task_test2.c

TI OMAP 1510上mcbsp的驱动程序

/*
 * dspapps/dsp/task_testB/task_test2.c
 *
 * DSP task example: block send / block receive
 *
 * Copyright (C) 2002,2003 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: task_test2.c
 * $Revision: 2.0
 * $Date: 2003/11/11
 *
 */
#include <std.h>
#include "mailbox.h"
#include "tokliBIOS.h"

static Uns	t2_rcv_bksnd(struct dsptask *task, Uns bid, Uns cnt);
static Uns	t2_rcv_bkreq(struct dsptask *task, Uns cnt);

struct task_t2 {
	struct dsptask	task_head;
	Uns	bkdata[128];
};

struct task_t2 task_test2 = {
	{
		TID_MAGIC,	// tid
		"test2",	// name
		MBCMD_TTYP_BKDM | MBCMD_TTYP_BKMD,
				// ttyp: passive block snd, passive block rcv
		t2_rcv_bksnd,	// rcv_snd
		t2_rcv_bkreq,	// rcv_req
		NULL,		// rcv_tctl
		NULL		// tsk_attrs
	},
};

static Uns t2_rcv_bksnd(struct dsptask *task, Uns bid, Uns cnt)
{
	struct task_t2	*task_t2 = (struct task_t2*)task;

	memcpy(task_t2->bkdata, ipbuf_d[bid], cnt);
	unuse_ipbuf(task, bid);

	return 0;
}

static Uns t2_rcv_bkreq(struct dsptask *task, Uns cnt)
{
	struct task_t2	*task_t2 = (struct task_t2*)task;
	Uns	bid;

	bid = get_free_ipbuf(task);
	if(bid == MBCMD_BID_NULL)
		return MBCMD_EID_STVBUF;
	memcpy(ipbuf_d[bid], task_t2->bkdata, cnt);
	bksnd(task, bid, cnt);

	return 0;
}