drivers/media/video/tw9910.c

   1 /*
   2  * tw9910 Video Driver
   3  *
   4  * Copyright (C) 2008 Renesas Solutions Corp.
   5  * Kuninori Morimoto <morimoto.kuninori@renesas.com>
   6  *
   7  * Based on ov772x driver,
   8  *
   9  * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
  10  * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
  11  * Copyright (C) 2008 Magnus Damm
  12  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/module.h>
  21 #include <linux/i2c.h>
  22 #include <linux/slab.h>
  23 #include <linux/kernel.h>
  24 #include <linux/delay.h>
  25 #include <linux/v4l2-mediabus.h>
  26 #include <linux/videodev2.h>
  27
  28 #include <media/soc_camera.h>
  29 #include <media/tw9910.h>
  30 #include <media/v4l2-chip-ident.h>
  31 #include <media/v4l2-subdev.h>
  32
  33 #define GET_ID(val)  ((val & 0xF8) >> 3)
  34 #define GET_REV(val) (val & 0x07)
  35
  36 /*
  37  * register offset
  38  */
  39 #define ID              0x00 /* Product ID Code Register */
  40 #define STATUS1         0x01 /* Chip Status Register I */
  41 #define INFORM          0x02 /* Input Format */
  42 #define OPFORM          0x03 /* Output Format Control Register */
  43 #define DLYCTR          0x04 /* Hysteresis and HSYNC Delay Control */
  44 #define OUTCTR1         0x05 /* Output Control I */
  45 #define ACNTL1          0x06 /* Analog Control Register 1 */
  46 #define CROP_HI         0x07 /* Cropping Register, High */
  47 #define VDELAY_LO       0x08 /* Vertical Delay Register, Low */
  48 #define VACTIVE_LO      0x09 /* Vertical Active Register, Low */
  49 #define HDELAY_LO       0x0A /* Horizontal Delay Register, Low */
  50 #define HACTIVE_LO      0x0B /* Horizontal Active Register, Low */
  51 #define CNTRL1          0x0C /* Control Register I */
  52 #define VSCALE_LO       0x0D /* Vertical Scaling Register, Low */
  53 #define SCALE_HI        0x0E /* Scaling Register, High */
  54 #define HSCALE_LO       0x0F /* Horizontal Scaling Register, Low */
  55 #define BRIGHT          0x10 /* BRIGHTNESS Control Register */
  56 #define CONTRAST        0x11 /* CONTRAST Control Register */
  57 #define SHARPNESS       0x12 /* SHARPNESS Control Register I */
  58 #define SAT_U           0x13 /* Chroma (U) Gain Register */
  59 #define SAT_V           0x14 /* Chroma (V) Gain Register */
  60 #define HUE             0x15 /* Hue Control Register */
  61 #define CORING1         0x17
  62 #define CORING2         0x18 /* Coring and IF compensation */
  63 #define VBICNTL         0x19 /* VBI Control Register */
  64 #define ACNTL2          0x1A /* Analog Control 2 */
  65 #define OUTCTR2         0x1B /* Output Control 2 */
  66 #define SDT             0x1C /* Standard Selection */
  67 #define SDTR            0x1D /* Standard Recognition */
  68 #define TEST            0x1F /* Test Control Register */
  69 #define CLMPG           0x20 /* Clamping Gain */
  70 #define IAGC            0x21 /* Individual AGC Gain */
  71 #define AGCGAIN         0x22 /* AGC Gain */
  72 #define PEAKWT          0x23 /* White Peak Threshold */
  73 #define CLMPL           0x24 /* Clamp level */
  74 #define SYNCT           0x25 /* Sync Amplitude */
  75 #define MISSCNT         0x26 /* Sync Miss Count Register */
  76 #define PCLAMP          0x27 /* Clamp Position Register */
  77 #define VCNTL1          0x28 /* Vertical Control I */
  78 #define VCNTL2          0x29 /* Vertical Control II */
  79 #define CKILL           0x2A /* Color Killer Level Control */
  80 #define COMB            0x2B /* Comb Filter Control */
  81 #define LDLY            0x2C /* Luma Delay and H Filter Control */
  82 #define MISC1           0x2D /* Miscellaneous Control I */
  83 #define LOOP            0x2E /* LOOP Control Register */
  84 #define MISC2           0x2F /* Miscellaneous Control II */
  85 #define MVSN            0x30 /* Macrovision Detection */
  86 #define STATUS2         0x31 /* Chip STATUS II */
  87 #define HFREF           0x32 /* H monitor */
  88 #define CLMD            0x33 /* CLAMP MODE */
  89 #define IDCNTL          0x34 /* ID Detection Control */
  90 #define CLCNTL1         0x35 /* Clamp Control I */
  91 #define ANAPLLCTL       0x4C
  92 #define VBIMIN          0x4D
  93 #define HSLOWCTL        0x4E
  94 #define WSS3            0x4F
  95 #define FILLDATA        0x50
  96 #define SDID            0x51
  97 #define DID             0x52
  98 #define WSS1            0x53
  99 #define WSS2            0x54
 100 #define VVBI            0x55
 101 #define LCTL6           0x56
 102 #define LCTL7           0x57
 103 #define LCTL8           0x58
 104 #define LCTL9           0x59
 105 #define LCTL10          0x5A
 106 #define LCTL11          0x5B
 107 #define LCTL12          0x5C
 108 #define LCTL13          0x5D
 109 #define LCTL14          0x5E
 110 #define LCTL15          0x5F
 111 #define LCTL16          0x60
 112 #define LCTL17          0x61
 113 #define LCTL18          0x62
 114 #define LCTL19          0x63
 115 #define LCTL20          0x64
 116 #define LCTL21          0x65
 117 #define LCTL22          0x66
 118 #define LCTL23          0x67
 119 #define LCTL24          0x68
 120 #define LCTL25          0x69
 121 #define LCTL26          0x6A
 122 #define HSBEGIN         0x6B
 123 #define HSEND           0x6C
 124 #define OVSDLY          0x6D
 125 #define OVSEND          0x6E
 126 #define VBIDELAY        0x6F
 127
 128 /*
 129  * register detail
 130  */
 131
 132 /* INFORM */
 133 #define FC27_ON     0x40 /* 1 : Input crystal clock frequency is 27MHz */
 134 #define FC27_FF     0x00 /* 0 : Square pixel mode. */
 135                          /*     Must use 24.54MHz for 60Hz field rate */
 136                          /*     source or 29.5MHz for 50Hz field rate */
 137 #define IFSEL_S     0x10 /* 01 : S-video decoding */
 138 #define IFSEL_C     0x00 /* 00 : Composite video decoding */
 139                          /* Y input video selection */
 140 #define YSEL_M0     0x00 /*  00 : Mux0 selected */
 141 #define YSEL_M1     0x04 /*  01 : Mux1 selected */
 142 #define YSEL_M2     0x08 /*  10 : Mux2 selected */
 143 #define YSEL_M3     0x10 /*  11 : Mux3 selected */
 144
 145 /* OPFORM */
 146 #define MODE        0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
 147                          /* 1 : ITU-R-656 compatible data sequence format */
 148 #define LEN         0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
 149                          /* 1 : 16-bit YCrCb 4:2:2 output format.*/
 150 #define LLCMODE     0x20 /* 1 : LLC output mode. */
 151                          /* 0 : free-run output mode */
 152 #define AINC        0x10 /* Serial interface auto-indexing control */
 153                          /* 0 : auto-increment */
 154                          /* 1 : non-auto */
 155 #define VSCTL       0x08 /* 1 : Vertical out ctrl by DVALID */
 156                          /* 0 : Vertical out ctrl by HACTIVE and DVALID */
 157 #define OEN_TRI_SEL_MASK        0x07
 158 #define OEN_TRI_SEL_ALL_ON      0x00 /* Enable output for Rev0/Rev1 */
 159 #define OEN_TRI_SEL_ALL_OFF_r0  0x06 /* All tri-stated for Rev0 */
 160 #define OEN_TRI_SEL_ALL_OFF_r1  0x07 /* All tri-stated for Rev1 */
 161
 162 /* OUTCTR1 */
 163 #define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */
 164 #define VSP_HI      0x80 /* 1 : VS pin output polarity is active high. */
 165                          /* VS pin output control */
 166 #define VSSL_VSYNC  0x00 /*   0 : VSYNC  */
 167 #define VSSL_VACT   0x10 /*   1 : VACT   */
 168 #define VSSL_FIELD  0x20 /*   2 : FIELD  */
 169 #define VSSL_VVALID 0x30 /*   3 : VVALID */
 170 #define VSSL_ZERO   0x70 /*   7 : 0      */
 171 #define HSP_LOW     0x00 /* 0 : HS pin output polarity is active low */
 172 #define HSP_HI      0x08 /* 1 : HS pin output polarity is active high.*/
 173                          /* HS pin output control */
 174 #define HSSL_HACT   0x00 /*   0 : HACT   */
 175 #define HSSL_HSYNC  0x01 /*   1 : HSYNC  */
 176 #define HSSL_DVALID 0x02 /*   2 : DVALID */
 177 #define HSSL_HLOCK  0x03 /*   3 : HLOCK  */
 178 #define HSSL_ASYNCW 0x04 /*   4 : ASYNCW */
 179 #define HSSL_ZERO   0x07 /*   7 : 0      */
 180
 181 /* ACNTL1 */
 182 #define SRESET      0x80 /* resets the device to its default state
 183                           * but all register content remain unchanged.
