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1952 lines
57 KiB
1952 lines
57 KiB
// SPDX-License-Identifier: GPL-2.0 |
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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 ([email protected]) |
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* Copyright (C) 2010-2021 Johan Hovold ([email protected]) |
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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 [email protected]. RTSCTS hardware flow |
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* control thanks to Munir Nassar [email protected] |
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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/usb.h> |
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#include <linux/usb/serial.h> |
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#include <linux/gpio/driver.h> |
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#include <linux/bitops.h> |
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#include <linux/mutex.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_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_attach(struct usb_serial *); |
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static void cp210x_disconnect(struct usb_serial *); |
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static void cp210x_release(struct usb_serial *); |
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static int cp210x_port_probe(struct usb_serial_port *); |
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static void cp210x_port_remove(struct usb_serial_port *); |
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static void cp210x_dtr_rts(struct usb_serial_port *port, int on); |
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static void cp210x_process_read_urb(struct urb *urb); |
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static void cp210x_enable_event_mode(struct usb_serial_port *port); |
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static void cp210x_disable_event_mode(struct usb_serial_port *port); |
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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(0x0988, 0x0578) }, /* Teraoka AD2000 */ |
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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, 0x88D8) }, /* Acuity Brands nLight Air Adapter */ |
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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(0x1901, 0x0197) }, /* GE CS1000 Display serial interface */ |
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{ USB_DEVICE(0x1901, 0x0198) }, /* GE CS1000 M.2 Key E serial interface */ |
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{ USB_DEVICE(0x199B, 0xBA30) }, /* LORD WSDA-200-USB */ |
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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 */ |
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{ USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ |
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{ USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ |
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{ USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ |
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{ USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ |
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{ USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ |
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{ USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ |
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{ USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ |
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{ USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ |
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{ USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ |
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{ USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ |
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{ USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ |
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{ USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */ |
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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(0x3923, 0x7A0B) }, /* National Instruments USB Serial Console */ |
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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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#ifdef CONFIG_GPIOLIB |
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struct gpio_chip gc; |
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bool gpio_registered; |
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u8 gpio_pushpull; |
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u8 gpio_altfunc; |
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u8 gpio_input; |
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#endif |
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u8 partnum; |
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speed_t min_speed; |
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speed_t max_speed; |
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bool use_actual_rate; |
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}; |
