1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Driver for the po1030 sensor 4 * 5 * Copyright (c) 2008 Erik Andr��n 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 19static int po1030_s_ctrl(struct v4l2_ctrl *ctrl); 20static void po1030_dump_registers(struct sd *sd); 21 22static 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 48static 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 126static 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 139static const struct v4l2_ctrl_ops po1030_ctrl_ops = { 140 .s_ctrl = po1030_s_ctrl, 141}; 142 143static 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 155int po1030_probe(struct sd *sd) 156{ 157 u8 dev_id_h = 0, i; 158 int err; 159 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 160 161 if (force_sensor) { 162 if (force_sensor == PO1030_SENSOR) { 163 pr_info("Forcing a %s sensor\n", po1030.name); 164 goto sensor_found; 165 } 166 /* If we want to force another sensor, don't try to probe this 167 * one */ 168 return -ENODEV; 169 } 170 171 gspca_dbg(gspca_dev, D_PROBE, "Probing for a po1030 sensor\n"); 172 173 /* Run the pre-init to actually probe the unit */ 174 for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) { 175 u8 data = preinit_po1030[i][2]; 176 if (preinit_po1030[i][0] == SENSOR) 177 err = m5602_write_sensor(sd, preinit_po1030[i][1], 178 &data, 1); 179 else 180 err = m5602_write_bridge(sd, preinit_po1030[i][1], 181 data); 182 if (err < 0) 183 return err; 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 195sensor_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 202int 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 237int 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 280int 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 407static 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 gspca_dbg(gspca_dev, D_CONF, "Set exposure to %d\n", val & 0xffff); 414 415 i2c_data = ((val & 0xff00) >> 8); 416 gspca_dbg(gspca_dev, D_CONF, "Set exposure to high byte to 0x%x\n", 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 gspca_dbg(gspca_dev, D_CONF, "Set exposure to low byte to 0x%x\n", 426 i2c_data); 427 err = m5602_write_sensor(sd, PO1030_INTEGLINES_M, 428 &i2c_data, 1); 429 430 return err; 431} 432 433static 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 gspca_dbg(gspca_dev, D_CONF, "Set global gain to %d\n", i2c_data); 441 err = m5602_write_sensor(sd, PO1030_GLOBALGAIN, 442 &i2c_data, 1); 443 return err; 444} 445 446static 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 gspca_dbg(gspca_dev, D_CONF, "Set hvflip %d %d\n", 453 sd->hflip->val, sd->vflip->val); 454 err = m5602_read_sensor(sd, PO1030_CONTROL2, &i2c_data, 1); 455 if (err < 0) 456 return err; 457 458 i2c_data = (0x3f & i2c_data) | (sd->hflip->val << 7) | 459 (sd->vflip->val << 6); 460 461 err = m5602_write_sensor(sd, PO1030_CONTROL2, 462 &i2c_data, 1); 463 464 return err; 465} 466 467static int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val) 468{ 469 struct sd *sd = (struct sd *) gspca_dev; 470 u8 i2c_data; 471 int err; 472 473 i2c_data = val & 0xff; 474 gspca_dbg(gspca_dev, D_CONF, "Set red gain to %d\n", i2c_data); 475 err = m5602_write_sensor(sd, PO1030_RED_GAIN, 476 &i2c_data, 1); 477 return err; 478} 479 480static int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val) 481{ 482 struct sd *sd = (struct sd *) gspca_dev; 483 u8 i2c_data; 484 int err; 485 486 i2c_data = val & 0xff; 487 gspca_dbg(gspca_dev, D_CONF, "Set blue gain to %d\n", i2c_data); 488 err = m5602_write_sensor(sd, PO1030_BLUE_GAIN, 489 &i2c_data, 1); 490 491 return err; 492} 493 494static int po1030_set_green_balance(struct