1196 lines
40 KiB
C
1196 lines
40 KiB
C
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/*
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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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tcflag_t *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 bool cp210x_tx_empty(struct usb_serial_port *port);
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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_port_probe(struct usb_serial_port *);
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static int cp210x_port_remove(struct usb_serial_port *);
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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(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
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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(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
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{ USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */
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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(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
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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, 0x8056) }, /* Lorenz Messtechnik devices */
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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(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
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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, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */
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{ USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */
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{ USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */
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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, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
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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, 0x8281) }, /* Nanotec Plug & Drive */
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{ USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
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{ USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
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{ USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */
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{ USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
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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, 0x83AA) }, /* Mark-10 Digital Force Gauge */
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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, 0x8470) }, /* Juniper Networks BX Series System Console */
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{ USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
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{ USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
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{ USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */
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{ USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */
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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, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
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{ USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
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{ USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
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{ USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
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{ USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
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{ USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
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{ USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
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{ USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
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{ USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
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{ USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
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{ USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
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{ USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
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{ USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
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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, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */
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{ USB_DEVICE(0x10C4, 0xEA70) }, /* 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, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */
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{ USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */
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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(0x12B8, 0xEC60) }, /* Link G4 ECU */
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{ USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
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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(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */
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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(0x16C0, 0x09B0) }, /* Lunatico Seletek */
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{ USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
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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(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
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{ USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */
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{ USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */
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{ USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
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{ USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
