847 lines
25 KiB
C
847 lines
25 KiB
C
/*
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* Silicon Laboratories CP210x USB to RS232 serial adaptor driver
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*
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* Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* Support to set flow control line levels using TIOCMGET and TIOCMSET
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* thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
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* control thanks to Munir Nassar nassarmu@real-time.com
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/usb.h>
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#include <linux/uaccess.h>
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#include <linux/usb/serial.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v0.09"
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#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
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/*
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* Function Prototypes
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*/
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static int cp210x_open(struct tty_struct *, struct usb_serial_port *,
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struct file *);
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static void cp210x_cleanup(struct usb_serial_port *);
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static void cp210x_close(struct usb_serial_port *);
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static void cp210x_get_termios(struct tty_struct *,
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struct usb_serial_port *port);
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static void cp210x_get_termios_port(struct usb_serial_port *port,
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unsigned int *cflagp, unsigned int *baudp);
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static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
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struct ktermios*);
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static int cp210x_tiocmget(struct tty_struct *, struct file *);
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static int cp210x_tiocmset(struct tty_struct *, struct file *,
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unsigned int, unsigned int);
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static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
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unsigned int, unsigned int);
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static void cp210x_break_ctl(struct tty_struct *, int);
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static int cp210x_startup(struct usb_serial *);
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static void cp210x_disconnect(struct usb_serial *);
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static int debug;
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
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{ USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
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{ USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
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{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
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{ USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
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{ USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
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{ USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
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{ USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
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{ USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
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{ USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
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{ USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
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{ USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
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{ USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
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{ USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
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{ USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
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{ USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
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{ USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
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{ USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
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{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
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{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
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{ USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
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{ USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
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{ USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
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{ USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
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{ USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
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{ USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
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{ USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
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{ USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
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{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
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{ USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
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{ USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
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{ USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
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{ USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
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{ USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
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{ USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
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{ USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
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{ USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
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{ USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
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{ USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
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{ USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
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{ USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
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{ USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
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{ USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
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{ USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
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{ USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
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{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
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{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
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{ USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
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{ USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
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{ USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
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{ USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
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{ USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
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{ USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
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{ USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
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{ USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
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{ USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
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{ USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
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{ USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
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{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
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{ } /* Terminating Entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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static struct usb_driver cp210x_driver = {
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.name = "cp210x",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table,
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.no_dynamic_id = 1,
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};
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static struct usb_serial_driver cp210x_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "cp210x",
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},
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.usb_driver = &cp210x_driver,
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.id_table = id_table,
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.num_ports = 1,
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.open = cp210x_open,
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.close = cp210x_close,
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.break_ctl = cp210x_break_ctl,
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.set_termios = cp210x_set_termios,
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.tiocmget = cp210x_tiocmget,
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.tiocmset = cp210x_tiocmset,
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.attach = cp210x_startup,
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.disconnect = cp210x_disconnect,
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};
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/* Config request types */
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#define REQTYPE_HOST_TO_DEVICE 0x41
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#define REQTYPE_DEVICE_TO_HOST 0xc1
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/* Config request codes */
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#define CP210X_IFC_ENABLE 0x00
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#define CP210X_SET_BAUDDIV 0x01
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#define CP210X_GET_BAUDDIV 0x02
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#define CP210X_SET_LINE_CTL 0x03
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#define CP210X_GET_LINE_CTL 0x04
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#define CP210X_SET_BREAK 0x05
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#define CP210X_IMM_CHAR 0x06
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#define CP210X_SET_MHS 0x07
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#define CP210X_GET_MDMSTS 0x08
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#define CP210X_SET_XON 0x09
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#define CP210X_SET_XOFF 0x0A
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#define CP210X_SET_EVENTMASK 0x0B
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#define CP210X_GET_EVENTMASK 0x0C
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#define CP210X_SET_CHAR 0x0D
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#define CP210X_GET_CHARS 0x0E
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#define CP210X_GET_PROPS 0x0F
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#define CP210X_GET_COMM_STATUS 0x10
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#define CP210X_RESET 0x11
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#define CP210X_PURGE 0x12
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#define CP210X_SET_FLOW 0x13
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#define CP210X_GET_FLOW 0x14
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#define CP210X_EMBED_EVENTS 0x15
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#define CP210X_GET_EVENTSTATE 0x16
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#define CP210X_SET_CHARS 0x19
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/* CP210X_IFC_ENABLE */
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#define UART_ENABLE 0x0001
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#define UART_DISABLE 0x0000
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/* CP210X_(SET|GET)_BAUDDIV */
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#define BAUD_RATE_GEN_FREQ 0x384000
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/* CP210X_(SET|GET)_LINE_CTL */
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#define BITS_DATA_MASK 0X0f00
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#define BITS_DATA_5 0X0500
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#define BITS_DATA_6 0X0600
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#define BITS_DATA_7 0X0700
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#define BITS_DATA_8 0X0800
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#define BITS_DATA_9 0X0900
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#define BITS_PARITY_MASK 0x00f0
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#define BITS_PARITY_NONE 0x0000
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#define BITS_PARITY_ODD 0x0010
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#define BITS_PARITY_EVEN 0x0020
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#define BITS_PARITY_MARK 0x0030
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#define BITS_PARITY_SPACE 0x0040
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#define BITS_STOP_MASK 0x000f
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#define BITS_STOP_1 0x0000
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#define BITS_STOP_1_5 0x0001
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#define BITS_STOP_2 0x0002
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/* CP210X_SET_BREAK */
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#define BREAK_ON 0x0000
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#define BREAK_OFF 0x0001
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/* CP210X_(SET_MHS|GET_MDMSTS) */
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#define CONTROL_DTR 0x0001
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#define CONTROL_RTS 0x0002
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#define CONTROL_CTS 0x0010
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#define CONTROL_DSR 0x0020
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#define CONTROL_RING 0x0040
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#define CONTROL_DCD 0x0080
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#define CONTROL_WRITE_DTR 0x0100
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#define CONTROL_WRITE_RTS 0x0200
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/*
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* cp210x_get_config
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* Reads from the CP210x configuration registers
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* 'size' is specified in bytes.
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* 'data' is a pointer to a pre-allocated array of integers large
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* enough to hold 'size' bytes (with 4 bytes to each integer)
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*/
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static int cp210x_get_config(struct usb_serial_port *port, u8 request,
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unsigned int *data, int size)
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{
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struct usb_serial *serial = port->serial;
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__le32 *buf;
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int result, i, length;
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/* Number of integers required to contain the array */
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length = (((size - 1) | 3) + 1)/4;
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buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
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if (!buf) {
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dev_err(&port->dev, "%s - out of memory.\n", __func__);
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return -ENOMEM;
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}
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/* Issue the request, attempting to read 'size' bytes */
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result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
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request, REQTYPE_DEVICE_TO_HOST, 0x0000,
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0, buf, size, 300);
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/* Convert data into an array of integers */
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for (i = 0; i < length; i++)
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data[i] = le32_to_cpu(buf[i]);
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kfree(buf);
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if (result != size) {
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dbg("%s - Unable to send config request, "
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"request=0x%x size=%d result=%d\n",
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__func__, request, size, result);
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return -EPROTO;
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}
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return 0;
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}
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/*
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* cp210x_set_config
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* Writes to the CP210x configuration registers
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* Values less than 16 bits wide are sent directly
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* 'size' is specified in bytes.
