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/videodev2.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-chip-ident.h>
  40 #include <media/v4l2-i2c-drv.h>
  41
  42 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  43 MODULE_AUTHOR("Maxim Yevtyushkin");
  44 MODULE_LICENSE("GPL");
  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 adv7170 {
  54         struct v4l2_subdev sd;
  55         unsigned char reg[128];
  56
  57         v4l2_std_id norm;
  58         int input;
  59 };
  60
  61 static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)
  62 {
  63         return container_of(sd, struct adv7170, sd);
  64 }
  65
  66 static char *inputs[] = { "pass_through", "play_back" };
  67
  68 /* ----------------------------------------------------------------------- */
  69
  70 static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  71 {
  72         struct i2c_client *client = v4l2_get_subdevdata(sd);
  73         struct adv7170 *encoder = to_adv7170(sd);
  74
  75         encoder->reg[reg] = value;
  76         return i2c_smbus_write_byte_data(client, reg, value);
  77 }
  78
  79 static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg)
  80 {
  81         struct i2c_client *client = v4l2_get_subdevdata(sd);
  82
  83         return i2c_smbus_read_byte_data(client, reg);
  84 }
  85
  86 static int adv7170_write_block(struct v4l2_subdev *sd,
  87                      const u8 *data, unsigned int len)
  88 {
  89         struct i2c_client *client = v4l2_get_subdevdata(sd);
  90         struct adv7170 *encoder = to_adv7170(sd);
  91         int ret = -1;
  92         u8 reg;
  93
  94         /* the adv7170 has an autoincrement function, use it if
  95          * the adapter understands raw I2C */
  96         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  97                 /* do raw I2C, not smbus compatible */
  98                 u8 block_data[32];
  99                 int block_len;
 100
 101                 while (len >= 2) {
 102                         block_len = 0;
 103                         block_data[block_len++] = reg = data[0];
 104                         do {
 105                                 block_data[block_len++] =
 106                                     encoder->reg[reg++] = data[1];
 107                                 len -= 2;
 108                                 data += 2;
 109                         } while (len >= 2 && data[0] == reg && block_len < 32);
 110                         ret = i2c_master_send(client, block_data, block_len);
 111                         if (ret < 0)
 112                                 break;
 113                 }
 114         } else {
 115                 /* do some slow I2C emulation kind of thing */
 116                 while (len >= 2) {
 117                         reg = *data++;
 118                         ret = adv7170_write(sd, reg, *data++);
 119                         if (ret < 0)
 120                                 break;
 121                         len -= 2;
 122                 }
 123         }
 124         return ret;
 125 }
 126
 127 /* ----------------------------------------------------------------------- */
 128
 129 #define TR0MODE     0x4c
 130 #define TR0RST      0x80
 131
 132 #define TR1CAPT     0x00
 133 #define TR1PLAY     0x00
 134
 135 static const unsigned char init_NTSC[] = {
 136         0x00, 0x10,             /* MR0 */
 137         0x01, 0x20,             /* MR1 */
 138         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 139         0x03, 0x80,             /* MR3 */
 140         0x04, 0x30,             /* MR4 */
 141         0x05, 0x00,             /* Reserved */
 142         0x06, 0x00,             /* Reserved */
 143         0x07, TR0MODE,          /* TM0 */
 144         0x08, TR1CAPT,          /* TM1 */
 145         0x09, 0x16,             /* Fsc0 */
 146         0x0a, 0x7c,             /* Fsc1 */
 147         0x0b, 0xf0,             /* Fsc2 */
 148         0x0c, 0x21,             /* Fsc3 */
 149         0x0d, 0x00,             /* Subcarrier Phase */
 150         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 151         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 152         0x10, 0x00,             /* Closed Capt. 0 */
 153         0x11, 0x00,             /* Closed Capt. 1 */
 154         0x12, 0x00,             /* Pedestal Ctl 0 */
 155         0x13, 0x00,             /* Pedestal Ctl 1 */
 156         0x14, 0x00,             /* Pedestal Ctl 2 */
 157         0x15, 0x00,             /* Pedestal Ctl 3 */
 158         0x16, 0x00,             /* CGMS_WSS_0 */
 159         0x17, 0x00,             /* CGMS_WSS_1 */
 160         0x18, 0x00,             /* CGMS_WSS_2 */
 161         0x19, 0x00,             /* Teletext Ctl */
 162 };
 163
 164 static const unsigned char init_PAL[] = {
 165         0x00, 0x71,             /* MR0 */
 166         0x01, 0x20,             /* MR1 */
 167         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 168         0x03, 0x80,             /* MR3 */
 169         0x04, 0x30,             /* MR4 */
 170         0x05, 0x00,             /* Reserved */
 171         0x06, 0x00,             /* Reserved */
 172         0x07, TR0MODE,          /* TM0 */
 173         0x08, TR1CAPT,          /* TM1 */
 174         0x09, 0xcb,             /* Fsc0 */
 175         0x0a, 0x8a,             /* Fsc1 */
 176         0x0b, 0x09,             /* Fsc2 */
 177         0x0c, 0x2a,             /* Fsc3 */
 178         0x0d, 0x00,             /* Subcarrier Phase */
 179         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 180         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 181         0x10, 0x00,             /* Closed Capt. 0 */
 182         0x11, 0x00,             /* Closed Capt. 1 */
 183         0x12, 0x00,             /* Pedestal Ctl 0 */
 184         0x13, 0x00,             /* Pedestal Ctl 1 */
 185         0x14, 0x00,             /* Pedestal Ctl 2 */
 186         0x15, 0x00,             /* Pedestal Ctl 3 */
 187         0x16, 0x00,             /* CGMS_WSS_0 */
 188         0x17, 0x00,             /* CGMS_WSS_1 */
 189         0x18, 0x00,             /* CGMS_WSS_2 */
 190         0x19, 0x00,             /* Teletext Ctl */
 191 };
 192
 193
 194 static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 195 {
 196         struct adv7170 *encoder = to_adv7170(sd);
 197
 198         v4l2_dbg(1, debug, sd, "set norm %llx\n", std);
 199
 200         if (std & V4L2_STD_NTSC) {
 201                 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 202                 if (encoder->input == 0)
 203                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 204                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 205                 adv7170_write(sd, 0x07, TR0MODE);
 206         } else if (std & V4L2_STD_PAL) {
 207                 adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
 208                 if (encoder->input == 0)
 209                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 210                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 211                 adv7170_write(sd, 0x07, TR0MODE);
 212         } else {
 213                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n", std);
 214                 return -EINVAL;
 215         }
 216         v4l2_dbg(1, debug, sd, "switched to %llx\n", std);
 217         encoder->norm = std;
 218         return 0;
 219 }
 220
 221 static int adv7170_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 222 {
 223         struct adv7170 *encoder = to_adv7170(sd);
 224
 225         /* RJ: route->input = 0: input is from decoder
 226            route->input = 1: input is from ZR36060
 227            route->input = 2: color bar */
 228
 229         v4l2_dbg(1, debug, sd, "set input from %s\n",
 230                         route->input == 0 ? "decoder" : "ZR36060");
 231
 232         switch (route->input) {
 233         case 0:
 234                 adv7170_write(sd, 0x01, 0x20);
 235                 adv7170_write(sd, 0x08, TR1CAPT);       /* TR1 */
 236                 adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 237                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 238                 adv7170_write(sd, 0x07, TR0MODE);
 239                 /* udelay(10); */
 240                 break;
 241
 242         case 1:
 243                 adv7170_write(sd, 0x01, 0x00);
 244                 adv7170_write(sd, 0x08, TR1PLAY);       /* TR1 */
 245                 adv7170_write(sd, 0x02, 0x08);
 246                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 247                 adv7170_write(sd, 0x07, TR0MODE);
 248                 /* udelay(10); */
 249                 break;
 250
 251         default:
 252                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", route->input);
 253                 return -EINVAL;
 254         }
 255         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[route->input]);
 256         encoder->input = route->input;
 257         return 0;
 258 }
 259
 260 static int adv7170_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 261 {
 262         struct i2c_client *client = v4l2_get_subdevdata(sd);
 263
 264         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7170, 0);
 265 }
 266
 267 /* ----------------------------------------------------------------------- */
 268
 269 static const struct v4l2_subdev_core_ops adv7170_core_ops = {
 270         .g_chip_ident = adv7170_g_chip_ident,
 271 };
 272
 273 static const struct v4l2_subdev_video_ops adv7170_video_ops = {
 274         .s_std_output = adv7170_s_std_output,
 275         .s_routing = adv7170_s_routing,
 276 };
 277
 278 static const struct v4l2_subdev_ops adv7170_ops = {
 279         .core = &adv7170_core_ops,
 280         .video = &adv7170_video_ops,
 281 };
 282
 283 /* ----------------------------------------------------------------------- */
 284
 285 static int adv7170_probe(struct i2c_client *client,
 286                         const struct i2c_device_id *id)
 287 {
 288         struct adv7170 *encoder;
 289         struct v4l2_subdev *sd;
 290         int i;
 291
 292         /* Check if the adapter supports the needed features */
 293         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 294                 return -ENODEV;
 295
 296         v4l_info(client, "chip found @ 0x%x (%s)\n",
 297                         client->addr << 1, client->adapter->name);
 298
 299         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 300         if (encoder == NULL)
 301                 return -ENOMEM;
 302         sd = &encoder->sd;
 303         v4l2_i2c_subdev_init(sd, client, &adv7170_ops);
 304         encoder->norm = V4L2_STD_NTSC;
 305         encoder->input = 0;
 306
 307         i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 308         if (i >= 0) {
 309                 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 310                 i = adv7170_write(sd, 0x07, TR0MODE);
 311                 i = adv7170_read(sd, 0x12);
 312                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 313         }
 314         if (i < 0)
 315                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 316         return 0;
 317 }
 318
 319 static int adv7170_remove(struct i2c_client *client)
 320 {
 321         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 322
 323         v4l2_device_unregister_subdev(sd);
 324         kfree(to_adv7170(sd));
 325         return 0;
 326 }
 327
 328 /* ----------------------------------------------------------------------- */
 329
 330 static const struct i2c_device_id adv7170_id[] = {
 331         { "adv7170", 0 },
 332         { "adv7171", 0 },
 333         { }
 334 };
 335 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 336
 337 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 338         .name = "adv7170",
 339         .probe = adv7170_probe,
 340         .remove = adv7170_remove,
 341         .id_table = adv7170_id,
 342 };