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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>
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Interface for hwdep device
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*
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* Copyright (C) 2004 Takashi Iwai <tiwai@suse.de>
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*/
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#include <sound/core.h>
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#include <sound/hwdep.h>
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#include <linux/uaccess.h>
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#include <linux/nospec.h>
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#include "emux_voice.h"
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#define TMP_CLIENT_ID 0x1001
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/*
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* load patch
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*/
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static int
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snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg)
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{
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int err;
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struct soundfont_patch_info patch;
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if (copy_from_user(&patch, arg, sizeof(patch)))
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return -EFAULT;
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if (patch.key == GUS_PATCH)
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return snd_soundfont_load_guspatch(emu->sflist, arg,
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patch.len + sizeof(patch),
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TMP_CLIENT_ID);
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if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
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patch.type <= SNDRV_SFNT_PROBE_DATA) {
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err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID);
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if (err < 0)
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return err;
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} else {
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if (emu->ops.load_fx)
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return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch));
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else
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return -EINVAL;
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}
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return 0;
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}
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/*
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* set misc mode
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*/
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static int
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snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg)
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{
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struct snd_emux_misc_mode info;
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int i;
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if (copy_from_user(&info, arg, sizeof(info)))
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return -EFAULT;
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if (info.mode < 0 || info.mode >= EMUX_MD_END)
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return -EINVAL;
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info.mode = array_index_nospec(info.mode, EMUX_MD_END);
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if (info.port < 0) {
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for (i = 0; i < emu->num_ports; i++)
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emu->portptrs[i]->ctrls[info.mode] = info.value;
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} else {
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if (info.port < emu->num_ports) {
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info.port = array_index_nospec(info.port, emu->num_ports);
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emu->portptrs[info.port]->ctrls[info.mode] = info.value;
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}
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}
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return 0;
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}
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/*
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* ioctl
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*/
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static int
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snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct snd_emux *emu = hw->private_data;
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switch (cmd) {
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case SNDRV_EMUX_IOCTL_VERSION:
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return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg);
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case SNDRV_EMUX_IOCTL_LOAD_PATCH:
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return snd_emux_hwdep_load_patch(emu, (void __user *)arg);
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case SNDRV_EMUX_IOCTL_RESET_SAMPLES:
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snd_soundfont_remove_samples(emu->sflist);
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break;
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case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES:
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snd_soundfont_remove_unlocked(emu->sflist);
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break;
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case SNDRV_EMUX_IOCTL_MEM_AVAIL:
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if (emu->memhdr) {
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int size = snd_util_mem_avail(emu->memhdr);
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return put_user(size, (unsigned int __user *)arg);
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}
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break;
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case SNDRV_EMUX_IOCTL_MISC_MODE:
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return snd_emux_hwdep_misc_mode(emu, (void __user *)arg);
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}
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return 0;
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}
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/*
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* register hwdep device
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*/
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int
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snd_emux_init_hwdep(struct snd_emux *emu)
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{
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struct snd_hwdep *hw;
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int err;
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if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0)
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return err;
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emu->hwdep = hw;
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strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
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hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
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hw->ops.ioctl = snd_emux_hwdep_ioctl;
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/* The ioctl parameter types are compatible between 32- and
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* 64-bit architectures, so use the same function. */
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hw->ops.ioctl_compat = snd_emux_hwdep_ioctl;
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hw->exclusive = 1;
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hw->private_data = emu;
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if ((err = snd_card_register(emu->card)) < 0)
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return err;
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return 0;
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}
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/*
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* unregister
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*/
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void
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snd_emux_delete_hwdep(struct snd_emux *emu)
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{
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if (emu->hwdep) {
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snd_device_free(emu->card, emu->hwdep);
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emu->hwdep = NULL;
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}
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}
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