extractedLnx/linux-2.2.26/drivers/char/cpia.c_cpia_write_proc.c

static int cpia_write_proc(struct file *file, const char *buffer,
                           unsigned long count, void *data)
{
	struct cam_data *cam = data;
	struct cam_params new_params;
	int retval, find_colon;
	int size = count;
	unsigned long val;
	u32 command_flags = 0;
	u8 new_mains;
	
	if (down_interruptible(&cam->param_lock))
		return -ERESTARTSYS;
	
	/*
	 * Skip over leading whitespace
	 */
	while (count && isspace(*buffer)) {
		--count;
		++buffer;
	}
	
	memcpy(&new_params, &cam->params, sizeof(struct cam_params));
	new_mains = cam->mainsFreq;
	
#define MATCH(x) \
	({ \
		int _len = strlen(x), _ret, _colon_found; \
		_ret = (_len <= count && strncmp(buffer, x, _len) == 0); \
		if (_ret) { \
			buffer += _len; \
			count -= _len; \
			if (find_colon) { \
				_colon_found = 0; \
				while (count && (*buffer == ' ' || *buffer == '\t' || \
				       (!_colon_found && *buffer == ':'))) { \
					if (*buffer == ':')  \
						_colon_found = 1; \
					--count; \
					++buffer; \
				} \
				if (!count || !_colon_found) \
					retval = -EINVAL; \
				find_colon = 0; \
			} \
		} \
		_ret; \
	})
#define FIRMWARE_VERSION(x,y) (new_params.version.firmwareVersion == (x) && \
                               new_params.version.firmwareRevision == (y))
#define VALUE \
	({ \
		char *_p; \
		unsigned long int _ret; \
		_ret = simple_strtoul(buffer, &_p, 0); \
		if (_p == buffer) \
			retval = -EINVAL; \
		else { \
			count -= _p - buffer; \
			buffer = _p; \
		} \
		_ret; \
	})

	retval = 0;
	while (count && !retval) {
		find_colon = 1;
		if (MATCH("brightness")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 100)
					new_params.colourParams.brightness = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOLOURPARAMS;
		} else if (MATCH("contrast")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 100) {
					/* contrast is in steps of 8, so round*/
					val = ((val + 3) / 8) * 8;
					/* 1-02 firmware limits contrast to 80*/
					if (FIRMWARE_VERSION(1,2) && val > 80)
						val = 80;

					new_params.colourParams.contrast = val;
				} else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOLOURPARAMS;
		} else if (MATCH("saturation")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 100)
					new_params.colourParams.saturation = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOLOURPARAMS;
		} else if (MATCH("sensor_fps")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				/* find values so that sensorFPS is minimized,
				 * but >= val */
				if (val > 30)
					retval = -EINVAL;
				else if (val > 25) {
					new_params.sensorFps.divisor = 0;
					new_params.sensorFps.baserate = 1;
				} else if (val > 15) {
					new_params.sensorFps.divisor = 0;
					new_params.sensorFps.baserate = 0;
				} else if (val > 12) {
					new_params.sensorFps.divisor = 1;
					new_params.sensorFps.baserate = 1;
				} else if (val > 7) {
					new_params.sensorFps.divisor = 1;
					new_params.sensorFps.baserate = 0;
				} else if (val > 6) {
					new_params.sensorFps.divisor = 2;
					new_params.sensorFps.baserate = 1;
				} else if (val > 3) {
					new_params.sensorFps.divisor = 2;
					new_params.sensorFps.baserate = 0;
				} else {
					new_params.sensorFps.divisor = 3;
					/* Either base rate would work here */
					new_params.sensorFps.baserate = 1;
				}
				new_params.flickerControl.coarseJump = 
					flicker_jumps[new_mains]
					[new_params.sensorFps.baserate]
					[new_params.sensorFps.divisor];
				if (new_params.flickerControl.flickerMode)
					command_flags |= COMMAND_SETFLICKERCTRL;
			}
			command_flags |= COMMAND_SETSENSORFPS;
		} else if (MATCH("stream_start_line")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				int max_line = 288;

