release/src-rt-6.x.4708/linux/linux-2.6.36/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
  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 }