mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2003
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* Texas Instruments <www.ti.com>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* (C) Copyright 2002-2004
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* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
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*
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* (C) Copyright 2004
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* Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
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*
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* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/timer_defs.h>
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#include <div64.h>
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DECLARE_GLOBAL_DATA_PTR;
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static struct davinci_timer * const timer =
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(struct davinci_timer *)CONFIG_SYS_TIMERBASE;
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#define TIMER_LOAD_VAL 0xffffffff
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#define TIM_CLK_DIV 16
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int timer_init(void)
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{
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/* We are using timer34 in unchained 32-bit mode, full speed */
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writel(0x0, &timer->tcr);
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writel(0x0, &timer->tgcr);
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writel(0x06 | ((TIM_CLK_DIV - 1) << 8), &timer->tgcr);
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writel(0x0, &timer->tim34);
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writel(TIMER_LOAD_VAL, &timer->prd34);
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writel(2 << 22, &timer->tcr);
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gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK / TIM_CLK_DIV;
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gd->arch.timer_reset_value = 0;
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return(0);
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}
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/*
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* Get the current 64 bit timer tick count
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*/
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unsigned long long get_ticks(void)
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{
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unsigned long now = readl(&timer->tim34);
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/* increment tbu if tbl has rolled over */
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if (now < gd->arch.tbl)
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gd->arch.tbu++;
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gd->arch.tbl = now;
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return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl;
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}
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ulong get_timer(ulong base)
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{
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unsigned long long timer_diff;
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timer_diff = get_ticks() - gd->arch.timer_reset_value;
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return lldiv(timer_diff,
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(gd->arch.timer_rate_hz / CONFIG_SYS_HZ)) - base;
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}
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void __udelay(unsigned long usec)
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{
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unsigned long long endtime;
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endtime = lldiv((unsigned long long)usec * gd->arch.timer_rate_hz,
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1000000UL);
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endtime += get_ticks();
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while (get_ticks() < endtime)
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;
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}
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/*
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* This function is derived from PowerPC code (timebase clock frequency).
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* On ARM it returns the number of timer ticks per second.
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*/
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ulong get_tbclk(void)
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{
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return gd->arch.timer_rate_hz;
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}
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#ifdef CONFIG_HW_WATCHDOG
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static struct davinci_timer * const wdttimer =
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(struct davinci_timer *)CONFIG_SYS_WDTTIMERBASE;
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/*
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* See prufw2.pdf for using Timer as a WDT
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*/
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void davinci_hw_watchdog_enable(void)
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{
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writel(0x0, &wdttimer->tcr);
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writel(0x0, &wdttimer->tgcr);
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/* TIMMODE = 2h */
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writel(0x08 | 0x03 | ((TIM_CLK_DIV - 1) << 8), &wdttimer->tgcr);
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writel(CONFIG_SYS_WDT_PERIOD_LOW, &wdttimer->prd12);
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writel(CONFIG_SYS_WDT_PERIOD_HIGH, &wdttimer->prd34);
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writel(2 << 22, &wdttimer->tcr);
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writel(0x0, &wdttimer->tim12);
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writel(0x0, &wdttimer->tim34);
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/* set WDEN bit, WDKEY 0xa5c6 */
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writel(0xa5c64000, &wdttimer->wdtcr);
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/* clear counter register */
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writel(0xda7e4000, &wdttimer->wdtcr);
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}
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void davinci_hw_watchdog_reset(void)
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{
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writel(0xa5c64000, &wdttimer->wdtcr);
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writel(0xda7e4000, &wdttimer->wdtcr);
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}
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#endif
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