Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[zen-stable.git] / sound / drivers / opl4 / opl4_proc.c
blob9b824bfc919db5baef8d1aee976218b903599c83
1 /*
2 * Functions for the OPL4 proc file
3 * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
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.
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.
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
20 #include "opl4_local.h"
21 #include <linux/vmalloc.h>
22 #include <linux/export.h>
23 #include <sound/info.h>
25 #ifdef CONFIG_PROC_FS
27 static int snd_opl4_mem_proc_open(struct snd_info_entry *entry,
28 unsigned short mode, void **file_private_data)
30 struct snd_opl4 *opl4 = entry->private_data;
32 mutex_lock(&opl4->access_mutex);
33 if (opl4->memory_access) {
34 mutex_unlock(&opl4->access_mutex);
35 return -EBUSY;
37 opl4->memory_access++;
38 mutex_unlock(&opl4->access_mutex);
39 return 0;
42 static int snd_opl4_mem_proc_release(struct snd_info_entry *entry,
43 unsigned short mode, void *file_private_data)
45 struct snd_opl4 *opl4 = entry->private_data;
47 mutex_lock(&opl4->access_mutex);
48 opl4->memory_access--;
49 mutex_unlock(&opl4->access_mutex);
50 return 0;
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)
58 struct snd_opl4 *opl4 = entry->private_data;
59 char* buf;
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)) {
66 vfree(buf);
67 return -EFAULT;
69 vfree(buf);
70 return count;
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,
77 size_t count, loff_t pos)
79 struct snd_opl4 *opl4 = entry->private_data;
80 char *buf;
82 buf = vmalloc(count);
83 if (!buf)
84 return -ENOMEM;
85 if (copy_from_user(buf, _buf, count)) {
86 vfree(buf);
87 return -EFAULT;
89 snd_opl4_write_memory(opl4, buf, pos, count);
90 vfree(buf);
91 return count;
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,
101 int snd_opl4_create_proc(struct snd_opl4 *opl4)
103 struct snd_info_entry *entry;
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;
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;
124 opl4->proc_entry = entry;
125 return 0;
128 void snd_opl4_free_proc(struct snd_opl4 *opl4)
130 snd_info_free_entry(opl4->proc_entry);
133 #endif /* CONFIG_PROC_FS */