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/videodev2.h>
  26 #include <media/v4l2-chip-ident.h>
  27 #include <media/v4l2-subdev.h>
  28 #include <media/soc_camera.h>
  29 #include <media/tw9910.h>
  30
  31 #define GET_ID(val)  ((val & 0xF8) >> 3)
  32 #define GET_ReV(val) (val & 0x07)
  33
  34 /*
  35  * register offset
  36  */
  37 #define ID              0x00 /* Product ID Code Register */
  38 #define STATUS1         0x01 /* Chip Status Register I */
  39 #define INFORM          0x02 /* Input Format */
  40 #define OPFORM          0x03 /* Output Format Control Register */
  41 #define DLYCTR          0x04 /* Hysteresis and HSYNC Delay Control */
  42 #define OUTCTR1         0x05 /* Output Control I */
  43 #define ACNTL1          0x06 /* Analog Control Register 1 */
  44 #define CROP_HI         0x07 /* Cropping Register, High */
  45 #define VDELAY_LO       0x08 /* Vertical Delay Register, Low */
  46 #define VACTIVE_LO      0x09 /* Vertical Active Register, Low */
  47 #define HDELAY_LO       0x0A /* Horizontal Delay Register, Low */
  48 #define HACTIVE_LO      0x0B /* Horizontal Active Register, Low */
  49 #define CNTRL1          0x0C /* Control Register I */
  50 #define VSCALE_LO       0x0D /* Vertical Scaling Register, Low */
  51 #define SCALE_HI        0x0E /* Scaling Register, High */
  52 #define HSCALE_LO       0x0F /* Horizontal Scaling Register, Low */
  53 #define BRIGHT          0x10 /* BRIGHTNESS Control Register */
  54 #define CONTRAST        0x11 /* CONTRAST Control Register */
  55 #define SHARPNESS       0x12 /* SHARPNESS Control Register I */
  56 #define SAT_U           0x13 /* Chroma (U) Gain Register */
  57 #define SAT_V           0x14 /* Chroma (V) Gain Register */
  58 #define HUE             0x15 /* Hue Control Register */
  59 #define CORING1         0x17
  60 #define CORING2         0x18 /* Coring and IF compensation */
  61 #define VBICNTL         0x19 /* VBI Control Register */
  62 #define ACNTL2          0x1A /* Analog Control 2 */
  63 #define OUTCTR2         0x1B /* Output Control 2 */
  64 #define SDT             0x1C /* Standard Selection */
  65 #define SDTR            0x1D /* Standard Recognition */
  66 #define TEST            0x1F /* Test Control Register */
  67 #define CLMPG           0x20 /* Clamping Gain */
  68 #define IAGC            0x21 /* Individual AGC Gain */
  69 #define AGCGAIN         0x22 /* AGC Gain */
  70 #define PEAKWT          0x23 /* White Peak Threshold */
  71 #define CLMPL           0x24 /* Clamp level */
  72 #define SYNCT           0x25 /* Sync Amplitude */
  73 #define MISSCNT         0x26 /* Sync Miss Count Register */
  74 #define PCLAMP          0x27 /* Clamp Position Register */
  75 #define VCNTL1          0x28 /* Vertical Control I */
  76 #define VCNTL2          0x29 /* Vertical Control II */
  77 #define CKILL           0x2A /* Color Killer Level Control */
  78 #define COMB            0x2B /* Comb Filter Control */
  79 #define LDLY            0x2C /* Luma Delay and H Filter Control */
  80 #define MISC1           0x2D /* Miscellaneous Control I */
  81 #define LOOP            0x2E /* LOOP Control Register */
  82 #define MISC2           0x2F /* Miscellaneous Control II */
  83 #define MVSN            0x30 /* Macrovision Detection */
  84 #define STATUS2         0x31 /* Chip STATUS II */
  85 #define HFREF           0x32 /* H monitor */
  86 #define CLMD            0x33 /* CLAMP MODE */
  87 #define IDCNTL          0x34 /* ID Detection Control */
  88 #define CLCNTL1         0x35 /* Clamp Control I */
  89 #define ANAPLLCTL       0x4C
  90 #define VBIMIN          0x4D
  91 #define HSLOWCTL        0x4E
  92 #define WSS3            0x4F
  93 #define FILLDATA        0x50
  94 #define SDID            0x51
  95 #define DID             0x52
  96 #define WSS1            0x53
  97 #define WSS2            0x54
  98 #define VVBI            0x55
  99 #define LCTL6           0x56
 100 #define LCTL7           0x57
 101 #define LCTL8           0x58
 102 #define LCTL9           0x59
 103 #define LCTL10          0x5A
 104 #define LCTL11          0x5B
 105 #define LCTL12          0x5C
 106 #define LCTL13          0x5D
 107 #define LCTL14          0x5E
 108 #define LCTL15          0x5F
 109 #define LCTL16          0x60
 110 #define LCTL17          0x61
 111 #define LCTL18          0x62
 112 #define LCTL19          0x63
 113 #define LCTL20          0x64
 114 #define LCTL21          0x65
 115 #define LCTL22          0x66
 116 #define LCTL23          0x67
 117 #define LCTL24          0x68
 118 #define LCTL25          0x69
 119 #define LCTL26          0x6A
 120 #define HSGEGIN         0x6B
 121 #define HSEND           0x6C
 122 #define OVSDLY          0x6D
 123 #define OVSEND          0x6E
 124 #define VBIDELAY        0x6F
 125
 126 /*
 127  * register detail
 128  */
 129
 130 /* INFORM */
 131 #define FC27_ON     0x40 /* 1 : Input crystal clock frequency is 27MHz */
 132 #define FC27_FF     0x00 /* 0 : Square pixel mode. */
 133                          /*     Must use 24.54MHz for 60Hz field rate */
 134                          /*     source or 29.5MHz for 50Hz field rate */
 135 #define IFSEL_S     0x10 /* 01 : S-video decoding */
 136 #define IFSEL_C     0x00 /* 00 : Composite video decoding */
 137                          /* Y input video selection */
 138 #define YSEL_M0     0x00 /*  00 : Mux0 selected */
 139 #define YSEL_M1     0x04 /*  01 : Mux1 selected */
 140 #define YSEL_M2     0x08 /*  10 : Mux2 selected */
 141 #define YSEL_M3     0x10 /*  11 : Mux3 selected */
 142
 143 /* OPFORM */
 144 #define MODE        0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
 145                          /* 1 : ITU-R-656 compatible data sequence format */
 146 #define LEN         0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
 147                          /* 1 : 16-bit YCrCb 4:2:2 output format.*/
 148 #define LLCMODE     0x20 /* 1 : LLC output mode. */
 149                          /* 0 : free-run output mode */
 150 #define AINC        0x10 /* Serial interface auto-indexing control */
 151                          /* 0 : auto-increment */
 152                          /* 1 : non-auto */
 153 #define VSCTL       0x08 /* 1 : Vertical out ctrl by DVALID */
 154                          /* 0 : Vertical out ctrl by HACTIVE and DVALID */
 155 #define OEN         0x04 /* Output Enable together with TRI_SEL. */
 156
 157 /* OUTCTR1 */
 158 #define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */
 159 #define VSP_HI      0x80 /* 1 : VS pin output polarity is active high. */
 160                          /* VS pin output control */
 161 #define VSSL_VSYNC  0x00 /*   0 : VSYNC  */
 162 #define VSSL_VACT   0x10 /*   1 : VACT   */
 163 #define VSSL_FIELD  0x20 /*   2 : FIELD  */
 164 #define VSSL_VVALID 0x30 /*   3 : VVALID */
 165 #define VSSL_ZERO   0x70 /*   7 : 0      */
 166 #define HSP_LOW     0x00 /* 0 : HS pin output polarity is active low */
 167 #define HSP_HI      0x08 /* 1 : HS pin output polarity is active high.*/
 168                          /* HS pin output control */
 169 #define HSSL_HACT   0x00 /*   0 : HACT   */
 170 #define HSSL_HSYNC  0x01 /*   1 : HSYNC  */
 171 #define HSSL_DVALID 0x02 /*   2 : DVALID */
 172 #define HSSL_HLOCK  0x03 /*   3 : HLOCK  */
 173 #define HSSL_ASYNCW 0x04 /*   4 : ASYNCW */
 174 #define HSSL_ZERO   0x07 /*   7 : 0      */
 175
 176 /* ACNTL1 */
 177 #define SRESET      0x80 /* resets the device to its default state
 178                           * but all register content remain unchanged.
 179                           * This bit is self-resetting.
 180                           */
 181
 182 /* VBICNTL */
 183 /* RTSEL : control the real time signal
 184 *          output from the MPOUT pin
 185 */
 186 #define RTSEL_MASK  0x07
 187 #define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
 188 #define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
 189 #define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
 190 #define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
 191 #define RTSEL_MONO  0x04 /* 0100 = MONO */
 192 #define RTSEL_DET50 0x05 /* 0101 = DET50 */
 193 #define RTSEL_FIELD 0x06 /* 0110 = FIELD */
 194 #define RTSEL_RTCO  0x07 /* 0111 = RTCO ( Real Time Control ) */
 195
 196 /*
 197  * structure
 198  */
 199
 200 struct regval_list {
 201         unsigned char reg_num;
 202         unsigned char value;
 203 };
 204
 205 struct tw9910_scale_ctrl {
 206         char           *name;
 207         unsigned short  width;
 208         unsigned short  height;
 209         u16             hscale;
 210         u16             vscale;
 211 };
 212
 213 struct tw9910_cropping_ctrl {
 214         u16 vdelay;
 215         u16 vactive;
 216         u16 hdelay;
 217         u16 hactive;
 218 };
 219
 220 struct tw9910_hsync_ctrl {
 221         u16 start;
 222         u16 end;
 223 };
 224
 225 struct tw9910_priv {
 226         struct v4l2_subdev                subdev;
 227         struct tw9910_video_info       *info;
 228         const struct tw9910_scale_ctrl *scale;
 229 };
 230
 231 /*
 232  * register settings
 233  */
 234
 235 #define ENDMARKER { 0xff, 0xff }
 236
 237 static const struct regval_list tw9910_default_regs[] =
 238 {
 239         { OPFORM,  0x00 },
 240         { OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },
 241         ENDMARKER,
 242 };
 243
 244 static const struct soc_camera_data_format tw9910_color_fmt[] = {
 245         {
 246                 .name       = "VYUY",
 247                 .fourcc     = V4L2_PIX_FMT_VYUY,
 248                 .depth      = 16,
 249                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
 250         }
 251 };
 252
 253 static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
 254         {
 255                 .name   = "NTSC SQ",
 256                 .width  = 640,
 257                 .height = 480,
 258                 .hscale = 0x0100,
 259                 .vscale = 0x0100,
 260         },
 261         {
 262                 .name   = "NTSC CCIR601",
 263                 .width  = 720,
 264                 .height = 480,
 265                 .hscale = 0x0100,
 266                 .vscale = 0x0100,
 267         },
 268         {
 269                 .name   = "NTSC SQ (CIF)",
 270                 .width  = 320,
 271                 .height = 240,
 272                 .hscale = 0x0200,
 273                 .vscale = 0x0200,
 274         },
 275         {
 276                 .name   = "NTSC CCIR601 (CIF)",
 277                 .width  = 360,
 278                 .height = 240,
 279                 .hscale = 0x0200,
 280                 .vscale = 0x0200,
 281         },
 282         {
 283                 .name   = "NTSC SQ (QCIF)",
 284                 .width  = 160,
 285                 .height = 120,
 286                 .hscale = 0x0400,
 287                 .vscale = 0x0400,
 288         },
 289         {
 290                 .name   = "NTSC CCIR601 (QCIF)",
 291                 .width  = 180,
 292                 .height = 120,
 293                 .hscale = 0x0400,
 294                 .vscale = 0x0400,
 295         },
 296 };
 297
 298 static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
 299         {
 300                 .name   = "PAL SQ",
 301                 .width  = 768,
 302                 .height = 576,
 303                 .hscale = 0x0100,
 304                 .vscale = 0x0100,
 305         },
 306         {
 307                 .name   = "PAL CCIR601",
 308                 .width  = 720,
 309                 .height = 576,
 310                 .hscale = 0x0100,
 311                 .vscale = 0x0100,
 312         },
 313         {
 314                 .name   = "PAL SQ (CIF)",
 315                 .width  = 384,
 316                 .height = 288,
 317                 .hscale = 0x0200,
 318                 .vscale = 0x0200,
 319         },
 320         {
 321                 .name   = "PAL CCIR601 (CIF)",
 322                 .width  = 360,
 323                 .height = 288,
