rme32.c

linux 内核源代码

	rme32->playback_periodsize = 0;
	spdif = (rme32->wcreg & RME32_WCR_ADAT) == 0;
	spin_unlock_irq(&rme32->lock);
	if (spdif) {
		rme32->spdif_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
		snd_ctl_notify(rme32->card, SNDRV_CTL_EVENT_MASK_VALUE |
			       SNDRV_CTL_EVENT_MASK_INFO,
			       &rme32->spdif_ctl->id);
	}
	return 0;
}

static int snd_rme32_capture_close(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

	spin_lock_irq(&rme32->lock);
	rme32->capture_substream = NULL;
	rme32->capture_periodsize = 0;
	spin_unlock(&rme32->lock);
	return 0;
}

static int snd_rme32_playback_prepare(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

	spin_lock_irq(&rme32->lock);
	if (rme32->fullduplex_mode) {
		memset(&rme32->playback_pcm, 0, sizeof(rme32->playback_pcm));
		rme32->playback_pcm.hw_buffer_size = RME32_BUFFER_SIZE;
		rme32->playback_pcm.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
	} else {
		writel(0, rme32->iobase + RME32_IO_RESET_POS);
	}
	if (rme32->wcreg & RME32_WCR_SEL)
		rme32->wcreg &= ~RME32_WCR_MUTE;
	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);
	spin_unlock_irq(&rme32->lock);
	return 0;
}

static int snd_rme32_capture_prepare(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);

	spin_lock_irq(&rme32->lock);
	if (rme32->fullduplex_mode) {
		memset(&rme32->capture_pcm, 0, sizeof(rme32->capture_pcm));
		rme32->capture_pcm.hw_buffer_size = RME32_BUFFER_SIZE;
		rme32->capture_pcm.hw_queue_size = RME32_BUFFER_SIZE / 2;
		rme32->capture_pcm.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
	} else {
		writel(0, rme32->iobase + RME32_IO_RESET_POS);
	}
	spin_unlock_irq(&rme32->lock);
	return 0;
}

static int
snd_rme32_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	struct snd_pcm_substream *s;

	spin_lock(&rme32->lock);
	snd_pcm_group_for_each_entry(s, substream) {
		if (s != rme32->playback_substream &&
		    s != rme32->capture_substream)
			continue;
		switch (cmd) {
		case SNDRV_PCM_TRIGGER_START:
			rme32->running |= (1 << s->stream);
			if (rme32->fullduplex_mode) {
				/* remember the current DMA position */
				if (s == rme32->playback_substream) {
					rme32->playback_pcm.hw_io =
					rme32->playback_pcm.hw_data = snd_rme32_pcm_byteptr(rme32);
				} else {
					rme32->capture_pcm.hw_io =
					rme32->capture_pcm.hw_data = snd_rme32_pcm_byteptr(rme32);
				}
			}
			break;
		case SNDRV_PCM_TRIGGER_STOP:
			rme32->running &= ~(1 << s->stream);
			break;
		}
		snd_pcm_trigger_done(s, substream);
	}
	
	/* prefill playback buffer */
	if (cmd == SNDRV_PCM_TRIGGER_START && rme32->fullduplex_mode) {
		snd_pcm_group_for_each_entry(s, substream) {
			if (s == rme32->playback_substream) {
				s->ops->ack(s);
				break;
			}
		}
	}

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		if (rme32->running && ! RME32_ISWORKING(rme32))
			snd_rme32_pcm_start(rme32, 0);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		if (! rme32->running && RME32_ISWORKING(rme32))
			snd_rme32_pcm_stop(rme32, 0);
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		if (rme32->running && RME32_ISWORKING(rme32))
			snd_rme32_pcm_stop(rme32, 1);
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		if (rme32->running && ! RME32_ISWORKING(rme32))
			snd_rme32_pcm_start(rme32, 1);
		break;
	}
	spin_unlock(&rme32->lock);
	return 0;
}

/* pointer callback for halfduplex mode */
static snd_pcm_uframes_t
snd_rme32_playback_pointer(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	return snd_rme32_pcm_byteptr(rme32) >> rme32->playback_frlog;
}

static snd_pcm_uframes_t
snd_rme32_capture_pointer(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	return snd_rme32_pcm_byteptr(rme32) >> rme32->capture_frlog;
}


