#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
struct qmi_wwan_state {
struct usb_driver *subdriver;
atomic_t pmcount;
- unsigned long unused;
+ unsigned long flags;
struct usb_interface *control;
struct usb_interface *data;
};
+enum qmi_wwan_flags {
+ QMI_WWAN_FLAG_RAWIP = 1 << 0,
+};
+
+static void qmi_wwan_netdev_setup(struct net_device *net)
+{
+ struct usbnet *dev = netdev_priv(net);
+ struct qmi_wwan_state *info = (void *)&dev->data;
+
+ if (info->flags & QMI_WWAN_FLAG_RAWIP) {
+ net->header_ops = NULL; /* No header */
+ net->type = ARPHRD_NONE;
+ net->hard_header_len = 0;
+ net->addr_len = 0;
+ net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+ netdev_dbg(net, "mode: raw IP\n");
+ } else if (!net->header_ops) { /* don't bother if already set */
+ ether_setup(net);
+ netdev_dbg(net, "mode: Ethernet\n");
+ }
+
+ /* recalculate buffers after changing hard_header_len */
+ usbnet_change_mtu(net, net->mtu);
+}
+
+static ssize_t raw_ip_show(struct device *d, struct device_attribute *attr, char *buf)
+{
+ struct usbnet *dev = netdev_priv(to_net_dev(d));
+ struct qmi_wwan_state *info = (void *)&dev->data;
+
+ return sprintf(buf, "%c\n", info->flags & QMI_WWAN_FLAG_RAWIP ? 'Y' : 'N');
+}
+
+static ssize_t raw_ip_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct usbnet *dev = netdev_priv(to_net_dev(d));
+ struct qmi_wwan_state *info = (void *)&dev->data;
+ bool enable;
+ int err;
+
+ if (strtobool(buf, &enable))
+ return -EINVAL;
+
+ /* no change? */
+ if (enable == (info->flags & QMI_WWAN_FLAG_RAWIP))
+ return len;
+
+ /* we don't want to modify a running netdev */
+ if (netif_running(dev->net)) {
+ netdev_err(dev->net, "Cannot change a running device\n");
+ return -EBUSY;
+ }
+
+ /* let other drivers deny the change */
+ err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev->net);
+ err = notifier_to_errno(err);
+ if (err) {
+ netdev_err(dev->net, "Type change was refused\n");
+ return err;
+ }
+
+ if (enable)
+ info->flags |= QMI_WWAN_FLAG_RAWIP;
+ else
+ info->flags &= ~QMI_WWAN_FLAG_RAWIP;
+ qmi_wwan_netdev_setup(dev->net);
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev->net);
+ return len;
+}
+
+static DEVICE_ATTR_RW(raw_ip);
+
+static struct attribute *qmi_wwan_sysfs_attrs[] = {
+ &dev_attr_raw_ip.attr,
+ NULL,
+};
+
+static struct attribute_group qmi_wwan_sysfs_attr_group = {
+ .name = "qmi",
+ .attrs = qmi_wwan_sysfs_attrs,
+};
+
/* default ethernet address used by the modem */
static const u8 default_modem_addr[ETH_ALEN] = {0x02, 0x50, 0xf3};
*/
static int qmi_wwan_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
+ struct qmi_wwan_state *info = (void *)&dev->data;
+ bool rawip = info->flags & QMI_WWAN_FLAG_RAWIP;
__be16 proto;
/* This check is no longer done by usbnet */
proto = htons(ETH_P_IPV6);
break;
case 0x00:
+ if (rawip)
+ return 0;
if (is_multicast_ether_addr(skb->data))
return 1;
/* possibly bogus destination - rewrite just in case */
skb_reset_mac_header(skb);
goto fix_dest;
default:
+ if (rawip)
+ return 0;
/* pass along other packets without modifications */
return 1;
}
+ if (rawip) {
+ skb->dev = dev->net; /* normally set by eth_type_trans */
+ skb->protocol = proto;
+ return 1;
+ }
+
if (skb_headroom(skb) < ETH_HLEN)
return 0;
skb_push(skb, ETH_HLEN);
dev->net->dev_addr[0] &= 0xbf; /* clear "IP" bit */
}
dev->net->netdev_ops = &qmi_wwan_netdev_ops;
+ dev->net->sysfs_groups[0] = &qmi_wwan_sysfs_attr_group;
err:
return status;
}