cs4236.c

LINUX 2.6.17.4的源码

	/* CTRL initialization */
	if (acard->ctrl && cport[dev] > 0) {
		if (snd_cs423x_pnp_init_ctrl(dev, acard->ctrl, cfg) < 0)
			goto error;
	}
	/* MPU initialization */
	if (acard->mpu && mpu_port[dev] > 0) {
		if (snd_cs423x_pnp_init_mpu(dev, acard->mpu, cfg) < 0)
			goto error;
	}
	kfree(cfg);
	return 0;

 error:
	kfree(cfg);
	return -EBUSY;
}
#endif /* CONFIG_PNP */

#ifdef CONFIG_PNP
#define is_isapnp_selected(dev)		isapnp[dev]
#else
#define is_isapnp_selected(dev)		0
#endif

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

	release_and_free_resource(acard->res_sb_port);
}

static struct snd_card *snd_cs423x_card_new(int dev)
{
	struct snd_card *card;

	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
			    sizeof(struct snd_card_cs4236));
	if (card == NULL)
		return NULL;
	card->private_free = snd_card_cs4236_free;
	return card;
}

static int __devinit snd_cs423x_probe(struct snd_card *card, int dev)
{
	struct snd_card_cs4236 *acard;
	struct snd_pcm *pcm;
	struct snd_cs4231 *chip;
	struct snd_opl3 *opl3;
	int err;

	acard = card->private_data;
	if (sb_port[dev] > 0 && sb_port[dev] != SNDRV_AUTO_PORT)
		if ((acard->res_sb_port = request_region(sb_port[dev], 16, IDENT " SB")) == NULL) {
			printk(KERN_ERR IDENT ": unable to register SB port at 0x%lx\n", sb_port[dev]);
			return -EBUSY;
		}

#ifdef CS4232
	if ((err = snd_cs4231_create(card,
				     port[dev],
				     cport[dev],
				     irq[dev],
				     dma1[dev],
				     dma2[dev],
				     CS4231_HW_DETECT,
				     0,
				     &chip)) < 0)
		return err;
	acard->chip = chip;

	if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0)
		return err;

	if ((err = snd_cs4231_mixer(chip)) < 0)
		return err;

#else /* CS4236 */
	if ((err = snd_cs4236_create(card,
				     port[dev],
				     cport[dev],
				     irq[dev],
				     dma1[dev],
				     dma2[dev],
				     CS4231_HW_DETECT,
				     0,
				     &chip)) < 0)
		return err;
	acard->chip = chip;

	if ((err = snd_cs4236_pcm(chip, 0, &pcm)) < 0)
		return err;

	if ((err = snd_cs4236_mixer(chip)) < 0)
		return err;
#endif
	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,
		irq[dev],
		dma1[dev]);
	if (dma2[dev] >= 0)
		sprintf(card->longname + strlen(card->longname), "&%d", dma2[dev]);

	if ((err = snd_cs4231_timer(chip, 0, NULL)) < 0)
		return err;

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

	if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
		if (mpu_irq[dev] == SNDRV_AUTO_IRQ)
			mpu_irq[dev] = -1;
		if (snd_mpu401_uart_new(card, 0, MPU401_HW_CS4232,
					mpu_port[dev], 0,
					mpu_irq[dev],
					mpu_irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL) < 0)
			printk(KERN_WARNING IDENT ": MPU401 not detected\n");
	}

	return snd_card_register(card);
}

static int __init snd_cs423x_nonpnp_probe(struct platform_device *pdev)
{
	int dev = pdev->id;
	struct snd_card *card;
	int err;

	if (port[dev] == SNDRV_AUTO_PORT) {
		snd_printk(KERN_ERR "specify port\n");
		return -EINVAL;
	}
	if (cport[dev] == SNDRV_AUTO_PORT) {
		snd_printk(KERN_ERR "specify cport\n");
		return -EINVAL;
	}

	card = snd_cs423x_card_new(dev);
	if (! card)
		return -ENOMEM;
	snd_card_set_dev(card, &pdev->dev);
	if ((err = snd_cs423x_probe(card, dev)) < 0) {
		snd_card_free(card);
		return err;
	}

	platform_set_drvdata(pdev, card);
	return 0;
}

static int __devexit snd_cs423x_nonpnp_remove(struct platform_device *devptr)
{
	snd_card_free(platform_get_drvdata(devptr));
	platform_set_drvdata(devptr, NULL);
	return 0;
}

#ifdef CONFIG_PM
static int snd_cs423x_suspend(struct snd_card *card)
{
	struct snd_card_cs4236 *acard = card->private_data;
	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	acard->chip->suspend(acard->chip);
	return 0;
}

static int snd_cs423x_resume(struct snd_card *card)
{
	struct snd_card_cs4236 *acard = card->private_data;
	acard->chip->resume(acard->chip);
	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
}

static int snd_cs423x_nonpnp_suspend(struct platform_device *dev, pm_message_t state)
{
	return snd_cs423x_suspend(platform_get_drvdata(dev));
}

static int snd_cs423x_nonpnp_resume(struct platform_device *dev)
{
	return snd_cs423x_resume(platform_get_drvdata(dev));
}
#endif

static struct platform_driver cs423x_nonpnp_driver = {
	.probe		= snd_cs423x_nonpnp_probe,
	.remove		= __devexit_p(snd_cs423x_nonpnp_remove),
#ifdef CONFIG_PM
	.suspend	= snd_cs423x_nonpnp_suspend,
	.resume		= snd_cs423x_nonpnp_resume,
#endif
	.driver		= {
		.name	= CS423X_DRIVER
	},
};


#ifdef CONFIG_PNP
#ifdef CS4232
static int __devinit snd_cs4232_pnpbios_detect(struct pnp_dev *pdev,
					       const struct pnp_device_id *id)
{
	static int dev;
	int err;
	struct snd_card *card;

	if (pnp_device_is_isapnp(pdev))
		return -ENOENT;	/* we have another procedure - card */
	for (; dev < SNDRV_CARDS; dev++) {
		if (enable[dev] && isapnp[dev])
			break;
	}
	if (dev >= SNDRV_CARDS)
		return -ENODEV;

	card = snd_cs423x_card_new(dev);
	if (! card)
		return -ENOMEM;
	if ((err = snd_card_cs4232_pnp(dev, card->private_data, pdev)) < 0) {
		printk(KERN_ERR "PnP BIOS detection failed for " IDENT "\n");
		snd_card_free(card);
		return err;
	}
	snd_card_set_dev(card, &pdev->dev);
	if ((err = snd_cs423x_probe(card, dev)) < 0) {
		snd_card_free(card);
		return err;
	}
	pnp_set_drvdata(pdev, card);
	dev++;
	snd_cs423x_devices++;
	return 0;
}

static void __devexit snd_cs4232_pnp_remove(struct pnp_dev * pdev)
{
	snd_card_free(pnp_get_drvdata(pdev));
	pnp_set_drvdata(pdev, NULL);
}

#ifdef CONFIG_PM
static int snd_cs4232_pnp_suspend(struct pnp_dev *pdev, pm_message_t state)
{
	return snd_cs423x_suspend(pnp_get_drvdata(pdev));
}

static int snd_cs4232_pnp_resume(struct pnp_dev *pdev)
{
	return snd_cs423x_resume(pnp_get_drvdata(pdev));
}
#endif

static struct pnp_driver cs4232_pnp_driver = {
	.name = "cs4232-pnpbios",
	.id_table = snd_cs4232_pnpbiosids,
	.probe = snd_cs4232_pnpbios_detect,
	.remove = __devexit_p(snd_cs4232_pnp_remove),
#ifdef CONFIG_PM
	.suspend	= snd_cs4232_pnp_suspend,
	.resume		= snd_cs4232_pnp_resume,
#endif
};
#endif /* CS4232 */

static int __devinit snd_cs423x_pnpc_detect(struct pnp_card_link *pcard,
					    const struct pnp_card_device_id *pid)
{
	static int dev;
	struct snd_card *card;
	int res;

