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/videodev2.h>
  34 #include <media/v4l2-device.h>
  35 #include <media/v4l2-chip-ident.h>
  36 #include <media/v4l2-i2c-drv.h>
  37
  38 MODULE_DESCRIPTION("Philips SAA7185 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
  49 struct saa7185 {
  50         struct v4l2_subdev sd;
  51         unsigned char reg[128];
  52
  53         v4l2_std_id norm;
  54 };
  55
  56 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  57 {
  58         return container_of(sd, struct saa7185, sd);
  59 }
  60
  61 /* ----------------------------------------------------------------------- */
  62
  63 static inline int saa7185_read(struct v4l2_subdev *sd)
  64 {
  65         struct i2c_client *client = v4l2_get_subdevdata(sd);
  66
  67         return i2c_smbus_read_byte(client);
  68 }
  69
  70 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  71 {
  72         struct i2c_client *client = v4l2_get_subdevdata(sd);
  73         struct saa7185 *encoder = to_saa7185(sd);
  74
  75         v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  76         encoder->reg[reg] = value;
  77         return i2c_smbus_write_byte_data(client, reg, value);
  78 }
  79
  80 static int saa7185_write_block(struct v4l2_subdev *sd,
  81                 const u8 *data, unsigned int len)
  82 {
  83         struct i2c_client *client = v4l2_get_subdevdata(sd);
  84         struct saa7185 *encoder = to_saa7185(sd);
  85         int ret = -1;
  86         u8 reg;
  87
  88         /* the adv7175 has an autoincrement function, use it if
  89          * the adapter understands raw I2C */
  90         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  91                 /* do raw I2C, not smbus compatible */
  92                 u8 block_data[32];
  93                 int block_len;
  94
  95                 while (len >= 2) {
  96                         block_len = 0;
  97                         block_data[block_len++] = reg = data[0];
  98                         do {
  99                                 block_data[block_len++] =
 100                                     encoder->reg[reg++] = data[1];
 101                                 len -= 2;
 102                                 data += 2;
 103                         } while (len >= 2 && data[0] == reg && block_len < 32);
 104                         ret = i2c_master_send(client, block_data, block_len);
 105                         if (ret < 0)
 106                                 break;
 107                 }
 108         } else {
 109                 /* do some slow I2C emulation kind of thing */
 110                 while (len >= 2) {
 111                         reg = *data++;
 112                         ret = saa7185_write(sd, reg, *data++);
 113                         if (ret < 0)
 114                                 break;
 115                         len -= 2;
 116                 }
 117         }
 118
 119         return ret;
 120 }
 121
 122 /* ----------------------------------------------------------------------- */
 123
 124 static const unsigned char init_common[] = {
 125         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 126                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 127
 128         0x42, 0x6b,             /* OVLY0=107 */
 129         0x43, 0x00,             /* OVLU0=0     white */
 130         0x44, 0x00,             /* OVLV0=0   */
 131         0x45, 0x22,             /* OVLY1=34  */
 132         0x46, 0xac,             /* OVLU1=172   yellow */
 133         0x47, 0x0e,             /* OVLV1=14  */
 134         0x48, 0x03,             /* OVLY2=3   */
 135         0x49, 0x1d,             /* OVLU2=29    cyan */
 136         0x4a, 0xac,             /* OVLV2=172 */
 137         0x4b, 0xf0,             /* OVLY3=240 */
 138         0x4c, 0xc8,             /* OVLU3=200   green */
 139         0x4d, 0xb9,             /* OVLV3=185 */
 140         0x4e, 0xd4,             /* OVLY4=212 */
 141         0x4f, 0x38,             /* OVLU4=56    magenta */
 142         0x50, 0x47,             /* OVLV4=71  */
 143         0x51, 0xc1,             /* OVLY5=193 */
 144         0x52, 0xe3,             /* OVLU5=227   red */
 145         0x53, 0x54,             /* OVLV5=84  */
 146         0x54, 0xa3,             /* OVLY6=163 */
 147         0x55, 0x54,             /* OVLU6=84    blue */
 148         0x56, 0xf2,             /* OVLV6=242 */
 149         0x57, 0x90,             /* OVLY7=144 */
 150         0x58, 0x00,             /* OVLU7=0     black */
 151         0x59, 0x00,             /* OVLV7=0   */
 152
 153         0x5a, 0x00,             /* CHPS=0    */
 154         0x5b, 0x76,             /* GAINU=118 */
 155         0x5c, 0xa5,             /* GAINV=165 */
 156         0x5d, 0x3c,             /* BLCKL=60  */
 157         0x5e, 0x3a,             /* BLNNL=58  */
 158         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 159         0x60, 0x00,             /* NULL      */
 160
 161         /* 0x61 - 0x66 set according to norm */
 162
 163         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 164         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 165         0x69, 0x00,             /* 0 : caption 1st byte even field */
 166         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 167
 168         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 169         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 170                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 171         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 172
 173         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 174                                  * least for PAL */
 175         0x6f, 0x00,             /* HTRIG upper bits */
 176         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 177
 178         /* The following should not be needed */
 179
 180         0x71, 0x15,             /* BMRQ=0x115 */
 181         0x72, 0x90,             /* EMRQ=0x690 */
 182         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 183         0x74, 0x00,             /* NULL       */
 184         0x75, 0x00,             /* NULL       */
 185         0x76, 0x00,             /* NULL       */
 186         0x77, 0x15,             /* BRCV=0x115 */
 187         0x78, 0x90,             /* ERCV=0x690 */
 188         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 189
 190         /* Field length controls */
 191
 192         0x7a, 0x70,             /* FLC=0 */
 193
 194         /* The following should not be needed if SBLN = 1 */
 195
 196         0x7b, 0x16,             /* FAL=22 */
 197         0x7c, 0x35,             /* LAL=244 */
 198         0x7d, 0x20,             /* LAL=244, FAL=22 */
 199 };
 200
 201 static const unsigned char init_pal[] = {
 202         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 203                                  * YGS=1, INPI=0, DOWN=0 */
 204         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 205         0x63, 0xcb,             /* FSC0 */
 206         0x64, 0x8a,             /* FSC1 */
 207         0x65, 0x09,             /* FSC2 */
 208         0x66, 0x2a,             /* FSC3 */
 209 };
 210
 211 static const unsigned char init_ntsc[] = {
 212         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 213                                  * YGS=1, INPI=0, DOWN=0 */
 214         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 215         0x63, 0x1f,             /* FSC0 */
 216         0x64, 0x7c,             /* FSC1 */
 217         0x65, 0xf0,             /* FSC2 */
 218         0x66, 0x21,             /* FSC3 */
 219 };
 220
 221
 222 static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 223 {
 224         struct saa7185 *encoder = to_saa7185(sd);
 225
 226         saa7185_write_block(sd, init_common, sizeof(init_common));
 227         if (encoder->norm & V4L2_STD_NTSC)
 228                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 229         else
 230                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 231         return 0;
 232 }
 233
 234 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 235 {
 236         struct saa7185 *encoder = to_saa7185(sd);
 237
 238         if (std & V4L2_STD_NTSC)
 239                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 240         else if (std & V4L2_STD_PAL)
 241                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 242         else
 243                 return -EINVAL;
 244         encoder->norm = std;
 245         return 0;
 246 }
 247
 248 static int saa7185_s_routing(struct v4l2_subdev *sd,
 249                              u32 input, u32 output, u32 config)
 250 {
 251         struct saa7185 *encoder = to_saa7185(sd);
 252
 253         /* RJ: input = 0: input is from SA7111
 254          input = 1: input is from ZR36060 */
 255
 256         switch (input) {
 257         case 0:
 258                 /* turn off colorbar */
 259                 saa7185_write(sd, 0x3a, 0x0f);
 260                 /* Switch RTCE to 1 */
 261                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 262                 saa7185_write(sd, 0x6e, 0x01);
 263                 break;
 264
 265         case 1:
 266                 /* turn off colorbar */
 267                 saa7185_write(sd, 0x3a, 0x0f);
 268                 /* Switch RTCE to 0 */
 269                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 270                 /* SW: a slight sync problem... */
 271                 saa7185_write(sd, 0x6e, 0x00);
 272                 break;
 273
 274         case 2:
 275                 /* turn on colorbar */
 276                 saa7185_write(sd, 0x3a, 0x8f);
 277                 /* Switch RTCE to 0 */
 278                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 279                 /* SW: a slight sync problem... */
 280                 saa7185_write(sd, 0x6e, 0x01);
 281                 break;
 282
 283         default:
 284                 return -EINVAL;
 285         }
 286         return 0;
 287 }
 288
 289 static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 290 {
 291         struct i2c_client *client = v4l2_get_subdevdata(sd);
 292
 293         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0);
 294 }
 295
 296 /* ----------------------------------------------------------------------- */
 297
 298 static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 299         .g_chip_ident = saa7185_g_chip_ident,
 300         .init = saa7185_init,
 301 };
 302
 303 static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 304         .s_std_output = saa7185_s_std_output,
 305         .s_routing = saa7185_s_routing,
 306 };
 307
 308 static const struct v4l2_subdev_ops saa7185_ops = {
 309         .core = &saa7185_core_ops,
 310         .video = &saa7185_video_ops,
 311 };
 312
 313
 314 /* ----------------------------------------------------------------------- */
 315
 316 static int saa7185_probe(struct i2c_client *client,
 317                         const struct i2c_device_id *id)
 318 {
 319         int i;
 320         struct saa7185 *encoder;
 321         struct v4l2_subdev *sd;
 322
 323         /* Check if the adapter supports the needed features */
 324         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 325                 return -ENODEV;
 326
 327         v4l_info(client, "chip found @ 0x%x (%s)\n",
 328                         client->addr << 1, client->adapter->name);
 329
 330         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 331         if (encoder == NULL)
 332                 return -ENOMEM;
 333         encoder->norm = V4L2_STD_NTSC;
 334         sd = &encoder->sd;
 335         v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 336
 337         i = saa7185_write_block(sd, init_common, sizeof(init_common));
 338         if (i >= 0)
 339                 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 340         if (i < 0)
 341                 v4l2_dbg(1, debug, sd, "init error %d\n", i);
 342         else
 343                 v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 344                                 saa7185_read(sd) >> 5);
 345         return 0;
 346 }
 347
 348 static int saa7185_remove(struct i2c_client *client)
 349 {
 350         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 351         struct saa7185 *encoder = to_saa7185(sd);
 352
 353         v4l2_device_unregister_subdev(sd);
 354         /* SW: output off is active */
 355         saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 356         kfree(encoder);
 357         return 0;
 358 }
 359
 360 /* ----------------------------------------------------------------------- */
 361
 362 static const struct i2c_device_id saa7185_id[] = {
 363         { "saa7185", 0 },
 364         { }
 365 };
 366 MODULE_DEVICE_TABLE(i2c, saa7185_id);
 367
 368 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 369         .name = "saa7185",
 370         .probe = saa7185_probe,
 371         .remove = saa7185_remove,
 372         .id_table = saa7185_id,
 373 };