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, ptr: buf, addr: pos, size: count, rom: 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(objp: 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(size: sizeof(*priv), GFP_KERNEL); |
54 | if (priv == NULL) |
55 | return -ENOMEM; |
56 | priv->gus = gus; |
57 | sprintf(buf: name, fmt: "gus-ram-%i" , idx); |
58 | if (! snd_card_proc_new(card: gus->card, name, entryp: &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(size: sizeof(*priv), GFP_KERNEL); |
71 | if (priv == NULL) |
72 | return -ENOMEM; |
73 | priv->rom = 1; |
74 | priv->gus = gus; |
75 | sprintf(buf: name, fmt: "gus-rom-%i" , idx); |
76 | if (! snd_card_proc_new(card: gus->card, name, entryp: &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 | } |
88 | |