diff options
Diffstat (limited to 'net/eth_legacy.c')
| -rw-r--r-- | net/eth_legacy.c | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/net/eth_legacy.c b/net/eth_legacy.c new file mode 100644 index 0000000..bdcd6ea --- /dev/null +++ b/net/eth_legacy.c @@ -0,0 +1,439 @@ +/* + * (C) Copyright 2001-2015 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * Joe Hershberger, National Instruments + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <environment.h> +#include <net.h> +#include <phy.h> +#include <asm/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); + break; + case env_op_delete: + memset(dev->enetaddr, 0, 6); + } + } + 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[6]; + int ret = 0; + + eth_getenv_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, 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_ethaddr(dev->enetaddr)) { + eth_setenv_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 = 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(struct in_addr mcast_ip, int join) +{ + u8 mcast_mac[6]; + 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 */ |