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1/*
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, see <http://www.gnu.org/licenses/>.
24 */
25
26#include <linux/module.h>
27#include <linux/ctype.h>
28#include <linux/netdevice.h>
29#include <linux/etherdevice.h>
30#include <linux/ethtool.h>
31#include <linux/slab.h>
32#include <linux/mii.h>
33#include <linux/usb.h>
34#include <linux/usb/usbnet.h>
35
36#define INT51X1_VENDOR_ID 0x09e1
37#define INT51X1_PRODUCT_ID 0x5121
38
39#define INT51X1_HEADER_SIZE 2 /* 2 byte header */
40
41#define PACKET_TYPE_PROMISCUOUS (1 << 0)
42#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
43#define PACKET_TYPE_DIRECTED (1 << 2)
44#define PACKET_TYPE_BROADCAST (1 << 3)
45#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
46
47#define SET_ETHERNET_PACKET_FILTER 0x43
48
49static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
50{
51 int len;
52
53 if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
54 netdev_err(dev->net, "unexpected tiny rx frame\n");
55 return 0;
56 }
57
58 len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);
59
60 skb_trim(skb, len);
61
62 return 1;
63}
64
65static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
66 struct sk_buff *skb, gfp_t flags)
67{
68 int pack_len = skb->len;
69 int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
70 int headroom = skb_headroom(skb);
71 int tailroom = skb_tailroom(skb);
72 int need_tail = 0;
73 __le16 *len;
74
75 /* if packet and our header is smaler than 64 pad to 64 (+ ZLP) */
76 if ((pack_with_header_len) < dev->maxpacket)
77 need_tail = dev->maxpacket - pack_with_header_len + 1;
78 /*
79 * usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
80 * but we need to know ourself, because this would add to the length
81 * we send down to the device...
82 */
83 else if (!(pack_with_header_len % dev->maxpacket))
84 need_tail = 1;
85
86 if (!skb_cloned(skb) &&
87 (headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
88 if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
89 skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
90 skb->data, skb->len);
91 skb_set_tail_pointer(skb, skb->len);
92 }
93 } else {
94 struct sk_buff *skb2;
95
96 skb2 = skb_copy_expand(skb,
97 INT51X1_HEADER_SIZE,
98 need_tail,
99 flags);
100 dev_kfree_skb_any(skb);
101 if (!skb2)
102 return NULL;
103 skb = skb2;
104 }
105
106 pack_len += need_tail;
107 pack_len &= 0x07ff;
108
109 len = (__le16 *) __skb_push(skb, INT51X1_HEADER_SIZE);
110 *len = cpu_to_le16(pack_len);
111
112 if(need_tail)
113 memset(__skb_put(skb, need_tail), 0, need_tail);
114
115 return skb;
116}
117
118static void int51x1_set_multicast(struct net_device *netdev)
119{
120 struct usbnet *dev = netdev_priv(netdev);
121 u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;
122
123 if (netdev->flags & IFF_PROMISC) {
124 /* do not expect to see traffic of other PLCs */
125 filter |= PACKET_TYPE_PROMISCUOUS;
126 netdev_info(dev->net, "promiscuous mode enabled\n");
127 } else if (!netdev_mc_empty(netdev) ||
128 (netdev->flags & IFF_ALLMULTI)) {
129 filter |= PACKET_TYPE_ALL_MULTICAST;
130 netdev_dbg(dev->net, "receive all multicast enabled\n");
131 } else {
132 /* ~PROMISCUOUS, ~MULTICAST */
133 netdev_dbg(dev->net, "receive own packets only\n");
134 }
135
136 usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER,
137 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
138 filter, 0, NULL, 0);
139}
140
141static const struct net_device_ops int51x1_netdev_ops = {
142 .ndo_open = usbnet_open,
143 .ndo_stop = usbnet_stop,
144 .ndo_start_xmit = usbnet_start_xmit,
145 .ndo_tx_timeout = usbnet_tx_timeout,
146 .ndo_change_mtu = usbnet_change_mtu,
147 .ndo_set_mac_address = eth_mac_addr,
148 .ndo_validate_addr = eth_validate_addr,
149 .ndo_set_rx_mode = int51x1_set_multicast,
150};
151
152static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
153{
154 int status = usbnet_get_ethernet_addr(dev, 3);
155
156 if (status)
157 return status;
158
159 dev->net->hard_header_len += INT51X1_HEADER_SIZE;
160 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
161 dev->net->netdev_ops = &int51x1_netdev_ops;
162
163 return usbnet_get_endpoints(dev, intf);
164}
165
166static const struct driver_info int51x1_info = {
167 .description = "Intellon usb powerline adapter",
168 .bind = int51x1_bind,
169 .rx_fixup = int51x1_rx_fixup,
170 .tx_fixup = int51x1_tx_fixup,
171 .in = 1,
172 .out = 2,
173 .flags = FLAG_ETHER,
174};
175
176static const struct usb_device_id products[] = {
177 {
178 USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
179 .driver_info = (unsigned long) &int51x1_info,
180 },
181 {},
182};
183MODULE_DEVICE_TABLE(usb, products);
184
185static struct usb_driver int51x1_driver = {
186 .name = "int51x1",
187 .id_table = products,
188 .probe = usbnet_probe,
189 .disconnect = usbnet_disconnect,
190 .suspend = usbnet_suspend,
191 .resume = usbnet_resume,
192 .disable_hub_initiated_lpm = 1,
193};
194
195module_usb_driver(int51x1_driver);
196
197MODULE_AUTHOR("Peter Holik");
198MODULE_DESCRIPTION("Intellon usb powerline adapter");
199MODULE_LICENSE("GPL");
1/*
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, see <http://www.gnu.org/licenses/>.
24 */
25
26#include <linux/module.h>
27#include <linux/ctype.h>
28#include <linux/netdevice.h>
29#include <linux/etherdevice.h>
30#include <linux/ethtool.h>
31#include <linux/slab.h>
32#include <linux/mii.h>
33#include <linux/usb.h>
34#include <linux/usb/usbnet.h>
35
36#define INT51X1_VENDOR_ID 0x09e1
37#define INT51X1_PRODUCT_ID 0x5121
38
39#define INT51X1_HEADER_SIZE 2 /* 2 byte header */
40
41#define PACKET_TYPE_PROMISCUOUS (1 << 0)
42#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
43#define PACKET_TYPE_DIRECTED (1 << 2)
44#define PACKET_TYPE_BROADCAST (1 << 3)
45#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
46
47#define SET_ETHERNET_PACKET_FILTER 0x43
48
49static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
50{
51 int len;
52
53 if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
54 netdev_err(dev->net, "unexpected tiny rx frame\n");
55 return 0;
56 }
57
58 len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);
59
60 skb_trim(skb, len);
61
62 return 1;
63}
64
65static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
66 struct sk_buff *skb, gfp_t flags)
67{
68 int pack_len = skb->len;
69 int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
70 int headroom = skb_headroom(skb);
71 int tailroom = skb_tailroom(skb);
72 int need_tail = 0;
73 __le16 *len;
74
75 /* if packet and our header is smaler than 64 pad to 64 (+ ZLP) */
76 if ((pack_with_header_len) < dev->maxpacket)
77 need_tail = dev->maxpacket - pack_with_header_len + 1;
78 /*
79 * usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
80 * but we need to know ourself, because this would add to the length
81 * we send down to the device...
82 */
83 else if (!(pack_with_header_len % dev->maxpacket))
84 need_tail = 1;
85
86 if (!skb_cloned(skb) &&
87 (headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
88 if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
89 skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
90 skb->data, skb->len);
91 skb_set_tail_pointer(skb, skb->len);
92 }
93 } else {
94 struct sk_buff *skb2;
95
96 skb2 = skb_copy_expand(skb,
97 INT51X1_HEADER_SIZE,
98 need_tail,
99 flags);
100 dev_kfree_skb_any(skb);
101 if (!skb2)
102 return NULL;
103 skb = skb2;
104 }
105
106 pack_len += need_tail;
107 pack_len &= 0x07ff;
108
109 len = __skb_push(skb, INT51X1_HEADER_SIZE);
110 *len = cpu_to_le16(pack_len);
111
112 if(need_tail)
113 __skb_put_zero(skb, need_tail);
114
115 return skb;
116}
117
118static void int51x1_set_multicast(struct net_device *netdev)
119{
120 struct usbnet *dev = netdev_priv(netdev);
121 u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;
122
123 if (netdev->flags & IFF_PROMISC) {
124 /* do not expect to see traffic of other PLCs */
125 filter |= PACKET_TYPE_PROMISCUOUS;
126 netdev_info(dev->net, "promiscuous mode enabled\n");
127 } else if (!netdev_mc_empty(netdev) ||
128 (netdev->flags & IFF_ALLMULTI)) {
129 filter |= PACKET_TYPE_ALL_MULTICAST;
130 netdev_dbg(dev->net, "receive all multicast enabled\n");
131 } else {
132 /* ~PROMISCUOUS, ~MULTICAST */
133 netdev_dbg(dev->net, "receive own packets only\n");
134 }
135
136 usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER,
137 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
138 filter, 0, NULL, 0);
139}
140
141static const struct net_device_ops int51x1_netdev_ops = {
142 .ndo_open = usbnet_open,
143 .ndo_stop = usbnet_stop,
144 .ndo_start_xmit = usbnet_start_xmit,
145 .ndo_tx_timeout = usbnet_tx_timeout,
146 .ndo_change_mtu = usbnet_change_mtu,
147 .ndo_get_stats64 = usbnet_get_stats64,
148 .ndo_set_mac_address = eth_mac_addr,
149 .ndo_validate_addr = eth_validate_addr,
150 .ndo_set_rx_mode = int51x1_set_multicast,
151};
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,
193 .disable_hub_initiated_lpm = 1,
194};
195
196module_usb_driver(int51x1_driver);
197
198MODULE_AUTHOR("Peter Holik");
199MODULE_DESCRIPTION("Intellon usb powerline adapter");
200MODULE_LICENSE("GPL");