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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | /* * 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, see <http://www.gnu.org/licenses/>. */ #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_set_multicast(struct net_device *netdev) { 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"); } usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER, USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, filter, 0, NULL, 0); } 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_rx_mode = 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, .disable_hub_initiated_lpm = 1, }; module_usb_driver(int51x1_driver); MODULE_AUTHOR("Peter Holik"); MODULE_DESCRIPTION("Intellon usb powerline adapter"); MODULE_LICENSE("GPL"); |