release/src-rt-6.x.4708/linux/linux-2.6.36/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/slab.h>
  34 #include <linux/ioctl.h>
  35 #include <asm/uaccess.h>
  36 #include <linux/i2c.h>
  37 #include <linux/i2c-id.h>
  38 #include <linux/videodev2.h>
  39 #include <media/v4l2-device.h>
  40 #include <media/v4l2-chip-ident.h>
  41 #include <media/v4l2-i2c-drv.h>
  42
  43 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  44 MODULE_AUTHOR("Maxim Yevtyushkin");
  45 MODULE_LICENSE("GPL");
  46
  47
  48 static int debug;
  49 module_param(debug, int, 0);
  50 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  51
  52 /* ----------------------------------------------------------------------- */
  53
  54 struct adv7170 {
  55         struct v4l2_subdev sd;
  56         unsigned char reg[128];
  57
  58         v4l2_std_id norm;
  59         int input;
  60 };
  61
  62 static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)
  63 {
  64         return container_of(sd, struct adv7170, sd);
  65 }
  66
  67 static char *inputs[] = { "pass_through", "play_back" };
  68
  69 /* ----------------------------------------------------------------------- */
  70
  71 static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  72 {
  73         struct i2c_client *client = v4l2_get_subdevdata(sd);
  74         struct adv7170 *encoder = to_adv7170(sd);
  75
  76         encoder->reg[reg] = value;
  77         return i2c_smbus_write_byte_data(client, reg, value);
  78 }
  79
  80 static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg)
  81 {
  82         struct i2c_client *client = v4l2_get_subdevdata(sd);
  83
  84         return i2c_smbus_read_byte_data(client, reg);
  85 }
  86
  87 static int adv7170_write_block(struct v4l2_subdev *sd,
  88                      const u8 *data, unsigned int len)
  89 {
  90         struct i2c_client *client = v4l2_get_subdevdata(sd);
  91         struct adv7170 *encoder = to_adv7170(sd);
  92         int ret = -1;
  93         u8 reg;
  94
  95         /* the adv7170 has an autoincrement function, use it if
  96          * the adapter understands raw I2C */
  97         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  98                 /* do raw I2C, not smbus compatible */
  99                 u8 block_data[32];
 100                 int block_len;
 101
 102                 while (len >= 2) {
 103                         block_len = 0;
 104                         block_data[block_len++] = reg = data[0];
 105                         do {
 106                                 block_data[block_len++] =
 107                                     encoder->reg[reg++] = data[1];
 108                                 len -= 2;
 109                                 data += 2;
 110                         } while (len >= 2 && data[0] == reg && block_len < 32);
 111                         ret = i2c_master_send(client, block_data, block_len);
 112                         if (ret < 0)
 113                                 break;
 114                 }
 115         } else {
 116                 /* do some slow I2C emulation kind of thing */
 117                 while (len >= 2) {
 118                         reg = *data++;
 119                         ret = adv7170_write(sd, reg, *data++);
 120                         if (ret < 0)
 121                                 break;
 122                         len -= 2;
 123                 }
 124         }
 125         return ret;
 126 }
 127
 128 /* ----------------------------------------------------------------------- */
 129
 130 #define TR0MODE     0x4c
 131 #define TR0RST      0x80
 132
 133 #define TR1CAPT     0x00
 134 #define TR1PLAY     0x00
 135
 136 static const unsigned char init_NTSC[] = {
 137         0x00, 0x10,             /* MR0 */
 138         0x01, 0x20,             /* MR1 */
 139         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 140         0x03, 0x80,             /* MR3 */
 141         0x04, 0x30,             /* MR4 */
 142         0x05, 0x00,             /* Reserved */
 143         0x06, 0x00,             /* Reserved */
 144         0x07, TR0MODE,          /* TM0 */
 145         0x08, TR1CAPT,          /* TM1 */
 146         0x09, 0x16,             /* Fsc0 */
 147         0x0a, 0x7c,             /* Fsc1 */
 148         0x0b, 0xf0,             /* Fsc2 */
 149         0x0c, 0x21,             /* Fsc3 */
 150         0x0d, 0x00,             /* Subcarrier Phase */
 151         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 152         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 153         0x10, 0x00,             /* Closed Capt. 0 */
 154         0x11, 0x00,             /* Closed Capt. 1 */
 155         0x12, 0x00,             /* Pedestal Ctl 0 */
 156         0x13, 0x00,             /* Pedestal Ctl 1 */
 157         0x14, 0x00,             /* Pedestal Ctl 2 */
 158         0x15, 0x00,             /* Pedestal Ctl 3 */
 159         0x16, 0x00,             /* CGMS_WSS_0 */
 160         0x17, 0x00,             /* CGMS_WSS_1 */
 161         0x18, 0x00,             /* CGMS_WSS_2 */
 162         0x19, 0x00,             /* Teletext Ctl */
 163 };
 164
 165 static const unsigned char init_PAL[] = {
 166         0x00, 0x71,             /* MR0 */
 167         0x01, 0x20,             /* MR1 */
 168         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 169         0x03, 0x80,             /* MR3 */
 170         0x04, 0x30,             /* MR4 */
 171         0x05, 0x00,             /* Reserved */
 172         0x06, 0x00,             /* Reserved */
 173         0x07, TR0MODE,          /* TM0 */
 174         0x08, TR1CAPT,          /* TM1 */
 175         0x09, 0xcb,             /* Fsc0 */
 176         0x0a, 0x8a,             /* Fsc1 */
 177         0x0b, 0x09,             /* Fsc2 */
 178         0x0c, 0x2a,             /* Fsc3 */
 179         0x0d, 0x00,             /* Subcarrier Phase */
 180         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 181         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 182         0x10, 0x00,             /* Closed Capt. 0 */
 183         0x11, 0x00,             /* Closed Capt. 1 */
 184         0x12, 0x00,             /* Pedestal Ctl 0 */
