1/* 2 * saa7111 - Philips SAA7111A video decoder driver version 0.0.3 3 * 4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net> 5 * 6 * Slight changes for video timing and attachment output by 7 * Wolfgang Scherr <scherr@net4you.net> 8 * 9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> 10 * - moved over to linux>=2.4.x i2c protocol (1/1/2003) 11 * 12 * Changes by Michael Hunold <michael@mihu.de> 13 * - implemented DECODER_SET_GPIO, DECODER_INIT, DECODER_SET_VBI_BYPASS 14 * 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, write to the Free Software 27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 28 */ 29 30#include <linux/module.h> 31#include <linux/init.h> 32#include <linux/delay.h> 33#include <linux/errno.h> 34#include <linux/fs.h> 35#include <linux/kernel.h> 36#include <linux/major.h> 37#include <linux/slab.h> 38#include <linux/mm.h> 39#include <linux/signal.h> 40#include <asm/io.h> 41#include <asm/pgtable.h> 42#include <asm/page.h> 43#include <linux/types.h> 44 45#include <linux/videodev.h> 46#include <asm/uaccess.h> 47 48MODULE_DESCRIPTION("Philips SAA7111 video decoder driver"); 49MODULE_AUTHOR("Dave Perks"); 50MODULE_LICENSE("GPL"); 51 52#include <linux/i2c.h> 53 54#define I2C_NAME(s) (s)->name 55 56#include <linux/video_decoder.h> 57 58static int debug = 0; 59module_param(debug, int, 0644); 60MODULE_PARM_DESC(debug, "Debug level (0-1)"); 61 62#define dprintk(num, format, args...) \ 63 do { \ 64 if (debug >= num) \ 65 printk(format, ##args); \ 66 } while (0) 67 68/* ----------------------------------------------------------------------- */ 69 70#define SAA7111_NR_REG 0x18 71 72struct saa7111 { 73 unsigned char reg[SAA7111_NR_REG]; 74 75 int norm; 76 int input; 77 int enable; 78}; 79 80#define I2C_SAA7111 0x48 81 82/* ----------------------------------------------------------------------- */ 83 84static inline int 85saa7111_write (struct i2c_client *client, 86 u8 reg, 87 u8 value) 88{ 89 struct saa7111 *decoder = i2c_get_clientdata(client); 90 91 decoder->reg[reg] = value; 92 return i2c_smbus_write_byte_data(client, reg, value); 93} 94 95static inline void 96saa7111_write_if_changed(struct i2c_client *client, u8 reg, u8 value) 97{ 98 struct saa7111 *decoder = i2c_get_clientdata(client); 99 100 if (decoder->reg[reg] != value) { 101 decoder->reg[reg] = value; 102 i2c_smbus_write_byte_data(client, reg, value); 103 } 104} 105 106static int 107saa7111_write_block (struct i2c_client *client, 108 const u8 *data, 109 unsigned int len) 110{ 111 int ret = -1; 112 u8 reg; 113 114 /* the saa7111 has an autoincrement function, use it if 115 * the adapter understands raw I2C */ 116 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 117 /* do raw I2C, not smbus compatible */ 118 struct saa7111 *decoder = i2c_get_clientdata(client); 119 u8 block_data[32]; 120 int block_len; 121 122 while (len >= 2) { 123 block_len = 0; 124 block_data[block_len++] = reg = data[0]; 125 do { 126 block_data[block_len++] = 127 decoder->reg[reg++] = data[1]; 128 len -= 2; 129 data += 2; 130 } while (len >= 2 && data[0] == reg && 131 block_len < 32); 132 if ((ret = i2c_master_send(client, block_data, 133 block_len)) < 0) 134 break; 135 } 136 } else { 137 /* do some slow I2C emulation kind of thing */ 138 while (len >= 2) { 139 reg = *data++; 140 if ((ret = saa7111_write(client, reg, 141 *data++)) < 0) 142 break; 143 len -= 2; 144 } 145 } 146 147 return ret; 148} 149 150static int 151saa7111_init_decoder (struct i2c_client *client, 152 struct video_decoder_init *init) 153{ 154 