| /* |
| * Silicon Laboratories CP210x USB to RS232 serial adaptor driver |
| * |
| * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License version |
| * 2 as published by the Free Software Foundation. |
| * |
| * 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> |
| |
| #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, |
| unsigned int *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_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(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, 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, 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, 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, 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, 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, 0x8946) }, /* Ketra N1 Wireless Interface */ |
| { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ |
| { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ |
| { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ |
| { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ |
| { 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(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(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(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(0x413C, 0x9500) }, /* DW700 GPS USB interface */ |
| { } /* Terminating Entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, id_table); |
| |
| struct cp210x_port_private { |
| __u8 bInterfaceNumber; |
| bool has_swapped_line_ctl; |
| }; |
| |
| static struct usb_serial_driver cp210x_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "cp210x", |
| }, |
| .id_table = id_table, |
| .num_ports = 1, |
| .bulk_in_size = 256, |
| .bulk_out_size = 256, |
| .open = cp210x_open, |
| .close = cp210x_close, |
| .break_ctl = cp210x_break_ctl, |
| .set_termios = cp210x_set_termios, |
| .tx_empty = cp210x_tx_empty, |
| .tiocmget = cp210x_tiocmget, |
| .tiocmset = cp210x_tiocmset, |
| .port_probe = cp210x_port_probe, |
| .port_remove = cp210x_port_remove, |
| .dtr_rts = cp210x_dtr_rts |
| }; |
| |
| static struct usb_serial_driver * const serial_drivers[] = { |
| &cp210x_device, NULL |
| }; |
| |
| /* Config request types */ |
| #define REQTYPE_HOST_TO_INTERFACE 0x41 |
| #define REQTYPE_INTERFACE_TO_HOST 0xc1 |
| #define REQTYPE_HOST_TO_DEVICE 0x40 |
| #define REQTYPE_DEVICE_TO_HOST 0xc0 |
| |
| /* Config request codes */ |
| #define CP210X_IFC_ENABLE 0x00 |
| #define CP210X_SET_BAUDDIV 0x01 |
| #define CP210X_GET_BAUDDIV 0x02 |
| #define CP210X_SET_LINE_CTL 0x03 |
| #define CP210X_GET_LINE_CTL 0x04 |
| #define CP210X_SET_BREAK 0x05 |
| #define CP210X_IMM_CHAR 0x06 |
| #define CP210X_SET_MHS 0x07 |
| #define CP210X_GET_MDMSTS 0x08 |
| #define CP210X_SET_XON 0x09 |
| #define CP210X_SET_XOFF 0x0A |
| #define CP210X_SET_EVENTMASK 0x0B |
| #define CP210X_GET_EVENTMASK 0x0C |
| #define CP210X_SET_CHAR 0x0D |
| #define CP210X_GET_CHARS 0x0E |
| #define CP210X_GET_PROPS 0x0F |
| #define CP210X_GET_COMM_STATUS 0x10 |
| #define CP210X_RESET 0x11 |
| #define CP210X_PURGE 0x12 |
| #define CP210X_SET_FLOW 0x13 |
| #define CP210X_GET_FLOW 0x14 |
| #define CP210X_EMBED_EVENTS 0x15 |
| #define CP210X_GET_EVENTSTATE 0x16 |
| #define CP210X_SET_CHARS 0x19 |
| #define CP210X_GET_BAUDRATE 0x1D |
| #define CP210X_SET_BAUDRATE 0x1E |
| |
| /* CP210X_IFC_ENABLE */ |
| #define UART_ENABLE 0x0001 |
| #define UART_DISABLE 0x0000 |
| |
| /* CP210X_(SET|GET)_BAUDDIV */ |
| #define BAUD_RATE_GEN_FREQ 0x384000 |
| |
| /* CP210X_(SET|GET)_LINE_CTL */ |
| #define BITS_DATA_MASK 0X0f00 |
| #define BITS_DATA_5 0X0500 |
| #define BITS_DATA_6 0X0600 |
| #define BITS_DATA_7 0X0700 |
| #define BITS_DATA_8 0X0800 |
| #define BITS_DATA_9 0X0900 |
| |
| #define BITS_PARITY_MASK 0x00f0 |
| #define BITS_PARITY_NONE 0x0000 |
| #define BITS_PARITY_ODD 0x0010 |
| #define BITS_PARITY_EVEN 0x0020 |
| #define BITS_PARITY_MARK 0x0030 |
| #define BITS_PARITY_SPACE 0x0040 |
| |
| #define BITS_STOP_MASK 0x000f |
| #define BITS_STOP_1 0x0000 |
| #define BITS_STOP_1_5 0x0001 |
| #define BITS_STOP_2 0x0002 |
| |
| /* CP210X_SET_BREAK */ |
| #define BREAK_ON 0x0001 |
| #define BREAK_OFF 0x0000 |
| |
| /* CP210X_(SET_MHS|GET_MDMSTS) */ |
| #define CONTROL_DTR 0x0001 |
| #define CONTROL_RTS 0x0002 |
| #define CONTROL_CTS 0x0010 |
| #define CONTROL_DSR 0x0020 |
| #define CONTROL_RING 0x0040 |
| #define CONTROL_DCD 0x0080 |
| #define CONTROL_WRITE_DTR 0x0100 |
| #define CONTROL_WRITE_RTS 0x0200 |
| |
| /* CP210X_GET_COMM_STATUS returns these 0x13 bytes */ |
| struct cp210x_comm_status { |
| __le32 ulErrors; |
| __le32 ulHoldReasons; |
| __le32 ulAmountInInQueue; |
| __le32 ulAmountInOutQueue; |
| u8 bEofReceived; |
| u8 bWaitForImmediate; |
| u8 bReserved; |
| } __packed; |
| |
| /* |
| * CP210X_PURGE - 16 bits passed in wValue of USB request. |
| * SiLabs app note AN571 gives a strange description of the 4 bits: |
| * bit 0 or bit 2 clears the transmit queue and 1 or 3 receive. |
| * writing 1 to all, however, purges cp2108 well enough to avoid the hang. |
| */ |
| #define PURGE_ALL 0x000f |
| |
| /* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */ |
| struct cp210x_flow_ctl { |
| __le32 ulControlHandshake; |
| __le32 ulFlowReplace; |
| __le32 ulXonLimit; |
| __le32 ulXoffLimit; |
| } __packed; |
| |
| /* cp210x_flow_ctl::ulControlHandshake */ |
| #define CP210X_SERIAL_DTR_MASK GENMASK(1, 0) |
| #define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode) |
| #define CP210X_SERIAL_CTS_HANDSHAKE BIT(3) |
| #define CP210X_SERIAL_DSR_HANDSHAKE BIT(4) |
| #define CP210X_SERIAL_DCD_HANDSHAKE BIT(5) |
| #define CP210X_SERIAL_DSR_SENSITIVITY BIT(6) |
| |
| /* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */ |
| #define CP210X_SERIAL_DTR_INACTIVE 0 |
| #define CP210X_SERIAL_DTR_ACTIVE 1 |
| #define CP210X_SERIAL_DTR_FLOW_CTL 2 |
| |
| /* cp210x_flow_ctl::ulFlowReplace */ |
| #define CP210X_SERIAL_AUTO_TRANSMIT BIT(0) |
| #define CP210X_SERIAL_AUTO_RECEIVE BIT(1) |
| #define CP210X_SERIAL_ERROR_CHAR BIT(2) |
| #define CP210X_SERIAL_NULL_STRIPPING BIT(3) |
| #define CP210X_SERIAL_BREAK_CHAR BIT(4) |
| #define CP210X_SERIAL_RTS_MASK GENMASK(7, 6) |
| #define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6) |
| #define CP210X_SERIAL_XOFF_CONTINUE BIT(31) |
| |
| /* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */ |
| #define CP210X_SERIAL_RTS_INACTIVE 0 |
| #define CP210X_SERIAL_RTS_ACTIVE 1 |
| #define CP210X_SERIAL_RTS_FLOW_CTL 2 |
| |
| /* |
| * Reads a variable-sized block of CP210X_ registers, identified by req. |
| * Returns data into buf in native USB byte order. |
| */ |
| static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req, |
| void *buf, int bufsize) |
| { |
| struct usb_serial *serial = port->serial; |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| void *dmabuf; |
| int result; |
| |
| dmabuf = kmalloc(bufsize, GFP_KERNEL); |
| if (!dmabuf) { |
| /* |
| * FIXME Some callers don't bother to check for error, |
| * at least give them consistent junk until they are fixed |
| */ |
| memset(buf, 0, bufsize); |
| return -ENOMEM; |
| } |
| |
| result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| req, REQTYPE_INTERFACE_TO_HOST, 0, |
| port_priv->bInterfaceNumber, dmabuf, bufsize, |
| USB_CTRL_SET_TIMEOUT); |
| if (result == bufsize) { |
| memcpy(buf, dmabuf, bufsize); |
| result = 0; |
| } else { |
| dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n", |
| req, bufsize, result); |
| if (result >= 0) |
| result = -EPROTO; |
| |
| /* |
| * FIXME Some callers don't bother to check for error, |
| * at least give them consistent junk until they are fixed |
| */ |
| memset(buf, 0, bufsize); |
| } |
| |
| kfree(dmabuf); |
| |
| return result; |
| } |
| |
| /* |
| * Reads any 32-bit CP210X_ register identified by req. |
| */ |
| static int cp210x_read_u32_reg(struct usb_serial_port *port, u8 req, u32 *val) |
| { |
| __le32 le32_val; |
| int err; |
| |
| err = cp210x_read_reg_block(port, req, &le32_val, sizeof(le32_val)); |
| if (err) { |
| /* |
| * FIXME Some callers don't bother to check for error, |
| * at least give them consistent junk until they are fixed |
| */ |
| *val = 0; |
| return err; |
| } |
| |
| *val = le32_to_cpu(le32_val); |
| |
| return 0; |
| } |
| |
| /* |
| * Reads any 16-bit CP210X_ register identified by req. |
| */ |
| static int cp210x_read_u16_reg(struct usb_serial_port *port, u8 req, u16 *val) |
| { |
| __le16 le16_val; |
| int err; |
| |
| err = cp210x_read_reg_block(port, req, &le16_val, sizeof(le16_val)); |
| if (err) |
| return err; |
| |
| *val = le16_to_cpu(le16_val); |
| |
| return 0; |
| } |
| |
| /* |
| * Reads any 8-bit CP210X_ register identified by req. |
| */ |
| static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val) |
| { |
| return cp210x_read_reg_block(port, req, val, sizeof(*val)); |
| } |
| |
| /* |
| * Writes any 16-bit CP210X_ register (req) whose value is passed |
| * entirely in the wValue field of the USB request. |
| */ |
| static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val) |
| { |
| struct usb_serial *serial = port->serial; |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| int result; |
| |
| result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| req, REQTYPE_HOST_TO_INTERFACE, val, |
| port_priv->bInterfaceNumber, NULL, 0, |
| USB_CTRL_SET_TIMEOUT); |
| if (result < 0) { |
| dev_err(&port->dev, "failed set request 0x%x status: %d\n", |
| req, result); |
| } |
| |
| return result; |
| } |
| |
| /* |
| * Writes a variable-sized block of CP210X_ registers, identified by req. |
| * Data in buf must be in native USB byte order. |
| */ |
| static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req, |
| void *buf, int bufsize) |
| { |
| struct usb_serial *serial = port->serial; |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| void *dmabuf; |
| int result; |
| |
| dmabuf = kmemdup(buf, bufsize, GFP_KERNEL); |
| if (!dmabuf) |
| return -ENOMEM; |
| |
| result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| req, REQTYPE_HOST_TO_INTERFACE, 0, |
| port_priv->bInterfaceNumber, dmabuf, bufsize, |
| USB_CTRL_SET_TIMEOUT); |
| |
| kfree(dmabuf); |
| |
| if (result == bufsize) { |
| result = 0; |
| } else { |
| dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n", |
| req, bufsize, result); |
| if (result >= 0) |
| result = -EPROTO; |
| } |
| |
| return result; |
| } |
| |
| /* |
| * Writes any 32-bit CP210X_ register identified by req. |
| */ |
| static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val) |
| { |
| __le32 le32_val; |
| |
| le32_val = cpu_to_le32(val); |
| |
| return cp210x_write_reg_block(port, req, &le32_val, sizeof(le32_val)); |
| } |
| |
| /* |
| * Detect CP2108 GET_LINE_CTL bug and activate workaround. |
| * Write a known good value 0x800, read it back. |
| * If it comes back swapped the bug is detected. |
| * Preserve the original register value. |
| */ |
| static int cp210x_detect_swapped_line_ctl(struct usb_serial_port *port) |
| { |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| u16 line_ctl_save; |
| u16 line_ctl_test; |
| int err; |
| |
| err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_save); |
| if (err) |
| return err; |
| |
| err = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, 0x800); |
| if (err) |
| return err; |
| |
| err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_test); |
| if (err) |
| return err; |
| |
| if (line_ctl_test == 8) { |
| port_priv->has_swapped_line_ctl = true; |
| line_ctl_save = swab16(line_ctl_save); |
| } |
| |
| return cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, line_ctl_save); |
| } |
| |
| /* |
| * Must always be called instead of cp210x_read_u16_reg(CP210X_GET_LINE_CTL) |
| * to workaround cp2108 bug and get correct value. |
| */ |
| static int cp210x_get_line_ctl(struct usb_serial_port *port, u16 *ctl) |
| { |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| int err; |
| |
| err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, ctl); |
| if (err) |
| return err; |
| |
| /* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */ |
| if (port_priv->has_swapped_line_ctl) |
| *ctl = swab16(*ctl); |
| |
| return 0; |
| } |
| |
| /* |
| * cp210x_quantise_baudrate |
| * Quantises the baud rate as per AN205 Table 1 |
| */ |
| static unsigned int cp210x_quantise_baudrate(unsigned int baud) |
| { |
| if (baud <= 300) |
| baud = 300; |
| else if (baud <= 600) baud = 600; |
| else if (baud <= 1200) baud = 1200; |
| else if (baud <= 1800) baud = 1800; |
| else if (baud <= 2400) baud = 2400; |
| else if (baud <= 4000) baud = 4000; |
| else if (baud <= 4803) baud = 4800; |
| else if (baud <= 7207) baud = 7200; |
| else if (baud <= 9612) baud = 9600; |
| else if (baud <= 14428) baud = 14400; |
| else if (baud <= 16062) baud = 16000; |
| else if (baud <= 19250) baud = 19200; |
| else if (baud <= 28912) baud = 28800; |
| else if (baud <= 38601) baud = 38400; |
| else if (baud <= 51558) baud = 51200; |
| else if (baud <= 56280) baud = 56000; |
| else if (baud <= 58053) baud = 57600; |
| else if (baud <= 64111) baud = 64000; |
| else if (baud <= 77608) baud = 76800; |
| else if (baud <= 117028) baud = 115200; |
| else if (baud <= 129347) baud = 128000; |
| else if (baud <= 156868) baud = 153600; |
| else if (baud <= 237832) baud = 230400; |
| else if (baud <= 254234) baud = 250000; |
| else if (baud <= 273066) baud = 256000; |
| else if (baud <= 491520) baud = 460800; |
| else if (baud <= 567138) baud = 500000; |
| else if (baud <= 670254) baud = 576000; |
| else if (baud < 1000000) |
| baud = 921600; |
| else if (baud > 2000000) |
| baud = 2000000; |
| return baud; |
| } |
| |
| static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| int result; |
| |
| result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE); |
| if (result) { |
| dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); |
| return result; |
| } |
| |
| /* Configure the termios structure */ |
| cp210x_get_termios(tty, port); |
| |
| /* The baud rate must be initialised on cp2104 */ |
| if (tty) |
| cp210x_change_speed(tty, port, NULL); |
| |
| return usb_serial_generic_open(tty, port); |
| } |
| |
| static void cp210x_close(struct usb_serial_port *port) |
| { |
| usb_serial_generic_close(port); |
| |
| /* Clear both queues; cp2108 needs this to avoid an occasional hang */ |
| cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL); |
| |
| cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE); |
| } |
| |
| /* |
| * Read how many bytes are waiting in the TX queue. |
| */ |
| static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port, |
| u32 *count) |
| { |
| struct usb_serial *serial = port->serial; |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| struct cp210x_comm_status *sts; |
| int result; |
| |
| sts = kmalloc(sizeof(*sts), GFP_KERNEL); |
| if (!sts) |
| return -ENOMEM; |
| |
| result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST, |
| 0, port_priv->bInterfaceNumber, sts, sizeof(*sts), |
| USB_CTRL_GET_TIMEOUT); |
| if (result == sizeof(*sts)) { |
| *count = le32_to_cpu(sts->ulAmountInOutQueue); |
| result = 0; |
| } else { |
| dev_err(&port->dev, "failed to get comm status: %d\n", result); |
| if (result >= 0) |
| result = -EPROTO; |
| } |
| |
| kfree(sts); |
| |
| return result; |
| } |
| |
| static bool cp210x_tx_empty(struct usb_serial_port *port) |
| { |
| int err; |
| u32 count; |
| |
| err = cp210x_get_tx_queue_byte_count(port, &count); |
| if (err) |
| return true; |
| |
| return !count; |
| } |
| |
| /* |
| * cp210x_get_termios |
| * Reads the baud rate, data bits, parity, stop bits and flow control mode |
| * from the device, corrects any unsupported values, and configures the |
| * termios structure to reflect the state of the device |
| */ |
| static void cp210x_get_termios(struct tty_struct *tty, |
| struct usb_serial_port *port) |
| { |
| unsigned int baud; |
| |
| if (tty) { |
| cp210x_get_termios_port(tty->driver_data, |
| &tty->termios.c_cflag, &baud); |
| tty_encode_baud_rate(tty, baud, baud); |
| } else { |
| unsigned int cflag; |
| cflag = 0; |
| cp210x_get_termios_port(port, &cflag, &baud); |
| } |
| } |
| |
| /* |
| * cp210x_get_termios_port |
| * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. |
| */ |
| static void cp210x_get_termios_port(struct usb_serial_port *port, |
| unsigned int *cflagp, unsigned int *baudp) |
| { |
| struct device *dev = &port->dev; |
| unsigned int cflag; |
| 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; |
| } |
| |
| /* |
| * CP2101 supports the following baud rates: |
| * |
| * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, |
| * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 |
| * |
| * CP2102 and CP2103 support the following additional rates: |
| * |
| * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, |
| * 576000 |
| * |
| * The device will map a requested rate to a supported one, but the result |
| * of requests for rates greater than 1053257 is undefined (see AN205). |
| * |
| * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, |
| * respectively, with an error less than 1%. The actual rates are determined |
| * by |
| * |
| * div = round(freq / (2 x prescale x request)) |
| * actual = freq / (2 x prescale x div) |
| * |
| * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps |
| * or 1 otherwise. |
| * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 |
| * otherwise. |
| */ |
| static void cp210x_change_speed(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| u32 baud; |
| |
| baud = tty->termios.c_ospeed; |
| |
| /* This maps the requested rate to a rate valid on cp2102 or cp2103, |
| * or to an arbitrary rate in [1M,2M]. |
| * |
| * NOTE: B0 is not implemented. |
| */ |
| baud = cp210x_quantise_baudrate(baud); |
| |
| dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); |
| if (cp210x_write_u32_reg(port, CP210X_SET_BAUDRATE, baud)) { |
| dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); |
| if (old_termios) |
| baud = old_termios->c_ospeed; |
| else |
| baud = 9600; |
| } |
| |
| tty_encode_baud_rate(tty, baud, baud); |
| } |
| |
| static void cp210x_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| struct device *dev = &port->dev; |
| unsigned int cflag, old_cflag; |
| u16 bits; |
| |
| cflag = tty->termios.c_cflag; |
| old_cflag = old_termios->c_cflag; |
| |
| if (tty->termios.c_ospeed != old_termios->c_ospeed) |
| cp210x_change_speed(tty, port, old_termios); |
| |
| /* If the number of data bits is to be updated */ |
| if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
| cp210x_get_line_ctl(port, &bits); |
| bits &= ~BITS_DATA_MASK; |
| switch (cflag & CSIZE) { |
| case CS5: |
| bits |= BITS_DATA_5; |
| dev_dbg(dev, "%s - data bits = 5\n", __func__); |
| break; |
| case CS6: |
| bits |= BITS_DATA_6; |
| dev_dbg(dev, "%s - data bits = 6\n", __func__); |
| break; |
| case CS7: |
| bits |= BITS_DATA_7; |
| dev_dbg(dev, "%s - data bits = 7\n", __func__); |
| break; |
| case CS8: |
| bits |= BITS_DATA_8; |
| dev_dbg(dev, "%s - data bits = 8\n", __func__); |
| break; |
| /*case CS9: |
| bits |= BITS_DATA_9; |
| dev_dbg(dev, "%s - data bits = 9\n", __func__); |
| break;*/ |
| default: |
| dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n"); |
| bits |= BITS_DATA_8; |
| break; |
| } |
| if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits)) |
| dev_dbg(dev, "Number of data bits requested not supported by device\n"); |
| } |
| |
| if ((cflag & (PARENB|PARODD|CMSPAR)) != |
| (old_cflag & (PARENB|PARODD|CMSPAR))) { |
| cp210x_get_line_ctl(port, &bits); |
| bits &= ~BITS_PARITY_MASK; |
| if (cflag & PARENB) { |
| if (cflag & CMSPAR) { |
| if (cflag & PARODD) { |
| bits |= BITS_PARITY_MARK; |
| dev_dbg(dev, "%s - parity = MARK\n", __func__); |
| } else { |
| bits |= BITS_PARITY_SPACE; |
| dev_dbg(dev, "%s - parity = SPACE\n", __func__); |
| } |
| } else { |
| if (cflag & PARODD) { |
| bits |= BITS_PARITY_ODD; |
| dev_dbg(dev, "%s - parity = ODD\n", __func__); |
| } else { |
| bits |= BITS_PARITY_EVEN; |
| dev_dbg(dev, "%s - parity = EVEN\n", __func__); |
| } |
| } |
| } |
| if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits)) |
| dev_dbg(dev, "Parity mode not supported by device\n"); |
| } |
| |
| if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { |
| cp210x_get_line_ctl(port, &bits); |
| bits &= ~BITS_STOP_MASK; |
| if (cflag & CSTOPB) { |
| bits |= BITS_STOP_2; |
| dev_dbg(dev, "%s - stop bits = 2\n", __func__); |
| } else { |
| bits |= BITS_STOP_1; |
| dev_dbg(dev, "%s - stop bits = 1\n", __func__); |
| } |
| if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits)) |
| dev_dbg(dev, "Number of stop bits requested not supported by device\n"); |
| } |
| |
| if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { |
| struct cp210x_flow_ctl flow_ctl; |
| u32 ctl_hs; |
| u32 flow_repl; |
| |
| cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl, |
| sizeof(flow_ctl)); |
| ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); |
| flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace); |
| dev_dbg(dev, "%s - read ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n", |
| __func__, ctl_hs, flow_repl); |
| |
| ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE; |
| ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE; |
| ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY; |
| ctl_hs &= ~CP210X_SERIAL_DTR_MASK; |
| ctl_hs |= CP210X_SERIAL_DTR_SHIFT(CP210X_SERIAL_DTR_ACTIVE); |
| if (cflag & CRTSCTS) { |
| ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE; |
| |
| flow_repl &= ~CP210X_SERIAL_RTS_MASK; |
| flow_repl |= CP210X_SERIAL_RTS_SHIFT( |
| CP210X_SERIAL_RTS_FLOW_CTL); |
| dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); |
| } else { |
| ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE; |
| |
| flow_repl &= ~CP210X_SERIAL_RTS_MASK; |
| flow_repl |= CP210X_SERIAL_RTS_SHIFT( |
| CP210X_SERIAL_RTS_ACTIVE); |
| dev_dbg(dev, "%s - flow control = NONE\n", __func__); |
| } |
| |
| dev_dbg(dev, "%s - write ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n", |
| __func__, ctl_hs, flow_repl); |
| flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs); |
| flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl); |
| cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl, |
| sizeof(flow_ctl)); |
| } |
| |
| } |
| |
| static int cp210x_tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| return cp210x_tiocmset_port(port, set, clear); |
| } |
| |
| static int cp210x_tiocmset_port(struct usb_serial_port *port, |
| unsigned int set, unsigned int clear) |
| { |
| u16 control = 0; |
| |
| if (set & TIOCM_RTS) { |
| control |= CONTROL_RTS; |
| control |= CONTROL_WRITE_RTS; |
| } |
| if (set & TIOCM_DTR) { |
| control |= CONTROL_DTR; |
| control |= CONTROL_WRITE_DTR; |
| } |
| if (clear & TIOCM_RTS) { |
| control &= ~CONTROL_RTS; |
| control |= CONTROL_WRITE_RTS; |
| } |
| if (clear & TIOCM_DTR) { |
| control &= ~CONTROL_DTR; |
| control |= CONTROL_WRITE_DTR; |
| } |
| |
| dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control); |
| |
| return cp210x_write_u16_reg(port, CP210X_SET_MHS, control); |
| } |
| |
| static void cp210x_dtr_rts(struct usb_serial_port *p, int on) |
| { |
| if (on) |
| cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); |
| else |
| cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); |
| } |
| |
| static int cp210x_tiocmget(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| u8 control; |
| int result; |
| |
| cp210x_read_u8_reg(port, CP210X_GET_MDMSTS, &control); |
| |
| result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) |
| |((control & CONTROL_RTS) ? TIOCM_RTS : 0) |
| |((control & CONTROL_CTS) ? TIOCM_CTS : 0) |
| |((control & CONTROL_DSR) ? TIOCM_DSR : 0) |
| |((control & CONTROL_RING)? TIOCM_RI : 0) |
| |((control & CONTROL_DCD) ? TIOCM_CD : 0); |
| |
| dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control); |
| |
| return result; |
| } |
| |
| static void cp210x_break_ctl(struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| u16 state; |
| |
| if (break_state == 0) |
| state = BREAK_OFF; |
| else |
| state = BREAK_ON; |
| dev_dbg(&port->dev, "%s - turning break %s\n", __func__, |
| state == BREAK_OFF ? "off" : "on"); |
| cp210x_write_u16_reg(port, CP210X_SET_BREAK, state); |
| } |
| |
| static int cp210x_port_probe(struct usb_serial_port *port) |
| { |
| struct usb_serial *serial = port->serial; |
| struct usb_host_interface *cur_altsetting; |
| struct cp210x_port_private *port_priv; |
| int ret; |
| |
| port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); |
| if (!port_priv) |
| return -ENOMEM; |
| |
| cur_altsetting = serial->interface->cur_altsetting; |
| port_priv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber; |
| |
| usb_set_serial_port_data(port, port_priv); |
| |
| ret = cp210x_detect_swapped_line_ctl(port); |
| if (ret) { |
| kfree(port_priv); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int cp210x_port_remove(struct usb_serial_port *port) |
| { |
| struct cp210x_port_private *port_priv; |
| |
| port_priv = usb_get_serial_port_data(port); |
| kfree(port_priv); |
| |
| return 0; |
| } |
| |
| module_usb_serial_driver(serial_drivers, id_table); |
| |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |