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/i2c-addr.h>
  32
  33 static int debug; /* insmod parameter */
  34 module_param(debug, int, S_IRUGO | S_IWUSR);
  35 MODULE_LICENSE("GPL");
  36
  37
  38 /* This is a superset of the TDA9875 */
  39 struct tda9875 {
  40         struct v4l2_subdev sd;
  41         int rvol, lvol;
  42         int bass, treble;
  43 };
  44
  45 static inline struct tda9875 *to_state(struct v4l2_subdev *sd)
  46 {
  47         return container_of(sd, struct tda9875, sd);
  48 }
  49
  50 #define dprintk  if (debug) printk
  51
  52 /* The TDA9875 is made by Philips Semiconductor
  53  * http://www.semiconductors.philips.com
  54  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  55  *
  56  */
  57
  58                 /* subaddresses for TDA9875 */
  59 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  60 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  61 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  62 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  63
  64 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  65 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  66 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  67 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  68
  69 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  70 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  71 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  72 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  73 #define TDA9875_MVR         0x1b  /* Main volume droite */
  74 #define TDA9875_MBA         0x1d  /* Main Basse */
  75 #define TDA9875_MTR         0x1e  /* Main treble */
  76 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  77 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  78 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  79 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  80 #define TDA9875_ATR         0x23  /* Auxilary treble */
  81
  82 #define TDA9875_MSR         0x02  /* Monitor select register */
  83 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  84 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  85 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  86 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  87 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  88 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
  89 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
  90 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
  91 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
  92
  93 /* values */
  94 #define TDA9875_MUTE_ON     0xff /* general mute */
  95 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
  96
  97
  98
  99 /* Begin code */
 100
 101 static int tda9875_write(struct v4l2_subdev *sd, int subaddr, unsigned char val)
 102 {
 103         struct i2c_client *client = v4l2_get_subdevdata(sd);
 104         unsigned char buffer[2];
 105
 106         v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
 107         buffer[0] = subaddr;
 108         buffer[1] = val;
 109         if (2 != i2c_master_send(client, buffer, 2)) {
 110                 v4l2_warn(sd, "I/O error, trying (write %d 0x%x)\n",
 111                        subaddr, val);
 112                 return -1;
 113         }
 114         return 0;
 115 }
 116
 117
 118 static int i2c_read_register(struct i2c_client *client, int addr, int reg)
 119 {
 120         unsigned char write[1];
 121         unsigned char read[1];
 122         struct i2c_msg msgs[2] = {
 123                 { addr, 0,        1, write },
 124                 { addr, I2C_M_RD, 1, read  }
 125         };
 126
 127         write[0] = reg;
 128
 129         if (2 != i2c_transfer(client->adapter, msgs, 2)) {
 130                 v4l_warn(client, "I/O error (read2)\n");
 131                 return -1;
 132         }
 133         v4l_dbg(1, debug, client, "chip_read2: reg%d=0x%x\n", reg, read[0]);
 134         return read[0];
 135 }
 136
 137 static void tda9875_set(struct v4l2_subdev *sd)
 138 {
 139         struct tda9875 *tda = to_state(sd);
 140         unsigned char a;
 141
 142         v4l2_dbg(1, debug, sd, "tda9875_set(%04x,%04x,%04x,%04x)\n",
 143                 tda->lvol, tda->rvol, tda->bass, tda->treble);
 144
 145         a = tda->lvol & 0xff;
 146         tda9875_write(sd, TDA9875_MVL, a);
 147         a =tda->rvol & 0xff;
 148         tda9875_write(sd, TDA9875_MVR, a);
 149         a =tda->bass & 0xff;
 150         tda9875_write(sd, TDA9875_MBA, a);
 151         a =tda->treble  & 0xff;
