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
|
/*
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* GUS's memory access via proc filesystem
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sound/driver.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/info.h>
struct gus_proc_private {
int rom; /* data are in ROM */
unsigned int address;
unsigned int size;
struct snd_gus_card * gus;
};
static long snd_gf1_mem_proc_dump(struct snd_info_entry *entry, void *file_private_data,
struct file *file, char __user *buf,
unsigned long count, unsigned long pos)
{
long size;
struct gus_proc_private *priv = entry->private_data;
struct snd_gus_card *gus = priv->gus;
int err;
size = count;
if (pos + size > priv->size)
size = (long)priv->size - pos;
if (size > 0) {
if ((err = snd_gus_dram_read(gus, buf, pos, size, priv->rom)) < 0)
return err;
return size;
}
return 0;
}
static long long snd_gf1_mem_proc_llseek(struct snd_info_entry *entry,
void *private_file_data,
struct file *file,
long long offset,
int orig)
{
struct gus_proc_private *priv = entry->private_data;
switch (orig) {
case SEEK_SET:
file->f_pos = offset;
break;
case SEEK_CUR:
file->f_pos += offset;
break;
case SEEK_END: /* offset is negative */
file->f_pos = priv->size + offset;
break;
default:
return -EINVAL;
}
if (file->f_pos > priv->size)
file->f_pos = priv->size;
return file->f_pos;
}
static void snd_gf1_mem_proc_free(struct snd_info_entry *entry)
{
struct gus_proc_private *priv = entry->private_data;
kfree(priv);
}
static struct snd_info_entry_ops snd_gf1_mem_proc_ops = {
.read = snd_gf1_mem_proc_dump,
.llseek = snd_gf1_mem_proc_llseek,
};
int snd_gf1_mem_proc_init(struct snd_gus_card * gus)
{
int idx;
char name[16];
struct gus_proc_private *priv;
struct snd_info_entry *entry;
for (idx = 0; idx < 4; idx++) {
if (gus->gf1.mem_alloc.banks_8[idx].size > 0) {
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
priv->gus = gus;
sprintf(name, "gus-ram-%i", idx);
if (! snd_card_proc_new(gus->card, name, &entry)) {
entry->content = SNDRV_INFO_CONTENT_DATA;
entry->private_data = priv;
entry->private_free = snd_gf1_mem_proc_free;
entry->c.ops = &snd_gf1_mem_proc_ops;
priv->address = gus->gf1.mem_alloc.banks_8[idx].address;
priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size;
}
}
}
for (idx = 0; idx < 4; idx++) {
if (gus->gf1.rom_present & (1 << idx)) {
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
priv->rom = 1;
priv->gus = gus;
sprintf(name, "gus-rom-%i", idx);
if (! snd_card_proc_new(gus->card, name, &entry)) {
entry->content = SNDRV_INFO_CONTENT_DATA;
entry->private_data = priv;
entry->private_free = snd_gf1_mem_proc_free;
entry->c.ops = &snd_gf1_mem_proc_ops;
priv->address = idx * 4096 * 1024;
priv->size = entry->size = gus->gf1.rom_memory;
}
}
}
return 0;
}
|
