sound/firewire/dice/dice.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * TC Applied Technologies Digital Interface Communications Engine driver
  *
  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
  */

 #include "dice.h"

 MODULE_DESCRIPTION("DICE driver");
 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
 MODULE_LICENSE("GPL");

 #define OUI_WEISS		0x001c6a
 #define OUI_LOUD		0x000ff2
 #define OUI_FOCUSRITE		0x00130e
 #define OUI_TCELECTRONIC	0x000166
 #define OUI_ALESIS		0x000595
 #define OUI_MAUDIO		0x000d6c
 #define OUI_MYTEK		0x001ee8
 #define OUI_SSL			0x0050c2	// Actually ID reserved by IEEE.
 #define OUI_PRESONUS		0x000a92
 #define OUI_HARMAN		0x000fd7
 #define OUI_AVID		0x00a07e

 #define DICE_CATEGORY_ID	0x04
 #define WEISS_CATEGORY_ID	0x00
 #define LOUD_CATEGORY_ID	0x10
 #define HARMAN_CATEGORY_ID	0x20

 #define MODEL_ALESIS_IO_BOTH	0x000001

 static int check_dice_category(struct fw_unit *unit)
 {
 	struct fw_device *device = fw_parent_device(unit);
 	struct fw_csr_iterator it;
 	int key, val, vendor = -1, model = -1;
 	unsigned int category;

 	/*
 	 * Check that GUID and unit directory are constructed according to DICE
 	 * rules, i.e., that the specifier ID is the GUID's OUI, and that the
 	 * GUID chip ID consists of the 8-bit category ID, the 10-bit product
 	 * ID, and a 22-bit serial number.
 	 */
 	fw_csr_iterator_init(&it, unit->directory);
 	while (fw_csr_iterator_next(&it, &key, &val)) {
 		switch (key) {
 		case CSR_SPECIFIER_ID:
 			vendor = val;
 			break;
 		case CSR_MODEL:
 			model = val;
 			break;
 		}
 	}

 	if (vendor == OUI_WEISS)
 		category = WEISS_CATEGORY_ID;
 	else if (vendor == OUI_LOUD)
 		category = LOUD_CATEGORY_ID;
 	else if (vendor == OUI_HARMAN)
 		category = HARMAN_CATEGORY_ID;
 	else
 		category = DICE_CATEGORY_ID;
 	if (device->config_rom[3] != ((vendor << 8) | category) ||
 	    device->config_rom[4] >> 22 != model)
 		return -ENODEV;

 	return 0;
 }

 static int check_clock_caps(struct snd_dice *dice)
 {
 	__be32 value;
 	int err;

 	/* some very old firmwares don't tell about their clock support */
 	if (dice->clock_caps > 0) {
 		err = snd_dice_transaction_read_global(dice,
 						GLOBAL_CLOCK_CAPABILITIES,
 						&value, 4);
 		if (err < 0)
 			return err;
 		dice->clock_caps = be32_to_cpu(value);
 	} else {
 		/* this should be supported by any device */
 		dice->clock_caps = CLOCK_CAP_RATE_44100 |
 				   CLOCK_CAP_RATE_48000 |
 				   CLOCK_CAP_SOURCE_ARX1 |
 				   CLOCK_CAP_SOURCE_INTERNAL;
 	}

 	return 0;
 }

 static void dice_card_strings(struct snd_dice *dice)
 {
 	struct snd_card *card = dice->card;
 	struct fw_device *dev = fw_parent_device(dice->unit);
 	char vendor[32], model[32];
 	unsigned int i;
 	int err;

 	strcpy(card->driver, "DICE");

 	strcpy(card->shortname, "DICE");
 	BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname));
 	err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME,
 					       card->shortname,
 					       sizeof(card->shortname));
 	if (err >= 0) {
 		/* DICE strings are returned in "always-wrong" endianness */
 		BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0);
 		for (i = 0; i < sizeof(card->shortname); i += 4)
 			swab32s((u32 *)&card->shortname[i]);
 		card->shortname[sizeof(card->shortname) - 1] = '\0';
 	}

 	strcpy(vendor, "?");
 	fw_csr_string(dev->config_rom + 5, CSR_VENDOR, vendor, sizeof(vendor));
 	strcpy(model, "?");
 	fw_csr_string(dice->unit->directory, CSR_MODEL, model, sizeof(model));
 	snprintf(card->longname, sizeof(card->longname),
 		 "%s %s (serial %u) at %s, S%d",
 		 vendor, model, dev->config_rom[4] & 0x3fffff,
 		 dev_name(&dice->unit->device), 100 << dev->max_speed);

