1 files changed, 166 insertions, 0 deletions

diff --git a/sound/drivers/opl4/opl4_proc.c b/sound/drivers/opl4/opl4_proc.c
new file mode 100644
index 000000000000..6a1486258acf
--- /dev/null
+++ b/sound/drivers/opl4/opl4_proc.c
@@ -0,0 +1,166 @@
+/*
+ * Functions for the OPL4 proc file
+ * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include "opl4_local.h"
+#include <linux/vmalloc.h>
+#include <sound/info.h>
+
+#ifdef CONFIG_PROC_FS
+
+static int snd_opl4_mem_proc_open(snd_info_entry_t *entry,
+                                  unsigned short mode, void **file_private_data)
+{
+        opl4_t *opl4 = entry->private_data;
+
+        down(&opl4->access_mutex);
+        if (opl4->memory_access) {
+                up(&opl4->access_mutex);
+                return -EBUSY;
+        }
+        opl4->memory_access++;
+        up(&opl4->access_mutex);
+        return 0;
+}
+
+static int snd_opl4_mem_proc_release(snd_info_entry_t *entry,
+                                     unsigned short mode, void *file_private_data)
+{
+        opl4_t *opl4 = entry->private_data;
+
+        down(&opl4->access_mutex);
+        opl4->memory_access--;
+        up(&opl4->access_mutex);
+        return 0;
+}
+
+static long snd_opl4_mem_proc_read(snd_info_entry_t *entry, void *file_private_data,
+                                   struct file *file, char __user *_buf,
+                                   unsigned long count, unsigned long pos)
+{
+        opl4_t *opl4 = entry->private_data;
+        long size;
+        char* buf;
+
+        size = count;
+        if (pos + size > entry->size)
+                size = entry->size - pos;
+        if (size > 0) {
+                buf = vmalloc(size);
+                if (!buf)
+                        return -ENOMEM;
+                snd_opl4_read_memory(opl4, buf, pos, size);
+                if (copy_to_user(_buf, buf, size)) {
+                        vfree(buf);
+                        return -EFAULT;
+                }
+                vfree(buf);
+                return size;
+        }
+        return 0;
+}
+
+static long snd_opl4_mem_proc_write(snd_info_entry_t *entry, void *file_private_data,
+                                    struct file *file, const char __user *_buf,
+                                    unsigned long count, unsigned long pos)
+{
+        opl4_t *opl4 = entry->private_data;
+        long size;
+        char *buf;
+
+        size = count;
+        if (pos + size > entry->size)
+                size = entry->size - pos;
+        if (size > 0) {
+                buf = vmalloc(size);
+                if (!buf)
+                        return -ENOMEM;
+                if (copy_from_user(buf, _buf, size)) {
+                        vfree(buf);
+                        return -EFAULT;
+                }
+                snd_opl4_write_memory(opl4, buf, pos, size);
+                vfree(buf);
+                return size;
+        }
+        return 0;
+}
+
+static long long snd_opl4_mem_proc_llseek(snd_info_entry_t *entry, void *file_private_data,
+                                          struct file *file, long long offset, int orig)
+{
+        switch (orig) {
+        case 0: /* SEEK_SET */
+                file->f_pos = offset;
+                break;
+        case 1: /* SEEK_CUR */
+                file->f_pos += offset;
+                break;
+        case 2: /* SEEK_END, offset is negative */
+                file->f_pos = entry->size + offset;
+                break;
+        default:
+                return -EINVAL;
+        }
+        if (file->f_pos > entry->size)
+                file->f_pos = entry->size;
+        return file->f_pos;
+}
+
+static struct snd_info_entry_ops snd_opl4_mem_proc_ops = {
+        .open = snd_opl4_mem_proc_open,
+        .release = snd_opl4_mem_proc_release,
+        .read = snd_opl4_mem_proc_read,
+        .write = snd_opl4_mem_proc_write,
+        .llseek = snd_opl4_mem_proc_llseek,
+};
+
+int snd_opl4_create_proc(opl4_t *opl4)
+{
+        snd_info_entry_t *entry;
+
+        entry = snd_info_create_card_entry(opl4->card, "opl4-mem", opl4->card->proc_root);
+        if (entry) {
+                if (opl4->hardware < OPL3_HW_OPL4_ML) {
+                        /* OPL4 can access 4 MB external ROM/SRAM */
+                        entry->mode |= S_IWUSR;
+                        entry->size = 4 * 1024 * 1024;
+                } else {
+                        /* OPL4-ML has 1 MB internal ROM */
+                        entry->size = 1 * 1024 * 1024;
+                }
+                entry->content = SNDRV_INFO_CONTENT_DATA;
+                entry->c.ops = &snd_opl4_mem_proc_ops;
+                entry->module = THIS_MODULE;
+                entry->private_data = opl4;
+                if (snd_info_register(entry) < 0) {
+                        snd_info_free_entry(entry);
+                        entry = NULL;
+                }
+        }
+        opl4->proc_entry = entry;
+        return 0;
+}
+
+void snd_opl4_free_proc(opl4_t *opl4)
+{
+        if (opl4->proc_entry)
+                snd_info_unregister(opl4->proc_entry);
+}
+
+#endif /* CONFIG_PROC_FS */