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/sched.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/videodev.h>
  29 #include <media/v4l2-common.h>
  30 #include <linux/i2c.h>
  31 #include <linux/i2c-algo-bit.h>
  32 #include <linux/init.h>
  33
  34
  35 #include <media/i2c-addr.h>
  36
  37 static int debug; /* insmod parameter */
  38 module_param(debug, int, S_IRUGO | S_IWUSR);
  39 MODULE_LICENSE("GPL");
  40
  41 /* Addresses to scan */
  42 static unsigned short normal_i2c[] =  {
  43     I2C_ADDR_TDA9875 >> 1,
  44     I2C_CLIENT_END
  45 };
  46 I2C_CLIENT_INSMOD;
  47
  48 /* This is a superset of the TDA9875 */
  49 struct tda9875 {
  50         int rvol, lvol;
  51         int bass, treble;
  52         struct i2c_client c;
  53 };
  54
  55 static struct i2c_driver driver;
  56 static struct i2c_client client_template;
  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 i2c_client *client, int subaddr, unsigned char val)
 110 {
 111         unsigned char buffer[2];
 112         dprintk("In tda9875_write\n");
 113         dprintk("Writing %d 0x%x\n", subaddr, val);
 114         buffer[0] = subaddr;
 115         buffer[1] = val;
 116         if (2 != i2c_master_send(client,buffer,2)) {
 117                 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 118                        subaddr, val);
 119                 return -1;
 120         }
 121         return 0;
 122 }
 123
 124
 125 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 126 {
 127         unsigned char write[1];
 128         unsigned char read[1];
 129         struct i2c_msg msgs[2] = {
 130                 { addr, 0,        1, write },
 131                 { addr, I2C_M_RD, 1, read  }
 132         };
 133         write[0] = reg;
 134
 135         if (2 != i2c_transfer(adap,msgs,2)) {
 136                 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 137                 return -1;
 138         }
 139         dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 140         return read[0];
 141 }
 142
 143 static void tda9875_set(struct i2c_client *client)
 144 {
 145         struct tda9875 *tda = i2c_get_clientdata(client);
 146         unsigned char a;
 147
 148         dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 149                 tda->lvol,tda->rvol,tda->bass,tda->treble);
 150
 151
 152         a = tda->lvol & 0xff;
 153         tda9875_write(client, TDA9875_MVL, a);
 154         a =tda->rvol & 0xff;
 155         tda9875_write(client, TDA9875_MVR, a);
 156         a =tda->bass & 0xff;
 157         tda9875_write(client, TDA9875_MBA, a);
 158         a =tda->treble  & 0xff;
 159         tda9875_write(client, TDA9875_MTR, a);
 160 }
 161
 162 static void do_tda9875_init(struct i2c_client *client)
 163 {
 164         struct tda9875 *t = i2c_get_clientdata(client);
 165         dprintk("In tda9875_init\n");
 166         tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
 167         tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 168         tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 169         tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 170         tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 171         tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 172         tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 173         tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 174         tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 175         tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 176         tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 177         tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 178         tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
 179
 180         tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 181         tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 182         tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 183         tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 184         tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 185         tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 186         tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 187         tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 188         tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 189         tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 190         tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 191         tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 192         tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 193         tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 194         tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 195         tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
 196
 197         tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
 198
 199         t->lvol=t->rvol =0;     /* 0dB */
 200         t->bass=0;                      /* 0dB */
 201         t->treble=0;            /* 0dB */
 202         tda9875_set(client);
 203
 204 }
 205
 206
 207 /* *********************** *
 208  * i2c interface functions *
 209  * *********************** */
 210
 211 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 212 {
 213         int dic,rev;
 214
 215         dic=i2c_read_register(adap,addr,254);
 216         rev=i2c_read_register(adap,addr,255);
 217
 218         if(dic==0 || dic==2) { // tda9875 and tda9875A
 219                 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 220                 dic==0?"":"A", rev,addr<<1);
