azt3328.c

linux 内核源代码

}

static irqreturn_t
snd_azf3328_interrupt(int irq, void *dev_id)
{
	struct snd_azf3328 *chip = dev_id;
	u8 status, which;
	static unsigned long irq_count;

	status = snd_azf3328_codec_inb(chip, IDX_IO_IRQSTATUS);

        /* fast path out, to ease interrupt sharing */
	if (!(status & (IRQ_PLAYBACK|IRQ_RECORDING|IRQ_MPU401|IRQ_TIMER)))
		return IRQ_NONE; /* must be interrupt for another device */

	snd_azf3328_dbgplay("Interrupt %ld!\nIDX_IO_PLAY_FLAGS %04x, IDX_IO_PLAY_IRQTYPE %04x, IDX_IO_IRQSTATUS %04x\n",
		irq_count,
		snd_azf3328_codec_inw(chip, IDX_IO_PLAY_FLAGS),
		snd_azf3328_codec_inw(chip, IDX_IO_PLAY_IRQTYPE),
		status);
		
	if (status & IRQ_TIMER) {
		/* snd_azf3328_dbgplay("timer %ld\n", inl(chip->codec_port+IDX_IO_TIMER_VALUE) & TIMER_VALUE_MASK); */
		if (chip->timer)
			snd_timer_interrupt(chip->timer, chip->timer->sticks);
		/* ACK timer */
                spin_lock(&chip->reg_lock);
		snd_azf3328_codec_outb(chip, IDX_IO_TIMER_VALUE + 3, 0x07);
		spin_unlock(&chip->reg_lock);
		snd_azf3328_dbgplay("azt3328: timer IRQ\n");
	}
	if (status & IRQ_PLAYBACK) {
		spin_lock(&chip->reg_lock);
		which = snd_azf3328_codec_inb(chip, IDX_IO_PLAY_IRQTYPE);
		/* ack all IRQ types immediately */
		snd_azf3328_codec_outb(chip, IDX_IO_PLAY_IRQTYPE, which);
               	spin_unlock(&chip->reg_lock);

		if (chip->pcm && chip->playback_substream) {
			snd_pcm_period_elapsed(chip->playback_substream);
			snd_azf3328_dbgplay("PLAY period done (#%x), @ %x\n",
				which,
				inl(chip->codec_port+IDX_IO_PLAY_DMA_CURRPOS));
		} else
			snd_azf3328_dbgplay("azt3328: ouch, irq handler problem!\n");
		if (which & IRQ_PLAY_SOMETHING)
			snd_azf3328_dbgplay("azt3328: unknown play IRQ type occurred, please report!\n");
	}
	if (status & IRQ_RECORDING) {
                spin_lock(&chip->reg_lock);
		which = snd_azf3328_codec_inb(chip, IDX_IO_REC_IRQTYPE);
		/* ack all IRQ types immediately */
		snd_azf3328_codec_outb(chip, IDX_IO_REC_IRQTYPE, which);
		spin_unlock(&chip->reg_lock);

		if (chip->pcm && chip->capture_substream) {
			snd_pcm_period_elapsed(chip->capture_substream);
			snd_azf3328_dbgplay("REC  period done (#%x), @ %x\n",
				which,
				inl(chip->codec_port+IDX_IO_REC_DMA_CURRPOS));
		} else
			snd_azf3328_dbgplay("azt3328: ouch, irq handler problem!\n");
		if (which & IRQ_REC_SOMETHING)
			snd_azf3328_dbgplay("azt3328: unknown rec IRQ type occurred, please report!\n");
	}
	/* MPU401 has less critical IRQ requirements
	 * than timer and playback/recording, right? */
	if (status & IRQ_MPU401) {
		snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);

		/* hmm, do we have to ack the IRQ here somehow?
		 * If so, then I don't know how... */
		snd_azf3328_dbgplay("azt3328: MPU401 IRQ\n");
	}
	irq_count++;
	return IRQ_HANDLED;
}

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

static const struct snd_pcm_hardware snd_azf3328_playback =
{
	/* FIXME!! Correct? */
	.info =			SNDRV_PCM_INFO_MMAP |
				SNDRV_PCM_INFO_INTERLEAVED |
				SNDRV_PCM_INFO_MMAP_VALID,
	.formats =		SNDRV_PCM_FMTBIT_S8 |
				SNDRV_PCM_FMTBIT_U8 |
				SNDRV_PCM_FMTBIT_S16_LE |
				SNDRV_PCM_FMTBIT_U16_LE,
	.rates =		SNDRV_PCM_RATE_5512 |
				SNDRV_PCM_RATE_8000_48000 |
				SNDRV_PCM_RATE_KNOT,
	.rate_min =		4000,
	.rate_max =		66200,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	/* FIXME: maybe that card actually has a FIFO?
	 * Hmm, it seems newer revisions do have one, but we still don't know
	 * its size... */
	.fifo_size =		0,
};

static const struct snd_pcm_hardware snd_azf3328_capture =
{
	/* FIXME */
	.info =			SNDRV_PCM_INFO_MMAP |
				SNDRV_PCM_INFO_INTERLEAVED |
				SNDRV_PCM_INFO_MMAP_VALID,
	.formats =		SNDRV_PCM_FMTBIT_S8 |
				SNDRV_PCM_FMTBIT_U8 |
				SNDRV_PCM_FMTBIT_S16_LE |
				SNDRV_PCM_FMTBIT_U16_LE,
	.rates =		SNDRV_PCM_RATE_5512 |
				SNDRV_PCM_RATE_8000_48000 |
				SNDRV_PCM_RATE_KNOT,
	.rate_min =		4000,
	.rate_max =		66200,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};


static unsigned int snd_azf3328_fixed_rates[] = {
	4000, 4800, 5512, 6620, 8000, 9600, 11025, 13240, 16000, 22050, 32000,
	44100, 48000, 66200 };
static struct snd_pcm_hw_constraint_list snd_azf3328_hw_constraints_rates = {
	.count = ARRAY_SIZE(snd_azf3328_fixed_rates), 
	.list = snd_azf3328_fixed_rates,
	.mask = 0,
};

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

static int
snd_azf3328_playback_open(struct snd_pcm_substream *substream)
{
	struct snd_azf3328 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;

	snd_azf3328_dbgcallenter();
	chip->playback_substream = substream;
	runtime->hw = snd_azf3328_playback;
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				   &snd_azf3328_hw_constraints_rates);
	snd_azf3328_dbgcallleave();
	return 0;
}

static int
snd_azf3328_capture_open(struct snd_pcm_substream *substream)
{
	struct snd_azf3328 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;

	snd_azf3328_dbgcallenter();
	chip->capture_substream = substream;
	runtime->hw = snd_azf3328_capture;
	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				   &snd_azf3328_hw_constraints_rates);
	snd_azf3328_dbgcallleave();
	return 0;
}

static int
snd_azf3328_playback_close(struct snd_pcm_substream *substream)
{
	struct snd_azf3328 *chip = snd_pcm_substream_chip(substream);

	snd_azf3328_dbgcallenter();
	chip->playback_substream = NULL;
	snd_azf3328_dbgcallleave();
	return 0;
}

static int
snd_azf3328_capture_close(struct snd_pcm_substream *substream)
{
	struct snd_azf3328 *chip = snd_pcm_substream_chip(substream);

	snd_azf3328_dbgcallenter();
	chip->capture_substream = NULL;
	snd_azf3328_dbgcallleave();
	return 0;
}

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

static struct snd_pcm_ops snd_azf3328_playback_ops = {
	.open =		snd_azf3328_playback_open,
	.close =	snd_azf3328_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_azf3328_hw_params,
	.hw_free =	snd_azf3328_hw_free,
	.prepare =	snd_azf3328_playback_prepare,
	.trigger =	snd_azf3328_playback_trigger,
	.pointer =	snd_azf3328_playback_pointer
};

static struct snd_pcm_ops snd_azf3328_capture_ops = {
	.open =		snd_azf3328_capture_open,
	.close =	snd_azf3328_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_azf3328_hw_params,
	.hw_free =	snd_azf3328_hw_free,
	.prepare =	snd_azf3328_capture_prepare,
	.trigger =	snd_azf3328_capture_trigger,
	.pointer =	snd_azf3328_capture_pointer
};

static int __devinit
snd_azf3328_pcm(struct snd_azf3328 *chip, int device)
{
	struct snd_pcm *pcm;
	int err;

	snd_azf3328_dbgcallenter();
	if ((err = snd_pcm_new(chip->card, "AZF3328 DSP", device, 1, 1, &pcm)) < 0)
		return err;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_azf3328_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_azf3328_capture_ops);

	pcm->private_data = chip;
	pcm->info_flags = 0;
	strcpy(pcm->name, chip->card->shortname);
	chip->pcm = pcm;

