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path: root/drivers/usb/serial/usb_wwan.c
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Diffstat (limited to 'drivers/usb/serial/usb_wwan.c')
-rw-r--r--drivers/usb/serial/usb_wwan.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index fbc946797801..b004b2a485c3 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -31,8 +31,10 @@
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/bitops.h>
+#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
+#include <linux/serial.h>
#include "usb-wwan.h"
static int debug;
@@ -123,6 +125,83 @@ int usb_wwan_tiocmset(struct tty_struct *tty, struct file *file,
}
EXPORT_SYMBOL(usb_wwan_tiocmset);
+static int get_serial_info(struct usb_serial_port *port,
+ struct serial_struct __user *retinfo)
+{
+ struct serial_struct tmp;
+
+ if (!retinfo)
+ return -EFAULT;
+
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.line = port->serial->minor;
+ tmp.port = port->number;
+ tmp.baud_base = tty_get_baud_rate(port->port.tty);
+ tmp.close_delay = port->port.close_delay / 10;
+ tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
+ ASYNC_CLOSING_WAIT_NONE :
+ port->port.closing_wait / 10;
+
+ if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+ return -EFAULT;
+ return 0;
+}
+
+static int set_serial_info(struct usb_serial_port *port,
+ struct serial_struct __user *newinfo)
+{
+ struct serial_struct new_serial;
+ unsigned int closing_wait, close_delay;
+ int retval = 0;
+
+ if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
+ return -EFAULT;
+
+ close_delay = new_serial.close_delay * 10;
+ closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
+ ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
+
+ mutex_lock(&port->port.mutex);
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if ((close_delay != port->port.close_delay) ||
+ (closing_wait != port->port.closing_wait))
+ retval = -EPERM;
+ else
+ retval = -EOPNOTSUPP;
+ } else {
+ port->port.close_delay = close_delay;
+ port->port.closing_wait = closing_wait;
+ }
+
+ mutex_unlock(&port->port.mutex);
+ return retval;
+}
+
+int usb_wwan_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial_port *port = tty->driver_data;
+
+ dbg("%s cmd 0x%04x", __func__, cmd);
+
+ switch (cmd) {
+ case TIOCGSERIAL:
+ return get_serial_info(port,
+ (struct serial_struct __user *) arg);
+ case TIOCSSERIAL:
+ return set_serial_info(port,
+ (struct serial_struct __user *) arg);
+ default:
+ break;
+ }
+
+ dbg("%s arg not supported", __func__);
+
+ return -ENOIOCTLCMD;
+}
+EXPORT_SYMBOL(usb_wwan_ioctl);
+
/* Write */
int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count)