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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);
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*);
Alan Cox60b33c12011-02-14 16:26:14 +000044static int cp210x_tiocmget(struct tty_struct *);
Alan Cox20b9d172011-02-14 16:26:50 +000045static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
46static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -070047 unsigned int, unsigned int);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010048static void cp210x_break_ctl(struct tty_struct *, int);
49static int cp210x_startup(struct usb_serial *);
Alan Coxd94c7bd2009-10-28 21:12:33 +010050static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Rusty Russell90ab5ee2012-01-13 09:32:20 +103052static bool debug;
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Németh Márton7d40d7e2010-01-10 15:34:24 +010054static const struct usb_device_id id_table[] = {
DJ Delorie2f1136d2010-09-17 11:09:06 -040055 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
M Kondrin5091b582008-11-14 13:02:45 +030056 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
Craig Shelley59fba742008-04-12 16:15:54 +010057 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
A E Lawrence5b22a322010-08-29 21:51:52 +010058 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010059 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
Edouard Lafargue1f4f7142007-09-25 10:15:36 +020060 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010061 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
Craig Shelleyeefd9022010-05-15 13:36:38 +010062 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
63 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
Craig Shelley198b9512005-08-28 09:51:15 +010064 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
Martin Kusserow014840e2007-12-21 12:02:17 +010065 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
Craig Shelley59fba742008-04-12 16:15:54 +010066 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
Craig Shelley198b9512005-08-28 09:51:15 +010067 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000068 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
69 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +010070 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
Amit Kucheria0601e112009-07-06 14:19:59 +030071 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
72 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +000073 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
Craig Shelley59224f52006-03-11 11:29:02 +000074 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
Craig Shelleyeefd9022010-05-15 13:36:38 +010075 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
76 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
Craig Shelley92f5cae22007-04-20 14:37:17 +010077 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
Damir N Abdullin9a18e752008-10-30 13:52:38 -070078 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
Vitja Makarov212a4b42006-05-31 00:40:06 +040079 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
Craig Shelleyeefd9022010-05-15 13:36:38 +010080 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000081 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
Craig Shelley92f5cae22007-04-20 14:37:17 +010083 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +000084 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
Craig Shelleyba0f3322008-09-04 21:28:21 +010085 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
Craig Shelleye988fc82006-01-20 00:06:19 +000086 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
Craig Shelley8bf16ba2009-07-12 21:52:33 +010087 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
Jon K Hellanfc4bd642007-02-28 23:04:33 +010088 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
Jason Detring0bf7a812010-08-26 15:08:54 -050090 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000091 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
Craig Shelleyeefd9022010-05-15 13:36:38 +010092 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
Robert M. Kenneyc6535662009-02-26 14:58:39 -050093 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
Bernhard Beck966236972008-05-11 09:23:13 -070094 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
Malte Schröder08e87d02012-01-05 20:34:40 +010095 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
Craig Shelley59fba742008-04-12 16:15:54 +010096 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
Craig Shelleyeefd9022010-05-15 13:36:38 +010097 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
Bjorn Schneider78001e32006-10-28 12:42:04 +020098 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
99 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
Jeff Long8be27c22007-11-28 11:02:09 -0500100 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
Alan Coxbd07c552010-02-08 10:10:44 +0000101 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100102 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200103 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
Tomasz K877e2622009-01-04 12:47:11 +0100104 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300105 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
Florian Fainellic851e832011-05-10 11:17:33 +0200106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100107 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
Craig Shelleyba0f3322008-09-04 21:28:21 +0100108 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100109 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
Craig Shelley881e3c92008-11-09 20:17:54 +0000110 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000111 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100112 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000113 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
Alex Stephensd23bac92009-03-17 00:06:19 +0000114 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
Craig Shelley541e05e2010-08-23 20:50:57 +0100115 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
Craig Shelley4eff0b42011-03-20 13:51:13 +0000116 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
117 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
118 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
119 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
Craig Shelleye988fc82006-01-20 00:06:19 +0000120 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
Craig Shelley61926b92006-10-12 22:09:56 +0100121 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100122 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000123 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
124 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
125 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
126 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
Pozsar Balazsebaf4942007-02-16 12:47:49 +0100127 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100128 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
Johannes Hoelzle05998d2006-12-02 16:54:27 +0100129 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100130 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000131 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
Josef Balatkab0ce84d2005-11-17 09:47:24 -0800132 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
Alessio Igor Bogani356c5a42010-07-27 23:05:14 +0200133 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
134 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
135 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
136 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
Craig Shelley541e05e2010-08-23 20:50:57 +0100137 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
138 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
139 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
Anders Larsen93ad03d2010-10-06 23:46:25 +0200140 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
Renato Caldas791b7d72012-01-06 15:20:51 +0000141 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
Craig Shelley541e05e2010-08-23 20:50:57 +0100142 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
Craig Shelley39a66b82005-05-27 00:09:56 +0100143 { } /* Terminating Entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144};
145
Alan Coxff7eb602008-07-22 11:10:17 +0100146MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100148static struct usb_driver cp210x_driver = {
149 .name = "cp210x",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 .probe = usb_serial_probe,
151 .disconnect = usb_serial_disconnect,
152 .id_table = id_table,
Greg Kroah-Hartmanba9dc652005-11-16 13:41:28 -0800153 .no_dynamic_id = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154};
155
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100156static struct usb_serial_driver cp210x_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700157 .driver = {
158 .owner = THIS_MODULE,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100159 .name = "cp210x",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700160 },
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100161 .usb_driver = &cp210x_driver,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 .num_ports = 1,
Johan Hovoldaea006b2010-03-17 23:00:39 +0100164 .bulk_in_size = 256,
Johan Hovoldd4e598f2010-03-17 23:00:38 +0100165 .bulk_out_size = 256,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100166 .open = cp210x_open,
167 .close = cp210x_close,
168 .break_ctl = cp210x_break_ctl,
169 .set_termios = cp210x_set_termios,
170 .tiocmget = cp210x_tiocmget,
171 .tiocmset = cp210x_tiocmset,
172 .attach = cp210x_startup,
Libor Pechacekd14fc1a2011-01-14 14:30:21 +0100173 .dtr_rts = cp210x_dtr_rts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174};
175
Craig Shelley39a66b82005-05-27 00:09:56 +0100176/* Config request types */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177#define REQTYPE_HOST_TO_DEVICE 0x41
178#define REQTYPE_DEVICE_TO_HOST 0xc1
179
Craig Shelley93ef1f12009-06-11 13:53:30 +0100180/* Config request codes */
181#define CP210X_IFC_ENABLE 0x00
182#define CP210X_SET_BAUDDIV 0x01
183#define CP210X_GET_BAUDDIV 0x02
184#define CP210X_SET_LINE_CTL 0x03
185#define CP210X_GET_LINE_CTL 0x04
186#define CP210X_SET_BREAK 0x05
187#define CP210X_IMM_CHAR 0x06
188#define CP210X_SET_MHS 0x07
189#define CP210X_GET_MDMSTS 0x08
190#define CP210X_SET_XON 0x09
191#define CP210X_SET_XOFF 0x0A
192#define CP210X_SET_EVENTMASK 0x0B
193#define CP210X_GET_EVENTMASK 0x0C
194#define CP210X_SET_CHAR 0x0D
195#define CP210X_GET_CHARS 0x0E
196#define CP210X_GET_PROPS 0x0F
197#define CP210X_GET_COMM_STATUS 0x10
198#define CP210X_RESET 0x11
199#define CP210X_PURGE 0x12
200#define CP210X_SET_FLOW 0x13
201#define CP210X_GET_FLOW 0x14
202#define CP210X_EMBED_EVENTS 0x15
203#define CP210X_GET_EVENTSTATE 0x16
204#define CP210X_SET_CHARS 0x19
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
Craig Shelley93ef1f12009-06-11 13:53:30 +0100206/* CP210X_IFC_ENABLE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207#define UART_ENABLE 0x0001
208#define UART_DISABLE 0x0000
209
Craig Shelley93ef1f12009-06-11 13:53:30 +0100210/* CP210X_(SET|GET)_BAUDDIV */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211#define BAUD_RATE_GEN_FREQ 0x384000
212
Craig Shelley93ef1f12009-06-11 13:53:30 +0100213/* CP210X_(SET|GET)_LINE_CTL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214#define BITS_DATA_MASK 0X0f00
Craig Shelley39a66b82005-05-27 00:09:56 +0100215#define BITS_DATA_5 0X0500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216#define BITS_DATA_6 0X0600
217#define BITS_DATA_7 0X0700
218#define BITS_DATA_8 0X0800
219#define BITS_DATA_9 0X0900
220
221#define BITS_PARITY_MASK 0x00f0
222#define BITS_PARITY_NONE 0x0000
223#define BITS_PARITY_ODD 0x0010
224#define BITS_PARITY_EVEN 0x0020
225#define BITS_PARITY_MARK 0x0030
226#define BITS_PARITY_SPACE 0x0040
227
228#define BITS_STOP_MASK 0x000f
229#define BITS_STOP_1 0x0000
230#define BITS_STOP_1_5 0x0001
231#define BITS_STOP_2 0x0002
Craig Shelley39a66b82005-05-27 00:09:56 +0100232
Craig Shelley93ef1f12009-06-11 13:53:30 +0100233/* CP210X_SET_BREAK */
Craig Shelley72916792010-08-18 22:13:39 +0100234#define BREAK_ON 0x0001
235#define BREAK_OFF 0x0000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Craig Shelley93ef1f12009-06-11 13:53:30 +0100237/* CP210X_(SET_MHS|GET_MDMSTS) */
Craig Shelley39a66b82005-05-27 00:09:56 +0100238#define CONTROL_DTR 0x0001
239#define CONTROL_RTS 0x0002
240#define CONTROL_CTS 0x0010
241#define CONTROL_DSR 0x0020
242#define CONTROL_RING 0x0040
243#define CONTROL_DCD 0x0080
244#define CONTROL_WRITE_DTR 0x0100
245#define CONTROL_WRITE_RTS 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Craig Shelley39a66b82005-05-27 00:09:56 +0100247/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100248 * cp210x_get_config
249 * Reads from the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100250 * 'size' is specified in bytes.
251 * 'data' is a pointer to a pre-allocated array of integers large
252 * enough to hold 'size' bytes (with 4 bytes to each integer)
253 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100254static int cp210x_get_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100255 unsigned int *data, int size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
257 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000258 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100259 int result, i, length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Craig Shelley39a66b82005-05-27 00:09:56 +0100261 /* Number of integers required to contain the array */
262 length = (((size - 1) | 3) + 1)/4;
263
Al Viro53ebb3b2007-02-09 16:39:55 +0000264 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100265 if (!buf) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800266 dev_err(&port->dev, "%s - out of memory.\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100267 return -ENOMEM;
268 }
269
Craig Shelley39a66b82005-05-27 00:09:56 +0100270 /* Issue the request, attempting to read 'size' bytes */
Alan Coxff7eb602008-07-22 11:10:17 +0100271 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
Craig Shelley39a66b82005-05-27 00:09:56 +0100273 0, buf, size, 300);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Craig Shelley39a66b82005-05-27 00:09:56 +0100275 /* Convert data into an array of integers */
Alan Coxff7eb602008-07-22 11:10:17 +0100276 for (i = 0; i < length; i++)
Craig Shelley39a66b82005-05-27 00:09:56 +0100277 data[i] = le32_to_cpu(buf[i]);
278
279 kfree(buf);
280
281 if (result != size) {
Craig Shelley97324952009-02-26 22:21:51 +0000282 dbg("%s - Unable to send config request, "
Craig Shelley39a66b82005-05-27 00:09:56 +0100283 "request=0x%x size=%d result=%d\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800284 __func__, request, size, result);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100285 if (result > 0)
286 result = -EPROTO;
287
288 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 }
290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 return 0;
292}
293
Craig Shelley39a66b82005-05-27 00:09:56 +0100294/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100295 * cp210x_set_config
296 * Writes to the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100297 * Values less than 16 bits wide are sent directly
298 * 'size' is specified in bytes.
299 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100300static int cp210x_set_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100301 unsigned int *data, int size)
302{
303 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000304 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100305 int result, i, length;
306
307 /* Number of integers required to contain the array */
308 length = (((size - 1) | 3) + 1)/4;
309
Al Viro53ebb3b2007-02-09 16:39:55 +0000310 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100311 if (!buf) {
312 dev_err(&port->dev, "%s - out of memory.\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800313 __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100314 return -ENOMEM;
315 }
316
317 /* Array of integers into bytes */
318 for (i = 0; i < length; i++)
319 buf[i] = cpu_to_le32(data[i]);
320
321 if (size > 2) {
Alan Coxff7eb602008-07-22 11:10:17 +0100322 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100323 usb_sndctrlpipe(serial->dev, 0),
324 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
325 0, buf, size, 300);
326 } else {
Alan Coxff7eb602008-07-22 11:10:17 +0100327 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100328 usb_sndctrlpipe(serial->dev, 0),
329 request, REQTYPE_HOST_TO_DEVICE, data[0],
330 0, NULL, 0, 300);
331 }
332
333 kfree(buf);
334
335 if ((size > 2 && result != size) || result < 0) {
Craig Shelley97324952009-02-26 22:21:51 +0000336 dbg("%s - Unable to send request, "
Craig Shelley39a66b82005-05-27 00:09:56 +0100337 "request=0x%x size=%d result=%d\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800338 __func__, request, size, result);
Johan Hovold2479e2a2011-11-10 14:58:29 +0100339 if (result > 0)
340 result = -EPROTO;
341
342 return result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100343 }
344
Craig Shelley39a66b82005-05-27 00:09:56 +0100345 return 0;
346}
347
348/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100349 * cp210x_set_config_single
350 * Convenience function for calling cp210x_set_config on single data values
Craig Shelley39a66b82005-05-27 00:09:56 +0100351 * without requiring an integer pointer
352 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100353static inline int cp210x_set_config_single(struct usb_serial_port *port,
Craig Shelley39a66b82005-05-27 00:09:56 +0100354 u8 request, unsigned int data)
355{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100356 return cp210x_set_config(port, request, &data, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100357}
358
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000359/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100360 * cp210x_quantise_baudrate
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000361 * Quantises the baud rate as per AN205 Table 1
362 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100363static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000364 if (baud <= 56) baud = 0;
365 else if (baud <= 300) baud = 300;
366 else if (baud <= 600) baud = 600;
367 else if (baud <= 1200) baud = 1200;
368 else if (baud <= 1800) baud = 1800;
369 else if (baud <= 2400) baud = 2400;
370 else if (baud <= 4000) baud = 4000;
371 else if (baud <= 4803) baud = 4800;
372 else if (baud <= 7207) baud = 7200;
373 else if (baud <= 9612) baud = 9600;
374 else if (baud <= 14428) baud = 14400;
375 else if (baud <= 16062) baud = 16000;
376 else if (baud <= 19250) baud = 19200;
377 else if (baud <= 28912) baud = 28800;
378 else if (baud <= 38601) baud = 38400;
379 else if (baud <= 51558) baud = 51200;
380 else if (baud <= 56280) baud = 56000;
381 else if (baud <= 58053) baud = 57600;
382 else if (baud <= 64111) baud = 64000;
383 else if (baud <= 77608) baud = 76800;
384 else if (baud <= 117028) baud = 115200;
385 else if (baud <= 129347) baud = 128000;
386 else if (baud <= 156868) baud = 153600;
387 else if (baud <= 237832) baud = 230400;
388 else if (baud <= 254234) baud = 250000;
389 else if (baud <= 273066) baud = 256000;
390 else if (baud <= 491520) baud = 460800;
391 else if (baud <= 567138) baud = 500000;
392 else if (baud <= 670254) baud = 576000;
393 else if (baud <= 1053257) baud = 921600;
394 else if (baud <= 1474560) baud = 1228800;
395 else if (baud <= 2457600) baud = 1843200;
396 else baud = 3686400;
397 return baud;
398}
399
Alan Coxa509a7e2009-09-19 13:13:26 -0700400static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 int result;
403
Harvey Harrison441b62c2008-03-03 16:08:34 -0800404 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Johan Hovold2479e2a2011-11-10 14:58:29 +0100406 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
407 UART_ENABLE);
408 if (result) {
409 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
410 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 }
412
Johan Hovolda9013172010-05-15 17:53:50 +0200413 result = usb_serial_generic_open(tty, port);
Johan Hovold2db6c762010-03-17 23:05:55 +0100414 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Craig Shelley39a66b82005-05-27 00:09:56 +0100417 /* Configure the termios structure */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100418 cp210x_get_termios(tty, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 return 0;
420}
421
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100422static void cp210x_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800424 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Johan Hovoldf26788d2010-03-17 23:00:45 +0100426 usb_serial_generic_close(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Oliver Neukum95bef012008-01-22 13:56:18 +0100428 mutex_lock(&port->serial->disc_mutex);
429 if (!port->serial->disconnected)
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100430 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
Oliver Neukum95bef012008-01-22 13:56:18 +0100431 mutex_unlock(&port->serial->disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432}
433
Craig Shelley39a66b82005-05-27 00:09:56 +0100434/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100435 * cp210x_get_termios
Craig Shelley39a66b82005-05-27 00:09:56 +0100436 * Reads the baud rate, data bits, parity, stop bits and flow control mode
437 * from the device, corrects any unsupported values, and configures the
438 * termios structure to reflect the state of the device
439 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100440static void cp210x_get_termios(struct tty_struct *tty,
VomLehnd2ad67b2009-03-12 14:37:42 -0700441 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442{
VomLehnd2ad67b2009-03-12 14:37:42 -0700443 unsigned int baud;
444
445 if (tty) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100446 cp210x_get_termios_port(tty->driver_data,
VomLehnd2ad67b2009-03-12 14:37:42 -0700447 &tty->termios->c_cflag, &baud);
448 tty_encode_baud_rate(tty, baud, baud);
449 }
450
451 else {
452 unsigned int cflag;
453 cflag = 0;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100454 cp210x_get_termios_port(port, &cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700455 }
456}
457
458/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100459 * cp210x_get_termios_port
460 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
VomLehnd2ad67b2009-03-12 14:37:42 -0700461 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100462static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700463 unsigned int *cflagp, unsigned int *baudp)
464{
Craig Shelley39a66b82005-05-27 00:09:56 +0100465 unsigned int cflag, modem_ctl[4];
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700466 unsigned int baud;
467 unsigned int bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
Harvey Harrison441b62c2008-03-03 16:08:34 -0800469 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100471 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100472 /* Convert to baudrate */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 if (baud)
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100474 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Harvey Harrison441b62c2008-03-03 16:08:34 -0800476 dbg("%s - baud rate = %d", __func__, baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700477 *baudp = baud;
Alan Cox9ab0f202007-10-18 01:24:24 -0700478
VomLehnd2ad67b2009-03-12 14:37:42 -0700479 cflag = *cflagp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100481 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 cflag &= ~CSIZE;
Alan Coxff7eb602008-07-22 11:10:17 +0100483 switch (bits & BITS_DATA_MASK) {
484 case BITS_DATA_5:
485 dbg("%s - data bits = 5", __func__);
486 cflag |= CS5;
487 break;
488 case BITS_DATA_6:
489 dbg("%s - data bits = 6", __func__);
490 cflag |= CS6;
491 break;
492 case BITS_DATA_7:
493 dbg("%s - data bits = 7", __func__);
494 cflag |= CS7;
495 break;
496 case BITS_DATA_8:
497 dbg("%s - data bits = 8", __func__);
498 cflag |= CS8;
499 break;
500 case BITS_DATA_9:
501 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
502 __func__);
503 cflag |= CS8;
504 bits &= ~BITS_DATA_MASK;
505 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100506 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100507 break;
508 default:
509 dbg("%s - Unknown number of data bits, using 8", __func__);
510 cflag |= CS8;
511 bits &= ~BITS_DATA_MASK;
512 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100513 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100514 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 }
516
Alan Coxff7eb602008-07-22 11:10:17 +0100517 switch (bits & BITS_PARITY_MASK) {
518 case BITS_PARITY_NONE:
519 dbg("%s - parity = NONE", __func__);
520 cflag &= ~PARENB;
521 break;
522 case BITS_PARITY_ODD:
523 dbg("%s - parity = ODD", __func__);
524 cflag |= (PARENB|PARODD);
525 break;
526 case BITS_PARITY_EVEN:
527 dbg("%s - parity = EVEN", __func__);
528 cflag &= ~PARODD;
529 cflag |= PARENB;
530 break;
531 case BITS_PARITY_MARK:
Roland Koebler4b6181c2011-11-09 19:37:08 +0100532 dbg("%s - parity = MARK", __func__);
533 cflag |= (PARENB|PARODD|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100534 break;
535 case BITS_PARITY_SPACE:
Roland Koebler4b6181c2011-11-09 19:37:08 +0100536 dbg("%s - parity = SPACE", __func__);
537 cflag &= ~PARODD;
538 cflag |= (PARENB|CMSPAR);
Alan Coxff7eb602008-07-22 11:10:17 +0100539 break;
540 default:
541 dbg("%s - Unknown parity mode, disabling parity", __func__);
542 cflag &= ~PARENB;
543 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100544 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100545 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 }
547
548 cflag &= ~CSTOPB;
Alan Coxff7eb602008-07-22 11:10:17 +0100549 switch (bits & BITS_STOP_MASK) {
550 case BITS_STOP_1:
551 dbg("%s - stop bits = 1", __func__);
552 break;
553 case BITS_STOP_1_5:
554 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
555 __func__);
556 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100557 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100558 break;
559 case BITS_STOP_2:
560 dbg("%s - stop bits = 2", __func__);
561 cflag |= CSTOPB;
562 break;
563 default:
564 dbg("%s - Unknown number of stop bits, using 1 stop bit",
565 __func__);
566 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100567 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100568 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 }
570
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100571 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100572 if (modem_ctl[0] & 0x0008) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800573 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100574 cflag |= CRTSCTS;
575 } else {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800576 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100577 cflag &= ~CRTSCTS;
578 }
579
VomLehnd2ad67b2009-03-12 14:37:42 -0700580 *cflagp = cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581}
582
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100583static void cp210x_set_termios(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100584 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585{
Alan Cox9ab0f202007-10-18 01:24:24 -0700586 unsigned int cflag, old_cflag;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700587 unsigned int baud = 0, bits;
Craig Shelley39a66b82005-05-27 00:09:56 +0100588 unsigned int modem_ctl[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
Harvey Harrison441b62c2008-03-03 16:08:34 -0800590 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Alan Cox95da3102008-07-22 11:09:07 +0100592 if (!tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 return;
Alan Cox9ab0f202007-10-18 01:24:24 -0700594
Alan Cox95da3102008-07-22 11:09:07 +0100595 cflag = tty->termios->c_cflag;
Alan Cox01e96d22007-07-26 18:54:12 +0100596 old_cflag = old_termios->c_cflag;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100597 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
599 /* If the baud rate is to be updated*/
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000600 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
601 dbg("%s - Setting baud rate to %d baud", __func__,
602 baud);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100603 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000604 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
Joe Perches759f3632010-02-05 16:50:08 -0800605 dbg("Baud rate requested not supported by device");
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000606 baud = tty_termios_baud_rate(old_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 }
608 }
Alan Cox9ab0f202007-10-18 01:24:24 -0700609 /* Report back the resulting baud rate */
Alan Cox95da3102008-07-22 11:09:07 +0100610 tty_encode_baud_rate(tty, baud, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611
Craig Shelley39a66b82005-05-27 00:09:56 +0100612 /* If the number of data bits is to be updated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100614 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 bits &= ~BITS_DATA_MASK;
616 switch (cflag & CSIZE) {
Alan Coxff7eb602008-07-22 11:10:17 +0100617 case CS5:
618 bits |= BITS_DATA_5;
619 dbg("%s - data bits = 5", __func__);
620 break;
621 case CS6:
622 bits |= BITS_DATA_6;
623 dbg("%s - data bits = 6", __func__);
624 break;
625 case CS7:
626 bits |= BITS_DATA_7;
627 dbg("%s - data bits = 7", __func__);
628 break;
629 case CS8:
630 bits |= BITS_DATA_8;
631 dbg("%s - data bits = 8", __func__);
632 break;
633 /*case CS9:
634 bits |= BITS_DATA_9;
635 dbg("%s - data bits = 9", __func__);
636 break;*/
637 default:
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100638 dbg("cp210x driver does not "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 "support the number of bits requested,"
640 " using 8 bit mode\n");
641 bits |= BITS_DATA_8;
642 break;
643 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100644 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000645 dbg("Number of data bits requested "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 "not supported by device\n");
647 }
648
Roland Koebler4b6181c2011-11-09 19:37:08 +0100649 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
650 (old_cflag & (PARENB|PARODD|CMSPAR))) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100651 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 bits &= ~BITS_PARITY_MASK;
653 if (cflag & PARENB) {
Roland Koebler4b6181c2011-11-09 19:37:08 +0100654 if (cflag & CMSPAR) {
655 if (cflag & PARODD) {
656 bits |= BITS_PARITY_MARK;
657 dbg("%s - parity = MARK", __func__);
658 } else {
659 bits |= BITS_PARITY_SPACE;
660 dbg("%s - parity = SPACE", __func__);
661 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 } else {
Roland Koebler4b6181c2011-11-09 19:37:08 +0100663 if (cflag & PARODD) {
664 bits |= BITS_PARITY_ODD;
665 dbg("%s - parity = ODD", __func__);
666 } else {
667 bits |= BITS_PARITY_EVEN;
668 dbg("%s - parity = EVEN", __func__);
669 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 }
671 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100672 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000673 dbg("Parity mode not supported "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 "by device\n");
675 }
676
677 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100678 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 bits &= ~BITS_STOP_MASK;
680 if (cflag & CSTOPB) {
681 bits |= BITS_STOP_2;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800682 dbg("%s - stop bits = 2", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 } else {
684 bits |= BITS_STOP_1;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800685 dbg("%s - stop bits = 1", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100687 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000688 dbg("Number of stop bits requested "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 "not supported by device\n");
690 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100691
692 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100693 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100694 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800695 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100696 modem_ctl[2], modem_ctl[3]);
697
698 if (cflag & CRTSCTS) {
699 modem_ctl[0] &= ~0x7B;
700 modem_ctl[0] |= 0x09;
701 modem_ctl[1] = 0x80;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800702 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100703 } else {
704 modem_ctl[0] &= ~0x7B;
705 modem_ctl[0] |= 0x01;
706 modem_ctl[1] |= 0x40;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800707 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100708 }
709
710 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800711 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100712 modem_ctl[2], modem_ctl[3]);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100713 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100714 }
715
716}
717
Alan Cox20b9d172011-02-14 16:26:50 +0000718static int cp210x_tiocmset (struct tty_struct *tty,
Craig Shelley39a66b82005-05-27 00:09:56 +0100719 unsigned int set, unsigned int clear)
720{
Alan Cox95da3102008-07-22 11:09:07 +0100721 struct usb_serial_port *port = tty->driver_data;
Alan Cox20b9d172011-02-14 16:26:50 +0000722 return cp210x_tiocmset_port(port, set, clear);
VomLehnd2ad67b2009-03-12 14:37:42 -0700723}
724
Alan Cox20b9d172011-02-14 16:26:50 +0000725static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700726 unsigned int set, unsigned int clear)
727{
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700728 unsigned int control = 0;
Craig Shelley39a66b82005-05-27 00:09:56 +0100729
Harvey Harrison441b62c2008-03-03 16:08:34 -0800730 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100731
732 if (set & TIOCM_RTS) {
733 control |= CONTROL_RTS;
734 control |= CONTROL_WRITE_RTS;
735 }
736 if (set & TIOCM_DTR) {
737 control |= CONTROL_DTR;
738 control |= CONTROL_WRITE_DTR;
739 }
740 if (clear & TIOCM_RTS) {
741 control &= ~CONTROL_RTS;
742 control |= CONTROL_WRITE_RTS;
743 }
744 if (clear & TIOCM_DTR) {
745 control &= ~CONTROL_DTR;
746 control |= CONTROL_WRITE_DTR;
747 }
748
Harvey Harrison441b62c2008-03-03 16:08:34 -0800749 dbg("%s - control = 0x%.4x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100750
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100751 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100752}
753
Alan Coxd94c7bd2009-10-28 21:12:33 +0100754static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
755{
756 if (on)
Alan Cox20b9d172011-02-14 16:26:50 +0000757 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100758 else
Alan Cox20b9d172011-02-14 16:26:50 +0000759 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100760}
761
Alan Cox60b33c12011-02-14 16:26:14 +0000762static int cp210x_tiocmget (struct tty_struct *tty)
Craig Shelley39a66b82005-05-27 00:09:56 +0100763{
Alan Cox95da3102008-07-22 11:09:07 +0100764 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700765 unsigned int control;
766 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100767
Harvey Harrison441b62c2008-03-03 16:08:34 -0800768 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100769
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100770 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
Craig Shelley39a66b82005-05-27 00:09:56 +0100771
772 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
773 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
774 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
775 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
776 |((control & CONTROL_RING)? TIOCM_RI : 0)
777 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
778
Harvey Harrison441b62c2008-03-03 16:08:34 -0800779 dbg("%s - control = 0x%.2x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100780
781 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782}
783
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100784static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785{
Alan Cox95da3102008-07-22 11:09:07 +0100786 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700787 unsigned int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Harvey Harrison441b62c2008-03-03 16:08:34 -0800789 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 if (break_state == 0)
791 state = BREAK_OFF;
792 else
793 state = BREAK_ON;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800794 dbg("%s - turning break %s", __func__,
Alan Coxff7eb602008-07-22 11:10:17 +0100795 state == BREAK_OFF ? "off" : "on");
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100796 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797}
798
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100799static int cp210x_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100801 /* cp210x buffers behave strangely unless device is reset */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 usb_reset_device(serial->dev);
803 return 0;
804}
805
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100806static int __init cp210x_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807{
808 int retval;
809
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100810 retval = usb_serial_register(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 if (retval)
Craig Shelley39a66b82005-05-27 00:09:56 +0100812 return retval; /* Failed to register */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100814 retval = usb_register(&cp210x_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 if (retval) {
Craig Shelley39a66b82005-05-27 00:09:56 +0100816 /* Failed to register */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100817 usb_serial_deregister(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 return retval;
819 }
820
Craig Shelley39a66b82005-05-27 00:09:56 +0100821 /* Success */
Greg Kroah-Hartmanc197a8d2008-08-18 13:21:04 -0700822 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
823 DRIVER_DESC "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 return 0;
825}
826
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100827static void __exit cp210x_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100829 usb_deregister(&cp210x_driver);
830 usb_serial_deregister(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831}
832
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100833module_init(cp210x_init);
834module_exit(cp210x_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
836MODULE_DESCRIPTION(DRIVER_DESC);
837MODULE_VERSION(DRIVER_VERSION);
838MODULE_LICENSE("GPL");
839
840module_param(debug, bool, S_IRUGO | S_IWUSR);
841MODULE_PARM_DESC(debug, "Enable verbose debugging messages");