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> |
Alexey Dobriyan | 405f557 | 2009-07-11 22:08:37 +0400 | [diff] [blame] | 24 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/tty.h> |
| 26 | #include <linux/tty_driver.h> |
| 27 | #include <linux/tty_flip.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/moduleparam.h> |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 30 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 32 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/list.h> |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 34 | #include <linux/uaccess.h> |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 35 | #include <linux/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 37 | #include <linux/usb/serial.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, |
Greg Kroah-Hartman | ba9dc65 | 2005-11-16 13:41:28 -0800 | [diff] [blame] | 53 | .no_dynamic_id = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
| 56 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead |
| 57 | the MODULE_DEVICE_TABLE declarations in each serial driver |
| 58 | cause the "hotplug" program to pull in whatever module is necessary |
| 59 | via modprobe, and modprobe will load usbserial because the serial |
| 60 | drivers depend on it. |
| 61 | */ |
| 62 | |
| 63 | static int debug; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 64 | /* initially all NULL */ |
| 65 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 66 | static DEFINE_MUTEX(table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | static LIST_HEAD(usb_serial_driver_list); |
| 68 | |
| 69 | struct usb_serial *usb_serial_get_by_index(unsigned index) |
| 70 | { |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 71 | struct usb_serial *serial; |
| 72 | |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 73 | mutex_lock(&table_lock); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 74 | serial = serial_table[index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | if (serial) |
| 77 | kref_get(&serial->kref); |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 78 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | return serial; |
| 80 | } |
| 81 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 82 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
| 83 | int num_ports, unsigned int *minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
| 85 | unsigned int i, j; |
| 86 | int good_spot; |
| 87 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 88 | dbg("%s %d", __func__, num_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | *minor = 0; |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 91 | mutex_lock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
| 93 | if (serial_table[i]) |
| 94 | continue; |
| 95 | |
| 96 | good_spot = 1; |
| 97 | for (j = 1; j <= num_ports-1; ++j) |
| 98 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { |
| 99 | good_spot = 0; |
| 100 | i += j; |
| 101 | break; |
| 102 | } |
| 103 | if (good_spot == 0) |
| 104 | continue; |
| 105 | |
| 106 | *minor = i; |
Oliver Neukum | a1f721c | 2007-03-05 15:23:51 +0100 | [diff] [blame] | 107 | j = 0; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 108 | dbg("%s - minor base = %d", __func__, *minor); |
Oliver Neukum | a1f721c | 2007-03-05 15:23:51 +0100 | [diff] [blame] | 109 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | serial_table[i] = serial; |
Oliver Neukum | a1f721c | 2007-03-05 15:23:51 +0100 | [diff] [blame] | 111 | serial->port[j++]->number = i; |
| 112 | } |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 113 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return serial; |
| 115 | } |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 116 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | return NULL; |
| 118 | } |
| 119 | |
| 120 | static void return_serial(struct usb_serial *serial) |
| 121 | { |
| 122 | int i; |
| 123 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 124 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 126 | for (i = 0; i < serial->num_ports; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | serial_table[serial->minor + i] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | static void destroy_serial(struct kref *kref) |
| 131 | { |
| 132 | struct usb_serial *serial; |
| 133 | struct usb_serial_port *port; |
| 134 | int i; |
| 135 | |
| 136 | serial = to_usb_serial(kref); |
| 137 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 138 | dbg("%s - %s", __func__, serial->type->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Jim Radford | 521b85a | 2007-03-13 08:30:50 -0700 | [diff] [blame] | 140 | /* return the minor range that this device had */ |
Alan Stern | 0282b7f | 2008-07-29 12:01:04 -0400 | [diff] [blame] | 141 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
| 142 | return_serial(serial); |
Jim Radford | 521b85a | 2007-03-13 08:30:50 -0700 | [diff] [blame] | 143 | |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 144 | serial->type->release(serial); |
| 145 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 146 | /* Now that nothing is using the ports, they can be freed */ |
| 147 | for (i = 0; i < serial->num_port_pointers; ++i) { |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 148 | port = serial->port[i]; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 149 | if (port) { |
| 150 | port->serial = NULL; |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 151 | put_device(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } |
| 153 | } |
| 154 | |
| 155 | usb_put_dev(serial->dev); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 156 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 159 | void usb_serial_put(struct usb_serial *serial) |
| 160 | { |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 161 | mutex_lock(&table_lock); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 162 | kref_put(&serial->kref, destroy_serial); |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 163 | mutex_unlock(&table_lock); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 164 | } |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /***************************************************************************** |
| 167 | * Driver tty interface functions |
| 168 | *****************************************************************************/ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 169 | static int serial_open (struct tty_struct *tty, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
| 171 | struct usb_serial *serial; |
| 172 | struct usb_serial_port *port; |
| 173 | unsigned int portNumber; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 174 | int retval = 0; |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 175 | int first = 0; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 176 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 177 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | /* get the serial object associated with this tty pointer */ |
| 180 | serial = usb_serial_get_by_index(tty->index); |
| 181 | if (!serial) { |
| 182 | tty->driver_data = NULL; |
| 183 | return -ENODEV; |
| 184 | } |
| 185 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 186 | mutex_lock(&serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | portNumber = tty->index - serial->minor; |
| 188 | port = serial->port[portNumber]; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 189 | if (!port || serial->disconnected) |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 190 | retval = -ENODEV; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 191 | /* |
| 192 | * Note: Our locking order requirement does not allow port->mutex |
| 193 | * to be acquired while serial->disc_mutex is held. |
| 194 | */ |
| 195 | mutex_unlock(&serial->disc_mutex); |
| 196 | if (retval) |
| 197 | goto bailout_serial_put; |
James Woodcock | 331879f | 2009-02-11 15:06:53 +0000 | [diff] [blame] | 198 | |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 199 | if (mutex_lock_interruptible(&port->mutex)) { |
| 200 | retval = -ERESTARTSYS; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 201 | goto bailout_serial_put; |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 202 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 203 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 204 | ++port->port.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Paul Fulghum | ca85485 | 2006-04-13 22:28:17 +0200 | [diff] [blame] | 206 | /* set up our port structure making the tty driver |
| 207 | * remember our port object, and us it */ |
| 208 | tty->driver_data = port; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 209 | tty_port_tty_set(&port->port, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
Jason Wessel | 6e40612 | 2009-06-22 11:32:20 -0500 | [diff] [blame] | 211 | /* If the console is attached, the device is already open */ |
| 212 | if (port->port.count == 1 && !port->console) { |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 213 | first = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | /* lock this module before we call it |
| 215 | * this may fail, which means we must bail out, |
| 216 | * safe because we are called with BKL held */ |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 217 | if (!try_module_get(serial->type->driver.owner)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | retval = -ENODEV; |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 219 | goto bailout_mutex_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 222 | mutex_lock(&serial->disc_mutex); |
| 223 | if (serial->disconnected) |
| 224 | retval = -ENODEV; |
| 225 | else |
| 226 | retval = usb_autopm_get_interface(serial->interface); |
Sarah Sharp | f0fbd5b | 2007-11-13 17:10:09 -0800 | [diff] [blame] | 227 | if (retval) |
| 228 | goto bailout_module_put; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 229 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 230 | /* only call the device specific open if this |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | * is the first time the port is opened */ |
Alan Cox | a509a7e | 2009-09-19 13:13:26 -0700 | [diff] [blame] | 232 | retval = serial->type->open(tty, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | if (retval) |
Sarah Sharp | f0fbd5b | 2007-11-13 17:10:09 -0800 | [diff] [blame] | 234 | goto bailout_interface_put; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 235 | mutex_unlock(&serial->disc_mutex); |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 236 | set_bit(ASYNCB_INITIALIZED, &port->port.flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | } |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 238 | mutex_unlock(&port->mutex); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 239 | /* Now do the correct tty layer semantics */ |
| 240 | retval = tty_port_block_til_ready(&port->port, tty, filp); |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 241 | if (retval == 0) { |
| 242 | if (!first) |
| 243 | usb_serial_put(serial); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 244 | return 0; |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 245 | } |
| 246 | mutex_lock(&port->mutex); |
| 247 | if (first == 0) |
| 248 | goto bailout_mutex_unlock; |
| 249 | /* Undo the initial port actions */ |
| 250 | mutex_lock(&serial->disc_mutex); |
Sarah Sharp | f0fbd5b | 2007-11-13 17:10:09 -0800 | [diff] [blame] | 251 | bailout_interface_put: |
| 252 | usb_autopm_put_interface(serial->interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | bailout_module_put: |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 254 | mutex_unlock(&serial->disc_mutex); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 255 | module_put(serial->type->driver.owner); |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 256 | bailout_mutex_unlock: |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 257 | port->port.count = 0; |
Frank Gevaerts | b059c81 | 2006-06-14 15:52:05 +0200 | [diff] [blame] | 258 | tty->driver_data = NULL; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 259 | tty_port_tty_set(&port->port, NULL); |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 260 | mutex_unlock(&port->mutex); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 261 | bailout_serial_put: |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 262 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return retval; |
| 264 | } |
| 265 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 266 | /** |
| 267 | * serial_do_down - shut down hardware |
| 268 | * @port: port to shut down |
| 269 | * |
| 270 | * Shut down a USB port unless it is the console. We never shut down the |
| 271 | * console hardware as it will always be in use. |
| 272 | * |
| 273 | * Don't free any resources at this point |
| 274 | */ |
| 275 | static void serial_do_down(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 277 | struct usb_serial_driver *drv = port->serial->type; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 278 | struct usb_serial *serial; |
| 279 | struct module *owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 281 | /* The console is magical, do not hang up the console hardware |
| 282 | or there will be tears */ |
| 283 | if (port->console) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | return; |
| 285 | |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 286 | mutex_lock(&port->mutex); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 287 | serial = port->serial; |
| 288 | owner = serial->type->driver.owner; |
Luiz Fernando Capitulino | 8a4613f | 2005-11-28 19:16:07 -0200 | [diff] [blame] | 289 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 290 | if (drv->close) |
| 291 | drv->close(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 293 | mutex_unlock(&port->mutex); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | /** |
| 297 | * serial_do_free - free resources post close/hangup |
| 298 | * @port: port to free up |
| 299 | * |
| 300 | * Do the resource freeing and refcount dropping for the port. We must |
| 301 | * be careful about ordering and we must avoid freeing up the console. |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 302 | * |
| 303 | * Called when the last tty kref is dropped. |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 304 | */ |
| 305 | |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 306 | static void serial_do_free(struct tty_struct *tty) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 307 | { |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 308 | struct usb_serial_port *port = tty->driver_data; |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 309 | struct usb_serial *serial; |
| 310 | struct module *owner; |
| 311 | |
| 312 | /* The console is magical, do not hang up the console hardware |
| 313 | or there will be tears */ |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 314 | if (port == NULL || port->console) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 315 | return; |
| 316 | |
| 317 | serial = port->serial; |
| 318 | owner = serial->type->driver.owner; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 319 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 320 | mutex_lock(&serial->disc_mutex); |
| 321 | if (!serial->disconnected) |
| 322 | usb_autopm_put_interface(serial->interface); |
| 323 | mutex_unlock(&serial->disc_mutex); |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 324 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 325 | usb_serial_put(serial); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 326 | module_put(owner); |
| 327 | } |
| 328 | |
| 329 | static void serial_close(struct tty_struct *tty, struct file *filp) |
| 330 | { |
| 331 | struct usb_serial_port *port = tty->driver_data; |
| 332 | |
Thadeu Lima de Souza Cascardo | f4fa446 | 2009-06-25 14:41:37 +0100 | [diff] [blame] | 333 | if (!port) |
| 334 | return; |
| 335 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 336 | dbg("%s - port %d", __func__, port->number); |
| 337 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 338 | if (tty_port_close_start(&port->port, tty, filp) == 0) |
| 339 | return; |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 340 | serial_do_down(port); |
| 341 | tty_port_close_end(&port->port, tty); |
| 342 | tty_port_tty_set(&port->port, NULL); |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 343 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | static void serial_hangup(struct tty_struct *tty) |
| 347 | { |
| 348 | struct usb_serial_port *port = tty->driver_data; |
| 349 | serial_do_down(port); |
| 350 | tty_port_hangup(&port->port); |
Alan Cox | b68f2fb | 2009-07-27 10:58:08 +0100 | [diff] [blame] | 351 | /* We must not free port yet - the USB serial layer depends on it's |
| 352 | continued existence */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
| 354 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 355 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
| 356 | int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 358 | struct usb_serial_port *port = tty->driver_data; |
Oliver Neukum | 3ff4fd9 | 2007-01-13 07:32:27 +0100 | [diff] [blame] | 359 | int retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 361 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
Luiz Fernando Capitulino | 487f9c6 | 2005-11-28 19:16:05 -0200 | [diff] [blame] | 362 | goto exit; |
| 363 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 364 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 366 | /* count is managed under the mutex lock for the tty so cannot |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 367 | drop to zero until after the last close completes */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 368 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 371 | retval = port->serial->type->write(tty, port, buf, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | exit: |
| 374 | return retval; |
| 375 | } |
| 376 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 377 | static int serial_write_room(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; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 380 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 381 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 383 | return port->serial->type->write_room(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
| 385 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 386 | static int serial_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 388 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 389 | dbg("%s = port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Alan Cox | eff6937 | 2009-01-02 13:47:06 +0000 | [diff] [blame] | 391 | /* if the device was unplugged then any remaining characters |
| 392 | fell out of the connector ;) */ |
| 393 | if (port->serial->disconnected) |
| 394 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 396 | return port->serial->type->chars_in_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 399 | static void serial_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 401 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 402 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 404 | WARN_ON(!port->port.count); |
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->throttle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 407 | port->serial->type->throttle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 410 | static void serial_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 412 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 413 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 415 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | /* pass on to the driver specific version of this function */ |
| 417 | if (port->serial->type->unthrottle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 418 | port->serial->type->unthrottle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | } |
| 420 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 421 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
| 422 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 424 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | int retval = -ENODEV; |
| 426 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 427 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 429 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 431 | /* pass on to the driver specific version of this function |
| 432 | if it is available */ |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 433 | if (port->serial->type->ioctl) { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 434 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 435 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | retval = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | return retval; |
| 438 | } |
| 439 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 440 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
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; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 443 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 445 | WARN_ON(!port->port.count); |
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 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | if (port->serial->type->set_termios) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 449 | port->serial->type->set_termios(tty, port, old); |
Alan Cox | 3378509 | 2007-10-18 01:24:22 -0700 | [diff] [blame] | 450 | else |
| 451 | tty_termios_copy_hw(tty->termios, old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
| 453 | |
Alan Cox | 9e98966c | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 454 | static int serial_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 456 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 458 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 460 | WARN_ON(!port->port.count); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 461 | /* pass on to the driver specific version of this function |
| 462 | if it is available */ |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 463 | if (port->serial->type->break_ctl) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 464 | port->serial->type->break_ctl(tty, break_state); |
Alan Cox | 9e98966c | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 465 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | } |
| 467 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 468 | static int serial_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | { |
| 470 | struct usb_serial *serial; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | char tmp[40]; |
| 473 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 474 | dbg("%s", __func__); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 475 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
| 476 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | serial = usb_serial_get_by_index(i); |
| 478 | if (serial == NULL) |
| 479 | continue; |
| 480 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 481 | seq_printf(m, "%d:", i); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 482 | if (serial->type->driver.owner) |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 483 | seq_printf(m, " module:%s", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 484 | module_name(serial->type->driver.owner)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 485 | seq_printf(m, " name:\"%s\"", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 486 | serial->type->description); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 487 | seq_printf(m, " vendor:%04x product:%04x", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 488 | le16_to_cpu(serial->dev->descriptor.idVendor), |
| 489 | le16_to_cpu(serial->dev->descriptor.idProduct)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 490 | seq_printf(m, " num_ports:%d", serial->num_ports); |
| 491 | seq_printf(m, " port:%d", i - serial->minor + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 493 | seq_printf(m, " path:%s", tmp); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 494 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 495 | seq_putc(m, '\n'); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 496 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 498 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 501 | static int serial_proc_open(struct inode *inode, struct file *file) |
| 502 | { |
| 503 | return single_open(file, serial_proc_show, NULL); |
| 504 | } |
| 505 | |
| 506 | static const struct file_operations serial_proc_fops = { |
| 507 | .owner = THIS_MODULE, |
| 508 | .open = serial_proc_open, |
| 509 | .read = seq_read, |
| 510 | .llseek = seq_lseek, |
| 511 | .release = single_release, |
| 512 | }; |
| 513 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 514 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 516 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 518 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 520 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | if (port->serial->type->tiocmget) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 522 | return port->serial->type->tiocmget(tty, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | return -EINVAL; |
| 524 | } |
| 525 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 526 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | unsigned int set, unsigned int clear) |
| 528 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 529 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 531 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 533 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | if (port->serial->type->tiocmset) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 535 | return port->serial->type->tiocmset(tty, file, set, clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return -EINVAL; |
| 537 | } |
| 538 | |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 539 | /* |
| 540 | * We would be calling tty_wakeup here, but unfortunately some line |
| 541 | * disciplines have an annoying habit of calling tty->write from |
| 542 | * the write wakeup callback (e.g. n_hdlc.c). |
| 543 | */ |
| 544 | void usb_serial_port_softint(struct usb_serial_port *port) |
| 545 | { |
| 546 | schedule_work(&port->work); |
| 547 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 548 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 549 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 550 | static void usb_serial_port_work(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 552 | struct usb_serial_port *port = |
| 553 | container_of(work, struct usb_serial_port, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | struct tty_struct *tty; |
| 555 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 556 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 557 | |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 558 | tty = tty_port_tty_get(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | if (!tty) |
| 560 | return; |
| 561 | |
| 562 | tty_wakeup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 563 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
| 565 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 566 | static void kill_traffic(struct usb_serial_port *port) |
Pete Zaitcev | 34f8e76 | 2006-06-21 15:00:45 -0700 | [diff] [blame] | 567 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | usb_kill_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | usb_kill_urb(port->write_urb); |
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); |
| 588 | |
| 589 | dbg ("%s - %s", __func__, dev_name(dev)); |
| 590 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 591 | /* |
| 592 | * Stop all the traffic before cancelling the work, so that |
| 593 | * nobody will restart it by calling usb_serial_port_softint. |
| 594 | */ |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 595 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 596 | cancel_work_sync(&port->work); |
| 597 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 598 | usb_free_urb(port->read_urb); |
| 599 | usb_free_urb(port->write_urb); |
| 600 | usb_free_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | usb_free_urb(port->interrupt_out_urb); |
| 602 | kfree(port->bulk_in_buffer); |
| 603 | kfree(port->bulk_out_buffer); |
| 604 | kfree(port->interrupt_in_buffer); |
| 605 | kfree(port->interrupt_out_buffer); |
| 606 | kfree(port); |
| 607 | } |
| 608 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 609 | static struct usb_serial *create_serial(struct usb_device *dev, |
| 610 | struct usb_interface *interface, |
| 611 | struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | { |
| 613 | struct usb_serial *serial; |
| 614 | |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 615 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | if (!serial) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 617 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | return NULL; |
| 619 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | serial->dev = usb_get_dev(dev); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 621 | serial->type = driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | serial->interface = interface; |
| 623 | kref_init(&serial->kref); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 624 | mutex_init(&serial->disc_mutex); |
Alan Stern | 0282b7f | 2008-07-29 12:01:04 -0400 | [diff] [blame] | 625 | serial->minor = SERIAL_TTY_NO_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | return serial; |
| 628 | } |
| 629 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 630 | 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] | 631 | struct usb_serial_driver *drv) |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 632 | { |
| 633 | struct usb_dynid *dynid; |
| 634 | |
| 635 | spin_lock(&drv->dynids.lock); |
| 636 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 637 | if (usb_match_one_id(intf, &dynid->id)) { |
| 638 | spin_unlock(&drv->dynids.lock); |
| 639 | return &dynid->id; |
| 640 | } |
| 641 | } |
| 642 | spin_unlock(&drv->dynids.lock); |
| 643 | return NULL; |
| 644 | } |
| 645 | |
| 646 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, |
| 647 | struct usb_interface *intf) |
| 648 | { |
| 649 | const struct usb_device_id *id; |
| 650 | |
| 651 | id = usb_match_id(intf, drv->id_table); |
| 652 | if (id) { |
| 653 | dbg("static descriptor matches"); |
| 654 | goto exit; |
| 655 | } |
| 656 | id = match_dynamic_id(intf, drv); |
| 657 | if (id) |
| 658 | dbg("dynamic descriptor matches"); |
| 659 | exit: |
| 660 | return id; |
| 661 | } |
| 662 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 663 | static struct usb_serial_driver *search_serial_device( |
| 664 | struct usb_interface *iface) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | const struct usb_device_id *id; |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 667 | struct usb_serial_driver *drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Adrian Bunk | 93b1fae | 2006-01-10 00:13:33 +0100 | [diff] [blame] | 669 | /* Check if the usb id matches a known device */ |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 670 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
| 671 | id = get_iface_id(drv, iface); |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 672 | if (id) |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 673 | return drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | return NULL; |
| 677 | } |
| 678 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 679 | static int serial_carrier_raised(struct tty_port *port) |
| 680 | { |
| 681 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 682 | struct usb_serial_driver *drv = p->serial->type; |
| 683 | if (drv->carrier_raised) |
| 684 | return drv->carrier_raised(p); |
| 685 | /* No carrier control - don't block */ |
| 686 | return 1; |
| 687 | } |
| 688 | |
| 689 | static void serial_dtr_rts(struct tty_port *port, int on) |
| 690 | { |
| 691 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 692 | struct usb_serial_driver *drv = p->serial->type; |
| 693 | if (drv->dtr_rts) |
| 694 | drv->dtr_rts(p, on); |
| 695 | } |
| 696 | |
| 697 | static const struct tty_port_operations serial_port_ops = { |
| 698 | .carrier_raised = serial_carrier_raised, |
| 699 | .dtr_rts = serial_dtr_rts, |
| 700 | }; |
| 701 | |
Alan Cox | fe1ae7f | 2009-09-19 13:13:33 -0700 | [diff] [blame] | 702 | /** |
| 703 | * serial_install - install tty |
| 704 | * @driver: the driver (USB in our case) |
| 705 | * @tty: the tty being created |
| 706 | * |
| 707 | * Create the termios objects for this tty. We use the default USB |
| 708 | * serial ones but permit them to be overriddenby serial->type->termios. |
| 709 | * This lets us remove all the ugly hackery |
| 710 | */ |
| 711 | |
| 712 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) |
| 713 | { |
| 714 | int idx = tty->index; |
| 715 | struct usb_serial *serial; |
| 716 | int retval; |
| 717 | |
| 718 | /* If the termios setup has yet to be done */ |
| 719 | if (tty->driver->termios[idx] == NULL) { |
| 720 | /* perform the standard setup */ |
| 721 | retval = tty_init_termios(tty); |
| 722 | if (retval) |
| 723 | return retval; |
| 724 | /* allow the driver to update it */ |
| 725 | serial = usb_serial_get_by_index(tty->index); |
| 726 | if (serial->type->init_termios) |
| 727 | serial->type->init_termios(tty); |
| 728 | usb_serial_put(serial); |
| 729 | } |
| 730 | /* Final install (we use the default method) */ |
| 731 | tty_driver_kref_get(driver); |
| 732 | tty->count++; |
| 733 | driver->ttys[idx] = tty; |
| 734 | return 0; |
| 735 | } |
| 736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | int usb_serial_probe(struct usb_interface *interface, |
| 738 | const struct usb_device_id *id) |
| 739 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 740 | struct usb_device *dev = interface_to_usbdev(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | struct usb_serial *serial = NULL; |
| 742 | struct usb_serial_port *port; |
| 743 | struct usb_host_interface *iface_desc; |
| 744 | struct usb_endpoint_descriptor *endpoint; |
| 745 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; |
| 746 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; |
| 747 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; |
| 748 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 749 | struct usb_serial_driver *type = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | int retval; |
Andre Haupt | dd9ca5d | 2008-06-18 15:56:00 +0200 | [diff] [blame] | 751 | unsigned int minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | int buffer_size; |
| 753 | int i; |
| 754 | int num_interrupt_in = 0; |
| 755 | int num_interrupt_out = 0; |
| 756 | int num_bulk_in = 0; |
| 757 | int num_bulk_out = 0; |
| 758 | int num_ports = 0; |
| 759 | int max_endpoints; |
| 760 | |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 761 | lock_kernel(); /* guard against unloading a serial driver module */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | type = search_serial_device(interface); |
| 763 | if (!type) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 764 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | dbg("none matched"); |
| 766 | return -ENODEV; |
| 767 | } |
| 768 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 769 | serial = create_serial(dev, interface, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (!serial) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 771 | unlock_kernel(); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 772 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | return -ENOMEM; |
| 774 | } |
| 775 | |
| 776 | /* if this device type has a probe function, call it */ |
| 777 | if (type->probe) { |
| 778 | const struct usb_device_id *id; |
| 779 | |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 780 | if (!try_module_get(type->driver.owner)) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 781 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 782 | dev_err(&interface->dev, |
| 783 | "module get failed, exiting\n"); |
| 784 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | return -EIO; |
| 786 | } |
| 787 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 788 | id = get_iface_id(type, interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | retval = type->probe(serial, id); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 790 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
| 792 | if (retval) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 793 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 794 | dbg("sub driver rejected device"); |
| 795 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | return retval; |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | /* descriptor matches, let's find the endpoints needed */ |
| 801 | /* check out the endpoints */ |
| 802 | iface_desc = interface->cur_altsetting; |
| 803 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 804 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 805 | |
| 806 | if (usb_endpoint_is_bulk_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | /* we found a bulk in endpoint */ |
| 808 | dbg("found bulk in on endpoint %d", i); |
| 809 | bulk_in_endpoint[num_bulk_in] = endpoint; |
| 810 | ++num_bulk_in; |
| 811 | } |
| 812 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 813 | if (usb_endpoint_is_bulk_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | /* we found a bulk out endpoint */ |
| 815 | dbg("found bulk out on endpoint %d", i); |
| 816 | bulk_out_endpoint[num_bulk_out] = endpoint; |
| 817 | ++num_bulk_out; |
| 818 | } |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 819 | |
| 820 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | /* we found a interrupt in endpoint */ |
| 822 | dbg("found interrupt in on endpoint %d", i); |
| 823 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 824 | ++num_interrupt_in; |
| 825 | } |
| 826 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 827 | if (usb_endpoint_is_int_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | /* we found an interrupt out endpoint */ |
| 829 | dbg("found interrupt out on endpoint %d", i); |
| 830 | interrupt_out_endpoint[num_interrupt_out] = endpoint; |
| 831 | ++num_interrupt_out; |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 836 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | /* this is needed due to the looney way its endpoints are set up */ |
| 838 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && |
| 839 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || |
| 840 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && |
Johannes Steingraeber | 8fd8013 | 2006-09-16 16:17:34 +0200 | [diff] [blame] | 841 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
| 842 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && |
Andreas Bombe | ce816cf | 2008-09-14 01:58:55 +0200 | [diff] [blame] | 843 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
| 844 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && |
| 845 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | if (interface != dev->actconfig->interface[0]) { |
| 847 | /* check out the endpoints of the other interface*/ |
| 848 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; |
| 849 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 850 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 851 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | /* we found a interrupt in endpoint */ |
| 853 | dbg("found interrupt in for Prolific device on separate interface"); |
| 854 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 855 | ++num_interrupt_in; |
| 856 | } |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | /* Now make sure the PL-2303 is configured correctly. |
| 861 | * If not, give up now and hope this hack will work |
| 862 | * properly during a later invocation of usb_serial_probe |
| 863 | */ |
| 864 | if (num_bulk_in == 0 || num_bulk_out == 0) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 865 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | 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] | 867 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | return -ENODEV; |
| 869 | } |
| 870 | } |
| 871 | /* END HORRIBLE HACK FOR PL2303 */ |
| 872 | #endif |
| 873 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | #ifdef CONFIG_USB_SERIAL_GENERIC |
| 875 | if (type == &usb_serial_generic_device) { |
| 876 | num_ports = num_bulk_out; |
| 877 | if (num_ports == 0) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 878 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 879 | dev_err(&interface->dev, |
| 880 | "Generic device with no bulk out, not allowed.\n"); |
| 881 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | return -EIO; |
| 883 | } |
| 884 | } |
| 885 | #endif |
| 886 | if (!num_ports) { |
| 887 | /* if this device type has a calc_num_ports function, call it */ |
| 888 | if (type->calc_num_ports) { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 889 | if (!try_module_get(type->driver.owner)) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 890 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 891 | dev_err(&interface->dev, |
| 892 | "module get failed, exiting\n"); |
| 893 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | return -EIO; |
| 895 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 896 | num_ports = type->calc_num_ports(serial); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 897 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | } |
| 899 | if (!num_ports) |
| 900 | num_ports = type->num_ports; |
| 901 | } |
| 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | serial->num_ports = num_ports; |
| 904 | serial->num_bulk_in = num_bulk_in; |
| 905 | serial->num_bulk_out = num_bulk_out; |
| 906 | serial->num_interrupt_in = num_interrupt_in; |
| 907 | serial->num_interrupt_out = num_interrupt_out; |
| 908 | |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 909 | /* found all that we need */ |
| 910 | dev_info(&interface->dev, "%s converter detected\n", |
| 911 | type->description); |
| 912 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | /* create our ports, we need as many as the max endpoints */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 914 | /* we don't use num_ports here because some devices have more |
| 915 | endpoint pairs than ports */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | max_endpoints = max(num_bulk_in, num_bulk_out); |
| 917 | max_endpoints = max(max_endpoints, num_interrupt_in); |
| 918 | max_endpoints = max(max_endpoints, num_interrupt_out); |
| 919 | max_endpoints = max(max_endpoints, (int)serial->num_ports); |
| 920 | serial->num_port_pointers = max_endpoints; |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 921 | unlock_kernel(); |
| 922 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 923 | dbg("%s - setting up %d port structures for this device", |
| 924 | __func__, max_endpoints); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | for (i = 0; i < max_endpoints; ++i) { |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 926 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | if (!port) |
| 928 | goto probe_error; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 929 | tty_port_init(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 930 | port->port.ops = &serial_port_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | port->serial = serial; |
Greg Kroah-Hartman | 507ca9b | 2005-04-23 12:49:16 -0700 | [diff] [blame] | 932 | spin_lock_init(&port->lock); |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 933 | mutex_init(&port->mutex); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 934 | INIT_WORK(&port->work, usb_serial_port_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | serial->port[i] = port; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 936 | port->dev.parent = &interface->dev; |
| 937 | port->dev.driver = NULL; |
| 938 | port->dev.bus = &usb_serial_bus_type; |
| 939 | port->dev.release = &port_release; |
| 940 | device_initialize(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | /* set up the endpoint information */ |
| 944 | for (i = 0; i < num_bulk_in; ++i) { |
| 945 | endpoint = bulk_in_endpoint[i]; |
| 946 | port = serial->port[i]; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 947 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | if (!port->read_urb) { |
| 949 | dev_err(&interface->dev, "No free urbs available\n"); |
| 950 | goto probe_error; |
| 951 | } |
| 952 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 953 | port->bulk_in_size = buffer_size; |
| 954 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 955 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | if (!port->bulk_in_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 957 | dev_err(&interface->dev, |
| 958 | "Couldn't allocate bulk_in_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | goto probe_error; |
| 960 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 961 | usb_fill_bulk_urb(port->read_urb, dev, |
| 962 | usb_rcvbulkpipe(dev, |
| 963 | endpoint->bEndpointAddress), |
| 964 | port->bulk_in_buffer, buffer_size, |
| 965 | serial->type->read_bulk_callback, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | for (i = 0; i < num_bulk_out; ++i) { |
| 969 | endpoint = bulk_out_endpoint[i]; |
| 970 | port = serial->port[i]; |
| 971 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 972 | if (!port->write_urb) { |
| 973 | dev_err(&interface->dev, "No free urbs available\n"); |
| 974 | goto probe_error; |
| 975 | } |
| 976 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 977 | port->bulk_out_size = buffer_size; |
| 978 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 979 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | if (!port->bulk_out_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 981 | dev_err(&interface->dev, |
| 982 | "Couldn't allocate bulk_out_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | goto probe_error; |
| 984 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 985 | usb_fill_bulk_urb(port->write_urb, dev, |
| 986 | usb_sndbulkpipe(dev, |
| 987 | endpoint->bEndpointAddress), |
| 988 | port->bulk_out_buffer, buffer_size, |
| 989 | serial->type->write_bulk_callback, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | } |
| 991 | |
| 992 | if (serial->type->read_int_callback) { |
| 993 | for (i = 0; i < num_interrupt_in; ++i) { |
| 994 | endpoint = interrupt_in_endpoint[i]; |
| 995 | port = serial->port[i]; |
| 996 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 997 | if (!port->interrupt_in_urb) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 998 | dev_err(&interface->dev, |
| 999 | "No free urbs available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | goto probe_error; |
| 1001 | } |
| 1002 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1003 | port->interrupt_in_endpointAddress = |
| 1004 | endpoint->bEndpointAddress; |
| 1005 | port->interrupt_in_buffer = kmalloc(buffer_size, |
| 1006 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | if (!port->interrupt_in_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1008 | dev_err(&interface->dev, |
| 1009 | "Couldn't allocate interrupt_in_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | goto probe_error; |
| 1011 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1012 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
| 1013 | usb_rcvintpipe(dev, |
| 1014 | endpoint->bEndpointAddress), |
| 1015 | port->interrupt_in_buffer, buffer_size, |
| 1016 | serial->type->read_int_callback, port, |
| 1017 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | } |
| 1019 | } else if (num_interrupt_in) { |
| 1020 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); |
| 1021 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | if (serial->type->write_int_callback) { |
| 1024 | for (i = 0; i < num_interrupt_out; ++i) { |
| 1025 | endpoint = interrupt_out_endpoint[i]; |
| 1026 | port = serial->port[i]; |
| 1027 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1028 | if (!port->interrupt_out_urb) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1029 | dev_err(&interface->dev, |
| 1030 | "No free urbs available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | goto probe_error; |
| 1032 | } |
| 1033 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 1034 | port->interrupt_out_size = buffer_size; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1035 | port->interrupt_out_endpointAddress = |
| 1036 | endpoint->bEndpointAddress; |
| 1037 | port->interrupt_out_buffer = kmalloc(buffer_size, |
| 1038 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | if (!port->interrupt_out_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1040 | dev_err(&interface->dev, |
| 1041 | "Couldn't allocate interrupt_out_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | goto probe_error; |
| 1043 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1044 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
| 1045 | usb_sndintpipe(dev, |
| 1046 | endpoint->bEndpointAddress), |
| 1047 | port->interrupt_out_buffer, buffer_size, |
| 1048 | serial->type->write_int_callback, port, |
| 1049 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | } else if (num_interrupt_out) { |
| 1052 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); |
| 1053 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1054 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | /* if this device type has an attach function, call it */ |
| 1056 | if (type->attach) { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1057 | if (!try_module_get(type->driver.owner)) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1058 | dev_err(&interface->dev, |
| 1059 | "module get failed, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | goto probe_error; |
| 1061 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1062 | retval = type->attach(serial); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1063 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | if (retval < 0) |
| 1065 | goto probe_error; |
| 1066 | if (retval > 0) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1067 | /* quietly accept this device, but don't bind to a |
| 1068 | serial port as it's about to disappear */ |
Alan Stern | 0a3c854 | 2009-05-27 11:25:52 -0400 | [diff] [blame] | 1069 | serial->num_ports = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | goto exit; |
| 1071 | } |
| 1072 | } |
| 1073 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1074 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1075 | dev_err(&interface->dev, "No more free serial devices\n"); |
| 1076 | goto probe_error; |
| 1077 | } |
Oliver Neukum | c744f99 | 2007-02-26 15:43:00 +0100 | [diff] [blame] | 1078 | serial->minor = minor; |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1079 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | /* register all of the individual ports with the driver core */ |
| 1081 | for (i = 0; i < num_ports; ++i) { |
| 1082 | port = serial->port[i]; |
Kay Sievers | 0031a06 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1083 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1084 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1085 | port->dev_state = PORT_REGISTERING; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 1086 | retval = device_add(&port->dev); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1087 | if (retval) { |
Greg Kroah-Hartman | 13f4db9 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 1088 | dev_err(&port->dev, "Error registering port device, " |
| 1089 | "continuing\n"); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1090 | port->dev_state = PORT_UNREGISTERED; |
| 1091 | } else { |
| 1092 | port->dev_state = PORT_REGISTERED; |
| 1093 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | } |
| 1095 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1096 | usb_serial_console_init(debug, minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | |
| 1098 | exit: |
| 1099 | /* success */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1100 | usb_set_intfdata(interface, serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | return 0; |
| 1102 | |
| 1103 | probe_error: |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 1104 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | return -EIO; |
| 1106 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1107 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | |
| 1109 | void usb_serial_disconnect(struct usb_interface *interface) |
| 1110 | { |
| 1111 | int i; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1112 | struct usb_serial *serial = usb_get_intfdata(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | struct device *dev = &interface->dev; |
| 1114 | struct usb_serial_port *port; |
| 1115 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 1116 | usb_serial_console_disconnect(serial); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1117 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1119 | mutex_lock(&serial->disc_mutex); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1120 | usb_set_intfdata(interface, NULL); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1121 | /* must set a flag, to signal subdrivers */ |
| 1122 | serial->disconnected = 1; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1123 | mutex_unlock(&serial->disc_mutex); |
| 1124 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1125 | for (i = 0; i < serial->num_ports; ++i) { |
| 1126 | port = serial->port[i]; |
| 1127 | if (port) { |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1128 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
| 1129 | if (tty) { |
Alan Cox | d2b3918 | 2009-09-19 13:13:23 -0700 | [diff] [blame] | 1130 | tty_vhangup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1131 | tty_kref_put(tty); |
| 1132 | } |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1133 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1134 | cancel_work_sync(&port->work); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1135 | if (port->dev_state == PORT_REGISTERED) { |
| 1136 | |
| 1137 | /* Make sure the port is bound so that the |
| 1138 | * driver's port_remove method is called. |
| 1139 | */ |
| 1140 | if (!port->dev.driver) { |
| 1141 | int rc; |
| 1142 | |
| 1143 | port->dev.driver = |
| 1144 | &serial->type->driver; |
| 1145 | rc = device_bind_driver(&port->dev); |
| 1146 | } |
| 1147 | port->dev_state = PORT_UNREGISTERING; |
| 1148 | device_del(&port->dev); |
| 1149 | port->dev_state = PORT_UNREGISTERED; |
| 1150 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | } |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1153 | serial->type->disconnect(serial); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1154 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame^] | 1155 | /* 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] | 1156 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | dev_info(dev, "device disconnected\n"); |
| 1158 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1159 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1161 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
| 1162 | { |
| 1163 | struct usb_serial *serial = usb_get_intfdata(intf); |
| 1164 | struct usb_serial_port *port; |
| 1165 | int i, r = 0; |
| 1166 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1167 | serial->suspending = 1; |
| 1168 | |
Oliver Neukum | e31c188 | 2007-07-23 08:58:39 +0200 | [diff] [blame] | 1169 | for (i = 0; i < serial->num_ports; ++i) { |
| 1170 | port = serial->port[i]; |
| 1171 | if (port) |
| 1172 | kill_traffic(port); |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1173 | } |
| 1174 | |
| 1175 | if (serial->type->suspend) |
Oliver Neukum | e31c188 | 2007-07-23 08:58:39 +0200 | [diff] [blame] | 1176 | r = serial->type->suspend(serial, message); |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1177 | |
| 1178 | return r; |
| 1179 | } |
| 1180 | EXPORT_SYMBOL(usb_serial_suspend); |
| 1181 | |
| 1182 | int usb_serial_resume(struct usb_interface *intf) |
| 1183 | { |
| 1184 | struct usb_serial *serial = usb_get_intfdata(intf); |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1185 | int rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1186 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1187 | serial->suspending = 0; |
Sarah Sharp | 8abaee2 | 2007-10-25 10:58:43 -0700 | [diff] [blame] | 1188 | if (serial->type->resume) |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1189 | rv = serial->type->resume(serial); |
| 1190 | else |
| 1191 | rv = usb_serial_generic_resume(serial); |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1192 | |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1193 | return rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1194 | } |
| 1195 | EXPORT_SYMBOL(usb_serial_resume); |
| 1196 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1197 | static const struct tty_operations serial_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | .open = serial_open, |
| 1199 | .close = serial_close, |
| 1200 | .write = serial_write, |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1201 | .hangup = serial_hangup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | .write_room = serial_write_room, |
| 1203 | .ioctl = serial_ioctl, |
| 1204 | .set_termios = serial_set_termios, |
| 1205 | .throttle = serial_throttle, |
| 1206 | .unthrottle = serial_unthrottle, |
| 1207 | .break_ctl = serial_break, |
| 1208 | .chars_in_buffer = serial_chars_in_buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | .tiocmget = serial_tiocmget, |
| 1210 | .tiocmset = serial_tiocmset, |
Alan Cox | fe1ae7f | 2009-09-19 13:13:33 -0700 | [diff] [blame] | 1211 | .shutdown = serial_do_free, |
| 1212 | .install = serial_install, |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 1213 | .proc_fops = &serial_proc_fops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | }; |
| 1215 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | struct tty_driver *usb_serial_tty_driver; |
| 1218 | |
| 1219 | static int __init usb_serial_init(void) |
| 1220 | { |
| 1221 | int i; |
| 1222 | int result; |
| 1223 | |
| 1224 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); |
| 1225 | if (!usb_serial_tty_driver) |
| 1226 | return -ENOMEM; |
| 1227 | |
| 1228 | /* Initialize our global data */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1229 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | serial_table[i] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | |
| 1232 | result = bus_register(&usb_serial_bus_type); |
| 1233 | if (result) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1234 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
| 1235 | "failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | goto exit_bus; |
| 1237 | } |
| 1238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | usb_serial_tty_driver->owner = THIS_MODULE; |
| 1240 | usb_serial_tty_driver->driver_name = "usbserial"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | usb_serial_tty_driver->name = "ttyUSB"; |
| 1242 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; |
| 1243 | usb_serial_tty_driver->minor_start = 0; |
| 1244 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 1245 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1246 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
| 1247 | TTY_DRIVER_DYNAMIC_DEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | usb_serial_tty_driver->init_termios = tty_std_termios; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1249 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
| 1250 | | HUPCL | CLOCAL; |
Alan Cox | a5b6f60 | 2008-04-08 17:16:06 +0100 | [diff] [blame] | 1251 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
| 1252 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
| 1254 | result = tty_register_driver(usb_serial_tty_driver); |
| 1255 | if (result) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1256 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
| 1257 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | goto exit_reg_driver; |
| 1259 | } |
| 1260 | |
| 1261 | /* register the USB driver */ |
| 1262 | result = usb_register(&usb_serial_driver); |
| 1263 | if (result < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1264 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
| 1265 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | goto exit_tty; |
| 1267 | } |
| 1268 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1269 | /* register the generic driver, if we should */ |
| 1270 | result = usb_serial_generic_register(debug); |
| 1271 | if (result < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1272 | printk(KERN_ERR "usb-serial: %s - registering generic " |
| 1273 | "driver failed\n", __func__); |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1274 | goto exit_generic; |
| 1275 | } |
| 1276 | |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1277 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | |
| 1279 | return result; |
| 1280 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1281 | exit_generic: |
| 1282 | usb_deregister(&usb_serial_driver); |
| 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | exit_tty: |
| 1285 | tty_unregister_driver(usb_serial_tty_driver); |
| 1286 | |
| 1287 | exit_reg_driver: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | bus_unregister(&usb_serial_bus_type); |
| 1289 | |
| 1290 | exit_bus: |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1291 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
| 1292 | __func__, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | put_tty_driver(usb_serial_tty_driver); |
| 1294 | return result; |
| 1295 | } |
| 1296 | |
| 1297 | |
| 1298 | static void __exit usb_serial_exit(void) |
| 1299 | { |
| 1300 | usb_serial_console_exit(); |
| 1301 | |
| 1302 | usb_serial_generic_deregister(); |
| 1303 | |
| 1304 | usb_deregister(&usb_serial_driver); |
| 1305 | tty_unregister_driver(usb_serial_tty_driver); |
| 1306 | put_tty_driver(usb_serial_tty_driver); |
| 1307 | bus_unregister(&usb_serial_bus_type); |
| 1308 | } |
| 1309 | |
| 1310 | |
| 1311 | module_init(usb_serial_init); |
| 1312 | module_exit(usb_serial_exit); |
| 1313 | |
| 1314 | #define set_to_generic_if_null(type, function) \ |
| 1315 | do { \ |
| 1316 | if (!type->function) { \ |
| 1317 | type->function = usb_serial_generic_##function; \ |
| 1318 | dbg("Had to override the " #function \ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1319 | " usb serial operation with the generic one.");\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | } \ |
| 1321 | } while (0) |
| 1322 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1323 | static void fixup_generic(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | { |
| 1325 | set_to_generic_if_null(device, open); |
| 1326 | set_to_generic_if_null(device, write); |
| 1327 | set_to_generic_if_null(device, close); |
| 1328 | set_to_generic_if_null(device, write_room); |
| 1329 | set_to_generic_if_null(device, chars_in_buffer); |
| 1330 | set_to_generic_if_null(device, read_bulk_callback); |
| 1331 | set_to_generic_if_null(device, write_bulk_callback); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1332 | set_to_generic_if_null(device, disconnect); |
| 1333 | set_to_generic_if_null(device, release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | } |
| 1335 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1336 | int usb_serial_register(struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1338 | /* must be called with BKL held */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | int retval; |
| 1340 | |
Dave Young | e4abe66 | 2009-02-14 21:21:13 +0800 | [diff] [blame] | 1341 | if (usb_disabled()) |
| 1342 | return -ENODEV; |
| 1343 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1344 | fixup_generic(driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1346 | if (!driver->description) |
| 1347 | driver->description = driver->driver.name; |
| 1348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | /* Add this device to our list of devices */ |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1350 | list_add(&driver->driver_list, &usb_serial_driver_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1352 | retval = usb_serial_bus_register(driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | if (retval) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1354 | printk(KERN_ERR "usb-serial: problem %d when registering " |
| 1355 | "driver %s\n", retval, driver->description); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1356 | list_del(&driver->driver_list); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1357 | } else |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1358 | printk(KERN_INFO "USB Serial support registered for %s\n", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1359 | driver->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
| 1361 | return retval; |
| 1362 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1363 | EXPORT_SYMBOL_GPL(usb_serial_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | |
| 1365 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1366 | void usb_serial_deregister(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1368 | /* must be called with BKL held */ |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1369 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
| 1370 | device->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | list_del(&device->driver_list); |
| 1372 | usb_serial_bus_deregister(device); |
| 1373 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | |
| 1376 | /* Module information */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1377 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1378 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | MODULE_LICENSE("GPL"); |
| 1380 | |
| 1381 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 1382 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |