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1/*
2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3 * DRAM access routines
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#include <linux/time.h>
23#include <sound/core.h>
24#include <sound/gus.h>
25#include <sound/info.h>
26
27
28static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer,
29 unsigned int address, unsigned int size)
30{
31 unsigned long flags;
32 unsigned int size1, size2;
33 char buffer[256], *pbuffer;
34
35 while (size > 0) {
36 size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
37 if (copy_from_user(buffer, _buffer, size1))
38 return -EFAULT;
39 if (gus->interwave) {
40 spin_lock_irqsave(&gus->reg_lock, flags);
41 snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
42 snd_gf1_dram_addr(gus, address);
43 outsb(GUSP(gus, DRAM), buffer, size1);
44 spin_unlock_irqrestore(&gus->reg_lock, flags);
45 address += size1;
46 } else {
47 pbuffer = buffer;
48 size2 = size1;
49 while (size2--)
50 snd_gf1_poke(gus, address++, *pbuffer++);
51 }
52 size -= size1;
53 _buffer += size1;
54 }
55 return 0;
56}
57
58
59int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer,
60 unsigned int address, unsigned int size)
61{
62 return snd_gus_dram_poke(gus, buffer, address, size);
63}
64
65static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer,
66 unsigned int address, unsigned int size,
67 int rom)
68{
69 unsigned long flags;
70 unsigned int size1, size2;
71 char buffer[256], *pbuffer;
72
73 while (size > 0) {
74 size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
75 if (gus->interwave) {
76 spin_lock_irqsave(&gus->reg_lock, flags);
77 snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01);
78 snd_gf1_dram_addr(gus, address);
79 insb(GUSP(gus, DRAM), buffer, size1);
80 snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
81 spin_unlock_irqrestore(&gus->reg_lock, flags);
82 address += size1;
83 } else {
84 pbuffer = buffer;
85 size2 = size1;
86 while (size2--)
87 *pbuffer++ = snd_gf1_peek(gus, address++);
88 }
89 if (copy_to_user(_buffer, buffer, size1))
90 return -EFAULT;
91 size -= size1;
92 _buffer += size1;
93 }
94 return 0;
95}
96
97int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer,
98 unsigned int address, unsigned int size,
99 int rom)
100{
101 return snd_gus_dram_peek(gus, buffer, address, size, rom);
102}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 * DRAM access routines
5 */
6
7#include <linux/time.h>
8#include <sound/core.h>
9#include <sound/gus.h>
10#include <sound/info.h>
11
12
13static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer,
14 unsigned int address, unsigned int size)
15{
16 unsigned long flags;
17 unsigned int size1, size2;
18 char buffer[256], *pbuffer;
19
20 while (size > 0) {
21 size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
22 if (copy_from_user(buffer, _buffer, size1))
23 return -EFAULT;
24 if (gus->interwave) {
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);
30 address += size1;
31 } else {
32 pbuffer = buffer;
33 size2 = size1;
34 while (size2--)
35 snd_gf1_poke(gus, address++, *pbuffer++);
36 }
37 size -= size1;
38 _buffer += size1;
39 }
40 return 0;
41}
42
43
44int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer,
45 unsigned int address, unsigned int size)
46{
47 return snd_gus_dram_poke(gus, buffer, address, size);
48}
49
50static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer,
51 unsigned int address, unsigned int size,
52 int rom)
53{
54 unsigned long flags;
55 unsigned int size1, size2;
56 char buffer[256], *pbuffer;
57
58 while (size > 0) {
59 size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
60 if (gus->interwave) {
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);
67 address += size1;
68 } else {
69 pbuffer = buffer;
70 size2 = size1;
71 while (size2--)
72 *pbuffer++ = snd_gf1_peek(gus, address++);
73 }
74 if (copy_to_user(_buffer, buffer, size1))
75 return -EFAULT;
76 size -= size1;
77 _buffer += size1;
78 }
79 return 0;
80}
81
82int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer,
83 unsigned int address, unsigned int size,
84 int rom)
85{
86 return snd_gus_dram_peek(gus, buffer, address, size, rom);
87}