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-legacy.h>
  40
  41 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
  42 MODULE_AUTHOR("Pauline Middelink");
  43 MODULE_LICENSE("GPL");
  44
  45 static unsigned short normal_i2c[] = { 0x9c >> 1, 0x9e >> 1, I2C_CLIENT_END };
  46
  47 I2C_CLIENT_INSMOD;
  48
  49 static int debug;
  50 module_param(debug, int, 0);
  51 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  52
  53 #define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  54 #define SAA7110_MAX_OUTPUT      1       /* 1 YUV */
  55
  56 #define SAA7110_NR_REG          0x35
  57
  58 struct saa7110 {
  59         struct v4l2_subdev sd;
  60         u8 reg[SAA7110_NR_REG];
  61
  62         v4l2_std_id norm;
  63         int input;
  64         int enable;
  65         int bright;
  66         int contrast;
  67         int hue;
  68         int sat;
  69
  70         wait_queue_head_t wq;
  71 };
  72
  73 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
  74 {
  75         return container_of(sd, struct saa7110, sd);
  76 }
  77
  78 /* ----------------------------------------------------------------------- */
  79 /* I2C support functions                                                   */
  80 /* ----------------------------------------------------------------------- */
  81
  82 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  83 {
  84         struct i2c_client *client = v4l2_get_subdevdata(sd);
  85         struct saa7110 *decoder = to_saa7110(sd);
  86
  87         decoder->reg[reg] = value;
  88         return i2c_smbus_write_byte_data(client, reg, value);
  89 }
  90
  91 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
  92 {
  93         struct i2c_client *client = v4l2_get_subdevdata(sd);
  94         struct saa7110 *decoder = to_saa7110(sd);
  95         int ret = -1;
  96         u8 reg = *data;         /* first register to write to */
  97
  98         /* Sanity check */
  99         if (reg + (len - 1) > SAA7110_NR_REG)
 100                 return ret;
 101
 102         /* the saa7110 has an autoincrement function, use it if
 103          * the adapter understands raw I2C */
 104         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 105                 ret = i2c_master_send(client, data, len);
 106
 107                 /* Cache the written data */
 108                 memcpy(decoder->reg + reg, data + 1, len - 1);
 109         } else {
 110                 for (++data, --len; len; len--) {
 111                         ret = saa7110_write(sd, reg++, *data++);
 112                         if (ret < 0)
 113                                 break;
 114                 }
 115         }
 116
 117         return ret;
 118 }
 119
 120 static inline int saa7110_read(struct v4l2_subdev *sd)
 121 {
 122         struct i2c_client *client = v4l2_get_subdevdata(sd);
 123
 124         return i2c_smbus_read_byte(client);
 125 }
 126
 127 /* ----------------------------------------------------------------------- */
 128 /* SAA7110 functions                                                       */
 129 /* ----------------------------------------------------------------------- */
 130
 131 #define FRESP_06H_COMPST 0x03   /*0x13*/
 132 #define FRESP_06H_SVIDEO 0x83   /*0xC0*/
 133
 134
 135 static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
 136 {
 137         static const unsigned char modes[9][8] = {
 138                 /* mode 0 */
 139                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 140                               0x44, 0x75, 0x16},
 141                 /* mode 1 */
 142                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 143                               0x44, 0x75, 0x16},
 144                 /* mode 2 */
 145                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 146                               0x60, 0xB5, 0x05},
 147                 /* mode 3 */
 148                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 149                               0x60, 0xB5, 0x05},
 150                 /* mode 4 */
 151                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 152                               0x60, 0xB5, 0x03},
 153                 /* mode 5 */
 154                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 155                               0x60, 0xB5, 0x03},
 156                 /* mode 6 */
 157                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 158                               0x44, 0x75, 0x12},
 159                 /* mode 7 */
 160                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 161                               0x60, 0xB5, 0x14},
 162                 /* mode 8 */
 163                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 164                               0x44, 0x75, 0x21}
 165         };
 166         struct saa7110 *decoder = to_saa7110(sd);
 167         const unsigned char *ptr = modes[chan];
 168
 169         saa7110_write(sd, 0x06, ptr[0]);        /* Luminance control    */
 170         saa7110_write(sd, 0x20, ptr[1]);        /* Analog Control #1    */
 171         saa7110_write(sd, 0x21, ptr[2]);        /* Analog Control #2    */
 172         saa7110_write(sd, 0x22, ptr[3]);        /* Mixer Control #1     */
 173         saa7110_write(sd, 0x2C, ptr[4]);        /* Mixer Control #2     */
 174         saa7110_write(sd, 0x30, ptr[5]);        /* ADCs gain control    */
 175         saa7110_write(sd, 0x31, ptr[6]);        /* Mixer Control #3     */
 176         saa7110_write(sd, 0x21, ptr[7]);        /* Analog Control #2    */
 177         decoder->input = chan;
 178
 179         return 0;
 180 }
 181
 182 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 183         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 184         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 185         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 186         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 187         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 188         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 189         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 190 };
 191
 192 static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 193 {
 194         DEFINE_WAIT(wait);
 195         struct saa7110 *decoder = to_saa7110(sd);
 196         int status;
 197
 198         /* mode changed, start automatic detection */
 199         saa7110_write_block(sd, initseq, sizeof(initseq));
 200         saa7110_selmux(sd, decoder->input);
 201         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 202         schedule_timeout(msecs_to_jiffies(250));
 203         finish_wait(&decoder->wq, &wait);
 204         status = saa7110_read(sd);
 205         if (status & 0x40) {
 206                 v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 207                 return decoder->norm;   /* no change*/
 208         }
 209         if ((status & 3) == 0) {
 210                 saa7110_write(sd, 0x06, 0x83);
 211                 if (status & 0x20) {
 212                         v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 213                         /*saa7110_write(sd,0x2E,0x81);*/
 214                         return V4L2_STD_NTSC;
 215                 }
 216                 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 217                 /*saa7110_write(sd,0x2E,0x9A);*/
 218                 return V4L2_STD_PAL;
 219         }
 220         /*saa7110_write(sd,0x06,0x03);*/
 221         if (status & 0x20) {    /* 60Hz */
 222                 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 223                 saa7110_write(sd, 0x0D, 0x86);
 224                 saa7110_write(sd, 0x0F, 0x50);
 225                 saa7110_write(sd, 0x11, 0x2C);
 226                 /*saa7110_write(sd,0x2E,0x81);*/
 227                 return V4L2_STD_NTSC;
 228         }
 229
 230         /* 50Hz -> PAL/SECAM */
 231         saa7110_write(sd, 0x0D, 0x86);
 232         saa7110_write(sd, 0x0F, 0x10);
 233         saa7110_write(sd, 0x11, 0x59);
 234         /*saa7110_write(sd,0x2E,0x9A);*/
 235
 236         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 237         schedule_timeout(msecs_to_jiffies(250));
 238         finish_wait(&decoder->wq, &wait);
 239
 240         status = saa7110_read(sd);
 241         if ((status & 0x03) == 0x01) {
 242                 v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 243                 saa7110_write(sd, 0x0D, 0x87);
 244                 return V4L2_STD_SECAM;
 245         }
 246         v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 247         return V4L2_STD_PAL;
 248 }
 249
 250 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 251 {
 252         struct saa7110 *decoder = to_saa7110(sd);
 253         int res = V4L2_IN_ST_NO_SIGNAL;
 254         int status = saa7110_read(sd);
 255
 256         v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 257                        status, decoder->norm);
 258         if (!(status & 0x40))
 259                 res = 0;
 260         if (!(status & 0x03))
 261                 res |= V4L2_IN_ST_NO_COLOR;
 262
 263         *pstatus = res;
 264         return 0;
 265 }
 266
 267 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 268 {
 269         *(v4l2_std_id *)std = determine_norm(sd);
 270         return 0;
 271 }
 272
 273 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 274 {
 275         struct saa7110 *decoder = to_saa7110(sd);
 276
 277         if (decoder->norm != std) {
 278                 decoder->norm = std;
 279                 /*saa7110_write(sd, 0x06, 0x03);*/
 280                 if (std & V4L2_STD_NTSC) {
 281                         saa7110_write(sd, 0x0D, 0x86);
 282                         saa7110_write(sd, 0x0F, 0x50);
 283                         saa7110_write(sd, 0x11, 0x2C);
 284                         /*saa7110_write(sd, 0x2E, 0x81);*/
 285                         v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 286                 } else if (std & V4L2_STD_PAL) {
 287                         saa7110_write(sd, 0x0D, 0x86);
 288                         saa7110_write(sd, 0x0F, 0x10);
 289                         saa7110_write(sd, 0x11, 0x59);
 290                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 291                         v4l2_dbg(1, debug, sd, "switched to PAL\n");
 292                 } else if (std & V4L2_STD_SECAM) {
 293                         saa7110_write(sd, 0x0D, 0x87);
 294                         saa7110_write(sd, 0x0F, 0x10);
 295                         saa7110_write(sd, 0x11, 0x59);
 296                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 297                         v4l2_dbg(1, debug, sd, "switched to SECAM\n");
 298                 } else {
 299                         return -EINVAL;
 300                 }
 301         }
 302         return 0;
 303 }
 304
 305 static int saa7110_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
 306 {
 307         struct saa7110 *decoder = to_saa7110(sd);
 308
 309         if (route->input < 0 || route->input >= SAA7110_MAX_INPUT) {
 310                 v4l2_dbg(1, debug, sd, "input=%d not available\n", route->input);
 311                 return -EINVAL;
 312         }
 313         if (decoder->input != route->input) {
 314                 saa7110_selmux(sd, route->input);
 315                 v4l2_dbg(1, debug, sd, "switched to input=%d\n", route->input);
 316         }
 317         return 0;
 318 }
 319
 320 static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
 321 {
 322         struct saa7110 *decoder = to_saa7110(sd);
 323
 324         if (decoder->enable != enable) {
 325                 decoder->enable = enable;
 326                 saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
 327                 v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
 328         }
 329         return 0;
 330 }
 331
 332 static int saa7110_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 333 {
 334         switch (qc->id) {
 335         case V4L2_CID_BRIGHTNESS:
 336                 return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
 337         case V4L2_CID_CONTRAST:
 338         case V4L2_CID_SATURATION:
 339                 return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
 340         case V4L2_CID_HUE:
 341                 return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 342         default:
 343                 return -EINVAL;
 344         }
 345         return 0;
 346 }
 347
 348 static int saa7110_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 349 {
 350         struct saa7110 *decoder = to_saa7110(sd);
 351
 352         switch (ctrl->id) {
 353         case V4L2_CID_BRIGHTNESS:
 354                 ctrl->value = decoder->bright;
 355                 break;
 356         case V4L2_CID_CONTRAST:
 357                 ctrl->value = decoder->contrast;
 358                 break;
 359         case V4L2_CID_SATURATION:
 360                 ctrl->value = decoder->sat;
 361                 break;
 362         case V4L2_CID_HUE:
 363                 ctrl->value = decoder->hue;
 364                 break;
 365         default:
 366                 return -EINVAL;
 367         }
 368         return 0;
 369 }
 370
 371 static int saa7110_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 372 {
 373         struct saa7110 *decoder = to_saa7110(sd);
 374
 375         switch (ctrl->id) {
 376         case V4L2_CID_BRIGHTNESS:
 377                 if (decoder->bright != ctrl->value) {
 378                         decoder->bright = ctrl->value;
 379                         saa7110_write(sd, 0x19, decoder->bright);
 380                 }
 381                 break;
 382         case V4L2_CID_CONTRAST:
 383                 if (decoder->contrast != ctrl->value) {
 384                         decoder->contrast = ctrl->value;
 385                         saa7110_write(sd, 0x13, decoder->contrast);
 386                 }
 387                 break;
 388         case V4L2_CID_SATURATION:
 389                 if (decoder->sat != ctrl->value) {
 390                         decoder->sat = ctrl->value;
 391                         saa7110_write(sd, 0x12, decoder->sat);
 392                 }
 393                 break;
 394         case V4L2_CID_HUE:
 395                 if (decoder->hue != ctrl->value) {
 396                         decoder->hue = ctrl->value;
 397                         saa7110_write(sd, 0x07, decoder->hue);
 398                 }
 399                 break;
 400         default:
 401                 return -EINVAL;
 402         }
 403         return 0;
 404 }
 405
 406 static int saa7110_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 407 {
 408         struct i2c_client *client = v4l2_get_subdevdata(sd);
 409
 410         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7110, 0);
 411 }
 412
 413 static int saa7110_command(struct i2c_client *client, unsigned cmd, void *arg)
 414 {
 415         return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
 416 }
 417
 418 /* ----------------------------------------------------------------------- */
 419
 420 static const struct v4l2_subdev_core_ops saa7110_core_ops = {
 421         .g_chip_ident = saa7110_g_chip_ident,
 422         .g_ctrl = saa7110_g_ctrl,
 423         .s_ctrl = saa7110_s_ctrl,
 424         .queryctrl = saa7110_queryctrl,
 425 };
 426
 427 static const struct v4l2_subdev_tuner_ops saa7110_tuner_ops = {
 428         .s_std = saa7110_s_std,
 429 };
 430
 431 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 432         .s_routing = saa7110_s_routing,
 433         .s_stream = saa7110_s_stream,
 434         .querystd = saa7110_querystd,
 435         .g_input_status = saa7110_g_input_status,
 436 };
 437
 438 static const struct v4l2_subdev_ops saa7110_ops = {
 439         .core = &saa7110_core_ops,
 440         .tuner = &saa7110_tuner_ops,
 441         .video = &saa7110_video_ops,
 442 };
 443
 444 /* ----------------------------------------------------------------------- */
 445
 446 static int saa7110_probe(struct i2c_client *client,
 447                         const struct i2c_device_id *id)
 448 {
 449         struct saa7110 *decoder;
 450         struct v4l2_subdev *sd;
 451         int rv;
 452
 453         /* Check if the adapter supports the needed features */
 454         if (!i2c_check_functionality(client->adapter,
 455                 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 456                 return -ENODEV;
 457
 458         v4l_info(client, "chip found @ 0x%x (%s)\n",
 459                         client->addr << 1, client->adapter->name);
 460
 461         decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 462         if (!decoder)
 463                 return -ENOMEM;
 464         sd = &decoder->sd;
 465         v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 466         decoder->norm = V4L2_STD_PAL;
 467         decoder->input = 0;
 468         decoder->enable = 1;
 469         decoder->bright = 32768;
 470         decoder->contrast = 32768;
 471         decoder->hue = 32768;
 472         decoder->sat = 32768;
 473         init_waitqueue_head(&decoder->wq);
 474
 475         rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 476         if (rv < 0) {
 477                 v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 478         } else {
 479                 int ver, status;
 480                 saa7110_write(sd, 0x21, 0x10);
 481                 saa7110_write(sd, 0x0e, 0x18);
 482                 saa7110_write(sd, 0x0D, 0x04);
 483                 ver = saa7110_read(sd);
 484                 saa7110_write(sd, 0x0D, 0x06);
 485                 /*mdelay(150);*/
 486                 status = saa7110_read(sd);
 487                 v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 488                                ver, status);
 489                 saa7110_write(sd, 0x0D, 0x86);
 490                 saa7110_write(sd, 0x0F, 0x10);
 491                 saa7110_write(sd, 0x11, 0x59);
 492                 /*saa7110_write(sd, 0x2E, 0x9A);*/
 493         }
 494
 495         /*saa7110_selmux(sd,0);*/
 496         /*determine_norm(sd);*/
 497         /* setup and implicit mode 0 select has been performed */
 498
 499         return 0;
 500 }
 501
 502 static int saa7110_remove(struct i2c_client *client)
 503 {
 504         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 505
 506         v4l2_device_unregister_subdev(sd);
 507         kfree(to_saa7110(sd));
 508         return 0;
 509 }
 510
 511 /* ----------------------------------------------------------------------- */
 512
 513 static const struct i2c_device_id saa7110_id[] = {
 514         { "saa7110", 0 },
 515         { }
 516 };
 517 MODULE_DEVICE_TABLE(i2c, saa7110_id);
 518
 519 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 520         .name = "saa7110",
 521         .driverid = I2C_DRIVERID_SAA7110,
 522         .command = saa7110_command,
 523         .probe = saa7110_probe,
 524         .remove = saa7110_remove,
 525         .id_table = saa7110_id,
 526 };