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| author | John Tsiombikas <nuclear@member.fsf.org> | 2010-02-25 17:09:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-02 14:55:17 -0800 |
| commit | 67b9946dd07eeef8188e4cab816d2c370bcaa7b2 (patch) | |
| tree | 880b1a0bb8b04be2ce6be18152c02dcb992fd7a9 /drivers/usb | |
| parent | ac7d4ca9e0b27d7705d273f17afd29828db35ee6 (diff) | |
| download | lwn-67b9946dd07eeef8188e4cab816d2c370bcaa7b2.tar.gz lwn-67b9946dd07eeef8188e4cab816d2c370bcaa7b2.zip | |
USB: pl2303: initial TIOCGSERIAL support
I've got a trivial patch for the pl2303 driver, that's what I needed to
make the wacom serial tablet driver work properly. It uses the
TIOCGSERIAL ioctl to determine if it's talking to a serial device or
not, which I gather is rather common, but the pl2303 driver didn't
implement that ioctl.
Here's a patch, I'm not sure it's absolutely correct, I mostly looked at
other similar usbserial drivers to see what I must do, but it works for
me.
Signed-off-by: John Tsiombikas <nuclear@member.fsf.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/pl2303.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 571dcf182866..895d0722183e 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -895,10 +895,23 @@ static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) static int pl2303_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { + struct serial_struct ser; struct usb_serial_port *port = tty->driver_data; dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); switch (cmd) { + case TIOCGSERIAL: + memset(&ser, 0, sizeof ser); + ser.type = PORT_16654; + ser.line = port->serial->minor; + ser.port = port->number; + ser.baud_base = 460800; + + if (copy_to_user((void __user *)arg, &ser, sizeof ser)) + return -EFAULT; + + return 0; + case TIOCMIWAIT: dbg("%s (%d) TIOCMIWAIT", __func__, port->number); return wait_modem_info(port, arg); |