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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for generic MPU-401 boards (UART mode only)
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Copyright (c) 2004 by Castet Matthieu <castet.matthieu@free.fr>
*/
#include <linux/init.h>
#include <linux/pnp.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/mpu401.h>
#include <sound/initval.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("MPU-401 UART");
MODULE_LICENSE("GPL");
static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
#ifdef CONFIG_PNP
static bool pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
#endif
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */
static bool uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
#ifdef CONFIG_PNP
module_param_array(pnp, bool, NULL, 0444);
MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
#endif
module_param_hw_array(port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
module_param_hw_array(irq, int, irq, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
module_param_array(uart_enter, bool, NULL, 0444);
MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
static struct platform_device *platform_devices[SNDRV_CARDS];
static int pnp_registered;
static unsigned int snd_mpu401_devices;
static int snd_mpu401_create(struct device *devptr, int dev,
struct snd_card **rcard)
{
struct snd_card *card;
int err;
if (!uart_enter[dev])
snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");
*rcard = NULL;
err = snd_card_new(devptr, index[dev], id[dev], THIS_MODULE,
0, &card);
if (err < 0)
return err;
strcpy(card->driver, "MPU-401 UART");
strcpy(card->shortname, card->driver);
sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
if (irq[dev] >= 0) {
sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
} else {
strcat(card->longname, "polled");
}
err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0,
irq[dev], NULL);
if (err < 0) {
printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
goto _err;
}
*rcard = card;
return 0;
_err:
snd_card_free(card);
return err;
}
static int snd_mpu401_probe(struct platform_device *devptr)
{
int dev = devptr->id;
int err;
struct snd_card *card;
if (port[dev] == SNDRV_AUTO_PORT) {
snd_printk(KERN_ERR "specify port\n");
return -EINVAL;
}
if (irq[dev] == SNDRV_AUTO_IRQ) {
snd_printk(KERN_ERR "specify or disable IRQ\n");
return -EINVAL;
}
err = snd_mpu401_create(&devptr->dev, dev, &card);
if (err < 0)
return err;
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
return err;
}
platform_set_drvdata(devptr, card);
return 0;
}
static int snd_mpu401_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
return 0;
}
#define SND_MPU401_DRIVER "snd_mpu401"
static struct platform_driver snd_mpu401_driver = {
.probe = snd_mpu401_probe,
.remove = snd_mpu401_remove,
.driver = {
.name = SND_MPU401_DRIVER,
},
};
#ifdef CONFIG_PNP
#define IO_EXTENT 2
static const struct pnp_device_id snd_mpu401_pnpids[] = {
{ .id = "PNPb006" },
{ .id = "" }
};
MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
static int snd_mpu401_pnp(int dev, struct pnp_dev *device,
const struct pnp_device_id *id)
{
if (!pnp_port_valid(device, 0) ||
pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
snd_printk(KERN_ERR "no PnP port\n");
return -ENODEV;
}
if (pnp_port_len(device, 0) < IO_EXTENT) {
snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n",
(unsigned long long)pnp_port_len(device, 0),
IO_EXTENT);
return -ENODEV;
}
port[dev] = pnp_port_start(device, 0);
if (!pnp_irq_valid(device, 0) ||
pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
snd_printk(KERN_WARNING "no PnP irq, using polling\n");
irq[dev] = -1;
} else {
irq[dev] = pnp_irq(device, 0);
}
return 0;
}
static int snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
const struct pnp_device_id *id)
{
static int dev;
struct snd_card *card;
int err;
for ( ; dev < SNDRV_CARDS; ++dev) {
if (!enable[dev] || !pnp[dev])
continue;
err = snd_mpu401_pnp(dev, pnp_dev, id);
if (err < 0)
return err;
err = snd_mpu401_create(&pnp_dev->dev, dev, &card);
if (err < 0)
return err;
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
return err;
}
pnp_set_drvdata(pnp_dev, card);
snd_mpu401_devices++;
++dev;
return 0;
}
return -ENODEV;
}
static void snd_mpu401_pnp_remove(struct pnp_dev *dev)
{
struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
snd_card_disconnect(card);
snd_card_free_when_closed(card);
}
static struct pnp_driver snd_mpu401_pnp_driver = {
.name = "mpu401",
.id_table = snd_mpu401_pnpids,
.probe = snd_mpu401_pnp_probe,
.remove = snd_mpu401_pnp_remove,
};
#else
static struct pnp_driver snd_mpu401_pnp_driver;
#endif
static void snd_mpu401_unregister_all(void)
{
int i;
if (pnp_registered)
pnp_unregister_driver(&snd_mpu401_pnp_driver);
for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
platform_device_unregister(platform_devices[i]);
platform_driver_unregister(&snd_mpu401_driver);
}
static int __init alsa_card_mpu401_init(void)
{
int i, err;
err = platform_driver_register(&snd_mpu401_driver);
if (err < 0)
return err;
for (i = 0; i < SNDRV_CARDS; i++) {
struct platform_device *device;
if (! enable[i])
continue;
#ifdef CONFIG_PNP
if (pnp[i])
continue;
#endif
device = platform_device_register_simple(SND_MPU401_DRIVER,
i, NULL, 0);
if (IS_ERR(device))
continue;
if (!platform_get_drvdata(device)) {
platform_device_unregister(device);
continue;
}
platform_devices[i] = device;
snd_mpu401_devices++;
}
err = pnp_register_driver(&snd_mpu401_pnp_driver);
if (!err)
pnp_registered = 1;
if (!snd_mpu401_devices) {
#ifdef MODULE
printk(KERN_ERR "MPU-401 device not found or device busy\n");
#endif
snd_mpu401_unregister_all();
return -ENODEV;
}
return 0;
}
static void __exit alsa_card_mpu401_exit(void)
{
snd_mpu401_unregister_all();
}
module_init(alsa_card_mpu401_init)
module_exit(alsa_card_mpu401_exit)
|
