/*
 *  Driver for SoundBlaster 1.0/2.0/Pro soundcards and compatible
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *
 *
 *   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.
 *
 */

#define SND_MAIN_OBJECT_FILE
#include "driver.h"
#include "sb.h"
#include "opl3.h"
#include "initval.h"

int snd_index[SND_CARDS] = SND_DEFAULT_IDX;	/* Index 1-MAX */
char *snd_id[SND_CARDS] = SND_DEFAULT_STR;	/* ID for this card */
int snd_port[SND_CARDS] = SND_DEFAULT_PORT;	/* 0x220,0x240,0x260 */
int snd_irq[SND_CARDS] = SND_DEFAULT_IRQ;	/* 5,7,9,10 */
int snd_dma8[SND_CARDS] = SND_DEFAULT_DMA;	/* 1,3 */
int snd_dma8_size[SND_CARDS] = SND_DEFAULT_DMA_SIZE; /* 8,16,32,64,128 */
#ifdef MODULE_PARM
MODULE_PARM(snd_index, "1-" __MODULE_STRING(SND_CARDS) "i");
MODULE_PARM_DESC(snd_index, "Index value for Sound Blaster soundcard.");
MODULE_PARM(snd_id, "1-" __MODULE_STRING(SND_CARDS) "s");
MODULE_PARM_DESC(snd_id, "ID string for Sound Blaster soundcard.");
MODULE_PARM(snd_port, "1-" __MODULE_STRING(SND_CARDS) "i");
MODULE_PARM_DESC(snd_port, "Port # for SB8 driver.");
MODULE_PARM(snd_irq, "1-" __MODULE_STRING(SND_CARDS) "i");
MODULE_PARM_DESC(snd_irq, "IRQ # for SB8 driver.");
MODULE_PARM(snd_dma8, "1-" __MODULE_STRING(SND_CARDS) "i");
MODULE_PARM_DESC(snd_dma8, "8-bit DMA # for SB8 driver.");
MODULE_PARM(snd_dma8_size, "1-" __MODULE_STRING(SND_CARDS) "i");
MODULE_PARM_DESC(snd_dma8_size, "8-bit DMA size for SB8 driver.");
#endif

static struct snd_sb8 {
	snd_irq_t *irqptr;
	snd_dma_t *dma8ptr;
	snd_card_t *card;
	snd_pcm_t *pcm;
	snd_kmixer_t *mixer;
	snd_rawmidi_t *rmidi;
	snd_synth_t *synth;
} *snd_sb8_cards[SND_CARDS] = SND_DEFAULT_PTR;

static void snd_sb8_use_inc(snd_card_t * card)
{
	MOD_INC_USE_COUNT;
}

static void snd_sb8_use_dec(snd_card_t * card)
{
	MOD_DEC_USE_COUNT;
}

static snd_pcm_t *snd_sb8_detect(snd_card_t * card,
				 unsigned short port,
				 snd_irq_t * irqptr,
				 snd_dma_t * dma8ptr)
{
	snd_pcm_t *pcm;
	snd_pcm1_t *pcm1;
	sbdsp_t *codec;

	if (snd_register_ioport(card, port, 16, "Sound Blaster", NULL) < 0)
		return NULL;
	pcm = snd_sb8dsp_new_device(card, port, irqptr, dma8ptr, SB_HW_10);
	if (!pcm) {
		snd_unregister_ioports(card);
		return NULL;
	}
	pcm1 = (snd_pcm1_t *) pcm->private_data;
	codec = (sbdsp_t *) pcm1->private_data;
	if (codec->hardware >= SB_HW_16) {
		snd_printk("SB 16 soundcard detected at 0x%x, use SB16 driver\n", port);
		snd_pcm_free(pcm);
		snd_unregister_ioports(card);
		return NULL;
	}
	return pcm;
}

static void snd_sb8_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	struct snd_sb8 *acard;
	snd_pcm_t *pcm;
	snd_pcm1_t *pcm1;
	sbdsp_t *codec;

	acard = (struct snd_sb8 *) dev_id;
	if (acard == NULL)
		return;
	pcm = acard->pcm;
	if (pcm == NULL)
		return;
	pcm1 = (snd_pcm1_t *) pcm->private_data;
	if (pcm1 == NULL)
		return;
	codec = (sbdsp_t *) pcm1->private_data;
	if (codec == NULL)
		return;
	if (codec->open8 & SB_OPEN_PCM) {
		snd_sb8dsp_interrupt(pcm);
	} else {
		if (acard->rmidi)
			snd_sb8dsp_midi_interrupt(acard->rmidi);
	}
}

static int snd_sb8_resources(int dev, struct snd_sb8 *acard, snd_card_t * card)
{
	static int possible_irqs[] = {-1};
	static int possible_dmas8[] = {-1};
	int err;

	if ((err = snd_register_interrupt(card,
			"Sound Blaster", snd_irq[dev],
			SND_IRQ_TYPE_ISA, snd_sb8_interrupt,
			acard, possible_irqs, &acard->irqptr)) < 0)
		return err;
	if (snd_dma8[dev] >= 0) {
		if ((err = snd_register_dma_channel(card,
				"Sound Blaster", snd_dma8[dev],
				SND_DMA_TYPE_ISA, snd_dma8_size[dev],
				possible_dmas8, &acard->dma8ptr)) < 0)
			return err;
	} else {
		return -ENOMEM;
	}
	return 0;
}

static int snd_sb8_probe(int dev, struct snd_sb8 *acard)
{
	static int possible_ports[] = {0x220, 0x240, 0x260, -1};
	int *ports = possible_ports;
	sbdsp_t *codec;
	snd_card_t *card;
	snd_pcm_t *pcm = NULL;
	snd_pcm1_t *pcm1;
	snd_kmixer_t *mixer = NULL;
	snd_rawmidi_t *rmidi = NULL;
	snd_synth_t *synth = NULL;
	char *str;

	card = snd_card_new(snd_index[dev], snd_id[dev],
			    snd_sb8_use_inc, snd_sb8_use_dec);
	if (!card)
		return -ENOMEM;
	card->type = SND_CARD_TYPE_SB_10;	/* overriden in probe function */
	if (snd_sb8_resources(dev, acard, card) < 0) {
		snd_card_free(card);
		return -EBUSY;
	}
	pcm = NULL;
	if (snd_port[dev] == SND_AUTO_PORT) {
		for (ports = possible_ports; *ports >= 0; ports++) {
			pcm = snd_sb8_detect(card, *ports, acard->irqptr, acard->dma8ptr);
			if (pcm)
				break;
		}
		if (!pcm) {
			snd_card_free(card);
			return -ENODEV;
		}
	} else {
		pcm = snd_sb8_detect(card, snd_port[dev], acard->irqptr, acard->dma8ptr);
		if (!pcm) {
			snd_card_free(card);
			return -ENODEV;
		}
	}
	pcm1 = (snd_pcm1_t *) pcm->private_data;
	codec = (sbdsp_t *) pcm1->private_data;
	mixer = snd_sb8dsp_new_mixer(card, &codec->mixer, codec->hardware, 0);
	if (mixer) {
		if (snd_mixer_register(mixer, 0) < 0)
			goto __nodev;
	}
	if (codec->hardware == SB_HW_10 || codec->hardware == SB_HW_20) {
		synth = snd_opl3_new_device(card, codec->port + 8,
					    0, OPL3_HW_AUTO, -1);
	} else {
		synth = snd_opl3_new_device(card, codec->port,
					    codec->port + 2, OPL3_HW_AUTO, 0);
	}

	rmidi = snd_sb8dsp_midi_new_device(card, pcm);

	if (synth && snd_synth_register(synth) < 0) {
		if (mixer)
			snd_mixer_unregister(mixer);
		synth = NULL;
		goto __nodev;
	}
	if (rmidi && snd_rawmidi_register(rmidi, 0) < 0) {
		if (synth)
			snd_synth_unregister(synth);
		synth = NULL;
		if (mixer)
			snd_mixer_unregister(mixer);
		mixer = NULL;
		goto __nodev;
	}
	if (snd_pcm_register(pcm, 0) < 0) {
		if (rmidi)
			snd_rawmidi_unregister(rmidi);
		rmidi = NULL;
		if (synth)
			snd_synth_unregister(synth);
		synth = NULL;
		if (mixer)
			snd_mixer_unregister(mixer);
		mixer = NULL;
		goto __nodev;
	}
	strcpy(card->abbreviation, "SB");
	strcpy(card->shortname, codec->name);
	str = card->shortname;
	while (*str && *str != '(')
		str++;
	if (*str == '(' && str != card->shortname)
		*(str - 1) = 0;
	sprintf(card->longname, "%s at 0x%x, irq %i, dma %i",
		codec->name,
		codec->port,
		acard->irqptr->irq,
		acard->dma8ptr->dma);
	if (!snd_card_register(card)) {
		acard->card = card;
		acard->pcm = pcm;
		acard->mixer = mixer;
		acard->rmidi = rmidi;
		acard->synth = synth;
		return 0;
	}
	snd_pcm_unregister(pcm);
	pcm = NULL;
	if (synth)
		snd_synth_unregister(synth);
	synth = NULL;
	if (rmidi)
		snd_rawmidi_unregister(rmidi);
	rmidi = NULL;
	if (mixer)
		snd_mixer_unregister(mixer);
	mixer = NULL;

      __nodev:
	if (synth)
		snd_synth_free(synth);
	if (rmidi)
		snd_rawmidi_free(rmidi);
	if (mixer)
		snd_mixer_free(mixer);
	if (pcm)
		snd_pcm_free(pcm);
	snd_card_free(card);
	return -ENXIO;
}

int init_module(void)
{
	int dev, cards;
	struct snd_sb8 *acard;

#ifndef LINUX_2_1
	register_symtab(NULL);
#endif
	for (dev = cards = 0; dev < SND_CARDS && snd_port[dev] > 0; dev++) {
		acard = (struct snd_sb8 *) snd_malloc(sizeof(struct snd_sb8));
		if (!acard)
			continue;
		memset(acard, 0, sizeof(struct snd_sb8));
		if (snd_sb8_probe(dev, acard) < 0) {
			snd_free(acard, sizeof(struct snd_sb8));
			if (snd_port[dev] == SND_AUTO_PORT)
				break;
			snd_printk("Sound Blaster soundcard #%i not found at 0x%x or device busy\n", dev + 1, snd_port[dev]);
			continue;
		}
		snd_sb8_cards[dev] = acard;
		cards++;
	}
	if (!cards) {
		snd_printk("Sound Blaster soundcard #%i not found or device busy\n", dev + 1);
		return -ENODEV;
	}
	return 0;
}

void cleanup_module(void)
{
	int idx;
	struct snd_sb8 *acard;

	for (idx = 0; idx < SND_CARDS; idx++) {
		acard = snd_sb8_cards[idx];
		if (acard) {
			snd_card_unregister(acard->card);
			if (acard->synth)
				snd_synth_unregister(acard->synth);
			if (acard->rmidi)
				snd_rawmidi_unregister(acard->rmidi);
			if (acard->mixer)
				snd_mixer_unregister(acard->mixer);
			if (acard->pcm) {
				snd_pcm_unregister(acard->pcm);
			}
			snd_card_free(acard->card);
			snd_free(acard, sizeof(struct snd_sb8));
		}
	}
}
