diff options
Diffstat (limited to 'drivers/usb/serial/cp2101.c')
| -rw-r--r-- | drivers/usb/serial/cp2101.c | 788 |
1 files changed, 0 insertions, 788 deletions
diff --git a/drivers/usb/serial/cp2101.c b/drivers/usb/serial/cp2101.c deleted file mode 100644 index 2f23d06..0000000 --- a/drivers/usb/serial/cp2101.c +++ /dev/null @@ -1,788 +0,0 @@ -/* - * Silicon Laboratories CP2101/CP2102 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 "v0.08" -#define DRIVER_DESC "Silicon Labs CP2101/CP2102 RS232 serial adaptor driver" - -/* - * Function Prototypes - */ -static int cp2101_open(struct tty_struct *, struct usb_serial_port *, - struct file *); -static void cp2101_cleanup(struct usb_serial_port *); -static void cp2101_close(struct tty_struct *, struct usb_serial_port *, - struct file*); -static void cp2101_get_termios(struct tty_struct *); -static void cp2101_set_termios(struct tty_struct *, struct usb_serial_port *, - struct ktermios*); -static int cp2101_tiocmget(struct tty_struct *, struct file *); -static int cp2101_tiocmset(struct tty_struct *, struct file *, - unsigned int, unsigned int); -static void cp2101_break_ctl(struct tty_struct *, int); -static int cp2101_startup(struct usb_serial *); -static void cp2101_shutdown(struct usb_serial *); - - -static int debug; - -static struct usb_device_id id_table [] = { - { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ - { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ - { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ - { 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, 0x800A) }, /* SPORTident BSM7-D-USB main station */ - { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ - { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ - { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ - { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ - { 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, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ - { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ - { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ - { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ - { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ - { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ - { 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, 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 demostration module */ - { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */ - { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ - { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ - { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ - { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ - { 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(0x13AD, 0x9999) }, /* Baltech card reader */ - { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ - { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ - { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ - { } /* Terminating Entry */ -}; - -MODULE_DEVICE_TABLE(usb, id_table); - -static struct usb_driver cp2101_driver = { - .name = "cp2101", - .probe = usb_serial_probe, - .disconnect = usb_serial_disconnect, - .id_table = id_table, - .no_dynamic_id = 1, -}; - -static struct usb_serial_driver cp2101_device = { - .driver = { - .owner = THIS_MODULE, - .name = "cp2101", - }, - .usb_driver = &cp2101_driver, - .id_table = id_table, - .num_ports = 1, - .open = cp2101_open, - .close = cp2101_close, - .break_ctl = cp2101_break_ctl, - .set_termios = cp2101_set_termios, - .tiocmget = cp2101_tiocmget, - .tiocmset = cp2101_tiocmset, - .attach = cp2101_startup, - .shutdown = cp2101_shutdown, -}; - -/* Config request types */ -#define REQTYPE_HOST_TO_DEVICE 0x41 -#define REQTYPE_DEVICE_TO_HOST 0xc1 - -/* Config SET requests. To GET, add 1 to the request number */ -#define CP2101_UART 0x00 /* Enable / Disable */ -#define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ -#define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ -#define CP2101_BREAK 0x05 /* On / Off */ -#define CP2101_CONTROL 0x07 /* Flow control line states */ -#define CP2101_MODEMCTL 0x13 /* Modem controls */ -#define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ - -/* CP2101_UART */ -#define UART_ENABLE 0x0001 -#define UART_DISABLE 0x0000 - -/* CP2101_BAUDRATE */ -#define BAUD_RATE_GEN_FREQ 0x384000 - -/* CP2101_BITS */ -#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 - -/* CP2101_BREAK */ -#define BREAK_ON 0x0000 -#define BREAK_OFF 0x0001 - -/* CP2101_CONTROL */ -#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 - -/* - * cp2101_get_config - * Reads from the CP2101 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 cp2101_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; - } - - /* For get requests, the request number must be incremented */ - request++; - - /* 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\n", - __func__, request, size, result); - return -EPROTO; - } - - return 0; -} - -/* - * cp2101_set_config - * Writes to the CP2101 configuration registers - * Values less than 16 bits wide are sent directly - * 'size' is specified in bytes. - */ -static int cp2101_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\n", - __func__, request, size, result); - return -EPROTO; - } - - /* Single data value */ - result = usb_control_msg(serial->dev, - usb_sndctrlpipe(serial->dev, 0), - request, REQTYPE_HOST_TO_DEVICE, data[0], - 0, NULL, 0, 300); - return 0; -} - -/* - * cp2101_set_config_single - * Convenience function for calling cp2101_set_config on single data values - * without requiring an integer pointer - */ -static inline int cp2101_set_config_single(struct usb_serial_port *port, - u8 request, unsigned int data) -{ - return cp2101_set_config(port, request, &data, 2); -} - -/* - * cp2101_quantise_baudrate - * Quantises the baud rate as per AN205 Table 1 - */ -static unsigned int cp2101_quantise_baudrate(unsigned int baud) { - if (baud <= 56) baud = 0; - else 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 <= 1053257) baud = 921600; - else if (baud <= 1474560) baud = 1228800; - else if (baud <= 2457600) baud = 1843200; - else baud = 3686400; - return baud; -} - -static int cp2101_open(struct tty_struct *tty, struct usb_serial_port *port, - struct file *filp) -{ - struct usb_serial *serial = port->serial; - int result; - - dbg("%s - port %d", __func__, port->number); - - if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { - dev_err(&port->dev, "%s - Unable to enable UART\n", - __func__); - return -EPROTO; - } - - /* Start reading from the device */ - usb_fill_bulk_urb(port->read_urb, serial->dev, - usb_rcvbulkpipe(serial->dev, - port->bulk_in_endpointAddress), - port->read_urb->transfer_buffer, - port->read_urb->transfer_buffer_length, - serial->type->read_bulk_callback, - port); - result = usb_submit_urb(port->read_urb, GFP_KERNEL); - if (result) { - dev_err(&port->dev, "%s - failed resubmitting read urb, " - "error %d\n", __func__, result); - return result; - } - - /* Configure the termios structure */ - cp2101_get_termios(tty); - - /* Set the DTR and RTS pins low */ - cp2101_tiocmset(tty, NULL, TIOCM_DTR | TIOCM_RTS, 0); - - return 0; -} - -static void cp2101_cleanup(struct usb_serial_port *port) -{ - struct usb_serial *serial = port->serial; - - dbg("%s - port %d", __func__, port->number); - - if (serial->dev) { - /* shutdown any bulk reads that might be going on */ - if (serial->num_bulk_out) - usb_kill_urb(port->write_urb); - if (serial->num_bulk_in) - usb_kill_urb(port->read_urb); - } -} - -static void cp2101_close(struct tty_struct *tty, struct usb_serial_port *port, - struct file *filp) -{ - dbg("%s - port %d", __func__, port->number); - - /* shutdown our urbs */ - dbg("%s - shutting down urbs", __func__); - usb_kill_urb(port->write_urb); - usb_kill_urb(port->read_urb); - - mutex_lock(&port->serial->disc_mutex); - if (!port->serial->disconnected) - cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); - mutex_unlock(&port->serial->disc_mutex); -} - -/* - * cp2101_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 cp2101_get_termios (struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - unsigned int cflag, modem_ctl[4]; - unsigned int baud; - unsigned int bits; - - dbg("%s - port %d", __func__, port->number); - - cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); - /* Convert to baudrate */ - if (baud) - baud = cp2101_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); - - dbg("%s - baud rate = %d", __func__, baud); - - tty_encode_baud_rate(tty, baud, baud); - cflag = tty->termios->c_cflag; - - cp2101_get_config(port, CP2101_BITS, &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; - cp2101_set_config(port, CP2101_BITS, &bits, 2); - break; - default: - dbg("%s - Unknown number of data bits, using 8", __func__); - cflag |= CS8; - bits &= ~BITS_DATA_MASK; - bits |= BITS_DATA_8; - cp2101_set_config(port, CP2101_BITS, &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 (not supported, disabling parity)", - __func__); - cflag &= ~PARENB; - bits &= ~BITS_PARITY_MASK; - cp2101_set_config(port, CP2101_BITS, &bits, 2); - break; - case BITS_PARITY_SPACE: - dbg("%s - parity = SPACE (not supported, disabling parity)", - __func__); - cflag &= ~PARENB; - bits &= ~BITS_PARITY_MASK; - cp2101_set_config(port, CP2101_BITS, &bits, 2); - break; - default: - dbg("%s - Unknown parity mode, disabling parity", __func__); - cflag &= ~PARENB; - bits &= ~BITS_PARITY_MASK; - cp2101_set_config(port, CP2101_BITS, &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; - cp2101_set_config(port, CP2101_BITS, &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; - cp2101_set_config(port, CP2101_BITS, &bits, 2); - break; - } - - cp2101_get_config(port, CP2101_MODEMCTL, 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; - } - - tty->termios->c_cflag = cflag; -} - -static void cp2101_set_termios(struct tty_struct *tty, - struct usb_serial_port *port, struct ktermios *old_termios) -{ - unsigned int cflag, old_cflag; - unsigned int baud = 0, bits; - unsigned int modem_ctl[4]; - - dbg("%s - port %d", __func__, port->number); - - if (!tty) - return; - - tty->termios->c_cflag &= ~CMSPAR; - cflag = tty->termios->c_cflag; - old_cflag = old_termios->c_cflag; - baud = cp2101_quantise_baudrate(tty_get_baud_rate(tty)); - - /* If the baud rate is to be updated*/ - if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { - dbg("%s - Setting baud rate to %d baud", __func__, - baud); - if (cp2101_set_config_single(port, CP2101_BAUDRATE, - ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { - dbg("Baud rate requested not supported by device\n"); - baud = tty_termios_baud_rate(old_termios); - } - } - /* Report back the resulting baud rate */ - tty_encode_baud_rate(tty, baud, baud); - - /* If the number of data bits is to be updated */ - if ((cflag & CSIZE) != (old_cflag & CSIZE)) { - cp2101_get_config(port, CP2101_BITS, &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("cp2101 driver does not " - "support the number of bits requested," - " using 8 bit mode\n"); - bits |= BITS_DATA_8; - break; - } - if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) - dbg("Number of data bits requested " - "not supported by device\n"); - } - - if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { - cp2101_get_config(port, CP2101_BITS, &bits, 2); - bits &= ~BITS_PARITY_MASK; - if (cflag & PARENB) { - if (cflag & PARODD) { - bits |= BITS_PARITY_ODD; - dbg("%s - parity = ODD", __func__); - } else { - bits |= BITS_PARITY_EVEN; - dbg("%s - parity = EVEN", __func__); - } - } - if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) - dbg("Parity mode not supported " - "by device\n"); - } - - if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { - cp2101_get_config(port, CP2101_BITS, &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 (cp2101_set_config(port, CP2101_BITS, &bits, 2)) - dbg("Number of stop bits requested " - "not supported by device\n"); - } - - if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { - cp2101_get_config(port, CP2101_MODEMCTL, 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]); - cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); - } - -} - -static int cp2101_tiocmset (struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear) -{ - struct usb_serial_port *port = tty->driver_data; - 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 cp2101_set_config(port, CP2101_CONTROL, &control, 2); - -} - -static int cp2101_tiocmget (struct tty_struct *tty, struct file *file) -{ - struct usb_serial_port *port = tty->driver_data; - unsigned int control; - int result; - - dbg("%s - port %d", __func__, port->number); - - cp2101_get_config(port, CP2101_CONTROL, &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 cp2101_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"); - cp2101_set_config(port, CP2101_BREAK, &state, 2); -} - -static int cp2101_startup(struct usb_serial *serial) -{ - /* CP2101 buffers behave strangely unless device is reset */ - usb_reset_device(serial->dev); - return 0; -} - -static void cp2101_shutdown(struct usb_serial *serial) -{ - int i; - - dbg("%s", __func__); - - /* Stop reads and writes on all ports */ - for (i = 0; i < serial->num_ports; ++i) - cp2101_cleanup(serial->port[i]); -} - -static int __init cp2101_init(void) -{ - int retval; - - retval = usb_serial_register(&cp2101_device); - if (retval) - return retval; /* Failed to register */ - - retval = usb_register(&cp2101_driver); - if (retval) { - /* Failed to register */ - usb_serial_deregister(&cp2101_device); - return retval; - } - - /* Success */ - printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" - DRIVER_DESC "\n"); - return 0; -} - -static void __exit cp2101_exit(void) -{ - usb_deregister(&cp2101_driver); - usb_serial_deregister(&cp2101_device); -} - -module_init(cp2101_init); -module_exit(cp2101_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"); |
