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-ctrls.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         struct v4l2_ctrl_handler hdl;
  58         u8 reg[SAA7110_NR_REG];
  59
  60         v4l2_std_id norm;
  61         int input;
  62         int enable;
  63
  64         wait_queue_head_t wq;
  65 };
  66
  67 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
  68 {
  69         return container_of(sd, struct saa7110, sd);
  70 }
  71
  72 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  73 {
  74         return &container_of(ctrl->handler, struct saa7110, hdl)->sd;
  75 }
  76
  77 /* ----------------------------------------------------------------------- */
  78 /* I2C support functions                                                   */
  79 /* ----------------------------------------------------------------------- */
  80
  81 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  82 {
  83         struct i2c_client *client = v4l2_get_subdevdata(sd);
  84         struct saa7110 *decoder = to_saa7110(sd);
  85
  86         decoder->reg[reg] = value;
  87         return i2c_smbus_write_byte_data(client, reg, value);
  88 }
  89
  90 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
  91 {
  92         struct i2c_client *client = v4l2_get_subdevdata(sd);
  93         struct saa7110 *decoder = to_saa7110(sd);
  94         int ret = -1;
  95         u8 reg = *data;         /* first register to write to */
  96
  97         /* Sanity check */
  98         if (reg + (len - 1) > SAA7110_NR_REG)
  99                 return ret;
 100
 101         /* the saa7110 has an autoincrement function, use it if
 102          * the adapter understands raw I2C */
 103         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 104                 ret = i2c_master_send(client, data, len);
 105
 106                 /* Cache the written data */
 107                 memcpy(decoder->reg + reg, data + 1, len - 1);
 108         } else {
 109                 for (++data, --len; len; len--) {
 110                         ret = saa7110_write(sd, reg++, *data++);
 111                         if (ret < 0)
 112                                 break;
 113                 }
 114         }
 115
 116         return ret;
 117 }
 118
 119 static inline int saa7110_read(struct v4l2_subdev *sd)
 120 {
 121         struct i2c_client *client = v4l2_get_subdevdata(sd);
 122
 123         return i2c_smbus_read_byte(client);
 124 }
 125
 126 /* ----------------------------------------------------------------------- */
 127 /* SAA7110 functions                                                       */
 128 /* ----------------------------------------------------------------------- */
 129
 130 #define FRESP_06H_COMPST 0x03   /*0x13*/
 131 #define FRESP_06H_SVIDEO 0x83   /*0xC0*/
 132
 133
 134 static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
 135 {
 136         static const unsigned char modes[9][8] = {
 137                 /* mode 0 */
 138                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 139                               0x44, 0x75, 0x16},
 140                 /* mode 1 */
 141                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 142                               0x44, 0x75, 0x16},
 143                 /* mode 2 */
 144                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 145                               0x60, 0xB5, 0x05},
 146                 /* mode 3 */
 147                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 148                               0x60, 0xB5, 0x05},
 149                 /* mode 4 */
 150                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 151                               0x60, 0xB5, 0x03},
 152                 /* mode 5 */
 153                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 154                               0x60, 0xB5, 0x03},
 155                 /* mode 6 */
 156                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 157                               0x44, 0x75, 0x12},
 158                 /* mode 7 */
 159                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 160                               0x60, 0xB5, 0x14},
 161                 /* mode 8 */
 162                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 163                               0x44, 0x75, 0x21}
 164         };
 165         struct saa7110 *decoder = to_saa7110(sd);
 166         const unsigned char *ptr = modes[chan];
 167
 168         saa7110_write(sd, 0x06, ptr[0]);        /* Luminance control    */
 169         saa7110_write(sd, 0x20, ptr[1]);        /* Analog Control #1    */
 170         saa7110_write(sd, 0x21, ptr[2]);        /* Analog Control #2    */
 171         saa7110_write(sd, 0x22, ptr[3]);        /* Mixer Control #1     */
 172         saa7110_write(sd, 0x2C, ptr[4]);        /* Mixer Control #2     */
 173         saa7110_write(sd, 0x30, ptr[5]);        /* ADCs gain control    */
 174         saa7110_write(sd, 0x31, ptr[6]);        /* Mixer Control #3     */
 175         saa7110_write(sd, 0x21, ptr[7]);        /* Analog Control #2    */
 176         decoder->input = chan;
 177
 178         return 0;
 179 }
 180
 181 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 182         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 183         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 184         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 185         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 186         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 187         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 188         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 189 };
 190
 191 static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 192 {
 193         DEFINE_WAIT(wait);
 194         struct saa7110 *decoder = to_saa7110(sd);
 195         int status;
 196
 197         /* mode changed, start automatic detection */
 198         saa7110_write_block(sd, initseq, sizeof(initseq));
 199         saa7110_selmux(sd, decoder->input);
 200         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 201         schedule_timeout(msecs_to_jiffies(250));
 202         finish_wait(&decoder->wq, &wait);
 203         status = saa7110_read(sd);
 204         if (status & 0x40) {
 205                 v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 206                 return decoder->norm;   /* no change*/
 207         }
 208         if ((status & 3) == 0) {
 209                 saa7110_write(sd, 0x06, 0x83);
 210                 if (status & 0x20) {
 211                         v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 212                         /*saa7110_write(sd,0x2E,0x81);*/
 213                         return V4L2_STD_NTSC;
 214                 }
 215                 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 216                 /*saa7110_write(sd,0x2E,0x9A);*/
 217                 return V4L2_STD_PAL;
 218         }
 219         /*saa7110_write(sd,0x06,0x03);*/
 220         if (status & 0x20) {    /* 60Hz */
 221                 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 222                 saa7110_write(sd, 0x0D, 0x86);
 223                 saa7110_write(sd, 0x0F, 0x50);
 224                 saa7110_write(sd, 0x11, 0x2C);
 225                 /*saa7110_write(sd,0x2E,0x81);*/
 226                 return V4L2_STD_NTSC;
 227         }
 228
 229         /* 50Hz -> PAL/SECAM */
 230         saa7110_write(sd, 0x0D, 0x86);
 231         saa7110_write(sd, 0x0F, 0x10);
 232         saa7110_write(sd, 0x11, 0x59);
 233         /*saa7110_write(sd,0x2E,0x9A);*/
 234
 235         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 236         schedule_timeout(msecs_to_jiffies(250));
 237         finish_wait(&decoder->wq, &wait);
 238
 239         status = saa7110_read(sd);
 240         if ((status & 0x03) == 0x01) {
 241                 v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 242                 saa7110_write(sd, 0x0D, 0x87);
 243                 return V4L2_STD_SECAM;
 244         }
 245         v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 246         return V4L2_STD_PAL;
 247 }
 248
 249 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 250 {
 251         struct saa7110 *decoder = to_saa7110(sd);
 252         int res = V4L2_IN_ST_NO_SIGNAL;
 253         int status = saa7110_read(sd);
 254
 255         v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 256                        status, (unsigned long long)decoder->norm);
 257         if (!(status & 0x40))
 258                 res = 0;
 259         if (!(status & 0x03))
 260                 res |= V4L2_IN_ST_NO_COLOR;
 261
 262         *pstatus = res;
 263         return 0;
 264 }
 265
 266 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 267 {
 268         *(v4l2_std_id *)std = determine_norm(sd);
 269         return 0;
 270 }
 271
 272 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 273 {
 274         struct saa7110 *decoder = to_saa7110(sd);
 275
 276         if (decoder->norm != std) {
 277                 decoder->norm = std;
 278                 /*saa7110_write(sd, 0x06, 0x03);*/
 279                 if (std & V4L2_STD_NTSC) {
 280                         saa7110_write(sd, 0x0D, 0x86);
 281                         saa7110_write(sd, 0x0F, 0x50);
 282                         saa7110_write(sd, 0x11, 0x2C);
 283                         /*saa7110_write(sd, 0x2E, 0x81);*/
 284                         v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 285                 } else if (std & V4L2_STD_PAL) {
 286                         saa7110_write(sd, 0x0D, 0x86);
 287                         saa7110_write(sd, 0x0F, 0x10);
 288                         saa7110_write(sd, 0x11, 0x59);
 289                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 290                         v4l2_dbg(1, debug, sd, "switched to PAL\n");
 291                 } else if (std & V4L2_STD_SECAM) {
 292                         saa7110_write(sd, 0x0D, 0x87);
 293                         saa7110_write(sd, 0x0F, 0x10);
 294                         saa7110_write(sd, 0x11, 0x59);
 295                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 296                         v4l2_dbg(1, debug, sd, "switched to SECAM\n");
 297                 } else {
 298                         return -EINVAL;
 299                 }
 300         }
 301         return 0;
 302 }
 303
 304 static int saa7110_s_routing(struct v4l2_subdev *sd,
 305                              u32 input, u32 output, u32 config)
 306 {
 307         struct saa7110 *decoder = to_saa7110(sd);
 308
 309         if (input >= SAA7110_MAX_INPUT) {
 310                 v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
 311                 return -EINVAL;
 312         }
 313         if (decoder->input != input) {
 314                 saa7110_selmux(sd, input);
 315                 v4l2_dbg(1, debug, sd, "switched to input=%d\n", 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_s_ctrl(struct v4l2_ctrl *ctrl)
 333 {
 334         struct v4l2_subdev *sd = to_sd(ctrl);
 335
 336         switch (ctrl->id) {
 337         case V4L2_CID_BRIGHTNESS:
 338                 saa7110_write(sd, 0x19, ctrl->val);
 339                 break;
 340         case V4L2_CID_CONTRAST:
 341                 saa7110_write(sd, 0x13, ctrl->val);
 342                 break;
 343         case V4L2_CID_SATURATION:
 344                 saa7110_write(sd, 0x12, ctrl->val);
 345                 break;
 346         case V4L2_CID_HUE:
 347                 saa7110_write(sd, 0x07, ctrl->val);
 348                 break;
 349         default:
 350                 return -EINVAL;
 351         }
 352         return 0;
 353 }
 354
 355 static int saa7110_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 356 {
 357         struct i2c_client *client = v4l2_get_subdevdata(sd);
 358
 359         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7110, 0);
 360 }
 361
 362 /* ----------------------------------------------------------------------- */
 363
 364 static const struct v4l2_ctrl_ops saa7110_ctrl_ops = {
 365         .s_ctrl = saa7110_s_ctrl,
 366 };
 367
 368 static const struct v4l2_subdev_core_ops saa7110_core_ops = {
 369         .g_chip_ident = saa7110_g_chip_ident,
 370         .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
 371         .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
 372         .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
 373         .g_ctrl = v4l2_subdev_g_ctrl,
 374         .s_ctrl = v4l2_subdev_s_ctrl,
 375         .queryctrl = v4l2_subdev_queryctrl,
 376         .querymenu = v4l2_subdev_querymenu,
 377         .s_std = saa7110_s_std,
 378 };
 379
 380 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 381         .s_routing = saa7110_s_routing,
 382         .s_stream = saa7110_s_stream,
 383         .querystd = saa7110_querystd,
 384         .g_input_status = saa7110_g_input_status,
 385 };
 386
 387 static const struct v4l2_subdev_ops saa7110_ops = {
 388         .core = &saa7110_core_ops,
 389         .video = &saa7110_video_ops,
 390 };
 391
 392 /* ----------------------------------------------------------------------- */
 393
 394 static int saa7110_probe(struct i2c_client *client,
 395                         const struct i2c_device_id *id)
 396 {
 397         struct saa7110 *decoder;
 398         struct v4l2_subdev *sd;
 399         int rv;
 400
 401         /* Check if the adapter supports the needed features */
 402         if (!i2c_check_functionality(client->adapter,
 403                 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 404                 return -ENODEV;
 405
 406         v4l_info(client, "chip found @ 0x%x (%s)\n",
 407                         client->addr << 1, client->adapter->name);
 408
 409         decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 410         if (!decoder)
 411                 return -ENOMEM;
 412         sd = &decoder->sd;
 413         v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 414         decoder->norm = V4L2_STD_PAL;
 415         decoder->input = 0;
 416         decoder->enable = 1;
 417         v4l2_ctrl_handler_init(&decoder->hdl, 2);
 418         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 419                 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 420         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 421                 V4L2_CID_CONTRAST, 0, 127, 1, 64);
 422         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 423                 V4L2_CID_SATURATION, 0, 127, 1, 64);
 424         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 425                 V4L2_CID_HUE, -128, 127, 1, 0);
 426         sd->ctrl_handler = &decoder->hdl;
 427         if (decoder->hdl.error) {
 428                 int err = decoder->hdl.error;
 429
 430                 v4l2_ctrl_handler_free(&decoder->hdl);
 431                 kfree(decoder);
 432                 return err;
 433         }
 434         v4l2_ctrl_handler_setup(&decoder->hdl);
 435
 436         init_waitqueue_head(&decoder->wq);
 437
 438         rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 439         if (rv < 0) {
 440                 v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 441         } else {
 442                 int ver, status;
 443                 saa7110_write(sd, 0x21, 0x10);
 444                 saa7110_write(sd, 0x0e, 0x18);
 445                 saa7110_write(sd, 0x0D, 0x04);
 446                 ver = saa7110_read(sd);
 447                 saa7110_write(sd, 0x0D, 0x06);
 448                 /*mdelay(150);*/
 449                 status = saa7110_read(sd);
 450                 v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 451                                ver, status);
 452                 saa7110_write(sd, 0x0D, 0x86);
 453                 saa7110_write(sd, 0x0F, 0x10);
 454                 saa7110_write(sd, 0x11, 0x59);
 455                 /*saa7110_write(sd, 0x2E, 0x9A);*/
 456         }
 457
 458         /*saa7110_selmux(sd,0);*/
 459         /*determine_norm(sd);*/
 460         /* setup and implicit mode 0 select has been performed */
 461
 462         return 0;
 463 }
 464
 465 static int saa7110_remove(struct i2c_client *client)
 466 {
 467         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 468         struct saa7110 *decoder = to_saa7110(sd);
 469
 470         v4l2_device_unregister_subdev(sd);
 471         v4l2_ctrl_handler_free(&decoder->hdl);
 472         kfree(decoder);
 473         return 0;
 474 }
 475
 476 /* ----------------------------------------------------------------------- */
 477
 478 static const struct i2c_device_id saa7110_id[] = {
 479         { "saa7110", 0 },
 480         { }
 481 };
 482 MODULE_DEVICE_TABLE(i2c, saa7110_id);
 483
 484 static struct i2c_driver saa7110_driver = {
 485         .driver = {
 486                 .owner  = THIS_MODULE,
 487                 .name   = "saa7110",
 488         },
 489         .probe          = saa7110_probe,
 490         .remove         = saa7110_remove,
 491         .id_table       = saa7110_id,
 492 };
 493
 494 static __init int init_saa7110(void)
 495 {
 496         return i2c_add_driver(&saa7110_driver);
 497 }
 498
 499 static __exit void exit_saa7110(void)
 500 {
 501         i2c_del_driver(&saa7110_driver);
 502 }
 503
 504 module_init(init_saa7110);
 505 module_exit(exit_saa7110);