drivers/media/usb/gspca/m5602/m5602_mt9m111.c

   1 /*
   2  * Driver for the mt9m111 sensor
   3  *
   4  * Copyright (C) 2008 Erik Andrén
   5  * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
   6  * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
   7  *
   8  * Portions of code to USB interface and ALi driver software,
   9  * Copyright (c) 2006 Willem Duinker
  10  * v4l2 interface modeled after the V4L2 driver
  11  * for SN9C10x PC Camera Controllers
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation, version 2.
  16  *
  17  */
  18
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include "m5602_mt9m111.h"
  22
  23 static int mt9m111_s_ctrl(struct v4l2_ctrl *ctrl);
  24 static void mt9m111_dump_registers(struct sd *sd);
  25
  26 static const unsigned char preinit_mt9m111[][4] = {
  27         {BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02, 0x00},
  28         {BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0, 0x00},
  29         {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00, 0x00},
  30         {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0, 0x00},
  31         {BRIDGE, M5602_XB_SENSOR_TYPE, 0x0d, 0x00},
  32         {BRIDGE, M5602_XB_SENSOR_CTRL, 0x00, 0x00},
  33         {BRIDGE, M5602_XB_ADC_CTRL, 0xc0, 0x00},
  34         {BRIDGE, M5602_XB_SENSOR_TYPE, 0x09, 0x00},
  35
  36         {SENSOR, MT9M111_PAGE_MAP, 0x00, 0x00},
  37         {SENSOR, MT9M111_SC_RESET,
  38                 MT9M111_RESET |
  39                 MT9M111_RESTART |
  40                 MT9M111_ANALOG_STANDBY |
  41                 MT9M111_CHIP_DISABLE,
  42                 MT9M111_SHOW_BAD_FRAMES |
  43                 MT9M111_RESTART_BAD_FRAMES |
  44                 MT9M111_SYNCHRONIZE_CHANGES},
  45
  46         {BRIDGE, M5602_XB_GPIO_DIR, 0x05, 0x00},
  47         {BRIDGE, M5602_XB_GPIO_DAT, 0x04, 0x00},
  48         {BRIDGE, M5602_XB_GPIO_EN_H, 0x3e, 0x00},
  49         {BRIDGE, M5602_XB_GPIO_DIR_H, 0x3e, 0x00},
  50         {BRIDGE, M5602_XB_GPIO_DAT_H, 0x02, 0x00},
  51         {BRIDGE, M5602_XB_GPIO_EN_L, 0xff, 0x00},
  52         {BRIDGE, M5602_XB_GPIO_DIR_L, 0xff, 0x00},
  53         {BRIDGE, M5602_XB_GPIO_DAT_L, 0x00, 0x00},
  54
  55         {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00, 0x00},
  56         {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0, 0x00},
  57         {BRIDGE, M5602_XB_GPIO_DIR, 0x07, 0x00},
  58         {BRIDGE, M5602_XB_GPIO_DAT, 0x0b, 0x00},
  59         {BRIDGE, M5602_XB_GPIO_EN_H, 0x06, 0x00},
  60         {BRIDGE, M5602_XB_GPIO_EN_L, 0x00, 0x00},
  61
  62         {BRIDGE, M5602_XB_I2C_CLK_DIV, 0x0a, 0x00}
  63 };
  64
  65 static const unsigned char init_mt9m111[][4] = {
  66         {BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02, 0x00},
  67         {BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0, 0x00},
  68         {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00, 0x00},
  69         {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0, 0x00},
  70         {BRIDGE, M5602_XB_ADC_CTRL, 0xc0, 0x00},
  71         {BRIDGE, M5602_XB_SENSOR_TYPE, 0x09, 0x00},
  72
  73         {BRIDGE, M5602_XB_GPIO_EN_H, 0x06, 0x00},
  74         {BRIDGE, M5602_XB_GPIO_EN_L, 0x00, 0x00},
  75         {BRIDGE, M5602_XB_GPIO_DAT, 0x04, 0x00},
  76         {BRIDGE, M5602_XB_GPIO_DIR_H, 0x3e, 0x00},
  77         {BRIDGE, M5602_XB_GPIO_DIR_L, 0xff, 0x00},
  78         {BRIDGE, M5602_XB_GPIO_DAT_H, 0x02, 0x00},
  79         {BRIDGE, M5602_XB_GPIO_DAT_L, 0x00, 0x00},
  80         {BRIDGE, M5602_XB_GPIO_DIR, 0x07, 0x00},
  81         {BRIDGE, M5602_XB_GPIO_DAT, 0x0b, 0x00},
  82         {BRIDGE, M5602_XB_I2C_CLK_DIV, 0x0a, 0x00},
  83
  84         {SENSOR, MT9M111_SC_RESET, 0x00, 0x29},
  85         {SENSOR, MT9M111_PAGE_MAP, 0x00, 0x00},
  86         {SENSOR, MT9M111_SC_RESET, 0x00, 0x08},
  87         {SENSOR, MT9M111_PAGE_MAP, 0x00, 0x01},
  88         {SENSOR, MT9M111_CP_OPERATING_MODE_CTL, 0x00,
  89                         MT9M111_CP_OPERATING_MODE_CTL},
  90         {SENSOR, MT9M111_CP_LENS_CORRECTION_1, 0x04, 0x2a},
  91         {SENSOR, MT9M111_CP_DEFECT_CORR_CONTEXT_A, 0x00,
  92                                 MT9M111_2D_DEFECT_CORRECTION_ENABLE},
  93         {SENSOR, MT9M111_CP_DEFECT_CORR_CONTEXT_B, 0x00,
  94                                 MT9M111_2D_DEFECT_CORRECTION_ENABLE},
  95         {SENSOR, MT9M111_CP_LUMA_OFFSET, 0x00, 0x00},
  96         {SENSOR, MT9M111_CP_LUMA_CLIP, 0xff, 0x00},
  97         {SENSOR, MT9M111_CP_OUTPUT_FORMAT_CTL2_CONTEXT_A, 0x14, 0x00},
  98         {SENSOR, MT9M111_CP_OUTPUT_FORMAT_CTL2_CONTEXT_B, 0x14, 0x00},
  99         {SENSOR, 0xcd, 0x00, 0x0e},
 100         {SENSOR, 0xd0, 0x00, 0x40},
 101
 102         {SENSOR, MT9M111_PAGE_MAP, 0x00, 0x02},
 103         {SENSOR, MT9M111_CC_AUTO_EXPOSURE_PARAMETER_18, 0x00, 0x00},
 104         {SENSOR, MT9M111_CC_AWB_PARAMETER_7, 0xef, 0x03},
 105
 106         {SENSOR, MT9M111_PAGE_MAP, 0x00, 0x00},
 107         {SENSOR, 0x33, 0x03, 0x49},
 108         {SENSOR, 0x34, 0xc0, 0x19},
 109         {SENSOR, 0x3f, 0x20, 0x20},
 110         {SENSOR, 0x40, 0x20, 0x20},
 111         {SENSOR, 0x5a, 0xc0, 0x0a},
 112         {SENSOR, 0x70, 0x7b, 0x0a},
 113         {SENSOR, 0x71, 0xff, 0x00},
 114         {SENSOR, 0x72, 0x19, 0x0e},
 115         {SENSOR, 0x73, 0x18, 0x0f},
 116         {SENSOR, 0x74, 0x57, 0x32},
 117         {SENSOR, 0x75, 0x56, 0x34},
 118         {SENSOR, 0x76, 0x73, 0x35},
 119         {SENSOR, 0x77, 0x30, 0x12},
 120         {SENSOR, 0x78, 0x79, 0x02},
 121         {SENSOR, 0x79, 0x75, 0x06},
 122         {SENSOR, 0x7a, 0x77, 0x0a},
 123         {SENSOR, 0x7b, 0x78, 0x09},
 124         {SENSOR, 0x7c, 0x7d, 0x06},
 125         {SENSOR, 0x7d, 0x31, 0x10},
 126         {SENSOR, 0x7e, 0x00, 0x7e},
 127         {SENSOR, 0x80, 0x59, 0x04},
 128         {SENSOR, 0x81, 0x59, 0x04},
 129         {SENSOR, 0x82, 0x57, 0x0a},
 130         {SENSOR, 0x83, 0x58, 0x0b},
 131         {SENSOR, 0x84, 0x47, 0x0c},
 132         {SENSOR, 0x85, 0x48, 0x0e},
 133         {SENSOR, 0x86, 0x5b, 0x02},
 134         {SENSOR, 0x87, 0x00, 0x5c},
 135         {SENSOR, MT9M111_CONTEXT_CONTROL, 0x00, MT9M111_SEL_CONTEXT_B},
 136         {SENSOR, 0x60, 0x00, 0x80},
 137         {SENSOR, 0x61, 0x00, 0x00},
 138         {SENSOR, 0x62, 0x00, 0x00},
 139         {SENSOR, 0x63, 0x00, 0x00},
 140         {SENSOR, 0x64, 0x00, 0x00},
 141
 142         {SENSOR, MT9M111_SC_ROWSTART, 0x00, 0x0d}, /* 13 */
 143         {SENSOR, MT9M111_SC_COLSTART, 0x00, 0x12}, /* 18 */
 144         {SENSOR, MT9M111_SC_WINDOW_HEIGHT, 0x04, 0x00}, /* 1024 */
 145         {SENSOR, MT9M111_SC_WINDOW_WIDTH, 0x05, 0x10}, /* 1296 */
 146         {SENSOR, MT9M111_SC_HBLANK_CONTEXT_B, 0x01, 0x60}, /* 352 */
 147         {SENSOR, MT9M111_SC_VBLANK_CONTEXT_B, 0x00, 0x11}, /* 17 */
 148         {SENSOR, MT9M111_SC_HBLANK_CONTEXT_A, 0x01, 0x60}, /* 352 */
 149         {SENSOR, MT9M111_SC_VBLANK_CONTEXT_A, 0x00, 0x11}, /* 17 */
 150         {SENSOR, MT9M111_SC_R_MODE_CONTEXT_A, 0x01, 0x0f}, /* 271 */
 151         {SENSOR, 0x30, 0x04, 0x00},
 152         /* Set number of blank rows chosen to 400 */
 153         {SENSOR, MT9M111_SC_SHUTTER_WIDTH, 0x01, 0x90},
 154 };
 155
 156 static const unsigned char start_mt9m111[][4] = {
 157         {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x06, 0x00},
 158         {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0, 0x00},
 159         {BRIDGE, M5602_XB_ADC_CTRL, 0xc0, 0x00},
 160         {BRIDGE, M5602_XB_SENSOR_TYPE, 0x09, 0x00},
 161         {BRIDGE, M5602_XB_LINE_OF_FRAME_H, 0x81, 0x00},
 162         {BRIDGE, M5602_XB_PIX_OF_LINE_H, 0x82, 0x00},
 163         {BRIDGE, M5602_XB_SIG_INI, 0x01, 0x00},
 164         {BRIDGE, M5602_XB_VSYNC_PARA, 0x00, 0x00},
 165         {BRIDGE, M5602_XB_VSYNC_PARA, 0x00, 0x00},
 166         {BRIDGE, M5602_XB_VSYNC_PARA, 0x00, 0x00},
 167         {BRIDGE, M5602_XB_VSYNC_PARA, 0x00, 0x00},
 168 };
 169
 170 static struct v4l2_pix_format mt9m111_modes[] = {
 171         {
 172                 640,
 173                 480,
 174                 V4L2_PIX_FMT_SBGGR8,
 175                 V4L2_FIELD_NONE,
 176                 .sizeimage = 640 * 480,
 177                 .bytesperline = 640,
 178                 .colorspace = V4L2_COLORSPACE_SRGB,
 179                 .priv = 0
 180         }
 181 };
 182
 183 static const struct v4l2_ctrl_ops mt9m111_ctrl_ops = {
 184         .s_ctrl = mt9m111_s_ctrl,
 185 };
 186
 187 static const struct v4l2_ctrl_config mt9m111_greenbal_cfg = {
 188         .ops    = &mt9m111_ctrl_ops,
 189         .id     = M5602_V4L2_CID_GREEN_BALANCE,
 190         .name   = "Green Balance",
 191         .type   = V4L2_CTRL_TYPE_INTEGER,
 192         .min    = 0,
 193         .max    = 0x7ff,
 194         .step   = 1,
 195         .def    = MT9M111_GREEN_GAIN_DEFAULT,
 196         .flags  = V4L2_CTRL_FLAG_SLIDER,
 197 };
 198
 199 int mt9m111_probe(struct sd *sd)
 200 {
 201         u8 data[2] = {0x00, 0x00};
 202         int i;
 203         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 204
 205         if (force_sensor) {
 206                 if (force_sensor == MT9M111_SENSOR) {
 207                         pr_info("Forcing a %s sensor\n", mt9m111.name);
 208                         goto sensor_found;
 209                 }
 210                 /* If we want to force another sensor, don't try to probe this
 211                  * one */
 212                 return -ENODEV;
 213         }
 214
 215         PDEBUG(D_PROBE, "Probing for a mt9m111 sensor");
 216
 217         /* Do the preinit */
 218         for (i = 0; i < ARRAY_SIZE(preinit_mt9m111); i++) {
 219                 if (preinit_mt9m111[i][0] == BRIDGE) {
 220                         m5602_write_bridge(sd,
 221                                 preinit_mt9m111[i][1],
 222                                 preinit_mt9m111[i][2]);
 223                 } else {
 224                         data[0] = preinit_mt9m111[i][2];
 225                         data[1] = preinit_mt9m111[i][3];
 226                         m5602_write_sensor(sd,
 227                                 preinit_mt9m111[i][1], data, 2);
 228                 }
 229         }
 230
 231         if (m5602_read_sensor(sd, MT9M111_SC_CHIPVER, data, 2))
 232                 return -ENODEV;
 233
 234         if ((data[0] == 0x14) && (data[1] == 0x3a)) {
 235                 pr_info("Detected a mt9m111 sensor\n");
 236                 goto sensor_found;
 237         }
 238
 239         return -ENODEV;
 240
 241 sensor_found:
 242         sd->gspca_dev.cam.cam_mode = mt9m111_modes;
 243         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(mt9m111_modes);
 244
 245         return 0;
 246 }
 247
 248 int mt9m111_init(struct sd *sd)
 249 {
 250         int i, err = 0;
 251
 252         /* Init the sensor */
 253         for (i = 0; i < ARRAY_SIZE(init_mt9m111) && !err; i++) {
 254                 u8 data[2];
 255
 256                 if (init_mt9m111[i][0] == BRIDGE) {
 257                         err = m5602_write_bridge(sd,
 258                                 init_mt9m111[i][1],
 259                                 init_mt9m111[i][2]);
 260                 } else {
 261                         data[0] = init_mt9m111[i][2];
 262                         data[1] = init_mt9m111[i][3];
 263                         err = m5602_write_sensor(sd,
 264                                 init_mt9m111[i][1], data, 2);
 265                 }
 266         }
 267
 268         if (dump_sensor)
 269                 mt9m111_dump_registers(sd);
 270
 271         return 0;
 272 }
 273
 274 int mt9m111_init_controls(struct sd *sd)
 275 {
 276         struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
 277
 278         sd->gspca_dev.vdev.ctrl_handler = hdl;
 279         v4l2_ctrl_handler_init(hdl, 7);
 280
 281         sd->auto_white_bal = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops,
 282                                                V4L2_CID_AUTO_WHITE_BALANCE,
 283                                                0, 1, 1, 0);
 284         sd->green_bal = v4l2_ctrl_new_custom(hdl, &mt9m111_greenbal_cfg, NULL);
 285         sd->red_bal = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops,
 286                                         V4L2_CID_RED_BALANCE, 0, 0x7ff, 1,
 287                                         MT9M111_RED_GAIN_DEFAULT);
 288         sd->blue_bal = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops,
 289                                         V4L2_CID_BLUE_BALANCE, 0, 0x7ff, 1,
 290                                         MT9M111_BLUE_GAIN_DEFAULT);
 291
 292         v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops, V4L2_CID_GAIN, 0,
 293                           (INITIAL_MAX_GAIN - 1) * 2 * 2 * 2, 1,
 294                           MT9M111_DEFAULT_GAIN);
 295
 296         sd->hflip = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops, V4L2_CID_HFLIP,
 297                                       0, 1, 1, 0);
 298         sd->vflip = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops, V4L2_CID_VFLIP,
 299                                       0, 1, 1, 0);
 300
 301         if (hdl->error) {
 302                 pr_err("Could not initialize controls\n");
 303                 return hdl->error;
 304         }
 305
 306         v4l2_ctrl_auto_cluster(4, &sd->auto_white_bal, 0, false);
 307         v4l2_ctrl_cluster(2, &sd->hflip);
 308
 309         return 0;
 310 }
 311
 312 int mt9m111_start(struct sd *sd)
 313 {
 314         int i, err = 0;
 315         u8 data[2];
 316         struct cam *cam = &sd->gspca_dev.cam;
 317         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 318
 319         int width = cam->cam_mode[sd->gspca_dev.curr_mode].width - 1;
 320         int height = cam->cam_mode[sd->gspca_dev.curr_mode].height;
 321
 322         for (i = 0; i < ARRAY_SIZE(start_mt9m111) && !err; i++) {
 323                 if (start_mt9m111[i][0] == BRIDGE) {
 324                         err = m5602_write_bridge(sd,
 325                                 start_mt9m111[i][1],
 326                                 start_mt9m111[i][2]);
 327                 } else {
 328                         data[0] = start_mt9m111[i][2];
 329                         data[1] = start_mt9m111[i][3];
 330                         err = m5602_write_sensor(sd,
 331                                 start_mt9m111[i][1], data, 2);
 332                 }
 333         }
 334         if (err < 0)
 335                 return err;
 336
 337         err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height >> 8) & 0xff);
 338         if (err < 0)
 339                 return err;
 340
 341         err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height & 0xff));
 342         if (err < 0)
 343                 return err;
 344
 345         for (i = 0; i < 2 && !err; i++)
 346                 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0);
 347         if (err < 0)
 348                 return err;
 349
 350         err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0);
 351         if (err < 0)
 352                 return err;
 353
 354         err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 2);
 355         if (err < 0)
 356                 return err;
 357
 358         for (i = 0; i < 2 && !err; i++)
 359                 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, 0);
 360         if (err < 0)
 361                 return err;
 362
 363         err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
 364                                  (width >> 8) & 0xff);
 365         if (err < 0)
 366                 return err;
 367
 368         err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, width & 0xff);
 369         if (err < 0)
 370                 return err;
 371
 372         err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0);
 373         if (err < 0)
 374                 return err;
 375
 376         switch (width) {
 377         case 640:
 378                 PDEBUG(D_CONF, "Configuring camera for VGA mode");
 379                 break;
 380
 381         case 320:
 382                 PDEBUG(D_CONF, "Configuring camera for QVGA mode");
 383                 break;
 384         }
 385         return err;
 386 }
 387
 388 void mt9m111_disconnect(struct sd *sd)
 389 {
 390         sd->sensor = NULL;
 391 }
 392
 393 static int mt9m111_set_hvflip(struct gspca_dev *gspca_dev)
 394 {
 395         int err;
 396         u8 data[2] = {0x00, 0x00};
 397         struct sd *sd = (struct sd *) gspca_dev;
 398         int hflip;
 399         int vflip;
 400
 401         PDEBUG(D_CONF, "Set hvflip to %d %d", sd->hflip->val, sd->vflip->val);
 402
 403         /* The mt9m111 is flipped by default */
 404         hflip = !sd->hflip->val;
 405         vflip = !sd->vflip->val;
 406
 407         /* Set the correct page map */
 408         err = m5602_write_sensor(sd, MT9M111_PAGE_MAP, data, 2);
 409         if (err < 0)
 410                 return err;
 411
 412         data[0] = MT9M111_RMB_OVER_SIZED;
 413         if (gspca_dev->pixfmt.width == 640) {
 414                 data[1] = MT9M111_RMB_ROW_SKIP_2X |
 415                           MT9M111_RMB_COLUMN_SKIP_2X |
 416                           (hflip << 1) | vflip;
 417         } else {
