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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>
Martyn Welchcf5276c2016-10-20 15:13:54 +010026#include <linux/gpio/driver.h>
27#include <linux/bitops.h>
28#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
Craig Shelley4cc27bd2009-06-11 13:54:40 +010030#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
32/*
33 * Function Prototypes
34 */
Alan Coxa509a7e2009-09-19 13:13:26 -070035static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010036static void cp210x_close(struct usb_serial_port *);
Johan Hovold4f2ab882012-10-29 10:56:19 +010037static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010038static void cp210x_get_termios_port(struct usb_serial_port *port,
Geert Uytterhoeven009615ab2016-11-21 13:19:31 +010039 tcflag_t *cflagp, unsigned int *baudp);
Johan Hovolde5990872012-01-16 00:36:51 +010040static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
41 struct ktermios *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010042static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
Alan Cox95da3102008-07-22 11:09:07 +010043 struct ktermios*);
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -060044static bool cp210x_tx_empty(struct usb_serial_port *port);
Alan Cox60b33c12011-02-14 16:26:14 +000045static int cp210x_tiocmget(struct tty_struct *);
Alan Cox20b9d172011-02-14 16:26:50 +000046static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
47static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -070048 unsigned int, unsigned int);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010049static void cp210x_break_ctl(struct tty_struct *, int);
Martyn Welchcf5276c2016-10-20 15:13:54 +010050static int cp210x_attach(struct usb_serial *);
51static void cp210x_disconnect(struct usb_serial *);
52static void cp210x_release(struct usb_serial *);
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -050053static int cp210x_port_probe(struct usb_serial_port *);
54static int cp210x_port_remove(struct usb_serial_port *);
Alan Coxd94c7bd2009-10-28 21:12:33 +010055static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Németh Márton7d40d7e2010-01-10 15:34:24 +010057static const struct usb_device_id id_table[] = {
DJ Delorie2f1136d2010-09-17 11:09:06 -040058 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
M Kondrin5091b582008-11-14 13:02:45 +030059 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
Craig Shelley59fba742008-04-12 16:15:54 +010060 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
A E Lawrence5b22a322010-08-29 21:51:52 +010061 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010062 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
Luiz Angelo Daros de Luca90625072013-07-01 23:56:25 -030063 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
Edouard Lafargue1f4f7142007-09-25 10:15:36 +020064 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010065 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
Lennart Sorensena6f03312015-01-21 15:24:27 -050066 { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
Craig Shelleyeefd9022010-05-15 13:36:38 +010067 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
68 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
Craig Shelley198b9512005-08-28 09:51:15 +010069 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
Martin Kusserow014840e2007-12-21 12:02:17 +010070 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
Craig Shelley59fba742008-04-12 16:15:54 +010071 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
Luis Llorente Campo8de7f4d2013-01-31 13:37:05 +010072 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
Craig Shelley198b9512005-08-28 09:51:15 +010073 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000074 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
75 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010076 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
Amit Kucheria0601e112009-07-06 14:19:59 +030077 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
78 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +000079 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
Craig Shelley59224f52006-03-11 11:29:02 +000080 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
Craig Shelleyeefd9022010-05-15 13:36:38 +010081 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
82 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
Craig Shelley92f5cae2007-04-20 14:37:17 +010083 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
Damir N Abdullin9a18e752008-10-30 13:52:38 -070084 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
Vitja Makarov212a4b42006-05-31 00:40:06 +040085 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
Craig Shelleyeefd9022010-05-15 13:36:38 +010086 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000087 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
Mikko Tuumanen5bbfa6f2012-06-01 11:28:55 +030088 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
Craig Shelleye988fc82006-01-20 00:06:19 +000089 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
Craig Shelley92f5cae2007-04-20 14:37:17 +010090 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +000091 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
Craig Shelleyba0f3322008-09-04 21:28:21 +010092 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
Craig Shelleye988fc82006-01-20 00:06:19 +000093 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
Craig Shelley8bf16ba2009-07-12 21:52:33 +010094 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
Jon K Hellanfc4bd642007-02-28 23:04:33 +010095 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
96 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
Steve Conklina57e82a2013-03-07 17:19:33 -060097 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
Jason Detring0bf7a812010-08-26 15:08:54 -050098 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000099 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100100 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100101 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
Robert M. Kenneyc6535662009-02-26 14:58:39 -0500102 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
Bernhard Beck966236972008-05-11 09:23:13 -0700103 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
Malte Schröder08e87d02012-01-05 20:34:40 +0100104 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
Craig Shelley59fba742008-04-12 16:15:54 +0100105 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100106 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200107 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
Peter Dedeckerf487c542016-01-08 12:34:41 +0100108 { USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200109 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
Jeff Long8be27c22007-11-28 11:02:09 -0500110 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
Alan Coxbd07c552010-02-08 10:10:44 +0000111 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100112 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200113 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
Tomasz K877e2622009-01-04 12:47:11 +0100114 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300115 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
Tristan Bruns72b30072014-04-13 23:57:16 +0200116 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
Florian Fainellic851e832011-05-10 11:17:33 +0200117 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
Jasem Mutlaq613ac232016-04-19 10:38:27 +0300118 { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100119 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
Craig Shelleyba0f3322008-09-04 21:28:21 +0100120 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100121 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
Craig Shelley881e3c92008-11-09 20:17:54 +0000122 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000123 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100124 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000125 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
Alex Stephensd23bac92009-03-17 00:06:19 +0000126 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
Kyle Jonesdecc5362016-09-23 13:28:37 -0500127 { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
Craig Shelley541e05e2010-08-23 20:50:57 +0100128 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
Jasem Mutlaq613ac232016-04-19 10:38:27 +0300129 { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000130 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
131 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
Markus Becker356fe442012-11-22 09:41:23 +0100132 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000133 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
134 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
David Peterson1ae78a42015-01-06 15:00:52 +0000135 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
136 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
Sami Rahman76811562013-07-08 14:28:55 -0400137 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
138 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
Joe Savagebfc2d7d2014-09-20 08:01:16 -0500139 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
Paul Jakma2ab13292016-11-16 10:13:49 +0000140 { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
David Peterson1ae78a42015-01-06 15:00:52 +0000141 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
Mark Edwardsc735ed72015-04-14 08:52:34 -0400142 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
John D. Blairdf72d582015-06-04 13:18:19 -0700143 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
Craig Shelleye988fc82006-01-20 00:06:19 +0000144 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
Craig Shelley61926b92006-10-12 22:09:56 +0100145 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
Preston Ficka5360a52012-02-24 13:42:39 -0600146 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100147 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000148 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
149 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
150 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
151 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
Pozsar Balazsebaf4942007-02-16 12:47:49 +0100152 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100153 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
Mike Manning1d377f42016-04-18 12:13:23 +0000154 { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */
155 { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
Johannes Hoelzle05998d2006-12-02 16:54:27 +0100156 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100157 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100158 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
