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 * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org> 11 * This code is placed under the terms of the GNU General Public License 12 * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu) 13 * Which was based on tda8425.c by Greg Alexander (c) 1998 14 * 15 * OPTIONS: 16 * debug - set to 1 if you'd like to see debug messages 17 * 18 * Revision: 0.1 - original version 19 */ 20 21#include <linux/module.h> 22#include <linux/kernel.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/i2c.h> 29#include <linux/videodev2.h> 30#include <media/v4l2-device.h> 31#include <media/v4l2-i2c-drv.h> 32#include <media/i2c-addr.h> 33 34static int debug; /* insmod parameter */ 35module_param(debug, int, S_IRUGO | S_IWUSR); 36MODULE_LICENSE("GPL"); 37 38 39/* This is a superset of the TDA9875 */ 40struct tda9875 { 41 struct v4l2_subdev sd; 42 int rvol, lvol; 43 int bass, treble; 44}; 45 46static inline struct tda9875 *to_state(struct v4l2_subdev *sd) 47{ 48 return container_of(sd, struct tda9875, sd); 49} 50 51#define dprintk if (debug) printk 52 53/* The TDA9875 is made by Philips Semiconductor 54 * http://www.semiconductors.philips.com 55 * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator 56 * 57 */ 58 59 /* subaddresses for TDA9875 */ 60#define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/ 61#define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */ 62#define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/ 63#define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/ 64 65#define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/ 66#define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/ 67#define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/ 68#define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/ 69 70#define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/ 71#define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/ 72#define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/ 73#define TDA9875_MVL 0x1a /* Main volume gauche */ 74#define TDA9875_MVR 0x1b /* Main volume droite */ 75#define TDA9875_MBA 0x1d /* Main Basse */ 76#define TDA9875_MTR 0x1e /* Main treble */ 77#define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/ 78#define TDA9875_AVL 0x20 /* Auxilary volume gauche */ 79#define TDA9875_AVR 0x21 /* Auxilary volume droite */ 80#define TDA9875_ABA 0x22 /* Auxilary Basse */ 81#define TDA9875_ATR 0x23 /* Auxilary treble */ 82 83#define TDA9875_MSR 0x02 /* Monitor select register */ 84#define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */ 85#define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */ 86#define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */ 87#define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */ 88#define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */ 89#define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */ 90#define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/ 91#define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/ 92#define TDA9875_FMAT 0x0b /* FM Matrix regirter*/ 93 94/* values */ 95#define TDA9875_MUTE_ON 0xff /* general mute */ 96#define TDA9875_MUTE_OFF 0xcc /* general no mute */ 97 98 99 100/* Begin code */ 101 102static int tda9875_write(struct v4l2_subdev *sd, int subaddr, unsigned char val) 103{ 104 struct i2c_client *client = v4l2_get_subdevdata(sd); 105 unsigned char buffer[2]; 106 107 v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val); 108 buffer[0] = subaddr; 109 buffer[1] = val; 110 if (2 != i2c_master_send(client, buffer, 2)) { 111 v4l2_warn(sd, "I/O error, trying (write %d 0x%x)\n", 112 subaddr, val); 113 return -1; 114 } 115 return 0; 116} 117 118 119static int i2c_read_register(struct i2c_client *client, int addr, int reg) 120{ 121 unsigned char write[1]; 122 unsigned char read[1]; 123 struct i2c_msg msgs[2] = { 124 { addr, 0, 1, write }, 125 { addr, I2C_M_RD, 1, read } 126 }; 127 128 write[0] = reg; 129 130 if (2 != i2c_transfer(client->adapter, msgs, 2)) { 131 v4l_warn(client, "I/O error (read2)\n"); 132 return -1; 133 } 134 v4l_dbg(1, debug, client, "chip_read2: reg%d=0x%x\n", reg, read[0]); 135 return read[0]; 136} 137 138static void tda9875_set(struct v4l2_subdev *sd) 139{ 140 struct tda9875 *tda = to_state(sd); 141 unsigned char a; 142 143 v4l2_dbg(1, debug, sd, "tda9875_set(%04x,%04x,%04x,%04x)\n", 144 tda->lvol, tda->rvol, tda->bass, tda->treble); 145 146 a = tda->lvol & 0xff; 147 tda9875_write(sd, TDA9875_MVL, a); 148 a =tda->rvol & 0xff; 149 tda9875_write(sd, TDA9875_MVR, a); 150 a =tda->bass & 0xff; 151 tda9875_write(sd, TDA9875_MBA, a); 152 a =tda->treble & 0xff; 153 tda9875_write(sd, TDA9875_MTR, a); 154} 155 156static void do_tda9875_init(struct v4l2_subdev *sd) 157{ 158 struct tda9875 *t = to_state(sd); 159 160 v4l2_dbg(1, debug, sd, "In tda9875_init\n"); 161 tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/ 162 tda9875_write(sd, TDA9875_MSR, 0x03); /* Monitor 0b00000XXX*/ 163 tda9875_write(sd, TDA9875_C1MSB, 0x00); /*Car1(FM) MSB XMHz*/ 164 tda9875_write(sd, TDA9875_C1MIB, 0x00); /*Car1(FM) MIB XMHz*/ 165 tda9875_write(sd, TDA9875_C1LSB, 0x00); /*Car1(FM) LSB XMHz*/ 166 tda9875_write(sd, TDA9875_C2MSB, 0x00); /*Car2(NICAM) MSB XMHz*/ 167 tda9875_write(sd, TDA9875_C2MIB, 0x00); /*Car2(NICAM) MIB XMHz*/ 168 tda9875_write(sd, TDA9875_C2LSB, 0x00); /*Car2(NICAM) LSB XMHz*/ 169 tda9875_write(sd, TDA9875_DCR, 0x00); /*Demod config 0x00*/ 170 tda9875_write(sd, TDA9875_DEEM, 0x44); /*DE-Emph 0b0100 0100*/ 171 tda9875_write(sd, TDA9875_FMAT, 0x00); /*FM Matrix reg 0x00*/ 172 tda9875_write(sd, TDA9875_SC1, 0x00); /* SCART 1 (SC1)*/ 173 tda9875_write(sd, TDA9875_SC2, 0x01); /* SCART 2 (sc2)*/ 174 175 tda9875_write(sd, TDA9875_CH1V, 0x10); /* Channel volume 1 mute*/ 176 tda9875_write(sd, TDA9875_CH2V, 0x10); /* Channel volume 2 mute */ 177 tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/ 178 tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/ 179 tda9875_write(sd, TDA9875_LOSR, 0x00); /* line out (in:mono)*/ 180 tda9875_write(sd, TDA9875_AER, 0x00); /*06 Effect (AVL+PSEUDO) */ 181 tda9875_write(sd, TDA9875_MCS, 0x44); /* Main ch select (DAC) */ 182 tda9875_write(sd, TDA9875_MVL, 0x03); /* Vol Main left 10dB */ 183 tda9875_write(sd, TDA9875_MVR, 0x03); /* Vol Main right 10dB*/ 184 tda9875_write(sd, TDA9875_MBA, 0x00); /* Main Bass Main 0dB*/ 185 tda9875_write(sd, TDA9875_MTR, 0x00); /* Main Treble Main 0dB*/ 186 tda9875_write(sd, TDA9875_ACS, 0x44); /* Aux chan select (dac)*/ 187 tda9875_write(sd, TDA9875_AVL, 0x00); /* Vol Aux left 0dB*/ 188 tda9875_write(sd, TDA9875_AVR, 0x00); /* Vol Aux right 0dB*/ 189 tda9875_write(sd, TDA9875_ABA, 0x00); /* Aux Bass Main 0dB*/ 190 tda9875_write(sd, TDA9875_ATR, 0x00); /* Aux Aigus Main 0dB*/ 191 192 tda9875_write(sd, TDA9875_MUT, 0xcc); /* General mute */ 193 194 t->lvol = t->rvol = 0; /* 0dB */ 195 t->bass = 0; /* 0dB */ 196 t->treble = 0; /* 0dB */ 197 tda9875_set(sd); 198} 199 200 201static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) 202{ 203 struct tda9875 *t = to_state(sd); 204 205 switch (ctrl->id) { 206 case V4L2_CID_AUDIO_VOLUME: 207 { 208 int left = (t->lvol+84)*606; 209 int right = (t->rvol+84)*606; 210 211 ctrl->value=max(left,right); 212 return 0; 213 } 214 case V4L2_CID_AUDIO_BALANCE: 215 { 216 int left = (t->lvol+84)*606; 217 int right = (t->rvol+84)*606; 218 int volume = max(left,right); 219 int balance = (32768*min(left,right))/ 220 (volume ? volume : 1); 221 ctrl->value=(left<right)? 222 (65535-balance) : balance; 223 return 0; 224 } 225 case V4L2_CID_AUDIO_BASS: 226 ctrl->value = (t->bass+12)*2427; /* min -12 max +15 */ 227 return 0; 228 case V4L2_CID_AUDIO_TREBLE: 229 ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */ 230 return 0; 231 } 232 return -EINVAL; 233} 234 235static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) 236{ 237 struct tda9875 *t = to_state(sd); 238 int chvol = 0, volume = 0, balance = 0, left, right; 239 240 switch (ctrl->id) { 241 case V4L2_CID_AUDIO_VOLUME: 242 left = (t->lvol+84)*606; 243 right = (t->rvol+84)*606; 244 245 volume = max(left,right); 246 balance = (32768*min(left,right))/ 247 (volume ? volume : 1); 248 balance =(left<right)? 249 (65535-balance) : balance; 250 251 volume = ctrl->value; 252 253 chvol=1; 254 break; 255 case V4L2_CID_AUDIO_BALANCE: 256 left = (t->lvol+84)*606; 257 right = (t->rvol+84)*606; 258 259 volume=max(left,right); 260 261 balance = ctrl->value; 262 263 chvol=1; 264 break; 265 case V4L2_CID_AUDIO_BASS: 266 t->bass = ((ctrl->value/2400)-12) & 0xff; 267 if (t->bass > 15) 268 t->bass = 15; 269 if (t->bass < -12) 270 t->bass = -12 & 0xff; 271 break; 272 case V4L2_CID_AUDIO_TREBLE: 273 t->treble = ((ctrl->value/2700)-12) & 0xff; 274 if (t->treble > 12) 275 t->treble = 12; 276 if (t->treble < -12) 277 t->treble = -12 & 0xff; 278 break; 279 default: 280 return -EINVAL; 281 } 282 283 if (chvol) { 284 left = (min(65536 - balance,32768) * 285 volume) / 32768; 286 right = (min(balance,32768) * 287 volume) / 32768; 288 t->lvol = ((left/606)-84) & 0xff; 289 if (t->lvol > 24) 290 t->lvol = 24; 291 if (t->lvol < -84) 292 t->lvol = -84 & 0xff; 293 294 t->rvol = ((right/606)-84) & 0xff; 295 if (t->rvol > 24) 296 t->rvol = 24; 297 if (t->rvol < -84) 298 t->rvol = -84 & 0xff; 299 } 300 301 tda9875_set(sd); 302 return 0; 303} 304 305static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc) 306{ 307 switch (qc->id) { 308 case V4L2_CID_AUDIO_VOLUME: 309 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880); 310 case V4L2_CID_AUDIO_BASS: 311 case V4L2_CID_AUDIO_TREBLE: 312 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768); 313 } 314 return -EINVAL; 315} 316 317/* ----------------------------------------------------------------------- */ 318 319static const struct v4l2_subdev_core_ops tda9875_core_ops = { 320 .queryctrl = tda9875_queryctrl, 321 .g_ctrl = tda9875_g_ctrl, 322 .s_ctrl = tda9875_s_ctrl, 323}; 324 325static const struct v4l2_subdev_ops tda9875_ops = { 326 .core = &tda9875_core_ops, 327}; 328 329/* ----------------------------------------------------------------------- */ 330 331 332/* *********************** * 333 * i2c interface functions * 334 * *********************** */ 335 336static int tda9875_checkit(struct i2c_client *client, int addr) 337{ 338 int dic, rev; 339 340 dic = i2c_read_register(client, addr, 254); 341 rev = i2c_read_register(client, addr, 255); 342 343 if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */ 344 v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\n", 345 dic == 0 ? "" : "A", rev, addr << 1); 346 return 1; 347 } 348 v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n", 349 addr << 1, dic, rev); 350 return 0; 351} 352 353static int tda9875_probe(struct i2c_client *client, 354 const struct i2c_device_id *id) 355{ 356 struct tda9875 *t; 357 struct v4l2_subdev *sd; 358 359 v4l_info(client, "chip found @ 0x%02x (%s)\n", 360 client->addr << 1, client->adapter->name); 361 362 if (!tda9875_checkit(client, client->addr)) 363 return -ENODEV; 364 365 t = kzalloc(sizeof(*t), GFP_KERNEL); 366 if (!t) 367 return -ENOMEM; 368 sd = &t->sd; 369 v4l2_i2c_subdev_init(sd, client, &tda9875_ops); 370 371 do_tda9875_init(sd); 372 return 0; 373} 374 375static int tda9875_remove(struct i2c_client *client) 376{ 377 struct v4l2_subdev *sd = i2c_get_clientdata(client); 378 379 do_tda9875_init(sd); 380 v4l2_device_unregister_subdev(sd); 381 kfree(to_state(sd)); 382 return 0; 383} 384 385static const struct i2c_device_id tda9875_id[] = { 386 { "tda9875", 0 }, 387 { } 388}; 389MODULE_DEVICE_TABLE(i2c, tda9875_id); 390 391static struct v4l2_i2c_driver_data v4l2_i2c_data = { 392 .name = "tda9875", 393 .probe = tda9875_probe, 394 .remove = tda9875_remove, 395 .id_table = tda9875_id, 396}; 397