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