1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Interface for hwdep device
5 * Copyright (C) 2004 Takashi Iwai <tiwai@suse.de>
8 #include <sound/core.h>
9 #include <sound/hwdep.h>
10 #include <linux/uaccess.h>
11 #include <linux/nospec.h>
12 #include "emux_voice.h"
14 #define TMP_CLIENT_ID 0x1001
20 snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg)
23 struct soundfont_patch_info patch;
25 if (copy_from_user(&patch, arg, sizeof(patch)))
28 if (patch.key == GUS_PATCH)
29 return snd_soundfont_load_guspatch(emu->sflist, arg,
30 patch.len + sizeof(patch),
33 if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
34 patch.type <= SNDRV_SFNT_PROBE_DATA) {
35 err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID);
40 return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch));
51 snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg)
53 struct snd_emux_misc_mode info;
56 if (copy_from_user(&info, arg, sizeof(info)))
58 if (info.mode < 0 || info.mode >= EMUX_MD_END)
60 info.mode = array_index_nospec(info.mode, EMUX_MD_END);
63 for (i = 0; i < emu->num_ports; i++)
64 emu->portptrs[i]->ctrls[info.mode] = info.value;
66 if (info.port < emu->num_ports) {
67 info.port = array_index_nospec(info.port, emu->num_ports);
68 emu->portptrs[info.port]->ctrls[info.mode] = info.value;
79 snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
80 unsigned int cmd, unsigned long arg)
82 struct snd_emux *emu = hw->private_data;
85 case SNDRV_EMUX_IOCTL_VERSION:
86 return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg);
87 case SNDRV_EMUX_IOCTL_LOAD_PATCH:
88 return snd_emux_hwdep_load_patch(emu, (void __user *)arg);
89 case SNDRV_EMUX_IOCTL_RESET_SAMPLES:
90 snd_soundfont_remove_samples(emu->sflist);
92 case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES:
93 snd_soundfont_remove_unlocked(emu->sflist);
95 case SNDRV_EMUX_IOCTL_MEM_AVAIL:
97 int size = snd_util_mem_avail(emu->memhdr);
98 return put_user(size, (unsigned int __user *)arg);
101 case SNDRV_EMUX_IOCTL_MISC_MODE:
102 return snd_emux_hwdep_misc_mode(emu, (void __user *)arg);
110 * register hwdep device
114 snd_emux_init_hwdep(struct snd_emux *emu)
116 struct snd_hwdep *hw;
119 err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw);
123 strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
124 hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
125 hw->ops.ioctl = snd_emux_hwdep_ioctl;
126 /* The ioctl parameter types are compatible between 32- and
127 * 64-bit architectures, so use the same function. */
128 hw->ops.ioctl_compat = snd_emux_hwdep_ioctl;
130 hw->private_data = emu;
131 err = snd_card_register(emu->card);
143 snd_emux_delete_hwdep(struct snd_emux *emu)
146 snd_device_free(emu->card, emu->hwdep);