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 if ((err = snd_opl3_synth_setup(opl3)) < 0) 140 return err; 141 142 /* fill the argument data */ 143 arg->private_data = opl3; 144 arg->addr.client = opl3->oss_chset->client; 145 arg->addr.port = opl3->oss_chset->port; 146 147 if ((err = snd_opl3_synth_use_inc(opl3)) < 0) 148 return err; 149 150 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH; 151 return 0; 152 } 153 154 /* close OSS sequencer */ 155 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) 156 { 157 struct snd_opl3 *opl3; 158 159 if (snd_BUG_ON(!arg)) 160 return -ENXIO; 161 opl3 = arg->private_data; 162 163 snd_opl3_synth_cleanup(opl3); 164 165 snd_opl3_synth_use_dec(opl3); 166 return 0; 167 } 168 169 /* load patch */ 170 171 /* from sound_config.h */ 172 #define SBFM_MAXINSTR 256 173 174 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, 175 const char __user *buf, int offs, int count) 176 { 177 struct snd_opl3 *opl3; 178 struct sbi_instrument sbi; 179 char name[32]; 180 int err, type; 181 182 if (snd_BUG_ON(!arg)) 183 return -ENXIO; 184 opl3 = arg->private_data; 185 186 if (format == FM_PATCH) 187 type = FM_PATCH_OPL2; 188 else if (format == OPL3_PATCH) 189 type = FM_PATCH_OPL3; 190 else 191 return -EINVAL; 192 193 if (count < (int)sizeof(sbi)) { 194 snd_printk(KERN_ERR "FM Error: Patch record too short\n"); 195 return -EINVAL; 196 } 197 if (copy_from_user(&sbi, buf, sizeof(sbi))) 198 return -EFAULT; 199 200 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) { 201 snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n", 202 sbi.channel); 203 return -EINVAL; 204 } 205 206 memset(name, 0, sizeof(name)); 207 sprintf(name, "Chan%d", sbi.channel); 208 209 err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL, 210 sbi.operators); 211 if (err < 0) 212 return err; 213 214 return sizeof(sbi); 215 } 216 217 /* ioctl */ 218 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, 219 unsigned long ioarg) 220 { 221 if (snd_BUG_ON(!arg)) 222 return -ENXIO; 223 switch (cmd) { 224 case SNDCTL_FM_LOAD_INSTR: 225 snd_printk(KERN_ERR "OPL3: " 226 "Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. " 227 "Fix the program.\n"); 228 return -EINVAL; 229 230 case SNDCTL_SYNTH_MEMAVL: 231 return 0x7fffffff; 232 233 case SNDCTL_FM_4OP_ENABLE: 234 // handled automatically by OPL instrument type 235 return 0; 236 237 default: 238 return -EINVAL; 239 } 240 return 0; 241 } 242 243 /* reset device */ 244 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) 245 { 246 if (snd_BUG_ON(!arg)) 247 return -ENXIO; 248 249 return 0; 250 } 251