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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*);
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -060041static bool cp210x_tx_empty(struct usb_serial_port *port);
Alan Cox60b33c12011-02-14 16:26:14 +000042static int cp210x_tiocmget(struct tty_struct *);
Alan Cox20b9d172011-02-14 16:26:50 +000043static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
44static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -070045 unsigned int, unsigned int);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010046static void cp210x_break_ctl(struct tty_struct *, int);
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -050047static int cp210x_port_probe(struct usb_serial_port *);
48static int cp210x_port_remove(struct usb_serial_port *);
Alan Coxd94c7bd2009-10-28 21:12:33 +010049static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Németh Márton7d40d7e2010-01-10 15:34:24 +010051static const struct usb_device_id id_table[] = {
DJ Delorie2f1136d2010-09-17 11:09:06 -040052 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
M Kondrin5091b582008-11-14 13:02:45 +030053 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
Craig Shelley59fba742008-04-12 16:15:54 +010054 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
A E Lawrence5b22a322010-08-29 21:51:52 +010055 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010056 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
Luiz Angelo Daros de Luca90625072013-07-01 23:56:25 -030057 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
Edouard Lafargue1f4f7142007-09-25 10:15:36 +020058 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010059 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
Lennart Sorensena6f03312015-01-21 15:24:27 -050060 { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
Craig Shelleyeefd9022010-05-15 13:36:38 +010061 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
62 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
Craig Shelley198b9512005-08-28 09:51:15 +010063 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
Martin Kusserow014840e2007-12-21 12:02:17 +010064 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
Craig Shelley59fba742008-04-12 16:15:54 +010065 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
Luis Llorente Campo8de7f4d2013-01-31 13:37:05 +010066 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
Craig Shelley198b9512005-08-28 09:51:15 +010067 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000068 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010070 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
Amit Kucheria0601e112009-07-06 14:19:59 +030071 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +000073 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
Craig Shelley59224f52006-03-11 11:29:02 +000074 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
Craig Shelleyeefd9022010-05-15 13:36:38 +010075 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
76 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
Craig Shelley92f5cae2007-04-20 14:37:17 +010077 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
Damir N Abdullin9a18e752008-10-30 13:52:38 -070078 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
Vitja Makarov212a4b42006-05-31 00:40:06 +040079 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
Craig Shelleyeefd9022010-05-15 13:36:38 +010080 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000081 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
Mikko Tuumanen5bbfa6f2012-06-01 11:28:55 +030082 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
Craig Shelleye988fc82006-01-20 00:06:19 +000083 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
Craig Shelley92f5cae2007-04-20 14:37:17 +010084 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +000085 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
Craig Shelleyba0f3322008-09-04 21:28:21 +010086 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
Craig Shelleye988fc82006-01-20 00:06:19 +000087 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
Craig Shelley8bf16ba2009-07-12 21:52:33 +010088 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
Jon K Hellanfc4bd642007-02-28 23:04:33 +010089 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
90 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
Steve Conklina57e82a2013-03-07 17:19:33 -060091 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
Jason Detring0bf7a812010-08-26 15:08:54 -050092 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000093 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
Craig Shelley3fcc8f92012-06-26 23:20:04 +010094 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
Craig Shelleyeefd9022010-05-15 13:36:38 +010095 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
Robert M. Kenneyc6535662009-02-26 14:58:39 -050096 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
Bernhard Beck966236972008-05-11 09:23:13 -070097 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
Malte Schröder08e87d02012-01-05 20:34:40 +010098 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
Craig Shelley59fba742008-04-12 16:15:54 +010099 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100100 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200101 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
Peter Dedeckerf487c542016-01-08 12:34:41 +0100102 { USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200103 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
Jeff Long8be27c22007-11-28 11:02:09 -0500104 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
Alan Coxbd07c552010-02-08 10:10:44 +0000105 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100106 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200107 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
Tomasz K877e2622009-01-04 12:47:11 +0100108 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300109 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
Tristan Bruns72b30072014-04-13 23:57:16 +0200110 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
Florian Fainellic851e832011-05-10 11:17:33 +0200111 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
Jasem Mutlaq613ac232016-04-19 10:38:27 +0300112 { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100113 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
Craig Shelleyba0f3322008-09-04 21:28:21 +0100114 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100115 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
Craig Shelley881e3c92008-11-09 20:17:54 +0000116 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000117 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100118 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000119 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
Alex Stephensd23bac92009-03-17 00:06:19 +0000120 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
Kyle Jonesdecc5362016-09-23 13:28:37 -0500121 { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