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enum cp210x_event_state { |
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ES_DATA, |
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ES_ESCAPE, |
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ES_LSR, |
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ES_LSR_DATA_0, |
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ES_LSR_DATA_1, |
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ES_MSR |
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}; |
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struct cp210x_port_private { |
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u8 bInterfaceNumber; |
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bool event_mode; |
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enum cp210x_event_state event_state; |
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u8 lsr; |
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struct mutex mutex; |
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bool crtscts; |
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bool dtr; |
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bool rts; |
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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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.tx_empty = cp210x_tx_empty, |
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.throttle = usb_serial_generic_throttle, |
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.unthrottle = usb_serial_generic_unthrottle, |
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.tiocmget = cp210x_tiocmget, |
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.tiocmset = cp210x_tiocmset, |
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.get_icount = usb_serial_generic_get_icount, |
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.attach = cp210x_attach, |
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.disconnect = cp210x_disconnect, |
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.release = cp210x_release, |
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.port_probe = cp210x_port_probe, |
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.port_remove = cp210x_port_remove, |
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.dtr_rts = cp210x_dtr_rts, |
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.process_read_urb = cp210x_process_read_urb, |
|
}; |
|
|
|
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 |
|
#define CP210X_VENDOR_SPECIFIC 0xFF |
|
|
|
/* 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|SET)_CHARS */ |
|
struct cp210x_special_chars { |
|
u8 bEofChar; |
|
u8 bErrorChar; |
|
u8 bBreakChar; |
|
u8 bEventChar; |
|
u8 bXonChar; |
|
u8 bXoffChar; |
|
}; |
|
|
|
/* CP210X_VENDOR_SPECIFIC values */ |
|
#define CP210X_READ_2NCONFIG 0x000E |
|
#define CP210X_READ_LATCH 0x00C2 |
|
#define CP210X_GET_PARTNUM 0x370B |
|
#define CP210X_GET_PORTCONFIG 0x370C |
|
#define CP210X_GET_DEVICEMODE 0x3711 |
|
#define CP210X_WRITE_LATCH 0x37E1 |
|
|
|
/* Part number definitions */ |
|
#define CP210X_PARTNUM_CP2101 0x01 |
|
#define CP210X_PARTNUM_CP2102 0x02 |
|
#define CP210X_PARTNUM_CP2103 0x03 |
|
#define CP210X_PARTNUM_CP2104 0x04 |
|
#define CP210X_PARTNUM_CP2105 0x05 |
|
#define CP210X_PARTNUM_CP2108 0x08 |
|
#define CP210X_PARTNUM_CP2102N_QFN28 0x20 |
|
#define CP210X_PARTNUM_CP2102N_QFN24 0x21 |
|
#define CP210X_PARTNUM_CP2102N_QFN20 0x22 |
|
#define CP210X_PARTNUM_UNKNOWN 0xFF |
|
|
|
/* 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_EMBED_EVENTS */ |
|
#define CP210X_ESCCHAR 0xec |
|
|
|
#define CP210X_LSR_OVERRUN BIT(1) |
|
#define CP210X_LSR_PARITY BIT(2) |
|
#define CP210X_LSR_FRAME BIT(3) |
|
#define CP210X_LSR_BREAK BIT(4) |
|
|
|
|
|
/* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */ |
|
struct cp210x_flow_ctl { |
|
__le32 ulControlHandshake; |
|
__le32 ulFlowReplace; |
|
__le32 ulXonLimit; |
|
__le32 ulXoffLimit; |
|
}; |
|
|
|
/* cp210x_flow_ctl::ulControlHandshake */ |
|
#define CP210X_SERIAL_DTR_MASK GENMASK(1, 0) |
|
#define CP210X_SERIAL_DTR_INACTIVE (0 << 0) |
|
#define CP210X_SERIAL_DTR_ACTIVE (1 << 0) |
|
#define CP210X_SERIAL_DTR_FLOW_CTL (2 << 0) |
|
#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) |
|
|
|
/* 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_INACTIVE (0 << 6) |
|
#define CP210X_SERIAL_RTS_ACTIVE (1 << 6) |
|
#define CP210X_SERIAL_RTS_FLOW_CTL (2 << 6) |
|
#define CP210X_SERIAL_XOFF_CONTINUE BIT(31) |
|
|
|
/* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */ |
|
struct cp210x_pin_mode { |
|
u8 eci; |
|
u8 sci; |
|
}; |
|
|
|
#define CP210X_PIN_MODE_MODEM 0 |
|
#define CP210X_PIN_MODE_GPIO BIT(0) |
|
|
|
/* |
|
* CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes |
|
* on a CP2105 chip. Structure needs padding due to unused/unspecified bytes. |
|
*/ |
|
struct cp210x_dual_port_config { |
|
__le16 gpio_mode; |
|
u8 __pad0[2]; |
|
__le16 reset_state; |
|
u8 __pad1[4]; |
|
__le16 suspend_state; |
|
u8 sci_cfg; |
|
u8 eci_cfg; |
|
u8 device_cfg; |
|
} __packed; |
|
|
|
/* |
|
* CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xd bytes |
|
* on a CP2104 chip. Structure needs padding due to unused/unspecified bytes. |
|
*/ |
|
struct cp210x_single_port_config { |
|
__le16 gpio_mode; |
|
u8 __pad0[2]; |
|
__le16 reset_state; |
|
u8 __pad1[4]; |
|
__le16 suspend_state; |
|
u8 device_cfg; |
|
} __packed; |
|
|
