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