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-legacy.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 static unsigned short normal_i2c[] = { 0x88 >> 1, I2C_CLIENT_END };
  47
  48 I2C_CLIENT_INSMOD;
  49
  50 /* ----------------------------------------------------------------------- */
  51
  52 struct saa7185 {
  53         struct v4l2_subdev sd;
  54         unsigned char reg[128];
  55
  56         v4l2_std_id norm;
  57 };
  58
  59 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  60 {
  61         return container_of(sd, struct saa7185, sd);
  62 }
  63
  64 /* ----------------------------------------------------------------------- */
  65
  66 static inline int saa7185_read(struct v4l2_subdev *sd)
  67 {
  68         struct i2c_client *client = v4l2_get_subdevdata(sd);
  69
  70         return i2c_smbus_read_byte(client);
  71 }
  72
  73 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  74 {
  75         struct i2c_client *client = v4l2_get_subdevdata(sd);
  76         struct saa7185 *encoder = to_saa7185(sd);
  77
  78         v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  79         encoder->reg[reg] = value;
  80         return i2c_smbus_write_byte_data(client, reg, value);
  81 }
  82
  83 static int saa7185_write_block(struct v4l2_subdev *sd,
  84                 const u8 *data, unsigned int len)
  85 {
  86         struct i2c_client *client = v4l2_get_subdevdata(sd);
  87         struct saa7185 *encoder = to_saa7185(sd);
  88         int ret = -1;
  89         u8 reg;
  90
  91         /* the adv7175 has an autoincrement function, use it if
  92          * the adapter understands raw I2C */
  93         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  94                 /* do raw I2C, not smbus compatible */
  95                 u8 block_data[32];
  96                 int block_len;
  97
  98                 while (len >= 2) {
  99                         block_len = 0;
 100                         block_data[block_len++] = reg = data[0];
 101                         do {
 102                                 block_data[block_len++] =
 103                                     encoder->reg[reg++] = data[1];
 104                                 len -= 2;
 105                                 data += 2;
 106                         } while (len >= 2 && data[0] == reg && block_len < 32);
 107                         ret = i2c_master_send(client, block_data, block_len);
 108                         if (ret < 0)
 109                                 break;
 110                 }
 111         } else {
 112                 /* do some slow I2C emulation kind of thing */
 113                 while (len >= 2) {
 114                         reg = *data++;
 115                         ret = saa7185_write(sd, reg, *data++);
 116                         if (ret < 0)
 117                                 break;
 118                         len -= 2;
 119                 }
 120         }
 121
 122         return ret;
 123 }
 124
 125 /* ----------------------------------------------------------------------- */
 126
 127 static const unsigned char init_common[] = {
 128         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 129                                  * YUV2C=1, MY2C=1, MUV2C=1 */
 130
 131         0x42, 0x6b,             /* OVLY0=107 */
 132         0x43, 0x00,             /* OVLU0=0     white */
 133         0x44, 0x00,             /* OVLV0=0   */
 134         0x45, 0x22,             /* OVLY1=34  */
 135         0x46, 0xac,             /* OVLU1=172   yellow */
 136         0x47, 0x0e,             /* OVLV1=14  */
 137         0x48, 0x03,             /* OVLY2=3   */
 138         0x49, 0x1d,             /* OVLU2=29    cyan */
 139         0x4a, 0xac,             /* OVLV2=172 */
 140         0x4b, 0xf0,             /* OVLY3=240 */
 141         0x4c, 0xc8,             /* OVLU3=200   green */
 142         0x4d, 0xb9,             /* OVLV3=185 */
 143         0x4e, 0xd4,             /* OVLY4=212 */
 144         0x4f, 0x38,             /* OVLU4=56    magenta */
 145         0x50, 0x47,             /* OVLV4=71  */
 146         0x51, 0xc1,             /* OVLY5=193 */
 147         0x52, 0xe3,             /* OVLU5=227   red */
 148         0x53, 0x54,             /* OVLV5=84  */
 149         0x54, 0xa3,             /* OVLY6=163 */
 150         0x55, 0x54,             /* OVLU6=84    blue */
 151         0x56, 0xf2,             /* OVLV6=242 */
 152         0x57, 0x90,             /* OVLY7=144 */
 153         0x58, 0x00,             /* OVLU7=0     black */
 154         0x59, 0x00,             /* OVLV7=0   */
 155
 156         0x5a, 0x00,             /* CHPS=0    */
 157         0x5b, 0x76,             /* GAINU=118 */
 158         0x5c, 0xa5,             /* GAINV=165 */
 159         0x5d, 0x3c,             /* BLCKL=60  */
 160         0x5e, 0x3a,             /* BLNNL=58  */
 161         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 162         0x60, 0x00,             /* NULL      */
 163
 164         /* 0x61 - 0x66 set according to norm */
 165
 166         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 167         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 168         0x69, 0x00,             /* 0 : caption 1st byte even field */
 169         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 170
 171         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 172         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 173                                  * CBLF=0, ORCV2=0, PRCV2=0 */
 174         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 175
 176         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 177                                  * least for PAL */
 178         0x6f, 0x00,             /* HTRIG upper bits */
 179         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 180
 181         /* The following should not be needed */
 182
 183         0x71, 0x15,             /* BMRQ=0x115 */
 184         0x72, 0x90,             /* EMRQ=0x690 */
 185         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 186         0x74, 0x00,             /* NULL       */
 187         0x75, 0x00,             /* NULL       */
 188         0x76, 0x00,             /* NULL       */
 189         0x77, 0x15,             /* BRCV=0x115 */
 190         0x78, 0x90,             /* ERCV=0x690 */
 191         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 192
 193         /* Field length controls */
 194
 195         0x7a, 0x70,             /* FLC=0 */
 196
 197         /* The following should not be needed if SBLN = 1 */
 198
 199         0x7b, 0x16,             /* FAL=22 */
 200         0x7c, 0x35,             /* LAL=244 */
 201         0x7d, 0x20,             /* LAL=244, FAL=22 */
 202 };
 203
 204 static const unsigned char init_pal[] = {
 205         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 206                                  * YGS=1, INPI=0, DOWN=0 */
 207         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 208         0x63, 0xcb,             /* FSC0 */
 209         0x64, 0x8a,             /* FSC1 */
 210         0x65, 0x09,             /* FSC2 */
 211         0x66, 0x2a,             /* FSC3 */
 212 };
 213
 214 static const unsigned char init_ntsc[] = {
 215         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 216                                  * YGS=1, INPI=0, DOWN=0 */
 217         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 218         0x63, 0x1f,             /* FSC0 */
 219         0x64, 0x7c,             /* FSC1 */
 220         0x65, 0xf0,             /* FSC2 */
 221         0x66, 0x21,             /* FSC3 */
 222 };
 223
 224
 225 static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 226 {
 227         struct saa7185 *encoder = to_saa7185(sd);
 228
 229         saa7185_write_block(sd, init_common, sizeof(init_common));
 230         if (encoder->norm & V4L2_STD_NTSC)
 231                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 232         else
 233                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 234         return 0;
 235 }
 236
 237 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 238 {
 239         struct saa7185 *encoder = to_saa7185(sd);
 240
 241         if (std & V4L2_STD_NTSC)
 242                 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 243         else if (std & V4L2_STD_PAL)
 244                 saa7185_write_block(sd, init_pal, sizeof(init_pal));
 245         else
 246                 return -EINVAL;
 247         encoder->norm = std;
 248         return 0;
 249 }
 250
 251 static int saa7185_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 252 {
 253         struct saa7185 *encoder = to_saa7185(sd);
 254
 255         /* RJ: route->input = 0: input is from SA7111
 256          route->input = 1: input is from ZR36060 */
 257
 258         switch (route->input) {
 259         case 0:
 260                 /* turn off colorbar */
 261                 saa7185_write(sd, 0x3a, 0x0f);
 262                 /* Switch RTCE to 1 */
 263                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 264                 saa7185_write(sd, 0x6e, 0x01);
 265                 break;
 266
 267         case 1:
 268                 /* turn off colorbar */
 269                 saa7185_write(sd, 0x3a, 0x0f);
 270                 /* Switch RTCE to 0 */
 271                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 272                 /* SW: a slight sync problem... */
 273                 saa7185_write(sd, 0x6e, 0x00);
 274                 break;
 275
 276         case 2:
 277                 /* turn on colorbar */
 278                 saa7185_write(sd, 0x3a, 0x8f);
 279                 /* Switch RTCE to 0 */
 280                 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 281                 /* SW: a slight sync problem... */
 282                 saa7185_write(sd, 0x6e, 0x01);
 283                 break;
 284
 285         default:
 286                 return -EINVAL;
 287         }
 288         return 0;
 289 }
 290
 291 static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 292 {
 293         struct i2c_client *client = v4l2_get_subdevdata(sd);
 294
 295         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0);
 296 }
 297
 298 static int saa7185_command(struct i2c_client *client, unsigned cmd, void *arg)
 299 {
 300         return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
 301 }
 302
 303 /* ----------------------------------------------------------------------- */
 304
 305 static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 306         .g_chip_ident = saa7185_g_chip_ident,
 307         .init = saa7185_init,
 308 };
 309
 310 static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 311         .s_std_output = saa7185_s_std_output,
 312         .s_routing = saa7185_s_routing,
 313 };
 314
 315 static const struct v4l2_subdev_ops saa7185_ops = {
 316         .core = &saa7185_core_ops,
 317         .video = &saa7185_video_ops,
 318 };
 319
 320
 321 /* ----------------------------------------------------------------------- */
 322
 323 static int saa7185_probe(struct i2c_client *client,
 324                         const struct i2c_device_id *id)
 325 {
 326         int i;
 327         struct saa7185 *encoder;
 328         struct v4l2_subdev *sd;
 329
 330         /* Check if the adapter supports the needed features */
 331         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 332                 return -ENODEV;
 333
 334         v4l_info(client, "chip found @ 0x%x (%s)\n",
 335                         client->addr << 1, client->adapter->name);
 336
 337         encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 338         if (encoder == NULL)
 339                 return -ENOMEM;
 340         encoder->norm = V4L2_STD_NTSC;
 341         sd = &encoder->sd;
 342         v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 343
 344         i = saa7185_write_block(sd, init_common, sizeof(init_common));
 345         if (i >= 0)
 346                 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 347         if (i < 0)
 348                 v4l2_dbg(1, debug, sd, "init error %d\n", i);
 349         else
 350                 v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 351                                 saa7185_read(sd) >> 5);
 352         return 0;
 353 }
 354
 355 static int saa7185_remove(struct i2c_client *client)
 356 {
 357         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 358         struct saa7185 *encoder = to_saa7185(sd);
 359
 360         v4l2_device_unregister_subdev(sd);
 361         /* SW: output off is active */
 362         saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 363         kfree(encoder);
 364         return 0;
 365 }
 366
 367 /* ----------------------------------------------------------------------- */
 368
 369 static const struct i2c_device_id saa7185_id[] = {
 370         { "saa7185", 0 },
 371         { }
 372 };
 373 MODULE_DEVICE_TABLE(i2c, saa7185_id);
 374
 375 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 376         .name = "saa7185",
 377         .driverid = I2C_DRIVERID_SAA7185B,
 378         .command = saa7185_command,
 379         .probe = saa7185_probe,
 380         .remove = saa7185_remove,
 381         .id_table = saa7185_id,
 382 };