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d9785c14bf
ethaddr is assigned). Initialization moved from miiphy_register() to eth_initialize(). Based on initial patch for 4xx platform by Matthias Fuchs.
474 lines
11 KiB
C
474 lines
11 KiB
C
/*
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* (C) Copyright 2001
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* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* This provides a bit-banged interface to the ethernet MII management
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* channel.
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*/
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#include <common.h>
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#include <miiphy.h>
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#if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
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#include <asm/types.h>
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#include <linux/list.h>
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#include <malloc.h>
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#include <net.h>
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/* local debug macro */
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#define MII_DEBUG
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#undef MII_DEBUG
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#undef debug
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#ifdef MII_DEBUG
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#define debug(fmt,args...) printf (fmt ,##args)
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#else
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#define debug(fmt,args...)
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#endif /* MII_DEBUG */
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struct mii_dev {
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struct list_head link;
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char *name;
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int (* read)(char *devname, unsigned char addr,
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unsigned char reg, unsigned short *value);
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int (* write)(char *devname, unsigned char addr,
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unsigned char reg, unsigned short value);
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};
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static struct list_head mii_devs;
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static struct mii_dev *current_mii;
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/*****************************************************************************
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*
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* Initialize global data. Need to be called before any other miiphy routine.
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*/
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void miiphy_init()
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{
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INIT_LIST_HEAD(&mii_devs);
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current_mii = NULL;
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}
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/*****************************************************************************
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*
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* Register read and write MII access routines for the device <name>.
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*/
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void miiphy_register(char *name,
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int (* read)(char *devname, unsigned char addr,
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unsigned char reg, unsigned short *value),
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int (* write)(char *devname, unsigned char addr,
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unsigned char reg, unsigned short value))
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{
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struct list_head *entry;
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struct mii_dev *new_dev;
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struct mii_dev *miidev;
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unsigned int name_len;
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/* check if we have unique name */
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list_for_each(entry, &mii_devs) {
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miidev = list_entry(entry, struct mii_dev, link);
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if (strcmp(miidev->name, name) == 0) {
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printf("miiphy_register: non unique device name '%s'\n",
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name);
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return;
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}
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}
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/* allocate memory */
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name_len = strlen(name);
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new_dev = (struct mii_dev *)malloc(sizeof(struct mii_dev) + name_len + 1);
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if(new_dev == NULL) {
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printf("miiphy_register: cannot allocate memory for '%s'\n",
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name);
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return;
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}
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memset(new_dev, 0, sizeof(struct mii_dev) + name_len);
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/* initalize mii_dev struct fields */
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INIT_LIST_HEAD(&new_dev->link);
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new_dev->read = read;
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new_dev->write = write;
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new_dev->name = (char *)(new_dev + 1);
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strncpy(new_dev->name, name, name_len);
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new_dev->name[name_len] = '\0';
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debug("miiphy_register: added '%s', read=0x%08lx, write=0x%08lx\n",
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new_dev->name, new_dev->read, new_dev->write);
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/* add it to the list */
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list_add_tail(&new_dev->link, &mii_devs);
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if (!current_mii)
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current_mii = new_dev;
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}
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int miiphy_set_current_dev(char *devname)
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{
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struct list_head *entry;
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struct mii_dev *dev;
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list_for_each(entry, &mii_devs) {
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dev = list_entry(entry, struct mii_dev, link);
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if (strcmp(devname, dev->name) == 0) {
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current_mii = dev;
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return 0;
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}
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}
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printf("No such device: %s\n", devname);
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return 1;
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}
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char *miiphy_get_current_dev()
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{
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if (current_mii)
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return current_mii->name;
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return NULL;
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}
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/*****************************************************************************
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*
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* Read to variable <value> from the PHY attached to device <devname>,
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* use PHY address <addr> and register <reg>.
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*
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* Returns:
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* 0 on success
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*/
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int miiphy_read(char *devname, unsigned char addr, unsigned char reg,
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unsigned short *value)
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{
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struct list_head *entry;
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struct mii_dev *dev;
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int found_dev = 0;
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int read_ret = 0;
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if (!devname) {
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printf("NULL device name!\n");
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return 1;
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}
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list_for_each(entry, &mii_devs) {
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dev = list_entry(entry, struct mii_dev, link);
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if (strcmp(devname, dev->name) == 0) {
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found_dev = 1;
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read_ret = dev->read(devname, addr, reg, value);
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break;
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}
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}
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if (found_dev == 0)
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printf("No such device: %s\n", devname);
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return ((found_dev) ? read_ret : 1);
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}
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/*****************************************************************************
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*
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* Write <value> to the PHY attached to device <devname>,
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* use PHY address <addr> and register <reg>.
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*
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* Returns:
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* 0 on success
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*/
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int miiphy_write(char *devname, unsigned char addr, unsigned char reg,
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unsigned short value)
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{
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struct list_head *entry;
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struct mii_dev *dev;
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int found_dev = 0;
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int write_ret = 0;
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if (!devname) {
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printf("NULL device name!\n");
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return 1;
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}
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list_for_each(entry, &mii_devs) {
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dev = list_entry(entry, struct mii_dev, link);
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if (strcmp(devname, dev->name) == 0) {
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found_dev = 1;
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write_ret = dev->write(devname, addr, reg, value);
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break;
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}
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}
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if (found_dev == 0)
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printf("No such device: %s\n", devname);
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return ((found_dev) ? write_ret : 1);
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}
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/*****************************************************************************
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*
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* Print out list of registered MII capable devices.
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*/
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void miiphy_listdev(void)
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{
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struct list_head *entry;
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struct mii_dev *dev;
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puts("MII devices: ");
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list_for_each(entry, &mii_devs) {
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dev = list_entry(entry, struct mii_dev, link);
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printf("'%s' ", dev->name);
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}
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puts("\n");
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if (current_mii)
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printf("Current device: '%s'\n", current_mii->name);
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}
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/*****************************************************************************
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*
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* Read the OUI, manufacture's model number, and revision number.
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*
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* OUI: 22 bits (unsigned int)
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* Model: 6 bits (unsigned char)
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* Revision: 4 bits (unsigned char)
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*
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* Returns:
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* 0 on success
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*/
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int miiphy_info (char *devname,
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unsigned char addr,
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unsigned int *oui,
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unsigned char *model, unsigned char *rev)
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{
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unsigned int reg = 0;
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unsigned short tmp;
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if (miiphy_read (devname, addr, PHY_PHYIDR2, &tmp) != 0) {
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#ifdef DEBUG
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puts ("PHY ID register 2 read failed\n");
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#endif
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return (-1);
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}
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reg = tmp;
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#ifdef DEBUG
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printf ("PHY_PHYIDR2 @ 0x%x = 0x%04x\n", addr, reg);
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#endif
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if (reg == 0xFFFF) {
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/* No physical device present at this address */
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return (-1);
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}
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if (miiphy_read (devname, addr, PHY_PHYIDR1, &tmp) != 0) {
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#ifdef DEBUG
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puts ("PHY ID register 1 read failed\n");
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#endif
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return (-1);
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}
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reg |= tmp << 16;
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#ifdef DEBUG
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printf ("PHY_PHYIDR[1,2] @ 0x%x = 0x%08x\n", addr, reg);
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#endif
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*oui = ( reg >> 10);
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*model = (unsigned char) ((reg >> 4) & 0x0000003F);
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*rev = (unsigned char) ( reg & 0x0000000F);
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return (0);
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}
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/*****************************************************************************
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*
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* Reset the PHY.
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* Returns:
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* 0 on success
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*/
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int miiphy_reset (char *devname, unsigned char addr)
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{
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unsigned short reg;
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int loop_cnt;
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if (miiphy_read (devname, addr, PHY_BMCR, ®) != 0) {
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#ifdef DEBUG
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printf ("PHY status read failed\n");
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#endif
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return (-1);
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}
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if (miiphy_write (devname, addr, PHY_BMCR, reg | 0x8000) != 0) {
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#ifdef DEBUG
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puts ("PHY reset failed\n");
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#endif
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return (-1);
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}
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#ifdef CONFIG_PHY_RESET_DELAY
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udelay (CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
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#endif
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/*
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* Poll the control register for the reset bit to go to 0 (it is
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* auto-clearing). This should happen within 0.5 seconds per the
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* IEEE spec.
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*/
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loop_cnt = 0;
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reg = 0x8000;
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while (((reg & 0x8000) != 0) && (loop_cnt++ < 1000000)) {
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if (miiphy_read (devname, addr, PHY_BMCR, ®) != 0) {
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# ifdef DEBUG
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puts ("PHY status read failed\n");
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# endif
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return (-1);
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}
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}
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if ((reg & 0x8000) == 0) {
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return (0);
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} else {
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puts ("PHY reset timed out\n");
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return (-1);
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}
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return (0);
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}
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/*****************************************************************************
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*
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* Determine the ethernet speed (10/100).
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*/
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int miiphy_speed (char *devname, unsigned char addr)
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{
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unsigned short reg;
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#if defined(CONFIG_PHY_GIGE)
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if (miiphy_read (devname, addr, PHY_1000BTSR, ®)) {
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printf ("PHY 1000BT Status read failed\n");
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} else {
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if (reg != 0xFFFF) {
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if ((reg & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) !=0) {
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return (_1000BASET);
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}
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}
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}
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#endif /* CONFIG_PHY_GIGE */
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/* Check Basic Management Control Register first. */
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if (miiphy_read (devname, addr, PHY_BMCR, ®)) {
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puts ("PHY speed read failed, assuming 10bT\n");
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return (_10BASET);
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}
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/* Check if auto-negotiation is on. */
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if ((reg & PHY_BMCR_AUTON) != 0) {
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/* Get auto-negotiation results. */
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if (miiphy_read (devname, addr, PHY_ANLPAR, ®)) {
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puts ("PHY AN speed read failed, assuming 10bT\n");
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return (_10BASET);
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}
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if ((reg & PHY_ANLPAR_100) != 0) {
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return (_100BASET);
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} else {
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return (_10BASET);
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}
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}
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/* Get speed from basic control settings. */
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else if (reg & PHY_BMCR_100MB) {
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return (_100BASET);
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} else {
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return (_10BASET);
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}
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}
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/*****************************************************************************
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*
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* Determine full/half duplex.
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*/
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int miiphy_duplex (char *devname, unsigned char addr)
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{
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unsigned short reg;
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#if defined(CONFIG_PHY_GIGE)
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if (miiphy_read (devname, addr, PHY_1000BTSR, ®)) {
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printf ("PHY 1000BT Status read failed\n");
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} else {
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if ( (reg != 0xFFFF) &&
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(reg & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) ) {
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if ((reg & PHY_1000BTSR_1000FD) !=0) {
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return (FULL);
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} else {
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return (HALF);
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}
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}
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}
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#endif /* CONFIG_PHY_GIGE */
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/* Check Basic Management Control Register first. */
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if (miiphy_read (devname, addr, PHY_BMCR, ®)) {
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puts ("PHY duplex read failed, assuming half duplex\n");
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return (HALF);
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}
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/* Check if auto-negotiation is on. */
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if ((reg & PHY_BMCR_AUTON) != 0) {
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/* Get auto-negotiation results. */
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if (miiphy_read (devname, addr, PHY_ANLPAR, ®)) {
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puts ("PHY AN duplex read failed, assuming half duplex\n");
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return (HALF);
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}
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if ((reg & (PHY_ANLPAR_10FD | PHY_ANLPAR_TXFD)) != 0) {
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return (FULL);
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} else {
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return (HALF);
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}
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}
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/* Get speed from basic control settings. */
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else if (reg & PHY_BMCR_DPLX) {
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return (FULL);
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} else {
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return (HALF);
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}
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}
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#ifdef CFG_FAULT_ECHO_LINK_DOWN
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/*****************************************************************************
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*
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* Determine link status
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*/
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int miiphy_link (char *devname, unsigned char addr)
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{
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unsigned short reg;
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/* dummy read; needed to latch some phys */
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(void)miiphy_read(devname, addr, PHY_BMSR, ®);
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if (miiphy_read (devname, addr, PHY_BMSR, ®)) {
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puts ("PHY_BMSR read failed, assuming no link\n");
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return (0);
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}
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/* Determine if a link is active */
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if ((reg & PHY_BMSR_LS) != 0) {
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return (1);
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} else {
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return (0);
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}
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}
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#endif
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#endif /* CONFIG_MII || (CONFIG_COMMANDS & CFG_CMD_MII) */
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