Commit | Line | Data |
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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 | ||
23 | #include <linux/config.h> | |
24 | #ifdef CONFIG_USB_DEBUG | |
25 | # define DEBUG | |
26 | #endif | |
27 | #include <linux/module.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/ethtool.h> | |
33 | #include <linux/workqueue.h> | |
34 | #include <linux/mii.h> | |
35 | #include <linux/usb.h> | |
36 | ||
37 | #include <asm/unaligned.h> | |
38 | ||
39 | #include "usbnet.h" | |
40 | ||
41 | ||
42 | /* | |
43 | * Netchip 1080 driver ... http://www.netchip.com | |
44 | * (Sept 2004: End-of-life announcement has been sent.) | |
45 | * Used in (some) LapLink cables | |
46 | */ | |
47 | ||
48 | #define frame_errors data[1] | |
49 | ||
50 | /* | |
51 | * NetChip framing of ethernet packets, supporting additional error | |
52 | * checks for links that may drop bulk packets from inside messages. | |
53 | * Odd USB length == always short read for last usb packet. | |
54 | * - nc_header | |
55 | * - Ethernet header (14 bytes) | |
56 | * - payload | |
57 | * - (optional padding byte, if needed so length becomes odd) | |
58 | * - nc_trailer | |
59 | * | |
60 | * This framing is to be avoided for non-NetChip devices. | |
61 | */ | |
62 | ||
63 | struct nc_header { // packed: | |
64 | __le16 hdr_len; // sizeof nc_header (LE, all) | |
65 | __le16 packet_len; // payload size (including ethhdr) | |
66 | __le16 packet_id; // detects dropped packets | |
67 | #define MIN_HEADER 6 | |
68 | ||
69 | // all else is optional, and must start with: | |
70 | // __le16 vendorId; // from usb-if | |
71 | // __le16 productId; | |
72 | } __attribute__((__packed__)); | |
73 | ||
74 | #define PAD_BYTE ((unsigned char)0xAC) | |
75 | ||
76 | struct nc_trailer { | |
77 | __le16 packet_id; | |
78 | } __attribute__((__packed__)); | |
79 | ||
80 | // packets may use FLAG_FRAMING_NC and optional pad | |
81 | #define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \ | |
82 | + sizeof (struct ethhdr) \ | |
83 | + (mtu) \ | |
84 | + 1 \ | |
85 | + sizeof (struct nc_trailer)) | |
86 | ||
87 | #define MIN_FRAMED FRAMED_SIZE(0) | |
88 | ||
89 | /* packets _could_ be up to 64KB... */ | |
90 | #define NC_MAX_PACKET 32767 | |
91 | ||
92 | ||
93 | /* | |
94 | * Zero means no timeout; else, how long a 64 byte bulk packet may be queued | |
95 | * before the hardware drops it. If that's done, the driver will need to | |
96 | * frame network packets to guard against the dropped USB packets. The win32 | |
97 | * driver sets this for both sides of the link. | |
98 | */ | |
99 | #define NC_READ_TTL_MS ((u8)255) // ms | |
100 | ||
101 | /* | |
102 | * We ignore most registers and EEPROM contents. | |
103 | */ | |
104 | #define REG_USBCTL ((u8)0x04) | |
105 | #define REG_TTL ((u8)0x10) | |
106 | #define REG_STATUS ((u8)0x11) | |
107 | ||
108 | /* | |
109 | * Vendor specific requests to read/write data | |
110 | */ | |
111 | #define REQUEST_REGISTER ((u8)0x10) | |
112 | #define REQUEST_EEPROM ((u8)0x11) | |
113 | ||
114 | static int | |
115 | nc_vendor_read(struct usbnet *dev, u8 req, u8 regnum, u16 *retval_ptr) | |
116 | { | |
117 | int status = usb_control_msg(dev->udev, | |
118 | usb_rcvctrlpipe(dev->udev, 0), | |
119 | req, | |
120 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
121 | 0, regnum, | |
122 | retval_ptr, sizeof *retval_ptr, | |
123 | USB_CTRL_GET_TIMEOUT); | |
124 | if (status > 0) | |
125 | status = 0; | |
126 | if (!status) | |
127 | le16_to_cpus(retval_ptr); | |
128 | return status; | |
129 | } | |
130 | ||
131 | static inline int | |
132 | nc_register_read(struct usbnet *dev, u8 regnum, u16 *retval_ptr) | |
133 | { | |
134 | return nc_vendor_read(dev, REQUEST_REGISTER, regnum, retval_ptr); | |
135 | } | |
136 | ||
137 | // no retval ... can become async, usable in_interrupt() | |
138 | static void | |
139 | nc_vendor_write(struct usbnet *dev, u8 req, u8 regnum, u16 value) | |
140 | { | |
141 | usb_control_msg(dev->udev, | |
142 | usb_sndctrlpipe(dev->udev, 0), | |
143 | req, | |
144 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
145 | value, regnum, | |
146 | NULL, 0, // data is in setup packet | |
147 | USB_CTRL_SET_TIMEOUT); | |
148 | } | |
149 | ||
150 | static inline void | |
151 | nc_register_write(struct usbnet *dev, u8 regnum, u16 value) | |
152 | { | |
153 | nc_vendor_write(dev, REQUEST_REGISTER, regnum, value); | |
154 | } | |
155 | ||
156 | ||
157 | #if 0 | |
158 | static void nc_dump_registers(struct usbnet *dev) | |
159 | { | |
160 | u8 reg; | |
161 | u16 *vp = kmalloc(sizeof (u16)); | |
162 | ||
163 | if (!vp) { | |
164 | dbg("no memory?"); | |
165 | return; | |
166 | } | |
167 | ||
168 | dbg("%s registers:", dev->net->name); | |
169 | for (reg = 0; reg < 0x20; reg++) { | |
170 | int retval; | |
171 | ||
172 | // reading some registers is trouble | |
173 | if (reg >= 0x08 && reg <= 0xf) | |
174 | continue; | |
175 | if (reg >= 0x12 && reg <= 0x1e) | |
176 | continue; | |
177 | ||
178 | retval = nc_register_read(dev, reg, vp); | |
179 | if (retval < 0) | |
180 | dbg("%s reg [0x%x] ==> error %d", | |
181 | dev->net->name, reg, retval); | |
182 | else | |
183 | dbg("%s reg [0x%x] = 0x%x", | |
184 | dev->net->name, reg, *vp); | |
185 | } | |
186 | kfree(vp); | |
187 | } | |
188 | #endif | |
189 | ||
190 | ||
191 | /*-------------------------------------------------------------------------*/ | |
192 | ||
193 | /* | |
194 | * Control register | |
195 | */ | |
196 | ||
197 | #define USBCTL_WRITABLE_MASK 0x1f0f | |
198 | // bits 15-13 reserved, r/o | |
199 | #define USBCTL_ENABLE_LANG (1 << 12) | |
200 | #define USBCTL_ENABLE_MFGR (1 << 11) | |
201 | #define USBCTL_ENABLE_PROD (1 << 10) | |
202 | #define USBCTL_ENABLE_SERIAL (1 << 9) | |
203 | #define USBCTL_ENABLE_DEFAULTS (1 << 8) | |
204 | // bits 7-4 reserved, r/o | |
205 | #define USBCTL_FLUSH_OTHER (1 << 3) | |
206 | #define USBCTL_FLUSH_THIS (1 << 2) | |
207 | #define USBCTL_DISCONN_OTHER (1 << 1) | |
208 | #define USBCTL_DISCONN_THIS (1 << 0) | |
209 | ||
210 | static inline void nc_dump_usbctl(struct usbnet *dev, u16 usbctl) | |
211 | { | |
212 | if (!netif_msg_link(dev)) | |
213 | return; | |
214 | devdbg(dev, "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s;" | |
215 | " this%s%s;" | |
216 | " other%s%s; r/o 0x%x", | |
217 | dev->udev->bus->bus_name, dev->udev->devpath, | |
218 | usbctl, | |
219 | (usbctl & USBCTL_ENABLE_LANG) ? " lang" : "", | |
220 | (usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "", | |
221 | (usbctl & USBCTL_ENABLE_PROD) ? " prod" : "", | |
222 | (usbctl & USBCTL_ENABLE_SERIAL) ? " serial" : "", | |
223 | (usbctl & USBCTL_ENABLE_DEFAULTS) ? " defaults" : "", | |
224 | ||
225 | (usbctl & USBCTL_FLUSH_OTHER) ? " FLUSH" : "", | |
226 | (usbctl & USBCTL_DISCONN_OTHER) ? " DIS" : "", | |
227 | (usbctl & USBCTL_FLUSH_THIS) ? " FLUSH" : "", | |
228 | (usbctl & USBCTL_DISCONN_THIS) ? " DIS" : "", | |
229 | usbctl & ~USBCTL_WRITABLE_MASK | |
230 | ); | |
231 | } | |
232 | ||
233 | /*-------------------------------------------------------------------------*/ | |
234 | ||
235 | /* | |
236 | * Status register | |
237 | */ | |
238 | ||
239 | #define STATUS_PORT_A (1 << 15) | |
240 | ||
241 | #define STATUS_CONN_OTHER (1 << 14) | |
242 | #define STATUS_SUSPEND_OTHER (1 << 13) | |
243 | #define STATUS_MAILBOX_OTHER (1 << 12) | |
244 | #define STATUS_PACKETS_OTHER(n) (((n) >> 8) && 0x03) | |
245 | ||
246 | #define STATUS_CONN_THIS (1 << 6) | |
247 | #define STATUS_SUSPEND_THIS (1 << 5) | |
248 | #define STATUS_MAILBOX_THIS (1 << 4) | |
249 | #define STATUS_PACKETS_THIS(n) (((n) >> 0) && 0x03) | |
250 | ||
251 | #define STATUS_UNSPEC_MASK 0x0c8c | |
252 | #define STATUS_NOISE_MASK ((u16)~(0x0303|STATUS_UNSPEC_MASK)) | |
253 | ||
254 | ||
255 | static inline void nc_dump_status(struct usbnet *dev, u16 status) | |
256 | { | |
257 | if (!netif_msg_link(dev)) | |
258 | return; | |
259 | devdbg(dev, "net1080 %s-%s status 0x%x:" | |
260 | " this (%c) PKT=%d%s%s%s;" | |
261 | " other PKT=%d%s%s%s; unspec 0x%x", | |
262 | dev->udev->bus->bus_name, dev->udev->devpath, | |
263 | status, | |
264 | ||
265 | // XXX the packet counts don't seem right | |
266 | // (1 at reset, not 0); maybe UNSPEC too | |
267 | ||
268 | (status & STATUS_PORT_A) ? 'A' : 'B', | |
269 | STATUS_PACKETS_THIS(status), | |
270 | (status & STATUS_CONN_THIS) ? " CON" : "", | |
271 | (status & STATUS_SUSPEND_THIS) ? " SUS" : "", | |
272 | (status & STATUS_MAILBOX_THIS) ? " MBOX" : "", | |
273 | ||
274 | STATUS_PACKETS_OTHER(status), | |
275 | (status & STATUS_CONN_OTHER) ? " CON" : "", | |
276 | (status & STATUS_SUSPEND_OTHER) ? " SUS" : "", | |
277 | (status & STATUS_MAILBOX_OTHER) ? " MBOX" : "", | |
278 | ||
279 | status & STATUS_UNSPEC_MASK | |
280 | ); | |
281 | } | |
282 | ||
283 | /*-------------------------------------------------------------------------*/ | |
284 | ||
285 | /* | |
286 | * TTL register | |
287 | */ | |
288 | ||
289 | #define TTL_THIS(ttl) (0x00ff & ttl) | |
290 | #define TTL_OTHER(ttl) (0x00ff & (ttl >> 8)) | |
291 | #define MK_TTL(this,other) ((u16)(((other)<<8)|(0x00ff&(this)))) | |
292 | ||
293 | static inline void nc_dump_ttl(struct usbnet *dev, u16 ttl) | |
294 | { | |
295 | if (netif_msg_link(dev)) | |
296 | devdbg(dev, "net1080 %s-%s ttl 0x%x this = %d, other = %d", | |
297 | dev->udev->bus->bus_name, dev->udev->devpath, | |
298 | ttl, TTL_THIS(ttl), TTL_OTHER(ttl)); | |
299 | } | |
300 | ||
301 | /*-------------------------------------------------------------------------*/ | |
302 | ||
303 | static int net1080_reset(struct usbnet *dev) | |
304 | { | |
305 | u16 usbctl, status, ttl; | |
306 | u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL); | |
307 | int retval; | |
308 | ||
309 | if (!vp) | |
310 | return -ENOMEM; | |
311 | ||
312 | // nc_dump_registers(dev); | |
313 | ||
314 | if ((retval = nc_register_read(dev, REG_STATUS, vp)) < 0) { | |
315 | dbg("can't read %s-%s status: %d", | |
316 | dev->udev->bus->bus_name, dev->udev->devpath, retval); | |
317 | goto done; | |
318 | } | |
319 | status = *vp; | |
