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> |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 38 | #include <linux/kfifo.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "pl2303.h" |
| 40 | |
| 41 | /* |
| 42 | * Version Information |
| 43 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
| 45 | #define DRIVER_DESC "USB Serial Driver core" |
| 46 | |
| 47 | /* Driver structure we register with the USB core */ |
| 48 | static struct usb_driver usb_serial_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | .name = "usbserial", |
| 50 | .probe = usb_serial_probe, |
| 51 | .disconnect = usb_serial_disconnect, |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 52 | .suspend = usb_serial_suspend, |
| 53 | .resume = usb_serial_resume, |
Greg Kroah-Hartman | ba9dc65 | 2005-11-16 13:41:28 -0800 | [diff] [blame] | 54 | .no_dynamic_id = 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 | |
| 64 | static int 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 | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 159 | serial->type->release(serial); |
| 160 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 161 | /* Now that nothing is using the ports, they can be freed */ |
| 162 | for (i = 0; i < serial->num_port_pointers; ++i) { |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 163 | port = serial->port[i]; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 164 | if (port) { |
| 165 | port->serial = NULL; |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 166 | put_device(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | } |
| 169 | |
| 170 | usb_put_dev(serial->dev); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 171 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 174 | void usb_serial_put(struct usb_serial *serial) |
| 175 | { |
| 176 | kref_put(&serial->kref, destroy_serial); |
| 177 | } |
| 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | /***************************************************************************** |
| 180 | * Driver tty interface functions |
| 181 | *****************************************************************************/ |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 182 | |
| 183 | /** |
| 184 | * serial_install - install tty |
| 185 | * @driver: the driver (USB in our case) |
| 186 | * @tty: the tty being created |
| 187 | * |
| 188 | * Create the termios objects for this tty. We use the default |
| 189 | * USB serial settings but permit them to be overridden by |
| 190 | * serial->type->init_termios. |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 191 | * |
| 192 | * This is the first place a new tty gets used. Hence this is where we |
| 193 | * acquire references to the usb_serial structure and the driver module, |
| 194 | * 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^] | 195 | * All these actions are reversed in serial_cleanup(). |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 196 | */ |
| 197 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) |
| 198 | { |
| 199 | int idx = tty->index; |
| 200 | struct usb_serial *serial; |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 201 | struct usb_serial_port *port; |
| 202 | int retval = -ENODEV; |
| 203 | |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 204 | dbg("%s", __func__); |
| 205 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 206 | serial = usb_serial_get_by_index(idx); |
| 207 | if (!serial) |
| 208 | return retval; |
| 209 | |
| 210 | port = serial->port[idx - serial->minor]; |
| 211 | if (!port) |
| 212 | goto error_no_port; |
| 213 | if (!try_module_get(serial->type->driver.owner)) |
| 214 | goto error_module_get; |
| 215 | |
Alan Stern | 7e29bb4 | 2009-09-01 11:39:22 -0400 | [diff] [blame] | 216 | /* perform the standard setup */ |
| 217 | retval = tty_init_termios(tty); |
| 218 | if (retval) |
| 219 | goto error_init_termios; |
| 220 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 221 | retval = usb_autopm_get_interface(serial->interface); |
| 222 | if (retval) |
| 223 | goto error_get_interface; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 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 | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 233 | /* Final install (we use the default method) */ |
| 234 | tty_driver_kref_get(driver); |
| 235 | tty->count++; |
| 236 | driver->ttys[idx] = tty; |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 237 | return retval; |
| 238 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 239 | error_get_interface: |
Alan Stern | 7e29bb4 | 2009-09-01 11:39:22 -0400 | [diff] [blame] | 240 | error_init_termios: |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 241 | module_put(serial->type->driver.owner); |
| 242 | error_module_get: |
| 243 | error_no_port: |
| 244 | usb_serial_put(serial); |
| 245 | mutex_unlock(&serial->disc_mutex); |
| 246 | return retval; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 247 | } |
| 248 | |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 249 | static int serial_open(struct tty_struct *tty, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 251 | struct usb_serial_port *port = tty->driver_data; |
| 252 | struct usb_serial *serial = port->serial; |
| 253 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 255 | dbg("%s - port %d", __func__, port->number); |
| 256 | |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 257 | spin_lock_irq(&port->port.lock); |
| 258 | if (!tty_hung_up_p(filp)) |
| 259 | ++port->port.count; |
| 260 | spin_unlock_irq(&port->port.lock); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 261 | tty_port_tty_set(&port->port, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 263 | /* Do the device-specific open only if the hardware isn't |
| 264 | * already initialized. |
| 265 | */ |
| 266 | if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) { |
| 267 | if (mutex_lock_interruptible(&port->mutex)) |
| 268 | return -ERESTARTSYS; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 269 | mutex_lock(&serial->disc_mutex); |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 270 | if (serial->disconnected) |
| 271 | retval = -ENODEV; |
| 272 | else |
| 273 | retval = port->serial->type->open(tty, port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 274 | mutex_unlock(&serial->disc_mutex); |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 275 | mutex_unlock(&port->mutex); |
| 276 | if (retval) |
| 277 | return retval; |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 278 | set_bit(ASYNCB_INITIALIZED, &port->port.flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 280 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 281 | /* Now do the correct tty layer semantics */ |
| 282 | retval = tty_port_block_til_ready(&port->port, tty, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | return retval; |
| 284 | } |
| 285 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 286 | /** |
Alan Stern | 7455612 | 2009-09-01 11:39:40 -0400 | [diff] [blame] | 287 | * serial_down - shut down hardware |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 288 | * @port: port to shut down |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 289 | * |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 290 | * Shut down a USB serial port unless it is the console. We never |
| 291 | * shut down the console hardware as it will always be in use. |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 292 | */ |
Alan Stern | 7455612 | 2009-09-01 11:39:40 -0400 | [diff] [blame] | 293 | static void serial_down(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | { |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 295 | struct usb_serial_driver *drv = port->serial->type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 297 | /* |
| 298 | * The console is magical. Do not hang up the console hardware |
| 299 | * or there will be tears. |
| 300 | */ |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 301 | if (port->console) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | return; |
| 303 | |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 304 | /* Don't call the close method if the hardware hasn't been |
| 305 | * initialized. |
| 306 | */ |
| 307 | if (!test_and_clear_bit(ASYNCB_INITIALIZED, &port->port.flags)) |
| 308 | return; |
| 309 | |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 310 | mutex_lock(&port->mutex); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 311 | if (drv->close) |
| 312 | drv->close(port); |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 313 | mutex_unlock(&port->mutex); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 314 | } |
| 315 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 316 | static void serial_hangup(struct tty_struct *tty) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 317 | { |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 318 | struct usb_serial_port *port = tty->driver_data; |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 319 | |
| 320 | dbg("%s - port %d", __func__, port->number); |
| 321 | |
Alan Stern | 7455612 | 2009-09-01 11:39:40 -0400 | [diff] [blame] | 322 | serial_down(port); |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 323 | tty_port_hangup(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | static void serial_close(struct tty_struct *tty, struct file *filp) |
| 327 | { |
| 328 | struct usb_serial_port *port = tty->driver_data; |
| 329 | |
| 330 | dbg("%s - port %d", __func__, port->number); |
| 331 | |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 332 | if (tty_hung_up_p(filp)) |
| 333 | return; |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 334 | if (tty_port_close_start(&port->port, tty, filp) == 0) |
| 335 | return; |
Alan Stern | 7455612 | 2009-09-01 11:39:40 -0400 | [diff] [blame] | 336 | serial_down(port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 337 | tty_port_close_end(&port->port, tty); |
| 338 | tty_port_tty_set(&port->port, NULL); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 339 | } |
| 340 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 341 | /** |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame^] | 342 | * serial_cleanup - free resources post close/hangup |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 343 | * @port: port to free up |
| 344 | * |
| 345 | * Do the resource freeing and refcount dropping for the port. |
| 346 | * Avoid freeing the console. |
| 347 | * |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame^] | 348 | * Called asynchronously after the last tty kref is dropped, |
| 349 | * and the tty layer has already done the tty_shutdown(tty); |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 350 | */ |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame^] | 351 | static void serial_cleanup(struct tty_struct *tty) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 352 | { |
| 353 | struct usb_serial_port *port = tty->driver_data; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 354 | struct usb_serial *serial; |
| 355 | struct module *owner; |
| 356 | |
| 357 | /* The console is magical. Do not hang up the console hardware |
| 358 | * or there will be tears. |
| 359 | */ |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 360 | if (port->console) |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 361 | return; |
| 362 | |
Alan Stern | ff8324d | 2009-09-01 11:39:51 -0400 | [diff] [blame] | 363 | dbg("%s - port %d", __func__, port->number); |
| 364 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 365 | tty->driver_data = NULL; |
| 366 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 367 | serial = port->serial; |
| 368 | owner = serial->type->driver.owner; |
| 369 | |
| 370 | mutex_lock(&serial->disc_mutex); |
| 371 | if (!serial->disconnected) |
| 372 | usb_autopm_put_interface(serial->interface); |
| 373 | mutex_unlock(&serial->disc_mutex); |
| 374 | |
| 375 | usb_serial_put(serial); |
| 376 | module_put(owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
| 378 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 379 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
| 380 | int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 382 | struct usb_serial_port *port = tty->driver_data; |
Oliver Neukum | 3ff4fd9 | 2007-01-13 07:32:27 +0100 | [diff] [blame] | 383 | int retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 385 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
Luiz Fernando Capitulino | 487f9c6 | 2005-11-28 19:16:05 -0200 | [diff] [blame] | 386 | goto exit; |
| 387 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 388 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 390 | /* count is managed under the mutex lock for the tty so cannot |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 391 | drop to zero until after the last close completes */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 392 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
