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Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Interface for hwdep device | |
4 | * | |
5 | * Copyright (C) 2004 Takashi Iwai <tiwai@suse.de> | |
1da177e4 LT |
6 | */ |
7 | ||
1da177e4 LT |
8 | #include <sound/core.h> |
9 | #include <sound/hwdep.h> | |
976412fb | 10 | #include <linux/uaccess.h> |
4aea96f4 | 11 | #include <linux/nospec.h> |
1da177e4 LT |
12 | #include "emux_voice.h" |
13 | ||
1da177e4 LT |
14 | #define TMP_CLIENT_ID 0x1001 |
15 | ||
16 | /* | |
17 | * load patch | |
18 | */ | |
19 | static int | |
03da312a | 20 | snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg) |
1da177e4 LT |
21 | { |
22 | int err; | |
03da312a | 23 | struct soundfont_patch_info patch; |
1da177e4 LT |
24 | |
25 | if (copy_from_user(&patch, arg, sizeof(patch))) | |
26 | return -EFAULT; | |
27 | ||
e42dd3ee TI |
28 | if (patch.key == GUS_PATCH) |
29 | return snd_soundfont_load_guspatch(emu->sflist, arg, | |
30 | patch.len + sizeof(patch), | |
31 | TMP_CLIENT_ID); | |
32 | ||
1da177e4 LT |
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); | |
36 | if (err < 0) | |
37 | return err; | |
38 | } else { | |
39 | if (emu->ops.load_fx) | |
40 | return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch)); | |
41 | else | |
42 | return -EINVAL; | |
43 | } | |
44 | return 0; | |
45 | } | |
46 | ||
47 | /* | |
48 | * set misc mode | |
49 | */ | |
50 | static int | |
03da312a | 51 | snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg) |
1da177e4 | 52 | { |
03da312a | 53 | struct snd_emux_misc_mode info; |
1da177e4 LT |
54 | int i; |
55 | ||
56 | if (copy_from_user(&info, arg, sizeof(info))) | |
57 | return -EFAULT; | |
58 | if (info.mode < 0 || info.mode >= EMUX_MD_END) | |
59 | return -EINVAL; | |
4aea96f4 | 60 | info.mode = array_index_nospec(info.mode, EMUX_MD_END); |
1da177e4 LT |
61 | |
62 | if (info.port < 0) { | |
63 | for (i = 0; i < emu->num_ports; i++) | |
64 | emu->portptrs[i]->ctrls[info.mode] = info.value; | |
65 | } else { | |
4aea96f4 GS |
66 | if (info.port < emu->num_ports) { |
67 | info.port = array_index_nospec(info.port, emu->num_ports); | |
1da177e4 | 68 | emu->portptrs[info.port]->ctrls[info.mode] = info.value; |
4aea96f4 | 69 | } |
1da177e4 LT |
70 | } |
71 | return 0; | |
72 | } | |
73 | ||
74 | ||
75 | /* | |
76 | * ioctl | |
77 | */ | |
78 | static int | |
03da312a TI |
79 | snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file, |
80 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 81 | { |
03da312a | 82 | struct snd_emux *emu = hw->private_data; |
1da177e4 LT |
83 | |
84 | switch (cmd) { | |
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); | |
91 | break; | |
92 | case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES: | |
93 | snd_soundfont_remove_unlocked(emu->sflist); | |
94 | break; | |
95 | case SNDRV_EMUX_IOCTL_MEM_AVAIL: | |
96 | if (emu->memhdr) { | |
97 | int size = snd_util_mem_avail(emu->memhdr); | |
98 | return put_user(size, (unsigned int __user *)arg); | |
99 | } | |
100 | break; | |
101 | case SNDRV_EMUX_IOCTL_MISC_MODE: | |
102 | return snd_emux_hwdep_misc_mode(emu, (void __user *)arg); | |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | ||
109 | /* | |
110 | * register hwdep device | |
111 | */ | |
112 | ||
113 | int | |
03da312a | 114 | snd_emux_init_hwdep(struct snd_emux *emu) |
1da177e4 | 115 | { |
03da312a | 116 | struct snd_hwdep *hw; |
1da177e4 LT |
117 | int err; |
118 | ||
119 | if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0) | |
120 | return err; | |
121 | emu->hwdep = hw; | |
122 | strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME); | |
123 | hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE; | |
1da177e4 | 124 | hw->ops.ioctl = snd_emux_hwdep_ioctl; |
a254dba3 BH |
125 | /* The ioctl parameter types are compatible between 32- and |
126 | * 64-bit architectures, so use the same function. */ | |
127 | hw->ops.ioctl_compat = snd_emux_hwdep_ioctl; | |
1da177e4 LT |
128 | hw->exclusive = 1; |
129 | hw->private_data = emu; | |
130 | if ((err = snd_card_register(emu->card)) < 0) | |
131 | return err; | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | ||
137 | /* | |
138 | * unregister | |
139 | */ | |
140 | void | |
03da312a | 141 | snd_emux_delete_hwdep(struct snd_emux *emu) |
1da177e4 LT |
142 | { |
143 | if (emu->hwdep) { | |
144 | snd_device_free(emu->card, emu->hwdep); | |
145 | emu->hwdep = NULL; | |
146 | } | |
147 | } |