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Linux/sound/isa/gus/gus_mem_proc.c

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  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 
 27 struct 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 
 34 static 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 
 49 static 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 
 55 static struct snd_info_entry_ops snd_gf1_mem_proc_ops = {
 56         .read = snd_gf1_mem_proc_dump,
 57 };
 58 
 59 int 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 

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