1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/of_device.h>
17#include <linux/regmap.h>
18#include <linux/mfd/syscon.h>
19
20#include "cpsw.h"
21
22#define AM33XX_CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
23#define AM33XX_CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
24
25int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
26			     u8 *mac_addr)
27{
28	u32 macid_lo;
29	u32 macid_hi;
30	struct regmap *syscon;
31
32	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
33	if (IS_ERR(syscon)) {
34		if (PTR_ERR(syscon) == -ENODEV)
35			return 0;
36		return PTR_ERR(syscon);
37	}
38
39	regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(offset, slave),
40		    &macid_lo);
41	regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(offset, slave),
42		    &macid_hi);
43
44	mac_addr[5] = (macid_lo >> 8) & 0xff;
45	mac_addr[4] = macid_lo & 0xff;
46	mac_addr[3] = (macid_hi >> 24) & 0xff;
47	mac_addr[2] = (macid_hi >> 16) & 0xff;
48	mac_addr[1] = (macid_hi >> 8) & 0xff;
49	mac_addr[0] = macid_hi & 0xff;
50
51	return 0;
52}
53EXPORT_SYMBOL_GPL(cpsw_am33xx_cm_get_macid);
54
55MODULE_LICENSE("GPL");
56