| /* |
| * 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. |
| * 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_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 delayed_work rx_work; |
| struct usb_serial_port *port; |
| int rx_processed; |
| unsigned long rx_bytes; |
| |
| __u16 interface; /* FT2232C port interface (0 for FT232/245) */ |
| |
| speed_t 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; |
| }; |
| |
| /* struct ftdi_sio_quirk is used by devices requiring special attention. */ |
| struct ftdi_sio_quirk { |
| int (*probe)(struct usb_serial *); |
| void (*port_probe)(struct ftdi_private *); /* Special settings for probed ports. */ |
| }; |
| |
| static int ftdi_olimex_probe (struct usb_serial *serial); |
| static void ftdi_USB_UIRT_setup (struct ftdi_private *priv); |
| static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv); |
| |
| static struct ftdi_sio_quirk ftdi_olimex_quirk = { |
| .probe = ftdi_olimex_probe, |
| }; |
| |
| static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = { |
| .port_probe = ftdi_USB_UIRT_setup, |
| }; |
| |
| static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = { |
| .port_probe = 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) }, |
| { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) }, |
| { 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_232RL_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(FTDI_VID, FTDI_OPENDCC_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_PIEGROUP_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_USBX_707_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) }, |
| { 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_UO100_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) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_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, FTDI_CCSMACHX_2_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_SUUNTO_SPORTS_PID) }, |
| { USB_DEVICE(TTI_VID, TTI_QL355P_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_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(EVOLUTION_VID, EVO_HYBRID_PID) }, |
| { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_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) }, |
| { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) }, |
| { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) }, |
| { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) }, |
| { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) }, |
| { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID), |
| .driver_info = (kernel_ulong_t)&ftdi_olimex_quirk }, |
| { }, /* 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[] = { |
| [SIO] = "SIO", /* the serial part of FT8U100AX */ |
| [FT8U232AM] = "FT8U232AM", |
| [FT232BM] = "FT232BM", |
| [FT2232C] = "FT2232C", |
| [FT232RL] = "FT232RL", |
| }; |
| |
| |
| /* Constants for read urb and write urb */ |
| #define BUFSZ 512 |
| #define PKTSZ 64 |
| |
| /* rx_flags */ |
| #define THROTTLED 0x01 |
| #define ACTUALLY_THROTTLED 0x02 |
| |
| /* 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 void ftdi_shutdown (struct usb_serial *serial); |
| static int ftdi_sio_port_probe (struct usb_serial_port *port); |
| static int ftdi_sio_port_remove (struct usb_serial_port *port); |
| 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); |
| static void ftdi_read_bulk_callback (struct urb *urb); |
| static void ftdi_process_read (struct work_struct *work); |
| static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * 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", |
| .usb_driver = &ftdi_driver , |
| .id_table = id_table_combined, |
| .num_interrupt_in = 0, |
| .num_bulk_in = 1, |
| .num_bulk_out = 1, |
| .num_ports = 1, |
| .probe = ftdi_sio_probe, |
| .port_probe = ftdi_sio_port_probe, |
| .port_remove = ftdi_sio_port_remove, |
| .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, |
| .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 |
| |
| /* |
| * *************************************************************************** |
| * Utility 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; |
| int rv; |
| |
| if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { |
| dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__); |
| return 0; /* no change */ |
| } |
| |
| buf = kmalloc(1, GFP_NOIO); |
| if (!buf) { |
| return -ENOMEM; |
| } |
| |
| 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, |
| buf, 0, WDR_TIMEOUT); |
| |
| kfree(buf); |
| 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; |
| } |
| 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); |
| |
| 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; |
| baud = 9600; |
| 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__); |
| baud = 9600; |
| div_value = ftdi_232am_baud_to_divisor(9600); |
| div_okay = 0; |
| } |
| break; |
| case FT232BM: /* FT232BM chip */ |
| case FT2232C: /* FT2232C chip */ |
| case FT232RL: |
| 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; |
| baud = 9600; |
| } |
| 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]); |
| } |
| |
| tty_encode_baud_rate(port->tty, baud, baud); |
| 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; |
| 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) */ |
| /* (It might be a BM because of the iSerialNumber bug, |
| * but it will still work as an AM device.) */ |
| priv->chip_type = FT8U232AM; |
| } else if (version < 0x600) { |
| /* Assume its an FT232BM (or FT245BM) */ |
| priv->chip_type = FT232BM; |
| } else { |
| /* Assume its an FT232R */ |
| priv->chip_type = FT232RL; |
| } |
| info("Detected %s", ftdi_chip_name[priv->chip_type]); |
| } |
| |
| |
| /* |
| * *************************************************************************** |
| * Sysfs Attribute |
| * *************************************************************************** |
| */ |
| |
| static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct usb_serial_port *port = to_usb_serial_port(dev); |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| struct usb_device *udev = port->serial->dev; |
| unsigned short latency = 0; |
| int rv = 0; |
| |
| |
| dbg("%s",__FUNCTION__); |
| |
| rv = usb_control_msg(udev, |
| usb_rcvctrlpipe(udev, 0), |
| FTDI_SIO_GET_LATENCY_TIMER_REQUEST, |
| FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE, |
| 0, priv->interface, |
| (char*) &latency, 1, WDR_TIMEOUT); |
| |
| if (rv < 0) { |
| dev_err(dev, "Unable to read latency timer: %i\n", rv); |
| return -EIO; |
| } |
| return sprintf(buf, "%i\n", latency); |
| } |
| |
| /* Write a new value of the latency timer, in units of milliseconds. */ |
| static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf, |
| size_t count) |
| { |
| struct usb_serial_port *port = to_usb_serial_port(dev); |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| struct usb_device *udev = port->serial->dev; |
| char buf[1]; |
| int v = simple_strtoul(valbuf, NULL, 10); |
| int rv = 0; |
| |
| dbg("%s: setting latency timer = %i", __FUNCTION__, v); |
| |
| rv = usb_control_msg(udev, |
| usb_sndctrlpipe(udev, 0), |
| FTDI_SIO_SET_LATENCY_TIMER_REQUEST, |
| FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE, |
| v, priv->interface, |
| buf, 0, WDR_TIMEOUT); |
| |
| if (rv < 0) { |
| dev_err(dev, "Unable to write latency timer: %i\n", rv); |
| return -EIO; |
| } |
| |
| return count; |
| } |
| |
| /* Write an event character directly to the FTDI register. The ASCII |
| value is in the low 8 bits, with the enable bit in the 9th bit. */ |
| static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf, |
| size_t count) |
| { |
| struct usb_serial_port *port = to_usb_serial_port(dev); |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| struct usb_device *udev = port->serial->dev; |
| char buf[1]; |
| int v = simple_strtoul(valbuf, NULL, 10); |
| int rv = 0; |
| |
| dbg("%s: setting event char = %i", __FUNCTION__, v); |
| |
| rv = usb_control_msg(udev, |
| usb_sndctrlpipe(udev, 0), |
| FTDI_SIO_SET_EVENT_CHAR_REQUEST, |
| FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE, |
| v, priv->interface, |
| buf, 0, WDR_TIMEOUT); |
| |
| if (rv < 0) { |
| dbg("Unable to write event character: %i", rv); |
| return -EIO; |
| } |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer); |
| static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char); |
| |
| static int create_sysfs_attrs(struct usb_serial_port *port) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| int retval = 0; |
| |
| dbg("%s",__FUNCTION__); |
| |
| /* XXX I've no idea if the original SIO supports the event_char |
| * sysfs parameter, so I'm playing it safe. */ |
| if (priv->chip_type != SIO) { |
| dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]); |
| retval = device_create_file(&port->dev, &dev_attr_event_char); |
| if ((!retval) && |
| (priv->chip_type == FT232BM || |
| priv->chip_type == FT2232C || |
| priv->chip_type == FT232RL)) { |
| retval = device_create_file(&port->dev, |
| &dev_attr_latency_timer); |
| } |
| } |
| return retval; |
| } |
| |
| static void remove_sysfs_attrs(struct usb_serial_port *port) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| |
| dbg("%s",__FUNCTION__); |
| |
| /* XXX see create_sysfs_attrs */ |
| if (priv->chip_type != SIO) { |
| device_remove_file(&port->dev, &dev_attr_event_char); |
| if (priv->chip_type == FT232BM || |
| priv->chip_type == FT2232C || |
| priv->chip_type == FT232RL) { |
| device_remove_file(&port->dev, &dev_attr_latency_timer); |
| } |
| } |
| |
| } |
| |
| /* |
| * *************************************************************************** |
| * FTDI driver specific functions |
| * *************************************************************************** |
| */ |
| |
| /* Probe function to check for special devices */ |
| static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id) |
| { |
| struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info; |
| |
| if (quirk && quirk->probe) { |
| int ret = quirk->probe(serial); |
| if (ret != 0) |
| return ret; |
| } |
| |
| usb_set_serial_data(serial, (void *)id->driver_info); |
| |
| return 0; |
| } |
| |
| static int ftdi_sio_port_probe(struct usb_serial_port *port) |
| { |
| struct ftdi_private *priv; |
| struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial); |
| |
| |
| dbg("%s",__FUNCTION__); |
| |
| priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL); |
| if (!priv){ |
| err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private)); |
| return -ENOMEM; |
| } |
| |
| spin_lock_init(&priv->rx_lock); |
| spin_lock_init(&priv->tx_lock); |
| init_waitqueue_head(&priv->delta_msr_wait); |
| /* This will push the characters through immediately rather |
| than queue a task to deliver them */ |
| priv->flags = ASYNC_LOW_LATENCY; |
| |
| if (quirk && quirk->port_probe) |
| quirk->port_probe(priv); |
| |
| /* Increase the size of read buffers */ |
| kfree(port->bulk_in_buffer); |
| port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL); |
| if (!port->bulk_in_buffer) { |
| kfree (priv); |
| return -ENOMEM; |
| } |
| if (port->read_urb) { |
| port->read_urb->transfer_buffer = port->bulk_in_buffer; |
| port->read_urb->transfer_buffer_length = BUFSZ; |
| } |
| |
| INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read); |
| priv->port = port; |
| |
| /* Free port's existing write urb and transfer buffer. */ |
| if (port->write_urb) { |
| usb_free_urb (port->write_urb); |
| port->write_urb = NULL; |
| } |
| kfree(port->bulk_out_buffer); |
| port->bulk_out_buffer = NULL; |
| |
| usb_set_serial_port_data(port, priv); |
| |
| ftdi_determine_type (port); |
| create_sysfs_attrs(port); |
| return 0; |
| } |
| |
| /* Setup for the USB-UIRT device, which requires hardwired |
| * baudrate (38400 gets mapped to 312500) */ |
| /* Called from usbserial:serial_probe */ |
| static void ftdi_USB_UIRT_setup (struct ftdi_private *priv) |
| { |
| dbg("%s",__FUNCTION__); |
| |
| priv->flags |= ASYNC_SPD_CUST; |
| priv->custom_divisor = 77; |
| priv->force_baud = 38400; |
| } /* ftdi_USB_UIRT_setup */ |
| |
| /* Setup for the HE-TIRA1 device, which requires hardwired |
| * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */ |
| static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv) |
| { |
| dbg("%s",__FUNCTION__); |
| |
| priv->flags |= ASYNC_SPD_CUST; |
| priv->custom_divisor = 240; |
| priv->force_baud = 38400; |
| priv->force_rtscts = 1; |
| } /* ftdi_HE_TIRA1_setup */ |
| |
| /* |
| * First port on Olimex arm-usb-ocd is reserved for JTAG interface |
| * and can be accessed from userspace using openocd. |
| */ |
| static int ftdi_olimex_probe(struct usb_serial *serial) |
| { |
| struct usb_device *udev = serial->dev; |
| struct usb_interface *interface = serial->interface; |
| |
| dbg("%s",__FUNCTION__); |
| |
| if (interface == udev->actconfig->interface[0]) { |
| info("Ignoring reserved serial port on Olimex arm-usb-ocd\n"); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| /* ftdi_shutdown is called from usbserial:usb_serial_disconnect |
| * it is called when the usb device is disconnected |
| * |
| * usbserial:usb_serial_disconnect |
| * calls __serial_close for each open of the port |
| * shutdown is called then (ie ftdi_shutdown) |
| */ |
| static void ftdi_shutdown (struct usb_serial *serial) |
| { |
| dbg("%s", __FUNCTION__); |
| } |
| |
| static int ftdi_sio_port_remove(struct usb_serial_port *port) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| |
| dbg("%s", __FUNCTION__); |
| |
| remove_sysfs_attrs(port); |
| |
| /* all open ports are closed at this point |
| * (by usbserial.c:__serial_close, which calls ftdi_close) |
| */ |
| |
| if (priv) { |
| usb_set_serial_port_data(port, NULL); |
| kfree(priv); |
| } |
| |
| return 0; |
| } |
| |
| static int ftdi_open (struct usb_serial_port *port, struct file *filp) |
| { /* ftdi_open */ |
| struct usb_device *dev = port->serial->dev; |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| unsigned long flags; |
| |
| int result = 0; |
| char buf[1]; /* Needed for the usb_control_msg I think */ |
| |
| dbg("%s", __FUNCTION__); |
| |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| priv->tx_bytes = 0; |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| spin_lock_irqsave(&priv->rx_lock, flags); |
| priv->rx_bytes = 0; |
| spin_unlock_irqrestore(&priv->rx_lock, flags); |
| |
| if (port->tty) |
| port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
| |
| /* No error checking for this (will get errors later anyway) */ |
| /* See ftdi_sio.h for description of what is reset */ |
| usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE, |
| FTDI_SIO_RESET_SIO, |
| priv->interface, buf, 0, WDR_TIMEOUT); |
| |
| /* Termios defaults are set by usb_serial_init. We don't change |
| port->tty->termios - this would loose speed settings, etc. |
| This is same behaviour as serial.c/rs_open() - Kuba */ |
| |
| /* ftdi_set_termios will send usb control messages */ |
| if (port->tty) |
| ftdi_set_termios(port, port->tty->termios); |
| |
| /* FIXME: Flow control might be enabled, so it should be checked - |
| we have no control of defaults! */ |
| /* Turn on RTS and DTR since we are not flow controlling by default */ |
| set_mctrl(port, TIOCM_DTR | TIOCM_RTS); |
| |
| /* Not throttled */ |
| spin_lock_irqsave(&priv->rx_lock, flags); |
| priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); |
| spin_unlock_irqrestore(&priv->rx_lock, flags); |
| |
| /* Start reading from the device */ |
| priv->rx_processed = 0; |
| usb_fill_bulk_urb(port->read_urb, dev, |
| usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress), |
| port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, |
| ftdi_read_bulk_callback, port); |
| result = usb_submit_urb(port->read_urb, GFP_KERNEL); |
| if (result) |
| err("%s - failed submitting read urb, error %d", __FUNCTION__, result); |
| |
| |
| return result; |
| } /* ftdi_open */ |
| |
| |
| |
| /* |
| * usbserial:__serial_close only calls ftdi_close if the point is open |
| * |
| * This only gets called when it is the last close |
