u-boot/net/eth_legacy.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

440 lines
8.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2001-2015
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* Joe Hershberger, National Instruments
*/
#include <common.h>
#include <command.h>
#include <environment.h>
#include <net.h>
#include <phy.h>
#include <linux/errno.h>
#include "eth_internal.h"
DECLARE_GLOBAL_DATA_PTR;
/*
* 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;
void eth_set_current_to_next(void)
{
eth_current = eth_current->next;
}
void eth_set_dev(struct eth_device *dev)
{
eth_current = dev;
}
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 int on_ethaddr(const char *name, const char *value, enum env_op op,
int flags)
{
int index;
struct eth_device *dev;
if (!eth_devices)
return 0;
/* look for an index after "eth" */
index = simple_strtoul(name + 3, NULL, 10);
dev = eth_devices;
do {
if (dev->index == index) {
switch (op) {
case env_op_create:
case env_op_overwrite:
eth_parse_enetaddr(value, dev->enetaddr);
eth_write_hwaddr(dev, "eth", dev->index);
break;
case env_op_delete:
memset(dev->enetaddr, 0, ARP_HLEN);
}
}
dev = dev->next;
} while (dev != eth_devices);
return 0;
}
U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
int eth_number)
{
unsigned char env_enetaddr[ARP_HLEN];
int ret = 0;
eth_env_get_enetaddr_by_index(base_name, eth_number, env_enetaddr);
if (!is_zero_ethaddr(env_enetaddr)) {
if (!is_zero_ethaddr(dev->enetaddr) &&
memcmp(dev->enetaddr, env_enetaddr, ARP_HLEN)) {
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, ARP_HLEN);
} else if (is_valid_ethaddr(dev->enetaddr)) {
eth_env_set_enetaddr_by_index(base_name, eth_number,
dev->enetaddr);
} else if (is_zero_ethaddr(dev->enetaddr)) {
#ifdef CONFIG_NET_RANDOM_ETHADDR
net_random_ethaddr(dev->enetaddr);
printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
dev->name, eth_number, dev->enetaddr);
#else
printf("\nError: %s address not set.\n",
dev->name);
return -EINVAL;
#endif
}
if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
if (!is_valid_ethaddr(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_devices = dev;
eth_current = 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 -ENODEV;
for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
cur = cur->next)
;
/* Device not found */
if (cur->next != dev)
return -ENODEV;
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;
}
int eth_initialize(void)
{
int num_devices = 0;
eth_devices = NULL;
eth_current = NULL;
eth_common_init();
/*
* 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(gd->bd) < 0)
printf("Board Net Initialization Failed\n");
} else if (cpu_eth_init != __def_eth_init) {
if (cpu_eth_init(gd->bd) < 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 = env_get("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(struct in_addr mcast_ip, int join)
{
u8 mcast_mac[ARP_HLEN];
if (!eth_current || !eth_current->mcast)
return -1;
mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;
mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff;
mcast_mac[3] = (htonl(mcast_ip.s_addr)>>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(void)
{
struct eth_device *old_current;
if (!eth_current) {
puts("No ethernet found.\n");
return -ENODEV;
}
old_current = eth_current;
do {
debug("Trying %s\n", eth_current->name);
if (eth_current->init(eth_current, gd->bd) >= 0) {
eth_current->state = ETH_STATE_ACTIVE;
return 0;
}
debug("FAIL\n");
eth_try_another(0);
} while (old_current != eth_current);
return -ETIMEDOUT;
}
void eth_halt(void)
{
if (!eth_current)
return;
eth_current->halt(eth_current);
eth_current->state = ETH_STATE_PASSIVE;
}
int eth_is_active(struct eth_device *dev)
{
return dev && dev->state == ETH_STATE_ACTIVE;
}
int eth_send(void *packet, int length)
{
if (!eth_current)
return -ENODEV;
return eth_current->send(eth_current, packet, length);
}
int eth_rx(void)
{
if (!eth_current)
return -ENODEV;
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 */