drivers/media/video/saa7185.c

   1 /*
   2  * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
   3  *
   4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5  *
   6  * Slight changes for video timing and attachment output by
   7  * Wolfgang Scherr <scherr@net4you.net>
   8  *
   9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  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("Philips SAA7185 video encoder driver");
  39 MODULE_AUTHOR("Dave Perks");
  40 MODULE_LICENSE("GPL");
  41
  42
  43 static int debug;
  44 module_param(debug, int, 0);
  45 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  46
  47 /* ----------------------------------------------------------------------- */
  48
  49 struct saa7185 {
  50         unsigned char reg[128];
  51
  52         int norm;
  53         int enable;
  54         int bright;
  55         int contrast;
  56         int hue;
  57         int sat;
  58 };
  59
  60 /* ----------------------------------------------------------------------- */
  61
  62 static inline int saa7185_read(struct i2c_client *client)
  63 {
  64         return i2c_smbus_read_byte(client);
  65 }
  66
  67 static int saa7185_write(struct i2c_client *client, u8 reg, u8 value)
  68 {
  69         struct saa7185 *encoder = i2c_get_clientdata(client);
  70
  71         v4l_dbg(1, debug, client, "%02x set to %02x\n", reg, value);
  72         encoder->reg[reg] = value;
  73         return i2c_smbus_write_byte_data(client, reg, value);
  74 }
  75
  76 static int saa7185_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                 struct saa7185 *encoder = i2c_get_clientdata(client);
  87                 u8 block_data[32];
  88                 int block_len;
  89
  90                 while (len >= 2) {
  91                         block_len = 0;
  92                         block_data[block_len++] = reg = data[0];
  93                         do {
  94                                 block_data[block_len++] =
  95                                     encoder->reg[reg++] = data[1];
  96                                 len -= 2;
  97                                 data += 2;
  98                         } while (len >= 2 && data[0] == reg && block_len < 32);
  99                         ret = i2c_master_send(client, block_data, block_len);
 100                         if (ret < 0)
 101                                 break;
 102                 }
 103         } else {
 104                 /* do some slow I2C emulation kind of thing */
 105                 while (len >= 2) {
 106                         reg = *data++;
 107                         ret = saa7185_write(client, reg, *data++);
 108                         if (ret < 0)
 109                                 break;
 110                         len -= 2;
 111                 }
 112         }
 113
 114         return ret;
 115 }
 116
 117 /* ----------------------------------------------------------------------- */
 118
 119 static const unsigned char init_common[] = {
 120         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 121                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 122
 123         0x42, 0x6b,             /* OVLY0=107 */
 124         0x43, 0x00,             /* OVLU0=0     white */
 125         0x44, 0x00,             /* OVLV0=0   */
 126         0x45, 0x22,             /* OVLY1=34  */
 127         0x46, 0xac,             /* OVLU1=172   yellow */
 128         0x47, 0x0e,             /* OVLV1=14  */
 129         0x48, 0x03,             /* OVLY2=3   */
 130         0x49, 0x1d,             /* OVLU2=29    cyan */
 131         0x4a, 0xac,             /* OVLV2=172 */
 132         0x4b, 0xf0,             /* OVLY3=240 */
 133         0x4c, 0xc8,             /* OVLU3=200   green */
 134         0x4d, 0xb9,             /* OVLV3=185 */
 135         0x4e, 0xd4,             /* OVLY4=212 */
 136         0x4f, 0x38,             /* OVLU4=56    magenta */
 137         0x50, 0x47,             /* OVLV4=71  */
 138         0x51, 0xc1,             /* OVLY5=193 */
 139         0x52, 0xe3,             /* OVLU5=227   red */
 140         0x53, 0x54,             /* OVLV5=84  */
 141         0x54, 0xa3,             /* OVLY6=163 */
 142         0x55, 0x54,             /* OVLU6=84    blue */
 143         0x56, 0xf2,             /* OVLV6=242 */
 144         0x57, 0x90,             /* OVLY7=144 */
 145         0x58, 0x00,             /* OVLU7=0     black */
 146         0x59, 0x00,             /* OVLV7=0   */
 147
 148         0x5a, 0x00,             /* CHPS=0    */
 149         0x5b, 0x76,             /* GAINU=118 */
 150         0x5c, 0xa5,             /* GAINV=165 */
