include/asm-arm/arch-omap/dmtimer.h

   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
  58 struct omap_dm_timer {
  59         struct list_head timer_list;
  60
  61         u32 base;
  62         unsigned int irq;
  63 };
  64
  65 u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg);
  66 void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value);
  67
  68 struct omap_dm_timer * omap_dm_timer_request(void);
  69 void omap_dm_timer_free(struct omap_dm_timer *timer);
  70 void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source);
  71
  72 void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value);
  73 void omap_dm_timer_set_trigger(struct omap_dm_timer *timer, unsigned int value);
  74 void omap_dm_timer_enable_compare(struct omap_dm_timer *timer);
  75 void omap_dm_timer_enable_autoreload(struct omap_dm_timer *timer);
  76
  77 void omap_dm_timer_trigger(struct omap_dm_timer *timer);
  78 void omap_dm_timer_start(struct omap_dm_timer *timer);
  79 void omap_dm_timer_stop(struct omap_dm_timer *timer);
  80
  81 void omap_dm_timer_set_load(struct omap_dm_timer *timer, unsigned int load);
  82 void omap_dm_timer_set_match(struct omap_dm_timer *timer, unsigned int match);
  83
  84 unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer);
  85 void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value);
  86
  87 unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer);
  88 void omap_dm_timer_reset_counter(struct omap_dm_timer *timer);
  89
  90 int omap_dm_timers_active(void);
  91
  92 #endif /* __ASM_ARCH_TIMER_H */