return saa7111_write_block(client, init->data, init->len); 155} 156 157static inline int 158saa7111_read (struct i2c_client *client, 159 u8 reg) 160{ 161 return i2c_smbus_read_byte_data(client, reg); 162} 163 164/* ----------------------------------------------------------------------- */ 165 166static const unsigned char saa7111_i2c_init[] = { 167 0x00, 0x00, /* 00 - ID byte */ 168 0x01, 0x00, /* 01 - reserved */ 169 170 /*front end */ 171 0x02, 0xd0, /* 02 - FUSE=3, GUDL=2, MODE=0 */ 172 0x03, 0x23, /* 03 - HLNRS=0, VBSL=1, WPOFF=0, 173 * HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */ 174 0x04, 0x00, /* 04 - GAI1=256 */ 175 0x05, 0x00, /* 05 - GAI2=256 */ 176 177 /* decoder */ 178 0x06, 0xf3, /* 06 - HSB at 13(50Hz) / 17(60Hz) 179 * pixels after end of last line */ 180 /*0x07, 0x13, * 07 - HSS at 113(50Hz) / 117(60Hz) pixels 181 * after end of last line */ 182 0x07, 0xe8, /* 07 - HSS seems to be needed to 183 * work with NTSC, too */ 184 0x08, 0xc8, /* 08 - AUFD=1, FSEL=1, EXFIL=0, 185 * VTRC=1, HPLL=0, VNOI=0 */ 186 0x09, 0x01, /* 09 - BYPS=0, PREF=0, BPSS=0, 187 * VBLB=0, UPTCV=0, APER=1 */ 188 0x0a, 0x80, /* 0a - BRIG=128 */ 189 0x0b, 0x47, /* 0b - CONT=1.109 */ 190 0x0c, 0x40, /* 0c - SATN=1.0 */ 191 0x0d, 0x00, /* 0d - HUE=0 */ 192 0x0e, 0x01, /* 0e - CDTO=0, CSTD=0, DCCF=0, 193 * FCTC=0, CHBW=1 */ 194 0x0f, 0x00, /* 0f - reserved */ 195 0x10, 0x48, /* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */ 196 0x11, 0x1c, /* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1, 197 * OEYC=1, OEHV=1, VIPB=0, COLO=0 */ 198 0x12, 0x00, /* 12 - output control 2 */ 199 0x13, 0x00, /* 13 - output control 3 */ 200 0x14, 0x00, /* 14 - reserved */ 201 0x15, 0x00, /* 15 - VBI */ 202 0x16, 0x00, /* 16 - VBI */ 203 0x17, 0x00, /* 17 - VBI */ 204}; 205 206static int 207saa7111_command (struct i2c_client *client, 208 unsigned int cmd, 209 void *arg) 210{ 211 struct saa7111 *decoder = i2c_get_clientdata(client); 212 213 switch (cmd) { 214 215 case 0: 216 break; 217 case DECODER_INIT: 218 { 219 struct video_decoder_init *init = arg; 220 if (NULL != init) 221 return saa7111_init_decoder(client, init); 222 else { 223 struct video_decoder_init vdi; 224 vdi.data = saa7111_i2c_init; 225 vdi.len = sizeof(saa7111_i2c_init); 226 return saa7111_init_decoder(client, &vdi); 227 } 228 } 229 230 case DECODER_DUMP: 231 { 232 int i; 233 234 for (i = 0; i < SAA7111_NR_REG; i += 16) { 235 int j; 236 237 printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i); 238 for (j = 0; j < 16 && i + j < SAA7111_NR_REG; ++j) { 239 printk(" %02x", 240 saa7111_read(client, i + j)); 241 } 242 printk("\n"); 243 } 244 } 245 break; 246 247 case DECODER_GET_CAPABILITIES: 248 { 249 struct video_decoder_capability *cap = arg; 250 251 cap->flags = VIDEO_DECODER_PAL | 252 VIDEO_DECODER_NTSC | 253 VIDEO_DECODER_SECAM | 254 VIDEO_DECODER_AUTO | 255 VIDEO_DECODER_CCIR; 256 cap->inputs = 8; 257 cap->outputs = 1; 258 } 259 break; 260 261 case DECODER_GET_STATUS: 262 { 263 int *iarg = arg; 264 int status; 265 int res; 266 267 status = saa7111_read(client, 0x1f); 268 dprintk(1, KERN_DEBUG "%s status: 0x%02x\n", I2C_NAME(client), 269 status); 270 res = 0; 271 if ((status & (1 << 6)) == 0) { 272 res |= DECODER_STATUS_GOOD; 273 } 274 switch (decoder->norm) { 275 case VIDEO_MODE_NTSC: 276 res |= DECODER_STATUS_NTSC; 277 break; 278 case VIDEO_MODE_PAL: 279 res |= DECODER_STATUS_PAL; 280 break; 281 case VIDEO_MODE_SECAM: 282 res |= DECODER_STATUS_SECAM; 283 break; 284 default: 285 case VIDEO_MODE_AUTO: 286 if ((status & (1 << 5)) != 0) { 287 res |= DECODER_STATUS_NTSC; 288 } else { 289 res |= DECODER_STATUS_PAL; 290 } 291 break; 292 } 293 if ((status & (1 << 0)) != 0) { 294 res |= DECODER_STATUS_COLOR; 295 } 296 *iarg = res; 297 } 298 break; 299 300 case DECODER_SET_GPIO: 301 { 302 int *iarg = arg; 303 if (0 != *iarg) { 304 saa7111_write(client, 0x11, 305 (decoder->reg[0x11] | 0x80)); 306 } else { 307 saa7111_write(client, 0x11, 308 (decoder->reg[0x11] & 0x7f)); 309 } 310 break; 311 } 312 313 case DECODER_SET_VBI_BYPASS: 314 { 315 int *iarg = arg; 316 if (0 != *iarg) { 317 saa7111_write(client, 0x13, 318 (decoder->reg[0x13] & 0xf0) | 0x0a); 319 } else { 320 saa7111_write(client, 0x13, 321 (decoder->reg[0x13] & 0xf0)); 322 } 323 break; 324 } 325 326 case DECODER_SET_NORM: 327 { 328 int *iarg = arg; 329 330 switch (*iarg) { 331 332 case VIDEO_MODE_NTSC: 333 saa7111_write(client, 0x08, 334 (decoder->reg[0x08] & 0x3f) | 0x40); 335 saa7111_write(client, 0x0e, 336 (decoder->reg[0x0e] & 0x8f)); 337 break; 338 339 case VIDEO_MODE_PAL: 340 saa7111_write(client, 0x08, 341 (decoder->reg[0x08] & 0x3f) | 0x00); 342 saa7111_write(client, 0x0e, 343 (decoder->reg[0x0e] & 0x8f)); 344 break; 345 346 case VIDEO_MODE_SECAM: 347 saa7111_write(client, 0x08, 348 (decoder->reg[0x08] & 0x3f) | 0x00); 349 saa7111_write(client, 0x0e, 350 (decoder->reg[0x0e] & 0x8f) | 0x50); 351 break; 352 353 case VIDEO_MODE_AUTO: 354 saa7111_write(client, 0x08, 355 (decoder->reg[0x08] & 0x3f) | 0x80); 356 saa7111_write(client, 0x0e, 357 (decoder->reg[0x0e] & 0x8f)); 358 break; 359 360 default: 361 return -EINVAL; 362 363 } 364 decoder->norm = *iarg; 365 } 366 break; 367 368 case DECODER_SET_INPUT: 369 { 370 int *iarg = arg; 371 372 if (*iarg < 0 || *iarg > 7) { 373 return -EINVAL; 374 } 375 376 if (decoder->input != *iarg) { 377 decoder->input = *iarg; 378 /* select mode */ 379 saa7111_write(client, 0x02, 380 (decoder-> 381 reg[0x02] & 0xf8) | decoder->input); 382 /* bypass chrominance trap for modes 4..7 */ 383 saa7111_write(client, 0x09, 384 (decoder-> 385 reg[0x09] & 0x7f) | ((decoder-> 386 input > 387 3) ? 0x80 : 388 0)); 389 } 390 } 391 break; 392 393 case DECODER_SET_OUTPUT: 394 { 395 int *iarg = arg; 396 397 /* not much choice of outputs */ 398 if (*iarg != 0) { 399 return -EINVAL; 400 } 401 } 402 break; 403 404 case DECODER_ENABLE_OUTPUT: 405 { 406 int *iarg = arg; 407 int enable = (*iarg != 0); 408 409 if (decoder->enable != enable) { 410 decoder->enable = enable; 411 412 /* RJ: If output should be disabled (for 413 * playing videos), we also need a open PLL. 414 * The input is set to 0 (where no input 415 * source is connected), although this 416 * is not necessary. 417 * 418 * If output should be enabled, we have to 419 * reverse the above. 420 */ 421 422 if (decoder->enable) { 423 saa7111_write(client, 0x02, 424 (decoder-> 425 reg[0x02] & 0xf8) | 426 decoder->input); 427 saa7111_write(client, 0x08, 428 (decoder->reg[0x08] & 0xfb)); 429 saa7111_write(client, 0x11, 430 (decoder-> 431 reg[0x11] & 0xf3) | 0x0c); 432 } else { 433 saa7111_write(client, 0x02, 434 (decoder->reg[0x02] & 0xf8)); 435 saa7111_write(client, 0x08, 436 (decoder-> 437 reg[0x08] & 0xfb) | 0x04); 438 saa7111_write(client, 0x11, 439 (decoder->reg[0x11] & 0xf3)); 440 } 441 } 442 } 443 break; 444 445 case DECODER_SET_PICTURE: 446 { 447 struct video_picture *pic = arg; 448 449 /* We want 0 to 255 we get 0-65535 */ 450 saa7111_write_if_changed(client, 0x0a, pic->brightness >> 8); 451 /* We want 0 to 127 we get 0-65535 */ 452 saa7111_write(client, 