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Embedded Linux Experts

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/*
 * bebob.c - a part of driver for BeBoB based devices
 *
 * Copyright (c) 2013-2014 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

/*
 * BeBoB is 'BridgeCo enhanced Breakout Box'. This is installed to firewire
 * devices with DM1000/DM1100/DM1500 chipset. It gives common way for host
 * system to handle BeBoB based devices.
 */

#include "bebob.h"

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

static int index[SNDRV_CARDS]	= SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS]	= SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS]	= SNDRV_DEFAULT_ENABLE_PNP;

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "card index");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "enable BeBoB sound card");

static DEFINE_MUTEX(devices_mutex);
static DECLARE_BITMAP(devices_used, SNDRV_CARDS);

/* Offsets from information register. */
#define INFO_OFFSET_BEBOB_VERSION	0x08
#define INFO_OFFSET_GUID		0x10
#define INFO_OFFSET_HW_MODEL_ID		0x18
#define INFO_OFFSET_HW_MODEL_REVISION	0x1c

#define VEN_EDIROL	0x000040ab
#define VEN_PRESONUS	0x00000a92
#define VEN_BRIDGECO	0x000007f5
#define VEN_MACKIE1	0x0000000f
#define VEN_MACKIE2	0x00000ff2
#define VEN_STANTON	0x00001260
#define VEN_TASCAM	0x0000022e
#define VEN_BEHRINGER	0x00001564
#define VEN_APOGEE	0x000003db
#define VEN_ESI		0x00000f1b
#define VEN_ACOUSTIC	0x00000002
#define VEN_CME		0x0000000a
#define VEN_PHONIC	0x00001496
#define VEN_LYNX	0x000019e5
#define VEN_ICON	0x00001a9e
#define VEN_PRISMSOUND	0x00001198
#define VEN_TERRATEC	0x00000aac
#define VEN_YAMAHA	0x0000a0de
#define VEN_FOCUSRITE	0x0000130e
#define VEN_MAUDIO1	0x00000d6c
#define VEN_MAUDIO2	0x000007f5
#define VEN_DIGIDESIGN	0x00a07e

#define MODEL_FOCUSRITE_SAFFIRE_BOTH	0x00000000
#define MODEL_MAUDIO_AUDIOPHILE_BOTH	0x00010060
#define MODEL_MAUDIO_FW1814		0x00010071
#define MODEL_MAUDIO_PROJECTMIX		0x00010091

static int
name_device(struct snd_bebob *bebob)
{
	struct fw_device *fw_dev = fw_parent_device(bebob->unit);
	char vendor[24] = {0};
	char model[32] = {0};
	u32 hw_id;
	u32 data[2] = {0};
	u32 revision;
	u32 version;
	int err;

	/* get vendor name from root directory */
	err = fw_csr_string(fw_dev->config_rom + 5, CSR_VENDOR,
			    vendor, sizeof(vendor));
	if (err < 0)
		goto end;

	/* get model name from unit directory */
	err = fw_csr_string(bebob->unit->directory, CSR_MODEL,
			    model, sizeof(model));
	if (err < 0)
		goto end;

	/* get hardware id */
	err = snd_bebob_read_quad(bebob->unit, INFO_OFFSET_HW_MODEL_ID,
				  &hw_id);
	if (err < 0)
		goto end;

	/* get hardware revision */
	err = snd_bebob_read_quad(bebob->unit, INFO_OFFSET_HW_MODEL_REVISION,
				  &revision);
	if (err < 0)
		goto end;

	/* get GUID */
	err = snd_bebob_read_block(bebob->unit, INFO_OFFSET_GUID,
				   data, sizeof(data));
	if (err < 0)
		goto end;

	err = snd_bebob_read_quad(bebob->unit, INFO_OFFSET_BEBOB_VERSION,
				  &version);
	if (err < 0)
		goto end;
	bebob->version = version;

	strcpy(bebob->card->driver, "BeBoB");
	strcpy(bebob->card->shortname, model);
	strcpy(bebob->card->mixername, model);
	snprintf(bebob->card->longname, sizeof(bebob->card->longname),
		 "%s %s (id:%d, rev:%d), GUID %08x%08x at %s, S%d",
		 vendor, model, hw_id, revision,
		 data[0], data[1], dev_name(&bebob->unit->device),
		 100 << fw_dev->max_speed);
end:
	return err;
}

static void bebob_free(struct snd_bebob *bebob)
{
	snd_bebob_stream_destroy_duplex(bebob);
	fw_unit_put(bebob->unit);

	kfree(bebob->maudio_special_quirk);

