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-legacy.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 /* Addresses to scan */
  39 static unsigned short normal_i2c[] =  {
  40     I2C_ADDR_TDA9875 >> 1,
  41     I2C_CLIENT_END
  42 };
  43
  44 I2C_CLIENT_INSMOD;
  45
  46 /* This is a superset of the TDA9875 */
  47 struct tda9875 {
  48         struct v4l2_subdev sd;
  49         int rvol, lvol;
  50         int bass, treble;
  51 };
  52
  53 static inline struct tda9875 *to_state(struct v4l2_subdev *sd)
  54 {
  55         return container_of(sd, struct tda9875, sd);
  56 }
  57
  58 #define dprintk  if (debug) printk
  59
  60 /* The TDA9875 is made by Philips Semiconductor
  61  * http://www.semiconductors.philips.com
  62  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  63  *
  64  */
  65
  66                 /* subaddresses for TDA9875 */
  67 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  68 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  69 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  70 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  71
  72 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  73 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  74 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  75 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  76
  77 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  78 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  79 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  80 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  81 #define TDA9875_MVR         0x1b  /* Main volume droite */
  82 #define TDA9875_MBA         0x1d  /* Main Basse */
  83 #define TDA9875_MTR         0x1e  /* Main treble */
  84 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  85 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  86 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  87 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  88 #define TDA9875_ATR         0x23  /* Auxilary treble */
  89
  90 #define TDA9875_MSR         0x02  /* Monitor select register */
  91 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  92 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  93 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  94 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  95 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  96 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
  97 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
  98 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
  99 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
 100
 101 /* values */
 102 #define TDA9875_MUTE_ON     0xff /* general mute */
 103 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
 104
 105
 106
 107 /* Begin code */
 108
 109 static int tda9875_write(struct v4l2_subdev *sd, int subaddr, unsigned char val)
 110 {
 111         struct i2c_client *client = v4l2_get_subdevdata(sd);
 112         unsigned char buffer[2];
 113
 114         v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
 115         buffer[0] = subaddr;
 116         buffer[1] = val;
 117         if (2 != i2c_master_send(client, buffer, 2)) {
 118                 v4l2_warn(sd, "I/O error, trying (write %d 0x%x)\n",
 119                        subaddr, val);
 120                 return -1;
 121         }
 122         return 0;
 123 }
 124
 125
 126 static int i2c_read_register(struct i2c_client *client, int addr, int reg)
 127 {
 128         unsigned char write[1];
 129         unsigned char read[1];
 130         struct i2c_msg msgs[2] = {
 131                 { addr, 0,        1, write },
 132                 { addr, I2C_M_RD, 1, read  }
 133         };
 134
 135         write[0] = reg;
 136
 137         if (2 != i2c_transfer(client->adapter, msgs, 2)) {
 138                 v4l_warn(client, "I/O error (read2)\n");
 139                 return -1;
 140         }
 141         v4l_dbg(1, debug, client, "chip_read2: reg%d=0x%x\n", reg, read[0]);
 142         return read[0];
 143 }
 144
 145 static void tda9875_set(struct v4l2_subdev *sd)
 146 {
 147         struct tda9875 *tda = to_state(sd);
 148         unsigned char a;
 149
 150         v4l2_dbg(1, debug, sd, "tda9875_set(%04x,%04x,%04x,%04x)\n",
 151                 tda->lvol, tda->rvol, tda->bass, tda->treble);
 152
 153         a = tda->lvol & 0xff;
 154         tda9875_write(sd, TDA9875_MVL, a);
 155         a =tda->rvol & 0xff;
 156         tda9875_write(sd, TDA9875_MVR, a);
 157         a =tda->bass & 0xff;
 158         tda9875_write(sd, TDA9875_MBA, a);
 159         a =tda->treble  & 0xff;
 160         tda9875_write(sd, TDA9875_MTR, a);
 161 }
 162
 163 static void do_tda9875_init(struct v4l2_subdev *sd)
 164 {
 165         struct tda9875 *t = to_state(sd);
 166
 167         v4l2_dbg(1, debug, sd, "In tda9875_init\n");
 168         tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
 169         tda9875_write(sd, TDA9875_MSR, 0x03);    /* Monitor 0b00000XXX*/
 170         tda9875_write(sd, TDA9875_C1MSB, 0x00);  /*Car1(FM) MSB XMHz*/
 171         tda9875_write(sd, TDA9875_C1MIB, 0x00);  /*Car1(FM) MIB XMHz*/
 172         tda9875_write(sd, TDA9875_C1LSB, 0x00);  /*Car1(FM) LSB XMHz*/
 173         tda9875_write(sd, TDA9875_C2MSB, 0x00);  /*Car2(NICAM) MSB XMHz*/
 174         tda9875_write(sd, TDA9875_C2MIB, 0x00);  /*Car2(NICAM) MIB XMHz*/
 175         tda9875_write(sd, TDA9875_C2LSB, 0x00);  /*Car2(NICAM) LSB XMHz*/
 176         tda9875_write(sd, TDA9875_DCR, 0x00);    /*Demod config 0x00*/
 177         tda9875_write(sd, TDA9875_DEEM, 0x44);   /*DE-Emph 0b0100 0100*/
 178         tda9875_write(sd, TDA9875_FMAT, 0x00);   /*FM Matrix reg 0x00*/
 179         tda9875_write(sd, TDA9875_SC1, 0x00);    /* SCART 1 (SC1)*/
 180         tda9875_write(sd, TDA9875_SC2, 0x01);    /* SCART 2 (sc2)*/
 181
 182         tda9875_write(sd, TDA9875_CH1V, 0x10);  /* Channel volume 1 mute*/
 183         tda9875_write(sd, TDA9875_CH2V, 0x10);  /* Channel volume 2 mute */
 184         tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
 185         tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
 186         tda9875_write(sd, TDA9875_LOSR, 0x00);  /* line out (in:mono)*/
 187         tda9875_write(sd, TDA9875_AER, 0x00);   /*06 Effect (AVL+PSEUDO) */
 188         tda9875_write(sd, TDA9875_MCS, 0x44);   /* Main ch select (DAC) */
 189         tda9875_write(sd, TDA9875_MVL, 0x03);   /* Vol Main left 10dB */
 190         tda9875_write(sd, TDA9875_MVR, 0x03);   /* Vol Main right 10dB*/
 191         tda9875_write(sd, TDA9875_MBA, 0x00);   /* Main Bass Main 0dB*/
 192         tda9875_write(sd, TDA9875_MTR, 0x00);   /* Main Treble Main 0dB*/
 193         tda9875_write(sd, TDA9875_ACS, 0x44);   /* Aux chan select (dac)*/
 194         tda9875_write(sd, TDA9875_AVL, 0x00);   /* Vol Aux left 0dB*/
 195         tda9875_write(sd, TDA9875_AVR, 0x00);   /* Vol Aux right 0dB*/
 196         tda9875_write(sd, TDA9875_ABA, 0x00);   /* Aux Bass Main 0dB*/
 197         tda9875_write(sd, TDA9875_ATR, 0x00);   /* Aux Aigus Main 0dB*/
 198
 199         tda9875_write(sd, TDA9875_MUT, 0xcc);   /* General mute  */
 200
 201         t->lvol = t->rvol = 0;          /* 0dB */
 202         t->bass = 0;                    /* 0dB */
 203         t->treble = 0;                  /* 0dB */
 204         tda9875_set(sd);
 205 }
 206
 207
 208 static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 209 {
 210         struct tda9875 *t = to_state(sd);
 211
 212         switch (ctrl->id) {
 213         case V4L2_CID_AUDIO_VOLUME:
 214         {
 215                 int left = (t->lvol+84)*606;
 216                 int right = (t->rvol+84)*606;
 217
 218                 ctrl->value=max(left,right);
 219                 return 0;
 220         }
 221         case V4L2_CID_AUDIO_BALANCE:
 222         {
 223                 int left = (t->lvol+84)*606;
 224                 int right = (t->rvol+84)*606;
 225                 int volume = max(left,right);
 226                 int balance = (32768*min(left,right))/
 227                               (volume ? volume : 1);
 228                 ctrl->value=(left<right)?
 229                         (65535-balance) : balance;
 230                 return 0;
 231         }
 232         case V4L2_CID_AUDIO_BASS:
 233                 ctrl->value = (t->bass+12)*2427;    /* min -12 max +15 */
 234                 return 0;
 235         case V4L2_CID_AUDIO_TREBLE:
 236                 ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */
 237                 return 0;
 238         }
 239         return -EINVAL;
 240 }
 241
 242 static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 243 {
 244         struct tda9875 *t = to_state(sd);
 245         int chvol = 0, volume = 0, balance = 0, left, right;
 246
 247         switch (ctrl->id) {
 248         case V4L2_CID_AUDIO_VOLUME:
 249                 left = (t->lvol+84)*606;
 250                 right = (t->rvol+84)*606;
 251
 252                 volume = max(left,right);
 253                 balance = (32768*min(left,right))/
 254                               (volume ? volume : 1);
 255                 balance =(left<right)?
