cmi8330.c

linux 内核源代码

 * PCM interface
 *
 * since we call the different chip interfaces for playback and capture
 * directions, we need a trick.
 *
 * - copy the ops for each direction into a local record.
 * - replace the open callback with the new one, which replaces the
 *   substream->private_data with the corresponding chip instance
 *   and calls again the original open callback of the chip.
 *
 */

#ifdef PLAYBACK_ON_SB
#define CMI_SB_STREAM	SNDRV_PCM_STREAM_PLAYBACK
#define CMI_AD_STREAM	SNDRV_PCM_STREAM_CAPTURE
#else
#define CMI_SB_STREAM	SNDRV_PCM_STREAM_CAPTURE
#define CMI_AD_STREAM	SNDRV_PCM_STREAM_PLAYBACK
#endif

static int snd_cmi8330_playback_open(struct snd_pcm_substream *substream)
{
	struct snd_cmi8330 *chip = snd_pcm_substream_chip(substream);

	/* replace the private_data and call the original open callback */
	substream->private_data = chip->streams[SNDRV_PCM_STREAM_PLAYBACK].private_data;
	return chip->streams[SNDRV_PCM_STREAM_PLAYBACK].open(substream);
}

static int snd_cmi8330_capture_open(struct snd_pcm_substream *substream)
{
	struct snd_cmi8330 *chip = snd_pcm_substream_chip(substream);

	/* replace the private_data and call the original open callback */
	substream->private_data = chip->streams[SNDRV_PCM_STREAM_CAPTURE].private_data;
	return chip->streams[SNDRV_PCM_STREAM_CAPTURE].open(substream);
}

static int __devinit snd_cmi8330_pcm(struct snd_card *card, struct snd_cmi8330 *chip)
{
	struct snd_pcm *pcm;
	const struct snd_pcm_ops *ops;
	int err;
	static snd_pcm_open_callback_t cmi_open_callbacks[2] = {
		snd_cmi8330_playback_open,
		snd_cmi8330_capture_open
	};

	if ((err = snd_pcm_new(card, "CMI8330", 0, 1, 1, &pcm)) < 0)
		return err;
	strcpy(pcm->name, "CMI8330");
	pcm->private_data = chip;
	
	/* SB16 */
	ops = snd_sb16dsp_get_pcm_ops(CMI_SB_STREAM);
	chip->streams[CMI_SB_STREAM].ops = *ops;
	chip->streams[CMI_SB_STREAM].open = ops->open;
	chip->streams[CMI_SB_STREAM].ops.open = cmi_open_callbacks[CMI_SB_STREAM];
	chip->streams[CMI_SB_STREAM].private_data = chip->sb;

	/* AD1848 */
	ops = snd_ad1848_get_pcm_ops(CMI_AD_STREAM);
	chip->streams[CMI_AD_STREAM].ops = *ops;
	chip->streams[CMI_AD_STREAM].open = ops->open;
	chip->streams[CMI_AD_STREAM].ops.open = cmi_open_callbacks[CMI_AD_STREAM];
	chip->streams[CMI_AD_STREAM].private_data = chip->wss;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &chip->streams[SNDRV_PCM_STREAM_PLAYBACK].ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &chip->streams[SNDRV_PCM_STREAM_CAPTURE].ops);

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_isa_data(),
					      64*1024, 128*1024);
	chip->pcm = pcm;

	return 0;
}


#ifdef CONFIG_PM
static int snd_cmi8330_suspend(struct snd_card *card)
{
	struct snd_cmi8330 *acard = card->private_data;

	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	snd_pcm_suspend_all(acard->pcm);
	acard->wss->suspend(acard->wss);
	snd_sbmixer_suspend(acard->sb);
	return 0;
}

static int snd_cmi8330_resume(struct snd_card *card)
{
	struct snd_cmi8330 *acard = card->private_data;

	snd_sbdsp_reset(acard->sb);
	snd_sbmixer_suspend(acard->sb);
	acard->wss->resume(acard->wss);
	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
}
#endif


/*
 */

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

#define PFX	"cmi8330: "

static struct snd_card *snd_cmi8330_card_new(int dev)
{
	struct snd_card *card;
	struct snd_cmi8330 *acard;

	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
			    sizeof(struct snd_cmi8330));
	if (card == NULL) {
		snd_printk(KERN_ERR PFX "could not get a new card\n");
		return NULL;
	}
	acard = card->private_data;
	acard->card = card;
	return card;
}

static int __devinit snd_cmi8330_probe(struct snd_card *card, int dev)
{
	struct snd_cmi8330 *acard;
	int i, err;

	acard = card->private_data;
	if ((err = snd_ad1848_create(card,
				     wssport[dev] + 4,
				     wssirq[dev],
				     wssdma[dev],
				     AD1848_HW_DETECT,
				     &acard->wss)) < 0) {
		snd_printk(KERN_ERR PFX "(AD1848) device busy??\n");
		return err;
	}
	if (acard->wss->hardware != AD1848_HW_CMI8330) {
		snd_printk(KERN_ERR PFX "(AD1848) not found during probe\n");
		return -ENODEV;
	}

	if ((err = snd_sbdsp_create(card, sbport[dev],
				    sbirq[dev],
				    snd_sb16dsp_interrupt,
				    sbdma8[dev],
				    sbdma16[dev],
				    SB_HW_AUTO, &acard->sb)) < 0) {
		snd_printk(KERN_ERR PFX "(SB16) device busy??\n");
		return err;
	}
	if (acard->sb->hardware != SB_HW_16) {
		snd_printk(KERN_ERR PFX "(SB16) not found during probe\n");
		return err;
	}