0x0b, pic->contrast >> 9); 453 /* We want 0 to 127 we get 0-65535 */ 454 saa7111_write(client, 0x0c, pic->colour >> 9); 455 /* We want -128 to 127 we get 0-65535 */ 456 saa7111_write(client, 0x0d, (pic->hue - 32768) >> 8); 457 } 458 break; 459 460 default: 461 return -EINVAL; 462 } 463 464 return 0; 465} 466 467/* ----------------------------------------------------------------------- */ 468 469/* 470 * Generic i2c probe 471 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 472 */ 473static unsigned short normal_i2c[] = { I2C_SAA7111 >> 1, I2C_CLIENT_END }; 474 475static unsigned short ignore = I2C_CLIENT_END; 476 477static struct i2c_client_address_data addr_data = { 478 .normal_i2c = normal_i2c, 479 .probe = &ignore, 480 .ignore = &ignore, 481}; 482 483static struct i2c_driver i2c_driver_saa7111; 484 485static int 486saa7111_detect_client (struct i2c_adapter *adapter, 487 int address, 488 int kind) 489{ 490 int i; 491 struct i2c_client *client; 492 struct saa7111 *decoder; 493 struct video_decoder_init vdi; 494 495 dprintk(1, 496 KERN_INFO 497 "saa7111.c: detecting saa7111 client on address 0x%x\n", 498 address << 1); 499 500 /* Check if the adapter supports the needed features */ 501 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 502 return 0; 503 504 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); 505 if (client == 0) 506 return -ENOMEM; 507 client->addr = address; 508 client->adapter = adapter; 509 client->driver = &i2c_driver_saa7111; 510 strlcpy(I2C_NAME(client), "saa7111", sizeof(I2C_NAME(client))); 511 512 decoder = kzalloc(sizeof(struct saa7111), GFP_KERNEL); 513 if (decoder == NULL) { 514 kfree(client); 515 return -ENOMEM; 516 } 517 decoder->norm = VIDEO_MODE_NTSC; 518 decoder->input = 0; 519 decoder->enable = 1; 520 i2c_set_clientdata(client, decoder); 521 522 i = i2c_attach_client(client); 523 if (i) { 524 kfree(client); 525 kfree(decoder); 526 return i; 527 } 528 529 vdi.data = saa7111_i2c_init; 530 vdi.len = sizeof(saa7111_i2c_init); 531 i = saa7111_init_decoder(client, &vdi); 532 if (i < 0) { 533 dprintk(1, KERN_ERR "%s_attach error: init status %d\n", 534 I2C_NAME(client), i); 535 } else { 536 dprintk(1, 537 KERN_INFO 538 "%s_attach: chip version %x at address 0x%x\n", 539 I2C_NAME(client), saa7111_read(client, 0x00) >> 4, 540 client->addr << 1); 541 } 542 543 return 0; 544} 545 546static int 547saa7111_attach_adapter (struct i2c_adapter *adapter) 548{ 549 dprintk(1, 550 KERN_INFO 551 "saa7111.c: starting probe for adapter %s (0x%x)\n", 552 I2C_NAME(adapter), adapter->id); 553 return i2c_probe(adapter, &addr_data, &saa7111_detect_client); 554} 555 556static int 557saa7111_detach_client (struct i2c_client *client) 558{ 559 struct saa7111 *decoder = i2c_get_clientdata(client); 560 int err; 561 562 err = i2c_detach_client(client); 563 if (err) { 564 return err; 565 } 566 567 kfree(decoder); 568 kfree(client); 569 570 return 0; 571} 572 573/* ----------------------------------------------------------------------- */ 574 575static struct i2c_driver i2c_driver_saa7111 = { 576 .driver = { 577 .name = "saa7111", 578 }, 579 580 .id = I2C_DRIVERID_SAA7111A, 581 582 .attach_adapter = saa7111_attach_adapter, 583 .detach_client = saa7111_detach_client, 584 .command = saa7111_command, 585}; 586 587static int __init 588saa7111_init (void) 589{ 590 return i2c_add_driver(&i2c_driver_saa7111); 591} 592 593static void __exit 594saa7111_exit (void) 595{ 596 i2c_del_driver(&i2c_driver_saa7111); 597} 598 599module_init(saa7111_init); 600module_exit(saa7111_exit); 601