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30#include <linux/init.h>
31#include <linux/wait.h>
32#include <linux/err.h>
33#include <linux/platform_device.h>
34#include <linux/module.h>
35#include <sound/core.h>
36#include <sound/seq_kernel.h>
37#include <sound/seq_virmidi.h>
38#include <sound/initval.h>
39
40
41#undef midi_devs
42
43MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
44MODULE_DESCRIPTION("Dummy soundcard for virtual rawmidi devices");
45MODULE_LICENSE("GPL");
46MODULE_SUPPORTED_DEVICE("{{ALSA,Virtual rawmidi device}}");
47
48#define MAX_MIDI_DEVICES 4
49
50static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
51static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
52static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
53static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 4};
54
55module_param_array(index, int, NULL, 0444);
56MODULE_PARM_DESC(index, "Index value for virmidi soundcard.");
57module_param_array(id, charp, NULL, 0444);
58MODULE_PARM_DESC(id, "ID string for virmidi soundcard.");
59module_param_array(enable, bool, NULL, 0444);
60MODULE_PARM_DESC(enable, "Enable this soundcard.");
61module_param_array(midi_devs, int, NULL, 0444);
62MODULE_PARM_DESC(midi_devs, "MIDI devices # (1-4)");
63
64struct snd_card_virmidi {
65 struct snd_card *card;
66 struct snd_rawmidi *midi[MAX_MIDI_DEVICES];
67};
68
69static struct platform_device *devices[SNDRV_CARDS];
70
71
72static int snd_virmidi_probe(struct platform_device *devptr)
73{
74 struct snd_card *card;
75 struct snd_card_virmidi *vmidi;
76 int idx, err;
77 int dev = devptr->id;
78
79 err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
80 sizeof(struct snd_card_virmidi), &card);
81 if (err < 0)
82 return err;
83 vmidi = card->private_data;
84 vmidi->card = card;
85
86 if (midi_devs[dev] > MAX_MIDI_DEVICES) {
87 snd_printk(KERN_WARNING
88 "too much midi devices for virmidi %d: force to use %d\n",
89 dev, MAX_MIDI_DEVICES);
90 midi_devs[dev] = MAX_MIDI_DEVICES;
91 }
92 for (idx = 0; idx < midi_devs[dev]; idx++) {
93 struct snd_rawmidi *rmidi;
94 struct snd_virmidi_dev *rdev;
95
96 err = snd_virmidi_new(card, idx, &rmidi);
97 if (err < 0)
98 goto __nodev;
99 rdev = rmidi->private_data;
100 vmidi->midi[idx] = rmidi;
101 strcpy(rmidi->name, "Virtual Raw MIDI");
102 rdev->seq_mode = SNDRV_VIRMIDI_SEQ_DISPATCH;
103 }
104
105 strcpy(card->driver, "VirMIDI");
106 strcpy(card->shortname, "VirMIDI");
107 sprintf(card->longname, "Virtual MIDI Card %i", dev + 1);
108
109 err = snd_card_register(card);
110 if (!err) {
111 platform_set_drvdata(devptr, card);
112 return 0;
113 }
114__nodev:
115 snd_card_free(card);
116 return err;
117}
118
119static int snd_virmidi_remove(struct platform_device *devptr)
120{
121 snd_card_free(platform_get_drvdata(devptr));
122 return 0;
123}
124
125#define SND_VIRMIDI_DRIVER "snd_virmidi"
126
127static struct platform_driver snd_virmidi_driver = {
128 .probe = snd_virmidi_probe,
129 .remove = snd_virmidi_remove,
130 .driver = {
131 .name = SND_VIRMIDI_DRIVER,
132 },
133};
134
135static void snd_virmidi_unregister_all(void)
136{
137 int i;
138
139 for (i = 0; i < ARRAY_SIZE(devices); ++i)
140 platform_device_unregister(devices[i]);
141 platform_driver_unregister(&snd_virmidi_driver);
142}
143
144static int __init alsa_card_virmidi_init(void)
145{
146 int i, cards, err;
147
148 err = platform_driver_register(&snd_virmidi_driver);
149 if (err < 0)
150 return err;
151
152 cards = 0;
153 for (i = 0; i < SNDRV_CARDS; i++) {
154 struct platform_device *device;
155
156 if (!enable[i])
157 continue;
158 device = platform_device_register_simple(SND_VIRMIDI_DRIVER,
159 i, NULL, 0);
160 if (IS_ERR(device))
161 continue;
162 if (!platform_get_drvdata(device)) {
163 platform_device_unregister(device);
164 continue;
165 }
166 devices[i] = device;
167 cards++;
168 }
169 if (!cards) {
170#ifdef MODULE
171 printk(KERN_ERR "Card-VirMIDI soundcard not found or device busy\n");
172#endif
173 snd_virmidi_unregister_all();
174 return -ENODEV;
175 }
176 return 0;
177}
178
179static void __exit alsa_card_virmidi_exit(void)
180{
181 snd_virmidi_unregister_all();
182}
183
184module_init(alsa_card_virmidi_init)
185module_exit(alsa_card_virmidi_exit)
186
