1133 lines
31 KiB
C
1133 lines
31 KiB
C
/*
|
|
* USB Serial Converter driver
|
|
*
|
|
* Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com)
|
|
* Copyright (C) 2000 Peter Berger (pberger@brimson.com)
|
|
* Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*
|
|
* 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
|
|
*
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#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/spinlock.h>
|
|
#include <linux/list.h>
|
|
#include <linux/smp_lock.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/usb.h>
|
|
#include "usb-serial.h"
|
|
#include "pl2303.h"
|
|
|
|
/*
|
|
* Version Information
|
|
*/
|
|
#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/"
|
|
#define DRIVER_DESC "USB Serial Driver core"
|
|
|
|
/* Driver structure we register with the USB core */
|
|
static struct usb_driver usb_serial_driver = {
|
|
.name = "usbserial",
|
|
.probe = usb_serial_probe,
|
|
.disconnect = usb_serial_disconnect,
|
|
.no_dynamic_id = 1,
|
|
};
|
|
|
|
/* 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 int debug;
|
|
static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */
|
|
static LIST_HEAD(usb_serial_driver_list);
|
|
|
|
struct usb_serial *usb_serial_get_by_index(unsigned index)
|
|
{
|
|
struct usb_serial *serial = serial_table[index];
|
|
|
|
if (serial)
|
|
kref_get(&serial->kref);
|
|
return serial;
|
|
}
|
|
|
|
static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor)
|
|
{
|
|
unsigned int i, j;
|
|
int good_spot;
|
|
|
|
dbg("%s %d", __FUNCTION__, num_ports);
|
|
|
|
*minor = 0;
|
|
for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
|
|
if (serial_table[i])
|
|
continue;
|
|
|
|
good_spot = 1;
|
|
for (j = 1; j <= num_ports-1; ++j)
|
|
if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) {
|
|
good_spot = 0;
|
|
i += j;
|
|
break;
|
|
}
|
|
if (good_spot == 0)
|
|
continue;
|
|
|
|
*minor = i;
|
|
dbg("%s - minor base = %d", __FUNCTION__, *minor);
|
|
for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i)
|
|
serial_table[i] = serial;
|
|
return serial;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void return_serial(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
if (serial == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
serial_table[serial->minor + i] = NULL;
|
|
}
|
|
}
|
|
|
|
static void destroy_serial(struct kref *kref)
|
|
{
|
|
struct usb_serial *serial;
|
|
struct usb_serial_port *port;
|
|
int i;
|
|
|
|
serial = to_usb_serial(kref);
|
|
|
|
dbg("%s - %s", __FUNCTION__, serial->type->description);
|
|
|
|
serial->type->shutdown(serial);
|
|
|
|
/* return the minor range that this device had */
|
|
return_serial(serial);
|
|
|
|
for (i = 0; i < serial->num_ports; ++i)
|
|
serial->port[i]->open_count = 0;
|
|
|
|
/* the ports are cleaned up and released in port_release() */
|
|
for (i = 0; i < serial->num_ports; ++i)
|
|
if (serial->port[i]->dev.parent != NULL) {
|
|
device_unregister(&serial->port[i]->dev);
|
|
serial->port[i] = NULL;
|
|
}
|
|
|
|
/* If this is a "fake" port, we have to clean it up here, as it will
|
|
* not get cleaned up in port_release() as it was never registered with
|
|
* the driver core */
|
|
if (serial->num_ports < serial->num_port_pointers) {
|
|
for (i = serial->num_ports; i < serial->num_port_pointers; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
usb_kill_urb(port->read_urb);
|
|
usb_free_urb(port->read_urb);
|
|
usb_kill_urb(port->write_urb);
|
|
usb_free_urb(port->write_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
usb_free_urb(port->interrupt_in_urb);
|
|
usb_kill_urb(port->interrupt_out_urb);
|
|
usb_free_urb(port->interrupt_out_urb);
|
|
kfree(port->bulk_in_buffer);
|
|
kfree(port->bulk_out_buffer);
|
|
kfree(port->interrupt_in_buffer);
|
|
kfree(port->interrupt_out_buffer);
|
|
}
|
|
}
|
|
|
|
usb_put_dev(serial->dev);
|
|
|
|
/* free up any memory that we allocated */
|
|
kfree (serial);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Driver tty interface functions
|
|
*****************************************************************************/
|
|
static int serial_open (struct tty_struct *tty, struct file * filp)
|
|
{
|
|
struct usb_serial *serial;
|
|
struct usb_serial_port *port;
|
|
unsigned int portNumber;
|
|
int retval;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
/* get the serial object associated with this tty pointer */
|
|
serial = usb_serial_get_by_index(tty->index);
|
|
if (!serial) {
|
|
tty->driver_data = NULL;
|
|
return -ENODEV;
|
|
}
|
|
|
|
portNumber = tty->index - serial->minor;
|
|
port = serial->port[portNumber];
|
|
|
|
++port->open_count;
|
|
|
|
if (port->open_count == 1) {
|
|
|
|
/* set up our port structure making the tty driver
|
|
* remember our port object, and us it */
|
|
tty->driver_data = port;
|
|
port->tty = tty;
|
|
|
|
/* lock this module before we call it
|
|
* this may fail, which means we must bail out,
|
|
* safe because we are called with BKL held */
|
|
if (!try_module_get(serial->type->driver.owner)) {
|
|
retval = -ENODEV;
|
|
goto bailout_kref_put;
|
|
}
|
|
|
|
/* only call the device specific open if this
|
|
* is the first time the port is opened */
|
|
retval = serial->type->open(port, filp);
|
|
if (retval)
|
|
goto bailout_module_put;
|
|
}
|
|
|
|
return 0;
|
|
|
|
bailout_module_put:
|
|
module_put(serial->type->driver.owner);
|
|
bailout_kref_put:
|
|
kref_put(&serial->kref, destroy_serial);
|
|
port->open_count = 0;
|
|
return retval;
|
|
}
|
|
|
|
static void serial_close(struct tty_struct *tty, struct file * filp)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
if (!port)
|
|
return;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (port->open_count == 0)
|
|
return;
|
|
|
|
--port->open_count;
|
|
if (port->open_count == 0) {
|
|
/* only call the device specific close if this
|
|
* port is being closed by the last owner */
|
|
port->serial->type->close(port, filp);
|
|
|
|
if (port->tty) {
|
|
if (port->tty->driver_data)
|
|
port->tty->driver_data = NULL;
|
|
port->tty = NULL;
|
|
}
|
|
|
|
module_put(port->serial->type->driver.owner);
|
|
}
|
|
|
|
kref_put(&port->serial->kref, destroy_serial);
|
|
}
|
|
|
|
static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int retval = -EINVAL;
|
|
|
|
dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not opened", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
retval = port->serial->type->write(port, buf, count);
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static int serial_write_room (struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int retval = -EINVAL;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
retval = port->serial->type->write_room(port);
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static int serial_chars_in_buffer (struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int retval = -EINVAL;
|
|
|
|
dbg("%s = port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
retval = port->serial->type->chars_in_buffer(port);
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static void serial_throttle (struct tty_struct * tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg ("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
if (port->serial->type->throttle)
|
|
port->serial->type->throttle(port);
|
|
}
|
|
|
|
static void serial_unthrottle (struct tty_struct * tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
if (port->serial->type->unthrottle)
|
|
port->serial->type->unthrottle(port);
|
|
}
|
|
|
|
static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int retval = -ENODEV;
|
|
|
|
dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
|
|
|
|
if (!port->open_count) {
|
|
dbg ("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function if it is available */
|
|
if (port->serial->type->ioctl)
|
|
retval = port->serial->type->ioctl(port, file, cmd, arg);
|
|
else
|
|
retval = -ENOIOCTLCMD;
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static void serial_set_termios (struct tty_struct *tty, struct termios * old)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function if it is available */
|
|
if (port->serial->type->set_termios)
|
|
port->serial->type->set_termios(port, old);
|
|
}
|
|
|
|
static void serial_break (struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function if it is available */
|
|
if (port->serial->type->break_ctl)
|
|
port->serial->type->break_ctl(port, break_state);
|
|
}
|
|
|
|
static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
|
|
{
|
|
struct usb_serial *serial;
|
|
int length = 0;
|
|
int i;
|
|
off_t begin = 0;
|
|
char tmp[40];
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
length += sprintf (page, "usbserinfo:1.0 driver:2.0\n");
|
|
for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
|
|
serial = usb_serial_get_by_index(i);
|
|
if (serial == NULL)
|
|
continue;
|
|
|
|
length += sprintf (page+length, "%d:", i);
|
|
if (serial->type->driver.owner)
|
|
length += sprintf (page+length, " module:%s", module_name(serial->type->driver.owner));
|
|
length += sprintf (page+length, " name:\"%s\"", serial->type->description);
|
|
length += sprintf (page+length, " vendor:%04x product:%04x",
|
|
le16_to_cpu(serial->dev->descriptor.idVendor),
|
|
le16_to_cpu(serial->dev->descriptor.idProduct));
|
|
length += sprintf (page+length, " num_ports:%d", serial->num_ports);
|
|
length += sprintf (page+length, " port:%d", i - serial->minor + 1);
|
|
|
|
usb_make_path(serial->dev, tmp, sizeof(tmp));
|
|
length += sprintf (page+length, " path:%s", tmp);
|
|
|
|
length += sprintf (page+length, "\n");
|
|
if ((length + begin) > (off + count))
|
|
goto done;
|
|
if ((length + begin) < off) {
|
|
begin += length;
|
|
length = 0;
|
|
}
|
|
kref_put(&serial->kref, destroy_serial);
|
|
}
|
|
*eof = 1;
|
|
done:
|
|
if (off >= (length + begin))
|
|
return 0;
|
|
*start = page + (off-begin);
|
|
return ((count < begin+length-off) ? count : begin+length-off);
|
|
}
|
|
|
|
static int serial_tiocmget (struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
if (port->serial->type->tiocmget)
|
|
return port->serial->type->tiocmget(port, file);
|
|
|
|
exit:
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int serial_tiocmset (struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
if (port->serial->type->tiocmset)
|
|
return port->serial->type->tiocmset(port, file, set, clear);
|
|
|
|
exit:
|
|
return -EINVAL;
|
|
}
|
|
|
|
void usb_serial_port_softint(void *private)
|
|
{
|
|
struct usb_serial_port *port = private;
|
|
struct tty_struct *tty;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port)
|
|
return;
|
|
|
|
tty = port->tty;
|
|
if (!tty)
|
|
return;
|
|
|
|
tty_wakeup(tty);
|
|
}
|
|
|
|
static void port_release(struct device *dev)
|
|
{
|
|
struct usb_serial_port *port = to_usb_serial_port(dev);
|
|
|
|
dbg ("%s - %s", __FUNCTION__, dev->bus_id);
|
|
usb_kill_urb(port->read_urb);
|
|
usb_free_urb(port->read_urb);
|
|
usb_kill_urb(port->write_urb);
|
|
usb_free_urb(port->write_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
usb_free_urb(port->interrupt_in_urb);
|
|
usb_kill_urb(port->interrupt_out_urb);
|
|
usb_free_urb(port->interrupt_out_urb);
|
|
kfree(port->bulk_in_buffer);
|
|
kfree(port->bulk_out_buffer);
|
|
kfree(port->interrupt_in_buffer);
|
|
kfree(port->interrupt_out_buffer);
|
|
kfree(port);
|
|
}
|
|
|
|
static struct usb_serial * create_serial (struct usb_device *dev,
|
|
struct usb_interface *interface,
|
|
struct usb_serial_driver *driver)
|
|
{
|
|
struct usb_serial *serial;
|
|
|
|
serial = kmalloc (sizeof (*serial), GFP_KERNEL);
|
|
if (!serial) {
|
|
dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
|
|
return NULL;
|
|
}
|
|
memset (serial, 0, sizeof(*serial));
|
|
serial->dev = usb_get_dev(dev);
|
|
serial->type = driver;
|
|
serial->interface = interface;
|
|
kref_init(&serial->kref);
|
|
|
|
return serial;
|
|
}
|
|
|
|
static struct usb_serial_driver *search_serial_device(struct usb_interface *iface)
|
|
{
|
|
struct list_head *p;
|
|
const struct usb_device_id *id;
|
|
struct usb_serial_driver *t;
|
|
|
|
/* List trough know devices and see if the usb id matches */
|
|
list_for_each(p, &usb_serial_driver_list) {
|
|
t = list_entry(p, struct usb_serial_driver, driver_list);
|
|
id = usb_match_id(iface, t->id_table);
|
|
if (id != NULL) {
|
|
dbg("descriptor matches");
|
|
return t;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int usb_serial_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *dev = interface_to_usbdev (interface);
|
|
struct usb_serial *serial = NULL;
|
|
struct usb_serial_port *port;
|
|
struct usb_host_interface *iface_desc;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
|
|
struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS];
|
|
struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
|
|
struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
|
|
struct usb_serial_driver *type = NULL;
|
|
int retval;
|
|
int minor;
|
|
int buffer_size;
|
|
int i;
|
|
int num_interrupt_in = 0;
|
|
int num_interrupt_out = 0;
|
|
int num_bulk_in = 0;
|
|
int num_bulk_out = 0;
|
|
int num_ports = 0;
|
|
int max_endpoints;
|
|
|
|
type = search_serial_device(interface);
|
|
if (!type) {
|
|
dbg("none matched");
|
|
return -ENODEV;
|
|
}
|
|
|
|
serial = create_serial (dev, interface, type);
|
|
if (!serial) {
|
|
dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* if this device type has a probe function, call it */
|
|
if (type->probe) {
|
|
const struct usb_device_id *id;
|
|
|
|
if (!try_module_get(type->driver.owner)) {
|
|
dev_err(&interface->dev, "module get failed, exiting\n");
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
|
|
id = usb_match_id(interface, type->id_table);
|
|
retval = type->probe(serial, id);
|
|
module_put(type->driver.owner);
|
|
|
|
if (retval) {
|
|
dbg ("sub driver rejected device");
|
|
kfree (serial);
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
/* descriptor matches, let's find the endpoints needed */
|
|
/* check out the endpoints */
|
|
iface_desc = interface->cur_altsetting;
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
|
|
if ((endpoint->bEndpointAddress & 0x80) &&
|
|
((endpoint->bmAttributes & 3) == 0x02)) {
|
|
/* we found a bulk in endpoint */
|
|
dbg("found bulk in on endpoint %d", i);
|
|
bulk_in_endpoint[num_bulk_in] = endpoint;
|
|
++num_bulk_in;
|
|
}
|
|
|
|
if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
|
|
((endpoint->bmAttributes & 3) == 0x02)) {
|
|
/* we found a bulk out endpoint */
|
|
dbg("found bulk out on endpoint %d", i);
|
|
bulk_out_endpoint[num_bulk_out] = endpoint;
|
|
++num_bulk_out;
|
|
}
|
|
|
|
if ((endpoint->bEndpointAddress & 0x80) &&
|
|
((endpoint->bmAttributes & 3) == 0x03)) {
|
|
/* we found a interrupt in endpoint */
|
|
dbg("found interrupt in on endpoint %d", i);
|
|
interrupt_in_endpoint[num_interrupt_in] = endpoint;
|
|
++num_interrupt_in;
|
|
}
|
|
|
|
if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
|
|
((endpoint->bmAttributes & 3) == 0x03)) {
|
|
/* we found an interrupt out endpoint */
|
|
dbg("found interrupt out on endpoint %d", i);
|
|
interrupt_out_endpoint[num_interrupt_out] = endpoint;
|
|
++num_interrupt_out;
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE)
|
|
/* BEGIN HORRIBLE HACK FOR PL2303 */
|
|
/* this is needed due to the looney way its endpoints are set up */
|
|
if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) &&
|
|
(le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) ||
|
|
((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) &&
|
|
(le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID))) {
|
|
if (interface != dev->actconfig->interface[0]) {
|
|
/* check out the endpoints of the other interface*/
|
|
iface_desc = dev->actconfig->interface[0]->cur_altsetting;
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
if ((endpoint->bEndpointAddress & 0x80) &&
|
|
((endpoint->bmAttributes & 3) == 0x03)) {
|
|
/* we found a interrupt in endpoint */
|
|
dbg("found interrupt in for Prolific device on separate interface");
|
|
interrupt_in_endpoint[num_interrupt_in] = endpoint;
|
|
++num_interrupt_in;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now make sure the PL-2303 is configured correctly.
|
|
* If not, give up now and hope this hack will work
|
|
* properly during a later invocation of usb_serial_probe
|
|
*/
|
|
if (num_bulk_in == 0 || num_bulk_out == 0) {
|
|
dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n");
|
|
kfree (serial);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
/* END HORRIBLE HACK FOR PL2303 */
|
|
#endif
|
|
|
|
/* found all that we need */
|
|
dev_info(&interface->dev, "%s converter detected\n", type->description);
|
|
|
|
#ifdef CONFIG_USB_SERIAL_GENERIC
|
|
if (type == &usb_serial_generic_device) {
|
|
num_ports = num_bulk_out;
|
|
if (num_ports == 0) {
|
|
dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n");
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
}
|
|
#endif
|
|
if (!num_ports) {
|
|
/* if this device type has a calc_num_ports function, call it */
|
|
if (type->calc_num_ports) {
|
|
if (!try_module_get(type->driver.owner)) {
|
|
dev_err(&interface->dev, "module get failed, exiting\n");
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
num_ports = type->calc_num_ports (serial);
|
|
module_put(type->driver.owner);
|
|
}
|
|
if (!num_ports)
|
|
num_ports = type->num_ports;
|
|
}
|
|
|
|
if (get_free_serial (serial, num_ports, &minor) == NULL) {
|
|
dev_err(&interface->dev, "No more free serial devices\n");
|
|
kfree (serial);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
serial->minor = minor;
|
|
serial->num_ports = num_ports;
|
|
serial->num_bulk_in = num_bulk_in;
|
|
serial->num_bulk_out = num_bulk_out;
|
|
serial->num_interrupt_in = num_interrupt_in;
|
|
serial->num_interrupt_out = num_interrupt_out;
|
|
|
|
/* create our ports, we need as many as the max endpoints */
|
|
/* we don't use num_ports here cauz some devices have more endpoint pairs than ports */
|
|
max_endpoints = max(num_bulk_in, num_bulk_out);
|
|
max_endpoints = max(max_endpoints, num_interrupt_in);
|
|
max_endpoints = max(max_endpoints, num_interrupt_out);
|
|
max_endpoints = max(max_endpoints, (int)serial->num_ports);
|
|
serial->num_port_pointers = max_endpoints;
|
|
dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints);
|
|
for (i = 0; i < max_endpoints; ++i) {
|
|
port = kmalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
|
|
if (!port)
|
|
goto probe_error;
|
|
memset(port, 0x00, sizeof(struct usb_serial_port));
|
|
port->number = i + serial->minor;
|
|
port->serial = serial;
|
|
spin_lock_init(&port->lock);
|
|
INIT_WORK(&port->work, usb_serial_port_softint, port);
|
|
serial->port[i] = port;
|
|
}
|
|
|
|
/* set up the endpoint information */
|
|
for (i = 0; i < num_bulk_in; ++i) {
|
|
endpoint = bulk_in_endpoint[i];
|
|
port = serial->port[i];
|
|
port->read_urb = usb_alloc_urb (0, GFP_KERNEL);
|
|
if (!port->read_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->bulk_in_size = buffer_size;
|
|
port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
|
|
port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->bulk_in_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_bulk_urb (port->read_urb, dev,
|
|
usb_rcvbulkpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->bulk_in_buffer, buffer_size,
|
|
serial->type->read_bulk_callback,
|
|
port);
|
|
}
|
|
|
|
for (i = 0; i < num_bulk_out; ++i) {
|
|
endpoint = bulk_out_endpoint[i];
|
|
port = serial->port[i];
|
|
port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port->write_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->bulk_out_size = buffer_size;
|
|
port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
|
|
port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->bulk_out_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_bulk_urb (port->write_urb, dev,
|
|
usb_sndbulkpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->bulk_out_buffer, buffer_size,
|
|
serial->type->write_bulk_callback,
|
|
port);
|
|
}
|
|
|
|
if (serial->type->read_int_callback) {
|
|
for (i = 0; i < num_interrupt_in; ++i) {
|
|
endpoint = interrupt_in_endpoint[i];
|
|
port = serial->port[i];
|
|
port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port->interrupt_in_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->interrupt_in_endpointAddress = endpoint->bEndpointAddress;
|
|
port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->interrupt_in_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_int_urb (port->interrupt_in_urb, dev,
|
|
usb_rcvintpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->interrupt_in_buffer, buffer_size,
|
|
serial->type->read_int_callback, port,
|
|
endpoint->bInterval);
|
|
}
|
|
} else if (num_interrupt_in) {
|
|
dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined");
|
|
}
|
|
|
|
if (serial->type->write_int_callback) {
|
|
for (i = 0; i < num_interrupt_out; ++i) {
|
|
endpoint = interrupt_out_endpoint[i];
|
|
port = serial->port[i];
|
|
port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port->interrupt_out_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->interrupt_out_size = buffer_size;
|
|
port->interrupt_out_endpointAddress = endpoint->bEndpointAddress;
|
|
port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->interrupt_out_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_int_urb (port->interrupt_out_urb, dev,
|
|
usb_sndintpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->interrupt_out_buffer, buffer_size,
|
|
serial->type->write_int_callback, port,
|
|
endpoint->bInterval);
|
|
}
|
|
} else if (num_interrupt_out) {
|
|
dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined");
|
|
}
|
|
|
|
/* if this device type has an attach function, call it */
|
|
if (type->attach) {
|
|
if (!try_module_get(type->driver.owner)) {
|
|
dev_err(&interface->dev, "module get failed, exiting\n");
|
|
goto probe_error;
|
|
}
|
|
retval = type->attach (serial);
|
|
module_put(type->driver.owner);
|
|
if (retval < 0)
|
|
goto probe_error;
|
|
if (retval > 0) {
|
|
/* quietly accept this device, but don't bind to a serial port
|
|
* as it's about to disappear */
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
/* register all of the individual ports with the driver core */
|
|
for (i = 0; i < num_ports; ++i) {
|
|
port = serial->port[i];
|
|
port->dev.parent = &interface->dev;
|
|
port->dev.driver = NULL;
|
|
port->dev.bus = &usb_serial_bus_type;
|
|
port->dev.release = &port_release;
|
|
|
|
snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number);
|
|
dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id);
|
|
device_register (&port->dev);
|
|
}
|
|
|
|
usb_serial_console_init (debug, minor);
|
|
|
|
exit:
|
|
/* success */
|
|
usb_set_intfdata (interface, serial);
|
|
return 0;
|
|
|
|
probe_error:
|
|
for (i = 0; i < num_bulk_in; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->read_urb)
|
|
usb_free_urb (port->read_urb);
|
|
kfree(port->bulk_in_buffer);
|
|
}
|
|
for (i = 0; i < num_bulk_out; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->write_urb)
|
|
usb_free_urb (port->write_urb);
|
|
kfree(port->bulk_out_buffer);
|
|
}
|
|
for (i = 0; i < num_interrupt_in; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->interrupt_in_urb)
|
|
usb_free_urb (port->interrupt_in_urb);
|
|
kfree(port->interrupt_in_buffer);
|
|
}
|
|
for (i = 0; i < num_interrupt_out; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->interrupt_out_urb)
|
|
usb_free_urb (port->interrupt_out_urb);
|
|
kfree(port->interrupt_out_buffer);
|
|
}
|
|
|
|
/* return the minor range that this device had */
|
|
return_serial (serial);
|
|
|
|
/* free up any memory that we allocated */
|
|
for (i = 0; i < serial->num_port_pointers; ++i)
|
|
kfree(serial->port[i]);
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
|
|
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;
|
|
|
|
dbg ("%s", __FUNCTION__);
|
|
|
|
usb_set_intfdata (interface, NULL);
|
|
if (serial) {
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
port = serial->port[i];
|
|
if (port && port->tty)
|
|
tty_hangup(port->tty);
|
|
}
|
|
/* let the last holder of this object
|
|
* cause it to be cleaned up */
|
|
kref_put(&serial->kref, destroy_serial);
|
|
}
|
|
dev_info(dev, "device disconnected\n");
|
|
}
|
|
|
|
static struct tty_operations serial_ops = {
|
|
.open = serial_open,
|
|
.close = serial_close,
|
|
.write = serial_write,
|
|
.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,
|
|
.read_proc = serial_read_proc,
|
|
.tiocmget = serial_tiocmget,
|
|
.tiocmset = serial_tiocmset,
|
|
};
|
|
|
|
struct tty_driver *usb_serial_tty_driver;
|
|
|
|
static int __init usb_serial_init(void)
|
|
{
|
|
int i;
|
|
int result;
|
|
|
|
usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS);
|
|
if (!usb_serial_tty_driver)
|
|
return -ENOMEM;
|
|
|
|
/* Initialize our global data */
|
|
for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
|
|
serial_table[i] = NULL;
|
|
}
|
|
|
|
result = bus_register(&usb_serial_bus_type);
|
|
if (result) {
|
|
err("%s - registering bus driver failed", __FUNCTION__);
|
|
goto exit_bus;
|
|
}
|
|
|
|
usb_serial_tty_driver->owner = THIS_MODULE;
|
|
usb_serial_tty_driver->driver_name = "usbserial";
|
|
usb_serial_tty_driver->devfs_name = "usb/tts/";
|
|
usb_serial_tty_driver->name = "ttyUSB";
|
|
usb_serial_tty_driver->major = 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_NO_DEVFS;
|
|
usb_serial_tty_driver->init_termios = tty_std_termios;
|
|
usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
|
tty_set_operations(usb_serial_tty_driver, &serial_ops);
|
|
result = tty_register_driver(usb_serial_tty_driver);
|
|
if (result) {
|
|
err("%s - tty_register_driver failed", __FUNCTION__);
|
|
goto exit_reg_driver;
|
|
}
|
|
|
|
/* register the USB driver */
|
|
result = usb_register(&usb_serial_driver);
|
|
if (result < 0) {
|
|
err("%s - usb_register failed", __FUNCTION__);
|
|
goto exit_tty;
|
|
}
|
|
|
|
/* register the generic driver, if we should */
|
|
result = usb_serial_generic_register(debug);
|
|
if (result < 0) {
|
|
err("%s - registering generic driver failed", __FUNCTION__);
|
|
goto exit_generic;
|
|
}
|
|
|
|
info(DRIVER_DESC);
|
|
|
|
return result;
|
|
|
|
exit_generic:
|
|
usb_deregister(&usb_serial_driver);
|
|
|
|
exit_tty:
|
|
tty_unregister_driver(usb_serial_tty_driver);
|
|
|
|
exit_reg_driver:
|
|
bus_unregister(&usb_serial_bus_type);
|
|
|
|
exit_bus:
|
|
err ("%s - returning with error %d", __FUNCTION__, result);
|
|
put_tty_driver(usb_serial_tty_driver);
|
|
return result;
|
|
}
|
|
|
|
|
|
static void __exit usb_serial_exit(void)
|
|
{
|
|
usb_serial_console_exit();
|
|
|
|
usb_serial_generic_deregister();
|
|
|
|
usb_deregister(&usb_serial_driver);
|
|
tty_unregister_driver(usb_serial_tty_driver);
|
|
put_tty_driver(usb_serial_tty_driver);
|
|
bus_unregister(&usb_serial_bus_type);
|
|
}
|
|
|
|
|
|
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; \
|
|
dbg("Had to override the " #function \
|
|
" usb serial operation with the generic one.");\
|
|
} \
|
|
} while (0)
|
|
|
|
static void fixup_generic(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);
|
|
set_to_generic_if_null(device, read_bulk_callback);
|
|
set_to_generic_if_null(device, write_bulk_callback);
|
|
set_to_generic_if_null(device, shutdown);
|
|
}
|
|
|
|
int usb_serial_register(struct usb_serial_driver *driver)
|
|
{
|
|
int retval;
|
|
|
|
fixup_generic(driver);
|
|
|
|
if (!driver->description)
|
|
driver->description = driver->driver.name;
|
|
|
|
/* Add this device to our list of devices */
|
|
list_add(&driver->driver_list, &usb_serial_driver_list);
|
|
|
|
retval = usb_serial_bus_register(driver);
|
|
if (retval) {
|
|
err("problem %d when registering driver %s", retval, driver->description);
|
|
list_del(&driver->driver_list);
|
|
}
|
|
else
|
|
info("USB Serial support registered for %s", driver->description);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
void usb_serial_deregister(struct usb_serial_driver *device)
|
|
{
|
|
info("USB Serial deregistering driver %s", device->description);
|
|
list_del(&device->driver_list);
|
|
usb_serial_bus_deregister(device);
|
|
}
|
|
|
|
|
|
|
|
/* If the usb-serial core is built into the core, the usb-serial drivers
|
|
need these symbols to load properly as modules. */
|
|
EXPORT_SYMBOL_GPL(usb_serial_register);
|
|
EXPORT_SYMBOL_GPL(usb_serial_deregister);
|
|
EXPORT_SYMBOL_GPL(usb_serial_probe);
|
|
EXPORT_SYMBOL_GPL(usb_serial_disconnect);
|
|
EXPORT_SYMBOL_GPL(usb_serial_port_softint);
|
|
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR( DRIVER_AUTHOR );
|
|
MODULE_DESCRIPTION( DRIVER_DESC );
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|