/* * 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/slab.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))) { netdev_err(dev->net, "unexpected tiny rx frame\n"); 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; netdev_info(dev->net, "promiscuous mode enabled\n"); } else if (!netdev_mc_empty(netdev) || (netdev->flags & IFF_ALLMULTI)) { filter |= PACKET_TYPE_ALL_MULTICAST; netdev_dbg(dev->net, "receive all multicast enabled\n"); } else { /* ~PROMISCUOUS, ~MULTICAST */ netdev_dbg(dev->net, "receive own packets only\n"); } urb = usb_alloc_urb(0, GFP_ATOMIC); if (!urb) { netdev_warn(dev->net, "Error allocating URB\n"); return; } req = kmalloc(sizeof(*req), GFP_ATOMIC); if (!req) { netdev_warn(dev->net, "Error allocating control msg\n"); 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) { netdev_warn(dev->net, "Error submitting control msg, sts=%d\n", 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");