-#define GL_OK 0
-#define GL_ELIBUSB -1
-#define GL_EOPEN -2
-#define GL_ESETCONFIG -3
-#define GL_ECLAIM -4
-
-int gl_write_address(libusb_device_handle *devh, unsigned int address);
-int gl_write_data(libusb_device_handle *devh, unsigned int val);
-int gl_read_data(libusb_device_handle *devh);
-int gl_read_bulk(libusb_device_handle *devh, void *buffer, unsigned int size);
-int gl_reg_write(libusb_device_handle *devh, unsigned int reg,
- unsigned int val);
-int gl_reg_read(libusb_device_handle *devh, unsigned int reg);
+SR_PRIV int gl_read_bulk(libusb_device_handle *devh, void *buffer,
+ unsigned int size);
+SR_PRIV int gl_reg_write(libusb_device_handle *devh, unsigned int reg,
+ unsigned int val);
+SR_PRIV int gl_reg_read(libusb_device_handle *devh, unsigned int reg);