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*/
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static int cp210x_set_config(struct usb_serial_port *port, u8 request,
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unsigned int *data, int size)
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{
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struct usb_serial *serial = port->serial;
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__le32 *buf;
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int result, i, length;
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/* Number of integers required to contain the array */
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length = (((size - 1) | 3) + 1)/4;
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buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
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if (!buf) {
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dev_err(&port->dev, "%s - out of memory.\n",
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__func__);
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return -ENOMEM;
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}
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/* Array of integers into bytes */
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for (i = 0; i < length; i++)
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buf[i] = cpu_to_le32(data[i]);
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if (size > 2) {
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result = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev, 0),
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request, REQTYPE_HOST_TO_DEVICE, 0x0000,
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0, buf, size, 300);
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} else {
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result = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev, 0),
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request, REQTYPE_HOST_TO_DEVICE, data[0],
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0, NULL, 0, 300);
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}
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kfree(buf);
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if ((size > 2 && result != size) || result < 0) {
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dbg("%s - Unable to send request, "
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"request=0x%x size=%d result=%d\n",
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__func__, request, size, result);
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return -EPROTO;
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}
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/* Single data value */
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result = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev, 0),
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request, REQTYPE_HOST_TO_DEVICE, data[0],
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0, NULL, 0, 300);
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return 0;
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}
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/*
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* cp210x_set_config_single
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* Convenience function for calling cp210x_set_config on single data values
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* without requiring an integer pointer
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*/
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static inline int cp210x_set_config_single(struct usb_serial_port *port,
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u8 request, unsigned int data)
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{
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return cp210x_set_config(port, request, &data, 2);
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}
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/*
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* cp210x_quantise_baudrate
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* Quantises the baud rate as per AN205 Table 1
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*/
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static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
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if (baud <= 56) baud = 0;
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else if (baud <= 300) baud = 300;
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else if (baud <= 600) baud = 600;
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else if (baud <= 1200) baud = 1200;
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else if (baud <= 1800) baud = 1800;
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else if (baud <= 2400) baud = 2400;
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else if (baud <= 4000) baud = 4000;
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else if (baud <= 4803) baud = 4800;
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else if (baud <= 7207) baud = 7200;
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else if (baud <= 9612) baud = 9600;
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else if (baud <= 14428) baud = 14400;
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else if (baud <= 16062) baud = 16000;
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else if (baud <= 19250) baud = 19200;
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else if (baud <= 28912) baud = 28800;
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else if (baud <= 38601) baud = 38400;
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else if (baud <= 51558) baud = 51200;
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else if (baud <= 56280) baud = 56000;
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else if (baud <= 58053) baud = 57600;
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else if (baud <= 64111) baud = 64000;
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else if (baud <= 77608) baud = 76800;
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else if (baud <= 117028) baud = 115200;
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else if (baud <= 129347) baud = 128000;
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else if (baud <= 156868) baud = 153600;
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else if (baud <= 237832) baud = 230400;
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else if (baud <= 254234) baud = 250000;
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else if (baud <= 273066) baud = 256000;
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else if (baud <= 491520) baud = 460800;
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else if (baud <= 567138) baud = 500000;
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else if (baud <= 670254) baud = 576000;
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else if (baud <= 1053257) baud = 921600;
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else if (baud <= 1474560) baud = 1228800;
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else if (baud <= 2457600) baud = 1843200;
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else baud = 3686400;
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return baud;
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}
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static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port,
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struct file *filp)
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{
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struct usb_serial *serial = port->serial;
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int result;
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dbg("%s - port %d", __func__, port->number);
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if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
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dev_err(&port->dev, "%s - Unable to enable UART\n",
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__func__);
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return -EPROTO;
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}
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/* Start reading from the device */
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usb_fill_bulk_urb(port->read_urb, serial->dev,
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usb_rcvbulkpipe(serial->dev,
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port->bulk_in_endpointAddress),
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port->read_urb->transfer_buffer,
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port->read_urb->transfer_buffer_length,
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serial->type->read_bulk_callback,
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port);
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result = usb_submit_urb(port->read_urb, GFP_KERNEL);
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if (result) {
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dev_err(&port->dev, "%s - failed resubmitting read urb, "
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"error %d\n", __func__, result);
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return result;
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}
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/* Configure the termios structure */
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cp210x_get_termios(tty, port);
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/* Set the DTR and RTS pins low */
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cp210x_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data
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: port,
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NULL, TIOCM_DTR | TIOCM_RTS, 0);
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return 0;
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}
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static void cp210x_cleanup(struct usb_serial_port *port)
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{
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struct usb_serial *serial = port->serial;
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|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
if (serial->dev) {
|
|
/* shutdown any bulk reads that might be going on */
|
|
if (serial->num_bulk_out)
|
|
usb_kill_urb(port->write_urb);
|
|
if (serial->num_bulk_in)
|
|
usb_kill_urb(port->read_urb);
|
|
}
|
|
}
|
|
|
|
static void cp210x_close(struct usb_serial_port *port)
|
|
{
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
/* shutdown our urbs */
|
|
dbg("%s - shutting down urbs", __func__);
|
|
usb_kill_urb(port->write_urb);
|
|
usb_kill_urb(port->read_urb);
|
|
|
|
mutex_lock(&port->serial->disc_mutex);
|
|
if (!port->serial->disconnected)
|
|
cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
|
|
mutex_unlock(&port->serial->disc_mutex);
|
|
}
|
|
|
|
/*
|
|
* cp210x_get_termios
|
|
* Reads the baud rate, data bits, parity, stop bits and flow control mode
|
|
* from the device, corrects any unsupported values, and configures the
|
|
* termios structure to reflect the state of the device
|
|
*/
|
|
static void cp210x_get_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port)
|
|
{
|
|
unsigned int baud;
|
|
|
|
if (tty) {
|
|
cp210x_get_termios_port(tty->driver_data,
|
|
&tty->termios->c_cflag, &baud);
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
}
|
|
|
|
else {
|
|
unsigned int cflag;
|
|
cflag = 0;
|
|
cp210x_get_termios_port(port, &cflag, &baud);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* cp210x_get_termios_port
|
|
* This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
|
|
*/
|
|
static void cp210x_get_termios_port(struct usb_serial_port *port,
|
|
unsigned int *cflagp, unsigned int *baudp)
|
|
{
|
|
unsigned int cflag, modem_ctl[4];
|
|
unsigned int baud;
|
|
unsigned int bits;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
|
|
/* Convert to baudrate */
|
|
if (baud)
|
|
baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
|
|
|
|
dbg("%s - baud rate = %d", __func__, baud);
|
|
*baudp = baud;
|
|
|
|
cflag = *cflagp;
|
|
|
|
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
|
|
cflag &= ~CSIZE;
|
|
switch (bits & BITS_DATA_MASK) {
|
|
case BITS_DATA_5:
|
|
dbg("%s - data bits = 5", __func__);
|
|
cflag |= CS5;
|
|
break;
|
|
case BITS_DATA_6:
|
|
dbg("%s - data bits = 6", __func__);
|
|
cflag |= CS6;
|
|
break;
|
|
case BITS_DATA_7:
|
|
dbg("%s - data bits = 7", __func__);
|
|
cflag |= CS7;
|
|
break;
|
|
case BITS_DATA_8:
|
|
dbg("%s - data bits = 8", __func__);
|
|
cflag |= CS8;
|
|
break;
|
|
case BITS_DATA_9:
|
|
dbg("%s - data bits = 9 (not supported, using 8 data bits)",
|
|
__func__);
|
|
cflag |= CS8;
|
|
bits &= ~BITS_DATA_MASK;
|
|
bits |= BITS_DATA_8;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
default:
|
|
dbg("%s - Unknown number of data bits, using 8", __func__);
|
|
cflag |= CS8;
|
|
bits &= ~BITS_DATA_MASK;
|
|
bits |= BITS_DATA_8;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
}
|
|
|
|
switch (bits & BITS_PARITY_MASK) {
|
|
case BITS_PARITY_NONE:
|
|
dbg("%s - parity = NONE", __func__);
|
|
cflag &= ~PARENB;
|
|
break;
|
|
case BITS_PARITY_ODD:
|
|
dbg("%s - parity = ODD", __func__);
|
|
cflag |= (PARENB|PARODD);
|
|
break;
|
|
case BITS_PARITY_EVEN:
|
|
dbg("%s - parity = EVEN", __func__);
|
|
cflag &= ~PARODD;
|
|
cflag |= PARENB;
|
|
break;
|
|
case BITS_PARITY_MARK:
|
|
dbg("%s - parity = MARK (not supported, disabling parity)",
|
|
__func__);
|
|
cflag &= ~PARENB;
|
|
bits &= ~BITS_PARITY_MASK;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
case BITS_PARITY_SPACE:
|
|
dbg("%s - parity = SPACE (not supported, disabling parity)",
|
|
__func__);
|
|
cflag &= ~PARENB;
|
|
bits &= ~BITS_PARITY_MASK;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
default:
|
|
dbg("%s - Unknown parity mode, disabling parity", __func__);
|
|
cflag &= ~PARENB;
|
|
bits &= ~BITS_PARITY_MASK;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
}
|
|
|
|
cflag &= ~CSTOPB;
|
|
switch (bits & BITS_STOP_MASK) {
|
|
case BITS_STOP_1:
|
|
dbg("%s - stop bits = 1", __func__);
|
|
break;
|
|
case BITS_STOP_1_5:
|
|
dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
|
|
__func__);
|
|
bits &= ~BITS_STOP_MASK;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
case BITS_STOP_2:
|
|
dbg("%s - stop bits = 2", __func__);
|
|
cflag |= CSTOPB;
|
|
break;
|
|
default:
|
|
dbg("%s - Unknown number of stop bits, using 1 stop bit",
|
|
__func__);
|
|
bits &= ~BITS_STOP_MASK;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
}
|
|
|
|
cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
|
|
if (modem_ctl[0] & 0x0008) {
|
|
dbg("%s - flow control = CRTSCTS", __func__);
|
|
cflag |= CRTSCTS;
|
|
} else {
|
|
dbg("%s - flow control = NONE", __func__);
|
|
cflag &= ~CRTSCTS;
|
|
}
|
|
|
|
*cflagp = cflag;
|
|
}
|
|
|
|
static void cp210x_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old_termios)
|
|
{
|
|
unsigned int cflag, old_cflag;
|
|
unsigned int baud = 0, bits;
|
|
unsigned int modem_ctl[4];
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
if (!tty)
|
|
return;
|
|
|
|
tty->termios->c_cflag &= ~CMSPAR;
|
|
cflag = tty->termios->c_cflag;
|
|
old_cflag = old_termios->c_cflag;
|
|
baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
|
|
|
|
/* If the baud rate is to be updated*/
|
|
if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
|
|
dbg("%s - Setting baud rate to %d baud", __func__,
|
|
baud);
|
|
if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
|
|
((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
|
|
dbg("Baud rate requested not supported by device\n");
|
|
baud = tty_termios_baud_rate(old_termios);
|
|
}
|
|
}
|
|
/* Report back the resulting baud rate */
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
|
|
/* If the number of data bits is to be updated */
|
|
if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
|
|
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
|
|
bits &= ~BITS_DATA_MASK;
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
bits |= BITS_DATA_5;
|
|
dbg("%s - data bits = 5", __func__);
|
|
break;
|
|
case CS6:
|
|
bits |= BITS_DATA_6;
|
|
dbg("%s - data bits = 6", __func__);
|
|
break;
|
|
case CS7:
|
|
bits |= BITS_DATA_7;
|
|
dbg("%s - data bits = 7", __func__);
|
|
break;
|
|
case CS8:
|
|
bits |= BITS_DATA_8;
|
|
dbg("%s - data bits = 8", __func__);
|
|
break;
|
|
/*case CS9:
|
|
bits |= BITS_DATA_9;
|
|
dbg("%s - data bits = 9", __func__);
|
|
break;*/
|
|
default:
|
|
dbg("cp210x driver does not "
|
|
"support the number of bits requested,"
|
|
" using 8 bit mode\n");
|
|
bits |= BITS_DATA_8;
|
|
break;
|
|
}
|
|
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
|
|
dbg("Number of data bits requested "
|
|
"not supported by device\n");
|
|
}
|
|
|
|
if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
|
|
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
|
|
bits &= ~BITS_PARITY_MASK;
|
|
if (cflag & PARENB) {
|
|
if (cflag & PARODD) {
|
|
bits |= BITS_PARITY_ODD;
|
|
dbg("%s - parity = ODD", __func__);
|
|
} else {
|
|
bits |= BITS_PARITY_EVEN;
|
|
dbg("%s - parity = EVEN", __func__);
|
|
}
|
|
}
|
|
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
|
|
dbg("Parity mode not supported "
|
|
"by device\n");
|
|
}
|
|
|
|
if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
|
|
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
|
|
bits &= ~BITS_STOP_MASK;
|
|
if (cflag & CSTOPB) {
|
|
bits |= BITS_STOP_2;
|
|
dbg("%s - stop bits = 2", __func__);
|
|
} else {
|
|
bits |= BITS_STOP_1;
|
|
dbg("%s - stop bits = 1", __func__);
|
|
}
|
|
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
|
|
dbg("Number of stop bits requested "
|
|
"not supported by device\n");
|
|
}
|
|
|
|
if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
|
|
cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
|
|
dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
|
|
__func__, modem_ctl[0], modem_ctl[1],
|
|
modem_ctl[2], modem_ctl[3]);
|
|
|
|
if (cflag & CRTSCTS) {
|
|
modem_ctl[0] &= ~0x7B;
|
|
modem_ctl[0] |= 0x09;
|
|
modem_ctl[1] = 0x80;
|
|
dbg("%s - flow control = CRTSCTS", __func__);
|
|
} else {
|
|
modem_ctl[0] &= ~0x7B;
|
|
modem_ctl[0] |= 0x01;
|
|
modem_ctl[1] |= 0x40;
|
|
dbg("%s - flow control = NONE", __func__);
|
|
}
|
|
|
|
dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
|
|
__func__, modem_ctl[0], modem_ctl[1],
|
|
modem_ctl[2], modem_ctl[3]);
|
|
cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
|
|
}
|
|
|
|
}
|
|
|
|
static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
return cp210x_tiocmset_port(port, file, set, clear);
|
|
}
|
|
|
|
static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
unsigned int control = 0;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
if (set & TIOCM_RTS) {
|
|
control |= CONTROL_RTS;
|
|
control |= CONTROL_WRITE_RTS;
|
|
}
|
|
if (set & TIOCM_DTR) {
|
|
control |= CONTROL_DTR;
|
|
control |= CONTROL_WRITE_DTR;
|
|
}
|
|
if (clear & TIOCM_RTS) {
|
|
control &= ~CONTROL_RTS;
|
|
control |= CONTROL_WRITE_RTS;
|
|
}
|
|
if (clear & TIOCM_DTR) {
|
|
control &= ~CONTROL_DTR;
|
|
control |= CONTROL_WRITE_DTR;
|
|
}
|
|
|
|
dbg("%s - control = 0x%.4x", __func__, control);
|
|
|
|
return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
|
|
}
|
|
|
|
static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
unsigned int control;
|
|
int result;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
|
|
|
|
result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
|
|
|((control & CONTROL_RTS) ? TIOCM_RTS : 0)
|
|
|((control & CONTROL_CTS) ? TIOCM_CTS : 0)
|
|
|((control & CONTROL_DSR) ? TIOCM_DSR : 0)
|
|
|((control & CONTROL_RING)? TIOCM_RI : 0)
|
|
|((control & CONTROL_DCD) ? TIOCM_CD : 0);
|
|
|
|
dbg("%s - control = 0x%.2x", __func__, control);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
unsigned int state;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
if (break_state == 0)
|
|
state = BREAK_OFF;
|
|
else
|
|
state = BREAK_ON;
|
|
dbg("%s - turning break %s", __func__,
|
|
state == BREAK_OFF ? "off" : "on");
|
|
cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
|
|
}
|
|
|
|
static int cp210x_startup(struct usb_serial *serial)
|
|
{
|
|
/* cp210x buffers behave strangely unless device is reset */
|
|
usb_reset_device(serial->dev);
|
|
return 0;
|
|
}
|
|
|
|
static void cp210x_disconnect(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
|
|
dbg("%s", __func__);
|
|
|
|
/* Stop reads and writes on all ports */
|
|
for (i = 0; i < serial->num_ports; ++i)
|
|
cp210x_cleanup(serial->port[i]);
|
|
}
|
|
|
|
static int __init cp210x_init(void)
|
|
{
|
|
int retval;
|
|
|
|
retval = usb_serial_register(&cp210x_device);
|
|
if (retval)
|
|
return retval; /* Failed to register */
|
|
|
|
retval = usb_register(&cp210x_driver);
|
|
if (retval) {
|
|
/* Failed to register */
|
|
usb_serial_deregister(&cp210x_device);
|
|
return retval;
|
|
}
|
|
|
|
/* Success */
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
return 0;
|
|
}
|
|
|
|
static void __exit cp210x_exit(void)
|
|
{
|
|
usb_deregister(&cp210x_driver);
|
|
usb_serial_deregister(&cp210x_device);
|
|
}
|
|
|
|
module_init(cp210x_init);
|
|
module_exit(cp210x_exit);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Enable verbose debugging messages");
|