103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
* DRAM access routines
|
|
*
|
|
*
|
|
* 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 <linux/time.h>
|
|
#include <sound/core.h>
|
|
#include <sound/gus.h>
|
|
#include <sound/info.h>
|
|
|
|
|
|
static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer,
|
|
unsigned int address, unsigned int size)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int size1, size2;
|
|
char buffer[256], *pbuffer;
|
|
|
|
while (size > 0) {
|
|
size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
|
|
if (copy_from_user(buffer, _buffer, size1))
|
|
return -EFAULT;
|
|
if (gus->interwave) {
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
|
snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
|
|
snd_gf1_dram_addr(gus, address);
|
|
outsb(GUSP(gus, DRAM), buffer, size1);
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
|
address += size1;
|
|
} else {
|
|
pbuffer = buffer;
|
|
size2 = size1;
|
|
while (size2--)
|
|
snd_gf1_poke(gus, address++, *pbuffer++);
|
|
}
|
|
size -= size1;
|
|
_buffer += size1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer,
|
|
unsigned int address, unsigned int size)
|
|
{
|
|
return snd_gus_dram_poke(gus, buffer, address, size);
|
|
}
|
|
|
|
static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer,
|
|
unsigned int address, unsigned int size,
|
|
int rom)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int size1, size2;
|
|
char buffer[256], *pbuffer;
|
|
|
|
while (size > 0) {
|
|
size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
|
|
if (gus->interwave) {
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
|
snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01);
|
|
snd_gf1_dram_addr(gus, address);
|
|
insb(GUSP(gus, DRAM), buffer, size1);
|
|
snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
|
address += size1;
|
|
} else {
|
|
pbuffer = buffer;
|
|
size2 = size1;
|
|
while (size2--)
|
|
*pbuffer++ = snd_gf1_peek(gus, address++);
|
|
}
|
|
if (copy_to_user(_buffer, buffer, size1))
|
|
return -EFAULT;
|
|
size -= size1;
|
|
_buffer += size1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer,
|
|
unsigned int address, unsigned int size,
|
|
int rom)
|
|
{
|
|
return snd_gus_dram_peek(gus, buffer, address, size, rom);
|
|
}
|