1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
7 #include <linux/time.h>
8 #include <sound/core.h>
10 #include <sound/info.h>
13 static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer,
14 unsigned int address, unsigned int size)
17 unsigned int size1, size2;
18 char buffer[256], *pbuffer;
21 size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
22 if (copy_from_user(buffer, _buffer, size1))
25 spin_lock_irqsave(&gus->reg_lock, flags);
26 snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
27 snd_gf1_dram_addr(gus, address);
28 outsb(GUSP(gus, DRAM), buffer, size1);
29 spin_unlock_irqrestore(&gus->reg_lock, flags);
35 snd_gf1_poke(gus, address++, *pbuffer++);
44 int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer,
45 unsigned int address, unsigned int size)
47 return snd_gus_dram_poke(gus, buffer, address, size);
50 static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer,
51 unsigned int address, unsigned int size,
55 unsigned int size1, size2;
56 char buffer[256], *pbuffer;
59 size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
61 spin_lock_irqsave(&gus->reg_lock, flags);
62 snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01);
63 snd_gf1_dram_addr(gus, address);
64 insb(GUSP(gus, DRAM), buffer, size1);
65 snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
66 spin_unlock_irqrestore(&gus->reg_lock, flags);
72 *pbuffer++ = snd_gf1_peek(gus, address++);
74 if (copy_to_user(_buffer, buffer, size1))
82 int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer,
83 unsigned int address, unsigned int size,
86 return snd_gus_dram_peek(gus, buffer, address, size, rom);