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