| 394 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 395 | retval = port->serial->type->write(tty, port, buf, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
| 397 | exit: |
| 398 | return retval; |
| 399 | } |
| 400 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 401 | static int serial_write_room(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 403 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 404 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 405 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 407 | return port->serial->type->write_room(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 int serial_chars_in_buffer(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 | eff6937 | 2009-01-02 13:47:06 +0000 | [diff] [blame] | 415 | /* if the device was unplugged then any remaining characters |
| 416 | fell out of the connector ;) */ |
| 417 | if (port->serial->disconnected) |
| 418 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 420 | return port->serial->type->chars_in_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | } |
| 422 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 423 | static void serial_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 425 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 426 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 428 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | /* pass on to the driver specific version of this function */ |
| 430 | if (port->serial->type->throttle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 431 | port->serial->type->throttle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | } |
| 433 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 434 | static void serial_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 436 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 437 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 439 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | /* pass on to the driver specific version of this function */ |
| 441 | if (port->serial->type->unthrottle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 442 | port->serial->type->unthrottle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | } |
| 444 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 445 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
| 446 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 448 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | int retval = -ENODEV; |
| 450 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 451 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 453 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 455 | /* pass on to the driver specific version of this function |
| 456 | if it is available */ |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 457 | if (port->serial->type->ioctl) { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 458 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 459 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | retval = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | return retval; |
| 462 | } |
| 463 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 464 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 466 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 467 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 469 | WARN_ON(!port->port.count); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 470 | /* pass on to the driver specific version of this function |
| 471 | if it is available */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | if (port->serial->type->set_termios) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 473 | port->serial->type->set_termios(tty, port, old); |
Alan Cox | 3378509 | 2007-10-18 01:24:22 -0700 | [diff] [blame] | 474 | else |
| 475 | tty_termios_copy_hw(tty->termios, old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
| 477 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 478 | static int serial_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 480 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 482 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 484 | WARN_ON(!port->port.count); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 485 | /* pass on to the driver specific version of this function |
| 486 | if it is available */ |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 487 | if (port->serial->type->break_ctl) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 488 | port->serial->type->break_ctl(tty, break_state); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 489 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | } |
| 491 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 492 | static int serial_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
| 494 | struct usb_serial *serial; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | char tmp[40]; |
| 497 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 498 | dbg("%s", __func__); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 499 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
| 500 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | serial = usb_serial_get_by_index(i); |
| 502 | if (serial == NULL) |
| 503 | continue; |
| 504 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 505 | seq_printf(m, "%d:", i); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 506 | if (serial->type->driver.owner) |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 507 | seq_printf(m, " module:%s", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 508 | module_name(serial->type->driver.owner)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 509 | seq_printf(m, " name:\"%s\"", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 510 | serial->type->description); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 511 | seq_printf(m, " vendor:%04x product:%04x", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 512 | le16_to_cpu(serial->dev->descriptor.idVendor), |
| 513 | le16_to_cpu(serial->dev->descriptor.idProduct)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 514 | seq_printf(m, " num_ports:%d", serial->num_ports); |
| 515 | seq_printf(m, " port:%d", i - serial->minor + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 517 | seq_printf(m, " path:%s", tmp); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 518 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 519 | seq_putc(m, '\n'); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 520 | usb_serial_put(serial); |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 521 | mutex_unlock(&serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 523 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } |
| 525 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 526 | static int serial_proc_open(struct inode *inode, struct file *file) |
| 527 | { |
| 528 | return single_open(file, serial_proc_show, NULL); |
| 529 | } |
| 530 | |
| 531 | static const struct file_operations serial_proc_fops = { |
| 532 | .owner = THIS_MODULE, |
| 533 | .open = serial_proc_open, |
| 534 | .read = seq_read, |
| 535 | .llseek = seq_lseek, |
| 536 | .release = single_release, |
| 537 | }; |
| 538 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 539 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 541 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 543 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 545 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | if (port->serial->type->tiocmget) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 547 | return port->serial->type->tiocmget(tty, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | return -EINVAL; |
| 549 | } |
| 550 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 551 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | unsigned int set, unsigned int clear) |
| 553 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 554 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 556 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 558 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | if (port->serial->type->tiocmset) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 560 | return port->serial->type->tiocmset(tty, file, set, clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | return -EINVAL; |
| 562 | } |
| 563 | |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 564 | /* |
| 565 | * We would be calling tty_wakeup here, but unfortunately some line |
| 566 | * disciplines have an annoying habit of calling tty->write from |
| 567 | * the write wakeup callback (e.g. n_hdlc.c). |
| 568 | */ |
| 569 | void usb_serial_port_softint(struct usb_serial_port *port) |
| 570 | { |
| 571 | schedule_work(&port->work); |
| 572 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 573 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 574 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 575 | static void usb_serial_port_work(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 577 | struct usb_serial_port *port = |
| 578 | container_of(work, struct usb_serial_port, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | struct tty_struct *tty; |
| 580 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 581 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 582 | |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 583 | tty = tty_port_tty_get(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if (!tty) |
| 585 | return; |
| 586 | |
| 587 | tty_wakeup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 588 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 591 | static void kill_traffic(struct usb_serial_port *port) |
Pete Zaitcev | 34f8e76 | 2006-06-21 15:00:45 -0700 | [diff] [blame] | 592 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | usb_kill_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | usb_kill_urb(port->write_urb); |
Oliver Neukum | 5adceac | 2007-08-17 14:01:38 +0200 | [diff] [blame] | 595 | /* |
| 596 | * This is tricky. |
| 597 | * Some drivers submit the read_urb in the |
| 598 | * handler for the write_urb or vice versa |
| 599 | * this order determines the order in which |
| 600 | * usb_kill_urb() must be used to reliably |
| 601 | * kill the URBs. As it is unknown here, |
| 602 | * both orders must be used in turn. |
| 603 | * The call below is not redundant. |
| 604 | */ |
| 605 | usb_kill_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | usb_kill_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | usb_kill_urb(port->interrupt_out_urb); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 608 | } |
| 609 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 610 | static void port_release(struct device *dev) |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 611 | { |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 612 | struct usb_serial_port *port = to_usb_serial_port(dev); |
| 613 | |
| 614 | dbg ("%s - %s", __func__, dev_name(dev)); |
| 615 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 616 | /* |
| 617 | * Stop all the traffic before cancelling the work, so that |
| 618 | * nobody will restart it by calling usb_serial_port_softint. |
| 619 | */ |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 620 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 621 | cancel_work_sync(&port->work); |
| 622 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 623 | usb_free_urb(port->read_urb); |
| 624 | usb_free_urb(port->write_urb); |
| 625 | usb_free_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | usb_free_urb(port->interrupt_out_urb); |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 627 | if (!IS_ERR(port->write_fifo) && port->write_fifo) |
| 628 | kfifo_free(port->write_fifo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | kfree(port->bulk_in_buffer); |
| 630 | kfree(port->bulk_out_buffer); |
| 631 | kfree(port->interrupt_in_buffer); |
| 632 | kfree(port->interrupt_out_buffer); |
| 633 | kfree(port); |
| 634 | } |
| 635 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 636 | static struct usb_serial *create_serial(struct usb_device *dev, |
| 637 | struct usb_interface *interface, |
| 638 | struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | { |
| 640 | struct usb_serial *serial; |
| 641 | |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 642 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | if (!serial) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 644 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | return NULL; |
| 646 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | serial->dev = usb_get_dev(dev); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 648 | serial->type = driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | serial->interface = interface; |
| 650 | kref_init(&serial->kref); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 651 | mutex_init(&serial->disc_mutex); |
Alan Stern | 0282b7f | 2008-07-29 12:01:04 -0400 | [diff] [blame] | 652 | serial->minor = SERIAL_TTY_NO_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
| 654 | return serial; |
| 655 | } |
| 656 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 657 | 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] | 658 | struct usb_serial_driver *drv) |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 659 | { |
| 660 | struct usb_dynid *dynid; |
| 661 | |
| 662 | spin_lock(&drv->dynids.lock); |
| 663 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 664 | if (usb_match_one_id(intf, &dynid->id)) { |
| 665 | spin_unlock(&drv->dynids.lock); |
| 666 | return &dynid->id; |
| 667 | } |
| 668 | } |
| 669 | spin_unlock(&drv->dynids.lock); |
| 670 | return NULL; |
| 671 | } |
| 672 | |
| 673 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, |
| 674 | struct usb_interface *intf) |
| 675 | { |
| 676 | const struct usb_device_id *id; |
| 677 | |
| 678 | id = usb_match_id(intf, drv->id_table); |
| 679 | if (id) { |
| 680 | dbg("static descriptor matches"); |
| 681 | goto exit; |
| 682 | } |
| 683 | id = match_dynamic_id(intf, drv); |
| 684 | if (id) |
| 685 | dbg("dynamic descriptor matches"); |
| 686 | exit: |
| 687 | return id; |
| 688 | } |
| 689 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 690 | static struct usb_serial_driver *search_serial_device( |
| 691 | struct usb_interface *iface) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | const struct usb_device_id *id; |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 694 | struct usb_serial_driver *drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
Adrian Bunk | 93b1fae | 2006-01-10 00:13:33 +0100 | [diff] [blame] | 696 | /* Check if the usb id matches a known device */ |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 697 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
| 698 | id = get_iface_id(drv, iface); |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 699 | if (id) |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 700 | return drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | return NULL; |
| 704 | } |
| 705 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 706 | static int serial_carrier_raised(struct tty_port *port) |
| 707 | { |
| 708 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 709 | struct usb_serial_driver *drv = p->serial->type; |
| 710 | if (drv->carrier_raised) |
| 711 | return drv->carrier_raised(p); |
| 712 | /* No carrier control - don't block */ |
| 713 | return 1; |
| 714 | } |
| 715 | |
| 716 | static void serial_dtr_rts(struct tty_port *port, int on) |
| 717 | { |
| 718 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 719 | struct usb_serial_driver *drv = p->serial->type; |
| 720 | if (drv->dtr_rts) |
| 721 | drv->dtr_rts(p, on); |
| 722 | } |
| 723 | |
| 724 | static const struct tty_port_operations serial_port_ops = { |
| 725 | .carrier_raised = serial_carrier_raised, |
| 726 | .dtr_rts = serial_dtr_rts, |
| 727 | }; |
| 728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | int usb_serial_probe(struct usb_interface *interface, |
| 730 | const struct usb_device_id *id) |
| 731 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 732 | struct usb_device *dev = interface_to_usbdev(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | struct usb_serial *serial = NULL; |
| 734 | struct usb_serial_port *port; |
| 735 | struct usb_host_interface *iface_desc; |
| 736 | struct usb_endpoint_descriptor *endpoint; |
| 737 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; |
| 738 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; |
| 739 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; |
| 740 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 741 | struct usb_serial_driver *type = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | int retval; |
Andre Haupt | dd9ca5d | 2008-06-18 15:56:00 +0200 | [diff] [blame] | 743 | unsigned int minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | int buffer_size; |
| 745 | int i; |
| 746 | int num_interrupt_in = 0; |
| 747 | int num_interrupt_out = 0; |
| 748 | int num_bulk_in = 0; |
| 749 | int num_bulk_out = 0; |
| 750 | int num_ports = 0; |
| 751 | int max_endpoints; |
| 752 | |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 753 | lock_kernel(); /* guard against unloading a serial driver module */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | type = search_serial_device(interface); |
| 755 | if (!type) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 756 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | dbg("none matched"); |
| 758 | return -ENODEV; |
| 759 | } |
| 760 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 761 | serial = create_serial(dev, interface, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | if (!serial) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 763 | unlock_kernel(); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 764 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | return -ENOMEM; |
| 766 | } |
| 767 | |
| 768 | /* if this device type has a probe function, call it */ |
| 769 | if (type->probe) { |
| 770 | const struct usb_device_id *id; |
| 771 | |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 772 | if (!try_module_get(type->driver.owner)) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 773 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 774 | dev_err(&interface->dev, |
| 775 | "module get failed, exiting\n"); |
| 776 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | return -EIO; |
| 778 | } |
| 779 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 780 | id = get_iface_id(type, interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | retval = type->probe(serial, id); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 782 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | |
| 784 | if (retval) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 785 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 786 | dbg("sub driver rejected device"); |
| 787 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | return retval; |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | /* descriptor matches, let's find the endpoints needed */ |
| 793 | /* check out the endpoints */ |
| 794 | iface_desc = interface->cur_altsetting; |
| 795 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 796 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 797 | |
| 798 | if (usb_endpoint_is_bulk_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | /* we found a bulk in endpoint */ |
