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  * 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
  36 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  37 MODULE_AUTHOR("Dave Perks");
  38 MODULE_LICENSE("GPL");
  39
  40 static int debug;
  41 module_param(debug, int, 0);
  42 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  43
  44
  45 /* ----------------------------------------------------------------------- */
  46
  47 struct saa7185 {
  48         struct v4l2_subdev sd;
  49         unsigned char reg[128];
  50
  51         v4l2_std_id norm;
  52 };
  53
  54 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  55 {
  56         return container_of(sd, struct saa7185, sd);
  57 }
  58
  59 /* ----------------------------------------------------------------------- */
  60
  61 static inline int saa7185_read(struct v4l2_subdev *sd)
  62 {
  63         struct i2c_client *client = v4l2_get_subdevdata(sd);
  64
  65         return i2c_smbus_read_byte(client);
  66 }
  67
  68 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  69 {
  70         struct i2c_client *client = v4l2_get_subdevdata(sd);
  71         struct saa7185 *encoder = to_saa7185(sd);
  72
  73         v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  74         encoder->reg[reg] = value;
  75         return i2c_smbus_write_byte_data(client, reg, value);
  76 }
  77
  78 static int saa7185_write_block(struct v4l2_subdev *sd,
  79                 const u8 *data, unsigned int len)
  80 {
  81         struct i2c_client *client = v4l2_get_subdevdata(sd);
  82         struct saa7185 *encoder = to_saa7185(sd);
  83         int ret = -1;
  84         u8 reg;
  85
  86         /* the adv7175 has an autoincrement function, use it if
  87          * the adapter understands raw I2C */
  88         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  89                 /* do raw I2C, not smbus compatible */
  90                 u8 block_data[32];
  91                 int block_len;
  92
  93                 while (len >= 2) {
  94                         block_len = 0;
  95                         block_data[block_len++] = reg = data[0];
  96                         do {
  97                                 block_data[block_len++] =
  98                                     encoder->reg[reg++] = data[1];
  99                                 len -= 2;
 100                                 data += 2;
 101                         } while (len >= 2 && data[0] == reg && block_len < 32);
 102                         ret = i2c_master_send(client, block_data, block_len);
 103                         if (ret < 0)
 104                                 break;
 105                 }
 106         } else {
 107                 /* do some slow I2C emulation kind of thing */
 108                 while (len >= 2) {
 109                         reg = *data++;
 110                         ret = saa7185_write(sd, reg, *data++);
 111                         if (ret < 0)
 112                                 break;
 113                         len -= 2;
 114                 }
 115         }
 116
 117         return ret;
 118 }
 119
 120 /* ----------------------------------------------------------------------- */
 121
 122 static const unsigned char init_common[] = {
 123         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 124                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 125
 126         0x42, 0x6b,             /* OVLY0=107 */
 127         0x43, 0x00,             /* OVLU0=0     white */
 128         0x44, 0x00,             /* OVLV0=0   */
 129         0x45, 0x22,             /* OVLY1=34  */
 130         0x46, 0xac,             /* OVLU1=172   yellow */
 131         0x47, 0x0e,             /* OVLV1=14  */
 132         0x48, 0x03,             /* OVLY2=3   */
 133         0x49, 0x1d,             /* OVLU2=29    cyan */
 134         0x4a, 0xac,             /* OVLV2=172 */
 135         0x4b, 0xf0,             /* OVLY3=240 */
 136         0x4c, 0xc8,             /* OVLU3=200   green */
 137         0x4d, 0xb9,             /* OVLV3=185 */
 138         0x4e, 0xd4,             /* OVLY4=212 */
 139         0x4f, 0x38,             /* OVLU4=56    magenta */
 140         0x50, 0x47,             /* OVLV4=71  */
 141         0x51, 0xc1,             /* OVLY5=193 */
 142         0x52, 0xe3,             /* OVLU5=227   red */
 143         0x53, 0x54,             /* OVLV5=84  */
 144         0x54, 0xa3,             /* OVLY6=163 */
 145         0x55, 0x54,             /* OVLU6=84    blue */
 146         0x56, 0xf2,             /* OVLV6=242 */
 147         0x57, 0x90,             /* OVLY7=144 */
 148         0x58, 0x00,             /* OVLU7=0     black */
 149         0x59, 0x00,             /* OVLV7=0   */
 150
 151         0x5a, 0x00,             /* CHPS=0    */
 152         0x5b, 0x76,             /* GAINU=118 */
 153         0x5c, 0xa5,             /* GAINV=165 */
 154         0x5d, 0x3c,             /* BLCKL=60  */
 155         0x5e, 0x3a,             /* BLNNL=58  */
 156         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 157         0x60, 0x00,             /* NULL      */
 158
 159         /* 0x61 - 0x66 set according to norm */
 160
 161         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 162         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 163         0x69, 0x00,             /* 0 : caption 1st byte even field */
 164         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 165
 166         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 167         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 168                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 169         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 170
 171         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 172                                  * least for PAL */
 173         0x6f, 0x00,             /* HTRIG upper bits */
 174         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 175
 176         /* The following should not be needed */
 177
 178         0x71, 0x15,             /* BMRQ=0x115 */
 179         0x72, 0x90,             /* EMRQ=0x690 */
 180         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 181         0x74, 0x00,             /* NULL       */
 182         0x75, 0x00,             /* NULL       */
 183         0x76, 0x00,             /* NULL       */
 184         0x77, 0x15,             /* BRCV=0x115 */
 185         0x78, 0x90,             /* ERCV=0x690 */
 186         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 187
 188         /* Field length controls */
 189
 190         0x7a, 0x70,             /* FLC=0 */
 191
 192         /* The following should not be needed if SBLN = 1 */
 193
 194         0x7b, 0x16,             /* FAL=22 */
 195         0x7c, 0x35,             /* LAL=244 */
 196         0x7d, 0x20,             /* LAL=244, FAL=22 */
 197 };
 198
 199 static const unsigned char init_pal[] = {
 200         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 201                                  * YGS=1, INPI=0, DOWN=0 */
 202         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 203         0x63, 0xcb,             /* FSC0 */
 204         0x64, 0x8a,             /* FSC1 */
 205         0x65, 0x09,             /* FSC2 */
 206         0x66, 0x2a,             /* FSC3 */
 207 };
 208
 209 static const unsigned char init_ntsc[] = {
 210         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 211                                  * YGS=1, INPI=0, DOWN=0 */
 212         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 213         0x63, 0x1f,             /* FSC0 */
 214         0x64, 0x7c,             /* FSC1 */
 215         0x65, 0xf0,             /* FSC2 */
 216         0x66, 0x21,             /* FSC3 */
 217 };
 218
 219
 220 static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 221 {
 222         struct saa7185 *encoder = to_saa7185(sd);
 223
 224         saa7185_write_block(sd, init_common, sizeof(init_common));
 225         if (encoder->norm & V4L2_STD_NTSC)
 226                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 227         else
 228                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 229         return 0;
 230 }
 231
 232 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 233 {
 234         struct saa7185 *encoder = to_saa7185(sd);
 235
 236         if (std & V4L2_STD_NTSC)
 237                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 238         else if (std & V4L2_STD_PAL)
 239                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 240         else
 241                 return -EINVAL;
 242         encoder->norm = std;
 243         return 0;
 244 }
 245
 246 static int saa7185_s_routing(struct v4l2_subdev *sd,
 247                              u32 input, u32 output, u32 config)
 248 {
 249         struct saa7185 *encoder = to_saa7185(sd);
 250
 251         /* RJ: input = 0: input is from SA7111
 252          input = 1: input is from ZR36060 */
 253
 254         switch (input) {
 255         case 0:
 256                 /* turn off colorbar */
 257                 saa7185_write(sd, 0x3a, 0x0f);
 258                 /* Switch RTCE to 1 */
 259                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 260                 saa7185_write(sd, 0x6e, 0x01);
 261                 break;
 262
 263         case 1:
 264                 /* turn off colorbar */
 265                 saa7185_write(sd, 0x3a, 0x0f);
 266                 /* Switch RTCE to 0 */
 267                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 268                 /* SW: a slight sync problem... */
 269                 saa7185_write(sd, 0x6e, 0x00);
 270                 break;
 271
 272         case 2:
 273                 /* turn on colorbar */
 274                 saa7185_write(sd, 0x3a, 0x8f);
 275                 /* Switch RTCE to 0 */
 276                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 277                 /* SW: a slight sync problem... */
 278                 saa7185_write(sd, 0x6e, 0x01);
 279                 break;
 280
 281         default:
 282                 return -EINVAL;
 283         }
 284         return 0;
 285 }
 286
 287 /* ----------------------------------------------------------------------- */
 288
 289 static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 290         .init = saa7185_init,
 291 };
 292
 293 static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 294         .s_std_output = saa7185_s_std_output,
 295         .s_routing = saa7185_s_routing,
 296 };
 297
 298 static const struct v4l2_subdev_ops saa7185_ops = {
 299         .core = &saa7185_core_ops,
 300         .video = &saa7185_video_ops,
 301 };
 302
 303
 304 /* ----------------------------------------------------------------------- */
 305
 306 static int saa7185_probe(struct i2c_client *client,
 307                         const struct i2c_device_id *id)
 308 {
 309         int i;
 310         struct saa7185 *encoder;
 311         struct v4l2_subdev *sd;
 312
 313         /* Check if the adapter supports the needed features */
 314         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 315                 return -ENODEV;
 316
 317         v4l_info(client, "chip found @ 0x%x (%s)\n",
 318                         client->addr << 1, client->adapter->name);
 319
 320         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 321         if (encoder == NULL)
 322                 return -ENOMEM;
 323         encoder->norm = V4L2_STD_NTSC;
 324         sd = &encoder->sd;
 325         v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 326
 327         i = saa7185_write_block(sd, init_common, sizeof(init_common));
 328         if (i >= 0)
 329                 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 330         if (i < 0)
 331                 v4l2_dbg(1, debug, sd, "init error %d\n", i);
 332         else
 333                 v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 334                                 saa7185_read(sd) >> 5);
 335         return 0;
 336 }
 337
 338 static int saa7185_remove(struct i2c_client *client)
 339 {
 340         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 341         struct saa7185 *encoder = to_saa7185(sd);
 342
 343         v4l2_device_unregister_subdev(sd);
 344         /* SW: output off is active */
 345         saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 346         return 0;
 347 }
 348
 349 /* ----------------------------------------------------------------------- */
 350
 351 static const struct i2c_device_id saa7185_id[] = {
 352         { "saa7185", 0 },
 353         { }
 354 };
 355 MODULE_DEVICE_TABLE(i2c, saa7185_id);
 356
 357 static struct i2c_driver saa7185_driver = {
 358         .driver = {
 359                 .name   = "saa7185",
 360         },
 361         .probe          = saa7185_probe,
 362         .remove         = saa7185_remove,
 363         .id_table       = saa7185_id,
 364 };
 365
 366 module_i2c_driver(saa7185_driver);