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 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
  48 I2C_CLIENT_INSMOD;
  49
  50 /* This is a superset of the TDA9875 */
  51 struct tda9875 {
  52         int mode;
  53         int rvol, lvol;
  54         int bass, treble;
  55         struct i2c_client c;
  56 };
  57
  58 static struct i2c_driver driver;
  59 static struct i2c_client client_template;
  60
  61 #define dprintk  if (debug) printk
  62
  63 /* The TDA9875 is made by Philips Semiconductor
  64  * http://www.semiconductors.philips.com
  65  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  66  *
  67  */
  68
  69                 /* subaddresses for TDA9875 */
  70 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  71 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  72 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  73 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  74
  75 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  76 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  77 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  78 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  79
  80 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  81 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  82 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  83 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  84 #define TDA9875_MVR         0x1b  /* Main volume droite */
  85 #define TDA9875_MBA         0x1d  /* Main Basse */
  86 #define TDA9875_MTR         0x1e  /* Main treble */
  87 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  88 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  89 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  90 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  91 #define TDA9875_ATR         0x23  /* Auxilary treble */
  92
  93 #define TDA9875_MSR         0x02  /* Monitor select register */
  94 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  95 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  96 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  97 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  98 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  99 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
 100 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
 101 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
 102 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
 103
 104 /* values */
 105 #define TDA9875_MUTE_ON     0xff /* general mute */
 106 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
 107
 108
 109
 110 /* Begin code */
 111
 112 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
 113 {
 114         unsigned char buffer[2];
 115         dprintk("In tda9875_write\n");
 116         dprintk("Writing %d 0x%x\n", subaddr, val);
 117         buffer[0] = subaddr;
 118         buffer[1] = val;
 119         if (2 != i2c_master_send(client,buffer,2)) {
 120                 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 121                        subaddr, val);
 122                 return -1;
 123         }
 124         return 0;
 125 }
 126
 127 #if 0
 128 static int tda9875_read(struct i2c_client *client)
 129 {
 130         unsigned char buffer;
 131         dprintk("In tda9875_read\n");
 132         if (1 != i2c_master_recv(client,&buffer,1)) {
 133                 printk(KERN_WARNING "tda9875: I/O error, trying (read)\n");
 134                 return -1;
 135         }
 136         dprintk("Read 0x%02x\n", buffer);
 137         return buffer;
 138 }
 139 #endif
 140
 141 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 142 {
 143         unsigned char write[1];
 144         unsigned char read[1];
 145         struct i2c_msg msgs[2] = {
 146                 { addr, 0,        1, write },
 147                 { addr, I2C_M_RD, 1, read  }
 148         };
 149         write[0] = reg;
 150
 151         if (2 != i2c_transfer(adap,msgs,2)) {
 152                 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 153                 return -1;
 154         }
 155         dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 156         return read[0];
 157 }
 158
 159 static void tda9875_set(struct i2c_client *client)
 160 {
 161         struct tda9875 *tda = i2c_get_clientdata(client);
 162         unsigned char a;
 163
 164         dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 165                 tda->lvol,tda->rvol,tda->bass,tda->treble);
 166
 167
 168         a = tda->lvol & 0xff;
 169         tda9875_write(client, TDA9875_MVL, a);
 170         a =tda->rvol & 0xff;
 171         tda9875_write(client, TDA9875_MVR, a);
 172         a =tda->bass & 0xff;
 173         tda9875_write(client, TDA9875_MBA, a);
 174         a =tda->treble  & 0xff;
 175         tda9875_write(client, TDA9875_MTR, a);
 176 }
 177
 178 static void do_tda9875_init(struct i2c_client *client)
 179 {
 180         struct tda9875 *t = i2c_get_clientdata(client);
 181         dprintk("In tda9875_init\n");
 182         tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
 183         tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 184         tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 185         tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 186         tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 187         tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 188         tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 189         tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 190         tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 191         tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 192         tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 193         tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 194         tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
 195
 196         tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 197         tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 198         tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 199         tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 200         tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 201         tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 202         tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 203         tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 204         tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 205         tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 206         tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 207         tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 208         tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 209         tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 210         tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 211         tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
 212
 213         tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
 214
 215         t->mode=AUDIO_UNMUTE;
 216         t->lvol=t->rvol =0;     /* 0dB */
 217         t->bass=0;                      /* 0dB */
 218         t->treble=0;            /* 0dB */
 219         tda9875_set(client);
 220
 221 }
 222
 223
 224 /* *********************** *
 225  * i2c interface functions *
 226  * *********************** */
 227
 228 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 229 {
 230         int dic,rev;
 231
 232         dic=i2c_read_register(adap,addr,254);
 233         rev=i2c_read_register(adap,addr,255);
 234
 235         if(dic==0 || dic==2) { // tda9875 and tda9875A
 236                 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 237                 dic==0?"":"A", rev,addr<<1);
 238                 return 1;
 239         }
 240         printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 241         return(0);
 242 }
 243
 244 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
 245 {
 246         struct tda9875 *t;
 247         struct i2c_client *client;
 248         dprintk("In tda9875_attach\n");
 249
 250         t = kmalloc(sizeof *t,GFP_KERNEL);
 251         if (!t)
 252                 return -ENOMEM;
 253         memset(t,0,sizeof *t);
 254
 255         client = &t->c;
 256         memcpy(client,&client_template,sizeof(struct i2c_client));
 257         client->adapter = adap;
 258         client->addr = addr;
 259         i2c_set_clientdata(client, t);
 260
 261         if(!tda9875_checkit(adap,addr)) {
 262                 kfree(t);
 263                 return 1;
 264         }
 265
 266         do_tda9875_init(client);
 267         printk(KERN_INFO "tda9875: init\n");
 268
 269         i2c_attach_client(client);
 270         return 0;
 271 }
 272
 273 static int tda9875_probe(struct i2c_adapter *adap)
 274 {
 275 #ifdef I2C_CLASS_TV_ANALOG
 276         if (adap->class & I2C_CLASS_TV_ANALOG)
 277                 return i2c_probe(adap, &addr_data, tda9875_attach);
 278 #else
 279         if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
 280                 return i2c_probe(adap, &addr_data, tda9875_attach);
 281 #endif
 282         return 0;
 283 }
 284
 285 static int tda9875_detach(struct i2c_client *client)
 286 {
 287         struct tda9875 *t  = i2c_get_clientdata(client);
 288
 289         do_tda9875_init(client);
 290         i2c_detach_client(client);
 291
 292         kfree(t);
 293         return 0;
 294 }
 295
 296 static int tda9875_command(struct i2c_client *client,
 297                                 unsigned int cmd, void *arg)
 298 {
 299         struct tda9875 *t = i2c_get_clientdata(client);
 300
 301         dprintk("In tda9875_command...\n");
 302
 303         switch (cmd) {
 304         /* --- v4l ioctls --- */
 305         /* take care: bttv does userspace copying, we'll get a
 306            kernel pointer here... */
 307         case VIDIOCGAUDIO:
 308         {
 309                 struct video_audio *va = arg;
 310                 int left,right;
 311
 312                 dprintk("VIDIOCGAUDIO\n");
 313
 314                 va->flags |= VIDEO_AUDIO_VOLUME |
 315                         VIDEO_AUDIO_BASS |
 316                         VIDEO_AUDIO_TREBLE;
 317
 318                 /* min is -84 max is 24 */
 319                 left = (t->lvol+84)*606;
 320                 right = (t->rvol+84)*606;
 321                 va->volume=max(left,right);
 322                 va->balance=(32768*min(left,right))/
 323                         (va->volume ? va->volume : 1);
 324                 va->balance=(left<right)?
 325                         (65535-va->balance) : va->balance;
 326                 va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 327                 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 328                 va->mode |= VIDEO_SOUND_MONO;
 329
 330                 break; /* VIDIOCGAUDIO case */
 331         }
 332
 333         case VIDIOCSAUDIO:
 334         {
 335                 struct video_audio *va = arg;
 336                 int left,right;
 337
 338                 dprintk("VIDEOCSAUDIO...\n");
 339                 left = (min(65536 - va->balance,32768) *
 340                         va->volume) / 32768;
 341                 right = (min(va->balance,(__u16)32768) *
 342                          va->volume) / 32768;
 343                 t->lvol = ((left/606)-84) & 0xff;
 344                 if (t->lvol > 24)
 345                  t->lvol = 24;
 346                 if (t->lvol < -84)
 347                  t->lvol = -84 & 0xff;
 348
 349                 t->rvol = ((right/606)-84) & 0xff;
 350                 if (t->rvol > 24)
 351                  t->rvol = 24;
 352                 if (t->rvol < -84)
 353                  t->rvol = -84 & 0xff;
 354
 355                 t->bass = ((va->bass/2400)-12) & 0xff;
 356                 if (t->bass > 15)
 357                  t->bass = 15;
 358                 if (t->bass < -12)
 359                  t->bass = -12 & 0xff;
 360
 361                 t->treble = ((va->treble/2700)-12) & 0xff;
 362                 if (t->treble > 12)
 363                  t->treble = 12;
 364                 if (t->treble < -12)
 365                  t->treble = -12 & 0xff;
 366
 367
 368
 369 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
 370
 371
 372                 tda9875_set(client);
 373
 374                 break;
 375
 376         } /* end of VIDEOCSAUDIO case */
 377
 378         default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
 379
 380                 /* nothing */
 381                 dprintk("Default\n");
 382
 383         } /* end of (cmd) switch */
 384
 385         return 0;
 386 }
 387
 388
 389 static struct i2c_driver driver = {
 390         .owner          = THIS_MODULE,
 391         .name           = "i2c tda9875 driver",
 392         .id             = I2C_DRIVERID_TDA9875,
 393         .flags          = I2C_DF_NOTIFY,
 394         .attach_adapter = tda9875_probe,
 395         .detach_client  = tda9875_detach,
 396         .command        = tda9875_command,
 397 };
 398
 399 static struct i2c_client client_template =
 400 {
 401         I2C_DEVNAME("tda9875"),
 402         .driver    = &driver,
 403 };
 404
 405 static int __init tda9875_init(void)
 406 {
 407         return i2c_add_driver(&driver);
 408 }
 409
 410 static void __exit tda9875_fini(void)
 411 {
 412         i2c_del_driver(&driver);
 413 }
 414
 415 module_init(tda9875_init);
 416 module_exit(tda9875_fini);
 417
 418 /*
 419  * Local variables:
 420  * c-basic-offset: 8
 421  * End:
 422  */
 423