Release 4.16 drivers/usb/serial/usb-serial.c

// SPDX-License-Identifier: GPL-2.0
/*
 * USB Serial Converter driver
 *
 * Copyright (C) 2009 - 2013 Johan Hovold (jhovold@gmail.com)
 * Copyright (C) 1999 - 2012 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2000 Peter Berger (pberger@brimson.com)
 * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com)
 *
 * This driver was originally based on the ACM driver by Armin Fuerst (which was
 * based on a driver by Brad Keryan)
 *
 * See Documentation/usb/usb-serial.txt for more information on using this
 * driver
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/uaccess.h>
#include <linux/serial.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/kfifo.h>
#include <linux/idr.h>


#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

#define DRIVER_DESC "USB Serial Driver core"


#define USB_SERIAL_TTY_MAJOR	188

#define USB_SERIAL_TTY_MINORS	512	
/* should be enough for a while */

/* There is no MODULE_DEVICE_TABLE for usbserial.c.  Instead
   the MODULE_DEVICE_TABLE declarations in each serial driver
   cause the "hotplug" program to pull in whatever module is necessary
   via modprobe, and modprobe will load usbserial because the serial
   drivers depend on it.
*/

static DEFINE_IDR(serial_minors);
static DEFINE_MUTEX(table_lock);
static LIST_HEAD(usb_serial_driver_list);

/*
 * Look up the serial port structure.  If it is found and it hasn't been
 * disconnected, return with the parent usb_serial structure's disc_mutex held
 * and its refcount incremented.  Otherwise return NULL.
 */


struct usb_serial_port *usb_serial_port_get_by_minor(unsigned minor)
{
	struct usb_serial *serial;
	struct usb_serial_port *port;

	mutex_lock(&table_lock);
	port = idr_find(&serial_minors, minor);
	if (!port)
		goto exit;

	serial = port->serial;
	mutex_lock(&serial->disc_mutex);
	if (serial->disconnected) {
		mutex_unlock(&serial->disc_mutex);
		port = NULL;
	} else {
		kref_get(&serial->kref);
	}
exit:
	mutex_unlock(&table_lock);
	return port;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
47
47.00%
3
37.50%
Alan Stern
30
30.00%
1
12.50%
Oliver Neukum
15
15.00%
2
25.00%
Linus Torvalds (pre-git)
7
7.00%
1
12.50%
Linus Torvalds
1
1.00%
1
12.50%
Total
100
100.00%
8
100.00%



static int allocate_minors(struct usb_serial *serial, int num_ports)
{
	struct usb_serial_port *port;
	unsigned int i, j;
	int minor;

	dev_dbg(&serial->interface->dev, "%s %d\n", __func__, num_ports);

	mutex_lock(&table_lock);
	for (i = 0; i < num_ports; ++i) {
		port = serial->port[i];
		minor = idr_alloc(&serial_minors, port, 0,
					USB_SERIAL_TTY_MINORS, GFP_KERNEL);
		if (minor < 0)
			goto error;
		port->minor = minor;
		port->port_number = i;
	}
	serial->minors_reserved = 1;
	mutex_unlock(&table_lock);
	return 0;
error:
	/* unwind the already allocated minors */
	for (j = 0; j < i; ++j)
		idr_remove(&serial_minors, serial->port[j]->minor);
	mutex_unlock(&table_lock);
	return minor;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
86
51.81%
5
35.71%
Linus Torvalds (pre-git)
58
34.94%
1
7.14%
Oliver Neukum
16
9.64%
3
21.43%
Catalin(ux aka Dino) M. Boie
2
1.20%
1
7.14%
Linus Torvalds
1
0.60%
1
7.14%
Harvey Harrison
1
0.60%
1
7.14%
Johan Hovold
1
0.60%
1
7.14%
Stuart MacDonald
1
0.60%
1
7.14%
Total
166
100.00%
14
100.00%



static void release_minors(struct usb_serial *serial)
{
	int i;

	mutex_lock(&table_lock);
	for (i = 0; i < serial->num_ports; ++i)
		idr_remove(&serial_minors, serial->port[i]->minor);
	mutex_unlock(&table_lock);
	serial->minors_reserved = 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
33
53.23%
1
33.33%
Greg Kroah-Hartman
17
27.42%
1
33.33%
Alan Stern
12
19.35%
1
33.33%
Total
62
100.00%
3
100.00%



static void destroy_serial(struct kref *kref)
{
	struct usb_serial *serial;
	struct usb_serial_port *port;
	int i;

	serial = to_usb_serial(kref);

	/* return the minor range that this device had */
	if (serial->minors_reserved)
		release_minors(serial);

	if (serial->attached && serial->type->release)
		serial->type->release(serial);

	/* Now that nothing is using the ports, they can be freed */
	for (i = 0; i < serial->num_port_pointers; ++i) {
		port = serial->port[i];
		if (port) {
			port->serial = NULL;
			put_device(&port->dev);
		}
	}

	usb_put_intf(serial->interface);
	usb_put_dev(serial->dev);
	kfree(serial);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
56
43.08%
4
26.67%
Greg Kroah-Hartman
32
24.62%
3
20.00%
Linus Torvalds (pre-git)
17
13.08%
1
6.67%
Johan Hovold
13
10.00%
2
13.33%
Jim Radford
5
3.85%
1
6.67%
Lonnie Mendez
4
3.08%
2
13.33%
Linus Torvalds
2
1.54%
1
6.67%
Oliver Neukum
1
0.77%
1
6.67%
Total
130
100.00%
15
100.00%



void usb_serial_put(struct usb_serial *serial)
{
	kref_put(&serial->kref, destroy_serial);
}

Contributors
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Guennadi Liakhovetski
20
100.00%
1
100.00%
Total
20
100.00%
1
100.00%

/*****************************************************************************
 * Driver tty interface functions
 *****************************************************************************/

/**
 * serial_install - install tty
 * @driver: the driver (USB in our case)
 * @tty: the tty being created
 *
 * Create the termios objects for this tty.  We use the default
 * USB serial settings but permit them to be overridden by
 * serial->type->init_termios.
 *
 * This is the first place a new tty gets used.  Hence this is where we
 * acquire references to the usb_serial structure and the driver module,
 * where we store a pointer to the port, and where we do an autoresume.
 * All these actions are reversed in serial_cleanup().
 */


static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
{
	int idx = tty->index;
	struct usb_serial *serial;
	struct usb_serial_port *port;
	int retval = -ENODEV;

	port = usb_serial_port_get_by_minor(idx);
	if (!port)
		return retval;

	serial = port->serial;
	if (!try_module_get(serial->type->driver.owner))
		goto error_module_get;

	retval = usb_autopm_get_interface(serial->interface);
	if (retval)
		goto error_get_interface;

	retval = tty_port_install(&port->port, driver, tty);
	if (retval)
		goto error_init_termios;

	mutex_unlock(&serial->disc_mutex);

