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/*
* USB FTDI SIO driver
*
* Copyright (C) 1999 - 2001
* Greg Kroah-Hartman (greg@kroah.com)
* Bill Ryder (bryder@sgi.com)
* Copyright (C) 2002
* Kuba Ober (kuba@mareimbrium.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* See Documentation/usb/usb-serial.txt for more information on using this driver
*
* See http://ftdi-usb-sio.sourceforge.net for upto date testing info
* and extra documentation
*
* (21/Jul/2004) Ian Abbott
* Incorporated Steven Turner's code to add support for the FT2232C chip.
* The prelimilary port to the 2.6 kernel was by Rus V. Brushkoff. I have
* fixed a couple of things.
*
* (27/May/2004) Ian Abbott
* Improved throttling code, mostly stolen from the WhiteHEAT driver.
*
* (26/Mar/2004) Jan Capek
* Added PID's for ICD-U20/ICD-U40 - incircuit PIC debuggers from CCS Inc.
*
* (09/Feb/2004) Ian Abbott
* Changed full name of USB-UIRT device to avoid "/" character.
* Added FTDI's alternate PID (0x6006) for FT232/245 devices.
* Added PID for "ELV USB Module UO100" from Stefan Frings.
*
* (21/Oct/2003) Ian Abbott
* Renamed some VID/PID macros for Matrix Orbital and Perle Systems
* devices. Removed Matrix Orbital and Perle Systems devices from the
* 8U232AM device table, but left them in the FT232BM table, as they are
* known to use only FT232BM.
*
* (17/Oct/2003) Scott Allen
* Added vid/pid for Perle Systems UltraPort USB serial converters
*
* (21/Sep/2003) Ian Abbott
* Added VID/PID for Omnidirectional Control Technology US101 USB to
* RS-232 adapter (also rebadged as Dick Smith Electronics XH6381).
* VID/PID supplied by Donald Gordon.
*
* (19/Aug/2003) Ian Abbott
* Freed urb's transfer buffer in write bulk callback.
* Omitted some paranoid checks in write bulk callback that don't matter.
* Scheduled work in write bulk callback regardless of port's open count.
*
* (05/Aug/2003) Ian Abbott
* Added VID/PID for ID TECH IDT1221U USB to RS-232 adapter.
* VID/PID provided by Steve Briggs.
*
* (23/Jul/2003) Ian Abbott
* Added PIDs for CrystalFontz 547, 633, 631, 635, 640 and 640 from
* Wayne Wylupski.
*
* (10/Jul/2003) David Glance
* Added PID for DSS-20 SyncStation cradle for Sony-Ericsson P800.
*
* (27/Jun/2003) Ian Abbott
* Reworked the urb handling logic. We have no more pool, but dynamically
* allocate the urb and the transfer buffer on the fly. In testing this
* does not incure any measurable overhead. This also relies on the fact
* that we have proper reference counting logic for urbs. I nicked this
* from Greg KH's Visor driver.
*
* (23/Jun/2003) Ian Abbott
* Reduced flip buffer pushes and corrected a data length test in
* ftdi_read_bulk_callback.
* Defererence pointers after any paranoid checks, not before.
*
* (21/Jun/2003) Erik Nygren
* Added support for Home Electronics Tira-1 IR transceiver using FT232BM chip.
* See <http://www.home-electro.com/tira1.htm>. Only operates properly
* at 100000 and RTS-CTS, so set custom divisor mode on startup.
* Also force the Tira-1 and USB-UIRT to only use their custom baud rates.
*
* (18/Jun/2003) Ian Abbott
* Added Device ID of the USB relais from Rudolf Gugler (backported from
* Philipp Gühring's patch for 2.5.x kernel).
* Moved read transfer buffer reallocation into startup function.
* Free existing write urb and transfer buffer in startup function.
* Only use urbs in write urb pool that were successfully allocated.
* Moved some constant macros out of functions.
* Minor whitespace and comment changes.
*
* (12/Jun/2003) David Norwood
* Added support for USB-UIRT IR transceiver using 8U232AM chip.
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* See <http://home.earthlink.net/~jrhees/USBUIRT/index.htm>. Only
* operates properly at 312500, so set custom divisor mode on startup.
*
* (12/Jun/2003) Ian Abbott
* Added Sealevel SeaLINK+ 210x, 220x, 240x, 280x vid/pids from Tuan Hoang
* - I've eliminated some that don't seem to exist!
* Added Home Electronics Tira-1 IR transceiver pid from Chris Horn
* Some whitespace/coding-style cleanups
*
* (11/Jun/2003) Ian Abbott
* Fixed unsafe spinlock usage in ftdi_write
*
* (24/Feb/2003) Richard Shooter
* Increase read buffer size to improve read speeds at higher baud rates
* (specifically tested with up to 1Mb/sec at 1.5M baud)
*
* (23/Feb/2003) John Wilkins
* Added Xon/xoff flow control (activating support in the ftdi device)
* Added vid/pid for Videonetworks/Homechoice (UK ISP)
*
* (23/Feb/2003) Bill Ryder
* Added matrix orb device vid/pids from Wayne Wylupski
*
* (19/Feb/2003) Ian Abbott
* For TIOCSSERIAL, set alt_speed to 0 when ASYNC_SPD_MASK value has
* changed to something other than ASYNC_SPD_HI, ASYNC_SPD_VHI,
* ASYNC_SPD_SHI or ASYNC_SPD_WARP. Also, unless ASYNC_SPD_CUST is in
* force, don't bother changing baud rate when custom_divisor has changed.
*
* (18/Feb/2003) Ian Abbott
* Fixed TIOCMGET handling to include state of DTR and RTS, the state
* of which are now saved by set_dtr() and set_rts().
* Fixed improper storage class for buf in set_dtr() and set_rts().
* Added FT232BM chip type and support for its extra baud rates (compared
* to FT8U232AM).
* Took account of special case divisor values for highest baud rates of
* FT8U232AM and FT232BM.
* For TIOCSSERIAL, forced alt_speed to 0 when ASYNC_SPD_CUST kludge used,
* as previous alt_speed setting is now stale.
* Moved startup code common between the startup routines for the
* different chip types into a common subroutine.
*
* (17/Feb/2003) Bill Ryder
* Added write urb buffer pool on a per device basis
* Added more checking for open file on callbacks (fixed OOPS)
* Added CrystalFontz 632 and 634 PIDs
* (thanx to CrystalFontz for the sample devices - they flushed out
* some driver bugs)
* Minor debugging message changes
* Added throttle, unthrottle and chars_in_buffer functions
* Fixed FTDI_SIO (the original device) bug
* Fixed some shutdown handling
*
*
*
*
* (07/Jun/2002) Kuba Ober
* Changed FTDI_SIO_BASE_BAUD_TO_DIVISOR macro into ftdi_baud_to_divisor
* function. It was getting too complex.
* Fix the divisor calculation logic which was setting divisor of 0.125
* instead of 0.5 for fractional parts of divisor equal to 5/8, 6/8, 7/8.
* Also make it bump up the divisor to next integer in case of 7/8 - it's
* a better approximation.
*
* (25/Jul/2002) Bill Ryder inserted Dmitri's TIOCMIWAIT patch
* Not tested by me but it doesn't break anything I use.
*
* (04/Jan/2002) Kuba Ober
* Implemented 38400 baudrate kludge, where it can be substituted with other
* values. That's the only way to set custom baudrates.
* Implemented TIOCSSERIAL, TIOCGSERIAL ioctl's so that setserial is happy.
* FIXME: both baudrate things should eventually go to usbserial.c as other
* devices may need that functionality too. Actually, it can probably be
* merged in serial.c somehow - too many drivers repeat this code over
* and over.
* Fixed baudrate forgetfulness - open() used to reset baudrate to 9600 every time.
* Divisors for baudrates are calculated by a macro.
* Small code cleanups. Ugly whitespace changes for Plato's sake only ;-].
*
* (04/Nov/2001) Bill Ryder
* Fixed bug in read_bulk_callback where incorrect urb buffer was used.
* Cleaned up write offset calculation
* Added write_room since default values can be incorrect for sio
* Changed write_bulk_callback to use same queue_task as other drivers
* (the previous version caused panics)
* Removed port iteration code since the device only has one I/O port and it
* was wrong anyway.
*
* (31/May/2001) gkh
* Switched from using spinlock to a semaphore, which fixes lots of problems.
*
* (23/May/2001) Bill Ryder
* Added runtime debug patch (thanx Tyson D Sawyer).
* Cleaned up comments for 8U232
* Added parity, framing and overrun error handling
* Added receive break handling.
*
* (04/08/2001) gb
* Identify version on module load.
*
* (18/March/2001) Bill Ryder
* (Not released)
* Added send break handling. (requires kernel patch too)
* Fixed 8U232AM hardware RTS/CTS etc status reporting.
* Added flipbuf fix copied from generic device
*
* (12/3/2000) Bill Ryder
* Added support for 8U232AM device.
* Moved PID and VIDs into header file only.
* Turned on low-latency for the tty (device will do high baudrates)
* Added shutdown routine to close files when device removed.
* More debug and error message cleanups.
*
* (11/13/2000) Bill Ryder
* Added spinlock protected open code and close code.
* Multiple opens work (sort of - see webpage mentioned above).
* Cleaned up comments. Removed multiple PID/VID definitions.
* Factorised cts/dtr code
* Made use of __FUNCTION__ in dbg's
*
* (11/01/2000) Adam J. Richter
* usb_device_id table support
*
* (10/05/2000) gkh
* Fixed bug with urb->dev not being set properly, now that the usb
* core needs it.
*
* (09/11/2000) gkh
* Removed DEBUG #ifdefs with call to usb_serial_debug_data
*
* (07/19/2000) gkh
* Added module_init and module_exit functions to handle the fact that this
* driver is a loadable module now.
*
* (04/04/2000) Bill Ryder
* Fixed bugs in TCGET/TCSET ioctls (by removing them - they are
* handled elsewhere in the tty io driver chain).
*
* (03/30/2000) Bill Ryder
* Implemented lots of ioctls
* Fixed a race condition in write
* Changed some dbg's to errs
*
* (03/26/2000) gkh
* Split driver up into device specific pieces.
*
*/
/* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */
/* Thanx to FTDI for so kindly providing details of the protocol required */
/* to talk to the device */
/* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
#include <linux/serial.h>
#include <linux/usb/serial.h>
#include "ftdi_sio.h"
/*
* Version Information
*/
#define DRIVER_VERSION "v1.4.3"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
#define DRIVER_DESC "USB FTDI Serial Converters Driver"
static int debug;
static __u16 vendor = FTDI_VID;
static __u16 product;
/* struct ftdi_sio_quirk is used by devices requiring special attention. */
struct ftdi_sio_quirk {
void (*setup)(struct usb_serial *); /* Special settings during startup. */
};
static void ftdi_USB_UIRT_setup (struct usb_serial *serial);
static void ftdi_HE_TIRA1_setup (struct usb_serial *serial);
static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
.setup = ftdi_USB_UIRT_setup,
};
static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
.setup = ftdi_HE_TIRA1_setup,
};
/*
* The 8U232AM has the same API as the sio except for:
* - it can support MUCH higher baudrates; up to:
* o 921600 for RS232 and 2000000 for RS422/485 at 48MHz
* o 230400 at 12MHz
* so .. 8U232AM's baudrate setting codes are different
* - it has a two byte status code.
* - it returns characters every 16ms (the FTDI does it every 40ms)
*
* the bcdDevice value is used to differentiate FT232BM and FT245BM from
* the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID
* combinations in both tables.
* FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices,
* but I don't know if those ever went into mass production. [Ian Abbott]
*/
static struct usb_device_id id_table_combined [] = {
{ USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) },
Razvan Gavril
committed
{ USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
{ USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
{ USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
{ USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
{ USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
{ USB_DEVICE(OCT_VID, OCT_US101_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
.driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
{ USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
.driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
{ USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
/*
* These will probably use user-space drivers. Uncomment them if
* you need them or use the user-specified vendor/product module
* parameters (see ftdi_sio.h for the numbers). Make a fuss if
* you think the driver should recognize any of them by default.