|
/* GPIO modes */ |
|
#define CP210X_SCI_GPIO_MODE_OFFSET 9 |
|
#define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9) |
|
|
|
#define CP210X_ECI_GPIO_MODE_OFFSET 2 |
|
#define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2) |
|
|
|
#define CP210X_GPIO_MODE_OFFSET 8 |
|
#define CP210X_GPIO_MODE_MASK GENMASK(11, 8) |
|
|
|
/* CP2105 port configuration values */ |
|
#define CP2105_GPIO0_TXLED_MODE BIT(0) |
|
#define CP2105_GPIO1_RXLED_MODE BIT(1) |
|
#define CP2105_GPIO1_RS485_MODE BIT(2) |
|
|
|
/* CP2104 port configuration values */ |
|
#define CP2104_GPIO0_TXLED_MODE BIT(0) |
|
#define CP2104_GPIO1_RXLED_MODE BIT(1) |
|
#define CP2104_GPIO2_RS485_MODE BIT(2) |
|
|
|
/* CP2102N configuration array indices */ |
|
#define CP210X_2NCONFIG_CONFIG_VERSION_IDX 2 |
|
#define CP210X_2NCONFIG_GPIO_MODE_IDX 581 |
|
#define CP210X_2NCONFIG_GPIO_RSTLATCH_IDX 587 |
|
#define CP210X_2NCONFIG_GPIO_CONTROL_IDX 600 |
|
|
|
/* CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x2 bytes. */ |
|
struct cp210x_gpio_write { |
|
u8 mask; |
|
u8 state; |
|
}; |
|
|
|
/* |
|
* Helper to get interface number when we only have struct usb_serial. |
|
*/ |
|
static u8 cp210x_interface_num(struct usb_serial *serial) |
|
{ |
|
struct usb_host_interface *cur_altsetting; |
|
|
|
cur_altsetting = serial->interface->cur_altsetting; |
|
|
|
return cur_altsetting->desc.bInterfaceNumber; |
|
} |
|
|
|
/* |
|
* 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) |
|
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 = -EIO; |
|
} |
|
|
|
kfree(dmabuf); |
|
|
|
return result; |
|
} |
|
|
|
/* |
|
* 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)); |
|
} |
|
|
|
/* |
|
* Reads a variable-sized vendor block of CP210X_ registers, identified by val. |
|
* Returns data into buf in native USB byte order. |
|
*/ |
|
static int cp210x_read_vendor_block(struct usb_serial *serial, u8 type, u16 val, |
|
void *buf, int bufsize) |
|
{ |
|
void *dmabuf; |
|
int result; |
|
|
|
dmabuf = kmalloc(bufsize, GFP_KERNEL); |
|
if (!dmabuf) |
|
return -ENOMEM; |
|
|
|
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
|
CP210X_VENDOR_SPECIFIC, type, val, |
|
cp210x_interface_num(serial), dmabuf, bufsize, |
|
USB_CTRL_GET_TIMEOUT); |
|
if (result == bufsize) { |
|
memcpy(buf, dmabuf, bufsize); |
|
result = 0; |
|
} else { |
|
dev_err(&serial->interface->dev, |
|
"failed to get vendor val 0x%04x size %d: %d\n", val, |
|
bufsize, result); |
|
if (result >= 0) |
|
result = -EIO; |
|
} |
|
|
|
kfree(dmabuf); |
|
|
|
return result; |
|
} |
|
|
|
/* |
|
* 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 < 0) { |
|
dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n", |
|
req, bufsize, result); |
|
return result; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* 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)); |
|
} |
|
|
|
#ifdef CONFIG_GPIOLIB |
|
/* |
|
* Writes a variable-sized vendor block of CP210X_ registers, identified by val. |
|
* Data in buf must be in native USB byte order. |
|
*/ |
|
static int cp210x_write_vendor_block(struct usb_serial *serial, u8 type, |
|
u16 val, void *buf, int bufsize) |
|
{ |
|
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), |
|
CP210X_VENDOR_SPECIFIC, type, val, |
|
cp210x_interface_num(serial), dmabuf, bufsize, |
|
USB_CTRL_SET_TIMEOUT); |
|
|
|
kfree(dmabuf); |
|
|
|
if (result < 0) { |
|
dev_err(&serial->interface->dev, |
|
"failed to set vendor val 0x%04x size %d: %d\n", val, |
|
bufsize, result); |
|
return result; |
|
} |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(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; |
|
} |
|
|
|
if (tty) |
|
cp210x_set_termios(tty, port, NULL); |
|
|
|
result = usb_serial_generic_open(tty, port); |
|
if (result) |
|
goto err_disable; |
|
|
|
return 0; |
|
|
|
err_disable: |
|
cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE); |
|
port_priv->event_mode = false; |
|
|
|
return result; |
|
} |
|
|
|
static void cp210x_close(struct usb_serial_port *port) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(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); |
|
|
|
/* Disabling the interface disables event-insertion mode. */ |
|
port_priv->event_mode = false; |
|
} |
|
|
|
static void cp210x_process_lsr(struct usb_serial_port *port, unsigned char lsr, char *flag) |
|
{ |
|
if (lsr & CP210X_LSR_BREAK) { |
|
port->icount.brk++; |
|
*flag = TTY_BREAK; |
|
} else if (lsr & CP210X_LSR_PARITY) { |
|
port->icount.parity++; |
|
*flag = TTY_PARITY; |
|
} else if (lsr & CP210X_LSR_FRAME) { |
|
port->icount.frame++; |
|
*flag = TTY_FRAME; |
|
} |
|
|
|
if (lsr & CP210X_LSR_OVERRUN) { |
|
port->icount.overrun++; |
|
tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
|
} |
|
} |
|
|
|
static bool cp210x_process_char(struct usb_serial_port *port, unsigned char *ch, char *flag) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
|
|
|
switch (port_priv->event_state) { |
|
case ES_DATA: |
|
if (*ch == CP210X_ESCCHAR) { |
|
port_priv->event_state = ES_ESCAPE; |
|
break; |
|
} |
|
return false; |
|
case ES_ESCAPE: |
|
switch (*ch) { |
|
case 0: |
|
dev_dbg(&port->dev, "%s - escape char\n", __func__); |
|
*ch = CP210X_ESCCHAR; |
|
port_priv->event_state = ES_DATA; |
|
return false; |
|
case 1: |
|
port_priv->event_state = ES_LSR_DATA_0; |
|
break; |
|
case 2: |
|
port_priv->event_state = ES_LSR; |
|
break; |
|
case 3: |
|
port_priv->event_state = ES_MSR; |
|
break; |
|