gspca_dev *gspca_dev, __s32 val) 495{ 496 struct sd *sd = (struct sd *) gspca_dev; 497 u8 i2c_data; 498 int err; 499 500 i2c_data = val & 0xff; 501 gspca_dbg(gspca_dev, D_CONF, "Set green gain to %d\n", i2c_data); 502 503 err = m5602_write_sensor(sd, PO1030_GREEN_1_GAIN, 504 &i2c_data, 1); 505 if (err < 0) 506 return err; 507 508 return m5602_write_sensor(sd, PO1030_GREEN_2_GAIN, 509 &i2c_data, 1); 510} 511 512static int po1030_set_auto_white_balance(struct gspca_dev *gspca_dev, 513 __s32 val) 514{ 515 struct sd *sd = (struct sd *) gspca_dev; 516 u8 i2c_data; 517 int err; 518 519 err = m5602_read_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 520 if (err < 0) 521 return err; 522 523 gspca_dbg(gspca_dev, D_CONF, "Set auto white balance to %d\n", val); 524 i2c_data = (i2c_data & 0xfe) | (val & 0x01); 525 err = m5602_write_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 526 return err; 527} 528 529static int po1030_set_auto_exposure(struct gspca_dev *gspca_dev, 530 __s32 val) 531{ 532 struct sd *sd = (struct sd *) gspca_dev; 533 u8 i2c_data; 534 int err; 535 536 err = m5602_read_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 537 if (err < 0) 538 return err; 539 540 gspca_dbg(gspca_dev, D_CONF, "Set auto exposure to %d\n", val); 541 val = (val == V4L2_EXPOSURE_AUTO); 542 i2c_data = (i2c_data & 0xfd) | ((val & 0x01) << 1); 543 return m5602_write_sensor(sd, PO1030_AUTOCTRL1, &i2c_data, 1); 544} 545 546void po1030_disconnect(struct sd *sd) 547{ 548 sd->sensor = NULL; 549} 550 551static int po1030_s_ctrl(struct v4l2_ctrl *ctrl) 552{ 553 struct gspca_dev *gspca_dev = 554 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 555 struct sd *sd = (struct sd *) gspca_dev; 556 int err; 557 558 if (!gspca_dev->streaming) 559 return 0; 560 561 switch (ctrl->id) { 562 case V4L2_CID_AUTO_WHITE_BALANCE: 563 err = po1030_set_auto_white_balance(gspca_dev, ctrl->val); 564 if (err || ctrl->val) 565 return err; 566 err = po1030_set_green_balance(gspca_dev, sd->green_bal->val); 567 if (err) 568 return err; 569 err = po1030_set_red_balance(gspca_dev, sd->red_bal->val); 570 if (err) 571 return err; 572 err = po1030_set_blue_balance(gspca_dev, sd->blue_bal->val); 573 break; 574 case V4L2_CID_EXPOSURE_AUTO: 575 err = po1030_set_auto_exposure(gspca_dev, ctrl->val); 576 if (err || ctrl->val == V4L2_EXPOSURE_AUTO) 577 return err; 578 err = po1030_set_exposure(gspca_dev, sd->expo->val); 579 break; 580 case V4L2_CID_GAIN: 581 err = po1030_set_gain(gspca_dev, ctrl->val); 582 break; 583 case V4L2_CID_HFLIP: 584 err = po1030_set_hvflip(gspca_dev); 585 break; 586 default: 587 return -EINVAL; 588 } 589 590 return err; 591} 592 593static void po1030_dump_registers(struct sd *sd) 594{ 595 int address; 596 u8 value = 0; 597 598 pr_info("Dumping the po1030 sensor core registers\n"); 599 for (address = 0; address < 0x7f; address++) { 600 m5602_read_sensor(sd, address, &value, 1); 601 pr_info("register 0x%x contains 0x%x\n", address, value); 602 } 603 604 pr_info("po1030 register state dump complete\n"); 605 606 pr_info("Probing for which registers that are read/write\n"); 607 for (address = 0; address < 0xff; address++) { 608 u8 old_value, ctrl_value; 609 u8 test_value[2] = {0xff, 0xff}; 610 611 m5602_read_sensor(sd, address, &old_value, 1); 612 m5602_write_sensor(sd, address, test_value, 1); 613 m5602_read_sensor(sd, address, &ctrl_value, 1); 614 615 if (ctrl_value == test_value[0]) 616 pr_info("register 0x%x is writeable\n", address); 617 else 618 pr_info("register 0x%x is read only\n", address); 619 620 /* Restore original value */ 621 m5602_write_sensor(sd, address, &old_value, 1); 622 } 623} 624