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