drivers/media/video/saa7110.c

   1 /*
   2  * saa7110 - Philips SAA7110(A) video decoder driver
   3  *
   4  * Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
   5  *
   6  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   7  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   8  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   9  *
  10  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  11  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/delay.h>
  32 #include <linux/slab.h>
  33 #include <linux/wait.h>
  34 #include <asm/uaccess.h>
  35 #include <linux/i2c.h>
  36 #include <linux/videodev2.h>
  37 #include <media/v4l2-device.h>
  38 #include <media/v4l2-chip-ident.h>
  39
  40 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
  41 MODULE_AUTHOR("Pauline Middelink");
  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 #define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  50 #define SAA7110_MAX_OUTPUT      1       /* 1 YUV */
  51
  52 #define SAA7110_NR_REG          0x35
  53
  54 struct saa7110 {
  55         struct v4l2_subdev sd;
  56         u8 reg[SAA7110_NR_REG];
  57
  58         v4l2_std_id norm;
  59         int input;
  60         int enable;
  61         int bright;
  62         int contrast;
  63         int hue;
  64         int sat;
  65
  66         wait_queue_head_t wq;
  67 };
  68
  69 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
  70 {
  71         return container_of(sd, struct saa7110, sd);
  72 }
  73
  74 /* ----------------------------------------------------------------------- */
  75 /* I2C support functions                                                   */
  76 /* ----------------------------------------------------------------------- */
  77
  78 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  79 {
  80         struct i2c_client *client = v4l2_get_subdevdata(sd);
  81         struct saa7110 *decoder = to_saa7110(sd);
  82
  83         decoder->reg[reg] = value;
  84         return i2c_smbus_write_byte_data(client, reg, value);
  85 }
  86
  87 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
  88 {
  89         struct i2c_client *client = v4l2_get_subdevdata(sd);
  90         struct saa7110 *decoder = to_saa7110(sd);
  91         int ret = -1;
  92         u8 reg = *data;         /* first register to write to */
  93
  94         /* Sanity check */
  95         if (reg + (len - 1) > SAA7110_NR_REG)
  96                 return ret;
  97
  98         /* the saa7110 has an autoincrement function, use it if
  99          * the adapter understands raw I2C */
 100         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 101                 ret = i2c_master_send(client, data, len);
 102
 103                 /* Cache the written data */
 104                 memcpy(decoder->reg + reg, data + 1, len - 1);
 105         } else {
 106                 for (++data, --len; len; len--) {
 107                         ret = saa7110_write(sd, reg++, *data++);
 108                         if (ret < 0)
 109                                 break;
 110                 }
 111         }
 112
 113         return ret;
 114 }
 115
 116 static inline int saa7110_read(struct v4l2_subdev *sd)
 117 {
 118         struct i2c_client *client = v4l2_get_subdevdata(sd);
 119
 120         return i2c_smbus_read_byte(client);
 121 }
 122
 123 /* ----------------------------------------------------------------------- */
 124 /* SAA7110 functions                                                       */
 125 /* ----------------------------------------------------------------------- */
 126
 127 #define FRESP_06H_COMPST 0x03   /*0x13*/
 128 #define FRESP_06H_SVIDEO 0x83   /*0xC0*/
 129
 130
 131 static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
 132 {
 133         static const unsigned char modes[9][8] = {
 134                 /* mode 0 */
 135                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 136                               0x44, 0x75, 0x16},
 137                 /* mode 1 */
 138                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 139                               0x44, 0x75, 0x16},
 140                 /* mode 2 */
 141                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 142                               0x60, 0xB5, 0x05},
 143                 /* mode 3 */
 144                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 145                               0x60, 0xB5, 0x05},
 146                 /* mode 4 */
 147                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 148                               0x60, 0xB5, 0x03},
 149                 /* mode 5 */
 150                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 151                               0x60, 0xB5, 0x03},
 152                 /* mode 6 */
 153                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 154                               0x44, 0x75, 0x12},
 155                 /* mode 7 */
 156                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 157                               0x60, 0xB5, 0x14},
 158                 /* mode 8 */
 159                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 160                               0x44, 0x75, 0x21}
 161         };
 162         struct saa7110 *decoder = to_saa7110(sd);
 163         const unsigned char *ptr = modes[chan];
 164
 165         saa7110_write(sd, 0x06, ptr[0]);        /* Luminance control    */
 166         saa7110_write(sd, 0x20, ptr[1]);        /* Analog Control #1    */
 167         saa7110_write(sd, 0x21, ptr[2]);        /* Analog Control #2    */
 168         saa7110_write(sd, 0x22, ptr[3]);        /* Mixer Control #1     */
 169         saa7110_write(sd, 0x2C, ptr[4]);        /* Mixer Control #2     */
 170         saa7110_write(sd, 0x30, ptr[5]);        /* ADCs gain control    */
 171         saa7110_write(sd, 0x31, ptr[6]);        /* Mixer Control #3     */
 172         saa7110_write(sd, 0x21, ptr[7]);        /* Analog Control #2    */
 173         decoder->input = chan;
 174
 175         return 0;
 176 }
 177
 178 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 179         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 180         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 181         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 182         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 183         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 184         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 185         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 186 };
 187
 188 static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 189 {
 190         DEFINE_WAIT(wait);
 191         struct saa7110 *decoder = to_saa7110(sd);
 192         int status;
 193
 194         /* mode changed, start automatic detection */
 195         saa7110_write_block(sd, initseq, sizeof(initseq));
 196         saa7110_selmux(sd, decoder->input);
 197         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 198         schedule_timeout(msecs_to_jiffies(250));
 199         finish_wait(&decoder->wq, &wait);
 200         status = saa7110_read(sd);
 201         if (status & 0x40) {
 202                 v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 203                 return decoder->norm;   /* no change*/
 204         }
 205         if ((status & 3) == 0) {
 206                 saa7110_write(sd, 0x06, 0x83);
 207                 if (status & 0x20) {
 208                         v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 209                         /*saa7110_write(sd,0x2E,0x81);*/
 210                         return V4L2_STD_NTSC;
 211                 }
 212                 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 213                 /*saa7110_write(sd,0x2E,0x9A);*/
 214                 return V4L2_STD_PAL;
 215         }
 216         /*saa7110_write(sd,0x06,0x03);*/
 217         if (status & 0x20) {    /* 60Hz */
 218                 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 219                 saa7110_write(sd, 0x0D, 0x86);
 220                 saa7110_write(sd, 0x0F, 0x50);
 221                 saa7110_write(sd, 0x11, 0x2C);
 222                 /*saa7110_write(sd,0x2E,0x81);*/
 223                 return V4L2_STD_NTSC;
 224         }
 225
 226         /* 50Hz -> PAL/SECAM */
 227         saa7110_write(sd, 0x0D, 0x86);
 228         saa7110_write(sd, 0x0F, 0x10);
 229         saa7110_write(sd, 0x11, 0x59);
 230         /*saa7110_write(sd,0x2E,0x9A);*/
 231
 232         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 233         schedule_timeout(msecs_to_jiffies(250));
 234         finish_wait(&decoder->wq, &wait);
 235
 236         status = saa7110_read(sd);
 237         if ((status & 0x03) == 0x01) {
 238                 v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 239                 saa7110_write(sd, 0x0D, 0x87);
 240                 return V4L2_STD_SECAM;
 241         }
 242         v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 243         return V4L2_STD_PAL;
 244 }
 245
 246 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 247 {
 248         struct saa7110 *decoder = to_saa7110(sd);
 249         int res = V4L2_IN_ST_NO_SIGNAL;
 250         int status = saa7110_read(sd);
 251
 252         v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 253                        status, (unsigned long long)decoder->norm);
 254         if (!(status & 0x40))
 255                 res = 0;
 256         if (!(status & 0x03))
 257                 res |= V4L2_IN_ST_NO_COLOR;
 258
 259         *pstatus = res;
 260         return 0;
 261 }
 262
 263 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 264 {
 265         *(v4l2_std_id *)std = determine_norm(sd);
 266         return 0;
 267 }
 268
 269 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 270 {
 271         struct saa7110 *decoder = to_saa7110(sd);
 272
 273         if (decoder->norm != std) {
 274                 decoder->norm = std;
 275                 /*saa7110_write(sd, 0x06, 0x03);*/
 276                 if (std & V4L2_STD_NTSC) {
 277                         saa7110_write(sd, 0x0D, 0x86);
 278                         saa7110_write(sd, 0x0F, 0x50);
 279                         saa7110_write(sd, 0x11, 0x2C);
 280                         /*saa7110_write(sd, 0x2E, 0x81);*/
 281                         v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 282                 } else if (std & V4L2_STD_PAL) {
 283                         saa7110_write(sd, 0x0D, 0x86);
 284                         saa7110_write(sd, 0x0F, 0x10);
 285                         saa7110_write(sd, 0x11, 0x59);
 286                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 287                         v4l2_dbg(1, debug, sd, "switched to PAL\n");
 288                 } else if (std & V4L2_STD_SECAM) {
 289                         saa7110_write(sd, 0x0D, 0x87);
 290                         saa7110_write(sd, 0x0F, 0x10);
 291                         saa7110_write(sd, 0x11, 0x59);
 292                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 293                         v4l2_dbg(1, debug, sd, "switched to SECAM\n");
 294                 } else {
 295                         return -EINVAL;
 296                 }
 297         }
 298         return 0;
 299 }
 300
 301 static int saa7110_s_routing(struct v4l2_subdev *sd,
 302                              u32 input, u32 output, u32 config)
 303 {
 304         struct saa7110 *decoder = to_saa7110(sd);
 305
 306         if (input >= SAA7110_MAX_INPUT) {
 307                 v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
 308                 return -EINVAL;
 309         }
 310         if (decoder->input != input) {
 311                 saa7110_selmux(sd, input);
 312                 v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
 313         }
 314         return 0;
 315 }
 316
 317 static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
 318 {
 319         struct saa7110 *decoder = to_saa7110(sd);
 320
 321         if (decoder->enable != enable) {
 322                 decoder->enable = enable;
 323                 saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
 324                 v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
 325         }
 326         return 0;
 327 }
 328
 329 static int saa7110_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 330 {
 331         switch (qc->id) {
 332         case V4L2_CID_BRIGHTNESS:
 333                 return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
 334         case V4L2_CID_CONTRAST:
 335         case V4L2_CID_SATURATION:
 336                 return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
 337         case V4L2_CID_HUE:
 338                 return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 339         default:
 340                 return -EINVAL;
 341         }
 342         return 0;
 343 }
 344
 345 static int saa7110_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 346 {
 347         struct saa7110 *decoder = to_saa7110(sd);
 348
 349         switch (ctrl->id) {
 350         case V4L2_CID_BRIGHTNESS:
 351                 ctrl->value = decoder->bright;
 352                 break;
 353         case V4L2_CID_CONTRAST:
 354                 ctrl->value = decoder->contrast;
 355                 break;
 356         case V4L2_CID_SATURATION:
 357                 ctrl->value = decoder->sat;
 358                 break;
 359         case V4L2_CID_HUE:
 360                 ctrl->value = decoder->hue;
 361                 break;
 362         default:
 363                 return -EINVAL;
 364         }
 365         return 0;
 366 }
 367
 368 static int saa7110_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 369 {
 370         struct saa7110 *decoder = to_saa7110(sd);
 371
 372         switch (ctrl->id) {
 373         case V4L2_CID_BRIGHTNESS:
 374                 if (decoder->bright != ctrl->value) {
 375                         decoder->bright = ctrl->value;
 376                         saa7110_write(sd, 0x19, decoder->bright);
 377                 }
 378                 break;
 379         case V4L2_CID_CONTRAST:
 380                 if (decoder->contrast != ctrl->value) {
 381                         decoder->contrast = ctrl->value;
 382                         saa7110_write(sd, 0x13, decoder->contrast);
 383                 }
 384                 break;
 385         case V4L2_CID_SATURATION:
 386                 if (decoder->sat != ctrl->value) {
 387                         decoder->sat = ctrl->value;
 388                         saa7110_write(sd, 0x12, decoder->sat);
 389                 }
 390                 break;
 391         case V4L2_CID_HUE:
 392                 if (decoder->hue != ctrl->value) {
 393                         decoder->hue = ctrl->value;
 394                         saa7110_write(sd, 0x07, decoder->hue);
 395                 }
 396                 break;
 397         default:
 398                 return -EINVAL;
 399         }
 400         return 0;
 401 }
 402
 403 static int saa7110_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 404 {
 405         struct i2c_client *client = v4l2_get_subdevdata(sd);
 406
 407         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7110, 0);
 408 }
 409
 410 /* ----------------------------------------------------------------------- */
 411
 412 static const struct v4l2_subdev_core_ops saa7110_core_ops = {
 413         .g_chip_ident = saa7110_g_chip_ident,
 414         .g_ctrl = saa7110_g_ctrl,
 415         .s_ctrl = saa7110_s_ctrl,
 416         .queryctrl = saa7110_queryctrl,
 417         .s_std = saa7110_s_std,
 418 };
 419
 420 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 421         .s_routing = saa7110_s_routing,
 422         .s_stream = saa7110_s_stream,
 423         .querystd = saa7110_querystd,
 424         .g_input_status = saa7110_g_input_status,
 425 };
 426
 427 static const struct v4l2_subdev_ops saa7110_ops = {
 428         .core = &saa7110_core_ops,
 429         .video = &saa7110_video_ops,
 430 };
 431
 432 /* ----------------------------------------------------------------------- */
 433
 434 static int saa7110_probe(struct i2c_client *client,
 435                         const struct i2c_device_id *id)
 436 {
 437         struct saa7110 *decoder;
 438         struct v4l2_subdev *sd;
 439         int rv;
 440
 441         /* Check if the adapter supports the needed features */
 442         if (!i2c_check_functionality(client->adapter,
 443                 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 444                 return -ENODEV;
 445
 446         v4l_info(client, "chip found @ 0x%x (%s)\n",
 447                         client->addr << 1, client->adapter->name);
 448
 449         decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 450         if (!decoder)
 451                 return -ENOMEM;
 452         sd = &decoder->sd;
 453         v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 454         decoder->norm = V4L2_STD_PAL;
 455         decoder->input = 0;
 456         decoder->enable = 1;
 457         decoder->bright = 32768;
 458         decoder->contrast = 32768;
 459         decoder->hue = 32768;
 460         decoder->sat = 32768;
 461         init_waitqueue_head(&decoder->wq);
 462
 463         rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 464         if (rv < 0) {
 465                 v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 466         } else {
 467                 int ver, status;
 468                 saa7110_write(sd, 0x21, 0x10);
 469                 saa7110_write(sd, 0x0e, 0x18);
 470                 saa7110_write(sd, 0x0D, 0x04);
 471                 ver = saa7110_read(sd);
 472                 saa7110_write(sd, 0x0D, 0x06);
 473                 /*mdelay(150);*/
 474                 status = saa7110_read(sd);
 475                 v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 476                                ver, status);
 477                 saa7110_write(sd, 0x0D, 0x86);
 478                 saa7110_write(sd, 0x0F, 0x10);
 479                 saa7110_write(sd, 0x11, 0x59);
 480                 /*saa7110_write(sd, 0x2E, 0x9A);*/
 481         }
 482
 483         /*saa7110_selmux(sd,0);*/
 484         /*determine_norm(sd);*/
 485         /* setup and implicit mode 0 select has been performed */
 486
 487         return 0;
 488 }
 489
 490 static int saa7110_remove(struct i2c_client *client)
 491 {
 492         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 493
 494         v4l2_device_unregister_subdev(sd);
 495         kfree(to_saa7110(sd));
 496         return 0;
 497 }
 498
 499 /* ----------------------------------------------------------------------- */
 500
 501 static const struct i2c_device_id saa7110_id[] = {
 502         { "saa7110", 0 },
 503         { }
 504 };
 505 MODULE_DEVICE_TABLE(i2c, saa7110_id);
 506
 507 static struct i2c_driver saa7110_driver = {
 508         .driver = {
 509                 .owner  = THIS_MODULE,
 510                 .name   = "saa7110",
 511         },
 512         .probe          = saa7110_probe,
 513         .remove         = saa7110_remove,
 514         .id_table       = saa7110_id,
 515 };
 516
 517 static __init int init_saa7110(void)
 518 {
 519         return i2c_add_driver(&saa7110_driver);
 520 }
 521
 522 static __exit void exit_saa7110(void)
 523 {
 524         i2c_del_driver(&saa7110_driver);
 525 }
 526
 527 module_init(init_saa7110);
 528 module_exit(exit_saa7110);