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904813cd DB |
1 | /* |
2 | * Net1080 based USB host-to-host cables | |
3 | * Copyright (C) 2000-2005 by David Brownell | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
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 | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
20 | // #define DEBUG // error path messages, extra info | |
21 | // #define VERBOSE // more; success messages | |
22 | ||
904813cd DB |
23 | #include <linux/module.h> |
24 | #include <linux/sched.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/ethtool.h> | |
29 | #include <linux/workqueue.h> | |
30 | #include <linux/mii.h> | |
31 | #include <linux/usb.h> | |
32 | ||
33 | #include <asm/unaligned.h> | |
34 | ||
35 | #include "usbnet.h" | |
36 | ||
37 | ||
38 | /* | |
39 | * Netchip 1080 driver ... http://www.netchip.com | |
40 | * (Sept 2004: End-of-life announcement has been sent.) | |
41 | * Used in (some) LapLink cables | |
42 | */ | |
43 | ||
44 | #define frame_errors data[1] | |
45 | ||
46 | /* | |
47 | * NetChip framing of ethernet packets, supporting additional error | |
48 | * checks for links that may drop bulk packets from inside messages. | |
49 | * Odd USB length == always short read for last usb packet. | |
50 | * - nc_header | |
51 | * - Ethernet header (14 bytes) | |
52 | * - payload | |
53 | * - (optional padding byte, if needed so length becomes odd) | |
54 | * - nc_trailer | |
55 | * | |
56 | * This framing is to be avoided for non-NetChip devices. | |
57 | */ | |
58 | ||
59 | struct nc_header { // packed: | |
60 | __le16 hdr_len; // sizeof nc_header (LE, all) | |
61 | __le16 packet_len; // payload size (including ethhdr) | |
62 | __le16 packet_id; // detects dropped packets | |
63 | #define MIN_HEADER 6 | |
64 | ||
65 | // all else is optional, and must start with: | |
66 | // __le16 vendorId; // from usb-if | |
67 | // __le16 productId; | |
68 | } __attribute__((__packed__)); | |
69 | ||
70 | #define PAD_BYTE ((unsigned char)0xAC) | |
71 | ||
72 | struct nc_trailer { | |
73 | __le16 packet_id; | |
74 | } __attribute__((__packed__)); | |
75 | ||
76 | // packets may use FLAG_FRAMING_NC and optional pad | |
77 | #define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \ | |
78 | + sizeof (struct ethhdr) \ | |
79 | + (mtu) \ | |
80 | + 1 \ | |
81 | + sizeof (struct nc_trailer)) | |
82 | ||
83 | #define MIN_FRAMED FRAMED_SIZE(0) | |
84 | ||
85 | /* packets _could_ be up to 64KB... */ | |
86 | #define NC_MAX_PACKET 32767 | |
87 | ||
88 | ||
89 | /* | |
90 | * Zero means no timeout; else, how long a 64 byte bulk packet may be queued | |
91 | * before the hardware drops it. If that's done, the driver will need to | |
92 | * frame network packets to guard against the dropped USB packets. The win32 | |
93 | * driver sets this for both sides of the link. | |
94 | */ | |
95 | #define NC_READ_TTL_MS ((u8)255) // ms | |
96 | ||
97 | /* | |
98 | * We ignore most registers and EEPROM contents. | |
99 | */ | |
100 | #define REG_USBCTL ((u8)0x04) | |
101 | #define REG_TTL ((u8)0x10) | |
102 | #define REG_STATUS ((u8)0x11) | |
103 | ||
104 | /* | |
105 | * Vendor specific requests to read/write data | |
106 | */ | |
107 | #define REQUEST_REGISTER ((u8)0x10) | |
108 | #define REQUEST_EEPROM ((u8)0x11) | |
109 | ||
110 | static int | |
111 | nc_vendor_read(struct usbnet *dev, u8 req, u8 regnum, u16 *retval_ptr) | |
112 | { | |
113 | int status = usb_control_msg(dev->udev, | |
114 | usb_rcvctrlpipe(dev->udev, 0), | |
115 | req, | |
116 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
117 | 0, regnum, | |
118 | retval_ptr, sizeof *retval_ptr, | |
119 | USB_CTRL_GET_TIMEOUT); | |
120 | if (status > 0) | |
121 | status = 0; | |
122 | if (!status) | |
123 | le16_to_cpus(retval_ptr); | |
124 | return status; | |
125 | } | |
126 | ||
127 | static inline int | |
128 | nc_register_read(struct usbnet *dev, u8 regnum, u16 *retval_ptr) | |
129 | { | |
130 | return nc_vendor_read(dev, REQUEST_REGISTER, regnum, retval_ptr); | |
131 | } | |
132 | ||
133 | // no retval ... can become async, usable in_interrupt() | |
134 | static void | |
135 | nc_vendor_write(struct usbnet *dev, u8 req, u8 regnum, u16 value) | |
136 | { | |
137 | usb_control_msg(dev->udev, | |
138 | usb_sndctrlpipe(dev->udev, 0), | |
139 | req, | |
140 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
141 | value, regnum, | |
142 | NULL, 0, // data is in setup packet | |
143 | USB_CTRL_SET_TIMEOUT); | |
144 | } | |
145 | ||
146 | static inline void | |
147 | nc_register_write(struct usbnet *dev, u8 regnum, u16 value) | |
148 | { | |
149 | nc_vendor_write(dev, REQUEST_REGISTER, regnum, value); | |
150 | } | |
151 | ||
152 | ||
153 | #if 0 | |
154 | static void nc_dump_registers(struct usbnet *dev) | |
155 | { | |
156 | u8 reg; | |
157 | u16 *vp = kmalloc(sizeof (u16)); | |
158 | ||
159 | if (!vp) { | |
160 | dbg("no memory?"); | |
161 | return; | |
162 | } | |
163 | ||
164 | dbg("%s registers:", dev->net->name); | |
165 | for (reg = 0; reg < 0x20; reg++) { | |
166 | int retval; | |
167 | ||
168 | // reading some registers is trouble | |
169 | if (reg >= 0x08 && reg <= 0xf) | |
170 | continue; | |
171 | if (reg >= 0x12 && reg <= 0x1e) | |
172 | continue; | |
173 | ||
174 | retval = nc_register_read(dev, reg, vp); | |
175 | if (retval < 0) | |
176 | dbg("%s reg [0x%x] ==> error %d", | |
177 | dev->net->name, reg, retval); | |
178 | else | |
179 | dbg("%s reg [0x%x] = 0x%x", | |
180 | dev->net->name, reg, *vp); | |
181 | } | |
182 | kfree(vp); | |
183 | } | |
184 | #endif | |
185 | ||
186 | ||
187 | /*-------------------------------------------------------------------------*/ | |
188 | ||
189 | /* | |
190 | * Control register | |
191 | */ | |
192 | ||
193 | #define USBCTL_WRITABLE_MASK 0x1f0f | |
194 | // bits 15-13 reserved, r/o | |
195 | #define USBCTL_ENABLE_LANG (1 << 12) | |
196 | #define USBCTL_ENABLE_MFGR (1 << 11) | |
197 | #define USBCTL_ENABLE_PROD (1 << 10) | |
198 | #define USBCTL_ENABLE_SERIAL (1 << 9) | |
199 | #define USBCTL_ENABLE_DEFAULTS (1 << 8) | |
200 | // bits 7-4 reserved, r/o | |
201 | #define USBCTL_FLUSH_OTHER (1 << 3) | |
202 | #define USBCTL_FLUSH_THIS (1 << 2) | |
203 | #define USBCTL_DISCONN_OTHER (1 << 1) | |
204 | #define USBCTL_DISCONN_THIS (1 << 0) | |
205 | ||
206 | static inline void nc_dump_usbctl(struct usbnet *dev, u16 usbctl) | |
207 | { | |
208 | if (!netif_msg_link(dev)) | |
209 | return; | |
210 | devdbg(dev, "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s;" | |
211 | " this%s%s;" | |
212 | " other%s%s; r/o 0x%x", | |
213 | dev->udev->bus->bus_name, dev->udev->devpath, | |
214 | usbctl, | |
215 | (usbctl & USBCTL_ENABLE_LANG) ? " lang" : "", | |
216 | (usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "", | |
217 | (usbctl & USBCTL_ENABLE_PROD) ? " prod" : "", | |
218 | (usbctl & USBCTL_ENABLE_SERIAL) ? " serial" : "", | |
219 | (usbctl & USBCTL_ENABLE_DEFAULTS) ? " defaults" : "", | |
220 | ||
221 | (usbctl & USBCTL_FLUSH_OTHER) ? " FLUSH" : "", | |
222 | (usbctl & USBCTL_DISCONN_OTHER) ? " DIS" : "", | |
223 | (usbctl & USBCTL_FLUSH_THIS) ? " FLUSH" : "", | |
224 | (usbctl & USBCTL_DISCONN_THIS) ? " DIS" : "", | |
225 | usbctl & ~USBCTL_WRITABLE_MASK | |
226 | ); | |
227 | } | |
228 | ||
229 | /*-------------------------------------------------------------------------*/ | |
230 | ||
231 | /* | |
232 | * Status register | |
233 | */ | |
234 | ||
235 | #define STATUS_PORT_A (1 << 15) | |
236 | ||
237 | #define STATUS_CONN_OTHER (1 << 14) | |
238 | #define STATUS_SUSPEND_OTHER (1 << 13) | |
239 | #define STATUS_MAILBOX_OTHER (1 << 12) | |
240 | #define STATUS_PACKETS_OTHER(n) (((n) >> 8) && 0x03) | |
241 | ||
242 | #define STATUS_CONN_THIS (1 << 6) | |
243 | #define STATUS_SUSPEND_THIS (1 << 5) | |
244 | #define STATUS_MAILBOX_THIS (1 << 4) | |
245 | #define STATUS_PACKETS_THIS(n) (((n) >> 0) && 0x03) | |
246 | ||
247 | #define STATUS_UNSPEC_MASK 0x0c8c | |
248 | #define STATUS_NOISE_MASK ((u16)~(0x0303|STATUS_UNSPEC_MASK)) | |
249 | ||
250 | ||
251 | static inline void nc_dump_status(struct usbnet *dev, u16 status) | |
252 | { | |
253 | if (!netif_msg_link(dev)) | |
254 | return; | |
255 | devdbg(dev, "net1080 %s-%s status 0x%x:" | |
256 | " this (%c) PKT=%d%s%s%s;" | |
257 | " other PKT=%d%s%s%s; unspec 0x%x", | |
258 | dev->udev->bus->bus_name, dev->udev->devpath, | |
259 | status, | |
260 | ||
261 | // XXX the packet counts don't seem right | |
262 | // (1 at reset, not 0); maybe UNSPEC too | |
263 | ||
264 | (status & STATUS_PORT_A) ? 'A' : 'B', | |
265 | STATUS_PACKETS_THIS(status), | |
266 | (status & STATUS_CONN_THIS) ? " CON" : "", | |
267 | (status & STATUS_SUSPEND_THIS) ? " SUS" : "", | |
268 | (status & STATUS_MAILBOX_THIS) ? " MBOX" : "", | |
269 | ||
270 | STATUS_PACKETS_OTHER(status), | |
271 | (status & STATUS_CONN_OTHER) ? " CON" : "", | |
272 | (status & STATUS_SUSPEND_OTHER) ? " SUS" : "", | |
273 | (status & STATUS_MAILBOX_OTHER) ? " MBOX" : "", | |
274 | ||
275 | status & STATUS_UNSPEC_MASK | |
276 | ); | |
277 | } | |
278 | ||
279 | /*-------------------------------------------------------------------------*/ | |
280 | ||
281 | /* | |
282 | * TTL register | |
283 | */ | |
284 | ||
285 | #define TTL_THIS(ttl) (0x00ff & ttl) | |
286 | #define TTL_OTHER(ttl) (0x00ff & (ttl >> 8)) | |
287 | #define MK_TTL(this,other) ((u16)(((other)<<8)|(0x00ff&(this)))) | |
288 | ||
289 | static inline void nc_dump_ttl(struct usbnet *dev, u16 ttl) | |
290 | { | |
291 | if (netif_msg_link(dev)) | |
292 | devdbg(dev, "net1080 %s-%s ttl 0x%x this = %d, other = %d", | |
293 | dev->udev->bus->bus_name, dev->udev->devpath, | |
294 | ttl, TTL_THIS(ttl), TTL_OTHER(ttl)); | |
295 | } | |
296 | ||
297 | /*-------------------------------------------------------------------------*/ | |
298 | ||
299 | static int net1080_reset(struct usbnet *dev) | |
300 | { | |
301 | u16 usbctl, status, ttl; | |
302 | u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL); | |
303 | int retval; | |
304 | ||
305 | if (!vp) | |
306 | return -ENOMEM; | |
307 | ||
308 | // nc_dump_registers(dev); | |
309 | ||
310 | if ((retval = nc_register_read(dev, REG_STATUS, vp)) < 0) { | |
311 | dbg("can't read %s-%s status: %d", | |
312 | dev->udev->bus->bus_name, dev->udev->devpath, retval); | |
313 | goto done; | |
314 | } | |
315 | status = *vp; | |
316 | nc_dump_status(dev, status); | |
317 | ||
318 | if ((retval = nc_register_read(dev, REG_USBCTL, vp)) < 0) { | |
319 | dbg("can't read USBCTL, %d", retval); | |
320 | goto done; | |
321 | } | |
322 | usbctl = *vp; | |
323 | nc_dump_usbctl(dev, usbctl); | |
324 | ||
325 | nc_register_write(dev, REG_USBCTL, | |
326 | USBCTL_FLUSH_THIS | USBCTL_FLUSH_OTHER); | |
327 | ||
328 | if ((retval = nc_register_read(dev, REG_TTL, vp)) < 0) { | |
329 | dbg("can't read TTL, %d", retval); | |
330 | goto done; | |
331 | } | |
332 | ttl = *vp; | |
333 | // nc_dump_ttl(dev, ttl); | |
334 | ||
335 | nc_register_write(dev, REG_TTL, | |
336 | MK_TTL(NC_READ_TTL_MS, TTL_OTHER(ttl)) ); | |
337 | dbg("%s: assigned TTL, %d ms", dev->net->name, NC_READ_TTL_MS); | |
338 | ||
339 | if (netif_msg_link(dev)) | |
340 | devinfo(dev, "port %c, peer %sconnected", | |
341 | (status & STATUS_PORT_A) ? 'A' : 'B', | |
342 | (status & STATUS_CONN_OTHER) ? "" : "dis" | |
343 | ); | |
344 | retval = 0; | |
345 | ||
346 | done: | |
347 | kfree(vp); | |
348 | return retval; | |
349 | } | |
350 | ||
351 | static int net1080_check_connect(struct usbnet *dev) | |
352 | { | |
353 | int retval; | |
354 | u16 status; | |
355 | u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL); | |
356 | ||
357 | if (!vp) | |
358 | return -ENOMEM; | |
359 | retval = nc_register_read(dev, REG_STATUS, vp); | |
360 | status = *vp; | |
361 | kfree(vp); | |
362 | if (retval != 0) { | |
363 | dbg("%s net1080_check_conn read - %d", dev->net->name, retval); | |
364 | return retval; | |
365 | } | |
366 | if ((status & STATUS_CONN_OTHER) != STATUS_CONN_OTHER) | |
367 | return -ENOLINK; | |
368 | return 0; | |
369 | } | |
370 | ||
7d12e780 | 371 | static void nc_flush_complete(struct urb *urb) |
904813cd DB |
372 | { |
373 | kfree(urb->context); | |
374 | usb_free_urb(urb); | |
375 | } | |
376 | ||
377 | static void nc_ensure_sync(struct usbnet *dev) | |
378 | { | |
379 | dev->frame_errors++; | |
380 | if (dev->frame_errors > 5) { | |
381 | struct urb *urb; | |
382 | struct usb_ctrlrequest *req; | |
383 | int status; | |
384 | ||
385 | /* Send a flush */ | |
386 | urb = usb_alloc_urb(0, SLAB_ATOMIC); | |
387 | if (!urb) | |
388 | return; | |
389 | ||
390 | req = kmalloc(sizeof *req, GFP_ATOMIC); | |
391 | if (!req) { | |
392 | usb_free_urb(urb); | |
393 | return; | |
394 | } | |
395 | ||
396 | req->bRequestType = USB_DIR_OUT | |
397 | | USB_TYPE_VENDOR | |
398 | | USB_RECIP_DEVICE; | |
399 | req->bRequest = REQUEST_REGISTER; | |
400 | req->wValue = cpu_to_le16(USBCTL_FLUSH_THIS | |
401 | | USBCTL_FLUSH_OTHER); | |
402 | req->wIndex = cpu_to_le16(REG_USBCTL); | |
403 | req->wLength = cpu_to_le16(0); | |
404 | ||
405 | /* queue an async control request, we don't need | |
406 | * to do anything when it finishes except clean up. | |
407 | */ | |
408 | usb_fill_control_urb(urb, dev->udev, | |
409 | usb_sndctrlpipe(dev->udev, 0), | |
410 | (unsigned char *) req, | |
411 | NULL, 0, | |
412 | nc_flush_complete, req); | |
413 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
414 | if (status) { | |
415 | kfree(req); | |
416 | usb_free_urb(urb); | |
417 | return; | |
418 | } | |
419 | ||
420 | if (netif_msg_rx_err(dev)) | |
421 | devdbg(dev, "flush net1080; too many framing errors"); | |
422 | dev->frame_errors = 0; | |
423 | } | |
424 | } | |
425 | ||
426 | static int net1080_rx_fixup(struct usbnet *dev, struct sk_buff *skb) | |
427 | { | |
428 | struct nc_header *header; | |
429 | struct nc_trailer *trailer; | |
430 | u16 hdr_len, packet_len; | |
431 | ||
432 | if (!(skb->len & 0x01)) { | |
433 | #ifdef DEBUG | |
434 | struct net_device *net = dev->net; | |
435 | dbg("rx framesize %d range %d..%d mtu %d", skb->len, | |
436 | net->hard_header_len, dev->hard_mtu, net->mtu); | |
437 | #endif | |
438 | dev->stats.rx_frame_errors++; | |
439 | nc_ensure_sync(dev); | |
440 | return 0; | |
441 | } | |
442 | ||
443 | header = (struct nc_header *) skb->data; | |
444 | hdr_len = le16_to_cpup(&header->hdr_len); | |
445 | packet_len = le16_to_cpup(&header->packet_len); | |
446 | if (FRAMED_SIZE(packet_len) > NC_MAX_PACKET) { | |
447 | dev->stats.rx_frame_errors++; | |
448 | dbg("packet too big, %d", packet_len); | |
449 | nc_ensure_sync(dev); | |
450 | return 0; | |
451 | } else if (hdr_len < MIN_HEADER) { | |
452 | dev->stats.rx_frame_errors++; | |
453 | dbg("header too short, %d", hdr_len); | |
454 | nc_ensure_sync(dev); | |
455 | return 0; | |
456 | } else if (hdr_len > MIN_HEADER) { | |
457 | // out of band data for us? | |
458 | dbg("header OOB, %d bytes", hdr_len - MIN_HEADER); | |
459 | nc_ensure_sync(dev); | |
460 | // switch (vendor/product ids) { ... } | |
461 | } | |
462 | skb_pull(skb, hdr_len); | |
463 | ||
464 | trailer = (struct nc_trailer *) | |
465 | (skb->data + skb->len - sizeof *trailer); | |
466 | skb_trim(skb, skb->len - sizeof *trailer); | |
467 | ||
468 | if ((packet_len & 0x01) == 0) { | |
469 | if (skb->data [packet_len] != PAD_BYTE) { | |
470 | dev->stats.rx_frame_errors++; | |
471 | dbg("bad pad"); | |
472 | return 0; | |
473 | } | |
474 | skb_trim(skb, skb->len - 1); | |
475 | } | |
476 | if (skb->len != packet_len) { | |
477 | dev->stats.rx_frame_errors++; | |
478 | dbg("bad packet len %d (expected %d)", | |
479 | skb->len, packet_len); | |
480 | nc_ensure_sync(dev); | |
481 | return 0; | |
482 | } | |
483 | if (header->packet_id != get_unaligned(&trailer->packet_id)) { | |
484 | dev->stats.rx_fifo_errors++; | |
485 | dbg("(2+ dropped) rx packet_id mismatch 0x%x 0x%x", | |
486 | le16_to_cpu(header->packet_id), | |
487 | le16_to_cpu(trailer->packet_id)); | |
488 | return 0; | |
489 | } | |
490 | #if 0 | |
491 | devdbg(dev, "frame <rx h %d p %d id %d", header->hdr_len, | |
492 | header->packet_len, header->packet_id); | |
493 | #endif | |
494 | dev->frame_errors = 0; | |
495 | return 1; | |
496 | } | |
497 | ||
498 | static struct sk_buff * | |
55016f10 | 499 | net1080_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
904813cd | 500 | { |
904813cd DB |
501 | struct sk_buff *skb2; |
502 | struct nc_header *header = NULL; | |
503 | struct nc_trailer *trailer = NULL; | |
9bcbcf4d | 504 | int padlen = sizeof (struct nc_trailer); |
904813cd DB |
505 | int len = skb->len; |
506 | ||
9bcbcf4d | 507 | if (!((len + padlen + sizeof (struct nc_header)) & 0x01)) |
508 | padlen++; | |
904813cd DB |
509 | if (!skb_cloned(skb)) { |
510 | int headroom = skb_headroom(skb); | |
511 | int tailroom = skb_tailroom(skb); | |
512 | ||
9bcbcf4d | 513 | if (padlen <= tailroom && |
514 | sizeof(struct nc_header) <= headroom) | |
904813cd DB |
515 | /* There's enough head and tail room */ |
516 | goto encapsulate; | |
517 | ||
9bcbcf4d | 518 | if ((sizeof (struct nc_header) + padlen) < |
904813cd DB |
519 | (headroom + tailroom)) { |
520 | /* There's enough total room, so just readjust */ | |
521 | skb->data = memmove(skb->head | |
522 | + sizeof (struct nc_header), | |
523 | skb->data, skb->len); | |
524 | skb->tail = skb->data + len; | |
525 | goto encapsulate; | |
526 | } | |
527 | } | |
528 | ||
529 | /* Create a new skb to use with the correct size */ | |
530 | skb2 = skb_copy_expand(skb, | |
531 | sizeof (struct nc_header), | |
9bcbcf4d | 532 | padlen, |
904813cd DB |
533 | flags); |
534 | dev_kfree_skb_any(skb); | |
535 | if (!skb2) | |
536 | return skb2; | |
537 | skb = skb2; | |
538 | ||
539 | encapsulate: | |
540 | /* header first */ | |
541 | header = (struct nc_header *) skb_push(skb, sizeof *header); | |
542 | header->hdr_len = cpu_to_le16(sizeof (*header)); | |
543 | header->packet_len = cpu_to_le16(len); | |
544 | header->packet_id = cpu_to_le16((u16)dev->xid++); | |
545 | ||
546 | /* maybe pad; then trailer */ | |
547 | if (!((skb->len + sizeof *trailer) & 0x01)) | |
548 | *skb_put(skb, 1) = PAD_BYTE; | |
549 | trailer = (struct nc_trailer *) skb_put(skb, sizeof *trailer); | |
550 | put_unaligned(header->packet_id, &trailer->packet_id); | |
551 | #if 0 | |
552 | devdbg(dev, "frame >tx h %d p %d id %d", | |
553 | header->hdr_len, header->packet_len, | |
554 | header->packet_id); | |
555 | #endif | |
556 | return skb; | |
557 | } | |
558 | ||
559 | static int net1080_bind(struct usbnet *dev, struct usb_interface *intf) | |
560 | { | |
561 | unsigned extra = sizeof (struct nc_header) | |
562 | + 1 | |
563 | + sizeof (struct nc_trailer); | |
564 | ||
565 | dev->net->hard_header_len += extra; | |
566 | dev->rx_urb_size = dev->net->hard_header_len + dev->net->mtu; | |
567 | dev->hard_mtu = NC_MAX_PACKET; | |
568 | return usbnet_get_endpoints (dev, intf); | |
569 | } | |
570 | ||
571 | static const struct driver_info net1080_info = { | |
572 | .description = "NetChip TurboCONNECT", | |
573 | .flags = FLAG_FRAMING_NC, | |
574 | .bind = net1080_bind, | |
575 | .reset = net1080_reset, | |
576 | .check_connect = net1080_check_connect, | |
577 | .rx_fixup = net1080_rx_fixup, | |
578 | .tx_fixup = net1080_tx_fixup, | |
579 | }; | |
580 | ||
581 | static const struct usb_device_id products [] = { | |
582 | { | |
583 | USB_DEVICE(0x0525, 0x1080), // NetChip ref design | |
584 | .driver_info = (unsigned long) &net1080_info, | |
585 | }, { | |
586 | USB_DEVICE(0x06D0, 0x0622), // Laplink Gold | |
587 | .driver_info = (unsigned long) &net1080_info, | |
588 | }, | |
589 | { }, // END | |
590 | }; | |
591 | MODULE_DEVICE_TABLE(usb, products); | |
592 | ||
593 | static struct usb_driver net1080_driver = { | |
904813cd DB |
594 | .name = "net1080", |
595 | .id_table = products, | |
596 | .probe = usbnet_probe, | |
597 | .disconnect = usbnet_disconnect, | |
598 | .suspend = usbnet_suspend, | |
599 | .resume = usbnet_resume, | |
600 | }; | |
601 | ||
602 | static int __init net1080_init(void) | |
603 | { | |
604 | return usb_register(&net1080_driver); | |
605 | } | |
606 | module_init(net1080_init); | |
607 | ||
608 | static void __exit net1080_exit(void) | |
609 | { | |
610 | usb_deregister(&net1080_driver); | |
611 | } | |
612 | module_exit(net1080_exit); | |
613 | ||
614 | MODULE_AUTHOR("David Brownell"); | |
615 | MODULE_DESCRIPTION("NetChip 1080 based USB Host-to-Host Links"); | |
616 | MODULE_LICENSE("GPL"); |