sound/synth/emux/emux_hwdep.c

   1 /*
   2  *  Interface for hwdep device
   3  *
   4  *  Copyright (C) 2004 Takashi Iwai <tiwai@suse.de>
   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
  22 #include <sound/core.h>
  23 #include <sound/hwdep.h>
  24 #include <asm/uaccess.h>
  25 #include "emux_voice.h"
  26
  27 /*
  28  * open the hwdep device
  29  */
  30 static int
  31 snd_emux_hwdep_open(struct snd_hwdep *hw, struct file *file)
  32 {
  33         return 0;
  34 }
  35
  36
  37 /*
  38  * close the device
  39  */
  40 static int
  41 snd_emux_hwdep_release(struct snd_hwdep *hw, struct file *file)
  42 {
  43         return 0;
  44 }
  45
  46
  47 #define TMP_CLIENT_ID   0x1001
  48
  49 /*
  50  * load patch
  51  */
  52 static int
  53 snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg)
  54 {
  55         int err;
  56         struct soundfont_patch_info patch;
  57
  58         if (copy_from_user(&patch, arg, sizeof(patch)))
  59                 return -EFAULT;
  60
  61         if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
  62             patch.type <= SNDRV_SFNT_PROBE_DATA) {
  63                 err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID);
  64                 if (err < 0)
  65                         return err;
  66         } else {
  67                 if (emu->ops.load_fx)
  68                         return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch));
  69                 else
  70                         return -EINVAL;
  71         }
  72         return 0;
  73 }
  74
  75 /*
  76  * set misc mode
  77  */
  78 static int
  79 snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg)
  80 {
  81         struct snd_emux_misc_mode info;
  82         int i;
  83
  84         if (copy_from_user(&info, arg, sizeof(info)))
  85                 return -EFAULT;
  86         if (info.mode < 0 || info.mode >= EMUX_MD_END)
  87                 return -EINVAL;
  88
  89         if (info.port < 0) {
  90                 for (i = 0; i < emu->num_ports; i++)
  91                         emu->portptrs[i]->ctrls[info.mode] = info.value;
  92         } else {
  93                 if (info.port < emu->num_ports)
  94                         emu->portptrs[info.port]->ctrls[info.mode] = info.value;
  95         }
  96         return 0;
  97 }
  98
  99
 100 /*
 101  * ioctl
 102  */
 103 static int
 104 snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
 105                      unsigned int cmd, unsigned long arg)
 106 {
 107         struct snd_emux *emu = hw->private_data;
 108
 109         switch (cmd) {
 110         case SNDRV_EMUX_IOCTL_VERSION:
 111                 return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg);
 112         case SNDRV_EMUX_IOCTL_LOAD_PATCH:
 113                 return snd_emux_hwdep_load_patch(emu, (void __user *)arg);
 114         case SNDRV_EMUX_IOCTL_RESET_SAMPLES:
 115                 snd_soundfont_remove_samples(emu->sflist);
 116                 break;
 117         case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES:
 118                 snd_soundfont_remove_unlocked(emu->sflist);
 119                 break;
 120         case SNDRV_EMUX_IOCTL_MEM_AVAIL:
 121                 if (emu->memhdr) {
 122                         int size = snd_util_mem_avail(emu->memhdr);
 123                         return put_user(size, (unsigned int __user *)arg);
 124                 }
 125                 break;
 126         case SNDRV_EMUX_IOCTL_MISC_MODE:
 127                 return snd_emux_hwdep_misc_mode(emu, (void __user *)arg);
 128         }
 129
 130         return 0;
 131 }
 132
 133
 134 /*
 135  * register hwdep device
 136  */
 137
 138 int
 139 snd_emux_init_hwdep(struct snd_emux *emu)
 140 {
 141         struct snd_hwdep *hw;
 142         int err;
 143
 144         if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0)
 145                 return err;
 146         emu->hwdep = hw;
 147         strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
 148         hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
 149         hw->ops.open = snd_emux_hwdep_open;
 150         hw->ops.release = snd_emux_hwdep_release;
 151         hw->ops.ioctl = snd_emux_hwdep_ioctl;
 152         hw->exclusive = 1;
 153         hw->private_data = emu;
 154         if ((err = snd_card_register(emu->card)) < 0)
 155                 return err;
 156
 157         return 0;
 158 }
 159
 160
 161 /*
 162  * unregister
 163  */
 164 void
 165 snd_emux_delete_hwdep(struct snd_emux *emu)
 166 {
 167         if (emu->hwdep) {
 168                 snd_device_free(emu->card, emu->hwdep);
 169                 emu->hwdep = NULL;
 170         }
 171 }