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 HSBEGIN         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_TRI_SEL_MASK        0x07
 156 #define OEN_TRI_SEL_ALL_ON      0x00 /* Enable output for Rev0/Rev1 */
 157 #define OEN_TRI_SEL_ALL_OFF_r0  0x06 /* All tri-stated for Rev0 */
 158 #define OEN_TRI_SEL_ALL_OFF_r1  0x07 /* All tri-stated for Rev1 */
 159
 160 /* OUTCTR1 */
 161 #define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */
 162 #define VSP_HI      0x80 /* 1 : VS pin output polarity is active high. */
 163                          /* VS pin output control */
 164 #define VSSL_VSYNC  0x00 /*   0 : VSYNC  */
 165 #define VSSL_VACT   0x10 /*   1 : VACT   */
 166 #define VSSL_FIELD  0x20 /*   2 : FIELD  */
 167 #define VSSL_VVALID 0x30 /*   3 : VVALID */
 168 #define VSSL_ZERO   0x70 /*   7 : 0      */
 169 #define HSP_LOW     0x00 /* 0 : HS pin output polarity is active low */
 170 #define HSP_HI      0x08 /* 1 : HS pin output polarity is active high.*/
 171                          /* HS pin output control */
 172 #define HSSL_HACT   0x00 /*   0 : HACT   */
 173 #define HSSL_HSYNC  0x01 /*   1 : HSYNC  */
 174 #define HSSL_DVALID 0x02 /*   2 : DVALID */
 175 #define HSSL_HLOCK  0x03 /*   3 : HLOCK  */
 176 #define HSSL_ASYNCW 0x04 /*   4 : ASYNCW */
 177 #define HSSL_ZERO   0x07 /*   7 : 0      */
 178
 179 /* ACNTL1 */
 180 #define SRESET      0x80 /* resets the device to its default state
 181                           * but all register content remain unchanged.
 182                           * This bit is self-resetting.
 183                           */
 184 #define ACNTL1_PDN_MASK 0x0e
 185 #define CLK_PDN         0x08 /* system clock power down */
 186 #define Y_PDN           0x04 /* Luma ADC power down */
 187 #define C_PDN           0x02 /* Chroma ADC power down */
 188
 189 /* ACNTL2 */
 190 #define ACNTL2_PDN_MASK 0x40
 191 #define PLL_PDN         0x40 /* PLL power down */
 192
 193 /* VBICNTL */
 194
 195 /* RTSEL : control the real time signal output from the MPOUT pin */
 196 #define RTSEL_MASK  0x07
 197 #define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
 198 #define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
 199 #define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
 200 #define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
 201 #define RTSEL_MONO  0x04 /* 0100 = MONO */
 202 #define RTSEL_DET50 0x05 /* 0101 = DET50 */
 203 #define RTSEL_FIELD 0x06 /* 0110 = FIELD */
 204 #define RTSEL_RTCO  0x07 /* 0111 = RTCO ( Real Time Control ) */
 205
 206 /*
 207  * structure
 208  */
 209
 210 struct regval_list {
 211         unsigned char reg_num;
 212         unsigned char value;
 213 };
 214
 215 struct tw9910_scale_ctrl {
 216         char           *name;
 217         unsigned short  width;
 218         unsigned short  height;
 219         u16             hscale;
 220         u16             vscale;
 221 };
 222
 223 struct tw9910_cropping_ctrl {
 224         u16 vdelay;
 225         u16 vactive;
 226         u16 hdelay;
 227         u16 hactive;
 228 };
 229
 230 struct tw9910_hsync_ctrl {
 231         u16 start;
 232         u16 end;
 233 };
 234
 235 struct tw9910_priv {
 236         struct v4l2_subdev              subdev;
 237         struct tw9910_video_info        *info;
 238         const struct tw9910_scale_ctrl  *scale;
 239         u32                             revision;
 240 };
 241
 242 static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
 243         {
 244                 .name   = "NTSC SQ",
 245                 .width  = 640,
 246                 .height = 480,
 247                 .hscale = 0x0100,
 248                 .vscale = 0x0100,
 249         },
 250         {
 251                 .name   = "NTSC CCIR601",
 252                 .width  = 720,
 253                 .height = 480,
 254                 .hscale = 0x0100,
 255                 .vscale = 0x0100,
 256         },
 257         {
 258                 .name   = "NTSC SQ (CIF)",
 259                 .width  = 320,
 260                 .height = 240,
 261                 .hscale = 0x0200,
 262                 .vscale = 0x0200,
 263         },
 264         {
 265                 .name   = "NTSC CCIR601 (CIF)",
 266                 .width  = 360,
 267                 .height = 240,
 268                 .hscale = 0x0200,
 269                 .vscale = 0x0200,
 270         },
 271         {
 272                 .name   = "NTSC SQ (QCIF)",
 273                 .width  = 160,
 274                 .height = 120,
 275                 .hscale = 0x0400,
 276                 .vscale = 0x0400,
 277         },
 278         {
 279                 .name   = "NTSC CCIR601 (QCIF)",
 280                 .width  = 180,
 281                 .height = 120,
 282                 .hscale = 0x0400,
 283                 .vscale = 0x0400,
 284         },
 285 };
 286
 287 static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
 288         {
 289                 .name   = "PAL SQ",
 290                 .width  = 768,
 291                 .height = 576,
 292                 .hscale = 0x0100,
 293                 .vscale = 0x0100,
 294         },
 295         {
 296                 .name   = "PAL CCIR601",
 297                 .width  = 720,
 298                 .height = 576,
 299                 .hscale = 0x0100,
 300                 .vscale = 0x0100,
 301         },
 302         {
 303                 .name   = "PAL SQ (CIF)",
 304                 .width  = 384,
 305                 .height = 288,
 306                 .hscale = 0x0200,
 307                 .vscale = 0x0200,
 308         },
 309         {
 310                 .name   = "PAL CCIR601 (CIF)",
 311                 .width  = 360,
 312                 .height = 288,
 313                 .hscale = 0x0200,
 314                 .vscale = 0x0200,
 315         },
 316         {
 317                 .name   = "PAL SQ (QCIF)",
 318                 .width  = 192,
 319                 .height = 144,
 320                 .hscale = 0x0400,
 321                 .vscale = 0x0400,
 322         },
 323         {
 324                 .name   = "PAL CCIR601 (QCIF)",
 325                 .width  = 180,
 326                 .height = 144,
 327                 .hscale = 0x0400,
 328                 .vscale = 0x0400,
 329         },
 330 };
 331
 332 static const struct tw9910_hsync_ctrl tw9910_hsync_ctrl = {
 333         .start = 0x0260,
 334         .end   = 0x0300,
 335 };
 336
 337 /*
 338  * general function
 339  */
 340 static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
 341 {
 342         return container_of(i2c_get_clientdata(client), struct tw9910_priv,
 343                             subdev);
 344 }
 345
 346 static int tw9910_mask_set(struct i2c_client *client, u8 command,
 347                            u8 mask, u8 set)
 348 {
 349         s32 val = i2c_smbus_read_byte_data(client, command);
 350         if (val < 0)
 351                 return val;
 352
 353         val &= ~mask;
 354         val |= set & mask;
 355
 356         return i2c_smbus_write_byte_data(client, command, val);
 357 }
 358
 359 static int tw9910_set_scale(struct i2c_client *client,
 360                             const struct tw9910_scale_ctrl *scale)
 361 {
 362         int ret;
 363
 364         ret = i2c_smbus_write_byte_data(client, SCALE_HI,
 365                                         (scale->vscale & 0x0F00) >> 4 |
 366                                         (scale->hscale & 0x0F00) >> 8);
 367         if (ret < 0)
 368                 return ret;
 369
 370         ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
 371                                         scale->hscale & 0x00FF);
 372         if (ret < 0)
 373                 return ret;
 374
 375         ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
 376                                         scale->vscale & 0x00FF);
 377
 378         return ret;
 379 }
 380
 381 static int tw9910_set_hsync(struct i2c_client *client,
 382                             const struct tw9910_hsync_ctrl *hsync)
 383 {
 384         struct tw9910_priv *priv = to_tw9910(client);
 385         int ret;
 386
 387         /* bit 10 - 3 */
 388         ret = i2c_smbus_write_byte_data(client, HSBEGIN,
 389                                         (hsync->start & 0x07F8) >> 3);
 390         if (ret < 0)
 391                 return ret;
 392
 393         /* bit 10 - 3 */
 394         ret = i2c_smbus_write_byte_data(client, HSEND,
 395                                         (hsync->end & 0x07F8) >> 3);
 396         if (ret < 0)
 397                 return ret;
 398
 399         /* So far only revisions 0 and 1 have been seen */
 400         /* bit 2 - 0 */
 401         if (1 == priv->revision)
 402                 ret = tw9910_mask_set(client, HSLOWCTL, 0x77,
 403                                       (hsync->start & 0x0007) << 4 |
 404                                       (hsync->end   & 0x0007));
 405
 406         return ret;
 407 }
 408
 409 static void tw9910_reset(struct i2c_client *client)
 410 {
 411         tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
 412         msleep(1);
 413 }
 414
 415 static int tw9910_power(struct i2c_client *client, int enable)
 416 {
 417         int ret;
 418         u8 acntl1;
 419         u8 acntl2;
 420
 421         if (enable) {
 422                 acntl1 = 0;
 423                 acntl2 = 0;
 424         } else {
 425                 acntl1 = CLK_PDN | Y_PDN | C_PDN;
 426                 acntl2 = PLL_PDN;
 427         }
 428
 429         ret = tw9910_mask_set(client, ACNTL1, ACNTL1_PDN_MASK, acntl1);
 430         if (ret < 0)
 431                 return ret;
 432
 433         return tw9910_mask_set(client, ACNTL2, ACNTL2_PDN_MASK, acntl2);
 434 }
 435
 436 static const struct tw9910_scale_ctrl*
 437 tw9910_select_norm(struct soc_camera_device *icd, u32 width, u32 height)
 438 {
 439         const struct tw9910_scale_ctrl *scale;
 440         const struct tw9910_scale_ctrl *ret = NULL;
 441         v4l2_std_id norm = icd->vdev->current_norm;
 442         __u32 diff = 0xffffffff, tmp;
 443         int size, i;
 444
 445         if (norm & V4L2_STD_NTSC) {
 446                 scale = tw9910_ntsc_scales;
 447                 size = ARRAY_SIZE(tw9910_ntsc_scales);
 448         } else if (norm & V4L2_STD_PAL) {
 449                 scale = tw9910_pal_scales;
 450                 size = ARRAY_SIZE(tw9910_pal_scales);
 451         } else {
 452                 return NULL;
 453         }
 454
 455         for (i = 0; i < size; i++) {
 456                 tmp = abs(width - scale[i].width) +
 457                         abs(height - scale[i].height);
 458                 if (tmp < diff) {
 459                         diff = tmp;
 460                         ret = scale + i;
 461                 }
 462         }
 463
 464         return ret;
 465 }
 466
 467 /*
 468  * soc_camera_ops function
 469  */
 470 static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
 471 {
 472         struct i2c_client *client = sd->priv;
 473         struct tw9910_priv *priv = to_tw9910(client);
 474         u8 val;
 475         int ret;
 476
 477         if (!enable) {
 478                 switch (priv->revision) {
 479                 case 0:
 480                         val = OEN_TRI_SEL_ALL_OFF_r0;
 481                         break;
 482                 case 1:
 483                         val = OEN_TRI_SEL_ALL_OFF_r1;
 484                         break;
 485                 default:
 486                         dev_err(&client->dev, "un-supported revision\n");
 487                         return -EINVAL;
 488                 }
 489         } else {
 490                 val = OEN_TRI_SEL_ALL_ON;
 491
 492                 if (!priv->scale) {
 493                         dev_err(&client->dev, "norm select error\n");
 494                         return -EPERM;
 495                 }
 496
 497                 dev_dbg(&client->dev, "%s %dx%d\n",
 498                         priv->scale->name,
 499                         priv->scale->width,
 500                         priv->scale->height);
 501         }
 502
 503         ret = tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
 504         if (ret < 0)
 505                 return ret;
 506
 507         return tw9910_power(client, enable);
 508 }
 509
 510 static int tw9910_set_bus_param(struct soc_camera_device *icd,
 511                                 unsigned long flags)
 512 {
 513         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 514         struct i2c_client *client = sd->priv;
 515         u8 val = VSSL_VVALID | HSSL_DVALID;
 516
 517         /*
 518          * set OUTCTR1
 519          *
 520          * We use VVALID and DVALID signals to control VSYNC and HSYNC
 521          * outputs, in this mode their polarity is inverted.
 522          */
 523         if (flags & SOCAM_HSYNC_ACTIVE_LOW)
 524                 val |= HSP_HI;
 525
 526         if (flags & SOCAM_VSYNC_ACTIVE_LOW)
 527                 val |= VSP_HI;
 528
 529         return i2c_smbus_write_byte_data(client, OUTCTR1, val);
 530 }
 531
 532 static unsigned long tw9910_query_bus_param(struct soc_camera_device *icd)
 533 {
 534         struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
 535         struct tw9910_priv *priv = to_tw9910(client);
 536         struct soc_camera_link *icl = to_soc_camera_link(icd);
 537         unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
 538                 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
 539                 SOCAM_VSYNC_ACTIVE_LOW  | SOCAM_HSYNC_ACTIVE_LOW  |
 540                 SOCAM_DATA_ACTIVE_HIGH | priv->info->buswidth;
 541
 542         return soc_camera_apply_sensor_flags(icl, flags);
 543 }
 544
 545 static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 546 {
 547         int ret = -EINVAL;
 548
 549         if (norm & (V4L2_STD_NTSC | V4L2_STD_PAL))
 550                 ret = 0;
 551
 552         return ret;
 553 }
 554
 555 static int tw9910_enum_input(struct soc_camera_device *icd,
 556                              struct v4l2_input *inp)
 557 {
 558         inp->type = V4L2_INPUT_TYPE_TUNER;
 559         inp->std  = V4L2_STD_UNKNOWN;
 560         strcpy(inp->name, "Video");
 561
 562         return 0;
 563 }
 564
 565 static int tw9910_g_chip_ident(struct v4l2_subdev *sd,
 566                                struct v4l2_dbg_chip_ident *id)
 567 {
 568         struct i2c_client *client = sd->priv;
 569         struct tw9910_priv *priv = to_tw9910(client);
 570
 571         id->ident = V4L2_IDENT_TW9910;
 572         id->revision = priv->revision;
 573
 574         return 0;
 575 }
 576
 577 #ifdef CONFIG_VIDEO_ADV_DEBUG
 578 static int tw9910_g_register(struct v4l2_subdev *sd,
 579                              struct v4l2_dbg_register *reg)
 580 {
 581         struct i2c_client *client = sd->priv;
 582         int ret;
 583
 584         if (reg->reg > 0xff)
 585                 return -EINVAL;
 586
 587         ret = i2c_smbus_read_byte_data(client, reg->reg);
 588         if (ret < 0)
 589                 return ret;
 590
 591         /*
 592          * ret      = int
 593          * reg->val = __u64
 594          */
 595         reg->val = (__u64)ret;
 596
 597         return 0;
 598 }
 599
 600 static int tw9910_s_register(struct v4l2_subdev *sd,
 601                              struct v4l2_dbg_register *reg)
 602 {
 603         struct i2c_client *client = sd->priv;
 604
 605         if (reg->reg > 0xff ||
 606             reg->val > 0xff)
 607                 return -EINVAL;
 608
 609         return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
 610 }
 611 #endif
 612
 613 static int tw9910_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 614 {
 615         struct v4l2_rect *rect = &a->c;
 616         struct i2c_client *client = sd->priv;
 617         struct tw9910_priv *priv = to_tw9910(client);
 618         struct soc_camera_device *icd = client->dev.platform_data;
 619         int                 ret  = -EINVAL;
 620         u8                  val;
 621
 622         /*
 623          * select suitable norm
 624          */
 625         priv->scale = tw9910_select_norm(icd, rect->width, rect->height);
 626         if (!priv->scale)
 627                 goto tw9910_set_fmt_error;
 628
 629         /*
 630          * reset hardware
 631          */
 632         tw9910_reset(client);
 633
 634         /*
 635          * set bus width
 636          */
 637         val = 0x00;
 638         if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
 639                 val = LEN;
 640
 641         ret = tw9910_mask_set(client, OPFORM, LEN, val);
 642         if (ret < 0)
 643                 goto tw9910_set_fmt_error;
 644
 645         /*
 646          * select MPOUT behavior
 647          */
 648         switch (priv->info->mpout) {
 649         case TW9910_MPO_VLOSS:
 650                 val = RTSEL_VLOSS; break;
 651         case TW9910_MPO_HLOCK:
 652                 val = RTSEL_HLOCK; break;
 653         case TW9910_MPO_SLOCK:
 654                 val = RTSEL_SLOCK; break;
 655         case TW9910_MPO_VLOCK:
 656                 val = RTSEL_VLOCK; break;
 657         case TW9910_MPO_MONO:
 658                 val = RTSEL_MONO;  break;
 659         case TW9910_MPO_DET50:
 660                 val = RTSEL_DET50; break;
 661         case TW9910_MPO_FIELD:
 662                 val = RTSEL_FIELD; break;
 663         case TW9910_MPO_RTCO:
 664                 val = RTSEL_RTCO;  break;
 665         default:
 666                 val = 0;
 667         }
 668
 669         ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
 670         if (ret < 0)
 671                 goto tw9910_set_fmt_error;
 672
 673         /*
 674          * set scale
 675          */
 676         ret = tw9910_set_scale(client, priv->scale);
 677         if (ret < 0)
 678                 goto tw9910_set_fmt_error;
 679
 680         /*
 681          * set hsync
 682          */
 683         ret = tw9910_set_hsync(client, &tw9910_hsync_ctrl);
 684         if (ret < 0)
 685                 goto tw9910_set_fmt_error;
 686
 687         rect->width = priv->scale->width;
 688         rect->height = priv->scale->height;
 689         rect->left = 0;
 690         rect->top = 0;
 691
 692         return ret;
 693
 694 tw9910_set_fmt_error:
 695
 696         tw9910_reset(client);
 697         priv->scale = NULL;
 698
 699         return ret;
 700 }
 701
 702 static int tw9910_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 703 {
 704         struct i2c_client *client = sd->priv;
 705         struct tw9910_priv *priv = to_tw9910(client);
 706
 707         if (!priv->scale) {
 708                 int ret;
 709                 struct v4l2_crop crop = {
 710                         .c = {
 711                                 .left   = 0,
 712                                 .top    = 0,
 713                                 .width  = 640,
 714                                 .height = 480,
 715                         },
 716                 };
 717                 ret = tw9910_s_crop(sd, &crop);
 718                 if (ret < 0)
 719                         return ret;
 720         }
 721
 722         a->c.left       = 0;
 723         a->c.top        = 0;
 724         a->c.width      = priv->scale->width;
 725         a->c.height     = priv->scale->height;
 726         a->type         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 727
 728         return 0;
 729 }
 730
 731 static int tw9910_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 732 {
 733         a->bounds.left                  = 0;
 734         a->bounds.top                   = 0;
 735         a->bounds.width                 = 768;
 736         a->bounds.height                = 576;
 737         a->defrect.left                 = 0;
 738         a->defrect.top                  = 0;
 739         a->defrect.width                = 640;
 740         a->defrect.height               = 480;
 741         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 742         a->pixelaspect.numerator        = 1;
 743         a->pixelaspect.denominator      = 1;
 744
 745         return 0;
 746 }
 747
 748 static int tw9910_g_fmt(struct v4l2_subdev *sd,
 749                         struct v4l2_mbus_framefmt *mf)
 750 {
 751         struct i2c_client *client = sd->priv;
 752         struct tw9910_priv *priv = to_tw9910(client);
 753
 754         if (!priv->scale) {
 755                 int ret;
 756                 struct v4l2_crop crop = {
 757                         .c = {
 758                                 .left   = 0,
 759                                 .top    = 0,
 760                                 .width  = 640,
 761                                 .height = 480,
 762                         },
 763                 };
 764                 ret = tw9910_s_crop(sd, &crop);
 765                 if (ret < 0)
 766                         return ret;
 767         }
 768
 769         mf->width       = priv->scale->width;
 770         mf->height      = priv->scale->height;
 771         mf->code        = V4L2_MBUS_FMT_YUYV8_2X8_BE;
 772         mf->colorspace  = V4L2_COLORSPACE_JPEG;
 773         mf->field       = V4L2_FIELD_INTERLACED_BT;
 774
 775         return 0;
