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https://github.com/brain-hackers/u-boot-brain
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![Michael Walle](/assets/img/avatar_default.png)
device_probe() may fail in which case the seq_id will be -1. Don't display these devices during startup. While this is only a cosmetic change, the return value of eth_initialize() will also change to the actual number of available devices. The return value is only used in spl_net to decide whether there are any devices to boot from. So returning only available devices is also more correct in that case. Signed-off-by: Michael Walle <michael@walle.cc> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
589 lines
13 KiB
C
589 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2001-2015
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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* Joe Hershberger, National Instruments
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*/
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#include <common.h>
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#include <dm.h>
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#include <env.h>
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#include <net.h>
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#include <dm/device-internal.h>
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#include <dm/uclass-internal.h>
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#include <net/pcap.h>
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#include "eth_internal.h"
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* struct eth_device_priv - private structure for each Ethernet device
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*
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* @state: The state of the Ethernet MAC driver (defined by enum eth_state_t)
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*/
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struct eth_device_priv {
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enum eth_state_t state;
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};
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/**
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* struct eth_uclass_priv - The structure attached to the uclass itself
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*
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* @current: The Ethernet device that the network functions are using
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*/
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struct eth_uclass_priv {
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struct udevice *current;
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};
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/* eth_errno - This stores the most recent failure code from DM functions */
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static int eth_errno;
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static struct eth_uclass_priv *eth_get_uclass_priv(void)
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{
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struct uclass *uc;
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uclass_get(UCLASS_ETH, &uc);
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assert(uc);
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return uc->priv;
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}
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void eth_set_current_to_next(void)
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{
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struct eth_uclass_priv *uc_priv;
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uc_priv = eth_get_uclass_priv();
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if (uc_priv->current)
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uclass_next_device(&uc_priv->current);
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if (!uc_priv->current)
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uclass_first_device(UCLASS_ETH, &uc_priv->current);
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}
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/*
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* Typically this will simply return the active device.
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* In the case where the most recent active device was unset, this will attempt
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* to return the first device. If that device doesn't exist or fails to probe,
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* this function will return NULL.
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*/
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struct udevice *eth_get_dev(void)
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{
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struct eth_uclass_priv *uc_priv;
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uc_priv = eth_get_uclass_priv();
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if (!uc_priv->current)
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eth_errno = uclass_first_device(UCLASS_ETH,
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&uc_priv->current);
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return uc_priv->current;
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}
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/*
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* Typically this will just store a device pointer.
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* In case it was not probed, we will attempt to do so.
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* dev may be NULL to unset the active device.
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*/
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void eth_set_dev(struct udevice *dev)
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{
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if (dev && !device_active(dev)) {
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eth_errno = device_probe(dev);
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if (eth_errno)
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dev = NULL;
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}
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eth_get_uclass_priv()->current = dev;
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}
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/*
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* Find the udevice that either has the name passed in as devname or has an
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* alias named devname.
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*/
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struct udevice *eth_get_dev_by_name(const char *devname)
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{
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int seq = -1;
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char *endp = NULL;
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const char *startp = NULL;
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struct udevice *it;
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struct uclass *uc;
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int len = strlen("eth");
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/* Must be longer than 3 to be an alias */
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if (!strncmp(devname, "eth", len) && strlen(devname) > len) {
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startp = devname + len;
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seq = simple_strtoul(startp, &endp, 10);
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}
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uclass_get(UCLASS_ETH, &uc);
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uclass_foreach_dev(it, uc) {
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/*
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* We need the seq to be valid, so try to probe it.
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* If the probe fails, the seq will not match since it will be
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* -1 instead of what we are looking for.
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* We don't care about errors from probe here. Either they won't
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* match an alias or it will match a literal name and we'll pick
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* up the error when we try to probe again in eth_set_dev().
