drivers/media/video/adv7175.c

   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 /* ----------------------------------------------------------------------- */
  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_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 300 {
 301         struct i2c_client *client = v4l2_get_subdevdata(sd);
 302
 303         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
 304 }
 305
 306 static int adv7175_s_power(struct v4l2_subdev *sd, int on)
 307 {
 308         if (on)
 309                 adv7175_write(sd, 0x01, 0x00);
 310         else
 311                 adv7175_write(sd, 0x01, 0x78);
 312
 313         return 0;
 314 }
 315
 316 /* ----------------------------------------------------------------------- */
 317
 318 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
 319         .g_chip_ident = adv7175_g_chip_ident,
 320         .init = adv7175_init,
 321         .s_power = adv7175_s_power,
 322 };
 323
 324 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 325         .s_std_output = adv7175_s_std_output,
 326         .s_routing = adv7175_s_routing,
 327 };
 328
 329 static const struct v4l2_subdev_ops adv7175_ops = {
 330         .core = &adv7175_core_ops,
 331         .video = &adv7175_video_ops,
 332 };
 333
 334 /* ----------------------------------------------------------------------- */
 335
 336 static int adv7175_probe(struct i2c_client *client,
 337                         const struct i2c_device_id *id)
 338 {
 339         int i;
 340         struct adv7175 *encoder;
 341         struct v4l2_subdev *sd;
 342
 343         /* Check if the adapter supports the needed features */
 344         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 345                 return -ENODEV;
 346
 347         v4l_info(client, "chip found @ 0x%x (%s)\n",
 348                         client->addr << 1, client->adapter->name);
 349
 350         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 351         if (encoder == NULL)
 352                 return -ENOMEM;
 353         sd = &encoder->sd;
 354         v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 355         encoder->norm = V4L2_STD_NTSC;
 356         encoder->input = 0;
 357
 358         i = adv7175_write_block(sd, init_common, sizeof(init_common));
 359         if (i >= 0) {
 360                 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 361                 i = adv7175_write(sd, 0x07, TR0MODE);
 362                 i = adv7175_read(sd, 0x12);
 363                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 364         }
 365         if (i < 0)
 366                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 367         return 0;
 368 }
 369
 370 static int adv7175_remove(struct i2c_client *client)
 371 {
 372         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 373
 374         v4l2_device_unregister_subdev(sd);
 375         kfree(to_adv7175(sd));
 376         return 0;
 377 }
 378
 379 /* ----------------------------------------------------------------------- */
 380
 381 static const struct i2c_device_id adv7175_id[] = {
 382         { "adv7175", 0 },
 383         { "adv7176", 0 },
 384         { }
 385 };
 386 MODULE_DEVICE_TABLE(i2c, adv7175_id);
 387
 388 static struct i2c_driver adv7175_driver = {
 389         .driver = {
 390                 .owner  = THIS_MODULE,
 391                 .name   = "adv7175",
 392         },
 393         .probe          = adv7175_probe,
 394         .remove         = adv7175_remove,
 395         .id_table       = adv7175_id,
 396 };
 397
 398 static __init int init_adv7175(void)
 399 {
 400         return i2c_add_driver(&adv7175_driver);
 401 }
 402
 403 static __exit void exit_adv7175(void)
 404 {
 405         i2c_del_driver(&adv7175_driver);
 406 }
 407
 408 module_init(init_adv7175);
 409 module_exit(exit_adv7175);