2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3 * GUS's memory access via proc filesystem
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.
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.
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
22 #include <linux/slab.h>
23 #include <sound/core.h>
24 #include <sound/gus.h>
25 #include <sound/info.h>
27 struct gus_proc_private
{
28 int rom
; /* data are in ROM */
31 struct snd_gus_card
* gus
;
34 static ssize_t
snd_gf1_mem_proc_dump(struct snd_info_entry
*entry
,
35 void *file_private_data
,
36 struct file
*file
, char __user
*buf
,
37 size_t count
, loff_t pos
)
39 struct gus_proc_private
*priv
= entry
->private_data
;
40 struct snd_gus_card
*gus
= priv
->gus
;
43 err
= snd_gus_dram_read(gus
, buf
, pos
, count
, priv
->rom
);
49 static loff_t
snd_gf1_mem_proc_llseek(struct snd_info_entry
*entry
,
50 void *private_file_data
,
52 loff_t offset
, int orig
)
54 struct gus_proc_private
*priv
= entry
->private_data
;
61 file
->f_pos
+= offset
;
63 case SEEK_END
: /* offset is negative */
64 file
->f_pos
= priv
->size
+ offset
;
69 if (file
->f_pos
> priv
->size
)
70 file
->f_pos
= priv
->size
;
74 static void snd_gf1_mem_proc_free(struct snd_info_entry
*entry
)
76 struct gus_proc_private
*priv
= entry
->private_data
;
80 static struct snd_info_entry_ops snd_gf1_mem_proc_ops
= {
81 .read
= snd_gf1_mem_proc_dump
,
82 .llseek
= snd_gf1_mem_proc_llseek
,
85 int snd_gf1_mem_proc_init(struct snd_gus_card
* gus
)
89 struct gus_proc_private
*priv
;
90 struct snd_info_entry
*entry
;
92 for (idx
= 0; idx
< 4; idx
++) {
93 if (gus
->gf1
.mem_alloc
.banks_8
[idx
].size
> 0) {
94 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
98 sprintf(name
, "gus-ram-%i", idx
);
99 if (! snd_card_proc_new(gus
->card
, name
, &entry
)) {
100 entry
->content
= SNDRV_INFO_CONTENT_DATA
;
101 entry
->private_data
= priv
;
102 entry
->private_free
= snd_gf1_mem_proc_free
;
103 entry
->c
.ops
= &snd_gf1_mem_proc_ops
;
104 priv
->address
= gus
->gf1
.mem_alloc
.banks_8
[idx
].address
;
105 priv
->size
= entry
->size
= gus
->gf1
.mem_alloc
.banks_8
[idx
].size
;
109 for (idx
= 0; idx
< 4; idx
++) {
110 if (gus
->gf1
.rom_present
& (1 << idx
)) {
111 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
116 sprintf(name
, "gus-rom-%i", idx
);
117 if (! snd_card_proc_new(gus
->card
, name
, &entry
)) {
118 entry
->content
= SNDRV_INFO_CONTENT_DATA
;
119 entry
->private_data
= priv
;
120 entry
->private_free
= snd_gf1_mem_proc_free
;
121 entry
->c
.ops
= &snd_gf1_mem_proc_ops
;
122 priv
->address
= idx
* 4096 * 1024;
123 priv
->size
= entry
->size
= gus
->gf1
.rom_memory
;