| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Craig Shelley | 2365 | 27.19% | 22 | 13.58% |
| Martyn Welch | 1626 | 18.70% | 2 | 1.23% |
| Konstantin Shkolnyy | 1039 | 11.95% | 9 | 5.56% |
| Karoly Pados | 794 | 9.13% | 4 | 2.47% |
| Johan Hovold | 751 | 8.64% | 20 | 12.35% |
| Icenowy Zheng | 292 | 3.36% | 1 | 0.62% |
| Greg Kroah-Hartman | 238 | 2.74% | 12 | 7.41% |
| Matwey V. Kornilov | 190 | 2.18% | 1 | 0.62% |
| Alan Cox | 152 | 1.75% | 9 | 5.56% |
| David VomLehn | 142 | 1.63% | 1 | 0.62% |
| Preston Fick | 119 | 1.37% | 5 | 3.09% |
| Roland Koebler | 59 | 0.68% | 1 | 0.62% |
| Måns Rullgård | 41 | 0.47% | 1 | 0.62% |
| Ken Lin | 39 | 0.45% | 2 | 1.23% |
| Harvey Harrison | 37 | 0.43% | 2 | 1.23% |
| Bjorn Schneider | 30 | 0.34% | 1 | 0.62% |
| Johanna Abrahamsson | 30 | 0.34% | 1 | 0.62% |
| Alessio Igor Bogani | 28 | 0.32% | 1 | 0.62% |
| Sebastian Frei | 24 | 0.28% | 1 | 0.62% |
| David Peterson | 21 | 0.24% | 1 | 0.62% |
| Michiel vd Garde | 20 | 0.23% | 1 | 0.62% |
| Bruno Thomsen | 20 | 0.23% | 1 | 0.62% |
| Mike Manning | 20 | 0.23% | 1 | 0.62% |
| Sami Rahman | 20 | 0.23% | 1 | 0.62% |
| Amit Kucheria | 20 | 0.23% | 1 | 0.62% |
| Jon K Hellan | 20 | 0.23% | 1 | 0.62% |
| Jasem Mutlaq | 20 | 0.23% | 1 | 0.62% |
| Mika Westerberg | 19 | 0.22% | 1 | 0.62% |
| Alan Stern | 16 | 0.18% | 1 | 0.62% |
| Luis Llorente Campo | 10 | 0.11% | 1 | 0.62% |
| M Kondrin | 10 | 0.11% | 1 | 0.62% |
| Pozsar Balazs | 10 | 0.11% | 1 | 0.62% |
| Olli Salonen | 10 | 0.11% | 1 | 0.62% |
| Andras Kovacs | 10 | 0.11% | 1 | 0.62% |
| Anders Larsen | 10 | 0.11% | 1 | 0.62% |
| Vittorio Alfieri | 10 | 0.11% | 1 | 0.62% |
| Nathaniel Ting | 10 | 0.11% | 1 | 0.62% |
| Stefan Triller | 10 | 0.11% | 1 | 0.62% |
| Bernhard Beck | 10 | 0.11% | 1 | 0.62% |
| Vitja Makarov | 10 | 0.11% | 1 | 0.62% |
| Jason Detring | 10 | 0.11% | 1 | 0.62% |
| Tomasz K | 10 | 0.11% | 1 | 0.62% |
| Luiz Angelo Daros de Luca | 10 | 0.11% | 1 | 0.62% |
| Renato Caldas | 10 | 0.11% | 1 | 0.62% |
| Edouard Lafargue | 10 | 0.11% | 1 | 0.62% |
| Kyle Jones | 10 | 0.11% | 1 | 0.62% |
| A E Lawrence | 10 | 0.11% | 1 | 0.62% |
| Diego Elio 'Flameeyes' Pettenò | 10 | 0.11% | 1 | 0.62% |
| Damir N Abdullin | 10 | 0.11% | 1 | 0.62% |
| Mark Edwards | 10 | 0.11% | 1 | 0.62% |
| Christian Holl | 10 | 0.11% | 1 | 0.62% |
| Oliver Freyermuth | 10 | 0.11% | 1 | 0.62% |
| Andreas Engel | 10 | 0.11% | 1 | 0.62% |
| Kyle Roeschley | 10 | 0.11% | 1 | 0.62% |
| Robert M. Kenney | 10 | 0.11% | 1 | 0.62% |
| Andreas Bomholtz | 10 | 0.11% | 1 | 0.62% |
| Alex Stephens | 10 | 0.11% | 1 | 0.62% |
| Mikko Tuumanen | 10 | 0.11% | 1 | 0.62% |
| Tristan Bruns | 10 | 0.11% | 1 | 0.62% |
| Josef Balatka | 10 | 0.11% | 1 | 0.62% |
| Peter Sanford | 10 | 0.11% | 1 | 0.62% |
| Jeremie Rapin | 10 | 0.11% | 1 | 0.62% |
| Steve Conklin | 10 | 0.11% | 1 | 0.62% |
| Jeff Long | 10 | 0.11% | 1 | 0.62% |
| Malte Schröder | 10 | 0.11% | 1 | 0.62% |
| Barry Grussling | 10 | 0.11% | 1 | 0.62% |
| Paul Jakma | 10 | 0.11% | 1 | 0.62% |
| Johannes Hölzl | 10 | 0.11% | 1 | 0.62% |
| Peter Dedecker | 10 | 0.11% | 1 | 0.62% |
| Ivan Mironov | 10 | 0.11% | 1 | 0.62% |
| Lennart Sorensen | 10 | 0.11% | 1 | 0.62% |
| DJ Delorie | 10 | 0.11% | 1 | 0.62% |
| Markus Becker | 10 | 0.11% | 1 | 0.62% |
| John D. Blair | 10 | 0.11% | 1 | 0.62% |
| Martin Kusserow | 10 | 0.11% | 1 | 0.62% |
| Joe Savage | 10 | 0.11% | 1 | 0.62% |
| Florian Fainelli | 9 | 0.10% | 2 | 1.23% |
| Wolfgang Glas | 9 | 0.10% | 1 | 0.62% |
| Éric Piel | 7 | 0.08% | 1 | 0.62% |
| Geert Uytterhoeven | 4 | 0.05% | 1 | 0.62% |
| Muhammad Falak R Wani | 3 | 0.03% | 1 | 0.62% |
| Yuri Matylitski | 1 | 0.01% | 1 | 0.62% |
| Márton Németh | 1 | 0.01% | 1 | 0.62% |
| Lucas De Marchi | 1 | 0.01% | 1 | 0.62% |
| Total | 8697 | 162 |
// SPDX-License-Identifier: GPL-2.0 /* * Silicon Laboratories CP210x USB to RS232 serial adaptor driver * * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) * * Support to set flow control line levels using TIOCMGET and TIOCMSET * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow * control thanks to Munir Nassar nassarmu@real-time.com * */ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/usb.h> #include <linux/uaccess.h> #include <linux/usb/serial.h> #include <linux/gpio/driver.h> #include <linux/bitops.h> #include <linux/mutex.h> #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" /* * Function Prototypes */ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); static void cp210x_close(struct usb_serial_port *); static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *); static void cp210x_get_termios_port(struct usb_serial_port *port, tcflag_t *cflagp, unsigned int *baudp); static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, struct ktermios *); static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, struct ktermios*); static bool cp210x_tx_empty(struct usb_serial_port *port); static int cp210x_tiocmget(struct tty_struct *); static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); static int cp210x_tiocmset_port(struct usb_serial_port *port, unsigned int, unsigned int); static void cp210x_break_ctl(struct tty_struct *, int); static int cp210x_attach(struct usb_serial *); static void cp210x_disconnect(struct usb_serial *); static void cp210x_release(struct usb_serial *); static int cp210x_port_probe(struct usb_serial_port *); static int cp210x_port_remove(struct usb_serial_port *); static void cp210x_dtr_rts(struct usb_serial_port *p, int on); static const struct usb_device_id id_table[] = { { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */ { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */ { USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */ { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */ { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ { USB_DEVICE(0x10C4, 0x8056) }, /* Lorenz Messtechnik devices */ { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */ { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */ { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */ { USB_DEVICE(0x10C4, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */ { USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */ { USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */ { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ { USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */ { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */ { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */ { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */ { USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */ { USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */ { USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */ { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */ { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ { USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */ { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */ { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */ { USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */ { USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */ { USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */ { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */ { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ { USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */ { USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */ { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */ { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ { USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */ { USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */ { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ { USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */ { USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */ { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ { USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */ { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ { USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */ { USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */ { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */ { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */ { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ { USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */ { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */ { USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */ { USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */ { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */ { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */ { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */ { USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */ { USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */ { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */ { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ { 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_serial_private { #ifdef CONFIG_GPIOLIB struct gpio_chip gc; bool gpio_registered; u8 gpio_pushpull; u8 gpio_altfunc; u8 gpio_input; #endif u8 partnum; speed_t min_speed; speed_t max_speed; bool use_actual_rate; }; 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, .tiocmget = cp210x_tiocmget, .tiocmset = cp210x_tiocmset, .attach = cp210x_attach, .disconnect = cp210x_disconnect, .release = cp210x_release, .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 #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_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_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 /* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */ struct cp210x_pin_mode { u8 eci; u8 sci; } __packed; #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; } __packed; /* * 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) { /* * 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 = -EIO; /* * 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)); } /* * 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 == 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 = -EIO; } 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)); } #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 == bufsize) { result = 0; } else { dev_err(&serial->interface->dev, "failed to set vendor val 0x%04x size %d: %d\n", val, bufsize, result); if (result >= 0) result = -EIO; } return result; } #endif /* * 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; } 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 = -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; } /* * 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; 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__); cflag |= CRTSCTS; } else { dev_dbg(dev, "%s - flow control = NONE\n", __func__); cflag &= ~CRTSCTS; } *cflagp = cflag; } 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_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: default: bits |= BITS_DATA_8; dev_dbg(dev, "%s - data bits = 8\n", __func__); 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); } #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; int ret; port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); if (!port_priv) return -ENOMEM; port_priv->bInterfaceNumber = cp210x_interface_num(serial); 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; } 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");
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