kernel/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 struct v4l2_pix_format mt9m111_modes[] = {
  27         {
  28                 640,
  29                 480,
  30                 V4L2_PIX_FMT_SBGGR8,
  31                 V4L2_FIELD_NONE,
  32                 .sizeimage = 640 * 480,
  33                 .bytesperline = 640,
  34                 .colorspace = V4L2_COLORSPACE_SRGB,
  35                 .priv = 0
  36         }
  37 };
  38
  39 static const struct v4l2_ctrl_ops mt9m111_ctrl_ops = {
  40         .s_ctrl = mt9m111_s_ctrl,
  41 };
  42
  43 static const struct v4l2_ctrl_config mt9m111_greenbal_cfg = {
  44         .ops    = &mt9m111_ctrl_ops,
  45         .id     = M5602_V4L2_CID_GREEN_BALANCE,
  46         .name   = "Green Balance",
  47         .type   = V4L2_CTRL_TYPE_INTEGER,
  48         .min    = 0,
  49         .max    = 0x7ff,
  50         .step   = 1,
  51         .def    = MT9M111_GREEN_GAIN_DEFAULT,
  52         .flags  = V4L2_CTRL_FLAG_SLIDER,
  53 };
  54
  55 int mt9m111_probe(struct sd *sd)
  56 {
  57         u8 data[2] = {0x00, 0x00};
  58         int i;
  59         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
  60
  61         if (force_sensor) {
  62                 if (force_sensor == MT9M111_SENSOR) {
  63                         pr_info("Forcing a %s sensor\n", mt9m111.name);
  64                         goto sensor_found;
  65                 }
  66                 /* If we want to force another sensor, don't try to probe this
  67                  * one */
  68                 return -ENODEV;
  69         }
  70
  71         PDEBUG(D_PROBE, "Probing for a mt9m111 sensor");
  72
  73         /* Do the preinit */
  74         for (i = 0; i < ARRAY_SIZE(preinit_mt9m111); i++) {
  75                 if (preinit_mt9m111[i][0] == BRIDGE) {
  76                         m5602_write_bridge(sd,
  77                                 preinit_mt9m111[i][1],
  78                                 preinit_mt9m111[i][2]);
  79                 } else {
  80                         data[0] = preinit_mt9m111[i][2];
  81                         data[1] = preinit_mt9m111[i][3];
  82                         m5602_write_sensor(sd,
  83                                 preinit_mt9m111[i][1], data, 2);
  84                 }
  85         }
  86
  87         if (m5602_read_sensor(sd, MT9M111_SC_CHIPVER, data, 2))
  88                 return -ENODEV;
  89
  90         if ((data[0] == 0x14) && (data[1] == 0x3a)) {
  91                 pr_info("Detected a mt9m111 sensor\n");
  92                 goto sensor_found;
  93         }
  94
  95         return -ENODEV;
  96
  97 sensor_found:
  98         sd->gspca_dev.cam.cam_mode = mt9m111_modes;
  99         sd->gspca_dev.cam.nmodes = ARRAY_SIZE(mt9m111_modes);
 100
 101         return 0;
 102 }
 103
 104 int mt9m111_init(struct sd *sd)
 105 {
 106         int i, err = 0;
 107
 108         /* Init the sensor */
 109         for (i = 0; i < ARRAY_SIZE(init_mt9m111) && !err; i++) {
 110                 u8 data[2];
 111
 112                 if (init_mt9m111[i][0] == BRIDGE) {
 113                         err = m5602_write_bridge(sd,
 114                                 init_mt9m111[i][1],
 115                                 init_mt9m111[i][2]);
 116                 } else {
 117                         data[0] = init_mt9m111[i][2];
 118                         data[1] = init_mt9m111[i][3];
 119                         err = m5602_write_sensor(sd,
 120                                 init_mt9m111[i][1], data, 2);
 121                 }
 122         }
 123
 124         if (dump_sensor)
 125                 mt9m111_dump_registers(sd);
 126
 127         return 0;
 128 }
 129
 130 int mt9m111_init_controls(struct sd *sd)
 131 {
 132         struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
 133
 134         sd->gspca_dev.vdev.ctrl_handler = hdl;
 135         v4l2_ctrl_handler_init(hdl, 7);
 136
 137         sd->auto_white_bal = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops,
 138                                                V4L2_CID_AUTO_WHITE_BALANCE,
 139                                                0, 1, 1, 0);
 140         sd->green_bal = v4l2_ctrl_new_custom(hdl, &mt9m111_greenbal_cfg, NULL);
 141         sd->red_bal = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops,
 142                                         V4L2_CID_RED_BALANCE, 0, 0x7ff, 1,
 143                                         MT9M111_RED_GAIN_DEFAULT);
 144         sd->blue_bal = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops,
 145                                         V4L2_CID_BLUE_BALANCE, 0, 0x7ff, 1,
 146                                         MT9M111_BLUE_GAIN_DEFAULT);
 147
 148         v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops, V4L2_CID_GAIN, 0,
 149                           (INITIAL_MAX_GAIN - 1) * 2 * 2 * 2, 1,
 150                           MT9M111_DEFAULT_GAIN);
 151
 152         sd->hflip = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops, V4L2_CID_HFLIP,
 153                                       0, 1, 1, 0);
 154         sd->vflip = v4l2_ctrl_new_std(hdl, &mt9m111_ctrl_ops, V4L2_CID_VFLIP,
 155                                       0, 1, 1, 0);
 156
 157         if (hdl->error) {
 158                 pr_err("Could not initialize controls\n");
 159                 return hdl->error;
 160         }
 161
 162         v4l2_ctrl_auto_cluster(4, &sd->auto_white_bal, 0, false);
 163         v4l2_ctrl_cluster(2, &sd->hflip);
 164
 165         return 0;
 166 }
 167
 168 int mt9m111_start(struct sd *sd)
 169 {
 170         int i, err = 0;
 171         u8 data[2];
 172         struct cam *cam = &sd->gspca_dev.cam;
 173         struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
 174
 175         int width = cam->cam_mode[sd->gspca_dev.curr_mode].width - 1;
 176         int height = cam->cam_mode[sd->gspca_dev.curr_mode].height;
 177
 178         for (i = 0; i < ARRAY_SIZE(start_mt9m111) && !err; i++) {
 179                 if (start_mt9m111[i][0] == BRIDGE) {
 180                         err = m5602_write_bridge(sd,
 181                                 start_mt9m111[i][1],
 182                                 start_mt9m111[i][2]);
 183                 } else {
 184                         data[0] = start_mt9m111[i][2];
 185                         data[1] = start_mt9m111[i][3];
 186                         err = m5602_write_sensor(sd,
 187                                 start_mt9m111[i][1], data, 2);
 188                 }
 189         }
 190         if (err < 0)
 191                 return err;
 192
 193         err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height >> 8) & 0xff);
 194         if (err < 0)
 195                 return err;
 196
 197         err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height & 0xff));
 198         if (err < 0)
 199                 return err;
 200
 201         for (i = 0; i < 2 && !err; i++)
 202                 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0);
 203         if (err < 0)
 204                 return err;
 205
 206         err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0);
 207         if (err < 0)
 208                 return err;
 209
 210         err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 2);
 211         if (err < 0)
 212                 return err;
 213
 214         for (i = 0; i < 2 && !err; i++)
 215                 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, 0);
 216         if (err < 0)
 217                 return err;
 218
 219         err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA,
 220                                  (width >> 8) & 0xff);
 221         if (err < 0)
 222                 return err;
 223
 224         err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, width & 0xff);
 225         if (err < 0)
 226                 return err;
 227
 228         err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0);
 229         if (err < 0)
 230                 return err;
 231
 232         switch (width) {
 233         case 640:
 234                 PDEBUG(D_CONF, "Configuring camera for VGA mode");
