Add what it takes to enable NETDEVICES with NET_LWIP and enable DHCP as well as the dhcp command. - net-lwip/net-lwip.c is mostly empty for now. It will provide functions similar to net/net.c except based on the lwIP stack - include/net-lwip.h is a replacement for include/net.h which is unused when NET_LWIP is enabled. Declarations from the latter will be transferred to the former as needed when new network commands are ported on top of lwIP. - CMD_TFTPBOOT is selected by BOOTMETH_EFI due to this code having an implicit dependency on do_tftpb().
Signed-off-by: Jerome Forissier jerome.forissier@linaro.org --- Makefile | 1 + boot/Kconfig | 3 +- cmd/Kconfig | 26 +++++ cmd/Makefile | 4 + cmd/net-lwip.c | 13 +++ common/board_r.c | 4 +- drivers/net/Kconfig | 2 +- include/net-lwip.h | 85 +++++++++++++++ include/net.h | 2 +- net-lwip/Kconfig | 41 +++++++- net-lwip/Makefile | 15 +++ net-lwip/dhcp.c | 105 +++++++++++++++++++ net-lwip/eth_internal.h | 35 +++++++ net-lwip/net-lwip.c | 224 ++++++++++++++++++++++++++++++++++++++++ net-lwip/tftp.c | 11 ++ 15 files changed, 564 insertions(+), 7 deletions(-) create mode 100644 cmd/net-lwip.c create mode 100644 include/net-lwip.h create mode 100644 net-lwip/Makefile create mode 100644 net-lwip/dhcp.c create mode 100644 net-lwip/eth_internal.h create mode 100644 net-lwip/net-lwip.c create mode 100644 net-lwip/tftp.c
diff --git a/Makefile b/Makefile index 3df9c45a17c..d59b914071f 100644 --- a/Makefile +++ b/Makefile @@ -860,6 +860,7 @@ libs-y += env/ libs-y += lib/ libs-y += fs/ libs-$(CONFIG_NET) += net/ +libs-$(CONFIG_NET_LWIP) += net-lwip/ libs-y += disk/ libs-y += drivers/ libs-$(CONFIG_SYS_FSL_DDR) += drivers/ddr/fsl/ diff --git a/boot/Kconfig b/boot/Kconfig index 6f3096c15a6..004e69dd92a 100644 --- a/boot/Kconfig +++ b/boot/Kconfig @@ -378,7 +378,7 @@ config BOOT_DEFAULTS_CMDS select CMD_FAT select CMD_FS_GENERIC select CMD_PART if PARTITIONS - select CMD_DHCP if CMD_NET + select CMD_DHCP if CMD_NET || CMD_NET_LWIP select CMD_PING if CMD_NET select CMD_PXE if CMD_NET select CMD_BOOTI if ARM64 @@ -540,6 +540,7 @@ config BOOTMETH_EXTLINUX_PXE config BOOTMETH_EFILOADER bool "Bootdev support for EFI boot" depends on EFI_BINARY_EXEC + select CMD_TFTPBOOT if CMD_NET_LWIP default y help Enables support for EFI boot using bootdevs. This makes the diff --git a/cmd/Kconfig b/cmd/Kconfig index b026439c773..1bfa528e945 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -2084,6 +2084,32 @@ config CMD_WOL
endif
+if NET_LWIP + +menuconfig CMD_NET_LWIP + bool "Network commands (lwIP)" + default y + +if CMD_NET_LWIP + +config CMD_DHCP + bool "dhcp" + select PROT_DHCP_LWIP + help + Boot image via network using DHCP/TFTP protocol + +config CMD_TFTPBOOT + bool "tftp" + select PROT_UDP_LWIP + default n + help + tftpboot - load file via network using TFTP protocol + Currently a placeholder (not implemented) + +endif + +endif + menu "Misc commands"
