drivers/media/video/ov9640.c

   1 /*
   2  * OmniVision OV96xx Camera Driver
   3  *
   4  * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
   5  *
   6  * Based on ov772x camera driver:
   7  *
   8  * Copyright (C) 2008 Renesas Solutions Corp.
   9  * Kuninori Morimoto <morimoto.kuninori@renesas.com>
  10  *
  11  * Based on ov7670 and soc_camera_platform driver,
  12  *
  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  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License version 2 as
  19  * published by the Free Software Foundation.
  20  */
  21
  22 #include <linux/init.h>
  23 #include <linux/module.h>
  24 #include <linux/i2c.h>
  25 #include <linux/slab.h>
  26 #include <linux/delay.h>
  27 #include <linux/v4l2-mediabus.h>
  28 #include <linux/videodev2.h>
  29
  30 #include <media/soc_camera.h>
  31 #include <media/v4l2-chip-ident.h>
  32 #include <media/v4l2-common.h>
  33 #include <media/v4l2-ctrls.h>
  34
  35 #include "ov9640.h"
  36
  37 #define to_ov9640_sensor(sd)    container_of(sd, struct ov9640_priv, subdev)
  38
  39 /* default register setup */
  40 static const struct ov9640_reg ov9640_regs_dflt[] = {
  41         { OV9640_COM5,  OV9640_COM5_SYSCLK | OV9640_COM5_LONGEXP },
  42         { OV9640_COM6,  OV9640_COM6_OPT_BLC | OV9640_COM6_ADBLC_BIAS |
  43                         OV9640_COM6_FMT_RST | OV9640_COM6_ADBLC_OPTEN },
  44         { OV9640_PSHFT, OV9640_PSHFT_VAL(0x01) },
  45         { OV9640_ACOM,  OV9640_ACOM_2X_ANALOG | OV9640_ACOM_RSVD },
  46         { OV9640_TSLB,  OV9640_TSLB_YUYV_UYVY },
  47         { OV9640_COM16, OV9640_COM16_RB_AVG },
  48
  49         /* Gamma curve P */
  50         { 0x6c, 0x40 }, { 0x6d, 0x30 }, { 0x6e, 0x4b }, { 0x6f, 0x60 },
  51         { 0x70, 0x70 }, { 0x71, 0x70 }, { 0x72, 0x70 }, { 0x73, 0x70 },
  52         { 0x74, 0x60 }, { 0x75, 0x60 }, { 0x76, 0x50 }, { 0x77, 0x48 },
  53         { 0x78, 0x3a }, { 0x79, 0x2e }, { 0x7a, 0x28 }, { 0x7b, 0x22 },
  54
  55         /* Gamma curve T */
  56         { 0x7c, 0x04 }, { 0x7d, 0x07 }, { 0x7e, 0x10 }, { 0x7f, 0x28 },
  57         { 0x80, 0x36 }, { 0x81, 0x44 }, { 0x82, 0x52 }, { 0x83, 0x60 },
  58         { 0x84, 0x6c }, { 0x85, 0x78 }, { 0x86, 0x8c }, { 0x87, 0x9e },
  59         { 0x88, 0xbb }, { 0x89, 0xd2 }, { 0x8a, 0xe6 },
  60 };
  61
  62 /* Configurations
  63  * NOTE: for YUV, alter the following registers:
  64  *              COM12 |= OV9640_COM12_YUV_AVG
  65  *
  66  *       for RGB, alter the following registers:
  67  *              COM7  |= OV9640_COM7_RGB
  68  *              COM13 |= OV9640_COM13_RGB_AVG
  69  *              COM15 |= proper RGB color encoding mode
  70  */
  71 static const struct ov9640_reg ov9640_regs_qqcif[] = {
  72         { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x0f) },
  73         { OV9640_COM1,  OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
  74         { OV9640_COM4,  OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
  75         { OV9640_COM7,  OV9640_COM7_QCIF },
  76         { OV9640_COM12, OV9640_COM12_RSVD },
  77         { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
  78         { OV9640_COM15, OV9640_COM15_OR_10F0 },
  79 };
  80
  81 static const struct ov9640_reg ov9640_regs_qqvga[] = {
  82         { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
  83         { OV9640_COM1,  OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
  84         { OV9640_COM4,  OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
  85         { OV9640_COM7,  OV9640_COM7_QVGA },
  86         { OV9640_COM12, OV9640_COM12_RSVD },
  87         { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
  88         { OV9640_COM15, OV9640_COM15_OR_10F0 },
  89 };
  90
  91 static const struct ov9640_reg ov9640_regs_qcif[] = {
  92         { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
  93         { OV9640_COM4,  OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
  94         { OV9640_COM7,  OV9640_COM7_QCIF },
  95         { OV9640_COM12, OV9640_COM12_RSVD },
  96         { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
  97         { OV9640_COM15, OV9640_COM15_OR_10F0 },
  98 };
  99
 100 static const struct ov9640_reg ov9640_regs_qvga[] = {
 101         { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
 102         { OV9640_COM4,  OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
 103         { OV9640_COM7,  OV9640_COM7_QVGA },
 104         { OV9640_COM12, OV9640_COM12_RSVD },
 105         { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
 106         { OV9640_COM15, OV9640_COM15_OR_10F0 },
 107 };
 108
 109 static const struct ov9640_reg ov9640_regs_cif[] = {
 110         { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
 111         { OV9640_COM3,  OV9640_COM3_VP },
 112         { OV9640_COM7,  OV9640_COM7_CIF },
 113         { OV9640_COM12, OV9640_COM12_RSVD },
 114         { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
 115         { OV9640_COM15, OV9640_COM15_OR_10F0 },
 116 };
 117
 118 static const struct ov9640_reg ov9640_regs_vga[] = {
 119         { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
 120         { OV9640_COM3,  OV9640_COM3_VP },
 121         { OV9640_COM7,  OV9640_COM7_VGA },
 122         { OV9640_COM12, OV9640_COM12_RSVD },
 123         { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
 124         { OV9640_COM15, OV9640_COM15_OR_10F0 },
 125 };
 126
 127 static const struct ov9640_reg ov9640_regs_sxga[] = {
 128         { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
 129         { OV9640_COM3,  OV9640_COM3_VP },
 130         { OV9640_COM7,  0 },
 131         { OV9640_COM12, OV9640_COM12_RSVD },
 132         { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
 133         { OV9640_COM15, OV9640_COM15_OR_10F0 },
 134 };
 135
 136 static const struct ov9640_reg ov9640_regs_yuv[] = {
 137         { OV9640_MTX1,  0x58 },
 138         { OV9640_MTX2,  0x48 },
 139         { OV9640_MTX3,  0x10 },
 140         { OV9640_MTX4,  0x28 },
 141         { OV9640_MTX5,  0x48 },
 142         { OV9640_MTX6,  0x70 },
 143         { OV9640_MTX7,  0x40 },
 144         { OV9640_MTX8,  0x40 },
 145         { OV9640_MTX9,  0x40 },
 146         { OV9640_MTXS,  0x0f },
 147 };
 148
 149 static const struct ov9640_reg ov9640_regs_rgb[] = {
 150         { OV9640_MTX1,  0x71 },
 151         { OV9640_MTX2,  0x3e },
 152         { OV9640_MTX3,  0x0c },
 153         { OV9640_MTX4,  0x33 },
 154         { OV9640_MTX5,  0x72 },
 155         { OV9640_MTX6,  0x00 },
 156         { OV9640_MTX7,  0x2b },
 157         { OV9640_MTX8,  0x66 },
 158         { OV9640_MTX9,  0xd2 },
 159         { OV9640_MTXS,  0x65 },
 160 };
 161
 162 static enum v4l2_mbus_pixelcode ov9640_codes[] = {
 163         V4L2_MBUS_FMT_UYVY8_2X8,
 164         V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE,
 165         V4L2_MBUS_FMT_RGB565_2X8_LE,
 166 };
 167
 168 /* read a register */
 169 static int ov9640_reg_read(struct i2c_client *client, u8 reg, u8 *val)
 170 {
 171         int ret;
 172         u8 data = reg;
 173         struct i2c_msg msg = {
 174                 .addr   = client->addr,
 175                 .flags  = 0,
 176                 .len    = 1,
 177                 .buf    = &data,
 178         };
 179
 180         ret = i2c_transfer(client->adapter, &msg, 1);
 181         if (ret < 0)
 182                 goto err;
 183
 184         msg.flags = I2C_M_RD;
 185         ret = i2c_transfer(client->adapter, &msg, 1);
 186         if (ret < 0)
 187                 goto err;
 188
 189         *val = data;
 190         return 0;
 191
 192 err:
 193         dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
 194         return ret;
 195 }
 196
 197 /* write a register */
 198 static int ov9640_reg_write(struct i2c_client *client, u8 reg, u8 val)
 199 {
 200         int ret;
 201         u8 _val;
 202         unsigned char data[2] = { reg, val };
 203         struct i2c_msg msg = {
