1/* 2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 3 * GUS's memory access via proc filesystem 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22#include <linux/slab.h> 23#include <sound/core.h> 24#include <sound/gus.h> 25#include <sound/info.h> 26 27struct gus_proc_private { 28 int rom; /* data are in ROM */ 29 unsigned int address; 30 unsigned int size; 31 struct snd_gus_card * gus; 32}; 33 34static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry, 35 void *file_private_data, 36 struct file *file, char __user *buf, 37 size_t count, loff_t pos) 38{ 39 struct gus_proc_private *priv = entry->private_data; 40 struct snd_gus_card *gus = priv->gus; 41 int err; 42 43 err = snd_gus_dram_read(gus, buf, pos, count, priv->rom); 44 if (err < 0) 45 return err; 46 return count; 47} 48 49static void snd_gf1_mem_proc_free(struct snd_info_entry *entry) 50{ 51 struct gus_proc_private *priv = entry->private_data; 52 kfree(priv); 53} 54 55static struct snd_info_entry_ops snd_gf1_mem_proc_ops = { 56 .read = snd_gf1_mem_proc_dump, 57}; 58 59int snd_gf1_mem_proc_init(struct snd_gus_card * gus) 60{ 61 int idx; 62 char name[16]; 63 struct gus_proc_private *priv; 64 struct snd_info_entry *entry; 65 66 for (idx = 0; idx < 4; idx++) { 67 if (gus->gf1.mem_alloc.banks_8[idx].size > 0) { 68 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 69 if (priv == NULL) 70 return -ENOMEM; 71 priv->gus = gus; 72 sprintf(name, "gus-ram-%i", idx); 73 if (! snd_card_proc_new(gus->card, name, &entry)) { 74 entry->content = SNDRV_INFO_CONTENT_DATA; 75 entry->private_data = priv; 76 entry->private_free = snd_gf1_mem_proc_free; 77 entry->c.ops = &snd_gf1_mem_proc_ops; 78 priv->address = gus->gf1.mem_alloc.banks_8[idx].address; 79 priv->size = entry->size = gus->gf1.mem_alloc.banks_8[idx].size; 80 } 81 } 82 } 83 for (idx = 0; idx < 4; idx++) { 84 if (gus->gf1.rom_present & (1 << idx)) { 85 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 86 if (priv == NULL) 87 return -ENOMEM; 88 priv->rom = 1; 89 priv->gus = gus; 90 sprintf(name, "gus-rom-%i", idx); 91 if (! snd_card_proc_new(gus->card, name, &entry)) { 92 entry->content = SNDRV_INFO_CONTENT_DATA; 93 entry->private_data = priv; 94 entry->private_free = snd_gf1_mem_proc_free; 95 entry->c.ops = &snd_gf1_mem_proc_ops; 96 priv->address = idx * 4096 * 1024; 97 priv->size = entry->size = gus->gf1.rom_memory; 98 } 99 } 100 } 101 return 0; 102} 103