sound/drivers/opl3/opl3_oss.c

   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 #include <linux/slab.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         snd_assert(arg != NULL, 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         snd_assert(arg != NULL, return -ENXIO);
 188         opl3 = arg->private_data;
 189
 190         snd_opl3_synth_cleanup(opl3);
 191
 192         snd_opl3_synth_use_dec(opl3);
 193         return 0;
 194 }
 195
 196 /* load patch */
 197
 198 /* from sound_config.h */
 199 #define SBFM_MAXINSTR   256
 200
 201 static int snd_opl3_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
 202                                        const char __user *buf, int offs, int count)
 203 {
 204         struct snd_opl3 *opl3;
 205         struct sbi_instrument sbi;
 206         char name[32];
 207         int err, type;
 208
 209         snd_assert(arg != NULL, return -ENXIO);
 210         opl3 = arg->private_data;
 211
 212         if (format == FM_PATCH)
 213                 type = FM_PATCH_OPL2;
 214         else if (format == OPL3_PATCH)
 215                 type = FM_PATCH_OPL3;
 216         else
 217                 return -EINVAL;
 218
 219         if (count < (int)sizeof(sbi)) {
 220                 snd_printk("FM Error: Patch record too short\n");
 221                 return -EINVAL;
 222         }
 223         if (copy_from_user(&sbi, buf, sizeof(sbi)))
 224                 return -EFAULT;
 225
 226         if (sbi.channel < 0 || sbi.channel >= SBFM_MAXINSTR) {
 227                 snd_printk("FM Error: Invalid instrument number %d\n",
 228                            sbi.channel);
 229                 return -EINVAL;
 230         }
 231
 232         memset(name, 0, sizeof(name));
 233         sprintf(name, "Chan%d", sbi.channel);
 234
 235         err = snd_opl3_load_patch(opl3, sbi.channel, 127, type, name, NULL,
 236                                   sbi.operators);
 237         if (err < 0)
 238                 return err;
 239
 240         return sizeof(sbi);
 241 }
 242
 243 /* ioctl */
 244 static int snd_opl3_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
 245                                   unsigned long ioarg)
 246 {
 247         struct snd_opl3 *opl3;
 248
 249         snd_assert(arg != NULL, return -ENXIO);
 250         opl3 = arg->private_data;
 251         switch (cmd) {
 252                 case SNDCTL_FM_LOAD_INSTR:
 253                         snd_printk("OPL3: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. Fix the program.\n");
 254                         return -EINVAL;
 255
 256                 case SNDCTL_SYNTH_MEMAVL:
 257                         return 0x7fffffff;
 258
 259                 case SNDCTL_FM_4OP_ENABLE:
 260                         // handled automatically by OPL instrument type
 261                         return 0;
 262
 263                 default:
 264                         return -EINVAL;
 265         }
 266         return 0;
 267 }
 268
 269 /* reset device */
 270 static int snd_opl3_reset_seq_oss(struct snd_seq_oss_arg *arg)
 271 {
 272         struct snd_opl3 *opl3;
 273
 274         snd_assert(arg != NULL, return -ENXIO);
 275         opl3 = arg->private_data;
 276
 277         return 0;
 278 }