mts64.c

linux 内核源代码

	int idx = kctl->private_value;
	int changed = 0;

	spin_lock_irq(&mts->lock);
	if (mts->time[idx] != uctl->value.integer.value[0]) {
		changed = 1;
		mts->time[idx] = uctl->value.integer.value[0];
	}
	spin_unlock_irq(&mts->lock);

	return changed;
}

static struct snd_kcontrol_new mts64_ctl_smpte_time_hours __devinitdata = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Hours",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 0,
	.info = snd_mts64_ctl_smpte_time_h_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes __devinitdata = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Minutes",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 1,
	.info = snd_mts64_ctl_smpte_time_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds __devinitdata = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Seconds",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 2,
	.info = snd_mts64_ctl_smpte_time_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

static struct snd_kcontrol_new mts64_ctl_smpte_time_frames __devinitdata = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Frames",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 3,
	.info = snd_mts64_ctl_smpte_time_f_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

/* FPS */
static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
					struct snd_ctl_elem_info *uinfo)
{
	static char *texts[5] = { "24",
				  "25",
				  "29.97",
				  "30D",
				  "30"    };

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 5;
	if (uinfo->value.enumerated.item > 4)
		uinfo->value.enumerated.item = 4;
	strcpy(uinfo->value.enumerated.name,
	       texts[uinfo->value.enumerated.item]);
	
	return 0;
}

static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
				       struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);

	spin_lock_irq(&mts->lock);
	uctl->value.enumerated.item[0] = mts->fps;
	spin_unlock_irq(&mts->lock);

	return 0;
}

static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
				       struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);
	int changed = 0;

	spin_lock_irq(&mts->lock);
	if (mts->fps != uctl->value.enumerated.item[0]) {
		changed = 1;
		mts->fps = uctl->value.enumerated.item[0];
	}
	spin_unlock_irq(&mts->lock);

	return changed;
}

static struct snd_kcontrol_new mts64_ctl_smpte_fps __devinitdata = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Fps",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 0,
	.info  = snd_mts64_ctl_smpte_fps_info,
	.get   = snd_mts64_ctl_smpte_fps_get,
	.put   = snd_mts64_ctl_smpte_fps_put
};


static int __devinit snd_mts64_ctl_create(struct snd_card *card, 
					  struct mts64 *mts) 
{
	int err, i;
	static struct snd_kcontrol_new *control[] = {
		&mts64_ctl_smpte_switch,
		&mts64_ctl_smpte_time_hours,
		&mts64_ctl_smpte_time_minutes,
		&mts64_ctl_smpte_time_seconds,
		&mts64_ctl_smpte_time_frames,
		&mts64_ctl_smpte_fps,
	        NULL  };

	for (i = 0; control[i]; ++i) {
		err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
		if (err < 0) {
			snd_printd("Cannot create control: %s\n", 
				   control[i]->name);
			return err;
		}
	}

	return 0;
}

/*********************************************************************
 * Rawmidi
 *********************************************************************/
#define MTS64_MODE_INPUT_TRIGGERED 0x01

static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
{
	struct mts64 *mts = substream->rmidi->private_data;

	if (mts->open_count == 0) {
		/* We don't need a spinlock here, because this is just called 
		   if the device has not been opened before. 
		   So there aren't any IRQs from the device */
		mts64_device_open(mts);

		msleep(50);
	}
	++(mts->open_count);

	return 0;
}

static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
{
	struct mts64 *mts = substream->rmidi->private_data;
	unsigned long flags;

	--(mts->open_count);
	if (mts->open_count == 0) {
		/* We need the spinlock_irqsave here because we can still
		   have IRQs at this point */
		spin_lock_irqsave(&mts->lock, flags);
		mts64_device_close(mts);
		spin_unlock_irqrestore(&mts->lock, flags);

		msleep(500);

	} else if (mts->open_count < 0)
		mts->open_count = 0;

	return 0;
}

static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
					     int up)
{
	struct mts64 *mts = substream->rmidi->private_data;
	u8 data;
	unsigned long flags;

	spin_lock_irqsave(&mts->lock, flags);
	while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
		mts64_write_midi(mts, data, substream->number+1);
		snd_rawmidi_transmit_ack(substream, 1);
	}
	spin_unlock_irqrestore(&mts->lock, flags);
}

static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
					    int up)
{
	struct mts64 *mts = substream->rmidi->private_data;
	unsigned long flags;

	spin_lock_irqsave(&mts->lock, flags);
	if (up)
		mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
	else
 		mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
	
	spin_unlock_irqrestore(&mts->lock, flags);
}

static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
	.open    = snd_mts64_rawmidi_open,
	.close   = snd_mts64_rawmidi_close,
	.trigger = snd_mts64_rawmidi_output_trigger
};

static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
	.open    = snd_mts64_rawmidi_open,
	.close   = snd_mts64_rawmidi_close,
	.trigger = snd_mts64_rawmidi_input_trigger
};

/* Create and initialize the rawmidi component */
static int __devinit snd_mts64_rawmidi_create(struct snd_card *card)
{
	struct mts64 *mts = card->private_data;
	struct snd_rawmidi *rmidi;
	struct snd_rawmidi_substream *substream;
	struct list_head *list;
	int err;
	
	err = snd_rawmidi_new(card, CARD_NAME, 0, 
			      MTS64_NUM_OUTPUT_PORTS, 
			      MTS64_NUM_INPUT_PORTS, 
			      &rmidi);
	if (err < 0) 
		return err;

	rmidi->private_data = mts;
	strcpy(rmidi->name, CARD_NAME);
	rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
		            SNDRV_RAWMIDI_INFO_INPUT |
                            SNDRV_RAWMIDI_INFO_DUPLEX;

	mts->rmidi = rmidi;

	/* register rawmidi ops */
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 
			    &snd_mts64_rawmidi_output_ops);
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 
			    &snd_mts64_rawmidi_input_ops);

	/* name substreams */
	/* output */
	list_for_each(list, 
		      &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
		substream = list_entry(list, struct snd_rawmidi_substream, list);
		sprintf(substream->name,
			"Miditerminal %d", substream->number+1);
	}
	/* input */
	list_for_each(list, 
		      &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
		substream = list_entry(list, struct snd_rawmidi_substream, list);
		mts->midi_input_substream[substream->number] = substream;
		switch(substream->number) {
		case MTS64_SMPTE_SUBSTREAM:
			strcpy(substream->name, "Miditerminal SMPTE");
			break;
		default:
			sprintf(substream->name,
				"Miditerminal %d", substream->number+1);
		}
	}

	/* controls */
	err = snd_mts64_ctl_create(card, mts);

	return err;
}

/*********************************************************************
 * parport stuff
 *********************************************************************/
static void snd_mts64_interrupt(void *private)
{
	struct mts64 *mts = ((struct snd_card*)private)->private_data;
	u16 ret;
	u8 status, data;
	struct snd_rawmidi_substream *substream;

	spin_lock(&mts->lock);
	ret = mts64_read(mts->pardev->port);
	data = ret & 0x00ff;
	status = ret >> 8;

	if (status & MTS64_STAT_PORT) {
		mts->current_midi_input_port = mts64_map_midi_input(data);
	} else {
		if (mts->current_midi_input_port == -1) 
			goto __out;
		substream = mts->midi_input_substream[mts->current_midi_input_port];
		if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
			snd_rawmidi_receive(substream, &data, 1);
	}
__out:
	spin_unlock(&mts->lock);
}

static int __devinit snd_mts64_probe_port(struct parport *p)
{
	struct pardevice *pardev;
	int res;

	pardev = parport_register_device(p, DRIVER_NAME,
					 NULL, NULL, NULL,
					 0, NULL);
	if (!pardev)
		return -EIO;
	
	if (parport_claim(pardev)) {
		parport_unregister_device(pardev);
		return -EIO;
	}

	res = mts64_probe(p);

	parport_release(pardev);
	parport_unregister_device(pardev);

	return res;
}

static void __devinit snd_mts64_attach(struct parport *p)
{
	struct platform_device *device;

	device = platform_device_alloc(PLATFORM_DRIVER, device_count);
	if (!device)
		return;

	/* Temporary assignment to forward the parport */
	platform_set_drvdata(device, p);

	if (platform_device_add(device) < 0) {
		platform_device_put(device);
		return;
	}

	/* Since we dont get the return value of probe
	 * We need to check if device probing succeeded or not */
	if (!platform_get_drvdata(device)) {
		platform_device_unregister(device);
		return;
	}

	/* register device in global table */
	platform_devices[device_count] = device;
	device_count++;
}

static void snd_mts64_detach(struct parport *p)
{
	/* nothing to do here */
}

static struct parport_driver mts64_parport_driver = {
	.name   = "mts64",
	.attach = snd_mts64_attach,
	.detach = snd_mts64_detach
};

/*********************************************************************
 * platform stuff
 *********************************************************************/
static void snd_mts64_card_private_free(struct snd_card *card)
{
	struct mts64 *mts = card->private_data;
	struct pardevice *pardev = mts->pardev;

	if (pardev) {
		if (mts->pardev_claimed)
			parport_release(pardev);
		parport_unregister_device(pardev);
	}

	snd_mts64_free(mts);
}

static int __devinit snd_mts64_probe(struct platform_device *pdev)
{
	struct pardevice *pardev;
	struct parport *p;
	int dev = pdev->id;
	struct snd_card *card = NULL;
	struct mts64 *mts = NULL;
	int err;

	p = platform_get_drvdata(pdev);
	platform_set_drvdata(pdev, NULL);

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) 
		return -ENOENT;
	if ((err = snd_mts64_probe_port(p)) < 0)
		return err;

	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
	if (card == NULL) {
		snd_printd("Cannot create card\n");
		return -ENOMEM;
	}
	strcpy(card->driver, DRIVER_NAME);
	strcpy(card->shortname, "ESI " CARD_NAME);
	sprintf(card->longname,  "%s at 0x%lx, irq %i", 
		card->shortname, p->base, p->irq);

	pardev = parport_register_device(p,                   /* port */
					 DRIVER_NAME,         /* name */
					 NULL,                /* preempt */
					 NULL,                /* wakeup */
					 snd_mts64_interrupt, /* ISR */
					 PARPORT_DEV_EXCL,    /* flags */
					 (void *)card);       /* private */
	if (pardev == NULL) {
		snd_printd("Cannot register pardevice\n");
		err = -EIO;
		goto __err;
	}

	if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
		snd_printd("Cannot create main component\n");
		parport_unregister_device(pardev);
		goto __err;
	}
	card->private_data = mts;
	card->private_free = snd_mts64_card_private_free;
	
	if ((err = snd_mts64_rawmidi_create(card)) < 0) {
		snd_printd("Creating Rawmidi component failed\n");
		goto __err;
	}

	/* claim parport */
	if (parport_claim(pardev)) {
		snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
		err = -EIO;
		goto __err;
	}
	mts->pardev_claimed = 1;

	/* init device */
	if ((err = mts64_device_init(p)) < 0)
		goto __err;

	platform_set_drvdata(pdev, card);

	/* At this point card will be usable */
	if ((err = snd_card_register(card)) < 0) {
		snd_printd("Cannot register card\n");
		goto __err;
	}

	snd_printk("ESI Miditerminal 4140 on 0x%lx\n", p->base);
	return 0;

__err:
	snd_card_free(card);
	return err;
}

static int __devexit snd_mts64_remove(struct platform_device *pdev)
{
	struct snd_card *card = platform_get_drvdata(pdev);

	if (card)
		snd_card_free(card);

	return 0;
}


static struct platform_driver snd_mts64_driver = {
	.probe  = snd_mts64_probe,
	.remove = __devexit_p(snd_mts64_remove),
	.driver = {
		.name = PLATFORM_DRIVER
	}
};

/*********************************************************************
 * module init stuff
 *********************************************************************/
static void snd_mts64_unregister_all(void)
{
	int i;

	for (i = 0; i < SNDRV_CARDS; ++i) {
		if (platform_devices[i]) {
			platform_device_unregister(platform_devices[i]);
			platform_devices[i] = NULL;
		}
	}		
	platform_driver_unregister(&snd_mts64_driver);
	parport_unregister_driver(&mts64_parport_driver);
}

static int __init snd_mts64_module_init(void)
{
	int err;

	if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
		return err;

	if (parport_register_driver(&mts64_parport_driver) != 0) {
		platform_driver_unregister(&snd_mts64_driver);
		return -EIO;
	}

	if (device_count == 0) {
		snd_mts64_unregister_all();
		return -ENODEV;
	}

	return 0;
}

static void __exit snd_mts64_module_exit(void)
{
	snd_mts64_unregister_all();
}

module_init(snd_mts64_module_init);
module_exit(snd_mts64_module_exit);