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// SPDX-License-Identifier: GPL-2.
/*
* Copyright (c) 2018 Oleksij Rempel <linux@rempel-privat.de>
*/
#include <common.h>
#include <fcntl.h>
#include <init.h>
#include <libfile.h>
#include <net.h>
#include <unistd.h>
#define AR93000_EPPROM_OFFSET 0x1000
struct ar9300_eeprom {
u8 eeprom_version;
u8 template_version;
u8 mac_addr[6];
};
static int art_set_mac(struct device_d *dev, struct ar9300_eeprom *eeprom)
{
struct device_node *node = dev->device_node;
struct device_node *rnode;
if (!node)
return -ENOENT;
rnode = of_parse_phandle_from(node, NULL,
"barebox,provide-mac-address", 0);
if (!rnode)
return -ENOENT;
of_eth_register_ethaddr(rnode, &eeprom->mac_addr[0]);
return 0;
}
static int art_read_mac(struct device_d *dev, const char *file)
{
int fd, rbytes;
struct ar9300_eeprom eeprom;
fd = open_and_lseek(file, O_RDONLY, AR93000_EPPROM_OFFSET);
if (fd < 0) {
dev_err(dev, "Failed to open eeprom path %s %d\n",
file, fd);
return fd;
}
rbytes = read_full(fd, &eeprom, sizeof(eeprom));
close(fd);
if (rbytes < sizeof(eeprom)) {
dev_err(dev, "Failed to read %s\n", file);
return rbytes < 0 ? rbytes : -EIO;
}
dev_dbg(dev, "ART version: %x.%x\n",
eeprom.eeprom_version, eeprom.template_version);
dev_dbg(dev, "mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
eeprom.mac_addr[0],
eeprom.mac_addr[1],
eeprom.mac_addr[2],
eeprom.mac_addr[3],
eeprom.mac_addr[4],
eeprom.mac_addr[5]);
if (!is_valid_ether_addr(&eeprom.mac_addr[0])) {
dev_err(dev, "bad MAC addr\n");
return -EILSEQ;
}
return art_set_mac(dev, &eeprom);
}
static int art_probe(struct device_d *dev)
{
char *path;
int ret;
dev_dbg(dev, "found ART partition\n");
ret = of_find_path(dev->device_node, "device-path", &path, 0);
if (ret) {
dev_err(dev, "can't find path\n");
return ret;
}
return art_read_mac(dev, path);
}
static struct of_device_id art_dt_ids[] = {
{
.compatible = "qca,art",
}, {
/* sentinel */
}
};
static struct driver_d art_driver = {
.name = "qca-art",
.probe = art_probe,
.of_compatible = art_dt_ids,
};
static int art_of_driver_init(void)
{
platform_driver_register(&art_driver);
return 0;
}
late_initcall(art_of_driver_init);
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