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 #include "bttv.h"
  34 #include <media/audiochip.h>
  35 #include <media/id.h>
  36
  37 static int debug; /* insmod parameter */
  38 module_param(debug, int, S_IRUGO | S_IWUSR);
  39 MODULE_LICENSE("GPL");
  40
  41
  42 /* Addresses to scan */
  43 static unsigned short normal_i2c[] =  {
  44     I2C_TDA9875 >> 1,
  45     I2C_CLIENT_END
  46 };
  47 I2C_CLIENT_INSMOD;
  48
  49 /* This is a superset of the TDA9875 */
  50 struct tda9875 {
  51         int mode;
  52         int rvol, lvol;
  53         int bass, treble;
  54         struct i2c_client c;
  55 };
  56
  57 static struct i2c_driver driver;
  58 static struct i2c_client client_template;
  59
  60 #define dprintk  if (debug) printk
  61
  62 /* The TDA9875 is made by Philips Semiconductor
  63  * http://www.semiconductors.philips.com
  64  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  65  *
  66  */
  67
  68                 /* subaddresses for TDA9875 */
  69 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  70 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  71 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  72 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  73
  74 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  75 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  76 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  77 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  78
  79 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  80 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  81 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  82 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  83 #define TDA9875_MVR         0x1b  /* Main volume droite */
  84 #define TDA9875_MBA         0x1d  /* Main Basse */
  85 #define TDA9875_MTR         0x1e  /* Main treble */
  86 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  87 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  88 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  89 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  90 #define TDA9875_ATR         0x23  /* Auxilary treble */
  91
  92 #define TDA9875_MSR         0x02  /* Monitor select register */
  93 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  94 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  95 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  96 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  97 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  98 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
  99 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
 100 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
 101 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
 102
 103 /* values */
 104 #define TDA9875_MUTE_ON     0xff /* general mute */
 105 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
 106
 107
 108
 109 /* Begin code */
 110
 111 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
 112 {
 113         unsigned char buffer[2];
 114         dprintk("In tda9875_write\n");
 115         dprintk("Writing %d 0x%x\n", subaddr, val);
 116         buffer[0] = subaddr;
 117         buffer[1] = val;
 118         if (2 != i2c_master_send(client,buffer,2)) {
 119                 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 120                        subaddr, val);
 121                 return -1;
 122         }
 123         return 0;
 124 }
 125
 126
 127 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 128 {
 129         unsigned char write[1];
 130         unsigned char read[1];
 131         struct i2c_msg msgs[2] = {
 132                 { addr, 0,        1, write },
 133                 { addr, I2C_M_RD, 1, read  }
 134         };
 135         write[0] = reg;
 136
 137         if (2 != i2c_transfer(adap,msgs,2)) {
 138                 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 139                 return -1;
 140         }
 141         dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 142         return read[0];
 143 }
 144
 145 static void tda9875_set(struct i2c_client *client)
 146 {
 147         struct tda9875 *tda = i2c_get_clientdata(client);
 148         unsigned char a;
 149
 150         dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 151                 tda->lvol,tda->rvol,tda->bass,tda->treble);
 152
 153
 154         a = tda->lvol & 0xff;
 155         tda9875_write(client, TDA9875_MVL, a);
 156         a =tda->rvol & 0xff;
 157         tda9875_write(client, TDA9875_MVR, a);
 158         a =tda->bass & 0xff;
 159         tda9875_write(client, TDA9875_MBA, a);
 160         a =tda->treble  & 0xff;
 161         tda9875_write(client, TDA9875_MTR, a);
 162 }
 163
 164 static void do_tda9875_init(struct i2c_client *client)
 165 {
 166         struct tda9875 *t = i2c_get_clientdata(client);
 167         dprintk("In tda9875_init\n");
 168         tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
 169         tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 170         tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 171         tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 172         tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 173         tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 174         tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 175         tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 176         tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 177         tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 178         tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 179         tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 180         tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
 181
 182         tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 183         tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 184         tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 185         tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 186         tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 187         tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 188         tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 189         tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 190         tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 191         tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 192         tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 193         tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 194         tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 195         tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 196         tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 197         tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
