diff options
Diffstat (limited to 'kernel/drivers/usb/serial/cp210x.c')
| -rw-r--r-- | kernel/drivers/usb/serial/cp210x.c | 893 |
1 files changed, 893 insertions, 0 deletions
diff --git a/kernel/drivers/usb/serial/cp210x.c b/kernel/drivers/usb/serial/cp210x.c new file mode 100644 index 000000000..ffd739e31 --- /dev/null +++ b/kernel/drivers/usb/serial/cp210x.c @@ -0,0 +1,893 @@ +/* + * Silicon Laboratories CP210x USB to RS232 serial adaptor driver + * + * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation. + * + * Support to set flow control line levels using TIOCMGET and TIOCMSET + * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow + * control thanks to Munir Nassar nassarmu@real-time.com + * + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/usb.h> +#include <linux/uaccess.h> +#include <linux/usb/serial.h> + +#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" + +/* + * Function Prototypes + */ +static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); +static void cp210x_close(struct usb_serial_port *); +static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *); +static void cp210x_get_termios_port(struct usb_serial_port *port, + unsigned int *cflagp, unsigned int *baudp); +static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, + struct ktermios *); +static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, + struct ktermios*); +static 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 const struct usb_device_id id_table[] = { + { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ + { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ + { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ + { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ + { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ + { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */ + { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ + { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ + { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */ + { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ + { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ + { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ + { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ + { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ + { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */ + { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ + { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ + { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ + { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ + { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ + { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ + { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ + { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ + { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ + { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ + { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ + { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ + { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ + { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ + { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ + { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */ + { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ + { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ + { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ + { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ + { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ + { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ + { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ + { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ + { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */ + { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ + { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ + { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */ + { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ + { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ + { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ + { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ + { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ + { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ + { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ + { USB_DEVICE(0x10C4, 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, 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, 0x85F8) }, /* Virtenio Preon32 */ + { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ + { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ + { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ + { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ + { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ + { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ + { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ + { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ + { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ + { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ + { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ + { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ + { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ + { USB_DEVICE(0x10C4, 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, 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(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(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ + { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ + { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ + { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ + { } /* Terminating Entry */ +}; + +MODULE_DEVICE_TABLE(usb, id_table); + +struct cp210x_serial_private { + __u8 bInterfaceNumber; +}; + +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, + .tiocmget = cp210x_tiocmget, + .tiocmset = cp210x_tiocmset, + .attach = cp210x_startup, + .release = cp210x_release, + .dtr_rts = cp210x_dtr_rts +}; + +static struct usb_serial_driver * const serial_drivers[] = { + &cp210x_device, NULL +}; + +/* Config request types */ +#define REQTYPE_HOST_TO_INTERFACE 0x41 +#define REQTYPE_INTERFACE_TO_HOST 0xc1 +#define REQTYPE_HOST_TO_DEVICE 0x40 +#define REQTYPE_DEVICE_TO_HOST 0xc0 + +/* Config request codes */ +#define CP210X_IFC_ENABLE 0x00 +#define CP210X_SET_BAUDDIV 0x01 +#define CP210X_GET_BAUDDIV 0x02 +#define CP210X_SET_LINE_CTL 0x03 +#define CP210X_GET_LINE_CTL 0x04 +#define CP210X_SET_BREAK 0x05 +#define CP210X_IMM_CHAR 0x06 +#define CP210X_SET_MHS 0x07 +#define CP210X_GET_MDMSTS 0x08 +#define CP210X_SET_XON 0x09 +#define CP210X_SET_XOFF 0x0A +#define CP210X_SET_EVENTMASK 0x0B +#define CP210X_GET_EVENTMASK 0x0C +#define CP210X_SET_CHAR 0x0D +#define CP210X_GET_CHARS 0x0E +#define CP210X_GET_PROPS 0x0F +#define CP210X_GET_COMM_STATUS 0x10 +#define CP210X_RESET 0x11 +#define CP210X_PURGE 0x12 +#define CP210X_SET_FLOW 0x13 +#define CP210X_GET_FLOW 0x14 +#define CP210X_EMBED_EVENTS 0x15 +#define CP210X_GET_EVENTSTATE 0x16 +#define CP210X_SET_CHARS 0x19 +#define CP210X_GET_BAUDRATE 0x1D +#define CP210X_SET_BAUDRATE 0x1E + +/* CP210X_IFC_ENABLE */ +#define UART_ENABLE 0x0001 +#define UART_DISABLE 0x0000 + +/* CP210X_(SET|GET)_BAUDDIV */ +#define BAUD_RATE_GEN_FREQ 0x384000 + +/* CP210X_(SET|GET)_LINE_CTL */ +#define BITS_DATA_MASK 0X0f00 +#define BITS_DATA_5 0X0500 +#define BITS_DATA_6 0X0600 +#define BITS_DATA_7 0X0700 +#define BITS_DATA_8 0X0800 +#define BITS_DATA_9 0X0900 + +#define BITS_PARITY_MASK 0x00f0 +#define BITS_PARITY_NONE 0x0000 +#define BITS_PARITY_ODD 0x0010 +#define BITS_PARITY_EVEN 0x0020 +#define BITS_PARITY_MARK 0x0030 +#define BITS_PARITY_SPACE 0x0040 + +#define BITS_STOP_MASK 0x000f +#define BITS_STOP_1 0x0000 +#define BITS_STOP_1_5 0x0001 +#define BITS_STOP_2 0x0002 + +/* CP210X_SET_BREAK */ +#define BREAK_ON 0x0001 +#define BREAK_OFF 0x0000 + +/* CP210X_(SET_MHS|GET_MDMSTS) */ +#define CONTROL_DTR 0x0001 +#define CONTROL_RTS 0x0002 +#define CONTROL_CTS 0x0010 +#define CONTROL_DSR 0x0020 +#define CONTROL_RING 0x0040 +#define CONTROL_DCD 0x0080 +#define CONTROL_WRITE_DTR 0x0100 +#define CONTROL_WRITE_RTS 0x0200 + +/* + * cp210x_get_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_serial_private *spriv = usb_get_serial_data(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) + return -ENOMEM; + + /* Issue the request, attempting to read 'size' bytes */ + result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), + request, REQTYPE_INTERFACE_TO_HOST, 0x0000, + spriv->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) { + dev_dbg(&port->dev, "%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_serial_private *spriv = usb_get_serial_data(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) + 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_INTERFACE, 0x0000, + spriv->bInterfaceNumber, buf, size, + USB_CTRL_SET_TIMEOUT); + } else { + result = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + request, REQTYPE_HOST_TO_INTERFACE, data[0], + spriv->bInterfaceNumber, NULL, 0, + USB_CTRL_SET_TIMEOUT); + } + + kfree(buf); + + if ((size > 2 && result != size) || result < 0) { + dev_dbg(&port->dev, "%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; + + 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) +{ + usb_serial_generic_close(port); + cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); +} + +/* + * cp210x_get_termios + * Reads the baud rate, data bits, parity, stop bits and flow control mode + * from the device, corrects any unsupported values, and configures the + * termios structure to reflect the state of the device + */ +static void cp210x_get_termios(struct tty_struct *tty, + struct usb_serial_port *port) +{ + unsigned int baud; + + if (tty) { + cp210x_get_termios_port(tty->driver_data, + &tty->termios.c_cflag, &baud); + tty_encode_baud_rate(tty, baud, baud); + } else { + unsigned int cflag; + cflag = 0; + cp210x_get_termios_port(port, &cflag, &baud); + } +} + +/* + * cp210x_get_termios_port + * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. + */ +static void cp210x_get_termios_port(struct usb_serial_port *port, + unsigned int *cflagp, unsigned int *baudp) +{ + struct device *dev = &port->dev; + unsigned int cflag, modem_ctl[4]; + unsigned int baud; + unsigned int bits; + + cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); + + dev_dbg(dev, "%s - baud rate = %d\n", __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: + 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_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); + 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_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); + 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_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); + 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_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); + 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_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) { + dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); + cflag |= CRTSCTS; + } else { + dev_dbg(dev, "%s - flow control = NONE\n", __func__); + cflag &= ~CRTSCTS; + } + + *cflagp = cflag; +} + +/* + * CP2101 supports the following baud rates: + * + * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, + * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 + * + * CP2102 and CP2103 support the following additional rates: + * + * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, + * 576000 + * + * The device will map a requested rate to a supported one, but the result + * of requests for rates greater than 1053257 is undefined (see AN205). + * + * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, + * respectively, with an error less than 1%. The actual rates are determined + * by + * + * div = round(freq / (2 x prescale x request)) + * actual = freq / (2 x prescale x div) + * + * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps + * or 1 otherwise. + * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 + * otherwise. + */ +static void cp210x_change_speed(struct tty_struct *tty, + struct usb_serial_port *port, struct ktermios *old_termios) +{ + u32 baud; + + baud = tty->termios.c_ospeed; + + /* This maps the requested rate to a rate valid on cp2102 or cp2103, + * or to an arbitrary rate in [1M,2M]. + * + * NOTE: B0 is not implemented. + */ + baud = cp210x_quantise_baudrate(baud); + + dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); + if (cp210x_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) +{ + 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, CP210X_GET_LINE_CTL, &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: + dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n"); + bits |= BITS_DATA_8; + break; + } + if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) + 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_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; + 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_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) + dev_dbg(dev, "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; + 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_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) + dev_dbg(dev, "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); + dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", + __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; + dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); + } else { + modem_ctl[0] &= ~0x7B; + modem_ctl[0] |= 0x01; + modem_ctl[1] |= 0x40; + dev_dbg(dev, "%s - flow control = NONE\n", __func__); + } + + dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", + __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; + + 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_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; + + 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); + + 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; + unsigned int 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_set_config(port, CP210X_SET_BREAK, &state, 2); +} + +static int cp210x_startup(struct usb_serial *serial) +{ + struct usb_host_interface *cur_altsetting; + struct cp210x_serial_private *spriv; + + spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); + if (!spriv) + return -ENOMEM; + + cur_altsetting = serial->interface->cur_altsetting; + spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber; + + usb_set_serial_data(serial, spriv); + + return 0; +} + +static void cp210x_release(struct usb_serial *serial) +{ + struct cp210x_serial_private *spriv; + + spriv = usb_get_serial_data(serial); + kfree(spriv); +} + +module_usb_serial_driver(serial_drivers, id_table); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |