linux/drivers/media/i2c/soc_camera/tw9910.c
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   1/*
   2 * tw9910 Video Driver
   3 *
   4 * Copyright (C) 2008 Renesas Solutions Corp.
   5 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
   6 *
   7 * Based on ov772x driver,
   8 *
   9 * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
  10 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
  11 * Copyright (C) 2008 Magnus Damm
  12 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
  13 *
  14 * This program is free software; you can redistribute it and/or modify
  15 * it under the terms of the GNU General Public License version 2 as
  16 * published by the Free Software Foundation.
  17 */
  18
  19#include <linux/init.h>
  20#include <linux/module.h>
  21#include <linux/i2c.h>
  22#include <linux/slab.h>
  23#include <linux/kernel.h>
  24#include <linux/delay.h>
  25#include <linux/v4l2-mediabus.h>
  26#include <linux/videodev2.h>
  27
  28#include <media/soc_camera.h>
  29#include <media/tw9910.h>
  30#include <media/v4l2-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
 216struct regval_list {
 217        unsigned char reg_num;
 218        unsigned char value;
 219};
 220
 221struct tw9910_scale_ctrl {
 222        char           *name;
 223        unsigned short  width;
 224        unsigned short  height;
 225        u16             hscale;
 226        u16             vscale;
 227};
 228
 229struct 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
 238static 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
 283static 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 */
 331static 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
 337static 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
 350static 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
 372static 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
 399static void tw9910_reset(struct i2c_client *client)
 400{
 401        tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
 402        msleep(1);
 403}
 404
 405static 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
 426static 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 */
 459static 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
 499static 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
 509static 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
 514        if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
 515                return -EINVAL;
 516
 517        priv->norm = norm;
 518
 519        return 0;
 520}
 521
 522#ifdef CONFIG_VIDEO_ADV_DEBUG
 523static int tw9910_g_register(struct v4l2_subdev *sd,
 524                             struct v4l2_dbg_register *reg)
 525{
 526        struct i2c_client *client = v4l2_get_subdevdata(sd);
 527        int ret;
 528
 529        if (reg->reg > 0xff)
 530                return -EINVAL;
 531
 532        reg->size = 1;
 533        ret = i2c_smbus_read_byte_data(client, reg->reg);
 534        if (ret < 0)
 535                return ret;
 536
 537        /*
 538         * ret      = int
 539         * reg->val = __u64
 540         */
 541        reg->val = (__u64)ret;
 542
 543        return 0;
 544}
 545
 546static int tw9910_s_register(struct v4l2_subdev *sd,
 547                             const struct v4l2_dbg_register *reg)
 548{
 549        struct i2c_client *client = v4l2_get_subdevdata(sd);
 550
 551        if (reg->reg > 0xff ||
 552            reg->val > 0xff)
 553                return -EINVAL;
 554
 555        return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
 556}
 557#endif
 558
 559static int tw9910_s_power(struct v4l2_subdev *sd, int on)
 560{
 561        struct i2c_client *client = v4l2_get_subdevdata(sd);
 562        struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 563        struct tw9910_priv *priv = to_tw9910(client);
 564
 565        return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
 566}
 567
 568static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
 569{
 570        struct i2c_client *client = v4l2_get_subdevdata(sd);
 571        struct tw9910_priv *priv = to_tw9910(client);
 572        int ret = -EINVAL;
 573        u8 val;
 574
 575        /*
 576         * select suitable norm
 577         */
 578        priv->scale = tw9910_select_norm(priv->norm, *width, *height);
 579        if (!priv->scale)
 580                goto tw9910_set_fmt_error;
 581
 582        /*
 583         * reset hardware
 584         */
 585        tw9910_reset(client);
 586
 587        /*
 588         * set bus width
 589         */
 590        val = 0x00;
 591        if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
 592                val = LEN;
 593
 594        ret = tw9910_mask_set(client, OPFORM, LEN, val);
 595        if (ret < 0)
 596                goto tw9910_set_fmt_error;
 597
 598        /*
 599         * select MPOUT behavior
 600         */
 601        switch (priv->info->mpout) {
 602        case TW9910_MPO_VLOSS:
 603                val = RTSEL_VLOSS; break;
 604        case TW9910_MPO_HLOCK:
 605                val = RTSEL_HLOCK; break;
 606        case TW9910_MPO_SLOCK:
 607                val = RTSEL_SLOCK; break;
 608        case TW9910_MPO_VLOCK:
 609                val = RTSEL_VLOCK; break;
 610        case TW9910_MPO_MONO:
 611                val = RTSEL_MONO;  break;
 612        case TW9910_MPO_DET50:
 613                val = RTSEL_DET50; break;
 614        case TW9910_MPO_FIELD:
 615                val = RTSEL_FIELD; break;
 616        case TW9910_MPO_RTCO:
 617                val = RTSEL_RTCO;  break;
 618        default:
 619                val = 0;
 620        }
 621
 622        ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
 623        if (ret < 0)
 624                goto tw9910_set_fmt_error;
 625
 626        /*
 627         * set scale
 628         */
 629        ret = tw9910_set_scale(client, priv->scale);
 630        if (ret < 0)
 631                goto tw9910_set_fmt_error;
 632
 633        /*
 634         * set hsync
 635         */
 636        ret = tw9910_set_hsync(client);
 637        if (ret < 0)
 638                goto tw9910_set_fmt_error;
 639
 640        *width = priv->scale->width;
 641        *height = priv->scale->height;
 642
 643        return ret;
 644
 645tw9910_set_fmt_error:
 646
 647        tw9910_reset(client);
 648        priv->scale = NULL;
 649
 650        return ret;
 651}
 652
 653static int tw9910_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 654{
 655        struct i2c_client *client = v4l2_get_subdevdata(sd);
 656        struct tw9910_priv *priv = to_tw9910(client);
 657
 658        a->c.left       = 0;
 659        a->c.top        = 0;
 660        if (priv->norm & V4L2_STD_NTSC) {
 661                a->c.width      = 640;
 662                a->c.height     = 480;
 663        } else {
 664                a->c.width      = 768;
 665                a->c.height     = 576;
 666        }
 667        a->type         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 668
 669        return 0;
 670}
 671
 672static int tw9910_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 673{
 674        struct i2c_client *client = v4l2_get_subdevdata(sd);
 675        struct tw9910_priv *priv = to_tw9910(client);
 676
 677        a->bounds.left                  = 0;
 678        a->bounds.top                   = 0;
 679        if (priv->norm & V4L2_STD_NTSC) {
 680                a->bounds.width         = 640;
 681                a->bounds.height        = 480;
 682        } else {
 683                a->bounds.width         = 768;
 684                a->bounds.height        = 576;
 685        }
 686        a->defrect                      = a->bounds;
 687        a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 688        a->pixelaspect.numerator        = 1;
 689        a->pixelaspect.denominator      = 1;
 690
 691        return 0;
 692}
 693
 694static int tw9910_g_fmt(struct v4l2_subdev *sd,
 695                        struct v4l2_mbus_framefmt *mf)
 696{
 697        struct i2c_client *client = v4l2_get_subdevdata(sd);
 698        struct tw9910_priv *priv = to_tw9910(client);
 699
 700        if (!priv->scale) {
 701                priv->scale = tw9910_select_norm(priv->norm, 640, 480);
 702                if (!priv->scale)
 703                        return -EINVAL;
 704        }
 705
 706        mf->width       = priv->scale->width;
 707        mf->height      = priv->scale->height;
 708        mf->code        = MEDIA_BUS_FMT_UYVY8_2X8;
 709        mf->colorspace  = V4L2_COLORSPACE_JPEG;
 710        mf->field       = V4L2_FIELD_INTERLACED_BT;
 711
 712        return 0;
 713}
 714
 715static int tw9910_s_fmt(struct v4l2_subdev *sd,
 716                        struct v4l2_mbus_framefmt *mf)
 717{
 718        u32 width = mf->width, height = mf->height;
 719        int ret;
 720
 721        WARN_ON(mf->field != V4L2_FIELD_ANY &&
 722                mf->field != V4L2_FIELD_INTERLACED_BT);
 723
 724        /*
 725         * check color format
 726         */
 727        if (mf->code != MEDIA_BUS_FMT_UYVY8_2X8)
 728                return -EINVAL;