 198
 199         tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
 200
 201         t->mode=AUDIO_UNMUTE;
 202         t->lvol=t->rvol =0;     /* 0dB */
 203         t->bass=0;                      /* 0dB */
 204         t->treble=0;            /* 0dB */
 205         tda9875_set(client);
 206
 207 }
 208
 209
 210 /* *********************** *
 211  * i2c interface functions *
 212  * *********************** */
 213
 214 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 215 {
 216         int dic,rev;
 217
 218         dic=i2c_read_register(adap,addr,254);
 219         rev=i2c_read_register(adap,addr,255);
 220
 221         if(dic==0 || dic==2) { // tda9875 and tda9875A
 222                 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 223                 dic==0?"":"A", rev,addr<<1);
 224                 return 1;
 225         }
 226         printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 227         return(0);
 228 }
 229
 230 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
 231 {
 232         struct tda9875 *t;
 233         struct i2c_client *client;
 234         dprintk("In tda9875_attach\n");
 235
 236         t = kmalloc(sizeof *t,GFP_KERNEL);
 237         if (!t)
 238                 return -ENOMEM;
 239         memset(t,0,sizeof *t);
 240
 241         client = &t->c;
 242         memcpy(client,&client_template,sizeof(struct i2c_client));
 243         client->adapter = adap;
 244         client->addr = addr;
 245         i2c_set_clientdata(client, t);
 246
 247         if(!tda9875_checkit(adap,addr)) {
 248                 kfree(t);
 249                 return 1;
 250         }
 251
 252         do_tda9875_init(client);
 253         printk(KERN_INFO "tda9875: init\n");
 254
 255         i2c_attach_client(client);
 256         return 0;
 257 }
 258
 259 static int tda9875_probe(struct i2c_adapter *adap)
 260 {
 261 #ifdef I2C_CLASS_TV_ANALOG
 262         if (adap->class & I2C_CLASS_TV_ANALOG)
 263                 return i2c_probe(adap, &addr_data, tda9875_attach);
 264 #else
 265         if (adap->id == I2C_HW_B_BT848)
 266                 return i2c_probe(adap, &addr_data, tda9875_attach);
 267 #endif
 268         return 0;
 269 }
 270
 271 static int tda9875_detach(struct i2c_client *client)
 272 {
 273         struct tda9875 *t  = i2c_get_clientdata(client);
 274
 275         do_tda9875_init(client);
 276         i2c_detach_client(client);
 277
 278         kfree(t);
 279         return 0;
 280 }
 281
 282 static int tda9875_command(struct i2c_client *client,
 283                                 unsigned int cmd, void *arg)
 284 {
 285         struct tda9875 *t = i2c_get_clientdata(client);
 286
 287         dprintk("In tda9875_command...\n");
 288
 289         switch (cmd) {
 290         /* --- v4l ioctls --- */
 291         /* take care: bttv does userspace copying, we'll get a
 292            kernel pointer here... */
 293         case VIDIOCGAUDIO:
 294         {
 295                 struct video_audio *va = arg;
 296                 int left,right;
 297
 298                 dprintk("VIDIOCGAUDIO\n");
 299
 300                 va->flags |= VIDEO_AUDIO_VOLUME |
 301                         VIDEO_AUDIO_BASS |
 302                         VIDEO_AUDIO_TREBLE;
 303
 304                 /* min is -84 max is 24 */
 305                 left = (t->lvol+84)*606;
 306                 right = (t->rvol+84)*606;
 307                 va->volume=max(left,right);
 308                 va->balance=(32768*min(left,right))/
 309                         (va->volume ? va->volume : 1);
 310                 va->balance=(left<right)?
 311                         (65535-va->balance) : va->balance;
 312                 va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 313                 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 314                 va->mode |= VIDEO_SOUND_MONO;
 315
 316                 break; /* VIDIOCGAUDIO case */
 317         }
 318
 319         case VIDIOCSAUDIO:
 320         {
 321                 struct video_audio *va = arg;
 322                 int left,right;
 323
 324                 dprintk("VIDEOCSAUDIO...\n");
 325                 left = (min(65536 - va->balance,32768) *
 326                         va->volume) / 32768;
 327                 right = (min(va->balance,(__u16)32768) *
 328                          va->volume) / 32768;
 329                 t->lvol = ((left/606)-84) & 0xff;
 330                 if (t->lvol > 24)
 331                  t->lvol = 24;
 332                 if (t->lvol < -84)
 333                  t->lvol = -84 & 0xff;
 334
 335                 t->rvol = ((right/606)-84) & 0xff;
 336                 if (t->rvol > 24)
 337                  t->rvol = 24;
 338                 if (t->rvol < -84)
 339                  t->rvol = -84 & 0xff;
 340
 341                 t->bass = ((va->bass/2400)-12) & 0xff;
 342                 if (t->bass > 15)
 343                  t->bass = 15;
 344                 if (t->bass < -12)
 345                  t->bass = -12 & 0xff;
 346
 347                 t->treble = ((va->treble/2700)-12) & 0xff;
 348                 if (t->treble > 12)
 349                  t->treble = 12;
 350                 if (t->treble < -12)
 351                  t->treble = -12 & 0xff;
 352
 353
 354
 355 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
 356
 357
 358                 tda9875_set(client);
 359
 360                 break;
 361
 362         } /* end of VIDEOCSAUDIO case */
 363
 364         default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
 365
 366                 /* nothing */
 367                 dprintk("Default\n");
 368
 369         } /* end of (cmd) switch */
 370
 371         return 0;
 372 }
 373
 374
 375 static struct i2c_driver driver = {
 376         .owner          = THIS_MODULE,
 377         .name           = "i2c tda9875 driver",
 378         .id             = I2C_DRIVERID_TDA9875,
 379         .flags          = I2C_DF_NOTIFY,
 380         .attach_adapter = tda9875_probe,
 381         .detach_client  = tda9875_detach,
 382         .command        = tda9875_command,
 383 };
 384
 385 static struct i2c_client client_template =
 386 {
 387         .name      = "tda9875",
 388         .driver    = &driver,
 389 };
 390
 391 static int __init tda9875_init(void)
 392 {
 393         return i2c_add_driver(&driver);
 394 }
 395
 396 static void __exit tda9875_fini(void)
 397 {
 398         i2c_del_driver(&driver);
 399 }
 400
 401 module_init(tda9875_init);
 402 module_exit(tda9875_fini);
 403
 404 /*
 405  * Local variables:
 406  * c-basic-offset: 8
 407  * End:
 408  */
 409