| * |
| * |
| */ |
| |
| static void ftdi_close (struct usb_serial_port *port, struct file *filp) |
| { /* ftdi_close */ |
| unsigned int c_cflag = port->tty->termios->c_cflag; |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| char buf[1]; |
| |
| dbg("%s", __FUNCTION__); |
| |
| if (c_cflag & HUPCL){ |
| /* Disable flow control */ |
| if (usb_control_msg(port->serial->dev, |
| usb_sndctrlpipe(port->serial->dev, 0), |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST, |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, |
| 0, priv->interface, buf, 0, |
| WDR_TIMEOUT) < 0) { |
| err("error from flowcontrol urb"); |
| } |
| |
| /* drop RTS and DTR */ |
| clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); |
| } /* Note change no line if hupcl is off */ |
| |
| /* cancel any scheduled reading */ |
| cancel_delayed_work(&priv->rx_work); |
| flush_scheduled_work(); |
| |
| /* shutdown our bulk read */ |
| usb_kill_urb(port->read_urb); |
| } /* ftdi_close */ |
| |
| |
| |
| /* The SIO requires the first byte to have: |
| * B0 1 |
| * B1 0 |
| * B2..7 length of message excluding byte 0 |
| * |
| * The new devices do not require this byte |
| */ |
| static int ftdi_write (struct usb_serial_port *port, |
| const unsigned char *buf, int count) |
| { /* ftdi_write */ |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| struct urb *urb; |
| unsigned char *buffer; |
| int data_offset ; /* will be 1 for the SIO and 0 otherwise */ |
| int status; |
| int transfer_size; |
| unsigned long flags; |
| |
| dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count); |
| |
| if (count == 0) { |
| dbg("write request of 0 bytes"); |
| return 0; |
| } |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) { |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| dbg("%s - write limit hit\n", __FUNCTION__); |
| return 0; |
| } |
| priv->tx_outstanding_urbs++; |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| |
| data_offset = priv->write_offset; |
| dbg("data_offset set to %d",data_offset); |
| |
| /* Determine total transfer size */ |
| transfer_size = count; |
| if (data_offset > 0) { |
| /* Original sio needs control bytes too... */ |
| transfer_size += (data_offset * |
| ((count + (PKTSZ - 1 - data_offset)) / |
| (PKTSZ - data_offset))); |
| } |
| |
| buffer = kmalloc (transfer_size, GFP_ATOMIC); |
| if (!buffer) { |
| err("%s ran out of kernel memory for urb ...", __FUNCTION__); |
| count = -ENOMEM; |
| goto error_no_buffer; |
| } |
| |
| urb = usb_alloc_urb(0, GFP_ATOMIC); |
| if (!urb) { |
| err("%s - no more free urbs", __FUNCTION__); |
| count = -ENOMEM; |
| goto error_no_urb; |
| } |
| |
| /* Copy data */ |
| if (data_offset > 0) { |
| /* Original sio requires control byte at start of each packet. */ |
| int user_pktsz = PKTSZ - data_offset; |
| int todo = count; |
| unsigned char *first_byte = buffer; |
| const unsigned char *current_position = buf; |
| |
| while (todo > 0) { |
| if (user_pktsz > todo) { |
| user_pktsz = todo; |
| } |
| /* Write the control byte at the front of the packet*/ |
| *first_byte = 1 | ((user_pktsz) << 2); |
| /* Copy data for packet */ |
| memcpy (first_byte + data_offset, |
| current_position, user_pktsz); |
| first_byte += user_pktsz + data_offset; |
| current_position += user_pktsz; |
| todo -= user_pktsz; |
| } |
| } else { |
| /* No control byte required. */ |
| /* Copy in the data to send */ |
| memcpy (buffer, buf, count); |
| } |
| |
| usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer); |
| |
| /* fill the buffer and send it */ |
| usb_fill_bulk_urb(urb, port->serial->dev, |
| usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), |
| buffer, transfer_size, |
| ftdi_write_bulk_callback, port); |
| |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| if (status) { |
| err("%s - failed submitting write urb, error %d", __FUNCTION__, status); |
| count = status; |
| goto error; |
| } else { |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| priv->tx_outstanding_bytes += count; |
| priv->tx_bytes += count; |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| } |
| |
| /* we are done with this urb, so let the host driver |
| * really free it when it is finished with it */ |
| usb_free_urb(urb); |
| |
| dbg("%s write returning: %d", __FUNCTION__, count); |
| return count; |
| error: |
| usb_free_urb(urb); |
| error_no_urb: |
| kfree (buffer); |
| error_no_buffer: |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| priv->tx_outstanding_urbs--; |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| return count; |
| } /* ftdi_write */ |
| |
| |
| /* This function may get called when the device is closed */ |
| |
| static void ftdi_write_bulk_callback (struct urb *urb) |
| { |
| unsigned long flags; |
| struct usb_serial_port *port = (struct usb_serial_port *)urb->context; |
| struct ftdi_private *priv; |
| int data_offset; /* will be 1 for the SIO and 0 otherwise */ |
| unsigned long countback; |
| int status = urb->status; |
| |
| /* free up the transfer buffer, as usb_free_urb() does not do this */ |
| kfree (urb->transfer_buffer); |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (status) { |
| dbg("nonzero write bulk status received: %d", status); |
| return; |
| } |
| |
| priv = usb_get_serial_port_data(port); |
| if (!priv) { |
| dbg("%s - bad port private data pointer - exiting", __FUNCTION__); |
| return; |
| } |
| /* account for transferred data */ |
| countback = urb->actual_length; |
| data_offset = priv->write_offset; |
| if (data_offset > 0) { |
| /* Subtract the control bytes */ |
| countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ)); |
| } |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| --priv->tx_outstanding_urbs; |
| priv->tx_outstanding_bytes -= countback; |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| |
| usb_serial_port_softint(port); |
| } /* ftdi_write_bulk_callback */ |
| |
| |
| static int ftdi_write_room( struct usb_serial_port *port ) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| int room; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) { |
| /* |
| * We really can take anything the user throws at us |
| * but let's pick a nice big number to tell the tty |
| * layer that we have lots of free space |
| */ |
| room = 2048; |
| } else { |
| room = 0; |
| } |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| return room; |
| } /* ftdi_write_room */ |
| |
| |
| static int ftdi_chars_in_buffer (struct usb_serial_port *port) |
| { /* ftdi_chars_in_buffer */ |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| int buffered; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| spin_lock_irqsave(&priv->tx_lock, flags); |
| buffered = (int)priv->tx_outstanding_bytes; |
| spin_unlock_irqrestore(&priv->tx_lock, flags); |
| if (buffered < 0) { |
| err("%s outstanding tx bytes is negative!", __FUNCTION__); |
| buffered = 0; |
| } |
| return buffered; |
| } /* ftdi_chars_in_buffer */ |
| |
| |
| |
| static void ftdi_read_bulk_callback (struct urb *urb) |
| { /* ftdi_read_bulk_callback */ |
| struct usb_serial_port *port = (struct usb_serial_port *)urb->context; |
| struct tty_struct *tty; |
| struct ftdi_private *priv; |
| unsigned long countread; |
| unsigned long flags; |
| int status = urb->status; |
| |
| if (urb->number_of_packets > 0) { |
| err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__, |
| urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets ); |
| err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags ); |
| } |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (port->open_count <= 0) |
| return; |
| |
| tty = port->tty; |
| if (!tty) { |
| dbg("%s - bad tty pointer - exiting",__FUNCTION__); |
| return; |
| } |
| |
| priv = usb_get_serial_port_data(port); |
| if (!priv) { |
| dbg("%s - bad port private data pointer - exiting", __FUNCTION__); |
| return; |
| } |
| |
| if (urb != port->read_urb) { |
| err("%s - Not my urb!", __FUNCTION__); |
| } |
| |
| if (status) { |
| /* This will happen at close every time so it is a dbg not an err */ |
| dbg("(this is ok on close) nonzero read bulk status received: " |
| "%d", status); |
| return; |
| } |
| |
| /* count data bytes, but not status bytes */ |
| countread = urb->actual_length; |
| countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ); |
| spin_lock_irqsave(&priv->rx_lock, flags); |
| priv->rx_bytes += countread; |
| spin_unlock_irqrestore(&priv->rx_lock, flags); |
| |
| ftdi_process_read(&priv->rx_work.work); |
| |
| } /* ftdi_read_bulk_callback */ |
| |
| |
| static void ftdi_process_read (struct work_struct *work) |
| { /* ftdi_process_read */ |
| struct ftdi_private *priv = |
| container_of(work, struct ftdi_private, rx_work.work); |
| struct usb_serial_port *port = priv->port; |
| struct urb *urb; |
| struct tty_struct *tty; |
| char error_flag; |
| unsigned char *data; |
| |
| int i; |
| int result; |
| int need_flip; |
| int packet_offset; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (port->open_count <= 0) |
| return; |
| |
| tty = port->tty; |
| if (!tty) { |
| dbg("%s - bad tty pointer - exiting",__FUNCTION__); |
| return; |
| } |
| |
| priv = usb_get_serial_port_data(port); |
| if (!priv) { |
| dbg("%s - bad port private data pointer - exiting", __FUNCTION__); |
| return; |
| } |
| |
| urb = port->read_urb; |
| if (!urb) { |
| dbg("%s - bad read_urb pointer - exiting", __FUNCTION__); |
| return; |
| } |
| |
| data = urb->transfer_buffer; |
| |
| if (priv->rx_processed) { |
| dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__, |
| priv->rx_processed, |
| urb->actual_length - priv->rx_processed); |
| } else { |
| /* The first two bytes of every read packet are status */ |
| if (urb->actual_length > 2) { |
| usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); |
| } else { |
| dbg("Status only: %03oo %03oo",data[0],data[1]); |
| } |
| } |
| |
| |
| /* TO DO -- check for hung up line and handle appropriately: */ |
| /* send hangup */ |
| /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */ |
| /* if CD is dropped and the line is not CLOCAL then we should hangup */ |
| |
| need_flip = 0; |
| for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) { |
| int length; |
| |
| /* Compare new line status to the old one, signal if different */ |
| /* N.B. packet may be processed more than once, but differences |
| * are only processed once. */ |
| if (priv != NULL) { |
| char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK; |
| if (new_status != priv->prev_status) { |
| priv->diff_status |= new_status ^ priv->prev_status; |
| wake_up_interruptible(&priv->delta_msr_wait); |
| priv->prev_status = new_status; |
| } |
| } |
| |
| length = min(PKTSZ, urb->actual_length-packet_offset)-2; |
| if (length < 0) { |
| err("%s - bad packet length: %d", __FUNCTION__, length+2); |
| length = 0; |
| } |
| |
| if (priv->rx_flags & THROTTLED) { |
| dbg("%s - throttled", __FUNCTION__); |
| break; |
| } |
| if (tty_buffer_request_room(tty, length) < length) { |
| /* break out & wait for throttling/unthrottling to happen */ |
| dbg("%s - receive room low", __FUNCTION__); |
| break; |
| } |
| |
| /* Handle errors and break */ |
| error_flag = TTY_NORMAL; |
| /* Although the device uses a bitmask and hence can have multiple */ |
| /* errors on a packet - the order here sets the priority the */ |
| /* error is returned to the tty layer */ |
| |
| if ( data[packet_offset+1] & FTDI_RS_OE ) { |
| error_flag = TTY_OVERRUN; |
| dbg("OVERRRUN error"); |
| } |
| if ( data[packet_offset+1] & FTDI_RS_BI ) { |
| error_flag = TTY_BREAK; |
| dbg("BREAK received"); |
| } |
| if ( data[packet_offset+1] & FTDI_RS_PE ) { |
| error_flag = TTY_PARITY; |
| dbg("PARITY error"); |
| } |
| if ( data[packet_offset+1] & FTDI_RS_FE ) { |
| error_flag = TTY_FRAME; |
| dbg("FRAMING error"); |
| } |
| if (length > 0) { |
| for (i = 2; i < length+2; i++) { |
| /* Note that the error flag is duplicated for |
| every character received since we don't know |
| which character it applied to */ |
| tty_insert_flip_char(tty, data[packet_offset+i], error_flag); |
| } |
| need_flip = 1; |
| } |
| |
| #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW |
| /* if a parity error is detected you get status packets forever |
| until a character is sent without a parity error. |
| This doesn't work well since the application receives a never |
| ending stream of bad data - even though new data hasn't been sent. |
| Therefore I (bill) have taken this out. |
| However - this might make sense for framing errors and so on |
| so I am leaving the code in for now. |
| */ |
| else { |
| if (error_flag != TTY_NORMAL){ |
| dbg("error_flag is not normal"); |
| /* In this case it is just status - if that is an error send a bad character */ |
| if(tty->flip.count >= TTY_FLIPBUF_SIZE) { |
| tty_flip_buffer_push(tty); |
| } |
| tty_insert_flip_char(tty, 0xff, error_flag); |
| need_flip = 1; |
| } |
| } |
| #endif |
| } /* "for(packet_offset=0..." */ |
| |
| /* Low latency */ |
| if (need_flip) { |
| tty_flip_buffer_push(tty); |
| } |
| |
| if (packet_offset < urb->actual_length) { |
| /* not completely processed - record progress */ |
| priv->rx_processed = packet_offset; |
| dbg("%s - incomplete, %d bytes processed, %d remain", |
| __FUNCTION__, packet_offset, |
| urb->actual_length - packet_offset); |
| /* check if we were throttled while processing */ |
| spin_lock_irqsave(&priv->rx_lock, flags); |
| if (priv->rx_flags & THROTTLED) { |
| priv->rx_flags |= ACTUALLY_THROTTLED; |
| spin_unlock_irqrestore(&priv->rx_lock, flags); |
| dbg("%s - deferring remainder until unthrottled", |
| __FUNCTION__); |
| return; |
| } |
| spin_unlock_irqrestore(&priv->rx_lock, flags); |
| /* if the port is closed stop trying to read */ |
| if (port->open_count > 0){ |
| /* delay processing of remainder */ |
| schedule_delayed_work(&priv->rx_work, 1); |
| } else { |
| dbg("%s - port is closed", __FUNCTION__); |
| } |
| return; |
| } |
| |
| /* urb is completely processed */ |
| priv->rx_processed = 0; |
| |
| /* if the port is closed stop trying to read */ |
| if (port->open_count > 0){ |
| /* Continue trying to always read */ |
| usb_fill_bulk_urb(port->read_urb, port->serial->dev, |
| usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), |
| port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, |
| ftdi_read_bulk_callback, port); |
| |
| result = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| if (result) |
| err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); |
| } |
| |
| return; |
| } /* ftdi_process_read */ |
| |
| |
| static void ftdi_break_ctl( struct usb_serial_port *port, int break_state ) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| __u16 urb_value = 0; |
| char buf[1]; |
| |
| /* break_state = -1 to turn on break, and 0 to turn off break */ |
| /* see drivers/char/tty_io.c to see it used */ |
| /* last_set_data_urb_value NEVER has the break bit set in it */ |
| |
| if (break_state) { |
| urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK; |
| } else { |
| urb_value = priv->last_set_data_urb_value; |
| } |
| |
| |
| if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
| FTDI_SIO_SET_DATA_REQUEST, |
| FTDI_SIO_SET_DATA_REQUEST_TYPE, |
| urb_value , priv->interface, |
| buf, 0, WDR_TIMEOUT) < 0) { |
| err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state); |
| } |
| |
| dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value); |
| |
| } |
| |
| |
| /* old_termios contains the original termios settings and tty->termios contains |
| * the new setting to be used |
| * WARNING: set_termios calls this with old_termios in kernel space |
| */ |
| |
| static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) |
| { /* ftdi_termios */ |
| struct usb_device *dev = port->serial->dev; |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| struct ktermios *termios = port->tty->termios; |
| unsigned int cflag = termios->c_cflag; |
| __u16 urb_value; /* will hold the new flags */ |
| char buf[1]; /* Perhaps I should dynamically alloc this? */ |
| |
| // Added for xon/xoff support |
| unsigned int iflag = termios->c_iflag; |
| unsigned char vstop; |
| unsigned char vstart; |
| |
| dbg("%s", __FUNCTION__); |
| |
| /* Force baud rate if this device requires it, unless it is set to B0. */ |
| if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) { |
| dbg("%s: forcing baud rate for this device", __FUNCTION__); |
| tty_encode_baud_rate(port->tty, priv->force_baud, |
| priv->force_baud); |
| } |
| |
| /* Force RTS-CTS if this device requires it. */ |
| if (priv->force_rtscts) { |
| dbg("%s: forcing rtscts for this device", __FUNCTION__); |
| termios->c_cflag |= CRTSCTS; |
| } |
| |
| cflag = termios->c_cflag; |
| |
| /* FIXME -For this cut I don't care if the line is really changing or |
| not - so just do the change regardless - should be able to |
| compare old_termios and tty->termios */ |
| /* NOTE These routines can get interrupted by |
| ftdi_sio_read_bulk_callback - need to examine what this |
| means - don't see any problems yet */ |
| |
| /* Set number of data bits, parity, stop bits */ |
| |
| termios->c_cflag &= ~CMSPAR; |
| |
| urb_value = 0; |
| urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : |
| FTDI_SIO_SET_DATA_STOP_BITS_1); |
| urb_value |= (cflag & PARENB ? |
| (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD : |
| FTDI_SIO_SET_DATA_PARITY_EVEN) : |
| FTDI_SIO_SET_DATA_PARITY_NONE); |
| if (cflag & CSIZE) { |
| switch (cflag & CSIZE) { |
| case CS5: urb_value |= 5; dbg("Setting CS5"); break; |
| case CS6: urb_value |= 6; dbg("Setting CS6"); break; |
| case CS7: urb_value |= 7; dbg("Setting CS7"); break; |
| case CS8: urb_value |= 8; dbg("Setting CS8"); break; |
| default: |
| err("CSIZE was set but not CS5-CS8"); |
| } |
| } |
| |
| /* This is needed by the break command since it uses the same command - but is |
| * or'ed with this value */ |
| priv->last_set_data_urb_value = urb_value; |
| |
| if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| FTDI_SIO_SET_DATA_REQUEST, |
| FTDI_SIO_SET_DATA_REQUEST_TYPE, |
| urb_value , priv->interface, |
| buf, 0, WDR_SHORT_TIMEOUT) < 0) { |
| err("%s FAILED to set databits/stopbits/parity", __FUNCTION__); |
| } |
| |
| /* Now do the baudrate */ |
| if ((cflag & CBAUD) == B0 ) { |
| /* Disable flow control */ |
| if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST, |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, |
| 0, priv->interface, |
| buf, 0, WDR_TIMEOUT) < 0) { |
| err("%s error from disable flowcontrol urb", __FUNCTION__); |
| } |
| /* Drop RTS and DTR */ |
| clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); |
| } else { |
| /* set the baudrate determined before */ |
| if (change_speed(port)) { |
| err("%s urb failed to set baudrate", __FUNCTION__); |
| } |
| /* Ensure RTS and DTR are raised when baudrate changed from 0 */ |
| if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) { |
| set_mctrl(port, TIOCM_DTR | TIOCM_RTS); |
| } |
| } |
| |
| /* Set flow control */ |
| /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ |
| if (cflag & CRTSCTS) { |
| dbg("%s Setting to CRTSCTS flow control", __FUNCTION__); |
| if (usb_control_msg(dev, |
| usb_sndctrlpipe(dev, 0), |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST, |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, |
| 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface), |
| buf, 0, WDR_TIMEOUT) < 0) { |
| err("urb failed to set to rts/cts flow control"); |
| } |
| |
| } else { |
| /* |
| * Xon/Xoff code |
| * |
| * Check the IXOFF status in the iflag component of the termios structure |
| * if IXOFF is not set, the pre-xon/xoff code is executed. |
| */ |
| if (iflag & IXOFF) { |
| dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag); |
| // Try to enable the XON/XOFF on the ftdi_sio |
| // Set the vstart and vstop -- could have been done up above where |
| // a lot of other dereferencing is done but that would be very |
| // inefficient as vstart and vstop are not always needed |
| vstart = termios->c_cc[VSTART]; |
| vstop = termios->c_cc[VSTOP]; |
| urb_value=(vstop << 8) | (vstart); |
| |
| if (usb_control_msg(dev, |
| usb_sndctrlpipe(dev, 0), |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST, |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, |
| urb_value , (FTDI_SIO_XON_XOFF_HS |
| | priv->interface), |
| buf, 0, WDR_TIMEOUT) < 0) { |
| err("urb failed to set to xon/xoff flow control"); |
| } |
| } else { |
| /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */ |
| /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */ |
| dbg("%s Turning off hardware flow control", __FUNCTION__); |
| if (usb_control_msg(dev, |
| usb_sndctrlpipe(dev, 0), |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST, |
| FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, |
| 0, priv->interface, |
| buf, 0, WDR_TIMEOUT) < 0) { |
| err("urb failed to clear flow control"); |
| } |
| } |
| |
| } |
| return; |
| } /* ftdi_termios */ |
| |
| |
| static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| unsigned char buf[2]; |
| int ret; |
| |
| dbg("%s TIOCMGET", __FUNCTION__); |
| switch (priv->chip_type) { |
| case SIO: |
| /* Request the status from the device */ |
| if ((ret = usb_control_msg(port->serial->dev, |
| usb_rcvctrlpipe(port->serial->dev, 0), |
| FTDI_SIO_GET_MODEM_STATUS_REQUEST, |
| FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, |
| 0, 0, |
| buf, 1, WDR_TIMEOUT)) < 0 ) { |
| err("%s Could not get modem status of device - err: %d", __FUNCTION__, |
| ret); |
| return(ret); |
| } |
| break; |
| case FT8U232AM: |
| case FT232BM: |
| case FT2232C: |
| case FT232RL: |
| /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same |
| format as the data returned from the in point */ |
| if ((ret = usb_control_msg(port->serial->dev, |
| usb_rcvctrlpipe(port->serial->dev, 0), |
| FTDI_SIO_GET_MODEM_STATUS_REQUEST, |
| FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, |
| 0, priv->interface, |
| buf, 2, WDR_TIMEOUT)) < 0 ) { |
| err("%s Could not get modem status of device - err: %d", __FUNCTION__, |
| ret); |
| return(ret); |
| } |
| break; |
| default: |
| return -EFAULT; |
| break; |
| } |
| |
| return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) | |
| (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) | |
| (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) | |
| (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) | |
| priv->last_dtr_rts; |
| } |
| |
| static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear) |
| { |
| dbg("%s TIOCMSET", __FUNCTION__); |
| return update_mctrl(port, set, clear); |
| } |
| |
| |
| static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| |
| dbg("%s cmd 0x%04x", __FUNCTION__, cmd); |
| |
| /* Based on code from acm.c and others */ |
| switch (cmd) { |
| |
| case TIOCGSERIAL: /* gets serial port data */ |
| return get_serial_info(port, (struct serial_struct __user *) arg); |
| |
| case TIOCSSERIAL: /* sets serial port data */ |
| return set_serial_info(port, (struct serial_struct __user *) arg); |
| |
| /* |
| * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change |
| * - mask passed in arg for lines of interest |
| * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) |
| * Caller should use TIOCGICOUNT to see which one it was. |
| * |
| * This code is borrowed from linux/drivers/char/serial.c |
| */ |
| case TIOCMIWAIT: |
| while (priv != NULL) { |
| interruptible_sleep_on(&priv->delta_msr_wait); |
| /* see if a signal did it */ |
| if (signal_pending(current)) |
| return -ERESTARTSYS; |
| else { |
| char diff = priv->diff_status; |
| |
| if (diff == 0) { |
| return -EIO; /* no change => error */ |
| } |
| |
| /* Consume all events */ |
| priv->diff_status = 0; |
| |
| /* Return 0 if caller wanted to know about these bits */ |
| if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) || |
| ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) || |
| ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) || |
| ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) { |
| return 0; |
| } |
| /* |
| * Otherwise caller can't care less about what happened, |
| * and so we continue to wait for more events. |
| */ |
| } |
| } |
| return(0); |
| break; |
| default: |
| break; |
| |
| } |
| |
| |
| /* This is not necessarily an error - turns out the higher layers will do |
| * some ioctls itself (see comment above) |
| */ |
| dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd); |
| |
| return(-ENOIOCTLCMD); |
| } /* ftdi_ioctl */ |
| |
| |
| static void ftdi_throttle (struct usb_serial_port *port) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| unsigned long flags; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| spin_lock_irqsave(&priv->rx_lock, flags); |
| priv->rx_flags |= THROTTLED; |
| spin_unlock_irqrestore(&priv->rx_lock, flags); |
| } |
| |
| |
| static void ftdi_unthrottle (struct usb_serial_port *port) |
| { |
| struct ftdi_private *priv = usb_get_serial_port_data(port); |
| int actually_throttled; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| spin_lock_irqsave(&priv->rx_lock, flags); |
| actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
| priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); |
| spin_unlock_irqrestore(&priv->rx_lock, flags); |
| |
| if (actually_throttled) |
| schedule_delayed_work(&priv->rx_work, 0); |
| } |
| |
| static int __init ftdi_init (void) |
| { |
| int retval; |
| |
| dbg("%s", __FUNCTION__); |
| if (vendor > 0 && product > 0) { |
| /* Add user specified VID/PID to reserved element of table. */ |
| int i; |
| for (i = 0; id_table_combined[i].idVendor; i++) |
| ; |
| id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; |
| id_table_combined[i].idVendor = vendor; |
| id_table_combined[i].idProduct = product; |
| } |
| retval = usb_serial_register(&ftdi_sio_device); |
| if (retval) |
| goto failed_sio_register; |
| retval = usb_register(&ftdi_driver); |
| if (retval) |
| goto failed_usb_register; |
| |
| info(DRIVER_VERSION ":" DRIVER_DESC); |
| return 0; |
| failed_usb_register: |
| usb_serial_deregister(&ftdi_sio_device); |
| failed_sio_register: |
| return retval; |
| } |
| |
| |
| static void __exit ftdi_exit (void) |
| { |
| |
| dbg("%s", __FUNCTION__); |
| |
| usb_deregister (&ftdi_driver); |
| usb_serial_deregister (&ftdi_sio_device); |
| |
| } |
| |
| |
| module_init(ftdi_init); |
| module_exit(ftdi_exit); |
| |
| MODULE_AUTHOR( DRIVER_AUTHOR ); |
| MODULE_DESCRIPTION( DRIVER_DESC ); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug enabled or not"); |
| module_param(vendor, ushort, 0); |
| MODULE_PARM_DESC(vendor, "User specified vendor ID (default=" |
| __MODULE_STRING(FTDI_VID)")"); |
| module_param(product, ushort, 0); |
| MODULE_PARM_DESC(vendor, "User specified product ID"); |
| |