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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +01002 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
9 *
Craig Shelley39a66b82005-05-27 00:09:56 +010010 * Support to set flow control line levels using TIOCMGET and TIOCMSET
11 * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
12 * control thanks to Munir Nassar nassarmu@real-time.com
13 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 */
15
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/slab.h>
19#include <linux/tty.h>
20#include <linux/tty_flip.h>
21#include <linux/module.h>
22#include <linux/moduleparam.h>
23#include <linux/usb.h>
Alan Coxff7eb602008-07-22 11:10:17 +010024#include <linux/uaccess.h>
Greg Kroah-Hartmana9698882006-07-11 21:22:58 -070025#include <linux/usb/serial.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Craig Shelley4cc27bd2009-06-11 13:54:40 +010027#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29/*
30 * Function Prototypes
31 */
Alan Coxa509a7e2009-09-19 13:13:26 -070032static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010033static void cp210x_close(struct usb_serial_port *);
Johan Hovold4f2ab882012-10-29 10:56:19 +010034static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010035static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -070036 unsigned int *cflagp, unsigned int *baudp);
Johan Hovolde5990872012-01-16 00:36:51 +010037static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
38 struct ktermios *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010039static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
Alan Cox95da3102008-07-22 11:09:07 +010040 struct ktermios*);
Alan Cox60b33c12011-02-14 16:26:14 +000041static int cp210x_tiocmget(struct tty_struct *);
Alan Cox20b9d172011-02-14 16:26:50 +000042static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
43static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -070044 unsigned int, unsigned int);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010045static void cp210x_break_ctl(struct tty_struct *, int);
46static int cp210x_startup(struct usb_serial *);
Preston Ficka5360a52012-02-24 13:42:39 -060047static void cp210x_release(struct usb_serial *);
Alan Coxd94c7bd2009-10-28 21:12:33 +010048static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Németh Márton7d40d7e2010-01-10 15:34:24 +010050static const struct usb_device_id id_table[] = {
DJ Delorie2f1136d2010-09-17 11:09:06 -040051 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
M Kondrin5091b582008-11-14 13:02:45 +030052 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
Craig Shelley59fba742008-04-12 16:15:54 +010053 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
A E Lawrence5b22a322010-08-29 21:51:52 +010054 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010055 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
Luiz Angelo Daros de Luca90625072013-07-01 23:56:25 -030056 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
Edouard Lafargue1f4f7142007-09-25 10:15:36 +020057 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010058 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
Lennart Sorensena6f03312015-01-21 15:24:27 -050059 { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
Craig Shelleyeefd9022010-05-15 13:36:38 +010060 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
61 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
Craig Shelley198b9512005-08-28 09:51:15 +010062 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
Martin Kusserow014840e2007-12-21 12:02:17 +010063 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
Craig Shelley59fba742008-04-12 16:15:54 +010064 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
Luis Llorente Campo8de7f4d2013-01-31 13:37:05 +010065 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
Craig Shelley198b9512005-08-28 09:51:15 +010066 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000067 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010069 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
Amit Kucheria0601e112009-07-06 14:19:59 +030070 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
71 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +000072 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
Craig Shelley59224f52006-03-11 11:29:02 +000073 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
Craig Shelleyeefd9022010-05-15 13:36:38 +010074 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
75 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
Craig Shelley92f5cae2007-04-20 14:37:17 +010076 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
Damir N Abdullin9a18e752008-10-30 13:52:38 -070077 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
Vitja Makarov212a4b42006-05-31 00:40:06 +040078 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
Craig Shelleyeefd9022010-05-15 13:36:38 +010079 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000080 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
Mikko Tuumanen5bbfa6f2012-06-01 11:28:55 +030081 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
Craig Shelleye988fc82006-01-20 00:06:19 +000082 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
Craig Shelley92f5cae2007-04-20 14:37:17 +010083 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +000084 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
Craig Shelleyba0f3322008-09-04 21:28:21 +010085 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
Craig Shelleye988fc82006-01-20 00:06:19 +000086 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
Craig Shelley8bf16ba2009-07-12 21:52:33 +010087 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
Jon K Hellanfc4bd642007-02-28 23:04:33 +010088 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
Steve Conklina57e82a2013-03-07 17:19:33 -060090 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
Jason Detring0bf7a812010-08-26 15:08:54 -050091 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000092 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
Craig Shelley3fcc8f92012-06-26 23:20:04 +010093 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
Craig Shelleyeefd9022010-05-15 13:36:38 +010094 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
Robert M. Kenneyc6535662009-02-26 14:58:39 -050095 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
Bernhard Beck966236972008-05-11 09:23:13 -070096 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
Malte Schröder08e87d02012-01-05 20:34:40 +010097 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
Craig Shelley59fba742008-04-12 16:15:54 +010098 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
Craig Shelleyeefd9022010-05-15 13:36:38 +010099 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200100 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
101 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
Jeff Long8be27c22007-11-28 11:02:09 -0500102 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
Alan Coxbd07c552010-02-08 10:10:44 +0000103 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100104 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200105 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
Tomasz K877e2622009-01-04 12:47:11 +0100106 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300107 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
Tristan Bruns72b30072014-04-13 23:57:16 +0200108 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
Florian Fainellic851e832011-05-10 11:17:33 +0200109 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100110 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
Craig Shelleyba0f3322008-09-04 21:28:21 +0100111 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100112 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
Craig Shelley881e3c92008-11-09 20:17:54 +0000113 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000114 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100115 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000116 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
Alex Stephensd23bac92009-03-17 00:06:19 +0000117 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
Craig Shelley541e05e2010-08-23 20:50:57 +0100118 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000119 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
120 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
Markus Becker356fe442012-11-22 09:41:23 +0100121 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000122 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
123 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
David Peterson1ae78a42015-01-06 15:00:52 +0000124 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
125 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
Sami Rahman76811562013-07-08 14:28:55 -0400126 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
127 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
Joe Savagebfc2d7d2014-09-20 08:01:16 -0500128 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
David Peterson1ae78a42015-01-06 15:00:52 +0000129 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
Mark Edwardsc735ed72015-04-14 08:52:34 -0400130 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
Craig Shelleye988fc82006-01-20 00:06:19 +0000131 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
Craig Shelley61926b92006-10-12 22:09:56 +0100132 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
Preston Ficka5360a52012-02-24 13:42:39 -0600133 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
134 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100135 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000136 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
137 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
138 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
139 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
Pozsar Balazsebaf4942007-02-16 12:47:49 +0100140 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100141 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
Johannes Hoelzle05998d2006-12-02 16:54:27 +0100142 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100143 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100144 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
145 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000146 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100147 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
148 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
149 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
150 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
Michiel vd Garde675af702015-02-27 02:08:29 +0100151 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
152 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
Josef Balatkab0ce84d2005-11-17 09:47:24 -0800153 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
Alessio Igor Bogani356c5a42010-07-27 23:05:14 +0200154 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
155 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
156 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
157 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
Bruno Thomsenc6c1e442012-02-21 23:41:37 +0100158 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
159 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
Craig Shelley541e05e2010-08-23 20:50:57 +0100160 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
161 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
162 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
Barry Grusslingb579fa52013-07-19 14:46:12 -0700163 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
Andras Kovacsb9326052014-06-27 14:50:11 +0200164 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
Nathaniel Ting35cc83e2014-10-03 12:01:20 -0400165 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
Anders Larsen93ad03d2010-10-06 23:46:25 +0200166 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
Andreas Bomholtzdee80ad2014-09-22 09:50:43 +0200167 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100168 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
169 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
Matwey V. Kornilovbe3101c2013-03-09 13:57:32 +0400170 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
171 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
172 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
173 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
174 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
175 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
176 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
177 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
178 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
179 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
180 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
181 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
182 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
183 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
184 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
185 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
186 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
187 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
188 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
Renato Caldas791b7d72012-01-06 15:20:51 +0000189 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100190 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
191 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
Craig Shelley541e05e2010-08-23 20:50:57 +0100192 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
Craig Shelley39a66b82005-05-27 00:09:56 +0100193 { } /* Terminating Entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194};
195
Alan Coxff7eb602008-07-22 11:10:17 +0100196MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Johan Hovold4295fe72012-10-15 15:47:20 +0200198struct cp210x_serial_private {
Preston Ficka5360a52012-02-24 13:42:39 -0600199 __u8 bInterfaceNumber;
200};
201
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100202static struct usb_serial_driver cp210x_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700203 .driver = {
204 .owner = THIS_MODULE,
Johan Hovold4f2ab882012-10-29 10:56:19 +0100205 .name = "cp210x",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700206 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 .num_ports = 1,
Johan Hovoldaea006b2010-03-17 23:00:39 +0100209 .bulk_in_size = 256,
Johan Hovoldd4e598f2010-03-17 23:00:38 +0100210 .bulk_out_size = 256,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100211 .open = cp210x_open,
212 .close = cp210x_close,
213 .break_ctl = cp210x_break_ctl,
214 .set_termios = cp210x_set_termios,
Johan Hovold4f2ab882012-10-29 10:56:19 +0100215 .tiocmget = cp210x_tiocmget,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100216 .tiocmset = cp210x_tiocmset,
217 .attach = cp210x_startup,
Preston Ficka5360a52012-02-24 13:42:39 -0600218 .release = cp210x_release,
Libor Pechacekd14fc1a2011-01-14 14:30:21 +0100219 .dtr_rts = cp210x_dtr_rts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220};
221
Alan Stern08a4f6b2012-02-23 14:56:17 -0500222static struct usb_serial_driver * const serial_drivers[] = {
223 &cp210x_device, NULL
224};
225
Craig Shelley39a66b82005-05-27 00:09:56 +0100226/* Config request types */
Preston Fick32445602012-04-30 23:06:48 -0500227#define REQTYPE_HOST_TO_INTERFACE 0x41
228#define REQTYPE_INTERFACE_TO_HOST 0xc1
229#define REQTYPE_HOST_TO_DEVICE 0x40
230#define REQTYPE_DEVICE_TO_HOST 0xc0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Craig Shelley93ef1f12009-06-11 13:53:30 +0100232/* Config request codes */
233#define CP210X_IFC_ENABLE 0x00
234#define CP210X_SET_BAUDDIV 0x01
235#define CP210X_GET_BAUDDIV 0x02
236#define CP210X_SET_LINE_CTL 0x03
237#define CP210X_GET_LINE_CTL 0x04
238#define CP210X_SET_BREAK 0x05
239#define CP210X_IMM_CHAR 0x06
240#define CP210X_SET_MHS 0x07
241#define CP210X_GET_MDMSTS 0x08
242#define CP210X_SET_XON 0x09
243#define CP210X_SET_XOFF 0x0A
244#define CP210X_SET_EVENTMASK 0x0B
245#define CP210X_GET_EVENTMASK 0x0C
246#define CP210X_SET_CHAR 0x0D
247#define CP210X_GET_CHARS 0x0E
248#define CP210X_GET_PROPS 0x0F
249#define CP210X_GET_COMM_STATUS 0x10
250#define CP210X_RESET 0x11
251#define CP210X_PURGE 0x12
252#define CP210X_SET_FLOW 0x13
253#define CP210X_GET_FLOW 0x14
254#define CP210X_EMBED_EVENTS 0x15
255#define CP210X_GET_EVENTSTATE 0x16
256#define CP210X_SET_CHARS 0x19
Preston Fick7f482fc2012-01-16 18:14:09 -0600257#define CP210X_GET_BAUDRATE 0x1D
258#define CP210X_SET_BAUDRATE 0x1E
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Craig Shelley93ef1f12009-06-11 13:53:30 +0100260/* CP210X_IFC_ENABLE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261#define UART_ENABLE 0x0001
262#define UART_DISABLE 0x0000
263
Craig Shelley93ef1f12009-06-11 13:53:30 +0100264/* CP210X_(SET|GET)_BAUDDIV */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265#define BAUD_RATE_GEN_FREQ 0x384000
266
Craig Shelley93ef1f12009-06-11 13:53:30 +0100267/* CP210X_(SET|GET)_LINE_CTL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268#define BITS_DATA_MASK 0X0f00
Craig Shelley39a66b82005-05-27 00:09:56 +0100269#define BITS_DATA_5 0X0500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270#define BITS_DATA_6 0X0600
271#define BITS_DATA_7 0X0700
272#define BITS_DATA_8 0X0800
273#define BITS_DATA_9 0X0900
274
275#define BITS_PARITY_MASK 0x00f0
276#define BITS_PARITY_NONE 0x0000
277#define BITS_PARITY_ODD 0x0010
278#define BITS_PARITY_EVEN 0x0020
279#define BITS_PARITY_MARK 0x0030
280#define BITS_PARITY_SPACE 0x0040
281
282#define BITS_STOP_MASK 0x000f
283#define BITS_STOP_1 0x0000
284#define BITS_STOP_1_5 0x0001
285#define BITS_STOP_2 0x0002
Craig Shelley39a66b82005-05-27 00:09:56 +0100286
Craig Shelley93ef1f12009-06-11 13:53:30 +0100287/* CP210X_SET_BREAK */
Craig Shelley72916792010-08-18 22:13:39 +0100288#define BREAK_ON 0x0001
289#define BREAK_OFF 0x0000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
Craig Shelley93ef1f12009-06-11 13:53:30 +0100291/* CP210X_(SET_MHS|GET_MDMSTS) */
Craig Shelley39a66b82005-05-27 00:09:56 +0100292#define CONTROL_DTR 0x0001
293#define CONTROL_RTS 0x0002
294#define CONTROL_CTS 0x0010
295#define CONTROL_DSR 0x0020
296#define CONTROL_RING 0x0040
297#define CONTROL_DCD 0x0080
298#define CONTROL_WRITE_DTR 0x0100
299#define CONTROL_WRITE_RTS 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Craig Shelley39a66b82005-05-27 00:09:56 +0100301/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100302 * cp210x_get_config
303 * Reads from the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100304 * 'size' is specified in bytes.
305 * 'data' is a pointer to a pre-allocated array of integers large
306 * enough to hold 'size' bytes (with 4 bytes to each integer)
307 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100308static int cp210x_get_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100309 unsigned int *data, int size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310{
311 struct usb_serial *serial = port->serial;
Johan Hovold4295fe72012-10-15 15:47:20 +0200312 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
Al Viro53ebb3b2007-02-09 16:39:55 +0000313 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100314 int result, i, length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
Craig Shelley39a66b82005-05-27 00:09:56 +0100316 /* Number of integers required to contain the array */
Johan Hovold4f2ab882012-10-29 10:56:19 +0100317 length = (((size - 1) | 3) + 1) / 4;
Craig Shelley39a66b82005-05-27 00:09:56 +0100318
Al Viro53ebb3b2007-02-09 16:39:55 +0000319 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
Johan Hovold10c642d2013-12-29 19:22:56 +0100320 if (!buf)
Craig Shelley39a66b82005-05-27 00:09:56 +0100321 return -ENOMEM;
Craig Shelley39a66b82005-05-27 00:09:56 +0100322
Craig Shelley39a66b82005-05-27 00:09:56 +0100323 /* Issue the request, attempting to read 'size' bytes */
Alan Coxff7eb602008-07-22 11:10:17 +0100324 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
Preston Fick32445602012-04-30 23:06:48 -0500325 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
Johan Hovold4295fe72012-10-15 15:47:20 +0200326 spriv->bInterfaceNumber, buf, size,
Yuri Matylitski2d5733f2012-04-20 12:38:32 +0300327 USB_CTRL_GET_TIMEOUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
Craig Shelley39a66b82005-05-27 00:09:56 +0100329 /* Convert data into an array of integers */
Alan Coxff7eb602008-07-22 11:10:17 +0100330 for (i = 0; i < length; i++)
Craig Shelley39a66b82005-05-27 00:09:56 +0100331 data[i] = le32_to_cpu(buf[i]);
332
333 kfree(buf);
334
335 if (result != size) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700336 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
337 __func__, request, size, result);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100338 if (result > 0)
339 result = -EPROTO;
340
341 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 }
343
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 return 0;
345}
346
Craig Shelley39a66b82005-05-27 00:09:56 +0100347/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100348 * cp210x_set_config
349 * Writes to the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100350 * Values less than 16 bits wide are sent directly
351 * 'size' is specified in bytes.
352 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100353static int cp210x_set_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100354 unsigned int *data, int size)
355{
356 struct usb_serial *serial = port->serial;
Johan Hovold4295fe72012-10-15 15:47:20 +0200357 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
Al Viro53ebb3b2007-02-09 16:39:55 +0000358 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100359 int result, i, length;
360
361 /* Number of integers required to contain the array */
Johan Hovold4f2ab882012-10-29 10:56:19 +0100362 length = (((size - 1) | 3) + 1) / 4;
Craig Shelley39a66b82005-05-27 00:09:56 +0100363
Al Viro53ebb3b2007-02-09 16:39:55 +0000364 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
Johan Hovold10c642d2013-12-29 19:22:56 +0100365 if (!buf)
Craig Shelley39a66b82005-05-27 00:09:56 +0100366 return -ENOMEM;
Craig Shelley39a66b82005-05-27 00:09:56 +0100367
368 /* Array of integers into bytes */
369 for (i = 0; i < length; i++)
370 buf[i] = cpu_to_le32(data[i]);
371
372 if (size > 2) {
Alan Coxff7eb602008-07-22 11:10:17 +0100373 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100374 usb_sndctrlpipe(serial->dev, 0),
Preston Fick32445602012-04-30 23:06:48 -0500375 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
Johan Hovold4295fe72012-10-15 15:47:20 +0200376 spriv->bInterfaceNumber, buf, size,
Yuri Matylitski2d5733f2012-04-20 12:38:32 +0300377 USB_CTRL_SET_TIMEOUT);
Craig Shelley39a66b82005-05-27 00:09:56 +0100378 } else {
Alan Coxff7eb602008-07-22 11:10:17 +0100379 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100380 usb_sndctrlpipe(serial->dev, 0),
Preston Fick32445602012-04-30 23:06:48 -0500381 request, REQTYPE_HOST_TO_INTERFACE, data[0],
Johan Hovold4295fe72012-10-15 15:47:20 +0200382 spriv->bInterfaceNumber, NULL, 0,
Yuri Matylitski2d5733f2012-04-20 12:38:32 +0300383 USB_CTRL_SET_TIMEOUT);
Craig Shelley39a66b82005-05-27 00:09:56 +0100384 }
385
386 kfree(buf);
387
388 if ((size > 2 && result != size) || result < 0) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700389 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
390 __func__, request, size, result);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100391 if (result > 0)
392 result = -EPROTO;
393
394 return result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100395 }
396
Craig Shelley39a66b82005-05-27 00:09:56 +0100397 return 0;
398}
399
400/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100401 * cp210x_set_config_single
402 * Convenience function for calling cp210x_set_config on single data values
Craig Shelley39a66b82005-05-27 00:09:56 +0100403 * without requiring an integer pointer
404 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100405static inline int cp210x_set_config_single(struct usb_serial_port *port,
Craig Shelley39a66b82005-05-27 00:09:56 +0100406 u8 request, unsigned int data)
407{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100408 return cp210x_set_config(port, request, &data, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100409}
410
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000411/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100412 * cp210x_quantise_baudrate
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000413 * Quantises the baud rate as per AN205 Table 1
414 */
Johan Hovold4f2ab882012-10-29 10:56:19 +0100415static unsigned int cp210x_quantise_baudrate(unsigned int baud)
416{
Johan Hovoldbe125d92012-01-16 00:36:50 +0100417 if (baud <= 300)
418 baud = 300;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000419 else if (baud <= 600) baud = 600;
420 else if (baud <= 1200) baud = 1200;
421 else if (baud <= 1800) baud = 1800;
422 else if (baud <= 2400) baud = 2400;
423 else if (baud <= 4000) baud = 4000;
424 else if (baud <= 4803) baud = 4800;
425 else if (baud <= 7207) baud = 7200;
426 else if (baud <= 9612) baud = 9600;
427 else if (baud <= 14428) baud = 14400;
428 else if (baud <= 16062) baud = 16000;
429 else if (baud <= 19250) baud = 19200;
430 else if (baud <= 28912) baud = 28800;
431 else if (baud <= 38601) baud = 38400;
432 else if (baud <= 51558) baud = 51200;
433 else if (baud <= 56280) baud = 56000;
434 else if (baud <= 58053) baud = 57600;
435 else if (baud <= 64111) baud = 64000;
436 else if (baud <= 77608) baud = 76800;
437 else if (baud <= 117028) baud = 115200;
438 else if (baud <= 129347) baud = 128000;
439 else if (baud <= 156868) baud = 153600;
440 else if (baud <= 237832) baud = 230400;
441 else if (baud <= 254234) baud = 250000;
442 else if (baud <= 273066) baud = 256000;
443 else if (baud <= 491520) baud = 460800;
444 else if (baud <= 567138) baud = 500000;
445 else if (baud <= 670254) baud = 576000;
Johan Hovoldd1620ca2012-01-16 00:36:53 +0100446 else if (baud < 1000000)
447 baud = 921600;
448 else if (baud > 2000000)
449 baud = 2000000;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000450 return baud;
451}
452
Alan Coxa509a7e2009-09-19 13:13:26 -0700453static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 int result;
456
Johan Hovold2479e2a2011-11-10 14:58:29 +0100457 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
458 UART_ENABLE);
459 if (result) {
460 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
461 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 }
463
Craig Shelley39a66b82005-05-27 00:09:56 +0100464 /* Configure the termios structure */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100465 cp210x_get_termios(tty, port);
Johan Hovold55b2afb2012-01-16 00:36:48 +0100466
Johan Hovoldcdc32fd2012-01-16 00:36:52 +0100467 /* The baud rate must be initialised on cp2104 */
468 if (tty)
469 cp210x_change_speed(tty, port, NULL);
470
Johan Hovold55b2afb2012-01-16 00:36:48 +0100471 return usb_serial_generic_open(tty, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472}
473
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100474static void cp210x_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475{
Johan Hovoldf26788d2010-03-17 23:00:45 +0100476 usb_serial_generic_close(port);
Johan Hovoldecb9eb82013-03-21 12:37:36 +0100477 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
479
Craig Shelley39a66b82005-05-27 00:09:56 +0100480/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100481 * cp210x_get_termios
Craig Shelley39a66b82005-05-27 00:09:56 +0100482 * Reads the baud rate, data bits, parity, stop bits and flow control mode
483 * from the device, corrects any unsupported values, and configures the
484 * termios structure to reflect the state of the device
485 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100486static void cp210x_get_termios(struct tty_struct *tty,
VomLehnd2ad67b2009-03-12 14:37:42 -0700487 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488{
VomLehnd2ad67b2009-03-12 14:37:42 -0700489 unsigned int baud;
490
491 if (tty) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100492 cp210x_get_termios_port(tty->driver_data,
Alan Coxadc8d742012-07-14 15:31:47 +0100493 &tty->termios.c_cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700494 tty_encode_baud_rate(tty, baud, baud);
Johan Hovold4f2ab882012-10-29 10:56:19 +0100495 } else {
VomLehnd2ad67b2009-03-12 14:37:42 -0700496 unsigned int cflag;
497 cflag = 0;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100498 cp210x_get_termios_port(port, &cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700499 }
500}
501
502/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100503 * cp210x_get_termios_port
504 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
VomLehnd2ad67b2009-03-12 14:37:42 -0700505 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100506static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700507 unsigned int *cflagp, unsigned int *baudp)
508{
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700509 struct device *dev = &port->dev;
Craig Shelley39a66b82005-05-27 00:09:56 +0100510 unsigned int cflag, modem_ctl[4];
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700511 unsigned int baud;
512 unsigned int bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Preston Fick7f482fc2012-01-16 18:14:09 -0600514 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700516 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700517 *baudp = baud;
Alan Cox9ab0f202007-10-18 01:24:24 -0700518
VomLehnd2ad67b2009-03-12 14:37:42 -0700519 cflag = *cflagp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100521 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 cflag &= ~CSIZE;
