Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dvbdev.c |
| 3 | * |
| 4 | * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de> |
| 5 | * & Marcus Metzler <marcus@convergence.de> |
| 6 | * for convergence integrated media GmbH |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public License |
| 10 | * as published by the Free Software Foundation; either version 2.1 |
| 11 | * of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <linux/types.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/string.h> |
| 27 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/init.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/device.h> |
| 32 | #include <linux/fs.h> |
| 33 | #include <linux/cdev.h> |
Ingo Molnar | 1e4baed | 2006-01-15 07:52:23 -0200 | [diff] [blame] | 34 | #include <linux/mutex.h> |
Jonathan Corbet | 5794e1b | 2008-05-15 16:26:57 -0600 | [diff] [blame] | 35 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "dvbdev.h" |
| 37 | |
| 38 | static int dvbdev_debug; |
| 39 | |
| 40 | module_param(dvbdev_debug, int, 0644); |
| 41 | MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off)."); |
| 42 | |
| 43 | #define dprintk if (dvbdev_debug) printk |
| 44 | |
| 45 | static LIST_HEAD(dvb_adapter_list); |
Ingo Molnar | 1e4baed | 2006-01-15 07:52:23 -0200 | [diff] [blame] | 46 | static DEFINE_MUTEX(dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | static const char * const dnames[] = { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 49 | "video", "audio", "sec", "frontend", "demux", "dvr", "ca", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | "net", "osd" |
| 51 | }; |
| 52 | |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 53 | #ifdef CONFIG_DVB_DYNAMIC_MINORS |
| 54 | #define MAX_DVB_MINORS 256 |
| 55 | #define DVB_MAX_IDS MAX_DVB_MINORS |
| 56 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #define DVB_MAX_IDS 4 |
| 58 | #define nums2minor(num,type,id) ((num << 6) | (id << 4) | type) |
| 59 | #define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64) |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 60 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 62 | static struct class *dvb_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 64 | static struct dvb_device *dvb_minors[MAX_DVB_MINORS]; |
| 65 | static DECLARE_RWSEM(minor_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | static int dvb_device_open(struct inode *inode, struct file *file) |
| 68 | { |
| 69 | struct dvb_device *dvbdev; |
| 70 | |
Jonathan Corbet | 5794e1b | 2008-05-15 16:26:57 -0600 | [diff] [blame] | 71 | lock_kernel(); |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 72 | down_read(&minor_rwsem); |
| 73 | dvbdev = dvb_minors[iminor(inode)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | if (dvbdev && dvbdev->fops) { |
| 76 | int err = 0; |
Arjan van de Ven | 99ac48f | 2006-03-28 01:56:41 -0800 | [diff] [blame] | 77 | const struct file_operations *old_fops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | file->private_data = dvbdev; |
| 80 | old_fops = file->f_op; |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 81 | file->f_op = fops_get(dvbdev->fops); |
Laurent Pinchart | f41ced8 | 2009-01-06 14:40:40 -0800 | [diff] [blame^] | 82 | if (file->f_op == NULL) { |
| 83 | file->f_op = old_fops; |
| 84 | goto fail; |
| 85 | } |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 86 | if(file->f_op->open) |
Michael Krufky | 50c25ff | 2006-01-09 15:25:34 -0200 | [diff] [blame] | 87 | err = file->f_op->open(inode,file); |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 88 | if (err) { |
Michael Krufky | 50c25ff | 2006-01-09 15:25:34 -0200 | [diff] [blame] | 89 | fops_put(file->f_op); |
| 90 | file->f_op = fops_get(old_fops); |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 91 | } |
| 92 | fops_put(old_fops); |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 93 | up_read(&minor_rwsem); |
Jonathan Corbet | 5794e1b | 2008-05-15 16:26:57 -0600 | [diff] [blame] | 94 | unlock_kernel(); |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 95 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
Laurent Pinchart | f41ced8 | 2009-01-06 14:40:40 -0800 | [diff] [blame^] | 97 | fail: |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 98 | up_read(&minor_rwsem); |
Jonathan Corbet | 5794e1b | 2008-05-15 16:26:57 -0600 | [diff] [blame] | 99 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | return -ENODEV; |
| 101 | } |
| 102 | |
| 103 | |
Jan Engelhardt | 27a643b | 2008-04-22 14:42:01 -0300 | [diff] [blame] | 104 | static const struct file_operations dvb_device_fops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
| 106 | .owner = THIS_MODULE, |
| 107 | .open = dvb_device_open, |
| 108 | }; |
| 109 | |
Greg Kroah-Hartman | 7e7654a | 2007-09-12 15:06:57 -0700 | [diff] [blame] | 110 | static struct cdev dvb_device_cdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
| 112 | int dvb_generic_open(struct inode *inode, struct file *file) |
| 113 | { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 114 | struct dvb_device *dvbdev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 116 | if (!dvbdev) |
| 117 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | if (!dvbdev->users) |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 120 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 123 | if (!dvbdev->readers) |
| 124 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | dvbdev->readers--; |
| 126 | } else { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 127 | if (!dvbdev->writers) |
| 128 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | dvbdev->writers--; |
| 130 | } |
| 131 | |
| 132 | dvbdev->users--; |
| 133 | return 0; |
| 134 | } |
| 135 | EXPORT_SYMBOL(dvb_generic_open); |
| 136 | |
| 137 | |
| 138 | int dvb_generic_release(struct inode *inode, struct file *file) |
| 139 | { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 140 | struct dvb_device *dvbdev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | if (!dvbdev) |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 143 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { |
| 146 | dvbdev->readers++; |
| 147 | } else { |
| 148 | dvbdev->writers++; |
| 149 | } |
| 150 | |
| 151 | dvbdev->users++; |
| 152 | return 0; |
| 153 | } |
| 154 | EXPORT_SYMBOL(dvb_generic_release); |
| 155 | |
| 156 | |
| 157 | int dvb_generic_ioctl(struct inode *inode, struct file *file, |
| 158 | unsigned int cmd, unsigned long arg) |
| 159 | { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 160 | struct dvb_device *dvbdev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 162 | if (!dvbdev) |
| 163 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | if (!dvbdev->kernel_ioctl) |
| 166 | return -EINVAL; |
| 167 | |
| 168 | return dvb_usercopy (inode, file, cmd, arg, dvbdev->kernel_ioctl); |
| 169 | } |
| 170 | EXPORT_SYMBOL(dvb_generic_ioctl); |
| 171 | |
| 172 | |
| 173 | static int dvbdev_get_free_id (struct dvb_adapter *adap, int type) |
| 174 | { |
| 175 | u32 id = 0; |
| 176 | |
| 177 | while (id < DVB_MAX_IDS) { |
Trent Piepho | 7948261 | 2007-10-10 05:37:39 -0300 | [diff] [blame] | 178 | struct dvb_device *dev; |
| 179 | list_for_each_entry(dev, &adap->device_list, list_head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | if (dev->type == type && dev->id == id) |
| 181 | goto skip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | return id; |
| 183 | skip: |
| 184 | id++; |
| 185 | } |
| 186 | return -ENFILE; |
| 187 | } |
| 188 | |
| 189 | |
| 190 | int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, |
| 191 | const struct dvb_device *template, void *priv, int type) |
| 192 | { |
| 193 | struct dvb_device *dvbdev; |
Marcel Siegert | b619010 | 2007-02-13 09:46:55 -0300 | [diff] [blame] | 194 | struct file_operations *dvbdevfops; |
Kay Sievers | 5f55338 | 2007-08-15 14:00:09 -0300 | [diff] [blame] | 195 | struct device *clsdev; |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 196 | int minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | int id; |
| 198 | |
Simon Arlott | c278850 | 2007-03-10 06:21:25 -0300 | [diff] [blame] | 199 | mutex_lock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
Marcel Siegert | b619010 | 2007-02-13 09:46:55 -0300 | [diff] [blame] | 201 | if ((id = dvbdev_get_free_id (adap, type)) < 0){ |
Ingo Molnar | 1e4baed | 2006-01-15 07:52:23 -0200 | [diff] [blame] | 202 | mutex_unlock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | *pdvbdev = NULL; |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 204 | printk(KERN_ERR "%s: couldn't find free device id\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | return -ENFILE; |
| 206 | } |
| 207 | |
| 208 | *pdvbdev = dvbdev = kmalloc(sizeof(struct dvb_device), GFP_KERNEL); |
| 209 | |
Marcel Siegert | b619010 | 2007-02-13 09:46:55 -0300 | [diff] [blame] | 210 | if (!dvbdev){ |
| 211 | mutex_unlock(&dvbdev_register_lock); |
| 212 | return -ENOMEM; |
| 213 | } |
| 214 | |
| 215 | dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL); |
| 216 | |
| 217 | if (!dvbdevfops){ |
| 218 | kfree (dvbdev); |
Ingo Molnar | 1e4baed | 2006-01-15 07:52:23 -0200 | [diff] [blame] | 219 | mutex_unlock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return -ENOMEM; |
| 221 | } |
| 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | memcpy(dvbdev, template, sizeof(struct dvb_device)); |
| 224 | dvbdev->type = type; |
| 225 | dvbdev->id = id; |
| 226 | dvbdev->adapter = adap; |
| 227 | dvbdev->priv = priv; |
Marcel Siegert | b619010 | 2007-02-13 09:46:55 -0300 | [diff] [blame] | 228 | dvbdev->fops = dvbdevfops; |
Markus Rechberger | ca5be9c | 2007-04-14 10:18:58 -0300 | [diff] [blame] | 229 | init_waitqueue_head (&dvbdev->wait_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Marcel Siegert | b619010 | 2007-02-13 09:46:55 -0300 | [diff] [blame] | 231 | memcpy(dvbdev->fops, template->fops, sizeof(struct file_operations)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | dvbdev->fops->owner = adap->module; |
| 233 | |
| 234 | list_add_tail (&dvbdev->list_head, &adap->device_list); |
| 235 | |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 236 | down_write(&minor_rwsem); |
| 237 | #ifdef CONFIG_DVB_DYNAMIC_MINORS |
| 238 | for (minor = 0; minor < MAX_DVB_MINORS; minor++) |
| 239 | if (dvb_minors[minor] == NULL) |
| 240 | break; |
| 241 | |
| 242 | if (minor == MAX_DVB_MINORS) { |
| 243 | kfree(dvbdevfops); |
| 244 | kfree(dvbdev); |
| 245 | mutex_unlock(&dvbdev_register_lock); |
| 246 | return -EINVAL; |
| 247 | } |
| 248 | #else |
| 249 | minor = nums2minor(adap->num, type, id); |
| 250 | #endif |
| 251 | |
| 252 | dvbdev->minor = minor; |
| 253 | dvb_minors[minor] = dvbdev; |
| 254 | up_write(&minor_rwsem); |
| 255 | |
Andrew de Quincey | f47f476 | 2006-04-04 09:41:47 -0300 | [diff] [blame] | 256 | mutex_unlock(&dvbdev_register_lock); |
| 257 | |
Greg Kroah-Hartman | a9b1261 | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 258 | clsdev = device_create(dvb_class, adap->device, |
Hans Verkuil | b749678 | 2008-11-03 05:38:43 -0300 | [diff] [blame] | 259 | MKDEV(DVB_MAJOR, minor), |
Kay Sievers | a5f4c0c | 2008-10-27 22:27:37 -0300 | [diff] [blame] | 260 | dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id); |
Simon Arlott | 4abdcf9 | 2007-05-06 20:56:14 -0300 | [diff] [blame] | 261 | if (IS_ERR(clsdev)) { |
| 262 | printk(KERN_ERR "%s: failed to create device dvb%d.%s%d (%ld)\n", |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 263 | __func__, adap->num, dnames[type], id, PTR_ERR(clsdev)); |
Simon Arlott | 4abdcf9 | 2007-05-06 20:56:14 -0300 | [diff] [blame] | 264 | return PTR_ERR(clsdev); |
| 265 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
Simon Arlott | 900858e | 2007-05-06 21:06:32 -0300 | [diff] [blame] | 267 | dprintk(KERN_DEBUG "DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n", |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 268 | adap->num, dnames[type], id, minor, minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | EXPORT_SYMBOL(dvb_register_device); |
| 273 | |
| 274 | |
| 275 | void dvb_unregister_device(struct dvb_device *dvbdev) |
| 276 | { |
| 277 | if (!dvbdev) |
| 278 | return; |
| 279 | |
Andreas Oberritter | 5dd3f30 | 2008-10-23 12:11:19 -0300 | [diff] [blame] | 280 | down_write(&minor_rwsem); |
| 281 | dvb_minors[dvbdev->minor] = NULL; |
| 282 | up_write(&minor_rwsem); |
| 283 | |
| 284 | device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
| 286 | list_del (&dvbdev->list_head); |
Marcel Siegert | b619010 | 2007-02-13 09:46:55 -0300 | [diff] [blame] | 287 | kfree (dvbdev->fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | kfree (dvbdev); |
| 289 | } |
| 290 | EXPORT_SYMBOL(dvb_unregister_device); |
| 291 | |
Janne Grunau | 78e9200 | 2008-04-09 19:13:13 -0300 | [diff] [blame] | 292 | static int dvbdev_check_free_adapter_num(int num) |
| 293 | { |
| 294 | struct list_head *entry; |
| 295 | list_for_each(entry, &dvb_adapter_list) { |
| 296 | struct dvb_adapter *adap; |
| 297 | adap = list_entry(entry, struct dvb_adapter, list_head); |
| 298 | if (adap->num == num) |
| 299 | return 0; |
| 300 | } |
| 301 | return 1; |
| 302 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
| 304 | static int dvbdev_get_free_adapter_num (void) |
| 305 | { |
| 306 | int num = 0; |
| 307 | |
| 308 | while (num < DVB_MAX_ADAPTERS) { |
Janne Grunau | 78e9200 | 2008-04-09 19:13:13 -0300 | [diff] [blame] | 309 | if (dvbdev_check_free_adapter_num(num)) |
| 310 | return num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | num++; |
| 312 | } |
| 313 | |
| 314 | return -ENFILE; |
| 315 | } |
| 316 | |
| 317 | |
Janne Grunau | 78e9200 | 2008-04-09 19:13:13 -0300 | [diff] [blame] | 318 | int dvb_register_adapter(struct dvb_adapter *adap, const char *name, |
| 319 | struct module *module, struct device *device, |
| 320 | short *adapter_nums) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | { |
Janne Grunau | 78e9200 | 2008-04-09 19:13:13 -0300 | [diff] [blame] | 322 | int i, num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
Simon Arlott | c278850 | 2007-03-10 06:21:25 -0300 | [diff] [blame] | 324 | mutex_lock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Janne Grunau | 78e9200 | 2008-04-09 19:13:13 -0300 | [diff] [blame] | 326 | for (i = 0; i < DVB_MAX_ADAPTERS; ++i) { |
| 327 | num = adapter_nums[i]; |
| 328 | if (num >= 0 && num < DVB_MAX_ADAPTERS) { |
| 329 | /* use the one the driver asked for */ |
| 330 | if (dvbdev_check_free_adapter_num(num)) |
| 331 | break; |
| 332 | } else { |
| 333 | num = dvbdev_get_free_adapter_num(); |
| 334 | break; |
| 335 | } |
| 336 | num = -1; |
| 337 | } |
| 338 | |
| 339 | if (num < 0) { |
Ingo Molnar | 1e4baed | 2006-01-15 07:52:23 -0200 | [diff] [blame] | 340 | mutex_unlock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | return -ENFILE; |
| 342 | } |
| 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | memset (adap, 0, sizeof(struct dvb_adapter)); |
| 345 | INIT_LIST_HEAD (&adap->device_list); |
| 346 | |
Simon Arlott | 900858e | 2007-05-06 21:06:32 -0300 | [diff] [blame] | 347 | printk(KERN_INFO "DVB: registering new adapter (%s)\n", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | adap->num = num; |
| 350 | adap->name = name; |
| 351 | adap->module = module; |
Andrew de Quincey | d09dbf9 | 2006-04-10 09:27:37 -0300 | [diff] [blame] | 352 | adap->device = device; |
Darron Broad | 59b1842 | 2008-10-11 11:44:05 -0300 | [diff] [blame] | 353 | adap->mfe_shared = 0; |
| 354 | adap->mfe_dvbdev = NULL; |
| 355 | mutex_init (&adap->mfe_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
| 357 | list_add_tail (&adap->list_head, &dvb_adapter_list); |
| 358 | |
Ingo Molnar | 1e4baed | 2006-01-15 07:52:23 -0200 | [diff] [blame] | 359 | mutex_unlock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | return num; |
| 362 | } |
| 363 | EXPORT_SYMBOL(dvb_register_adapter); |
| 364 | |
| 365 | |
| 366 | int dvb_unregister_adapter(struct dvb_adapter *adap) |
| 367 | { |
Simon Arlott | c278850 | 2007-03-10 06:21:25 -0300 | [diff] [blame] | 368 | mutex_lock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | list_del (&adap->list_head); |
Ingo Molnar | 1e4baed | 2006-01-15 07:52:23 -0200 | [diff] [blame] | 370 | mutex_unlock(&dvbdev_register_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return 0; |
| 372 | } |
| 373 | EXPORT_SYMBOL(dvb_unregister_adapter); |
| 374 | |
| 375 | /* if the miracle happens and "generic_usercopy()" is included into |
| 376 | the kernel, then this can vanish. please don't make the mistake and |
| 377 | define this as video_usercopy(). this will introduce a dependecy |
| 378 | to the v4l "videodev.o" module, which is unnecessary for some |
| 379 | cards (ie. the budget dvb-cards don't need the v4l module...) */ |
| 380 | int dvb_usercopy(struct inode *inode, struct file *file, |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 381 | unsigned int cmd, unsigned long arg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | int (*func)(struct inode *inode, struct file *file, |
| 383 | unsigned int cmd, void *arg)) |
| 384 | { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 385 | char sbuf[128]; |
| 386 | void *mbuf = NULL; |
| 387 | void *parg = NULL; |
| 388 | int err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 390 | /* Copy arguments into temp kernel buffer */ |
| 391 | switch (_IOC_DIR(cmd)) { |
| 392 | case _IOC_NONE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | /* |
| 394 | * For this command, the pointer is actually an integer |
| 395 | * argument. |
| 396 | */ |
| 397 | parg = (void *) arg; |
| 398 | break; |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 399 | case _IOC_READ: /* some v4l ioctls are marked wrong ... */ |
| 400 | case _IOC_WRITE: |
| 401 | case (_IOC_WRITE | _IOC_READ): |
| 402 | if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { |
Michael Krufky | 50c25ff | 2006-01-09 15:25:34 -0200 | [diff] [blame] | 403 | parg = sbuf; |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 404 | } else { |
Michael Krufky | 50c25ff | 2006-01-09 15:25:34 -0200 | [diff] [blame] | 405 | /* too big to allocate from stack */ |
| 406 | mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL); |
| 407 | if (NULL == mbuf) |
| 408 | return -ENOMEM; |
| 409 | parg = mbuf; |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 410 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 412 | err = -EFAULT; |
| 413 | if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) |
Michael Krufky | 50c25ff | 2006-01-09 15:25:34 -0200 | [diff] [blame] | 414 | goto out; |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 415 | break; |
| 416 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 418 | /* call driver */ |
| 419 | if ((err = func(inode, file, cmd, parg)) == -ENOIOCTLCMD) |
| 420 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 422 | if (err < 0) |
| 423 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 425 | /* Copy results into user buffer */ |
| 426 | switch (_IOC_DIR(cmd)) |
| 427 | { |
| 428 | case _IOC_READ: |
| 429 | case (_IOC_WRITE | _IOC_READ): |
| 430 | if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) |
Michael Krufky | 50c25ff | 2006-01-09 15:25:34 -0200 | [diff] [blame] | 431 | err = -EFAULT; |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 432 | break; |
| 433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
| 435 | out: |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 436 | kfree(mbuf); |
| 437 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
Kay Sievers | a5f4c0c | 2008-10-27 22:27:37 -0300 | [diff] [blame] | 440 | static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 441 | { |
| 442 | struct dvb_device *dvbdev = dev_get_drvdata(dev); |
| 443 | |
Kay Sievers | a5f4c0c | 2008-10-27 22:27:37 -0300 | [diff] [blame] | 444 | add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num); |
Kay Sievers | 763d19b | 2008-12-31 23:35:24 -0300 | [diff] [blame] | 445 | add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]); |
| 446 | add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); |
Kay Sievers | a5f4c0c | 2008-10-27 22:27:37 -0300 | [diff] [blame] | 447 | return 0; |
| 448 | } |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | static int __init init_dvbdev(void) |
| 451 | { |
| 452 | int retval; |
| 453 | dev_t dev = MKDEV(DVB_MAJOR, 0); |
| 454 | |
| 455 | if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) { |
Simon Arlott | 900858e | 2007-05-06 21:06:32 -0300 | [diff] [blame] | 456 | printk(KERN_ERR "dvb-core: unable to get major %d\n", DVB_MAJOR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | return retval; |
| 458 | } |
| 459 | |
| 460 | cdev_init(&dvb_device_cdev, &dvb_device_fops); |
| 461 | if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) { |
Simon Arlott | 900858e | 2007-05-06 21:06:32 -0300 | [diff] [blame] | 462 | printk(KERN_ERR "dvb-core: unable register character device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | goto error; |
| 464 | } |
| 465 | |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 466 | dvb_class = class_create(THIS_MODULE, "dvb"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | if (IS_ERR(dvb_class)) { |
| 468 | retval = PTR_ERR(dvb_class); |
| 469 | goto error; |
| 470 | } |
Kay Sievers | a5f4c0c | 2008-10-27 22:27:37 -0300 | [diff] [blame] | 471 | dvb_class->dev_uevent = dvb_uevent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | return 0; |
| 473 | |
| 474 | error: |
| 475 | cdev_del(&dvb_device_cdev); |
| 476 | unregister_chrdev_region(dev, MAX_DVB_MINORS); |
| 477 | return retval; |
| 478 | } |
| 479 | |
| 480 | |
| 481 | static void __exit exit_dvbdev(void) |
| 482 | { |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 483 | class_destroy(dvb_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | cdev_del(&dvb_device_cdev); |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 485 | unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
Simon Arlott | 4abdcf9 | 2007-05-06 20:56:14 -0300 | [diff] [blame] | 488 | subsys_initcall(init_dvbdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | module_exit(exit_dvbdev); |
| 490 | |
| 491 | MODULE_DESCRIPTION("DVB Core Driver"); |
| 492 | MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler"); |
| 493 | MODULE_LICENSE("GPL"); |