cpusets: document adding/removing cpus to cpuset elaborately
[linux-2.6] / drivers / ieee802154 / fakehard.c
1 /*
2  * Sample driver for HardMAC IEEE 802.15.4 devices
3  *
4  * Copyright (C) 2009 Siemens AG
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Written by:
20  * Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
21  */
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/platform_device.h>
25 #include <linux/netdevice.h>
26 #include <linux/skbuff.h>
27 #include <linux/if_arp.h>
28
29 #include <net/ieee802154/af_ieee802154.h>
30 #include <net/ieee802154/netdevice.h>
31 #include <net/ieee802154/mac_def.h>
32 #include <net/ieee802154/nl802154.h>
33
34 static u16 fake_get_pan_id(struct net_device *dev)
35 {
36         BUG_ON(dev->type != ARPHRD_IEEE802154);
37
38         return 0xeba1;
39 }
40
41 static u16 fake_get_short_addr(struct net_device *dev)
42 {
43         BUG_ON(dev->type != ARPHRD_IEEE802154);
44
45         return 0x1;
46 }
47
48 static u8 fake_get_dsn(struct net_device *dev)
49 {
50         BUG_ON(dev->type != ARPHRD_IEEE802154);
51
52         return 0x00; /* DSN are implemented in HW, so return just 0 */
53 }
54
55 static u8 fake_get_bsn(struct net_device *dev)
56 {
57         BUG_ON(dev->type != ARPHRD_IEEE802154);
58
59         return 0x00; /* BSN are implemented in HW, so return just 0 */
60 }
61
62 static int fake_assoc_req(struct net_device *dev,
63                 struct ieee802154_addr *addr, u8 channel, u8 cap)
64 {
65         /* We simply emulate it here */
66         return ieee802154_nl_assoc_confirm(dev, fake_get_short_addr(dev),
67                         IEEE802154_SUCCESS);
68 }
69
70 static int fake_assoc_resp(struct net_device *dev,
71                 struct ieee802154_addr *addr, u16 short_addr, u8 status)
72 {
73         return 0;
74 }
75
76 static int fake_disassoc_req(struct net_device *dev,
77                 struct ieee802154_addr *addr, u8 reason)
78 {
79         return ieee802154_nl_disassoc_confirm(dev, IEEE802154_SUCCESS);
80 }
81
82 static int fake_start_req(struct net_device *dev, struct ieee802154_addr *addr,
83                                 u8 channel,
84                                 u8 bcn_ord, u8 sf_ord, u8 pan_coord, u8 blx,
85                                 u8 coord_realign)
86 {
87         return 0;
88 }
89
90 static int fake_scan_req(struct net_device *dev, u8 type, u32 channels,
91                 u8 duration)
92 {
93         u8 edl[27] = {};
94         return ieee802154_nl_scan_confirm(dev, IEEE802154_SUCCESS, type,
95                         channels,
96                         type == IEEE802154_MAC_SCAN_ED ? edl : NULL);
97 }
98
99 static struct ieee802154_mlme_ops fake_mlme = {
100         .assoc_req = fake_assoc_req,
101         .assoc_resp = fake_assoc_resp,
102         .disassoc_req = fake_disassoc_req,
103         .start_req = fake_start_req,
104         .scan_req = fake_scan_req,
105
106         .get_pan_id = fake_get_pan_id,
107         .get_short_addr = fake_get_short_addr,
108         .get_dsn = fake_get_dsn,
109         .get_bsn = fake_get_bsn,
110 };
111
112 static int ieee802154_fake_open(struct net_device *dev)
113 {
114         netif_start_queue(dev);
115         return 0;
116 }
117
118 static int ieee802154_fake_close(struct net_device *dev)
119 {
120         netif_stop_queue(dev);
121         return 0;
122 }
123
124 static int ieee802154_fake_xmit(struct sk_buff *skb, struct net_device *dev)
125 {
126         skb->iif = dev->ifindex;
127         skb->dev = dev;
128         dev->stats.tx_packets++;
129         dev->stats.tx_bytes += skb->len;
130
131         dev->trans_start = jiffies;
132
133         /* FIXME: do hardware work here ... */
134
135         return 0;
136 }
137
138
139 static int ieee802154_fake_ioctl(struct net_device *dev, struct ifreq *ifr,
140                 int cmd)
141 {
142         struct sockaddr_ieee802154 *sa =
143                 (struct sockaddr_ieee802154 *)&ifr->ifr_addr;
144         u16 pan_id, short_addr;
145
146         switch (cmd) {
147         case SIOCGIFADDR:
148                 /* FIXME: fixed here, get from device IRL */
149                 pan_id = fake_get_pan_id(dev);
150                 short_addr = fake_get_short_addr(dev);
151                 if (pan_id == IEEE802154_PANID_BROADCAST ||
152                     short_addr == IEEE802154_ADDR_BROADCAST)
153                         return -EADDRNOTAVAIL;
154
155                 sa->family = AF_IEEE802154;
156                 sa->addr.addr_type = IEEE802154_ADDR_SHORT;
157                 sa->addr.pan_id = pan_id;
158                 sa->addr.short_addr = short_addr;
159                 return 0;
160         }
161         return -ENOIOCTLCMD;
162 }
163
164 static int ieee802154_fake_mac_addr(struct net_device *dev, void *p)
165 {
166         return -EBUSY; /* HW address is built into the device */
167 }
168
169 static const struct net_device_ops fake_ops = {
170         .ndo_open               = ieee802154_fake_open,
171         .ndo_stop               = ieee802154_fake_close,
172         .ndo_start_xmit         = ieee802154_fake_xmit,
173         .ndo_do_ioctl           = ieee802154_fake_ioctl,
174         .ndo_set_mac_address    = ieee802154_fake_mac_addr,
175 };
176
177
178 static void ieee802154_fake_setup(struct net_device *dev)
179 {
180         dev->addr_len           = IEEE802154_ADDR_LEN;
181         memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
182         dev->features           = NETIF_F_NO_CSUM;
183         dev->needed_tailroom    = 2; /* FCS */
184         dev->mtu                = 127;
185         dev->tx_queue_len       = 10;
186         dev->type               = ARPHRD_IEEE802154;
187         dev->flags              = IFF_NOARP | IFF_BROADCAST;
188         dev->watchdog_timeo     = 0;
189 }
190
191
192 static int __devinit ieee802154fake_probe(struct platform_device *pdev)
193 {
194         struct net_device *dev =
195                 alloc_netdev(0, "hardwpan%d", ieee802154_fake_setup);
196         int err;
197
198         if (!dev)
199                 return -ENOMEM;
200
201         memcpy(dev->dev_addr, "\xba\xbe\xca\xfe\xde\xad\xbe\xef",
202                         dev->addr_len);
203         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
204
205         dev->netdev_ops = &fake_ops;
206         dev->ml_priv = &fake_mlme;
207
208         /*
209          * If the name is a format string the caller wants us to do a
210          * name allocation.
211          */
212         if (strchr(dev->name, '%')) {
213                 err = dev_alloc_name(dev, dev->name);
214                 if (err < 0)
215                         goto out;
216         }
217
218         SET_NETDEV_DEV(dev, &pdev->dev);
219
220         platform_set_drvdata(pdev, dev);
221
222         err = register_netdev(dev);
223         if (err < 0)
224                 goto out;
225
226
227         dev_info(&pdev->dev, "Added ieee802154 HardMAC hardware\n");
228         return 0;
229
230 out:
231         unregister_netdev(dev);
232         return err;
233 }
234
235 static int __devexit ieee802154fake_remove(struct platform_device *pdev)
236 {
237         struct net_device *dev = platform_get_drvdata(pdev);
238         unregister_netdev(dev);
239         free_netdev(dev);
240         return 0;
241 }
242
243 static struct platform_device *ieee802154fake_dev;
244
245 static struct platform_driver ieee802154fake_driver = {
246         .probe = ieee802154fake_probe,
247         .remove = __devexit_p(ieee802154fake_remove),
248         .driver = {
249                         .name = "ieee802154hardmac",
250                         .owner = THIS_MODULE,
251         },
252 };
253
254 static __init int fake_init(void)
255 {
256         ieee802154fake_dev = platform_device_register_simple(
257                         "ieee802154hardmac", -1, NULL, 0);
258         return platform_driver_register(&ieee802154fake_driver);
259 }
260
261 static __exit void fake_exit(void)
262 {
263         platform_driver_unregister(&ieee802154fake_driver);
264         platform_device_unregister(ieee802154fake_dev);
265 }
266
267 module_init(fake_init);
268 module_exit(fake_exit);
269 MODULE_LICENSE("GPL");
270