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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 | 23 | #include <linux/module.h> |
904813cd DB |
24 | #include <linux/init.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/ethtool.h> | |
28 | #include <linux/workqueue.h> | |
29 | #include <linux/mii.h> | |
30 | #include <linux/usb.h> | |
3692e94f | 31 | #include <linux/usb/usbnet.h> |
904813cd DB |
32 | |
33 | #include <asm/unaligned.h> | |
34 | ||
904813cd DB |
35 | |
36 | /* | |
37 | * Netchip 1080 driver ... http://www.netchip.com | |
38 | * (Sept 2004: End-of-life announcement has been sent.) | |
39 | * Used in (some) LapLink cables | |
40 | */ | |
41 | ||
42 | #define frame_errors data[1] | |
43 | ||
44 | /* | |
45 | * NetChip framing of ethernet packets, supporting additional error | |
46 | * checks for links that may drop bulk packets from inside messages. | |
47 | * Odd USB length == always short read for last usb packet. | |
48 | * - nc_header | |
49 | * - Ethernet header (14 bytes) | |
50 | * - payload | |
51 | * - (optional padding byte, if needed so length becomes odd) | |
52 | * - nc_trailer | |
53 | * | |
54 | * This framing is to be avoided for non-NetChip devices. | |
55 | */ | |
56 | ||
57 | struct nc_header { // packed: | |
58 | __le16 hdr_len; // sizeof nc_header (LE, all) | |
59 | __le16 packet_len; // payload size (including ethhdr) | |
60 | __le16 packet_id; // detects dropped packets | |
61 | #define MIN_HEADER 6 | |
62 | ||
63 | // all else is optional, and must start with: | |
64 | // __le16 vendorId; // from usb-if | |
65 | // __le16 productId; | |
66 | } __attribute__((__packed__)); | |
67 | ||
68 | #define PAD_BYTE ((unsigned char)0xAC) | |
69 | ||
70 | struct nc_trailer { | |
71 | __le16 packet_id; | |
72 | } __attribute__((__packed__)); | |
73 | ||
74 | // packets may use FLAG_FRAMING_NC and optional pad | |
75 | #define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \ | |
76 | + sizeof (struct ethhdr) \ | |
77 | + (mtu) \ | |
78 | + 1 \ | |
79 | + sizeof (struct nc_trailer)) | |
80 | ||
81 | #define MIN_FRAMED FRAMED_SIZE(0) | |
82 | ||
83 | /* packets _could_ be up to 64KB... */ | |
84 | #define NC_MAX_PACKET 32767 | |
85 | ||
86 | ||
87 | /* | |
88 | * Zero means no timeout; else, how long a 64 byte bulk packet may be queued | |
89 | * before the hardware drops it. If that's done, the driver will need to | |
90 | * frame network packets to guard against the dropped USB packets. The win32 | |
91 | * driver sets this for both sides of the link. | |
92 | */ | |
93 | #define NC_READ_TTL_MS ((u8)255) // ms | |
94 | ||
95 | /* | |
96 | * We ignore most registers and EEPROM contents. | |
97 | */ | |
98 | #define REG_USBCTL ((u8)0x04) | |
99 | #define REG_TTL ((u8)0x10) | |
100 | #define REG_STATUS ((u8)0x11) | |
101 | ||
102 | /* | |
103 | * Vendor specific requests to read/write data | |
104 | */ | |
105 | #define REQUEST_REGISTER ((u8)0x10) | |
106 | #define REQUEST_EEPROM ((u8)0x11) | |
107 | ||
108 | static int | |
109 | nc_vendor_read(struct usbnet *dev, u8 req, u8 regnum, u16 *retval_ptr) | |
110 | { | |
111 | int status = usb_control_msg(dev->udev, | |
112 | usb_rcvctrlpipe(dev->udev, 0), | |
113 | req, | |
114 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
115 | 0, regnum, | |
116 | retval_ptr, sizeof *retval_ptr, | |
117 | USB_CTRL_GET_TIMEOUT); | |
118 | if (status > 0) | |
119 | status = 0; | |
120 | if (!status) | |
121 | le16_to_cpus(retval_ptr); | |
122 | return status; | |
123 | } | |
124 | ||
125 | static inline int | |
126 | nc_register_read(struct usbnet *dev, u8 regnum, u16 *retval_ptr) | |
127 | { | |
128 | return nc_vendor_read(dev, REQUEST_REGISTER, regnum, retval_ptr); | |
129 | } | |
130 | ||
131 | // no retval ... can become async, usable in_interrupt() | |
132 | static void | |
133 | nc_vendor_write(struct usbnet *dev, u8 req, u8 regnum, u16 value) | |
134 | { | |
135 | usb_control_msg(dev->udev, | |
136 | usb_sndctrlpipe(dev->udev, 0), | |
137 | req, | |
138 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
139 | value, regnum, | |
140 | NULL, 0, // data is in setup packet | |
141 | USB_CTRL_SET_TIMEOUT); | |
142 | } | |
143 | ||
144 | static inline void | |
145 | nc_register_write(struct usbnet *dev, u8 regnum, u16 value) | |
146 | { | |
147 | nc_vendor_write(dev, REQUEST_REGISTER, regnum, value); | |
148 | } | |
149 | ||
150 | ||
151 | #if 0 | |
152 | static void nc_dump_registers(struct usbnet *dev) | |
153 | { | |
154 | u8 reg; | |
155 | u16 *vp = kmalloc(sizeof (u16)); | |
156 | ||
157 | if (!vp) { | |
158 | dbg("no memory?"); | |
159 | return; | |
160 | } | |
161 | ||
162 | dbg("%s registers:", dev->net->name); | |
163 | for (reg = 0; reg < 0x20; reg++) { | |
164 | int retval; | |
165 | ||
166 | // reading some registers is trouble | |
167 | if (reg >= 0x08 && reg <= 0xf) | |
168 | continue; | |
169 | if (reg >= 0x12 && reg <= 0x1e) | |
170 | continue; | |
171 | ||
172 | retval = nc_register_read(dev, reg, vp); | |
173 | if (retval < 0) | |
174 | dbg("%s reg [0x%x] ==> error %d", | |
175 | dev->net->name, reg, retval); | |
176 | else | |
177 | dbg("%s reg [0x%x] = 0x%x", | |
178 | dev->net->name, reg, *vp); | |
179 | } | |
180 | kfree(vp); | |
181 | } | |
182 | #endif | |
183 | ||
184 | ||
185 | /*-------------------------------------------------------------------------*/ | |
186 | ||
187 | /* | |
188 | * Control register | |
189 | */ | |
190 | ||
191 | #define USBCTL_WRITABLE_MASK 0x1f0f | |
192 | // bits 15-13 reserved, r/o | |
193 | #define USBCTL_ENABLE_LANG (1 << 12) | |
194 | #define USBCTL_ENABLE_MFGR (1 << 11) | |
195 | #define USBCTL_ENABLE_PROD (1 << 10) | |
196 | #define USBCTL_ENABLE_SERIAL (1 << 9) | |
197 | #define USBCTL_ENABLE_DEFAULTS (1 << 8) | |
198 | // bits 7-4 reserved, r/o | |
199 | #define USBCTL_FLUSH_OTHER (1 << 3) | |
200 | #define USBCTL_FLUSH_THIS (1 << 2) | |
201 | #define USBCTL_DISCONN_OTHER (1 << 1) | |
202 | #define USBCTL_DISCONN_THIS (1 << 0) | |
203 | ||
204 | static inline void nc_dump_usbctl(struct usbnet *dev, u16 usbctl) | |
205 | { | |
a475f603 JP |
206 | netif_dbg(dev, link, dev->net, |
207 | "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s; this%s%s; other%s%s; r/o 0x%x\n", | |
208 | dev->udev->bus->bus_name, dev->udev->devpath, | |
209 | usbctl, | |
210 | (usbctl & USBCTL_ENABLE_LANG) ? " lang" : "", | |
211 | (usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "", | |
212 | (usbctl & USBCTL_ENABLE_PROD) ? " prod" : "", | |
213 | (usbctl & USBCTL_ENABLE_SERIAL) ? " serial" : "", | |
214 | (usbctl & USBCTL_ENABLE_DEFAULTS) ? " defaults" : "", | |
215 | ||
216 | (usbctl & USBCTL_FLUSH_THIS) ? " FLUSH" : "", | |
217 | (usbctl & USBCTL_DISCONN_THIS) ? " DIS" : "", | |
218 | ||
219 | (usbctl & USBCTL_FLUSH_OTHER) ? " FLUSH" : "", | |
220 | (usbctl & USBCTL_DISCONN_OTHER) ? " DIS" : "", | |
221 | ||
222 | usbctl & ~USBCTL_WRITABLE_MASK); | |
904813cd DB |
223 | } |
224 | ||
225 | /*-------------------------------------------------------------------------*/ | |
226 | ||
227 | /* | |
228 | * Status register | |
229 | */ | |
230 | ||
231 | #define STATUS_PORT_A (1 << 15) | |
232 | ||
233 | #define STATUS_CONN_OTHER (1 << 14) | |
234 | #define STATUS_SUSPEND_OTHER (1 << 13) | |
235 | #define STATUS_MAILBOX_OTHER (1 << 12) | |
b4ee4a23 | 236 | #define STATUS_PACKETS_OTHER(n) (((n) >> 8) & 0x03) |
904813cd DB |
237 | |
238 | #define STATUS_CONN_THIS (1 << 6) | |
239 | #define STATUS_SUSPEND_THIS (1 << 5) | |
240 | #define STATUS_MAILBOX_THIS (1 << 4) | |
b4ee4a23 | 241 | #define STATUS_PACKETS_THIS(n) (((n) >> 0) & 0x03) |
904813cd DB |
242 | |
243 | #define STATUS_UNSPEC_MASK 0x0c8c | |
244 | #define STATUS_NOISE_MASK ((u16)~(0x0303|STATUS_UNSPEC_MASK)) | |
245 | ||
246 | ||
247 | static inline void nc_dump_status(struct usbnet *dev, u16 status) | |
248 | { | |
a475f603 JP |
249 | netif_dbg(dev, link, dev->net, |
250 | "net1080 %s-%s status 0x%x: this (%c) PKT=%d%s%s%s; other PKT=%d%s%s%s; unspec 0x%x\n", | |
251 | dev->udev->bus->bus_name, dev->udev->devpath, | |
252 | status, | |
253 | ||
254 | // XXX the packet counts don't seem right | |
255 | // (1 at reset, not 0); maybe UNSPEC too | |
256 | ||
257 | (status & STATUS_PORT_A) ? 'A' : 'B', | |
258 | STATUS_PACKETS_THIS(status), | |
259 | (status & STATUS_CONN_THIS) ? " CON" : "", | |
260 | (status & STATUS_SUSPEND_THIS) ? " SUS" : "", | |
261 | (status & STATUS_MAILBOX_THIS) ? " MBOX" : "", | |
262 | ||
263 | STATUS_PACKETS_OTHER(status), | |
264 | (status & STATUS_CONN_OTHER) ? " CON" : "", | |
265 | (status & STATUS_SUSPEND_OTHER) ? " SUS" : "", | |
266 | (status & STATUS_MAILBOX_OTHER) ? " MBOX" : "", | |
267 | ||
268 | status & STATUS_UNSPEC_MASK); | |
904813cd DB |
269 | } |
270 | ||
271 | /*-------------------------------------------------------------------------*/ | |
272 | ||
273 | /* | |
274 | * TTL register | |
275 | */ | |
276 | ||
277 | #define TTL_THIS(ttl) (0x00ff & ttl) | |
278 | #define TTL_OTHER(ttl) (0x00ff & (ttl >> 8)) | |
279 | #define MK_TTL(this,other) ((u16)(((other)<<8)|(0x00ff&(this)))) | |
280 | ||
281 | static inline void nc_dump_ttl(struct usbnet *dev, u16 ttl) | |
282 | { | |
a475f603 JP |
283 | netif_dbg(dev, link, dev->net, "net1080 %s-%s ttl 0x%x this = %d, other = %d\n", |
284 | dev->udev->bus->bus_name, dev->udev->devpath, | |
285 | ttl, TTL_THIS(ttl), TTL_OTHER(ttl)); | |
904813cd DB |
286 | } |
287 | ||
288 | /*-------------------------------------------------------------------------*/ | |
289 | ||
290 | static int net1080_reset(struct usbnet *dev) | |
291 | { | |
292 | u16 usbctl, status, ttl; | |
293 | u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL); | |
294 | int retval; | |
295 | ||
296 | if (!vp) | |
297 | return -ENOMEM; | |
298 | ||
299 | // nc_dump_registers(dev); | |
300 | ||
301 | if ((retval = nc_register_read(dev, REG_STATUS, vp)) < 0) { | |
302 | dbg("can't read %s-%s status: %d", | |
303 | dev->udev->bus->bus_name, dev->udev->devpath, retval); | |
304 | goto done; | |
305 | } | |
306 | status = *vp; | |
307 | nc_dump_status(dev, status); | |
308 | ||
309 | if ((retval = nc_register_read(dev, REG_USBCTL, vp)) < 0) { | |
310 | dbg("can't read USBCTL, %d", retval); | |
311 | goto done; | |
312 | } | |
313 | usbctl = *vp; | |
314 | nc_dump_usbctl(dev, usbctl); | |
315 | ||
316 | nc_register_write(dev, REG_USBCTL, | |
317 | USBCTL_FLUSH_THIS | USBCTL_FLUSH_OTHER); | |
318 | ||
319 | if ((retval = nc_register_read(dev, REG_TTL, vp)) < 0) { | |
320 | dbg("can't read TTL, %d", retval); | |
321 | goto done; | |
322 | } | |
323 | ttl = *vp; | |
324 | // nc_dump_ttl(dev, ttl); | |
325 | ||
326 | nc_register_write(dev, REG_TTL, | |
327 | MK_TTL(NC_READ_TTL_MS, TTL_OTHER(ttl)) ); | |
328 | dbg("%s: assigned TTL, %d ms", dev->net->name, NC_READ_TTL_MS); | |
329 | ||
a475f603 JP |
330 | netif_info(dev, link, dev->net, "port %c, peer %sconnected\n", |
331 | (status & STATUS_PORT_A) ? 'A' : 'B', | |
332 | (status & STATUS_CONN_OTHER) ? "" : "dis"); | |
904813cd DB |
333 | retval = 0; |
334 | ||
335 | done: | |
336 | kfree(vp); | |
337 | return retval; | |
338 | } | |
339 | ||
340 | static int net1080_check_connect(struct usbnet *dev) | |
341 | { | |
342 | int retval; | |
343 | u16 status; | |
344 | u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL); | |
345 | ||
346 | if (!vp) | |
347 | return -ENOMEM; | |
348 | retval = nc_register_read(dev, REG_STATUS, vp); | |
349 | status = *vp; | |
350 | kfree(vp); | |
351 | if (retval != 0) { | |
352 | dbg("%s net1080_check_conn read - %d", dev->net->name, retval); | |
353 | return retval; | |
354 | } | |
355 | if ((status & STATUS_CONN_OTHER) != STATUS_CONN_OTHER) | |
356 | return -ENOLINK; | |
357 | return 0; | |
358 | } | |
359 | ||
7d12e780 | 360 | static void nc_flush_complete(struct urb *urb) |
904813cd DB |
361 | { |
362 | kfree(urb->context); | |
363 | usb_free_urb(urb); | |
364 | } | |
365 | ||
366 | static void nc_ensure_sync(struct usbnet *dev) | |
367 | { | |
368 | dev->frame_errors++; | |
369 | if (dev->frame_errors > 5) { | |
370 | struct urb *urb; | |
371 | struct usb_ctrlrequest *req; | |
372 | int status; | |
373 | ||
374 | /* Send a flush */ | |
54e6ecb2 | 375 | urb = usb_alloc_urb(0, GFP_ATOMIC); |
904813cd DB |
376 | if (!urb) |
377 | return; | |
378 | ||
379 | req = kmalloc(sizeof *req, GFP_ATOMIC); | |
380 | if (!req) { | |
381 | usb_free_urb(urb); | |
382 | return; | |
383 | } | |
384 | ||
385 | req->bRequestType = USB_DIR_OUT | |
386 | | USB_TYPE_VENDOR | |
387 | | USB_RECIP_DEVICE; | |
388 | req->bRequest = REQUEST_REGISTER; | |
389 | req->wValue = cpu_to_le16(USBCTL_FLUSH_THIS | |
390 | | USBCTL_FLUSH_OTHER); | |
391 | req->wIndex = cpu_to_le16(REG_USBCTL); | |
392 | req->wLength = cpu_to_le16(0); | |
393 | ||
394 | /* queue an async control request, we don't need | |
395 | * to do anything when it finishes except clean up. | |
396 | */ | |
397 | usb_fill_control_urb(urb, dev->udev, | |
398 | usb_sndctrlpipe(dev->udev, 0), | |
399 | (unsigned char *) req, | |
400 | NULL, 0, | |
401 | nc_flush_complete, req); | |
402 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
403 | if (status) { | |
404 | kfree(req); | |
405 | usb_free_urb(urb); | |
406 | return; | |
407 | } | |
408 | ||
a475f603 JP |
409 | netif_dbg(dev, rx_err, dev->net, |
410 | "flush net1080; too many framing errors\n"); | |
904813cd DB |
411 | dev->frame_errors = 0; |
412 | } | |
413 | } | |
414 | ||
415 | static int net1080_rx_fixup(struct usbnet *dev, struct sk_buff *skb) | |
416 | { | |
417 | struct nc_header *header; | |
418 | struct nc_trailer *trailer; | |
419 | u16 hdr_len, packet_len; | |
420 | ||
421 | if (!(skb->len & 0x01)) { | |
422 | #ifdef DEBUG | |
423 | struct net_device *net = dev->net; | |
424 | dbg("rx framesize %d range %d..%d mtu %d", skb->len, | |
425 | net->hard_header_len, dev->hard_mtu, net->mtu); | |
426 | #endif | |
a22d2b36 | 427 | dev->net->stats.rx_frame_errors++; |
904813cd DB |
428 | nc_ensure_sync(dev); |
429 | return 0; | |
430 | } | |
431 | ||
432 | header = (struct nc_header *) skb->data; | |
433 | hdr_len = le16_to_cpup(&header->hdr_len); | |
434 | packet_len = le16_to_cpup(&header->packet_len); | |
435 | if (FRAMED_SIZE(packet_len) > NC_MAX_PACKET) { | |
a22d2b36 | 436 | dev->net->stats.rx_frame_errors++; |
904813cd DB |
437 | dbg("packet too big, %d", packet_len); |
438 | nc_ensure_sync(dev); | |
439 | return 0; | |
440 | } else if (hdr_len < MIN_HEADER) { | |
a22d2b36 | 441 | dev->net->stats.rx_frame_errors++; |
904813cd DB |
442 | dbg("header too short, %d", hdr_len); |
443 | nc_ensure_sync(dev); | |
444 | return 0; | |
445 | } else if (hdr_len > MIN_HEADER) { | |
446 | // out of band data for us? | |
447 | dbg("header OOB, %d bytes", hdr_len - MIN_HEADER); | |
448 | nc_ensure_sync(dev); | |
449 | // switch (vendor/product ids) { ... } | |
450 | } | |
451 | skb_pull(skb, hdr_len); | |
452 | ||
453 | trailer = (struct nc_trailer *) | |
454 | (skb->data + skb->len - sizeof *trailer); | |
455 | skb_trim(skb, skb->len - sizeof *trailer); | |
456 | ||
457 | if ((packet_len & 0x01) == 0) { | |
458 | if (skb->data [packet_len] != PAD_BYTE) { | |
a22d2b36 | 459 | dev->net->stats.rx_frame_errors++; |
904813cd DB |
460 | dbg("bad pad"); |
461 | return 0; | |
462 | } | |
463 | skb_trim(skb, skb->len - 1); | |
464 | } | |
465 | if (skb->len != packet_len) { | |
a22d2b36 | 466 | dev->net->stats.rx_frame_errors++; |
904813cd DB |
467 | dbg("bad packet len %d (expected %d)", |
468 | skb->len, packet_len); | |
469 | nc_ensure_sync(dev); | |
470 | return 0; | |
471 | } | |
472 | if (header->packet_id != get_unaligned(&trailer->packet_id)) { | |
a22d2b36 | 473 | dev->net->stats.rx_fifo_errors++; |
904813cd DB |
474 | dbg("(2+ dropped) rx packet_id mismatch 0x%x 0x%x", |
475 | le16_to_cpu(header->packet_id), | |
476 | le16_to_cpu(trailer->packet_id)); | |
477 | return 0; | |
478 | } | |
479 | #if 0 | |
60b86755 JP |
480 | netdev_dbg(dev->net, "frame <rx h %d p %d id %d\n", header->hdr_len, |
481 | header->packet_len, header->packet_id); | |
904813cd DB |
482 | #endif |
483 | dev->frame_errors = 0; | |
484 | return 1; | |
485 | } | |
486 | ||
487 | static struct sk_buff * | |
55016f10 | 488 | net1080_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
904813cd | 489 | { |
904813cd DB |
490 | struct sk_buff *skb2; |
491 | struct nc_header *header = NULL; | |
492 | struct nc_trailer *trailer = NULL; | |
9bcbcf4d | 493 | int padlen = sizeof (struct nc_trailer); |
904813cd DB |
494 | int len = skb->len; |
495 | ||
9bcbcf4d | 496 | if (!((len + padlen + sizeof (struct nc_header)) & 0x01)) |
497 | padlen++; | |
904813cd DB |
498 | if (!skb_cloned(skb)) { |
499 | int headroom = skb_headroom(skb); | |
500 | int tailroom = skb_tailroom(skb); | |
501 | ||
9bcbcf4d | 502 | if (padlen <= tailroom && |
503 | sizeof(struct nc_header) <= headroom) | |
904813cd DB |
504 | /* There's enough head and tail room */ |
505 | goto encapsulate; | |
506 | ||
9bcbcf4d | 507 | if ((sizeof (struct nc_header) + padlen) < |
904813cd DB |
508 | (headroom + tailroom)) { |
509 | /* There's enough total room, so just readjust */ | |
510 | skb->data = memmove(skb->head | |
511 | + sizeof (struct nc_header), | |
512 | skb->data, skb->len); | |
27a884dc | 513 | skb_set_tail_pointer(skb, len); |
904813cd DB |
514 | goto encapsulate; |
515 | } | |
516 | } | |
517 | ||
518 | /* Create a new skb to use with the correct size */ | |
519 | skb2 = skb_copy_expand(skb, | |
520 | sizeof (struct nc_header), | |
9bcbcf4d | 521 | padlen, |
904813cd DB |
522 | flags); |
523 | dev_kfree_skb_any(skb); | |
524 | if (!skb2) | |
525 | return skb2; | |
526 | skb = skb2; | |
527 | ||
528 | encapsulate: | |
529 | /* header first */ | |
530 | header = (struct nc_header *) skb_push(skb, sizeof *header); | |
531 | header->hdr_len = cpu_to_le16(sizeof (*header)); | |
532 | header->packet_len = cpu_to_le16(len); | |
533 | header->packet_id = cpu_to_le16((u16)dev->xid++); | |
534 | ||
535 | /* maybe pad; then trailer */ | |
536 | if (!((skb->len + sizeof *trailer) & 0x01)) | |
537 | *skb_put(skb, 1) = PAD_BYTE; | |
538 | trailer = (struct nc_trailer *) skb_put(skb, sizeof *trailer); | |
539 | put_unaligned(header->packet_id, &trailer->packet_id); | |
540 | #if 0 | |
60b86755 JP |
541 | netdev_dbg(dev->net, "frame >tx h %d p %d id %d\n", |
542 | header->hdr_len, header->packet_len, | |
543 | header->packet_id); | |
904813cd DB |
544 | #endif |
545 | return skb; | |
546 | } | |
547 | ||
548 | static int net1080_bind(struct usbnet *dev, struct usb_interface *intf) | |
549 | { | |
550 | unsigned extra = sizeof (struct nc_header) | |
551 | + 1 | |
552 | + sizeof (struct nc_trailer); | |
553 | ||
554 | dev->net->hard_header_len += extra; | |
555 | dev->rx_urb_size = dev->net->hard_header_len + dev->net->mtu; | |
556 | dev->hard_mtu = NC_MAX_PACKET; | |
557 | return usbnet_get_endpoints (dev, intf); | |
558 | } | |
559 | ||
560 | static const struct driver_info net1080_info = { | |
561 | .description = "NetChip TurboCONNECT", | |
562 | .flags = FLAG_FRAMING_NC, | |
563 | .bind = net1080_bind, | |
564 | .reset = net1080_reset, | |
565 | .check_connect = net1080_check_connect, | |
566 | .rx_fixup = net1080_rx_fixup, | |
567 | .tx_fixup = net1080_tx_fixup, | |
568 | }; | |
569 | ||
570 | static const struct usb_device_id products [] = { | |
571 | { | |
572 | USB_DEVICE(0x0525, 0x1080), // NetChip ref design | |
573 | .driver_info = (unsigned long) &net1080_info, | |
574 | }, { | |
575 | USB_DEVICE(0x06D0, 0x0622), // Laplink Gold | |
576 | .driver_info = (unsigned long) &net1080_info, | |
577 | }, | |
578 | { }, // END | |
579 | }; | |
580 | MODULE_DEVICE_TABLE(usb, products); | |
581 | ||
582 | static struct usb_driver net1080_driver = { | |
904813cd DB |
583 | .name = "net1080", |
584 | .id_table = products, | |
585 | .probe = usbnet_probe, | |
586 | .disconnect = usbnet_disconnect, | |
587 | .suspend = usbnet_suspend, | |
588 | .resume = usbnet_resume, | |
589 | }; | |
590 | ||
591 | static int __init net1080_init(void) | |
592 | { | |
593 | return usb_register(&net1080_driver); | |
594 | } | |
595 | module_init(net1080_init); | |
596 | ||
597 | static void __exit net1080_exit(void) | |
598 | { | |
599 | usb_deregister(&net1080_driver); | |
600 | } | |
601 | module_exit(net1080_exit); | |
602 | ||
603 | MODULE_AUTHOR("David Brownell"); | |
604 | MODULE_DESCRIPTION("NetChip 1080 based USB Host-to-Host Links"); | |
605 | MODULE_LICENSE("GPL"); |