121 lines
2.5 KiB
C
121 lines
2.5 KiB
C
#ifndef _IPXE_MII_H
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#define _IPXE_MII_H
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/** @file
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*
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* Media Independent Interface
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <mii.h>
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#include <ipxe/netdevice.h>
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struct mii_interface;
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/** MII interface operations */
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struct mii_operations {
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/**
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* Read from MII register
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*
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* @v mii MII interface
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* @v reg Register address
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* @ret data Data read, or negative error
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*/
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int ( * read ) ( struct mii_interface *mii, unsigned int reg );
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/**
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* Write to MII register
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*
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* @v mii MII interface
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* @v reg Register address
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* @v data Data to write
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* @ret rc Return status code
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*/
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int ( * write ) ( struct mii_interface *mii, unsigned int reg,
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unsigned int data );
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};
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/** An MII interface */
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struct mii_interface {
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/** Interface operations */
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struct mii_operations *op;
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};
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/**
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* Initialise MII interface
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*
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* @v mii MII interface
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* @v op MII interface operations
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*/
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static inline __attribute__ (( always_inline )) void
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mii_init ( struct mii_interface *mii, struct mii_operations *op ) {
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mii->op = op;
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}
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/**
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* Read from MII register
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*
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* @v mii MII interface
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* @v reg Register address
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* @ret data Data read, or negative error
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*/
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static inline __attribute__ (( always_inline )) int
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mii_read ( struct mii_interface *mii, unsigned int reg ) {
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return mii->op->read ( mii, reg );
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}
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/**
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* Write to MII register
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*
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* @v mii MII interface
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* @v reg Register address
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* @v data Data to write
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* @ret rc Return status code
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*/
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static inline __attribute__ (( always_inline )) int
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mii_write ( struct mii_interface *mii, unsigned int reg, unsigned int data ) {
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return mii->op->write ( mii, reg, data );
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}
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/**
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* Dump MII registers (for debugging)
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*
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* @v mii MII interface
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*/
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static inline void
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mii_dump ( struct mii_interface *mii ) {
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unsigned int i;
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int data;
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/* Do nothing unless debug output is enabled */
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if ( ! DBG_LOG )
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return;
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/* Dump basic MII register set */
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for ( i = 0 ; i < 16 ; i++ ) {
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if ( ( i % 8 ) == 0 ) {
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DBGC ( mii, "MII %p registers %02x-%02x:",
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mii, i, ( i + 7 ) );
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}
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data = mii_read ( mii, i );
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if ( data >= 0 ) {
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DBGC ( mii, " %04x", data );
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} else {
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DBGC ( mii, " XXXX" );
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}
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if ( ( i % 8 ) == 7 )
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DBGC ( mii, "\n" );
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}
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}
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/** Maximum time to wait for a reset, in milliseconds */
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#define MII_RESET_MAX_WAIT_MS 500
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extern int mii_restart ( struct mii_interface *mii );
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extern int mii_reset ( struct mii_interface *mii );
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extern int mii_check_link ( struct mii_interface *mii,
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struct net_device *netdev );
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#endif /* _IPXE_MII_H */
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