Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / sound / isa / gus / gus_dram.c
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
28 static 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
59 int 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
65 static 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
97 int 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 }