YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | RFCOMM implementation for Linux Bluetooth stack (BlueZ). |
| 3 | Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> |
| 4 | Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org> |
| 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 version 2 as |
| 8 | published by the Free Software Foundation; |
| 9 | |
| 10 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 11 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 12 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 13 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 14 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 15 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 16 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 18 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 19 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 20 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | SOFTWARE IS DISCLAIMED. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * RFCOMM TTY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | */ |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | |
| 30 | #include <linux/tty.h> |
| 31 | #include <linux/tty_driver.h> |
| 32 | #include <linux/tty_flip.h> |
| 33 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 34 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/slab.h> |
| 36 | #include <linux/skbuff.h> |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 37 | #include <linux/workqueue.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <net/bluetooth/bluetooth.h> |
Marcel Holtmann | 0a85b96 | 2006-07-06 13:09:02 +0200 | [diff] [blame] | 40 | #include <net/bluetooth/hci_core.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <net/bluetooth/rfcomm.h> |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #define RFCOMM_TTY_MAGIC 0x6d02 /* magic number for rfcomm struct */ |
| 44 | #define RFCOMM_TTY_PORTS RFCOMM_MAX_DEV /* whole lotta rfcomm devices */ |
| 45 | #define RFCOMM_TTY_MAJOR 216 /* device node major id of the usb/bluetooth.c driver */ |
| 46 | #define RFCOMM_TTY_MINOR 0 |
| 47 | |
| 48 | static struct tty_driver *rfcomm_tty_driver; |
| 49 | |
| 50 | struct rfcomm_dev { |
| 51 | struct list_head list; |
| 52 | atomic_t refcnt; |
| 53 | |
| 54 | char name[12]; |
| 55 | int id; |
| 56 | unsigned long flags; |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 57 | atomic_t opened; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | int err; |
| 59 | |
| 60 | bdaddr_t src; |
| 61 | bdaddr_t dst; |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 62 | u8 channel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 64 | uint modem_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | struct rfcomm_dlc *dlc; |
| 67 | struct tty_struct *tty; |
| 68 | wait_queue_head_t wait; |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 69 | struct work_struct wakeup_task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Marcel Holtmann | c1a3313 | 2007-02-17 23:58:57 +0100 | [diff] [blame] | 71 | struct device *tty_dev; |
| 72 | |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 73 | atomic_t wmem_alloc; |
Marcel Holtmann | a0c22f2 | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 74 | |
| 75 | struct sk_buff_head pending; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | }; |
| 77 | |
| 78 | static LIST_HEAD(rfcomm_dev_list); |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 79 | static DEFINE_SPINLOCK(rfcomm_dev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb); |
| 82 | static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err); |
| 83 | static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig); |
| 84 | |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 85 | static void rfcomm_tty_wakeup(struct work_struct *work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | /* ---- Device functions ---- */ |
| 88 | static void rfcomm_dev_destruct(struct rfcomm_dev *dev) |
| 89 | { |
| 90 | struct rfcomm_dlc *dlc = dev->dlc; |
| 91 | |
| 92 | BT_DBG("dev %p dlc %p", dev, dlc); |
| 93 | |
Dave Young | f951375 | 2008-01-10 22:22:52 -0800 | [diff] [blame] | 94 | /* Refcount should only hit zero when called from rfcomm_dev_del() |
| 95 | which will have taken us off the list. Everything else are |
| 96 | refcounting bugs. */ |
| 97 | BUG_ON(!list_empty(&dev->list)); |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | rfcomm_dlc_lock(dlc); |
| 100 | /* Detach DLC if it's owned by this dev */ |
| 101 | if (dlc->owner == dev) |
| 102 | dlc->owner = NULL; |
| 103 | rfcomm_dlc_unlock(dlc); |
| 104 | |
| 105 | rfcomm_dlc_put(dlc); |
| 106 | |
| 107 | tty_unregister_device(rfcomm_tty_driver, dev->id); |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | kfree(dev); |
| 110 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 111 | /* It's safe to call module_put() here because socket still |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | holds reference to this module. */ |
| 113 | module_put(THIS_MODULE); |
| 114 | } |
| 115 | |
| 116 | static inline void rfcomm_dev_hold(struct rfcomm_dev *dev) |
| 117 | { |
| 118 | atomic_inc(&dev->refcnt); |
| 119 | } |
| 120 | |
| 121 | static inline void rfcomm_dev_put(struct rfcomm_dev *dev) |
| 122 | { |
| 123 | /* The reason this isn't actually a race, as you no |
| 124 | doubt have a little voice screaming at you in your |
| 125 | head, is that the refcount should never actually |
| 126 | reach zero unless the device has already been taken |
| 127 | off the list, in rfcomm_dev_del(). And if that's not |
| 128 | true, we'll hit the BUG() in rfcomm_dev_destruct() |
| 129 | anyway. */ |
| 130 | if (atomic_dec_and_test(&dev->refcnt)) |
| 131 | rfcomm_dev_destruct(dev); |
| 132 | } |
| 133 | |
| 134 | static struct rfcomm_dev *__rfcomm_dev_get(int id) |
| 135 | { |
| 136 | struct rfcomm_dev *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Luiz Augusto von Dentz | 8035ded | 2011-11-01 10:58:56 +0200 | [diff] [blame] | 138 | list_for_each_entry(dev, &rfcomm_dev_list, list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | if (dev->id == id) |
| 140 | return dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | return NULL; |
| 143 | } |
| 144 | |
| 145 | static inline struct rfcomm_dev *rfcomm_dev_get(int id) |
| 146 | { |
| 147 | struct rfcomm_dev *dev; |
| 148 | |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 149 | spin_lock(&rfcomm_dev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | dev = __rfcomm_dev_get(id); |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 152 | |
| 153 | if (dev) { |
| 154 | if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) |
| 155 | dev = NULL; |
| 156 | else |
| 157 | rfcomm_dev_hold(dev); |
| 158 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 160 | spin_unlock(&rfcomm_dev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
| 162 | return dev; |
| 163 | } |
| 164 | |
Marcel Holtmann | 0a85b96 | 2006-07-06 13:09:02 +0200 | [diff] [blame] | 165 | static struct device *rfcomm_get_device(struct rfcomm_dev *dev) |
| 166 | { |
| 167 | struct hci_dev *hdev; |
| 168 | struct hci_conn *conn; |
| 169 | |
| 170 | hdev = hci_get_route(&dev->dst, &dev->src); |
| 171 | if (!hdev) |
| 172 | return NULL; |
| 173 | |
| 174 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &dev->dst); |
Marcel Holtmann | 0a85b96 | 2006-07-06 13:09:02 +0200 | [diff] [blame] | 175 | |
| 176 | hci_dev_put(hdev); |
| 177 | |
Marcel Holtmann | b2cfcd7 | 2006-10-15 17:31:05 +0200 | [diff] [blame] | 178 | return conn ? &conn->dev : NULL; |
Marcel Holtmann | 0a85b96 | 2006-07-06 13:09:02 +0200 | [diff] [blame] | 179 | } |
| 180 | |
Marcel Holtmann | dae6a0f | 2007-10-20 14:52:38 +0200 | [diff] [blame] | 181 | static ssize_t show_address(struct device *tty_dev, struct device_attribute *attr, char *buf) |
| 182 | { |
| 183 | struct rfcomm_dev *dev = dev_get_drvdata(tty_dev); |
Gustavo F. Padovan | d6b2eb2 | 2010-09-03 18:29:46 -0300 | [diff] [blame] | 184 | return sprintf(buf, "%s\n", batostr(&dev->dst)); |
Marcel Holtmann | dae6a0f | 2007-10-20 14:52:38 +0200 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | static ssize_t show_channel(struct device *tty_dev, struct device_attribute *attr, char *buf) |
| 188 | { |
| 189 | struct rfcomm_dev *dev = dev_get_drvdata(tty_dev); |
| 190 | return sprintf(buf, "%d\n", dev->channel); |
| 191 | } |
| 192 | |
| 193 | static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); |
| 194 | static DEVICE_ATTR(channel, S_IRUGO, show_channel, NULL); |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc) |
| 197 | { |
Luiz Augusto von Dentz | 8035ded | 2011-11-01 10:58:56 +0200 | [diff] [blame] | 198 | struct rfcomm_dev *dev, *entry; |
Luiz Augusto von Dentz | e57d758a | 2012-03-07 20:20:14 +0200 | [diff] [blame] | 199 | struct list_head *head = &rfcomm_dev_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | int err = 0; |
| 201 | |
| 202 | BT_DBG("id %d channel %d", req->dev_id, req->channel); |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 203 | |
Marcel Holtmann | 25ea6db | 2006-07-06 15:40:09 +0200 | [diff] [blame] | 204 | dev = kzalloc(sizeof(struct rfcomm_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | if (!dev) |
| 206 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 208 | spin_lock(&rfcomm_dev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | if (req->dev_id < 0) { |
| 211 | dev->id = 0; |
| 212 | |
Luiz Augusto von Dentz | 8035ded | 2011-11-01 10:58:56 +0200 | [diff] [blame] | 213 | list_for_each_entry(entry, &rfcomm_dev_list, list) { |
| 214 | if (entry->id != dev->id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | break; |
| 216 | |
| 217 | dev->id++; |
Luiz Augusto von Dentz | e57d758a | 2012-03-07 20:20:14 +0200 | [diff] [blame] | 218 | head = &entry->list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | } else { |
| 221 | dev->id = req->dev_id; |
| 222 | |
Luiz Augusto von Dentz | 8035ded | 2011-11-01 10:58:56 +0200 | [diff] [blame] | 223 | list_for_each_entry(entry, &rfcomm_dev_list, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | if (entry->id == dev->id) { |
| 225 | err = -EADDRINUSE; |
| 226 | goto out; |
| 227 | } |
| 228 | |
| 229 | if (entry->id > dev->id - 1) |
| 230 | break; |
| 231 | |
Luiz Augusto von Dentz | e57d758a | 2012-03-07 20:20:14 +0200 | [diff] [blame] | 232 | head = &entry->list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | } |
| 235 | |
| 236 | if ((dev->id < 0) || (dev->id > RFCOMM_MAX_DEV - 1)) { |
| 237 | err = -ENFILE; |
| 238 | goto out; |
| 239 | } |
| 240 | |
| 241 | sprintf(dev->name, "rfcomm%d", dev->id); |
| 242 | |
| 243 | list_add(&dev->list, head); |
| 244 | atomic_set(&dev->refcnt, 1); |
| 245 | |
| 246 | bacpy(&dev->src, &req->src); |
| 247 | bacpy(&dev->dst, &req->dst); |
| 248 | dev->channel = req->channel; |
| 249 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 250 | dev->flags = req->flags & |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | ((1 << RFCOMM_RELEASE_ONHUP) | (1 << RFCOMM_REUSE_DLC)); |
| 252 | |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 253 | atomic_set(&dev->opened, 0); |
| 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | init_waitqueue_head(&dev->wait); |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 256 | INIT_WORK(&dev->wakeup_task, rfcomm_tty_wakeup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Marcel Holtmann | a0c22f2 | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 258 | skb_queue_head_init(&dev->pending); |
| 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | rfcomm_dlc_lock(dlc); |
Marcel Holtmann | a0c22f2 | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 261 | |
| 262 | if (req->flags & (1 << RFCOMM_REUSE_DLC)) { |
| 263 | struct sock *sk = dlc->owner; |
| 264 | struct sk_buff *skb; |
| 265 | |
| 266 | BUG_ON(!sk); |
| 267 | |
| 268 | rfcomm_dlc_throttle(dlc); |
| 269 | |
| 270 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { |
| 271 | skb_orphan(skb); |
| 272 | skb_queue_tail(&dev->pending, skb); |
| 273 | atomic_sub(skb->len, &sk->sk_rmem_alloc); |
| 274 | } |
| 275 | } |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | dlc->data_ready = rfcomm_dev_data_ready; |
| 278 | dlc->state_change = rfcomm_dev_state_change; |
| 279 | dlc->modem_status = rfcomm_dev_modem_status; |
| 280 | |
| 281 | dlc->owner = dev; |
| 282 | dev->dlc = dlc; |
Marcel Holtmann | 8b6b3da | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 283 | |
| 284 | rfcomm_dev_modem_status(dlc, dlc->remote_v24_sig); |
| 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | rfcomm_dlc_unlock(dlc); |
| 287 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 288 | /* It's safe to call __module_get() here because socket already |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | holds reference to this module. */ |
| 290 | __module_get(THIS_MODULE); |
| 291 | |
| 292 | out: |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 293 | spin_unlock(&rfcomm_dev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Ilpo Järvinen | 037322a | 2008-12-14 23:18:00 -0800 | [diff] [blame] | 295 | if (err < 0) |
| 296 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
Marcel Holtmann | c1a3313 | 2007-02-17 23:58:57 +0100 | [diff] [blame] | 298 | dev->tty_dev = tty_register_device(rfcomm_tty_driver, dev->id, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 300 | if (IS_ERR(dev->tty_dev)) { |
Marcel Holtmann | 09c7d82 | 2007-07-26 00:12:25 -0700 | [diff] [blame] | 301 | err = PTR_ERR(dev->tty_dev); |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 302 | list_del(&dev->list); |
Ilpo Järvinen | 037322a | 2008-12-14 23:18:00 -0800 | [diff] [blame] | 303 | goto free; |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 304 | } |
| 305 | |
Marcel Holtmann | dae6a0f | 2007-10-20 14:52:38 +0200 | [diff] [blame] | 306 | dev_set_drvdata(dev->tty_dev, dev); |
| 307 | |
| 308 | if (device_create_file(dev->tty_dev, &dev_attr_address) < 0) |
| 309 | BT_ERR("Failed to create address attribute"); |
| 310 | |
| 311 | if (device_create_file(dev->tty_dev, &dev_attr_channel) < 0) |
| 312 | BT_ERR("Failed to create channel attribute"); |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | return dev->id; |
Ilpo Järvinen | 037322a | 2008-12-14 23:18:00 -0800 | [diff] [blame] | 315 | |
| 316 | free: |
| 317 | kfree(dev); |
| 318 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | static void rfcomm_dev_del(struct rfcomm_dev *dev) |
| 322 | { |
| 323 | BT_DBG("dev %p", dev); |
| 324 | |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 325 | BUG_ON(test_and_set_bit(RFCOMM_TTY_RELEASED, &dev->flags)); |
| 326 | |
| 327 | if (atomic_read(&dev->opened) > 0) |
| 328 | return; |
Dave Young | f951375 | 2008-01-10 22:22:52 -0800 | [diff] [blame] | 329 | |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 330 | spin_lock(&rfcomm_dev_lock); |
Dave Young | f951375 | 2008-01-10 22:22:52 -0800 | [diff] [blame] | 331 | list_del_init(&dev->list); |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 332 | spin_unlock(&rfcomm_dev_lock); |
Dave Young | f951375 | 2008-01-10 22:22:52 -0800 | [diff] [blame] | 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | rfcomm_dev_put(dev); |
| 335 | } |
| 336 | |
| 337 | /* ---- Send buffer ---- */ |
| 338 | static inline unsigned int rfcomm_room(struct rfcomm_dlc *dlc) |
| 339 | { |
| 340 | /* We can't let it be zero, because we don't get a callback |
| 341 | when tx_credits becomes nonzero, hence we'd never wake up */ |
| 342 | return dlc->mtu * (dlc->tx_credits?:1); |
| 343 | } |
| 344 | |
| 345 | static void rfcomm_wfree(struct sk_buff *skb) |
| 346 | { |
| 347 | struct rfcomm_dev *dev = (void *) skb->sk; |
| 348 | atomic_sub(skb->truesize, &dev->wmem_alloc); |
| 349 | if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags)) |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 350 | queue_work(system_nrt_wq, &dev->wakeup_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | rfcomm_dev_put(dev); |
| 352 | } |
| 353 | |
| 354 | static inline void rfcomm_set_owner_w(struct sk_buff *skb, struct rfcomm_dev *dev) |
| 355 | { |
| 356 | rfcomm_dev_hold(dev); |
| 357 | atomic_add(skb->truesize, &dev->wmem_alloc); |
| 358 | skb->sk = (void *) dev; |
| 359 | skb->destructor = rfcomm_wfree; |
| 360 | } |
| 361 | |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 362 | static struct sk_buff *rfcomm_wmalloc(struct rfcomm_dev *dev, unsigned long size, gfp_t priority) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | { |
| 364 | if (atomic_read(&dev->wmem_alloc) < rfcomm_room(dev->dlc)) { |
| 365 | struct sk_buff *skb = alloc_skb(size, priority); |
| 366 | if (skb) { |
| 367 | rfcomm_set_owner_w(skb, dev); |
| 368 | return skb; |
| 369 | } |
| 370 | } |
| 371 | return NULL; |
| 372 | } |
| 373 | |
| 374 | /* ---- Device IOCTLs ---- */ |
| 375 | |
| 376 | #define NOCAP_FLAGS ((1 << RFCOMM_REUSE_DLC) | (1 << RFCOMM_RELEASE_ONHUP)) |
| 377 | |
| 378 | static int rfcomm_create_dev(struct sock *sk, void __user *arg) |
| 379 | { |
| 380 | struct rfcomm_dev_req req; |
| 381 | struct rfcomm_dlc *dlc; |
| 382 | int id; |
| 383 | |
| 384 | if (copy_from_user(&req, arg, sizeof(req))) |
| 385 | return -EFAULT; |
| 386 | |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 387 | BT_DBG("sk %p dev_id %d flags 0x%x", sk, req.dev_id, req.flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
| 389 | if (req.flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) |
| 390 | return -EPERM; |
| 391 | |
| 392 | if (req.flags & (1 << RFCOMM_REUSE_DLC)) { |
| 393 | /* Socket must be connected */ |
| 394 | if (sk->sk_state != BT_CONNECTED) |
| 395 | return -EBADFD; |
| 396 | |
| 397 | dlc = rfcomm_pi(sk)->dlc; |
| 398 | rfcomm_dlc_hold(dlc); |
| 399 | } else { |
| 400 | dlc = rfcomm_dlc_alloc(GFP_KERNEL); |
| 401 | if (!dlc) |
| 402 | return -ENOMEM; |
| 403 | } |
| 404 | |
| 405 | id = rfcomm_dev_add(&req, dlc); |
| 406 | if (id < 0) { |
| 407 | rfcomm_dlc_put(dlc); |
| 408 | return id; |
| 409 | } |
| 410 | |
| 411 | if (req.flags & (1 << RFCOMM_REUSE_DLC)) { |
| 412 | /* DLC is now used by device. |
| 413 | * Socket must be disconnected */ |
| 414 | sk->sk_state = BT_CLOSED; |
| 415 | } |
| 416 | |
| 417 | return id; |
| 418 | } |
| 419 | |
| 420 | static int rfcomm_release_dev(void __user *arg) |
| 421 | { |
| 422 | struct rfcomm_dev_req req; |
| 423 | struct rfcomm_dev *dev; |
| 424 | |
| 425 | if (copy_from_user(&req, arg, sizeof(req))) |
| 426 | return -EFAULT; |
| 427 | |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 428 | BT_DBG("dev_id %d flags 0x%x", req.dev_id, req.flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 430 | dev = rfcomm_dev_get(req.dev_id); |
| 431 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | return -ENODEV; |
| 433 | |
| 434 | if (dev->flags != NOCAP_FLAGS && !capable(CAP_NET_ADMIN)) { |
| 435 | rfcomm_dev_put(dev); |
| 436 | return -EPERM; |
| 437 | } |
| 438 | |
| 439 | if (req.flags & (1 << RFCOMM_HANGUP_NOW)) |
| 440 | rfcomm_dlc_close(dev->dlc, 0); |
| 441 | |
Mikko Rapeli | 84950cf | 2007-07-11 09:18:15 +0200 | [diff] [blame] | 442 | /* Shut down TTY synchronously before freeing rfcomm_dev */ |
| 443 | if (dev->tty) |
| 444 | tty_vhangup(dev->tty); |
| 445 | |
Dave Young | 93d8074 | 2008-02-05 03:12:06 -0800 | [diff] [blame] | 446 | if (!test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) |
| 447 | rfcomm_dev_del(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | rfcomm_dev_put(dev); |
| 449 | return 0; |
| 450 | } |
| 451 | |
| 452 | static int rfcomm_get_dev_list(void __user *arg) |
| 453 | { |
Luiz Augusto von Dentz | 8035ded | 2011-11-01 10:58:56 +0200 | [diff] [blame] | 454 | struct rfcomm_dev *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | struct rfcomm_dev_list_req *dl; |
| 456 | struct rfcomm_dev_info *di; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | int n = 0, size, err; |
| 458 | u16 dev_num; |
| 459 | |
| 460 | BT_DBG(""); |
| 461 | |
| 462 | if (get_user(dev_num, (u16 __user *) arg)) |
| 463 | return -EFAULT; |
| 464 | |
| 465 | if (!dev_num || dev_num > (PAGE_SIZE * 4) / sizeof(*di)) |
| 466 | return -EINVAL; |
| 467 | |
| 468 | size = sizeof(*dl) + dev_num * sizeof(*di); |
| 469 | |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 470 | dl = kmalloc(size, GFP_KERNEL); |
| 471 | if (!dl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | return -ENOMEM; |
| 473 | |
| 474 | di = dl->dev_info; |
| 475 | |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 476 | spin_lock(&rfcomm_dev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
Luiz Augusto von Dentz | 8035ded | 2011-11-01 10:58:56 +0200 | [diff] [blame] | 478 | list_for_each_entry(dev, &rfcomm_dev_list, list) { |
Ville Tervo | 8de0a15 | 2007-07-11 09:23:41 +0200 | [diff] [blame] | 479 | if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) |
| 480 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | (di + n)->id = dev->id; |
| 482 | (di + n)->flags = dev->flags; |
| 483 | (di + n)->state = dev->dlc->state; |
| 484 | (di + n)->channel = dev->channel; |
| 485 | bacpy(&(di + n)->src, &dev->src); |
| 486 | bacpy(&(di + n)->dst, &dev->dst); |
| 487 | if (++n >= dev_num) |
| 488 | break; |
| 489 | } |
| 490 | |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 491 | spin_unlock(&rfcomm_dev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 493 | dl->dev_num = n; |
| 494 | size = sizeof(*dl) + n * sizeof(*di); |
| 495 | |
| 496 | err = copy_to_user(arg, dl, size); |
| 497 | kfree(dl); |
| 498 | |
| 499 | return err ? -EFAULT : 0; |
| 500 | } |
| 501 | |
| 502 | static int rfcomm_get_dev_info(void __user *arg) |
| 503 | { |
| 504 | struct rfcomm_dev *dev; |
| 505 | struct rfcomm_dev_info di; |
| 506 | int err = 0; |
| 507 | |
| 508 | BT_DBG(""); |
| 509 | |
| 510 | if (copy_from_user(&di, arg, sizeof(di))) |
| 511 | return -EFAULT; |
| 512 | |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 513 | dev = rfcomm_dev_get(di.id); |
| 514 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | return -ENODEV; |
| 516 | |
| 517 | di.flags = dev->flags; |
| 518 | di.channel = dev->channel; |
| 519 | di.state = dev->dlc->state; |
| 520 | bacpy(&di.src, &dev->src); |
| 521 | bacpy(&di.dst, &dev->dst); |
| 522 | |
| 523 | if (copy_to_user(arg, &di, sizeof(di))) |
| 524 | err = -EFAULT; |
| 525 | |
| 526 | rfcomm_dev_put(dev); |
| 527 | return err; |
| 528 | } |
| 529 | |
| 530 | int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) |
| 531 | { |
| 532 | BT_DBG("cmd %d arg %p", cmd, arg); |
| 533 | |
| 534 | switch (cmd) { |
| 535 | case RFCOMMCREATEDEV: |
| 536 | return rfcomm_create_dev(sk, arg); |
| 537 | |
| 538 | case RFCOMMRELEASEDEV: |
| 539 | return rfcomm_release_dev(arg); |
| 540 | |
| 541 | case RFCOMMGETDEVLIST: |
| 542 | return rfcomm_get_dev_list(arg); |
| 543 | |
| 544 | case RFCOMMGETDEVINFO: |
| 545 | return rfcomm_get_dev_info(arg); |
| 546 | } |
| 547 | |
| 548 | return -EINVAL; |
| 549 | } |
| 550 | |
| 551 | /* ---- DLC callbacks ---- */ |
| 552 | static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb) |
| 553 | { |
| 554 | struct rfcomm_dev *dev = dlc->owner; |
| 555 | struct tty_struct *tty; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 556 | |
Marcel Holtmann | a0c22f2 | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 557 | if (!dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | kfree_skb(skb); |
| 559 | return; |
| 560 | } |
| 561 | |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 562 | tty = dev->tty; |
| 563 | if (!tty || !skb_queue_empty(&dev->pending)) { |
Marcel Holtmann | a0c22f2 | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 564 | skb_queue_tail(&dev->pending, skb); |
| 565 | return; |
| 566 | } |
| 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | BT_DBG("dlc %p tty %p len %d", dlc, tty, skb->len); |
| 569 | |
Paul Fulghum | 817d6d3 | 2006-06-28 04:26:47 -0700 | [diff] [blame] | 570 | tty_insert_flip_string(tty, skb->data, skb->len); |
| 571 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
| 573 | kfree_skb(skb); |
| 574 | } |
| 575 | |
| 576 | static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err) |
| 577 | { |
| 578 | struct rfcomm_dev *dev = dlc->owner; |
| 579 | if (!dev) |
| 580 | return; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | BT_DBG("dlc %p dev %p err %d", dlc, dev, err); |
| 583 | |
| 584 | dev->err = err; |
| 585 | wake_up_interruptible(&dev->wait); |
| 586 | |
| 587 | if (dlc->state == BT_CLOSED) { |
| 588 | if (!dev->tty) { |
| 589 | if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) { |
Dave Young | 537d59a | 2008-06-01 23:50:52 -0700 | [diff] [blame] | 590 | /* Drop DLC lock here to avoid deadlock |
| 591 | * 1. rfcomm_dev_get will take rfcomm_dev_lock |
| 592 | * but in rfcomm_dev_add there's lock order: |
| 593 | * rfcomm_dev_lock -> dlc lock |
| 594 | * 2. rfcomm_dev_put will deadlock if it's |
| 595 | * the last reference |
| 596 | */ |
| 597 | rfcomm_dlc_unlock(dlc); |
| 598 | if (rfcomm_dev_get(dev->id) == NULL) { |
| 599 | rfcomm_dlc_lock(dlc); |
Marcel Holtmann | 77f2a45 | 2007-05-05 00:36:10 +0200 | [diff] [blame] | 600 | return; |
Dave Young | 537d59a | 2008-06-01 23:50:52 -0700 | [diff] [blame] | 601 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
Marcel Holtmann | 77f2a45 | 2007-05-05 00:36:10 +0200 | [diff] [blame] | 603 | rfcomm_dev_del(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | rfcomm_dev_put(dev); |
Dave Young | 537d59a | 2008-06-01 23:50:52 -0700 | [diff] [blame] | 605 | rfcomm_dlc_lock(dlc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | } |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 607 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | tty_hangup(dev->tty); |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig) |
| 613 | { |
| 614 | struct rfcomm_dev *dev = dlc->owner; |
| 615 | if (!dev) |
| 616 | return; |
Timo Teräs | 7b9eb9e | 2005-08-09 20:28:21 -0700 | [diff] [blame] | 617 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | BT_DBG("dlc %p dev %p v24_sig 0x%02x", dlc, dev, v24_sig); |
| 619 | |
Timo Teräs | 7b9eb9e | 2005-08-09 20:28:21 -0700 | [diff] [blame] | 620 | if ((dev->modem_status & TIOCM_CD) && !(v24_sig & RFCOMM_V24_DV)) { |
| 621 | if (dev->tty && !C_CLOCAL(dev->tty)) |
| 622 | tty_hangup(dev->tty); |
| 623 | } |
| 624 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 625 | dev->modem_status = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | ((v24_sig & RFCOMM_V24_RTC) ? (TIOCM_DSR | TIOCM_DTR) : 0) | |
| 627 | ((v24_sig & RFCOMM_V24_RTR) ? (TIOCM_RTS | TIOCM_CTS) : 0) | |
| 628 | ((v24_sig & RFCOMM_V24_IC) ? TIOCM_RI : 0) | |
| 629 | ((v24_sig & RFCOMM_V24_DV) ? TIOCM_CD : 0); |
| 630 | } |
| 631 | |
| 632 | /* ---- TTY functions ---- */ |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 633 | static void rfcomm_tty_wakeup(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | { |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 635 | struct rfcomm_dev *dev = container_of(work, struct rfcomm_dev, |
| 636 | wakeup_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | struct tty_struct *tty = dev->tty; |
| 638 | if (!tty) |
| 639 | return; |
| 640 | |
| 641 | BT_DBG("dev %p tty %p", dev, tty); |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 642 | tty_wakeup(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | |
Marcel Holtmann | a0c22f2 | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 645 | static void rfcomm_tty_copy_pending(struct rfcomm_dev *dev) |
| 646 | { |
| 647 | struct tty_struct *tty = dev->tty; |
| 648 | struct sk_buff *skb; |
| 649 | int inserted = 0; |
| 650 | |
| 651 | if (!tty) |
| 652 | return; |
| 653 | |
| 654 | BT_DBG("dev %p tty %p", dev, tty); |
| 655 | |
| 656 | rfcomm_dlc_lock(dev->dlc); |
| 657 | |
| 658 | while ((skb = skb_dequeue(&dev->pending))) { |
| 659 | inserted += tty_insert_flip_string(tty, skb->data, skb->len); |
| 660 | kfree_skb(skb); |
| 661 | } |
| 662 | |
| 663 | rfcomm_dlc_unlock(dev->dlc); |
| 664 | |
| 665 | if (inserted > 0) |
| 666 | tty_flip_buffer_push(tty); |
| 667 | } |
| 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp) |
| 670 | { |
| 671 | DECLARE_WAITQUEUE(wait, current); |
| 672 | struct rfcomm_dev *dev; |
| 673 | struct rfcomm_dlc *dlc; |
| 674 | int err, id; |
| 675 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 676 | id = tty->index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | BT_DBG("tty %p id %d", tty, id); |
| 679 | |
| 680 | /* We don't leak this refcount. For reasons which are not entirely |
| 681 | clear, the TTY layer will call our ->close() method even if the |
| 682 | open fails. We decrease the refcount there, and decreasing it |
| 683 | here too would cause breakage. */ |
| 684 | dev = rfcomm_dev_get(id); |
| 685 | if (!dev) |
| 686 | return -ENODEV; |
| 687 | |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 688 | BT_DBG("dev %p dst %s channel %d opened %d", dev, batostr(&dev->dst), |
| 689 | dev->channel, atomic_read(&dev->opened)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 691 | if (atomic_inc_return(&dev->opened) > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | return 0; |
| 693 | |
| 694 | dlc = dev->dlc; |
| 695 | |
| 696 | /* Attach TTY and open DLC */ |
| 697 | |
| 698 | rfcomm_dlc_lock(dlc); |
| 699 | tty->driver_data = dev; |
| 700 | dev->tty = tty; |
| 701 | rfcomm_dlc_unlock(dlc); |
| 702 | set_bit(RFCOMM_TTY_ATTACHED, &dev->flags); |
| 703 | |
| 704 | err = rfcomm_dlc_open(dlc, &dev->src, &dev->dst, dev->channel); |
| 705 | if (err < 0) |
| 706 | return err; |
| 707 | |
| 708 | /* Wait for DLC to connect */ |
| 709 | add_wait_queue(&dev->wait, &wait); |
| 710 | while (1) { |
| 711 | set_current_state(TASK_INTERRUPTIBLE); |
| 712 | |
| 713 | if (dlc->state == BT_CLOSED) { |
| 714 | err = -dev->err; |
| 715 | break; |
| 716 | } |
| 717 | |
| 718 | if (dlc->state == BT_CONNECTED) |
| 719 | break; |
| 720 | |
| 721 | if (signal_pending(current)) { |
| 722 | err = -EINTR; |
| 723 | break; |
| 724 | } |
| 725 | |
Vladislav P | 840af82 | 2011-02-14 15:21:50 -0200 | [diff] [blame] | 726 | tty_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | schedule(); |
Vladislav P | 840af82 | 2011-02-14 15:21:50 -0200 | [diff] [blame] | 728 | tty_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
| 730 | set_current_state(TASK_RUNNING); |
| 731 | remove_wait_queue(&dev->wait, &wait); |
| 732 | |
Marcel Holtmann | c1a3313 | 2007-02-17 23:58:57 +0100 | [diff] [blame] | 733 | if (err == 0) |
Cornelia Huck | ffa6a70 | 2009-03-04 12:44:00 +0100 | [diff] [blame] | 734 | device_move(dev->tty_dev, rfcomm_get_device(dev), |
| 735 | DPM_ORDER_DEV_AFTER_PARENT); |
Marcel Holtmann | c1a3313 | 2007-02-17 23:58:57 +0100 | [diff] [blame] | 736 | |
Marcel Holtmann | a0c22f2 | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 737 | rfcomm_tty_copy_pending(dev); |
| 738 | |
| 739 | rfcomm_dlc_unthrottle(dev->dlc); |
| 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | return err; |
| 742 | } |
| 743 | |
| 744 | static void rfcomm_tty_close(struct tty_struct *tty, struct file *filp) |
| 745 | { |
| 746 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
| 747 | if (!dev) |
| 748 | return; |
| 749 | |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 750 | BT_DBG("tty %p dev %p dlc %p opened %d", tty, dev, dev->dlc, |
| 751 | atomic_read(&dev->opened)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 753 | if (atomic_dec_and_test(&dev->opened)) { |
Dave Young | acea685 | 2008-01-21 22:35:21 -0800 | [diff] [blame] | 754 | if (dev->tty_dev->parent) |
Cornelia Huck | ffa6a70 | 2009-03-04 12:44:00 +0100 | [diff] [blame] | 755 | device_move(dev->tty_dev, NULL, DPM_ORDER_DEV_LAST); |
Marcel Holtmann | c1a3313 | 2007-02-17 23:58:57 +0100 | [diff] [blame] | 756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | /* Close DLC and dettach TTY */ |
| 758 | rfcomm_dlc_close(dev->dlc, 0); |
| 759 | |
| 760 | clear_bit(RFCOMM_TTY_ATTACHED, &dev->flags); |
David Herrmann | 96af739 | 2011-10-24 15:30:58 +0200 | [diff] [blame] | 761 | cancel_work_sync(&dev->wakeup_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
| 763 | rfcomm_dlc_lock(dev->dlc); |
| 764 | tty->driver_data = NULL; |
| 765 | dev->tty = NULL; |
| 766 | rfcomm_dlc_unlock(dev->dlc); |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 767 | |
| 768 | if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) { |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 769 | spin_lock(&rfcomm_dev_lock); |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 770 | list_del_init(&dev->list); |
Gustavo F. Padovan | 393432c | 2011-12-27 15:28:45 -0200 | [diff] [blame] | 771 | spin_unlock(&rfcomm_dev_lock); |
Marcel Holtmann | 9a5df92 | 2008-11-30 12:17:29 +0100 | [diff] [blame] | 772 | |
| 773 | rfcomm_dev_put(dev); |
| 774 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | } |
| 776 | |
| 777 | rfcomm_dev_put(dev); |
| 778 | } |
| 779 | |
| 780 | static int rfcomm_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| 781 | { |
| 782 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
| 783 | struct rfcomm_dlc *dlc = dev->dlc; |
| 784 | struct sk_buff *skb; |
| 785 | int err = 0, sent = 0, size; |
| 786 | |
| 787 | BT_DBG("tty %p count %d", tty, count); |
| 788 | |
| 789 | while (count) { |
| 790 | size = min_t(uint, count, dlc->mtu); |
| 791 | |
| 792 | skb = rfcomm_wmalloc(dev, size + RFCOMM_SKB_RESERVE, GFP_ATOMIC); |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 793 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (!skb) |
| 795 | break; |
| 796 | |
| 797 | skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE); |
| 798 | |
| 799 | memcpy(skb_put(skb, size), buf + sent, size); |
| 800 | |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 801 | err = rfcomm_dlc_send(dlc, skb); |
| 802 | if (err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | kfree_skb(skb); |
| 804 | break; |
| 805 | } |
| 806 | |
| 807 | sent += size; |
| 808 | count -= size; |
| 809 | } |
| 810 | |
| 811 | return sent ? sent : err; |
| 812 | } |
| 813 | |
| 814 | static int rfcomm_tty_write_room(struct tty_struct *tty) |
| 815 | { |
| 816 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
| 817 | int room; |
| 818 | |
| 819 | BT_DBG("tty %p", tty); |
| 820 | |
Marcel Holtmann | b6e557f | 2007-01-08 02:16:27 +0100 | [diff] [blame] | 821 | if (!dev || !dev->dlc) |
| 822 | return 0; |
| 823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | room = rfcomm_room(dev->dlc) - atomic_read(&dev->wmem_alloc); |
| 825 | if (room < 0) |
| 826 | room = 0; |
Marcel Holtmann | b6e557f | 2007-01-08 02:16:27 +0100 | [diff] [blame] | 827 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | return room; |
| 829 | } |
| 830 | |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 831 | static int rfcomm_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | { |
| 833 | BT_DBG("tty %p cmd 0x%02x", tty, cmd); |
| 834 | |
| 835 | switch (cmd) { |
| 836 | case TCGETS: |
| 837 | BT_DBG("TCGETS is not supported"); |
| 838 | return -ENOIOCTLCMD; |
| 839 | |
| 840 | case TCSETS: |
| 841 | BT_DBG("TCSETS is not supported"); |
| 842 | return -ENOIOCTLCMD; |
| 843 | |
| 844 | case TIOCMIWAIT: |
| 845 | BT_DBG("TIOCMIWAIT"); |
| 846 | break; |
| 847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | case TIOCGSERIAL: |
| 849 | BT_ERR("TIOCGSERIAL is not supported"); |
| 850 | return -ENOIOCTLCMD; |
| 851 | |
| 852 | case TIOCSSERIAL: |
| 853 | BT_ERR("TIOCSSERIAL is not supported"); |
| 854 | return -ENOIOCTLCMD; |
| 855 | |
| 856 | case TIOCSERGSTRUCT: |
| 857 | BT_ERR("TIOCSERGSTRUCT is not supported"); |
| 858 | return -ENOIOCTLCMD; |
| 859 | |
| 860 | case TIOCSERGETLSR: |
| 861 | BT_ERR("TIOCSERGETLSR is not supported"); |
| 862 | return -ENOIOCTLCMD; |
| 863 | |
| 864 | case TIOCSERCONFIG: |
| 865 | BT_ERR("TIOCSERCONFIG is not supported"); |
| 866 | return -ENOIOCTLCMD; |
| 867 | |
| 868 | default: |
| 869 | return -ENOIOCTLCMD; /* ioctls which we must ignore */ |
| 870 | |
| 871 | } |
| 872 | |
| 873 | return -ENOIOCTLCMD; |
| 874 | } |
| 875 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 876 | static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | { |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 878 | struct ktermios *new = tty->termios; |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 879 | int old_baud_rate = tty_termios_baud_rate(old); |
| 880 | int new_baud_rate = tty_termios_baud_rate(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 882 | u8 baud, data_bits, stop_bits, parity, x_on, x_off; |
| 883 | u16 changes = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 885 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
| 886 | |
| 887 | BT_DBG("tty %p termios %p", tty, old); |
| 888 | |
Marcel Holtmann | ff2d367 | 2006-11-18 22:14:42 +0100 | [diff] [blame] | 889 | if (!dev || !dev->dlc || !dev->dlc->session) |
Marcel Holtmann | cb19d9e | 2006-10-15 17:31:10 +0200 | [diff] [blame] | 890 | return; |
| 891 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 892 | /* Handle turning off CRTSCTS */ |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 893 | if ((old->c_cflag & CRTSCTS) && !(new->c_cflag & CRTSCTS)) |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 894 | BT_DBG("Turning off CRTSCTS unsupported"); |
| 895 | |
| 896 | /* Parity on/off and when on, odd/even */ |
| 897 | if (((old->c_cflag & PARENB) != (new->c_cflag & PARENB)) || |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 898 | ((old->c_cflag & PARODD) != (new->c_cflag & PARODD))) { |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 899 | changes |= RFCOMM_RPN_PM_PARITY; |
| 900 | BT_DBG("Parity change detected."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | } |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 902 | |
| 903 | /* Mark and space parity are not supported! */ |
| 904 | if (new->c_cflag & PARENB) { |
| 905 | if (new->c_cflag & PARODD) { |
| 906 | BT_DBG("Parity is ODD"); |
| 907 | parity = RFCOMM_RPN_PARITY_ODD; |
| 908 | } else { |
| 909 | BT_DBG("Parity is EVEN"); |
| 910 | parity = RFCOMM_RPN_PARITY_EVEN; |
| 911 | } |
| 912 | } else { |
| 913 | BT_DBG("Parity is OFF"); |
| 914 | parity = RFCOMM_RPN_PARITY_NONE; |
| 915 | } |
| 916 | |
| 917 | /* Setting the x_on / x_off characters */ |
| 918 | if (old->c_cc[VSTOP] != new->c_cc[VSTOP]) { |
| 919 | BT_DBG("XOFF custom"); |
| 920 | x_on = new->c_cc[VSTOP]; |
| 921 | changes |= RFCOMM_RPN_PM_XON; |
| 922 | } else { |
| 923 | BT_DBG("XOFF default"); |
| 924 | x_on = RFCOMM_RPN_XON_CHAR; |
| 925 | } |
| 926 | |
| 927 | if (old->c_cc[VSTART] != new->c_cc[VSTART]) { |
| 928 | BT_DBG("XON custom"); |
| 929 | x_off = new->c_cc[VSTART]; |
| 930 | changes |= RFCOMM_RPN_PM_XOFF; |
| 931 | } else { |
| 932 | BT_DBG("XON default"); |
| 933 | x_off = RFCOMM_RPN_XOFF_CHAR; |
| 934 | } |
| 935 | |
| 936 | /* Handle setting of stop bits */ |
| 937 | if ((old->c_cflag & CSTOPB) != (new->c_cflag & CSTOPB)) |
| 938 | changes |= RFCOMM_RPN_PM_STOP; |
| 939 | |
| 940 | /* POSIX does not support 1.5 stop bits and RFCOMM does not |
| 941 | * support 2 stop bits. So a request for 2 stop bits gets |
| 942 | * translated to 1.5 stop bits */ |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 943 | if (new->c_cflag & CSTOPB) |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 944 | stop_bits = RFCOMM_RPN_STOP_15; |
Andrei Emeltchenko | 285b4e9 | 2010-12-01 16:58:23 +0200 | [diff] [blame] | 945 | else |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 946 | stop_bits = RFCOMM_RPN_STOP_1; |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 947 | |
| 948 | /* Handle number of data bits [5-8] */ |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 949 | if ((old->c_cflag & CSIZE) != (new->c_cflag & CSIZE)) |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 950 | changes |= RFCOMM_RPN_PM_DATA; |
| 951 | |
| 952 | switch (new->c_cflag & CSIZE) { |
| 953 | case CS5: |
| 954 | data_bits = RFCOMM_RPN_DATA_5; |
| 955 | break; |
| 956 | case CS6: |
| 957 | data_bits = RFCOMM_RPN_DATA_6; |
| 958 | break; |
| 959 | case CS7: |
| 960 | data_bits = RFCOMM_RPN_DATA_7; |
| 961 | break; |
| 962 | case CS8: |
| 963 | data_bits = RFCOMM_RPN_DATA_8; |
| 964 | break; |
| 965 | default: |
| 966 | data_bits = RFCOMM_RPN_DATA_8; |
| 967 | break; |
| 968 | } |
| 969 | |
| 970 | /* Handle baudrate settings */ |
| 971 | if (old_baud_rate != new_baud_rate) |
| 972 | changes |= RFCOMM_RPN_PM_BITRATE; |
| 973 | |
| 974 | switch (new_baud_rate) { |
| 975 | case 2400: |
| 976 | baud = RFCOMM_RPN_BR_2400; |
| 977 | break; |
| 978 | case 4800: |
| 979 | baud = RFCOMM_RPN_BR_4800; |
| 980 | break; |
| 981 | case 7200: |
| 982 | baud = RFCOMM_RPN_BR_7200; |
| 983 | break; |
| 984 | case 9600: |
| 985 | baud = RFCOMM_RPN_BR_9600; |
| 986 | break; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 987 | case 19200: |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 988 | baud = RFCOMM_RPN_BR_19200; |
| 989 | break; |
| 990 | case 38400: |
| 991 | baud = RFCOMM_RPN_BR_38400; |
| 992 | break; |
| 993 | case 57600: |
| 994 | baud = RFCOMM_RPN_BR_57600; |
| 995 | break; |
| 996 | case 115200: |
| 997 | baud = RFCOMM_RPN_BR_115200; |
| 998 | break; |
| 999 | case 230400: |
| 1000 | baud = RFCOMM_RPN_BR_230400; |
| 1001 | break; |
| 1002 | default: |
| 1003 | /* 9600 is standard accordinag to the RFCOMM specification */ |
| 1004 | baud = RFCOMM_RPN_BR_9600; |
| 1005 | break; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1006 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | if (changes) |
| 1010 | rfcomm_send_rpn(dev->dlc->session, 1, dev->dlc->dlci, baud, |
| 1011 | data_bits, stop_bits, parity, |
| 1012 | RFCOMM_RPN_FLOW_NONE, x_on, x_off, changes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | static void rfcomm_tty_throttle(struct tty_struct *tty) |
| 1016 | { |
| 1017 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
| 1018 | |
| 1019 | BT_DBG("tty %p dev %p", tty, dev); |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1020 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | rfcomm_dlc_throttle(dev->dlc); |
| 1022 | } |
| 1023 | |
| 1024 | static void rfcomm_tty_unthrottle(struct tty_struct *tty) |
| 1025 | { |
| 1026 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
| 1027 | |
| 1028 | BT_DBG("tty %p dev %p", tty, dev); |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1029 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | rfcomm_dlc_unthrottle(dev->dlc); |
| 1031 | } |
| 1032 | |
| 1033 | static int rfcomm_tty_chars_in_buffer(struct tty_struct *tty) |
| 1034 | { |
| 1035 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
| 1037 | BT_DBG("tty %p dev %p", tty, dev); |
| 1038 | |
Marcel Holtmann | b6e557f | 2007-01-08 02:16:27 +0100 | [diff] [blame] | 1039 | if (!dev || !dev->dlc) |
| 1040 | return 0; |
| 1041 | |
| 1042 | if (!skb_queue_empty(&dev->dlc->tx_queue)) |
| 1043 | return dev->dlc->mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
| 1045 | return 0; |
| 1046 | } |
| 1047 | |
| 1048 | static void rfcomm_tty_flush_buffer(struct tty_struct *tty) |
| 1049 | { |
| 1050 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
| 1052 | BT_DBG("tty %p dev %p", tty, dev); |
| 1053 | |
Marcel Holtmann | b6e557f | 2007-01-08 02:16:27 +0100 | [diff] [blame] | 1054 | if (!dev || !dev->dlc) |
| 1055 | return; |
| 1056 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | skb_queue_purge(&dev->dlc->tx_queue); |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 1058 | tty_wakeup(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
| 1060 | |
| 1061 | static void rfcomm_tty_send_xchar(struct tty_struct *tty, char ch) |
| 1062 | { |
| 1063 | BT_DBG("tty %p ch %c", tty, ch); |
| 1064 | } |
