Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * USB Serial Converter driver |
| 3 | * |
Johan Hovold | 659597b | 2013-03-21 12:37:51 +0100 | [diff] [blame] | 4 | * Copyright (C) 2009 - 2013 Johan Hovold (jhovold@gmail.com) |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 5 | * Copyright (C) 1999 - 2012 Greg Kroah-Hartman (greg@kroah.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
| 7 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License version |
| 11 | * 2 as published by the Free Software Foundation. |
| 12 | * |
Greg Kroah-Hartman | 502b95c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 13 | * 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] | 14 | * based on a driver by Brad Keryan) |
| 15 | * |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 16 | * See Documentation/usb/usb-serial.txt for more information on using this |
| 17 | * driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | */ |
| 19 | |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/kernel.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/tty.h> |
| 27 | #include <linux/tty_driver.h> |
| 28 | #include <linux/tty_flip.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/moduleparam.h> |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 31 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/spinlock.h> |
Luiz Fernando Capitulino | 1ce7dd2 | 2006-03-24 17:12:31 -0300 | [diff] [blame] | 33 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/list.h> |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 35 | #include <linux/uaccess.h> |
Alan Cox | c56d300 | 2009-07-28 00:34:58 +0100 | [diff] [blame] | 36 | #include <linux/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame] | 38 | #include <linux/usb/serial.h> |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 39 | #include <linux/kfifo.h> |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 40 | #include <linux/idr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "pl2303.h" |
| 42 | |
Greg Kroah-Hartman | ee42f6c | 2012-09-18 17:10:29 +0100 | [diff] [blame] | 43 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@linuxfoundation.org>" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define DRIVER_DESC "USB Serial Driver core" |
| 45 | |
Greg Kroah-Hartman | 455b4f7 | 2013-06-06 10:31:35 -0700 | [diff] [blame] | 46 | #define USB_SERIAL_TTY_MAJOR 188 |
| 47 | #define USB_SERIAL_TTY_MINORS 512 /* should be enough for a while */ |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead |
| 50 | the MODULE_DEVICE_TABLE declarations in each serial driver |
| 51 | cause the "hotplug" program to pull in whatever module is necessary |
| 52 | via modprobe, and modprobe will load usbserial because the serial |
| 53 | drivers depend on it. |
| 54 | */ |
| 55 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 56 | static DEFINE_IDR(serial_minors); |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 57 | static DEFINE_MUTEX(table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | static LIST_HEAD(usb_serial_driver_list); |
| 59 | |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 60 | /* |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 61 | * Look up the serial port structure. If it is found and it hasn't been |
| 62 | * disconnected, return with the parent usb_serial structure's disc_mutex held |
| 63 | * and its refcount incremented. Otherwise return NULL. |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 64 | */ |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 65 | struct usb_serial_port *usb_serial_port_get_by_minor(unsigned minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 67 | struct usb_serial *serial; |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 68 | struct usb_serial_port *port; |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 69 | |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 70 | mutex_lock(&table_lock); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 71 | port = idr_find(&serial_minors, minor); |
| 72 | if (!port) |
| 73 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 75 | serial = port->serial; |
| 76 | mutex_lock(&serial->disc_mutex); |
| 77 | if (serial->disconnected) { |
| 78 | mutex_unlock(&serial->disc_mutex); |
| 79 | port = NULL; |
| 80 | } else { |
| 81 | kref_get(&serial->kref); |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 82 | } |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 83 | exit: |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 84 | mutex_unlock(&table_lock); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 85 | return port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } |
| 87 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 88 | static int allocate_minors(struct usb_serial *serial, int num_ports) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 90 | struct usb_serial_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | unsigned int i, j; |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 92 | int minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 94 | dev_dbg(&serial->interface->dev, "%s %d\n", __func__, num_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 96 | mutex_lock(&table_lock); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 97 | for (i = 0; i < num_ports; ++i) { |
| 98 | port = serial->port[i]; |
Johan Hovold | 194e958 | 2016-05-08 20:08:03 +0200 | [diff] [blame] | 99 | minor = idr_alloc(&serial_minors, port, 0, |
| 100 | USB_SERIAL_TTY_MINORS, GFP_KERNEL); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 101 | if (minor < 0) |
| 102 | goto error; |
| 103 | port->minor = minor; |
| 104 | port->port_number = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | } |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 106 | serial->minors_reserved = 1; |
Oliver Neukum | 3ddad82 | 2007-07-24 15:13:42 +0200 | [diff] [blame] | 107 | mutex_unlock(&table_lock); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 108 | return 0; |
| 109 | error: |
| 110 | /* unwind the already allocated minors */ |
| 111 | for (j = 0; j < i; ++j) |
| 112 | idr_remove(&serial_minors, serial->port[j]->minor); |
| 113 | mutex_unlock(&table_lock); |
| 114 | return minor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 117 | static void release_minors(struct usb_serial *serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
| 119 | int i; |
| 120 | |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 121 | mutex_lock(&table_lock); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 122 | for (i = 0; i < serial->num_ports; ++i) |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 123 | idr_remove(&serial_minors, serial->port[i]->minor); |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 124 | mutex_unlock(&table_lock); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 125 | serial->minors_reserved = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static void destroy_serial(struct kref *kref) |
| 129 | { |
| 130 | struct usb_serial *serial; |
| 131 | struct usb_serial_port *port; |
| 132 | int i; |
| 133 | |
| 134 | serial = to_usb_serial(kref); |
| 135 | |
Jim Radford | 521b85a | 2007-03-13 08:30:50 -0700 | [diff] [blame] | 136 | /* return the minor range that this device had */ |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 137 | if (serial->minors_reserved) |
| 138 | release_minors(serial); |
Jim Radford | 521b85a | 2007-03-13 08:30:50 -0700 | [diff] [blame] | 139 | |
Johan Hovold | 79b80b8 | 2013-03-21 12:36:43 +0100 | [diff] [blame] | 140 | if (serial->attached && serial->type->release) |
Alan Stern | a4720c6 | 2009-10-09 12:43:12 -0400 | [diff] [blame] | 141 | serial->type->release(serial); |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 142 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 143 | /* Now that nothing is using the ports, they can be freed */ |
| 144 | for (i = 0; i < serial->num_port_pointers; ++i) { |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 145 | port = serial->port[i]; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 146 | if (port) { |
| 147 | port->serial = NULL; |
Alan Stern | f9c99bb | 2009-06-02 11:53:55 -0400 | [diff] [blame] | 148 | put_device(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | |
Johan Hovold | d797105 | 2013-03-19 09:21:09 +0100 | [diff] [blame] | 152 | usb_put_intf(serial->interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | usb_put_dev(serial->dev); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 154 | kfree(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | } |
| 156 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 157 | void usb_serial_put(struct usb_serial *serial) |
| 158 | { |
| 159 | kref_put(&serial->kref, destroy_serial); |
| 160 | } |
| 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | /***************************************************************************** |
| 163 | * Driver tty interface functions |
| 164 | *****************************************************************************/ |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 165 | |
| 166 | /** |
| 167 | * serial_install - install tty |
| 168 | * @driver: the driver (USB in our case) |
| 169 | * @tty: the tty being created |
| 170 | * |
| 171 | * Create the termios objects for this tty. We use the default |
| 172 | * USB serial settings but permit them to be overridden by |
| 173 | * serial->type->init_termios. |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 174 | * |
| 175 | * This is the first place a new tty gets used. Hence this is where we |
| 176 | * acquire references to the usb_serial structure and the driver module, |
| 177 | * 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] | 178 | * All these actions are reversed in serial_cleanup(). |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 179 | */ |
| 180 | static int serial_install(struct tty_driver *driver, struct tty_struct *tty) |
| 181 | { |
| 182 | int idx = tty->index; |
| 183 | struct usb_serial *serial; |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 184 | struct usb_serial_port *port; |
| 185 | int retval = -ENODEV; |
| 186 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 187 | port = usb_serial_port_get_by_minor(idx); |
| 188 | if (!port) |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 189 | return retval; |
| 190 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 191 | serial = port->serial; |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 192 | if (!try_module_get(serial->type->driver.owner)) |
| 193 | goto error_module_get; |
| 194 | |
| 195 | retval = usb_autopm_get_interface(serial->interface); |
| 196 | if (retval) |
| 197 | goto error_get_interface; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 198 | |
Jiri Slaby | ca4ff10 | 2012-06-04 13:35:34 +0200 | [diff] [blame] | 199 | retval = tty_port_install(&port->port, driver, tty); |
Jiri Slaby | 76f82a7 | 2012-01-30 21:14:29 +0100 | [diff] [blame] | 200 | if (retval) |
| 201 | goto error_init_termios; |
| 202 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 203 | mutex_unlock(&serial->disc_mutex); |
| 204 | |
Alan Stern | 7e29bb4 | 2009-09-01 11:39:22 -0400 | [diff] [blame] | 205 | /* allow the driver to update the settings */ |
| 206 | if (serial->type->init_termios) |
| 207 | serial->type->init_termios(tty); |
| 208 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 209 | tty->driver_data = port; |
| 210 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 211 | return retval; |
| 212 | |
Alan Stern | 7e29bb4 | 2009-09-01 11:39:22 -0400 | [diff] [blame] | 213 | error_init_termios: |
Jiri Slaby | 76f82a7 | 2012-01-30 21:14:29 +0100 | [diff] [blame] | 214 | usb_autopm_put_interface(serial->interface); |
| 215 | error_get_interface: |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 216 | module_put(serial->type->driver.owner); |
| 217 | error_module_get: |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 218 | usb_serial_put(serial); |
| 219 | mutex_unlock(&serial->disc_mutex); |
| 220 | return retval; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 221 | } |
| 222 | |
Johan Hovold | 395e08d | 2013-03-21 12:36:23 +0100 | [diff] [blame] | 223 | static int serial_port_activate(struct tty_port *tport, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 225 | struct usb_serial_port *port = |
| 226 | container_of(tport, struct usb_serial_port, port); |
Alan Stern | 320348c | 2009-09-01 11:39:59 -0400 | [diff] [blame] | 227 | struct usb_serial *serial = port->serial; |
| 228 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 230 | mutex_lock(&serial->disc_mutex); |
| 231 | if (serial->disconnected) |
| 232 | retval = -ENODEV; |
| 233 | else |
| 234 | retval = port->serial->type->open(tty, port); |
| 235 | mutex_unlock(&serial->disc_mutex); |
Johan Hovold | 3827d87 | 2011-11-10 17:38:13 +0100 | [diff] [blame] | 236 | |
| 237 | if (retval < 0) |
| 238 | retval = usb_translate_errors(retval); |
| 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | return retval; |
| 241 | } |
| 242 | |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 243 | static int serial_open(struct tty_struct *tty, struct file *filp) |
| 244 | { |
| 245 | struct usb_serial_port *port = tty->driver_data; |
| 246 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 247 | dev_dbg(tty->dev, "%s\n", __func__); |
| 248 | |
Alan Cox | 64bc397 | 2009-10-06 16:06:11 +0100 | [diff] [blame] | 249 | return tty_port_open(&port->port, tty, filp); |
| 250 | } |
| 251 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 252 | /** |
Johan Hovold | 395e08d | 2013-03-21 12:36:23 +0100 | [diff] [blame] | 253 | * serial_port_shutdown - shut down hardware |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 254 | * @tport: tty port to shut down |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 255 | * |
Peter Hurley | 8a7298d | 2013-02-23 10:11:35 -0500 | [diff] [blame] | 256 | * Shut down a USB serial port. Serialized against activate by the |
| 257 | * tport mutex and kept to matching open/close pairs |
Peter Hurley | d41861c | 2016-04-09 17:53:25 -0700 | [diff] [blame] | 258 | * of calls by the initialized flag. |
Peter Hurley | 8a7298d | 2013-02-23 10:11:35 -0500 | [diff] [blame] | 259 | * |
| 260 | * Not called if tty is console. |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 261 | */ |
Johan Hovold | 395e08d | 2013-03-21 12:36:23 +0100 | [diff] [blame] | 262 | static void serial_port_shutdown(struct tty_port *tport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 264 | struct usb_serial_port *port = |
| 265 | container_of(tport, struct usb_serial_port, port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 266 | struct usb_serial_driver *drv = port->serial->type; |
Peter Hurley | 8a7298d | 2013-02-23 10:11:35 -0500 | [diff] [blame] | 267 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 268 | if (drv->close) |
| 269 | drv->close(port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 270 | } |
| 271 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 272 | static void serial_hangup(struct tty_struct *tty) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 273 | { |
Alan Cox | 4455e34 | 2009-09-19 13:13:24 -0700 | [diff] [blame] | 274 | struct usb_serial_port *port = tty->driver_data; |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 275 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 276 | dev_dbg(tty->dev, "%s\n", __func__); |
| 277 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 278 | tty_port_hangup(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | static void serial_close(struct tty_struct *tty, struct file *filp) |
| 282 | { |
| 283 | struct usb_serial_port *port = tty->driver_data; |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 284 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 285 | dev_dbg(tty->dev, "%s\n", __func__); |
| 286 | |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 287 | tty_port_close(&port->port, tty, filp); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 288 | } |
| 289 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 290 | /** |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame] | 291 | * serial_cleanup - free resources post close/hangup |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 292 | * @port: port to free up |
| 293 | * |
| 294 | * Do the resource freeing and refcount dropping for the port. |
| 295 | * Avoid freeing the console. |
| 296 | * |
Alan Cox | 36b3c07 | 2012-07-17 17:06:57 +0100 | [diff] [blame] | 297 | * Called asynchronously after the last tty kref is dropped. |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 298 | */ |
Dave Young | f278a2f | 2009-09-27 16:00:42 +0000 | [diff] [blame] | 299 | static void serial_cleanup(struct tty_struct *tty) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 300 | { |
| 301 | struct usb_serial_port *port = tty->driver_data; |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 302 | struct usb_serial *serial; |
| 303 | struct module *owner; |
| 304 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 305 | dev_dbg(tty->dev, "%s\n", __func__); |
| 306 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 307 | /* The console is magical. Do not hang up the console hardware |
| 308 | * or there will be tears. |
| 309 | */ |
Jason Wessel | bd5afa9 | 2010-03-08 21:50:12 -0600 | [diff] [blame] | 310 | if (port->port.console) |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 311 | return; |
| 312 | |
Alan Stern | cc56cd0 | 2009-09-01 11:39:13 -0400 | [diff] [blame] | 313 | tty->driver_data = NULL; |
| 314 | |
Alan Stern | f5b0953 | 2009-09-01 11:38:44 -0400 | [diff] [blame] | 315 | serial = port->serial; |
| 316 | owner = serial->type->driver.owner; |
| 317 | |
| 318 | mutex_lock(&serial->disc_mutex); |
| 319 | if (!serial->disconnected) |
| 320 | usb_autopm_put_interface(serial->interface); |
| 321 | mutex_unlock(&serial->disc_mutex); |
| 322 | |
| 323 | usb_serial_put(serial); |
| 324 | module_put(owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 327 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
| 328 | int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 330 | struct usb_serial_port *port = tty->driver_data; |
Oliver Neukum | 3ff4fd9 | 2007-01-13 07:32:27 +0100 | [diff] [blame] | 331 | int retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 333 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
Luiz Fernando Capitulino | 487f9c6 | 2005-11-28 19:16:05 -0200 | [diff] [blame] | 334 | goto exit; |
| 335 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 336 | dev_dbg(tty->dev, "%s - %d byte(s)\n", __func__, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 338 | retval = port->serial->type->write(tty, port, buf, count); |
Johan Hovold | c6249ff | 2011-11-10 17:40:44 +0100 | [diff] [blame] | 339 | if (retval < 0) |
| 340 | retval = usb_translate_errors(retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | exit: |
| 342 | return retval; |
| 343 | } |
| 344 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 345 | static int serial_write_room(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 347 | struct usb_serial_port *port = tty->driver_data; |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 348 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 349 | dev_dbg(tty->dev, "%s\n", __func__); |
Johan Hovold | 9993b42 | 2013-03-21 12:36:24 +0100 | [diff] [blame] | 350 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 351 | return port->serial->type->write_room(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | } |
| 353 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 354 | static int serial_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 356 | struct usb_serial_port *port = tty->driver_data; |
Johan Hovold | 810360a | 2013-01-14 16:52:56 +0100 | [diff] [blame] | 357 | struct usb_serial *serial = port->serial; |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 358 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 359 | dev_dbg(tty->dev, "%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Johan Hovold | 810360a | 2013-01-14 16:52:56 +0100 | [diff] [blame] | 361 | if (serial->disconnected) |
Johan Hovold | 4746b6c | 2013-05-05 20:32:33 +0200 | [diff] [blame] | 362 | return 0; |
Johan Hovold | 810360a | 2013-01-14 16:52:56 +0100 | [diff] [blame] | 363 | |
Johan Hovold | 4746b6c | 2013-05-05 20:32:33 +0200 | [diff] [blame] | 364 | return serial->type->chars_in_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Johan Hovold | 0693196 | 2013-05-05 20:32:27 +0200 | [diff] [blame] | 367 | static void serial_wait_until_sent(struct tty_struct *tty, int timeout) |
| 368 | { |
| 369 | struct usb_serial_port *port = tty->driver_data; |
| 370 | struct usb_serial *serial = port->serial; |
| 371 | |
| 372 | dev_dbg(tty->dev, "%s\n", __func__); |
| 373 | |
| 374 | if (!port->serial->type->wait_until_sent) |
| 375 | return; |
| 376 | |
| 377 | mutex_lock(&serial->disc_mutex); |
| 378 | if (!serial->disconnected) |
| 379 | port->serial->type->wait_until_sent(tty, timeout); |
| 380 | mutex_unlock(&serial->disc_mutex); |
| 381 | } |
| 382 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 383 | static void serial_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 385 | struct usb_serial_port *port = tty->driver_data; |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 386 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 387 | dev_dbg(tty->dev, "%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | if (port->serial->type->throttle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 390 | port->serial->type->throttle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | } |
| 392 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 393 | static void serial_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 395 | struct usb_serial_port *port = tty->driver_data; |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 396 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 397 | dev_dbg(tty->dev, "%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | if (port->serial->type->unthrottle) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 400 | port->serial->type->unthrottle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Alan Cox | 6caa76b | 2011-02-14 16:27:22 +0000 | [diff] [blame] | 403 | static int serial_ioctl(struct tty_struct *tty, |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 404 | unsigned int cmd, unsigned long arg) |
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; |
Johan Hovold | f448803 | 2013-06-05 12:21:11 +0200 | [diff] [blame] | 407 | int retval = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Johan Hovold | 4d5147e | 2013-12-29 19:22:55 +0100 | [diff] [blame] | 409 | dev_dbg(tty->dev, "%s - cmd 0x%04x\n", __func__, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Johan Hovold | 143d9d9 | 2013-03-21 12:36:51 +0100 | [diff] [blame] | 411 | switch (cmd) { |
| 412 | case TIOCMIWAIT: |
| 413 | if (port->serial->type->tiocmiwait) |
| 414 | retval = port->serial->type->tiocmiwait(tty, arg); |
| 415 | break; |
| 416 | default: |
| 417 | if (port->serial->type->ioctl) |
| 418 | retval = port->serial->type->ioctl(tty, cmd, arg); |
Johan Hovold | 143d9d9 | 2013-03-21 12:36:51 +0100 | [diff] [blame] | 419 | } |
Johan Hovold | 9993b42 | 2013-03-21 12:36:24 +0100 | [diff] [blame] | 420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | return retval; |
| 422 | } |
| 423 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 424 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 426 | struct usb_serial_port *port = tty->driver_data; |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 427 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 428 | dev_dbg(tty->dev, "%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | if (port->serial->type->set_termios) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 431 | port->serial->type->set_termios(tty, port, old); |
Alan Cox | 3378509 | 2007-10-18 01:24:22 -0700 | [diff] [blame] | 432 | else |
Alan Cox | adc8d74 | 2012-07-14 15:31:47 +0100 | [diff] [blame] | 433 | tty_termios_copy_hw(&tty->termios, old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } |
| 435 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 436 | static int serial_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 438 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 440 | dev_dbg(tty->dev, "%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 442 | if (port->serial->type->break_ctl) |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 443 | port->serial->type->break_ctl(tty, break_state); |
Johan Hovold | 9993b42 | 2013-03-21 12:36:24 +0100 | [diff] [blame] | 444 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 445 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | } |
| 447 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 448 | static int serial_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
| 450 | struct usb_serial *serial; |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 451 | struct usb_serial_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | char tmp[40]; |
| 454 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 455 | seq_puts(m, "usbserinfo:1.0 driver:2.0\n"); |
Greg Kroah-Hartman | 455b4f7 | 2013-06-06 10:31:35 -0700 | [diff] [blame] | 456 | for (i = 0; i < USB_SERIAL_TTY_MINORS; ++i) { |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 457 | port = usb_serial_port_get_by_minor(i); |
| 458 | if (port == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | continue; |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 460 | serial = port->serial; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 462 | seq_printf(m, "%d:", i); |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 463 | if (serial->type->driver.owner) |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 464 | seq_printf(m, " module:%s", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 465 | module_name(serial->type->driver.owner)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 466 | seq_printf(m, " name:\"%s\"", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 467 | serial->type->description); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 468 | seq_printf(m, " vendor:%04x product:%04x", |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 469 | le16_to_cpu(serial->dev->descriptor.idVendor), |
| 470 | le16_to_cpu(serial->dev->descriptor.idProduct)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 471 | seq_printf(m, " num_ports:%d", serial->num_ports); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 472 | seq_printf(m, " port:%d", port->port_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 474 | seq_printf(m, " path:%s", tmp); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 475 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 476 | seq_putc(m, '\n'); |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 477 | usb_serial_put(serial); |
Alan Stern | 8bc2c1b | 2009-09-01 11:38:59 -0400 | [diff] [blame] | 478 | mutex_unlock(&serial->disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | } |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 480 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
| 482 | |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 483 | static int serial_proc_open(struct inode *inode, struct file *file) |
| 484 | { |
| 485 | return single_open(file, serial_proc_show, NULL); |
| 486 | } |
| 487 | |
| 488 | static const struct file_operations serial_proc_fops = { |
| 489 | .owner = THIS_MODULE, |
| 490 | .open = serial_proc_open, |
| 491 | .read = seq_read, |
| 492 | .llseek = seq_lseek, |
| 493 | .release = single_release, |
| 494 | }; |
| 495 | |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 496 | static int serial_tiocmget(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 498 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 500 | dev_dbg(tty->dev, "%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | if (port->serial->type->tiocmget) |
Alan Cox | 60b33c1 | 2011-02-14 16:26:14 +0000 | [diff] [blame] | 503 | return port->serial->type->tiocmget(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | return -EINVAL; |
| 505 | } |
| 506 | |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 507 | static int serial_tiocmset(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | unsigned int set, unsigned int clear) |
| 509 | { |
Tobias Klauser | 81671dd | 2005-07-04 19:32:51 +0200 | [diff] [blame] | 510 | struct usb_serial_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 512 | dev_dbg(tty->dev, "%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | if (port->serial->type->tiocmset) |
Alan Cox | 20b9d17 | 2011-02-14 16:26:50 +0000 | [diff] [blame] | 515 | return port->serial->type->tiocmset(tty, set, clear); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | return -EINVAL; |
| 517 | } |
| 518 | |
Alan Cox | d281da7 | 2010-09-16 18:21:24 +0100 | [diff] [blame] | 519 | static int serial_get_icount(struct tty_struct *tty, |
| 520 | struct serial_icounter_struct *icount) |
| 521 | { |
| 522 | struct usb_serial_port *port = tty->driver_data; |
| 523 | |
Johan Hovold | d12e211 | 2013-03-21 12:36:25 +0100 | [diff] [blame] | 524 | dev_dbg(tty->dev, "%s\n", __func__); |
Alan Cox | d281da7 | 2010-09-16 18:21:24 +0100 | [diff] [blame] | 525 | |
| 526 | if (port->serial->type->get_icount) |
| 527 | return port->serial->type->get_icount(tty, icount); |
| 528 | return -EINVAL; |
| 529 | } |
| 530 | |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 531 | /* |
| 532 | * We would be calling tty_wakeup here, but unfortunately some line |
| 533 | * disciplines have an annoying habit of calling tty->write from |
| 534 | * the write wakeup callback (e.g. n_hdlc.c). |
| 535 | */ |
| 536 | void usb_serial_port_softint(struct usb_serial_port *port) |
| 537 | { |
| 538 | schedule_work(&port->work); |
| 539 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 540 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 541 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 542 | static void usb_serial_port_work(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 544 | struct usb_serial_port *port = |
| 545 | container_of(work, struct usb_serial_port, work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Jiri Slaby | 6aad04f | 2013-03-07 13:12:29 +0100 | [diff] [blame] | 547 | tty_port_tty_wakeup(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | } |
| 549 | |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 550 | static void usb_serial_port_poison_urbs(struct usb_serial_port *port) |
Pete Zaitcev | 34f8e76 | 2006-06-21 15:00:45 -0700 | [diff] [blame] | 551 | { |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 552 | int i; |
| 553 | |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 554 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 555 | usb_poison_urb(port->read_urbs[i]); |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 556 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 557 | usb_poison_urb(port->write_urbs[i]); |
| 558 | |
| 559 | usb_poison_urb(port->interrupt_in_urb); |
| 560 | usb_poison_urb(port->interrupt_out_urb); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 561 | } |
| 562 | |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 563 | static void usb_serial_port_unpoison_urbs(struct usb_serial_port *port) |
| 564 | { |
| 565 | int i; |
| 566 | |
| 567 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
| 568 | usb_unpoison_urb(port->read_urbs[i]); |
| 569 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
| 570 | usb_unpoison_urb(port->write_urbs[i]); |
| 571 | |
| 572 | usb_unpoison_urb(port->interrupt_in_urb); |
| 573 | usb_unpoison_urb(port->interrupt_out_urb); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 574 | } |
| 575 | |
Johan Hovold | 69a3d21 | 2013-03-21 12:36:47 +0100 | [diff] [blame] | 576 | static void usb_serial_port_release(struct device *dev) |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 577 | { |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 578 | struct usb_serial_port *port = to_usb_serial_port(dev); |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 579 | int i; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 580 | |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 581 | dev_dbg(dev, "%s\n", __func__); |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 582 | |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 583 | usb_free_urb(port->interrupt_in_urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | usb_free_urb(port->interrupt_out_urb); |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 585 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
| 586 | usb_free_urb(port->read_urbs[i]); |
| 587 | kfree(port->bulk_in_buffers[i]); |
| 588 | } |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 589 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { |
| 590 | usb_free_urb(port->write_urbs[i]); |
| 591 | kfree(port->bulk_out_buffers[i]); |
| 592 | } |
Stefani Seibold | 119eecc | 2009-12-23 09:10:48 +0100 | [diff] [blame] | 593 | kfifo_free(&port->write_fifo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | kfree(port->interrupt_in_buffer); |
| 595 | kfree(port->interrupt_out_buffer); |
Jiri Slaby | 191c5f1 | 2012-11-15 09:49:56 +0100 | [diff] [blame] | 596 | tty_port_destroy(&port->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | kfree(port); |
| 598 | } |
| 599 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 600 | static struct usb_serial *create_serial(struct usb_device *dev, |
| 601 | struct usb_interface *interface, |
| 602 | struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | { |
| 604 | struct usb_serial *serial; |
| 605 | |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 606 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 607 | if (!serial) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | serial->dev = usb_get_dev(dev); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 610 | serial->type = driver; |
Johan Hovold | d797105 | 2013-03-19 09:21:09 +0100 | [diff] [blame] | 611 | serial->interface = usb_get_intf(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | kref_init(&serial->kref); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 613 | mutex_init(&serial->disc_mutex); |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 614 | serial->minors_reserved = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
| 616 | return serial; |
| 617 | } |
| 618 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 619 | 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] | 620 | struct usb_serial_driver *drv) |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 621 | { |
| 622 | struct usb_dynid *dynid; |
| 623 | |
| 624 | spin_lock(&drv->dynids.lock); |
| 625 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 626 | if (usb_match_one_id(intf, &dynid->id)) { |
| 627 | spin_unlock(&drv->dynids.lock); |
| 628 | return &dynid->id; |
| 629 | } |
| 630 | } |
| 631 | spin_unlock(&drv->dynids.lock); |
| 632 | return NULL; |
| 633 | } |
| 634 | |
| 635 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, |
| 636 | struct usb_interface *intf) |
| 637 | { |
| 638 | const struct usb_device_id *id; |
| 639 | |
| 640 | id = usb_match_id(intf, drv->id_table); |
| 641 | if (id) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 642 | dev_dbg(&intf->dev, "static descriptor matches\n"); |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 643 | goto exit; |
| 644 | } |
| 645 | id = match_dynamic_id(intf, drv); |
| 646 | if (id) |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 647 | dev_dbg(&intf->dev, "dynamic descriptor matches\n"); |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 648 | exit: |
| 649 | return id; |
| 650 | } |
| 651 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 652 | /* Caller must hold table_lock */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 653 | static struct usb_serial_driver *search_serial_device( |
| 654 | struct usb_interface *iface) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | { |
Bjørn Mork | 954c3f8 | 2012-05-30 10:00:14 +0200 | [diff] [blame] | 656 | const struct usb_device_id *id = NULL; |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 657 | struct usb_serial_driver *drv; |
Bjørn Mork | 954c3f8 | 2012-05-30 10:00:14 +0200 | [diff] [blame] | 658 | struct usb_driver *driver = to_usb_driver(iface->dev.driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Adrian Bunk | 93b1fae | 2006-01-10 00:13:33 +0100 | [diff] [blame] | 660 | /* Check if the usb id matches a known device */ |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 661 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
Bjørn Mork | 954c3f8 | 2012-05-30 10:00:14 +0200 | [diff] [blame] | 662 | if (drv->usb_driver == driver) |
| 663 | id = get_iface_id(drv, iface); |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 664 | if (id) |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 665 | return drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | } |
| 667 | |
| 668 | return NULL; |
| 669 | } |
| 670 | |
Johan Hovold | 395e08d | 2013-03-21 12:36:23 +0100 | [diff] [blame] | 671 | static int serial_port_carrier_raised(struct tty_port *port) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 672 | { |
| 673 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
| 674 | struct usb_serial_driver *drv = p->serial->type; |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 675 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 676 | if (drv->carrier_raised) |
| 677 | return drv->carrier_raised(p); |
| 678 | /* No carrier control - don't block */ |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 679 | return 1; |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 680 | } |
| 681 | |
Johan Hovold | 395e08d | 2013-03-21 12:36:23 +0100 | [diff] [blame] | 682 | static void serial_port_dtr_rts(struct tty_port *port, int on) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 683 | { |
| 684 | struct usb_serial_port *p = container_of(port, struct usb_serial_port, port); |
Johan Hovold | f5f4530 | 2013-06-26 16:47:22 +0200 | [diff] [blame] | 685 | struct usb_serial_driver *drv = p->serial->type; |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 686 | |
Johan Hovold | f5f4530 | 2013-06-26 16:47:22 +0200 | [diff] [blame] | 687 | if (drv->dtr_rts) |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 688 | drv->dtr_rts(p, on); |
| 689 | } |
| 690 | |
Johan Hovold | 2deb96b | 2015-02-18 10:34:52 +0700 | [diff] [blame] | 691 | static ssize_t port_number_show(struct device *dev, |
| 692 | struct device_attribute *attr, char *buf) |
| 693 | { |
| 694 | struct usb_serial_port *port = to_usb_serial_port(dev); |
| 695 | |
| 696 | return sprintf(buf, "%u\n", port->port_number); |
| 697 | } |
| 698 | static DEVICE_ATTR_RO(port_number); |
| 699 | |
| 700 | static struct attribute *usb_serial_port_attrs[] = { |
| 701 | &dev_attr_port_number.attr, |
| 702 | NULL |
| 703 | }; |
| 704 | ATTRIBUTE_GROUPS(usb_serial_port); |
| 705 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 706 | static const struct tty_port_operations serial_port_ops = { |
Johan Hovold | 395e08d | 2013-03-21 12:36:23 +0100 | [diff] [blame] | 707 | .carrier_raised = serial_port_carrier_raised, |
| 708 | .dtr_rts = serial_port_dtr_rts, |
| 709 | .activate = serial_port_activate, |
| 710 | .shutdown = serial_port_shutdown, |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 711 | }; |
| 712 | |
Greg Kroah-Hartman | 2edd284 | 2012-05-07 14:46:48 -0700 | [diff] [blame] | 713 | static int usb_serial_probe(struct usb_interface *interface, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | const struct usb_device_id *id) |
| 715 | { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 716 | struct device *ddev = &interface->dev; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 717 | struct usb_device *dev = interface_to_usbdev(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | struct usb_serial *serial = NULL; |
| 719 | struct usb_serial_port *port; |
| 720 | struct usb_host_interface *iface_desc; |
| 721 | struct usb_endpoint_descriptor *endpoint; |
| 722 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; |
| 723 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; |
| 724 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; |
| 725 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 726 | struct usb_serial_driver *type = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | int buffer_size; |
| 729 | int i; |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 730 | int j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | int num_interrupt_in = 0; |
| 732 | int num_interrupt_out = 0; |
| 733 | int num_bulk_in = 0; |
| 734 | int num_bulk_out = 0; |
| 735 | int num_ports = 0; |
| 736 | int max_endpoints; |
| 737 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 738 | mutex_lock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | type = search_serial_device(interface); |
| 740 | if (!type) { |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 741 | mutex_unlock(&table_lock); |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 742 | dev_dbg(ddev, "none matched\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | return -ENODEV; |
| 744 | } |
| 745 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 746 | if (!try_module_get(type->driver.owner)) { |
| 747 | mutex_unlock(&table_lock); |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 748 | dev_err(ddev, "module get failed, exiting\n"); |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 749 | return -EIO; |
| 750 | } |
| 751 | mutex_unlock(&table_lock); |
| 752 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 753 | serial = create_serial(dev, interface, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | if (!serial) { |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 755 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | return -ENOMEM; |
| 757 | } |
| 758 | |
| 759 | /* if this device type has a probe function, call it */ |
| 760 | if (type->probe) { |
| 761 | const struct usb_device_id *id; |
| 762 | |
Greg Kroah-Hartman | 93bacef | 2006-12-17 21:50:23 +0100 | [diff] [blame] | 763 | id = get_iface_id(type, interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | retval = type->probe(serial, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | if (retval) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 767 | dev_dbg(ddev, "sub driver rejected device\n"); |
Jan Safrata | 0658a33 | 2012-05-22 14:04:50 +0200 | [diff] [blame] | 768 | usb_serial_put(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 769 | module_put(type->driver.owner); |
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 */ |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 782 | dev_dbg(ddev, "found bulk in on endpoint %d\n", i); |
Johan Hovold | d979e9f | 2014-08-27 11:55:18 +0200 | [diff] [blame] | 783 | if (num_bulk_in < MAX_NUM_PORTS) { |
| 784 | bulk_in_endpoint[num_bulk_in] = endpoint; |
| 785 | ++num_bulk_in; |
| 786 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
| 788 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 789 | if (usb_endpoint_is_bulk_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | /* we found a bulk out endpoint */ |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 791 | dev_dbg(ddev, "found bulk out on endpoint %d\n", i); |
Johan Hovold | d979e9f | 2014-08-27 11:55:18 +0200 | [diff] [blame] | 792 | if (num_bulk_out < MAX_NUM_PORTS) { |
| 793 | bulk_out_endpoint[num_bulk_out] = endpoint; |
| 794 | ++num_bulk_out; |
| 795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | } |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 797 | |
| 798 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | /* we found a interrupt in endpoint */ |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 800 | dev_dbg(ddev, "found interrupt in on endpoint %d\n", i); |
Johan Hovold | d979e9f | 2014-08-27 11:55:18 +0200 | [diff] [blame] | 801 | if (num_interrupt_in < MAX_NUM_PORTS) { |
| 802 | interrupt_in_endpoint[num_interrupt_in] = |
| 803 | endpoint; |
| 804 | ++num_interrupt_in; |
| 805 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | } |
| 807 | |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 808 | if (usb_endpoint_is_int_out(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | /* we found an interrupt out endpoint */ |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 810 | dev_dbg(ddev, "found interrupt out on endpoint %d\n", i); |
Johan Hovold | d979e9f | 2014-08-27 11:55:18 +0200 | [diff] [blame] | 811 | if (num_interrupt_out < MAX_NUM_PORTS) { |
| 812 | interrupt_out_endpoint[num_interrupt_out] = |
| 813 | endpoint; |
| 814 | ++num_interrupt_out; |
| 815 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | } |
| 817 | } |
| 818 | |
Javier Martinez Canillas | 8c34d82 | 2016-04-20 14:26:58 -0400 | [diff] [blame] | 819 | #if IS_ENABLED(CONFIG_USB_SERIAL_PL2303) |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 820 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | /* this is needed due to the looney way its endpoints are set up */ |
| 822 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && |
| 823 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || |
| 824 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && |
Johannes Steingraeber | 8fd8013 | 2006-09-16 16:17:34 +0200 | [diff] [blame] | 825 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
| 826 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && |
Andreas Bombe | ce816cf | 2008-09-14 01:58:55 +0200 | [diff] [blame] | 827 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
| 828 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && |
| 829 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | if (interface != dev->actconfig->interface[0]) { |
| 831 | /* check out the endpoints of the other interface*/ |
| 832 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; |
| 833 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 834 | endpoint = &iface_desc->endpoint[i].desc; |
Luiz Fernando N. Capitulino | 4fa1bbf | 2006-09-27 11:58:53 -0700 | [diff] [blame] | 835 | if (usb_endpoint_is_int_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | /* we found a interrupt in endpoint */ |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 837 | dev_dbg(ddev, "found interrupt in for Prolific device on separate interface\n"); |
Johan Hovold | d979e9f | 2014-08-27 11:55:18 +0200 | [diff] [blame] | 838 | if (num_interrupt_in < MAX_NUM_PORTS) { |
| 839 | interrupt_in_endpoint[num_interrupt_in] = endpoint; |
| 840 | ++num_interrupt_in; |
| 841 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | } |
| 843 | } |
| 844 | } |
| 845 | |
| 846 | /* Now make sure the PL-2303 is configured correctly. |
| 847 | * If not, give up now and hope this hack will work |
| 848 | * properly during a later invocation of usb_serial_probe |
| 849 | */ |
| 850 | if (num_bulk_in == 0 || num_bulk_out == 0) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 851 | dev_info(ddev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
Jan Safrata | 0658a33 | 2012-05-22 14:04:50 +0200 | [diff] [blame] | 852 | usb_serial_put(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 853 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | return -ENODEV; |
| 855 | } |
| 856 | } |
| 857 | /* END HORRIBLE HACK FOR PL2303 */ |
| 858 | #endif |
| 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | #ifdef CONFIG_USB_SERIAL_GENERIC |
| 861 | if (type == &usb_serial_generic_device) { |
| 862 | num_ports = num_bulk_out; |
| 863 | if (num_ports == 0) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 864 | dev_err(ddev, "Generic device with no bulk out, not allowed.\n"); |
Jan Safrata | 0658a33 | 2012-05-22 14:04:50 +0200 | [diff] [blame] | 865 | usb_serial_put(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 866 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | return -EIO; |
| 868 | } |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 869 | dev_info(ddev, "The \"generic\" usb-serial driver is only for testing and one-off prototypes.\n"); |
| 870 | dev_info(ddev, "Tell linux-usb@vger.kernel.org to add your device to a proper driver.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | #endif |
| 873 | if (!num_ports) { |
| 874 | /* if this device type has a calc_num_ports function, call it */ |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 875 | if (type->calc_num_ports) |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 876 | num_ports = type->calc_num_ports(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | if (!num_ports) |
| 878 | num_ports = type->num_ports; |
| 879 | } |
| 880 | |
Johan Hovold | 5654699 | 2014-08-27 11:55:19 +0200 | [diff] [blame] | 881 | if (num_ports > MAX_NUM_PORTS) { |
| 882 | dev_warn(ddev, "too many ports requested: %d\n", num_ports); |
| 883 | num_ports = MAX_NUM_PORTS; |
| 884 | } |
| 885 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | serial->num_ports = num_ports; |
| 887 | serial->num_bulk_in = num_bulk_in; |
| 888 | serial->num_bulk_out = num_bulk_out; |
| 889 | serial->num_interrupt_in = num_interrupt_in; |
| 890 | serial->num_interrupt_out = num_interrupt_out; |
| 891 | |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 892 | /* found all that we need */ |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 893 | dev_info(ddev, "%s converter detected\n", type->description); |
Alan Stern | 063a2da | 2007-10-10 16:24:06 -0400 | [diff] [blame] | 894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | /* create our ports, we need as many as the max endpoints */ |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 896 | /* we don't use num_ports here because some devices have more |
| 897 | endpoint pairs than ports */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | max_endpoints = max(num_bulk_in, num_bulk_out); |
| 899 | max_endpoints = max(max_endpoints, num_interrupt_in); |
| 900 | max_endpoints = max(max_endpoints, num_interrupt_out); |
| 901 | max_endpoints = max(max_endpoints, (int)serial->num_ports); |
| 902 | serial->num_port_pointers = max_endpoints; |
Oliver Neukum | 4b10f0f | 2007-01-13 07:31:27 +0100 | [diff] [blame] | 903 | |
Johan Hovold | d9a38a8 | 2014-03-12 19:09:42 +0100 | [diff] [blame] | 904 | dev_dbg(ddev, "setting up %d port structure(s)\n", max_endpoints); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | for (i = 0; i < max_endpoints; ++i) { |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 906 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | if (!port) |
| 908 | goto probe_error; |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 909 | tty_port_init(&port->port); |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 910 | port->port.ops = &serial_port_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | port->serial = serial; |
Greg Kroah-Hartman | 507ca9b | 2005-04-23 12:49:16 -0700 | [diff] [blame] | 912 | spin_lock_init(&port->lock); |
Alan Cox | e1108a6 | 2009-10-06 16:06:36 +0100 | [diff] [blame] | 913 | /* Keep this for private driver use for the moment but |
| 914 | should probably go away */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 915 | INIT_WORK(&port->work, usb_serial_port_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | serial->port[i] = port; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 917 | port->dev.parent = &interface->dev; |
| 918 | port->dev.driver = NULL; |
| 919 | port->dev.bus = &usb_serial_bus_type; |
Johan Hovold | 69a3d21 | 2013-03-21 12:36:47 +0100 | [diff] [blame] | 920 | port->dev.release = &usb_serial_port_release; |
Johan Hovold | 2deb96b | 2015-02-18 10:34:52 +0700 | [diff] [blame] | 921 | port->dev.groups = usb_serial_port_groups; |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 922 | device_initialize(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | /* set up the endpoint information */ |
| 926 | for (i = 0; i < num_bulk_in; ++i) { |
| 927 | endpoint = bulk_in_endpoint[i]; |
| 928 | port = serial->port[i]; |
Alan Stern | 969e303 | 2011-02-23 15:28:18 -0500 | [diff] [blame] | 929 | buffer_size = max_t(int, serial->type->bulk_in_size, |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 930 | usb_endpoint_maxp(endpoint)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | port->bulk_in_size = buffer_size; |
| 932 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 933 | |
| 934 | for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) { |
| 935 | set_bit(j, &port->read_urbs_free); |
| 936 | port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 937 | if (!port->read_urbs[j]) |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 938 | goto probe_error; |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 939 | port->bulk_in_buffers[j] = kmalloc(buffer_size, |
| 940 | GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 941 | if (!port->bulk_in_buffers[j]) |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 942 | goto probe_error; |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 943 | usb_fill_bulk_urb(port->read_urbs[j], dev, |
| 944 | usb_rcvbulkpipe(dev, |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 945 | endpoint->bEndpointAddress), |
Johan Hovold | d83b405 | 2011-11-06 19:06:37 +0100 | [diff] [blame] | 946 | port->bulk_in_buffers[j], buffer_size, |
| 947 | serial->type->read_bulk_callback, |
| 948 | port); |
| 949 | } |
| 950 | |
| 951 | port->read_urb = port->read_urbs[0]; |
| 952 | port->bulk_in_buffer = port->bulk_in_buffers[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | for (i = 0; i < num_bulk_out; ++i) { |
| 956 | endpoint = bulk_out_endpoint[i]; |
| 957 | port = serial->port[i]; |
Stefani Seibold | 119eecc | 2009-12-23 09:10:48 +0100 | [diff] [blame] | 958 | if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) |
David VomLehn | 8e8dce0 | 2009-08-28 12:54:27 -0700 | [diff] [blame] | 959 | goto probe_error; |
Johan Hovold | bc4b1f4 | 2015-02-15 11:57:53 +0700 | [diff] [blame] | 960 | buffer_size = serial->type->bulk_out_size; |
| 961 | if (!buffer_size) |
| 962 | buffer_size = usb_endpoint_maxp(endpoint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | port->bulk_out_size = buffer_size; |
| 964 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; |
Johan Hovold | 1ce7b93 | 2011-11-06 19:06:31 +0100 | [diff] [blame] | 965 | |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 966 | for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) { |
| 967 | set_bit(j, &port->write_urbs_free); |
| 968 | port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 969 | if (!port->write_urbs[j]) |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 970 | goto probe_error; |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 971 | port->bulk_out_buffers[j] = kmalloc(buffer_size, |
| 972 | GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 973 | if (!port->bulk_out_buffers[j]) |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 974 | goto probe_error; |
Johan Hovold | 27c7acf | 2010-05-05 23:57:37 +0200 | [diff] [blame] | 975 | usb_fill_bulk_urb(port->write_urbs[j], dev, |
| 976 | usb_sndbulkpipe(dev, |
| 977 | endpoint->bEndpointAddress), |
| 978 | port->bulk_out_buffers[j], buffer_size, |
| 979 | serial->type->write_bulk_callback, |
| 980 | port); |
| 981 | } |
Johan Hovold | 1ce7b93 | 2011-11-06 19:06:31 +0100 | [diff] [blame] | 982 | |
| 983 | port->write_urb = port->write_urbs[0]; |
| 984 | port->bulk_out_buffer = port->bulk_out_buffers[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | } |
| 986 | |
| 987 | if (serial->type->read_int_callback) { |
| 988 | for (i = 0; i < num_interrupt_in; ++i) { |
| 989 | endpoint = interrupt_in_endpoint[i]; |
| 990 | port = serial->port[i]; |
| 991 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 992 | if (!port->interrupt_in_urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | goto probe_error; |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 994 | buffer_size = usb_endpoint_maxp(endpoint); |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 995 | port->interrupt_in_endpointAddress = |
| 996 | endpoint->bEndpointAddress; |
| 997 | port->interrupt_in_buffer = kmalloc(buffer_size, |
| 998 | GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 999 | if (!port->interrupt_in_buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | goto probe_error; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1001 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
| 1002 | usb_rcvintpipe(dev, |
| 1003 | endpoint->bEndpointAddress), |
| 1004 | port->interrupt_in_buffer, buffer_size, |
| 1005 | serial->type->read_int_callback, port, |
| 1006 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | } |
| 1008 | } else if (num_interrupt_in) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1009 | dev_dbg(ddev, "The device claims to support interrupt in transfers, but read_int_callback is not defined\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1011 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | if (serial->type->write_int_callback) { |
| 1013 | for (i = 0; i < num_interrupt_out; ++i) { |
| 1014 | endpoint = interrupt_out_endpoint[i]; |
| 1015 | port = serial->port[i]; |
| 1016 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 1017 | if (!port->interrupt_out_urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | goto probe_error; |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 1019 | buffer_size = usb_endpoint_maxp(endpoint); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | port->interrupt_out_size = buffer_size; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1021 | port->interrupt_out_endpointAddress = |
| 1022 | endpoint->bEndpointAddress; |
| 1023 | port->interrupt_out_buffer = kmalloc(buffer_size, |
| 1024 | GFP_KERNEL); |
Johan Hovold | 6b03f7f | 2013-03-21 12:36:26 +0100 | [diff] [blame] | 1025 | if (!port->interrupt_out_buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | goto probe_error; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1027 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
| 1028 | usb_sndintpipe(dev, |
| 1029 | endpoint->bEndpointAddress), |
| 1030 | port->interrupt_out_buffer, buffer_size, |
| 1031 | serial->type->write_int_callback, port, |
| 1032 | endpoint->bInterval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | } |
| 1034 | } else if (num_interrupt_out) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1035 | dev_dbg(ddev, "The device claims to support interrupt out transfers, but write_int_callback is not defined\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | } |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1037 | |
Johan Hovold | bdce661 | 2012-04-25 15:56:32 +0200 | [diff] [blame] | 1038 | usb_set_intfdata(interface, serial); |
| 1039 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | /* if this device type has an attach function, call it */ |
| 1041 | if (type->attach) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1042 | retval = type->attach(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | if (retval < 0) |
| 1044 | goto probe_error; |
Alan Stern | a4720c6 | 2009-10-09 12:43:12 -0400 | [diff] [blame] | 1045 | serial->attached = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | if (retval > 0) { |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1047 | /* quietly accept this device, but don't bind to a |
| 1048 | serial port as it's about to disappear */ |
Alan Stern | 0a3c854 | 2009-05-27 11:25:52 -0400 | [diff] [blame] | 1049 | serial->num_ports = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | goto exit; |
| 1051 | } |
Alan Stern | a4720c6 | 2009-10-09 12:43:12 -0400 | [diff] [blame] | 1052 | } else { |
| 1053 | serial->attached = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | } |
| 1055 | |
Johan Hovold | a65a6f1 | 2012-03-20 16:59:33 +0100 | [diff] [blame] | 1056 | /* Avoid race with tty_open and serial_install by setting the |
| 1057 | * disconnected flag and not clearing it until all ports have been |
| 1058 | * registered. |
| 1059 | */ |
| 1060 | serial->disconnected = 1; |
| 1061 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 1062 | if (allocate_minors(serial, num_ports)) { |
| 1063 | dev_err(ddev, "No more free serial minor numbers\n"); |
Oliver Neukum | 34ef50e | 2007-01-13 07:29:26 +0100 | [diff] [blame] | 1064 | goto probe_error; |
| 1065 | } |
| 1066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | /* register all of the individual ports with the driver core */ |
| 1068 | for (i = 0; i < num_ports; ++i) { |
| 1069 | port = serial->port[i]; |
Greg Kroah-Hartman | 1143832 | 2013-06-06 10:32:00 -0700 | [diff] [blame] | 1070 | dev_set_name(&port->dev, "ttyUSB%d", port->minor); |
Johan Hovold | d9a38a8 | 2014-03-12 19:09:42 +0100 | [diff] [blame] | 1071 | dev_dbg(ddev, "registering %s\n", dev_name(&port->dev)); |
Ming Lei | a7a6b79 | 2010-07-13 23:56:24 +0800 | [diff] [blame] | 1072 | device_enable_async_suspend(&port->dev); |
| 1073 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1074 | retval = device_add(&port->dev); |
Alan Stern | 891a3b1 | 2012-03-28 16:10:49 -0400 | [diff] [blame] | 1075 | if (retval) |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1076 | dev_err(ddev, "Error registering port device, continuing\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | } |
| 1078 | |
Johan Hovold | a65a6f1 | 2012-03-20 16:59:33 +0100 | [diff] [blame] | 1079 | serial->disconnected = 0; |
| 1080 | |
Greg Kroah-Hartman | e5b1e20 | 2013-06-07 11:04:28 -0700 | [diff] [blame] | 1081 | usb_serial_console_init(serial->port[0]->minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | exit: |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 1083 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | return 0; |
| 1085 | |
| 1086 | probe_error: |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1087 | usb_serial_put(serial); |
Ming Lei | d92a3ca | 2010-08-07 16:20:35 +0800 | [diff] [blame] | 1088 | module_put(type->driver.owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | return -EIO; |
| 1090 | } |
| 1091 | |
Greg Kroah-Hartman | 32078f9 | 2012-05-07 14:02:13 -0700 | [diff] [blame] | 1092 | static void usb_serial_disconnect(struct usb_interface *interface) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | { |
| 1094 | int i; |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1095 | struct usb_serial *serial = usb_get_intfdata(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | struct device *dev = &interface->dev; |
| 1097 | struct usb_serial_port *port; |
Johan Hovold | 3fff3b4 | 2014-05-26 19:23:34 +0200 | [diff] [blame] | 1098 | struct tty_struct *tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
Guennadi Liakhovetski | 73e487f | 2006-04-25 07:46:17 +0200 | [diff] [blame] | 1100 | usb_serial_console_disconnect(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1102 | mutex_lock(&serial->disc_mutex); |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1103 | /* must set a flag, to signal subdrivers */ |
| 1104 | serial->disconnected = 1; |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1105 | mutex_unlock(&serial->disc_mutex); |
| 1106 | |
Oliver Neukum | a1cd7e9 | 2008-01-16 17:18:52 +0100 | [diff] [blame] | 1107 | for (i = 0; i < serial->num_ports; ++i) { |
| 1108 | port = serial->port[i]; |
Johan Hovold | 3fff3b4 | 2014-05-26 19:23:34 +0200 | [diff] [blame] | 1109 | tty = tty_port_tty_get(&port->port); |
| 1110 | if (tty) { |
| 1111 | tty_vhangup(tty); |
| 1112 | tty_kref_put(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | } |
Johan Hovold | 3fff3b4 | 2014-05-26 19:23:34 +0200 | [diff] [blame] | 1114 | usb_serial_port_poison_urbs(port); |
| 1115 | wake_up_interruptible(&port->port.delta_msr_wait); |
| 1116 | cancel_work_sync(&port->work); |
| 1117 | if (device_is_registered(&port->dev)) |
| 1118 | device_del(&port->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | } |
Johan Hovold | 0f16cfe | 2013-03-21 12:36:42 +0100 | [diff] [blame] | 1120 | if (serial->type->disconnect) |
| 1121 | serial->type->disconnect(serial); |
Alan Stern | 2d93148 | 2009-04-14 11:31:02 -0400 | [diff] [blame] | 1122 | |
Alan Stern | 41bd34d | 2009-09-01 11:38:34 -0400 | [diff] [blame] | 1123 | /* 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] | 1124 | usb_serial_put(serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | dev_info(dev, "device disconnected\n"); |
| 1126 | } |
| 1127 | |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1128 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
| 1129 | { |
| 1130 | struct usb_serial *serial = usb_get_intfdata(intf); |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1131 | int i, r = 0; |
| 1132 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1133 | serial->suspending = 1; |
| 1134 | |
Ming Lei | 93e4f47 | 2013-03-15 12:08:54 +0800 | [diff] [blame] | 1135 | /* |
| 1136 | * serial->type->suspend() MUST return 0 in system sleep context, |
| 1137 | * otherwise, the resume callback has to recover device from |
| 1138 | * previous suspend failure. |
| 1139 | */ |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1140 | if (serial->type->suspend) { |
| 1141 | r = serial->type->suspend(serial, message); |
Oliver Neukum | a5f6005 | 2009-10-01 15:01:17 +0200 | [diff] [blame] | 1142 | if (r < 0) { |
| 1143 | serial->suspending = 0; |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1144 | goto err_out; |
Oliver Neukum | a5f6005 | 2009-10-01 15:01:17 +0200 | [diff] [blame] | 1145 | } |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1146 | } |
| 1147 | |
Johan Hovold | 3fff3b4 | 2014-05-26 19:23:34 +0200 | [diff] [blame] | 1148 | for (i = 0; i < serial->num_ports; ++i) |
| 1149 | usb_serial_port_poison_urbs(serial->port[i]); |
Oliver Neukum | 81e5b23 | 2009-07-21 08:47:34 +0200 | [diff] [blame] | 1150 | err_out: |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1151 | return r; |
| 1152 | } |
| 1153 | EXPORT_SYMBOL(usb_serial_suspend); |
| 1154 | |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 1155 | static void usb_serial_unpoison_port_urbs(struct usb_serial *serial) |
| 1156 | { |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 1157 | int i; |
| 1158 | |
Johan Hovold | 3fff3b4 | 2014-05-26 19:23:34 +0200 | [diff] [blame] | 1159 | for (i = 0; i < serial->num_ports; ++i) |
| 1160 | usb_serial_port_unpoison_urbs(serial->port[i]); |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 1161 | } |
| 1162 | |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1163 | int usb_serial_resume(struct usb_interface *intf) |
| 1164 | { |
| 1165 | struct usb_serial *serial = usb_get_intfdata(intf); |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1166 | int rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1167 | |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 1168 | usb_serial_unpoison_port_urbs(serial); |
| 1169 | |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1170 | serial->suspending = 0; |
Sarah Sharp | 8abaee2 | 2007-10-25 10:58:43 -0700 | [diff] [blame] | 1171 | if (serial->type->resume) |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1172 | rv = serial->type->resume(serial); |
| 1173 | else |
| 1174 | rv = usb_serial_generic_resume(serial); |
Oliver Neukum | f8bece8 | 2009-02-05 16:54:25 +0100 | [diff] [blame] | 1175 | |
Oliver Neukum | c49cfa91 | 2009-02-06 18:06:43 +0100 | [diff] [blame] | 1176 | return rv; |
Oliver Neukum | ec22559 | 2007-04-27 20:54:57 +0200 | [diff] [blame] | 1177 | } |
| 1178 | EXPORT_SYMBOL(usb_serial_resume); |
| 1179 | |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 1180 | static int usb_serial_reset_resume(struct usb_interface *intf) |
| 1181 | { |
| 1182 | struct usb_serial *serial = usb_get_intfdata(intf); |
| 1183 | int rv; |
| 1184 | |
Johan Hovold | 6a5c821 | 2013-03-21 12:36:49 +0100 | [diff] [blame] | 1185 | usb_serial_unpoison_port_urbs(serial); |
| 1186 | |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 1187 | serial->suspending = 0; |
Johan Hovold | ca0400d | 2014-03-12 19:09:41 +0100 | [diff] [blame] | 1188 | if (serial->type->reset_resume) { |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 1189 | rv = serial->type->reset_resume(serial); |
Johan Hovold | ca0400d | 2014-03-12 19:09:41 +0100 | [diff] [blame] | 1190 | } else { |
Greg Kroah-Hartman | dcd82cd | 2012-05-16 08:37:17 -0700 | [diff] [blame] | 1191 | rv = -EOPNOTSUPP; |
| 1192 | intf->needs_binding = 1; |
| 1193 | } |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 1194 | |
| 1195 | return rv; |
| 1196 | } |
| 1197 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 1198 | static const struct tty_operations serial_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | .open = serial_open, |
| 1200 | .close = serial_close, |
| 1201 | .write = serial_write, |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 1202 | .hangup = serial_hangup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | .write_room = serial_write_room, |
| 1204 | .ioctl = serial_ioctl, |
| 1205 | .set_termios = serial_set_termios, |
| 1206 | .throttle = serial_throttle, |
| 1207 | .unthrottle = serial_unthrottle, |
| 1208 | .break_ctl = serial_break, |
| 1209 | .chars_in_buffer = serial_chars_in_buffer, |
Johan Hovold | 0693196 | 2013-05-05 20:32:27 +0200 | [diff] [blame] | 1210 | .wait_until_sent = serial_wait_until_sent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | .tiocmget = serial_tiocmget, |
| 1212 | .tiocmset = serial_tiocmset, |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 1213 | .get_icount = serial_get_icount, |
| 1214 | .cleanup = serial_cleanup, |
| 1215 | .install = serial_install, |
Alexey Dobriyan | 6fd69d3 | 2009-03-31 15:19:21 -0700 | [diff] [blame] | 1216 | .proc_fops = &serial_proc_fops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | }; |
| 1218 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame] | 1219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | struct tty_driver *usb_serial_tty_driver; |
| 1221 | |
Greg Kroah-Hartman | 32078f9 | 2012-05-07 14:02:13 -0700 | [diff] [blame] | 1222 | /* Driver structure we register with the USB core */ |
| 1223 | static struct usb_driver usb_serial_driver = { |
| 1224 | .name = "usbserial", |
| 1225 | .probe = usb_serial_probe, |
| 1226 | .disconnect = usb_serial_disconnect, |
| 1227 | .suspend = usb_serial_suspend, |
| 1228 | .resume = usb_serial_resume, |
| 1229 | .no_dynamic_id = 1, |
| 1230 | .supports_autosuspend = 1, |
| 1231 | }; |
| 1232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | static int __init usb_serial_init(void) |
| 1234 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | int result; |
| 1236 | |
Greg Kroah-Hartman | 455b4f7 | 2013-06-06 10:31:35 -0700 | [diff] [blame] | 1237 | usb_serial_tty_driver = alloc_tty_driver(USB_SERIAL_TTY_MINORS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | if (!usb_serial_tty_driver) |
| 1239 | return -ENOMEM; |
| 1240 | |
| 1241 | /* Initialize our global data */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | result = bus_register(&usb_serial_bus_type); |
| 1243 | if (result) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1244 | pr_err("%s - registering bus driver failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | goto exit_bus; |
| 1246 | } |
| 1247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | usb_serial_tty_driver->driver_name = "usbserial"; |
Johan Hovold | 3e1f490 | 2011-11-10 17:40:43 +0100 | [diff] [blame] | 1249 | usb_serial_tty_driver->name = "ttyUSB"; |
Greg Kroah-Hartman | 455b4f7 | 2013-06-06 10:31:35 -0700 | [diff] [blame] | 1250 | usb_serial_tty_driver->major = USB_SERIAL_TTY_MAJOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1264 | pr_err("%s - tty_register_driver failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | goto exit_reg_driver; |
| 1266 | } |
| 1267 | |
| 1268 | /* register the USB driver */ |
| 1269 | result = usb_register(&usb_serial_driver); |
| 1270 | if (result < 0) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1271 | pr_err("%s - usb_register failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | goto exit_tty; |
| 1273 | } |
| 1274 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1275 | /* register the generic driver, if we should */ |
Greg Kroah-Hartman | 3033bc8 | 2012-09-18 16:05:17 +0100 | [diff] [blame] | 1276 | result = usb_serial_generic_register(); |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1277 | if (result < 0) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1278 | pr_err("%s - registering generic driver failed\n", __func__); |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1279 | goto exit_generic; |
| 1280 | } |
| 1281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | return result; |
| 1283 | |
Greg Kroah-Hartman | 06299db | 2005-05-26 05:55:55 -0700 | [diff] [blame] | 1284 | exit_generic: |
| 1285 | usb_deregister(&usb_serial_driver); |
| 1286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | exit_tty: |
| 1288 | tty_unregister_driver(usb_serial_tty_driver); |
| 1289 | |
| 1290 | exit_reg_driver: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | bus_unregister(&usb_serial_bus_type); |
| 1292 | |
| 1293 | exit_bus: |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1294 | pr_err("%s - returning with error %d\n", __func__, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | put_tty_driver(usb_serial_tty_driver); |
| 1296 | return result; |
| 1297 | } |
| 1298 | |
| 1299 | |
| 1300 | static void __exit usb_serial_exit(void) |
| 1301 | { |
| 1302 | usb_serial_console_exit(); |
| 1303 | |
| 1304 | usb_serial_generic_deregister(); |
| 1305 | |
| 1306 | usb_deregister(&usb_serial_driver); |
| 1307 | tty_unregister_driver(usb_serial_tty_driver); |
| 1308 | put_tty_driver(usb_serial_tty_driver); |
| 1309 | bus_unregister(&usb_serial_bus_type); |
Johannes Thumshirn | d23f47d | 2015-07-08 17:26:37 +0200 | [diff] [blame] | 1310 | idr_destroy(&serial_minors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | |
| 1314 | module_init(usb_serial_init); |
| 1315 | module_exit(usb_serial_exit); |
| 1316 | |
| 1317 | #define set_to_generic_if_null(type, function) \ |
| 1318 | do { \ |
| 1319 | if (!type->function) { \ |
| 1320 | type->function = usb_serial_generic_##function; \ |
Johan Hovold | c3452f5 | 2013-03-21 12:36:44 +0100 | [diff] [blame] | 1321 | pr_debug("%s: using generic " #function "\n", \ |
| 1322 | type->driver.name); \ |
| 1323 | } \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | } while (0) |
| 1325 | |
Johan Hovold | c3452f5 | 2013-03-21 12:36:44 +0100 | [diff] [blame] | 1326 | static void usb_serial_operations_init(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | { |
| 1328 | set_to_generic_if_null(device, open); |
| 1329 | set_to_generic_if_null(device, write); |
| 1330 | set_to_generic_if_null(device, close); |
| 1331 | set_to_generic_if_null(device, write_room); |
| 1332 | set_to_generic_if_null(device, chars_in_buffer); |
Johan Hovold | dcf0105 | 2013-05-08 17:51:43 +0200 | [diff] [blame] | 1333 | if (device->tx_empty) |
| 1334 | set_to_generic_if_null(device, wait_until_sent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | set_to_generic_if_null(device, read_bulk_callback); |
| 1336 | set_to_generic_if_null(device, write_bulk_callback); |
Johan Hovold | 2315432 | 2010-03-17 23:05:57 +0100 | [diff] [blame] | 1337 | set_to_generic_if_null(device, process_read_urb); |
Johan Hovold | eaa3bcb | 2010-03-17 23:06:08 +0100 | [diff] [blame] | 1338 | set_to_generic_if_null(device, prepare_write_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | } |
| 1340 | |
Greg Kroah-Hartman | f799e76 | 2012-02-24 12:50:30 -0800 | [diff] [blame] | 1341 | static int usb_serial_register(struct usb_serial_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | { |
| 1343 | int retval; |
| 1344 | |
Dave Young | e4abe66 | 2009-02-14 21:21:13 +0800 | [diff] [blame] | 1345 | if (usb_disabled()) |
| 1346 | return -ENODEV; |
| 1347 | |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1348 | if (!driver->description) |
| 1349 | driver->description = driver->driver.name; |
Alan Stern | 5620b5f | 2011-01-11 14:16:50 -0500 | [diff] [blame] | 1350 | if (!driver->usb_driver) { |
| 1351 | WARN(1, "Serial driver %s has no usb_driver\n", |
| 1352 | driver->description); |
| 1353 | return -EINVAL; |
| 1354 | } |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1355 | |
Johan Hovold | c3452f5 | 2013-03-21 12:36:44 +0100 | [diff] [blame] | 1356 | usb_serial_operations_init(driver); |
| 1357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | /* Add this device to our list of devices */ |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1359 | mutex_lock(&table_lock); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1360 | list_add(&driver->driver_list, &usb_serial_driver_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1362 | retval = usb_serial_bus_register(driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | if (retval) { |
Greg Kroah-Hartman | 92931d2 | 2012-09-13 16:30:31 -0700 | [diff] [blame] | 1364 | pr_err("problem %d when registering driver %s\n", retval, driver->description); |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1365 | list_del(&driver->driver_list); |
Johan Hovold | ca0400d | 2014-03-12 19:09:41 +0100 | [diff] [blame] | 1366 | } else { |
Greg Kroah-Hartman | ee42f6c | 2012-09-18 17:10:29 +0100 | [diff] [blame] | 1367 | pr_info("USB Serial support registered for %s\n", driver->description); |
Johan Hovold | ca0400d | 2014-03-12 19:09:41 +0100 | [diff] [blame] | 1368 | } |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1369 | mutex_unlock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | return retval; |
| 1371 | } |
| 1372 | |
Greg Kroah-Hartman | f799e76 | 2012-02-24 12:50:30 -0800 | [diff] [blame] | 1373 | static void usb_serial_deregister(struct usb_serial_driver *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | { |
Greg Kroah-Hartman | ee42f6c | 2012-09-18 17:10:29 +0100 | [diff] [blame] | 1375 | pr_info("USB Serial deregistering driver %s\n", device->description); |
Johan Hovold | 10164c2 | 2014-04-23 11:32:19 +0200 | [diff] [blame] | 1376 | |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1377 | mutex_lock(&table_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | list_del(&device->driver_list); |
Andi Kleen | 0daeed3 | 2010-06-01 23:04:42 +0200 | [diff] [blame] | 1379 | mutex_unlock(&table_lock); |
Johan Hovold | 10164c2 | 2014-04-23 11:32:19 +0200 | [diff] [blame] | 1380 | |
| 1381 | usb_serial_bus_deregister(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1384 | /** |
| 1385 | * usb_serial_register_drivers - register drivers for a usb-serial module |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1386 | * @serial_drivers: NULL-terminated array of pointers to drivers to be registered |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1387 | * @name: name of the usb_driver for this set of @serial_drivers |
| 1388 | * @id_table: list of all devices this @serial_drivers set binds to |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1389 | * |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1390 | * Registers all the drivers in the @serial_drivers array, and dynamically |
| 1391 | * creates a struct usb_driver with the name @name and id_table of @id_table. |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1392 | */ |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1393 | int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[], |
| 1394 | const char *name, |
| 1395 | const struct usb_device_id *id_table) |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1396 | { |
| 1397 | int rc; |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1398 | struct usb_driver *udriver; |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1399 | struct usb_serial_driver * const *sd; |
| 1400 | |
| 1401 | /* |
| 1402 | * udriver must be registered before any of the serial drivers, |
| 1403 | * because the store_new_id() routine for the serial drivers (in |
| 1404 | * bus.c) probes udriver. |
| 1405 | * |
| 1406 | * Performance hack: We don't want udriver to be probed until |
| 1407 | * the serial drivers are registered, because the probe would |
| 1408 | * simply fail for lack of a matching serial driver. |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1409 | * So we leave udriver's id_table set to NULL until we are all set. |
Alan Stern | 5cbe61c | 2012-05-07 11:20:06 -0400 | [diff] [blame] | 1410 | * |
| 1411 | * Suspend/resume support is implemented in the usb-serial core, |
| 1412 | * so fill in the PM-related fields in udriver. |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1413 | */ |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1414 | udriver = kzalloc(sizeof(*udriver), GFP_KERNEL); |
| 1415 | if (!udriver) |
| 1416 | return -ENOMEM; |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1417 | |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1418 | udriver->name = name; |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1419 | udriver->no_dynamic_id = 1; |
Alan Stern | 5cbe61c | 2012-05-07 11:20:06 -0400 | [diff] [blame] | 1420 | udriver->supports_autosuspend = 1; |
| 1421 | udriver->suspend = usb_serial_suspend; |
| 1422 | udriver->resume = usb_serial_resume; |
Greg Kroah-Hartman | 5026bb0 | 2012-05-07 13:48:33 -0700 | [diff] [blame] | 1423 | udriver->probe = usb_serial_probe; |
Greg Kroah-Hartman | 32078f9 | 2012-05-07 14:02:13 -0700 | [diff] [blame] | 1424 | udriver->disconnect = usb_serial_disconnect; |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 1425 | |
| 1426 | /* we only set the reset_resume field if the serial_driver has one */ |
| 1427 | for (sd = serial_drivers; *sd; ++sd) { |
Greg Kroah-Hartman | 44b0f08 | 2012-09-19 08:15:21 +0100 | [diff] [blame] | 1428 | if ((*sd)->reset_resume) { |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 1429 | udriver->reset_resume = usb_serial_reset_resume; |
| 1430 | break; |
Greg Kroah-Hartman | 44b0f08 | 2012-09-19 08:15:21 +0100 | [diff] [blame] | 1431 | } |
Greg Kroah-Hartman | 7186364 | 2012-05-15 15:40:00 -0700 | [diff] [blame] | 1432 | } |
| 1433 | |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1434 | rc = usb_register(udriver); |
| 1435 | if (rc) |
Alexey Klimov | 647024a | 2016-08-08 02:34:46 +0100 | [diff] [blame] | 1436 | goto failed_usb_register; |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1437 | |
| 1438 | for (sd = serial_drivers; *sd; ++sd) { |
| 1439 | (*sd)->usb_driver = udriver; |
| 1440 | rc = usb_serial_register(*sd); |
| 1441 | if (rc) |
| 1442 | goto failed; |
| 1443 | } |
| 1444 | |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1445 | /* Now set udriver's id_table and look for matches */ |
| 1446 | udriver->id_table = id_table; |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1447 | rc = driver_attach(&udriver->drvwrap.driver); |
| 1448 | return 0; |
| 1449 | |
| 1450 | failed: |
| 1451 | while (sd-- > serial_drivers) |
| 1452 | usb_serial_deregister(*sd); |
| 1453 | usb_deregister(udriver); |
Alexey Klimov | 647024a | 2016-08-08 02:34:46 +0100 | [diff] [blame] | 1454 | failed_usb_register: |
| 1455 | kfree(udriver); |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1456 | return rc; |
| 1457 | } |
| 1458 | EXPORT_SYMBOL_GPL(usb_serial_register_drivers); |
| 1459 | |
| 1460 | /** |
| 1461 | * usb_serial_deregister_drivers - deregister drivers for a usb-serial module |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1462 | * @serial_drivers: NULL-terminated array of pointers to drivers to be deregistered |
| 1463 | * |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1464 | * Deregisters all the drivers in the @serial_drivers array and deregisters and |
| 1465 | * frees the struct usb_driver that was created by the call to |
| 1466 | * usb_serial_register_drivers(). |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1467 | */ |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1468 | void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[]) |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1469 | { |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1470 | struct usb_driver *udriver = (*serial_drivers)->usb_driver; |
| 1471 | |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1472 | for (; *serial_drivers; ++serial_drivers) |
| 1473 | usb_serial_deregister(*serial_drivers); |
| 1474 | usb_deregister(udriver); |
Greg Kroah-Hartman | 68e2411 | 2012-05-08 15:46:14 -0700 | [diff] [blame] | 1475 | kfree(udriver); |
Alan Stern | 765e0ba | 2012-02-23 14:55:59 -0500 | [diff] [blame] | 1476 | } |
| 1477 | EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | |
Alan Cox | a8d6f0a | 2008-07-22 11:12:24 +0100 | [diff] [blame] | 1479 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1480 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | MODULE_LICENSE("GPL"); |