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RADIO(9) Kernel Developer's Manual RADIO(9)

NAME

radiointerface between low and high level radio drivers

DESCRIPTION

The radio device driver is divided into a high level, hardware independent layer, and a low level hardware dependent layer. The interface between these is the radio_hw_if structure.
struct radio_hw_if { 
	int	(*open)(void *, int, int, struct proc *); 
	int	(*close)(void *, int, int, struct proc *); 
	int     (*get_info)(void *, struct radio_info *); 
	int     (*set_info)(void *, struct radio_info *); 
	int     (*search)(void *, int); 
};
The high level radio driver attaches to the low level driver when the latter calls radio_attach_mi. This call should be
void 
radio_attach_mi(struct radio_hw_if *rhwp, void *hdlp, struct device * dev)
The radio_hw_if struct is as shown above. The hdlp argument is a handle to some low level data structure. It is sent as the first argument to all the functions in radio_hw_if when the high level driver calls them. dev is the device struct for the hardware device.
The fields of radio_hw_if are described in some more detail below.
int 
open(void *, int flags, int fmt, struct proc *p) 
  Optional. 
  Is called when the radio device is opened. 
  Returns 0 on success, otherwise an error code. 
 
int 
close(void *, int flags, int fmt, struct proc *p) 
  Optional. 
  Is called when the radio device is closed. 
  Returns 0 on success, otherwise an error code. 
 
int 
get_info(void *, struct radio_info *) 
  Fill the radio_info struct. 
  Returns 0 on success, otherwise an error code. 
 
int 
set_info(void *, struct radio_info *) 
  Set values from the radio_info struct. 
  Returns 0 on success, otherwise an error code. 
 
int 
search(void *, int) 
  Returns 0 on success, otherwise an error code.

SEE ALSO

radio(4)

HISTORY

The radio device driver appeared in OpenBSD 3.0.

AUTHORS

The radio driver was written by Vladimir Popov <jumbo@narod.ru> and Maxim Tsyplakov <tm@oganer.net>. The man page was written by Maxim Tsyplakov <tm@oganer.net>.
August 31, 2016 OpenBSD-current