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
|
/*
* linux/kernel/chr_drv/sound/patmgr.c
*
* The patch maneger interface for the /dev/sequencer
*
* Copyright by Hannu Savolainen 1993
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer. 2.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#define PATMGR_C
#include "sound_config.h"
#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_SEQUENCER)
DEFINE_WAIT_QUEUES (server_procs[MAX_SYNTH_DEV],
server_wait_flag[MAX_SYNTH_DEV]);
static struct patmgr_info *mbox[MAX_SYNTH_DEV] =
{NULL};
static volatile int msg_direction[MAX_SYNTH_DEV] =
{0};
static int pmgr_opened[MAX_SYNTH_DEV] =
{0};
#define A_TO_S 1
#define S_TO_A 2
DEFINE_WAIT_QUEUE (appl_proc, appl_wait_flag);
int
pmgr_open (int dev)
{
if (dev < 0 || dev >= num_synths)
return RET_ERROR (ENXIO);
if (pmgr_opened[dev])
return RET_ERROR (EBUSY);
pmgr_opened[dev] = 1;
return 0;
}
void
pmgr_release (int dev)
{
if (mbox[dev]) /* Killed in action. Inform the client */
{
mbox[dev]->key = PM_ERROR;
mbox[dev]->parm1 = RET_ERROR (EIO);
if (appl_wait_flag)
WAKE_UP (appl_proc);
}
pmgr_opened[dev] = 0;
}
int
pmgr_read (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
unsigned long flags;
int ok = 0;
if (count != sizeof (struct patmgr_info))
{
printk ("PATMGR%d: Invalid read count\n", dev);
return RET_ERROR (EIO);
}
while (!ok && !PROCESS_ABORTING)
{
DISABLE_INTR (flags);
while (!(mbox[dev] && msg_direction[dev] == A_TO_S) && !PROCESS_ABORTING)
{
INTERRUPTIBLE_SLEEP_ON (server_procs[dev], server_wait_flag[dev]);
}
if (mbox[dev] && msg_direction[dev] == A_TO_S)
{
COPY_TO_USER (buf, 0, (char *) mbox[dev], count);
msg_direction[dev] = 0;
ok = 1;
}
RESTORE_INTR (flags);
}
if (!ok)
return RET_ERROR (EINTR);
return count;
}
int
pmgr_write (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
{
unsigned long flags;
if (count < 4)
{
printk ("PATMGR%d: Write count < 4\n", dev);
return RET_ERROR (EIO);
}
COPY_FROM_USER (mbox[dev], buf, 0, 4);
if (*(unsigned char *) mbox[dev] == SEQ_FULLSIZE)
{
int tmp_dev;
tmp_dev = ((unsigned short *) mbox[dev])[2];
if (tmp_dev != dev)
return RET_ERROR (ENXIO);
return synth_devs[dev]->load_patch (dev, *(unsigned short *) mbox[dev],
buf, 4, count, 1);
}
if (count != sizeof (struct patmgr_info))
{
printk ("PATMGR%d: Invalid write count\n", dev);
return RET_ERROR (EIO);
}
/*
* If everything went OK, there should be a preallocated buffer in the
* mailbox and a client waiting.
*/
DISABLE_INTR (flags);
if (mbox[dev] && !msg_direction[dev])
{
COPY_FROM_USER (&((char *) mbox[dev])[4], buf, 4, count - 4);
msg_direction[dev] = S_TO_A;
if (appl_wait_flag)
{
WAKE_UP (appl_proc);
}
}
RESTORE_INTR (flags);
return count;
}
int
pmgr_access (int dev, struct patmgr_info *rec)
{
unsigned long flags;
int err = 0;
DISABLE_INTR (flags);
if (mbox[dev])
printk (" PATMGR: Server %d mbox full. Why?\n", dev);
else
{
rec->key = PM_K_COMMAND;
mbox[dev] = rec;
msg_direction[dev] = A_TO_S;
if (server_wait_flag[dev])
{
WAKE_UP (server_procs[dev]);
}
INTERRUPTIBLE_SLEEP_ON (appl_proc, appl_wait_flag);
if (msg_direction[dev] != S_TO_A)
{
rec->key = PM_ERROR;
rec->parm1 = RET_ERROR (EIO);
}
else if (rec->key == PM_ERROR)
{
err = rec->parm1;
if (err > 0)
err = -err;
}
mbox[dev] = NULL;
msg_direction[dev] = 0;
}
RESTORE_INTR (flags);
return err;
}
int
pmgr_inform (int dev, int event, unsigned long p1, unsigned long p2,
unsigned long p3, unsigned long p4)
{
unsigned long flags;
int err = 0;
if (!pmgr_opened[dev])
return 0;
DISABLE_INTR (flags);
if (mbox[dev])
printk (" PATMGR: Server %d mbox full. Why?\n", dev);
else
{
mbox[dev] =
(struct patmgr_info *) KERNEL_MALLOC (sizeof (struct patmgr_info));
mbox[dev]->key = PM_K_EVENT;
mbox[dev]->command = event;
mbox[dev]->parm1 = p1;
mbox[dev]->parm2 = p2;
mbox[dev]->parm3 = p3;
msg_direction[dev] = A_TO_S;
if (server_wait_flag[dev])
{
WAKE_UP (server_procs[dev]);
}
INTERRUPTIBLE_SLEEP_ON (appl_proc, appl_wait_flag);
if (mbox[dev])
KERNEL_FREE (mbox[dev]);
mbox[dev] = NULL;
msg_direction[dev] = 0;
}
RESTORE_INTR (flags);
return err;
}
#endif
|
