tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * linux/include/asm-arm/arm/arch-omap/dmtimer.h
3 *
4 * OMAP Dual-Mode Timers
5 *
6 * Copyright (C) 2005 Nokia Corporation
7 * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
15 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
17 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22 *
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28#ifndef __ASM_ARCH_TIMER_H
29#define __ASM_ARCH_TIMER_H
30
31#include <linux/list.h>
32
33#define OMAP_TIMER_SRC_ARMXOR 0x00
34#define OMAP_TIMER_SRC_32_KHZ 0x01
35#define OMAP_TIMER_SRC_EXT_CLK 0x02
36
37/* timer control reg bits */
38#define OMAP_TIMER_CTRL_CAPTMODE (1 << 13)
39#define OMAP_TIMER_CTRL_PT (1 << 12)
40#define OMAP_TIMER_CTRL_TRG_OVERFLOW (0x1 << 10)
41#define OMAP_TIMER_CTRL_TRG_OFANDMATCH (0x2 << 10)
42#define OMAP_TIMER_CTRL_TCM_LOWTOHIGH (0x1 << 8)
43#define OMAP_TIMER_CTRL_TCM_HIGHTOLOW (0x2 << 8)
44#define OMAP_TIMER_CTRL_TCM_BOTHEDGES (0x3 << 8)
45#define OMAP_TIMER_CTRL_SCPWM (1 << 7)
46#define OMAP_TIMER_CTRL_CE (1 << 6) /* compare enable */
47#define OMAP_TIMER_CTRL_PRE (1 << 5) /* prescaler enable */
48#define OMAP_TIMER_CTRL_PTV_SHIFT 2 /* how much to shift the prescaler value */
49#define OMAP_TIMER_CTRL_AR (1 << 1) /* auto-reload enable */
50#define OMAP_TIMER_CTRL_ST (1 << 0) /* start timer */
51
52/* timer interrupt enable bits */
53#define OMAP_TIMER_INT_CAPTURE (1 << 2)
54#define OMAP_TIMER_INT_OVERFLOW (1 << 1)
55#define OMAP_TIMER_INT_MATCH (1 << 0)
56
57
58struct omap_dm_timer {
59 struct list_head timer_list;
60
61 u32 base;
62 unsigned int irq;
63};
64
65u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg);
66void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value);
67
68struct omap_dm_timer * omap_dm_timer_request(void);
69void omap_dm_timer_free(struct omap_dm_timer *timer);
70void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source);
71
72void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value);
73void omap_dm_timer_set_trigger(struct omap_dm_timer *timer, unsigned int value);
74void omap_dm_timer_enable_compare(struct omap_dm_timer *timer);
75void omap_dm_timer_enable_autoreload(struct omap_dm_timer *timer);
76
77void omap_dm_timer_trigger(struct omap_dm_timer *timer);
78void omap_dm_timer_start(struct omap_dm_timer *timer);
79void omap_dm_timer_stop(struct omap_dm_timer *timer);
80
81void omap_dm_timer_set_load(struct omap_dm_timer *timer, unsigned int load);
82void omap_dm_timer_set_match(struct omap_dm_timer *timer, unsigned int match);
83
84unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer);
85void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value);
86
87unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer);
88void omap_dm_timer_reset_counter(struct omap_dm_timer *timer);
89
90int omap_dm_timers_active(void);
91
92#endif /* __ASM_ARCH_TIMER_H */