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authorPeter Holik <peter@holik.at>2009-04-18 03:24:21 -0400
committerDavid S. Miller <davem@davemloft.net>2009-04-21 04:55:59 -0400
commit4510d7cb8b4e7d389652b8a4f89fad469a5ecc92 (patch)
tree4bbfef372132bab1ba09b27447aa7d6667f8e0cc
parent03ad032bb78b2732b607ed198e951240e1d21e59 (diff)
usb driver for intellon int51x1 based PLC like devolo dlan duo
usb driver for intellon int51x1 based PLC like devolo dlan duo with improvements suggested by the guys of the mailinglist: - name and prefix with int51x1 (Florian Fainelli) - use conversion functions cpu_to_le16 / le16_to_cpu (Oliver Neukum) - use pskb_may_pull instead of skb->len (Ilpo Järvinen) - better code in tx_fixup (Ilpo Järvinen) - use gotos for error handling (Ilpo Järvinen) - better description (Jon Smirl) Signed-off-by: Peter Holik <peter@holik.at> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/usb/Kconfig8
-rw-r--r--drivers/net/usb/Makefile1
-rw-r--r--drivers/net/usb/int51x1.c253
3 files changed, 262 insertions, 0 deletions
diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
index 8ee21030e9ac..e00b5b1f6743 100644
--- a/drivers/net/usb/Kconfig
+++ b/drivers/net/usb/Kconfig
@@ -345,4 +345,12 @@ config USB_HSO
345 To compile this driver as a module, choose M here: the 345 To compile this driver as a module, choose M here: the
346 module will be called hso. 346 module will be called hso.
347 347
348config USB_NET_INT51X1
349 tristate "Intellon PLC based usb adapter"
350 depends on USB_USBNET
351 help
352 Choose this option if you're using a 14Mb USB-based PLC
353 (Powerline Communications) solution with an Intellon
354 INT51x1/INT5200 chip, like the "devolo dLan duo".
355
348endmenu 356endmenu
diff --git a/drivers/net/usb/Makefile b/drivers/net/usb/Makefile
index 88a87eeb376a..f4402a06e52c 100644
--- a/drivers/net/usb/Makefile
+++ b/drivers/net/usb/Makefile
@@ -19,4 +19,5 @@ obj-$(CONFIG_USB_NET_CDC_SUBSET) += cdc_subset.o
19obj-$(CONFIG_USB_NET_ZAURUS) += zaurus.o 19obj-$(CONFIG_USB_NET_ZAURUS) += zaurus.o
20obj-$(CONFIG_USB_NET_MCS7830) += mcs7830.o 20obj-$(CONFIG_USB_NET_MCS7830) += mcs7830.o
21obj-$(CONFIG_USB_USBNET) += usbnet.o 21obj-$(CONFIG_USB_USBNET) += usbnet.o
22obj-$(CONFIG_USB_NET_INT51X1) += int51x1.o
22 23
diff --git a/drivers/net/usb/int51x1.c b/drivers/net/usb/int51x1.c
new file mode 100644
index 000000000000..55cf7081de10
--- /dev/null
+++ b/drivers/net/usb/int51x1.c
@@ -0,0 +1,253 @@
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
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 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
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_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
130static 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;
180out1:
181 kfree(req);
182out:
183 usb_free_urb(urb);
184}
185
186static 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
197static 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
211static 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
221static 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};
228MODULE_DEVICE_TABLE(usb, products);
229
230static 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
239static int __init int51x1_init(void)
240{
241 return usb_register(&int51x1_driver);
242}
243module_init(int51x1_init);
244
245static void __exit int51x1_exit(void)
246{
247 usb_deregister(&int51x1_driver);
248}
249module_exit(int51x1_exit);
250
251MODULE_AUTHOR("Peter Holik");
252MODULE_DESCRIPTION("Intellon usb powerline adapter");
253MODULE_LICENSE("GPL");