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