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