				if (new_params.format.videoSize == VIDEOSIZE_QCIF)
					max_line = 144;
				if (val <= max_line)
					new_params.streamStartLine = val/2;
				else
					retval = -EINVAL;
			}
		} else if (MATCH("sub_sample")) {
			if (!retval && MATCH("420"))
				new_params.format.subSample = SUBSAMPLE_420;
			else if (!retval && MATCH("422"))
				new_params.format.subSample = SUBSAMPLE_422;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETFORMAT;
		} else if (MATCH("yuv_order")) {
			if (!retval && MATCH("YUYV"))
				new_params.format.yuvOrder = YUVORDER_YUYV;
			else if (!retval && MATCH("UYVY"))
				new_params.format.yuvOrder = YUVORDER_UYVY;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETFORMAT;
		} else if (MATCH("ecp_timing")) {
			if (!retval && MATCH("normal"))
				new_params.ecpTiming = 0;
			else if (!retval && MATCH("slow"))
				new_params.ecpTiming = 1;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETECPTIMING;
		} else if (MATCH("color_balance_mode")) {
			if (!retval && MATCH("manual"))
				new_params.colourBalance.balanceModeIsAuto = 0;
			else if (!retval && MATCH("auto"))
				new_params.colourBalance.balanceModeIsAuto = 1;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETCOLOURBALANCE;
		} else if (MATCH("red_gain")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 212)
					new_params.colourBalance.redGain = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOLOURBALANCE;
		} else if (MATCH("green_gain")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 212)
					new_params.colourBalance.greenGain = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOLOURBALANCE;
		} else if (MATCH("blue_gain")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 212)
					new_params.colourBalance.blueGain = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOLOURBALANCE;
		} else if (MATCH("max_gain")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				/* 1-02 firmware limits gain to 2 */
				if (FIRMWARE_VERSION(1,2) && val > 2)
					val = 2;
				switch(val) {
				case 1:
					new_params.exposure.gainMode = 1;
					break;
				case 2:
					new_params.exposure.gainMode = 2;
					break;
				case 4:
					new_params.exposure.gainMode = 3;
					break;
				case 8:
					new_params.exposure.gainMode = 4;
					break;
				default:
					retval = -EINVAL;
					break;
				}
			}
			command_flags |= COMMAND_SETEXPOSURE;
		} else if (MATCH("exposure_mode")) {
			if (!retval && MATCH("auto"))
				new_params.exposure.expMode = 2;
			else if (!retval && MATCH("manual")) {
				if (new_params.exposure.expMode == 2)
					new_params.exposure.expMode = 3;
				new_params.flickerControl.flickerMode = 0;
				command_flags |= COMMAND_SETFLICKERCTRL;
			} else
				retval = -EINVAL;

