4fd8d077cb
Add a bootdev driver for Ethernet. It can use the PXE boot mechanism to locate a file, added later. Signed-off-by: Simon Glass <sjg@chromium.org>
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
// 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,
|
|
};
|