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 #include <media/v4l2-chip-ident.h> 36 37 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver"); 38 MODULE_AUTHOR("Dave Perks"); 39 MODULE_LICENSE("GPL"); 40 41 #define I2C_ADV7175 0xd4 42 #define I2C_ADV7176 0x54 43 44 45 static int debug; 46 module_param(debug, int, 0); 47 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 48 49 /* ----------------------------------------------------------------------- */ 50 51 struct adv7175 { 52 struct v4l2_subdev sd; 53 v4l2_std_id norm; 54 int input; 55 }; 56 57 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd) 58 { 59 return container_of(sd, struct adv7175, sd); 60 } 61 62 static char *inputs[] = { "pass_through", "play_back", "color_bar" }; 63 64 static enum v4l2_mbus_pixelcode adv7175_codes[] = { 65 V4L2_MBUS_FMT_UYVY8_2X8, 66 V4L2_MBUS_FMT_UYVY8_1X16, 67 }; 68 69 /* ----------------------------------------------------------------------- */ 70 71 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value) 72 { 73 struct i2c_client *client = v4l2_get_subdevdata(sd); 74 75 return i2c_smbus_write_byte_data(client, reg, value); 76 } 77 78 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg) 79 { 80 struct i2c_client *client = v4l2_get_subdevdata(sd); 81 82 return i2c_smbus_read_byte_data(client, reg); 83 } 84 85 static int adv7175_write_block(struct v4l2_subdev *sd, 86 const u8 *data, unsigned int len) 87 { 88 struct i2c_client *client = v4l2_get_subdevdata(sd); 89 int ret = -1; 90 u8 reg; 91 92 /* the adv7175 has an autoincrement function, use it if 93 * the adapter understands raw I2C */ 94 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 95 /* do raw I2C, not smbus compatible */ 96 u8 block_data[32]; 97 int block_len; 98 99 while (len >= 2) { 100 block_len = 0; 101 block_data[block_len++] = reg = data[0]; 102 do { 103 block_data[block_len++] = data[1]; 104 reg++; 105 len -= 2; 106 data += 2; 107 } while (len >= 2 && data[0] == reg && block_len < 32); 108 ret = i2c_master_send(client, block_data, block_len); 109 if (ret < 0) 110 break; 111 } 112 } else { 113 /* do some slow I2C emulation kind of thing */ 114 while (len >= 2) { 115 reg = *data++; 116 ret = adv7175_write(sd, reg, *data++); 117 if (ret < 0) 118 break; 119 len -= 2; 120 } 121 } 122 123 return ret; 124 } 125 126 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through) 127 { 128 /* for some reason pass_through NTSC needs 129 * a different sub-carrier freq to remain stable. */ 130 if (pass_through) 131 adv7175_write(sd, 0x02, 0x00); 132 else 133 adv7175_write(sd, 0x02, 0x55); 134 135 adv7175_write(sd, 0x03, 0x55); 136 adv7175_write(sd, 0x04, 0x55); 137 adv7175_write(sd, 0x05, 0x25); 138 } 139 140 /* ----------------------------------------------------------------------- */ 141 /* Output filter: S-Video Composite */ 142 143 #define MR050 0x11 /* 0x09 */ 144 #define MR060 0x14 /* 0x0c */ 145 146 /* ----------------------------------------------------------------------- */ 147 148 #define TR0MODE 0x46 149 #define TR0RST 0x80 150 151 #define TR1CAPT 0x80 152 #define TR1PLAY 0x00 153 154 static const unsigned char init_common[] = { 155 156 0x00, MR050, /* MR0, PAL enabled */ 157 0x01, 0x00, /* MR1 */ 158 0x02, 0x0c, /* subc. freq. */ 159 0x03, 0x8c, /* subc. freq. */ 160 0x04, 0x79, /* subc. freq. */ 161 0x05, 0x26, /* subc. freq. */ 162 0x06, 0x40, /* subc. phase */ 163 164 0x07, TR0MODE, /* TR0, 16bit */ 165 0x08, 0x21, /* */ 166 0x09, 0x00, /* */ 167 0x0a, 0x00, /* */ 168 0x0b, 0x00, /* */ 169 0x0c, TR1CAPT, /* TR1 */ 170 0x0d, 0x4f, /* MR2 */ 171 0x0e, 0x00, /* */ 172 0x0f, 0x00, /* */ 173 0x10, 0x00, /* */ 174 0x11, 0x00, /* */ 175 }; 176 177 static const unsigned char init_pal[] = { 178 0x00, MR050, /* MR0, PAL enabled */ 179 0x01, 0x00, /* MR1 */ 180 0x02, 0x0c, /* subc. freq. */ 181 0x03, 0x8c, /* subc. freq. */ 182 0x04, 0x79, /* subc. freq. */ 183 0x05, 0x26, /* subc. freq. */ 184 0x06, 0x40, /* subc. phase */ 185 }; 186 187 static const unsigned char init_ntsc[] = { 188 0x00, MR060, /* MR0, NTSC enabled */ 189 0x01, 0x00, /* MR1 */ 190 0x02, 0x55, /* subc. freq. */ 191 0x03, 0x55, /* subc. freq. */ 192 0x04, 0x55, /* subc. freq. */ 193 0x05, 0x25, /* subc. freq. */ 194 0x06, 0x1a, /* subc. phase */ 195 }; 196 197 static int adv7175_init(struct v4l2_subdev *sd, u32 val) 198 { 199 /* This is just for testing!!! */ 200 adv7175_write_block(sd, init_common, sizeof(init_common)); 201 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 202 adv7175_write(sd, 0x07, TR0MODE); 203 return 0; 204 } 205 206 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) 207 { 208 struct adv7175 *encoder = to_adv7175(sd); 209 210 if (std & V4L2_STD_NTSC) { 211 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc)); 212 if (encoder->input == 0) 213 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 214 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 215 adv7175_write(sd, 0x07, TR0MODE); 216 } else if (std & V4L2_STD_PAL) { 217 adv7175_write_block(sd, init_pal, sizeof(init_pal)); 218 if (encoder->input == 0) 219 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 220 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 221 adv7175_write(sd, 0x07, TR0MODE); 222 } else if (std & V4L2_STD_SECAM) { 223 /* This is an attempt to convert 224 * SECAM->PAL (typically it does not work 225 * due to genlock: when decoder is in SECAM 226 * and encoder in in PAL the subcarrier can 227 * not be syncronized with horizontal 228 * quency) */ 229 adv7175_write_block(sd, init_pal, sizeof(init_pal)); 230 if (encoder->input == 0) 231 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ 232 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 233 adv7175_write(sd, 0x07, TR0MODE); 234 } else { 235 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n", 236 (unsigned long long)std); 237 return -EINVAL; 238 } 239 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std); 240 encoder->norm = std; 241 return 0; 242 } 243 244 static int adv7175_s_routing(struct v4l2_subdev *sd, 245 u32 input, u32 output, u32 config) 246 { 247 struct adv7175 *encoder = to_adv7175(sd); 248 249 /* RJ: input = 0: input is from decoder 250 input = 1: input is from ZR36060 251 input = 2: color bar */ 252 253 switch (input) { 254 case 0: 255 adv7175_write(sd, 0x01, 0x00); 256 257 if (encoder->norm & V4L2_STD_NTSC) 258 set_subcarrier_freq(sd, 1); 259 260 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */ 261 if (encoder->norm & V4L2_STD_SECAM) 262 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ 263 else 264 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 265 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 266 adv7175_write(sd, 0x07, TR0MODE); 267 /*udelay(10);*/ 268 break; 269 270 case 1: 271 adv7175_write(sd, 0x01, 0x00); 272 273 if (encoder->norm & V4L2_STD_NTSC) 274 set_subcarrier_freq(sd, 0); 275 276 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */ 277 adv7175_write(sd, 0x0d, 0x49); 278 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 279 adv7175_write(sd, 0x07, TR0MODE); 280 /* udelay(10); */ 281 break; 282 283 case 2: 284 adv7175_write(sd, 0x01, 0x80); 285 286 if (encoder->norm & V4L2_STD_NTSC) 287 set_subcarrier_freq(sd, 0); 288 289 adv7175_write(sd, 0x0d, 0x49); 290 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 291 adv7175_write(sd, 0x07, TR0MODE); 292 /* udelay(10); */ 293 break; 294 295 default: 296 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input); 297 return -EINVAL; 298 } 299 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]); 300 encoder->input = input; 301 return 0; 302 } 303 304 static int adv7175_enum_fmt(struct v4l2_subdev *sd, unsigned int index, 305 enum v4l2_mbus_pixelcode *code) 306 { 307 if (index >= ARRAY_SIZE(adv7175_codes)) 308 return -EINVAL; 309 310 *code = adv7175_codes[index]; 311 return 0; 312 } 313 314 static int adv7175_g_fmt(struct v4l2_subdev *sd, 315 struct v4l2_mbus_framefmt *mf) 316 { 317 u8 val = adv7175_read(sd, 0x7); 318 319 if ((val & 0x40) == (1 << 6)) 320 mf->code = V4L2_MBUS_FMT_UYVY8_1X16; 321 else 322 mf->code = V4L2_MBUS_FMT_UYVY8_2X8; 323 324 mf->colorspace = V4L2_COLORSPACE_SMPTE170M; 325 mf->width = 0; 326 mf->height = 0; 327 mf->field = V4L2_FIELD_ANY; 328 329 return 0; 330 } 331 332 static int adv7175_s_fmt(struct v4l2_subdev *sd, 333 struct v4l2_mbus_framefmt *mf) 334 { 335 u8 val = adv7175_read(sd, 0x7); 336 int ret; 337 338 switch (mf->code) { 339 case V4L2_MBUS_FMT_UYVY8_2X8: 340 val &= ~0x40; 341 break; 342 343 case V4L2_MBUS_FMT_UYVY8_1X16: 344 val |= 0x40; 345 break; 346 347 default: 348 v4l2_dbg(1, debug, sd, 349 "illegal v4l2_mbus_framefmt code: %d\n", mf->code); 350 return -EINVAL; 351 } 352 353 ret = adv7175_write(sd, 0x7, val); 354 355 return ret; 356 } 357 358 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) 359 { 360 struct i2c_client *client = v4l2_get_subdevdata(sd); 361 362 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0); 363 } 364 365 static int adv7175_s_power(struct v4l2_subdev *sd, int on) 366 { 367 if (on) 368 adv7175_write(sd, 0x01, 0x00); 369 else 370 adv7175_write(sd, 0x01, 0x78); 371 372 return 0; 373 } 374 375 /* ----------------------------------------------------------------------- */ 376 377 static const struct v4l2_subdev_core_ops adv7175_core_ops = { 378 .g_chip_ident = adv7175_g_chip_ident, 379 .init = adv7175_init, 380 .s_power = adv7175_s_power, 381 }; 382 383 static const struct v4l2_subdev_video_ops adv7175_video_ops = { 384 .s_std_output = adv7175_s_std_output, 385 .s_routing = adv7175_s_routing, 386 .s_mbus_fmt = adv7175_s_fmt, 387 .g_mbus_fmt = adv7175_g_fmt, 388 .enum_mbus_fmt = adv7175_enum_fmt, 389 }; 390 391 static const struct v4l2_subdev_ops adv7175_ops = { 392 .core = &adv7175_core_ops, 393 .video = &adv7175_video_ops, 394 }; 395 396 /* ----------------------------------------------------------------------- */ 397 398 static int adv7175_probe(struct i2c_client *client, 399 const struct i2c_device_id *id) 400 { 401 int i; 402 struct adv7175 *encoder; 403 struct v4l2_subdev *sd; 404 405 /* Check if the adapter supports the needed features */ 406 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 407 return -ENODEV; 408 409 v4l_info(client, "chip found @ 0x%x (%s)\n", 410 client->addr << 1, client->adapter->name); 411 412 encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL); 413 if (encoder == NULL) 414 return -ENOMEM; 415 sd = &encoder->sd; 416 v4l2_i2c_subdev_init(sd, client, &adv7175_ops); 417 encoder->norm = V4L2_STD_NTSC; 418 encoder->input = 0; 419 420 i = adv7175_write_block(sd, init_common, sizeof(init_common)); 421 if (i >= 0) { 422 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST); 423 i = adv7175_write(sd, 0x07, TR0MODE); 424 i = adv7175_read(sd, 0x12); 425 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1); 426 } 427 if (i < 0) 428 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i); 429 return 0; 430 } 431 432 static int adv7175_remove(struct i2c_client *client) 433 { 434 struct v4l2_subdev *sd = i2c_get_clientdata(client); 435 436 v4l2_device_unregister_subdev(sd); 437 kfree(to_adv7175(sd)); 438 return 0; 439 } 440 441 /* ----------------------------------------------------------------------- */ 442 443 static const struct i2c_device_id adv7175_id[] = { 444 { "adv7175", 0 }, 445 { "adv7176", 0 }, 446 { } 447 }; 448 MODULE_DEVICE_TABLE(i2c, adv7175_id); 449 450 static struct i2c_driver adv7175_driver = { 451 .driver = { 452 .owner = THIS_MODULE, 453 .name = "adv7175", 454 }, 455 .probe = adv7175_probe, 456 .remove = adv7175_remove, 457 .id_table = adv7175_id, 458 }; 459 460 module_i2c_driver(adv7175_driver); 461