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Diffstat (limited to 'drivers/uwb/i1480/i1480u-wlp/lc.c')
-rw-r--r--drivers/uwb/i1480/i1480u-wlp/lc.c424
1 files changed, 0 insertions, 424 deletions
diff --git a/drivers/uwb/i1480/i1480u-wlp/lc.c b/drivers/uwb/i1480/i1480u-wlp/lc.c
deleted file mode 100644
index def778cf2216..000000000000
--- a/drivers/uwb/i1480/i1480u-wlp/lc.c
+++ /dev/null
@@ -1,424 +0,0 @@
1/*
2 * WUSB Wire Adapter: WLP interface
3 * Driver for the Linux Network stack.
4 *
5 * Copyright (C) 2005-2006 Intel Corporation
6 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version
10 * 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 * 02110-1301, USA.
21 *
22 *
23 * FIXME: docs
24 *
25 * This implements a very simple network driver for the WLP USB
26 * device that is associated to a UWB (Ultra Wide Band) host.
27 *
28 * This is seen as an interface of a composite device. Once the UWB
29 * host has an association to another WLP capable device, the
30 * networking interface (aka WLP) can start to send packets back and
31 * forth.
32 *
33 * Limitations:
34 *
35 * - Hand cranked; can't ifup the interface until there is an association
36 *
37 * - BW allocation very simplistic [see i1480u_mas_set() and callees].
38 *
39 *
40 * ROADMAP:
41 *
42 * ENTRY POINTS (driver model):
43 *
44 * i1480u_driver_{exit,init}(): initialization of the driver.
45 *
46 * i1480u_probe(): called by the driver code when a device
47 * matching 'i1480u_id_table' is connected.
48 *
49 * This allocs a netdev instance, inits with
50 * i1480u_add(), then registers_netdev().
51 * i1480u_init()
52 * i1480u_add()
53 *
54 * i1480u_disconnect(): device has been disconnected/module
55 * is being removed.
56 * i1480u_rm()
57 */
58#include <linux/gfp.h>
59#include <linux/if_arp.h>
60#include <linux/etherdevice.h>
61
62#include "i1480u-wlp.h"
63
64
65
66static inline
67void i1480u_init(struct i1480u *i1480u)
68{
69 /* nothing so far... doesn't it suck? */
70 spin_lock_init(&i1480u->lock);
71 INIT_LIST_HEAD(&i1480u->tx_list);
72 spin_lock_init(&i1480u->tx_list_lock);
73 wlp_options_init(&i1480u->options);
74 edc_init(&i1480u->tx_errors);
75 edc_init(&i1480u->rx_errors);
76#ifdef i1480u_FLOW_CONTROL
77 edc_init(&i1480u->notif_edc);
78#endif
79 stats_init(&i1480u->lqe_stats);
80 stats_init(&i1480u->rssi_stats);
81 wlp_init(&i1480u->wlp);
82}
83
84/**
85 * Fill WLP device information structure
86 *
87 * The structure will contain a few character arrays, each ending with a
88 * null terminated string. Each string has to fit (excluding terminating
89 * character) into a specified range obtained from the WLP substack.
90 *
91 * It is still not clear exactly how this device information should be
92 * obtained. Until we find out we use the USB device descriptor as backup, some
93 * information elements have intuitive mappings, other not.
94 */
95static
96void i1480u_fill_device_info(struct wlp *wlp, struct wlp_device_info *dev_info)
97{
98 struct i1480u *i1480u = container_of(wlp, struct i1480u, wlp);
99 struct usb_device *usb_dev = i1480u->usb_dev;
100 /* Treat device name and model name the same */
101 if (usb_dev->descriptor.iProduct) {
102 usb_string(usb_dev, usb_dev->descriptor.iProduct,
103 dev_info->name, sizeof(dev_info->name));
104 usb_string(usb_dev, usb_dev->descriptor.iProduct,
105 dev_info->model_name, sizeof(dev_info->model_name));
106 }
107 if (usb_dev->descriptor.iManufacturer)
108 usb_string(usb_dev, usb_dev->descriptor.iManufacturer,
109 dev_info->manufacturer,
110 sizeof(dev_info->manufacturer));
111 scnprintf(dev_info->model_nr, sizeof(dev_info->model_nr), "%04x",
112 __le16_to_cpu(usb_dev->descriptor.bcdDevice));
113 if (usb_dev->descriptor.iSerialNumber)
114 usb_string(usb_dev, usb_dev->descriptor.iSerialNumber,
115 dev_info->serial, sizeof(dev_info->serial));
116 /* FIXME: where should we obtain category? */
117 dev_info->prim_dev_type.category = cpu_to_le16(WLP_DEV_CAT_OTHER);
118 /* FIXME: Complete OUI and OUIsubdiv attributes */
119}
120
121#ifdef i1480u_FLOW_CONTROL
122/**
123 * Callback for the notification endpoint
124 *
125 * This mostly controls the xon/xoff protocol. In case of hard error,
126 * we stop the queue. If not, we always retry.
127 */
128static
129void i1480u_notif_cb(struct urb *urb, struct pt_regs *regs)
130{
131 struct i1480u *i1480u = urb->context;
132 struct usb_interface *usb_iface = i1480u->usb_iface;
133 struct device *dev = &usb_iface->dev;
134 int result;
135
136 switch (urb->status) {
137 case 0: /* Got valid data, do xon/xoff */
138 switch (i1480u->notif_buffer[0]) {
139 case 'N':
140 dev_err(dev, "XOFF STOPPING queue at %lu\n", jiffies);
141 netif_stop_queue(i1480u->net_dev);
142 break;
143 case 'A':
144 dev_err(dev, "XON STARTING queue at %lu\n", jiffies);
145 netif_start_queue(i1480u->net_dev);
146 break;
147 default:
148 dev_err(dev, "NEP: unknown data 0x%02hhx\n",
149 i1480u->notif_buffer[0]);
150 }
151 break;
152 case -ECONNRESET: /* Controlled situation ... */
153 case -ENOENT: /* we killed the URB... */
154 dev_err(dev, "NEP: URB reset/noent %d\n", urb->status);
155 goto error;
156 case -ESHUTDOWN: /* going away! */
157 dev_err(dev, "NEP: URB down %d\n", urb->status);
158 goto error;
159 default: /* Retry unless it gets ugly */
160 if (edc_inc(&i1480u->notif_edc, EDC_MAX_ERRORS,
161 EDC_ERROR_TIMEFRAME)) {
162 dev_err(dev, "NEP: URB max acceptable errors "
163 "exceeded; resetting device\n");
164 goto error_reset;
165 }
166 dev_err(dev, "NEP: URB error %d\n", urb->status);
167 break;
168 }
169 result = usb_submit_urb(urb, GFP_ATOMIC);
170 if (result < 0) {
171 dev_err(dev, "NEP: Can't resubmit URB: %d; resetting device\n",
172 result);
173 goto error_reset;
174 }
175 return;
176
177error_reset:
178 wlp_reset_all(&i1480-wlp);
179error:
180 netif_stop_queue(i1480u->net_dev);
181 return;
182}
183#endif
184
185static const struct net_device_ops i1480u_netdev_ops = {
186 .ndo_open = i1480u_open,
187 .ndo_stop = i1480u_stop,
188 .ndo_start_xmit = i1480u_hard_start_xmit,
189 .ndo_tx_timeout = i1480u_tx_timeout,
190 .ndo_set_config = i1480u_set_config,
191 .ndo_change_mtu = i1480u_change_mtu,
192};
193
194static
195int i1480u_add(struct i1480u *i1480u, struct usb_interface *iface)
196{
197 int result = -ENODEV;
198 struct wlp *wlp = &i1480u->wlp;
199 struct usb_device *usb_dev = interface_to_usbdev(iface);
200 struct net_device *net_dev = i1480u->net_dev;
201 struct uwb_rc *rc;
202 struct uwb_dev *uwb_dev;
203#ifdef i1480u_FLOW_CONTROL
204 struct usb_endpoint_descriptor *epd;
205#endif
206
207 i1480u->usb_dev = usb_get_dev(usb_dev);
208 i1480u->usb_iface = iface;
209 rc = uwb_rc_get_by_grandpa(&i1480u->usb_dev->dev);
210 if (rc == NULL) {
211 dev_err(&iface->dev, "Cannot get associated UWB Radio "
212 "Controller\n");
213 goto out;
214 }
215 wlp->xmit_frame = i1480u_xmit_frame;
216 wlp->fill_device_info = i1480u_fill_device_info;
217 wlp->stop_queue = i1480u_stop_queue;
218 wlp->start_queue = i1480u_start_queue;
219 result = wlp_setup(wlp, rc, net_dev);
220 if (result < 0) {
221 dev_err(&iface->dev, "Cannot setup WLP\n");
222 goto error_wlp_setup;
223 }
224 result = 0;
225 ether_setup(net_dev); /* make it an etherdevice */
226 uwb_dev = &rc->uwb_dev;
227 /* FIXME: hookup address change notifications? */
228
229 memcpy(net_dev->dev_addr, uwb_dev->mac_addr.data,
230 sizeof(net_dev->dev_addr));
231
232 net_dev->hard_header_len = sizeof(struct untd_hdr_cmp)
233 + sizeof(struct wlp_tx_hdr)
234 + WLP_DATA_HLEN
235 + ETH_HLEN;
236 net_dev->mtu = 3500;
237 net_dev->tx_queue_len = 20; /* FIXME: maybe use 1000? */
238
239/* net_dev->flags &= ~IFF_BROADCAST; FIXME: BUG in firmware */
240 /* FIXME: multicast disabled */
241 net_dev->flags &= ~IFF_MULTICAST;
242 net_dev->features &= ~NETIF_F_SG;
243 net_dev->features &= ~NETIF_F_FRAGLIST;
244 /* All NETIF_F_*_CSUM disabled */
245 net_dev->features |= NETIF_F_HIGHDMA;
246 net_dev->watchdog_timeo = 5*HZ; /* FIXME: a better default? */
247
248 net_dev->netdev_ops = &i1480u_netdev_ops;
249
250#ifdef i1480u_FLOW_CONTROL
251 /* Notification endpoint setup (submitted when we open the device) */
252 i1480u->notif_urb = usb_alloc_urb(0, GFP_KERNEL);
253 if (i1480u->notif_urb == NULL) {
254 dev_err(&iface->dev, "Unable to allocate notification URB\n");
255 result = -ENOMEM;
256 goto error_urb_alloc;
257 }
258 epd = &iface->cur_altsetting->endpoint[0].desc;
259 usb_fill_int_urb(i1480u->notif_urb, usb_dev,
260 usb_rcvintpipe(usb_dev, epd->bEndpointAddress),
261 i1480u->notif_buffer, sizeof(i1480u->notif_buffer),
262 i1480u_notif_cb, i1480u, epd->bInterval);
263
264#endif
265
266 i1480u->tx_inflight.max = i1480u_TX_INFLIGHT_MAX;
267 i1480u->tx_inflight.threshold = i1480u_TX_INFLIGHT_THRESHOLD;
268 i1480u->tx_inflight.restart_ts = jiffies;
269 usb_set_intfdata(iface, i1480u);
270 return result;
271
272#ifdef i1480u_FLOW_CONTROL
273error_urb_alloc:
274#endif
275 wlp_remove(wlp);
276error_wlp_setup:
277 uwb_rc_put(rc);
278out:
279 usb_put_dev(i1480u->usb_dev);
280 return result;
281}
282
283static void i1480u_rm(struct i1480u *i1480u)
284{
285 struct uwb_rc *rc = i1480u->wlp.rc;
286 usb_set_intfdata(i1480u->usb_iface, NULL);
287#ifdef i1480u_FLOW_CONTROL
288 usb_kill_urb(i1480u->notif_urb);
289 usb_free_urb(i1480u->notif_urb);
290#endif
291 wlp_remove(&i1480u->wlp);
292 uwb_rc_put(rc);
293 usb_put_dev(i1480u->usb_dev);
294}
295
296/** Just setup @net_dev's i1480u private data */
297static void i1480u_netdev_setup(struct net_device *net_dev)
298{
299 struct i1480u *i1480u = netdev_priv(net_dev);
300 /* Initialize @i1480u */
301 memset(i1480u, 0, sizeof(*i1480u));
302 i1480u_init(i1480u);
303}
304
305/**
306 * Probe a i1480u interface and register it
307 *
308 * @iface: USB interface to link to
309 * @id: USB class/subclass/protocol id
310 * @returns: 0 if ok, < 0 errno code on error.
