Maxim Integrated 73M1822/73M1922 Control Module - Manual (Page 26)

73M1822/73M1922 Control Module User Guide UG_1x22_053
26 Rev. 1.0
6.1.5 M1X22_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 M1X22_PHONE_VOLUME_SET
_IOWR(0xA4,0xCA,unsigned int)
Prototype
int ioctl (
int chan_fd,
int M1X22_PHONE_VOLUME_SET,
unsigned long param );
Parameters
Data Type Name Description
int chan_fd Channel descriptor.
int M1X22_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.