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