u-boot/net/eth.c
Pavel Machek 75d9a45cb0 Ethernet: let user know if there is no valid ethernet address
Improve error messages in case of invalid/unset ethernet addresses.

Signed-off-by: Pavel Machek <pavel@denx.de>
2014-07-22 07:44:28 -04:00

544 lines
11 KiB
C

/*
* (C) Copyright 2001-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <net.h>
#include <miiphy.h>
#include <phy.h>
#include <asm/errno.h>
void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
{
char *end;
int i;
for (i = 0; i < 6; ++i) {
enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
if (addr)
addr = (*end) ? end + 1 : end;
}
}
int eth_getenv_enetaddr(char *name, uchar *enetaddr)
{
eth_parse_enetaddr(getenv(name), enetaddr);
return is_valid_ether_addr(enetaddr);
}
int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
{
char buf[20];
sprintf(buf, "%pM", enetaddr);
return setenv(name, buf);
}
int eth_getenv_enetaddr_by_index(const char *base_name, int index,
uchar *enetaddr)
{
char enetvar[32];
sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
return eth_getenv_enetaddr(enetvar, enetaddr);
}
static inline int eth_setenv_enetaddr_by_index(const char *base_name, int index,
uchar *enetaddr)
{
char enetvar[32];
sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
return eth_setenv_enetaddr(enetvar, enetaddr);
}
static int eth_mac_skip(int index)
{
char enetvar[15];
char *skip_state;
sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
return ((skip_state = getenv(enetvar)) != NULL);
}
/*
* CPU and board-specific Ethernet initializations. Aliased function
* signals caller to move on
*/
static int __def_eth_init(bd_t *bis)
{
return -1;
}
int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
#ifdef CONFIG_API
static struct {
uchar data[PKTSIZE];
int length;
} eth_rcv_bufs[PKTBUFSRX];
static unsigned int eth_rcv_current, eth_rcv_last;
#endif
static struct eth_device *eth_devices;
struct eth_device *eth_current;
struct eth_device *eth_get_dev_by_name(const char *devname)
{
struct eth_device *dev, *target_dev;
BUG_ON(devname == NULL);
if (!eth_devices)
return NULL;
dev = eth_devices;
target_dev = NULL;
do {
if (strcmp(devname, dev->name) == 0) {
target_dev = dev;
break;
}
dev = dev->next;
} while (dev != eth_devices);
return target_dev;
}
struct eth_device *eth_get_dev_by_index(int index)
{
struct eth_device *dev, *target_dev;
if (!eth_devices)
return NULL;
dev = eth_devices;
target_dev = NULL;
do {
if (dev->index == index) {
target_dev = dev;
break;
}
dev = dev->next;
} while (dev != eth_devices);
return target_dev;
}
int eth_get_dev_index(void)
{
if (!eth_current)
return -1;
return eth_current->index;
}
static void eth_current_changed(void)
{
char *act = getenv("ethact");
/* update current ethernet name */
if (eth_current) {
if (act == NULL || strcmp(act, eth_current->name) != 0)
setenv("ethact", eth_current->name);
}
/*
* remove the variable completely if there is no active
* interface
*/
else if (act != NULL)
setenv("ethact", NULL);
}
int eth_address_set(unsigned char *addr)
{
return memcmp(addr, "\0\0\0\0\0\0", 6);
}
int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
int eth_number)
{
unsigned char env_enetaddr[6];
int ret = 0;
eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
if (eth_address_set(env_enetaddr)) {
if (eth_address_set(dev->enetaddr) &&
memcmp(dev->enetaddr, env_enetaddr, 6)) {
printf("\nWarning: %s MAC addresses don't match:\n",
dev->name);
printf("Address in SROM is %pM\n",
dev->enetaddr);
printf("Address in environment is %pM\n",
env_enetaddr);
}
memcpy(dev->enetaddr, env_enetaddr, 6);
} else if (is_valid_ether_addr(dev->enetaddr)) {
eth_setenv_enetaddr_by_index(base_name, eth_number,
dev->enetaddr);
printf("\nWarning: %s using MAC address from net device\n",
dev->name);
} else if (!(eth_address_set(dev->enetaddr))) {
printf("\nError: %s address not set.\n",
dev->name);
return -EINVAL;
}
if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
if (!is_valid_ether_addr(dev->enetaddr)) {
printf("\nError: %s address %pM illegal value\n",
dev->name, dev->enetaddr);
return -EINVAL;
}
ret = dev->write_hwaddr(dev);
if (ret)
printf("\nWarning: %s failed to set MAC address\n", dev->name);
}
return ret;
}
int eth_register(struct eth_device *dev)
{
struct eth_device *d;
static int index;
assert(strlen(dev->name) < sizeof(dev->name));
if (!eth_devices) {
eth_current = eth_devices = dev;
eth_current_changed();
} else {
for (d = eth_devices; d->next != eth_devices; d = d->next)
;
d->next = dev;
}
dev->state = ETH_STATE_INIT;
dev->next = eth_devices;
dev->index = index++;
return 0;
}
int eth_unregister(struct eth_device *dev)
{
struct eth_device *cur;
/* No device */
if (!eth_devices)
return -1;
for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
cur = cur->next)
;
/* Device not found */
if (cur->next != dev)
return -1;
cur->next = dev->next;
if (eth_devices == dev)
eth_devices = dev->next == eth_devices ? NULL : dev->next;
if (eth_current == dev) {
eth_current = eth_devices;
eth_current_changed();
}
return 0;
}
static void eth_env_init(bd_t *bis)
{
const char *s;
if ((s = getenv("bootfile")) != NULL)
copy_filename(BootFile, s, sizeof(BootFile));
}
int eth_initialize(bd_t *bis)
{
int num_devices = 0;
eth_devices = NULL;
eth_current = NULL;
bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
miiphy_init();
#endif
#ifdef CONFIG_PHYLIB
phy_init();
#endif
eth_env_init(bis);
/*
* If board-specific initialization exists, call it.
* If not, call a CPU-specific one
*/
if (board_eth_init != __def_eth_init) {
if (board_eth_init(bis) < 0)
printf("Board Net Initialization Failed\n");
} else if (cpu_eth_init != __def_eth_init) {
if (cpu_eth_init(bis) < 0)
printf("CPU Net Initialization Failed\n");
} else
printf("Net Initialization Skipped\n");
if (!eth_devices) {
puts("No ethernet found.\n");
bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
} else {
struct eth_device *dev = eth_devices;
char *ethprime = getenv("ethprime");
bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
do {
if (dev->index)
puts(", ");
printf("%s", dev->name);
if (ethprime && strcmp(dev->name, ethprime) == 0) {
eth_current = dev;
puts(" [PRIME]");
}
if (strchr(dev->name, ' '))
puts("\nWarning: eth device name has a space!"
"\n");
eth_write_hwaddr(dev, "eth", dev->index);
dev = dev->next;
num_devices++;
} while (dev != eth_devices);
eth_current_changed();
putc('\n');
}
return num_devices;
}
#ifdef CONFIG_MCAST_TFTP
/* Multicast.
* mcast_addr: multicast ipaddr from which multicast Mac is made
* join: 1=join, 0=leave.
*/
int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
{
u8 mcast_mac[6];
if (!eth_current || !eth_current->mcast)
return -1;
mcast_mac[5] = htonl(mcast_ip) & 0xff;
mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
mcast_mac[2] = 0x5e;
mcast_mac[1] = 0x0;
mcast_mac[0] = 0x1;
return eth_current->mcast(eth_current, mcast_mac, join);
}
/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
* and this is the ethernet-crc method needed for TSEC -- and perhaps
* some other adapter -- hash tables
*/
#define CRCPOLY_LE 0xedb88320
u32 ether_crc(size_t len, unsigned char const *p)
{
int i;
u32 crc;
crc = ~0;
while (len--) {
crc ^= *p++;
for (i = 0; i < 8; i++)
crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
}
/* an reverse the bits, cuz of way they arrive -- last-first */
crc = (crc >> 16) | (crc << 16);
crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
return crc;
}
#endif
int eth_init(bd_t *bis)
{
struct eth_device *old_current, *dev;
if (!eth_current) {
puts("No ethernet found.\n");
return -1;
}
/* Sync environment with network devices */
dev = eth_devices;
do {
uchar env_enetaddr[6];
if (eth_getenv_enetaddr_by_index("eth", dev->index,
env_enetaddr))
memcpy(dev->enetaddr, env_enetaddr, 6);
dev = dev->next;
} while (dev != eth_devices);
old_current = eth_current;
do {
debug("Trying %s\n", eth_current->name);
if (eth_current->init(eth_current, bis) >= 0) {
eth_current->state = ETH_STATE_ACTIVE;
return 0;
}
debug("FAIL\n");
eth_try_another(0);
} while (old_current != eth_current);
return -1;
}
void eth_halt(void)
{
if (!eth_current)
return;
eth_current->halt(eth_current);
eth_current->state = ETH_STATE_PASSIVE;
}
int eth_send(void *packet, int length)
{
if (!eth_current)
return -1;
return eth_current->send(eth_current, packet, length);
}
int eth_rx(void)
{
if (!eth_current)
return -1;
return eth_current->recv(eth_current);
}
#ifdef CONFIG_API
static void eth_save_packet(void *packet, int length)
{
char *p = packet;
int i;
if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
return;
if (PKTSIZE < length)
return;
for (i = 0; i < length; i++)
eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
eth_rcv_bufs[eth_rcv_last].length = length;
eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
}
int eth_receive(void *packet, int length)
{
char *p = packet;
void *pp = push_packet;
int i;
if (eth_rcv_current == eth_rcv_last) {
push_packet = eth_save_packet;
eth_rx();
push_packet = pp;
if (eth_rcv_current == eth_rcv_last)
return -1;
}
length = min(eth_rcv_bufs[eth_rcv_current].length, length);
for (i = 0; i < length; i++)
p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
return length;
}
#endif /* CONFIG_API */
void eth_try_another(int first_restart)
{
static struct eth_device *first_failed;
char *ethrotate;
/*
* Do not rotate between network interfaces when
* 'ethrotate' variable is set to 'no'.
*/
ethrotate = getenv("ethrotate");
if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
return;
if (!eth_current)
return;
if (first_restart)
first_failed = eth_current;
eth_current = eth_current->next;
eth_current_changed();
if (first_failed == eth_current)
NetRestartWrap = 1;
}
void eth_set_current(void)
{
static char *act;
static int env_changed_id;
struct eth_device *old_current;
int env_id;
if (!eth_current) /* XXX no current */
return;
env_id = get_env_id();
if ((act == NULL) || (env_changed_id != env_id)) {
act = getenv("ethact");
env_changed_id = env_id;
}
if (act != NULL) {
old_current = eth_current;
do {
if (strcmp(eth_current->name, act) == 0)
return;
eth_current = eth_current->next;
} while (old_current != eth_current);
}
eth_current_changed();
}
char *eth_get_name(void)
{
return eth_current ? eth_current->name : "unknown";
}