C6X: general SoC support

/*

 * Miscellaneous SoC-specific hooks.

 *

 * Copyright (C) 2011 Texas Instruments Incorporated

 *

 * Author: Mark Salter <msalter@redhat.com>

 *

 * This file is licensed under the terms of the GNU General Public License

 * version 2. This program is licensed "as is" without any warranty of any

 * kind, whether express or implied.

 */

#ifndef _ASM_C6X_SOC_H

#define _ASM_C6X_SOC_H

struct soc_ops {

	/* Return active exception event or -1 if none */

	int		(*get_exception)(void);

	/* Assert an event */

	void		(*assert_event)(unsigned int evt);

};

extern struct soc_ops soc_ops;

extern int soc_get_exception(void);

extern void soc_assert_event(unsigned int event);

extern int soc_mac_addr(unsigned int index, u8 *addr);

/*

 * for mmio on SoC devices. regs are always same byte order as cpu.

 */

#define soc_readl(addr)    __raw_readl(addr)

#define soc_writel(b, addr) __raw_writel((b), (addr))

#endif /* _ASM_C6X_SOC_H */

/*

 *  Miscellaneous SoC-specific hooks.

 *

 *  Copyright (C) 2011 Texas Instruments Incorporated

 *  Author: Mark Salter <msalter@redhat.com>

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License version 2 as

 *  published by the Free Software Foundation.

 */

#include <linux/module.h>

#include <linux/ctype.h>

#include <linux/etherdevice.h>

#include <asm/system.h>

#include <asm/setup.h>

#include <asm/soc.h>

struct soc_ops soc_ops;

int soc_get_exception(void)

{

	if (!soc_ops.get_exception)

		return -1;

	return soc_ops.get_exception();

}

void soc_assert_event(unsigned int evt)

{

	if (soc_ops.assert_event)

		soc_ops.assert_event(evt);

}

static u8 cmdline_mac[6];

static int __init get_mac_addr_from_cmdline(char *str)

{

	int count, i, val;

	for (count = 0; count < 6 && *str; count++, str += 3) {

		if (!isxdigit(str[0]) || !isxdigit(str[1]))

			return 0;

		if (str[2] != ((count < 5) ? ':' : '\0'))

			return 0;

		for (i = 0, val = 0; i < 2; i++) {

			val = val << 4;

			val |= isdigit(str[i]) ?

				str[i] - '0' : toupper(str[i]) - 'A' + 10;

		}

		cmdline_mac[count] = val;

	}

	return 1;

}

__setup("emac_addr=", get_mac_addr_from_cmdline);

/*

 * Setup the MAC address for SoC ethernet devices.

 *

 * Before calling this function, the ethernet driver will have

 * initialized the addr with local-mac-address from the device

 * tree (if found). Allow command line to override, but not

 * the fused address.

 */

int soc_mac_addr(unsigned int index, u8 *addr)

{

	int i, have_dt_mac = 0, have_cmdline_mac = 0, have_fuse_mac = 0;

	for (i = 0; i < 6; i++) {

		if (cmdline_mac[i])

			have_cmdline_mac = 1;

		if (c6x_fuse_mac[i])

			have_fuse_mac = 1;

		if (addr[i])

			have_dt_mac = 1;

	}

	/* cmdline overrides all */

	if (have_cmdline_mac)

		memcpy(addr, cmdline_mac, 6);

	else if (!have_dt_mac) {

		if (have_fuse_mac)

			memcpy(addr, c6x_fuse_mac, 6);

		else

			random_ether_addr(addr);

	}

	/* adjust for specific EMAC device */

	addr[5] += index * c6x_num_cores;

	return 1;

}

EXPORT_SYMBOL_GPL(soc_mac_addr);