timer.c

TI OMAP 1510上mcbsp的驱动程序

/*
 * dspapps/dsp/task_testB/timer.c
 *
 * DSP timer module
 *
 * Copyright (C) 2003 Nokia Corporation
 *
 * Written by Toshihiro Kobayashi <[e-mail]>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * $Id: timer.c
 * $Revision: 2.0
 * $Date: 2003/11/11
 *
 */

#include <std.h>
#include <hwi.h>
#include <tsk.h>
#include <mem.h>
#include "omap1510.h"
#include "list.h"
#include "tokliBIOSlib.h"

#define __timer1_start() \
	do {\
		outw(inw(_CNTL_TIMER1) | _CNTL_TIMERn_BIT_ST,\
		     _CNTL_TIMER1);\
	} while(0)
#define __timer1_stop() \
	do {\
		outw(inw(_CNTL_TIMER1) & ~_CNTL_TIMERn_BIT_ST,\
		     _CNTL_TIMER1);\
	} while(0)

#ifndef TQ_USE_MALLOC
static struct procq	tq_1s_pool[TQ_MAX];
#endif
LIST_HEAD(tq_1s);

/*
 * Timer1 is configured in DSP/BIOS configuration,
 * but we want to set it not to be changed by DSP domain clock
 * frequency.
 * Therefore, we need set it up again here.
 */
Void init_timer(Void)
{
	LgUns	ldval;
	
	__timer1_stop();
	// 12MHz for timer clock
	outw(inw(_DSP_CKCTL) & ~_DSP_CKCTL_BIT_TIMXO, _DSP_CKCTL);
//	// enable timer clock
//	outw(inw(_DSP_IDLECT2) | _DSP_IDLECT2_BIT_EN_TIMCK,
//	     _DSP_IDLECT2);

	// Autoload mode, PTV=0
	ldval = 12000000L/2/100; // 1/100 s
	outw(ldval>>16,    _LOAD_TIM_HI1);
	outw(ldval&0xffff, _LOAD_TIM_LO1);
	outw(_CNTL_TIMERn_BIT_AR |
	     _CNTL_TIMERn_BIT_PTV(0) |
	     _CNTL_TIMERn_BIT_CLOCK_ENABLE, _CNTL_TIMER1);
	__timer1_start();
}

Void timer1_start(Void)
{
	__timer1_start();
}

Void timer1_stop(Void)
{
	__timer1_stop();
}

Void init_tq(Void)
{
#ifndef TQ_USE_MALLOC
	Int	i;
	
	for(i=0; i<TQ_MAX; i++) {
		tq_1s_pool[i].tid = MBCMD_TID_FREE;
	}
#endif /* TQ_USE_MALLOC */
}

Void *register_tq_1s(struct dsptask *task,
		     Uns (*f)(struct dsptask *task))
{
	struct procq	*new;
	Uns	intm_saved;

#ifdef TQ_USE_MALLOC
	new = MEM_alloc(MEM->MALLOCSEG, sizeof(struct procq), 2);
	if(new == MEM_ILLEGAL)
		return MEM_ILLEGAL;
	new->func = f;
	new->tid  = task->tid;
	intm_saved = HWI_disable();
	list_add_tail((struct list_head *)new, &tq_1s);
	HWI_restore(intm_saved);
#else /* TQ_USE_MALLOC */
	Int	i;

	intm_saved = HWI_disable();
	for(i=0; i<TQ_MAX; i++) {
		if(tq_1s_pool[i].tid == MBCMD_TID_FREE) {
			new = &tq_1s_pool[i];
			goto add;
		}
	}
	HWI_restore(intm_saved);
	return MEM_ILLEGAL;

add:
	new->func = f;
	new->tid  = task->tid;
	list_add_tail((struct list_head *)new, &tq_1s);
	HWI_restore(intm_saved);
#endif /* TQ_USE_MALLOC */

	return new;
}

Void unregister_tq_1s(struct dsptask *task, Void *id)
{
	struct list_head	*p;
	Uns	intm_saved;

	intm_saved = HWI_disable();
	list_for_each(p, &tq_1s) {
		if(p == id) {
			list_del(p);
			break;
		}
	}
	HWI_restore(intm_saved);

#ifdef TQ_USE_MALLOC
	MEM_free(MEM->MALLOCSEG, id, sizeof(struct procq));
#else
	((struct procq*)id)->tid = MBCMD_TID_FREE;
#endif
}

/*
 * PRD functions
 */
Void prd_10ms(Void)
{
	TSK_yield();
}

Void prd_1s(Void)
{
	struct list_head	*p, *next;
	Uns	eid;
#ifdef DEBUG_WAKEUP_CNT
	LgUns	wakeup_cnt;
#endif /* DEBUG_WAKEUP_CNT */

	/*
	 * Do not use list_for_each().
	 * We must hold p->next before calling func()
	 * in order to allow the queue to suicide
	 * (i.e. call unregister() itself in func().)
	 */
	for(p = tq_1s.next; p != &tq_1s; p = next) {
		struct procq	*pq = (struct procq *)p;
		Uns		tid = pq->tid;

		next = p->next;
		eid = pq->func(dsptask[tid]);
		/*
		 * after func(), we shold not to access p or pq
		 * because it can be deleted!
		 */
		if(eid) {
			sys_cmderr(eid, mbcmd(0,tid));
		}
	}

#ifdef DEBUG_WAKEUP_CNT
	if((wakeup_cnt = get_wakeup_cnt()) > 0) {
		mbsend(mbcmd(MBCMD_ERR, MBCMD_EID_DEBUG), wakeup_cnt>>16);
		mbsend(mbcmd(MBCMD_ERR, MBCMD_EID_DEBUG), wakeup_cnt&0xffff);
		clear_wakeup_cnt();
	}
#endif /* DEBUG_WAKEUP_CNT */
}