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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*);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010044static int cp210x_tiocmget(struct tty_struct *, struct file *);
45static int cp210x_tiocmset(struct tty_struct *, struct file *,
Craig Shelley39a66b82005-05-27 00:09:56 +010046 unsigned int, unsigned int);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010047static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
VomLehnd2ad67b2009-03-12 14:37:42 -070048 unsigned int, unsigned int);
Craig Shelley4cc27bd2009-06-11 13:54:40 +010049static void cp210x_break_ctl(struct tty_struct *, int);
50static int cp210x_startup(struct usb_serial *);
Alan Coxd94c7bd2009-10-28 21:12:33 +010051static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
52static int cp210x_carrier_raised(struct usb_serial_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Linus Torvalds1da177e2005-04-16 15:20:36 -070054static int debug;
55
Németh Márton7d40d7e2010-01-10 15:34:24 +010056static const struct usb_device_id id_table[] = {
M Kondrin5091b582008-11-14 13:02:45 +030057 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
Craig Shelley59fba742008-04-12 16:15:54 +010058 { USB_DEVICE(0x0489, 0xE000) }, /* 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 */
Craig Shelleyeefd9022010-05-15 13:36:38 +010088 { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */
Jon K Hellanfc4bd642007-02-28 23:04:33 +010089 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
90 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
Jason Detring0bf7a812010-08-26 15:08:54 -050091 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
Craig Shelleye988fc82006-01-20 00:06:19 +000092 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
Craig Shelleyeefd9022010-05-15 13:36:38 +010093 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
Robert M. Kenneyc6535662009-02-26 14:58:39 -050094 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
Bernhard Beck966236972008-05-11 09:23:13 -070095 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
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 */
Wolfgang Glas95bec452009-01-15 23:11:53 +0100105 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
Alan Coxbd07c552010-02-08 10:10:44 +0000106 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys 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 Shelley8bf16ba2009-07-12 21:52:33 +0100111 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
Alex Stephensd23bac92009-03-17 00:06:19 +0000112 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
Craig Shelley541e05e2010-08-23 20:50:57 +0100113 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
Craig Shelleye988fc82006-01-20 00:06:19 +0000114 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
Craig Shelley61926b92006-10-12 22:09:56 +0100115 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
Craig Shelleyeefd9022010-05-15 13:36:38 +0100116 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000117 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
118 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
119 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
120 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
Pozsar Balazsebaf4942007-02-16 12:47:49 +0100121 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100122 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
Johannes Hoelzle05998d2006-12-02 16:54:27 +0100123 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
Craig Shelleyb7c7cbc2009-06-11 13:52:31 +0100124 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
Craig Shelley5de8b3a2008-01-03 12:45:59 +0000125 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
Josef Balatkab0ce84d2005-11-17 09:47:24 -0800126 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
Alessio Igor Bogani356c5a42010-07-27 23:05:14 +0200127 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
128 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
129 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
130 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
Craig Shelley541e05e2010-08-23 20:50:57 +0100131 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
132 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
133 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
134 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
Craig Shelley39a66b82005-05-27 00:09:56 +0100135 { } /* Terminating Entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136};
137
Alan Coxff7eb602008-07-22 11:10:17 +0100138MODULE_DEVICE_TABLE(usb, id_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100140static struct usb_driver cp210x_driver = {
141 .name = "cp210x",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 .probe = usb_serial_probe,
143 .disconnect = usb_serial_disconnect,
144 .id_table = id_table,
Greg Kroah-Hartmanba9dc652005-11-16 13:41:28 -0800145 .no_dynamic_id = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146};
147
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100148static struct usb_serial_driver cp210x_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700149 .driver = {
150 .owner = THIS_MODULE,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100151 .name = "cp210x",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700152 },
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100153 .usb_driver = &cp210x_driver,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 .id_table = id_table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 .num_ports = 1,
Johan Hovoldaea006b2010-03-17 23:00:39 +0100156 .bulk_in_size = 256,
Johan Hovoldd4e598f2010-03-17 23:00:38 +0100157 .bulk_out_size = 256,
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100158 .open = cp210x_open,
159 .close = cp210x_close,
160 .break_ctl = cp210x_break_ctl,
161 .set_termios = cp210x_set_termios,
162 .tiocmget = cp210x_tiocmget,
163 .tiocmset = cp210x_tiocmset,
164 .attach = cp210x_startup,
Alan Coxd94c7bd2009-10-28 21:12:33 +0100165 .dtr_rts = cp210x_dtr_rts,
166 .carrier_raised = cp210x_carrier_raised
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167};
168
Craig Shelley39a66b82005-05-27 00:09:56 +0100169/* Config request types */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170#define REQTYPE_HOST_TO_DEVICE 0x41
171#define REQTYPE_DEVICE_TO_HOST 0xc1
172
Craig Shelley93ef1f12009-06-11 13:53:30 +0100173/* Config request codes */
174#define CP210X_IFC_ENABLE 0x00
175#define CP210X_SET_BAUDDIV 0x01
176#define CP210X_GET_BAUDDIV 0x02
177#define CP210X_SET_LINE_CTL 0x03
178#define CP210X_GET_LINE_CTL 0x04
179#define CP210X_SET_BREAK 0x05
180#define CP210X_IMM_CHAR 0x06
181#define CP210X_SET_MHS 0x07
182#define CP210X_GET_MDMSTS 0x08
183#define CP210X_SET_XON 0x09
184#define CP210X_SET_XOFF 0x0A
185#define CP210X_SET_EVENTMASK 0x0B
186#define CP210X_GET_EVENTMASK 0x0C
187#define CP210X_SET_CHAR 0x0D
188#define CP210X_GET_CHARS 0x0E
189#define CP210X_GET_PROPS 0x0F
190#define CP210X_GET_COMM_STATUS 0x10
191#define CP210X_RESET 0x11
192#define CP210X_PURGE 0x12
193#define CP210X_SET_FLOW 0x13
194#define CP210X_GET_FLOW 0x14
195#define CP210X_EMBED_EVENTS 0x15
196#define CP210X_GET_EVENTSTATE 0x16
197#define CP210X_SET_CHARS 0x19
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Craig Shelley93ef1f12009-06-11 13:53:30 +0100199/* CP210X_IFC_ENABLE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200#define UART_ENABLE 0x0001
201#define UART_DISABLE 0x0000
202
Craig Shelley93ef1f12009-06-11 13:53:30 +0100203/* CP210X_(SET|GET)_BAUDDIV */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204#define BAUD_RATE_GEN_FREQ 0x384000
205
Craig Shelley93ef1f12009-06-11 13:53:30 +0100206/* CP210X_(SET|GET)_LINE_CTL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207#define BITS_DATA_MASK 0X0f00
Craig Shelley39a66b82005-05-27 00:09:56 +0100208#define BITS_DATA_5 0X0500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209#define BITS_DATA_6 0X0600
210#define BITS_DATA_7 0X0700
211#define BITS_DATA_8 0X0800
212#define BITS_DATA_9 0X0900
213
214#define BITS_PARITY_MASK 0x00f0
215#define BITS_PARITY_NONE 0x0000
216#define BITS_PARITY_ODD 0x0010
217#define BITS_PARITY_EVEN 0x0020
218#define BITS_PARITY_MARK 0x0030
219#define BITS_PARITY_SPACE 0x0040
220
221#define BITS_STOP_MASK 0x000f
222#define BITS_STOP_1 0x0000
223#define BITS_STOP_1_5 0x0001
224#define BITS_STOP_2 0x0002
Craig Shelley39a66b82005-05-27 00:09:56 +0100225
Craig Shelley93ef1f12009-06-11 13:53:30 +0100226/* CP210X_SET_BREAK */
Craig Shelley72916792010-08-18 22:13:39 +0100227#define BREAK_ON 0x0001
228#define BREAK_OFF 0x0000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Craig Shelley93ef1f12009-06-11 13:53:30 +0100230/* CP210X_(SET_MHS|GET_MDMSTS) */
Craig Shelley39a66b82005-05-27 00:09:56 +0100231#define CONTROL_DTR 0x0001
232#define CONTROL_RTS 0x0002
233#define CONTROL_CTS 0x0010
234#define CONTROL_DSR 0x0020
235#define CONTROL_RING 0x0040
236#define CONTROL_DCD 0x0080
237#define CONTROL_WRITE_DTR 0x0100
238#define CONTROL_WRITE_RTS 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Craig Shelley39a66b82005-05-27 00:09:56 +0100240/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100241 * cp210x_get_config
242 * Reads from the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100243 * 'size' is specified in bytes.
