1902 lines
57 KiB
C
1902 lines
57 KiB
C
// 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 (craig@microtron.org.uk)
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*
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* Support to set flow control line levels using TIOCMGET and TIOCMSET
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* thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
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* control thanks to Munir Nassar nassarmu@real-time.com
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/usb.h>
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#include <linux/uaccess.h>
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#include <linux/usb/serial.h>
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#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_get_termios(struct tty_struct *, struct usb_serial_port *);
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static void cp210x_get_termios_port(struct usb_serial_port *port,
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tcflag_t *cflagp, unsigned int *baudp);
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static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
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struct ktermios *);
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static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
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struct ktermios*);
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static bool cp210x_tx_empty(struct usb_serial_port *port);
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static int cp210x_tiocmget(struct tty_struct *);
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static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
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static int cp210x_tiocmset_port(struct usb_serial_port *port,
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unsigned int, unsigned int);
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static void cp210x_break_ctl(struct tty_struct *, int);
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static int cp210x_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 int cp210x_port_remove(struct usb_serial_port *);
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static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
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{ USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
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{ USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
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{ USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
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{ USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
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{ USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
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{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
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{ USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
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{ USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
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{ USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */
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{ USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
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{ USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
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{ USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
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{ USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
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{ USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
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{ USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
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{ USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
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{ USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
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{ USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
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{ USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
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{ USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
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{ USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
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{ USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
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{ USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
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{ USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
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{ USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
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{ USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
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{ USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
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{ USB_DEVICE(0x10C4, 0x8056) }, /* Lorenz Messtechnik devices */
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{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
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{ USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
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{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
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{ USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
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{ USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
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{ USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
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{ USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
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{ USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
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{ USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
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{ USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
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{ USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
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{ USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
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{ USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
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{ USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
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{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
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{ USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
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{ USB_DEVICE(0x10C4, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */
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{ USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */
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{ USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */
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{ USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
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{ USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
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{ USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
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{ USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
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{ USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
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{ USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
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{ USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
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{ USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
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{ USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
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{ USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
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{ USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
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{ USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
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{ USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
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{ USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
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{ USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
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{ USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
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{ USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
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{ USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
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{ USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */
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{ USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
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{ USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
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{ USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
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{ USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
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{ USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
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{ USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */
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{ USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
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{ USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
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{ USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
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{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
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{ USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
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{ USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
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{ USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
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{ USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */
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{ USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */
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{ USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
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{ USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
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{ USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
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{ USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
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{ USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
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{ USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
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{ USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
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{ USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
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{ USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
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{ USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
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{ USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
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{ USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
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{ USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
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{ USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
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{ USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
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{ USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
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{ USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
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{ USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
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{ USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
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{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
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{ USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
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{ USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */
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{ USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
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{ USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
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{ USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */
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{ USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */
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{ USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
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{ USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
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{ USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
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{ USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
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{ USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
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{ USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
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{ USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */
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{ USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
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{ USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
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{ USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
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{ USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */
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{ USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
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{ USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
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{ USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
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{ USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
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{ USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
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{ USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
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{ USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
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{ USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
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{ USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
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{ USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
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{ USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
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{ USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
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{ USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
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{ USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
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{ USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
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{ USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
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{ USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
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{ USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
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{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
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{ USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
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{ USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */
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{ USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */
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{ USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
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{ USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
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{ USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
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{ USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
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{ USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
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{ USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
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{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
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{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
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{ USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
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{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
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{ USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
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{ USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
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{ USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
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{ USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
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{ USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
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{ USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
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{ USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
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{ USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
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{ USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
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{ USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
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{ USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
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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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struct cp210x_port_private {
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__u8 bInterfaceNumber;
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bool has_swapped_line_ctl;
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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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.tiocmget = cp210x_tiocmget,
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.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");
|