Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * USB Serial Converter driver |
| 3 | * |
Greg Kroah-Hartman | 502b95c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 4 | * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
| 6 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License version |
| 10 | * 2 as published by the Free Software Foundation. |
| 11 | * |
Greg Kroah-Hartman | 502b95c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 12 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * based on a driver by Brad Keryan) |
| 14 | * |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 15 | * See Documentation/usb/usb-serial.txt for more information on using this |
| 16 | * driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | */ |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/kernel.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/tty.h> |
| 25 | #include <linux/tty_driver.h> |
| 26 | #include <linux/tty_flip.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/moduleparam.h> |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 29 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/spinlock.h> |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 31 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/list.h> |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 33 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 35 | #include <linux/usb/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "pl2303.h" |
| 37 | |
| 38 | /* |
| 39 | * Version Information |
| 40 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
| 42 | #define DRIVER_DESC "USB Serial Driver core" |
| 43 | |
Pete Zaitcev | 34f8e76 | 2006-06-21 15:00:45 -0700 | [diff] [blame] | 44 | static void port_free(struct usb_serial_port *port); |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 146 | for (i = 0; i < serial->num_ports; ++i) { |
| 147 | port = serial->port[i]; |
| 148 | if (port) |
| 149 | put_device(&port->dev); |
| 150 | } |
| 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | /* If this is a "fake" port, we have to clean it up here, as it will |
| 153 | * not get cleaned up in port_release() as it was never registered with |
| 154 | * the driver core */ |
| 155 | if (serial->num_ports < serial->num_port_pointers) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 156 | for (i = serial->num_ports; |
| 157 | i < serial->num_port_pointers; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | port = serial->port[i]; |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 159 | if (port) |
| 160 | port_free(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
| 162 | } |
| 163 | |
| 164 | usb_put_dev(serial->dev); |
| 165 | |
| 166 | /* free up any memory that we allocated */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 167 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 170 | void usb_serial_put(struct usb_serial *serial) |
| 171 | { |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 172 | mutex_lock(&table_lock); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 173 | kref_put(&serial->kref, destroy_serial); |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 174 | mutex_unlock(&table_lock); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 175 | } |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | /***************************************************************************** |
| 178 | * Driver tty interface functions |
| 179 | *****************************************************************************/ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 180 | static int serial_open (struct tty_struct *tty, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | { |
| 182 | struct usb_serial *serial; |
| 183 | struct usb_serial_port *port; |
| 184 | unsigned int portNumber; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 185 | int retval = 0; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 186 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 187 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
| 189 | /* get the serial object associated with this tty pointer */ |
| 190 | serial = usb_serial_get_by_index(tty->index); |
| 191 | if (!serial) { |
| 192 | tty->driver_data = NULL; |
| 193 | return -ENODEV; |
| 194 | } |
| 195 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 196 | mutex_lock(&serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | portNumber = tty->index - serial->minor; |
| 198 | port = serial->port[portNumber]; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 199 | if (!port || serial->disconnected) |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 200 | retval = -ENODEV; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 201 | else |
| 202 | get_device(&port->dev); |
| 203 | /* |
| 204 | * Note: Our locking order requirement does not allow port->mutex |
| 205 | * to be acquired while serial->disc_mutex is held. |
| 206 | */ |
| 207 | mutex_unlock(&serial->disc_mutex); |
| 208 | if (retval) |
| 209 | goto bailout_serial_put; |
James Woodcock | 331879f | 2009-02-11 15:06:53 +0000 | [diff] [blame] | 210 | |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 211 | if (mutex_lock_interruptible(&port->mutex)) { |
| 212 | retval = -ERESTARTSYS; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 213 | goto bailout_port_put; |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 214 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 215 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 216 | ++port->port.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Paul Fulghum | ca85485 | 2006-04-13 22:28:17 +0200 | [diff] [blame] | 218 | /* set up our port structure making the tty driver |
| 219 | * remember our port object, and us it */ |
| 220 | tty->driver_data = port; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 221 | tty_port_tty_set(&port->port, tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 223 | if (port->port.count == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
| 225 | /* lock this module before we call it |
| 226 | * this may fail, which means we must bail out, |
| 227 | * safe because we are called with BKL held */ |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 228 | if (!try_module_get(serial->type->driver.owner)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | retval = -ENODEV; |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 230 | goto bailout_mutex_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 233 | mutex_lock(&serial->disc_mutex); |
| 234 | if (serial->disconnected) |
| 235 | retval = -ENODEV; |
| 236 | else |
| 237 | retval = usb_autopm_get_interface(serial->interface); |
Sarah Sharp | f0fbd5b | 2007-11-13 17:10:09 -0800 | [diff] [blame] | 238 | if (retval) |
| 239 | goto bailout_module_put; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 240 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 241 | /* only call the device specific open if this |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | * is the first time the port is opened */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 243 | retval = serial->type->open(tty, port, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | if (retval) |
Sarah Sharp | f0fbd5b | 2007-11-13 17:10:09 -0800 | [diff] [blame] | 245 | goto bailout_interface_put; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 246 | mutex_unlock(&serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 248 | mutex_unlock(&port->mutex); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 249 | /* Now do the correct tty layer semantics */ |
| 250 | retval = tty_port_block_til_ready(&port->port, tty, filp); |
| 251 | if (retval == 0) |
| 252 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Sarah Sharp | f0fbd5b | 2007-11-13 17:10:09 -0800 | [diff] [blame] | 254 | bailout_interface_put: |
| 255 | usb_autopm_put_interface(serial->interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | bailout_module_put: |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 257 | mutex_unlock(&serial->disc_mutex); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 258 | module_put(serial->type->driver.owner); |
Luiz Fernando Capitulino | 71a8416 | 2006-05-11 22:34:24 -0300 | [diff] [blame] | 259 | bailout_mutex_unlock: |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 260 | port->port.count = 0; |
Frank Gevaerts | b059c81 | 2006-06-14 15:52:05 +0200 | [diff] [blame] | 261 | tty->driver_data = NULL; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 262 | tty_port_tty_set(&port->port, NULL); |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 263 | mutex_unlock(&port->mutex); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 264 | bailout_port_put: |
| 265 | put_device(&port->dev); |
| 266 | bailout_serial_put: |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 267 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | return retval; |
| 269 | } |
| 270 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 271 | /** |
| 272 | * serial_do_down - shut down hardware |
| 273 | * @port: port to shut down |
| 274 | * |
| 275 | * Shut down a USB port unless it is the console. We never shut down the |
| 276 | * console hardware as it will always be in use. |
| 277 | * |
| 278 | * Don't free any resources at this point |
| 279 | */ |
| 280 | static void serial_do_down(struct usb_serial_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 282 | struct usb_serial_driver *drv = port->serial->type; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 283 | struct usb_serial *serial; |
| 284 | struct module *owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 286 | /* The console is magical, do not hang up the console hardware |
| 287 | or there will be tears */ |
| 288 | if (port->console) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | return; |
| 290 | |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 291 | mutex_lock(&port->mutex); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 292 | serial = port->serial; |
| 293 | owner = serial->type->driver.owner; |
Luiz Fernando Capitulino | 8a4613f | 2005-11-28 19:16:07 -0200 | [diff] [blame] | 294 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 295 | if (drv->close) |
| 296 | drv->close(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 298 | mutex_unlock(&port->mutex); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | /** |
| 302 | * serial_do_free - free resources post close/hangup |
| 303 | * @port: port to free up |
| 304 | * |
| 305 | * Do the resource freeing and refcount dropping for the port. We must |
| 306 | * be careful about ordering and we must avoid freeing up the console. |
| 307 | */ |
| 308 | |
| 309 | static void serial_do_free(struct usb_serial_port *port) |
| 310 | { |
| 311 | struct usb_serial *serial; |
| 312 | struct module *owner; |
| 313 | |
| 314 | /* The console is magical, do not hang up the console hardware |
| 315 | or there will be tears */ |
| 316 | if (port->console) |
| 317 | return; |
| 318 | |
| 319 | serial = port->serial; |
| 320 | owner = serial->type->driver.owner; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 321 | put_device(&port->dev); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 322 | /* Mustn't dereference port any more */ |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 323 | mutex_lock(&serial->disc_mutex); |
| 324 | if (!serial->disconnected) |
| 325 | usb_autopm_put_interface(serial->interface); |
| 326 | mutex_unlock(&serial->disc_mutex); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 327 | usb_serial_put(serial); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 328 | /* Mustn't dereference serial any more */ |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 329 | module_put(owner); |
| 330 | } |
| 331 | |
| 332 | static void serial_close(struct tty_struct *tty, struct file *filp) |
| 333 | { |
| 334 | struct usb_serial_port *port = tty->driver_data; |
| 335 | |
Thadeu Lima de Souza Cascardo | f4fa446 | 2009-06-25 14:41:37 +0100 | [diff] [blame] | 336 | if (!port) |
| 337 | return; |
| 338 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 339 | dbg("%s - port %d", __func__, port->number); |
| 340 | |
| 341 | |
| 342 | if (tty_port_close_start(&port->port, tty, filp) == 0) |
| 343 | return; |
| 344 | |
| 345 | serial_do_down(port); |
| 346 | tty_port_close_end(&port->port, tty); |
| 347 | tty_port_tty_set(&port->port, NULL); |
| 348 | serial_do_free(port); |
| 349 | } |
| 350 | |
| 351 | static void serial_hangup(struct tty_struct *tty) |
| 352 | { |
| 353 | struct usb_serial_port *port = tty->driver_data; |
| 354 | serial_do_down(port); |
| 355 | tty_port_hangup(&port->port); |
| 356 | serial_do_free(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 359 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
| 360 | int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 362 | struct usb_serial_port *port = tty->driver_data; |
Oliver Neukum | 3ff4fd9 | 2007-01-13 07:32:27 +0100 | [diff] [blame] | 363 | int retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 365 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
Luiz Fernando Capitulino | 487f9c6 | 2005-11-28 19:16:05 -0200 | [diff] [blame] | 366 | goto exit; |
| 367 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 368 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 370 | /* count is managed under the mutex lock for the tty so cannot |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 371 | drop to zero until after the last close completes */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 372 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
| 374 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 375 | retval = port->serial->type->write(tty, port, buf, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | exit: |
| 378 | return retval; |
| 379 | } |
| 380 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 381 | static int serial_write_room(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 383 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 384 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 385 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 387 | return port->serial->type->write_room(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 390 | static int serial_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 392 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 393 | dbg("%s = port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 395 | WARN_ON(!port->port.count); |
Alan Cox | eff6937 | 2009-01-02 13:47:06 +0000 | [diff] [blame] | 396 | /* if the device was unplugged then any remaining characters |
| 397 | fell out of the connector ;) */ |
| 398 | if (port->serial->disconnected) |
| 399 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | /* pass on to the driver specific version of this function */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 401 | return port->serial->type->chars_in_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 404 | static void serial_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 406 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 407 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 409 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | /* pass on to the driver specific version of this function */ |
| 411 | if (port->serial->type->throttle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 412 | port->serial->type->throttle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
| 414 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 415 | static void serial_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 417 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 418 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 420 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | /* pass on to the driver specific version of this function */ |
| 422 | if (port->serial->type->unthrottle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 423 | port->serial->type->unthrottle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 426 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
| 427 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 429 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | int retval = -ENODEV; |
| 431 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 432 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 434 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 436 | /* pass on to the driver specific version of this function |
| 437 | if it is available */ |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 438 | if (port->serial->type->ioctl) { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 439 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 440 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | retval = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | return retval; |
| 443 | } |
| 444 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 445 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 447 | struct usb_serial_port *port = tty->driver_data; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 448 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 450 | WARN_ON(!port->port.count); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 451 | /* pass on to the driver specific version of this function |
| 452 | if it is available */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (port->serial->type->set_termios) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 454 | port->serial->type->set_termios(tty, port, old); |
Alan Cox | 3378509 | 2007-10-18 01:24:22 -0700 | [diff] [blame] | 455 | else |
| 456 | tty_termios_copy_hw(tty->termios, old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 459 | static int serial_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 461 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 463 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 465 | WARN_ON(!port->port.count); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 466 | /* pass on to the driver specific version of this function |
| 467 | if it is available */ |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 468 | if (port->serial->type->break_ctl) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 469 | port->serial->type->break_ctl(tty, break_state); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 470 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 473 | static int serial_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | { |
| 475 | struct usb_serial *serial; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | char tmp[40]; |
| 478 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 479 | dbg("%s", __func__); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 480 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
| 481 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | serial = usb_serial_get_by_index(i); |
| 483 | if (serial == NULL) |
| 484 | continue; |
| 485 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 486 | seq_printf(m, "%d:", i); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 487 | if (serial->type->driver.owner) |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 488 | seq_printf(m, " module:%s", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 489 | module_name(serial->type->driver.owner)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 490 | seq_printf(m, " name:\"%s\"", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 491 | serial->type->description); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 492 | seq_printf(m, " vendor:%04x product:%04x", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 493 | le16_to_cpu(serial->dev->descriptor.idVendor), |
| 494 | le16_to_cpu(serial->dev->descriptor.idProduct)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 495 | seq_printf(m, " num_ports:%d", serial->num_ports); |
| 496 | seq_printf(m, " port:%d", i - serial->minor + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 498 | seq_printf(m, " path:%s", tmp); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 499 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 500 | seq_putc(m, '\n'); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 501 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 503 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | } |
| 505 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 506 | static int serial_proc_open(struct inode *inode, struct file *file) |
| 507 | { |
| 508 | return single_open(file, serial_proc_show, NULL); |
| 509 | } |
| 510 | |
| 511 | static const struct file_operations serial_proc_fops = { |
| 512 | .owner = THIS_MODULE, |
| 513 | .open = serial_proc_open, |
| 514 | .read = seq_read, |
| 515 | .llseek = seq_lseek, |
| 516 | .release = single_release, |
| 517 | }; |
| 518 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 519 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 521 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 523 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 525 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | if (port->serial->type->tiocmget) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 527 | return port->serial->type->tiocmget(tty, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | return -EINVAL; |
| 529 | } |
| 530 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 531 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | unsigned int set, unsigned int clear) |
| 533 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 534 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 536 | dbg("%s - port %d", __func__, port->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 538 | WARN_ON(!port->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | if (port->serial->type->tiocmset) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 540 | return port->serial->type->tiocmset(tty, file, set, clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | return -EINVAL; |
| 542 | } |
| 543 | |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 544 | /* |
| 545 | * We would be calling tty_wakeup here, but unfortunately some line |
| 546 | * disciplines have an annoying habit of calling tty->write from |
| 547 | * the write wakeup callback (e.g. n_hdlc.c). |
| 548 | */ |
| 549 | void usb_serial_port_softint(struct usb_serial_port *port) |
| 550 | { |
| 551 | schedule_work(&port->work); |
| 552 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 553 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 554 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 555 | static void usb_serial_port_work(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 557 | struct usb_serial_port *port = |
| 558 | container_of(work, struct usb_serial_port, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | struct tty_struct *tty; |
| 560 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 561 | dbg("%s - port %d", __func__, port->number); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 562 | |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 563 | tty = tty_port_tty_get(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | if (!tty) |
| 565 | return; |
| 566 | |
| 567 | tty_wakeup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 568 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | static void port_release(struct device *dev) |
| 572 | { |
| 573 | struct usb_serial_port *port = to_usb_serial_port(dev); |
| 574 | |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 575 | dbg ("%s - %s", __func__, dev_name(dev)); |
Pete Zaitcev | 34f8e76 | 2006-06-21 15:00:45 -0700 | [diff] [blame] | 576 | port_free(port); |
| 577 | } |
| 578 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 579 | static void kill_traffic(struct usb_serial_port *port) |
Pete Zaitcev | 34f8e76 | 2006-06-21 15:00:45 -0700 | [diff] [blame] | 580 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | usb_kill_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | usb_kill_urb(port->write_urb); |
Oliver Neukum | 5adceac | 2007-08-17 14:01:38 +0200 | [diff] [blame] | 583 | /* |
| 584 | * This is tricky. |
| 585 | * Some drivers submit the read_urb in the |
| 586 | * handler for the write_urb or vice versa |
| 587 | * this order determines the order in which |
| 588 | * usb_kill_urb() must be used to reliably |
| 589 | * kill the URBs. As it is unknown here, |
| 590 | * both orders must be used in turn. |
| 591 | * The call below is not redundant. |
| 592 | */ |
| 593 | usb_kill_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | usb_kill_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | usb_kill_urb(port->interrupt_out_urb); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | static void port_free(struct usb_serial_port *port) |
| 599 | { |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 600 | /* |
| 601 | * Stop all the traffic before cancelling the work, so that |
| 602 | * nobody will restart it by calling usb_serial_port_softint. |
| 603 | */ |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 604 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 605 | cancel_work_sync(&port->work); |
| 606 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 607 | usb_free_urb(port->read_urb); |
| 608 | usb_free_urb(port->write_urb); |
| 609 | usb_free_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | usb_free_urb(port->interrupt_out_urb); |
| 611 | kfree(port->bulk_in_buffer); |
| 612 | kfree(port->bulk_out_buffer); |
| 613 | kfree(port->interrupt_in_buffer); |
| 614 | kfree(port->interrupt_out_buffer); |
| 615 | kfree(port); |
| 616 | } |
| 617 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 618 | static struct usb_serial *create_serial(struct usb_device *dev, |
| 619 | struct usb_interface *interface, |
| 620 | struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | { |
| 622 | struct usb_serial *serial; |
| 623 | |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 624 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | if (!serial) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 626 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | return NULL; |
| 628 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | serial->dev = usb_get_dev(dev); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 630 | serial->type = driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | serial->interface = interface; |
| 632 | kref_init(&serial->kref); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 633 | mutex_init(&serial->disc_mutex); |
Alan Stern | 0282b7f | 2008-07-29 12:01:04 -0400 | [diff] [blame] | 634 | serial->minor = SERIAL_TTY_NO_MINOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
| 636 | return serial; |
| 637 | } |
| 638 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 639 | 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] | 640 | struct usb_serial_driver *drv) |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 641 | { |
| 642 | struct usb_dynid *dynid; |
| 643 | |
| 644 | spin_lock(&drv->dynids.lock); |
| 645 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 646 | if (usb_match_one_id(intf, &dynid->id)) { |
| 647 | spin_unlock(&drv->dynids.lock); |
| 648 | return &dynid->id; |
| 649 | } |
| 650 | } |
| 651 | spin_unlock(&drv->dynids.lock); |
| 652 | return NULL; |
| 653 | } |
| 654 | |
| 655 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, |
| 656 | struct usb_interface *intf) |
| 657 | { |
| 658 | const struct usb_device_id *id; |
| 659 | |
| 660 | id = usb_match_id(intf, drv->id_table); |
| 661 | if (id) { |
| 662 | dbg("static descriptor matches"); |
| 663 | goto exit; |
| 664 | } |
| 665 | id = match_dynamic_id(intf, drv); |
| 666 | if (id) |
| 667 | dbg("dynamic descriptor matches"); |
| 668 | exit: |
| 669 | return id; |
| 670 | } |
| 671 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 672 | static struct usb_serial_driver *search_serial_device( |
| 673 | struct usb_interface *iface) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | const struct usb_device_id *id; |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 676 | struct usb_serial_driver *drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
Adrian Bunk | 93b1fae | 2006-01-10 00:13:33 +0100 | [diff] [blame] | 678 | /* Check if the usb id matches a known device */ |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 679 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
| 680 | id = get_iface_id(drv, iface); |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 681 | if (id) |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 682 | return drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | } |
| 684 | |
| 685 | return NULL; |
| 686 | } |
| 687 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 688 | static int serial_carrier_raised(struct tty_port *port) |
| 689 | { |
| 690 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 691 | struct usb_serial_driver *drv = p->serial->type; |
| 692 | if (drv->carrier_raised) |
| 693 | return drv->carrier_raised(p); |
| 694 | /* No carrier control - don't block */ |
| 695 | return 1; |
| 696 | } |
| 697 | |
| 698 | static void serial_dtr_rts(struct tty_port *port, int on) |
| 699 | { |
| 700 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 701 | struct usb_serial_driver *drv = p->serial->type; |
| 702 | if (drv->dtr_rts) |
| 703 | drv->dtr_rts(p, on); |
| 704 | } |
| 705 | |
| 706 | static const struct tty_port_operations serial_port_ops = { |
| 707 | .carrier_raised = serial_carrier_raised, |
| 708 | .dtr_rts = serial_dtr_rts, |
| 709 | }; |
| 710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | int usb_serial_probe(struct usb_interface *interface, |
| 712 | const struct usb_device_id *id) |
| 713 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 714 | struct usb_device *dev = interface_to_usbdev(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | struct usb_serial *serial = NULL; |
| 716 | struct usb_serial_port *port; |
| 717 | struct usb_host_interface *iface_desc; |
| 718 | struct usb_endpoint_descriptor *endpoint; |
| 719 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; |
| 720 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; |
| 721 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; |
| 722 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 723 | struct usb_serial_driver *type = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | int retval; |
Andre Haupt | dd9ca5d | 2008-06-18 15:56:00 +0200 | [diff] [blame] | 725 | unsigned int minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | int buffer_size; |
| 727 | int i; |
| 728 | int num_interrupt_in = 0; |
| 729 | int num_interrupt_out = 0; |
| 730 | int num_bulk_in = 0; |
| 731 | int num_bulk_out = 0; |
| 732 | int num_ports = 0; |
| 733 | int max_endpoints; |
| 734 | |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 735 | lock_kernel(); /* guard against unloading a serial driver module */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | type = search_serial_device(interface); |
| 737 | if (!type) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 738 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | dbg("none matched"); |
| 740 | return -ENODEV; |
| 741 | } |
| 742 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 743 | serial = create_serial(dev, interface, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | if (!serial) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 745 | unlock_kernel(); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 746 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | return -ENOMEM; |
| 748 | } |
| 749 | |
