| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Silicon Laboratories CP210x USB to RS232 serial adaptor driver |
| * |
| * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) |
| * |
| * Support to set flow control line levels using TIOCMGET and TIOCMSET |
| * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow |
| * control thanks to Munir Nassar nassarmu@real-time.com |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/usb.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb/serial.h> |
| #include <linux/gpio/driver.h> |
| #include <linux/bitops.h> |
| #include <linux/mutex.h> |
| |
| #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" |
| |
| /* |
| * Function Prototypes |
| */ |
| static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); |
| static void cp210x_close(struct usb_serial_port *); |
| static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *); |
| static void cp210x_get_termios_port(struct usb_serial_port *port, |
| tcflag_t *cflagp, unsigned int *baudp); |
| static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, |
| struct ktermios *); |
| static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, |
| struct ktermios*); |
| static bool cp210x_tx_empty(struct usb_serial_port *port); |
| static int cp210x_tiocmget(struct tty_struct *); |
| static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); |
| static int cp210x_tiocmset_port(struct usb_serial_port *port, |
| unsigned int, unsigned int); |
| static void cp210x_break_ctl(struct tty_struct *, int); |
| static int cp210x_attach(struct usb_serial *); |
| static void cp210x_disconnect(struct usb_serial *); |
| static void cp210x_release(struct usb_serial *); |
| static int cp210x_port_probe(struct usb_serial_port *); |
| static int cp210x_port_remove(struct usb_serial_port *); |
| static void cp210x_dtr_rts(struct usb_serial_port *p, int on); |
| |
| static const struct usb_device_id id_table[] = { |
| { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ |
| { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ |
| { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ |
| { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ |
| { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ |
| { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */ |
| { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ |
| { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ |
| { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */ |
| { USB_DEVICE(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, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */ |
| { USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */ |
| { USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */ |
| { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ |
| { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ |
| { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ |
| { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ |
| { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ |
| { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ |
| { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ |
| { USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */ |
| { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ |
| { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ |
| { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ |
| { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ |
| { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ |
| { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ |
| { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */ |
| { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */ |
| { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */ |
| { USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */ |
| { USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */ |
| { USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */ |
| { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */ |
| { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ |
| { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ |
| { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ |
| { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ |
| { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ |
| { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ |
| { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ |
| { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ |
| { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */ |
| { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ |
| { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */ |
| { USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */ |
| { USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */ |
| { USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */ |
| { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ |
| { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ |
| { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */ |
| { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ |
| { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ |
| { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ |
| { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ |
| { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ |
| { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ |
| { USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */ |
| { USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */ |
| { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ |
| { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */ |
| { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ |
| { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ |
| { USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */ |
| { USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */ |
| { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ |
| { USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */ |
| { USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */ |
| { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */ |
| { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ |
| { USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */ |
| { USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */ |
| { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ |
| { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ |
| { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ |
| { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ |
| { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
| { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ |
| { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */ |
| { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */ |
| { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
| { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ |
| { USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */ |
| { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ |
| { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ |
| { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ |
| { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ |
| { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ |
| { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ |
| { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ |
| { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ |
| { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ |
| { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
| { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ |
| { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ |
| { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ |
| { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ |
| { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ |
| { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ |
| { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ |
| { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ |
| { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ |
| { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */ |
| { USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */ |
| { USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */ |
| { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */ |
| { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */ |
| { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */ |
| { USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */ |
| { USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */ |
| { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */ |
| { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ |
| { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ |
| { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ |
| { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ |
| { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ |
| { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ |
| { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ |
| { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ |
| { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ |
| { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ |
| { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ |
| { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ |
| { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ |
| { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ |
| { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ |
| { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ |
| { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ |
| { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ |
| { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ |
| { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ |
| { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ |
| { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ |
| { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ |
| { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ |
| { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ |
| { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ |
| { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */ |
| { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ |
| { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ |
| { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ |
| { USB_DEVICE(0x3923, 0x7A0B) }, /* National Instruments USB Serial Console */ |
| { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ |
| { } /* Terminating Entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, id_table); |
| |
| struct cp210x_serial_private { |
| #ifdef CONFIG_GPIOLIB |
| struct gpio_chip gc; |
| bool gpio_registered; |
| u8 gpio_pushpull; |
| u8 gpio_altfunc; |
| u8 gpio_input; |
| #endif |
| u8 partnum; |
| speed_t max_speed; |
| bool use_actual_rate; |
| }; |
| |
| struct cp210x_port_private { |
| __u8 bInterfaceNumber; |
| bool has_swapped_line_ctl; |
| }; |
| |
| static struct usb_serial_driver cp210x_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "cp210x", |
| }, |
| .id_table = id_table, |
| .num_ports = 1, |
| .bulk_in_size = 256, |
| .bulk_out_size = 256, |
| .open = cp210x_open, |
| .close = cp210x_close, |
| .break_ctl = cp210x_break_ctl, |
| .set_termios = cp210x_set_termios, |
| .tx_empty = cp210x_tx_empty, |
| .tiocmget = cp210x_tiocmget, |
| .tiocmset = cp210x_tiocmset, |
| .attach = cp210x_attach, |
| .disconnect = cp210x_disconnect, |
| .release = cp210x_release, |
| .port_probe = cp210x_port_probe, |
| .port_remove = cp210x_port_remove, |
| .dtr_rts = cp210x_dtr_rts |
| }; |
| |
| static struct usb_serial_driver * const serial_drivers[] = { |
| &cp210x_device, NULL |
| }; |
| |
| /* Config request types */ |
| #define REQTYPE_HOST_TO_INTERFACE 0x41 |
| #define REQTYPE_INTERFACE_TO_HOST 0xc1 |
| #define REQTYPE_HOST_TO_DEVICE 0x40 |
| #define REQTYPE_DEVICE_TO_HOST 0xc0 |
| |
| /* Config request codes */ |
| #define CP210X_IFC_ENABLE 0x00 |
| #define CP210X_SET_BAUDDIV 0x01 |
| #define CP210X_GET_BAUDDIV 0x02 |
| #define CP210X_SET_LINE_CTL 0x03 |
| #define CP210X_GET_LINE_CTL 0x04 |
| #define CP210X_SET_BREAK 0x05 |
| #define CP210X_IMM_CHAR 0x06 |
| #define CP210X_SET_MHS 0x07 |
| #define CP210X_GET_MDMSTS 0x08 |
| #define CP210X_SET_XON 0x09 |
| #define CP210X_SET_XOFF 0x0A |
| #define CP210X_SET_EVENTMASK 0x0B |
| #define CP210X_GET_EVENTMASK 0x0C |
| #define CP210X_SET_CHAR 0x0D |
| #define CP210X_GET_CHARS 0x0E |
| #define CP210X_GET_PROPS 0x0F |
| #define CP210X_GET_COMM_STATUS 0x10 |
| #define CP210X_RESET 0x11 |
| #define CP210X_PURGE 0x12 |
| #define CP210X_SET_FLOW 0x13 |
| #define CP210X_GET_FLOW 0x14 |
| #define CP210X_EMBED_EVENTS 0x15 |
| #define CP210X_GET_EVENTSTATE 0x16 |
| #define CP210X_SET_CHARS 0x19 |
| #define CP210X_GET_BAUDRATE 0x1D |
| #define CP210X_SET_BAUDRATE 0x1E |
| #define CP210X_VENDOR_SPECIFIC 0xFF |
| |
| /* CP210X_IFC_ENABLE */ |
| #define UART_ENABLE 0x0001 |
| #define UART_DISABLE 0x0000 |
| |
| /* CP210X_(SET|GET)_BAUDDIV */ |
| #define BAUD_RATE_GEN_FREQ 0x384000 |
| |
| /* CP210X_(SET|GET)_LINE_CTL */ |
| #define BITS_DATA_MASK 0X0f00 |
| #define BITS_DATA_5 0X0500 |
| #define BITS_DATA_6 0X0600 |
| #define BITS_DATA_7 0X0700 |
| #define BITS_DATA_8 0X0800 |
| #define BITS_DATA_9 0X0900 |
| |
| #define BITS_PARITY_MASK 0x00f0 |
| #define BITS_PARITY_NONE 0x0000 |
| #define BITS_PARITY_ODD 0x0010 |
| #define BITS_PARITY_EVEN 0x0020 |
| #define BITS_PARITY_MARK 0x0030 |
| #define BITS_PARITY_SPACE 0x0040 |
| |
| #define BITS_STOP_MASK 0x000f |
| #define BITS_STOP_1 0x0000 |
| #define BITS_STOP_1_5 0x0001 |
| #define BITS_STOP_2 0x0002 |
| |
| /* CP210X_SET_BREAK */ |
| #define BREAK_ON 0x0001 |
| #define BREAK_OFF 0x0000 |
| |
| /* CP210X_(SET_MHS|GET_MDMSTS) */ |
| #define CONTROL_DTR 0x0001 |
| #define CONTROL_RTS 0x0002 |
| #define CONTROL_CTS 0x0010 |
| #define CONTROL_DSR 0x0020 |
| #define CONTROL_RING 0x0040 |
| #define CONTROL_DCD 0x0080 |
| #define CONTROL_WRITE_DTR 0x0100 |
| #define CONTROL_WRITE_RTS 0x0200 |
| |
| /* CP210X_VENDOR_SPECIFIC values */ |
| #define CP210X_READ_2NCONFIG 0x000E |
| #define CP210X_READ_LATCH 0x00C2 |
| #define CP210X_GET_PARTNUM 0x370B |
| #define CP210X_GET_PORTCONFIG 0x370C |
| #define CP210X_GET_DEVICEMODE 0x3711 |
| #define CP210X_WRITE_LATCH 0x37E1 |
| |
| /* Part number definitions */ |
| #define CP210X_PARTNUM_CP2101 0x01 |
| #define CP210X_PARTNUM_CP2102 0x02 |
| #define CP210X_PARTNUM_CP2103 0x03 |
| #define CP210X_PARTNUM_CP2104 0x04 |
| #define CP210X_PARTNUM_CP2105 0x05 |
| #define CP210X_PARTNUM_CP2108 0x08 |
| #define CP210X_PARTNUM_CP2102N_QFN28 0x20 |
| #define CP210X_PARTNUM_CP2102N_QFN24 0x21 |
| #define CP210X_PARTNUM_CP2102N_QFN20 0x22 |
| #define CP210X_PARTNUM_UNKNOWN 0xFF |
| |
| /* CP210X_GET_COMM_STATUS returns these 0x13 bytes */ |
| struct cp210x_comm_status { |
| __le32 ulErrors; |
| __le32 ulHoldReasons; |
| __le32 ulAmountInInQueue; |
| __le32 ulAmountInOutQueue; |
| u8 bEofReceived; |
| u8 bWaitForImmediate; |
| u8 bReserved; |
| } __packed; |
| |
| /* |
| * CP210X_PURGE - 16 bits passed in wValue of USB request. |
| * SiLabs app note AN571 gives a strange description of the 4 bits: |
| * bit 0 or bit 2 clears the transmit queue and 1 or 3 receive. |
| * writing 1 to all, however, purges cp2108 well enough to avoid the hang. |
| */ |
| #define PURGE_ALL 0x000f |
| |
| /* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */ |
| struct cp210x_flow_ctl { |
| __le32 ulControlHandshake; |
| __le32 ulFlowReplace; |
| __le32 ulXonLimit; |
| __le32 ulXoffLimit; |
| } __packed; |
| |
| /* cp210x_flow_ctl::ulControlHandshake */ |
| #define CP210X_SERIAL_DTR_MASK GENMASK(1, 0) |
| #define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode) |
| #define CP210X_SERIAL_CTS_HANDSHAKE BIT(3) |
| #define CP210X_SERIAL_DSR_HANDSHAKE BIT(4) |
| #define CP210X_SERIAL_DCD_HANDSHAKE BIT(5) |
| #define CP210X_SERIAL_DSR_SENSITIVITY BIT(6) |
| |
| /* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */ |
| #define CP210X_SERIAL_DTR_INACTIVE 0 |
| #define CP210X_SERIAL_DTR_ACTIVE 1 |
| #define CP210X_SERIAL_DTR_FLOW_CTL 2 |
| |
| /* cp210x_flow_ctl::ulFlowReplace */ |
| #define CP210X_SERIAL_AUTO_TRANSMIT BIT(0) |
| #define CP210X_SERIAL_AUTO_RECEIVE BIT(1) |
| #define CP210X_SERIAL_ERROR_CHAR BIT(2) |
| #define CP210X_SERIAL_NULL_STRIPPING BIT(3) |
| #define CP210X_SERIAL_BREAK_CHAR BIT(4) |
| #define CP210X_SERIAL_RTS_MASK GENMASK(7, 6) |
| #define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6) |
| #define CP210X_SERIAL_XOFF_CONTINUE BIT(31) |
| |
| /* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */ |
| #define CP210X_SERIAL_RTS_INACTIVE 0 |
| #define CP210X_SERIAL_RTS_ACTIVE 1 |
| #define CP210X_SERIAL_RTS_FLOW_CTL 2 |
| |
| /* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */ |
| struct cp210x_pin_mode { |
| u8 eci; |
| u8 sci; |
| } __packed; |
| |
| #define CP210X_PIN_MODE_MODEM 0 |
| #define CP210X_PIN_MODE_GPIO BIT(0) |
| |
| /* |
| * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes. |
| * Structure needs padding due to unused/unspecified bytes. |
| */ |
| struct cp210x_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; |
| |
| /* 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) |
| |
| /* 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) |
| |
| /* 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(struct usb_serial *serial, speed_t baud) |
| { |
| struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
| unsigned int prescale = 1; |
| unsigned int div; |
| |
| baud = clamp(baud, 300u, priv->max_speed); |
| |
| 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; |
| |
| baud = tty->termios.c_ospeed; |
| |
| /* |
| * 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. |
| */ |
| if (priv->use_actual_rate) |
| baud = cp210x_get_actual_rate(serial, baud); |
| else if (baud < 1000000) |
| baud = cp210x_get_an205_rate(baud); |
| else if (baud > priv->max_speed) |
| baud = priv->max_speed; |
| |
| 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 = cp210x_read_vendor_block(serial, req_type, |
| CP210X_READ_LATCH, &buf, sizeof(buf)); |
| 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); |
| |
| 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); |
| } |
| |
| 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_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 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; |
| |
| /* |
| * We only support 4 GPIOs even on the QFN28 package, because |
| * config locations of GPIOs 4-6 determined using reverse |
| * engineering revealed conflicting offsets with other |
| * documented functions. So we'll just play it safe for now. |
| */ |
| 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; |
| |
| /* |
| * 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_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 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 { |
| 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->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"); |