 324                 .hscale = 0x0200,
 325                 .vscale = 0x0200,
 326         },
 327         {
 328                 .name   = "PAL SQ (QCIF)",
 329                 .width  = 192,
 330                 .height = 144,
 331                 .hscale = 0x0400,
 332                 .vscale = 0x0400,
 333         },
 334         {
 335                 .name   = "PAL CCIR601 (QCIF)",
 336                 .width  = 180,
 337                 .height = 144,
 338                 .hscale = 0x0400,
 339                 .vscale = 0x0400,
 340         },
 341 };
 342
 343 static const struct tw9910_cropping_ctrl tw9910_cropping_ctrl = {
 344         .vdelay  = 0x0012,
 345         .vactive = 0x00F0,
 346         .hdelay  = 0x0010,
 347         .hactive = 0x02D0,
 348 };
 349
 350 static const struct tw9910_hsync_ctrl tw9910_hsync_ctrl = {
 351         .start = 0x0260,
 352         .end   = 0x0300,
 353 };
 354
 355 /*
 356  * general function
 357  */
 358 static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
 359 {
 360         return container_of(i2c_get_clientdata(client), struct tw9910_priv, subdev);
 361 }
 362
 363 static int tw9910_set_scale(struct i2c_client *client,
 364                             const struct tw9910_scale_ctrl *scale)
 365 {
 366         int ret;
 367
 368         ret = i2c_smbus_write_byte_data(client, SCALE_HI,
 369                                         (scale->vscale & 0x0F00) >> 4 |
 370                                         (scale->hscale & 0x0F00) >> 8);
 371         if (ret < 0)
 372                 return ret;
 373
 374         ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
 375                                         scale->hscale & 0x00FF);
 376         if (ret < 0)
 377                 return ret;
 378
 379         ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
 380                                         scale->vscale & 0x00FF);
 381
 382         return ret;
 383 }
 384
 385 static int tw9910_set_cropping(struct i2c_client *client,
 386                                const struct tw9910_cropping_ctrl *cropping)
 387 {
 388         int ret;
 389
 390         ret = i2c_smbus_write_byte_data(client, CROP_HI,
 391                                         (cropping->vdelay  & 0x0300) >> 2 |
 392                                         (cropping->vactive & 0x0300) >> 4 |
 393                                         (cropping->hdelay  & 0x0300) >> 6 |
 394                                         (cropping->hactive & 0x0300) >> 8);
 395         if (ret < 0)
 396                 return ret;
 397
 398         ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
 399                                         cropping->vdelay & 0x00FF);
 400         if (ret < 0)
 401                 return ret;
 402
 403         ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
 404                                         cropping->vactive & 0x00FF);
 405         if (ret < 0)
 406                 return ret;
 407
 408         ret = i2c_smbus_write_byte_data(client, HDELAY_LO,
 409                                         cropping->hdelay & 0x00FF);
 410         if (ret < 0)
 411                 return ret;
 412
 413         ret = i2c_smbus_write_byte_data(client, HACTIVE_LO,
 414                                         cropping->hactive & 0x00FF);
 415
 416         return ret;
 417 }
 418
 419 static int tw9910_set_hsync(struct i2c_client *client,
 420                             const struct tw9910_hsync_ctrl *hsync)
 421 {
 422         int ret;
 423
 424         /* bit 10 - 3 */
 425         ret = i2c_smbus_write_byte_data(client, HSGEGIN,
 426                                         (hsync->start & 0x07F8) >> 3);
 427         if (ret < 0)
 428                 return ret;
 429
 430         /* bit 10 - 3 */
 431         ret = i2c_smbus_write_byte_data(client, HSEND,
 432                                         (hsync->end & 0x07F8) >> 3);
 433         if (ret < 0)
 434                 return ret;
 435
 436         /* bit 2 - 0 */
 437         ret = i2c_smbus_read_byte_data(client, HSLOWCTL);
 438         if (ret < 0)
 439                 return ret;
 440
 441         ret = i2c_smbus_write_byte_data(client, HSLOWCTL,
 442                                         (ret & 0x88)                 |
 443                                         (hsync->start & 0x0007) << 4 |
 444                                         (hsync->end   & 0x0007));
