1 /* 2 * Driver for the po1030 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_po1030.h" 22 23 static int po1030_s_ctrl(struct v4l2_ctrl *ctrl); 24 static void po1030_dump_registers(struct sd *sd); 25 26 static const unsigned char preinit_po1030[][3] = { 27 {BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02}, 28 {BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0}, 29 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 30 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 31 {BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, 32 {BRIDGE, M5602_XB_SENSOR_CTRL, 0x00}, 33 {BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, 34 {BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, 35 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 36 {BRIDGE, M5602_XB_GPIO_DAT, 0x04}, 37 {BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, 38 {BRIDGE, M5602_XB_GPIO_DIR_H, 0x06}, 39 {BRIDGE, M5602_XB_GPIO_DAT_H, 0x02}, 40 41 {SENSOR, PO1030_AUTOCTRL2, PO1030_SENSOR_RESET | (1 << 2)}, 42 43 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x04}, 44 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 45 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 46 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 47 {BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, 48 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 49 {BRIDGE, M5602_XB_GPIO_DAT, 0x00} 50 }; 51 52 static const unsigned char init_po1030[][3] = { 53 {BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02}, 54 {BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0}, 55 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 56 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 57 {BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, 58 {BRIDGE, M5602_XB_SENSOR_CTRL, 0x00}, 59 {BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, 60 61 {SENSOR, PO1030_AUTOCTRL2, PO1030_SENSOR_RESET | (1 << 2)}, 62 63 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 64 {BRIDGE, M5602_XB_GPIO_DAT, 0x04}, 65 {BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, 66 {BRIDGE, M5602_XB_GPIO_EN_L, 0x00}, 67 {BRIDGE, M5602_XB_GPIO_DIR_H, 0x06}, 68 {BRIDGE, M5602_XB_GPIO_DAT_H, 0x02}, 69 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x04}, 70 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 71 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 72 {BRIDGE, M5602_XB_GPIO_DAT, 0x00}, 73 74 {SENSOR, PO1030_AUTOCTRL2, 0x04}, 75 76 {SENSOR, PO1030_OUTFORMCTRL2, PO1030_RAW_RGB_BAYER}, 77 {SENSOR, PO1030_AUTOCTRL1, PO1030_WEIGHT_WIN_2X}, 78 79 {SENSOR, PO1030_CONTROL2, 0x03}, 80 {SENSOR, 0x21, 0x90}, 81 {SENSOR, PO1030_YTARGET, 0x60}, 82 {SENSOR, 0x59, 0x13}, 83 {SENSOR, PO1030_OUTFORMCTRL1, PO1030_HREF_ENABLE}, 84 {SENSOR, PO1030_EDGE_ENH_OFF, 0x00}, 85 {SENSOR, PO1030_EGA, 0x80}, 86 {SENSOR, 0x78, 0x14}, 87 {SENSOR, 0x6f, 0x01}, 88 {SENSOR, PO1030_GLOBALGAINMAX, 0x14}, 89 {SENSOR, PO1030_Cb_U_GAIN, 0x38}, 90 {SENSOR, PO1030_Cr_V_GAIN, 0x38}, 91 {SENSOR, PO1030_CONTROL1, PO1030_SHUTTER_MODE | 92 PO1030_AUTO_SUBSAMPLING | 93 PO1030_FRAME_EQUAL}, 94 {SENSOR, PO1030_GC0, 0x10}, 95 {SENSOR, PO1030_GC1, 0x20}, 96 {SENSOR, PO1030_GC2, 0x40}, 97 {SENSOR, PO1030_GC3, 0x60}, 98 {SENSOR, PO1030_GC4, 0x80}, 99 {SENSOR, PO1030_GC5, 0xa0}, 100 {SENSOR, PO1030_GC6, 0xc0}, 101 {SENSOR, PO1030_GC7, 0xff}, 102 103 /* Set the width to 751 */ 104 {SENSOR, PO1030_FRAMEWIDTH_H, 0x02}, 105 {SENSOR, PO1030_FRAMEWIDTH_L, 0xef}, 106 107 /* Set the height to 540 */ 108 {SENSOR, PO1030_FRAMEHEIGHT_H, 0x02}, 109 {SENSOR, PO1030_FRAMEHEIGHT_L, 0x1c}, 110 111 /* Set the x window to 1 */ 112 {SENSOR, PO1030_WINDOWX_H, 0x00}, 113 {SENSOR, PO1030_WINDOWX_L, 0x01}, 114 115 /* Set the y window to 1 */ 116 {SENSOR, PO1030_WINDOWY_H, 0x00}, 117 {SENSOR, PO1030_WINDOWY_L, 0x01}, 118 119 /* with a very low lighted environment increase the exposure but 120 * decrease the FPS (Frame Per Second) */ 121 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 122 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 123 124 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 125 {BRIDGE, M5602_XB_GPIO_DAT, 0x00}, 126 {BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, 127 {BRIDGE, M5602_XB_GPIO_EN_L, 0x00}, 128 }; 129 130 static struct v4l2_pix_format po1030_modes[] = { 131 { 132 640, 133 480, 134 V4L2_PIX_FMT_SBGGR8, 135 V4L2_FIELD_NONE, 136 .sizeimage = 640 * 480, 137 .bytesperline = 640, 138 .colorspace = V4L2_COLORSPACE_SRGB, 139 .priv = 2 140 } 141 }; 142 143 static const struct v4l2_ctrl_ops po1030_ctrl_ops = { 144 .s_ctrl = po1030_s_ctrl, 145 }; 146 147 static const struct v4l2_ctrl_config po1030_greenbal_cfg = { 148 .ops = &po1030_ctrl_ops, 149 .id = M5602_V4L2_CID_GREEN_BALANCE, 150 .name = "Green Balance", 151 .type = V4L2_CTRL_TYPE_INTEGER, 152 .min = 0, 153 .max = 255, 154 .step = 1, 155 .def = PO1030_GREEN_GAIN_DEFAULT, 156 .flags = V4L2_CTRL_FLAG_SLIDER, 157 }; 158 159 int po1030_probe(struct sd *sd) 160 { 161 u8 dev_id_h = 0, i; 162 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 163 164 if (force_sensor) { 165 if (force_sensor == PO1030_SENSOR) { 166 pr_info("Forcing a %s sensor\n", po1030.name); 167 goto sensor_found; 168 } 169 /* If we want to force another sensor, don't try to probe this 170 * one */ 171 return -ENODEV; 172 } 173 174 PDEBUG(D_PROBE, "Probing for a po1030 sensor"); 175 176 /* Run the pre-init to actually probe the unit */ 177 for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) { 178 u8 data = preinit_po1030[i][2]; 179 if (preinit_po1030[i][0] == SENSOR) 180 m5602_write_sensor(sd, 181 preinit_po1030[i][1], &data, 1); 182 else 183 m5602_write_bridge(sd, preinit_po1030[i][1], data); 184 } 185 186 if (m5602_read_sensor(sd, PO1030_DEVID_H, &dev_id_h, 1)) 187 return -ENODEV; 188 189 if (dev_id_h == 0x30) { 190 pr_info("Detected a po1030 sensor\n"); 191 goto sensor_found; 192 } 193 return -ENODEV; 194 195 sensor_found: 196 sd->gspca_dev.cam.cam_mode = po1030_modes; 197 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(po1030_modes); 198 199 return 0; 200 } 201 202 int po1030_init(struct sd *sd) 203 { 204 int i, err = 0; 205 206 /* Init the sensor */ 207 for (i = 0; i < ARRAY_SIZE(init_po1030) && !err; i++) { 208 u8 data[2] = {0x00, 0x00}; 209 210 switch (init_po1030[i][0]) { 211 case BRIDGE: 212 err = m5602_write_bridge(sd, 213 init_po1030[i][1], 214 init_po1030[i][2]); 215 break; 216 217 case SENSOR: 218 data[0] = init_po1030[i][2]; 219 err = m5602_write_sensor(sd, 220 init_po1030[i][1], data, 1); 221 break; 222 223 default: 224 pr_info("Invalid stream command, exiting init\n"); 225 return -EINVAL; 226 } 227 } 228 if (err < 0) 229 return err; 230 231 if (dump_sensor) 232 po1030_dump_registers(sd); 233 234 return 0; 235 } 236 237 int po1030_init_controls(struct sd *sd) 238 { 239 struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler; 240 241 sd->gspca_dev.vdev.ctrl_handler = hdl; 242 v4l2_ctrl_handler_init(hdl, 9); 243 244 sd->auto_white_bal = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, 245 V4L2_CID_AUTO_WHITE_BALANCE, 246 0, 1, 1, 0); 247 sd->green_bal = v4l2_ctrl_new_custom(hdl, &po1030_greenbal_cfg, NULL); 248 sd->red_bal = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, 249 V4L2_CID_RED_BALANCE, 0, 255, 1, 250 PO1030_RED_GAIN_DEFAULT); 251 sd->blue_bal = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, 252 V4L2_CID_BLUE_BALANCE, 0, 255, 1, 253 PO1030_BLUE_GAIN_DEFAULT); 254 255 sd->autoexpo = v4l2_ctrl_new_std_menu(hdl, &po1030_ctrl_ops, 256 V4L2_CID_EXPOSURE_AUTO, 1, 0, V4L2_EXPOSURE_MANUAL); 257 sd->expo = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_EXPOSURE, 258 0, 0x2ff, 1, PO1030_EXPOSURE_DEFAULT); 259 260 sd->gain = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_GAIN, 0, 261 0x4f, 1, PO1030_GLOBAL_GAIN_DEFAULT); 262 263 sd->hflip = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_HFLIP, 264 0, 1, 1, 0); 265 sd->vflip = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_VFLIP, 266 0, 1, 1, 0); 267 268 if (hdl->error) { 269 pr_err("Could not initialize controls\n"); 270 return hdl->error; 271 } 272 273 v4l2_ctrl_auto_cluster(4, &sd->auto_white_bal, 0, false); 274 v4l2_ctrl_auto_cluster(2, &sd->autoexpo, 0, false); 275 v4l2_ctrl_cluster(2, &sd->hflip); 276 277 return 0; 278 } 279 280 int po1030_start(struct sd *sd) 281 { 282 struct cam *cam = &sd->gspca_dev.cam; 283 int i, err = 0; 284 int width = cam->cam_mode[sd->gspca_dev.curr_mode].width; 285 int height = cam->cam_mode[sd->gspca_dev.curr_mode].height; 286 int ver_offs = cam->cam_mode[sd->gspca_dev.curr_mode].priv; 287 u8 data; 288 289 switch (width) { 290 case 320: 291 data = PO1030_SUBSAMPLING; 292 err = m5602_write_sensor(sd, PO1030_CONTROL3, &data, 1); 293 if (err < 0) 294 return err; 295 296 data = ((width + 3) >> 8) & 0xff; 297 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_H, &data, 1); 298 if (err < 0) 299 return err; 300 301 data = (width + 3) & 0xff; 302 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_L, &data, 1); 303 if (err < 0) 304 return err; 305 306 data = ((height + 1) >> 8) & 0xff; 307 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_H, &data, 1); 308 if (err < 0) 309 return err; 310 311 data = (height + 1) & 0xff; 312 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_L, &data, 1); 313 314 height += 6; 315 width -= 1; 316 break; 317 318 case 640: 319 data = 0; 320 err = m5602_write_sensor(sd, PO1030_CONTROL3, &data, 1); 321 if (err < 0) 322 return err; 323 324 data = ((width + 7) >> 8) & 0xff; 325 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_H, &data, 1); 326 if (err < 0) 327 return err; 328 329 data = (width + 7) & 0xff; 330 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_L, &data, 1); 331 if (err < 0) 332 return err; 333 334 data = ((height + 3) >> 8) & 0xff; 335 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_H, &data, 1); 336 if (err < 0) 337 return err; 338 339 data = (height + 3) & 0xff; 340 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_L, &data, 1); 341 342 height += 12; 343 width -= 2; 344 break; 345 } 346 err = m5602_write_bridge(sd, M5602_XB_SENSOR_TYPE, 0x0c); 347 if (err < 0) 348 return err; 349 350 err = m5602_write_bridge(sd, M5602_XB_LINE_OF_FRAME_H, 0x81); 351 if (err < 0) 352 return err; 353 354 err = m5602_write_bridge(sd, M5602_XB_PIX_OF_LINE_H, 0x82); 355 if (err < 0) 356 return err; 357 358 err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0x01); 359 if (err < 0) 360 return err; 361 362 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 363 ((ver_offs >> 8) & 0xff)); 364 if (err < 0) 365 return err; 366 367 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (ver_offs & 0xff)); 368 if (err < 0) 369 return err; 370 371 for (i = 0; i < 2 && !err; i++) 372 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0); 373 if (err < 0) 374 return err; 375 376 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height >> 8) & 0xff); 377 if (err < 0) 378 return err; 379 380 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height & 0xff)); 381 if (err < 0) 382 return err; 383 384 for (i = 0; i < 2 && !err; i++) 385 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0); 386 387 for (i = 0; i < 2 && !err; i++) 388 err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0); 389 390 for (i = 0; i < 2 && !err; i++) 391 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, 0); 392 if (err < 0) 393 return err; 394 395 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, (width >> 8) & 0xff); 396 if (err < 0) 397 return err; 398 399 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, (width & 0xff)); 400 if (err < 0) 401 return err; 402 403 err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0); 404 return err; 405 } 406 407 static int po1030_set_exposure(struct gspca_dev *gspca_dev, __s32 val) 408 { 409 struct sd *sd = (struct sd *) gspca_dev; 410 u8 i2c_data; 411 int err; 412 413 PDEBUG(D_CONF, "Set exposure to %d", val & 0xffff); 414 415 i2c_data = ((val & 0xff00) >> 8); 416 PDEBUG(D_CONF, "Set exposure to high byte to 0x%x", 417 i2c_data); 418 419 err = m5602_write_sensor(sd, PO1030_INTEGLINES_H, 420 &i2c_data, 1); 421 if (err < 0) 422 return err; 423 424 i2c_data = (val & 0xff); 425 PDEBUG(D_CONF, "Set exposure to low byte to 0x%x", 426 i2c_data); 427 err = m5602_write_sensor(sd, PO1030_INTEGLINES_M, 428 &i2c_data, 1); 429 430 return err; 431 } 432 433 static int po1030_set_gain(struct gspca_dev *gspca_dev, __s32 val) 434 { 435 struct sd *sd = (struct sd *) gspca_dev; 436 u8 i2c_data; 437 int err; 438 439 i2c_data = val & 0xff; 440 PDEBUG(D_CONF, "Set global gain to %d", i2c_data); 441 err = m5602_write_sensor(sd, PO1030_GLOBALGAIN, 442 &i2c_data, 1); 443 return err; 444 } 445 446 static int po1030_set_hvflip(struct gspca_dev *gspca_dev) 447 { 448 struct sd *sd = (struct sd *) gspca_dev; 449 u8 i2c_data; 450 int err; 451 452 PDEBUG(D_CONF, "Set hvflip %d %d", sd->hflip->val, sd->vflip->val); 453 err = m5602_read_sensor(sd, PO1030_CONTROL2, &i2c_data, 1); 454 if (err < 0) 455 return err; 456 457 i2c_data = (0x3f & i2c_data) | (sd->hflip->val << 7) | 458 (sd->vflip->val << 6); 459 460 err = m5602_write_sensor(sd, PO1030_CONTROL2, 461 &i2c_data, 1); 462 463 return err; 464 } 465 466 static int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val) 467 { 468 struct sd *sd = (struct sd *) gspca_dev; 469 u8 i2c_data; 470 int err; 471 472 i2c_data = val & 0xff; 473 PDEBUG(D_CONF, "Set red gain to %d", i2c_data); 474 err = m5602_write_sensor(sd, PO1030_RED_GAIN, 475 &i2c_data, 1); 476 return err; 477 } 478 479 static int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val) 480 { 481 struct sd *sd = (struct sd *) gspca_dev; 482 u8 i2c_data; 483 int err; 484 485 i2c_data = val & 0xff; 486 PDEBUG(D_CONF, "Set blue gain to %d", i2c_data); 487 err = m5602_write_sensor(sd, PO1030_BLUE_GAIN, 488 &i2c_data, 1); 489 490 return err; 491 } 492 493 static int po1030_set_green_balance(struct gspca_dev *gspca_dev, __s32 val) 494 { 495 struct sd *sd = (struct sd *) gspca_dev; 496 u8 i2c_data; 497 int err; 498 499 i2c_data = val & 0xff; 500 PDEBUG(D_CONF, "Set green gain to %d", i2c_data); 501 502 err = m5602_write_sensor(sd, PO1030_GREEN_1_GAIN, 503 &i2c_data, 1); 504 if (err < 0) 505 return err; 506 507 return m5602_write_sensor(sd, PO1030_GREEN_2_GAIN, 508 &i2c_data, 1); 509 } 510 511 static int po1030_set_auto_white_balance(struct gspca_dev *gspca_dev, 512 __s32 val) 513 { 514 struct sd *sd = (struct sd *) gspca_dev; 515 u8 i2c_data; 516 int err; 517 518 err = m5602_read_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 519 if (err < 0) 520 return err; 521 522 PDEBUG(D_CONF, "Set auto white balance to %d", val); 523 i2c_data = (i2c_data & 0xfe) | (val & 0x01); 524 err = m5602_write_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 525 return err; 526 } 527 528 static int po1030_set_auto_exposure(struct gspca_dev *gspca_dev, 529 __s32 val) 530 { 531 struct sd *sd = (struct sd *) gspca_dev; 532 u8 i2c_data; 533 int err; 534 535 err = m5602_read_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 536 if (err < 0) 537 return err; 538 539 PDEBUG(D_CONF, "Set auto exposure to %d", val); 540 val = (val == V4L2_EXPOSURE_AUTO); 541 i2c_data = (i2c_data & 0xfd) | ((val & 0x01) << 1); 542 return m5602_write_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 543 } 544 545 void po1030_disconnect(struct sd *sd) 546 { 547 sd->sensor = NULL; 548 } 549 550 static int po1030_s_ctrl(struct v4l2_ctrl *ctrl) 551 { 552 struct gspca_dev *gspca_dev = 553 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 554 struct sd *sd = (struct sd *) gspca_dev; 555 int err; 556 557 if (!gspca_dev->streaming) 558 return 0; 559 560 switch (ctrl->id) { 561 case V4L2_CID_AUTO_WHITE_BALANCE: 562 err = po1030_set_auto_white_balance(gspca_dev, ctrl->val); 563 if (err || ctrl->val) 564 return err; 565 err = po1030_set_green_balance(gspca_dev, sd->green_bal->val); 566 if (err) 567 return err; 568 err = po1030_set_red_balance(gspca_dev, sd->red_bal->val); 569 if (err) 570 return err; 571 err = po1030_set_blue_balance(gspca_dev, sd->blue_bal->val); 572 break; 573 case V4L2_CID_EXPOSURE_AUTO: 574 err = po1030_set_auto_exposure(gspca_dev, ctrl->val); 575 if (err || ctrl->val == V4L2_EXPOSURE_AUTO) 576 return err; 577 err = po1030_set_exposure(gspca_dev, sd->expo->val); 578 break; 579 case V4L2_CID_GAIN: 580 err = po1030_set_gain(gspca_dev, ctrl->val); 581 break; 582 case V4L2_CID_HFLIP: 583 err = po1030_set_hvflip(gspca_dev); 584 break; 585 default: 586 return -EINVAL; 587 } 588 589 return err; 590 } 591 592 static void po1030_dump_registers(struct sd *sd) 593 { 594 int address; 595 u8 value = 0; 596 597 pr_info("Dumping the po1030 sensor core registers\n"); 598 for (address = 0; address < 0x7f; address++) { 599 m5602_read_sensor(sd, address, &value, 1); 600 pr_info("register 0x%x contains 0x%x\n", address, value); 601 } 602 603 pr_info("po1030 register state dump complete\n"); 604 605 pr_info("Probing for which registers that are read/write\n"); 606 for (address = 0; address < 0xff; address++) { 607 u8 old_value, ctrl_value; 608 u8 test_value[2] = {0xff, 0xff}; 609 610 m5602_read_sensor(sd, address, &old_value, 1); 611 m5602_write_sensor(sd, address, test_value, 1); 612 m5602_read_sensor(sd, address, &ctrl_value, 1); 613 614 if (ctrl_value == test_value[0]) 615 pr_info("register 0x%x is writeable\n", address); 616 else 617 pr_info("register 0x%x is read only\n", address); 618 619 /* Restore original value */ 620 m5602_write_sensor(sd, address, &old_value, 1); 621 } 622 } 623