mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-11-04 10:21:25 +01:00
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>
115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Andestech ATCPIT100 timer driver
|
|
*
|
|
* (C) Copyright 2016
|
|
* Rick Chen, NDS32 Software Engineering, rick@andestech.com
|
|
*/
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <timer.h>
|
|
#include <linux/io.h>
|
|
|
|
#define REG32_TMR(x) (*(u32 *) ((plat->regs) + (x>>2)))
|
|
|
|
/*
|
|
* Definition of register offsets
|
|
*/
|
|
|
|
/* ID and Revision Register */
|
|
#define ID_REV 0x0
|
|
|
|
/* Configuration Register */
|
|
#define CFG 0x10
|
|
|
|
/* Interrupt Enable Register */
|
|
#define INT_EN 0x14
|
|
#define CH_INT_EN(c , i) ((1<<i)<<(4*c))
|
|
|
|
/* Interrupt Status Register */
|
|
#define INT_STA 0x18
|
|
#define CH_INT_STA(c , i) ((1<<i)<<(4*c))
|
|
|
|
/* Channel Enable Register */
|
|
#define CH_EN 0x1C
|
|
#define CH_TMR_EN(c , t) ((1<<t)<<(4*c))
|
|
|
|
/* Ch n Control REgister */
|
|
#define CH_CTL(n) (0x20+0x10*n)
|
|
/* Channel clock source , bit 3 , 0:External clock , 1:APB clock */
|
|
#define APB_CLK (1<<3)
|
|
/* Channel mode , bit 0~2 */
|
|
#define TMR_32 1
|
|
#define TMR_16 2
|
|
#define TMR_8 3
|
|
#define PWM 4
|
|
|
|
#define CH_REL(n) (0x24+0x10*n)
|
|
#define CH_CNT(n) (0x28+0x10*n)
|
|
|
|
struct atctmr_timer_regs {
|
|
u32 id_rev; /* 0x00 */
|
|
u32 reservd[3]; /* 0x04 ~ 0x0c */
|
|
u32 cfg; /* 0x10 */
|
|
u32 int_en; /* 0x14 */
|
|
u32 int_st; /* 0x18 */
|
|
u32 ch_en; /* 0x1c */
|
|
u32 ch0_ctrl; /* 0x20 */
|
|
u32 ch0_reload; /* 0x24 */
|
|
u32 ch0_cntr; /* 0x28 */
|
|
u32 reservd1; /* 0x2c */
|
|
u32 ch1_ctrl; /* 0x30 */
|
|
u32 ch1_reload; /* 0x34 */
|
|
u32 int_mask; /* 0x38 */
|
|
};
|
|
|
|
struct atcpit_timer_platdata {
|
|
u32 *regs;
|
|
};
|
|
|
|
static int atcpit_timer_get_count(struct udevice *dev, u64 *count)
|
|
{
|
|
struct atcpit_timer_platdata *plat = dev_get_platdata(dev);
|
|
u32 val;
|
|
val = ~(REG32_TMR(CH_CNT(1))+0xffffffff);
|
|
*count = timer_conv_64(val);
|
|
return 0;
|
|
}
|
|
|
|
static int atcpit_timer_probe(struct udevice *dev)
|
|
{
|
|
struct atcpit_timer_platdata *plat = dev_get_platdata(dev);
|
|
REG32_TMR(CH_REL(1)) = 0xffffffff;
|
|
REG32_TMR(CH_CTL(1)) = APB_CLK|TMR_32;
|
|
REG32_TMR(CH_EN) |= CH_TMR_EN(1 , 0);
|
|
return 0;
|
|
}
|
|
|
|
static int atcpit_timer_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct atcpit_timer_platdata *plat = dev_get_platdata(dev);
|
|
plat->regs = map_physmem(devfdt_get_addr(dev) , 0x100 , MAP_NOCACHE);
|
|
return 0;
|
|
}
|
|
|
|
static const struct timer_ops atcpit_timer_ops = {
|
|
.get_count = atcpit_timer_get_count,
|
|
};
|
|
|
|
static const struct udevice_id atcpit_timer_ids[] = {
|
|
{ .compatible = "andestech,atcpit100" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(atcpit100_timer) = {
|
|
.name = "atcpit100_timer",
|
|
.id = UCLASS_TIMER,
|
|
.of_match = atcpit_timer_ids,
|
|
.ofdata_to_platdata = atcpit_timer_ofdata_to_platdata,
|
|
.platdata_auto_alloc_size = sizeof(struct atcpit_timer_platdata),
|
|
.probe = atcpit_timer_probe,
|
|
.ops = &atcpit_timer_ops,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|