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