73029e0ff1
The llseek implementation is identical for existing driver implementations, so let's merge to the common layer. The same code for the text proc file can be used even for the binary proc file. The driver can provide its own llseek method if needed. Then the common code will be skipped. Signed-off-by: Takashi Iwai <tiwai@suse.de>
102 lines
3 KiB
C
102 lines
3 KiB
C
/*
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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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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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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 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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