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*/
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if (device_probe(it))
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continue;
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/* Check for the name or the sequence number to match */
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if (strcmp(it->name, devname) == 0 ||
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(endp > startp && it->seq == seq))
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return it;
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}
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return NULL;
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}
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unsigned char *eth_get_ethaddr(void)
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{
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struct eth_pdata *pdata;
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if (eth_get_dev()) {
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pdata = eth_get_dev()->platdata;
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return pdata->enetaddr;
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}
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return NULL;
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}
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/* Set active state without calling start on the driver */
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int eth_init_state_only(void)
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{
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struct udevice *current;
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struct eth_device_priv *priv;
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current = eth_get_dev();
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if (!current || !device_active(current))
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return -EINVAL;
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priv = current->uclass_priv;
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priv->state = ETH_STATE_ACTIVE;
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return 0;
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}
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/* Set passive state without calling stop on the driver */
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void eth_halt_state_only(void)
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{
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struct udevice *current;
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struct eth_device_priv *priv;
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current = eth_get_dev();
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if (!current || !device_active(current))
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return;
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priv = current->uclass_priv;
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priv->state = ETH_STATE_PASSIVE;
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}
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int eth_get_dev_index(void)
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{
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if (eth_get_dev())
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return eth_get_dev()->seq;
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return -1;
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}
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static int eth_write_hwaddr(struct udevice *dev)
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{
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struct eth_pdata *pdata;
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int ret = 0;
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if (!dev || !device_active(dev))
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return -EINVAL;
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/* seq is valid since the device is active */
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if (eth_get_ops(dev)->write_hwaddr && !eth_mac_skip(dev->seq)) {
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pdata = dev->platdata;
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if (!is_valid_ethaddr(pdata->enetaddr)) {
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printf("\nError: %s address %pM illegal value\n",
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dev->name, pdata->enetaddr);
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return -EINVAL;
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}
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/*
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* Drivers are allowed to decide not to implement this at
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* run-time. E.g. Some devices may use it and some may not.
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*/
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ret = eth_get_ops(dev)->write_hwaddr(dev);
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if (ret == -ENOSYS)
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ret = 0;
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if (ret)
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printf("\nWarning: %s failed to set MAC address\n",
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dev->name);
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}
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return ret;
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}
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static int on_ethaddr(const char *name, const char *value, enum env_op op,
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int flags)
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{
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int index;
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int retval;
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struct udevice *dev;
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/* look for an index after "eth" */
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index = simple_strtoul(name + 3, NULL, 10);
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retval = uclass_find_device_by_seq(UCLASS_ETH, index, false, &dev);
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if (!retval) {
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struct eth_pdata *pdata = dev->platdata;
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switch (op) {
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case env_op_create:
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case env_op_overwrite:
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string_to_enetaddr(value, pdata->enetaddr);
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eth_write_hwaddr(dev);
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break;
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case env_op_delete:
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memset(pdata->enetaddr, 0, ARP_HLEN);
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}
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}
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return 0;
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}
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U_BOOT_ENV_CALLBACK(ethaddr, on_ethaddr);
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int eth_init(void)
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{
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char *ethact = env_get("ethact");
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char *ethrotate = env_get("ethrotate");
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struct udevice *current = NULL;
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struct udevice *old_current;
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int ret = -ENODEV;
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/*
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* When 'ethrotate' variable is set to 'no' and 'ethact' variable
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* is already set to an ethernet device, we should stick to 'ethact'.
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*/
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if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0)) {
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if (ethact) {
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current = eth_get_dev_by_name(ethact);
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if (!current)
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return -EINVAL;
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}
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}
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if (!current) {
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current = eth_get_dev();
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if (!current) {
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printf("No ethernet found.\n");
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return -ENODEV;
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}
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}
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old_current = current;
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do {
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if (current) {
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debug("Trying %s\n", current->name);
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if (device_active(current)) {
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ret = eth_get_ops(current)->start(current);
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if (ret >= 0) {
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struct eth_device_priv *priv =
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current->uclass_priv;
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priv->state = ETH_STATE_ACTIVE;
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return 0;
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}
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} else {
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ret = eth_errno;
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}
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debug("FAIL\n");
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} else {
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debug("PROBE FAIL\n");
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}
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/*
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* If ethrotate is enabled, this will change "current",
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* otherwise we will drop out of this while loop immediately
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*/
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eth_try_another(0);
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/* This will ensure the new "current" attempted to probe */
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current = eth_get_dev();
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} while (old_current != current);
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return ret;
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}
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void eth_halt(void)
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{
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struct udevice *current;
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struct eth_device_priv *priv;
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current = eth_get_dev();
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if (!current || !eth_is_active(current))
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return;
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eth_get_ops(current)->stop(current);
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priv = current->uclass_priv;
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if (priv)
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priv->state = ETH_STATE_PASSIVE;
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}
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int eth_is_active(struct udevice *dev)
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{
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struct eth_device_priv *priv;
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if (!dev || !device_active(dev))
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return 0;
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priv = dev_get_uclass_priv(dev);
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return priv->state == ETH_STATE_ACTIVE;
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}
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int eth_send(void *packet, int length)
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{
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struct udevice *current;
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int ret;
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current = eth_get_dev();
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if (!current)
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return -ENODEV;
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if (!eth_is_active(current))
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return -EINVAL;
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ret = eth_get_ops(current)->send(current, packet, length);
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if (ret < 0) {
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/* We cannot completely return the error at present */
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debug("%s: send() returned error %d\n", __func__, ret);
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}
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#if defined(CONFIG_CMD_PCAP)
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if (ret >= 0)
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pcap_post(packet, length, true);
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#endif
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return ret;
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}
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int eth_rx(void)
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{
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struct udevice *current;
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uchar *packet;
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int flags;
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int ret;
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int i;
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current = eth_get_dev();
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if (!current)
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return -ENODEV;
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if (!eth_is_active(current))
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return -EINVAL;
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/* Process up to 32 packets at one time */
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flags = ETH_RECV_CHECK_DEVICE;
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for (i = 0; i < 32; i++) {
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ret = eth_get_ops(current)->recv(current, flags, &packet);
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flags = 0;
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if (ret > 0)
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net_process_received_packet(packet, ret);
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if (ret >= 0 && eth_get_ops(current)->free_pkt)
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eth_get_ops(current)->free_pkt(current, packet, ret);
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if (ret <= 0)
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break;
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}
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if (ret == -EAGAIN)
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ret = 0;
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if (ret < 0) {
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/* We cannot completely return the error at present */
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debug("%s: recv() returned error %d\n", __func__, ret);
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}
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return ret;
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}
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int eth_initialize(void)
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{
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int num_devices = 0;
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struct udevice *dev;
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eth_common_init();
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/*
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* Devices need to write the hwaddr even if not started so that Linux
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* will have access to the hwaddr that u-boot stored for the device.
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* This is accomplished by attempting to probe each device and calling
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* their write_hwaddr() operation.
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*/
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uclass_first_device_check(UCLASS_ETH, &dev);
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if (!dev) {
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printf("No ethernet found.\n");
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bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
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} else {
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char *ethprime = env_get("ethprime");
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struct udevice *prime_dev = NULL;
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if (ethprime)
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prime_dev = eth_get_dev_by_name(ethprime);
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if (prime_dev) {
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eth_set_dev(prime_dev);
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eth_current_changed();
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} else {
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eth_set_dev(NULL);
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}
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bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
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do {
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if (dev->seq != -1) {
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if (num_devices)
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printf(", ");
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printf("eth%d: %s", dev->seq, dev->name);
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if (ethprime && dev == prime_dev)
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printf(" [PRIME]");
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}
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eth_write_hwaddr(dev);
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if (dev->seq != -1)
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num_devices++;
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uclass_next_device_check(&dev);
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} while (dev);
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if (!num_devices)
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printf("No ethernet found.\n");
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putc('\n');
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}
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return num_devices;
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}
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static int eth_post_bind(struct udevice *dev)
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{
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if (strchr(dev->name, ' ')) {
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printf("\nError: eth device name \"%s\" has a space!\n",
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dev->name);
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return -EINVAL;
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}
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return 0;
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}
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static int eth_pre_unbind(struct udevice *dev)
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{
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/* Don't hang onto a pointer that is going away */
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if (dev == eth_get_uclass_priv()->current)
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eth_set_dev(NULL);
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return 0;
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}
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static bool eth_dev_get_mac_address(struct udevice *dev, u8 mac[ARP_HLEN])
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{
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#if IS_ENABLED(CONFIG_OF_CONTROL)
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const uint8_t *p;
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p = dev_read_u8_array_ptr(dev, "mac-address", ARP_HLEN);
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if (!p)
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p = dev_read_u8_array_ptr(dev, "local-mac-address", ARP_HLEN);
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if (!p)
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return false;
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memcpy(mac, p, ARP_HLEN);
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return true;
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#else
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return false;
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#endif
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}
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static int eth_post_probe(struct udevice *dev)
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{
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struct eth_device_priv *priv = dev->uclass_priv;
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struct eth_pdata *pdata = dev->platdata;
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unsigned char env_enetaddr[ARP_HLEN];
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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struct eth_ops *ops = eth_get_ops(dev);
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static int reloc_done;
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if (!reloc_done) {
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if (ops->start)
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ops->start += gd->reloc_off;
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if (ops->send)
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ops->send += gd->reloc_off;
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if (ops->recv)
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ops->recv += gd->reloc_off;
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if (ops->free_pkt)
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ops->free_pkt += gd->reloc_off;
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if (ops->stop)
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ops->stop += gd->reloc_off;
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if (ops->mcast)
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ops->mcast += gd->reloc_off;
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if (ops->write_hwaddr)
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ops->write_hwaddr += gd->reloc_off;
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if (ops->read_rom_hwaddr)
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ops->read_rom_hwaddr += gd->reloc_off;
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reloc_done++;
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}
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#endif
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priv->state = ETH_STATE_INIT;
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/* Check if the device has a valid MAC address in device tree */
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if (!eth_dev_get_mac_address(dev, pdata->enetaddr) ||
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!is_valid_ethaddr(pdata->enetaddr)) {
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/* Check if the device has a MAC address in ROM */
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if (eth_get_ops(dev)->read_rom_hwaddr)
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eth_get_ops(dev)->read_rom_hwaddr(dev);
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}
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eth_env_get_enetaddr_by_index("eth", dev->seq, env_enetaddr);
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if (!is_zero_ethaddr(env_enetaddr)) {
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if (!is_zero_ethaddr(pdata->enetaddr) &&
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memcmp(pdata->enetaddr, env_enetaddr, ARP_HLEN)) {
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printf("\nWarning: %s MAC addresses don't match:\n",
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dev->name);
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printf("Address in ROM is %pM\n",
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pdata->enetaddr);
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printf("Address in environment is %pM\n",
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env_enetaddr);
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}
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/* Override the ROM MAC address */
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memcpy(pdata->enetaddr, env_enetaddr, ARP_HLEN);
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} else if (is_valid_ethaddr(pdata->enetaddr)) {
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eth_env_set_enetaddr_by_index("eth", dev->seq, pdata->enetaddr);
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printf("\nWarning: %s using MAC address from ROM\n",
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dev->name);
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|
} else if (is_zero_ethaddr(pdata->enetaddr) ||
|
|
!is_valid_ethaddr(pdata->enetaddr)) {
|
|
#ifdef CONFIG_NET_RANDOM_ETHADDR
|
|
net_random_ethaddr(pdata->enetaddr);
|
|
printf("\nWarning: %s (eth%d) using random MAC address - %pM\n",
|
|
dev->name, dev->seq, pdata->enetaddr);
|
|
#else
|
|
printf("\nError: %s address not set.\n",
|
|
dev->name);
|
|
return -EINVAL;
|
|
#endif
|
|
}
|
|
|
|
eth_write_hwaddr(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int eth_pre_remove(struct udevice *dev)
|
|
{
|
|
struct eth_pdata *pdata = dev->platdata;
|
|
|
|
eth_get_ops(dev)->stop(dev);
|
|
|
|
/* clear the MAC address */
|
|
memset(pdata->enetaddr, 0, ARP_HLEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
UCLASS_DRIVER(eth) = {
|
|
.name = "eth",
|
|
.id = UCLASS_ETH,
|
|
.post_bind = eth_post_bind,
|
|
.pre_unbind = eth_pre_unbind,
|
|
.post_probe = eth_post_probe,
|
|
.pre_remove = eth_pre_remove,
|
|
.priv_auto_alloc_size = sizeof(struct eth_uclass_priv),
|
|
.per_device_auto_alloc_size = sizeof(struct eth_device_priv),
|
|
.flags = DM_UC_FLAG_SEQ_ALIAS,
|
|
};
|