sb16.c

linux2.6.16版本

	int err;

	xirq = irq[dev];
	xdma8 = dma8[dev];
	xdma16 = dma16[dev];

	if ((err = snd_sbdsp_create(card,
				    port[dev],
				    xirq,
				    snd_sb16dsp_interrupt,
				    xdma8,
				    xdma16,
				    SB_HW_AUTO,
				    &chip)) < 0)
		return err;

	acard->chip = chip;
	if (chip->hardware != SB_HW_16) {
		snd_printk(KERN_ERR PFX "SB 16 chip was not detected at 0x%lx\n", port[dev]);
		return -ENODEV;
	}
	chip->mpu_port = mpu_port[dev];
	if (! is_isapnp_selected(dev) && (err = snd_sb16dsp_configure(chip)) < 0)
		return err;

	if ((err = snd_sb16dsp_pcm(chip, 0, &chip->pcm)) < 0)
		return err;

	strcpy(card->driver,
#ifdef SNDRV_SBAWE_EMU8000
			awe_port[dev] > 0 ? "SB AWE" :
#endif
			"SB16");
	strcpy(card->shortname, chip->name);
	sprintf(card->longname, "%s at 0x%lx, irq %i, dma ",
		chip->name,
		chip->port,
		xirq);
	if (xdma8 >= 0)
		sprintf(card->longname + strlen(card->longname), "%d", xdma8);
	if (xdma16 >= 0)
		sprintf(card->longname + strlen(card->longname), "%s%d",
			xdma8 >= 0 ? "&" : "", xdma16);

	if (chip->mpu_port > 0 && chip->mpu_port != SNDRV_AUTO_PORT) {
		if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_SB,
					       chip->mpu_port, 0,
					       xirq, 0, &chip->rmidi)) < 0)
			return err;
		chip->rmidi_callback = snd_mpu401_uart_interrupt;
	}

#ifdef SNDRV_SBAWE_EMU8000
	if (awe_port[dev] == SNDRV_AUTO_PORT)
		awe_port[dev] = 0; /* disable */
#endif

	if (fm_port[dev] > 0 && fm_port[dev] != SNDRV_AUTO_PORT) {
		if (snd_opl3_create(card, fm_port[dev], fm_port[dev] + 2,
				    OPL3_HW_OPL3,
				    acard->fm_res != NULL || fm_port[dev] == port[dev],
				    &opl3) < 0) {
			snd_printk(KERN_ERR PFX "no OPL device at 0x%lx-0x%lx\n",
				   fm_port[dev], fm_port[dev] + 2);
		} else {
#ifdef SNDRV_SBAWE_EMU8000
			int seqdev = awe_port[dev] > 0 ? 2 : 1;
#else
			int seqdev = 1;
#endif
			if ((err = snd_opl3_hwdep_new(opl3, 0, seqdev, &synth)) < 0)
				return err;
		}
	}

	if ((err = snd_sbmixer_new(chip)) < 0)
		return err;

#ifdef CONFIG_SND_SB16_CSP
	/* CSP chip on SB16ASP/AWE32 */
	if ((chip->hardware == SB_HW_16) && csp[dev]) {
		snd_sb_csp_new(chip, synth != NULL ? 1 : 0, &xcsp);
		if (xcsp) {
			chip->csp = xcsp->private_data;
			chip->hardware = SB_HW_16CSP;
		} else {
			snd_printk(KERN_INFO PFX "warning - CSP chip not detected on soundcard #%i\n", dev + 1);
		}
	}
#endif
#ifdef SNDRV_SBAWE_EMU8000
	if (awe_port[dev] > 0) {
		if ((err = snd_emu8000_new(card, 1, awe_port[dev],
					   seq_ports[dev], NULL)) < 0) {
			snd_printk(KERN_ERR PFX "fatal error - EMU-8000 synthesizer not detected at 0x%lx\n", awe_port[dev]);

			return err;
		}
	}
#endif

	/* setup Mic AGC */
	spin_lock_irqsave(&chip->mixer_lock, flags);
	snd_sbmixer_write(chip, SB_DSP4_MIC_AGC,
		(snd_sbmixer_read(chip, SB_DSP4_MIC_AGC) & 0x01) |
		(mic_agc[dev] ? 0x00 : 0x01));
	spin_unlock_irqrestore(&chip->mixer_lock, flags);

	if ((err = snd_card_register(card)) < 0)
		return err;

	return 0;
}

#ifdef CONFIG_PM
static int snd_sb16_suspend(struct snd_card *card, pm_message_t state)
{
	struct snd_card_sb16 *acard = card->private_data;
	struct snd_sb *chip = acard->chip;

	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	snd_pcm_suspend_all(chip->pcm);
	snd_sbmixer_suspend(chip);
	return 0;
}

static int snd_sb16_resume(struct snd_card *card)
{
	struct snd_card_sb16 *acard = card->private_data;
	struct snd_sb *chip = acard->chip;

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

static int __init snd_sb16_nonpnp_probe1(int dev, struct platform_device *devptr)
{
	struct snd_card_sb16 *acard;
	struct snd_card *card;
	int err;

	card = snd_sb16_card_new(dev);
	if (! card)
		return -ENOMEM;

	acard = card->private_data;
	/* non-PnP FM port address is hardwired with base port address */
	fm_port[dev] = port[dev];
	/* block the 0x388 port to avoid PnP conflicts */
	acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
#ifdef SNDRV_SBAWE_EMU8000
	/* non-PnP AWE port address is hardwired with base port address */
	awe_port[dev] = port[dev] + 0x400;
#endif

	snd_card_set_dev(card, &devptr->dev);
	if ((err = snd_sb16_probe(card, dev)) < 0) {
		snd_card_free(card);
		return err;
	}
	platform_set_drvdata(devptr, card);
	return 0;
}


static int __init snd_sb16_nonpnp_probe(struct platform_device *pdev)
{
	int dev = pdev->id;
	int err;
	static int possible_irqs[] = {5, 9, 10, 7, -1};
	static int possible_dmas8[] = {1, 3, 0, -1};
	static int possible_dmas16[] = {5, 6, 7, -1};

	if (irq[dev] == SNDRV_AUTO_IRQ) {
		if ((irq[dev] = snd_legacy_find_free_irq(possible_irqs)) < 0) {
			snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
			return -EBUSY;
		}
	}
	if (dma8[dev] == SNDRV_AUTO_DMA) {
		if ((dma8[dev] = snd_legacy_find_free_dma(possible_dmas8)) < 0) {
			snd_printk(KERN_ERR PFX "unable to find a free 8-bit DMA\n");
			return -EBUSY;
		}
	}
	if (dma16[dev] == SNDRV_AUTO_DMA) {
		if ((dma16[dev] = snd_legacy_find_free_dma(possible_dmas16)) < 0) {
			snd_printk(KERN_ERR PFX "unable to find a free 16-bit DMA\n");
			return -EBUSY;
		}
	}

	if (port[dev] != SNDRV_AUTO_PORT)
		return snd_sb16_nonpnp_probe1(dev, pdev);
	else {
		static int possible_ports[] = {0x220, 0x240, 0x260, 0x280};
		int i;
		for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
			port[dev] = possible_ports[i];
			err = snd_sb16_nonpnp_probe1(dev, pdev);
			if (! err)
				return 0;
		}
		return err;
	}
}

static int __devexit snd_sb16_nonpnp_remove(struct platform_device *devptr)
{
	snd_card_free(platform_get_drvdata(devptr));
	platform_set_drvdata(devptr, NULL);
	return 0;
}

#ifdef CONFIG_PM
static int snd_sb16_nonpnp_suspend(struct platform_device *dev, pm_message_t state)
{
	return snd_sb16_suspend(platform_get_drvdata(dev), state);
}

static int snd_sb16_nonpnp_resume(struct platform_device *dev)
{
	return snd_sb16_resume(platform_get_drvdata(dev));
}
#endif

#ifdef SNDRV_SBAWE
#define SND_SB16_DRIVER	"snd_sbawe"
#else
#define SND_SB16_DRIVER	"snd_sb16"
#endif

static struct platform_driver snd_sb16_nonpnp_driver = {
	.probe		= snd_sb16_nonpnp_probe,
	.remove		= __devexit_p(snd_sb16_nonpnp_remove),
#ifdef CONFIG_PM
	.suspend	= snd_sb16_nonpnp_suspend,
	.resume		= snd_sb16_nonpnp_resume,
#endif
	.driver		= {
		.name	= SND_SB16_DRIVER
	},
};


#ifdef CONFIG_PNP

static int __devinit snd_sb16_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])
			continue;
		card = snd_sb16_card_new(dev);
		if (! card)
			return -ENOMEM;
		snd_card_set_dev(card, &pcard->card->dev);
		if ((res = snd_card_sb16_pnp(dev, card->private_data, pcard, pid)) < 0 ||
		    (res = snd_sb16_probe(card, dev)) < 0) {
			snd_card_free(card);
			return res;
		}
		pnp_set_card_drvdata(pcard, card);
		dev++;
		return 0;
	}

	return -ENODEV;
}

static void __devexit snd_sb16_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_sb16_pnp_suspend(struct pnp_card_link *pcard, pm_message_t state)
{
	return snd_sb16_suspend(pnp_get_card_drvdata(pcard), state);
}
static int snd_sb16_pnp_resume(struct pnp_card_link *pcard)
{
	return snd_sb16_resume(pnp_get_card_drvdata(pcard));
}
#endif

static struct pnp_card_driver sb16_pnpc_driver = {
	.flags = PNP_DRIVER_RES_DISABLE,
#ifdef SNDRV_SBAWE
	.name = "sbawe",
#else
	.name = "sb16",
#endif
	.id_table = snd_sb16_pnpids,
	.probe = snd_sb16_pnp_detect,
	.remove = __devexit_p(snd_sb16_pnp_remove),
#ifdef CONFIG_PM
	.suspend = snd_sb16_pnp_suspend,
	.resume = snd_sb16_pnp_resume,
#endif
};

#endif /* CONFIG_PNP */

static void __init_or_module snd_sb16_unregister_all(void)
{
	int i;

#ifdef CONFIG_PNP
	if (pnp_registered)
		pnp_unregister_card_driver(&sb16_pnpc_driver);
#endif
	for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
		platform_device_unregister(platform_devices[i]);
	platform_driver_unregister(&snd_sb16_nonpnp_driver);
}

static int __init alsa_card_sb16_init(void)
{
	int i, err, cards = 0;

	if ((err = platform_driver_register(&snd_sb16_nonpnp_driver)) < 0)
		return err;

	for (i = 0; i < SNDRV_CARDS && enable[i]; i++) {
		struct platform_device *device;
		if (is_isapnp_selected(i))
			continue;
		device = platform_device_register_simple(SND_SB16_DRIVER,
							 i, NULL, 0);
		if (IS_ERR(device)) {
			err = PTR_ERR(device);
			goto errout;
		}
		platform_devices[i] = device;
		cards++;
	}
#ifdef CONFIG_PNP
	/* PnP cards at last */
	i = pnp_register_card_driver(&sb16_pnpc_driver);
	if (i >= 0) {
		pnp_registered = 1;
		cards += i;
	}
#endif

	if (!cards) {
#ifdef MODULE
		snd_printk(KERN_ERR "Sound Blaster 16 soundcard not found or device busy\n");
#ifdef SNDRV_SBAWE_EMU8000
		snd_printk(KERN_ERR "In case, if you have non-AWE card, try snd-sb16 module\n");
#else
		snd_printk(KERN_ERR "In case, if you have AWE card, try snd-sbawe module\n");
#endif
#endif
		err = -ENODEV;
		goto errout;
	}
	return 0;

 errout:
	snd_sb16_unregister_all();
	return err;
}

static void __exit alsa_card_sb16_exit(void)
{
	snd_sb16_unregister_all();
}

module_init(alsa_card_sb16_init)
module_exit(alsa_card_sb16_exit)