| 800 | dbg("found bulk in on endpoint %d", i); |
| 801 | bulk_in_endpoint[num_bulk_in] = endpoint; |
| 802 | ++num_bulk_in; |
| 803 | } |
| 804 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 805 | if (usb_endpoint_is_bulk_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | /* we found a bulk out endpoint */ |
| 807 | dbg("found bulk out on endpoint %d", i); |
| 808 | bulk_out_endpoint[num_bulk_out] = endpoint; |
| 809 | ++num_bulk_out; |
| 810 | } |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 811 | |
| 812 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | /* we found a interrupt in endpoint */ |
| 814 | dbg("found interrupt in on endpoint %d", i); |
| 815 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 816 | ++num_interrupt_in; |
| 817 | } |
| 818 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 819 | if (usb_endpoint_is_int_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | /* we found an interrupt out endpoint */ |
| 821 | dbg("found interrupt out on endpoint %d", i); |
| 822 | interrupt_out_endpoint[num_interrupt_out] = endpoint; |
| 823 | ++num_interrupt_out; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 828 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | /* this is needed due to the looney way its endpoints are set up */ |
| 830 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && |
| 831 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || |
| 832 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && |
Johannes Steingraeber | 8fd8013 | 2006-09-16 16:17:34 +0200 | [diff] [blame] | 833 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
| 834 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && |
Andreas Bombe | ce816cf | 2008-09-14 01:58:55 +0200 | [diff] [blame] | 835 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
| 836 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && |
| 837 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | if (interface != dev->actconfig->interface[0]) { |
| 839 | /* check out the endpoints of the other interface*/ |
| 840 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; |
| 841 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 842 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 843 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | /* we found a interrupt in endpoint */ |
| 845 | dbg("found interrupt in for Prolific device on separate interface"); |
| 846 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 847 | ++num_interrupt_in; |
| 848 | } |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | /* Now make sure the PL-2303 is configured correctly. |
| 853 | * If not, give up now and hope this hack will work |
| 854 | * properly during a later invocation of usb_serial_probe |
| 855 | */ |
| 856 | if (num_bulk_in == 0 || num_bulk_out == 0) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 857 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | 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] | 859 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | return -ENODEV; |
| 861 | } |
| 862 | } |
| 863 | /* END HORRIBLE HACK FOR PL2303 */ |
| 864 | #endif |
| 865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | #ifdef CONFIG_USB_SERIAL_GENERIC |
| 867 | if (type == &usb_serial_generic_device) { |
| 868 | num_ports = num_bulk_out; |
| 869 | if (num_ports == 0) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 870 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 871 | dev_err(&interface->dev, |
| 872 | "Generic device with no bulk out, not allowed.\n"); |
| 873 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | return -EIO; |
| 875 | } |
| 876 | } |
| 877 | #endif |
| 878 | if (!num_ports) { |
| 879 | /* if this device type has a calc_num_ports function, call it */ |
| 880 | if (type->calc_num_ports) { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 881 | if (!try_module_get(type->driver.owner)) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 882 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 883 | dev_err(&interface->dev, |
| 884 | "module get failed, exiting\n"); |
| 885 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | return -EIO; |
| 887 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 888 | num_ports = type->calc_num_ports(serial); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 889 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | if (!num_ports) |
| 892 | num_ports = type->num_ports; |
| 893 | } |
| 894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | serial->num_ports = num_ports; |
| 896 | serial->num_bulk_in = num_bulk_in; |
| 897 | serial->num_bulk_out = num_bulk_out; |
| 898 | serial->num_interrupt_in = num_interrupt_in; |
| 899 | serial->num_interrupt_out = num_interrupt_out; |
| 900 | |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 901 | /* found all that we need */ |
| 902 | dev_info(&interface->dev, "%s converter detected\n", |
| 903 | type->description); |
| 904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | /* create our ports, we need as many as the max endpoints */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 906 | /* we don't use num_ports here because some devices have more |
| 907 | endpoint pairs than ports */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | max_endpoints = max(num_bulk_in, num_bulk_out); |
| 909 | max_endpoints = max(max_endpoints, num_interrupt_in); |
| 910 | max_endpoints = max(max_endpoints, num_interrupt_out); |
| 911 | max_endpoints = max(max_endpoints, (int)serial->num_ports); |
| 912 | serial->num_port_pointers = max_endpoints; |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 913 | unlock_kernel(); |
| 914 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 915 | dbg("%s - setting up %d port structures for this device", |
| 916 | __func__, max_endpoints); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | for (i = 0; i < max_endpoints; ++i) { |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 918 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | if (!port) |
| 920 | goto probe_error; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 921 | tty_port_init(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 922 | port->port.ops = &serial_port_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | port->serial = serial; |
Greg Kroah-Hartman | 507ca9b | 2005-04-23 12:49:16 -0700 | [diff] [blame] | 924 | spin_lock_init(&port->lock); |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 925 | mutex_init(&port->mutex); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 926 | INIT_WORK(&port->work, usb_serial_port_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | serial->port[i] = port; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 928 | port->dev.parent = &interface->dev; |
| 929 | port->dev.driver = NULL; |
| 930 | port->dev.bus = &usb_serial_bus_type; |
| 931 | port->dev.release = &port_release; |
| 932 | device_initialize(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | /* set up the endpoint information */ |
| 936 | for (i = 0; i < num_bulk_in; ++i) { |
| 937 | endpoint = bulk_in_endpoint[i]; |
| 938 | port = serial->port[i]; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 939 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | if (!port->read_urb) { |
| 941 | dev_err(&interface->dev, "No free urbs available\n"); |
| 942 | goto probe_error; |
| 943 | } |
| 944 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 945 | port->bulk_in_size = buffer_size; |
| 946 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 947 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | if (!port->bulk_in_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 949 | dev_err(&interface->dev, |
| 950 | "Couldn't allocate bulk_in_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | goto probe_error; |
| 952 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 953 | usb_fill_bulk_urb(port->read_urb, dev, |
| 954 | usb_rcvbulkpipe(dev, |
| 955 | endpoint->bEndpointAddress), |
| 956 | port->bulk_in_buffer, buffer_size, |
| 957 | serial->type->read_bulk_callback, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | |
| 960 | for (i = 0; i < num_bulk_out; ++i) { |
| 961 | endpoint = bulk_out_endpoint[i]; |
| 962 | port = serial->port[i]; |
| 963 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 964 | if (!port->write_urb) { |
| 965 | dev_err(&interface->dev, "No free urbs available\n"); |
| 966 | goto probe_error; |
| 967 | } |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 968 | port->write_fifo = kfifo_alloc(PAGE_SIZE, GFP_KERNEL, |
| 969 | &port->lock); |
| 970 | if (IS_ERR(port->write_fifo)) |
| 971 | goto probe_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 973 | port->bulk_out_size = buffer_size; |
| 974 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 975 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | if (!port->bulk_out_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 977 | dev_err(&interface->dev, |
| 978 | "Couldn't allocate bulk_out_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | goto probe_error; |
| 980 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 981 | usb_fill_bulk_urb(port->write_urb, dev, |
| 982 | usb_sndbulkpipe(dev, |
| 983 | endpoint->bEndpointAddress), |
| 984 | port->bulk_out_buffer, buffer_size, |
| 985 | serial->type->write_bulk_callback, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | if (serial->type->read_int_callback) { |
| 989 | for (i = 0; i < num_interrupt_in; ++i) { |
| 990 | endpoint = interrupt_in_endpoint[i]; |
| 991 | port = serial->port[i]; |
| 992 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 993 | if (!port->interrupt_in_urb) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 994 | dev_err(&interface->dev, |
| 995 | "No free urbs available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | goto probe_error; |
| 997 | } |
| 998 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 999 | port->interrupt_in_endpointAddress = |
| 1000 | endpoint->bEndpointAddress; |
| 1001 | port->interrupt_in_buffer = kmalloc(buffer_size, |
| 1002 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | if (!port->interrupt_in_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1004 | dev_err(&interface->dev, |
| 1005 | "Couldn't allocate interrupt_in_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | goto probe_error; |
| 1007 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1008 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
| 1009 | usb_rcvintpipe(dev, |
| 1010 | endpoint->bEndpointAddress), |
| 1011 | port->interrupt_in_buffer, buffer_size, |
| 1012 | serial->type->read_int_callback, port, |
| 1013 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } |
| 1015 | } else if (num_interrupt_in) { |
| 1016 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); |
| 1017 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1018 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | if (serial->type->write_int_callback) { |
| 1020 | for (i = 0; i < num_interrupt_out; ++i) { |
| 1021 | endpoint = interrupt_out_endpoint[i]; |
| 1022 | port = serial->port[i]; |
| 1023 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1024 | if (!port->interrupt_out_urb) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1025 | dev_err(&interface->dev, |
| 1026 | "No free urbs available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | goto probe_error; |
| 1028 | } |
| 1029 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 1030 | port->interrupt_out_size = buffer_size; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1031 | port->interrupt_out_endpointAddress = |
| 1032 | endpoint->bEndpointAddress; |
| 1033 | port->interrupt_out_buffer = kmalloc(buffer_size, |
| 1034 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | if (!port->interrupt_out_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1036 | dev_err(&interface->dev, |
| 1037 | "Couldn't allocate interrupt_out_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | goto probe_error; |
| 1039 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1040 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
| 1041 | usb_sndintpipe(dev, |
| 1042 | endpoint->bEndpointAddress), |
| 1043 | port->interrupt_out_buffer, buffer_size, |
| 1044 | serial->type->write_int_callback, port, |
| 1045 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | } |
| 1047 | } else if (num_interrupt_out) { |
| 1048 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); |
| 1049 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1050 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | /* if this device type has an attach function, call it */ |
| 1052 | if (type->attach) { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1053 | if (!try_module_get(type->driver.owner)) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1054 | dev_err(&interface->dev, |
| 1055 | "module get failed, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | goto probe_error; |
| 1057 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1058 | retval = type->attach(serial); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1059 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | if (retval < 0) |
| 1061 | goto probe_error; |
| 1062 | if (retval > 0) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1063 | /* quietly accept this device, but don't bind to a |
| 1064 | serial port as it's about to disappear */ |
Alan Stern | 0a3c854 | 2009-05-27 11:25:52 -0400 | [diff] [blame] | 1065 | serial->num_ports = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | goto exit; |
| 1067 | } |
| 1068 | } |
| 1069 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1070 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1071 | dev_err(&interface->dev, "No more free serial devices\n"); |
| 1072 | goto probe_error; |
| 1073 | } |
Oliver Neukum | c744f99 | 2007-02-26 15:43:00 +0100 | [diff] [blame] | 1074 | serial->minor = minor; |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | /* register all of the individual ports with the driver core */ |
| 1077 | for (i = 0; i < num_ports; ++i) { |
| 1078 | port = serial->port[i]; |
Kay Sievers | 0031a06 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1079 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1080 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1081 | port->dev_state = PORT_REGISTERING; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1082 | retval = device_add(&port->dev); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1083 | if (retval) { |
Greg Kroah-Hartman | 13f4db9 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 1084 | dev_err(&port->dev, "Error registering port device, " |
| 1085 | "continuing\n"); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1086 | port->dev_state = PORT_UNREGISTERED; |
| 1087 | } else { |
| 1088 | port->dev_state = PORT_REGISTERED; |
| 1089 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | } |
| 1091 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1092 | usb_serial_console_init(debug, minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | |
| 1094 | exit: |
| 1095 | /* success */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1096 | usb_set_intfdata(interface, serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | return 0; |
| 1098 | |
| 1099 | probe_error: |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1100 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | return -EIO; |
| 1102 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1103 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | void usb_serial_disconnect(struct usb_interface *interface) |
| 1106 | { |
| 1107 | int i; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1108 | struct usb_serial *serial = usb_get_intfdata(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | struct device *dev = &interface->dev; |
| 1110 | struct usb_serial_port *port; |
| 1111 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 1112 | usb_serial_console_disconnect(serial); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1113 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1115 | mutex_lock(&serial->disc_mutex); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1116 | usb_set_intfdata(interface, NULL); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1117 | /* must set a flag, to signal subdrivers */ |
| 1118 | serial->disconnected = 1; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1119 | mutex_unlock(&serial->disc_mutex); |
| 1120 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1121 | for (i = 0; i < serial->num_ports; ++i) { |
| 1122 | port = serial->port[i]; |
| 1123 | if (port) { |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1124 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
| 1125 | if (tty) { |
Alan Cox | d2b3918 | 2009-09-19 13:13:23 -0700 | [diff] [blame] | 1126 | tty_vhangup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1127 | tty_kref_put(tty); |
| 1128 | } |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1129 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1130 | cancel_work_sync(&port->work); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1131 | if (port->dev_state == PORT_REGISTERED) { |
| 1132 | |
| 1133 | /* Make sure the port is bound so that the |
| 1134 | * driver's port_remove method is called. |
| 1135 | */ |
| 1136 | if (!port->dev.driver) { |
| 1137 | int rc; |
| 1138 | |
| 1139 | port->dev.driver = |
| 1140 | &serial->type->driver; |
| 1141 | rc = device_bind_driver(&port->dev); |
| 1142 | } |
| 1143 | port->dev_state = PORT_UNREGISTERING; |
| 1144 | device_del(&port->dev); |
| 1145 | port->dev_state = PORT_UNREGISTERED; |
| 1146 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | } |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1149 | serial->type->disconnect(serial); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1150 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1151 | /* 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] | 1152 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | dev_info(dev, "device disconnected\n"); |
| 1154 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1155 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1157 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
| 1158 | { |
| 1159 | struct usb_serial *serial = usb_get_intfdata(intf); |
| 1160 | struct usb_serial_port *port; |
| 1161 | int i, r = 0; |
| 1162 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1163 | serial->suspending = 1; |
| 1164 | |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1165 | if (serial->type->suspend) { |
| 1166 | r = serial->type->suspend(serial, message); |
| 1167 | if (r < 0) |
| 1168 | goto err_out; |
| 1169 | } |
| 1170 | |
Oliver Neukum | e31c188 | 2007-07-23 08:58:39 +0200 | [diff] [blame] | 1171 | for (i = 0; i < serial->num_ports; ++i) { |
| 1172 | port = serial->port[i]; |
| 1173 | if (port) |
| 1174 | kill_traffic(port); |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1175 | } |
| 1176 | |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1177 | err_out: |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 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, |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame^] | 1211 | .cleanup = serial_cleanup, |
Alan Cox | fe1ae7f | 2009-09-19 13:13:33 -0700 | [diff] [blame] | 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"); |