1 /* 2 * adv7175 - adv7175a video encoder driver version 0.0.3 3 * 4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net> 5 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net> 6 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> 7 * - some corrections for Pinnacle Systems Inc. DC10plus card. 8 * 9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> 10 * - moved over to linux>=2.4.x i2c protocol (9/9/2002) 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #include <linux/module.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/ioctl.h> 31 #include <asm/uaccess.h> 32 #include <linux/i2c.h> 33 #include <linux/videodev2.h> 34 #include <media/v4l2-device.h> 35 36 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver"); 37 MODULE_AUTHOR("Dave Perks"); 38 MODULE_LICENSE("GPL"); 39 40 #define I2C_ADV7175 0xd4 41 #define I2C_ADV7176 0x54 42 43 44 static int debug; 45 module_param(debug, int, 0); 46 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 47 48 /* ----------------------------------------------------------------------- */ 49 50 struct adv7175 { 51 struct v4l2_subdev sd; 52 v4l2_std_id norm; 53 int input; 54 }; 55 56 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd) 57 { 58 return container_of(sd, struct adv7175, sd); 59 } 60 61 static char *inputs[] = { "pass_through", "play_back", "color_bar" }; 62 63 static u32 adv7175_codes[] = { 64 MEDIA_BUS_FMT_UYVY8_2X8, 65 MEDIA_BUS_FMT_UYVY8_1X16, 66 }; 67 68 /* ----------------------------------------------------------------------- */ 69 70 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value) 71 { 72 struct i2c_client *client = v4l2_get_subdevdata(sd); 73 74 return i2c_smbus_write_byte_data(client, reg, value); 75 } 76 77 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg) 78 { 79 struct i2c_client *client = v4l2_get_subdevdata(sd); 80 81 return i2c_smbus_read_byte_data(client, reg); 82 } 83 84 static int adv7175_write_block(struct v4l2_subdev *sd, 85 const u8 *data, unsigned int len) 86 { 87 struct i2c_client *client = v4l2_get_subdevdata(sd); 88 int ret = -1; 89 u8 reg; 90 91 /* the adv7175 has an autoincrement function, use it if 92 * the adapter understands raw I2C */ 93 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 94 /* do raw I2C, not smbus compatible */ 95 u8 block_data[32]; 96 int block_len; 97 98 while (len >= 2) { 99 block_len = 0; 100 block_data[block_len++] = reg = data[0]; 101 do { 102 block_data[block_len++] = data[1]; 103 reg++; 104 len -= 2; 105 data += 2; 106 } while (len >= 2 && data[0] == reg && block_len < 32); 107 ret = i2c_master_send(client, block_data, block_len); 108 if (ret < 0) 109 break; 110 } 111 } else { 112 /* do some slow I2C emulation kind of thing */ 113 while (len >= 2) { 114 reg = *data++; 115 ret = adv7175_write(sd, reg, *data++); 116 if (ret < 0) 117 break; 118 len -= 2; 119 } 120 } 121 122 return ret; 123 } 124 125 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through) 126 { 127 /* for some reason pass_through NTSC needs 128 * a different sub-carrier freq to remain stable. */ 129 if (pass_through) 130 adv7175_write(sd, 0x02, 0x00); 131 else 132 adv7175_write(sd, 0x02, 0x55); 133 134 adv7175_write(sd, 0x03, 0x55); 135 adv7175_write(sd, 0x04, 0x55); 136 adv7175_write(sd, 0x05, 0x25); 137 } 138 139 /* ----------------------------------------------------------------------- */ 140 /* Output filter: S-Video Composite */ 141 142 #define MR050 0x11 /* 0x09 */ 143 #define MR060 0x14 /* 0x0c */ 144 145 /* ----------------------------------------------------------------------- */ 146 147 #define TR0MODE 0x46 148 #define TR0RST 0x80 149 150 #define TR1CAPT 0x80 151 #define TR1PLAY 0x00 152 153 static const unsigned char init_common[] = { 154 155 0x00, MR050, /* MR0, PAL enabled */ 156 0x01, 0x00, /* MR1 */ 157 0x02, 0x0c, /* subc. freq. */ 158 0x03, 0x8c, /* subc. freq. */ 159 0x04, 0x79, /* subc. freq. */ 160 0x05, 0x26, /* subc. freq. */ 161 0x06, 0x40, /* subc. phase */ 162 163 0x07, TR0MODE, /* TR0, 16bit */ 164 0x08, 0x21, /* */ 165 0x09, 0x00, /* */ 166 0x0a, 0x00, /* */ 167 0x0b, 0x00, /* */ 168 0x0c, TR1CAPT, /* TR1 */ 169 0x0d, 0x4f, /* MR2 */ 170 0x0e, 0x00, /* */ 171 0x0f, 0x00, /* */ 172 0x10, 0x00, /* */ 173 0x11, 0x00, /* */ 174 }; 175 176 static const unsigned char init_pal[] = { 177 0x00, MR050, /* MR0, PAL enabled */ 178 0x01, 0x00, /* MR1 */ 179 0x02, 0x0c, /* subc. freq. */ 180 0x03, 0x8c, /* subc. freq. */ 181 0x04, 0x79, /* subc. freq. */ 182 0x05, 0x26, /* subc. freq. */ 183 0x06, 0x40, /* subc. phase */ 184 }; 185 186 static const unsigned char init_ntsc[] = { 187 0x00, MR060, /* MR0, NTSC enabled */ 188 0x01, 0x00, /* MR1 */ 189 0x02, 0x55, /* subc. freq. */ 190 0x03, 0x55, /* subc. freq. */ 191 0x04, 0x55, /* subc. freq. */ 192 0x05, 0x25, /* subc. freq. */ 193 0x06, 0x1a, /* subc. phase */ 194 }; 195 196 static int adv7175_init(struct v4l2_subdev *sd, u32 val) 197 { 198 /* This is just for testing!!! */ 199 adv7175_write_block(sd, init_common, sizeof(init_common)); 200 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 201 adv7175_write(sd, 0x07, TR0MODE); 202 return 0; 203 } 204 205 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) 206 { 207 struct adv7175 *encoder = to_adv7175(sd); 208 209 if (std & V4L2_STD_NTSC) { 210 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc)); 211 if (encoder->input == 0) 212 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 213 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 214 adv7175_write(sd, 0x07, TR0MODE); 215 } else if (std & V4L2_STD_PAL) { 216 adv7175_write_block(sd, init_pal, sizeof(init_pal)); 217 if (encoder->input == 0) 218 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 219 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 220 adv7175_write(sd, 0x07, TR0MODE); 221 } else if (std & V4L2_STD_SECAM) { 222 /* This is an attempt to convert 223 * SECAM->PAL (typically it does not work 224 * due to genlock: when decoder is in SECAM 225 * and encoder in in PAL the subcarrier can 226 * not be syncronized with horizontal 227 * quency) */ 228 adv7175_write_block(sd, init_pal, sizeof(init_pal)); 229 if (encoder->input == 0) 230 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ 231 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 232 adv7175_write(sd, 0x07, TR0MODE); 233 } else { 234 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n", 235 (unsigned long long)std); 236 return -EINVAL; 237 } 238 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std); 239 encoder->norm = std; 240 return 0; 241 } 242 243 static int adv7175_s_routing(struct v4l2_subdev *sd, 244 u32 input, u32 output, u32 config) 245 { 246 struct adv7175 *encoder = to_adv7175(sd); 247 248 /* RJ: input = 0: input is from decoder 249 input = 1: input is from ZR36060 250 input = 2: color bar */ 251 252 switch (input) { 253 case 0: 254 adv7175_write(sd, 0x01, 0x00); 255 256 if (encoder->norm & V4L2_STD_NTSC) 257 set_subcarrier_freq(sd, 1); 258 259 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */ 260 if (encoder->norm & V4L2_STD_SECAM) 261 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ 262 else 263 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 264 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 265 adv7175_write(sd, 0x07, TR0MODE); 266 /*udelay(10);*/ 267 break; 268 269 case 1: 270 adv7175_write(sd, 0x01, 0x00); 271 272 if (encoder->norm & V4L2_STD_NTSC) 273 set_subcarrier_freq(sd, 0); 274 275 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */ 276 adv7175_write(sd, 0x0d, 0x49); 277 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 278 adv7175_write(sd, 0x07, TR0MODE); 279 /* udelay(10); */ 280 break; 281 282 case 2: 283 adv7175_write(sd, 0x01, 0x80); 284 285 if (encoder->norm & V4L2_STD_NTSC) 286 set_subcarrier_freq(sd, 0); 287 288 adv7175_write(sd, 0x0d, 0x49); 289 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 290 adv7175_write(sd, 0x07, TR0MODE); 291 /* udelay(10); */ 292 break; 293 294 default: 295 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input); 296 return -EINVAL; 297 } 298 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]); 299 encoder->input = input; 300 return 0; 301 } 302 303 static int adv7175_enum_mbus_code(struct v4l2_subdev *sd, 304 struct v4l2_subdev_pad_config *cfg, 305 struct