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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2009 Peter Holik
4 *
5 * Intellon usb PLC (Powerline Communications) usb net driver
6 *
7 * http://www.tandel.be/downloads/INT51X1_Datasheet.pdf
8 *
9 * Based on the work of Jan 'RedBully' Seiffert
10 */
11
12/*
13 */
14
15#include <linux/module.h>
16#include <linux/ctype.h>
17#include <linux/netdevice.h>
18#include <linux/etherdevice.h>
19#include <linux/ethtool.h>
20#include <linux/slab.h>
21#include <linux/mii.h>
22#include <linux/usb.h>
23#include <linux/usb/usbnet.h>
24
25#define INT51X1_VENDOR_ID 0x09e1
26#define INT51X1_PRODUCT_ID 0x5121
27
28#define INT51X1_HEADER_SIZE 2 /* 2 byte header */
29
30#define PACKET_TYPE_PROMISCUOUS (1 << 0)
31#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */
32#define PACKET_TYPE_DIRECTED (1 << 2)
33#define PACKET_TYPE_BROADCAST (1 << 3)
34#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */
35
36#define SET_ETHERNET_PACKET_FILTER 0x43
37
38static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
39{
40 int len;
41
42 if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
43 netdev_err(dev->net, "unexpected tiny rx frame\n");
44 return 0;
45 }
46
47 len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);
48
49 skb_trim(skb, len);
50
51 return 1;
52}
53
54static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
55 struct sk_buff *skb, gfp_t flags)
56{
57 int pack_len = skb->len;
58 int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
59 int headroom = skb_headroom(skb);
60 int tailroom = skb_tailroom(skb);
61 int need_tail = 0;
62 __le16 *len;
63
64 /* if packet and our header is smaller than 64 pad to 64 (+ ZLP) */
65 if ((pack_with_header_len) < dev->maxpacket)
66 need_tail = dev->maxpacket - pack_with_header_len + 1;
67 /*
68 * usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
69 * but we need to know ourself, because this would add to the length
70 * we send down to the device...
71 */
72 else if (!(pack_with_header_len % dev->maxpacket))
73 need_tail = 1;
74
75 if (!skb_cloned(skb) &&
76 (headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
77 if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
78 skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
79 skb->data, skb->len);
80 skb_set_tail_pointer(skb, skb->len);
81 }
82 } else {
83 struct sk_buff *skb2;
84
85 skb2 = skb_copy_expand(skb,
86 INT51X1_HEADER_SIZE,
87 need_tail,
88 flags);
89 dev_kfree_skb_any(skb);
90 if (!skb2)
91 return NULL;
92 skb = skb2;
93 }
94
95 pack_len += need_tail;
96 pack_len &= 0x07ff;
97
98 len = __skb_push(skb, INT51X1_HEADER_SIZE);
99 *len = cpu_to_le16(pack_len);
100
101 if(need_tail)
102 __skb_put_zero(skb, need_tail);
103
104 return skb;
105}
106
107static void int51x1_set_multicast(struct net_device *netdev)
108{
109 struct usbnet *dev = netdev_priv(netdev);
110 u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;
111
112 if (netdev->flags & IFF_PROMISC) {
113 /* do not expect to see traffic of other PLCs */
114 filter |= PACKET_TYPE_PROMISCUOUS;
115 netdev_info(dev->net, "promiscuous mode enabled\n");
116 } else if (!netdev_mc_empty(netdev) ||
117 (netdev->flags & IFF_ALLMULTI)) {
118 filter |= PACKET_TYPE_ALL_MULTICAST;
119 netdev_dbg(dev->net, "receive all multicast enabled\n");
120 } else {
121 /* ~PROMISCUOUS, ~MULTICAST */
122 netdev_dbg(dev->net, "receive own packets only\n");
123 }
124
125 usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER,
126 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
127 filter, 0, NULL, 0);
128}
129
130static const struct net_device_ops int51x1_netdev_ops = {
131 .ndo_open = usbnet_open,
132 .ndo_stop = usbnet_stop,
133 .ndo_start_xmit = usbnet_start_xmit,
134 .ndo_tx_timeout = usbnet_tx_timeout,
135 .ndo_change_mtu = usbnet_change_mtu,
136 .ndo_get_stats64 = dev_get_tstats64,
137 .ndo_set_mac_address = eth_mac_addr,
138 .ndo_validate_addr = eth_validate_addr,
139 .ndo_set_rx_mode = int51x1_set_multicast,
140};
141
142static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
143{
144 int status = usbnet_get_ethernet_addr(dev, 3);
145
146 if (status)
147 return status;
148
149 dev->net->hard_header_len += INT51X1_HEADER_SIZE;
150 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
151 dev->net->netdev_ops = &int51x1_netdev_ops;
152
153 return usbnet_get_endpoints(dev, intf);
154}
155
156static const struct driver_info int51x1_info = {
157 .description = "Intellon usb powerline adapter",
158 .bind = int51x1_bind,
159 .rx_fixup = int51x1_rx_fixup,
160 .tx_fixup = int51x1_tx_fixup,
161 .in = 1,
162 .out = 2,
163 .flags = FLAG_ETHER,
164};
165
166static const struct usb_device_id products[] = {
167 {
168 USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
169 .driver_info = (unsigned long) &int51x1_info,
170 },
171 {},
172};
173MODULE_DEVICE_TABLE(usb, products);
174
175static struct usb_driver int51x1_driver = {
176 .name = "int51x1",
177 .id_table = products,
178 .probe = usbnet_probe,
179 .disconnect = usbnet_disconnect,
180 .suspend = usbnet_suspend,
181 .resume = usbnet_resume,
182 .disable_hub_initiated_lpm = 1,
183};
184
185module_usb_driver(int51x1_driver);
186
187MODULE_AUTHOR("Peter Holik");
188MODULE_DESCRIPTION("Intellon usb powerline adapter");
189MODULE_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, 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>
32#include <linux/slab.h>
33#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))) {
55 netdev_err(dev->net, "unexpected tiny rx frame\n");
56 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
119static void int51x1_async_cmd_callback(struct urb *urb)
120{
121 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
122 int status = urb->status;
123
124 if (status < 0)
125 dev_warn(&urb->dev->dev, "async callback failed with %d\n", status);
126
127 kfree(req);
128 usb_free_urb(urb);
129}
130
131static void int51x1_set_multicast(struct net_device *netdev)
132{
133 struct usb_ctrlrequest *req;
134 int status;
135 struct urb *urb;
136 struct usbnet *dev = netdev_priv(netdev);
137 u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST;
138
139 if (netdev->flags & IFF_PROMISC) {
140 /* do not expect to see traffic of other PLCs */
141 filter |= PACKET_TYPE_PROMISCUOUS;
142 netdev_info(dev->net, "promiscuous mode enabled\n");
143 } else if (!netdev_mc_empty(netdev) ||
144 (netdev->flags & IFF_ALLMULTI)) {
145 filter |= PACKET_TYPE_ALL_MULTICAST;
146 netdev_dbg(dev->net, "receive all multicast enabled\n");
147 } else {
148 /* ~PROMISCUOUS, ~MULTICAST */
149 netdev_dbg(dev->net, "receive own packets only\n");
150 }
151
152 urb = usb_alloc_urb(0, GFP_ATOMIC);
153 if (!urb) {
154 netdev_warn(dev->net, "Error allocating URB\n");
155 return;
156 }
157
158 req = kmalloc(sizeof(*req), GFP_ATOMIC);
159 if (!req) {
160 netdev_warn(dev->net, "Error allocating control msg\n");
161 goto out;
162 }
163
164 req->bRequestType = USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
165 req->bRequest = SET_ETHERNET_PACKET_FILTER;
166 req->wValue = cpu_to_le16(filter);
167 req->wIndex = 0;
168 req->wLength = 0;
169
170 usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
171 (void *)req, NULL, 0,
172 int51x1_async_cmd_callback,
173 (void *)req);
174
175 status = usb_submit_urb(urb, GFP_ATOMIC);
176 if (status < 0) {
177 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
178 status);
179 goto out1;
180 }
181 return;
182out1:
183 kfree(req);
184out:
185 usb_free_urb(urb);
186}
187
188static const struct net_device_ops int51x1_netdev_ops = {
189 .ndo_open = usbnet_open,
190 .ndo_stop = usbnet_stop,
191 .ndo_start_xmit = usbnet_start_xmit,
192 .ndo_tx_timeout = usbnet_tx_timeout,
193 .ndo_change_mtu = usbnet_change_mtu,
194 .ndo_set_mac_address = eth_mac_addr,
195 .ndo_validate_addr = eth_validate_addr,
196 .ndo_set_rx_mode = int51x1_set_multicast,
197};
198
199static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
200{
201 int status = usbnet_get_ethernet_addr(dev, 3);
202
203 if (status)
204 return status;
205
206 dev->net->hard_header_len += INT51X1_HEADER_SIZE;
207 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
208 dev->net->netdev_ops = &int51x1_netdev_ops;
209
210 return usbnet_get_endpoints(dev, intf);
211}
212
213static const struct driver_info int51x1_info = {
214 .description = "Intellon usb powerline adapter",
215 .bind = int51x1_bind,
216 .rx_fixup = int51x1_rx_fixup,
217 .tx_fixup = int51x1_tx_fixup,
218 .in = 1,
219 .out = 2,
220 .flags = FLAG_ETHER,
221};
222
223static const struct usb_device_id products[] = {
224 {
225 USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
226 .driver_info = (unsigned long) &int51x1_info,
227 },
228 {},
229};
230MODULE_DEVICE_TABLE(usb, products);
231
232static struct usb_driver int51x1_driver = {
233 .name = "int51x1",
234 .id_table = products,
235 .probe = usbnet_probe,
236 .disconnect = usbnet_disconnect,
237 .suspend = usbnet_suspend,
238 .resume = usbnet_resume,
239 .disable_hub_initiated_lpm = 1,
240};
241
242module_usb_driver(int51x1_driver);
243
244MODULE_AUTHOR("Peter Holik");
245MODULE_DESCRIPTION("Intellon usb powerline adapter");
246MODULE_LICENSE("GPL");