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// SPDX-License-Identifier: GPL-2.0+
/*
* Bootdevice for ethernet (uses PXE)
*
* Copyright 2021 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <bootdev.h>
#include <bootflow.h>
#include <command.h>
#include <bootmeth.h>
#include <distro.h>
#include <dm.h>
#include <log.h>
#include <net.h>
static int eth_get_bootflow(struct udevice *dev, struct bootflow_iter *iter,
struct bootflow *bflow)
{
char name[60];
int ret;
/* Must be an Ethernet device */
ret = bootflow_iter_uses_network(iter);
if (ret)
return log_msg_ret("net", ret);
ret = bootmeth_check(bflow->method, iter);
if (ret)
return log_msg_ret("check", ret);
/*
* Like distro boot, this assumes there is only one Ethernet device.
* In this case, that means that @eth is ignored
*/
snprintf(name, sizeof(name), "%s.%d", dev->name, iter->part);
bflow->name = strdup(name);
if (!bflow->name)
return log_msg_ret("name", -ENOMEM);
/*
* There is not a direct interface to the network stack so run
* everything through the command-line interpreter for now.
*
* Don't bother checking the result of dhcp. It can fail with:
*
* DHCP client bound to address 192.168.4.50 (4 ms)
* *** Warning: no boot file name; using 'C0A80432.img'
* Using smsc95xx_eth device
* TFTP from server 192.168.4.1; our IP address is 192.168.4.50
* Filename 'C0A80432.img'.
* Load address: 0x200000
* Loading: *
* TFTP error: 'File not found' (1)
*
* This is not a real failure, since we don't actually care if the
* boot file exists.
*/
log_debug("running dhcp\n");
run_command("dhcp", 0);
bflow->state = BOOTFLOWST_MEDIA;
/* See distro_pxe_read_bootflow() for the standard impl of this */
log_debug("dhcp complete - reading bootflow with method %s\n",
bflow->method->name);
ret = bootmeth_read_bootflow(bflow->method, bflow);
log_debug("reading bootflow returned %d\n", ret);
if (ret)
return log_msg_ret("method", ret);
return 0;
}
static int eth_bootdev_bind(struct udevice *dev)
{
struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev);
ucp->prio = BOOTDEVP_4_NET_BASE;
return 0;
}
struct bootdev_ops eth_bootdev_ops = {
.get_bootflow = eth_get_bootflow,
};
static const struct udevice_id eth_bootdev_ids[] = {
{ .compatible = "u-boot,bootdev-eth" },
{ }
};
U_BOOT_DRIVER(eth_bootdev) = {
.name = "eth_bootdev",
.id = UCLASS_BOOTDEV,
.ops = ð_bootdev_ops,
.bind = eth_bootdev_bind,
.of_match = eth_bootdev_ids,
};
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