244 * 'data' is a pointer to a pre-allocated array of integers large
245 * enough to hold 'size' bytes (with 4 bytes to each integer)
246 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100247static int cp210x_get_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100248 unsigned int *data, int size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
250 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000251 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100252 int result, i, length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Craig Shelley39a66b82005-05-27 00:09:56 +0100254 /* Number of integers required to contain the array */
255 length = (((size - 1) | 3) + 1)/4;
256
Al Viro53ebb3b2007-02-09 16:39:55 +0000257 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100258 if (!buf) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800259 dev_err(&port->dev, "%s - out of memory.\n", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100260 return -ENOMEM;
261 }
262
Craig Shelley39a66b82005-05-27 00:09:56 +0100263 /* Issue the request, attempting to read 'size' bytes */
Alan Coxff7eb602008-07-22 11:10:17 +0100264 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
Craig Shelley39a66b82005-05-27 00:09:56 +0100266 0, buf, size, 300);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
Craig Shelley39a66b82005-05-27 00:09:56 +0100268 /* Convert data into an array of integers */
Alan Coxff7eb602008-07-22 11:10:17 +0100269 for (i = 0; i < length; i++)
Craig Shelley39a66b82005-05-27 00:09:56 +0100270 data[i] = le32_to_cpu(buf[i]);
271
272 kfree(buf);
273
274 if (result != size) {
Craig Shelley97324952009-02-26 22:21:51 +0000275 dbg("%s - Unable to send config request, "
Craig Shelley39a66b82005-05-27 00:09:56 +0100276 "request=0x%x size=%d result=%d\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800277 __func__, request, size, result);
Craig Shelley39a66b82005-05-27 00:09:56 +0100278 return -EPROTO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 }
280
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 return 0;
282}
283
Craig Shelley39a66b82005-05-27 00:09:56 +0100284/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100285 * cp210x_set_config
286 * Writes to the CP210x configuration registers
Craig Shelley39a66b82005-05-27 00:09:56 +0100287 * Values less than 16 bits wide are sent directly
288 * 'size' is specified in bytes.
289 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100290static int cp210x_set_config(struct usb_serial_port *port, u8 request,
Craig Shelley39a66b82005-05-27 00:09:56 +0100291 unsigned int *data, int size)
292{
293 struct usb_serial *serial = port->serial;
Al Viro53ebb3b2007-02-09 16:39:55 +0000294 __le32 *buf;
Craig Shelley39a66b82005-05-27 00:09:56 +0100295 int result, i, length;
296
297 /* Number of integers required to contain the array */
298 length = (((size - 1) | 3) + 1)/4;
299
Al Viro53ebb3b2007-02-09 16:39:55 +0000300 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
Craig Shelley39a66b82005-05-27 00:09:56 +0100301 if (!buf) {
302 dev_err(&port->dev, "%s - out of memory.\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800303 __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100304 return -ENOMEM;
305 }
306
307 /* Array of integers into bytes */
308 for (i = 0; i < length; i++)
309 buf[i] = cpu_to_le32(data[i]);
310
311 if (size > 2) {
Alan Coxff7eb602008-07-22 11:10:17 +0100312 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100313 usb_sndctrlpipe(serial->dev, 0),
314 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
315 0, buf, size, 300);
316 } else {
Alan Coxff7eb602008-07-22 11:10:17 +0100317 result = usb_control_msg(serial->dev,
Craig Shelley39a66b82005-05-27 00:09:56 +0100318 usb_sndctrlpipe(serial->dev, 0),
319 request, REQTYPE_HOST_TO_DEVICE, data[0],
320 0, NULL, 0, 300);
321 }
322
323 kfree(buf);
324
325 if ((size > 2 && result != size) || result < 0) {
Craig Shelley97324952009-02-26 22:21:51 +0000326 dbg("%s - Unable to send request, "
Craig Shelley39a66b82005-05-27 00:09:56 +0100327 "request=0x%x size=%d result=%d\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800328 __func__, request, size, result);
Craig Shelley39a66b82005-05-27 00:09:56 +0100329 return -EPROTO;
330 }
331
Craig Shelley39a66b82005-05-27 00:09:56 +0100332 return 0;
333}
334
335/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100336 * cp210x_set_config_single
337 * Convenience function for calling cp210x_set_config on single data values
Craig Shelley39a66b82005-05-27 00:09:56 +0100338 * without requiring an integer pointer
339 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100340static inline int cp210x_set_config_single(struct usb_serial_port *port,
Craig Shelley39a66b82005-05-27 00:09:56 +0100341 u8 request, unsigned int data)
342{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100343 return cp210x_set_config(port, request, &data, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100344}
345
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000346/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100347 * cp210x_quantise_baudrate
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000348 * Quantises the baud rate as per AN205 Table 1
349 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100350static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000351 if (baud <= 56) baud = 0;
352 else if (baud <= 300) baud = 300;
353 else if (baud <= 600) baud = 600;
354 else if (baud <= 1200) baud = 1200;
355 else if (baud <= 1800) baud = 1800;
356 else if (baud <= 2400) baud = 2400;
357 else if (baud <= 4000) baud = 4000;
358 else if (baud <= 4803) baud = 4800;
359 else if (baud <= 7207) baud = 7200;
360 else if (baud <= 9612) baud = 9600;
361 else if (baud <= 14428) baud = 14400;
362 else if (baud <= 16062) baud = 16000;
363 else if (baud <= 19250) baud = 19200;
364 else if (baud <= 28912) baud = 28800;
365 else if (baud <= 38601) baud = 38400;
366 else if (baud <= 51558) baud = 51200;
367 else if (baud <= 56280) baud = 56000;
368 else if (baud <= 58053) baud = 57600;
369 else if (baud <= 64111) baud = 64000;
370 else if (baud <= 77608) baud = 76800;
371 else if (baud <= 117028) baud = 115200;
372 else if (baud <= 129347) baud = 128000;
373 else if (baud <= 156868) baud = 153600;
374 else if (baud <= 237832) baud = 230400;
375 else if (baud <= 254234) baud = 250000;
376 else if (baud <= 273066) baud = 256000;
377 else if (baud <= 491520) baud = 460800;
378 else if (baud <= 567138) baud = 500000;
379 else if (baud <= 670254) baud = 576000;
380 else if (baud <= 1053257) baud = 921600;
381 else if (baud <= 1474560) baud = 1228800;
382 else if (baud <= 2457600) baud = 1843200;
383 else baud = 3686400;
384 return baud;
385}
386
Alan Coxa509a7e2009-09-19 13:13:26 -0700387static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 int result;
390
Harvey Harrison441b62c2008-03-03 16:08:34 -0800391 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100393 if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 dev_err(&port->dev, "%s - Unable to enable UART\n",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800395 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 return -EPROTO;
397 }
398
Johan Hovolda9013172010-05-15 17:53:50 +0200399 result = usb_serial_generic_open(tty, port);
Johan Hovold2db6c762010-03-17 23:05:55 +0100400 if (result)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Craig Shelley39a66b82005-05-27 00:09:56 +0100403 /* Configure the termios structure */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100404 cp210x_get_termios(tty, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 return 0;
406}
407
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100408static void cp210x_close(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800410 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
Johan Hovoldf26788d2010-03-17 23:00:45 +0100412 usb_serial_generic_close(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Oliver Neukum95bef012008-01-22 13:56:18 +0100414 mutex_lock(&port->serial->disc_mutex);
415 if (!port->serial->disconnected)
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100416 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
Oliver Neukum95bef012008-01-22 13:56:18 +0100417 mutex_unlock(&port->serial->disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418}
419
Craig Shelley39a66b82005-05-27 00:09:56 +0100420/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100421 * cp210x_get_termios
Craig Shelley39a66b82005-05-27 00:09:56 +0100422 * Reads the baud rate, data bits, parity, stop bits and flow control mode
423 * from the device, corrects any unsupported values, and configures the
424 * termios structure to reflect the state of the device
425 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100426static void cp210x_get_termios(struct tty_struct *tty,
VomLehnd2ad67b2009-03-12 14:37:42 -0700427 struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428{
VomLehnd2ad67b2009-03-12 14:37:42 -0700429 unsigned int baud;
430
431 if (tty) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100432 cp210x_get_termios_port(tty->driver_data,
VomLehnd2ad67b2009-03-12 14:37:42 -0700433 &tty->termios->c_cflag, &baud);
434 tty_encode_baud_rate(tty, baud, baud);
435 }
436
437 else {
438 unsigned int cflag;
439 cflag = 0;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100440 cp210x_get_termios_port(port, &cflag, &baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700441 }
442}
443
444/*
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100445 * cp210x_get_termios_port
446 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
VomLehnd2ad67b2009-03-12 14:37:42 -0700447 */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100448static void cp210x_get_termios_port(struct usb_serial_port *port,
VomLehnd2ad67b2009-03-12 14:37:42 -0700449 unsigned int *cflagp, unsigned int *baudp)
450{
Craig Shelley39a66b82005-05-27 00:09:56 +0100451 unsigned int cflag, modem_ctl[4];
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700452 unsigned int baud;
453 unsigned int bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Harvey Harrison441b62c2008-03-03 16:08:34 -0800455 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100457 cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100458 /* Convert to baudrate */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 if (baud)
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100460 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Harvey Harrison441b62c2008-03-03 16:08:34 -0800462 dbg("%s - baud rate = %d", __func__, baud);
VomLehnd2ad67b2009-03-12 14:37:42 -0700463 *baudp = baud;
Alan Cox9ab0f202007-10-18 01:24:24 -0700464
VomLehnd2ad67b2009-03-12 14:37:42 -0700465 cflag = *cflagp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100467 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 cflag &= ~CSIZE;
Alan Coxff7eb602008-07-22 11:10:17 +0100469 switch (bits & BITS_DATA_MASK) {
470 case BITS_DATA_5:
471 dbg("%s - data bits = 5", __func__);
472 cflag |= CS5;
473 break;
474 case BITS_DATA_6:
475 dbg("%s - data bits = 6", __func__);
476 cflag |= CS6;
477 break;
478 case BITS_DATA_7:
479 dbg("%s - data bits = 7", __func__);
480 cflag |= CS7;
481 break;
482 case BITS_DATA_8:
483 dbg("%s - data bits = 8", __func__);
484 cflag |= CS8;
485 break;
486 case BITS_DATA_9:
487 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
488 __func__);
489 cflag |= CS8;
490 bits &= ~BITS_DATA_MASK;
491 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100492 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100493 break;
494 default:
495 dbg("%s - Unknown number of data bits, using 8", __func__);
496 cflag |= CS8;
497 bits &= ~BITS_DATA_MASK;
498 bits |= BITS_DATA_8;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100499 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100500 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 }
502
Alan Coxff7eb602008-07-22 11:10:17 +0100503 switch (bits & BITS_PARITY_MASK) {
504 case BITS_PARITY_NONE:
505 dbg("%s - parity = NONE", __func__);
506 cflag &= ~PARENB;
507 break;
508 case BITS_PARITY_ODD:
509 dbg("%s - parity = ODD", __func__);
510 cflag |= (PARENB|PARODD);
511 break;
512 case BITS_PARITY_EVEN:
513 dbg("%s - parity = EVEN", __func__);
514 cflag &= ~PARODD;
515 cflag |= PARENB;
516 break;
517 case BITS_PARITY_MARK:
518 dbg("%s - parity = MARK (not supported, disabling parity)",
519 __func__);
520 cflag &= ~PARENB;
521 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100522 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100523 break;
524 case BITS_PARITY_SPACE:
525 dbg("%s - parity = SPACE (not supported, disabling parity)",
526 __func__);
527 cflag &= ~PARENB;
528 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100529 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100530 break;
531 default:
532 dbg("%s - Unknown parity mode, disabling parity", __func__);
533 cflag &= ~PARENB;
534 bits &= ~BITS_PARITY_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100535 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100536 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 }
538
539 cflag &= ~CSTOPB;
Alan Coxff7eb602008-07-22 11:10:17 +0100540 switch (bits & BITS_STOP_MASK) {
541 case BITS_STOP_1:
542 dbg("%s - stop bits = 1", __func__);
543 break;
544 case BITS_STOP_1_5:
545 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
546 __func__);
547 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100548 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100549 break;
550 case BITS_STOP_2:
551 dbg("%s - stop bits = 2", __func__);
552 cflag |= CSTOPB;
553 break;
554 default:
555 dbg("%s - Unknown number of stop bits, using 1 stop bit",
556 __func__);
557 bits &= ~BITS_STOP_MASK;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100558 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
Alan Coxff7eb602008-07-22 11:10:17 +0100559 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 }
561
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100562 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100563 if (modem_ctl[0] & 0x0008) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800564 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100565 cflag |= CRTSCTS;
566 } else {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800567 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100568 cflag &= ~CRTSCTS;
569 }
570
VomLehnd2ad67b2009-03-12 14:37:42 -0700571 *cflagp = cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572}
573
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100574static void cp210x_set_termios(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100575 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576{
Alan Cox9ab0f202007-10-18 01:24:24 -0700577 unsigned int cflag, old_cflag;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700578 unsigned int baud = 0, bits;
Craig Shelley39a66b82005-05-27 00:09:56 +0100579 unsigned int modem_ctl[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
Harvey Harrison441b62c2008-03-03 16:08:34 -0800581 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Alan Cox95da3102008-07-22 11:09:07 +0100583 if (!tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 return;
Alan Cox9ab0f202007-10-18 01:24:24 -0700585
Alan Cox95da3102008-07-22 11:09:07 +0100586 tty->termios->c_cflag &= ~CMSPAR;
587 cflag = tty->termios->c_cflag;
Alan Cox01e96d22007-07-26 18:54:12 +0100588 old_cflag = old_termios->c_cflag;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100589 baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
591 /* If the baud rate is to be updated*/
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000592 if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
593 dbg("%s - Setting baud rate to %d baud", __func__,
594 baud);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100595 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000596 ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
Joe Perches759f3632010-02-05 16:50:08 -0800597 dbg("Baud rate requested not supported by device");
Craig Shelleyef8b6bc2009-02-26 22:19:22 +0000598 baud = tty_termios_baud_rate(old_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 }
600 }
Alan Cox9ab0f202007-10-18 01:24:24 -0700601 /* Report back the resulting baud rate */
Alan Cox95da3102008-07-22 11:09:07 +0100602 tty_encode_baud_rate(tty, baud, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Craig Shelley39a66b82005-05-27 00:09:56 +0100604 /* If the number of data bits is to be updated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100606 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 bits &= ~BITS_DATA_MASK;
608 switch (cflag & CSIZE) {
Alan Coxff7eb602008-07-22 11:10:17 +0100609 case CS5:
610 bits |= BITS_DATA_5;
611 dbg("%s - data bits = 5", __func__);
612 break;
613 case CS6:
614 bits |= BITS_DATA_6;
615 dbg("%s - data bits = 6", __func__);
616 break;
617 case CS7:
618 bits |= BITS_DATA_7;
619 dbg("%s - data bits = 7", __func__);
620 break;
621 case CS8:
622 bits |= BITS_DATA_8;
623 dbg("%s - data bits = 8", __func__);
624 break;
625 /*case CS9:
626 bits |= BITS_DATA_9;
627 dbg("%s - data bits = 9", __func__);
628 break;*/
629 default:
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100630 dbg("cp210x driver does not "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 "support the number of bits requested,"
632 " using 8 bit mode\n");
633 bits |= BITS_DATA_8;
634 break;
635 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100636 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000637 dbg("Number of data bits requested "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 "not supported by device\n");
639 }
640
641 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100642 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 bits &= ~BITS_PARITY_MASK;
644 if (cflag & PARENB) {
645 if (cflag & PARODD) {
646 bits |= BITS_PARITY_ODD;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800647 dbg("%s - parity = ODD", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 } else {
649 bits |= BITS_PARITY_EVEN;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800650 dbg("%s - parity = EVEN", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 }
652 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100653 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000654 dbg("Parity mode not supported "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 "by device\n");
656 }
657
658 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100659 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 bits &= ~BITS_STOP_MASK;
661 if (cflag & CSTOPB) {
662 bits |= BITS_STOP_2;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800663 dbg("%s - stop bits = 2", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 } else {
665 bits |= BITS_STOP_1;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800666 dbg("%s - stop bits = 1", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 }
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100668 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
Craig Shelley97324952009-02-26 22:21:51 +0000669 dbg("Number of stop bits requested "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 "not supported by device\n");
671 }
Craig Shelley39a66b82005-05-27 00:09:56 +0100672
673 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100674 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100675 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800676 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100677 modem_ctl[2], modem_ctl[3]);
678
679 if (cflag & CRTSCTS) {
680 modem_ctl[0] &= ~0x7B;
681 modem_ctl[0] |= 0x09;
682 modem_ctl[1] = 0x80;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800683 dbg("%s - flow control = CRTSCTS", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100684 } else {
685 modem_ctl[0] &= ~0x7B;
686 modem_ctl[0] |= 0x01;
687 modem_ctl[1] |= 0x40;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800688 dbg("%s - flow control = NONE", __func__);
Craig Shelley39a66b82005-05-27 00:09:56 +0100689 }
690
691 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800692 __func__, modem_ctl[0], modem_ctl[1],
Craig Shelley39a66b82005-05-27 00:09:56 +0100693 modem_ctl[2], modem_ctl[3]);
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100694 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
Craig Shelley39a66b82005-05-27 00:09:56 +0100695 }
696
697}
698
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100699static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
Craig Shelley39a66b82005-05-27 00:09:56 +0100700 unsigned int set, unsigned int clear)
701{
Alan Cox95da3102008-07-22 11:09:07 +0100702 struct usb_serial_port *port = tty->driver_data;
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100703 return cp210x_tiocmset_port(port, file, set, clear);
VomLehnd2ad67b2009-03-12 14:37:42 -0700704}
705
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100706static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
VomLehnd2ad67b2009-03-12 14:37:42 -0700707 unsigned int set, unsigned int clear)
708{
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700709 unsigned int control = 0;
Craig Shelley39a66b82005-05-27 00:09:56 +0100710
Harvey Harrison441b62c2008-03-03 16:08:34 -0800711 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100712
713 if (set & TIOCM_RTS) {
714 control |= CONTROL_RTS;
715 control |= CONTROL_WRITE_RTS;
716 }
717 if (set & TIOCM_DTR) {
718 control |= CONTROL_DTR;
719 control |= CONTROL_WRITE_DTR;
720 }
721 if (clear & TIOCM_RTS) {
722 control &= ~CONTROL_RTS;
723 control |= CONTROL_WRITE_RTS;
724 }
725 if (clear & TIOCM_DTR) {
726 control &= ~CONTROL_DTR;
727 control |= CONTROL_WRITE_DTR;
728 }
729
Harvey Harrison441b62c2008-03-03 16:08:34 -0800730 dbg("%s - control = 0x%.4x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100731
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100732 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
Craig Shelley39a66b82005-05-27 00:09:56 +0100733}
734
Alan Coxd94c7bd2009-10-28 21:12:33 +0100735static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
736{
737 if (on)
738 cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0);
739 else
740 cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS);
741}
742
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100743static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
Craig Shelley39a66b82005-05-27 00:09:56 +0100744{
Alan Cox95da3102008-07-22 11:09:07 +0100745 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700746 unsigned int control;
747 int result;
Craig Shelley39a66b82005-05-27 00:09:56 +0100748
Harvey Harrison441b62c2008-03-03 16:08:34 -0800749 dbg("%s - port %d", __func__, port->number);
Craig Shelley39a66b82005-05-27 00:09:56 +0100750
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100751 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
Craig Shelley39a66b82005-05-27 00:09:56 +0100752
753 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
754 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
755 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
756 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
757 |((control & CONTROL_RING)? TIOCM_RI : 0)
758 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
759
Harvey Harrison441b62c2008-03-03 16:08:34 -0800760 dbg("%s - control = 0x%.2x", __func__, control);
Craig Shelley39a66b82005-05-27 00:09:56 +0100761
762 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763}
764
Alan Coxd94c7bd2009-10-28 21:12:33 +0100765static int cp210x_carrier_raised(struct usb_serial_port *p)
766{
767 unsigned int control;
768 cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
769 if (control & CONTROL_DCD)
770 return 1;
771 return 0;
772}
773
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100774static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775{
Alan Cox95da3102008-07-22 11:09:07 +0100776 struct usb_serial_port *port = tty->driver_data;
Harvey Harrisonb2bdd1f2008-05-30 10:29:55 -0700777 unsigned int state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
Harvey Harrison441b62c2008-03-03 16:08:34 -0800779 dbg("%s - port %d", __func__, port->number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 if (break_state == 0)
781 state = BREAK_OFF;
782 else
783 state = BREAK_ON;
Harvey Harrison441b62c2008-03-03 16:08:34 -0800784 dbg("%s - turning break %s", __func__,
Alan Coxff7eb602008-07-22 11:10:17 +0100785 state == BREAK_OFF ? "off" : "on");
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100786 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787}
788
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100789static int cp210x_startup(struct usb_serial *serial)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100791 /* cp210x buffers behave strangely unless device is reset */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 usb_reset_device(serial->dev);
793 return 0;
794}
795
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100796static int __init cp210x_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797{
798 int retval;
799
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100800 retval = usb_serial_register(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 if (retval)
Craig Shelley39a66b82005-05-27 00:09:56 +0100802 return retval; /* Failed to register */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100804 retval = usb_register(&cp210x_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 if (retval) {
Craig Shelley39a66b82005-05-27 00:09:56 +0100806 /* Failed to register */
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100807 usb_serial_deregister(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return retval;
809 }
810
Craig Shelley39a66b82005-05-27 00:09:56 +0100811 /* Success */
Greg Kroah-Hartmanc197a8d2008-08-18 13:21:04 -0700812 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
813 DRIVER_DESC "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 return 0;
815}
816
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100817static void __exit cp210x_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818{
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100819 usb_deregister(&cp210x_driver);
820 usb_serial_deregister(&cp210x_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821}
822
Craig Shelley4cc27bd2009-06-11 13:54:40 +0100823module_init(cp210x_init);
824module_exit(cp210x_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826MODULE_DESCRIPTION(DRIVER_DESC);
827MODULE_VERSION(DRIVER_VERSION);
828MODULE_LICENSE("GPL");
829
830module_param(debug, bool, S_IRUGO | S_IWUSR);
831MODULE_PARM_DESC(debug, "Enable verbose debugging messages");