	for ( ; dev < SNDRV_CARDS; dev++) {
		if (enable[dev] && isapnp[dev])
			break;
	}
	if (dev >= SNDRV_CARDS)
		return -ENODEV;

	card = snd_cs423x_card_new(dev);
	if (! card)
		return -ENOMEM;
	if ((res = snd_card_cs423x_pnpc(dev, card->private_data, pcard, pid)) < 0) {
		printk(KERN_ERR "isapnp detection failed and probing for " IDENT
		       " is not supported\n");
		snd_card_free(card);
		return res;
	}
	snd_card_set_dev(card, &pcard->card->dev);
	if ((res = snd_cs423x_probe(card, dev)) < 0) {
		snd_card_free(card);
		return res;
	}
	pnp_set_card_drvdata(pcard, card);
	dev++;
	snd_cs423x_devices++;
	return 0;
}

static void __devexit snd_cs423x_pnpc_remove(struct pnp_card_link * pcard)
{
	snd_card_free(pnp_get_card_drvdata(pcard));
	pnp_set_card_drvdata(pcard, NULL);
}

#ifdef CONFIG_PM
static int snd_cs423x_pnpc_suspend(struct pnp_card_link *pcard, pm_message_t state)
{
	return snd_cs423x_suspend(pnp_get_card_drvdata(pcard));
}

static int snd_cs423x_pnpc_resume(struct pnp_card_link *pcard)
{
	return snd_cs423x_resume(pnp_get_card_drvdata(pcard));
}
#endif

static struct pnp_card_driver cs423x_pnpc_driver = {
	.flags = PNP_DRIVER_RES_DISABLE,
	.name = CS423X_ISAPNP_DRIVER,
	.id_table = snd_cs423x_pnpids,
	.probe = snd_cs423x_pnpc_detect,
	.remove = __devexit_p(snd_cs423x_pnpc_remove),
#ifdef CONFIG_PM
	.suspend	= snd_cs423x_pnpc_suspend,
	.resume		= snd_cs423x_pnpc_resume,
#endif
};
#endif /* CONFIG_PNP */

static void __init_or_module snd_cs423x_unregister_all(void)
{
	int i;

#ifdef CONFIG_PNP
	if (pnpc_registered)
		pnp_unregister_card_driver(&cs423x_pnpc_driver);
#ifdef CS4232
	if (pnp_registered)
		pnp_unregister_driver(&cs4232_pnp_driver);
#endif
#endif /* CONFIG_PNP */
	for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
		platform_device_unregister(platform_devices[i]);
	platform_driver_unregister(&cs423x_nonpnp_driver);
}

static int __init alsa_card_cs423x_init(void)
{
	int i, err;

	if ((err = platform_driver_register(&cs423x_nonpnp_driver)) < 0)
		return err;

	for (i = 0; i < SNDRV_CARDS; i++) {
		struct platform_device *device;
		if (! enable[i] || is_isapnp_selected(i))
			continue;
		device = platform_device_register_simple(CS423X_DRIVER,
							 i, NULL, 0);
		if (IS_ERR(device))
			continue;
		if (!platform_get_drvdata(device)) {
			platform_device_unregister(device);
			continue;
		}
		platform_devices[i] = device;
		snd_cs423x_devices++;
	}
#ifdef CONFIG_PNP
#ifdef CS4232
	err = pnp_register_driver(&cs4232_pnp_driver);
	if (!err)
		pnp_registered = 1;
#endif
	err = pnp_register_card_driver(&cs423x_pnpc_driver);
	if (!err)
		pnpc_registered = 1;
#endif /* CONFIG_PNP */

	if (!snd_cs423x_devices) {
#ifdef MODULE
		printk(KERN_ERR IDENT " soundcard not found or device busy\n");
#endif
		snd_cs423x_unregister_all();
		return -ENODEV;
	}
	return 0;
}

static void __exit alsa_card_cs423x_exit(void)
{
	snd_cs423x_unregister_all();
}

module_init(alsa_card_cs423x_init)
module_exit(alsa_card_cs423x_exit)