Djam/u-boot
1
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-05-08 19:11:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

nds32: Support AG101P timer DM.

Browse source 
Support AG101P timer device tree flow.

Signed-off-by: rick <rick@andestech.com>
This commit is contained in:
rick 2017-05-17 10:59:20 +08:00 • committed by Andes
parent 86132af799
commit f5076f8698
6 changed files with 141 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

122
drivers/timer/ag101p_timer.c Normal file
View file

@ -0,0 +1,122 @@
/*
* Andestech ATFTMR010 timer driver
*
* (C) Copyright 2016
* Rick Chen, NDS32 Software Engineering, rick@andestech.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <timer.h>
#include <linux/io.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Timer Control Register
*/
#define T3_UPDOWN (1 << 11)
#define T2_UPDOWN (1 << 10)
#define T1_UPDOWN (1 << 9)
#define T3_OFENABLE (1 << 8)
#define T3_CLOCK (1 << 7)
#define T3_ENABLE (1 << 6)
#define T2_OFENABLE (1 << 5)
#define T2_CLOCK (1 << 4)
#define T2_ENABLE (1 << 3)
#define T1_OFENABLE (1 << 2)
#define T1_CLOCK (1 << 1)
#define T1_ENABLE (1 << 0)
/*
* Timer Interrupt State & Mask Registers
*/
#define T3_OVERFLOW (1 << 8)
#define T3_MATCH2 (1 << 7)
#define T3_MATCH1 (1 << 6)
#define T2_OVERFLOW (1 << 5)
#define T2_MATCH2 (1 << 4)
#define T2_MATCH1 (1 << 3)
#define T1_OVERFLOW (1 << 2)
#define T1_MATCH2 (1 << 1)
#define T1_MATCH1 (1 << 0)
struct atftmr_timer_regs {
u32 t1_counter; /* 0x00 */
u32 t1_load; /* 0x04 */
u32 t1_match1; /* 0x08 */
u32 t1_match2; /* 0x0c */
u32 t2_counter; /* 0x10 */
u32 t2_load; /* 0x14 */
u32 t2_match1; /* 0x18 */
u32 t2_match2; /* 0x1c */
u32 t3_counter; /* 0x20 */
u32 t3_load; /* 0x24 */
u32 t3_match1; /* 0x28 */
u32 t3_match2; /* 0x2c */
u32 cr; /* 0x30 */
u32 int_state; /* 0x34 */
u32 int_mask; /* 0x38 */
};
struct atftmr_timer_platdata {
struct atftmr_timer_regs *regs;
};
static int atftmr_timer_get_count(struct udevice *dev, u64 *count)
{
struct atftmr_timer_platdata *plat = dev->platdata;
struct atftmr_timer_regs *const regs = plat->regs;
u32 val;
val = readl(&regs->t3_counter);
*count = timer_conv_64(val);
return 0;
}
static int atftmr_timer_probe(struct udevice *dev)
{
struct atftmr_timer_platdata *plat = dev->platdata;
struct atftmr_timer_regs *const regs = plat->regs;
u32 cr;
writel(0, &regs->t3_load);
writel(0, &regs->t3_counter);
writel(TIMER_LOAD_VAL, &regs->t3_match1);
writel(TIMER_LOAD_VAL, &regs->t3_match2);
/* disable interrupts */
writel(T3_MATCH1|T3_MATCH2|T3_OVERFLOW , &regs->int_mask);
cr = readl(&regs->cr);
cr |= (T3_ENABLE|T3_UPDOWN);
writel(cr, &regs->cr);
return 0;
}
static int atftme_timer_ofdata_to_platdata(struct udevice *dev)
{
struct atftmr_timer_platdata *plat = dev_get_platdata(dev);
plat->regs = map_physmem(dev_get_addr(dev),
sizeof(struct atftmr_timer_regs),
MAP_NOCACHE);
return 0;
}
static const struct timer_ops ag101p_timer_ops = {
.get_count = atftmr_timer_get_count,
};
static const struct udevice_id ag101p_timer_ids[] = {
{ .compatible = "andestech,attmr010" },
{}
};
U_BOOT_DRIVER(altera_timer) = {
.name = "ag101p_timer",
.id = UCLASS_TIMER,
.of_match = ag101p_timer_ids,
.ofdata_to_platdata = atftme_timer_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct atftmr_timer_platdata),
.probe = atftmr_timer_probe,
.ops = &ag101p_timer_ops,
.flags = DM_FLAG_PRE_RELOC,
};