88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* GUS's memory access via proc filesystem
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*/
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/gus.h>
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#include <sound/info.h>
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struct gus_proc_private {
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int rom; /* data are in ROM */
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unsigned int address;
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unsigned int size;
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struct snd_gus_card * gus;
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};
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static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry,
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void *file_private_data,
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struct file *file, char __user *buf,
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size_t count, loff_t pos)
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{
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struct gus_proc_private *priv = entry->private_data;
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struct snd_gus_card *gus = priv->gus;
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int err;
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err = snd_gus_dram_read(gus, buf, pos, count, priv->rom);
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if (err < 0)
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return err;
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return count;
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}
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static void snd_gf1_mem_proc_free(struct snd_info_entry *entry)
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{
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struct gus_proc_private *priv = entry->private_data;
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kfree(priv);
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}
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static const struct snd_info_entry_ops snd_gf1_mem_proc_ops = {
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.read = snd_gf1_mem_proc_dump,
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};
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int snd_gf1_mem_proc_init(struct snd_gus_card * gus)
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{
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int idx;
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char name[16];
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struct gus_proc_private *priv;
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struct snd_info_entry *entry;
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for (idx = 0; idx < 4; idx++) {
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if (gus->gf1.mem_alloc.banks_8[idx].size > 0) {
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (priv == NULL)
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return -ENOMEM;
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priv->gus = gus;
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sprintf(name, "gus-ram-%i", idx);
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if (! snd_card_proc_new(gus->card, name, &entry)) {
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entry->content = SNDRV_INFO_CONTENT_DATA;
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entry->private_data = priv;
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entry->private_free = snd_gf1_mem_proc_free;
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entry->c.ops = &snd_gf1_mem_proc_ops;
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priv->address = gus->gf1.mem_alloc.banks_8[idx].address;
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priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size;
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}
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}
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}
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for (idx = 0; idx < 4; idx++) {
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if (gus->gf1.rom_present & (1 << idx)) {
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (priv == NULL)
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return -ENOMEM;
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priv->rom = 1;
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priv->gus = gus;
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sprintf(name, "gus-rom-%i", idx);
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if (! snd_card_proc_new(gus->card, name, &entry)) {
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entry->content = SNDRV_INFO_CONTENT_DATA;
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entry->private_data = priv;
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entry->private_free = snd_gf1_mem_proc_free;
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entry->c.ops = &snd_gf1_mem_proc_ops;
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priv->address = idx * 4096 * 1024;
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priv->size = entry->size = gus->gf1.rom_memory;
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}
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}
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}
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return 0;
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}
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