 151         0x5d, 0x3c,             /* BLCKL=60  */
 152         0x5e, 0x3a,             /* BLNNL=58  */
 153         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 154         0x60, 0x00,             /* NULL      */
 155
 156         /* 0x61 - 0x66 set according to norm */
 157
 158         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 159         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 160         0x69, 0x00,             /* 0 : caption 1st byte even field */
 161         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 162
 163         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 164         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 165                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 166         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 167
 168         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 169                                  * least for PAL */
 170         0x6f, 0x00,             /* HTRIG upper bits */
 171         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 172
 173         /* The following should not be needed */
 174
 175         0x71, 0x15,             /* BMRQ=0x115 */
 176         0x72, 0x90,             /* EMRQ=0x690 */
 177         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 178         0x74, 0x00,             /* NULL       */
 179         0x75, 0x00,             /* NULL       */
 180         0x76, 0x00,             /* NULL       */
 181         0x77, 0x15,             /* BRCV=0x115 */
 182         0x78, 0x90,             /* ERCV=0x690 */
 183         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 184
 185         /* Field length controls */
 186
 187         0x7a, 0x70,             /* FLC=0 */
 188
 189         /* The following should not be needed if SBLN = 1 */
 190
 191         0x7b, 0x16,             /* FAL=22 */
 192         0x7c, 0x35,             /* LAL=244 */
 193         0x7d, 0x20,             /* LAL=244, FAL=22 */
 194 };
 195
 196 static const unsigned char init_pal[] = {
 197         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 198                                  * YGS=1, INPI=0, DOWN=0 */
 199         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 200         0x63, 0xcb,             /* FSC0 */
 201         0x64, 0x8a,             /* FSC1 */
 202         0x65, 0x09,             /* FSC2 */
 203         0x66, 0x2a,             /* FSC3 */
 204 };
 205
 206 static const unsigned char init_ntsc[] = {
 207         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 208                                  * YGS=1, INPI=0, DOWN=0 */
 209         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 210         0x63, 0x1f,             /* FSC0 */
 211         0x64, 0x7c,             /* FSC1 */
 212         0x65, 0xf0,             /* FSC2 */
 213         0x66, 0x21,             /* FSC3 */
 214 };
 215
 216 static int saa7185_command(struct i2c_client *client, unsigned cmd, void *arg)
 217 {
 218         struct saa7185 *encoder = i2c_get_clientdata(client);
 219
 220         switch (cmd) {
 221         case 0:
 222                 saa7185_write_block(client, init_common,
 223                                     sizeof(init_common));
 224                 switch (encoder->norm) {
 225
 226                 case VIDEO_MODE_NTSC:
 227                         saa7185_write_block(client, init_ntsc,
 228                                             sizeof(init_ntsc));
 229                         break;
 230
 231                 case VIDEO_MODE_PAL:
 232                         saa7185_write_block(client, init_pal,
 233                                             sizeof(init_pal));
 234                         break;
 235                 }
 236                 break;
 237
 238         case ENCODER_GET_CAPABILITIES:
 239         {
 240                 struct video_encoder_capability *cap = arg;
 241
 242                 cap->flags =
 243                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 244                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 245                 cap->inputs = 1;
 246                 cap->outputs = 1;
 247                 break;
 248         }
 249
 250         case ENCODER_SET_NORM:
 251         {
 252                 int *iarg = arg;
 253
 254                 //saa7185_write_block(client, init_common, sizeof(init_common));
 255
 256                 switch (*iarg) {
 257                 case VIDEO_MODE_NTSC:
 258                         saa7185_write_block(client, init_ntsc,
 259                                             sizeof(init_ntsc));
 260                         break;
 261
 262                 case VIDEO_MODE_PAL:
 263                         saa7185_write_block(client, init_pal,
 264                                             sizeof(init_pal));
 265                         break;
 266
 267                 case VIDEO_MODE_SECAM:
 268                 default:
 269                         return -EINVAL;
 270                 }
 271                 encoder->norm = *iarg;
 272                 break;
 273         }
 274
 275         case ENCODER_SET_INPUT:
 276         {
 277                 int *iarg = arg;
 278
 279                 /* RJ: *iarg = 0: input is from SA7111
 280                  *iarg = 1: input is from ZR36060 */
 281
 282                 switch (*iarg) {
 283                 case 0:
 284                         /* Switch RTCE to 1 */
 285                         saa7185_write(client, 0x61,
 286                                       (encoder->reg[0x61] & 0xf7) | 0x08);
 287                         saa7185_write(client, 0x6e, 0x01);
 288                         break;
 289
 290                 case 1:
 291                         /* Switch RTCE to 0 */
 292                         saa7185_write(client, 0x61,
 293                                       (encoder->reg[0x61] & 0xf7) | 0x00);
 294                         /* SW: a slight sync problem... */
 295                         saa7185_write(client, 0x6e, 0x00);
 296                         break;
 297
 298                 default:
 299                         return -EINVAL;
 300                 }
 301                 break;
 302         }
 303
 304         case ENCODER_SET_OUTPUT:
 305         {
 306                 int *iarg = arg;
 307
 308                 /* not much choice of outputs */
 309                 if (*iarg != 0)
 310                         return -EINVAL;
 311                 break;
 312         }
 313
 314         case ENCODER_ENABLE_OUTPUT:
 315         {
 316                 int *iarg = arg;
 317
 318                 encoder->enable = !!*iarg;
 319                 saa7185_write(client, 0x61,
 320                               (encoder->reg[0x61] & 0xbf) |
 321                               (encoder->enable ? 0x00 : 0x40));
 322                 break;
 323         }
 324
 325         default:
 326                 return -EINVAL;
 327         }
 328
 329         return 0;
 330 }
 331
 332 /* ----------------------------------------------------------------------- */
 333
 334 static unsigned short normal_i2c[] = { 0x88 >> 1, I2C_CLIENT_END };
 335
 336 I2C_CLIENT_INSMOD;
 337
 338 static int saa7185_probe(struct i2c_client *client,
 339                         const struct i2c_device_id *id)
 340 {
 341         int i;
 342         struct saa7185 *encoder;
 343
 344         /* Check if the adapter supports the needed features */
 345         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 346                 return -ENODEV;
 347
 348         v4l_info(client, "chip found @ 0x%x (%s)\n",
 349                         client->addr << 1, client->adapter->name);
 350
 351         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 352         if (encoder == NULL)
 353                 return -ENOMEM;
 354         encoder->norm = VIDEO_MODE_NTSC;
 355         encoder->enable = 1;
 356         i2c_set_clientdata(client, encoder);
 357
 358         i = saa7185_write_block(client, init_common, sizeof(init_common));
 359         if (i >= 0)
 360                 i = saa7185_write_block(client, init_ntsc, sizeof(init_ntsc));
 361         if (i < 0)
 362                 v4l_dbg(1, debug, client, "init error %d\n", i);
 363         else
 364                 v4l_dbg(1, debug, client, "revision 0x%x\n",
 365                                 saa7185_read(client) >> 5);
 366         return 0;
 367 }
 368
 369 static int saa7185_remove(struct i2c_client *client)
 370 {
 371         struct saa7185 *encoder = i2c_get_clientdata(client);
 372
 373         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 374         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 375
 376         kfree(encoder);
 377         return 0;
 378 }
 379
 380 /* ----------------------------------------------------------------------- */
 381
 382 static const struct i2c_device_id saa7185_id[] = {
 383         { "saa7185", 0 },
 384         { }
 385 };
 386 MODULE_DEVICE_TABLE(i2c, saa7185_id);
 387
 388 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 389         .name = "saa7185",
 390         .driverid = I2C_DRIVERID_SAA7185B,
 391         .command = saa7185_command,
 392         .probe = saa7185_probe,
 393         .remove = saa7185_remove,
 394         .id_table = saa7185_id,
 395 };