136 lines
3.7 KiB
C
136 lines
3.7 KiB
C
/*
|
|
* Copyright (c) by Jaroslav Kysela <perex@suse.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;
|
|
}
|