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 <linux/export.h> 22 #include "opl3_voice.h" 23 24 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure); 25 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg); 26 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg); 27 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, const char __user *buf, int offs, int count); 28 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg); 29 30 /* */ 31 32 static inline mm_segment_t snd_enter_user(void) 33 { 34 mm_segment_t fs = get_fs(); 35 set_fs(get_ds()); 36 return fs; 37 } 38 39 static inline void snd_leave_user(mm_segment_t fs) 40 { 41 set_fs(fs); 42 } 43 44 /* operators */ 45 46 extern struct snd_midi_op opl3_ops; 47 48 static struct snd_seq_oss_callback oss_callback = { 49 .owner = THIS_MODULE, 50 .open = snd_opl3_open_seq_oss, 51 .close = snd_opl3_close_seq_oss, 52 .ioctl = snd_opl3_ioctl_seq_oss, 53 .load_patch = snd_opl3_load_patch_seq_oss, 54 .reset = snd_opl3_reset_seq_oss, 55 }; 56 57 static int snd_opl3_oss_event_input(struct snd_seq_event *ev, int direct, 58 void *private_data, int atomic, int hop) 59 { 60 struct snd_opl3 *opl3 = private_data; 61 62 if (ev->type != SNDRV_SEQ_EVENT_OSS) 63 snd_midi_process_event(&opl3_ops, ev, opl3->oss_chset); 64 return 0; 65 } 66 67 /* ------------------------------ */ 68 69 static void snd_opl3_oss_free_port(void *private_data) 70 { 71 struct snd_opl3 *opl3 = private_data; 72 73 snd_midi_channel_free_set(opl3->oss_chset); 74 } 75 76 static int snd_opl3_oss_create_port(struct snd_opl3 * opl3) 77 { 78 struct snd_seq_port_callback callbacks; 79 char name[32]; 80 int voices, opl_ver; 81 82 voices = (opl3->hardware < OPL3_HW_OPL3) ? 83 MAX_OPL2_VOICES : MAX_OPL3_VOICES; 84 opl3->oss_chset = snd_midi_channel_alloc_set(voices); 85 if (opl3->oss_chset == NULL) 86 return -ENOMEM; 87 opl3->oss_chset->private_data = opl3; 88 89 memset(&callbacks, 0, sizeof(callbacks)); 90 callbacks.owner = THIS_MODULE; 91 callbacks.event_input = snd_opl3_oss_event_input; 92 callbacks.private_free = snd_opl3_oss_free_port; 93 callbacks.private_data = opl3; 94 95 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8; 96 sprintf(name, "OPL%i OSS Port", opl_ver); 97 98 opl3->oss_chset->client = opl3->seq_client; 99 opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks, 100 SNDRV_SEQ_PORT_CAP_WRITE, 101 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | 102 SNDRV_SEQ_PORT_TYPE_MIDI_GM | 103 SNDRV_SEQ_PORT_TYPE_HARDWARE | 104 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, 105 voices, voices, 106 name); 107 if (opl3->oss_chset->port < 0) { 108 int port; 109 port = opl3->oss_chset->port; 110 snd_midi_channel_free_set(opl3->oss_chset); 111 return port; 112 } 113 return 0; 114 } 115 116 /* ------------------------------ */ 117 118 /* register OSS synth */ 119 void snd_opl3_init_seq_oss(struct snd_opl3 *opl3, char *name) 120 { 121 struct snd_seq_oss_reg *arg; 122 struct snd_seq_device *dev; 123 124 if (snd_seq_device_new(opl3->card, 0, SNDRV_SEQ_DEV_ID_OSS, 125 sizeof(struct snd_seq_oss_reg), &dev) < 0) 126 return; 127 128 opl3->oss_seq_dev = dev; 129 strlcpy(dev->name, name, sizeof(dev->name)); 130 arg = SNDRV_SEQ_DEVICE_ARGPTR(dev); 131 arg->type = SYNTH_TYPE_FM; 132 if (opl3->hardware < OPL3_HW_OPL3) { 133 arg->subtype = FM_TYPE_ADLIB; 134 arg->nvoices = MAX_OPL2_VOICES; 135 } else { 136 arg->subtype = FM_TYPE_OPL3; 137 arg->nvoices = MAX_OPL3_VOICES; 138 } 139 arg->oper = oss_callback; 140 arg->private_data = opl3; 141 142 if (snd_opl3_oss_create_port(opl3)) { 143 /* register to OSS synth table */ 144 snd_device_register(opl3->card, dev); 145 } 146 } 147 148 /* unregister */ 149 void snd_opl3_free_seq_oss(struct snd_opl3 *opl3) 150 { 151 if (opl3->oss_seq_dev) { 152 /* The instance should have been released in prior */ 153 opl3->oss_seq_dev = NULL; 154 } 155 } 156 157 /* ------------------------------ */ 158 159 /* open OSS sequencer */ 160 static int snd_opl3_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure) 161 { 162 struct snd_opl3 *opl3 = closure; 163 int err; 164 165 if (snd_BUG_ON(!arg)) 166 return -ENXIO; 167 168 if ((err = snd_opl3_synth_setup(opl3)) < 0) 169 return err; 170 171 /* fill the argument data */ 172 arg->private_data = opl3; 173 arg->addr.client = opl3->oss_chset->client; 174 arg->addr.port = opl3->oss_chset->port; 175 176 if ((err = snd_opl3_synth_use_inc(opl3)) < 0) 177 return err; 178 179 opl3->synth_mode = SNDRV_OPL3_MODE_SYNTH; 180 return 0; 181 } 182 183 /* close OSS sequencer */ 184 static int snd_opl3_close_seq_oss(struct snd_seq_oss_arg *arg) 185 { 186 struct snd_opl3 *opl3; 187 188 if (snd_BUG_ON(!arg)) 189 return -ENXIO; 190 opl3 = arg->private_data; 191 192 snd_opl3_synth_cleanup(opl3); 193 194 snd_opl3_synth_use_dec(opl3); 195 return 0; 196 } 197 198 /* load patch */ 199 200 /* from sound_config.h */ 201 #define SBFM_MAXINSTR 256 202 203 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format, 204 const char __user *buf, int offs, int count) 205 { 206 struct snd_opl3 *opl3; 207 struct sbi_instrument sbi; 208 char name[32]; 209 int err, type; 210 211 if (snd_BUG_ON(!arg)) 212 return -ENXIO; 213 opl3 = arg->private_data; 214 215 if (format == FM_PATCH) 216 type = FM_PATCH_OPL2; 217 else if (format == OPL3_PATCH) 218 type = FM_PATCH_OPL3; 219 else 220 return -EINVAL; 221 222 if (count < (int)sizeof(sbi)) { 223 snd_printk(KERN_ERR "FM Error: Patch record too short\n"); 224 return -EINVAL; 225 } 226 if (copy_from_user(&sbi, buf, sizeof(sbi))) 227 return -EFAULT; 228 229 if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) { 230 snd_printk(KERN_ERR "FM Error: Invalid instrument number %d\n", 231 sbi.channel); 232 return -EINVAL; 233 } 234 235 memset(name, 0, sizeof(name)); 236 sprintf(name, "Chan%d", sbi.channel); 237 238 err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL, 239 sbi.operators); 240 if (err < 0) 241 return err; 242 243 return sizeof(sbi); 244 } 245 246 /* ioctl */ 247 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, 248 unsigned long ioarg) 249 { 250 struct snd_opl3 *opl3; 251 252 if (snd_BUG_ON(!arg)) 253 return -ENXIO; 254 opl3 = arg->private_data; 255 switch (cmd) { 256 case SNDCTL_FM_LOAD_INSTR: 257 snd_printk(KERN_ERR "OPL3: " 258 "Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. " 259 "Fix the program.\n"); 260 return -EINVAL; 261 262 case SNDCTL_SYNTH_MEMAVL: 263 return 0x7fffffff; 264 265 case SNDCTL_FM_4OP_ENABLE: 266 // handled automatically by OPL instrument type 267 return 0; 268 269 default: 270 return -EINVAL; 271 } 272 return 0; 273 } 274 275 /* reset device */ 276 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg) 277 { 278 struct snd_opl3 *opl3; 279 280 if (snd_BUG_ON(!arg)) 281 return -ENXIO; 282 opl3 = arg->private_data; 283 284 return 0; 285 } 286