LXR linux/sound/synth/emux/emux

   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 */
  30static int
  31snd_emux_hwdep_open(struct snd_hwdep *hw, struct file *file)
  32{
  33        return 0;
  34}
  35
  36
  37/*
  38 * close the device
  39 */
  40static int
  41snd_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 */
  52static int
  53snd_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 */
  78static int
  79snd_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 */
 103static int
 104snd_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
 138int
 139snd_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 */
 164void
 165snd_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}
 172