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

	snd_azf3328_dbgcallleave();
	return 0;
}

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

#ifdef SUPPORT_JOYSTICK
static int __devinit
snd_azf3328_config_joystick(struct snd_azf3328 *chip, int dev)
{
	struct gameport *gp;
	struct resource *r;

	if (!joystick[dev])
		return -ENODEV;

	if (!(r = request_region(0x200, 8, "AZF3328 gameport"))) {
		printk(KERN_WARNING "azt3328: cannot reserve joystick ports\n");
		return -EBUSY;
	}

	chip->gameport = gp = gameport_allocate_port();
	if (!gp) {
		printk(KERN_ERR "azt3328: cannot allocate memory for gameport\n");
		release_and_free_resource(r);
		return -ENOMEM;
	}

	gameport_set_name(gp, "AZF3328 Gameport");
	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
	gameport_set_dev_parent(gp, &chip->pci->dev);
	gp->io = 0x200;
	gameport_set_port_data(gp, r);

	snd_azf3328_io2_outb(chip, IDX_IO2_LEGACY_ADDR,
			      snd_azf3328_io2_inb(chip, IDX_IO2_LEGACY_ADDR) | LEGACY_JOY);

	gameport_register_port(chip->gameport);

	return 0;
}

static void
snd_azf3328_free_joystick(struct snd_azf3328 *chip)
{
	if (chip->gameport) {
		struct resource *r = gameport_get_port_data(chip->gameport);

		gameport_unregister_port(chip->gameport);
		chip->gameport = NULL;
		/* disable gameport */
		snd_azf3328_io2_outb(chip, IDX_IO2_LEGACY_ADDR,
				      snd_azf3328_io2_inb(chip, IDX_IO2_LEGACY_ADDR) & ~LEGACY_JOY);
		release_and_free_resource(r);
	}
}
#else
static inline int
snd_azf3328_config_joystick(struct snd_azf3328 *chip, int dev) { return -ENOSYS; }
static inline void
snd_azf3328_free_joystick(struct snd_azf3328 *chip) { }
#endif

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

static int
snd_azf3328_free(struct snd_azf3328 *chip)
{
        if (chip->irq < 0)
                goto __end_hw;

	/* reset (close) mixer */
	snd_azf3328_mixer_set_mute(chip, IDX_MIXER_PLAY_MASTER, 1); /* first mute master volume */
	snd_azf3328_mixer_outw(chip, IDX_MIXER_RESET, 0x0000);

        /* interrupt setup - mask everything (FIXME!) */
	/* well, at least we know how to disable the timer IRQ */
	snd_azf3328_codec_outb(chip, IDX_IO_TIMER_VALUE + 3, 0x00);

        synchronize_irq(chip->irq);
__end_hw:
	snd_azf3328_free_joystick(chip);
        if (chip->irq >= 0)
		free_irq(chip->irq, chip);
	pci_release_regions(chip->pci);
	pci_disable_device(chip->pci);

        kfree(chip);
        return 0;
}

static int
snd_azf3328_dev_free(struct snd_device *device)
{
	struct snd_azf3328 *chip = device->device_data;
	return snd_azf3328_free(chip);
}

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

/*** NOTE: the physical timer resolution actually is 1024000 ticks per second,
 *** but announcing those attributes to user-space would make programs
 *** configure the timer to a 1 tick value, resulting in an absolutely fatal
 *** timer IRQ storm.
 *** Thus I chose to announce a down-scaled virtual timer to the outside and
 *** calculate real timer countdown values internally.
 *** (the scale factor can be set via module parameter "seqtimer_scaling").
 ***/

static int
snd_azf3328_timer_start(struct snd_timer *timer)
{
	struct snd_azf3328 *chip;
	unsigned long flags;
	unsigned int delay;

	snd_azf3328_dbgcallenter();
	chip = snd_timer_chip(timer);
	delay = ((timer->sticks * seqtimer_scaling) - 1) & TIMER_VALUE_MASK;
	if (delay < 49) {
		/* uhoh, that's not good, since user-space won't know about
		 * this timing tweak
		 * (we need to do it to avoid a lockup, though) */

		snd_azf3328_dbgtimer("delay was too low (%d)!\n", delay);
		delay = 49; /* minimum time is 49 ticks */
	}
	snd_azf3328_dbgtimer("setting timer countdown value %d, add COUNTDOWN|IRQ\n", delay);
	delay |= TIMER_ENABLE_COUNTDOWN | TIMER_ENABLE_IRQ;
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_azf3328_codec_outl(chip, IDX_IO_TIMER_VALUE, delay);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	snd_azf3328_dbgcallleave();
	return 0;
}

static int
snd_azf3328_timer_stop(struct snd_timer *timer)
{
	struct snd_azf3328 *chip;
	unsigned long flags;

	snd_azf3328_dbgcallenter();
	chip = snd_timer_chip(timer);
	spin_lock_irqsave(&chip->reg_lock, flags);
	/* disable timer countdown and interrupt */
	/* FIXME: should we write TIMER_ACK_IRQ here? */
	snd_azf3328_codec_outb(chip, IDX_IO_TIMER_VALUE + 3, 0);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	snd_azf3328_dbgcallleave();
	return 0;
}


static int
snd_azf3328_timer_precise_resolution(struct snd_timer *timer,
					       unsigned long *num, unsigned long *den)
{