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path: root/recipes-kernel/linux/linux-at91-4.9.87/linux-4.9-quectel_qmi_wwan_support.patch
blob: d0b5fe0b67549721977de4f9c19ce8c92ecb895f (plain)
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Patch for QMI WWAN Driver to support the Quectel EG95 device.
==================================================================================
--- a/drivers/net/usb/qmi_wwan.c	2019-06-25 18:33:52.000000000 +0300
+++ b/drivers/net/usb/qmi_wwan.c	2019-06-25 18:38:06.858767868 +0300
@@ -224,6 +224,23 @@
 	return 1;
 }
 
+struct sk_buff *qmi_wwan_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
+{
+	if (dev->udev->descriptor.idVendor != cpu_to_le16(0x2c7c))
+		return skb;
+
+	// Skip Ethernet header from message
+	if (skb_pull(skb, ETH_HLEN)) {
+		return skb;
+	} else {
+		dev_err(&dev->intf->dev, "Packet Dropped ");
+	}
+
+	// Filter the packet out, release it
+	dev_kfree_skb_any(skb);
+	return NULL;
+}
+
 /* very simplistic detection of IPv4 or IPv6 headers */
 static bool possibly_iphdr(const char *data)
 {
@@ -445,6 +462,20 @@
 	}
 	dev->net->netdev_ops = &qmi_wwan_netdev_ops;
 	dev->net->sysfs_groups[0] = &qmi_wwan_sysfs_attr_group;
+
+	if (dev->udev->descriptor.idVendor == cpu_to_le16(0x2c7c)) {
+		dev_info(&intf->dev, "Quectel EG95 work on RawIP mode\n");
+		dev->net->flags |= IFF_NOARP;
+
+		usb_control_msg(
+		interface_to_usbdev(intf),
+		usb_sndctrlpipe(interface_to_usbdev(intf), 0),
+		0x22, //USB_CDC_REQ_SET_CONTROL_LINE_STATE
+		0x21, //USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE
+		1, //active CDC DTR
+		intf->cur_altsetting->desc.bInterfaceNumber,
+		NULL, 0, 100);
+	}
 err:
 	return status;
 }
@@ -536,6 +567,7 @@
 	.unbind		= qmi_wwan_unbind,
 	.manage_power	= qmi_wwan_manage_power,
 	.rx_fixup       = qmi_wwan_rx_fixup,
+	.tx_fixup	= qmi_wwan_tx_fixup,
 };
 
 static const struct driver_info	qmi_wwan_info_quirk_dtr = {
@@ -545,6 +577,7 @@
 	.unbind		= qmi_wwan_unbind,
 	.manage_power	= qmi_wwan_manage_power,
 	.rx_fixup       = qmi_wwan_rx_fixup,
+	.tx_fixup	= qmi_wwan_tx_fixup,
 	.data           = QMI_WWAN_QUIRK_DTR,
 };
 
@@ -947,6 +980,7 @@
 	{QMI_QUIRK_SET_DTR(0x2c7c, 0x0121, 4)},	/* Quectel EC21 Mini PCIe */
 	{QMI_FIXED_INTF(0x2c7c, 0x0296, 4)},	/* Quectel BG96 */
 	{QMI_QUIRK_SET_DTR(0x2c7c, 0x0306, 4)},	/* Quectel EP06 Mini PCIe */
+	{QMI_FIXED_INTF(0x2c7c, 0x0195, 4)},	/* Quectel EG95 */
 
 	/* 4. Gobi 1000 devices */
 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9212)},	/* Acer Gobi Modem Device */