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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>4 * GUS's memory access via proc filesystem5 */6 7#include <linux/slab.h>8#include <sound/core.h>9#include <sound/gus.h>10#include <sound/info.h>11 12struct 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 19static 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 34static 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 40static const struct snd_info_entry_ops snd_gf1_mem_proc_ops = {41 .read = snd_gf1_mem_proc_dump,42};43 44int 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}88