| 750 | /* if this device type has a probe function, call it */ |
| 751 | if (type->probe) { |
| 752 | const struct usb_device_id *id; |
| 753 | |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 754 | if (!try_module_get(type->driver.owner)) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 755 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 756 | dev_err(&interface->dev, |
| 757 | "module get failed, exiting\n"); |
| 758 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | return -EIO; |
| 760 | } |
| 761 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 762 | id = get_iface_id(type, interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | retval = type->probe(serial, id); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 764 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | if (retval) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 767 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 768 | dbg("sub driver rejected device"); |
| 769 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | return retval; |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | /* descriptor matches, let's find the endpoints needed */ |
| 775 | /* check out the endpoints */ |
| 776 | iface_desc = interface->cur_altsetting; |
| 777 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 778 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 779 | |
| 780 | if (usb_endpoint_is_bulk_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | /* we found a bulk in endpoint */ |
| 782 | dbg("found bulk in on endpoint %d", i); |
| 783 | bulk_in_endpoint[num_bulk_in] = endpoint; |
| 784 | ++num_bulk_in; |
| 785 | } |
| 786 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 787 | if (usb_endpoint_is_bulk_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | /* we found a bulk out endpoint */ |
| 789 | dbg("found bulk out on endpoint %d", i); |
| 790 | bulk_out_endpoint[num_bulk_out] = endpoint; |
| 791 | ++num_bulk_out; |
| 792 | } |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 793 | |
| 794 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | /* we found a interrupt in endpoint */ |
| 796 | dbg("found interrupt in on endpoint %d", i); |
| 797 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 798 | ++num_interrupt_in; |
| 799 | } |
| 800 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 801 | if (usb_endpoint_is_int_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | /* we found an interrupt out endpoint */ |
| 803 | dbg("found interrupt out on endpoint %d", i); |
| 804 | interrupt_out_endpoint[num_interrupt_out] = endpoint; |
| 805 | ++num_interrupt_out; |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 810 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | /* this is needed due to the looney way its endpoints are set up */ |
| 812 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && |
| 813 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || |
| 814 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && |
Johannes Steingraeber | 8fd8013 | 2006-09-16 16:17:34 +0200 | [diff] [blame] | 815 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
| 816 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && |
Andreas Bombe | ce816cf | 2008-09-14 01:58:55 +0200 | [diff] [blame] | 817 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
| 818 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && |
| 819 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | if (interface != dev->actconfig->interface[0]) { |
| 821 | /* check out the endpoints of the other interface*/ |
| 822 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; |
| 823 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 824 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 825 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | /* we found a interrupt in endpoint */ |
| 827 | dbg("found interrupt in for Prolific device on separate interface"); |
| 828 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 829 | ++num_interrupt_in; |
| 830 | } |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | /* Now make sure the PL-2303 is configured correctly. |
| 835 | * If not, give up now and hope this hack will work |
| 836 | * properly during a later invocation of usb_serial_probe |
| 837 | */ |
| 838 | if (num_bulk_in == 0 || num_bulk_out == 0) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 839 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 841 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | return -ENODEV; |
| 843 | } |
| 844 | } |
| 845 | /* END HORRIBLE HACK FOR PL2303 */ |
| 846 | #endif |
| 847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | #ifdef CONFIG_USB_SERIAL_GENERIC |
| 849 | if (type == &usb_serial_generic_device) { |
| 850 | num_ports = num_bulk_out; |
| 851 | if (num_ports == 0) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 852 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 853 | dev_err(&interface->dev, |
| 854 | "Generic device with no bulk out, not allowed.\n"); |
| 855 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | return -EIO; |
| 857 | } |
| 858 | } |
| 859 | #endif |
| 860 | if (!num_ports) { |
| 861 | /* if this device type has a calc_num_ports function, call it */ |
| 862 | if (type->calc_num_ports) { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 863 | if (!try_module_get(type->driver.owner)) { |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 864 | unlock_kernel(); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 865 | dev_err(&interface->dev, |
| 866 | "module get failed, exiting\n"); |
| 867 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | return -EIO; |
| 869 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 870 | num_ports = type->calc_num_ports(serial); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 871 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
| 873 | if (!num_ports) |
| 874 | num_ports = type->num_ports; |
| 875 | } |
| 876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | serial->num_ports = num_ports; |
| 878 | serial->num_bulk_in = num_bulk_in; |
| 879 | serial->num_bulk_out = num_bulk_out; |
| 880 | serial->num_interrupt_in = num_interrupt_in; |
| 881 | serial->num_interrupt_out = num_interrupt_out; |
| 882 | |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 883 | /* found all that we need */ |
| 884 | dev_info(&interface->dev, "%s converter detected\n", |
| 885 | type->description); |
| 886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | /* create our ports, we need as many as the max endpoints */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 888 | /* we don't use num_ports here because some devices have more |
| 889 | endpoint pairs than ports */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | max_endpoints = max(num_bulk_in, num_bulk_out); |
| 891 | max_endpoints = max(max_endpoints, num_interrupt_in); |
| 892 | max_endpoints = max(max_endpoints, num_interrupt_out); |
| 893 | max_endpoints = max(max_endpoints, (int)serial->num_ports); |
| 894 | serial->num_port_pointers = max_endpoints; |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 895 | unlock_kernel(); |
| 896 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 897 | dbg("%s - setting up %d port structures for this device", |
| 898 | __func__, max_endpoints); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | for (i = 0; i < max_endpoints; ++i) { |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 900 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | if (!port) |
| 902 | goto probe_error; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 903 | tty_port_init(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 904 | port->port.ops = &serial_port_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | port->serial = serial; |
Greg Kroah-Hartman | 507ca9b | 2005-04-23 12:49:16 -0700 | [diff] [blame] | 906 | spin_lock_init(&port->lock); |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 907 | mutex_init(&port->mutex); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 908 | INIT_WORK(&port->work, usb_serial_port_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | serial->port[i] = port; |
| 910 | } |
| 911 | |
| 912 | /* set up the endpoint information */ |
| 913 | for (i = 0; i < num_bulk_in; ++i) { |
| 914 | endpoint = bulk_in_endpoint[i]; |
| 915 | port = serial->port[i]; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 916 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | if (!port->read_urb) { |
| 918 | dev_err(&interface->dev, "No free urbs available\n"); |
| 919 | goto probe_error; |
| 920 | } |
| 921 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 922 | port->bulk_in_size = buffer_size; |
| 923 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 924 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | if (!port->bulk_in_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 926 | dev_err(&interface->dev, |
| 927 | "Couldn't allocate bulk_in_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | goto probe_error; |
| 929 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 930 | usb_fill_bulk_urb(port->read_urb, dev, |
| 931 | usb_rcvbulkpipe(dev, |
| 932 | endpoint->bEndpointAddress), |
| 933 | port->bulk_in_buffer, buffer_size, |
| 934 | serial->type->read_bulk_callback, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | for (i = 0; i < num_bulk_out; ++i) { |
| 938 | endpoint = bulk_out_endpoint[i]; |
| 939 | port = serial->port[i]; |
| 940 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 941 | if (!port->write_urb) { |
| 942 | dev_err(&interface->dev, "No free urbs available\n"); |
| 943 | goto probe_error; |
| 944 | } |
| 945 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 946 | port->bulk_out_size = buffer_size; |
| 947 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 948 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | if (!port->bulk_out_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 950 | dev_err(&interface->dev, |
| 951 | "Couldn't allocate bulk_out_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | goto probe_error; |
| 953 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 954 | usb_fill_bulk_urb(port->write_urb, dev, |
| 955 | usb_sndbulkpipe(dev, |
| 956 | endpoint->bEndpointAddress), |
| 957 | port->bulk_out_buffer, buffer_size, |
| 958 | serial->type->write_bulk_callback, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | if (serial->type->read_int_callback) { |
| 962 | for (i = 0; i < num_interrupt_in; ++i) { |
| 963 | endpoint = interrupt_in_endpoint[i]; |
| 964 | port = serial->port[i]; |
| 965 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 966 | if (!port->interrupt_in_urb) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 967 | dev_err(&interface->dev, |
| 968 | "No free urbs available\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | goto probe_error; |
| 970 | } |
| 971 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 972 | port->interrupt_in_endpointAddress = |
| 973 | endpoint->bEndpointAddress; |
| 974 | port->interrupt_in_buffer = kmalloc(buffer_size, |
| 975 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | if (!port->interrupt_in_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 977 | dev_err(&interface->dev, |
| 978 | "Couldn't allocate interrupt_in_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_int_urb(port->interrupt_in_urb, dev, |
| 982 | usb_rcvintpipe(dev, |
| 983 | endpoint->bEndpointAddress), |
| 984 | port->interrupt_in_buffer, buffer_size, |
| 985 | serial->type->read_int_callback, port, |
| 986 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } |
| 988 | } else if (num_interrupt_in) { |
| 989 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); |
| 990 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | if (serial->type->write_int_callback) { |
| 993 | for (i = 0; i < num_interrupt_out; ++i) { |
| 994 | endpoint = interrupt_out_endpoint[i]; |
| 995 | port = serial->port[i]; |
| 996 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 997 | if (!port->interrupt_out_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); |
| 1003 | port->interrupt_out_size = buffer_size; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1004 | port->interrupt_out_endpointAddress = |
| 1005 | endpoint->bEndpointAddress; |
| 1006 | port->interrupt_out_buffer = kmalloc(buffer_size, |
| 1007 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | if (!port->interrupt_out_buffer) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1009 | dev_err(&interface->dev, |
| 1010 | "Couldn't allocate interrupt_out_buffer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | goto probe_error; |
| 1012 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1013 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
| 1014 | usb_sndintpipe(dev, |
| 1015 | endpoint->bEndpointAddress), |
| 1016 | port->interrupt_out_buffer, buffer_size, |
| 1017 | serial->type->write_int_callback, port, |
| 1018 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | } |
| 1020 | } else if (num_interrupt_out) { |
| 1021 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); |
| 1022 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | /* if this device type has an attach function, call it */ |
| 1025 | if (type->attach) { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1026 | if (!try_module_get(type->driver.owner)) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1027 | dev_err(&interface->dev, |
| 1028 | "module get failed, exiting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | goto probe_error; |
| 1030 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1031 | retval = type->attach(serial); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1032 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | if (retval < 0) |
| 1034 | goto probe_error; |
| 1035 | if (retval > 0) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1036 | /* quietly accept this device, but don't bind to a |
| 1037 | serial port as it's about to disappear */ |
Alan Stern | 0a3c854 | 2009-05-27 11:25:52 -0400 | [diff] [blame] | 1038 | serial->num_ports = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | goto exit; |
| 1040 | } |
| 1041 | } |
| 1042 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1043 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1044 | dev_err(&interface->dev, "No more free serial devices\n"); |
| 1045 | goto probe_error; |
| 1046 | } |
Oliver Neukum | c744f99 | 2007-02-26 15:43:00 +0100 | [diff] [blame] | 1047 | serial->minor = minor; |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | /* register all of the individual ports with the driver core */ |
| 1050 | for (i = 0; i < num_ports; ++i) { |
| 1051 | port = serial->port[i]; |
| 1052 | port->dev.parent = &interface->dev; |
| 1053 | port->dev.driver = NULL; |
| 1054 | port->dev.bus = &usb_serial_bus_type; |
| 1055 | port->dev.release = &port_release; |
| 1056 | |
Kay Sievers | 0031a06 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1057 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1058 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1059 | port->dev_state = PORT_REGISTERING; |
Greg Kroah-Hartman | 13f4db9 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 1060 | retval = device_register(&port->dev); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1061 | if (retval) { |
Greg Kroah-Hartman | 13f4db9 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 1062 | dev_err(&port->dev, "Error registering port device, " |
| 1063 | "continuing\n"); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1064 | port->dev_state = PORT_UNREGISTERED; |
| 1065 | } else { |
| 1066 | port->dev_state = PORT_REGISTERED; |
| 1067 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | } |
| 1069 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1070 | usb_serial_console_init(debug, minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
| 1072 | exit: |
| 1073 | /* success */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1074 | usb_set_intfdata(interface, serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | return 0; |
| 1076 | |
| 1077 | probe_error: |
| 1078 | for (i = 0; i < num_bulk_in; ++i) { |
| 1079 | port = serial->port[i]; |
| 1080 | if (!port) |
| 1081 | continue; |
Mariusz Kozlowski | 95d4316 | 2006-11-08 15:36:51 +0100 | [diff] [blame] | 1082 | usb_free_urb(port->read_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | kfree(port->bulk_in_buffer); |
| 1084 | } |
| 1085 | for (i = 0; i < num_bulk_out; ++i) { |
| 1086 | port = serial->port[i]; |
| 1087 | if (!port) |
| 1088 | continue; |
Mariusz Kozlowski | 95d4316 | 2006-11-08 15:36:51 +0100 | [diff] [blame] | 1089 | usb_free_urb(port->write_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | kfree(port->bulk_out_buffer); |
| 1091 | } |
| 1092 | for (i = 0; i < num_interrupt_in; ++i) { |
| 1093 | port = serial->port[i]; |
| 1094 | if (!port) |
| 1095 | continue; |
Mariusz Kozlowski | 95d4316 | 2006-11-08 15:36:51 +0100 | [diff] [blame] | 1096 | usb_free_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | kfree(port->interrupt_in_buffer); |
| 1098 | } |
| 1099 | for (i = 0; i < num_interrupt_out; ++i) { |
| 1100 | port = serial->port[i]; |
| 1101 | if (!port) |
| 1102 | continue; |
Mariusz Kozlowski | 95d4316 | 2006-11-08 15:36:51 +0100 | [diff] [blame] | 1103 | usb_free_urb(port->interrupt_out_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | kfree(port->interrupt_out_buffer); |
| 1105 | } |
| 1106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | /* free up any memory that we allocated */ |
| 1108 | for (i = 0; i < serial->num_port_pointers; ++i) |
| 1109 | kfree(serial->port[i]); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1110 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | return -EIO; |
| 1112 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1113 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
| 1115 | void usb_serial_disconnect(struct usb_interface *interface) |
| 1116 | { |
| 1117 | int i; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1118 | struct usb_serial *serial = usb_get_intfdata(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | struct device *dev = &interface->dev; |
| 1120 | struct usb_serial_port *port; |
| 1121 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 1122 | usb_serial_console_disconnect(serial); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1123 | dbg("%s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1125 | mutex_lock(&serial->disc_mutex); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1126 | usb_set_intfdata(interface, NULL); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1127 | /* must set a flag, to signal subdrivers */ |
| 1128 | serial->disconnected = 1; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1129 | mutex_unlock(&serial->disc_mutex); |
| 1130 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1131 | for (i = 0; i < serial->num_ports; ++i) { |
| 1132 | port = serial->port[i]; |
| 1133 | if (port) { |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1134 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
| 1135 | if (tty) { |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1136 | /* The hangup will occur asynchronously but |
| 1137 | the object refcounts will sort out all the |
| 1138 | cleanup */ |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 1139 | tty_hangup(tty); |
| 1140 | tty_kref_put(tty); |
| 1141 | } |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1142 | kill_traffic(port); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1143 | cancel_work_sync(&port->work); |
Alan Stern | c706ebd | 2009-06-02 11:54:11 -0400 | [diff] [blame] | 1144 | if (port->dev_state == PORT_REGISTERED) { |
| 1145 | |
| 1146 | /* Make sure the port is bound so that the |
| 1147 | * driver's port_remove method is called. |
| 1148 | */ |
| 1149 | if (!port->dev.driver) { |
| 1150 | int rc; |
| 1151 | |
| 1152 | port->dev.driver = |
| 1153 | &serial->type->driver; |
| 1154 | rc = device_bind_driver(&port->dev); |
| 1155 | } |
| 1156 | port->dev_state = PORT_UNREGISTERING; |
| 1157 | device_del(&port->dev); |
| 1158 | port->dev_state = PORT_UNREGISTERED; |
| 1159 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | } |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1162 | serial->type->disconnect(serial); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1163 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1164 | /* let the last holder of this object |
| 1165 | * cause it to be cleaned up */ |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1166 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | dev_info(dev, "device disconnected\n"); |
| 1168 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1169 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1171 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
| 1172 | { |
| 1173 | struct usb_serial *serial = usb_get_intfdata(intf); |
| 1174 | struct usb_serial_port *port; |
| 1175 | int i, r = 0; |
| 1176 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1177 | serial->suspending = 1; |
| 1178 | |
Oliver Neukum | e31c188 | 2007-07-23 08:58:39 +0200 | [diff] [blame] | 1179 | for (i = 0; i < serial->num_ports; ++i) { |
| 1180 | port = serial->port[i]; |
| 1181 | if (port) |
| 1182 | kill_traffic(port); |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1183 | } |
| 1184 | |
| 1185 | if (serial->type->suspend) |
Oliver Neukum | e31c188 | 2007-07-23 08:58:39 +0200 | [diff] [blame] | 1186 | r = serial->type->suspend(serial, message); |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1187 | |
| 1188 | return r; |
| 1189 | } |
| 1190 | EXPORT_SYMBOL(usb_serial_suspend); |
| 1191 | |
| 1192 | int usb_serial_resume(struct usb_interface *intf) |
| 1193 | { |
| 1194 | struct usb_serial *serial = usb_get_intfdata(intf); |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1195 | int rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1196 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1197 | serial->suspending = 0; |
Sarah Sharp | 8abaee2 | 2007-10-25 10:58:43 -0700 | [diff] [blame] | 1198 | if (serial->type->resume) |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1199 | rv = serial->type->resume(serial); |
| 1200 | else |
| 1201 | rv = usb_serial_generic_resume(serial); |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1202 | |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1203 | return rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1204 | } |
| 1205 | EXPORT_SYMBOL(usb_serial_resume); |
| 1206 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1207 | static const struct tty_operations serial_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | .open = serial_open, |
| 1209 | .close = serial_close, |
| 1210 | .write = serial_write, |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1211 | .hangup = serial_hangup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | .write_room = serial_write_room, |
| 1213 | .ioctl = serial_ioctl, |
| 1214 | .set_termios = serial_set_termios, |
| 1215 | .throttle = serial_throttle, |
| 1216 | .unthrottle = serial_unthrottle, |
| 1217 | .break_ctl = serial_break, |
| 1218 | .chars_in_buffer = serial_chars_in_buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | .tiocmget = serial_tiocmget, |
| 1220 | .tiocmset = serial_tiocmset, |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 1221 | .proc_fops = &serial_proc_fops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | }; |
| 1223 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | struct tty_driver *usb_serial_tty_driver; |
| 1226 | |
| 1227 | static int __init usb_serial_init(void) |
| 1228 | { |
| 1229 | int i; |
| 1230 | int result; |
| 1231 | |
| 1232 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); |
| 1233 | if (!usb_serial_tty_driver) |
| 1234 | return -ENOMEM; |
| 1235 | |
| 1236 | /* Initialize our global data */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1237 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | serial_table[i] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | |
| 1240 | result = bus_register(&usb_serial_bus_type); |
| 1241 | if (result) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1242 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
| 1243 | "failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | goto exit_bus; |
| 1245 | } |
| 1246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | usb_serial_tty_driver->owner = THIS_MODULE; |
| 1248 | usb_serial_tty_driver->driver_name = "usbserial"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | usb_serial_tty_driver->name = "ttyUSB"; |
| 1250 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; |
| 1251 | usb_serial_tty_driver->minor_start = 0; |
| 1252 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 1253 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1254 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
| 1255 | TTY_DRIVER_DYNAMIC_DEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | usb_serial_tty_driver->init_termios = tty_std_termios; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1257 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
| 1258 | | HUPCL | CLOCAL; |
Alan Cox | a5b6f60 | 2008-04-08 17:16:06 +0100 | [diff] [blame] | 1259 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
| 1260 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
| 1262 | result = tty_register_driver(usb_serial_tty_driver); |
| 1263 | if (result) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1264 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
| 1265 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | goto exit_reg_driver; |
| 1267 | } |
| 1268 | |
| 1269 | /* register the USB driver */ |
| 1270 | result = usb_register(&usb_serial_driver); |
| 1271 | if (result < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1272 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
| 1273 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | goto exit_tty; |
| 1275 | } |
| 1276 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1277 | /* register the generic driver, if we should */ |
| 1278 | result = usb_serial_generic_register(debug); |
| 1279 | if (result < 0) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1280 | printk(KERN_ERR "usb-serial: %s - registering generic " |
| 1281 | "driver failed\n", __func__); |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1282 | goto exit_generic; |
| 1283 | } |
| 1284 | |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1285 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | |
| 1287 | return result; |
| 1288 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1289 | exit_generic: |
| 1290 | usb_deregister(&usb_serial_driver); |
| 1291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | exit_tty: |
| 1293 | tty_unregister_driver(usb_serial_tty_driver); |
| 1294 | |
| 1295 | exit_reg_driver: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | bus_unregister(&usb_serial_bus_type); |
| 1297 | |
| 1298 | exit_bus: |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1299 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
| 1300 | __func__, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | put_tty_driver(usb_serial_tty_driver); |
| 1302 | return result; |
| 1303 | } |
| 1304 | |
| 1305 | |
| 1306 | static void __exit usb_serial_exit(void) |
| 1307 | { |
| 1308 | usb_serial_console_exit(); |
| 1309 | |
| 1310 | usb_serial_generic_deregister(); |
| 1311 | |
| 1312 | usb_deregister(&usb_serial_driver); |
| 1313 | tty_unregister_driver(usb_serial_tty_driver); |
| 1314 | put_tty_driver(usb_serial_tty_driver); |
| 1315 | bus_unregister(&usb_serial_bus_type); |
| 1316 | } |
| 1317 | |
| 1318 | |
| 1319 | module_init(usb_serial_init); |
| 1320 | module_exit(usb_serial_exit); |
| 1321 | |
| 1322 | #define set_to_generic_if_null(type, function) \ |
| 1323 | do { \ |
| 1324 | if (!type->function) { \ |
| 1325 | type->function = usb_serial_generic_##function; \ |
| 1326 | dbg("Had to override the " #function \ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1327 | " usb serial operation with the generic one.");\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | } \ |
| 1329 | } while (0) |
| 1330 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1331 | static void fixup_generic(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | { |
| 1333 | set_to_generic_if_null(device, open); |
| 1334 | set_to_generic_if_null(device, write); |
| 1335 | set_to_generic_if_null(device, close); |
| 1336 | set_to_generic_if_null(device, write_room); |
| 1337 | set_to_generic_if_null(device, chars_in_buffer); |
| 1338 | set_to_generic_if_null(device, read_bulk_callback); |
| 1339 | set_to_generic_if_null(device, write_bulk_callback); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 1340 | set_to_generic_if_null(device, disconnect); |
| 1341 | set_to_generic_if_null(device, release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | } |
| 1343 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1344 | int usb_serial_register(struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1346 | /* must be called with BKL held */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | int retval; |
| 1348 | |
Dave Young | e4abe66 | 2009-02-14 21:21:13 +0800 | [diff] [blame] | 1349 | if (usb_disabled()) |
| 1350 | return -ENODEV; |
| 1351 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1352 | fixup_generic(driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1354 | if (!driver->description) |
| 1355 | driver->description = driver->driver.name; |
| 1356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | /* Add this device to our list of devices */ |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1358 | list_add(&driver->driver_list, &usb_serial_driver_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1360 | retval = usb_serial_bus_register(driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | if (retval) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1362 | printk(KERN_ERR "usb-serial: problem %d when registering " |
| 1363 | "driver %s\n", retval, driver->description); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1364 | list_del(&driver->driver_list); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1365 | } else |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1366 | printk(KERN_INFO "USB Serial support registered for %s\n", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1367 | driver->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
| 1369 | return retval; |
| 1370 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1371 | EXPORT_SYMBOL_GPL(usb_serial_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | |
| 1373 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1374 | void usb_serial_deregister(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1376 | /* must be called with BKL held */ |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 1377 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
| 1378 | device->description); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | list_del(&device->driver_list); |
| 1380 | usb_serial_bus_deregister(device); |
| 1381 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | |
| 1384 | /* Module information */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1385 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1386 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | MODULE_LICENSE("GPL"); |
| 1388 | |
| 1389 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 1390 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |