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/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("Philips SAA7185 video encoder driver");
  38 MODULE_AUTHOR("Dave Perks");
  39 MODULE_LICENSE("GPL");
  40
  41 static int debug;
  42 module_param(debug, int, 0);
  43 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  44
  45
  46 /* ----------------------------------------------------------------------- */
  47
  48 struct saa7185 {
  49         struct v4l2_subdev sd;
  50         unsigned char reg[128];
  51
  52         v4l2_std_id norm;
  53 };
  54
  55 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  56 {
  57         return container_of(sd, struct saa7185, sd);
  58 }
  59
  60 /* ----------------------------------------------------------------------- */
  61
  62 static inline int saa7185_read(struct v4l2_subdev *sd)
  63 {
  64         struct i2c_client *client = v4l2_get_subdevdata(sd);
  65
  66         return i2c_smbus_read_byte(client);
  67 }
  68
  69 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  70 {
  71         struct i2c_client *client = v4l2_get_subdevdata(sd);
  72         struct saa7185 *encoder = to_saa7185(sd);
  73
  74         v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  75         encoder->reg[reg] = value;
  76         return i2c_smbus_write_byte_data(client, reg, value);
  77 }
  78
  79 static int saa7185_write_block(struct v4l2_subdev *sd,
  80                 const u8 *data, unsigned int len)
  81 {
  82         struct i2c_client *client = v4l2_get_subdevdata(sd);
  83         struct saa7185 *encoder = to_saa7185(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++] =
  99                                     encoder->reg[reg++] = data[1];
 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 = saa7185_write(sd, reg, *data++);
 112                         if (ret < 0)
 113                                 break;
 114                         len -= 2;
 115                 }
 116         }
 117
 118         return ret;
 119 }
 120
 121 /* ----------------------------------------------------------------------- */
 122
 123 static const unsigned char init_common[] = {
 124         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 125                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 126
 127         0x42, 0x6b,             /* OVLY0=107 */
 128         0x43, 0x00,             /* OVLU0=0     white */
 129         0x44, 0x00,             /* OVLV0=0   */
 130         0x45, 0x22,             /* OVLY1=34  */
 131         0x46, 0xac,             /* OVLU1=172   yellow */
 132         0x47, 0x0e,             /* OVLV1=14  */
 133         0x48, 0x03,             /* OVLY2=3   */
 134         0x49, 0x1d,             /* OVLU2=29    cyan */
 135         0x4a, 0xac,             /* OVLV2=172 */
 136         0x4b, 0xf0,             /* OVLY3=240 */
 137         0x4c, 0xc8,             /* OVLU3=200   green */
 138         0x4d, 0xb9,             /* OVLV3=185 */
 139         0x4e, 0xd4,             /* OVLY4=212 */
 140         0x4f, 0x38,             /* OVLU4=56    magenta */
 141         0x50, 0x47,             /* OVLV4=71  */
 142         0x51, 0xc1,             /* OVLY5=193 */
 143         0x52, 0xe3,             /* OVLU5=227   red */
 144         0x53, 0x54,             /* OVLV5=84  */
 145         0x54, 0xa3,             /* OVLY6=163 */
 146         0x55, 0x54,             /* OVLU6=84    blue */
 147         0x56, 0xf2,             /* OVLV6=242 */
 148         0x57, 0x90,             /* OVLY7=144 */
 149         0x58, 0x00,             /* OVLU7=0     black */
 150         0x59, 0x00,             /* OVLV7=0   */
 151
 152         0x5a, 0x00,             /* CHPS=0    */
 153         0x5b, 0x76,             /* GAINU=118 */
 154         0x5c, 0xa5,             /* GAINV=165 */
 155         0x5d, 0x3c,             /* BLCKL=60  */
 156         0x5e, 0x3a,             /* BLNNL=58  */
 157         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 158         0x60, 0x00,             /* NULL      */
 159
 160         /* 0x61 - 0x66 set according to norm */
 161
 162         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 163         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 164         0x69, 0x00,             /* 0 : caption 1st byte even field */
 165         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 166
 167         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 168         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 169                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 170         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 171
 172         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 173                                  * least for PAL */
 174         0x6f, 0x00,             /* HTRIG upper bits */
 175         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 176
 177         /* The following should not be needed */
 178
 179         0x71, 0x15,             /* BMRQ=0x115 */
 180         0x72, 0x90,             /* EMRQ=0x690 */
 181         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 182         0x74, 0x00,             /* NULL       */
 183         0x75, 0x00,             /* NULL       */
 184         0x76, 0x00,             /* NULL       */
 185         0x77, 0x15,             /* BRCV=0x115 */
 186         0x78, 0x90,             /* ERCV=0x690 */
 187         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 188
 189         /* Field length controls */
 190
 191         0x7a, 0x70,             /* FLC=0 */
 192
 193         /* The following should not be needed if SBLN = 1 */
 194
 195         0x7b, 0x16,             /* FAL=22 */
 196         0x7c, 0x35,             /* LAL=244 */
 197         0x7d, 0x20,             /* LAL=244, FAL=22 */
 198 };
 199
 200 static const unsigned char init_pal[] = {
 201         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 202                                  * YGS=1, INPI=0, DOWN=0 */
 203         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 204         0x63, 0xcb,             /* FSC0 */
 205         0x64, 0x8a,             /* FSC1 */
 206         0x65, 0x09,             /* FSC2 */
 207         0x66, 0x2a,             /* FSC3 */
 208 };
 209
 210 static const unsigned char init_ntsc[] = {
 211         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 212                                  * YGS=1, INPI=0, DOWN=0 */
 213         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 214         0x63, 0x1f,             /* FSC0 */
 215         0x64, 0x7c,             /* FSC1 */
 216         0x65, 0xf0,             /* FSC2 */
 217         0x66, 0x21,             /* FSC3 */
 218 };
 219
 220
 221 static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 222 {
 223         struct saa7185 *encoder = to_saa7185(sd);
 224
 225         saa7185_write_block(sd, init_common, sizeof(init_common));
 226         if (encoder->norm & V4L2_STD_NTSC)
 227                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 228         else
 229                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 230         return 0;
 231 }
 232
 233 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 234 {
 235         struct saa7185 *encoder = to_saa7185(sd);
 236
 237         if (std & V4L2_STD_NTSC)
 238                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 239         else if (std & V4L2_STD_PAL)
 240                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 241         else
 242                 return -EINVAL;
 243         encoder->norm = std;
 244         return 0;
 245 }
 246
 247 static int saa7185_s_routing(struct v4l2_subdev *sd,
 248                              u32 input, u32 output, u32 config)
 249 {
 250         struct saa7185 *encoder = to_saa7185(sd);
 251
 252         /* RJ: input = 0: input is from SA7111
 253          input = 1: input is from ZR36060 */
 254
 255         switch (input) {
 256         case 0:
 257                 /* turn off colorbar */
 258                 saa7185_write(sd, 0x3a, 0x0f);
 259                 /* Switch RTCE to 1 */
 260                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 261                 saa7185_write(sd, 0x6e, 0x01);
 262                 break;
 263
 264         case 1:
 265                 /* turn off colorbar */
 266                 saa7185_write(sd, 0x3a, 0x0f);
 267                 /* Switch RTCE to 0 */
 268                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 269                 /* SW: a slight sync problem... */
 270                 saa7185_write(sd, 0x6e, 0x00);
 271                 break;
 272
 273         case 2:
 274                 /* turn on colorbar */
 275                 saa7185_write(sd, 0x3a, 0x8f);
 276                 /* Switch RTCE to 0 */
 277                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 278                 /* SW: a slight sync problem... */
 279                 saa7185_write(sd, 0x6e, 0x01);
 280                 break;
 281
 282         default:
 283                 return -EINVAL;
 284         }
 285         return 0;
 286 }
 287
 288 static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 289 {
 290         struct i2c_client *client = v4l2_get_subdevdata(sd);
 291
 292         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0);
 293 }
 294
 295 /* ----------------------------------------------------------------------- */
 296
 297 static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 298         .g_chip_ident = saa7185_g_chip_ident,
 299         .init = saa7185_init,
 300 };
 301
 302 static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 303         .s_std_output = saa7185_s_std_output,
 304         .s_routing = saa7185_s_routing,
 305 };
 306
 307 static const struct v4l2_subdev_ops saa7185_ops = {
 308         .core = &saa7185_core_ops,
 309         .video = &saa7185_video_ops,
 310 };
 311
 312
 313 /* ----------------------------------------------------------------------- */
 314
 315 static int saa7185_probe(struct i2c_client *client,
 316                         const struct i2c_device_id *id)
 317 {
 318         int i;
 319         struct saa7185 *encoder;
 320         struct v4l2_subdev *sd;
 321
 322         /* Check if the adapter supports the needed features */
 323         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 324                 return -ENODEV;
 325
 326         v4l_info(client, "chip found @ 0x%x (%s)\n",
 327                         client->addr << 1, client->adapter->name);
 328
 329         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 330         if (encoder == NULL)
 331                 return -ENOMEM;
 332         encoder->norm = V4L2_STD_NTSC;
 333         sd = &encoder->sd;
 334         v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 335
 336         i = saa7185_write_block(sd, init_common, sizeof(init_common));
 337         if (i >= 0)
 338                 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 339         if (i < 0)
 340                 v4l2_dbg(1, debug, sd, "init error %d\n", i);
 341         else
 342                 v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 343                                 saa7185_read(sd) >> 5);
 344         return 0;
 345 }
 346
 347 static int saa7185_remove(struct i2c_client *client)
 348 {
 349         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 350         struct saa7185 *encoder = to_saa7185(sd);
 351
 352         v4l2_device_unregister_subdev(sd);
 353         /* SW: output off is active */
 354         saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 355         kfree(encoder);
 356         return 0;
 357 }
 358
 359 /* ----------------------------------------------------------------------- */
 360
 361 static const struct i2c_device_id saa7185_id[] = {
 362         { "saa7185", 0 },
 363         { }
 364 };
 365 MODULE_DEVICE_TABLE(i2c, saa7185_id);
 366
 367 static struct i2c_driver saa7185_driver = {
 368         .driver = {
 369                 .owner  = THIS_MODULE,
 370                 .name   = "saa7185",
 371         },
 372         .probe          = saa7185_probe,
 373         .remove         = saa7185_remove,
 374         .id_table       = saa7185_id,
 375 };
 376
 377 static __init int init_saa7185(void)
 378 {
 379         return i2c_add_driver(&saa7185_driver);
 380 }
 381
 382 static __exit void exit_saa7185(void)
 383 {
 384         i2c_del_driver(&saa7185_driver);
 385 }
 386
 387 module_init(init_saa7185);
 388 module_exit(exit_saa7185);