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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
41
42#define PACKET_TYPE_PROMISCUOUS (1 << 0)
43#define PACKET_TYPE_ALL_MULTICAST (1 << 1)
44#define PACKET_TYPE_DIRECTED (1 << 2)
45#define PACKET_TYPE_BROADCAST (1 << 3)
46#define PACKET_TYPE_MULTICAST (1 << 4)
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
77 if ((pack_with_header_len) < dev->maxpacket)
78 need_tail = dev->maxpacket - pack_with_header_len + 1;
79
80
81
82
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
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
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_multicast_list = 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};
240
241static int __init int51x1_init(void)
242{
243 return usb_register(&int51x1_driver);
244}
245module_init(int51x1_init);
246
247static void __exit int51x1_exit(void)
248{
249 usb_deregister(&int51x1_driver);
250}
251module_exit(int51x1_exit);
252
253MODULE_AUTHOR("Peter Holik");
254MODULE_DESCRIPTION("Intellon usb powerline adapter");
255MODULE_LICENSE("GPL");
256
