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         v4l2_std_id norm;
  56         int input;
  57         int bright;
  58         int contrast;
  59         int hue;
  60         int sat;
  61 };
  62
  63 static char *inputs[] = { "pass_through", "play_back" };
  64
  65 /* ----------------------------------------------------------------------- */
  66
  67 static inline int adv7170_write(struct i2c_client *client, u8 reg, u8 value)
  68 {
  69         struct adv7170 *encoder = i2c_get_clientdata(client);
  70
  71         encoder->reg[reg] = value;
  72         return i2c_smbus_write_byte_data(client, reg, value);
  73 }
  74
  75 static inline int adv7170_read(struct i2c_client *client, u8 reg)
  76 {
  77         return i2c_smbus_read_byte_data(client, reg);
  78 }
  79
  80 static int adv7170_write_block(struct i2c_client *client,
  81                      const u8 *data, unsigned int len)
  82 {
  83         int ret = -1;
  84         u8 reg;
  85
  86         /* the adv7170 has an autoincrement function, use it if
  87          * the adapter understands raw I2C */
  88         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  89                 /* do raw I2C, not smbus compatible */
  90                 struct adv7170 *encoder = i2c_get_clientdata(client);
  91                 u8 block_data[32];
  92                 int block_len;
  93
  94                 while (len >= 2) {
  95                         block_len = 0;
  96                         block_data[block_len++] = reg = data[0];
  97                         do {
  98                                 block_data[block_len++] =
  99                                     encoder->reg[reg++] = data[1];
 100                                 len -= 2;
 101                                 data += 2;
 102                         } while (len >= 2 && data[0] == reg && block_len < 32);
 103                         ret = i2c_master_send(client, block_data, block_len);
 104                         if (ret < 0)
 105                                 break;
 106                 }
 107         } else {
 108                 /* do some slow I2C emulation kind of thing */
 109                 while (len >= 2) {
 110                         reg = *data++;
 111                         ret = adv7170_write(client, reg, *data++);
 112                         if (ret < 0)
 113                                 break;
 114                         len -= 2;
 115                 }
 116         }
 117         return ret;
 118 }
 119
 120 /* ----------------------------------------------------------------------- */
 121
 122 #define TR0MODE     0x4c
 123 #define TR0RST      0x80
 124
 125 #define TR1CAPT     0x00
 126 #define TR1PLAY     0x00
 127
 128 static const unsigned char init_NTSC[] = {
 129         0x00, 0x10,             // MR0
 130         0x01, 0x20,             // MR1
 131         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 132         0x03, 0x80,             // MR3
 133         0x04, 0x30,             // MR4
 134         0x05, 0x00,             // Reserved
 135         0x06, 0x00,             // Reserved
 136         0x07, TR0MODE,          // TM0
 137         0x08, TR1CAPT,          // TM1
 138         0x09, 0x16,             // Fsc0
 139         0x0a, 0x7c,             // Fsc1
 140         0x0b, 0xf0,             // Fsc2
 141         0x0c, 0x21,             // Fsc3
 142         0x0d, 0x00,             // Subcarrier Phase
 143         0x0e, 0x00,             // Closed Capt. Ext 0
 144         0x0f, 0x00,             // Closed Capt. Ext 1
 145         0x10, 0x00,             // Closed Capt. 0
 146         0x11, 0x00,             // Closed Capt. 1
 147         0x12, 0x00,             // Pedestal Ctl 0
 148         0x13, 0x00,             // Pedestal Ctl 1
 149         0x14, 0x00,             // Pedestal Ctl 2
 150         0x15, 0x00,             // Pedestal Ctl 3
 151         0x16, 0x00,             // CGMS_WSS_0
 152         0x17, 0x00,             // CGMS_WSS_1
 153         0x18, 0x00,             // CGMS_WSS_2
 154         0x19, 0x00,             // Teletext Ctl
 155 };
 156
 157 static const unsigned char init_PAL[] = {
 158         0x00, 0x71,             // MR0
 159         0x01, 0x20,             // MR1
 160         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
 161         0x03, 0x80,             // MR3
 162         0x04, 0x30,             // MR4
 163         0x05, 0x00,             // Reserved
 164         0x06, 0x00,             // Reserved
 165         0x07, TR0MODE,          // TM0
 166         0x08, TR1CAPT,          // TM1
 167         0x09, 0xcb,             // Fsc0
 168         0x0a, 0x8a,             // Fsc1
 169         0x0b, 0x09,             // Fsc2
 170         0x0c, 0x2a,             // Fsc3
 171         0x0d, 0x00,             // Subcarrier Phase
 172         0x0e, 0x00,             // Closed Capt. Ext 0
 173         0x0f, 0x00,             // Closed Capt. Ext 1
 174         0x10, 0x00,             // Closed Capt. 0
 175         0x11, 0x00,             // Closed Capt. 1
 176         0x12, 0x00,             // Pedestal Ctl 0
 177         0x13, 0x00,             // Pedestal Ctl 1
 178         0x14, 0x00,             // Pedestal Ctl 2
 179         0x15, 0x00,             // Pedestal Ctl 3
 180         0x16, 0x00,             // CGMS_WSS_0
 181         0x17, 0x00,             // CGMS_WSS_1
 182         0x18, 0x00,             // CGMS_WSS_2
 183         0x19, 0x00,             // Teletext Ctl
 184 };
 185
 186
 187 static int adv7170_command(struct i2c_client *client, unsigned cmd, void *arg)
 188 {
 189         struct adv7170 *encoder = i2c_get_clientdata(client);
 190
 191         switch (cmd) {
 192         case VIDIOC_INT_INIT:
 193 #if 0
 194                 /* This is just for testing!!! */
 195                 adv7170_write_block(client, init_common,
 196                                     sizeof(init_common));
