diff options
Diffstat (limited to 'qemu/roms/u-boot/net/eth.c')
| -rw-r--r-- | qemu/roms/u-boot/net/eth.c | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/net/eth.c b/qemu/roms/u-boot/net/eth.c new file mode 100644 index 000000000..99386e3e6 --- /dev/null +++ b/qemu/roms/u-boot/net/eth.c @@ -0,0 +1,531 @@ +/* + * (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> + +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_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) || 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"); + + 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"; +} |