config CMD_2048 diff --git a/cmd/Makefile b/cmd/Makefile index 87133cc27a8..535b6838ca5 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -128,6 +128,10 @@ endif obj-$(CONFIG_CMD_MUX) += mux.o obj-$(CONFIG_CMD_NAND) += nand.o obj-$(CONFIG_CMD_NET) += net.o +obj-$(CONFIG_CMD_NET_LWIP) += net-lwip.o +ifdef CONFIG_CMD_NET_LWIP +CFLAGS_net-lwip.o := -I$(srctree)/lib/lwip/lwip/src/include -I$(srctree)/lib/lwip/u-boot +endif obj-$(CONFIG_ENV_SUPPORT) += nvedit.o obj-$(CONFIG_CMD_NVEDIT_EFI) += nvedit_efi.o obj-$(CONFIG_CMD_ONENAND) += onenand.o diff --git a/cmd/net-lwip.c b/cmd/net-lwip.c new file mode 100644 index 00000000000..966d7226eda --- /dev/null +++ b/cmd/net-lwip.c @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (C) 2024 Linaro Ltd. */ + +#include <command.h> +#include <net-lwip.h> + +#if defined(CONFIG_CMD_DHCP) +U_BOOT_CMD( + dhcp, 3, 1, do_dhcp, + "boot image via network using DHCP/TFTP protocol", + "[loadAddress] [[hostIPaddr:]bootfilename]" +); +#endif diff --git a/common/board_r.c b/common/board_r.c index da0b80f24ff..6548eb8fdd5 100644 --- a/common/board_r.c +++ b/common/board_r.c @@ -472,7 +472,7 @@ static int initr_status_led(void) } #endif
-#ifdef CONFIG_CMD_NET +#if defined(CONFIG_CMD_NET) || defined(CONFIG_CMD_NET_LWIP) static int initr_net(void) { puts("Net: "); @@ -727,7 +727,7 @@ static init_fnc_t init_sequence_r[] = { #ifdef CONFIG_PCI_ENDPOINT pci_ep_init, #endif -#ifdef CONFIG_CMD_NET +#if defined(CONFIG_CMD_NET) || defined(CONFIG_CMD_NET_LWIP) INIT_FUNC_WATCHDOG_RESET initr_net, #endif diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index b2d7b499766..4ba09c9d6f8 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -96,7 +96,7 @@ config DSA_SANDBOX
menuconfig NETDEVICES bool "Network device support" - depends on NET + depends on NET || NET_LWIP select DM_ETH help You must select Y to enable any network device support diff --git a/include/net-lwip.h b/include/net-lwip.h new file mode 100644 index 00000000000..2308703e46b --- /dev/null +++ b/include/net-lwip.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +#ifndef __NET_LWIP_H__ +#define __NET_LWIP_H__ + +#include <asm/cache.h> +#include <linux/types.h> +#include <lwip/netif.h> +#include <time.h> + +/* + * The number of receive packet buffers, and the required packet buffer + * alignment in memory. + * + */ +#define PKTBUFSRX CONFIG_SYS_RX_ETH_BUFFER +#define PKTALIGN ARCH_DMA_MINALIGN + +/* ARP hardware address length */ +#define ARP_HLEN 6 + +/* + * Maximum packet size; used to allocate packet storage. Use + * the maxium Ethernet frame size as specified by the Ethernet + * standard including the 802.1Q tag (VLAN tagging). + * maximum packet size = 1522 + * maximum packet size and multiple of 32 bytes = 1536 + */ +#define PKTSIZE 1522 +#ifndef CONFIG_DM_DSA +#define PKTSIZE_ALIGN 1536 +#else +/* Maximum DSA tagging overhead (headroom and/or tailroom) */ +#define DSA_MAX_OVR 256 +#define PKTSIZE_ALIGN (1536 + DSA_MAX_OVR) +#endif + +struct udevice *eth_get_dev(void); /* get the current device */ +/* + * Get the hardware address for an ethernet interface . + * Args: + * base_name - base name for device (normally "eth") + * index - device index number (0 for first) + * enetaddr - returns 6 byte hardware address + * Returns: + * Return true if the address is valid. + */ +int eth_env_get_enetaddr_by_index(const char *base_name, int index, + uchar *enetaddr); +int eth_init(void); /* Initialize the device */ +int eth_send(void *packet, int length); /* Send a packet */ +int eth_rx(void); +int eth_get_dev_index(void); +int eth_init_state_only(void); /* Set active state */ +void eth_set_current(void); /* set nterface to ethcur var */ + +struct ethernet_hdr { + u8 et_dest[ARP_HLEN]; /* Destination node */ + u8 et_src[ARP_HLEN]; /* Source node */ + u16 et_protlen; /* Protocol or length */ +} __attribute__((packed)); + +/* Ethernet header size */ +#define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) + +/** + * string_to_enetaddr() - Parse a MAC address + * + * Convert a string MAC address + * + * Implemented in lib/net_utils.c (built unconditionally) + * + * @addr: MAC address in aa:bb:cc:dd:ee:ff format, where each part is a 2-digit + * hex value + * @enetaddr: Place to put MAC address (6 bytes) + */ +void string_to_enetaddr(const char *addr, uint8_t *enetaddr); + +int net_lwip_init(void); +struct netif *net_lwip_get_netif(void); + +int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); +int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); + +#endif /* __NET_LWIP_H__ */ diff --git a/include/net.h b/include/net.h index ac511eab103..330bc6bf66c 100644 --- a/include/net.h +++ b/include/net.h @@ -914,7 +914,7 @@ static inline struct in_addr env_get_ip(char *var) */ void reset_phy(void);
-#if CONFIG_IS_ENABLED(NET) +#if CONFIG_IS_ENABLED(NET) || CONFIG_IS_ENABLED(NET_LWIP) /** * eth_set_enable_bootdevs() - Enable or disable binding of Ethernet bootdevs * diff --git a/net-lwip/Kconfig b/net-lwip/Kconfig index 7d9ec8fdfbd..9e611f805ad 100644 --- a/net-lwip/Kconfig +++ b/net-lwip/Kconfig @@ -4,6 +4,7 @@
menuconfig NET_LWIP bool "Networking support (lwIP stack) -- EXPERIMENTAL" + imply NETDEVICES help Include networking support based on the lwIP (lightweight IP) TCP/IP stack (https://nongnu.org/lwip). This is a replacement for @@ -12,5 +13,41 @@ menuconfig NET_LWIP depend on CONFIG_NET (such as cmd/net.c enabled via CONFIG_CMD_NET). Therefore the two symbols CONFIG_NET and CONFIG_NET_LWIP are mutually exclusive. - NOTE: This currently only builds the lwIP library but does not add - any functionality to U-Boot. + +if NET_LWIP + +config LWIP_DEBUG + bool "Enable debug traces in the lwIP library" + +config LWIP_ASSERT + bool "Enable assertions in the lwIP library" + +config PROT_DHCP_LWIP + bool "DHCP support in lwIP" + depends on PROT_UDP_LWIP + help + Enable support for the DHCP protocol in lwIP. + +config PROT_DNS_LWIP + bool + depends on PROT_UDP_LWIP + +config PROT_RAW_LWIP + bool + +config PROT_TCP_LWIP + bool + +config PROT_UDP_LWIP + bool + +config BOOTDEV_ETH + bool "Enable bootdev for ethernet" + depends on BOOTSTD + default y + help + Provide a bootdev for ethernet so that is it possible to boot + an operating system over the network, using the PXE (Preboot + Execution Environment) protocol. + +endif diff --git a/net-lwip/Makefile b/net-lwip/Makefile new file mode 100644 index 00000000000..a56c32bfa74 --- /dev/null +++ b/net-lwip/Makefile @@ -0,0 +1,15 @@ +ccflags-y += -I$(srctree)/lib/lwip/lwip/src/include -I$(srctree)/lib/lwip/u-boot + +obj-$(CONFIG_$(SPL_TPL_)BOOTDEV_ETH) += ../net/eth_bootdev.o +obj-$(CONFIG_DM_MDIO) += ../net/mdio-uclass.o +obj-$(CONFIG_DM_MDIO_MUX) += ../net/mdio-mux-uclass.o +obj-$(CONFIG_$(SPL_)DM_ETH) += ../net/eth_common.o +obj-$(CONFIG_$(SPL_)DM_ETH) += ../net/eth-uclass.o +obj-$(CONFIG_$(SPL_)DM_ETH) += net-lwip.o +obj-$(CONFIG_CMD_DHCP) += dhcp.o +obj-$(CONFIG_CMD_TFTPBOOT) += tftp.o + +# Disable this warning as it is triggered by: +# sprintf(buf, index ? "foo%d" : "foo", index) +# and this is intentional usage. +CFLAGS_eth_common.o += -Wno-format-extra-args diff --git a/net-lwip/dhcp.c b/net-lwip/dhcp.c new file mode 100644 index 00000000000..d1d35999b04 --- /dev/null +++ b/net-lwip/dhcp.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (C) 2024 Linaro Ltd. */ + +#include <command.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <lwip/dhcp.h> +#include <lwip/dns.h> +#include <lwip/timeouts.h> +#include <net-lwip.h> +#include <time.h> + +#define DHCP_TIMEOUT_MS 2000 + +#ifdef CONFIG_CMD_TFTPBOOT +/* Boot file obtained from DHCP (if present) */ +static char boot_file_name[DHCP_BOOT_FILE_LEN]; +#endif + +static void call_lwip_dhcp_fine_tmr(void *ctx) +{ + dhcp_fine_tmr(); +} + +int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) +{ + unsigned long start; + struct netif *netif; + struct dhcp *dhcp; + bool bound; + + /* Running DHCP on the primary interface only */ + if (eth_get_dev_index() != 0) + return -EINVAL; + + net_lwip_init(); + + netif = net_lwip_get_netif(); + if (!netif) + return CMD_RET_FAILURE; + + /* + * The fine timer is half a second, it deals with the initial DHCP + * request. + * We don't bother with the coarse timer (1 minute) which handles the + * DHCP lease renewal. + */ + sys_timeout(500, call_lwip_dhcp_fine_tmr, NULL); + start = get_timer(0); + dhcp_start(netif); + + /* Wait for DHCP to complete */ + do { + eth_rx(); + sys_check_timeouts(); + bound = dhcp_supplied_address(netif); + if (bound) + break; + } while (get_timer(start) < DHCP_TIMEOUT_MS); + + sys_untimeout(call_lwip_dhcp_fine_tmr, NULL); + + if (!bound) + return CMD_RET_FAILURE; + + dhcp = netif_dhcp_data(netif); + + env_set("bootfile", dhcp->boot_file_name); + if (dhcp->offered_gw_addr.addr != 0) { + + env_set("gatewayip", ip4addr_ntoa(&dhcp->offered_gw_addr)); + /* Set this interface as the default for IP routing */ + netif_set_default(netif); + } + env_set("ipaddr", ip4addr_ntoa(&dhcp->offered_ip_addr)); + env_set("netmask", ip4addr_ntoa(&dhcp->offered_sn_mask)); + env_set("serverip", ip4addr_ntoa(&dhcp->server_ip_addr)); +#ifdef CONFIG_PROT_DNS_LWIP + env_set("dnsip", ip4addr_ntoa(dns_getserver(0))); + env_set("dnsip2", ip4addr_ntoa(dns_getserver(1))); +#endif +#ifdef CONFIG_CMD_TFTPBOOT + if (dhcp->boot_file_name[0] != '\0') + strncpy(boot_file_name, dhcp->boot_file_name, + sizeof(boot_file_name)); +#endif + + printf("DHCP client bound to address %pI4 (%lu ms)\n", + &dhcp->offered_ip_addr, get_timer(start)); + + return CMD_RET_SUCCESS; +} + +int dhcp_run(ulong addr, const char *fname, bool autoload) +{ + char *dhcp_argv[] = {"dhcp", NULL, }; + struct cmd_tbl cmdtp = {}; /* dummy */ + + if (autoload) { + /* Will be supported when TFTP is added */ + return -EOPNOTSUPP; + } + + return do_dhcp(&cmdtp, 0, 1, dhcp_argv); +} diff --git a/net-lwip/eth_internal.h b/net-lwip/eth_internal.h new file mode 100644 index 00000000000..0b829a8d388 --- /dev/null +++ b/net-lwip/eth_internal.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2001-2015 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * Joe Hershberger, National Instruments + */ + +#ifndef __ETH_INTERNAL_H +#define __ETH_INTERNAL_H + +/* Do init that is common to driver model and legacy networking */ +void eth_common_init(void); + +/** + * eth_env_set_enetaddr_by_index() - set the MAC address environment variable + * + * This sets up an environment variable with the given MAC address (@enetaddr). + * The environment variable to be set is defined by <@base_name><@index>addr. + * If @index is 0 it is omitted. For common Ethernet this means ethaddr, + * eth1addr, etc. + * + * @base_name: Base name for variable, typically "eth" + * @index: Index of interface being updated (>=0) + * @enetaddr: Pointer to MAC address to put into the variable + * Return: 0 if OK, other value on error + */ +int eth_env_set_enetaddr_by_index(const char *base_name, int index, + uchar *enetaddr); + +int eth_mac_skip(int index); +void eth_current_changed(void); +void eth_set_dev(struct udevice *dev); +void eth_set_current_to_next(void); + +#endif diff --git a/net-lwip/net-lwip.c b/net-lwip/net-lwip.c new file mode 100644 index 00000000000..886028b68c3 --- /dev/null +++ b/net-lwip/net-lwip.c @@ -0,0 +1,224 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Copyright (C) 2024 Linaro Ltd. */ + +#include <command.h> +#include <dm/device.h> +#include <dm/uclass.h> +#include <lwip/ip4_addr.h> +#include <lwip/err.h> +#include <lwip/netif.h> +#include <lwip/pbuf.h> +#include <lwip/etharp.h> +#include <lwip/prot/etharp.h> +#include <net-lwip.h> + +/* xx:xx:xx:xx:xx:xx\0 */ +#define MAC_ADDR_STRLEN 18 + +#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER) +void (*push_packet)(void *, int len) = 0; +#endif +int net_restart_wrap; +static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; +uchar *net_rx_packets[PKTBUFSRX]; +uchar *net_rx_packet; +uchar *net_tx_packet; + +static err_t low_level_output(struct netif *netif, struct pbuf *p) +{ + int err; + + /* switch dev to active state */ + eth_init_state_only(); + + err = eth_send(p->payload, p->len); + if (err) { + log_err("eth_send error %d\n", err); + return ERR_ABRT; + } + return ERR_OK; +} + +static err_t net_lwip_if_init(struct netif *netif) +{ +#if LWIP_IPV4 + netif->output = etharp_output; +#endif + netif->linkoutput = low_level_output; + netif->mtu = 1500; + netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP; + + return ERR_OK; +} + +static void eth_init_rings(void) +{ + static bool called; + int i; + + if (called) + return; + called = true; + + net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1); + net_tx_packet -= (ulong)net_tx_packet % PKTALIGN; + for (i = 0; i < PKTBUFSRX; i++) + net_rx_packets[i] = net_tx_packet + (i + 1) * PKTSIZE_ALIGN; +} + +int net_lwip_init(void) +{ + ip4_addr_t ipaddr, netmask, gw; + struct netif *unetif; + struct udevice *udev; + int ret; + unsigned char env_enetaddr[ARP_HLEN]; + const struct udevice *dev; + struct uclass *uc; + + eth_set_current(); + + udev = eth_get_dev(); + if (!udev) { + log_err("no active eth device\n"); + return ERR_IF; + } + + eth_init_rings(); + + ret = eth_init(); + if (ret) { + log_err("eth_init error %d\n", ret); + return ERR_IF; + } + + uclass_id_foreach_dev(UCLASS_ETH, dev, uc) { + char ipstr[IP4ADDR_STRLEN_MAX]; + char maskstr[IP4ADDR_STRLEN_MAX]; + char gwstr[IP4ADDR_STRLEN_MAX]; + char hwstr[MAC_ADDR_STRLEN]; + char *env; + + eth_env_get_enetaddr_by_index("eth", dev_seq(dev), env_enetaddr); + log_info("eth%d: %s %pM %s\n", dev_seq(dev), dev->name, env_enetaddr, + udev == dev ? "active" : ""); + + unetif = malloc(sizeof(struct netif)); + if (!unetif) + return ERR_MEM; + memset(unetif, 0, sizeof(struct netif)); + + ip4_addr_set_zero(&gw); + ip4_addr_set_zero(&ipaddr); + ip4_addr_set_zero(&netmask); + + if (dev_seq(dev) == 0) { + snprintf(ipstr, IP4ADDR_STRLEN_MAX, "ipaddr"); + snprintf(maskstr, IP4ADDR_STRLEN_MAX, "netmask"); + snprintf(gwstr, IP4ADDR_STRLEN_MAX, "gw"); + } else { + snprintf(ipstr, IP4ADDR_STRLEN_MAX, "ipaddr%d", dev_seq(dev)); + snprintf(maskstr, IP4ADDR_STRLEN_MAX, "netmask%d", dev_seq(dev)); + snprintf(gwstr, IP4ADDR_STRLEN_MAX, "gw%d", dev_seq(dev)); + } + snprintf(hwstr, MAC_ADDR_STRLEN, "%pM", env_enetaddr); + snprintf(unetif->name, 2, "%d", dev_seq(dev)); + + string_to_enetaddr(hwstr, unetif->hwaddr); + unetif->hwaddr_len = ETHARP_HWADDR_LEN; + + env = env_get(ipstr); + if (env) + ipaddr_aton(env, &ipaddr); + + env = env_get(maskstr); + if (env) + ipaddr_aton(env, &netmask); + + if (!netif_add(unetif, &ipaddr, &netmask, &gw, + unetif, net_lwip_if_init, netif_input)) { + log_err("err: netif_add failed!\n"); + free(unetif); + return ERR_IF; + } + + netif_set_up(unetif); + netif_set_link_up(unetif); + } + + return CMD_RET_SUCCESS; +} + +/* + * Return the current network interface for lwIP. In other words, the struct + * netif that corresponds to eth_get_dev(). + */ +struct netif *net_lwip_get_netif(void) +{ + int idx; + + idx = eth_get_dev_index(); + if (idx < 0) + return NULL; + + return netif_get_by_index(idx + 1); +} + +int net_init(void) +{ + return net_lwip_init(); +} + +static struct pbuf *alloc_pbuf_and_copy(uchar *data, int len) +{ + struct pbuf *p, *q; + + /* We allocate a pbuf chain of pbufs from the pool. */ + p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL); + if (!p) { + LINK_STATS_INC(link.memerr); + LINK_STATS_INC(link.drop); + return NULL; + } + + for (q = p; q != NULL; q = q->next) { + memcpy(q->payload, data, q->len); + data += q->len; + } + + LINK_STATS_INC(link.recv); + + return p; +} + +void net_process_received_packet(uchar *in_packet, int len) +{ + struct netif *netif; + struct pbuf *pbuf; + + if (len < ETHER_HDR_SIZE) + return; + +#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER) + if (push_packet) { + (*push_packet)(in_packet, len); + return; + } +#endif + + netif = net_lwip_get_netif(); + if (!netif) + return; + + pbuf = alloc_pbuf_and_copy(in_packet, len); + if (!pbuf) + return; + + netif->input(pbuf, netif); +} + +u32_t sys_now(void) +{ + return get_timer(0); +} diff --git a/net-lwip/tftp.c b/net-lwip/tftp.c new file mode 100644 index 00000000000..1fa246f55d9 --- /dev/null +++ b/net-lwip/tftp.c @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (C) 2024 Linaro Ltd. */ + +#include <command.h> +#include <net-lwip.h> + +int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) +{ + /* Not implemented */ + return CMD_RET_FAILURE; +}