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/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("Analog Devices ADV7175 video encoder driver");
  39 MODULE_AUTHOR("Dave Perks");
  40 MODULE_LICENSE("GPL");
  41
  42 #define   I2C_ADV7175        0xd4
  43 #define   I2C_ADV7176        0x54
  44
  45
  46 static int debug;
  47 module_param(debug, int, 0);
  48 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  49
  50 /* ----------------------------------------------------------------------- */
  51
  52 struct adv7175 {
  53         struct v4l2_subdev sd;
  54         v4l2_std_id norm;
  55         int input;
  56 };
  57
  58 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
  59 {
  60         return container_of(sd, struct adv7175, sd);
  61 }
  62
  63 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  64
  65 /* ----------------------------------------------------------------------- */
  66
  67 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  68 {
  69         struct i2c_client *client = v4l2_get_subdevdata(sd);
  70
  71         return i2c_smbus_write_byte_data(client, reg, value);
  72 }
  73
  74 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
  75 {
  76         struct i2c_client *client = v4l2_get_subdevdata(sd);
  77
  78         return i2c_smbus_read_byte_data(client, reg);
  79 }
  80
  81 static int adv7175_write_block(struct v4l2_subdev *sd,
  82                      const u8 *data, unsigned int len)
  83 {
  84         struct i2c_client *client = v4l2_get_subdevdata(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++] = data[1];
 100                                 reg++;
 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 = adv7175_write(sd, reg, *data++);
 113                         if (ret < 0)
 114                                 break;
 115                         len -= 2;
 116                 }
 117         }
 118
 119         return ret;
 120 }
 121
 122 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
 123 {
 124         /* for some reason pass_through NTSC needs
 125          * a different sub-carrier freq to remain stable. */
 126         if (pass_through)
 127                 adv7175_write(sd, 0x02, 0x00);
 128         else
 129                 adv7175_write(sd, 0x02, 0x55);
 130
 131         adv7175_write(sd, 0x03, 0x55);
 132         adv7175_write(sd, 0x04, 0x55);
 133         adv7175_write(sd, 0x05, 0x25);
 134 }
 135
 136 /* ----------------------------------------------------------------------- */
 137 /* Output filter:  S-Video  Composite */
 138
 139 #define MR050       0x11        /* 0x09 */
 140 #define MR060       0x14        /* 0x0c */
 141
 142 /* ----------------------------------------------------------------------- */
 143
 144 #define TR0MODE     0x46
 145 #define TR0RST      0x80
 146
 147 #define TR1CAPT     0x80
 148 #define TR1PLAY     0x00
 149
 150 static const unsigned char init_common[] = {
 151
 152         0x00, MR050,            /* MR0, PAL enabled */
 153         0x01, 0x00,             /* MR1 */
 154         0x02, 0x0c,             /* subc. freq. */
 155         0x03, 0x8c,             /* subc. freq. */
 156         0x04, 0x79,             /* subc. freq. */
 157         0x05, 0x26,             /* subc. freq. */
 158         0x06, 0x40,             /* subc. phase */
 159
 160         0x07, TR0MODE,          /* TR0, 16bit */
 161         0x08, 0x21,             /*  */
 162         0x09, 0x00,             /*  */
 163         0x0a, 0x00,             /*  */
 164         0x0b, 0x00,             /*  */
 165         0x0c, TR1CAPT,          /* TR1 */
 166         0x0d, 0x4f,             /* MR2 */
 167         0x0e, 0x00,             /*  */
 168         0x0f, 0x00,             /*  */
 169         0x10, 0x00,             /*  */
 170         0x11, 0x00,             /*  */
 171 };
 172
 173 static const unsigned char init_pal[] = {
 174         0x00, MR050,            /* MR0, PAL enabled */
 175         0x01, 0x00,             /* MR1 */
 176         0x02, 0x0c,             /* subc. freq. */
 177         0x03, 0x8c,             /* subc. freq. */
 178         0x04, 0x79,             /* subc. freq. */
 179         0x05, 0x26,             /* subc. freq. */
 180         0x06, 0x40,             /* subc. phase */
 181 };
 182
 183 static const unsigned char init_ntsc[] = {
 184         0x00, MR060,            /* MR0, NTSC enabled */
 185         0x01, 0x00,             /* MR1 */
 186         0x02, 0x55,             /* subc. freq. */
 187         0x03, 0x55,             /* subc. freq. */
 188         0x04, 0x55,             /* subc. freq. */
 189         0x05, 0x25,             /* subc. freq. */
 190         0x06, 0x1a,             /* subc. phase */
 191 };
 192
 193 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
 194 {
 195         /* This is just for testing!!! */
 196         adv7175_write_block(sd, init_common, sizeof(init_common));
 197         adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 198         adv7175_write(sd, 0x07, TR0MODE);
 199         return 0;
 200 }
 201
 202 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 203 {
 204         struct adv7175 *encoder = to_adv7175(sd);
 205
 206         if (std & V4L2_STD_NTSC) {
 207                 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
 208                 if (encoder->input == 0)
 209                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 210                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 211                 adv7175_write(sd, 0x07, TR0MODE);
 212         } else if (std & V4L2_STD_PAL) {
 213                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 214                 if (encoder->input == 0)
 215                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 216                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 217                 adv7175_write(sd, 0x07, TR0MODE);
 218         } else if (std & V4L2_STD_SECAM) {
 219                 /* This is an attempt to convert
 220                  * SECAM->PAL (typically it does not work
 221                  * due to genlock: when decoder is in SECAM
 222                  * and encoder in in PAL the subcarrier can
 223                  * not be syncronized with horizontal
 224                  * quency) */
 225                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 226                 if (encoder->input == 0)
 227                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 228                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 229                 adv7175_write(sd, 0x07, TR0MODE);
 230         } else {
 231                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 232                                 (unsigned long long)std);
 233                 return -EINVAL;
 234         }
 235         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 236         encoder->norm = std;
 237         return 0;
 238 }
 239
 240 static int adv7175_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 241 {
 242         struct adv7175 *encoder = to_adv7175(sd);
 243
 244         /* RJ: route->input = 0: input is from decoder
 245            route->input = 1: input is from ZR36060
 246            route->input = 2: color bar */
 247
 248         switch (route->input) {
 249         case 0:
 250                 adv7175_write(sd, 0x01, 0x00);
 251
 252                 if (encoder->norm & V4L2_STD_NTSC)
 253                         set_subcarrier_freq(sd, 1);
 254
 255                 adv7175_write(sd, 0x0c, TR1CAPT);       /* TR1 */
 256                 if (encoder->norm & V4L2_STD_SECAM)
 257                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 258                 else
 259                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 260                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 261                 adv7175_write(sd, 0x07, TR0MODE);
 262                 /*udelay(10);*/
 263                 break;
 264
 265         case 1:
 266                 adv7175_write(sd, 0x01, 0x00);
 267
 268                 if (encoder->norm & V4L2_STD_NTSC)
 269                         set_subcarrier_freq(sd, 0);
 270
 271                 adv7175_write(sd, 0x0c, TR1PLAY);       /* TR1 */
 272                 adv7175_write(sd, 0x0d, 0x49);
 273                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 274                 adv7175_write(sd, 0x07, TR0MODE);
 275                 /* udelay(10); */
 276                 break;
 277
 278         case 2:
 279                 adv7175_write(sd, 0x01, 0x80);
 280
 281                 if (encoder->norm & V4L2_STD_NTSC)
 282                         set_subcarrier_freq(sd, 0);
 283
 284                 adv7175_write(sd, 0x0d, 0x49);
 285                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 286                 adv7175_write(sd, 0x07, TR0MODE);
 287                 /* udelay(10); */
 288                 break;
 289
 290         default:
 291                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", route->input);
 292                 return -EINVAL;
 293         }
 294         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[route->input]);
 295         encoder->input = route->input;
 296         return 0;
 297 }
 298
 299 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 300 {
 301         struct i2c_client *client = v4l2_get_subdevdata(sd);
 302
 303         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
 304 }
 305
 306 /* ----------------------------------------------------------------------- */
 307
 308 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
 309         .g_chip_ident = adv7175_g_chip_ident,
 310         .init = adv7175_init,
 311 };
 312
 313 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 314         .s_std_output = adv7175_s_std_output,
 315         .s_routing = adv7175_s_routing,
 316 };
 317
 318 static const struct v4l2_subdev_ops adv7175_ops = {
 319         .core = &adv7175_core_ops,
 320         .video = &adv7175_video_ops,
 321 };
 322
 323 /* ----------------------------------------------------------------------- */
 324
 325 static int adv7175_probe(struct i2c_client *client,
 326                         const struct i2c_device_id *id)
 327 {
 328         int i;
 329         struct adv7175 *encoder;
 330         struct v4l2_subdev *sd;
 331
 332         /* Check if the adapter supports the needed features */
 333         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 334                 return -ENODEV;
 335
 336         v4l_info(client, "chip found @ 0x%x (%s)\n",
 337                         client->addr << 1, client->adapter->name);
 338
 339         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 340         if (encoder == NULL)
 341                 return -ENOMEM;
 342         sd = &encoder->sd;
 343         v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 344         encoder->norm = V4L2_STD_NTSC;
 345         encoder->input = 0;
 346
 347         i = adv7175_write_block(sd, init_common, sizeof(init_common));
 348         if (i >= 0) {
 349                 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 350                 i = adv7175_write(sd, 0x07, TR0MODE);
 351                 i = adv7175_read(sd, 0x12);
 352                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 353         }
 354         if (i < 0)
 355                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 356         return 0;
 357 }
 358
 359 static int adv7175_remove(struct i2c_client *client)
 360 {
 361         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 362
 363         v4l2_device_unregister_subdev(sd);
 364         kfree(to_adv7175(sd));
 365         return 0;
 366 }
 367
 368 /* ----------------------------------------------------------------------- */
 369
 370 static const struct i2c_device_id adv7175_id[] = {
 371         { "adv7175", 0 },
 372         { "adv7176", 0 },
 373         { }
 374 };
 375 MODULE_DEVICE_TABLE(i2c, adv7175_id);
 376
 377 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 378         .name = "adv7175",
 379         .probe = adv7175_probe,
 380         .remove = adv7175_remove,
 381         .id_table = adv7175_id,
 382 };