WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/drivers/usb/serial/usb-serial.c

Rev	Author	Line No.	Line
1049	mauro	1	/*
		2	* USB Serial Converter driver
		3	*
		4	* Copyright (C) 1999 - 2003 Greg Kroah-Hartman (greg@kroah.com)
		5	* Copyright (C) 2000 Peter Berger (pberger@brimson.com)
		6	* Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com)
		7	*
		8	* This program is free software; you can redistribute it and/or
		9	* modify it under the terms of the GNU General Public License version
		10	* 2 as published by the Free Software Foundation.
		11	*
		12	* This driver was originally based on the ACM driver by Armin Fuerst (which was
		13	* based on a driver by Brad Keryan)
		14	*
		15	* See Documentation/usb/usb-serial.txt for more information on using this driver
		16	*
		17	* (12/10/2002) gkh
		18	* Split the ports off into their own struct device, and added a
		19	* usb-serial bus driver.
		20	*
		21	* (11/19/2002) gkh
		22	* removed a few #ifdefs for the generic code and cleaned up the failure
		23	* logic in initialization.
		24	*
		25	* (10/02/2002) gkh
		26	* moved the console code to console.c and out of this file.
		27	*
		28	* (06/05/2002) gkh
		29	* moved location of startup() call in serial_probe() until after all
		30	* of the port information and endpoints are initialized. This makes
		31	* things easier for some drivers.
		32	*
		33	* (04/10/2002) gkh
		34	* added serial_read_proc function which creates a
		35	* /proc/tty/driver/usb-serial file.
		36	*
		37	* (03/27/2002) gkh
		38	* Got USB serial console code working properly and merged into the main
		39	* version of the tree. Thanks to Randy Dunlap for the initial version
		40	* of this code, and for pushing me to finish it up.
		41	* The USB serial console works with any usb serial driver device.
		42	*
		43	* (03/21/2002) gkh
		44	* Moved all manipulation of port->open_count into the core. Now the
		45	* individual driver's open and close functions are called only when the
		46	* first open() and last close() is called. Making the drivers a bit
		47	* smaller and simpler.
		48	* Fixed a bug if a driver didn't have the owner field set.
		49	*
		50	* (02/26/2002) gkh
		51	* Moved all locking into the main serial_* functions, instead of having
		52	* the individual drivers have to grab the port semaphore. This should
		53	* reduce races.
		54	* Reworked the MOD_INC logic a bit to always increment and decrement, even
		55	* if the generic driver is being used.
		56	*
		57	* (10/10/2001) gkh
		58	* usb_serial_disconnect() now sets the serial->dev pointer is to NULL to
		59	* help prevent child drivers from accessing the device since it is now
		60	* gone.
		61	*
		62	* (09/13/2001) gkh
		63	* Moved generic driver initialize after we have registered with the USB
		64	* core. Thanks to Randy Dunlap for pointing this problem out.
		65	*
		66	* (07/03/2001) gkh
		67	* Fixed module paramater size. Thanks to John Brockmeyer for the pointer.
		68	* Fixed vendor and product getting defined through the MODULE_PARM macro
		69	* if the Generic driver wasn't compiled in.
		70	* Fixed problem with generic_shutdown() not being called for drivers that
		71	* don't have a shutdown() function.
		72	*
		73	* (06/06/2001) gkh
		74	* added evil hack that is needed for the prolific pl2303 device due to the
		75	* crazy way its endpoints are set up.
		76	*
		77	* (05/30/2001) gkh
		78	* switched from using spinlock to a semaphore, which fixes lots of problems.
		79	*
		80	* (04/08/2001) gb
		81	* Identify version on module load.
		82	*
		83	* 2001_02_05 gkh
		84	* Fixed buffer overflows bug with the generic serial driver. Thanks to
		85	* Todd Squires <squirest@ct0.com> for fixing this.
		86	*
		87	* (01/10/2001) gkh
		88	* Fixed bug where the generic serial adaptor grabbed _any_ device that was
		89	* offered to it.
		90	*
		91	* (12/12/2000) gkh
		92	* Removed MOD_INC and MOD_DEC from poll and disconnect functions, and
		93	* moved them to the serial_open and serial_close functions.
		94	* Also fixed bug with there not being a MOD_DEC for the generic driver
		95	* (thanks to Gary Brubaker for finding this.)
		96	*
		97	* (11/29/2000) gkh
		98	* Small NULL pointer initialization cleanup which saves a bit of disk image
		99	*
		100	* (11/01/2000) Adam J. Richter
		101	* instead of using idVendor/idProduct pairs, usb serial drivers
		102	* now identify their hardware interest with usb_device_id tables,
		103	* which they usually have anyhow for use with MODULE_DEVICE_TABLE.
		104	*
		105	* (10/05/2000) gkh
		106	* Fixed bug with urb->dev not being set properly, now that the usb
		107	* core needs it.
		108	*
		109	* (09/11/2000) gkh
		110	* Removed DEBUG #ifdefs with call to usb_serial_debug_data
		111	*
		112	* (08/28/2000) gkh
		113	* Added port_lock to port structure.
		114	* Added locks for SMP safeness to generic driver
		115	* Fixed the ability to open a generic device's port more than once.
		116	*
		117	* (07/23/2000) gkh
		118	* Added bulk_out_endpointAddress to port structure.
		119	*
		120	* (07/19/2000) gkh, pberger, and borchers
		121	* Modifications to allow usb-serial drivers to be modules.
		122	*
		123	* (07/03/2000) gkh
		124	* Added more debugging to serial_ioctl call
		125	*
		126	* (06/25/2000) gkh
		127	* Changed generic_write_bulk_callback to not call wake_up_interruptible
		128	* directly, but to have port_softint do it at a safer time.
		129	*
		130	* (06/23/2000) gkh
		131	* Cleaned up debugging statements in a quest to find UHCI timeout bug.
		132	*
		133	* (05/22/2000) gkh
		134	* Changed the makefile, enabling the big CONFIG_USB_SERIAL_SOMTHING to be
		135	* removed from the individual device source files.
		136	*
		137	* (05/03/2000) gkh
		138	* Added the Digi Acceleport driver from Al Borchers and Peter Berger.
		139	*
		140	* (05/02/2000) gkh
		141	* Changed devfs and tty register code to work properly now. This was based on
		142	* the ACM driver changes by Vojtech Pavlik.
		143	*
		144	* (04/27/2000) Ryan VanderBijl
		145	* Put calls to *_paranoia_checks into one function.
		146	*
		147	* (04/23/2000) gkh
		148	* Fixed bug that Randy Dunlap found for Generic devices with no bulk out ports.
		149	* Moved when the startup code printed out the devices that are supported.
		150	*
		151	* (04/19/2000) gkh
		152	* Added driver for ZyXEL omni.net lcd plus ISDN TA
		153	* Made startup info message specify which drivers were compiled in.
		154	*
		155	* (04/03/2000) gkh
		156	* Changed the probe process to remove the module unload races.
		157	* Changed where the tty layer gets initialized to have devfs work nicer.
		158	* Added initial devfs support.
		159	*
		160	* (03/26/2000) gkh
		161	* Split driver up into device specific pieces.
		162	*
		163	* (03/19/2000) gkh
		164	* Fixed oops that could happen when device was removed while a program
		165	* was talking to the device.
		166	* Removed the static urbs and now all urbs are created and destroyed
		167	* dynamically.
		168	* Reworked the internal interface. Now everything is based on the
		169	* usb_serial_port structure instead of the larger usb_serial structure.
		170	* This fixes the bug that a multiport device could not have more than
		171	* one port open at one time.
		172	*
		173	* (03/17/2000) gkh
		174	* Added config option for debugging messages.
		175	* Added patch for keyspan pda from Brian Warner.
		176	*
		177	* (03/06/2000) gkh
		178	* Added the keyspan pda code from Brian Warner <warner@lothar.com>
		179	* Moved a bunch of the port specific stuff into its own structure. This
		180	* is in anticipation of the true multiport devices (there's a bug if you
		181	* try to access more than one port of any multiport device right now)
		182	*
		183	* (02/21/2000) gkh
		184	* Made it so that any serial devices only have to specify which functions
		185	* they want to overload from the generic function calls (great,
		186	* inheritance in C, in a driver, just what I wanted...)
		187	* Added support for set_termios and ioctl function calls. No drivers take
		188	* advantage of this yet.
		189	* Removed the #ifdef MODULE, now there is no module specific code.
		190	* Cleaned up a few comments in usb-serial.h that were wrong (thanks again
		191	* to Miles Lott).
		192	* Small fix to get_free_serial.
		193	*
		194	* (02/14/2000) gkh
		195	* Removed the Belkin and Peracom functionality from the driver due to
		196	* the lack of support from the vendor, and me not wanting people to
		197	* accidenatly buy the device, expecting it to work with Linux.
		198	* Added read_bulk_callback and write_bulk_callback to the type structure
		199	* for the needs of the FTDI and WhiteHEAT driver.
		200	* Changed all reverences to FTDI to FTDI_SIO at the request of Bill
		201	* Ryder.
		202	* Changed the output urb size back to the max endpoint size to make
		203	* the ftdi_sio driver have it easier, and due to the fact that it didn't
		204	* really increase the speed any.
		205	*
		206	* (02/11/2000) gkh
		207	* Added VISOR_FUNCTION_CONSOLE to the visor startup function. This was a
		208	* patch from Miles Lott (milos@insync.net).
		209	* Fixed bug with not restoring the minor range that a device grabs, if
		210	* the startup function fails (thanks Miles for finding this).
		211	*
		212	* (02/05/2000) gkh
		213	* Added initial framework for the Keyspan PDA serial converter so that
		214	* Brian Warner has a place to put his code.
		215	* Made the ezusb specific functions generic enough that different
		216	* devices can use them (whiteheat and keyspan_pda both need them).
		217	* Split out a whole bunch of structure and other stuff to a separate
		218	* usb-serial.h file.
		219	* Made the Visor connection messages a little more understandable, now
		220	* that Miles Lott (milos@insync.net) has gotten the Generic channel to
		221	* work. Also made them always show up in the log file.
		222	*
		223	* (01/25/2000) gkh
		224	* Added initial framework for FTDI serial converter so that Bill Ryder
		225	* has a place to put his code.
		226	* Added the vendor specific info from Handspring. Now we can print out
		227	* informational debug messages as well as understand what is happening.
		228	*
		229	* (01/23/2000) gkh
		230	* Fixed problem of crash when trying to open a port that didn't have a
		231	* device assigned to it. Made the minor node finding a little smarter,
		232	* now it looks to find a continuous space for the new device.
		233	*
		234	* (01/21/2000) gkh
		235	* Fixed bug in visor_startup with patch from Miles Lott (milos@insync.net)
		236	* Fixed get_serial_by_minor which was all messed up for multi port
		237	* devices. Fixed multi port problem for generic devices. Now the number
		238	* of ports is determined by the number of bulk out endpoints for the
		239	* generic device.
		240	*
		241	* (01/19/2000) gkh
		242	* Removed lots of cruft that was around from the old (pre urb) driver
		243	* interface.
		244	* Made the serial_table dynamic. This should save lots of memory when
		245	* the number of minor nodes goes up to 256.
		246	* Added initial support for devices that have more than one port.
		247	* Added more debugging comments for the Visor, and added a needed
		248	* set_configuration call.
		249	*
		250	* (01/17/2000) gkh
		251	* Fixed the WhiteHEAT firmware (my processing tool had a bug)
		252	* and added new debug loader firmware for it.
		253	* Removed the put_char function as it isn't really needed.
		254	* Added visor startup commands as found by the Win98 dump.
		255	*
		256	* (01/13/2000) gkh
		257	* Fixed the vendor id for the generic driver to the one I meant it to be.
		258	*
		259	* (01/12/2000) gkh
		260	* Forget the version numbering...that's pretty useless...
		261	* Made the driver able to be compiled so that the user can select which
		262	* converter they want to use. This allows people who only want the Visor
		263	* support to not pay the memory size price of the WhiteHEAT.
		264	* Fixed bug where the generic driver (idVendor=0000 and idProduct=0000)
		265	* grabbed the root hub. Not good.
		266	*
		267	* version 0.4.0 (01/10/2000) gkh
		268	* Added whiteheat.h containing the firmware for the ConnectTech WhiteHEAT
		269	* device. Added startup function to allow firmware to be downloaded to
		270	* a device if it needs to be.
		271	* Added firmware download logic to the WhiteHEAT device.
		272	* Started to add #defines to split up the different drivers for potential
		273	* configuration option.
		274	*
		275	* version 0.3.1 (12/30/99) gkh
		276	* Fixed problems with urb for bulk out.
		277	* Added initial support for multiple sets of endpoints. This enables
		278	* the Handspring Visor to be attached successfully. Only the first
		279	* bulk in / bulk out endpoint pair is being used right now.
		280	*
		281	* version 0.3.0 (12/27/99) gkh
		282	* Added initial support for the Handspring Visor based on a patch from
		283	* Miles Lott (milos@sneety.insync.net)
		284	* Cleaned up the code a bunch and converted over to using urbs only.
		285	*
		286	* version 0.2.3 (12/21/99) gkh
		287	* Added initial support for the Connect Tech WhiteHEAT converter.
		288	* Incremented the number of ports in expectation of getting the
		289	* WhiteHEAT to work properly (4 ports per connection).
		290	* Added notification on insertion and removal of what port the
		291	* device is/was connected to (and what kind of device it was).
		292	*
		293	* version 0.2.2 (12/16/99) gkh
		294	* Changed major number to the new allocated number. We're legal now!
		295	*
		296	* version 0.2.1 (12/14/99) gkh
		297	* Fixed bug that happens when device node is opened when there isn't a
		298	* device attached to it. Thanks to marek@webdesign.no for noticing this.
		299	*
		300	* version 0.2.0 (11/10/99) gkh
		301	* Split up internals to make it easier to add different types of serial
		302	* converters to the code.
		303	* Added a "generic" driver that gets it's vendor and product id
		304	* from when the module is loaded. Thanks to David E. Nelson (dnelson@jump.net)
		305	* for the idea and sample code (from the usb scanner driver.)
		306	* Cleared up any licensing questions by releasing it under the GNU GPL.
		307	*
		308	* version 0.1.2 (10/25/99) gkh
		309	* Fixed bug in detecting device.
		310	*
		311	* version 0.1.1 (10/05/99) gkh
		312	* Changed the major number to not conflict with anything else.
		313	*
		314	* version 0.1 (09/28/99) gkh
		315	* Can recognize the two different devices and start up a read from
		316	* device when asked to. Writes also work. No control signals yet, this
		317	* all is vendor specific data (i.e. no spec), also no control for
		318	* different baud rates or other bit settings.
		319	* Currently we are using the same devid as the acm driver. This needs
		320	* to change.
		321	*
		322	*/
		323
		324	#include <linuxcomp.h>
		325
		326	#include <linux/config.h>
		327	#include <linux/kernel.h>
		328	#include <linux/errno.h>
		329	#include <linux/init.h>
		330	#include <linux/slab.h>
		331	#include <linux/tty.h>
		332	#include <linux/tty_driver.h>
		333	#include <linux/tty_flip.h>
		334	#include <linux/module.h>
		335	#include <linux/spinlock.h>
		336	#include <linux/list.h>
		337	#include <linux/smp_lock.h>
		338	#include <asm/uaccess.h>
		339	#include <linux/usb.h>
		340
		341
		342	#ifdef CONFIG_USB_SERIAL_DEBUG
		343	static int debug = 1;
		344	#else
		345	static int debug;
		346	#endif
		347
		348	#include "usb-serial.h"
		349	#include "pl2303.h"
		350
		351	/*
		352	* Version Information
		353	*/
		354	#define DRIVER_VERSION "v2.0"
		355	#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/"
		356	#define DRIVER_DESC "USB Serial Driver core"
		357
		358
		359	#ifdef CONFIG_USB_SERIAL_GENERIC
		360	/* we want to look at all devices, as the vendor/product id can change
		361	* depending on the command line argument */
		362	static struct usb_device_id generic_serial_ids[] = {
		363	{.driver_info = 42},
		364	{}
		365	};
		366
		367	#endif /* CONFIG_USB_SERIAL_GENERIC */
		368
		369	/* Driver structure we register with the USB core */
		370	static struct usb_driver usb_serial_driver = {
		371	.owner = THIS_MODULE,
		372	.name = "usbserial",
		373	.probe = usb_serial_probe,
		374	.disconnect = usb_serial_disconnect,
		375	#ifdef CONFIG_USB_SERIAL_GENERIC
		376	.id_table = generic_serial_ids,
		377	#endif
		378	};
		379
		380	/* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead
		381	the MODULE_DEVICE_TABLE declarations in each serial driver
		382	cause the "hotplug" program to pull in whatever module is necessary
		383	via modprobe, and modprobe will load usbserial because the serial
		384	drivers depend on it.
		385	*/
		386
		387	static struct usb_serial serial_table[SERIAL_TTY_MINORS]; / initially all NULL */
		388	static LIST_HEAD(usb_serial_driver_list);
		389
		390
		391	struct usb_serial *usb_serial_get_by_index(unsigned index)
		392	{
		393	struct usb_serial *serial = serial_table[index];
		394
		395	if (serial)
		396	kobject_get (&serial->kobj);
		397	return serial;
		398	}
		399
		400	static struct usb_serial get_free_serial (struct usb_serial serial, int num_ports, unsigned int *minor)
		401	{
		402	unsigned int i, j;
		403	int good_spot;
		404
		405	dbg("%s %d", __FUNCTION__, num_ports);
		406
		407	*minor = 0;
		408	for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
		409	if (serial_table[i])
		410	continue;
		411
		412	good_spot = 1;
		413	for (j = 1; j <= num_ports-1; ++j)
		414	if ((serial_table[i+j]) \|\| (i+j >= SERIAL_TTY_MINORS)) {
		415	good_spot = 0;
		416	i += j;
		417	break;
		418	}
		419	if (good_spot == 0)
		420	continue;
		421
		422	serial->magic = USB_SERIAL_MAGIC;
		423	*minor = i;
		424	dbg("%s - minor base = %d", __FUNCTION__, *minor);
		425	for (i = minor; (i < (minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i)
		426	serial_table[i] = serial;
		427	return serial;
		428	}
		429	return NULL;
		430	}
		431
		432	static void return_serial (struct usb_serial *serial)
		433	{
		434	int i;
		435
		436	dbg("%s", __FUNCTION__);
		437	printk("Returning serial %d ports %d\n", serial->minor, serial->num_ports);
		438
		439	if (serial == NULL)
		440	return;
		441
		442	for (i = 0; i < serial->num_ports; ++i) {
		443	serial_table[serial->minor + i] = NULL;
		444	}
		445
		446	return;
		447	}
		448
		449	/*****************************************************************************
		450	* Driver tty interface functions
		451	*****************************************************************************/
		452	/static/ int serial_open (struct tty_struct tty, struct file filp)
		453	{
		454	struct usb_serial *serial;
		455	struct usb_serial_port *port;
		456	unsigned int portNumber;
		457	int retval = 0;
		458
		459	dbg("%s", __FUNCTION__);
		460
		461	/* initialize the pointer incase something fails */
		462	tty->driver_data = NULL;
		463
		464	/* get the serial object associated with this tty pointer */
		465	serial = usb_serial_get_by_index(tty->index);
		466
		467	if (serial_paranoia_check (serial, __FUNCTION__))
		468	return -ENODEV;
		469
		470	/* set up our port structure making the tty driver remember our port object, and us it */
		471	portNumber = tty->index - serial->minor;
		472	port = serial->port[portNumber];
		473	tty->driver_data = port;
		474
		475	port->tty = tty;
		476
		477	/* lock this module before we call it,
		478	this may, which means we must bail out, safe because we are called with BKL held */
		479	if (!try_module_get(serial->type->owner)) {
		480	retval = -ENODEV;
		481	goto bailout;
		482	}
		483
		484	++port->open_count;
		485	if (port->open_count == 1) {
		486	/* only call the device specific open if this
		487	* is the first time the port is opened */
		488	retval = serial->type->open(port, filp);
		489	if (retval) {
		490	port->open_count = 0;
		491	module_put(serial->type->owner);
		492	kobject_put(&serial->kobj);
		493	}
		494	}
		495	bailout:
		496	return retval;
		497	}
		498
		499	static void serial_close(struct tty_struct tty, struct file filp)
		500	{
		501	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		502	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		503
		504	if (!serial)
		505	return;
		506
		507	dbg("%s - port %d", __FUNCTION__, port->number);
		508
		509	--port->open_count;
		510	if (port->open_count <= 0) {
		511	/* only call the device specific close if this
		512	* port is being closed by the last owner */
		513	port->serial->type->close(port, filp);
		514	port->open_count = 0;
		515
		516	if (port->tty) {
		517	if (port->tty->driver_data)
		518	port->tty->driver_data = NULL;
		519	port->tty = NULL;
		520	}
		521	}
		522
		523	module_put(port->serial->type->owner);
		524	kobject_put(&port->serial->kobj);
		525	}
		526
		527	/static/ int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
		528	{
		529	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		530	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		531	int retval = -EINVAL;
		532
		533	if (!serial)
		534	return -ENODEV;
		535
		536	dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);
		537
		538	if (!port->open_count) {
		539	dbg("%s - port not opened", __FUNCTION__);
		540	goto exit;
		541	}
		542
		543	/* pass on to the driver specific version of this function */
		544	retval = serial->type->write(port, from_user, buf, count);
		545
		546	exit:
		547	return retval;
		548	}
		549
		550	static int serial_write_room (struct tty_struct *tty)
		551	{
		552	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		553	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		554	int retval = -EINVAL;
		555
		556	if (!serial)
		557	return -ENODEV;
		558
		559	dbg("%s - port %d", __FUNCTION__, port->number);
		560
		561	if (!port->open_count) {
		562	dbg("%s - port not open", __FUNCTION__);
		563	goto exit;
		564	}
		565
		566	/* pass on to the driver specific version of this function */
		567	retval = serial->type->write_room(port);
		568
		569	exit:
		570	return retval;
		571	}
		572
		573	static int serial_chars_in_buffer (struct tty_struct *tty)
		574	{
		575	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		576	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		577	int retval = -EINVAL;
		578
		579	if (!serial)
		580	return -ENODEV;
		581
		582	dbg("%s = port %d", __FUNCTION__, port->number);
		583
		584	if (!port->open_count) {
		585	dbg("%s - port not open", __FUNCTION__);
		586	goto exit;
		587	}
		588
		589	/* pass on to the driver specific version of this function */
		590	retval = serial->type->chars_in_buffer(port);
		591
		592	exit:
		593	return retval;
		594	}
		595
		596	static void serial_throttle (struct tty_struct * tty)
		597	{
		598	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		599	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		600
		601	if (!serial)
		602	return;
		603
		604	dbg("%s - port %d", __FUNCTION__, port->number);
		605
		606	if (!port->open_count) {
		607	dbg ("%s - port not open", __FUNCTION__);
		608	goto exit;
		609	}
		610
		611	/* pass on to the driver specific version of this function */
		612	if (serial->type->throttle)
		613	serial->type->throttle(port);
		614
		615	exit:
		616	;
		617	}
		618
		619	static void serial_unthrottle (struct tty_struct * tty)
		620	{
		621	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		622	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		623
		624	if (!serial)
		625	return;
		626
		627	dbg("%s - port %d", __FUNCTION__, port->number);
		628
		629	if (!port->open_count) {
		630	dbg("%s - port not open", __FUNCTION__);
		631	goto exit;
		632	}
		633
		634	/* pass on to the driver specific version of this function */
		635	if (serial->type->unthrottle)
		636	serial->type->unthrottle(port);
		637
		638	exit:
		639	;
		640	}
		641
		642	static int serial_ioctl (struct tty_struct tty, struct file file, unsigned int cmd, unsigned long arg)
		643	{
		644	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		645	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		646	int retval = -ENODEV;
		647
		648	if (!serial)
		649	return -ENODEV;
		650
		651	dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
		652
		653	if (!port->open_count) {
		654	dbg ("%s - port not open", __FUNCTION__);
		655	goto exit;
		656	}
		657
		658	/* pass on to the driver specific version of this function if it is available */
		659	if (serial->type->ioctl)
		660	retval = serial->type->ioctl(port, file, cmd, arg);
		661	else
		662	retval = -ENOIOCTLCMD;
		663
		664	exit:
		665	return retval;
		666	}
		667
		668	static void serial_set_termios (struct tty_struct tty, struct termios old)
		669	{
		670	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		671	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		672
		673	if (!serial)
		674	return;
		675
		676	dbg("%s - port %d", __FUNCTION__, port->number);
		677
		678	if (!port->open_count) {
		679	dbg("%s - port not open", __FUNCTION__);
		680	goto exit;
		681	}
		682
		683	/* pass on to the driver specific version of this function if it is available */
		684	if (serial->type->set_termios)
		685	serial->type->set_termios(port, old);
		686
		687	exit:
		688	;
		689	}
		690
		691	static void serial_break (struct tty_struct *tty, int break_state)
		692	{
		693	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		694	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		695
		696	if (!serial)
		697	return;
		698
		699	dbg("%s - port %d", __FUNCTION__, port->number);
		700
		701	if (!port->open_count) {
		702	dbg("%s - port not open", __FUNCTION__);
		703	goto exit;
		704	}
		705
		706	/* pass on to the driver specific version of this function if it is available */
		707	if (serial->type->break_ctl)
		708	serial->type->break_ctl(port, break_state);
		709
		710	exit:
		711	;
		712	}
		713
		714	static void serial_shutdown (struct usb_serial *serial)
		715	{
		716	dbg ("%s", __FUNCTION__);
		717
		718	serial->type->shutdown(serial);
		719	}
		720
		721	static int serial_read_proc (char page, char start, off_t off, int count, int eof, void *data)
		722	{
		723	struct usb_serial *serial;
		724	int length = 0;
		725	int i;
		726	off_t begin = 0;
		727	char tmp[40];
		728
		729	dbg("%s", __FUNCTION__);
		730	length += sprintf26 (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION);
		731	for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
		732	serial = usb_serial_get_by_index(i);
		733	if (serial == NULL)
		734	continue;
		735
		736	length += sprintf26 (page+length, "%d:", i);
		737	if (serial->type->owner)
		738	length += sprintf26 (page+length, " module:%s", module_name(serial->type->owner));
		739	length += sprintf26 (page+length, " name:\"%s\"", serial->type->name);
		740	length += sprintf26 (page+length, " vendor:%04x product:%04x", serial->vendor, serial->product);
		741	length += sprintf26 (page+length, " num_ports:%d", serial->num_ports);
		742	length += sprintf26 (page+length, " port:%d", i - serial->minor + 1);
		743
		744	usb_make_path(serial->dev, tmp, sizeof(tmp));
		745	length += sprintf26 (page+length, " path:%s", tmp);
		746
		747	length += sprintf26 (page+length, "\n");
		748	if ((length + begin) > (off + count))
		749	goto done;
		750	if ((length + begin) < off) {
		751	begin += length;
		752	length = 0;
		753	}
		754	kobject_put(&serial->kobj);
		755	}
		756	*eof = 1;
		757	done:
		758	if (off >= (length + begin))
		759	return 0;
		760	*start = page + (off-begin);
		761	return ((count < begin+length-off) ? count : begin+length-off);
		762	}
		763
		764	static int serial_tiocmget (struct tty_struct tty, struct file file)
		765	{
		766	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		767	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		768
		769	if (!serial)
		770	goto exit;
		771
		772	dbg("%s - port %d", __FUNCTION__, port->number);
		773
		774	if (!port->open_count) {
		775	dbg("%s - port not open", __FUNCTION__);
		776	goto exit;
		777	}
		778
		779	if (serial->type->tiocmget)
		780	return serial->type->tiocmget(port, file);
		781
		782	exit:
		783	return -EINVAL;
		784	}
		785
		786	static int serial_tiocmset (struct tty_struct tty, struct file file,
		787	unsigned int set, unsigned int clear)
		788	{
		789	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		790	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		791
		792	if (!serial)
		793	goto exit;
		794
		795	dbg("%s - port %d", __FUNCTION__, port->number);
		796
		797	if (!port->open_count) {
		798	dbg("%s - port not open", __FUNCTION__);
		799	goto exit;
		800	}
		801
		802	if (serial->type->tiocmset)
		803	return serial->type->tiocmset(port, file, set, clear);
		804
		805	exit:
		806	return -EINVAL;
		807	}
		808
		809	void usb_serial_port_softint(void *private)
		810	{
		811	struct usb_serial_port port = (struct usb_serial_port )private;
		812	struct usb_serial *serial;
		813	struct tty_struct *tty;
		814
		815	dbg("%s - port %d", __FUNCTION__, port->number);
		816
		817	if (!port)
		818	return;
		819
		820	serial = get_usb_serial (port, __FUNCTION__);
		821	if (!serial)
		822	return;
		823
		824	tty = port->tty;
		825	if (!tty)
		826	return;
		827
		828	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) {
		829	dbg("%s - write wakeup call.", __FUNCTION__);
		830	(tty->ldisc.write_wakeup)(tty);
		831	}
		832
		833	wake_up_interruptible(&tty->write_wait);
		834	}
		835
		836	static void destroy_serial (struct kobject *kobj)
		837	{
		838	struct usb_serial *serial;
		839	struct usb_serial_port *port;
		840	int i;
		841
		842	dbg ("%s - %s", __FUNCTION__, kobj->name);
		843
		844	serial = to_usb_serial(kobj);
		845	serial_shutdown (serial);
		846
		847	/* return the minor range that this device had */
		848	return_serial(serial);
		849
		850	for (i = 0; i < serial->num_ports; ++i)
		851	serial->port[i]->open_count = 0;
		852
		853	/* the ports are cleaned up and released in port_release() */
		854	for (i = 0; i < serial->num_ports; ++i)
		855	if (serial->port[i]->dev.parent != NULL) {
		856	device_unregister(&serial->port[i]->dev);
		857	serial->port[i] = NULL;
		858	}
		859
		860	/* If this is a "fake" port, we have to clean it up here, as it will
		861	* not get cleaned up in port_release() as it was never registered with
		862	* the driver core */
		863	if (serial->num_ports < serial->num_port_pointers) {
		864	for (i = serial->num_ports; i < serial->num_port_pointers; ++i) {
		865	port = serial->port[i];
		866	if (!port)
		867	continue;
		868	if (port->read_urb) {
		869	usb_unlink_urb(port->read_urb);
		870	usb_free_urb(port->read_urb);
		871	}
		872	if (port->write_urb) {
		873	usb_unlink_urb(port->write_urb);
		874	usb_free_urb(port->write_urb);
		875	}
		876	if (port->interrupt_in_urb) {
		877	usb_unlink_urb(port->interrupt_in_urb);
		878	usb_free_urb(port->interrupt_in_urb);
		879	}
		880	kfree(port->bulk_in_buffer);
		881	kfree(port->bulk_out_buffer);
		882	kfree(port->interrupt_in_buffer);
		883	}
		884	}
		885
		886	usb_put_dev(serial->dev);
		887
		888	/* free up any memory that we allocated */
		889	kfree (serial);
		890	}
		891
		892	static struct kobj_type usb_serial_kobj_type = {
		893	.release = destroy_serial,
		894	};
		895
		896	static void port_release(struct device *dev)
		897	{
		898	struct usb_serial_port *port = to_usb_serial_port(dev);
		899
		900	dbg ("%s - %s", __FUNCTION__, dev->bus_id);
		901	if (port->read_urb) {
		902	usb_unlink_urb(port->read_urb);
		903	usb_free_urb(port->read_urb);
		904	}
		905	if (port->write_urb) {
		906	usb_unlink_urb(port->write_urb);
		907	usb_free_urb(port->write_urb);
		908	}
		909	if (port->interrupt_in_urb) {
		910	usb_unlink_urb(port->interrupt_in_urb);
		911	usb_free_urb(port->interrupt_in_urb);
		912	}
		913	kfree(port->bulk_in_buffer);
		914	kfree(port->bulk_out_buffer);
		915	kfree(port->interrupt_in_buffer);
		916	kfree(port);
		917	}
		918
		919	static struct usb_serial * create_serial (struct usb_device *dev,
		920	struct usb_interface *interface,
		921	struct usb_serial_device_type *type)
		922	{
		923	struct usb_serial *serial;
		924
		925	serial = kmalloc (sizeof (*serial), GFP_KERNEL);
		926	if (!serial) {
		927	dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
		928	return NULL;
		929	}
		930	memset (serial, 0, sizeof(*serial));
		931	serial->dev = usb_get_dev(dev);
		932	serial->type = type;
		933	serial->interface = interface;
		934	serial->vendor = dev->descriptor.idVendor;
		935	serial->product = dev->descriptor.idProduct;
		936
		937	/* initialize the kobject portion of the usb_device */
		938	kobject_init(&serial->kobj);
		939	serial->kobj.ktype = &usb_serial_kobj_type;
		940
		941	return serial;
		942	}
		943
		944	int usb_serial_probe(struct usb_interface *interface,
		945	const struct usb_device_id *id)
		946	{
		947	struct usb_device *dev = interface_to_usbdev (interface);
		948	struct usb_serial *serial = NULL;
		949	struct usb_serial_port *port;
		950	struct usb_host_interface *iface_desc;
		951	struct usb_endpoint_descriptor *endpoint;
		952	struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
		953	struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
		954	struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
		955	struct usb_serial_device_type *type = NULL;
		956	struct list_head *tmp;
		957	int retval;
		958	int found;
		959	int minor;
		960	int buffer_size;
		961	int i;
		962	int num_interrupt_in = 0;
		963	int num_bulk_in = 0;
		964	int num_bulk_out = 0;
		965	int num_ports = 0;
		966	int max_endpoints;
		967	const struct usb_device_id *id_pattern = NULL;
		968
		969	/* loop through our list of known serial converters, and see if this
		970	device matches. */
		971	found = 0;
		972	list_for_each (tmp, &usb_serial_driver_list) {
		973	type = list_entry(tmp, struct usb_serial_device_type, driver_list);
		974	id_pattern = usb_match_id(interface, type->id_table);
		975	if (id_pattern != NULL) {
		976	dbg("descriptor matches");
		977	found = 1;
		978	break;
		979	}
		980	}
		981	if (!found) {
		982	/* no match */
		983	dbg("none matched");
		984	return -ENODEV;
		985	}
		986	serial = create_serial (dev, interface, type);
		987	if (!serial) {
		988	dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__);
		989	return -ENODEV;
		990	}
		991
		992	/* if this device type has a probe function, call it */
		993	if (type->probe) {
		994	if (!try_module_get(type->owner)) {
		995	dev_err(&interface->dev, "module get failed, exiting\n");
		996	kfree (serial);
		997	return -EIO;
		998	}
		999	retval = type->probe (serial, id_pattern);
		1000	module_put(type->owner);
		1001
		1002	if (retval) {
		1003	dbg ("sub driver rejected device");
		1004	kfree (serial);
		1005	return retval;
		1006	}
		1007	}
		1008
		1009	/* descriptor matches, let's find the endpoints needed */
		1010	/* check out the endpoints */
		1011	iface_desc = &interface->altsetting[0];
		1012	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		1013	endpoint = &iface_desc->endpoint[i].desc;
		1014
		1015	if ((endpoint->bEndpointAddress & 0x80) &&
		1016	((endpoint->bmAttributes & 3) == 0x02)) {
		1017	/* we found a bulk in endpoint */
		1018	dbg("found bulk in");
		1019	bulk_in_endpoint[num_bulk_in] = endpoint;
		1020	++num_bulk_in;
		1021	}
		1022
		1023	if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
		1024	((endpoint->bmAttributes & 3) == 0x02)) {
		1025	/* we found a bulk out endpoint */
		1026	dbg("found bulk out");
		1027	bulk_out_endpoint[num_bulk_out] = endpoint;
		1028	++num_bulk_out;
		1029	}
		1030
		1031	if ((endpoint->bEndpointAddress & 0x80) &&
		1032	((endpoint->bmAttributes & 3) == 0x03)) {
		1033	/* we found a interrupt in endpoint */
		1034	dbg("found interrupt in");
		1035	interrupt_in_endpoint[num_interrupt_in] = endpoint;
		1036	++num_interrupt_in;
		1037	}
		1038	}
		1039
		1040	#if defined(CONFIG_USB_SERIAL_PL2303) \|\| defined(CONFIG_USB_SERIAL_PL2303_MODULE)
		1041	/* BEGIN HORRIBLE HACK FOR PL2303 */
		1042	/* this is needed due to the looney way its endpoints are set up */
		1043	if (((dev->descriptor.idVendor == PL2303_VENDOR_ID) &&
		1044	(dev->descriptor.idProduct == PL2303_PRODUCT_ID)) \|\|
		1045	((dev->descriptor.idVendor == ATEN_VENDOR_ID) &&
		1046	(dev->descriptor.idProduct == ATEN_PRODUCT_ID))) {
		1047	if (interface != dev->actconfig->interface[0]) {
		1048	/* check out the endpoints of the other interface*/
		1049	iface_desc = &dev->actconfig->interface[0]->altsetting[0];
		1050	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		1051	endpoint = &iface_desc->endpoint[i].desc;
		1052	if ((endpoint->bEndpointAddress & 0x80) &&
		1053	((endpoint->bmAttributes & 3) == 0x03)) {
		1054	/* we found a interrupt in endpoint */
		1055	dbg("found interrupt in for Prolific device on separate interface");
		1056	interrupt_in_endpoint[num_interrupt_in] = endpoint;
		1057	++num_interrupt_in;
		1058	}
		1059	}
		1060	}
		1061
		1062	/* Now make sure the PL-2303 is configured correctly.
		1063	* If not, give up now and hope this hack will work
		1064	* properly during a later invocation of usb_serial_probe
		1065	*/
		1066	if (num_bulk_in == 0 \|\| num_bulk_out == 0) {
		1067	dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n");
		1068	kfree (serial);
		1069	return -ENODEV;
		1070	}
		1071	}
		1072	/* END HORRIBLE HACK FOR PL2303 */
		1073	#endif
		1074
		1075	/* found all that we need */
		1076	dev_info(&interface->dev, "%s converter detected\n", type->name);
		1077
		1078	#ifdef CONFIG_USB_SERIAL_GENERIC
		1079	if (type == &usb_serial_generic_device) {
		1080	num_ports = num_bulk_out;
		1081	if (num_ports == 0) {
		1082	dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n");
		1083	kfree (serial);
		1084	return -EIO;
		1085	}
		1086	}
		1087	#endif
		1088	if (!num_ports) {
		1089	/* if this device type has a calc_num_ports function, call it */
		1090	if (type->calc_num_ports) {
		1091	if (!try_module_get(type->owner)) {
		1092	dev_err(&interface->dev, "module get failed, exiting\n");
		1093	kfree (serial);
		1094	return -EIO;
		1095	}
		1096	num_ports = type->calc_num_ports (serial);
		1097	module_put(type->owner);
		1098	}
		1099	if (!num_ports)
		1100	num_ports = type->num_ports;
		1101	}
		1102
		1103	if (get_free_serial (serial, num_ports, &minor) == NULL) {
		1104	dev_err(&interface->dev, "No more free serial devices\n");
		1105	kfree (serial);
		1106	return -ENOMEM;
		1107	}
		1108
		1109	serial->minor = minor;
		1110	serial->num_ports = num_ports;
		1111	serial->num_bulk_in = num_bulk_in;
		1112	serial->num_bulk_out = num_bulk_out;
		1113	serial->num_interrupt_in = num_interrupt_in;
		1114
		1115	/* create our ports, we need as many as the max endpoints */
		1116	/* we don't use num_ports here cauz some devices have more endpoint pairs than ports */
		1117	max_endpoints = max(num_bulk_in, num_bulk_out);
		1118	max_endpoints = max(max_endpoints, num_interrupt_in);
		1119	max_endpoints = max(max_endpoints, (int)serial->num_ports);
		1120	serial->num_port_pointers = max_endpoints;
		1121	dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints);
		1122	for (i = 0; i < max_endpoints; ++i) {
		1123	port = kmalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
		1124	if (!port)
		1125	goto probe_error;
		1126	memset(port, 0x00, sizeof(struct usb_serial_port));
		1127	port->number = i + serial->minor;
		1128	port->serial = serial;
		1129	port->magic = USB_SERIAL_PORT_MAGIC;
		1130	INIT_WORK(&port->work, usb_serial_port_softint, port);
		1131	serial->port[i] = port;
		1132	}
		1133
		1134	/* set up the endpoint information */
		1135	for (i = 0; i < num_bulk_in; ++i) {
		1136	endpoint = bulk_in_endpoint[i];
		1137	port = serial->port[i];
		1138	port->read_urb = usb_alloc_urb (0, GFP_KERNEL);
		1139	if (!port->read_urb) {
		1140	dev_err(&interface->dev, "No free urbs available\n");
		1141	goto probe_error;
		1142	}
		1143	buffer_size = endpoint->wMaxPacketSize;
		1144
		1145	port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
		1146	port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
		1147	if (!port->bulk_in_buffer) {
		1148	dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n");
		1149	goto probe_error;
		1150	}
		1151	usb_fill_bulk_urb (port->read_urb, dev,
		1152	usb_rcvbulkpipe (dev,
		1153	endpoint->bEndpointAddress),
		1154	port->bulk_in_buffer, buffer_size,
		1155	serial->type->read_bulk_callback,
		1156	port);
		1157	}
		1158
		1159	for (i = 0; i < num_bulk_out; ++i) {
		1160	endpoint = bulk_out_endpoint[i];
		1161	port = serial->port[i];
		1162	port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
		1163	if (!port->write_urb) {
		1164	dev_err(&interface->dev, "No free urbs available\n");
		1165	goto probe_error;
		1166	}
		1167	buffer_size = endpoint->wMaxPacketSize;
		1168	port->bulk_out_size = buffer_size;
		1169	port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
		1170	port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL);
		1171	if (!port->bulk_out_buffer) {
		1172	dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n");
		1173	goto probe_error;
		1174	}
		1175	usb_fill_bulk_urb (port->write_urb, dev,
		1176	usb_sndbulkpipe (dev,
		1177	endpoint->bEndpointAddress),
		1178	port->bulk_out_buffer, buffer_size,
		1179	serial->type->write_bulk_callback,
		1180	port);
		1181	}
		1182
		1183	for (i = 0; i < num_interrupt_in; ++i) {
		1184	endpoint = interrupt_in_endpoint[i];
		1185	port = serial->port[i];
		1186	port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
		1187	if (!port->interrupt_in_urb) {
		1188	dev_err(&interface->dev, "No free urbs available\n");
		1189	goto probe_error;
		1190	}
		1191	buffer_size = endpoint->wMaxPacketSize;
		1192	port->interrupt_in_endpointAddress = endpoint->bEndpointAddress;
		1193	port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
		1194	if (!port->interrupt_in_buffer) {
		1195	dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n");
		1196	goto probe_error;
		1197	}
		1198	usb_fill_int_urb (port->interrupt_in_urb, dev,
		1199	usb_rcvintpipe (dev,
		1200	endpoint->bEndpointAddress),
		1201	port->interrupt_in_buffer, buffer_size,
		1202	serial->type->read_int_callback, port,
		1203	endpoint->bInterval);
		1204	}
		1205
		1206	/* if this device type has an attach function, call it */
		1207	if (type->attach) {
		1208	if (!try_module_get(type->owner)) {
		1209	dev_err(&interface->dev, "module get failed, exiting\n");
		1210	goto probe_error;
		1211	}
		1212	retval = type->attach (serial);
		1213	module_put(type->owner);
		1214	if (retval < 0)
		1215	goto probe_error;
		1216	if (retval > 0) {
		1217	/* quietly accept this device, but don't bind to a serial port
		1218	* as it's about to disappear */
		1219	goto exit;
		1220	}
		1221	}
		1222
		1223	/* register all of the individual ports with the driver core */
		1224	for (i = 0; i < num_ports; ++i) {
		1225	port = serial->port[i];
		1226	port->dev.parent = &interface->dev;
		1227	port->dev.driver = NULL;
		1228	port->dev.bus = &usb_serial_bus_type;
		1229	port->dev.release = &port_release;
		1230
		1231	snprintf26(&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number);
		1232	/dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id);/
		1233	device_register (&port->dev);
		1234	}
		1235
		1236	usb_serial_console_init (debug, minor);
		1237
		1238	exit:
		1239	/* success */
		1240	usb_set_intfdata (interface, serial);
		1241	return 0;
		1242
		1243	probe_error:
		1244	for (i = 0; i < num_bulk_in; ++i) {
		1245	port = serial->port[i];
		1246	if (!port)
		1247	continue;
		1248	if (port->read_urb)
		1249	usb_free_urb (port->read_urb);
		1250	kfree(port->bulk_in_buffer);
		1251	}
		1252	for (i = 0; i < num_bulk_out; ++i) {
		1253	port = serial->port[i];
		1254	if (!port)
		1255	continue;
		1256	if (port->write_urb)
		1257	usb_free_urb (port->write_urb);
		1258	kfree(port->bulk_out_buffer);
		1259	}
		1260	for (i = 0; i < num_interrupt_in; ++i) {
		1261	port = serial->port[i];
		1262	if (!port)
		1263	continue;
		1264	if (port->interrupt_in_urb)
		1265	usb_free_urb (port->interrupt_in_urb);
		1266	kfree(port->interrupt_in_buffer);
		1267	}
		1268
		1269	/* return the minor range that this device had */
		1270	return_serial (serial);
		1271
		1272	/* free up any memory that we allocated */
		1273	for (i = 0; i < serial->num_port_pointers; ++i)
		1274	kfree(serial->port[i]);
		1275	kfree (serial);
		1276	return -EIO;
		1277	}
		1278
		1279	void usb_serial_disconnect(struct usb_interface *interface)
		1280	{
		1281	struct usb_serial *serial = usb_get_intfdata (interface);
		1282	struct device *dev = &interface->dev;
		1283
		1284	dbg ("%s", __FUNCTION__);
		1285
		1286	usb_set_intfdata (interface, NULL);
		1287	if (serial) {
		1288	/* let the last holder of this object
		1289	* cause it to be cleaned up */
		1290	kobject_put (&serial->kobj);
		1291	}
		1292	dev_info(dev, "device disconnected\n");
		1293	}
		1294
		1295	static struct tty_operations serial_ops = {
		1296	.open = serial_open,
		1297	.close = serial_close,
		1298	.write = serial_write,
		1299	.write_room = serial_write_room,
		1300	.ioctl = serial_ioctl,
		1301	.set_termios = serial_set_termios,
		1302	.throttle = serial_throttle,
		1303	.unthrottle = serial_unthrottle,
		1304	.break_ctl = serial_break,
		1305	.chars_in_buffer = serial_chars_in_buffer,
		1306	.read_proc = serial_read_proc,
		1307	.tiocmget = serial_tiocmget,
		1308	.tiocmset = serial_tiocmset,
		1309	};
		1310
		1311	struct tty_driver *usb_serial_tty_driver;
		1312
		1313	/static/ int __init usb_serial_init(void)
		1314	{
		1315	int i;
		1316	int result = 0;
		1317
		1318	usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS);
		1319	if (!usb_serial_tty_driver)
		1320	return -ENOMEM;
		1321
		1322	/* Initialize our global data */
		1323	for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
		1324	serial_table[i] = NULL;
		1325	}
		1326
		1327	bus_register(&usb_serial_bus_type);
		1328
		1329	/* register the generic driver, if we should */
		1330	result = usb_serial_generic_register(debug);
		1331	if (result < 0) {
		1332	err("%s - registering generic driver failed", __FUNCTION__);
		1333	goto exit;
		1334	}
		1335
		1336	usb_serial_tty_driver->owner = THIS_MODULE;
		1337	usb_serial_tty_driver->driver_name = "usbserial";
		1338	usb_serial_tty_driver->devfs_name = "usb/tts/";
		1339	usb_serial_tty_driver->name = "ttyUSB";
		1340	usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
		1341	usb_serial_tty_driver->minor_start = 0;
		1342	usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
		1343	usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
		1344	usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW \| TTY_DRIVER_NO_DEVFS;
		1345	usb_serial_tty_driver->init_termios = tty_std_termios;
		1346	usb_serial_tty_driver->init_termios.c_cflag = B4800 \| CS8 \| CREAD \| HUPCL \| CLOCAL;
		1347	tty_set_operations(usb_serial_tty_driver, &serial_ops);
		1348	result = tty_register_driver(usb_serial_tty_driver);
		1349	if (result) {
		1350	err("%s - tty_register_driver failed", __FUNCTION__);
		1351	goto exit_generic;
		1352	}
		1353
		1354	/* register the USB driver */
		1355	result = usb_register(&usb_serial_driver);
		1356	if (result < 0) {
		1357	err("%s - usb_register failed", __FUNCTION__);
		1358	goto exit_tty;
		1359	}
		1360
		1361	info(DRIVER_DESC " " DRIVER_VERSION);
		1362
		1363	return result;
		1364
		1365	exit_tty:
		1366	tty_unregister_driver(usb_serial_tty_driver);
		1367
		1368	exit_generic:
		1369	usb_serial_generic_deregister();
		1370
		1371	exit:
		1372	err ("%s - returning with error %d", __FUNCTION__, result);
		1373	put_tty_driver(usb_serial_tty_driver);
		1374	return result;
		1375	}
		1376
		1377
		1378	/static/ void __exit usb_serial_exit(void)
		1379	{
		1380	usb_serial_console_exit();
		1381
		1382	usb_serial_generic_deregister();
		1383
		1384	usb_deregister(&usb_serial_driver);
		1385	tty_unregister_driver(usb_serial_tty_driver);
		1386	put_tty_driver(usb_serial_tty_driver);
		1387	bus_unregister(&usb_serial_bus_type);
		1388	}
		1389
		1390
		1391	module_init(usb_serial_init);
		1392	module_exit(usb_serial_exit);
		1393
		1394	#define set_to_generic_if_null(type, function) \
		1395	do { \
		1396	if (!type->function) { \
		1397	type->function = usb_serial_generic_##function; \
		1398	dbg("Had to override the " #function \
		1399	" usb serial operation with the generic one.");\
		1400	} \
		1401	} while (0)
		1402
		1403	static void fixup_generic(struct usb_serial_device_type *device)
		1404	{
		1405	set_to_generic_if_null(device, open);
		1406	set_to_generic_if_null(device, write);
		1407	set_to_generic_if_null(device, close);
		1408	set_to_generic_if_null(device, write_room);
		1409	set_to_generic_if_null(device, chars_in_buffer);
		1410	set_to_generic_if_null(device, read_bulk_callback);
		1411	set_to_generic_if_null(device, write_bulk_callback);
		1412	set_to_generic_if_null(device, shutdown);
		1413	}
		1414
		1415	int usb_serial_register(struct usb_serial_device_type *new_device)
		1416	{
		1417	int retval;
		1418
		1419	fixup_generic(new_device);
		1420
		1421	/* Add this device to our list of devices */
		1422	list_add(&new_device->driver_list, &usb_serial_driver_list);
		1423
		1424	retval = usb_serial_bus_register (new_device);
		1425
		1426	if (retval)
		1427	goto error;
		1428
		1429	info("USB Serial support registered for %s", new_device->name);
		1430
		1431	return retval;
		1432	error:
		1433	err("problem %d when registering driver %s", retval, new_device->name);
		1434	list_del(&new_device->driver_list);
		1435
		1436	return retval;
		1437	}
		1438
		1439
		1440	void usb_serial_deregister(struct usb_serial_device_type *device)
		1441	{
		1442	struct usb_serial *serial;
		1443	int i;
		1444
		1445	info("USB Serial deregistering driver %s", device->name);
		1446
		1447	/* clear out the serial_table if the device is attached to a port */
		1448	for(i = 0; i < SERIAL_TTY_MINORS; ++i) {
		1449	serial = serial_table[i];
		1450	if ((serial != NULL) && (serial->type == device)) {
		1451	usb_driver_release_interface (&usb_serial_driver, serial->interface);
		1452	usb_serial_disconnect (serial->interface);
		1453	}
		1454	}
		1455
		1456	list_del(&device->driver_list);
		1457	usb_serial_bus_deregister (device);
		1458	}
		1459
		1460
		1461
		1462	/* If the usb-serial core is built into the core, the usb-serial drivers
		1463	need these symbols to load properly as modules. */
		1464	EXPORT_SYMBOL(usb_serial_register);
		1465	EXPORT_SYMBOL(usb_serial_deregister);
		1466	EXPORT_SYMBOL(usb_serial_probe);
		1467	EXPORT_SYMBOL(usb_serial_disconnect);
		1468	EXPORT_SYMBOL(usb_serial_port_softint);
		1469
		1470
		1471	/* Module information */
		1472	MODULE_AUTHOR( DRIVER_AUTHOR );
		1473	MODULE_DESCRIPTION( DRIVER_DESC );
		1474	MODULE_LICENSE("GPL");
		1475
		1476	MODULE_PARM(debug, "i");
		1477	MODULE_PARM_DESC(debug, "Debug enabled or not");

Subversion Repositories shark

(root)/shark/branches/xen/drivers/usb/serial/usb-serial.c - Rev 1618