440 lines
8.8 KiB
C
440 lines
8.8 KiB
C
/*
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* (C) Copyright 2001-2015
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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* Joe Hershberger, National Instruments
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <net.h>
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#include <phy.h>
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#include <linux/errno.h>
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#include "eth_internal.h"
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* CPU and board-specific Ethernet initializations. Aliased function
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* signals caller to move on
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*/
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static int __def_eth_init(bd_t *bis)
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{
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return -1;
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}
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int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
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int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
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#ifdef CONFIG_API
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static struct {
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uchar data[PKTSIZE];
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int length;
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} eth_rcv_bufs[PKTBUFSRX];
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static unsigned int eth_rcv_current, eth_rcv_last;
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#endif
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static struct eth_device *eth_devices;
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struct eth_device *eth_current;
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void eth_set_current_to_next(void)
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{
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eth_current = eth_current->next;
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}
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void eth_set_dev(struct eth_device *dev)
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{
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eth_current = dev;
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}
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struct eth_device *eth_get_dev_by_name(const char *devname)
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{
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struct eth_device *dev, *target_dev;
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BUG_ON(devname == NULL);
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if (!eth_devices)
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return NULL;
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dev = eth_devices;
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target_dev = NULL;
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do {
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if (strcmp(devname, dev->name) == 0) {
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target_dev = dev;
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break;
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}
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dev = dev->next;
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} while (dev != eth_devices);
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return target_dev;
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}
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struct eth_device *eth_get_dev_by_index(int index)
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{
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struct eth_device *dev, *target_dev;
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if (!eth_devices)
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return NULL;
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dev = eth_devices;
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target_dev = NULL;
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do {
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if (dev->index == index) {
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target_dev = dev;
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break;
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}
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dev = dev->next;
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} while (dev != eth_devices);
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return target_dev;
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}
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int eth_get_dev_index(void)
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{
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if (!eth_current)
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return -1;
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return eth_current->index;
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}
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static int on_ethaddr(const char *name, const char *value, enum env_op op,
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int flags)
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{
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int index;
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struct eth_device *dev;
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if (!eth_devices)
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return 0;
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/* look for an index after "eth" */
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index = simple_strtoul(name + 3, NULL, 10);
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dev = eth_devices;
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do {
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if (dev->index == index) {
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switch (op) {
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case env_op_create:
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case env_op_overwrite:
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eth_parse_enetaddr(value, dev->enetaddr);
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break;
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case env_op_delete:
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memset(dev->enetaddr, 0, 6);
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}
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}
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dev = dev->next;
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} while (dev != eth_devices);
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return 0;
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}
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U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
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int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
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int eth_number)
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{
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unsigned char env_enetaddr[6];
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int ret = 0;
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eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
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if (!is_zero_ethaddr(env_enetaddr)) {
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if (!is_zero_ethaddr(dev->enetaddr) &&
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memcmp(dev->enetaddr, env_enetaddr, 6)) {
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printf("\nWarning: %s MAC addresses don't match:\n",
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dev->name);
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printf("Address in SROM is %pM\n",
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dev->enetaddr);
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printf("Address in environment is %pM\n",
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env_enetaddr);
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}
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memcpy(dev->enetaddr, env_enetaddr, 6);
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} else if (is_valid_ethaddr(dev->enetaddr)) {
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eth_setenv_enetaddr_by_index(base_name, eth_number,
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dev->enetaddr);
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} else if (is_zero_ethaddr(dev->enetaddr)) {
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#ifdef CONFIG_NET_RANDOM_ETHADDR
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net_random_ethaddr(dev->enetaddr);
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printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
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dev->name, eth_number, dev->enetaddr);
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#else
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printf("\nError: %s address not set.\n",
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dev->name);
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return -EINVAL;
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#endif
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}
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if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
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if (!is_valid_ethaddr(dev->enetaddr)) {
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printf("\nError: %s address %pM illegal value\n",
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dev->name, dev->enetaddr);
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return -EINVAL;
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}
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ret = dev->write_hwaddr(dev);
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if (ret)
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printf("\nWarning: %s failed to set MAC address\n",
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dev->name);
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}
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return ret;
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}
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int eth_register(struct eth_device *dev)
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{
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struct eth_device *d;
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static int index;
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assert(strlen(dev->name) < sizeof(dev->name));
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if (!eth_devices) {
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eth_devices = dev;
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eth_current = dev;
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eth_current_changed();
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} else {
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for (d = eth_devices; d->next != eth_devices; d = d->next)
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;
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d->next = dev;
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}
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dev->state = ETH_STATE_INIT;
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dev->next = eth_devices;
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dev->index = index++;
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return 0;
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}
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int eth_unregister(struct eth_device *dev)
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{
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struct eth_device *cur;
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/* No device */
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if (!eth_devices)
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return -ENODEV;
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for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
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cur = cur->next)
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;
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/* Device not found */
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if (cur->next != dev)
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return -ENODEV;
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cur->next = dev->next;
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if (eth_devices == dev)
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eth_devices = dev->next == eth_devices ? NULL : dev->next;
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if (eth_current == dev) {
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eth_current = eth_devices;
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eth_current_changed();
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}
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return 0;
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}
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int eth_initialize(void)
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{
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int num_devices = 0;
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eth_devices = NULL;
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eth_current = NULL;
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eth_common_init();
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/*
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* If board-specific initialization exists, call it.
