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189 lines
4.8 KiB
189 lines
4.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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*/ |
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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 = __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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__skb_put_zero(skb, need_tail); |
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return skb; |
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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 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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usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER, |
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USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
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filter, 0, NULL, 0); |
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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_get_stats64 = dev_get_tstats64, |
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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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.disable_hub_initiated_lpm = 1, |
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}; |
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module_usb_driver(int51x1_driver); |
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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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