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
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/types.h>
  27 #include <linux/delay.h>
  28 #include <linux/slab.h>
  29 #include <linux/wait.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/i2c.h>
  32 #include <linux/videodev2.h>
  33 #include <media/v4l2-device.h>
  34 #include <media/v4l2-ctrls.h>
  35
  36 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
  37 MODULE_AUTHOR("Pauline Middelink");
  38 MODULE_LICENSE("GPL");
  39
  40
  41 static int debug;
  42 module_param(debug, int, 0);
  43 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  44
  45 #define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  46 #define SAA7110_MAX_OUTPUT      1       /* 1 YUV */
  47
  48 #define SAA7110_NR_REG          0x35
  49
  50 struct saa7110 {
  51         struct v4l2_subdev sd;
  52         struct v4l2_ctrl_handler hdl;
  53         u8 reg[SAA7110_NR_REG];
  54
  55         v4l2_std_id norm;
  56         int input;
  57         int enable;
  58
  59         wait_queue_head_t wq;
  60 };
  61
  62 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
  63 {
  64         return container_of(sd, struct saa7110, sd);
  65 }
  66
  67 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  68 {
  69         return &container_of(ctrl->handler, struct saa7110, hdl)->sd;
  70 }
  71
  72 /* ----------------------------------------------------------------------- */
  73 /* I2C support functions                                                   */
  74 /* ----------------------------------------------------------------------- */
  75
  76 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  77 {
  78         struct i2c_client *client = v4l2_get_subdevdata(sd);
  79         struct saa7110 *decoder = to_saa7110(sd);
  80
  81         decoder->reg[reg] = value;
  82         return i2c_smbus_write_byte_data(client, reg, value);
  83 }
  84
  85 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
  86 {
  87         struct i2c_client *client = v4l2_get_subdevdata(sd);
  88         struct saa7110 *decoder = to_saa7110(sd);
  89         int ret = -1;
  90         u8 reg = *data;         /* first register to write to */
  91
  92         /* Sanity check */
  93         if (reg + (len - 1) > SAA7110_NR_REG)
  94                 return ret;
  95
  96         /* the saa7110 has an autoincrement function, use it if
  97          * the adapter understands raw I2C */
  98         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  99                 ret = i2c_master_send(client, data, len);
 100
 101                 /* Cache the written data */
 102                 memcpy(decoder->reg + reg, data + 1, len - 1);
 103         } else {
 104                 for (++data, --len; len; len--) {
 105                         ret = saa7110_write(sd, reg++, *data++);
 106                         if (ret < 0)
 107                                 break;
 108                 }
 109         }
 110
 111         return ret;
 112 }
 113
 114 static inline int saa7110_read(struct v4l2_subdev *sd)
 115 {
 116         struct i2c_client *client = v4l2_get_subdevdata(sd);
 117
 118         return i2c_smbus_read_byte(client);
 119 }
 120
 121 /* ----------------------------------------------------------------------- */
 122 /* SAA7110 functions                                                       */
 123 /* ----------------------------------------------------------------------- */
 124
 125 #define FRESP_06H_COMPST 0x03   /*0x13*/
 126 #define FRESP_06H_SVIDEO 0x83   /*0xC0*/
 127
 128
 129 static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
 130 {
 131         static const unsigned char modes[9][8] = {
 132                 /* mode 0 */
 133                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 134                               0x44, 0x75, 0x16},
 135                 /* mode 1 */
 136                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 137                               0x44, 0x75, 0x16},
 138                 /* mode 2 */
 139                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 140                               0x60, 0xB5, 0x05},
 141                 /* mode 3 */
 142                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 143                               0x60, 0xB5, 0x05},
 144                 /* mode 4 */
 145                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 146                               0x60, 0xB5, 0x03},
 147                 /* mode 5 */
 148                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 149                               0x60, 0xB5, 0x03},
 150                 /* mode 6 */
 151                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 152                               0x44, 0x75, 0x12},
 153                 /* mode 7 */
 154                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 155                               0x60, 0xB5, 0x14},
 156                 /* mode 8 */
 157                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 158                               0x44, 0x75, 0x21}
 159         };
 160         struct saa7110 *decoder = to_saa7110(sd);
 161         const unsigned char *ptr = modes[chan];
 162
 163         saa7110_write(sd, 0x06, ptr[0]);        /* Luminance control    */
 164         saa7110_write(sd, 0x20, ptr[1]);        /* Analog Control #1    */
 165         saa7110_write(sd, 0x21, ptr[2]);        /* Analog Control #2    */
 166         saa7110_write(sd, 0x22, ptr[3]);        /* Mixer Control #1     */
 167         saa7110_write(sd, 0x2C, ptr[4]);        /* Mixer Control #2     */
 168         saa7110_write(sd, 0x30, ptr[5]);        /* ADCs gain control    */
 169         saa7110_write(sd, 0x31, ptr[6]);        /* Mixer Control #3     */
 170         saa7110_write(sd, 0x21, ptr[7]);        /* Analog Control #2    */
 171         decoder->input = chan;
 172
 173         return 0;
 174 }
 175
 176 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 177         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 178         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 179         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 180         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 181         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 182         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 183         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 184 };
 185
 186 static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 187 {
 188         DEFINE_WAIT(wait);
 189         struct saa7110 *decoder = to_saa7110(sd);
 190         int status;
 191
 192         /* mode changed, start automatic detection */
 193         saa7110_write_block(sd, initseq, sizeof(initseq));
 194         saa7110_selmux(sd, decoder->input);
 195         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 196         schedule_timeout(msecs_to_jiffies(250));
 197         finish_wait(&decoder->wq, &wait);
 198         status = saa7110_read(sd);
 199         if (status & 0x40) {
 200                 v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 201                 return V4L2_STD_UNKNOWN;
 202         }
 203         if ((status & 3) == 0) {
 204                 saa7110_write(sd, 0x06, 0x83);
 205                 if (status & 0x20) {
 206                         v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 207                         /*saa7110_write(sd,0x2E,0x81);*/
 208                         return V4L2_STD_NTSC;
 209                 }
 210                 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 211                 /*saa7110_write(sd,0x2E,0x9A);*/
 212                 return V4L2_STD_PAL;
 213         }
 214         /*saa7110_write(sd,0x06,0x03);*/
 215         if (status & 0x20) {    /* 60Hz */
 216                 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 217                 saa7110_write(sd, 0x0D, 0x86);
 218                 saa7110_write(sd, 0x0F, 0x50);
 219                 saa7110_write(sd, 0x11, 0x2C);
 220                 /*saa7110_write(sd,0x2E,0x81);*/
 221                 return V4L2_STD_NTSC;
 222         }
 223
 224         /* 50Hz -> PAL/SECAM */
 225         saa7110_write(sd, 0x0D, 0x86);
 226         saa7110_write(sd, 0x0F, 0x10);
 227         saa7110_write(sd, 0x11, 0x59);
 228         /*saa7110_write(sd,0x2E,0x9A);*/
 229
 230         prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 231         schedule_timeout(msecs_to_jiffies(250));
 232         finish_wait(&decoder->wq, &wait);
 233
 234         status = saa7110_read(sd);
 235         if ((status & 0x03) == 0x01) {
 236                 v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 237                 saa7110_write(sd, 0x0D, 0x87);
 238                 return V4L2_STD_SECAM;
 239         }
 240         v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 241         return V4L2_STD_PAL;
 242 }
 243
 244 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 245 {
 246         struct saa7110 *decoder = to_saa7110(sd);
 247         int res = V4L2_IN_ST_NO_SIGNAL;
 248         int status = saa7110_read(sd);
 249
 250         v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 251                        status, (unsigned long long)decoder->norm);
 252         if (!(status & 0x40))
 253                 res = 0;
 254         if (!(status & 0x03))
 255                 res |= V4L2_IN_ST_NO_COLOR;
 256
 257         *pstatus = res;
 258         return 0;
 259 }
 260
 261 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 262 {
 263         *std &= determine_norm(sd);
 264         return 0;
 265 }
 266
 267 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 268 {
 269         struct saa7110 *decoder = to_saa7110(sd);
 270
 271         if (decoder->norm != std) {
 272                 decoder->norm = std;
 273                 /*saa7110_write(sd, 0x06, 0x03);*/
 274                 if (std & V4L2_STD_NTSC) {
 275                         saa7110_write(sd, 0x0D, 0x86);
 276                         saa7110_write(sd, 0x0F, 0x50);
 277                         saa7110_write(sd, 0x11, 0x2C);
 278                         /*saa7110_write(sd, 0x2E, 0x81);*/
 279                         v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 280                 } else if (std & V4L2_STD_PAL) {
 281                         saa7110_write(sd, 0x0D, 0x86);
 282                         saa7110_write(sd, 0x0F, 0x10);
 283                         saa7110_write(sd, 0x11, 0x59);
 284                         /*saa7110_write(sd, 0x2E, 0x9A);*/
 285                         v4l2_dbg(1, debug, sd, "switched to PAL\n");
 286                 } else if (std & V4L2_STD_SECAM) {
 287                         saa7110_write(sd, 0x0D, 0x87);
 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 SECAM\n");
 292                 } else {
 293                         return -EINVAL;
 294                 }
 295         }
 296         return 0;
 297 }
 298
 299 static int saa7110_s_routing(struct v4l2_subdev *sd,
 300                              u32 input, u32 output, u32 config)
 301 {
 302         struct saa7110 *decoder = to_saa7110(sd);
 303
 304         if (input >= SAA7110_MAX_INPUT) {
 305                 v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
 306                 return -EINVAL;
 307         }
 308         if (decoder->input != input) {
 309                 saa7110_selmux(sd, input);
 310                 v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