			command_flags |= COMMAND_SETEXPOSURE;
		} else if (MATCH("centre_weight")) {
			if (!retval && MATCH("on"))
				new_params.exposure.centreWeight = 1;
			else if (!retval && MATCH("off"))
				new_params.exposure.centreWeight = 2;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETEXPOSURE;
		} else if (MATCH("gain")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				switch(val) {
				case 1:
					new_params.exposure.gain = 0;
					new_params.exposure.expMode = 1;
					new_params.flickerControl.flickerMode = 0;
					command_flags |= COMMAND_SETFLICKERCTRL;
					break;
				case 2:
					new_params.exposure.gain = 1;
					new_params.exposure.expMode = 1;
					new_params.flickerControl.flickerMode = 0;
					command_flags |= COMMAND_SETFLICKERCTRL;
					break;
				case 4:
					new_params.exposure.gain = 2;
					new_params.exposure.expMode = 1;
					new_params.flickerControl.flickerMode = 0;
					command_flags |= COMMAND_SETFLICKERCTRL;
					break;
				case 8:
					new_params.exposure.gain = 3;
					new_params.exposure.expMode = 1;
					new_params.flickerControl.flickerMode = 0;
					command_flags |= COMMAND_SETFLICKERCTRL;
					break;
				default:
					retval = -EINVAL;
					break;
				}
				command_flags |= COMMAND_SETEXPOSURE;
				if (new_params.exposure.gain >
				    new_params.exposure.gainMode-1)
					retval = -EINVAL;
			}
		} else if (MATCH("fine_exp")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val < 256) {
					/* 1-02 firmware limits fineExp to 127*/
					if (FIRMWARE_VERSION(1,2) && val > 127)
						val = 127;
					new_params.exposure.fineExp = val;
					new_params.exposure.expMode = 1;
					command_flags |= COMMAND_SETEXPOSURE;
					new_params.flickerControl.flickerMode = 0;
					command_flags |= COMMAND_SETFLICKERCTRL;
				} else
					retval = -EINVAL;
			}
		} else if (MATCH("coarse_exp")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val < 65536) {
					/* 1-02 firmware limits
					 * coarseExp to 255 */
					if (FIRMWARE_VERSION(1,2) && val > 255)
						val = 255;
					new_params.exposure.coarseExpLo =
						val & 0xff;
					new_params.exposure.coarseExpHi =
						val >> 8;
					new_params.exposure.expMode = 1;
					command_flags |= COMMAND_SETEXPOSURE;
					new_params.flickerControl.flickerMode = 0;
					command_flags |= COMMAND_SETFLICKERCTRL;
				} else
					retval = -EINVAL;
			}
		} else if (MATCH("red_comp")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val >= 220 && val <= 255) {
					new_params.exposure.redComp = val;
					command_flags |= COMMAND_SETEXPOSURE;
				} else
					retval = -EINVAL;
			}
		} else if (MATCH("green1_comp")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val >= 214 && val <= 255) {
					new_params.exposure.green1Comp = val;
					command_flags |= COMMAND_SETEXPOSURE;
				} else
					retval = -EINVAL;
			}
		} else if (MATCH("green2_comp")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val >= 214 && val <= 255) {
					new_params.exposure.green2Comp = val;
					command_flags |= COMMAND_SETEXPOSURE;
				} else
					retval = -EINVAL;
			}
		} else if (MATCH("blue_comp")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val >= 230 && val <= 255) {
					new_params.exposure.blueComp = val;
					command_flags |= COMMAND_SETEXPOSURE;
				} else
					retval = -EINVAL;
			}
		} else if (MATCH("apcor_gain1")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				command_flags |= COMMAND_SETAPCOR;
				if (val <= 0xff)
					new_params.apcor.gain1 = val;
				else
					retval = -EINVAL;
			}
		} else if (MATCH("apcor_gain2")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				command_flags |= COMMAND_SETAPCOR;
				if (val <= 0xff)
					new_params.apcor.gain2 = val;
				else
					retval = -EINVAL;
			}
		} else if (MATCH("apcor_gain4")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				command_flags |= COMMAND_SETAPCOR;
				if (val <= 0xff)
					new_params.apcor.gain4 = val;
				else
					retval = -EINVAL;
			}
		} else if (MATCH("apcor_gain8")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				command_flags |= COMMAND_SETAPCOR;
				if (val <= 0xff)
					new_params.apcor.gain8 = val;
				else
					retval = -EINVAL;
			}
		} else if (MATCH("vl_offset_gain1")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.vlOffset.gain1 = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETVLOFFSET;
		} else if (MATCH("vl_offset_gain2")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.vlOffset.gain2 = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETVLOFFSET;
		} else if (MATCH("vl_offset_gain4")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.vlOffset.gain4 = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETVLOFFSET;
		} else if (MATCH("vl_offset_gain8")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.vlOffset.gain8 = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETVLOFFSET;
		} else if (MATCH("flicker_control")) {
			if (!retval && MATCH("on")) {
				new_params.flickerControl.flickerMode = 1;
				new_params.exposure.expMode = 2;
				command_flags |= COMMAND_SETEXPOSURE;
			} else if (!retval && MATCH("off"))
				new_params.flickerControl.flickerMode = 0;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETFLICKERCTRL;
		} else if (MATCH("mains_frequency")) {
			if (!retval && MATCH("50")) {
				new_mains = 0;
				new_params.flickerControl.coarseJump = 
					flicker_jumps[new_mains]
					[new_params.sensorFps.baserate]
					[new_params.sensorFps.divisor];
				if (new_params.flickerControl.flickerMode)
					command_flags |= COMMAND_SETFLICKERCTRL;
			} else if (!retval && MATCH("60")) {
				new_mains = 1;
				new_params.flickerControl.coarseJump = 
					flicker_jumps[new_mains]
					[new_params.sensorFps.baserate]
					[new_params.sensorFps.divisor];
				if (new_params.flickerControl.flickerMode)
					command_flags |= COMMAND_SETFLICKERCTRL;
			} else
				retval = -EINVAL;
		} else if (MATCH("allowable_overexposure")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff) {
					new_params.flickerControl.
						allowableOverExposure = val;
					command_flags |= COMMAND_SETFLICKERCTRL;
				} else
					retval = -EINVAL;
			}
		} else if (MATCH("compression_mode")) {
			if (!retval && MATCH("none"))
				new_params.compression.mode =
					CPIA_COMPRESSION_NONE;
			else if (!retval && MATCH("auto"))
				new_params.compression.mode =
					CPIA_COMPRESSION_AUTO;
			else if (!retval && MATCH("manual"))
				new_params.compression.mode =
					CPIA_COMPRESSION_MANUAL;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETCOMPRESSION;
		} else if (MATCH("decimation_enable")) {
			if (!retval && MATCH("off"))
				new_params.compression.decimation = 0;
			else if (!retval && MATCH("on"))
				new_params.compression.decimation = 1;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETCOMPRESSION;
		} else if (MATCH("compression_target")) {
			if (!retval && MATCH("quality"))
				new_params.compressionTarget.frTargeting = 
					CPIA_COMPRESSION_TARGET_QUALITY;
			else if (!retval && MATCH("framerate"))
				new_params.compressionTarget.frTargeting = 
					CPIA_COMPRESSION_TARGET_FRAMERATE;
			else
				retval = -EINVAL;

