1a59d1b8e0
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
113 lines
2.7 KiB
C
113 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Functions for the OPL4 proc file
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* Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
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*/
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#include "opl4_local.h"
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#include <linux/vmalloc.h>
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#include <linux/export.h>
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#include <sound/info.h>
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static int snd_opl4_mem_proc_open(struct snd_info_entry *entry,
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unsigned short mode, void **file_private_data)
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{
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struct snd_opl4 *opl4 = entry->private_data;
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mutex_lock(&opl4->access_mutex);
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if (opl4->memory_access) {
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mutex_unlock(&opl4->access_mutex);
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return -EBUSY;
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}
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opl4->memory_access++;
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mutex_unlock(&opl4->access_mutex);
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return 0;
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}
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static int snd_opl4_mem_proc_release(struct snd_info_entry *entry,
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unsigned short mode, void *file_private_data)
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{
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struct snd_opl4 *opl4 = entry->private_data;
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mutex_lock(&opl4->access_mutex);
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opl4->memory_access--;
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mutex_unlock(&opl4->access_mutex);
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return 0;
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}
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static ssize_t snd_opl4_mem_proc_read(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 snd_opl4 *opl4 = entry->private_data;
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char* buf;
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buf = vmalloc(count);
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if (!buf)
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return -ENOMEM;
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snd_opl4_read_memory(opl4, buf, pos, count);
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if (copy_to_user(_buf, buf, count)) {
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vfree(buf);
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return -EFAULT;
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}
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vfree(buf);
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return count;
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}
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static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry,
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void *file_private_data,
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struct file *file,
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const char __user *_buf,
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size_t count, loff_t pos)
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{
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struct snd_opl4 *opl4 = entry->private_data;
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char *buf;
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buf = vmalloc(count);
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if (!buf)
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return -ENOMEM;
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if (copy_from_user(buf, _buf, count)) {
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vfree(buf);
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return -EFAULT;
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}
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snd_opl4_write_memory(opl4, buf, pos, count);
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vfree(buf);
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return count;
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}
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static struct snd_info_entry_ops snd_opl4_mem_proc_ops = {
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.open = snd_opl4_mem_proc_open,
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.release = snd_opl4_mem_proc_release,
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.read = snd_opl4_mem_proc_read,
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.write = snd_opl4_mem_proc_write,
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};
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int snd_opl4_create_proc(struct snd_opl4 *opl4)
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{
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struct snd_info_entry *entry;
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entry = snd_info_create_card_entry(opl4->card, "opl4-mem", opl4->card->proc_root);
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if (entry) {
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if (opl4->hardware < OPL3_HW_OPL4_ML) {
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/* OPL4 can access 4 MB external ROM/SRAM */
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entry->mode |= 0200;
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entry->size = 4 * 1024 * 1024;
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} else {
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/* OPL4-ML has 1 MB internal ROM */
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entry->size = 1 * 1024 * 1024;
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}
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entry->content = SNDRV_INFO_CONTENT_DATA;
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entry->c.ops = &snd_opl4_mem_proc_ops;
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entry->module = THIS_MODULE;
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entry->private_data = opl4;
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}
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opl4->proc_entry = entry;
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return 0;
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}
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void snd_opl4_free_proc(struct snd_opl4 *opl4)
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{
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snd_info_free_entry(opl4->proc_entry);
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}
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