hda_intel.c

				  azx_dev->format_val, substream);
}

static int azx_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
{
	struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
	azx_dev_t *azx_dev = get_azx_dev(substream);
	azx_t *chip = apcm->chip;
	int err = 0;

	spin_lock(&chip->reg_lock);
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_START:
		azx_stream_start(chip, azx_dev);
		azx_dev->running = 1;
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	case SNDRV_PCM_TRIGGER_STOP:
		azx_stream_stop(chip, azx_dev);
		azx_dev->running = 0;
		break;
	default:
		err = -EINVAL;
	}
	spin_unlock(&chip->reg_lock);
	if (cmd == SNDRV_PCM_TRIGGER_PAUSE_PUSH ||
	    cmd == SNDRV_PCM_TRIGGER_STOP) {
		int timeout = 5000;
		while (azx_sd_readb(azx_dev, SD_CTL) & SD_CTL_DMA_START && --timeout)
			;
	}
	return err;
}

static snd_pcm_uframes_t azx_pcm_pointer(snd_pcm_substream_t *substream)
{
	azx_dev_t *azx_dev = get_azx_dev(substream);
	unsigned int pos;

#ifdef USE_POSBUF
	/* use the position buffer */
	pos = *azx_dev->posbuf;
#else
	/* read LPIB */
	pos = azx_sd_readl(azx_dev, SD_LPIB) + azx_dev->fifo_size;
#endif
	if (pos >= azx_dev->bufsize)
		pos = 0;
	return bytes_to_frames(substream->runtime, pos);
}

static snd_pcm_ops_t azx_pcm_ops = {
	.open = azx_pcm_open,
	.close = azx_pcm_close,
	.ioctl = snd_pcm_lib_ioctl,
	.hw_params = azx_pcm_hw_params,
	.hw_free = azx_pcm_hw_free,
	.prepare = azx_pcm_prepare,
	.trigger = azx_pcm_trigger,
	.pointer = azx_pcm_pointer,
};

static void azx_pcm_free(snd_pcm_t *pcm)
{
	kfree(pcm->private_data);
}

static int __devinit create_codec_pcm(azx_t *chip, struct hda_codec *codec,
				      struct hda_pcm *cpcm, int pcm_dev)
{
	int err;
	snd_pcm_t *pcm;
	struct azx_pcm *apcm;

	snd_assert(cpcm->stream[0].substreams || cpcm->stream[1].substreams, return -EINVAL);
	snd_assert(cpcm->name, return -EINVAL);

	err = snd_pcm_new(chip->card, cpcm->name, pcm_dev,
			  cpcm->stream[0].substreams, cpcm->stream[1].substreams,
			  &pcm);
	if (err < 0)
		return err;
	strcpy(pcm->name, cpcm->name);
	apcm = kmalloc(sizeof(*apcm), GFP_KERNEL);
	if (apcm == NULL)
		return -ENOMEM;
	apcm->chip = chip;
	apcm->codec = codec;
	apcm->hinfo[0] = &cpcm->stream[0];
	apcm->hinfo[1] = &cpcm->stream[1];
	pcm->private_data = apcm;
	pcm->private_free = azx_pcm_free;
	if (cpcm->stream[0].substreams)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &azx_pcm_ops);
	if (cpcm->stream[1].substreams)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &azx_pcm_ops);
	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(chip->pci),
					      1024 * 64, 1024 * 128);
	chip->pcm[pcm_dev] = pcm;

	return 0;
}

static int __devinit azx_pcm_create(azx_t *chip)
{
	struct list_head *p;
	struct hda_codec *codec;
	int c, err;
	int pcm_dev;

	if ((err = snd_hda_build_pcms(chip->bus)) < 0)
		return err;

	pcm_dev = 0;
	list_for_each(p, &chip->bus->codec_list) {
		codec = list_entry(p, struct hda_codec, list);
		for (c = 0; c < codec->num_pcms; c++) {
			if (pcm_dev >= AZX_MAX_PCMS) {
				snd_printk(KERN_ERR SFX "Too many PCMs\n");
				return -EINVAL;
			}
			err = create_codec_pcm(chip, codec, &codec->pcm_info[c], pcm_dev);
			if (err < 0)
				return err;
			pcm_dev++;
		}
	}
	return 0;
}

