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 <linux/i2c.h>
  30 #include <linux/i2c-algo-bit.h>
  31 #include <linux/init.h>
  32
  33
  34 #include <media/i2c-addr.h>
  35
  36 static int debug; /* insmod parameter */
  37 module_param(debug, int, S_IRUGO | S_IWUSR);
  38 MODULE_LICENSE("GPL");
  39
  40 /* Addresses to scan */
  41 static unsigned short normal_i2c[] =  {
  42     I2C_ADDR_TDA9875 >> 1,
  43     I2C_CLIENT_END
  44 };
  45 I2C_CLIENT_INSMOD;
  46
  47 /* This is a superset of the TDA9875 */
  48 struct tda9875 {
  49         int rvol, lvol;
  50         int bass, treble;
  51         struct i2c_client c;
  52 };
  53
  54 static struct i2c_driver driver;
  55 static struct i2c_client client_template;
  56
  57 #define dprintk  if (debug) printk
  58
  59 /* The TDA9875 is made by Philips Semiconductor
  60  * http://www.semiconductors.philips.com
  61  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  62  *
  63  */
  64
  65                 /* subaddresses for TDA9875 */
  66 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  67 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  68 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  69 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  70
  71 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  72 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  73 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  74 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  75
  76 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  77 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  78 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  79 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  80 #define TDA9875_MVR         0x1b  /* Main volume droite */
  81 #define TDA9875_MBA         0x1d  /* Main Basse */
  82 #define TDA9875_MTR         0x1e  /* Main treble */
  83 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  84 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  85 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  86 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  87 #define TDA9875_ATR         0x23  /* Auxilary treble */
  88
  89 #define TDA9875_MSR         0x02  /* Monitor select register */
  90 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  91 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  92 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  93 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  94 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  95 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
  96 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
  97 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
  98 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
  99
 100 /* values */
 101 #define TDA9875_MUTE_ON     0xff /* general mute */
 102 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
 103
 104
 105
 106 /* Begin code */
 107
 108 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
 109 {
 110         unsigned char buffer[2];
 111         dprintk("In tda9875_write\n");
 112         dprintk("Writing %d 0x%x\n", subaddr, val);
 113         buffer[0] = subaddr;
 114         buffer[1] = val;
 115         if (2 != i2c_master_send(client,buffer,2)) {
 116                 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 117                        subaddr, val);
 118                 return -1;
 119         }
 120         return 0;
 121 }
 122
 123
 124 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 125 {
 126         unsigned char write[1];
 127         unsigned char read[1];
 128         struct i2c_msg msgs[2] = {
 129                 { addr, 0,        1, write },
 130                 { addr, I2C_M_RD, 1, read  }
 131         };
 132         write[0] = reg;
 133
 134         if (2 != i2c_transfer(adap,msgs,2)) {
 135                 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 136                 return -1;
 137         }
 138         dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 139         return read[0];
 140 }
 141
 142 static void tda9875_set(struct i2c_client *client)
 143 {
 144         struct tda9875 *tda = i2c_get_clientdata(client);
 145         unsigned char a;
 146
 147         dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 148                 tda->lvol,tda->rvol,tda->bass,tda->treble);
 149
 150
 151         a = tda->lvol & 0xff;
 152         tda9875_write(client, TDA9875_MVL, a);
 153         a =tda->rvol & 0xff;
 154         tda9875_write(client, TDA9875_MVR, a);
 155         a =tda->bass & 0xff;
 156         tda9875_write(client, TDA9875_MBA, a);
 157         a =tda->treble  & 0xff;
 158         tda9875_write(client, TDA9875_MTR, a);
 159 }
 160
 161 static void do_tda9875_init(struct i2c_client *client)
 162 {
 163         struct tda9875 *t = i2c_get_clientdata(client);
 164         dprintk("In tda9875_init\n");
 165         tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
 166         tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 167         tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 168         tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 169         tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 170         tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 171         tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 172         tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 173         tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 174         tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 175         tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 176         tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 177         tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
 178
 179         tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 180         tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 181         tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 182         tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 183         tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 184         tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 185         tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 186         tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 187         tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 188         tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 189         tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 190         tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 191         tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 192         tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 193         tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 194         tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
 195
 196         tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
 197
 198         t->lvol=t->rvol =0;     /* 0dB */
 199         t->bass=0;                      /* 0dB */
 200         t->treble=0;            /* 0dB */
 201         tda9875_set(client);
 202
 203 }
 204
 205
 206 /* *********************** *
 207  * i2c interface functions *
 208  * *********************** */
 209
 210 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 211 {
 212         int dic,rev;
 213
 214         dic=i2c_read_register(adap,addr,254);
 215         rev=i2c_read_register(adap,addr,255);
 216
 217         if(dic==0 || dic==2) { // tda9875 and tda9875A
 218                 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 219                 dic==0?"":"A", rev,addr<<1);
 220                 return 1;
 221         }
 222         printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 223         return(0);
 224 }
 225
 226 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
 227 {
 228         struct tda9875 *t;
 229         struct i2c_client *client;
 230         dprintk("In tda9875_attach\n");
 231
 232         t = kzalloc(sizeof *t,GFP_KERNEL);
 233         if (!t)
 234                 return -ENOMEM;
 235
 236         client = &t->c;
 237         memcpy(client,&client_template,sizeof(struct i2c_client));
 238         client->adapter = adap;
 239         client->addr = addr;
 240         i2c_set_clientdata(client, t);
 241
 242         if(!tda9875_checkit(adap,addr)) {
 243                 kfree(t);
 244                 return 1;
 245         }
 246
 247         do_tda9875_init(client);
 248         printk(KERN_INFO "tda9875: init\n");
 249
 250         i2c_attach_client(client);
 251         return 0;
 252 }
 253
 254 static int tda9875_probe(struct i2c_adapter *adap)
 255 {
 256         if (adap->class & I2C_CLASS_TV_ANALOG)
 257                 return i2c_probe(adap, &addr_data, tda9875_attach);
 258         return 0;
 259 }
 260
 261 static int tda9875_detach(struct i2c_client *client)
 262 {
 263         struct tda9875 *t  = i2c_get_clientdata(client);
 264
 265         do_tda9875_init(client);
 266         i2c_detach_client(client);
 267
 268         kfree(t);
 269         return 0;
 270 }
 271
 272 static int tda9875_command(struct i2c_client *client,
 273                                 unsigned int cmd, void *arg)
 274 {
 275         struct tda9875 *t = i2c_get_clientdata(client);
 276
 277         dprintk("In tda9875_command...\n");
 278
 279         switch (cmd) {
 280         /* --- v4l ioctls --- */
 281         /* take care: bttv does userspace copying, we'll get a
 282            kernel pointer here... */
 283         case VIDIOCGAUDIO:
 284         {
 285                 struct video_audio *va = arg;
 286                 int left,right;
 287
 288                 dprintk("VIDIOCGAUDIO\n");
 289
 290                 va->flags |= VIDEO_AUDIO_VOLUME |
 291                         VIDEO_AUDIO_BASS |
 292                         VIDEO_AUDIO_TREBLE;
 293
 294                 /* min is -84 max is 24 */
 295                 left = (t->lvol+84)*606;
 296                 right = (t->rvol+84)*606;
 297                 va->volume=max(left,right);
 298                 va->balance=(32768*min(left,right))/
 299                         (va->volume ? va->volume : 1);
 300                 va->balance=(left<right)?
 301                         (65535-va->balance) : va->balance;
 302                 va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 303                 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 304                 va->mode |= VIDEO_SOUND_MONO;
 305
 306                 break; /* VIDIOCGAUDIO case */
 307         }
 308
 309         case VIDIOCSAUDIO:
 310         {
 311                 struct video_audio *va = arg;
 312                 int left,right;
 313
 314                 dprintk("VIDEOCSAUDIO...\n");
 315                 left = (min(65536 - va->balance,32768) *
 316                         va->volume) / 32768;
 317                 right = (min(va->balance,(__u16)32768) *
 318                          va->volume) / 32768;
 319                 t->lvol = ((left/606)-84) & 0xff;
 320                 if (t->lvol > 24)
 321                  t->lvol = 24;
 322                 if (t->lvol < -84)
 323                  t->lvol = -84 & 0xff;
 324
 325                 t->rvol = ((right/606)-84) & 0xff;
 326                 if (t->rvol > 24)
 327                  t->rvol = 24;
 328                 if (t->rvol < -84)
 329                  t->rvol = -84 & 0xff;
 330
 331                 t->bass = ((va->bass/2400)-12) & 0xff;
 332                 if (t->bass > 15)
 333                  t->bass = 15;
 334                 if (t->bass < -12)
 335                  t->bass = -12 & 0xff;
 336
 337                 t->treble = ((va->treble/2700)-12) & 0xff;
 338                 if (t->treble > 12)
 339                  t->treble = 12;
 340                 if (t->treble < -12)
 341                  t->treble = -12 & 0xff;
 342
 343
 344
 345 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
 346
 347
 348                 tda9875_set(client);
 349
 350                 break;
 351
 352         } /* end of VIDEOCSAUDIO case */
 353
 354         default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
 355
 356                 /* nothing */
 357                 dprintk("Default\n");
 358
 359         } /* end of (cmd) switch */
 360
 361         return 0;
 362 }
 363
 364
 365 static struct i2c_driver driver = {
 366         .driver = {
 367                 .name   = "tda9875",
 368         },
 369         .id             = I2C_DRIVERID_TDA9875,
 370         .attach_adapter = tda9875_probe,
 371         .detach_client  = tda9875_detach,
 372         .command        = tda9875_command,
 373 };
 374
 375 static struct i2c_client client_template =
 376 {
 377         .name      = "tda9875",
 378         .driver    = &driver,
 379 };
 380
 381 static int __init tda9875_init(void)
 382 {
 383         return i2c_add_driver(&driver);
 384 }
 385
 386 static void __exit tda9875_fini(void)
 387 {
 388         i2c_del_driver(&driver);
 389 }
 390
 391 module_init(tda9875_init);
 392 module_exit(tda9875_fini);
 393
 394 /*
 395  * Local variables:
 396  * c-basic-offset: 8
 397  * End:
 398  */
 399