1,1476 → 1,1477 |
/* |
* USB Serial Converter driver |
* |
* Copyright (C) 1999 - 2003 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 |
* |
* (12/10/2002) gkh |
* Split the ports off into their own struct device, and added a |
* usb-serial bus driver. |
* |
* (11/19/2002) gkh |
* removed a few #ifdefs for the generic code and cleaned up the failure |
* logic in initialization. |
* |
* (10/02/2002) gkh |
* moved the console code to console.c and out of this file. |
* |
* (06/05/2002) gkh |
* moved location of startup() call in serial_probe() until after all |
* of the port information and endpoints are initialized. This makes |
* things easier for some drivers. |
* |
* (04/10/2002) gkh |
* added serial_read_proc function which creates a |
* /proc/tty/driver/usb-serial file. |
* |
* (03/27/2002) gkh |
* Got USB serial console code working properly and merged into the main |
* version of the tree. Thanks to Randy Dunlap for the initial version |
* of this code, and for pushing me to finish it up. |
* The USB serial console works with any usb serial driver device. |
* |
* (03/21/2002) gkh |
* Moved all manipulation of port->open_count into the core. Now the |
* individual driver's open and close functions are called only when the |
* first open() and last close() is called. Making the drivers a bit |
* smaller and simpler. |
* Fixed a bug if a driver didn't have the owner field set. |
* |
* (02/26/2002) gkh |
* Moved all locking into the main serial_* functions, instead of having |
* the individual drivers have to grab the port semaphore. This should |
* reduce races. |
* Reworked the MOD_INC logic a bit to always increment and decrement, even |
* if the generic driver is being used. |
* |
* (10/10/2001) gkh |
* usb_serial_disconnect() now sets the serial->dev pointer is to NULL to |
* help prevent child drivers from accessing the device since it is now |
* gone. |
* |
* (09/13/2001) gkh |
* Moved generic driver initialize after we have registered with the USB |
* core. Thanks to Randy Dunlap for pointing this problem out. |
* |
* (07/03/2001) gkh |
* Fixed module paramater size. Thanks to John Brockmeyer for the pointer. |
* Fixed vendor and product getting defined through the MODULE_PARM macro |
* if the Generic driver wasn't compiled in. |
* Fixed problem with generic_shutdown() not being called for drivers that |
* don't have a shutdown() function. |
* |
* (06/06/2001) gkh |
* added evil hack that is needed for the prolific pl2303 device due to the |
* crazy way its endpoints are set up. |
* |
* (05/30/2001) gkh |
* switched from using spinlock to a semaphore, which fixes lots of problems. |
* |
* (04/08/2001) gb |
* Identify version on module load. |
* |
* 2001_02_05 gkh |
* Fixed buffer overflows bug with the generic serial driver. Thanks to |
* Todd Squires <squirest@ct0.com> for fixing this. |
* |
* (01/10/2001) gkh |
* Fixed bug where the generic serial adaptor grabbed _any_ device that was |
* offered to it. |
* |
* (12/12/2000) gkh |
* Removed MOD_INC and MOD_DEC from poll and disconnect functions, and |
* moved them to the serial_open and serial_close functions. |
* Also fixed bug with there not being a MOD_DEC for the generic driver |
* (thanks to Gary Brubaker for finding this.) |
* |
* (11/29/2000) gkh |
* Small NULL pointer initialization cleanup which saves a bit of disk image |
* |
* (11/01/2000) Adam J. Richter |
* instead of using idVendor/idProduct pairs, usb serial drivers |
* now identify their hardware interest with usb_device_id tables, |
* which they usually have anyhow for use with MODULE_DEVICE_TABLE. |
* |
* (10/05/2000) gkh |
* Fixed bug with urb->dev not being set properly, now that the usb |
* core needs it. |
* |
* (09/11/2000) gkh |
* Removed DEBUG #ifdefs with call to usb_serial_debug_data |
* |
* (08/28/2000) gkh |
* Added port_lock to port structure. |
* Added locks for SMP safeness to generic driver |
* Fixed the ability to open a generic device's port more than once. |
* |
* (07/23/2000) gkh |
* Added bulk_out_endpointAddress to port structure. |
* |
* (07/19/2000) gkh, pberger, and borchers |
* Modifications to allow usb-serial drivers to be modules. |
* |
* (07/03/2000) gkh |
* Added more debugging to serial_ioctl call |
* |
* (06/25/2000) gkh |
* Changed generic_write_bulk_callback to not call wake_up_interruptible |
* directly, but to have port_softint do it at a safer time. |
* |
* (06/23/2000) gkh |
* Cleaned up debugging statements in a quest to find UHCI timeout bug. |
* |
* (05/22/2000) gkh |
* Changed the makefile, enabling the big CONFIG_USB_SERIAL_SOMTHING to be |
* removed from the individual device source files. |
* |
* (05/03/2000) gkh |
* Added the Digi Acceleport driver from Al Borchers and Peter Berger. |
* |
* (05/02/2000) gkh |
* Changed devfs and tty register code to work properly now. This was based on |
* the ACM driver changes by Vojtech Pavlik. |
* |
* (04/27/2000) Ryan VanderBijl |
* Put calls to *_paranoia_checks into one function. |
* |
* (04/23/2000) gkh |
* Fixed bug that Randy Dunlap found for Generic devices with no bulk out ports. |
* Moved when the startup code printed out the devices that are supported. |
* |
* (04/19/2000) gkh |
* Added driver for ZyXEL omni.net lcd plus ISDN TA |
* Made startup info message specify which drivers were compiled in. |
* |
* (04/03/2000) gkh |
* Changed the probe process to remove the module unload races. |
* Changed where the tty layer gets initialized to have devfs work nicer. |
* Added initial devfs support. |
* |
* (03/26/2000) gkh |
* Split driver up into device specific pieces. |
* |
* (03/19/2000) gkh |
* Fixed oops that could happen when device was removed while a program |
* was talking to the device. |
* Removed the static urbs and now all urbs are created and destroyed |
* dynamically. |
* Reworked the internal interface. Now everything is based on the |
* usb_serial_port structure instead of the larger usb_serial structure. |
* This fixes the bug that a multiport device could not have more than |
* one port open at one time. |
* |
* (03/17/2000) gkh |
* Added config option for debugging messages. |
* Added patch for keyspan pda from Brian Warner. |
* |
* (03/06/2000) gkh |
* Added the keyspan pda code from Brian Warner <warner@lothar.com> |
* Moved a bunch of the port specific stuff into its own structure. This |
* is in anticipation of the true multiport devices (there's a bug if you |
* try to access more than one port of any multiport device right now) |
* |
* (02/21/2000) gkh |
* Made it so that any serial devices only have to specify which functions |
* they want to overload from the generic function calls (great, |
* inheritance in C, in a driver, just what I wanted...) |
* Added support for set_termios and ioctl function calls. No drivers take |
* advantage of this yet. |
* Removed the #ifdef MODULE, now there is no module specific code. |
* Cleaned up a few comments in usb-serial.h that were wrong (thanks again |
* to Miles Lott). |
* Small fix to get_free_serial. |
* |
* (02/14/2000) gkh |
* Removed the Belkin and Peracom functionality from the driver due to |
* the lack of support from the vendor, and me not wanting people to |
* accidenatly buy the device, expecting it to work with Linux. |
* Added read_bulk_callback and write_bulk_callback to the type structure |
* for the needs of the FTDI and WhiteHEAT driver. |
* Changed all reverences to FTDI to FTDI_SIO at the request of Bill |
* Ryder. |
* Changed the output urb size back to the max endpoint size to make |
* the ftdi_sio driver have it easier, and due to the fact that it didn't |
* really increase the speed any. |
* |
* (02/11/2000) gkh |
* Added VISOR_FUNCTION_CONSOLE to the visor startup function. This was a |
* patch from Miles Lott (milos@insync.net). |
* Fixed bug with not restoring the minor range that a device grabs, if |
* the startup function fails (thanks Miles for finding this). |
* |
* (02/05/2000) gkh |
* Added initial framework for the Keyspan PDA serial converter so that |
* Brian Warner has a place to put his code. |
* Made the ezusb specific functions generic enough that different |
* devices can use them (whiteheat and keyspan_pda both need them). |
* Split out a whole bunch of structure and other stuff to a separate |
* usb-serial.h file. |
* Made the Visor connection messages a little more understandable, now |
* that Miles Lott (milos@insync.net) has gotten the Generic channel to |
* work. Also made them always show up in the log file. |
* |
* (01/25/2000) gkh |
* Added initial framework for FTDI serial converter so that Bill Ryder |
* has a place to put his code. |
* Added the vendor specific info from Handspring. Now we can print out |
* informational debug messages as well as understand what is happening. |
* |
* (01/23/2000) gkh |
* Fixed problem of crash when trying to open a port that didn't have a |
* device assigned to it. Made the minor node finding a little smarter, |
* now it looks to find a continuous space for the new device. |
* |
* (01/21/2000) gkh |
* Fixed bug in visor_startup with patch from Miles Lott (milos@insync.net) |
* Fixed get_serial_by_minor which was all messed up for multi port |
* devices. Fixed multi port problem for generic devices. Now the number |
* of ports is determined by the number of bulk out endpoints for the |
* generic device. |
* |
* (01/19/2000) gkh |
* Removed lots of cruft that was around from the old (pre urb) driver |
* interface. |
* Made the serial_table dynamic. This should save lots of memory when |
* the number of minor nodes goes up to 256. |
* Added initial support for devices that have more than one port. |
* Added more debugging comments for the Visor, and added a needed |
* set_configuration call. |
* |
* (01/17/2000) gkh |
* Fixed the WhiteHEAT firmware (my processing tool had a bug) |
* and added new debug loader firmware for it. |
* Removed the put_char function as it isn't really needed. |
* Added visor startup commands as found by the Win98 dump. |
* |
* (01/13/2000) gkh |
* Fixed the vendor id for the generic driver to the one I meant it to be. |
* |
* (01/12/2000) gkh |
* Forget the version numbering...that's pretty useless... |
* Made the driver able to be compiled so that the user can select which |
* converter they want to use. This allows people who only want the Visor |
* support to not pay the memory size price of the WhiteHEAT. |
* Fixed bug where the generic driver (idVendor=0000 and idProduct=0000) |
* grabbed the root hub. Not good. |
* |
* version 0.4.0 (01/10/2000) gkh |
* Added whiteheat.h containing the firmware for the ConnectTech WhiteHEAT |
* device. Added startup function to allow firmware to be downloaded to |
* a device if it needs to be. |
* Added firmware download logic to the WhiteHEAT device. |
* Started to add #defines to split up the different drivers for potential |
* configuration option. |
* |
* version 0.3.1 (12/30/99) gkh |
* Fixed problems with urb for bulk out. |
* Added initial support for multiple sets of endpoints. This enables |
* the Handspring Visor to be attached successfully. Only the first |
* bulk in / bulk out endpoint pair is being used right now. |
* |
* version 0.3.0 (12/27/99) gkh |
* Added initial support for the Handspring Visor based on a patch from |
* Miles Lott (milos@sneety.insync.net) |
* Cleaned up the code a bunch and converted over to using urbs only. |
* |
* version 0.2.3 (12/21/99) gkh |
* Added initial support for the Connect Tech WhiteHEAT converter. |
* Incremented the number of ports in expectation of getting the |
* WhiteHEAT to work properly (4 ports per connection). |
* Added notification on insertion and removal of what port the |
* device is/was connected to (and what kind of device it was). |
* |
* version 0.2.2 (12/16/99) gkh |
* Changed major number to the new allocated number. We're legal now! |
* |
* version 0.2.1 (12/14/99) gkh |
* Fixed bug that happens when device node is opened when there isn't a |
* device attached to it. Thanks to marek@webdesign.no for noticing this. |
* |
* version 0.2.0 (11/10/99) gkh |
* Split up internals to make it easier to add different types of serial |
* converters to the code. |
* Added a "generic" driver that gets it's vendor and product id |
* from when the module is loaded. Thanks to David E. Nelson (dnelson@jump.net) |
* for the idea and sample code (from the usb scanner driver.) |
* Cleared up any licensing questions by releasing it under the GNU GPL. |
* |
* version 0.1.2 (10/25/99) gkh |
* Fixed bug in detecting device. |
* |
* version 0.1.1 (10/05/99) gkh |
* Changed the major number to not conflict with anything else. |
* |
* version 0.1 (09/28/99) gkh |
* Can recognize the two different devices and start up a read from |
* device when asked to. Writes also work. No control signals yet, this |
* all is vendor specific data (i.e. no spec), also no control for |
* different baud rates or other bit settings. |
* Currently we are using the same devid as the acm driver. This needs |
* to change. |
* |
*/ |
|
#include <linuxcomp.h> |
|
#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/spinlock.h> |
#include <linux/list.h> |
#include <linux/smp_lock.h> |
#include <asm/uaccess.h> |
#include <linux/usb.h> |
|
|
#ifdef CONFIG_USB_SERIAL_DEBUG |
static int debug = 1; |
#else |
static int debug; |
#endif |
|
#include "usb-serial.h" |
#include "pl2303.h" |
|
/* |
* Version Information |
*/ |
#define DRIVER_VERSION "v2.0" |
#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
#define DRIVER_DESC "USB Serial Driver core" |
|
|
#ifdef CONFIG_USB_SERIAL_GENERIC |
/* we want to look at all devices, as the vendor/product id can change |
* depending on the command line argument */ |
static struct usb_device_id generic_serial_ids[] = { |
{.driver_info = 42}, |
{} |
}; |
|
#endif /* CONFIG_USB_SERIAL_GENERIC */ |
|
/* Driver structure we register with the USB core */ |
static struct usb_driver usb_serial_driver = { |
.owner = THIS_MODULE, |
.name = "usbserial", |
.probe = usb_serial_probe, |
.disconnect = usb_serial_disconnect, |
#ifdef CONFIG_USB_SERIAL_GENERIC |
.id_table = generic_serial_ids, |
#endif |
}; |
|
/* 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 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) |
kobject_get (&serial->kobj); |
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 ((serial_table[i+j]) || (i+j >= SERIAL_TTY_MINORS)) { |
good_spot = 0; |
i += j; |
break; |
} |
if (good_spot == 0) |
continue; |
|
serial->magic = USB_SERIAL_MAGIC; |
*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; |
} |
|
return; |
} |
|
/***************************************************************************** |
* 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 = 0; |
|
dbg("%s", __FUNCTION__); |
|
/* initialize the pointer incase something fails */ |
tty->driver_data = NULL; |
|
/* get the serial object associated with this tty pointer */ |
serial = usb_serial_get_by_index(tty->index); |
|
if (serial_paranoia_check (serial, __FUNCTION__)) |
return -ENODEV; |
|
/* set up our port structure making the tty driver remember our port object, and us it */ |
portNumber = tty->index - serial->minor; |
port = serial->port[portNumber]; |
tty->driver_data = port; |
|
port->tty = tty; |
|
/* lock this module before we call it, |
this may, which means we must bail out, safe because we are called with BKL held */ |
if (!try_module_get(serial->type->owner)) { |
retval = -ENODEV; |
goto bailout; |
} |
|
++port->open_count; |
if (port->open_count == 1) { |
/* only call the device specific open if this |
* is the first time the port is opened */ |
retval = serial->type->open(port, filp); |
if (retval) { |
port->open_count = 0; |
module_put(serial->type->owner); |
kobject_put(&serial->kobj); |
} |
} |
bailout: |
return retval; |
} |
|
static void serial_close(struct tty_struct *tty, struct file * filp) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
--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); |
port->open_count = 0; |
|
if (port->tty) { |
if (port->tty->driver_data) |
port->tty->driver_data = NULL; |
port->tty = NULL; |
} |
} |
|
module_put(port->serial->type->owner); |
kobject_put(&port->serial->kobj); |
} |
|
/*static*/ int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -EINVAL; |
|
if (!serial) |
return -ENODEV; |
|
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 = serial->type->write(port, from_user, buf, count); |
|
exit: |
return retval; |
} |
|
static int serial_write_room (struct tty_struct *tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -EINVAL; |
|
if (!serial) |
return -ENODEV; |
|
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 = serial->type->write_room(port); |
|
exit: |
return retval; |
} |
|
static int serial_chars_in_buffer (struct tty_struct *tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -EINVAL; |
|
if (!serial) |
return -ENODEV; |
|
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 = serial->type->chars_in_buffer(port); |
|
exit: |
return retval; |
} |
|
static void serial_throttle (struct tty_struct * tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 */ |
if (serial->type->throttle) |
serial->type->throttle(port); |
|
exit: |
; |
} |
|
static void serial_unthrottle (struct tty_struct * tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 */ |
if (serial->type->unthrottle) |
serial->type->unthrottle(port); |
|
exit: |
; |
} |
|
static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -ENODEV; |
|
if (!serial) |
return -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 (serial->type->ioctl) |
retval = 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 = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 if it is available */ |
if (serial->type->set_termios) |
serial->type->set_termios(port, old); |
|
exit: |
; |
} |
|
static void serial_break (struct tty_struct *tty, int break_state) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 if it is available */ |
if (serial->type->break_ctl) |
serial->type->break_ctl(port, break_state); |
|
exit: |
; |
} |
|
static void serial_shutdown (struct usb_serial *serial) |
{ |
dbg ("%s", __FUNCTION__); |
|
serial->type->shutdown(serial); |
} |
|
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 += sprintf26 (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION); |
for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
serial = usb_serial_get_by_index(i); |
if (serial == NULL) |
continue; |
|
length += sprintf26 (page+length, "%d:", i); |
if (serial->type->owner) |
length += sprintf26 (page+length, " module:%s", module_name(serial->type->owner)); |
length += sprintf26 (page+length, " name:\"%s\"", serial->type->name); |
length += sprintf26 (page+length, " vendor:%04x product:%04x", serial->vendor, serial->product); |
length += sprintf26 (page+length, " num_ports:%d", serial->num_ports); |
length += sprintf26 (page+length, " port:%d", i - serial->minor + 1); |
|
usb_make_path(serial->dev, tmp, sizeof(tmp)); |
length += sprintf26 (page+length, " path:%s", tmp); |
|
length += sprintf26 (page+length, "\n"); |
if ((length + begin) > (off + count)) |
goto done; |
if ((length + begin) < off) { |
begin += length; |
length = 0; |
} |
kobject_put(&serial->kobj); |
} |
*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 = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
goto exit; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!port->open_count) { |
dbg("%s - port not open", __FUNCTION__); |
goto exit; |
} |
|
if (serial->type->tiocmget) |
return 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 = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
goto exit; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!port->open_count) { |
dbg("%s - port not open", __FUNCTION__); |
goto exit; |
} |
|
if (serial->type->tiocmset) |
return serial->type->tiocmset(port, file, set, clear); |
|
exit: |
return -EINVAL; |
} |
|
void usb_serial_port_softint(void *private) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *)private; |
struct usb_serial *serial; |
struct tty_struct *tty; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!port) |
return; |
|
serial = get_usb_serial (port, __FUNCTION__); |
if (!serial) |
return; |
|
tty = port->tty; |
if (!tty) |
return; |
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) { |
dbg("%s - write wakeup call.", __FUNCTION__); |
(tty->ldisc.write_wakeup)(tty); |
} |
|
wake_up_interruptible(&tty->write_wait); |
} |
|
static void destroy_serial (struct kobject *kobj) |
{ |
struct usb_serial *serial; |
struct usb_serial_port *port; |
int i; |
|
dbg ("%s - %s", __FUNCTION__, kobj->name); |
|
serial = to_usb_serial(kobj); |
serial_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; |
if (port->read_urb) { |
usb_unlink_urb(port->read_urb); |
usb_free_urb(port->read_urb); |
} |
if (port->write_urb) { |
usb_unlink_urb(port->write_urb); |
usb_free_urb(port->write_urb); |
} |
if (port->interrupt_in_urb) { |
usb_unlink_urb(port->interrupt_in_urb); |
usb_free_urb(port->interrupt_in_urb); |
} |
kfree(port->bulk_in_buffer); |
kfree(port->bulk_out_buffer); |
kfree(port->interrupt_in_buffer); |
} |
} |
|
usb_put_dev(serial->dev); |
|
/* free up any memory that we allocated */ |
kfree (serial); |
} |
|
static struct kobj_type usb_serial_kobj_type = { |
.release = destroy_serial, |
}; |
|
static void port_release(struct device *dev) |
{ |
struct usb_serial_port *port = to_usb_serial_port(dev); |
|
dbg ("%s - %s", __FUNCTION__, dev->bus_id); |
if (port->read_urb) { |
usb_unlink_urb(port->read_urb); |
usb_free_urb(port->read_urb); |
} |
if (port->write_urb) { |
usb_unlink_urb(port->write_urb); |
usb_free_urb(port->write_urb); |
} |
if (port->interrupt_in_urb) { |
usb_unlink_urb(port->interrupt_in_urb); |
usb_free_urb(port->interrupt_in_urb); |
} |
kfree(port->bulk_in_buffer); |
kfree(port->bulk_out_buffer); |
kfree(port->interrupt_in_buffer); |
kfree(port); |
} |
|
static struct usb_serial * create_serial (struct usb_device *dev, |
struct usb_interface *interface, |
struct usb_serial_device_type *type) |
{ |
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 = type; |
serial->interface = interface; |
serial->vendor = dev->descriptor.idVendor; |
serial->product = dev->descriptor.idProduct; |
|
/* initialize the kobject portion of the usb_device */ |
kobject_init(&serial->kobj); |
serial->kobj.ktype = &usb_serial_kobj_type; |
|
return serial; |
} |
|
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 *bulk_in_endpoint[MAX_NUM_PORTS]; |
struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; |
struct usb_serial_device_type *type = NULL; |
struct list_head *tmp; |
int retval; |
int found; |
int minor; |
int buffer_size; |
int i; |
int num_interrupt_in = 0; |
int num_bulk_in = 0; |
int num_bulk_out = 0; |
int num_ports = 0; |
int max_endpoints; |
const struct usb_device_id *id_pattern = NULL; |
|
/* loop through our list of known serial converters, and see if this |
device matches. */ |
found = 0; |
list_for_each (tmp, &usb_serial_driver_list) { |
type = list_entry(tmp, struct usb_serial_device_type, driver_list); |
id_pattern = usb_match_id(interface, type->id_table); |
if (id_pattern != NULL) { |
dbg("descriptor matches"); |
found = 1; |
break; |
} |
} |
if (!found) { |
/* no match */ |
dbg("none matched"); |
return -ENODEV; |
} |
serial = create_serial (dev, interface, type); |
if (!serial) { |
dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); |
return -ENODEV; |
} |
|
/* if this device type has a probe function, call it */ |
if (type->probe) { |
if (!try_module_get(type->owner)) { |
dev_err(&interface->dev, "module get failed, exiting\n"); |
kfree (serial); |
return -EIO; |
} |
retval = type->probe (serial, id_pattern); |
module_put(type->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->altsetting[0]; |
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"); |
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"); |
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"); |
interrupt_in_endpoint[num_interrupt_in] = endpoint; |
++num_interrupt_in; |
} |
} |
|
#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 (((dev->descriptor.idVendor == PL2303_VENDOR_ID) && |
(dev->descriptor.idProduct == PL2303_PRODUCT_ID)) || |
((dev->descriptor.idVendor == ATEN_VENDOR_ID) && |
(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]->altsetting[0]; |
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->name); |
|
#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->owner)) { |
dev_err(&interface->dev, "module get failed, exiting\n"); |
kfree (serial); |
return -EIO; |
} |
num_ports = type->calc_num_ports (serial); |
module_put(type->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; |
|
/* 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, (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; |
port->magic = USB_SERIAL_PORT_MAGIC; |
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 = endpoint->wMaxPacketSize; |
|
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 = 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); |
} |
|
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 = 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); |
} |
|
/* if this device type has an attach function, call it */ |
if (type->attach) { |
if (!try_module_get(type->owner)) { |
dev_err(&interface->dev, "module get failed, exiting\n"); |
goto probe_error; |
} |
retval = type->attach (serial); |
module_put(type->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; |
|
snprintf26(&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); |
} |
|
/* 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) |
{ |
struct usb_serial *serial = usb_get_intfdata (interface); |
struct device *dev = &interface->dev; |
|
dbg ("%s", __FUNCTION__); |
|
usb_set_intfdata (interface, NULL); |
if (serial) { |
/* let the last holder of this object |
* cause it to be cleaned up */ |
kobject_put (&serial->kobj); |
} |
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 = 0; |
|
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; |
} |
|
bus_register(&usb_serial_bus_type); |
|
/* 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; |
} |
|
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_generic; |
} |
|
/* register the USB driver */ |
result = usb_register(&usb_serial_driver); |
if (result < 0) { |
err("%s - usb_register failed", __FUNCTION__); |
goto exit_tty; |
} |
|
info(DRIVER_DESC " " DRIVER_VERSION); |
|
return result; |
|
exit_tty: |
tty_unregister_driver(usb_serial_tty_driver); |
|
exit_generic: |
usb_serial_generic_deregister(); |
|
exit: |
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_device_type *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_device_type *new_device) |
{ |
int retval; |
|
fixup_generic(new_device); |
|
/* Add this device to our list of devices */ |
list_add(&new_device->driver_list, &usb_serial_driver_list); |
|
retval = usb_serial_bus_register (new_device); |
|
if (retval) |
goto error; |
|
info("USB Serial support registered for %s", new_device->name); |
|
return retval; |
error: |
err("problem %d when registering driver %s", retval, new_device->name); |
list_del(&new_device->driver_list); |
|
return retval; |
} |
|
|
void usb_serial_deregister(struct usb_serial_device_type *device) |
{ |
struct usb_serial *serial; |
int i; |
|
info("USB Serial deregistering driver %s", device->name); |
|
/* clear out the serial_table if the device is attached to a port */ |
for(i = 0; i < SERIAL_TTY_MINORS; ++i) { |
serial = serial_table[i]; |
if ((serial != NULL) && (serial->type == device)) { |
usb_driver_release_interface (&usb_serial_driver, serial->interface); |
usb_serial_disconnect (serial->interface); |
} |
} |
|
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(usb_serial_register); |
EXPORT_SYMBOL(usb_serial_deregister); |
EXPORT_SYMBOL(usb_serial_probe); |
EXPORT_SYMBOL(usb_serial_disconnect); |
EXPORT_SYMBOL(usb_serial_port_softint); |
|
|
/* Module information */ |
MODULE_AUTHOR( DRIVER_AUTHOR ); |
MODULE_DESCRIPTION( DRIVER_DESC ); |
MODULE_LICENSE("GPL"); |
|
MODULE_PARM(debug, "i"); |
MODULE_PARM_DESC(debug, "Debug enabled or not"); |
/* |
* USB Serial Converter driver |
* |
* Copyright (C) 1999 - 2003 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 |
* |
* (12/10/2002) gkh |
* Split the ports off into their own struct device, and added a |
* usb-serial bus driver. |
* |
* (11/19/2002) gkh |
* removed a few #ifdefs for the generic code and cleaned up the failure |
* logic in initialization. |
* |
* (10/02/2002) gkh |
* moved the console code to console.c and out of this file. |
* |
* (06/05/2002) gkh |
* moved location of startup() call in serial_probe() until after all |
* of the port information and endpoints are initialized. This makes |
* things easier for some drivers. |
* |
* (04/10/2002) gkh |
* added serial_read_proc function which creates a |
* /proc/tty/driver/usb-serial file. |
* |
* (03/27/2002) gkh |
* Got USB serial console code working properly and merged into the main |
* version of the tree. Thanks to Randy Dunlap for the initial version |
* of this code, and for pushing me to finish it up. |
* The USB serial console works with any usb serial driver device. |
* |
* (03/21/2002) gkh |
* Moved all manipulation of port->open_count into the core. Now the |
* individual driver's open and close functions are called only when the |
* first open() and last close() is called. Making the drivers a bit |
* smaller and simpler. |
* Fixed a bug if a driver didn't have the owner field set. |
* |
* (02/26/2002) gkh |
* Moved all locking into the main serial_* functions, instead of having |
* the individual drivers have to grab the port semaphore. This should |
* reduce races. |
* Reworked the MOD_INC logic a bit to always increment and decrement, even |
* if the generic driver is being used. |
* |
* (10/10/2001) gkh |
* usb_serial_disconnect() now sets the serial->dev pointer is to NULL to |
* help prevent child drivers from accessing the device since it is now |
* gone. |
* |
* (09/13/2001) gkh |
* Moved generic driver initialize after we have registered with the USB |
* core. Thanks to Randy Dunlap for pointing this problem out. |
* |
* (07/03/2001) gkh |
* Fixed module paramater size. Thanks to John Brockmeyer for the pointer. |
* Fixed vendor and product getting defined through the MODULE_PARM macro |
* if the Generic driver wasn't compiled in. |
* Fixed problem with generic_shutdown() not being called for drivers that |
* don't have a shutdown() function. |
* |
* (06/06/2001) gkh |
* added evil hack that is needed for the prolific pl2303 device due to the |
* crazy way its endpoints are set up. |
* |
* (05/30/2001) gkh |
* switched from using spinlock to a semaphore, which fixes lots of problems. |
* |
* (04/08/2001) gb |
* Identify version on module load. |
* |
* 2001_02_05 gkh |
* Fixed buffer overflows bug with the generic serial driver. Thanks to |
* Todd Squires <squirest@ct0.com> for fixing this. |
* |
* (01/10/2001) gkh |
* Fixed bug where the generic serial adaptor grabbed _any_ device that was |
* offered to it. |
* |
* (12/12/2000) gkh |
* Removed MOD_INC and MOD_DEC from poll and disconnect functions, and |
* moved them to the serial_open and serial_close functions. |
* Also fixed bug with there not being a MOD_DEC for the generic driver |
* (thanks to Gary Brubaker for finding this.) |
* |
* (11/29/2000) gkh |
* Small NULL pointer initialization cleanup which saves a bit of disk image |
* |
* (11/01/2000) Adam J. Richter |
* instead of using idVendor/idProduct pairs, usb serial drivers |
* now identify their hardware interest with usb_device_id tables, |
* which they usually have anyhow for use with MODULE_DEVICE_TABLE. |
* |
* (10/05/2000) gkh |
* Fixed bug with urb->dev not being set properly, now that the usb |
* core needs it. |
* |
* (09/11/2000) gkh |
* Removed DEBUG #ifdefs with call to usb_serial_debug_data |
* |
* (08/28/2000) gkh |
* Added port_lock to port structure. |
* Added locks for SMP safeness to generic driver |
* Fixed the ability to open a generic device's port more than once. |
* |
* (07/23/2000) gkh |
* Added bulk_out_endpointAddress to port structure. |
* |
* (07/19/2000) gkh, pberger, and borchers |
* Modifications to allow usb-serial drivers to be modules. |
* |
* (07/03/2000) gkh |
* Added more debugging to serial_ioctl call |
* |
* (06/25/2000) gkh |
* Changed generic_write_bulk_callback to not call wake_up_interruptible |
* directly, but to have port_softint do it at a safer time. |
* |
* (06/23/2000) gkh |
* Cleaned up debugging statements in a quest to find UHCI timeout bug. |
* |
* (05/22/2000) gkh |
* Changed the makefile, enabling the big CONFIG_USB_SERIAL_SOMTHING to be |
* removed from the individual device source files. |
* |
* (05/03/2000) gkh |
* Added the Digi Acceleport driver from Al Borchers and Peter Berger. |
* |
* (05/02/2000) gkh |
* Changed devfs and tty register code to work properly now. This was based on |
* the ACM driver changes by Vojtech Pavlik. |
* |
* (04/27/2000) Ryan VanderBijl |
* Put calls to *_paranoia_checks into one function. |
* |
* (04/23/2000) gkh |
* Fixed bug that Randy Dunlap found for Generic devices with no bulk out ports. |
* Moved when the startup code printed out the devices that are supported. |
* |
* (04/19/2000) gkh |
* Added driver for ZyXEL omni.net lcd plus ISDN TA |
* Made startup info message specify which drivers were compiled in. |
* |
* (04/03/2000) gkh |
* Changed the probe process to remove the module unload races. |
* Changed where the tty layer gets initialized to have devfs work nicer. |
* Added initial devfs support. |
* |
* (03/26/2000) gkh |
* Split driver up into device specific pieces. |
* |
* (03/19/2000) gkh |
* Fixed oops that could happen when device was removed while a program |
* was talking to the device. |
* Removed the static urbs and now all urbs are created and destroyed |
* dynamically. |
* Reworked the internal interface. Now everything is based on the |
* usb_serial_port structure instead of the larger usb_serial structure. |
* This fixes the bug that a multiport device could not have more than |
* one port open at one time. |
* |
* (03/17/2000) gkh |
* Added config option for debugging messages. |
* Added patch for keyspan pda from Brian Warner. |
* |
* (03/06/2000) gkh |
* Added the keyspan pda code from Brian Warner <warner@lothar.com> |
* Moved a bunch of the port specific stuff into its own structure. This |
* is in anticipation of the true multiport devices (there's a bug if you |
* try to access more than one port of any multiport device right now) |
* |
* (02/21/2000) gkh |
* Made it so that any serial devices only have to specify which functions |
* they want to overload from the generic function calls (great, |
* inheritance in C, in a driver, just what I wanted...) |
* Added support for set_termios and ioctl function calls. No drivers take |
* advantage of this yet. |
* Removed the #ifdef MODULE, now there is no module specific code. |
* Cleaned up a few comments in usb-serial.h that were wrong (thanks again |
* to Miles Lott). |
* Small fix to get_free_serial. |
* |
* (02/14/2000) gkh |
* Removed the Belkin and Peracom functionality from the driver due to |
* the lack of support from the vendor, and me not wanting people to |
* accidenatly buy the device, expecting it to work with Linux. |
* Added read_bulk_callback and write_bulk_callback to the type structure |
* for the needs of the FTDI and WhiteHEAT driver. |
* Changed all reverences to FTDI to FTDI_SIO at the request of Bill |
* Ryder. |
* Changed the output urb size back to the max endpoint size to make |
* the ftdi_sio driver have it easier, and due to the fact that it didn't |
* really increase the speed any. |
* |
* (02/11/2000) gkh |
* Added VISOR_FUNCTION_CONSOLE to the visor startup function. This was a |
* patch from Miles Lott (milos@insync.net). |
* Fixed bug with not restoring the minor range that a device grabs, if |
* the startup function fails (thanks Miles for finding this). |
* |
* (02/05/2000) gkh |
* Added initial framework for the Keyspan PDA serial converter so that |
* Brian Warner has a place to put his code. |
* Made the ezusb specific functions generic enough that different |
* devices can use them (whiteheat and keyspan_pda both need them). |
* Split out a whole bunch of structure and other stuff to a separate |
* usb-serial.h file. |
* Made the Visor connection messages a little more understandable, now |
* that Miles Lott (milos@insync.net) has gotten the Generic channel to |
* work. Also made them always show up in the log file. |
* |
* (01/25/2000) gkh |
* Added initial framework for FTDI serial converter so that Bill Ryder |
* has a place to put his code. |
* Added the vendor specific info from Handspring. Now we can print out |
* informational debug messages as well as understand what is happening. |
* |
* (01/23/2000) gkh |
* Fixed problem of crash when trying to open a port that didn't have a |
* device assigned to it. Made the minor node finding a little smarter, |
* now it looks to find a continuous space for the new device. |
* |
* (01/21/2000) gkh |
* Fixed bug in visor_startup with patch from Miles Lott (milos@insync.net) |
* Fixed get_serial_by_minor which was all messed up for multi port |
* devices. Fixed multi port problem for generic devices. Now the number |
* of ports is determined by the number of bulk out endpoints for the |
* generic device. |
* |
* (01/19/2000) gkh |
* Removed lots of cruft that was around from the old (pre urb) driver |
* interface. |
* Made the serial_table dynamic. This should save lots of memory when |
* the number of minor nodes goes up to 256. |
* Added initial support for devices that have more than one port. |
* Added more debugging comments for the Visor, and added a needed |
* set_configuration call. |
* |
* (01/17/2000) gkh |
* Fixed the WhiteHEAT firmware (my processing tool had a bug) |
* and added new debug loader firmware for it. |
* Removed the put_char function as it isn't really needed. |
* Added visor startup commands as found by the Win98 dump. |
* |
* (01/13/2000) gkh |
* Fixed the vendor id for the generic driver to the one I meant it to be. |
* |
* (01/12/2000) gkh |
* Forget the version numbering...that's pretty useless... |
* Made the driver able to be compiled so that the user can select which |
* converter they want to use. This allows people who only want the Visor |
* support to not pay the memory size price of the WhiteHEAT. |
* Fixed bug where the generic driver (idVendor=0000 and idProduct=0000) |
* grabbed the root hub. Not good. |
* |
* version 0.4.0 (01/10/2000) gkh |
* Added whiteheat.h containing the firmware for the ConnectTech WhiteHEAT |
* device. Added startup function to allow firmware to be downloaded to |
* a device if it needs to be. |
* Added firmware download logic to the WhiteHEAT device. |
* Started to add #defines to split up the different drivers for potential |
* configuration option. |
* |
* version 0.3.1 (12/30/99) gkh |
* Fixed problems with urb for bulk out. |
* Added initial support for multiple sets of endpoints. This enables |
* the Handspring Visor to be attached successfully. Only the first |
* bulk in / bulk out endpoint pair is being used right now. |
* |
* version 0.3.0 (12/27/99) gkh |
* Added initial support for the Handspring Visor based on a patch from |
* Miles Lott (milos@sneety.insync.net) |
* Cleaned up the code a bunch and converted over to using urbs only. |
* |
* version 0.2.3 (12/21/99) gkh |
* Added initial support for the Connect Tech WhiteHEAT converter. |
* Incremented the number of ports in expectation of getting the |
* WhiteHEAT to work properly (4 ports per connection). |
* Added notification on insertion and removal of what port the |
* device is/was connected to (and what kind of device it was). |
* |
* version 0.2.2 (12/16/99) gkh |
* Changed major number to the new allocated number. We're legal now! |
* |
* version 0.2.1 (12/14/99) gkh |
* Fixed bug that happens when device node is opened when there isn't a |
* device attached to it. Thanks to marek@webdesign.no for noticing this. |
* |
* version 0.2.0 (11/10/99) gkh |
* Split up internals to make it easier to add different types of serial |
* converters to the code. |
* Added a "generic" driver that gets it's vendor and product id |
* from when the module is loaded. Thanks to David E. Nelson (dnelson@jump.net) |
* for the idea and sample code (from the usb scanner driver.) |
* Cleared up any licensing questions by releasing it under the GNU GPL. |
* |
* version 0.1.2 (10/25/99) gkh |
* Fixed bug in detecting device. |
* |
* version 0.1.1 (10/05/99) gkh |
* Changed the major number to not conflict with anything else. |
* |
* version 0.1 (09/28/99) gkh |
* Can recognize the two different devices and start up a read from |
* device when asked to. Writes also work. No control signals yet, this |
* all is vendor specific data (i.e. no spec), also no control for |
* different baud rates or other bit settings. |
* Currently we are using the same devid as the acm driver. This needs |
* to change. |
* |
*/ |
|
#include <linuxcomp.h> |
|
#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/spinlock.h> |
#include <linux/list.h> |
#include <linux/smp_lock.h> |
#include <asm/uaccess.h> |
#include <linux/usb.h> |
|
|
#ifdef CONFIG_USB_SERIAL_DEBUG |
static int debug = 1; |
#else |
static int debug; |
#endif |
|
#include "usb-serial.h" |
#include "pl2303.h" |
|
/* |
* Version Information |
*/ |
#define DRIVER_VERSION "v2.0" |
#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
#define DRIVER_DESC "USB Serial Driver core" |
|
|
#ifdef CONFIG_USB_SERIAL_GENERIC |
/* we want to look at all devices, as the vendor/product id can change |
* depending on the command line argument */ |
static struct usb_device_id generic_serial_ids[] = { |
{.driver_info = 42}, |
{} |
}; |
|
#endif /* CONFIG_USB_SERIAL_GENERIC */ |
|
/* Driver structure we register with the USB core */ |
static struct usb_driver usb_serial_driver = { |
.owner = THIS_MODULE, |
.name = "usbserial", |
.probe = usb_serial_probe, |
.disconnect = usb_serial_disconnect, |
#ifdef CONFIG_USB_SERIAL_GENERIC |
.id_table = generic_serial_ids, |
#endif |
}; |
|
/* 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 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) |
kobject_get (&serial->kobj); |
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 ((serial_table[i+j]) || (i+j >= SERIAL_TTY_MINORS)) { |
good_spot = 0; |
i += j; |
break; |
} |
if (good_spot == 0) |
continue; |
|
serial->magic = USB_SERIAL_MAGIC; |
*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__); |
printk("Returning serial %d ports %d\n", serial->minor, serial->num_ports); |
|
if (serial == NULL) |
return; |
|
for (i = 0; i < serial->num_ports; ++i) { |
serial_table[serial->minor + i] = NULL; |
} |
|
return; |
} |
|
/***************************************************************************** |
* 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 = 0; |
|
dbg("%s", __FUNCTION__); |
|
/* initialize the pointer incase something fails */ |
tty->driver_data = NULL; |
|
/* get the serial object associated with this tty pointer */ |
serial = usb_serial_get_by_index(tty->index); |
|
if (serial_paranoia_check (serial, __FUNCTION__)) |
return -ENODEV; |
|
/* set up our port structure making the tty driver remember our port object, and us it */ |
portNumber = tty->index - serial->minor; |
port = serial->port[portNumber]; |
tty->driver_data = port; |
|
port->tty = tty; |
|
/* lock this module before we call it, |
this may, which means we must bail out, safe because we are called with BKL held */ |
if (!try_module_get(serial->type->owner)) { |
retval = -ENODEV; |
goto bailout; |
} |
|
++port->open_count; |
if (port->open_count == 1) { |
/* only call the device specific open if this |
* is the first time the port is opened */ |
retval = serial->type->open(port, filp); |
if (retval) { |
port->open_count = 0; |
module_put(serial->type->owner); |
kobject_put(&serial->kobj); |
} |
} |
bailout: |
return retval; |
} |
|
static void serial_close(struct tty_struct *tty, struct file * filp) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
--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); |
port->open_count = 0; |
|
if (port->tty) { |
if (port->tty->driver_data) |
port->tty->driver_data = NULL; |
port->tty = NULL; |
} |
} |
|
module_put(port->serial->type->owner); |
kobject_put(&port->serial->kobj); |
} |
|
/*static*/ int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -EINVAL; |
|
if (!serial) |
return -ENODEV; |
|
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 = serial->type->write(port, from_user, buf, count); |
|
exit: |
return retval; |
} |
|
static int serial_write_room (struct tty_struct *tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -EINVAL; |
|
if (!serial) |
return -ENODEV; |
|
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 = serial->type->write_room(port); |
|
exit: |
return retval; |
} |
|
static int serial_chars_in_buffer (struct tty_struct *tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -EINVAL; |
|
if (!serial) |
return -ENODEV; |
|
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 = serial->type->chars_in_buffer(port); |
|
exit: |
return retval; |
} |
|
static void serial_throttle (struct tty_struct * tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 */ |
if (serial->type->throttle) |
serial->type->throttle(port); |
|
exit: |
; |
} |
|
static void serial_unthrottle (struct tty_struct * tty) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 */ |
if (serial->type->unthrottle) |
serial->type->unthrottle(port); |
|
exit: |
; |
} |
|
static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
int retval = -ENODEV; |
|
if (!serial) |
return -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 (serial->type->ioctl) |
retval = 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 = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 if it is available */ |
if (serial->type->set_termios) |
serial->type->set_termios(port, old); |
|
exit: |
; |
} |
|
static void serial_break (struct tty_struct *tty, int break_state) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
return; |
|
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 if it is available */ |
if (serial->type->break_ctl) |
serial->type->break_ctl(port, break_state); |
|
exit: |
; |
} |
|
static void serial_shutdown (struct usb_serial *serial) |
{ |
dbg ("%s", __FUNCTION__); |
|
serial->type->shutdown(serial); |
} |
|
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 += sprintf26 (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION); |
for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
serial = usb_serial_get_by_index(i); |
if (serial == NULL) |
continue; |
|
length += sprintf26 (page+length, "%d:", i); |
if (serial->type->owner) |
length += sprintf26 (page+length, " module:%s", module_name(serial->type->owner)); |
length += sprintf26 (page+length, " name:\"%s\"", serial->type->name); |
length += sprintf26 (page+length, " vendor:%04x product:%04x", serial->vendor, serial->product); |
length += sprintf26 (page+length, " num_ports:%d", serial->num_ports); |
length += sprintf26 (page+length, " port:%d", i - serial->minor + 1); |
|
usb_make_path(serial->dev, tmp, sizeof(tmp)); |
length += sprintf26 (page+length, " path:%s", tmp); |
|
length += sprintf26 (page+length, "\n"); |
if ((length + begin) > (off + count)) |
goto done; |
if ((length + begin) < off) { |
begin += length; |
length = 0; |
} |
kobject_put(&serial->kobj); |
} |
*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 = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
goto exit; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!port->open_count) { |
dbg("%s - port not open", __FUNCTION__); |
goto exit; |
} |
|
if (serial->type->tiocmget) |
return 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 = (struct usb_serial_port *) tty->driver_data; |
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
|
if (!serial) |
goto exit; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!port->open_count) { |
dbg("%s - port not open", __FUNCTION__); |
goto exit; |
} |
|
if (serial->type->tiocmset) |
return serial->type->tiocmset(port, file, set, clear); |
|
exit: |
return -EINVAL; |
} |
|
void usb_serial_port_softint(void *private) |
{ |
struct usb_serial_port *port = (struct usb_serial_port *)private; |
struct usb_serial *serial; |
struct tty_struct *tty; |
|
dbg("%s - port %d", __FUNCTION__, port->number); |
|
if (!port) |
return; |
|
serial = get_usb_serial (port, __FUNCTION__); |
if (!serial) |
return; |
|
tty = port->tty; |
if (!tty) |
return; |
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) { |
dbg("%s - write wakeup call.", __FUNCTION__); |
(tty->ldisc.write_wakeup)(tty); |
} |
|
wake_up_interruptible(&tty->write_wait); |
} |
|
static void destroy_serial (struct kobject *kobj) |
{ |
struct usb_serial *serial; |
struct usb_serial_port *port; |
int i; |
|
dbg ("%s - %s", __FUNCTION__, kobj->name); |
|
serial = to_usb_serial(kobj); |
serial_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; |
if (port->read_urb) { |
usb_unlink_urb(port->read_urb); |
usb_free_urb(port->read_urb); |
} |
if (port->write_urb) { |
usb_unlink_urb(port->write_urb); |
usb_free_urb(port->write_urb); |
} |
if (port->interrupt_in_urb) { |
usb_unlink_urb(port->interrupt_in_urb); |
usb_free_urb(port->interrupt_in_urb); |
} |
kfree(port->bulk_in_buffer); |
kfree(port->bulk_out_buffer); |
kfree(port->interrupt_in_buffer); |
} |
} |
|
usb_put_dev(serial->dev); |
|
/* free up any memory that we allocated */ |
kfree (serial); |
} |
|
static struct kobj_type usb_serial_kobj_type = { |
.release = destroy_serial, |
}; |
|
static void port_release(struct device *dev) |
{ |
struct usb_serial_port *port = to_usb_serial_port(dev); |
|
dbg ("%s - %s", __FUNCTION__, dev->bus_id); |
if (port->read_urb) { |
usb_unlink_urb(port->read_urb); |
usb_free_urb(port->read_urb); |
} |
if (port->write_urb) { |
usb_unlink_urb(port->write_urb); |
usb_free_urb(port->write_urb); |
} |
if (port->interrupt_in_urb) { |
usb_unlink_urb(port->interrupt_in_urb); |
usb_free_urb(port->interrupt_in_urb); |
} |
kfree(port->bulk_in_buffer); |
kfree(port->bulk_out_buffer); |
kfree(port->interrupt_in_buffer); |
kfree(port); |
} |
|
static struct usb_serial * create_serial (struct usb_device *dev, |
struct usb_interface *interface, |
struct usb_serial_device_type *type) |
{ |
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 = type; |
serial->interface = interface; |
serial->vendor = dev->descriptor.idVendor; |
serial->product = dev->descriptor.idProduct; |
|
/* initialize the kobject portion of the usb_device */ |
kobject_init(&serial->kobj); |
serial->kobj.ktype = &usb_serial_kobj_type; |
|
return serial; |
} |
|
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 *bulk_in_endpoint[MAX_NUM_PORTS]; |
struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; |
struct usb_serial_device_type *type = NULL; |
struct list_head *tmp; |
int retval; |
int found; |
int minor; |
int buffer_size; |
int i; |
int num_interrupt_in = 0; |
int num_bulk_in = 0; |
int num_bulk_out = 0; |
int num_ports = 0; |
int max_endpoints; |
const struct usb_device_id *id_pattern = NULL; |
|
/* loop through our list of known serial converters, and see if this |
device matches. */ |
found = 0; |
list_for_each (tmp, &usb_serial_driver_list) { |
type = list_entry(tmp, struct usb_serial_device_type, driver_list); |
id_pattern = usb_match_id(interface, type->id_table); |
if (id_pattern != NULL) { |
dbg("descriptor matches"); |
found = 1; |
break; |
} |
} |
if (!found) { |
/* no match */ |
dbg("none matched"); |
return -ENODEV; |
} |
serial = create_serial (dev, interface, type); |
if (!serial) { |
dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); |
return -ENODEV; |
} |
|
/* if this device type has a probe function, call it */ |
if (type->probe) { |
if (!try_module_get(type->owner)) { |
dev_err(&interface->dev, "module get failed, exiting\n"); |
kfree (serial); |
return -EIO; |
} |
retval = type->probe (serial, id_pattern); |
module_put(type->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->altsetting[0]; |
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"); |
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"); |
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"); |
interrupt_in_endpoint[num_interrupt_in] = endpoint; |
++num_interrupt_in; |
} |
} |
|
#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 (((dev->descriptor.idVendor == PL2303_VENDOR_ID) && |
(dev->descriptor.idProduct == PL2303_PRODUCT_ID)) || |
((dev->descriptor.idVendor == ATEN_VENDOR_ID) && |
(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]->altsetting[0]; |
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->name); |
|
#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->owner)) { |
dev_err(&interface->dev, "module get failed, exiting\n"); |
kfree (serial); |
return -EIO; |
} |
num_ports = type->calc_num_ports (serial); |
module_put(type->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; |
|
/* 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, (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; |
port->magic = USB_SERIAL_PORT_MAGIC; |
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 = endpoint->wMaxPacketSize; |
|
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 = 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); |
} |
|
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 = 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); |
} |
|
/* if this device type has an attach function, call it */ |
if (type->attach) { |
if (!try_module_get(type->owner)) { |
dev_err(&interface->dev, "module get failed, exiting\n"); |
goto probe_error; |
} |
retval = type->attach (serial); |
module_put(type->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; |
|
snprintf26(&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); |
} |
|
/* 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) |
{ |
struct usb_serial *serial = usb_get_intfdata (interface); |
struct device *dev = &interface->dev; |
|
dbg ("%s", __FUNCTION__); |
|
usb_set_intfdata (interface, NULL); |
if (serial) { |
/* let the last holder of this object |
* cause it to be cleaned up */ |
kobject_put (&serial->kobj); |
} |
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 = 0; |
|
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; |
} |
|
bus_register(&usb_serial_bus_type); |
|
/* 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; |
} |
|
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 = B4800 | 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_generic; |
} |
|
/* register the USB driver */ |
result = usb_register(&usb_serial_driver); |
if (result < 0) { |
err("%s - usb_register failed", __FUNCTION__); |
goto exit_tty; |
} |
|
info(DRIVER_DESC " " DRIVER_VERSION); |
|
return result; |
|
exit_tty: |
tty_unregister_driver(usb_serial_tty_driver); |
|
exit_generic: |
usb_serial_generic_deregister(); |
|
exit: |
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_device_type *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_device_type *new_device) |
{ |
int retval; |
|
fixup_generic(new_device); |
|
/* Add this device to our list of devices */ |
list_add(&new_device->driver_list, &usb_serial_driver_list); |
|
retval = usb_serial_bus_register (new_device); |
|
if (retval) |
goto error; |
|
info("USB Serial support registered for %s", new_device->name); |
|
return retval; |
error: |
err("problem %d when registering driver %s", retval, new_device->name); |
list_del(&new_device->driver_list); |
|
return retval; |
} |
|
|
void usb_serial_deregister(struct usb_serial_device_type *device) |
{ |
struct usb_serial *serial; |
int i; |
|
info("USB Serial deregistering driver %s", device->name); |
|
/* clear out the serial_table if the device is attached to a port */ |
for(i = 0; i < SERIAL_TTY_MINORS; ++i) { |
serial = serial_table[i]; |
if ((serial != NULL) && (serial->type == device)) { |
usb_driver_release_interface (&usb_serial_driver, serial->interface); |
usb_serial_disconnect (serial->interface); |
} |
} |
|
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(usb_serial_register); |
EXPORT_SYMBOL(usb_serial_deregister); |
EXPORT_SYMBOL(usb_serial_probe); |
EXPORT_SYMBOL(usb_serial_disconnect); |
EXPORT_SYMBOL(usb_serial_port_softint); |
|
|
/* Module information */ |
MODULE_AUTHOR( DRIVER_AUTHOR ); |
MODULE_DESCRIPTION( DRIVER_DESC ); |
MODULE_LICENSE("GPL"); |
|
MODULE_PARM(debug, "i"); |
MODULE_PARM_DESC(debug, "Debug enabled or not"); |