atiixp.c

linux 内核源代码

					      snd_dma_pci_data(chip->pci),
					      64*1024, 128*1024);

	/* no SPDIF support on codec? */
	if (chip->pcms[ATI_PCM_SPDIF] && ! chip->pcms[ATI_PCM_SPDIF]->rates)
		return 0;
		
	/* FIXME: non-48k sample rate doesn't work on my test machine with AD1888 */
	if (chip->pcms[ATI_PCM_SPDIF])
		chip->pcms[ATI_PCM_SPDIF]->rates = SNDRV_PCM_RATE_48000;

	/* PCM #1: spdif playback */
	err = snd_pcm_new(chip->card, "ATI IXP IEC958",
			  ATI_PCMDEV_DIGITAL, 1, 0, &pcm);
	if (err < 0)
		return err;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_spdif_ops);
	pcm->private_data = chip;
	if (chip->spdif_over_aclink)
		strcpy(pcm->name, "ATI IXP IEC958 (AC97)");
	else
		strcpy(pcm->name, "ATI IXP IEC958 (Direct)");
	chip->pcmdevs[ATI_PCMDEV_DIGITAL] = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_pci_data(chip->pci),
					      64*1024, 128*1024);

	/* pre-select AC97 SPDIF slots 10/11 */
	for (i = 0; i < NUM_ATI_CODECS; i++) {
		if (chip->ac97[i])
			snd_ac97_update_bits(chip->ac97[i],
					     AC97_EXTENDED_STATUS,
					     0x03 << 4, 0x03 << 4);
	}

	return 0;
}



/*
 * interrupt handler
 */
static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
{
	struct atiixp *chip = dev_id;
	unsigned int status;

	status = atiixp_read(chip, ISR);

	if (! status)
		return IRQ_NONE;

	/* process audio DMA */
	if (status & ATI_REG_ISR_OUT_XRUN)
		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_PLAYBACK]);
	else if (status & ATI_REG_ISR_OUT_STATUS)
		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
	if (status & ATI_REG_ISR_IN_XRUN)
		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_CAPTURE]);
	else if (status & ATI_REG_ISR_IN_STATUS)
		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
	if (! chip->spdif_over_aclink) {
		if (status & ATI_REG_ISR_SPDF_XRUN)
			snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_SPDIF]);
		else if (status & ATI_REG_ISR_SPDF_STATUS)
			snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_SPDIF]);
	}

	/* for codec detection */
	if (status & CODEC_CHECK_BITS) {
		unsigned int detected;
		detected = status & CODEC_CHECK_BITS;
		spin_lock(&chip->reg_lock);
		chip->codec_not_ready_bits |= detected;
		atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
		spin_unlock(&chip->reg_lock);
	}

	/* ack */
	atiixp_write(chip, ISR, status);

	return IRQ_HANDLED;
}


/*
 * ac97 mixer section
 */

static struct ac97_quirk ac97_quirks[] __devinitdata = {
	{
		.subvendor = 0x103c,
		.subdevice = 0x006b,
		.name = "HP Pavilion ZV5030US",
		.type = AC97_TUNE_MUTE_LED
	},
	{
		.subvendor = 0x103c,
		.subdevice = 0x308b,
		.name = "HP nx6125",
		.type = AC97_TUNE_MUTE_LED
	},
	{ } /* terminator */
};

static int __devinit snd_atiixp_mixer_new(struct atiixp *chip, int clock,
					  const char *quirk_override)
{
	struct snd_ac97_bus *pbus;
	struct snd_ac97_template ac97;
	int i, err;
	int codec_count;
	static struct snd_ac97_bus_ops ops = {
		.write = snd_atiixp_ac97_write,
		.read = snd_atiixp_ac97_read,
	};
	static unsigned int codec_skip[NUM_ATI_CODECS] = {
		ATI_REG_ISR_CODEC0_NOT_READY,
		ATI_REG_ISR_CODEC1_NOT_READY,
		ATI_REG_ISR_CODEC2_NOT_READY,
	};

	if (snd_atiixp_codec_detect(chip) < 0)
		return -ENXIO;

	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
		return err;
	pbus->clock = clock;
	chip->ac97_bus = pbus;

	codec_count = 0;
	for (i = 0; i < NUM_ATI_CODECS; i++) {
		if (chip->codec_not_ready_bits & codec_skip[i])
			continue;
		memset(&ac97, 0, sizeof(ac97));
		ac97.private_data = chip;
		ac97.pci = chip->pci;
		ac97.num = i;
		ac97.scaps = AC97_SCAP_SKIP_MODEM | AC97_SCAP_POWER_SAVE;
		if (! chip->spdif_over_aclink)
			ac97.scaps |= AC97_SCAP_NO_SPDIF;
		if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
			chip->ac97[i] = NULL; /* to be sure */
			snd_printdd("atiixp: codec %d not available for audio\n", i);
			continue;
		}
		codec_count++;
	}

	if (! codec_count) {
		snd_printk(KERN_ERR "atiixp: no codec available\n");
		return -ENODEV;
	}

	snd_ac97_tune_hardware(chip->ac97[0], ac97_quirks, quirk_override);

	return 0;
}


#ifdef CONFIG_PM
/*
 * power management
 */
static int snd_atiixp_suspend(struct pci_dev *pci, pm_message_t state)
{
	struct snd_card *card = pci_get_drvdata(pci);
	struct atiixp *chip = card->private_data;
	int i;

	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	for (i = 0; i < NUM_ATI_PCMDEVS; i++)
		if (chip->pcmdevs[i]) {
			struct atiixp_dma *dma = &chip->dmas[i];
			if (dma->substream && dma->running)
				dma->saved_curptr = readl(chip->remap_addr +
							  dma->ops->dt_cur);
			snd_pcm_suspend_all(chip->pcmdevs[i]);
		}
	for (i = 0; i < NUM_ATI_CODECS; i++)
		snd_ac97_suspend(chip->ac97[i]);
	snd_atiixp_aclink_down(chip);
	snd_atiixp_chip_stop(chip);

	pci_disable_device(pci);
	pci_save_state(pci);
	pci_set_power_state(pci, pci_choose_state(pci, state));
	return 0;
}

static int snd_atiixp_resume(struct pci_dev *pci)
{
	struct snd_card *card = pci_get_drvdata(pci);
	struct atiixp *chip = card->private_data;
	int i;

	pci_set_power_state(pci, PCI_D0);
	pci_restore_state(pci);
	if (pci_enable_device(pci) < 0) {
		printk(KERN_ERR "atiixp: pci_enable_device failed, "
		       "disabling device\n");
		snd_card_disconnect(card);
		return -EIO;
	}
	pci_set_master(pci);

	snd_atiixp_aclink_reset(chip);
	snd_atiixp_chip_start(chip);

	for (i = 0; i < NUM_ATI_CODECS; i++)
		snd_ac97_resume(chip->ac97[i]);

	for (i = 0; i < NUM_ATI_PCMDEVS; i++)
		if (chip->pcmdevs[i]) {
			struct atiixp_dma *dma = &chip->dmas[i];
			if (dma->substream && dma->suspended) {
				dma->ops->enable_dma(chip, 1);
				dma->substream->ops->prepare(dma->substream);
				writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
				       chip->remap_addr + dma->ops->llp_offset);
				writel(dma->saved_curptr, chip->remap_addr +
				       dma->ops->dt_cur);
			}
		}

	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
}
#endif /* CONFIG_PM */


#ifdef CONFIG_PROC_FS
/*
 * proc interface for register dump
 */

static void snd_atiixp_proc_read(struct snd_info_entry *entry,
				 struct snd_info_buffer *buffer)
{
	struct atiixp *chip = entry->private_data;
	int i;

	for (i = 0; i < 256; i += 4)
		snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
}

static void __devinit snd_atiixp_proc_init(struct atiixp *chip)
{
	struct snd_info_entry *entry;

	if (! snd_card_proc_new(chip->card, "atiixp", &entry))
		snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
}
#else /* !CONFIG_PROC_FS */
#define snd_atiixp_proc_init(chip)
#endif


/*
 * destructor
 */

static int snd_atiixp_free(struct atiixp *chip)
{
	if (chip->irq < 0)
		goto __hw_end;
	snd_atiixp_chip_stop(chip);
	synchronize_irq(chip->irq);
      __hw_end:
	if (chip->irq >= 0)
		free_irq(chip->irq, chip);
	if (chip->remap_addr)
		iounmap(chip->remap_addr);
	pci_release_regions(chip->pci);
	pci_disable_device(chip->pci);
	kfree(chip);
	return 0;
}

static int snd_atiixp_dev_free(struct snd_device *device)
{
	struct atiixp *chip = device->device_data;
	return snd_atiixp_free(chip);
}

/*
 * constructor for chip instance
 */
static int __devinit snd_atiixp_create(struct snd_card *card,
				      struct pci_dev *pci,
				      struct atiixp **r_chip)
{
	static struct snd_device_ops ops = {
		.dev_free =	snd_atiixp_dev_free,
	};
	struct atiixp *chip;
	int err;

	if ((err = pci_enable_device(pci)) < 0)
		return err;

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL) {
		pci_disable_device(pci);
		return -ENOMEM;
	}

	spin_lock_init(&chip->reg_lock);
	mutex_init(&chip->open_mutex);
	chip->card = card;
	chip->pci = pci;
	chip->irq = -1;
	if ((err = pci_request_regions(pci, "ATI IXP AC97")) < 0) {
		pci_disable_device(pci);
		kfree(chip);
		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 "AC'97 space ioremap problem\n");
		snd_atiixp_free(chip);
		return -EIO;
	}

	if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
			card->shortname, chip)) {
		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
		snd_atiixp_free(chip);
		return -EBUSY;
	}
	chip->irq = pci->irq;
	pci_set_master(pci);
	synchronize_irq(chip->irq);

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
		snd_atiixp_free(chip);
		return err;
	}

	snd_card_set_dev(card, &pci->dev);

	*r_chip = chip;
	return 0;
}


static int __devinit snd_atiixp_probe(struct pci_dev *pci,
				     const struct pci_device_id *pci_id)
{
	struct snd_card *card;
	struct atiixp *chip;
	int err;

	card = snd_card_new(index, id, THIS_MODULE, 0);
	if (card == NULL)
		return -ENOMEM;

	strcpy(card->driver, spdif_aclink ? "ATIIXP" : "ATIIXP-SPDMA");
	strcpy(card->shortname, "ATI IXP");
	if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
		goto __error;
	card->private_data = chip;

	if ((err = snd_atiixp_aclink_reset(chip)) < 0)
		goto __error;

	chip->spdif_over_aclink = spdif_aclink;

	if ((err = snd_atiixp_mixer_new(chip, ac97_clock, ac97_quirk)) < 0)
		goto __error;

	if ((err = snd_atiixp_pcm_new(chip)) < 0)
		goto __error;
	
	snd_atiixp_proc_init(chip);

	snd_atiixp_chip_start(chip);

	snprintf(card->longname, sizeof(card->longname),
		 "%s rev %x with %s at %#lx, irq %i", card->shortname,
		 pci->revision,
		 chip->ac97[0] ? snd_ac97_get_short_name(chip->ac97[0]) : "?",
		 chip->addr, chip->irq);

	if ((err = snd_card_register(card)) < 0)
		goto __error;

	pci_set_drvdata(pci, card);
	return 0;

 __error:
	snd_card_free(card);
	return err;
}

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

static struct pci_driver driver = {
	.name = "ATI IXP AC97 controller",
	.id_table = snd_atiixp_ids,
	.probe = snd_atiixp_probe,
	.remove = __devexit_p(snd_atiixp_remove),
#ifdef CONFIG_PM
	.suspend = snd_atiixp_suspend,
	.resume = snd_atiixp_resume,
#endif
};


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

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

module_init(alsa_card_atiixp_init)
module_exit(alsa_card_atiixp_exit)