Merge pull request hardkernel#24 from yan-wyb/khadas-vims-4.9.y

Add HUAWEI ME906s Supports

Author: numbqq

drivers/usb/serial/option.c

@@ -971,6 +971,7 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x06, 0x7A) },
 	{ USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x06, 0x7B) },
 	{ USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x06, 0x7C) },
+    { USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0xff, 0x06, 0x7C) },
 
 	/* Motorola devices */
 	{ USB_DEVICE_AND_INTERFACE_INFO(0x22b8, 0x2a70, 0xff, 0xff, 0xff) },	/* mdm6600 */
@@ -2113,6 +2114,12 @@ static int option_attach(struct usb_serial *serial)
 	struct usb_wwan_intf_private *data;
 	unsigned long device_flags;
 
+    if (serial->dev->descriptor.idVendor == HUAWEI_VENDOR_ID) {
+        if ( 0 != (serial->dev->config->desc.bmAttributes & 0x20)){
+            usb_enable_autosuspend(serial->dev);
+        }
+    }
+
 	data = kzalloc(sizeof(struct usb_wwan_intf_private), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

drivers/usb/serial/usb_wwan.c

@@ -36,6 +36,9 @@
 #include <linux/serial.h>
 #include "usb-wwan.h"
 
+#define HW_bcdUSB 0x0110
+#define HUAWEI_VENDOR_ID 0x12d1
+
 /*
  * Generate DTR/RTS signals on the port using the SET_CONTROL_LINE_STATE request
  * in CDC ACM.
@@ -217,6 +220,7 @@ int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
 {
 	struct usb_wwan_port_private *portdata;
 	struct usb_wwan_intf_private *intfdata;
+    struct usb_host_endpoint *ep;
 	int i;
 	int left, todo;
 	struct urb *this_urb = NULL;	/* spurious */
@@ -256,6 +260,15 @@ int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
 		memcpy(this_urb->transfer_buffer, buf, todo);
 		this_urb->transfer_buffer_length = todo;
 
+        if((HUAWEI_VENDOR_ID == port->serial->dev->descriptor.idVendor)
+                && (HW_bcdUSB != port->serial->dev->descriptor.bcdUSB)){
+            ep = usb_pipe_endpoint(this_urb->dev, this_urb->pipe);
+            if(ep && (0 != this_urb->transfer_buffer_length)
+                    && (0 == this_urb->transfer_buffer_length % ep->desc.wMaxPacketSize)){
+                this_urb->transfer_flags |= URB_ZERO_PACKET;
+            }
+        }
+
 		spin_lock_irqsave(&intfdata->susp_lock, flags);
 		if (intfdata->suspended) {
 			usb_anchor_urb(this_urb, &portdata->delayed);