drivers/media/i2c/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 <linux/uaccess.h>
  36 #include <linux/i2c.h>
  37 #include <linux/videodev2.h>
  38 #include <media/v4l2-device.h>
  39
  40 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  41 MODULE_AUTHOR("Maxim Yevtyushkin");
  42 MODULE_LICENSE("GPL");
  43
  44
  45 static int debug;
  46 module_param(debug, int, 0);
  47 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  48
  49 /* ----------------------------------------------------------------------- */
  50
  51 struct adv7170 {
  52         struct v4l2_subdev sd;
  53         unsigned char reg[128];
  54
  55         v4l2_std_id norm;
  56         int input;
  57 };
  58
  59 static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)
  60 {
  61         return container_of(sd, struct adv7170, sd);
  62 }
  63
  64 static char *inputs[] = { "pass_through", "play_back" };
  65
  66 static u32 adv7170_codes[] = {
  67         MEDIA_BUS_FMT_UYVY8_2X8,
  68         MEDIA_BUS_FMT_UYVY8_1X16,
  69 };
  70
  71 /* ----------------------------------------------------------------------- */
  72
  73 static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  74 {
  75         struct i2c_client *client = v4l2_get_subdevdata(sd);
  76         struct adv7170 *encoder = to_adv7170(sd);
  77
  78         encoder->reg[reg] = value;
  79         return i2c_smbus_write_byte_data(client, reg, value);
  80 }
  81
  82 static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg)
  83 {
  84         struct i2c_client *client = v4l2_get_subdevdata(sd);
  85
  86         return i2c_smbus_read_byte_data(client, reg);
  87 }
  88
  89 static int adv7170_write_block(struct v4l2_subdev *sd,
  90                      const u8 *data, unsigned int len)
  91 {
  92         struct i2c_client *client = v4l2_get_subdevdata(sd);
  93         struct adv7170 *encoder = to_adv7170(sd);
  94         int ret = -1;
  95         u8 reg;
  96
  97         /* the adv7170 has an autoincrement function, use it if
  98          * the adapter understands raw I2C */
  99         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 100                 /* do raw I2C, not smbus compatible */
 101                 u8 block_data[32];
 102                 int block_len;
 103
 104                 while (len >= 2) {
 105                         block_len = 0;
 106                         block_data[block_len++] = reg = data[0];
 107                         do {
 108                                 block_data[block_len++] =
 109                                     encoder->reg[reg++] = data[1];
 110                                 len -= 2;
 111                                 data += 2;
 112                         } while (len >= 2 && data[0] == reg && block_len < 32);
 113                         ret = i2c_master_send(client, block_data, block_len);
 114                         if (ret < 0)
 115                                 break;
 116                 }
 117         } else {
 118                 /* do some slow I2C emulation kind of thing */
 119                 while (len >= 2) {
 120                         reg = *data++;
 121                         ret = adv7170_write(sd, reg, *data++);
 122                         if (ret < 0)
 123                                 break;
 124                         len -= 2;
 125                 }
 126         }
 127         return ret;
 128 }
 129
 130 /* ----------------------------------------------------------------------- */
 131
 132 #define TR0MODE     0x4c
 133 #define TR0RST      0x80
 134
 135 #define TR1CAPT     0x00
 136 #define TR1PLAY     0x00
 137
 138 static const unsigned char init_NTSC[] = {
 139         0x00, 0x10,             /* MR0 */
 140         0x01, 0x20,             /* MR1 */
 141         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 142         0x03, 0x80,             /* MR3 */
 143         0x04, 0x30,             /* MR4 */
 144         0x05, 0x00,             /* Reserved */
 145         0x06, 0x00,             /* Reserved */
 146         0x07, TR0MODE,          /* TM0 */
 147         0x08, TR1CAPT,          /* TM1 */
 148         0x09, 0x16,             /* Fsc0 */
 149         0x0a, 0x7c,             /* Fsc1 */
 150         0x0b, 0xf0,             /* Fsc2 */
 151         0x0c, 0x21,             /* Fsc3 */
 152         0x0d, 0x00,             /* Subcarrier Phase */
 153         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 154         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 155         0x10, 0x00,             /* Closed Capt. 0 */
 156         0x11, 0x00,             /* Closed Capt. 1 */
 157         0x12, 0x00,             /* Pedestal Ctl 0 */
 158         0x13, 0x00,             /* Pedestal Ctl 1 */
 159         0x14, 0x00,             /* Pedestal Ctl 2 */
 160         0x15, 0x00,             /* Pedestal Ctl 3 */
 161         0x16, 0x00,             /* CGMS_WSS_0 */
 162         0x17, 0x00,             /* CGMS_WSS_1 */
 163         0x18, 0x00,             /* CGMS_WSS_2 */
 164         0x19, 0x00,             /* Teletext Ctl */
 165 };
 166
 167 static const unsigned char init_PAL[] = {
 168         0x00, 0x71,             /* MR0 */
 169         0x01, 0x20,             /* MR1 */
 170         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 171         0x03, 0x80,             /* MR3 */
 172         0x04, 0x30,             /* MR4 */
 173         0x05, 0x00,             /* Reserved */
 174         0x06, 0x00,             /* Reserved */
 175         0x07, TR0MODE,          /* TM0 */
 176         0x08, TR1CAPT,          /* TM1 */
 177         0x09, 0xcb,             /* Fsc0 */
 178         0x0a, 0x8a,             /* Fsc1 */
 179         0x0b, 0x09,             /* Fsc2 */
 180         0x0c, 0x2a,             /* Fsc3 */
 181         0x0d, 0x00,             /* Subcarrier Phase */
 182         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 183         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 184         0x10, 0x00,             /* Closed Capt. 0 */
 185         0x11, 0x00,             /* Closed Capt. 1 */
 186         0x12, 0x00,             /* Pedestal Ctl 0 */
 187         0x13, 0x00,             /* Pedestal Ctl 1 */
 188         0x14, 0x00,             /* Pedestal Ctl 2 */
 189         0x15, 0x00,             /* Pedestal Ctl 3 */
 190         0x16, 0x00,             /* CGMS_WSS_0 */
 191         0x17, 0x00,             /* CGMS_WSS_1 */
 192         0x18, 0x00,             /* CGMS_WSS_2 */
 193         0x19, 0x00,             /* Teletext Ctl */
 194 };
 195
 196
 197 static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 198 {
 199         struct adv7170 *encoder = to_adv7170(sd);
 200
 201         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 202
 203         if (std & V4L2_STD_NTSC) {
 204                 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 205                 if (encoder->input == 0)
 206                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 207                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 208                 adv7170_write(sd, 0x07, TR0MODE);
 209         } else if (std & V4L2_STD_PAL) {
 210                 adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
 211                 if (encoder->input == 0)
 212                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 213                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 214                 adv7170_write(sd, 0x07, TR0MODE);
 215         } else {
 216                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 217                                 (unsigned long long)std);
 218                 return -EINVAL;
 219         }
 220         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 221         encoder->norm = std;
 222         return 0;
 223 }
 224
 225 static int adv7170_s_routing(struct v4l2_subdev *sd,
 226                              u32 input, u32 output, u32 config)
 227 {
 228         struct adv7170 *encoder = to_adv7170(sd);
 229
 230         /* RJ: input = 0: input is from decoder
 231            input = 1: input is from ZR36060
 232            input = 2: color bar */
 233
 234         v4l2_dbg(1, debug, sd, "set input from %s\n",
 235                         input == 0 ? "decoder" : "ZR36060");
 236
 237         switch (input) {
 238         case 0:
 239                 adv7170_write(sd, 0x01, 0x20);
 240                 adv7170_write(sd, 0x08, TR1CAPT);       /* TR1 */
 241                 adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 242                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 243                 adv7170_write(sd, 0x07, TR0MODE);
 244                 /* udelay(10); */
 245                 break;
 246
 247         case 1:
 248                 adv7170_write(sd, 0x01, 0x00);
 249                 adv7170_write(sd, 0x08, TR1PLAY);       /* TR1 */
 250                 adv7170_write(sd, 0x02, 0x08);
 251                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 252                 adv7170_write(sd, 0x07, TR0MODE);
 253                 /* udelay(10); */
 254                 break;
 255
 256         default:
 257                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 258                 return -EINVAL;
 259         }
 260         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 261         encoder->input = input;
 262         return 0;
 263 }
 264
 265 static int adv7170_enum_mbus_code(struct v4l2_subdev *sd,
 266                 struct v4l2_subdev_pad_config *cfg,
 267                 struct v4l2_subdev_mbus_code_enum *code)
 268 {
 269         if (code->pad || code->index >= ARRAY_SIZE(adv7170_codes))
 270                 return -EINVAL;
 271
 272         code->code = adv7170_codes[code->index];
 273         return 0;
 274 }
 275
 276 static int adv7170_get_fmt(struct v4l2_subdev *sd,
 277                 struct v4l2_subdev_pad_config *cfg,
 278                 struct v4l2_subdev_format *format)
 279 {
 280         struct v4l2_mbus_framefmt *mf = &format->format;
 281         u8 val = adv7170_read(sd, 0x7);
 282
 283         if (format->pad)
 284                 return -EINVAL;
 285
 286         if ((val & 0x40) == (1 << 6))
 287                 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
 288         else
 289                 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 290
 291         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 292         mf->width       = 0;
 293         mf->height      = 0;
 294         mf->field       = V4L2_FIELD_ANY;
 295
 296         return 0;
 297 }
 298
 299 static int adv7170_set_fmt(struct v4l2_subdev *sd,
 300                 struct v4l2_subdev_pad_config *cfg,
 301                 struct v4l2_subdev_format *format)
 302 {
 303         struct v4l2_mbus_framefmt *mf = &format->format;
 304         u8 val = adv7170_read(sd, 0x7);
 305         int ret = 0;
 306
 307         if (format->pad)
 308                 return -EINVAL;
 309
 310         switch (mf->code) {
 311         case MEDIA_BUS_FMT_UYVY8_2X8:
 312                 val &= ~0x40;
 313                 break;
 314
 315         case MEDIA_BUS_FMT_UYVY8_1X16:
 316                 val |= 0x40;
 317                 break;
 318
 319         default:
 320                 v4l2_dbg(1, debug, sd,
 321                         "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 322                 return -EINVAL;
 323         }
 324
 325         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 326                 ret = adv7170_write(sd, 0x7, val);
 327
 328         return ret;
 329 }
 330
 331 /* ----------------------------------------------------------------------- */
 332
 333 static const struct v4l2_subdev_video_ops adv7170_video_ops = {
 334         .s_std_output = adv7170_s_std_output,
 335         .s_routing = adv7170_s_routing,
 336 };
 337
 338 static const struct v4l2_subdev_pad_ops adv7170_pad_ops = {
 339         .enum_mbus_code = adv7170_enum_mbus_code,
 340         .get_fmt = adv7170_get_fmt,
 341         .set_fmt = adv7170_set_fmt,
 342 };
 343
 344 static const struct v4l2_subdev_ops adv7170_ops = {
 345         .video = &adv7170_video_ops,
 346         .pad = &adv7170_pad_ops,
 347 };
 348
 349 /* ----------------------------------------------------------------------- */
 350
 351 static int adv7170_probe(struct i2c_client *client,
 352                         const struct i2c_device_id *id)
 353 {
 354         struct adv7170 *encoder;
 355         struct v4l2_subdev *sd;
 356         int i;
 357
 358         /* Check if the adapter supports the needed features */
 359         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 360                 return -ENODEV;
 361
 362         v4l_info(client, "chip found @ 0x%x (%s)\n",
 363                         client->addr << 1, client->adapter->name);
 364
 365         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 366         if (encoder == NULL)
 367                 return -ENOMEM;
 368         sd = &encoder->sd;
 369         v4l2_i2c_subdev_init(sd, client, &adv7170_ops);
 370         encoder->norm = V4L2_STD_NTSC;
 371         encoder->input = 0;
 372
 373         i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 374         if (i >= 0) {
 375                 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 376                 i = adv7170_write(sd, 0x07, TR0MODE);
 377                 i = adv7170_read(sd, 0x12);
 378                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 379         }
 380         if (i < 0)
 381                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 382         return 0;
 383 }
 384
 385 static int adv7170_remove(struct i2c_client *client)
 386 {
 387         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 388
 389         v4l2_device_unregister_subdev(sd);
 390         return 0;
 391 }
 392
 393 /* ----------------------------------------------------------------------- */
 394
 395 static const struct i2c_device_id adv7170_id[] = {
 396         { "adv7170", 0 },
 397         { "adv7171", 0 },
 398         { }
 399 };
 400 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 401
 402 static struct i2c_driver adv7170_driver = {
 403         .driver = {
 404                 .name   = "adv7170",
 405         },
 406         .probe          = adv7170_probe,
 407         .remove         = adv7170_remove,
 408         .id_table       = adv7170_id,
 409 };
 410
 411 module_i2c_driver(adv7170_driver);