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> |
Paul Gortmaker | da155d5 | 2011-07-15 12:38:28 -0400 | [diff] [blame] | 27 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <sound/core.h> |
| 29 | #include <sound/control.h> |
| 30 | #include <sound/minors.h> |
| 31 | #include <sound/hwdep.h> |
| 32 | #include <sound/info.h> |
| 33 | |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 34 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | MODULE_DESCRIPTION("Hardware dependent layer"); |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 38 | static LIST_HEAD(snd_hwdep_devices); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 39 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 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 | |
Takashi Iwai | a0830db | 2012-10-16 13:05:59 +0200 | [diff] [blame] | 102 | if (!try_module_get(hw->card->module)) { |
| 103 | snd_card_unref(hw->card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | return -EFAULT; |
Takashi Iwai | a0830db | 2012-10-16 13:05:59 +0200 | [diff] [blame] | 105 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | init_waitqueue_entry(&wait, current); |
| 108 | add_wait_queue(&hw->open_wait, &wait); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 109 | mutex_lock(&hw->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | while (1) { |
| 111 | if (hw->exclusive && hw->used > 0) { |
| 112 | err = -EBUSY; |
| 113 | break; |
| 114 | } |
Takashi Iwai | 345d0b1 | 2009-02-05 09:10:20 +0100 | [diff] [blame] | 115 | if (!hw->ops.open) { |
| 116 | err = 0; |
| 117 | break; |
| 118 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | err = hw->ops.open(hw, file); |
| 120 | if (err >= 0) |
| 121 | break; |
| 122 | if (err == -EAGAIN) { |
| 123 | if (file->f_flags & O_NONBLOCK) { |
| 124 | err = -EBUSY; |
| 125 | break; |
| 126 | } |
| 127 | } else |
| 128 | break; |
| 129 | set_current_state(TASK_INTERRUPTIBLE); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 130 | mutex_unlock(&hw->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | schedule(); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 132 | mutex_lock(&hw->open_mutex); |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 133 | if (hw->card->shutdown) { |
| 134 | err = -ENODEV; |
| 135 | break; |
| 136 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | if (signal_pending(current)) { |
| 138 | err = -ERESTARTSYS; |
| 139 | break; |
| 140 | } |
| 141 | } |
| 142 | remove_wait_queue(&hw->open_wait, &wait); |
| 143 | if (err >= 0) { |
| 144 | err = snd_card_file_add(hw->card, file); |
| 145 | if (err >= 0) { |
| 146 | file->private_data = hw; |
| 147 | hw->used++; |
| 148 | } else { |
| 149 | if (hw->ops.release) |
| 150 | hw->ops.release(hw, file); |
| 151 | } |
| 152 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 153 | mutex_unlock(&hw->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | if (err < 0) |
| 155 | module_put(hw->card->module); |
Takashi Iwai | a0830db | 2012-10-16 13:05:59 +0200 | [diff] [blame] | 156 | snd_card_unref(hw->card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return err; |
| 158 | } |
| 159 | |
| 160 | static int snd_hwdep_release(struct inode *inode, struct file * file) |
| 161 | { |
Takashi Iwai | 345d0b1 | 2009-02-05 09:10:20 +0100 | [diff] [blame] | 162 | int err = 0; |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 163 | struct snd_hwdep *hw = file->private_data; |
Florin Malita | 104326f | 2006-09-29 12:55:25 +0200 | [diff] [blame] | 164 | struct module *mod = hw->card->module; |
Karsten Wiese | 8fa58af | 2007-01-31 10:05:30 +0100 | [diff] [blame] | 165 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 166 | mutex_lock(&hw->open_mutex); |
Karsten Wiese | 8fa58af | 2007-01-31 10:05:30 +0100 | [diff] [blame] | 167 | if (hw->ops.release) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | err = hw->ops.release(hw, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (hw->used > 0) |
| 170 | hw->used--; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 171 | mutex_unlock(&hw->open_mutex); |
Karsten Wiese | 8fa58af | 2007-01-31 10:05:30 +0100 | [diff] [blame] | 172 | wake_up(&hw->open_wait); |
| 173 | |
| 174 | snd_card_file_remove(hw->card, file); |
Florin Malita | 104326f | 2006-09-29 12:55:25 +0200 | [diff] [blame] | 175 | module_put(mod); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | return err; |
| 177 | } |
| 178 | |
| 179 | static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait) |
| 180 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 181 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | if (hw->ops.poll) |
| 183 | return hw->ops.poll(hw, file, wait); |
| 184 | return 0; |
| 185 | } |
| 186 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 187 | static int snd_hwdep_info(struct snd_hwdep *hw, |
| 188 | struct snd_hwdep_info __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 190 | struct snd_hwdep_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | memset(&info, 0, sizeof(info)); |
| 193 | info.card = hw->card->number; |
| 194 | strlcpy(info.id, hw->id, sizeof(info.id)); |
| 195 | strlcpy(info.name, hw->name, sizeof(info.name)); |
| 196 | info.iface = hw->iface; |
| 197 | if (copy_to_user(_info, &info, sizeof(info))) |
| 198 | return -EFAULT; |
| 199 | return 0; |
| 200 | } |
| 201 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 202 | static int snd_hwdep_dsp_status(struct snd_hwdep *hw, |
| 203 | struct snd_hwdep_dsp_status __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 205 | struct snd_hwdep_dsp_status info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | int err; |
| 207 | |
| 208 | if (! hw->ops.dsp_status) |
| 209 | return -ENXIO; |
| 210 | memset(&info, 0, sizeof(info)); |
| 211 | info.dsp_loaded = hw->dsp_loaded; |
| 212 | if ((err = hw->ops.dsp_status(hw, &info)) < 0) |
| 213 | return err; |
| 214 | if (copy_to_user(_info, &info, sizeof(info))) |
| 215 | return -EFAULT; |
| 216 | return 0; |
| 217 | } |
| 218 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 219 | static int snd_hwdep_dsp_load(struct snd_hwdep *hw, |
| 220 | struct snd_hwdep_dsp_image __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 222 | struct snd_hwdep_dsp_image info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | int err; |
| 224 | |
| 225 | if (! hw->ops.dsp_load) |
| 226 | return -ENXIO; |
| 227 | memset(&info, 0, sizeof(info)); |
| 228 | if (copy_from_user(&info, _info, sizeof(info))) |
| 229 | return -EFAULT; |
| 230 | /* check whether the dsp was already loaded */ |
| 231 | if (hw->dsp_loaded & (1 << info.index)) |
| 232 | return -EBUSY; |
| 233 | if (!access_ok(VERIFY_READ, info.image, info.length)) |
| 234 | return -EFAULT; |
| 235 | err = hw->ops.dsp_load(hw, &info); |
| 236 | if (err < 0) |
| 237 | return err; |
| 238 | hw->dsp_loaded |= (1 << info.index); |
| 239 | return 0; |
| 240 | } |
| 241 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 242 | static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, |
| 243 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 245 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | void __user *argp = (void __user *)arg; |
| 247 | switch (cmd) { |
| 248 | case SNDRV_HWDEP_IOCTL_PVERSION: |
| 249 | return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp); |
| 250 | case SNDRV_HWDEP_IOCTL_INFO: |
| 251 | return snd_hwdep_info(hw, argp); |
| 252 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: |
| 253 | return snd_hwdep_dsp_status(hw, argp); |
| 254 | case SNDRV_HWDEP_IOCTL_DSP_LOAD: |
| 255 | return snd_hwdep_dsp_load(hw, argp); |
| 256 | } |
| 257 | if (hw->ops.ioctl) |
| 258 | return hw->ops.ioctl(hw, file, cmd, arg); |
| 259 | return -ENOTTY; |
| 260 | } |
| 261 | |
| 262 | static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma) |
| 263 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 264 | struct snd_hwdep *hw = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | if (hw->ops.mmap) |
| 266 | return hw->ops.mmap(hw, file, vma); |
| 267 | return -ENXIO; |
| 268 | } |
| 269 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 270 | static int snd_hwdep_control_ioctl(struct snd_card *card, |
| 271 | struct snd_ctl_file * control, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | unsigned int cmd, unsigned long arg) |
| 273 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | switch (cmd) { |
| 275 | case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE: |
| 276 | { |
| 277 | int device; |
| 278 | |
| 279 | if (get_user(device, (int __user *)arg)) |
| 280 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 281 | mutex_lock(®ister_mutex); |
Dan Carpenter | f7b2bb8 | 2011-10-28 09:46:01 +0300 | [diff] [blame] | 282 | |
| 283 | if (device < 0) |
| 284 | device = 0; |
| 285 | else if (device < SNDRV_MINOR_HWDEPS) |
| 286 | device++; |
| 287 | else |
| 288 | device = SNDRV_MINOR_HWDEPS; |
| 289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | while (device < SNDRV_MINOR_HWDEPS) { |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 291 | if (snd_hwdep_search(card, device)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | break; |
| 293 | device++; |
| 294 | } |
| 295 | if (device >= SNDRV_MINOR_HWDEPS) |
| 296 | device = -1; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 297 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | if (put_user(device, (int __user *)arg)) |
| 299 | return -EFAULT; |
| 300 | return 0; |
| 301 | } |
| 302 | case SNDRV_CTL_IOCTL_HWDEP_INFO: |
| 303 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 304 | struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 305 | int device, err; |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 306 | struct snd_hwdep *hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | if (get_user(device, &info->device)) |
| 309 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 310 | mutex_lock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 311 | hwdep = snd_hwdep_search(card, device); |
| 312 | if (hwdep) |
| 313 | err = snd_hwdep_info(hwdep, info); |
| 314 | else |
| 315 | err = -ENXIO; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 316 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 317 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
| 319 | } |
| 320 | return -ENOIOCTLCMD; |
| 321 | } |
| 322 | |
| 323 | #ifdef CONFIG_COMPAT |
| 324 | #include "hwdep_compat.c" |
| 325 | #else |
| 326 | #define snd_hwdep_ioctl_compat NULL |
| 327 | #endif |
| 328 | |
| 329 | /* |
| 330 | |
| 331 | */ |
| 332 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 333 | static const struct file_operations snd_hwdep_f_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
| 335 | .owner = THIS_MODULE, |
| 336 | .llseek = snd_hwdep_llseek, |
| 337 | .read = snd_hwdep_read, |
| 338 | .write = snd_hwdep_write, |
| 339 | .open = snd_hwdep_open, |
| 340 | .release = snd_hwdep_release, |
| 341 | .poll = snd_hwdep_poll, |
| 342 | .unlocked_ioctl = snd_hwdep_ioctl, |
| 343 | .compat_ioctl = snd_hwdep_ioctl_compat, |
| 344 | .mmap = snd_hwdep_mmap, |
| 345 | }; |
| 346 | |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 347 | static void release_hwdep_device(struct device *dev) |
| 348 | { |
| 349 | kfree(container_of(dev, struct snd_hwdep, dev)); |
| 350 | } |
| 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | /** |
| 353 | * snd_hwdep_new - create a new hwdep instance |
| 354 | * @card: the card instance |
| 355 | * @id: the id string |
| 356 | * @device: the device index (zero-based) |
| 357 | * @rhwdep: the pointer to store the new hwdep instance |
| 358 | * |
| 359 | * Creates a new hwdep instance with the given index on the card. |
| 360 | * The callbacks (hwdep->ops) must be set on the returned instance |
| 361 | * after this call manually by the caller. |
| 362 | * |
Yacine Belkadi | eb7c06e | 2013-03-11 22:05:14 +0100 | [diff] [blame] | 363 | * Return: Zero if successful, or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | */ |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 365 | int snd_hwdep_new(struct snd_card *card, char *id, int device, |
| 366 | struct snd_hwdep **rhwdep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 368 | struct snd_hwdep *hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | int err; |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 370 | static struct snd_device_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | .dev_free = snd_hwdep_dev_free, |
| 372 | .dev_register = snd_hwdep_dev_register, |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 373 | .dev_disconnect = snd_hwdep_dev_disconnect, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | }; |
| 375 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 376 | if (snd_BUG_ON(!card)) |
| 377 | return -ENXIO; |
| 378 | if (rhwdep) |
| 379 | *rhwdep = NULL; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 380 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
Takashi Iwai | ec0e993 | 2015-03-10 15:42:14 +0100 | [diff] [blame] | 381 | if (!hwdep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | return -ENOMEM; |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 383 | |
| 384 | init_waitqueue_head(&hwdep->open_wait); |
| 385 | mutex_init(&hwdep->open_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | hwdep->card = card; |
| 387 | hwdep->device = device; |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 388 | if (id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 390 | |
| 391 | snd_device_initialize(&hwdep->dev, card); |
| 392 | hwdep->dev.release = release_hwdep_device; |
| 393 | dev_set_name(&hwdep->dev, "hwC%iD%i", card->number, device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | #ifdef CONFIG_SND_OSSEMUL |
| 395 | hwdep->oss_type = -1; |
| 396 | #endif |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 397 | |
| 398 | err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops); |
| 399 | if (err < 0) { |
| 400 | put_device(&hwdep->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return err; |
| 402 | } |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 403 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 404 | if (rhwdep) |
| 405 | *rhwdep = hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | return 0; |
| 407 | } |
Takashi Iwai | 6776a5d | 2014-02-27 16:00:17 +0100 | [diff] [blame] | 408 | EXPORT_SYMBOL(snd_hwdep_new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 410 | static int snd_hwdep_dev_free(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 412 | struct snd_hwdep *hwdep = device->device_data; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 413 | if (!hwdep) |
| 414 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | if (hwdep->private_free) |
| 416 | hwdep->private_free(hwdep); |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 417 | put_device(&hwdep->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return 0; |
| 419 | } |
| 420 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 421 | static int snd_hwdep_dev_register(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 423 | struct snd_hwdep *hwdep = device->device_data; |
Takashi Iwai | 2ebef69 | 2014-02-04 18:21:54 +0100 | [diff] [blame] | 424 | struct snd_card *card = hwdep->card; |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 425 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 427 | mutex_lock(®ister_mutex); |
Takashi Iwai | 2ebef69 | 2014-02-04 18:21:54 +0100 | [diff] [blame] | 428 | if (snd_hwdep_search(card, hwdep->device)) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 429 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | return -EBUSY; |
| 431 | } |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 432 | list_add_tail(&hwdep->list, &snd_hwdep_devices); |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 433 | err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, |
| 434 | hwdep->card, hwdep->device, |
| 435 | &snd_hwdep_f_ops, hwdep, &hwdep->dev); |
Takashi Iwai | 71e2e1c | 2014-02-25 08:05:21 +0100 | [diff] [blame] | 436 | if (err < 0) { |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 437 | dev_err(&hwdep->dev, "unable to register\n"); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 438 | list_del(&hwdep->list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 439 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | return err; |
| 441 | } |
Takashi Iwai | caa751b | 2014-02-25 08:30:50 +0100 | [diff] [blame] | 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | #ifdef CONFIG_SND_OSSEMUL |
| 444 | hwdep->ossreg = 0; |
| 445 | if (hwdep->oss_type >= 0) { |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 446 | if (hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM && |
| 447 | hwdep->device) |
| 448 | dev_warn(&hwdep->dev, |
Takashi Iwai | 2ebef69 | 2014-02-04 18:21:54 +0100 | [diff] [blame] | 449 | "only hwdep device 0 can be registered as OSS direct FM device!\n"); |
Takashi Iwai | 7b46160 | 2015-01-29 17:13:32 +0100 | [diff] [blame] | 450 | else if (snd_register_oss_device(hwdep->oss_type, |
| 451 | card, hwdep->device, |
| 452 | &snd_hwdep_f_ops, hwdep) < 0) |
| 453 | dev_warn(&hwdep->dev, |
| 454 | "unable to register OSS compatibility device\n"); |
| 455 | else |
| 456 | hwdep->ossreg = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | #endif |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 459 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | return 0; |
| 461 | } |
| 462 | |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 463 | static int snd_hwdep_dev_disconnect(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 465 | struct snd_hwdep *hwdep = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 467 | if (snd_BUG_ON(!hwdep)) |
| 468 | return -ENXIO; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 469 | mutex_lock(®ister_mutex); |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 470 | if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 471 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | return -EINVAL; |
| 473 | } |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 474 | mutex_lock(&hwdep->open_mutex); |
| 475 | wake_up(&hwdep->open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | #ifdef CONFIG_SND_OSSEMUL |
| 477 | if (hwdep->ossreg) |
| 478 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); |
| 479 | #endif |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 480 | snd_unregister_device(&hwdep->dev); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 481 | list_del_init(&hwdep->list); |
Takashi Iwai | 0914f79 | 2012-10-16 16:43:39 +0200 | [diff] [blame] | 482 | mutex_unlock(&hwdep->open_mutex); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 483 | mutex_unlock(®ister_mutex); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 484 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } |
| 486 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 487 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | /* |
| 489 | * Info interface |
| 490 | */ |
| 491 | |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 492 | static void snd_hwdep_proc_read(struct snd_info_entry *entry, |
| 493 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 495 | struct snd_hwdep *hwdep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 497 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 498 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 500 | hwdep->card->number, hwdep->device, hwdep->name); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 501 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 504 | static struct snd_info_entry *snd_hwdep_proc_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 506 | static void __init snd_hwdep_proc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | { |
Takashi Iwai | d9a98de | 2005-11-17 13:58:21 +0100 | [diff] [blame] | 508 | struct snd_info_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | entry->c.text.read = snd_hwdep_proc_read; |
| 512 | if (snd_info_register(entry) < 0) { |
| 513 | snd_info_free_entry(entry); |
| 514 | entry = NULL; |
| 515 | } |
| 516 | } |
| 517 | snd_hwdep_proc_entry = entry; |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | static void __exit snd_hwdep_proc_done(void) |
| 521 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 522 | snd_info_free_entry(snd_hwdep_proc_entry); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 523 | } |
| 524 | #else /* !CONFIG_PROC_FS */ |
| 525 | #define snd_hwdep_proc_init() |
| 526 | #define snd_hwdep_proc_done() |
| 527 | #endif /* CONFIG_PROC_FS */ |
| 528 | |
| 529 | |
| 530 | /* |
| 531 | * ENTRY functions |
| 532 | */ |
| 533 | |
| 534 | static int __init alsa_hwdep_init(void) |
| 535 | { |
| 536 | snd_hwdep_proc_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
| 538 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | static void __exit alsa_hwdep_exit(void) |
| 543 | { |
| 544 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); |
| 545 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 546 | snd_hwdep_proc_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | module_init(alsa_hwdep_init) |
| 550 | module_exit(alsa_hwdep_exit) |