320 | nc_dump_status(dev, status); | |
321 | ||
322 | if ((retval = nc_register_read(dev, REG_USBCTL, vp)) < 0) { | |
323 | dbg("can't read USBCTL, %d", retval); | |
324 | goto done; | |
325 | } | |
326 | usbctl = *vp; | |
327 | nc_dump_usbctl(dev, usbctl); | |
328 | ||
329 | nc_register_write(dev, REG_USBCTL, | |
330 | USBCTL_FLUSH_THIS | USBCTL_FLUSH_OTHER); | |
331 | ||
332 | if ((retval = nc_register_read(dev, REG_TTL, vp)) < 0) { | |
333 | dbg("can't read TTL, %d", retval); | |
334 | goto done; | |
335 | } | |
336 | ttl = *vp; | |
337 | // nc_dump_ttl(dev, ttl); | |
338 | ||
339 | nc_register_write(dev, REG_TTL, | |
340 | MK_TTL(NC_READ_TTL_MS, TTL_OTHER(ttl)) ); | |
341 | dbg("%s: assigned TTL, %d ms", dev->net->name, NC_READ_TTL_MS); | |
342 | ||
343 | if (netif_msg_link(dev)) | |
344 | devinfo(dev, "port %c, peer %sconnected", | |
345 | (status & STATUS_PORT_A) ? 'A' : 'B', | |
346 | (status & STATUS_CONN_OTHER) ? "" : "dis" | |
347 | ); | |
348 | retval = 0; | |
349 | ||
350 | done: | |
351 | kfree(vp); | |
352 | return retval; | |
353 | } | |
354 | ||
355 | static int net1080_check_connect(struct usbnet *dev) | |
356 | { | |
357 | int retval; | |
358 | u16 status; | |
359 | u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL); | |
360 | ||
361 | if (!vp) | |
362 | return -ENOMEM; | |
363 | retval = nc_register_read(dev, REG_STATUS, vp); | |
364 | status = *vp; | |
365 | kfree(vp); | |
366 | if (retval != 0) { | |
367 | dbg("%s net1080_check_conn read - %d", dev->net->name, retval); | |
368 | return retval; | |
369 | } | |
370 | if ((status & STATUS_CONN_OTHER) != STATUS_CONN_OTHER) | |
371 | return -ENOLINK; | |
372 | return 0; | |
373 | } | |
374 | ||
375 | static void nc_flush_complete(struct urb *urb, struct pt_regs *regs) | |
376 | { | |
377 | kfree(urb->context); | |
378 | usb_free_urb(urb); | |
379 | } | |
380 | ||
381 | static void nc_ensure_sync(struct usbnet *dev) | |
382 | { | |
383 | dev->frame_errors++; | |
384 | if (dev->frame_errors > 5) { | |
385 | struct urb *urb; | |
386 | struct usb_ctrlrequest *req; | |
387 | int status; | |
388 | ||
389 | /* Send a flush */ | |
390 | urb = usb_alloc_urb(0, SLAB_ATOMIC); | |
391 | if (!urb) | |
392 | return; | |
393 | ||
394 | req = kmalloc(sizeof *req, GFP_ATOMIC); | |
395 | if (!req) { | |
396 | usb_free_urb(urb); | |
397 | return; | |
398 | } | |
399 | ||
400 | req->bRequestType = USB_DIR_OUT | |
401 | | USB_TYPE_VENDOR | |
402 | | USB_RECIP_DEVICE; | |
403 | req->bRequest = REQUEST_REGISTER; | |
404 | req->wValue = cpu_to_le16(USBCTL_FLUSH_THIS | |
405 | | USBCTL_FLUSH_OTHER); | |
406 | req->wIndex = cpu_to_le16(REG_USBCTL); | |
407 | req->wLength = cpu_to_le16(0); | |
408 | ||
409 | /* queue an async control request, we don't need | |
410 | * to do anything when it finishes except clean up. | |
411 | */ | |
412 | usb_fill_control_urb(urb, dev->udev, | |
413 | usb_sndctrlpipe(dev->udev, 0), | |
414 | (unsigned char *) req, | |
415 | NULL, 0, | |
416 | nc_flush_complete, req); | |
417 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
418 | if (status) { | |
419 | kfree(req); | |
420 | usb_free_urb(urb); | |
421 | return; | |
422 | } | |
423 | ||
424 | if (netif_msg_rx_err(dev)) | |
425 | devdbg(dev, "flush net1080; too many framing errors"); | |
426 | dev->frame_errors = 0; | |
427 | } | |
428 | } | |
429 | ||
430 | static int net1080_rx_fixup(struct usbnet *dev, struct sk_buff *skb) | |
431 | { | |
432 | struct nc_header *header; | |
433 | struct nc_trailer *trailer; | |
434 | u16 hdr_len, packet_len; | |
435 | ||
436 | if (!(skb->len & 0x01)) { | |
437 | #ifdef DEBUG | |
438 | struct net_device *net = dev->net; | |
439 | dbg("rx framesize %d range %d..%d mtu %d", skb->len, | |
440 | net->hard_header_len, dev->hard_mtu, net->mtu); | |
441 | #endif | |
442 | dev->stats.rx_frame_errors++; | |
443 | nc_ensure_sync(dev); | |
444 | return 0; | |
445 | } | |
446 | ||
447 | header = (struct nc_header *) skb->data; | |
448 | hdr_len = le16_to_cpup(&header->hdr_len); | |
449 | packet_len = le16_to_cpup(&header->packet_len); | |
450 | if (FRAMED_SIZE(packet_len) > NC_MAX_PACKET) { | |
451 | dev->stats.rx_frame_errors++; | |
452 | dbg("packet too big, %d", packet_len); | |
453 | nc_ensure_sync(dev); | |
454 | return 0; | |
455 | } else if (hdr_len < MIN_HEADER) { | |
456 | dev->stats.rx_frame_errors++; | |
457 | dbg("header too short, %d", hdr_len); | |
458 | nc_ensure_sync(dev); | |
459 | return 0; | |
460 | } else if (hdr_len > MIN_HEADER) { | |
461 | // out of band data for us? | |
462 | dbg("header OOB, %d bytes", hdr_len - MIN_HEADER); | |
463 | nc_ensure_sync(dev); | |
464 | // switch (vendor/product ids) { ... } | |
465 | } | |
466 | skb_pull(skb, hdr_len); | |
467 | ||
468 | trailer = (struct nc_trailer *) | |
469 | (skb->data + skb->len - sizeof *trailer); | |
470 | skb_trim(skb, skb->len - sizeof *trailer); | |
471 | ||
472 | if ((packet_len & 0x01) == 0) { | |
473 | if (skb->data [packet_len] != PAD_BYTE) { | |
474 | dev->stats.rx_frame_errors++; | |
475 | dbg("bad pad"); | |
476 | return 0; | |
477 | } | |
478 | skb_trim(skb, skb->len - 1); | |
479 | } | |
480 | if (skb->len != packet_len) { | |
481 | dev->stats.rx_frame_errors++; | |
482 | dbg("bad packet len %d (expected %d)", | |
483 | skb->len, packet_len); | |
484 | nc_ensure_sync(dev); | |
485 | return 0; | |
486 | } | |
487 | if (header->packet_id != get_unaligned(&trailer->packet_id)) { | |
488 | dev->stats.rx_fifo_errors++; | |
489 | dbg("(2+ dropped) rx packet_id mismatch 0x%x 0x%x", | |
490 | le16_to_cpu(header->packet_id), | |
491 | le16_to_cpu(trailer->packet_id)); | |
492 | return 0; | |
493 | } | |
494 | #if 0 | |
495 | devdbg(dev, "frame <rx h %d p %d id %d", header->hdr_len, | |
496 | header->packet_len, header->packet_id); | |
497 | #endif | |
498 | dev->frame_errors = 0; | |
499 | return 1; | |
500 | } | |
501 | ||
502 | static struct sk_buff * | |
55016f10 | 503 | net1080_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
904813cd DB |
504 | { |
505 | int padlen; | |
506 | struct sk_buff *skb2; | |
507 | struct nc_header *header = NULL; | |
508 | struct nc_trailer *trailer = NULL; | |
509 | int len = skb->len; | |
510 | ||
511 | padlen = ((len + sizeof (struct nc_header) | |
512 | + sizeof (struct nc_trailer)) & 0x01) ? 0 : 1; | |
513 | if (!skb_cloned(skb)) { | |
514 | int headroom = skb_headroom(skb); | |
515 | int tailroom = skb_tailroom(skb); | |
516 | ||
517 | if ((padlen + sizeof (struct nc_trailer)) <= tailroom | |
518 | && sizeof (struct nc_header) <= headroom) | |
519 | /* There's enough head and tail room */ | |
520 | goto encapsulate; | |
521 | ||
522 | if ((sizeof (struct nc_header) + padlen | |
523 | + sizeof (struct nc_trailer)) < | |
524 | (headroom + tailroom)) { | |
525 | /* There's enough total room, so just readjust */ | |
526 | skb->data = memmove(skb->head | |
527 | + sizeof (struct nc_header), | |
528 | skb->data, skb->len); | |
529 | skb->tail = skb->data + len; | |
530 | goto encapsulate; | |
531 | } | |
532 | } | |
533 | ||
534 | /* Create a new skb to use with the correct size */ | |
535 | skb2 = skb_copy_expand(skb, | |
536 | sizeof (struct nc_header), | |
537 | sizeof (struct nc_trailer) + padlen, | |
538 | flags); | |
539 | dev_kfree_skb_any(skb); | |
540 | if (!skb2) | |
541 | return skb2; | |
542 | skb = skb2; | |
543 | ||
544 | encapsulate: | |
545 | /* header first */ | |
546 | header = (struct nc_header *) skb_push(skb, sizeof *header); | |
547 | header->hdr_len = cpu_to_le16(sizeof (*header)); | |
548 | header->packet_len = cpu_to_le16(len); | |
549 | header->packet_id = cpu_to_le16((u16)dev->xid++); | |
550 | ||
551 | /* maybe pad; then trailer */ | |
552 | if (!((skb->len + sizeof *trailer) & 0x01)) | |
553 | *skb_put(skb, 1) = PAD_BYTE; | |
554 | trailer = (struct nc_trailer *) skb_put(skb, sizeof *trailer); | |
555 | put_unaligned(header->packet_id, &trailer->packet_id); | |
556 | #if 0 | |
557 | devdbg(dev, "frame >tx h %d p %d id %d", | |
558 | header->hdr_len, header->packet_len, | |
559 | header->packet_id); | |
560 | #endif | |
561 | return skb; | |
562 | } | |
563 | ||
564 | static int net1080_bind(struct usbnet *dev, struct usb_interface *intf) | |
565 | { | |
566 | unsigned extra = sizeof (struct nc_header) | |
567 | + 1 | |
568 | + sizeof (struct nc_trailer); | |
569 | ||
570 | dev->net->hard_header_len += extra; | |
571 | dev->rx_urb_size = dev->net->hard_header_len + dev->net->mtu; | |
572 | dev->hard_mtu = NC_MAX_PACKET; | |
573 | return usbnet_get_endpoints (dev, intf); | |
574 | } | |
575 | ||
576 | static const struct driver_info net1080_info = { | |
577 | .description = "NetChip TurboCONNECT", | |
578 | .flags = FLAG_FRAMING_NC, | |
579 | .bind = net1080_bind, | |
580 | .reset = net1080_reset, | |
581 | .check_connect = net1080_check_connect, | |
582 | .rx_fixup = net1080_rx_fixup, | |
583 | .tx_fixup = net1080_tx_fixup, | |
584 | }; | |
585 | ||
586 | static const struct usb_device_id products [] = { | |
587 | { | |
588 | USB_DEVICE(0x0525, 0x1080), // NetChip ref design | |
589 | .driver_info = (unsigned long) &net1080_info, | |
590 | }, { | |
591 | USB_DEVICE(0x06D0, 0x0622), // Laplink Gold | |
592 | .driver_info = (unsigned long) &net1080_info, | |
593 | }, | |
594 | { }, // END | |
595 | }; | |
596 | MODULE_DEVICE_TABLE(usb, products); | |
597 | ||
598 | static struct usb_driver net1080_driver = { | |
599 | .owner = THIS_MODULE, | |
600 | .name = "net1080", | |
601 | .id_table = products, | |
602 | .probe = usbnet_probe, | |
603 | .disconnect = usbnet_disconnect, | |
604 | .suspend = usbnet_suspend, | |
605 | .resume = usbnet_resume, | |
606 | }; | |
607 | ||
608 | static int __init net1080_init(void) | |
609 | { | |
610 | return usb_register(&net1080_driver); | |
611 | } | |
612 | module_init(net1080_init); | |
613 | ||
614 | static void __exit net1080_exit(void) | |
615 | { | |
616 | usb_deregister(&net1080_driver); | |
617 | } | |
618 | module_exit(net1080_exit); | |
619 | ||
620 | MODULE_AUTHOR("David Brownell"); | |
621 | MODULE_DESCRIPTION("NetChip 1080 based USB Host-to-Host Links"); | |
622 | MODULE_LICENSE("GPL"); |