 445
 446         return ret;
 447 }
 448
 449 static int tw9910_write_array(struct i2c_client *client,
 450                               const struct regval_list *vals)
 451 {
 452         while (vals->reg_num != 0xff) {
 453                 int ret = i2c_smbus_write_byte_data(client,
 454                                                     vals->reg_num,
 455                                                     vals->value);
 456                 if (ret < 0)
 457                         return ret;
 458                 vals++;
 459         }
 460         return 0;
 461 }
 462
 463 static int tw9910_mask_set(struct i2c_client *client, u8 command,
 464                            u8 mask, u8 set)
 465 {
 466         s32 val = i2c_smbus_read_byte_data(client, command);
 467         if (val < 0)
 468                 return val;
 469
 470         val &= ~mask;
 471         val |= set & mask;
 472
 473         return i2c_smbus_write_byte_data(client, command, val);
 474 }
 475
 476 static void tw9910_reset(struct i2c_client *client)
 477 {
 478         i2c_smbus_write_byte_data(client, ACNTL1, SRESET);
 479         msleep(1);
 480 }
 481
 482 static const struct tw9910_scale_ctrl*
 483 tw9910_select_norm(struct soc_camera_device *icd, u32 width, u32 height)
 484 {
 485         const struct tw9910_scale_ctrl *scale;
 486         const struct tw9910_scale_ctrl *ret = NULL;
 487         v4l2_std_id norm = icd->vdev->current_norm;
 488         __u32 diff = 0xffffffff, tmp;
 489         int size, i;
 490
 491         if (norm & V4L2_STD_NTSC) {
 492                 scale = tw9910_ntsc_scales;
 493                 size = ARRAY_SIZE(tw9910_ntsc_scales);
 494         } else if (norm & V4L2_STD_PAL) {
 495                 scale = tw9910_pal_scales;
 496                 size = ARRAY_SIZE(tw9910_pal_scales);
 497         } else {
 498                 return NULL;
 499         }
 500
 501         for (i = 0; i < size; i++) {
 502                 tmp = abs(width - scale[i].width) +
 503                         abs(height - scale[i].height);
 504                 if (tmp < diff) {
 505                         diff = tmp;
 506                         ret = scale + i;
 507                 }
 508         }
 509
 510         return ret;
 511 }
 512
 513 /*
 514  * soc_camera_ops function
 515  */
 516 static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
 517 {
 518         struct i2c_client *client = sd->priv;
 519         struct tw9910_priv *priv = to_tw9910(client);
 520
 521         if (!enable)
 522                 return 0;
 523
 524         if (!priv->scale) {
 525                 dev_err(&client->dev, "norm select error\n");
 526                 return -EPERM;
 527         }
 528
 529         dev_dbg(&client->dev, "%s %dx%d\n",
 530                  priv->scale->name,
 531                  priv->scale->width,
 532                  priv->scale->height);
 533
 534         return 0;
 535 }
 536
 537 static int tw9910_set_bus_param(struct soc_camera_device *icd,
 538                                 unsigned long flags)
 539 {
 540         return 0;
 541 }
 542
 543 static unsigned long tw9910_query_bus_param(struct soc_camera_device *icd)
 544 {
 545         struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
 546         struct tw9910_priv *priv = to_tw9910(client);
 547         struct soc_camera_link *icl = to_soc_camera_link(icd);
 548         unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
 549                 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
 550                 SOCAM_DATA_ACTIVE_HIGH | priv->info->buswidth;
 551
 552         return soc_camera_apply_sensor_flags(icl, flags);
 553 }
 554
 555 static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 556 {
 557         int ret = -EINVAL;
 558
 559         if (norm & (V4L2_STD_NTSC | V4L2_STD_PAL))
 560                 ret = 0;
 561
 562         return ret;
 563 }
 564
 565 static int tw9910_enum_input(struct soc_camera_device *icd,
 566                              struct v4l2_input *inp)
 567 {
 568         inp->type = V4L2_INPUT_TYPE_TUNER;
 569         inp->std  = V4L2_STD_UNKNOWN;
 570         strcpy(inp->name, "Video");
 571
 572         return 0;
 573 }
 574
 575 static int tw9910_g_chip_ident(struct v4l2_subdev *sd,
 576                                struct v4l2_dbg_chip_ident *id)
 577 {
 578         id->ident = V4L2_IDENT_TW9910;
 579         id->revision = 0;
 580
 581         return 0;
 582 }
 583
 584 #ifdef CONFIG_VIDEO_ADV_DEBUG
 585 static int tw9910_g_register(struct v4l2_subdev *sd,
 586                              struct v4l2_dbg_register *reg)
 587 {
 588         struct i2c_client *client = sd->priv;
 589         int ret;
 590
 591         if (reg->reg > 0xff)
 592                 return -EINVAL;
 593
 594         ret = i2c_smbus_read_byte_data(client, reg->reg);
 595         if (ret < 0)
 596                 return ret;
 597
 598         /* ret      = int
 599          * reg->val = __u64
 600          */
 601         reg->val = (__u64)ret;
 602
 603         return 0;
 604 }
 605
 606 static int tw9910_s_register(struct v4l2_subdev *sd,
 607                              struct v4l2_dbg_register *reg)
 608 {
 609         struct i2c_client *client = sd->priv;
 610
 611         if (reg->reg > 0xff ||
 612             reg->val > 0xff)
 613                 return -EINVAL;
 614
 615         return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
 616 }
 617 #endif
 618
 619 static int tw9910_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 620 {
 621         struct v4l2_rect *rect = &a->c;
 622         struct i2c_client *client = sd->priv;
 623         struct tw9910_priv *priv = to_tw9910(client);
 624         struct soc_camera_device *icd = client->dev.platform_data;
 625         int                 ret  = -EINVAL;
 626         u8                  val;
 627
 628         /*
 629          * select suitable norm
 630          */
 631         priv->scale = tw9910_select_norm(icd, rect->width, rect->height);
 632         if (!priv->scale)
 633                 goto tw9910_set_fmt_error;
 634
 635         /*
 636          * reset hardware
 637          */
 638         tw9910_reset(client);
 639         ret = tw9910_write_array(client, tw9910_default_regs);
 640         if (ret < 0)
 641                 goto tw9910_set_fmt_error;
 642
 643         /*
 644          * set bus width
 645          */
 646         val = 0x00;
 647         if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
 648                 val = LEN;
 649
 650         ret = tw9910_mask_set(client, OPFORM, LEN, val);
 651         if (ret < 0)
 652                 goto tw9910_set_fmt_error;
 653
 654         /*
 655          * select MPOUT behavior
 656          */
 657         switch (priv->info->mpout) {
 658         case TW9910_MPO_VLOSS:
 659                 val = RTSEL_VLOSS; break;
 660         case TW9910_MPO_HLOCK:
 661                 val = RTSEL_HLOCK; break;
 662         case TW9910_MPO_SLOCK:
 663                 val = RTSEL_SLOCK; break;
 664         case TW9910_MPO_VLOCK:
 665                 val = RTSEL_VLOCK; break;
 666         case TW9910_MPO_MONO:
 667                 val = RTSEL_MONO;  break;
 668         case TW9910_MPO_DET50:
 669                 val = RTSEL_DET50; break;
 670         case TW9910_MPO_FIELD:
 671                 val = RTSEL_FIELD; break;
 672         case TW9910_MPO_RTCO:
 673                 val = RTSEL_RTCO;  break;
 674         default:
 675                 val = 0;
 676         }
 677
 678         ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
 679         if (ret < 0)
 680                 goto tw9910_set_fmt_error;
 681
 682         /*
 683          * set scale
 684          */
 685         ret = tw9910_set_scale(client, priv->scale);
 686         if (ret < 0)
 687                 goto tw9910_set_fmt_error;
 688
 689         /*
 690          * set cropping
 691          */
 692         ret = tw9910_set_cropping(client, &tw9910_cropping_ctrl);
 693         if (ret < 0)
 694                 goto tw9910_set_fmt_error;
 695
 696         /*
 697          * set hsync
 698          */
 699         ret = tw9910_set_hsync(client, &tw9910_hsync_ctrl);
 700         if (ret < 0)
 701                 goto tw9910_set_fmt_error;
 702
 703         rect->width = priv->scale->width;
 704         rect->height = priv->scale->height;
 705         rect->left = 0;
 706         rect->top = 0;
 707
 708         return ret;
 709
 710 tw9910_set_fmt_error:
 711
 712         tw9910_reset(client);
 713         priv->scale = NULL;
 714
 715         return ret;
 716 }
 717
 718 static int tw9910_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
 719 {
 720         struct v4l2_pix_format *pix = &f->fmt.pix;
 721         /* See tw9910_s_crop() - no proper cropping support */
 722         struct v4l2_crop a = {
 723                 .c = {
 724                         .left   = 0,
 725                         .top    = 0,
 726                         .width  = pix->width,
 727                         .height = pix->height,
 728                 },
 729         };
 730         int i, ret;
 731
 732         /*
 733          * check color format
 734          */
 735         for (i = 0; i < ARRAY_SIZE(tw9910_color_fmt); i++)
 736                 if (pix->pixelformat == tw9910_color_fmt[i].fourcc)
 737                         break;
 738
 739         if (i == ARRAY_SIZE(tw9910_color_fmt))
 740                 return -EINVAL;
 741
 742         ret = tw9910_s_crop(sd, &a);
 743         if (!ret) {
 744                 pix->width = a.c.width;
 745                 pix->height = a.c.height;
 746         }
 747         return ret;
 748 }
 749
 750 static int tw9910_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
 751 {
 752         struct i2c_client *client = sd->priv;
 753         struct soc_camera_device *icd = client->dev.platform_data;
 754         struct v4l2_pix_format *pix = &f->fmt.pix;
 755         const struct tw9910_scale_ctrl *scale;
 756
 757         if (V4L2_FIELD_ANY == pix->field) {
 758                 pix->field = V4L2_FIELD_INTERLACED;
 759         } else if (V4L2_FIELD_INTERLACED != pix->field) {
 760                 dev_err(&client->dev, "Field type invalid.\n");
 761                 return -EINVAL;
 762         }
 763
 764         /*
 765          * select suitable norm
 766          */
 767         scale = tw9910_select_norm(icd, pix->width, pix->height);
 768         if (!scale)
 769                 return -EINVAL;
 770
 771         pix->width  = scale->width;
 772         pix->height = scale->height;
 773
 774         return 0;
 775 }
 776
 777 static int tw9910_video_probe(struct soc_camera_device *icd,
 778                               struct i2c_client *client)
 779 {
 780         struct tw9910_priv *priv = to_tw9910(client);
 781         s32 val;
 782
 783         /*
 784          * We must have a parent by now. And it cannot be a wrong one.
 785          * So this entire test is completely redundant.
 786          */
 787         if (!icd->dev.parent ||
 788             to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
 789                 return -ENODEV;
 790
 791         /*
 792          * tw9910 only use 8 or 16 bit bus width
 793          */
 794         if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
 795             SOCAM_DATAWIDTH_8  != priv->info->buswidth) {
 796                 dev_err(&client->dev, "bus width error\n");
 797                 return -ENODEV;
 798         }
 799
 800         icd->formats     = tw9910_color_fmt;
 801         icd->num_formats = ARRAY_SIZE(tw9910_color_fmt);
 802
 803         /*
 804          * check and show Product ID
 805          */
 806         val = i2c_smbus_read_byte_data(client, ID);
 807
 808         if (0x0B != GET_ID(val) ||
 809             0x00 != GET_ReV(val)) {
 810                 dev_err(&client->dev,
 811                         "Product ID error %x:%x\n", GET_ID(val), GET_ReV(val));
 812                 return -ENODEV;
 813         }
 814
 815         dev_info(&client->dev,
 816                  "tw9910 Product ID %0x:%0x\n", GET_ID(val), GET_ReV(val));
 817
 818         icd->vdev->tvnorms      = V4L2_STD_NTSC | V4L2_STD_PAL;
 819         icd->vdev->current_norm = V4L2_STD_NTSC;
 820
 821         return 0;
 822 }
 823
 824 static struct soc_camera_ops tw9910_ops = {
 825         .set_bus_param          = tw9910_set_bus_param,
 826         .query_bus_param        = tw9910_query_bus_param,
 827         .enum_input             = tw9910_enum_input,
 828 };
 829
 830 static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
 831         .g_chip_ident   = tw9910_g_chip_ident,
 832         .s_std          = tw9910_s_std,
 833 #ifdef CONFIG_VIDEO_ADV_DEBUG
 834         .g_register     = tw9910_g_register,
 835         .s_register     = tw9910_s_register,
 836 #endif
 837 };
 838
 839 static struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
 840         .s_stream       = tw9910_s_stream,
 841         .s_fmt          = tw9910_s_fmt,
 842         .try_fmt        = tw9910_try_fmt,
 843         .s_crop         = tw9910_s_crop,
 844 };
 845
 846 static struct v4l2_subdev_ops tw9910_subdev_ops = {
 847         .core   = &tw9910_subdev_core_ops,
 848         .video  = &tw9910_subdev_video_ops,
 849 };
 850
