/* * 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 #include #include #include #include #include #include #include #include #include /* * 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_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, 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(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); 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, .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; __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, 0, buf, size, 300); /* 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", __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; __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, 0, buf, size, 300); } else { result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), request, REQTYPE_HOST_TO_DEVICE, data[0], 0, NULL, 0, 300); } kfree(buf); if ((size > 2 && result != size) || result < 0) { dbg("%s - Unable to send request, " "request=0x%x size=%d result=%d", __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"); 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"); } 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"); } 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"); } 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) { /* cp210x buffers behave strangely unless device is reset */ usb_reset_device(serial->dev); return 0; } 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");