1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for the po1030 sensor 4 * 5 * Copyright (c) 2008 Erik Andrén 6 * Copyright (c) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project. 7 * Copyright (c) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br> 8 * 9 * Portions of code to USB interface and ALi driver software, 10 * Copyright (c) 2006 Willem Duinker 11 * v4l2 interface modeled after the V4L2 driver 12 * for SN9C10x PC Camera Controllers 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include "m5602_po1030.h" 18 19 static int po1030_s_ctrl(struct v4l2_ctrl *ctrl); 20 static void po1030_dump_registers(struct sd *sd); 21 22 static const unsigned char preinit_po1030[][3] = { 23 {BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02}, 24 {BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0}, 25 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 26 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 27 {BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, 28 {BRIDGE, M5602_XB_SENSOR_CTRL, 0x00}, 29 {BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, 30 {BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, 31 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 32 {BRIDGE, M5602_XB_GPIO_DAT, 0x04}, 33 {BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, 34 {BRIDGE, M5602_XB_GPIO_DIR_H, 0x06}, 35 {BRIDGE, M5602_XB_GPIO_DAT_H, 0x02}, 36 37 {SENSOR, PO1030_AUTOCTRL2, PO1030_SENSOR_RESET | (1 << 2)}, 38 39 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x04}, 40 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 41 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 42 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 43 {BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, 44 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 45 {BRIDGE, M5602_XB_GPIO_DAT, 0x00} 46 }; 47 48 static const unsigned char init_po1030[][3] = { 49 {BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02}, 50 {BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0}, 51 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 52 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 53 {BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, 54 {BRIDGE, M5602_XB_SENSOR_CTRL, 0x00}, 55 {BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, 56 57 {SENSOR, PO1030_AUTOCTRL2, PO1030_SENSOR_RESET | (1 << 2)}, 58 59 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 60 {BRIDGE, M5602_XB_GPIO_DAT, 0x04}, 61 {BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, 62 {BRIDGE, M5602_XB_GPIO_EN_L, 0x00}, 63 {BRIDGE, M5602_XB_GPIO_DIR_H, 0x06}, 64 {BRIDGE, M5602_XB_GPIO_DAT_H, 0x02}, 65 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x04}, 66 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 67 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 68 {BRIDGE, M5602_XB_GPIO_DAT, 0x00}, 69 70 {SENSOR, PO1030_AUTOCTRL2, 0x04}, 71 72 {SENSOR, PO1030_OUTFORMCTRL2, PO1030_RAW_RGB_BAYER}, 73 {SENSOR, PO1030_AUTOCTRL1, PO1030_WEIGHT_WIN_2X}, 74 75 {SENSOR, PO1030_CONTROL2, 0x03}, 76 {SENSOR, 0x21, 0x90}, 77 {SENSOR, PO1030_YTARGET, 0x60}, 78 {SENSOR, 0x59, 0x13}, 79 {SENSOR, PO1030_OUTFORMCTRL1, PO1030_HREF_ENABLE}, 80 {SENSOR, PO1030_EDGE_ENH_OFF, 0x00}, 81 {SENSOR, PO1030_EGA, 0x80}, 82 {SENSOR, 0x78, 0x14}, 83 {SENSOR, 0x6f, 0x01}, 84 {SENSOR, PO1030_GLOBALGAINMAX, 0x14}, 85 {SENSOR, PO1030_Cb_U_GAIN, 0x38}, 86 {SENSOR, PO1030_Cr_V_GAIN, 0x38}, 87 {SENSOR, PO1030_CONTROL1, PO1030_SHUTTER_MODE | 88 PO1030_AUTO_SUBSAMPLING | 89 PO1030_FRAME_EQUAL}, 90 {SENSOR, PO1030_GC0, 0x10}, 91 {SENSOR, PO1030_GC1, 0x20}, 92 {SENSOR, PO1030_GC2, 0x40}, 93 {SENSOR, PO1030_GC3, 0x60}, 94 {SENSOR, PO1030_GC4, 0x80}, 95 {SENSOR, PO1030_GC5, 0xa0}, 96 {SENSOR, PO1030_GC6, 0xc0}, 97 {SENSOR, PO1030_GC7, 0xff}, 98 99 /* Set the width to 751 */ 100 {SENSOR, PO1030_FRAMEWIDTH_H, 0x02}, 101 {SENSOR, PO1030_FRAMEWIDTH_L, 0xef}, 102 103 /* Set the height to 540 */ 104 {SENSOR, PO1030_FRAMEHEIGHT_H, 0x02}, 105 {SENSOR, PO1030_FRAMEHEIGHT_L, 0x1c}, 106 107 /* Set the x window to 1 */ 108 {SENSOR, PO1030_WINDOWX_H, 0x00}, 109 {SENSOR, PO1030_WINDOWX_L, 0x01}, 110 111 /* Set the y window to 1 */ 112 {SENSOR, PO1030_WINDOWY_H, 0x00}, 113 {SENSOR, PO1030_WINDOWY_L, 0x01}, 114 115 /* with a very low lighted environment increase the exposure but 116 * decrease the FPS (Frame Per Second) */ 117 {BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, 118 {BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, 119 120 {BRIDGE, M5602_XB_GPIO_DIR, 0x05}, 121 {BRIDGE, M5602_XB_GPIO_DAT, 0x00}, 122 {BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, 123 {BRIDGE, M5602_XB_GPIO_EN_L, 0x00}, 124 }; 125 126 static struct v4l2_pix_format po1030_modes[] = { 127 { 128 640, 129 480, 130 V4L2_PIX_FMT_SBGGR8, 131 V4L2_FIELD_NONE, 132 .sizeimage = 640 * 480, 133 .bytesperline = 640, 134 .colorspace = V4L2_COLORSPACE_SRGB, 135 .priv = 2 136 } 137 }; 138 139 static const struct v4l2_ctrl_ops po1030_ctrl_ops = { 140 .s_ctrl = po1030_s_ctrl, 141 }; 142 143 static const struct v4l2_ctrl_config po1030_greenbal_cfg = { 144 .ops = &po1030_ctrl_ops, 145 .id = M5602_V4L2_CID_GREEN_BALANCE, 146 .name = "Green Balance", 147 .type = V4L2_CTRL_TYPE_INTEGER, 148 .min = 0, 149 .max = 255, 150 .step = 1, 151 .def = PO1030_GREEN_GAIN_DEFAULT, 152 .flags = V4L2_CTRL_FLAG_SLIDER, 153 }; 154 155 int po1030_probe(struct sd *sd) 156 { 157 u8 dev_id_h = 0, i; 158 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 159 160 if (force_sensor) { 161 if (force_sensor == PO1030_SENSOR) { 162 pr_info("Forcing a %s sensor\n", po1030.name); 163 goto sensor_found; 164 } 165 /* If we want to force another sensor, don't try to probe this 166 * one */ 167 return -ENODEV; 168 } 169 170 gspca_dbg(gspca_dev, D_PROBE, "Probing for a po1030 sensor\n"); 171 172 /* Run the pre-init to actually probe the unit */ 173 for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) { 174 u8 data = preinit_po1030[i][2]; 175 if (preinit_po1030[i][0] == SENSOR) 176 m5602_write_sensor(sd, 177 preinit_po1030[i][1], &data, 1); 178 else 179 m5602_write_bridge(sd, preinit_po1030[i][1], data); 180 } 181 182 if (m5602_read_sensor(sd, PO1030_DEVID_H, &dev_id_h, 1)) 183 return -ENODEV; 184 185 if (dev_id_h == 0x30) { 186 pr_info("Detected a po1030 sensor\n"); 187 goto sensor_found; 188 } 189 return -ENODEV; 190 191 sensor_found: 192 sd->gspca_dev.cam.cam_mode = po1030_modes; 193 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(po1030_modes); 194 195 return 0; 196 } 197 198 int po1030_init(struct sd *sd) 199 { 200 int i, err = 0; 201 202 /* Init the sensor */ 203 for (i = 0; i < ARRAY_SIZE(init_po1030) && !err; i++) { 204 u8 data[2] = {0x00, 0x00}; 205 206 switch (init_po1030[i][0]) { 207 case BRIDGE: 208 err = m5602_write_bridge(sd, 209 init_po1030[i][1], 210 init_po1030[i][2]); 211 break; 212 213 case SENSOR: 214 data[0] = init_po1030[i][2]; 215 err = m5602_write_sensor(sd, 216 init_po1030[i][1], data, 1); 217 break; 218 219 default: 220 pr_info("Invalid stream command, exiting init\n"); 221 return -EINVAL; 222 } 223 } 224 if (err < 0) 225 return err; 226 227 if (dump_sensor) 228 po1030_dump_registers(sd); 229 230 return 0; 231 } 232 233 int po1030_init_controls(struct sd *sd) 234 { 235 struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler; 236 237 sd->gspca_dev.vdev.ctrl_handler = hdl; 238 v4l2_ctrl_handler_init(hdl, 9); 239 240 sd->auto_white_bal = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, 241 V4L2_CID_AUTO_WHITE_BALANCE, 242 0, 1, 1, 0); 243 sd->green_bal = v4l2_ctrl_new_custom(hdl, &po1030_greenbal_cfg, NULL); 244 sd->red_bal = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, 245 V4L2_CID_RED_BALANCE, 0, 255, 1, 246 PO1030_RED_GAIN_DEFAULT); 247 sd->blue_bal = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, 248 V4L2_CID_BLUE_BALANCE, 0, 255, 1, 249 PO1030_BLUE_GAIN_DEFAULT); 250 251 sd->autoexpo = v4l2_ctrl_new_std_menu(hdl, &po1030_ctrl_ops, 252 V4L2_CID_EXPOSURE_AUTO, 1, 0, V4L2_EXPOSURE_MANUAL); 253 sd->expo = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_EXPOSURE, 254 0, 0x2ff, 1, PO1030_EXPOSURE_DEFAULT); 255 256 sd->gain = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_GAIN, 0, 257 0x4f, 1, PO1030_GLOBAL_GAIN_DEFAULT); 258 259 sd->hflip = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_HFLIP, 260 0, 1, 1, 0); 261 sd->vflip = v4l2_ctrl_new_std(hdl, &po1030_ctrl_ops, V4L2_CID_VFLIP, 262 0, 1, 1, 0); 263 264 if (hdl->error) { 265 pr_err("Could not initialize controls\n"); 266 return hdl->error; 267 } 268 269 v4l2_ctrl_auto_cluster(4, &sd->auto_white_bal, 0, false); 270 v4l2_ctrl_auto_cluster(2, &sd->autoexpo, 0, false); 271 v4l2_ctrl_cluster(2, &sd->hflip); 272 273 return 0; 274 } 275 276 int po1030_start(struct sd *sd) 277 { 278 struct cam *cam = &sd->gspca_dev.cam; 279 int i, err = 0; 280 int width = cam->cam_mode[sd->gspca_dev.curr_mode].width; 281 int height = cam->cam_mode[sd->gspca_dev.curr_mode].height; 282 int ver_offs = cam->cam_mode[sd->gspca_dev.curr_mode].priv; 283 u8 data; 284 285 switch (width) { 286 case 320: 287 data = PO1030_SUBSAMPLING; 288 err = m5602_write_sensor(sd, PO1030_CONTROL3, &data, 1); 289 if (err < 0) 290 return err; 291 292 data = ((width + 3) >> 8) & 0xff; 293 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_H, &data, 1); 294 if (err < 0) 295 return err; 296 297 data = (width + 3) & 0xff; 298 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_L, &data, 1); 299 if (err < 0) 300 return err; 301 302 data = ((height + 1) >> 8) & 0xff; 303 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_H, &data, 1); 304 if (err < 0) 305 return err; 306 307 data = (height + 1) & 0xff; 308 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_L, &data, 1); 309 310 height += 6; 311 width -= 1; 312 break; 313 314 case 640: 315 data = 0; 316 err = m5602_write_sensor(sd, PO1030_CONTROL3, &data, 1); 317 if (err < 0) 318 return err; 319 320 data = ((width + 7) >> 8) & 0xff; 321 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_H, &data, 1); 322 if (err < 0) 323 return err; 324 325 data = (width + 7) & 0xff; 326 err = m5602_write_sensor(sd, PO1030_WINDOWWIDTH_L, &data, 1); 327 if (err < 0) 328 return err; 329 330 data = ((height + 3) >> 8) & 0xff; 331 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_H, &data, 1); 332 if (err < 0) 333 return err; 334 335 data = (height + 3) & 0xff; 336 err = m5602_write_sensor(sd, PO1030_WINDOWHEIGHT_L, &data, 1); 337 338 height += 12; 339 width -= 2; 340 break; 341 } 342 err = m5602_write_bridge(sd, M5602_XB_SENSOR_TYPE, 0x0c); 343 if (err < 0) 344 return err; 345 346 err = m5602_write_bridge(sd, M5602_XB_LINE_OF_FRAME_H, 0x81); 347 if (err < 0) 348 return err; 349 350 err = m5602_write_bridge(sd, M5602_XB_PIX_OF_LINE_H, 0x82); 351 if (err < 0) 352 return err; 353 354 err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0x01); 355 if (err < 0) 356 return err; 357 358 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 359 ((ver_offs >> 8) & 0xff)); 360 if (err < 0) 361 return err; 362 363 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (ver_offs & 0xff)); 364 if (err < 0) 365 return err; 366 367 for (i = 0; i < 2 && !err; i++) 368 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0); 369 if (err < 0) 370 return err; 371 372 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height >> 8) & 0xff); 373 if (err < 0) 374 return err; 375 376 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, (height & 0xff)); 377 if (err < 0) 378 return err; 379 380 for (i = 0; i < 2 && !err; i++) 381 err = m5602_write_bridge(sd, M5602_XB_VSYNC_PARA, 0); 382 383 for (i = 0; i < 2 && !err; i++) 384 err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0); 385 386 for (i = 0; i < 2 && !err; i++) 387 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, 0); 388 if (err < 0) 389 return err; 390 391 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, (width >> 8) & 0xff); 392 if (err < 0) 393 return err; 394 395 err = m5602_write_bridge(sd, M5602_XB_HSYNC_PARA, (width & 0xff)); 396 if (err < 0) 397 return err; 398 399 err = m5602_write_bridge(sd, M5602_XB_SIG_INI, 0); 400 return err; 401 } 402 403 static int po1030_set_exposure(struct gspca_dev *gspca_dev, __s32 val) 404 { 405 struct sd *sd = (struct sd *) gspca_dev; 406 u8 i2c_data; 407 int err; 408 409 gspca_dbg(gspca_dev, D_CONF, "Set exposure to %d\n", val & 0xffff); 410 411 i2c_data = ((val & 0xff00) >> 8); 412 gspca_dbg(gspca_dev, D_CONF, "Set exposure to high byte to 0x%x\n", 413 i2c_data); 414 415 err = m5602_write_sensor(sd, PO1030_INTEGLINES_H, 416 &i2c_data, 1); 417 if (err < 0) 418 return err; 419 420 i2c_data = (val & 0xff); 421 gspca_dbg(gspca_dev, D_CONF, "Set exposure to low byte to 0x%x\n", 422 i2c_data); 423 err = m5602_write_sensor(sd, PO1030_INTEGLINES_M, 424 &i2c_data, 1); 425 426 return err; 427 } 428 429 static int po1030_set_gain(struct gspca_dev *gspca_dev, __s32 val) 430 { 431 struct sd *sd = (struct sd *) gspca_dev; 432 u8 i2c_data; 433 int err; 434 435 i2c_data = val & 0xff; 436 gspca_dbg(gspca_dev, D_CONF, "Set global gain to %d\n", i2c_data); 437 err = m5602_write_sensor(sd, PO1030_GLOBALGAIN, 438 &i2c_data, 1); 439 return err; 440 } 441 442 static int po1030_set_hvflip(struct gspca_dev *gspca_dev) 443 { 444 struct sd *sd = (struct sd *) gspca_dev; 445 u8 i2c_data; 446 int err; 447 448 gspca_dbg(gspca_dev, D_CONF, "Set hvflip %d %d\n", 449 sd->hflip->val, sd->vflip->val); 450 err = m5602_read_sensor(sd, PO1030_CONTROL2, &i2c_data, 1); 451 if (err < 0) 452 return err; 453 454 i2c_data = (0x3f & i2c_data) | (sd->hflip->val << 7) | 455 (sd->vflip->val << 6); 456 457 err = m5602_write_sensor(sd, PO1030_CONTROL2, 458 &i2c_data, 1); 459 460 return err; 461 } 462 463 static int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val) 464 { 465 struct sd *sd = (struct sd *) gspca_dev; 466 u8 i2c_data; 467 int err; 468 469 i2c_data = val & 0xff; 470 gspca_dbg(gspca_dev, D_CONF, "Set red gain to %d\n", i2c_data); 471 err = m5602_write_sensor(sd, PO1030_RED_GAIN, 472 &i2c_data, 1); 473 return err; 474 } 475 476 static int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val) 477 { 478 struct sd *sd = (struct sd *) gspca_dev; 479 u8 i2c_data; 480 int err; 481 482 i2c_data = val & 0xff; 483 gspca_dbg(gspca_dev, D_CONF, "Set blue gain to %d\n", i2c_data); 484 err = m5602_write_sensor(sd, PO1030_BLUE_GAIN, 485 &i2c_data, 1); 486 487 return err; 488 } 489 490 static int po1030_set_green_balance(struct gspca_dev *gspca_dev, __s32 val) 491 { 492 struct sd *sd = (struct sd *) gspca_dev; 493 u8 i2c_data; 494 int err; 495 496 i2c_data = val & 0xff; 497 gspca_dbg(gspca_dev, D_CONF, "Set green gain to %d\n", i2c_data); 498 499 err = m5602_write_sensor(sd, PO1030_GREEN_1_GAIN, 500 &i2c_data, 1); 501 if (err < 0) 502 return err; 503 504 return m5602_write_sensor(sd, PO1030_GREEN_2_GAIN, 505 &i2c_data, 1); 506 } 507 508 static int po1030_set_auto_white_balance(struct gspca_dev *gspca_dev, 509 __s32 val) 510 { 511 struct sd *sd = (struct sd *) gspca_dev; 512 u8 i2c_data; 513 int err; 514 515 err = m5602_read_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 516 if (err < 0) 517 return err; 518 519 gspca_dbg(gspca_dev, D_CONF, "Set auto white balance to %d\n", val); 520 i2c_data = (i2c_data & 0xfe) | (val & 0x01); 521 err = m5602_write_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 522 return err; 523 } 524 525 static int po1030_set_auto_exposure(struct gspca_dev *gspca_dev, 526 __s32 val) 527 { 528 struct sd *sd = (struct sd *) gspca_dev; 529 u8 i2c_data; 530 int err; 531 532 err = m5602_read_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 533 if (err < 0) 534 return err; 535 536 gspca_dbg(gspca_dev, D_CONF, "Set auto exposure to %d\n", val); 537 val = (val == V4L2_EXPOSURE_AUTO); 538 i2c_data = (i2c_data & 0xfd) | ((val & 0x01) << 1); 539 return m5602_write_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 540 } 541 542 void po1030_disconnect(struct sd *sd) 543 { 544 sd->sensor = NULL; 545 } 546 547 static int po1030_s_ctrl(struct v4l2_ctrl *ctrl) 548 { 549 struct gspca_dev *gspca_dev = 550 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 551 struct sd *sd = (struct sd *) gspca_dev; 552 int err; 553 554 if (!gspca_dev->streaming) 555 return 0; 556 557 switch (ctrl->id) { 558 case V4L2_CID_AUTO_WHITE_BALANCE: 559 err = po1030_set_auto_white_balance(gspca_dev, ctrl->val); 560 if (err || ctrl->val) 561 return err; 562 err = po1030_set_green_balance(gspca_dev, sd->green_bal->val); 563 if (err) 564 return err; 565 err = po1030_set_red_balance(gspca_dev, sd->red_bal->val); 566 if (err) 567 return err; 568 err = po1030_set_blue_balance(gspca_dev, sd->blue_bal->val); 569 break; 570 case V4L2_CID_EXPOSURE_AUTO: 571 err = po1030_set_auto_exposure(gspca_dev, ctrl->val); 572 if (err || ctrl->val == V4L2_EXPOSURE_AUTO) 573 return err; 574 err = po1030_set_exposure(gspca_dev, sd->expo->val); 575 break; 576 case V4L2_CID_GAIN: 577 err = po1030_set_gain(gspca_dev, ctrl->val); 578 break; 579 case V4L2_CID_HFLIP: 580 err = po1030_set_hvflip(gspca_dev); 581 break; 582 default: 583 return -EINVAL; 584 } 585 586 return err; 587 } 588 589 static void po1030_dump_registers(struct sd *sd) 590 { 591 int address; 592 u8 value = 0; 593 594 pr_info("Dumping the po1030 sensor core registers\n"); 595 for (address = 0; address < 0x7f; address++) { 596 m5602_read_sensor(sd, address, &value, 1); 597 pr_info("register 0x%x contains 0x%x\n", address, value); 598 } 599 600 pr_info("po1030 register state dump complete\n"); 601 602 pr_info("Probing for which registers that are read/write\n"); 603 for (address = 0; address < 0xff; address++) { 604 u8 old_value, ctrl_value; 605 u8 test_value[2] = {0xff, 0xff}; 606 607 m5602_read_sensor(sd, address, &old_value, 1); 608 m5602_write_sensor(sd, address, test_value, 1); 609 m5602_read_sensor(sd, address, &ctrl_value, 1); 610 611 if (ctrl_value == test_value[0]) 612 pr_info("register 0x%x is writeable\n", address); 613 else 614 pr_info("register 0x%x is read only\n", address); 615 616 /* Restore original value */ 617 m5602_write_sensor(sd, address, &old_value, 1); 618 } 619 } 620