1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Interface for OSS sequencer emulation 4 * 5 * Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si> 6 */ 7 8 #include <linux/export.h> 9 #include "opl3_voice.h" 10 11 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure); 12 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg); 13 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg); 14 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count); 15 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg); 16 17 /* operators */ 18 19 static const struct snd_seq_oss_callback oss_callback = { 20 .owner = THIS_MODULE, 21 .open = snd_opl3_open_seq_oss, 22 .close = snd_opl3_close_seq_oss, 23 .ioctl = snd_opl3_ioctl_seq_oss, 24 .load_patch = snd_opl3_load_patch_seq_oss, 25 .reset = snd_opl3_reset_seq_oss, 26 }; 27 28 static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct, 29 void *private_data, int atomic, int hop) 30 { 31 struct snd_opl3 *opl3 = private_data; 32 33 if (ev->type != SNDRV_SEQ_EVENT_OSS) 34 snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset); 35 return 0; 36 } 37 38 /* ------------------------------ */ 39 40 static void snd_opl3_oss_free_port(void *private_data) 41 { 42 struct snd_opl3 *opl3 = private_data; 43 44 snd_midi_channel_free_set(opl3->oss_chset); 45 } 46 47 static int snd_opl3_oss_create_port(struct snd_opl3 * opl3) 48 { 49 struct snd_seq_port_callback callbacks; 50 char name[32]; 51 int voices, opl_ver; 52 53 voices = (opl3->hardware < OPL3_HW_OPL3) ? 54 MAX_OPL2_VOICES : MAX_OPL3_VOICES; 55 opl3->oss_chset = snd_midi_channel_alloc_set(voices); 56 if (opl3->oss_chset == NULL) 57 return -ENOMEM; 58 opl3->oss_chset->private_data = opl3; 59 60 memset(&callbacks, 0, sizeof(callbacks)); 61 callbacks.owner = THIS_MODULE; 62 callbacks.event_input = snd_opl3_oss_event_input; 63 callbacks.private_free = snd_opl3_oss_free_port; 64 callbacks.private_data = opl3; 65 66 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; 67 sprintf(name, "OPL%i OSS Port", opl_ver); 68 69 opl3->oss_chset->client = opl3->seq_client; 70 opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks, 71 SNDRV_SEQ_PORT_CAP_WRITE, 72 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 73 SNDRV_SEQ_PORT_TYPE_MIDI_GM | 74 SNDRV_SEQ_PORT_TYPE_HARDWARE | 75 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, 76 voices, voices, 77 name); 78 if (opl3->oss_chset->port < 0) { 79 int port; 80 port = opl3->oss_chset->port; 81 snd_midi_channel_free_set(opl3->oss_chset); 82 return port; 83 } 84 return 0; 85 } 86 87 /* ------------------------------ */ 88 89 /* register OSS synth */ 90 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name) 91 { 92 struct snd_seq_oss_reg *arg; 93 struct snd_seq_device *dev; 94 95 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS, 96 sizeof(struct snd_seq_oss_reg), &dev) < 0) 97 return; 98 99 opl3->oss_seq_dev = dev; 100 strscpy(dev->name, name, sizeof(dev->name)); 101 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev); 102 arg->type = SYNTH_TYPE_FM; 103 if (opl3->hardware < OPL3_HW_OPL3) { 104 arg->subtype = FM_TYPE_ADLIB; 105 arg->nvoices = MAX_OPL2_VOICES; 106 } else { 107 arg->subtype = FM_TYPE_OPL3; 108 arg->nvoices = MAX_OPL3_VOICES; 109 } 110 arg->oper = oss_callback; 111 arg->private_data = opl3; 112 113 if (snd_opl3_oss_create_port(opl3)) { 114 /* register to OSS synth table */ 115 snd_device_register(opl3->card, dev); 116 } 117 } 118 119 /* unregister */ 120 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3) 121 { 122 if (opl3->oss_seq_dev) { 123 /* The instance should have been released in prior */ 124 opl3->oss_seq_dev = NULL; 125 } 126 } 127 128 /* ------------------------------ */ 129 130 /* open OSS sequencer */ 131 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure) 132 { 133 struct snd_opl3 *opl3 = closure; 134 int err; 135 136 if (snd_BUG_ON(!arg)) 137 return -ENXIO; 138 139 err = snd_opl3_synth_setup(opl3); 140 if (err < 0) 141 return err; 142 143 /* fill the argument data */ 144 arg->private_data = opl3; 145 arg->addr.client = opl3->oss_chset->client; 146 arg->addr.port = opl3->oss_chset->port; 147 148 err = snd_opl3_synth_use_inc(opl3); 149 if (err < 0) 150 return err; 151 152 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH; 153 return 0; 154 } 155 156 /* close OSS sequencer */ 157 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) 158 { 159 struct snd_opl3 *opl3; 160 161 if (snd_BUG_ON(!arg)) 162 return -ENXIO; 163 opl3 = arg->private_data; 164 165 snd_opl3_synth_cleanup(opl3); 166 167 snd_opl3_synth_use_dec(opl3); 168 return 0; 169 } 170 171 /* load patch */ 172 173 /* from sound_config.h */ 174 #define SBFM_MAXINSTR 256 175 176 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, 177 const char __user *buf, int offs, int count) 178 { 179 struct snd_opl3 *opl3; 180 struct sbi_instrument sbi; 181 char name[32]; 182 int err, type; 183 184 if (snd_BUG_ON(!arg)) 185 return -ENXIO; 186 opl3 = arg->private_data; 187 188 if (format == FM_PATCH) 189 type = FM_PATCH_OPL2; 190 else if (format == OPL3_PATCH) 191 type = FM_PATCH_OPL3; 192 else 193 return -EINVAL; 194 195 if (count < (int)sizeof(sbi)) { 196 snd_printk(KERN_ERR "FM Error: Patch record too short\n"); 197 return -EINVAL; 198 } 199 if (copy_from_user(&sbi, buf, sizeof(sbi))) 200 return -EFAULT; 201 202 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) { 203 snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n", 204 sbi.channel); 205 return -EINVAL; 206 } 207 208 memset(name, 0, sizeof(name)); 209 sprintf(name, "Chan%d", sbi.channel); 210 211 err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL, 212 sbi.operators); 213 if (err < 0) 214 return err; 215 216 return sizeof(sbi); 217 } 218 219 /* ioctl */ 220 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, 221 unsigned long ioarg) 222 { 223 if (snd_BUG_ON(!arg)) 224 return -ENXIO; 225 switch (cmd) { 226 case SNDCTL_FM_LOAD_INSTR: 227 snd_printk(KERN_ERR "OPL3: " 228 "Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. " 229 "Fix the program.\n"); 230 return -EINVAL; 231 232 case SNDCTL_SYNTH_MEMAVL: 233 return 0x7fffffff; 234 235 case SNDCTL_FM_4OP_ENABLE: 236 // handled automatically by OPL instrument type 237 return 0; 238 239 default: 240 return -EINVAL; 241 } 242 return 0; 243 } 244 245 /* reset device */ 246 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) 247 { 248 if (snd_BUG_ON(!arg)) 249 return -ENXIO; 250 251 return 0; 252 } 253