1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * motu.c - a part of driver for MOTU FireWire series
4  *
5  * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
6  */
7 
8 #include "motu.h"
9 
10 #define OUI_MOTU	0x0001f2
11 
12 MODULE_DESCRIPTION("MOTU FireWire driver");
13 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
14 MODULE_LICENSE("GPL v2");
15 
16 const unsigned int snd_motu_clock_rates[SND_MOTU_CLOCK_RATE_COUNT] = {
17 	/* mode 0 */
18 	[0] =  44100,
19 	[1] =  48000,
20 	/* mode 1 */
21 	[2] =  88200,
22 	[3] =  96000,
23 	/* mode 2 */
24 	[4] = 176400,
25 	[5] = 192000,
26 };
27 
name_card(struct snd_motu * motu)28 static void name_card(struct snd_motu *motu)
29 {
30 	struct fw_device *fw_dev = fw_parent_device(motu->unit);
31 	struct fw_csr_iterator it;
32 	int key, val;
33 	u32 version = 0;
34 
35 	fw_csr_iterator_init(&it, motu->unit->directory);
36 	while (fw_csr_iterator_next(&it, &key, &val)) {
37 		switch (key) {
38 		case CSR_MODEL:
39 			version = val;
40 			break;
41 		}
42 	}
43 
44 	strcpy(motu->card->driver, "FW-MOTU");
45 	strcpy(motu->card->shortname, motu->spec->name);
46 	strcpy(motu->card->mixername, motu->spec->name);
47 	snprintf(motu->card->longname, sizeof(motu->card->longname),
48 		 "MOTU %s (version:%06x), GUID %08x%08x at %s, S%d",
49 		 motu->spec->name, version,
50 		 fw_dev->config_rom[3], fw_dev->config_rom[4],
51 		 dev_name(&motu->unit->device), 100 << fw_dev->max_speed);
52 }
53 
motu_card_free(struct snd_card * card)54 static void motu_card_free(struct snd_card *card)
55 {
56 	struct snd_motu *motu = card->private_data;
57 
58 	snd_motu_transaction_unregister(motu);
59 	snd_motu_stream_destroy_duplex(motu);
60 
61 	mutex_destroy(&motu->mutex);
62 	fw_unit_put(motu->unit);
63 }
64 
motu_probe(struct fw_unit * unit,const struct ieee1394_device_id * entry)65 static int motu_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry)
66 {
67 	struct snd_card *card;
68 	struct snd_motu *motu;
69 	int err;
70 
71 	err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*motu), &card);
72 	if (err < 0)
73 		return err;
74 	card->private_free = motu_card_free;
75 
76 	motu = card->private_data;
77 	motu->unit = fw_unit_get(unit);
78 	dev_set_drvdata(&unit->device, motu);
79 	motu->card = card;
80 
81 	motu->spec = (const struct snd_motu_spec *)entry->driver_data;
82 	mutex_init(&motu->mutex);
83 	spin_lock_init(&motu->lock);
84 	init_waitqueue_head(&motu->hwdep_wait);
85 
86 	name_card(motu);
87 
88 	err = snd_motu_transaction_register(motu);
89 	if (err < 0)
90 		goto error;
91 
92 	err = snd_motu_stream_init_duplex(motu);
93 	if (err < 0)
94 		goto error;
95 
96 	snd_motu_proc_init(motu);
97 
98 	err = snd_motu_create_pcm_devices(motu);
99 	if (err < 0)
100 		goto error;
101 
102 	if ((motu->spec->flags & SND_MOTU_SPEC_RX_MIDI_2ND_Q) ||
103 	    (motu->spec->flags & SND_MOTU_SPEC_RX_MIDI_3RD_Q) ||
104 	    (motu->spec->flags & SND_MOTU_SPEC_TX_MIDI_2ND_Q) ||
105 	    (motu->spec->flags & SND_MOTU_SPEC_TX_MIDI_3RD_Q)) {
106 		err = snd_motu_create_midi_devices(motu);
107 		if (err < 0)
108 			goto error;
109 	}
110 
111 	err = snd_motu_create_hwdep_device(motu);
112 	if (err < 0)
113 		goto error;
114 
115 	if (motu->spec->flags & SND_MOTU_SPEC_REGISTER_DSP) {
116 		err = snd_motu_register_dsp_message_parser_new(motu);
117 		if (err < 0)
118 			goto error;
119 	} else if (motu->spec->flags & SND_MOTU_SPEC_COMMAND_DSP) {
120 		err = snd_motu_command_dsp_message_parser_new(motu);
121 		if (err < 0)
122 			goto error;
123 	}
124 
125 	err = snd_card_register(card);
126 	if (err < 0)
127 		goto error;
128 
129 	return 0;
130 error:
131 	snd_card_free(card);
132 	return err;
133 }
134 
motu_remove(struct fw_unit * unit)135 static void motu_remove(struct fw_unit *unit)
136 {
137 	struct snd_motu *motu = dev_get_drvdata(&unit->device);
138 
139 	// Block till all of ALSA character devices are released.
140 	snd_card_free(motu->card);
141 }
142 
motu_bus_update(struct fw_unit * unit)143 static void motu_bus_update(struct fw_unit *unit)
144 {
145 	struct snd_motu *motu = dev_get_drvdata(&unit->device);
146 
147 	/* The handler address register becomes initialized. */
148 	snd_motu_transaction_reregister(motu);
149 }
150 
151 #define SND_MOTU_DEV_ENTRY(model, data)			\
152 {							\
153 	.match_flags	= IEEE1394_MATCH_VENDOR_ID |	\
154 			  IEEE1394_MATCH_SPECIFIER_ID |	\
155 			  IEEE1394_MATCH_VERSION,	\
156 	.vendor_id	= OUI_MOTU,			\
157 	.specifier_id	= OUI_MOTU,			\
158 	.version	= model,			\
159 	.driver_data	= (kernel_ulong_t)data,		\
160 }
161 
162 static const struct ieee1394_device_id motu_id_table[] = {
163 	SND_MOTU_DEV_ENTRY(0x000001, &snd_motu_spec_828),
164 	SND_MOTU_DEV_ENTRY(0x000002, &snd_motu_spec_896),
165 	SND_MOTU_DEV_ENTRY(0x000003, &snd_motu_spec_828mk2),
166 	SND_MOTU_DEV_ENTRY(0x000005, &snd_motu_spec_896hd),
167 	SND_MOTU_DEV_ENTRY(0x000009, &snd_motu_spec_traveler),
168 	SND_MOTU_DEV_ENTRY(0x00000d, &snd_motu_spec_ultralite),
169 	SND_MOTU_DEV_ENTRY(0x00000f, &snd_motu_spec_8pre),
170 	SND_MOTU_DEV_ENTRY(0x000015, &snd_motu_spec_828mk3_fw), // FireWire only.
171 	SND_MOTU_DEV_ENTRY(0x000019, &snd_motu_spec_ultralite_mk3), // FireWire only.
172 	SND_MOTU_DEV_ENTRY(0x00001b, &snd_motu_spec_traveler_mk3),
173 	SND_MOTU_DEV_ENTRY(0x000030, &snd_motu_spec_ultralite_mk3), // Hybrid.
174 	SND_MOTU_DEV_ENTRY(0x000035, &snd_motu_spec_828mk3_hybrid), // Hybrid.
175 	SND_MOTU_DEV_ENTRY(0x000033, &snd_motu_spec_audio_express),
176 	SND_MOTU_DEV_ENTRY(0x000039, &snd_motu_spec_track16),
177 	SND_MOTU_DEV_ENTRY(0x000045, &snd_motu_spec_4pre),
178 	{ }
179 };
180 MODULE_DEVICE_TABLE(ieee1394, motu_id_table);
181 
182 static struct fw_driver motu_driver = {
183 	.driver   = {
184 		.owner	= THIS_MODULE,
185 		.name	= KBUILD_MODNAME,
186 		.bus	= &fw_bus_type,
187 	},
188 	.probe    = motu_probe,
189 	.update   = motu_bus_update,
190 	.remove   = motu_remove,
191 	.id_table = motu_id_table,
192 };
193 
alsa_motu_init(void)194 static int __init alsa_motu_init(void)
195 {
196 	return driver_register(&motu_driver.driver);
197 }
198 
alsa_motu_exit(void)199 static void __exit alsa_motu_exit(void)
200 {
201 	driver_unregister(&motu_driver.driver);
202 }
203 
204 module_init(alsa_motu_init);
205 module_exit(alsa_motu_exit);
206