xref: /openbmc/linux/sound/firewire/tascam/tascam.c (revision 81c29435)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * tascam.c - a part of driver for TASCAM FireWire series
4  *
5  * Copyright (c) 2015 Takashi Sakamoto
6  */
7 
8 #include "tascam.h"
9 
10 MODULE_DESCRIPTION("TASCAM FireWire series Driver");
11 MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
12 MODULE_LICENSE("GPL");
13 
14 static const struct snd_tscm_spec model_specs[] = {
15 	{
16 		.name = "FW-1884",
17 		.has_adat = true,
18 		.has_spdif = true,
19 		.pcm_capture_analog_channels = 8,
20 		.pcm_playback_analog_channels = 8,
21 		.midi_capture_ports = 4,
22 		.midi_playback_ports = 4,
23 	},
24 	{
25 		.name = "FW-1082",
26 		.has_adat = false,
27 		.has_spdif = true,
28 		.pcm_capture_analog_channels = 8,
29 		.pcm_playback_analog_channels = 2,
30 		.midi_capture_ports = 2,
31 		.midi_playback_ports = 2,
32 	},
33 	{
34 		.name = "FW-1804",
35 		.has_adat = true,
36 		.has_spdif = true,
37 		.pcm_capture_analog_channels = 8,
38 		.pcm_playback_analog_channels = 2,
39 		.midi_capture_ports = 2,
40 		.midi_playback_ports = 4,
41 	},
42 };
43 
identify_model(struct snd_tscm * tscm)44 static int identify_model(struct snd_tscm *tscm)
45 {
46 	struct fw_device *fw_dev = fw_parent_device(tscm->unit);
47 	const u32 *config_rom = fw_dev->config_rom;
48 	char model[9];
49 	unsigned int i;
50 	u8 c;
51 
52 	if (fw_dev->config_rom_length < 30) {
53 		dev_err(&tscm->unit->device,
54 			"Configuration ROM is too short.\n");
55 		return -ENODEV;
56 	}
57 
58 	/* Pick up model name from certain addresses. */
59 	for (i = 0; i < 8; i++) {
60 		c = config_rom[28 + i / 4] >> (24 - 8 * (i % 4));
61 		if (c == '\0')
62 			break;
63 		model[i] = c;
64 	}
65 	model[i] = '\0';
66 
67 	for (i = 0; i < ARRAY_SIZE(model_specs); i++) {
68 		if (strcmp(model, model_specs[i].name) == 0) {
69 			tscm->spec = &model_specs[i];
70 			break;
71 		}
72 	}
73 	if (tscm->spec == NULL)
74 		return -ENODEV;
75 
76 	strcpy(tscm->card->driver, "FW-TASCAM");
77 	strcpy(tscm->card->shortname, model);
78 	strcpy(tscm->card->mixername, model);
79 	snprintf(tscm->card->longname, sizeof(tscm->card->longname),
80 		 "TASCAM %s, GUID %08x%08x at %s, S%d", model,
81 		 fw_dev->config_rom[3], fw_dev->config_rom[4],
82 		 dev_name(&tscm->unit->device), 100 << fw_dev->max_speed);
83 
84 	return 0;
85 }
86 
tscm_card_free(struct snd_card * card)87 static void tscm_card_free(struct snd_card *card)
88 {
89 	struct snd_tscm *tscm = card->private_data;
90 
91 	snd_tscm_transaction_unregister(tscm);
92 	snd_tscm_stream_destroy_duplex(tscm);
93 
94 	mutex_destroy(&tscm->mutex);
95 	fw_unit_put(tscm->unit);
96 }
97 
snd_tscm_probe(struct fw_unit * unit,const struct ieee1394_device_id * entry)98 static int snd_tscm_probe(struct fw_unit *unit,
99 			   const struct ieee1394_device_id *entry)
100 {
101 	struct snd_card *card;
102 	struct snd_tscm *tscm;
103 	int err;
104 
105 	err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*tscm), &card);
106 	if (err < 0)
107 		return err;
108 	card->private_free = tscm_card_free;
109 
110 	tscm = card->private_data;
111 	tscm->unit = fw_unit_get(unit);
112 	dev_set_drvdata(&unit->device, tscm);
113 	tscm->card = card;
114 
115 	mutex_init(&tscm->mutex);
116 	spin_lock_init(&tscm->lock);
117 	init_waitqueue_head(&tscm->hwdep_wait);
118 
119 	err = identify_model(tscm);
120 	if (err < 0)
121 		goto error;
122 
123 	err = snd_tscm_transaction_register(tscm);
124 	if (err < 0)
125 		goto error;
126 
127 	err = snd_tscm_stream_init_duplex(tscm);
128 	if (err < 0)
129 		goto error;
130 
131 	snd_tscm_proc_init(tscm);
132 
133 	err = snd_tscm_create_pcm_devices(tscm);
134 	if (err < 0)
135 		goto error;
136 
137 	err = snd_tscm_create_midi_devices(tscm);
138 	if (err < 0)
139 		goto error;
140 
141 	err = snd_tscm_create_hwdep_device(tscm);
142 	if (err < 0)
143 		goto error;
144 
145 	err = snd_card_register(card);
146 	if (err < 0)
147 		goto error;
148 
149 	return 0;
150 error:
151 	snd_card_free(card);
152 	return err;
153 }
154 
snd_tscm_update(struct fw_unit * unit)155 static void snd_tscm_update(struct fw_unit *unit)
156 {
157 	struct snd_tscm *tscm = dev_get_drvdata(&unit->device);
158 
159 	snd_tscm_transaction_reregister(tscm);
160 
161 	mutex_lock(&tscm->mutex);
162 	snd_tscm_stream_update_duplex(tscm);
163 	mutex_unlock(&tscm->mutex);
164 }
165 
snd_tscm_remove(struct fw_unit * unit)166 static void snd_tscm_remove(struct fw_unit *unit)
167 {
168 	struct snd_tscm *tscm = dev_get_drvdata(&unit->device);
169 
170 	// Block till all of ALSA character devices are released.
171 	snd_card_free(tscm->card);
172 }
173 
174 static const struct ieee1394_device_id snd_tscm_id_table[] = {
175 	// Tascam, FW-1884.
176 	{
177 		.match_flags = IEEE1394_MATCH_VENDOR_ID |
178 			       IEEE1394_MATCH_SPECIFIER_ID |
179 			       IEEE1394_MATCH_VERSION,
180 		.vendor_id = 0x00022e,
181 		.specifier_id = 0x00022e,
182 		.version = 0x800000,
183 	},
184 	// Tascam, FE-8 (.version = 0x800001)
185 	// This kernel module doesn't support FE-8 because the most of features
186 	// can be implemented in userspace without any specific support of this
187 	// module.
188 	//
189 	// .version = 0x800002 is unknown.
190 	//
191 	// Tascam, FW-1082.
192 	{
193 		.match_flags = IEEE1394_MATCH_VENDOR_ID |
194 			       IEEE1394_MATCH_SPECIFIER_ID |
195 			       IEEE1394_MATCH_VERSION,
196 		.vendor_id = 0x00022e,
197 		.specifier_id = 0x00022e,
198 		.version = 0x800003,
199 	},
200 	// Tascam, FW-1804.
201 	{
202 		.match_flags = IEEE1394_MATCH_VENDOR_ID |
203 			       IEEE1394_MATCH_SPECIFIER_ID |
204 			       IEEE1394_MATCH_VERSION,
205 		.vendor_id = 0x00022e,
206 		.specifier_id = 0x00022e,
207 		.version = 0x800004,
208 	},
209 	{}
210 };
211 MODULE_DEVICE_TABLE(ieee1394, snd_tscm_id_table);
212 
213 static struct fw_driver tscm_driver = {
214 	.driver = {
215 		.owner = THIS_MODULE,
216 		.name = KBUILD_MODNAME,
217 		.bus = &fw_bus_type,
218 	},
219 	.probe    = snd_tscm_probe,
220 	.update   = snd_tscm_update,
221 	.remove   = snd_tscm_remove,
222 	.id_table = snd_tscm_id_table,
223 };
224 
snd_tscm_init(void)225 static int __init snd_tscm_init(void)
226 {
227 	return driver_register(&tscm_driver.driver);
228 }
229 
snd_tscm_exit(void)230 static void __exit snd_tscm_exit(void)
231 {
232 	driver_unregister(&tscm_driver.driver);
233 }
234 
235 module_init(snd_tscm_init);
236 module_exit(snd_tscm_exit);
237