1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * adv7175 - adv7175a video encoder driver version 0.0.3 4 * 5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net> 6 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net> 7 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> 8 * - some corrections for Pinnacle Systems Inc. DC10plus card. 9 * 10 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> 11 * - moved over to linux>=2.4.x i2c protocol (9/9/2002) 12 */ 13 14 #include <linux/module.h> 15 #include <linux/types.h> 16 #include <linux/slab.h> 17 #include <linux/ioctl.h> 18 #include <linux/uaccess.h> 19 #include <linux/i2c.h> 20 #include <linux/videodev2.h> 21 #include <media/v4l2-device.h> 22 23 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver"); 24 MODULE_AUTHOR("Dave Perks"); 25 MODULE_LICENSE("GPL"); 26 27 #define I2C_ADV7175 0xd4 28 #define I2C_ADV7176 0x54 29 30 31 static int debug; 32 module_param(debug, int, 0); 33 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 34 35 /* ----------------------------------------------------------------------- */ 36 37 struct adv7175 { 38 struct v4l2_subdev sd; 39 v4l2_std_id norm; 40 int input; 41 }; 42 43 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd) 44 { 45 return container_of(sd, struct adv7175, sd); 46 } 47 48 static char *inputs[] = { "pass_through", "play_back", "color_bar" }; 49 50 static u32 adv7175_codes[] = { 51 MEDIA_BUS_FMT_UYVY8_2X8, 52 MEDIA_BUS_FMT_UYVY8_1X16, 53 }; 54 55 /* ----------------------------------------------------------------------- */ 56 57 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value) 58 { 59 struct i2c_client *client = v4l2_get_subdevdata(sd); 60 61 return i2c_smbus_write_byte_data(client, reg, value); 62 } 63 64 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg) 65 { 66 struct i2c_client *client = v4l2_get_subdevdata(sd); 67 68 return i2c_smbus_read_byte_data(client, reg); 69 } 70 71 static int adv7175_write_block(struct v4l2_subdev *sd, 72 const u8 *data, unsigned int len) 73 { 74 struct i2c_client *client = v4l2_get_subdevdata(sd); 75 int ret = -1; 76 u8 reg; 77 78 /* the adv7175 has an autoincrement function, use it if 79 * the adapter understands raw I2C */ 80 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 81 /* do raw I2C, not smbus compatible */ 82 u8 block_data[32]; 83 int block_len; 84 85 while (len >= 2) { 86 block_len = 0; 87 block_data[block_len++] = reg = data[0]; 88 do { 89 block_data[block_len++] = data[1]; 90 reg++; 91 len -= 2; 92 data += 2; 93 } while (len >= 2 && data[0] == reg && block_len < 32); 94 ret = i2c_master_send(client, block_data, block_len); 95 if (ret < 0) 96 break; 97 } 98 } else { 99 /* do some slow I2C emulation kind of thing */ 100 while (len >= 2) { 101 reg = *data++; 102 ret = adv7175_write(sd, reg, *data++); 103 if (ret < 0) 104 break; 105 len -= 2; 106 } 107 } 108 109 return ret; 110 } 111 112 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through) 113 { 114 /* for some reason pass_through NTSC needs 115 * a different sub-carrier freq to remain stable. */ 116 if (pass_through) 117 adv7175_write(sd, 0x02, 0x00); 118 else 119 adv7175_write(sd, 0x02, 0x55); 120 121 adv7175_write(sd, 0x03, 0x55); 122 adv7175_write(sd, 0x04, 0x55); 123 adv7175_write(sd, 0x05, 0x25); 124 } 125 126 /* ----------------------------------------------------------------------- */ 127 /* Output filter: S-Video Composite */ 128 129 #define MR050 0x11 /* 0x09 */ 130 #define MR060 0x14 /* 0x0c */ 131 132 /* ----------------------------------------------------------------------- */ 133 134 #define TR0MODE 0x46 135 #define TR0RST 0x80 136 137 #define TR1CAPT 0x80 138 #define TR1PLAY 0x00 139 140 static const unsigned char init_common[] = { 141 142 0x00, MR050, /* MR0, PAL enabled */ 143 0x01, 0x00, /* MR1 */ 144 0x02, 0x0c, /* subc. freq. */ 145 0x03, 0x8c, /* subc. freq. */ 146 0x04, 0x79, /* subc. freq. */ 147 0x05, 0x26, /* subc. freq. */ 148 0x06, 0x40, /* subc. phase */ 149 150 0x07, TR0MODE, /* TR0, 16bit */ 151 0x08, 0x21, /* */ 152 0x09, 0x00, /* */ 153 0x0a, 0x00, /* */ 154 0x0b, 0x00, /* */ 155 0x0c, TR1CAPT, /* TR1 */ 156 0x0d, 0x4f, /* MR2 */ 157 0x0e, 0x00, /* */ 158 0x0f, 0x00, /* */ 159 0x10, 0x00, /* */ 160 0x11, 0x00, /* */ 161 }; 162 163 static const unsigned char init_pal[] = { 164 0x00, MR050, /* MR0, PAL enabled */ 165 0x01, 0x00, /* MR1 */ 166 0x02, 0x0c, /* subc. freq. */ 167 0x03, 0x8c, /* subc. freq. */ 168 0x04, 0x79, /* subc. freq. */ 169 0x05, 0x26, /* subc. freq. */ 170 0x06, 0x40, /* subc. phase */ 171 }; 172 173 static const unsigned char init_ntsc[] = { 174 0x00, MR060, /* MR0, NTSC enabled */ 175 0x01, 0x00, /* MR1 */ 176 0x02, 0x55, /* subc. freq. */ 177 0x03, 0x55, /* subc. freq. */ 178 0x04, 0x55, /* subc. freq. */ 179 0x05, 0x25, /* subc. freq. */ 180 0x06, 0x1a, /* subc. phase */ 181 }; 182 183 static int adv7175_init(struct v4l2_subdev *sd, u32 val) 184 { 185 /* This is just for testing!!! */ 186 adv7175_write_block(sd, init_common, sizeof(init_common)); 187 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 188 adv7175_write(sd, 0x07, TR0MODE); 189 return 0; 190 } 191 192 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) 193 { 194 struct adv7175 *encoder = to_adv7175(sd); 195 196 if (std & V4L2_STD_NTSC) { 197 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc)); 198 if (encoder->input == 0) 199 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 200 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 201 adv7175_write(sd, 0x07, TR0MODE); 202 } else if (std & V4L2_STD_PAL) { 203 adv7175_write_block(sd, init_pal, sizeof(init_pal)); 204 if (encoder->input == 0) 205 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 206 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 207 adv7175_write(sd, 0x07, TR0MODE); 208 } else if (std & V4L2_STD_SECAM) { 209 /* This is an attempt to convert 210 * SECAM->PAL (typically it does not work 211 * due to genlock: when decoder is in SECAM 212 * and encoder in in PAL the subcarrier can 213 * not be synchronized with horizontal 214 * quency) */ 215 adv7175_write_block(sd, init_pal, sizeof(init_pal)); 216 if (encoder->input == 0) 217 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ 218 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 219 adv7175_write(sd, 0x07, TR0MODE); 220 } else { 221 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n", 222 (unsigned long long)std); 223 return -EINVAL; 224 } 225 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std); 226 encoder->norm = std; 227 return 0; 228 } 229 230 static int adv7175_s_routing(struct v4l2_subdev *sd, 231 u32 input, u32 output, u32 config) 232 { 233 struct adv7175 *encoder = to_adv7175(sd); 234 235 /* RJ: input = 0: input is from decoder 236 input = 1: input is from ZR36060 237 input = 2: color bar */ 238 239 switch (input) { 240 case 0: 241 adv7175_write(sd, 0x01, 0x00); 242 243 if (encoder->norm & V4L2_STD_NTSC) 244 set_subcarrier_freq(sd, 1); 245 246 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */ 247 if (encoder->norm & V4L2_STD_SECAM) 248 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */ 249 else 250 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */ 251 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 252 adv7175_write(sd, 0x07, TR0MODE); 253 /*udelay(10);*/ 254 break; 255 256 case 1: 257 adv7175_write(sd, 0x01, 0x00); 258 259 if (encoder->norm & V4L2_STD_NTSC) 260 set_subcarrier_freq(sd, 0); 261 262 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */ 263 adv7175_write(sd, 0x0d, 0x49); 264 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 265 adv7175_write(sd, 0x07, TR0MODE); 266 /* udelay(10); */ 267 break; 268 269 case 2: 270 adv7175_write(sd, 0x01, 0x80); 271 272 if (encoder->norm & V4L2_STD_NTSC) 273 set_subcarrier_freq(sd, 0); 274 275 adv7175_write(sd, 0x0d, 0x49); 276 adv7175_write(sd, 0x07, TR0MODE | TR0RST); 277 adv7175_write(sd, 0x07, TR0MODE); 278 /* udelay(10); */ 279 break; 280 281 default: 282 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input); 283 return -EINVAL; 284 } 285 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]); 286 encoder->input = input; 287 return 0; 288 } 289 290 static int adv7175_enum_mbus_code(struct v4l2_subdev *sd, 291 struct v4l2_subdev_state *sd_state, 292 struct v4l2_subdev_mbus_code_enum *code) 293 { 294 if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes)) 295 return -EINVAL; 296 297 code->code = adv7175_codes[code->index]; 298 return 0; 299 } 300 301 static int adv7175_get_fmt(struct v4l2_subdev *sd, 302 struct v4l2_subdev_state *sd_state, 303 struct v4l2_subdev_format *format) 304 { 305 struct v4l2_mbus_framefmt *mf = &format->format; 306 u8 val = adv7175_read(sd, 0x7); 307 308 if (format->pad) 309 return -EINVAL; 310 311 if ((val & 0x40) == (1 << 6)) 312 mf->code = MEDIA_BUS_FMT_UYVY8_1X16; 313 else 314 mf->code = MEDIA_BUS_FMT_UYVY8_2X8; 315 316 mf->colorspace = V4L2_COLORSPACE_SMPTE170M; 317 mf->width = 0; 318 mf->height = 0; 319 mf->field = V4L2_FIELD_ANY; 320 321 return 0; 322 } 323 324 static int adv7175_set_fmt(struct v4l2_subdev *sd, 325 struct v4l2_subdev_state *sd_state, 326 struct v4l2_subdev_format *format) 327 { 328 struct v4l2_mbus_framefmt *mf = &format->format; 329 u8 val = adv7175_read(sd, 0x7); 330 int ret = 0; 331 332 if (format->pad) 333 return -EINVAL; 334 335 switch (mf->code) { 336 case MEDIA_BUS_FMT_UYVY8_2X8: 337 val &= ~0x40; 338 break; 339 340 case MEDIA_BUS_FMT_UYVY8_1X16: 341 val |= 0x40; 342 break; 343 344 default: 345 v4l2_dbg(1, debug, sd, 346 "illegal v4l2_mbus_framefmt code: %d\n", mf->code); 347 return -EINVAL; 348 } 349 350 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) 351 ret = adv7175_write(sd, 0x7, val); 352 353 return ret; 354 } 355 356 static int adv7175_s_power(struct v4l2_subdev *sd, int on) 357 { 358 if (on) 359 adv7175_write(sd, 0x01, 0x00); 360 else 361 adv7175_write(sd, 0x01, 0x78); 362 363 return 0; 364 } 365 366 /* ----------------------------------------------------------------------- */ 367 368 static const struct v4l2_subdev_core_ops adv7175_core_ops = { 369 .init = adv7175_init, 370 .s_power = adv7175_s_power, 371 }; 372 373 static const struct v4l2_subdev_video_ops adv7175_video_ops = { 374 .s_std_output = adv7175_s_std_output, 375 .s_routing = adv7175_s_routing, 376 }; 377 378 static const struct v4l2_subdev_pad_ops adv7175_pad_ops = { 379 .enum_mbus_code = adv7175_enum_mbus_code, 380 .get_fmt = adv7175_get_fmt, 381 .set_fmt = adv7175_set_fmt, 382 }; 383 384 static const struct v4l2_subdev_ops adv7175_ops = { 385 .core = &adv7175_core_ops, 386 .video = &adv7175_video_ops, 387 .pad = &adv7175_pad_ops, 388 }; 389 390 /* ----------------------------------------------------------------------- */ 391 392 static int adv7175_probe(struct i2c_client *client, 393 const struct i2c_device_id *id) 394 { 395 int i; 396 struct adv7175 *encoder; 397 struct v4l2_subdev *sd; 398 399 /* Check if the adapter supports the needed features */ 400 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 401 return -ENODEV; 402 403 v4l_info(client, "chip found @ 0x%x (%s)\n", 404 client->addr << 1, client->adapter->name); 405 406 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); 407 if (encoder == NULL) 408 return -ENOMEM; 409 sd = &encoder->sd; 410 v4l2_i2c_subdev_init(sd, client, &adv7175_ops); 411 encoder->norm = V4L2_STD_NTSC; 412 encoder->input = 0; 413 414 i = adv7175_write_block(sd, init_common, sizeof(init_common)); 415 if (i >= 0) { 416 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST); 417 i = adv7175_write(sd, 0x07, TR0MODE); 418 i = adv7175_read(sd, 0x12); 419 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1); 420 } 421 if (i < 0) 422 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i); 423 return 0; 424 } 425 426 static void adv7175_remove(struct i2c_client *client) 427 { 428 struct v4l2_subdev *sd = i2c_get_clientdata(client); 429 430 v4l2_device_unregister_subdev(sd); 431 } 432 433 /* ----------------------------------------------------------------------- */ 434 435 static const struct i2c_device_id adv7175_id[] = { 436 { "adv7175", 0 }, 437 { "adv7176", 0 }, 438 { } 439 }; 440 MODULE_DEVICE_TABLE(i2c, adv7175_id); 441 442 static struct i2c_driver adv7175_driver = { 443 .driver = { 444 .name = "adv7175", 445 }, 446 .probe = adv7175_probe, 447 .remove = adv7175_remove, 448 .id_table = adv7175_id, 449 }; 450 451 module_i2c_driver(adv7175_driver); 452