Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * USB Serial Converter driver |
| 3 | * |
Greg Kroah-Hartman | 502b95c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 4 | * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
| 6 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License version |
| 10 | * 2 as published by the Free Software Foundation. |
| 11 | * |
Greg Kroah-Hartman | 502b95c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 12 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * based on a driver by Brad Keryan) |
| 14 | * |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 15 | * See Documentation/usb/usb-serial.txt for more information on using this |
| 16 | * driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | */ |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/kernel.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/tty.h> |
| 25 | #include <linux/tty_driver.h> |
| 26 | #include <linux/tty_flip.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/moduleparam.h> |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 29 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/spinlock.h> |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 31 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/list.h> |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 33 | #include <linux/uaccess.h> |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 34 | #include <linux/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 36 | #include <linux/usb/serial.h> |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 37 | #include <linux/kfifo.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "pl2303.h" |
| 39 | |
| 40 | /* |
| 41 | * Version Information |
| 42 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
| 44 | #define DRIVER_DESC "USB Serial Driver core" |
| 45 | |
| 46 | /* Driver structure we register with the USB core */ |
| 47 | static struct usb_driver usb_serial_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | .name = "usbserial", |
| 49 | .probe = usb_serial_probe, |
| 50 | .disconnect = usb_serial_disconnect, |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 51 | .suspend = usb_serial_suspend, |
| 52 | .resume = usb_serial_resume, |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 53 | .no_dynamic_id = 1, |
Alan Stern | abf0318 | 2010-11-29 10:17:22 -0500 | [diff] [blame] | 54 | .supports_autosuspend = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | }; |
| 56 | |
| 57 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead |
| 58 | the MODULE_DEVICE_TABLE declarations in each serial driver |
| 59 | cause the "hotplug" program to pull in whatever module is necessary |
| 60 | via modprobe, and modprobe will load usbserial because the serial |
| 61 | drivers depend on it. |
| 62 | */ |
| 63 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 64 | static bool debug; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 65 | /* initially all NULL */ |
| 66 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 67 | static DEFINE_MUTEX(table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static LIST_HEAD(usb_serial_driver_list); |
| 69 | |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 70 | /* |
| 71 | * Look up the serial structure. If it is found and it hasn't been |
| 72 | * disconnected, return with its disc_mutex held and its refcount |
| 73 | * incremented. Otherwise return NULL. |
| 74 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | struct usb_serial *usb_serial_get_by_index(unsigned index) |
| 76 | { |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 77 | struct usb_serial *serial; |
| 78 | |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 79 | mutex_lock(&table_lock); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 80 | serial = serial_table[index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 82 | if (serial) { |
| 83 | mutex_lock(&serial->disc_mutex); |
| 84 | if (serial->disconnected) { |
| 85 | mutex_unlock(&serial->disc_mutex); |
| 86 | serial = NULL; |
| 87 | } else { |
| 88 | kref_get(&serial->kref); |
| 89 | } |
| 90 | } |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 91 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | return serial; |
| 93 | } |
| 94 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 95 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
| 96 | int num_ports, unsigned int *minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | { |
| 98 | unsigned int i, j; |
| 99 | int good_spot; |
| 100 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 101 | dbg("%s %d", __func__, num_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
| 103 | *minor = 0; |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 104 | mutex_lock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
| 106 | if (serial_table[i]) |
| 107 | continue; |
| 108 | |
| 109 | good_spot = 1; |
| 110 | for (j = 1; j <= num_ports-1; ++j) |
| 111 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { |
| 112 | good_spot = 0; |
| 113 | i += j; |
| 114 | break; |
| 115 | } |
| 116 | if (good_spot == 0) |
| 117 | continue; |
| 118 | |
| 119 | *minor = i; |
Oliver Neukum | a1f721c | 2007-03-05 15:23:51 +0100 | [diff] [blame] | 120 | j = 0; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 121 | dbg("%s - minor base = %d", __func__, *minor); |
Oliver Neukum | a1f721c | 2007-03-05 15:23:51 +0100 | [diff] [blame] | 122 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | serial_table[i] = serial; |
Oliver Neukum | a1f721c | 2007-03-05 15:23:51 +0100 | [diff] [blame] | 124 | serial->port[j++]->number = i; |
| 125 | } |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 126 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | return serial; |
| 128 | } |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 129 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | return NULL; |
| 131 | } |
| 132 | |
| 133 | static void return_serial(struct usb_serial *serial) |
| 134 | { |
| 135 | int i; |
| 136 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 137 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 139 | mutex_lock(&table_lock); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 140 | for (i = 0; i < serial->num_ports; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | serial_table[serial->minor + i] = NULL; |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 142 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | static void destroy_serial(struct kref *kref) |
| 146 | { |
| 147 | struct usb_serial *serial; |
| 148 | struct usb_serial_port *port; |
| 149 | int i; |
| 150 | |
| 151 | serial = to_usb_serial(kref); |
| 152 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 153 | dbg("%s - %s", __func__, serial->type->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Jim Radford | 521b85a | 2007-03-13 08:30:50 -0700 | [diff] [blame] | 155 | /* return the minor range that this device had */ |
Alan Stern | 0282b7f | 2008-07-29 12:01:04 -0400 | [diff] [blame] | 156 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
| 157 | return_serial(serial); |
Jim Radford | 521b85a | 2007-03-13 08:30:50 -0700 | [diff] [blame] | 158 | |
Alan Stern | a4720c6 | 2009-10-09 12:43:12 -0400 | [diff] [blame] | 159 | if (serial->attached) |
| 160 | serial->type->release(serial); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 161 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 162 | /* Now that nothing is using the ports, they can be freed */ |
| 163 | for (i = 0; i < serial->num_port_pointers; ++i) { |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 164 | port = serial->port[i]; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 165 | if (port) { |
| 166 | port->serial = NULL; |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 167 | put_device(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | } |
| 170 | |
| 171 | usb_put_dev(serial->dev); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 172 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
| 174 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 175 | void usb_serial_put(struct usb_serial *serial) |
| 176 | { |
| 177 | kref_put(&serial->kref, destroy_serial); |
| 178 | } |
| 179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | /***************************************************************************** |
| 181 | * Driver tty interface functions |
| 182 | *****************************************************************************/ |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 183 | |
| 184 | /** |
| 185 | * serial_install - install tty |
| 186 | * @driver: the driver (USB in our case) |
| 187 | * @tty: the tty being created |
| 188 | * |
| 189 | * Create the termios objects for this tty. We use the default |
| 190 | * USB serial settings but permit them to be overridden by |
| 191 | * serial->type->init_termios. |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 192 | * |
| 193 | * This is the first place a new tty gets used. Hence this is where we |
| 194 | * acquire references to the usb_serial structure and the driver module, |
| 195 | * where we store a pointer to the port, and where we do an autoresume. |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame] | 196 | * All these actions are reversed in serial_cleanup(). |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 197 | */ |
| 198 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) |
| 199 | { |
| 200 | int idx = tty->index; |
| 201 | struct usb_serial *serial; |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 202 | struct usb_serial_port *port; |
| 203 | int retval = -ENODEV; |
| 204 | |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 205 | dbg("%s", __func__); |
| 206 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 207 | serial = usb_serial_get_by_index(idx); |
| 208 | if (!serial) |
| 209 | return retval; |
| 210 | |
| 211 | port = serial->port[idx - serial->minor]; |
| 212 | if (!port) |
| 213 | goto error_no_port; |
| 214 | if (!try_module_get(serial->type->driver.owner)) |
| 215 | goto error_module_get; |
| 216 | |
| 217 | retval = usb_autopm_get_interface(serial->interface); |
| 218 | if (retval) |
| 219 | goto error_get_interface; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 220 | |
Jiri Slaby | 76f82a7 | 2012-01-30 21:14:29 +0100 | [diff] [blame] | 221 | retval = tty_standard_install(driver, tty); |
| 222 | if (retval) |
| 223 | goto error_init_termios; |
| 224 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 225 | mutex_unlock(&serial->disc_mutex); |
| 226 | |
Alan Stern | 7e29bb4 | 2009-09-01 11:39:22 -0400 | [diff] [blame] | 227 | /* allow the driver to update the settings */ |
| 228 | if (serial->type->init_termios) |
| 229 | serial->type->init_termios(tty); |
| 230 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 231 | tty->driver_data = port; |
| 232 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 233 | return retval; |
| 234 | |
Alan Stern | 7e29bb4 | 2009-09-01 11:39:22 -0400 | [diff] [blame] | 235 | error_init_termios: |
Jiri Slaby | 76f82a7 | 2012-01-30 21:14:29 +0100 | [diff] [blame] | 236 | usb_autopm_put_interface(serial->interface); |
| 237 | error_get_interface: |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 238 | module_put(serial->type->driver.owner); |
| 239 | error_module_get: |
| 240 | error_no_port: |
| 241 | usb_serial_put(serial); |
| 242 | mutex_unlock(&serial->disc_mutex); |
| 243 | return retval; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 244 | } |
| 245 | |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 246 | static int serial_activate(struct tty_port *tport, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 248 | struct usb_serial_port *port = |
| 249 | container_of(tport, struct usb_serial_port, port); |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 250 | struct usb_serial *serial = port->serial; |
| 251 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 253 | mutex_lock(&serial->disc_mutex); |
| 254 | if (serial->disconnected) |
| 255 | retval = -ENODEV; |
| 256 | else |
| 257 | retval = port->serial->type->open(tty, port); |
| 258 | mutex_unlock(&serial->disc_mutex); |
Johan Hovold | 3827d87 | 2011-11-10 17:38:13 +0100 | [diff] [blame] | 259 | |
| 260 | if (retval < 0) |
| 261 | retval = usb_translate_errors(retval); |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return retval; |
| 264 | } |
| 265 | |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 266 | static int serial_open(struct tty_struct *tty, struct file *filp) |
| 267 | { |
| 268 | struct usb_serial_port *port = tty->driver_data; |
| 269 | |
| 270 | dbg("%s - port %d", __func__, port->number); |
| 271 | return tty_port_open(&port->port, tty, filp); |
| 272 | } |
| 273 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 274 | /** |
Alan Stern | 7455612 | 2009-09-01 11:39:40 -0400 | [diff] [blame] | 275 | * serial_down - shut down hardware |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 276 | * @tport: tty port to shut down |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 277 | * |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 278 | * Shut down a USB serial port unless it is the console. We never |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 279 | * shut down the console hardware as it will always be in use. Serialized |
| 280 | * against activate by the tport mutex and kept to matching open/close pairs |
| 281 | * of calls by the ASYNCB_INITIALIZED flag. |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 282 | */ |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 283 | static void serial_down(struct tty_port *tport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | { |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 285 | struct usb_serial_port *port = |
| 286 | container_of(tport, struct usb_serial_port, port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 287 | struct usb_serial_driver *drv = port->serial->type; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 288 | /* |
| 289 | * The console is magical. Do not hang up the console hardware |
| 290 | * or there will be tears. |
| 291 | */ |
Jason Wessel | bd5afa9 | 2010-03-08 21:50:12 -0600 | [diff] [blame] | 292 | if (port->port.console) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | return; |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 294 | if (drv->close) |
| 295 | drv->close(port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 296 | } |
| 297 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 298 | static void serial_hangup(struct tty_struct *tty) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 299 | { |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 300 | struct usb_serial_port *port = tty->driver_data; |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 301 | dbg("%s - port %d", __func__, port->number); |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 302 | tty_port_hangup(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | static void serial_close(struct tty_struct *tty, struct file *filp) |
| 306 | { |
| 307 | struct usb_serial_port *port = tty->driver_data; |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 308 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 309 | tty_port_close(&port->port, tty, filp); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 310 | } |
| 311 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 312 | /** |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame] | 313 | * serial_cleanup - free resources post close/hangup |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 314 | * @port: port to free up |
| 315 | * |
| 316 | * Do the resource freeing and refcount dropping for the port. |
| 317 | * Avoid freeing the console. |
| 318 | * |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame] | 319 | * Called asynchronously after the last tty kref is dropped, |
| 320 | * and the tty layer has already done the tty_shutdown(tty); |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 321 | */ |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame] | 322 | static void serial_cleanup(struct tty_struct *tty) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 323 | { |
| 324 | struct usb_serial_port *port = tty->driver_data; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 325 | struct usb_serial *serial; |
| 326 | struct module *owner; |
| 327 | |
| 328 | /* The console is magical. Do not hang up the console hardware |
| 329 | * or there will be tears. |
| 330 | */ |
Jason Wessel | bd5afa9 | 2010-03-08 21:50:12 -0600 | [diff] [blame] | 331 | if (port->port.console) |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 332 | return; |
| 333 | |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 334 | dbg("%s - port %d", __func__, port->number); |
| 335 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 336 | tty->driver_data = NULL; |
| 337 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 338 | serial = port->serial; |
| 339 | owner = serial->type->driver.owner; |
| 340 | |
| 341 | mutex_lock(&serial->disc_mutex); |
| 342 | if (!serial->disconnected) |
| 343 | usb_autopm_put_interface(serial->interface); |
| 344 | mutex_unlock(&serial->disc_mutex); |
| 345 | |
| 346 | usb_serial_put(serial); |
| 347 | module_put(owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 350 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
| 351 | int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 353 | struct usb_serial_port *port = tty->driver_data; |
Oliver Neukum | 3ff4fd9 | 2007-01-13 07:32:27 +0100 | [diff] [blame] | 354 | int retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 356 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
Luiz Fernando Capitulino | 487f9c6 | 2005-11-28 19:16:05 -0200 | [diff] [blame] | 357 | goto exit; |
| 358 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 359 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 362 | retval = port->serial->type->write(tty, port, buf, count); |
Johan Hovold | c6249ff | 2011-11-10 17:40:44 +0100 | [diff] [blame] | 363 | if (retval < 0) |
| 364 | retval = usb_translate_errors(retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | exit: |
| 366 | return retval; |
| 367 | } |
| 368 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 369 | static int serial_write_room(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 371 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 372 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 374 | return port->serial->type->write_room(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 377 | static int serial_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 379 | struct usb_serial_port *port = tty->driver_data; |
Johan Hovold | b4fc2ae | 2009-11-22 17:42:34 +0100 | [diff] [blame] | 380 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Alan Cox | eff6937 | 2009-01-02 13:47:06 +0000 | [diff] [blame] | 382 | /* if the device was unplugged then any remaining characters |
| 383 | fell out of the connector ;) */ |
| 384 | if (port->serial->disconnected) |
| 385 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 387 | return port->serial->type->chars_in_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 390 | static void serial_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 392 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 393 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | /* pass on to the driver specific version of this function */ |
| 396 | if (port->serial->type->throttle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 397 | port->serial->type->throttle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 400 | static void serial_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 402 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 403 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | /* pass on to the driver specific version of this function */ |
| 406 | if (port->serial->type->unthrottle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 407 | port->serial->type->unthrottle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 410 | static int serial_ioctl(struct tty_struct *tty, |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 411 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 413 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | int retval = -ENODEV; |
| 415 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 416 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 418 | /* pass on to the driver specific version of this function |
| 419 | if it is available */ |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 420 | if (port->serial->type->ioctl) { |
Alan Cox | 00a0d0d | 2011-02-14 16:27:06 +0000 | [diff] [blame] | 421 | retval = port->serial->type->ioctl(tty, cmd, arg); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 422 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | retval = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return retval; |
| 425 | } |
| 426 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 427 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 429 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 430 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 432 | /* pass on to the driver specific version of this function |
| 433 | if it is available */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | if (port->serial->type->set_termios) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 435 | port->serial->type->set_termios(tty, port, old); |
Alan Cox | 3378509 | 2007-10-18 01:24:22 -0700 | [diff] [blame] | 436 | else |
| 437 | tty_termios_copy_hw(tty->termios, old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 440 | static int serial_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 442 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 444 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 446 | /* pass on to the driver specific version of this function |
| 447 | if it is available */ |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 448 | if (port->serial->type->break_ctl) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 449 | port->serial->type->break_ctl(tty, break_state); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 450 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 453 | static int serial_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | { |
| 455 | struct usb_serial *serial; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | char tmp[40]; |
| 458 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 459 | dbg("%s", __func__); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 460 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
| 461 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | serial = usb_serial_get_by_index(i); |
| 463 | if (serial == NULL) |
| 464 | continue; |
| 465 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 466 | seq_printf(m, "%d:", i); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 467 | if (serial->type->driver.owner) |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 468 | seq_printf(m, " module:%s", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 469 | module_name(serial->type->driver.owner)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 470 | seq_printf(m, " name:\"%s\"", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 471 | serial->type->description); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 472 | seq_printf(m, " vendor:%04x product:%04x", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 473 | le16_to_cpu(serial->dev->descriptor.idVendor), |
| 474 | le16_to_cpu(serial->dev->descriptor.idProduct)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 475 | seq_printf(m, " num_ports:%d", serial->num_ports); |
| 476 | seq_printf(m, " port:%d", i - serial->minor + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 478 | seq_printf(m, " path:%s", tmp); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 479 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 480 | seq_putc(m, '\n'); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 481 | usb_serial_put(serial); |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 482 | mutex_unlock(&serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | } |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 484 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } |
| 486 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 487 | static int serial_proc_open(struct inode *inode, struct file *file) |
| 488 | { |
| 489 | return single_open(file, serial_proc_show, NULL); |
| 490 | } |
| 491 | |
| 492 | static const struct file_operations serial_proc_fops = { |
| 493 | .owner = THIS_MODULE, |
| 494 | .open = serial_proc_open, |
| 495 | .read = seq_read, |
| 496 | .llseek = seq_lseek, |
| 497 | .release = single_release, |
| 498 | }; |
| 499 | |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 500 | static int serial_tiocmget(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 502 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 504 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | if (port->serial->type->tiocmget) |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 507 | return port->serial->type->tiocmget(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | return -EINVAL; |
| 509 | } |
| 510 | |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 511 | static int serial_tiocmset(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | unsigned int set, unsigned int clear) |
| 513 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 514 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 516 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | if (port->serial->type->tiocmset) |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 519 | return port->serial->type->tiocmset(tty, set, clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | return -EINVAL; |
| 521 | } |
| 522 | |
Alan Cox | d281da7 | 2010-09-16 18:21:24 +0100 | [diff] [blame] | 523 | static int serial_get_icount(struct tty_struct *tty, |
| 524 | struct serial_icounter_struct *icount) |
| 525 | { |
| 526 | struct usb_serial_port *port = tty->driver_data; |
| 527 | |
| 528 | dbg("%s - port %d", __func__, port->number); |
| 529 | |
| 530 | if (port->serial->type->get_icount) |
| 531 | return port->serial->type->get_icount(tty, icount); |
| 532 | return -EINVAL; |
| 533 | } |
| 534 | |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 535 | /* |
| 536 | * We would be calling tty_wakeup here, but unfortunately some line |
| 537 | * disciplines have an annoying habit of calling tty->write from |
| 538 | * the write wakeup callback (e.g. n_hdlc.c). |
| 539 | */ |
| 540 | void usb_serial_port_softint(struct usb_serial_port *port) |
| 541 | { |
| 542 | schedule_work(&port->work); |
| 543 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 544 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 545 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 546 | static void usb_serial_port_work(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 548 | struct usb_serial_port *port = |
| 549 | container_of(work, struct usb_serial_port, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | struct tty_struct *tty; |
