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
10MODULE_DESCRIPTION("TASCAM FireWire series Driver");
11MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
12MODULE_LICENSE("GPL");
13
14static 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
44static 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(p: tscm->card->driver, q: "FW-TASCAM");
77 strcpy(p: tscm->card->shortname, q: model);
78 strcpy(p: tscm->card->mixername, q: model);
79 snprintf(buf: tscm->card->longname, size: sizeof(tscm->card->longname),
80 fmt: "TASCAM %s, GUID %08x%08x at %s, S%d", model,
81 fw_dev->config_rom[3], fw_dev->config_rom[4],
82 dev_name(dev: &tscm->unit->device), 100 << fw_dev->max_speed);
83
84 return 0;
85}
86
87static 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(lock: &tscm->mutex);
95 fw_unit_put(unit: tscm->unit);
96}
97
98static 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(parent: &unit->device, idx: -1, NULL, THIS_MODULE, extra_size: sizeof(*tscm), card_ret: &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(dev: &unit->device, data: 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;
150error:
151 snd_card_free(card);
152 return err;
153}
154
155static void snd_tscm_update(struct fw_unit *unit)
156{
157 struct snd_tscm *tscm = dev_get_drvdata(dev: &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(lock: &tscm->mutex);
164}
165
166static void snd_tscm_remove(struct fw_unit *unit)
167{
168 struct snd_tscm *tscm = dev_get_drvdata(dev: &unit->device);
169
170 // Block till all of ALSA character devices are released.
171 snd_card_free(card: tscm->card);
172}
173
174static 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};
211MODULE_DEVICE_TABLE(ieee1394, snd_tscm_id_table);
212
213static 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
225static int __init snd_tscm_init(void)
226{
227 return driver_register(drv: &tscm_driver.driver);
228}
229
230static void __exit snd_tscm_exit(void)
231{
232 driver_unregister(drv: &tscm_driver.driver);
233}
234
235module_init(snd_tscm_init);
236module_exit(snd_tscm_exit);
237

source code of linux/sound/firewire/tascam/tascam.c