 	strcpy(card->mixername, "DICE");
 }

 static void dice_card_free(struct snd_card *card)
 {
 	struct snd_dice *dice = card->private_data;

 	snd_dice_stream_destroy_duplex(dice);
 	snd_dice_transaction_destroy(dice);

 	mutex_destroy(&dice->mutex);
 	fw_unit_put(dice->unit);
 }

 static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry)
 {
 	struct snd_card *card;
 	struct snd_dice *dice;
 	snd_dice_detect_formats_t detect_formats;
 	int err;

 	if (!entry->driver_data && entry->vendor_id != OUI_SSL) {
 		err = check_dice_category(unit);
 		if (err < 0)
 			return -ENODEV;
 	}

 	err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*dice), &card);
 	if (err < 0)
 		return err;
 	card->private_free = dice_card_free;

 	dice = card->private_data;
 	dice->unit = fw_unit_get(unit);
 	dev_set_drvdata(&unit->device, dice);
 	dice->card = card;

 	if (!entry->driver_data)
 		detect_formats = snd_dice_stream_detect_current_formats;
 	else
 		detect_formats = (snd_dice_detect_formats_t)entry->driver_data;

 	// Below models are compliant to IEC 61883-1/6 and have no quirk at high sampling transfer
 	// frequency.
 	// * Avid M-Box 3 Pro
 	// * M-Audio Profire 610
 	// * M-Audio Profire 2626
 	if (entry->vendor_id == OUI_MAUDIO || entry->vendor_id == OUI_AVID)
 		dice->disable_double_pcm_frames = true;

 	spin_lock_init(&dice->lock);
 	mutex_init(&dice->mutex);
 	init_completion(&dice->clock_accepted);
 	init_waitqueue_head(&dice->hwdep_wait);

 	err = snd_dice_transaction_init(dice);
 	if (err < 0)
 		goto error;

 	err = check_clock_caps(dice);
 	if (err < 0)
 		goto error;

 	dice_card_strings(dice);

 	err = detect_formats(dice);
 	if (err < 0)
 		goto error;

 	err = snd_dice_stream_init_duplex(dice);
 	if (err < 0)
 		goto error;

 	snd_dice_create_proc(dice);

 	err = snd_dice_create_pcm(dice);
 	if (err < 0)
 		goto error;

 	err = snd_dice_create_midi(dice);
 	if (err < 0)
 		goto error;

 	err = snd_dice_create_hwdep(dice);
 	if (err < 0)
 		goto error;

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

 	return 0;
 error:
 	snd_card_free(card);
 	return err;
 }

 static void dice_remove(struct fw_unit *unit)
 {
 	struct snd_dice *dice = dev_get_drvdata(&unit->device);

 	// Block till all of ALSA character devices are released.
 	snd_card_free(dice->card);
 }

 static void dice_bus_reset(struct fw_unit *unit)
 {
 	struct snd_dice *dice = dev_get_drvdata(&unit->device);

 	/* The handler address register becomes initialized. */
 	snd_dice_transaction_reinit(dice);

 	mutex_lock(&dice->mutex);
 	snd_dice_stream_update_duplex(dice);
 	mutex_unlock(&dice->mutex);
 }

 #define DICE_INTERFACE	0x000001

 #define DICE_DEV_ENTRY_TYPICAL(vendor, model, data) \
 	{ \
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | \
 				  IEEE1394_MATCH_MODEL_ID | \
 				  IEEE1394_MATCH_SPECIFIER_ID | \
 				  IEEE1394_MATCH_VERSION, \
 		.vendor_id	= (vendor), \
 		.model_id	= (model), \
 		.specifier_id	= (vendor), \
 		.version	= DICE_INTERFACE, \
 		.driver_data = (kernel_ulong_t)(data), \
 	}

 static const struct ieee1394_device_id dice_id_table[] = {
 	// Avid M-Box 3 Pro. To match in probe function.
 	DICE_DEV_ENTRY_TYPICAL(OUI_AVID, 0x000004, snd_dice_detect_extension_formats),
 	/* M-Audio Profire 2626 has a different value in version field. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_MAUDIO,
 		.model_id	= 0x000010,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats,
 	},
 	/* M-Audio Profire 610 has a different value in version field. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_MAUDIO,
 		.model_id	= 0x000011,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats,
 	},
 	/* TC Electronic Konnekt 24D. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_TCELECTRONIC,
 		.model_id	= 0x000020,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
 	/* TC Electronic Konnekt 8. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_TCELECTRONIC,
 		.model_id	= 0x000021,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
 	/* TC Electronic Studio Konnekt 48. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_TCELECTRONIC,
 		.model_id	= 0x000022,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
 	/* TC Electronic Konnekt Live. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_TCELECTRONIC,
 		.model_id	= 0x000023,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
 	/* TC Electronic Desktop Konnekt 6. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_TCELECTRONIC,
 		.model_id	= 0x000024,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
 	/* TC Electronic Impact Twin. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_TCELECTRONIC,
 		.model_id	= 0x000027,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
 	/* TC Electronic Digital Konnekt x32. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_TCELECTRONIC,
 		.model_id	= 0x000030,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
 	},
 	/* Alesis iO14/iO26. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_ALESIS,
 		.model_id	= MODEL_ALESIS_IO_BOTH,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_alesis_formats,
 	},
 	// Alesis MasterControl.
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_ALESIS,
 		.model_id	= 0x000002,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_alesis_mastercontrol_formats,
 	},
 	/* Mytek Stereo 192 DSD-DAC. */
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_MYTEK,
 		.model_id	= 0x000002,
 		.driver_data = (kernel_ulong_t)snd_dice_detect_mytek_formats,
 	},
 	// Solid State Logic, Duende Classic and Mini.
 	// NOTE: each field of GUID in config ROM is not compliant to standard
 	// DICE scheme.
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_SSL,
 		.model_id	= 0x000070,
 	},
 	// Presonus FireStudio.
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_PRESONUS,
 		.model_id	= 0x000008,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_presonus_formats,
 	},
 	// Lexicon I-ONYX FW810S.
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_HARMAN,
 		.model_id	= 0x000001,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_harman_formats,
 	},
 	// Focusrite Saffire Pro 40 with TCD3070-CH.
 	// The model has quirk in its GUID, in which model field is 0x000013 and different from
 	// model ID (0x0000de) in its root/unit directory.
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID |
 				  IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_FOCUSRITE,
 		.model_id	= 0x0000de,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_focusrite_pro40_tcd3070_formats,
 	},
 	// Weiss DAC202: 192kHz 2-channel DAC
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x000007,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss DAC202: 192kHz 2-channel DAC (Maya edition)
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x000008,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss MAN301: 192kHz 2-channel music archive network player
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x00000b,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss INT202: 192kHz unidirectional 2-channel digital Firewire face
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x000006,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss INT203: 192kHz bidirectional 2-channel digital Firewire face
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x00000a,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss ADC2: 192kHz A/D converter with microphone preamps and inputs
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x000001,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss DAC2/Minerva: 192kHz 2-channel DAC
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x000003,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss Vesta: 192kHz 2-channel Firewire to AES/EBU interface
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x000002,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	// Weiss AFI1: 192kHz 24-channel Firewire to ADAT or AES/EBU face
 	{
 		.match_flags	= IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_MODEL_ID,
 		.vendor_id	= OUI_WEISS,
 		.model_id	= 0x000004,
 		.driver_data	= (kernel_ulong_t)snd_dice_detect_weiss_formats,
 	},
 	{
 		.match_flags = IEEE1394_MATCH_VERSION,
 		.version     = DICE_INTERFACE,
 	},
 	{ }
 };
 MODULE_DEVICE_TABLE(ieee1394, dice_id_table);

 static struct fw_driver dice_driver = {
 	.driver   = {
 		.owner	= THIS_MODULE,
 		.name	= KBUILD_MODNAME,
 		.bus	= &fw_bus_type,
 	},
 	.probe    = dice_probe,
 	.update   = dice_bus_reset,
 	.remove   = dice_remove,
 	.id_table = dice_id_table,
 };

 static int __init alsa_dice_init(void)
 {
 	return driver_register(&dice_driver.driver);
 }

 static void __exit alsa_dice_exit(void)
 {
 	driver_unregister(&dice_driver.driver);
 }

 module_init(alsa_dice_init);
 module_exit(alsa_dice_exit);
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* TC Applied Technologies Digital Interface Communications Engine driver
	*
	* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
	*/

	#include "dice.h"

	MODULE_DESCRIPTION("DICE driver");
	MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
	MODULE_LICENSE("GPL");

	#define OUI_WEISS 0x001c6a
	#define OUI_LOUD 0x000ff2
	#define OUI_FOCUSRITE 0x00130e
	#define OUI_TCELECTRONIC 0x000166
	#define OUI_ALESIS 0x000595
	#define OUI_MAUDIO 0x000d6c
	#define OUI_MYTEK 0x001ee8
	#define OUI_SSL 0x0050c2 // Actually ID reserved by IEEE.
	#define OUI_PRESONUS 0x000a92
	#define OUI_HARMAN 0x000fd7
	#define OUI_AVID 0x00a07e

	#define DICE_CATEGORY_ID 0x04
	#define WEISS_CATEGORY_ID 0x00
	#define LOUD_CATEGORY_ID 0x10
	#define HARMAN_CATEGORY_ID 0x20

	#define MODEL_ALESIS_IO_BOTH 0x000001

	static int check_dice_category(struct fw_unit *unit)
	{
	struct fw_device *device = fw_parent_device(unit);
	struct fw_csr_iterator it;
	int key, val, vendor = -1, model = -1;
	unsigned int category;

	/*
	* Check that GUID and unit directory are constructed according to DICE
	* rules, i.e., that the specifier ID is the GUID's OUI, and that the
	* GUID chip ID consists of the 8-bit category ID, the 10-bit product
	* ID, and a 22-bit serial number.
	*/
	fw_csr_iterator_init(&it, unit->directory);
	while (fw_csr_iterator_next(&it, &key, &val)) {
	switch (key) {
	case CSR_SPECIFIER_ID:
	vendor = val;
	break;
	case CSR_MODEL:
	model = val;
	break;
	}
	}

	if (vendor == OUI_WEISS)
	category = WEISS_CATEGORY_ID;
	else if (vendor == OUI_LOUD)
	category = LOUD_CATEGORY_ID;
	else if (vendor == OUI_HARMAN)
	category = HARMAN_CATEGORY_ID;
	else
	category = DICE_CATEGORY_ID;
	if (device->config_rom[3] != ((vendor << 8) \| category) \|\|
	device->config_rom[4] >> 22 != model)
	return -ENODEV;

	return 0;
	}

	static int check_clock_caps(struct snd_dice *dice)
	{
	__be32 value;
	int err;

	/* some very old firmwares don't tell about their clock support */
	if (dice->clock_caps > 0) {
	err = snd_dice_transaction_read_global(dice,
	GLOBAL_CLOCK_CAPABILITIES,
	&value, 4);
	if (err < 0)
	return err;
	dice->clock_caps = be32_to_cpu(value);
	} else {
	/* this should be supported by any device */
	dice->clock_caps = CLOCK_CAP_RATE_44100 \|
	CLOCK_CAP_RATE_48000 \|
	CLOCK_CAP_SOURCE_ARX1 \|
	CLOCK_CAP_SOURCE_INTERNAL;
	}

	return 0;
	}

	static void dice_card_strings(struct snd_dice *dice)
	{
	struct snd_card *card = dice->card;
	struct fw_device *dev = fw_parent_device(dice->unit);
	char vendor[32], model[32];
	unsigned int i;
	int err;

	strcpy(card->driver, "DICE");

	strcpy(card->shortname, "DICE");
	BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname));
	err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME,
	card->shortname,
	sizeof(card->shortname));
	if (err >= 0) {
	/* DICE strings are returned in "always-wrong" endianness */
	BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0);
	for (i = 0; i < sizeof(card->shortname); i += 4)
	swab32s((u32 *)&card->shortname[i]);
	card->shortname[sizeof(card->shortname) - 1] = '\0';
	}

	strcpy(vendor, "?");
	fw_csr_string(dev->config_rom + 5, CSR_VENDOR, vendor, sizeof(vendor));
	strcpy(model, "?");
	fw_csr_string(dice->unit->directory, CSR_MODEL, model, sizeof(model));
	snprintf(card->longname, sizeof(card->longname),
	"%s %s (serial %u) at %s, S%d",
	vendor, model, dev->config_rom[4] & 0x3fffff,
	dev_name(&dice->unit->device), 100 << dev->max_speed);

	strcpy(card->mixername, "DICE");
	}

	static void dice_card_free(struct snd_card *card)
	{
	struct snd_dice *dice = card->private_data;

	snd_dice_stream_destroy_duplex(dice);
	snd_dice_transaction_destroy(dice);

	mutex_destroy(&dice->mutex);
	fw_unit_put(dice->unit);
	}

	static int dice_probe(struct fw_unit unit, const struct ieee1394_device_id entry)
	{
	struct snd_card *card;
	struct snd_dice *dice;
	snd_dice_detect_formats_t detect_formats;
	int err;

	if (!entry->driver_data && entry->vendor_id != OUI_SSL) {
	err = check_dice_category(unit);
	if (err < 0)
	return -ENODEV;
	}

	err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*dice), &card);
	if (err < 0)
	return err;
	card->private_free = dice_card_free;

	dice = card->private_data;
	dice->unit = fw_unit_get(unit);
	dev_set_drvdata(&unit->device, dice);
	dice->card = card;

	if (!entry->driver_data)
	detect_formats = snd_dice_stream_detect_current_formats;
	else
	detect_formats = (snd_dice_detect_formats_t)entry->driver_data;

	// Below models are compliant to IEC 61883-1/6 and have no quirk at high sampling transfer
	// frequency.
	// * Avid M-Box 3 Pro
	// * M-Audio Profire 610
	// * M-Audio Profire 2626
	if (entry->vendor_id == OUI_MAUDIO \|\| entry->vendor_id == OUI_AVID)
	dice->disable_double_pcm_frames = true;

	spin_lock_init(&dice->lock);
	mutex_init(&dice->mutex);
	init_completion(&dice->clock_accepted);
	init_waitqueue_head(&dice->hwdep_wait);

	err = snd_dice_transaction_init(dice);
	if (err < 0)
	goto error;

	err = check_clock_caps(dice);
	if (err < 0)
	goto error;

	dice_card_strings(dice);

	err = detect_formats(dice);
	if (err < 0)
	goto error;

	err = snd_dice_stream_init_duplex(dice);
	if (err < 0)
	goto error;

	snd_dice_create_proc(dice);

	err = snd_dice_create_pcm(dice);
	if (err < 0)
	goto error;

	err = snd_dice_create_midi(dice);
	if (err < 0)
	goto error;

	err = snd_dice_create_hwdep(dice);
	if (err < 0)
	goto error;

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

	return 0;
	error:
	snd_card_free(card);
	return err;
	}

	static void dice_remove(struct fw_unit *unit)
	{
	struct snd_dice *dice = dev_get_drvdata(&unit->device);

	// Block till all of ALSA character devices are released.
	snd_card_free(dice->card);
	}

	static void dice_bus_reset(struct fw_unit *unit)
	{
	struct snd_dice *dice = dev_get_drvdata(&unit->device);

	/* The handler address register becomes initialized. */
	snd_dice_transaction_reinit(dice);

	mutex_lock(&dice->mutex);
	snd_dice_stream_update_duplex(dice);
	mutex_unlock(&dice->mutex);
	}

	#define DICE_INTERFACE 0x000001

	#define DICE_DEV_ENTRY_TYPICAL(vendor, model, data) \
	{ \
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| \
	IEEE1394_MATCH_MODEL_ID \| \
	IEEE1394_MATCH_SPECIFIER_ID \| \
	IEEE1394_MATCH_VERSION, \
	.vendor_id = (vendor), \
	.model_id = (model), \
	.specifier_id = (vendor), \
	.version = DICE_INTERFACE, \
	.driver_data = (kernel_ulong_t)(data), \
	}

