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cp210x.c
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// SPDX-License-Identifier: GPL-2.0
/*
* Silicon Laboratories CP210x USB to RS232 serial adaptor driver
*
* Copyright (C) 2005 Craig Shelley ([email protected])
*
* Support to set flow control line levels using TIOCMGET and TIOCMSET
* thanks to Karl Hiramoto [email protected]. RTSCTS hardware flow
* control thanks to Munir Nassar [email protected]
*
*/
#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,
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_startup(struct usb_serial *);
static void cp210x_release(struct usb_serial *);
static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
static void cp210x_process_read_urb(struct urb * urb);
static int cp210x_ioctl(struct tty_struct *tty, unsigned int cmd,
unsigned long arg);
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
{ USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
{ USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
{ USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
{ USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
{ USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
{ USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
{ USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
{ USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */
{ USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
{ USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
{ USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
{ USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
{ USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
{ USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
{ USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
{ USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
{ USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
{ USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
{ USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
{ USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
{ USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
{ USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
{ USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
{ USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
{ USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
{ USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
{ USB_DEVICE(0x10C4, 0x8056) }, /* Lorenz Messtechnik devices */
{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
{ USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
{ USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
{ USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
{ USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
{ USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
{ USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
{ USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
{ USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
{ USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
{ USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
{ USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
{ USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
{ USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
{ USB_DEVICE(0x10C4, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */
{ USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */
{ USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */
{ USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
{ USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
{ USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
{ USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
{ USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
{ USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
{ USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
{ USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
{ USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
{ USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
{ USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
{ USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
{ USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
{ USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
{ USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
{ USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
{ USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
{ USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
{ USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */
{ USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */
{ USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
{ USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
{ USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
{ USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
{ USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
{ USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */
{ USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
{ USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
{ USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
{ USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
{ USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
{ USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
{ USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */
{ USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */
{ USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */
{ USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
{ USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
{ USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
{ USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
{ USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
{ USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
{ USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
{ USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
{ USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
{ USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
{ USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
{ USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
{ USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
{ USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
{ USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
{ USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
{ USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
{ USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
{ USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
{ USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */
{ USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
{ USB_DEVICE(0x10C4, 0xEA80) }, /* 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, 0x1005) }, /* ELDAT Easywave RX09 dongle */
{ USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 dongle */
{ 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_port_private {
u8 bPartNumber;
u8 bInterfaceNumber;
bool has_swapped_line_ctl;
int baud_bas;
int custom_divisor;
int flags;
char prev_status;
char transmit_empty;
unsigned short max_packet_size;
struct mutex lock;
};
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,
.ioctl = cp210x_ioctl,
.break_ctl = cp210x_break_ctl,
.set_termios = cp210x_set_termios,
.tx_empty = cp210x_tx_empty,
.tiocmget = cp210x_tiocmget,
.tiocmset = cp210x_tiocmset,
.tiocmiwait = usb_serial_generic_tiocmiwait,
.get_icount = usb_serial_generic_get_icount,
.process_read_urb = cp210x_process_read_urb,
// .process_read_urb = usb_serial_generic_read_bulk_callback,
.attach = cp210x_startup,
.release = cp210x_release,
.dtr_rts = cp210x_dtr_rts
};
/* IOCTLs */
#define IOCTL_GPIOGET 0x8000
#define IOCTL_GPIOSET 0x8001
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
#define CP210X_STATUS_B0_MASK (CONTROL_CTS | CONTROL_DSR | CONTROL_RING | CONTROL_DCD)
#define CP210X_ESCAPE 0x1E
#define CP210X_DCD_CHANGE_BIT 0x08
/* 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 */
#define CP210X_COMM_STATUS_SIZE 0x13
struct cp210x_comm_status {
__le32 ulErrors;
__le32 ulHoldReasons;
__le32 ulAmountInInQueue;
__le32 ulAmountInOutQueue;
u8 bEofReceived;
u8 bWaitForImmediate;
u8 bReserved;
} __packed;
/*
* cp210x_get_config
* Reads from the CP210x configuration registers
* 'size' is specified in bytes.
