linux/drivers/net/ethernet/dec/tulip/media.c

/*
	drivers/net/ethernet/dec/tulip/media.c

	Copyright 2000,2001  The Linux Kernel Team
	Written/copyright 1994-2001 by Donald Becker.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

	Please submit bugs to http://bugzilla.kernel.org/ .
*/

#include <linux/kernel.h>
#include <linux/mii.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include "tulip.h"


/* The maximum data clock rate is 2.5 Mhz.  The minimum timing is usually
   met by back-to-back PCI I/O cycles, but we insert a delay to avoid
   "overclocking" issues or future 66Mhz PCI. */
#define mdio_delay() …

/* Read and write the MII registers using software-generated serial
   MDIO protocol.  It is just different enough from the EEPROM protocol
   to not share code.  The maxium data clock rate is 2.5 Mhz. */
#define MDIO_SHIFT_CLK …
#define MDIO_DATA_WRITE0 …
#define MDIO_DATA_WRITE1 …
#define MDIO_ENB …
#define MDIO_ENB_IN …
#define MDIO_DATA_READ …

static const unsigned char comet_miireg2offset[32] = …;


/* MII transceiver control section.
   Read and write the MII registers using software-generated serial
   MDIO protocol.
   See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management functions")
   or DP83840A data sheet for more details.
   */

int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
{ … }

void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int val)
{ … }


/* Set up the transceiver control registers for the selected media type. */
void tulip_select_media(struct net_device *dev, int startup)
{ … }

/*
  Check the MII negotiated duplex and change the CSR6 setting if
  required.
  Return 0 if everything is OK.
  Return < 0 if the transceiver is missing or has no link beat.
  */
int tulip_check_duplex(struct net_device *dev)
{ … }

void tulip_find_mii(struct net_device *dev, int board_idx)
{ … }