/* * (C) Copyright 2001-2010 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * 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 */ #include <common.h> #include <command.h> #include <net.h> #include <miiphy.h> #include <phy.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); } #ifdef CONFIG_RANDOM_MACADDR void eth_random_enetaddr(uchar *enetaddr) { uint32_t rval; srand(get_timer(0)); rval = rand(); enetaddr[0] = rval & 0xff; enetaddr[1] = (rval >> 8) & 0xff; enetaddr[2] = (rval >> 16) & 0xff; rval = rand(); enetaddr[3] = rval & 0xff; enetaddr[4] = (rval >> 8) & 0xff; enetaddr[5] = (rval >> 16) & 0xff; /* make sure it's local and unicast */ enetaddr[0] = (enetaddr[0] | 0x02) & ~0x01; } #endif /* * 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_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 (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) { if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) && 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); } if (dev->write_hwaddr && !eth_mac_skip(eth_number)) { if (!is_valid_ether_addr(dev->enetaddr)) return -1; ret = dev->write_hwaddr(dev); } 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) 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"); if (eth_write_hwaddr(dev, "eth", dev->index)) puts("\nWarning: failed to set MAC address\n"); 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"; }