drm/i915/selftests: Fix engine reset count storage for multi-tile
[platform/kernel/linux-starfive.git] / sound / synth / emux / emux_hwdep.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Interface for hwdep device
4  *
5  *  Copyright (C) 2004 Takashi Iwai <tiwai@suse.de>
6  */
7
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"
13
14 #define TMP_CLIENT_ID   0x1001
15
16 /*
17  * load patch
18  */
19 static int
20 snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg)
21 {
22         int err;
23         struct soundfont_patch_info patch;
24
25         if (copy_from_user(&patch, arg, sizeof(patch)))
26                 return -EFAULT;
27
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
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
51 snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg)
52 {
53         struct snd_emux_misc_mode info;
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;
60         info.mode = array_index_nospec(info.mode, EMUX_MD_END);
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 {
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;
69                 }
70         }
71         return 0;
72 }
73
74
75 /*
76  * ioctl
77  */
78 static int
79 snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
80                      unsigned int cmd, unsigned long arg)
81 {
82         struct snd_emux *emu = hw->private_data;
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
114 snd_emux_init_hwdep(struct snd_emux *emu)
115 {
116         struct snd_hwdep *hw;
117         int err;
118
119         err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw);
120         if (err < 0)
121                 return err;
122         emu->hwdep = 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;
129         hw->exclusive = 1;
130         hw->private_data = emu;
131         err = snd_card_register(emu->card);
132         if (err < 0)
133                 return err;
134
135         return 0;
136 }
137
138
139 /*
140  * unregister
141  */
142 void
143 snd_emux_delete_hwdep(struct snd_emux *emu)
144 {
145         if (emu->hwdep) {
146                 snd_device_free(emu->card, emu->hwdep);
147                 emu->hwdep = NULL;
148         }
149 }