Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jaroslav Kysela |
390 |
80.91% |
8 |
27.59% |
| Takashi Iwai |
46 |
9.54% |
7 |
24.14% |
| Linus Torvalds (pre-git) |
32 |
6.64% |
9 |
31.03% |
| Linus Torvalds |
6 |
1.24% |
1 |
3.45% |
| Paul Gortmaker |
3 |
0.62% |
1 |
3.45% |
| Thomas Gleixner |
2 |
0.41% |
1 |
3.45% |
| Al Viro |
2 |
0.41% |
1 |
3.45% |
| Joe Perches |
1 |
0.21% |
1 |
3.45% |
| Total |
482 |
|
29 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Functions for the OPL4 proc file
* Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
*/
#include "opl4_local.h"
#include <linux/vmalloc.h>
#include <linux/export.h>
#include <sound/info.h>
static int snd_opl4_mem_proc_open(struct snd_info_entry *entry,
unsigned short mode, void **file_private_data)
{
struct snd_opl4 *opl4 = entry->private_data;
guard(mutex)(&opl4->access_mutex);
if (opl4->memory_access)
return -EBUSY;
opl4->memory_access++;
return 0;
}
static int snd_opl4_mem_proc_release(struct snd_info_entry *entry,
unsigned short mode, void *file_private_data)
{
struct snd_opl4 *opl4 = entry->private_data;
guard(mutex)(&opl4->access_mutex);
opl4->memory_access--;
return 0;
}
static ssize_t snd_opl4_mem_proc_read(struct snd_info_entry *entry,
void *file_private_data,
struct file *file, char __user *_buf,
size_t count, loff_t pos)
{
struct snd_opl4 *opl4 = entry->private_data;
char* buf;
buf = vmalloc(count);
if (!buf)
return -ENOMEM;
snd_opl4_read_memory(opl4, buf, pos, count);
if (copy_to_user(_buf, buf, count)) {
vfree(buf);
return -EFAULT;
}
vfree(buf);
return count;
}
static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry,
void *file_private_data,
struct file *file,
const char __user *_buf,
size_t count, loff_t pos)
{
struct snd_opl4 *opl4 = entry->private_data;
char *buf;
buf = vmalloc(count);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, _buf, count)) {
vfree(buf);
return -EFAULT;
}
snd_opl4_write_memory(opl4, buf, pos, count);
vfree(buf);
return count;
}
static const struct snd_info_entry_ops snd_opl4_mem_proc_ops = {
.open = snd_opl4_mem_proc_open,
.release = snd_opl4_mem_proc_release,
.read = snd_opl4_mem_proc_read,
.write = snd_opl4_mem_proc_write,
};
int snd_opl4_create_proc(struct snd_opl4 *opl4)
{
struct snd_info_entry *entry;
entry = snd_info_create_card_entry(opl4->card, "opl4-mem", opl4->card->proc_root);
if (entry) {
if (opl4->hardware < OPL3_HW_OPL4_ML) {
/* OPL4 can access 4 MB external ROM/SRAM */
entry->mode |= 0200;
entry->size = 4 * 1024 * 1024;
} else {
/* OPL4-ML has 1 MB internal ROM */
entry->size = 1 * 1024 * 1024;
}
entry->content = SNDRV_INFO_CONTENT_DATA;
entry->c.ops = &snd_opl4_mem_proc_ops;
entry->module = THIS_MODULE;
entry->private_data = opl4;
}
opl4->proc_entry = entry;
return 0;
}
void snd_opl4_free_proc(struct snd_opl4 *opl4)
{
snd_info_free_entry(opl4->proc_entry);
}