	snd_ad1848_out(acard->wss, AD1848_MISC_INFO, 0x40); /* switch on MODE2 */
	for (i = CMI8330_RMUX3D; i <= CMI8330_CDINGAIN; i++)
		snd_ad1848_out(acard->wss, i, snd_cmi8330_image[i - CMI8330_RMUX3D]);

	if ((err = snd_cmi8330_mixer(card, acard)) < 0) {
		snd_printk(KERN_ERR PFX "failed to create mixers\n");
		return err;
	}

	if ((err = snd_cmi8330_pcm(card, acard)) < 0) {
		snd_printk(KERN_ERR PFX "failed to create pcms\n");
		return err;
	}

	strcpy(card->driver, "CMI8330/C3D");
	strcpy(card->shortname, "C-Media CMI8330/C3D");
	sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
		card->shortname,
		acard->wss->port,
		wssirq[dev],
		wssdma[dev]);

	return snd_card_register(card);
}

static int __devinit snd_cmi8330_isa_match(struct device *pdev,
					   unsigned int dev)
{
	if (!enable[dev] || is_isapnp_selected(dev))
		return 0;
	if (wssport[dev] == SNDRV_AUTO_PORT) {
		snd_printk(KERN_ERR PFX "specify wssport\n");
		return 0;
	}
	if (sbport[dev] == SNDRV_AUTO_PORT) {
		snd_printk(KERN_ERR PFX "specify sbport\n");
		return 0;
	}
	return 1;
}

static int __devinit snd_cmi8330_isa_probe(struct device *pdev,
					   unsigned int dev)
{
	struct snd_card *card;
	int err;

	card = snd_cmi8330_card_new(dev);
	if (! card)
		return -ENOMEM;
	snd_card_set_dev(card, pdev);
	if ((err = snd_cmi8330_probe(card, dev)) < 0) {
		snd_card_free(card);
		return err;
	}
	dev_set_drvdata(pdev, card);
	return 0;
}

static int __devexit snd_cmi8330_isa_remove(struct device *devptr,
					    unsigned int dev)
{
	snd_card_free(dev_get_drvdata(devptr));
	dev_set_drvdata(devptr, NULL);
	return 0;
}

#ifdef CONFIG_PM
static int snd_cmi8330_isa_suspend(struct device *dev, unsigned int n,
				   pm_message_t state)
{
	return snd_cmi8330_suspend(dev_get_drvdata(dev));
}

static int snd_cmi8330_isa_resume(struct device *dev, unsigned int n)
{
	return snd_cmi8330_resume(dev_get_drvdata(dev));
}
#endif

#define DEV_NAME	"cmi8330"

static struct isa_driver snd_cmi8330_driver = {
	.match		= snd_cmi8330_isa_match,
	.probe		= snd_cmi8330_isa_probe,
	.remove		= __devexit_p(snd_cmi8330_isa_remove),
#ifdef CONFIG_PM
	.suspend	= snd_cmi8330_isa_suspend,
	.resume		= snd_cmi8330_isa_resume,
#endif
	.driver		= {
		.name	= DEV_NAME
	},
};


#ifdef CONFIG_PNP
static int __devinit snd_cmi8330_pnp_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_cmi8330_card_new(dev);
	if (! card)
		return -ENOMEM;
	if ((res = snd_cmi8330_pnp(dev, card->private_data, pcard, pid)) < 0) {
		snd_printk(KERN_ERR PFX "PnP detection failed\n");
		snd_card_free(card);
		return res;
	}
	snd_card_set_dev(card, &pcard->card->dev);
	if ((res = snd_cmi8330_probe(card, dev)) < 0) {
		snd_card_free(card);
		return res;
	}
	pnp_set_card_drvdata(pcard, card);
	dev++;
	return 0;
}

static void __devexit snd_cmi8330_pnp_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_cmi8330_pnp_suspend(struct pnp_card_link *pcard, pm_message_t state)
{
	return snd_cmi8330_suspend(pnp_get_card_drvdata(pcard));
}

static int snd_cmi8330_pnp_resume(struct pnp_card_link *pcard)
{
	return snd_cmi8330_resume(pnp_get_card_drvdata(pcard));
}
#endif

static struct pnp_card_driver cmi8330_pnpc_driver = {
	.flags = PNP_DRIVER_RES_DISABLE,
	.name = "cmi8330",
	.id_table = snd_cmi8330_pnpids,
	.probe = snd_cmi8330_pnp_detect,
	.remove = __devexit_p(snd_cmi8330_pnp_remove),
#ifdef CONFIG_PM
	.suspend	= snd_cmi8330_pnp_suspend,
	.resume		= snd_cmi8330_pnp_resume,
#endif
};
#endif /* CONFIG_PNP */

static int __init alsa_card_cmi8330_init(void)
{
	int err;

	err = isa_register_driver(&snd_cmi8330_driver, SNDRV_CARDS);
#ifdef CONFIG_PNP
	if (!err)
		isa_registered = 1;

	err = pnp_register_card_driver(&cmi8330_pnpc_driver);
	if (!err)
		pnp_registered = 1;

	if (isa_registered)
		err = 0;
#endif
	return err;
}

static void __exit alsa_card_cmi8330_exit(void)
{
#ifdef CONFIG_PNP
	if (pnp_registered)
		pnp_unregister_card_driver(&cmi8330_pnpc_driver);

	if (isa_registered)
#endif
		isa_unregister_driver(&snd_cmi8330_driver);
}

module_init(alsa_card_cmi8330_init)
module_exit(alsa_card_cmi8330_exit)