Maxim Integrated 73M1866B/73M1966B Reference Driver - Manual (Page 35)

UG_1x66B_015 73M1866B/73M1966B Reference Driver User Guide
Rev. 2.7 35
6.1.17 M1966_PHONE_VOLUME_SET
Description
The gain of both transmit and receive path can be controlled by digital and/or analog means. This IOCTL
provides an easy way to set the transmit and receive gain.
#define M1966_PHONE_VOLUME_SET
_IOWR(0xA4,0xCA,unsigned int)
Prototype
int ioctl (
int chan_fd,
int M1966_PHONE_VOLUME_SET,
unsigned long param );
Parameters
Data Type Name Description
int chan_fd Channel descriptor.
int M1966_PHONE_VOLUME_SET I/O control identifier for this operation.
unsigned long param Pointer to structure txrx_gain (see Section
7.4 ).
Return Values
Data Type Description
int 0 – Successful.
(-1) – Failed.