 184                           * This bit is self-resetting.
 185                           */
 186 #define ACNTL1_PDN_MASK 0x0e
 187 #define CLK_PDN         0x08 /* system clock power down */
 188 #define Y_PDN           0x04 /* Luma ADC power down */
 189 #define C_PDN           0x02 /* Chroma ADC power down */
 190
 191 /* ACNTL2 */
 192 #define ACNTL2_PDN_MASK 0x40
 193 #define PLL_PDN         0x40 /* PLL power down */
 194
 195 /* VBICNTL */
 196
 197 /* RTSEL : control the real time signal output from the MPOUT pin */
 198 #define RTSEL_MASK  0x07
 199 #define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
 200 #define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
 201 #define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
 202 #define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
 203 #define RTSEL_MONO  0x04 /* 0100 = MONO */
 204 #define RTSEL_DET50 0x05 /* 0101 = DET50 */
 205 #define RTSEL_FIELD 0x06 /* 0110 = FIELD */
 206 #define RTSEL_RTCO  0x07 /* 0111 = RTCO ( Real Time Control ) */
 207
 208 /* HSYNC start and end are constant for now */
 209 #define HSYNC_START     0x0260
 210 #define HSYNC_END       0x0300
 211
 212 /*
 213  * structure
 214  */
 215
 216 struct regval_list {
 217         unsigned char reg_num;
 218         unsigned char value;
 219 };
 220
 221 struct tw9910_scale_ctrl {
 222         char           *name;
 223         unsigned short  width;
 224         unsigned short  height;
 225         u16             hscale;
 226         u16             vscale;
 227 };
 228
 229 struct tw9910_priv {
 230         struct v4l2_subdev              subdev;
 231         struct tw9910_video_info        *info;
 232         const struct tw9910_scale_ctrl  *scale;
 233         v4l2_std_id                     norm;
 234         u32                             revision;
 235 };
 236
 237 static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
 238         {
 239                 .name   = "NTSC SQ",
 240                 .width  = 640,
 241                 .height = 480,
 242                 .hscale = 0x0100,
 243                 .vscale = 0x0100,
 244         },
 245         {
 246                 .name   = "NTSC CCIR601",
 247                 .width  = 720,
 248                 .height = 480,
 249                 .hscale = 0x0100,
 250                 .vscale = 0x0100,
 251         },
 252         {
 253                 .name   = "NTSC SQ (CIF)",
 254                 .width  = 320,
 255                 .height = 240,
 256                 .hscale = 0x0200,
 257                 .vscale = 0x0200,
 258         },
 259         {
 260                 .name   = "NTSC CCIR601 (CIF)",
 261                 .width  = 360,
 262                 .height = 240,
 263                 .hscale = 0x0200,
 264                 .vscale = 0x0200,
 265         },
 266         {
 267                 .name   = "NTSC SQ (QCIF)",
 268                 .width  = 160,
 269                 .height = 120,
 270                 .hscale = 0x0400,
 271                 .vscale = 0x0400,
 272         },
 273         {
 274                 .name   = "NTSC CCIR601 (QCIF)",
 275                 .width  = 180,
 276                 .height = 120,
 277                 .hscale = 0x0400,
 278                 .vscale = 0x0400,
 279         },
 280 };
 281
 282 static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
 283         {
 284                 .name   = "PAL SQ",
 285                 .width  = 768,
 286                 .height = 576,
 287                 .hscale = 0x0100,
 288                 .vscale = 0x0100,
 289         },
 290         {
 291                 .name   = "PAL CCIR601",
 292                 .width  = 720,
 293                 .height = 576,
 294                 .hscale = 0x0100,
 295                 .vscale = 0x0100,
 296         },
 297         {
 298                 .name   = "PAL SQ (CIF)",
 299                 .width  = 384,
 300                 .height = 288,
 301                 .hscale = 0x0200,
 302                 .vscale = 0x0200,
 303         },
 304         {
 305                 .name   = "PAL CCIR601 (CIF)",
 306                 .width  = 360,
 307                 .height = 288,
 308                 .hscale = 0x0200,
 309                 .vscale = 0x0200,
 310         },
 311         {
 312                 .name   = "PAL SQ (QCIF)",
 313                 .width  = 192,
 314                 .height = 144,
 315                 .hscale = 0x0400,
 316                 .vscale = 0x0400,
 317         },
 318         {
 319                 .name   = "PAL CCIR601 (QCIF)",
 320                 .width  = 180,
 321                 .height = 144,
 322                 .hscale = 0x0400,
 323                 .vscale = 0x0400,
 324         },
 325 };
 326
 327 /*
 328  * general function
 329  */
 330 static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
 331 {
 332         return container_of(i2c_get_clientdata(client), struct tw9910_priv,
 333                             subdev);
 334 }
 335
 336 static int tw9910_mask_set(struct i2c_client *client, u8 command,
 337                            u8 mask, u8 set)
 338 {
 339         s32 val = i2c_smbus_read_byte_data(client, command);
 340         if (val < 0)
 341                 return val;
 342
 343         val &= ~mask;
 344         val |= set & mask;
 345
 346         return i2c_smbus_write_byte_data(client, command, val);
 347 }
 348
 349 static int tw9910_set_scale(struct i2c_client *client,
 350                             const struct tw9910_scale_ctrl *scale)
 351 {
 352         int ret;
 353
 354         ret = i2c_smbus_write_byte_data(client, SCALE_HI,
 355                                         (scale->vscale & 0x0F00) >> 4 |
 356                                         (scale->hscale & 0x0F00) >> 8);
 357         if (ret < 0)
 358                 return ret;
 359
 360         ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
 361                                         scale->hscale & 0x00FF);
 362         if (ret < 0)
 363                 return ret;
 364
 365         ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
 366                                         scale->vscale & 0x00FF);
 367
 368         return ret;
 369 }
 370
 371 static int tw9910_set_hsync(struct i2c_client *client)
 372 {
 373         struct tw9910_priv *priv = to_tw9910(client);
 374         int ret;
 375
 376         /* bit 10 - 3 */
 377         ret = i2c_smbus_write_byte_data(client, HSBEGIN,
 378                                         (HSYNC_START & 0x07F8) >> 3);
 379         if (ret < 0)
 380                 return ret;
 381
 382         /* bit 10 - 3 */
 383         ret = i2c_smbus_write_byte_data(client, HSEND,
 384                                         (HSYNC_END & 0x07F8) >> 3);
 385         if (ret < 0)
 386                 return ret;
 387
 388         /* So far only revisions 0 and 1 have been seen */
 389         /* bit 2 - 0 */
 390         if (1 == priv->revision)
 391                 ret = tw9910_mask_set(client, HSLOWCTL, 0x77,
 392                                       (HSYNC_START & 0x0007) << 4 |
 393                                       (HSYNC_END   & 0x0007));
 394
 395         return ret;
 396 }
 397
 398 static void tw9910_reset(struct i2c_client *client)
 399 {
 400         tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
 401         msleep(1);
 402 }
 403
 404 static int tw9910_power(struct i2c_client *client, int enable)
 405 {
 406         int ret;
 407         u8 acntl1;
 408         u8 acntl2;
 409
 410         if (enable) {
 411                 acntl1 = 0;
 412                 acntl2 = 0;
 413         } else {
 414                 acntl1 = CLK_PDN | Y_PDN | C_PDN;
 415                 acntl2 = PLL_PDN;
 416         }
 417
 418         ret = tw9910_mask_set(client, ACNTL1, ACNTL1_PDN_MASK, acntl1);
 419         if (ret < 0)
 420                 return ret;
 421
 422         return tw9910_mask_set(client, ACNTL2, ACNTL2_PDN_MASK, acntl2);
 423 }
 424
 425 static const struct tw9910_scale_ctrl *tw9910_select_norm(v4l2_std_id norm,
 426                                                           u32 width, u32 height)
 427 {
 428         const struct tw9910_scale_ctrl *scale;
 429         const struct tw9910_scale_ctrl *ret = NULL;
 430         __u32 diff = 0xffffffff, tmp;
 431         int size, i;
 432
 433         if (norm & V4L2_STD_NTSC) {
 434                 scale = tw9910_ntsc_scales;
 435                 size = ARRAY_SIZE(tw9910_ntsc_scales);
 436         } else if (norm & V4L2_STD_PAL) {
 437                 scale = tw9910_pal_scales;
 438                 size = ARRAY_SIZE(tw9910_pal_scales);
 439         } else {
 440                 return NULL;
 441         }
 442
 443         for (i = 0; i < size; i++) {
 444                 tmp = abs(width - scale[i].width) +
 445                         abs(height - scale[i].height);
 446                 if (tmp < diff) {
 447                         diff = tmp;
 448                         ret = scale + i;
 449                 }
 450         }
