mirror of https://gitee.com/openkylin/linux.git
USB: ftd_sio: cleanups and updates for new termios work
- Remove can't happen tests - Rework speed validation in terms of baud rates not CBAUD bits - Report speed set (or chosen) - Minor termios correctness Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox
Greg Kroah-Hartman
parent
9ab0f202e6
commit
669a6db103
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@ -294,7 +294,7 @@ struct ftdi_private {
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__u16 interface; /* FT2232C port interface (0 for FT232/245) */
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int force_baud; /* if non-zero, force the baud rate to this value */
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speed_t force_baud; /* if non-zero, force the baud rate to this value */
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int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
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spinlock_t tx_lock; /* spinlock for transmit state */
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@ -878,6 +878,7 @@ static __u32 get_ftdi_divisor(struct usb_serial_port * port)
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if (div_value == 0) {
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dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
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div_value = ftdi_sio_b9600;
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baud = 9600;
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div_okay = 0;
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}
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break;
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@ -886,6 +887,7 @@ static __u32 get_ftdi_divisor(struct usb_serial_port * port)
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div_value = ftdi_232am_baud_to_divisor(baud);
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} else {
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dbg("%s - Baud rate too high!", __FUNCTION__);
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baud = 9600;
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div_value = ftdi_232am_baud_to_divisor(9600);
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div_okay = 0;
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}
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@ -899,6 +901,7 @@ static __u32 get_ftdi_divisor(struct usb_serial_port * port)
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dbg("%s - Baud rate too high!", __FUNCTION__);
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div_value = ftdi_232bm_baud_to_divisor(9600);
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div_okay = 0;
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baud = 9600;
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}
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break;
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} /* priv->chip_type */
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@ -909,6 +912,7 @@ static __u32 get_ftdi_divisor(struct usb_serial_port * port)
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ftdi_chip_name[priv->chip_type]);
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}
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tty_encode_baud_rate(port->tty, baud, baud);
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return(div_value);
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}
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@ -1263,7 +1267,7 @@ static void ftdi_USB_UIRT_setup (struct ftdi_private *priv)
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priv->flags |= ASYNC_SPD_CUST;
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priv->custom_divisor = 77;
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priv->force_baud = B38400;
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priv->force_baud = 38400;
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} /* ftdi_USB_UIRT_setup */
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/* Setup for the HE-TIRA1 device, which requires hardwired
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@ -1274,7 +1278,7 @@ static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv)
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priv->flags |= ASYNC_SPD_CUST;
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priv->custom_divisor = 240;
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priv->force_baud = B38400;
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priv->force_baud = 38400;
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priv->force_rtscts = 1;
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} /* ftdi_HE_TIRA1_setup */
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@ -1363,7 +1367,7 @@ static int ftdi_open (struct usb_serial_port *port, struct file *filp)
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/* ftdi_set_termios will send usb control messages */
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if (port->tty)
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ftdi_set_termios(port, NULL);
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ftdi_set_termios(port, port->tty->termios);
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/* FIXME: Flow control might be enabled, so it should be checked -
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we have no control of defaults! */
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@ -1933,32 +1937,32 @@ static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
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static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
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{ /* ftdi_termios */
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struct usb_device *dev = port->serial->dev;
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unsigned int cflag = port->tty->termios->c_cflag;
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struct ftdi_private *priv = usb_get_serial_port_data(port);
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struct ktermios *termios = port->tty->termios;
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unsigned int cflag = termios->c_cflag;
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__u16 urb_value; /* will hold the new flags */
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char buf[1]; /* Perhaps I should dynamically alloc this? */
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// Added for xon/xoff support
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unsigned int iflag = port->tty->termios->c_iflag;
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unsigned int iflag = termios->c_iflag;
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unsigned char vstop;
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unsigned char vstart;
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dbg("%s", __FUNCTION__);
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/* Force baud rate if this device requires it, unless it is set to B0. */
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if (priv->force_baud && ((port->tty->termios->c_cflag & CBAUD) != B0)) {
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if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) {
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dbg("%s: forcing baud rate for this device", __FUNCTION__);
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port->tty->termios->c_cflag &= ~CBAUD;
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port->tty->termios->c_cflag |= priv->force_baud;
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tty_encode_baud_rate(port->tty, priv->force_baud, priv->force_baud);
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}
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/* Force RTS-CTS if this device requires it. */
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if (priv->force_rtscts) {
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dbg("%s: forcing rtscts for this device", __FUNCTION__);
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port->tty->termios->c_cflag |= CRTSCTS;
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termios->c_cflag |= CRTSCTS;
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}
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cflag = port->tty->termios->c_cflag;
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cflag = termios->c_cflag;
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/* FIXME -For this cut I don't care if the line is really changing or
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not - so just do the change regardless - should be able to
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@ -1969,6 +1973,8 @@ static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old
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/* Set number of data bits, parity, stop bits */
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termios->c_cflag &= ~CMSPAR;
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urb_value = 0;
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urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
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FTDI_SIO_SET_DATA_STOP_BITS_1);
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@ -2048,8 +2054,8 @@ static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old
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// Set the vstart and vstop -- could have been done up above where
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// a lot of other dereferencing is done but that would be very
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// inefficient as vstart and vstop are not always needed
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vstart=port->tty->termios->c_cc[VSTART];
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vstop=port->tty->termios->c_cc[VSTOP];
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vstart = termios->c_cc[VSTART];
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vstop = termios->c_cc[VSTOP];
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urb_value=(vstop << 8) | (vstart);
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if (usb_control_msg(dev,
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