 418                 data[1] = MT9M111_RMB_ROW_SKIP_4X |
 419                           MT9M111_RMB_COLUMN_SKIP_4X |
 420                           (hflip << 1) | vflip;
 421         }
 422         err = m5602_write_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B,
 423                                         data, 2);
 424         return err;
 425 }
 426
 427 static int mt9m111_set_auto_white_balance(struct gspca_dev *gspca_dev,
 428                                           __s32 val)
 429 {
 430         struct sd *sd = (struct sd *) gspca_dev;
 431         int err;
 432         u8 data[2];
 433
 434         err = m5602_read_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
 435         if (err < 0)
 436                 return err;
 437
 438         data[1] = ((data[1] & 0xfd) | ((val & 0x01) << 1));
 439
 440         err = m5602_write_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
 441
 442         PDEBUG(D_CONF, "Set auto white balance %d", val);
 443         return err;
 444 }
 445
 446 static int mt9m111_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 447 {
 448         int err, tmp;
 449         u8 data[2] = {0x00, 0x00};
 450         struct sd *sd = (struct sd *) gspca_dev;
 451
 452         /* Set the correct page map */
 453         err = m5602_write_sensor(sd, MT9M111_PAGE_MAP, data, 2);
 454         if (err < 0)
 455                 return err;
 456
 457         if (val >= INITIAL_MAX_GAIN * 2 * 2 * 2)
 458                 return -EINVAL;
 459
 460         if ((val >= INITIAL_MAX_GAIN * 2 * 2) &&
 461             (val < (INITIAL_MAX_GAIN - 1) * 2 * 2 * 2))
 462                 tmp = (1 << 10) | (val << 9) |
 463                                 (val << 8) | (val / 8);
 464         else if ((val >= INITIAL_MAX_GAIN * 2) &&
 465                  (val <  INITIAL_MAX_GAIN * 2 * 2))
 466                 tmp = (1 << 9) | (1 << 8) | (val / 4);
 467         else if ((val >= INITIAL_MAX_GAIN) &&
 468                  (val < INITIAL_MAX_GAIN * 2))
 469                 tmp = (1 << 8) | (val / 2);
 470         else
 471                 tmp = val;
 472
 473         data[1] = (tmp & 0xff);
 474         data[0] = (tmp & 0xff00) >> 8;
 475         PDEBUG(D_CONF, "tmp=%d, data[1]=%d, data[0]=%d", tmp,
 476                data[1], data[0]);
 477
 478         err = m5602_write_sensor(sd, MT9M111_SC_GLOBAL_GAIN,
 479                                    data, 2);
 480
 481         return err;
 482 }
 483
 484 static int mt9m111_set_green_balance(struct gspca_dev *gspca_dev, __s32 val)
 485 {
 486         int err;
 487         u8 data[2];
 488         struct sd *sd = (struct sd *) gspca_dev;
 489
 490         data[1] = (val & 0xff);
 491         data[0] = (val & 0xff00) >> 8;
 492
 493         PDEBUG(D_CONF, "Set green balance %d", val);
 494         err = m5602_write_sensor(sd, MT9M111_SC_GREEN_1_GAIN,
 495                                  data, 2);
 496         if (err < 0)
 497                 return err;
 498
 499         return m5602_write_sensor(sd, MT9M111_SC_GREEN_2_GAIN,
 500                                   data, 2);
 501 }
 502
 503 static int mt9m111_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
 504 {
 505         u8 data[2];
 506         struct sd *sd = (struct sd *) gspca_dev;
 507
 508         data[1] = (val & 0xff);
 509         data[0] = (val & 0xff00) >> 8;
 510
 511         PDEBUG(D_CONF, "Set blue balance %d", val);
 512
 513         return m5602_write_sensor(sd, MT9M111_SC_BLUE_GAIN,
 514                                   data, 2);
 515 }
 516
 517 static int mt9m111_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
 518 {
 519         u8 data[2];
 520         struct sd *sd = (struct sd *) gspca_dev;
 521
 522         data[1] = (val & 0xff);
 523         data[0] = (val & 0xff00) >> 8;
 524
 525         PDEBUG(D_CONF, "Set red balance %d", val);
 526
 527         return m5602_write_sensor(sd, MT9M111_SC_RED_GAIN,
 528                                   data, 2);
 529 }
 530
 531 static int mt9m111_s_ctrl(struct v4l2_ctrl *ctrl)
 532 {
 533         struct gspca_dev *gspca_dev =
 534                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 535         struct sd *sd = (struct sd *) gspca_dev;
 536         int err;
 537
 538         if (!gspca_dev->streaming)
 539                 return 0;
 540
 541         switch (ctrl->id) {
 542         case V4L2_CID_AUTO_WHITE_BALANCE:
 543                 err = mt9m111_set_auto_white_balance(gspca_dev, ctrl->val);
 544                 if (err || ctrl->val)
 545                         return err;
 546                 err = mt9m111_set_green_balance(gspca_dev, sd->green_bal->val);
 547                 if (err)
 548                         return err;
 549                 err = mt9m111_set_red_balance(gspca_dev, sd->red_bal->val);
 550                 if (err)
 551                         return err;
 552                 err = mt9m111_set_blue_balance(gspca_dev, sd->blue_bal->val);
 553                 break;
 554         case V4L2_CID_GAIN:
 555                 err = mt9m111_set_gain(gspca_dev, ctrl->val);
 556                 break;
 557         case V4L2_CID_HFLIP:
 558                 err = mt9m111_set_hvflip(gspca_dev);
 559                 break;
 560         default:
 561                 return -EINVAL;
 562         }
 563
 564         return err;
 565 }
 566
 567 static void mt9m111_dump_registers(struct sd *sd)
 568 {
 569         u8 address, value[2] = {0x00, 0x00};
 570
 571         pr_info("Dumping the mt9m111 register state\n");
 572
 573         pr_info("Dumping the mt9m111 sensor core registers\n");
 574         value[1] = MT9M111_SENSOR_CORE;
 575         m5602_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
 576         for (address = 0; address < 0xff; address++) {
 577                 m5602_read_sensor(sd, address, value, 2);
 578                 pr_info("register 0x%x contains 0x%x%x\n",
 579                         address, value[0], value[1]);
 580         }
 581
 582         pr_info("Dumping the mt9m111 color pipeline registers\n");
 583         value[1] = MT9M111_COLORPIPE;
 584         m5602_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
 585         for (address = 0; address < 0xff; address++) {
 586                 m5602_read_sensor(sd, address, value, 2);
 587                 pr_info("register 0x%x contains 0x%x%x\n",
 588                         address, value[0], value[1]);
 589         }
 590
 591         pr_info("Dumping the mt9m111 camera control registers\n");
 592         value[1] = MT9M111_CAMERA_CONTROL;
 593         m5602_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
 594         for (address = 0; address < 0xff; address++) {
 595                 m5602_read_sensor(sd, address, value, 2);
 596                 pr_info("register 0x%x contains 0x%x%x\n",
 597                         address, value[0], value[1]);
 598         }
 599
 600         pr_info("mt9m111 register state dump complete\n");
 601 }