			command_flags |= COMMAND_SETCOMPRESSIONTARGET;
		} else if (MATCH("target_framerate")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if(val > 0 && val <= 30)
					new_params.compressionTarget.targetFR = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONTARGET;
		} else if (MATCH("target_quality")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if(val > 0 && val <= 64)
					new_params.compressionTarget.targetQ = val;
				else 
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONTARGET;
		} else if (MATCH("y_threshold")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val < 32)
					new_params.yuvThreshold.yThreshold = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETYUVTHRESH;
		} else if (MATCH("uv_threshold")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val < 32)
					new_params.yuvThreshold.uvThreshold = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETYUVTHRESH;
		} else if (MATCH("hysteresis")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.hysteresis = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("threshold_max")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.threshMax = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("small_step")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.smallStep = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("large_step")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.largeStep = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("decimation_hysteresis")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.decimationHysteresis = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("fr_diff_step_thresh")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.frDiffStepThresh = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("q_diff_step_thresh")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.qDiffStepThresh = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("decimation_thresh_mod")) {
			if (!retval)
				val = VALUE;

			if (!retval) {
				if (val <= 0xff)
					new_params.compressionParams.decimationThreshMod = val;
				else
					retval = -EINVAL;
			}
			command_flags |= COMMAND_SETCOMPRESSIONPARAMS;
		} else if (MATCH("toplight")) { /* GA 4/14/00 */
		        if (!retval && MATCH("on"))
			  new_params.qx3.toplight = 1;

			else if (!retval && MATCH("off")) 
			  new_params.qx3.toplight = 0;

			else 
			  retval = -EINVAL;
                        command_flags |= COMMAND_SETLIGHTS;
                        
		} else if (MATCH("bottomlight")) { /* GA 4/14/00 */
		        if (!retval && MATCH("on"))
			  new_params.qx3.bottomlight = 1;

			else if (!retval && MATCH("off")) 
			  new_params.qx3.bottomlight = 0;

			else 
			  retval = -EINVAL;
                        command_flags |= COMMAND_SETLIGHTS;
                        
		} else {
			DBG("No match found\n");
			retval = -EINVAL;
		}

		if (!retval) {
			while (count && isspace(*buffer) && *buffer != '\n') {
				--count;
				++buffer;
			}
			if (count) {
				if (*buffer != '\n' && *buffer != ';')
					retval = -EINVAL;
				else {
					--count;
					++buffer;
				}
			}
		}
	}
#undef MATCH	
#undef FIRMWARE_VERSION
#undef VALUE
#undef FIND_VALUE
#undef FIND_END
	if (!retval) {
		if (command_flags & COMMAND_SETCOLOURPARAMS) {
			/* Adjust cam->vp to reflect these changes */
			cam->vp.brightness =
				new_params.colourParams.brightness*65535/100;
			cam->vp.contrast =
				new_params.colourParams.contrast*65535/100;
			cam->vp.colour =
				new_params.colourParams.saturation*65535/100;
		}
		
		memcpy(&cam->params, &new_params, sizeof(struct cam_params));
		cam->mainsFreq = new_mains;
		cam->cmd_queue |= command_flags;
		retval = size;
	} else
		DBG("error: %d\n", retval);
	
	up(&cam->param_lock);
	
	return retval;
}