 185         0x13, 0x00,             /* Pedestal Ctl 1 */
 186         0x14, 0x00,             /* Pedestal Ctl 2 */
 187         0x15, 0x00,             /* Pedestal Ctl 3 */
 188         0x16, 0x00,             /* CGMS_WSS_0 */
 189         0x17, 0x00,             /* CGMS_WSS_1 */
 190         0x18, 0x00,             /* CGMS_WSS_2 */
 191         0x19, 0x00,             /* Teletext Ctl */
 192 };
 193
 194
 195 static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 196 {
 197         struct adv7170 *encoder = to_adv7170(sd);
 198
 199         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 200
 201         if (std & V4L2_STD_NTSC) {
 202                 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 203                 if (encoder->input == 0)
 204                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 205                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 206                 adv7170_write(sd, 0x07, TR0MODE);
 207         } else if (std & V4L2_STD_PAL) {
 208                 adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
 209                 if (encoder->input == 0)
 210                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 211                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 212                 adv7170_write(sd, 0x07, TR0MODE);
 213         } else {
 214                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 215                                 (unsigned long long)std);
 216                 return -EINVAL;
 217         }
 218         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 219         encoder->norm = std;
 220         return 0;
 221 }
 222
 223 static int adv7170_s_routing(struct v4l2_subdev *sd,
 224                              u32 input, u32 output, u32 config)
 225 {
 226         struct adv7170 *encoder = to_adv7170(sd);
 227
 228         /* RJ: input = 0: input is from decoder
 229            input = 1: input is from ZR36060
 230            input = 2: color bar */
 231
 232         v4l2_dbg(1, debug, sd, "set input from %s\n",
 233                         input == 0 ? "decoder" : "ZR36060");
 234
 235         switch (input) {
 236         case 0:
 237                 adv7170_write(sd, 0x01, 0x20);
 238                 adv7170_write(sd, 0x08, TR1CAPT);       /* TR1 */
 239                 adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 240                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 241                 adv7170_write(sd, 0x07, TR0MODE);
 242                 /* udelay(10); */
 243                 break;
 244
 245         case 1:
 246                 adv7170_write(sd, 0x01, 0x00);
 247                 adv7170_write(sd, 0x08, TR1PLAY);       /* TR1 */
 248                 adv7170_write(sd, 0x02, 0x08);
 249                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 250                 adv7170_write(sd, 0x07, TR0MODE);
 251                 /* udelay(10); */
 252                 break;
 253
 254         default:
 255                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 256                 return -EINVAL;
 257         }
 258         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 259         encoder->input = input;
 260         return 0;
 261 }
 262
 263 static int adv7170_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 264 {
 265         struct i2c_client *client = v4l2_get_subdevdata(sd);
 266
 267         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7170, 0);
 268 }
 269
 270 /* ----------------------------------------------------------------------- */
 271
 272 static const struct v4l2_subdev_core_ops adv7170_core_ops = {
 273         .g_chip_ident = adv7170_g_chip_ident,
 274 };
 275
 276 static const struct v4l2_subdev_video_ops adv7170_video_ops = {
 277         .s_std_output = adv7170_s_std_output,
 278         .s_routing = adv7170_s_routing,
 279 };
 280
 281 static const struct v4l2_subdev_ops adv7170_ops = {
 282         .core = &adv7170_core_ops,
 283         .video = &adv7170_video_ops,
 284 };
 285
 286 /* ----------------------------------------------------------------------- */
 287
 288 static int adv7170_probe(struct i2c_client *client,
 289                         const struct i2c_device_id *id)
 290 {
 291         struct adv7170 *encoder;
 292         struct v4l2_subdev *sd;
 293         int i;
 294
 295         /* Check if the adapter supports the needed features */
 296         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 297                 return -ENODEV;
 298
 299         v4l_info(client, "chip found @ 0x%x (%s)\n",
 300                         client->addr << 1, client->adapter->name);
 301
 302         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 303         if (encoder == NULL)
 304                 return -ENOMEM;
 305         sd = &encoder->sd;
 306         v4l2_i2c_subdev_init(sd, client, &adv7170_ops);
 307         encoder->norm = V4L2_STD_NTSC;
 308         encoder->input = 0;
 309
 310         i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 311         if (i >= 0) {
 312                 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 313                 i = adv7170_write(sd, 0x07, TR0MODE);
 314                 i = adv7170_read(sd, 0x12);
 315                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 316         }
 317         if (i < 0)
 318                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 319         return 0;
 320 }
 321
 322 static int adv7170_remove(struct i2c_client *client)
 323 {
 324         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 325
 326         v4l2_device_unregister_subdev(sd);
 327         kfree(to_adv7170(sd));
 328         return 0;
 329 }
 330
 331 /* ----------------------------------------------------------------------- */
 332
 333 static const struct i2c_device_id adv7170_id[] = {
 334         { "adv7170", 0 },
 335         { "adv7171", 0 },
 336         { }
 337 };
 338 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 339
 340 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 341         .name = "adv7170",
 342         .probe = adv7170_probe,
 343         .remove = adv7170_remove,
 344         .id_table = adv7170_id,
 345 };