interwave.c

是关于linux2.5.1的完全源码

static void snd_interwave_free(snd_card_t *card)
{
	struct snd_interwave *iwcard = (struct snd_interwave *)card->private_data;

	if (iwcard == NULL)
		return;
#ifdef __ISAPNP__
	snd_interwave_deactivate(iwcard);
#endif
#ifdef SNDRV_STB
	if (iwcard->i2c_res) {
		release_resource(iwcard->i2c_res);
		kfree_nocheck(iwcard->i2c_res);
	}
#endif
	if (iwcard->irq >= 0)
		free_irq(iwcard->irq, (void *)iwcard);
}

static int __init snd_interwave_probe(int dev)
{
	static int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, -1};
	static int possible_dmas[] = {0, 1, 3, 5, 6, 7, -1};
	int irq, dma1, dma2;
	snd_card_t *card;
	struct snd_interwave *iwcard;
	cs4231_t *cs4231;
	snd_gus_card_t *gus;
#ifdef SNDRV_STB
	snd_i2c_bus_t *i2c_bus;
#endif
	snd_pcm_t *pcm;
	char *str;
	int err;

	card = snd_card_new(snd_index[dev], snd_id[dev], THIS_MODULE,
			    sizeof(struct snd_interwave));
	if (card == NULL)
		return -ENOMEM;
	iwcard = (struct snd_interwave *)card->private_data;
	iwcard->card = card;
	iwcard->irq = -1;
	card->private_free = snd_interwave_free;
#ifdef __ISAPNP__
	if (snd_isapnp[dev] && snd_interwave_isapnp(dev, iwcard)) {
		snd_card_free(card);
		return -ENODEV;
	}
#endif
	irq = snd_irq[dev];
	if (irq == SNDRV_AUTO_IRQ) {
		if ((irq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
			snd_card_free(card);
			snd_printk("unable to find a free IRQ\n");
			return -EBUSY;
		}
	}
	dma1 = snd_dma1[dev];
	if (dma1 == SNDRV_AUTO_DMA) {
		if ((dma1 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
			snd_card_free(card);
			snd_printk("unable to find a free DMA1\n");
			return -EBUSY;
		}
	}
	dma2 = snd_dma2[dev];
	if (dma2 == SNDRV_AUTO_DMA) {
		if ((dma2 = snd_legacy_find_free_dma(possible_dmas)) < 0) {
			snd_card_free(card);
			snd_printk("unable to find a free DMA2\n");
			return -EBUSY;
		}
	}

	if ((err = snd_gus_create(card,
				  snd_port[dev],
				  -irq, dma1, dma2,
				  0, 32,
				  snd_pcm_channels[dev], snd_effect[dev], &gus)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_interwave_detect(iwcard, gus, dev
#ifdef SNDRV_STB
            , &i2c_bus
#endif
	    )) < 0) {
		snd_card_free(card);
		return err;
	}
	iwcard->gus_status_reg = gus->gf1.reg_irqstat;
	iwcard->pcm_status_reg = gus->gf1.port + 0x10c + 2;

	snd_interwave_init(dev, gus);
	snd_interwave_detect_memory(gus);
	if ((err = snd_gus_initialize(gus)) < 0) {
		snd_card_free(card);
		return err;
	}

	if (request_irq(irq, snd_interwave_interrupt, SA_INTERRUPT, "InterWave", (void *)iwcard)) {
		snd_card_free(card);
		snd_printk("unable to grab IRQ %d\n", irq);
		return -EBUSY;
	}
	iwcard->irq = irq;

	if ((err = snd_cs4231_create(card,
				     gus->gf1.port + 0x10c, -1, irq,
				     dma2 < 0 ? dma1 : dma2, dma1,
				     CS4231_HW_INTERWAVE,
				     CS4231_HWSHARE_IRQ |
				     CS4231_HWSHARE_DMA1 |
				     CS4231_HWSHARE_DMA2,
				     &cs4231)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_cs4231_pcm(cs4231, 0, &pcm)) < 0) {
		snd_card_free(card);
		return err;
	}
	sprintf(pcm->name + strlen(pcm->name), " rev %c", gus->revision + 'A');
	strcat(pcm->name, " (chip)");
	if ((err = snd_cs4231_timer(cs4231, 2, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_cs4231_mixer(cs4231)) < 0) {
		snd_card_free(card);
		return err;
	}
	if (snd_pcm_channels[dev] > 0) {
		if ((err = snd_gf1_pcm_new(gus, 1, 1, NULL)) < 0) {
			snd_card_free(card);
			return err;
		}
	}
	if ((err = snd_interwave_mixer(cs4231)) < 0) {
		snd_card_free(card);
		return err;
	}
#ifdef SNDRV_STB
	{
		snd_ctl_elem_id_t id1, id2;
		memset(&id1, 0, sizeof(id1));
		memset(&id2, 0, sizeof(id2));
		id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
		strcpy(id1.name, "Master Playback Switch");
		strcpy(id2.name, id1.name);
		id2.index = 1;
		if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0) {
			snd_card_free(card);
			return err;
		}
		strcpy(id1.name, "Master Playback Volume");
		strcpy(id2.name, id1.name);
		if ((err = snd_ctl_rename_id(card, &id1, &id2)) < 0) {
			snd_card_free(card);
			return err;
		}
		if ((err = snd_tea6330t_update_mixer(card, i2c_bus, 0, 1)) < 0) {
			snd_card_free(card);
			return err;
		}
	}
#endif

	gus->uart_enable = snd_midi[dev];
	if ((err = snd_gf1_rawmidi_new(gus, 0, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}

#ifndef SNDRV_STB
	str = "AMD InterWave";
	if (gus->gf1.rom_banks == 1 && gus->gf1.rom_present == 8)
		str = "Dynasonic 3-D";
#else
	str = "InterWave STB";
#endif
	strcpy(card->driver, str);
	strcpy(card->shortname, str);
	sprintf(card->longname, "%s at 0x%lx, irq %i, dma %d",
		str,
		gus->gf1.port,
		irq,
		dma1);
	if (dma2 >= 0)
		sprintf(card->longname + strlen(card->longname), "&%d", dma2);

	if ((err = snd_card_register(card)) < 0) {
		snd_card_free(card);
		return err;
	}
	
	iwcard->cs4231 = cs4231;
	iwcard->gus = gus;
	snd_interwave_cards[dev++] = card;
	return 0;
}

static int __init snd_interwave_probe_legacy_port(unsigned long port)
{
	static int dev;
	int res;

	for ( ; dev < SNDRV_CARDS; dev++) {
		if (!snd_enable[dev] || snd_port[dev] != SNDRV_AUTO_PORT)
                        continue;
#ifdef __ISAPNP__
		if (snd_isapnp[dev])
			continue;
#endif
		snd_port[dev] = port;
		res = snd_interwave_probe(dev);
		if (res < 0)
			snd_port[dev] = SNDRV_AUTO_PORT;
		return res;
	}
	return -ENODEV;
}

#ifdef __ISAPNP__

static int __init snd_interwave_isapnp_detect(struct isapnp_card *card,
					      const struct isapnp_card_id *id)
{
	static int dev;
	int res;

	for ( ; dev < SNDRV_CARDS; dev++) {
		if (!snd_enable[dev] || !snd_isapnp[dev])
			continue;
		snd_interwave_isapnp_cards[dev] = card;
		snd_interwave_isapnp_id[dev] = id;
		res = snd_interwave_probe(dev);
		if (res < 0)
			return res;
		dev++;
		return 0;
        }

        return -ENODEV;
}

#endif /* __ISAPNP__ */

static int __init alsa_card_interwave_init(void)
{
	int cards = 0;
	static long possible_ports[] = {0x210, 0x220, 0x230, 0x240, 0x250, 0x260, -1};
	int dev;

	for (dev = 0; dev < SNDRV_CARDS; dev++) {
		if (!snd_enable[dev] || snd_port[dev] == SNDRV_AUTO_PORT)
			continue;
#ifdef __ISAPNP__
		if (snd_isapnp[dev])
			continue;
#endif
		if (!snd_interwave_probe(dev)) {
			cards++;
			continue;
		}
#ifdef MODULE
		printk(KERN_ERR "InterWave soundcard #%i not found at 0x%lx or device busy\n", dev, snd_port[dev]);
#endif
	}
	/* legacy auto configured cards */
	cards += snd_legacy_auto_probe(possible_ports, snd_interwave_probe_legacy_port);
#ifdef __ISAPNP__
        /* ISA PnP cards */
        cards += isapnp_probe_cards(snd_interwave_pnpids, snd_interwave_isapnp_detect);
#endif

	if (!cards) {
#ifdef MODULE
		printk(KERN_ERR "InterWave soundcard not found or device busy\n");
#endif
		return -ENODEV;
	}
	return 0;
}

static void __exit alsa_card_interwave_exit(void)
{
	int dev;

	for (dev = 0; dev < SNDRV_CARDS; dev++)
		snd_card_free(snd_interwave_cards[dev]);
}

module_init(alsa_card_interwave_init)
module_exit(alsa_card_interwave_exit)

#ifndef MODULE

/* format is: snd-interwave=snd_enable,snd_index,snd_id,snd_isapnp,
			    snd_port[,snd_port_tc],snd_irq,
			    snd_dma1,snd_dma2,
			    snd_joystick_dac,snd_midi,
			    snd_pcm_channels,snd_effect */

static int __init alsa_card_interwave_setup(char *str)
{
	static unsigned __initdata nr_dev = 0;
	int __attribute__ ((__unused__)) pnp = INT_MAX;

	if (nr_dev >= SNDRV_CARDS)
		return 0;
	(void)(get_option(&str,&snd_enable[nr_dev]) == 2 &&
	       get_option(&str,&snd_index[nr_dev]) == 2 &&
	       get_id(&str,&snd_id[nr_dev]) == 2 &&
	       get_option(&str,&pnp) == 2 &&
	       get_option(&str,(int *)&snd_port[nr_dev]) == 2 &&
#ifdef SNDRV_STB
	       get_option(&str,(int *)&snd_port_tc[nr_dev]) == 2 &&
#endif
	       get_option(&str,&snd_irq[nr_dev]) == 2 &&
	       get_option(&str,&snd_dma1[nr_dev]) == 2 &&
	       get_option(&str,&snd_dma2[nr_dev]) == 2 &&
	       get_option(&str,&snd_joystick_dac[nr_dev]) == 2 &&
	       get_option(&str,&snd_midi[nr_dev]) == 2 &&
	       get_option(&str,&snd_pcm_channels[nr_dev]) == 2 &&
	       get_option(&str,&snd_effect[nr_dev]) == 2);
#ifdef __ISAPNP__
	if (pnp != INT_MAX)
		snd_isapnp[nr_dev] = pnp;
#endif
	nr_dev++;
	return 1;
}

#ifndef SNDRV_STB
__setup("snd-interwave=", alsa_card_interwave_setup);
#else
__setup("snd-interwave-stb=", alsa_card_interwave_setup);
#endif

#endif /* ifndef MODULE */