default: |
|
dev_err(&port->dev, "malformed event 0x%02x\n", *ch); |
|
port_priv->event_state = ES_DATA; |
|
break; |
|
} |
|
break; |
|
case ES_LSR_DATA_0: |
|
port_priv->lsr = *ch; |
|
port_priv->event_state = ES_LSR_DATA_1; |
|
break; |
|
case ES_LSR_DATA_1: |
|
dev_dbg(&port->dev, "%s - lsr = 0x%02x, data = 0x%02x\n", |
|
__func__, port_priv->lsr, *ch); |
|
cp210x_process_lsr(port, port_priv->lsr, flag); |
|
port_priv->event_state = ES_DATA; |
|
return false; |
|
case ES_LSR: |
|
dev_dbg(&port->dev, "%s - lsr = 0x%02x\n", __func__, *ch); |
|
port_priv->lsr = *ch; |
|
cp210x_process_lsr(port, port_priv->lsr, flag); |
|
port_priv->event_state = ES_DATA; |
|
break; |
|
case ES_MSR: |
|
dev_dbg(&port->dev, "%s - msr = 0x%02x\n", __func__, *ch); |
|
/* unimplemented */ |
|
port_priv->event_state = ES_DATA; |
|
break; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static void cp210x_process_read_urb(struct urb *urb) |
|
{ |
|
struct usb_serial_port *port = urb->context; |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
|
unsigned char *ch = urb->transfer_buffer; |
|
char flag; |
|
int i; |
|
|
|
if (!urb->actual_length) |
|
return; |
|
|
|
if (port_priv->event_mode) { |
|
for (i = 0; i < urb->actual_length; i++, ch++) { |
|
flag = TTY_NORMAL; |
|
|
|
if (cp210x_process_char(port, ch, &flag)) |
|
continue; |
|
|
|
tty_insert_flip_char(&port->port, *ch, flag); |
|
} |
|
} else { |
|
tty_insert_flip_string(&port->port, ch, urb->actual_length); |
|
} |
|
tty_flip_buffer_push(&port->port); |
|
} |
|
|
|
/* |
|
* 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 = -EIO; |
|
} |
|
|
|
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; |
|
} |
|
|
|
struct cp210x_rate { |
|
speed_t rate; |
|
speed_t high; |
|
}; |
|
|
|
static const struct cp210x_rate cp210x_an205_table1[] = { |
|
{ 300, 300 }, |
|
{ 600, 600 }, |
|
{ 1200, 1200 }, |
|
{ 1800, 1800 }, |
|
{ 2400, 2400 }, |
|
{ 4000, 4000 }, |
|
{ 4800, 4803 }, |
|
{ 7200, 7207 }, |
|
{ 9600, 9612 }, |
|
{ 14400, 14428 }, |
|
{ 16000, 16062 }, |
|
{ 19200, 19250 }, |
|
{ 28800, 28912 }, |
|
{ 38400, 38601 }, |
|
{ 51200, 51558 }, |
|
{ 56000, 56280 }, |
|
{ 57600, 58053 }, |
|
{ 64000, 64111 }, |
|
{ 76800, 77608 }, |
|
{ 115200, 117028 }, |
|
{ 128000, 129347 }, |
|
{ 153600, 156868 }, |
|
{ 230400, 237832 }, |
|
{ 250000, 254234 }, |
|
{ 256000, 273066 }, |
|
{ 460800, 491520 }, |
|
{ 500000, 567138 }, |
|
{ 576000, 670254 }, |
|
{ 921600, UINT_MAX } |
|
}; |
|
|
|
/* |
|
* Quantises the baud rate as per AN205 Table 1 |
|
*/ |
|
static speed_t cp210x_get_an205_rate(speed_t baud) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(cp210x_an205_table1); ++i) { |
|
if (baud <= cp210x_an205_table1[i].high) |
|
break; |
|
} |
|
|
|
return cp210x_an205_table1[i].rate; |
|
} |
|
|
|
static speed_t cp210x_get_actual_rate(speed_t baud) |
|
{ |
|
unsigned int prescale = 1; |
|
unsigned int div; |
|
|
|
if (baud <= 365) |
|
prescale = 4; |
|
|
|
div = DIV_ROUND_CLOSEST(48000000, 2 * prescale * baud); |
|
baud = 48000000 / (2 * prescale * div); |
|
|
|
return baud; |
|
} |
|
|
|
/* |
|
* 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) |
|
{ |
|
struct usb_serial *serial = port->serial; |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
u32 baud; |
|
|
|
/* |
|
* This maps the requested rate to the actual rate, a valid rate on |
|
* cp2102 or cp2103, or to an arbitrary rate in [1M, max_speed]. |
|
* |
|
* NOTE: B0 is not implemented. |
|
*/ |
|
baud = clamp(tty->termios.c_ospeed, priv->min_speed, priv->max_speed); |
|
|
|
if (priv->use_actual_rate) |
|
baud = cp210x_get_actual_rate(baud); |
|
else if (baud < 1000000) |
|
baud = cp210x_get_an205_rate(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_enable_event_mode(struct usb_serial_port *port) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
|
int ret; |
|
|
|
if (port_priv->event_mode) |
|
return; |
|
|
|
port_priv->event_state = ES_DATA; |
|
port_priv->event_mode = true; |
|
|
|
ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, CP210X_ESCCHAR); |
|
if (ret) { |
|
dev_err(&port->dev, "failed to enable events: %d\n", ret); |
|
port_priv->event_mode = false; |
|
} |
|
} |
|
|
|
static void cp210x_disable_event_mode(struct usb_serial_port *port) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
|
int ret; |
|
|
|
if (!port_priv->event_mode) |
|
return; |
|
|
|
ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, 0); |
|
if (ret) { |
|
dev_err(&port->dev, "failed to disable events: %d\n", ret); |
|
return; |
|
} |
|
|
|
port_priv->event_mode = false; |
|
} |
|
|
|
static int cp210x_set_chars(struct usb_serial_port *port, |
|
struct cp210x_special_chars *chars) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
|
struct usb_serial *serial = port->serial; |
|
void *dmabuf; |
|
int result; |
|
|
|
dmabuf = kmemdup(chars, sizeof(*chars), GFP_KERNEL); |
|
if (!dmabuf) |
|
return -ENOMEM; |
|
|
|
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
|
CP210X_SET_CHARS, REQTYPE_HOST_TO_INTERFACE, 0, |
|
port_priv->bInterfaceNumber, |
|
dmabuf, sizeof(*chars), USB_CTRL_SET_TIMEOUT); |
|
|
|
kfree(dmabuf); |
|
|
|
if (result < 0) { |
|
dev_err(&port->dev, "failed to set special chars: %d\n", result); |
|
return result; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static bool cp210x_termios_change(const struct ktermios *a, const struct ktermios *b) |
|
{ |
|
bool iflag_change, cc_change; |
|
|
|
iflag_change = ((a->c_iflag ^ b->c_iflag) & (INPCK | IXON | IXOFF)); |
|
cc_change = a->c_cc[VSTART] != b->c_cc[VSTART] || |
|
a->c_cc[VSTOP] != b->c_cc[VSTOP]; |
|
|
|
return tty_termios_hw_change(a, b) || iflag_change || cc_change; |
|
} |
|
|
|
static void cp210x_set_flow_control(struct tty_struct *tty, |
|
struct usb_serial_port *port, struct ktermios *old_termios) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
|
struct cp210x_special_chars chars; |
|
struct cp210x_flow_ctl flow_ctl; |
|
u32 flow_repl; |
|
u32 ctl_hs; |
|
int ret; |
|
|
|
if (old_termios && |
|
C_CRTSCTS(tty) == (old_termios->c_cflag & CRTSCTS) && |
|
I_IXON(tty) == (old_termios->c_iflag & IXON) && |
|
I_IXOFF(tty) == (old_termios->c_iflag & IXOFF) && |
|
START_CHAR(tty) == old_termios->c_cc[VSTART] && |
|
STOP_CHAR(tty) == old_termios->c_cc[VSTOP]) { |
|
return; |
|
} |
|
|
|
if (I_IXON(tty) || I_IXOFF(tty)) { |
|
memset(&chars, 0, sizeof(chars)); |
|
|
|
chars.bXonChar = START_CHAR(tty); |
|
chars.bXoffChar = STOP_CHAR(tty); |
|
|
|
ret = cp210x_set_chars(port, &chars); |
|
if (ret) |
|
return; |
|
} |
|
|
|
mutex_lock(&port_priv->mutex); |
|
|
|
ret = cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl, |
|
sizeof(flow_ctl)); |
|
if (ret) |
|
goto out_unlock; |
|
|
|
ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); |
|
flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace); |
|
|
|
ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE; |
|
ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE; |
|
ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY; |
|
ctl_hs &= ~CP210X_SERIAL_DTR_MASK; |
|
if (port_priv->dtr) |
|
ctl_hs |= CP210X_SERIAL_DTR_ACTIVE; |
|
else |
|
ctl_hs |= CP210X_SERIAL_DTR_INACTIVE; |
|
|
|
flow_repl &= ~CP210X_SERIAL_RTS_MASK; |
|
if (C_CRTSCTS(tty)) { |
|
ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE; |
|
if (port_priv->rts) |
|
flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL; |
|
else |
|
flow_repl |= CP210X_SERIAL_RTS_INACTIVE; |
|
port_priv->crtscts = true; |
|
} else { |
|
ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE; |
|
if (port_priv->rts) |
|
flow_repl |= CP210X_SERIAL_RTS_ACTIVE; |
|
else |
|
flow_repl |= CP210X_SERIAL_RTS_INACTIVE; |
|
port_priv->crtscts = false; |
|
} |
|
|
|
if (I_IXOFF(tty)) |
|
flow_repl |= CP210X_SERIAL_AUTO_RECEIVE; |
|
else |
|
flow_repl &= ~CP210X_SERIAL_AUTO_RECEIVE; |
|
|
|
if (I_IXON(tty)) |
|
flow_repl |= CP210X_SERIAL_AUTO_TRANSMIT; |
|
else |
|
flow_repl &= ~CP210X_SERIAL_AUTO_TRANSMIT; |
|
|
|
flow_ctl.ulXonLimit = cpu_to_le32(128); |
|
flow_ctl.ulXoffLimit = cpu_to_le32(128); |
|
|
|
dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\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)); |
|
out_unlock: |
|
mutex_unlock(&port_priv->mutex); |
|
} |
|
|
|
static void cp210x_set_termios(struct tty_struct *tty, |
|
struct usb_serial_port *port, struct ktermios *old_termios) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(port->serial); |
|
u16 bits; |
|
int ret; |
|
|
|
if (old_termios && !cp210x_termios_change(&tty->termios, old_termios)) |
|
return; |
|
|
|
if (!old_termios || tty->termios.c_ospeed != old_termios->c_ospeed) |
|
cp210x_change_speed(tty, port, old_termios); |
|
|
|
/* CP2101 only supports CS8, 1 stop bit and non-stick parity. */ |
|
if (priv->partnum == CP210X_PARTNUM_CP2101) { |
|
tty->termios.c_cflag &= ~(CSIZE | CSTOPB | CMSPAR); |
|
tty->termios.c_cflag |= CS8; |
|
} |
|
|
|
bits = 0; |
|
|
|
switch (C_CSIZE(tty)) { |
|
case CS5: |
|
bits |= BITS_DATA_5; |
|
break; |
|
case CS6: |
|
bits |= BITS_DATA_6; |
|
break; |
|
case CS7: |
|
bits |= BITS_DATA_7; |
|
break; |
|
case CS8: |
|
default: |
|
bits |= BITS_DATA_8; |
|
break; |
|
} |
|
|
|
if (C_PARENB(tty)) { |
|
if (C_CMSPAR(tty)) { |
|
if (C_PARODD(tty)) |
|
bits |= BITS_PARITY_MARK; |
|
else |
|
bits |= BITS_PARITY_SPACE; |
|
} else { |
|
if (C_PARODD(tty)) |
|
bits |= BITS_PARITY_ODD; |
|
else |
|
bits |= BITS_PARITY_EVEN; |
|
} |
|
} |
|
|
|
if (C_CSTOPB(tty)) |
|
bits |= BITS_STOP_2; |
|
else |
|
bits |= BITS_STOP_1; |
|
|
|
ret = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits); |
|
if (ret) |
|
dev_err(&port->dev, "failed to set line control: %d\n", ret); |
|
|
|
cp210x_set_flow_control(tty, port, old_termios); |
|
|
|
/* |
|
* Enable event-insertion mode only if input parity checking is |
|
* enabled for now. |
|
*/ |
|
if (I_INPCK(tty)) |
|
cp210x_enable_event_mode(port); |
|
else |
|
cp210x_disable_event_mode(port); |
|
} |
|
|
|
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) |
|
{ |
|
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
|
struct cp210x_flow_ctl flow_ctl; |
|
u32 ctl_hs, flow_repl; |
|
u16 control = 0; |
|
int ret; |
|
|
|
mutex_lock(&port_priv->mutex); |
|
|
|
if (set & TIOCM_RTS) { |
|
port_priv->rts = true; |
|
control |= CONTROL_RTS; |
|
control |= CONTROL_WRITE_RTS; |
|
} |
|
if (set & TIOCM_DTR) { |
|
port_priv->dtr = true; |
|
control |= CONTROL_DTR; |
|
control |= CONTROL_WRITE_DTR; |
|
} |
|
if (clear & TIOCM_RTS) { |
|
port_priv->rts = false; |
|
control &= ~CONTROL_RTS; |
|
control |= CONTROL_WRITE_RTS; |
|
} |
|
if (clear & TIOCM_DTR) { |
|
port_priv->dtr = false; |
|
control &= ~CONTROL_DTR; |
|
control |= CONTROL_WRITE_DTR; |
|
} |
|
|
|
/* |
|
* Use SET_FLOW to set DTR and enable/disable auto-RTS when hardware |
|
* flow control is enabled. |
|
*/ |
|
if (port_priv->crtscts && control & CONTROL_WRITE_RTS) { |
|
ret = cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl, |
|
sizeof(flow_ctl)); |
|
if (ret) |
|
goto out_unlock; |
|
|
|
ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); |
|
flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace); |
|
|
|
ctl_hs &= ~CP210X_SERIAL_DTR_MASK; |
|
if (port_priv->dtr) |
|
ctl_hs |= CP210X_SERIAL_DTR_ACTIVE; |
|
else |
|
ctl_hs |= CP210X_SERIAL_DTR_INACTIVE; |
|
|
|
flow_repl &= ~CP210X_SERIAL_RTS_MASK; |
|
if (port_priv->rts) |
|
flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL; |
|
else |
|
flow_repl |= CP210X_SERIAL_RTS_INACTIVE; |
|
|
|
flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs); |
|
flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl); |
|
|
|
dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\n", |
|
__func__, ctl_hs, flow_repl); |
|
|
|
ret = cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl, |
|
sizeof(flow_ctl)); |
|
} else { |
|
dev_dbg(&port->dev, "%s - control = 0x%04x\n", __func__, control); |
|
|
|
ret = cp210x_write_u16_reg(port, CP210X_SET_MHS, control); |
|
} |
|
out_unlock: |
|
mutex_unlock(&port_priv->mutex); |
|
|
|
return ret; |
|
} |
|
|
|
static void cp210x_dtr_rts(struct usb_serial_port *port, int on) |
|
{ |
|
if (on) |
|
cp210x_tiocmset_port(port, TIOCM_DTR | TIOCM_RTS, 0); |
|
else |
|
cp210x_tiocmset_port(port, 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%02x\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); |
|
} |
|
|
|
#ifdef CONFIG_GPIOLIB |
|
static int cp210x_gpio_request(struct gpio_chip *gc, unsigned int offset) |
|
{ |
|
struct usb_serial *serial = gpiochip_get_data(gc); |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
|
|
if (priv->gpio_altfunc & BIT(offset)) |
|
return -ENODEV; |
|
|
|
return 0; |
|
} |
|
|
|
static int cp210x_gpio_get(struct gpio_chip *gc, unsigned int gpio) |
|
{ |
|
struct usb_serial *serial = gpiochip_get_data(gc); |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
u8 req_type = REQTYPE_DEVICE_TO_HOST; |
|
int result; |
|
u8 buf; |
|
|
|
if (priv->partnum == CP210X_PARTNUM_CP2105) |
|
req_type = REQTYPE_INTERFACE_TO_HOST; |
|
|
|
result = usb_autopm_get_interface(serial->interface); |
|
if (result) |
|
return result; |
|
|
|
result = cp210x_read_vendor_block(serial, req_type, |
|
CP210X_READ_LATCH, &buf, sizeof(buf)); |
|
usb_autopm_put_interface(serial->interface); |
|
if (result < 0) |
|
return result; |
|
|
|
return !!(buf & BIT(gpio)); |
|
} |
|
|
|
static void cp210x_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value) |
|
{ |
|
struct usb_serial *serial = gpiochip_get_data(gc); |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
struct cp210x_gpio_write buf; |
|
int result; |
|
|
|
if (value == 1) |
|
buf.state = BIT(gpio); |
|
else |
|
buf.state = 0; |
|
|
|
buf.mask = BIT(gpio); |
|
|
|
result = usb_autopm_get_interface(serial->interface); |
|
if (result) |
|
goto out; |
|
|
|
if (priv->partnum == CP210X_PARTNUM_CP2105) { |
|
result = cp210x_write_vendor_block(serial, |
|
REQTYPE_HOST_TO_INTERFACE, |
|
CP210X_WRITE_LATCH, &buf, |
|
sizeof(buf)); |
|
} else { |
|
u16 wIndex = buf.state << 8 | buf.mask; |
|
|
|
result = usb_control_msg(serial->dev, |
|
usb_sndctrlpipe(serial->dev, 0), |
|
CP210X_VENDOR_SPECIFIC, |
|
REQTYPE_HOST_TO_DEVICE, |
|
CP210X_WRITE_LATCH, |
|
wIndex, |
|
NULL, 0, USB_CTRL_SET_TIMEOUT); |
|
} |
|
|
|
usb_autopm_put_interface(serial->interface); |
|
out: |
|
if (result < 0) { |
|
dev_err(&serial->interface->dev, "failed to set GPIO value: %d\n", |
|
result); |
|
} |
|
} |
|
|
|
static int cp210x_gpio_direction_get(struct gpio_chip *gc, unsigned int gpio) |
|
{ |
|
struct usb_serial *serial = gpiochip_get_data(gc); |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
|
|
return priv->gpio_input & BIT(gpio); |
|
} |
|
|
|
static int cp210x_gpio_direction_input(struct gpio_chip *gc, unsigned int gpio) |
|
{ |
|
struct usb_serial *serial = gpiochip_get_data(gc); |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
|
|
if (priv->partnum == CP210X_PARTNUM_CP2105) { |
|
/* hardware does not support an input mode */ |
|
return -ENOTSUPP; |
|
} |
|
|
|
/* push-pull pins cannot be changed to be inputs */ |
|
if (priv->gpio_pushpull & BIT(gpio)) |
|
return -EINVAL; |
|
|
|
/* make sure to release pin if it is being driven low */ |
|
cp210x_gpio_set(gc, gpio, 1); |
|
|
|
priv->gpio_input |= BIT(gpio); |
|
|
|
return 0; |
|
} |
|
|
|
static int cp210x_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio, |
|
int value) |
|
{ |
|
struct usb_serial *serial = gpiochip_get_data(gc); |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
|
|
priv->gpio_input &= ~BIT(gpio); |
|
cp210x_gpio_set(gc, gpio, value); |
|
|
|
return 0; |
|
} |
|
|
|
static int cp210x_gpio_set_config(struct gpio_chip *gc, unsigned int gpio, |
|
unsigned long config) |
|
{ |
|
struct usb_serial *serial = gpiochip_get_data(gc); |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
enum pin_config_param param = pinconf_to_config_param(config); |
|
|
|
/* Succeed only if in correct mode (this can't be set at runtime) */ |
|
if ((param == PIN_CONFIG_DRIVE_PUSH_PULL) && |
|
(priv->gpio_pushpull & BIT(gpio))) |
|
return 0; |
|
|
|
if ((param == PIN_CONFIG_DRIVE_OPEN_DRAIN) && |
|
!(priv->gpio_pushpull & BIT(gpio))) |
|
return 0; |
|
|
|
return -ENOTSUPP; |
|
} |
|
|
|
/* |
|
* This function is for configuring GPIO using shared pins, where other signals |
|
* are made unavailable by configuring the use of GPIO. This is believed to be |
|
* only applicable to the cp2105 at this point, the other devices supported by |
|
* this driver that provide GPIO do so in a way that does not impact other |
|
* signals and are thus expected to have very different initialisation. |
|
*/ |
|
static int cp2105_gpioconf_init(struct usb_serial *serial) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
struct cp210x_pin_mode mode; |
|
struct cp210x_dual_port_config config; |
|
u8 intf_num = cp210x_interface_num(serial); |
|
u8 iface_config; |
|
int result; |
|
|
|
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
|
CP210X_GET_DEVICEMODE, &mode, |
|
sizeof(mode)); |
|
if (result < 0) |
|
return result; |
|
|
|
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
|
CP210X_GET_PORTCONFIG, &config, |
|
sizeof(config)); |
|
if (result < 0) |
|
return result; |
|
|
|
/* 2 banks of GPIO - One for the pins taken from each serial port */ |
|
if (intf_num == 0) { |
|
if (mode.eci == CP210X_PIN_MODE_MODEM) { |
|
/* mark all GPIOs of this interface as reserved */ |
|
priv->gpio_altfunc = 0xff; |
|
return 0; |
|
} |
|
|
|
iface_config = config.eci_cfg; |
|
priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) & |
|
CP210X_ECI_GPIO_MODE_MASK) >> |
|
CP210X_ECI_GPIO_MODE_OFFSET); |
|
priv->gc.ngpio = 2; |
|
} else if (intf_num == 1) { |
|
if (mode.sci == CP210X_PIN_MODE_MODEM) { |
|
/* mark all GPIOs of this interface as reserved */ |
|
priv->gpio_altfunc = 0xff; |
|
return 0; |
|
} |
|
|
|
iface_config = config.sci_cfg; |
|
priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) & |
|
CP210X_SCI_GPIO_MODE_MASK) >> |
|
CP210X_SCI_GPIO_MODE_OFFSET); |
|
priv->gc.ngpio = 3; |
|
} else { |
|
return -ENODEV; |
|
} |
|
|
|
/* mark all pins which are not in GPIO mode */ |
|
if (iface_config & CP2105_GPIO0_TXLED_MODE) /* GPIO 0 */ |
|
priv->gpio_altfunc |= BIT(0); |
|
if (iface_config & (CP2105_GPIO1_RXLED_MODE | /* GPIO 1 */ |
|
CP2105_GPIO1_RS485_MODE)) |
|
priv->gpio_altfunc |= BIT(1); |
|
|
|
/* driver implementation for CP2105 only supports outputs */ |
|
priv->gpio_input = 0; |
|
|
|
return 0; |
|
} |
|
|
|
static int cp2104_gpioconf_init(struct usb_serial *serial) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
struct cp210x_single_port_config config; |
|
u8 iface_config; |
|
u8 gpio_latch; |
|
int result; |
|
u8 i; |
|
|
|
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
|
CP210X_GET_PORTCONFIG, &config, |
|
sizeof(config)); |
|
if (result < 0) |
|
return result; |
|
|
|
priv->gc.ngpio = 4; |
|
|
|
iface_config = config.device_cfg; |
|
priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) & |
|
CP210X_GPIO_MODE_MASK) >> |
|
CP210X_GPIO_MODE_OFFSET); |
|
gpio_latch = (u8)((le16_to_cpu(config.reset_state) & |
|
CP210X_GPIO_MODE_MASK) >> |
|
CP210X_GPIO_MODE_OFFSET); |
|
|
|
/* mark all pins which are not in GPIO mode */ |
|
if (iface_config & CP2104_GPIO0_TXLED_MODE) /* GPIO 0 */ |
|
priv->gpio_altfunc |= BIT(0); |
|
if (iface_config & CP2104_GPIO1_RXLED_MODE) /* GPIO 1 */ |
|
priv->gpio_altfunc |= BIT(1); |
|
if (iface_config & CP2104_GPIO2_RS485_MODE) /* GPIO 2 */ |
|
priv->gpio_altfunc |= BIT(2); |
|
|
|
/* |
|
* Like CP2102N, CP2104 has also no strict input and output pin |
|
* modes. |
|
* Do the same input mode emulation as CP2102N. |
|
*/ |
|
for (i = 0; i < priv->gc.ngpio; ++i) { |
|
/* |
|
* Set direction to "input" iff pin is open-drain and reset |
|
* value is 1. |
|
*/ |
|
if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i))) |
|
priv->gpio_input |= BIT(i); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int cp2102n_gpioconf_init(struct usb_serial *serial) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
const u16 config_size = 0x02a6; |
|
u8 gpio_rst_latch; |
|
u8 config_version; |
|
u8 gpio_pushpull; |
|
u8 *config_buf; |
|
u8 gpio_latch; |
|
u8 gpio_ctrl; |
|
int result; |
|
u8 i; |
|
|
|
/* |
|
* Retrieve device configuration from the device. |
|
* The array received contains all customization settings done at the |
|
* factory/manufacturer. Format of the array is documented at the |
|
* time of writing at: |
|
* https://www.silabs.com/community/interface/knowledge-base.entry.html/2017/03/31/cp2102n_setconfig-xsfa |
|
*/ |
|
config_buf = kmalloc(config_size, GFP_KERNEL); |
|
if (!config_buf) |
|
return -ENOMEM; |
|
|
|
result = cp210x_read_vendor_block(serial, |
|
REQTYPE_DEVICE_TO_HOST, |
|
CP210X_READ_2NCONFIG, |
|
config_buf, |
|
config_size); |
|
if (result < 0) { |
|
kfree(config_buf); |
|
return result; |
|
} |
|
|
|
config_version = config_buf[CP210X_2NCONFIG_CONFIG_VERSION_IDX]; |
|
gpio_pushpull = config_buf[CP210X_2NCONFIG_GPIO_MODE_IDX]; |
|
gpio_ctrl = config_buf[CP210X_2NCONFIG_GPIO_CONTROL_IDX]; |
|
gpio_rst_latch = config_buf[CP210X_2NCONFIG_GPIO_RSTLATCH_IDX]; |
|
|
|
kfree(config_buf); |
|
|
|
/* Make sure this is a config format we understand. */ |
|
if (config_version != 0x01) |
|
return -ENOTSUPP; |
|
|
|
priv->gc.ngpio = 4; |
|
|
|
/* |
|
* Get default pin states after reset. Needed so we can determine |
|
* the direction of an open-drain pin. |
|
*/ |
|
gpio_latch = (gpio_rst_latch >> 3) & 0x0f; |
|
|
|
/* 0 indicates open-drain mode, 1 is push-pull */ |
|
priv->gpio_pushpull = (gpio_pushpull >> 3) & 0x0f; |
|
|
|
/* 0 indicates GPIO mode, 1 is alternate function */ |
|
priv->gpio_altfunc = (gpio_ctrl >> 2) & 0x0f; |
|
|
|
if (priv->partnum == CP210X_PARTNUM_CP2102N_QFN28) { |
|
/* |
|
* For the QFN28 package, GPIO4-6 are controlled by |
|
