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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include "i2c-dev.h"
#include "sx150x.h"
#define SOB_BTS_NUM_PA 2
static int g_pa_gpio_offset;
static int g_i2c_fd;
int sob_bts_pa_enable(int pa_num, int enable)
{
int level;
if (pa_num >= SOB_BTS_NUM_PA)
return -EINVAL;
if (enable)
level = 0;
else
level = 1;
return sx150x_gpio_set(g_i2c_fd, g_pa_gpio_offset + pa_num, level);
}
int sob_bts_pa_init(int adapter_nr)
{
char filename[PATH_MAX];
int rc;
snprintf(filename, sizeof(filename)-1, "/dev/i2c-%d", adapter_nr);
rc = open(filename, O_RDWR);
if (rc < 0) {
fprintf(stderr, "Error opening the device: %d\n", rc);
return rc;
}
g_i2c_fd = rc;
rc = ioctl(g_i2c_fd, I2C_SLAVE, SX150x_ADDR_ADDR0);
if (rc < 0) {
fprintf(stderr, "Error setting slave addr: %d\n", rc);
close(g_i2c_fd);
return rc;
}
/* enable pull-up on GPIO7 */
sx150x_gpio_pull_up_set(g_i2c_fd, 7, 1);
if (sx150x_gpio_get(g_i2c_fd, 7) == 0) {
/* daughter board installed: PAs connected to IO2+3 */
g_pa_gpio_offset = 2;
} else {
/* PAs directly connected to 0+1 */
g_pa_gpio_offset = 0;
}
/* set both as output */
sx150x_gpio_direction_set(g_i2c_fd, g_pa_gpio_offset, SX150x_DIR_OUTPUT);
sx150x_gpio_direction_set(g_i2c_fd, g_pa_gpio_offset+1, SX150x_DIR_OUTPUT);
/* disable them as default */
sob_bts_pa_enable(0, 0);
sob_bts_pa_enable(1, 0);
return 0;
}
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