[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 OUI_LOUD		0x000ff2

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

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;
	u32 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 if (vendor == OUI_LOUD)
		category = LOUD_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	14	#define OUI_WEISS 0x001c6a
5d5563b1	15	#define OUI_LOUD 0x000ff2
a471fcde CL	16
	17	#define DICE_CATEGORY_ID 0x04
	18	#define WEISS_CATEGORY_ID 0x00
5d5563b1	19	#define LOUD_CATEGORY_ID 0x10
cbab328d CL	20
	21	static int dice_interface_check(struct fw_unit *unit)
	22	{
	23	static const int min_values[10] = {
	24	10, 0x64 / 4,
	25	10, 0x18 / 4,
	26	10, 0x18 / 4,
	27	0, 0,
	28	0, 0,
	29	};
	30	struct fw_device *device = fw_parent_device(unit);
	31	struct fw_csr_iterator it;
7c2d4c0c	32	int key, val, vendor = -1, model = -1, err;
a471fcde	33	unsigned int category, i;
cbc6f280 TS	34	__be32 *pointers;
cbc6f280 TS	35	u32 value;
cbab328d CL	36	__be32 version;
cbab328d CL	37
7c2d4c0c TS	38	pointers = kmalloc_array(ARRAY_SIZE(min_values), sizeof(__be32),
	39	GFP_KERNEL);
	40	if (pointers == NULL)
	41	return -ENOMEM;
	42
cbab328d CL	43	/*
	44	* Check that GUID and unit directory are constructed according to DICE
	45	* rules, i.e., that the specifier ID is the GUID's OUI, and that the
a471fcde CL	46	* GUID chip ID consists of the 8-bit category ID, the 10-bit product
a471fcde CL	47	* ID, and a 22-bit serial number.
cbab328d CL	48	*/
cbab328d CL	49	fw_csr_iterator_init(&it, unit->directory);
7c2d4c0c	50	while (fw_csr_iterator_next(&it, &key, &val)) {
cbab328d CL	51	switch (key) {
cbab328d CL	52	case CSR_SPECIFIER_ID:
7c2d4c0c	53	vendor = val;
cbab328d CL	54	break;
cbab328d CL	55	case CSR_MODEL:
7c2d4c0c	56	model = val;
cbab328d CL	57	break;
	58	}
	59	}
a471fcde CL	60	if (vendor == OUI_WEISS)
a471fcde CL	61	category = WEISS_CATEGORY_ID;
5d5563b1 TS	62	else if (vendor == OUI_LOUD)
5d5563b1 TS	63	category = LOUD_CATEGORY_ID;
a471fcde CL	64	else
	65	category = DICE_CATEGORY_ID;
	66	if (device->config_rom[3] != ((vendor << 8) \| category) \|\|
7c2d4c0c TS	67	device->config_rom[4] >> 22 != model) {
	68	err = -ENODEV;
	69	goto end;
	70	}
cbab328d CL	71
	72	/*
	73	* Check that the sub address spaces exist and are located inside the
	74	* private address space. The minimum values are chosen so that all
	75	* minimally required registers are included.
	76	*/
	77	err = snd_fw_transaction(unit, TCODE_READ_BLOCK_REQUEST,
7c2d4c0c TS	78	DICE_PRIVATE_SPACE, pointers,
	79	sizeof(__be32) * ARRAY_SIZE(min_values), 0);
	80	if (err < 0) {
	81	err = -ENODEV;
	82	goto end;
	83	}
	84	for (i = 0; i < ARRAY_SIZE(min_values); ++i) {
cbab328d	85	value = be32_to_cpu(pointers[i]);
7c2d4c0c TS	86	if (value < min_values[i] \|\| value >= 0x40000) {
	87	err = -ENODEV;
	88	goto end;
	89	}
cbab328d CL	90	}
	91
	92	/*
	93	* Check that the implemented DICE driver specification major version
	94	* number matches.
	95	*/
	96	err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
	97	DICE_PRIVATE_SPACE +
	98	be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION,
1b70485f	99	&version, 4, 0);
7c2d4c0c TS	100	if (err < 0) {
	101	err = -ENODEV;
	102	goto end;
	103	}
cbab328d CL	104	if ((version & cpu_to_be32(0xff000000)) != cpu_to_be32(0x01000000)) {
	105	dev_err(&unit->device,
	106	"unknown DICE version: 0x%08x\n", be32_to_cpu(version));
7c2d4c0c TS	107	err = -ENODEV;
7c2d4c0c TS	108	goto end;
cbab328d	109	}
7c2d4c0c TS	110	end:
7c2d4c0c TS	111	return err;
cbab328d CL	112	}
cbab328d CL	113
6eb6c81e TS	114	static int highest_supported_mode_rate(struct snd_dice *dice,
6eb6c81e TS	115	unsigned int mode, unsigned int *rate)
15a75c8b	116	{
6eb6c81e	117	unsigned int i, m;
15a75c8b	118
6eb6c81e TS	119	for (i = ARRAY_SIZE(snd_dice_rates); i > 0; i--) {
	120	*rate = snd_dice_rates[i - 1];
	121	if (snd_dice_stream_get_rate_mode(dice, *rate, &m) < 0)
	122	continue;
	123	if (mode == m)
	124	break;
	125	}
	126	if (i == 0)
	127	return -EINVAL;
15a75c8b	128
6eb6c81e	129	return 0;
15a75c8b CL	130	}
15a75c8b CL	131
732d153f	132	static int dice_read_mode_params(struct snd_dice *dice, unsigned int mode)
15a75c8b CL	133	{
15a75c8b CL	134	__be32 values[2];
6eb6c81e TS	135	unsigned int rate;
6eb6c81e TS	136	int err;
15a75c8b	137
6eb6c81e	138	if (highest_supported_mode_rate(dice, mode, &rate) < 0) {
9a02843c TS	139	dice->tx_channels[mode] = 0;
9a02843c TS	140	dice->tx_midi_ports[mode] = 0;
15a75c8b CL	141	dice->rx_channels[mode] = 0;
	142	dice->rx_midi_ports[mode] = 0;
	143	return 0;
	144	}
	145
6eb6c81e	146	err = snd_dice_transaction_set_rate(dice, rate);
15a75c8b CL	147	if (err < 0)
	148	return err;
	149
9a02843c TS	150	err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO,
	151	values, sizeof(values));
	152	if (err < 0)
	153	return err;
	154
	155	dice->tx_channels[mode] = be32_to_cpu(values[0]);
	156	dice->tx_midi_ports[mode] = be32_to_cpu(values[1]);
	157
7c2d4c0c TS	158	err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO,
7c2d4c0c TS	159	values, sizeof(values));
15a75c8b CL	160	if (err < 0)
	161	return err;
	162
	163	dice->rx_channels[mode] = be32_to_cpu(values[0]);
	164	dice->rx_midi_ports[mode] = be32_to_cpu(values[1]);
	165
	166	return 0;
	167	}
	168
732d153f	169	static int dice_read_params(struct snd_dice *dice)
82fbb4f7	170	{
a0301998	171	__be32 value;
15a75c8b	172	int mode, err;
82fbb4f7	173
a0301998	174	/* some very old firmwares don't tell about their clock support */
7c2d4c0c TS	175	if (dice->clock_caps > 0) {
	176	err = snd_dice_transaction_read_global(dice,
	177	GLOBAL_CLOCK_CAPABILITIES,
	178	&value, 4);
a0301998 CL	179	if (err < 0)
	180	return err;
	181	dice->clock_caps = be32_to_cpu(value);
	182	} else {
	183	/* this should be supported by any device */
	184	dice->clock_caps = CLOCK_CAP_RATE_44100 \|
	185	CLOCK_CAP_RATE_48000 \|
	186	CLOCK_CAP_SOURCE_ARX1 \|
	187	CLOCK_CAP_SOURCE_INTERNAL;
	188	}
	189
15a75c8b CL	190	for (mode = 2; mode >= 0; --mode) {
	191	err = dice_read_mode_params(dice, mode);
	192	if (err < 0)
	193	return err;
	194	}
	195
82fbb4f7 CL	196	return 0;
	197	}
	198
732d153f	199	static void dice_card_strings(struct snd_dice *dice)
82fbb4f7 CL	200	{
	201	struct snd_card *card = dice->card;
	202	struct fw_device *dev = fw_parent_device(dice->unit);
	203	char vendor[32], model[32];
	204	unsigned int i;
	205	int err;
	206
	207	strcpy(card->driver, "DICE");
	208
	209	strcpy(card->shortname, "DICE");
	210	BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname));
7c2d4c0c TS	211	err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME,
	212	card->shortname,
	213	sizeof(card->shortname));
82fbb4f7 CL	214	if (err >= 0) {
	215	/* DICE strings are returned in "always-wrong" endianness */
	216	BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0);
	217	for (i = 0; i < sizeof(card->shortname); i += 4)
	218	swab32s((u32 *)&card->shortname[i]);
	219	card->shortname[sizeof(card->shortname) - 1] = '\0';
	220	}
	221
	222	strcpy(vendor, "?");
	223	fw_csr_string(dev->config_rom + 5, CSR_VENDOR, vendor, sizeof(vendor));
	224	strcpy(model, "?");
	225	fw_csr_string(dice->unit->directory, CSR_MODEL, model, sizeof(model));
	226	snprintf(card->longname, sizeof(card->longname),
cbab328d CL	227	"%s %s (serial %u) at %s, S%d",
cbab328d CL	228	vendor, model, dev->config_rom[4] & 0x3fffff,
82fbb4f7 CL	229	dev_name(&dice->unit->device), 100 << dev->max_speed);
	230
	231	strcpy(card->mixername, "DICE");
	232	}
	233
12ed7192 TS	234	/*
	235	* This module releases the FireWire unit data after all ALSA character devices
	236	* are released by applications. This is for releasing stream data or finishing
	237	* transactions safely. Thus at returning from .remove(), this module still keep
	238	* references for the unit.
	239	*/
7c2d4c0c TS	240	static void dice_card_free(struct snd_card *card)
	241	{
	242	struct snd_dice *dice = card->private_data;
	243
dec84316	244	snd_dice_stream_destroy_duplex(dice);
7c2d4c0c	245	snd_dice_transaction_destroy(dice);
12ed7192 TS	246	fw_unit_put(dice->unit);
12ed7192 TS	247
7c2d4c0c TS	248	mutex_destroy(&dice->mutex);
	249	}
	250
82fbb4f7 CL	251	static int dice_probe(struct fw_unit unit, const struct ieee1394_device_id id)
	252	{
	253	struct snd_card *card;
732d153f	254	struct snd_dice *dice;
82fbb4f7 CL	255	int err;
82fbb4f7 CL	256
cbab328d CL	257	err = dice_interface_check(unit);
cbab328d CL	258	if (err < 0)
7c2d4c0c	259	goto end;
cbab328d	260
06b45f00 TI	261	err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE,
06b45f00 TI	262	sizeof(*dice), &card);
82fbb4f7	263	if (err < 0)
7c2d4c0c	264	goto end;
82fbb4f7 CL	265
	266	dice = card->private_data;
	267	dice->card = card;
12ed7192	268	dice->unit = fw_unit_get(unit);
7c2d4c0c TS	269	card->private_free = dice_card_free;
7c2d4c0c TS	270
0c29c918	271	spin_lock_init(&dice->lock);
82fbb4f7	272	mutex_init(&dice->mutex);
15a75c8b	273	init_completion(&dice->clock_accepted);
0c29c918	274	init_waitqueue_head(&dice->hwdep_wait);
82fbb4f7	275
7c2d4c0c	276	err = snd_dice_transaction_init(dice);
82fbb4f7	277	if (err < 0)
7c2d4c0c	278	goto error;
5ea4018e CL	279
	280	err = dice_read_params(dice);
	281	if (err < 0)
7c2d4c0c	282	goto error;
82fbb4f7 CL	283
	284	dice_card_strings(dice);
	285
c50fb91f	286	err = snd_dice_create_pcm(dice);
82fbb4f7 CL	287	if (err < 0)
	288	goto error;
	289
19af57b4	290	err = snd_dice_create_hwdep(dice);
82fbb4f7 CL	291	if (err < 0)
	292	goto error;
	293
04d426a0	294	snd_dice_create_proc(dice);
c614475b	295
a113ff88 TS	296	err = snd_dice_create_midi(dice);
	297	if (err < 0)
	298	goto error;
	299
9a02843c	300	err = snd_dice_stream_init_duplex(dice);
82fbb4f7 CL	301	if (err < 0)
82fbb4f7 CL	302	goto error;
82fbb4f7	303
7c2d4c0c TS	304	err = snd_card_register(card);
7c2d4c0c TS	305	if (err < 0) {
9a02843c	306	snd_dice_stream_destroy_duplex(dice);
7c2d4c0c TS	307	goto error;
7c2d4c0c TS	308	}
82fbb4f7	309
7c2d4c0c TS	310	dev_set_drvdata(&unit->device, dice);
	311	end:
	312	return err;
82fbb4f7 CL	313	error:
	314	snd_card_free(card);
	315	return err;
	316	}
	317
	318	static void dice_remove(struct fw_unit *unit)
	319	{
732d153f	320	struct snd_dice *dice = dev_get_drvdata(&unit->device);
82fbb4f7	321
12ed7192	322	/* No need to wait for releasing card object in this context. */
82fbb4f7 CL	323	snd_card_free_when_closed(dice->card);
	324	}
	325
	326	static void dice_bus_reset(struct fw_unit *unit)
	327	{
732d153f	328	struct snd_dice *dice = dev_get_drvdata(&unit->device);
82fbb4f7	329
7c2d4c0c TS	330	/* The handler address register becomes initialized. */
	331	snd_dice_transaction_reinit(dice);
	332
a8c558f6	333	mutex_lock(&dice->mutex);
9a02843c	334	snd_dice_stream_update_duplex(dice);
82fbb4f7 CL	335	mutex_unlock(&dice->mutex);
	336	}
	337
82fbb4f7 CL	338	#define DICE_INTERFACE 0x000001
	339
	340	static const struct ieee1394_device_id dice_id_table[] = {
	341	{
cbab328d CL	342	.match_flags = IEEE1394_MATCH_VERSION,
cbab328d CL	343	.version = DICE_INTERFACE,
82fbb4f7 CL	344	},
	345	{ }
	346	};
	347	MODULE_DEVICE_TABLE(ieee1394, dice_id_table);
	348
	349	static struct fw_driver dice_driver = {
	350	.driver = {
	351	.owner = THIS_MODULE,
	352	.name = KBUILD_MODNAME,
	353	.bus = &fw_bus_type,
	354	},
	355	.probe = dice_probe,
	356	.update = dice_bus_reset,
	357	.remove = dice_remove,
	358	.id_table = dice_id_table,
	359	};
	360
	361	static int __init alsa_dice_init(void)
	362	{
	363	return driver_register(&dice_driver.driver);
	364	}
	365
	366	static void __exit alsa_dice_exit(void)
	367	{
	368	driver_unregister(&dice_driver.driver);
	369	}
	370
	371	module_init(alsa_dice_init);
	372	module_exit(alsa_dice_exit);