/* ack and pointer callbacks for fullduplex mode */
static void snd_rme32_pb_trans_copy(struct snd_pcm_substream *substream,
				    struct snd_pcm_indirect *rec, size_t bytes)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	memcpy_toio(rme32->iobase + RME32_IO_DATA_BUFFER + rec->hw_data,
		    substream->runtime->dma_area + rec->sw_data, bytes);
}

static int snd_rme32_playback_fd_ack(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	struct snd_pcm_indirect *rec, *cprec;

	rec = &rme32->playback_pcm;
	cprec = &rme32->capture_pcm;
	spin_lock(&rme32->lock);
	rec->hw_queue_size = RME32_BUFFER_SIZE;
	if (rme32->running & (1 << SNDRV_PCM_STREAM_CAPTURE))
		rec->hw_queue_size -= cprec->hw_ready;
	spin_unlock(&rme32->lock);
	snd_pcm_indirect_playback_transfer(substream, rec,
					   snd_rme32_pb_trans_copy);
	return 0;
}

static void snd_rme32_cp_trans_copy(struct snd_pcm_substream *substream,
				    struct snd_pcm_indirect *rec, size_t bytes)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	memcpy_fromio(substream->runtime->dma_area + rec->sw_data,
		      rme32->iobase + RME32_IO_DATA_BUFFER + rec->hw_data,
		      bytes);
}

static int snd_rme32_capture_fd_ack(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	snd_pcm_indirect_capture_transfer(substream, &rme32->capture_pcm,
					  snd_rme32_cp_trans_copy);
	return 0;
}

static snd_pcm_uframes_t
snd_rme32_playback_fd_pointer(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	return snd_pcm_indirect_playback_pointer(substream, &rme32->playback_pcm,
						 snd_rme32_pcm_byteptr(rme32));
}

static snd_pcm_uframes_t
snd_rme32_capture_fd_pointer(struct snd_pcm_substream *substream)
{
	struct rme32 *rme32 = snd_pcm_substream_chip(substream);
	return snd_pcm_indirect_capture_pointer(substream, &rme32->capture_pcm,
						snd_rme32_pcm_byteptr(rme32));
}

/* for halfduplex mode */
static struct snd_pcm_ops snd_rme32_playback_spdif_ops = {
	.open =		snd_rme32_playback_spdif_open,
	.close =	snd_rme32_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_playback_hw_params,
	.hw_free =	snd_rme32_pcm_hw_free,
	.prepare =	snd_rme32_playback_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_playback_pointer,
	.copy =		snd_rme32_playback_copy,
	.silence =	snd_rme32_playback_silence,
	.mmap =		snd_pcm_lib_mmap_iomem,
};

static struct snd_pcm_ops snd_rme32_capture_spdif_ops = {
	.open =		snd_rme32_capture_spdif_open,
	.close =	snd_rme32_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_capture_hw_params,
	.hw_free =	snd_rme32_pcm_hw_free,
	.prepare =	snd_rme32_capture_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_capture_pointer,
	.copy =		snd_rme32_capture_copy,
	.mmap =		snd_pcm_lib_mmap_iomem,
};

static struct snd_pcm_ops snd_rme32_playback_adat_ops = {
	.open =		snd_rme32_playback_adat_open,
	.close =	snd_rme32_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_playback_hw_params,
	.prepare =	snd_rme32_playback_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_playback_pointer,
	.copy =		snd_rme32_playback_copy,
	.silence =	snd_rme32_playback_silence,
	.mmap =		snd_pcm_lib_mmap_iomem,
};

static struct snd_pcm_ops snd_rme32_capture_adat_ops = {
	.open =		snd_rme32_capture_adat_open,
	.close =	snd_rme32_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_capture_hw_params,
	.prepare =	snd_rme32_capture_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_capture_pointer,
	.copy =		snd_rme32_capture_copy,
	.mmap =		snd_pcm_lib_mmap_iomem,
};

/* for fullduplex mode */
static struct snd_pcm_ops snd_rme32_playback_spdif_fd_ops = {
	.open =		snd_rme32_playback_spdif_open,
	.close =	snd_rme32_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_playback_hw_params,
	.hw_free =	snd_rme32_pcm_hw_free,
	.prepare =	snd_rme32_playback_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_playback_fd_pointer,
	.ack =		snd_rme32_playback_fd_ack,
};

static struct snd_pcm_ops snd_rme32_capture_spdif_fd_ops = {
	.open =		snd_rme32_capture_spdif_open,
	.close =	snd_rme32_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_capture_hw_params,
	.hw_free =	snd_rme32_pcm_hw_free,
	.prepare =	snd_rme32_capture_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_capture_fd_pointer,
	.ack =		snd_rme32_capture_fd_ack,
};

static struct snd_pcm_ops snd_rme32_playback_adat_fd_ops = {
	.open =		snd_rme32_playback_adat_open,
	.close =	snd_rme32_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_playback_hw_params,
	.prepare =	snd_rme32_playback_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_playback_fd_pointer,
	.ack =		snd_rme32_playback_fd_ack,
};

static struct snd_pcm_ops snd_rme32_capture_adat_fd_ops = {
	.open =		snd_rme32_capture_adat_open,
	.close =	snd_rme32_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_rme32_capture_hw_params,
	.prepare =	snd_rme32_capture_prepare,
	.trigger =	snd_rme32_pcm_trigger,
	.pointer =	snd_rme32_capture_fd_pointer,
	.ack =		snd_rme32_capture_fd_ack,
};

static void snd_rme32_free(void *private_data)
{
	struct rme32 *rme32 = (struct rme32 *) private_data;

	if (rme32 == NULL) {
		return;
	}
	if (rme32->irq >= 0) {
		snd_rme32_pcm_stop(rme32, 0);
		free_irq(rme32->irq, (void *) rme32);
		rme32->irq = -1;
	}
	if (rme32->iobase) {
		iounmap(rme32->iobase);
		rme32->iobase = NULL;
	}
	if (rme32->port) {
		pci_release_regions(rme32->pci);
		rme32->port = 0;
	}
	pci_disable_device(rme32->pci);
}

static void snd_rme32_free_spdif_pcm(struct snd_pcm *pcm)
{
	struct rme32 *rme32 = (struct rme32 *) pcm->private_data;
	rme32->spdif_pcm = NULL;
}

static void
snd_rme32_free_adat_pcm(struct snd_pcm *pcm)
{
	struct rme32 *rme32 = (struct rme32 *) pcm->private_data;
	rme32->adat_pcm = NULL;
}

static int __devinit snd_rme32_create(struct rme32 * rme32)
{
	struct pci_dev *pci = rme32->pci;
	int err;

	rme32->irq = -1;
	spin_lock_init(&rme32->lock);

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

	if ((err = pci_request_regions(pci, "RME32")) < 0)
		return err;
	rme32->port = pci_resource_start(rme32->pci, 0);

	if ((rme32->iobase = ioremap_nocache(rme32->port, RME32_IO_SIZE)) == 0) {
		snd_printk(KERN_ERR "unable to remap memory region 0x%lx-0x%lx\n",
			   rme32->port, rme32->port + RME32_IO_SIZE - 1);
		return -ENOMEM;
	}

	if (request_irq(pci->irq, snd_rme32_interrupt, IRQF_SHARED,
			"RME32", rme32)) {
		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
		return -EBUSY;
	}
	rme32->irq = pci->irq;

	/* read the card's revision number */
	pci_read_config_byte(pci, 8, &rme32->rev);

	/* set up ALSA pcm device for S/PDIF */
	if ((err = snd_pcm_new(rme32->card, "Digi32 IEC958", 0, 1, 1, &rme32->spdif_pcm)) < 0) {
		return err;
	}
	rme32->spdif_pcm->private_data = rme32;
	rme32->spdif_pcm->private_free = snd_rme32_free_spdif_pcm;
	strcpy(rme32->spdif_pcm->name, "Digi32 IEC958");
	if (rme32->fullduplex_mode) {
		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_PLAYBACK,
				&snd_rme32_playback_spdif_fd_ops);
		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_CAPTURE,
				&snd_rme32_capture_spdif_fd_ops);
		snd_pcm_lib_preallocate_pages_for_all(rme32->spdif_pcm, SNDRV_DMA_TYPE_CONTINUOUS,
						      snd_dma_continuous_data(GFP_KERNEL),
						      0, RME32_MID_BUFFER_SIZE);
		rme32->spdif_pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
	} else {
		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_PLAYBACK,
				&snd_rme32_playback_spdif_ops);
		snd_pcm_set_ops(rme32->spdif_pcm, SNDRV_PCM_STREAM_CAPTURE,
				&snd_rme32_capture_spdif_ops);
		rme32->spdif_pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
	}

	/* set up ALSA pcm device for ADAT */
	if ((pci->device == PCI_DEVICE_ID_RME_DIGI32) ||
	    (pci->device == PCI_DEVICE_ID_RME_DIGI32_PRO)) {
		/* ADAT is not available on DIGI32 and DIGI32 Pro */
		rme32->adat_pcm = NULL;
	}
	else {
		if ((err = snd_pcm_new(rme32->card, "Digi32 ADAT", 1,
				       1, 1, &rme32->adat_pcm)) < 0)
		{
			return err;
		}		
		rme32->adat_pcm->private_data = rme32;
		rme32->adat_pcm->private_free = snd_rme32_free_adat_pcm;
		strcpy(rme32->adat_pcm->name, "Digi32 ADAT");
		if (rme32->fullduplex_mode) {
			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_PLAYBACK, 
					&snd_rme32_playback_adat_fd_ops);
			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_CAPTURE, 
					&snd_rme32_capture_adat_fd_ops);
			snd_pcm_lib_preallocate_pages_for_all(rme32->adat_pcm, SNDRV_DMA_TYPE_CONTINUOUS,
							      snd_dma_continuous_data(GFP_KERNEL),
							      0, RME32_MID_BUFFER_SIZE);
			rme32->adat_pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
		} else {
			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_PLAYBACK, 
					&snd_rme32_playback_adat_ops);
			snd_pcm_set_ops(rme32->adat_pcm, SNDRV_PCM_STREAM_CAPTURE, 
					&snd_rme32_capture_adat_ops);
			rme32->adat_pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
		}
	}


	rme32->playback_periodsize = 0;
	rme32->capture_periodsize = 0;

	/* make sure playback/capture is stopped, if by some reason active */
	snd_rme32_pcm_stop(rme32, 0);

        /* reset DAC */
        snd_rme32_reset_dac(rme32);

	/* reset buffer pointer */
	writel(0, rme32->iobase + RME32_IO_RESET_POS);

	/* set default values in registers */
	rme32->wcreg = RME32_WCR_SEL |	 /* normal playback */
		RME32_WCR_INP_0 | /* input select */
		RME32_WCR_MUTE;	 /* muting on */
	writel(rme32->wcreg, rme32->iobase + RME32_IO_CONTROL_REGISTER);


	/* init switch interface */
	if ((err = snd_rme32_create_switches(rme32->card, rme32)) < 0) {
		return err;
	}

	/* init proc interface */
	snd_rme32_proc_init(rme32);

	rme32->capture_substream = NULL;
	rme32->playback_substream = NULL;

	return 0;
}

/*
 * proc interface
 */

static void
snd_rme32_proc_read(struct snd_info_entry * entry, struct snd_info_buffer *buffer)
{
	int n;
	struct rme32 *rme32 = (struct rme32 *) entry->private_data;

	rme32->rcreg = readl(rme32->iobase + RME32_IO_CONTROL_REGISTER);

	snd_iprintf(buffer, rme32->card->longname);
	snd_iprintf(buffer, " (index #%d)\n", rme32->card->number + 1);

	snd_iprintf(buffer, "\nGeneral settings\n");
	if (rme32->fullduplex_mode)
		snd_iprintf(buffer, "  Full-duplex mode\n");
	else
		snd_iprintf(buffer, "  Half-duplex mode\n");
	if (RME32_PRO_WITH_8414(rme32)) {
		snd_iprintf(buffer, "  receiver: CS8414\n");
	} else {
		snd_iprintf(buffer, "  receiver: CS8412\n");
	}
	if (rme32->wcreg & RME32_WCR_MODE24) {
		snd_iprintf(buffer, "  format: 24 bit");
	} else {
		snd_iprintf(buffer, "  format: 16 bit");
	}
	if (rme32->wcreg & RME32_WCR_MONO) {
		snd_iprintf(buffer, ", Mono\n");
	} else {
		snd_iprintf(buffer, ", Stereo\n");
	}

	snd_iprintf(buffer, "\nInput settings\n");
	switch (snd_rme32_getinputtype(rme32)) {
	case RME32_INPUT_OPTICAL:
		snd_iprintf(buffer, "  input: optical");
		break;
	case RME32_INPUT_COAXIAL:
		snd_iprintf(buffer, "  input: coaxial");
		break;
	case RME32_INPUT_INTERNAL:
		snd_iprintf(buffer, "  input: internal");