mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-22 02:49:44 +09:00
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>
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2007, 2012 Freescale Semiconductor, Inc.
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* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
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*/
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#include <common.h>
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#include <asm/timer.h>
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#include <asm/immap.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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static ulong timestamp;
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#if defined(CONFIG_SLTTMR)
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#ifndef CONFIG_SYS_UDELAY_BASE
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# error "uDelay base not defined!"
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#endif
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#if !defined(CONFIG_SYS_TMR_BASE) || !defined(CONFIG_SYS_INTR_BASE) || !defined(CONFIG_SYS_TMRINTR_NO) || !defined(CONFIG_SYS_TMRINTR_MASK)
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# error "TMR_BASE, INTR_BASE, TMRINTR_NO or TMRINTR_MASk not defined!"
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#endif
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extern void dtimer_intr_setup(void);
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void __udelay(unsigned long usec)
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{
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slt_t *timerp = (slt_t *) (CONFIG_SYS_UDELAY_BASE);
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u32 now, freq;
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/* 1 us period */
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freq = CONFIG_SYS_TIMER_PRESCALER;
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/* Disable */
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out_be32(&timerp->cr, 0);
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out_be32(&timerp->tcnt, usec * freq);
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out_be32(&timerp->cr, SLT_CR_TEN);
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now = in_be32(&timerp->cnt);
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while (now != 0)
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now = in_be32(&timerp->cnt);
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setbits_be32(&timerp->sr, SLT_SR_ST);
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out_be32(&timerp->cr, 0);
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}
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void dtimer_interrupt(void *not_used)
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{
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slt_t *timerp = (slt_t *) (CONFIG_SYS_TMR_BASE);
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/* check for timer interrupt asserted */
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if ((CONFIG_SYS_TMRPND_REG & CONFIG_SYS_TMRINTR_MASK) == CONFIG_SYS_TMRINTR_PEND) {
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setbits_be32(&timerp->sr, SLT_SR_ST);
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timestamp++;
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return;
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}
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}
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int timer_init(void)
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{
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slt_t *timerp = (slt_t *) (CONFIG_SYS_TMR_BASE);
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timestamp = 0;
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/* disable timer */
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out_be32(&timerp->cr, 0);
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out_be32(&timerp->tcnt, 0);
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/* clear status */
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out_be32(&timerp->sr, SLT_SR_BE | SLT_SR_ST);
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/* initialize and enable timer interrupt */
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irq_install_handler(CONFIG_SYS_TMRINTR_NO, dtimer_interrupt, 0);
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/* Interrupt every ms */
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out_be32(&timerp->tcnt, 1000 * CONFIG_SYS_TIMER_PRESCALER);
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dtimer_intr_setup();
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/* set a period of 1us, set timer mode to restart and
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enable timer and interrupt */
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out_be32(&timerp->cr, SLT_CR_RUN | SLT_CR_IEN | SLT_CR_TEN);
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return 0;
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}
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ulong get_timer(ulong base)
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{
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return (timestamp - base);
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}
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#endif /* CONFIG_SLTTMR */
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