| 551 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 552 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 553 | |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 554 | tty = tty_port_tty_get(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | if (!tty) |
| 556 | return; |
| 557 | |
| 558 | tty_wakeup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 559 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
| 561 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 562 | static void kill_traffic(struct usb_serial_port *port) |
Pete Zaitcev | 34f8e76 | 2006-06-21 15:00:45 -0700 | [diff] [blame] | 563 | { |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 564 | int i; |
| 565 | |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 566 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
| 567 | usb_kill_urb(port->read_urbs[i]); |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 568 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
| 569 | usb_kill_urb(port->write_urbs[i]); |
Oliver Neukum | 5adceac | 2007-08-17 14:01:38 +0200 | [diff] [blame] | 570 | /* |
| 571 | * This is tricky. |
| 572 | * Some drivers submit the read_urb in the |
| 573 | * handler for the write_urb or vice versa |
| 574 | * this order determines the order in which |
| 575 | * usb_kill_urb() must be used to reliably |
| 576 | * kill the URBs. As it is unknown here, |
| 577 | * both orders must be used in turn. |
| 578 | * The call below is not redundant. |
| 579 | */ |
| 580 | usb_kill_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | usb_kill_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | usb_kill_urb(port->interrupt_out_urb); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 583 | } |
| 584 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 585 | static void port_release(struct device *dev) |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 586 | { |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 587 | struct usb_serial_port *port = to_usb_serial_port(dev); |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 588 | int i; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 589 | |
| 590 | dbg ("%s - %s", __func__, dev_name(dev)); |
| 591 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 592 | /* |
| 593 | * Stop all the traffic before cancelling the work, so that |
| 594 | * nobody will restart it by calling usb_serial_port_softint. |
| 595 | */ |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 596 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 597 | cancel_work_sync(&port->work); |
| 598 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 599 | usb_free_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | usb_free_urb(port->interrupt_out_urb); |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 601 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
| 602 | usb_free_urb(port->read_urbs[i]); |
| 603 | kfree(port->bulk_in_buffers[i]); |
| 604 | } |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 605 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { |
| 606 | usb_free_urb(port->write_urbs[i]); |
| 607 | kfree(port->bulk_out_buffers[i]); |
| 608 | } |
Stefani Seibold | 119eecc | 2009-12-23 09:10:48 +0100 | [diff] [blame] | 609 | kfifo_free(&port->write_fifo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | kfree(port->interrupt_in_buffer); |
| 611 | kfree(port->interrupt_out_buffer); |
| 612 | kfree(port); |
| 613 | } |
| 614 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 615 | static struct usb_serial *create_serial(struct usb_device *dev, |
| 616 | struct usb_interface *interface, |
| 617 | struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
| 619 | struct usb_serial *serial; |
| 620 | |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 621 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | if (!serial) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 623 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | return NULL; |
| 625 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | serial->dev = usb_get_dev(dev); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 627 | serial->type = driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | serial->interface = interface; |
| 629 | kref_init(&serial->kref); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 630 | mutex_init(&serial->disc_mutex); |
Alan Stern | 0282b7f | 2008-07-29 12:01:04 -0400 | [diff] [blame] | 631 | serial->minor = SERIAL_TTY_NO_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
| 633 | return serial; |
| 634 | } |
| 635 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 636 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 637 | struct usb_serial_driver *drv) |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 638 | { |
| 639 | struct usb_dynid *dynid; |
| 640 | |
| 641 | spin_lock(&drv->dynids.lock); |
| 642 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 643 | if (usb_match_one_id(intf, &dynid->id)) { |
| 644 | spin_unlock(&drv->dynids.lock); |
| 645 | return &dynid->id; |
| 646 | } |
| 647 | } |
| 648 | spin_unlock(&drv->dynids.lock); |
| 649 | return NULL; |
| 650 | } |
| 651 | |
| 652 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, |
| 653 | struct usb_interface *intf) |
| 654 | { |
| 655 | const struct usb_device_id *id; |
| 656 | |
| 657 | id = usb_match_id(intf, drv->id_table); |
| 658 | if (id) { |
| 659 | dbg("static descriptor matches"); |
| 660 | goto exit; |
| 661 | } |
| 662 | id = match_dynamic_id(intf, drv); |
| 663 | if (id) |
| 664 | dbg("dynamic descriptor matches"); |
| 665 | exit: |
| 666 | return id; |
| 667 | } |
| 668 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 669 | /* Caller must hold table_lock */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 670 | static struct usb_serial_driver *search_serial_device( |
| 671 | struct usb_interface *iface) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | const struct usb_device_id *id; |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 674 | struct usb_serial_driver *drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
Adrian Bunk | 93b1fae | 2006-01-10 00:13:33 +0100 | [diff] [blame] | 676 | /* Check if the usb id matches a known device */ |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 677 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
| 678 | id = get_iface_id(drv, iface); |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 679 | if (id) |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 680 | return drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | } |
| 682 | |
| 683 | return NULL; |
| 684 | } |
| 685 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 686 | static int serial_carrier_raised(struct tty_port *port) |
| 687 | { |
| 688 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 689 | struct usb_serial_driver *drv = p->serial->type; |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 690 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 691 | if (drv->carrier_raised) |
| 692 | return drv->carrier_raised(p); |
| 693 | /* No carrier control - don't block */ |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 694 | return 1; |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | static void serial_dtr_rts(struct tty_port *port, int on) |
| 698 | { |
| 699 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 700 | struct usb_serial_driver *drv = p->serial->type; |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 701 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 702 | if (drv->dtr_rts) |
| 703 | drv->dtr_rts(p, on); |
| 704 | } |
| 705 | |
| 706 | static const struct tty_port_operations serial_port_ops = { |
| 707 | .carrier_raised = serial_carrier_raised, |
| 708 | .dtr_rts = serial_dtr_rts, |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 709 | .activate = serial_activate, |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 710 | .shutdown = serial_down, |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 711 | }; |
| 712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | int usb_serial_probe(struct usb_interface *interface, |
| 714 | const struct usb_device_id *id) |
| 715 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 716 | struct usb_device *dev = interface_to_usbdev(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | struct usb_serial *serial = NULL; |
| 718 | struct usb_serial_port *port; |
| 719 | struct usb_host_interface *iface_desc; |
| 720 | struct usb_endpoint_descriptor *endpoint; |
| 721 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; |
| 722 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; |
| 723 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; |
| 724 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 725 | struct usb_serial_driver *type = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | int retval; |
Andre Haupt | dd9ca5d | 2008-06-18 15:56:00 +0200 | [diff] [blame] | 727 | unsigned int minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | int buffer_size; |
| 729 | int i; |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 730 | int j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | int num_interrupt_in = 0; |
| 732 | int num_interrupt_out = 0; |
| 733 | int num_bulk_in = 0; |
| 734 | int num_bulk_out = 0; |
| 735 | int num_ports = 0; |
| 736 | int max_endpoints; |
| 737 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 738 | mutex_lock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | type = search_serial_device(interface); |
| 740 | if (!type) { |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 741 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | dbg("none matched"); |
| 743 | return -ENODEV; |
| 744 | } |
| 745 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 746 | if (!try_module_get(type->driver.owner)) { |
| 747 | mutex_unlock(&table_lock); |
| 748 | dev_err(&interface->dev, "module get failed, exiting\n"); |
| 749 | return -EIO; |
| 750 | } |
| 751 | mutex_unlock(&table_lock); |
| 752 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 753 | serial = create_serial(dev, interface, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | if (!serial) { |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 755 | module_put(type->driver.owner); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 756 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | return -ENOMEM; |
| 758 | } |
| 759 | |
| 760 | /* if this device type has a probe function, call it */ |
| 761 | if (type->probe) { |
| 762 | const struct usb_device_id *id; |
| 763 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 764 | id = get_iface_id(type, interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | retval = type->probe(serial, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
| 767 | if (retval) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 768 | dbg("sub driver rejected device"); |
| 769 | kfree(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 770 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | return retval; |
| 772 | } |
| 773 | } |
| 774 | |
| 775 | /* descriptor matches, let's find the endpoints needed */ |
| 776 | /* check out the endpoints */ |
| 777 | iface_desc = interface->cur_altsetting; |
| 778 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 779 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 780 | |
| 781 | if (usb_endpoint_is_bulk_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | /* we found a bulk in endpoint */ |
| 783 | dbg("found bulk in on endpoint %d", i); |
| 784 | bulk_in_endpoint[num_bulk_in] = endpoint; |
| 785 | ++num_bulk_in; |
| 786 | } |
| 787 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 788 | if (usb_endpoint_is_bulk_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | /* we found a bulk out endpoint */ |
| 790 | dbg("found bulk out on endpoint %d", i); |
| 791 | bulk_out_endpoint[num_bulk_out] = endpoint; |
| 792 | ++num_bulk_out; |
| 793 | } |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 794 | |
| 795 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | /* we found a interrupt in endpoint */ |
| 797 | dbg("found interrupt in on endpoint %d", i); |
| 798 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 799 | ++num_interrupt_in; |
| 800 | } |
| 801 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 802 | if (usb_endpoint_is_int_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | /* we found an interrupt out endpoint */ |
| 804 | dbg("found interrupt out on endpoint %d", i); |
| 805 | interrupt_out_endpoint[num_interrupt_out] = endpoint; |
| 806 | ++num_interrupt_out; |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 811 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | /* this is needed due to the looney way its endpoints are set up */ |
| 813 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && |
| 814 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || |
| 815 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && |
Johannes Steingraeber | 8fd8013 | 2006-09-16 16:17:34 +0200 | [diff] [blame] | 816 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
| 817 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && |
Andreas Bombe | ce816cf | 2008-09-14 01:58:55 +0200 | [diff] [blame] | 818 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
| 819 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && |
| 820 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | if (interface != dev->actconfig->interface[0]) { |
| 822 | /* check out the endpoints of the other interface*/ |
| 823 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; |
| 824 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 825 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 826 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | /* we found a interrupt in endpoint */ |
| 828 | dbg("found interrupt in for Prolific device on separate interface"); |
| 829 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 830 | ++num_interrupt_in; |
| 831 | } |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | /* Now make sure the PL-2303 is configured correctly. |
| 836 | * If not, give up now and hope this hack will work |
| 837 | * properly during a later invocation of usb_serial_probe |
| 838 | */ |
| 839 | if (num_bulk_in == 0 || num_bulk_out == 0) { |
| 840 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 841 | kfree(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 842 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | return -ENODEV; |
| 844 | } |
| 845 | } |
| 846 | /* END HORRIBLE HACK FOR PL2303 */ |
| 847 | #endif |
| 848 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | #ifdef CONFIG_USB_SERIAL_GENERIC |
| 850 | if (type == &usb_serial_generic_device) { |
| 851 | num_ports = num_bulk_out; |
| 852 | if (num_ports == 0) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 853 | dev_err(&interface->dev, |
| 854 | "Generic device with no bulk out, not allowed.\n"); |
| 855 | kfree(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 856 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | return -EIO; |
| 858 | } |
| 859 | } |
| 860 | #endif |
| 861 | if (!num_ports) { |
| 862 | /* if this device type has a calc_num_ports function, call it */ |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 863 | if (type->calc_num_ports) |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 864 | num_ports = type->calc_num_ports(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | if (!num_ports) |
| 866 | num_ports = type->num_ports; |
| 867 | } |
| 868 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | serial->num_ports = num_ports; |
| 870 | serial->num_bulk_in = num_bulk_in; |
| 871 | serial->num_bulk_out = num_bulk_out; |
| 872 | serial->num_interrupt_in = num_interrupt_in; |
| 873 | serial->num_interrupt_out = num_interrupt_out; |
| 874 | |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 875 | /* found all that we need */ |
| 876 | dev_info(&interface->dev, "%s converter detected\n", |
| 877 | type->description); |
| 878 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | /* create our ports, we need as many as the max endpoints */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 880 | /* we don't use num_ports here because some devices have more |
| 881 | endpoint pairs than ports */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | max_endpoints = max(num_bulk_in, num_bulk_out); |
| 883 | max_endpoints = max(max_endpoints, num_interrupt_in); |
| 884 | max_endpoints = max(max_endpoints, num_interrupt_out); |
| 885 | max_endpoints = max(max_endpoints, (int)serial->num_ports); |
| 886 | serial->num_port_pointers = max_endpoints; |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 887 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 888 | dbg("%s - setting up %d port structures for this device", |
| 889 | __func__, max_endpoints); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | for (i = 0; i < max_endpoints; ++i) { |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 891 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | if (!port) |
| 893 | goto probe_error; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 894 | tty_port_init(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 895 | port->port.ops = &serial_port_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | port->serial = serial; |
Greg Kroah-Hartman | 507ca9b | 2005-04-23 12:49:16 -0700 | [diff] [blame] | 897 | spin_lock_init(&port->lock); |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 898 | /* Keep this for private driver use for the moment but |
| 899 | should probably go away */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 900 | INIT_WORK(&port->work, usb_serial_port_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | serial->port[i] = port; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 902 | port->dev.parent = &interface->dev; |
| 903 | port->dev.driver = NULL; |
| 904 | port->dev.bus = &usb_serial_bus_type; |
| 905 | port->dev.release = &port_release; |
| 906 | device_initialize(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | /* set up the endpoint information */ |
| 910 | for (i = 0; i < num_bulk_in; ++i) { |
| 911 | endpoint = bulk_in_endpoint[i]; |
| 912 | port = serial->port[i]; |
Alan Stern | 969e303 | 2011-02-23 15:28:18 -0500 | [diff] [blame] | 913 | buffer_size = max_t(int, serial->type->bulk_in_size, |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 914 | usb_endpoint_maxp(endpoint)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | port->bulk_in_size = buffer_size; |
| 916 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 917 | |
| 918 | for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) { |
| 919 | set_bit(j, &port->read_urbs_free); |
| 920 | port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); |
| 921 | if (!port->read_urbs[j]) { |
| 922 | dev_err(&interface->dev, |
| 923 | "No free urbs available\n"); |
| 924 | goto probe_error; |
| 925 | } |
| 926 | port->bulk_in_buffers[j] = kmalloc(buffer_size, |
| 927 | GFP_KERNEL); |
| 928 | if (!port->bulk_in_buffers[j]) { |
| 929 | dev_err(&interface->dev, |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 930 | "Couldn't allocate bulk_in_buffer\n"); |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 931 | goto probe_error; |
| 932 | } |
| 933 | usb_fill_bulk_urb(port->read_urbs[j], dev, |
| 934 | usb_rcvbulkpipe(dev, |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 935 | endpoint->bEndpointAddress), |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 936 | port->bulk_in_buffers[j], buffer_size, |
| 937 | serial->type->read_bulk_callback, |
| 938 | port); |
| 939 | } |
| 940 | |
| 941 | port->read_urb = port->read_urbs[0]; |
| 942 | port->bulk_in_buffer = port->bulk_in_buffers[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | for (i = 0; i < num_bulk_out; ++i) { |
| 946 | endpoint = bulk_out_endpoint[i]; |
| 947 | port = serial->port[i]; |
Stefani Seibold | 119eecc | 2009-12-23 09:10:48 +0100 | [diff] [blame] | 948 | if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 949 | goto probe_error; |
Johan Hovold | bbcb2b9 | 2010-03-17 23:00:37 +0100 | [diff] [blame] | 950 | buffer_size = serial->type->bulk_out_size; |
| 951 | if (!buffer_size) |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 952 | buffer_size = usb_endpoint_maxp(endpoint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | port->bulk_out_size = buffer_size; |
| 954 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; |
Johan Hovold | 1ce7b93 | 2011-11-06 19:06:31 +0100 | [diff] [blame] | 955 | |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 956 | for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) { |
| 957 | set_bit(j, &port->write_urbs_free); |
| 958 | port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); |
| 959 | if (!port->write_urbs[j]) { |
| 960 | dev_err(&interface->dev, |
| 961 | "No free urbs available\n"); |
| 962 | goto probe_error; |
| 963 | } |
| 964 | port->bulk_out_buffers[j] = kmalloc(buffer_size, |
| 965 | GFP_KERNEL); |
| 966 | if (!port->bulk_out_buffers[j]) { |
| 967 | dev_err(&interface->dev, |
| 968 | "Couldn't allocate bulk_out_buffer\n"); |
| 969 | goto probe_error; |
| 970 | } |
| 971 | usb_fill_bulk_urb(port->write_urbs[j], dev, |
| 972 | usb_sndbulkpipe(dev, |
| 973 | endpoint->bEndpointAddress), |
| 974 | port->bulk_out_buffers[j], buffer_size, |
| 975 | serial->type->write_bulk_callback, |
| 976 | port); |
| 977 | } |
Johan Hovold | 1ce7b93 | 2011-11-06 19:06:31 +0100 | [diff] [blame] | 978 | |
| 979 | port->write_urb = port->write_urbs[0]; |
| 980 | port->bulk_out_buffer = port->bulk_out_buffers[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | } |
| 982 | |
| 983 | if (serial->type->read_int_callback) { |
| 984 | for (i = 0; i < num_interrupt_in; ++i) { |
| 985 | endpoint = interrupt_in_endpoint[i]; |
| 986 | port = serial->port[i]; |
| 987 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 988 | if (!port->interrupt_in_urb) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 989 | dev_err(&interface->dev, |
| 990 | "No free urbs available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | goto probe_error; |
| 992 | } |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 993 | buffer_size = usb_endpoint_maxp(endpoint); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 994 | port->interrupt_in_endpointAddress = |
| 995 | endpoint->bEndpointAddress; |
| 996 | port->interrupt_in_buffer = kmalloc(buffer_size, |
| 997 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | if (!port->interrupt_in_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 999 | dev_err(&interface->dev, |
| 1000 | "Couldn't allocate interrupt_in_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | goto probe_error; |
| 1002 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1003 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
| 1004 | usb_rcvintpipe(dev, |
| 1005 | endpoint->bEndpointAddress), |
| 1006 | port->interrupt_in_buffer, buffer_size, |
| 1007 | serial->type->read_int_callback, port, |
| 1008 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | } else if (num_interrupt_in) { |
| 1011 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); |
| 1012 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1013 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | if (serial->type->write_int_callback) { |
| 1015 | for (i = 0; i < num_interrupt_out; ++i) { |
| 1016 | endpoint = interrupt_out_endpoint[i]; |
| 1017 | port = serial->port[i]; |
| 1018 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1019 | if (!port->interrupt_out_urb) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1020 | dev_err(&interface->dev, |
| 1021 | "No free urbs available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | goto probe_error; |
| 1023 | } |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 1024 | buffer_size = usb_endpoint_maxp(endpoint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | port->interrupt_out_size = buffer_size; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1026 | port->interrupt_out_endpointAddress = |
| 1027 | endpoint->bEndpointAddress; |
| 1028 | port->interrupt_out_buffer = kmalloc(buffer_size, |
| 1029 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | if (!port->interrupt_out_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1031 | dev_err(&interface->dev, |
| 1032 | "Couldn't allocate interrupt_out_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | goto probe_error; |
| 1034 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1035 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
| 1036 | usb_sndintpipe(dev, |
| 1037 | endpoint->bEndpointAddress), |
| 1038 | port->interrupt_out_buffer, buffer_size, |
| 1039 | serial->type->write_int_callback, port, |
| 1040 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
| 1042 | } else if (num_interrupt_out) { |
| 1043 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); |
| 1044 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | /* if this device type has an attach function, call it */ |
| 1047 | if (type->attach) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1048 | retval = type->attach(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | if (retval < 0) |
| 1050 | goto probe_error; |
Alan Stern | a4720c6 | 2009-10-09 12:43:12 -0400 | [diff] [blame] | 1051 | serial->attached = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | if (retval > 0) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1053 | /* quietly accept this device, but don't bind to a |
| 1054 | serial port as it's about to disappear */ |
Alan Stern | 0a3c854 | 2009-05-27 11:25:52 -0400 | [diff] [blame] | 1055 | serial->num_ports = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | goto exit; |
| 1057 | } |
Alan Stern | a4720c6 | 2009-10-09 12:43:12 -0400 | [diff] [blame] | 1058 | } else { |
| 1059 | serial->attached = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | } |
| 1061 | |
Johan Hovold | a65a6f1 | 2012-03-20 16:59:33 +0100 | [diff] [blame] | 1062 | /* Avoid race with tty_open and serial_install by setting the |
| 1063 | * disconnected flag and not clearing it until all ports have been |
| 1064 | * registered. |
| 1065 | */ |
| 1066 | serial->disconnected = 1; |
| 1067 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1068 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1069 | dev_err(&interface->dev, "No more free serial devices\n"); |
| 1070 | goto probe_error; |
| 1071 | } |
Oliver Neukum | c744f99 | 2007-02-26 15:43:00 +0100 | [diff] [blame] | 1072 | serial->minor = minor; |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1073 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | /* register all of the individual ports with the driver core */ |
| 1075 | for (i = 0; i < num_ports; ++i) { |
| 1076 | port = serial->port[i]; |
Kay Sievers | 0031a06 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1077 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1078 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
Ming Lei | a7a6b79 | 2010-07-13 23:56:24 +0800 | [diff] [blame] | 1079 | device_enable_async_suspend(&port->dev); |
| 1080 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1081 | retval = device_add(&port->dev); |
Alan Stern | 891a3b1 | 2012-03-28 16:10:49 -0400 | [diff] [blame] | 1082 | if (retval) |
Greg Kroah-Hartman | 13f4db9 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 1083 | dev_err(&port->dev, "Error registering port device, " |
| 1084 | "continuing\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | } |
| 1086 | |
Johan Hovold | a65a6f1 | 2012-03-20 16:59:33 +0100 | [diff] [blame] | 1087 | serial->disconnected = 0; |
| 1088 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1089 | usb_serial_console_init(debug, minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | |
| 1091 | exit: |
| 1092 | /* success */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1093 | usb_set_intfdata(interface, serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 1094 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | return 0; |
| 1096 | |
| 1097 | probe_error: |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1098 | usb_serial_put(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 1099 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | return -EIO; |
| 1101 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1102 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
| 1104 | void usb_serial_disconnect(struct usb_interface *interface) |
| 1105 | { |
| 1106 | int i; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1107 | struct usb_serial *serial = usb_get_intfdata(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | struct device *dev = &interface->dev; |
| 1109 | struct usb_serial_port *port; |
| 1110 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 1111 | usb_serial_console_disconnect(serial); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1112 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1114 | mutex_lock(&serial->disc_mutex); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1115 | usb_set_intfdata(interface, NULL); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1116 | /* must set a flag, to signal subdrivers */ |
| 1117 | serial->disconnected = 1; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1118 | mutex_unlock(&serial->disc_mutex); |
| 1119 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1120 | for (i = 0; i < serial->num_ports; ++i) { |
| 1121 | port = serial->port[i]; |
| 1122 | if (port) { |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1123 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
| 1124 | if (tty) { |
Alan Cox | d2b3918 | 2009-09-19 13:13:23 -0700 | [diff] [blame] | 1125 | tty_vhangup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1126 | tty_kref_put(tty); |
| 1127 | } |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1128 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1129 | cancel_work_sync(&port->work); |
Alan Stern | 891a3b1 | 2012-03-28 16:10:49 -0400 | [diff] [blame] | 1130 | if (device_is_registered(&port->dev)) |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1131 | device_del(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | } |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1134 | serial->type->disconnect(serial); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1135 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1136 | /* let the last holder of this object cause it to be cleaned up */ |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1137 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | dev_info(dev, "device disconnected\n"); |
| 1139 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1140 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1142 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
| 1143 | { |
| 1144 | struct usb_serial *serial = usb_get_intfdata(intf); |
| 1145 | struct usb_serial_port *port; |
| 1146 | int i, r = 0; |
| 1147 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1148 | serial->suspending = 1; |
| 1149 | |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1150 | if (serial->type->suspend) { |
| 1151 | r = serial->type->suspend(serial, message); |
Oliver Neukum | a5f6005 | 2009-10-01 15:01:17 +0200 | [diff] [blame] | 1152 | if (r < 0) { |
| 1153 | serial->suspending = 0; |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1154 | goto err_out; |
Oliver Neukum | a5f6005 | 2009-10-01 15:01:17 +0200 | [diff] [blame] | 1155 | } |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1156 | } |
| 1157 | |
Oliver Neukum | e31c188 | 2007-07-23 08:58:39 +0200 | [diff] [blame] | 1158 | for (i = 0; i < serial->num_ports; ++i) { |
| 1159 | port = serial->port[i]; |
| 1160 | if (port) |
| 1161 | kill_traffic(port); |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1162 | } |
| 1163 | |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1164 | err_out: |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1165 | return r; |
| 1166 | } |
| 1167 | EXPORT_SYMBOL(usb_serial_suspend); |
| 1168 | |
| 1169 | int usb_serial_resume(struct usb_interface *intf) |
| 1170 | { |
| 1171 | struct usb_serial *serial = usb_get_intfdata(intf); |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1172 | int rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1173 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1174 | serial->suspending = 0; |
Sarah Sharp | 8abaee2 | 2007-10-25 10:58:43 -0700 | [diff] [blame] | 1175 | if (serial->type->resume) |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1176 | rv = serial->type->resume(serial); |
| 1177 | else |
| 1178 | rv = usb_serial_generic_resume(serial); |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1179 | |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1180 | return rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1181 | } |
| 1182 | EXPORT_SYMBOL(usb_serial_resume); |
| 1183 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1184 | static const struct tty_operations serial_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | .open = serial_open, |
| 1186 | .close = serial_close, |
| 1187 | .write = serial_write, |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 1188 | .hangup = serial_hangup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | .write_room = serial_write_room, |
| 1190 | .ioctl = serial_ioctl, |
| 1191 | .set_termios = serial_set_termios, |
| 1192 | .throttle = serial_throttle, |
| 1193 | .unthrottle = serial_unthrottle, |
| 1194 | .break_ctl = serial_break, |
| 1195 | .chars_in_buffer = serial_chars_in_buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | .tiocmget = serial_tiocmget, |
| 1197 | .tiocmset = serial_tiocmset, |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 1198 | .get_icount = serial_get_icount, |
| 1199 | .cleanup = serial_cleanup, |
| 1200 | .install = serial_install, |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 1201 | .proc_fops = &serial_proc_fops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | }; |
| 1203 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | struct tty_driver *usb_serial_tty_driver; |
| 1206 | |
| 1207 | static int __init usb_serial_init(void) |
| 1208 | { |
| 1209 | int i; |
| 1210 | int result; |
| 1211 | |
| 1212 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); |
| 1213 | if (!usb_serial_tty_driver) |
| 1214 | return -ENOMEM; |
| 1215 | |
| 1216 | /* Initialize our global data */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1217 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | serial_table[i] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
| 1220 | result = bus_register(&usb_serial_bus_type); |
| 1221 | if (result) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1222 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
| 1223 | "failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | goto exit_bus; |
| 1225 | } |
| 1226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | usb_serial_tty_driver->driver_name = "usbserial"; |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 1228 | usb_serial_tty_driver->name = "ttyUSB"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; |
| 1230 | usb_serial_tty_driver->minor_start = 0; |
| 1231 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 1232 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1233 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
| 1234 | TTY_DRIVER_DYNAMIC_DEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | usb_serial_tty_driver->init_termios = tty_std_termios; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1236 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
| 1237 | | HUPCL | CLOCAL; |
Alan Cox | a5b6f60 | 2008-04-08 17:16:06 +0100 | [diff] [blame] | 1238 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
| 1239 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
| 1241 | result = tty_register_driver(usb_serial_tty_driver); |
| 1242 | if (result) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1243 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
| 1244 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | goto exit_reg_driver; |
| 1246 | } |
| 1247 | |
| 1248 | /* register the USB driver */ |
| 1249 | result = usb_register(&usb_serial_driver); |
| 1250 | if (result < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1251 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
| 1252 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | goto exit_tty; |
| 1254 | } |
| 1255 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1256 | /* register the generic driver, if we should */ |
| 1257 | result = usb_serial_generic_register(debug); |
| 1258 | if (result < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1259 | printk(KERN_ERR "usb-serial: %s - registering generic " |
| 1260 | "driver failed\n", __func__); |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1261 | goto exit_generic; |
| 1262 | } |
| 1263 | |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1264 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
| 1266 | return result; |
| 1267 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1268 | exit_generic: |
| 1269 | usb_deregister(&usb_serial_driver); |
| 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | exit_tty: |
| 1272 | tty_unregister_driver(usb_serial_tty_driver); |
| 1273 | |
| 1274 | exit_reg_driver: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | bus_unregister(&usb_serial_bus_type); |
| 1276 | |
| 1277 | exit_bus: |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1278 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
| 1279 | __func__, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | put_tty_driver(usb_serial_tty_driver); |
| 1281 | return result; |
| 1282 | } |
| 1283 | |
| 1284 | |
| 1285 | static void __exit usb_serial_exit(void) |
| 1286 | { |
| 1287 | usb_serial_console_exit(); |
| 1288 | |
| 1289 | usb_serial_generic_deregister(); |
| 1290 | |
| 1291 | usb_deregister(&usb_serial_driver); |
| 1292 | tty_unregister_driver(usb_serial_tty_driver); |
| 1293 | put_tty_driver(usb_serial_tty_driver); |
| 1294 | bus_unregister(&usb_serial_bus_type); |
| 1295 | } |
| 1296 | |
| 1297 | |
| 1298 | module_init(usb_serial_init); |
| 1299 | module_exit(usb_serial_exit); |
| 1300 | |
| 1301 | #define set_to_generic_if_null(type, function) \ |
| 1302 | do { \ |
| 1303 | if (!type->function) { \ |
| 1304 | type->function = usb_serial_generic_##function; \ |
| 1305 | dbg("Had to override the " #function \ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1306 | " usb serial operation with the generic one.");\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | } \ |
| 1308 | } while (0) |
| 1309 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1310 | static void fixup_generic(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | { |
| 1312 | set_to_generic_if_null(device, open); |
| 1313 | set_to_generic_if_null(device, write); |
| 1314 | set_to_generic_if_null(device, close); |
| 1315 | set_to_generic_if_null(device, write_room); |
| 1316 | set_to_generic_if_null(device, chars_in_buffer); |
| 1317 | set_to_generic_if_null(device, read_bulk_callback); |
| 1318 | set_to_generic_if_null(device, write_bulk_callback); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1319 | set_to_generic_if_null(device, disconnect); |
| 1320 | set_to_generic_if_null(device, release); |
Johan Hovold | 2315432 | 2010-03-17 23:05:57 +0100 | [diff] [blame] | 1321 | set_to_generic_if_null(device, process_read_urb); |
Johan Hovold | eaa3bcb | 2010-03-17 23:06:08 +0100 | [diff] [blame] | 1322 | set_to_generic_if_null(device, prepare_write_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | } |
| 1324 | |
Greg Kroah-Hartman | f799e76 | 2012-02-24 12:50:30 -0800 | [diff] [blame] | 1325 | static int usb_serial_register(struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | { |
| 1327 | int retval; |
| 1328 | |
Dave Young | e4abe66 | 2009-02-14 21:21:13 +0800 | [diff] [blame] | 1329 | if (usb_disabled()) |
| 1330 | return -ENODEV; |
| 1331 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1332 | fixup_generic(driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1334 | if (!driver->description) |
| 1335 | driver->description = driver->driver.name; |
Alan Stern | 5620b5f | 2011-01-11 14:16:50 -0500 | [diff] [blame] | 1336 | if (!driver->usb_driver) { |
| 1337 | WARN(1, "Serial driver %s has no usb_driver\n", |
| 1338 | driver->description); |
| 1339 | return -EINVAL; |
| 1340 | } |
| 1341 | driver->usb_driver->supports_autosuspend = 1; |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | /* Add this device to our list of devices */ |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1344 | mutex_lock(&table_lock); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1345 | list_add(&driver->driver_list, &usb_serial_driver_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1347 | retval = usb_serial_bus_register(driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | if (retval) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1349 | printk(KERN_ERR "usb-serial: problem %d when registering " |
| 1350 | "driver %s\n", retval, driver->description); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1351 | list_del(&driver->driver_list); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1352 | } else |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1353 | printk(KERN_INFO "USB Serial support registered for %s\n", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1354 | driver->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1356 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | return retval; |
| 1358 | } |
| 1359 | |
Greg Kroah-Hartman | f799e76 | 2012-02-24 12:50:30 -0800 | [diff] [blame] | 1360 | static void usb_serial_deregister(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | { |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1362 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
| 1363 | device->description); |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1364 | mutex_lock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | list_del(&device->driver_list); |
| 1366 | usb_serial_bus_deregister(device); |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1367 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1370 | /** |
| 1371 | * usb_serial_register_drivers - register drivers for a usb-serial module |
| 1372 | * @udriver: usb_driver used for matching devices/interfaces |
| 1373 | * @serial_drivers: NULL-terminated array of pointers to drivers to be registered |
| 1374 | * |
| 1375 | * Registers @udriver and all the drivers in the @serial_drivers array. |
| 1376 | * Automatically fills in the .no_dynamic_id field in @udriver and |
| 1377 | * the .usb_driver field in each serial driver. |
| 1378 | */ |
| 1379 | int usb_serial_register_drivers(struct usb_driver *udriver, |
| 1380 | struct usb_serial_driver * const serial_drivers[]) |
| 1381 | { |
| 1382 | int rc; |
| 1383 | const struct usb_device_id *saved_id_table; |
| 1384 | struct usb_serial_driver * const *sd; |
| 1385 | |
| 1386 | /* |
| 1387 | * udriver must be registered before any of the serial drivers, |
| 1388 | * because the store_new_id() routine for the serial drivers (in |
| 1389 | * bus.c) probes udriver. |
| 1390 | * |
| 1391 | * Performance hack: We don't want udriver to be probed until |
| 1392 | * the serial drivers are registered, because the probe would |
| 1393 | * simply fail for lack of a matching serial driver. |
| 1394 | * Therefore save off udriver's id_table until we are all set. |
| 1395 | */ |
| 1396 | saved_id_table = udriver->id_table; |
| 1397 | udriver->id_table = NULL; |
| 1398 | |
| 1399 | udriver->no_dynamic_id = 1; |
| 1400 | rc = usb_register(udriver); |
| 1401 | if (rc) |
| 1402 | return rc; |
| 1403 | |
| 1404 | for (sd = serial_drivers; *sd; ++sd) { |
| 1405 | (*sd)->usb_driver = udriver; |
| 1406 | rc = usb_serial_register(*sd); |
| 1407 | if (rc) |
| 1408 | goto failed; |
| 1409 | } |
| 1410 | |
| 1411 | /* Now restore udriver's id_table and look for matches */ |
| 1412 | udriver->id_table = saved_id_table; |
| 1413 | rc = driver_attach(&udriver->drvwrap.driver); |
| 1414 | return 0; |
| 1415 | |
| 1416 | failed: |
| 1417 | while (sd-- > serial_drivers) |
| 1418 | usb_serial_deregister(*sd); |
| 1419 | usb_deregister(udriver); |
| 1420 | return rc; |
| 1421 | } |
| 1422 | EXPORT_SYMBOL_GPL(usb_serial_register_drivers); |
| 1423 | |
| 1424 | /** |
| 1425 | * usb_serial_deregister_drivers - deregister drivers for a usb-serial module |
| 1426 | * @udriver: usb_driver to unregister |
| 1427 | * @serial_drivers: NULL-terminated array of pointers to drivers to be deregistered |
| 1428 | * |
| 1429 | * Deregisters @udriver and all the drivers in the @serial_drivers array. |
| 1430 | */ |
| 1431 | void usb_serial_deregister_drivers(struct usb_driver *udriver, |
| 1432 | struct usb_serial_driver * const serial_drivers[]) |
| 1433 | { |
| 1434 | for (; *serial_drivers; ++serial_drivers) |
| 1435 | usb_serial_deregister(*serial_drivers); |
| 1436 | usb_deregister(udriver); |
| 1437 | } |
| 1438 | EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
| 1440 | /* Module information */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1441 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1442 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | MODULE_LICENSE("GPL"); |
| 1444 | |
| 1445 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 1446 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |