sound/firewire/dice/dice.c - kernel/msm-4.9 - Gitiles

 /*
  * 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);
	/*
	* 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);