148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
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// 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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