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