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 #include <media/v4l2-i2c-drv.h>
  40
  41 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
  42 MODULE_AUTHOR("Pauline Middelink");
  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 #define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  51 #define SAA7110_MAX_OUTPUT      1       /* 1 YUV */
  52
  53 #define SAA7110_NR_REG          0x35
  54
  55 struct saa7110 {
  56         struct v4l2_subdev sd;
  57         u8 reg[SAA7110_NR_REG];
  58
  59         v4l2_std_id norm;
  60         int input;
  61         int enable;
  62         int bright;
  63         int contrast;
  64         int hue;
  65         int sat;
  66
  67         wait_queue_head_t wq;
  68 };
  69
  70 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
  71 {
  72         return container_of(sd, struct saa7110, sd);
  73 }
  74
  75 /* ----------------------------------------------------------------------- */
  76 /* I2C support functions                                                   */
  77 /* ----------------------------------------------------------------------- */
  78
  79 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  80 {
  81         struct i2c_client *client = v4l2_get_subdevdata(sd);
  82         struct saa7110 *decoder = to_saa7110(sd);
  83
  84         decoder->reg[reg] = value;
  85         return i2c_smbus_write_byte_data(client, reg, value);
  86 }
  87
  88 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
  89 {
  90         struct i2c_client *client = v4l2_get_subdevdata(sd);
  91         struct saa7110 *decoder = to_saa7110(sd);
  92         int ret = -1;
  93         u8 reg = *data;         /* first register to write to */
  94
  95         /* Sanity check */
  96         if (reg + (len - 1) > SAA7110_NR_REG)
  97                 return ret;
  98
  99         /* the saa7110 has an autoincrement function, use it if
 100          * the adapter understands raw I2C */
 101         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 102                 ret = i2c_master_send(client, data, len);
 103
 104                 /* Cache the written data */
 105                 memcpy(decoder->reg + reg, data + 1, len - 1);
 106         } else {
 107                 for (++data, --len; len; len--) {
 108                         ret = saa7110_write(sd, reg++, *data++);
 109                         if (ret < 0)
 110                                 break;
 111                 }
 112         }
 113
 114         return ret;
 115 }
 116
 117 static inline int saa7110_read(struct v4l2_subdev *sd)
 118 {
 119         struct i2c_client *client = v4l2_get_subdevdata(sd);
 120
 121         return i2c_smbus_read_byte(client);
 122 }
 123
 124 /* ----------------------------------------------------------------------- */
 125 /* SAA7110 functions                                                       */
 126 /* ----------------------------------------------------------------------- */
 127
 128 #define FRESP_06H_COMPST 0x03   /*0x13*/
 129 #define FRESP_06H_SVIDEO 0x83   /*0xC0*/
 130
 131
 132 static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
 133 {
 134         static const unsigned char modes[9][8] = {
 135                 /* mode 0 */
 136                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 137                               0x44, 0x75, 0x16},
 138                 /* mode 1 */
 139                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 140                               0x44, 0x75, 0x16},
 141                 /* mode 2 */
 142                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 143                               0x60, 0xB5, 0x05},
 144                 /* mode 3 */
 145                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 146                               0x60, 0xB5, 0x05},
 147                 /* mode 4 */
 148                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 149                               0x60, 0xB5, 0x03},
 150                 /* mode 5 */
 151                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 152                               0x60, 0xB5, 0x03},
 153                 /* mode 6 */
 154                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 155                               0x44, 0x75, 0x12},
 156                 /* mode 7 */
 157                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 158                               0x60, 0xB5, 0x14},
 159                 /* mode 8 */
 160                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 161                               0x44, 0x75, 0x21}
 162         };
 163         struct saa7110 *decoder = to_saa7110(sd);
 164         const unsigned char *ptr = modes[chan];
 165
 166         saa7110_write(sd, 0x06, ptr[0]);        /* Luminance control    */
 167         saa7110_write(sd, 0x20, ptr[1]);        /* Analog Control #1    */
 168         saa7110_write(sd, 0x21, ptr[2]);        /* Analog Control #2    */
 169         saa7110_write(sd, 0x22, ptr[3]);        /* Mixer Control #1     */
 170         saa7110_write(sd, 0x2C, ptr[4]);        /* Mixer Control #2     */
 171         saa7110_write(sd, 0x30, ptr[5]);        /* ADCs gain control    */
 172         saa7110_write(sd, 0x31, ptr[6]);        /* Mixer Control #3     */
 173         saa7110_write(sd, 0x21, ptr[7]);        /* Analog Control #2    */
 174         decoder->input = chan;
 175
 176         return 0;
 177 }
 178
 179 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 180         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 181         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 182         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 183         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 184         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 185         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 186         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 187 };
 188
 189 static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 190 {
 191         DEFINE_WAIT(wait);
 192         struct saa7110 *decoder = to_saa7110(sd);
 193         int status;
 194
 195         /* mode changed, start automatic detection */
 196         saa7110_write_block(sd, initseq, sizeof(initseq));
 197         saa7110_selmux(sd, decoder->input);
 198         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 199         schedule_timeout(msecs_to_jiffies(250));
 200         finish_wait(&decoder->wq, &wait);
 201         status = saa7110_read(sd);
 202         if (status & 0x40) {
 203                 v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 204                 return decoder->norm;   /* no change*/
 205         }
 206         if ((status & 3) == 0) {
 207                 saa7110_write(sd, 0x06, 0x83);
 208                 if (status & 0x20) {
 209                         v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 210                         /*saa7110_write(sd,0x2E,0x81);*/
 211                         return V4L2_STD_NTSC;
 212                 }
 213                 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 214                 /*saa7110_write(sd,0x2E,0x9A);*/
 215                 return V4L2_STD_PAL;
 216         }
 217         /*saa7110_write(sd,0x06,0x03);*/
 218         if (status & 0x20) {    /* 60Hz */
 219                 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 220                 saa7110_write(sd, 0x0D, 0x86);
 221                 saa7110_write(sd, 0x0F, 0x50);
 222                 saa7110_write(sd, 0x11, 0x2C);
 223                 /*saa7110_write(sd,0x2E,0x81);*/
 224                 return V4L2_STD_NTSC;
 225         }
 226
 227         /* 50Hz -> PAL/SECAM */
 228         saa7110_write(sd, 0x0D, 0x86);
 229         saa7110_write(sd, 0x0F, 0x10);
 230         saa7110_write(sd, 0x11, 0x59);
 231         /*saa7110_write(sd,0x2E,0x9A);*/
 232
 233         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 234         schedule_timeout(msecs_to_jiffies(250));
 235         finish_wait(&decoder->wq, &wait);
 236
 237         status = saa7110_read(sd);
 238         if ((status & 0x03) == 0x01) {
 239                 v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 240                 saa7110_write(sd, 0x0D, 0x87);
 241                 return V4L2_STD_SECAM;
 242         }
 243         v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 244         return V4L2_STD_PAL;
 245 }
 246
 247 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 248 {
 249         struct saa7110 *decoder = to_saa7110(sd);
 250         int res = V4L2_IN_ST_NO_SIGNAL;
 251         int status = saa7110_read(sd);
 252
 253         v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 254                        status, (unsigned long long)decoder->norm);
 255         if (!(status & 0x40))
 256                 res = 0;
 257         if (!(status & 0x03))
 258                 res |= V4L2_IN_ST_NO_COLOR;
 259
 260         *pstatus = res;
 261         return 0;
 262 }
 263
 264 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 265 {
 266         *(v4l2_std_id *)std = determine_norm(sd);
 267         return 0;
 268 }
 269
 270 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 271 {
 272         struct saa7110 *decoder = to_saa7110(sd);
 273
 274         if (decoder->norm != std) {
 275                 decoder->norm = std;
 276                 /*saa7110_write(sd, 0x06, 0x03);*/
 277                 if (std & V4L2_STD_NTSC) {
 278                         saa7110_write(sd, 0x0D, 0x86);
 279                         saa7110_write(sd, 0x0F, 0x50);
 280                         saa7110_write(sd, 0x11, 0x2C);
 281                         /*saa7110_write(sd, 0x2E, 0x81);*/
 282                         v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 283                 } else if (std & V4L2_STD_PAL) {
 284                         saa7110_write(sd, 0x0D, 0x86);
 285                         saa7110_write(sd, 0x0F, 0x10);
 286                         saa7110_write(sd, 0x11, 0x59);
 287                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 288                         v4l2_dbg(1, debug, sd, "switched to PAL\n");
 289                 } else if (std & V4L2_STD_SECAM) {
 290                         saa7110_write(sd, 0x0D, 0x87);
 291                         saa7110_write(sd, 0x0F, 0x10);
 292                         saa7110_write(sd, 0x11, 0x59);
 293                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 294                         v4l2_dbg(1, debug, sd, "switched to SECAM\n");
 295                 } else {
 296                         return -EINVAL;
 297                 }
 298         }
 299         return 0;
 300 }
 301
 302 static int saa7110_s_routing(struct v4l2_subdev *sd,
 303                              u32 input, u32 output, u32 config)
 304 {
 305         struct saa7110 *decoder = to_saa7110(sd);
 306
 307         if (input >= SAA7110_MAX_INPUT) {
 308                 v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
 309                 return -EINVAL;
 310         }
 311         if (decoder->input != input) {
 312                 saa7110_selmux(sd, input);
 313                 v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
 314         }
 315         return 0;
 316 }
 317
 318 static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
 319 {
 320         struct saa7110 *decoder = to_saa7110(sd);
 321
 322         if (decoder->enable != enable) {
 323                 decoder->enable = enable;
 324                 saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
 325                 v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
 326         }
 327         return 0;
 328 }
 329
 330 static int saa7110_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 331 {
 332         switch (qc->id) {
 333         case V4L2_CID_BRIGHTNESS:
 334                 return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
 335         case V4L2_CID_CONTRAST:
 336         case V4L2_CID_SATURATION:
 337                 return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
 338         case V4L2_CID_HUE:
 339                 return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 340         default:
 341                 return -EINVAL;
 342         }
 343         return 0;
 344 }
 345
 346 static int saa7110_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 347 {
 348         struct saa7110 *decoder = to_saa7110(sd);
 349
 350         switch (ctrl->id) {
 351         case V4L2_CID_BRIGHTNESS:
 352                 ctrl->value = decoder->bright;
 353                 break;
 354         case V4L2_CID_CONTRAST:
 355                 ctrl->value = decoder->contrast;
 356                 break;
 357         case V4L2_CID_SATURATION:
 358                 ctrl->value = decoder->sat;
 359                 break;
 360         case V4L2_CID_HUE:
 361                 ctrl->value = decoder->hue;
 362                 break;
 363         default:
 364                 return -EINVAL;
 365         }
 366         return 0;
 367 }
 368
 369 static int saa7110_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 370 {
 371         struct saa7110 *decoder = to_saa7110(sd);
 372
 373         switch (ctrl->id) {
 374         case V4L2_CID_BRIGHTNESS:
 375                 if (decoder->bright != ctrl->value) {
 376                         decoder->bright = ctrl->value;
 377                         saa7110_write(sd, 0x19, decoder->bright);
 378                 }
 379                 break;
 380         case V4L2_CID_CONTRAST:
 381                 if (decoder->contrast != ctrl->value) {
 382                         decoder->contrast = ctrl->value;
 383                         saa7110_write(sd, 0x13, decoder->contrast);
 384                 }
 385                 break;
 386         case V4L2_CID_SATURATION:
 387                 if (decoder->sat != ctrl->value) {
 388                         decoder->sat = ctrl->value;
 389                         saa7110_write(sd, 0x12, decoder->sat);
 390                 }
 391                 break;
 392         case V4L2_CID_HUE:
 393                 if (decoder->hue != ctrl->value) {
 394                         decoder->hue = ctrl->value;
 395                         saa7110_write(sd, 0x07, decoder->hue);
 396                 }
 397                 break;
 398         default:
 399                 return -EINVAL;
 400         }
 401         return 0;
 402 }
 403
 404 static int saa7110_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 405 {
 406         struct i2c_client *client = v4l2_get_subdevdata(sd);
 407
 408         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7110, 0);
 409 }
 410
 411 /* ----------------------------------------------------------------------- */
 412
 413 static const struct v4l2_subdev_core_ops saa7110_core_ops = {
 414         .g_chip_ident = saa7110_g_chip_ident,
 415         .g_ctrl = saa7110_g_ctrl,
 416         .s_ctrl = saa7110_s_ctrl,
 417         .queryctrl = saa7110_queryctrl,
 418         .s_std = saa7110_s_std,
 419 };
 420
 421 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 422         .s_routing = saa7110_s_routing,
 423         .s_stream = saa7110_s_stream,
 424         .querystd = saa7110_querystd,
 425         .g_input_status = saa7110_g_input_status,
 426 };
 427
 428 static const struct v4l2_subdev_ops saa7110_ops = {
 429         .core = &saa7110_core_ops,
 430         .video = &saa7110_video_ops,
 431 };
 432
 433 /* ----------------------------------------------------------------------- */
 434
 435 static int saa7110_probe(struct i2c_client *client,
 436                         const struct i2c_device_id *id)
 437 {
 438         struct saa7110 *decoder;
 439         struct v4l2_subdev *sd;
 440         int rv;
 441
 442         /* Check if the adapter supports the needed features */
 443         if (!i2c_check_functionality(client->adapter,
 444                 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 445                 return -ENODEV;
 446
 447         v4l_info(client, "chip found @ 0x%x (%s)\n",
 448                         client->addr << 1, client->adapter->name);
 449
 450         decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 451         if (!decoder)
 452                 return -ENOMEM;
 453         sd = &decoder->sd;
 454         v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 455         decoder->norm = V4L2_STD_PAL;
 456         decoder->input = 0;
 457         decoder->enable = 1;
 458         decoder->bright = 32768;
 459         decoder->contrast = 32768;
 460         decoder->hue = 32768;
 461         decoder->sat = 32768;
 462         init_waitqueue_head(&decoder->wq);
 463
 464         rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 465         if (rv < 0) {
 466                 v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 467         } else {
 468                 int ver, status;
 469                 saa7110_write(sd, 0x21, 0x10);
 470                 saa7110_write(sd, 0x0e, 0x18);
 471                 saa7110_write(sd, 0x0D, 0x04);
 472                 ver = saa7110_read(sd);
 473                 saa7110_write(sd, 0x0D, 0x06);
 474                 /*mdelay(150);*/
 475                 status = saa7110_read(sd);
 476                 v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 477                                ver, status);
 478                 saa7110_write(sd, 0x0D, 0x86);
 479                 saa7110_write(sd, 0x0F, 0x10);
 480                 saa7110_write(sd, 0x11, 0x59);
 481                 /*saa7110_write(sd, 0x2E, 0x9A);*/
 482         }
 483
 484         /*saa7110_selmux(sd,0);*/
 485         /*determine_norm(sd);*/
 486         /* setup and implicit mode 0 select has been performed */
 487
 488         return 0;
 489 }
 490
 491 static int saa7110_remove(struct i2c_client *client)
 492 {
 493         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 494
 495         v4l2_device_unregister_subdev(sd);
 496         kfree(to_saa7110(sd));
 497         return 0;
 498 }
 499
 500 /* ----------------------------------------------------------------------- */
 501
 502 static const struct i2c_device_id saa7110_id[] = {
 503         { "saa7110", 0 },
 504         { }
 505 };
 506 MODULE_DEVICE_TABLE(i2c, saa7110_id);
 507
 508 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 509         .name = "saa7110",
 510         .probe = saa7110_probe,
 511         .remove = saa7110_remove,
 512         .id_table = saa7110_id,
 513 };