WebSVN - shark - Blame - Rev 846 - /shark/trunk/drivers/usb/serial/usb-serial.c

Rev	Author	Line No.	Line
846	giacomo	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
		438	if (serial == NULL)
		439	return;
		440
		441	for (i = 0; i < serial->num_ports; ++i) {
		442	serial_table[serial->minor + i] = NULL;
		443	}
		444
		445	return;
		446	}
		447
		448	/*****************************************************************************
		449	* Driver tty interface functions
		450	*****************************************************************************/
		451	/static/ int serial_open (struct tty_struct tty, struct file filp)
		452	{
		453	struct usb_serial *serial;
		454	struct usb_serial_port *port;
		455	unsigned int portNumber;
		456	int retval = 0;
		457
		458	dbg("%s", __FUNCTION__);
		459
		460	/* initialize the pointer incase something fails */
		461	tty->driver_data = NULL;
		462
		463	/* get the serial object associated with this tty pointer */
		464	serial = usb_serial_get_by_index(tty->index);
		465
		466	if (serial_paranoia_check (serial, __FUNCTION__))
		467	return -ENODEV;
		468
		469	/* set up our port structure making the tty driver remember our port object, and us it */
		470	portNumber = tty->index - serial->minor;
		471	port = serial->port[portNumber];
		472	tty->driver_data = port;
		473
		474	port->tty = tty;
		475
		476	/* lock this module before we call it,
		477	this may, which means we must bail out, safe because we are called with BKL held */
		478	if (!try_module_get(serial->type->owner)) {
		479	retval = -ENODEV;
		480	goto bailout;
		481	}
		482
		483	++port->open_count;
		484	if (port->open_count == 1) {
		485	/* only call the device specific open if this
		486	* is the first time the port is opened */
		487	retval = serial->type->open(port, filp);
		488	if (retval) {
		489	port->open_count = 0;
		490	module_put(serial->type->owner);
		491	kobject_put(&serial->kobj);
		492	}
		493	}
		494	bailout:
		495	return retval;
		496	}
		497
		498	static void serial_close(struct tty_struct tty, struct file filp)
		499	{
		500	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		501	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		502
		503	if (!serial)
		504	return;
		505
		506	dbg("%s - port %d", __FUNCTION__, port->number);
		507
		508	--port->open_count;
		509	if (port->open_count <= 0) {
		510	/* only call the device specific close if this
		511	* port is being closed by the last owner */
		512	port->serial->type->close(port, filp);
		513	port->open_count = 0;
		514
		515	if (port->tty) {
		516	if (port->tty->driver_data)
		517	port->tty->driver_data = NULL;
		518	port->tty = NULL;
		519	}
		520	}
		521
		522	module_put(port->serial->type->owner);
		523	kobject_put(&port->serial->kobj);
		524	}
		525
		526	/static/ int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
		527	{
		528	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		529	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		530	int retval = -EINVAL;
		531
		532	if (!serial)
		533	return -ENODEV;
		534
		535	dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);
		536
		537	if (!port->open_count) {
		538	dbg("%s - port not opened", __FUNCTION__);
		539	goto exit;
		540	}
		541
		542	/* pass on to the driver specific version of this function */
		543	retval = serial->type->write(port, from_user, buf, count);
		544
		545	exit:
		546	return retval;
		547	}
		548
		549	static int serial_write_room (struct tty_struct *tty)
		550	{
		551	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		552	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		553	int retval = -EINVAL;
		554
		555	if (!serial)
		556	return -ENODEV;
		557
		558	dbg("%s - port %d", __FUNCTION__, port->number);
		559
		560	if (!port->open_count) {
		561	dbg("%s - port not open", __FUNCTION__);
		562	goto exit;
		563	}
		564
		565	/* pass on to the driver specific version of this function */
		566	retval = serial->type->write_room(port);
		567
		568	exit:
		569	return retval;
		570	}
		571
		572	static int serial_chars_in_buffer (struct tty_struct *tty)
		573	{
		574	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		575	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		576	int retval = -EINVAL;
		577
		578	if (!serial)
		579	return -ENODEV;
		580
		581	dbg("%s = port %d", __FUNCTION__, port->number);
		582
		583	if (!port->open_count) {
		584	dbg("%s - port not open", __FUNCTION__);
		585	goto exit;
		586	}
		587
		588	/* pass on to the driver specific version of this function */
		589	retval = serial->type->chars_in_buffer(port);
		590
		591	exit:
		592	return retval;
		593	}
		594
		595	static void serial_throttle (struct tty_struct * tty)
		596	{
		597	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		598	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		599
		600	if (!serial)
		601	return;
		602
		603	dbg("%s - port %d", __FUNCTION__, port->number);
		604
		605	if (!port->open_count) {
		606	dbg ("%s - port not open", __FUNCTION__);
		607	goto exit;
		608	}
		609
		610	/* pass on to the driver specific version of this function */
		611	if (serial->type->throttle)
		612	serial->type->throttle(port);
		613
		614	exit:
		615	;
		616	}
		617
		618	static void serial_unthrottle (struct tty_struct * tty)
		619	{
		620	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		621	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		622
		623	if (!serial)
		624	return;
		625
		626	dbg("%s - port %d", __FUNCTION__, port->number);
		627
		628	if (!port->open_count) {
		629	dbg("%s - port not open", __FUNCTION__);
		630	goto exit;
		631	}
		632
		633	/* pass on to the driver specific version of this function */
		634	if (serial->type->unthrottle)
		635	serial->type->unthrottle(port);
		636
		637	exit:
		638	;
		639	}
		640
		641	static int serial_ioctl (struct tty_struct tty, struct file file, unsigned int cmd, unsigned long arg)
		642	{
		643	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		644	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		645	int retval = -ENODEV;
		646
		647	if (!serial)
		648	return -ENODEV;
		649
		650	dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
		651
		652	if (!port->open_count) {
		653	dbg ("%s - port not open", __FUNCTION__);
		654	goto exit;
		655	}
		656
		657	/* pass on to the driver specific version of this function if it is available */
		658	if (serial->type->ioctl)
		659	retval = serial->type->ioctl(port, file, cmd, arg);
		660	else
		661	retval = -ENOIOCTLCMD;
		662
		663	exit:
		664	return retval;
		665	}
		666
		667	static void serial_set_termios (struct tty_struct tty, struct termios old)
		668	{
		669	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		670	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		671
		672	if (!serial)
		673	return;
		674
		675	dbg("%s - port %d", __FUNCTION__, port->number);
		676
		677	if (!port->open_count) {
		678	dbg("%s - port not open", __FUNCTION__);
		679	goto exit;
		680	}
		681
		682	/* pass on to the driver specific version of this function if it is available */
		683	if (serial->type->set_termios)
		684	serial->type->set_termios(port, old);
		685
		686	exit:
		687	;
		688	}
		689
		690	static void serial_break (struct tty_struct *tty, int break_state)
		691	{
		692	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		693	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		694
		695	if (!serial)
		696	return;
		697
		698	dbg("%s - port %d", __FUNCTION__, port->number);
		699
		700	if (!port->open_count) {
		701	dbg("%s - port not open", __FUNCTION__);
		702	goto exit;
		703	}
		704
		705	/* pass on to the driver specific version of this function if it is available */
		706	if (serial->type->break_ctl)
		707	serial->type->break_ctl(port, break_state);
		708
		709	exit:
		710	;
		711	}
		712
		713	static void serial_shutdown (struct usb_serial *serial)
		714	{
		715	dbg ("%s", __FUNCTION__);
		716
		717	serial->type->shutdown(serial);
		718	}
		719
		720	static int serial_read_proc (char page, char start, off_t off, int count, int eof, void *data)
		721	{
		722	struct usb_serial *serial;
		723	int length = 0;
		724	int i;
		725	off_t begin = 0;
		726	char tmp[40];
		727
		728	dbg("%s", __FUNCTION__);
		729	length += sprintf26 (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION);
		730	for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
		731	serial = usb_serial_get_by_index(i);
		732	if (serial == NULL)
		733	continue;
		734
		735	length += sprintf26 (page+length, "%d:", i);
		736	if (serial->type->owner)
		737	length += sprintf26 (page+length, " module:%s", module_name(serial->type->owner));
		738	length += sprintf26 (page+length, " name:\"%s\"", serial->type->name);
		739	length += sprintf26 (page+length, " vendor:%04x product:%04x", serial->vendor, serial->product);
		740	length += sprintf26 (page+length, " num_ports:%d", serial->num_ports);
		741	length += sprintf26 (page+length, " port:%d", i - serial->minor + 1);
		742
		743	usb_make_path(serial->dev, tmp, sizeof(tmp));
		744	length += sprintf26 (page+length, " path:%s", tmp);
		745
		746	length += sprintf26 (page+length, "\n");
		747	if ((length + begin) > (off + count))
		748	goto done;
		749	if ((length + begin) < off) {
		750	begin += length;
		751	length = 0;
		752	}
		753	kobject_put(&serial->kobj);
		754	}
		755	*eof = 1;
		756	done:
		757	if (off >= (length + begin))
		758	return 0;
		759	*start = page + (off-begin);
		760	return ((count < begin+length-off) ? count : begin+length-off);
		761	}
		762
		763	static int serial_tiocmget (struct tty_struct tty, struct file file)
		764	{
		765	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		766	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		767
		768	if (!serial)
		769	goto exit;
		770
		771	dbg("%s - port %d", __FUNCTION__, port->number);
		772
		773	if (!port->open_count) {
		774	dbg("%s - port not open", __FUNCTION__);
		775	goto exit;
		776	}
		777
		778	if (serial->type->tiocmget)
		779	return serial->type->tiocmget(port, file);
		780
		781	exit:
		782	return -EINVAL;
		783	}
		784
		785	static int serial_tiocmset (struct tty_struct tty, struct file file,
		786	unsigned int set, unsigned int clear)
		787	{
		788	struct usb_serial_port port = (struct usb_serial_port ) tty->driver_data;
		789	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
		790
		791	if (!serial)
		792	goto exit;
		793
		794	dbg("%s - port %d", __FUNCTION__, port->number);
		795
		796	if (!port->open_count) {
		797	dbg("%s - port not open", __FUNCTION__);
		798	goto exit;
		799	}
		800
		801	if (serial->type->tiocmset)
		802	return serial->type->tiocmset(port, file, set, clear);
		803
		804	exit:
		805	return -EINVAL;
		806	}
		807
		808	void usb_serial_port_softint(void *private)
		809	{
		810	struct usb_serial_port port = (struct usb_serial_port )private;
		811	struct usb_serial *serial;
		812	struct tty_struct *tty;
		813
		814	dbg("%s - port %d", __FUNCTION__, port->number);
		815
		816	if (!port)
		817	return;
		818
		819	serial = get_usb_serial (port, __FUNCTION__);
		820	if (!serial)
		821	return;
		822
		823	tty = port->tty;
		824	if (!tty)
		825	return;
		826
		827	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) {
		828	dbg("%s - write wakeup call.", __FUNCTION__);
		829	(tty->ldisc.write_wakeup)(tty);
		830	}
		831
		832	wake_up_interruptible(&tty->write_wait);
		833	}
		834
		835	static void destroy_serial (struct kobject *kobj)
		836	{
		837	struct usb_serial *serial;
		838	struct usb_serial_port *port;
		839	int i;
		840
		841	dbg ("%s - %s", __FUNCTION__, kobj->name);
		842
		843	serial = to_usb_serial(kobj);
		844	serial_shutdown (serial);
		845
		846	/* return the minor range that this device had */
		847	return_serial(serial);
		848
		849	for (i = 0; i < serial->num_ports; ++i)
		850	serial->port[i]->open_count = 0;
		851
		852	/* the ports are cleaned up and released in port_release() */
		853	for (i = 0; i < serial->num_ports; ++i)
		854	if (serial->port[i]->dev.parent != NULL) {
		855	device_unregister(&serial->port[i]->dev);
		856	serial->port[i] = NULL;
		857	}
		858
		859	/* If this is a "fake" port, we have to clean it up here, as it will
		860	* not get cleaned up in port_release() as it was never registered with
		861	* the driver core */
		862	if (serial->num_ports < serial->num_port_pointers) {
		863	for (i = serial->num_ports; i < serial->num_port_pointers; ++i) {
		864	port = serial->port[i];
		865	if (!port)
		866	continue;
		867	if (port->read_urb) {
		868	usb_unlink_urb(port->read_urb);
		869	usb_free_urb(port->read_urb);
		870	}
		871	if (port->write_urb) {
		872	usb_unlink_urb(port->write_urb);
		873	usb_free_urb(port->write_urb);
		874	}
		875	if (port->interrupt_in_urb) {
		876	usb_unlink_urb(port->interrupt_in_urb);
		877	usb_free_urb(port->interrupt_in_urb);
		878	}
		879	kfree(port->bulk_in_buffer);
		880	kfree(port->bulk_out_buffer);
		881	kfree(port->interrupt_in_buffer);
		882	}
		883	}
		884
		885	usb_put_dev(serial->dev);
		886
		887	/* free up any memory that we allocated */
		888	kfree (serial);
		889	}
		890
		891	static struct kobj_type usb_serial_kobj_type = {
		892	.release = destroy_serial,
		893	};
		894
		895	static void port_release(struct device *dev)
		896	{
		897	struct usb_serial_port *port = to_usb_serial_port(dev);
		898
		899	dbg ("%s - %s", __FUNCTION__, dev->bus_id);
		900	if (port->read_urb) {
		901	usb_unlink_urb(port->read_urb);
		902	usb_free_urb(port->read_urb);
		903	}
		904	if (port->write_urb) {
		905	usb_unlink_urb(port->write_urb);
		906	usb_free_urb(port->write_urb);
		907	}
		908	if (port->interrupt_in_urb) {
		909	usb_unlink_urb(port->interrupt_in_urb);
		910	usb_free_urb(port->interrupt_in_urb);
		911	}
		912	kfree(port->bulk_in_buffer);
		913	kfree(port->bulk_out_buffer);
		914	kfree(port->interrupt_in_buffer);
		915	kfree(port);
		916	}
		917
		918	static struct usb_serial * create_serial (struct usb_device *dev,
		919	struct usb_interface *interface,
		920	struct usb_serial_device_type *type)
		921	{
		922	struct usb_serial *serial;
		923
		924	serial = kmalloc (sizeof (*serial), GFP_KERNEL);
		925	if (!serial) {
		926	dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
		927	return NULL;
		928	}
		929	memset (serial, 0, sizeof(*serial));
		930	serial->dev = usb_get_dev(dev);
		931	serial->type = type;
		932	serial->interface = interface;
		933	serial->vendor = dev->descriptor.idVendor;
		934	serial->product = dev->descriptor.idProduct;
		935
		936	/* initialize the kobject portion of the usb_device */
		937	kobject_init(&serial->kobj);
		938	serial->kobj.ktype = &usb_serial_kobj_type;
		939
		940	return serial;
		941	}
		942
		943	int usb_serial_probe(struct usb_interface *interface,
		944	const struct usb_device_id *id)
		945	{
		946	struct usb_device *dev = interface_to_usbdev (interface);
		947	struct usb_serial *serial = NULL;
		948	struct usb_serial_port *port;
		949	struct usb_host_interface *iface_desc;
		950	struct usb_endpoint_descriptor *endpoint;
		951	struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
		952	struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
		953	struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
		954	struct usb_serial_device_type *type = NULL;
		955	struct list_head *tmp;
		956	int retval;
		957	int found;
		958	int minor;
		959	int buffer_size;
		960	int i;
		961	int num_interrupt_in = 0;
		962	int num_bulk_in = 0;
		963	int num_bulk_out = 0;
		964	int num_ports = 0;
		965	int max_endpoints;
		966	const struct usb_device_id *id_pattern = NULL;
		967
		968	/* loop through our list of known serial converters, and see if this
		969	device matches. */
		970	found = 0;
		971	list_for_each (tmp, &usb_serial_driver_list) {
		972	type = list_entry(tmp, struct usb_serial_device_type, driver_list);
		973	id_pattern = usb_match_id(interface, type->id_table);
		974	if (id_pattern != NULL) {
		975	dbg("descriptor matches");
		976	found = 1;
		977	break;
		978	}
		979	}
		980	if (!found) {
		981	/* no match */
		982	dbg("none matched");
		983	return -ENODEV;
		984	}
		985	serial = create_serial (dev, interface, type);
		986	if (!serial) {
		987	dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__);
		988	return -ENODEV;
		989	}
		990
		991	/* if this device type has a probe function, call it */
		992	if (type->probe) {
		993	if (!try_module_get(type->owner)) {
		994	dev_err(&interface->dev, "module get failed, exiting\n");
		995	kfree (serial);
		996	return -EIO;
		997	}
		998	retval = type->probe (serial, id_pattern);
		999	module_put(type->owner);
		1000
		1001	if (retval) {
		1002	dbg ("sub driver rejected device");
		1003	kfree (serial);
		1004	return retval;
		1005	}
		1006	}
		1007
		1008	/* descriptor matches, let's find the endpoints needed */
		1009	/* check out the endpoints */
		1010	iface_desc = &interface->altsetting[0];
		1011	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		1012	endpoint = &iface_desc->endpoint[i].desc;
		1013
		1014	if ((endpoint->bEndpointAddress & 0x80) &&
		1015	((endpoint->bmAttributes & 3) == 0x02)) {
		1016	/* we found a bulk in endpoint */
		1017	dbg("found bulk in");
		1018	bulk_in_endpoint[num_bulk_in] = endpoint;
		1019	++num_bulk_in;
		1020	}
		1021
		1022	if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
		1023	((endpoint->bmAttributes & 3) == 0x02)) {
		1024	/* we found a bulk out endpoint */
		1025	dbg("found bulk out");
		1026	bulk_out_endpoint[num_bulk_out] = endpoint;
		1027	++num_bulk_out;
		1028	}
		1029
		1030	if ((endpoint->bEndpointAddress & 0x80) &&
		1031	((endpoint->bmAttributes & 3) == 0x03)) {
		1032	/* we found a interrupt in endpoint */
		1033	dbg("found interrupt in");
		1034	interrupt_in_endpoint[num_interrupt_in] = endpoint;
		1035	++num_interrupt_in;
		1036	}
		1037	}
		1038
		1039	#if defined(CONFIG_USB_SERIAL_PL2303) \|\| defined(CONFIG_USB_SERIAL_PL2303_MODULE)
		1040	/* BEGIN HORRIBLE HACK FOR PL2303 */
		1041	/* this is needed due to the looney way its endpoints are set up */
		1042	if (((dev->descriptor.idVendor == PL2303_VENDOR_ID) &&
		1043	(dev->descriptor.idProduct == PL2303_PRODUCT_ID)) \|\|
		1044	((dev->descriptor.idVendor == ATEN_VENDOR_ID) &&
		1045	(dev->descriptor.idProduct == ATEN_PRODUCT_ID))) {
		1046	if (interface != dev->actconfig->interface[0]) {
		1047	/* check out the endpoints of the other interface*/
		1048	iface_desc = &dev->actconfig->interface[0]->altsetting[0];
		1049	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
		1050	endpoint = &iface_desc->endpoint[i].desc;
		1051	if ((endpoint->bEndpointAddress & 0x80) &&
		1052	((endpoint->bmAttributes & 3) == 0x03)) {
		1053	/* we found a interrupt in endpoint */
		1054	dbg("found interrupt in for Prolific device on separate interface");
		1055	interrupt_in_endpoint[num_interrupt_in] = endpoint;
		1056	++num_interrupt_in;
		1057	}
		1058	}
		1059	}
		1060
		1061	/* Now make sure the PL-2303 is configured correctly.
		1062	* If not, give up now and hope this hack will work
		1063	* properly during a later invocation of usb_serial_probe
		1064	*/
		1065	if (num_bulk_in == 0 \|\| num_bulk_out == 0) {
		1066	dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n");
		1067	kfree (serial);
		1068	return -ENODEV;
		1069	}
		1070	}
		1071	/* END HORRIBLE HACK FOR PL2303 */
		1072	#endif
		1073
		1074	/* found all that we need */
		1075	dev_info(&interface->dev, "%s converter detected\n", type->name);
		1076
		1077	#ifdef CONFIG_USB_SERIAL_GENERIC
		1078	if (type == &usb_serial_generic_device) {
		1079	num_ports = num_bulk_out;
		1080	if (num_ports == 0) {
		1081	dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n");
		1082	kfree (serial);
		1083	return -EIO;
		1084	}
		1085	}
		1086	#endif
		1087	if (!num_ports) {
		1088	/* if this device type has a calc_num_ports function, call it */
		1089	if (type->calc_num_ports) {
		1090	if (!try_module_get(type->owner)) {
		1091	dev_err(&interface->dev, "module get failed, exiting\n");
		1092	kfree (serial);
		1093	return -EIO;
		1094	}
		1095	num_ports = type->calc_num_ports (serial);
		1096	module_put(type->owner);
		1097	}
		1098	if (!num_ports)
		1099	num_ports = type->num_ports;
		1100	}
		1101
		1102	if (get_free_serial (serial, num_ports, &minor) == NULL) {
		1103	dev_err(&interface->dev, "No more free serial devices\n");
		1104	kfree (serial);
		1105	return -ENOMEM;
		1106	}
		1107
		1108	serial->minor = minor;
		1109	serial->num_ports = num_ports;
		1110	serial->num_bulk_in = num_bulk_in;
		1111	serial->num_bulk_out = num_bulk_out;
		1112	serial->num_interrupt_in = num_interrupt_in;
		1113
		1114	/* create our ports, we need as many as the max endpoints */
		1115	/* we don't use num_ports here cauz some devices have more endpoint pairs than ports */
		1116	max_endpoints = max(num_bulk_in, num_bulk_out);
		1117	max_endpoints = max(max_endpoints, num_interrupt_in);
		1118	max_endpoints = max(max_endpoints, (int)serial->num_ports);
		1119	serial->num_port_pointers = max_endpoints;
		1120	dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints);
		1121	for (i = 0; i < max_endpoints; ++i) {
		1122	port = kmalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
		1123	if (!port)
		1124	goto probe_error;
		1125	memset(port, 0x00, sizeof(struct usb_serial_port));
		1126	port->number = i + serial->minor;
		1127	port->serial = serial;
		1128	port->magic = USB_SERIAL_PORT_MAGIC;
		1129	INIT_WORK(&port->work, usb_serial_port_softint, port);
		1130	serial->port[i] = port;
		1131	}
		1132
		1133	/* set up the endpoint information */
		1134	for (i = 0; i < num_bulk_in; ++i) {
		1135	endpoint = bulk_in_endpoint[i];
		1136	port = serial->port[i];
		1137	port->read_urb = usb_alloc_urb (0, GFP_KERNEL);
		1138	if (!port->read_urb) {
		1139	dev_err(&interface->dev, "No free urbs available\n");
		1140	goto probe_error;
		1141	}
		1142	buffer_size = endpoint->wMaxPacketSize;
		1143
		1144	port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
		1145	port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
		1146	if (!port->bulk_in_buffer) {
		1147	dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n");
		1148	goto probe_error;
		1149	}
		1150	usb_fill_bulk_urb (port->read_urb, dev,
		1151	usb_rcvbulkpipe (dev,
		1152	endpoint->bEndpointAddress),
		1153	port->bulk_in_buffer, buffer_size,
		1154	serial->type->read_bulk_callback,
		1155	port);
		1156	}
		1157
		1158	for (i = 0; i < num_bulk_out; ++i) {
		1159	endpoint = bulk_out_endpoint[i];
		1160	port = serial->port[i];
		1161	port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
		1162	if (!port->write_urb) {
		1163	dev_err(&interface->dev, "No free urbs available\n");
		1164	goto probe_error;
		1165	}
		1166	buffer_size = endpoint->wMaxPacketSize;
		1167	port->bulk_out_size = buffer_size;
		1168	port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
		1169	port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL);
		1170	if (!port->bulk_out_buffer) {
		1171	dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n");
		1172	goto probe_error;
		1173	}
		1174	usb_fill_bulk_urb (port->write_urb, dev,
		1175	usb_sndbulkpipe (dev,
		1176	endpoint->bEndpointAddress),
		1177	port->bulk_out_buffer, buffer_size,
		1178	serial->type->write_bulk_callback,
		1179	port);
		1180	}
		1181
		1182	for (i = 0; i < num_interrupt_in; ++i) {
		1183	endpoint = interrupt_in_endpoint[i];
		1184	port = serial->port[i];
		1185	port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
		1186	if (!port->interrupt_in_urb) {
		1187	dev_err(&interface->dev, "No free urbs available\n");
		1188	goto probe_error;
		1189	}
		1190	buffer_size = endpoint->wMaxPacketSize;
		1191	port->interrupt_in_endpointAddress = endpoint->bEndpointAddress;
		1192	port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
		1193	if (!port->interrupt_in_buffer) {
		1194	dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n");
		1195	goto probe_error;
		1196	}
		1197	usb_fill_int_urb (port->interrupt_in_urb, dev,
		1198	usb_rcvintpipe (dev,
		1199	endpoint->bEndpointAddress),
		1200	port->interrupt_in_buffer, buffer_size,
		1201	serial->type->read_int_callback, port,
		1202	endpoint->bInterval);
		1203	}
		1204
		1205	/* if this device type has an attach function, call it */
		1206	if (type->attach) {
		1207	if (!try_module_get(type->owner)) {
		1208	dev_err(&interface->dev, "module get failed, exiting\n");
		1209	goto probe_error;
		1210	}
		1211	retval = type->attach (serial);
		1212	module_put(type->owner);
		1213	if (retval < 0)
		1214	goto probe_error;
		1215	if (retval > 0) {
		1216	/* quietly accept this device, but don't bind to a serial port
		1217	* as it's about to disappear */
		1218	goto exit;
		1219	}
		1220	}
		1221
		1222	/* register all of the individual ports with the driver core */
		1223	for (i = 0; i < num_ports; ++i) {
		1224	port = serial->port[i];
		1225	port->dev.parent = &interface->dev;
		1226	port->dev.driver = NULL;
		1227	port->dev.bus = &usb_serial_bus_type;
		1228	port->dev.release = &port_release;
		1229
		1230	snprintf26(&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number);
		1231	dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id);
		1232	device_register (&port->dev);
		1233	}
		1234
		1235	usb_serial_console_init (debug, minor);
		1236
		1237	exit:
		1238	/* success */
		1239	usb_set_intfdata (interface, serial);
		1240	return 0;
		1241
		1242	probe_error:
		1243	for (i = 0; i < num_bulk_in; ++i) {
		1244	port = serial->port[i];
		1245	if (!port)
		1246	continue;
		1247	if (port->read_urb)
		1248	usb_free_urb (port->read_urb);
		1249	kfree(port->bulk_in_buffer);
		1250	}
		1251	for (i = 0; i < num_bulk_out; ++i) {
		1252	port = serial->port[i];
		1253	if (!port)
		1254	continue;
		1255	if (port->write_urb)
		1256	usb_free_urb (port->write_urb);
		1257	kfree(port->bulk_out_buffer);
		1258	}
		1259	for (i = 0; i < num_interrupt_in; ++i) {
		1260	port = serial->port[i];
		1261	if (!port)
		1262	continue;
		1263	if (port->interrupt_in_urb)
		1264	usb_free_urb (port->interrupt_in_urb);
		1265	kfree(port->interrupt_in_buffer);
		1266	}
		1267
		1268	/* return the minor range that this device had */
		1269	return_serial (serial);
		1270
		1271	/* free up any memory that we allocated */
		1272	for (i = 0; i < serial->num_port_pointers; ++i)
		1273	kfree(serial->port[i]);
		1274	kfree (serial);
		1275	return -EIO;
		1276	}
		1277
		1278	void usb_serial_disconnect(struct usb_interface *interface)
		1279	{
		1280	struct usb_serial *serial = usb_get_intfdata (interface);
		1281	struct device *dev = &interface->dev;
		1282
		1283	dbg ("%s", __FUNCTION__);
		1284
		1285	usb_set_intfdata (interface, NULL);
		1286	if (serial) {
		1287	/* let the last holder of this object
		1288	* cause it to be cleaned up */
		1289	kobject_put (&serial->kobj);
		1290	}
		1291	dev_info(dev, "device disconnected\n");
		1292	}
		1293
		1294	static struct tty_operations serial_ops = {
		1295	.open = serial_open,
		1296	.close = serial_close,
		1297	.write = serial_write,
		1298	.write_room = serial_write_room,
		1299	.ioctl = serial_ioctl,
		1300	.set_termios = serial_set_termios,
		1301	.throttle = serial_throttle,
		1302	.unthrottle = serial_unthrottle,
		1303	.break_ctl = serial_break,
		1304	.chars_in_buffer = serial_chars_in_buffer,
		1305	.read_proc = serial_read_proc,
		1306	.tiocmget = serial_tiocmget,
		1307	.tiocmset = serial_tiocmset,
		1308	};
		1309
		1310	struct tty_driver *usb_serial_tty_driver;
		1311
		1312	/static/ int __init usb_serial_init(void)
		1313	{
		1314	int i;
		1315	int result = 0;
		1316
		1317	usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS);
		1318	if (!usb_serial_tty_driver)
		1319	return -ENOMEM;
		1320
		1321	/* Initialize our global data */
		1322	for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
		1323	serial_table[i] = NULL;
		1324	}
		1325
		1326	bus_register(&usb_serial_bus_type);
		1327
		1328	/* register the generic driver, if we should */
		1329	result = usb_serial_generic_register(debug);
		1330	if (result < 0) {
		1331	err("%s - registering generic driver failed", __FUNCTION__);
		1332	goto exit;
		1333	}
		1334
		1335	usb_serial_tty_driver->owner = THIS_MODULE;
		1336	usb_serial_tty_driver->driver_name = "usbserial";
		1337	usb_serial_tty_driver->devfs_name = "usb/tts/";
		1338	usb_serial_tty_driver->name = "ttyUSB";
		1339	usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
		1340	usb_serial_tty_driver->minor_start = 0;
		1341	usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
		1342	usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
		1343	usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW \| TTY_DRIVER_NO_DEVFS;
		1344	usb_serial_tty_driver->init_termios = tty_std_termios;
		1345	usb_serial_tty_driver->init_termios.c_cflag = B9600 \| CS8 \| CREAD \| HUPCL \| CLOCAL;
		1346	tty_set_operations(usb_serial_tty_driver, &serial_ops);
		1347	result = tty_register_driver(usb_serial_tty_driver);
		1348	if (result) {
		1349	err("%s - tty_register_driver failed", __FUNCTION__);
		1350	goto exit_generic;
		1351	}
		1352
		1353	/* register the USB driver */
		1354	result = usb_register(&usb_serial_driver);
		1355	if (result < 0) {
		1356	err("%s - usb_register failed", __FUNCTION__);
		1357	goto exit_tty;
		1358	}
		1359
		1360	info(DRIVER_DESC " " DRIVER_VERSION);
		1361
		1362	return result;
		1363
		1364	exit_tty:
		1365	tty_unregister_driver(usb_serial_tty_driver);
		1366
		1367	exit_generic:
		1368	usb_serial_generic_deregister();
		1369
		1370	exit:
		1371	err ("%s - returning with error %d", __FUNCTION__, result);
		1372	put_tty_driver(usb_serial_tty_driver);
		1373	return result;
		1374	}
		1375
		1376
		1377	/static/ void __exit usb_serial_exit(void)
		1378	{
		1379	usb_serial_console_exit();
		1380
		1381	usb_serial_generic_deregister();
		1382
		1383	usb_deregister(&usb_serial_driver);
		1384	tty_unregister_driver(usb_serial_tty_driver);
		1385	put_tty_driver(usb_serial_tty_driver);
		1386	bus_unregister(&usb_serial_bus_type);
		1387	}
		1388
		1389
		1390	module_init(usb_serial_init);
		1391	module_exit(usb_serial_exit);
		1392
		1393	#define set_to_generic_if_null(type, function) \
		1394	do { \
		1395	if (!type->function) { \
		1396	type->function = usb_serial_generic_##function; \
		1397	dbg("Had to override the " #function \
		1398	" usb serial operation with the generic one.");\
		1399	} \
		1400	} while (0)
		1401
		1402	static void fixup_generic(struct usb_serial_device_type *device)
		1403	{
		1404	set_to_generic_if_null(device, open);
		1405	set_to_generic_if_null(device, write);
		1406	set_to_generic_if_null(device, close);
		1407	set_to_generic_if_null(device, write_room);
		1408	set_to_generic_if_null(device, chars_in_buffer);
		1409	set_to_generic_if_null(device, read_bulk_callback);
		1410	set_to_generic_if_null(device, write_bulk_callback);
		1411	set_to_generic_if_null(device, shutdown);
		1412	}
		1413
		1414	int usb_serial_register(struct usb_serial_device_type *new_device)
		1415	{
		1416	int retval;
		1417
		1418	fixup_generic(new_device);
		1419
		1420	/* Add this device to our list of devices */
		1421	list_add(&new_device->driver_list, &usb_serial_driver_list);
		1422
		1423	retval = usb_serial_bus_register (new_device);
		1424
		1425	if (retval)
		1426	goto error;
		1427
		1428	info("USB Serial support registered for %s", new_device->name);
		1429
		1430	return retval;
		1431	error:
		1432	err("problem %d when registering driver %s", retval, new_device->name);
		1433	list_del(&new_device->driver_list);
		1434
		1435	return retval;
		1436	}
		1437
		1438
		1439	void usb_serial_deregister(struct usb_serial_device_type *device)
		1440	{
		1441	struct usb_serial *serial;
		1442	int i;
		1443
		1444	info("USB Serial deregistering driver %s", device->name);
		1445
		1446	/* clear out the serial_table if the device is attached to a port */
		1447	for(i = 0; i < SERIAL_TTY_MINORS; ++i) {
		1448	serial = serial_table[i];
		1449	if ((serial != NULL) && (serial->type == device)) {
		1450	usb_driver_release_interface (&usb_serial_driver, serial->interface);
		1451	usb_serial_disconnect (serial->interface);
		1452	}
		1453	}
		1454
		1455	list_del(&device->driver_list);
		1456	usb_serial_bus_deregister (device);
		1457	}
		1458
		1459
		1460
		1461	/* If the usb-serial core is built into the core, the usb-serial drivers
		1462	need these symbols to load properly as modules. */
		1463	EXPORT_SYMBOL(usb_serial_register);
		1464	EXPORT_SYMBOL(usb_serial_deregister);
		1465	EXPORT_SYMBOL(usb_serial_probe);
		1466	EXPORT_SYMBOL(usb_serial_disconnect);
		1467	EXPORT_SYMBOL(usb_serial_port_softint);
		1468
		1469
		1470	/* Module information */
		1471	MODULE_AUTHOR( DRIVER_AUTHOR );
		1472	MODULE_DESCRIPTION( DRIVER_DESC );
		1473	MODULE_LICENSE("GPL");
		1474
		1475	MODULE_PARM(debug, "i");
		1476	MODULE_PARM_DESC(debug, "Debug enabled or not");

Subversion Repositories shark

(root)/shark/trunk/drivers/usb/serial/usb-serial.c - Rev 846