75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2012-2014 Broadcom Corporation
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation version 2.
|
||
|
|
*
|
||
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
||
|
|
* kind, whether express or implied; without even the implied warranty
|
||
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/clocksource.h>
|
||
|
|
#include <linux/of_address.h>
|
||
|
|
#include <linux/of_platform.h>
|
||
|
|
|
||
|
|
#include <asm/mach/arch.h>
|
||
|
|
|
||
|
|
#include "kona_l2_cache.h"
|
||
|
|
|
||
|
|
#define SECWDOG_OFFSET 0x00000000
|
||
|
|
#define SECWDOG_RESERVED_MASK 0xe2000000
|
||
|
|
#define SECWDOG_WD_LOAD_FLAG_MASK 0x10000000
|
||
|
|
#define SECWDOG_EN_MASK 0x08000000
|
||
|
|
#define SECWDOG_SRSTEN_MASK 0x04000000
|
||
|
|
#define SECWDOG_CLKS_SHIFT 20
|
||
|
|
#define SECWDOG_COUNT_SHIFT 0
|
||
|
|
|
||
|
|
static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
|
||
|
|
{
|
||
|
|
uint32_t val;
|
||
|
|
void __iomem *base;
|
||
|
|
struct device_node *np_wdog;
|
||
|
|
|
||
|
|
np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
|
||
|
|
if (!np_wdog) {
|
||
|
|
pr_emerg("Couldn't find brcm,kona-wdt\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
base = of_iomap(np_wdog, 0);
|
||
|
|
if (!base) {
|
||
|
|
pr_emerg("Couldn't map brcm,kona-wdt\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Enable watchdog with short timeout (244us). */
|
||
|
|
val = readl(base + SECWDOG_OFFSET);
|
||
|
|
val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
|
||
|
|
val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
|
||
|
|
(0x15 << SECWDOG_CLKS_SHIFT) |
|
||
|
|
(0x8 << SECWDOG_COUNT_SHIFT);
|
||
|
|
writel(val, base + SECWDOG_OFFSET);
|
||
|
|
|
||
|
|
/* Wait for reset */
|
||
|
|
while (1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __init bcm281xx_init(void)
|
||
|
|
{
|
||
|
|
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
|
||
|
|
kona_l2_cache_init();
|
||
|
|
}
|
||
|
|
|
||
|
|
static const char * const bcm281xx_dt_compat[] = {
|
||
|
|
"brcm,bcm11351", /* Have to use the first number upstreamed */
|
||
|
|
NULL,
|
||
|
|
};
|
||
|
|
|
||
|
|
DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")
|
||
|
|
.init_machine = bcm281xx_init,
|
||
|
|
.restart = bcm281xx_restart,
|
||
|
|
.dt_compat = bcm281xx_dt_compat,
|
||
|
|
MACHINE_END
|