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1da177e4 LT |
1 | /* |
2 | * Functions for the OPL4 proc file | |
3 | * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
20 | #include "opl4_local.h" | |
21 | #include <linux/vmalloc.h> | |
d81a6d71 | 22 | #include <linux/export.h> |
1da177e4 LT |
23 | #include <sound/info.h> |
24 | ||
25 | #ifdef CONFIG_PROC_FS | |
26 | ||
a42dd420 | 27 | static int snd_opl4_mem_proc_open(struct snd_info_entry *entry, |
1da177e4 LT |
28 | unsigned short mode, void **file_private_data) |
29 | { | |
a42dd420 | 30 | struct snd_opl4 *opl4 = entry->private_data; |
1da177e4 | 31 | |
ef9f0a42 | 32 | mutex_lock(&opl4->access_mutex); |
1da177e4 | 33 | if (opl4->memory_access) { |
ef9f0a42 | 34 | mutex_unlock(&opl4->access_mutex); |
1da177e4 LT |
35 | return -EBUSY; |
36 | } | |
37 | opl4->memory_access++; | |
ef9f0a42 | 38 | mutex_unlock(&opl4->access_mutex); |
1da177e4 LT |
39 | return 0; |
40 | } | |
41 | ||
a42dd420 | 42 | static int snd_opl4_mem_proc_release(struct snd_info_entry *entry, |
1da177e4 LT |
43 | unsigned short mode, void *file_private_data) |
44 | { | |
a42dd420 | 45 | struct snd_opl4 *opl4 = entry->private_data; |
1da177e4 | 46 | |
ef9f0a42 | 47 | mutex_lock(&opl4->access_mutex); |
1da177e4 | 48 | opl4->memory_access--; |
ef9f0a42 | 49 | mutex_unlock(&opl4->access_mutex); |
1da177e4 LT |
50 | return 0; |
51 | } | |
52 | ||
24e4a121 TI |
53 | static ssize_t snd_opl4_mem_proc_read(struct snd_info_entry *entry, |
54 | void *file_private_data, | |
55 | struct file *file, char __user *_buf, | |
56 | size_t count, loff_t pos) | |
1da177e4 | 57 | { |
a42dd420 | 58 | struct snd_opl4 *opl4 = entry->private_data; |
1da177e4 LT |
59 | char* buf; |
60 | ||
d97e1b78 TI |
61 | buf = vmalloc(count); |
62 | if (!buf) | |
63 | return -ENOMEM; | |
64 | snd_opl4_read_memory(opl4, buf, pos, count); | |
65 | if (copy_to_user(_buf, buf, count)) { | |
1da177e4 | 66 | vfree(buf); |
d97e1b78 | 67 | return -EFAULT; |
1da177e4 | 68 | } |
d97e1b78 TI |
69 | vfree(buf); |
70 | return count; | |
1da177e4 LT |
71 | } |
72 | ||
24e4a121 TI |
73 | static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry, |
74 | void *file_private_data, | |
75 | struct file *file, | |
76 | const char __user *_buf, | |
670ff6ab | 77 | size_t count, loff_t pos) |
1da177e4 | 78 | { |
a42dd420 | 79 | struct snd_opl4 *opl4 = entry->private_data; |
1da177e4 LT |
80 | char *buf; |
81 | ||
d97e1b78 TI |
82 | buf = vmalloc(count); |
83 | if (!buf) | |
84 | return -ENOMEM; | |
85 | if (copy_from_user(buf, _buf, count)) { | |
1da177e4 | 86 | vfree(buf); |
d97e1b78 | 87 | return -EFAULT; |
1da177e4 | 88 | } |
d97e1b78 TI |
89 | snd_opl4_write_memory(opl4, buf, pos, count); |
90 | vfree(buf); | |
91 | return count; | |
1da177e4 LT |
92 | } |
93 | ||
1da177e4 LT |
94 | static struct snd_info_entry_ops snd_opl4_mem_proc_ops = { |
95 | .open = snd_opl4_mem_proc_open, | |
96 | .release = snd_opl4_mem_proc_release, | |
97 | .read = snd_opl4_mem_proc_read, | |
98 | .write = snd_opl4_mem_proc_write, | |
1da177e4 LT |
99 | }; |
100 | ||
a42dd420 | 101 | int snd_opl4_create_proc(struct snd_opl4 *opl4) |
1da177e4 | 102 | { |
a42dd420 | 103 | struct snd_info_entry *entry; |
1da177e4 LT |
104 | |
105 | entry = snd_info_create_card_entry(opl4->card, "opl4-mem", opl4->card->proc_root); | |
106 | if (entry) { | |
107 | if (opl4->hardware < OPL3_HW_OPL4_ML) { | |
108 | /* OPL4 can access 4 MB external ROM/SRAM */ | |
109 | entry->mode |= S_IWUSR; | |
110 | entry->size = 4 * 1024 * 1024; | |
111 | } else { | |
112 | /* OPL4-ML has 1 MB internal ROM */ | |
113 | entry->size = 1 * 1024 * 1024; | |
114 | } | |
115 | entry->content = SNDRV_INFO_CONTENT_DATA; | |
116 | entry->c.ops = &snd_opl4_mem_proc_ops; | |
117 | entry->module = THIS_MODULE; | |
118 | entry->private_data = opl4; | |
119 | if (snd_info_register(entry) < 0) { | |
120 | snd_info_free_entry(entry); | |
121 | entry = NULL; | |
122 | } | |
123 | } | |
124 | opl4->proc_entry = entry; | |
125 | return 0; | |
126 | } | |
127 | ||
a42dd420 | 128 | void snd_opl4_free_proc(struct snd_opl4 *opl4) |
1da177e4 | 129 | { |
746d4a02 | 130 | snd_info_free_entry(opl4->proc_entry); |
1da177e4 LT |
131 | } |
132 | ||
133 | #endif /* CONFIG_PROC_FS */ |