path: root/sound/isa/msnd/msnd_pinnacle.c

/*********************************************************************
 *
 * Linux multisound pinnacle/fiji driver for ALSA.
 *
 * 2002/06/30 Karsten Wiese:
 *	for now this is only used to build a pinnacle / fiji driver.
 *	the OSS parent of this code is designed to also support
 *	the multisound classic via the file msnd_classic.c.
 *	to make it easier for some brave heart to implemt classic
 *	support in alsa, i left all the MSND_CLASSIC tokens in this file.
 *	but for now this untested & undone.
 *
 *
 * ripped from linux kernel 2.4.18 by Karsten Wiese.
 *
 * the following is a copy of the 2.4.18 OSS FREE file-heading comment:
 *
 * Turtle Beach MultiSound Sound Card Driver for Linux
 * msnd_pinnacle.c / msnd_classic.c
 *
 * -- If MSND_CLASSIC is defined:
 *
 *     -> driver for Turtle Beach Classic/Monterey/Tahiti
 *
 * -- Else
 *
 *     -> driver for Turtle Beach Pinnacle/Fiji
 *
 * 12-3-2000  Modified IO port validation  Steve Sycamore
 *
 * Copyright (C) 1998 Andrew Veliath
 *
 * 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.
 *
 ********************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/firmware.h>
#include <linux/isa.h>
#include <linux/isapnp.h>
#include <linux/irq.h>
#include <linux/io.h>

#include <sound/core.h>
#include <sound/initval.h>
#include <sound/asound.h>
#include <sound/pcm.h>
#include <sound/mpu401.h>

#ifdef MSND_CLASSIC
# ifndef __alpha__
#  define SLOWIO
# endif
#endif
#include "msnd.h"
#ifdef MSND_CLASSIC
#  include "msnd_classic.h"
#  define LOGNAME			"msnd_classic"
#else
#  include "msnd_pinnacle.h"
#  define LOGNAME			"snd_msnd_pinnacle"
#endif

static void __devinit set_default_audio_parameters(struct snd_msnd *chip)
{
	chip->play_sample_size = DEFSAMPLESIZE;
	chip->play_sample_rate = DEFSAMPLERATE;
	chip->play_channels = DEFCHANNELS;
	chip->capture_sample_size = DEFSAMPLESIZE;
	chip->capture_sample_rate = DEFSAMPLERATE;
	chip->capture_channels = DEFCHANNELS;
}

static void snd_msnd_eval_dsp_msg(struct snd_msnd *chip, u16 wMessage)
{
	switch (HIBYTE(wMessage)) {
	case HIMT_PLAY_DONE: {
		if (chip->banksPlayed < 3)
			snd_printdd("%08X: HIMT_PLAY_DONE: %i\n",
				(unsigned)jiffies, LOBYTE(wMessage));

		if (chip->last_playbank == LOBYTE(wMessage)) {
			snd_printdd("chip.last_playbank == LOBYTE(wMessage)\n");
			break;
		}
		chip->banksPlayed++;

		if (test_bit(F_WRITING, &chip->flags))
			snd_msnd_DAPQ(chip, 0);

		chip->last_playbank = LOBYTE(wMessage);
		chip->playDMAPos += chip->play_period_bytes;
		if (chip->playDMAPos > chip->playLimit)
			chip->playDMAPos = 0;
		snd_pcm_period_elapsed(chip->playback_substream);

		break;
	}
	case HIMT_RECORD_DONE:
		if (chip->last_recbank == LOBYTE(wMessage))
			break;
		chip->last_recbank = LOBYTE(wMessage);
		chip->captureDMAPos += chip->capturePeriodBytes;
		if (chip->captureDMAPos > (chip->captureLimit))
			chip->captureDMAPos = 0;