1 /* 2 * USB FTDI SIO driver 3 * 4 * Copyright (C) 1999 - 2001 5 * Greg Kroah-Hartman (greg@kroah.com) 6 * Bill Ryder (bryder@sgi.com) 7 * Copyright (C) 2002 8 * Kuba Ober (kuba@mareimbrium.org) 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * See Documentation/usb/usb-serial.txt for more information on using this driver 16 * 17 * See http://ftdi-usb-sio.sourceforge.net for upto date testing info 18 * and extra documentation 19 * 20 * (21/Jul/2004) Ian Abbott 21 * Incorporated Steven Turner's code to add support for the FT2232C chip. 22 * The prelimilary port to the 2.6 kernel was by Rus V. Brushkoff. I have 23 * fixed a couple of things. 24 * 25 * (27/May/2004) Ian Abbott 26 * Improved throttling code, mostly stolen from the WhiteHEAT driver. 27 * 28 * (26/Mar/2004) Jan Capek 29 * Added PID's for ICD-U20/ICD-U40 - incircuit PIC debuggers from CCS Inc. 30 * 31 * (09/Feb/2004) Ian Abbott 32 * Changed full name of USB-UIRT device to avoid "/" character. 33 * Added FTDI's alternate PID (0x6006) for FT232/245 devices. 34 * Added PID for "ELV USB Module UO100" from Stefan Frings. 35 * 36 * (21/Oct/2003) Ian Abbott 37 * Renamed some VID/PID macros for Matrix Orbital and Perle Systems 38 * devices. Removed Matrix Orbital and Perle Systems devices from the 39 * 8U232AM device table, but left them in the FT232BM table, as they are 40 * known to use only FT232BM. 41 * 42 * (17/Oct/2003) Scott Allen 43 * Added vid/pid for Perle Systems UltraPort USB serial converters 44 * 45 * (21/Sep/2003) Ian Abbott 46 * Added VID/PID for Omnidirectional Control Technology US101 USB to 47 * RS-232 adapter (also rebadged as Dick Smith Electronics XH6381). 48 * VID/PID supplied by Donald Gordon. 49 * 50 * (19/Aug/2003) Ian Abbott 51 * Freed urb's transfer buffer in write bulk callback. 52 * Omitted some paranoid checks in write bulk callback that don't matter. 53 * Scheduled work in write bulk callback regardless of port's open count. 54 * 55 * (05/Aug/2003) Ian Abbott 56 * Added VID/PID for ID TECH IDT1221U USB to RS-232 adapter. 57 * VID/PID provided by Steve Briggs. 58 * 59 * (23/Jul/2003) Ian Abbott 60 * Added PIDs for CrystalFontz 547, 633, 631, 635, 640 and 640 from 61 * Wayne Wylupski. 62 * 63 * (10/Jul/2003) David Glance 64 * Added PID for DSS-20 SyncStation cradle for Sony-Ericsson P800. 65 * 66 * (27/Jun/2003) Ian Abbott 67 * Reworked the urb handling logic. We have no more pool, but dynamically 68 * allocate the urb and the transfer buffer on the fly. In testing this 69 * does not incure any measurable overhead. This also relies on the fact 70 * that we have proper reference counting logic for urbs. I nicked this 71 * from Greg KH's Visor driver. 72 * 73 * (23/Jun/2003) Ian Abbott 74 * Reduced flip buffer pushes and corrected a data length test in 75 * ftdi_read_bulk_callback. 76 * Defererence pointers after any paranoid checks, not before. 77 * 78 * (21/Jun/2003) Erik Nygren 79 * Added support for Home Electronics Tira-1 IR transceiver using FT232BM chip. 80 * See <http://www.home-electro.com/tira1.htm>. Only operates properly 81 * at 100000 and RTS-CTS, so set custom divisor mode on startup. 82 * Also force the Tira-1 and USB-UIRT to only use their custom baud rates. 83 * 84 * (18/Jun/2003) Ian Abbott 85 * Added Device ID of the USB relais from Rudolf Gugler (backported from 86 * Philipp G�hring's patch for 2.5.x kernel). 87 * Moved read transfer buffer reallocation into startup function. 88 * Free existing write urb and transfer buffer in startup function. 89 * Only use urbs in write urb pool that were successfully allocated. 90 * Moved some constant macros out of functions. 91 * Minor whitespace and comment changes. 92 * 93 * (12/Jun/2003) David Norwood 94 * Added support for USB-UIRT IR transceiver using 8U232AM chip. 95 * See <http://home.earthlink.net/~jrhees/USBUIRT/index.htm>. Only 96 * operates properly at 312500, so set custom divisor mode on startup. 97 * 98 * (12/Jun/2003) Ian Abbott 99 * Added Sealevel SeaLINK+ 210x, 220x, 240x, 280x vid/pids from Tuan Hoang 100 * - I've eliminated some that don't seem to exist! 101 * Added Home Electronics Tira-1 IR transceiver pid from Chris Horn 102 * Some whitespace/coding-style cleanups 103 * 104 * (11/Jun/2003) Ian Abbott 105 * Fixed unsafe spinlock usage in ftdi_write 106 * 107 * (24/Feb/2003) Richard Shooter 108 * Increase read buffer size to improve read speeds at higher baud rates 109 * (specifically tested with up to 1Mb/sec at 1.5M baud) 110 * 111 * (23/Feb/2003) John Wilkins 112 * Added Xon/xoff flow control (activating support in the ftdi device) 113 * Added vid/pid for Videonetworks/Homechoice (UK ISP) 114 * 115 * (23/Feb/2003) Bill Ryder 116 * Added matrix orb device vid/pids from Wayne Wylupski 117 * 118 * (19/Feb/2003) Ian Abbott 119 * For TIOCSSERIAL, set alt_speed to 0 when ASYNC_SPD_MASK value has 120 * changed to something other than ASYNC_SPD_HI, ASYNC_SPD_VHI, 121 * ASYNC_SPD_SHI or ASYNC_SPD_WARP. Also, unless ASYNC_SPD_CUST is in 122 * force, don't bother changing baud rate when custom_divisor has changed. 123 * 124 * (18/Feb/2003) Ian Abbott 125 * Fixed TIOCMGET handling to include state of DTR and RTS, the state 126 * of which are now saved by set_dtr() and set_rts(). 127 * Fixed improper storage class for buf in set_dtr() and set_rts(). 128 * Added FT232BM chip type and support for its extra baud rates (compared 129 * to FT8U232AM). 130 * Took account of special case divisor values for highest baud rates of 131 * FT8U232AM and FT232BM. 132 * For TIOCSSERIAL, forced alt_speed to 0 when ASYNC_SPD_CUST kludge used, 133 * as previous alt_speed setting is now stale. 134 * Moved startup code common between the startup routines for the 135 * different chip types into a common subroutine. 136 * 137 * (17/Feb/2003) Bill Ryder 138 * Added write urb buffer pool on a per device basis 139 * Added more checking for open file on callbacks (fixed OOPS) 140 * Added CrystalFontz 632 and 634 PIDs 141 * (thanx to CrystalFontz for the sample devices - they flushed out 142 * some driver bugs) 143 * Minor debugging message changes 144 * Added throttle, unthrottle and chars_in_buffer functions 145 * Fixed FTDI_SIO (the original device) bug 146 * Fixed some shutdown handling 147 * 148 * 149 * 150 * 151 * (07/Jun/2002) Kuba Ober 152 * Changed FTDI_SIO_BASE_BAUD_TO_DIVISOR macro into ftdi_baud_to_divisor 153 * function. It was getting too complex. 154 * Fix the divisor calculation logic which was setting divisor of 0.125 155 * instead of 0.5 for fractional parts of divisor equal to 5/8, 6/8, 7/8. 156 * Also make it bump up the divisor to next integer in case of 7/8 - it's 157 * a better approximation. 158 * 159 * (25/Jul/2002) Bill Ryder inserted Dmitri's TIOCMIWAIT patch 160 * Not tested by me but it doesn't break anything I use. 161 * 162 * (04/Jan/2002) Kuba Ober 163 * Implemented 38400 baudrate kludge, where it can be substituted with other 164 * values. That's the only way to set custom baudrates. 165 * Implemented TIOCSSERIAL, TIOCGSERIAL ioctl's so that setserial is happy. 166 * FIXME: both baudrate things should eventually go to usbserial.c as other 167 * devices may need that functionality too. Actually, it can probably be 168 * merged in serial.c somehow - too many drivers repeat this code over 169 * and over. 170 * Fixed baudrate forgetfulness - open() used to reset baudrate to 9600 every time. 171 * Divisors for baudrates are calculated by a macro. 172 * Small code cleanups. Ugly whitespace changes for Plato's sake only ;-]. 173 * 174 * (04/Nov/2001) Bill Ryder 175 * Fixed bug in read_bulk_callback where incorrect urb buffer was used. 176 * Cleaned up write offset calculation 177 * Added write_room since default values can be incorrect for sio 178 * Changed write_bulk_callback to use same queue_task as other drivers 179 * (the previous version caused panics) 180 * Removed port iteration code since the device only has one I/O port and it 181 * was wrong anyway. 182 * 183 * (31/May/2001) gkh 184 * Switched from using spinlock to a semaphore, which fixes lots of problems. 185 * 186 * (23/May/2001) Bill Ryder 187 * Added runtime debug patch (thanx Tyson D Sawyer). 188 * Cleaned up comments for 8U232 189 * Added parity, framing and overrun error handling 190 * Added receive break handling. 191 * 192 * (04/08/2001) gb 193 * Identify version on module load. 194 * 195 * (18/March/2001) Bill Ryder 196 * (Not released) 197 * Added send break handling. (requires kernel patch too) 198 * Fixed 8U232AM hardware RTS/CTS etc status reporting. 199 * Added flipbuf fix copied from generic device 200 * 201 * (12/3/2000) Bill Ryder 202 * Added support for 8U232AM device. 203 * Moved PID and VIDs into header file only. 204 * Turned on low-latency for the tty (device will do high baudrates) 205 * Added shutdown routine to close files when device removed. 206 * More debug and error message cleanups. 207 * 208 * (11/13/2000) Bill Ryder 209 * Added spinlock protected open code and close code. 210 * Multiple opens work (sort of - see webpage mentioned above). 211 * Cleaned up comments. Removed multiple PID/VID definitions. 212 * Factorised cts/dtr code 213 * Made use of __FUNCTION__ in dbg's 214 * 215 * (11/01/2000) Adam J. Richter 216 * usb_device_id table support 217 * 218 * (10/05/2000) gkh 219 * Fixed bug with urb->dev not being set properly, now that the usb 220 * core needs it. 221 * 222 * (09/11/2000) gkh 223 * Removed DEBUG #ifdefs with call to usb_serial_debug_data 224 * 225 * (07/19/2000) gkh 226 * Added module_init and module_exit functions to handle the fact that this 227 * driver is a loadable module now. 228 * 229 * (04/04/2000) Bill Ryder 230 * Fixed bugs in TCGET/TCSET ioctls (by removing them - they are 231 * handled elsewhere in the tty io driver chain). 232 * 233 * (03/30/2000) Bill Ryder 234 * Implemented lots of ioctls 235 * Fixed a race condition in write 236 * Changed some dbg's to errs 237 * 238 * (03/26/2000) gkh 239 * Split driver up into device specific pieces. 240 * 241 */ 242 243 /* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */ 244 /* Thanx to FTDI for so kindly providing details of the protocol required */ 245 /* to talk to the device */ 246 /* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */ 247 248 #include <linux/kernel.h> 249 #include <linux/errno.h> 250 #include <linux/init.h> 251 #include <linux/slab.h> 252 #include <linux/tty.h> 253 #include <linux/tty_driver.h> 254 #include <linux/tty_flip.h> 255 #include <linux/module.h> 256 #include <linux/spinlock.h> 257 #include <asm/uaccess.h> 258 #include <linux/usb.h> 259 #include <linux/serial.h> 260 #include <linux/usb/serial.h> 261 #include "ftdi_sio.h" 262 263 /* 264 * Version Information 265 */ 266 #define DRIVER_VERSION "v1.4.3" 267 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>" 268 #define DRIVER_DESC "USB FTDI Serial Converters Driver" 269 270 static int debug; 271 static __u16 vendor = FTDI_VID; 272 static __u16 product; 273 274 /* struct ftdi_sio_quirk is used by devices requiring special attention. */ 275 struct ftdi_sio_quirk { 276 void (*setup)(struct usb_serial *); /* Special settings during startup. */ 277 }; 278 279 static void ftdi_USB_UIRT_setup (struct usb_serial *serial); 280 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial); 281 282 static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = { 283 .setup = ftdi_USB_UIRT_setup, 284 }; 285 286 static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = { 287 .setup = ftdi_HE_TIRA1_setup, 288 }; 289 290 /* 291 * The 8U232AM has the same API as the sio except for: 292 * - it can support MUCH higher baudrates; up to: 293 * o 921600 for RS232 and 2000000 for RS422/485 at 48MHz 294 * o 230400 at 12MHz 295 * so .. 8U232AM's baudrate setting codes are different 296 * - it has a two byte status code. 297 * - it returns characters every 16ms (the FTDI does it every 40ms) 298 * 299 * the bcdDevice value is used to differentiate FT232BM and FT245BM from 300 * the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID 301 * combinations in both tables. 302 * FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices, 303 * but I don't know if those ever went into mass production. [Ian Abbott] 304 */ 305 306 307 308 static struct usb_device_id id_table_combined [] = { 309 { USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) }, 310 { USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) }, 311 { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) }, 312 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) }, 313 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) }, 314 { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) }, 315 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) }, 316 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) }, 317 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) }, 318 { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) }, 319 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) }, 320 { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) }, 321 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) }, 322 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) }, 323 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) }, 324 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) }, 325 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) }, 326 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) }, 327 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) }, 328 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) }, 329 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) }, 330 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) }, 331 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) }, 332 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) }, 333 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) }, 334 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) }, 335 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) }, 336 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) }, 337 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) }, 338 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) }, 339 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) }, 340 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) }, 341 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) }, 342 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) }, 343 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) }, 344 { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) }, 345 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) }, 346 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) }, 347 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) }, 348 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) }, 349 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) }, 350 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) }, 351 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) }, 352 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) }, 353 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) }, 354 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) }, 355 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) }, 356 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) }, 357 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) }, 358 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) }, 359 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) }, 360 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) }, 361 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) }, 362 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) }, 363 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) }, 364 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) }, 365 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) }, 366 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) }, 367 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) }, 368 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) }, 369 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) }, 370 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) }, 371 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) }, 372 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) }, 373 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) }, 374 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) }, 375 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) }, 376 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) }, 377 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) }, 378 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) }, 379 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) }, 380 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) }, 381 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) }, 382 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) }, 383 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) }, 384 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) }, 385 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) }, 386 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) }, 387 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) }, 388 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) }, 389 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) }, 390 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) }, 391 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) }, 392 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) }, 393 { USB_DEVICE(OCT_VID, OCT_US101_PID) }, 394 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID), 395 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk }, 396 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID), 397 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk }, 398 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) }, 399 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) }, 400 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) }, 401 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) }, 402 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) }, 403 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) }, 404 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) }, 405 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) }, 406 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) }, 407 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) }, 408 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) }, 409 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) }, 410 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) }, 411 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) }, 412 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) }, 413 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) }, 414 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) }, 415 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) }, 416 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) }, 417 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) }, 418 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) }, 419 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) }, 420 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) }, 421 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) }, 422 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) }, 423 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) }, 424 { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) }, 425 { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) }, 426 { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) }, 427 { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) }, 428 { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) }, 429 { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) }, 430 { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) }, 431 { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) }, 432 /* 433 * These will probably use user-space drivers. Uncomment them if 434 * you need them or use the user-specified vendor/product module 435 * parameters (see ftdi_sio.h for the numbers). Make a fuss if 436 * you think the driver should recognize any of them by default. 437 */ 438 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) }, */ 439 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) }, */ 440 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) }, */ 441 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) }, */ 442 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) }, */ 443 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) }, */ 444 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) }, */ 445 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) }, */ 446 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) }, */ 447 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) }, */ 448 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) }, */ 449 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) }, */ 450 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) }, */ 451 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) }, */ 452 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) }, */ 453 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) }, */ 454 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, */ 455 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) }, */ 456 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, */ 457 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) }, 458 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) }, 459 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) }, 460 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) }, 461 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) }, 462 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) }, 463 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) }, 464 { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) }, 465 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) }, 466 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) }, 467 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) }, 468 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) }, 469 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) }, 470 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) }, 471 { USB_DEVICE(TTI_VID, TTI_QL355P_PID) }, 472 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) }, 473 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) }, 474 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) }, 475 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) }, 476 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) }, 477 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) }, 478 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) }, 479 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) }, 480 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) }, 481 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) }, 482 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) }, 483 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) }, 484 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) }, 485 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) }, 486 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) }, 487 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) }, 488 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) }, 489 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) }, 490 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) }, 491 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) }, 492 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) }, 493 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) }, 494 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) }, 495 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) }, 496 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) }, 497 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) }, 498 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) }, 499 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) }, 500 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) }, 501 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) }, 502 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) }, 503 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) }, 504 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) }, 505 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) }, 506 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) }, 507 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) }, 508 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) }, 509 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) }, 510 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) }, 511 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) }, 512 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) }, 513 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) }, 514 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) }, 515 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) }, 516 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) }, 517 { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) }, 518 { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) }, 519 { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) }, 520 { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) }, 521 { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) }, 522 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) }, 523 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) }, 524 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) }, 525 { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) }, 526 { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) }, 527 { }, /* Optional parameter entry */ 528 { } /* Terminating entry */ 529 }; 530 531 MODULE_DEVICE_TABLE (usb, id_table_combined); 532 533 static struct usb_driver ftdi_driver = { 534 .name = "ftdi_sio", 535 .probe = usb_serial_probe, 536 .disconnect = usb_serial_disconnect, 537 .id_table = id_table_combined, 538 .no_dynamic_id = 1, 539 }; 540 541 static const char *ftdi_chip_name[] = { 542 [SIO] = "SIO", /* the serial part of FT8U100AX */ 543 [FT8U232AM] = "FT8U232AM", 544 [FT232BM] = "FT232BM", 545 [FT2232C] = "FT2232C", 546 [FT232RL] = "FT232RL", 547 }; 548 549 550 /* Constants for read urb and write urb */ 551 #define BUFSZ 512 552 #define PKTSZ 64 553 554 /* rx_flags */ 555 #define THROTTLED 0x01 556 #define ACTUALLY_THROTTLED 0x02 557 558 struct ftdi_private { 559 ftdi_chip_type_t chip_type; 560 /* type of the device, either SIO or FT8U232AM */ 561 int baud_base; /* baud base clock for divisor setting */ 562 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */ 563 __u16 last_set_data_urb_value ; 564 /* the last data state set - needed for doing a break */ 565 int write_offset; /* This is the offset in the usb data block to write the serial data - 566 * it is different between devices 567 */ 568 int flags; /* some ASYNC_xxxx flags are supported */ 569 unsigned long last_dtr_rts; /* saved modem control outputs */ 570 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ 571 char prev_status, diff_status; /* Used for TIOCMIWAIT */ 572 __u8 rx_flags; /* receive state flags (throttling) */ 573 spinlock_t rx_lock; /* spinlock for receive state */ 574 struct delayed_work rx_work; 575 struct usb_serial_port *port; 576 int rx_processed; 577 unsigned long rx_bytes; 578 579 __u16 interface; /* FT2232C port interface (0 for FT232/245) */ 580 581 int force_baud; /* if non-zero, force the baud rate to this value */ 582 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */ 583 584 spinlock_t tx_lock; /* spinlock for transmit state */ 585 unsigned long tx_bytes; 586 unsigned long tx_outstanding_bytes; 587 unsigned long tx_outstanding_urbs; 588 }; 589 590 /* Used for TIOCMIWAIT */ 591 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD) 592 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI) 593 /* End TIOCMIWAIT */ 594 595 #define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \ 596 ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP ) 597 598 /* function prototypes for a FTDI serial converter */ 599 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id); 600 static int ftdi_sio_attach (struct usb_serial *serial); 601 static void ftdi_shutdown (struct usb_serial *serial); 602 static int ftdi_sio_port_probe (struct usb_serial_port *port); 603 static int ftdi_sio_port_remove (struct usb_serial_port *port); 604 static int ftdi_open (struct usb_serial_port *port, struct file *filp); 605 static void ftdi_close (struct usb_serial_port *port, struct file *filp); 606 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count); 607 static int ftdi_write_room (struct usb_serial_port *port); 608 static int ftdi_chars_in_buffer (struct usb_serial_port *port); 609 static void ftdi_write_bulk_callback (struct urb *urb); 610 static void ftdi_read_bulk_callback (struct urb *urb); 611 static void ftdi_process_read (struct work_struct *work); 612 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * old); 613 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file); 614 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear); 615 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); 616 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state ); 617 static void ftdi_throttle (struct usb_serial_port *port); 618 static void ftdi_unthrottle (struct usb_serial_port *port); 619 620 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base); 621 static unsigned short int ftdi_232am_baud_to_divisor (int baud); 622 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base); 623 static __u32 ftdi_232bm_baud_to_divisor (int baud); 624 625 static struct usb_serial_driver ftdi_sio_device = { 626 .driver = { 627 .owner = THIS_MODULE, 628 .name = "ftdi_sio", 629 }, 630 .description = "FTDI USB Serial Device", 631 .usb_driver = &ftdi_driver , 632 .id_table = id_table_combined, 633 .num_interrupt_in = 0, 634 .num_bulk_in = 1, 635 .num_bulk_out = 1, 636 .num_ports = 1, 637 .probe = ftdi_sio_probe, 638 .port_probe = ftdi_sio_port_probe, 639 .port_remove = ftdi_sio_port_remove, 640 .open = ftdi_open, 641 .close = ftdi_close, 642 .throttle = ftdi_throttle, 643 .unthrottle = ftdi_unthrottle, 644 .write = ftdi_write, 645 .write_room = ftdi_write_room, 646 .chars_in_buffer = ftdi_chars_in_buffer, 647 .read_bulk_callback = ftdi_read_bulk_callback, 648 .write_bulk_callback = ftdi_write_bulk_callback, 649 .tiocmget = ftdi_tiocmget, 650 .tiocmset = ftdi_tiocmset, 651 .ioctl = ftdi_ioctl, 652 .set_termios = ftdi_set_termios, 653 .break_ctl = ftdi_break_ctl, 654 .attach = ftdi_sio_attach, 655 .shutdown = ftdi_shutdown, 656 }; 657 658 659 #define WDR_TIMEOUT 5000 /* default urb timeout */ 660 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */ 661 662 /* High and low are for DTR, RTS etc etc */ 663 #define HIGH 1 664 #define LOW 0 665 666 /* number of outstanding urbs to prevent userspace DoS from happening */ 667 #define URB_UPPER_LIMIT 42 668 669 /* 670 * *************************************************************************** 671 * Utlity functions 672 * *************************************************************************** 673 */ 674 675 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base) 676 { 677 unsigned short int divisor; 678 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 679 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1 680 divisor = divisor3 >> 3; 681 divisor3 &= 0x7; 682 if (divisor3 == 1) divisor |= 0xc000; else // 0.125 683 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5 684 if (divisor3 != 0) divisor |= 0x8000; // 0.25 685 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */ 686 return divisor; 687 } 688 689 static unsigned short int ftdi_232am_baud_to_divisor(int baud) 690 { 691 return(ftdi_232am_baud_base_to_divisor(baud, 48000000)); 692 } 693 694 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) 695 { 696 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; 697 __u32 divisor; 698 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 699 divisor = divisor3 >> 3; 700 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; 701 /* Deal with special cases for highest baud rates. */ 702 if (divisor == 1) divisor = 0; else // 1.0 703 if (divisor == 0x4001) divisor = 1; // 1.5 704 return divisor; 705 } 706 707 static __u32 ftdi_232bm_baud_to_divisor(int baud) 708 { 709 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000)); 710 } 711 712 #define set_mctrl(port, set) update_mctrl((port), (set), 0) 713 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear)) 714 715 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear) 716 { 717 struct ftdi_private *priv = usb_get_serial_port_data(port); 718 char *buf; 719 unsigned urb_value; 720 int rv; 721 722 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { 723 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__); 724 return 0; /* no change */ 725 } 726 727 buf = kmalloc(1, GFP_NOIO); 728 if (!buf) { 729 return -ENOMEM; 730 } 731 732 clear &= ~set; /* 'set' takes precedence over 'clear' */ 733 urb_value = 0; 734 if (clear & TIOCM_DTR) 735 urb_value |= FTDI_SIO_SET_DTR_LOW; 736 if (clear & TIOCM_RTS) 737 urb_value |= FTDI_SIO_SET_RTS_LOW; 738 if (set & TIOCM_DTR) 739 urb_value |= FTDI_SIO_SET_DTR_HIGH; 740 if (set & TIOCM_RTS) 741 urb_value |= FTDI_SIO_SET_RTS_HIGH; 742 rv = usb_control_msg(port->serial->dev, 743 usb_sndctrlpipe(port->serial->dev, 0), 744 FTDI_SIO_SET_MODEM_CTRL_REQUEST, 745 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, 746 urb_value, priv->interface, 747 buf, 0, WDR_TIMEOUT); 748 749 kfree(buf); 750 if (rv < 0) { 751 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s", 752 __FUNCTION__, 753 (set & TIOCM_DTR) ? "HIGH" : 754 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 755 (set & TIOCM_RTS) ? "HIGH" : 756 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 757 } else { 758 dbg("%s - DTR %s, RTS %s", __FUNCTION__, 759 (set & TIOCM_DTR) ? "HIGH" : 760 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 761 (set & TIOCM_RTS) ? "HIGH" : 762 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 763 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set; 764 } 765 return rv; 766 } 767 768 769 static __u32 get_ftdi_divisor(struct usb_serial_port * port); 770 771 772 static int change_speed(struct usb_serial_port *port) 773 { 774 struct ftdi_private *priv = usb_get_serial_port_data(port); 775 char *buf; 776 __u16 urb_value; 777 __u16 urb_index; 778 __u32 urb_index_value; 779 int rv; 780 781 buf = kmalloc(1, GFP_NOIO); 782 if (!buf) 783 return -ENOMEM; 784 785 urb_index_value = get_ftdi_divisor(port); 786 urb_value = (__u16)urb_index_value; 787 urb_index = (__u16)(urb_index_value >> 16); 788 if (priv->interface) { /* FT2232C */ 789 urb_index = (__u16)((urb_index << 8) | priv->interface); 790 } 791 792 rv = usb_control_msg(port->serial->dev, 793 usb_sndctrlpipe(port->serial->dev, 0), 794 FTDI_SIO_SET_BAUDRATE_REQUEST, 795 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, 796 urb_value, urb_index, 797 buf, 0, WDR_SHORT_TIMEOUT); 798 799 kfree(buf); 800 return rv; 801 } 802 803 804 static __u32 get_ftdi_divisor(struct usb_serial_port * port) 805 { /* get_ftdi_divisor */ 806 struct ftdi_private *priv = usb_get_serial_port_data(port); 807 __u32 div_value = 0; 808 int div_okay = 1; 809 int baud; 810 811 /* 812 * The logic involved in setting the baudrate can be cleanly split in 3 steps. 813 * Obtaining the actual baud rate is a little tricky since unix traditionally 814 * somehow ignored the possibility to set non-standard baud rates. 815 * 1. Standard baud rates are set in tty->termios->c_cflag 816 * 2. If these are not enough, you can set any speed using alt_speed as follows: 817 * - set tty->termios->c_cflag speed to B38400 818 * - set your real speed in tty->alt_speed; it gets ignored when 819 * alt_speed==0, (or) 820 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 821 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just 822 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800) 823 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate 824 * 3. You can also set baud rate by setting custom divisor as follows 825 * - set tty->termios->c_cflag speed to B38400 826 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 827 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST 828 * o custom_divisor set to baud_base / your_new_baudrate 829 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really 830 * spend some time and separate+move this common code to serial.c, it is 831 * replicated in nearly every serial driver you see. 832 */ 833 834 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */ 835 836 baud = tty_get_baud_rate(port->tty); 837 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud); 838 839 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */ 840 841 if (baud == 38400 && 842 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 843 (priv->custom_divisor)) { 844 baud = priv->baud_base / priv->custom_divisor; 845 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud); 846 } 847 848 /* 3. Convert baudrate to device-specific divisor */ 849 850 if (!baud) baud = 9600; 851 switch(priv->chip_type) { 852 case SIO: /* SIO chip */ 853 switch(baud) { 854 case 300: div_value = ftdi_sio_b300; break; 855 case 600: div_value = ftdi_sio_b600; break; 856 case 1200: div_value = ftdi_sio_b1200; break; 857 case 2400: div_value = ftdi_sio_b2400; break; 858 case 4800: div_value = ftdi_sio_b4800; break; 859 case 9600: div_value = ftdi_sio_b9600; break; 860 case 19200: div_value = ftdi_sio_b19200; break; 861 case 38400: div_value = ftdi_sio_b38400; break; 862 case 57600: div_value = ftdi_sio_b57600; break; 863 case 115200: div_value = ftdi_sio_b115200; break; 864 } /* baud */ 865 if (div_value == 0) { 866 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud); 867 div_value = ftdi_sio_b9600; 868 div_okay = 0; 869 } 870 break; 871 case FT8U232AM: /* 8U232AM chip */ 872 if (baud <= 3000000) { 873 div_value = ftdi_232am_baud_to_divisor(baud); 874 } else { 875 dbg("%s - Baud rate too high!", __FUNCTION__); 876 div_value = ftdi_232am_baud_to_divisor(9600); 877 div_okay = 0; 878 } 879 break; 880 case FT232BM: /* FT232BM chip */ 881 case FT2232C: /* FT2232C chip */ 882 case FT232RL: 883 if (baud <= 3000000) { 884 div_value = ftdi_232bm_baud_to_divisor(baud); 885 } else { 886 dbg("%s - Baud rate too high!", __FUNCTION__); 887 div_value = ftdi_232bm_baud_to_divisor(9600); 888 div_okay = 0; 889 } 890 break; 891 } /* priv->chip_type */ 892 893 if (div_okay) { 894 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s", 895 __FUNCTION__, baud, (unsigned long)div_value, 896 ftdi_chip_name[priv->chip_type]); 897 } 898 899 return(div_value); 900 } 901 902 903 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo) 904 { 905 struct ftdi_private *priv = usb_get_serial_port_data(port); 906 struct serial_struct tmp; 907 908 if (!retinfo) 909 return -EFAULT; 910 memset(&tmp, 0, sizeof(tmp)); 911 tmp.flags = priv->flags; 912 tmp.baud_base = priv->baud_base; 913 tmp.custom_divisor = priv->custom_divisor; 914 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 915 return -EFAULT; 916 return 0; 917 } /* get_serial_info */ 918 919 920 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo) 921 { /* set_serial_info */ 922 struct ftdi_private *priv = usb_get_serial_port_data(port); 923 struct serial_struct new_serial; 924 struct ftdi_private old_priv; 925 926 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 927 return -EFAULT; 928 old_priv = * priv; 929 930 /* Do error checking and permission checking */ 931 932 if (!capable(CAP_SYS_ADMIN)) { 933 if (((new_serial.flags & ~ASYNC_USR_MASK) != 934 (priv->flags & ~ASYNC_USR_MASK))) 935 return -EPERM; 936 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) | 937 (new_serial.flags & ASYNC_USR_MASK)); 938 priv->custom_divisor = new_serial.custom_divisor; 939 goto check_and_exit; 940 } 941 942 if ((new_serial.baud_base != priv->baud_base) && 943 (new_serial.baud_base < 9600)) 944 return -EINVAL; 945 946 /* Make the changes - these are privileged changes! */ 947 948 priv->flags = ((priv->flags & ~ASYNC_FLAGS) | 949 (new_serial.flags & ASYNC_FLAGS)); 950 priv->custom_divisor = new_serial.custom_divisor; 951 952 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 953 954 check_and_exit: 955 if ((old_priv.flags & ASYNC_SPD_MASK) != 956 (priv->flags & ASYNC_SPD_MASK)) { 957 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) 958 port->tty->alt_speed = 57600; 959 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) 960 port->tty->alt_speed = 115200; 961 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) 962 port->tty->alt_speed = 230400; 963 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) 964 port->tty->alt_speed = 460800; 965 else 966 port->tty->alt_speed = 0; 967 } 968 if (((old_priv.flags & ASYNC_SPD_MASK) != 969 (priv->flags & ASYNC_SPD_MASK)) || 970 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 971 (old_priv.custom_divisor != priv->custom_divisor))) { 972 change_speed(port); 973 } 974 975 return (0); 976 977 } /* set_serial_info */ 978 979 980 /* Determine type of FTDI chip based on USB config and descriptor. */ 981 static void ftdi_determine_type(struct usb_serial_port *port) 982 { 983 struct ftdi_private *priv = usb_get_serial_port_data(port); 984 struct usb_serial *serial = port->serial; 985 struct usb_device *udev = serial->dev; 986 unsigned version; 987 unsigned interfaces; 988 989 /* Assume it is not the original SIO device for now. */ 990 priv->baud_base = 48000000 / 2; 991 priv->write_offset = 0; 992 993 version = le16_to_cpu(udev->descriptor.bcdDevice); 994 interfaces = udev->actconfig->desc.bNumInterfaces; 995 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__, 996 version, interfaces); 997 if (interfaces > 1) { 998 int inter; 999 1000 /* Multiple interfaces. Assume FT2232C. */ 1001 priv->chip_type = FT2232C; 1002 /* Determine interface code. */ 1003 inter = serial->interface->altsetting->desc.bInterfaceNumber; 1004 if (inter == 0) { 1005 priv->interface = PIT_SIOA; 1006 } else { 1007 priv->interface = PIT_SIOB; 1008 } 1009 /* BM-type devices have a bug where bcdDevice gets set 1010 * to 0x200 when iSerialNumber is 0. */ 1011 if (version < 0x500) { 1012 dbg("%s: something fishy - bcdDevice too low for multi-interface device", 1013 __FUNCTION__); 1014 } 1015 } else if (version < 0x200) { 1016 /* Old device. Assume its the original SIO. */ 1017 priv->chip_type = SIO; 1018 priv->baud_base = 12000000 / 16; 1019 priv->write_offset = 1; 1020 } else if (version < 0x400) { 1021 /* Assume its an FT8U232AM (or FT8U245AM) */ 1022 /* (It might be a BM because of the iSerialNumber bug, 1023 * but it will still work as an AM device.) */ 1024 priv->chip_type = FT8U232AM; 1025 } else if (version < 0x600) { 1026 /* Assume its an FT232BM (or FT245BM) */ 1027 priv->chip_type = FT232BM; 1028 } else { 1029 /* Assume its an FT232R */ 1030 priv->chip_type = FT232RL; 1031 } 1032 info("Detected %s", ftdi_chip_name[priv->chip_type]); 1033 } 1034 1035 1036 /* 1037 * *************************************************************************** 1038 * Sysfs Attribute 1039 * *************************************************************************** 1040 */ 1041 1042 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf) 1043 { 1044 struct usb_serial_port *port = to_usb_serial_port(dev); 1045 struct ftdi_private *priv = usb_get_serial_port_data(port); 1046 struct usb_device *udev = port->serial->dev; 1047 unsigned short latency = 0; 1048 int rv = 0; 1049 1050 1051 dbg("%s",__FUNCTION__); 1052 1053 rv = usb_control_msg(udev, 1054 usb_rcvctrlpipe(udev, 0), 1055 FTDI_SIO_GET_LATENCY_TIMER_REQUEST, 1056 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE, 1057 0, priv->interface, 1058 (char*) &latency, 1, WDR_TIMEOUT); 1059 1060 if (rv < 0) { 1061 dev_err(dev, "Unable to read latency timer: %i", rv); 1062 return -EIO; 1063 } 1064 return sprintf(buf, "%i\n", latency); 1065 } 1066 1067 /* Write a new value of the latency timer, in units of milliseconds. */ 1068 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf, 1069 size_t count) 1070 { 1071 struct usb_serial_port *port = to_usb_serial_port(dev); 1072 struct ftdi_private *priv = usb_get_serial_port_data(port); 1073 struct usb_device *udev = port->serial->dev; 1074 char buf[1]; 1075 int v = simple_strtoul(valbuf, NULL, 10); 1076 int rv = 0; 1077 1078 dbg("%s: setting latency timer = %i", __FUNCTION__, v); 1079 1080 rv = usb_control_msg(udev, 1081 usb_sndctrlpipe(udev, 0), 1082 FTDI_SIO_SET_LATENCY_TIMER_REQUEST, 1083 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE, 1084 v, priv->interface, 1085 buf, 0, WDR_TIMEOUT); 1086 1087 if (rv < 0) { 1088 dev_err(dev, "Unable to write latency timer: %i", rv); 1089 return -EIO; 1090 } 1091 1092 return count; 1093 } 1094 1095 /* Write an event character directly to the FTDI register. The ASCII 1096 value is in the low 8 bits, with the enable bit in the 9th bit. */ 1097 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf, 1098 size_t count) 1099 { 1100 struct usb_serial_port *port = to_usb_serial_port(dev); 1101 struct ftdi_private *priv = usb_get_serial_port_data(port); 1102 struct usb_device *udev = port->serial->dev; 1103 char buf[1]; 1104 int v = simple_strtoul(valbuf, NULL, 10); 1105 int rv = 0; 1106 1107 dbg("%s: setting event char = %i", __FUNCTION__, v); 1108 1109 rv = usb_control_msg(udev, 1110 usb_sndctrlpipe(udev, 0), 1111 FTDI_SIO_SET_EVENT_CHAR_REQUEST, 1112 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE, 1113 v, priv->interface, 1114 buf, 0, WDR_TIMEOUT); 1115 1116 if (rv < 0) { 1117 dbg("Unable to write event character: %i", rv); 1118 return -EIO; 1119 } 1120 1121 return count; 1122 } 1123 1124 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer); 1125 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char); 1126 1127 static int create_sysfs_attrs(struct usb_serial_port *port) 1128 { 1129 struct ftdi_private *priv = usb_get_serial_port_data(port); 1130 int retval = 0; 1131 1132 dbg("%s",__FUNCTION__); 1133 1134 /* XXX I've no idea if the original SIO supports the event_char 1135 * sysfs parameter, so I'm playing it safe. */ 1136 if (priv->chip_type != SIO) { 1137 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]); 1138 retval = device_create_file(&port->dev, &dev_attr_event_char); 1139 if ((!retval) && 1140 (priv->chip_type == FT232BM || priv->chip_type == FT2232C)) { 1141 retval = device_create_file(&port->dev, 1142 &dev_attr_latency_timer); 1143 } 1144 } 1145 return retval; 1146 } 1147 1148 static void remove_sysfs_attrs(struct usb_serial_port *port) 1149 { 1150 struct ftdi_private *priv = usb_get_serial_port_data(port); 1151 1152 dbg("%s",__FUNCTION__); 1153 1154 /* XXX see create_sysfs_attrs */ 1155 if (priv->chip_type != SIO) { 1156 device_remove_file(&port->dev, &dev_attr_event_char); 1157 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) { 1158 device_remove_file(&port->dev, &dev_attr_latency_timer); 1159 } 1160 } 1161 1162 } 1163 1164 /* 1165 * *************************************************************************** 1166 * FTDI driver specific functions 1167 * *************************************************************************** 1168 */ 1169 1170 /* Probe function to check for special devices */ 1171 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id) 1172 { 1173 usb_set_serial_data(serial, (void *)id->driver_info); 1174 1175 return (0); 1176 } 1177 1178 static int ftdi_sio_port_probe(struct usb_serial_port *port) 1179 { 1180 struct ftdi_private *priv; 1181 1182 dbg("%s",__FUNCTION__); 1183 1184 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL); 1185 if (!priv){ 1186 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private)); 1187 return -ENOMEM; 1188 } 1189 1190 spin_lock_init(&priv->rx_lock); 1191 spin_lock_init(&priv->tx_lock); 1192 init_waitqueue_head(&priv->delta_msr_wait); 1193 /* This will push the characters through immediately rather 1194 than queue a task to deliver them */ 1195 priv->flags = ASYNC_LOW_LATENCY; 1196 1197 /* Increase the size of read buffers */ 1198 kfree(port->bulk_in_buffer); 1199 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL); 1200 if (!port->bulk_in_buffer) { 1201 kfree (priv); 1202 return -ENOMEM; 1203 } 1204 if (port->read_urb) { 1205 port->read_urb->transfer_buffer = port->bulk_in_buffer; 1206 port->read_urb->transfer_buffer_length = BUFSZ; 1207 } 1208 1209 INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read); 1210 priv->port = port; 1211 1212 /* Free port's existing write urb and transfer buffer. */ 1213 if (port->write_urb) { 1214 usb_free_urb (port->write_urb); 1215 port->write_urb = NULL; 1216 } 1217 kfree(port->bulk_out_buffer); 1218 port->bulk_out_buffer = NULL; 1219 1220 usb_set_serial_port_data(port, priv); 1221 1222 ftdi_determine_type (port); 1223 create_sysfs_attrs(port); 1224 return 0; 1225 } 1226 1227 /* attach subroutine */ 1228 static int ftdi_sio_attach (struct usb_serial *serial) 1229 { 1230 /* Check for device requiring special set up. */ 1231 struct ftdi_sio_quirk *quirk = usb_get_serial_data(serial); 1232 1233 if (quirk && quirk->setup) 1234 quirk->setup(serial); 1235 1236 return 0; 1237 } /* ftdi_sio_attach */ 1238 1239 1240 /* Setup for the USB-UIRT device, which requires hardwired 1241 * baudrate (38400 gets mapped to 312500) */ 1242 /* Called from usbserial:serial_probe */ 1243 static void ftdi_USB_UIRT_setup (struct usb_serial *serial) 1244 { 1245 struct ftdi_private *priv; 1246 1247 dbg("%s",__FUNCTION__); 1248 1249 priv = usb_get_serial_port_data(serial->port[0]); 1250 priv->flags |= ASYNC_SPD_CUST; 1251 priv->custom_divisor = 77; 1252 priv->force_baud = B38400; 1253 } /* ftdi_USB_UIRT_setup */ 1254 1255 /* Setup for the HE-TIRA1 device, which requires hardwired 1256 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */ 1257 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial) 1258 { 1259 struct ftdi_private *priv; 1260 1261 dbg("%s",__FUNCTION__); 1262 1263 priv = usb_get_serial_port_data(serial->port[0]); 1264 priv->flags |= ASYNC_SPD_CUST; 1265 priv->custom_divisor = 240; 1266 priv->force_baud = B38400; 1267 priv->force_rtscts = 1; 1268 } /* ftdi_HE_TIRA1_setup */ 1269 1270 1271 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect 1272 * it is called when the usb device is disconnected 1273 * 1274 * usbserial:usb_serial_disconnect 1275 * calls __serial_close for each open of the port 1276 * shutdown is called then (ie ftdi_shutdown) 1277 */ 1278 static void ftdi_shutdown (struct usb_serial *serial) 1279 { 1280 dbg("%s", __FUNCTION__); 1281 } 1282 1283 static int ftdi_sio_port_remove(struct usb_serial_port *port) 1284 { 1285 struct ftdi_private *priv = usb_get_serial_port_data(port); 1286 1287 dbg("%s", __FUNCTION__); 1288 1289 remove_sysfs_attrs(port); 1290 1291 /* all open ports are closed at this point 1292 * (by usbserial.c:__serial_close, which calls ftdi_close) 1293 */ 1294 1295 if (priv) { 1296 usb_set_serial_port_data(port, NULL); 1297 kfree(priv); 1298 } 1299 1300 return 0; 1301 } 1302 1303 static int ftdi_open (struct usb_serial_port *port, struct file *filp) 1304 { /* ftdi_open */ 1305 struct usb_device *dev = port->serial->dev; 1306 struct ftdi_private *priv = usb_get_serial_port_data(port); 1307 unsigned long flags; 1308 1309 int result = 0; 1310 char buf[1]; /* Needed for the usb_control_msg I think */ 1311 1312 dbg("%s", __FUNCTION__); 1313 1314 spin_lock_irqsave(&priv->tx_lock, flags); 1315 priv->tx_bytes = 0; 1316 spin_unlock_irqrestore(&priv->tx_lock, flags); 1317 spin_lock_irqsave(&priv->rx_lock, flags); 1318 priv->rx_bytes = 0; 1319 spin_unlock_irqrestore(&priv->rx_lock, flags); 1320 1321 if (port->tty) 1322 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1323 1324 /* No error checking for this (will get errors later anyway) */ 1325 /* See ftdi_sio.h for description of what is reset */ 1326 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1327 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE, 1328 FTDI_SIO_RESET_SIO, 1329 priv->interface, buf, 0, WDR_TIMEOUT); 1330 1331 /* Termios defaults are set by usb_serial_init. We don't change 1332 port->tty->termios - this would loose speed settings, etc. 1333 This is same behaviour as serial.c/rs_open() - Kuba */ 1334 1335 /* ftdi_set_termios will send usb control messages */ 1336 if (port->tty) 1337 ftdi_set_termios(port, NULL); 1338 1339 /* FIXME: Flow control might be enabled, so it should be checked - 1340 we have no control of defaults! */ 1341 /* Turn on RTS and DTR since we are not flow controlling by default */ 1342 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1343 1344 /* Not throttled */ 1345 spin_lock_irqsave(&priv->rx_lock, flags); 1346 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 1347 spin_unlock_irqrestore(&priv->rx_lock, flags); 1348 1349 /* Start reading from the device */ 1350 priv->rx_processed = 0; 1351 usb_fill_bulk_urb(port->read_urb, dev, 1352 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress), 1353 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1354 ftdi_read_bulk_callback, port); 1355 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 1356 if (result) 1357 err("%s - failed submitting read urb, error %d", __FUNCTION__, result); 1358 1359 1360 return result; 1361 } /* ftdi_open */ 1362 1363 1364 1365 /* 1366 * usbserial:__serial_close only calls ftdi_close if the point is open 1367 * 1368 * This only gets called when it is the last close 1369 * 1370 * 1371 */ 1372 1373 static void ftdi_close (struct usb_serial_port *port, struct file *filp) 1374 { /* ftdi_close */ 1375 unsigned int c_cflag = port->tty->termios->c_cflag; 1376 struct ftdi_private *priv = usb_get_serial_port_data(port); 1377 char buf[1]; 1378 1379 dbg("%s", __FUNCTION__); 1380 1381 if (c_cflag & HUPCL){ 1382 /* Disable flow control */ 1383 if (usb_control_msg(port->serial->dev, 1384 usb_sndctrlpipe(port->serial->dev, 0), 1385 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1386 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1387 0, priv->interface, buf, 0, 1388 WDR_TIMEOUT) < 0) { 1389 err("error from flowcontrol urb"); 1390 } 1391 1392 /* drop RTS and DTR */ 1393 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1394 } /* Note change no line if hupcl is off */ 1395 1396 /* cancel any scheduled reading */ 1397 cancel_delayed_work(&priv->rx_work); 1398 flush_scheduled_work(); 1399 1400 /* shutdown our bulk read */ 1401 usb_kill_urb(port->read_urb); 1402 } /* ftdi_close */ 1403 1404 1405 1406 /* The SIO requires the first byte to have: 1407 * B0 1 1408 * B1 0 1409 * B2..7 length of message excluding byte 0 1410 * 1411 * The new devices do not require this byte 1412 */ 1413 static int ftdi_write (struct usb_serial_port *port, 1414 const unsigned char *buf, int count) 1415 { /* ftdi_write */ 1416 struct ftdi_private *priv = usb_get_serial_port_data(port); 1417 struct urb *urb; 1418 unsigned char *buffer; 1419 int data_offset ; /* will be 1 for the SIO and 0 otherwise */ 1420 int status; 1421 int transfer_size; 1422 unsigned long flags; 1423 1424 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count); 1425 1426 if (count == 0) { 1427 dbg("write request of 0 bytes"); 1428 return 0; 1429 } 1430 spin_lock_irqsave(&priv->tx_lock, flags); 1431 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) { 1432 spin_unlock_irqrestore(&priv->tx_lock, flags); 1433 dbg("%s - write limit hit\n", __FUNCTION__); 1434 return 0; 1435 } 1436 spin_unlock_irqrestore(&priv->tx_lock, flags); 1437 1438 data_offset = priv->write_offset; 1439 dbg("data_offset set to %d",data_offset); 1440 1441 /* Determine total transfer size */ 1442 transfer_size = count; 1443 if (data_offset > 0) { 1444 /* Original sio needs control bytes too... */ 1445 transfer_size += (data_offset * 1446 ((count + (PKTSZ - 1 - data_offset)) / 1447 (PKTSZ - data_offset))); 1448 } 1449 1450 buffer = kmalloc (transfer_size, GFP_ATOMIC); 1451 if (!buffer) { 1452 err("%s ran out of kernel memory for urb ...", __FUNCTION__); 1453 return -ENOMEM; 1454 } 1455 1456 urb = usb_alloc_urb(0, GFP_ATOMIC); 1457 if (!urb) { 1458 err("%s - no more free urbs", __FUNCTION__); 1459 kfree (buffer); 1460 return -ENOMEM; 1461 } 1462 1463 /* Copy data */ 1464 if (data_offset > 0) { 1465 /* Original sio requires control byte at start of each packet. */ 1466 int user_pktsz = PKTSZ - data_offset; 1467 int todo = count; 1468 unsigned char *first_byte = buffer; 1469 const unsigned char *current_position = buf; 1470 1471 while (todo > 0) { 1472 if (user_pktsz > todo) { 1473 user_pktsz = todo; 1474 } 1475 /* Write the control byte at the front of the packet*/ 1476 *first_byte = 1 | ((user_pktsz) << 2); 1477 /* Copy data for packet */ 1478 memcpy (first_byte + data_offset, 1479 current_position, user_pktsz); 1480 first_byte += user_pktsz + data_offset; 1481 current_position += user_pktsz; 1482 todo -= user_pktsz; 1483 } 1484 } else { 1485 /* No control byte required. */ 1486 /* Copy in the data to send */ 1487 memcpy (buffer, buf, count); 1488 } 1489 1490 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer); 1491 1492 /* fill the buffer and send it */ 1493 usb_fill_bulk_urb(urb, port->serial->dev, 1494 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), 1495 buffer, transfer_size, 1496 ftdi_write_bulk_callback, port); 1497 1498 status = usb_submit_urb(urb, GFP_ATOMIC); 1499 if (status) { 1500 err("%s - failed submitting write urb, error %d", __FUNCTION__, status); 1501 count = status; 1502 kfree (buffer); 1503 } else { 1504 spin_lock_irqsave(&priv->tx_lock, flags); 1505 ++priv->tx_outstanding_urbs; 1506 priv->tx_outstanding_bytes += count; 1507 priv->tx_bytes += count; 1508 spin_unlock_irqrestore(&priv->tx_lock, flags); 1509 } 1510 1511 /* we are done with this urb, so let the host driver 1512 * really free it when it is finished with it */ 1513 usb_free_urb (urb); 1514 1515 dbg("%s write returning: %d", __FUNCTION__, count); 1516 return count; 1517 } /* ftdi_write */ 1518 1519 1520 /* This function may get called when the device is closed */ 1521 1522 static void ftdi_write_bulk_callback (struct urb *urb) 1523 { 1524 unsigned long flags; 1525 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1526 struct ftdi_private *priv; 1527 int data_offset; /* will be 1 for the SIO and 0 otherwise */ 1528 unsigned long countback; 1529 1530 /* free up the transfer buffer, as usb_free_urb() does not do this */ 1531 kfree (urb->transfer_buffer); 1532 1533 dbg("%s - port %d", __FUNCTION__, port->number); 1534 1535 if (urb->status) { 1536 dbg("nonzero write bulk status received: %d", urb->status); 1537 return; 1538 } 1539 1540 priv = usb_get_serial_port_data(port); 1541 if (!priv) { 1542 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1543 return; 1544 } 1545 /* account for transferred data */ 1546 countback = urb->actual_length; 1547 data_offset = priv->write_offset; 1548 if (data_offset > 0) { 1549 /* Subtract the control bytes */ 1550 countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ)); 1551 } 1552 spin_lock_irqsave(&priv->tx_lock, flags); 1553 --priv->tx_outstanding_urbs; 1554 priv->tx_outstanding_bytes -= countback; 1555 spin_unlock_irqrestore(&priv->tx_lock, flags); 1556 1557 usb_serial_port_softint(port); 1558 } /* ftdi_write_bulk_callback */ 1559 1560 1561 static int ftdi_write_room( struct usb_serial_port *port ) 1562 { 1563 struct ftdi_private *priv = usb_get_serial_port_data(port); 1564 int room; 1565 unsigned long flags; 1566 1567 dbg("%s - port %d", __FUNCTION__, port->number); 1568 1569 spin_lock_irqsave(&priv->tx_lock, flags); 1570 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) { 1571 /* 1572 * We really can take anything the user throws at us 1573 * but let's pick a nice big number to tell the tty 1574 * layer that we have lots of free space 1575 */ 1576 room = 2048; 1577 } else { 1578 room = 0; 1579 } 1580 spin_unlock_irqrestore(&priv->tx_lock, flags); 1581 return room; 1582 } /* ftdi_write_room */ 1583 1584 1585 static int ftdi_chars_in_buffer (struct usb_serial_port *port) 1586 { /* ftdi_chars_in_buffer */ 1587 struct ftdi_private *priv = usb_get_serial_port_data(port); 1588 int buffered; 1589 unsigned long flags; 1590 1591 dbg("%s - port %d", __FUNCTION__, port->number); 1592 1593 spin_lock_irqsave(&priv->tx_lock, flags); 1594 buffered = (int)priv->tx_outstanding_bytes; 1595 spin_unlock_irqrestore(&priv->tx_lock, flags); 1596 if (buffered < 0) { 1597 err("%s outstanding tx bytes is negative!", __FUNCTION__); 1598 buffered = 0; 1599 } 1600 return buffered; 1601 } /* ftdi_chars_in_buffer */ 1602 1603 1604 1605 static void ftdi_read_bulk_callback (struct urb *urb) 1606 { /* ftdi_read_bulk_callback */ 1607 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1608 struct tty_struct *tty; 1609 struct ftdi_private *priv; 1610 unsigned long countread; 1611 unsigned long flags; 1612 1613 if (urb->number_of_packets > 0) { 1614 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__, 1615 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets ); 1616 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags ); 1617 } 1618 1619 dbg("%s - port %d", __FUNCTION__, port->number); 1620 1621 if (port->open_count <= 0) 1622 return; 1623 1624 tty = port->tty; 1625 if (!tty) { 1626 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1627 return; 1628 } 1629 1630 priv = usb_get_serial_port_data(port); 1631 if (!priv) { 1632 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1633 return; 1634 } 1635 1636 if (urb != port->read_urb) { 1637 err("%s - Not my urb!", __FUNCTION__); 1638 } 1639 1640 if (urb->status) { 1641 /* This will happen at close every time so it is a dbg not an err */ 1642 dbg("(this is ok on close) nonzero read bulk status received: %d", urb->status); 1643 return; 1644 } 1645 1646 /* count data bytes, but not status bytes */ 1647 countread = urb->actual_length; 1648 countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ); 1649 spin_lock_irqsave(&priv->rx_lock, flags); 1650 priv->rx_bytes += countread; 1651 spin_unlock_irqrestore(&priv->rx_lock, flags); 1652 1653 ftdi_process_read(&priv->rx_work.work); 1654 1655 } /* ftdi_read_bulk_callback */ 1656 1657 1658 static void ftdi_process_read (struct work_struct *work) 1659 { /* ftdi_process_read */ 1660 struct ftdi_private *priv = 1661 container_of(work, struct ftdi_private, rx_work.work); 1662 struct usb_serial_port *port = priv->port; 1663 struct urb *urb; 1664 struct tty_struct *tty; 1665 char error_flag; 1666 unsigned char *data; 1667 1668 int i; 1669 int result; 1670 int need_flip; 1671 int packet_offset; 1672 unsigned long flags; 1673 1674 dbg("%s - port %d", __FUNCTION__, port->number); 1675 1676 if (port->open_count <= 0) 1677 return; 1678 1679 tty = port->tty; 1680 if (!tty) { 1681 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1682 return; 1683 } 1684 1685 priv = usb_get_serial_port_data(port); 1686 if (!priv) { 1687 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1688 return; 1689 } 1690 1691 urb = port->read_urb; 1692 if (!urb) { 1693 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__); 1694 return; 1695 } 1696 1697 data = urb->transfer_buffer; 1698 1699 if (priv->rx_processed) { 1700 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__, 1701 priv->rx_processed, 1702 urb->actual_length - priv->rx_processed); 1703 } else { 1704 /* The first two bytes of every read packet are status */ 1705 if (urb->actual_length > 2) { 1706 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1707 } else { 1708 dbg("Status only: %03oo %03oo",data[0],data[1]); 1709 } 1710 } 1711 1712 1713 /* TO DO -- check for hung up line and handle appropriately: */ 1714 /* send hangup */ 1715 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */ 1716 /* if CD is dropped and the line is not CLOCAL then we should hangup */ 1717 1718 need_flip = 0; 1719 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) { 1720 int length; 1721 1722 /* Compare new line status to the old one, signal if different */ 1723 /* N.B. packet may be processed more than once, but differences 1724 * are only processed once. */ 1725 if (priv != NULL) { 1726 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK; 1727 if (new_status != priv->prev_status) { 1728 priv->diff_status |= new_status ^ priv->prev_status; 1729 wake_up_interruptible(&priv->delta_msr_wait); 1730 priv->prev_status = new_status; 1731 } 1732 } 1733 1734 length = min(PKTSZ, urb->actual_length-packet_offset)-2; 1735 if (length < 0) { 1736 err("%s - bad packet length: %d", __FUNCTION__, length+2); 1737 length = 0; 1738 } 1739 1740 if (priv->rx_flags & THROTTLED) { 1741 dbg("%s - throttled", __FUNCTION__); 1742 break; 1743 } 1744 if (tty_buffer_request_room(tty, length) < length) { 1745 /* break out & wait for throttling/unthrottling to happen */ 1746 dbg("%s - receive room low", __FUNCTION__); 1747 break; 1748 } 1749 1750 /* Handle errors and break */ 1751 error_flag = TTY_NORMAL; 1752 /* Although the device uses a bitmask and hence can have multiple */ 1753 /* errors on a packet - the order here sets the priority the */ 1754 /* error is returned to the tty layer */ 1755 1756 if ( data[packet_offset+1] & FTDI_RS_OE ) { 1757 error_flag = TTY_OVERRUN; 1758 dbg("OVERRRUN error"); 1759 } 1760 if ( data[packet_offset+1] & FTDI_RS_BI ) { 1761 error_flag = TTY_BREAK; 1762 dbg("BREAK received"); 1763 } 1764 if ( data[packet_offset+1] & FTDI_RS_PE ) { 1765 error_flag = TTY_PARITY; 1766 dbg("PARITY error"); 1767 } 1768 if ( data[packet_offset+1] & FTDI_RS_FE ) { 1769 error_flag = TTY_FRAME; 1770 dbg("FRAMING error"); 1771 } 1772 if (length > 0) { 1773 for (i = 2; i < length+2; i++) { 1774 /* Note that the error flag is duplicated for 1775 every character received since we don't know 1776 which character it applied to */ 1777 tty_insert_flip_char(tty, data[packet_offset+i], error_flag); 1778 } 1779 need_flip = 1; 1780 } 1781 1782 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW 1783 /* if a parity error is detected you get status packets forever 1784 until a character is sent without a parity error. 1785 This doesn't work well since the application receives a never 1786 ending stream of bad data - even though new data hasn't been sent. 1787 Therefore I (bill) have taken this out. 1788 However - this might make sense for framing errors and so on 1789 so I am leaving the code in for now. 1790 */ 1791 else { 1792 if (error_flag != TTY_NORMAL){ 1793 dbg("error_flag is not normal"); 1794 /* In this case it is just status - if that is an error send a bad character */ 1795 if(tty->flip.count >= TTY_FLIPBUF_SIZE) { 1796 tty_flip_buffer_push(tty); 1797 } 1798 tty_insert_flip_char(tty, 0xff, error_flag); 1799 need_flip = 1; 1800 } 1801 } 1802 #endif 1803 } /* "for(packet_offset=0..." */ 1804 1805 /* Low latency */ 1806 if (need_flip) { 1807 tty_flip_buffer_push(tty); 1808 } 1809 1810 if (packet_offset < urb->actual_length) { 1811 /* not completely processed - record progress */ 1812 priv->rx_processed = packet_offset; 1813 dbg("%s - incomplete, %d bytes processed, %d remain", 1814 __FUNCTION__, packet_offset, 1815 urb->actual_length - packet_offset); 1816 /* check if we were throttled while processing */ 1817 spin_lock_irqsave(&priv->rx_lock, flags); 1818 if (priv->rx_flags & THROTTLED) { 1819 priv->rx_flags |= ACTUALLY_THROTTLED; 1820 spin_unlock_irqrestore(&priv->rx_lock, flags); 1821 dbg("%s - deferring remainder until unthrottled", 1822 __FUNCTION__); 1823 return; 1824 } 1825 spin_unlock_irqrestore(&priv->rx_lock, flags); 1826 /* if the port is closed stop trying to read */ 1827 if (port->open_count > 0){ 1828 /* delay processing of remainder */ 1829 schedule_delayed_work(&priv->rx_work, 1); 1830 } else { 1831 dbg("%s - port is closed", __FUNCTION__); 1832 } 1833 return; 1834 } 1835 1836 /* urb is completely processed */ 1837 priv->rx_processed = 0; 1838 1839 /* if the port is closed stop trying to read */ 1840 if (port->open_count > 0){ 1841 /* Continue trying to always read */ 1842 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 1843 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), 1844 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1845 ftdi_read_bulk_callback, port); 1846 1847 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 1848 if (result) 1849 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1850 } 1851 1852 return; 1853 } /* ftdi_process_read */ 1854 1855 1856 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state ) 1857 { 1858 struct ftdi_private *priv = usb_get_serial_port_data(port); 1859 __u16 urb_value = 0; 1860 char buf[1]; 1861 1862 /* break_state = -1 to turn on break, and 0 to turn off break */ 1863 /* see drivers/char/tty_io.c to see it used */ 1864 /* last_set_data_urb_value NEVER has the break bit set in it */ 1865 1866 if (break_state) { 1867 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK; 1868 } else { 1869 urb_value = priv->last_set_data_urb_value; 1870 } 1871 1872 1873 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), 1874 FTDI_SIO_SET_DATA_REQUEST, 1875 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1876 urb_value , priv->interface, 1877 buf, 0, WDR_TIMEOUT) < 0) { 1878 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state); 1879 } 1880 1881 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value); 1882 1883 } 1884 1885 1886 /* old_termios contains the original termios settings and tty->termios contains 1887 * the new setting to be used 1888 * WARNING: set_termios calls this with old_termios in kernel space 1889 */ 1890 1891 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) 1892 { /* ftdi_termios */ 1893 struct usb_device *dev = port->serial->dev; 1894 unsigned int cflag = port->tty->termios->c_cflag; 1895 struct ftdi_private *priv = usb_get_serial_port_data(port); 1896 __u16 urb_value; /* will hold the new flags */ 1897 char buf[1]; /* Perhaps I should dynamically alloc this? */ 1898 1899 // Added for xon/xoff support 1900 unsigned int iflag = port->tty->termios->c_iflag; 1901 unsigned char vstop; 1902 unsigned char vstart; 1903 1904 dbg("%s", __FUNCTION__); 1905 1906 /* Force baud rate if this device requires it, unless it is set to B0. */ 1907 if (priv->force_baud && ((port->tty->termios->c_cflag & CBAUD) != B0)) { 1908 dbg("%s: forcing baud rate for this device", __FUNCTION__); 1909 port->tty->termios->c_cflag &= ~CBAUD; 1910 port->tty->termios->c_cflag |= priv->force_baud; 1911 } 1912 1913 /* Force RTS-CTS if this device requires it. */ 1914 if (priv->force_rtscts) { 1915 dbg("%s: forcing rtscts for this device", __FUNCTION__); 1916 port->tty->termios->c_cflag |= CRTSCTS; 1917 } 1918 1919 cflag = port->tty->termios->c_cflag; 1920 1921 /* FIXME -For this cut I don't care if the line is really changing or 1922 not - so just do the change regardless - should be able to 1923 compare old_termios and tty->termios */ 1924 /* NOTE These routines can get interrupted by 1925 ftdi_sio_read_bulk_callback - need to examine what this 1926 means - don't see any problems yet */ 1927 1928 /* Set number of data bits, parity, stop bits */ 1929 1930 urb_value = 0; 1931 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : 1932 FTDI_SIO_SET_DATA_STOP_BITS_1); 1933 urb_value |= (cflag & PARENB ? 1934 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD : 1935 FTDI_SIO_SET_DATA_PARITY_EVEN) : 1936 FTDI_SIO_SET_DATA_PARITY_NONE); 1937 if (cflag & CSIZE) { 1938 switch (cflag & CSIZE) { 1939 case CS5: urb_value |= 5; dbg("Setting CS5"); break; 1940 case CS6: urb_value |= 6; dbg("Setting CS6"); break; 1941 case CS7: urb_value |= 7; dbg("Setting CS7"); break; 1942 case CS8: urb_value |= 8; dbg("Setting CS8"); break; 1943 default: 1944 err("CSIZE was set but not CS5-CS8"); 1945 } 1946 } 1947 1948 /* This is needed by the break command since it uses the same command - but is 1949 * or'ed with this value */ 1950 priv->last_set_data_urb_value = urb_value; 1951 1952 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1953 FTDI_SIO_SET_DATA_REQUEST, 1954 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1955 urb_value , priv->interface, 1956 buf, 0, WDR_SHORT_TIMEOUT) < 0) { 1957 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__); 1958 } 1959 1960 /* Now do the baudrate */ 1961 if ((cflag & CBAUD) == B0 ) { 1962 /* Disable flow control */ 1963 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1964 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1965 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1966 0, priv->interface, 1967 buf, 0, WDR_TIMEOUT) < 0) { 1968 err("%s error from disable flowcontrol urb", __FUNCTION__); 1969 } 1970 /* Drop RTS and DTR */ 1971 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1972 } else { 1973 /* set the baudrate determined before */ 1974 if (change_speed(port)) { 1975 err("%s urb failed to set baudrate", __FUNCTION__); 1976 } 1977 /* Ensure RTS and DTR are raised when baudrate changed from 0 */ 1978 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) { 1979 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1980 } 1981 } 1982 1983 /* Set flow control */ 1984 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ 1985 if (cflag & CRTSCTS) { 1986 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__); 1987 if (usb_control_msg(dev, 1988 usb_sndctrlpipe(dev, 0), 1989 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1990 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1991 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface), 1992 buf, 0, WDR_TIMEOUT) < 0) { 1993 err("urb failed to set to rts/cts flow control"); 1994 } 1995 1996 } else { 1997 /* 1998 * Xon/Xoff code 1999 * 2000 * Check the IXOFF status in the iflag component of the termios structure 2001 * if IXOFF is not set, the pre-xon/xoff code is executed. 2002 */ 2003 if (iflag & IXOFF) { 2004 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag); 2005 // Try to enable the XON/XOFF on the ftdi_sio 2006 // Set the vstart and vstop -- could have been done up above where 2007 // a lot of other dereferencing is done but that would be very 2008 // inefficient as vstart and vstop are not always needed 2009 vstart=port->tty->termios->c_cc[VSTART]; 2010 vstop=port->tty->termios->c_cc[VSTOP]; 2011 urb_value=(vstop << 8) | (vstart); 2012 2013 if (usb_control_msg(dev, 2014 usb_sndctrlpipe(dev, 0), 2015 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 2016 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 2017 urb_value , (FTDI_SIO_XON_XOFF_HS 2018 | priv->interface), 2019 buf, 0, WDR_TIMEOUT) < 0) { 2020 err("urb failed to set to xon/xoff flow control"); 2021 } 2022 } else { 2023 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */ 2024 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */ 2025 dbg("%s Turning off hardware flow control", __FUNCTION__); 2026 if (usb_control_msg(dev, 2027 usb_sndctrlpipe(dev, 0), 2028 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 2029 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 2030 0, priv->interface, 2031 buf, 0, WDR_TIMEOUT) < 0) { 2032 err("urb failed to clear flow control"); 2033 } 2034 } 2035 2036 } 2037 return; 2038 } /* ftdi_termios */ 2039 2040 2041 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file) 2042 { 2043 struct ftdi_private *priv = usb_get_serial_port_data(port); 2044 unsigned char buf[2]; 2045 int ret; 2046 2047 dbg("%s TIOCMGET", __FUNCTION__); 2048 switch (priv->chip_type) { 2049 case SIO: 2050 /* Request the status from the device */ 2051 if ((ret = usb_control_msg(port->serial->dev, 2052 usb_rcvctrlpipe(port->serial->dev, 0), 2053 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 2054 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 2055 0, 0, 2056 buf, 1, WDR_TIMEOUT)) < 0 ) { 2057 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 2058 ret); 2059 return(ret); 2060 } 2061 break; 2062 case FT8U232AM: 2063 case FT232BM: 2064 case FT2232C: 2065 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same 2066 format as the data returned from the in point */ 2067 if ((ret = usb_control_msg(port->serial->dev, 2068 usb_rcvctrlpipe(port->serial->dev, 0), 2069 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 2070 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 2071 0, priv->interface, 2072 buf, 2, WDR_TIMEOUT)) < 0 ) { 2073 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 2074 ret); 2075 return(ret); 2076 } 2077 break; 2078 default: 2079 return -EFAULT; 2080 break; 2081 } 2082 2083 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) | 2084 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) | 2085 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) | 2086 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) | 2087 priv->last_dtr_rts; 2088 } 2089 2090 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear) 2091 { 2092 dbg("%s TIOCMSET", __FUNCTION__); 2093 return update_mctrl(port, set, clear); 2094 } 2095 2096 2097 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 2098 { 2099 struct ftdi_private *priv = usb_get_serial_port_data(port); 2100 2101 dbg("%s cmd 0x%04x", __FUNCTION__, cmd); 2102 2103 /* Based on code from acm.c and others */ 2104 switch (cmd) { 2105 2106 case TIOCGSERIAL: /* gets serial port data */ 2107 return get_serial_info(port, (struct serial_struct __user *) arg); 2108 2109 case TIOCSSERIAL: /* sets serial port data */ 2110 return set_serial_info(port, (struct serial_struct __user *) arg); 2111 2112 /* 2113 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 2114 * - mask passed in arg for lines of interest 2115 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 2116 * Caller should use TIOCGICOUNT to see which one it was. 2117 * 2118 * This code is borrowed from linux/drivers/char/serial.c 2119 */ 2120 case TIOCMIWAIT: 2121 while (priv != NULL) { 2122 interruptible_sleep_on(&priv->delta_msr_wait); 2123 /* see if a signal did it */ 2124 if (signal_pending(current)) 2125 return -ERESTARTSYS; 2126 else { 2127 char diff = priv->diff_status; 2128 2129 if (diff == 0) { 2130 return -EIO; /* no change => error */ 2131 } 2132 2133 /* Consume all events */ 2134 priv->diff_status = 0; 2135 2136 /* Return 0 if caller wanted to know about these bits */ 2137 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) || 2138 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) || 2139 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) || 2140 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) { 2141 return 0; 2142 } 2143 /* 2144 * Otherwise caller can't care less about what happened, 2145 * and so we continue to wait for more events. 2146 */ 2147 } 2148 } 2149 return(0); 2150 break; 2151 default: 2152 break; 2153 2154 } 2155 2156 2157 /* This is not necessarily an error - turns out the higher layers will do 2158 * some ioctls itself (see comment above) 2159 */ 2160 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd); 2161 2162 return(-ENOIOCTLCMD); 2163 } /* ftdi_ioctl */ 2164 2165 2166 static void ftdi_throttle (struct usb_serial_port *port) 2167 { 2168 struct ftdi_private *priv = usb_get_serial_port_data(port); 2169 unsigned long flags; 2170 2171 dbg("%s - port %d", __FUNCTION__, port->number); 2172 2173 spin_lock_irqsave(&priv->rx_lock, flags); 2174 priv->rx_flags |= THROTTLED; 2175 spin_unlock_irqrestore(&priv->rx_lock, flags); 2176 } 2177 2178 2179 static void ftdi_unthrottle (struct usb_serial_port *port) 2180 { 2181 struct ftdi_private *priv = usb_get_serial_port_data(port); 2182 int actually_throttled; 2183 unsigned long flags; 2184 2185 dbg("%s - port %d", __FUNCTION__, port->number); 2186 2187 spin_lock_irqsave(&priv->rx_lock, flags); 2188 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; 2189 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 2190 spin_unlock_irqrestore(&priv->rx_lock, flags); 2191 2192 if (actually_throttled) 2193 schedule_delayed_work(&priv->rx_work, 0); 2194 } 2195 2196 static int __init ftdi_init (void) 2197 { 2198 int retval; 2199 2200 dbg("%s", __FUNCTION__); 2201 if (vendor > 0 && product > 0) { 2202 /* Add user specified VID/PID to reserved element of table. */ 2203 int i; 2204 for (i = 0; id_table_combined[i].idVendor; i++) 2205 ; 2206 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 2207 id_table_combined[i].idVendor = vendor; 2208 id_table_combined[i].idProduct = product; 2209 } 2210 retval = usb_serial_register(&ftdi_sio_device); 2211 if (retval) 2212 goto failed_sio_register; 2213 retval = usb_register(&ftdi_driver); 2214 if (retval) 2215 goto failed_usb_register; 2216 2217 info(DRIVER_VERSION ":" DRIVER_DESC); 2218 return 0; 2219 failed_usb_register: 2220 usb_serial_deregister(&ftdi_sio_device); 2221 failed_sio_register: 2222 return retval; 2223 } 2224 2225 2226 static void __exit ftdi_exit (void) 2227 { 2228 2229 dbg("%s", __FUNCTION__); 2230 2231 usb_deregister (&ftdi_driver); 2232 usb_serial_deregister (&ftdi_sio_device); 2233 2234 } 2235 2236 2237 module_init(ftdi_init); 2238 module_exit(ftdi_exit); 2239 2240 MODULE_AUTHOR( DRIVER_AUTHOR ); 2241 MODULE_DESCRIPTION( DRIVER_DESC ); 2242 MODULE_LICENSE("GPL"); 2243 2244 module_param(debug, bool, S_IRUGO | S_IWUSR); 2245 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2246 module_param(vendor, ushort, 0); 2247 MODULE_PARM_DESC(vendor, "User specified vendor ID (default=" 2248 __MODULE_STRING(FTDI_VID)")"); 2249 module_param(product, ushort, 0); 2250 MODULE_PARM_DESC(vendor, "User specified product ID"); 2251 2252