diff options
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 728 |
1 files changed, 728 insertions, 0 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c new file mode 100644 index 000000000..151c4bfe7 --- /dev/null +++ b/drivers/usb/serial/ftdi_sio.c @@ -0,0 +1,728 @@ +/* + * USB FTDI SIO driver + * + * (C) Copyright (C) 1999, 2000 + * Greg Kroah-Hartman (greg@kroah.com) + * Bill Ryder (bryder@sgi.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * See Documentation/usb/usb-serial.txt for more information on using this driver + * + * (04/04/2000) Bill Ryder + * Fixed bugs in TCGET/TCSET ioctls (by removing them - they are + * handled elsewhere in the serial driver chain). + * + * (03/30/2000) Bill Ryder + * Implemented lots of ioctls + * Fixed a race condition in write + * Changed some dbg's to errs + * + * (03/26/2000) gkh + * Split driver up into device specific pieces. + * + */ + +/* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */ +/* Thanx to FTDI for so kindly providing details of the protocol required */ +/* to talk to the device */ + + +#include <linux/config.h> + +#ifdef CONFIG_USB_SERIAL_FTDI_SIO + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/signal.h> +#include <linux/errno.h> +#include <linux/poll.h> +#include <linux/init.h> +#include <linux/malloc.h> +#include <linux/fcntl.h> +#include <linux/tty_driver.h> +#include <linux/tty_flip.h> +#include <linux/tty.h> +#include <linux/module.h> +#include <linux/spinlock.h> + +#ifdef CONFIG_USB_SERIAL_DEBUG + #define DEBUG +#else + #undef DEBUG +#endif +#include <linux/usb.h> + +#include "usb-serial.h" + +#include "ftdi_sio.h" + +#define FTDI_VENDOR_ID 0x0403 +#define FTDI_SIO_SERIAL_CONVERTER_ID 0x8372 + +/* function prototypes for a FTDI serial converter */ +static int ftdi_sio_startup (struct usb_serial *serial); +static int ftdi_sio_open (struct usb_serial_port *port, struct file *filp); +static void ftdi_sio_close (struct usb_serial_port *port, struct file *filp); +static int ftdi_sio_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count); +static void ftdi_sio_write_bulk_callback (struct urb *urb); +static void ftdi_sio_read_bulk_callback (struct urb *urb); +static void ftdi_sio_set_termios (struct usb_serial_port *port, struct termios * old); +static int ftdi_sio_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); + +/* All of the device info needed for the FTDI SIO serial converter */ +static __u16 ftdi_vendor_id = FTDI_VENDOR_ID; +static __u16 ftdi_sio_product_id = FTDI_SIO_SERIAL_CONVERTER_ID; +struct usb_serial_device_type ftdi_sio_device = { + name: "FTDI SIO", + idVendor: &ftdi_vendor_id, /* the FTDI vendor ID */ + idProduct: &ftdi_sio_product_id, /* the FTDI SIO product id */ + needs_interrupt_in: MUST_HAVE_NOT, /* this device must not have an interrupt in endpoint */ + needs_bulk_in: MUST_HAVE, /* this device must have a bulk in endpoint */ + needs_bulk_out: MUST_HAVE, /* this device must have a bulk out endpoint */ + num_interrupt_in: 0, + num_bulk_in: 1, + num_bulk_out: 1, + num_ports: 1, + open: ftdi_sio_open, + close: ftdi_sio_close, + write: ftdi_sio_write, + read_bulk_callback: ftdi_sio_read_bulk_callback, + write_bulk_callback: ftdi_sio_write_bulk_callback, + ioctl: ftdi_sio_ioctl, + set_termios: ftdi_sio_set_termios, + startup: ftdi_sio_startup, +}; + + +/* + * *************************************************************************** + * FTDI SIO Serial Converter specific driver functions + * *************************************************************************** + * + * Bill Ryder bryder@sgi.com of Silicon Graphics, Inc. did the FTDI_SIO code + * Thanx to FTDI for so kindly providing details of the protocol required + * to talk to the device - http://www.ftdi.co.uk + * + * Tested as at this version - other stuff might work + * 23 March 2000 + * Works: + * Baudrates - 9600, 38400,19200, 57600, 115200 + * TIOCMBIC - TIOCM_DTR / TIOCM_RTS + * TIOCMBIS - TIOCM_DTR / TIOCM_RTS + * TIOCMSET - DTR on/RTSon / DTR off, RTS off + * no parity:CS8 even parity:CS7 odd parity:CS7 + * CRTSCTS flow control + * + * Pilot-xfer zillions of times + * + * cu works with dir option + * + * Not Tested (ie might not work): + * xon/xoff flow control + * ppp (modem handling in general) + * + * KNOWN BUGS: + * Multiple Opens + * ============== + * Seems to have problem when opening an already open port, + * Get I/O error on first attempt, then it lets you in. + * Need to do proper usage counting - keep registered callbacks for first opener. + * + * Reproduce with: + * cu -l /dev/ttyUSB0 dir + * whilst cu is running do: + * stty -a < /dev/ttyUSB0 + * + * from stty get: 'bash: /dev/ttyUSB0: Invalid argument ' + * from cu get + * write: Invalid argument + * + * Initialisation Problem + * ====================== + * Pilot transfer required me to run the serial_loopback program before it would work. + * Still working on this. See the webpage http://reality.sgi.com/bryder_wellington/ftdi_sio + * + */ + +#define WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */ + +/* do some startup allocations not currently performed by usb_serial_probe() */ +static int ftdi_sio_startup (struct usb_serial *serial) +{ + init_waitqueue_head(&serial->write_wait); + + return (0); +} + +static int ftdi_sio_open (struct usb_serial_port *port, struct file *filp) +{ /* ftdi_sio_open */ + struct termios tmp_termios; + struct usb_serial *serial = port->serial; + char buf[1]; /* Needed for the usb_control_msg I think */ + + dbg("ftdi_sio_open port %d", port->number); + + /* FIXME - multiple concurrent opens cause trouble */ + if (port->active) { + err ("port already open"); + return -EINVAL; + } + port->active = 1; /* FIXME - For multiple open this should increment */ + + /* See ftdi_sio.h for description of what is reset */ + usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE, + FTDI_SIO_RESET_SIO, + 0, buf, 0, WDR_TIMEOUT); + + /* Setup termios */ + port->tty->termios->c_cflag = + B9600 | CS8 | CREAD | HUPCL | CLOCAL; + + + ftdi_sio_set_termios(port, &tmp_termios); + + /* Disable flow control */ + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_FLOW_CTRL_REQUEST, + FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, + 0, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("error from flowcontrol urb"); + return(-EINVAL); + } + + /* Turn on RTS and DTR since we are not flow controlling*/ + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + (unsigned)FTDI_SIO_SET_DTR_HIGH, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("Error from DTR HIGH urb"); + } + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + (unsigned)FTDI_SIO_SET_RTS_HIGH, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("Error from RTS HIGH urb"); + } + + /*Start reading from the device*/ + if (usb_submit_urb(port->read_urb)) + err("usb_submit_urb(read bulk) failed"); + + return (0); +} /* ftdi_sio_open */ + + +static void ftdi_sio_close (struct usb_serial_port *port, struct file *filp) +{ /* ftdi_sio_close */ + struct usb_serial *serial = port->serial; + unsigned int c_cflag = port->tty->termios->c_cflag; + char buf[1]; + + dbg("ftdi_sio_close port %d", port->number); + + if (c_cflag & HUPCL){ + /* Disable flow control */ + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_FLOW_CTRL_REQUEST, + FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, + 0, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("error from flowcontrol urb"); + } + + /* drop DTR */ + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + (unsigned)FTDI_SIO_SET_DTR_LOW, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("Error from DTR LOW urb"); + } + /* drop RTS */ + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + (unsigned)FTDI_SIO_SET_RTS_LOW, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("Error from RTS LOW urb"); + } + } + + /* shutdown our bulk reads and writes */ + usb_unlink_urb (port->write_urb); + usb_unlink_urb (port->read_urb); + port->active = 0; +} /* ftdi_sio_close */ + + + +/* The ftdi_sio requires the first byte to have: + * B0 1 + * B1 0 + * B2..7 length of message excluding byte 0 + */ +static int ftdi_sio_write (struct usb_serial_port *port, int from_user, + const unsigned char *buf, int count) +{ /* ftdi_sio_write */ + struct usb_serial *serial = port->serial; + const int data_offset = 1; + int rc; + DECLARE_WAITQUEUE(wait, current); + + dbg("ftdi_sio_serial_write port %d, %d bytes", port->number, count); + + if (count == 0) { + err("write request of 0 bytes"); + return 0; + } + + /* only do something if we have a bulk out endpoint */ + if (serial->num_bulk_out) { + unsigned char *first_byte = port->write_urb->transfer_buffer; + + /* Was seeing a race here, got a read callback, then write callback before + hitting interuptible_sleep_on - so wrapping in add_wait_queue stuff */ + + add_wait_queue(&serial->write_wait, &wait); + set_current_state (TASK_INTERRUPTIBLE); + while (port->write_urb->status == -EINPROGRESS) { + dbg("ftdi_sio - write in progress - retrying"); + if (0 /* file->f_flags & O_NONBLOCK */) { + rc = -EAGAIN; + goto err; + } + if (signal_pending(current)) { + current->state = TASK_RUNNING; + remove_wait_queue(&serial->write_wait, &wait); + rc = -ERESTARTSYS; + goto err; + } + schedule(); + } + remove_wait_queue(&serial->write_wait, &wait); + set_current_state(TASK_RUNNING); + + count += data_offset; + count = (count > port->bulk_out_size) ? port->bulk_out_size : count; + if (count == 0) { + return 0; + } + + /* Copy in the data to send */ + if (from_user) { + copy_from_user(port->write_urb->transfer_buffer + data_offset , + buf, count - data_offset ); + } + else { + memcpy(port->write_urb->transfer_buffer + data_offset, + buf, count - data_offset ); + } + + /* Write the control byte at the front of the packet*/ + first_byte = port->write_urb->transfer_buffer; + *first_byte = 1 | ((count-data_offset) << 2) ; + +#ifdef CONFIG_USB_SERIAL_DEBUG + dbg("Bytes: %d, Control Byte: 0o%03o",count, first_byte[0]); + + if (count) { + int i; + printk (KERN_DEBUG __FILE__ ": data written - length = %d, data = ", count); + for (i = 0; i < count; ++i) { + printk ( "0x%02x ", first_byte[i]); + if (first_byte[i] > ' ' && first_byte[i] < '~') { + printk( "%c ", first_byte[i]); + } else { + printk( " "); + } + } + + + printk ( "\n"); + } + +#endif + /* send the data out the bulk port */ + port->write_urb->transfer_buffer_length = count; + + if (usb_submit_urb(port->write_urb)) + err("usb_submit_urb(write bulk) failed"); + + dbg("write returning: %d", count - data_offset); + return (count - data_offset); + } + + /* no bulk out, so return 0 bytes written */ + return 0; + err: /* error exit */ + return(rc); +} /* ftdi_sio_write */ + +static void ftdi_sio_write_bulk_callback (struct urb *urb) +{ + struct usb_serial_port *port = (struct usb_serial_port *)urb->context; + struct usb_serial *serial; + struct tty_struct *tty = port->tty; + + dbg("ftdi_sio_write_bulk_callback"); + + if (port_paranoia_check (port, "ftdi_sio_write_bulk_callback")) { + return; + } + + serial = port->serial; + if (serial_paranoia_check (serial, "ftdi_sio_write_bulk_callback")) { + return; + } + + if (urb->status) { + dbg("nonzero write bulk status received: %d", urb->status); + return; + } + + wake_up_interruptible(&serial->write_wait); + if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) + (tty->ldisc.write_wakeup)(tty); + + wake_up_interruptible(&tty->write_wait); + + return; +} /* ftdi_sio_write_bulk_callback */ + +static void ftdi_sio_read_bulk_callback (struct urb *urb) +{ /* ftdi_sio_serial_buld_callback */ + struct usb_serial_port *port = (struct usb_serial_port *)urb->context; + struct usb_serial *serial; + struct tty_struct *tty = port->tty ; + unsigned char *data = urb->transfer_buffer; + + const int data_offset = 2; + int i; + + dbg("ftdi_sio read callback"); + + if (port_paranoia_check (port, "ftdi_sio_read_bulk_callback")) { + return; + } + + serial = port->serial; + if (serial_paranoia_check (serial, "ftdi_sio_read_bulk_callback")) { + return; + } + + /* TO DO -- check for hung up line and handle appropriately: */ + /* send hangup (need to find out how to do this) */ + + + if (urb->status) { + /* This will happen at close every time so it is a dbg not an err */ + dbg("nonzero read bulk status received: %d", urb->status); + return; + } + +#ifdef CONFIG_USB_SERIAL_DEBUG + if (urb->actual_length > 2) { + printk (KERN_DEBUG __FILE__ ": data read - length = %d, data = ", urb->actual_length); + for (i = 0; i < urb->actual_length; ++i) { + printk ( "0x%.2x ", data[i]); + if (data[i] > ' ' && data[i] < '~') { + printk( "%c ", data[i]); + } else { + printk( " "); + } + } + printk ( "\n"); + } else { + dbg("Just status"); + } +#endif + + + if (urb->actual_length > data_offset) { + for (i = data_offset ; i < urb->actual_length ; ++i) { + tty_insert_flip_char(tty, data[i], 0); + } + tty_flip_buffer_push(tty); + } + + /* Continue trying to always read */ + if (usb_submit_urb(urb)) + err("failed resubmitting read urb"); + + return; +} /* ftdi_sio_serial_read_bulk_callback */ + +/* As I understand this - old_termios contains the original termios settings */ +/* and tty->termios contains the new setting to be used */ +/* */ +/* WARNING: set_termios calls this with old_termios in kernel space */ + +static void ftdi_sio_set_termios (struct usb_serial_port *port, struct termios *old_termios) +{ /* ftdi_sio_set_termios */ + struct usb_serial *serial = port->serial; + unsigned int cflag = port->tty->termios->c_cflag; + __u16 urb_value; /* Will hold the new flags */ + char buf[1]; /* Perhaps I should dynamically alloc this? */ + + dbg("ftdi_sio_set_termios port %d", port->number); + + + /* FIXME -For this cut I don't care if the line is really changing or + not - so just do the change regardless - should be able to + compare old_termios and tty->termios */ + /* NOTE These routines can get interrupted by + ftdi_sio_read_bulk_callback - need to examine what this + means - don't see any problems yet */ + + /* Set number of data bits, parity, stop bits */ + + urb_value = 0; + urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : + FTDI_SIO_SET_DATA_STOP_BITS_1); + urb_value |= (cflag & PARENB ? + (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD : + FTDI_SIO_SET_DATA_PARITY_EVEN) : + FTDI_SIO_SET_DATA_PARITY_NONE); + if (cflag & CSIZE) { + switch (cflag & CSIZE) { + case CS5: urb_value |= 5; dbg("Setting CS5"); break; + case CS6: urb_value |= 6; dbg("Setting CS6"); break; + case CS7: urb_value |= 7; dbg("Setting CS7"); break; + case CS8: urb_value |= 8; dbg("Setting CS8"); break; + default: + err("CSIZE was set but not CS5-CS8"); + } + } + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_DATA_REQUEST, + FTDI_SIO_SET_DATA_REQUEST_TYPE, + urb_value , 0, + buf, 0, 100) < 0) { + err("FAILED to set databits/stopbits/parity"); + } + + /* Now do the baudrate */ + + switch(cflag & CBAUD){ + case B0: break; /* Handled below */ + case B300: urb_value = ftdi_sio_b300; dbg("Set to 300"); break; + case B600: urb_value = ftdi_sio_b600; dbg("Set to 600") ; break; + case B1200: urb_value = ftdi_sio_b1200; dbg("Set to 1200") ; break; + case B2400: urb_value = ftdi_sio_b2400; dbg("Set to 2400") ; break; + case B4800: urb_value = ftdi_sio_b4800; dbg("Set to 4800") ; break; + case B9600: urb_value = ftdi_sio_b9600; dbg("Set to 9600") ; break; + case B19200: urb_value = ftdi_sio_b19200; dbg("Set to 19200") ; break; + case B38400: urb_value = ftdi_sio_b38400; dbg("Set to 38400") ; break; + case B57600: urb_value = ftdi_sio_b57600; dbg("Set to 57600") ; break; + case B115200: urb_value = ftdi_sio_b115200; dbg("Set to 115200") ; break; + default: dbg("FTDI_SIO does not support the baudrate requested"); + /* FIXME - how to return an error for this? */ break; + } + if ((cflag & CBAUD) == B0 ) { + /* Disable flow control */ + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_FLOW_CTRL_REQUEST, + FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, + 0, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("error from disable flowcontrol urb"); + } + /* Drop RTS and DTR */ + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + (unsigned)FTDI_SIO_SET_DTR_LOW, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("Error from DTR LOW urb"); + } + if (usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + (unsigned)FTDI_SIO_SET_RTS_LOW, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("Error from RTS LOW urb"); + } + + } else { + if (usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_BAUDRATE_REQUEST, + FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, + urb_value, 0, + buf, 0, 100) < 0) { + err("urb failed to set baurdrate"); + } + } + /* Set flow control */ + /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ + if (cflag & CRTSCTS) { + dbg("Setting to CRTSCTS flow control"); + if (usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_FLOW_CTRL_REQUEST, + FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, + 0 , FTDI_SIO_RTS_CTS_HS, + buf, 0, WDR_TIMEOUT) < 0) { + err("urb failed to set to rts/cts flow control"); + } + + } else { + /* CHECK Assuming XON/XOFF handled by stack - not by device */ + /* Disable flow control */ + dbg("Turning off hardware flow control"); + if (usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_FLOW_CTRL_REQUEST, + FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, + 0, 0, + buf, 0, WDR_TIMEOUT) < 0) { + err("urb failed to clear flow control"); + } + + } + return; +} /* ftdi_sio_set_termios */ + +static int ftdi_sio_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) +{ + struct usb_serial *serial = port->serial; + __u16 urb_value=0; /* Will hold the new flags */ + char buf[1]; + int ret, mask; + + dbg("ftdi_sio_ioctl - cmd 0x%04x", cmd); + + /* Based on code from acm.c and others */ + switch (cmd) { + + case TIOCMGET: + dbg("TIOCMGET"); + /* Request the status from the device */ + if ((ret = usb_control_msg(serial->dev, + usb_rcvctrlpipe(serial->dev, 0), + FTDI_SIO_GET_MODEM_STATUS_REQUEST, + FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, + 0, 0, + buf, 1, HZ * 5)) < 0 ) { + dbg("Get not get modem status of device"); + return(ret); + } + + return put_user((buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) | + (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) | + (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) | + (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0), + (unsigned long *) arg); + break; + + case TIOCMSET: /* Turns on and off the lines as specified by the mask */ + dbg("TIOCMSET"); + if ((ret = get_user(mask, (unsigned long *) arg))) return ret; + urb_value = ((mask & TIOCM_DTR) ? FTDI_SIO_SET_DTR_HIGH : FTDI_SIO_SET_DTR_LOW); + if ((ret = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + urb_value , 0, + buf, 0, WDR_TIMEOUT)) < 0){ + err("Urb to set DTR failed"); + return(ret); + } + urb_value = ((mask & TIOCM_RTS) ? FTDI_SIO_SET_RTS_HIGH : FTDI_SIO_SET_RTS_LOW); + if ((ret = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + urb_value , 0, + buf, 0, WDR_TIMEOUT)) < 0){ + err("Urb to set RTS failed"); + return(ret); + } + break; + + case TIOCMBIS: /* turns on (Sets) the lines as specified by the mask */ + dbg("TIOCMBIS"); + if ((ret = get_user(mask, (unsigned long *) arg))) return ret; + if (mask & TIOCM_DTR){ + if ((ret = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + FTDI_SIO_SET_DTR_HIGH , 0, + buf, 0, WDR_TIMEOUT)) < 0){ + err("Urb to set DTR failed"); + return(ret); + } + } + if (mask & TIOCM_RTS) { + if ((ret = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + FTDI_SIO_SET_RTS_HIGH , 0, + buf, 0, WDR_TIMEOUT)) < 0){ + err("Urb to set RTS failed"); + return(ret); + } + } + break; + + case TIOCMBIC: /* turns off (Clears) the lines as specified by the mask */ + dbg("TIOCMBIC"); + if ((ret = get_user(mask, (unsigned long *) arg))) return ret; + if (mask & TIOCM_DTR){ + if ((ret = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + FTDI_SIO_SET_DTR_LOW , 0, + buf, 0, WDR_TIMEOUT)) < 0){ + err("Urb to unset DTR failed"); + return(ret); + } + } + if (mask & TIOCM_RTS) { + if ((ret = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + FTDI_SIO_SET_MODEM_CTRL_REQUEST, + FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, + FTDI_SIO_SET_RTS_LOW , 0, + buf, 0, WDR_TIMEOUT)) < 0){ + err("Urb to unset RTS failed"); + return(ret); + } + } + break; + + /* + * I had originally implemented TCSET{A,S}{,F,W} and + * TCGET{A,S} here separately, however when testing I + * found that the higher layers actually do the termios + * conversions themselves and pass the call onto + * ftdi_sio_set_termios. + * + */ + + default: + /* This is not an error - turns out the higher layers will do + * some ioctls itself (see comment above) + */ + dbg("ftdi_sio ioctl arg not supported - it was 0x%04x",cmd); + return(-ENOIOCTLCMD); + break; + } + dbg("ftdi_sio_ioctl returning 0"); + return 0; +} /* ftdi_sio_ioctl */ + +#endif /* CONFIG_USB_SERIAL_FTDI_SIO */ + + |