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  * This code is placed under the terms of the GNU General Public License
  11  * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
  12  * Which was based on tda8425.c by Greg Alexander (c) 1998
  13  *
  14  * OPTIONS:
  15  * debug   - set to 1 if you'd like to see debug messages
  16  *
  17  *  Revision: 0.1 - original version
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/timer.h>
  24 #include <linux/delay.h>
  25 #include <linux/errno.h>
  26 #include <linux/slab.h>
  27 #include <linux/videodev.h>
  28 #include <media/v4l2-common.h>
  29 #include <linux/i2c.h>
  30 #include <linux/init.h>
  31
  32
  33 #include <media/i2c-addr.h>
  34
  35 static int debug; /* insmod parameter */
  36 module_param(debug, int, S_IRUGO | S_IWUSR);
  37 MODULE_LICENSE("GPL");
  38
  39 /* Addresses to scan */
  40 static unsigned short normal_i2c[] =  {
  41     I2C_ADDR_TDA9875 >> 1,
  42     I2C_CLIENT_END
  43 };
  44 I2C_CLIENT_INSMOD;
  45
  46 /* This is a superset of the TDA9875 */
  47 struct tda9875 {
  48         int rvol, lvol;
  49         int bass, treble;
  50         struct i2c_client c;
  51 };
  52
  53 static struct i2c_driver driver;
  54 static struct i2c_client client_template;
  55
  56 #define dprintk  if (debug) printk
  57
  58 /* The TDA9875 is made by Philips Semiconductor
  59  * http://www.semiconductors.philips.com
  60  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  61  *
  62  */
  63
  64                 /* subaddresses for TDA9875 */
  65 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  66 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  67 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  68 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  69
  70 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  71 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  72 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  73 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  74
  75 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  76 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  77 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  78 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  79 #define TDA9875_MVR         0x1b  /* Main volume droite */
  80 #define TDA9875_MBA         0x1d  /* Main Basse */
  81 #define TDA9875_MTR         0x1e  /* Main treble */
  82 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  83 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  84 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  85 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  86 #define TDA9875_ATR         0x23  /* Auxilary treble */
  87
  88 #define TDA9875_MSR         0x02  /* Monitor select register */
  89 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  90 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  91 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  92 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  93 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  94 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
  95 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
  96 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
  97 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
  98
  99 /* values */
 100 #define TDA9875_MUTE_ON     0xff /* general mute */
 101 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
 102
 103
 104
 105 /* Begin code */
 106
 107 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
 108 {
 109         unsigned char buffer[2];
 110         dprintk("In tda9875_write\n");
 111         dprintk("Writing %d 0x%x\n", subaddr, val);
 112         buffer[0] = subaddr;
 113         buffer[1] = val;
 114         if (2 != i2c_master_send(client,buffer,2)) {
 115                 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 116                        subaddr, val);
 117                 return -1;
 118         }
 119         return 0;
 120 }
 121
 122
 123 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 124 {
 125         unsigned char write[1];
 126         unsigned char read[1];
 127         struct i2c_msg msgs[2] = {
 128                 { addr, 0,        1, write },
 129                 { addr, I2C_M_RD, 1, read  }
 130         };
 131         write[0] = reg;
 132
 133         if (2 != i2c_transfer(adap,msgs,2)) {
 134                 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 135                 return -1;
 136         }
 137         dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 138         return read[0];
 139 }
 140
 141 static void tda9875_set(struct i2c_client *client)
 142 {
 143         struct tda9875 *tda = i2c_get_clientdata(client);
 144         unsigned char a;
 145
 146         dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 147                 tda->lvol,tda->rvol,tda->bass,tda->treble);
 148
 149
 150         a = tda->lvol & 0xff;
 151         tda9875_write(client, TDA9875_MVL, a);
 152         a =tda->rvol & 0xff;
 153         tda9875_write(client, TDA9875_MVR, a);
 154         a =tda->bass & 0xff;
 155         tda9875_write(client, TDA9875_MBA, a);
 156         a =tda->treble  & 0xff;
 157         tda9875_write(client, TDA9875_MTR, a);
 158 }
 159
 160 static void do_tda9875_init(struct i2c_client *client)
 161 {
 162         struct tda9875 *t = i2c_get_clientdata(client);
 163         dprintk("In tda9875_init\n");
 164         tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
 165         tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 166         tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 167         tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 168         tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 169         tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 170         tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 171         tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 172         tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 173         tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 174         tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 175         tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 176         tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
 177
 178         tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 179         tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 180         tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 181         tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 182         tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 183         tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 184         tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 185         tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 186         tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 187         tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 188         tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 189         tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 190         tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 191         tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 192         tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 193         tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
 194
 195         tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
 196
 197         t->lvol=t->rvol =0;     /* 0dB */
 198         t->bass=0;                      /* 0dB */
 199         t->treble=0;            /* 0dB */
 200         tda9875_set(client);
 201
 202 }
 203
 204
 205 /* *********************** *
 206  * i2c interface functions *
 207  * *********************** */
 208
 209 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 210 {
 211         int dic,rev;
 212
 213         dic=i2c_read_register(adap,addr,254);
 214         rev=i2c_read_register(adap,addr,255);
 215
 216         if(dic==0 || dic==2) { // tda9875 and tda9875A
 217                 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 218                 dic==0?"":"A", rev,addr<<1);
 219                 return 1;
 220         }
 221         printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 222         return(0);
 223 }
 224
 225 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
 226 {
 227         struct tda9875 *t;
 228         struct i2c_client *client;
 229         dprintk("In tda9875_attach\n");
 230
 231         t = kzalloc(sizeof *t,GFP_KERNEL);
 232         if (!t)
 233                 return -ENOMEM;
 234
 235         client = &t->c;
 236         memcpy(client,&client_template,sizeof(struct i2c_client));
 237         client->adapter = adap;
 238         client->addr = addr;
 239         i2c_set_clientdata(client, t);
 240
 241         if(!tda9875_checkit(adap,addr)) {
 242                 kfree(t);
 243                 return 1;
 244         }
 245
 246         do_tda9875_init(client);
 247         printk(KERN_INFO "tda9875: init\n");
 248
 249         i2c_attach_client(client);
 250         return 0;
 251 }
 252
 253 static int tda9875_probe(struct i2c_adapter *adap)
 254 {
 255         if (adap->class & I2C_CLASS_TV_ANALOG)
 256                 return i2c_probe(adap, &addr_data, tda9875_attach);
 257         return 0;
 258 }
 259
 260 static int tda9875_detach(struct i2c_client *client)
 261 {
 262         struct tda9875 *t  = i2c_get_clientdata(client);
 263
 264         do_tda9875_init(client);
 265         i2c_detach_client(client);
 266
 267         kfree(t);
 268         return 0;
 269 }
 270
 271 static int tda9875_command(struct i2c_client *client,
 272                                 unsigned int cmd, void *arg)
 273 {
 274         struct tda9875 *t = i2c_get_clientdata(client);
 275
 276         dprintk("In tda9875_command...\n");
 277
 278         switch (cmd) {
 279         /* --- v4l ioctls --- */
 280         /* take care: bttv does userspace copying, we'll get a
 281            kernel pointer here... */
 282         case VIDIOCGAUDIO:
 283         {
 284                 struct video_audio *va = arg;
 285                 int left,right;
 286
 287                 dprintk("VIDIOCGAUDIO\n");
 288
 289                 va->flags |= VIDEO_AUDIO_VOLUME |
 290                         VIDEO_AUDIO_BASS |
 291                         VIDEO_AUDIO_TREBLE;
 292
 293                 /* min is -84 max is 24 */
 294                 left = (t->lvol+84)*606;
 295                 right = (t->rvol+84)*606;
 296                 va->volume=max(left,right);
 297                 va->balance=(32768*min(left,right))/
 298                         (va->volume ? va->volume : 1);
 299                 va->balance=(left<right)?
 300                         (65535-va->balance) : va->balance;
 301                 va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 302                 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 303                 va->mode |= VIDEO_SOUND_MONO;
 304
 305                 break; /* VIDIOCGAUDIO case */
 306         }
 307
 308         case VIDIOCSAUDIO:
 309         {
 310                 struct video_audio *va = arg;
 311                 int left,right;
 312
 313                 dprintk("VIDEOCSAUDIO...\n");
 314                 left = (min(65536 - va->balance,32768) *
 315                         va->volume) / 32768;
 316                 right = (min(va->balance,(__u16)32768) *
 317                          va->volume) / 32768;
 318                 t->lvol = ((left/606)-84) & 0xff;
 319                 if (t->lvol > 24)
 320                  t->lvol = 24;
 321                 if (t->lvol < -84)
 322                  t->lvol = -84 & 0xff;
 323
 324                 t->rvol = ((right/606)-84) & 0xff;
 325                 if (t->rvol > 24)
 326                  t->rvol = 24;
 327                 if (t->rvol < -84)
 328                  t->rvol = -84 & 0xff;
 329
 330                 t->bass = ((va->bass/2400)-12) & 0xff;
 331                 if (t->bass > 15)
 332                  t->bass = 15;
 333                 if (t->bass < -12)
 334                  t->bass = -12 & 0xff;
 335
 336                 t->treble = ((va->treble/2700)-12) & 0xff;
 337                 if (t->treble > 12)
 338                  t->treble = 12;
 339                 if (t->treble < -12)
 340                  t->treble = -12 & 0xff;
 341
 342
 343
 344 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
 345
 346
 347                 tda9875_set(client);
 348
 349                 break;
 350
 351         } /* end of VIDEOCSAUDIO case */
 352
 353         default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
 354
 355                 /* nothing */
 356                 dprintk("Default\n");
 357
 358         } /* end of (cmd) switch */
 359
 360         return 0;
 361 }
 362
 363
 364 static struct i2c_driver driver = {
 365         .driver = {
 366                 .name   = "tda9875",
 367         },
 368         .id             = I2C_DRIVERID_TDA9875,
 369         .attach_adapter = tda9875_probe,
 370         .detach_client  = tda9875_detach,
 371         .command        = tda9875_command,
 372 };
 373
 374 static struct i2c_client client_template =
 375 {
 376         .name      = "tda9875",
 377         .driver    = &driver,
 378 };
 379
 380 static int __init tda9875_init(void)
 381 {
 382         return i2c_add_driver(&driver);
 383 }
 384
 385 static void __exit tda9875_fini(void)
 386 {
 387         i2c_del_driver(&driver);
 388 }
 389
 390 module_init(tda9875_init);
 391 module_exit(tda9875_fini);
 392
 393 /*
 394  * Local variables:
 395  * c-basic-offset: 8
 396  * End:
 397  */
 398