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 <linux/nospec.h> 26 #include "emux_voice.h" 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 info.mode = array_index_nospec(info.mode, EMUX_MD_END); 70 71 if (info.port < 0) { 72 for (i = 0; i < emu->num_ports; i++) 73 emu->portptrs[i]->ctrls[info.mode] = info.value; 74 } else { 75 if (info.port < emu->num_ports) { 76 info.port = array_index_nospec(info.port, emu->num_ports); 77 emu->portptrs[info.port]->ctrls[info.mode] = info.value; 78 } 79 } 80 return 0; 81 } 82 83 84 /* 85 * ioctl 86 */ 87 static int 88 snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file, 89 unsigned int cmd, unsigned long arg) 90 { 91 struct snd_emux *emu = hw->private_data; 92 93 switch (cmd) { 94 case SNDRV_EMUX_IOCTL_VERSION: 95 return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg); 96 case SNDRV_EMUX_IOCTL_LOAD_PATCH: 97 return snd_emux_hwdep_load_patch(emu, (void __user *)arg); 98 case SNDRV_EMUX_IOCTL_RESET_SAMPLES: 99 snd_soundfont_remove_samples(emu->sflist); 100 break; 101 case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES: 102 snd_soundfont_remove_unlocked(emu->sflist); 103 break; 104 case SNDRV_EMUX_IOCTL_MEM_AVAIL: 105 if (emu->memhdr) { 106 int size = snd_util_mem_avail(emu->memhdr); 107 return put_user(size, (unsigned int __user *)arg); 108 } 109 break; 110 case SNDRV_EMUX_IOCTL_MISC_MODE: 111 return snd_emux_hwdep_misc_mode(emu, (void __user *)arg); 112 } 113 114 return 0; 115 } 116 117 118 /* 119 * register hwdep device 120 */ 121 122 int 123 snd_emux_init_hwdep(struct snd_emux *emu) 124 { 125 struct snd_hwdep *hw; 126 int err; 127 128 if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0) 129 return err; 130 emu->hwdep = hw; 131 strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME); 132 hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE; 133 hw->ops.ioctl = snd_emux_hwdep_ioctl; 134 /* The ioctl parameter types are compatible between 32- and 135 * 64-bit architectures, so use the same function. */ 136 hw->ops.ioctl_compat = snd_emux_hwdep_ioctl; 137 hw->exclusive = 1; 138 hw->private_data = emu; 139 if ((err = snd_card_register(emu->card)) < 0) 140 return err; 141 142 return 0; 143 } 144 145 146 /* 147 * unregister 148 */ 149 void 150 snd_emux_delete_hwdep(struct snd_emux *emu) 151 { 152 if (emu->hwdep) { 153 snd_device_free(emu->card, emu->hwdep); 154 emu->hwdep = NULL; 155 } 156 } 157