311 *
312 * Does basic housekeeping stuff and then allocs a netdev with space
313 * for the i1480u data. Initializes, registers in i1480u, registers in
314 * netdev, ready to go.
315 */
316static int i1480u_probe(struct usb_interface *iface,
317 const struct usb_device_id *id)
318{
319 int result;
320 struct net_device *net_dev;
321 struct device *dev = &iface->dev;
322 struct i1480u *i1480u;
323
324 /* Allocate instance [calls i1480u_netdev_setup() on it] */
325 result = -ENOMEM;
326 net_dev = alloc_netdev(sizeof(*i1480u), "wlp%d", i1480u_netdev_setup);
327 if (net_dev == NULL) {
328 dev_err(dev, "no memory for network device instance\n");
329 goto error_alloc_netdev;
330 }
331 SET_NETDEV_DEV(net_dev, dev);
332 i1480u = netdev_priv(net_dev);
333 i1480u->net_dev = net_dev;
334 result = i1480u_add(i1480u, iface); /* Now setup all the wlp stuff */
335 if (result < 0) {
336 dev_err(dev, "cannot add i1480u device: %d\n", result);
337 goto error_i1480u_add;
338 }
339 result = register_netdev(net_dev); /* Okey dokey, bring it up */
340 if (result < 0) {
341 dev_err(dev, "cannot register network device: %d\n", result);
342 goto error_register_netdev;
343 }
344 i1480u_sysfs_setup(i1480u);
345 if (result < 0)
346 goto error_sysfs_init;
347 return 0;
348
349error_sysfs_init:
350 unregister_netdev(net_dev);
351error_register_netdev:
352 i1480u_rm(i1480u);
353error_i1480u_add:
354 free_netdev(net_dev);
355error_alloc_netdev:
356 return result;
357}
358
359
360/**
361 * Disconect a i1480u from the system.
362 *
363 * i1480u_stop() has been called before, so al the rx and tx contexts
364 * have been taken down already. Make sure the queue is stopped,
365 * unregister netdev and i1480u, free and kill.
366 */
367static void i1480u_disconnect(struct usb_interface *iface)
368{
369 struct i1480u *i1480u;
370 struct net_device *net_dev;
371
372 i1480u = usb_get_intfdata(iface);
373 net_dev = i1480u->net_dev;
374 netif_stop_queue(net_dev);
375#ifdef i1480u_FLOW_CONTROL
376 usb_kill_urb(i1480u->notif_urb);
377#endif
378 i1480u_sysfs_release(i1480u);
379 unregister_netdev(net_dev);
380 i1480u_rm(i1480u);
381 free_netdev(net_dev);
382}
383
384static struct usb_device_id i1480u_id_table[] = {
385 {
386 .match_flags = USB_DEVICE_ID_MATCH_DEVICE \
387 | USB_DEVICE_ID_MATCH_DEV_INFO \
388 | USB_DEVICE_ID_MATCH_INT_INFO,
389 .idVendor = 0x8086,
390 .idProduct = 0x0c3b,
391 .bDeviceClass = 0xef,
392 .bDeviceSubClass = 0x02,
393 .bDeviceProtocol = 0x02,
394 .bInterfaceClass = 0xff,
395 .bInterfaceSubClass = 0xff,
396 .bInterfaceProtocol = 0xff,
397 },
398 {},
399};
400MODULE_DEVICE_TABLE(usb, i1480u_id_table);
401
402static struct usb_driver i1480u_driver = {
403 .name = KBUILD_MODNAME,
404 .probe = i1480u_probe,
405 .disconnect = i1480u_disconnect,
406 .id_table = i1480u_id_table,
407};
408
409static int __init i1480u_driver_init(void)
410{
411 return usb_register(&i1480u_driver);
412}
413module_init(i1480u_driver_init);
414
415
416static void __exit i1480u_driver_exit(void)
417{
418 usb_deregister(&i1480u_driver);
419}
420module_exit(i1480u_driver_exit);
421
422MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
423MODULE_DESCRIPTION("i1480 Wireless UWB Link WLP networking for USB");
424MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 06:54:11 -0500