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#ifndef _IPXE_MII_H
#define _IPXE_MII_H
/** @file
*
* Media Independent Interface
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <mii.h>
#include <ipxe/netdevice.h>
struct mii_interface;
/** MII interface operations */
struct mii_operations {
/**
* Read from MII register
*
* @v mdio MII interface
* @v phy PHY address
* @v reg Register address
* @ret data Data read, or negative error
*/
int ( * read ) ( struct mii_interface *mdio, unsigned int phy,
unsigned int reg );
/**
* Write to MII register
*
* @v mdio MII interface
* @v phy PHY address
* @v reg Register address
* @v data Data to write
* @ret rc Return status code
*/
int ( * write ) ( struct mii_interface *mdio, unsigned int phy,
unsigned int reg, unsigned int data );
};
/** An MII interface */
struct mii_interface {
/** Interface operations */
struct mii_operations *op;
};
/** An MII device */
struct mii_device {
/** MII interface */
struct mii_interface *mdio;
/** PHY address */
unsigned int address;
};
/**
* Initialise MII interface
*
* @v mdio MII interface
* @v op MII interface operations
*/
static inline __attribute__ (( always_inline )) void
mdio_init ( struct mii_interface *mdio, struct mii_operations *op ) {
mdio->op = op;
}
/**
* Initialise MII device
*
* @v mii MII device
* @v mdio MII interface
* @v address PHY address
*/
static inline __attribute__ (( always_inline )) void
mii_init ( struct mii_device *mii, struct mii_interface *mdio,
unsigned int address ) {
mii->mdio = mdio;
mii->address = address;
}
/**
* Read from MII register
*
* @v mii MII device
* @v reg Register address
* @ret data Data read, or negative error
*/
static inline __attribute__ (( always_inline )) int
mii_read ( struct mii_device *mii, unsigned int reg ) {
struct mii_interface *mdio = mii->mdio;
return mdio->op->read ( mdio, mii->address, reg );
}
/**
* Write to MII register
*
* @v mii MII device
* @v reg Register address
* @v data Data to write
* @ret rc Return status code
*/
static inline __attribute__ (( always_inline )) int
mii_write ( struct mii_device *mii, unsigned int reg, unsigned int data ) {
struct mii_interface *mdio = mii->mdio;
return mdio->op->write ( mdio, mii->address, reg, data );
}
/**
* Dump MII registers (for debugging)
*
* @v mii MII device
*/
static inline void
mii_dump ( struct mii_device *mii ) {
unsigned int i;
int data;
/* Do nothing unless debug output is enabled */
if ( ! DBG_LOG )
return;
/* Dump basic MII register set */
for ( i = 0 ; i < 16 ; i++ ) {
if ( ( i % 8 ) == 0 ) {
DBGC ( mii, "MII %p registers %02x-%02x:",
mii, i, ( i + 7 ) );
}
data = mii_read ( mii, i );
if ( data >= 0 ) {
DBGC ( mii, " %04x", data );
} else {
DBGC ( mii, " XXXX" );
}
if ( ( i % 8 ) == 7 )
DBGC ( mii, "\n" );
}
}
/** Maximum time to wait for a reset, in milliseconds */
#define MII_RESET_MAX_WAIT_MS 500
/** Maximum PHY address */
#define MII_MAX_PHY_ADDRESS 31
extern int mii_restart ( struct mii_device *mii );
extern int mii_reset ( struct mii_device *mii );
extern int mii_check_link ( struct mii_device *mii,
struct net_device *netdev );
extern int mii_find ( struct mii_device *mii );
#endif /* _IPXE_MII_H */
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