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Peter Holik4510d7c2009-04-18 07:24:21 +00001/*
2 * Copyright (c) 2009 Peter Holik
3 *
4 * Intellon usb PLC (Powerline Communications) usb net driver
5 *
6 * http://www.tandel.be/downloads/INT51X1_Datasheet.pdf
7 *
8 * Based on the work of Jan 'RedBully' Seiffert
9 */
10
11/*
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or.
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27#include <linux/module.h>
28#include <linux/ctype.h>
29#include <linux/netdevice.h>
30#include <linux/etherdevice.h>
31#include <linux/ethtool.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090032#include <linux/slab.h>
Peter Holik4510d7c2009-04-18 07:24:21 +000033#include <linux/mii.h>
34#include <linux/usb.h>
35#include <linux/usb/usbnet.h>
36
37#define INT51X1_VENDOR_ID 0x09e1
38#define INT51X1_PRODUCT_ID 0x5121
39
40#define INT51X1_HEADER_SIZE 2 /* 2 byte header */
41
42#define PACKET_TYPE_PROMISCUOUS (1 << 0)
43#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
44#define PACKET_TYPE_DIRECTED (1 << 2)
45#define PACKET_TYPE_BROADCAST (1 << 3)
46#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
47
48#define SET_ETHERNET_PACKET_FILTER 0x43
49
50static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
51{
52 int len;
53
54 if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
Joe Perches60b86752010-02-17 10:30:23 +000055 netdev_err(dev->net, "unexpected tiny rx frame\n");
Peter Holik4510d7c2009-04-18 07:24:21 +000056 return 0;
57 }
58
59 len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);
60
61 skb_trim(skb, len);
62
63 return 1;
64}
65
66static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
67 struct sk_buff *skb, gfp_t flags)
68{
69 int pack_len = skb->len;
70 int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
71 int headroom = skb_headroom(skb);
72 int tailroom = skb_tailroom(skb);
73 int need_tail = 0;
74 __le16 *len;
75
76 /* if packet and our header is smaler than 64 pad to 64 (+ ZLP) */
77 if ((pack_with_header_len) < dev->maxpacket)
78 need_tail = dev->maxpacket - pack_with_header_len + 1;
79 /*
80 * usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
81 * but we need to know ourself, because this would add to the length
82 * we send down to the device...
83 */
84 else if (!(pack_with_header_len % dev->maxpacket))
85 need_tail = 1;
86
87 if (!skb_cloned(skb) &&
88 (headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
89 if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
90 skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
91 skb->data, skb->len);
92 skb_set_tail_pointer(skb, skb->len);
93 }
94 } else {
95 struct sk_buff *skb2;
96
97 skb2 = skb_copy_expand(skb,
98 INT51X1_HEADER_SIZE,
99 need_tail,
100 flags);
101 dev_kfree_skb_any(skb);
102 if (!skb2)
103 return NULL;
104 skb = skb2;
105 }
106
107 pack_len += need_tail;
108 pack_len &= 0x07ff;
109
110 len = (__le16 *) __skb_push(skb, INT51X1_HEADER_SIZE);
111 *len = cpu_to_le16(pack_len);
112
113 if(need_tail)
114 memset(__skb_put(skb, need_tail), 0, need_tail);
115
116 return skb;
117}
118
Peter Holik4510d7c2009-04-18 07:24:21 +0000119static void int51x1_set_multicast(struct net_device *netdev)
120{
Peter Holik4510d7c2009-04-18 07:24:21 +0000121 struct usbnet *dev = netdev_priv(netdev);
122 u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;
123
124 if (netdev->flags & IFF_PROMISC) {
125 /* do not expect to see traffic of other PLCs */
126 filter |= PACKET_TYPE_PROMISCUOUS;
Joe Perches60b86752010-02-17 10:30:23 +0000127 netdev_info(dev->net, "promiscuous mode enabled\n");
Jiri Pirko4cd24ea2010-02-08 04:30:35 +0000128 } else if (!netdev_mc_empty(netdev) ||
Peter Holik4510d7c2009-04-18 07:24:21 +0000129 (netdev->flags & IFF_ALLMULTI)) {
130 filter |= PACKET_TYPE_ALL_MULTICAST;
Joe Perches60b86752010-02-17 10:30:23 +0000131 netdev_dbg(dev->net, "receive all multicast enabled\n");
Peter Holik4510d7c2009-04-18 07:24:21 +0000132 } else {
133 /* ~PROMISCUOUS, ~MULTICAST */
Joe Perches60b86752010-02-17 10:30:23 +0000134 netdev_dbg(dev->net, "receive own packets only\n");
Peter Holik4510d7c2009-04-18 07:24:21 +0000135 }
136
Ming Lei3898cdf2012-10-24 19:46:58 +0000137 usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER,
138 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
139 filter, 0, NULL, 0);
Peter Holik4510d7c2009-04-18 07:24:21 +0000140}
141
142static const struct net_device_ops int51x1_netdev_ops = {
143 .ndo_open = usbnet_open,
144 .ndo_stop = usbnet_stop,
145 .ndo_start_xmit = usbnet_start_xmit,
146 .ndo_tx_timeout = usbnet_tx_timeout,
147 .ndo_change_mtu = usbnet_change_mtu,
148 .ndo_set_mac_address = eth_mac_addr,
149 .ndo_validate_addr = eth_validate_addr,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000150 .ndo_set_rx_mode = int51x1_set_multicast,
Peter Holik4510d7c2009-04-18 07:24:21 +0000151};
152
153static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
154{
155 int status = usbnet_get_ethernet_addr(dev, 3);
156
157 if (status)
158 return status;
159
160 dev->net->hard_header_len += INT51X1_HEADER_SIZE;
161 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
162 dev->net->netdev_ops = &int51x1_netdev_ops;
163
164 return usbnet_get_endpoints(dev, intf);
165}
166
167static const struct driver_info int51x1_info = {
168 .description = "Intellon usb powerline adapter",
169 .bind = int51x1_bind,
170 .rx_fixup = int51x1_rx_fixup,
171 .tx_fixup = int51x1_tx_fixup,
172 .in = 1,
173 .out = 2,
174 .flags = FLAG_ETHER,
175};
176
177static const struct usb_device_id products[] = {
178 {
179 USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
180 .driver_info = (unsigned long) &int51x1_info,
181 },
182 {},
183};
184MODULE_DEVICE_TABLE(usb, products);
185
186static struct usb_driver int51x1_driver = {
187 .name = "int51x1",
188 .id_table = products,
189 .probe = usbnet_probe,
190 .disconnect = usbnet_disconnect,
191 .suspend = usbnet_suspend,
192 .resume = usbnet_resume,
Sarah Sharpe1f12eb2012-04-23 10:08:51 -0700193 .disable_hub_initiated_lpm = 1,
Peter Holik4510d7c2009-04-18 07:24:21 +0000194};
195
Greg Kroah-Hartmand632eb12011-11-18 09:44:20 -0800196module_usb_driver(int51x1_driver);
Peter Holik4510d7c2009-04-18 07:24:21 +0000197
198MODULE_AUTHOR("Peter Holik");
199MODULE_DESCRIPTION("Intellon usb powerline adapter");
200MODULE_LICENSE("GPL");