 204                 .addr   = client->addr,
 205                 .flags  = 0,
 206                 .len    = 2,
 207                 .buf    = data,
 208         };
 209
 210         ret = i2c_transfer(client->adapter, &msg, 1);
 211         if (ret < 0) {
 212                 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
 213                 return ret;
 214         }
 215
 216         /* we have to read the register back ... no idea why, maybe HW bug */
 217         ret = ov9640_reg_read(client, reg, &_val);
 218         if (ret)
 219                 dev_err(&client->dev,
 220                         "Failed reading back register 0x%02x!\n", reg);
 221
 222         return 0;
 223 }
 224
 225
 226 /* Read a register, alter its bits, write it back */
 227 static int ov9640_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 unset)
 228 {
 229         u8 val;
 230         int ret;
 231
 232         ret = ov9640_reg_read(client, reg, &val);
 233         if (ret) {
 234                 dev_err(&client->dev,
 235                         "[Read]-Modify-Write of register %02x failed!\n", reg);
 236                 return val;
 237         }
 238
 239         val |= set;
 240         val &= ~unset;
 241
 242         ret = ov9640_reg_write(client, reg, val);
 243         if (ret)
 244                 dev_err(&client->dev,
 245                         "Read-Modify-[Write] of register %02x failed!\n", reg);
 246
 247         return ret;
 248 }
 249
 250 /* Soft reset the camera. This has nothing to do with the RESET pin! */
 251 static int ov9640_reset(struct i2c_client *client)
 252 {
 253         int ret;
 254
 255         ret = ov9640_reg_write(client, OV9640_COM7, OV9640_COM7_SCCB_RESET);
 256         if (ret)
 257                 dev_err(&client->dev,
 258                         "An error occurred while entering soft reset!\n");
 259
 260         return ret;
 261 }
 262
 263 /* Start/Stop streaming from the device */
 264 static int ov9640_s_stream(struct v4l2_subdev *sd, int enable)
 265 {
 266         return 0;
 267 }
 268
 269 /* Set status of additional camera capabilities */
 270 static int ov9640_s_ctrl(struct v4l2_ctrl *ctrl)
 271 {
 272         struct ov9640_priv *priv = container_of(ctrl->handler, struct ov9640_priv, hdl);
 273         struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
 274
 275         switch (ctrl->id) {
 276         case V4L2_CID_VFLIP:
 277                 if (ctrl->val)
 278                         return ov9640_reg_rmw(client, OV9640_MVFP,
 279                                                         OV9640_MVFP_V, 0);
 280                 return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_V);
 281         case V4L2_CID_HFLIP:
 282                 if (ctrl->val)
 283                         return ov9640_reg_rmw(client, OV9640_MVFP,
 284                                                         OV9640_MVFP_H, 0);
 285                 return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_H);
 286         }
 287         return -EINVAL;
 288 }
 289
 290 /* Get chip identification */
 291 static int ov9640_g_chip_ident(struct v4l2_subdev *sd,
 292                                 struct v4l2_dbg_chip_ident *id)
 293 {
 294         struct ov9640_priv *priv = to_ov9640_sensor(sd);
 295
 296         id->ident       = priv->model;
 297         id->revision    = priv->revision;
 298
 299         return 0;
 300 }
 301
 302 #ifdef CONFIG_VIDEO_ADV_DEBUG
 303 static int ov9640_get_register(struct v4l2_subdev *sd,
 304                                 struct v4l2_dbg_register *reg)
 305 {
 306         struct i2c_client *client = v4l2_get_subdevdata(sd);
 307         int ret;
 308         u8 val;
 309
 310         if (reg->reg & ~0xff)
 311                 return -EINVAL;
 312
 313         reg->size = 1;
 314
 315         ret = ov9640_reg_read(client, reg->reg, &val);
 316         if (ret)
 317                 return ret;
 318
 319         reg->val = (__u64)val;
 320
 321         return 0;
 322 }
 323
 324 static int ov9640_set_register(struct v4l2_subdev *sd,
 325                                 struct v4l2_dbg_register *reg)
 326 {
 327         struct i2c_client *client = v4l2_get_subdevdata(sd);
 328
 329         if (reg->reg & ~0xff || reg->val & ~0xff)
 330                 return -EINVAL;
 331
 332         return ov9640_reg_write(client, reg->reg, reg->val);
 333 }
 334 #endif
 335
 336 /* select nearest higher resolution for capture */
 337 static void ov9640_res_roundup(u32 *width, u32 *height)
 338 {
 339         int i;
 340         enum { QQCIF, QQVGA, QCIF, QVGA, CIF, VGA, SXGA };
 341         int res_x[] = { 88, 160, 176, 320, 352, 640, 1280 };
 342         int res_y[] = { 72, 120, 144, 240, 288, 480, 960 };
 343
 344         for (i = 0; i < ARRAY_SIZE(res_x); i++) {
 345                 if (res_x[i] >= *width && res_y[i] >= *height) {
 346                         *width = res_x[i];
 347                         *height = res_y[i];
 348                         return;
 349                 }
 350         }
 351
 352         *width = res_x[SXGA];
 353         *height = res_y[SXGA];
 354 }
 355
 356 /* Prepare necessary register changes depending on color encoding */
 357 static void ov9640_alter_regs(enum v4l2_mbus_pixelcode code,
 358                               struct ov9640_reg_alt *alt)
 359 {
 360         switch (code) {
 361         default:
 362         case V4L2_MBUS_FMT_UYVY8_2X8:
 363                 alt->com12      = OV9640_COM12_YUV_AVG;
 364                 alt->com13      = OV9640_COM13_Y_DELAY_EN |
 365                                         OV9640_COM13_YUV_DLY(0x01);
 366                 break;
 367         case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
 368                 alt->com7       = OV9640_COM7_RGB;
 369                 alt->com13      = OV9640_COM13_RGB_AVG;
 370                 alt->com15      = OV9640_COM15_RGB_555;
 371                 break;
 372         case V4L2_MBUS_FMT_RGB565_2X8_LE:
 373                 alt->com7       = OV9640_COM7_RGB;
 374                 alt->com13      = OV9640_COM13_RGB_AVG;
 375                 alt->com15      = OV9640_COM15_RGB_565;
 376                 break;
 377         };
 378 }
 379
 380 /* Setup registers according to resolution and color encoding */
 381 static int ov9640_write_regs(struct i2c_client *client, u32 width,
 382                 enum v4l2_mbus_pixelcode code, struct ov9640_reg_alt *alts)
 383 {
 384         const struct ov9640_reg *ov9640_regs, *matrix_regs;
 385         int                     ov9640_regs_len, matrix_regs_len;
 386         int                     i, ret;
 387         u8                      val;
 388
 389         /* select register configuration for given resolution */
 390         switch (width) {
 391         case W_QQCIF:
 392                 ov9640_regs     = ov9640_regs_qqcif;
 393                 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqcif);
 394                 break;
 395         case W_QQVGA:
 396                 ov9640_regs     = ov9640_regs_qqvga;
 397                 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqvga);
 398                 break;
 399         case W_QCIF:
 400                 ov9640_regs     = ov9640_regs_qcif;
 401                 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qcif);
 402                 break;
 403         case W_QVGA:
 404                 ov9640_regs     = ov9640_regs_qvga;
 405                 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qvga);
 406                 break;
 407         case W_CIF:
 408                 ov9640_regs     = ov9640_regs_cif;
 409                 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_cif);
 410                 break;
 411         case W_VGA:
 412                 ov9640_regs     = ov9640_regs_vga;
 413                 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_vga);
 414                 break;
 415         case W_SXGA:
 416                 ov9640_regs     = ov9640_regs_sxga;
 417                 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_sxga);
 418                 break;
 419         default:
 420                 dev_err(&client->dev, "Failed to select resolution!\n");
 421                 return -EINVAL;
 422         }
 423
 424         /* select color matrix configuration for given color encoding */
 425         if (code == V4L2_MBUS_FMT_UYVY8_2X8) {
 426                 matrix_regs     = ov9640_regs_yuv;
 427                 matrix_regs_len = ARRAY_SIZE(ov9640_regs_yuv);
 428         } else {
 429                 matrix_regs     = ov9640_regs_rgb;
 430                 matrix_regs_len = ARRAY_SIZE(ov9640_regs_rgb);
 431         }
 432
 433         /* write register settings into the module */
 434         for (i = 0; i < ov9640_regs_len; i++) {
 435                 val = ov9640_regs[i].val;
 436
 437                 switch (ov9640_regs[i].reg) {
 438                 case OV9640_COM7:
 439                         val |= alts->com7;
 440                         break;
 441                 case OV9640_COM12:
 442                         val |= alts->com12;
 443                         break;
 444                 case OV9640_COM13:
 445                         val |= alts->com13;
 446                         break;
 447                 case OV9640_COM15:
 448                         val |= alts->com15;
 449                         break;
 450                 }
 451
 452                 ret = ov9640_reg_write(client, ov9640_regs[i].reg, val);
 453                 if (ret)
 454                         return ret;
 455         }
 456
 457         /* write color matrix configuration into the module */
 458         for (i = 0; i < matrix_regs_len; i++) {
 459                 ret = ov9640_reg_write(client, matrix_regs[i].reg,
 460                                                 matrix_regs[i].val);
 461                 if (ret)
 462                         return ret;
 463         }
 464
 465         return 0;
 466 }
 467
 468 /* program default register values */
 469 static int ov9640_prog_dflt(struct i2c_client *client)
 470 {
 471         int i, ret;
 472
 473         for (i = 0; i < ARRAY_SIZE(ov9640_regs_dflt); i++) {
 474                 ret = ov9640_reg_write(client, ov9640_regs_dflt[i].reg,
 475                                                 ov9640_regs_dflt[i].val);
 476                 if (ret)
 477                         return ret;
 478         }
 479
 480         /* wait for the changes to actually happen, 140ms are not enough yet */
 481         mdelay(150);
 482
 483         return 0;
 484 }
 485
 486 /* set the format we will capture in */
 487 static int ov9640_s_fmt(struct v4l2_subdev *sd,
 488                         struct v4l2_mbus_framefmt *mf)
 489 {
 490         struct i2c_client *client = v4l2_get_subdevdata(sd);
 491         struct ov9640_reg_alt alts = {0};
 492         enum v4l2_colorspace cspace;
 493         enum v4l2_mbus_pixelcode code = mf->code;
 494         int ret;
 495
 496         ov9640_res_roundup(&mf->width, &mf->height);
 497         ov9640_alter_regs(mf->code, &alts);
 498
 499         ov9640_reset(client);
 500
 501         ret = ov9640_prog_dflt(client);
 502         if (ret)
 503                 return ret;
 504
 505         switch (code) {
 506         case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
 507         case V4L2_MBUS_FMT_RGB565_2X8_LE:
 508                 cspace = V4L2_COLORSPACE_SRGB;
 509                 break;
 510         default:
 511                 code = V4L2_MBUS_FMT_UYVY8_2X8;
 512         case V4L2_MBUS_FMT_UYVY8_2X8:
 513                 cspace = V4L2_COLORSPACE_JPEG;
 514         }
 515
 516         ret = ov9640_write_regs(client, mf->width, code, &alts);
 517         if (!ret) {
 518                 mf->code        = code;
 519                 mf->colorspace  = cspace;
 520         }
 521
 522         return ret;
 523 }
 524
 525 static int ov9640_try_fmt(struct v4l2_subdev *sd,
 526                           struct v4l2_mbus_framefmt *mf)
 527 {
 528         ov9640_res_roundup(&mf->width, &mf->height);
 529
 530         mf->field = V4L2_FIELD_NONE;
 531
 532         switch (mf->code) {
 533         case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
 534         case V4L2_MBUS_FMT_RGB565_2X8_LE:
 535                 mf->colorspace = V4L2_COLORSPACE_SRGB;
 536                 break;
 537         default:
 538                 mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
 539         case V4L2_MBUS_FMT_UYVY8_2X8:
 540                 mf->colorspace = V4L2_COLORSPACE_JPEG;
 541         }
 542
 543         return 0;
 544 }
 545
 546 static int ov9640_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 547                            enum v4l2_mbus_pixelcode *code)
 548 {
 549         if (index >= ARRAY_SIZE(ov9640_codes))
 550                 return -EINVAL;
 551
 552         *code = ov9640_codes[index];
 553         return 0;
 554 }
 555
 556 static int ov9640_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 557 {
 558         a->c.left       = 0;
 559         a->c.top        = 0;
 560         a->c.width      = W_SXGA;
 561         a->c.height     = H_SXGA;
 562         a->type         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 563
 564         return 0;
 565 }
 566
 567 static int ov9640_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 568 {
 569         a->bounds.left                  = 0;
 570         a->bounds.top                   = 0;
 571         a->bounds.width                 = W_SXGA;
 572         a->bounds.height                = H_SXGA;
 573         a->defrect                      = a->bounds;
 574         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 575         a->pixelaspect.numerator        = 1;
 576         a->pixelaspect.denominator      = 1;
 577
 578         return 0;
 579 }
 580
 581 static int ov9640_video_probe(struct i2c_client *client)
 582 {
 583         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 584         struct ov9640_priv *priv = to_ov9640_sensor(sd);
 585         u8              pid, ver, midh, midl;
 586         const char      *devname;
 587         int             ret = 0;
 588
 589         /*
 590          * check and show product ID and manufacturer ID
 591          */
 592
 593         ret = ov9640_reg_read(client, OV9640_PID, &pid);
 594         if (!ret)
 595                 ret = ov9640_reg_read(client, OV9640_VER, &ver);
 596         if (!ret)
 597                 ret = ov9640_reg_read(client, OV9640_MIDH, &midh);
 598         if (!ret)
 599                 ret = ov9640_reg_read(client, OV9640_MIDL, &midl);
 600         if (ret)
 601                 return ret;
 602
 603         switch (VERSION(pid, ver)) {
 604         case OV9640_V2:
 605                 devname         = "ov9640";
 606                 priv->model     = V4L2_IDENT_OV9640;
 607                 priv->revision  = 2;
 608         case OV9640_V3:
 609                 devname         = "ov9640";
 610                 priv->model     = V4L2_IDENT_OV9640;
 611                 priv->revision  = 3;
 612                 break;
 613         default:
 614                 dev_err(&client->dev, "Product ID error %x:%x\n", pid, ver);
 615                 return -ENODEV;
 616         }
 617
 618         dev_info(&client->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
 619                  devname, pid, ver, midh, midl);
 620
 621         return v4l2_ctrl_handler_setup(&priv->hdl);
 622 }
 623
 624 static const struct v4l2_ctrl_ops ov9640_ctrl_ops = {
 625         .s_ctrl = ov9640_s_ctrl,
 626 };
 627
 628 static struct v4l2_subdev_core_ops ov9640_core_ops = {
 629         .g_chip_ident           = ov9640_g_chip_ident,
 630 #ifdef CONFIG_VIDEO_ADV_DEBUG
 631         .g_register             = ov9640_get_register,
 632         .s_register             = ov9640_set_register,
 633 #endif
 634
 635 };
 636
 637 /* Request bus settings on camera side */
 638 static int ov9640_g_mbus_config(struct v4l2_subdev *sd,
 639                                 struct v4l2_mbus_config *cfg)
 640 {
 641         struct i2c_client *client = v4l2_get_subdevdata(sd);
 642         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 643
 644         cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
 645                 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
 646                 V4L2_MBUS_DATA_ACTIVE_HIGH;
 647         cfg->type = V4L2_MBUS_PARALLEL;
 648         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
 649
 650         return 0;
 651 }
 652
 653 static struct v4l2_subdev_video_ops ov9640_video_ops = {
 654         .s_stream       = ov9640_s_stream,
 655         .s_mbus_fmt     = ov9640_s_fmt,
 656         .try_mbus_fmt   = ov9640_try_fmt,
 657         .enum_mbus_fmt  = ov9640_enum_fmt,
 658         .cropcap        = ov9640_cropcap,
 659         .g_crop         = ov9640_g_crop,
 660         .g_mbus_config  = ov9640_g_mbus_config,
 661 };
 662
 663 static struct v4l2_subdev_ops ov9640_subdev_ops = {
 664         .core   = &ov9640_core_ops,
 665         .video  = &ov9640_video_ops,
 666 };
 667
 668 /*
 669  * i2c_driver function
 670  */
 671 static int ov9640_probe(struct i2c_client *client,
 672                         const struct i2c_device_id *did)
 673 {
 674         struct ov9640_priv *priv;
 675         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 676         int ret;
 677
 678         if (!icl) {
 679                 dev_err(&client->dev, "Missing platform_data for driver\n");
 680                 return -EINVAL;
 681         }
 682
 683         priv = kzalloc(sizeof(struct ov9640_priv), GFP_KERNEL);
 684         if (!priv) {
 685                 dev_err(&client->dev,
 686                         "Failed to allocate memory for private data!\n");
 687                 return -ENOMEM;
 688         }
 689
 690         v4l2_i2c_subdev_init(&priv->subdev, client, &ov9640_subdev_ops);
 691
 692         v4l2_ctrl_handler_init(&priv->hdl, 2);
 693         v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,
 694                         V4L2_CID_VFLIP, 0, 1, 1, 0);
 695         v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,
 696                         V4L2_CID_HFLIP, 0, 1, 1, 0);
 697         priv->subdev.ctrl_handler = &priv->hdl;
 698         if (priv->hdl.error) {
 699                 int err = priv->hdl.error;
 700
 701                 kfree(priv);
 702                 return err;
 703         }
 704
 705         ret = ov9640_video_probe(client);
 706
 707         if (ret) {
 708                 v4l2_ctrl_handler_free(&priv->hdl);
 709                 kfree(priv);
 710         }
 711
 712         return ret;
 713 }
 714
 715 static int ov9640_remove(struct i2c_client *client)
 716 {
 717         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 718         struct ov9640_priv *priv = to_ov9640_sensor(sd);
 719
 720         v4l2_device_unregister_subdev(&priv->subdev);
 721         v4l2_ctrl_handler_free(&priv->hdl);
 722         kfree(priv);
 723         return 0;
 724 }
 725
 726 static const struct i2c_device_id ov9640_id[] = {
 727         { "ov9640", 0 },
 728         { }
 729 };
 730 MODULE_DEVICE_TABLE(i2c, ov9640_id);
 731
 732 static struct i2c_driver ov9640_i2c_driver = {
 733         .driver = {
 734                 .name = "ov9640",
 735         },
 736         .probe    = ov9640_probe,
 737         .remove   = ov9640_remove,
 738         .id_table = ov9640_id,
 739 };
 740
 741 static int __init ov9640_module_init(void)
 742 {
 743         return i2c_add_driver(&ov9640_i2c_driver);
 744 }
 745
 746 static void __exit ov9640_module_exit(void)
 747 {
 748         i2c_del_driver(&ov9640_i2c_driver);
 749 }
 750
 751 module_init(ov9640_module_init);
 752 module_exit(ov9640_module_exit);
 753
 754 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV96xx");
 755 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 756 MODULE_LICENSE("GPL v2");