* the low three bits of the mode/latch fields. |
|
* Contrary to the document linked above, the bits for |
|
* the SUSPEND pins are elsewhere. No alternate |
|
* function is available for these pins. |
|
*/ |
|
priv->gc.ngpio = 7; |
|
gpio_latch |= (gpio_rst_latch & 7) << 4; |
|
priv->gpio_pushpull |= (gpio_pushpull & 7) << 4; |
|
} |
|
|
|
/* |
|
* The CP2102N does not strictly has input and output pin modes, |
|
* it only knows open-drain and push-pull modes which is set at |
|
* factory. An open-drain pin can function both as an |
|
* input or an output. We emulate input mode for open-drain pins |
|
* by making sure they are not driven low, and we do not allow |
|
* push-pull pins to be set as an input. |
|
*/ |
|
for (i = 0; i < priv->gc.ngpio; ++i) { |
|
/* |
|
* Set direction to "input" iff pin is open-drain and reset |
|
* value is 1. |
|
*/ |
|
if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i))) |
|
priv->gpio_input |= BIT(i); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int cp210x_gpio_init(struct usb_serial *serial) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
int result; |
|
|
|
switch (priv->partnum) { |
|
case CP210X_PARTNUM_CP2104: |
|
result = cp2104_gpioconf_init(serial); |
|
break; |
|
case CP210X_PARTNUM_CP2105: |
|
result = cp2105_gpioconf_init(serial); |
|
break; |
|
case CP210X_PARTNUM_CP2102N_QFN28: |
|
case CP210X_PARTNUM_CP2102N_QFN24: |
|
case CP210X_PARTNUM_CP2102N_QFN20: |
|
result = cp2102n_gpioconf_init(serial); |
|
break; |
|
default: |
|
return 0; |
|
} |
|
|
|
if (result < 0) |
|
return result; |
|
|
|
priv->gc.label = "cp210x"; |
|
priv->gc.request = cp210x_gpio_request; |
|
priv->gc.get_direction = cp210x_gpio_direction_get; |
|
priv->gc.direction_input = cp210x_gpio_direction_input; |
|
priv->gc.direction_output = cp210x_gpio_direction_output; |
|
priv->gc.get = cp210x_gpio_get; |
|
priv->gc.set = cp210x_gpio_set; |
|
priv->gc.set_config = cp210x_gpio_set_config; |
|
priv->gc.owner = THIS_MODULE; |
|
priv->gc.parent = &serial->interface->dev; |
|
priv->gc.base = -1; |
|
priv->gc.can_sleep = true; |
|
|
|
result = gpiochip_add_data(&priv->gc, serial); |
|
if (!result) |
|
priv->gpio_registered = true; |
|
|
|
return result; |
|
} |
|
|
|
static void cp210x_gpio_remove(struct usb_serial *serial) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
|
|
if (priv->gpio_registered) { |
|
gpiochip_remove(&priv->gc); |
|
priv->gpio_registered = false; |
|
} |
|
} |
|
|
|
#else |
|
|
|
static int cp210x_gpio_init(struct usb_serial *serial) |
|
{ |
|
return 0; |
|
} |
|
|
|
static void cp210x_gpio_remove(struct usb_serial *serial) |
|
{ |
|
/* Nothing to do */ |
|
} |
|
|
|
#endif |
|
|
|
static int cp210x_port_probe(struct usb_serial_port *port) |
|
{ |
|
struct usb_serial *serial = port->serial; |
|
struct cp210x_port_private *port_priv; |
|
|
|
port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); |
|
if (!port_priv) |
|
return -ENOMEM; |
|
|
|
port_priv->bInterfaceNumber = cp210x_interface_num(serial); |
|
mutex_init(&port_priv->mutex); |
|
|
|
usb_set_serial_port_data(port, port_priv); |
|
|
|
return 0; |
|
} |
|
|
|
static void 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); |
|
} |
|
|
|
static void cp210x_init_max_speed(struct usb_serial *serial) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
bool use_actual_rate = false; |
|
speed_t min = 300; |
|
speed_t max; |
|
|
|
switch (priv->partnum) { |
|
case CP210X_PARTNUM_CP2101: |
|
max = 921600; |
|
break; |
|
case CP210X_PARTNUM_CP2102: |
|
case CP210X_PARTNUM_CP2103: |
|
max = 1000000; |
|
break; |
|
case CP210X_PARTNUM_CP2104: |
|
use_actual_rate = true; |
|
max = 2000000; |
|
break; |
|
case CP210X_PARTNUM_CP2108: |
|
max = 2000000; |
|
break; |
|
case CP210X_PARTNUM_CP2105: |
|
if (cp210x_interface_num(serial) == 0) { |
|
use_actual_rate = true; |
|
max = 2000000; /* ECI */ |
|
} else { |
|
min = 2400; |
|
max = 921600; /* SCI */ |
|
} |
|
break; |
|
case CP210X_PARTNUM_CP2102N_QFN28: |
|
case CP210X_PARTNUM_CP2102N_QFN24: |
|
case CP210X_PARTNUM_CP2102N_QFN20: |
|
use_actual_rate = true; |
|
max = 3000000; |
|
break; |
|
default: |
|
max = 2000000; |
|
break; |
|
} |
|
|
|
priv->min_speed = min; |
|
priv->max_speed = max; |
|
priv->use_actual_rate = use_actual_rate; |
|
} |
|
|
|
static int cp210x_attach(struct usb_serial *serial) |
|
{ |
|
int result; |
|
struct cp210x_serial_private *priv; |
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
|
|
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
|
CP210X_GET_PARTNUM, &priv->partnum, |
|
sizeof(priv->partnum)); |
|
if (result < 0) { |
|
dev_warn(&serial->interface->dev, |
|
"querying part number failed\n"); |
|
priv->partnum = CP210X_PARTNUM_UNKNOWN; |
|
} |
|
|
|
usb_set_serial_data(serial, priv); |
|
|
|
cp210x_init_max_speed(serial); |
|
|
|
result = cp210x_gpio_init(serial); |
|
if (result < 0) { |
|
dev_err(&serial->interface->dev, "GPIO initialisation failed: %d\n", |
|
result); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void cp210x_disconnect(struct usb_serial *serial) |
|
{ |
|
cp210x_gpio_remove(serial); |
|
} |
|
|
|
static void cp210x_release(struct usb_serial *serial) |
|
{ |
|
struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
|
|
|
cp210x_gpio_remove(serial); |
|
|
|
kfree(priv); |
|
} |
|
|
|
module_usb_serial_driver(serial_drivers, id_table); |
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC); |
|
MODULE_LICENSE("GPL v2");
|
|
|