azt3328.c

linux 内核源代码

	snd_azf3328_dbgcallenter();
	*num = 1;
	*den = 1024000 / seqtimer_scaling;
	snd_azf3328_dbgcallleave();
	return 0;
}

static struct snd_timer_hardware snd_azf3328_timer_hw = {
	.flags = SNDRV_TIMER_HW_AUTO,
	.resolution = 977, /* 1000000/1024000 = 0.9765625us */
	.ticks = 1024000, /* max tick count, defined by the value register; actually it's not 1024000, but 1048576, but we don't care */
	.start = snd_azf3328_timer_start,
	.stop = snd_azf3328_timer_stop,
	.precise_resolution = snd_azf3328_timer_precise_resolution,
};

static int __devinit
snd_azf3328_timer(struct snd_azf3328 *chip, int device)
{
	struct snd_timer *timer = NULL;
	struct snd_timer_id tid;
	int err;

	snd_azf3328_dbgcallenter();
	tid.dev_class = SNDRV_TIMER_CLASS_CARD;
	tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
	tid.card = chip->card->number;
	tid.device = device;
	tid.subdevice = 0;

	snd_azf3328_timer_hw.resolution *= seqtimer_scaling;
	snd_azf3328_timer_hw.ticks /= seqtimer_scaling;
	if ((err = snd_timer_new(chip->card, "AZF3328", &tid, &timer)) < 0) {
		goto out;
	}

	strcpy(timer->name, "AZF3328 timer");
	timer->private_data = chip;
	timer->hw = snd_azf3328_timer_hw;

	chip->timer = timer;

	err = 0;

out:
	snd_azf3328_dbgcallleave();
	return err;
}

/******************************************************************/

#if 0
/* check whether a bit can be modified */
static void
snd_azf3328_test_bit(unsigned int reg, int bit)
{
	unsigned char val, valoff, valon;

	val = inb(reg);

	outb(val & ~(1 << bit), reg);
	valoff = inb(reg);

	outb(val|(1 << bit), reg);
	valon = inb(reg);
	
	outb(val, reg);

	printk(KERN_ERR "reg %04x bit %d: %02x %02x %02x\n", reg, bit, val, valoff, valon);
}
#endif

#if DEBUG_MISC
static void
snd_azf3328_debug_show_ports(const struct snd_azf3328 *chip)
{
	u16 tmp;

	snd_azf3328_dbgmisc("codec_port 0x%lx, io2_port 0x%lx, mpu_port 0x%lx, synth_port 0x%lx, mixer_port 0x%lx, irq %d\n", chip->codec_port, chip->io2_port, chip->mpu_port, chip->synth_port, chip->mixer_port, chip->irq);

	snd_azf3328_dbgmisc("io2 %02x %02x %02x %02x %02x %02x\n", snd_azf3328_io2_inb(chip, 0), snd_azf3328_io2_inb(chip, 1), snd_azf3328_io2_inb(chip, 2), snd_azf3328_io2_inb(chip, 3), snd_azf3328_io2_inb(chip, 4), snd_azf3328_io2_inb(chip, 5));

	for (tmp=0; tmp <= 0x01; tmp += 1)
		snd_azf3328_dbgmisc("0x%02x: opl 0x%04x, mpu300 0x%04x, mpu310 0x%04x, mpu320 0x%04x, mpu330 0x%04x\n", tmp, inb(0x388 + tmp), inb(0x300 + tmp), inb(0x310 + tmp), inb(0x320 + tmp), inb(0x330 + tmp));

	for (tmp = 0; tmp < AZF_IO_SIZE_CODEC; tmp += 2)
		snd_azf3328_dbgmisc("codec 0x%02x: 0x%04x\n", tmp, snd_azf3328_codec_inw(chip, tmp));

	for (tmp = 0; tmp < AZF_IO_SIZE_MIXER; tmp += 2)
		snd_azf3328_dbgmisc("mixer 0x%02x: 0x%04x\n", tmp, snd_azf3328_mixer_inw(chip, tmp));
}
#else
static inline void
snd_azf3328_debug_show_ports(const struct snd_azf3328 *chip) {}
#endif

static int __devinit
snd_azf3328_create(struct snd_card *card,
                                         struct pci_dev *pci,
                                         unsigned long device_type,
                                         struct snd_azf3328 ** rchip)
{
	struct snd_azf3328 *chip;
	int err;
	static struct snd_device_ops ops = {
		.dev_free =     snd_azf3328_dev_free,
	};
	u16 tmp;

	*rchip = NULL;

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

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL) {
		err = -ENOMEM;
		goto out_err;
	}
	spin_lock_init(&chip->reg_lock);
	chip->card = card;
	chip->pci = pci;
	chip->irq = -1;

	/* check if we can restrict PCI DMA transfers to 24 bits */
	if (pci_set_dma_mask(pci, DMA_24BIT_MASK) < 0 ||
	    pci_set_consistent_dma_mask(pci, DMA_24BIT_MASK) < 0) {
		snd_printk(KERN_ERR "architecture does not support 24bit PCI busmaster DMA\n");
		err = -ENXIO;
		goto out_err;
	}

	if ((err = pci_request_regions(pci, "Aztech AZF3328")) < 0) {
		goto out_err;
	}

	chip->codec_port = pci_resource_start(pci, 0);
	chip->io2_port   = pci_resource_start(pci, 1);
	chip->mpu_port   = pci_resource_start(pci, 2);
	chip->synth_port = pci_resource_start(pci, 3);
	chip->mixer_port = pci_resource_start(pci, 4);

	if (request_irq(pci->irq, snd_azf3328_interrupt,
			IRQF_SHARED, card->shortname, chip)) {
		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
		err = -EBUSY;
		goto out_err;
	}
	chip->irq = pci->irq;
	pci_set_master(pci);
	synchronize_irq(chip->irq);

	snd_azf3328_debug_show_ports(chip);
	
	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
		goto out_err;
	}

	/* create mixer interface & switches */
	if ((err = snd_azf3328_mixer_new(chip)) < 0)
		goto out_err;

#if 0
	/* set very low bitrate to reduce noise and power consumption? */
	snd_azf3328_setfmt(chip, IDX_IO_PLAY_SOUNDFORMAT, 5512, 8, 1);
#endif

	/* standard chip init stuff */
	/* default IRQ init value */
	tmp = DMA_PLAY_SOMETHING2|DMA_EPILOGUE_SOMETHING|DMA_SOMETHING_ELSE;

	spin_lock_irq(&chip->reg_lock);
	snd_azf3328_codec_outb(chip, IDX_IO_PLAY_FLAGS, tmp);
	snd_azf3328_codec_outb(chip, IDX_IO_REC_FLAGS, tmp);
	snd_azf3328_codec_outb(chip, IDX_IO_SOMETHING_FLAGS, tmp);
	snd_azf3328_codec_outb(chip, IDX_IO_TIMER_VALUE + 3, 0x00); /* disable timer */
	spin_unlock_irq(&chip->reg_lock);

	snd_card_set_dev(card, &pci->dev);

	*rchip = chip;

	err = 0;
	goto out;

out_err:
	if (chip)
		snd_azf3328_free(chip);
	pci_disable_device(pci);

out:
	return err;
}

static int __devinit
snd_azf3328_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
{
	static int dev;
	struct snd_card *card;
	struct snd_azf3328 *chip;
	struct snd_opl3 *opl3;
	int err;

	snd_azf3328_dbgcallenter();
	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}

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

	strcpy(card->driver, "AZF3328");
	strcpy(card->shortname, "Aztech AZF3328 (PCI168)");

        if ((err = snd_azf3328_create(card, pci, pci_id->driver_data, &chip)) < 0) {
		goto out_err;
	}

	card->private_data = chip;

	if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_MPU401,
				        chip->mpu_port, MPU401_INFO_INTEGRATED,
					pci->irq, 0, &chip->rmidi)) < 0) {
		snd_printk(KERN_ERR "azf3328: no MPU-401 device at 0x%lx?\n", chip->mpu_port);
		goto out_err;
	}

	if ((err = snd_azf3328_timer(chip, 0)) < 0) {
		goto out_err;
	}

	if ((err = snd_azf3328_pcm(chip, 0)) < 0) {
		goto out_err;
	}

	if (snd_opl3_create(card, chip->synth_port, chip->synth_port+2,
			    OPL3_HW_AUTO, 1, &opl3) < 0) {
		snd_printk(KERN_ERR "azf3328: no OPL3 device at 0x%lx-0x%lx?\n",
			   chip->synth_port, chip->synth_port+2 );
	} else {
		if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
			goto out_err;
		}
	}

	opl3->private_data = chip;

	sprintf(card->longname, "%s at 0x%lx, irq %i",
		card->shortname, chip->codec_port, chip->irq);

	if ((err = snd_card_register(card)) < 0) {
		goto out_err;
	}

#ifdef MODULE
	printk(
"azt3328: Sound driver for Aztech AZF3328-based soundcards such as PCI168.\n"
"azt3328: Hardware was completely undocumented, unfortunately.\n"
"azt3328: Feel free to contact andi AT lisas.de for bug reports etc.!\n"
"azt3328: User-scalable sequencer timer set to %dHz (1024000Hz / %d).\n",
	1024000 / seqtimer_scaling, seqtimer_scaling);
#endif

	if (snd_azf3328_config_joystick(chip, dev) < 0)
		snd_azf3328_io2_outb(chip, IDX_IO2_LEGACY_ADDR,
			      snd_azf3328_io2_inb(chip, IDX_IO2_LEGACY_ADDR) & ~LEGACY_JOY);

	pci_set_drvdata(pci, card);
	dev++;

	err = 0;
	goto out;
	
out_err:
	snd_card_free(card);
	
out:
	snd_azf3328_dbgcallleave();
	return err;
}

static void __devexit
snd_azf3328_remove(struct pci_dev *pci)
{
	snd_azf3328_dbgcallenter();
	snd_card_free(pci_get_drvdata(pci));
	pci_set_drvdata(pci, NULL);
	snd_azf3328_dbgcallleave();
}

#ifdef CONFIG_PM
static int
snd_azf3328_suspend(struct pci_dev *pci, pm_message_t state)
{
	struct snd_card *card = pci_get_drvdata(pci);
	struct snd_azf3328 *chip = card->private_data;
	int reg;

	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	
	snd_pcm_suspend_all(chip->pcm);

	for (reg = 0; reg < AZF_IO_SIZE_MIXER_PM / 2; reg++)
		chip->saved_regs_mixer[reg] = inw(chip->mixer_port + reg * 2);

	/* make sure to disable master volume etc. to prevent looping sound */
	snd_azf3328_mixer_set_mute(chip, IDX_MIXER_PLAY_MASTER, 1);
	snd_azf3328_mixer_set_mute(chip, IDX_MIXER_WAVEOUT, 1);
	
	for (reg = 0; reg < AZF_IO_SIZE_CODEC_PM / 2; reg++)
		chip->saved_regs_codec[reg] = inw(chip->codec_port + reg * 2);
	for (reg = 0; reg < AZF_IO_SIZE_IO2_PM / 2; reg++)
		chip->saved_regs_io2[reg] = inw(chip->io2_port + reg * 2);
	for (reg = 0; reg < AZF_IO_SIZE_MPU_PM / 2; reg++)
		chip->saved_regs_mpu[reg] = inw(chip->mpu_port + reg * 2);
	for (reg = 0; reg < AZF_IO_SIZE_SYNTH_PM / 2; reg++)
		chip->saved_regs_synth[reg] = inw(chip->synth_port + reg * 2);

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

static int
snd_azf3328_resume(struct pci_dev *pci)
{
	struct snd_card *card = pci_get_drvdata(pci);
	struct snd_azf3328 *chip = card->private_data;
	int reg;

	pci_set_power_state(pci, PCI_D0);
	pci_restore_state(pci);
	if (pci_enable_device(pci) < 0) {
		printk(KERN_ERR "azt3328: pci_enable_device failed, "
		       "disabling device\n");
		snd_card_disconnect(card);
		return -EIO;
	}
	pci_set_master(pci);

	for (reg = 0; reg < AZF_IO_SIZE_IO2_PM / 2; reg++)
		outw(chip->saved_regs_io2[reg], chip->io2_port + reg * 2);
	for (reg = 0; reg < AZF_IO_SIZE_MPU_PM / 2; reg++)
		outw(chip->saved_regs_mpu[reg], chip->mpu_port + reg * 2);
	for (reg = 0; reg < AZF_IO_SIZE_SYNTH_PM / 2; reg++)
		outw(chip->saved_regs_synth[reg], chip->synth_port + reg * 2);
	for (reg = 0; reg < AZF_IO_SIZE_MIXER_PM / 2; reg++)
		outw(chip->saved_regs_mixer[reg], chip->mixer_port + reg * 2);
	for (reg = 0; reg < AZF_IO_SIZE_CODEC_PM / 2; reg++)
		outw(chip->saved_regs_codec[reg], chip->codec_port + reg * 2);

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




static struct pci_driver driver = {
	.name = "AZF3328",
	.id_table = snd_azf3328_ids,
	.probe = snd_azf3328_probe,
	.remove = __devexit_p(snd_azf3328_remove),
#ifdef CONFIG_PM
	.suspend = snd_azf3328_suspend,
	.resume = snd_azf3328_resume,
#endif
};

static int __init
alsa_card_azf3328_init(void)
{
	int err;
	snd_azf3328_dbgcallenter();
	err = pci_register_driver(&driver);
	snd_azf3328_dbgcallleave();
	return err;
}

static void __exit
alsa_card_azf3328_exit(void)
{
	snd_azf3328_dbgcallenter();
	pci_unregister_driver(&driver);
	snd_azf3328_dbgcallleave();
}

module_init(alsa_card_azf3328_init)
module_exit(alsa_card_azf3328_exit)