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{ USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
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{ USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
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{ USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
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{ USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
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{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
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{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
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{ USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
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{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
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{ USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
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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(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
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{ USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
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{ USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
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{ USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
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{ USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
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{ USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
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{ USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
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|
|
{ USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
|
||
|
|
{ USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
|
||
|
|
{ USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
|
||
|
|
{ USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
|
||
|
|
{ USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
|
||
|
|
{ USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
|
||
|
|
{ USB_DEVICE(0x3923, 0x7A0B) }, /* National Instruments USB Serial Console */
|
||
|
|
{ USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
|
||
|
|
{ } /* Terminating Entry */
|
||
|
|
};
|
||
|
|
|
||
|
|
MODULE_DEVICE_TABLE(usb, id_table);
|
||
|
|
|
||
|
|
struct cp210x_port_private {
|
||
|
|
__u8 bInterfaceNumber;
|
||
|
|
bool has_swapped_line_ctl;
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct usb_serial_driver cp210x_device = {
|
||
|
|
.driver = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.name = "cp210x",
|
||
|
|
},
|
||
|
|
.id_table = id_table,
|
||
|
|
.num_ports = 1,
|
||
|
|
.bulk_in_size = 256,
|
||
|
|
.bulk_out_size = 256,
|
||
|
|
.open = cp210x_open,
|
||
|
|
.close = cp210x_close,
|
||
|
|
.break_ctl = cp210x_break_ctl,
|
||
|
|
.set_termios = cp210x_set_termios,
|
||
|
|
.tx_empty = cp210x_tx_empty,
|
||
|
|
.throttle = usb_serial_generic_throttle,
|
||
|
|
.unthrottle = usb_serial_generic_unthrottle,
|
||
|
|
.tiocmget = cp210x_tiocmget,
|
||
|
|
.tiocmset = cp210x_tiocmset,
|
||
|
|
.port_probe = cp210x_port_probe,
|
||
|
|
.port_remove = cp210x_port_remove,
|
||
|
|
.dtr_rts = cp210x_dtr_rts
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct usb_serial_driver * const serial_drivers[] = {
|
||
|
|
&cp210x_device, NULL
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Config request types */
|
||
|
|
#define REQTYPE_HOST_TO_INTERFACE 0x41
|
||
|
|
#define REQTYPE_INTERFACE_TO_HOST 0xc1
|
||
|
|
#define REQTYPE_HOST_TO_DEVICE 0x40
|
||
|
|
#define REQTYPE_DEVICE_TO_HOST 0xc0
|
||
|
|
|
||
|
|
/* Config request codes */
|
||
|
|
#define CP210X_IFC_ENABLE 0x00
|
||
|
|
#define CP210X_SET_BAUDDIV 0x01
|
||
|
|
#define CP210X_GET_BAUDDIV 0x02
|
||
|
|
#define CP210X_SET_LINE_CTL 0x03
|
||
|
|
#define CP210X_GET_LINE_CTL 0x04
|
||
|
|
#define CP210X_SET_BREAK 0x05
|
||
|
|
#define CP210X_IMM_CHAR 0x06
|
||
|
|
#define CP210X_SET_MHS 0x07
|
||
|
|
#define CP210X_GET_MDMSTS 0x08
|
||
|
|
#define CP210X_SET_XON 0x09
|
||
|
|
#define CP210X_SET_XOFF 0x0A
|
||
|
|
#define CP210X_SET_EVENTMASK 0x0B
|
||
|
|
#define CP210X_GET_EVENTMASK 0x0C
|
||
|
|
#define CP210X_SET_CHAR 0x0D
|
||
|
|
#define CP210X_GET_CHARS 0x0E
|
||
|
|
#define CP210X_GET_PROPS 0x0F
|
||
|
|
#define CP210X_GET_COMM_STATUS 0x10
|
||
|
|
#define CP210X_RESET 0x11
|
||
|
|
#define CP210X_PURGE 0x12
|
||
|
|
#define CP210X_SET_FLOW 0x13
|
||
|
|
#define CP210X_GET_FLOW 0x14
|
||
|
|
#define CP210X_EMBED_EVENTS 0x15
|
||
|
|
#define CP210X_GET_EVENTSTATE 0x16
|
||
|
|
#define CP210X_SET_CHARS 0x19
|
||
|
|
#define CP210X_GET_BAUDRATE 0x1D
|
||
|
|
#define CP210X_SET_BAUDRATE 0x1E
|
||
|
|
|
||
|
|
/* CP210X_IFC_ENABLE */
|
||
|
|
#define UART_ENABLE 0x0001
|
||
|
|
#define UART_DISABLE 0x0000
|
||
|
|
|
||
|
|
/* CP210X_(SET|GET)_BAUDDIV */
|
||
|
|
#define BAUD_RATE_GEN_FREQ 0x384000
|
||
|
|
|
||
|
|
/* CP210X_(SET|GET)_LINE_CTL */
|
||
|
|
#define BITS_DATA_MASK 0X0f00
|
||
|
|
#define BITS_DATA_5 0X0500
|
||
|
|
#define BITS_DATA_6 0X0600
|
||
|
|
#define BITS_DATA_7 0X0700
|
||
|
|
#define BITS_DATA_8 0X0800
|
||
|
|
#define BITS_DATA_9 0X0900
|
||
|
|
|
||
|
|
#define BITS_PARITY_MASK 0x00f0
|
||
|
|
#define BITS_PARITY_NONE 0x0000
|
||
|
|
#define BITS_PARITY_ODD 0x0010
|
||
|
|
#define BITS_PARITY_EVEN 0x0020
|
||
|
|
#define BITS_PARITY_MARK 0x0030
|
||
|
|
#define BITS_PARITY_SPACE 0x0040
|
||
|
|
|
||
|
|
#define BITS_STOP_MASK 0x000f
|
||
|
|
#define BITS_STOP_1 0x0000
|
||
|
|
#define BITS_STOP_1_5 0x0001
|
||
|
|
#define BITS_STOP_2 0x0002
|
||
|
|
|
||
|
|
/* CP210X_SET_BREAK */
|
||
|
|
#define BREAK_ON 0x0001
|
||
|
|
#define BREAK_OFF 0x0000
|
||
|
|
|
||
|
|
/* CP210X_(SET_MHS|GET_MDMSTS) */
|
||
|
|
#define CONTROL_DTR 0x0001
|
||
|
|
#define CONTROL_RTS 0x0002
|
||
|
|
#define CONTROL_CTS 0x0010
|
||
|
|
#define CONTROL_DSR 0x0020
|
||
|
|
#define CONTROL_RING 0x0040
|
||
|
|
#define CONTROL_DCD 0x0080
|
||
|
|
#define CONTROL_WRITE_DTR 0x0100
|
||
|
|
#define CONTROL_WRITE_RTS 0x0200
|
||
|
|
|
||
|
|
/* CP210X_GET_COMM_STATUS returns these 0x13 bytes */
|
||
|
|
struct cp210x_comm_status {
|
||
|
|
__le32 ulErrors;
|
||
|
|
__le32 ulHoldReasons;
|
||
|
|
__le32 ulAmountInInQueue;
|
||
|
|
__le32 ulAmountInOutQueue;
|
||
|
|
u8 bEofReceived;
|
||
|
|
u8 bWaitForImmediate;
|
||
|
|
u8 bReserved;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* CP210X_PURGE - 16 bits passed in wValue of USB request.
|
||
|
|
* SiLabs app note AN571 gives a strange description of the 4 bits:
|
||
|
|
* bit 0 or bit 2 clears the transmit queue and 1 or 3 receive.
|
||
|
|
* writing 1 to all, however, purges cp2108 well enough to avoid the hang.
|
||
|
|
*/
|
||
|
|
#define PURGE_ALL 0x000f
|
||
|
|
|
||
|
|
/* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */
|
||
|
|
struct cp210x_flow_ctl {
|
||
|
|
__le32 ulControlHandshake;
|
||
|
|
__le32 ulFlowReplace;
|
||
|
|
__le32 ulXonLimit;
|
||
|
|
__le32 ulXoffLimit;
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
/* cp210x_flow_ctl::ulControlHandshake */
|
||
|
|
#define CP210X_SERIAL_DTR_MASK GENMASK(1, 0)
|
||
|
|
#define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode)
|
||
|
|
#define CP210X_SERIAL_CTS_HANDSHAKE BIT(3)
|
||
|
|
#define CP210X_SERIAL_DSR_HANDSHAKE BIT(4)
|
||
|
|
#define CP210X_SERIAL_DCD_HANDSHAKE BIT(5)
|
||
|
|
#define CP210X_SERIAL_DSR_SENSITIVITY BIT(6)
|
||
|
|
|
||
|
|
/* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */
|
||
|
|
#define CP210X_SERIAL_DTR_INACTIVE 0
|
||
|
|
#define CP210X_SERIAL_DTR_ACTIVE 1
|
||
|
|
#define CP210X_SERIAL_DTR_FLOW_CTL 2
|
||
|
|
|
||
|
|
/* cp210x_flow_ctl::ulFlowReplace */
|
||
|
|
#define CP210X_SERIAL_AUTO_TRANSMIT BIT(0)
|
||
|
|
#define CP210X_SERIAL_AUTO_RECEIVE BIT(1)
|
||
|
|
#define CP210X_SERIAL_ERROR_CHAR BIT(2)
|
||
|
|
#define CP210X_SERIAL_NULL_STRIPPING BIT(3)
|
||
|
|
#define CP210X_SERIAL_BREAK_CHAR BIT(4)
|
||
|
|
#define CP210X_SERIAL_RTS_MASK GENMASK(7, 6)
|
||
|
|
#define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6)
|
||
|
|
#define CP210X_SERIAL_XOFF_CONTINUE BIT(31)
|
||
|
|
|
||
|
|
/* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */
|
||
|
|
#define CP210X_SERIAL_RTS_INACTIVE 0
|
||
|
|
#define CP210X_SERIAL_RTS_ACTIVE 1
|
||
|
|
#define CP210X_SERIAL_RTS_FLOW_CTL 2
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Reads a variable-sized block of CP210X_ registers, identified by req.
|
||
|
|
* Returns data into buf in native USB byte order.
|
||
|
|
*/
|
||
|
|
static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req,
|
||
|
|
void *buf, int bufsize)
|
||
|
|
{
|
||
|
|
struct usb_serial *serial = port->serial;
|
||
|
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
|
||
|
|
void *dmabuf;
|
||
|
|
int result;
|
||
|
|
|
||
|
|
dmabuf = kmalloc(bufsize, GFP_KERNEL);
|
||
|
|
if (!dmabuf) {
|
||
|
|
/*
|
||
|
|
* FIXME Some callers don't bother to check for error,
|
||
|
|
* at least give them consistent junk until they are fixed
|
||
|
|
*/
|
||
|
|
memset(buf, 0, bufsize);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
|
||
|
|
req, REQTYPE_INTERFACE_TO_HOST, 0,
|
||
|
|
port_priv->bInterfaceNumber, dmabuf, bufsize,
|
||
|
|
USB_CTRL_SET_TIMEOUT);
|
||
|
|
if (result == bufsize) {
|
||
|
|
memcpy(buf, dmabuf, bufsize);
|
||
|
|
result = 0;
|
||
|
|
} else {
|
||
|
|
dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n",
|
||
|
|
req, bufsize, result);
|
||
|
|
if (result >= 0)
|
||
|
|
result = -EPROTO;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* FIXME Some callers don't bother to check for error,
|
||
|
|
* at least give them consistent junk until they are fixed
|
||
|
|
*/
|
||
|
|
memset(buf, 0, bufsize);
|
||
|
|
}
|
||
|
|
|
||
|
|
kfree(dmabuf);
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Reads any 32-bit CP210X_ register identified by req.
