drivers/media/i2c/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
  23 #include <linux/module.h>
  24 #include <linux/types.h>
  25 #include <linux/slab.h>
  26 #include <linux/ioctl.h>
  27 #include <linux/uaccess.h>
  28 #include <linux/i2c.h>
  29 #include <linux/videodev2.h>
  30 #include <media/v4l2-device.h>
  31
  32 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  33 MODULE_AUTHOR("Dave Perks");
  34 MODULE_LICENSE("GPL");
  35
  36 static int debug;
  37 module_param(debug, int, 0);
  38 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  39
  40
  41 /* ----------------------------------------------------------------------- */
  42
  43 struct saa7185 {
  44         struct v4l2_subdev sd;
  45         unsigned char reg[128];
  46
  47         v4l2_std_id norm;
  48 };
  49
  50 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  51 {
  52         return container_of(sd, struct saa7185, sd);
  53 }
  54
  55 /* ----------------------------------------------------------------------- */
  56
  57 static inline int saa7185_read(struct v4l2_subdev *sd)
  58 {
  59         struct i2c_client *client = v4l2_get_subdevdata(sd);
  60
  61         return i2c_smbus_read_byte(client);
  62 }
  63
  64 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  65 {
  66         struct i2c_client *client = v4l2_get_subdevdata(sd);
  67         struct saa7185 *encoder = to_saa7185(sd);
  68
  69         v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  70         encoder->reg[reg] = value;
  71         return i2c_smbus_write_byte_data(client, reg, value);
  72 }
  73
  74 static int saa7185_write_block(struct v4l2_subdev *sd,
  75                 const u8 *data, unsigned int len)
  76 {
  77         struct i2c_client *client = v4l2_get_subdevdata(sd);
  78         struct saa7185 *encoder = to_saa7185(sd);
  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++] =
  94                                     encoder->reg[reg++] = data[1];
  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 = saa7185_write(sd, reg, *data++);
 107                         if (ret < 0)
 108                                 break;
 109                         len -= 2;
 110                 }
 111         }
 112
 113         return ret;
 114 }
 115
 116 /* ----------------------------------------------------------------------- */
 117
 118 static const unsigned char init_common[] = {
 119         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 120                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 121
 122         0x42, 0x6b,             /* OVLY0=107 */
 123         0x43, 0x00,             /* OVLU0=0     white */
 124         0x44, 0x00,             /* OVLV0=0   */
 125         0x45, 0x22,             /* OVLY1=34  */
 126         0x46, 0xac,             /* OVLU1=172   yellow */
 127         0x47, 0x0e,             /* OVLV1=14  */
 128         0x48, 0x03,             /* OVLY2=3   */
 129         0x49, 0x1d,             /* OVLU2=29    cyan */
 130         0x4a, 0xac,             /* OVLV2=172 */
 131         0x4b, 0xf0,             /* OVLY3=240 */
 132         0x4c, 0xc8,             /* OVLU3=200   green */
 133         0x4d, 0xb9,             /* OVLV3=185 */
 134         0x4e, 0xd4,             /* OVLY4=212 */
 135         0x4f, 0x38,             /* OVLU4=56    magenta */
 136         0x50, 0x47,             /* OVLV4=71  */
 137         0x51, 0xc1,             /* OVLY5=193 */
 138         0x52, 0xe3,             /* OVLU5=227   red */
 139         0x53, 0x54,             /* OVLV5=84  */
 140         0x54, 0xa3,             /* OVLY6=163 */
 141         0x55, 0x54,             /* OVLU6=84    blue */
 142         0x56, 0xf2,             /* OVLV6=242 */
 143         0x57, 0x90,             /* OVLY7=144 */
 144         0x58, 0x00,             /* OVLU7=0     black */
 145         0x59, 0x00,             /* OVLV7=0   */
 146
 147         0x5a, 0x00,             /* CHPS=0    */
 148         0x5b, 0x76,             /* GAINU=118 */
 149         0x5c, 0xa5,             /* GAINV=165 */
 150         0x5d, 0x3c,             /* BLCKL=60  */
 151         0x5e, 0x3a,             /* BLNNL=58  */
 152         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 153         0x60, 0x00,             /* NULL      */
 154
 155         /* 0x61 - 0x66 set according to norm */
 156
 157         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 158         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 159         0x69, 0x00,             /* 0 : caption 1st byte even field */
 160         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 161
 162         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 163         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 164                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 165         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 166
 167         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 168                                  * least for PAL */
 169         0x6f, 0x00,             /* HTRIG upper bits */
 170         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 171
 172         /* The following should not be needed */
 173
 174         0x71, 0x15,             /* BMRQ=0x115 */
 175         0x72, 0x90,             /* EMRQ=0x690 */
 176         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 177         0x74, 0x00,             /* NULL       */
 178         0x75, 0x00,             /* NULL       */
 179         0x76, 0x00,             /* NULL       */
 180         0x77, 0x15,             /* BRCV=0x115 */
 181         0x78, 0x90,             /* ERCV=0x690 */
 182         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 183
 184         /* Field length controls */
 185
 186         0x7a, 0x70,             /* FLC=0 */
 187
 188         /* The following should not be needed if SBLN = 1 */
 189
 190         0x7b, 0x16,             /* FAL=22 */
 191         0x7c, 0x35,             /* LAL=244 */
 192         0x7d, 0x20,             /* LAL=244, FAL=22 */
 193 };
 194
 195 static const unsigned char init_pal[] = {
 196         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 197                                  * YGS=1, INPI=0, DOWN=0 */
 198         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 199         0x63, 0xcb,             /* FSC0 */
 200         0x64, 0x8a,             /* FSC1 */
 201         0x65, 0x09,             /* FSC2 */
 202         0x66, 0x2a,             /* FSC3 */
 203 };
 204
 205 static const unsigned char init_ntsc[] = {
 206         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 207                                  * YGS=1, INPI=0, DOWN=0 */
 208         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 209         0x63, 0x1f,             /* FSC0 */
 210         0x64, 0x7c,             /* FSC1 */
 211         0x65, 0xf0,             /* FSC2 */
 212         0x66, 0x21,             /* FSC3 */
 213 };
 214
 215
 216 static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 217 {
 218         struct saa7185 *encoder = to_saa7185(sd);
 219
 220         saa7185_write_block(sd, init_common, sizeof(init_common));
 221         if (encoder->norm & V4L2_STD_NTSC)
 222                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 223         else
 224                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 225         return 0;
 226 }
 227
 228 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 229 {
 230         struct saa7185 *encoder = to_saa7185(sd);
 231
 232         if (std & V4L2_STD_NTSC)
 233                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 234         else if (std & V4L2_STD_PAL)
 235                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 236         else
 237                 return -EINVAL;
 238         encoder->norm = std;
 239         return 0;
 240 }
 241
 242 static int saa7185_s_routing(struct v4l2_subdev *sd,
 243                              u32 input, u32 output, u32 config)
 244 {
 245         struct saa7185 *encoder = to_saa7185(sd);
 246
 247         /* RJ: input = 0: input is from SA7111
 248          input = 1: input is from ZR36060 */
 249
 250         switch (input) {
 251         case 0:
 252                 /* turn off colorbar */
 253                 saa7185_write(sd, 0x3a, 0x0f);
 254                 /* Switch RTCE to 1 */
 255                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 256                 saa7185_write(sd, 0x6e, 0x01);
 257                 break;
 258
 259         case 1:
 260                 /* turn off colorbar */
 261                 saa7185_write(sd, 0x3a, 0x0f);
 262                 /* Switch RTCE to 0 */
 263                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 264                 /* SW: a slight sync problem... */
 265                 saa7185_write(sd, 0x6e, 0x00);
 266                 break;
 267
 268         case 2:
 269                 /* turn on colorbar */
 270                 saa7185_write(sd, 0x3a, 0x8f);
 271                 /* Switch RTCE to 0 */
 272                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 273                 /* SW: a slight sync problem... */
 274                 saa7185_write(sd, 0x6e, 0x01);
 275                 break;
 276
 277         default:
 278                 return -EINVAL;
 279         }
 280         return 0;
 281 }
 282
 283 /* ----------------------------------------------------------------------- */
 284
 285 static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 286         .init = saa7185_init,
 287 };
 288
 289 static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 290         .s_std_output = saa7185_s_std_output,
 291         .s_routing = saa7185_s_routing,
 292 };
 293
 294 static const struct v4l2_subdev_ops saa7185_ops = {
 295         .core = &saa7185_core_ops,
 296         .video = &saa7185_video_ops,
 297 };
 298
 299
 300 /* ----------------------------------------------------------------------- */
 301
 302 static int saa7185_probe(struct i2c_client *client,
 303                         const struct i2c_device_id *id)
 304 {
 305         int i;
 306         struct saa7185 *encoder;
 307         struct v4l2_subdev *sd;
 308
 309         /* Check if the adapter supports the needed features */
 310         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 311                 return -ENODEV;
 312
 313         v4l_info(client, "chip found @ 0x%x (%s)\n",
 314                         client->addr << 1, client->adapter->name);
 315
 316         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 317         if (encoder == NULL)
 318                 return -ENOMEM;
 319         encoder->norm = V4L2_STD_NTSC;
 320         sd = &encoder->sd;
 321         v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 322
 323         i = saa7185_write_block(sd, init_common, sizeof(init_common));
 324         if (i >= 0)
 325                 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 326         if (i < 0)
 327                 v4l2_dbg(1, debug, sd, "init error %d\n", i);
 328         else
 329                 v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 330                                 saa7185_read(sd) >> 5);
 331         return 0;
 332 }
 333
 334 static int saa7185_remove(struct i2c_client *client)
 335 {
 336         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 337         struct saa7185 *encoder = to_saa7185(sd);
 338
 339         v4l2_device_unregister_subdev(sd);
 340         /* SW: output off is active */
 341         saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 342         return 0;
 343 }
 344
 345 /* ----------------------------------------------------------------------- */
 346
 347 static const struct i2c_device_id saa7185_id[] = {
 348         { "saa7185", 0 },
 349         { }
 350 };
 351 MODULE_DEVICE_TABLE(i2c, saa7185_id);
 352
 353 static struct i2c_driver saa7185_driver = {
 354         .driver = {
 355                 .name   = "saa7185",
 356         },
 357         .probe          = saa7185_probe,
 358         .remove         = saa7185_remove,
 359         .id_table       = saa7185_id,
 360 };
 361
 362 module_i2c_driver(saa7185_driver);