Kevin
68d74d3181
submodule of avionic design uboot bootloader and with included tools to get you started , read readme.md and readme-tk1-loader.md
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* Copyright 2016 Avionic Design GmbH
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* Copyright 2016 Julian Scheel <julian@jusst.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <asm/io.h>
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#include <asm/arch-tegra/wdt.h>
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#include <asm/arch-tegra/tegra.h>
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/* Timeout in seconds */
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#define WDT_TIMEOUT 60
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/* Timer to use - 5 is used in linux kernel */
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#define WDT_TIMER_ID 5
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void hw_watchdog_init(void)
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{
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struct timer_ctrl *timer = (struct timer_ctrl *)NV_PA_TMR5_BASE;
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struct wdt_ctrl *wdt = (struct wdt_ctrl *)NV_PA_TMRWDT0_BASE;
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u32 val;
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/* Timer runs fixed at 1 MHz, reset is triggered at 4th timeout of
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* timer */
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val = 1000000ul / 4;
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val |= (TIMER_PTV_EN | TIMER_PTV_PERIODIC);
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writel(val, &timer->ptv);
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/* Setup actual wdt */
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val = WDT_TIMER_ID |
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((WDT_TIMEOUT << WDT_CFG_PERIOD_SHIFT) & WDT_CFG_PERIOD_MASK) |
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WDT_CFG_PMC2CAR_RST_EN;
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writel(val, &wdt->config);
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/* Activate the wdt */
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writel(WDT_CMD_START_COUNTER, &wdt->command);
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}
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void hw_watchdog_reset(void)
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{
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struct wdt_ctrl *wdt = (struct wdt_ctrl *)NV_PA_TMRWDT0_BASE;
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/* Activate the wdt */
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writel(WDT_CMD_START_COUNTER, &wdt->command);
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}
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void hw_watchdog_disable(void)
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{
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struct timer_ctrl *timer = (struct timer_ctrl *)NV_PA_TMR5_BASE;
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struct wdt_ctrl *wdt = (struct wdt_ctrl *)NV_PA_TMRWDT0_BASE;
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/* Write unlock pattern */
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writel(WDT_UNLOCK_PATTERN, &wdt->unlock);
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/* Disable wdt */
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writel(WDT_CMD_DISABLE_COUNTER, &wdt->command);
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/* Stop timer */
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writel(0, &timer->ptv);
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}
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