/*
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* Copyright (C) 2015 ROCKCHIP, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/memblock.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#define ETH_MAC_OFFSET 36
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static u8 eth_mac[6];
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void rk_devinfo_get_eth_mac(u8 *mac)
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{
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memcpy(mac, eth_mac, 6);
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pr_info("%s: %02x.%02x.%02x.%02x.%02x.%02x\n", __func__,
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eth_mac[0], eth_mac[1], eth_mac[2],
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eth_mac[3], eth_mac[4], eth_mac[5]);
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}
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EXPORT_SYMBOL_GPL(rk_devinfo_get_eth_mac);
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static int __init rk_devinfo_init(void)
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{
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int ret;
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u8 *vaddr;
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struct device_node *node;
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struct resource res;
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phys_addr_t start, size;
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void *begin, *end;
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node = of_find_node_by_name(NULL, "stb-devinfo");
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if (!node) {
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pr_err("%s.%d: fail to get node\n", __func__, __LINE__);
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goto out;
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}
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ret = of_address_to_resource(node, 0, &res);
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if (ret) {
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pr_err("%s.%d: fail to get resource\n", __func__, __LINE__);
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of_node_put(node);
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goto out;
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}
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of_node_put(node);
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start = res.start;
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size = resource_size(&res);
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if (!size) {
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pr_err("%s.%d: size = 0\n", __func__, __LINE__);
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goto out;
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}
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vaddr = phys_to_virt(start);
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/* copy eth mac addr */
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memcpy(eth_mac, vaddr + ETH_MAC_OFFSET, 6);
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begin = phys_to_virt(start);
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end = phys_to_virt(start + size);
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memblock_free(start, size);
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free_reserved_area(begin, end, -1, "stb_devinfo");
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out:
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return 0;
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}
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module_init(rk_devinfo_init);
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