1 /* 2 * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1 3 * 4 * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com> 5 * 6 * Based on adv7176 driver by: 7 * 8 * Copyright (C) 1998 Dave Perks <dperks@ibm.net> 9 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net> 10 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> 11 * - some corrections for Pinnacle Systems Inc. DC10plus card. 12 * 13 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> 14 * - moved over to linux>=2.4.x i2c protocol (1/1/2003) 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 29 */ 30 31 #include <linux/module.h> 32 #include <linux/types.h> 33 #include <linux/slab.h> 34 #include <linux/ioctl.h> 35 #include <asm/uaccess.h> 36 #include <linux/i2c.h> 37 #include <linux/videodev2.h> 38 #include <media/v4l2-device.h> 39 40 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver"); 41 MODULE_AUTHOR("Maxim Yevtyushkin"); 42 MODULE_LICENSE("GPL"); 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 adv7170 { 52 struct v4l2_subdev sd; 53 unsigned char reg[128]; 54 55 v4l2_std_id norm; 56 int input; 57 }; 58 59 static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd) 60 { 61 return container_of(sd, struct adv7170, sd); 62 } 63 64 static char *inputs[] = { "pass_through", "play_back" }; 65 66 static enum v4l2_mbus_pixelcode adv7170_codes[] = { 67 V4L2_MBUS_FMT_UYVY8_2X8, 68 V4L2_MBUS_FMT_UYVY8_1X16, 69 }; 70 71 /* ----------------------------------------------------------------------- */ 72 73 static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value) 74 { 75 struct i2c_client *client = v4l2_get_subdevdata(sd); 76 struct adv7170 *encoder = to_adv7170(sd); 77 78 encoder->reg[reg] = value; 79 return i2c_smbus_write_byte_data(client, reg, value); 80 } 81 82 static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg) 83 { 84 struct i2c_client *client = v4l2_get_subdevdata(sd); 85 86 return i2c_smbus_read_byte_data(client, reg); 87 } 88 89 static int adv7170_write_block(struct v4l2_subdev *sd, 90 const u8 *data, unsigned int len) 91 { 92 struct i2c_client *client = v4l2_get_subdevdata(sd); 93 struct adv7170 *encoder = to_adv7170(sd); 94 int ret = -1; 95 u8 reg; 96 97 /* the adv7170 has an autoincrement function, use it if 98 * the adapter understands raw I2C */ 99 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 100 /* do raw I2C, not smbus compatible */ 101 u8 block_data[32]; 102 int block_len; 103 104 while (len >= 2) { 105 block_len = 0; 106 block_data[block_len++] = reg = data[0]; 107 do { 108 block_data[block_len++] = 109 encoder->reg[reg++] = data[1]; 110 len -= 2; 111 data += 2; 112 } while (len >= 2 && data[0] == reg && block_len < 32); 113 ret = i2c_master_send(client, block_data, block_len); 114 if (ret < 0) 115 break; 116 } 117 } else { 118 /* do some slow I2C emulation kind of thing */ 119 while (len >= 2) { 120 reg = *data++; 121 ret = adv7170_write(sd, reg, *data++); 122 if (ret < 0) 123 break; 124 len -= 2; 125 } 126 } 127 return ret; 128 } 129 130 /* ----------------------------------------------------------------------- */ 131 132 #define TR0MODE 0x4c 133 #define TR0RST 0x80 134 135 #define TR1CAPT 0x00 136 #define TR1PLAY 0x00 137 138 static const unsigned char init_NTSC[] = { 139 0x00, 0x10, /* MR0 */ 140 0x01, 0x20, /* MR1 */ 141 0x02, 0x0e, /* MR2 RTC control: bits 2 and 1 */ 142 0x03, 0x80, /* MR3 */ 143 0x04, 0x30, /* MR4 */ 144 0x05, 0x00, /* Reserved */ 145 0x06, 0x00, /* Reserved */ 146 0x07, TR0MODE, /* TM0 */ 147 0x08, TR1CAPT, /* TM1 */ 148 0x09, 0x16, /* Fsc0 */ 149 0x0a, 0x7c, /* Fsc1 */ 150 0x0b, 0xf0, /* Fsc2 */ 151 0x0c, 0x21, /* Fsc3 */ 152 0x0d, 0x00, /* Subcarrier Phase */ 153 0x0e, 0x00, /* Closed Capt. Ext 0 */ 154 0x0f, 0x00, /* Closed Capt. Ext 1 */ 155 0x10, 0x00, /* Closed Capt. 0 */ 156 0x11, 0x00, /* Closed Capt. 1 */ 157 0x12, 0x00, /* Pedestal Ctl 0 */ 158 0x13, 0x00, /* Pedestal Ctl 1 */ 159 0x14, 0x00, /* Pedestal Ctl 2 */ 160 0x15, 0x00, /* Pedestal Ctl 3 */ 161 0x16, 0x00, /* CGMS_WSS_0 */ 162 0x17, 0x00, /* CGMS_WSS_1 */ 163 0x18, 0x00, /* CGMS_WSS_2 */ 164 0x19, 0x00, /* Teletext Ctl */ 165 }; 166 167 static const unsigned char init_PAL[] = { 168 0x00, 0x71, /* MR0 */ 169 0x01, 0x20, /* MR1 */ 170 0x02, 0x0e, /* MR2 RTC control: bits 2 and 1 */ 171 0x03, 0x80, /* MR3 */ 172 0x04, 0x30, /* MR4 */ 173 0x05, 0x00, /* Reserved */ 174 0x06, 0x00, /* Reserved */ 175 0x07, TR0MODE, /* TM0 */ 176 0x08, TR1CAPT, /* TM1 */ 177 0x09, 0xcb, /* Fsc0 */ 178 0x0a, 0x8a, /* Fsc1 */ 179 0x0b, 0x09, /* Fsc2 */ 180 0x0c, 0x2a, /* Fsc3 */ 181 0x0d, 0x00, /* Subcarrier Phase */ 182 0x0e, 0x00, /* Closed Capt. Ext 0 */ 183 0x0f, 0x00, /* Closed Capt. Ext 1 */ 184 0x10, 0x00, /* Closed Capt. 0 */ 185 0x11, 0x00, /* Closed Capt. 1 */ 186 0x12, 0x00, /* Pedestal Ctl 0 */ 187 0x13, 0x00, /* Pedestal Ctl 1 */ 188 0x14, 0x00, /* Pedestal Ctl 2 */ 189 0x15, 0x00, /* Pedestal Ctl 3 */ 190 0x16, 0x00, /* CGMS_WSS_0 */ 191 0x17, 0x00, /* CGMS_WSS_1 */ 192 0x18, 0x00, /* CGMS_WSS_2 */ 193 0x19, 0x00, /* Teletext Ctl */ 194 }; 195 196 197 static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) 198 { 199 struct adv7170 *encoder = to_adv7170(sd); 200 201 v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); 202 203 if (std & V4L2_STD_NTSC) { 204 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC)); 205 if (encoder->input == 0) 206 adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */ 207 adv7170_write(sd, 0x07, TR0MODE | TR0RST); 208 adv7170_write(sd, 0x07, TR0MODE); 209 } else if (std & V4L2_STD_PAL) { 210 adv7170_write_block(sd, init_PAL, sizeof(init_PAL)); 211 if (encoder->input == 0) 212 adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */ 213 adv7170_write(sd, 0x07, TR0MODE | TR0RST); 214 adv7170_write(sd, 0x07, TR0MODE); 215 } else { 216 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n", 217 (unsigned long long)std); 218 return -EINVAL; 219 } 220 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std); 221 encoder->norm = std; 222 return 0; 223 } 224 225 static int adv7170_s_routing(struct v4l2_subdev *sd, 226 u32 input, u32 output, u32 config) 227 { 228 struct adv7170 *encoder = to_adv7170(sd); 229 230 /* RJ: input = 0: input is from decoder 231 input = 1: input is from ZR36060 232 input = 2: color bar */ 233 234 v4l2_dbg(1, debug, sd, "set input from %s\n", 235 input == 0 ? "decoder" : "ZR36060"); 236 237 switch (input) { 238 case 0: 239 adv7170_write(sd, 0x01, 0x20); 240 adv7170_write(sd, 0x08, TR1CAPT); /* TR1 */ 241 adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */ 242 adv7170_write(sd, 0x07, TR0MODE | TR0RST); 243 adv7170_write(sd, 0x07, TR0MODE); 244 /* udelay(10); */ 245 break; 246 247 case 1: 248 adv7170_write(sd, 0x01, 0x00); 249 adv7170_write(sd, 0x08, TR1PLAY); /* TR1 */ 250 adv7170_write(sd, 0x02, 0x08); 251 adv7170_write(sd, 0x07, TR0MODE | TR0RST); 252 adv7170_write(sd, 0x07, TR0MODE); 253 /* udelay(10); */ 254 break; 255 256 default: 257 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input); 258 return -EINVAL; 259 } 260 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]); 261 encoder->input = input; 262 return 0; 263 } 264 265 static int adv7170_enum_fmt(struct v4l2_subdev *sd, unsigned int index, 266 enum v4l2_mbus_pixelcode *code) 267 { 268 if (index >= ARRAY_SIZE(adv7170_codes)) 269 return -EINVAL; 270 271 *code = adv7170_codes[index]; 272 return 0; 273 } 274 275 static int adv7170_g_fmt(struct v4l2_subdev *sd, 276 struct v4l2_mbus_framefmt *mf) 277 { 278 u8 val = adv7170_read(sd, 0x7); 279 280 if ((val & 0x40) == (1 << 6)) 281 mf->code = V4L2_MBUS_FMT_UYVY8_1X16; 282 else 283 mf->code = V4L2_MBUS_FMT_UYVY8_2X8; 284 285 mf->colorspace = V4L2_COLORSPACE_SMPTE170M; 286 mf->width = 0; 287 mf->height = 0; 288 mf->field = V4L2_FIELD_ANY; 289 290 return 0; 291 } 292 293 static int adv7170_s_fmt(struct v4l2_subdev *sd, 294 struct v4l2_mbus_framefmt *mf) 295 { 296 u8 val = adv7170_read(sd, 0x7); 297 int ret; 298 299 switch (mf->code) { 300 case V4L2_MBUS_FMT_UYVY8_2X8: 301 val &= ~0x40; 302 break; 303 304 case V4L2_MBUS_FMT_UYVY8_1X16: 305 val |= 0x40; 306 break; 307 308 default: 309 v4l2_dbg(1, debug, sd, 310 "illegal v4l2_mbus_framefmt code: %d\n", mf->code); 311 return -EINVAL; 312 } 313 314 ret = adv7170_write(sd, 0x7, val); 315 316 return ret; 317 } 318 319 /* ----------------------------------------------------------------------- */ 320 321 static const struct v4l2_subdev_video_ops adv7170_video_ops = { 322 .s_std_output = adv7170_s_std_output, 323 .s_routing = adv7170_s_routing, 324 .s_mbus_fmt = adv7170_s_fmt, 325 .g_mbus_fmt = adv7170_g_fmt, 326 .enum_mbus_fmt = adv7170_enum_fmt, 327 }; 328 329 static const struct v4l2_subdev_ops adv7170_ops = { 330 .video = &adv7170_video_ops, 331 }; 332 333 /* ----------------------------------------------------------------------- */ 334 335 static int adv7170_probe(struct i2c_client *client, 336 const struct i2c_device_id *id) 337 { 338 struct adv7170 *encoder; 339 struct v4l2_subdev *sd; 340 int i; 341 342 /* Check if the adapter supports the needed features */ 343 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 344 return -ENODEV; 345 346 v4l_info(client, "chip found @ 0x%x (%s)\n", 347 client->addr << 1, client->adapter->name); 348 349 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); 350 if (encoder == NULL) 351 return -ENOMEM; 352 sd = &encoder->sd; 353 v4l2_i2c_subdev_init(sd, client, &adv7170_ops); 354 encoder->norm = V4L2_STD_NTSC; 355 encoder->input = 0; 356 357 i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC)); 358 if (i >= 0) { 359 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST); 360 i = adv7170_write(sd, 0x07, TR0MODE); 361 i = adv7170_read(sd, 0x12); 362 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1); 363 } 364 if (i < 0) 365 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i); 366 return 0; 367 } 368 369 static int adv7170_remove(struct i2c_client *client) 370 { 371 struct v4l2_subdev *sd = i2c_get_clientdata(client); 372 373 v4l2_device_unregister_subdev(sd); 374 return 0; 375 } 376 377 /* ----------------------------------------------------------------------- */ 378 379 static const struct i2c_device_id adv7170_id[] = { 380 { "adv7170", 0 }, 381 { "adv7171", 0 }, 382 { } 383 }; 384 MODULE_DEVICE_TABLE(i2c, adv7170_id); 385 386 static struct i2c_driver adv7170_driver = { 387 .driver = { 388 .owner = THIS_MODULE, 389 .name = "adv7170", 390 }, 391 .probe = adv7170_probe, 392 .remove = adv7170_remove, 393 .id_table = adv7170_id, 394 }; 395 396 module_i2c_driver(adv7170_driver); 397