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/ioctl.h>
  30 #include <asm/uaccess.h>
  31 #include <linux/i2c.h>
  32 #include <linux/i2c-id.h>
  33 #include <linux/videodev.h>
  34 #include <linux/video_encoder.h>
  35 #include <media/v4l2-common.h>
  36 #include <media/v4l2-i2c-drv-legacy.h>
  37
  38 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  39 MODULE_AUTHOR("Dave Perks");
  40 MODULE_LICENSE("GPL");
  41
  42 static int debug;
  43 module_param(debug, int, 0);
  44 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  45
  46 /* ----------------------------------------------------------------------- */
  47
  48 struct adv7175 {
  49         int norm;
  50         int input;
  51         int enable;
  52         int bright;
  53         int contrast;
  54         int hue;
  55         int sat;
  56 };
  57
  58 #define   I2C_ADV7175        0xd4
  59 #define   I2C_ADV7176        0x54
  60
  61 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  62 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
  63
  64 /* ----------------------------------------------------------------------- */
  65
  66 static inline int adv7175_write(struct i2c_client *client, u8 reg, u8 value)
  67 {
  68         return i2c_smbus_write_byte_data(client, reg, value);
  69 }
  70
  71 static inline int adv7175_read(struct i2c_client *client, u8 reg)
  72 {
  73         return i2c_smbus_read_byte_data(client, reg);
  74 }
  75
  76 static int adv7175_write_block(struct i2c_client *client,
  77                      const u8 *data, unsigned int len)
  78 {
  79         int ret = -1;
  80         u8 reg;
  81
  82         /* the adv7175 has an autoincrement function, use it if
  83          * the adapter understands raw I2C */
  84         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  85                 /* do raw I2C, not smbus compatible */
  86                 u8 block_data[32];
  87                 int block_len;
  88
  89                 while (len >= 2) {
  90                         block_len = 0;
  91                         block_data[block_len++] = reg = data[0];
  92                         do {
  93                                 block_data[block_len++] = data[1];
  94                                 reg++;
  95                                 len -= 2;
  96                                 data += 2;
  97                         } while (len >= 2 && data[0] == reg && block_len < 32);
  98                         ret = i2c_master_send(client, block_data, block_len);
  99                         if (ret < 0)
 100                                 break;
 101                 }
 102         } else {
 103                 /* do some slow I2C emulation kind of thing */
 104                 while (len >= 2) {
 105                         reg = *data++;
 106                         ret = adv7175_write(client, reg, *data++);
 107                         if (ret < 0)
 108                                 break;
 109                         len -= 2;
 110                 }
 111         }
 112
 113         return ret;
 114 }
 115
 116 static void set_subcarrier_freq(struct i2c_client *client, int pass_through)
 117 {
 118         /* for some reason pass_through NTSC needs
 119          * a different sub-carrier freq to remain stable. */
 120         if (pass_through)
 121                 adv7175_write(client, 0x02, 0x00);
 122         else
 123                 adv7175_write(client, 0x02, 0x55);
 124
 125         adv7175_write(client, 0x03, 0x55);
 126         adv7175_write(client, 0x04, 0x55);
 127         adv7175_write(client, 0x05, 0x25);
 128 }
 129
 130 /* ----------------------------------------------------------------------- */
 131 /* Output filter:  S-Video  Composite */
 132
 133 #define MR050       0x11        /* 0x09 */
 134 #define MR060       0x14        /* 0x0c */
 135
 136 /* ----------------------------------------------------------------------- */
 137
 138 #define TR0MODE     0x46
 139 #define TR0RST      0x80
 140
 141 #define TR1CAPT     0x80
 142 #define TR1PLAY     0x00
 143
 144 static const unsigned char init_common[] = {
 145
 146         0x00, MR050,            /* MR0, PAL enabled */
 147         0x01, 0x00,             /* MR1 */
 148         0x02, 0x0c,             /* subc. freq. */
 149         0x03, 0x8c,             /* subc. freq. */
 150         0x04, 0x79,             /* subc. freq. */
 151         0x05, 0x26,             /* subc. freq. */
 152         0x06, 0x40,             /* subc. phase */
 153
 154         0x07, TR0MODE,          /* TR0, 16bit */
 155         0x08, 0x21,             /*  */
 156         0x09, 0x00,             /*  */
 157         0x0a, 0x00,             /*  */
 158         0x0b, 0x00,             /*  */
 159         0x0c, TR1CAPT,          /* TR1 */
 160         0x0d, 0x4f,             /* MR2 */
 161         0x0e, 0x00,             /*  */
 162         0x0f, 0x00,             /*  */
 163         0x10, 0x00,             /*  */
 164         0x11, 0x00,             /*  */
 165 };
 166
 167 static const unsigned char init_pal[] = {
 168         0x00, MR050,            /* MR0, PAL enabled */
 169         0x01, 0x00,             /* MR1 */
 170         0x02, 0x0c,             /* subc. freq. */
 171         0x03, 0x8c,             /* subc. freq. */
 172         0x04, 0x79,             /* subc. freq. */
 173         0x05, 0x26,             /* subc. freq. */
 174         0x06, 0x40,             /* subc. phase */
 175 };
 176
 177 static const unsigned char init_ntsc[] = {
 178         0x00, MR060,            /* MR0, NTSC enabled */
 179         0x01, 0x00,             /* MR1 */
 180         0x02, 0x55,             /* subc. freq. */
 181         0x03, 0x55,             /* subc. freq. */
 182         0x04, 0x55,             /* subc. freq. */
 183         0x05, 0x25,             /* subc. freq. */
 184         0x06, 0x1a,             /* subc. phase */
 185 };
 186
 187 static int adv7175_command(struct i2c_client *client, unsigned cmd, void *arg)
 188 {
 189         struct adv7175 *encoder = i2c_get_clientdata(client);
 190
 191         switch (cmd) {
 192         case 0:
 193                 /* This is just for testing!!! */
 194                 adv7175_write_block(client, init_common,
 195                                     sizeof(init_common));
 196                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
 197                 adv7175_write(client, 0x07, TR0MODE);
 198                 break;
 199
 200         case ENCODER_GET_CAPABILITIES:
 201         {
 202                 struct video_encoder_capability *cap = arg;
 203
 204                 cap->flags = VIDEO_ENCODER_PAL |
 205                              VIDEO_ENCODER_NTSC |
 206                              VIDEO_ENCODER_SECAM; /* well, hacky */
 207                 cap->inputs = 2;
 208                 cap->outputs = 1;
 209                 break;
 210         }
 211
 212         case ENCODER_SET_NORM:
 213         {
 214                 int iarg = *(int *) arg;
 215
 216                 switch (iarg) {
 217                 case VIDEO_MODE_NTSC:
 218                         adv7175_write_block(client, init_ntsc,
 219                                             sizeof(init_ntsc));
 220                         if (encoder->input == 0)
 221                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 222                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 223                         adv7175_write(client, 0x07, TR0MODE);
 224                         break;
 225
 226                 case VIDEO_MODE_PAL:
 227                         adv7175_write_block(client, init_pal,
 228                                             sizeof(init_pal));
 229                         if (encoder->input == 0)
 230                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 231                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 232                         adv7175_write(client, 0x07, TR0MODE);
 233                         break;
 234
 235                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
 236                         /* This is an attempt to convert
 237                          * SECAM->PAL (typically it does not work
 238                          * due to genlock: when decoder is in SECAM
 239                          * and encoder in in PAL the subcarrier can
 240                          * not be syncronized with horizontal
 241                          * quency) */
 242                         adv7175_write_block(client, init_pal,
 243                                             sizeof(init_pal));
 244                         if (encoder->input == 0)
 245                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 246                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 247                         adv7175_write(client, 0x07, TR0MODE);
 248                         break;
 249                 default:
 250                         v4l_dbg(1, debug, client, "illegal norm: %d\n", iarg);
 251                         return -EINVAL;
 252                 }
 253                 v4l_dbg(1, debug, client, "switched to %s\n", norms[iarg]);
 254                 encoder->norm = iarg;
 255                 break;
 256         }
 257
 258         case ENCODER_SET_INPUT:
 259         {
 260                 int iarg = *(int *) arg;
 261
 262                 /* RJ: *iarg = 0: input is from SAA7110
 263                  *iarg = 1: input is from ZR36060
 264                  *iarg = 2: color bar */
 265
 266                 switch (iarg) {
 267                 case 0:
 268                         adv7175_write(client, 0x01, 0x00);
 269
 270                         if (encoder->norm == VIDEO_MODE_NTSC)
 271                                 set_subcarrier_freq(client, 1);
 272
 273                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
 274                         if (encoder->norm == VIDEO_MODE_SECAM)
 275                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
 276                         else
 277                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
 278                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 279                         adv7175_write(client, 0x07, TR0MODE);
 280                         //udelay(10);
 281                         break;
 282
 283                 case 1:
 284                         adv7175_write(client, 0x01, 0x00);
 285
 286                         if (encoder->norm == VIDEO_MODE_NTSC)
 287                                 set_subcarrier_freq(client, 0);
 288
 289                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
 290                         adv7175_write(client, 0x0d, 0x49);
 291                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 292                         adv7175_write(client, 0x07, TR0MODE);
 293                         /* udelay(10); */
 294                         break;
 295
 296                 case 2:
 297                         adv7175_write(client, 0x01, 0x80);
 298
 299                         if (encoder->norm == VIDEO_MODE_NTSC)
 300                                 set_subcarrier_freq(client, 0);
 301
 302                         adv7175_write(client, 0x0d, 0x49);
 303                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
 304                         adv7175_write(client, 0x07, TR0MODE);
 305                         /* udelay(10); */
 306                         break;
 307
 308                 default:
 309                         v4l_dbg(1, debug, client, "illegal input: %d\n", iarg);
 310                         return -EINVAL;
 311                 }
 312                 v4l_dbg(1, debug, client, "switched to %s\n", inputs[iarg]);
 313                 encoder->input = iarg;
 314                 break;
 315         }
 316
 317         case ENCODER_SET_OUTPUT:
 318         {
 319                 int *iarg = arg;
 320
 321                 /* not much choice of outputs */
 322                 if (*iarg != 0)
 323                         return -EINVAL;
 324                 break;
 325         }
 326
 327         case ENCODER_ENABLE_OUTPUT:
 328         {
 329                 int *iarg = arg;
 330
 331                 encoder->enable = !!*iarg;
 332                 break;
 333         }
 334
 335         default:
 336                 return -EINVAL;
 337         }
 338
 339         return 0;
 340 }
 341
 342 /* ----------------------------------------------------------------------- */
 343
 344 /*
 345  * Generic i2c probe
 346  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 347  */
 348 static unsigned short normal_i2c[] = {
 349         I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
 350         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
 351         I2C_CLIENT_END
 352 };
 353
 354 I2C_CLIENT_INSMOD;
 355
 356 static int adv7175_probe(struct i2c_client *client,
 357                         const struct i2c_device_id *id)
 358 {
 359         int i;
 360         struct adv7175 *encoder;
 361
 362         /* Check if the adapter supports the needed features */
 363         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 364                 return -ENODEV;
 365
 366         v4l_info(client, "chip found @ 0x%x (%s)\n",
 367                         client->addr << 1, client->adapter->name);
 368
 369         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 370         if (encoder == NULL)
 371                 return -ENOMEM;
 372         encoder->norm = VIDEO_MODE_PAL;
 373         encoder->input = 0;
 374         encoder->enable = 1;
 375         i2c_set_clientdata(client, encoder);
 376
 377         i = adv7175_write_block(client, init_common, sizeof(init_common));
 378         if (i >= 0) {
 379                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
 380                 i = adv7175_write(client, 0x07, TR0MODE);
 381                 i = adv7175_read(client, 0x12);
 382                 v4l_dbg(1, debug, client, "revision %d\n", i & 1);
 383         }
 384         if (i < 0)
 385                 v4l_dbg(1, debug, client, "init error 0x%x\n", i);
 386         return 0;
 387 }
 388
 389 static int adv7175_remove(struct i2c_client *client)
 390 {
 391         kfree(i2c_get_clientdata(client));
 392         return 0;
 393 }
 394
 395 /* ----------------------------------------------------------------------- */
 396
 397 static const struct i2c_device_id adv7175_id[] = {
 398         { "adv7175", 0 },
 399         { "adv7176", 0 },
 400         { }
 401 };
 402 MODULE_DEVICE_TABLE(i2c, adv7175_id);
 403
 404 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 405         .name = "adv7175",
 406         .driverid = I2C_DRIVERID_ADV7175,
 407         .command = adv7175_command,
 408         .probe = adv7175_probe,
 409         .remove = adv7175_remove,
 410         .id_table = adv7175_id,
 411 };