ALSA: info: Make snd_info_entry_ops as const
[muen/linux.git] / sound / isa / gus / gus_mem_proc.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4  *  GUS's memory access via proc filesystem
5  */
6
7 #include <linux/slab.h>
8 #include <sound/core.h>
9 #include <sound/gus.h>
10 #include <sound/info.h>
11
12 struct gus_proc_private {
13         int rom;                /* data are in ROM */
14         unsigned int address;
15         unsigned int size;
16         struct snd_gus_card * gus;
17 };
18
19 static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry,
20                                      void *file_private_data,
21                                      struct file *file, char __user *buf,
22                                      size_t count, loff_t pos)
23 {
24         struct gus_proc_private *priv = entry->private_data;
25         struct snd_gus_card *gus = priv->gus;
26         int err;
27
28         err = snd_gus_dram_read(gus, buf, pos, count, priv->rom);
29         if (err < 0)
30                 return err;
31         return count;
32 }                       
33
34 static void snd_gf1_mem_proc_free(struct snd_info_entry *entry)
35 {
36         struct gus_proc_private *priv = entry->private_data;
37         kfree(priv);
38 }
39
40 static const struct snd_info_entry_ops snd_gf1_mem_proc_ops = {
41         .read = snd_gf1_mem_proc_dump,
42 };
43
44 int snd_gf1_mem_proc_init(struct snd_gus_card * gus)
45 {
46         int idx;
47         char name[16];
48         struct gus_proc_private *priv;
49         struct snd_info_entry *entry;
50
51         for (idx = 0; idx < 4; idx++) {
52                 if (gus->gf1.mem_alloc.banks_8[idx].size > 0) {
53                         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
54                         if (priv == NULL)
55                                 return -ENOMEM;
56                         priv->gus = gus;
57                         sprintf(name, "gus-ram-%i", idx);
58                         if (! snd_card_proc_new(gus->card, name, &entry)) {
59                                 entry->content = SNDRV_INFO_CONTENT_DATA;
60                                 entry->private_data = priv;
61                                 entry->private_free = snd_gf1_mem_proc_free;
62                                 entry->c.ops = &snd_gf1_mem_proc_ops;
63                                 priv->address = gus->gf1.mem_alloc.banks_8[idx].address;
64                                 priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size;
65                         }
66                 }
67         }
68         for (idx = 0; idx < 4; idx++) {
69                 if (gus->gf1.rom_present & (1 << idx)) {
70                         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
71                         if (priv == NULL)
72                                 return -ENOMEM;
73                         priv->rom = 1;
74                         priv->gus = gus;
75                         sprintf(name, "gus-rom-%i", idx);
76                         if (! snd_card_proc_new(gus->card, name, &entry)) {
77                                 entry->content = SNDRV_INFO_CONTENT_DATA;
78                                 entry->private_data = priv;
79                                 entry->private_free = snd_gf1_mem_proc_free;
80                                 entry->c.ops = &snd_gf1_mem_proc_ops;
81                                 priv->address = idx * 4096 * 1024;
82                                 priv->size = entry->size = gus->gf1.rom_memory;
83                         }
84                 }
85         }
86         return 0;
87 }