 851 /*
 852  * i2c_driver function
 853  */
 854
 855 /* This is called during probe, so, setting rect_max is Ok here: scale == 1 */
 856 static void limit_to_scale(struct soc_camera_device *icd,
 857                            const struct tw9910_scale_ctrl *scale)
 858 {
 859         if (scale->width > icd->rect_max.width)
 860                 icd->rect_max.width  = scale->width;
 861         if (scale->width < icd->width_min)
 862                 icd->width_min = scale->width;
 863         if (scale->height > icd->rect_max.height)
 864                 icd->rect_max.height = scale->height;
 865         if (scale->height < icd->height_min)
 866                 icd->height_min = scale->height;
 867 }
 868
 869 static int tw9910_probe(struct i2c_client *client,
 870                         const struct i2c_device_id *did)
 871
 872 {
 873         struct tw9910_priv             *priv;
 874         struct tw9910_video_info       *info;
 875         struct soc_camera_device       *icd = client->dev.platform_data;
 876         struct i2c_adapter             *adapter =
 877                 to_i2c_adapter(client->dev.parent);
 878         struct soc_camera_link         *icl;
 879         const struct tw9910_scale_ctrl *scale;
 880         int                             i, ret;
 881
 882         if (!icd) {
 883                 dev_err(&client->dev, "TW9910: missing soc-camera data!\n");
 884                 return -EINVAL;
 885         }
 886
 887         icl = to_soc_camera_link(icd);
 888         if (!icl)
 889                 return -EINVAL;
 890
 891         info = container_of(icl, struct tw9910_video_info, link);
 892
 893         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 894                 dev_err(&client->dev,
 895                         "I2C-Adapter doesn't support "
 896                         "I2C_FUNC_SMBUS_BYTE_DATA\n");
 897                 return -EIO;
 898         }
 899
 900         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 901         if (!priv)
 902                 return -ENOMEM;
 903
 904         priv->info   = info;
 905
 906         v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
 907
 908         icd->ops     = &tw9910_ops;
 909         icd->iface   = info->link.bus_id;
 910
 911         /*
 912          * set width and height
 913          */
 914         icd->rect_max.width  = tw9910_ntsc_scales[0].width; /* set default */
 915         icd->width_min  = tw9910_ntsc_scales[0].width;
 916         icd->rect_max.height = tw9910_ntsc_scales[0].height;
 917         icd->height_min = tw9910_ntsc_scales[0].height;
 918
 919         scale = tw9910_ntsc_scales;
 920         for (i = 0; i < ARRAY_SIZE(tw9910_ntsc_scales); i++)
 921                 limit_to_scale(icd, scale + i);
 922
 923         scale = tw9910_pal_scales;
 924         for (i = 0; i < ARRAY_SIZE(tw9910_pal_scales); i++)
 925                 limit_to_scale(icd, scale + i);
 926
 927         ret = tw9910_video_probe(icd, client);
 928         if (ret) {
 929                 icd->ops = NULL;
 930                 i2c_set_clientdata(client, NULL);
 931                 kfree(priv);
 932         }
 933
 934         return ret;
 935 }
 936
 937 static int tw9910_remove(struct i2c_client *client)
 938 {
 939         struct tw9910_priv *priv = to_tw9910(client);
 940         struct soc_camera_device *icd = client->dev.platform_data;
 941
 942         icd->ops = NULL;
 943         i2c_set_clientdata(client, NULL);
 944         kfree(priv);
 945         return 0;
 946 }
 947
 948 static const struct i2c_device_id tw9910_id[] = {
 949         { "tw9910", 0 },
 950         { }
 951 };
 952 MODULE_DEVICE_TABLE(i2c, tw9910_id);
 953
 954 static struct i2c_driver tw9910_i2c_driver = {
 955         .driver = {
 956                 .name = "tw9910",
 957         },
 958         .probe    = tw9910_probe,
 959         .remove   = tw9910_remove,
 960         .id_table = tw9910_id,
 961 };
 962
 963 /*
 964  * module function
 965  */
 966 static int __init tw9910_module_init(void)
 967 {
 968         return i2c_add_driver(&tw9910_i2c_driver);
 969 }
 970
 971 static void __exit tw9910_module_exit(void)
 972 {
 973         i2c_del_driver(&tw9910_i2c_driver);
 974 }
 975
 976 module_init(tw9910_module_init);
 977 module_exit(tw9910_module_exit);
 978
 979 MODULE_DESCRIPTION("SoC Camera driver for tw9910");
 980 MODULE_AUTHOR("Kuninori Morimoto");
 981 MODULE_LICENSE("GPL v2");