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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
Linus Torvalds1da177e2005-04-16 15:20:36 -070052static int debug;
53
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 Shelley92f5cae2007-04-20 14:37:17 +010077 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
Damir N Abdullin9a18e752008-10-30 13:52:38 -070078 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
Vitja Makarov212a4b42006-05-31 00:40:06 +040079 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
Craig Shelleyeefd9022010-05-15 13:36:38 +010080 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000081 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
Craig Shelley92f5cae2007-04-20 14:37:17 +010083 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +000084 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
Craig Shelleyba0f3322008-09-04 21:28:21 +010085 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
Craig Shelleye988fc82006-01-20 00:06:19 +000086 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
Craig Shelley8bf16ba2009-07-12 21:52:33 +010087 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
Jon K Hellanfc4bd642007-02-28 23:04:33 +010088 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
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 */
Craig Shelley59fba742008-04-12 16:15:54 +010095 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
Craig Shelleyeefd9022010-05-15 13:36:38 +010096 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
Bjorn Schneider78001e32006-10-28 12:42:04 +020097 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
98 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
Jeff Long8be27c22007-11-28 11:02:09 -050099 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
Alan Coxbd07c552010-02-08 10:10:44 +0000100 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100101 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
Bjorn Schneider78001e32006-10-28 12:42:04 +0200102 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
Tomasz K877e2622009-01-04 12:47:11 +0100103 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
Wolfgang Glas95bec452009-01-15 23:11:53 +0100104 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
Alan Coxbd07c552010-02-08 10:10:44 +0000105 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100106 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
Craig Shelleyba0f3322008-09-04 21:28:21 +0100107 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100108 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
Craig Shelley881e3c92008-11-09 20:17:54 +0000109 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000110 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
Craig Shelley8bf16ba2009-07-12 21:52:33 +0100111 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
Craig Shelleyfaea63f2011-01-02 21:51:46 +0000112 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
Alex Stephensd23bac92009-03-17 00:06:19 +0000113 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
Craig Shelley541e05e2010-08-23 20:50:57 +0100114 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +0000115 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
Craig Shelley61926b92006-10-12 22:09:56 +0100116 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100117 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000118 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
119 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
120 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
121 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
Pozsar Balazsebaf4942007-02-16 12:47:49 +0100122 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100123 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
Johannes Hoelzle05998d2006-12-02 16:54:27 +0100124 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100125 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000126 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
Josef Balatkab0ce84d2005-11-17 09:47:24 -0800127 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
Alessio Igor Bogani356c5a42010-07-27 23:05:14 +0200128 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
129 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
130 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
131 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
Craig Shelley541e05e2010-08-23 20:50:57 +0100132 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
133 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
134 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
Anders Larsen93ad03d2010-10-06 23:46:25 +0200135 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
Craig Shelley541e05e2010-08-23 20:50:57 +0100136 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
