1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4*4882a593Smuzhiyun * GUS's memory access via proc filesystem
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/slab.h>
8*4882a593Smuzhiyun #include <sound/core.h>
9*4882a593Smuzhiyun #include <sound/gus.h>
10*4882a593Smuzhiyun #include <sound/info.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct gus_proc_private {
13*4882a593Smuzhiyun int rom; /* data are in ROM */
14*4882a593Smuzhiyun unsigned int address;
15*4882a593Smuzhiyun unsigned int size;
16*4882a593Smuzhiyun struct snd_gus_card * gus;
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun
snd_gf1_mem_proc_dump(struct snd_info_entry * entry,void * file_private_data,struct file * file,char __user * buf,size_t count,loff_t pos)19*4882a593Smuzhiyun static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry,
20*4882a593Smuzhiyun void *file_private_data,
21*4882a593Smuzhiyun struct file *file, char __user *buf,
22*4882a593Smuzhiyun size_t count, loff_t pos)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun struct gus_proc_private *priv = entry->private_data;
25*4882a593Smuzhiyun struct snd_gus_card *gus = priv->gus;
26*4882a593Smuzhiyun int err;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun err = snd_gus_dram_read(gus, buf, pos, count, priv->rom);
29*4882a593Smuzhiyun if (err < 0)
30*4882a593Smuzhiyun return err;
31*4882a593Smuzhiyun return count;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
snd_gf1_mem_proc_free(struct snd_info_entry * entry)34*4882a593Smuzhiyun static void snd_gf1_mem_proc_free(struct snd_info_entry *entry)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun struct gus_proc_private *priv = entry->private_data;
37*4882a593Smuzhiyun kfree(priv);
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun static const struct snd_info_entry_ops snd_gf1_mem_proc_ops = {
41*4882a593Smuzhiyun .read = snd_gf1_mem_proc_dump,
42*4882a593Smuzhiyun };
43*4882a593Smuzhiyun
snd_gf1_mem_proc_init(struct snd_gus_card * gus)44*4882a593Smuzhiyun int snd_gf1_mem_proc_init(struct snd_gus_card * gus)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun int idx;
47*4882a593Smuzhiyun char name[16];
48*4882a593Smuzhiyun struct gus_proc_private *priv;
49*4882a593Smuzhiyun struct snd_info_entry *entry;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun for (idx = 0; idx < 4; idx++) {
52*4882a593Smuzhiyun if (gus->gf1.mem_alloc.banks_8[idx].size > 0) {
53*4882a593Smuzhiyun priv = kzalloc(sizeof(*priv), GFP_KERNEL);
54*4882a593Smuzhiyun if (priv == NULL)
55*4882a593Smuzhiyun return -ENOMEM;
56*4882a593Smuzhiyun priv->gus = gus;
57*4882a593Smuzhiyun sprintf(name, "gus-ram-%i", idx);
58*4882a593Smuzhiyun if (! snd_card_proc_new(gus->card, name, &entry)) {
59*4882a593Smuzhiyun entry->content = SNDRV_INFO_CONTENT_DATA;
60*4882a593Smuzhiyun entry->private_data = priv;
61*4882a593Smuzhiyun entry->private_free = snd_gf1_mem_proc_free;
62*4882a593Smuzhiyun entry->c.ops = &snd_gf1_mem_proc_ops;
63*4882a593Smuzhiyun priv->address = gus->gf1.mem_alloc.banks_8[idx].address;
64*4882a593Smuzhiyun priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun for (idx = 0; idx < 4; idx++) {
69*4882a593Smuzhiyun if (gus->gf1.rom_present & (1 << idx)) {
70*4882a593Smuzhiyun priv = kzalloc(sizeof(*priv), GFP_KERNEL);
71*4882a593Smuzhiyun if (priv == NULL)
72*4882a593Smuzhiyun return -ENOMEM;
73*4882a593Smuzhiyun priv->rom = 1;
74*4882a593Smuzhiyun priv->gus = gus;
75*4882a593Smuzhiyun sprintf(name, "gus-rom-%i", idx);
76*4882a593Smuzhiyun if (! snd_card_proc_new(gus->card, name, &entry)) {
77*4882a593Smuzhiyun entry->content = SNDRV_INFO_CONTENT_DATA;
78*4882a593Smuzhiyun entry->private_data = priv;
79*4882a593Smuzhiyun entry->private_free = snd_gf1_mem_proc_free;
80*4882a593Smuzhiyun entry->c.ops = &snd_gf1_mem_proc_ops;
81*4882a593Smuzhiyun priv->address = idx * 4096 * 1024;
82*4882a593Smuzhiyun priv->size = entry->size = gus->gf1.rom_memory;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun return 0;
87*4882a593Smuzhiyun }
88