$RuOBSD: radio.9,v 1.3 2001/10/26 05:38:44 form Exp $
Copyright (c) Maxim Tsyplakov <tm@oganer.net>
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.Dd $Mdocdate: August 31 2016 $ .Dt RADIO 9 .Os .Sh NAME .Nm radio .Nd interface between low and high level radio drivers .Sh 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 .Va radio_hw_if structure. d -literal 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); }; .Ed
p The high level radio driver attaches to the low level driver when the latter calls .Va radio_attach_mi . This call should be d -literal .Ft void .Fn radio_attach_mi "const struct radio_hw_if *rhwp" "void *hdlp" \ "struct device * dev" .Ed
p The .Va radio_hw_if struct is as shown above. The .Va hdlp argument is a handle to some low level data structure. It is sent as the first argument to all the functions in .Va radio_hw_if when the high level driver calls them. .Va dev is the device struct for the hardware device.
p The fields of .Va radio_hw_if are described in some more detail below. d -literal .Ft int .Fn 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. .Ft int .Fn 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. .Ft int .Fn get_info "void *" "struct radio_info *" Fill the radio_info struct. Returns 0 on success, otherwise an error code. .Ft int .Fn set_info "void *" "struct radio_info *" Set values from the radio_info struct. Returns 0 on success, otherwise an error code. .Ft int .Fn search "void *" "int" Returns 0 on success, otherwise an error code. .Ed .Sh SEE ALSO .Xr radio 4 .Sh HISTORY The .Nm device driver appeared in .Ox 3.0 . .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Vladimir Popov Aq Mt jumbo@narod.ru and .An Maxim Tsyplakov Aq Mt tm@oganer.net . The man page was written by .An Maxim Tsyplakov Aq Mt tm@oganer.net .