#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
#include <i2c/smbus.h>

#include "icx3.h"

void *print_icx3_temp(int fp)
{
	int read_result;
	char buff[1024];
	struct icx3_fancontrol *fanstatus;
	
	for (int i=0; i < ICX3_MAX_FANS; i++) {
		read_result = i2c_smbus_read_i2c_block_data(fp, ICX3_REG_FANCONTROL + i, ICX3_FANCONTROL_SIZE, buff);
		if (read_result != ICX3_FANCONTROL_SIZE) {
			return 0;
		}
		fanstatus = (struct icx3_fancontrol*) &buff;
		printf("%s: %d RPM (%d/%d%%, %s)\n",
			icx3_fan_names[i],
			fanstatus->rpm_status,
			fanstatus->duty_status,
			fanstatus->duty,
			icx3_fan_mode_names[fanstatus->fanmode]
			);
	}
	
	struct icx3_tempsensors *tempsensors;
	read_result = i2c_smbus_read_i2c_block_data(fp, ICX3_REG_TEMPSENSOR, ICX3_TEMPSENSOR_SIZE, buff);
	if (read_result != ICX3_TEMPSENSOR_SIZE) {
		return 0;
	}
	tempsensors = (struct icx3_tempsensors*) &buff;
	
	float cur_temp;
	short cur_data;
	
	for (int i=0; i<ICX3_NUM_TEMP_SENSORS; i++) {
		cur_data = (short)(tempsensors->data[2*i+1] << 8) | (short)(tempsensors->data[2*i]);
		cur_temp = (float)cur_data/10;
		printf("%s %.1f C\n",
		icx3_temp_sensor_names[i],
		cur_temp);
	}
}

/* Check an I2C device file for an ICX3 controller, returs the product id. */
enum icx3_product_id check_for_icx3(char *i2c_dev_path)
{
	char data[I2C_SMBUS_BLOCK_MAX] = {};
	int test_fd, read_result;
	struct icx3_info *temp_info;
	
	test_fd = fopen(i2c_dev_path, O_RDONLY);
	if (!test_fd)
		return ICX3_NONE;
	
	if (ioctl(test_fd, I2C_SLAVE, ICX3_I2C_ADDR) < 0) {
		close(test_fd);
		return ICX3_NONE;
	}
	
	read_result = i2c_smbus_read_i2c_block_data(test_fd, ICX3_REG_READINFORMATION, ICX3_READINFORMATION_SIZE, buff);
	if (read_result == ICX3_READINFORMATION_SIZE) {
		temp_info = (struct *icx3_info)&buff;
		if (temp_info->slave_address == ICX3_I2C_ADDR)
			return temp_info->product_id;
	}

	return ICX3_NONE;
	
}