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.key == GUS_PATCH) 43 return snd_soundfont_load_guspatch(emu->sflist, arg, 44 patch.len + sizeof(patch), 45 TMP_CLIENT_ID); 46 47 if (patch.type >= SNDRV_SFNT_LOAD_INFO && 48 patch.type <= SNDRV_SFNT_PROBE_DATA) { 49 err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID); 50 if (err < 0) 51 return err; 52 } else { 53 if (emu->ops.load_fx) 54 return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch)); 55 else 56 return -EINVAL; 57 } 58 return 0; 59 } 60 61 /* 62 * set misc mode 63 */ 64 static int 65 snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg) 66 { 67 struct snd_emux_misc_mode info; 68 int i; 69 70 if (copy_from_user(&info, arg, sizeof(info))) 71 return -EFAULT; 72 if (info.mode < 0 || info.mode >= EMUX_MD_END) 73 return -EINVAL; 74 info.mode = array_index_nospec(info.mode, EMUX_MD_END); 75 76 if (info.port < 0) { 77 for (i = 0; i < emu->num_ports; i++) 78 emu->portptrs[i]->ctrls[info.mode] = info.value; 79 } else { 80 if (info.port < emu->num_ports) { 81 info.port = array_index_nospec(info.port, emu->num_ports); 82 emu->portptrs[info.port]->ctrls[info.mode] = info.value; 83 } 84 } 85 return 0; 86 } 87 88 89 /* 90 * ioctl 91 */ 92 static int 93 snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file, 94 unsigned int cmd, unsigned long arg) 95 { 96 struct snd_emux *emu = hw->private_data; 97 98 switch (cmd) { 99 case SNDRV_EMUX_IOCTL_VERSION: 100 return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg); 101 case SNDRV_EMUX_IOCTL_LOAD_PATCH: 102 return snd_emux_hwdep_load_patch(emu, (void __user *)arg); 103 case SNDRV_EMUX_IOCTL_RESET_SAMPLES: 104 snd_soundfont_remove_samples(emu->sflist); 105 break; 106 case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES: 107 snd_soundfont_remove_unlocked(emu->sflist); 108 break; 109 case SNDRV_EMUX_IOCTL_MEM_AVAIL: 110 if (emu->memhdr) { 111 int size = snd_util_mem_avail(emu->memhdr); 112 return put_user(size, (unsigned int __user *)arg); 113 } 114 break; 115 case SNDRV_EMUX_IOCTL_MISC_MODE: 116 return snd_emux_hwdep_misc_mode(emu, (void __user *)arg); 117 } 118 119 return 0; 120 } 121 122 123 /* 124 * register hwdep device 125 */ 126 127 int 128 snd_emux_init_hwdep(struct snd_emux *emu) 129 { 130 struct snd_hwdep *hw; 131 int err; 132 133 if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0) 134 return err; 135 emu->hwdep = hw; 136 strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME); 137 hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE; 138 hw->ops.ioctl = snd_emux_hwdep_ioctl; 139 /* The ioctl parameter types are compatible between 32- and 140 * 64-bit architectures, so use the same function. */ 141 hw->ops.ioctl_compat = snd_emux_hwdep_ioctl; 142 hw->exclusive = 1; 143 hw->private_data = emu; 144 if ((err = snd_card_register(emu->card)) < 0) 145 return err; 146 147 return 0; 148 } 149 150 151 /* 152 * unregister 153 */ 154 void 155 snd_emux_delete_hwdep(struct snd_emux *emu) 156 { 157 if (emu->hwdep) { 158 snd_device_free(emu->card, emu->hwdep); 159 emu->hwdep = NULL; 160 } 161 } 162