| /* |
| * 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, |
| &platform_bus); |
| 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 |