release/src-rt-6.x/linux/linux-2.6/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/driver.h>
  23 #include <sound/core.h>
  24 #include <sound/hwdep.h>
  25 #include <asm/uaccess.h>
  26 #include "emux_voice.h"
  27
  28 /*
  29  * open the hwdep device
  30  */
  31 static int
  32 snd_emux_hwdep_open(struct snd_hwdep *hw, struct file *file)
  33 {
  34         return 0;
  35 }
  36
  37
  38 /*
  39  * close the device
  40  */
  41 static int
  42 snd_emux_hwdep_release(struct snd_hwdep *hw, struct file *file)
  43 {
  44         return 0;
  45 }
  46
  47
  48 #define TMP_CLIENT_ID   0x1001
  49
  50 /*
  51  * load patch
  52  */
  53 static int
  54 snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg)
  55 {
  56         int err;
  57         struct soundfont_patch_info patch;
  58
  59         if (copy_from_user(&patch, arg, sizeof(patch)))
  60                 return -EFAULT;
  61
  62         if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
  63             patch.type <= SNDRV_SFNT_PROBE_DATA) {
  64                 err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID);
  65                 if (err < 0)
  66                         return err;
  67         } else {
  68                 if (emu->ops.load_fx)
  69                         return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch));
  70                 else
  71                         return -EINVAL;
  72         }
  73         return 0;
  74 }
  75
  76 /*
  77  * set misc mode
  78  */
  79 static int
  80 snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg)
  81 {
  82         struct snd_emux_misc_mode info;
  83         int i;
  84
  85         if (copy_from_user(&info, arg, sizeof(info)))
  86                 return -EFAULT;
  87         if (info.mode < 0 || info.mode >= EMUX_MD_END)
  88                 return -EINVAL;
  89
  90         if (info.port < 0) {
  91                 for (i = 0; i < emu->num_ports; i++)
  92                         emu->portptrs[i]->ctrls[info.mode] = info.value;
  93         } else {
  94                 if (info.port < emu->num_ports)
  95                         emu->portptrs[info.port]->ctrls[info.mode] = info.value;
  96         }
  97         return 0;
  98 }
  99
 100
 101 /*
 102  * ioctl
 103  */
 104 static int
 105 snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
 106                      unsigned int cmd, unsigned long arg)
 107 {
 108         struct snd_emux *emu = hw->private_data;
 109
 110         switch (cmd) {
 111         case SNDRV_EMUX_IOCTL_VERSION:
 112                 return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg);
 113         case SNDRV_EMUX_IOCTL_LOAD_PATCH:
 114                 return snd_emux_hwdep_load_patch(emu, (void __user *)arg);
 115         case SNDRV_EMUX_IOCTL_RESET_SAMPLES:
 116                 snd_soundfont_remove_samples(emu->sflist);
 117                 break;
 118         case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES:
 119                 snd_soundfont_remove_unlocked(emu->sflist);
 120                 break;
 121         case SNDRV_EMUX_IOCTL_MEM_AVAIL:
 122                 if (emu->memhdr) {
 123                         int size = snd_util_mem_avail(emu->memhdr);
 124                         return put_user(size, (unsigned int __user *)arg);
 125                 }
 126                 break;
 127         case SNDRV_EMUX_IOCTL_MISC_MODE:
 128                 return snd_emux_hwdep_misc_mode(emu, (void __user *)arg);
 129         }
 130
 131         return 0;
 132 }
 133
 134
 135 /*
 136  * register hwdep device
 137  */
 138
 139 int
 140 snd_emux_init_hwdep(struct snd_emux *emu)
 141 {
 142         struct snd_hwdep *hw;
 143         int err;
 144
 145         if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0)
 146                 return err;
 147         emu->hwdep = hw;
 148         strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
 149         hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
 150         hw->ops.open = snd_emux_hwdep_open;
 151         hw->ops.release = snd_emux_hwdep_release;
 152         hw->ops.ioctl = snd_emux_hwdep_ioctl;
 153         hw->exclusive = 1;
 154         hw->private_data = emu;
 155         if ((err = snd_card_register(emu->card)) < 0)
 156                 return err;
 157
 158         return 0;
 159 }
 160
 161
 162 /*
 163  * unregister
 164  */
 165 void
 166 snd_emux_delete_hwdep(struct snd_emux *emu)
 167 {
 168         if (emu->hwdep) {
 169                 snd_device_free(emu->card, emu->hwdep);
 170                 emu->hwdep = NULL;
 171         }
 172 }