 729
 730        mf->colorspace = V4L2_COLORSPACE_JPEG;
 731
 732        ret = tw9910_set_frame(sd, &width, &height);
 733        if (!ret) {
 734                mf->width       = width;
 735                mf->height      = height;
 736        }
 737        return ret;
 738}
 739
 740static int tw9910_try_fmt(struct v4l2_subdev *sd,
 741                          struct v4l2_mbus_framefmt *mf)
 742{
 743        struct i2c_client *client = v4l2_get_subdevdata(sd);
 744        struct tw9910_priv *priv = to_tw9910(client);
 745        const struct tw9910_scale_ctrl *scale;
 746
 747        if (V4L2_FIELD_ANY == mf->field) {
 748                mf->field = V4L2_FIELD_INTERLACED_BT;
 749        } else if (V4L2_FIELD_INTERLACED_BT != mf->field) {
 750                dev_err(&client->dev, "Field type %d invalid.\n", mf->field);
 751                return -EINVAL;
 752        }
 753
 754        mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 755        mf->colorspace = V4L2_COLORSPACE_JPEG;
 756
 757        /*
 758         * select suitable norm
 759         */
 760        scale = tw9910_select_norm(priv->norm, mf->width, mf->height);
 761        if (!scale)
 762                return -EINVAL;
 763
 764        mf->width       = scale->width;
 765        mf->height      = scale->height;
 766
 767        return 0;
 768}
 769
 770static int tw9910_video_probe(struct i2c_client *client)
 771{
 772        struct tw9910_priv *priv = to_tw9910(client);
 773        s32 id;
 774        int ret;
 775
 776        /*
 777         * tw9910 only use 8 or 16 bit bus width
 778         */
 779        if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
 780            SOCAM_DATAWIDTH_8  != priv->info->buswidth) {
 781                dev_err(&client->dev, "bus width error\n");
 782                return -ENODEV;
 783        }
 784
 785        ret = tw9910_s_power(&priv->subdev, 1);
 786        if (ret < 0)
 787                return ret;
 788
 789        /*
 790         * check and show Product ID
 791         * So far only revisions 0 and 1 have been seen
 792         */
 793        id = i2c_smbus_read_byte_data(client, ID);
 794        priv->revision = GET_REV(id);
 795        id = GET_ID(id);
 796
 797        if (0x0B != id ||
 798            0x01 < priv->revision) {
 799                dev_err(&client->dev,
 800                        "Product ID error %x:%x\n",
 801                        id, priv->revision);
 802                ret = -ENODEV;
 803                goto done;
 804        }
 805
 806        dev_info(&client->dev,
 807                 "tw9910 Product ID %0x:%0x\n", id, priv->revision);
 808
 809        priv->norm = V4L2_STD_NTSC;
 810
 811done:
 812        tw9910_s_power(&priv->subdev, 0);
 813        return ret;
 814}
 815
 816static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
 817#ifdef CONFIG_VIDEO_ADV_DEBUG
 818        .g_register     = tw9910_g_register,
 819        .s_register     = tw9910_s_register,
 820#endif
 821        .s_power        = tw9910_s_power,
 822};
 823
 824static int tw9910_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 825                           u32 *code)
 826{
 827        if (index)
 828                return -EINVAL;
 829
 830        *code = MEDIA_BUS_FMT_UYVY8_2X8;
 831        return 0;
 832}
 833
 834static int tw9910_g_mbus_config(struct v4l2_subdev *sd,
 835                                struct v4l2_mbus_config *cfg)
 836{
 837        struct i2c_client *client = v4l2_get_subdevdata(sd);
 838        struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 839
 840        cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
 841                V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
 842                V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
 843                V4L2_MBUS_DATA_ACTIVE_HIGH;
 844        cfg->type = V4L2_MBUS_PARALLEL;
 845        cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
 846
 847        return 0;
 848}
 849
 850static int tw9910_s_mbus_config(struct v4l2_subdev *sd,
 851                                const struct v4l2_mbus_config *cfg)
 852{
 853        struct i2c_client *client = v4l2_get_subdevdata(sd);
 854        struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
 855        u8 val = VSSL_VVALID | HSSL_DVALID;
 856        unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
 857
 858        /*
 859         * set OUTCTR1
 860         *
 861         * We use VVALID and DVALID signals to control VSYNC and HSYNC
 862         * outputs, in this mode their polarity is inverted.
 863         */
 864        if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
 865                val |= HSP_HI;
 866
 867        if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
 868                val |= VSP_HI;
 869
 870        return i2c_smbus_write_byte_data(client, OUTCTR1, val);
 871}
 872
 873static int tw9910_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
 874{
 875        *norm = V4L2_STD_NTSC | V4L2_STD_PAL;
 876        return 0;
 877}
 878
 879static struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
 880        .s_std          = tw9910_s_std,
 881        .g_std          = tw9910_g_std,
 882        .s_stream       = tw9910_s_stream,
 883        .g_mbus_fmt     = tw9910_g_fmt,
 884        .s_mbus_fmt     = tw9910_s_fmt,
 885        .try_mbus_fmt   = tw9910_try_fmt,
 886        .cropcap        = tw9910_cropcap,
 887        .g_crop         = tw9910_g_crop,
 888        .enum_mbus_fmt  = tw9910_enum_fmt,
 889        .g_mbus_config  = tw9910_g_mbus_config,
 890        .s_mbus_config  = tw9910_s_mbus_config,
 891        .g_tvnorms      = tw9910_g_tvnorms,
 892};
 893
 894static struct v4l2_subdev_ops tw9910_subdev_ops = {
 895        .core   = &tw9910_subdev_core_ops,
 896        .video  = &tw9910_subdev_video_ops,
 897};
 898
 899/*
 900 * i2c_driver function
 901 */
 902
 903static int tw9910_probe(struct i2c_client *client,
 904                        const struct i2c_device_id *did)
 905
 906{
 907        struct tw9910_priv              *priv;
 908        struct tw9910_video_info        *info;
 909        struct i2c_adapter              *adapter =
 910                to_i2c_adapter(client->dev.parent);
 911        struct soc_camera_subdev_desc   *ssdd = soc_camera_i2c_to_desc(client);
 912        int ret;
 913
 914        if (!ssdd || !ssdd->drv_priv) {
 915                dev_err(&client->dev, "TW9910: missing platform data!\n");
 916                return -EINVAL;
 917        }
 918
 919        info = ssdd->drv_priv;
 920
 921        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 922                dev_err(&client->dev,
 923                        "I2C-Adapter doesn't support "
 924                        "I2C_FUNC_SMBUS_BYTE_DATA\n");
 925                return -EIO;
 926        }
 927
 928        priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
 929        if (!priv)
 930                return -ENOMEM;
 931
 932        priv->info   = info;
 933
 934        v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
 935
 936        priv->clk = v4l2_clk_get(&client->dev, "mclk");
 937        if (IS_ERR(priv->clk))
 938                return PTR_ERR(priv->clk);
 939
 940        ret = tw9910_video_probe(client);
 941        if (ret < 0)
 942                v4l2_clk_put(priv->clk);
 943
 944        return ret;
 945}
 946
 947static int tw9910_remove(struct i2c_client *client)
 948{
 949        struct tw9910_priv *priv = to_tw9910(client);
 950        v4l2_clk_put(priv->clk);
 951        return 0;
 952}
 953
 954static const struct i2c_device_id tw9910_id[] = {
 955        { "tw9910", 0 },
 956        { }
 957};
 958MODULE_DEVICE_TABLE(i2c, tw9910_id);
 959
 960static struct i2c_driver tw9910_i2c_driver = {
 961        .driver = {
 962                .name = "tw9910",
 963        },
 964        .probe    = tw9910_probe,
 965        .remove   = tw9910_remove,
 966        .id_table = tw9910_id,
 967};
 968
 969module_i2c_driver(tw9910_i2c_driver);
 970
 971MODULE_DESCRIPTION("SoC Camera driver for tw9910");
 972MODULE_AUTHOR("Kuninori Morimoto");
 973MODULE_LICENSE("GPL v2");
 974