mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 19:26:16 +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>
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2000-2002
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
|
|
* Scott McNutt <smcnutt@psyent.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <timer.h>
|
|
#include <asm/io.h>
|
|
|
|
/* control register */
|
|
#define ALTERA_TIMER_CONT BIT(1) /* Continuous mode */
|
|
#define ALTERA_TIMER_START BIT(2) /* Start timer */
|
|
#define ALTERA_TIMER_STOP BIT(3) /* Stop timer */
|
|
|
|
struct altera_timer_regs {
|
|
u32 status; /* Timer status reg */
|
|
u32 control; /* Timer control reg */
|
|
u32 periodl; /* Timeout period low */
|
|
u32 periodh; /* Timeout period high */
|
|
u32 snapl; /* Snapshot low */
|
|
u32 snaph; /* Snapshot high */
|
|
};
|
|
|
|
struct altera_timer_platdata {
|
|
struct altera_timer_regs *regs;
|
|
};
|
|
|
|
static int altera_timer_get_count(struct udevice *dev, u64 *count)
|
|
{
|
|
struct altera_timer_platdata *plat = dev->platdata;
|
|
struct altera_timer_regs *const regs = plat->regs;
|
|
u32 val;
|
|
|
|
/* Trigger update */
|
|
writel(0x0, ®s->snapl);
|
|
|
|
/* Read timer value */
|
|
val = readl(®s->snapl) & 0xffff;
|
|
val |= (readl(®s->snaph) & 0xffff) << 16;
|
|
*count = timer_conv_64(~val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int altera_timer_probe(struct udevice *dev)
|
|
{
|
|
struct altera_timer_platdata *plat = dev->platdata;
|
|
struct altera_timer_regs *const regs = plat->regs;
|
|
|
|
writel(0, ®s->status);
|
|
writel(0, ®s->control);
|
|
writel(ALTERA_TIMER_STOP, ®s->control);
|
|
|
|
writel(0xffff, ®s->periodl);
|
|
writel(0xffff, ®s->periodh);
|
|
writel(ALTERA_TIMER_CONT | ALTERA_TIMER_START, ®s->control);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int altera_timer_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct altera_timer_platdata *plat = dev_get_platdata(dev);
|
|
|
|
plat->regs = map_physmem(devfdt_get_addr(dev),
|
|
sizeof(struct altera_timer_regs),
|
|
MAP_NOCACHE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct timer_ops altera_timer_ops = {
|
|
.get_count = altera_timer_get_count,
|
|
};
|
|
|
|
static const struct udevice_id altera_timer_ids[] = {
|
|
{ .compatible = "altr,timer-1.0" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(altera_timer) = {
|
|
.name = "altera_timer",
|
|
.id = UCLASS_TIMER,
|
|
.of_match = altera_timer_ids,
|
|
.ofdata_to_platdata = altera_timer_ofdata_to_platdata,
|
|
.platdata_auto_alloc_size = sizeof(struct altera_timer_platdata),
|
|
.probe = altera_timer_probe,
|
|
.ops = &altera_timer_ops,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|