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/*
* 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) 2012 Thomas Langer <thomas.langer@lantiq.com>
* Copyright (C) 2012 John Crispin <blogic@openwrt.org>
*/
#include <linux/kernel.h>
#include <asm/cacheflush.h>
#include <asm/traps.h>
#include <asm/io.h>
#include <lantiq_soc.h>
#include "../prom.h"
#define SOC_FALCON "Falcon"
#define SOC_FALCON_D "Falcon-D"
#define SOC_FALCON_V "Falcon-V"
#define SOC_FALCON_M "Falcon-M"
#define COMP_FALCON "lantiq,falcon"
#define PART_SHIFT 12
#define PART_MASK 0x0FFFF000
#define REV_SHIFT 28
#define REV_MASK 0xF0000000
#define SREV_SHIFT 22
#define SREV_MASK 0x03C00000
#define TYPE_SHIFT 26
#define TYPE_MASK 0x3C000000
/* reset, nmi and ejtag exception vectors */
#define BOOT_REG_BASE (KSEG1 | 0x1F200000)
#define BOOT_RVEC (BOOT_REG_BASE | 0x00)
#define BOOT_NVEC (BOOT_REG_BASE | 0x04)
#define BOOT_EVEC (BOOT_REG_BASE | 0x08)
void __init ltq_soc_nmi_setup(void)
{
extern void (*nmi_handler)(void);
ltq_w32((unsigned long)&nmi_handler, (void *)BOOT_NVEC);
}
void __init ltq_soc_ejtag_setup(void)
{
extern void (*ejtag_debug_handler)(void);
ltq_w32((unsigned long)&ejtag_debug_handler, (void *)BOOT_EVEC);
}
void __init ltq_soc_detect(struct ltq_soc_info *i)
{
u32 type;
i->partnum = (ltq_r32(FALCON_CHIPID) & PART_MASK) >> PART_SHIFT;
i->rev = (ltq_r32(FALCON_CHIPID) & REV_MASK) >> REV_SHIFT;
i->srev = ((ltq_r32(FALCON_CHIPCONF) & SREV_MASK) >> SREV_SHIFT);
i->compatible = COMP_FALCON;
i->type = SOC_TYPE_FALCON;
sprintf(i->rev_type, "%c%d%d", (i->srev & 0x4) ? ('B') : ('A'),
i->rev & 0x7, (i->srev & 0x3) + 1);
switch (i->partnum) {
case SOC_ID_FALCON:
type = (ltq_r32(FALCON_CHIPTYPE) & TYPE_MASK) >> TYPE_SHIFT;
switch (type) {
case 0:
i->name = SOC_FALCON_D;
break;
case 1:
i->name = SOC_FALCON_V;
break;
case 2:
i->name = SOC_FALCON_M;
break;
default:
i->name = SOC_FALCON;
break;
}
break;
default:
unreachable();
break;
}
board_nmi_handler_setup = ltq_soc_nmi_setup;
board_ejtag_handler_setup = ltq_soc_ejtag_setup;
}
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