sound/firewire/motu/motu.c - kernel/msm-5.4 - Gitiles

 /*
  * motu.c - a part of driver for MOTU FireWire series
  *
  * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
  *
  * Licensed under the terms of the GNU General Public License, version 2.
  */

 #include "motu.h"

 #define OUI_MOTU	0x0001f2

 MODULE_DESCRIPTION("MOTU FireWire driver");
 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
 MODULE_LICENSE("GPL v2");

 const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT] = {
 	/* mode 0 */
 	[0] =  44100,
 	[1] =  48000,
 	/* mode 1 */
 	[2] =  88200,
 	[3] =  96000,
 	/* mode 2 */
 	[4] = 176400,
 	[5] = 192000,
 };

 static void name_card(struct snd_motu *motu)
 {
 	struct fw_device *fw_dev = fw_parent_device(motu->unit);
 	struct fw_csr_iterator it;
 	int key, val;
 	u32 version = 0;

 	fw_csr_iterator_init(&it, motu->unit->directory);
 	while (fw_csr_iterator_next(&it, &key, &val)) {
 		switch (key) {
 		case CSR_VERSION:
 			version = val;
 			break;
 		}
 	}

 	strcpy(motu->card->driver, "FW-MOTU");
 	strcpy(motu->card->shortname, motu->spec->name);
 	strcpy(motu->card->mixername, motu->spec->name);
 	snprintf(motu->card->longname, sizeof(motu->card->longname),
 		 "MOTU %s (version:%d), GUID %08x%08x at %s, S%d",
 		 motu->spec->name, version,
 		 fw_dev->config_rom[3], fw_dev->config_rom[4],
 		 dev_name(&motu->unit->device), 100 << fw_dev->max_speed);
 }

 static void motu_free(struct snd_motu *motu)
 {
 	snd_motu_transaction_unregister(motu);

 	snd_motu_stream_destroy_duplex(motu);
 	fw_unit_put(motu->unit);

 	mutex_destroy(&motu->mutex);
 	kfree(motu);
 }

 /*
  * This module releases the FireWire unit data after all ALSA character devices
  * are released by applications. This is for releasing stream data or finishing
  * transactions safely. Thus at returning from .remove(), this module still keep
  * references for the unit.
  */
 static void motu_card_free(struct snd_card *card)
 {
 	motu_free(card->private_data);
 }

 static void do_registration(struct work_struct *work)
 {
 	struct snd_motu *motu = container_of(work, struct snd_motu, dwork.work);
 	int err;

 	if (motu->registered)
 		return;

 	err = snd_card_new(&motu->unit->device, -1, NULL, THIS_MODULE, 0,
 			   &motu->card);
 	if (err < 0)
 		return;

 	name_card(motu);

 	err = snd_motu_transaction_register(motu);
 	if (err < 0)
 		goto error;

 	err = snd_motu_stream_init_duplex(motu);
 	if (err < 0)
 		goto error;

 	snd_motu_proc_init(motu);

 	err = snd_motu_create_pcm_devices(motu);
 	if (err < 0)
 		goto error;

 	if (motu->spec->flags & SND_MOTU_SPEC_HAS_MIDI) {
 		err = snd_motu_create_midi_devices(motu);
 		if (err < 0)
 			goto error;
 	}

 	err = snd_motu_create_hwdep_device(motu);
 	if (err < 0)
 		goto error;

 	err = snd_card_register(motu->card);
 	if (err < 0)
 		goto error;

 	/*
 	 * After registered, motu instance can be released corresponding to
 	 * releasing the sound card instance.
 	 */
 	motu->card->private_free = motu_card_free;
 	motu->card->private_data = motu;
 	motu->registered = true;

 	return;
 error:
 	snd_motu_transaction_unregister(motu);
 	snd_card_free(motu->card);
 	dev_info(&motu->unit->device,
 		 "Sound card registration failed: %d\n", err);
 }

 static int motu_probe(struct fw_unit *unit,
 		      const struct ieee1394_device_id *entry)
 {
 	struct snd_motu *motu;

 	/* Allocate this independently of sound card instance. */
 	motu = kzalloc(sizeof(struct snd_motu), GFP_KERNEL);
 	if (motu == NULL)
 		return -ENOMEM;

 	motu->spec = (const struct snd_motu_spec *)entry->driver_data;
 	motu->unit = fw_unit_get(unit);
 	dev_set_drvdata(&unit->device, motu);

 	mutex_init(&motu->mutex);
 	spin_lock_init(&motu->lock);
 	init_waitqueue_head(&motu->hwdep_wait);

 	/* Allocate and register this sound card later. */
 	INIT_DEFERRABLE_WORK(&motu->dwork, do_registration);
 	snd_fw_schedule_registration(unit, &motu->dwork);

 	return 0;
 }

 static void motu_remove(struct fw_unit *unit)
 {
 	struct snd_motu *motu = dev_get_drvdata(&unit->device);

 	/*
 	 * Confirm to stop the work for registration before the sound card is
 	 * going to be released. The work is not scheduled again because bus
 	 * reset handler is not called anymore.
 	 */
 	cancel_delayed_work_sync(&motu->dwork);

 	if (motu->registered) {
 		/* No need to wait for releasing card object in this context. */
 		snd_card_free_when_closed(motu->card);
 	} else {
 		/* Don't forget this case. */
 		motu_free(motu);
 	}
 }

 static void motu_bus_update(struct fw_unit *unit)
 {
 	struct snd_motu *motu = dev_get_drvdata(&unit->device);

 	/* Postpone a workqueue for deferred registration. */
 	if (!motu->registered)
 		snd_fw_schedule_registration(unit, &motu->dwork);

 	/* The handler address register becomes initialized. */
 	snd_motu_transaction_reregister(motu);
 }

 static struct snd_motu_spec motu_828mk2 = {
 	.name = "828mk2",
 	.protocol = &snd_motu_protocol_v2,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
 		 SND_MOTU_SPEC_TX_RETURN_CHUNK |
 		 SND_MOTU_SPEC_HAS_OPT_IFACE_A |
 		 SND_MOTU_SPEC_HAS_MIDI,

 	.analog_in_ports = 8,
 	.analog_out_ports = 8,
 };

 static struct snd_motu_spec motu_828mk3 = {
 	.name = "828mk3",
 	.protocol = &snd_motu_protocol_v3,
 	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 |
 		 SND_MOTU_SPEC_SUPPORT_CLOCK_X4 |
 		 SND_MOTU_SPEC_TX_MICINST_CHUNK |
 		 SND_MOTU_SPEC_TX_RETURN_CHUNK |
 		 SND_MOTU_SPEC_TX_REVERB_CHUNK |
 		 SND_MOTU_SPEC_HAS_OPT_IFACE_A |
 		 SND_MOTU_SPEC_HAS_OPT_IFACE_B |
 		 SND_MOTU_SPEC_HAS_MIDI,

 	.analog_in_ports = 8,
 	.analog_out_ports = 8,
 };

 #define SND_MOTU_DEV_ENTRY(model, data)			\
 {							\
 	.match_flags	= IEEE1394_MATCH_VENDOR_ID |	\
 			  IEEE1394_MATCH_MODEL_ID |	\
 			  IEEE1394_MATCH_SPECIFIER_ID,	\
 	.vendor_id	= OUI_MOTU,			\
 	.model_id	= model,			\
 	.specifier_id	= OUI_MOTU,			\
 	.driver_data	= (kernel_ulong_t)data,		\
 }

 static const struct ieee1394_device_id motu_id_table[] = {
 	SND_MOTU_DEV_ENTRY(0x101800, &motu_828mk2),
 	SND_MOTU_DEV_ENTRY(0x106800, &motu_828mk3),	/* FireWire only. */
 	SND_MOTU_DEV_ENTRY(0x100800, &motu_828mk3),	/* Hybrid. */
 	{ }
 };
 MODULE_DEVICE_TABLE(ieee1394, motu_id_table);

 static struct fw_driver motu_driver = {
 	.driver   = {
 		.owner	= THIS_MODULE,
 		.name	= KBUILD_MODNAME,
 		.bus	= &fw_bus_type,
 	},
 	.probe    = motu_probe,
 	.update   = motu_bus_update,
 	.remove   = motu_remove,
 	.id_table = motu_id_table,
 };

 static int __init alsa_motu_init(void)
 {
 	return driver_register(&motu_driver.driver);
 }

 static void __exit alsa_motu_exit(void)
 {
 	driver_unregister(&motu_driver.driver);
 }

 module_init(alsa_motu_init);
 module_exit(alsa_motu_exit);
	/*
	* motu.c - a part of driver for MOTU FireWire series
	*
	* Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
	*
	* Licensed under the terms of the GNU General Public License, version 2.
	*/

	#include "motu.h"

	#define OUI_MOTU 0x0001f2

	MODULE_DESCRIPTION("MOTU FireWire driver");
	MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
	MODULE_LICENSE("GPL v2");

	const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT] = {
	/* mode 0 */
	[0] = 44100,
	[1] = 48000,
	/* mode 1 */
	[2] = 88200,
	[3] = 96000,
	/* mode 2 */
	[4] = 176400,
	[5] = 192000,
	};

	static void name_card(struct snd_motu *motu)
	{
	struct fw_device *fw_dev = fw_parent_device(motu->unit);
	struct fw_csr_iterator it;
	int key, val;
	u32 version = 0;

	fw_csr_iterator_init(&it, motu->unit->directory);
	while (fw_csr_iterator_next(&it, &key, &val)) {
	switch (key) {
	case CSR_VERSION:
	version = val;
	break;
	}
	}

	strcpy(motu->card->driver, "FW-MOTU");
	strcpy(motu->card->shortname, motu->spec->name);
	strcpy(motu->card->mixername, motu->spec->name);
	snprintf(motu->card->longname, sizeof(motu->card->longname),
	"MOTU %s (version:%d), GUID %08x%08x at %s, S%d",
	motu->spec->name, version,
	fw_dev->config_rom[3], fw_dev->config_rom[4],
	dev_name(&motu->unit->device), 100 << fw_dev->max_speed);
	}

	static void motu_free(struct snd_motu *motu)
	{
	snd_motu_transaction_unregister(motu);

	snd_motu_stream_destroy_duplex(motu);
	fw_unit_put(motu->unit);

	mutex_destroy(&motu->mutex);
	kfree(motu);
	}

	/*
	* This module releases the FireWire unit data after all ALSA character devices
	* are released by applications. This is for releasing stream data or finishing
	* transactions safely. Thus at returning from .remove(), this module still keep
	* references for the unit.
	*/
	static void motu_card_free(struct snd_card *card)
	{
	motu_free(card->private_data);
	}

	static void do_registration(struct work_struct *work)
	{
	struct snd_motu *motu = container_of(work, struct snd_motu, dwork.work);
	int err;

	if (motu->registered)
	return;

	err = snd_card_new(&motu->unit->device, -1, NULL, THIS_MODULE, 0,
	&motu->card);
	if (err < 0)
	return;

	name_card(motu);

	err = snd_motu_transaction_register(motu);
	if (err < 0)
	goto error;

	err = snd_motu_stream_init_duplex(motu);
	if (err < 0)
	goto error;

	snd_motu_proc_init(motu);

	err = snd_motu_create_pcm_devices(motu);
	if (err < 0)
	goto error;

	if (motu->spec->flags & SND_MOTU_SPEC_HAS_MIDI) {
	err = snd_motu_create_midi_devices(motu);
	if (err < 0)
	goto error;
	}

	err = snd_motu_create_hwdep_device(motu);
	if (err < 0)
	goto error;

	err = snd_card_register(motu->card);
	if (err < 0)
	goto error;

	/*
	* After registered, motu instance can be released corresponding to
	* releasing the sound card instance.
	*/
	motu->card->private_free = motu_card_free;
	motu->card->private_data = motu;
	motu->registered = true;

	return;
	error:
	snd_motu_transaction_unregister(motu);
	snd_card_free(motu->card);
	dev_info(&motu->unit->device,
	"Sound card registration failed: %d\n", err);
	}

	static int motu_probe(struct fw_unit *unit,
	const struct ieee1394_device_id *entry)
	{
	struct snd_motu *motu;

	/* Allocate this independently of sound card instance. */
	motu = kzalloc(sizeof(struct snd_motu), GFP_KERNEL);
	if (motu == NULL)
	return -ENOMEM;

	motu->spec = (const struct snd_motu_spec *)entry->driver_data;
	motu->unit = fw_unit_get(unit);
	dev_set_drvdata(&unit->device, motu);

	mutex_init(&motu->mutex);
	spin_lock_init(&motu->lock);
	init_waitqueue_head(&motu->hwdep_wait);

	/* Allocate and register this sound card later. */
	INIT_DEFERRABLE_WORK(&motu->dwork, do_registration);
	snd_fw_schedule_registration(unit, &motu->dwork);

	return 0;
	}

	static void motu_remove(struct fw_unit *unit)
	{
	struct snd_motu *motu = dev_get_drvdata(&unit->device);

	/*
	* Confirm to stop the work for registration before the sound card is
	* going to be released. The work is not scheduled again because bus
	* reset handler is not called anymore.
	*/
	cancel_delayed_work_sync(&motu->dwork);

	if (motu->registered) {
	/* No need to wait for releasing card object in this context. */
	snd_card_free_when_closed(motu->card);
	} else {
	/* Don't forget this case. */
	motu_free(motu);
	}
	}

	static void motu_bus_update(struct fw_unit *unit)
	{
	struct snd_motu *motu = dev_get_drvdata(&unit->device);

	/* Postpone a workqueue for deferred registration. */
	if (!motu->registered)
	snd_fw_schedule_registration(unit, &motu->dwork);

	/* The handler address register becomes initialized. */
	snd_motu_transaction_reregister(motu);
	}

	static struct snd_motu_spec motu_828mk2 = {
	.name = "828mk2",
	.protocol = &snd_motu_protocol_v2,
	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 \|
	SND_MOTU_SPEC_TX_MICINST_CHUNK \|
	SND_MOTU_SPEC_TX_RETURN_CHUNK \|
	SND_MOTU_SPEC_HAS_OPT_IFACE_A \|
	SND_MOTU_SPEC_HAS_MIDI,

	.analog_in_ports = 8,
	.analog_out_ports = 8,
	};

	static struct snd_motu_spec motu_828mk3 = {
	.name = "828mk3",
	.protocol = &snd_motu_protocol_v3,
	.flags = SND_MOTU_SPEC_SUPPORT_CLOCK_X2 \|
	SND_MOTU_SPEC_SUPPORT_CLOCK_X4 \|
	SND_MOTU_SPEC_TX_MICINST_CHUNK \|
	SND_MOTU_SPEC_TX_RETURN_CHUNK \|
	SND_MOTU_SPEC_TX_REVERB_CHUNK \|
	SND_MOTU_SPEC_HAS_OPT_IFACE_A \|
	SND_MOTU_SPEC_HAS_OPT_IFACE_B \|
	SND_MOTU_SPEC_HAS_MIDI,

	.analog_in_ports = 8,
	.analog_out_ports = 8,
	};

	#define SND_MOTU_DEV_ENTRY(model, data) \
	{ \
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| \
	IEEE1394_MATCH_MODEL_ID \| \
	IEEE1394_MATCH_SPECIFIER_ID, \
	.vendor_id = OUI_MOTU, \
	.model_id = model, \
	.specifier_id = OUI_MOTU, \
	.driver_data = (kernel_ulong_t)data, \
	}

	static const struct ieee1394_device_id motu_id_table[] = {
	SND_MOTU_DEV_ENTRY(0x101800, &motu_828mk2),
	SND_MOTU_DEV_ENTRY(0x106800, &motu_828mk3), /* FireWire only. */
	SND_MOTU_DEV_ENTRY(0x100800, &motu_828mk3), /* Hybrid. */
	{ }
	};
	MODULE_DEVICE_TABLE(ieee1394, motu_id_table);

	static struct fw_driver motu_driver = {
	.driver = {
	.owner = THIS_MODULE,
	.name = KBUILD_MODNAME,
	.bus = &fw_bus_type,
	},
	.probe = motu_probe,
	.update = motu_bus_update,
	.remove = motu_remove,
	.id_table = motu_id_table,
	};

	static int __init alsa_motu_init(void)
	{
	return driver_register(&motu_driver.driver);
	}

	static void __exit alsa_motu_exit(void)
	{
	driver_unregister(&motu_driver.driver);
	}

	module_init(alsa_motu_init);
	module_exit(alsa_motu_exit);