1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * OSS compatible sequencer driver 4 * 5 * OSS compatible i/o control 6 * 7 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de> 8 */ 9 10 #include "seq_oss_device.h" 11 #include "seq_oss_readq.h" 12 #include "seq_oss_writeq.h" 13 #include "seq_oss_timer.h" 14 #include "seq_oss_synth.h" 15 #include "seq_oss_midi.h" 16 #include "seq_oss_event.h" 17 18 static int snd_seq_oss_synth_info_user(struct seq_oss_devinfo *dp, void __user *arg) 19 { 20 struct synth_info info; 21 22 if (copy_from_user(&info, arg, sizeof(info))) 23 return -EFAULT; 24 if (snd_seq_oss_synth_make_info(dp, info.device, &info) < 0) 25 return -EINVAL; 26 if (copy_to_user(arg, &info, sizeof(info))) 27 return -EFAULT; 28 return 0; 29 } 30 31 static int snd_seq_oss_midi_info_user(struct seq_oss_devinfo *dp, void __user *arg) 32 { 33 struct midi_info info; 34 35 if (copy_from_user(&info, arg, sizeof(info))) 36 return -EFAULT; 37 if (snd_seq_oss_midi_make_info(dp, info.device, &info) < 0) 38 return -EINVAL; 39 if (copy_to_user(arg, &info, sizeof(info))) 40 return -EFAULT; 41 return 0; 42 } 43 44 static int snd_seq_oss_oob_user(struct seq_oss_devinfo *dp, void __user *arg) 45 { 46 unsigned char ev[8]; 47 struct snd_seq_event tmpev; 48 49 if (copy_from_user(ev, arg, 8)) 50 return -EFAULT; 51 memset(&tmpev, 0, sizeof(tmpev)); 52 snd_seq_oss_fill_addr(dp, &tmpev, dp->addr.client, dp->addr.port); 53 tmpev.time.tick = 0; 54 if (! snd_seq_oss_process_event(dp, (union evrec *)ev, &tmpev)) { 55 snd_seq_oss_dispatch(dp, &tmpev, 0, 0); 56 } 57 return 0; 58 } 59 60 int 61 snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long carg) 62 { 63 int dev, val; 64 void __user *arg = (void __user *)carg; 65 int __user *p = arg; 66 67 switch (cmd) { 68 case SNDCTL_TMR_TIMEBASE: 69 case SNDCTL_TMR_TEMPO: 70 case SNDCTL_TMR_START: 71 case SNDCTL_TMR_STOP: 72 case SNDCTL_TMR_CONTINUE: 73 case SNDCTL_TMR_METRONOME: 74 case SNDCTL_TMR_SOURCE: 75 case SNDCTL_TMR_SELECT: 76 case SNDCTL_SEQ_CTRLRATE: 77 return snd_seq_oss_timer_ioctl(dp->timer, cmd, arg); 78 79 case SNDCTL_SEQ_PANIC: 80 snd_seq_oss_reset(dp); 81 return -EINVAL; 82 83 case SNDCTL_SEQ_SYNC: 84 if (! is_write_mode(dp->file_mode) || dp->writeq == NULL) 85 return 0; 86 while (snd_seq_oss_writeq_sync(dp->writeq)) 87 ; 88 if (signal_pending(current)) 89 return -ERESTARTSYS; 90 return 0; 91 92 case SNDCTL_SEQ_RESET: 93 snd_seq_oss_reset(dp); 94 return 0; 95 96 case SNDCTL_SEQ_TESTMIDI: 97 if (get_user(dev, p)) 98 return -EFAULT; 99 return snd_seq_oss_midi_open(dp, dev, dp->file_mode); 100 101 case SNDCTL_SEQ_GETINCOUNT: 102 if (dp->readq == NULL || ! is_read_mode(dp->file_mode)) 103 return 0; 104 return put_user(dp->readq->qlen, p) ? -EFAULT : 0; 105 106 case SNDCTL_SEQ_GETOUTCOUNT: 107 if (! is_write_mode(dp->file_mode) || dp->writeq == NULL) 108 return 0; 109 return put_user(snd_seq_oss_writeq_get_free_size(dp->writeq), p) ? -EFAULT : 0; 110 111 case SNDCTL_SEQ_GETTIME: 112 return put_user(snd_seq_oss_timer_cur_tick(dp->timer), p) ? -EFAULT : 0; 113 114 case SNDCTL_SEQ_RESETSAMPLES: 115 if (get_user(dev, p)) 116 return -EFAULT; 117 return snd_seq_oss_synth_ioctl(dp, dev, cmd, carg); 118 119 case SNDCTL_SEQ_NRSYNTHS: 120 return put_user(dp->max_synthdev, p) ? -EFAULT : 0; 121 122 case SNDCTL_SEQ_NRMIDIS: 123 return put_user(dp->max_mididev, p) ? -EFAULT : 0; 124 125 case SNDCTL_SYNTH_MEMAVL: 126 if (get_user(dev, p)) 127 return -EFAULT; 128 val = snd_seq_oss_synth_ioctl(dp, dev, cmd, carg); 129 return put_user(val, p) ? -EFAULT : 0; 130 131 case SNDCTL_FM_4OP_ENABLE: 132 if (get_user(dev, p)) 133 return -EFAULT; 134 snd_seq_oss_synth_ioctl(dp, dev, cmd, carg); 135 return 0; 136 137 case SNDCTL_SYNTH_INFO: 138 case SNDCTL_SYNTH_ID: 139 return snd_seq_oss_synth_info_user(dp, arg); 140 141 case SNDCTL_SEQ_OUTOFBAND: 142 return snd_seq_oss_oob_user(dp, arg); 143 144 case SNDCTL_MIDI_INFO: 145 return snd_seq_oss_midi_info_user(dp, arg); 146 147 case SNDCTL_SEQ_THRESHOLD: 148 if (! is_write_mode(dp->file_mode)) 149 return 0; 150 if (get_user(val, p)) 151 return -EFAULT; 152 if (val < 1) 153 val = 1; 154 if (val >= dp->writeq->maxlen) 155 val = dp->writeq->maxlen - 1; 156 snd_seq_oss_writeq_set_output(dp->writeq, val); 157 return 0; 158 159 case SNDCTL_MIDI_PRETIME: 160 if (dp->readq == NULL || !is_read_mode(dp->file_mode)) 161 return 0; 162 if (get_user(val, p)) 163 return -EFAULT; 164 if (val <= 0) 165 val = -1; 166 else 167 val = (HZ * val) / 10; 168 dp->readq->pre_event_timeout = val; 169 return put_user(val, p) ? -EFAULT : 0; 170 171 default: 172 if (! is_write_mode(dp->file_mode)) 173 return -EIO; 174 return snd_seq_oss_synth_ioctl(dp, 0, cmd, carg); 175 } 176 return 0; 177 } 178 179