* 'data' is a pointer to a pre-allocated array of integers large
* enough to hold 'size' bytes (with 4 bytes to each integer)
*/
static int cp210x_get_config(struct usb_serial_port *port, u8 requestType, u8 req, int val,
unsigned int *data, unsigned int bufsize)
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
__le32 *dmabuf;
int result, i, length;
/* Number of integers required to contain the array */
length = (((bufsize - 1) | 3) + 1) / 4;
dmabuf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
if (!dmabuf) {
dev_err(&port->dev, "%s: out of memory\n", __func__);
return -ENOMEM;
}
/* Issue the request, attempting to read 'bufsize' bytes */
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
req, requestType, val,
port_priv->bInterfaceNumber, dmabuf, bufsize,
USB_CTRL_GET_TIMEOUT);
/* Convert data into an array of integers */
for (i = 0; i < length; i++) {
data[i] = le32_to_cpu(dmabuf[i]);
}
kfree(dmabuf);
if (result != bufsize) {
dev_dbg(&port->dev, "%s: Unable to send config request, request=0x%x size=%d result=%d\n", __func__,
req, bufsize, result);
if (result > 0) {
result = -EPROTO;
}
return result;
}
return 0;
}
/*
* cp210x_set_config
* Writes to the CP210x configuration registers
* Values less than 16 bits wide are sent directly
* 'bufsize' is specified in bytes.
*/
static int cp210x_set_config(struct usb_serial_port *port, u8 requestType, u8 req, int val, unsigned int *data, unsigned int bufsize)
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
__le32 *dmabuf = NULL;
int result;
unsigned int i, length = 0;
if (bufsize) {
/* Number of integers required to contain the array */
length = (((bufsize - 1) | 3) + 1) / 4;
dmabuf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
if (!dmabuf) {
dev_err(&port->dev, "%s: out of memory\n", __func__);
return -ENOMEM;
}
/* Array of integers into bytes */
for (i = 0; i < length; i++) {
dmabuf[i] = cpu_to_le32(data[i]);
}
}
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
req, requestType, val,
port_priv->bInterfaceNumber, dmabuf, bufsize,
USB_CTRL_SET_TIMEOUT);
if (dmabuf) {
kfree(dmabuf);
}
if ((bufsize && (result != bufsize)) || (result < 0)) {
dev_dbg(&port->dev, "%s: Unable to send request, request=0x%x size=%d result=%d\n", __func__,
req, bufsize, result);
if (result >= 0) {
result = -EIO;
}
return result;
}
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 get_lsr_info(struct usb_serial_port *port,
struct serial_struct __user *retinfo) {
struct cp210x_port_private *priv = usb_get_serial_port_data(port);
unsigned int result = 0;
if (!retinfo) {
return -EFAULT;
}
if (priv->transmit_empty) {
result = TIOCSER_TEMT;
}
if (copy_to_user(retinfo, &result, sizeof (unsigned int))) {
return -EFAULT;
}
return 0;
}
static int cp210x_ioctl(struct tty_struct *tty, unsigned int cmd,
unsigned long arg) {
struct usb_serial_port *port = tty->driver_data;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
int result = 0;
unsigned long latch_buf = 0;
switch (cmd) {
case IOCTL_GPIOGET:
if ((port_priv->bPartNumber == CP210X_PARTNUM_CP2103) ||
(port_priv->bPartNumber == CP210X_PARTNUM_CP2104)) {
result = cp210x_get_config(port,
REQTYPE_DEVICE_TO_HOST,
CP210X_VENDOR_SPECIFIC,
CP210X_READ_LATCH,
(unsigned int*)&latch_buf, 1);
if (result != 0) {
return result;
}
if (copy_to_user((unsigned int*)arg, &latch_buf, 1)) {
return -EFAULT;
}
return 0;
} else if (port_priv->bPartNumber == CP210X_PARTNUM_CP2105) {
result = cp210x_get_config(port, REQTYPE_INTERFACE_TO_HOST,
CP210X_VENDOR_SPECIFIC, CP210X_READ_LATCH,
(unsigned int *)&latch_buf, 1);
if (result != 0) {
return result;
}
if (copy_to_user((unsigned int*)arg, &latch_buf, 1)) {
return -EFAULT;
}
return 0;
} else if (port_priv->bPartNumber == CP210X_PARTNUM_CP2108) {
result = cp210x_get_config(port, REQTYPE_DEVICE_TO_HOST,
CP210X_VENDOR_SPECIFIC, CP210X_READ_LATCH,
(unsigned int *)&latch_buf, 2);
if (result != 0) {
return result;
}
if (copy_to_user((unsigned int *)arg, &latch_buf, 2)) {
return -EFAULT;
}
return 0;
} else {
return -ENOTSUPP;
}
break;
case IOCTL_GPIOSET:
if ((port_priv->bPartNumber == CP210X_PARTNUM_CP2103) ||
(port_priv->bPartNumber == CP210X_PARTNUM_CP2104)) {
if (copy_from_user(&latch_buf, (unsigned int*)arg, 2)) {
return -EFAULT;
}
result = usb_control_msg(port->serial->dev,
usb_sndctrlpipe(port->serial->dev, 0),
CP210X_VENDOR_SPECIFIC, REQTYPE_HOST_TO_DEVICE,
CP210X_WRITE_LATCH, latch_buf, NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (result != 0) {
return result;
}
return 0;
} else if (port_priv->bPartNumber == CP210X_PARTNUM_CP2105) {
if (copy_from_user(&latch_buf, (unsigned int *)arg, 2)) {
return -EFAULT;
}
return cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE,
CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH,
(unsigned int *)&latch_buf, 2);
} else if (port_priv->bPartNumber == CP210X_PARTNUM_CP2108) {
if (copy_from_user(&latch_buf, (unsigned int *)arg, 4)) {
return -EFAULT;
}
return cp210x_set_config(port, REQTYPE_HOST_TO_DEVICE,
CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH,
(unsigned int *)&latch_buf, 4);
} else {
return -ENOTSUPP;
}
break;
case TIOCSERGETLSR:
return get_lsr_info(port, (struct serial_struct __user *)arg);
default:
return -ENOIOCTLCMD;
}
}
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
{
int result;
result = cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE, CP210X_IFC_ENABLE, UART_ENABLE, NULL, 0);
if (result) {
dev_err(&port->dev, "%s - Unable to enable UART: %d\n", __func__, result);
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);
}
result = cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE, CP210X_EMBED_EVENTS, CP210X_ESCAPE, NULL, 0);
if (result) {
dev_err(&port->dev, "%s: Unable to embed events in UART\n", __func__);
return result;
}
return usb_serial_generic_open(tty, port);
}
static void cp210x_close(struct usb_serial_port *port)
{
usb_serial_generic_close(port);
cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE, CP210X_IFC_ENABLE, UART_DISABLE, NULL, 0);
}
/*
* 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, "%s: failed to get comm status: %d\n", __func__, 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;
unsigned int modem_ctl[4];
u32 baud;
unsigned int bits;
cp210x_get_config(port, REQTYPE_INTERFACE_TO_HOST, CP210X_GET_BAUDRATE, 0, &baud, 4);
dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
*baudp = baud;
cflag = *cflagp;
cp210x_get_config(port, REQTYPE_INTERFACE_TO_HOST, CP210X_GET_LINE_CTL, 0, &bits, 2);
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: // fall through
default:
dev_dbg(dev, "%s: data bits = 0x%x (unsupported, using 8 instead)\n", __func__, bits & BITS_DATA_MASK);
cflag |= CS8;
bits &= ~BITS_DATA_MASK;
bits |= BITS_DATA_8;
cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE, CP210X_SET_LINE_CTL, bits, NULL, 0);
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: Unsupported parity mode 0x%x, disabling parity\n", __func__, bits & BITS_PARITY_MASK);
cflag &= ~PARENB;
bits &= ~BITS_PARITY_MASK;
cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE, CP210X_SET_LINE_CTL, bits, NULL, 0);
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_2:
dev_dbg(dev, "%s - stop bits = 2\n", __func__);
cflag |= CSTOPB;
break;
case BITS_STOP_1_5: // fall through
default:
dev_dbg(dev, "%s: Unsupported number of stop bits 0x%x, using 1\n", __func__, bits & BITS_STOP_MASK);
bits &= ~BITS_STOP_MASK;
cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE,
CP210X_SET_LINE_CTL, bits, NULL, 0);
break;
}
cp210x_get_config(port, REQTYPE_INTERFACE_TO_HOST,
CP210X_GET_FLOW, 0, modem_ctl, 16);
if (modem_ctl[0] & 0x0008) {
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 the actual rate, a valid rate on
* cp2102 or cp2103, or to an arbitrary rate in [1M, max_speed].
*
* NOTE: B0 is not implemented.
*/
baud = cp210x_quantise_baudrate(baud);
dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
if (cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE,
CP210X_SET_BAUDRATE, 0, &baud, sizeof (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;
unsigned int bits;
unsigned int modem_ctl[4];
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_config(port, REQTYPE_INTERFACE_TO_HOST,
CP210X_GET_LINE_CTL, 0, &bits, 2);
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:
bits |= BITS_DATA_8;
dev_dbg(dev, "%s: cp210x driver doesn't support the number of bits requested (0x%x), using 8 bit mode\n", __func__, cflag & CSIZE);
break;
}
if (cp210x_set_config(port, REQTYPE_HOST_TO_INTERFACE,
CP210X_SET_LINE_CTL, bits, NULL, 0)) {
dev_dbg(dev, "%s: Number of data bits requested not supported by device\n", __func__);
}
}