Craig Shelley39a66b82005-05-27 00:09:56 +0100137 { } /* Terminating Entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138};
139
Alan Coxff7eb602008-07-22 11:10:17 +0100140MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100142static struct usb_driver cp210x_driver = {
143 .name = "cp210x",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 .probe = usb_serial_probe,
145 .disconnect = usb_serial_disconnect,
146 .id_table = id_table,
Greg Kroah-Hartmanba9dc652005-11-16 13:41:28 -0800147 .no_dynamic_id = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148};
149
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100150static struct usb_serial_driver cp210x_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700151 .driver = {
152 .owner = THIS_MODULE,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100153 .name = "cp210x",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700154 },
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100155 .usb_driver = &cp210x_driver,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 .num_ports = 1,
Johan Hovoldaea006b2010-03-17 23:00:39 +0100158 .bulk_in_size = 256,
Johan Hovoldd4e598f2010-03-17 23:00:38 +0100159 .bulk_out_size = 256,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100160 .open = cp210x_open,
161 .close = cp210x_close,
162 .break_ctl = cp210x_break_ctl,
163 .set_termios = cp210x_set_termios,
164 .tiocmget = cp210x_tiocmget,
165 .tiocmset = cp210x_tiocmset,
166 .attach = cp210x_startup,
Libor Pechacekd14fc1a2011-01-14 14:30:21 +0100167 .dtr_rts = cp210x_dtr_rts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168};
169
Craig Shelley39a66b82005-05-27 00:09:56 +0100170/* Config request types */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171#define REQTYPE_HOST_TO_DEVICE 0x41
172#define REQTYPE_DEVICE_TO_HOST 0xc1
173
Craig Shelley93ef1f12009-06-11 13:53:30 +0100174/* Config request codes */
175#define CP210X_IFC_ENABLE 0x00
176#define CP210X_SET_BAUDDIV 0x01
177#define CP210X_GET_BAUDDIV 0x02
178#define CP210X_SET_LINE_CTL 0x03
179#define CP210X_GET_LINE_CTL 0x04
180#define CP210X_SET_BREAK 0x05
181#define CP210X_IMM_CHAR 0x06
182#define CP210X_SET_MHS 0x07
183#define CP210X_GET_MDMSTS 0x08
184#define CP210X_SET_XON 0x09
185#define CP210X_SET_XOFF 0x0A
186#define CP210X_SET_EVENTMASK 0x0B
187#define CP210X_GET_EVENTMASK 0x0C
188#define CP210X_SET_CHAR 0x0D
189#define CP210X_GET_CHARS 0x0E
190#define CP210X_GET_PROPS 0x0F
191#define CP210X_GET_COMM_STATUS 0x10
192#define CP210X_RESET 0x11
193#define CP210X_PURGE 0x12
194#define CP210X_SET_FLOW 0x13
195#define CP210X_GET_FLOW 0x14
196#define CP210X_EMBED_EVENTS 0x15
197#define CP210X_GET_EVENTSTATE 0x16
198#define CP210X_SET_CHARS 0x19
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Craig Shelley93ef1f12009-06-11 13:53:30 +0100200/* CP210X_IFC_ENABLE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201#define UART_ENABLE 0x0001
202#define UART_DISABLE 0x0000
203
Craig Shelley93ef1f12009-06-11 13:53:30 +0100204/* CP210X_(SET|GET)_BAUDDIV */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205#define BAUD_RATE_GEN_FREQ 0x384000
206
Craig Shelley93ef1f12009-06-11 13:53:30 +0100207/* CP210X_(SET|GET)_LINE_CTL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208#define BITS_DATA_MASK 0X0f00
Craig Shelley39a66b82005-05-27 00:09:56 +0100209#define BITS_DATA_5 0X0500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210#define BITS_DATA_6 0X0600
211#define BITS_DATA_7 0X0700
212#define BITS_DATA_8 0X0800
213#define BITS_DATA_9 0X0900
214
215#define BITS_PARITY_MASK 0x00f0
216#define BITS_PARITY_NONE 0x0000
217#define BITS_PARITY_ODD 0x0010
218#define BITS_PARITY_EVEN 0x0020
219#define BITS_PARITY_MARK 0x0030
220#define BITS_PARITY_SPACE 0x0040
221
222#define BITS_STOP_MASK 0x000f
223#define BITS_STOP_1 0x0000
224#define BITS_STOP_1_5 0x0001
225#define BITS_STOP_2 0x0002
Craig Shelley39a66b82005-05-27 00:09:56 +0100226
Craig Shelley93ef1f12009-06-11 13:53:30 +0100227/* CP210X_SET_BREAK */
Craig Shelley72916792010-08-18 22:13:39 +0100228#define BREAK_ON 0x0001
229#define BREAK_OFF 0x0000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Craig Shelley93ef1f12009-06-11 13:53:30 +0100231/* CP210X_(SET_MHS|GET_MDMSTS) */
Craig Shelley39a66b82005-05-27 00:09:56 +0100232#define CONTROL_DTR 0x0001
233#define CONTROL_RTS 0x0002
234#define CONTROL_CTS 0x0010
235#define CONTROL_DSR 0x0020
236#define CONTROL_RING 0x0040
237#define CONTROL_DCD 0x0080
238#define CONTROL_WRITE_DTR 0x0100
239#define CONTROL_WRITE_RTS 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Craig Shelley39a66b82005-05-27 00:09:56 +0100241/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100242 * cp210x_get_config
243 * Reads from the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100244 * 'size' is specified in bytes.
245 * 'data' is a pointer to a pre-allocated array of integers large
246 * enough to hold 'size' bytes (with 4 bytes to each integer)
247 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100248static int cp210x_get_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100249 unsigned int *data, int size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250{
251 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000252 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100253 int result, i, length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Craig Shelley39a66b82005-05-27 00:09:56 +0100255 /* Number of integers required to contain the array */
256 length = (((size - 1) | 3) + 1)/4;
257
Al Viro53ebb3b2007-02-09 16:39:55 +0000258 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100259 if (!buf) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800260 dev_err(&port->dev, "%s - out of memory.\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100261 return -ENOMEM;
262 }
263
Craig Shelley39a66b82005-05-27 00:09:56 +0100264 /* Issue the request, attempting to read 'size' bytes */
Alan Coxff7eb602008-07-22 11:10:17 +0100265 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
Craig Shelley39a66b82005-05-27 00:09:56 +0100267 0, buf, size, 300);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Craig Shelley39a66b82005-05-27 00:09:56 +0100269 /* Convert data into an array of integers */
Alan Coxff7eb602008-07-22 11:10:17 +0100270 for (i = 0; i < length; i++)
Craig Shelley39a66b82005-05-27 00:09:56 +0100271 data[i] = le32_to_cpu(buf[i]);
272
273 kfree(buf);
274
275 if (result != size) {
Craig Shelley97324952009-02-26 22:21:51 +0000276 dbg("%s - Unable to send config request, "
Craig Shelley39a66b82005-05-27 00:09:56 +0100277 "request=0x%x size=%d result=%d\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800278 __func__, request, size, result);
Craig Shelley39a66b82005-05-27 00:09:56 +0100279 return -EPROTO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 }
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 return 0;
283}
284
Craig Shelley39a66b82005-05-27 00:09:56 +0100285/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100286 * cp210x_set_config
287 * Writes to the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100288 * Values less than 16 bits wide are sent directly
289 * 'size' is specified in bytes.
290 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100291static int cp210x_set_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100292 unsigned int *data, int size)
293{
294 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000295 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100296 int result, i, length;
297
298 /* Number of integers required to contain the array */
299 length = (((size - 1) | 3) + 1)/4;
300
Al Viro53ebb3b2007-02-09 16:39:55 +0000301 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100302 if (!buf) {
303 dev_err(&port->dev, "%s - out of memory.\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800304 __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100305 return -ENOMEM;
306 }
307
308 /* Array of integers into bytes */
309 for (i = 0; i < length; i++)
310 buf[i] = cpu_to_le32(data[i]);
311
312 if (size > 2) {
Alan Coxff7eb602008-07-22 11:10:17 +0100313 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100314 usb_sndctrlpipe(serial->dev, 0),
315 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
316 0, buf, size, 300);
317 } else {
Alan Coxff7eb602008-07-22 11:10:17 +0100318 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100319 usb_sndctrlpipe(serial->dev, 0),
320 request, REQTYPE_HOST_TO_DEVICE, data[0],
321 0, NULL, 0, 300);
322 }
323
324 kfree(buf);
325
326 if ((size > 2 && result != size) || result < 0) {
Craig Shelley97324952009-02-26 22:21:51 +0000327 dbg("%s - Unable to send request, "
Craig Shelley39a66b82005-05-27 00:09:56 +0100328 "request=0x%x size=%d result=%d\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800329 __func__, request, size, result);
Craig Shelley39a66b82005-05-27 00:09:56 +0100330 return -EPROTO;
331 }
332
Craig Shelley39a66b82005-05-27 00:09:56 +0100333 return 0;
334}
335
336/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100337 * cp210x_set_config_single
338 * Convenience function for calling cp210x_set_config on single data values
Craig Shelley39a66b82005-05-27 00:09:56 +0100339 * without requiring an integer pointer
340 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100341static inline int cp210x_set_config_single(struct usb_serial_port *port,
Craig Shelley39a66b82005-05-27 00:09:56 +0100342 u8 request, unsigned int data)
343{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100344 return cp210x_set_config(port, request, &data, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100345}
346
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000347/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100348 * cp210x_quantise_baudrate
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000349 * Quantises the baud rate as per AN205 Table 1
350 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100351static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000352 if (baud <= 56) baud = 0;
353 else if (baud <= 300) baud = 300;
354 else if (baud <= 600) baud = 600;
355 else if (baud <= 1200) baud = 1200;
356 else if (baud <= 1800) baud = 1800;
357 else if (baud <= 2400) baud = 2400;
358 else if (baud <= 4000) baud = 4000;
359 else if (baud <= 4803) baud = 4800;
360 else if (baud <= 7207) baud = 7200;
361 else if (baud <= 9612) baud = 9600;
362 else if (baud <= 14428) baud = 14400;
363 else if (baud <= 16062) baud = 16000;
364 else if (baud <= 19250) baud = 19200;
365 else if (baud <= 28912) baud = 28800;
366 else if (baud <= 38601) baud = 38400;
367 else if (baud <= 51558) baud = 51200;
368 else if (baud <= 56280) baud = 56000;
369 else if (baud <= 58053) baud = 57600;
370 else if (baud <= 64111) baud = 64000;
371 else if (baud <= 77608) baud = 76800;
372 else if (baud <= 117028) baud = 115200;
373 else if (baud <= 129347) baud = 128000;
374 else if (baud <= 156868) baud = 153600;
375 else if (baud <= 237832) baud = 230400;
376 else if (baud <= 254234) baud = 250000;
377 else if (baud <= 273066) baud = 256000;
378 else if (baud <= 491520) baud = 460800;
379 else if (baud <= 567138) baud = 500000;
380 else if (baud <= 670254) baud = 576000;
381 else if (baud <= 1053257) baud = 921600;
382 else if (baud <= 1474560) baud = 1228800;
383 else if (baud <= 2457600) baud = 1843200;
384 else baud = 3686400;
385 return baud;
386}
387
Alan Coxa509a7e2009-09-19 13:13:26 -0700388static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 int result;
391
Harvey Harrison441b62c2008-03-03 16:08:34 -0800392 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100394 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 dev_err(&port->dev, "%s - Unable to enable UART\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800396 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 return -EPROTO;
398 }
399
Johan Hovolda9013172010-05-15 17:53:50 +0200400 result = usb_serial_generic_open(tty, port);
Johan Hovold2db6c762010-03-17 23:05:55 +0100401 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Craig Shelley39a66b82005-05-27 00:09:56 +0100404 /* Configure the termios structure */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100405 cp210x_get_termios(tty, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 return 0;
407}
408
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100409static void cp210x_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800411 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
Johan Hovoldf26788d2010-03-17 23:00:45 +0100413 usb_serial_generic_close(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Oliver Neukum95bef012008-01-22 13:56:18 +0100415 mutex_lock(&port->serial->disc_mutex);
416 if (!port->serial->disconnected)
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100417 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
Oliver Neukum95bef012008-01-22 13:56:18 +0100418 mutex_unlock(&port->serial->disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419}
420
Craig Shelley39a66b82005-05-27 00:09:56 +0100421/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100422 * cp210x_get_termios
Craig Shelley39a66b82005-05-27 00:09:56 +0100423 * Reads the baud rate, data bits, parity, stop bits and flow control mode
424 * from the device, corrects any unsupported values, and configures the
425 * termios structure to reflect the state of the device
426 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100427static void cp210x_get_termios(struct tty_struct *tty,
VomLehnd2ad67b2009-03-12 14:37:42 -0700428 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429{
VomLehnd2ad67b2009-03-12 14:37:42 -0700430 unsigned int baud;
431
432 if (tty) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100433 cp210x_get_termios_port(tty->driver_data,
VomLehnd2ad67b2009-03-12 14:37:42 -0700434 &tty->termios->c_cflag, &baud);
435 tty_encode_baud_rate(tty, baud, baud);
436 }
437
438 else {
439 unsigned int cflag;
440 cflag = 0;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100441 cp210x_get_termios_port(port, &cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700442 }
443}
444
445/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100446 * cp210x_get_termios_port
447 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
VomLehnd2ad67b2009-03-12 14:37:42 -0700448 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100449static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700450 unsigned int *cflagp, unsigned int *baudp)
451{
Craig Shelley39a66b82005-05-27 00:09:56 +0100452 unsigned int cflag, modem_ctl[4];
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700453 unsigned int baud;
454 unsigned int bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Harvey Harrison441b62c2008-03-03 16:08:34 -0800456 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100458 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100459 /* Convert to baudrate */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 if (baud)
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100461 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
Harvey Harrison441b62c2008-03-03 16:08:34 -0800463 dbg("%s - baud rate = %d", __func__, baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700464 *baudp = baud;
Alan Cox9ab0f202007-10-18 01:24:24 -0700465
VomLehnd2ad67b2009-03-12 14:37:42 -0700466 cflag = *cflagp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100468 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 cflag &= ~CSIZE;
Alan Coxff7eb602008-07-22 11:10:17 +0100470 switch (bits & BITS_DATA_MASK) {
471 case BITS_DATA_5:
472 dbg("%s - data bits = 5", __func__);
473 cflag |= CS5;
474 break;
475 case BITS_DATA_6:
476 dbg("%s - data bits = 6", __func__);
477 cflag |= CS6;
478 break;
479 case BITS_DATA_7:
480 dbg("%s - data bits = 7", __func__);
481 cflag |= CS7;
482 break;
483 case BITS_DATA_8:
484 dbg("%s - data bits = 8", __func__);
485 cflag |= CS8;
486 break;
487 case BITS_DATA_9:
488 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
489 __func__);
490 cflag |= CS8;
491 bits &= ~BITS_DATA_MASK;
492 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100493 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100494 break;
495 default:
496 dbg("%s - Unknown number of data bits, using 8", __func__);
497 cflag |= CS8;
498 bits &= ~BITS_DATA_MASK;
499 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100500 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100501 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 }
503
Alan Coxff7eb602008-07-22 11:10:17 +0100504 switch (bits & BITS_PARITY_MASK) {
505 case BITS_PARITY_NONE:
506 dbg("%s - parity = NONE", __func__);
507 cflag &= ~PARENB;
508 break;
509 case BITS_PARITY_ODD:
510 dbg("%s - parity = ODD", __func__);
511 cflag |= (PARENB|PARODD);
512 break;
513 case BITS_PARITY_EVEN:
514 dbg("%s - parity = EVEN", __func__);
515 cflag &= ~PARODD;
516 cflag |= PARENB;
517 break;
518 case BITS_PARITY_MARK:
519 dbg("%s - parity = MARK (not supported, disabling parity)",
520 __func__);
521 cflag &= ~PARENB;
522 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100523 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100524 break;
525 case BITS_PARITY_SPACE:
526 dbg("%s - parity = SPACE (not supported, disabling parity)",
527 __func__);
528 cflag &= ~PARENB;
529 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100530 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100531 break;
532 default:
533 dbg("%s - Unknown parity mode, disabling parity", __func__);
534 cflag &= ~PARENB;
535 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100536 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100537 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 }
539
540 cflag &= ~CSTOPB;
Alan Coxff7eb602008-07-22 11:10:17 +0100541 switch (bits & BITS_STOP_MASK) {
542 case BITS_STOP_1:
543 dbg("%s - stop bits = 1", __func__);
544 break;
545 case BITS_STOP_1_5:
546 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
547 __func__);
548 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100549 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100550 break;
551 case BITS_STOP_2:
552 dbg("%s - stop bits = 2", __func__);
553 cflag |= CSTOPB;
554 break;
555 default:
556 dbg("%s - Unknown number of stop bits, using 1 stop bit",
557 __func__);
558 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100559 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100560 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 }
562
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100563 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100564 if (modem_ctl[0] & 0x0008) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800565 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100566 cflag |= CRTSCTS;
567 } else {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800568 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100569 cflag &= ~CRTSCTS;
570 }
571
VomLehnd2ad67b2009-03-12 14:37:42 -0700572 *cflagp = cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573}
574
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100575static void cp210x_set_termios(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100576 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577{
Alan Cox9ab0f202007-10-18 01:24:24 -0700578 unsigned int cflag, old_cflag;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700579 unsigned int baud = 0, bits;
Craig Shelley39a66b82005-05-27 00:09:56 +0100580 unsigned int modem_ctl[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Harvey Harrison441b62c2008-03-03 16:08:34 -0800582 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
Alan Cox95da3102008-07-22 11:09:07 +0100584 if (!tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 return;
Alan Cox9ab0f202007-10-18 01:24:24 -0700586
Alan Cox95da3102008-07-22 11:09:07 +0100587 tty->termios->c_cflag &= ~CMSPAR;
588 cflag = tty->termios->c_cflag;
Alan Cox01e96d22007-07-26 18:54:12 +0100589 old_cflag = old_termios->c_cflag;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100590 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
592 /* If the baud rate is to be updated*/
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000593 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
594 dbg("%s - Setting baud rate to %d baud", __func__,
595 baud);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100596 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000597 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
Joe Perches759f3632010-02-05 16:50:08 -0800598 dbg("Baud rate requested not supported by device");
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000599 baud = tty_termios_baud_rate(old_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 }
601 }
Alan Cox9ab0f202007-10-18 01:24:24 -0700602 /* Report back the resulting baud rate */
Alan Cox95da3102008-07-22 11:09:07 +0100603 tty_encode_baud_rate(tty, baud, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
Craig Shelley39a66b82005-05-27 00:09:56 +0100605 /* If the number of data bits is to be updated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100607 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 bits &= ~BITS_DATA_MASK;
609 switch (cflag & CSIZE) {
Alan Coxff7eb602008-07-22 11:10:17 +0100610 case CS5:
611 bits |= BITS_DATA_5;
612 dbg("%s - data bits = 5", __func__);
613 break;
614 case CS6:
615 bits |= BITS_DATA_6;
616 dbg("%s - data bits = 6", __func__);
617 break;
618 case CS7:
619 bits |= BITS_DATA_7;
620 dbg("%s - data bits = 7", __func__);
621 break;
622 case CS8:
623 bits |= BITS_DATA_8;
624 dbg("%s - data bits = 8", __func__);
625 break;
626 /*case CS9:
627 bits |= BITS_DATA_9;
628 dbg("%s - data bits = 9", __func__);
629 break;*/
630 default:
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100631 dbg("cp210x driver does not "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 "support the number of bits requested,"
633 " using 8 bit mode\n");
634 bits |= BITS_DATA_8;
635 break;
636 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100637 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000638 dbg("Number of data bits requested "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 "not supported by device\n");
640 }
641
642 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100643 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 bits &= ~BITS_PARITY_MASK;
645 if (cflag & PARENB) {
646 if (cflag & PARODD) {
647 bits |= BITS_PARITY_ODD;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800648 dbg("%s - parity = ODD", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 } else {
650 bits |= BITS_PARITY_EVEN;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800651 dbg("%s - parity = EVEN", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 }
653 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100654 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000655 dbg("Parity mode not supported "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 "by device\n");
657 }
658
659 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100660 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 bits &= ~BITS_STOP_MASK;
662 if (cflag & CSTOPB) {
663 bits |= BITS_STOP_2;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800664 dbg("%s - stop bits = 2", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 } else {
666 bits |= BITS_STOP_1;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800667 dbg("%s - stop bits = 1", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100669 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000670 dbg("Number of stop bits requested "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 "not supported by device\n");
672 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100673
674 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100675 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100676 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800677 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100678 modem_ctl[2], modem_ctl[3]);
679
680 if (cflag & CRTSCTS) {
681 modem_ctl[0] &= ~0x7B;
682 modem_ctl[0] |= 0x09;
683 modem_ctl[1] = 0x80;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800684 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100685 } else {
686 modem_ctl[0] &= ~0x7B;
687 modem_ctl[0] |= 0x01;
688 modem_ctl[1] |= 0x40;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800689 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100690 }
691
692 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800693 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100694 modem_ctl[2], modem_ctl[3]);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100695 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100696 }
697
698}
699
Alan Cox20b9d172011-02-14 16:26:50 +0000700static int cp210x_tiocmset (struct tty_struct *tty,
Craig Shelley39a66b82005-05-27 00:09:56 +0100701 unsigned int set, unsigned int clear)
702{
Alan Cox95da3102008-07-22 11:09:07 +0100703 struct usb_serial_port *port = tty->driver_data;
Alan Cox20b9d172011-02-14 16:26:50 +0000704 return cp210x_tiocmset_port(port, set, clear);
VomLehnd2ad67b2009-03-12 14:37:42 -0700705}
706
Alan Cox20b9d172011-02-14 16:26:50 +0000707static int cp210x_tiocmset_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700708 unsigned int set, unsigned int clear)
709{
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700710 unsigned int control = 0;
Craig Shelley39a66b82005-05-27 00:09:56 +0100711
Harvey Harrison441b62c2008-03-03 16:08:34 -0800712 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100713
714 if (set & TIOCM_RTS) {
715 control |= CONTROL_RTS;
716 control |= CONTROL_WRITE_RTS;
717 }
718 if (set & TIOCM_DTR) {
719 control |= CONTROL_DTR;
720 control |= CONTROL_WRITE_DTR;
721 }
722 if (clear & TIOCM_RTS) {
723 control &= ~CONTROL_RTS;
724 control |= CONTROL_WRITE_RTS;
725 }
726 if (clear & TIOCM_DTR) {
727 control &= ~CONTROL_DTR;
728 control |= CONTROL_WRITE_DTR;
729 }
730
Harvey Harrison441b62c2008-03-03 16:08:34 -0800731 dbg("%s - control = 0x%.4x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100732
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100733 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100734}
735
Alan Coxd94c7bd2009-10-28 21:12:33 +0100736static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
737{
738 if (on)
Alan Cox20b9d172011-02-14 16:26:50 +0000739 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100740 else
Alan Cox20b9d172011-02-14 16:26:50 +0000741 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
Alan Coxd94c7bd2009-10-28 21:12:33 +0100742}
743
Alan Cox60b33c12011-02-14 16:26:14 +0000744static int cp210x_tiocmget (struct tty_struct *tty)
Craig Shelley39a66b82005-05-27 00:09:56 +0100745{
Alan Cox95da3102008-07-22 11:09:07 +0100746 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700747 unsigned int control;
748 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100749
Harvey Harrison441b62c2008-03-03 16:08:34 -0800750 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100751
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100752 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
Craig Shelley39a66b82005-05-27 00:09:56 +0100753
754 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
755 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
756 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
757 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
758 |((control & CONTROL_RING)? TIOCM_RI : 0)
759 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
760
Harvey Harrison441b62c2008-03-03 16:08:34 -0800761 dbg("%s - control = 0x%.2x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100762
763 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764}
765
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100766static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767{
Alan Cox95da3102008-07-22 11:09:07 +0100768 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700769 unsigned int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
Harvey Harrison441b62c2008-03-03 16:08:34 -0800771 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 if (break_state == 0)
773 state = BREAK_OFF;
774 else
775 state = BREAK_ON;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800776 dbg("%s - turning break %s", __func__,
Alan Coxff7eb602008-07-22 11:10:17 +0100777 state == BREAK_OFF ? "off" : "on");
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100778 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779}
780
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100781static int cp210x_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100783 /* cp210x buffers behave strangely unless device is reset */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 usb_reset_device(serial->dev);
785 return 0;
786}
787
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100788static int __init cp210x_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789{
790 int retval;
791
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100792 retval = usb_serial_register(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 if (retval)
Craig Shelley39a66b82005-05-27 00:09:56 +0100794 return retval; /* Failed to register */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100796 retval = usb_register(&cp210x_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 if (retval) {
Craig Shelley39a66b82005-05-27 00:09:56 +0100798 /* Failed to register */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100799 usb_serial_deregister(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 return retval;
801 }
802
Craig Shelley39a66b82005-05-27 00:09:56 +0100803 /* Success */
Greg Kroah-Hartmanc197a8d2008-08-18 13:21:04 -0700804 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
805 DRIVER_DESC "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 return 0;
807}
808
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100809static void __exit cp210x_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100811 usb_deregister(&cp210x_driver);
812 usb_serial_deregister(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813}
814
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100815module_init(cp210x_init);
816module_exit(cp210x_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
818MODULE_DESCRIPTION(DRIVER_DESC);
819MODULE_VERSION(DRIVER_VERSION);
820MODULE_LICENSE("GPL");
821
822module_param(debug, bool, S_IRUGO | S_IWUSR);
823MODULE_PARM_DESC(debug, "Enable verbose debugging messages");