 451
 452         return ret;
 453 }
 454
 455 /*
 456  * subdevice operations
 457  */
 458 static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
 459 {
 460         struct i2c_client *client = v4l2_get_subdevdata(sd);
 461         struct tw9910_priv *priv = to_tw9910(client);
 462         u8 val;
 463         int ret;
 464
 465         if (!enable) {
 466                 switch (priv->revision) {
 467                 case 0:
 468                         val = OEN_TRI_SEL_ALL_OFF_r0;
 469                         break;
 470                 case 1:
 471                         val = OEN_TRI_SEL_ALL_OFF_r1;
 472                         break;
 473                 default:
 474                         dev_err(&client->dev, "un-supported revision\n");
 475                         return -EINVAL;
 476                 }
 477         } else {
 478                 val = OEN_TRI_SEL_ALL_ON;
 479
 480                 if (!priv->scale) {
 481                         dev_err(&client->dev, "norm select error\n");
 482                         return -EPERM;
 483                 }
 484
 485                 dev_dbg(&client->dev, "%s %dx%d\n",
 486                         priv->scale->name,
 487                         priv->scale->width,
 488                         priv->scale->height);
 489         }
 490
 491         ret = tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
 492         if (ret < 0)
 493                 return ret;
 494
 495         return tw9910_power(client, enable);
 496 }
 497
 498 static int tw9910_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
 499 {
 500         struct i2c_client *client = v4l2_get_subdevdata(sd);
 501         struct tw9910_priv *priv = to_tw9910(client);
 502
 503         *norm = priv->norm;
 504
 505         return 0;
 506 }
 507
 508 static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 509 {
 510         struct i2c_client *client = v4l2_get_subdevdata(sd);
 511         struct tw9910_priv *priv = to_tw9910(client);
 512
 513         if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
 514                 return -EINVAL;
 515
 516         priv->norm = norm;
 517
 518         return 0;
 519 }
 520
 521 static int tw9910_g_chip_ident(struct v4l2_subdev *sd,
 522                                struct v4l2_dbg_chip_ident *id)
 523 {
 524         struct i2c_client *client = v4l2_get_subdevdata(sd);
 525         struct tw9910_priv *priv = to_tw9910(client);
 526
 527         id->ident = V4L2_IDENT_TW9910;
 528         id->revision = priv->revision;
 529
 530         return 0;
 531 }
 532
 533 #ifdef CONFIG_VIDEO_ADV_DEBUG
 534 static int tw9910_g_register(struct v4l2_subdev *sd,
 535                              struct v4l2_dbg_register *reg)
 536 {
 537         struct i2c_client *client = v4l2_get_subdevdata(sd);
 538         int ret;
 539
 540         if (reg->reg > 0xff)
 541                 return -EINVAL;
 542
 543         ret = i2c_smbus_read_byte_data(client, reg->reg);
 544         if (ret < 0)
 545                 return ret;
 546
 547         /*
 548          * ret      = int
 549          * reg->val = __u64
 550          */
 551         reg->val = (__u64)ret;
 552
 553         return 0;
 554 }
 555
 556 static int tw9910_s_register(struct v4l2_subdev *sd,
 557                              struct v4l2_dbg_register *reg)
 558 {
 559         struct i2c_client *client = v4l2_get_subdevdata(sd);
 560
 561         if (reg->reg > 0xff ||
 562             reg->val > 0xff)
 563                 return -EINVAL;
 564
 565         return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
 566 }
 567 #endif
 568
 569 static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
 570 {
 571         struct i2c_client *client = v4l2_get_subdevdata(sd);
 572         struct tw9910_priv *priv = to_tw9910(client);
 573         int ret = -EINVAL;
 574         u8 val;
 575
 576         /*
 577          * select suitable norm
 578          */
 579         priv->scale = tw9910_select_norm(priv->norm, *width, *height);
 580         if (!priv->scale)
 581                 goto tw9910_set_fmt_error;
 582
 583         /*
 584          * reset hardware
 585          */
 586         tw9910_reset(client);
 587
 588         /*
 589          * set bus width
 590          */
 591         val = 0x00;
 592         if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
 593                 val = LEN;
 594
 595         ret = tw9910_mask_set(client, OPFORM, LEN, val);
 596         if (ret < 0)
 597                 goto tw9910_set_fmt_error;
 598
 599         /*
 600          * select MPOUT behavior
 601          */
 602         switch (priv->info->mpout) {
 603         case TW9910_MPO_VLOSS:
 604                 val = RTSEL_VLOSS; break;
 605         case TW9910_MPO_HLOCK:
 606                 val = RTSEL_HLOCK; break;
 607         case TW9910_MPO_SLOCK:
 608                 val = RTSEL_SLOCK; break;
 609         case TW9910_MPO_VLOCK:
 610                 val = RTSEL_VLOCK; break;
 611         case TW9910_MPO_MONO:
 612                 val = RTSEL_MONO;  break;
 613         case TW9910_MPO_DET50:
 614                 val = RTSEL_DET50; break;
 615         case TW9910_MPO_FIELD:
 616                 val = RTSEL_FIELD; break;
 617         case TW9910_MPO_RTCO:
 618                 val = RTSEL_RTCO;  break;
 619         default:
 620                 val = 0;
 621         }
 622
 623         ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
 624         if (ret < 0)
 625                 goto tw9910_set_fmt_error;
 626
 627         /*
 628          * set scale
 629          */
 630         ret = tw9910_set_scale(client, priv->scale);
 631         if (ret < 0)
 632                 goto tw9910_set_fmt_error;
 633
 634         /*
 635          * set hsync
 636          */
 637         ret = tw9910_set_hsync(client);
 638         if (ret < 0)
 639                 goto tw9910_set_fmt_error;
 640
 641         *width = priv->scale->width;
 642         *height = priv->scale->height;
 643
 644         return ret;
 645
 646 tw9910_set_fmt_error:
 647
 648         tw9910_reset(client);
 649         priv->scale = NULL;
 650
 651         return ret;
 652 }
 653
 654 static int tw9910_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 655 {
 656         struct i2c_client *client = v4l2_get_subdevdata(sd);
 657         struct tw9910_priv *priv = to_tw9910(client);
 658
 659         a->c.left       = 0;
 660         a->c.top        = 0;
 661         if (priv->norm & V4L2_STD_NTSC) {
 662                 a->c.width      = 640;
 663                 a->c.height     = 480;
 664         } else {
 665                 a->c.width      = 768;
 666                 a->c.height     = 576;
 667         }
 668         a->type         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 669
 670         return 0;
 671 }
 672
 673 static int tw9910_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 674 {
 675         struct i2c_client *client = v4l2_get_subdevdata(sd);
 676         struct tw9910_priv *priv = to_tw9910(client);
 677
 678         a->bounds.left                  = 0;
 679         a->bounds.top                   = 0;
 680         if (priv->norm & V4L2_STD_NTSC) {
 681                 a->bounds.width         = 640;
 682                 a->bounds.height        = 480;
 683         } else {
 684                 a->bounds.width         = 768;
 685                 a->bounds.height        = 576;
 686         }
 687         a->defrect                      = a->bounds;
 688         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 689         a->pixelaspect.numerator        = 1;
 690         a->pixelaspect.denominator      = 1;
 691
 692         return 0;
 693 }
 694
 695 static int tw9910_g_fmt(struct v4l2_subdev *sd,
 696                         struct v4l2_mbus_framefmt *mf)
 697 {
 698         struct i2c_client *client = v4l2_get_subdevdata(sd);
 699         struct tw9910_priv *priv = to_tw9910(client);
 700
 701         if (!priv->scale) {
 702                 int ret;
 703                 u32 width = 640, height = 480;
 704                 ret = tw9910_set_frame(sd, &width, &height);
 705                 if (ret < 0)
 706                         return ret;
 707         }
 708
 709         mf->width       = priv->scale->width;
 710         mf->height      = priv->scale->height;
 711         mf->code        = V4L2_MBUS_FMT_UYVY8_2X8;
 712         mf->colorspace  = V4L2_COLORSPACE_JPEG;
 713         mf->field       = V4L2_FIELD_INTERLACED_BT;
 714
 715         return 0;
 716 }
 717
 718 static int tw9910_s_fmt(struct v4l2_subdev *sd,
 719                         struct v4l2_mbus_framefmt *mf)
 720 {
 721         u32 width = mf->width, height = mf->height;
 722         int ret;
 723
 724         WARN_ON(mf->field != V4L2_FIELD_ANY &&
 725                 mf->field != V4L2_FIELD_INTERLACED_BT);
 726
 727         /*
 728          * check color format
 729          */
 730         if (mf->code != V4L2_MBUS_FMT_UYVY8_2X8)
 731                 return -EINVAL;
 732
 733         mf->colorspace = V4L2_COLORSPACE_JPEG;
 734
 735         ret = tw9910_set_frame(sd, &width, &height);
 736         if (!ret) {
 737                 mf->width       = width;
 738                 mf->height      = height;
 739         }
 740         return ret;
 741 }
 742
 743 static int tw9910_try_fmt(struct v4l2_subdev *sd,
 744                           struct v4l2_mbus_framefmt *mf)
 745 {
 746         struct i2c_client *client = v4l2_get_subdevdata(sd);
 747         struct tw9910_priv *priv = to_tw9910(client);
 748         const struct tw9910_scale_ctrl *scale;
 749
 750         if (V4L2_FIELD_ANY == mf->field) {
 751                 mf->field = V4L2_FIELD_INTERLACED_BT;
 752         } else if (V4L2_FIELD_INTERLACED_BT != mf->field) {
 753                 dev_err(&client->dev, "Field type %d invalid.\n", mf->field);
 754                 return -EINVAL;
 755         }
 756
 757         mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
 758         mf->colorspace = V4L2_COLORSPACE_JPEG;
 759
 760         /*
 761          * select suitable norm
 762          */
 763         scale = tw9910_select_norm(priv->norm, mf->width, mf->height);
 764         if (!scale)
 765                 return -EINVAL;
 766
 767         mf->width       = scale->width;
 768         mf->height      = scale->height;
 769
 770         return 0;
 771 }
 772
 773 static int tw9910_video_probe(struct i2c_client *client)
 774 {
 775         struct tw9910_priv *priv = to_tw9910(client);
 776         s32 id;
 777
 778         /*
 779          * tw9910 only use 8 or 16 bit bus width
 780          */
 781         if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
 782             SOCAM_DATAWIDTH_8  != priv->info->buswidth) {
 783                 dev_err(&client->dev, "bus width error\n");
 784                 return -ENODEV;
 785         }
 786
 787         /*
 788          * check and show Product ID
 789          * So far only revisions 0 and 1 have been seen
 790          */
 791         id = i2c_smbus_read_byte_data(client, ID);
 792         priv->revision = GET_REV(id);
 793         id = GET_ID(id);
 794
 795         if (0x0B != id ||
 796             0x01 < priv->revision) {
 797                 dev_err(&client->dev,
 798                         "Product ID error %x:%x\n",
 799                         id, priv->revision);
 800                 return -ENODEV;
 801         }
 802
 803         dev_info(&client->dev,
 804                  "tw9910 Product ID %0x:%0x\n", id, priv->revision);
 805
 806         priv->norm = V4L2_STD_NTSC;
 807
 808         return 0;
 809 }
 810
 811 static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
 812         .g_chip_ident   = tw9910_g_chip_ident,
 813         .s_std          = tw9910_s_std,
 814         .g_std          = tw9910_g_std,
 815 #ifdef CONFIG_VIDEO_ADV_DEBUG
 816         .g_register     = tw9910_g_register,
 817         .s_register     = tw9910_s_register,
 818 #endif
 819 };
 820
 821 static int tw9910_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 822                            enum v4l2_mbus_pixelcode *code)
 823 {
 824         if (index)
 825                 return -EINVAL;
 826
 827         *code = V4L2_MBUS_FMT_UYVY8_2X8;
 828         return 0;
 829 }
 830
 831 static int tw9910_g_mbus_config(struct v4l2_subdev *sd,
 832                                 struct v4l2_mbus_config *cfg)
 833 {
 834         struct i2c_client *client = v4l2_get_subdevdata(sd);
 835         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 836
 837         cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
 838                 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
 839                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
 840                 V4L2_MBUS_DATA_ACTIVE_HIGH;
 841         cfg->type = V4L2_MBUS_PARALLEL;
 842         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
 843
 844         return 0;
 845 }
 846
 847 static int tw9910_s_mbus_config(struct v4l2_subdev *sd,
 848                                 const struct v4l2_mbus_config *cfg)
 849 {
 850         struct i2c_client *client = v4l2_get_subdevdata(sd);
 851         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 852         u8 val = VSSL_VVALID | HSSL_DVALID;
 853         unsigned long flags = soc_camera_apply_board_flags(icl, cfg);
 854
 855         /*
 856          * set OUTCTR1
 857          *
 858          * We use VVALID and DVALID signals to control VSYNC and HSYNC
 859          * outputs, in this mode their polarity is inverted.
 860          */
 861         if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
 862                 val |= HSP_HI;
 863
 864         if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
 865                 val |= VSP_HI;
 866
 867         return i2c_smbus_write_byte_data(client, OUTCTR1, val);
 868 }
 869
 870 static struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
 871         .s_stream       = tw9910_s_stream,
 872         .g_mbus_fmt     = tw9910_g_fmt,
 873         .s_mbus_fmt     = tw9910_s_fmt,
 874         .try_mbus_fmt   = tw9910_try_fmt,
 875         .cropcap        = tw9910_cropcap,
 876         .g_crop         = tw9910_g_crop,
 877         .enum_mbus_fmt  = tw9910_enum_fmt,
 878         .g_mbus_config  = tw9910_g_mbus_config,
 879         .s_mbus_config  = tw9910_s_mbus_config,
 880 };
 881
 882 static struct v4l2_subdev_ops tw9910_subdev_ops = {
 883         .core   = &tw9910_subdev_core_ops,
 884         .video  = &tw9910_subdev_video_ops,
 885 };
 886
 887 /*
 888  * i2c_driver function
 889  */
 890
 891 static int tw9910_probe(struct i2c_client *client,
 892                         const struct i2c_device_id *did)
 893
 894 {
 895         struct tw9910_priv              *priv;
 896         struct tw9910_video_info        *info;
 897         struct i2c_adapter              *adapter =
 898                 to_i2c_adapter(client->dev.parent);
 899         struct soc_camera_link          *icl = soc_camera_i2c_to_link(client);
 900         int                             ret;
 901
 902         if (!icl || !icl->priv) {
 903                 dev_err(&client->dev, "TW9910: missing platform data!\n");
 904                 return -EINVAL;
 905         }
 906
 907         info = icl->priv;
 908
 909         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 910                 dev_err(&client->dev,
 911                         "I2C-Adapter doesn't support "
 912                         "I2C_FUNC_SMBUS_BYTE_DATA\n");
 913                 return -EIO;
 914         }
 915
 916         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 917         if (!priv)
 918                 return -ENOMEM;
 919
 920         priv->info   = info;
 921
 922         v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
 923
 924         ret = tw9910_video_probe(client);
 925         if (ret)
 926                 kfree(priv);
 927
 928         return ret;
 929 }
 930
 931 static int tw9910_remove(struct i2c_client *client)
 932 {
 933         struct tw9910_priv *priv = to_tw9910(client);
 934
 935         kfree(priv);
 936         return 0;
 937 }
 938
 939 static const struct i2c_device_id tw9910_id[] = {
 940         { "tw9910", 0 },
 941         { }
 942 };
 943 MODULE_DEVICE_TABLE(i2c, tw9910_id);
 944
 945 static struct i2c_driver tw9910_i2c_driver = {
 946         .driver = {
 947                 .name = "tw9910",
 948         },
 949         .probe    = tw9910_probe,
 950         .remove   = tw9910_remove,
 951         .id_table = tw9910_id,
 952 };
 953
 954 /*
 955  * module function
 956  */
 957 static int __init tw9910_module_init(void)
 958 {
 959         return i2c_add_driver(&tw9910_i2c_driver);
 960 }
 961
 962 static void __exit tw9910_module_exit(void)
 963 {
 964         i2c_del_driver(&tw9910_i2c_driver);
 965 }
 966
 967 module_init(tw9910_module_init);
 968 module_exit(tw9910_module_exit);
 969
 970 MODULE_DESCRIPTION("SoC Camera driver for tw9910");
 971 MODULE_AUTHOR("Kuninori Morimoto");
 972 MODULE_LICENSE("GPL v2");