	static const struct ieee1394_device_id dice_id_table[] = {
	// Avid M-Box 3 Pro. To match in probe function.
	DICE_DEV_ENTRY_TYPICAL(OUI_AVID, 0x000004, snd_dice_detect_extension_formats),
	/* M-Audio Profire 2626 has a different value in version field. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_MAUDIO,
	.model_id = 0x000010,
	.driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats,
	},
	/* M-Audio Profire 610 has a different value in version field. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_MAUDIO,
	.model_id = 0x000011,
	.driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats,
	},
	/* TC Electronic Konnekt 24D. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_TCELECTRONIC,
	.model_id = 0x000020,
	.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
	},
	/* TC Electronic Konnekt 8. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_TCELECTRONIC,
	.model_id = 0x000021,
	.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
	},
	/* TC Electronic Studio Konnekt 48. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_TCELECTRONIC,
	.model_id = 0x000022,
	.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
	},
	/* TC Electronic Konnekt Live. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_TCELECTRONIC,
	.model_id = 0x000023,
	.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
	},
	/* TC Electronic Desktop Konnekt 6. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_TCELECTRONIC,
	.model_id = 0x000024,
	.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
	},
	/* TC Electronic Impact Twin. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_TCELECTRONIC,
	.model_id = 0x000027,
	.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
	},
	/* TC Electronic Digital Konnekt x32. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_TCELECTRONIC,
	.model_id = 0x000030,
	.driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats,
	},
	/* Alesis iO14/iO26. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_ALESIS,
	.model_id = MODEL_ALESIS_IO_BOTH,
	.driver_data = (kernel_ulong_t)snd_dice_detect_alesis_formats,
	},
	// Alesis MasterControl.
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_ALESIS,
	.model_id = 0x000002,
	.driver_data = (kernel_ulong_t)snd_dice_detect_alesis_mastercontrol_formats,
	},
	/* Mytek Stereo 192 DSD-DAC. */
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_MYTEK,
	.model_id = 0x000002,
	.driver_data = (kernel_ulong_t)snd_dice_detect_mytek_formats,
	},
	// Solid State Logic, Duende Classic and Mini.
	// NOTE: each field of GUID in config ROM is not compliant to standard
	// DICE scheme.
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_SSL,
	.model_id = 0x000070,
	},
	// Presonus FireStudio.
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_PRESONUS,
	.model_id = 0x000008,
	.driver_data = (kernel_ulong_t)snd_dice_detect_presonus_formats,
	},
	// Lexicon I-ONYX FW810S.
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_HARMAN,
	.model_id = 0x000001,
	.driver_data = (kernel_ulong_t)snd_dice_detect_harman_formats,
	},
	// Focusrite Saffire Pro 40 with TCD3070-CH.
	// The model has quirk in its GUID, in which model field is 0x000013 and different from
	// model ID (0x0000de) in its root/unit directory.
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \|
	IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_FOCUSRITE,
	.model_id = 0x0000de,
	.driver_data = (kernel_ulong_t)snd_dice_detect_focusrite_pro40_tcd3070_formats,
	},
	// Weiss DAC202: 192kHz 2-channel DAC
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x000007,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss DAC202: 192kHz 2-channel DAC (Maya edition)
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x000008,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss MAN301: 192kHz 2-channel music archive network player
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x00000b,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss INT202: 192kHz unidirectional 2-channel digital Firewire face
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x000006,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss INT203: 192kHz bidirectional 2-channel digital Firewire face
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x00000a,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss ADC2: 192kHz A/D converter with microphone preamps and inputs
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x000001,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss DAC2/Minerva: 192kHz 2-channel DAC
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x000003,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss Vesta: 192kHz 2-channel Firewire to AES/EBU interface
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x000002,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	// Weiss AFI1: 192kHz 24-channel Firewire to ADAT or AES/EBU face
	{
	.match_flags = IEEE1394_MATCH_VENDOR_ID \| IEEE1394_MATCH_MODEL_ID,
	.vendor_id = OUI_WEISS,
	.model_id = 0x000004,
	.driver_data = (kernel_ulong_t)snd_dice_detect_weiss_formats,
	},
	{
	.match_flags = IEEE1394_MATCH_VERSION,
	.version = DICE_INTERFACE,
	},
	{ }
	};
	MODULE_DEVICE_TABLE(ieee1394, dice_id_table);

	static struct fw_driver dice_driver = {
	.driver = {
	.owner = THIS_MODULE,
	.name = KBUILD_MODNAME,
	.bus = &fw_bus_type,
	},
	.probe = dice_probe,
	.update = dice_bus_reset,
	.remove = dice_remove,
	.id_table = dice_id_table,
	};

	static int __init alsa_dice_init(void)
	{
	return driver_register(&dice_driver.driver);
	}

	static void __exit alsa_dice_exit(void)
	{
	driver_unregister(&dice_driver.driver);
	}

	module_init(alsa_dice_init);
	module_exit(alsa_dice_exit);