dmtimer.h
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上传日期:2009-04-28
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- /*
- * linux/include/asm-arm/arm/arch-omap/dmtimer.h
- *
- * OMAP Dual-Mode Timers
- *
- * Copyright (C) 2005 Nokia Corporation
- * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #ifndef __ASM_ARCH_TIMER_H
- #define __ASM_ARCH_TIMER_H
- #include <linux/list.h>
- #define OMAP_TIMER_SRC_ARMXOR 0x00
- #define OMAP_TIMER_SRC_32_KHZ 0x01
- #define OMAP_TIMER_SRC_EXT_CLK 0x02
- /* timer control reg bits */
- #define OMAP_TIMER_CTRL_CAPTMODE (1 << 13)
- #define OMAP_TIMER_CTRL_PT (1 << 12)
- #define OMAP_TIMER_CTRL_TRG_OVERFLOW (0x1 << 10)
- #define OMAP_TIMER_CTRL_TRG_OFANDMATCH (0x2 << 10)
- #define OMAP_TIMER_CTRL_TCM_LOWTOHIGH (0x1 << 8)
- #define OMAP_TIMER_CTRL_TCM_HIGHTOLOW (0x2 << 8)
- #define OMAP_TIMER_CTRL_TCM_BOTHEDGES (0x3 << 8)
- #define OMAP_TIMER_CTRL_SCPWM (1 << 7)
- #define OMAP_TIMER_CTRL_CE (1 << 6) /* compare enable */
- #define OMAP_TIMER_CTRL_PRE (1 << 5) /* prescaler enable */
- #define OMAP_TIMER_CTRL_PTV_SHIFT 2 /* how much to shift the prescaler value */
- #define OMAP_TIMER_CTRL_AR (1 << 1) /* auto-reload enable */
- #define OMAP_TIMER_CTRL_ST (1 << 0) /* start timer */
- /* timer interrupt enable bits */
- #define OMAP_TIMER_INT_CAPTURE (1 << 2)
- #define OMAP_TIMER_INT_OVERFLOW (1 << 1)
- #define OMAP_TIMER_INT_MATCH (1 << 0)
- struct omap_dm_timer {
- struct list_head timer_list;
- u32 base;
- unsigned int irq;
- };
- u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg);
- void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value);
- struct omap_dm_timer * omap_dm_timer_request(void);
- void omap_dm_timer_free(struct omap_dm_timer *timer);
- void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source);
- void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value);
- void omap_dm_timer_set_trigger(struct omap_dm_timer *timer, unsigned int value);
- void omap_dm_timer_enable_compare(struct omap_dm_timer *timer);
- void omap_dm_timer_enable_autoreload(struct omap_dm_timer *timer);
- void omap_dm_timer_trigger(struct omap_dm_timer *timer);
- void omap_dm_timer_start(struct omap_dm_timer *timer);
- void omap_dm_timer_stop(struct omap_dm_timer *timer);
- void omap_dm_timer_set_load(struct omap_dm_timer *timer, unsigned int load);
- void omap_dm_timer_set_match(struct omap_dm_timer *timer, unsigned int match);
- unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer);
- void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value);
- unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer);
- void omap_dm_timer_reset_counter(struct omap_dm_timer *timer);
- int omap_dm_timers_active(void);
- #endif /* __ASM_ARCH_TIMER_H */