62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Watchdog driver
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* Copyright (C) 2019 frank <frank@allwinnertech.com>
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*/
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#include <asm/io.h>
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#include <asm/arch/watchdog.h>
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#include <common.h>
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#include <sunxi_board.h>
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static const int wdt_timeout_map[] = {
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[1] = 0x1, /* 1s */
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[2] = 0x2, /* 2s */
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[3] = 0x3, /* 3s */
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[4] = 0x4, /* 4s */
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[5] = 0x5, /* 5s */
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[6] = 0x6, /* 6s */
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[8] = 0x7, /* 8s */
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[10] = 0x8, /* 10s */
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[12] = 0x9, /* 12s */
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[14] = 0xA, /* 14s */
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[16] = 0xB, /* 16s */
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};
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void hw_watchdog_disable(void)
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{
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struct sunxi_wdog *wdt = (struct sunxi_wdog *)WATCH_BASE;
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unsigned int wtmode;
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wtmode = readl(&wdt->mode);
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wtmode &= ~WDT_MODE_EN;
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writel(wtmode, &wdt->mode);
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}
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static void watchdog_reset(int timeout)
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{
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struct sunxi_wdog *wdt = (struct sunxi_wdog *)WATCH_BASE;
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unsigned int wtmode;
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hw_watchdog_disable();
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if (wdt_timeout_map[timeout] == 0)
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timeout++;
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wtmode = wdt_timeout_map[timeout] << 4 | WDT_MODE_EN;
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writel(WDT_CFG_RESET, &wdt->cfg);
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writel(wtmode, &wdt->mode);
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writel(WDT_CTRL_KEY | WDT_CTRL_RESTART, &wdt->ctl);
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}
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void hw_watchdog_reset(void)
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{
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/* open wdog only when normal boot*/
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if (get_boot_work_mode())
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return;
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watchdog_reset(WDOG_TIMEOUT);
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}
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