mirror of
https://github.com/torvalds/linux.git
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1436 lines
43 KiB
C
1436 lines
43 KiB
C
/*
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* USB Serial Converter driver
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*
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* Copyright (C) 1999 - 2004 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2000 Peter Berger (pberger@brimson.com)
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* Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This driver was originally based on the ACM driver by Armin Fuerst (which was
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* based on a driver by Brad Keryan)
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*
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* See Documentation/usb/usb-serial.txt for more information on using this driver
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*
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* (12/10/2002) gkh
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* Split the ports off into their own struct device, and added a
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* usb-serial bus driver.
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*
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* (11/19/2002) gkh
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* removed a few #ifdefs for the generic code and cleaned up the failure
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* logic in initialization.
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*
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* (10/02/2002) gkh
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* moved the console code to console.c and out of this file.
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*
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* (06/05/2002) gkh
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* moved location of startup() call in serial_probe() until after all
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* of the port information and endpoints are initialized. This makes
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* things easier for some drivers.
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*
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* (04/10/2002) gkh
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* added serial_read_proc function which creates a
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* /proc/tty/driver/usb-serial file.
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*
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* (03/27/2002) gkh
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* Got USB serial console code working properly and merged into the main
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* version of the tree. Thanks to Randy Dunlap for the initial version
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* of this code, and for pushing me to finish it up.
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* The USB serial console works with any usb serial driver device.
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*
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* (03/21/2002) gkh
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* Moved all manipulation of port->open_count into the core. Now the
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* individual driver's open and close functions are called only when the
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* first open() and last close() is called. Making the drivers a bit
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* smaller and simpler.
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* Fixed a bug if a driver didn't have the owner field set.
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*
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* (02/26/2002) gkh
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* Moved all locking into the main serial_* functions, instead of having
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* the individual drivers have to grab the port semaphore. This should
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* reduce races.
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* Reworked the MOD_INC logic a bit to always increment and decrement, even
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* if the generic driver is being used.
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*
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* (10/10/2001) gkh
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* usb_serial_disconnect() now sets the serial->dev pointer is to NULL to
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* help prevent child drivers from accessing the device since it is now
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* gone.
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*
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* (09/13/2001) gkh
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* Moved generic driver initialize after we have registered with the USB
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* core. Thanks to Randy Dunlap for pointing this problem out.
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*
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* (07/03/2001) gkh
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* Fixed module paramater size. Thanks to John Brockmeyer for the pointer.
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* Fixed vendor and product getting defined through the MODULE_PARM macro
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* if the Generic driver wasn't compiled in.
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* Fixed problem with generic_shutdown() not being called for drivers that
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* don't have a shutdown() function.
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*
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* (06/06/2001) gkh
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* added evil hack that is needed for the prolific pl2303 device due to the
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* crazy way its endpoints are set up.
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*
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* (05/30/2001) gkh
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* switched from using spinlock to a semaphore, which fixes lots of problems.
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*
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* (04/08/2001) gb
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* Identify version on module load.
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*
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* 2001_02_05 gkh
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* Fixed buffer overflows bug with the generic serial driver. Thanks to
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* Todd Squires <squirest@ct0.com> for fixing this.
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*
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* (01/10/2001) gkh
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* Fixed bug where the generic serial adaptor grabbed _any_ device that was
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* offered to it.
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*
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* (12/12/2000) gkh
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* Removed MOD_INC and MOD_DEC from poll and disconnect functions, and
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* moved them to the serial_open and serial_close functions.
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* Also fixed bug with there not being a MOD_DEC for the generic driver
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* (thanks to Gary Brubaker for finding this.)
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*
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* (11/29/2000) gkh
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* Small NULL pointer initialization cleanup which saves a bit of disk image
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*
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* (11/01/2000) Adam J. Richter
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* instead of using idVendor/idProduct pairs, usb serial drivers
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* now identify their hardware interest with usb_device_id tables,
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* which they usually have anyhow for use with MODULE_DEVICE_TABLE.
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*
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* (10/05/2000) gkh
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* Fixed bug with urb->dev not being set properly, now that the usb
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* core needs it.
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*
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* (09/11/2000) gkh
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* Removed DEBUG #ifdefs with call to usb_serial_debug_data
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*
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* (08/28/2000) gkh
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* Added port_lock to port structure.
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* Added locks for SMP safeness to generic driver
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* Fixed the ability to open a generic device's port more than once.
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*
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* (07/23/2000) gkh
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* Added bulk_out_endpointAddress to port structure.
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*
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* (07/19/2000) gkh, pberger, and borchers
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* Modifications to allow usb-serial drivers to be modules.
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*
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* (07/03/2000) gkh
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* Added more debugging to serial_ioctl call
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*
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* (06/25/2000) gkh
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* Changed generic_write_bulk_callback to not call wake_up_interruptible
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* directly, but to have port_softint do it at a safer time.
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*
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* (06/23/2000) gkh
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* Cleaned up debugging statements in a quest to find UHCI timeout bug.
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*
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* (05/22/2000) gkh
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* Changed the makefile, enabling the big CONFIG_USB_SERIAL_SOMTHING to be
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* removed from the individual device source files.
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*
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* (05/03/2000) gkh
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* Added the Digi Acceleport driver from Al Borchers and Peter Berger.
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*
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* (05/02/2000) gkh
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* Changed devfs and tty register code to work properly now. This was based on
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* the ACM driver changes by Vojtech Pavlik.
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*
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* (04/27/2000) Ryan VanderBijl
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* Put calls to *_paranoia_checks into one function.
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*
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* (04/23/2000) gkh
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* Fixed bug that Randy Dunlap found for Generic devices with no bulk out ports.
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* Moved when the startup code printed out the devices that are supported.
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*
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* (04/19/2000) gkh
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* Added driver for ZyXEL omni.net lcd plus ISDN TA
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* Made startup info message specify which drivers were compiled in.
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*
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* (04/03/2000) gkh
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* Changed the probe process to remove the module unload races.
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* Changed where the tty layer gets initialized to have devfs work nicer.
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* Added initial devfs support.
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*
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* (03/26/2000) gkh
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* Split driver up into device specific pieces.
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*
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* (03/19/2000) gkh
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* Fixed oops that could happen when device was removed while a program
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* was talking to the device.
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* Removed the static urbs and now all urbs are created and destroyed
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* dynamically.
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* Reworked the internal interface. Now everything is based on the
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* usb_serial_port structure instead of the larger usb_serial structure.
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* This fixes the bug that a multiport device could not have more than
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* one port open at one time.
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*
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* (03/17/2000) gkh
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* Added config option for debugging messages.
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* Added patch for keyspan pda from Brian Warner.
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*
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* (03/06/2000) gkh
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* Added the keyspan pda code from Brian Warner <warner@lothar.com>
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* Moved a bunch of the port specific stuff into its own structure. This
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* is in anticipation of the true multiport devices (there's a bug if you
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* try to access more than one port of any multiport device right now)
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*
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* (02/21/2000) gkh
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* Made it so that any serial devices only have to specify which functions
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* they want to overload from the generic function calls (great,
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* inheritance in C, in a driver, just what I wanted...)
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* Added support for set_termios and ioctl function calls. No drivers take
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* advantage of this yet.
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* Removed the #ifdef MODULE, now there is no module specific code.
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* Cleaned up a few comments in usb-serial.h that were wrong (thanks again
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* to Miles Lott).
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* Small fix to get_free_serial.
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*
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* (02/14/2000) gkh
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* Removed the Belkin and Peracom functionality from the driver due to
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* the lack of support from the vendor, and me not wanting people to
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* accidenatly buy the device, expecting it to work with Linux.
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* Added read_bulk_callback and write_bulk_callback to the type structure
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* for the needs of the FTDI and WhiteHEAT driver.
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* Changed all reverences to FTDI to FTDI_SIO at the request of Bill
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* Ryder.
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* Changed the output urb size back to the max endpoint size to make
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* the ftdi_sio driver have it easier, and due to the fact that it didn't
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* really increase the speed any.
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*
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* (02/11/2000) gkh
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* Added VISOR_FUNCTION_CONSOLE to the visor startup function. This was a
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* patch from Miles Lott (milos@insync.net).
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* Fixed bug with not restoring the minor range that a device grabs, if
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* the startup function fails (thanks Miles for finding this).
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*
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* (02/05/2000) gkh
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* Added initial framework for the Keyspan PDA serial converter so that
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* Brian Warner has a place to put his code.
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* Made the ezusb specific functions generic enough that different
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* devices can use them (whiteheat and keyspan_pda both need them).
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* Split out a whole bunch of structure and other stuff to a separate
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* usb-serial.h file.
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* Made the Visor connection messages a little more understandable, now
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* that Miles Lott (milos@insync.net) has gotten the Generic channel to
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* work. Also made them always show up in the log file.
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*
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* (01/25/2000) gkh
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* Added initial framework for FTDI serial converter so that Bill Ryder
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* has a place to put his code.
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* Added the vendor specific info from Handspring. Now we can print out
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* informational debug messages as well as understand what is happening.
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*
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* (01/23/2000) gkh
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* Fixed problem of crash when trying to open a port that didn't have a
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* device assigned to it. Made the minor node finding a little smarter,
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* now it looks to find a continuous space for the new device.
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*
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* (01/21/2000) gkh
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* Fixed bug in visor_startup with patch from Miles Lott (milos@insync.net)
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* Fixed get_serial_by_minor which was all messed up for multi port
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* devices. Fixed multi port problem for generic devices. Now the number
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* of ports is determined by the number of bulk out endpoints for the
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* generic device.
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*
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* (01/19/2000) gkh
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* Removed lots of cruft that was around from the old (pre urb) driver
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* interface.
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* Made the serial_table dynamic. This should save lots of memory when
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* the number of minor nodes goes up to 256.
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* Added initial support for devices that have more than one port.
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* Added more debugging comments for the Visor, and added a needed
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* set_configuration call.
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*
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* (01/17/2000) gkh
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* Fixed the WhiteHEAT firmware (my processing tool had a bug)
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* and added new debug loader firmware for it.
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* Removed the put_char function as it isn't really needed.
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* Added visor startup commands as found by the Win98 dump.
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*
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* (01/13/2000) gkh
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* Fixed the vendor id for the generic driver to the one I meant it to be.
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*
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* (01/12/2000) gkh
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* Forget the version numbering...that's pretty useless...
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* Made the driver able to be compiled so that the user can select which
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* converter they want to use. This allows people who only want the Visor
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* support to not pay the memory size price of the WhiteHEAT.
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* Fixed bug where the generic driver (idVendor=0000 and idProduct=0000)
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* grabbed the root hub. Not good.
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*
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* version 0.4.0 (01/10/2000) gkh
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* Added whiteheat.h containing the firmware for the ConnectTech WhiteHEAT
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* device. Added startup function to allow firmware to be downloaded to
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* a device if it needs to be.
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* Added firmware download logic to the WhiteHEAT device.
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* Started to add #defines to split up the different drivers for potential
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* configuration option.
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*
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* version 0.3.1 (12/30/99) gkh
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* Fixed problems with urb for bulk out.
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* Added initial support for multiple sets of endpoints. This enables
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* the Handspring Visor to be attached successfully. Only the first
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* bulk in / bulk out endpoint pair is being used right now.
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*
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* version 0.3.0 (12/27/99) gkh
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* Added initial support for the Handspring Visor based on a patch from
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* Miles Lott (milos@sneety.insync.net)
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* Cleaned up the code a bunch and converted over to using urbs only.
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*
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* version 0.2.3 (12/21/99) gkh
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* Added initial support for the Connect Tech WhiteHEAT converter.
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* Incremented the number of ports in expectation of getting the
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* WhiteHEAT to work properly (4 ports per connection).
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* Added notification on insertion and removal of what port the
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* device is/was connected to (and what kind of device it was).
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*
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* version 0.2.2 (12/16/99) gkh
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* Changed major number to the new allocated number. We're legal now!
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*
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* version 0.2.1 (12/14/99) gkh
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* Fixed bug that happens when device node is opened when there isn't a
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* device attached to it. Thanks to marek@webdesign.no for noticing this.
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*
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* version 0.2.0 (11/10/99) gkh
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* Split up internals to make it easier to add different types of serial
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* converters to the code.
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* Added a "generic" driver that gets it's vendor and product id
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* from when the module is loaded. Thanks to David E. Nelson (dnelson@jump.net)
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* for the idea and sample code (from the usb scanner driver.)
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* Cleared up any licensing questions by releasing it under the GNU GPL.
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*
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* version 0.1.2 (10/25/99) gkh
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* Fixed bug in detecting device.
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*
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* version 0.1.1 (10/05/99) gkh
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* Changed the major number to not conflict with anything else.
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*
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* version 0.1 (09/28/99) gkh
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* Can recognize the two different devices and start up a read from
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* device when asked to. Writes also work. No control signals yet, this
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* all is vendor specific data (i.e. no spec), also no control for
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* different baud rates or other bit settings.
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* Currently we are using the same devid as the acm driver. This needs
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* to change.
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/smp_lock.h>
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#include <asm/uaccess.h>
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#include <linux/usb.h>
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#include "usb-serial.h"
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#include "pl2303.h"
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v2.0"
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#define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/"
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#define DRIVER_DESC "USB Serial Driver core"
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/* Driver structure we register with the USB core */
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static struct usb_driver usb_serial_driver = {
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.owner = THIS_MODULE,
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.name = "usbserial",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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};
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/* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead
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the MODULE_DEVICE_TABLE declarations in each serial driver
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cause the "hotplug" program to pull in whatever module is necessary
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via modprobe, and modprobe will load usbserial because the serial
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drivers depend on it.
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*/
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static int debug;
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static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; /* initially all NULL */
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static LIST_HEAD(usb_serial_driver_list);
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struct usb_serial *usb_serial_get_by_index(unsigned index)
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{
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struct usb_serial *serial = serial_table[index];
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if (serial)
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kref_get(&serial->kref);
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return serial;
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}
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static struct usb_serial *get_free_serial (struct usb_serial *serial, int num_ports, unsigned int *minor)
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{
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unsigned int i, j;
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int good_spot;
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dbg("%s %d", __FUNCTION__, num_ports);
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*minor = 0;
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for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
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if (serial_table[i])
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continue;
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good_spot = 1;
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for (j = 1; j <= num_ports-1; ++j)
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if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) {
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good_spot = 0;
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i += j;
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break;
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}
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if (good_spot == 0)
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continue;
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*minor = i;
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dbg("%s - minor base = %d", __FUNCTION__, *minor);
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for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i)
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serial_table[i] = serial;
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return serial;
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}
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return NULL;
|
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}
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|
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static void return_serial(struct usb_serial *serial)
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{
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int i;
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|
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dbg("%s", __FUNCTION__);
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|
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if (serial == NULL)
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return;
|
|
|
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for (i = 0; i < serial->num_ports; ++i) {
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serial_table[serial->minor + i] = NULL;
|
|
}
|
|
}
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|
|
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static void destroy_serial(struct kref *kref)
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{
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struct usb_serial *serial;
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struct usb_serial_port *port;
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int i;
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serial = to_usb_serial(kref);
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|
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dbg ("%s - %s", __FUNCTION__, serial->type->name);
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serial->type->shutdown(serial);
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|
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/* return the minor range that this device had */
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return_serial(serial);
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for (i = 0; i < serial->num_ports; ++i)
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serial->port[i]->open_count = 0;
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|
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/* the ports are cleaned up and released in port_release() */
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for (i = 0; i < serial->num_ports; ++i)
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if (serial->port[i]->dev.parent != NULL) {
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device_unregister(&serial->port[i]->dev);
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serial->port[i] = NULL;
|
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}
|
|
|
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/* If this is a "fake" port, we have to clean it up here, as it will
|
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* not get cleaned up in port_release() as it was never registered with
|
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* the driver core */
|
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if (serial->num_ports < serial->num_port_pointers) {
|
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for (i = serial->num_ports; i < serial->num_port_pointers; ++i) {
|
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port = serial->port[i];
|
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if (!port)
|
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continue;
|
|
usb_kill_urb(port->read_urb);
|
|
usb_free_urb(port->read_urb);
|
|
usb_kill_urb(port->write_urb);
|
|
usb_free_urb(port->write_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
usb_free_urb(port->interrupt_in_urb);
|
|
usb_kill_urb(port->interrupt_out_urb);
|
|
usb_free_urb(port->interrupt_out_urb);
|
|
kfree(port->bulk_in_buffer);
|
|
kfree(port->bulk_out_buffer);
|
|
kfree(port->interrupt_in_buffer);
|
|
kfree(port->interrupt_out_buffer);
|
|
}
|
|
}
|
|
|
|
usb_put_dev(serial->dev);
|
|
|
|
/* free up any memory that we allocated */
|
|
kfree (serial);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Driver tty interface functions
|
|
*****************************************************************************/
|
|
static int serial_open (struct tty_struct *tty, struct file * filp)
|
|
{
|
|
struct usb_serial *serial;
|
|
struct usb_serial_port *port;
|
|
unsigned int portNumber;
|
|
int retval;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
/* get the serial object associated with this tty pointer */
|
|
serial = usb_serial_get_by_index(tty->index);
|
|
if (!serial) {
|
|
tty->driver_data = NULL;
|
|
return -ENODEV;
|
|
}
|
|
|
|
portNumber = tty->index - serial->minor;
|
|
port = serial->port[portNumber];
|
|
|
|
++port->open_count;
|
|
|
|
if (port->open_count == 1) {
|
|
|
|
/* set up our port structure making the tty driver
|
|
* remember our port object, and us it */
|
|
tty->driver_data = port;
|
|
port->tty = tty;
|
|
|
|
/* lock this module before we call it
|
|
* this may fail, which means we must bail out,
|
|
* safe because we are called with BKL held */
|
|
if (!try_module_get(serial->type->owner)) {
|
|
retval = -ENODEV;
|
|
goto bailout_kref_put;
|
|
}
|
|
|
|
/* only call the device specific open if this
|
|
* is the first time the port is opened */
|
|
retval = serial->type->open(port, filp);
|
|
if (retval)
|
|
goto bailout_module_put;
|
|
}
|
|
|
|
return 0;
|
|
|
|
bailout_module_put:
|
|
module_put(serial->type->owner);
|
|
bailout_kref_put:
|
|
kref_put(&serial->kref, destroy_serial);
|
|
port->open_count = 0;
|
|
return retval;
|
|
}
|
|
|
|
static void serial_close(struct tty_struct *tty, struct file * filp)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
|
|
if (!port)
|
|
return;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (port->open_count == 0)
|
|
return;
|
|
|
|
--port->open_count;
|
|
if (port->open_count == 0) {
|
|
/* only call the device specific close if this
|
|
* port is being closed by the last owner */
|
|
port->serial->type->close(port, filp);
|
|
|
|
if (port->tty) {
|
|
if (port->tty->driver_data)
|
|
port->tty->driver_data = NULL;
|
|
port->tty = NULL;
|
|
}
|
|
|
|
module_put(port->serial->type->owner);
|
|
}
|
|
|
|
kref_put(&port->serial->kref, destroy_serial);
|
|
}
|
|
|
|
static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
int retval = -EINVAL;
|
|
|
|
dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not opened", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
retval = port->serial->type->write(port, buf, count);
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static int serial_write_room (struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
int retval = -EINVAL;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
retval = port->serial->type->write_room(port);
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static int serial_chars_in_buffer (struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
int retval = -EINVAL;
|
|
|
|
dbg("%s = port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
retval = port->serial->type->chars_in_buffer(port);
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static void serial_throttle (struct tty_struct * tty)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg ("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
if (port->serial->type->throttle)
|
|
port->serial->type->throttle(port);
|
|
}
|
|
|
|
static void serial_unthrottle (struct tty_struct * tty)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function */
|
|
if (port->serial->type->unthrottle)
|
|
port->serial->type->unthrottle(port);
|
|
}
|
|
|
|
static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
int retval = -ENODEV;
|
|
|
|
dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
|
|
|
|
if (!port->open_count) {
|
|
dbg ("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function if it is available */
|
|
if (port->serial->type->ioctl)
|
|
retval = port->serial->type->ioctl(port, file, cmd, arg);
|
|
else
|
|
retval = -ENOIOCTLCMD;
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static void serial_set_termios (struct tty_struct *tty, struct termios * old)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function if it is available */
|
|
if (port->serial->type->set_termios)
|
|
port->serial->type->set_termios(port, old);
|
|
}
|
|
|
|
static void serial_break (struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* pass on to the driver specific version of this function if it is available */
|
|
if (port->serial->type->break_ctl)
|
|
port->serial->type->break_ctl(port, break_state);
|
|
}
|
|
|
|
static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
|
|
{
|
|
struct usb_serial *serial;
|
|
int length = 0;
|
|
int i;
|
|
off_t begin = 0;
|
|
char tmp[40];
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
length += sprintf (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION);
|
|
for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
|
|
serial = usb_serial_get_by_index(i);
|
|
if (serial == NULL)
|
|
continue;
|
|
|
|
length += sprintf (page+length, "%d:", i);
|
|
if (serial->type->owner)
|
|
length += sprintf (page+length, " module:%s", module_name(serial->type->owner));
|
|
length += sprintf (page+length, " name:\"%s\"", serial->type->name);
|
|
length += sprintf (page+length, " vendor:%04x product:%04x",
|
|
le16_to_cpu(serial->dev->descriptor.idVendor),
|
|
le16_to_cpu(serial->dev->descriptor.idProduct));
|
|
length += sprintf (page+length, " num_ports:%d", serial->num_ports);
|
|
length += sprintf (page+length, " port:%d", i - serial->minor + 1);
|
|
|
|
usb_make_path(serial->dev, tmp, sizeof(tmp));
|
|
length += sprintf (page+length, " path:%s", tmp);
|
|
|
|
length += sprintf (page+length, "\n");
|
|
if ((length + begin) > (off + count))
|
|
goto done;
|
|
if ((length + begin) < off) {
|
|
begin += length;
|
|
length = 0;
|
|
}
|
|
kref_put(&serial->kref, destroy_serial);
|
|
}
|
|
*eof = 1;
|
|
done:
|
|
if (off >= (length + begin))
|
|
return 0;
|
|
*start = page + (off-begin);
|
|
return ((count < begin+length-off) ? count : begin+length-off);
|
|
}
|
|
|
|
static int serial_tiocmget (struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
if (port->serial->type->tiocmget)
|
|
return port->serial->type->tiocmget(port, file);
|
|
|
|
exit:
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int serial_tiocmset (struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port->open_count) {
|
|
dbg("%s - port not open", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
if (port->serial->type->tiocmset)
|
|
return port->serial->type->tiocmset(port, file, set, clear);
|
|
|
|
exit:
|
|
return -EINVAL;
|
|
}
|
|
|
|
void usb_serial_port_softint(void *private)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *)private;
|
|
struct tty_struct *tty;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (!port)
|
|
return;
|
|
|
|
tty = port->tty;
|
|
if (!tty)
|
|
return;
|
|
|
|
tty_wakeup(tty);
|
|
}
|
|
|
|
static void port_release(struct device *dev)
|
|
{
|
|
struct usb_serial_port *port = to_usb_serial_port(dev);
|
|
|
|
dbg ("%s - %s", __FUNCTION__, dev->bus_id);
|
|
usb_kill_urb(port->read_urb);
|
|
usb_free_urb(port->read_urb);
|
|
usb_kill_urb(port->write_urb);
|
|
usb_free_urb(port->write_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
usb_free_urb(port->interrupt_in_urb);
|
|
usb_kill_urb(port->interrupt_out_urb);
|
|
usb_free_urb(port->interrupt_out_urb);
|
|
kfree(port->bulk_in_buffer);
|
|
kfree(port->bulk_out_buffer);
|
|
kfree(port->interrupt_in_buffer);
|
|
kfree(port->interrupt_out_buffer);
|
|
kfree(port);
|
|
}
|
|
|
|
static struct usb_serial * create_serial (struct usb_device *dev,
|
|
struct usb_interface *interface,
|
|
struct usb_serial_device_type *type)
|
|
{
|
|
struct usb_serial *serial;
|
|
|
|
serial = kmalloc (sizeof (*serial), GFP_KERNEL);
|
|
if (!serial) {
|
|
dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
|
|
return NULL;
|
|
}
|
|
memset (serial, 0, sizeof(*serial));
|
|
serial->dev = usb_get_dev(dev);
|
|
serial->type = type;
|
|
serial->interface = interface;
|
|
kref_init(&serial->kref);
|
|
|
|
return serial;
|
|
}
|
|
|
|
static struct usb_serial_device_type *search_serial_device(struct usb_interface *iface)
|
|
{
|
|
struct list_head *p;
|
|
const struct usb_device_id *id;
|
|
struct usb_serial_device_type *t;
|
|
|
|
/* List trough know devices and see if the usb id matches */
|
|
list_for_each(p, &usb_serial_driver_list) {
|
|
t = list_entry(p, struct usb_serial_device_type, driver_list);
|
|
id = usb_match_id(iface, t->id_table);
|
|
if (id != NULL) {
|
|
dbg("descriptor matches");
|
|
return t;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int usb_serial_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *dev = interface_to_usbdev (interface);
|
|
struct usb_serial *serial = NULL;
|
|
struct usb_serial_port *port;
|
|
struct usb_host_interface *iface_desc;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
|
|
struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS];
|
|
struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
|
|
struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
|
|
struct usb_serial_device_type *type = NULL;
|
|
int retval;
|
|
int minor;
|
|
int buffer_size;
|
|
int i;
|
|
int num_interrupt_in = 0;
|
|
int num_interrupt_out = 0;
|
|
int num_bulk_in = 0;
|
|
int num_bulk_out = 0;
|
|
int num_ports = 0;
|
|
int max_endpoints;
|
|
|
|
type = search_serial_device(interface);
|
|
if (!type) {
|
|
dbg("none matched");
|
|
return -ENODEV;
|
|
}
|
|
|
|
serial = create_serial (dev, interface, type);
|
|
if (!serial) {
|
|
dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* if this device type has a probe function, call it */
|
|
if (type->probe) {
|
|
const struct usb_device_id *id;
|
|
|
|
if (!try_module_get(type->owner)) {
|
|
dev_err(&interface->dev, "module get failed, exiting\n");
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
|
|
id = usb_match_id(interface, type->id_table);
|
|
retval = type->probe(serial, id);
|
|
module_put(type->owner);
|
|
|
|
if (retval) {
|
|
dbg ("sub driver rejected device");
|
|
kfree (serial);
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
/* descriptor matches, let's find the endpoints needed */
|
|
/* check out the endpoints */
|
|
iface_desc = interface->cur_altsetting;
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
|
|
if ((endpoint->bEndpointAddress & 0x80) &&
|
|
((endpoint->bmAttributes & 3) == 0x02)) {
|
|
/* we found a bulk in endpoint */
|
|
dbg("found bulk in on endpoint %d", i);
|
|
bulk_in_endpoint[num_bulk_in] = endpoint;
|
|
++num_bulk_in;
|
|
}
|
|
|
|
if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
|
|
((endpoint->bmAttributes & 3) == 0x02)) {
|
|
/* we found a bulk out endpoint */
|
|
dbg("found bulk out on endpoint %d", i);
|
|
bulk_out_endpoint[num_bulk_out] = endpoint;
|
|
++num_bulk_out;
|
|
}
|
|
|
|
if ((endpoint->bEndpointAddress & 0x80) &&
|
|
((endpoint->bmAttributes & 3) == 0x03)) {
|
|
/* we found a interrupt in endpoint */
|
|
dbg("found interrupt in on endpoint %d", i);
|
|
interrupt_in_endpoint[num_interrupt_in] = endpoint;
|
|
++num_interrupt_in;
|
|
}
|
|
|
|
if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
|
|
((endpoint->bmAttributes & 3) == 0x03)) {
|
|
/* we found an interrupt out endpoint */
|
|
dbg("found interrupt out on endpoint %d", i);
|
|
interrupt_out_endpoint[num_interrupt_out] = endpoint;
|
|
++num_interrupt_out;
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE)
|
|
/* BEGIN HORRIBLE HACK FOR PL2303 */
|
|
/* this is needed due to the looney way its endpoints are set up */
|
|
if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) &&
|
|
(le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) ||
|
|
((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) &&
|
|
(le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID))) {
|
|
if (interface != dev->actconfig->interface[0]) {
|
|
/* check out the endpoints of the other interface*/
|
|
iface_desc = dev->actconfig->interface[0]->cur_altsetting;
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
if ((endpoint->bEndpointAddress & 0x80) &&
|
|
((endpoint->bmAttributes & 3) == 0x03)) {
|
|
/* we found a interrupt in endpoint */
|
|
dbg("found interrupt in for Prolific device on separate interface");
|
|
interrupt_in_endpoint[num_interrupt_in] = endpoint;
|
|
++num_interrupt_in;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now make sure the PL-2303 is configured correctly.
|
|
* If not, give up now and hope this hack will work
|
|
* properly during a later invocation of usb_serial_probe
|
|
*/
|
|
if (num_bulk_in == 0 || num_bulk_out == 0) {
|
|
dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n");
|
|
kfree (serial);
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
/* END HORRIBLE HACK FOR PL2303 */
|
|
#endif
|
|
|
|
/* found all that we need */
|
|
dev_info(&interface->dev, "%s converter detected\n", type->name);
|
|
|
|
#ifdef CONFIG_USB_SERIAL_GENERIC
|
|
if (type == &usb_serial_generic_device) {
|
|
num_ports = num_bulk_out;
|
|
if (num_ports == 0) {
|
|
dev_err(&interface->dev, "Generic device with no bulk out, not allowed.\n");
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
}
|
|
#endif
|
|
if (!num_ports) {
|
|
/* if this device type has a calc_num_ports function, call it */
|
|
if (type->calc_num_ports) {
|
|
if (!try_module_get(type->owner)) {
|
|
dev_err(&interface->dev, "module get failed, exiting\n");
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
num_ports = type->calc_num_ports (serial);
|
|
module_put(type->owner);
|
|
}
|
|
if (!num_ports)
|
|
num_ports = type->num_ports;
|
|
}
|
|
|
|
if (get_free_serial (serial, num_ports, &minor) == NULL) {
|
|
dev_err(&interface->dev, "No more free serial devices\n");
|
|
kfree (serial);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
serial->minor = minor;
|
|
serial->num_ports = num_ports;
|
|
serial->num_bulk_in = num_bulk_in;
|
|
serial->num_bulk_out = num_bulk_out;
|
|
serial->num_interrupt_in = num_interrupt_in;
|
|
serial->num_interrupt_out = num_interrupt_out;
|
|
|
|
/* create our ports, we need as many as the max endpoints */
|
|
/* we don't use num_ports here cauz some devices have more endpoint pairs than ports */
|
|
max_endpoints = max(num_bulk_in, num_bulk_out);
|
|
max_endpoints = max(max_endpoints, num_interrupt_in);
|
|
max_endpoints = max(max_endpoints, num_interrupt_out);
|
|
max_endpoints = max(max_endpoints, (int)serial->num_ports);
|
|
serial->num_port_pointers = max_endpoints;
|
|
dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints);
|
|
for (i = 0; i < max_endpoints; ++i) {
|
|
port = kmalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
|
|
if (!port)
|
|
goto probe_error;
|
|
memset(port, 0x00, sizeof(struct usb_serial_port));
|
|
port->number = i + serial->minor;
|
|
port->serial = serial;
|
|
INIT_WORK(&port->work, usb_serial_port_softint, port);
|
|
serial->port[i] = port;
|
|
}
|
|
|
|
/* set up the endpoint information */
|
|
for (i = 0; i < num_bulk_in; ++i) {
|
|
endpoint = bulk_in_endpoint[i];
|
|
port = serial->port[i];
|
|
port->read_urb = usb_alloc_urb (0, GFP_KERNEL);
|
|
if (!port->read_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->bulk_in_size = buffer_size;
|
|
port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
|
|
port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->bulk_in_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate bulk_in_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_bulk_urb (port->read_urb, dev,
|
|
usb_rcvbulkpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->bulk_in_buffer, buffer_size,
|
|
serial->type->read_bulk_callback,
|
|
port);
|
|
}
|
|
|
|
for (i = 0; i < num_bulk_out; ++i) {
|
|
endpoint = bulk_out_endpoint[i];
|
|
port = serial->port[i];
|
|
port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port->write_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->bulk_out_size = buffer_size;
|
|
port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
|
|
port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->bulk_out_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate bulk_out_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_bulk_urb (port->write_urb, dev,
|
|
usb_sndbulkpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->bulk_out_buffer, buffer_size,
|
|
serial->type->write_bulk_callback,
|
|
port);
|
|
}
|
|
|
|
if (serial->type->read_int_callback) {
|
|
for (i = 0; i < num_interrupt_in; ++i) {
|
|
endpoint = interrupt_in_endpoint[i];
|
|
port = serial->port[i];
|
|
port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port->interrupt_in_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->interrupt_in_endpointAddress = endpoint->bEndpointAddress;
|
|
port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->interrupt_in_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate interrupt_in_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_int_urb (port->interrupt_in_urb, dev,
|
|
usb_rcvintpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->interrupt_in_buffer, buffer_size,
|
|
serial->type->read_int_callback, port,
|
|
endpoint->bInterval);
|
|
}
|
|
} else if (num_interrupt_in) {
|
|
dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined");
|
|
}
|
|
|
|
if (serial->type->write_int_callback) {
|
|
for (i = 0; i < num_interrupt_out; ++i) {
|
|
endpoint = interrupt_out_endpoint[i];
|
|
port = serial->port[i];
|
|
port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port->interrupt_out_urb) {
|
|
dev_err(&interface->dev, "No free urbs available\n");
|
|
goto probe_error;
|
|
}
|
|
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
|
|
port->interrupt_out_size = buffer_size;
|
|
port->interrupt_out_endpointAddress = endpoint->bEndpointAddress;
|
|
port->interrupt_out_buffer = kmalloc (buffer_size, GFP_KERNEL);
|
|
if (!port->interrupt_out_buffer) {
|
|
dev_err(&interface->dev, "Couldn't allocate interrupt_out_buffer\n");
|
|
goto probe_error;
|
|
}
|
|
usb_fill_int_urb (port->interrupt_out_urb, dev,
|
|
usb_sndintpipe (dev,
|
|
endpoint->bEndpointAddress),
|
|
port->interrupt_out_buffer, buffer_size,
|
|
serial->type->write_int_callback, port,
|
|
endpoint->bInterval);
|
|
}
|
|
} else if (num_interrupt_out) {
|
|
dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined");
|
|
}
|
|
|
|
/* if this device type has an attach function, call it */
|
|
if (type->attach) {
|
|
if (!try_module_get(type->owner)) {
|
|
dev_err(&interface->dev, "module get failed, exiting\n");
|
|
goto probe_error;
|
|
}
|
|
retval = type->attach (serial);
|
|
module_put(type->owner);
|
|
if (retval < 0)
|
|
goto probe_error;
|
|
if (retval > 0) {
|
|
/* quietly accept this device, but don't bind to a serial port
|
|
* as it's about to disappear */
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
/* register all of the individual ports with the driver core */
|
|
for (i = 0; i < num_ports; ++i) {
|
|
port = serial->port[i];
|
|
port->dev.parent = &interface->dev;
|
|
port->dev.driver = NULL;
|
|
port->dev.bus = &usb_serial_bus_type;
|
|
port->dev.release = &port_release;
|
|
|
|
snprintf (&port->dev.bus_id[0], sizeof(port->dev.bus_id), "ttyUSB%d", port->number);
|
|
dbg ("%s - registering %s", __FUNCTION__, port->dev.bus_id);
|
|
device_register (&port->dev);
|
|
}
|
|
|
|
usb_serial_console_init (debug, minor);
|
|
|
|
exit:
|
|
/* success */
|
|
usb_set_intfdata (interface, serial);
|
|
return 0;
|
|
|
|
probe_error:
|
|
for (i = 0; i < num_bulk_in; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->read_urb)
|
|
usb_free_urb (port->read_urb);
|
|
kfree(port->bulk_in_buffer);
|
|
}
|
|
for (i = 0; i < num_bulk_out; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->write_urb)
|
|
usb_free_urb (port->write_urb);
|
|
kfree(port->bulk_out_buffer);
|
|
}
|
|
for (i = 0; i < num_interrupt_in; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->interrupt_in_urb)
|
|
usb_free_urb (port->interrupt_in_urb);
|
|
kfree(port->interrupt_in_buffer);
|
|
}
|
|
for (i = 0; i < num_interrupt_out; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
if (port->interrupt_out_urb)
|
|
usb_free_urb (port->interrupt_out_urb);
|
|
kfree(port->interrupt_out_buffer);
|
|
}
|
|
|
|
/* return the minor range that this device had */
|
|
return_serial (serial);
|
|
|
|
/* free up any memory that we allocated */
|
|
for (i = 0; i < serial->num_port_pointers; ++i)
|
|
kfree(serial->port[i]);
|
|
kfree (serial);
|
|
return -EIO;
|
|
}
|
|
|
|
void usb_serial_disconnect(struct usb_interface *interface)
|
|
{
|
|
int i;
|
|
struct usb_serial *serial = usb_get_intfdata (interface);
|
|
struct device *dev = &interface->dev;
|
|
struct usb_serial_port *port;
|
|
|
|
dbg ("%s", __FUNCTION__);
|
|
|
|
usb_set_intfdata (interface, NULL);
|
|
if (serial) {
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
port = serial->port[i];
|
|
if (port && port->tty)
|
|
tty_hangup(port->tty);
|
|
}
|
|
/* let the last holder of this object
|
|
* cause it to be cleaned up */
|
|
kref_put(&serial->kref, destroy_serial);
|
|
}
|
|
dev_info(dev, "device disconnected\n");
|
|
}
|
|
|
|
static struct tty_operations serial_ops = {
|
|
.open = serial_open,
|
|
.close = serial_close,
|
|
.write = serial_write,
|
|
.write_room = serial_write_room,
|
|
.ioctl = serial_ioctl,
|
|
.set_termios = serial_set_termios,
|
|
.throttle = serial_throttle,
|
|
.unthrottle = serial_unthrottle,
|
|
.break_ctl = serial_break,
|
|
.chars_in_buffer = serial_chars_in_buffer,
|
|
.read_proc = serial_read_proc,
|
|
.tiocmget = serial_tiocmget,
|
|
.tiocmset = serial_tiocmset,
|
|
};
|
|
|
|
struct tty_driver *usb_serial_tty_driver;
|
|
|
|
static int __init usb_serial_init(void)
|
|
{
|
|
int i;
|
|
int result;
|
|
|
|
usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS);
|
|
if (!usb_serial_tty_driver)
|
|
return -ENOMEM;
|
|
|
|
/* Initialize our global data */
|
|
for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
|
|
serial_table[i] = NULL;
|
|
}
|
|
|
|
result = bus_register(&usb_serial_bus_type);
|
|
if (result) {
|
|
err("%s - registering bus driver failed", __FUNCTION__);
|
|
goto exit_bus;
|
|
}
|
|
|
|
/* register the generic driver, if we should */
|
|
result = usb_serial_generic_register(debug);
|
|
if (result < 0) {
|
|
err("%s - registering generic driver failed", __FUNCTION__);
|
|
goto exit_generic;
|
|
}
|
|
|
|
usb_serial_tty_driver->owner = THIS_MODULE;
|
|
usb_serial_tty_driver->driver_name = "usbserial";
|
|
usb_serial_tty_driver->devfs_name = "usb/tts/";
|
|
usb_serial_tty_driver->name = "ttyUSB";
|
|
usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
|
|
usb_serial_tty_driver->minor_start = 0;
|
|
usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
|
|
usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
|
|
usb_serial_tty_driver->init_termios = tty_std_termios;
|
|
usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
|
tty_set_operations(usb_serial_tty_driver, &serial_ops);
|
|
result = tty_register_driver(usb_serial_tty_driver);
|
|
if (result) {
|
|
err("%s - tty_register_driver failed", __FUNCTION__);
|
|
goto exit_reg_driver;
|
|
}
|
|
|
|
/* register the USB driver */
|
|
result = usb_register(&usb_serial_driver);
|
|
if (result < 0) {
|
|
err("%s - usb_register failed", __FUNCTION__);
|
|
goto exit_tty;
|
|
}
|
|
|
|
info(DRIVER_DESC " " DRIVER_VERSION);
|
|
|
|
return result;
|
|
|
|
exit_tty:
|
|
tty_unregister_driver(usb_serial_tty_driver);
|
|
|
|
exit_reg_driver:
|
|
usb_serial_generic_deregister();
|
|
|
|
exit_generic:
|
|
bus_unregister(&usb_serial_bus_type);
|
|
|
|
exit_bus:
|
|
err ("%s - returning with error %d", __FUNCTION__, result);
|
|
put_tty_driver(usb_serial_tty_driver);
|
|
return result;
|
|
}
|
|
|
|
|
|
static void __exit usb_serial_exit(void)
|
|
{
|
|
usb_serial_console_exit();
|
|
|
|
usb_serial_generic_deregister();
|
|
|
|
usb_deregister(&usb_serial_driver);
|
|
tty_unregister_driver(usb_serial_tty_driver);
|
|
put_tty_driver(usb_serial_tty_driver);
|
|
bus_unregister(&usb_serial_bus_type);
|
|
}
|
|
|
|
|
|
module_init(usb_serial_init);
|
|
module_exit(usb_serial_exit);
|
|
|
|
#define set_to_generic_if_null(type, function) \
|
|
do { \
|
|
if (!type->function) { \
|
|
type->function = usb_serial_generic_##function; \
|
|
dbg("Had to override the " #function \
|
|
" usb serial operation with the generic one.");\
|
|
} \
|
|
} while (0)
|
|
|
|
static void fixup_generic(struct usb_serial_device_type *device)
|
|
{
|
|
set_to_generic_if_null(device, open);
|
|
set_to_generic_if_null(device, write);
|
|
set_to_generic_if_null(device, close);
|
|
set_to_generic_if_null(device, write_room);
|
|
set_to_generic_if_null(device, chars_in_buffer);
|
|
set_to_generic_if_null(device, read_bulk_callback);
|
|
set_to_generic_if_null(device, write_bulk_callback);
|
|
set_to_generic_if_null(device, shutdown);
|
|
}
|
|
|
|
int usb_serial_register(struct usb_serial_device_type *new_device)
|
|
{
|
|
int retval;
|
|
|
|
fixup_generic(new_device);
|
|
|
|
/* Add this device to our list of devices */
|
|
list_add(&new_device->driver_list, &usb_serial_driver_list);
|
|
|
|
retval = usb_serial_bus_register(new_device);
|
|
if (retval) {
|
|
err("problem %d when registering driver %s", retval, new_device->name);
|
|
list_del(&new_device->driver_list);
|
|
}
|
|
else
|
|
info("USB Serial support registered for %s", new_device->name);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
void usb_serial_deregister(struct usb_serial_device_type *device)
|
|
{
|
|
info("USB Serial deregistering driver %s", device->name);
|
|
list_del(&device->driver_list);
|
|
usb_serial_bus_deregister(device);
|
|
}
|
|
|
|
|
|
|
|
/* If the usb-serial core is built into the core, the usb-serial drivers
|
|
need these symbols to load properly as modules. */
|
|
EXPORT_SYMBOL_GPL(usb_serial_register);
|
|
EXPORT_SYMBOL_GPL(usb_serial_deregister);
|
|
EXPORT_SYMBOL_GPL(usb_serial_probe);
|
|
EXPORT_SYMBOL_GPL(usb_serial_disconnect);
|
|
EXPORT_SYMBOL_GPL(usb_serial_port_softint);
|
|
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR( DRIVER_AUTHOR );
|
|
MODULE_DESCRIPTION( DRIVER_DESC );
|
|
MODULE_VERSION( DRIVER_VERSION );
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|