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* If not, call a CPU-specific one
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*/
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if (board_eth_init != __def_eth_init) {
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if (board_eth_init(gd->bd) < 0)
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printf("Board Net Initialization Failed\n");
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} else if (cpu_eth_init != __def_eth_init) {
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if (cpu_eth_init(gd->bd) < 0)
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printf("CPU Net Initialization Failed\n");
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} else {
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printf("Net Initialization Skipped\n");
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}
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if (!eth_devices) {
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puts("No ethernet found.\n");
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bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
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} else {
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struct eth_device *dev = eth_devices;
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char *ethprime = getenv("ethprime");
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bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
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do {
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if (dev->index)
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puts(", ");
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printf("%s", dev->name);
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if (ethprime && strcmp(dev->name, ethprime) == 0) {
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eth_current = dev;
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puts(" [PRIME]");
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}
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if (strchr(dev->name, ' '))
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puts("\nWarning: eth device name has a space!"
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"\n");
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eth_write_hwaddr(dev, "eth", dev->index);
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dev = dev->next;
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num_devices++;
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} while (dev != eth_devices);
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eth_current_changed();
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putc('\n');
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}
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return num_devices;
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}
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#ifdef CONFIG_MCAST_TFTP
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/* Multicast.
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* mcast_addr: multicast ipaddr from which multicast Mac is made
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* join: 1=join, 0=leave.
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*/
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int eth_mcast_join(struct in_addr mcast_ip, int join)
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{
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u8 mcast_mac[6];
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if (!eth_current || !eth_current->mcast)
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return -1;
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mcast_mac[5] = htonl(mcast_ip.s_addr) & 0xff;
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mcast_mac[4] = (htonl(mcast_ip.s_addr)>>8) & 0xff;
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mcast_mac[3] = (htonl(mcast_ip.s_addr)>>16) & 0x7f;
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mcast_mac[2] = 0x5e;
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mcast_mac[1] = 0x0;
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mcast_mac[0] = 0x1;
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return eth_current->mcast(eth_current, mcast_mac, join);
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}
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/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
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* and this is the ethernet-crc method needed for TSEC -- and perhaps
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* some other adapter -- hash tables
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*/
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#define CRCPOLY_LE 0xedb88320
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u32 ether_crc(size_t len, unsigned char const *p)
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{
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int i;
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u32 crc;
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crc = ~0;
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while (len--) {
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crc ^= *p++;
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for (i = 0; i < 8; i++)
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crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
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}
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/* an reverse the bits, cuz of way they arrive -- last-first */
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crc = (crc >> 16) | (crc << 16);
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crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
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crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
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crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
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crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
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return crc;
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}
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#endif
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int eth_init(void)
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{
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struct eth_device *old_current;
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if (!eth_current) {
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puts("No ethernet found.\n");
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return -ENODEV;
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}
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old_current = eth_current;
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do {
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debug("Trying %s\n", eth_current->name);
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if (eth_current->init(eth_current, gd->bd) >= 0) {
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eth_current->state = ETH_STATE_ACTIVE;
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return 0;
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}
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debug("FAIL\n");
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eth_try_another(0);
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} while (old_current != eth_current);
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return -ETIMEDOUT;
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}
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void eth_halt(void)
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{
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if (!eth_current)
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return;
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eth_current->halt(eth_current);
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eth_current->state = ETH_STATE_PASSIVE;
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}
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int eth_is_active(struct eth_device *dev)
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{
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return dev && dev->state == ETH_STATE_ACTIVE;
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}
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int eth_send(void *packet, int length)
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{
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if (!eth_current)
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return -ENODEV;
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return eth_current->send(eth_current, packet, length);
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}
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int eth_rx(void)
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{
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if (!eth_current)
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return -ENODEV;
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return eth_current->recv(eth_current);
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}
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#ifdef CONFIG_API
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static void eth_save_packet(void *packet, int length)
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{
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char *p = packet;
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int i;
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if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
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return;
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if (PKTSIZE < length)
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return;
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for (i = 0; i < length; i++)
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eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
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eth_rcv_bufs[eth_rcv_last].length = length;
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eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
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}
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int eth_receive(void *packet, int length)
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{
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char *p = packet;
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void *pp = push_packet;
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int i;
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if (eth_rcv_current == eth_rcv_last) {
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push_packet = eth_save_packet;
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eth_rx();
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push_packet = pp;
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if (eth_rcv_current == eth_rcv_last)
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return -1;
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}
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length = min(eth_rcv_bufs[eth_rcv_current].length, length);
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for (i = 0; i < length; i++)
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p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
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eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
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return length;
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}
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#endif /* CONFIG_API */
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