release/src/linux/linux/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 "audiochip.h"
  35 #include "id.h"
  36 #include "i2c-compat.h"
  37
  38 MODULE_PARM(debug,"i");
  39 MODULE_LICENSE("GPL");
  40
  41 static int debug = 0;   /* insmod parameter */
  42
  43 /* Addresses to scan */
  44 static unsigned short normal_i2c[] =  {
  45     I2C_TDA9875 >> 1,
  46     I2C_CLIENT_END
  47 };
  48 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
  49 I2C_CLIENT_INSMOD;
  50
  51 /* This is a superset of the TDA9875 */
  52 struct tda9875 {
  53         int mode;
  54         int rvol, lvol;
  55         int bass, treble;
  56         struct i2c_client c;
  57 };
  58
  59 static struct i2c_driver driver;
  60 static struct i2c_client client_template;
  61
  62 #define dprintk  if (debug) printk
  63
  64 /* The TDA9875 is made by Philips Semiconductor
  65  * http://www.semiconductors.philips.com
  66  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  67  *
  68  */
  69
  70                 /* subaddresses for TDA9875 */
  71 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  72 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  73 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  74 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  75
  76 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  77 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  78 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  79 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  80
  81 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  82 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  83 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  84 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  85 #define TDA9875_MVR         0x1b  /* Main volume droite */
  86 #define TDA9875_MBA         0x1d  /* Main Basse */
  87 #define TDA9875_MTR         0x1e  /* Main treble */
  88 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  89 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  90 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  91 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  92 #define TDA9875_ATR         0x23  /* Auxilary treble */
  93
  94 #define TDA9875_MSR         0x02  /* Monitor select register */
  95 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  96 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  97 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  98 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  99 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
 100 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
 101 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
 102 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
 103 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
 104
 105 /* values */
 106 #define TDA9875_MUTE_ON     0xff /* general mute */
 107 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
 108
 109
 110
 111 /* Begin code */
 112
 113 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
 114 {
 115         unsigned char buffer[2];
 116         dprintk("In tda9875_write\n");
 117         dprintk("Writing %d 0x%x\n", subaddr, val);
 118         buffer[0] = subaddr;
 119         buffer[1] = val;
 120         if (2 != i2c_master_send(client,buffer,2)) {
 121                 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 122                        subaddr, val);
 123                 return -1;
 124         }
 125         return 0;
 126 }
 127
 128 #if 0
 129 static int tda9875_read(struct i2c_client *client)
 130 {
 131         unsigned char buffer;
 132         dprintk("In tda9875_read\n");
 133         if (1 != i2c_master_recv(client,&buffer,1)) {
 134                 printk(KERN_WARNING "tda9875: I/O error, trying (read)\n");
 135                 return -1;
 136         }
 137         dprintk("Read 0x%02x\n", buffer);
 138         return buffer;
 139 }
 140 #endif
 141
 142 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 143 {
 144         unsigned char write[1];
 145         unsigned char read[1];
 146         struct i2c_msg msgs[2] = {
 147                 { addr, 0,        1, write },
 148                 { addr, I2C_M_RD, 1, read  }
 149         };
 150         write[0] = reg;
 151
 152         if (2 != i2c_transfer(adap,msgs,2)) {
 153                 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 154                 return -1;
 155         }
 156         dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 157         return read[0];
 158 }
 159
 160 static void tda9875_set(struct i2c_client *client)
 161 {
 162         struct tda9875 *tda = i2c_get_clientdata(client);
 163         unsigned char a;
 164
 165         dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 166                 tda->lvol,tda->rvol,tda->bass,tda->treble);
 167
 168
 169         a = tda->lvol & 0xff;
 170         tda9875_write(client, TDA9875_MVL, a);
 171         a =tda->rvol & 0xff;
 172         tda9875_write(client, TDA9875_MVR, a);
 173         a =tda->bass & 0xff;
 174         tda9875_write(client, TDA9875_MBA, a);
 175         a =tda->treble  & 0xff;
 176         tda9875_write(client, TDA9875_MTR, a);
 177 }
 178
 179 static void do_tda9875_init(struct i2c_client *client)
 180 {
 181         struct tda9875 *t = i2c_get_clientdata(client);
 182         dprintk("In tda9875_init\n");
 183         tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
 184         tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 185         tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 186         tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 187         tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 188         tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 189         tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 190         tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 191         tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 192         tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 193         tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 194         tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 195         tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
 196
 197         tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 198         tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 199         tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 200         tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 201         tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 202         tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 203         tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 204         tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 205         tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 206         tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 207         tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 208         tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 209         tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 210         tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 211         tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 212         tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
 213
 214         tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
 215
 216         t->mode=AUDIO_UNMUTE;
 217         t->lvol=t->rvol =0;     /* 0dB */
 218         t->bass=0;                      /* 0dB */
 219         t->treble=0;            /* 0dB */
 220         tda9875_set(client);
 221
 222 }
 223
 224
 225 /* *********************** *
 226  * i2c interface functions *
 227  * *********************** */
 228
 229 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 230 {
 231         int dic,rev;
 232
 233         dic=i2c_read_register(adap,addr,254);
 234         rev=i2c_read_register(adap,addr,255);
 235
 236         if(dic==0 || dic==2) { // tda9875 and tda9875A
 237                 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 238                 dic==0?"":"A", rev,addr<<1);
 239                 return 1;
 240         }
 241         printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 242         return(0);
 243 }
 244
 245 static int tda9875_attach(struct i2c_adapter *adap, int addr,
 246                           unsigned short flags, int kind)
 247 {
 248         struct tda9875 *t;
 249         struct i2c_client *client;
 250         dprintk("In tda9875_attach\n");
 251
 252         t = kmalloc(sizeof *t,GFP_KERNEL);
 253         if (!t)
 254                 return -ENOMEM;
 255         memset(t,0,sizeof *t);
 256
 257         client = &t->c;
 258         memcpy(client,&client_template,sizeof(struct i2c_client));
 259         client->adapter = adap;
 260         client->addr = addr;
 261         i2c_set_clientdata(client, t);
 262
 263         if(!tda9875_checkit(adap,addr)) {
 264                 kfree(t);
 265                 return 1;
 266         }
 267
 268         do_tda9875_init(client);
 269         MOD_INC_USE_COUNT;
 270         printk(KERN_INFO "tda9875: init\n");
 271
 272         i2c_attach_client(client);
 273         return 0;
 274 }
 275
 276 static int tda9875_probe(struct i2c_adapter *adap)
 277 {
 278 #ifdef I2C_ADAP_CLASS_TV_ANALOG
 279         if (adap->class & I2C_ADAP_CLASS_TV_ANALOG)
 280                 return i2c_probe(adap, &addr_data, tda9875_attach);
 281 #else
 282         if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
 283                 return i2c_probe(adap, &addr_data, tda9875_attach);
 284 #endif
 285         return 0;
 286 }
 287
 288 static int tda9875_detach(struct i2c_client *client)
 289 {
 290         struct tda9875 *t  = i2c_get_clientdata(client);
 291
 292         do_tda9875_init(client);
 293         i2c_detach_client(client);
 294
 295         kfree(t);
 296         MOD_DEC_USE_COUNT;
 297         return 0;
 298 }
 299
 300 static int tda9875_command(struct i2c_client *client,
 301                                 unsigned int cmd, void *arg)
 302 {
 303         struct tda9875 *t = i2c_get_clientdata(client);
 304
 305         dprintk("In tda9875_command...\n");
 306
 307         switch (cmd) {
 308         /* --- v4l ioctls --- */
 309         /* take care: bttv does userspace copying, we'll get a
 310            kernel pointer here... */
 311         case VIDIOCGAUDIO:
 312         {
 313                 struct video_audio *va = arg;
 314                 int left,right;
 315
 316                 dprintk("VIDIOCGAUDIO\n");
 317
 318                 va->flags |= VIDEO_AUDIO_VOLUME |
 319                         VIDEO_AUDIO_BASS |
 320                         VIDEO_AUDIO_TREBLE;
 321
 322                 /* min is -84 max is 24 */
 323                 left = (t->lvol+84)*606;
 324                 right = (t->rvol+84)*606;
 325                 va->volume=max(left,right);
 326                 va->balance=(32768*min(left,right))/
 327                         (va->volume ? va->volume : 1);
 328                 va->balance=(left<right)?
 329                         (65535-va->balance) : va->balance;
 330                 va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 331                 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 332                 va->mode |= VIDEO_SOUND_MONO;
 333
 334                 break; /* VIDIOCGAUDIO case */
 335         }
 336
 337         case VIDIOCSAUDIO:
 338         {
 339                 struct video_audio *va = arg;
 340                 int left,right;
 341
 342                 dprintk("VIDEOCSAUDIO...\n");
 343                 left = (min(65536 - va->balance,32768) *
 344                         va->volume) / 32768;
 345                 right = (min(va->balance,(__u16)32768) *
 346                          va->volume) / 32768;
 347                 t->lvol = ((left/606)-84) & 0xff;
 348                 if (t->lvol > 24)
 349                  t->lvol = 24;
 350                 if (t->lvol < -84)
 351                  t->lvol = -84 & 0xff;
 352
 353                 t->rvol = ((right/606)-84) & 0xff;
 354                 if (t->rvol > 24)
 355                  t->rvol = 24;
 356                 if (t->rvol < -84)
 357                  t->rvol = -84 & 0xff;
 358
 359                 t->bass = ((va->bass/2400)-12) & 0xff;
 360                 if (t->bass > 15)
 361                  t->bass = 15;
 362                 if (t->bass < -12)
 363                  t->bass = -12 & 0xff;
 364
 365                 t->treble = ((va->treble/2700)-12) & 0xff;
 366                 if (t->treble > 12)
 367                  t->treble = 12;
 368                 if (t->treble < -12)
 369                  t->treble = -12 & 0xff;
 370
 371
 372
 373 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
 374
 375
 376                 tda9875_set(client);
 377
 378                 break;
 379
 380         } /* end of VIDEOCSAUDIO case */
 381
 382         default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
 383
 384                 /* nothing */
 385                 dprintk("Default\n");
 386
 387         } /* end of (cmd) switch */
 388
 389         return 0;
 390 }
 391
 392
 393 static struct i2c_driver driver = {
 394         .name           = "i2c tda9875 driver",
 395         .id             = I2C_DRIVERID_TDA9875,
 396         .flags          = I2C_DF_NOTIFY,
 397         .attach_adapter = tda9875_probe,
 398         .detach_client  = tda9875_detach,
 399         .command        = tda9875_command,
 400 };
 401
 402 static struct i2c_client client_template =
 403 {
 404         I2C_DEVNAME("tda9875"),
 405         .id        = -1,
 406         .driver    = &driver,
 407 };
 408
 409 static int tda9875_init(void)
 410 {
 411         i2c_add_driver(&driver);
 412         return 0;
 413 }
 414
 415 static void tda9875_fini(void)
 416 {
 417         i2c_del_driver(&driver);
 418 }
 419
 420 module_init(tda9875_init);
 421 module_exit(tda9875_fini);
 422
 423 /*
 424  * Local variables:
 425  * c-basic-offset: 8
 426  * End:
 427  */
 428