| /* |
| * Silicon Laboratories CP210x USB to RS232 serial adaptor driver |
| * |
| * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License version |
| * 2 as published by the Free Software Foundation. |
| * |
| * Support to set flow control line levels using TIOCMGET and TIOCMSET |
| * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow |
| * control thanks to Munir Nassar nassarmu@real-time.com |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/usb.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb/serial.h> |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_VERSION "v0.09" |
| #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 *port); |
| static void cp210x_get_termios_port(struct usb_serial_port *port, |
| unsigned int *cflagp, unsigned int *baudp); |
| static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, |
| struct ktermios *); |
| static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, |
| struct ktermios*); |
| static 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 bool debug; |
| |
| 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(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ |
| { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ |
| { 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(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, 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(0x10C4, 0x8156) }, /* B&G H3000 link cable */ |
| { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ |
| { 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, 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, 0x8293) }, /* Telegesis ETRX2USB */ |
| { 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, 0x8477) }, /* Balluff RFID */ |
| { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ |
| { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ |
| { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ |
| { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ |
| { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */ |
| { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ |
| { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ |
| { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ |
| { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ |
| { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ |
| { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
| { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ |
| { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
| { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ |
| { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ |
| { 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(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ |
| { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ |
| { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ |
| { } /* Terminating Entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, id_table); |
| |
| struct cp210x_port_private { |
| __u8 bInterfaceNumber; |
| }; |
| |
| static struct usb_driver cp210x_driver = { |
| .name = "cp210x", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .id_table = id_table, |
| .no_dynamic_id = 1, |
| }; |
| |
| static struct usb_serial_driver cp210x_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "cp210x", |
| }, |
| .usb_driver = &cp210x_driver, |
| .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, |
| .tiocmget = cp210x_tiocmget, |
| .tiocmset = cp210x_tiocmset, |
| .attach = cp210x_startup, |
| .release = cp210x_release, |
| .dtr_rts = cp210x_dtr_rts |
| }; |
| |
| /* Config request types */ |
| #define REQTYPE_HOST_TO_DEVICE 0x41 |
| #define REQTYPE_DEVICE_TO_HOST 0xc1 |
| |
| /* Config request codes */ |
| #define CP210X_IFC_ENABLE 0x00 |
| #define CP210X_SET_BAUDDIV 0x01 |
| #define CP210X_GET_BAUDDIV 0x02 |
| #define CP210X_SET_LINE_CTL 0x03 |
| #define CP210X_GET_LINE_CTL 0x04 |
| #define CP210X_SET_BREAK 0x05 |
| #define CP210X_IMM_CHAR 0x06 |
| #define CP210X_SET_MHS 0x07 |
| #define CP210X_GET_MDMSTS 0x08 |
| #define CP210X_SET_XON 0x09 |
| #define CP210X_SET_XOFF 0x0A |
| #define CP210X_SET_EVENTMASK 0x0B |
| #define CP210X_GET_EVENTMASK 0x0C |
| #define CP210X_SET_CHAR 0x0D |
| #define CP210X_GET_CHARS 0x0E |
| #define CP210X_GET_PROPS 0x0F |
| #define CP210X_GET_COMM_STATUS 0x10 |
| #define CP210X_RESET 0x11 |
| #define CP210X_PURGE 0x12 |
| #define CP210X_SET_FLOW 0x13 |
| #define CP210X_GET_FLOW 0x14 |
| #define CP210X_EMBED_EVENTS 0x15 |
| #define CP210X_GET_EVENTSTATE 0x16 |
| #define CP210X_SET_CHARS 0x19 |
| #define CP210X_GET_BAUDRATE 0x1D |
| #define CP210X_SET_BAUDRATE 0x1E |
| |
| /* CP210X_IFC_ENABLE */ |
| #define UART_ENABLE 0x0001 |
| #define UART_DISABLE 0x0000 |
| |
| /* CP210X_(SET|GET)_BAUDDIV */ |
| #define BAUD_RATE_GEN_FREQ 0x384000 |
| |
| /* CP210X_(SET|GET)_LINE_CTL */ |
| #define BITS_DATA_MASK 0X0f00 |
| #define BITS_DATA_5 0X0500 |
| #define BITS_DATA_6 0X0600 |
| #define BITS_DATA_7 0X0700 |
| #define BITS_DATA_8 0X0800 |
| #define BITS_DATA_9 0X0900 |
| |
| #define BITS_PARITY_MASK 0x00f0 |
| #define BITS_PARITY_NONE 0x0000 |
| #define BITS_PARITY_ODD 0x0010 |
| #define BITS_PARITY_EVEN 0x0020 |
| #define BITS_PARITY_MARK 0x0030 |
| #define BITS_PARITY_SPACE 0x0040 |
| |
| #define BITS_STOP_MASK 0x000f |
| #define BITS_STOP_1 0x0000 |
| #define BITS_STOP_1_5 0x0001 |
| #define BITS_STOP_2 0x0002 |
| |
| /* CP210X_SET_BREAK */ |
| #define BREAK_ON 0x0001 |
| #define BREAK_OFF 0x0000 |
| |
| /* CP210X_(SET_MHS|GET_MDMSTS) */ |
| #define CONTROL_DTR 0x0001 |
| #define CONTROL_RTS 0x0002 |
| #define CONTROL_CTS 0x0010 |
| #define CONTROL_DSR 0x0020 |
| #define CONTROL_RING 0x0040 |
| #define CONTROL_DCD 0x0080 |
| #define CONTROL_WRITE_DTR 0x0100 |
| #define CONTROL_WRITE_RTS 0x0200 |
| |
| /* |
| * cp210x_get_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 request, |
| unsigned int *data, int size) |
| { |
| struct usb_serial *serial = port->serial; |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| __le32 *buf; |
| int result, i, length; |
| |
| /* Number of integers required to contain the array */ |
| length = (((size - 1) | 3) + 1)/4; |
| |
| buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); |
| if (!buf) { |
| dev_err(&port->dev, "%s - out of memory.\n", __func__); |
| return -ENOMEM; |
| } |
| |
| /* Issue the request, attempting to read 'size' bytes */ |
| result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| request, REQTYPE_DEVICE_TO_HOST, 0x0000, |
| port_priv->bInterfaceNumber, buf, size, |
| USB_CTRL_GET_TIMEOUT); |
| |
| /* Convert data into an array of integers */ |
| for (i = 0; i < length; i++) |
| data[i] = le32_to_cpu(buf[i]); |
| |
| kfree(buf); |
| |
| if (result != size) { |
| dbg("%s - Unable to send config request, " |
| "request=0x%x size=%d result=%d\n", |
| __func__, request, size, 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 |
| * 'size' is specified in bytes. |
| */ |
| static int cp210x_set_config(struct usb_serial_port *port, u8 request, |
| unsigned int *data, int size) |
| { |
| struct usb_serial *serial = port->serial; |
| struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
| __le32 *buf; |
| int result, i, length; |
| |
| /* Number of integers required to contain the array */ |
| length = (((size - 1) | 3) + 1)/4; |
| |
| buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); |
| if (!buf) { |
| dev_err(&port->dev, "%s - out of memory.\n", |
| __func__); |
| return -ENOMEM; |
| } |
| |
| /* Array of integers into bytes */ |
| for (i = 0; i < length; i++) |
| buf[i] = cpu_to_le32(data[i]); |
| |
| if (size > 2) { |
| result = usb_control_msg(serial->dev, |
| usb_sndctrlpipe(serial->dev, 0), |
| request, REQTYPE_HOST_TO_DEVICE, 0x0000, |
| port_priv->bInterfaceNumber, buf, size, |
| USB_CTRL_SET_TIMEOUT); |
| } else { |
| result = usb_control_msg(serial->dev, |
| usb_sndctrlpipe(serial->dev, 0), |
| request, REQTYPE_HOST_TO_DEVICE, data[0], |
| port_priv->bInterfaceNumber, NULL, 0, |
| USB_CTRL_SET_TIMEOUT); |
| } |
| |
| kfree(buf); |
| |
| if ((size > 2 && result != size) || result < 0) { |
| dbg("%s - Unable to send request, " |
| "request=0x%x size=%d result=%d\n", |
| __func__, request, size, result); |
| if (result > 0) |
| result = -EPROTO; |
| |
| return result; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * cp210x_set_config_single |
| * Convenience function for calling cp210x_set_config on single data values |
| * without requiring an integer pointer |
| */ |
| static inline int cp210x_set_config_single(struct usb_serial_port *port, |
| u8 request, unsigned int data) |
| { |
| return cp210x_set_config(port, request, &data, 2); |
| } |
| |
| /* |
| * cp210x_quantise_baudrate |
| * Quantises the baud rate as per AN205 Table 1 |
| */ |
| static unsigned int cp210x_quantise_baudrate(unsigned int baud) { |
| if (baud <= 300) |
| baud = 300; |
| else if (baud <= 600) baud = 600; |
| else if (baud <= 1200) baud = 1200; |
| else if (baud <= 1800) baud = 1800; |
| else if (baud <= 2400) baud = 2400; |
| else if (baud <= 4000) baud = 4000; |
| else if (baud <= 4803) baud = 4800; |
| else if (baud <= 7207) baud = 7200; |
| else if (baud <= 9612) baud = 9600; |
| else if (baud <= 14428) baud = 14400; |
| else if (baud <= 16062) baud = 16000; |
| else if (baud <= 19250) baud = 19200; |
| else if (baud <= 28912) baud = 28800; |
| else if (baud <= 38601) baud = 38400; |
| else if (baud <= 51558) baud = 51200; |
| else if (baud <= 56280) baud = 56000; |
| else if (baud <= 58053) baud = 57600; |
| else if (baud <= 64111) baud = 64000; |
| else if (baud <= 77608) baud = 76800; |
| else if (baud <= 117028) baud = 115200; |
| else if (baud <= 129347) baud = 128000; |
| else if (baud <= 156868) baud = 153600; |
| else if (baud <= 237832) baud = 230400; |
| else if (baud <= 254234) baud = 250000; |
| else if (baud <= 273066) baud = 256000; |
| else if (baud <= 491520) baud = 460800; |
| else if (baud <= 567138) baud = 500000; |
| else if (baud <= 670254) baud = 576000; |
| else if (baud < 1000000) |
| baud = 921600; |
| else if (baud > 2000000) |
| baud = 2000000; |
| return baud; |
| } |
| |
| static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| int result; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| result = cp210x_set_config_single(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) |
| { |
| dbg("%s - port %d", __func__, port->number); |
| |
| usb_serial_generic_close(port); |
| |
| mutex_lock(&port->serial->disc_mutex); |
| if (!port->serial->disconnected) |
| cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); |
| mutex_unlock(&port->serial->disc_mutex); |
| } |
| |
| /* |
| * cp210x_get_termios |
| * Reads the baud rate, data bits, parity, stop bits and flow control mode |
| * from the device, corrects any unsupported values, and configures the |
| * termios structure to reflect the state of the device |
| */ |
| static void cp210x_get_termios(struct tty_struct *tty, |
| struct usb_serial_port *port) |
| { |
| unsigned int baud; |
| |
| if (tty) { |
| cp210x_get_termios_port(tty->driver_data, |
| &tty->termios->c_cflag, &baud); |
| tty_encode_baud_rate(tty, baud, baud); |
| } |
| |
| else { |
| unsigned int cflag; |
| cflag = 0; |
| cp210x_get_termios_port(port, &cflag, &baud); |
| } |
| } |
| |
| /* |
| * cp210x_get_termios_port |
| * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. |
| */ |
| static void cp210x_get_termios_port(struct usb_serial_port *port, |
| unsigned int *cflagp, unsigned int *baudp) |
| { |
| unsigned int cflag, modem_ctl[4]; |
| unsigned int baud; |
| unsigned int bits; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); |
| |
| dbg("%s - baud rate = %d", __func__, baud); |
| *baudp = baud; |
| |
| cflag = *cflagp; |
| |
| cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
| cflag &= ~CSIZE; |
| switch (bits & BITS_DATA_MASK) { |
| case BITS_DATA_5: |
| dbg("%s - data bits = 5", __func__); |
| cflag |= CS5; |
| break; |
| case BITS_DATA_6: |
| dbg("%s - data bits = 6", __func__); |
| cflag |= CS6; |
| break; |
| case BITS_DATA_7: |
| dbg("%s - data bits = 7", __func__); |
| cflag |= CS7; |
| break; |
| case BITS_DATA_8: |
| dbg("%s - data bits = 8", __func__); |
| cflag |= CS8; |
| break; |
| case BITS_DATA_9: |
| dbg("%s - data bits = 9 (not supported, using 8 data bits)", |
| __func__); |
| cflag |= CS8; |
| bits &= ~BITS_DATA_MASK; |
| bits |= BITS_DATA_8; |
| cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
| break; |
| default: |
| dbg("%s - Unknown number of data bits, using 8", __func__); |
| cflag |= CS8; |
| bits &= ~BITS_DATA_MASK; |
| bits |= BITS_DATA_8; |
| cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
| break; |
| } |
| |
| switch (bits & BITS_PARITY_MASK) { |
| case BITS_PARITY_NONE: |
| dbg("%s - parity = NONE", __func__); |
| cflag &= ~PARENB; |
| break; |
| case BITS_PARITY_ODD: |
| dbg("%s - parity = ODD", __func__); |
| cflag |= (PARENB|PARODD); |
| break; |
| case BITS_PARITY_EVEN: |
| dbg("%s - parity = EVEN", __func__); |
| cflag &= ~PARODD; |
| cflag |= PARENB; |
| break; |
| case BITS_PARITY_MARK: |
| dbg("%s - parity = MARK", __func__); |
| cflag |= (PARENB|PARODD|CMSPAR); |
| break; |
| case BITS_PARITY_SPACE: |
| dbg("%s - parity = SPACE", __func__); |
| cflag &= ~PARODD; |
| cflag |= (PARENB|CMSPAR); |
| break; |
| default: |
| dbg("%s - Unknown parity mode, disabling parity", __func__); |
| cflag &= ~PARENB; |
| bits &= ~BITS_PARITY_MASK; |
| cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
| break; |
| } |
| |
| cflag &= ~CSTOPB; |
| switch (bits & BITS_STOP_MASK) { |
| case BITS_STOP_1: |
| dbg("%s - stop bits = 1", __func__); |
| break; |
| case BITS_STOP_1_5: |
| dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", |
| __func__); |
| bits &= ~BITS_STOP_MASK; |
| cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
| break; |
| case BITS_STOP_2: |
| dbg("%s - stop bits = 2", __func__); |
| cflag |= CSTOPB; |
| break; |
| default: |
| dbg("%s - Unknown number of stop bits, using 1 stop bit", |
| __func__); |
| bits &= ~BITS_STOP_MASK; |
| cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); |
| break; |
| } |
| |
| cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); |
| if (modem_ctl[0] & 0x0008) { |
| dbg("%s - flow control = CRTSCTS", __func__); |
| cflag |= CRTSCTS; |
| } else { |
| dbg("%s - flow control = NONE", __func__); |
| cflag &= ~CRTSCTS; |
| } |
| |
| *cflagp = cflag; |
| } |
| |
| /* |
| * CP2101 supports the following baud rates: |
| * |
| * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, |
| * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 |
| * |
| * CP2102 and CP2103 support the following additional rates: |
| * |
| * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, |
| * 576000 |
| * |
| * The device will map a requested rate to a supported one, but the result |
| * of requests for rates greater than 1053257 is undefined (see AN205). |
| * |
| * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, |
| * respectively, with an error less than 1%. The actual rates are determined |
| * by |
| * |
| * div = round(freq / (2 x prescale x request)) |
| * actual = freq / (2 x prescale x div) |
| * |
| * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps |
| * or 1 otherwise. |
| * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 |
| * otherwise. |
| */ |
| static void cp210x_change_speed(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| u32 baud; |
| |
| baud = tty->termios->c_ospeed; |
| |
| /* This maps the requested rate to a rate valid on cp2102 or cp2103, |
| * or to an arbitrary rate in [1M,2M]. |
| * |
| * NOTE: B0 is not implemented. |
| */ |
| baud = cp210x_quantise_baudrate(baud); |
| |
| dbg("%s - setting baud rate to %u", __func__, baud); |
| if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &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) |
| { |
| unsigned int cflag, old_cflag; |
| unsigned int bits; |
| unsigned int modem_ctl[4]; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (!tty) |
| return; |
| |
| 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, CP210X_GET_LINE_CTL, &bits, 2); |
| bits &= ~BITS_DATA_MASK; |
| switch (cflag & CSIZE) { |
| case CS5: |
| bits |= BITS_DATA_5; |
| dbg("%s - data bits = 5", __func__); |
| break; |
| case CS6: |
| bits |= BITS_DATA_6; |
| dbg("%s - data bits = 6", __func__); |
| break; |
| case CS7: |
| bits |= BITS_DATA_7; |
| dbg("%s - data bits = 7", __func__); |
| break; |
| case CS8: |
| bits |= BITS_DATA_8; |
| dbg("%s - data bits = 8", __func__); |
| break; |
| /*case CS9: |
| bits |= BITS_DATA_9; |
| dbg("%s - data bits = 9", __func__); |
| break;*/ |
| default: |
| dbg("cp210x driver does not " |
| "support the number of bits requested," |
| " using 8 bit mode\n"); |
| bits |= BITS_DATA_8; |
| break; |
| } |
| if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
| dbg("Number of data bits requested " |
| "not supported by device\n"); |
| } |
| |
| if ((cflag & (PARENB|PARODD|CMSPAR)) != |
| (old_cflag & (PARENB|PARODD|CMSPAR))) { |
| cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
| bits &= ~BITS_PARITY_MASK; |
| if (cflag & PARENB) { |
| if (cflag & CMSPAR) { |
| if (cflag & PARODD) { |
| bits |= BITS_PARITY_MARK; |
| dbg("%s - parity = MARK", __func__); |
| } else { |
| bits |= BITS_PARITY_SPACE; |
| dbg("%s - parity = SPACE", __func__); |
| } |
| } else { |
| if (cflag & PARODD) { |
| bits |= BITS_PARITY_ODD; |
| dbg("%s - parity = ODD", __func__); |
| } else { |
| bits |= BITS_PARITY_EVEN; |
| dbg("%s - parity = EVEN", __func__); |
| } |
| } |
| } |
| if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
| dbg("Parity mode not supported " |
| "by device\n"); |
| } |
| |
| if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { |
| cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); |
| bits &= ~BITS_STOP_MASK; |
| if (cflag & CSTOPB) { |
| bits |= BITS_STOP_2; |
| dbg("%s - stop bits = 2", __func__); |
| } else { |
| bits |= BITS_STOP_1; |
| dbg("%s - stop bits = 1", __func__); |
| } |
| if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) |
| dbg("Number of stop bits requested " |
| "not supported by device\n"); |
| } |
| |
| if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { |
| cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); |
| dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", |
| __func__, modem_ctl[0], modem_ctl[1], |
| modem_ctl[2], modem_ctl[3]); |
| |
| if (cflag & CRTSCTS) { |
| modem_ctl[0] &= ~0x7B; |
| modem_ctl[0] |= 0x09; |
| modem_ctl[1] = 0x80; |
| dbg("%s - flow control = CRTSCTS", __func__); |
| } else { |
| modem_ctl[0] &= ~0x7B; |
| modem_ctl[0] |= 0x01; |
| modem_ctl[1] |= 0x40; |
| dbg("%s - flow control = NONE", __func__); |
| } |
| |
| dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", |
| __func__, modem_ctl[0], modem_ctl[1], |
| modem_ctl[2], modem_ctl[3]); |
| cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); |
| } |
| |
| } |
| |
| 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) |
| { |
| unsigned int control = 0; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| 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; |
| } |
| |
| dbg("%s - control = 0x%.4x", __func__, control); |
| |
| return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); |
| } |
| |
| 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; |
| unsigned int control; |
| int result; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); |
| |
| 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); |
| |
| dbg("%s - control = 0x%.2x", __func__, control); |
| |
| return result; |
| } |
| |
| static void cp210x_break_ctl (struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| unsigned int state; |
| |
| dbg("%s - port %d", __func__, port->number); |
| if (break_state == 0) |
| state = BREAK_OFF; |
| else |
| state = BREAK_ON; |
| dbg("%s - turning break %s", __func__, |
| state == BREAK_OFF ? "off" : "on"); |
| cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); |
| } |
| |
| static int cp210x_startup(struct usb_serial *serial) |
| { |
| struct cp210x_port_private *port_priv; |
| int i; |
| |
| /* cp210x buffers behave strangely unless device is reset */ |
| usb_reset_device(serial->dev); |
| |
| for (i = 0; i < serial->num_ports; i++) { |
| port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); |
| if (!port_priv) |
| return -ENOMEM; |
| |
| memset(port_priv, 0x00, sizeof(*port_priv)); |
| port_priv->bInterfaceNumber = |
| serial->interface->cur_altsetting->desc.bInterfaceNumber; |
| |
| usb_set_serial_port_data(serial->port[i], port_priv); |
| } |
| |
| return 0; |
| } |
| |
| static void cp210x_release(struct usb_serial *serial) |
| { |
| struct cp210x_port_private *port_priv; |
| int i; |
| |
| for (i = 0; i < serial->num_ports; i++) { |
| port_priv = usb_get_serial_port_data(serial->port[i]); |
| kfree(port_priv); |
| usb_set_serial_port_data(serial->port[i], NULL); |
| } |
| } |
| |
| static int __init cp210x_init(void) |
| { |
| int retval; |
| |
| retval = usb_serial_register(&cp210x_device); |
| if (retval) |
| return retval; /* Failed to register */ |
| |
| retval = usb_register(&cp210x_driver); |
| if (retval) { |
| /* Failed to register */ |
| usb_serial_deregister(&cp210x_device); |
| return retval; |
| } |
| |
| /* Success */ |
| printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
| DRIVER_DESC "\n"); |
| return 0; |
| } |
| |
| static void __exit cp210x_exit(void) |
| { |
| usb_deregister(&cp210x_driver); |
| usb_serial_deregister(&cp210x_device); |
| } |
| |
| module_init(cp210x_init); |
| module_exit(cp210x_exit); |
| |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_VERSION(DRIVER_VERSION); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |
