drivers/media/i2c/soc_camera/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/i2c/tw9910.h>
  30 #include <media/v4l2-clk.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 v4l2_clk                 *clk;
 232         struct tw9910_video_info        *info;
 233         const struct tw9910_scale_ctrl  *scale;
 234         v4l2_std_id                     norm;
 235         u32                             revision;
 236 };
 237
 238 static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
 239         {
 240                 .name   = "NTSC SQ",
 241                 .width  = 640,
 242                 .height = 480,
 243                 .hscale = 0x0100,
 244                 .vscale = 0x0100,
 245         },
 246         {
 247                 .name   = "NTSC CCIR601",
 248                 .width  = 720,
 249                 .height = 480,
 250                 .hscale = 0x0100,
 251                 .vscale = 0x0100,
 252         },
 253         {
 254                 .name   = "NTSC SQ (CIF)",
 255                 .width  = 320,
 256                 .height = 240,
 257                 .hscale = 0x0200,
 258                 .vscale = 0x0200,
 259         },
 260         {
 261                 .name   = "NTSC CCIR601 (CIF)",
 262                 .width  = 360,
 263                 .height = 240,
 264                 .hscale = 0x0200,
 265                 .vscale = 0x0200,
 266         },
 267         {
 268                 .name   = "NTSC SQ (QCIF)",
 269                 .width  = 160,
 270                 .height = 120,
 271                 .hscale = 0x0400,
 272                 .vscale = 0x0400,
 273         },
 274         {
 275                 .name   = "NTSC CCIR601 (QCIF)",
 276                 .width  = 180,
 277                 .height = 120,
 278                 .hscale = 0x0400,
 279                 .vscale = 0x0400,
 280         },
 281 };
 282
 283 static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
 284         {
 285                 .name   = "PAL SQ",
 286                 .width  = 768,
 287                 .height = 576,
 288                 .hscale = 0x0100,
 289                 .vscale = 0x0100,
 290         },
 291         {
 292                 .name   = "PAL CCIR601",
 293                 .width  = 720,
 294                 .height = 576,
 295                 .hscale = 0x0100,
 296                 .vscale = 0x0100,
 297         },
 298         {
 299                 .name   = "PAL SQ (CIF)",
 300                 .width  = 384,
 301                 .height = 288,
 302                 .hscale = 0x0200,
 303                 .vscale = 0x0200,
 304         },
 305         {
 306                 .name   = "PAL CCIR601 (CIF)",
 307                 .width  = 360,
 308                 .height = 288,
 309                 .hscale = 0x0200,
 310                 .vscale = 0x0200,
 311         },
 312         {
 313                 .name   = "PAL SQ (QCIF)",
 314                 .width  = 192,
 315                 .height = 144,
 316                 .hscale = 0x0400,
 317                 .vscale = 0x0400,
 318         },
 319         {
 320                 .name   = "PAL CCIR601 (QCIF)",
 321                 .width  = 180,
 322                 .height = 144,
 323                 .hscale = 0x0400,
 324                 .vscale = 0x0400,
 325         },
 326 };
 327
 328 /*
 329  * general function
 330  */
 331 static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
 332 {
 333         return container_of(i2c_get_clientdata(client), struct tw9910_priv,
 334                             subdev);
 335 }
 336
 337 static int tw9910_mask_set(struct i2c_client *client, u8 command,
 338                            u8 mask, u8 set)
 339 {
 340         s32 val = i2c_smbus_read_byte_data(client, command);
 341         if (val < 0)
 342                 return val;
 343
 344         val &= ~mask;
 345         val |= set & mask;
 346
 347         return i2c_smbus_write_byte_data(client, command, val);
 348 }
 349
 350 static int tw9910_set_scale(struct i2c_client *client,
 351                             const struct tw9910_scale_ctrl *scale)
 352 {
 353         int ret;
 354
 355         ret = i2c_smbus_write_byte_data(client, SCALE_HI,
 356                                         (scale->vscale & 0x0F00) >> 4 |
 357                                         (scale->hscale & 0x0F00) >> 8);
 358         if (ret < 0)
 359                 return ret;
 360
 361         ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
 362                                         scale->hscale & 0x00FF);
 363         if (ret < 0)
 364                 return ret;
 365
 366         ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
 367                                         scale->vscale & 0x00FF);
 368
 369         return ret;
 370 }
 371
 372 static int tw9910_set_hsync(struct i2c_client *client)
 373 {
 374         struct tw9910_priv *priv = to_tw9910(client);
 375         int ret;
 376
 377         /* bit 10 - 3 */
 378         ret = i2c_smbus_write_byte_data(client, HSBEGIN,
 379                                         (HSYNC_START & 0x07F8) >> 3);
 380         if (ret < 0)
 381                 return ret;
 382
 383         /* bit 10 - 3 */
 384         ret = i2c_smbus_write_byte_data(client, HSEND,
 385                                         (HSYNC_END & 0x07F8) >> 3);
 386         if (ret < 0)
 387                 return ret;
 388
 389         /* So far only revisions 0 and 1 have been seen */
 390         /* bit 2 - 0 */
 391         if (1 == priv->revision)
 392                 ret = tw9910_mask_set(client, HSLOWCTL, 0x77,
 393                                       (HSYNC_START & 0x0007) << 4 |
 394                                       (HSYNC_END   & 0x0007));
 395
 396         return ret;
 397 }
 398
 399 static void tw9910_reset(struct i2c_client *client)
 400 {
 401         tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
 402         msleep(1);
 403 }
 404
 405 static int tw9910_power(struct i2c_client *client, int enable)
 406 {
 407         int ret;
 408         u8 acntl1;
 409         u8 acntl2;
 410
 411         if (enable) {
 412                 acntl1 = 0;
 413                 acntl2 = 0;
 414         } else {
 415                 acntl1 = CLK_PDN | Y_PDN | C_PDN;
 416                 acntl2 = PLL_PDN;
 417         }
 418
 419         ret = tw9910_mask_set(client, ACNTL1, ACNTL1_PDN_MASK, acntl1);
 420         if (ret < 0)
 421                 return ret;
 422
 423         return tw9910_mask_set(client, ACNTL2, ACNTL2_PDN_MASK, acntl2);
 424 }
 425
 426 static const struct tw9910_scale_ctrl *tw9910_select_norm(v4l2_std_id norm,
 427                                                           u32 width, u32 height)
 428 {
 429         const struct tw9910_scale_ctrl *scale;
 430         const struct tw9910_scale_ctrl *ret = NULL;
 431         __u32 diff = 0xffffffff, tmp;
 432         int size, i;
 433
 434         if (norm & V4L2_STD_NTSC) {
 435                 scale = tw9910_ntsc_scales;
 436                 size = ARRAY_SIZE(tw9910_ntsc_scales);
 437         } else if (norm & V4L2_STD_PAL) {
 438                 scale = tw9910_pal_scales;
 439                 size = ARRAY_SIZE(tw9910_pal_scales);
 440         } else {
 441                 return NULL;
 442         }
 443
 444         for (i = 0; i < size; i++) {
 445                 tmp = abs(width - scale[i].width) +
 446                         abs(height - scale[i].height);
 447                 if (tmp < diff) {
 448                         diff = tmp;
 449                         ret = scale + i;
 450                 }
 451         }
 452
 453         return ret;
 454 }
 455
 456 /*
 457  * subdevice operations
 458  */
 459 static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
 460 {
 461         struct i2c_client *client = v4l2_get_subdevdata(sd);
 462         struct tw9910_priv *priv = to_tw9910(client);
 463         u8 val;
 464         int ret;
 465
 466         if (!enable) {
 467                 switch (priv->revision) {
 468                 case 0:
 469                         val = OEN_TRI_SEL_ALL_OFF_r0;
 470                         break;
 471                 case 1:
 472                         val = OEN_TRI_SEL_ALL_OFF_r1;
 473                         break;
 474                 default:
 475                         dev_err(&client->dev, "un-supported revision\n");
 476                         return -EINVAL;
 477                 }
 478         } else {
 479                 val = OEN_TRI_SEL_ALL_ON;
 480
 481                 if (!priv->scale) {
 482                         dev_err(&client->dev, "norm select error\n");
 483                         return -EPERM;
 484                 }
 485
 486                 dev_dbg(&client->dev, "%s %dx%d\n",
 487                         priv->scale->name,
 488                         priv->scale->width,
 489                         priv->scale->height);
 490         }
 491
 492         ret = tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
 493         if (ret < 0)
 494                 return ret;
 495
 496         return tw9910_power(client, enable);
 497 }
 498
 499 static int tw9910_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
 500 {
 501         struct i2c_client *client = v4l2_get_subdevdata(sd);
 502         struct tw9910_priv *priv = to_tw9910(client);
 503
 504         *norm = priv->norm;
 505
 506         return 0;
 507 }
 508
 509 static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 510 {
 511         struct i2c_client *client = v4l2_get_subdevdata(sd);
 512         struct tw9910_priv *priv = to_tw9910(client);
 513         const unsigned hact = 720;
 514         const unsigned hdelay = 15;
 515         unsigned vact;
 516         unsigned vdelay;
 517         int ret;
 518
 519         if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
 520                 return -EINVAL;
 521
 522         priv->norm = norm;
 523         if (norm & V4L2_STD_525_60) {
 524                 vact = 240;
 525                 vdelay = 18;
 526                 ret = tw9910_mask_set(client, VVBI, 0x10, 0x10);
 527         } else {
 528                 vact = 288;
 529                 vdelay = 24;
 530                 ret = tw9910_mask_set(client, VVBI, 0x10, 0x00);
 531         }
 532         if (!ret)
 533                 ret = i2c_smbus_write_byte_data(client, CROP_HI,
 534                         ((vdelay >> 2) & 0xc0) |
 535                         ((vact >> 4) & 0x30) |
 536                         ((hdelay >> 6) & 0x0c) |
 537                         ((hact >> 8) & 0x03));
 538         if (!ret)
 539                 ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
 540                         vdelay & 0xff);
 541         if (!ret)
 542                 ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
 543                         vact & 0xff);
 544
 545         return ret;
 546 }
 547
 548 #ifdef CONFIG_VIDEO_ADV_DEBUG
 549 static int tw9910_g_register(struct v4l2_subdev *sd,
 550                              struct v4l2_dbg_register *reg)
 551 {
 552         struct i2c_client *client = v4l2_get_subdevdata(sd);
 553         int ret;
 554
 555         if (reg->reg > 0xff)
 556                 return -EINVAL;
 557
 558         reg->size = 1;
 559         ret = i2c_smbus_read_byte_data(client, reg->reg);
 560         if (ret < 0)
 561                 return ret;
 562
 563         /*
 564          * ret      = int
 565          * reg->val = __u64
 566          */
 567         reg->val = (__u64)ret;
 568
 569         return 0;
 570 }
 571
 572 static int tw9910_s_register(struct v4l2_subdev *sd,
 573                              const struct v4l2_dbg_register *reg)
 574 {
 575         struct i2c_client *client = v4l2_get_subdevdata(sd);
 576
 577         if (reg->reg > 0xff ||
 578             reg->val > 0xff)
 579                 return -EINVAL;
 580
 581         return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
 582 }
 583 #endif
 584
 585 static int tw9910_s_power(struct v4l2_subdev *sd, int on)
 586 {
 587         struct i2c_client *client = v4l2_get_subdevdata(sd);
 588         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 589         struct tw9910_priv *priv = to_tw9910(client);
 590
 591         return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
 592 }
 593
 594 static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
 595 {
 596         struct i2c_client *client = v4l2_get_subdevdata(sd);
 597         struct tw9910_priv *priv = to_tw9910(client);
 598         int ret = -EINVAL;
 599         u8 val;
 600
 601         /*
 602          * select suitable norm
 603          */
 604         priv->scale = tw9910_select_norm(priv->norm, *width, *height);
 605         if (!priv->scale)
 606                 goto tw9910_set_fmt_error;
 607
 608         /*
 609          * reset hardware
 610          */
 611         tw9910_reset(client);
 612
 613         /*
 614          * set bus width
 615          */
 616         val = 0x00;
 617         if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
 618                 val = LEN;
 619
 620         ret = tw9910_mask_set(client, OPFORM, LEN, val);
 621         if (ret < 0)
 622                 goto tw9910_set_fmt_error;
 623
 624         /*
 625          * select MPOUT behavior
 626          */
 627         switch (priv->info->mpout) {
 628         case TW9910_MPO_VLOSS:
 629                 val = RTSEL_VLOSS; break;
 630         case TW9910_MPO_HLOCK:
 631                 val = RTSEL_HLOCK; break;
 632         case TW9910_MPO_SLOCK:
 633                 val = RTSEL_SLOCK; break;
 634         case TW9910_MPO_VLOCK:
 635                 val = RTSEL_VLOCK; break;
 636         case TW9910_MPO_MONO:
 637                 val = RTSEL_MONO;  break;
 638         case TW9910_MPO_DET50:
 639                 val = RTSEL_DET50; break;
 640         case TW9910_MPO_FIELD:
 641                 val = RTSEL_FIELD; break;
 642         case TW9910_MPO_RTCO:
 643                 val = RTSEL_RTCO;  break;
 644         default:
 645                 val = 0;
 646         }
 647
 648         ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
 649         if (ret < 0)
 650                 goto tw9910_set_fmt_error;
 651
 652         /*
 653          * set scale
 654          */
 655         ret = tw9910_set_scale(client, priv->scale);
 656         if (ret < 0)
 657                 goto tw9910_set_fmt_error;
 658
 659         /*
 660          * set hsync
 661          */
 662         ret = tw9910_set_hsync(client);
 663         if (ret < 0)
 664                 goto tw9910_set_fmt_error;
 665
 666         *width = priv->scale->width;
 667         *height = priv->scale->height;
 668
 669         return ret;
 670
 671 tw9910_set_fmt_error:
 672
 673         tw9910_reset(client);
 674         priv->scale = NULL;
 675
 676         return ret;
 677 }
 678
 679 static int tw9910_get_selection(struct v4l2_subdev *sd,
 680                 struct v4l2_subdev_pad_config *cfg,
 681                 struct v4l2_subdev_selection *sel)
 682 {
 683         struct i2c_client *client = v4l2_get_subdevdata(sd);
 684         struct tw9910_priv *priv = to_tw9910(client);
 685
 686         if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 687                 return -EINVAL;
 688         /* Only CROP, CROP_DEFAULT and CROP_BOUNDS are supported */
 689         if (sel->target > V4L2_SEL_TGT_CROP_BOUNDS)
 690                 return -EINVAL;
 691
 692         sel->r.left     = 0;
 693         sel->r.top      = 0;
 694         if (priv->norm & V4L2_STD_NTSC) {
 695                 sel->r.width    = 640;
 696                 sel->r.height   = 480;
 697         } else {
 698                 sel->r.width    = 768;
 699                 sel->r.height   = 576;
 700         }
 701         return 0;
 702 }
 703
 704 static int tw9910_get_fmt(struct v4l2_subdev *sd,
 705                 struct v4l2_subdev_pad_config *cfg,
 706                 struct v4l2_subdev_format *format)
 707 {
 708         struct v4l2_mbus_framefmt *mf = &format->format;
 709         struct i2c_client *client = v4l2_get_subdevdata(sd);
 710         struct tw9910_priv *priv = to_tw9910(client);
 711
 712         if (format->pad)
 713                 return -EINVAL;
 714
 715         if (!priv->scale) {
 716                 priv->scale = tw9910_select_norm(priv->norm, 640, 480);
 717                 if (!priv->scale)
 718                         return -EINVAL;
 719         }
 720
 721         mf->width       = priv->scale->width;
 722         mf->height      = priv->scale->height;
 723         mf->code        = MEDIA_BUS_FMT_UYVY8_2X8;
 724         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 725         mf->field       = V4L2_FIELD_INTERLACED_BT;
 726
 727         return 0;
 728 }
 729
 730 static int tw9910_s_fmt(struct v4l2_subdev *sd,
 731                         struct v4l2_mbus_framefmt *mf)
 732 {
 733         u32 width = mf->width, height = mf->height;
 734         int ret;
 735
 736         WARN_ON(mf->field != V4L2_FIELD_ANY &&
 737                 mf->field != V4L2_FIELD_INTERLACED_BT);
 738
 739         /*
 740          * check color format
 741          */
 742         if (mf->code != MEDIA_BUS_FMT_UYVY8_2X8)
 743                 return -EINVAL;
 744
 745         mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
 746
 747         ret = tw9910_set_frame(sd, &width, &height);
 748         if (!ret) {
 749                 mf->width       = width;
 750                 mf->height      = height;
 751         }
 752         return ret;
 753 }
 754
 755 static int tw9910_set_fmt(struct v4l2_subdev *sd,
 756                 struct v4l2_subdev_pad_config *cfg,
 757                 struct v4l2_subdev_format *format)
 758 {
 759         struct v4l2_mbus_framefmt *mf = &format->format;
 760         struct i2c_client *client = v4l2_get_subdevdata(sd);
 761         struct tw9910_priv *priv = to_tw9910(client);
 762         const struct tw9910_scale_ctrl *scale;
 763
 764         if (format->pad)
 765                 return -EINVAL;
 766
 767         if (V4L2_FIELD_ANY == mf->field) {
 768                 mf->field = V4L2_FIELD_INTERLACED_BT;
 769         } else if (V4L2_FIELD_INTERLACED_BT != mf->field) {
 770                 dev_err(&client->dev, "Field type %d invalid.\n", mf->field);
 771                 return -EINVAL;
 772         }
 773
 774         mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 775         mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
 776
 777         /*
 778          * select suitable norm
 779          */
 780         scale = tw9910_select_norm(priv->norm, mf->width, mf->height);
 781         if (!scale)
 782                 return -EINVAL;
 783
 784         mf->width       = scale->width;
 785         mf->height      = scale->height;
 786
 787         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 788                 return tw9910_s_fmt(sd, mf);
 789         cfg->try_fmt = *mf;
 790         return 0;
 791 }
 792
 793 static int tw9910_video_probe(struct i2c_client *client)
 794 {
 795         struct tw9910_priv *priv = to_tw9910(client);
 796         s32 id;
 797         int ret;
 798
 799         /*
 800          * tw9910 only use 8 or 16 bit bus width
 801          */
 802         if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
 803             SOCAM_DATAWIDTH_8  != priv->info->buswidth) {
 804                 dev_err(&client->dev, "bus width error\n");
 805                 return -ENODEV;
 806         }
 807
 808         ret = tw9910_s_power(&priv->subdev, 1);
 809         if (ret < 0)
 810                 return ret;
 811
 812         /*
 813          * check and show Product ID
 814          * So far only revisions 0 and 1 have been seen
 815          */
 816         id = i2c_smbus_read_byte_data(client, ID);
 817         priv->revision = GET_REV(id);
 818         id = GET_ID(id);
 819
 820         if (0x0B != id ||
 821             0x01 < priv->revision) {
 822                 dev_err(&client->dev,
 823                         "Product ID error %x:%x\n",
 824                         id, priv->revision);
 825                 ret = -ENODEV;
 826                 goto done;
 827         }
 828
 829         dev_info(&client->dev,
 830                  "tw9910 Product ID %0x:%0x\n", id, priv->revision);
 831
 832         priv->norm = V4L2_STD_NTSC;
 833         priv->scale = &tw9910_ntsc_scales[0];
 834
 835 done:
 836         tw9910_s_power(&priv->subdev, 0);
 837         return ret;
 838 }
 839
 840 static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
 841 #ifdef CONFIG_VIDEO_ADV_DEBUG
 842         .g_register     = tw9910_g_register,
 843         .s_register     = tw9910_s_register,
 844 #endif
 845         .s_power        = tw9910_s_power,
 846 };
 847
 848 static int tw9910_enum_mbus_code(struct v4l2_subdev *sd,
 849                 struct v4l2_subdev_pad_config *cfg,
 850                 struct v4l2_subdev_mbus_code_enum *code)
 851 {
 852         if (code->pad || code->index)
 853                 return -EINVAL;
 854
 855         code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 856         return 0;
 857 }
 858
 859 static int tw9910_g_mbus_config(struct v4l2_subdev *sd,
 860                                 struct v4l2_mbus_config *cfg)
 861 {
 862         struct i2c_client *client = v4l2_get_subdevdata(sd);
 863         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 864
 865         cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
 866                 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
 867                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
 868                 V4L2_MBUS_DATA_ACTIVE_HIGH;
 869         cfg->type = V4L2_MBUS_PARALLEL;
 870         cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
 871
 872         return 0;
 873 }
 874
 875 static int tw9910_s_mbus_config(struct v4l2_subdev *sd,
 876                                 const struct v4l2_mbus_config *cfg)
 877 {
 878         struct i2c_client *client = v4l2_get_subdevdata(sd);
 879         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 880         u8 val = VSSL_VVALID | HSSL_DVALID;
 881         unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
 882
 883         /*
 884          * set OUTCTR1
 885          *
 886          * We use VVALID and DVALID signals to control VSYNC and HSYNC
 887          * outputs, in this mode their polarity is inverted.
