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/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
 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        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
 549static 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
 572static 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
 585static 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
 594static 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
 671tw9910_set_fmt_error:
 672
 673        tw9910_reset(client);
 674        priv->scale = NULL;
 675
 676        return ret;
 677}
 678
 679static 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
 704static 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
 730static 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
 755static 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
 793static 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
 835done:
 836        tw9910_s_power(&priv->subdev, 0);
 837        return ret;
 838}
 839
 840static const 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
 848static 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
 859static 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
 875static 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
 898static 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
 904static const 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
 913static 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
 920static const 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
 930static 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
 973static 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
 980static const struct i2c_device_id tw9910_id[] = {
 981        { "tw9910", 0 },
 982        { }
 983};
 984MODULE_DEVICE_TABLE(i2c, tw9910_id);
 985
 986static 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
 995module_i2c_driver(tw9910_i2c_driver);
 996
 997MODULE_DESCRIPTION("SoC Camera driver for tw9910");
 998MODULE_AUTHOR("Kuninori Morimoto");
 999MODULE_LICENSE("GPL v2");
1000