X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fusb%2Fserial%2Fusb_debug.c;h=28026b47344a2bee655a776f5cd5b72a79dede08;hb=5a0e3ad6af8660be21ca98a971cd00f331318c05;hp=a9427a8b86724ae7eec4f19198849293ebabbe44;hpb=715b1dc01fe44537e8fce9566e4bb48d6821d84b;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial/usb_debug.c
index a9427a8..28026b4 100644
--- a/drivers/usb/serial/usb_debug.c
+++ b/drivers/usb/serial/usb_debug.c
@@ -8,6 +8,7 @@
  *	2 as published by the Free Software Foundation.
  */
 
+#include <linux/gfp.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/tty.h>
@@ -17,8 +18,19 @@
 
 #define URB_DEBUG_MAX_IN_FLIGHT_URBS	4000
 #define USB_DEBUG_MAX_PACKET_SIZE	8
+#define USB_DEBUG_BRK_SIZE		8
+static char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = {
+	0x00,
+	0xff,
+	0x01,
+	0xfe,
+	0x00,
+	0xfe,
+	0x01,
+	0xff,
+};
 
-static struct usb_device_id id_table [] = {
+static const struct usb_device_id id_table[] = {
 	{ USB_DEVICE(0x0525, 0x127a) },
 	{ },
 };
@@ -32,11 +44,36 @@ static struct usb_driver debug_driver = {
 	.no_dynamic_id = 	1,
 };
 
-static int usb_debug_open(struct tty_struct *tty, struct usb_serial_port *port,
-							struct file *filp)
+static int usb_debug_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
 	port->bulk_out_size = USB_DEBUG_MAX_PACKET_SIZE;
-	return usb_serial_generic_open(tty, port, filp);
+	return usb_serial_generic_open(tty, port);
+}
+
+/* This HW really does not support a serial break, so one will be
+ * emulated when ever the break state is set to true.
+ */
+static void usb_debug_break_ctl(struct tty_struct *tty, int break_state)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	if (!break_state)
+		return;
+	usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE);
+}
+
+static void usb_debug_read_bulk_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+
+	if (urb->actual_length == USB_DEBUG_BRK_SIZE &&
+	    memcmp(urb->transfer_buffer, USB_DEBUG_BRK,
+		   USB_DEBUG_BRK_SIZE) == 0) {
+		usb_serial_handle_break(port);
+		usb_serial_generic_resubmit_read_urb(port, GFP_ATOMIC);
+		return;
+	}
+
+	usb_serial_generic_read_bulk_callback(urb);
 }
 
 static struct usb_serial_driver debug_device = {
@@ -48,6 +85,8 @@ static struct usb_serial_driver debug_device = {
 	.num_ports =		1,
 	.open =			usb_debug_open,
 	.max_in_flight_urbs =	URB_DEBUG_MAX_IN_FLIGHT_URBS,
+	.break_ctl =		usb_debug_break_ctl,
+	.read_bulk_callback =	usb_debug_read_bulk_callback,
 };
 
 static int __init debug_init(void)