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/*
module/comedi_rt.h
header file for real-time structures, variables, and constants
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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 program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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 _COMEDI_RT_H
#define _COMEDI_RT_H
#ifndef _COMEDIDEV_H
#error comedi_rt.h should only be included by comedidev.h
#endif
#include <linux/version.h>
#include <linux/kdev_t.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#ifdef CONFIG_COMEDI_RT
#ifdef CONFIG_COMEDI_RTAI
#include <rtai.h>
#include <rtai_sched.h>
#include <rtai_version.h>
#endif
#ifdef CONFIG_COMEDI_RTL
#include <rtl_core.h>
#include <rtl_time.h>
/* #ifdef RTLINUX_VERSION_CODE */
#include <rtl_sync.h>
/* #endif */
#define rt_printk rtl_printf
#endif
#ifdef CONFIG_COMEDI_FUSION
#define rt_printk(format, args...) printk(format , ## args)
#endif /* CONFIG_COMEDI_FUSION */
#ifdef CONFIG_PRIORITY_IRQ
#define rt_printk printk
#endif
int comedi_request_irq(unsigned int irq, irqreturn_t(*handler) (int,
void *PT_REGS_ARG), unsigned long flags, const char *device,
comedi_device *dev_id);
void comedi_free_irq(unsigned int irq, comedi_device *dev_id);
void comedi_rt_init(void);
void comedi_rt_cleanup(void);
int comedi_switch_to_rt(comedi_device *dev);
void comedi_switch_to_non_rt(comedi_device *dev);
void comedi_rt_pend_wakeup(wait_queue_head_t *q);
extern int rt_pend_call(void (*func) (int arg1, void *arg2), int arg1,
void *arg2);
#else
#define comedi_request_irq(a, b, c, d, e) request_irq(a, b, c, d, e)
#define comedi_free_irq(a, b) free_irq(a, b)
#define comedi_rt_init() do {} while (0)
#define comedi_rt_cleanup() do {} while (0)
#define comedi_switch_to_rt(a) (-1)
#define comedi_switch_to_non_rt(a) do {} while (0)
#define comedi_rt_pend_wakeup(a) do {} while (0)
#define rt_printk(format, args...) printk(format, ##args)
#endif
/* Define a spin_lock_irqsave function that will work with rt or without.
* Use inline functions instead of just macros to enforce some type checking.
*/
#define comedi_spin_lock_irqsave(lock_ptr, flags) \
(flags = __comedi_spin_lock_irqsave(lock_ptr))
static inline unsigned long __comedi_spin_lock_irqsave(spinlock_t *lock_ptr)
{
unsigned long flags;
#if defined(CONFIG_COMEDI_RTAI)
flags = rt_spin_lock_irqsave(lock_ptr);
#elif defined(CONFIG_COMEDI_RTL)
rtl_spin_lock_irqsave(lock_ptr, flags);
#elif defined(CONFIG_COMEDI_RTL_V1)
rtl_spin_lock_irqsave(lock_ptr, flags);
#elif defined(CONFIG_COMEDI_FUSION)
rthal_spin_lock_irqsave(lock_ptr, flags);
#else
spin_lock_irqsave(lock_ptr, flags);
#endif
return flags;
}
static inline void comedi_spin_unlock_irqrestore(spinlock_t *lock_ptr,
unsigned long flags)
{
#if defined(CONFIG_COMEDI_RTAI)
rt_spin_unlock_irqrestore(flags, lock_ptr);
#elif defined(CONFIG_COMEDI_RTL)
rtl_spin_unlock_irqrestore(lock_ptr, flags);
#elif defined(CONFIG_COMEDI_RTL_V1)
rtl_spin_unlock_irqrestore(lock_ptr, flags);
#elif defined(CONFIG_COMEDI_FUSION)
rthal_spin_unlock_irqrestore(lock_ptr, flags);
#else
spin_unlock_irqrestore(lock_ptr, flags);
#endif
}
/* define a RT safe udelay */
static inline void comedi_udelay(unsigned int usec)
{
#if defined(CONFIG_COMEDI_RTAI)
static const int nanosec_per_usec = 1000;
rt_busy_sleep(usec * nanosec_per_usec);
#elif defined(CONFIG_COMEDI_RTL)
static const int nanosec_per_usec = 1000;
rtl_delay(usec * nanosec_per_usec);
#else
udelay(usec);
#endif
}
#endif
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