v4l2_subdev_mbus_code_enum *code) 306 { 307 if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes)) 308 return -EINVAL; 309 310 code->code = adv7175_codes[code->index]; 311 return 0; 312 } 313 314 static int adv7175_get_fmt(struct v4l2_subdev *sd, 315 struct v4l2_subdev_pad_config *cfg, 316 struct v4l2_subdev_format *format) 317 { 318 struct v4l2_mbus_framefmt *mf = &format->format; 319 u8 val = adv7175_read(sd, 0x7); 320 321 if (format->pad) 322 return -EINVAL; 323 324 if ((val & 0x40) == (1 << 6)) 325 mf->code = MEDIA_BUS_FMT_UYVY8_1X16; 326 else 327 mf->code = MEDIA_BUS_FMT_UYVY8_2X8; 328 329 mf->colorspace = V4L2_COLORSPACE_SMPTE170M; 330 mf->width = 0; 331 mf->height = 0; 332 mf->field = V4L2_FIELD_ANY; 333 334 return 0; 335 } 336 337 static int adv7175_set_fmt(struct v4l2_subdev *sd, 338 struct v4l2_subdev_pad_config *cfg, 339 struct v4l2_subdev_format *format) 340 { 341 struct v4l2_mbus_framefmt *mf = &format->format; 342 u8 val = adv7175_read(sd, 0x7); 343 int ret = 0; 344 345 if (format->pad) 346 return -EINVAL; 347 348 switch (mf->code) { 349 case MEDIA_BUS_FMT_UYVY8_2X8: 350 val &= ~0x40; 351 break; 352 353 case MEDIA_BUS_FMT_UYVY8_1X16: 354 val |= 0x40; 355 break; 356 357 default: 358 v4l2_dbg(1, debug, sd, 359 "illegal v4l2_mbus_framefmt code: %d\n", mf->code); 360 return -EINVAL; 361 } 362 363 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) 364 ret = adv7175_write(sd, 0x7, val); 365 366 return ret; 367 } 368 369 static int adv7175_s_power(struct v4l2_subdev *sd, int on) 370 { 371 if (on) 372 adv7175_write(sd, 0x01, 0x00); 373 else 374 adv7175_write(sd, 0x01, 0x78); 375 376 return 0; 377 } 378 379 /* ----------------------------------------------------------------------- */ 380 381 static const struct v4l2_subdev_core_ops adv7175_core_ops = { 382 .init = adv7175_init, 383 .s_power = adv7175_s_power, 384 }; 385 386 static const struct v4l2_subdev_video_ops adv7175_video_ops = { 387 .s_std_output = adv7175_s_std_output, 388 .s_routing = adv7175_s_routing, 389 }; 390 391 static const struct v4l2_subdev_pad_ops adv7175_pad_ops = { 392 .enum_mbus_code = adv7175_enum_mbus_code, 393 .get_fmt = adv7175_get_fmt, 394 .set_fmt = adv7175_set_fmt, 395 }; 396 397 static const struct v4l2_subdev_ops adv7175_ops = { 398 .core = &adv7175_core_ops, 399 .video = &adv7175_video_ops, 400 .pad = &adv7175_pad_ops, 401 }; 402 403 /* ----------------------------------------------------------------------- */ 404 405 static int adv7175_probe(struct i2c_client *client, 406 const struct i2c_device_id *id) 407 { 408 int i; 409 struct adv7175 *encoder; 410 struct v4l2_subdev *sd; 411 412 /* Check if the adapter supports the needed features */ 413 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 414 return -ENODEV; 415 416 v4l_info(client, "chip found @ 0x%x (%s)\n", 417 client->addr << 1, client->adapter->name); 418 419 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); 420 if (encoder == NULL) 421 return -ENOMEM; 422 sd = &encoder->sd; 423 v4l2_i2c_subdev_init(sd, client, &adv7175_ops); 424 encoder->norm = V4L2_STD_NTSC; 425 encoder->input = 0; 426 427 i = adv7175_write_block(sd, init_common, sizeof(init_common)); 428 if (i >= 0) { 429 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST); 430 i = adv7175_write(sd, 0x07, TR0MODE); 431 i = adv7175_read(sd, 0x12); 432 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1); 433 } 434 if (i < 0) 435 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i); 436 return 0; 437 } 438 439 static int adv7175_remove(struct i2c_client *client) 440 { 441 struct v4l2_subdev *sd = i2c_get_clientdata(client); 442 443 v4l2_device_unregister_subdev(sd); 444 return 0; 445 } 446 447 /* ----------------------------------------------------------------------- */ 448 449 static const struct i2c_device_id adv7175_id[] = { 450 { "adv7175", 0 }, 451 { "adv7176", 0 }, 452 { } 453 }; 454 MODULE_DEVICE_TABLE(i2c, adv7175_id); 455 456 static struct i2c_driver adv7175_driver = { 457 .driver = { 458 .name = "adv7175", 459 }, 460 .probe = adv7175_probe, 461 .remove = adv7175_remove, 462 .id_table = adv7175_id, 463 }; 464 465 module_i2c_driver(adv7175_driver); 466