arch/mips/lantiq/prom.c

/*
 *  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.
 *
 * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
 */

#include <linux/export.h>
#include <linux/clk.h>
#include <asm/bootinfo.h>
#include <asm/time.h>

#include <lantiq.h>

#include "prom.h"
#include "clk.h"

static struct ltq_soc_info soc_info;

unsigned int ltq_get_cpu_ver(void)
{
	return soc_info.rev;
}
EXPORT_SYMBOL(ltq_get_cpu_ver);

unsigned int ltq_get_soc_type(void)
{
	return soc_info.type;
}
EXPORT_SYMBOL(ltq_get_soc_type);

const char *get_system_type(void)
{
	return soc_info.sys_type;
}

void prom_free_prom_memory(void)
{
}

static void __init prom_init_cmdline(void)
{
	int argc = fw_arg0;
	char **argv = (char **) KSEG1ADDR(fw_arg1);
	int i;

	arcs_cmdline[0] = '\0';

	for (i = 0; i < argc; i++) {
		char *p = (char *) KSEG1ADDR(argv[i]);

		if (CPHYSADDR(p) && *p) {
			strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
			strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
		}
	}
}

void __init prom_init(void)
{
	struct clk *clk;

	ltq_soc_detect(&soc_info);
	clk_init();
	clk = clk_get(0, "cpu");
	snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev1.%d",
		soc_info.name, soc_info.rev);
	clk_put(clk);
	soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
	pr_info("SoC: %s\n", soc_info.sys_type);
	prom_init_cmdline();

#if defined(CONFIG_MIPS_MT_SMP)
	if (register_vsmp_smp_ops())
		panic("failed to register_vsmp_smp_ops()");
#endif
}