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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
27/*
28 * Version Information
29 */
Craig Shelley93ef1f12009-06-11 13:53:30 +010030#define DRIVER_VERSION "v0.09"
Craig Shelley4cc27bd2009-06-11 13:54:40 +010031#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33/*
34 * Function Prototypes
35 */
Alan Coxa509a7e2009-09-19 13:13:26 -070036static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010037static void cp210x_close(struct usb_serial_port *);
38static void cp210x_get_termios(struct tty_struct *,
VomLehnd2ad67b2009-03-12 14:37:42 -070039 struct usb_serial_port *port);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010040static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -070041 unsigned int *cflagp, unsigned int *baudp);
Johan Hovolde5990872012-01-16 00:36:51 +010042static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
43 struct ktermios *);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010044static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
Alan Cox95da3102008-07-22 11:09:07 +010045 struct ktermios*);
Alan Cox60b33c12011-02-14 16:26:14 +000046static int cp210x_tiocmget(struct tty_struct *);
Alan Cox20b9d172011-02-14 16:26:50 +000047static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
48static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -070049 unsigned int, unsigned int);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010050static void cp210x_break_ctl(struct tty_struct *, int);
51static int cp210x_startup(struct usb_serial *);
Alan Coxd94c7bd2009-10-28 21:12:33 +010052static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Rusty Russell90ab5ee2012-01-13 09:32:20 +103054static bool debug;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Németh Márton7d40d7e2010-01-10 15:34:24 +010056static const struct usb_device_id id_table[] = {
DJ Delorie2f1136d2010-09-17 11:09:06 -040057 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
M Kondrin5091b582008-11-14 13:02:45 +030058 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
Craig Shelley59fba742008-04-12 16:15:54 +010059 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
A E Lawrence5b22a322010-08-29 21:51:52 +010060 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010061 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
Edouard Lafargue1f4f7142007-09-25 10:15:36 +020062 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010063 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
Craig Shelleyeefd9022010-05-15 13:36:38 +010064 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
65 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
Craig Shelley198b9512005-08-28 09:51:15 +010066 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
Martin Kusserow014840e2007-12-21 12:02:17 +010067 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
Craig Shelley59fba742008-04-12 16:15:54 +010068 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
Craig Shelley198b9512005-08-28 09:51:15 +010069 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000070 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
71 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010072 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
Amit Kucheria0601e112009-07-06 14:19:59 +030073 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
74 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +000075 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
Craig Shelley59224f52006-03-11 11:29:02 +000076 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
Craig Shelleyeefd9022010-05-15 13:36:38 +010077 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
78 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
Craig Shelley92f5cae22007-04-20 14:37:17 +010079 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
Damir N Abdullin9a18e752008-10-30 13:52:38 -070080 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
Vitja Makarov212a4b42006-05-31 00:40:06 +040081 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
Craig Shelleyeefd9022010-05-15 13:36:38 +010082 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000083 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
84 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
Craig Shelley92f5cae22007-04-20 14:37:17 +010085 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +000086 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
Craig Shelleyba0f3322008-09-04 21:28:21 +010087 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
Craig Shelleye988fc82006-01-20 00:06:19 +000088 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
Craig Shelley8bf16ba2009-07-12 21:52:33 +010089 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
Jon K Hellanfc4bd642007-02-28 23:04:33 +010090 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
91 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
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 Shelleyeefd9022010-05-15 13:36:38 +010094 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
Robert M. Kenneyc6535662009-02-26 14:58:39 -050095 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
Bernhard Beck966236972008-05-11 09:23:13 -070096 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
Malte Schröder08e87d02012-01-05 20:34:40 +010097 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
Craig Shelley59fba742008-04-12 16:15:54 +010098 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
Craig Shelleyeefd9022010-05-15 13:36:38 +010099 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200100 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
101 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
Jeff Long8be27c22007-11-28 11:02:09 -0500102 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
Alan Coxbd07c552010-02-08 10:10:44 +0000103 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100104 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200105 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
Tomasz K877e2622009-01-04 12:47:11 +0100106 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300107 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
Florian Fainellic851e832011-05-10 11:17:33 +0200108 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100109 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
Craig Shelleyba0f3322008-09-04 21:28:21 +0100110 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100111 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
Craig Shelley881e3c92008-11-09 20:17:54 +0000112 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000113 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100114 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000115 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
Alex Stephensd23bac92009-03-17 00:06:19 +0000116 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
Craig Shelley541e05e2010-08-23 20:50:57 +0100117 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000118 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
119 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
120 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
121 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
Craig Shelleye988fc82006-01-20 00:06:19 +0000122 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
Craig Shelley61926b92006-10-12 22:09:56 +0100123 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100124 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000125 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
126 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
127 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
128 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
Pozsar Balazsebaf4942007-02-16 12:47:49 +0100129 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100130 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
Johannes Hoelzle05998d2006-12-02 16:54:27 +0100131 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100132 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000133 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
Josef Balatkab0ce84d2005-11-17 09:47:24 -0800134 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
Alessio Igor Bogani356c5a42010-07-27 23:05:14 +0200135 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
136 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
137 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
138 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
Bruno Thomsenc6c1e442012-02-21 23:41:37 +0100139 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
140 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
Craig Shelley541e05e2010-08-23 20:50:57 +0100141 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
142 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
143 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
Anders Larsen93ad03d2010-10-06 23:46:25 +0200144 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
Renato Caldas791b7d72012-01-06 15:20:51 +0000145 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
Craig Shelley541e05e2010-08-23 20:50:57 +0100146 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
Craig Shelley39a66b82005-05-27 00:09:56 +0100147 { } /* Terminating Entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148};
149
Alan Coxff7eb602008-07-22 11:10:17 +0100150MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100152static struct usb_driver cp210x_driver = {
153 .name = "cp210x",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 .probe = usb_serial_probe,
155 .disconnect = usb_serial_disconnect,
156 .id_table = id_table,
157};
158
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100159static struct usb_serial_driver cp210x_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700160 .driver = {
161 .owner = THIS_MODULE,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100162 .name = "cp210x",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700163 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 .num_ports = 1,
Johan Hovoldaea006b2010-03-17 23:00:39 +0100166 .bulk_in_size = 256,
Johan Hovoldd4e598f2010-03-17 23:00:38 +0100167 .bulk_out_size = 256,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100168 .open = cp210x_open,
169 .close = cp210x_close,
170 .break_ctl = cp210x_break_ctl,
171 .set_termios = cp210x_set_termios,
172 .tiocmget = cp210x_tiocmget,
173 .tiocmset = cp210x_tiocmset,
174 .attach = cp210x_startup,
Libor Pechacekd14fc1a2011-01-14 14:30:21 +0100175 .dtr_rts = cp210x_dtr_rts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176};
177
Alan Stern08a4f6b2012-02-23 14:56:17 -0500178static struct usb_serial_driver * const serial_drivers[] = {
179 &cp210x_device, NULL
180};
181
Craig Shelley39a66b82005-05-27 00:09:56 +0100182/* Config request types */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183#define REQTYPE_HOST_TO_DEVICE 0x41
184#define REQTYPE_DEVICE_TO_HOST 0xc1
185
Craig Shelley93ef1f12009-06-11 13:53:30 +0100186/* Config request codes */
187#define CP210X_IFC_ENABLE 0x00
188#define CP210X_SET_BAUDDIV 0x01
189#define CP210X_GET_BAUDDIV 0x02
190#define CP210X_SET_LINE_CTL 0x03
191#define CP210X_GET_LINE_CTL 0x04
192#define CP210X_SET_BREAK 0x05
193#define CP210X_IMM_CHAR 0x06
194#define CP210X_SET_MHS 0x07
195#define CP210X_GET_MDMSTS 0x08
196#define CP210X_SET_XON 0x09
197#define CP210X_SET_XOFF 0x0A
198#define CP210X_SET_EVENTMASK 0x0B
199#define CP210X_GET_EVENTMASK 0x0C
200#define CP210X_SET_CHAR 0x0D
201#define CP210X_GET_CHARS 0x0E
202#define CP210X_GET_PROPS 0x0F
203#define CP210X_GET_COMM_STATUS 0x10
204#define CP210X_RESET 0x11
205#define CP210X_PURGE 0x12
206#define CP210X_SET_FLOW 0x13
207#define CP210X_GET_FLOW 0x14
208#define CP210X_EMBED_EVENTS 0x15
209#define CP210X_GET_EVENTSTATE 0x16
210#define CP210X_SET_CHARS 0x19
Preston Fick7f482fc2012-01-16 18:14:09 -0600211#define CP210X_GET_BAUDRATE 0x1D
212#define CP210X_SET_BAUDRATE 0x1E
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Craig Shelley93ef1f12009-06-11 13:53:30 +0100214/* CP210X_IFC_ENABLE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215#define UART_ENABLE 0x0001
216#define UART_DISABLE 0x0000
217
Craig Shelley93ef1f12009-06-11 13:53:30 +0100218/* CP210X_(SET|GET)_BAUDDIV */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219#define BAUD_RATE_GEN_FREQ 0x384000
220
Craig Shelley93ef1f12009-06-11 13:53:30 +0100221/* CP210X_(SET|GET)_LINE_CTL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222#define BITS_DATA_MASK 0X0f00
Craig Shelley39a66b82005-05-27 00:09:56 +0100223#define BITS_DATA_5 0X0500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224#define BITS_DATA_6 0X0600
225#define BITS_DATA_7 0X0700
226#define BITS_DATA_8 0X0800
227#define BITS_DATA_9 0X0900
228
229#define BITS_PARITY_MASK 0x00f0
230#define BITS_PARITY_NONE 0x0000
231#define BITS_PARITY_ODD 0x0010
232#define BITS_PARITY_EVEN 0x0020
233#define BITS_PARITY_MARK 0x0030
234#define BITS_PARITY_SPACE 0x0040
235
236#define BITS_STOP_MASK 0x000f
237#define BITS_STOP_1 0x0000
238#define BITS_STOP_1_5 0x0001
239#define BITS_STOP_2 0x0002
Craig Shelley39a66b82005-05-27 00:09:56 +0100240
Craig Shelley93ef1f12009-06-11 13:53:30 +0100241/* CP210X_SET_BREAK */
Craig Shelley72916792010-08-18 22:13:39 +0100242#define BREAK_ON 0x0001
243#define BREAK_OFF 0x0000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Craig Shelley93ef1f12009-06-11 13:53:30 +0100245/* CP210X_(SET_MHS|GET_MDMSTS) */
Craig Shelley39a66b82005-05-27 00:09:56 +0100246#define CONTROL_DTR 0x0001
247#define CONTROL_RTS 0x0002
248#define CONTROL_CTS 0x0010
249#define CONTROL_DSR 0x0020
250#define CONTROL_RING 0x0040
251#define CONTROL_DCD 0x0080
252#define CONTROL_WRITE_DTR 0x0100
253#define CONTROL_WRITE_RTS 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Craig Shelley39a66b82005-05-27 00:09:56 +0100255/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100256 * cp210x_get_config
257 * Reads from the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100258 * 'size' is specified in bytes.
259 * 'data' is a pointer to a pre-allocated array of integers large
260 * enough to hold 'size' bytes (with 4 bytes to each integer)
261 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100262static int cp210x_get_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100263 unsigned int *data, int size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264{
265 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000266 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100267 int result, i, length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Craig Shelley39a66b82005-05-27 00:09:56 +0100269 /* Number of integers required to contain the array */
270 length = (((size - 1) | 3) + 1)/4;
271
Al Viro53ebb3b2007-02-09 16:39:55 +0000272 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100273 if (!buf) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800274 dev_err(&port->dev, "%s - out of memory.\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100275 return -ENOMEM;
276 }
277
Craig Shelley39a66b82005-05-27 00:09:56 +0100278 /* Issue the request, attempting to read 'size' bytes */
Alan Coxff7eb602008-07-22 11:10:17 +0100279 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
Craig Shelley39a66b82005-05-27 00:09:56 +0100281 0, buf, size, 300);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
Craig Shelley39a66b82005-05-27 00:09:56 +0100283 /* Convert data into an array of integers */
Alan Coxff7eb602008-07-22 11:10:17 +0100284 for (i = 0; i < length; i++)
Craig Shelley39a66b82005-05-27 00:09:56 +0100285 data[i] = le32_to_cpu(buf[i]);
286
287 kfree(buf);
288
289 if (result != size) {
Craig Shelley97324952009-02-26 22:21:51 +0000290 dbg("%s - Unable to send config request, "
Johan Hovold0b238582012-01-16 00:36:47 +0100291 "request=0x%x size=%d result=%d",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800292 __func__, request, size, result);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100293 if (result > 0)
294 result = -EPROTO;
295
296 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 }
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return 0;
300}
301
Craig Shelley39a66b82005-05-27 00:09:56 +0100302/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100303 * cp210x_set_config
304 * Writes to the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100305 * Values less than 16 bits wide are sent directly
306 * 'size' is specified in bytes.
307 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100308static int cp210x_set_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100309 unsigned int *data, int size)
310{
311 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000312 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100313 int result, i, length;
314
315 /* Number of integers required to contain the array */
316 length = (((size - 1) | 3) + 1)/4;
317
Al Viro53ebb3b2007-02-09 16:39:55 +0000318 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100319 if (!buf) {
320 dev_err(&port->dev, "%s - out of memory.\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800321 __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100322 return -ENOMEM;
323 }
324
325 /* Array of integers into bytes */
326 for (i = 0; i < length; i++)
327 buf[i] = cpu_to_le32(data[i]);
328
329 if (size > 2) {
Alan Coxff7eb602008-07-22 11:10:17 +0100330 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100331 usb_sndctrlpipe(serial->dev, 0),
332 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
333 0, buf, size, 300);
334 } else {
Alan Coxff7eb602008-07-22 11:10:17 +0100335 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100336 usb_sndctrlpipe(serial->dev, 0),
337 request, REQTYPE_HOST_TO_DEVICE, data[0],
338 0, NULL, 0, 300);
339 }
340
341 kfree(buf);
342
343 if ((size > 2 && result != size) || result < 0) {
Craig Shelley97324952009-02-26 22:21:51 +0000344 dbg("%s - Unable to send request, "
Johan Hovold0b238582012-01-16 00:36:47 +0100345 "request=0x%x size=%d result=%d",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800346 __func__, request, size, result);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100347 if (result > 0)
348 result = -EPROTO;
349
350 return result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100351 }
352
Craig Shelley39a66b82005-05-27 00:09:56 +0100353 return 0;
354}
355
356/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100357 * cp210x_set_config_single
358 * Convenience function for calling cp210x_set_config on single data values
Craig Shelley39a66b82005-05-27 00:09:56 +0100359 * without requiring an integer pointer
360 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100361static inline int cp210x_set_config_single(struct usb_serial_port *port,
Craig Shelley39a66b82005-05-27 00:09:56 +0100362 u8 request, unsigned int data)
363{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100364 return cp210x_set_config(port, request, &data, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100365}
366
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000367/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100368 * cp210x_quantise_baudrate
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000369 * Quantises the baud rate as per AN205 Table 1
370 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100371static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
Johan Hovoldbe125d92012-01-16 00:36:50 +0100372 if (baud <= 300)
373 baud = 300;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000374 else if (baud <= 600) baud = 600;
375 else if (baud <= 1200) baud = 1200;
376 else if (baud <= 1800) baud = 1800;
377 else if (baud <= 2400) baud = 2400;
378 else if (baud <= 4000) baud = 4000;
379 else if (baud <= 4803) baud = 4800;
380 else if (baud <= 7207) baud = 7200;
381 else if (baud <= 9612) baud = 9600;
382 else if (baud <= 14428) baud = 14400;
383 else if (baud <= 16062) baud = 16000;
384 else if (baud <= 19250) baud = 19200;
385 else if (baud <= 28912) baud = 28800;
386 else if (baud <= 38601) baud = 38400;
387 else if (baud <= 51558) baud = 51200;
388 else if (baud <= 56280) baud = 56000;
389 else if (baud <= 58053) baud = 57600;
390 else if (baud <= 64111) baud = 64000;
391 else if (baud <= 77608) baud = 76800;
392 else if (baud <= 117028) baud = 115200;
393 else if (baud <= 129347) baud = 128000;
394 else if (baud <= 156868) baud = 153600;
395 else if (baud <= 237832) baud = 230400;
396 else if (baud <= 254234) baud = 250000;
397 else if (baud <= 273066) baud = 256000;
398 else if (baud <= 491520) baud = 460800;
399 else if (baud <= 567138) baud = 500000;
400 else if (baud <= 670254) baud = 576000;
Johan Hovoldd1620ca2012-01-16 00:36:53 +0100401 else if (baud < 1000000)
402 baud = 921600;
403 else if (baud > 2000000)
404 baud = 2000000;
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000405 return baud;
406}
407
Alan Coxa509a7e2009-09-19 13:13:26 -0700408static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 int result;
411
Harvey Harrison441b62c2008-03-03 16:08:34 -0800412 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Johan Hovold2479e2a2011-11-10 14:58:29 +0100414 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
415 UART_ENABLE);
416 if (result) {
417 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
418 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 }
420
Craig Shelley39a66b82005-05-27 00:09:56 +0100421 /* Configure the termios structure */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100422 cp210x_get_termios(tty, port);
Johan Hovold55b2afb2012-01-16 00:36:48 +0100423
Johan Hovoldcdc32fd2012-01-16 00:36:52 +0100424 /* The baud rate must be initialised on cp2104 */
425 if (tty)
426 cp210x_change_speed(tty, port, NULL);
427
Johan Hovold55b2afb2012-01-16 00:36:48 +0100428 return usb_serial_generic_open(tty, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429}
430
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100431static void cp210x_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800433 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Johan Hovoldf26788d2010-03-17 23:00:45 +0100435 usb_serial_generic_close(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Oliver Neukum95bef012008-01-22 13:56:18 +0100437 mutex_lock(&port->serial->disc_mutex);
438 if (!port->serial->disconnected)
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100439 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
Oliver Neukum95bef012008-01-22 13:56:18 +0100440 mutex_unlock(&port->serial->disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441}
442
Craig Shelley39a66b82005-05-27 00:09:56 +0100443/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100444 * cp210x_get_termios
Craig Shelley39a66b82005-05-27 00:09:56 +0100445 * Reads the baud rate, data bits, parity, stop bits and flow control mode
446 * from the device, corrects any unsupported values, and configures the
447 * termios structure to reflect the state of the device
448 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100449static void cp210x_get_termios(struct tty_struct *tty,
VomLehnd2ad67b2009-03-12 14:37:42 -0700450 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
VomLehnd2ad67b2009-03-12 14:37:42 -0700452 unsigned int baud;
453
454 if (tty) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100455 cp210x_get_termios_port(tty->driver_data,
VomLehnd2ad67b2009-03-12 14:37:42 -0700456 &tty->termios->c_cflag, &baud);
457 tty_encode_baud_rate(tty, baud, baud);
458 }
459
460 else {
461 unsigned int cflag;
462 cflag = 0;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100463 cp210x_get_termios_port(port, &cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700464 }
465}
466
467/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100468 * cp210x_get_termios_port
469 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
VomLehnd2ad67b2009-03-12 14:37:42 -0700470 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100471static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700472 unsigned int *cflagp, unsigned int *baudp)
473{
Craig Shelley39a66b82005-05-27 00:09:56 +0100474 unsigned int cflag, modem_ctl[4];
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700475 unsigned int baud;
476 unsigned int bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Harvey Harrison441b62c2008-03-03 16:08:34 -0800478 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Preston Fick7f482fc2012-01-16 18:14:09 -0600480 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Harvey Harrison441b62c2008-03-03 16:08:34 -0800482 dbg("%s - baud rate = %d", __func__, baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700483 *baudp = baud;
Alan Cox9ab0f202007-10-18 01:24:24 -0700484
VomLehnd2ad67b2009-03-12 14:37:42 -0700485 cflag = *cflagp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100487 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 cflag &= ~CSIZE;
Alan Coxff7eb602008-07-22 11:10:17 +0100489 switch (bits & BITS_DATA_MASK) {
490 case BITS_DATA_5:
491 dbg("%s - data bits = 5", __func__);
492 cflag |= CS5;
493 break;
494 case BITS_DATA_6:
495 dbg("%s - data bits = 6", __func__);
496 cflag |= CS6;
497 break;
498 case BITS_DATA_7:
499 dbg("%s - data bits = 7", __func__);
500 cflag |= CS7;
501 break;
502 case BITS_DATA_8:
503 dbg("%s - data bits = 8", __func__);
504 cflag |= CS8;
505 break;
506 case BITS_DATA_9:
507 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
508 __func__);
509 cflag |= CS8;
510 bits &= ~BITS_DATA_MASK;
511 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100512 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100513 break;
514 default:
515 dbg("%s - Unknown number of data bits, using 8", __func__);
516 cflag |= CS8;
517 bits &= ~BITS_DATA_MASK;
518 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100519 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100520 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 }
522
Alan Coxff7eb602008-07-22 11:10:17 +0100523 switch (bits & BITS_PARITY_MASK) {
524 case BITS_PARITY_NONE:
525 dbg("%s - parity = NONE", __func__);
526 cflag &= ~PARENB;
527 break;
528 case BITS_PARITY_ODD:
529 dbg("%s - parity = ODD", __func__);
530 cflag |= (PARENB|PARODD);
531 break;
532 case BITS_PARITY_EVEN:
533 dbg("%s - parity = EVEN", __func__);
534 cflag &= ~PARODD;
535 cflag |= PARENB;
536 break;
537 case BITS_PARITY_MARK:
Roland Koebler4b6181c2011-11-09 19:37:08 +0100538 dbg("%s - parity = MARK", __func__);
539 cflag |= (PARENB|PARODD|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100540 break;
541 case BITS_PARITY_SPACE:
Roland Koebler4b6181c2011-11-09 19:37:08 +0100542 dbg("%s - parity = SPACE", __func__);
543 cflag &= ~PARODD;
544 cflag |= (PARENB|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100545 break;
546 default:
547 dbg("%s - Unknown parity mode, disabling parity", __func__);
548 cflag &= ~PARENB;
549 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100550 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100551 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 }
553
554 cflag &= ~CSTOPB;
Alan Coxff7eb602008-07-22 11:10:17 +0100555 switch (bits & BITS_STOP_MASK) {
556 case BITS_STOP_1:
557 dbg("%s - stop bits = 1", __func__);
558 break;
559 case BITS_STOP_1_5:
560 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
561 __func__);
562 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100563 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100564 break;
565 case BITS_STOP_2:
566 dbg("%s - stop bits = 2", __func__);
567 cflag |= CSTOPB;
568 break;
569 default:
570 dbg("%s - Unknown number of stop bits, using 1 stop bit",
571 __func__);
572 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100573 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100574 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 }
576
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100577 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100578 if (modem_ctl[0] & 0x0008) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800579 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100580 cflag |= CRTSCTS;
581 } else {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800582 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100583 cflag &= ~CRTSCTS;
584 }
585
VomLehnd2ad67b2009-03-12 14:37:42 -0700586 *cflagp = cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587}
588
Johan Hovolde5990872012-01-16 00:36:51 +0100589/*
590 * CP2101 supports the following baud rates:
591 *
592 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
593 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
594 *
595 * CP2102 and CP2103 support the following additional rates:
596 *
597 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
598 * 576000
599 *
600 * The device will map a requested rate to a supported one, but the result
601 * of requests for rates greater than 1053257 is undefined (see AN205).
602 *
603 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
604 * respectively, with an error less than 1%. The actual rates are determined
605 * by
606 *
607 * div = round(freq / (2 x prescale x request))
608 * actual = freq / (2 x prescale x div)
609 *
610 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
611 * or 1 otherwise.
612 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
613 * otherwise.
614 */
615static void cp210x_change_speed(struct tty_struct *tty,
616 struct usb_serial_port *port, struct ktermios *old_termios)
617{
618 u32 baud;
619
620 baud = tty->termios->c_ospeed;
621
Johan Hovoldd1620ca2012-01-16 00:36:53 +0100622 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
623 * or to an arbitrary rate in [1M,2M].
Johan Hovolde5990872012-01-16 00:36:51 +0100624 *
625 * NOTE: B0 is not implemented.
626 */
627 baud = cp210x_quantise_baudrate(baud);
628
629 dbg("%s - setting baud rate to %u", __func__, baud);
630 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
631 sizeof(baud))) {
632 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
633 if (old_termios)
634 baud = old_termios->c_ospeed;
635 else
636 baud = 9600;
637 }
638
639 tty_encode_baud_rate(tty, baud, baud);
640}
641
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100642static void cp210x_set_termios(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100643 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644{
Alan Cox9ab0f202007-10-18 01:24:24 -0700645 unsigned int cflag, old_cflag;
Johan Hovold34b76fc2012-01-16 00:36:49 +0100646 unsigned int bits;
Craig Shelley39a66b82005-05-27 00:09:56 +0100647 unsigned int modem_ctl[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
Harvey Harrison441b62c2008-03-03 16:08:34 -0800649 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
Alan Cox95da3102008-07-22 11:09:07 +0100651 if (!tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 return;
Alan Cox9ab0f202007-10-18 01:24:24 -0700653
Alan Cox95da3102008-07-22 11:09:07 +0100654 cflag = tty->termios->c_cflag;
Alan Cox01e96d22007-07-26 18:54:12 +0100655 old_cflag = old_termios->c_cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
Johan Hovolde5990872012-01-16 00:36:51 +0100657 if (tty->termios->c_ospeed != old_termios->c_ospeed)
658 cp210x_change_speed(tty, port, old_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659
Craig Shelley39a66b82005-05-27 00:09:56 +0100660 /* If the number of data bits is to be updated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100662 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 bits &= ~BITS_DATA_MASK;
664 switch (cflag & CSIZE) {
Alan Coxff7eb602008-07-22 11:10:17 +0100665 case CS5:
666 bits |= BITS_DATA_5;
667 dbg("%s - data bits = 5", __func__);
668 break;
669 case CS6:
670 bits |= BITS_DATA_6;
671 dbg("%s - data bits = 6", __func__);
672 break;
673 case CS7:
674 bits |= BITS_DATA_7;
675 dbg("%s - data bits = 7", __func__);
676 break;
677 case CS8:
678 bits |= BITS_DATA_8;
679 dbg("%s - data bits = 8", __func__);
680 break;
681 /*case CS9:
682 bits |= BITS_DATA_9;
683 dbg("%s - data bits = 9", __func__);
684 break;*/
685 default:
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100686 dbg("cp210x driver does not "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 "support the number of bits requested,"
Johan Hovold0b238582012-01-16 00:36:47 +0100688 " using 8 bit mode");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 bits |= BITS_DATA_8;
690 break;
691 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100692 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000693 dbg("Number of data bits requested "
Johan Hovold0b238582012-01-16 00:36:47 +0100694 "not supported by device");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 }
696
Roland Koebler4b6181c2011-11-09 19:37:08 +0100697 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
698 (old_cflag & (PARENB|PARODD|CMSPAR))) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100699 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 bits &= ~BITS_PARITY_MASK;
701 if (cflag & PARENB) {
Roland Koebler4b6181c2011-11-09 19:37:08 +0100702 if (cflag & CMSPAR) {
703 if (cflag & PARODD) {
704 bits |= BITS_PARITY_MARK;
705 dbg("%s - parity = MARK", __func__);
706 } else {
707 bits |= BITS_PARITY_SPACE;
708 dbg("%s - parity = SPACE", __func__);
709 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 } else {
Roland Koebler4b6181c2011-11-09 19:37:08 +0100711 if (cflag & PARODD) {
712 bits |= BITS_PARITY_ODD;
713 dbg("%s - parity = ODD", __func__);
714 } else {
715 bits |= BITS_PARITY_EVEN;
716 dbg("%s - parity = EVEN", __func__);
717 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 }
719 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100720 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Johan Hovold0b238582012-01-16 00:36:47 +0100721 dbg("Parity mode not supported by device");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 }
723
724 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100725 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 bits &= ~BITS_STOP_MASK;
727 if (cflag & CSTOPB) {
728 bits |= BITS_STOP_2;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800729 dbg("%s - stop bits = 2", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 } else {
731 bits |= BITS_STOP_1;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800732 dbg("%s - stop bits = 1", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100734 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000735 dbg("Number of stop bits requested "
Johan Hovold0b238582012-01-16 00:36:47 +0100736 "not supported by device");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100738
739 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100740 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100741 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800742 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100743 modem_ctl[2], modem_ctl[3]);
744
745 if (cflag & CRTSCTS) {
746 modem_ctl[0] &= ~0x7B;
747 modem_ctl[0] |= 0x09;
748 modem_ctl[1] = 0x80;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800749 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100750 } else {
751 modem_ctl[0] &= ~0x7B;
752 modem_ctl[0] |= 0x01;
753 modem_ctl[1] |= 0x40;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800754 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100755 }
756
757 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800758 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100759 modem_ctl[2], modem_ctl[3]);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100760 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100761 }
762
763}
764
Alan Cox20b9d172011-02-14 16:26:50 +0000765static int cp210x_tiocmset (struct tty_struct *tty,
Craig Shelley39a66b82005-05-27 00:09:56 +0100766 unsigned int set, unsigned int clear)
767{
Alan Cox95da3102008-07-22 11:09:07 +0100768 struct usb_serial_port *port = tty->driver_data;
Alan Cox20b9d172011-02-14 16:26:50 +0000769 return cp210x_tiocmset_port(port, set, clear);
VomLehnd2ad67b2009-03-12 14:37:42 -0700770}
771
Alan Cox20b9d172011-02-14 16:26:50 +0000772static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700773 unsigned int set, unsigned int clear)
774{
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700775 unsigned int control = 0;
Craig Shelley39a66b82005-05-27 00:09:56 +0100776
Harvey Harrison441b62c2008-03-03 16:08:34 -0800777 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100778
779 if (set & TIOCM_RTS) {
780 control |= CONTROL_RTS;
781 control |= CONTROL_WRITE_RTS;
782 }
783 if (set & TIOCM_DTR) {
784 control |= CONTROL_DTR;
785 control |= CONTROL_WRITE_DTR;
786 }
787 if (clear & TIOCM_RTS) {
788 control &= ~CONTROL_RTS;
789 control |= CONTROL_WRITE_RTS;
790 }
791 if (clear & TIOCM_DTR) {
792 control &= ~CONTROL_DTR;
793 control |= CONTROL_WRITE_DTR;
794 }
795
Harvey Harrison441b62c2008-03-03 16:08:34 -0800796 dbg("%s - control = 0x%.4x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100797
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100798 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100799}
800
Alan Coxd94c7bd2009-10-28 21:12:33 +0100801static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
802{
803 if (on)
Alan Cox20b9d172011-02-14 16:26:50 +0000804 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100805 else
Alan Cox20b9d172011-02-14 16:26:50 +0000806 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100807}
808
Alan Cox60b33c12011-02-14 16:26:14 +0000809static int cp210x_tiocmget (struct tty_struct *tty)
Craig Shelley39a66b82005-05-27 00:09:56 +0100810{
Alan Cox95da3102008-07-22 11:09:07 +0100811 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700812 unsigned int control;
813 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100814
Harvey Harrison441b62c2008-03-03 16:08:34 -0800815 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100816
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100817 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
Craig Shelley39a66b82005-05-27 00:09:56 +0100818
819 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
820 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
821 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
822 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
823 |((control & CONTROL_RING)? TIOCM_RI : 0)
824 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
825
Harvey Harrison441b62c2008-03-03 16:08:34 -0800826 dbg("%s - control = 0x%.2x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100827
828 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829}
830
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100831static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832{
Alan Cox95da3102008-07-22 11:09:07 +0100833 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700834 unsigned int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
Harvey Harrison441b62c2008-03-03 16:08:34 -0800836 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 if (break_state == 0)
838 state = BREAK_OFF;
839 else
840 state = BREAK_ON;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800841 dbg("%s - turning break %s", __func__,
Alan Coxff7eb602008-07-22 11:10:17 +0100842 state == BREAK_OFF ? "off" : "on");
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100843 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844}
845
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100846static int cp210x_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100848 /* cp210x buffers behave strangely unless device is reset */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 usb_reset_device(serial->dev);
850 return 0;
851}
852
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100853static int __init cp210x_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854{
855 int retval;
856
Alan Stern08a4f6b2012-02-23 14:56:17 -0500857 retval = usb_serial_register_drivers(&cp210x_driver, serial_drivers);
858 if (retval == 0)
859 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
860 DRIVER_DESC "\n");
861 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862}
863
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100864static void __exit cp210x_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865{
Alan Stern08a4f6b2012-02-23 14:56:17 -0500866 usb_serial_deregister_drivers(&cp210x_driver, serial_drivers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867}
868
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100869module_init(cp210x_init);
870module_exit(cp210x_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872MODULE_DESCRIPTION(DRIVER_DESC);
873MODULE_VERSION(DRIVER_VERSION);
874MODULE_LICENSE("GPL");
875
876module_param(debug, bool, S_IRUGO | S_IWUSR);
877MODULE_PARM_DESC(debug, "Enable verbose debugging messages");