 221                 return 1;
 222         }
 223         printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 224         return(0);
 225 }
 226
 227 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
 228 {
 229         struct tda9875 *t;
 230         struct i2c_client *client;
 231         dprintk("In tda9875_attach\n");
 232
 233         t = kzalloc(sizeof *t,GFP_KERNEL);
 234         if (!t)
 235                 return -ENOMEM;
 236
 237         client = &t->c;
 238         memcpy(client,&client_template,sizeof(struct i2c_client));
 239         client->adapter = adap;
 240         client->addr = addr;
 241         i2c_set_clientdata(client, t);
 242
 243         if(!tda9875_checkit(adap,addr)) {
 244                 kfree(t);
 245                 return 1;
 246         }
 247
 248         do_tda9875_init(client);
 249         printk(KERN_INFO "tda9875: init\n");
 250
 251         i2c_attach_client(client);
 252         return 0;
 253 }
 254
 255 static int tda9875_probe(struct i2c_adapter *adap)
 256 {
 257         if (adap->class & I2C_CLASS_TV_ANALOG)
 258                 return i2c_probe(adap, &addr_data, tda9875_attach);
 259         return 0;
 260 }
 261
 262 static int tda9875_detach(struct i2c_client *client)
 263 {
 264         struct tda9875 *t  = i2c_get_clientdata(client);
 265
 266         do_tda9875_init(client);
 267         i2c_detach_client(client);
 268
 269         kfree(t);
 270         return 0;
 271 }
 272
 273 static int tda9875_command(struct i2c_client *client,
 274                                 unsigned int cmd, void *arg)
 275 {
 276         struct tda9875 *t = i2c_get_clientdata(client);
 277
 278         dprintk("In tda9875_command...\n");
 279
 280         switch (cmd) {
 281         /* --- v4l ioctls --- */
 282         /* take care: bttv does userspace copying, we'll get a
 283            kernel pointer here... */
 284         case VIDIOCGAUDIO:
 285         {
 286                 struct video_audio *va = arg;
 287                 int left,right;
 288
 289                 dprintk("VIDIOCGAUDIO\n");
 290
 291                 va->flags |= VIDEO_AUDIO_VOLUME |
 292                         VIDEO_AUDIO_BASS |
 293                         VIDEO_AUDIO_TREBLE;
 294
 295                 /* min is -84 max is 24 */
 296                 left = (t->lvol+84)*606;
 297                 right = (t->rvol+84)*606;
 298                 va->volume=max(left,right);
 299                 va->balance=(32768*min(left,right))/
 300                         (va->volume ? va->volume : 1);
 301                 va->balance=(left<right)?
 302                         (65535-va->balance) : va->balance;
 303                 va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 304                 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 305                 va->mode |= VIDEO_SOUND_MONO;
 306
 307                 break; /* VIDIOCGAUDIO case */
 308         }
 309
 310         case VIDIOCSAUDIO:
 311         {
 312                 struct video_audio *va = arg;
 313                 int left,right;
 314
 315                 dprintk("VIDEOCSAUDIO...\n");
 316                 left = (min(65536 - va->balance,32768) *
 317                         va->volume) / 32768;
 318                 right = (min(va->balance,(__u16)32768) *
 319                          va->volume) / 32768;
 320                 t->lvol = ((left/606)-84) & 0xff;
 321                 if (t->lvol > 24)
 322                  t->lvol = 24;
 323                 if (t->lvol < -84)
 324                  t->lvol = -84 & 0xff;
 325
 326                 t->rvol = ((right/606)-84) & 0xff;
 327                 if (t->rvol > 24)
 328                  t->rvol = 24;
 329                 if (t->rvol < -84)
 330                  t->rvol = -84 & 0xff;
 331
 332                 t->bass = ((va->bass/2400)-12) & 0xff;
 333                 if (t->bass > 15)
 334                  t->bass = 15;
 335                 if (t->bass < -12)
 336                  t->bass = -12 & 0xff;
 337
 338                 t->treble = ((va->treble/2700)-12) & 0xff;
 339                 if (t->treble > 12)
 340                  t->treble = 12;
 341                 if (t->treble < -12)
 342                  t->treble = -12 & 0xff;
 343
 344
 345
 346 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
 347
 348
 349                 tda9875_set(client);
 350
 351                 break;
 352
 353         } /* end of VIDEOCSAUDIO case */
 354
 355         default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
 356
 357                 /* nothing */
 358                 dprintk("Default\n");
 359
 360         } /* end of (cmd) switch */
 361
 362         return 0;
 363 }
 364
 365
 366 static struct i2c_driver driver = {
 367         .driver = {
 368                 .name   = "tda9875",
 369         },
 370         .id             = I2C_DRIVERID_TDA9875,
 371         .attach_adapter = tda9875_probe,
 372         .detach_client  = tda9875_detach,
 373         .command        = tda9875_command,
 374 };
 375
 376 static struct i2c_client client_template =
 377 {
 378         .name      = "tda9875",
 379         .driver    = &driver,
 380 };
 381
 382 static int __init tda9875_init(void)
 383 {
 384         return i2c_add_driver(&driver);
 385 }
 386
 387 static void __exit tda9875_fini(void)
 388 {
 389         i2c_del_driver(&driver);
 390 }
 391
 392 module_init(tda9875_init);
 393 module_exit(tda9875_fini);
 394
 395 /*
 396  * Local variables:
 397  * c-basic-offset: 8
 398  * End:
 399  */
 400