Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Hardware dependent layer |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/major.h> |
| 23 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/slab.h> |
| 25 | #include <linux/time.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 26 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <sound/core.h> |
| 28 | #include <sound/control.h> |
| 29 | #include <sound/minors.h> |
| 30 | #include <sound/hwdep.h> |
| 31 | #include <sound/info.h> |
| 32 | |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 33 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | MODULE_DESCRIPTION("Hardware dependent layer"); |
| 35 | MODULE_LICENSE("GPL"); |
| 36 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 37 | static LIST_HEAD(snd_hwdep_devices); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 38 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 40 | static int snd_hwdep_free(struct snd_hwdep *hwdep); |
| 41 | static int snd_hwdep_dev_free(struct snd_device *device); |
| 42 | static int snd_hwdep_dev_register(struct snd_device *device); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 43 | static int snd_hwdep_dev_disconnect(struct snd_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 46 | static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device) |
| 47 | { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 48 | struct snd_hwdep *hwdep; |
| 49 | |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 50 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 51 | if (hwdep->card == card && hwdep->device == device) |
| 52 | return hwdep; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 53 | return NULL; |
| 54 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig) |
| 57 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 58 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | if (hw->ops.llseek) |
| 60 | return hw->ops.llseek(hw, file, offset, orig); |
| 61 | return -ENXIO; |
| 62 | } |
| 63 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 64 | static ssize_t snd_hwdep_read(struct file * file, char __user *buf, |
| 65 | size_t count, loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 67 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | if (hw->ops.read) |
| 69 | return hw->ops.read(hw, buf, count, offset); |
| 70 | return -ENXIO; |
| 71 | } |
| 72 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 73 | static ssize_t snd_hwdep_write(struct file * file, const char __user *buf, |
| 74 | size_t count, loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 76 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | if (hw->ops.write) |
| 78 | return hw->ops.write(hw, buf, count, offset); |
| 79 | return -ENXIO; |
| 80 | } |
| 81 | |
| 82 | static int snd_hwdep_open(struct inode *inode, struct file * file) |
| 83 | { |
| 84 | int major = imajor(inode); |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 85 | struct snd_hwdep *hw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | int err; |
| 87 | wait_queue_t wait; |
| 88 | |
Clemens Ladisch | f190286 | 2005-10-24 17:05:03 +0200 | [diff] [blame] | 89 | if (major == snd_major) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 90 | hw = snd_lookup_minor_data(iminor(inode), |
| 91 | SNDRV_DEVICE_TYPE_HWDEP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | #ifdef CONFIG_SND_OSSEMUL |
Clemens Ladisch | f190286 | 2005-10-24 17:05:03 +0200 | [diff] [blame] | 93 | } else if (major == SOUND_MAJOR) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 94 | hw = snd_lookup_oss_minor_data(iminor(inode), |
| 95 | SNDRV_OSS_DEVICE_TYPE_DMFM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #endif |
Clemens Ladisch | f190286 | 2005-10-24 17:05:03 +0200 | [diff] [blame] | 97 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | if (hw == NULL) |
| 100 | return -ENODEV; |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | if (!try_module_get(hw->card->module)) |
| 103 | return -EFAULT; |
| 104 | |
| 105 | init_waitqueue_entry(&wait, current); |
| 106 | add_wait_queue(&hw->open_wait, &wait); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 107 | mutex_lock(&hw->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | while (1) { |
| 109 | if (hw->exclusive && hw->used > 0) { |
| 110 | err = -EBUSY; |
| 111 | break; |
| 112 | } |
Takashi Iwai | 345d0b1 | 2009-02-05 09:10:20 +0100 | [diff] [blame] | 113 | if (!hw->ops.open) { |
| 114 | err = 0; |
| 115 | break; |
| 116 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | err = hw->ops.open(hw, file); |
| 118 | if (err >= 0) |
| 119 | break; |
| 120 | if (err == -EAGAIN) { |
| 121 | if (file->f_flags & O_NONBLOCK) { |
| 122 | err = -EBUSY; |
| 123 | break; |
| 124 | } |
| 125 | } else |
| 126 | break; |
| 127 | set_current_state(TASK_INTERRUPTIBLE); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 128 | mutex_unlock(&hw->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | schedule(); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 130 | mutex_lock(&hw->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | if (signal_pending(current)) { |
| 132 | err = -ERESTARTSYS; |
| 133 | break; |
| 134 | } |
| 135 | } |
| 136 | remove_wait_queue(&hw->open_wait, &wait); |
| 137 | if (err >= 0) { |
| 138 | err = snd_card_file_add(hw->card, file); |
| 139 | if (err >= 0) { |
| 140 | file->private_data = hw; |
| 141 | hw->used++; |
| 142 | } else { |
| 143 | if (hw->ops.release) |
| 144 | hw->ops.release(hw, file); |
| 145 | } |
| 146 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 147 | mutex_unlock(&hw->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | if (err < 0) |
| 149 | module_put(hw->card->module); |
| 150 | return err; |
| 151 | } |
| 152 | |
| 153 | static int snd_hwdep_release(struct inode *inode, struct file * file) |
| 154 | { |
Takashi Iwai | 345d0b1 | 2009-02-05 09:10:20 +0100 | [diff] [blame] | 155 | int err = 0; |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 156 | struct snd_hwdep *hw = file->private_data; |
Florin Malita | 104326f | 2006-09-29 12:55:25 +0200 | [diff] [blame] | 157 | struct module *mod = hw->card->module; |
Karsten Wiese | 8fa58af | 2007-01-31 10:05:30 +0100 | [diff] [blame] | 158 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 159 | mutex_lock(&hw->open_mutex); |
Karsten Wiese | 8fa58af | 2007-01-31 10:05:30 +0100 | [diff] [blame] | 160 | if (hw->ops.release) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | err = hw->ops.release(hw, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | if (hw->used > 0) |
| 163 | hw->used--; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 164 | mutex_unlock(&hw->open_mutex); |
Karsten Wiese | 8fa58af | 2007-01-31 10:05:30 +0100 | [diff] [blame] | 165 | wake_up(&hw->open_wait); |
| 166 | |
| 167 | snd_card_file_remove(hw->card, file); |
Florin Malita | 104326f | 2006-09-29 12:55:25 +0200 | [diff] [blame] | 168 | module_put(mod); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | return err; |
| 170 | } |
| 171 | |
| 172 | static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait) |
| 173 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 174 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | if (hw->ops.poll) |
| 176 | return hw->ops.poll(hw, file, wait); |
| 177 | return 0; |
| 178 | } |
| 179 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 180 | static int snd_hwdep_info(struct snd_hwdep *hw, |
| 181 | struct snd_hwdep_info __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 183 | struct snd_hwdep_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | memset(&info, 0, sizeof(info)); |
| 186 | info.card = hw->card->number; |
| 187 | strlcpy(info.id, hw->id, sizeof(info.id)); |
| 188 | strlcpy(info.name, hw->name, sizeof(info.name)); |
| 189 | info.iface = hw->iface; |
| 190 | if (copy_to_user(_info, &info, sizeof(info))) |
| 191 | return -EFAULT; |
| 192 | return 0; |
| 193 | } |
| 194 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 195 | static int snd_hwdep_dsp_status(struct snd_hwdep *hw, |
| 196 | struct snd_hwdep_dsp_status __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 198 | struct snd_hwdep_dsp_status info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | int err; |
| 200 | |
| 201 | if (! hw->ops.dsp_status) |
| 202 | return -ENXIO; |
| 203 | memset(&info, 0, sizeof(info)); |
| 204 | info.dsp_loaded = hw->dsp_loaded; |
| 205 | if ((err = hw->ops.dsp_status(hw, &info)) < 0) |
| 206 | return err; |
| 207 | if (copy_to_user(_info, &info, sizeof(info))) |
| 208 | return -EFAULT; |
| 209 | return 0; |
| 210 | } |
| 211 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 212 | static int snd_hwdep_dsp_load(struct snd_hwdep *hw, |
| 213 | struct snd_hwdep_dsp_image __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 215 | struct snd_hwdep_dsp_image info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | int err; |
| 217 | |
| 218 | if (! hw->ops.dsp_load) |
| 219 | return -ENXIO; |
| 220 | memset(&info, 0, sizeof(info)); |
| 221 | if (copy_from_user(&info, _info, sizeof(info))) |
| 222 | return -EFAULT; |
| 223 | /* check whether the dsp was already loaded */ |
| 224 | if (hw->dsp_loaded & (1 << info.index)) |
| 225 | return -EBUSY; |
| 226 | if (!access_ok(VERIFY_READ, info.image, info.length)) |
| 227 | return -EFAULT; |
| 228 | err = hw->ops.dsp_load(hw, &info); |
| 229 | if (err < 0) |
| 230 | return err; |
| 231 | hw->dsp_loaded |= (1 << info.index); |
| 232 | return 0; |
| 233 | } |
| 234 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 235 | static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, |
| 236 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 238 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | void __user *argp = (void __user *)arg; |
| 240 | switch (cmd) { |
| 241 | case SNDRV_HWDEP_IOCTL_PVERSION: |
| 242 | return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp); |
| 243 | case SNDRV_HWDEP_IOCTL_INFO: |
| 244 | return snd_hwdep_info(hw, argp); |
| 245 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: |
| 246 | return snd_hwdep_dsp_status(hw, argp); |
| 247 | case SNDRV_HWDEP_IOCTL_DSP_LOAD: |
| 248 | return snd_hwdep_dsp_load(hw, argp); |
| 249 | } |
| 250 | if (hw->ops.ioctl) |
| 251 | return hw->ops.ioctl(hw, file, cmd, arg); |
| 252 | return -ENOTTY; |
| 253 | } |
| 254 | |
| 255 | static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma) |
| 256 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 257 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | if (hw->ops.mmap) |
| 259 | return hw->ops.mmap(hw, file, vma); |
| 260 | return -ENXIO; |
| 261 | } |
| 262 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 263 | static int snd_hwdep_control_ioctl(struct snd_card *card, |
| 264 | struct snd_ctl_file * control, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | unsigned int cmd, unsigned long arg) |
| 266 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | switch (cmd) { |
| 268 | case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE: |
| 269 | { |
| 270 | int device; |
| 271 | |
| 272 | if (get_user(device, (int __user *)arg)) |
| 273 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 274 | mutex_lock(®ister_mutex); |
Dan Carpenter | f7b2bb8 | 2011-10-28 09:46:01 +0300 | [diff] [blame^] | 275 | |
| 276 | if (device < 0) |
| 277 | device = 0; |
| 278 | else if (device < SNDRV_MINOR_HWDEPS) |
| 279 | device++; |
| 280 | else |
| 281 | device = SNDRV_MINOR_HWDEPS; |
| 282 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | while (device < SNDRV_MINOR_HWDEPS) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 284 | if (snd_hwdep_search(card, device)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | break; |
| 286 | device++; |
| 287 | } |
| 288 | if (device >= SNDRV_MINOR_HWDEPS) |
| 289 | device = -1; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 290 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | if (put_user(device, (int __user *)arg)) |
| 292 | return -EFAULT; |
| 293 | return 0; |
| 294 | } |
| 295 | case SNDRV_CTL_IOCTL_HWDEP_INFO: |
| 296 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 297 | struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 298 | int device, err; |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 299 | struct snd_hwdep *hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | if (get_user(device, &info->device)) |
| 302 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 303 | mutex_lock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 304 | hwdep = snd_hwdep_search(card, device); |
| 305 | if (hwdep) |
| 306 | err = snd_hwdep_info(hwdep, info); |
| 307 | else |
| 308 | err = -ENXIO; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 309 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 310 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
| 312 | } |
| 313 | return -ENOIOCTLCMD; |
| 314 | } |
| 315 | |
| 316 | #ifdef CONFIG_COMPAT |
| 317 | #include "hwdep_compat.c" |
| 318 | #else |
| 319 | #define snd_hwdep_ioctl_compat NULL |
| 320 | #endif |
| 321 | |
| 322 | /* |
| 323 | |
| 324 | */ |
| 325 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 326 | static const struct file_operations snd_hwdep_f_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | { |
| 328 | .owner = THIS_MODULE, |
| 329 | .llseek = snd_hwdep_llseek, |
| 330 | .read = snd_hwdep_read, |
| 331 | .write = snd_hwdep_write, |
| 332 | .open = snd_hwdep_open, |
| 333 | .release = snd_hwdep_release, |
| 334 | .poll = snd_hwdep_poll, |
| 335 | .unlocked_ioctl = snd_hwdep_ioctl, |
| 336 | .compat_ioctl = snd_hwdep_ioctl_compat, |
| 337 | .mmap = snd_hwdep_mmap, |
| 338 | }; |
| 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | /** |
| 341 | * snd_hwdep_new - create a new hwdep instance |
| 342 | * @card: the card instance |
| 343 | * @id: the id string |
| 344 | * @device: the device index (zero-based) |
| 345 | * @rhwdep: the pointer to store the new hwdep instance |
| 346 | * |
| 347 | * Creates a new hwdep instance with the given index on the card. |
| 348 | * The callbacks (hwdep->ops) must be set on the returned instance |
| 349 | * after this call manually by the caller. |
| 350 | * |
| 351 | * Returns zero if successful, or a negative error code on failure. |
| 352 | */ |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 353 | int snd_hwdep_new(struct snd_card *card, char *id, int device, |
| 354 | struct snd_hwdep **rhwdep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 356 | struct snd_hwdep *hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | int err; |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 358 | static struct snd_device_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | .dev_free = snd_hwdep_dev_free, |
| 360 | .dev_register = snd_hwdep_dev_register, |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 361 | .dev_disconnect = snd_hwdep_dev_disconnect, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | }; |
| 363 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 364 | if (snd_BUG_ON(!card)) |
| 365 | return -ENXIO; |
| 366 | if (rhwdep) |
| 367 | *rhwdep = NULL; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 368 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 369 | if (hwdep == NULL) { |
| 370 | snd_printk(KERN_ERR "hwdep: cannot allocate\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return -ENOMEM; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 372 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | hwdep->card = card; |
| 374 | hwdep->device = device; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 375 | if (id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | #ifdef CONFIG_SND_OSSEMUL |
| 378 | hwdep->oss_type = -1; |
| 379 | #endif |
| 380 | if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) { |
| 381 | snd_hwdep_free(hwdep); |
| 382 | return err; |
| 383 | } |
| 384 | init_waitqueue_head(&hwdep->open_wait); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 385 | mutex_init(&hwdep->open_mutex); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 386 | if (rhwdep) |
| 387 | *rhwdep = hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | return 0; |
| 389 | } |
| 390 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 391 | static int snd_hwdep_free(struct snd_hwdep *hwdep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 393 | if (!hwdep) |
| 394 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | if (hwdep->private_free) |
| 396 | hwdep->private_free(hwdep); |
| 397 | kfree(hwdep); |
| 398 | return 0; |
| 399 | } |
| 400 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 401 | static int snd_hwdep_dev_free(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 403 | struct snd_hwdep *hwdep = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | return snd_hwdep_free(hwdep); |
| 405 | } |
| 406 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 407 | static int snd_hwdep_dev_register(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 409 | struct snd_hwdep *hwdep = device->device_data; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 410 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | char name[32]; |
| 412 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 413 | mutex_lock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 414 | if (snd_hwdep_search(hwdep->card, hwdep->device)) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 415 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | return -EBUSY; |
| 417 | } |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 418 | list_add_tail(&hwdep->list, &snd_hwdep_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device); |
| 420 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, |
| 421 | hwdep->card, hwdep->device, |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 422 | &snd_hwdep_f_ops, hwdep, name)) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n", |
| 424 | hwdep->card->number, hwdep->device); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 425 | list_del(&hwdep->list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 426 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | return err; |
| 428 | } |
| 429 | #ifdef CONFIG_SND_OSSEMUL |
| 430 | hwdep->ossreg = 0; |
| 431 | if (hwdep->oss_type >= 0) { |
| 432 | if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) { |
| 433 | snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n"); |
| 434 | } else { |
| 435 | if (snd_register_oss_device(hwdep->oss_type, |
| 436 | hwdep->card, hwdep->device, |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 437 | &snd_hwdep_f_ops, hwdep, |
Clemens Ladisch | 2af677f | 2005-11-20 14:03:48 +0100 | [diff] [blame] | 438 | hwdep->oss_dev) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n", |
| 440 | hwdep->card->number, hwdep->device); |
| 441 | } else |
| 442 | hwdep->ossreg = 1; |
| 443 | } |
| 444 | } |
| 445 | #endif |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 446 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | return 0; |
| 448 | } |
| 449 | |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 450 | static int snd_hwdep_dev_disconnect(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 452 | struct snd_hwdep *hwdep = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 454 | if (snd_BUG_ON(!hwdep)) |
| 455 | return -ENXIO; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 456 | mutex_lock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 457 | if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 458 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | return -EINVAL; |
| 460 | } |
| 461 | #ifdef CONFIG_SND_OSSEMUL |
| 462 | if (hwdep->ossreg) |
| 463 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); |
| 464 | #endif |
| 465 | snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 466 | list_del_init(&hwdep->list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 467 | mutex_unlock(®ister_mutex); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 468 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 471 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | /* |
| 473 | * Info interface |
| 474 | */ |
| 475 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 476 | static void snd_hwdep_proc_read(struct snd_info_entry *entry, |
| 477 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 479 | struct snd_hwdep *hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 481 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 482 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 484 | hwdep->card->number, hwdep->device, hwdep->name); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 485 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 488 | static struct snd_info_entry *snd_hwdep_proc_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 490 | static void __init snd_hwdep_proc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 492 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | entry->c.text.read = snd_hwdep_proc_read; |
| 496 | if (snd_info_register(entry) < 0) { |
| 497 | snd_info_free_entry(entry); |
| 498 | entry = NULL; |
| 499 | } |
| 500 | } |
| 501 | snd_hwdep_proc_entry = entry; |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | static void __exit snd_hwdep_proc_done(void) |
| 505 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 506 | snd_info_free_entry(snd_hwdep_proc_entry); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 507 | } |
| 508 | #else /* !CONFIG_PROC_FS */ |
| 509 | #define snd_hwdep_proc_init() |
| 510 | #define snd_hwdep_proc_done() |
| 511 | #endif /* CONFIG_PROC_FS */ |
| 512 | |
| 513 | |
| 514 | /* |
| 515 | * ENTRY functions |
| 516 | */ |
| 517 | |
| 518 | static int __init alsa_hwdep_init(void) |
| 519 | { |
| 520 | snd_hwdep_proc_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
| 522 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static void __exit alsa_hwdep_exit(void) |
| 527 | { |
| 528 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); |
| 529 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 530 | snd_hwdep_proc_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | module_init(alsa_hwdep_init) |
| 534 | module_exit(alsa_hwdep_exit) |
| 535 | |
| 536 | EXPORT_SYMBOL(snd_hwdep_new); |