Alan Coxff7eb602008-07-22 11:10:17 +0100523 switch (bits & BITS_DATA_MASK) {
524 case BITS_DATA_5:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700525 dev_dbg(dev, "%s - data bits = 5\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100526 cflag |= CS5;
527 break;
528 case BITS_DATA_6:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700529 dev_dbg(dev, "%s - data bits = 6\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100530 cflag |= CS6;
531 break;
532 case BITS_DATA_7:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700533 dev_dbg(dev, "%s - data bits = 7\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100534 cflag |= CS7;
535 break;
536 case BITS_DATA_8:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700537 dev_dbg(dev, "%s - data bits = 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100538 cflag |= CS8;
539 break;
540 case BITS_DATA_9:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700541 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100542 cflag |= CS8;
543 bits &= ~BITS_DATA_MASK;
544 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100545 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100546 break;
547 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700548 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100549 cflag |= CS8;
550 bits &= ~BITS_DATA_MASK;
551 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100552 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100553 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 }
555
Alan Coxff7eb602008-07-22 11:10:17 +0100556 switch (bits & BITS_PARITY_MASK) {
557 case BITS_PARITY_NONE:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700558 dev_dbg(dev, "%s - parity = NONE\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100559 cflag &= ~PARENB;
560 break;
561 case BITS_PARITY_ODD:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700562 dev_dbg(dev, "%s - parity = ODD\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100563 cflag |= (PARENB|PARODD);
564 break;
565 case BITS_PARITY_EVEN:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700566 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100567 cflag &= ~PARODD;
568 cflag |= PARENB;
569 break;
570 case BITS_PARITY_MARK:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700571 dev_dbg(dev, "%s - parity = MARK\n", __func__);
Roland Koebler4b6181c2011-11-09 19:37:08 +0100572 cflag |= (PARENB|PARODD|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100573 break;
574 case BITS_PARITY_SPACE:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700575 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
Roland Koebler4b6181c2011-11-09 19:37:08 +0100576 cflag &= ~PARODD;
577 cflag |= (PARENB|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100578 break;
579 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700580 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100581 cflag &= ~PARENB;
582 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100583 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100584 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 }
586
587 cflag &= ~CSTOPB;
Alan Coxff7eb602008-07-22 11:10:17 +0100588 switch (bits & BITS_STOP_MASK) {
589 case BITS_STOP_1:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700590 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100591 break;
592 case BITS_STOP_1_5:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700593 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100594 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100595 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100596 break;
597 case BITS_STOP_2:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700598 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100599 cflag |= CSTOPB;
600 break;
601 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700602 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100603 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100604 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100605 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 }
607
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100608 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100609 if (modem_ctl[0] & 0x0008) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700610 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100611 cflag |= CRTSCTS;
612 } else {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700613 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100614 cflag &= ~CRTSCTS;
615 }
616
VomLehnd2ad67b2009-03-12 14:37:42 -0700617 *cflagp = cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618}
619
Johan Hovolde5990872012-01-16 00:36:51 +0100620/*
621 * CP2101 supports the following baud rates:
622 *
623 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
624 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
625 *
626 * CP2102 and CP2103 support the following additional rates:
627 *
628 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
629 * 576000
630 *
631 * The device will map a requested rate to a supported one, but the result
632 * of requests for rates greater than 1053257 is undefined (see AN205).
633 *
634 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
635 * respectively, with an error less than 1%. The actual rates are determined
636 * by
637 *
638 * div = round(freq / (2 x prescale x request))
639 * actual = freq / (2 x prescale x div)
640 *
641 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
642 * or 1 otherwise.
643 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
644 * otherwise.
645 */
646static void cp210x_change_speed(struct tty_struct *tty,
647 struct usb_serial_port *port, struct ktermios *old_termios)
648{
649 u32 baud;
650
Alan Coxadc8d742012-07-14 15:31:47 +0100651 baud = tty->termios.c_ospeed;
Johan Hovolde5990872012-01-16 00:36:51 +0100652
Johan Hovoldd1620ca2012-01-16 00:36:53 +0100653 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
654 * or to an arbitrary rate in [1M,2M].
Johan Hovolde5990872012-01-16 00:36:51 +0100655 *
656 * NOTE: B0 is not implemented.
657 */
658 baud = cp210x_quantise_baudrate(baud);
659
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700660 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
Johan Hovolde5990872012-01-16 00:36:51 +0100661 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
662 sizeof(baud))) {
663 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
664 if (old_termios)
665 baud = old_termios->c_ospeed;
666 else
667 baud = 9600;
668 }
669
670 tty_encode_baud_rate(tty, baud, baud);
671}
672
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100673static void cp210x_set_termios(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100674 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675{
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700676 struct device *dev = &port->dev;
Alan Cox9ab0f202007-10-18 01:24:24 -0700677 unsigned int cflag, old_cflag;
Johan Hovold34b76fc2012-01-16 00:36:49 +0100678 unsigned int bits;
Craig Shelley39a66b82005-05-27 00:09:56 +0100679 unsigned int modem_ctl[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Alan Coxadc8d742012-07-14 15:31:47 +0100681 cflag = tty->termios.c_cflag;
Alan Cox01e96d22007-07-26 18:54:12 +0100682 old_cflag = old_termios->c_cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
Alan Coxadc8d742012-07-14 15:31:47 +0100684 if (tty->termios.c_ospeed != old_termios->c_ospeed)
Johan Hovolde5990872012-01-16 00:36:51 +0100685 cp210x_change_speed(tty, port, old_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Craig Shelley39a66b82005-05-27 00:09:56 +0100687 /* If the number of data bits is to be updated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100689 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 bits &= ~BITS_DATA_MASK;
691 switch (cflag & CSIZE) {
Alan Coxff7eb602008-07-22 11:10:17 +0100692 case CS5:
693 bits |= BITS_DATA_5;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700694 dev_dbg(dev, "%s - data bits = 5\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100695 break;
696 case CS6:
697 bits |= BITS_DATA_6;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700698 dev_dbg(dev, "%s - data bits = 6\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100699 break;
700 case CS7:
701 bits |= BITS_DATA_7;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700702 dev_dbg(dev, "%s - data bits = 7\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100703 break;
704 case CS8:
705 bits |= BITS_DATA_8;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700706 dev_dbg(dev, "%s - data bits = 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100707 break;
708 /*case CS9:
709 bits |= BITS_DATA_9;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700710 dev_dbg(dev, "%s - data bits = 9\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100711 break;*/
712 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700713 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
Johan Hovold4f2ab882012-10-29 10:56:19 +0100714 bits |= BITS_DATA_8;
715 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100717 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700718 dev_dbg(dev, "Number of data bits requested not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 }
720
Roland Koebler4b6181c2011-11-09 19:37:08 +0100721 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
722 (old_cflag & (PARENB|PARODD|CMSPAR))) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100723 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 bits &= ~BITS_PARITY_MASK;
725 if (cflag & PARENB) {
Roland Koebler4b6181c2011-11-09 19:37:08 +0100726 if (cflag & CMSPAR) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700727 if (cflag & PARODD) {
728 bits |= BITS_PARITY_MARK;
729 dev_dbg(dev, "%s - parity = MARK\n", __func__);
730 } else {
731 bits |= BITS_PARITY_SPACE;
732 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
733 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 } else {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700735 if (cflag & PARODD) {
736 bits |= BITS_PARITY_ODD;
737 dev_dbg(dev, "%s - parity = ODD\n", __func__);
738 } else {
739 bits |= BITS_PARITY_EVEN;
740 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
741 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 }
743 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100744 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700745 dev_dbg(dev, "Parity mode not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 }
747
748 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100749 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 bits &= ~BITS_STOP_MASK;
751 if (cflag & CSTOPB) {
752 bits |= BITS_STOP_2;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700753 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 } else {
755 bits |= BITS_STOP_1;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700756 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100758 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700759 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100761
762 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100763 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700764 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
765 __func__, modem_ctl[0], modem_ctl[1],
766 modem_ctl[2], modem_ctl[3]);
Craig Shelley39a66b82005-05-27 00:09:56 +0100767
768 if (cflag & CRTSCTS) {
769 modem_ctl[0] &= ~0x7B;
770 modem_ctl[0] |= 0x09;
771 modem_ctl[1] = 0x80;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700772 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100773 } else {
774 modem_ctl[0] &= ~0x7B;
775 modem_ctl[0] |= 0x01;
776 modem_ctl[1] |= 0x40;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700777 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100778 }
779
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700780 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
781 __func__, modem_ctl[0], modem_ctl[1],
782 modem_ctl[2], modem_ctl[3]);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100783 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100784 }
785
786}
787
Johan Hovold4f2ab882012-10-29 10:56:19 +0100788static int cp210x_tiocmset(struct tty_struct *tty,
Craig Shelley39a66b82005-05-27 00:09:56 +0100789 unsigned int set, unsigned int clear)
790{
Alan Cox95da3102008-07-22 11:09:07 +0100791 struct usb_serial_port *port = tty->driver_data;
Alan Cox20b9d172011-02-14 16:26:50 +0000792 return cp210x_tiocmset_port(port, set, clear);
VomLehnd2ad67b2009-03-12 14:37:42 -0700793}
794
Alan Cox20b9d172011-02-14 16:26:50 +0000795static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700796 unsigned int set, unsigned int clear)
797{
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700798 unsigned int control = 0;
Craig Shelley39a66b82005-05-27 00:09:56 +0100799
Craig Shelley39a66b82005-05-27 00:09:56 +0100800 if (set & TIOCM_RTS) {
801 control |= CONTROL_RTS;
802 control |= CONTROL_WRITE_RTS;
803 }
804 if (set & TIOCM_DTR) {
805 control |= CONTROL_DTR;
806 control |= CONTROL_WRITE_DTR;
807 }
808 if (clear & TIOCM_RTS) {
809 control &= ~CONTROL_RTS;
810 control |= CONTROL_WRITE_RTS;
811 }
812 if (clear & TIOCM_DTR) {
813 control &= ~CONTROL_DTR;
814 control |= CONTROL_WRITE_DTR;
815 }
816
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700817 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100818
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100819 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100820}
821
Alan Coxd94c7bd2009-10-28 21:12:33 +0100822static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
823{
824 if (on)
Alan Cox20b9d172011-02-14 16:26:50 +0000825 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100826 else
Alan Cox20b9d172011-02-14 16:26:50 +0000827 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100828}
829
Johan Hovold4f2ab882012-10-29 10:56:19 +0100830static int cp210x_tiocmget(struct tty_struct *tty)
Craig Shelley39a66b82005-05-27 00:09:56 +0100831{
Alan Cox95da3102008-07-22 11:09:07 +0100832 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700833 unsigned int control;
834 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100835
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100836 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
Craig Shelley39a66b82005-05-27 00:09:56 +0100837
838 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
839 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
840 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
841 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
842 |((control & CONTROL_RING)? TIOCM_RI : 0)
843 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
844
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700845 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100846
847 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848}
849
Johan Hovold4f2ab882012-10-29 10:56:19 +0100850static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851{
Alan Cox95da3102008-07-22 11:09:07 +0100852 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700853 unsigned int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 if (break_state == 0)
856 state = BREAK_OFF;
857 else
858 state = BREAK_ON;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700859 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
860 state == BREAK_OFF ? "off" : "on");
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100861 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862}
863
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100864static int cp210x_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865{
Johan Hovold4295fe72012-10-15 15:47:20 +0200866 struct usb_host_interface *cur_altsetting;
867 struct cp210x_serial_private *spriv;
Preston Ficka5360a52012-02-24 13:42:39 -0600868
Johan Hovold4295fe72012-10-15 15:47:20 +0200869 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
870 if (!spriv)
871 return -ENOMEM;
Preston Ficka5360a52012-02-24 13:42:39 -0600872
Johan Hovold4295fe72012-10-15 15:47:20 +0200873 cur_altsetting = serial->interface->cur_altsetting;
874 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
Preston Ficka5360a52012-02-24 13:42:39 -0600875
Johan Hovold4295fe72012-10-15 15:47:20 +0200876 usb_set_serial_data(serial, spriv);
Preston Ficka5360a52012-02-24 13:42:39 -0600877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 return 0;
879}
880
Preston Ficka5360a52012-02-24 13:42:39 -0600881static void cp210x_release(struct usb_serial *serial)
882{
Johan Hovold4295fe72012-10-15 15:47:20 +0200883 struct cp210x_serial_private *spriv;
Preston Ficka5360a52012-02-24 13:42:39 -0600884
Johan Hovold4295fe72012-10-15 15:47:20 +0200885 spriv = usb_get_serial_data(serial);
886 kfree(spriv);
Preston Ficka5360a52012-02-24 13:42:39 -0600887}
888
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -0700889module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
891MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892MODULE_LICENSE("GPL");