|
||
|
|
*/
|
||
|
|
static int cp210x_read_u32_reg(struct usb_serial_port *port, u8 req, u32 *val)
|
||
|
|
{
|
||
|
|
__le32 le32_val;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = cp210x_read_reg_block(port, req, &le32_val, sizeof(le32_val));
|
||
|
|
if (err) {
|
||
|
|
/*
|
||
|
|
* FIXME Some callers don't bother to check for error,
|
||
|
|
* at least give them consistent junk until they are fixed
|
||
|
|
*/
|
||
|
|
*val = 0;
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
*val = le32_to_cpu(le32_val);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Reads any 16-bit CP210X_ register identified by req.
|
||
|
|
*/
|
||
|
|
static int cp210x_read_u16_reg(struct usb_serial_port *port, u8 req, u16 *val)
|
||
|
|
{
|
||
|
|
__le16 le16_val;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = cp210x_read_reg_block(port, req, &le16_val, sizeof(le16_val));
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
*val = le16_to_cpu(le16_val);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Reads any 8-bit CP210X_ register identified by req.
|
||
|
|
*/
|
||
|
|
static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val)
|
||
|
|
{
|
||
|
|
return cp210x_read_reg_block(port, req, val, sizeof(*val));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Writes any 16-bit CP210X_ register (req) whose value is passed
|
||
|
|
* entirely in the wValue field of the USB request.
|
||
|
|
*/
|
||
|
|
static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val)
|
||
|
|
{
|
||
|
|
struct usb_serial *serial = port->serial;
|
||
|
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
|
||
|
|
int result;
|
||
|
|
|
||
|
|
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
||
|
|
req, REQTYPE_HOST_TO_INTERFACE, val,
|
||
|
|
port_priv->bInterfaceNumber, NULL, 0,
|
||
|
|
USB_CTRL_SET_TIMEOUT);
|
||
|
|
if (result < 0) {
|
||
|
|
dev_err(&port->dev, "failed set request 0x%x status: %d\n",
|
||
|
|
req, result);
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Writes a variable-sized block of CP210X_ registers, identified by req.
|
||
|
|
* Data in buf must be in native USB byte order.
|
||
|
|
*/
|
||
|
|
static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
|
||
|
|
void *buf, int bufsize)
|
||
|
|
{
|
||
|
|
struct usb_serial *serial = port->serial;
|
||
|
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
|
||
|
|
void *dmabuf;
|
||
|
|
int result;
|
||
|
|
|
||
|
|
dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
|
||
|
|
if (!dmabuf)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
||
|
|
req, REQTYPE_HOST_TO_INTERFACE, 0,
|
||
|
|
port_priv->bInterfaceNumber, dmabuf, bufsize,
|
||
|
|
USB_CTRL_SET_TIMEOUT);
|
||
|
|
|
||
|
|
kfree(dmabuf);
|
||
|
|
|
||
|
|
if (result == bufsize) {
|
||
|
|
result = 0;
|
||
|
|
} else {
|
||
|
|
dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n",
|
||
|
|
req, bufsize, result);
|
||
|
|
if (result >= 0)
|
||
|
|
result = -EPROTO;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Writes any 32-bit CP210X_ register identified by req.
|
||
|
|
*/
|
||
|
|
static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val)
|
||
|
|
{
|
||
|
|
__le32 le32_val;
|
||
|
|
|
||
|
|
le32_val = cpu_to_le32(val);
|
||
|
|
|
||
|
|
return cp210x_write_reg_block(port, req, &le32_val, sizeof(le32_val));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Detect CP2108 GET_LINE_CTL bug and activate workaround.
|
||
|
|
* Write a known good value 0x800, read it back.
|
||
|
|
* If it comes back swapped the bug is detected.
|
||
|
|
* Preserve the original register value.
|
||
|
|
*/
|
||
|
|
static int cp210x_detect_swapped_line_ctl(struct usb_serial_port *port)
|
||
|
|
{
|
||
|
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
|
||
|
|
u16 line_ctl_save;
|
||
|
|
u16 line_ctl_test;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_save);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
err = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, 0x800);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_test);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
if (line_ctl_test == 8) {
|
||
|
|
port_priv->has_swapped_line_ctl = true;
|
||
|
|
line_ctl_save = swab16(line_ctl_save);
|
||
|
|
}
|
||
|
|
|
||
|
|
return cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, line_ctl_save);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Must always be called instead of cp210x_read_u16_reg(CP210X_GET_LINE_CTL)
|
||
|
|
* to workaround cp2108 bug and get correct value.
|
||
|
|
*/
|
||
|
|
static int cp210x_get_line_ctl(struct usb_serial_port *port, u16 *ctl)
|
||
|
|
{
|
||
|
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, ctl);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
/* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */
|
||
|
|
if (port_priv->has_swapped_line_ctl)
|
||
|
|
*ctl = swab16(*ctl);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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_write_u16_reg(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);
|
||
|
|
|
||
|
|
/* Clear both queues; cp2108 needs this to avoid an occasional hang */
|
||
|
|
cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL);
|
||
|
|
|
||
|
|
cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Read how many bytes are waiting in the TX queue.
|
||
|
|
*/
|
||
|
|
static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port,
|
||
|
|
u32 *count)
|
||
|
|
{
|
||
|
|
struct usb_serial *serial = port->serial;
|
||
|
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
|
||
|
|
struct cp210x_comm_status *sts;
|
||
|
|
int result;
|
||
|
|
|
||
|
|
sts = kmalloc(sizeof(*sts), GFP_KERNEL);
|
||
|
|
if (!sts)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
|
||
|
|
CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST,
|
||
|
|
0, port_priv->bInterfaceNumber, sts, sizeof(*sts),
|
||
|
|
USB_CTRL_GET_TIMEOUT);
|
||
|
|
if (result == sizeof(*sts)) {
|
||
|
|
*count = le32_to_cpu(sts->ulAmountInOutQueue);
|
||
|
|
result = 0;
|
||
|
|
} else {
|
||
|
|
dev_err(&port->dev, "failed to get comm status: %d\n", result);
|
||
|
|
if (result >= 0)
|
||
|
|
result = -EPROTO;
|
||
|
|
}
|
||
|
|
|
||
|
|
kfree(sts);
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
static bool cp210x_tx_empty(struct usb_serial_port *port)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
u32 count;
|
||
|
|
|
||
|
|
err = cp210x_get_tx_queue_byte_count(port, &count);
|
||
|
|
if (err)
|
||
|
|
return true;
|
||
|
|
|
||
|
|
return !count;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 {
|
||
|
|
tcflag_t 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,
|
||
|
|
tcflag_t *cflagp, unsigned int *baudp)
|
||
|
|
{
|
||
|
|
struct device *dev = &port->dev;
|
||
|
|
tcflag_t cflag;
|
||
|
|
struct cp210x_flow_ctl flow_ctl;
|
||
|
|
u32 baud;
|
||
|
|
u16 bits;
|
||
|
|
u32 ctl_hs;
|
||
|
|
u32 flow_repl;
|
||
|
|
|
||
|
|
cp210x_read_u32_reg(port, CP210X_GET_BAUDRATE, &baud);
|
||
|
|
|
||
|
|
dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
|
||
|
|
*baudp = baud;
|
||
|
|
|
||
|
|
cflag = *cflagp;
|
||
|
|
|
||
|
|
cp210x_get_line_ctl(port, &bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
|
||
|
|
sizeof(flow_ctl));
|
||
|
|
ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
|
||
|
|
if (ctl_hs & CP210X_SERIAL_CTS_HANDSHAKE) {
|
||
|
|
dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
|
||
|
|
/*
|
||
|
|
* When the port is closed, the CP210x hardware disables
|
||
|
|
* auto-RTS and RTS is deasserted but it leaves auto-CTS when
|
||
|
|
* in hardware flow control mode. When re-opening the port, if
|
||
|
|
* auto-CTS is enabled on the cp210x, then auto-RTS must be
|
||
|
|
* re-enabled in the driver.
|
||
|
|
*/
|
||
|
|
flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace);
|
||
|
|
flow_repl &= ~CP210X_SERIAL_RTS_MASK;
|
||
|
|
flow_repl |= CP210X_SERIAL_RTS_SHIFT(CP210X_SERIAL_RTS_FLOW_CTL);
|
||
|
|
flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
|
||
|
|
cp210x_write_reg_block(port,
|
||
|
|
CP210X_SET_FLOW,
|
||
|
|
&flow_ctl,
|
||
|
|
sizeof(flow_ctl));
|
||
|
|
|
||
|
|
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_write_u32_reg(port, CP210X_SET_BAUDRATE, 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;
|
||
|
|
u16 bits;
|
||
|
|
|
||
|
|
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_line_ctl(port, &bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
|
||
|
|
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_line_ctl(port, &bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
|
||
|
|
dev_dbg(dev, "Parity mode not supported by device\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
|
||
|
|
cp210x_get_line_ctl(port, &bits);
|
||
|
|
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_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
|
||
|
|
dev_dbg(dev, "Number of stop bits requested not supported by device\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
|
||
|
|
struct cp210x_flow_ctl flow_ctl;
|
||
|
|
u32 ctl_hs;
|
||
|
|
u32 flow_repl;
|
||
|
|
|
||
|
|
cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
|
||
|
|
sizeof(flow_ctl));
|
||
|
|
ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
|
||
|
|
flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace);
|
||
|
|
dev_dbg(dev, "%s - read ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
|
||
|
|
__func__, ctl_hs, flow_repl);
|
||
|
|
|
||
|
|
ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE;
|
||
|
|
ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE;
|
||
|
|
ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY;
|
||
|
|
ctl_hs &= ~CP210X_SERIAL_DTR_MASK;
|
||
|
|
ctl_hs |= CP210X_SERIAL_DTR_SHIFT(CP210X_SERIAL_DTR_ACTIVE);
|
||
|
|
if (cflag & CRTSCTS) {
|
||
|
|
ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE;
|
||
|
|
|
||
|
|
flow_repl &= ~CP210X_SERIAL_RTS_MASK;
|
||
|
|
flow_repl |= CP210X_SERIAL_RTS_SHIFT(
|
||
|
|
CP210X_SERIAL_RTS_FLOW_CTL);
|
||
|
|
dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
|
||
|
|
} else {
|
||
|
|
ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
|
||
|
|
|
||
|
|
flow_repl &= ~CP210X_SERIAL_RTS_MASK;
|
||
|
|
flow_repl |= CP210X_SERIAL_RTS_SHIFT(
|
||
|
|
CP210X_SERIAL_RTS_ACTIVE);
|
||
|
|
dev_dbg(dev, "%s - flow control = NONE\n", __func__);
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_dbg(dev, "%s - write ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
|
||
|
|
__func__, ctl_hs, flow_repl);
|
||
|
|
flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs);
|
||
|
|
flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
|
||
|
|
cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
|
||
|
|
sizeof(flow_ctl));
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
u16 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_write_u16_reg(port, CP210X_SET_MHS, control);
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
u8 control;
|
||
|
|
int result;
|
||
|
|
|
||
|
|
result = cp210x_read_u8_reg(port, CP210X_GET_MDMSTS, &control);
|
||
|
|
if (result)
|
||
|
|
return result;
|
||
|
|
|
||
|
|
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;
|
||
|
|
u16 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_write_u16_reg(port, CP210X_SET_BREAK, state);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cp210x_port_probe(struct usb_serial_port *port)
|
||
|
|
{
|
||
|
|
struct usb_serial *serial = port->serial;
|
||
|
|
struct usb_host_interface *cur_altsetting;
|
||
|
|
struct cp210x_port_private *port_priv;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
|
||
|
|
if (!port_priv)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
cur_altsetting = serial->interface->cur_altsetting;
|
||
|
|
port_priv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
|
||
|
|
|
||
|
|
usb_set_serial_port_data(port, port_priv);
|
||
|
|
|
||
|
|
ret = cp210x_detect_swapped_line_ctl(port);
|
||
|
|
if (ret) {
|
||
|
|
kfree(port_priv);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cp210x_port_remove(struct usb_serial_port *port)
|
||
|
|
{
|
||
|
|
struct cp210x_port_private *port_priv;
|
||
|
|
|
||
|
|
port_priv = usb_get_serial_port_data(port);
|
||
|
|
kfree(port_priv);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
module_usb_serial_driver(serial_drivers, id_table);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
||
|
|
MODULE_LICENSE("GPL");
|