drivers/media/i2c/adv7170.c

   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
  27 #include <linux/module.h>
  28 #include <linux/types.h>
  29 #include <linux/slab.h>
  30 #include <linux/ioctl.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/i2c.h>
  33 #include <linux/videodev2.h>
  34 #include <media/v4l2-device.h>
  35
  36 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  37 MODULE_AUTHOR("Maxim Yevtyushkin");
  38 MODULE_LICENSE("GPL");
  39
  40
  41 static int debug;
  42 module_param(debug, int, 0);
  43 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  44
  45 /* ----------------------------------------------------------------------- */
  46
  47 struct adv7170 {
  48         struct v4l2_subdev sd;
  49         unsigned char reg[128];
  50
  51         v4l2_std_id norm;
  52         int input;
  53 };
  54
  55 static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)
  56 {
  57         return container_of(sd, struct adv7170, sd);
  58 }
  59
  60 static char *inputs[] = { "pass_through", "play_back" };
  61
  62 static u32 adv7170_codes[] = {
  63         MEDIA_BUS_FMT_UYVY8_2X8,
  64         MEDIA_BUS_FMT_UYVY8_1X16,
  65 };
  66
  67 /* ----------------------------------------------------------------------- */
  68
  69 static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  70 {
  71         struct i2c_client *client = v4l2_get_subdevdata(sd);
  72         struct adv7170 *encoder = to_adv7170(sd);
  73
  74         encoder->reg[reg] = value;
  75         return i2c_smbus_write_byte_data(client, reg, value);
  76 }
  77
  78 static inline int adv7170_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 adv7170_write_block(struct v4l2_subdev *sd,
  86                      const u8 *data, unsigned int len)
  87 {
  88         struct i2c_client *client = v4l2_get_subdevdata(sd);
  89         struct adv7170 *encoder = to_adv7170(sd);
  90         int ret = -1;
  91         u8 reg;
  92
  93         /* the adv7170 has an autoincrement function, use it if
  94          * the adapter understands raw I2C */
  95         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  96                 /* do raw I2C, not smbus compatible */
  97                 u8 block_data[32];
  98                 int block_len;
  99
 100                 while (len >= 2) {
 101                         block_len = 0;
 102                         block_data[block_len++] = reg = data[0];
 103                         do {
 104                                 block_data[block_len++] =
 105                                     encoder->reg[reg++] = data[1];
 106                                 len -= 2;
 107                                 data += 2;
 108                         } while (len >= 2 && data[0] == reg && block_len < 32);
 109                         ret = i2c_master_send(client, block_data, block_len);
 110                         if (ret < 0)
 111                                 break;
 112                 }
 113         } else {
 114                 /* do some slow I2C emulation kind of thing */
 115                 while (len >= 2) {
 116                         reg = *data++;
 117                         ret = adv7170_write(sd, reg, *data++);
 118                         if (ret < 0)
 119                                 break;
 120                         len -= 2;
 121                 }
 122         }
 123         return ret;
 124 }
 125
 126 /* ----------------------------------------------------------------------- */
 127
 128 #define TR0MODE     0x4c
 129 #define TR0RST      0x80
 130
 131 #define TR1CAPT     0x00
 132 #define TR1PLAY     0x00
 133
 134 static const unsigned char init_NTSC[] = {
 135         0x00, 0x10,             /* MR0 */
 136         0x01, 0x20,             /* MR1 */
 137         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 138         0x03, 0x80,             /* MR3 */
 139         0x04, 0x30,             /* MR4 */
 140         0x05, 0x00,             /* Reserved */
 141         0x06, 0x00,             /* Reserved */
 142         0x07, TR0MODE,          /* TM0 */
 143         0x08, TR1CAPT,          /* TM1 */
 144         0x09, 0x16,             /* Fsc0 */
 145         0x0a, 0x7c,             /* Fsc1 */
 146         0x0b, 0xf0,             /* Fsc2 */
 147         0x0c, 0x21,             /* Fsc3 */
 148         0x0d, 0x00,             /* Subcarrier Phase */
 149         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 150         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 151         0x10, 0x00,             /* Closed Capt. 0 */
 152         0x11, 0x00,             /* Closed Capt. 1 */
 153         0x12, 0x00,             /* Pedestal Ctl 0 */
 154         0x13, 0x00,             /* Pedestal Ctl 1 */
 155         0x14, 0x00,             /* Pedestal Ctl 2 */
 156         0x15, 0x00,             /* Pedestal Ctl 3 */
 157         0x16, 0x00,             /* CGMS_WSS_0 */
 158         0x17, 0x00,             /* CGMS_WSS_1 */
 159         0x18, 0x00,             /* CGMS_WSS_2 */
 160         0x19, 0x00,             /* Teletext Ctl */
 161 };
 162
 163 static const unsigned char init_PAL[] = {
 164         0x00, 0x71,             /* MR0 */
 165         0x01, 0x20,             /* MR1 */
 166         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 167         0x03, 0x80,             /* MR3 */
 168         0x04, 0x30,             /* MR4 */
 169         0x05, 0x00,             /* Reserved */
 170         0x06, 0x00,             /* Reserved */
 171         0x07, TR0MODE,          /* TM0 */
 172         0x08, TR1CAPT,          /* TM1 */
 173         0x09, 0xcb,             /* Fsc0 */
 174         0x0a, 0x8a,             /* Fsc1 */
 175         0x0b, 0x09,             /* Fsc2 */
 176         0x0c, 0x2a,             /* Fsc3 */
 177         0x0d, 0x00,             /* Subcarrier Phase */
 178         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 179         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 180         0x10, 0x00,             /* Closed Capt. 0 */
 181         0x11, 0x00,             /* Closed Capt. 1 */
 182         0x12, 0x00,             /* Pedestal Ctl 0 */
 183         0x13, 0x00,             /* Pedestal Ctl 1 */
 184         0x14, 0x00,             /* Pedestal Ctl 2 */
 185         0x15, 0x00,             /* Pedestal Ctl 3 */
 186         0x16, 0x00,             /* CGMS_WSS_0 */
 187         0x17, 0x00,             /* CGMS_WSS_1 */
 188         0x18, 0x00,             /* CGMS_WSS_2 */
 189         0x19, 0x00,             /* Teletext Ctl */
 190 };
 191
 192
 193 static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 194 {
 195         struct adv7170 *encoder = to_adv7170(sd);
 196
 197         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 198
 199         if (std & V4L2_STD_NTSC) {
 200                 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 201                 if (encoder->input == 0)
 202                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 203                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 204                 adv7170_write(sd, 0x07, TR0MODE);
 205         } else if (std & V4L2_STD_PAL) {
 206                 adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
 207                 if (encoder->input == 0)
 208                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 209                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 210                 adv7170_write(sd, 0x07, TR0MODE);
 211         } else {
 212                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 213                                 (unsigned long long)std);
 214                 return -EINVAL;
 215         }
 216         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 217         encoder->norm = std;
 218         return 0;
 219 }
 220
 221 static int adv7170_s_routing(struct v4l2_subdev *sd,
 222                              u32 input, u32 output, u32 config)
 223 {
 224         struct adv7170 *encoder = to_adv7170(sd);
 225
 226         /* RJ: input = 0: input is from decoder
 227            input = 1: input is from ZR36060
 228            input = 2: color bar */
 229
 230         v4l2_dbg(1, debug, sd, "set input from %s\n",
 231                         input == 0 ? "decoder" : "ZR36060");
 232
 233         switch (input) {
 234         case 0:
 235                 adv7170_write(sd, 0x01, 0x20);
 236                 adv7170_write(sd, 0x08, TR1CAPT);       /* TR1 */
 237                 adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 238                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 239                 adv7170_write(sd, 0x07, TR0MODE);
 240                 /* udelay(10); */
 241                 break;
 242
 243         case 1:
 244                 adv7170_write(sd, 0x01, 0x00);
 245                 adv7170_write(sd, 0x08, TR1PLAY);       /* TR1 */
 246                 adv7170_write(sd, 0x02, 0x08);
 247                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 248                 adv7170_write(sd, 0x07, TR0MODE);
 249                 /* udelay(10); */
 250                 break;
 251
 252         default:
 253                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 254                 return -EINVAL;
 255         }
 256         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 257         encoder->input = input;
 258         return 0;
 259 }
 260
 261 static int adv7170_enum_mbus_code(struct v4l2_subdev *sd,
 262                 struct v4l2_subdev_pad_config *cfg,
 263                 struct v4l2_subdev_mbus_code_enum *code)
 264 {
 265         if (code->pad || code->index >= ARRAY_SIZE(adv7170_codes))
 266                 return -EINVAL;
 267
 268         code->code = adv7170_codes[code->index];
 269         return 0;
 270 }
 271
 272 static int adv7170_get_fmt(struct v4l2_subdev *sd,
 273                 struct v4l2_subdev_pad_config *cfg,
 274                 struct v4l2_subdev_format *format)
 275 {
 276         struct v4l2_mbus_framefmt *mf = &format->format;
 277         u8 val = adv7170_read(sd, 0x7);
 278
 279         if (format->pad)
 280                 return -EINVAL;
 281
 282         if ((val & 0x40) == (1 << 6))
 283                 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
 284         else
 285                 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 286
 287         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 288         mf->width       = 0;
 289         mf->height      = 0;
 290         mf->field       = V4L2_FIELD_ANY;
 291
 292         return 0;
 293 }
 294
 295 static int adv7170_set_fmt(struct v4l2_subdev *sd,
 296                 struct v4l2_subdev_pad_config *cfg,
 297                 struct v4l2_subdev_format *format)
 298 {
 299         struct v4l2_mbus_framefmt *mf = &format->format;
 300         u8 val = adv7170_read(sd, 0x7);
 301
 302         if (format->pad)
 303                 return -EINVAL;
 304
 305         switch (mf->code) {
 306         case MEDIA_BUS_FMT_UYVY8_2X8:
 307                 val &= ~0x40;
 308                 break;
 309
 310         case MEDIA_BUS_FMT_UYVY8_1X16:
 311                 val |= 0x40;
 312                 break;
 313
 314         default:
 315                 v4l2_dbg(1, debug, sd,
 316                         "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 317                 return -EINVAL;
 318         }
 319
 320         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 321                 return adv7170_write(sd, 0x7, val);
 322
 323         return 0;
 324 }
 325
 326 /* ----------------------------------------------------------------------- */
 327
 328 static const struct v4l2_subdev_video_ops adv7170_video_ops = {
 329         .s_std_output = adv7170_s_std_output,
 330         .s_routing = adv7170_s_routing,
 331 };
 332
 333 static const struct v4l2_subdev_pad_ops adv7170_pad_ops = {
 334         .enum_mbus_code = adv7170_enum_mbus_code,
 335         .get_fmt = adv7170_get_fmt,
 336         .set_fmt = adv7170_set_fmt,
 337 };
 338
 339 static const struct v4l2_subdev_ops adv7170_ops = {
 340         .video = &adv7170_video_ops,
 341         .pad = &adv7170_pad_ops,
 342 };
 343
 344 /* ----------------------------------------------------------------------- */
 345
 346 static int adv7170_probe(struct i2c_client *client,
 347                         const struct i2c_device_id *id)
 348 {
 349         struct adv7170 *encoder;
 350         struct v4l2_subdev *sd;
 351         int i;
 352
 353         /* Check if the adapter supports the needed features */
 354         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 355                 return -ENODEV;
 356
 357         v4l_info(client, "chip found @ 0x%x (%s)\n",
 358                         client->addr << 1, client->adapter->name);
 359
 360         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 361         if (encoder == NULL)
 362                 return -ENOMEM;
 363         sd = &encoder->sd;
 364         v4l2_i2c_subdev_init(sd, client, &adv7170_ops);
 365         encoder->norm = V4L2_STD_NTSC;
 366         encoder->input = 0;
 367
 368         i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 369         if (i >= 0) {
 370                 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 371                 i = adv7170_write(sd, 0x07, TR0MODE);
 372                 i = adv7170_read(sd, 0x12);
 373                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 374         }
 375         if (i < 0)
 376                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 377         return 0;
 378 }
 379
 380 static int adv7170_remove(struct i2c_client *client)
 381 {
 382         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 383
 384         v4l2_device_unregister_subdev(sd);
 385         return 0;
 386 }
 387
 388 /* ----------------------------------------------------------------------- */
 389
 390 static const struct i2c_device_id adv7170_id[] = {
 391         { "adv7170", 0 },
 392         { "adv7171", 0 },
 393         { }
 394 };
 395 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 396
 397 static struct i2c_driver adv7170_driver = {
 398         .driver = {
 399                 .name   = "adv7170",
 400         },
 401         .probe          = adv7170_probe,
 402         .remove         = adv7170_remove,
 403         .id_table       = adv7170_id,
 404 };
 405
 406 module_i2c_driver(adv7170_driver);