int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len);
int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len);
int gsc_info(int verbose);
int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len);
int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len);
int gsc_info(int verbose);