 152         tda9875_write(sd, TDA9875_MTR, a);
 153 }
 154
 155 static void do_tda9875_init(struct v4l2_subdev *sd)
 156 {
 157         struct tda9875 *t = to_state(sd);
 158
 159         v4l2_dbg(1, debug, sd, "In tda9875_init\n");
 160         tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
 161         tda9875_write(sd, TDA9875_MSR, 0x03);    /* Monitor 0b00000XXX*/
 162         tda9875_write(sd, TDA9875_C1MSB, 0x00);  /*Car1(FM) MSB XMHz*/
 163         tda9875_write(sd, TDA9875_C1MIB, 0x00);  /*Car1(FM) MIB XMHz*/
 164         tda9875_write(sd, TDA9875_C1LSB, 0x00);  /*Car1(FM) LSB XMHz*/
 165         tda9875_write(sd, TDA9875_C2MSB, 0x00);  /*Car2(NICAM) MSB XMHz*/
 166         tda9875_write(sd, TDA9875_C2MIB, 0x00);  /*Car2(NICAM) MIB XMHz*/
 167         tda9875_write(sd, TDA9875_C2LSB, 0x00);  /*Car2(NICAM) LSB XMHz*/
 168         tda9875_write(sd, TDA9875_DCR, 0x00);    /*Demod config 0x00*/
 169         tda9875_write(sd, TDA9875_DEEM, 0x44);   /*DE-Emph 0b0100 0100*/
 170         tda9875_write(sd, TDA9875_FMAT, 0x00);   /*FM Matrix reg 0x00*/
 171         tda9875_write(sd, TDA9875_SC1, 0x00);    /* SCART 1 (SC1)*/
 172         tda9875_write(sd, TDA9875_SC2, 0x01);    /* SCART 2 (sc2)*/
 173
 174         tda9875_write(sd, TDA9875_CH1V, 0x10);  /* Channel volume 1 mute*/
 175         tda9875_write(sd, TDA9875_CH2V, 0x10);  /* Channel volume 2 mute */
 176         tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
 177         tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
 178         tda9875_write(sd, TDA9875_LOSR, 0x00);  /* line out (in:mono)*/
 179         tda9875_write(sd, TDA9875_AER, 0x00);   /*06 Effect (AVL+PSEUDO) */
 180         tda9875_write(sd, TDA9875_MCS, 0x44);   /* Main ch select (DAC) */
 181         tda9875_write(sd, TDA9875_MVL, 0x03);   /* Vol Main left 10dB */
 182         tda9875_write(sd, TDA9875_MVR, 0x03);   /* Vol Main right 10dB*/
 183         tda9875_write(sd, TDA9875_MBA, 0x00);   /* Main Bass Main 0dB*/
 184         tda9875_write(sd, TDA9875_MTR, 0x00);   /* Main Treble Main 0dB*/
 185         tda9875_write(sd, TDA9875_ACS, 0x44);   /* Aux chan select (dac)*/
 186         tda9875_write(sd, TDA9875_AVL, 0x00);   /* Vol Aux left 0dB*/
 187         tda9875_write(sd, TDA9875_AVR, 0x00);   /* Vol Aux right 0dB*/
 188         tda9875_write(sd, TDA9875_ABA, 0x00);   /* Aux Bass Main 0dB*/
 189         tda9875_write(sd, TDA9875_ATR, 0x00);   /* Aux Aigus Main 0dB*/
 190
 191         tda9875_write(sd, TDA9875_MUT, 0xcc);   /* General mute  */
 192
 193         t->lvol = t->rvol = 0;          /* 0dB */
 194         t->bass = 0;                    /* 0dB */
 195         t->treble = 0;                  /* 0dB */
 196         tda9875_set(sd);
 197 }
 198
 199
 200 static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 201 {
 202         struct tda9875 *t = to_state(sd);
 203
 204         switch (ctrl->id) {
 205         case V4L2_CID_AUDIO_VOLUME:
 206         {
 207                 int left = (t->lvol+84)*606;
 208                 int right = (t->rvol+84)*606;
 209
 210                 ctrl->value=max(left,right);
 211                 return 0;
 212         }
 213         case V4L2_CID_AUDIO_BALANCE:
 214         {
 215                 int left = (t->lvol+84)*606;
 216                 int right = (t->rvol+84)*606;
 217                 int volume = max(left,right);
 218                 int balance = (32768*min(left,right))/
 219                               (volume ? volume : 1);
 220                 ctrl->value=(left<right)?
 221                         (65535-balance) : balance;
 222                 return 0;
 223         }
 224         case V4L2_CID_AUDIO_BASS:
 225                 ctrl->value = (t->bass+12)*2427;    /* min -12 max +15 */
 226                 return 0;
 227         case V4L2_CID_AUDIO_TREBLE:
 228                 ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */
 229                 return 0;
 230         }
 231         return -EINVAL;
 232 }
 233
 234 static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 235 {
 236         struct tda9875 *t = to_state(sd);
 237         int chvol = 0, volume = 0, balance = 0, left, right;
 238
 239         switch (ctrl->id) {
 240         case V4L2_CID_AUDIO_VOLUME:
 241                 left = (t->lvol+84)*606;
 242                 right = (t->rvol+84)*606;
 243
 244                 volume = max(left,right);
 245                 balance = (32768*min(left,right))/
 246                               (volume ? volume : 1);
 247                 balance =(left<right)?
 248                         (65535-balance) : balance;
 249
 250                 volume = ctrl->value;
 251
 252                 chvol=1;
 253                 break;
 254         case V4L2_CID_AUDIO_BALANCE:
 255                 left = (t->lvol+84)*606;
 256                 right = (t->rvol+84)*606;
 257
 258                 volume=max(left,right);
 259
 260                 balance = ctrl->value;
 261
 262                 chvol=1;
 263                 break;
 264         case V4L2_CID_AUDIO_BASS:
 265                 t->bass = ((ctrl->value/2400)-12) & 0xff;
 266                 if (t->bass > 15)
 267                         t->bass = 15;
 268                 if (t->bass < -12)
 269                         t->bass = -12 & 0xff;
 270                 break;
 271         case V4L2_CID_AUDIO_TREBLE:
 272                 t->treble = ((ctrl->value/2700)-12) & 0xff;
 273                 if (t->treble > 12)
 274                         t->treble = 12;
 275                 if (t->treble < -12)
 276                         t->treble = -12 & 0xff;
 277                 break;
 278         default:
 279                 return -EINVAL;
 280         }
 281
 282         if (chvol) {
 283                 left = (min(65536 - balance,32768) *
 284                         volume) / 32768;
 285                 right = (min(balance,32768) *
 286                                 volume) / 32768;
 287                 t->lvol = ((left/606)-84) & 0xff;
 288                 if (t->lvol > 24)
 289                         t->lvol = 24;
 290                 if (t->lvol < -84)
 291                         t->lvol = -84 & 0xff;
 292
 293                 t->rvol = ((right/606)-84) & 0xff;
 294                 if (t->rvol > 24)
 295                         t->rvol = 24;
 296                 if (t->rvol < -84)
 297                         t->rvol = -84 & 0xff;
 298         }
 299
 300         tda9875_set(sd);
 301         return 0;
 302 }
 303
 304 static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 305 {
 306         switch (qc->id) {
 307         case V4L2_CID_AUDIO_VOLUME:
 308                 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
 309         case V4L2_CID_AUDIO_BASS:
 310         case V4L2_CID_AUDIO_TREBLE:
 311                 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
 312         }
 313         return -EINVAL;
 314 }
 315
 316 /* ----------------------------------------------------------------------- */
 317
 318 static const struct v4l2_subdev_core_ops tda9875_core_ops = {
 319         .queryctrl = tda9875_queryctrl,
 320         .g_ctrl = tda9875_g_ctrl,
 321         .s_ctrl = tda9875_s_ctrl,
 322 };
 323
 324 static const struct v4l2_subdev_ops tda9875_ops = {
 325         .core = &tda9875_core_ops,
 326 };
 327
 328 /* ----------------------------------------------------------------------- */
 329
 330
 331 /* *********************** *
 332  * i2c interface functions *
 333  * *********************** */
 334
 335 static int tda9875_checkit(struct i2c_client *client, int addr)
 336 {
 337         int dic, rev;
 338
 339         dic = i2c_read_register(client, addr, 254);
 340         rev = i2c_read_register(client, addr, 255);
 341
 342         if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
 343                 v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\n",
 344                         dic == 0 ? "" : "A", rev, addr << 1);
 345                 return 1;
 346         }
 347         v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n",
 348                         addr << 1, dic, rev);
 349         return 0;
 350 }
 351
 352 static int tda9875_probe(struct i2c_client *client,
 353                         const struct i2c_device_id *id)
 354 {
 355         struct tda9875 *t;
 356         struct v4l2_subdev *sd;
 357
 358         v4l_info(client, "chip found @ 0x%02x (%s)\n",
 359                         client->addr << 1, client->adapter->name);
 360
 361         if (!tda9875_checkit(client, client->addr))
 362                 return -ENODEV;
 363
 364         t = kzalloc(sizeof(*t), GFP_KERNEL);
 365         if (!t)
 366                 return -ENOMEM;
 367         sd = &t->sd;
 368         v4l2_i2c_subdev_init(sd, client, &tda9875_ops);
 369
 370         do_tda9875_init(sd);
 371         return 0;
 372 }
 373
 374 static int tda9875_remove(struct i2c_client *client)
 375 {
 376         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 377
 378         do_tda9875_init(sd);
 379         v4l2_device_unregister_subdev(sd);
 380         kfree(to_state(sd));
 381         return 0;
 382 }
 383
 384 static const struct i2c_device_id tda9875_id[] = {
 385         { "tda9875", 0 },
 386         { }
 387 };
 388 MODULE_DEVICE_TABLE(i2c, tda9875_id);
 389
 390 static struct i2c_driver tda9875_driver = {
 391         .driver = {
 392                 .owner  = THIS_MODULE,
 393                 .name   = "tda9875",
 394         },
 395         .probe          = tda9875_probe,
 396         .remove         = tda9875_remove,
 397         .id_table       = tda9875_id,
 398 };
 399
 400 static __init int init_tda9875(void)
 401 {
 402         return i2c_add_driver(&tda9875_driver);
 403 }
 404
 405 static __exit void exit_tda9875(void)
 406 {
 407         i2c_del_driver(&tda9875_driver);
 408 }
 409
 410 module_init(init_tda9875);
 411 module_exit(exit_tda9875);