linux/drivers/media/i2c/tw9910.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * tw9910 Video Driver
   4 *
   5 * Copyright (C) 2017 Jacopo Mondi <jacopo+renesas@jmondi.org>
   6 *
   7 * Copyright (C) 2008 Renesas Solutions Corp.
   8 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
   9 *
  10 * Based on ov772x driver,
  11 *
  12 * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
  13 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
  14 * Copyright (C) 2008 Magnus Damm
  15 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
  16 */
  17
  18#include <linux/clk.h>
  19#include <linux/delay.h>
  20#include <linux/gpio/consumer.h>
  21#include <linux/i2c.h>
  22#include <linux/init.h>
  23#include <linux/kernel.h>
  24#include <linux/module.h>
  25#include <linux/slab.h>
  26#include <linux/v4l2-mediabus.h>
  27#include <linux/videodev2.h>
  28
  29#include <media/i2c/tw9910.h>
  30#include <media/v4l2-subdev.h>
  31
  32#define GET_ID(val)  ((val & 0xF8) >> 3)
  33#define GET_REV(val) (val & 0x07)
  34
  35/*
  36 * register offset
  37 */
  38#define ID              0x00 /* Product ID Code Register */
  39#define STATUS1         0x01 /* Chip Status Register I */
  40#define INFORM          0x02 /* Input Format */
  41#define OPFORM          0x03 /* Output Format Control Register */
  42#define DLYCTR          0x04 /* Hysteresis and HSYNC Delay Control */
  43#define OUTCTR1         0x05 /* Output Control I */
  44#define ACNTL1          0x06 /* Analog Control Register 1 */
  45#define CROP_HI         0x07 /* Cropping Register, High */
  46#define VDELAY_LO       0x08 /* Vertical Delay Register, Low */
  47#define VACTIVE_LO      0x09 /* Vertical Active Register, Low */
  48#define HDELAY_LO       0x0A /* Horizontal Delay Register, Low */
  49#define HACTIVE_LO      0x0B /* Horizontal Active Register, Low */
  50#define CNTRL1          0x0C /* Control Register I */
  51#define VSCALE_LO       0x0D /* Vertical Scaling Register, Low */
  52#define SCALE_HI        0x0E /* Scaling Register, High */
  53#define HSCALE_LO       0x0F /* Horizontal Scaling Register, Low */
  54#define BRIGHT          0x10 /* BRIGHTNESS Control Register */
  55#define CONTRAST        0x11 /* CONTRAST Control Register */
  56#define SHARPNESS       0x12 /* SHARPNESS Control Register I */
  57#define SAT_U           0x13 /* Chroma (U) Gain Register */
  58#define SAT_V           0x14 /* Chroma (V) Gain Register */
  59#define HUE             0x15 /* Hue Control Register */
  60#define CORING1         0x17
  61#define CORING2         0x18 /* Coring and IF compensation */
  62#define VBICNTL         0x19 /* VBI Control Register */
  63#define ACNTL2          0x1A /* Analog Control 2 */
  64#define OUTCTR2         0x1B /* Output Control 2 */
  65#define SDT             0x1C /* Standard Selection */
  66#define SDTR            0x1D /* Standard Recognition */
  67#define TEST            0x1F /* Test Control Register */
  68#define CLMPG           0x20 /* Clamping Gain */
  69#define IAGC            0x21 /* Individual AGC Gain */
  70#define AGCGAIN         0x22 /* AGC Gain */
  71#define PEAKWT          0x23 /* White Peak Threshold */
  72#define CLMPL           0x24 /* Clamp level */
  73#define SYNCT           0x25 /* Sync Amplitude */
  74#define MISSCNT         0x26 /* Sync Miss Count Register */
  75#define PCLAMP          0x27 /* Clamp Position Register */
  76#define VCNTL1          0x28 /* Vertical Control I */
  77#define VCNTL2          0x29 /* Vertical Control II */
  78#define CKILL           0x2A /* Color Killer Level Control */
  79#define COMB            0x2B /* Comb Filter Control */
  80#define LDLY            0x2C /* Luma Delay and H Filter Control */
  81#define MISC1           0x2D /* Miscellaneous Control I */
  82#define LOOP            0x2E /* LOOP Control Register */
  83#define MISC2           0x2F /* Miscellaneous Control II */
  84#define MVSN            0x30 /* Macrovision Detection */
  85#define STATUS2         0x31 /* Chip STATUS II */
  86#define HFREF           0x32 /* H monitor */
  87#define CLMD            0x33 /* CLAMP MODE */
  88#define IDCNTL          0x34 /* ID Detection Control */
  89#define CLCNTL1         0x35 /* Clamp Control I */
  90#define ANAPLLCTL       0x4C
  91#define VBIMIN          0x4D
  92#define HSLOWCTL        0x4E
  93#define WSS3            0x4F
  94#define FILLDATA        0x50
  95#define SDID            0x51
  96#define DID             0x52
  97#define WSS1            0x53
  98#define WSS2            0x54
  99#define VVBI            0x55
 100#define LCTL6           0x56
 101#define LCTL7           0x57
 102#define LCTL8           0x58
 103#define LCTL9           0x59
 104#define LCTL10          0x5A
 105#define LCTL11          0x5B
 106#define LCTL12          0x5C
 107#define LCTL13          0x5D
 108#define LCTL14          0x5E
 109#define LCTL15          0x5F
 110#define LCTL16          0x60
 111#define LCTL17          0x61
 112#define LCTL18          0x62
 113#define LCTL19          0x63
 114#define LCTL20          0x64
 115#define LCTL21          0x65
 116#define LCTL22          0x66
 117#define LCTL23          0x67
 118#define LCTL24          0x68
 119#define LCTL25          0x69
 120#define LCTL26          0x6A
 121#define HSBEGIN         0x6B
 122#define HSEND           0x6C
 123#define OVSDLY          0x6D
 124#define OVSEND          0x6E
 125#define VBIDELAY        0x6F
 126
 127/*
 128 * register detail
 129 */
 130
 131/* INFORM */
 132#define FC27_ON     0x40 /* 1 : Input crystal clock frequency is 27MHz */
 133#define FC27_FF     0x00 /* 0 : Square pixel mode. */
 134                         /*     Must use 24.54MHz for 60Hz field rate */
 135                         /*     source or 29.5MHz for 50Hz field rate */
 136#define IFSEL_S     0x10 /* 01 : S-video decoding */
 137#define IFSEL_C     0x00 /* 00 : Composite video decoding */
 138                         /* Y input video selection */
 139#define YSEL_M0     0x00 /*  00 : Mux0 selected */
 140#define YSEL_M1     0x04 /*  01 : Mux1 selected */
 141#define YSEL_M2     0x08 /*  10 : Mux2 selected */
 142#define YSEL_M3     0x10 /*  11 : Mux3 selected */
 143
 144/* OPFORM */
 145#define MODE        0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
 146                         /* 1 : ITU-R-656 compatible data sequence format */
 147#define LEN         0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
 148                         /* 1 : 16-bit YCrCb 4:2:2 output format.*/
 149#define LLCMODE     0x20 /* 1 : LLC output mode. */
 150                         /* 0 : free-run output mode */
 151#define AINC        0x10 /* Serial interface auto-indexing control */
 152                         /* 0 : auto-increment */
 153                         /* 1 : non-auto */
 154#define VSCTL       0x08 /* 1 : Vertical out ctrl by DVALID */
 155                         /* 0 : Vertical out ctrl by HACTIVE and DVALID */
 156#define OEN_TRI_SEL_MASK        0x07
 157#define OEN_TRI_SEL_ALL_ON      0x00 /* Enable output for Rev0/Rev1 */
 158#define OEN_TRI_SEL_ALL_OFF_r0  0x06 /* All tri-stated for Rev0 */
 159#define OEN_TRI_SEL_ALL_OFF_r1  0x07 /* All tri-stated for Rev1 */
 160
 161/* OUTCTR1 */
 162#define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */
 163#define VSP_HI      0x80 /* 1 : VS pin output polarity is active high. */
 164                         /* VS pin output control */
 165#define VSSL_VSYNC  0x00 /*   0 : VSYNC  */
 166#define VSSL_VACT   0x10 /*   1 : VACT   */
 167#define VSSL_FIELD  0x20 /*   2 : FIELD  */
 168#define VSSL_VVALID 0x30 /*   3 : VVALID */
 169#define VSSL_ZERO   0x70 /*   7 : 0      */
 170#define HSP_LOW     0x00 /* 0 : HS pin output polarity is active low */
 171#define HSP_HI      0x08 /* 1 : HS pin output polarity is active high.*/
 172                         /* HS pin output control */
 173#define HSSL_HACT   0x00 /*   0 : HACT   */
 174#define HSSL_HSYNC  0x01 /*   1 : HSYNC  */
 175#define HSSL_DVALID 0x02 /*   2 : DVALID */
 176#define HSSL_HLOCK  0x03 /*   3 : HLOCK  */
 177#define HSSL_ASYNCW 0x04 /*   4 : ASYNCW */
 178#define HSSL_ZERO   0x07 /*   7 : 0      */
 179
 180/* ACNTL1 */
 181#define SRESET      0x80 /* resets the device to its default state
 182                          * but all register content remain unchanged.
 183                          * This bit is self-resetting.
 184                          */
 185#define ACNTL1_PDN_MASK 0x0e
 186#define CLK_PDN         0x08 /* system clock power down */
 187#define Y_PDN           0x04 /* Luma ADC power down */
 188#define C_PDN           0x02 /* Chroma ADC power down */
 189
 190/* ACNTL2 */
 191#define ACNTL2_PDN_MASK 0x40
 192#define PLL_PDN         0x40 /* PLL power down */
 193
 194/* VBICNTL */
 195
 196/* RTSEL : control the real time signal output from the MPOUT pin */
 197#define RTSEL_MASK  0x07
 198#define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
 199#define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
 200#define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
 201#define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
 202#define RTSEL_MONO  0x04 /* 0100 = MONO */
 203#define RTSEL_DET50 0x05 /* 0101 = DET50 */
 204#define RTSEL_FIELD 0x06 /* 0110 = FIELD */
 205#define RTSEL_RTCO  0x07 /* 0111 = RTCO ( Real Time Control ) */
 206
 207/* HSYNC start and end are constant for now */
 208#define HSYNC_START     0x0260
 209#define HSYNC_END       0x0300
 210
 211/*
 212 * structure
 213 */
 214
 215struct regval_list {
 216        unsigned char reg_num;
 217        unsigned char value;
 218};
 219
 220struct tw9910_scale_ctrl {
 221        char           *name;
 222        unsigned short  width;
 223        unsigned short  height;
 224        u16             hscale;
 225        u16             vscale;
 226};
 227
 228struct tw9910_priv {
 229        struct v4l2_subdev              subdev;
 230        struct clk                      *clk;
 231        struct tw9910_video_info        *info;
 232        struct gpio_desc                *pdn_gpio;
 233        struct gpio_desc                *rstb_gpio;
 234        const struct tw9910_scale_ctrl  *scale;
 235        v4l2_std_id                     norm;
 236        u32                             revision;
 237};
 238
 239static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
 240        {
 241                .name   = "NTSC SQ",
 242                .width  = 640,
 243                .height = 480,
 244                .hscale = 0x0100,
 245                .vscale = 0x0100,
 246        },
 247        {
 248                .name   = "NTSC CCIR601",
 249                .width  = 720,
 250                .height = 480,
 251                .hscale = 0x0100,
 252                .vscale = 0x0100,
 253        },
 254        {
 255                .name   = "NTSC SQ (CIF)",
 256                .width  = 320,
 257                .height = 240,
 258                .hscale = 0x0200,
 259                .vscale = 0x0200,
 260        },
 261        {
 262                .name   = "NTSC CCIR601 (CIF)",
 263                .width  = 360,
 264                .height = 240,
 265                .hscale = 0x0200,
 266                .vscale = 0x0200,
 267        },
 268        {
 269                .name   = "NTSC SQ (QCIF)",
 270                .width  = 160,
 271                .height = 120,
 272                .hscale = 0x0400,
 273                .vscale = 0x0400,
 274        },
 275        {
 276                .name   = "NTSC CCIR601 (QCIF)",
 277                .width  = 180,
 278                .height = 120,
 279                .hscale = 0x0400,
 280                .vscale = 0x0400,
 281        },
 282};
 283
 284static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
 285        {
 286                .name   = "PAL SQ",
 287                .width  = 768,
 288                .height = 576,
 289                .hscale = 0x0100,
 290                .vscale = 0x0100,
 291        },
 292        {
 293                .name   = "PAL CCIR601",
 294                .width  = 720,
 295                .height = 576,
 296                .hscale = 0x0100,
 297                .vscale = 0x0100,
 298        },
 299        {
 300                .name   = "PAL SQ (CIF)",
 301                .width  = 384,
 302                .height = 288,
 303                .hscale = 0x0200,
 304                .vscale = 0x0200,
 305        },
 306        {
 307                .name   = "PAL CCIR601 (CIF)",
 308                .width  = 360,
 309                .height = 288,
 310                .hscale = 0x0200,
 311                .vscale = 0x0200,
 312        },
 313        {
 314                .name   = "PAL SQ (QCIF)",
 315                .width  = 192,
 316                .height = 144,
 317                .hscale = 0x0400,
 318                .vscale = 0x0400,
 319        },
 320        {
 321                .name   = "PAL CCIR601 (QCIF)",
 322                .width  = 180,
 323                .height = 144,
 324                .hscale = 0x0400,
 325                .vscale = 0x0400,
 326        },
 327};
 328
 329/*
 330 * general function
 331 */
 332static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
 333{
 334        return container_of(i2c_get_clientdata(client), struct tw9910_priv,
 335                            subdev);
 336}
 337
 338static int tw9910_mask_set(struct i2c_client *client, u8 command,
 339                           u8 mask, u8 set)
 340{
 341        s32 val = i2c_smbus_read_byte_data(client, command);
 342
 343        if (val < 0)
 344                return val;
 345
 346        val &= ~mask;
 347        val |= set & mask;
 348
 349        return i2c_smbus_write_byte_data(client, command, val);
 350}
 351
 352static int tw9910_set_scale(struct i2c_client *client,
 353                            const struct tw9910_scale_ctrl *scale)
 354{
 355        int ret;
 356
 357        ret = i2c_smbus_write_byte_data(client, SCALE_HI,
 358                                        (scale->vscale & 0x0F00) >> 4 |
 359                                        (scale->hscale & 0x0F00) >> 8);
 360        if (ret < 0)
 361                return ret;
 362
 363        ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
 364                                        scale->hscale & 0x00FF);
 365        if (ret < 0)
 366                return ret;
 367
 368        ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
 369                                        scale->vscale & 0x00FF);
 370
 371        return ret;
 372}
 373
 374static int tw9910_set_hsync(struct i2c_client *client)
 375{
 376        struct tw9910_priv *priv = to_tw9910(client);
 377        int ret;
 378
 379        /* bit 10 - 3 */
 380        ret = i2c_smbus_write_byte_data(client, HSBEGIN,
 381                                        (HSYNC_START & 0x07F8) >> 3);
 382        if (ret < 0)
 383                return ret;
 384
 385        /* bit 10 - 3 */
 386        ret = i2c_smbus_write_byte_data(client, HSEND,
 387                                        (HSYNC_END & 0x07F8) >> 3);
 388        if (ret < 0)
 389                return ret;
 390
 391        /* So far only revisions 0 and 1 have been seen. */
 392        /* bit 2 - 0 */
 393        if (priv->revision == 1)
 394                ret = tw9910_mask_set(client, HSLOWCTL, 0x77,
 395                                      (HSYNC_START & 0x0007) << 4 |
 396                                      (HSYNC_END   & 0x0007));
 397
 398        return ret;
 399}
 400
 401static void tw9910_reset(struct i2c_client *client)
 402{
 403        tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
 404        usleep_range(1000, 5000);
 405}
 406
 407static int tw9910_power(struct i2c_client *client, int enable)
 408{
 409        int ret;
 410        u8 acntl1;
 411        u8 acntl2;
 412
 413        if (enable) {
 414                acntl1 = 0;
 415                acntl2 = 0;
 416        } else {
 417                acntl1 = CLK_PDN | Y_PDN | C_PDN;
 418                acntl2 = PLL_PDN;
 419        }
 420
 421        ret = tw9910_mask_set(client, ACNTL1, ACNTL1_PDN_MASK, acntl1);
 422        if (ret < 0)
 423                return ret;
 424
 425        return tw9910_mask_set(client, ACNTL2, ACNTL2_PDN_MASK, acntl2);
 426}
 427
 428static const struct tw9910_scale_ctrl *tw9910_select_norm(v4l2_std_id norm,
 429                                                          u32 width, u32 height)
 430{
 431        const struct tw9910_scale_ctrl *scale;
 432        const struct tw9910_scale_ctrl *ret = NULL;
 433        __u32 diff = 0xffffffff, tmp;
 434        int size, i;
 435
 436        if (norm & V4L2_STD_NTSC) {
 437                scale = tw9910_ntsc_scales;
 438                size = ARRAY_SIZE(tw9910_ntsc_scales);
 439        } else if (norm & V4L2_STD_PAL) {
 440                scale = tw9910_pal_scales;
 441                size = ARRAY_SIZE(tw9910_pal_scales);
 442        } else {
 443                return NULL;
 444        }
 445
 446        for (i = 0; i < size; i++) {
 447                tmp = abs(width - scale[i].width) +
 448                      abs(height - scale[i].height);
 449                if (tmp < diff) {
 450                        diff = tmp;
 451                        ret = scale + i;
 452                }
 453        }
 454
 455        return ret;
 456}
 457
 458/*
 459 * subdevice operations
 460 */
 461static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
 462{
 463        struct i2c_client *client = v4l2_get_subdevdata(sd);
 464        struct tw9910_priv *priv = to_tw9910(client);
 465        u8 val;
 466        int ret;
 467
 468        if (!enable) {
 469                switch (priv->revision) {
 470                case 0:
 471                        val = OEN_TRI_SEL_ALL_OFF_r0;
 472                        break;
 473                case 1:
 474                        val = OEN_TRI_SEL_ALL_OFF_r1;
 475                        break;
 476                default:
 477                        dev_err(&client->dev, "un-supported revision\n");
 478                        return -EINVAL;
 479                }
 480        } else {
 481                val = OEN_TRI_SEL_ALL_ON;
 482
 483                if (!priv->scale) {
 484                        dev_err(&client->dev, "norm select error\n");
 485                        return -EPERM;
 486                }
 487
 488                dev_dbg(&client->dev, "%s %dx%d\n",
 489                        priv->scale->name,
 490                        priv->scale->width,
 491                        priv->scale->height);
 492        }
 493
 494        ret = tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
 495        if (ret < 0)
 496                return ret;
 497
 498        return tw9910_power(client, enable);
 499}
 500
 501static int tw9910_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
 502{
 503        struct i2c_client *client = v4l2_get_subdevdata(sd);
 504        struct tw9910_priv *priv = to_tw9910(client);
 505
 506        *norm = priv->norm;
 507
 508        return 0;
 509}
 510
 511static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 512{
 513        struct i2c_client *client = v4l2_get_subdevdata(sd);
 514        struct tw9910_priv *priv = to_tw9910(client);
 515        const unsigned int hact = 720;
 516        const unsigned int hdelay = 15;
 517        unsigned int vact;
 518        unsigned int vdelay;
 519        int ret;
 520
 521        if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
 522                return -EINVAL;
 523
 524        priv->norm = norm;
 525        if (norm & V4L2_STD_525_60) {
 526                vact = 240;
 527                vdelay = 18;
 528                ret = tw9910_mask_set(client, VVBI, 0x10, 0x10);
 529        } else {
 530                vact = 288;
 531                vdelay = 24;
 532                ret = tw9910_mask_set(client, VVBI, 0x10, 0x00);
 533        }
 534        if (!ret)
 535                ret = i2c_smbus_write_byte_data(client, CROP_HI,
 536                                                ((vdelay >> 2) & 0xc0)  |
 537                                                ((vact >> 4) & 0x30)    |
 538                                                ((hdelay >> 6) & 0x0c)  |
 539                                                ((hact >> 8) & 0x03));
 540        if (!ret)
 541                ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
 542                                                vdelay & 0xff);
 543        if (!ret)
 544                ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
 545                                                vact & 0xff);
 546
 547        return ret;
 548}
 549
 550#ifdef CONFIG_VIDEO_ADV_DEBUG
 551static int tw9910_g_register(struct v4l2_subdev *sd,
 552                             struct v4l2_dbg_register *reg)
 553{
 554        struct i2c_client *client = v4l2_get_subdevdata(sd);
 555        int ret;
 556
 557        if (reg->reg > 0xff)
 558                return -EINVAL;
 559
 560        reg->size = 1;
 561        ret = i2c_smbus_read_byte_data(client, reg->reg);
 562        if (ret < 0)
 563                return ret;
 564
 565        /*
 566         * ret      = int
 567         * reg->val = __u64
 568         */
 569        reg->val = (__u64)ret;
 570
 571        return 0;
 572}
 573
 574static int tw9910_s_register(struct v4l2_subdev *sd,
 575                             const struct v4l2_dbg_register *reg)
 576{
 577        struct i2c_client *client = v4l2_get_subdevdata(sd);
 578
 579        if (reg->reg > 0xff ||
 580            reg->val > 0xff)
 581                return -EINVAL;
 582
 583        return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
 584}
 585#endif
 586
 587static int tw9910_power_on(struct tw9910_priv *priv)
 588{
 589        struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
 590        int ret;
 591
 592        if (priv->clk) {
 593                ret = clk_prepare_enable(priv->clk);
 594                if (ret)
 595                        return ret;
 596        }
 597
 598        if (priv->pdn_gpio) {
 599                gpiod_set_value(priv->pdn_gpio, 0);
 600                usleep_range(500, 1000);
 601        }
 602
 603        /*
 604         * FIXME: The reset signal is connected to a shared GPIO on some
 605         * platforms (namely the SuperH Migo-R). Until a framework becomes
 606         * available to handle this cleanly, request the GPIO temporarily
 607         * to avoid conflicts.
 608         */
 609        priv->rstb_gpio = gpiod_get_optional(&client->dev, "rstb",
 610                                             GPIOD_OUT_LOW);
 611        if (IS_ERR(priv->rstb_gpio)) {
 612                dev_info(&client->dev, "Unable to get GPIO \"rstb\"");
 613                return PTR_ERR(priv->rstb_gpio);
 614        }
 615
 616        if (priv->rstb_gpio) {
 617                gpiod_set_value(priv->rstb_gpio, 1);
 618                usleep_range(500, 1000);
 619                gpiod_set_value(priv->rstb_gpio, 0);
 620                usleep_range(500, 1000);
 621
 622                gpiod_put(priv->rstb_gpio);
 623        }
 624
 625        return 0;
 626}
 627
 628static int tw9910_power_off(struct tw9910_priv *priv)
 629{
 630        clk_disable_unprepare(priv->clk);
 631
 632        if (priv->pdn_gpio) {
 633                gpiod_set_value(priv->pdn_gpio, 1);
 634                usleep_range(500, 1000);
 635        }
 636
 637        return 0;
 638}
 639
 640static int tw9910_s_power(struct v4l2_subdev *sd, int on)
 641{
 642        struct i2c_client *client = v4l2_get_subdevdata(sd);
 643        struct tw9910_priv *priv = to_tw9910(client);
 644
 645        return on ? tw9910_power_on(priv) : tw9910_power_off(priv);
 646}
 647
 648static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
 649{
 650        struct i2c_client *client = v4l2_get_subdevdata(sd);
 651        struct tw9910_priv *priv = to_tw9910(client);
 652        int ret = -EINVAL;
 653        u8 val;
 654
 655        /* Select suitable norm. */
 656        priv->scale = tw9910_select_norm(priv->norm, *width, *height);
 657        if (!priv->scale)
 658                goto tw9910_set_fmt_error;
 659
 660        /* Reset hardware. */
 661        tw9910_reset(client);
 662
 663        /* Set bus width. */
 664        val = 0x00;
 665        if (priv->info->buswidth == 16)
 666                val = LEN;
 667
 668        ret = tw9910_mask_set(client, OPFORM, LEN, val);
 669        if (ret < 0)
 670                goto tw9910_set_fmt_error;
 671
 672        /* Select MPOUT behavior. */
 673        switch (priv->info->mpout) {
 674        case TW9910_MPO_VLOSS:
 675                val = RTSEL_VLOSS; break;
 676        case TW9910_MPO_HLOCK:
 677                val = RTSEL_HLOCK; break;
 678        case TW9910_MPO_SLOCK:
 679                val = RTSEL_SLOCK; break;
 680        case TW9910_MPO_VLOCK:
 681                val = RTSEL_VLOCK; break;
 682        case TW9910_MPO_MONO:
 683                val = RTSEL_MONO;  break;
 684        case TW9910_MPO_DET50:
 685                val = RTSEL_DET50; break;
 686        case TW9910_MPO_FIELD:
 687                val = RTSEL_FIELD; break;
 688        case TW9910_MPO_RTCO:
 689                val = RTSEL_RTCO;  break;
 690        default:
 691                val = 0;
 692        }
 693
 694        ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
 695        if (ret < 0)
 696                goto tw9910_set_fmt_error;
 697
 698        /* Set scale. */
 699        ret = tw9910_set_scale(client, priv->scale);
 700        if (ret < 0)
 701                goto tw9910_set_fmt_error;
 702
 703        /* Set hsync. */
 704        ret = tw9910_set_hsync(client);
 705        if (ret < 0)
 706                goto tw9910_set_fmt_error;
 707
 708        *width = priv->scale->width;
 709        *height = priv->scale->height;
 710
 711        return ret;
 712
 713tw9910_set_fmt_error:
 714
 715        tw9910_reset(client);
 716        priv->scale = NULL;
 717
 718        return ret;
 719}
 720
 721static int tw9910_get_selection(struct v4l2_subdev *sd,
 722                                struct v4l2_subdev_pad_config *cfg,
 723                                struct v4l2_subdev_selection *sel)
 724{
 725        struct i2c_client *client = v4l2_get_subdevdata(sd);
 726        struct tw9910_priv *priv = to_tw9910(client);
 727
 728        if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 729                return -EINVAL;
 730        /* Only CROP, CROP_DEFAULT and CROP_BOUNDS are supported. */
 731        if (sel->target > V4L2_SEL_TGT_CROP_BOUNDS)
 732                return -EINVAL;
 733
 734        sel->r.left     = 0;
 735        sel->r.top      = 0;
 736        if (priv->norm & V4L2_STD_NTSC) {
 737                sel->r.width    = 640;
 738                sel->r.height   = 480;
 739        } else {
 740                sel->r.width    = 768;
 741                sel->r.height   = 576;
 742        }
 743
 744        return 0;
 745}
 746
 747static int tw9910_get_fmt(struct v4l2_subdev *sd,
 748                          struct v4l2_subdev_pad_config *cfg,
 749                          struct v4l2_subdev_format *format)
 750{
 751        struct v4l2_mbus_framefmt *mf = &format->format;
 752        struct i2c_client *client = v4l2_get_subdevdata(sd);
 753        struct tw9910_priv *priv = to_tw9910(client);
 754
 755        if (format->pad)
 756                return -EINVAL;
 757
 758        if (!priv->scale) {
 759                priv->scale = tw9910_select_norm(priv->norm, 640, 480);
 760                if (!priv->scale)
 761                        return -EINVAL;
 762        }
 763
 764        mf->width       = priv->scale->width;
 765        mf->height      = priv->scale->height;
 766        mf->code        = MEDIA_BUS_FMT_UYVY8_2X8;
 767        mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 768        mf->field       = V4L2_FIELD_INTERLACED_BT;
 769
 770        return 0;
 771}
 772
 773static int tw9910_s_fmt(struct v4l2_subdev *sd,
 774                        struct v4l2_mbus_framefmt *mf)
 775{
 776        u32 width = mf->width, height = mf->height;
 777        int ret;
 778
 779        WARN_ON(mf->field != V4L2_FIELD_ANY &&
 780                mf->field != V4L2_FIELD_INTERLACED_BT);
 781
 782        /* Check color format. */
 783        if (mf->code != MEDIA_BUS_FMT_UYVY8_2X8)
 784                return -EINVAL;
 785
 786        mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
 787
 788        ret = tw9910_set_frame(sd, &width, &height);
 789        if (ret)
 790                return ret;
 791
 792        mf->width       = width;
 793        mf->height      = height;
 794
 795        return 0;
 796}
 797
 798static int tw9910_set_fmt(struct v4l2_subdev *sd,
 799                          struct v4l2_subdev_pad_config *cfg,
 800                          struct v4l2_subdev_format *format)
 801{
 802        struct v4l2_mbus_framefmt *mf = &format->format;
 803        struct i2c_client *client = v4l2_get_subdevdata(sd);
 804        struct tw9910_priv *priv = to_tw9910(client);
 805        const struct tw9910_scale_ctrl *scale;
 806
 807        if (format->pad)
 808                return -EINVAL;
 809
 810        if (mf->field == V4L2_FIELD_ANY) {
 811                mf->field = V4L2_FIELD_INTERLACED_BT;
 812        } else if (mf->field != V4L2_FIELD_INTERLACED_BT) {
 813                dev_err(&client->dev, "Field type %d invalid\n", mf->field);
 814                return -EINVAL;
 815        }
 816
 817        mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 818        mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
 819
 820        /* Select suitable norm. */
 821        scale = tw9910_select_norm(priv->norm, mf->width, mf->height);
 822        if (!scale)
 823                return -EINVAL;
 824
 825        mf->width       = scale->width;
 826        mf->height      = scale->height;
 827
 828        if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 829                return tw9910_s_fmt(sd, mf);
 830
 831        cfg->try_fmt = *mf;
 832
 833        return 0;
 834}
 835
 836static int tw9910_video_probe(struct i2c_client *client)
 837{
 838        struct tw9910_priv *priv = to_tw9910(client);
 839        s32 id;
 840        int ret;
 841
 842        /* TW9910 only use 8 or 16 bit bus width. */
 843        if (priv->info->buswidth != 16 && priv->info->buswidth != 8) {
 844                dev_err(&client->dev, "bus width error\n");
 845                return -ENODEV;
 846        }
 847
 848        ret = tw9910_s_power(&priv->subdev, 1);
 849        if (ret < 0)
 850                return ret;
 851
 852        /*
 853         * Check and show Product ID.
 854         * So far only revisions 0 and 1 have been seen.
 855         */
 856        id = i2c_smbus_read_byte_data(client, ID);
 857        priv->revision = GET_REV(id);
 858        id = GET_ID(id);
 859
 860        if (id != 0x0b || priv->revision > 0x01) {
 861                dev_err(&client->dev, "Product ID error %x:%x\n",
 862                        id, priv->revision);
 863                ret = -ENODEV;
 864                goto done;
 865        }
 866
 867        dev_info(&client->dev, "tw9910 Product ID %0x:%0x\n",
 868                 id, priv->revision);
 869
 870        priv->norm = V4L2_STD_NTSC;
 871        priv->scale = &tw9910_ntsc_scales[0];
 872
 873done:
 874        tw9910_s_power(&priv->subdev, 0);
 875
 876        return ret;
 877}
 878
 879static const struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
 880#ifdef CONFIG_VIDEO_ADV_DEBUG
 881        .g_register     = tw9910_g_register,
 882        .s_register     = tw9910_s_register,
 883#endif
 884        .s_power        = tw9910_s_power,
 885};
 886
 887static int tw9910_enum_mbus_code(struct v4l2_subdev *sd,
 888                                 struct v4l2_subdev_pad_config *cfg,
 889                                 struct v4l2_subdev_mbus_code_enum *code)
 890{
 891        if (code->pad || code->index)
 892                return -EINVAL;
 893
 894        code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 895
 896        return 0;
 897}
 898
 899static int tw9910_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
 900{
 901        *norm = V4L2_STD_NTSC | V4L2_STD_PAL;
 902
 903        return 0;
 904}
 905
 906static const struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
 907        .s_std          = tw9910_s_std,
 908        .g_std          = tw9910_g_std,
 909        .s_stream       = tw9910_s_stream,
 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        int ret;
 939
 940        if (!client->dev.platform_data) {
 941                dev_err(&client->dev, "TW9910: missing platform data!\n");
 942                return -EINVAL;
 943        }
 944
 945        info = client->dev.platform_data;
 946
 947        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 948                dev_err(&client->dev,
 949                        "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE_DATA\n");
 950                return -EIO;
 951        }
 952
 953        priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
 954        if (!priv)
 955                return -ENOMEM;
 956
 957        priv->info = info;
 958
 959        v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
 960
 961        priv->clk = clk_get(&client->dev, "xti");
 962        if (PTR_ERR(priv->clk) == -ENOENT) {
 963                priv->clk = NULL;
 964        } else if (IS_ERR(priv->clk)) {
 965                dev_err(&client->dev, "Unable to get xti clock\n");
 966                return PTR_ERR(priv->clk);
 967        }
 968
 969        priv->pdn_gpio = gpiod_get_optional(&client->dev, "pdn",
 970                                            GPIOD_OUT_HIGH);
 971        if (IS_ERR(priv->pdn_gpio)) {
 972                dev_info(&client->dev, "Unable to get GPIO \"pdn\"");
 973                ret = PTR_ERR(priv->pdn_gpio);
 974                goto error_clk_put;
 975        }
 976
 977        ret = tw9910_video_probe(client);
 978        if (ret < 0)
 979                goto error_gpio_put;
 980
 981        ret = v4l2_async_register_subdev(&priv->subdev);
 982        if (ret)
 983                goto error_gpio_put;
 984
 985        return ret;
 986
 987error_gpio_put:
 988        if (priv->pdn_gpio)
 989                gpiod_put(priv->pdn_gpio);
 990error_clk_put:
 991        clk_put(priv->clk);
 992
 993        return ret;
 994}
 995
 996static int tw9910_remove(struct i2c_client *client)
 997{
 998        struct tw9910_priv *priv = to_tw9910(client);
 999
1000        if (priv->pdn_gpio)
1001                gpiod_put(priv->pdn_gpio);
1002        clk_put(priv->clk);
1003        v4l2_device_unregister_subdev(&priv->subdev);
1004
1005        return 0;
1006}
1007
1008static const struct i2c_device_id tw9910_id[] = {
1009        { "tw9910", 0 },
1010        { }
1011};
1012MODULE_DEVICE_TABLE(i2c, tw9910_id);
1013
1014static struct i2c_driver tw9910_i2c_driver = {
1015        .driver = {
1016                .name = "tw9910",
1017        },
1018        .probe    = tw9910_probe,
1019        .remove   = tw9910_remove,
1020        .id_table = tw9910_id,
1021};
1022
1023module_i2c_driver(tw9910_i2c_driver);
1024
1025MODULE_DESCRIPTION("V4L2 driver for TW9910 video decoder");
1026MODULE_AUTHOR("Kuninori Morimoto");
1027MODULE_LICENSE("GPL v2");
1028