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Release 4.7 sound/firewire/tascam/tascam.c

/*
 * tascam.c - a part of driver for TASCAM FireWire series
 *
 * Copyright (c) 2015 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include "tascam.h"

MODULE_DESCRIPTION("TASCAM FireWire series Driver");
MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
MODULE_LICENSE("GPL v2");


static struct snd_tscm_spec model_specs[] = {
	{
		.name = "FW-1884",
		.has_adat = true,
		.has_spdif = true,
		.pcm_capture_analog_channels = 8,
		.pcm_playback_analog_channels = 8,
		.midi_capture_ports = 4,
		.midi_playback_ports = 4,
        },
	{
		.name = "FW-1082",
		.has_adat = false,
		.has_spdif = true,
		.pcm_capture_analog_channels = 8,
		.pcm_playback_analog_channels = 2,
		.midi_capture_ports = 2,
		.midi_playback_ports = 2,
        },
	{
		.name = "FW-1804",
		.has_adat = true,
		.has_spdif = true,
		.pcm_capture_analog_channels = 8,
		.pcm_playback_analog_channels = 2,
		.midi_capture_ports = 2,
		.midi_playback_ports = 4,
        },
};


static int identify_model(struct snd_tscm *tscm) { struct fw_device *fw_dev = fw_parent_device(tscm->unit); const u32 *config_rom = fw_dev->config_rom; char model[9]; unsigned int i; u8 c; if (fw_dev->config_rom_length < 30) { dev_err(&tscm->unit->device, "Configuration ROM is too short.\n"); return -ENODEV; } /* Pick up model name from certain addresses. */ for (i = 0; i < 8; i++) { c = config_rom[28 + i / 4] >> (24 - 8 * (i % 4)); if (c == '\0') break; model[i] = c; } model[i] = '\0'; for (i = 0; i < ARRAY_SIZE(model_specs); i++) { if (strcmp(model, model_specs[i].name) == 0) { tscm->spec = &model_specs[i]; break; } } if (tscm->spec == NULL) return -ENODEV; strcpy(tscm->card->driver, "FW-TASCAM"); strcpy(tscm->card->shortname, model); strcpy(tscm->card->mixername, model); snprintf(tscm->card->longname, sizeof(tscm->card->longname), "TASCAM %s, GUID %08x%08x at %s, S%d", model, fw_dev->config_rom[3], fw_dev->config_rom[4], dev_name(&tscm->unit->device), 100 << fw_dev->max_speed); return 0; }

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takashi sakamototakashi sakamoto27799.64%266.67%
dan carpenterdan carpenter10.36%133.33%
Total278100.00%3100.00%


static void tscm_free(struct snd_tscm *tscm) { snd_tscm_transaction_unregister(tscm); snd_tscm_stream_destroy_duplex(tscm); fw_unit_put(tscm->unit); mutex_destroy(&tscm->mutex); }

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takashi sakamototakashi sakamoto36100.00%4100.00%
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static void tscm_card_free(struct snd_card *card) { tscm_free(card->private_data); }

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static void do_registration(struct work_struct *work) { struct snd_tscm *tscm = container_of(work, struct snd_tscm, dwork.work); int err; err = snd_card_new(&tscm->unit->device, -1, NULL, THIS_MODULE, 0, &tscm->card); if (err < 0) return; err = identify_model(tscm); if (err < 0) goto error; err = snd_tscm_transaction_register(tscm); if (err < 0) goto error; err = snd_tscm_stream_init_duplex(tscm); if (err < 0) goto error; snd_tscm_proc_init(tscm); err = snd_tscm_create_pcm_devices(tscm); if (err < 0) goto error; err = snd_tscm_create_midi_devices(tscm); if (err < 0) goto error; err = snd_tscm_create_hwdep_device(tscm); if (err < 0) goto error; err = snd_card_register(tscm->card); if (err < 0) goto error; /* * After registered, tscm instance can be released corresponding to * releasing the sound card instance. */ tscm->card->private_free = tscm_card_free; tscm->card->private_data = tscm; tscm->registered = true; return; error: snd_tscm_transaction_unregister(tscm); snd_tscm_stream_destroy_duplex(tscm); snd_card_free(tscm->card); dev_info(&tscm->unit->device, "Sound card registration failed: %d\n", err); }

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takashi sakamototakashi sakamoto240100.00%8100.00%
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static int snd_tscm_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry) { struct snd_tscm *tscm; /* Allocate this independent of sound card instance. */ tscm = kzalloc(sizeof(struct snd_tscm), GFP_KERNEL); if (tscm == NULL) return -ENOMEM; /* initialize myself */ tscm->unit = fw_unit_get(unit); dev_set_drvdata(&unit->device, tscm); mutex_init(&tscm->mutex); spin_lock_init(&tscm->lock); init_waitqueue_head(&tscm->hwdep_wait); /* Allocate and register this sound card later. */ INIT_DEFERRABLE_WORK(&tscm->dwork, do_registration); snd_fw_schedule_registration(unit, &tscm->dwork); return 0; }

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takashi sakamototakashi sakamoto114100.00%2100.00%
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static void snd_tscm_update(struct fw_unit *unit) { struct snd_tscm *tscm = dev_get_drvdata(&unit->device); /* Postpone a workqueue for deferred registration. */ if (!tscm->registered) snd_fw_schedule_registration(unit, &tscm->dwork); snd_tscm_transaction_reregister(tscm); /* * After registration, userspace can start packet streaming, then this * code block works fine. */ if (tscm->registered) { mutex_lock(&tscm->mutex); snd_tscm_stream_update_duplex(tscm); mutex_unlock(&tscm->mutex); } }

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static void snd_tscm_remove(struct fw_unit *unit) { struct snd_tscm *tscm = dev_get_drvdata(&unit->device); /* * 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(&tscm->dwork); if (tscm->registered) { /* No need to wait for releasing card object in this context. */ snd_card_free_when_closed(tscm->card); } else { /* Don't forget this case. */ tscm_free(tscm); } }

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takashi sakamototakashi sakamoto58100.00%2100.00%
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static const struct ieee1394_device_id snd_tscm_id_table[] = { { .match_flags = IEEE1394_MATCH_VENDOR_ID | IEEE1394_MATCH_SPECIFIER_ID, .vendor_id = 0x00022e, .specifier_id = 0x00022e, }, /* FE-08 requires reverse-engineering because it just has faders. */ {} }; MODULE_DEVICE_TABLE(ieee1394, snd_tscm_id_table); static struct fw_driver tscm_driver = { .driver = { .owner = THIS_MODULE, .name = "snd-firewire-tascam", .bus = &fw_bus_type, }, .probe = snd_tscm_probe, .update = snd_tscm_update, .remove = snd_tscm_remove, .id_table = snd_tscm_id_table, };
static int __init snd_tscm_init(void) { return driver_register(&tscm_driver.driver); }

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static void __exit snd_tscm_exit(void) { driver_unregister(&tscm_driver.driver); }

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module_init(snd_tscm_init); module_exit(snd_tscm_exit);

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takashi sakamototakashi sakamoto108999.91%1090.91%
dan carpenterdan carpenter10.09%19.09%
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