 197                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
 198                 adv7170_write(client, 0x07, TR0MODE);
 199 #endif
 200                 break;
 201
 202         case VIDIOC_INT_S_STD_OUTPUT:
 203         {
 204                 v4l2_std_id iarg = *(v4l2_std_id *) arg;
 205
 206                 v4l_dbg(1, debug, client, "set norm %llx\n", iarg);
 207
 208                 if (iarg & V4L2_STD_NTSC) {
 209                         adv7170_write_block(client, init_NTSC,
 210                                             sizeof(init_NTSC));
 211                         if (encoder->input == 0)
 212                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 213                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 214                         adv7170_write(client, 0x07, TR0MODE);
 215                 } else if (iarg & V4L2_STD_PAL) {
 216                         adv7170_write_block(client, init_PAL,
 217                                             sizeof(init_PAL));
 218                         if (encoder->input == 0)
 219                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 220                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 221                         adv7170_write(client, 0x07, TR0MODE);
 222                 } else {
 223                         v4l_dbg(1, debug, client, "illegal norm: %llx\n", iarg);
 224                         return -EINVAL;
 225                 }
 226                 v4l_dbg(1, debug, client, "switched to %llx\n", iarg);
 227                 encoder->norm = iarg;
 228                 break;
 229         }
 230
 231         case VIDIOC_INT_S_VIDEO_ROUTING:
 232         {
 233                 struct v4l2_routing *route = arg;
 234
 235                 /* RJ: *iarg = 0: input is from decoder
 236                  *iarg = 1: input is from ZR36060
 237                  *iarg = 2: color bar */
 238
 239                 v4l_dbg(1, debug, client, "set input from %s\n",
 240                         route->input == 0 ? "decoder" : "ZR36060");
 241
 242                 switch (route->input) {
 243                 case 0:
 244                         adv7170_write(client, 0x01, 0x20);
 245                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
 246                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
 247                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 248                         adv7170_write(client, 0x07, TR0MODE);
 249                         /* udelay(10); */
 250                         break;
 251
 252                 case 1:
 253                         adv7170_write(client, 0x01, 0x00);
 254                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
 255                         adv7170_write(client, 0x02, 0x08);
 256                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
 257                         adv7170_write(client, 0x07, TR0MODE);
 258                         /* udelay(10); */
 259                         break;
 260
 261                 default:
 262                         v4l_dbg(1, debug, client, "illegal input: %d\n", route->input);
 263                         return -EINVAL;
 264                 }
 265                 v4l_dbg(1, debug, client, "switched to %s\n", inputs[route->input]);
 266                 encoder->input = route->input;
 267                 break;
 268         }
 269
 270         default:
 271                 return -EINVAL;
 272         }
 273
 274         return 0;
 275 }
 276
 277 /* ----------------------------------------------------------------------- */
 278
 279 static unsigned short normal_i2c[] = {
 280         0xd4 >> 1, 0xd6 >> 1,   /* adv7170 IDs */
 281         0x54 >> 1, 0x56 >> 1,   /* adv7171 IDs */
 282         I2C_CLIENT_END
 283 };
 284
 285 I2C_CLIENT_INSMOD;
 286
 287 static int adv7170_probe(struct i2c_client *client,
 288                         const struct i2c_device_id *id)
 289 {
 290         struct adv7170 *encoder;
 291         int i;
 292
 293         /* Check if the adapter supports the needed features */
 294         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 295                 return -ENODEV;
 296
 297         v4l_info(client, "chip found @ 0x%x (%s)\n",
 298                         client->addr << 1, client->adapter->name);
 299
 300         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 301         if (encoder == NULL)
 302                 return -ENOMEM;
 303         encoder->norm = V4L2_STD_NTSC;
 304         encoder->input = 0;
 305         i2c_set_clientdata(client, encoder);
 306
 307         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
 308         if (i >= 0) {
 309                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
 310                 i = adv7170_write(client, 0x07, TR0MODE);
 311                 i = adv7170_read(client, 0x12);
 312                 v4l_dbg(1, debug, client, "revision %d\n", i & 1);
 313         }
 314         if (i < 0)
 315                 v4l_dbg(1, debug, client, "init error 0x%x\n", i);
 316         return 0;
 317 }
 318
 319 static int adv7170_remove(struct i2c_client *client)
 320 {
 321         kfree(i2c_get_clientdata(client));
 322         return 0;
 323 }
 324
 325 /* ----------------------------------------------------------------------- */
 326
 327 static const struct i2c_device_id adv7170_id[] = {
 328         { "adv7170", 0 },
 329         { "adv7171", 0 },
 330         { }
 331 };
 332 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 333
 334 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 335         .name = "adv7170",
 336         .driverid = I2C_DRIVERID_ADV7170,
 337         .command = adv7170_command,
 338         .probe = adv7170_probe,
 339         .remove = adv7170_remove,
 340         .id_table = adv7170_id,
 341 };