 311         }
 312         return 0;
 313 }
 314
 315 static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
 316 {
 317         struct saa7110 *decoder = to_saa7110(sd);
 318
 319         if (decoder->enable != enable) {
 320                 decoder->enable = enable;
 321                 saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
 322                 v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
 323         }
 324         return 0;
 325 }
 326
 327 static int saa7110_s_ctrl(struct v4l2_ctrl *ctrl)
 328 {
 329         struct v4l2_subdev *sd = to_sd(ctrl);
 330
 331         switch (ctrl->id) {
 332         case V4L2_CID_BRIGHTNESS:
 333                 saa7110_write(sd, 0x19, ctrl->val);
 334                 break;
 335         case V4L2_CID_CONTRAST:
 336                 saa7110_write(sd, 0x13, ctrl->val);
 337                 break;
 338         case V4L2_CID_SATURATION:
 339                 saa7110_write(sd, 0x12, ctrl->val);
 340                 break;
 341         case V4L2_CID_HUE:
 342                 saa7110_write(sd, 0x07, ctrl->val);
 343                 break;
 344         default:
 345                 return -EINVAL;
 346         }
 347         return 0;
 348 }
 349
 350 /* ----------------------------------------------------------------------- */
 351
 352 static const struct v4l2_ctrl_ops saa7110_ctrl_ops = {
 353         .s_ctrl = saa7110_s_ctrl,
 354 };
 355
 356 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 357         .s_std = saa7110_s_std,
 358         .s_routing = saa7110_s_routing,
 359         .s_stream = saa7110_s_stream,
 360         .querystd = saa7110_querystd,
 361         .g_input_status = saa7110_g_input_status,
 362 };
 363
 364 static const struct v4l2_subdev_ops saa7110_ops = {
 365         .video = &saa7110_video_ops,
 366 };
 367
 368 /* ----------------------------------------------------------------------- */
 369
 370 static int saa7110_probe(struct i2c_client *client,
 371                         const struct i2c_device_id *id)
 372 {
 373         struct saa7110 *decoder;
 374         struct v4l2_subdev *sd;
 375         int rv;
 376
 377         /* Check if the adapter supports the needed features */
 378         if (!i2c_check_functionality(client->adapter,
 379                 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 380                 return -ENODEV;
 381
 382         v4l_info(client, "chip found @ 0x%x (%s)\n",
 383                         client->addr << 1, client->adapter->name);
 384
 385         decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
 386         if (!decoder)
 387                 return -ENOMEM;
 388         sd = &decoder->sd;
 389         v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 390         decoder->norm = V4L2_STD_PAL;
 391         decoder->input = 0;
 392         decoder->enable = 1;
 393         v4l2_ctrl_handler_init(&decoder->hdl, 2);
 394         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 395                 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 396         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 397                 V4L2_CID_CONTRAST, 0, 127, 1, 64);
 398         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 399                 V4L2_CID_SATURATION, 0, 127, 1, 64);
 400         v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
 401                 V4L2_CID_HUE, -128, 127, 1, 0);
 402         sd->ctrl_handler = &decoder->hdl;
 403         if (decoder->hdl.error) {
 404                 int err = decoder->hdl.error;
 405
 406                 v4l2_ctrl_handler_free(&decoder->hdl);
 407                 return err;
 408         }
 409         v4l2_ctrl_handler_setup(&decoder->hdl);
 410
 411         init_waitqueue_head(&decoder->wq);
 412
 413         rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 414         if (rv < 0) {
 415                 v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 416         } else {
 417                 int ver, status;
 418                 saa7110_write(sd, 0x21, 0x10);
 419                 saa7110_write(sd, 0x0e, 0x18);
 420                 saa7110_write(sd, 0x0D, 0x04);
 421                 ver = saa7110_read(sd);
 422                 saa7110_write(sd, 0x0D, 0x06);
 423                 /*mdelay(150);*/
 424                 status = saa7110_read(sd);
 425                 v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 426                                ver, status);
 427                 saa7110_write(sd, 0x0D, 0x86);
 428                 saa7110_write(sd, 0x0F, 0x10);
 429                 saa7110_write(sd, 0x11, 0x59);
 430                 /*saa7110_write(sd, 0x2E, 0x9A);*/
 431         }
 432
 433         /*saa7110_selmux(sd,0);*/
 434         /*determine_norm(sd);*/
 435         /* setup and implicit mode 0 select has been performed */
 436
 437         return 0;
 438 }
 439
 440 static int saa7110_remove(struct i2c_client *client)
 441 {
 442         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 443         struct saa7110 *decoder = to_saa7110(sd);
 444
 445         v4l2_device_unregister_subdev(sd);
 446         v4l2_ctrl_handler_free(&decoder->hdl);
 447         return 0;
 448 }
 449
 450 /* ----------------------------------------------------------------------- */
 451
 452 static const struct i2c_device_id saa7110_id[] = {
 453         { "saa7110", 0 },
 454         { }
 455 };
 456 MODULE_DEVICE_TABLE(i2c, saa7110_id);
 457
 458 static struct i2c_driver saa7110_driver = {
 459         .driver = {
 460                 .name   = "saa7110",
 461         },
 462         .probe          = saa7110_probe,
 463         .remove         = saa7110_remove,
 464         .id_table       = saa7110_id,
 465 };
 466
 467 module_i2c_driver(saa7110_driver);