drivers/media/video/adv7170.c

   1 /*
   2  * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
   3  *
   4  * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
   5  *
   6  * Based on adv7176 driver by:
   7  *
   8  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   9  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
  10  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
  11  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
  12  *
  13  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  14  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/ioctl.h>
  34 #include <asm/uaccess.h>
  35 #include <linux/i2c.h>
  36 #include <linux/i2c-id.h>
  37 #include <linux/videodev.h>
  38 #include <linux/video_encoder.h>
  39 #include <media/v4l2-common.h>
  40 #include <media/v4l2-i2c-drv-legacy.h>
  41
  42 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  43 MODULE_AUTHOR("Maxim Yevtyushkin");
  44 MODULE_LICENSE("GPL");
  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 adv7170 {
  53         unsigned char reg[128];
  54
  55         int norm;
  56         int input;
  57         int enable;
  58         int bright;
  59         int contrast;
  60         int hue;
  61         int sat;
  62 };
  63
  64 static char *inputs[] = { "pass_through", "play_back" };
  65 static char *norms[] = { "PAL", "NTSC" };
  66
  67 /* ----------------------------------------------------------------------- */
  68
  69 static inline int adv7170_write(struct i2c_client *client, u8 reg, u8 value)
  70 {
  71         struct adv7170 *encoder = i2c_get_clientdata(client);
  72
  73         encoder->reg[reg] = value;
  74         return i2c_smbus_write_byte_data(client, reg, value);
  75 }
  76
  77 static inline int adv7170_read(struct i2c_client *client, u8 reg)
  78 {
  79         return i2c_smbus_read_byte_data(client, reg);
  80 }
  81
  82 static int adv7170_write_block(struct i2c_client *client,
  83                      const u8 *data, unsigned int len)
  84 {
  85         int ret = -1;
  86         u8 reg;
  87
  88         /* the adv7170 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                 struct adv7170 *encoder = i2c_get_clientdata(client);
  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++] =
 101                                     encoder->reg[reg++] = data[1];
 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 = adv7170_write(client, reg, *data++);
 114                         if (ret < 0)
 115                                 break;
 116                         len -= 2;
 117                 }
 118         }
 119         return ret;
 120 }
 121
 122 /* ----------------------------------------------------------------------- */
 123
 124 #define TR0MODE     0x4c
 125 #define TR0RST      0x80
 126
 127 #define TR1CAPT     0x00
 128 #define TR1PLAY     0x00
 129
 130 static const unsigned char init_NTSC[] = {
 131         0x00, 0x10,             // MR0
 132         0x01, 0x20,             // MR1
 133         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 134         0x03, 0x80,             // MR3
 135         0x04, 0x30,             // MR4
 136         0x05, 0x00,             // Reserved
 137         0x06, 0x00,             // Reserved
 138         0x07, TR0MODE,          // TM0
 139         0x08, TR1CAPT,          // TM1
 140         0x09, 0x16,             // Fsc0
 141         0x0a, 0x7c,             // Fsc1
 142         0x0b, 0xf0,             // Fsc2
 143         0x0c, 0x21,             // Fsc3
 144         0x0d, 0x00,             // Subcarrier Phase
 145         0x0e, 0x00,             // Closed Capt. Ext 0
 146         0x0f, 0x00,             // Closed Capt. Ext 1
 147         0x10, 0x00,             // Closed Capt. 0
 148         0x11, 0x00,             // Closed Capt. 1
 149         0x12, 0x00,             // Pedestal Ctl 0
 150         0x13, 0x00,             // Pedestal Ctl 1
 151         0x14, 0x00,             // Pedestal Ctl 2
 152         0x15, 0x00,             // Pedestal Ctl 3
 153         0x16, 0x00,             // CGMS_WSS_0
 154         0x17, 0x00,             // CGMS_WSS_1
 155         0x18, 0x00,             // CGMS_WSS_2
 156         0x19, 0x00,             // Teletext Ctl
 157 };
 158
 159 static const unsigned char init_PAL[] = {
 160         0x00, 0x71,             // MR0
 161         0x01, 0x20,             // MR1
 162         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 163         0x03, 0x80,             // MR3
 164         0x04, 0x30,             // MR4
 165         0x05, 0x00,             // Reserved
 166         0x06, 0x00,             // Reserved
 167         0x07, TR0MODE,          // TM0
 168         0x08, TR1CAPT,          // TM1
 169         0x09, 0xcb,             // Fsc0
 170         0x0a, 0x8a,             // Fsc1
 171         0x0b, 0x09,             // Fsc2
 172         0x0c, 0x2a,             // Fsc3
 173         0x0d, 0x00,             // Subcarrier Phase
 174         0x0e, 0x00,             // Closed Capt. Ext 0
 175         0x0f, 0x00,             // Closed Capt. Ext 1
 176         0x10, 0x00,             // Closed Capt. 0
 177         0x11, 0x00,             // Closed Capt. 1
 178         0x12, 0x00,             // Pedestal Ctl 0
 179         0x13, 0x00,             // Pedestal Ctl 1
 180         0x14, 0x00,             // Pedestal Ctl 2
 181         0x15, 0x00,             // Pedestal Ctl 3
 182         0x16, 0x00,             // CGMS_WSS_0
 183         0x17, 0x00,             // CGMS_WSS_1
 184         0x18, 0x00,             // CGMS_WSS_2
 185         0x19, 0x00,             // Teletext Ctl
 186 };
 187
 188
 189 static int adv7170_command(struct i2c_client *client, unsigned cmd, void *arg)
 190 {
 191         struct adv7170 *encoder = i2c_get_clientdata(client);
 192
 193         switch (cmd) {
 194         case 0:
 195 #if 0
 196                 /* This is just for testing!!! */
 197                 adv7170_write_block(client, init_common,
 198                                     sizeof(init_common));
 199                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
 200                 adv7170_write(client, 0x07, TR0MODE);
 201 #endif
 202                 break;
 203
 204         case ENCODER_GET_CAPABILITIES:
 205         {
 206                 struct video_encoder_capability *cap = arg;
 207
 208                 cap->flags = VIDEO_ENCODER_PAL |
 209                              VIDEO_ENCODER_NTSC;
 210                 cap->inputs = 2;
 211                 cap->outputs = 1;
 212                 break;
 213         }
 214
 215         case ENCODER_SET_NORM:
 216         {
 217                 int iarg = *(int *) arg;
 218
 219                 v4l_dbg(1, debug, client, "set norm %d\n", iarg);
 220
 221                 switch (iarg) {
 222                 case VIDEO_MODE_NTSC:
 223                         adv7170_write_block(client, init_NTSC,
 224                                             sizeof(init_NTSC));
 225                         if (encoder->input == 0)
 226                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 227                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 228                         adv7170_write(client, 0x07, TR0MODE);
 229                         break;
 230
 231                 case VIDEO_MODE_PAL:
 232                         adv7170_write_block(client, init_PAL,
 233                                             sizeof(init_PAL));
 234                         if (encoder->input == 0)
 235                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 236                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 237                         adv7170_write(client, 0x07, TR0MODE);
 238                         break;
 239
 240                 default:
 241                         v4l_dbg(1, debug, client, "illegal norm: %d\n", iarg);
 242                         return -EINVAL;
 243                 }
 244                 v4l_dbg(1, debug, client, "switched to %s\n", norms[iarg]);
 245                 encoder->norm = iarg;
 246                 break;
 247         }
 248
 249         case ENCODER_SET_INPUT:
 250         {
 251                 int iarg = *(int *) arg;
 252
 253                 /* RJ: *iarg = 0: input is from decoder
 254                  *iarg = 1: input is from ZR36060
 255                  *iarg = 2: color bar */
 256
 257                 v4l_dbg(1, debug, client, "set input from %s\n",
 258                         iarg == 0 ? "decoder" : "ZR36060");
 259
 260                 switch (iarg) {
 261                 case 0:
 262                         adv7170_write(client, 0x01, 0x20);
 263                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
 264                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 265                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 266                         adv7170_write(client, 0x07, TR0MODE);
 267                         /* udelay(10); */
 268                         break;
 269
 270                 case 1:
 271                         adv7170_write(client, 0x01, 0x00);
 272                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
 273                         adv7170_write(client, 0x02, 0x08);
 274                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 275                         adv7170_write(client, 0x07, TR0MODE);
 276                         /* udelay(10); */
 277                         break;
 278
 279                 default:
 280                         v4l_dbg(1, debug, client, "illegal input: %d\n", iarg);
 281                         return -EINVAL;
 282                 }
 283                 v4l_dbg(1, debug, client, "switched to %s\n", inputs[iarg]);
 284                 encoder->input = iarg;
 285                 break;
 286         }
 287
 288         case ENCODER_SET_OUTPUT:
 289         {
 290                 int *iarg = arg;
 291
 292                 /* not much choice of outputs */
 293                 if (*iarg != 0) {
 294                         return -EINVAL;
 295                 }
 296                 break;
 297         }
 298
 299         case ENCODER_ENABLE_OUTPUT:
 300         {
 301                 int *iarg = arg;
 302
 303                 encoder->enable = !!*iarg;
 304                 break;
 305         }
 306
 307         default:
 308                 return -EINVAL;
 309         }
 310
 311         return 0;
 312 }
 313
 314 /* ----------------------------------------------------------------------- */
 315
 316 static unsigned short normal_i2c[] = {
 317         0xd4 >> 1, 0xd6 >> 1,   /* adv7170 IDs */
 318         0x54 >> 1, 0x56 >> 1,   /* adv7171 IDs */
 319         I2C_CLIENT_END
 320 };
 321
 322 I2C_CLIENT_INSMOD;
 323
 324 static int adv7170_probe(struct i2c_client *client,
 325                         const struct i2c_device_id *id)
 326 {
 327         struct adv7170 *encoder;
 328         int i;
 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 adv7170), GFP_KERNEL);
 338         if (encoder == NULL)
 339                 return -ENOMEM;
 340         encoder->norm = VIDEO_MODE_NTSC;
 341         encoder->input = 0;
 342         encoder->enable = 1;
 343         i2c_set_clientdata(client, encoder);
 344
 345         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 346         if (i >= 0) {
 347                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 348                 i = adv7170_write(client, 0x07, TR0MODE);
 349                 i = adv7170_read(client, 0x12);
 350                 v4l_dbg(1, debug, client, "revision %d\n", i & 1);
 351         }
 352         if (i < 0)
 353                 v4l_dbg(1, debug, client, "init error 0x%x\n", i);
 354         return 0;
 355 }
 356
 357 static int adv7170_remove(struct i2c_client *client)
 358 {
 359         kfree(i2c_get_clientdata(client));
 360         return 0;
 361 }
 362
 363 /* ----------------------------------------------------------------------- */
 364
 365 static const struct i2c_device_id adv7170_id[] = {
 366         { "adv7170", 0 },
 367         { "adv7171", 0 },
 368         { }
 369 };
 370 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 371
 372 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 373         .name = "adv7170",
 374         .driverid = I2C_DRIVERID_ADV7170,
 375         .command = adv7170_command,
 376         .probe = adv7170_probe,
 377         .remove = adv7170_remove,
 378         .id_table = adv7170_id,
 379 };