 256                         (65535-balance) : balance;
 257
 258                 volume = ctrl->value;
 259
 260                 chvol=1;
 261                 break;
 262         case V4L2_CID_AUDIO_BALANCE:
 263                 left = (t->lvol+84)*606;
 264                 right = (t->rvol+84)*606;
 265
 266                 volume=max(left,right);
 267
 268                 balance = ctrl->value;
 269
 270                 chvol=1;
 271                 break;
 272         case V4L2_CID_AUDIO_BASS:
 273                 t->bass = ((ctrl->value/2400)-12) & 0xff;
 274                 if (t->bass > 15)
 275                         t->bass = 15;
 276                 if (t->bass < -12)
 277                         t->bass = -12 & 0xff;
 278                 break;
 279         case V4L2_CID_AUDIO_TREBLE:
 280                 t->treble = ((ctrl->value/2700)-12) & 0xff;
 281                 if (t->treble > 12)
 282                         t->treble = 12;
 283                 if (t->treble < -12)
 284                         t->treble = -12 & 0xff;
 285                 break;
 286         default:
 287                 return -EINVAL;
 288         }
 289
 290         if (chvol) {
 291                 left = (min(65536 - balance,32768) *
 292                         volume) / 32768;
 293                 right = (min(balance,32768) *
 294                                 volume) / 32768;
 295                 t->lvol = ((left/606)-84) & 0xff;
 296                 if (t->lvol > 24)
 297                         t->lvol = 24;
 298                 if (t->lvol < -84)
 299                         t->lvol = -84 & 0xff;
 300
 301                 t->rvol = ((right/606)-84) & 0xff;
 302                 if (t->rvol > 24)
 303                         t->rvol = 24;
 304                 if (t->rvol < -84)
 305                         t->rvol = -84 & 0xff;
 306         }
 307
 308         tda9875_set(sd);
 309         return 0;
 310 }
 311
 312 static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 313 {
 314         switch (qc->id) {
 315         case V4L2_CID_AUDIO_VOLUME:
 316         case V4L2_CID_AUDIO_BASS:
 317         case V4L2_CID_AUDIO_TREBLE:
 318                 return v4l2_ctrl_query_fill_std(qc);
 319         }
 320         return -EINVAL;
 321 }
 322
 323 static int tda9875_command(struct i2c_client *client, unsigned cmd, void *arg)
 324 {
 325         return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
 326 }
 327
 328 /* ----------------------------------------------------------------------- */
 329
 330 static const struct v4l2_subdev_core_ops tda9875_core_ops = {
 331         .queryctrl = tda9875_queryctrl,
 332         .g_ctrl = tda9875_g_ctrl,
 333         .s_ctrl = tda9875_s_ctrl,
 334 };
 335
 336 static const struct v4l2_subdev_ops tda9875_ops = {
 337         .core = &tda9875_core_ops,
 338 };
 339
 340 /* ----------------------------------------------------------------------- */
 341
 342
 343 /* *********************** *
 344  * i2c interface functions *
 345  * *********************** */
 346
 347 static int tda9875_checkit(struct i2c_client *client, int addr)
 348 {
 349         int dic, rev;
 350
 351         dic = i2c_read_register(client, addr, 254);
 352         rev = i2c_read_register(client, addr, 255);
 353
 354         if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
 355                 v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\n",
 356                         dic == 0 ? "" : "A", rev, addr << 1);
 357                 return 1;
 358         }
 359         v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n",
 360                         addr << 1, dic, rev);
 361         return 0;
 362 }
 363
 364 static int tda9875_probe(struct i2c_client *client,
 365                         const struct i2c_device_id *id)
 366 {
 367         struct tda9875 *t;
 368         struct v4l2_subdev *sd;
 369
 370         v4l_info(client, "chip found @ 0x%02x (%s)\n",
 371                         client->addr << 1, client->adapter->name);
 372
 373         if (!tda9875_checkit(client, client->addr))
 374                 return -ENODEV;
 375
 376         t = kzalloc(sizeof(*t), GFP_KERNEL);
 377         if (!t)
 378                 return -ENOMEM;
 379         sd = &t->sd;
 380         v4l2_i2c_subdev_init(sd, client, &tda9875_ops);
 381
 382         do_tda9875_init(sd);
 383         return 0;
 384 }
 385
 386 static int tda9875_remove(struct i2c_client *client)
 387 {
 388         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 389
 390         do_tda9875_init(sd);
 391         v4l2_device_unregister_subdev(sd);
 392         kfree(to_state(sd));
 393         return 0;
 394 }
 395
 396 static const struct i2c_device_id tda9875_id[] = {
 397         { "tda9875", 0 },
 398         { }
 399 };
 400 MODULE_DEVICE_TABLE(i2c, tda9875_id);
 401
 402 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 403         .name = "tda9875",
 404         .driverid = I2C_DRIVERID_TDA9875,
 405         .command = tda9875_command,
 406         .probe = tda9875_probe,
 407         .remove = tda9875_remove,
 408         .id_table = tda9875_id,
 409 };