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 CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
23#define CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
24
25static int davinci_emac_3517_get_macid(struct device *dev, u16 offset,
26				       int slave, u8 *mac_addr)
27{
28	u32 macid_lsb;
29	u32 macid_msb;
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, CTRL_MAC_LO_REG(offset, slave), &macid_lsb);
40	regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_msb);
41
42	mac_addr[0] = (macid_msb >> 16) & 0xff;
43	mac_addr[1] = (macid_msb >> 8)  & 0xff;
44	mac_addr[2] = macid_msb & 0xff;
45	mac_addr[3] = (macid_lsb >> 16) & 0xff;
46	mac_addr[4] = (macid_lsb >> 8)  & 0xff;
47	mac_addr[5] = macid_lsb & 0xff;
48
49	return 0;
50}
51
52static int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
53				    u8 *mac_addr)
54{
55	u32 macid_lo;
56	u32 macid_hi;
57	struct regmap *syscon;
58
59	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
60	if (IS_ERR(syscon)) {
61		if (PTR_ERR(syscon) == -ENODEV)
62			return 0;
63		return PTR_ERR(syscon);
64	}
65
66	regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lo);
67	regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_hi);
68
69	mac_addr[5] = (macid_lo >> 8) & 0xff;
70	mac_addr[4] = macid_lo & 0xff;
71	mac_addr[3] = (macid_hi >> 24) & 0xff;
72	mac_addr[2] = (macid_hi >> 16) & 0xff;
73	mac_addr[1] = (macid_hi >> 8) & 0xff;
74	mac_addr[0] = macid_hi & 0xff;
75
76	return 0;
77}
78
79int ti_cm_get_macid(struct device *dev, int slave, u8 *mac_addr)
80{
81	if (of_machine_is_compatible("ti,dm8148"))
82		return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
83
84	if (of_machine_is_compatible("ti,am33xx"))
85		return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
86
87	if (of_device_is_compatible(dev->of_node, "ti,am3517-emac"))
88		return davinci_emac_3517_get_macid(dev, 0x110, slave, mac_addr);
89
90	if (of_device_is_compatible(dev->of_node, "ti,dm816-emac"))
91		return cpsw_am33xx_cm_get_macid(dev, 0x30, slave, mac_addr);
92
93	if (of_machine_is_compatible("ti,am4372"))
94		return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
95
96	if (of_machine_is_compatible("ti,dra7"))
97		return davinci_emac_3517_get_macid(dev, 0x514, slave, mac_addr);
98
99	dev_err(dev, "incompatible machine/device type for reading mac address\n");
100	return -ENOENT;
101}
102EXPORT_SYMBOL_GPL(ti_cm_get_macid);
103
104MODULE_LICENSE("GPL");
105