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147 lines
3.3 KiB
147 lines
3.3 KiB
// 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 <[email protected]> |
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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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