Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
c1017a4c | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 LT |
22 | #include <linux/time.h> |
23 | #include <sound/core.h> | |
24 | #include <sound/gus.h> | |
25 | #include <sound/info.h> | |
26 | ||
27 | ||
5e2da206 | 28 | static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer, |
1da177e4 LT |
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 | ||
5e2da206 | 59 | int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer, |
1da177e4 LT |
60 | unsigned int address, unsigned int size) |
61 | { | |
62 | return snd_gus_dram_poke(gus, buffer, address, size); | |
63 | } | |
64 | ||
5e2da206 | 65 | static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer, |
1da177e4 LT |
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 | ||
5e2da206 | 97 | int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer, |
1da177e4 LT |
98 | unsigned int address, unsigned int size, |
99 | int rom) | |
100 | { | |
101 | return snd_gus_dram_peek(gus, buffer, address, size, rom); | |
102 | } |