| 1065 | |
| 1066 | static void rfcomm_tty_wait_until_sent(struct tty_struct *tty, int timeout) |
| 1067 | { |
| 1068 | BT_DBG("tty %p timeout %d", tty, timeout); |
| 1069 | } |
| 1070 | |
| 1071 | static void rfcomm_tty_hangup(struct tty_struct *tty) |
| 1072 | { |
| 1073 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
| 1075 | BT_DBG("tty %p dev %p", tty, dev); |
| 1076 | |
Marcel Holtmann | b6e557f | 2007-01-08 02:16:27 +0100 | [diff] [blame] | 1077 | if (!dev) |
| 1078 | return; |
| 1079 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | rfcomm_tty_flush_buffer(tty); |
| 1081 | |
Marcel Holtmann | 77f2a45 | 2007-05-05 00:36:10 +0200 | [diff] [blame] | 1082 | if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) { |
| 1083 | if (rfcomm_dev_get(dev->id) == NULL) |
| 1084 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | rfcomm_dev_del(dev); |
Marcel Holtmann | 77f2a45 | 2007-05-05 00:36:10 +0200 | [diff] [blame] | 1086 | rfcomm_dev_put(dev); |
| 1087 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | } |
| 1089 | |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 1090 | static int rfcomm_tty_tiocmget(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1092 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | |
| 1094 | BT_DBG("tty %p dev %p", tty, dev); |
| 1095 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1096 | return dev->modem_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | } |
| 1098 | |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 1099 | static int rfcomm_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | { |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1101 | struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data; |
| 1102 | struct rfcomm_dlc *dlc = dev->dlc; |
| 1103 | u8 v24_sig; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | BT_DBG("tty %p dev %p set 0x%02x clear 0x%02x", tty, dev, set, clear); |
| 1106 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1107 | rfcomm_dlc_get_modem_status(dlc, &v24_sig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1109 | if (set & TIOCM_DSR || set & TIOCM_DTR) |
| 1110 | v24_sig |= RFCOMM_V24_RTC; |
| 1111 | if (set & TIOCM_RTS || set & TIOCM_CTS) |
| 1112 | v24_sig |= RFCOMM_V24_RTR; |
| 1113 | if (set & TIOCM_RI) |
| 1114 | v24_sig |= RFCOMM_V24_IC; |
| 1115 | if (set & TIOCM_CD) |
| 1116 | v24_sig |= RFCOMM_V24_DV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1118 | if (clear & TIOCM_DSR || clear & TIOCM_DTR) |
| 1119 | v24_sig &= ~RFCOMM_V24_RTC; |
| 1120 | if (clear & TIOCM_RTS || clear & TIOCM_CTS) |
| 1121 | v24_sig &= ~RFCOMM_V24_RTR; |
| 1122 | if (clear & TIOCM_RI) |
| 1123 | v24_sig &= ~RFCOMM_V24_IC; |
| 1124 | if (clear & TIOCM_CD) |
| 1125 | v24_sig &= ~RFCOMM_V24_DV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1127 | rfcomm_dlc_set_modem_status(dlc, v24_sig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | |
J. Suter | 3a5e903 | 2005-08-09 20:28:46 -0700 | [diff] [blame] | 1129 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | } |
| 1131 | |
| 1132 | /* ---- TTY structure ---- */ |
| 1133 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1134 | static const struct tty_operations rfcomm_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | .open = rfcomm_tty_open, |
| 1136 | .close = rfcomm_tty_close, |
| 1137 | .write = rfcomm_tty_write, |
| 1138 | .write_room = rfcomm_tty_write_room, |
| 1139 | .chars_in_buffer = rfcomm_tty_chars_in_buffer, |
| 1140 | .flush_buffer = rfcomm_tty_flush_buffer, |
| 1141 | .ioctl = rfcomm_tty_ioctl, |
| 1142 | .throttle = rfcomm_tty_throttle, |
| 1143 | .unthrottle = rfcomm_tty_unthrottle, |
| 1144 | .set_termios = rfcomm_tty_set_termios, |
| 1145 | .send_xchar = rfcomm_tty_send_xchar, |
| 1146 | .hangup = rfcomm_tty_hangup, |
| 1147 | .wait_until_sent = rfcomm_tty_wait_until_sent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | .tiocmget = rfcomm_tty_tiocmget, |
| 1149 | .tiocmset = rfcomm_tty_tiocmset, |
| 1150 | }; |
| 1151 | |
Gustavo F. Padovan | 2f8362a | 2010-07-24 02:04:45 -0300 | [diff] [blame] | 1152 | int __init rfcomm_init_ttys(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | { |
David Herrmann | 5ada991 | 2011-10-24 15:30:57 +0200 | [diff] [blame] | 1154 | int error; |
| 1155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | rfcomm_tty_driver = alloc_tty_driver(RFCOMM_TTY_PORTS); |
| 1157 | if (!rfcomm_tty_driver) |
David Herrmann | 5ada991 | 2011-10-24 15:30:57 +0200 | [diff] [blame] | 1158 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | rfcomm_tty_driver->driver_name = "rfcomm"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | rfcomm_tty_driver->name = "rfcomm"; |
| 1162 | rfcomm_tty_driver->major = RFCOMM_TTY_MAJOR; |
| 1163 | rfcomm_tty_driver->minor_start = RFCOMM_TTY_MINOR; |
| 1164 | rfcomm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 1165 | rfcomm_tty_driver->subtype = SERIAL_TYPE_NORMAL; |
Greg Kroah-Hartman | 331b831 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1166 | rfcomm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | rfcomm_tty_driver->init_termios = tty_std_termios; |
| 1168 | rfcomm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
Marcel Holtmann | ca37bdd | 2008-07-14 20:13:52 +0200 | [diff] [blame] | 1169 | rfcomm_tty_driver->init_termios.c_lflag &= ~ICANON; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | tty_set_operations(rfcomm_tty_driver, &rfcomm_ops); |
| 1171 | |
David Herrmann | 5ada991 | 2011-10-24 15:30:57 +0200 | [diff] [blame] | 1172 | error = tty_register_driver(rfcomm_tty_driver); |
| 1173 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | BT_ERR("Can't register RFCOMM TTY driver"); |
| 1175 | put_tty_driver(rfcomm_tty_driver); |
David Herrmann | 5ada991 | 2011-10-24 15:30:57 +0200 | [diff] [blame] | 1176 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
| 1179 | BT_INFO("RFCOMM TTY layer initialized"); |
| 1180 | |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
Gustavo F. Padovan | 28e9509 | 2010-07-31 19:57:05 -0300 | [diff] [blame] | 1184 | void rfcomm_cleanup_ttys(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | { |
| 1186 | tty_unregister_driver(rfcomm_tty_driver); |
| 1187 | put_tty_driver(rfcomm_tty_driver); |
| 1188 | } |