/*
* Description :
* Input :
* Output :
*/
int felica_i2c_read(unsigned char reg, unsigned char *buf, size_t count)
{
ssize_t rc = 0;
mm_segment_t old_fs = get_fs();
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] felica_i2c_read\n");
#endif
set_fs(KERNEL_DS);
/* dev/i2c-0 device file open */
rc = felica_i2c_open();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_open : %d \n",rc);
return rc;
}
/* Set slave address */
rc = felica_i2c_set_slave_address(I2C_FELICA_SLAVE_ADDRESS);
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_set_slave_address : %d \n",rc);
return rc;
}
/* set register address */
rc = sys_write(fd, ®, 1);
if (rc < 0)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - sys_write : %d \n",rc);
return rc;
}
/* read register data */
rc = sys_read(fd, buf, count);
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] read data : 0x%02x \n",*buf);
#endif
if (rc < 0)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - sys_read : %d \n",rc);
return rc;
}
/* release i2c */
rc = felica_i2c_release();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_release : %d \n",rc);
return rc;
}
set_fs(old_fs);
return 0;
}
/*
* Description :
* Input :
* Output :
*/
int felica_i2c_write(unsigned char reg, unsigned char *buf, size_t count)
{
ssize_t rc = 0;
unsigned char write_buf[2];
mm_segment_t old_fs = get_fs();
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] felica_i2c_write\n");
#endif
set_fs(KERNEL_DS);
/* dev/i2c-0 device file open */
rc = felica_i2c_open();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_open : %d \n",rc);
return rc;
}
/* set slave address */
rc = felica_i2c_set_slave_address(I2C_FELICA_SLAVE_ADDRESS);
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_set_slave_address : %d \n",rc);
return rc;
}
/* set register */
memset(write_buf,0x00,2*sizeof(unsigned char));
write_buf[0] = reg;
write_buf[1] = *buf;
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] write_buf[0][1] : 0x%02x 0x%02x \n",write_buf[0],write_buf[1]);
#endif
/* write data */
rc = sys_write(fd, write_buf, 2);
if (rc < 0)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - sys_write : %d \n",rc);
return rc;
}
/* release i2c */
rc = felica_i2c_release();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_release : %d \n",rc);
return rc;
}
set_fs(old_fs);
return 0;
}
/*
* Description :
* Input :
* Output :
*/
int felica_i2c_write(unsigned char reg, unsigned char *buf, size_t count)
{
ssize_t rc = 0;
unsigned char write_buf[2];
mm_segment_t old_fs = get_fs();
int retry = 10;
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] felica_i2c_write\n");
#endif
// while((I2C_STATUS_NO_USE != get_felica_i2c_status())&&(retry > 0))
while((I2C_STATUS_FOR_NFC == get_felica_i2c_status())&&(retry > 0))
{
usleep(100);
retry--;
}
// if(I2C_STATUS_NO_USE != get_felica_i2c_status())
if(I2C_STATUS_FOR_NFC == get_felica_i2c_status())
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - other device(NFC) use i2c abnormally \n");
goto ERROR;
}
set_felica_i2c_status(I2C_STATUS_FOR_FELICA);
set_fs(KERNEL_DS);
/* dev/i2c-0 device file open */
rc = felica_i2c_open();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_open : %d \n",rc);
goto ERROR;
}
/* set slave address */
rc = felica_i2c_set_slave_address(I2C_FELICA_SLAVE_ADDRESS);
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_set_slave_address : %d \n",rc);
goto ERROR;
}
/* set register */
memset(write_buf,0x00,2*sizeof(unsigned char));
write_buf[0] = reg;
write_buf[1] = *buf;
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] write_buf[0][1] : 0x%02x 0x%02x \n",write_buf[0],write_buf[1]);
#endif
/* write data */
rc = sys_write(fd, write_buf, 2);
if (rc < 0)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - sys_write : %d \n",rc);
goto ERROR;
}
/* release i2c */
rc = felica_i2c_release();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_release : %d \n",rc);
goto ERROR;
}
set_fs(old_fs);
// set_felica_i2c_status(I2C_STATUS_NO_USE);
set_felica_i2c_status(I2C_STATUS_READY);
return 0;
ERROR:
// set_felica_i2c_status(I2C_STATUS_NO_USE);
set_felica_i2c_status(I2C_STATUS_READY);
return rc;
}
/*
* Description :
* Input :
* Output :
*/
int felica_i2c_read(unsigned char reg, unsigned char *buf, size_t count)
{
ssize_t rc = 0;
mm_segment_t old_fs = get_fs();
int retry = 10;
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] felica_i2c_read\n");
#endif
// while((I2C_STATUS_NO_USE != get_felica_i2c_status())&&(retry > 0))
while((I2C_STATUS_FOR_NFC == get_felica_i2c_status())&&(retry > 0))
{
usleep(100);
retry--;
}
// if(I2C_STATUS_NO_USE != get_felica_i2c_status())
if(I2C_STATUS_FOR_NFC == get_felica_i2c_status())
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - other device(NFC) use i2c abnormally \n");
goto ERROR;
}
set_felica_i2c_status(I2C_STATUS_FOR_FELICA);
set_fs(KERNEL_DS);
/* dev/i2c-0 device file open */
rc = felica_i2c_open();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_open : %d \n",rc);
goto ERROR;
}
/* Set slave address */
rc = felica_i2c_set_slave_address(I2C_FELICA_SLAVE_ADDRESS);
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_set_slave_address : %d \n",rc);
goto ERROR;
}
/* set register address */
rc = sys_write(fd, ®, 1);
if (rc < 0)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - sys_write : %d \n",rc);
goto ERROR;
}
/* read register data */
rc = sys_read(fd, buf, count);
#ifdef FEATURE_DEBUG_LOW
FELICA_DEBUG_MSG("[FELICA_I2C] read data : 0x%02x \n",*buf);
#endif
if (rc < 0)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - sys_read : %d \n",rc);
goto ERROR;
}
/* release i2c */
rc = felica_i2c_release();
if (rc)
{
FELICA_DEBUG_MSG("[FELICA_I2C] ERROR - felica_i2c_release : %d \n",rc);
goto ERROR;
}
set_fs(old_fs);
// set_felica_i2c_status(I2C_STATUS_NO_USE);
set_felica_i2c_status(I2C_STATUS_READY);
return 0;
ERROR:
// set_felica_i2c_status(I2C_STATUS_NO_USE);
set_felica_i2c_status(I2C_STATUS_READY);
return rc;
}