summaryrefslogtreecommitdiffstats
path: root/sound/firewire/digi00x/digi00x.c
blob: 1f5e1d23f31a7132a5dfb5f3f34468b1517a89d0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/*
 * digi00x.c - a part of driver for Digidesign Digi 002/003 family
 *
 * Copyright (c) 2014-2015 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include "digi00x.h"

MODULE_DESCRIPTION("Digidesign Digi 002/003 family Driver");
MODULE_AUTHOR("Takashi Sakamoto <o-takashi@sakamocchi.jp>");
MODULE_LICENSE("GPL v2");

#define VENDOR_DIGIDESIGN	0x00a07e
#define MODEL_CONSOLE		0x000001
#define MODEL_RACK		0x000002

static int name_card(struct snd_dg00x *dg00x)
{
	struct fw_device *fw_dev = fw_parent_device(dg00x->unit);
	char name[32] = {0};
	char *model;
	int err;

	err = fw_csr_string(dg00x->unit->directory, CSR_MODEL, name,
			    sizeof(name));
	if (err < 0)
		return err;

	model = skip_spaces(name);

	strcpy(dg00x->card->driver, "Digi00x");
	strcpy(dg00x->card->shortname, model);
	strcpy(dg00x->card->mixername, model);
	snprintf(dg00x->card->longname, sizeof(dg00x->card->longname),
		 "Digidesign %s, GUID %08x%08x at %s, S%d", model,
		 fw_dev->config_rom[3], fw_dev->config_rom[4],
		 dev_name(&dg00x->unit->device), 100 << fw_dev->max_speed);

	return 0;
}

static void dg00x_free(struct snd_dg00x *dg00x)
{
	snd_dg00x_stream_destroy_duplex(dg00x);
	snd_dg00x_transaction_unregister(dg00x);

	fw_unit_put(dg00x->unit);

	mutex_destroy(&dg00x->mutex);
}

static void dg00x_card_free(struct snd_card *card)
{
	dg00x_free(card->private_data);
}

static void do_registration(struct work_struct *work)
{
	struct snd_dg00x *dg00x =
			container_of(work, struct snd_dg00x, dwork.work);
	int err;

	if (dg00x->registered)
		return;

	err = snd_card_new(&dg00x->unit->device, -1, NULL, THIS_MODULE, 0,
			   &dg00x->card);
	if (err < 0)
		return;

	err = name_card(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_stream_init_duplex(dg00x);
	if (err < 0)
		goto error;

	snd_dg00x_proc_init(dg00x);

	err = snd_dg00x_create_pcm_devices(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_create_midi_devices(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_create_hwdep_device(dg00x);
	if (err < 0)
		goto error;

	err = snd_dg00x_transaction_register(dg00x);
	if (err < 0)
		goto error;

	err = snd_card_register(dg00x->card);
	if (err < 0)
		goto error;

	dg00x->card->private_free = dg00x_card_free;
	dg00x->card->private_data = dg00x;
	dg00x->registered = true;

	return;
error:
	snd_dg00x_transaction_unregister(dg00x);
	snd_dg00x_stream_destroy_duplex(dg00x);
	snd_card_free(dg00x->card);
	dev_info(&dg00x->unit->device,
		 "Sound card registration failed: %d\n", err);
}

static int snd_dg00x_probe(struct fw_unit *unit,
			   const struct ieee1394_device_id *entry)
{
	struct snd_dg00x *dg00x;

	/* Allocate this independent of sound card instance. */
	dg00x = kzalloc(sizeof(struct snd_dg00x), GFP_KERNEL);
	if (dg00x == NULL)
		return -ENOMEM;

	dg00x->unit = fw_unit_get(unit);
	dev_set_drvdata(&unit->device, dg00x);

	mutex_init(&dg00x->mutex);
	spin_lock_init(&dg00x->lock);
	init_waitqueue_head(&dg00x->hwdep_wait);

	dg00x->is_console = entry->model_id == MODEL_CONSOLE;

	/* Allocate and register this sound card later. */
	INIT_DEFERRABLE_WORK(&dg00x->dwork, do_registration);
	snd_fw_schedule_registration(unit, &dg00x->dwork);

	return 0;
}

static void snd_dg00x_update(struct fw_unit *unit)
{
	struct snd_dg00x *dg00x = dev_get_drvdata(&unit->device);

	/* Postpone a workqueue for deferred registration. */
	if (!dg00x->registered)
		snd_fw_schedule_registration(unit, &dg00x->dwork);

	snd_dg00x_transaction_reregister(dg00x);

	/*
	 * After registration, userspace can start packet streaming, then this
	 * code block works fine.
	 */
	if (dg00x->registered) {
		mutex_lock(&dg00x->mutex);
		snd_dg00x_stream_update_duplex(dg00x);
		mutex_unlock(&dg00x->mutex);
	}
}

static void snd_dg00x_remove(struct fw_unit *unit)
{
	struct snd_dg00x *dg00x = 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(&dg00x->dwork);

	if (dg00x->registered) {
		/* No need to wait for releasing card object in this context. */
		snd_card_free_when_closed(dg00x->card);
	} else {
		/* Don't forget this case. */
		dg00x_free(dg00x);
	}
}

static const struct ieee1394_device_id snd_dg00x_id_table[] = {
	/* Both of 002/003 use the same ID. */
	{
		.match_flags = IEEE1394_MATCH_VENDOR_ID |
			       IEEE1394_MATCH_MODEL_ID,
		.vendor_id = VENDOR_DIGIDESIGN,
		.model_id = MODEL_CONSOLE,
	},
	{
		.match_flags = IEEE1394_MATCH_VENDOR_ID |
			       IEEE1394_MATCH_MODEL_ID,
		.vendor_id = VENDOR_DIGIDESIGN,
		.model_id = MODEL_RACK,
	},
	{}
};
MODULE_DEVICE_TABLE(ieee1394, snd_dg00x_id_table);

static struct fw_driver dg00x_driver = {
	.driver = {
		.owner = THIS_MODULE,
		.name = "snd-firewire-digi00x",
		.bus = &fw_bus_type,
	},
	.probe    = snd_dg00x_probe,
	.update   = snd_dg00x_update,
	.remove   = snd_dg00x_remove,
	.id_table = snd_dg00x_id_table,
};

static int __init snd_dg00x_init(void)
{
	return driver_register(&dg00x_driver.driver);
}

static void __exit snd_dg00x_exit(void)
{
	driver_unregister(&dg00x_driver.driver);
}

module_init(snd_dg00x_init);
module_exit(snd_dg00x_exit);