1 files changed, 103 insertions, 0 deletions

diff --git a/sound/isa/gus/gus_dram.c b/sound/isa/gus/gus_dram.c
new file mode 100644
index 000000000000..22120b868b5c
--- /dev/null
+++ b/sound/isa/gus/gus_dram.c
@@ -0,0 +1,103 @@
+/*
+ *  Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/gus.h>
+#include <sound/info.h>
+
+
+static int snd_gus_dram_poke(snd_gus_card_t *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(snd_gus_card_t *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(snd_gus_card_t *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(snd_gus_card_t *gus, char __user *buffer,
+                      unsigned int address, unsigned int size,
+                      int rom)
+{
+        return snd_gus_dram_peek(gus, buffer, address, size, rom);
+}