[deliverable/linux.git] / sound / firewire / dice / dice.c

/*
 * TC Applied Technologies Digital Interface Communications Engine driver
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include "dice.h"

MODULE_DESCRIPTION("DICE driver");
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_LICENSE("GPL v2");

#define OUI_WEISS		0x001c6a

#define DICE_CATEGORY_ID	0x04
#define WEISS_CATEGORY_ID	0x00

static int dice_interface_check(struct fw_unit *unit)
{
	static const int min_values[10] = {
		10, 0x64 / 4,
		10, 0x18 / 4,
		10, 0x18 / 4,
		0, 0,
		0, 0,
	};
	struct fw_device *device = fw_parent_device(unit);
	struct fw_csr_iterator it;
	int key, val, vendor = -1, model = -1, err;
	unsigned int category, i;
	__be32 *pointers, value;
	__be32 version;

	pointers = kmalloc_array(ARRAY_SIZE(min_values), sizeof(__be32),
				 GFP_KERNEL);
	if (pointers == NULL)
		return -ENOMEM;

	/*
	 * 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
		category = DICE_CATEGORY_ID;
	if (device->config_rom[3] != ((vendor << 8) | category) ||
	    device->config_rom[4] >> 22 != model) {
		err = -ENODEV;
		goto end;
	}

	/*
	 * Check that the sub address spaces exist and are located inside the
	 * private address space.  The minimum values are chosen so that all
	 * minimally required registers are included.
	 */
	err = snd_fw_transaction(unit, TCODE_READ_BLOCK_REQUEST,
				 DICE_PRIVATE_SPACE, pointers,
				 sizeof(__be32) * ARRAY_SIZE(min_values), 0);
	if (err < 0) {
		err = -ENODEV;
		goto end;
	}
	for (i = 0; i < ARRAY_SIZE(min_values); ++i) {
		value = be32_to_cpu(pointers[i]);
		if (value < min_values[i] || value >= 0x40000) {
			err = -ENODEV;
			goto end;
		}
	}

	/*
	 * Check that the implemented DICE driver specification major version
	 * number matches.
	 */
	err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
				 DICE_PRIVATE_SPACE +
				 be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION,
				 &version, 4, 0);
	if (err < 0) {
		err = -ENODEV;
		goto end;
	}
	if ((version & cpu_to_be32(0xff000000)) != cpu_to_be32(0x01000000)) {
		dev_err(&unit->device,
			"unknown DICE version: 0x%08x\n", be32_to_cpu(version));
		err = -ENODEV;
		goto end;
	}
end:
	return err;
}

static int highest_supported_mode_rate(struct snd_dice *dice,
				       unsigned int mode, unsigned int *rate)
{
	unsigned int i, m;

	for (i = ARRAY_SIZE(snd_dice_rates); i > 0; i--) {
		*rate = snd_dice_rates[i - 1];
		if (snd_dice_stream_get_rate_mode(dice, *rate, &m) < 0)
			continue;
		if (mode == m)
			break;
	}
	if (i == 0)
		return -EINVAL;

	return 0;
}

static int dice_read_mode_params(struct snd_dice *dice, unsigned int mode)
{
	__be32 values[2];
	unsigned int rate;
	int err;

	if (highest_supported_mode_rate(dice, mode, &rate) < 0) {
		dice->tx_channels[mode] = 0;
		dice->tx_midi_ports[mode] = 0;
		dice->rx_channels[mode] = 0;
		dice->rx_midi_ports[mode] = 0;
		return 0;
	}

	err = snd_dice_transaction_set_rate(dice, rate);
	if (err < 0)
		return err;

	err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO,
					   values, sizeof(values));
	if (err < 0)
		return err;

	dice->tx_channels[mode]   = be32_to_cpu(values[0]);
	dice->tx_midi_ports[mode] = be32_to_cpu(values[1]);

	err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO,
					   values, sizeof(values));
	if (err < 0)
		return err;

	dice->rx_channels[mode]   = be32_to_cpu(values[0]);
	dice->rx_midi_ports[mode] = be32_to_cpu(values[1]);

	return 0;
}

static int dice_read_params(struct snd_dice *dice)
{
	__be32 value;
	int mode, 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;
	}

	for (mode = 2; mode >= 0; --mode) {
		err = dice_read_mode_params(dice, mode);
		if (err < 0)
			return err;
	}

	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");
}

/*
 * 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 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);
	fw_unit_put(dice->unit);

	mutex_destroy(&dice->mutex);
}

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

	err = dice_interface_check(unit);
	if (err < 0)
		goto end;

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

	dice = card->private_data;
	dice->card = card;
	dice->unit = fw_unit_get(unit);
	card->private_free = dice_card_free;

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

	dice_card_strings(dice);

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

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

	snd_dice_create_proc(dice);

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

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

	err = snd_card_register(card);
	if (err < 0) {
		snd_dice_stream_destroy_duplex(dice);
		goto error;
	}

	dev_set_drvdata(&unit->device, dice);
end:
	return err;
error:
	snd_card_free(card);
	return err;
}

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

	/* No need to wait for releasing card object in this context. */
	snd_card_free_when_closed(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

static const struct ieee1394_device_id dice_id_table[] = {
	{
		.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);
Commit	Line	Data
82fbb4f7 CL	1	/*
	2	* TC Applied Technologies Digital Interface Communications Engine driver
	3	*
	4	* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
	5	* Licensed under the terms of the GNU General Public License, version 2.
	6	*/
	7
7c2d4c0c	8	#include "dice.h"
82fbb4f7 CL	9
	10	MODULE_DESCRIPTION("DICE driver");
	11	MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
	12	MODULE_LICENSE("GPL v2");
	13
a471fcde CL	14	#define OUI_WEISS 0x001c6a
	15
	16	#define DICE_CATEGORY_ID 0x04
	17	#define WEISS_CATEGORY_ID 0x00
cbab328d CL	18
	19	static int dice_interface_check(struct fw_unit *unit)
	20	{
	21	static const int min_values[10] = {
	22	10, 0x64 / 4,
	23	10, 0x18 / 4,
	24	10, 0x18 / 4,
	25	0, 0,
	26	0, 0,
	27	};
	28	struct fw_device *device = fw_parent_device(unit);
	29	struct fw_csr_iterator it;
7c2d4c0c	30	int key, val, vendor = -1, model = -1, err;
a471fcde	31	unsigned int category, i;
7c2d4c0c	32	__be32 *pointers, value;
cbab328d CL	33	__be32 version;
cbab328d CL	34
7c2d4c0c TS	35	pointers = kmalloc_array(ARRAY_SIZE(min_values), sizeof(__be32),
	36	GFP_KERNEL);
	37	if (pointers == NULL)
	38	return -ENOMEM;
	39
cbab328d CL	40	/*
	41	* Check that GUID and unit directory are constructed according to DICE
	42	* rules, i.e., that the specifier ID is the GUID's OUI, and that the
a471fcde CL	43	* GUID chip ID consists of the 8-bit category ID, the 10-bit product
a471fcde CL	44	* ID, and a 22-bit serial number.
cbab328d CL	45	*/
cbab328d CL	46	fw_csr_iterator_init(&it, unit->directory);
7c2d4c0c	47	while (fw_csr_iterator_next(&it, &key, &val)) {
cbab328d CL	48	switch (key) {
cbab328d CL	49	case CSR_SPECIFIER_ID:
7c2d4c0c	50	vendor = val;
cbab328d CL	51	break;
cbab328d CL	52	case CSR_MODEL:
7c2d4c0c	53	model = val;
cbab328d CL	54	break;
	55	}
	56	}
a471fcde CL	57	if (vendor == OUI_WEISS)
	58	category = WEISS_CATEGORY_ID;
	59	else
	60	category = DICE_CATEGORY_ID;
	61	if (device->config_rom[3] != ((vendor << 8) \| category) \|\|
7c2d4c0c TS	62	device->config_rom[4] >> 22 != model) {
	63	err = -ENODEV;
	64	goto end;
	65	}
cbab328d CL	66
	67	/*
	68	* Check that the sub address spaces exist and are located inside the
	69	* private address space. The minimum values are chosen so that all
	70	* minimally required registers are included.
	71	*/
	72	err = snd_fw_transaction(unit, TCODE_READ_BLOCK_REQUEST,
7c2d4c0c TS	73	DICE_PRIVATE_SPACE, pointers,
	74	sizeof(__be32) * ARRAY_SIZE(min_values), 0);
	75	if (err < 0) {
	76	err = -ENODEV;
	77	goto end;
	78	}
	79	for (i = 0; i < ARRAY_SIZE(min_values); ++i) {
cbab328d	80	value = be32_to_cpu(pointers[i]);
7c2d4c0c TS	81	if (value < min_values[i] \|\| value >= 0x40000) {
	82	err = -ENODEV;
	83	goto end;
	84	}
cbab328d CL	85	}
	86
	87	/*
	88	* Check that the implemented DICE driver specification major version
	89	* number matches.
	90	*/
	91	err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
	92	DICE_PRIVATE_SPACE +
	93	be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION,
1b70485f	94	&version, 4, 0);
7c2d4c0c TS	95	if (err < 0) {
	96	err = -ENODEV;
	97	goto end;
	98	}
cbab328d CL	99	if ((version & cpu_to_be32(0xff000000)) != cpu_to_be32(0x01000000)) {
	100	dev_err(&unit->device,
	101	"unknown DICE version: 0x%08x\n", be32_to_cpu(version));
7c2d4c0c TS	102	err = -ENODEV;
7c2d4c0c TS	103	goto end;
cbab328d	104	}
7c2d4c0c TS	105	end:
7c2d4c0c TS	106	return err;
cbab328d CL	107	}
cbab328d CL	108
6eb6c81e TS	109	static int highest_supported_mode_rate(struct snd_dice *dice,
6eb6c81e TS	110	unsigned int mode, unsigned int *rate)
15a75c8b	111	{
6eb6c81e	112	unsigned int i, m;
15a75c8b	113
6eb6c81e TS	114	for (i = ARRAY_SIZE(snd_dice_rates); i > 0; i--) {
	115	*rate = snd_dice_rates[i - 1];
	116	if (snd_dice_stream_get_rate_mode(dice, *rate, &m) < 0)
	117	continue;
	118	if (mode == m)
	119	break;
	120	}
	121	if (i == 0)
	122	return -EINVAL;
15a75c8b	123
6eb6c81e	124	return 0;
15a75c8b CL	125	}
15a75c8b CL	126
732d153f	127	static int dice_read_mode_params(struct snd_dice *dice, unsigned int mode)
15a75c8b CL	128	{
15a75c8b CL	129	__be32 values[2];
6eb6c81e TS	130	unsigned int rate;
6eb6c81e TS	131	int err;
15a75c8b	132
6eb6c81e	133	if (highest_supported_mode_rate(dice, mode, &rate) < 0) {
9a02843c TS	134	dice->tx_channels[mode] = 0;
9a02843c TS	135	dice->tx_midi_ports[mode] = 0;
15a75c8b CL	136	dice->rx_channels[mode] = 0;
	137	dice->rx_midi_ports[mode] = 0;
	138	return 0;
	139	}
	140
6eb6c81e	141	err = snd_dice_transaction_set_rate(dice, rate);
15a75c8b CL	142	if (err < 0)
	143	return err;
	144
9a02843c TS	145	err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO,
	146	values, sizeof(values));
	147	if (err < 0)
	148	return err;
	149
	150	dice->tx_channels[mode] = be32_to_cpu(values[0]);
	151	dice->tx_midi_ports[mode] = be32_to_cpu(values[1]);
	152
7c2d4c0c TS	153	err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO,
7c2d4c0c TS	154	values, sizeof(values));
15a75c8b CL	155	if (err < 0)
	156	return err;
	157
	158	dice->rx_channels[mode] = be32_to_cpu(values[0]);
	159	dice->rx_midi_ports[mode] = be32_to_cpu(values[1]);
	160
	161	return 0;
	162	}
	163
732d153f	164	static int dice_read_params(struct snd_dice *dice)
82fbb4f7	165	{
a0301998	166	__be32 value;
15a75c8b	167	int mode, err;
82fbb4f7	168
a0301998	169	/* some very old firmwares don't tell about their clock support */
7c2d4c0c TS	170	if (dice->clock_caps > 0) {
	171	err = snd_dice_transaction_read_global(dice,
	172	GLOBAL_CLOCK_CAPABILITIES,
	173	&value, 4);
a0301998 CL	174	if (err < 0)
	175	return err;
	176	dice->clock_caps = be32_to_cpu(value);
	177	} else {
	178	/* this should be supported by any device */
	179	dice->clock_caps = CLOCK_CAP_RATE_44100 \|
	180	CLOCK_CAP_RATE_48000 \|
	181	CLOCK_CAP_SOURCE_ARX1 \|
	182	CLOCK_CAP_SOURCE_INTERNAL;
	183	}
	184
15a75c8b CL	185	for (mode = 2; mode >= 0; --mode) {
	186	err = dice_read_mode_params(dice, mode);
	187	if (err < 0)
	188	return err;
	189	}
	190
82fbb4f7 CL	191	return 0;
	192	}
	193
732d153f	194	static void dice_card_strings(struct snd_dice *dice)
82fbb4f7 CL	195	{
	196	struct snd_card *card = dice->card;
	197	struct fw_device *dev = fw_parent_device(dice->unit);
	198	char vendor[32], model[32];
	199	unsigned int i;
	200	int err;
	201
	202	strcpy(card->driver, "DICE");
	203
	204	strcpy(card->shortname, "DICE");
	205	BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname));
7c2d4c0c TS	206	err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME,
	207	card->shortname,
	208	sizeof(card->shortname));
82fbb4f7 CL	209	if (err >= 0) {
	210	/* DICE strings are returned in "always-wrong" endianness */
	211	BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0);
	212	for (i = 0; i < sizeof(card->shortname); i += 4)
	213	swab32s((u32 *)&card->shortname[i]);
	214	card->shortname[sizeof(card->shortname) - 1] = '\0';
	215	}
	216
	217	strcpy(vendor, "?");
	218	fw_csr_string(dev->config_rom + 5, CSR_VENDOR, vendor, sizeof(vendor));
	219	strcpy(model, "?");
	220	fw_csr_string(dice->unit->directory, CSR_MODEL, model, sizeof(model));
	221	snprintf(card->longname, sizeof(card->longname),
cbab328d CL	222	"%s %s (serial %u) at %s, S%d",
cbab328d CL	223	vendor, model, dev->config_rom[4] & 0x3fffff,
82fbb4f7 CL	224	dev_name(&dice->unit->device), 100 << dev->max_speed);
	225
	226	strcpy(card->mixername, "DICE");
	227	}
	228
12ed7192 TS	229	/*
	230	* This module releases the FireWire unit data after all ALSA character devices
	231	* are released by applications. This is for releasing stream data or finishing
	232	* transactions safely. Thus at returning from .remove(), this module still keep
	233	* references for the unit.
	234	*/
7c2d4c0c TS	235	static void dice_card_free(struct snd_card *card)
	236	{
	237	struct snd_dice *dice = card->private_data;
	238
dec84316	239	snd_dice_stream_destroy_duplex(dice);
7c2d4c0c	240	snd_dice_transaction_destroy(dice);
12ed7192 TS	241	fw_unit_put(dice->unit);
12ed7192 TS	242
7c2d4c0c TS	243	mutex_destroy(&dice->mutex);
	244	}
	245
82fbb4f7 CL	246	static int dice_probe(struct fw_unit unit, const struct ieee1394_device_id id)
	247	{
	248	struct snd_card *card;
732d153f	249	struct snd_dice *dice;
82fbb4f7 CL	250	int err;
82fbb4f7 CL	251
cbab328d CL	252	err = dice_interface_check(unit);
cbab328d CL	253	if (err < 0)
7c2d4c0c	254	goto end;
cbab328d	255
06b45f00 TI	256	err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE,
06b45f00 TI	257	sizeof(*dice), &card);
82fbb4f7	258	if (err < 0)
7c2d4c0c	259	goto end;
82fbb4f7 CL	260
	261	dice = card->private_data;
	262	dice->card = card;
12ed7192	263	dice->unit = fw_unit_get(unit);
7c2d4c0c TS	264	card->private_free = dice_card_free;
7c2d4c0c TS	265
0c29c918	266	spin_lock_init(&dice->lock);
82fbb4f7	267	mutex_init(&dice->mutex);
15a75c8b	268	init_completion(&dice->clock_accepted);
0c29c918	269	init_waitqueue_head(&dice->hwdep_wait);
82fbb4f7	270
7c2d4c0c	271	err = snd_dice_transaction_init(dice);
82fbb4f7	272	if (err < 0)
7c2d4c0c	273	goto error;
5ea4018e CL	274
	275	err = dice_read_params(dice);
	276	if (err < 0)
7c2d4c0c	277	goto error;
82fbb4f7 CL	278
	279	dice_card_strings(dice);
	280
c50fb91f	281	err = snd_dice_create_pcm(dice);
82fbb4f7 CL	282	if (err < 0)
	283	goto error;
	284
19af57b4	285	err = snd_dice_create_hwdep(dice);
82fbb4f7 CL	286	if (err < 0)
	287	goto error;
	288
04d426a0	289	snd_dice_create_proc(dice);
c614475b	290
a113ff88 TS	291	err = snd_dice_create_midi(dice);
	292	if (err < 0)
	293	goto error;
	294
9a02843c	295	err = snd_dice_stream_init_duplex(dice);
82fbb4f7 CL	296	if (err < 0)
82fbb4f7 CL	297	goto error;
82fbb4f7	298
7c2d4c0c TS	299	err = snd_card_register(card);
7c2d4c0c TS	300	if (err < 0) {
9a02843c	301	snd_dice_stream_destroy_duplex(dice);
7c2d4c0c TS	302	goto error;
7c2d4c0c TS	303	}
82fbb4f7	304
7c2d4c0c TS	305	dev_set_drvdata(&unit->device, dice);
	306	end:
	307	return err;
82fbb4f7 CL	308	error:
	309	snd_card_free(card);
	310	return err;
	311	}
	312
	313	static void dice_remove(struct fw_unit *unit)
	314	{
732d153f	315	struct snd_dice *dice = dev_get_drvdata(&unit->device);
82fbb4f7	316
12ed7192	317	/* No need to wait for releasing card object in this context. */
82fbb4f7 CL	318	snd_card_free_when_closed(dice->card);
	319	}
	320
	321	static void dice_bus_reset(struct fw_unit *unit)
	322	{
732d153f	323	struct snd_dice *dice = dev_get_drvdata(&unit->device);
82fbb4f7	324
7c2d4c0c TS	325	/* The handler address register becomes initialized. */
	326	snd_dice_transaction_reinit(dice);
	327
a8c558f6	328	mutex_lock(&dice->mutex);
9a02843c	329	snd_dice_stream_update_duplex(dice);
82fbb4f7 CL	330	mutex_unlock(&dice->mutex);
	331	}
	332
82fbb4f7 CL	333	#define DICE_INTERFACE 0x000001
	334
	335	static const struct ieee1394_device_id dice_id_table[] = {
	336	{
cbab328d CL	337	.match_flags = IEEE1394_MATCH_VERSION,
cbab328d CL	338	.version = DICE_INTERFACE,
82fbb4f7 CL	339	},
	340	{ }
	341	};
	342	MODULE_DEVICE_TABLE(ieee1394, dice_id_table);
	343
	344	static struct fw_driver dice_driver = {
	345	.driver = {
	346	.owner = THIS_MODULE,
	347	.name = KBUILD_MODNAME,
	348	.bus = &fw_bus_type,
	349	},
	350	.probe = dice_probe,
	351	.update = dice_bus_reset,
	352	.remove = dice_remove,
	353	.id_table = dice_id_table,
	354	};
	355
	356	static int __init alsa_dice_init(void)
	357	{
	358	return driver_register(&dice_driver.driver);
	359	}
	360
	361	static void __exit alsa_dice_exit(void)
	362	{
	363	driver_unregister(&dice_driver.driver);
	364	}
	365
	366	module_init(alsa_dice_init);
	367	module_exit(alsa_dice_exit);