 235                 break;
 236
 237         case 320:
 238                 PDEBUG(D_CONF, "Configuring camera for QVGA mode");
 239                 break;
 240         }
 241         return err;
 242 }
 243
 244 void mt9m111_disconnect(struct sd *sd)
 245 {
 246         sd->sensor = NULL;
 247 }
 248
 249 static int mt9m111_set_hvflip(struct gspca_dev *gspca_dev)
 250 {
 251         int err;
 252         u8 data[2] = {0x00, 0x00};
 253         struct sd *sd = (struct sd *) gspca_dev;
 254         int hflip;
 255         int vflip;
 256
 257         PDEBUG(D_CONF, "Set hvflip to %d %d", sd->hflip->val, sd->vflip->val);
 258
 259         /* The mt9m111 is flipped by default */
 260         hflip = !sd->hflip->val;
 261         vflip = !sd->vflip->val;
 262
 263         /* Set the correct page map */
 264         err = m5602_write_sensor(sd, MT9M111_PAGE_MAP, data, 2);
 265         if (err < 0)
 266                 return err;
 267
 268         data[0] = MT9M111_RMB_OVER_SIZED;
 269         if (gspca_dev->pixfmt.width == 640) {
 270                 data[1] = MT9M111_RMB_ROW_SKIP_2X |
 271                           MT9M111_RMB_COLUMN_SKIP_2X |
 272                           (hflip << 1) | vflip;
 273         } else {
 274                 data[1] = MT9M111_RMB_ROW_SKIP_4X |
 275                           MT9M111_RMB_COLUMN_SKIP_4X |
 276                           (hflip << 1) | vflip;
 277         }
 278         err = m5602_write_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B,
 279                                         data, 2);
 280         return err;
 281 }
 282
 283 static int mt9m111_set_auto_white_balance(struct gspca_dev *gspca_dev,
 284                                           __s32 val)
 285 {
 286         struct sd *sd = (struct sd *) gspca_dev;
 287         int err;
 288         u8 data[2];
 289
 290         err = m5602_read_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
 291         if (err < 0)
 292                 return err;
 293
 294         data[1] = ((data[1] & 0xfd) | ((val & 0x01) << 1));
 295
 296         err = m5602_write_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
 297
 298         PDEBUG(D_CONF, "Set auto white balance %d", val);
 299         return err;
 300 }
 301
 302 static int mt9m111_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 303 {
 304         int err, tmp;
 305         u8 data[2] = {0x00, 0x00};
 306         struct sd *sd = (struct sd *) gspca_dev;
 307
 308         /* Set the correct page map */
 309         err = m5602_write_sensor(sd, MT9M111_PAGE_MAP, data, 2);
 310         if (err < 0)
 311                 return err;
 312
 313         if (val >= INITIAL_MAX_GAIN * 2 * 2 * 2)
 314                 return -EINVAL;
 315
 316         if ((val >= INITIAL_MAX_GAIN * 2 * 2) &&
 317             (val < (INITIAL_MAX_GAIN - 1) * 2 * 2 * 2))
 318                 tmp = (1 << 10) | (val << 9) |
 319                                 (val << 8) | (val / 8);
 320         else if ((val >= INITIAL_MAX_GAIN * 2) &&
 321                  (val <  INITIAL_MAX_GAIN * 2 * 2))
 322                 tmp = (1 << 9) | (1 << 8) | (val / 4);
 323         else if ((val >= INITIAL_MAX_GAIN) &&
 324                  (val < INITIAL_MAX_GAIN * 2))
 325                 tmp = (1 << 8) | (val / 2);
 326         else
 327                 tmp = val;
 328
 329         data[1] = (tmp & 0xff);
 330         data[0] = (tmp & 0xff00) >> 8;
 331         PDEBUG(D_CONF, "tmp=%d, data[1]=%d, data[0]=%d", tmp,
 332                data[1], data[0]);
 333
 334         err = m5602_write_sensor(sd, MT9M111_SC_GLOBAL_GAIN,
 335                                    data, 2);
 336
 337         return err;
 338 }
 339
 340 static int mt9m111_set_green_balance(struct gspca_dev *gspca_dev, __s32 val)
 341 {
 342         int err;
 343         u8 data[2];
 344         struct sd *sd = (struct sd *) gspca_dev;
 345
 346         data[1] = (val & 0xff);
 347         data[0] = (val & 0xff00) >> 8;
 348
 349         PDEBUG(D_CONF, "Set green balance %d", val);
 350         err = m5602_write_sensor(sd, MT9M111_SC_GREEN_1_GAIN,
 351                                  data, 2);
 352         if (err < 0)
 353                 return err;
 354
 355         return m5602_write_sensor(sd, MT9M111_SC_GREEN_2_GAIN,
 356                                   data, 2);
 357 }
 358
 359 static int mt9m111_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
 360 {
 361         u8 data[2];
 362         struct sd *sd = (struct sd *) gspca_dev;
 363
 364         data[1] = (val & 0xff);
 365         data[0] = (val & 0xff00) >> 8;
 366
 367         PDEBUG(D_CONF, "Set blue balance %d", val);
 368
 369         return m5602_write_sensor(sd, MT9M111_SC_BLUE_GAIN,
 370                                   data, 2);
 371 }
 372
 373 static int mt9m111_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
 374 {
 375         u8 data[2];
 376         struct sd *sd = (struct sd *) gspca_dev;
 377
 378         data[1] = (val & 0xff);
 379         data[0] = (val & 0xff00) >> 8;
 380
 381         PDEBUG(D_CONF, "Set red balance %d", val);
 382
 383         return m5602_write_sensor(sd, MT9M111_SC_RED_GAIN,
 384                                   data, 2);
 385 }
 386
 387 static int mt9m111_s_ctrl(struct v4l2_ctrl *ctrl)
 388 {
 389         struct gspca_dev *gspca_dev =
 390                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 391         struct sd *sd = (struct sd *) gspca_dev;
 392         int err;
 393
 394         if (!gspca_dev->streaming)
 395                 return 0;
 396
 397         switch (ctrl->id) {
 398         case V4L2_CID_AUTO_WHITE_BALANCE:
 399                 err = mt9m111_set_auto_white_balance(gspca_dev, ctrl->val);
 400                 if (err || ctrl->val)
 401                         return err;
 402                 err = mt9m111_set_green_balance(gspca_dev, sd->green_bal->val);
 403                 if (err)
 404                         return err;
 405                 err = mt9m111_set_red_balance(gspca_dev, sd->red_bal->val);
 406                 if (err)
 407                         return err;
 408                 err = mt9m111_set_blue_balance(gspca_dev, sd->blue_bal->val);
 409                 break;
 410         case V4L2_CID_GAIN:
 411                 err = mt9m111_set_gain(gspca_dev, ctrl->val);
 412                 break;
 413         case V4L2_CID_HFLIP:
 414                 err = mt9m111_set_hvflip(gspca_dev);
 415                 break;
 416         default:
 417                 return -EINVAL;
 418         }
 419
 420         return err;
 421 }
 422
 423 static void mt9m111_dump_registers(struct sd *sd)
 424 {
 425         u8 address, value[2] = {0x00, 0x00};
 426
 427         pr_info("Dumping the mt9m111 register state\n");
 428
 429         pr_info("Dumping the mt9m111 sensor core registers\n");
 430         value[1] = MT9M111_SENSOR_CORE;
 431         m5602_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
 432         for (address = 0; address < 0xff; address++) {
 433                 m5602_read_sensor(sd, address, value, 2);
 434                 pr_info("register 0x%x contains 0x%x%x\n",
 435                         address, value[0], value[1]);
 436         }
 437
 438         pr_info("Dumping the mt9m111 color pipeline registers\n");
 439         value[1] = MT9M111_COLORPIPE;
 440         m5602_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
 441         for (address = 0; address < 0xff; address++) {
 442                 m5602_read_sensor(sd, address, value, 2);
 443                 pr_info("register 0x%x contains 0x%x%x\n",
 444                         address, value[0], value[1]);
 445         }
 446
 447         pr_info("Dumping the mt9m111 camera control registers\n");
 448         value[1] = MT9M111_CAMERA_CONTROL;
 449         m5602_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
 450         for (address = 0; address < 0xff; address++) {
 451                 m5602_read_sensor(sd, address, value, 2);
 452                 pr_info("register 0x%x contains 0x%x%x\n",
 453                         address, value[0], value[1]);
 454         }
 455
 456         pr_info("mt9m111 register state dump complete\n");
 457 }