 776 }
 777
 778 static int tw9910_s_fmt(struct v4l2_subdev *sd,
 779                         struct v4l2_mbus_framefmt *mf)
 780 {
 781         struct i2c_client *client = sd->priv;
 782         struct tw9910_priv *priv = to_tw9910(client);
 783         /* See tw9910_s_crop() - no proper cropping support */
 784         struct v4l2_crop a = {
 785                 .c = {
 786                         .left   = 0,
 787                         .top    = 0,
 788                         .width  = mf->width,
 789                         .height = mf->height,
 790                 },
 791         };
 792         int ret;
 793
 794         WARN_ON(mf->field != V4L2_FIELD_ANY &&
 795                 mf->field != V4L2_FIELD_INTERLACED_BT);
 796
 797         /*
 798          * check color format
 799          */
 800         if (mf->code != V4L2_MBUS_FMT_YUYV8_2X8_BE)
 801                 return -EINVAL;
 802
 803         mf->colorspace = V4L2_COLORSPACE_JPEG;
 804
 805         ret = tw9910_s_crop(sd, &a);
 806         if (!ret) {
 807                 mf->width       = priv->scale->width;
 808                 mf->height      = priv->scale->height;
 809         }
 810         return ret;
 811 }
 812
 813 static int tw9910_try_fmt(struct v4l2_subdev *sd,
 814                           struct v4l2_mbus_framefmt *mf)
 815 {
 816         struct i2c_client *client = sd->priv;
 817         struct soc_camera_device *icd = client->dev.platform_data;
 818         const struct tw9910_scale_ctrl *scale;
 819
 820         if (V4L2_FIELD_ANY == mf->field) {
 821                 mf->field = V4L2_FIELD_INTERLACED_BT;
 822         } else if (V4L2_FIELD_INTERLACED_BT != mf->field) {
 823                 dev_err(&client->dev, "Field type %d invalid.\n", mf->field);
 824                 return -EINVAL;
 825         }
 826
 827         mf->code = V4L2_MBUS_FMT_YUYV8_2X8_BE;
 828         mf->colorspace = V4L2_COLORSPACE_JPEG;
 829
 830         /*
 831          * select suitable norm
 832          */
 833         scale = tw9910_select_norm(icd, mf->width, mf->height);
 834         if (!scale)
 835                 return -EINVAL;
 836
 837         mf->width       = scale->width;
 838         mf->height      = scale->height;
 839
 840         return 0;
 841 }
 842
 843 static int tw9910_video_probe(struct soc_camera_device *icd,
 844                               struct i2c_client *client)
 845 {
 846         struct tw9910_priv *priv = to_tw9910(client);
 847         s32 id;
 848
 849         /*
 850          * We must have a parent by now. And it cannot be a wrong one.
 851          * So this entire test is completely redundant.
 852          */
 853         if (!icd->dev.parent ||
 854             to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
 855                 return -ENODEV;
 856
 857         /*
 858          * tw9910 only use 8 or 16 bit bus width
 859          */
 860         if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
 861             SOCAM_DATAWIDTH_8  != priv->info->buswidth) {
 862                 dev_err(&client->dev, "bus width error\n");
 863                 return -ENODEV;
 864         }
 865
 866         /*
 867          * check and show Product ID
 868          * So far only revisions 0 and 1 have been seen
 869          */
 870         id = i2c_smbus_read_byte_data(client, ID);
 871         priv->revision = GET_REV(id);
 872         id = GET_ID(id);
 873
 874         if (0x0B != id ||
 875             0x01 < priv->revision) {
 876                 dev_err(&client->dev,
 877                         "Product ID error %x:%x\n",
 878                         id, priv->revision);
 879                 return -ENODEV;
 880         }
 881
 882         dev_info(&client->dev,
 883                  "tw9910 Product ID %0x:%0x\n", id, priv->revision);
 884
 885         icd->vdev->tvnorms      = V4L2_STD_NTSC | V4L2_STD_PAL;
 886         icd->vdev->current_norm = V4L2_STD_NTSC;
 887
 888         return 0;
 889 }
 890
 891 static struct soc_camera_ops tw9910_ops = {
 892         .set_bus_param          = tw9910_set_bus_param,
 893         .query_bus_param        = tw9910_query_bus_param,
 894         .enum_input             = tw9910_enum_input,
 895 };
 896
 897 static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
 898         .g_chip_ident   = tw9910_g_chip_ident,
 899         .s_std          = tw9910_s_std,
 900 #ifdef CONFIG_VIDEO_ADV_DEBUG
 901         .g_register     = tw9910_g_register,
 902         .s_register     = tw9910_s_register,
 903 #endif
 904 };
 905
 906 static int tw9910_enum_fmt(struct v4l2_subdev *sd, int index,
 907                            enum v4l2_mbus_pixelcode *code)
 908 {
 909         if (index)
 910                 return -EINVAL;
 911
 912         *code = V4L2_MBUS_FMT_YUYV8_2X8_BE;
 913         return 0;
 914 }
 915
 916 static struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
 917         .s_stream       = tw9910_s_stream,
 918         .g_mbus_fmt     = tw9910_g_fmt,
 919         .s_mbus_fmt     = tw9910_s_fmt,
 920         .try_mbus_fmt   = tw9910_try_fmt,
 921         .cropcap        = tw9910_cropcap,
 922         .g_crop         = tw9910_g_crop,
 923         .s_crop         = tw9910_s_crop,
 924         .enum_mbus_fmt  = tw9910_enum_fmt,
 925 };
 926
 927 static struct v4l2_subdev_ops tw9910_subdev_ops = {
 928         .core   = &tw9910_subdev_core_ops,
 929         .video  = &tw9910_subdev_video_ops,
 930 };
 931
 932 /*
 933  * i2c_driver function
 934  */
 935
 936 static int tw9910_probe(struct i2c_client *client,
 937                         const struct i2c_device_id *did)
 938
 939 {
 940         struct tw9910_priv             *priv;
 941         struct tw9910_video_info       *info;
 942         struct soc_camera_device       *icd = client->dev.platform_data;
 943         struct i2c_adapter             *adapter =
 944                 to_i2c_adapter(client->dev.parent);
 945         struct soc_camera_link         *icl;
 946         int                             ret;
 947
 948         if (!icd) {
 949                 dev_err(&client->dev, "TW9910: missing soc-camera data!\n");
 950                 return -EINVAL;
 951         }
 952
 953         icl = to_soc_camera_link(icd);
 954         if (!icl || !icl->priv)
 955                 return -EINVAL;
 956
 957         info = icl->priv;
 958
 959         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 960                 dev_err(&client->dev,
 961                         "I2C-Adapter doesn't support "
 962                         "I2C_FUNC_SMBUS_BYTE_DATA\n");
 963                 return -EIO;
 964         }
 965
 966         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 967         if (!priv)
 968                 return -ENOMEM;
 969
 970         priv->info   = info;
 971
 972         v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
 973
 974         icd->ops     = &tw9910_ops;
 975         icd->iface   = icl->bus_id;
 976
 977         ret = tw9910_video_probe(icd, client);
 978         if (ret) {
 979                 icd->ops = NULL;
 980                 i2c_set_clientdata(client, NULL);
 981                 kfree(priv);
 982         }
 983
 984         return ret;
 985 }
 986
 987 static int tw9910_remove(struct i2c_client *client)
 988 {
 989         struct tw9910_priv *priv = to_tw9910(client);
 990         struct soc_camera_device *icd = client->dev.platform_data;
 991
 992         icd->ops = NULL;
 993         i2c_set_clientdata(client, NULL);
 994         kfree(priv);
 995         return 0;
 996 }
 997
 998 static const struct i2c_device_id tw9910_id[] = {
 999         { "tw9910", 0 },
1000         { }
1001 };
1002 MODULE_DEVICE_TABLE(i2c, tw9910_id);
1003
1004 static struct i2c_driver tw9910_i2c_driver = {
1005         .driver = {
1006                 .name = "tw9910",
1007         },
1008         .probe    = tw9910_probe,
1009         .remove   = tw9910_remove,
1010         .id_table = tw9910_id,
1011 };
1012
1013 /*
1014  * module function
1015  */
1016 static int __init tw9910_module_init(void)
1017 {
1018         return i2c_add_driver(&tw9910_i2c_driver);
1019 }
1020
1021 static void __exit tw9910_module_exit(void)
1022 {
1023         i2c_del_driver(&tw9910_i2c_driver);
1024 }
1025
1026 module_init(tw9910_module_init);
1027 module_exit(tw9910_module_exit);
1028
1029 MODULE_DESCRIPTION("SoC Camera driver for tw9910");
1030 MODULE_AUTHOR("Kuninori Morimoto");
1031 MODULE_LICENSE("GPL v2");