159 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000160 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100161 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
162 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
163 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
164 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
Michiel vd Garde675af702015-02-27 02:08:29 +0100165 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
166 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
Josef Balatkab0ce84d2005-11-17 09:47:24 -0800167 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
Alessio Igor Bogani356c5a42010-07-27 23:05:14 +0200168 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
169 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
170 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
171 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
Bruno Thomsenc6c1e442012-02-21 23:41:37 +0100172 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
173 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
Craig Shelley541e05e2010-08-23 20:50:57 +0100174 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
175 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
176 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
Oliver Freyermuthf7d7f592015-12-28 18:37:38 +0100177 { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
Ken Lin6627ae12016-02-01 14:57:25 -0500178 { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
179 { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
Martyn Welchcddc9432016-03-29 17:47:29 +0100180 { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
Ken Lin9a593652017-02-04 04:00:24 +0800181 { USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
182 { USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
Vittorio Alfieri3c4c6152016-02-28 14:40:24 +0100183 { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
Barry Grusslingb579fa52013-07-19 14:46:12 -0700184 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
Andras Kovacsb9326052014-06-27 14:50:11 +0200185 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
Nathaniel Ting35cc83e2014-10-03 12:01:20 -0400186 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
Anders Larsen93ad03d2010-10-06 23:46:25 +0200187 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
Andreas Bomholtzdee80ad2014-09-22 09:50:43 +0200188 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100189 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
190 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
Matwey V. Kornilovbe3101c2013-03-09 13:57:32 +0400191 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
192 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
193 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
194 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
195 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
196 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
197 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
198 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
199 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
200 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
201 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
202 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
203 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
204 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
205 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
206 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
207 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
208 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
209 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
Peter Sanfordf98a7aa2015-06-25 17:40:05 -0700210 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
Renato Caldas791b7d72012-01-06 15:20:51 +0000211 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
Craig Shelley3fcc8f92012-06-26 23:20:04 +0100212 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
213 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
Craig Shelley541e05e2010-08-23 20:50:57 +0100214 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
Craig Shelley39a66b82005-05-27 00:09:56 +0100215 { } /* Terminating Entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216};
217
Alan Coxff7eb602008-07-22 11:10:17 +0100218MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Martyn Welchcf5276c2016-10-20 15:13:54 +0100220struct cp210x_serial_private {
221#ifdef CONFIG_GPIOLIB
222 struct gpio_chip gc;
223 u8 config;
224 u8 gpio_mode;
Johan Hovold6b7271d22016-10-24 11:58:12 +0200225 bool gpio_registered;
Martyn Welchcf5276c2016-10-20 15:13:54 +0100226#endif
227 u8 partnum;
228};
229
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500230struct cp210x_port_private {
Preston Ficka5360a52012-02-24 13:42:39 -0600231 __u8 bInterfaceNumber;
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500232 bool has_swapped_line_ctl;
Preston Ficka5360a52012-02-24 13:42:39 -0600233};
234
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100235static struct usb_serial_driver cp210x_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700236 .driver = {
237 .owner = THIS_MODULE,
Johan Hovold4f2ab882012-10-29 10:56:19 +0100238 .name = "cp210x",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700239 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 .num_ports = 1,
Johan Hovoldaea006b2010-03-17 23:00:39 +0100242 .bulk_in_size = 256,
Johan Hovoldd4e598f2010-03-17 23:00:38 +0100243 .bulk_out_size = 256,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100244 .open = cp210x_open,
245 .close = cp210x_close,
246 .break_ctl = cp210x_break_ctl,
247 .set_termios = cp210x_set_termios,
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -0600248 .tx_empty = cp210x_tx_empty,
Johan Hovold4f2ab882012-10-29 10:56:19 +0100249 .tiocmget = cp210x_tiocmget,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100250 .tiocmset = cp210x_tiocmset,
Martyn Welchcf5276c2016-10-20 15:13:54 +0100251 .attach = cp210x_attach,
252 .disconnect = cp210x_disconnect,
253 .release = cp210x_release,
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500254 .port_probe = cp210x_port_probe,
255 .port_remove = cp210x_port_remove,
Libor Pechacekd14fc1a2011-01-14 14:30:21 +0100256 .dtr_rts = cp210x_dtr_rts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257};
258
Alan Stern08a4f6b2012-02-23 14:56:17 -0500259static struct usb_serial_driver * const serial_drivers[] = {
260 &cp210x_device, NULL
261};
262
Craig Shelley39a66b82005-05-27 00:09:56 +0100263/* Config request types */
Preston Fick32445602012-04-30 23:06:48 -0500264#define REQTYPE_HOST_TO_INTERFACE 0x41
265#define REQTYPE_INTERFACE_TO_HOST 0xc1
266#define REQTYPE_HOST_TO_DEVICE 0x40
267#define REQTYPE_DEVICE_TO_HOST 0xc0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Craig Shelley93ef1f12009-06-11 13:53:30 +0100269/* Config request codes */
270#define CP210X_IFC_ENABLE 0x00
271#define CP210X_SET_BAUDDIV 0x01
272#define CP210X_GET_BAUDDIV 0x02
273#define CP210X_SET_LINE_CTL 0x03
274#define CP210X_GET_LINE_CTL 0x04
275#define CP210X_SET_BREAK 0x05
276#define CP210X_IMM_CHAR 0x06
277#define CP210X_SET_MHS 0x07
278#define CP210X_GET_MDMSTS 0x08
279#define CP210X_SET_XON 0x09
280#define CP210X_SET_XOFF 0x0A
281#define CP210X_SET_EVENTMASK 0x0B
282#define CP210X_GET_EVENTMASK 0x0C
283#define CP210X_SET_CHAR 0x0D
284#define CP210X_GET_CHARS 0x0E
285#define CP210X_GET_PROPS 0x0F
286#define CP210X_GET_COMM_STATUS 0x10
287#define CP210X_RESET 0x11
288#define CP210X_PURGE 0x12
289#define CP210X_SET_FLOW 0x13
290#define CP210X_GET_FLOW 0x14
291#define CP210X_EMBED_EVENTS 0x15
292#define CP210X_GET_EVENTSTATE 0x16
293#define CP210X_SET_CHARS 0x19
Preston Fick7f482fc2012-01-16 18:14:09 -0600294#define CP210X_GET_BAUDRATE 0x1D
295#define CP210X_SET_BAUDRATE 0x1E
Martyn Welchcf5276c2016-10-20 15:13:54 +0100296#define CP210X_VENDOR_SPECIFIC 0xFF
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
Craig Shelley93ef1f12009-06-11 13:53:30 +0100298/* CP210X_IFC_ENABLE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299#define UART_ENABLE 0x0001
300#define UART_DISABLE 0x0000
301
Craig Shelley93ef1f12009-06-11 13:53:30 +0100302/* CP210X_(SET|GET)_BAUDDIV */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303#define BAUD_RATE_GEN_FREQ 0x384000
304
Craig Shelley93ef1f12009-06-11 13:53:30 +0100305/* CP210X_(SET|GET)_LINE_CTL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306#define BITS_DATA_MASK 0X0f00
Craig Shelley39a66b82005-05-27 00:09:56 +0100307#define BITS_DATA_5 0X0500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308#define BITS_DATA_6 0X0600
309#define BITS_DATA_7 0X0700
310#define BITS_DATA_8 0X0800
311#define BITS_DATA_9 0X0900
312
313#define BITS_PARITY_MASK 0x00f0
314#define BITS_PARITY_NONE 0x0000
315#define BITS_PARITY_ODD 0x0010
316#define BITS_PARITY_EVEN 0x0020
317#define BITS_PARITY_MARK 0x0030
318#define BITS_PARITY_SPACE 0x0040
319
320#define BITS_STOP_MASK 0x000f
321#define BITS_STOP_1 0x0000
322#define BITS_STOP_1_5 0x0001
323#define BITS_STOP_2 0x0002
Craig Shelley39a66b82005-05-27 00:09:56 +0100324
Craig Shelley93ef1f12009-06-11 13:53:30 +0100325/* CP210X_SET_BREAK */
Craig Shelley72916792010-08-18 22:13:39 +0100326#define BREAK_ON 0x0001
327#define BREAK_OFF 0x0000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
Craig Shelley93ef1f12009-06-11 13:53:30 +0100329/* CP210X_(SET_MHS|GET_MDMSTS) */
Craig Shelley39a66b82005-05-27 00:09:56 +0100330#define CONTROL_DTR 0x0001
331#define CONTROL_RTS 0x0002
332#define CONTROL_CTS 0x0010
333#define CONTROL_DSR 0x0020
334#define CONTROL_RING 0x0040
335#define CONTROL_DCD 0x0080
336#define CONTROL_WRITE_DTR 0x0100
337#define CONTROL_WRITE_RTS 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Martyn Welchcf5276c2016-10-20 15:13:54 +0100339/* CP210X_VENDOR_SPECIFIC values */
340#define CP210X_READ_LATCH 0x00C2
341#define CP210X_GET_PARTNUM 0x370B
342#define CP210X_GET_PORTCONFIG 0x370C
343#define CP210X_GET_DEVICEMODE 0x3711
344#define CP210X_WRITE_LATCH 0x37E1
345
346/* Part number definitions */
347#define CP210X_PARTNUM_CP2101 0x01
348#define CP210X_PARTNUM_CP2102 0x02
349#define CP210X_PARTNUM_CP2103 0x03
350#define CP210X_PARTNUM_CP2104 0x04
351#define CP210X_PARTNUM_CP2105 0x05
352#define CP210X_PARTNUM_CP2108 0x08
353
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -0600354/* CP210X_GET_COMM_STATUS returns these 0x13 bytes */
355struct cp210x_comm_status {
356 __le32 ulErrors;
357 __le32 ulHoldReasons;
358 __le32 ulAmountInInQueue;
359 __le32 ulAmountInOutQueue;
360 u8 bEofReceived;
361 u8 bWaitForImmediate;
362 u8 bReserved;
363} __packed;
364
Craig Shelley39a66b82005-05-27 00:09:56 +0100365/*
Konstantin Shkolnyyebfb3192015-10-28 16:02:03 -0500366 * CP210X_PURGE - 16 bits passed in wValue of USB request.
367 * SiLabs app note AN571 gives a strange description of the 4 bits:
368 * bit 0 or bit 2 clears the transmit queue and 1 or 3 receive.
369 * writing 1 to all, however, purges cp2108 well enough to avoid the hang.
370 */
371#define PURGE_ALL 0x000f
372
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500373/* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */
374struct cp210x_flow_ctl {
375 __le32 ulControlHandshake;
376 __le32 ulFlowReplace;
377 __le32 ulXonLimit;
378 __le32 ulXoffLimit;
379} __packed;
380
381/* cp210x_flow_ctl::ulControlHandshake */
382#define CP210X_SERIAL_DTR_MASK GENMASK(1, 0)
383#define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode)
384#define CP210X_SERIAL_CTS_HANDSHAKE BIT(3)
385#define CP210X_SERIAL_DSR_HANDSHAKE BIT(4)
386#define CP210X_SERIAL_DCD_HANDSHAKE BIT(5)
387#define CP210X_SERIAL_DSR_SENSITIVITY BIT(6)
388
389/* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */
390#define CP210X_SERIAL_DTR_INACTIVE 0
391#define CP210X_SERIAL_DTR_ACTIVE 1
392#define CP210X_SERIAL_DTR_FLOW_CTL 2
393
394/* cp210x_flow_ctl::ulFlowReplace */
395#define CP210X_SERIAL_AUTO_TRANSMIT BIT(0)
396#define CP210X_SERIAL_AUTO_RECEIVE BIT(1)
397#define CP210X_SERIAL_ERROR_CHAR BIT(2)
398#define CP210X_SERIAL_NULL_STRIPPING BIT(3)
399#define CP210X_SERIAL_BREAK_CHAR BIT(4)
400#define CP210X_SERIAL_RTS_MASK GENMASK(7, 6)
401#define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6)
402#define CP210X_SERIAL_XOFF_CONTINUE BIT(31)
403
404/* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */
405#define CP210X_SERIAL_RTS_INACTIVE 0
406#define CP210X_SERIAL_RTS_ACTIVE 1
407#define CP210X_SERIAL_RTS_FLOW_CTL 2
408
Martyn Welchcf5276c2016-10-20 15:13:54 +0100409/* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */
410struct cp210x_pin_mode {
411 u8 eci;
412 u8 sci;
413} __packed;
414
415#define CP210X_PIN_MODE_MODEM 0
416#define CP210X_PIN_MODE_GPIO BIT(0)
417
418/*
419 * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes.
420 * Structure needs padding due to unused/unspecified bytes.
421 */
422struct cp210x_config {
423 __le16 gpio_mode;
424 u8 __pad0[2];
425 __le16 reset_state;
426 u8 __pad1[4];
427 __le16 suspend_state;
428 u8 sci_cfg;
429 u8 eci_cfg;
430 u8 device_cfg;
431} __packed;
432
433/* GPIO modes */
434#define CP210X_SCI_GPIO_MODE_OFFSET 9
435#define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9)
436
437#define CP210X_ECI_GPIO_MODE_OFFSET 2
438#define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2)
439
440/* CP2105 port configuration values */
441#define CP2105_GPIO0_TXLED_MODE BIT(0)
442#define CP2105_GPIO1_RXLED_MODE BIT(1)
443#define CP2105_GPIO1_RS485_MODE BIT(2)
444
445/* CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x2 bytes. */
446struct cp210x_gpio_write {
447 u8 mask;
448 u8 state;
449} __packed;
450
451/*
452 * Helper to get interface number when we only have struct usb_serial.
453 */
454static u8 cp210x_interface_num(struct usb_serial *serial)
455{
456 struct usb_host_interface *cur_altsetting;
457
458 cur_altsetting = serial->interface->cur_altsetting;
459
460 return cur_altsetting->desc.bInterfaceNumber;
461}
462
Craig Shelley39a66b82005-05-27 00:09:56 +0100463/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600464 * Reads a variable-sized block of CP210X_ registers, identified by req.
465 * Returns data into buf in native USB byte order.
Craig Shelley39a66b82005-05-27 00:09:56 +0100466 */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600467static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req,
468 void *buf, int bufsize)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469{
470 struct usb_serial *serial = port->serial;
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500471 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600472 void *dmabuf;
473 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600475 dmabuf = kmalloc(bufsize, GFP_KERNEL);
476 if (!dmabuf) {
477 /*
478 * FIXME Some callers don't bother to check for error,
479 * at least give them consistent junk until they are fixed
480 */
481 memset(buf, 0, bufsize);
Craig Shelley39a66b82005-05-27 00:09:56 +0100482 return -ENOMEM;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600483 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100484
Alan Coxff7eb602008-07-22 11:10:17 +0100485 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600486 req, REQTYPE_INTERFACE_TO_HOST, 0,
487 port_priv->bInterfaceNumber, dmabuf, bufsize,
488 USB_CTRL_SET_TIMEOUT);
489 if (result == bufsize) {
490 memcpy(buf, dmabuf, bufsize);
491 result = 0;
492 } else {
493 dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n",
494 req, bufsize, result);
495 if (result >= 0)
Johan Hovold0407f1c2016-10-19 15:46:39 +0200496 result = -EIO;
Johan Hovold2479e2a2011-11-10 14:58:29 +0100497
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600498 /*
499 * FIXME Some callers don't bother to check for error,
500 * at least give them consistent junk until they are fixed
501 */
502 memset(buf, 0, bufsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 }
504
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600505 kfree(dmabuf);
506
507 return result;
508}
509
510/*
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600511 * Reads any 32-bit CP210X_ register identified by req.
512 */
513static int cp210x_read_u32_reg(struct usb_serial_port *port, u8 req, u32 *val)
514{
515 __le32 le32_val;
516 int err;
517
518 err = cp210x_read_reg_block(port, req, &le32_val, sizeof(le32_val));
519 if (err) {
520 /*
521 * FIXME Some callers don't bother to check for error,
522 * at least give them consistent junk until they are fixed
523 */
524 *val = 0;
525 return err;
526 }
527
528 *val = le32_to_cpu(le32_val);
529
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 return 0;
531}
532
Craig Shelley39a66b82005-05-27 00:09:56 +0100533/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600534 * Reads any 16-bit CP210X_ register identified by req.
Craig Shelley39a66b82005-05-27 00:09:56 +0100535 */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600536static int cp210x_read_u16_reg(struct usb_serial_port *port, u8 req, u16 *val)
537{
538 __le16 le16_val;
539 int err;
540
541 err = cp210x_read_reg_block(port, req, &le16_val, sizeof(le16_val));
542 if (err)
543 return err;
544
545 *val = le16_to_cpu(le16_val);
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600546
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600547 return 0;
548}
549
550/*
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600551 * Reads any 8-bit CP210X_ register identified by req.
552 */
553static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val)
554{
555 return cp210x_read_reg_block(port, req, val, sizeof(*val));
556}
557
558/*
Martyn Welchcf5276c2016-10-20 15:13:54 +0100559 * Reads a variable-sized vendor block of CP210X_ registers, identified by val.
560 * Returns data into buf in native USB byte order.
561 */
562static int cp210x_read_vendor_block(struct usb_serial *serial, u8 type, u16 val,
563 void *buf, int bufsize)
564{
565 void *dmabuf;
566 int result;
567
568 dmabuf = kmalloc(bufsize, GFP_KERNEL);
569 if (!dmabuf)
570 return -ENOMEM;
571
572 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
573 CP210X_VENDOR_SPECIFIC, type, val,
574 cp210x_interface_num(serial), dmabuf, bufsize,
575 USB_CTRL_GET_TIMEOUT);
576 if (result == bufsize) {
577 memcpy(buf, dmabuf, bufsize);
578 result = 0;
579 } else {
580 dev_err(&serial->interface->dev,
581 "failed to get vendor val 0x%04x size %d: %d\n", val,
582 bufsize, result);
583 if (result >= 0)
584 result = -EIO;
585 }
586
587 kfree(dmabuf);
588
589 return result;
590}
591
592/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600593 * Writes any 16-bit CP210X_ register (req) whose value is passed
594 * entirely in the wValue field of the USB request.
595 */
596static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val)
Craig Shelley39a66b82005-05-27 00:09:56 +0100597{
598 struct usb_serial *serial = port->serial;
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -0500599 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600600 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100601
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600602 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
603 req, REQTYPE_HOST_TO_INTERFACE, val,
604 port_priv->bInterfaceNumber, NULL, 0,
605 USB_CTRL_SET_TIMEOUT);
606 if (result < 0) {
607 dev_err(&port->dev, "failed set request 0x%x status: %d\n",
608 req, result);
Craig Shelley39a66b82005-05-27 00:09:56 +0100609 }
610
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600611 return result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100612}
613
614/*
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600615 * Writes a variable-sized block of CP210X_ registers, identified by req.
616 * Data in buf must be in native USB byte order.
Craig Shelley39a66b82005-05-27 00:09:56 +0100617 */
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600618static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
619 void *buf, int bufsize)
Craig Shelley39a66b82005-05-27 00:09:56 +0100620{
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600621 struct usb_serial *serial = port->serial;
622 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
623 void *dmabuf;
624 int result;
625
Muhammad Falak R Wanid6c4dc32016-05-19 19:34:36 +0530626 dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600627 if (!dmabuf)
628 return -ENOMEM;
629
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600630 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
631 req, REQTYPE_HOST_TO_INTERFACE, 0,
632 port_priv->bInterfaceNumber, dmabuf, bufsize,
633 USB_CTRL_SET_TIMEOUT);
634
635 kfree(dmabuf);
636
637 if (result == bufsize) {
638 result = 0;
639 } else {
640 dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n",
641 req, bufsize, result);
642 if (result >= 0)
Johan Hovold0407f1c2016-10-19 15:46:39 +0200643 result = -EIO;
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600644 }
645
646 return result;
647}
648
649/*
650 * Writes any 32-bit CP210X_ register identified by req.
651 */
652static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val)
653{
654 __le32 le32_val;
655
656 le32_val = cpu_to_le32(val);
657
658 return cp210x_write_reg_block(port, req, &le32_val, sizeof(le32_val));
Craig Shelley39a66b82005-05-27 00:09:56 +0100659}
660
Martyn Welchcf5276c2016-10-20 15:13:54 +0100661#ifdef CONFIG_GPIOLIB
662/*
663 * Writes a variable-sized vendor block of CP210X_ registers, identified by val.
664 * Data in buf must be in native USB byte order.
665 */
666static int cp210x_write_vendor_block(struct usb_serial *serial, u8 type,
667 u16 val, void *buf, int bufsize)
668{
669 void *dmabuf;
670 int result;
671
672 dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
673 if (!dmabuf)
674 return -ENOMEM;
675
676 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
677 CP210X_VENDOR_SPECIFIC, type, val,
678 cp210x_interface_num(serial), dmabuf, bufsize,
679 USB_CTRL_SET_TIMEOUT);
680
681 kfree(dmabuf);
682
683 if (result == bufsize) {
684 result = 0;
685 } else {
686 dev_err(&serial->interface->dev,
687 "failed to set vendor val 0x%04x size %d: %d\n", val,
688 bufsize, result);
689 if (result >= 0)
690 result = -EIO;
691 }
692
693 return result;
694}
695#endif
696
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000697/*
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500698 * Detect CP2108 GET_LINE_CTL bug and activate workaround.
699 * Write a known good value 0x800, read it back.
700 * If it comes back swapped the bug is detected.
701 * Preserve the original register value.
702 */
703static int cp210x_detect_swapped_line_ctl(struct usb_serial_port *port)
704{
705 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600706 u16 line_ctl_save;
707 u16 line_ctl_test;
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500708 int err;
709
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600710 err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_save);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500711 if (err)
712 return err;
713
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600714 err = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, 0x800);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500715 if (err)
716 return err;
717
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600718 err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_test);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500719 if (err)
720 return err;
721
722 if (line_ctl_test == 8) {
723 port_priv->has_swapped_line_ctl = true;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600724 line_ctl_save = swab16(line_ctl_save);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500725 }
726
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600727 return cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, line_ctl_save);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500728}
729
730/*
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600731 * Must always be called instead of cp210x_read_u16_reg(CP210X_GET_LINE_CTL)
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500732 * to workaround cp2108 bug and get correct value.
733 */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600734static int cp210x_get_line_ctl(struct usb_serial_port *port, u16 *ctl)
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500735{
736 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
737 int err;
738
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600739 err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, ctl);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500740 if (err)
741 return err;
742
743 /* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */
744 if (port_priv->has_swapped_line_ctl)
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600745 *ctl = swab16(*ctl);
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500746
747 return 0;
748}
749
750/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100751 * cp210x_quantise_baudrate
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000752 * Quantises the baud rate as per AN205 Table 1
753 */
Johan Hovold4f2ab882012-10-29 10:56:19 +0100754static unsigned int cp210x_quantise_baudrate(unsigned int baud)
755{
Johan Hovoldbe125d92012-01-16 00:36:50 +0100756 if (baud <= 300)
757 baud = 300;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000758 else if (baud <= 600) baud = 600;
759 else if (baud <= 1200) baud = 1200;
760 else if (baud <= 1800) baud = 1800;
761 else if (baud <= 2400) baud = 2400;
762 else if (baud <= 4000) baud = 4000;
763 else if (baud <= 4803) baud = 4800;
764 else if (baud <= 7207) baud = 7200;
765 else if (baud <= 9612) baud = 9600;
766 else if (baud <= 14428) baud = 14400;
767 else if (baud <= 16062) baud = 16000;
768 else if (baud <= 19250) baud = 19200;
769 else if (baud <= 28912) baud = 28800;
770 else if (baud <= 38601) baud = 38400;
771 else if (baud <= 51558) baud = 51200;
772 else if (baud <= 56280) baud = 56000;
773 else if (baud <= 58053) baud = 57600;
774 else if (baud <= 64111) baud = 64000;
775 else if (baud <= 77608) baud = 76800;
776 else if (baud <= 117028) baud = 115200;
777 else if (baud <= 129347) baud = 128000;
778 else if (baud <= 156868) baud = 153600;
779 else if (baud <= 237832) baud = 230400;
780 else if (baud <= 254234) baud = 250000;
781 else if (baud <= 273066) baud = 256000;
782 else if (baud <= 491520) baud = 460800;
783 else if (baud <= 567138) baud = 500000;
784 else if (baud <= 670254) baud = 576000;
Johan Hovoldd1620ca2012-01-16 00:36:53 +0100785 else if (baud < 1000000)
786 baud = 921600;
787 else if (baud > 2000000)
788 baud = 2000000;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000789 return baud;
790}
791
Alan Coxa509a7e2009-09-19 13:13:26 -0700792static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 int result;
795
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600796 result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100797 if (result) {
798 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
799 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 }
801
Craig Shelley39a66b82005-05-27 00:09:56 +0100802 /* Configure the termios structure */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100803 cp210x_get_termios(tty, port);
Johan Hovold55b2afb2012-01-16 00:36:48 +0100804
Johan Hovoldcdc32fd2012-01-16 00:36:52 +0100805 /* The baud rate must be initialised on cp2104 */
806 if (tty)
807 cp210x_change_speed(tty, port, NULL);
808
Johan Hovold55b2afb2012-01-16 00:36:48 +0100809 return usb_serial_generic_open(tty, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810}
811
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100812static void cp210x_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813{
Johan Hovoldf26788d2010-03-17 23:00:45 +0100814 usb_serial_generic_close(port);
Konstantin Shkolnyyebfb3192015-10-28 16:02:03 -0500815
816 /* Clear both queues; cp2108 needs this to avoid an occasional hang */
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600817 cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL);
Konstantin Shkolnyyebfb3192015-10-28 16:02:03 -0500818
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600819 cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820}
821
Craig Shelley39a66b82005-05-27 00:09:56 +0100822/*
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -0600823 * Read how many bytes are waiting in the TX queue.
824 */
825static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port,
826 u32 *count)
827{
828 struct usb_serial *serial = port->serial;
829 struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
830 struct cp210x_comm_status *sts;
831 int result;
832
833 sts = kmalloc(sizeof(*sts), GFP_KERNEL);
834 if (!sts)
835 return -ENOMEM;
836
837 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
838 CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST,
839 0, port_priv->bInterfaceNumber, sts, sizeof(*sts),
840 USB_CTRL_GET_TIMEOUT);
841 if (result == sizeof(*sts)) {
842 *count = le32_to_cpu(sts->ulAmountInOutQueue);
843 result = 0;
844 } else {
845 dev_err(&port->dev, "failed to get comm status: %d\n", result);
846 if (result >= 0)
Johan Hovold0407f1c2016-10-19 15:46:39 +0200847 result = -EIO;
Konstantin Shkolnyy6f923a02015-11-24 16:28:41 -0600848 }
849
850 kfree(sts);
851
852 return result;
853}
854
855static bool cp210x_tx_empty(struct usb_serial_port *port)
856{
857 int err;
858 u32 count;
859
860 err = cp210x_get_tx_queue_byte_count(port, &count);
861 if (err)
862 return true;
863
864 return !count;
865}
866
867/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100868 * cp210x_get_termios
Craig Shelley39a66b82005-05-27 00:09:56 +0100869 * Reads the baud rate, data bits, parity, stop bits and flow control mode
870 * from the device, corrects any unsupported values, and configures the
871 * termios structure to reflect the state of the device
872 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100873static void cp210x_get_termios(struct tty_struct *tty,
VomLehnd2ad67b2009-03-12 14:37:42 -0700874 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875{
VomLehnd2ad67b2009-03-12 14:37:42 -0700876 unsigned int baud;
877
878 if (tty) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100879 cp210x_get_termios_port(tty->driver_data,
Alan Coxadc8d742012-07-14 15:31:47 +0100880 &tty->termios.c_cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700881 tty_encode_baud_rate(tty, baud, baud);
Johan Hovold4f2ab882012-10-29 10:56:19 +0100882 } else {
Geert Uytterhoeven009615ab2016-11-21 13:19:31 +0100883 tcflag_t cflag;
VomLehnd2ad67b2009-03-12 14:37:42 -0700884 cflag = 0;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100885 cp210x_get_termios_port(port, &cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700886 }
887}
888
889/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100890 * cp210x_get_termios_port
891 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
VomLehnd2ad67b2009-03-12 14:37:42 -0700892 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100893static void cp210x_get_termios_port(struct usb_serial_port *port,
Geert Uytterhoeven009615ab2016-11-21 13:19:31 +0100894 tcflag_t *cflagp, unsigned int *baudp)
VomLehnd2ad67b2009-03-12 14:37:42 -0700895{
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700896 struct device *dev = &port->dev;
Geert Uytterhoeven009615ab2016-11-21 13:19:31 +0100897 tcflag_t cflag;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500898 struct cp210x_flow_ctl flow_ctl;
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600899 u32 baud;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600900 u16 bits;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500901 u32 ctl_hs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -0600903 cp210x_read_u32_reg(port, CP210X_GET_BAUDRATE, &baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700905 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700906 *baudp = baud;
Alan Cox9ab0f202007-10-18 01:24:24 -0700907
VomLehnd2ad67b2009-03-12 14:37:42 -0700908 cflag = *cflagp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -0500910 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 cflag &= ~CSIZE;
Alan Coxff7eb602008-07-22 11:10:17 +0100912 switch (bits & BITS_DATA_MASK) {
913 case BITS_DATA_5:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700914 dev_dbg(dev, "%s - data bits = 5\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100915 cflag |= CS5;
916 break;
917 case BITS_DATA_6:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700918 dev_dbg(dev, "%s - data bits = 6\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100919 cflag |= CS6;
920 break;
921 case BITS_DATA_7:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700922 dev_dbg(dev, "%s - data bits = 7\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100923 cflag |= CS7;
924 break;
925 case BITS_DATA_8:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700926 dev_dbg(dev, "%s - data bits = 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100927 cflag |= CS8;
928 break;
929 case BITS_DATA_9:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700930 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100931 cflag |= CS8;
932 bits &= ~BITS_DATA_MASK;
933 bits |= BITS_DATA_8;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600934 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100935 break;
936 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700937 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100938 cflag |= CS8;
939 bits &= ~BITS_DATA_MASK;
940 bits |= BITS_DATA_8;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600941 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100942 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 }
944
Alan Coxff7eb602008-07-22 11:10:17 +0100945 switch (bits & BITS_PARITY_MASK) {
946 case BITS_PARITY_NONE:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700947 dev_dbg(dev, "%s - parity = NONE\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100948 cflag &= ~PARENB;
949 break;
950 case BITS_PARITY_ODD:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700951 dev_dbg(dev, "%s - parity = ODD\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100952 cflag |= (PARENB|PARODD);
953 break;
954 case BITS_PARITY_EVEN:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700955 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100956 cflag &= ~PARODD;
957 cflag |= PARENB;
958 break;
959 case BITS_PARITY_MARK:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700960 dev_dbg(dev, "%s - parity = MARK\n", __func__);
Roland Koebler4b6181c2011-11-09 19:37:08 +0100961 cflag |= (PARENB|PARODD|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100962 break;
963 case BITS_PARITY_SPACE:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700964 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
Roland Koebler4b6181c2011-11-09 19:37:08 +0100965 cflag &= ~PARODD;
966 cflag |= (PARENB|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100967 break;
968 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700969 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100970 cflag &= ~PARENB;
971 bits &= ~BITS_PARITY_MASK;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600972 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100973 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 }
975
976 cflag &= ~CSTOPB;
Alan Coxff7eb602008-07-22 11:10:17 +0100977 switch (bits & BITS_STOP_MASK) {
978 case BITS_STOP_1:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700979 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100980 break;
981 case BITS_STOP_1_5:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700982 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100983 bits &= ~BITS_STOP_MASK;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600984 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100985 break;
986 case BITS_STOP_2:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700987 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100988 cflag |= CSTOPB;
989 break;
990 default:
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -0700991 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +0100992 bits &= ~BITS_STOP_MASK;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -0600993 cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
Alan Coxff7eb602008-07-22 11:10:17 +0100994 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 }
996
Konstantin Shkolnyy90343892016-05-04 16:57:02 -0500997 cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
998 sizeof(flow_ctl));
999 ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
1000 if (ctl_hs & CP210X_SERIAL_CTS_HANDSHAKE) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001001 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +01001002 cflag |= CRTSCTS;
1003 } else {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001004 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +01001005 cflag &= ~CRTSCTS;
1006 }
1007
VomLehnd2ad67b2009-03-12 14:37:42 -07001008 *cflagp = cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009}
1010
Johan Hovolde5990872012-01-16 00:36:51 +01001011/*
1012 * CP2101 supports the following baud rates:
1013 *
1014 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
1015 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
1016 *
1017 * CP2102 and CP2103 support the following additional rates:
1018 *
1019 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
1020 * 576000
1021 *
1022 * The device will map a requested rate to a supported one, but the result
1023 * of requests for rates greater than 1053257 is undefined (see AN205).
1024 *
1025 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
1026 * respectively, with an error less than 1%. The actual rates are determined
1027 * by
1028 *
1029 * div = round(freq / (2 x prescale x request))
1030 * actual = freq / (2 x prescale x div)
1031 *
1032 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
1033 * or 1 otherwise.
1034 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
1035 * otherwise.
1036 */
1037static void cp210x_change_speed(struct tty_struct *tty,
1038 struct usb_serial_port *port, struct ktermios *old_termios)
1039{
1040 u32 baud;
1041
Alan Coxadc8d742012-07-14 15:31:47 +01001042 baud = tty->termios.c_ospeed;
Johan Hovolde5990872012-01-16 00:36:51 +01001043
Johan Hovoldd1620ca2012-01-16 00:36:53 +01001044 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
1045 * or to an arbitrary rate in [1M,2M].
Johan Hovolde5990872012-01-16 00:36:51 +01001046 *
1047 * NOTE: B0 is not implemented.
1048 */
1049 baud = cp210x_quantise_baudrate(baud);
1050
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001051 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -06001052 if (cp210x_write_u32_reg(port, CP210X_SET_BAUDRATE, baud)) {
Johan Hovolde5990872012-01-16 00:36:51 +01001053 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
1054 if (old_termios)
1055 baud = old_termios->c_ospeed;
1056 else
1057 baud = 9600;
1058 }
1059
1060 tty_encode_baud_rate(tty, baud, baud);
1061}
1062
Craig Shelley4cc27bd2009-06-11 13:54:40 +01001063static void cp210x_set_termios(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +01001064 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065{
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001066 struct device *dev = &port->dev;
Alan Cox9ab0f202007-10-18 01:24:24 -07001067 unsigned int cflag, old_cflag;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001068 u16 bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069
Alan Coxadc8d742012-07-14 15:31:47 +01001070 cflag = tty->termios.c_cflag;
Alan Cox01e96d22007-07-26 18:54:12 +01001071 old_cflag = old_termios->c_cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
Alan Coxadc8d742012-07-14 15:31:47 +01001073 if (tty->termios.c_ospeed != old_termios->c_ospeed)
Johan Hovolde5990872012-01-16 00:36:51 +01001074 cp210x_change_speed(tty, port, old_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075
Craig Shelley39a66b82005-05-27 00:09:56 +01001076 /* If the number of data bits is to be updated */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -05001078 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 bits &= ~BITS_DATA_MASK;
1080 switch (cflag & CSIZE) {
Alan Coxff7eb602008-07-22 11:10:17 +01001081 case CS5:
1082 bits |= BITS_DATA_5;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001083 dev_dbg(dev, "%s - data bits = 5\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +01001084 break;
1085 case CS6:
1086 bits |= BITS_DATA_6;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001087 dev_dbg(dev, "%s - data bits = 6\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +01001088 break;
1089 case CS7:
1090 bits |= BITS_DATA_7;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001091 dev_dbg(dev, "%s - data bits = 7\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +01001092 break;
1093 case CS8:
Johan Hovoldc2b33552016-10-19 15:46:38 +02001094 default:
Alan Coxff7eb602008-07-22 11:10:17 +01001095 bits |= BITS_DATA_8;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001096 dev_dbg(dev, "%s - data bits = 8\n", __func__);
Alan Coxff7eb602008-07-22 11:10:17 +01001097 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 }
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001099 if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001100 dev_dbg(dev, "Number of data bits requested not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 }
1102
Roland Koebler4b6181c2011-11-09 19:37:08 +01001103 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
1104 (old_cflag & (PARENB|PARODD|CMSPAR))) {
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -05001105 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 bits &= ~BITS_PARITY_MASK;
1107 if (cflag & PARENB) {
Roland Koebler4b6181c2011-11-09 19:37:08 +01001108 if (cflag & CMSPAR) {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001109 if (cflag & PARODD) {
1110 bits |= BITS_PARITY_MARK;
1111 dev_dbg(dev, "%s - parity = MARK\n", __func__);
1112 } else {
1113 bits |= BITS_PARITY_SPACE;
1114 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
1115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 } else {
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001117 if (cflag & PARODD) {
1118 bits |= BITS_PARITY_ODD;
1119 dev_dbg(dev, "%s - parity = ODD\n", __func__);
1120 } else {
1121 bits |= BITS_PARITY_EVEN;
1122 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
1123 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 }
1125 }
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001126 if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001127 dev_dbg(dev, "Parity mode not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 }
1129
1130 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -05001131 cp210x_get_line_ctl(port, &bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 bits &= ~BITS_STOP_MASK;
1133 if (cflag & CSTOPB) {
1134 bits |= BITS_STOP_2;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001135 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 } else {
1137 bits |= BITS_STOP_1;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001138 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 }
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001140 if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001141 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 }
Craig Shelley39a66b82005-05-27 00:09:56 +01001143
1144 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001145 struct cp210x_flow_ctl flow_ctl;
1146 u32 ctl_hs;
1147 u32 flow_repl;
Konstantin Shkolnyy7084fa82016-02-28 15:51:56 -06001148
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001149 cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
1150 sizeof(flow_ctl));
1151 ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
1152 flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace);
1153 dev_dbg(dev, "%s - read ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
1154 __func__, ctl_hs, flow_repl);
Konstantin Shkolnyy7084fa82016-02-28 15:51:56 -06001155
Konstantin Shkolnyyab5701a2016-05-04 16:57:11 -05001156 ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE;
1157 ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE;
1158 ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY;
1159 ctl_hs &= ~CP210X_SERIAL_DTR_MASK;
1160 ctl_hs |= CP210X_SERIAL_DTR_SHIFT(CP210X_SERIAL_DTR_ACTIVE);
Craig Shelley39a66b82005-05-27 00:09:56 +01001161 if (cflag & CRTSCTS) {
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001162 ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE;
Konstantin Shkolnyyab5701a2016-05-04 16:57:11 -05001163
1164 flow_repl &= ~CP210X_SERIAL_RTS_MASK;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001165 flow_repl |= CP210X_SERIAL_RTS_SHIFT(
1166 CP210X_SERIAL_RTS_FLOW_CTL);
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001167 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +01001168 } else {
Konstantin Shkolnyyab5701a2016-05-04 16:57:11 -05001169 ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
1170
1171 flow_repl &= ~CP210X_SERIAL_RTS_MASK;
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001172 flow_repl |= CP210X_SERIAL_RTS_SHIFT(
1173 CP210X_SERIAL_RTS_ACTIVE);
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001174 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +01001175 }
1176
Konstantin Shkolnyy90343892016-05-04 16:57:02 -05001177 dev_dbg(dev, "%s - write ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
1178 __func__, ctl_hs, flow_repl);
1179 flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs);
1180 flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
1181 cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
1182 sizeof(flow_ctl));
Craig Shelley39a66b82005-05-27 00:09:56 +01001183 }
1184
1185}
1186
Johan Hovold4f2ab882012-10-29 10:56:19 +01001187static int cp210x_tiocmset(struct tty_struct *tty,
Craig Shelley39a66b82005-05-27 00:09:56 +01001188 unsigned int set, unsigned int clear)
1189{
Alan Cox95da3102008-07-22 11:09:07 +01001190 struct usb_serial_port *port = tty->driver_data;
Alan Cox20b9d172011-02-14 16:26:50 +00001191 return cp210x_tiocmset_port(port, set, clear);
VomLehnd2ad67b2009-03-12 14:37:42 -07001192}
1193
Alan Cox20b9d172011-02-14 16:26:50 +00001194static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -07001195 unsigned int set, unsigned int clear)
1196{
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001197 u16 control = 0;
Craig Shelley39a66b82005-05-27 00:09:56 +01001198
Craig Shelley39a66b82005-05-27 00:09:56 +01001199 if (set & TIOCM_RTS) {
1200 control |= CONTROL_RTS;
1201 control |= CONTROL_WRITE_RTS;
1202 }
1203 if (set & TIOCM_DTR) {
1204 control |= CONTROL_DTR;
1205 control |= CONTROL_WRITE_DTR;
1206 }
1207 if (clear & TIOCM_RTS) {
1208 control &= ~CONTROL_RTS;
1209 control |= CONTROL_WRITE_RTS;
1210 }
1211 if (clear & TIOCM_DTR) {
1212 control &= ~CONTROL_DTR;
1213 control |= CONTROL_WRITE_DTR;
1214 }
1215
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001216 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +01001217
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001218 return cp210x_write_u16_reg(port, CP210X_SET_MHS, control);
Craig Shelley39a66b82005-05-27 00:09:56 +01001219}
1220
Alan Coxd94c7bd2009-10-28 21:12:33 +01001221static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
1222{
1223 if (on)
Alan Cox20b9d172011-02-14 16:26:50 +00001224 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
Alan Coxd94c7bd2009-10-28 21:12:33 +01001225 else
Alan Cox20b9d172011-02-14 16:26:50 +00001226 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
Alan Coxd94c7bd2009-10-28 21:12:33 +01001227}
1228
Johan Hovold4f2ab882012-10-29 10:56:19 +01001229static int cp210x_tiocmget(struct tty_struct *tty)
Craig Shelley39a66b82005-05-27 00:09:56 +01001230{
Alan Cox95da3102008-07-22 11:09:07 +01001231 struct usb_serial_port *port = tty->driver_data;
Konstantin Shkolnyyfe1b07e2016-02-28 15:51:41 -06001232 u8 control;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -07001233 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +01001234
Johan Hovoldde24e0a2016-10-19 15:45:07 +02001235 result = cp210x_read_u8_reg(port, CP210X_GET_MDMSTS, &control);
1236 if (result)
1237 return result;
Craig Shelley39a66b82005-05-27 00:09:56 +01001238
1239 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
1240 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
1241 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
1242 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
1243 |((control & CONTROL_RING)? TIOCM_RI : 0)
1244 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
1245
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001246 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +01001247
1248 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249}
1250
Johan Hovold4f2ab882012-10-29 10:56:19 +01001251static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252{
Alan Cox95da3102008-07-22 11:09:07 +01001253 struct usb_serial_port *port = tty->driver_data;
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001254 u16 state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 if (break_state == 0)
1257 state = BREAK_OFF;
1258 else
1259 state = BREAK_ON;
Greg Kroah-Hartman660f3b12012-09-13 17:18:13 -07001260 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
1261 state == BREAK_OFF ? "off" : "on");
Konstantin Shkolnyy19165b22016-02-28 15:51:30 -06001262 cp210x_write_u16_reg(port, CP210X_SET_BREAK, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263}
1264
Martyn Welchcf5276c2016-10-20 15:13:54 +01001265#ifdef CONFIG_GPIOLIB
1266static int cp210x_gpio_request(struct gpio_chip *gc, unsigned int offset)
1267{
1268 struct usb_serial *serial = gpiochip_get_data(gc);
1269 struct cp210x_serial_private *priv = usb_get_serial_data(serial);
1270
1271 switch (offset) {
1272 case 0:
1273 if (priv->config & CP2105_GPIO0_TXLED_MODE)
1274 return -ENODEV;
1275 break;
1276 case 1:
1277 if (priv->config & (CP2105_GPIO1_RXLED_MODE |
1278 CP2105_GPIO1_RS485_MODE))
1279 return -ENODEV;
1280 break;
1281 }
1282
1283 return 0;
1284}
1285
1286static int cp210x_gpio_get(struct gpio_chip *gc, unsigned int gpio)
1287{
1288 struct usb_serial *serial = gpiochip_get_data(gc);
1289 int result;
1290 u8 buf;
1291
1292 result = cp210x_read_vendor_block(serial, REQTYPE_INTERFACE_TO_HOST,
1293 CP210X_READ_LATCH, &buf, sizeof(buf));
1294 if (result < 0)
1295 return result;
1296
1297 return !!(buf & BIT(gpio));
1298}
1299
1300static void cp210x_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value)
1301{
1302 struct usb_serial *serial = gpiochip_get_data(gc);
1303 struct cp210x_gpio_write buf;
1304
1305 if (value == 1)
1306 buf.state = BIT(gpio);
1307 else
1308 buf.state = 0;
1309
1310 buf.mask = BIT(gpio);
1311
1312 cp210x_write_vendor_block(serial, REQTYPE_HOST_TO_INTERFACE,
1313 CP210X_WRITE_LATCH, &buf, sizeof(buf));
1314}
1315
1316static int cp210x_gpio_direction_get(struct gpio_chip *gc, unsigned int gpio)
1317{
1318 /* Hardware does not support an input mode */
1319 return 0;
1320}
1321
1322static int cp210x_gpio_direction_input(struct gpio_chip *gc, unsigned int gpio)
1323{
1324 /* Hardware does not support an input mode */
1325 return -ENOTSUPP;
1326}
1327
1328static int cp210x_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio,
1329 int value)
1330{
1331 return 0;
1332}
1333
1334static int cp210x_gpio_set_single_ended(struct gpio_chip *gc, unsigned int gpio,
1335 enum single_ended_mode mode)
1336{
1337 struct usb_serial *serial = gpiochip_get_data(gc);
1338 struct cp210x_serial_private *priv = usb_get_serial_data(serial);
1339
1340 /* Succeed only if in correct mode (this can't be set at runtime) */
1341 if ((mode == LINE_MODE_PUSH_PULL) && (priv->gpio_mode & BIT(gpio)))
1342 return 0;
1343
1344 if ((mode == LINE_MODE_OPEN_DRAIN) && !(priv->gpio_mode & BIT(gpio)))
1345 return 0;
1346
1347 return -ENOTSUPP;
1348}
1349
1350/*
1351 * This function is for configuring GPIO using shared pins, where other signals
1352 * are made unavailable by configuring the use of GPIO. This is believed to be
1353 * only applicable to the cp2105 at this point, the other devices supported by
1354 * this driver that provide GPIO do so in a way that does not impact other
1355 * signals and are thus expected to have very different initialisation.
1356 */
1357static int cp2105_shared_gpio_init(struct usb_serial *serial)
1358{
1359 struct cp210x_serial_private *priv = usb_get_serial_data(serial);
1360 struct cp210x_pin_mode mode;
1361 struct cp210x_config config;
1362 u8 intf_num = cp210x_interface_num(serial);
1363 int result;
1364
1365 result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
1366 CP210X_GET_DEVICEMODE, &mode,
1367 sizeof(mode));
1368 if (result < 0)
1369 return result;
1370
1371 result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
1372 CP210X_GET_PORTCONFIG, &config,
1373 sizeof(config));
1374 if (result < 0)
1375 return result;
1376
1377 /* 2 banks of GPIO - One for the pins taken from each serial port */
1378 if (intf_num == 0) {
1379 if (mode.eci == CP210X_PIN_MODE_MODEM)
1380 return 0;
1381
1382 priv->config = config.eci_cfg;
1383 priv->gpio_mode = (u8)((le16_to_cpu(config.gpio_mode) &
1384 CP210X_ECI_GPIO_MODE_MASK) >>
1385 CP210X_ECI_GPIO_MODE_OFFSET);
1386 priv->gc.ngpio = 2;
1387 } else if (intf_num == 1) {
1388 if (mode.sci == CP210X_PIN_MODE_MODEM)
1389 return 0;
1390
1391 priv->config = config.sci_cfg;
1392 priv->gpio_mode = (u8)((le16_to_cpu(config.gpio_mode) &
1393 CP210X_SCI_GPIO_MODE_MASK) >>
1394 CP210X_SCI_GPIO_MODE_OFFSET);
1395 priv->gc.ngpio = 3;
1396 } else {
1397 return -ENODEV;
1398 }
1399
1400 priv->gc.label = "cp210x";
1401 priv->gc.request = cp210x_gpio_request;
1402 priv->gc.get_direction = cp210x_gpio_direction_get;
1403 priv->gc.direction_input = cp210x_gpio_direction_input;
1404 priv->gc.direction_output = cp210x_gpio_direction_output;
1405 priv->gc.get = cp210x_gpio_get;
1406 priv->gc.set = cp210x_gpio_set;
1407 priv->gc.set_single_ended = cp210x_gpio_set_single_ended;
1408 priv->gc.owner = THIS_MODULE;
1409 priv->gc.parent = &serial->interface->dev;
1410 priv->gc.base = -1;
1411 priv->gc.can_sleep = true;
1412
1413 result = gpiochip_add_data(&priv->gc, serial);
1414 if (!result)
Johan Hovold6b7271d22016-10-24 11:58:12 +02001415 priv->gpio_registered = true;
Martyn Welchcf5276c2016-10-20 15:13:54 +01001416
1417 return result;
1418}
1419
1420static void cp210x_gpio_remove(struct usb_serial *serial)
1421{
1422 struct cp210x_serial_private *priv = usb_get_serial_data(serial);
1423
1424 if (priv->gpio_registered) {
1425 gpiochip_remove(&priv->gc);
Johan Hovold6b7271d22016-10-24 11:58:12 +02001426 priv->gpio_registered = false;
Martyn Welchcf5276c2016-10-20 15:13:54 +01001427 }
1428}
1429
1430#else
1431
1432static int cp2105_shared_gpio_init(struct usb_serial *serial)
1433{
1434 return 0;
1435}
1436
1437static void cp210x_gpio_remove(struct usb_serial *serial)
1438{
1439 /* Nothing to do */
1440}
1441
1442#endif
1443
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001444static int cp210x_port_probe(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445{
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001446 struct usb_serial *serial = port->serial;
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001447 struct cp210x_port_private *port_priv;
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -05001448 int ret;
Preston Ficka5360a52012-02-24 13:42:39 -06001449
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001450 port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
1451 if (!port_priv)
Johan Hovold4295fe72012-10-15 15:47:20 +02001452 return -ENOMEM;
Preston Ficka5360a52012-02-24 13:42:39 -06001453
Martyn Welchcf5276c2016-10-20 15:13:54 +01001454 port_priv->bInterfaceNumber = cp210x_interface_num(serial);
Preston Ficka5360a52012-02-24 13:42:39 -06001455
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001456 usb_set_serial_port_data(port, port_priv);
Preston Ficka5360a52012-02-24 13:42:39 -06001457
Konstantin Shkolnyyd0bf1ff2015-10-28 16:02:54 -05001458 ret = cp210x_detect_swapped_line_ctl(port);
1459 if (ret) {
1460 kfree(port_priv);
1461 return ret;
1462 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
1464 return 0;
1465}
1466
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001467static int cp210x_port_remove(struct usb_serial_port *port)
Preston Ficka5360a52012-02-24 13:42:39 -06001468{
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001469 struct cp210x_port_private *port_priv;
Preston Ficka5360a52012-02-24 13:42:39 -06001470
Konstantin Shkolnyye2ae67a2015-10-28 16:02:34 -05001471 port_priv = usb_get_serial_port_data(port);
1472 kfree(port_priv);
1473
1474 return 0;
Preston Ficka5360a52012-02-24 13:42:39 -06001475}
1476
Martyn Welchcf5276c2016-10-20 15:13:54 +01001477static int cp210x_attach(struct usb_serial *serial)
1478{
1479 int result;
1480 struct cp210x_serial_private *priv;
1481
1482 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1483 if (!priv)
1484 return -ENOMEM;
1485
1486 result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
1487 CP210X_GET_PARTNUM, &priv->partnum,
1488 sizeof(priv->partnum));
1489 if (result < 0)
1490 goto err_free_priv;
1491
1492 usb_set_serial_data(serial, priv);
1493
1494 if (priv->partnum == CP210X_PARTNUM_CP2105) {
1495 result = cp2105_shared_gpio_init(serial);
1496 if (result < 0) {
1497 dev_err(&serial->interface->dev,
1498 "GPIO initialisation failed, continuing without GPIO support\n");
1499 }
1500 }
1501
1502 return 0;
1503err_free_priv:
1504 kfree(priv);
1505
1506 return result;
1507}
1508
1509static void cp210x_disconnect(struct usb_serial *serial)
1510{
1511 cp210x_gpio_remove(serial);
1512}
1513
1514static void cp210x_release(struct usb_serial *serial)
1515{
1516 struct cp210x_serial_private *priv = usb_get_serial_data(serial);
1517
1518 cp210x_gpio_remove(serial);
1519
1520 kfree(priv);
1521}
1522
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -07001523module_usb_serial_driver(serial_drivers, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524
1525MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526MODULE_LICENSE("GPL");