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
  36 static int debug; /* insmod parameter */
  37 module_param(debug, int, S_IRUGO | S_IWUSR);
  38 MODULE_LICENSE("GPL");
  39
  40
  41 /* Addresses to scan */
  42 static unsigned short normal_i2c[] =  {
  43     I2C_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 mode;
  51         int rvol, lvol;
  52         int bass, treble;
  53         struct i2c_client c;
  54 };
  55
  56 static struct i2c_driver driver;
  57 static struct i2c_client client_template;
  58
  59 #define dprintk  if (debug) printk
  60
  61 /* The TDA9875 is made by Philips Semiconductor
  62  * http://www.semiconductors.philips.com
  63  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
  64  *
  65  */
  66
  67                 /* subaddresses for TDA9875 */
  68 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
  69 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
  70 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
  71 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
  72
  73 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
  74 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
  75 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
  76 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
  77
  78 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
  79 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
  80 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
  81 #define TDA9875_MVL         0x1a  /* Main volume gauche */
  82 #define TDA9875_MVR         0x1b  /* Main volume droite */
  83 #define TDA9875_MBA         0x1d  /* Main Basse */
  84 #define TDA9875_MTR         0x1e  /* Main treble */
  85 #define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
  86 #define TDA9875_AVL         0x20  /* Auxilary volume gauche */
  87 #define TDA9875_AVR         0x21  /* Auxilary volume droite */
  88 #define TDA9875_ABA         0x22  /* Auxilary Basse */
  89 #define TDA9875_ATR         0x23  /* Auxilary treble */
  90
  91 #define TDA9875_MSR         0x02  /* Monitor select register */
  92 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
  93 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
  94 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
  95 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
  96 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
  97 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
  98 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
  99 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
 100 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
 101
 102 /* values */
 103 #define TDA9875_MUTE_ON     0xff /* general mute */
 104 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
 105
 106
 107
 108 /* Begin code */
 109
 110 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
 111 {
 112         unsigned char buffer[2];
 113         dprintk("In tda9875_write\n");
 114         dprintk("Writing %d 0x%x\n", subaddr, val);
 115         buffer[0] = subaddr;
 116         buffer[1] = val;
 117         if (2 != i2c_master_send(client,buffer,2)) {
 118                 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
 119                        subaddr, val);
 120                 return -1;
 121         }
 122         return 0;
 123 }
 124
 125
 126 static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
 127 {
 128         unsigned char write[1];
 129         unsigned char read[1];
 130         struct i2c_msg msgs[2] = {
 131                 { addr, 0,        1, write },
 132                 { addr, I2C_M_RD, 1, read  }
 133         };
 134         write[0] = reg;
 135
 136         if (2 != i2c_transfer(adap,msgs,2)) {
 137                 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
 138                 return -1;
 139         }
 140         dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
 141         return read[0];
 142 }
 143
 144 static void tda9875_set(struct i2c_client *client)
 145 {
 146         struct tda9875 *tda = i2c_get_clientdata(client);
 147         unsigned char a;
 148
 149         dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
 150                 tda->lvol,tda->rvol,tda->bass,tda->treble);
 151
 152
 153         a = tda->lvol & 0xff;
 154         tda9875_write(client, TDA9875_MVL, a);
 155         a =tda->rvol & 0xff;
 156         tda9875_write(client, TDA9875_MVR, a);
 157         a =tda->bass & 0xff;
 158         tda9875_write(client, TDA9875_MBA, a);
 159         a =tda->treble  & 0xff;
 160         tda9875_write(client, TDA9875_MTR, a);
 161 }
 162
 163 static void do_tda9875_init(struct i2c_client *client)
 164 {
 165         struct tda9875 *t = i2c_get_clientdata(client);
 166         dprintk("In tda9875_init\n");
 167         tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
 168         tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
 169         tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
 170         tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
 171         tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
 172         tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
 173         tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
 174         tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
 175         tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
 176         tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
 177         tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
 178         tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
 179         tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
 180
 181         tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Channel volume 1 mute*/
 182         tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Channel volume 2 mute */
 183         tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
 184         tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
 185         tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
 186         tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
 187         tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
 188         tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
 189         tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
 190         tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
 191         tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
 192         tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/
 193         tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
 194         tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
 195         tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
 196         tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
 197
 198         tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
 199
 200         t->mode=AUDIO_UNMUTE;
 201         t->lvol=t->rvol =0;     /* 0dB */
 202         t->bass=0;                      /* 0dB */
 203         t->treble=0;            /* 0dB */
 204         tda9875_set(client);
 205
 206 }
 207
 208
 209 /* *********************** *
 210  * i2c interface functions *
 211  * *********************** */
 212
 213 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
 214 {
 215         int dic,rev;
 216
 217         dic=i2c_read_register(adap,addr,254);
 218         rev=i2c_read_register(adap,addr,255);
 219
 220         if(dic==0 || dic==2) { // tda9875 and tda9875A
 221                 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
 222                 dic==0?"":"A", rev,addr<<1);
 223                 return 1;
 224         }
 225         printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
 226         return(0);
 227 }
 228
 229 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
 230 {
 231         struct tda9875 *t;
 232         struct i2c_client *client;
 233         dprintk("In tda9875_attach\n");
 234
 235         t = kmalloc(sizeof *t,GFP_KERNEL);
 236         if (!t)
 237                 return -ENOMEM;
 238         memset(t,0,sizeof *t);
 239
 240         client = &t->c;
 241         memcpy(client,&client_template,sizeof(struct i2c_client));
 242         client->adapter = adap;
 243         client->addr = addr;
 244         i2c_set_clientdata(client, t);
 245
 246         if(!tda9875_checkit(adap,addr)) {
 247                 kfree(t);
 248                 return 1;
 249         }
 250
 251         do_tda9875_init(client);
 252         printk(KERN_INFO "tda9875: init\n");
 253
 254         i2c_attach_client(client);
 255         return 0;
 256 }
 257
 258 static int tda9875_probe(struct i2c_adapter *adap)
 259 {
 260 #ifdef I2C_CLASS_TV_ANALOG
 261         if (adap->class & I2C_CLASS_TV_ANALOG)
 262                 return i2c_probe(adap, &addr_data, tda9875_attach);
 263 #else
 264         if (adap->id == I2C_HW_B_BT848)
 265                 return i2c_probe(adap, &addr_data, tda9875_attach);
 266 #endif
 267         return 0;
 268 }
 269
 270 static int tda9875_detach(struct i2c_client *client)
 271 {
 272         struct tda9875 *t  = i2c_get_clientdata(client);
 273
 274         do_tda9875_init(client);
 275         i2c_detach_client(client);
 276
 277         kfree(t);
 278         return 0;
 279 }
 280
 281 static int tda9875_command(struct i2c_client *client,
 282                                 unsigned int cmd, void *arg)
 283 {
 284         struct tda9875 *t = i2c_get_clientdata(client);
 285
 286         dprintk("In tda9875_command...\n");
 287
 288         switch (cmd) {
 289         /* --- v4l ioctls --- */
 290         /* take care: bttv does userspace copying, we'll get a
 291            kernel pointer here... */
 292         case VIDIOCGAUDIO:
 293         {
 294                 struct video_audio *va = arg;
 295                 int left,right;
 296
 297                 dprintk("VIDIOCGAUDIO\n");
 298
 299                 va->flags |= VIDEO_AUDIO_VOLUME |
 300                         VIDEO_AUDIO_BASS |
 301                         VIDEO_AUDIO_TREBLE;
 302
 303                 /* min is -84 max is 24 */
 304                 left = (t->lvol+84)*606;
 305                 right = (t->rvol+84)*606;
 306                 va->volume=max(left,right);
 307                 va->balance=(32768*min(left,right))/
 308                         (va->volume ? va->volume : 1);
 309                 va->balance=(left<right)?
 310                         (65535-va->balance) : va->balance;
 311                 va->bass = (t->bass+12)*2427;    /* min -12 max +15 */
 312                 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
 313                 va->mode |= VIDEO_SOUND_MONO;
 314
 315                 break; /* VIDIOCGAUDIO case */
 316         }
 317
 318         case VIDIOCSAUDIO:
 319         {
 320                 struct video_audio *va = arg;
 321                 int left,right;
 322
 323                 dprintk("VIDEOCSAUDIO...\n");
 324                 left = (min(65536 - va->balance,32768) *
 325                         va->volume) / 32768;
 326                 right = (min(va->balance,(__u16)32768) *
 327                          va->volume) / 32768;
 328                 t->lvol = ((left/606)-84) & 0xff;
 329                 if (t->lvol > 24)
 330                  t->lvol = 24;
 331                 if (t->lvol < -84)
 332                  t->lvol = -84 & 0xff;
 333
 334                 t->rvol = ((right/606)-84) & 0xff;
 335                 if (t->rvol > 24)
 336                  t->rvol = 24;
 337                 if (t->rvol < -84)
 338                  t->rvol = -84 & 0xff;
 339
 340                 t->bass = ((va->bass/2400)-12) & 0xff;
 341                 if (t->bass > 15)
 342                  t->bass = 15;
 343                 if (t->bass < -12)
 344                  t->bass = -12 & 0xff;
 345
 346                 t->treble = ((va->treble/2700)-12) & 0xff;
 347                 if (t->treble > 12)
 348                  t->treble = 12;
 349                 if (t->treble < -12)
 350                  t->treble = -12 & 0xff;
 351
 352
 353
 354 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
 355
 356
 357                 tda9875_set(client);
 358
 359                 break;
 360
 361         } /* end of VIDEOCSAUDIO case */
 362
 363         default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
 364
 365                 /* nothing */
 366                 dprintk("Default\n");
 367
 368         } /* end of (cmd) switch */
 369
 370         return 0;
 371 }
 372
 373
 374 static struct i2c_driver driver = {
 375         .owner          = THIS_MODULE,
 376         .name           = "i2c tda9875 driver",
 377         .id             = I2C_DRIVERID_TDA9875,
 378         .flags          = I2C_DF_NOTIFY,
 379         .attach_adapter = tda9875_probe,
 380         .detach_client  = tda9875_detach,
 381         .command        = tda9875_command,
 382 };
 383
 384 static struct i2c_client client_template =
 385 {
 386         .name      = "tda9875",
 387         .driver    = &driver,
 388 };
 389
 390 static int __init tda9875_init(void)
 391 {
 392         return i2c_add_driver(&driver);
 393 }
 394
 395 static void __exit tda9875_fini(void)
 396 {
 397         i2c_del_driver(&driver);
 398 }
 399
 400 module_init(tda9875_init);
 401 module_exit(tda9875_fini);
 402
 403 /*
 404  * Local variables:
 405  * c-basic-offset: 8
 406  * End:
 407  */
 408