 888          */
 889         if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
 890                 val |= HSP_HI;
 891
 892         if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
 893                 val |= VSP_HI;
 894
 895         return i2c_smbus_write_byte_data(client, OUTCTR1, val);
 896 }
 897
 898 static int tw9910_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
 899 {
 900         *norm = V4L2_STD_NTSC | V4L2_STD_PAL;
 901         return 0;
 902 }
 903
 904 static struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
 905         .s_std          = tw9910_s_std,
 906         .g_std          = tw9910_g_std,
 907         .s_stream       = tw9910_s_stream,
 908         .g_mbus_config  = tw9910_g_mbus_config,
 909         .s_mbus_config  = tw9910_s_mbus_config,
 910         .g_tvnorms      = tw9910_g_tvnorms,
 911 };
 912
 913 static const struct v4l2_subdev_pad_ops tw9910_subdev_pad_ops = {
 914         .enum_mbus_code = tw9910_enum_mbus_code,
 915         .get_selection  = tw9910_get_selection,
 916         .get_fmt        = tw9910_get_fmt,
 917         .set_fmt        = tw9910_set_fmt,
 918 };
 919
 920 static struct v4l2_subdev_ops tw9910_subdev_ops = {
 921         .core   = &tw9910_subdev_core_ops,
 922         .video  = &tw9910_subdev_video_ops,
 923         .pad    = &tw9910_subdev_pad_ops,
 924 };
 925
 926 /*
 927  * i2c_driver function
 928  */
 929
 930 static int tw9910_probe(struct i2c_client *client,
 931                         const struct i2c_device_id *did)
 932
 933 {
 934         struct tw9910_priv              *priv;
 935         struct tw9910_video_info        *info;
 936         struct i2c_adapter              *adapter =
 937                 to_i2c_adapter(client->dev.parent);
 938         struct soc_camera_subdev_desc   *ssdd = soc_camera_i2c_to_desc(client);
 939         int ret;
 940
 941         if (!ssdd || !ssdd->drv_priv) {
 942                 dev_err(&client->dev, "TW9910: missing platform data!\n");
 943                 return -EINVAL;
 944         }
 945
 946         info = ssdd->drv_priv;
 947
 948         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 949                 dev_err(&client->dev,
 950                         "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE_DATA\n");
 951                 return -EIO;
 952         }
 953
 954         priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
 955         if (!priv)
 956                 return -ENOMEM;
 957
 958         priv->info   = info;
 959
 960         v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
 961
 962         priv->clk = v4l2_clk_get(&client->dev, "mclk");
 963         if (IS_ERR(priv->clk))
 964                 return PTR_ERR(priv->clk);
 965
 966         ret = tw9910_video_probe(client);
 967         if (ret < 0)
 968                 v4l2_clk_put(priv->clk);
 969
 970         return ret;
 971 }
 972
 973 static int tw9910_remove(struct i2c_client *client)
 974 {
 975         struct tw9910_priv *priv = to_tw9910(client);
 976         v4l2_clk_put(priv->clk);
 977         return 0;
 978 }
 979
 980 static const struct i2c_device_id tw9910_id[] = {
 981         { "tw9910", 0 },
 982         { }
 983 };
 984 MODULE_DEVICE_TABLE(i2c, tw9910_id);
 985
 986 static struct i2c_driver tw9910_i2c_driver = {
 987         .driver = {
 988                 .name = "tw9910",
 989         },
 990         .probe    = tw9910_probe,
 991         .remove   = tw9910_remove,
 992         .id_table = tw9910_id,
 993 };
 994
 995 module_i2c_driver(tw9910_i2c_driver);
 996
 997 MODULE_DESCRIPTION("SoC Camera driver for tw9910");
 998 MODULE_AUTHOR("Kuninori Morimoto");
 999 MODULE_LICENSE("GPL v2");