--- /dev/null
+/*
+ * Copyright (c) 2009 Peter Holik
+ *
+ * Intellon usb PLC (Powerline Communications) usb net driver
+ *
+ * http://www.tandel.be/downloads/INT51X1_Datasheet.pdf
+ *
+ * Based on the work of Jan 'RedBully' Seiffert
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or.
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/usb.h>
+#include <linux/usb/usbnet.h>
+
+#define INT51X1_VENDOR_ID 0x09e1
+#define INT51X1_PRODUCT_ID 0x5121
+
+#define INT51X1_HEADER_SIZE 2 /* 2 byte header */
+
+#define PACKET_TYPE_PROMISCUOUS (1 << 0)
+#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
+#define PACKET_TYPE_DIRECTED (1 << 2)
+#define PACKET_TYPE_BROADCAST (1 << 3)
+#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
+
+#define SET_ETHERNET_PACKET_FILTER 0x43
+
+static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+{
+ int len;
+
+ if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
+ deverr(dev, "unexpected tiny rx frame");
+ return 0;
+ }
+
+ len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);
+
+ skb_trim(skb, len);
+
+ return 1;
+}
+
+static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
+ struct sk_buff *skb, gfp_t flags)
+{
+ int pack_len = skb->len;
+ int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
+ int headroom = skb_headroom(skb);
+ int tailroom = skb_tailroom(skb);
+ int need_tail = 0;
+ __le16 *len;
+
+ /* if packet and our header is smaler than 64 pad to 64 (+ ZLP) */
+ if ((pack_with_header_len) < dev->maxpacket)
+ need_tail = dev->maxpacket - pack_with_header_len + 1;
+ /*
+ * usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
+ * but we need to know ourself, because this would add to the length
+ * we send down to the device...
+ */
+ else if (!(pack_with_header_len % dev->maxpacket))
+ need_tail = 1;
+
+ if (!skb_cloned(skb) &&
+ (headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
+ if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
+ skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
+ skb->data, skb->len);
+ skb_set_tail_pointer(skb, skb->len);
+ }
+ } else {
+ struct sk_buff *skb2;
+
+ skb2 = skb_copy_expand(skb,
+ INT51X1_HEADER_SIZE,
+ need_tail,
+ flags);
+ dev_kfree_skb_any(skb);
+ if (!skb2)
+ return NULL;
+ skb = skb2;
+ }
+
+ pack_len += need_tail;
+ pack_len &= 0x07ff;
+
+ len = (__le16 *) __skb_push(skb, INT51X1_HEADER_SIZE);
+ *len = cpu_to_le16(pack_len);
+
+ if(need_tail)
+ memset(__skb_put(skb, need_tail), 0, need_tail);
+
+ return skb;
+}
+
+static void int51x1_async_cmd_callback(struct urb *urb)
+{
+ struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
+ int status = urb->status;
+
+ if (status < 0)
+ dev_warn(&urb->dev->dev, "async callback failed with %d\n", status);
+
+ kfree(req);
+ usb_free_urb(urb);
+}
+
+static void int51x1_set_multicast(struct net_device *netdev)
+{
+ struct usb_ctrlrequest *req;
+ int status;
+ struct urb *urb;
+ struct usbnet *dev = netdev_priv(netdev);
+ u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;
+
+ if (netdev->flags & IFF_PROMISC) {
+ /* do not expect to see traffic of other PLCs */
+ filter |= PACKET_TYPE_PROMISCUOUS;
+ devinfo(dev, "promiscuous mode enabled");
+ } else if (netdev->mc_count ||
+ (netdev->flags & IFF_ALLMULTI)) {
+ filter |= PACKET_TYPE_ALL_MULTICAST;
+ devdbg(dev, "receive all multicast enabled");
+ } else {
+ /* ~PROMISCUOUS, ~MULTICAST */
+ devdbg(dev, "receive own packets only");
+ }
+
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urb) {
+ devwarn(dev, "Error allocating URB");
+ return;
+ }
+
+ req = kmalloc(sizeof(*req), GFP_ATOMIC);
+ if (!req) {
+ devwarn(dev, "Error allocating control msg");
+ goto out;
+ }
+
+ req->bRequestType = USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
+ req->bRequest = SET_ETHERNET_PACKET_FILTER;
+ req->wValue = cpu_to_le16(filter);
+ req->wIndex = 0;
+ req->wLength = 0;
+
+ usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
+ (void *)req, NULL, 0,
+ int51x1_async_cmd_callback,
+ (void *)req);
+
+ status = usb_submit_urb(urb, GFP_ATOMIC);
+ if (status < 0) {
+ devwarn(dev, "Error submitting control msg, sts=%d", status);
+ goto out1;
+ }
+ return;
+out1:
+ kfree(req);
+out:
+ usb_free_urb(urb);
+}
+
+static const struct net_device_ops int51x1_netdev_ops = {
+ .ndo_open = usbnet_open,
+ .ndo_stop = usbnet_stop,
+ .ndo_start_xmit = usbnet_start_xmit,
+ .ndo_tx_timeout = usbnet_tx_timeout,
+ .ndo_change_mtu = usbnet_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_multicast_list = int51x1_set_multicast,
+};
+
+static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
+{
+ int status = usbnet_get_ethernet_addr(dev, 3);
+
+ if (status)
+ return status;
+
+ dev->net->hard_header_len += INT51X1_HEADER_SIZE;
+ dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
+ dev->net->netdev_ops = &int51x1_netdev_ops;
+
+ return usbnet_get_endpoints(dev, intf);
+}
+
+static const struct driver_info int51x1_info = {
+ .description = "Intellon usb powerline adapter",
+ .bind = int51x1_bind,
+ .rx_fixup = int51x1_rx_fixup,
+ .tx_fixup = int51x1_tx_fixup,
+ .in = 1,
+ .out = 2,
+ .flags = FLAG_ETHER,
+};
+
+static const struct usb_device_id products[] = {
+ {
+ USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
+ .driver_info = (unsigned long) &int51x1_info,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(usb, products);
+
+static struct usb_driver int51x1_driver = {
+ .name = "int51x1",
+ .id_table = products,
+ .probe = usbnet_probe,
+ .disconnect = usbnet_disconnect,
+ .suspend = usbnet_suspend,
+ .resume = usbnet_resume,
+};
+
+static int __init int51x1_init(void)
+{
+ return usb_register(&int51x1_driver);
+}
+module_init(int51x1_init);
+
+static void __exit int51x1_exit(void)
+{
+ usb_deregister(&int51x1_driver);
+}
+module_exit(int51x1_exit);
+
+MODULE_AUTHOR("Peter Holik");
+MODULE_DESCRIPTION("Intellon usb powerline adapter");
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff