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 <asm/uaccess.h>
  36 #include <linux/i2c.h>
  37 #include <linux/videodev2.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-chip-ident.h>
  40
  41 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  42 MODULE_AUTHOR("Maxim Yevtyushkin");
  43 MODULE_LICENSE("GPL");
  44
  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         struct v4l2_subdev sd;
  54         unsigned char reg[128];
  55
  56         v4l2_std_id norm;
  57         int input;
  58 };
  59
  60 static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)
  61 {
  62         return container_of(sd, struct adv7170, sd);
  63 }
  64
  65 static char *inputs[] = { "pass_through", "play_back" };
  66
  67 static enum v4l2_mbus_pixelcode adv7170_codes[] = {
  68         V4L2_MBUS_FMT_UYVY8_2X8,
  69         V4L2_MBUS_FMT_UYVY8_1X16,
  70 };
  71
  72 /* ----------------------------------------------------------------------- */
  73
  74 static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  75 {
  76         struct i2c_client *client = v4l2_get_subdevdata(sd);
  77         struct adv7170 *encoder = to_adv7170(sd);
  78
  79         encoder->reg[reg] = value;
  80         return i2c_smbus_write_byte_data(client, reg, value);
  81 }
  82
  83 static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg)
  84 {
  85         struct i2c_client *client = v4l2_get_subdevdata(sd);
  86
  87         return i2c_smbus_read_byte_data(client, reg);
  88 }
  89
  90 static int adv7170_write_block(struct v4l2_subdev *sd,
  91                      const u8 *data, unsigned int len)
  92 {
  93         struct i2c_client *client = v4l2_get_subdevdata(sd);
  94         struct adv7170 *encoder = to_adv7170(sd);
  95         int ret = -1;
  96         u8 reg;
  97
  98         /* the adv7170 has an autoincrement function, use it if
  99          * the adapter understands raw I2C */
 100         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 101                 /* do raw I2C, not smbus compatible */
 102                 u8 block_data[32];
 103                 int block_len;
 104
 105                 while (len >= 2) {
 106                         block_len = 0;
 107                         block_data[block_len++] = reg = data[0];
 108                         do {
 109                                 block_data[block_len++] =
 110                                     encoder->reg[reg++] = data[1];
 111                                 len -= 2;
 112                                 data += 2;
 113                         } while (len >= 2 && data[0] == reg && block_len < 32);
 114                         ret = i2c_master_send(client, block_data, block_len);
 115                         if (ret < 0)
 116                                 break;
 117                 }
 118         } else {
 119                 /* do some slow I2C emulation kind of thing */
 120                 while (len >= 2) {
 121                         reg = *data++;
 122                         ret = adv7170_write(sd, reg, *data++);
 123                         if (ret < 0)
 124                                 break;
 125                         len -= 2;
 126                 }
 127         }
 128         return ret;
 129 }
 130
 131 /* ----------------------------------------------------------------------- */
 132
 133 #define TR0MODE     0x4c
 134 #define TR0RST      0x80
 135
 136 #define TR1CAPT     0x00
 137 #define TR1PLAY     0x00
 138
 139 static const unsigned char init_NTSC[] = {
 140         0x00, 0x10,             /* MR0 */
 141         0x01, 0x20,             /* MR1 */
 142         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 143         0x03, 0x80,             /* MR3 */
 144         0x04, 0x30,             /* MR4 */
 145         0x05, 0x00,             /* Reserved */
 146         0x06, 0x00,             /* Reserved */
 147         0x07, TR0MODE,          /* TM0 */
 148         0x08, TR1CAPT,          /* TM1 */
 149         0x09, 0x16,             /* Fsc0 */
 150         0x0a, 0x7c,             /* Fsc1 */
 151         0x0b, 0xf0,             /* Fsc2 */
 152         0x0c, 0x21,             /* Fsc3 */
 153         0x0d, 0x00,             /* Subcarrier Phase */
 154         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 155         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 156         0x10, 0x00,             /* Closed Capt. 0 */
 157         0x11, 0x00,             /* Closed Capt. 1 */
 158         0x12, 0x00,             /* Pedestal Ctl 0 */
 159         0x13, 0x00,             /* Pedestal Ctl 1 */
 160         0x14, 0x00,             /* Pedestal Ctl 2 */
 161         0x15, 0x00,             /* Pedestal Ctl 3 */
 162         0x16, 0x00,             /* CGMS_WSS_0 */
 163         0x17, 0x00,             /* CGMS_WSS_1 */
 164         0x18, 0x00,             /* CGMS_WSS_2 */
 165         0x19, 0x00,             /* Teletext Ctl */
 166 };
 167
 168 static const unsigned char init_PAL[] = {
 169         0x00, 0x71,             /* MR0 */
 170         0x01, 0x20,             /* MR1 */
 171         0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 172         0x03, 0x80,             /* MR3 */
 173         0x04, 0x30,             /* MR4 */
 174         0x05, 0x00,             /* Reserved */
 175         0x06, 0x00,             /* Reserved */
 176         0x07, TR0MODE,          /* TM0 */
 177         0x08, TR1CAPT,          /* TM1 */
 178         0x09, 0xcb,             /* Fsc0 */
 179         0x0a, 0x8a,             /* Fsc1 */
 180         0x0b, 0x09,             /* Fsc2 */
 181         0x0c, 0x2a,             /* Fsc3 */
 182         0x0d, 0x00,             /* Subcarrier Phase */
 183         0x0e, 0x00,             /* Closed Capt. Ext 0 */
 184         0x0f, 0x00,             /* Closed Capt. Ext 1 */
 185         0x10, 0x00,             /* Closed Capt. 0 */
 186         0x11, 0x00,             /* Closed Capt. 1 */
 187         0x12, 0x00,             /* Pedestal Ctl 0 */
 188         0x13, 0x00,             /* Pedestal Ctl 1 */
 189         0x14, 0x00,             /* Pedestal Ctl 2 */
 190         0x15, 0x00,             /* Pedestal Ctl 3 */
 191         0x16, 0x00,             /* CGMS_WSS_0 */
 192         0x17, 0x00,             /* CGMS_WSS_1 */
 193         0x18, 0x00,             /* CGMS_WSS_2 */
 194         0x19, 0x00,             /* Teletext Ctl */
 195 };
 196
 197
 198 static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 199 {
 200         struct adv7170 *encoder = to_adv7170(sd);
 201
 202         v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 203
 204         if (std & V4L2_STD_NTSC) {
 205                 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 206                 if (encoder->input == 0)
 207                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 208                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 209                 adv7170_write(sd, 0x07, TR0MODE);
 210         } else if (std & V4L2_STD_PAL) {
 211                 adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
 212                 if (encoder->input == 0)
 213                         adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 214                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 215                 adv7170_write(sd, 0x07, TR0MODE);
 216         } else {
 217                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 218                                 (unsigned long long)std);
 219                 return -EINVAL;
 220         }
 221         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 222         encoder->norm = std;
 223         return 0;
 224 }
 225
 226 static int adv7170_s_routing(struct v4l2_subdev *sd,
 227                              u32 input, u32 output, u32 config)
 228 {
 229         struct adv7170 *encoder = to_adv7170(sd);
 230
 231         /* RJ: input = 0: input is from decoder
 232            input = 1: input is from ZR36060
 233            input = 2: color bar */
 234
 235         v4l2_dbg(1, debug, sd, "set input from %s\n",
 236                         input == 0 ? "decoder" : "ZR36060");
 237
 238         switch (input) {
 239         case 0:
 240                 adv7170_write(sd, 0x01, 0x20);
 241                 adv7170_write(sd, 0x08, TR1CAPT);       /* TR1 */
 242                 adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 243                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 244                 adv7170_write(sd, 0x07, TR0MODE);
 245                 /* udelay(10); */
 246                 break;
 247
 248         case 1:
 249                 adv7170_write(sd, 0x01, 0x00);
 250                 adv7170_write(sd, 0x08, TR1PLAY);       /* TR1 */
 251                 adv7170_write(sd, 0x02, 0x08);
 252                 adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 253                 adv7170_write(sd, 0x07, TR0MODE);
 254                 /* udelay(10); */
 255                 break;
 256
 257         default:
 258                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 259                 return -EINVAL;
 260         }
 261         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 262         encoder->input = input;
 263         return 0;
 264 }
 265
 266 static int adv7170_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 267                                 enum v4l2_mbus_pixelcode *code)
 268 {
 269         if (index >= ARRAY_SIZE(adv7170_codes))
 270                 return -EINVAL;
 271
 272         *code = adv7170_codes[index];
 273         return 0;
 274 }
 275
 276 static int adv7170_g_fmt(struct v4l2_subdev *sd,
 277                                 struct v4l2_mbus_framefmt *mf)
 278 {
 279         u8 val = adv7170_read(sd, 0x7);
 280
 281         if ((val & 0x40) == (1 << 6))
 282                 mf->code = V4L2_MBUS_FMT_UYVY8_1X16;
 283         else
 284                 mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
 285
 286         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 287         mf->width       = 0;
 288         mf->height      = 0;
 289         mf->field       = V4L2_FIELD_ANY;
 290
 291         return 0;
 292 }
 293
 294 static int adv7170_s_fmt(struct v4l2_subdev *sd,
 295                                 struct v4l2_mbus_framefmt *mf)
 296 {
 297         u8 val = adv7170_read(sd, 0x7);
 298         int ret;
 299
 300         switch (mf->code) {
 301         case V4L2_MBUS_FMT_UYVY8_2X8:
 302                 val &= ~0x40;
 303                 break;
 304
 305         case V4L2_MBUS_FMT_UYVY8_1X16:
 306                 val |= 0x40;
 307                 break;
 308
 309         default:
 310                 v4l2_dbg(1, debug, sd,
 311                         "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 312                 return -EINVAL;
 313         }
 314
 315         ret = adv7170_write(sd, 0x7, val);
 316
 317         return ret;
 318 }
 319
 320 static int adv7170_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 321 {
 322         struct i2c_client *client = v4l2_get_subdevdata(sd);
 323
 324         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7170, 0);
 325 }
 326
 327 /* ----------------------------------------------------------------------- */
 328
 329 static const struct v4l2_subdev_core_ops adv7170_core_ops = {
 330         .g_chip_ident = adv7170_g_chip_ident,
 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         .s_mbus_fmt = adv7170_s_fmt,
 337         .g_mbus_fmt = adv7170_g_fmt,
 338         .enum_mbus_fmt  = adv7170_enum_fmt,
 339 };
 340
 341 static const struct v4l2_subdev_ops adv7170_ops = {
 342         .core = &adv7170_core_ops,
 343         .video = &adv7170_video_ops,
 344 };
 345
 346 /* ----------------------------------------------------------------------- */
 347
 348 static int adv7170_probe(struct i2c_client *client,
 349                         const struct i2c_device_id *id)
 350 {
 351         struct adv7170 *encoder;
 352         struct v4l2_subdev *sd;
 353         int i;
 354
 355         /* Check if the adapter supports the needed features */
 356         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 357                 return -ENODEV;
 358
 359         v4l_info(client, "chip found @ 0x%x (%s)\n",
 360                         client->addr << 1, client->adapter->name);
 361
 362         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
 363         if (encoder == NULL)
 364                 return -ENOMEM;
 365         sd = &encoder->sd;
 366         v4l2_i2c_subdev_init(sd, client, &adv7170_ops);
 367         encoder->norm = V4L2_STD_NTSC;
 368         encoder->input = 0;
 369
 370         i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 371         if (i >= 0) {
 372                 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 373                 i = adv7170_write(sd, 0x07, TR0MODE);
 374                 i = adv7170_read(sd, 0x12);
 375                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 376         }
 377         if (i < 0)
 378                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 379         return 0;
 380 }
 381
 382 static int adv7170_remove(struct i2c_client *client)
 383 {
 384         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 385
 386         v4l2_device_unregister_subdev(sd);
 387         kfree(to_adv7170(sd));
 388         return 0;
 389 }
 390
 391 /* ----------------------------------------------------------------------- */
 392
 393 static const struct i2c_device_id adv7170_id[] = {
 394         { "adv7170", 0 },
 395         { "adv7171", 0 },
 396         { }
 397 };
 398 MODULE_DEVICE_TABLE(i2c, adv7170_id);
 399
 400 static struct i2c_driver adv7170_driver = {
 401         .driver = {
 402                 .owner  = THIS_MODULE,
 403                 .name   = "adv7170",
 404         },
 405         .probe          = adv7170_probe,
 406         .remove         = adv7170_remove,
 407         .id_table       = adv7170_id,
 408 };
 409
 410 module_i2c_driver(adv7170_driver);