cmi8330.c

Linux Kernel 2.6.9 for OMAP1710

	wssdma[dev] = pnp_dma(pdev, 0);
	wssirq[dev] = pnp_irq(pdev, 0);

	/* allocate SB16 resources */
	pdev = acard->play;
	pnp_init_resource_table(cfg);
	if (sbport[dev] != SNDRV_AUTO_PORT)
		pnp_resource_change(&cfg->port_resource[0], sbport[dev], 16);
	if (sbdma8[dev] != SNDRV_AUTO_DMA)
		pnp_resource_change(&cfg->dma_resource[0], sbdma8[dev], 1);
	if (sbdma16[dev] != SNDRV_AUTO_DMA)
		pnp_resource_change(&cfg->dma_resource[1], sbdma16[dev], 1);
	if (sbirq[dev] != SNDRV_AUTO_IRQ)
		pnp_resource_change(&cfg->irq_resource[0], sbirq[dev], 1);

	err = pnp_manual_config_dev(pdev, cfg, 0);
	if (err < 0)
		snd_printk(KERN_ERR "CMI8330/C3D (SB16) PnP manual resources are invalid, using auto config\n");
	err = pnp_activate_dev(pdev);
	if (err < 0) {
		snd_printk(KERN_ERR "CMI8330/C3D (SB16) PnP configure failure\n");
		kfree(cfg);
		return -EBUSY;
	}
	sbport[dev] = pnp_port_start(pdev, 0);
	sbdma8[dev] = pnp_dma(pdev, 0);
	sbdma16[dev] = pnp_dma(pdev, 1);
	sbirq[dev] = pnp_irq(pdev, 0);

	kfree(cfg);
	return 0;
}
#endif

/*
 * 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(snd_pcm_substream_t * 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(snd_pcm_substream_t * 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 void snd_cmi8330_pcm_free(snd_pcm_t *pcm)
{
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static int __devinit snd_cmi8330_pcm(snd_card_t *card, struct snd_cmi8330 *chip)
{
	snd_pcm_t *pcm;
	const snd_pcm_ops_t *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;
	pcm->private_free = snd_cmi8330_pcm_free;
	
	/* 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;
}


/*
 */

static int __devinit snd_cmi8330_probe(int dev,
				       struct pnp_card_link *pcard,
				       const struct pnp_card_device_id *pid)
{
	snd_card_t *card;
	struct snd_cmi8330 *acard;
	unsigned long flags;
	int i, err;

#ifdef CONFIG_PNP
	if (!isapnp[dev]) {
#endif
		if (wssport[dev] == SNDRV_AUTO_PORT) {
			snd_printk("specify wssport\n");
			return -EINVAL;
		}
		if (sbport[dev] == SNDRV_AUTO_PORT) {
			snd_printk("specify sbport\n");
			return -EINVAL;
		}
#ifdef CONFIG_PNP
	}
#endif
	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
			    sizeof(struct snd_cmi8330));
	if (card == NULL) {
		snd_printk("could not get a new card\n");
		return -ENOMEM;
	}
	acard = (struct snd_cmi8330 *)card->private_data;
	acard->card = card;

#ifdef CONFIG_PNP
	if (isapnp[dev]) {
		if ((err = snd_cmi8330_pnp(dev, acard, pcard, pid)) < 0) {
			snd_printk("PnP detection failed\n");
			snd_card_free(card);
			return err;
		}
		snd_card_set_dev(card, &pcard->card->dev);
	}
#endif

	if ((err = snd_ad1848_create(card,
				     wssport[dev] + 4,
				     wssirq[dev],
				     wssdma[dev],
				     AD1848_HW_DETECT,
				     &acard->wss)) < 0) {
		snd_printk("(AD1848) device busy??\n");
		snd_card_free(card);
		return err;
	}
	if (acard->wss->hardware != AD1848_HW_CMI8330) {
		snd_printk("(AD1848) not found during probe\n");
		snd_card_free(card);
		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("(SB16) device busy??\n");
		snd_card_free(card);
		return err;
	}
	if (acard->sb->hardware != SB_HW_16) {
		snd_printk("(SB16) not found during probe\n");
		snd_card_free(card);
		return -ENODEV;
	}

	spin_lock_irqsave(&acard->wss->reg_lock, flags);
	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]);
	spin_unlock_irqrestore(&acard->wss->reg_lock, flags);

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

	if ((err = snd_cmi8330_pcm(card, acard)) < 0) {
		snd_printk("failed to create pcms\n");
		snd_card_free(card);
		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]);

	if ((err = snd_card_register(card)) < 0) {
		snd_card_free(card);
		return err;
	}

	if (pcard)
		pnp_set_card_drvdata(pcard, card);
	else
		snd_cmi8330_legacy[dev] = card;
	return 0;
}

#ifdef CONFIG_PNP
static int __devinit snd_cmi8330_pnp_detect(struct pnp_card_link *card,
					    const struct pnp_card_device_id *id)
{
	static int dev;
	int res;

	for ( ; dev < SNDRV_CARDS; dev++) {
		if (!enable[dev] || !isapnp[dev])
			continue;
		res = snd_cmi8330_probe(dev, card, id);
		if (res < 0)
			return res;
		dev++;
		return 0;
	}
	return -ENODEV;
}

static void __devexit snd_cmi8330_pnp_remove(struct pnp_card_link * pcard)
{
	snd_card_t *card = (snd_card_t *) pnp_get_card_drvdata(pcard);

	snd_card_disconnect(card);
	snd_card_free_in_thread(card);
}

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),
};
#endif /* CONFIG_PNP */

static int __init alsa_card_cmi8330_init(void)
{
	int dev, cards = 0;

	for (dev = 0; dev < SNDRV_CARDS; dev++) {
		if (!enable[dev])
			continue;
#ifdef CONFIG_PNP
		if (isapnp[dev])
			continue;
#endif
		if (snd_cmi8330_probe(dev, NULL, NULL) >= 0)
			cards++;
	}
#ifdef CONFIG_PNP
	cards += pnp_register_card_driver(&cmi8330_pnpc_driver);
#endif

	if (!cards) {
#ifdef CONFIG_PNP
		pnp_unregister_card_driver(&cmi8330_pnpc_driver);
#endif
#ifdef MODULE
		snd_printk(KERN_ERR "CMI8330 not found or device busy\n");
#endif
		return -ENODEV;
	}
	return 0;
}

static void __exit alsa_card_cmi8330_exit(void)
{
	int i;

#ifdef CONFIG_PNP
	/* PnP cards first */
	pnp_unregister_card_driver(&cmi8330_pnpc_driver);
#endif
	for (i = 0; i < SNDRV_CARDS; i++)
		snd_card_free(snd_cmi8330_legacy[i]);
}

module_init(alsa_card_cmi8330_init)
module_exit(alsa_card_cmi8330_exit)