*/
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) }, */
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, */
{ USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
{ USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
{ USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
{ USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
{ USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
{ USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
{ USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
{ USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
{ USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
{ USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
{ USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
{ USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
{ USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
{ USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
{ USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_0_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
{ USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
{ USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
{ USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
{ USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
{ USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
{ USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
{ USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
{ USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
{ }, /* Optional parameter entry */
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, id_table_combined);
static struct usb_driver ftdi_driver = {
.name = "ftdi_sio",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table_combined,
.no_dynamic_id = 1,
static const char *ftdi_chip_name[] = {
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[SIO] = "SIO", /* the serial part of FT8U100AX */
[FT8U232AM] = "FT8U232AM",
[FT232BM] = "FT232BM",
[FT2232C] = "FT2232C",
};
/* Constants for read urb and write urb */
#define BUFSZ 512
#define PKTSZ 64
/* rx_flags */
#define THROTTLED 0x01
#define ACTUALLY_THROTTLED 0x02
struct ftdi_private {
ftdi_chip_type_t chip_type;
/* type of the device, either SIO or FT8U232AM */
int baud_base; /* baud base clock for divisor setting */
int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */
__u16 last_set_data_urb_value ;
/* the last data state set - needed for doing a break */
int write_offset; /* This is the offset in the usb data block to write the serial data -
* it is different between devices
*/
int flags; /* some ASYNC_xxxx flags are supported */
unsigned long last_dtr_rts; /* saved modem control outputs */
wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
char prev_status, diff_status; /* Used for TIOCMIWAIT */
__u8 rx_flags; /* receive state flags (throttling) */
spinlock_t rx_lock; /* spinlock for receive state */
struct work_struct rx_work;
int rx_processed;
__u16 interface; /* FT2232C port interface (0 for FT232/245) */
int force_baud; /* if non-zero, force the baud rate to this value */
int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
spinlock_t tx_lock; /* spinlock for transmit state */
unsigned long tx_bytes;
unsigned long tx_outstanding_bytes;
unsigned long tx_outstanding_urbs;
};
/* Used for TIOCMIWAIT */
#define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
#define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
/* End TIOCMIWAIT */
#define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \
ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP )
/* function prototypes for a FTDI serial converter */
static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
static int ftdi_sio_attach (struct usb_serial *serial);
static void ftdi_shutdown (struct usb_serial *serial);
static int ftdi_open (struct usb_serial_port *port, struct file *filp);
static void ftdi_close (struct usb_serial_port *port, struct file *filp);
static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
static int ftdi_write_room (struct usb_serial_port *port);
static int ftdi_chars_in_buffer (struct usb_serial_port *port);
static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
static void ftdi_process_read (void *param);
static void ftdi_set_termios (struct usb_serial_port *port, struct termios * old);
static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
static void ftdi_throttle (struct usb_serial_port *port);
static void ftdi_unthrottle (struct usb_serial_port *port);
static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
static unsigned short int ftdi_232am_baud_to_divisor (int baud);
static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
static __u32 ftdi_232bm_baud_to_divisor (int baud);
static struct usb_serial_driver ftdi_sio_device = {
.driver = {
.owner = THIS_MODULE,
.name = "ftdi_sio",
},
.description = "FTDI USB Serial Device",
.id_table = id_table_combined,
.num_interrupt_in = 0,
.num_bulk_in = 1,
.num_bulk_out = 1,
.num_ports = 1,
.probe = ftdi_sio_probe,
.open = ftdi_open,
.close = ftdi_close,
.throttle = ftdi_throttle,
.unthrottle = ftdi_unthrottle,
.write = ftdi_write,
.write_room = ftdi_write_room,
.chars_in_buffer = ftdi_chars_in_buffer,
.read_bulk_callback = ftdi_read_bulk_callback,
.write_bulk_callback = ftdi_write_bulk_callback,
.tiocmget = ftdi_tiocmget,
.tiocmset = ftdi_tiocmset,
.ioctl = ftdi_ioctl,
.set_termios = ftdi_set_termios,
.break_ctl = ftdi_break_ctl,
.attach = ftdi_sio_attach,
.shutdown = ftdi_shutdown,
};
#define WDR_TIMEOUT 5000 /* default urb timeout */
#define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
/* High and low are for DTR, RTS etc etc */
#define HIGH 1
#define LOW 0
/* number of outstanding urbs to prevent userspace DoS from happening */
#define URB_UPPER_LIMIT 42
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/*
* ***************************************************************************
* Utlity functions
* ***************************************************************************
*/
static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
{
unsigned short int divisor;
int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
divisor = divisor3 >> 3;
divisor3 &= 0x7;
if (divisor3 == 1) divisor |= 0xc000; else // 0.125
if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
if (divisor3 != 0) divisor |= 0x8000; // 0.25
if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
return divisor;
}
static unsigned short int ftdi_232am_baud_to_divisor(int baud)
{
return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
}
static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
{
static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
__u32 divisor;
int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
divisor = divisor3 >> 3;
divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
/* Deal with special cases for highest baud rates. */
if (divisor == 1) divisor = 0; else // 1.0
if (divisor == 0x4001) divisor = 1; // 1.5
return divisor;
}
static __u32 ftdi_232bm_baud_to_divisor(int baud)
{
return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
}
#define set_mctrl(port, set) update_mctrl((port), (set), 0)
#define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
char *buf;
unsigned urb_value;
if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
return 0; /* no change */
}
clear &= ~set; /* 'set' takes precedence over 'clear' */
urb_value = 0;
if (clear & TIOCM_DTR)
urb_value |= FTDI_SIO_SET_DTR_LOW;
if (clear & TIOCM_RTS)
urb_value |= FTDI_SIO_SET_RTS_LOW;
if (set & TIOCM_DTR)
urb_value |= FTDI_SIO_SET_DTR_HIGH;
if (set & TIOCM_RTS)
urb_value |= FTDI_SIO_SET_RTS_HIGH;
rv = usb_control_msg(port->serial->dev,
usb_sndctrlpipe(port->serial->dev, 0),
FTDI_SIO_SET_MODEM_CTRL_REQUEST,
FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
urb_value, priv->interface,
if (rv < 0) {
err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
__FUNCTION__,
(set & TIOCM_DTR) ? "HIGH" :
(clear & TIOCM_DTR) ? "LOW" : "unchanged",
(set & TIOCM_RTS) ? "HIGH" :
(clear & TIOCM_RTS) ? "LOW" : "unchanged");
} else {
dbg("%s - DTR %s, RTS %s", __FUNCTION__,
(set & TIOCM_DTR) ? "HIGH" :
(clear & TIOCM_DTR) ? "LOW" : "unchanged",
(set & TIOCM_RTS) ? "HIGH" :
(clear & TIOCM_RTS) ? "LOW" : "unchanged");
priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
}
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return rv;
}
static __u32 get_ftdi_divisor(struct usb_serial_port * port);
static int change_speed(struct usb_serial_port *port)
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
char *buf;
__u16 urb_value;
__u16 urb_index;
__u32 urb_index_value;
int rv;
buf = kmalloc(1, GFP_NOIO);
if (!buf)
return -ENOMEM;
urb_index_value = get_ftdi_divisor(port);
urb_value = (__u16)urb_index_value;
urb_index = (__u16)(urb_index_value >> 16);
if (priv->interface) { /* FT2232C */
urb_index = (__u16)((urb_index << 8) | priv->interface);
}
rv = usb_control_msg(port->serial->dev,
usb_sndctrlpipe(port->serial->dev, 0),
FTDI_SIO_SET_BAUDRATE_REQUEST,
FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
urb_value, urb_index,
buf, 0, WDR_SHORT_TIMEOUT);
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kfree(buf);
return rv;
}
static __u32 get_ftdi_divisor(struct usb_serial_port * port)
{ /* get_ftdi_divisor */
struct ftdi_private *priv = usb_get_serial_port_data(port);
__u32 div_value = 0;
int div_okay = 1;
int baud;
/*
* The logic involved in setting the baudrate can be cleanly split in 3 steps.
* Obtaining the actual baud rate is a little tricky since unix traditionally
* somehow ignored the possibility to set non-standard baud rates.
* 1. Standard baud rates are set in tty->termios->c_cflag
* 2. If these are not enough, you can set any speed using alt_speed as follows:
* - set tty->termios->c_cflag speed to B38400
* - set your real speed in tty->alt_speed; it gets ignored when
* alt_speed==0, (or)
* - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
* flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
* sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
* ** Steps 1, 2 are done courtesy of tty_get_baud_rate
* 3. You can also set baud rate by setting custom divisor as follows
* - set tty->termios->c_cflag speed to B38400
* - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
* o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
* o custom_divisor set to baud_base / your_new_baudrate
* ** Step 3 is done courtesy of code borrowed from serial.c - I should really
* spend some time and separate+move this common code to serial.c, it is
* replicated in nearly every serial driver you see.
*/
/* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
baud = tty_get_baud_rate(port->tty);
dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud);
/* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
if (baud == 38400 &&
((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
(priv->custom_divisor)) {
baud = priv->baud_base / priv->custom_divisor;
dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud);
}
/* 3. Convert baudrate to device-specific divisor */
if (!baud) baud = 9600;
switch(priv->chip_type) {
case SIO: /* SIO chip */
switch(baud) {
case 300: div_value = ftdi_sio_b300; break;
case 600: div_value = ftdi_sio_b600; break;
case 1200: div_value = ftdi_sio_b1200; break;
case 2400: div_value = ftdi_sio_b2400; break;
case 4800: div_value = ftdi_sio_b4800; break;
case 9600: div_value = ftdi_sio_b9600; break;
case 19200: div_value = ftdi_sio_b19200; break;
case 38400: div_value = ftdi_sio_b38400; break;
case 57600: div_value = ftdi_sio_b57600; break;
case 115200: div_value = ftdi_sio_b115200; break;
} /* baud */
if (div_value == 0) {
dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
div_value = ftdi_sio_b9600;
div_okay = 0;
}
break;
case FT8U232AM: /* 8U232AM chip */
if (baud <= 3000000) {
div_value = ftdi_232am_baud_to_divisor(baud);
} else {
dbg("%s - Baud rate too high!", __FUNCTION__);
div_value = ftdi_232am_baud_to_divisor(9600);
div_okay = 0;
}
break;
case FT232BM: /* FT232BM chip */
case FT2232C: /* FT2232C chip */
if (baud <= 3000000) {
div_value = ftdi_232bm_baud_to_divisor(baud);
} else {
dbg("%s - Baud rate too high!", __FUNCTION__);
div_value = ftdi_232bm_baud_to_divisor(9600);
div_okay = 0;
}
break;
} /* priv->chip_type */
if (div_okay) {
dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
__FUNCTION__, baud, (unsigned long)div_value,
ftdi_chip_name[priv->chip_type]);
}
return(div_value);
}
static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct serial_struct tmp;
if (!retinfo)
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
tmp.flags = priv->flags;
tmp.baud_base = priv->baud_base;
tmp.custom_divisor = priv->custom_divisor;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
} /* get_serial_info */
static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
{ /* set_serial_info */
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct serial_struct new_serial;
struct ftdi_private old_priv;
if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
return -EFAULT;
old_priv = * priv;
/* Do error checking and permission checking */
if (!capable(CAP_SYS_ADMIN)) {
if (((new_serial.flags & ~ASYNC_USR_MASK) !=
(priv->flags & ~ASYNC_USR_MASK)))
return -EPERM;
priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
(new_serial.flags & ASYNC_USR_MASK));
priv->custom_divisor = new_serial.custom_divisor;
goto check_and_exit;
}
if ((new_serial.baud_base != priv->baud_base) &&
(new_serial.baud_base < 9600))
return -EINVAL;
/* Make the changes - these are privileged changes! */
priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
(new_serial.flags & ASYNC_FLAGS));
priv->custom_divisor = new_serial.custom_divisor;
port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
check_and_exit:
if ((old_priv.flags & ASYNC_SPD_MASK) !=
(priv->flags & ASYNC_SPD_MASK)) {
if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
port->tty->alt_speed = 57600;
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
port->tty->alt_speed = 115200;
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
port->tty->alt_speed = 230400;
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
port->tty->alt_speed = 460800;
else
port->tty->alt_speed = 0;
}
if (((old_priv.flags & ASYNC_SPD_MASK) !=
(priv->flags & ASYNC_SPD_MASK)) ||
(((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
(old_priv.custom_divisor != priv->custom_divisor))) {
change_speed(port);
}
return (0);
} /* set_serial_info */
/* Determine type of FTDI chip based on USB config and descriptor. */
static void ftdi_determine_type(struct usb_serial_port *port)
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct usb_serial *serial = port->serial;
struct usb_device *udev = serial->dev;
unsigned version;
unsigned interfaces;
/* Assume it is not the original SIO device for now. */
priv->baud_base = 48000000 / 2;
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priv->write_offset = 0;
version = le16_to_cpu(udev->descriptor.bcdDevice);
interfaces = udev->actconfig->desc.bNumInterfaces;
dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__,
version, interfaces);
if (interfaces > 1) {
int inter;
/* Multiple interfaces. Assume FT2232C. */
priv->chip_type = FT2232C;
/* Determine interface code. */
inter = serial->interface->altsetting->desc.bInterfaceNumber;
if (inter == 0) {
priv->interface = PIT_SIOA;
} else {
priv->interface = PIT_SIOB;
}
/* BM-type devices have a bug where bcdDevice gets set
* to 0x200 when iSerialNumber is 0. */
if (version < 0x500) {
dbg("%s: something fishy - bcdDevice too low for multi-interface device",
__FUNCTION__);
}
} else if (version < 0x200) {
/* Old device. Assume its the original SIO. */
priv->chip_type = SIO;
priv->baud_base = 12000000 / 16;
priv->write_offset = 1;
} else if (version < 0x400) {
/* Assume its an FT8U232AM (or FT8U245AM) */