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

/*
 * 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
bebob_card_free(struct snd_card *card)
{
	struct snd_bebob *bebob = card->private_data;

	mutex_lock(&devices_mutex);
	clear_bit(bebob->card_index, devices_used);
	mutex_unlock(&devices_mutex);

	bebob_free(card->private_data);
}

static const struct snd_bebob_spec *
get_saffire_spec(struct fw_unit *unit)
{
	char name[24] = {0};

	if (fw_csr_string(unit->directory, CSR_MODEL, name, sizeof(name)) < 0)
		return NULL;

	if (strcmp(name, "SaffireLE") == 0)
		return &saffire_le_spec;
	else
		return &saffire_spec;
}

static bool
check_audiophile_booted(struct fw_unit *unit)
{
	char name[28] = {0};

	if (fw_csr_string(unit->directory, CSR_MODEL, name, sizeof(name)) < 0)
		return false;

	return strncmp(name, "FW Audiophile Bootloader", 24) != 0;
}

static void
do_registration(struct work_struct *work)
{
	struct snd_bebob *bebob =
			container_of(work, struct snd_bebob, dwork.work);
	unsigned int card_index;
	int err;

	if (bebob->registered)
		return;

	mutex_lock(&devices_mutex);

	for (card_index = 0; card_index < SNDRV_CARDS; card_index++) {
		if (!test_bit(card_index, devices_used) && enable[card_index])
			break;
	}
	if (card_index >= SNDRV_CARDS) {
		mutex_unlock(&devices_mutex);
		return;
	}

	err = snd_card_new(&bebob->unit->device, index[card_index],
			   id[card_index], THIS_MODULE, 0, &bebob->card);
	if (err < 0) {
		mutex_unlock(&devices_mutex);
		return;
	}

	err = name_device(bebob);
	if (err < 0)
		goto error;

	if (bebob->spec == &maudio_special_spec) {
		if (bebob->entry->model_id == MODEL_MAUDIO_FW1814)
			err = snd_bebob_maudio_special_discover(bebob, true);
		else
			err = snd_bebob_maudio_special_discover(bebob, false);
	} else {
		err = snd_bebob_stream_discover(bebob);
	}
	if (err < 0)
		goto error;

	err = snd_bebob_stream_init_duplex(bebob);
	if (err < 0)
		goto error;

	snd_bebob_proc_init(bebob);

	if (bebob->midi_input_ports > 0 || bebob->midi_output_ports > 0) {
		err = snd_bebob_create_midi_devices(bebob);
		if (err < 0)
			goto error;
	}

	err = snd_bebob_create_pcm_devices(bebob);
	if (err < 0)
		goto error;

	err = snd_bebob_create_hwdep_device(bebob);
	if (err < 0)
		goto error;

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

	set_bit(card_index, devices_used);
	mutex_unlock(&devices_mutex);

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

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

static int
bebob_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry)
{
	struct snd_bebob *bebob;
	const struct snd_bebob_spec *spec;

	if (entry->vendor_id == VEN_FOCUSRITE &&
	    entry->model_id == MODEL_FOCUSRITE_SAFFIRE_BOTH)
		spec = get_saffire_spec(unit);
	else if (entry->vendor_id == VEN_MAUDIO1 &&
		 entry->model_id == MODEL_MAUDIO_AUDIOPHILE_BOTH &&
		 !check_audiophile_booted(unit))
		spec = NULL;
	else
		spec = (const struct snd_bebob_spec *)entry->driver_data;

	if (spec == NULL) {
		if (entry->vendor_id == VEN_MAUDIO1 ||
		    entry->vendor_id == VEN_MAUDIO2)
			return snd_bebob_maudio_load_firmware(unit);
		else
			return -ENODEV;
	}

	/* Allocate this independent of sound card instance. */
	bebob = kzalloc(sizeof(struct snd_bebob), GFP_KERNEL);
	if (bebob == NULL)
		return -ENOMEM;

	bebob->unit = fw_unit_get(unit);
	bebob->entry = entry;
	bebob->spec = spec;
	dev_set_drvdata(&unit->device, bebob);

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

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

	if (entry->vendor_id != VEN_MAUDIO1 ||
	    (entry->model_id != MODEL_MAUDIO_FW1814 &&
	     entry->model_id != MODEL_MAUDIO_PROJECTMIX)) {
		snd_fw_schedule_registration(unit, &bebob->dwork);
	} else {
		/*
		 * This is a workaround. This bus reset seems to have an effect
		 * to make devices correctly handling transactions. Without
		 * this, the devices have gap_count mismatch. This causes much
		 * failure of transaction.
		 *
		 * Just after registration, user-land application receive
		 * signals from dbus and starts I/Os. To avoid I/Os till the
		 * future bus reset, registration is done in next update().
		 */
		fw_schedule_bus_reset(fw_parent_device(bebob->unit)->card,
				      false, true);
	}

	return 0;
}

/*
 * This driver doesn't update streams in bus reset handler.
 *
 * DM1000/ DM1100/DM1500 chipsets with BeBoB firmware transfer packets with
 * discontinued counter at bus reset. This discontinuity is immediately
 * detected in packet streaming layer, then it sets XRUN to PCM substream.
 *
 * ALSA PCM applications can know the XRUN by getting -EPIPE from PCM operation.
 * Then, they can recover the PCM substream by executing ioctl(2) with
 * SNDRV_PCM_IOCTL_PREPARE. 'struct snd_pcm_ops.prepare' is called and drivers
 * restart packet streaming.
 *
 * The above processing may be executed before this bus-reset handler is
 * executed. When this handler updates streams with current isochronous
 * channels, the streams already have the current ones.
 */
static void
bebob_update(struct fw_unit *unit)
{
	struct snd_bebob *bebob = dev_get_drvdata(&unit->device);

	if (bebob == NULL)
		return;

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

static void bebob_remove(struct fw_unit *unit)
{
	struct snd_bebob *bebob = dev_get_drvdata(&unit->device);

	if (bebob == NULL)
		return;

	/*
	 * 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(&bebob->dwork);

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

static const struct snd_bebob_rate_spec normal_rate_spec = {
	.get	= &snd_bebob_stream_get_rate,
	.set	= &snd_bebob_stream_set_rate
};
static const struct snd_bebob_spec spec_normal = {
	.clock	= NULL,
	.rate	= &normal_rate_spec,
	.meter	= NULL
};

static const struct ieee1394_device_id bebob_id_table[] = {
	/* Edirol, FA-66 */
	SND_BEBOB_DEV_ENTRY(VEN_EDIROL, 0x00010049, &spec_normal),
	/* Edirol, FA-101 */
	SND_BEBOB_DEV_ENTRY(VEN_EDIROL, 0x00010048, &spec_normal),
	/* Presonus, FIREBOX */
	SND_BEBOB_DEV_ENTRY(VEN_PRESONUS, 0x00010000, &spec_normal),
	/* PreSonus, FIREPOD/FP10 */
	SND_BEBOB_DEV_ENTRY(VEN_PRESONUS, 0x00010066, &spec_normal),
	/* PreSonus, Inspire1394 */
	SND_BEBOB_DEV_ENTRY(VEN_PRESONUS, 0x00010001, &spec_normal),
	/* BridgeCo, RDAudio1 */
	SND_BEBOB_DEV_ENTRY(VEN_BRIDGECO, 0x00010048, &spec_normal),
	/* BridgeCo, Audio5 */
	SND_BEBOB_DEV_ENTRY(VEN_BRIDGECO, 0x00010049, &spec_normal),
	/* Mackie, Onyx 1220/1620/1640 (Firewire I/O Card) */
	SND_BEBOB_DEV_ENTRY(VEN_MACKIE2, 0x00010065, &spec_normal),
	/* Mackie, d.2 (Firewire Option) */
	SND_BEBOB_DEV_ENTRY(VEN_MACKIE1, 0x00010067, &spec_normal),
	/* Stanton, ScratchAmp */
	SND_BEBOB_DEV_ENTRY(VEN_STANTON, 0x00000001, &spec_normal),
	/* Tascam, IF-FW DM */
	SND_BEBOB_DEV_ENTRY(VEN_TASCAM, 0x00010067, &spec_normal),
	/* Behringer, XENIX UFX 1204 */
	SND_BEBOB_DEV_ENTRY(VEN_BEHRINGER, 0x00001204, &spec_normal),
	/* Behringer, XENIX UFX 1604 */
	SND_BEBOB_DEV_ENTRY(VEN_BEHRINGER, 0x00001604, &spec_normal),
	/* Behringer, Digital Mixer X32 series (X-UF Card) */
	SND_BEBOB_DEV_ENTRY(VEN_BEHRINGER, 0x00000006, &spec_normal),
	/*  Behringer, F-Control Audio 1616 */
	SND_BEBOB_DEV_ENTRY(VEN_BEHRINGER, 0x001616, &spec_normal),
	/*  Behringer, F-Control Audio 610 */
	SND_BEBOB_DEV_ENTRY(VEN_BEHRINGER, 0x000610, &spec_normal),
	/* Apogee Electronics, Rosetta 200/400 (X-FireWire card) */
	/* Apogee Electronics, DA/AD/DD-16X (X-FireWire card) */
	SND_BEBOB_DEV_ENTRY(VEN_APOGEE, 0x00010048, &spec_normal),
	/* Apogee Electronics, Ensemble */
	SND_BEBOB_DEV_ENTRY(VEN_APOGEE, 0x00001eee, &spec_normal),
	/* ESI, Quatafire610 */
	SND_BEBOB_DEV_ENTRY(VEN_ESI, 0x00010064, &spec_normal),
	/* AcousticReality, eARMasterOne */
	SND_BEBOB_DEV_ENTRY(VEN_ACOUSTIC, 0x00000002, &spec_normal),
	/* CME, MatrixKFW */
	SND_BEBOB_DEV_ENTRY(VEN_CME, 0x00030000, &spec_normal),
	/* Phonic, Helix Board 12 MkII */
	SND_BEBOB_DEV_ENTRY(VEN_PHONIC, 0x00050000, &spec_normal),
	/* Phonic, Helix Board 18 MkII */
	SND_BEBOB_DEV_ENTRY(VEN_PHONIC, 0x00060000, &spec_normal),
	/* Phonic, Helix Board 24 MkII */
	SND_BEBOB_DEV_ENTRY(VEN_PHONIC, 0x00070000, &spec_normal),
	/* Phonic, Helix Board 12 Universal/18 Universal/24 Universal */
	SND_BEBOB_DEV_ENTRY(VEN_PHONIC, 0x00000000, &spec_normal),
	/* Lynx, Aurora 8/16 (LT-FW) */
	SND_BEBOB_DEV_ENTRY(VEN_LYNX, 0x00000001, &spec_normal),
	/* ICON, FireXon */
	SND_BEBOB_DEV_ENTRY(VEN_ICON, 0x00000001, &spec_normal),
	/* PrismSound, Orpheus */
	SND_BEBOB_DEV_ENTRY(VEN_PRISMSOUND, 0x00010048, &spec_normal),
	/* PrismSound, ADA-8XR */
	SND_BEBOB_DEV_ENTRY(VEN_PRISMSOUND, 0x0000ada8, &spec_normal),
	/* TerraTec Electronic GmbH, PHASE 88 Rack FW */
	SND_BEBOB_DEV_ENTRY(VEN_TERRATEC, 0x00000003, &phase88_rack_spec),
	/* TerraTec Electronic GmbH, PHASE 24 FW */
	SND_BEBOB_DEV_ENTRY(VEN_TERRATEC, 0x00000004, &yamaha_terratec_spec),
	/* TerraTec Electronic GmbH, Phase X24 FW */
	SND_BEBOB_DEV_ENTRY(VEN_TERRATEC, 0x00000007, &yamaha_terratec_spec),
	/* TerraTec Electronic GmbH, EWS MIC2/MIC8 */
	SND_BEBOB_DEV_ENTRY(VEN_TERRATEC, 0x00000005, &spec_normal),
	/* Terratec Electronic GmbH, Aureon 7.1 Firewire */
	SND_BEBOB_DEV_ENTRY(VEN_TERRATEC, 0x00000002, &spec_normal),
	/* Yamaha, GO44 */
	SND_BEBOB_DEV_ENTRY(VEN_YAMAHA, 0x0010000b, &yamaha_terratec_spec),
	/* YAMAHA, GO46 */
	SND_BEBOB_DEV_ENTRY(VEN_YAMAHA, 0x0010000c, &yamaha_terratec_spec),
	/* Focusrite, SaffirePro 26 I/O */
	SND_BEBOB_DEV_ENTRY(VEN_FOCUSRITE, 0x00000003, &saffirepro_26_spec),
	/* Focusrite, SaffirePro 10 I/O */
	SND_BEBOB_DEV_ENTRY(VEN_FOCUSRITE, 0x00000006, &saffirepro_10_spec),
	/* Focusrite, Saffire(no label and LE) */
	SND_BEBOB_DEV_ENTRY(VEN_FOCUSRITE, MODEL_FOCUSRITE_SAFFIRE_BOTH,
			    &saffire_spec),
	/* M-Audio, Firewire 410 */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO2, 0x00010058, NULL),	/* bootloader */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO2, 0x00010046, &maudio_fw410_spec),
	/* M-Audio, Firewire Audiophile */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, MODEL_MAUDIO_AUDIOPHILE_BOTH,
			    &maudio_audiophile_spec),
	/* M-Audio, Firewire Solo */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, 0x00010062, &maudio_solo_spec),
	/* M-Audio, Ozonic */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, 0x0000000a, &maudio_ozonic_spec),
	/* M-Audio NRV10 */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, 0x00010081, &maudio_nrv10_spec),
	/* M-Audio, ProFireLightbridge */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, 0x000100a1, &spec_normal),
	/* Firewire 1814 */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, 0x00010070, NULL),	/* bootloader */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, MODEL_MAUDIO_FW1814,
			    &maudio_special_spec),
	/* M-Audio ProjectMix */
	SND_BEBOB_DEV_ENTRY(VEN_MAUDIO1, MODEL_MAUDIO_PROJECTMIX,
			    &maudio_special_spec),
	/* Digidesign Mbox 2 Pro */
	SND_BEBOB_DEV_ENTRY(VEN_DIGIDESIGN, 0x0000a9, &spec_normal),
	/* IDs are unknown but able to be supported */
	/*  Apogee, Mini-ME Firewire */
	/*  Apogee, Mini-DAC Firewire */
	/*  Cakawalk, Sonar Power Studio 66 */
	/*  CME, UF400e */
	/*  ESI, Quotafire XL */
	/*  Infrasonic, DewX */
	/*  Infrasonic, Windy6 */
	/*  Mackie, Digital X Bus x.200 */
	/*  Mackie, Digital X Bus x.400 */
	/*  Phonic, HB 12 */
	/*  Phonic, HB 24 */
	/*  Phonic, HB 18 */
	/*  Phonic, FireFly 202 */
	/*  Phonic, FireFly 302 */
	/*  Rolf Spuler, Firewire Guitar */
	{}
};
MODULE_DEVICE_TABLE(ieee1394, bebob_id_table);

static struct fw_driver bebob_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "snd-bebob",
		.bus	= &fw_bus_type,
	},
	.probe    = bebob_probe,
	.update	  = bebob_update,
	.remove   = bebob_remove,
	.id_table = bebob_id_table,
};

static int __init
snd_bebob_init(void)
{
	return driver_register(&bebob_driver.driver);
}

static void __exit
snd_bebob_exit(void)
{
	driver_unregister(&bebob_driver.driver);
}

module_init(snd_bebob_init);
module_exit(snd_bebob_exit);