drivers/media/i2c/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 <linux/uaccess.h>
  35 #include <linux/i2c.h>
  36 #include <linux/videodev2.h>
  37 #include <media/v4l2-device.h>
  38 #include <media/v4l2-ctrls.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         struct v4l2_ctrl_handler hdl;
  57         u8 reg[SAA7110_NR_REG];
  58
  59         v4l2_std_id norm;
  60         int input;
  61         int enable;
  62
  63         wait_queue_head_t wq;
  64 };
  65
  66 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
  67 {
  68         return container_of(sd, struct saa7110, sd);
  69 }
  70
  71 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  72 {
  73         return &container_of(ctrl->handler, struct saa7110, hdl)->sd;
  74 }
  75
  76 /* ----------------------------------------------------------------------- */
  77 /* I2C support functions                                                   */
  78 /* ----------------------------------------------------------------------- */
  79
  80 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  81 {
  82         struct i2c_client *client = v4l2_get_subdevdata(sd);
  83         struct saa7110 *decoder = to_saa7110(sd);
  84
  85         decoder->reg[reg] = value;
  86         return i2c_smbus_write_byte_data(client, reg, value);
  87 }
  88
  89 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
  90 {
  91         struct i2c_client *client = v4l2_get_subdevdata(sd);
  92         struct saa7110 *decoder = to_saa7110(sd);
  93         int ret = -1;
  94         u8 reg = *data;         /* first register to write to */
  95
  96         /* Sanity check */
  97         if (reg + (len - 1) > SAA7110_NR_REG)
  98                 return ret;
  99
 100         /* the saa7110 has an autoincrement function, use it if
 101          * the adapter understands raw I2C */
 102         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 103                 ret = i2c_master_send(client, data, len);
 104
 105                 /* Cache the written data */
 106                 memcpy(decoder->reg + reg, data + 1, len - 1);
 107         } else {
 108                 for (++data, --len; len; len--) {
 109                         ret = saa7110_write(sd, reg++, *data++);
 110                         if (ret < 0)
 111                                 break;
 112                 }
 113         }
 114
 115         return ret;
 116 }
 117
 118 static inline int saa7110_read(struct v4l2_subdev *sd)
 119 {
 120         struct i2c_client *client = v4l2_get_subdevdata(sd);
 121
 122         return i2c_smbus_read_byte(client);
 123 }
 124
 125 /* ----------------------------------------------------------------------- */
 126 /* SAA7110 functions                                                       */
 127 /* ----------------------------------------------------------------------- */
 128
 129 #define FRESP_06H_COMPST 0x03   /*0x13*/
 130 #define FRESP_06H_SVIDEO 0x83   /*0xC0*/
 131
 132
 133 static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
 134 {
 135         static const unsigned char modes[9][8] = {
 136                 /* mode 0 */
 137                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 138                               0x44, 0x75, 0x16},
 139                 /* mode 1 */
 140                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 141                               0x44, 0x75, 0x16},
 142                 /* mode 2 */
 143                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 144                               0x60, 0xB5, 0x05},
 145                 /* mode 3 */
 146                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 147                               0x60, 0xB5, 0x05},
 148                 /* mode 4 */
 149                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 150                               0x60, 0xB5, 0x03},
 151                 /* mode 5 */
 152                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 153                               0x60, 0xB5, 0x03},
 154                 /* mode 6 */
 155                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 156                               0x44, 0x75, 0x12},
 157                 /* mode 7 */
 158                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 159                               0x60, 0xB5, 0x14},
 160                 /* mode 8 */
 161                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 162                               0x44, 0x75, 0x21}
 163         };
 164         struct saa7110 *decoder = to_saa7110(sd);
 165         const unsigned char *ptr = modes[chan];
 166
 167         saa7110_write(sd, 0x06, ptr[0]);        /* Luminance control    */
 168         saa7110_write(sd, 0x20, ptr[1]);        /* Analog Control #1    */
 169         saa7110_write(sd, 0x21, ptr[2]);        /* Analog Control #2    */
 170         saa7110_write(sd, 0x22, ptr[3]);        /* Mixer Control #1     */
 171         saa7110_write(sd, 0x2C, ptr[4]);        /* Mixer Control #2     */
 172         saa7110_write(sd, 0x30, ptr[5]);        /* ADCs gain control    */
 173         saa7110_write(sd, 0x31, ptr[6]);        /* Mixer Control #3     */
 174         saa7110_write(sd, 0x21, ptr[7]);        /* Analog Control #2    */
 175         decoder->input = chan;
 176
 177         return 0;
 178 }
 179
 180 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 181         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 182         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 183         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 184         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 185         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 186         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 187         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 188 };
 189
 190 static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 191 {
 192         DEFINE_WAIT(wait);
 193         struct saa7110 *decoder = to_saa7110(sd);
 194         int status;
 195
 196         /* mode changed, start automatic detection */
 197         saa7110_write_block(sd, initseq, sizeof(initseq));
 198         saa7110_selmux(sd, decoder->input);
 199         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 200         schedule_timeout(msecs_to_jiffies(250));
 201         finish_wait(&decoder->wq, &wait);
 202         status = saa7110_read(sd);
 203         if (status & 0x40) {
 204                 v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 205                 return V4L2_STD_UNKNOWN;
 206         }
 207         if ((status & 3) == 0) {
 208                 saa7110_write(sd, 0x06, 0x83);
 209                 if (status & 0x20) {
 210                         v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 211                         /*saa7110_write(sd,0x2E,0x81);*/
 212                         return V4L2_STD_NTSC;
 213                 }
 214                 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 215                 /*saa7110_write(sd,0x2E,0x9A);*/
 216                 return V4L2_STD_PAL;
 217         }
 218         /*saa7110_write(sd,0x06,0x03);*/
 219         if (status & 0x20) {    /* 60Hz */
 220                 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 221                 saa7110_write(sd, 0x0D, 0x86);
 222                 saa7110_write(sd, 0x0F, 0x50);
 223                 saa7110_write(sd, 0x11, 0x2C);
 224                 /*saa7110_write(sd,0x2E,0x81);*/
 225                 return V4L2_STD_NTSC;
 226         }
 227
 228         /* 50Hz -> PAL/SECAM */
 229         saa7110_write(sd, 0x0D, 0x86);
 230         saa7110_write(sd, 0x0F, 0x10);
 231         saa7110_write(sd, 0x11, 0x59);
 232         /*saa7110_write(sd,0x2E,0x9A);*/
 233
 234         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 235         schedule_timeout(msecs_to_jiffies(250));
 236         finish_wait(&decoder->wq, &wait);
 237
 238         status = saa7110_read(sd);
 239         if ((status & 0x03) == 0x01) {
 240                 v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 241                 saa7110_write(sd, 0x0D, 0x87);
 242                 return V4L2_STD_SECAM;
 243         }
 244         v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 245         return V4L2_STD_PAL;
 246 }
 247
 248 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 249 {
 250         struct saa7110 *decoder = to_saa7110(sd);
 251         int res = V4L2_IN_ST_NO_SIGNAL;
 252         int status = saa7110_read(sd);
 253
 254         v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 255                        status, (unsigned long long)decoder->norm);
 256         if (!(status & 0x40))
 257                 res = 0;
 258         if (!(status & 0x03))
 259                 res |= V4L2_IN_ST_NO_COLOR;
 260
 261         *pstatus = res;
 262         return 0;
 263 }
 264
 265 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 266 {
 267         *std &= determine_norm(sd);
 268         return 0;
 269 }
 270
 271 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 272 {
 273         struct saa7110 *decoder = to_saa7110(sd);
 274
 275         if (decoder->norm != std) {
 276                 decoder->norm = std;
 277                 /*saa7110_write(sd, 0x06, 0x03);*/
 278                 if (std & V4L2_STD_NTSC) {
 279                         saa7110_write(sd, 0x0D, 0x86);
 280                         saa7110_write(sd, 0x0F, 0x50);
 281                         saa7110_write(sd, 0x11, 0x2C);
 282                         /*saa7110_write(sd, 0x2E, 0x81);*/
 283                         v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 284                 } else if (std & V4L2_STD_PAL) {
 285                         saa7110_write(sd, 0x0D, 0x86);
 286                         saa7110_write(sd, 0x0F, 0x10);
 287                         saa7110_write(sd, 0x11, 0x59);
 288                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 289                         v4l2_dbg(1, debug, sd, "switched to PAL\n");
 290                 } else if (std & V4L2_STD_SECAM) {
 291                         saa7110_write(sd, 0x0D, 0x87);
 292                         saa7110_write(sd, 0x0F, 0x10);
 293                         saa7110_write(sd, 0x11, 0x59);
 294                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 295                         v4l2_dbg(1, debug, sd, "switched to SECAM\n");
 296                 } else {
 297                         return -EINVAL;
 298                 }
 299         }
 300         return 0;
 301 }
 302
 303 static int saa7110_s_routing(struct v4l2_subdev *sd,
 304                              u32 input, u32 output, u32 config)
 305 {
 306         struct saa7110 *decoder = to_saa7110(sd);
 307
 308         if (input >= SAA7110_MAX_INPUT) {
 309                 v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
 310                 return -EINVAL;
 311         }
 312         if (decoder->input != input) {
 313                 saa7110_selmux(sd, input);
 314                 v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
 315         }
 316         return 0;
 317 }
 318
 319 static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
 320 {
 321         struct saa7110 *decoder = to_saa7110(sd);
 322
 323         if (decoder->enable != enable) {
 324                 decoder->enable = enable;
 325                 saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
 326                 v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
 327         }
 328         return 0;
 329 }
 330
 331 static int saa7110_s_ctrl(struct v4l2_ctrl *ctrl)
 332 {
 333         struct v4l2_subdev *sd = to_sd(ctrl);
 334
 335         switch (ctrl->id) {
 336         case V4L2_CID_BRIGHTNESS:
 337                 saa7110_write(sd, 0x19, ctrl->val);
 338                 break;
 339         case V4L2_CID_CONTRAST:
 340                 saa7110_write(sd, 0x13, ctrl->val);
 341                 break;
 342         case V4L2_CID_SATURATION:
 343                 saa7110_write(sd, 0x12, ctrl->val);
 344                 break;
 345         case V4L2_CID_HUE:
 346                 saa7110_write(sd, 0x07, ctrl->val);
 347                 break;
 348         default:
 349                 return -EINVAL;
 350         }
 351         return 0;
 352 }
 353
 354 /* ----------------------------------------------------------------------- */
 355
 356 static const struct v4l2_ctrl_ops saa7110_ctrl_ops = {
 357         .s_ctrl = saa7110_s_ctrl,
 358 };
 359
 360 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 361         .s_std = saa7110_s_std,
 362         .s_routing = saa7110_s_routing,
 363         .s_stream = saa7110_s_stream,
 364         .querystd = saa7110_querystd,
 365         .g_input_status = saa7110_g_input_status,
 366 };
 367
 368 static const struct v4l2_subdev_ops saa7110_ops = {
 369         .video = &saa7110_video_ops,
 370 };
 371
 372 /* ----------------------------------------------------------------------- */
 373
 374 static int saa7110_probe(struct i2c_client *client,
 375                         const struct i2c_device_id *id)
 376 {
 377         struct saa7110 *decoder;
 378         struct v4l2_subdev *sd;
 379         int rv;
 380
 381         /* Check if the adapter supports the needed features */
 382         if (!i2c_check_functionality(client->adapter,
 383                 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 384                 return -ENODEV;
 385
 386         v4l_info(client, "chip found @ 0x%x (%s)\n",
 387                         client->addr << 1, client->adapter->name);
 388
 389         decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
 390         if (!decoder)
 391                 return -ENOMEM;
 392         sd = &decoder->sd;
 393         v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 394         decoder->norm = V4L2_STD_PAL;
 395         decoder->input = 0;
 396         decoder->enable = 1;
 397         v4l2_ctrl_handler_init(&decoder->hdl, 2);
 398         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 399                 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 400         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 401                 V4L2_CID_CONTRAST, 0, 127, 1, 64);
 402         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 403                 V4L2_CID_SATURATION, 0, 127, 1, 64);
 404         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 405                 V4L2_CID_HUE, -128, 127, 1, 0);
 406         sd->ctrl_handler = &decoder->hdl;
 407         if (decoder->hdl.error) {
 408                 int err = decoder->hdl.error;
 409
 410                 v4l2_ctrl_handler_free(&decoder->hdl);
 411                 return err;
 412         }
 413         v4l2_ctrl_handler_setup(&decoder->hdl);
 414
 415         init_waitqueue_head(&decoder->wq);
 416
 417         rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 418         if (rv < 0) {
 419                 v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 420         } else {
 421                 int ver, status;
 422                 saa7110_write(sd, 0x21, 0x10);
 423                 saa7110_write(sd, 0x0e, 0x18);
 424                 saa7110_write(sd, 0x0D, 0x04);
 425                 ver = saa7110_read(sd);
 426                 saa7110_write(sd, 0x0D, 0x06);
 427                 /*mdelay(150);*/
 428                 status = saa7110_read(sd);
 429                 v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 430                                ver, status);
 431                 saa7110_write(sd, 0x0D, 0x86);
 432                 saa7110_write(sd, 0x0F, 0x10);
 433                 saa7110_write(sd, 0x11, 0x59);
 434                 /*saa7110_write(sd, 0x2E, 0x9A);*/
 435         }
 436
 437         /*saa7110_selmux(sd,0);*/
 438         /*determine_norm(sd);*/
 439         /* setup and implicit mode 0 select has been performed */
 440
 441         return 0;
 442 }
 443
 444 static int saa7110_remove(struct i2c_client *client)
 445 {
 446         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 447         struct saa7110 *decoder = to_saa7110(sd);
 448
 449         v4l2_device_unregister_subdev(sd);
 450         v4l2_ctrl_handler_free(&decoder->hdl);
 451         return 0;
 452 }
 453
 454 /* ----------------------------------------------------------------------- */
 455
 456 static const struct i2c_device_id saa7110_id[] = {
 457         { "saa7110", 0 },
 458         { }
 459 };
 460 MODULE_DEVICE_TABLE(i2c, saa7110_id);
 461
 462 static struct i2c_driver saa7110_driver = {
 463         .driver = {
 464                 .name   = "saa7110",
 465         },
 466         .probe          = saa7110_probe,
 467         .remove         = saa7110_remove,
 468         .id_table       = saa7110_id,
 469 };
 470
 471 module_i2c_driver(saa7110_driver);