/*
 * mixer creation - all stuff is implemented in hda module
 */
static int __devinit azx_mixer_create(azx_t *chip)
{
	return snd_hda_build_controls(chip->bus);
}


/*
 * initialize SD streams
 */
static int __devinit azx_init_stream(azx_t *chip)
{
	int i;

	/* initialize each stream (aka device)
	 * assign the starting bdl address to each stream (device) and initialize
	 */
	for (i = 0; i < MAX_ICH6_DEV; i++) {
		unsigned int off = sizeof(u32) * (i * AZX_MAX_FRAG * 4);
		azx_dev_t *azx_dev = &chip->azx_dev[i];
		azx_dev->bdl = (u32 *)(chip->bdl.area + off);
		azx_dev->bdl_addr = chip->bdl.addr + off;
#ifdef USE_POSBUF
		azx_dev->posbuf = (volatile u32 *)(chip->posbuf.area + i * 8);
#endif
		/* offset: SDI0=0x80, SDI1=0xa0, ... SDO3=0x160 */
		azx_dev->sd_addr = chip->remap_addr + (0x20 * i + 0x80);
		/* int mask: SDI0=0x01, SDI1=0x02, ... SDO3=0x80 */
		azx_dev->sd_int_sta_mask = 1 << i;
		/* stream tag: must be non-zero and unique */
		azx_dev->index = i;
		azx_dev->stream_tag = i + 1;
	}

	return 0;
}


#ifdef CONFIG_PM
/*
 * power management
 */
static int azx_suspend(snd_card_t *card, pm_message_t state)
{
	azx_t *chip = card->pm_private_data;
	int i;

	for (i = 0; i < chip->pcm_devs; i++)
		if (chip->pcm[i])
			snd_pcm_suspend_all(chip->pcm[i]);
	snd_hda_suspend(chip->bus, state);
	azx_free_cmd_io(chip);
	pci_disable_device(chip->pci);
	return 0;
}

static int azx_resume(snd_card_t *card)
{
	azx_t *chip = card->pm_private_data;

	pci_enable_device(chip->pci);
	pci_set_master(chip->pci);
	azx_init_chip(chip);
	snd_hda_resume(chip->bus);
	return 0;
}
#endif /* CONFIG_PM */


/*
 * destructor
 */
static int azx_free(azx_t *chip)
{
	if (chip->remap_addr) {
		int i;

		for (i = 0; i < MAX_ICH6_DEV; i++)
			azx_stream_stop(chip, &chip->azx_dev[i]);

		/* disable interrupts */
		azx_int_disable(chip);
		azx_int_clear(chip);

		/* disable CORB/RIRB */
		azx_free_cmd_io(chip);

		/* disable position buffer */
		azx_writel(chip, DPLBASE, 0);
		azx_writel(chip, DPUBASE, 0);

		/* wait a little for interrupts to finish */
		msleep(1);

		iounmap(chip->remap_addr);
	}

	if (chip->irq >= 0)
		free_irq(chip->irq, (void*)chip);

	if (chip->bdl.area)
		snd_dma_free_pages(&chip->bdl);
	if (chip->rb.area)
		snd_dma_free_pages(&chip->rb);
#ifdef USE_POSBUF
	if (chip->posbuf.area)
		snd_dma_free_pages(&chip->posbuf);
#endif
	pci_release_regions(chip->pci);
	pci_disable_device(chip->pci);
	kfree(chip);

	return 0;
}

static int azx_dev_free(snd_device_t *device)
{
	return azx_free(device->device_data);
}

/*
 * constructor
 */
static int __devinit azx_create(snd_card_t *card, struct pci_dev *pci, azx_t **rchip)
{
	azx_t *chip;
	int err = 0;
	static snd_device_ops_t ops = {
		.dev_free = azx_dev_free,
	};

	*rchip = NULL;
	
	if ((err = pci_enable_device(pci)) < 0)
		return err;

	chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
	
	if (NULL == chip) {
		snd_printk(KERN_ERR SFX "cannot allocate chip\n");
		pci_disable_device(pci);
		return -ENOMEM;
	}

	spin_lock_init(&chip->reg_lock);
	init_MUTEX(&chip->open_mutex);
	chip->card = card;
	chip->pci = pci;
	chip->irq = -1;

	if ((err = pci_request_regions(pci, "ICH HD audio")) < 0) {
		kfree(chip);
		pci_disable_device(pci);
		return err;
	}

	chip->addr = pci_resource_start(pci,0);
	chip->remap_addr = ioremap_nocache(chip->addr, pci_resource_len(pci,0));
	if (chip->remap_addr == NULL) {
		snd_printk(KERN_ERR SFX "ioremap error\n");
		err = -ENXIO;
		goto errout;
	}

	if (request_irq(pci->irq, azx_interrupt, SA_INTERRUPT|SA_SHIRQ,
			"HDA Intel", (void*)chip)) {
		snd_printk(KERN_ERR SFX "unable to grab IRQ %d\n", pci->irq);
		err = -EBUSY;
		goto errout;
	}
	chip->irq = pci->irq;

	pci_set_master(pci);
	synchronize_irq(chip->irq);

	/* allocate memory for the BDL for each stream */
	if ((err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
				       PAGE_SIZE, &chip->bdl)) < 0) {
		snd_printk(KERN_ERR SFX "cannot allocate BDL\n");
		goto errout;
	}
#ifdef USE_POSBUF
	/* allocate memory for the position buffer */
	if ((err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
				       MAX_ICH6_DEV * 8, &chip->posbuf)) < 0) {
		snd_printk(KERN_ERR SFX "cannot allocate posbuf\n");
		goto errout;
	}
#endif
	/* allocate CORB/RIRB */
	if ((err = azx_alloc_cmd_io(chip)) < 0)
		goto errout;

	/* initialize streams */
	azx_init_stream(chip);

	/* initialize chip */
	azx_init_chip(chip);

	/* codec detection */
	if (! chip->codec_mask) {
		snd_printk(KERN_ERR SFX "no codecs found!\n");
		err = -ENODEV;
		goto errout;
	}

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) <0) {
		snd_printk(KERN_ERR SFX "Error creating device [card]!\n");
		goto errout;
	}

	*rchip = chip;
	return 0;

 errout:
	azx_free(chip);
	return err;
}

static int __devinit azx_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
{
	static int dev;
	snd_card_t *card;
	azx_t *chip;
	int err = 0;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (! enable[dev]) {
		dev++;
		return -ENOENT;
	}

	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
	if (NULL == card) {
		snd_printk(KERN_ERR SFX "Error creating card!\n");
		return -ENOMEM;
	}

	if ((err = azx_create(card, pci, &chip)) < 0) {
		snd_card_free(card);
		return err;
	}

	strcpy(card->driver, "HDA-Intel");
	strcpy(card->shortname, "HDA Intel");
	sprintf(card->longname, "%s at 0x%lx irq %i", card->shortname, chip->addr, chip->irq);

	/* create codec instances */
	if ((err = azx_codec_create(chip, model[dev])) < 0) {
		snd_card_free(card);
		return err;
	}

	/* create PCM streams */
	if ((err = azx_pcm_create(chip)) < 0) {
		snd_card_free(card);
		return err;
	}

	/* create mixer controls */
	if ((err = azx_mixer_create(chip)) < 0) {
		snd_card_free(card);
		return err;
	}

	snd_card_set_pm_callback(card, azx_suspend, azx_resume, chip);
	snd_card_set_dev(card, &pci->dev);

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

	pci_set_drvdata(pci, card);
	dev++;

	return err;
}

static void __devexit azx_remove(struct pci_dev *pci)
{
	snd_card_free(pci_get_drvdata(pci));
	pci_set_drvdata(pci, NULL);
}

/* PCI IDs */
static struct pci_device_id azx_ids[] = {
	{ 0x8086, 0x2668, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* ICH6 */
	{ 0x8086, 0x27d8, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* ICH7 */
	{ 0x8086, 0x269a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* ESB2 */
	{ 0, }
};
MODULE_DEVICE_TABLE(pci, azx_ids);

/* pci_driver definition */
static struct pci_driver driver = {
	.name = "HDA Intel",
	.id_table = azx_ids,
	.probe = azx_probe,
	.remove = __devexit_p(azx_remove),
	SND_PCI_PM_CALLBACKS
};

static int __init alsa_card_azx_init(void)
{
	return pci_register_driver(&driver);
}

static void __exit alsa_card_azx_exit(void)
{
	pci_unregister_driver(&driver);
}

module_init(alsa_card_azx_init)
module_exit(alsa_card_azx_exit)