cs4236.c

是关于linux2.5.1的完全源码

			snd_port[dev], snd_fm_port[dev], snd_sb_port[dev]);
	snd_printdd("isapnp WSS: irq=%i, dma1=%i, dma2=%i\n",
			snd_irq[dev], snd_dma1[dev], snd_dma2[dev]);
	/* CTRL initialization */
	pdev = acard->ctrl;
	if (pdev->prepare(pdev) < 0) {
		acard->wss->deactivate(acard->wss);
		return -EAGAIN;
	}
	if (snd_cport[dev] != SNDRV_AUTO_PORT)
		isapnp_resource_change(&pdev->resource[0], snd_cport[dev], 8);
	if (pdev->activate(pdev)<0) {
		printk(KERN_ERR IDENT " isapnp configure failed for control (out of resources?)\n");
		acard->wss->deactivate(acard->wss);
		return -EBUSY;
	}
	snd_cport[dev] = pdev->resource[0].start;
	snd_printdd("isapnp CTRL: control port=0x%lx\n", snd_cport[dev]);
	/* MPU initialization */
	if (acard->mpu) {
		pdev = acard->mpu;
		if (pdev->prepare(pdev) < 0) {
			acard->wss->deactivate(acard->wss);
			acard->ctrl->deactivate(acard->ctrl);
			return -EAGAIN;
		}
		if (snd_mpu_port[dev] != SNDRV_AUTO_PORT)
			isapnp_resource_change(&pdev->resource[0], snd_mpu_port[dev], 2);
		if (snd_mpu_irq[dev] != SNDRV_AUTO_IRQ)
			isapnp_resource_change(&pdev->irq_resource[0], snd_mpu_irq[dev], 1);
		if (pdev->activate(pdev)<0) {
			snd_mpu_port[dev] = SNDRV_AUTO_PORT;
			snd_mpu_irq[dev] = SNDRV_AUTO_IRQ;
			printk(KERN_ERR IDENT " isapnp configure failed for MPU (out of resources?)\n");
		} else {
			snd_mpu_port[dev] = pdev->resource[0].start;
			if (pdev->irq_resource[0].flags & IORESOURCE_IRQ) {
				snd_mpu_irq[dev] = pdev->irq_resource[0].start;
			} else {
				snd_mpu_irq[dev] = -1;	/* disable interrupt */
			}
		}
		snd_printdd("isapnp MPU: port=0x%lx, irq=%i\n", snd_mpu_port[dev], snd_mpu_irq[dev]);
	}
	return 0;
}

static void snd_card_cs4236_deactivate(struct snd_card_cs4236 *acard)
{
	if (acard->wss) {
		acard->wss->deactivate(acard->wss);
		acard->wss = NULL;
	}
	if (acard->ctrl) {
		acard->ctrl->deactivate(acard->ctrl);
		acard->ctrl = NULL;
	}
	if (acard->mpu) {
		acard->mpu->deactivate(acard->mpu);
		acard->mpu = NULL;
	}
}
#endif

static void snd_card_cs4236_free(snd_card_t *card)
{
	struct snd_card_cs4236 *acard = (struct snd_card_cs4236 *)card->private_data;

	if (acard) {
#ifdef __ISAPNP__
		snd_card_cs4236_deactivate(acard);
#endif
		if (acard->res_sb_port) {
			release_resource(acard->res_sb_port);
			kfree_nocheck(acard->res_sb_port);
		}
	}
}

static int __init snd_card_cs4236_probe(int dev)
{
	snd_card_t *card;
	struct snd_card_cs4236 *acard;
	snd_pcm_t *pcm = NULL;
	cs4231_t *chip;
	opl3_t *opl3;
	int err;

#ifdef __ISAPNP__
	if (!snd_isapnp[dev]) {
#endif
		if (snd_port[dev] == SNDRV_AUTO_PORT) {
			snd_printk("specify snd_port\n");
			return -EINVAL;
		}
		if (snd_cport[dev] == SNDRV_AUTO_PORT) {
			snd_printk("specify snd_cport\n");
			return -EINVAL;
		}
#ifdef __ISAPNP__
	}
#endif
	card = snd_card_new(snd_index[dev], snd_id[dev], THIS_MODULE,
			    sizeof(struct snd_card_cs4236));
	if (card == NULL)
		return -ENOMEM;
	acard = (struct snd_card_cs4236 *)card->private_data;
	card->private_free = snd_card_cs4236_free;
#ifdef __ISAPNP__
	if (snd_isapnp[dev] && (err = snd_card_cs4236_isapnp(dev, acard))<0) {
		printk(KERN_ERR "isapnp detection failed and probing for " IDENT " is not supported\n");
		snd_card_free(card);
		return -ENXIO;
	}
#endif
	if (snd_mpu_port[dev] < 0)
		snd_mpu_port[dev] = SNDRV_AUTO_PORT;
	if (snd_fm_port[dev] < 0)
		snd_fm_port[dev] = SNDRV_AUTO_PORT;
	if (snd_sb_port[dev] < 0)
		snd_sb_port[dev] = SNDRV_AUTO_PORT;
	if (snd_sb_port[dev] != SNDRV_AUTO_PORT)
		if ((acard->res_sb_port = request_region(snd_sb_port[dev], 16, IDENT " SB")) == NULL) {
			printk(KERN_ERR IDENT ": unable to register SB port at 0x%lx\n", snd_sb_port[dev]);
			snd_card_free(card);
			return -ENOMEM;
		}

#ifdef CS4232
	if ((err = snd_cs4231_create(card,
				     snd_port[dev],
				     snd_cport[dev],
				     snd_irq[dev],
				     snd_dma1[dev],
				     snd_dma2[dev],
				     CS4231_HW_DETECT,
				     0,
				     &chip)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_cs4231_mixer(chip)) < 0) {
		snd_card_free(card);
		return err;
	}

#else /* CS4236 */
	if ((err = snd_cs4236_create(card,
				     snd_port[dev],
				     snd_cport[dev],
				     snd_irq[dev],
				     snd_dma1[dev],
				     snd_dma2[dev],
				     CS4231_HW_DETECT,
				     0,
				     &chip)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_cs4236_pcm(chip, 0, &pcm)) < 0) {
		snd_card_free(card);
		return err;
	}
	if ((err = snd_cs4236_mixer(chip)) < 0) {
		snd_card_free(card);
		return err;
	}
#endif

	if ((err = snd_cs4231_timer(chip, 0, NULL)) < 0) {
		snd_card_free(card);
		return err;
	}

	if (snd_fm_port[dev] != SNDRV_AUTO_PORT) {
		if (snd_opl3_create(card,
				    snd_fm_port[dev], snd_fm_port[dev] + 2,
				    OPL3_HW_OPL3_CS, 0, &opl3) < 0) {
			printk(KERN_ERR IDENT ": OPL3 not detected\n");
		} else {
			if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
				snd_card_free(card);
				return err;
			}
		}
	}

	if (snd_mpu_irq[dev] >= 0 && snd_mpu_irq[dev] != SNDRV_AUTO_IRQ) {
		if (snd_mpu401_uart_new(card, 0, MPU401_HW_CS4232,
					snd_mpu_port[dev], 0,
					snd_mpu_irq[dev],
					snd_mpu_irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL) < 0)
			printk(KERN_ERR IDENT ": MPU401 not detected\n");
	}
	strcpy(card->driver, pcm->name);
	strcpy(card->shortname, pcm->name);
	sprintf(card->longname, "%s at 0x%lx, irq %i, dma %i",
		pcm->name,
		chip->port,
		snd_irq[dev],
		snd_dma1[dev]);
	if (snd_dma1[dev] >= 0)
		sprintf(card->longname + strlen(card->longname), "&%d", snd_dma2[dev]);
	if ((err = snd_card_register(card)) < 0) {
		snd_card_free(card);
		return err;
	}
	snd_cs4236_cards[dev] = card;
	return 0;
}

#ifdef __ISAPNP__
static int __init snd_cs4236_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])
			continue;
		snd_cs4236_isapnp_cards[dev] = card;
		snd_cs4236_isapnp_id[dev] = id;
		res = snd_card_cs4236_probe(dev);
		if (res < 0)
			return res;
		dev++;
		return 0;
	}
	return -ENODEV;
}
#endif /* __ISAPNP__ */

static int __init alsa_card_cs423x_init(void)
{
	int dev, cards = 0;

	for (dev = 0; dev < SNDRV_CARDS; dev++) {
		if (!snd_enable[dev])
			continue;
#ifdef __ISAPNP__
		if (snd_isapnp[dev])
			continue;
#endif
		if (snd_card_cs4236_probe(dev) >= 0)
			cards++;
	}
#ifdef __ISAPNP__
	cards += isapnp_probe_cards(snd_card_pnpids, snd_cs4236_isapnp_detect);
#endif
	if (!cards) {
#ifdef MODULE
		printk(KERN_ERR IDENT " soundcard not found or device busy\n");
#endif
		return -ENODEV;
	}
	return 0;
}

static void __exit alsa_card_cs423x_exit(void)
{
	int idx;

	for (idx = 0; idx < SNDRV_CARDS; idx++)
		snd_card_free(snd_cs4236_cards[idx]);
}

module_init(alsa_card_cs423x_init)
module_exit(alsa_card_cs423x_exit)

#ifndef MODULE

/* format is: snd-cs4232=snd_enable,snd_index,snd_id,snd_isapnp,snd_port,
			 snd_cport,snd_mpu_port,snd_fm_port,snd_sb_port,
			 snd_irq,snd_mpu_irq,snd_dma1,snd_dma1_size,
			 snd_dma2,snd_dma2_size */
/* format is: snd-cs4236=snd_enable,snd_index,snd_id,snd_isapnp,snd_port,
			 snd_cport,snd_mpu_port,snd_fm_port,snd_sb_port,
			 snd_irq,snd_mpu_irq,snd_dma1,snd_dma1_size,
			 snd_dma2,snd_dma2_size */

static int __init alsa_card_cs423x_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 &&
	       get_option(&str,(int *)&snd_cport[nr_dev]) == 2 &&
	       get_option(&str,(int *)&snd_mpu_port[nr_dev]) == 2 &&
	       get_option(&str,(int *)&snd_fm_port[nr_dev]) == 2 &&
	       get_option(&str,(int *)&snd_sb_port[nr_dev]) == 2 &&
	       get_option(&str,&snd_irq[nr_dev]) == 2 &&
	       get_option(&str,&snd_mpu_irq[nr_dev]) == 2 &&
	       get_option(&str,&snd_dma1[nr_dev]) == 2 &&
	       get_option(&str,&snd_dma2[nr_dev]) == 2);
#ifdef __ISAPNP__
	if (pnp != INT_MAX)
		snd_isapnp[nr_dev] = pnp;
#endif
	nr_dev++;
	return 1;
}

#ifdef CS4232
__setup("snd-cs4232=", alsa_card_cs423x_setup);
#else /* CS4236 */
__setup("snd-cs4236=", alsa_card_cs423x_setup);
#endif

#endif /* ifndef MODULE */