release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/video/adv7175.c

   1 /*
   2  *  adv7175 - adv7175a video encoder driver version 0.0.3
   3  *
   4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   6  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   7  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   8  *
   9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10  *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
  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/i2c-id.h>
  34 #include <linux/videodev2.h>
  35 #include <media/v4l2-device.h>
  36 #include <media/v4l2-chip-ident.h>
  37 #include <media/v4l2-i2c-drv.h>
  38
  39 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  40 MODULE_AUTHOR("Dave Perks");
  41 MODULE_LICENSE("GPL");
  42
  43 #define   I2C_ADV7175        0xd4
  44 #define   I2C_ADV7176        0x54
  45
  46
  47 static int debug;
  48 module_param(debug, int, 0);
  49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  50
  51 /* ----------------------------------------------------------------------- */
  52
  53 struct adv7175 {
  54         struct v4l2_subdev sd;
  55         v4l2_std_id norm;
  56         int input;
  57 };
  58
  59 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
  60 {
  61         return container_of(sd, struct adv7175, sd);
  62 }
  63
  64 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  65
  66 /* ----------------------------------------------------------------------- */
  67
  68 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  69 {
  70         struct i2c_client *client = v4l2_get_subdevdata(sd);
  71
  72         return i2c_smbus_write_byte_data(client, reg, value);
  73 }
  74
  75 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
  76 {
  77         struct i2c_client *client = v4l2_get_subdevdata(sd);
  78
  79         return i2c_smbus_read_byte_data(client, reg);
  80 }
  81
  82 static int adv7175_write_block(struct v4l2_subdev *sd,
  83                      const u8 *data, unsigned int len)
  84 {
  85         struct i2c_client *client = v4l2_get_subdevdata(sd);
  86         int ret = -1;
  87         u8 reg;
  88
  89         /* the adv7175 has an autoincrement function, use it if
  90          * the adapter understands raw I2C */
  91         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  92                 /* do raw I2C, not smbus compatible */
  93                 u8 block_data[32];
  94                 int block_len;
  95
  96                 while (len >= 2) {
  97                         block_len = 0;
  98                         block_data[block_len++] = reg = data[0];
  99                         do {
 100                                 block_data[block_len++] = data[1];
 101                                 reg++;
 102                                 len -= 2;
 103                                 data += 2;
 104                         } while (len >= 2 && data[0] == reg && block_len < 32);
 105                         ret = i2c_master_send(client, block_data, block_len);
 106                         if (ret < 0)
 107                                 break;
 108                 }
 109         } else {
 110                 /* do some slow I2C emulation kind of thing */
 111                 while (len >= 2) {
 112                         reg = *data++;
 113                         ret = adv7175_write(sd, reg, *data++);
 114                         if (ret < 0)
 115                                 break;
 116                         len -= 2;
 117                 }
 118         }
 119
 120         return ret;
 121 }
 122
 123 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
 124 {
 125         /* for some reason pass_through NTSC needs
 126          * a different sub-carrier freq to remain stable. */
 127         if (pass_through)
 128                 adv7175_write(sd, 0x02, 0x00);
 129         else
 130                 adv7175_write(sd, 0x02, 0x55);
 131
 132         adv7175_write(sd, 0x03, 0x55);
 133         adv7175_write(sd, 0x04, 0x55);
 134         adv7175_write(sd, 0x05, 0x25);
 135 }
 136
 137 /* ----------------------------------------------------------------------- */
 138 /* Output filter:  S-Video  Composite */
 139
 140 #define MR050       0x11        /* 0x09 */
 141 #define MR060       0x14        /* 0x0c */
 142
 143 /* ----------------------------------------------------------------------- */
 144
 145 #define TR0MODE     0x46
 146 #define TR0RST      0x80
 147
 148 #define TR1CAPT     0x80
 149 #define TR1PLAY     0x00
 150
 151 static const unsigned char init_common[] = {
 152
 153         0x00, MR050,            /* MR0, PAL enabled */
 154         0x01, 0x00,             /* MR1 */
 155         0x02, 0x0c,             /* subc. freq. */
 156         0x03, 0x8c,             /* subc. freq. */
 157         0x04, 0x79,             /* subc. freq. */
 158         0x05, 0x26,             /* subc. freq. */
 159         0x06, 0x40,             /* subc. phase */
 160
 161         0x07, TR0MODE,          /* TR0, 16bit */
 162         0x08, 0x21,             /*  */
 163         0x09, 0x00,             /*  */
 164         0x0a, 0x00,             /*  */
 165         0x0b, 0x00,             /*  */
 166         0x0c, TR1CAPT,          /* TR1 */
 167         0x0d, 0x4f,             /* MR2 */
 168         0x0e, 0x00,             /*  */
 169         0x0f, 0x00,             /*  */
 170         0x10, 0x00,             /*  */
 171         0x11, 0x00,             /*  */
 172 };
 173
 174 static const unsigned char init_pal[] = {
 175         0x00, MR050,            /* MR0, PAL enabled */
 176         0x01, 0x00,             /* MR1 */
 177         0x02, 0x0c,             /* subc. freq. */
 178         0x03, 0x8c,             /* subc. freq. */
 179         0x04, 0x79,             /* subc. freq. */
 180         0x05, 0x26,             /* subc. freq. */
 181         0x06, 0x40,             /* subc. phase */
 182 };
 183
 184 static const unsigned char init_ntsc[] = {
 185         0x00, MR060,            /* MR0, NTSC enabled */
 186         0x01, 0x00,             /* MR1 */
 187         0x02, 0x55,             /* subc. freq. */
 188         0x03, 0x55,             /* subc. freq. */
 189         0x04, 0x55,             /* subc. freq. */
 190         0x05, 0x25,             /* subc. freq. */
 191         0x06, 0x1a,             /* subc. phase */
 192 };
 193
 194 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
 195 {
 196         /* This is just for testing!!! */
 197         adv7175_write_block(sd, init_common, sizeof(init_common));
 198         adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 199         adv7175_write(sd, 0x07, TR0MODE);
 200         return 0;
 201 }
 202
 203 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 204 {
 205         struct adv7175 *encoder = to_adv7175(sd);
 206
 207         if (std & V4L2_STD_NTSC) {
 208                 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
 209                 if (encoder->input == 0)
 210                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 211                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 212                 adv7175_write(sd, 0x07, TR0MODE);
 213         } else if (std & V4L2_STD_PAL) {
 214                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 215                 if (encoder->input == 0)
 216                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 217                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 218                 adv7175_write(sd, 0x07, TR0MODE);
 219         } else if (std & V4L2_STD_SECAM) {
 220                 /* This is an attempt to convert
 221                  * SECAM->PAL (typically it does not work
 222                  * due to genlock: when decoder is in SECAM
 223                  * and encoder in in PAL the subcarrier can
 224                  * not be syncronized with horizontal
 225                  * quency) */
 226                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 227                 if (encoder->input == 0)
 228                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 229                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 230                 adv7175_write(sd, 0x07, TR0MODE);
 231         } else {
 232                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 233                                 (unsigned long long)std);
 234                 return -EINVAL;
 235         }
 236         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 237         encoder->norm = std;
 238         return 0;
 239 }
 240
 241 static int adv7175_s_routing(struct v4l2_subdev *sd,
 242                              u32 input, u32 output, u32 config)
 243 {
 244         struct adv7175 *encoder = to_adv7175(sd);
 245
 246         /* RJ: input = 0: input is from decoder
 247            input = 1: input is from ZR36060
 248            input = 2: color bar */
 249
 250         switch (input) {
 251         case 0:
 252                 adv7175_write(sd, 0x01, 0x00);
 253
 254                 if (encoder->norm & V4L2_STD_NTSC)
 255                         set_subcarrier_freq(sd, 1);
 256
 257                 adv7175_write(sd, 0x0c, TR1CAPT);       /* TR1 */
 258                 if (encoder->norm & V4L2_STD_SECAM)
 259                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 260                 else
 261                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 262                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 263                 adv7175_write(sd, 0x07, TR0MODE);
 264                 /*udelay(10);*/
 265                 break;
 266
 267         case 1:
 268                 adv7175_write(sd, 0x01, 0x00);
 269
 270                 if (encoder->norm & V4L2_STD_NTSC)
 271                         set_subcarrier_freq(sd, 0);
 272
 273                 adv7175_write(sd, 0x0c, TR1PLAY);       /* TR1 */
 274                 adv7175_write(sd, 0x0d, 0x49);
 275                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 276                 adv7175_write(sd, 0x07, TR0MODE);
 277                 /* udelay(10); */
 278                 break;
 279
 280         case 2:
 281                 adv7175_write(sd, 0x01, 0x80);
 282
 283                 if (encoder->norm & V4L2_STD_NTSC)
 284                         set_subcarrier_freq(sd, 0);
 285
 286                 adv7175_write(sd, 0x0d, 0x49);
 287                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 288                 adv7175_write(sd, 0x07, TR0MODE);
 289                 /* udelay(10); */
 290                 break;
 291
 292         default:
 293                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 294                 return -EINVAL;
 295         }
 296         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 297         encoder->input = input;
 298         return 0;
 299 }
 300
 301 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 302 {
 303         struct i2c_client *client = v4l2_get_subdevdata(sd);
 304
 305         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
 306 }
 307
 308 /* ----------------------------------------------------------------------- */
 309
 310 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
 311         .g_chip_ident = adv7175_g_chip_ident,
 312         .init = adv7175_init,
 313 };
 314
 315 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 316         .s_std_output = adv7175_s_std_output,
 317         .s_routing = adv7175_s_routing,
 318 };
 319
 320 static const struct v4l2_subdev_ops adv7175_ops = {
 321         .core = &adv7175_core_ops,
 322         .video = &adv7175_video_ops,
 323 };
 324
 325 /* ----------------------------------------------------------------------- */
 326
 327 static int adv7175_probe(struct i2c_client *client,
 328                         const struct i2c_device_id *id)
 329 {
 330         int i;
 331         struct adv7175 *encoder;
 332         struct v4l2_subdev *sd;
 333
 334         /* Check if the adapter supports the needed features */
 335         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 336                 return -ENODEV;
 337
 338         v4l_info(client, "chip found @ 0x%x (%s)\n",
 339                         client->addr << 1, client->adapter->name);
 340
 341         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 342         if (encoder == NULL)
 343                 return -ENOMEM;
 344         sd = &encoder->sd;
 345         v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 346         encoder->norm = V4L2_STD_NTSC;
 347         encoder->input = 0;
 348
 349         i = adv7175_write_block(sd, init_common, sizeof(init_common));
 350         if (i >= 0) {
 351                 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 352                 i = adv7175_write(sd, 0x07, TR0MODE);
 353                 i = adv7175_read(sd, 0x12);
 354                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 355         }
 356         if (i < 0)
 357                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 358         return 0;
 359 }
 360
 361 static int adv7175_remove(struct i2c_client *client)
 362 {
 363         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 364
 365         v4l2_device_unregister_subdev(sd);
 366         kfree(to_adv7175(sd));
 367         return 0;
 368 }
 369
 370 /* ----------------------------------------------------------------------- */
 371
 372 static const struct i2c_device_id adv7175_id[] = {
 373         { "adv7175", 0 },
 374         { "adv7176", 0 },
 375         { }
 376 };
 377 MODULE_DEVICE_TABLE(i2c, adv7175_id);
 378
 379 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 380         .name = "adv7175",
 381         .probe = adv7175_probe,
 382         .remove = adv7175_remove,
 383         .id_table = adv7175_id,
 384 };