1/*
2 *  Miscellaneous SoC-specific hooks.
3 *
4 *  Copyright (C) 2011 Texas Instruments Incorporated
5 *  Author: Mark Salter <msalter@redhat.com>
6 *
7 *  This program is free software; you can redistribute it and/or modify
8 *  it under the terms of the GNU General Public License version 2 as
9 *  published by the Free Software Foundation.
10 */
11#include <linux/module.h>
12#include <linux/ctype.h>
13#include <linux/etherdevice.h>
14#include <asm/setup.h>
15#include <asm/soc.h>
16
17struct soc_ops soc_ops;
18
19int soc_get_exception(void)
20{
21	if (!soc_ops.get_exception)
22		return -1;
23	return soc_ops.get_exception();
24}
25
26void soc_assert_event(unsigned int evt)
27{
28	if (soc_ops.assert_event)
29		soc_ops.assert_event(evt);
30}
31
32static u8 cmdline_mac[6];
33
34static int __init get_mac_addr_from_cmdline(char *str)
35{
36	int count, i, val;
37
38	for (count = 0; count < 6 && *str; count++, str += 3) {
39		if (!isxdigit(str[0]) || !isxdigit(str[1]))
40			return 0;
41		if (str[2] != ((count < 5) ? ':' : '\0'))
42			return 0;
43
44		for (i = 0, val = 0; i < 2; i++) {
45			val = val << 4;
46			val |= isdigit(str[i]) ?
47				str[i] - '0' : toupper(str[i]) - 'A' + 10;
48		}
49		cmdline_mac[count] = val;
50	}
51	return 1;
52}
53__setup("emac_addr=", get_mac_addr_from_cmdline);
54
55/*
56 * Setup the MAC address for SoC ethernet devices.
57 *
58 * Before calling this function, the ethernet driver will have
59 * initialized the addr with local-mac-address from the device
60 * tree (if found). Allow command line to override, but not
61 * the fused address.
62 */
63int soc_mac_addr(unsigned int index, u8 *addr)
64{
65	int i, have_dt_mac = 0, have_cmdline_mac = 0, have_fuse_mac = 0;
66
67	for (i = 0; i < 6; i++) {
68		if (cmdline_mac[i])
69			have_cmdline_mac = 1;
70		if (c6x_fuse_mac[i])
71			have_fuse_mac = 1;
72		if (addr[i])
73			have_dt_mac = 1;
74	}
75
76	/* cmdline overrides all */
77	if (have_cmdline_mac)
78		memcpy(addr, cmdline_mac, 6);
79	else if (!have_dt_mac) {
80		if (have_fuse_mac)
81			memcpy(addr, c6x_fuse_mac, 6);
82		else
83			eth_random_addr(addr);
84	}
85
86	/* adjust for specific EMAC device */
87	addr[5] += index * c6x_num_cores;
88	return 1;
89}
90EXPORT_SYMBOL_GPL(soc_mac_addr);
91