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4510d7cb PH |
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/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 | ||
49 | static 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 | deverr(dev, "unexpected tiny rx frame"); | |
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 | ||
65 | static 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 | ||
118 | static void int51x1_async_cmd_callback(struct urb *urb) | |
119 | { | |
120 | struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; | |
121 | int status = urb->status; | |
122 | ||
123 | if (status < 0) | |
124 | dev_warn(&urb->dev->dev, "async callback failed with %d\n", status); | |
125 | ||
126 | kfree(req); | |
127 | usb_free_urb(urb); | |
128 | } | |
129 | ||
130 | static void int51x1_set_multicast(struct net_device *netdev) | |
131 | { | |
132 | struct usb_ctrlrequest *req; | |
133 | int status; | |
134 | struct urb *urb; | |
135 | struct usbnet *dev = netdev_priv(netdev); | |
136 | u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST; | |
137 | ||
138 | if (netdev->flags & IFF_PROMISC) { | |
139 | /* do not expect to see traffic of other PLCs */ | |
140 | filter |= PACKET_TYPE_PROMISCUOUS; | |
141 | devinfo(dev, "promiscuous mode enabled"); | |
142 | } else if (netdev->mc_count || | |
143 | (netdev->flags & IFF_ALLMULTI)) { | |
144 | filter |= PACKET_TYPE_ALL_MULTICAST; | |
145 | devdbg(dev, "receive all multicast enabled"); | |
146 | } else { | |
147 | /* ~PROMISCUOUS, ~MULTICAST */ | |
148 | devdbg(dev, "receive own packets only"); | |
149 | } | |
150 | ||
151 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
152 | if (!urb) { | |
153 | devwarn(dev, "Error allocating URB"); | |
154 | return; | |
155 | } | |
156 | ||
157 | req = kmalloc(sizeof(*req), GFP_ATOMIC); | |
158 | if (!req) { | |
159 | devwarn(dev, "Error allocating control msg"); | |
160 | goto out; | |
161 | } | |
162 | ||
163 | req->bRequestType = USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE; | |
164 | req->bRequest = SET_ETHERNET_PACKET_FILTER; | |
165 | req->wValue = cpu_to_le16(filter); | |
166 | req->wIndex = 0; | |
167 | req->wLength = 0; | |
168 | ||
169 | usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
170 | (void *)req, NULL, 0, | |
171 | int51x1_async_cmd_callback, | |
172 | (void *)req); | |
173 | ||
174 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
175 | if (status < 0) { | |
176 | devwarn(dev, "Error submitting control msg, sts=%d", status); | |
177 | goto out1; | |
178 | } | |
179 | return; | |
180 | out1: | |
181 | kfree(req); | |
182 | out: | |
183 | usb_free_urb(urb); | |
184 | } | |
185 | ||
186 | static const struct net_device_ops int51x1_netdev_ops = { | |
187 | .ndo_open = usbnet_open, | |
188 | .ndo_stop = usbnet_stop, | |
189 | .ndo_start_xmit = usbnet_start_xmit, | |
190 | .ndo_tx_timeout = usbnet_tx_timeout, | |
191 | .ndo_change_mtu = usbnet_change_mtu, | |
192 | .ndo_set_mac_address = eth_mac_addr, | |
193 | .ndo_validate_addr = eth_validate_addr, | |
194 | .ndo_set_multicast_list = int51x1_set_multicast, | |
195 | }; | |
196 | ||
197 | static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf) | |
198 | { | |
199 | int status = usbnet_get_ethernet_addr(dev, 3); | |
200 | ||
201 | if (status) | |
202 | return status; | |
203 | ||
204 | dev->net->hard_header_len += INT51X1_HEADER_SIZE; | |
205 | dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; | |
206 | dev->net->netdev_ops = &int51x1_netdev_ops; | |
207 | ||
208 | return usbnet_get_endpoints(dev, intf); | |
209 | } | |
210 | ||
211 | static const struct driver_info int51x1_info = { | |
212 | .description = "Intellon usb powerline adapter", | |
213 | .bind = int51x1_bind, | |
214 | .rx_fixup = int51x1_rx_fixup, | |
215 | .tx_fixup = int51x1_tx_fixup, | |
216 | .in = 1, | |
217 | .out = 2, | |
218 | .flags = FLAG_ETHER, | |
219 | }; | |
220 | ||
221 | static const struct usb_device_id products[] = { | |
222 | { | |
223 | USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID), | |
224 | .driver_info = (unsigned long) &int51x1_info, | |
225 | }, | |
226 | {}, | |
227 | }; | |
228 | MODULE_DEVICE_TABLE(usb, products); | |
229 | ||
230 | static struct usb_driver int51x1_driver = { | |
231 | .name = "int51x1", | |
232 | .id_table = products, | |
233 | .probe = usbnet_probe, | |
234 | .disconnect = usbnet_disconnect, | |
235 | .suspend = usbnet_suspend, | |
236 | .resume = usbnet_resume, | |
237 | }; | |
238 | ||
239 | static int __init int51x1_init(void) | |
240 | { | |
241 | return usb_register(&int51x1_driver); | |
242 | } | |
243 | module_init(int51x1_init); | |
244 | ||
245 | static void __exit int51x1_exit(void) | |
246 | { | |
247 | usb_deregister(&int51x1_driver); | |
248 | } | |
249 | module_exit(int51x1_exit); | |
250 | ||
251 | MODULE_AUTHOR("Peter Holik"); | |
252 | MODULE_DESCRIPTION("Intellon usb powerline adapter"); | |
253 | MODULE_LICENSE("GPL"); |