872 lines
28 KiB
C
872 lines
28 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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#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 *tty, 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 *, struct usb_serial_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_change_speed(struct tty_struct *, struct usb_serial_port *,
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struct ktermios *);
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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 *);
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static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
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static int cp210x_tiocmset_port(struct usb_serial_port *port,
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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_release(struct usb_serial *);
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static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
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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(0x0489, 0xE003) }, /* 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(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
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{ USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
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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, 0x8044) }, /* Cygnal Debug Adapter */
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{ USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in 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, 0x806F) }, /* IMS USB to RS422 Converter Cable */
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{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
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{ USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
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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, 0x8156) }, /* B&G H3000 link cable */
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{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
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{ USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
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{ USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
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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, 0x81A9) }, /* Multiplex RC Interface */
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{ USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
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{ USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
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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, 0x81E8) }, /* Zephyr Bioharness */
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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 demonstration module */
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{ USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis 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, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
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{ USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
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{ USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
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{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
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{ USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
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{ USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
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{ USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
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{ USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
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{ USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
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{ USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
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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, 0xEA70) }, /* Silicon Labs factory default */
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{ USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
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{ USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
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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, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
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{ USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
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{ USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
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{ USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
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{ USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
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{ USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
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{ USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
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{ USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
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{ USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
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{ USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