	/* allow the driver to update the settings */
	if (serial->type->init_termios)
		serial->type->init_termios(tty);

	tty->driver_data = port;

	return retval;

 error_init_termios:
	usb_autopm_put_interface(serial->interface);
 error_get_interface:
	module_put(serial->type->driver.owner);
 error_module_get:
	usb_serial_put(serial);
	mutex_unlock(&serial->disc_mutex);
	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
160
84.66%
4
57.14%
Jiri Slaby
24
12.70%
2
28.57%
Greg Kroah-Hartman
5
2.65%
1
14.29%
Total
189
100.00%
7
100.00%



static int serial_port_activate(struct tty_port *tport, struct tty_struct *tty)
{
	struct usb_serial_port *port =
		container_of(tport, struct usb_serial_port, port);
	struct usb_serial *serial = port->serial;
	int retval;

	mutex_lock(&serial->disc_mutex);
	if (serial->disconnected)
		retval = -ENODEV;
	else
		retval = port->serial->type->open(tty, port);
	mutex_unlock(&serial->disc_mutex);

	if (retval < 0)
		retval = usb_translate_errors(retval);

	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
43
42.16%
2
15.38%
Alan Cox
17
16.67%
3
23.08%
Johan Hovold
14
13.73%
2
15.38%
Greg Kroah-Hartman
13
12.75%
3
23.08%
Ganesh Varadarajan
13
12.75%
1
7.69%
Luiz Fernando N. Capitulino
1
0.98%
1
7.69%
James Woodcock
1
0.98%
1
7.69%
Total
102
100.00%
13
100.00%



static int serial_open(struct tty_struct *tty, struct file *filp)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	return tty_port_open(&port->port, tty, filp);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
41
83.67%
3
50.00%
Greg Kroah-Hartman
7
14.29%
2
33.33%
Johan Hovold
1
2.04%
1
16.67%
Total
49
100.00%
6
100.00%

/**
 * serial_port_shutdown - shut down hardware
 * @tport: tty port to shut down
 *
 * Shut down a USB serial port. Serialized against activate by the
 * tport mutex and kept to matching open/close pairs
 * of calls by the initialized flag.
 *
 * Not called if tty is console.
 */


static void serial_port_shutdown(struct tty_port *tport)
{
	struct usb_serial_port *port =
		container_of(tport, struct usb_serial_port, port);
	struct usb_serial_driver *drv = port->serial->type;

	if (drv->close)
		drv->close(port);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
32
64.00%
2
28.57%
Greg Kroah-Hartman
10
20.00%
2
28.57%
Al Borchers
4
8.00%
1
14.29%
Linus Torvalds (pre-git)
3
6.00%
1
14.29%
Johan Hovold
1
2.00%
1
14.29%
Total
50
100.00%
7
100.00%



static void serial_hangup(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	tty_port_hangup(&port->port);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
20
51.28%
3
33.33%
Alan Stern
9
23.08%
2
22.22%
Greg Kroah-Hartman
5
12.82%
1
11.11%
Oliver Neukum
3
7.69%
1
11.11%
Johan Hovold
1
2.56%
1
11.11%
Aristeu Sergio Rozanski Filho
1
2.56%
1
11.11%
Total
39
100.00%
9
100.00%



static void serial_close(struct tty_struct *tty, struct file *filp)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	tty_port_close(&port->port, tty, filp);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
42
87.50%
2
50.00%
Greg Kroah-Hartman
5
10.42%
1
25.00%
Johan Hovold
1
2.08%
1
25.00%
Total
48
100.00%
4
100.00%

/**
 * serial_cleanup - free resources post close/hangup
 * @port: port to free up
 *
 * Do the resource freeing and refcount dropping for the port.
 * Avoid freeing the console.
 *
 * Called asynchronously after the last tty kref is dropped.
 */


static void serial_cleanup(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct usb_serial *serial;
	struct module *owner;

	dev_dbg(tty->dev, "%s\n", __func__);

	/* The console is magical.  Do not hang up the console hardware
         * or there will be tears.
         */
	if (port->port.console)
		return;

	tty->driver_data = NULL;

	serial = port->serial;
	owner = serial->type->driver.owner;

	mutex_lock(&serial->disc_mutex);
	if (!serial->disconnected)
		usb_autopm_put_interface(serial->interface);
	mutex_unlock(&serial->disc_mutex);

	usb_serial_put(serial);
	module_put(owner);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
69
61.06%
3
37.50%
Alan Cox
26
23.01%
1
12.50%
Johan Hovold
11
9.73%
1
12.50%
Greg Kroah-Hartman
6
5.31%
2
25.00%
Dave Young
1
0.88%
1
12.50%
Total
113
100.00%
8
100.00%



static int serial_write(struct tty_struct *tty, const unsigned char *buf,
								int count)
{
	struct usb_serial_port *port = tty->driver_data;
	int retval = -ENODEV;

	if (port->serial->dev->state == USB_STATE_NOTATTACHED)
		goto exit;

	dev_dbg(tty->dev, "%s - %d byte(s)\n", __func__, count);

	retval = port->serial->type->write(tty, port, buf, count);
	if (retval < 0)
		retval = usb_translate_errors(retval);
exit:
	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
35
35.00%
1
7.69%
Greg Kroah-Hartman
32
32.00%
5
38.46%
Johan Hovold
14
14.00%
2
15.38%
Guennadi Liakhovetski
9
9.00%
1
7.69%
Luiz Fernando N. Capitulino
6
6.00%
1
7.69%
Alan Cox
2
2.00%
1
7.69%
Oliver Neukum
1
1.00%
1
7.69%
Harvey Harrison
1
1.00%
1
7.69%
Total
100
100.00%
13
100.00%



static int serial_write_room(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	return port->serial->type->write_room(tty);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
31
72.09%
1
12.50%
Greg Kroah-Hartman
8
18.60%
3
37.50%
Alan Cox
2
4.65%
2
25.00%
Harvey Harrison
1
2.33%
1
12.50%
Johan Hovold
1
2.33%
1
12.50%
Total
43
100.00%
8
100.00%



static int serial_chars_in_buffer(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct usb_serial *serial = port->serial;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (serial->disconnected)
		return 0;

	return serial->type->chars_in_buffer(tty);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
28
47.46%
1
10.00%
Johan Hovold
13
22.03%
3
30.00%
Greg Kroah-Hartman
9
15.25%
3
30.00%
Alan Cox
8
13.56%
2
20.00%
Harvey Harrison
1
1.69%
1
10.00%
Total
59
100.00%
10
100.00%



static void serial_wait_until_sent(struct tty_struct *tty, int timeout)
{
	struct usb_serial_port *port = tty->driver_data;
	struct usb_serial *serial = port->serial;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (!port->serial->type->wait_until_sent)
		return;

	mutex_lock(&serial->disc_mutex);
	if (!serial->disconnected)
		port->serial->type->wait_until_sent(tty, timeout);
	mutex_unlock(&serial->disc_mutex);
}

Contributors
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CommitProp
Johan Hovold
91
100.00%
1
100.00%
Total
91
100.00%
1
100.00%



static void serial_throttle(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (port->serial->type->throttle)
		port->serial->type->throttle(tty);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
39
75.00%
1
14.29%
Greg Kroah-Hartman
10
19.23%
3
42.86%
Johan Hovold
1
1.92%
1
14.29%
Harvey Harrison
1
1.92%
1
14.29%
Alan Cox
1
1.92%
1
14.29%
Total
52
100.00%
7
100.00%



static void serial_unthrottle(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (port->serial->type->unthrottle)
		port->serial->type->unthrottle(tty);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
39
75.00%
1
14.29%
Greg Kroah-Hartman
10
19.23%
3
42.86%
Alan Cox
1
1.92%
1
14.29%
Harvey Harrison
1
1.92%
1
14.29%
Johan Hovold
1
1.92%
1
14.29%
Total
52
100.00%
7
100.00%



static int serial_ioctl(struct tty_struct *tty,
					unsigned int cmd, unsigned long arg)
{
	struct usb_serial_port *port = tty->driver_data;
	int retval = -ENOIOCTLCMD;

	dev_dbg(tty->dev, "%s - cmd 0x%04x\n", __func__, cmd);

	switch (cmd) {
	case TIOCMIWAIT:
		if (port->serial->type->tiocmiwait)
			retval = port->serial->type->tiocmiwait(tty, arg);
		break;
	default:
		if (port->serial->type->ioctl)
			retval = port->serial->type->ioctl(tty, cmd, arg);
	}

	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
58
51.33%
2
18.18%
Johan Hovold
33
29.20%
3
27.27%
Greg Kroah-Hartman
20
17.70%
4
36.36%
Alan Cox
1
0.88%
1
9.09%
Harvey Harrison
1
0.88%
1
9.09%
Total
113
100.00%
11
100.00%



static void serial_set_termios(struct tty_struct *tty, struct ktermios *old)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (port->serial->type->set_termios)
		port->serial->type->set_termios(tty, port, old);
	else
		tty_termios_copy_hw(&tty->termios, old);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
46
63.89%
1
10.00%
Alan Cox
14
19.44%
4
40.00%
Greg Kroah-Hartman
10
13.89%
3
30.00%
Harvey Harrison
1
1.39%
1
10.00%
Johan Hovold
1
1.39%
1
10.00%
Total
72
100.00%
10
100.00%



static int serial_break(struct tty_struct *tty, int break_state)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (port->serial->type->break_ctl)
		port->serial->type->break_ctl(tty, break_state);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
42
70.00%
1
11.11%
Greg Kroah-Hartman
10
16.67%
3
33.33%
Alan Cox
6
10.00%
3
33.33%
Harvey Harrison
1
1.67%
1
11.11%
Johan Hovold
1
1.67%
1
11.11%
Total
60
100.00%
9
100.00%



static int serial_proc_show(struct seq_file *m, void *v)
{
	struct usb_serial *serial;
	struct usb_serial_port *port;
	int i;
	char tmp[40];

	seq_puts(m, "usbserinfo:1.0 driver:2.0\n");
	for (i = 0; i < USB_SERIAL_TTY_MINORS; ++i) {
		port = usb_serial_port_get_by_minor(i);
		if (port == NULL)
			continue;
		serial = port->serial;

		seq_printf(m, "%d:", i);
		if (serial->type->driver.owner)
			seq_printf(m, " module:%s",
				module_name(serial->type->driver.owner));
		seq_printf(m, " name:\"%s\"",
				serial->type->description);
		seq_printf(m, " vendor:%04x product:%04x",
			le16_to_cpu(serial->dev->descriptor.idVendor),
			le16_to_cpu(serial->dev->descriptor.idProduct));
		seq_printf(m, " num_ports:%d", serial->num_ports);
		seq_printf(m, " port:%d", port->port_number);
		usb_make_path(serial->dev, tmp, sizeof(tmp));
		seq_printf(m, " path:%s", tmp);

		seq_putc(m, '\n');
		usb_serial_put(serial);
		mutex_unlock(&serial->disc_mutex);
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
166
74.44%
10
55.56%
Alexey Dobriyan
25
11.21%
1
5.56%
Linus Torvalds (pre-git)
15
6.73%
4
22.22%
Alan Stern
8
3.59%
1
5.56%
Matthias Urlichs
6
2.69%
1
5.56%
Adrian Bunk
3
1.35%
1
5.56%
Total
223
100.00%
18
100.00%



static int serial_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, serial_proc_show, NULL);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alexey Dobriyan
23
88.46%
1
50.00%
Greg Kroah-Hartman
3
11.54%
1
50.00%
Total
26
100.00%
2
100.00%


static const struct file_operations serial_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= serial_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};



static int serial_tiocmget(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (port->serial->type->tiocmget)
		return port->serial->type->tiocmget(tty);
	return -EINVAL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
54
94.74%
5
62.50%
Alan Cox
1
1.75%
1
12.50%
Harvey Harrison
1
1.75%
1
12.50%
Johan Hovold
1
1.75%
1
12.50%
Total
57
100.00%
8
100.00%



static int serial_tiocmset(struct tty_struct *tty,
			    unsigned int set, unsigned int clear)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (port->serial->type->tiocmset)
		return port->serial->type->tiocmset(tty, set, clear);
	return -EINVAL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
66
95.65%
3
50.00%
Harvey Harrison
1
1.45%
1
16.67%
Alan Cox
1
1.45%
1
16.67%
Johan Hovold
1
1.45%
1
16.67%
Total
69
100.00%
6
100.00%



static int serial_get_icount(struct tty_struct *tty,
				struct serial_icounter_struct *icount)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(tty->dev, "%s\n", __func__);

	if (port->serial->type->get_icount)
		return port->serial->type->get_icount(tty, icount);
	return -EINVAL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
58
90.62%
1
33.33%
Greg Kroah-Hartman
5
7.81%
1
33.33%
Johan Hovold
1
1.56%
1
33.33%
Total
64
100.00%
3
100.00%

/*
 * We would be calling tty_wakeup here, but unfortunately some line
 * disciplines have an annoying habit of calling tty->write from
 * the write wakeup callback (e.g. n_hdlc.c).
 */


void usb_serial_port_softint(struct usb_serial_port *port)
{
	schedule_work(&port->work);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Pete Zaitcev
15
83.33%
1
50.00%
Greg Kroah-Hartman
3
16.67%
1
50.00%
Total
18
100.00%
2
100.00%

EXPORT_SYMBOL_GPL(usb_serial_port_softint);



static void usb_serial_port_work(struct work_struct *work)
{
	struct usb_serial_port *port =
		container_of(work, struct usb_serial_port, work);

	tty_port_tty_wakeup(&port->port);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
13
38.24%
2
28.57%
David Howells
12
35.29%
1
14.29%
Pete Zaitcev
4
11.76%
1
14.29%
Alan Cox
4
11.76%
2
28.57%
Jiri Slaby
1
2.94%
1
14.29%
Total
34
100.00%
7
100.00%



static void usb_serial_port_poison_urbs(struct usb_serial_port *port)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
		usb_poison_urb(port->read_urbs[i]);
	for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)
		usb_poison_urb(port->write_urbs[i]);

	usb_poison_urb(port->interrupt_in_urb);
	usb_poison_urb(port->interrupt_out_urb);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
65
77.38%
3
42.86%
Pete Zaitcev
9
10.71%
1
14.29%
Oliver Neukum
5
5.95%
1
14.29%
Greg Kroah-Hartman
5
5.95%
2
28.57%
Total
84
100.00%
7
100.00%



static void usb_serial_port_unpoison_urbs(struct usb_serial_port *port)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
		usb_unpoison_urb(port->read_urbs[i]);
	for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)
		usb_unpoison_urb(port->write_urbs[i]);

	usb_unpoison_urb(port->interrupt_in_urb);
	usb_unpoison_urb(port->interrupt_out_urb);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
69
82.14%
1
20.00%
Greg Kroah-Hartman
10
11.90%
2
40.00%
Oliver Neukum
5
5.95%
2
40.00%
Total
84
100.00%
5
100.00%



static void usb_serial_port_release(struct device *dev)
{
	struct usb_serial_port *port = to_usb_serial_port(dev);
	int i;

	dev_dbg(dev, "%s\n", __func__);

	usb_free_urb(port->interrupt_in_urb);
	usb_free_urb(port->interrupt_out_urb);
	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
		usb_free_urb(port->read_urbs[i]);
		kfree(port->bulk_in_buffers[i]);
	}
	for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {
		usb_free_urb(port->write_urbs[i]);
		kfree(port->bulk_out_buffers[i]);
	}
	kfifo_free(&port->write_fifo);
	kfree(port->interrupt_in_buffer);
	kfree(port->interrupt_out_buffer);
	tty_port_destroy(&port->port);
	kfree(port);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
80
49.38%
3
25.00%
Greg Kroah-Hartman
26
16.05%
2
16.67%
Alan Stern
17
10.49%
1
8.33%
Lonnie Mendez
15
9.26%
2
16.67%
Jiri Slaby
8
4.94%
1
8.33%
Oliver Neukum
8
4.94%
1
8.33%
David VomLehn
7
4.32%
1
8.33%
Stefani Seibold
1
0.62%
1
8.33%
Total
162
100.00%
12
100.00%



static struct usb_serial *create_serial(struct usb_device *dev,
					struct usb_interface *interface,
					struct usb_serial_driver *driver)
{
	struct usb_serial *serial;

	serial = kzalloc(sizeof(*serial), GFP_KERNEL);
	if (!serial)
		return NULL;
	serial->dev = usb_get_dev(dev);
	serial->type = driver;
	serial->interface = usb_get_intf(interface);
	kref_init(&serial->kref);
	mutex_init(&serial->disc_mutex);
	serial->minors_reserved = 0;

	return serial;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
82
83.67%
6
60.00%
Oliver Neukum
8
8.16%
1
10.00%
Alan Stern
4
4.08%
1
10.00%
Johan Hovold
3
3.06%
1
10.00%
Eric Sesterhenn / Snakebyte
1
1.02%
1
10.00%
Total
98
100.00%
10
100.00%



static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf,
					    struct usb_serial_driver *drv)
{
	struct usb_dynid *dynid;

	spin_lock(&drv->dynids.lock);
	list_for_each_entry(dynid, &drv->dynids.list, node) {
		if (usb_match_one_id(intf, &dynid->id)) {
			spin_unlock(&drv->dynids.lock);
			return &dynid->id;
		}
	}
	spin_unlock(&drv->dynids.lock);
	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
87
100.00%
1
100.00%
Total
87
100.00%
1
100.00%



static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv,
						struct usb_interface *intf)
{
	const struct usb_device_id *id;

	id = usb_match_id(intf, drv->id_table);
	if (id) {
		dev_dbg(&intf->dev, "static descriptor matches\n");
		goto exit;
	}
	id = match_dynamic_id(intf, drv);
	if (id)
		dev_dbg(&intf->dev, "dynamic descriptor matches\n");
exit:
	return id;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
83
100.00%
2
100.00%
Total
83
100.00%
2
100.00%

/* Caller must hold table_lock */


static struct usb_serial_driver *search_serial_device(
					struct usb_interface *iface)
{
	const struct usb_device_id *id = NULL;
	struct usb_serial_driver *drv;
	struct usb_driver *driver = to_usb_driver(iface->dev.driver);

	/* Check if the usb id matches a known device */
	list_for_each_entry(drv, &usb_serial_driver_list, driver_list) {
		if (drv->usb_driver == driver)
			id = get_iface_id(drv, iface);
		if (id)
			return drv;
	}

	return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luiz Fernando N. Capitulino
41
52.56%
1
16.67%
Björn Mork
24
30.77%
1
16.67%
Alan Stern
7
8.97%
1
16.67%
Greg Kroah-Hartman
5
6.41%
2
33.33%
Adrian Bunk
1
1.28%
1
16.67%
Total
78
100.00%
6
100.00%



static int serial_port_carrier_raised(struct tty_port *port)
{
	struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
	struct usb_serial_driver *drv = p->serial->type;

	if (drv->carrier_raised)
		return drv->carrier_raised(p);
	/* No carrier control - don't block */
	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
54
98.18%
1
50.00%
Johan Hovold
1
1.82%
1
50.00%
Total
55
100.00%
2
100.00%



static void serial_port_dtr_rts(struct tty_port *port, int on)
{
	struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
	struct usb_serial_driver *drv = p->serial->type;

	if (drv->dtr_rts)
		drv->dtr_rts(p, on);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
47
85.45%
1
25.00%
Johan Hovold
8
14.55%
3
75.00%
Total
55
100.00%
4
100.00%



static ssize_t port_number_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct usb_serial_port *port = to_usb_serial_port(dev);

	return sprintf(buf, "%u\n", port->port_number);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
42
100.00%
1
100.00%
Total
42
100.00%
1
100.00%

static DEVICE_ATTR_RO(port_number);


static struct attribute *usb_serial_port_attrs[] = {
	&dev_attr_port_number.attr,
	NULL
};
ATTRIBUTE_GROUPS(usb_serial_port);


static const struct tty_port_operations serial_port_ops = {
	.carrier_raised		= serial_port_carrier_raised,
	.dtr_rts		= serial_port_dtr_rts,
	.activate		= serial_port_activate,
	.shutdown		= serial_port_shutdown,
};



static void find_endpoints(struct usb_serial *serial,
					struct usb_serial_endpoints *epds)
{
	struct device *dev = &serial->interface->dev;
	struct usb_host_interface *iface_desc;
	struct usb_endpoint_descriptor *epd;
	unsigned int i;

	BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_in) < USB_MAXENDPOINTS / 2);
	BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_out) < USB_MAXENDPOINTS / 2);
	BUILD_BUG_ON(ARRAY_SIZE(epds->interrupt_in) < USB_MAXENDPOINTS / 2);
	BUILD_BUG_ON(ARRAY_SIZE(epds->interrupt_out) < USB_MAXENDPOINTS / 2);

	iface_desc = serial->interface->cur_altsetting;
	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		epd = &iface_desc->endpoint[i].desc;

		if (usb_endpoint_is_bulk_in(epd)) {
			dev_dbg(dev, "found bulk in on endpoint %u\n", i);
			epds->bulk_in[epds->num_bulk_in++] = epd;
		} else if (usb_endpoint_is_bulk_out(epd)) {
			dev_dbg(dev, "found bulk out on endpoint %u\n", i);
			epds->bulk_out[epds->num_bulk_out++] = epd;
		} else if (usb_endpoint_is_int_in(epd)) {
			dev_dbg(dev, "found interrupt in on endpoint %u\n", i);
			epds->interrupt_in[epds->num_interrupt_in++] = epd;
		} else if (usb_endpoint_is_int_out(epd)) {
			dev_dbg(dev, "found interrupt out on endpoint %u\n", i);
			epds->interrupt_out[epds->num_interrupt_out++] = epd;
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
260
100.00%
2
100.00%
Total
260
100.00%
2
100.00%



static int setup_port_bulk_in(struct usb_serial_port *port,
					struct usb_endpoint_descriptor *epd)
{
	struct usb_serial_driver *type = port->serial->type;
	struct usb_device *udev = port->serial->dev;
	int buffer_size;
	int i;

	buffer_size = max_t(int, type->bulk_in_size, usb_endpoint_maxp(epd));
	port->bulk_in_size = buffer_size;
	port->bulk_in_endpointAddress = epd->bEndpointAddress;

	for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
		set_bit(i, &port->read_urbs_free);
		port->read_urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
		if (!port->read_urbs[i])
			return -ENOMEM;
		port->bulk_in_buffers[i] = kmalloc(buffer_size, GFP_KERNEL);
		if (!port->bulk_in_buffers[i])
			return -ENOMEM;
		usb_fill_bulk_urb(port->read_urbs[i], udev,
				usb_rcvbulkpipe(udev, epd->bEndpointAddress),
				port->bulk_in_buffers[i], buffer_size,
				type->read_bulk_callback, port);
	}

	port->read_urb = port->read_urbs[0];
	port->bulk_in_buffer = port->bulk_in_buffers[0];

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
155
70.14%
2
12.50%
Linus Torvalds (pre-git)
24
10.86%
3
18.75%
Greg Kroah-Hartman
22
9.95%
5
31.25%
Andi Kleen
13
5.88%
1
6.25%
Luiz Fernando N. Capitulino
3
1.36%
2
12.50%
Oliver Neukum
2
0.90%
1
6.25%
Linus Torvalds
1
0.45%
1
6.25%
Stuart MacDonald
1
0.45%
1
6.25%
Total
221
100.00%
16
100.00%



static int setup_port_bulk_out(struct usb_serial_port *port,
					struct usb_endpoint_descriptor *epd)
{
	struct usb_serial_driver *type = port->serial->type;
	struct usb_device *udev = port->serial->dev;
	int buffer_size;
	int i;

	if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL))
		return -ENOMEM;
	if (type->bulk_out_size)
		buffer_size = type->bulk_out_size;
	else
		buffer_size = usb_endpoint_maxp(epd);
	port->bulk_out_size = buffer_size;
	port->bulk_out_endpointAddress = epd->bEndpointAddress;

	for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {
		set_bit(i, &port->write_urbs_free);
		port->write_urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
		if (!port->write_urbs[i])
			return -ENOMEM;
		port->bulk_out_buffers[i] = kmalloc(buffer_size, GFP_KERNEL);
		if (!port->bulk_out_buffers[i])
			return -ENOMEM;
		usb_fill_bulk_urb(port->write_urbs[i], udev,
				usb_sndbulkpipe(udev, epd->bEndpointAddress),
				port->bulk_out_buffers[i], buffer_size,
				type->write_bulk_callback, port);
	}

	port->write_urb = port->write_urbs[0];
	port->bulk_out_buffer = port->bulk_out_buffers[0];

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
243
100.00%
1
100.00%
Total
243
100.00%
1
100.00%



static int setup_port_interrupt_in(struct usb_serial_port *port,
					struct usb_endpoint_descriptor *epd)
{
	struct usb_serial_driver *type = port->serial->type;
	struct usb_device *udev = port->serial->dev;
	int buffer_size;

	port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!port->interrupt_in_urb)
		return -ENOMEM;
	buffer_size = usb_endpoint_maxp(epd);
	port->interrupt_in_endpointAddress = epd->bEndpointAddress;
	port->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
	if (!port->interrupt_in_buffer)
		return -ENOMEM;
	usb_fill_int_urb(port->interrupt_in_urb, udev,
			usb_rcvintpipe(udev, epd->bEndpointAddress),
			port->interrupt_in_buffer, buffer_size,
			type->read_int_callback, port,
			epd->bInterval);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
136
99.27%
1
50.00%
Greg Kroah-Hartman
1
0.73%
1
50.00%
Total
137
100.00%
2
100.00%



static int setup_port_interrupt_out(struct usb_serial_port *port,
					struct usb_endpoint_descriptor *epd)
{
	struct usb_serial_driver *type = port->serial->type;
	struct usb_device *udev = port->serial->dev;
	int buffer_size;

	port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!port->interrupt_out_urb)
		return -ENOMEM;
	buffer_size = usb_endpoint_maxp(epd);
	port->interrupt_out_size = buffer_size;
	port->interrupt_out_endpointAddress = epd->bEndpointAddress;
	port->interrupt_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
	if (!port->interrupt_out_buffer)
		return -ENOMEM;
	usb_fill_int_urb(port->interrupt_out_urb, udev,
			usb_sndintpipe(udev, epd->bEndpointAddress),
			port->interrupt_out_buffer, buffer_size,
			type->write_int_callback, port,
			epd->bInterval);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
137
95.80%
1
33.33%
Greg Kroah-Hartman
6
4.20%
2
66.67%
Total
143
100.00%
3
100.00%



static int usb_serial_probe(struct usb_interface *interface,
			       const struct usb_device_id *id)
{
	struct device *ddev = &interface->dev;
	struct usb_device *dev = interface_to_usbdev(interface);
	struct usb_serial *serial = NULL;
	struct usb_serial_port *port;
	struct usb_serial_endpoints *epds;
	struct usb_serial_driver *type = NULL;
	int retval;
	int i;
	int num_ports = 0;
	unsigned char max_endpoints;

	mutex_lock(&table_lock);
	type = search_serial_device(interface);
	if (!type) {
		mutex_unlock(&table_lock);
		dev_dbg(ddev, "none matched\n");
		return -ENODEV;
	}

	if (!try_module_get(type->driver.owner)) {
		mutex_unlock(&table_lock);
		dev_err(ddev, "module get failed, exiting\n");
		return -EIO;
	}
	mutex_unlock(&table_lock);

	serial = create_serial(dev, interface, type);
	if (!serial) {
		retval = -ENOMEM;
		goto err_put_module;
	}

	/* if this device type has a probe function, call it */
	if (type->probe) {
		const struct usb_device_id *id;

		id = get_iface_id(type, interface);
		retval = type->probe(serial, id);

		if (retval) {
			dev_dbg(ddev, "sub driver rejected device\n");
			goto err_put_serial;
		}
	}

	/* descriptor matches, let's find the endpoints needed */
	epds = kzalloc(sizeof(*epds), GFP_KERNEL);
	if (!epds) {
		retval = -ENOMEM;
		goto err_put_serial;
	}

	find_endpoints(serial, epds);

	if (epds->num_bulk_in < type->num_bulk_in ||
			epds->num_bulk_out < type->num_bulk_out ||
			epds->num_interrupt_in < type->num_interrupt_in ||
			epds->num_interrupt_out < type->num_interrupt_out) {
		dev_err(ddev, "required endpoints missing\n");
		retval = -ENODEV;
		goto err_free_epds;
	}

	if (type->calc_num_ports) {
		retval = type->calc_num_ports(serial, epds);
		if (retval < 0)
			goto err_free_epds;
		num_ports = retval;
	}

	if (!num_ports)
		num_ports = type->num_ports;

	if (num_ports > MAX_NUM_PORTS) {
		dev_warn(ddev, "too many ports requested: %d\n", num_ports);
		num_ports = MAX_NUM_PORTS;
	}

	serial->num_ports = (unsigned char)num_ports;
	serial->num_bulk_in = epds->num_bulk_in;
	serial->num_bulk_out = epds->num_bulk_out;
	serial->num_interrupt_in = epds->num_interrupt_in;
	serial->num_interrupt_out = epds->num_interrupt_out;

	/* found all that we need */
	dev_info(ddev, "%s converter detected\n", type->description);

	/* create our ports, we need as many as the max endpoints */
	/* we don't use num_ports here because some devices have more
           endpoint pairs than ports */
	max_endpoints = max(epds->num_bulk_in, epds->num_bulk_out);
	max_endpoints = max(max_endpoints, epds->num_interrupt_in);
	max_endpoints = max(max_endpoints, epds->num_interrupt_out);
	max_endpoints = max(max_endpoints, serial->num_ports);
	serial->num_port_pointers = max_endpoints;

	dev_dbg(ddev, "setting up %d port structure(s)\n", max_endpoints);
	for (i = 0; i < max_endpoints; ++i) {
		port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
		if (!port) {
			retval = -ENOMEM;
			goto err_free_epds;
		}
		tty_port_init(&port->port);
		port->port.ops = &serial_port_ops;
		port->serial = serial;
		spin_lock_init(&port->lock);
		/* Keep this for private driver use for the moment but
                   should probably go away */
		INIT_WORK(&port->work, usb_serial_port_work);
		serial->port[i] = port;
		port->dev.parent = &interface->dev;
		port->dev.driver = NULL;
		port->dev.bus = &usb_serial_bus_type;
		port->dev.release = &usb_serial_port_release;
		port->dev.groups = usb_serial_port_groups;
		device_initialize(&port->dev);
	}

	/* set up the endpoint information */
	for (i = 0; i < epds->num_bulk_in; ++i) {
		retval = setup_port_bulk_in(serial->port[i], epds->bulk_in[i]);
		if (retval)
			goto err_free_epds;
	}

	for (i = 0; i < epds->num_bulk_out; ++i) {
		retval = setup_port_bulk_out(serial->port[i],
				epds->bulk_out[i]);
		if (retval)
			goto err_free_epds;
	}

	if (serial->type->read_int_callback) {
		for (i = 0; i < epds->num_interrupt_in; ++i) {
			retval = setup_port_interrupt_in(serial->port[i],
					epds->interrupt_in[i]);
			if (retval)
				goto err_free_epds;
		}
	} else if (epds->num_interrupt_in) {
		dev_dbg(ddev, "The device claims to support interrupt in transfers, but read_int_callback is not defined\n");
	}

	if (serial->type->write_int_callback) {
		for (i = 0; i < epds->num_interrupt_out; ++i) {
			retval = setup_port_interrupt_out(serial->port[i],
					epds->interrupt_out[i]);
			if (retval)
				goto err_free_epds;
		}
	} else if (epds->num_interrupt_out) {
		dev_dbg(ddev, "The device claims to support interrupt out transfers, but write_int_callback is not defined\n");
	}

	usb_set_intfdata(interface, serial);

	/* if this device type has an attach function, call it */
	if (type->attach) {
		retval = type->attach(serial);
		if (retval < 0)
			goto err_free_epds;
		serial->attached = 1;
		if (retval > 0) {
			/* quietly accept this device, but don't bind to a
                           serial port as it's about to disappear */
			serial->num_ports = 0;
			goto exit;
		}
	} else {
		serial->attached = 1;
	}

	retval = allocate_minors(serial, num_ports);
	if (retval) {
		dev_err(ddev, "No more free serial minor numbers\n");
		goto err_free_epds;
	}

	/* register all of the individual ports with the driver core */
	for (i = 0; i < num_ports; ++i) {
		port = serial->port[i];
		dev_set_name(&port->dev, "ttyUSB%d", port->minor);
		dev_dbg(ddev, "registering %s\n", dev_name(&port->dev));
		device_enable_async_suspend(&port->dev);

		retval = device_add(&port->dev);
		if (retval)
			dev_err(ddev, "Error registering port device, continuing\n");
	}

	if (num_ports > 0)
		usb_serial_console_init(serial->port[0]->minor);
exit:
	kfree(epds);
	module_put(type->driver.owner);
	return 0;

err_free_epds:
	kfree(epds);
err_put_serial:
	usb_serial_put(serial);
err_put_module:
	module_put(type->driver.owner);

	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
649
58.63%
17
30.36%
Greg Kroah-Hartman
181
16.35%
13
23.21%
Linus Torvalds (pre-git)
96
8.67%
6
10.71%
Lonnie Mendez
72
6.50%
1
1.79%
Alan Stern
39
3.52%
4
7.14%
Lei Ming
26
2.35%
2
3.57%
Oliver Neukum
15
1.36%
1
1.79%
Ganesh Varadarajan
7
0.63%
1
1.79%
Alan Cox
5
0.45%
3
5.36%
Kay Sievers
5
0.45%
2
3.57%
Stuart MacDonald
3
0.27%
1
1.79%
David VomLehn
3
0.27%
1
1.79%
Linus Torvalds
3
0.27%
1
1.79%
Eric Sesterhenn / Snakebyte
1
0.09%
1
1.79%
Luiz Fernando N. Capitulino
1
0.09%
1
1.79%
Stefani Seibold
1
0.09%
1
1.79%
Total
1107
100.00%
56
100.00%



static void usb_serial_disconnect(struct usb_interface *interface)
{
	int i;
	struct usb_serial *serial = usb_get_intfdata(interface);
	struct device *dev = &interface->dev;
	struct usb_serial_port *port;
	struct tty_struct *tty;

	usb_serial_console_disconnect(serial);

	mutex_lock(&serial->disc_mutex);
	/* must set a flag, to signal subdrivers */
	serial->disconnected = 1;
	mutex_unlock(&serial->disc_mutex);

	for (i = 0; i < serial->num_ports; ++i) {
		port = serial->port[i];
		tty = tty_port_tty_get(&port->port);
		if (tty) {
			tty_vhangup(tty);
			tty_kref_put(tty);
		}
		usb_serial_port_poison_urbs(port);
		wake_up_interruptible(&port->port.delta_msr_wait);
		cancel_work_sync(&port->work);
		if (device_is_registered(&port->dev))
			device_del(&port->dev);
	}
	if (serial->type->disconnect)
		serial->type->disconnect(serial);

	/* let the last holder of this object cause it to be cleaned up */
	usb_serial_put(serial);
	dev_info(dev, "device disconnected\n");
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
43
22.05%
5
25.00%
Edwin Olson
41
21.03%
1
5.00%
Greg Kroah-Hartman
39
20.00%
3
15.00%
Johan Hovold
26
13.33%
4
20.00%
Oliver Neukum
20
10.26%
2
10.00%
Alan Cox
16
8.21%
3
15.00%
Guennadi Liakhovetski
6
3.08%
1
5.00%
Linus Torvalds (pre-git)
4
2.05%
1
5.00%
Total
195
100.00%
20
100.00%



int usb_serial_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct usb_serial *serial = usb_get_intfdata(intf);
	int i, r = 0;

	serial->suspending = 1;

	/*
         * serial->type->suspend() MUST return 0 in system sleep context,
         * otherwise, the resume callback has to recover device from
         * previous suspend failure.
         */
	if (serial->type->suspend) {
		r = serial->type->suspend(serial, message);
		if (r < 0) {
			serial->suspending = 0;
			goto err_out;
		}
	}

	for (i = 0; i < serial->num_ports; ++i)
		usb_serial_port_poison_urbs(serial->port[i]);
err_out:
	return r;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Oliver Neukum
104
97.20%
4
66.67%
Johan Hovold
2
1.87%
1
16.67%
Ming Lei
1
0.93%
1
16.67%
Total
107
100.00%
6
100.00%

EXPORT_SYMBOL(usb_serial_suspend);



static void usb_serial_unpoison_port_urbs(struct usb_serial *serial)
{
	int i;

	for (i = 0; i < serial->num_ports; ++i)
		usb_serial_port_unpoison_urbs(serial->port[i]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
39
100.00%
2
100.00%
Total
39
100.00%
2
100.00%



int usb_serial_resume(struct usb_interface *intf)
{
	struct usb_serial *serial = usb_get_intfdata(intf);
	int rv;

	usb_serial_unpoison_port_urbs(serial);

	serial->suspending = 0;
	if (serial->type->resume)
		rv = serial->type->resume(serial);
	else
		rv = usb_serial_generic_resume(serial);

	return rv;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Oliver Neukum
49
76.56%
3
60.00%
Sarah Sharp
10
15.62%
1
20.00%
Johan Hovold
5
7.81%
1
20.00%
Total
64
100.00%
5
100.00%

EXPORT_SYMBOL(usb_serial_resume);



static int usb_serial_reset_resume(struct usb_interface *intf)
{
	struct usb_serial *serial = usb_get_intfdata(intf);
	int rv;

	usb_serial_unpoison_port_urbs(serial);

	serial->suspending = 0;
	if (serial->type->reset_resume) {
		rv = serial->type->reset_resume(serial);
	} else {
		rv = -EOPNOTSUPP;
		intf->needs_binding = 1;
	}

	return rv;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
66
90.41%
2
50.00%
Johan Hovold
7
9.59%
2
50.00%
Total
73
100.00%
4
100.00%


static const struct tty_operations serial_ops = {
	.open =			serial_open,
	.close =		serial_close,
	.write =		serial_write,
	.hangup =		serial_hangup,
	.write_room =		serial_write_room,
	.ioctl =		serial_ioctl,
	.set_termios =		serial_set_termios,
	.throttle =		serial_throttle,
	.unthrottle =		serial_unthrottle,
	.break_ctl =		serial_break,
	.chars_in_buffer =	serial_chars_in_buffer,
	.wait_until_sent =	serial_wait_until_sent,
	.tiocmget =		serial_tiocmget,
	.tiocmset =		serial_tiocmset,
	.get_icount =		serial_get_icount,
	.cleanup =		serial_cleanup,
	.install =		serial_install,
	.proc_fops =		&serial_proc_fops,
};



struct tty_driver *usb_serial_tty_driver;



static int __init usb_serial_init(void)
{
	int result;

	usb_serial_tty_driver = alloc_tty_driver(USB_SERIAL_TTY_MINORS);
	if (!usb_serial_tty_driver)
		return -ENOMEM;

	/* Initialize our global data */
	result = bus_register(&usb_serial_bus_type);
	if (result) {
		pr_err("%s - registering bus driver failed\n", __func__);
		goto exit_bus;
	}

	usb_serial_tty_driver->driver_name = "usbserial";
	usb_serial_tty_driver->name = "ttyUSB";
	usb_serial_tty_driver->major = USB_SERIAL_TTY_MAJOR;
	usb_serial_tty_driver->minor_start = 0;
	usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
	usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
	usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW |
						TTY_DRIVER_DYNAMIC_DEV;
	usb_serial_tty_driver->init_termios = tty_std_termios;
	usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD
							| HUPCL | CLOCAL;
	usb_serial_tty_driver->init_termios.c_ispeed = 9600;
	usb_serial_tty_driver->init_termios.c_ospeed = 9600;
	tty_set_operations(usb_serial_tty_driver, &serial_ops);
	result = tty_register_driver(usb_serial_tty_driver);
	if (result) {
		pr_err("%s - tty_register_driver failed\n", __func__);
		goto exit_reg_driver;
	}

	/* register the generic driver, if we should */
	result = usb_serial_generic_register();
	if (result < 0) {
		pr_err("%s - registering generic driver failed\n", __func__);
		goto exit_generic;
	}

	return result;

exit_generic:
	tty_unregister_driver(usb_serial_tty_driver);

exit_reg_driver:
	bus_unregister(&usb_serial_bus_type);

exit_bus:
	pr_err("%s - returning with error %d\n", __func__, result);
	put_tty_driver(usb_serial_tty_driver);
	return result;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
72
31.72%
1
4.76%
Greg Kroah-Hartman
61
26.87%
9
42.86%
Linus Torvalds (pre-git)
42
18.50%
4
19.05%
Luiz Fernando N. Capitulino
24
10.57%
1
4.76%
Alan Cox
16
7.05%
1
4.76%
Linus Torvalds
7
3.08%
3
14.29%
Harvey Harrison
4
1.76%
1
4.76%
Steven Cole
1
0.44%
1
4.76%
Total
227
100.00%
21
100.00%



static void __exit usb_serial_exit(void)
{
	usb_serial_console_exit();

	usb_serial_generic_deregister();

	tty_unregister_driver(usb_serial_tty_driver);
	put_tty_driver(usb_serial_tty_driver);
	bus_unregister(&usb_serial_bus_type);
	idr_destroy(&serial_minors);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
12
32.43%
3
25.00%
Greg Kroah-Hartman
12
32.43%
6
50.00%
Johannes Thumshirn
6
16.22%
1
8.33%
Al Viro
5
13.51%
1
8.33%
Linus Torvalds
2
5.41%
1
8.33%
Total
37
100.00%
12
100.00%

module_init(usb_serial_init);
module_exit(usb_serial_exit);


#define set_to_generic_if_null(type, function)				\
	do {                                                            \
                if (!type->function) {                                  \
                        type->function = usb_serial_generic_##function; \
                        pr_debug("%s: using generic " #function "\n",   \
                                                type->driver.name);     \
                }                                                       \
        } while (0)



static void usb_serial_operations_init(struct usb_serial_driver *device)
{
	set_to_generic_if_null(device, open);
	set_to_generic_if_null(device, write);
	set_to_generic_if_null(device, close);
	set_to_generic_if_null(device, write_room);
	set_to_generic_if_null(device, chars_in_buffer);
	if (device->tx_empty)
		set_to_generic_if_null(device, wait_until_sent);
	set_to_generic_if_null(device, read_bulk_callback);
	set_to_generic_if_null(device, write_bulk_callback);
	set_to_generic_if_null(device, process_read_urb);
	set_to_generic_if_null(device, prepare_write_buffer);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
63
72.41%
2
33.33%
Johan Hovold
24
27.59%
4
66.67%
Total
87
100.00%
6
100.00%



static int usb_serial_register(struct usb_serial_driver *driver)
{
	int retval;

	if (usb_disabled())
		return -ENODEV;

	if (!driver->description)
		driver->description = driver->driver.name;
	if (!driver->usb_driver) {
		WARN(1, "Serial driver %s has no usb_driver\n",
				driver->description);
		return -EINVAL;
	}

	usb_serial_operations_init(driver);

	/* Add this device to our list of devices */
	mutex_lock(&table_lock);
	list_add(&driver->driver_list, &usb_serial_driver_list);

	retval = usb_serial_bus_register(driver);
	if (retval) {
		pr_err("problem %d when registering driver %s\n", retval, driver->description);
		list_del(&driver->driver_list);
	} else {
		pr_info("USB Serial support registered for %s\n", driver->description);
	}
	mutex_unlock(&table_lock);
	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Greg Kroah-Hartman
51
36.43%
8
50.00%
Alan Stern
32
22.86%
2
12.50%
Linus Torvalds (pre-git)
21
15.00%
1
6.25%
Andi Kleen
12
8.57%
1
6.25%
Dave Young
9
6.43%
1
6.25%
Luiz Fernando N. Capitulino
8
5.71%
1
6.25%
Johan Hovold
7
5.00%
2
12.50%
Total
140
100.00%
16
100.00%



static void usb_serial_deregister(struct usb_serial_driver *device)
{
	pr_info("USB Serial deregistering driver %s\n", device->description);

	mutex_lock(&table_lock);
	list_del(&device->driver_list);
	mutex_unlock(&table_lock);

	usb_serial_bus_deregister(device);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
23
51.11%
1
12.50%
Andi Kleen
12
26.67%
1
12.50%
Johan Hovold
5
11.11%
1
12.50%
Greg Kroah-Hartman
5
11.11%
5
62.50%
Total
45
100.00%
8
100.00%

/**
 * usb_serial_register_drivers - register drivers for a usb-serial module
 * @serial_drivers: NULL-terminated array of pointers to drivers to be registered
 * @name: name of the usb_driver for this set of @serial_drivers
 * @id_table: list of all devices this @serial_drivers set binds to
 *
 * Registers all the drivers in the @serial_drivers array, and dynamically
 * creates a struct usb_driver with the name @name and id_table of @id_table.
 */


int usb_serial_register_drivers(struct usb_serial_driver *const serial_drivers[],
				const char *name,
				const struct usb_device_id *id_table)
{
	int rc;
	struct usb_driver *udriver;
	struct usb_serial_driver * const *sd;

	/*
         * udriver must be registered before any of the serial drivers,
         * because the store_new_id() routine for the serial drivers (in
         * bus.c) probes udriver.
         *
         * Performance hack: We don't want udriver to be probed until
         * the serial drivers are registered, because the probe would
         * simply fail for lack of a matching serial driver.
         * So we leave udriver's id_table set to NULL until we are all set.
         *
         * Suspend/resume support is implemented in the usb-serial core,
         * so fill in the PM-related fields in udriver.
         */
	udriver = kzalloc(sizeof(*udriver), GFP_KERNEL);
	if (!udriver)
		return -ENOMEM;

	udriver->name = name;
	udriver->no_dynamic_id = 1;
	udriver->supports_autosuspend = 1;
	udriver->suspend = usb_serial_suspend;
	udriver->resume = usb_serial_resume;
	udriver->probe = usb_serial_probe;
	udriver->disconnect = usb_serial_disconnect;

	/* we only set the reset_resume field if the serial_driver has one */
	for (sd = serial_drivers; *sd; ++sd) {
		if ((*sd)->reset_resume) {
			udriver->reset_resume = usb_serial_reset_resume;
			break;
		}
	}

	rc = usb_register(udriver);
	if (rc)
		goto failed_usb_register;

	for (sd = serial_drivers; *sd; ++sd) {
		(*sd)->usb_driver = udriver;
		rc = usb_serial_register(*sd);
		if (rc)
			goto failed;
	}

	/* Now set udriver's id_table and look for matches */
	udriver->id_table = id_table;
	rc = driver_attach(&udriver->drvwrap.driver);
	return 0;

 failed:
	while (sd-- > serial_drivers)
		usb_serial_deregister(*sd);
	usb_deregister(udriver);
failed_usb_register:
	kfree(udriver);
	return rc;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
148
61.67%
2
25.00%
Greg Kroah-Hartman
82
34.17%
5
62.50%
Alexey Klimov
10
4.17%
1
12.50%
Total
240
100.00%
8
100.00%

EXPORT_SYMBOL_GPL(usb_serial_register_drivers);

/**
 * usb_serial_deregister_drivers - deregister drivers for a usb-serial module
 * @serial_drivers: NULL-terminated array of pointers to drivers to be deregistered
 *
 * Deregisters all the drivers in the @serial_drivers array and deregisters and
 * frees the struct usb_driver that was created by the call to
 * usb_serial_register_drivers().
 */


void usb_serial_deregister_drivers(struct usb_serial_driver *const serial_drivers[])
{
	struct usb_driver *udriver = (*serial_drivers)->usb_driver;

	for (; *serial_drivers; ++serial_drivers)
		usb_serial_deregister(*serial_drivers);
	usb_deregister(udriver);
	kfree(udriver);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Stern
31
63.27%
1
33.33%
Greg Kroah-Hartman
17
34.69%
1
33.33%
Linus Torvalds (pre-git)
1
2.04%
1
33.33%
Total
49
100.00%
3
100.00%

EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Johan Hovold
2203
32.37%
45
19.74%
Greg Kroah-Hartman
1608
23.63%
57
25.00%
Linus Torvalds (pre-git)
757
11.12%
12
5.26%
Alan Stern
714
10.49%
19
8.33%
Alan Cox
467
6.86%
19
8.33%
Oliver Neukum
268
3.94%
14
6.14%
Lonnie Mendez
91
1.34%
2
0.88%
Alexey Dobriyan
90
1.32%
1
0.44%
Luiz Fernando N. Capitulino
88
1.29%
8
3.51%
Al Viro
85
1.25%
1
0.44%
Linus Torvalds
48
0.71%
9
3.95%
Edwin Olson
41
0.60%
1
0.44%
Andi Kleen
38
0.56%
1
0.44%
Guennadi Liakhovetski
35
0.51%
1
0.44%
Jiri Slaby
33
0.48%
4
1.75%
Pete Zaitcev
29
0.43%
2
0.88%
Lei Ming
26
0.38%
2
0.88%
Björn Mork
24
0.35%
1
0.44%
Rusty Russell
21
0.31%
1
0.44%
Ganesh Varadarajan
20
0.29%
1
0.44%
Harvey Harrison
15
0.22%
1
0.44%
Dave Young
13
0.19%
2
0.88%
David VomLehn
13
0.19%
1
0.44%
David Howells
12
0.18%
1
0.44%
Sarah Sharp
10
0.15%
1
0.44%
Alexey Klimov
10
0.15%
1
0.44%
Matthias Urlichs
6
0.09%
1
0.44%
Johannes Thumshirn
6
0.09%
1
0.44%
Stuart MacDonald
5
0.07%
2
0.88%
Jim Radford
5
0.07%
1
0.44%
Kay Sievers
5
0.07%
2
0.88%
Al Borchers
4
0.06%
1
0.44%
Adrian Bunk
4
0.06%
2
0.88%
Eric Sesterhenn / Snakebyte
2
0.03%
1
0.44%
Stefani Seibold
2
0.03%
2
0.88%
Catalin(ux aka Dino) M. Boie
2
0.03%
1
0.44%
James Woodcock
1
0.01%
1
0.44%
Ming Lei
1
0.01%
1
0.44%
Jeff Dike
1
0.01%
1
0.44%
Peter Hurley
1
0.01%
1
0.44%
Steven Cole
1
0.01%
1
0.44%
Aristeu Sergio Rozanski Filho
1
0.01%
1
0.44%
Total
6806
100.00%
228
100.00%
Directory: drivers/usb/serial

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