1 /* 2 * Interface for OSS sequencer emulation 3 * 4 * Copyright (C) 2000 Uros Bizjak <uros@kss-loka.si> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21 #include "opl3_voice.h" 22 23 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure); 24 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg); 25 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg); 26 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count); 27 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg); 28 29 /* */ 30 31 static inline mm_segment_t snd_enter_user(void) 32 { 33 mm_segment_t fs = get_fs(); 34 set_fs(get_ds()); 35 return fs; 36 } 37 38 static inline void snd_leave_user(mm_segment_t fs) 39 { 40 set_fs(fs); 41 } 42 43 /* operators */ 44 45 extern struct snd_midi_op opl3_ops; 46 47 static struct snd_seq_oss_callback oss_callback = { 48 .owner = THIS_MODULE, 49 .open = snd_opl3_open_seq_oss, 50 .close = snd_opl3_close_seq_oss, 51 .ioctl = snd_opl3_ioctl_seq_oss, 52 .load_patch = snd_opl3_load_patch_seq_oss, 53 .reset = snd_opl3_reset_seq_oss, 54 }; 55 56 static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct, 57 void *private_data, int atomic, int hop) 58 { 59 struct snd_opl3 *opl3 = private_data; 60 61 if (ev->type != SNDRV_SEQ_EVENT_OSS) 62 snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset); 63 return 0; 64 } 65 66 /* ------------------------------ */ 67 68 static void snd_opl3_oss_free_port(void *private_data) 69 { 70 struct snd_opl3 *opl3 = private_data; 71 72 snd_midi_channel_free_set(opl3->oss_chset); 73 } 74 75 static int snd_opl3_oss_create_port(struct snd_opl3 * opl3) 76 { 77 struct snd_seq_port_callback callbacks; 78 char name[32]; 79 int voices, opl_ver; 80 81 voices = (opl3->hardware < OPL3_HW_OPL3) ? 82 MAX_OPL2_VOICES : MAX_OPL3_VOICES; 83 opl3->oss_chset = snd_midi_channel_alloc_set(voices); 84 if (opl3->oss_chset == NULL) 85 return -ENOMEM; 86 opl3->oss_chset->private_data = opl3; 87 88 memset(&callbacks, 0, sizeof(callbacks)); 89 callbacks.owner = THIS_MODULE; 90 callbacks.event_input = snd_opl3_oss_event_input; 91 callbacks.private_free = snd_opl3_oss_free_port; 92 callbacks.private_data = opl3; 93 94 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; 95 sprintf(name, "OPL%i OSS Port", opl_ver); 96 97 opl3->oss_chset->client = opl3->seq_client; 98 opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks, 99 SNDRV_SEQ_PORT_CAP_WRITE, 100 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 101 SNDRV_SEQ_PORT_TYPE_MIDI_GM | 102 SNDRV_SEQ_PORT_TYPE_HARDWARE | 103 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, 104 voices, voices, 105 name); 106 if (opl3->oss_chset->port < 0) { 107 int port; 108 port = opl3->oss_chset->port; 109 snd_midi_channel_free_set(opl3->oss_chset); 110 return port; 111 } 112 return 0; 113 } 114 115 /* ------------------------------ */ 116 117 /* register OSS synth */ 118 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name) 119 { 120 struct snd_seq_oss_reg *arg; 121 struct snd_seq_device *dev; 122 123 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS, 124 sizeof(struct snd_seq_oss_reg), &dev) < 0) 125 return; 126 127 opl3->oss_seq_dev = dev; 128 strlcpy(dev->name, name, sizeof(dev->name)); 129 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev); 130 arg->type = SYNTH_TYPE_FM; 131 if (opl3->hardware < OPL3_HW_OPL3) { 132 arg->subtype = FM_TYPE_ADLIB; 133 arg->nvoices = MAX_OPL2_VOICES; 134 } else { 135 arg->subtype = FM_TYPE_OPL3; 136 arg->nvoices = MAX_OPL3_VOICES; 137 } 138 arg->oper = oss_callback; 139 arg->private_data = opl3; 140 141 if (snd_opl3_oss_create_port(opl3)) { 142 /* register to OSS synth table */ 143 snd_device_register(opl3->card, dev); 144 } 145 } 146 147 /* unregister */ 148 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3) 149 { 150 if (opl3->oss_seq_dev) { 151 /* The instance should have been released in prior */ 152 opl3->oss_seq_dev = NULL; 153 } 154 } 155 156 /* ------------------------------ */ 157 158 /* open OSS sequencer */ 159 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure) 160 { 161 struct snd_opl3 *opl3 = closure; 162 int err; 163 164 if (snd_BUG_ON(!arg)) 165 return -ENXIO; 166 167 if ((err = snd_opl3_synth_setup(opl3)) < 0) 168 return err; 169 170 /* fill the argument data */ 171 arg->private_data = opl3; 172 arg->addr.client = opl3->oss_chset->client; 173 arg->addr.port = opl3->oss_chset->port; 174 175 if ((err = snd_opl3_synth_use_inc(opl3)) < 0) 176 return err; 177 178 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH; 179 return 0; 180 } 181 182 /* close OSS sequencer */ 183 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) 184 { 185 struct snd_opl3 *opl3; 186 187 if (snd_BUG_ON(!arg)) 188 return -ENXIO; 189 opl3 = arg->private_data; 190 191 snd_opl3_synth_cleanup(opl3); 192 193 snd_opl3_synth_use_dec(opl3); 194 return 0; 195 } 196 197 /* load patch */ 198 199 /* from sound_config.h */ 200 #define SBFM_MAXINSTR 256 201 202 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, 203 const char __user *buf, int offs, int count) 204 { 205 struct snd_opl3 *opl3; 206 struct sbi_instrument sbi; 207 char name[32]; 208 int err, type; 209 210 if (snd_BUG_ON(!arg)) 211 return -ENXIO; 212 opl3 = arg->private_data; 213 214 if (format == FM_PATCH) 215 type = FM_PATCH_OPL2; 216 else if (format == OPL3_PATCH) 217 type = FM_PATCH_OPL3; 218 else 219 return -EINVAL; 220 221 if (count < (int)sizeof(sbi)) { 222 snd_printk(KERN_ERR "FM Error: Patch record too short\n"); 223 return -EINVAL; 224 } 225 if (copy_from_user(&sbi, buf, sizeof(sbi))) 226 return -EFAULT; 227 228 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) { 229 snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n", 230 sbi.channel); 231 return -EINVAL; 232 } 233 234 memset(name, 0, sizeof(name)); 235 sprintf(name, "Chan%d", sbi.channel); 236 237 err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL, 238 sbi.operators); 239 if (err < 0) 240 return err; 241 242 return sizeof(sbi); 243 } 244 245 /* ioctl */ 246 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, 247 unsigned long ioarg) 248 { 249 struct snd_opl3 *opl3; 250 251 if (snd_BUG_ON(!arg)) 252 return -ENXIO; 253 opl3 = arg->private_data; 254 switch (cmd) { 255 case SNDCTL_FM_LOAD_INSTR: 256 snd_printk(KERN_ERR "OPL3: " 257 "Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. " 258 "Fix the program.\n"); 259 return -EINVAL; 260 261 case SNDCTL_SYNTH_MEMAVL: 262 return 0x7fffffff; 263 264 case SNDCTL_FM_4OP_ENABLE: 265 // handled automatically by OPL instrument type 266 return 0; 267 268 default: 269 return -EINVAL; 270 } 271 return 0; 272 } 273 274 /* reset device */ 275 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) 276 { 277 struct snd_opl3 *opl3; 278 279 if (snd_BUG_ON(!arg)) 280 return -ENXIO; 281 opl3 = arg->private_data; 282 283 return 0; 284 } 285