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{ USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
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{ USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
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{ USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
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{ USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
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{ USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
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{ USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
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{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
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{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
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{ USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
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{ USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
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{ USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
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{ USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
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{ USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
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{ USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB 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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struct cp210x_serial_private {
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__u8 bInterfaceNumber;
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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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.id_table = id_table,
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.num_ports = 1,
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.bulk_in_size = 256,
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.bulk_out_size = 256,
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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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.release = cp210x_release,
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.dtr_rts = cp210x_dtr_rts
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};
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static struct usb_serial_driver * const serial_drivers[] = {
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&cp210x_device, NULL
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};
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/* Config request types */
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#define REQTYPE_HOST_TO_INTERFACE 0x41
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#define REQTYPE_INTERFACE_TO_HOST 0xc1
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#define REQTYPE_HOST_TO_DEVICE 0x40
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#define REQTYPE_DEVICE_TO_HOST 0xc0
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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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#define CP210X_GET_BAUDRATE 0x1D
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#define CP210X_SET_BAUDRATE 0x1E
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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 0x0001
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#define BREAK_OFF 0x0000
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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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struct cp210x_serial_private *spriv = usb_get_serial_data(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_INTERFACE_TO_HOST, 0x0000,
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spriv->bInterfaceNumber, buf, size,
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USB_CTRL_GET_TIMEOUT);
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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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dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
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__func__, request, size, result);
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if (result > 0)
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result = -EPROTO;
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return result;
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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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struct cp210x_serial_private *spriv = usb_get_serial_data(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", __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_INTERFACE, 0x0000,
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spriv->bInterfaceNumber, buf, size,
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USB_CTRL_SET_TIMEOUT);
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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_INTERFACE, data[0],
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spriv->bInterfaceNumber, NULL, 0,
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USB_CTRL_SET_TIMEOUT);
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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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dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
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__func__, request, size, result);
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if (result > 0)
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result = -EPROTO;
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|
|
|
return result;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* cp210x_set_config_single
|
|
* Convenience function for calling cp210x_set_config on single data values
|
|
* without requiring an integer pointer
|
|
*/
|
|
static inline int cp210x_set_config_single(struct usb_serial_port *port,
|
|
u8 request, unsigned int data)
|
|
{
|
|
return cp210x_set_config(port, request, &data, 2);
|
|
}
|
|
|
|
/*
|
|
* cp210x_quantise_baudrate
|
|
* Quantises the baud rate as per AN205 Table 1
|
|
*/
|
|
static unsigned int cp210x_quantise_baudrate(unsigned int baud)
|
|
{
|
|
if (baud <= 300)
|
|
baud = 300;
|
|
else if (baud <= 600) baud = 600;
|
|
else if (baud <= 1200) baud = 1200;
|
|
else if (baud <= 1800) baud = 1800;
|
|
else if (baud <= 2400) baud = 2400;
|
|
else if (baud <= 4000) baud = 4000;
|
|
else if (baud <= 4803) baud = 4800;
|
|
else if (baud <= 7207) baud = 7200;
|
|
else if (baud <= 9612) baud = 9600;
|
|
else if (baud <= 14428) baud = 14400;
|
|
else if (baud <= 16062) baud = 16000;
|
|
else if (baud <= 19250) baud = 19200;
|
|
else if (baud <= 28912) baud = 28800;
|
|
else if (baud <= 38601) baud = 38400;
|
|
else if (baud <= 51558) baud = 51200;
|
|
else if (baud <= 56280) baud = 56000;
|
|
else if (baud <= 58053) baud = 57600;
|
|
else if (baud <= 64111) baud = 64000;
|
|
else if (baud <= 77608) baud = 76800;
|
|
else if (baud <= 117028) baud = 115200;
|
|
else if (baud <= 129347) baud = 128000;
|
|
else if (baud <= 156868) baud = 153600;
|
|
else if (baud <= 237832) baud = 230400;
|
|
else if (baud <= 254234) baud = 250000;
|
|
else if (baud <= 273066) baud = 256000;
|
|
else if (baud <= 491520) baud = 460800;
|
|
else if (baud <= 567138) baud = 500000;
|
|
else if (baud <= 670254) baud = 576000;
|
|
else if (baud < 1000000)
|
|
baud = 921600;
|
|
else if (baud > 2000000)
|
|
baud = 2000000;
|
|
return baud;
|
|
}
|
|
|
|
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
int result;
|
|
|
|
result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
|
|
UART_ENABLE);
|
|
if (result) {
|
|
dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
|
|
return result;
|
|
}
|
|
|
|
/* Configure the termios structure */
|
|
cp210x_get_termios(tty, port);
|
|
|
|
/* The baud rate must be initialised on cp2104 */
|
|
if (tty)
|
|
cp210x_change_speed(tty, port, NULL);
|
|
|
|
return usb_serial_generic_open(tty, port);
|
|
}
|
|
|
|
static void cp210x_close(struct usb_serial_port *port)
|
|
{
|
|
usb_serial_generic_close(port);
|
|
|
|
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)
|
|
{
|
|
struct device *dev = &port->dev;
|
|
unsigned int cflag, modem_ctl[4];
|
|
unsigned int baud;
|
|
unsigned int bits;
|
|
|
|
cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
|
|
|
|
dev_dbg(dev, "%s - baud rate = %d\n", __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:
|
|
dev_dbg(dev, "%s - data bits = 5\n", __func__);
|
|
cflag |= CS5;
|
|
break;
|
|
case BITS_DATA_6:
|
|
dev_dbg(dev, "%s - data bits = 6\n", __func__);
|
|
cflag |= CS6;
|
|
break;
|
|
case BITS_DATA_7:
|
|
dev_dbg(dev, "%s - data bits = 7\n", __func__);
|
|
cflag |= CS7;
|
|
break;
|
|
case BITS_DATA_8:
|
|
dev_dbg(dev, "%s - data bits = 8\n", __func__);
|
|
cflag |= CS8;
|
|
break;
|
|
case BITS_DATA_9:
|
|
dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
|
|
cflag |= CS8;
|
|
bits &= ~BITS_DATA_MASK;
|
|
bits |= BITS_DATA_8;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
default:
|
|
dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __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:
|
|
dev_dbg(dev, "%s - parity = NONE\n", __func__);
|
|
cflag &= ~PARENB;
|
|
break;
|
|
case BITS_PARITY_ODD:
|
|
dev_dbg(dev, "%s - parity = ODD\n", __func__);
|
|
cflag |= (PARENB|PARODD);
|
|
break;
|
|
case BITS_PARITY_EVEN:
|
|
dev_dbg(dev, "%s - parity = EVEN\n", __func__);
|
|
cflag &= ~PARODD;
|
|
cflag |= PARENB;
|
|
break;
|
|
case BITS_PARITY_MARK:
|
|
dev_dbg(dev, "%s - parity = MARK\n", __func__);
|
|
cflag |= (PARENB|PARODD|CMSPAR);
|
|
break;
|
|
case BITS_PARITY_SPACE:
|
|
dev_dbg(dev, "%s - parity = SPACE\n", __func__);
|
|
cflag &= ~PARODD;
|
|
cflag |= (PARENB|CMSPAR);
|
|
break;
|
|
default:
|
|
dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __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:
|
|
dev_dbg(dev, "%s - stop bits = 1\n", __func__);
|
|
break;
|
|
case BITS_STOP_1_5:
|
|
dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
|
|
bits &= ~BITS_STOP_MASK;
|
|
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
|
|
break;
|
|
case BITS_STOP_2:
|
|
dev_dbg(dev, "%s - stop bits = 2\n", __func__);
|
|
cflag |= CSTOPB;
|
|
break;
|
|
default:
|
|
dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __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) {
|
|
dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
|
|
cflag |= CRTSCTS;
|
|
} else {
|
|
dev_dbg(dev, "%s - flow control = NONE\n", __func__);
|
|
cflag &= ~CRTSCTS;
|
|
}
|
|
|
|
*cflagp = cflag;
|
|
}
|
|
|
|
/*
|
|
* CP2101 supports the following baud rates:
|
|
*
|
|
* 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
|
|
* 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
|
|
*
|
|
* CP2102 and CP2103 support the following additional rates:
|
|
*
|
|
* 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
|
|
* 576000
|
|
*
|
|
* The device will map a requested rate to a supported one, but the result
|
|
* of requests for rates greater than 1053257 is undefined (see AN205).
|
|
*
|
|
* CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
|
|
* respectively, with an error less than 1%. The actual rates are determined
|
|
* by
|
|
*
|
|
* div = round(freq / (2 x prescale x request))
|
|
* actual = freq / (2 x prescale x div)
|
|
*
|
|
* For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
|
|
* or 1 otherwise.
|
|
* For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
|
|
* otherwise.
|
|
*/
|
|
static void cp210x_change_speed(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old_termios)
|
|
{
|
|
u32 baud;
|
|
|
|
baud = tty->termios.c_ospeed;
|
|
|
|
/* This maps the requested rate to a rate valid on cp2102 or cp2103,
|
|
* or to an arbitrary rate in [1M,2M].
|
|
*
|
|
* NOTE: B0 is not implemented.
|
|
*/
|
|
baud = cp210x_quantise_baudrate(baud);
|
|
|
|
dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
|
|
if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
|
|
sizeof(baud))) {
|
|
dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
|
|
if (old_termios)
|
|
baud = old_termios->c_ospeed;
|
|
else
|
|
baud = 9600;
|
|
}
|
|
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
}
|
|
|
|
static void cp210x_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old_termios)
|
|
{
|
|
struct device *dev = &port->dev;
|
|
unsigned int cflag, old_cflag;
|
|
unsigned int bits;
|
|
unsigned int modem_ctl[4];
|
|
|
|
dev_dbg(dev, "%s - port %d\n", __func__, port->number);
|
|
|
|
if (!tty)
|
|
return;
|
|
|
|
cflag = tty->termios.c_cflag;
|
|
old_cflag = old_termios->c_cflag;
|
|
|
|
if (tty->termios.c_ospeed != old_termios->c_ospeed)
|
|
cp210x_change_speed(tty, port, old_termios);
|
|
|
|
/* 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;
|
|
dev_dbg(dev, "%s - data bits = 5\n", __func__);
|
|
break;
|
|
case CS6:
|
|
bits |= BITS_DATA_6;
|
|
dev_dbg(dev, "%s - data bits = 6\n", __func__);
|
|
break;
|
|
case CS7:
|
|
bits |= BITS_DATA_7;
|
|
dev_dbg(dev, "%s - data bits = 7\n", __func__);
|
|
break;
|
|
case CS8:
|
|
bits |= BITS_DATA_8;
|
|
dev_dbg(dev, "%s - data bits = 8\n", __func__);
|
|
break;
|
|
/*case CS9:
|
|
bits |= BITS_DATA_9;
|
|
dev_dbg(dev, "%s - data bits = 9\n", __func__);
|
|
break;*/
|
|
default:
|
|
dev_dbg(dev, "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))
|
|
dev_dbg(dev, "Number of data bits requested not supported by device\n");
|
|
}
|
|
|
|
if ((cflag & (PARENB|PARODD|CMSPAR)) !=
|
|
(old_cflag & (PARENB|PARODD|CMSPAR))) {
|
|
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
|
|
bits &= ~BITS_PARITY_MASK;
|
|
if (cflag & PARENB) {
|
|
if (cflag & CMSPAR) {
|
|
if (cflag & PARODD) {
|
|
bits |= BITS_PARITY_MARK;
|
|
dev_dbg(dev, "%s - parity = MARK\n", __func__);
|
|
} else {
|
|
bits |= BITS_PARITY_SPACE;
|
|
dev_dbg(dev, "%s - parity = SPACE\n", __func__);
|
|
}
|
|
} else {
|
|
if (cflag & PARODD) {
|
|
bits |= BITS_PARITY_ODD;
|
|
dev_dbg(dev, "%s - parity = ODD\n", __func__);
|
|
} else {
|
|
bits |= BITS_PARITY_EVEN;
|
|
dev_dbg(dev, "%s - parity = EVEN\n", __func__);
|
|
}
|
|
}
|
|
}
|
|
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
|
|
dev_dbg(dev, "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;
|
|
dev_dbg(dev, "%s - stop bits = 2\n", __func__);
|
|
} else {
|
|
bits |= BITS_STOP_1;
|
|
dev_dbg(dev, "%s - stop bits = 1\n", __func__);
|
|
}
|
|
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
|
|
dev_dbg(dev, "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);
|
|
dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
|
|
__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;
|
|
dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
|
|
} else {
|
|
modem_ctl[0] &= ~0x7B;
|
|
modem_ctl[0] |= 0x01;
|
|
modem_ctl[1] |= 0x40;
|
|
dev_dbg(dev, "%s - flow control = NONE\n", __func__);
|
|
}
|
|
|
|
dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
|
|
__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,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
return cp210x_tiocmset_port(port, set, clear);
|
|
}
|
|
|
|
static int cp210x_tiocmset_port(struct usb_serial_port *port,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
unsigned int control = 0;
|
|
|
|
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;
|
|
}
|
|
|
|
dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
|
|
|
|
return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
|
|
}
|
|
|
|
static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
|
|
{
|
|
if (on)
|
|
cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
|
|
else
|
|
cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
|
|
}
|
|
|
|
static int cp210x_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
unsigned int control;
|
|
int result;
|
|
|
|
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);
|
|
|
|
dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __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;
|
|
|
|
if (break_state == 0)
|
|
state = BREAK_OFF;
|
|
else
|
|
state = BREAK_ON;
|
|
dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
|
|
state == BREAK_OFF ? "off" : "on");
|
|
cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
|
|
}
|
|
|
|
static int cp210x_startup(struct usb_serial *serial)
|
|
{
|
|
struct usb_host_interface *cur_altsetting;
|
|
struct cp210x_serial_private *spriv;
|
|
|
|
/* cp210x buffers behave strangely unless device is reset */
|
|
usb_reset_device(serial->dev);
|
|
|
|
spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
|
|
if (!spriv)
|
|
return -ENOMEM;
|
|
|
|
cur_altsetting = serial->interface->cur_altsetting;
|
|
spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
|
|
|
|
usb_set_serial_data(serial, spriv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cp210x_release(struct usb_serial *serial)
|
|
{
|
|
struct cp210x_serial_private *spriv;
|
|
|
|
spriv = usb_get_serial_data(serial);
|
|
kfree(spriv);
|
|
}
|
|
|
|
module_usb_serial_driver(serial_drivers, id_table);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|