SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/vpx3220.c

   1 /*
   2  * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
   3  *
   4  * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/types.h>
  25 #include <linux/slab.h>
  26 #include <asm/uaccess.h>
  27 #include <linux/i2c.h>
  28 #include <linux/videodev2.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/v4l2-chip-ident.h>
  31 #include <media/v4l2-i2c-drv.h>
  32
  33 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
  34 MODULE_AUTHOR("Laurent Pinchart");
  35 MODULE_LICENSE("GPL");
  36
  37 static int debug;
  38 module_param(debug, int, 0);
  39 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  40
  41
  42 #define VPX_TIMEOUT_COUNT  10
  43
  44 /* ----------------------------------------------------------------------- */
  45
  46 struct vpx3220 {
  47         struct v4l2_subdev sd;
  48         unsigned char reg[255];
  49
  50         v4l2_std_id norm;
  51         int ident;
  52         int input;
  53         int enable;
  54         int bright;
  55         int contrast;
  56         int hue;
  57         int sat;
  58 };
  59
  60 static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)
  61 {
  62         return container_of(sd, struct vpx3220, sd);
  63 }
  64
  65 static char *inputs[] = { "internal", "composite", "svideo" };
  66
  67 /* ----------------------------------------------------------------------- */
  68
  69 static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  70 {
  71         struct i2c_client *client = v4l2_get_subdevdata(sd);
  72         struct vpx3220 *decoder = i2c_get_clientdata(client);
  73
  74         decoder->reg[reg] = value;
  75         return i2c_smbus_write_byte_data(client, reg, value);
  76 }
  77
  78 static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg)
  79 {
  80         struct i2c_client *client = v4l2_get_subdevdata(sd);
  81
  82         return i2c_smbus_read_byte_data(client, reg);
  83 }
  84
  85 static int vpx3220_fp_status(struct v4l2_subdev *sd)
  86 {
  87         unsigned char status;
  88         unsigned int i;
  89
  90         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
  91                 status = vpx3220_read(sd, 0x29);
  92
  93                 if (!(status & 4))
  94                         return 0;
  95
  96                 udelay(10);
  97
  98                 if (need_resched())
  99                         cond_resched();
 100         }
 101
 102         return -1;
 103 }
 104
 105 static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)
 106 {
 107         struct i2c_client *client = v4l2_get_subdevdata(sd);
 108
 109         /* Write the 16-bit address to the FPWR register */
 110         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
 111                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 112                 return -1;
 113         }
 114
 115         if (vpx3220_fp_status(sd) < 0)
 116                 return -1;
 117
 118         /* Write the 16-bit data to the FPDAT register */
 119         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
 120                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 121                 return -1;
 122         }
 123
 124         return 0;
 125 }
 126
 127 static u16 vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)
 128 {
 129         struct i2c_client *client = v4l2_get_subdevdata(sd);
 130         s16 data;
 131
 132         /* Write the 16-bit address to the FPRD register */
 133         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
 134                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 135                 return -1;
 136         }
 137
 138         if (vpx3220_fp_status(sd) < 0)
 139                 return -1;
 140
 141         /* Read the 16-bit data from the FPDAT register */
 142         data = i2c_smbus_read_word_data(client, 0x28);
 143         if (data == -1) {
 144                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
 145                 return -1;
 146         }
 147
 148         return swab16(data);
 149 }
 150
 151 static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
 152 {
 153         u8 reg;
 154         int ret = -1;
 155
 156         while (len >= 2) {
 157                 reg = *data++;
 158                 ret = vpx3220_write(sd, reg, *data++);
 159                 if (ret < 0)
 160                         break;
 161                 len -= 2;
 162         }
 163
 164         return ret;
 165 }
 166
 167 static int vpx3220_write_fp_block(struct v4l2_subdev *sd,
 168                 const u16 *data, unsigned int len)
 169 {
 170         u8 reg;
 171         int ret = 0;
 172
 173         while (len > 1) {
 174                 reg = *data++;
 175                 ret |= vpx3220_fp_write(sd, reg, *data++);
 176                 len -= 2;
 177         }
 178
 179         return ret;
 180 }
 181
 182 /* ---------------------------------------------------------------------- */
 183
 184 static const unsigned short init_ntsc[] = {
 185         0x1c, 0x00,             /* NTSC tint angle */
 186         0x88, 17,               /* Window 1 vertical */
 187         0x89, 240,              /* Vertical lines in */
 188         0x8a, 240,              /* Vertical lines out */
 189         0x8b, 000,              /* Horizontal begin */
 190         0x8c, 640,              /* Horizontal length */
 191         0x8d, 640,              /* Number of pixels */
 192         0x8f, 0xc00,            /* Disable window 2 */
 193         0xf0, 0x73,             /* 13.5 MHz transport, Forced
 194                                  * mode, latch windows */
 195         0xf2, 0x13,             /* NTSC M, composite input */
 196         0xe7, 0x1e1,            /* Enable vertical standard
 197                                  * locking @ 240 lines */
 198 };
 199
 200 static const unsigned short init_pal[] = {
 201         0x88, 23,               /* Window 1 vertical begin */
 202         0x89, 288,              /* Vertical lines in (16 lines
 203                                  * skipped by the VFE) */
 204         0x8a, 288,              /* Vertical lines out (16 lines
 205                                  * skipped by the VFE) */
 206         0x8b, 16,               /* Horizontal begin */
 207         0x8c, 768,              /* Horizontal length */
 208         0x8d, 784,              /* Number of pixels
 209                                  * Must be >= Horizontal begin + Horizontal length */
 210         0x8f, 0xc00,            /* Disable window 2 */
 211         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 212                                  * mode, latch windows */
 213         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
 214         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 215 };
 216
 217 static const unsigned short init_secam[] = {
 218         0x88, 23,               /* Window 1 vertical begin */
 219         0x89, 288,              /* Vertical lines in (16 lines
 220                                  * skipped by the VFE) */
 221         0x8a, 288,              /* Vertical lines out (16 lines
 222                                  * skipped by the VFE) */
 223         0x8b, 16,               /* Horizontal begin */
 224         0x8c, 768,              /* Horizontal length */
 225         0x8d, 784,              /* Number of pixels
 226                                  * Must be >= Horizontal begin + Horizontal length */
 227         0x8f, 0xc00,            /* Disable window 2 */
 228         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 229                                  * mode, latch windows */
 230         0xf2, 0x3d5,            /* SECAM, composite input */
 231         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 232 };
 233
 234 static const unsigned char init_common[] = {
 235         0xf2, 0x00,             /* Disable all outputs */
 236         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
 237                                  * (clamp off) */
 238         0xd8, 0xa8,             /* HREF/VREF active high, VREF
 239                                  * pulse = 2, Odd/Even flag */
 240         0x20, 0x03,             /* IF compensation 0dB/oct */
 241         0xe0, 0xff,             /* Open up all comparators */
 242         0xe1, 0x00,
 243         0xe2, 0x7f,
 244         0xe3, 0x80,
 245         0xe4, 0x7f,
 246         0xe5, 0x80,
 247         0xe6, 0x00,             /* Brightness set to 0 */
 248         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
 249                                  * 10 to 8 2-bit error diffusion */
 250         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
 251                                  * ... (p.32) */
 252         0xea, 0x18,             /* LLC2 connected, output FIFO
 253                                  * reset with VACTintern */
 254         0xf0, 0x8a,             /* Half full level to 10, bus
 255                                  * shuffler [7:0, 23:16, 15:8] */
 256         0xf1, 0x18,             /* Single clock, sync mode, no
 257                                  * FE delay, no HLEN counter */
 258         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
 259                                  * strength to 2 */
 260         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
 261                                  * ALPHA strength to 4 */
 262 };
 263
 264 static const unsigned short init_fp[] = {
 265         0x59, 0,
 266         0xa0, 2070,             /* ACC reference */
 267         0xa3, 0,
 268         0xa4, 0,
 269         0xa8, 30,
 270         0xb2, 768,
 271         0xbe, 27,
 272         0x58, 0,
 273         0x26, 0,
 274         0x4b, 0x298,            /* PLL gain */
 275 };
 276
 277
 278 static int vpx3220_init(struct v4l2_subdev *sd, u32 val)
 279 {
 280         struct vpx3220 *decoder = to_vpx3220(sd);
 281
 282         vpx3220_write_block(sd, init_common, sizeof(init_common));
 283         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 284         if (decoder->norm & V4L2_STD_NTSC)
 285                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
 286         else if (decoder->norm & V4L2_STD_PAL)
 287                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 288         else if (decoder->norm & V4L2_STD_SECAM)
 289                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
 290         else
 291                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 292         return 0;
 293 }
 294
 295 static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
 296 {
 297         int res = V4L2_IN_ST_NO_SIGNAL, status;
 298         v4l2_std_id std = 0;
 299
 300         status = vpx3220_fp_read(sd, 0x0f3);
 301
 302         v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status);
 303
 304         if (status < 0)
 305                 return status;
 306
 307         if ((status & 0x20) == 0) {
 308                 res = 0;
 309
 310                 switch (status & 0x18) {
 311                 case 0x00:
 312                 case 0x10:
 313                 case 0x14:
 314                 case 0x18:
 315                         std = V4L2_STD_PAL;
 316                         break;
 317
 318                 case 0x08:
 319                         std = V4L2_STD_SECAM;
 320                         break;
 321
 322                 case 0x04:
 323                 case 0x0c:
 324                 case 0x1c:
 325                         std = V4L2_STD_NTSC;
 326                         break;
 327                 }
 328         }
 329         if (pstd)
 330                 *pstd = std;
 331         if (pstatus)
 332                 *pstatus = status;
 333         return 0;
 334 }
 335
 336 static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 337 {
 338         v4l2_dbg(1, debug, sd, "querystd\n");
 339         return vpx3220_status(sd, NULL, std);
 340 }
 341
 342 static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status)
 343 {
 344         v4l2_dbg(1, debug, sd, "g_input_status\n");
 345         return vpx3220_status(sd, status, NULL);
 346 }
 347
 348 static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 349 {
 350         struct vpx3220 *decoder = to_vpx3220(sd);
 351         int temp_input;
 352
 353         /* Here we back up the input selection because it gets
 354            overwritten when we fill the registers with the
 355            choosen video norm */
 356         temp_input = vpx3220_fp_read(sd, 0xf2);
 357
 358         v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std);
 359         if (std & V4L2_STD_NTSC) {
 360                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
 361                 v4l2_dbg(1, debug, sd, "norm switched to NTSC\n");
 362         } else if (std & V4L2_STD_PAL) {
 363                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 364                 v4l2_dbg(1, debug, sd, "norm switched to PAL\n");
 365         } else if (std & V4L2_STD_SECAM) {
 366                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
 367                 v4l2_dbg(1, debug, sd, "norm switched to SECAM\n");
 368         } else {
 369                 return -EINVAL;
 370         }
 371
 372         decoder->norm = std;
 373
 374         /* And here we set the backed up video input again */
 375         vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010);
 376         udelay(10);
 377         return 0;
 378 }
 379
 380 static int vpx3220_s_routing(struct v4l2_subdev *sd,
 381                              u32 input, u32 output, u32 config)
 382 {
 383         int data;
 384
 385         /* RJ:   input = 0: ST8 (PCTV) input
 386                  input = 1: COMPOSITE  input
 387                  input = 2: SVHS       input  */
 388
 389         const int input_vals[3][2] = {
 390                 {0x0c, 0},
 391                 {0x0d, 0},
 392                 {0x0e, 1}
 393         };
 394
 395         if (input > 2)
 396                 return -EINVAL;
 397
 398         v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]);
 399
 400         vpx3220_write(sd, 0x33, input_vals[input][0]);
 401
 402         data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020);
 403         if (data < 0)
 404                 return data;
 405         /* 0x0010 is required to latch the setting */
 406         vpx3220_fp_write(sd, 0xf2,
 407                         data | (input_vals[input][1] << 5) | 0x0010);
 408
 409         udelay(10);
 410         return 0;
 411 }
 412
 413 static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable)
 414 {
 415         v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off");
 416
 417         vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00));
 418         return 0;
 419 }
 420
 421 static int vpx3220_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 422 {
 423         switch (qc->id) {
 424         case V4L2_CID_BRIGHTNESS:
 425                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 426                 break;
 427
 428         case V4L2_CID_CONTRAST:
 429                 v4l2_ctrl_query_fill(qc, 0, 63, 1, 32);
 430                 break;
 431
 432         case V4L2_CID_SATURATION:
 433                 v4l2_ctrl_query_fill(qc, 0, 4095, 1, 2048);
 434                 break;
 435
 436         case V4L2_CID_HUE:
 437                 v4l2_ctrl_query_fill(qc, -512, 511, 1, 0);
 438                 break;
 439
 440         default:
 441                 return -EINVAL;
 442         }
 443         return 0;
 444 }
 445
 446 static int vpx3220_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 447 {
 448         struct vpx3220 *decoder = to_vpx3220(sd);
 449
 450         switch (ctrl->id) {
 451         case V4L2_CID_BRIGHTNESS:
 452                 ctrl->value = decoder->bright;
 453                 break;
 454         case V4L2_CID_CONTRAST:
 455                 ctrl->value = decoder->contrast;
 456                 break;
 457         case V4L2_CID_SATURATION:
 458                 ctrl->value = decoder->sat;
 459                 break;
 460         case V4L2_CID_HUE:
 461                 ctrl->value = decoder->hue;
 462                 break;
 463         default:
 464                 return -EINVAL;
 465         }
 466         return 0;
 467 }
 468
 469 static int vpx3220_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 470 {
 471         struct vpx3220 *decoder = to_vpx3220(sd);
 472
 473         switch (ctrl->id) {
 474         case V4L2_CID_BRIGHTNESS:
 475                 if (decoder->bright != ctrl->value) {
 476                         decoder->bright = ctrl->value;
 477                         vpx3220_write(sd, 0xe6, decoder->bright);
 478                 }
 479                 break;
 480         case V4L2_CID_CONTRAST:
 481                 if (decoder->contrast != ctrl->value) {
 482                         /* Bit 7 and 8 is for noise shaping */
 483                         decoder->contrast = ctrl->value;
 484                         vpx3220_write(sd, 0xe7, decoder->contrast + 192);
 485                 }
 486                 break;
 487         case V4L2_CID_SATURATION:
 488                 if (decoder->sat != ctrl->value) {
 489                         decoder->sat = ctrl->value;
 490                         vpx3220_fp_write(sd, 0xa0, decoder->sat);
 491                 }
 492                 break;
 493         case V4L2_CID_HUE:
 494                 if (decoder->hue != ctrl->value) {
 495                         decoder->hue = ctrl->value;
 496                         vpx3220_fp_write(sd, 0x1c, decoder->hue);
 497                 }
 498                 break;
 499         default:
 500                 return -EINVAL;
 501         }
 502         return 0;
 503 }
 504
 505 static int vpx3220_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 506 {
 507         struct vpx3220 *decoder = to_vpx3220(sd);
 508         struct i2c_client *client = v4l2_get_subdevdata(sd);
 509
 510         return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
 511 }
 512
 513 /* ----------------------------------------------------------------------- */
 514
 515 static const struct v4l2_subdev_core_ops vpx3220_core_ops = {
 516         .g_chip_ident = vpx3220_g_chip_ident,
 517         .init = vpx3220_init,
 518         .g_ctrl = vpx3220_g_ctrl,
 519         .s_ctrl = vpx3220_s_ctrl,
 520         .queryctrl = vpx3220_queryctrl,
 521         .s_std = vpx3220_s_std,
 522 };
 523
 524 static const struct v4l2_subdev_video_ops vpx3220_video_ops = {
 525         .s_routing = vpx3220_s_routing,
 526         .s_stream = vpx3220_s_stream,
 527         .querystd = vpx3220_querystd,
 528         .g_input_status = vpx3220_g_input_status,
 529 };
 530
 531 static const struct v4l2_subdev_ops vpx3220_ops = {
 532         .core = &vpx3220_core_ops,
 533         .video = &vpx3220_video_ops,
 534 };
 535
 536 /* -----------------------------------------------------------------------
 537  * Client management code
 538  */
 539
 540 static int vpx3220_probe(struct i2c_client *client,
 541                         const struct i2c_device_id *id)
 542 {
 543         struct vpx3220 *decoder;
 544         struct v4l2_subdev *sd;
 545         const char *name = NULL;
 546         u8 ver;
 547         u16 pn;
 548
 549         /* Check if the adapter supports the needed features */
 550         if (!i2c_check_functionality(client->adapter,
 551                 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
 552                 return -ENODEV;
 553
 554         decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
 555         if (decoder == NULL)
 556                 return -ENOMEM;
 557         sd = &decoder->sd;
 558         v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);
 559         decoder->norm = V4L2_STD_PAL;
 560         decoder->input = 0;
 561         decoder->enable = 1;
 562         decoder->bright = 32768;
 563         decoder->contrast = 32768;
 564         decoder->hue = 32768;
 565         decoder->sat = 32768;
 566
 567         ver = i2c_smbus_read_byte_data(client, 0x00);
 568         pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
 569                 i2c_smbus_read_byte_data(client, 0x01);
 570         decoder->ident = V4L2_IDENT_VPX3220A;
 571         if (ver == 0xec) {
 572                 switch (pn) {
 573                 case 0x4680:
 574                         name = "vpx3220a";
 575                         break;
 576                 case 0x4260:
 577                         name = "vpx3216b";
 578                         decoder->ident = V4L2_IDENT_VPX3216B;
 579                         break;
 580                 case 0x4280:
 581                         name = "vpx3214c";
 582                         decoder->ident = V4L2_IDENT_VPX3214C;
 583                         break;
 584                 }
 585         }
 586         if (name)
 587                 v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,
 588                         client->addr << 1, client->adapter->name);
 589         else
 590                 v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",
 591                         ver, pn, client->addr << 1, client->adapter->name);
 592
 593         vpx3220_write_block(sd, init_common, sizeof(init_common));
 594         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
 595         /* Default to PAL */
 596         vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
 597         return 0;
 598 }
 599
 600 static int vpx3220_remove(struct i2c_client *client)
 601 {
 602         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 603
 604         v4l2_device_unregister_subdev(sd);
 605         kfree(to_vpx3220(sd));
 606         return 0;
 607 }
 608
 609 static const struct i2c_device_id vpx3220_id[] = {
 610         { "vpx3220a", 0 },
 611         { "vpx3216b", 0 },
 612         { "vpx3214c", 0 },
 613         { }
 614 };
 615 MODULE_DEVICE_TABLE(i2c, vpx3220_id);
 616
 617 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 618         .name = "vpx3220",
 619         .probe = vpx3220_probe,
 620         .remove = vpx3220_remove,
 621         .id_table = vpx3220_id,
 622 };