Craig Shelley541e05e2010-08-23 20:50:57 +0100122 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
Jasem Mutlaq613ac232016-04-19 10:38:27 +0300123 { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000124 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
125 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
Markus Becker356fe442012-11-22 09:41:23 +0100126 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000127 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
128 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
David Peterson1ae78a42015-01-06 15:00:52 +0000129 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
130 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
Sami Rahman76811562013-07-08 14:28:55 -0400131 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
132 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
Joe Savagebfc2d7d2014-09-20 08:01:16 -0500133 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
Paul Jakma2ab13292016-11-16 10:13:49 +0000134 { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
David Peterson1ae78a42015-01-06 15:00:52 +0000135 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
Mark Edwardsc735ed72015-04-14 08:52:34 -0400136 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
John D. Blairdf72d582015-06-04 13:18:19 -0700137 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
Jeremie Rapinda8990d2017-06-28 18:23:25 +0200138 { USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
Stefan Triller56651642017-06-30 14:44:03 +0200139 { USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
Craig Shelleye988fc82006-01-20 00:06:19 +0000140 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
Craig Shelley61926b92006-10-12 22:09:56 +0100141 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
Preston Ficka5360a52012-02-24 13:42:39 -0600142 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100143 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000144 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
145 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
146 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
147 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
Pozsar Balazsebaf4942007-02-16 12:47:49 +0100148 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100149 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
Mike Manning1d377f42016-04-18 12:13:23 +0000150 { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */
151 { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
Johannes Hoelzle05998d2006-12-02 16:54:27 +0100152 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100153 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100154 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
155 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000156 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100157 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
158 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
159 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
160 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
Michiel vd Garde675af702015-02-27 02:08:29 +0100161 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
162 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
Josef Balatkab0ce84d2005-11-17 09:47:24 -0800163 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
Alessio Igor Bogani356c5a42010-07-27 23:05:14 +0200164 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
165 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
166 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
167 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
Bruno Thomsenc6c1e442012-02-21 23:41:37 +0100168 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
169 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
Craig Shelley541e05e2010-08-23 20:50:57 +0100170 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
171 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
172 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
Oliver Freyermuthf7d7f592015-12-28 18:37:38 +0100173 { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
Ken Lin6627ae12016-02-01 14:57:25 -0500174 { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
175 { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
Martyn Welchcddc9432016-03-29 17:47:29 +0100176 { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
Ken Lin4420e0f2017-02-04 04:00:24 +0800177 { USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
178 { USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
Vittorio Alfieri3c4c6152016-02-28 14:40:24 +0100179 { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
Barry Grusslingb579fa52013-07-19 14:46:12 -0700180 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
Andras Kovacsb9326052014-06-27 14:50:11 +0200181 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
Nathaniel Ting35cc83e2014-10-03 12:01:20 -0400182 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
Anders Larsen93ad03d2010-10-06 23:46:25 +0200183 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
Andreas Bomholtzdee80ad2014-09-22 09:50:43 +0200184 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100185 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
186 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
Matwey V. Kornilovbe3101c2013-03-09 13:57:32 +0400187 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
188 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
189 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
190 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
191 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
192 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
193 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
194 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
195 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
196 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
197 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
198 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
199 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
200 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
201 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
202 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
203 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
204 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
205 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
Peter Sanfordf98a7aa2015-06-25 17:40:05 -0700206 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
Renato Caldas791b7d72012-01-06 15:20:51 +0000207 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100208 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
209 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
Craig Shelley541e05e2010-08-23 20:50:57 +0100210 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
Craig Shelley39a66b82005-05-27 00:09:56 +0100211 { } /* Terminating Entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212};
213
Alan Coxff7eb602008-07-22 11:10:17 +0100214MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500216struct cp210x_port_private {
Preston Ficka5360a52012-02-24 13:42:39 -0600217 __u8 bInterfaceNumber;
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500218 bool has_swapped_line_ctl;
Preston Ficka5360a52012-02-24 13:42:39 -0600219};
220
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100221static struct usb_serial_driver cp210x_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700222 .driver = {
223 .owner = THIS_MODULE,
Johan Hovold4f2ab882012-10-29 10:56:19 +0100224 .name = "cp210x",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700225 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 .num_ports = 1,
Johan Hovoldaea006b2010-03-17 23:00:39 +0100228 .bulk_in_size = 256,
Johan Hovoldd4e598f2010-03-17 23:00:38 +0100229 .bulk_out_size = 256,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100230 .open = cp210x_open,
231 .close = cp210x_close,
232 .break_ctl = cp210x_break_ctl,
233 .set_termios = cp210x_set_termios,
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -0600234 .tx_empty = cp210x_tx_empty,
Johan Hovold4f2ab882012-10-29 10:56:19 +0100235 .tiocmget = cp210x_tiocmget,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100236 .tiocmset = cp210x_tiocmset,
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500237 .port_probe = cp210x_port_probe,
238 .port_remove = cp210x_port_remove,
Libor Pechacekd14fc1a2011-01-14 14:30:21 +0100239 .dtr_rts = cp210x_dtr_rts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240};
241
Alan Stern08a4f6b2012-02-23 14:56:17 -0500242static struct usb_serial_driver * const serial_drivers[] = {
243 &cp210x_device, NULL
244};
245
Craig Shelley39a66b82005-05-27 00:09:56 +0100246/* Config request types */
Preston Fick32445602012-04-30 23:06:48 -0500247#define REQTYPE_HOST_TO_INTERFACE 0x41
248#define REQTYPE_INTERFACE_TO_HOST 0xc1
249#define REQTYPE_HOST_TO_DEVICE 0x40
250#define REQTYPE_DEVICE_TO_HOST 0xc0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Craig Shelley93ef1f12009-06-11 13:53:30 +0100252/* Config request codes */
253#define CP210X_IFC_ENABLE 0x00
254#define CP210X_SET_BAUDDIV 0x01
255#define CP210X_GET_BAUDDIV 0x02
256#define CP210X_SET_LINE_CTL 0x03
257#define CP210X_GET_LINE_CTL 0x04
258#define CP210X_SET_BREAK 0x05
259#define CP210X_IMM_CHAR 0x06
260#define CP210X_SET_MHS 0x07
261#define CP210X_GET_MDMSTS 0x08
262#define CP210X_SET_XON 0x09
263#define CP210X_SET_XOFF 0x0A
264#define CP210X_SET_EVENTMASK 0x0B
265#define CP210X_GET_EVENTMASK 0x0C
266#define CP210X_SET_CHAR 0x0D
267#define CP210X_GET_CHARS 0x0E
268#define CP210X_GET_PROPS 0x0F
269#define CP210X_GET_COMM_STATUS 0x10
270#define CP210X_RESET 0x11
271#define CP210X_PURGE 0x12
272#define CP210X_SET_FLOW 0x13
273#define CP210X_GET_FLOW 0x14
274#define CP210X_EMBED_EVENTS 0x15
275#define CP210X_GET_EVENTSTATE 0x16
276#define CP210X_SET_CHARS 0x19
Preston Fick7f482fc2012-01-16 18:14:09 -0600277#define CP210X_GET_BAUDRATE 0x1D
278#define CP210X_SET_BAUDRATE 0x1E
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Craig Shelley93ef1f12009-06-11 13:53:30 +0100280/* CP210X_IFC_ENABLE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281#define UART_ENABLE 0x0001
282#define UART_DISABLE 0x0000
283
Craig Shelley93ef1f12009-06-11 13:53:30 +0100284/* CP210X_(SET|GET)_BAUDDIV */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285#define BAUD_RATE_GEN_FREQ 0x384000
286
Craig Shelley93ef1f12009-06-11 13:53:30 +0100287/* CP210X_(SET|GET)_LINE_CTL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288#define BITS_DATA_MASK 0X0f00
Craig Shelley39a66b82005-05-27 00:09:56 +0100289#define BITS_DATA_5 0X0500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290#define BITS_DATA_6 0X0600
291#define BITS_DATA_7 0X0700
292#define BITS_DATA_8 0X0800
293#define BITS_DATA_9 0X0900
294
295#define BITS_PARITY_MASK 0x00f0
296#define BITS_PARITY_NONE 0x0000
297#define BITS_PARITY_ODD 0x0010
298#define BITS_PARITY_EVEN 0x0020
299#define BITS_PARITY_MARK 0x0030
300#define BITS_PARITY_SPACE 0x0040
301
302#define BITS_STOP_MASK 0x000f
303#define BITS_STOP_1 0x0000
304#define BITS_STOP_1_5 0x0001
305#define BITS_STOP_2 0x0002
Craig Shelley39a66b82005-05-27 00:09:56 +0100306
Craig Shelley93ef1f12009-06-11 13:53:30 +0100307/* CP210X_SET_BREAK */
Craig Shelley72916792010-08-18 22:13:39 +0100308#define BREAK_ON 0x0001
309#define BREAK_OFF 0x0000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Craig Shelley93ef1f12009-06-11 13:53:30 +0100311/* CP210X_(SET_MHS|GET_MDMSTS) */
Craig Shelley39a66b82005-05-27 00:09:56 +0100312#define CONTROL_DTR 0x0001
313#define CONTROL_RTS 0x0002
314#define CONTROL_CTS 0x0010
315#define CONTROL_DSR 0x0020
316#define CONTROL_RING 0x0040
317#define CONTROL_DCD 0x0080
318#define CONTROL_WRITE_DTR 0x0100
319#define CONTROL_WRITE_RTS 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -0600321/* CP210X_GET_COMM_STATUS returns these 0x13 bytes */
322struct cp210x_comm_status {
323 __le32 ulErrors;
324 __le32 ulHoldReasons;
325 __le32 ulAmountInInQueue;
326 __le32 ulAmountInOutQueue;
327 u8 bEofReceived;
328 u8 bWaitForImmediate;
329 u8 bReserved;
330} __packed;
331
Craig Shelley39a66b82005-05-27 00:09:56 +0100332/*
Konstantin Shkolnyyebfb3192015-10-28 16:02:03 -0500333 * CP210X_PURGE - 16 bits passed in wValue of USB request.
334 * SiLabs app note AN571 gives a strange description of the 4 bits:
335 * bit 0 or bit 2 clears the transmit queue and 1 or 3 receive.
336 * writing 1 to all, however, purges cp2108 well enough to avoid the hang.
337 */
338#define PURGE_ALL 0x000f
339
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500340/* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */
341struct cp210x_flow_ctl {
342 __le32 ulControlHandshake;
343 __le32 ulFlowReplace;
344 __le32 ulXonLimit;
345 __le32 ulXoffLimit;
346} __packed;
347
348/* cp210x_flow_ctl::ulControlHandshake */
349#define CP210X_SERIAL_DTR_MASK GENMASK(1, 0)
350#define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode)
351#define CP210X_SERIAL_CTS_HANDSHAKE BIT(3)
352#define CP210X_SERIAL_DSR_HANDSHAKE BIT(4)
353#define CP210X_SERIAL_DCD_HANDSHAKE BIT(5)
354#define CP210X_SERIAL_DSR_SENSITIVITY BIT(6)
355
356/* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */
357#define CP210X_SERIAL_DTR_INACTIVE 0
358#define CP210X_SERIAL_DTR_ACTIVE 1
359#define CP210X_SERIAL_DTR_FLOW_CTL 2
360
361/* cp210x_flow_ctl::ulFlowReplace */
362#define CP210X_SERIAL_AUTO_TRANSMIT BIT(0)
363#define CP210X_SERIAL_AUTO_RECEIVE BIT(1)
364#define CP210X_SERIAL_ERROR_CHAR BIT(2)
365#define CP210X_SERIAL_NULL_STRIPPING BIT(3)
366#define CP210X_SERIAL_BREAK_CHAR BIT(4)
367#define CP210X_SERIAL_RTS_MASK GENMASK(7, 6)
368#define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6)
369#define CP210X_SERIAL_XOFF_CONTINUE BIT(31)
370
371/* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */
372#define CP210X_SERIAL_RTS_INACTIVE 0
373#define CP210X_SERIAL_RTS_ACTIVE 1
374#define CP210X_SERIAL_RTS_FLOW_CTL 2
375
Craig Shelley39a66b82005-05-27 00:09:56 +0100376/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600377 * Reads a variable-sized block of CP210X_ registers, identified by req.
378 * Returns data into buf in native USB byte order.
Craig Shelley39a66b82005-05-27 00:09:56 +0100379 */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600380static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req,
381 void *buf, int bufsize)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382{
383 struct usb_serial *serial = port->serial;
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500384 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600385 void *dmabuf;
386 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600388 dmabuf = kmalloc(bufsize, GFP_KERNEL);
389 if (!dmabuf) {
390 /*
391 * FIXME Some callers don't bother to check for error,
392 * at least give them consistent junk until they are fixed
393 */
394 memset(buf, 0, bufsize);
Craig Shelley39a66b82005-05-27 00:09:56 +0100395 return -ENOMEM;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600396 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100397
Alan Coxff7eb602008-07-22 11:10:17 +0100398 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600399 req, REQTYPE_INTERFACE_TO_HOST, 0,
400 port_priv->bInterfaceNumber, dmabuf, bufsize,
401 USB_CTRL_SET_TIMEOUT);
402 if (result == bufsize) {
403 memcpy(buf, dmabuf, bufsize);
404 result = 0;
405 } else {
406 dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n",
407 req, bufsize, result);
408 if (result >= 0)
Johan Hovold2479e2a2011-11-10 14:58:29 +0100409 result = -EPROTO;
410
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600411 /*
412 * FIXME Some callers don't bother to check for error,
413 * at least give them consistent junk until they are fixed
414 */
415 memset(buf, 0, bufsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 }
417
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600418 kfree(dmabuf);
419
420 return result;
421}
422
423/*
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600424 * Reads any 32-bit CP210X_ register identified by req.
425 */
426static int cp210x_read_u32_reg(struct usb_serial_port *port, u8 req, u32 *val)
427{
428 __le32 le32_val;
429 int err;
430
431 err = cp210x_read_reg_block(port, req, &le32_val, sizeof(le32_val));
432 if (err) {
433 /*
434 * FIXME Some callers don't bother to check for error,
435 * at least give them consistent junk until they are fixed
436 */
437 *val = 0;
438 return err;
439 }
440
441 *val = le32_to_cpu(le32_val);
442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 return 0;
444}
445
Craig Shelley39a66b82005-05-27 00:09:56 +0100446/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600447 * Reads any 16-bit CP210X_ register identified by req.
Craig Shelley39a66b82005-05-27 00:09:56 +0100448 */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600449static int cp210x_read_u16_reg(struct usb_serial_port *port, u8 req, u16 *val)
450{
451 __le16 le16_val;
452 int err;
453
454 err = cp210x_read_reg_block(port, req, &le16_val, sizeof(le16_val));
455 if (err)
456 return err;
457
458 *val = le16_to_cpu(le16_val);
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600459
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600460 return 0;
461}
462
463/*
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600464 * Reads any 8-bit CP210X_ register identified by req.
465 */
466static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val)
467{
468 return cp210x_read_reg_block(port, req, val, sizeof(*val));
469}
470
471/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600472 * Writes any 16-bit CP210X_ register (req) whose value is passed
473 * entirely in the wValue field of the USB request.
474 */
475static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val)
Craig Shelley39a66b82005-05-27 00:09:56 +0100476{
477 struct usb_serial *serial = port->serial;
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500478 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600479 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100480
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600481 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
482 req, REQTYPE_HOST_TO_INTERFACE, val,
483 port_priv->bInterfaceNumber, NULL, 0,
484 USB_CTRL_SET_TIMEOUT);
485 if (result < 0) {
486 dev_err(&port->dev, "failed set request 0x%x status: %d\n",
487 req, result);
Craig Shelley39a66b82005-05-27 00:09:56 +0100488 }
489
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600490 return result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100491}
492
493/*
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600494 * Writes a variable-sized block of CP210X_ registers, identified by req.
495 * Data in buf must be in native USB byte order.
Craig Shelley39a66b82005-05-27 00:09:56 +0100496 */
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600497static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
498 void *buf, int bufsize)
Craig Shelley39a66b82005-05-27 00:09:56 +0100499{
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600500 struct usb_serial *serial = port->serial;
501 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
502 void *dmabuf;
503 int result;
504
Muhammad Falak R Wanid6c4dc32016-05-19 19:34:36 +0530505 dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600506 if (!dmabuf)
507 return -ENOMEM;
508
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600509 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
510 req, REQTYPE_HOST_TO_INTERFACE, 0,
511 port_priv->bInterfaceNumber, dmabuf, bufsize,
512 USB_CTRL_SET_TIMEOUT);
513
514 kfree(dmabuf);
515
516 if (result == bufsize) {
517 result = 0;
518 } else {
519 dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n",
520 req, bufsize, result);
521 if (result >= 0)
522 result = -EPROTO;
523 }
524
525 return result;
526}
527
528/*
529 * Writes any 32-bit CP210X_ register identified by req.
530 */
531static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val)
532{
533 __le32 le32_val;
534
535 le32_val = cpu_to_le32(val);
536
537 return cp210x_write_reg_block(port, req, &le32_val, sizeof(le32_val));
Craig Shelley39a66b82005-05-27 00:09:56 +0100538}
539
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000540/*
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500541 * Detect CP2108 GET_LINE_CTL bug and activate workaround.
542 * Write a known good value 0x800, read it back.
543 * If it comes back swapped the bug is detected.
544 * Preserve the original register value.
545 */
546static int cp210x_detect_swapped_line_ctl(struct usb_serial_port *port)
547{
548 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600549 u16 line_ctl_save;
550 u16 line_ctl_test;
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500551 int err;
552
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600553 err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_save);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500554 if (err)
555 return err;
556
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600557 err = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, 0x800);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500558 if (err)
559 return err;
560
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600561 err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_test);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500562 if (err)
563 return err;
564
565 if (line_ctl_test == 8) {
566 port_priv->has_swapped_line_ctl = true;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600567 line_ctl_save = swab16(line_ctl_save);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500568 }
569
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600570 return cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, line_ctl_save);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500571}
572
573/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600574 * Must always be called instead of cp210x_read_u16_reg(CP210X_GET_LINE_CTL)
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500575 * to workaround cp2108 bug and get correct value.
576 */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600577static int cp210x_get_line_ctl(struct usb_serial_port *port, u16 *ctl)
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500578{
579 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
580 int err;
581
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600582 err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, ctl);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500583 if (err)
584 return err;
585
586 /* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */
587 if (port_priv->has_swapped_line_ctl)
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600588 *ctl = swab16(*ctl);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500589
590 return 0;
591}
592
593/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100594 * cp210x_quantise_baudrate
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000595 * Quantises the baud rate as per AN205 Table 1
596 */
Johan Hovold4f2ab882012-10-29 10:56:19 +0100597static unsigned int cp210x_quantise_baudrate(unsigned int baud)
598{
Johan Hovoldbe125d92012-01-16 00:36:50 +0100599 if (baud <= 300)
600 baud = 300;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000601 else if (baud <= 600) baud = 600;
602 else if (baud <= 1200) baud = 1200;
603 else if (baud <= 1800) baud = 1800;
604 else if (baud <= 2400) baud = 2400;
605 else if (baud <= 4000) baud = 4000;
606 else if (baud <= 4803) baud = 4800;
607 else if (baud <= 7207) baud = 7200;
608 else if (baud <= 9612) baud = 9600;
609 else if (baud <= 14428) baud = 14400;
610 else if (baud <= 16062) baud = 16000;
611 else if (baud <= 19250) baud = 19200;
612 else if (baud <= 28912) baud = 28800;
613 else if (baud <= 38601) baud = 38400;
614 else if (baud <= 51558) baud = 51200;
615 else if (baud <= 56280) baud = 56000;
616 else if (baud <= 58053) baud = 57600;
617 else if (baud <= 64111) baud = 64000;
618 else if (baud <= 77608) baud = 76800;
619 else if (baud <= 117028) baud = 115200;
620 else if (baud <= 129347) baud = 128000;
621 else if (baud <= 156868) baud = 153600;
622 else if (baud <= 237832) baud = 230400;
623 else if (baud <= 254234) baud = 250000;
624 else if (baud <= 273066) baud = 256000;
625 else if (baud <= 491520) baud = 460800;
626 else if (baud <= 567138) baud = 500000;
627 else if (baud <= 670254) baud = 576000;
Johan Hovoldd1620ca2012-01-16 00:36:53 +0100628 else if (baud < 1000000)
629 baud = 921600;
630 else if (baud > 2000000)
631 baud = 2000000;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000632 return baud;
633}
634
Alan Coxa509a7e2009-09-19 13:13:26 -0700635static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 int result;
638
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600639 result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100640 if (result) {
641 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
642 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 }
644
Craig Shelley39a66b82005-05-27 00:09:56 +0100645 /* Configure the termios structure */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100646 cp210x_get_termios(tty, port);
Johan Hovold55b2afb2012-01-16 00:36:48 +0100647
Johan Hovoldcdc32fd2012-01-16 00:36:52 +0100648 /* The baud rate must be initialised on cp2104 */
649 if (tty)
650 cp210x_change_speed(tty, port, NULL);
651
Johan Hovold55b2afb2012-01-16 00:36:48 +0100652 return usb_serial_generic_open(tty, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653}
654
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100655static void cp210x_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656{
Johan Hovoldf26788d2010-03-17 23:00:45 +0100657 usb_serial_generic_close(port);
Konstantin Shkolnyyebfb3192015-10-28 16:02:03 -0500658
659 /* Clear both queues; cp2108 needs this to avoid an occasional hang */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600660 cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL);
Konstantin Shkolnyyebfb3192015-10-28 16:02:03 -0500661
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600662 cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663}
664
Craig Shelley39a66b82005-05-27 00:09:56 +0100665/*
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -0600666 * Read how many bytes are waiting in the TX queue.
667 */
668static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port,
669 u32 *count)
670{
671 struct usb_serial *serial = port->serial;
672 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
673 struct cp210x_comm_status *sts;
674 int result;
675
676 sts = kmalloc(sizeof(*sts), GFP_KERNEL);
677 if (!sts)
678 return -ENOMEM;
679
680 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
681 CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST,
682 0, port_priv->bInterfaceNumber, sts, sizeof(*sts),
683 USB_CTRL_GET_TIMEOUT);
684 if (result == sizeof(*sts)) {
685 *count = le32_to_cpu(sts->ulAmountInOutQueue);
686 result = 0;
687 } else {
688 dev_err(&port->dev, "failed to get comm status: %d\n", result);
689 if (result >= 0)
690 result = -EPROTO;
691 }
692
693 kfree(sts);
694
695 return result;
696}
697
698static bool cp210x_tx_empty(struct usb_serial_port *port)
699{
700 int err;
701 u32 count;
702
703 err = cp210x_get_tx_queue_byte_count(port, &count);
704 if (err)
705 return true;
706
707 return !count;
708}
709
710/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100711 * cp210x_get_termios
Craig Shelley39a66b82005-05-27 00:09:56 +0100712 * Reads the baud rate, data bits, parity, stop bits and flow control mode
713 * from the device, corrects any unsupported values, and configures the
714 * termios structure to reflect the state of the device
715 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100716static void cp210x_get_termios(struct tty_struct *tty,
VomLehnd2ad67b2009-03-12 14:37:42 -0700717 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718{
VomLehnd2ad67b2009-03-12 14:37:42 -0700719 unsigned int baud;
720
721 if (tty) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100722 cp210x_get_termios_port(tty->driver_data,
Alan Coxadc8d742012-07-14 15:31:47 +0100723 &tty->termios.c_cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700724 tty_encode_baud_rate(tty, baud, baud);
Johan Hovold4f2ab882012-10-29 10:56:19 +0100725 } else {
VomLehnd2ad67b2009-03-12 14:37:42 -0700726 unsigned int cflag;
727 cflag = 0;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100728 cp210x_get_termios_port(port, &cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700729 }
730}
731
732/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100733 * cp210x_get_termios_port
734 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
VomLehnd2ad67b2009-03-12 14:37:42 -0700735 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100736static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700737 unsigned int *cflagp, unsigned int *baudp)
738{
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700739 struct device *dev = &port->dev;
Konstantin Shkolnyy7084fa82016-02-28 15:51:56 -0600740 unsigned int cflag;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500741 struct cp210x_flow_ctl flow_ctl;
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600742 u32 baud;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600743 u16 bits;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500744 u32 ctl_hs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600746 cp210x_read_u32_reg(port, CP210X_GET_BAUDRATE, &baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700748 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700749 *baudp = baud;
Alan Cox9ab0f202007-10-18 01:24:24 -0700750
VomLehnd2ad67b2009-03-12 14:37:42 -0700751 cflag = *cflagp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500753 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 cflag &= ~CSIZE;
Alan Coxff7eb602008-07-22 11:10:17 +0100755 switch (bits & BITS_DATA_MASK) {
756 case BITS_DATA_5:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700757 dev_dbg(dev, "%s - data bits = 5\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100758 cflag |= CS5;
759 break;
760 case BITS_DATA_6:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700761 dev_dbg(dev, "%s - data bits = 6\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100762 cflag |= CS6;
763 break;
764 case BITS_DATA_7:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700765 dev_dbg(dev, "%s - data bits = 7\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100766 cflag |= CS7;
767 break;
768 case BITS_DATA_8:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700769 dev_dbg(dev, "%s - data bits = 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100770 cflag |= CS8;
771 break;
772 case BITS_DATA_9:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700773 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100774 cflag |= CS8;
775 bits &= ~BITS_DATA_MASK;
776 bits |= BITS_DATA_8;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600777 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100778 break;
779 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700780 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100781 cflag |= CS8;
782 bits &= ~BITS_DATA_MASK;
783 bits |= BITS_DATA_8;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600784 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100785 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 }
787
Alan Coxff7eb602008-07-22 11:10:17 +0100788 switch (bits & BITS_PARITY_MASK) {
789 case BITS_PARITY_NONE:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700790 dev_dbg(dev, "%s - parity = NONE\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100791 cflag &= ~PARENB;
792 break;
793 case BITS_PARITY_ODD:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700794 dev_dbg(dev, "%s - parity = ODD\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100795 cflag |= (PARENB|PARODD);
796 break;
797 case BITS_PARITY_EVEN:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700798 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100799 cflag &= ~PARODD;
800 cflag |= PARENB;
801 break;
802 case BITS_PARITY_MARK:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700803 dev_dbg(dev, "%s - parity = MARK\n", __func__);
Roland Koebler4b6181c2011-11-09 19:37:08 +0100804 cflag |= (PARENB|PARODD|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100805 break;
806 case BITS_PARITY_SPACE:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700807 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
Roland Koebler4b6181c2011-11-09 19:37:08 +0100808 cflag &= ~PARODD;
809 cflag |= (PARENB|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100810 break;
811 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700812 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100813 cflag &= ~PARENB;
814 bits &= ~BITS_PARITY_MASK;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600815 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100816 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 }
818
819 cflag &= ~CSTOPB;
Alan Coxff7eb602008-07-22 11:10:17 +0100820 switch (bits & BITS_STOP_MASK) {
821 case BITS_STOP_1:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700822 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100823 break;
824 case BITS_STOP_1_5:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700825 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100826 bits &= ~BITS_STOP_MASK;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600827 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100828 break;
829 case BITS_STOP_2:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700830 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100831 cflag |= CSTOPB;
832 break;
833 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700834 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100835 bits &= ~BITS_STOP_MASK;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600836 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100837 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 }
839
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500840 cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
841 sizeof(flow_ctl));
842 ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
843 if (ctl_hs & CP210X_SERIAL_CTS_HANDSHAKE) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700844 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100845 cflag |= CRTSCTS;
846 } else {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700847 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100848 cflag &= ~CRTSCTS;
849 }
850
VomLehnd2ad67b2009-03-12 14:37:42 -0700851 *cflagp = cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852}
853
Johan Hovolde5990872012-01-16 00:36:51 +0100854/*
855 * CP2101 supports the following baud rates:
856 *
857 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
858 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
859 *
860 * CP2102 and CP2103 support the following additional rates:
861 *
862 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
863 * 576000
864 *
865 * The device will map a requested rate to a supported one, but the result
866 * of requests for rates greater than 1053257 is undefined (see AN205).
867 *
868 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
869 * respectively, with an error less than 1%. The actual rates are determined
870 * by
871 *
872 * div = round(freq / (2 x prescale x request))
873 * actual = freq / (2 x prescale x div)
874 *
875 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
876 * or 1 otherwise.
877 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
878 * otherwise.
879 */
880static void cp210x_change_speed(struct tty_struct *tty,
881 struct usb_serial_port *port, struct ktermios *old_termios)
882{
883 u32 baud;
884
Alan Coxadc8d742012-07-14 15:31:47 +0100885 baud = tty->termios.c_ospeed;
Johan Hovolde5990872012-01-16 00:36:51 +0100886
Johan Hovoldd1620ca2012-01-16 00:36:53 +0100887 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
888 * or to an arbitrary rate in [1M,2M].
Johan Hovolde5990872012-01-16 00:36:51 +0100889 *
890 * NOTE: B0 is not implemented.
891 */
892 baud = cp210x_quantise_baudrate(baud);
893
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700894 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600895 if (cp210x_write_u32_reg(port, CP210X_SET_BAUDRATE, baud)) {
Johan Hovolde5990872012-01-16 00:36:51 +0100896 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
897 if (old_termios)
898 baud = old_termios->c_ospeed;
899 else
900 baud = 9600;
901 }
902
903 tty_encode_baud_rate(tty, baud, baud);
904}
905
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100906static void cp210x_set_termios(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100907 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908{
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700909 struct device *dev = &port->dev;
Alan Cox9ab0f202007-10-18 01:24:24 -0700910 unsigned int cflag, old_cflag;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600911 u16 bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Alan Coxadc8d742012-07-14 15:31:47 +0100913 cflag = tty->termios.c_cflag;
Alan Cox01e96d22007-07-26 18:54:12 +0100914 old_cflag = old_termios->c_cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Alan Coxadc8d742012-07-14 15:31:47 +0100916 if (tty->termios.c_ospeed != old_termios->c_ospeed)
Johan Hovolde5990872012-01-16 00:36:51 +0100917 cp210x_change_speed(tty, port, old_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Craig Shelley39a66b82005-05-27 00:09:56 +0100919 /* If the number of data bits is to be updated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500921 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 bits &= ~BITS_DATA_MASK;
923 switch (cflag & CSIZE) {
Alan Coxff7eb602008-07-22 11:10:17 +0100924 case CS5:
925 bits |= BITS_DATA_5;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700926 dev_dbg(dev, "%s - data bits = 5\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100927 break;
928 case CS6:
929 bits |= BITS_DATA_6;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700930 dev_dbg(dev, "%s - data bits = 6\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100931 break;
932 case CS7:
933 bits |= BITS_DATA_7;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700934 dev_dbg(dev, "%s - data bits = 7\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100935 break;
936 case CS8:
937 bits |= BITS_DATA_8;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700938 dev_dbg(dev, "%s - data bits = 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100939 break;
940 /*case CS9:
941 bits |= BITS_DATA_9;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700942 dev_dbg(dev, "%s - data bits = 9\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100943 break;*/
944 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700945 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 +0100946 bits |= BITS_DATA_8;
947 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 }
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600949 if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700950 dev_dbg(dev, "Number of data bits requested not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 }
952
Roland Koebler4b6181c2011-11-09 19:37:08 +0100953 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
954 (old_cflag & (PARENB|PARODD|CMSPAR))) {
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500955 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 bits &= ~BITS_PARITY_MASK;
957 if (cflag & PARENB) {
Roland Koebler4b6181c2011-11-09 19:37:08 +0100958 if (cflag & CMSPAR) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700959 if (cflag & PARODD) {
960 bits |= BITS_PARITY_MARK;
961 dev_dbg(dev, "%s - parity = MARK\n", __func__);
962 } else {
963 bits |= BITS_PARITY_SPACE;
964 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
965 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 } else {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700967 if (cflag & PARODD) {
968 bits |= BITS_PARITY_ODD;
969 dev_dbg(dev, "%s - parity = ODD\n", __func__);
970 } else {
971 bits |= BITS_PARITY_EVEN;
972 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
973 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 }
975 }
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600976 if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700977 dev_dbg(dev, "Parity mode not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 }
979
980 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500981 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 bits &= ~BITS_STOP_MASK;
983 if (cflag & CSTOPB) {
984 bits |= BITS_STOP_2;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700985 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 } else {
987 bits |= BITS_STOP_1;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700988 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 }
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600990 if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700991 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100993
994 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500995 struct cp210x_flow_ctl flow_ctl;
996 u32 ctl_hs;
997 u32 flow_repl;
Konstantin Shkolnyy7084fa82016-02-28 15:51:56 -0600998
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500999 cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
1000 sizeof(flow_ctl));
1001 ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
1002 flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace);
1003 dev_dbg(dev, "%s - read ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
1004 __func__, ctl_hs, flow_repl);
Konstantin Shkolnyy7084fa82016-02-28 15:51:56 -06001005
Konstantin Shkolnyyab5701a2016-05-04 16:57:11 -05001006 ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE;
1007 ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE;
1008 ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY;
1009 ctl_hs &= ~CP210X_SERIAL_DTR_MASK;
1010 ctl_hs |= CP210X_SERIAL_DTR_SHIFT(CP210X_SERIAL_DTR_ACTIVE);
Craig Shelley39a66b82005-05-27 00:09:56 +01001011 if (cflag & CRTSCTS) {
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001012 ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE;
Konstantin Shkolnyyab5701a2016-05-04 16:57:11 -05001013
1014 flow_repl &= ~CP210X_SERIAL_RTS_MASK;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001015 flow_repl |= CP210X_SERIAL_RTS_SHIFT(
1016 CP210X_SERIAL_RTS_FLOW_CTL);
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001017 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +01001018 } else {
Konstantin Shkolnyyab5701a2016-05-04 16:57:11 -05001019 ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
1020
1021 flow_repl &= ~CP210X_SERIAL_RTS_MASK;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001022 flow_repl |= CP210X_SERIAL_RTS_SHIFT(
1023 CP210X_SERIAL_RTS_ACTIVE);
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001024 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +01001025 }
1026
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001027 dev_dbg(dev, "%s - write ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
1028 __func__, ctl_hs, flow_repl);
1029 flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs);
1030 flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
1031 cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
1032 sizeof(flow_ctl));
Craig Shelley39a66b82005-05-27 00:09:56 +01001033 }
1034
1035}
1036
Johan Hovold4f2ab882012-10-29 10:56:19 +01001037static int cp210x_tiocmset(struct tty_struct *tty,
Craig Shelley39a66b82005-05-27 00:09:56 +01001038 unsigned int set, unsigned int clear)
1039{
Alan Cox95da3102008-07-22 11:09:07 +01001040 struct usb_serial_port *port = tty->driver_data;
Alan Cox20b9d172011-02-14 16:26:50 +00001041 return cp210x_tiocmset_port(port, set, clear);
VomLehnd2ad67b2009-03-12 14:37:42 -07001042}
1043
Alan Cox20b9d172011-02-14 16:26:50 +00001044static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -07001045 unsigned int set, unsigned int clear)
1046{
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001047 u16 control = 0;
Craig Shelley39a66b82005-05-27 00:09:56 +01001048
Craig Shelley39a66b82005-05-27 00:09:56 +01001049 if (set & TIOCM_RTS) {
1050 control |= CONTROL_RTS;
1051 control |= CONTROL_WRITE_RTS;
1052 }
1053 if (set & TIOCM_DTR) {
1054 control |= CONTROL_DTR;
1055 control |= CONTROL_WRITE_DTR;
1056 }
1057 if (clear & TIOCM_RTS) {
1058 control &= ~CONTROL_RTS;
1059 control |= CONTROL_WRITE_RTS;
1060 }
1061 if (clear & TIOCM_DTR) {
1062 control &= ~CONTROL_DTR;
1063 control |= CONTROL_WRITE_DTR;
1064 }
1065
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001066 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +01001067
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001068 return cp210x_write_u16_reg(port, CP210X_SET_MHS, control);
Craig Shelley39a66b82005-05-27 00:09:56 +01001069}
1070
Alan Coxd94c7bd2009-10-28 21:12:33 +01001071static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
1072{
1073 if (on)
Alan Cox20b9d172011-02-14 16:26:50 +00001074 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
Alan Coxd94c7bd2009-10-28 21:12:33 +01001075 else
Alan Cox20b9d172011-02-14 16:26:50 +00001076 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
Alan Coxd94c7bd2009-10-28 21:12:33 +01001077}
1078
Johan Hovold4f2ab882012-10-29 10:56:19 +01001079static int cp210x_tiocmget(struct tty_struct *tty)
Craig Shelley39a66b82005-05-27 00:09:56 +01001080{
Alan Cox95da3102008-07-22 11:09:07 +01001081 struct usb_serial_port *port = tty->driver_data;
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -06001082 u8 control;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -07001083 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +01001084
Johan Hovoldde24e0a2016-10-19 15:45:07 +02001085 result = cp210x_read_u8_reg(port, CP210X_GET_MDMSTS, &control);
1086 if (result)
1087 return result;
Craig Shelley39a66b82005-05-27 00:09:56 +01001088
1089 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
1090 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
1091 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
1092 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
1093 |((control & CONTROL_RING)? TIOCM_RI : 0)
1094 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
1095
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001096 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +01001097
1098 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099}
1100
Johan Hovold4f2ab882012-10-29 10:56:19 +01001101static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102{
Alan Cox95da3102008-07-22 11:09:07 +01001103 struct usb_serial_port *port = tty->driver_data;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001104 u16 state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 if (break_state == 0)
1107 state = BREAK_OFF;
1108 else
1109 state = BREAK_ON;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001110 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
1111 state == BREAK_OFF ? "off" : "on");
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001112 cp210x_write_u16_reg(port, CP210X_SET_BREAK, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113}
1114
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001115static int cp210x_port_probe(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116{
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001117 struct usb_serial *serial = port->serial;
Johan Hovold4295fe72012-10-15 15:47:20 +02001118 struct usb_host_interface *cur_altsetting;
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001119 struct cp210x_port_private *port_priv;
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -05001120 int ret;
Preston Ficka5360a52012-02-24 13:42:39 -06001121
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001122 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
1123 if (!port_priv)
Johan Hovold4295fe72012-10-15 15:47:20 +02001124 return -ENOMEM;
Preston Ficka5360a52012-02-24 13:42:39 -06001125
Johan Hovold4295fe72012-10-15 15:47:20 +02001126 cur_altsetting = serial->interface->cur_altsetting;
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001127 port_priv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
Preston Ficka5360a52012-02-24 13:42:39 -06001128
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001129 usb_set_serial_port_data(port, port_priv);
Preston Ficka5360a52012-02-24 13:42:39 -06001130
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -05001131 ret = cp210x_detect_swapped_line_ctl(port);
1132 if (ret) {
1133 kfree(port_priv);
1134 return ret;
1135 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
1137 return 0;
1138}
1139
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001140static int cp210x_port_remove(struct usb_serial_port *port)
Preston Ficka5360a52012-02-24 13:42:39 -06001141{
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001142 struct cp210x_port_private *port_priv;
Preston Ficka5360a52012-02-24 13:42:39 -06001143
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001144 port_priv = usb_get_serial_port_data(port);
1145 kfree(port_priv);
1146
1147 return 0;
Preston Ficka5360a52012-02-24 13:42:39 -06001148}
1149
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -07001150module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153MODULE_LICENSE("GPL");