 static const struct i2c_device_id tda9875_id[] = {
 386         { "tda9875", 0 },
 387         { }
 388 };
 389 MODULE_DEVICE_TABLE(i2c, tda9875_id);
 390
 391 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 392         .name = "tda9875",
 393         .probe = tda9875_probe,
 394         .remove = tda9875_remove,
 395         .id_table = tda9875_id,
 396 };