blob: 6e20b4fc337bacbd58d46ce665c19490ff1f0cef [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
rickf5076f82017-05-17 10:59:20 +08002/*
3 * Andestech ATFTMR010 timer driver
4 *
5 * (C) Copyright 2016
6 * Rick Chen, NDS32 Software Engineering, rick@andestech.com
rickf5076f82017-05-17 10:59:20 +08007 */
8#include <common.h>
9#include <dm.h>
10#include <errno.h>
11#include <timer.h>
12#include <linux/io.h>
13
rickf5076f82017-05-17 10:59:20 +080014/*
15 * Timer Control Register
16 */
17#define T3_UPDOWN (1 << 11)
18#define T2_UPDOWN (1 << 10)
19#define T1_UPDOWN (1 << 9)
20#define T3_OFENABLE (1 << 8)
21#define T3_CLOCK (1 << 7)
22#define T3_ENABLE (1 << 6)
23#define T2_OFENABLE (1 << 5)
24#define T2_CLOCK (1 << 4)
25#define T2_ENABLE (1 << 3)
26#define T1_OFENABLE (1 << 2)
27#define T1_CLOCK (1 << 1)
28#define T1_ENABLE (1 << 0)
29
30/*
31 * Timer Interrupt State & Mask Registers
32 */
33#define T3_OVERFLOW (1 << 8)
34#define T3_MATCH2 (1 << 7)
35#define T3_MATCH1 (1 << 6)
36#define T2_OVERFLOW (1 << 5)
37#define T2_MATCH2 (1 << 4)
38#define T2_MATCH1 (1 << 3)
39#define T1_OVERFLOW (1 << 2)
40#define T1_MATCH2 (1 << 1)
41#define T1_MATCH1 (1 << 0)
42
43struct atftmr_timer_regs {
44 u32 t1_counter; /* 0x00 */
45 u32 t1_load; /* 0x04 */
46 u32 t1_match1; /* 0x08 */
47 u32 t1_match2; /* 0x0c */
48 u32 t2_counter; /* 0x10 */
49 u32 t2_load; /* 0x14 */
50 u32 t2_match1; /* 0x18 */
51 u32 t2_match2; /* 0x1c */
52 u32 t3_counter; /* 0x20 */
53 u32 t3_load; /* 0x24 */
54 u32 t3_match1; /* 0x28 */
55 u32 t3_match2; /* 0x2c */
56 u32 cr; /* 0x30 */
57 u32 int_state; /* 0x34 */
58 u32 int_mask; /* 0x38 */
59};
60
61struct atftmr_timer_platdata {
62 struct atftmr_timer_regs *regs;
63};
64
65static int atftmr_timer_get_count(struct udevice *dev, u64 *count)
66{
67 struct atftmr_timer_platdata *plat = dev->platdata;
68 struct atftmr_timer_regs *const regs = plat->regs;
69 u32 val;
70 val = readl(&regs->t3_counter);
71 *count = timer_conv_64(val);
72 return 0;
73}
74
75static int atftmr_timer_probe(struct udevice *dev)
76{
77 struct atftmr_timer_platdata *plat = dev->platdata;
78 struct atftmr_timer_regs *const regs = plat->regs;
79 u32 cr;
80 writel(0, &regs->t3_load);
81 writel(0, &regs->t3_counter);
82 writel(TIMER_LOAD_VAL, &regs->t3_match1);
83 writel(TIMER_LOAD_VAL, &regs->t3_match2);
84 /* disable interrupts */
85 writel(T3_MATCH1|T3_MATCH2|T3_OVERFLOW , &regs->int_mask);
86 cr = readl(&regs->cr);
87 cr |= (T3_ENABLE|T3_UPDOWN);
88 writel(cr, &regs->cr);
89 return 0;
90}
91
92static int atftme_timer_ofdata_to_platdata(struct udevice *dev)
93{
94 struct atftmr_timer_platdata *plat = dev_get_platdata(dev);
Simon Glassa821c4a2017-05-17 17:18:05 -060095 plat->regs = map_physmem(devfdt_get_addr(dev),
rickf5076f82017-05-17 10:59:20 +080096 sizeof(struct atftmr_timer_regs),
97 MAP_NOCACHE);
98 return 0;
99}
100
101static const struct timer_ops ag101p_timer_ops = {
102 .get_count = atftmr_timer_get_count,
103};
104
105static const struct udevice_id ag101p_timer_ids[] = {
106 { .compatible = "andestech,attmr010" },
107 {}
108};
109
110U_BOOT_DRIVER(altera_timer) = {
111 .name = "ag101p_timer",
112 .id = UCLASS_TIMER,
113 .of_match = ag101p_timer_ids,
114 .ofdata_to_platdata = atftme_timer_ofdata_to_platdata,
115 .platdata_auto_alloc_size = sizeof(struct atftmr_timer_platdata),
116 .probe = atftmr_timer_probe,
117 .ops = &ag101p_timer_ops,
rickf5076f82017-05-17 10:59:20 +0800118};