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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / usb / net / usbnet.c
blob85476e76b244c4b166042dfa5e2bdbad368fdc82
1 /*
2 * USB Networking Links
3 * Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
4 * Copyright (C) 2002 Pavel Machek <pavel@ucw.cz>
5 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
6 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
7 * Copyright (c) 2002-2003 TiVo Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 /*
25 * This is a generic "USB networking" framework that works with several
26 * kinds of full and high speed networking devices:
27 *
28 * + USB host-to-host "network cables", used for IP-over-USB links.
29 * These are often used for Laplink style connectivity products.
30 * - AnchorChip 2720
31 * - Belkin, eTEK (interops with Win32 drivers)
32 * - GeneSys GL620USB-A
33 * - NetChip 1080 (interoperates with NetChip Win32 drivers)
34 * - Prolific PL-2301/2302 (replaces "plusb" driver)
35 * - KC Technology KC2190
36 *
37 * + Smart USB devices can support such links directly, using Internet
38 * standard protocols instead of proprietary host-to-device links.
39 * - Linux PDAs like iPaq, Yopy, and Zaurus
40 * - The BLOB boot loader (for diskless booting)
41 * - Linux "gadgets", perhaps using PXA-2xx or Net2280 controllers
42 * - Devices using EPSON's sample USB firmware
43 * - CDC-Ethernet class devices, such as many cable modems
44 *
45 * + Adapters to networks such as Ethernet.
46 * - AX8817X based USB 2.0 products
47 *
48 * Links to these devices can be bridged using Linux Ethernet bridging.
49 * With minor exceptions, these all use similar USB framing for network
50 * traffic, but need different protocols for control traffic.
51 *
52 * USB devices can implement their side of this protocol at the cost
53 * of two bulk endpoints; it's not restricted to "cable" applications.
54 * See the SA1110, Zaurus, or EPSON device/client support in this driver;
55 * slave/target drivers such as "usb-eth" (on most SA-1100 PDAs) or
56 * "g_ether" (in the Linux "gadget" framework) implement that behavior
57 * within devices.
58 *
59 *
60 * CHANGELOG:
61 *
62 * 13-sep-2000 experimental, new
63 * 10-oct-2000 usb_device_id table created.
64 * 28-oct-2000 misc fixes; mostly, discard more TTL-mangled rx packets.
65 * 01-nov-2000 usb_device_id table and probing api update by
66 * Adam J. Richter <adam@yggdrasil.com>.
67 * 18-dec-2000 (db) tx watchdog, "net1080" renaming to "usbnet", device_info
68 * and prolific support, isolate net1080-specific bits, cleanup.
69 * fix unlink_urbs oops in D3 PM resume code path.
70 *
71 * 02-feb-2001 (db) fix tx skb sharing, packet length, match_flags, ...
72 * 08-feb-2001 stubbed in "linuxdev", maybe the SA-1100 folk can use it;
73 * AnchorChips 2720 support (from spec) for testing;
74 * fix bit-ordering problem with ethernet multicast addr
75 * 19-feb-2001 Support for clearing halt conditions. SA1100 UDC support
76 * updates. Oleg Drokin (green@iXcelerator.com)
77 * 25-mar-2001 More SA-1100 updates, including workaround for ip problem
78 * expecting cleared skb->cb and framing change to match latest
79 * handhelds.org version (Oleg). Enable device IDs from the
80 * Win32 Belkin driver; other cleanups (db).
81 * 16-jul-2001 Bugfixes for uhci oops-on-unplug, Belkin support, various
82 * cleanups for problems not yet seen in the field. (db)
83 * 17-oct-2001 Handle "Advance USBNET" product, like Belkin/eTEK devices,
84 * from Ioannis Mavroukakis <i.mavroukakis@btinternet.com>;
85 * rx unlinks somehow weren't async; minor cleanup.
86 * 03-nov-2001 Merged GeneSys driver; original code from Jiun-Jie Huang
87 * <huangjj@genesyslogic.com.tw>, updated by Stanislav Brabec
88 * <utx@penguin.cz>. Made framing options (NetChip/GeneSys)
89 * tie mostly to (sub)driver info. Workaround some PL-2302
90 * chips that seem to reject SET_INTERFACE requests.
91 *
92 * 06-apr-2002 Added ethtool support, based on a patch from Brad Hards.
93 * Level of diagnostics is more configurable; they use device
94 * location (usb_device->devpath) instead of address (2.5).
95 * For tx_fixup, memflags can't be NOIO.
96 * 07-may-2002 Generalize/cleanup keventd support, handling rx stalls (mostly
97 * for USB 2.0 TTs) and memory shortages (potential) too. (db)
98 * Use "locally assigned" IEEE802 address space. (Brad Hards)
99 * 18-oct-2002 Support for Zaurus (Pavel Machek), related cleanup (db).
100 * 14-dec-2002 Remove Zaurus-private crc32 code (Pavel); 2.5 oops fix,
101 * cleanups and stubbed PXA-250 support (db), fix for framing
102 * issues on Z, net1080, and gl620a (Toby Milne)
103 *
104 * 31-mar-2003 Use endpoint descriptors: high speed support, simpler sa1100
105 * vs pxa25x, and CDC Ethernet. Throttle down log floods on
106 * disconnect; other cleanups. (db) Flush net1080 fifos
107 * after several sequential framing errors. (Johannes Erdfelt)
108 * 22-aug-2003 AX8817X support (Dave Hollis).
109 * 14-jun-2004 Trivial patch for AX8817X based Buffalo LUA-U2-KTX in Japan
110 * (Neil Bortnak)
111 * 03-nov-2004 Trivial patch for KC2190 (KC-190) chip. (Jonathan McDowell)
112 *
113 * 01-feb-2005 AX88772 support (Phil Chang & Dave Hollis)
114 *-------------------------------------------------------------------------*/
115
116 // #define DEBUG // error path messages, extra info
117 // #define VERBOSE // more; success messages
118
119 #include <linux/config.h>
120 #ifdef CONFIG_USB_DEBUG
121 # define DEBUG
122 #endif
123 #include <linux/module.h>
124 #include <linux/kmod.h>
125 #include <linux/sched.h>
126 #include <linux/init.h>
127 #include <linux/netdevice.h>
128 #include <linux/etherdevice.h>
129 #include <linux/random.h>
130 #include <linux/ethtool.h>
131 #include <linux/workqueue.h>
132 #include <linux/mii.h>
133 #include <asm/uaccess.h>
134 #include <asm/unaligned.h>
135 #include <linux/usb.h>
136 #include <asm/io.h>
137 #include <asm/scatterlist.h>
138 #include <linux/mm.h>
139 #include <linux/dma-mapping.h>
140
141 #define DRIVER_VERSION "03-Nov-2004"
142
143
144 /*-------------------------------------------------------------------------*/
145
146 /*
147 * Nineteen USB 1.1 max size bulk transactions per frame (ms), max.
148 * Several dozen bytes of IPv4 data can fit in two such transactions.
149 * One maximum size Ethernet packet takes twenty four of them.
150 * For high speed, each frame comfortably fits almost 36 max size
151 * Ethernet packets (so queues should be bigger).
152 */
153 #define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
154 #define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
155
156 // packets are always ethernet inside
157 // ... except they can be bigger (limit of 64K with NetChip framing)
158 #define MIN_PACKET sizeof(struct ethhdr)
159 #define MAX_PACKET 32768
160
161 // reawaken network queue this soon after stopping; else watchdog barks
162 #define TX_TIMEOUT_JIFFIES (5*HZ)
163
164 // throttle rx/tx briefly after some faults, so khubd might disconnect()
165 // us (it polls at HZ/4 usually) before we report too many false errors.
166 #define THROTTLE_JIFFIES (HZ/8)
167
168 // for vendor-specific control operations
169 #define CONTROL_TIMEOUT_MS 500
170
171 // between wakeups
172 #define UNLINK_TIMEOUT_MS 3
173
174 /*-------------------------------------------------------------------------*/
175
176 // randomly generated ethernet address
177 static u8 node_id [ETH_ALEN];
178
179 // state we keep for each device we handle
180 struct usbnet {
181 // housekeeping
182 struct usb_device *udev;
183 struct driver_info *driver_info;
184 wait_queue_head_t *wait;
185
186 // i/o info: pipes etc
187 unsigned in, out;
188 struct usb_host_endpoint *status;
189 unsigned maxpacket;
190 struct timer_list delay;
191
192 // protocol/interface state
193 struct net_device *net;
194 struct net_device_stats stats;
195 int msg_enable;
196 unsigned long data [5];
197
198 struct mii_if_info mii;
199
200 // various kinds of pending driver work
201 struct sk_buff_head rxq;
202 struct sk_buff_head txq;
203 struct sk_buff_head done;
204 struct urb *interrupt;
205 struct tasklet_struct bh;
206
207 struct work_struct kevent;
208 unsigned long flags;
209 # define EVENT_TX_HALT 0
210 # define EVENT_RX_HALT 1
211 # define EVENT_RX_MEMORY 2
212 # define EVENT_STS_SPLIT 3
213 # define EVENT_LINK_RESET 4
214 };
215
216 // device-specific info used by the driver
217 struct driver_info {
218 char *description;
219
220 int flags;
221 /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
222 #define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
223 #define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
224 #define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
225 #define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */
226
227 #define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
228 #define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
229
230 #define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */
231
232 /* init device ... can sleep, or cause probe() failure */
233 int (*bind)(struct usbnet *, struct usb_interface *);
234
235 /* cleanup device ... can sleep, but can't fail */
236 void (*unbind)(struct usbnet *, struct usb_interface *);
237
238 /* reset device ... can sleep */
239 int (*reset)(struct usbnet *);
240
241 /* see if peer is connected ... can sleep */
242 int (*check_connect)(struct usbnet *);
243
244 /* for status polling */
245 void (*status)(struct usbnet *, struct urb *);
246
247 /* link reset handling, called from defer_kevent */
248 int (*link_reset)(struct usbnet *);
249
250 /* fixup rx packet (strip framing) */
251 int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
252
253 /* fixup tx packet (add framing) */
254 struct sk_buff *(*tx_fixup)(struct usbnet *dev,
255 struct sk_buff *skb, int flags);
256
257 // FIXME -- also an interrupt mechanism
258 // useful for at least PL2301/2302 and GL620USB-A
259 // and CDC use them to report 'is it connected' changes
260
261 /* for new devices, use the descriptor-reading code instead */
262 int in; /* rx endpoint */
263 int out; /* tx endpoint */
264
265 unsigned long data; /* Misc driver specific data */
266 };
267
268 // we record the state for each of our queued skbs
269 enum skb_state {
270 illegal = 0,
271 tx_start, tx_done,
272 rx_start, rx_done, rx_cleanup
273 };
274
275 struct skb_data { // skb->cb is one of these
276 struct urb *urb;
277 struct usbnet *dev;
278 enum skb_state state;
279 size_t length;
280 };
281
282 static const char driver_name [] = "usbnet";
283
284 /* use ethtool to change the level for any given device */
285 static int msg_level = -1;
286 module_param (msg_level, int, 0);
287 MODULE_PARM_DESC (msg_level, "Override default message level");
288
289
290 #ifdef DEBUG
291 #define devdbg(usbnet, fmt, arg...) \
292 printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
293 #else
294 #define devdbg(usbnet, fmt, arg...) do {} while(0)
295 #endif
296
297 #define deverr(usbnet, fmt, arg...) \
298 printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
299 #define devwarn(usbnet, fmt, arg...) \
300 printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg)
301
302 #define devinfo(usbnet, fmt, arg...) \
303 printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \
304
305 /*-------------------------------------------------------------------------*/
306
307 static void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *);
308 static u32 usbnet_get_link (struct net_device *);
309 static u32 usbnet_get_msglevel (struct net_device *);
310 static void usbnet_set_msglevel (struct net_device *, u32);
311 static void defer_kevent (struct usbnet *, int);
312
313 /* mostly for PDA style devices, which are always connected if present */
314 static int always_connected (struct usbnet *dev)
315 {
316 return 0;
317 }
318
319 /* handles CDC Ethernet and many other network "bulk data" interfaces */
320 static int
321 get_endpoints (struct usbnet *dev, struct usb_interface *intf)
322 {
323 int tmp;
324 struct usb_host_interface *alt = NULL;
325 struct usb_host_endpoint *in = NULL, *out = NULL;
326 struct usb_host_endpoint *status = NULL;
327
328 for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
329 unsigned ep;
330
331 in = out = status = NULL;
332 alt = intf->altsetting + tmp;
333
334 /* take the first altsetting with in-bulk + out-bulk;
335 * remember any status endpoint, just in case;
336 * ignore other endpoints and altsetttings.
337 */
338 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
339 struct usb_host_endpoint *e;
340 int intr = 0;
341
342 e = alt->endpoint + ep;
343 switch (e->desc.bmAttributes) {
344 case USB_ENDPOINT_XFER_INT:
345 if (!(e->desc.bEndpointAddress & USB_DIR_IN))
346 continue;
347 intr = 1;
348 /* FALLTHROUGH */
349 case USB_ENDPOINT_XFER_BULK:
350 break;
351 default:
352 continue;
353 }
354 if (e->desc.bEndpointAddress & USB_DIR_IN) {
355 if (!intr && !in)
356 in = e;
357 else if (intr && !status)
358 status = e;
359 } else {
360 if (!out)
361 out = e;
362 }
363 }
364 if (in && out)
365 break;
366 }
367 if (!alt || !in || !out)
368 return -EINVAL;
369
370 if (alt->desc.bAlternateSetting != 0
371 || !(dev->driver_info->flags & FLAG_NO_SETINT)) {
372 tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber,
373 alt->desc.bAlternateSetting);
374 if (tmp < 0)
375 return tmp;
376 }
377
378 dev->in = usb_rcvbulkpipe (dev->udev,
379 in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
380 dev->out = usb_sndbulkpipe (dev->udev,
381 out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
382 dev->status = status;
383 return 0;
384 }
385
386 static void intr_complete (struct urb *urb, struct pt_regs *regs);
387
388 static int init_status (struct usbnet *dev, struct usb_interface *intf)
389 {
390 char *buf = NULL;
391 unsigned pipe = 0;
392 unsigned maxp;
393 unsigned period;
394
395 if (!dev->driver_info->status)
396 return 0;
397
398 pipe = usb_rcvintpipe (dev->udev,
399 dev->status->desc.bEndpointAddress
400 & USB_ENDPOINT_NUMBER_MASK);
401 maxp = usb_maxpacket (dev->udev, pipe, 0);
402
403 /* avoid 1 msec chatter: min 8 msec poll rate */
404 period = max ((int) dev->status->desc.bInterval,
405 (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3);
406
407 buf = kmalloc (maxp, SLAB_KERNEL);
408 if (buf) {
409 dev->interrupt = usb_alloc_urb (0, SLAB_KERNEL);
410 if (!dev->interrupt) {
411 kfree (buf);
412 return -ENOMEM;
413 } else {
414 usb_fill_int_urb(dev->interrupt, dev->udev, pipe,
415 buf, maxp, intr_complete, dev, period);
416 dev_dbg(&intf->dev,
417 "status ep%din, %d bytes period %d\n",
418 usb_pipeendpoint(pipe), maxp, period);
419 }
420 }
421 return 0;
422 }
423
424 static void skb_return (struct usbnet *dev, struct sk_buff *skb)
425 {
426 int status;
427
428 skb->dev = dev->net;
429 skb->protocol = eth_type_trans (skb, dev->net);
430 dev->stats.rx_packets++;
431 dev->stats.rx_bytes += skb->len;
432
433 if (netif_msg_rx_status (dev))
434 devdbg (dev, "< rx, len %zu, type 0x%x",
435 skb->len + sizeof (struct ethhdr), skb->protocol);
436 memset (skb->cb, 0, sizeof (struct skb_data));
437 status = netif_rx (skb);
438 if (status != NET_RX_SUCCESS && netif_msg_rx_err (dev))
439 devdbg (dev, "netif_rx status %d", status);
440 }
441
442 \f
443 #ifdef CONFIG_USB_ALI_M5632
444 #define HAVE_HARDWARE
445
446 /*-------------------------------------------------------------------------
447 *
448 * ALi M5632 driver ... does high speed
449 *
450 *-------------------------------------------------------------------------*/
451
452 static const struct driver_info ali_m5632_info = {
453 .description = "ALi M5632",
454 };
455
456
457 #endif
458
459 \f
460 #ifdef CONFIG_USB_AN2720
461 #define HAVE_HARDWARE
462
463 /*-------------------------------------------------------------------------
464 *
465 * AnchorChips 2720 driver ... http://www.cypress.com
466 *
467 * This doesn't seem to have a way to detect whether the peer is
468 * connected, or need any reset handshaking. It's got pretty big
469 * internal buffers (handles most of a frame's worth of data).
470 * Chip data sheets don't describe any vendor control messages.
471 *
472 *-------------------------------------------------------------------------*/
473
474 static const struct driver_info an2720_info = {
475 .description = "AnchorChips/Cypress 2720",
476 // no reset available!
477 // no check_connect available!
478
479 .in = 2, .out = 2, // direction distinguishes these
480 };
481
482 #endif /* CONFIG_USB_AN2720 */
483
484 \f
485 #ifdef CONFIG_USB_AX8817X
486 /* ASIX AX8817X based USB 2.0 Ethernet Devices */
487
488 #define HAVE_HARDWARE
489 #define NEED_MII
490
491 #include <linux/crc32.h>
492
493 #define AX_CMD_SET_SW_MII 0x06
494 #define AX_CMD_READ_MII_REG 0x07
495 #define AX_CMD_WRITE_MII_REG 0x08
496 #define AX_CMD_SET_HW_MII 0x0a
497 #define AX_CMD_READ_EEPROM 0x0b
498 #define AX_CMD_WRITE_EEPROM 0x0c
499 #define AX_CMD_WRITE_ENABLE 0x0d
500 #define AX_CMD_WRITE_DISABLE 0x0e
501 #define AX_CMD_WRITE_RX_CTL 0x10
502 #define AX_CMD_READ_IPG012 0x11
503 #define AX_CMD_WRITE_IPG0 0x12
504 #define AX_CMD_WRITE_IPG1 0x13
505 #define AX_CMD_WRITE_IPG2 0x14
506 #define AX_CMD_WRITE_MULTI_FILTER 0x16
507 #define AX_CMD_READ_NODE_ID 0x17
508 #define AX_CMD_READ_PHY_ID 0x19
509 #define AX_CMD_READ_MEDIUM_STATUS 0x1a
510 #define AX_CMD_WRITE_MEDIUM_MODE 0x1b
511 #define AX_CMD_READ_MONITOR_MODE 0x1c
512 #define AX_CMD_WRITE_MONITOR_MODE 0x1d
513 #define AX_CMD_WRITE_GPIOS 0x1f
514 #define AX_CMD_SW_RESET 0x20
515 #define AX_CMD_SW_PHY_STATUS 0x21
516 #define AX_CMD_SW_PHY_SELECT 0x22
517 #define AX88772_CMD_READ_NODE_ID 0x13
518
519 #define AX_MONITOR_MODE 0x01
520 #define AX_MONITOR_LINK 0x02
521 #define AX_MONITOR_MAGIC 0x04
522 #define AX_MONITOR_HSFS 0x10
523
524 /* AX88172 Medium Status Register values */
525 #define AX_MEDIUM_FULL_DUPLEX 0x02
526 #define AX_MEDIUM_TX_ABORT_ALLOW 0x04
527 #define AX_MEDIUM_FLOW_CONTROL_EN 0x10
528
529 #define AX_MCAST_FILTER_SIZE 8
530 #define AX_MAX_MCAST 64
531
532 #define AX_EEPROM_LEN 0x40
533
534 #define AX_SWRESET_CLEAR 0x00
535 #define AX_SWRESET_RR 0x01
536 #define AX_SWRESET_RT 0x02
537 #define AX_SWRESET_PRTE 0x04
538 #define AX_SWRESET_PRL 0x08
539 #define AX_SWRESET_BZ 0x10
540 #define AX_SWRESET_IPRL 0x20
541 #define AX_SWRESET_IPPD 0x40
542
543 #define AX88772_IPG0_DEFAULT 0x15
544 #define AX88772_IPG1_DEFAULT 0x0c
545 #define AX88772_IPG2_DEFAULT 0x12
546
547 #define AX88772_MEDIUM_FULL_DUPLEX 0x0002
548 #define AX88772_MEDIUM_RESERVED 0x0004
549 #define AX88772_MEDIUM_RX_FC_ENABLE 0x0010
550 #define AX88772_MEDIUM_TX_FC_ENABLE 0x0020
551 #define AX88772_MEDIUM_PAUSE_FORMAT 0x0080
552 #define AX88772_MEDIUM_RX_ENABLE 0x0100
553 #define AX88772_MEDIUM_100MB 0x0200
554 #define AX88772_MEDIUM_DEFAULT \
555 (AX88772_MEDIUM_FULL_DUPLEX | AX88772_MEDIUM_RX_FC_ENABLE | \
556 AX88772_MEDIUM_TX_FC_ENABLE | AX88772_MEDIUM_100MB | \
557 AX88772_MEDIUM_RESERVED | AX88772_MEDIUM_RX_ENABLE )
558
559 #define AX_EEPROM_MAGIC 0xdeadbeef
560
561 /* This structure cannot exceed sizeof(unsigned long [5]) AKA 20 bytes */
562 struct ax8817x_data {
563 u8 multi_filter[AX_MCAST_FILTER_SIZE];
564 };
565
566 struct ax88172_int_data {
567 u16 res1;
568 u8 link;
569 u16 res2;
570 u8 status;
571 u16 res3;
572 } __attribute__ ((packed));
573
574 static int ax8817x_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
575 u16 size, void *data)
576 {
577 return usb_control_msg(
578 dev->udev,
579 usb_rcvctrlpipe(dev->udev, 0),
580 cmd,
581 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
582 value,
583 index,
584 data,
585 size,
586 CONTROL_TIMEOUT_MS);
587 }
588
589 static int ax8817x_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
590 u16 size, void *data)
591 {
592 return usb_control_msg(
593 dev->udev,
594 usb_sndctrlpipe(dev->udev, 0),
595 cmd,
596 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
597 value,
598 index,
599 data,
600 size,
601 CONTROL_TIMEOUT_MS);
602 }
603
604 static void ax8817x_async_cmd_callback(struct urb *urb, struct pt_regs *regs)
605 {
606 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
607
608 if (urb->status < 0)
609 printk(KERN_DEBUG "ax8817x_async_cmd_callback() failed with %d",
610 urb->status);
611
612 kfree(req);
613 usb_free_urb(urb);
614 }
615
616 static void ax8817x_status(struct usbnet *dev, struct urb *urb)
617 {
618 struct ax88172_int_data *event;
619 int link;
620
621 if (urb->actual_length < 8)
622 return;
623
624 event = urb->transfer_buffer;
625 link = event->link & 0x01;
626 if (netif_carrier_ok(dev->net) != link) {
627 if (link) {
628 netif_carrier_on(dev->net);
629 defer_kevent (dev, EVENT_LINK_RESET );
630 } else
631 netif_carrier_off(dev->net);
632 devdbg(dev, "ax8817x - Link Status is: %d", link);
633 }
634 }
635
636 static void ax8817x_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
637 u16 size, void *data)
638 {
639 struct usb_ctrlrequest *req;
640 int status;
641 struct urb *urb;
642
643 if ((urb = usb_alloc_urb(0, GFP_ATOMIC)) == NULL) {
644 devdbg(dev, "Error allocating URB in write_cmd_async!");
645 return;
646 }
647
648 if ((req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC)) == NULL) {
649 deverr(dev, "Failed to allocate memory for control request");
650 usb_free_urb(urb);
651 return;
652 }
653
654 req->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
655 req->bRequest = cmd;
656 req->wValue = cpu_to_le16(value);
657 req->wIndex = cpu_to_le16(index);
658 req->wLength = cpu_to_le16(size);
659
660 usb_fill_control_urb(urb, dev->udev,
661 usb_sndctrlpipe(dev->udev, 0),
662 (void *)req, data, size,
663 ax8817x_async_cmd_callback, req);
664
665 if((status = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
666 deverr(dev, "Error submitting the control message: status=%d", status);
667 kfree(req);
668 usb_free_urb(urb);
669 }
670 }
671
672 static void ax8817x_set_multicast(struct net_device *net)
673 {
674 struct usbnet *dev = netdev_priv(net);
675 struct ax8817x_data *data = (struct ax8817x_data *)&dev->data;
676 u8 rx_ctl = 0x8c;
677
678 if (net->flags & IFF_PROMISC) {
679 rx_ctl |= 0x01;
680 } else if (net->flags & IFF_ALLMULTI
681 || net->mc_count > AX_MAX_MCAST) {
682 rx_ctl |= 0x02;
683 } else if (net->mc_count == 0) {
684 /* just broadcast and directed */
685 } else {
686 /* We use the 20 byte dev->data
687 * for our 8 byte filter buffer
688 * to avoid allocating memory that
689 * is tricky to free later */
690 struct dev_mc_list *mc_list = net->mc_list;
691 u32 crc_bits;
692 int i;
693
694 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
695
696 /* Build the multicast hash filter. */
697 for (i = 0; i < net->mc_count; i++) {
698 crc_bits =
699 ether_crc(ETH_ALEN,
700 mc_list->dmi_addr) >> 26;
701 data->multi_filter[crc_bits >> 3] |=
702 1 << (crc_bits & 7);
703 mc_list = mc_list->next;
704 }
705
706 ax8817x_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
707 AX_MCAST_FILTER_SIZE, data->multi_filter);
708
709 rx_ctl |= 0x10;
710 }
711
712 ax8817x_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
713 }
714
715 static int ax8817x_mdio_read(struct net_device *netdev, int phy_id, int loc)
716 {
717 struct usbnet *dev = netdev_priv(netdev);
718 u16 res;
719 u8 buf[1];
720
721 ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
722 ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res);
723 ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
724
725 return res & 0xffff;
726 }
727
728 static void ax8817x_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
729 {
730 struct usbnet *dev = netdev_priv(netdev);
731 u16 res = val;
732 u8 buf[1];
733
734 ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
735 ax8817x_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res);
736 ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
737 }
738
739 static int ax88172_link_reset(struct usbnet *dev)
740 {
741 u16 lpa;
742 u8 mode;
743
744 mode = AX_MEDIUM_TX_ABORT_ALLOW | AX_MEDIUM_FLOW_CONTROL_EN;
745 lpa = ax8817x_mdio_read(dev->net, dev->mii.phy_id, MII_LPA);
746 if (lpa & LPA_DUPLEX)
747 mode |= AX_MEDIUM_FULL_DUPLEX;
748 ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
749
750 return 0;
751 }
752
753 static void ax8817x_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
754 {
755 struct usbnet *dev = netdev_priv(net);
756 u8 opt;
757
758 if (ax8817x_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
759 wolinfo->supported = 0;
760 wolinfo->wolopts = 0;
761 return;
762 }
763 wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
764 wolinfo->wolopts = 0;
765 if (opt & AX_MONITOR_MODE) {
766 if (opt & AX_MONITOR_LINK)
767 wolinfo->wolopts |= WAKE_PHY;
768 if (opt & AX_MONITOR_MAGIC)
769 wolinfo->wolopts |= WAKE_MAGIC;
770 }
771 }
772
773 static int ax8817x_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
774 {
775 struct usbnet *dev = netdev_priv(net);
776 u8 opt = 0;
777 u8 buf[1];
778
779 if (wolinfo->wolopts & WAKE_PHY)
780 opt |= AX_MONITOR_LINK;
781 if (wolinfo->wolopts & WAKE_MAGIC)
782 opt |= AX_MONITOR_MAGIC;
783 if (opt != 0)
784 opt |= AX_MONITOR_MODE;
785
786 if (ax8817x_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
787 opt, 0, 0, &buf) < 0)
788 return -EINVAL;
789
790 return 0;
791 }
792
793 static int ax8817x_get_eeprom_len(struct net_device *net)
794 {
795 return AX_EEPROM_LEN;
796 }
797
798 static int ax8817x_get_eeprom(struct net_device *net,
799 struct ethtool_eeprom *eeprom, u8 *data)
800 {
801 struct usbnet *dev = netdev_priv(net);
802 u16 *ebuf = (u16 *)data;
803 int i;
804
805 /* Crude hack to ensure that we don't overwrite memory
806 * if an odd length is supplied
807 */
808 if (eeprom->len % 2)
809 return -EINVAL;
810
811 eeprom->magic = AX_EEPROM_MAGIC;
812
813 /* ax8817x returns 2 bytes from eeprom on read */
814 for (i=0; i < eeprom->len / 2; i++) {
815 if (ax8817x_read_cmd(dev, AX_CMD_READ_EEPROM,
816 eeprom->offset + i, 0, 2, &ebuf[i]) < 0)
817 return -EINVAL;
818 }
819 return 0;
820 }
821
822 static void ax8817x_get_drvinfo (struct net_device *net,
823 struct ethtool_drvinfo *info)
824 {
825 /* Inherit standard device info */
826 usbnet_get_drvinfo(net, info);
827 info->eedump_len = 0x3e;
828 }
829
830 static int ax8817x_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
831 {
832 struct usbnet *dev = netdev_priv(net);
833
834 return mii_ethtool_gset(&dev->mii,cmd);
835 }
836
837 static int ax8817x_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
838 {
839 struct usbnet *dev = netdev_priv(net);
840
841 return mii_ethtool_sset(&dev->mii,cmd);
842 }
843
844 /* We need to override some ethtool_ops so we require our
845 own structure so we don't interfere with other usbnet
846 devices that may be connected at the same time. */
847 static struct ethtool_ops ax8817x_ethtool_ops = {
848 .get_drvinfo = ax8817x_get_drvinfo,
849 .get_link = ethtool_op_get_link,
850 .get_msglevel = usbnet_get_msglevel,
851 .set_msglevel = usbnet_set_msglevel,
852 .get_wol = ax8817x_get_wol,
853 .set_wol = ax8817x_set_wol,
854 .get_eeprom_len = ax8817x_get_eeprom_len,
855 .get_eeprom = ax8817x_get_eeprom,
856 .get_settings = ax8817x_get_settings,
857 .set_settings = ax8817x_set_settings,
858 };
859
860 static int ax8817x_bind(struct usbnet *dev, struct usb_interface *intf)
861 {
862 int ret = 0;
863 void *buf;
864 int i;
865 unsigned long gpio_bits = dev->driver_info->data;
866
867 get_endpoints(dev,intf);
868
869 buf = kmalloc(ETH_ALEN, GFP_KERNEL);
870 if(!buf) {
871 ret = -ENOMEM;
872 goto out1;
873 }
874
875 /* Toggle the GPIOs in a manufacturer/model specific way */
876 for (i = 2; i >= 0; i--) {
877 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
878 (gpio_bits >> (i * 8)) & 0xff, 0, 0,
879 buf)) < 0)
880 goto out2;
881 msleep(5);
882 }
883
884 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x80, 0, 0, buf)) < 0) {
885 dbg("send AX_CMD_WRITE_RX_CTL failed: %d", ret);
886 goto out2;
887 }
888
889 /* Get the MAC address */
890 memset(buf, 0, ETH_ALEN);
891 if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, 6, buf)) < 0) {
892 dbg("read AX_CMD_READ_NODE_ID failed: %d", ret);
893 goto out2;
894 }
895 memcpy(dev->net->dev_addr, buf, ETH_ALEN);
896
897 /* Get the PHY id */
898 if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf)) < 0) {
899 dbg("error on read AX_CMD_READ_PHY_ID: %02x", ret);
900 goto out2;
901 } else if (ret < 2) {
902 /* this should always return 2 bytes */
903 dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x", ret);
904 ret = -EIO;
905 goto out2;
906 }
907
908 /* Initialize MII structure */
909 dev->mii.dev = dev->net;
910 dev->mii.mdio_read = ax8817x_mdio_read;
911 dev->mii.mdio_write = ax8817x_mdio_write;
912 dev->mii.phy_id_mask = 0x3f;
913 dev->mii.reg_num_mask = 0x1f;
914 dev->mii.phy_id = *((u8 *)buf + 1);
915
916 dev->net->set_multicast_list = ax8817x_set_multicast;
917 dev->net->ethtool_ops = &ax8817x_ethtool_ops;
918
919 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
920 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
921 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
922 mii_nway_restart(&dev->mii);
923
924 return 0;
925 out2:
926 kfree(buf);
927 out1:
928 return ret;
929 }
930
931 static struct ethtool_ops ax88772_ethtool_ops = {
932 .get_drvinfo = ax8817x_get_drvinfo,
933 .get_link = ethtool_op_get_link,
934 .get_msglevel = usbnet_get_msglevel,
935 .set_msglevel = usbnet_set_msglevel,
936 .get_wol = ax8817x_get_wol,
937 .set_wol = ax8817x_set_wol,
938 .get_eeprom_len = ax8817x_get_eeprom_len,
939 .get_eeprom = ax8817x_get_eeprom,
940 .get_settings = ax8817x_get_settings,
941 .set_settings = ax8817x_set_settings,
942 };
943
944 static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
945 {
946 int ret;
947 void *buf;
948
949 get_endpoints(dev,intf);
950
951 buf = kmalloc(6, GFP_KERNEL);
952 if(!buf) {
953 dbg ("Cannot allocate memory for buffer");
954 ret = -ENOMEM;
955 goto out1;
956 }
957
958 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
959 0x00B0, 0, 0, buf)) < 0)
960 goto out2;
961
962 msleep(5);
963 if ((ret = ax8817x_write_cmd(dev, AX_CMD_SW_PHY_SELECT, 0x0001, 0, 0, buf)) < 0) {
964 dbg("Select PHY #1 failed: %d", ret);
965 goto out2;
966 }
967
968 if ((ret =
969 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPPD, 0, 0, buf)) < 0) {
970 dbg("Failed to power down internal PHY: %d", ret);
971 goto out2;
972 }
973
974 msleep(150);
975 if ((ret =
976 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_CLEAR, 0, 0, buf)) < 0) {
977 dbg("Failed to perform software reset: %d", ret);
978 goto out2;
979 }
980
981 msleep(150);
982 if ((ret =
983 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPRL | AX_SWRESET_PRL, 0, 0, buf)) < 0) {
984 dbg("Failed to set Internal/External PHY reset control: %d", ret);
985 goto out2;
986 }
987
988 msleep(150);
989 if ((ret =
990 ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x0000, 0, 0,
991 buf)) < 0) {
992 dbg("Failed to reset RX_CTL: %d", ret);
993 goto out2;
994 }
995
996 /* Get the MAC address */
997 memset(buf, 0, ETH_ALEN);
998 if ((ret = ax8817x_read_cmd(dev, AX88772_CMD_READ_NODE_ID, 0, 0, ETH_ALEN, buf)) < 0) {
999 dbg("Failed to read MAC address: %d", ret);
1000 goto out2;
1001 }
1002 memcpy(dev->net->dev_addr, buf, ETH_ALEN);
1003
1004 if ((ret = ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, buf)) < 0) {
1005 dbg("Enabling software MII failed: %d", ret);
1006 goto out2;
1007 }
1008
1009 if (((ret =
1010 ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG, 0x0010, 2, 2, buf)) < 0)
1011 || (*((u16 *)buf) != 0x003b)) {
1012 dbg("Read PHY register 2 must be 0x3b00: %d", ret);
1013 goto out2;
1014 }
1015
1016 /* Initialize MII structure */
1017 dev->mii.dev = dev->net;
1018 dev->mii.mdio_read = ax8817x_mdio_read;
1019 dev->mii.mdio_write = ax8817x_mdio_write;
1020 dev->mii.phy_id_mask = 0xff;
1021 dev->mii.reg_num_mask = 0xff;
1022
1023 /* Get the PHY id */
1024 if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf)) < 0) {
1025 dbg("Error reading PHY ID: %02x", ret);
1026 goto out2;
1027 } else if (ret < 2) {
1028 /* this should always return 2 bytes */
1029 dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x",
1030 ret);
1031 ret = -EIO;
1032 goto out2;
1033 }
1034 dev->mii.phy_id = *((u8 *)buf + 1);
1035
1036 if ((ret =
1037 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_PRL, 0, 0, buf)) < 0) {
1038 dbg("Set external PHY reset pin level: %d", ret);
1039 goto out2;
1040 }
1041 msleep(150);
1042 if ((ret =
1043 ax8817x_write_cmd(dev, AX_CMD_SW_RESET, AX_SWRESET_IPRL | AX_SWRESET_PRL, 0, 0, buf)) < 0) {
1044 dbg("Set Internal/External PHY reset control: %d", ret);
1045 goto out2;
1046 }
1047 msleep(150);
1048
1049
1050 dev->net->set_multicast_list = ax8817x_set_multicast;
1051 dev->net->ethtool_ops = &ax88772_ethtool_ops;
1052
1053 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1054 ax8817x_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1055 ADVERTISE_ALL | ADVERTISE_CSMA);
1056 mii_nway_restart(&dev->mii);
1057
1058 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, AX88772_MEDIUM_DEFAULT, 0, 0, buf)) < 0) {
1059 dbg("Write medium mode register: %d", ret);
1060 goto out2;
1061 }
1062
1063 if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_IPG0, AX88772_IPG0_DEFAULT | AX88772_IPG1_DEFAULT,AX88772_IPG2_DEFAULT, 0, buf)) < 0) {
1064 dbg("Write IPG,IPG1,IPG2 failed: %d", ret);
1065 goto out2;
1066 }
1067 if ((ret =
1068 ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf)) < 0) {
1069 dbg("Failed to set hardware MII: %02x", ret);
1070 goto out2;
1071 }
1072
1073 /* Set RX_CTL to default values with 2k buffer, and enable cactus */
1074 if ((ret =
1075 ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x0088, 0, 0,
1076 buf)) < 0) {
1077 dbg("Reset RX_CTL failed: %d", ret);
1078 goto out2;
1079 }
1080
1081 kfree(buf);
1082
1083 return 0;
1084
1085 out2:
1086 kfree(buf);
1087 out1:
1088 return ret;
1089 }
1090
1091 static int ax88772_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1092 {
1093 u32 *header;
1094 char *packet;
1095 struct sk_buff *ax_skb;
1096 u16 size;
1097
1098 header = (u32 *) skb->data;
1099 le32_to_cpus(header);
1100 packet = (char *)(header + 1);
1101
1102 skb_pull(skb, 4);
1103
1104 while (skb->len > 0) {
1105 if ((short)(*header & 0x0000ffff) !=
1106 ~((short)((*header & 0xffff0000) >> 16))) {
1107 devdbg(dev,"header length data is error");
1108 }
1109 /* get the packet length */
1110 size = (u16) (*header & 0x0000ffff);
1111
1112 if ((skb->len) - ((size + 1) & 0xfffe) == 0)
1113 return 2;
1114 if (size > ETH_FRAME_LEN) {
1115 devdbg(dev,"invalid rx length %d", size);
1116 return 0;
1117 }
1118 ax_skb = skb_clone(skb, GFP_ATOMIC);
1119 if (ax_skb) {
1120 ax_skb->len = size;
1121 ax_skb->data = packet;
1122 ax_skb->tail = packet + size;
1123 skb_return(dev, ax_skb);
1124 } else {
1125 return 0;
1126 }
1127
1128 skb_pull(skb, (size + 1) & 0xfffe);
1129
1130 if (skb->len == 0)
1131 break;
1132
1133 header = (u32 *) skb->data;
1134 le32_to_cpus(header);
1135 packet = (char *)(header + 1);
1136 skb_pull(skb, 4);
1137 }
1138
1139 if (skb->len < 0) {
1140 devdbg(dev,"invalid rx length %d", skb->len);
1141 return 0;
1142 }
1143 return 1;
1144 }
1145
1146 static struct sk_buff *ax88772_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
1147 int flags)
1148 {
1149 int padlen;
1150 int headroom = skb_headroom(skb);
1151 int tailroom = skb_tailroom(skb);
1152 u32 *packet_len;
1153 u32 *padbytes_ptr;
1154
1155 padlen = ((skb->len + 4) % 512) ? 0 : 4;
1156
1157 if ((!skb_cloned(skb))
1158 && ((headroom + tailroom) >= (4 + padlen))) {
1159 if ((headroom < 4) || (tailroom < padlen)) {
1160 skb->data = memmove(skb->head + 4, skb->data, skb->len);
1161 skb->tail = skb->data + skb->len;
1162 }
1163 } else {
1164 struct sk_buff *skb2;
1165 skb2 = skb_copy_expand(skb, 4, padlen, flags);
1166 dev_kfree_skb_any(skb);
1167 skb = skb2;
1168 if (!skb)
1169 return NULL;
1170 }
1171
1172 packet_len = (u32 *) skb_push(skb, 4);
1173
1174 packet_len = (u32 *) skb->data;
1175 *packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
1176
1177 if ((skb->len % 512) == 0) {
1178 padbytes_ptr = (u32 *) skb->tail;
1179 *padbytes_ptr = 0xffff0000;
1180 skb_put(skb, padlen);
1181 }
1182 return skb;
1183 }
1184
1185 static int ax88772_link_reset(struct usbnet *dev)
1186 {
1187 u16 lpa;
1188 u16 mode;
1189
1190 mode = AX88772_MEDIUM_DEFAULT;
1191 lpa = ax8817x_mdio_read(dev->net, dev->mii.phy_id, MII_LPA);
1192
1193 if ((lpa & LPA_DUPLEX) == 0)
1194 mode &= ~AX88772_MEDIUM_FULL_DUPLEX;
1195 if ((lpa & LPA_100) == 0)
1196 mode &= ~AX88772_MEDIUM_100MB;
1197 ax8817x_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
1198
1199 return 0;
1200 }
1201
1202 static const struct driver_info ax8817x_info = {
1203 .description = "ASIX AX8817x USB 2.0 Ethernet",
1204 .bind = ax8817x_bind,
1205 .status = ax8817x_status,
1206 .link_reset = ax88172_link_reset,
1207 .reset = ax88172_link_reset,
1208 .flags = FLAG_ETHER,
1209 .data = 0x00130103,
1210 };
1211
1212 static const struct driver_info dlink_dub_e100_info = {
1213 .description = "DLink DUB-E100 USB Ethernet",
1214 .bind = ax8817x_bind,
1215 .status = ax8817x_status,
1216 .link_reset = ax88172_link_reset,
1217 .reset = ax88172_link_reset,
1218 .flags = FLAG_ETHER,
1219 .data = 0x009f9d9f,
1220 };
1221
1222 static const struct driver_info netgear_fa120_info = {
1223 .description = "Netgear FA-120 USB Ethernet",
1224 .bind = ax8817x_bind,
1225 .status = ax8817x_status,
1226 .link_reset = ax88172_link_reset,
1227 .reset = ax88172_link_reset,
1228 .flags = FLAG_ETHER,
1229 .data = 0x00130103,
1230 };
1231
1232 static const struct driver_info hawking_uf200_info = {
1233 .description = "Hawking UF200 USB Ethernet",
1234 .bind = ax8817x_bind,
1235 .status = ax8817x_status,
1236 .link_reset = ax88172_link_reset,
1237 .reset = ax88172_link_reset,
1238 .flags = FLAG_ETHER,
1239 .data = 0x001f1d1f,
1240 };
1241
1242 static const struct driver_info ax88772_info = {
1243 .description = "ASIX AX88772 USB 2.0 Ethernet",
1244 .bind = ax88772_bind,
1245 .status = ax8817x_status,
1246 .link_reset = ax88772_link_reset,
1247 .reset = ax88772_link_reset,
1248 .flags = FLAG_ETHER | FLAG_FRAMING_AX,
1249 .rx_fixup = ax88772_rx_fixup,
1250 .tx_fixup = ax88772_tx_fixup,
1251 .data = 0x00130103,
1252 };
1253
1254 #endif /* CONFIG_USB_AX8817X */
1255
1256
1257 \f
1258 #ifdef CONFIG_USB_BELKIN
1259 #define HAVE_HARDWARE
1260
1261 /*-------------------------------------------------------------------------
1262 *
1263 * Belkin F5U104 ... two NetChip 2280 devices + Atmel microcontroller
1264 *
1265 * ... also two eTEK designs, including one sold as "Advance USBNET"
1266 *
1267 *-------------------------------------------------------------------------*/
1268
1269 static const struct driver_info belkin_info = {
1270 .description = "Belkin, eTEK, or compatible",
1271 };
1272
1273 #endif /* CONFIG_USB_BELKIN */
1274
1275
1276 \f
1277 /*-------------------------------------------------------------------------
1278 *
1279 * Communications Device Class declarations.
1280 * Used by CDC Ethernet, and some CDC variants
1281 *
1282 *-------------------------------------------------------------------------*/
1283
1284 #ifdef CONFIG_USB_CDCETHER
1285 #define NEED_GENERIC_CDC
1286 #endif
1287
1288 #ifdef CONFIG_USB_ZAURUS
1289 /* Ethernet variant uses funky framing, broken ethernet addressing */
1290 #define NEED_GENERIC_CDC
1291 #endif
1292
1293 #ifdef CONFIG_USB_RNDIS
1294 /* ACM variant uses even funkier framing, complex control RPC scheme */
1295 #define NEED_GENERIC_CDC
1296 #endif
1297
1298
1299 #ifdef NEED_GENERIC_CDC
1300
1301 #include <linux/usb_cdc.h>
1302
1303 struct cdc_state {
1304 struct usb_cdc_header_desc *header;
1305 struct usb_cdc_union_desc *u;
1306 struct usb_cdc_ether_desc *ether;
1307 struct usb_interface *control;
1308 struct usb_interface *data;
1309 };
1310
1311 static struct usb_driver usbnet_driver;
1312
1313 /*
1314 * probes control interface, claims data interface, collects the bulk
1315 * endpoints, activates data interface (if needed), maybe sets MTU.
1316 * all pure cdc, except for certain firmware workarounds.
1317 */
1318 static int generic_cdc_bind (struct usbnet *dev, struct usb_interface *intf)
1319 {
1320 u8 *buf = intf->cur_altsetting->extra;
1321 int len = intf->cur_altsetting->extralen;
1322 struct usb_interface_descriptor *d;
1323 struct cdc_state *info = (void *) &dev->data;
1324 int status;
1325 int rndis;
1326
1327 if (sizeof dev->data < sizeof *info)
1328 return -EDOM;
1329
1330 /* expect strict spec conformance for the descriptors, but
1331 * cope with firmware which stores them in the wrong place
1332 */
1333 if (len == 0 && dev->udev->actconfig->extralen) {
1334 /* Motorola SB4100 (and others: Brad Hards says it's
1335 * from a Broadcom design) put CDC descriptors here
1336 */
1337 buf = dev->udev->actconfig->extra;
1338 len = dev->udev->actconfig->extralen;
1339 if (len)
1340 dev_dbg (&intf->dev,
1341 "CDC descriptors on config\n");
1342 }
1343
1344 /* this assumes that if there's a non-RNDIS vendor variant
1345 * of cdc-acm, it'll fail RNDIS requests cleanly.
1346 */
1347 rndis = (intf->cur_altsetting->desc.bInterfaceProtocol == 0xff);
1348
1349 memset (info, 0, sizeof *info);
1350 info->control = intf;
1351 while (len > 3) {
1352 if (buf [1] != USB_DT_CS_INTERFACE)
1353 goto next_desc;
1354
1355 /* use bDescriptorSubType to identify the CDC descriptors.
1356 * We expect devices with CDC header and union descriptors.
1357 * For CDC Ethernet we need the ethernet descriptor.
1358 * For RNDIS, ignore two (pointless) CDC modem descriptors
1359 * in favor of a complicated OID-based RPC scheme doing what
1360 * CDC Ethernet achieves with a simple descriptor.
1361 */
1362 switch (buf [2]) {
1363 case USB_CDC_HEADER_TYPE:
1364 if (info->header) {
1365 dev_dbg (&intf->dev, "extra CDC header\n");
1366 goto bad_desc;
1367 }
1368 info->header = (void *) buf;
1369 if (info->header->bLength != sizeof *info->header) {
1370 dev_dbg (&intf->dev, "CDC header len %u\n",
1371 info->header->bLength);
1372 goto bad_desc;
1373 }
1374 break;
1375 case USB_CDC_UNION_TYPE:
1376 if (info->u) {
1377 dev_dbg (&intf->dev, "extra CDC union\n");
1378 goto bad_desc;
1379 }
1380 info->u = (void *) buf;
1381 if (info->u->bLength != sizeof *info->u) {
1382 dev_dbg (&intf->dev, "CDC union len %u\n",
1383 info->u->bLength);
1384 goto bad_desc;
1385 }
1386
1387 /* we need a master/control interface (what we're
1388 * probed with) and a slave/data interface; union
1389 * descriptors sort this all out.
1390 */
1391 info->control = usb_ifnum_to_if(dev->udev,
1392 info->u->bMasterInterface0);
1393 info->data = usb_ifnum_to_if(dev->udev,
1394 info->u->bSlaveInterface0);
1395 if (!info->control || !info->data) {
1396 dev_dbg (&intf->dev,
1397 "master #%u/%p slave #%u/%p\n",
1398 info->u->bMasterInterface0,
1399 info->control,
1400 info->u->bSlaveInterface0,
1401 info->data);
1402 goto bad_desc;
1403 }
1404 if (info->control != intf) {
1405 dev_dbg (&intf->dev, "bogus CDC Union\n");
1406 /* Ambit USB Cable Modem (and maybe others)
1407 * interchanges master and slave interface.
1408 */
1409 if (info->data == intf) {
1410 info->data = info->control;
1411 info->control = intf;
1412 } else
1413 goto bad_desc;
1414 }
1415
1416 /* a data interface altsetting does the real i/o */
1417 d = &info->data->cur_altsetting->desc;
1418 if (d->bInterfaceClass != USB_CLASS_CDC_DATA) {
1419 dev_dbg (&intf->dev, "slave class %u\n",
1420 d->bInterfaceClass);
1421 goto bad_desc;
1422 }
1423 break;
1424 case USB_CDC_ETHERNET_TYPE:
1425 if (info->ether) {
1426 dev_dbg (&intf->dev, "extra CDC ether\n");
1427 goto bad_desc;
1428 }
1429 info->ether = (void *) buf;
1430 if (info->ether->bLength != sizeof *info->ether) {
1431 dev_dbg (&intf->dev, "CDC ether len %u\n",
1432 info->u->bLength);
1433 goto bad_desc;
1434 }
1435 dev->net->mtu = le16_to_cpup (
1436 &info->ether->wMaxSegmentSize)
1437 - ETH_HLEN;
1438 /* because of Zaurus, we may be ignoring the host
1439 * side link address we were given.
1440 */
1441 break;
1442 }
1443 next_desc:
1444 len -= buf [0]; /* bLength */
1445 buf += buf [0];
1446 }
1447
1448 if (!info->header || !info->u || (!rndis && !info->ether)) {
1449 dev_dbg (&intf->dev, "missing cdc %s%s%sdescriptor\n",
1450 info->header ? "" : "header ",
1451 info->u ? "" : "union ",
1452 info->ether ? "" : "ether ");
1453 goto bad_desc;
1454 }
1455
1456 /* claim data interface and set it up ... with side effects.
1457 * network traffic can't flow until an altsetting is enabled.
1458 */
1459 status = usb_driver_claim_interface (&usbnet_driver, info->data, dev);
1460 if (status < 0)
1461 return status;
1462 status = get_endpoints (dev, info->data);
1463 if (status < 0) {
1464 /* ensure immediate exit from usbnet_disconnect */
1465 usb_set_intfdata(info->data, NULL);
1466 usb_driver_release_interface (&usbnet_driver, info->data);
1467 return status;
1468 }
1469
1470 /* status endpoint: optional for CDC Ethernet, not RNDIS (or ACM) */
1471 dev->status = NULL;
1472 if (info->control->cur_altsetting->desc.bNumEndpoints == 1) {
1473 struct usb_endpoint_descriptor *desc;
1474
1475 dev->status = &info->control->cur_altsetting->endpoint [0];
1476 desc = &dev->status->desc;
1477 if (desc->bmAttributes != USB_ENDPOINT_XFER_INT
1478 || !(desc->bEndpointAddress & USB_DIR_IN)
1479 || (le16_to_cpu(desc->wMaxPacketSize)
1480 < sizeof (struct usb_cdc_notification))
1481 || !desc->bInterval) {
1482 dev_dbg (&intf->dev, "bad notification endpoint\n");
1483 dev->status = NULL;
1484 }
1485 }
1486 if (rndis && !dev->status) {
1487 dev_dbg (&intf->dev, "missing RNDIS status endpoint\n");
1488 usb_set_intfdata(info->data, NULL);
1489 usb_driver_release_interface (&usbnet_driver, info->data);
1490 return -ENODEV;
1491 }
1492 return 0;
1493
1494 bad_desc:
1495 dev_info (&dev->udev->dev, "bad CDC descriptors\n");
1496 return -ENODEV;
1497 }
1498
1499 static void cdc_unbind (struct usbnet *dev, struct usb_interface *intf)
1500 {
1501 struct cdc_state *info = (void *) &dev->data;
1502
1503 /* disconnect master --> disconnect slave */
1504 if (intf == info->control && info->data) {
1505 /* ensure immediate exit from usbnet_disconnect */
1506 usb_set_intfdata(info->data, NULL);
1507 usb_driver_release_interface (&usbnet_driver, info->data);
1508 info->data = NULL;
1509 }
1510
1511 /* and vice versa (just in case) */
1512 else if (intf == info->data && info->control) {
1513 /* ensure immediate exit from usbnet_disconnect */
1514 usb_set_intfdata(info->control, NULL);
1515 usb_driver_release_interface (&usbnet_driver, info->control);
1516 info->control = NULL;
1517 }
1518 }
1519
1520 #endif /* NEED_GENERIC_CDC */
1521
1522 \f
1523 #ifdef CONFIG_USB_CDCETHER
1524 #define HAVE_HARDWARE
1525
1526 /*-------------------------------------------------------------------------
1527 *
1528 * Communications Device Class, Ethernet Control model
1529 *
1530 * Takes two interfaces. The DATA interface is inactive till an altsetting
1531 * is selected. Configuration data includes class descriptors.
1532 *
1533 * This should interop with whatever the 2.4 "CDCEther.c" driver
1534 * (by Brad Hards) talked with.
1535 *
1536 *-------------------------------------------------------------------------*/
1537
1538 #include <linux/ctype.h>
1539
1540
1541 static void dumpspeed (struct usbnet *dev, __le32 *speeds)
1542 {
1543 if (netif_msg_timer (dev))
1544 devinfo (dev, "link speeds: %u kbps up, %u kbps down",
1545 __le32_to_cpu(speeds[0]) / 1000,
1546 __le32_to_cpu(speeds[1]) / 1000);
1547 }
1548
1549 static void cdc_status (struct usbnet *dev, struct urb *urb)
1550 {
1551 struct usb_cdc_notification *event;
1552
1553 if (urb->actual_length < sizeof *event)
1554 return;
1555
1556 /* SPEED_CHANGE can get split into two 8-byte packets */
1557 if (test_and_clear_bit (EVENT_STS_SPLIT, &dev->flags)) {
1558 dumpspeed (dev, (__le32 *) urb->transfer_buffer);
1559 return;
1560 }
1561
1562 event = urb->transfer_buffer;
1563 switch (event->bNotificationType) {
1564 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1565 if (netif_msg_timer (dev))
1566 devdbg (dev, "CDC: carrier %s",
1567 event->wValue ? "on" : "off");
1568 if (event->wValue)
1569 netif_carrier_on(dev->net);
1570 else
1571 netif_carrier_off(dev->net);
1572 break;
1573 case USB_CDC_NOTIFY_SPEED_CHANGE: /* tx/rx rates */
1574 if (netif_msg_timer (dev))
1575 devdbg (dev, "CDC: speed change (len %d)",
1576 urb->actual_length);
1577 if (urb->actual_length != (sizeof *event + 8))
1578 set_bit (EVENT_STS_SPLIT, &dev->flags);
1579 else
1580 dumpspeed (dev, (__le32 *) &event[1]);
1581 break;
1582 // case USB_CDC_NOTIFY_RESPONSE_AVAILABLE: /* RNDIS; or unsolicited */
1583 default:
1584 deverr (dev, "CDC: unexpected notification %02x!",
1585 event->bNotificationType);
1586 break;
1587 }
1588 }
1589
1590 static u8 nibble (unsigned char c)
1591 {
1592 if (likely (isdigit (c)))
1593 return c - '0';
1594 c = toupper (c);
1595 if (likely (isxdigit (c)))
1596 return 10 + c - 'A';
1597 return 0;
1598 }
1599
1600 static inline int
1601 get_ethernet_addr (struct usbnet *dev, struct usb_cdc_ether_desc *e)
1602 {
1603 int tmp, i;
1604 unsigned char buf [13];
1605
1606 tmp = usb_string (dev->udev, e->iMACAddress, buf, sizeof buf);
1607 if (tmp != 12) {
1608 dev_dbg (&dev->udev->dev,
1609 "bad MAC string %d fetch, %d\n", e->iMACAddress, tmp);
1610 if (tmp >= 0)
1611 tmp = -EINVAL;
1612 return tmp;
1613 }
1614 for (i = tmp = 0; i < 6; i++, tmp += 2)
1615 dev->net->dev_addr [i] =
1616 (nibble (buf [tmp]) << 4) + nibble (buf [tmp + 1]);
1617 return 0;
1618 }
1619
1620 static int cdc_bind (struct usbnet *dev, struct usb_interface *intf)
1621 {
1622 int status;
1623 struct cdc_state *info = (void *) &dev->data;
1624
1625 status = generic_cdc_bind (dev, intf);
1626 if (status < 0)
1627 return status;
1628
1629 status = get_ethernet_addr (dev, info->ether);
1630 if (status < 0) {
1631 usb_set_intfdata(info->data, NULL);
1632 usb_driver_release_interface (&usbnet_driver, info->data);
1633 return status;
1634 }
1635
1636 /* FIXME cdc-ether has some multicast code too, though it complains
1637 * in routine cases. info->ether describes the multicast support.
1638 */
1639 return 0;
1640 }
1641
1642 static const struct driver_info cdc_info = {
1643 .description = "CDC Ethernet Device",
1644 .flags = FLAG_ETHER,
1645 // .check_connect = cdc_check_connect,
1646 .bind = cdc_bind,
1647 .unbind = cdc_unbind,
1648 .status = cdc_status,
1649 };
1650
1651 #endif /* CONFIG_USB_CDCETHER */
1652
1653
1654 \f
1655 #ifdef CONFIG_USB_EPSON2888
1656 #define HAVE_HARDWARE
1657
1658 /*-------------------------------------------------------------------------
1659 *
1660 * EPSON USB clients
1661 *
1662 * This is the same idea as Linux PDAs (below) except the firmware in the
1663 * device might not be Tux-powered. Epson provides reference firmware that
1664 * implements this interface. Product developers can reuse or modify that
1665 * code, such as by using their own product and vendor codes.
1666 *
1667 * Support was from Juro Bystricky <bystricky.juro@erd.epson.com>
1668 *
1669 *-------------------------------------------------------------------------*/
1670
1671 static const struct driver_info epson2888_info = {
1672 .description = "Epson USB Device",
1673 .check_connect = always_connected,
1674
1675 .in = 4, .out = 3,
1676 };
1677
1678 #endif /* CONFIG_USB_EPSON2888 */
1679
1680 \f
1681 #ifdef CONFIG_USB_GENESYS
1682 #define HAVE_HARDWARE
1683
1684 /*-------------------------------------------------------------------------
1685 *
1686 * GeneSys GL620USB-A (www.genesyslogic.com.tw)
1687 *
1688 * ... should partially interop with the Win32 driver for this hardware
1689 * The GeneSys docs imply there's some NDIS issue motivating this framing.
1690 *
1691 * Some info from GeneSys:
1692 * - GL620USB-A is full duplex; GL620USB is only half duplex for bulk.
1693 * (Some cables, like the BAFO-100c, use the half duplex version.)
1694 * - For the full duplex model, the low bit of the version code says
1695 * which side is which ("left/right").
1696 * - For the half duplex type, a control/interrupt handshake settles
1697 * the transfer direction. (That's disabled here, partially coded.)
1698 * A control URB would block until other side writes an interrupt.
1699 *
1700 * Original code from Jiun-Jie Huang <huangjj@genesyslogic.com.tw>
1701 * and merged into "usbnet" by Stanislav Brabec <utx@penguin.cz>.
1702 *
1703 *-------------------------------------------------------------------------*/
1704
1705 // control msg write command
1706 #define GENELINK_CONNECT_WRITE 0xF0
1707 // interrupt pipe index
1708 #define GENELINK_INTERRUPT_PIPE 0x03
1709 // interrupt read buffer size
1710 #define INTERRUPT_BUFSIZE 0x08
1711 // interrupt pipe interval value
1712 #define GENELINK_INTERRUPT_INTERVAL 0x10
1713 // max transmit packet number per transmit
1714 #define GL_MAX_TRANSMIT_PACKETS 32
1715 // max packet length
1716 #define GL_MAX_PACKET_LEN 1514
1717 // max receive buffer size
1718 #define GL_RCV_BUF_SIZE \
1719 (((GL_MAX_PACKET_LEN + 4) * GL_MAX_TRANSMIT_PACKETS) + 4)
1720
1721 struct gl_packet {
1722 u32 packet_length;
1723 char packet_data [1];
1724 };
1725
1726 struct gl_header {
1727 u32 packet_count;
1728 struct gl_packet packets;
1729 };
1730
1731 #ifdef GENELINK_ACK
1732
1733 // FIXME: this code is incomplete, not debugged; it doesn't
1734 // handle interrupts correctly. interrupts should be generic
1735 // code like all other device I/O, anyway.
1736
1737 struct gl_priv {
1738 struct urb *irq_urb;
1739 char irq_buf [INTERRUPT_BUFSIZE];
1740 };
1741
1742 static inline int gl_control_write (struct usbnet *dev, u8 request, u16 value)
1743 {
1744 int retval;
1745
1746 retval = usb_control_msg (dev->udev,
1747 usb_sndctrlpipe (dev->udev, 0),
1748 request,
1749 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1750 value,
1751 0, // index
1752 0, // data buffer
1753 0, // size
1754 CONTROL_TIMEOUT_MS);
1755 return retval;
1756 }
1757
1758 static void gl_interrupt_complete (struct urb *urb, struct pt_regs *regs)
1759 {
1760 int status = urb->status;
1761
1762 switch (status) {
1763 case 0:
1764 /* success */
1765 break;
1766 case -ECONNRESET:
1767 case -ENOENT:
1768 case -ESHUTDOWN:
1769 /* this urb is terminated, clean up */
1770 dbg("%s - urb shutting down with status: %d",
1771 __FUNCTION__, status);
1772 return;
1773 default:
1774 dbg("%s - nonzero urb status received: %d",
1775 __FUNCTION__, urb->status);
1776 }
1777
1778 status = usb_submit_urb (urb, GFP_ATOMIC);
1779 if (status)
1780 err ("%s - usb_submit_urb failed with result %d",
1781 __FUNCTION__, status);
1782 }
1783
1784 static int gl_interrupt_read (struct usbnet *dev)
1785 {
1786 struct gl_priv *priv = dev->priv_data;
1787 int retval;
1788
1789 // issue usb interrupt read
1790 if (priv && priv->irq_urb) {
1791 // submit urb
1792 if ((retval = usb_submit_urb (priv->irq_urb, GFP_KERNEL)) != 0)
1793 dbg ("gl_interrupt_read: submit fail - %X...", retval);
1794 else
1795 dbg ("gl_interrupt_read: submit success...");
1796 }
1797
1798 return 0;
1799 }
1800
1801 // check whether another side is connected
1802 static int genelink_check_connect (struct usbnet *dev)
1803 {
1804 int retval;
1805
1806 dbg ("genelink_check_connect...");
1807
1808 // detect whether another side is connected
1809 if ((retval = gl_control_write (dev, GENELINK_CONNECT_WRITE, 0)) != 0) {
1810 dbg ("%s: genelink_check_connect write fail - %X",
1811 dev->net->name, retval);
1812 return retval;
1813 }
1814
1815 // usb interrupt read to ack another side
1816 if ((retval = gl_interrupt_read (dev)) != 0) {
1817 dbg ("%s: genelink_check_connect read fail - %X",
1818 dev->net->name, retval);
1819 return retval;
1820 }
1821
1822 dbg ("%s: genelink_check_connect read success", dev->net->name);
1823 return 0;
1824 }
1825
1826 // allocate and initialize the private data for genelink
1827 static int genelink_init (struct usbnet *dev)
1828 {
1829 struct gl_priv *priv;
1830
1831 // allocate the private data structure
1832 if ((priv = kmalloc (sizeof *priv, GFP_KERNEL)) == 0) {
1833 dbg ("%s: cannot allocate private data per device",
1834 dev->net->name);
1835 return -ENOMEM;
1836 }
1837
1838 // allocate irq urb
1839 if ((priv->irq_urb = usb_alloc_urb (0, GFP_KERNEL)) == 0) {
1840 dbg ("%s: cannot allocate private irq urb per device",
1841 dev->net->name);
1842 kfree (priv);
1843 return -ENOMEM;
1844 }
1845
1846 // fill irq urb
1847 usb_fill_int_urb (priv->irq_urb, dev->udev,
1848 usb_rcvintpipe (dev->udev, GENELINK_INTERRUPT_PIPE),
1849 priv->irq_buf, INTERRUPT_BUFSIZE,
1850 gl_interrupt_complete, 0,
1851 GENELINK_INTERRUPT_INTERVAL);
1852
1853 // set private data pointer
1854 dev->priv_data = priv;
1855
1856 return 0;
1857 }
1858
1859 // release the private data
1860 static int genelink_free (struct usbnet *dev)
1861 {
1862 struct gl_priv *priv = dev->priv_data;
1863
1864 if (!priv)
1865 return 0;
1866
1867 // FIXME: can't cancel here; it's synchronous, and
1868 // should have happened earlier in any case (interrupt
1869 // handling needs to be generic)
1870
1871 // cancel irq urb first
1872 usb_kill_urb (priv->irq_urb);
1873
1874 // free irq urb
1875 usb_free_urb (priv->irq_urb);
1876
1877 // free the private data structure
1878 kfree (priv);
1879
1880 return 0;
1881 }
1882
1883 #endif
1884
1885 static int genelink_rx_fixup (struct usbnet *dev, struct sk_buff *skb)
1886 {
1887 struct gl_header *header;
1888 struct gl_packet *packet;
1889 struct sk_buff *gl_skb;
1890 u32 size;
1891
1892 header = (struct gl_header *) skb->data;
1893
1894 // get the packet count of the received skb
1895 le32_to_cpus (&header->packet_count);
1896 if ((header->packet_count > GL_MAX_TRANSMIT_PACKETS)
1897 || (header->packet_count < 0)) {
1898 dbg ("genelink: invalid received packet count %d",
1899 header->packet_count);
1900 return 0;
1901 }
1902
1903 // set the current packet pointer to the first packet
1904 packet = &header->packets;
1905
1906 // decrement the length for the packet count size 4 bytes
1907 skb_pull (skb, 4);
1908
1909 while (header->packet_count > 1) {
1910 // get the packet length
1911 size = packet->packet_length;
1912
1913 // this may be a broken packet
1914 if (size > GL_MAX_PACKET_LEN) {
1915 dbg ("genelink: invalid rx length %d", size);
1916 return 0;
1917 }
1918
1919 // allocate the skb for the individual packet
1920 gl_skb = alloc_skb (size, GFP_ATOMIC);
1921 if (gl_skb) {
1922
1923 // copy the packet data to the new skb
1924 memcpy(skb_put(gl_skb, size), packet->packet_data, size);
1925 skb_return (dev, skb);
1926 }
1927
1928 // advance to the next packet
1929 packet = (struct gl_packet *)
1930 &packet->packet_data [size];
1931 header->packet_count--;
1932
1933 // shift the data pointer to the next gl_packet
1934 skb_pull (skb, size + 4);
1935 }
1936
1937 // skip the packet length field 4 bytes
1938 skb_pull (skb, 4);
1939
1940 if (skb->len > GL_MAX_PACKET_LEN) {
1941 dbg ("genelink: invalid rx length %d", skb->len);
1942 return 0;
1943 }
1944 return 1;
1945 }
1946
1947 static struct sk_buff *
1948 genelink_tx_fixup (struct usbnet *dev, struct sk_buff *skb, int flags)
1949 {
1950 int padlen;
1951 int length = skb->len;
1952 int headroom = skb_headroom (skb);
1953 int tailroom = skb_tailroom (skb);
1954 u32 *packet_count;
1955 u32 *packet_len;
1956
1957 // FIXME: magic numbers, bleech
1958 padlen = ((skb->len + (4 + 4*1)) % 64) ? 0 : 1;
1959
1960 if ((!skb_cloned (skb))
1961 && ((headroom + tailroom) >= (padlen + (4 + 4*1)))) {
1962 if ((headroom < (4 + 4*1)) || (tailroom < padlen)) {
1963 skb->data = memmove (skb->head + (4 + 4*1),
1964 skb->data, skb->len);
1965 skb->tail = skb->data + skb->len;
1966 }
1967 } else {
1968 struct sk_buff *skb2;
1969 skb2 = skb_copy_expand (skb, (4 + 4*1) , padlen, flags);
1970 dev_kfree_skb_any (skb);
1971 skb = skb2;
1972 if (!skb)
1973 return NULL;
1974 }
1975
1976 // attach the packet count to the header
1977 packet_count = (u32 *) skb_push (skb, (4 + 4*1));
1978 packet_len = packet_count + 1;
1979
1980 // FIXME little endian?
1981 *packet_count = 1;
1982 *packet_len = length;
1983
1984 // add padding byte
1985 if ((skb->len % dev->maxpacket) == 0)
1986 skb_put (skb, 1);
1987
1988 return skb;
1989 }
1990
1991 static const struct driver_info genelink_info = {
1992 .description = "Genesys GeneLink",
1993 .flags = FLAG_FRAMING_GL | FLAG_NO_SETINT,
1994 .rx_fixup = genelink_rx_fixup,
1995 .tx_fixup = genelink_tx_fixup,
1996
1997 .in = 1, .out = 2,
1998
1999 #ifdef GENELINK_ACK
2000 .check_connect =genelink_check_connect,
2001 #endif
2002 };
2003
2004 #endif /* CONFIG_USB_GENESYS */
2005
2006
2007 \f
2008 #ifdef CONFIG_USB_NET1080
2009 #define HAVE_HARDWARE
2010
2011 /*-------------------------------------------------------------------------
2012 *
2013 * Netchip 1080 driver ... http://www.netchip.com
2014 * Used in LapLink cables
2015 *
2016 *-------------------------------------------------------------------------*/
2017
2018 #define dev_packet_id data[0]
2019 #define frame_errors data[1]
2020
2021 /*
2022 * NetChip framing of ethernet packets, supporting additional error
2023 * checks for links that may drop bulk packets from inside messages.
2024 * Odd USB length == always short read for last usb packet.
2025 * - nc_header
2026 * - Ethernet header (14 bytes)
2027 * - payload
2028 * - (optional padding byte, if needed so length becomes odd)
2029 * - nc_trailer
2030 *
2031 * This framing is to be avoided for non-NetChip devices.
2032 */
2033
2034 struct nc_header { // packed:
2035 __le16 hdr_len; // sizeof nc_header (LE, all)
2036 __le16 packet_len; // payload size (including ethhdr)
2037 __le16 packet_id; // detects dropped packets
2038 #define MIN_HEADER 6
2039
2040 // all else is optional, and must start with:
2041 // u16 vendorId; // from usb-if
2042 // u16 productId;
2043 } __attribute__((__packed__));
2044
2045 #define PAD_BYTE ((unsigned char)0xAC)
2046
2047 struct nc_trailer {
2048 __le16 packet_id;
2049 } __attribute__((__packed__));
2050
2051 // packets may use FLAG_FRAMING_NC and optional pad
2052 #define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \
2053 + sizeof (struct ethhdr) \
2054 + (mtu) \
2055 + 1 \
2056 + sizeof (struct nc_trailer))
2057
2058 #define MIN_FRAMED FRAMED_SIZE(0)
2059
2060
2061 /*
2062 * Zero means no timeout; else, how long a 64 byte bulk packet may be queued
2063 * before the hardware drops it. If that's done, the driver will need to
2064 * frame network packets to guard against the dropped USB packets. The win32
2065 * driver sets this for both sides of the link.
2066 */
2067 #define NC_READ_TTL_MS ((u8)255) // ms
2068
2069 /*
2070 * We ignore most registers and EEPROM contents.
2071 */
2072 #define REG_USBCTL ((u8)0x04)
2073 #define REG_TTL ((u8)0x10)
2074 #define REG_STATUS ((u8)0x11)
2075
2076 /*
2077 * Vendor specific requests to read/write data
2078 */
2079 #define REQUEST_REGISTER ((u8)0x10)
2080 #define REQUEST_EEPROM ((u8)0x11)
2081
2082 static int
2083 nc_vendor_read (struct usbnet *dev, u8 req, u8 regnum, u16 *retval_ptr)
2084 {
2085 int status = usb_control_msg (dev->udev,
2086 usb_rcvctrlpipe (dev->udev, 0),
2087 req,
2088 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2089 0, regnum,
2090 retval_ptr, sizeof *retval_ptr,
2091 CONTROL_TIMEOUT_MS);
2092 if (status > 0)
2093 status = 0;
2094 if (!status)
2095 le16_to_cpus (retval_ptr);
2096 return status;
2097 }
2098
2099 static inline int
2100 nc_register_read (struct usbnet *dev, u8 regnum, u16 *retval_ptr)
2101 {
2102 return nc_vendor_read (dev, REQUEST_REGISTER, regnum, retval_ptr);
2103 }
2104
2105 // no retval ... can become async, usable in_interrupt()
2106 static void
2107 nc_vendor_write (struct usbnet *dev, u8 req, u8 regnum, u16 value)
2108 {
2109 usb_control_msg (dev->udev,
2110 usb_sndctrlpipe (dev->udev, 0),
2111 req,
2112 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2113 value, regnum,
2114 NULL, 0, // data is in setup packet
2115 CONTROL_TIMEOUT_MS);
2116 }
2117
2118 static inline void
2119 nc_register_write (struct usbnet *dev, u8 regnum, u16 value)
2120 {
2121 nc_vendor_write (dev, REQUEST_REGISTER, regnum, value);
2122 }
2123
2124
2125 #if 0
2126 static void nc_dump_registers (struct usbnet *dev)
2127 {
2128 u8 reg;
2129 u16 *vp = kmalloc (sizeof (u16));
2130
2131 if (!vp) {
2132 dbg ("no memory?");
2133 return;
2134 }
2135
2136 dbg ("%s registers:", dev->net->name);
2137 for (reg = 0; reg < 0x20; reg++) {
2138 int retval;
2139
2140 // reading some registers is trouble
2141 if (reg >= 0x08 && reg <= 0xf)
2142 continue;
2143 if (reg >= 0x12 && reg <= 0x1e)
2144 continue;
2145
2146 retval = nc_register_read (dev, reg, vp);
2147 if (retval < 0)
2148 dbg ("%s reg [0x%x] ==> error %d",
2149 dev->net->name, reg, retval);
2150 else
2151 dbg ("%s reg [0x%x] = 0x%x",
2152 dev->net->name, reg, *vp);
2153 }
2154 kfree (vp);
2155 }
2156 #endif
2157
2158
2159 /*-------------------------------------------------------------------------*/
2160
2161 /*
2162 * Control register
2163 */
2164
2165 #define USBCTL_WRITABLE_MASK 0x1f0f
2166 // bits 15-13 reserved, r/o
2167 #define USBCTL_ENABLE_LANG (1 << 12)
2168 #define USBCTL_ENABLE_MFGR (1 << 11)
2169 #define USBCTL_ENABLE_PROD (1 << 10)
2170 #define USBCTL_ENABLE_SERIAL (1 << 9)
2171 #define USBCTL_ENABLE_DEFAULTS (1 << 8)
2172 // bits 7-4 reserved, r/o
2173 #define USBCTL_FLUSH_OTHER (1 << 3)
2174 #define USBCTL_FLUSH_THIS (1 << 2)
2175 #define USBCTL_DISCONN_OTHER (1 << 1)
2176 #define USBCTL_DISCONN_THIS (1 << 0)
2177
2178 static inline void nc_dump_usbctl (struct usbnet *dev, u16 usbctl)
2179 {
2180 if (!netif_msg_link (dev))
2181 return;
2182 devdbg (dev, "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s;"
2183 " this%s%s;"
2184 " other%s%s; r/o 0x%x",
2185 dev->udev->bus->bus_name, dev->udev->devpath,
2186 usbctl,
2187 (usbctl & USBCTL_ENABLE_LANG) ? " lang" : "",
2188 (usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "",
2189 (usbctl & USBCTL_ENABLE_PROD) ? " prod" : "",
2190 (usbctl & USBCTL_ENABLE_SERIAL) ? " serial" : "",
2191 (usbctl & USBCTL_ENABLE_DEFAULTS) ? " defaults" : "",
2192
2193 (usbctl & USBCTL_FLUSH_OTHER) ? " FLUSH" : "",
2194 (usbctl & USBCTL_DISCONN_OTHER) ? " DIS" : "",
2195 (usbctl & USBCTL_FLUSH_THIS) ? " FLUSH" : "",
2196 (usbctl & USBCTL_DISCONN_THIS) ? " DIS" : "",
2197 usbctl & ~USBCTL_WRITABLE_MASK
2198 );
2199 }
2200
2201 /*-------------------------------------------------------------------------*/
2202
2203 /*
2204 * Status register
2205 */
2206
2207 #define STATUS_PORT_A (1 << 15)
2208
2209 #define STATUS_CONN_OTHER (1 << 14)
2210 #define STATUS_SUSPEND_OTHER (1 << 13)
2211 #define STATUS_MAILBOX_OTHER (1 << 12)
2212 #define STATUS_PACKETS_OTHER(n) (((n) >> 8) && 0x03)
2213
2214 #define STATUS_CONN_THIS (1 << 6)
2215 #define STATUS_SUSPEND_THIS (1 << 5)
2216 #define STATUS_MAILBOX_THIS (1 << 4)
2217 #define STATUS_PACKETS_THIS(n) (((n) >> 0) && 0x03)
2218
2219 #define STATUS_UNSPEC_MASK 0x0c8c
2220 #define STATUS_NOISE_MASK ((u16)~(0x0303|STATUS_UNSPEC_MASK))
2221
2222
2223 static inline void nc_dump_status (struct usbnet *dev, u16 status)
2224 {
2225 if (!netif_msg_link (dev))
2226 return;
2227 devdbg (dev, "net1080 %s-%s status 0x%x:"
2228 " this (%c) PKT=%d%s%s%s;"
2229 " other PKT=%d%s%s%s; unspec 0x%x",
2230 dev->udev->bus->bus_name, dev->udev->devpath,
2231 status,
2232
2233 // XXX the packet counts don't seem right
2234 // (1 at reset, not 0); maybe UNSPEC too
2235
2236 (status & STATUS_PORT_A) ? 'A' : 'B',
2237 STATUS_PACKETS_THIS (status),
2238 (status & STATUS_CONN_THIS) ? " CON" : "",
2239 (status & STATUS_SUSPEND_THIS) ? " SUS" : "",
2240 (status & STATUS_MAILBOX_THIS) ? " MBOX" : "",
2241
2242 STATUS_PACKETS_OTHER (status),
2243 (status & STATUS_CONN_OTHER) ? " CON" : "",
2244 (status & STATUS_SUSPEND_OTHER) ? " SUS" : "",
2245 (status & STATUS_MAILBOX_OTHER) ? " MBOX" : "",
2246
2247 status & STATUS_UNSPEC_MASK
2248 );
2249 }
2250
2251 /*-------------------------------------------------------------------------*/
2252
2253 /*
2254 * TTL register
2255 */
2256
2257 #define TTL_THIS(ttl) (0x00ff & ttl)
2258 #define TTL_OTHER(ttl) (0x00ff & (ttl >> 8))
2259 #define MK_TTL(this,other) ((u16)(((other)<<8)|(0x00ff&(this))))
2260
2261 static inline void nc_dump_ttl (struct usbnet *dev, u16 ttl)
2262 {
2263 if (netif_msg_link (dev))
2264 devdbg (dev, "net1080 %s-%s ttl 0x%x this = %d, other = %d",
2265 dev->udev->bus->bus_name, dev->udev->devpath,
2266 ttl, TTL_THIS (ttl), TTL_OTHER (ttl));
2267 }
2268
2269 /*-------------------------------------------------------------------------*/
2270
2271 static int net1080_reset (struct usbnet *dev)
2272 {
2273 u16 usbctl, status, ttl;
2274 u16 *vp = kmalloc (sizeof (u16), GFP_KERNEL);
2275 int retval;
2276
2277 if (!vp)
2278 return -ENOMEM;
2279
2280 // nc_dump_registers (dev);
2281
2282 if ((retval = nc_register_read (dev, REG_STATUS, vp)) < 0) {
2283 dbg ("can't read %s-%s status: %d",
2284 dev->udev->bus->bus_name, dev->udev->devpath, retval);
2285 goto done;
2286 }
2287 status = *vp;
2288 nc_dump_status (dev, status);
2289
2290 if ((retval = nc_register_read (dev, REG_USBCTL, vp)) < 0) {
2291 dbg ("can't read USBCTL, %d", retval);
2292 goto done;
2293 }
2294 usbctl = *vp;
2295 nc_dump_usbctl (dev, usbctl);
2296
2297 nc_register_write (dev, REG_USBCTL,
2298 USBCTL_FLUSH_THIS | USBCTL_FLUSH_OTHER);
2299
2300 if ((retval = nc_register_read (dev, REG_TTL, vp)) < 0) {
2301 dbg ("can't read TTL, %d", retval);
2302 goto done;
2303 }
2304 ttl = *vp;
2305 // nc_dump_ttl (dev, ttl);
2306
2307 nc_register_write (dev, REG_TTL,
2308 MK_TTL (NC_READ_TTL_MS, TTL_OTHER (ttl)) );
2309 dbg ("%s: assigned TTL, %d ms", dev->net->name, NC_READ_TTL_MS);
2310
2311 if (netif_msg_link (dev))
2312 devinfo (dev, "port %c, peer %sconnected",
2313 (status & STATUS_PORT_A) ? 'A' : 'B',
2314 (status & STATUS_CONN_OTHER) ? "" : "dis"
2315 );
2316 retval = 0;
2317
2318 done:
2319 kfree (vp);
2320 return retval;
2321 }
2322
2323 static int net1080_check_connect (struct usbnet *dev)
2324 {
2325 int retval;
2326 u16 status;
2327 u16 *vp = kmalloc (sizeof (u16), GFP_KERNEL);
2328
2329 if (!vp)
2330 return -ENOMEM;
2331 retval = nc_register_read (dev, REG_STATUS, vp);
2332 status = *vp;
2333 kfree (vp);
2334 if (retval != 0) {
2335 dbg ("%s net1080_check_conn read - %d", dev->net->name, retval);
2336 return retval;
2337 }
2338 if ((status & STATUS_CONN_OTHER) != STATUS_CONN_OTHER)
2339 return -ENOLINK;
2340 return 0;
2341 }
2342
2343 static void nc_flush_complete (struct urb *urb, struct pt_regs *regs)
2344 {
2345 kfree (urb->context);
2346 usb_free_urb(urb);
2347 }
2348
2349 static void nc_ensure_sync (struct usbnet *dev)
2350 {
2351 dev->frame_errors++;
2352 if (dev->frame_errors > 5) {
2353 struct urb *urb;
2354 struct usb_ctrlrequest *req;
2355 int status;
2356
2357 /* Send a flush */
2358 urb = usb_alloc_urb (0, SLAB_ATOMIC);
2359 if (!urb)
2360 return;
2361
2362 req = kmalloc (sizeof *req, GFP_ATOMIC);
2363 if (!req) {
2364 usb_free_urb (urb);
2365 return;
2366 }
2367
2368 req->bRequestType = USB_DIR_OUT
2369 | USB_TYPE_VENDOR
2370 | USB_RECIP_DEVICE;
2371 req->bRequest = REQUEST_REGISTER;
2372 req->wValue = cpu_to_le16 (USBCTL_FLUSH_THIS
2373 | USBCTL_FLUSH_OTHER);
2374 req->wIndex = cpu_to_le16 (REG_USBCTL);
2375 req->wLength = cpu_to_le16 (0);
2376
2377 /* queue an async control request, we don't need
2378 * to do anything when it finishes except clean up.
2379 */
2380 usb_fill_control_urb (urb, dev->udev,
2381 usb_sndctrlpipe (dev->udev, 0),
2382 (unsigned char *) req,
2383 NULL, 0,
2384 nc_flush_complete, req);
2385 status = usb_submit_urb (urb, GFP_ATOMIC);
2386 if (status) {
2387 kfree (req);
2388 usb_free_urb (urb);
2389 return;
2390 }
2391
2392 if (netif_msg_rx_err (dev))
2393 devdbg (dev, "flush net1080; too many framing errors");
2394 dev->frame_errors = 0;
2395 }
2396 }
2397
2398 static int net1080_rx_fixup (struct usbnet *dev, struct sk_buff *skb)
2399 {
2400 struct nc_header *header;
2401 struct nc_trailer *trailer;
2402 u16 hdr_len, packet_len;
2403
2404 if (!(skb->len & 0x01)
2405 || MIN_FRAMED > skb->len
2406 || skb->len > FRAMED_SIZE (dev->net->mtu)) {
2407 dev->stats.rx_frame_errors++;
2408 dbg ("rx framesize %d range %d..%d mtu %d", skb->len,
2409 (int)MIN_FRAMED, (int)FRAMED_SIZE (dev->net->mtu),
2410 dev->net->mtu);
2411 nc_ensure_sync (dev);
2412 return 0;
2413 }
2414
2415 header = (struct nc_header *) skb->data;
2416 hdr_len = le16_to_cpup (&header->hdr_len);
2417 packet_len = le16_to_cpup (&header->packet_len);
2418 if (FRAMED_SIZE (packet_len) > MAX_PACKET) {
2419 dev->stats.rx_frame_errors++;
2420 dbg ("packet too big, %d", packet_len);
2421 nc_ensure_sync (dev);
2422 return 0;
2423 } else if (hdr_len < MIN_HEADER) {
2424 dev->stats.rx_frame_errors++;
2425 dbg ("header too short, %d", hdr_len);
2426 nc_ensure_sync (dev);
2427 return 0;
2428 } else if (hdr_len > MIN_HEADER) {
2429 // out of band data for us?
2430 dbg ("header OOB, %d bytes", hdr_len - MIN_HEADER);
2431 nc_ensure_sync (dev);
2432 // switch (vendor/product ids) { ... }
2433 }
2434 skb_pull (skb, hdr_len);
2435
2436 trailer = (struct nc_trailer *)
2437 (skb->data + skb->len - sizeof *trailer);
2438 skb_trim (skb, skb->len - sizeof *trailer);
2439
2440 if ((packet_len & 0x01) == 0) {
2441 if (skb->data [packet_len] != PAD_BYTE) {
2442 dev->stats.rx_frame_errors++;
2443 dbg ("bad pad");
2444 return 0;
2445 }
2446 skb_trim (skb, skb->len - 1);
2447 }
2448 if (skb->len != packet_len) {
2449 dev->stats.rx_frame_errors++;
2450 dbg ("bad packet len %d (expected %d)",
2451 skb->len, packet_len);
2452 nc_ensure_sync (dev);
2453 return 0;
2454 }
2455 if (header->packet_id != get_unaligned (&trailer->packet_id)) {
2456 dev->stats.rx_fifo_errors++;
2457 dbg ("(2+ dropped) rx packet_id mismatch 0x%x 0x%x",
2458 le16_to_cpu (header->packet_id),
2459 le16_to_cpu (trailer->packet_id));
2460 return 0;
2461 }
2462 #if 0
2463 devdbg (dev, "frame <rx h %d p %d id %d", header->hdr_len,
2464 header->packet_len, header->packet_id);
2465 #endif
2466 dev->frame_errors = 0;
2467 return 1;
2468 }
2469
2470 static struct sk_buff *
2471 net1080_tx_fixup (struct usbnet *dev, struct sk_buff *skb, int flags)
2472 {
2473 int padlen;
2474 struct sk_buff *skb2;
2475
2476 padlen = ((skb->len + sizeof (struct nc_header)
2477 + sizeof (struct nc_trailer)) & 0x01) ? 0 : 1;
2478 if (!skb_cloned (skb)) {
2479 int headroom = skb_headroom (skb);
2480 int tailroom = skb_tailroom (skb);
2481
2482 if ((padlen + sizeof (struct nc_trailer)) <= tailroom
2483 && sizeof (struct nc_header) <= headroom)
2484 /* There's enough head and tail room */
2485 return skb;
2486
2487 if ((sizeof (struct nc_header) + padlen
2488 + sizeof (struct nc_trailer)) <
2489 (headroom + tailroom)) {
2490 /* There's enough total room, so just readjust */
2491 skb->data = memmove (skb->head
2492 + sizeof (struct nc_header),
2493 skb->data, skb->len);
2494 skb->tail = skb->data + skb->len;
2495 return skb;
2496 }
2497 }
2498
2499 /* Create a new skb to use with the correct size */
2500 skb2 = skb_copy_expand (skb,
2501 sizeof (struct nc_header),
2502 sizeof (struct nc_trailer) + padlen,
2503 flags);
2504 dev_kfree_skb_any (skb);
2505 return skb2;
2506 }
2507
2508 static const struct driver_info net1080_info = {
2509 .description = "NetChip TurboCONNECT",
2510 .flags = FLAG_FRAMING_NC,
2511 .reset = net1080_reset,
2512 .check_connect =net1080_check_connect,
2513 .rx_fixup = net1080_rx_fixup,
2514 .tx_fixup = net1080_tx_fixup,
2515 };
2516
2517 #endif /* CONFIG_USB_NET1080 */
2518
2519
2520 \f
2521 #ifdef CONFIG_USB_PL2301
2522 #define HAVE_HARDWARE
2523
2524 /*-------------------------------------------------------------------------
2525 *
2526 * Prolific PL-2301/PL-2302 driver ... http://www.prolifictech.com
2527 *
2528 * The protocol and handshaking used here should be bug-compatible
2529 * with the Linux 2.2 "plusb" driver, by Deti Fliegl.
2530 *
2531 *-------------------------------------------------------------------------*/
2532
2533 /*
2534 * Bits 0-4 can be used for software handshaking; they're set from
2535 * one end, cleared from the other, "read" with the interrupt byte.
2536 */
2537 #define PL_S_EN (1<<7) /* (feature only) suspend enable */
2538 /* reserved bit -- rx ready (6) ? */
2539 #define PL_TX_READY (1<<5) /* (interrupt only) transmit ready */
2540 #define PL_RESET_OUT (1<<4) /* reset output pipe */
2541 #define PL_RESET_IN (1<<3) /* reset input pipe */
2542 #define PL_TX_C (1<<2) /* transmission complete */
2543 #define PL_TX_REQ (1<<1) /* transmission received */
2544 #define PL_PEER_E (1<<0) /* peer exists */
2545
2546 static inline int
2547 pl_vendor_req (struct usbnet *dev, u8 req, u8 val, u8 index)
2548 {
2549 return usb_control_msg (dev->udev,
2550 usb_rcvctrlpipe (dev->udev, 0),
2551 req,
2552 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
2553 val, index,
2554 NULL, 0,
2555 CONTROL_TIMEOUT_MS);
2556 }
2557
2558 static inline int
2559 pl_clear_QuickLink_features (struct usbnet *dev, int val)
2560 {
2561 return pl_vendor_req (dev, 1, (u8) val, 0);
2562 }
2563
2564 static inline int
2565 pl_set_QuickLink_features (struct usbnet *dev, int val)
2566 {
2567 return pl_vendor_req (dev, 3, (u8) val, 0);
2568 }
2569
2570 /*-------------------------------------------------------------------------*/
2571
2572 static int pl_reset (struct usbnet *dev)
2573 {
2574 /* some units seem to need this reset, others reject it utterly.
2575 * FIXME be more like "naplink" or windows drivers.
2576 */
2577 (void) pl_set_QuickLink_features (dev,
2578 PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
2579 return 0;
2580 }
2581
2582 static const struct driver_info prolific_info = {
2583 .description = "Prolific PL-2301/PL-2302",
2584 .flags = FLAG_NO_SETINT,
2585 /* some PL-2302 versions seem to fail usb_set_interface() */
2586 .reset = pl_reset,
2587 };
2588
2589 #endif /* CONFIG_USB_PL2301 */
2590
2591 \f
2592 #ifdef CONFIG_USB_KC2190
2593 #define HAVE_HARDWARE
2594 static const struct driver_info kc2190_info = {
2595 .description = "KC Technology KC-190",
2596 };
2597 #endif /* CONFIG_USB_KC2190 */
2598
2599 \f
2600 #ifdef CONFIG_USB_ARMLINUX
2601 #define HAVE_HARDWARE
2602
2603 /*-------------------------------------------------------------------------
2604 *
2605 * Intel's SA-1100 chip integrates basic USB support, and is used
2606 * in PDAs like some iPaqs, the Yopy, some Zaurus models, and more.
2607 * When they run Linux, arch/arm/mach-sa1100/usb-eth.c may be used to
2608 * network using minimal USB framing data.
2609 *
2610 * This describes the driver currently in standard ARM Linux kernels.
2611 * The Zaurus uses a different driver (see later).
2612 *
2613 * PXA25x and PXA210 use XScale cores (ARM v5TE) with better USB support
2614 * and different USB endpoint numbering than the SA1100 devices. The
2615 * mach-pxa/usb-eth.c driver re-uses the device ids from mach-sa1100
2616 * so we rely on the endpoint descriptors.
2617 *
2618 *-------------------------------------------------------------------------*/
2619
2620 static const struct driver_info linuxdev_info = {
2621 .description = "Linux Device",
2622 .check_connect = always_connected,
2623 };
2624
2625 static const struct driver_info yopy_info = {
2626 .description = "Yopy",
2627 .check_connect = always_connected,
2628 };
2629
2630 static const struct driver_info blob_info = {
2631 .description = "Boot Loader OBject",
2632 .check_connect = always_connected,
2633 };
2634
2635 #endif /* CONFIG_USB_ARMLINUX */
2636
2637 \f
2638 #ifdef CONFIG_USB_ZAURUS
2639 #define HAVE_HARDWARE
2640
2641 #include <linux/crc32.h>
2642
2643 /*-------------------------------------------------------------------------
2644 *
2645 * Zaurus is also a SA-1110 based PDA, but one using a different driver
2646 * (and framing) for its USB slave/gadget controller than the case above.
2647 *
2648 * For the current version of that driver, the main way that framing is
2649 * nonstandard (also from perspective of the CDC ethernet model!) is a
2650 * crc32, added to help detect when some sa1100 usb-to-memory DMA errata
2651 * haven't been fully worked around. Also, all Zaurii use the same
2652 * default Ethernet address.
2653 *
2654 * PXA based models use the same framing, and also can't implement
2655 * set_interface properly.
2656 *
2657 * All known Zaurii lie about their standards conformance. Most lie by
2658 * saying they support CDC Ethernet. Some lie and say they support CDC
2659 * MDLM (as if for access to cell phone modems). Someone, please beat
2660 * on Sharp (and other such vendors) for a while with a cluestick.
2661 *
2662 *-------------------------------------------------------------------------*/
2663
2664 static struct sk_buff *
2665 zaurus_tx_fixup (struct usbnet *dev, struct sk_buff *skb, int flags)
2666 {
2667 int padlen;
2668 struct sk_buff *skb2;
2669
2670 padlen = 2;
2671 if (!skb_cloned (skb)) {
2672 int tailroom = skb_tailroom (skb);
2673 if ((padlen + 4) <= tailroom)
2674 goto done;
2675 }
2676 skb2 = skb_copy_expand (skb, 0, 4 + padlen, flags);
2677 dev_kfree_skb_any (skb);
2678 skb = skb2;
2679 if (skb) {
2680 u32 fcs;
2681 done:
2682 fcs = crc32_le (~0, skb->data, skb->len);
2683 fcs = ~fcs;
2684
2685 *skb_put (skb, 1) = fcs & 0xff;
2686 *skb_put (skb, 1) = (fcs>> 8) & 0xff;
2687 *skb_put (skb, 1) = (fcs>>16) & 0xff;
2688 *skb_put (skb, 1) = (fcs>>24) & 0xff;
2689 }
2690 return skb;
2691 }
2692
2693 static const struct driver_info zaurus_sl5x00_info = {
2694 .description = "Sharp Zaurus SL-5x00",
2695 .flags = FLAG_FRAMING_Z,
2696 .check_connect = always_connected,
2697 .bind = generic_cdc_bind,
2698 .unbind = cdc_unbind,
2699 .tx_fixup = zaurus_tx_fixup,
2700 };
2701 #define ZAURUS_STRONGARM_INFO ((unsigned long)&zaurus_sl5x00_info)
2702
2703 static const struct driver_info zaurus_pxa_info = {
2704 .description = "Sharp Zaurus, PXA-2xx based",
2705 .flags = FLAG_FRAMING_Z,
2706 .check_connect = always_connected,
2707 .bind = generic_cdc_bind,
2708 .unbind = cdc_unbind,
2709 .tx_fixup = zaurus_tx_fixup,
2710 };
2711 #define ZAURUS_PXA_INFO ((unsigned long)&zaurus_pxa_info)
2712
2713 static const struct driver_info olympus_mxl_info = {
2714 .description = "Olympus R1000",
2715 .flags = FLAG_FRAMING_Z,
2716 .check_connect = always_connected,
2717 .bind = generic_cdc_bind,
2718 .unbind = cdc_unbind,
2719 .tx_fixup = zaurus_tx_fixup,
2720 };
2721 #define OLYMPUS_MXL_INFO ((unsigned long)&olympus_mxl_info)
2722
2723
2724 /* Some more recent products using Lineo/Belcarra code will wrongly claim
2725 * CDC MDLM conformance. They aren't conformant: data endpoints live
2726 * in the control interface, there's no data interface, and it's not used
2727 * to talk to a cell phone radio. But at least we can detect these two
2728 * pseudo-classes, rather than growing this product list with entries for
2729 * each new nonconformant product (sigh).
2730 */
2731 static const u8 safe_guid[16] = {
2732 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
2733 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
2734 };
2735 static const u8 blan_guid[16] = {
2736 0x74, 0xf0, 0x3d, 0xbd, 0x1e, 0xc1, 0x44, 0x70,
2737 0xa3, 0x67, 0x71, 0x34, 0xc9, 0xf5, 0x54, 0x37,
2738 };
2739
2740 static int blan_mdlm_bind (struct usbnet *dev, struct usb_interface *intf)
2741 {
2742 u8 *buf = intf->cur_altsetting->extra;
2743 int len = intf->cur_altsetting->extralen;
2744 struct usb_cdc_mdlm_desc *desc = NULL;
2745 struct usb_cdc_mdlm_detail_desc *detail = NULL;
2746
2747 while (len > 3) {
2748 if (buf [1] != USB_DT_CS_INTERFACE)
2749 goto next_desc;
2750
2751 /* use bDescriptorSubType, and just verify that we get a
2752 * "BLAN" (or "SAFE") descriptor.
2753 */
2754 switch (buf [2]) {
2755 case USB_CDC_MDLM_TYPE:
2756 if (desc) {
2757 dev_dbg (&intf->dev, "extra MDLM\n");
2758 goto bad_desc;
2759 }
2760 desc = (void *) buf;
2761 if (desc->bLength != sizeof *desc) {
2762 dev_dbg (&intf->dev, "MDLM len %u\n",
2763 desc->bLength);
2764 goto bad_desc;
2765 }
2766 /* expect bcdVersion 1.0, ignore */
2767 if (memcmp(&desc->bGUID, blan_guid, 16)
2768 && memcmp(&desc->bGUID, blan_guid, 16) ) {
2769 /* hey, this one might _really_ be MDLM! */
2770 dev_dbg (&intf->dev, "MDLM guid\n");
2771 goto bad_desc;
2772 }
2773 break;
2774 case USB_CDC_MDLM_DETAIL_TYPE:
2775 if (detail) {
2776 dev_dbg (&intf->dev, "extra MDLM detail\n");
2777 goto bad_desc;
2778 }
2779 detail = (void *) buf;
2780 switch (detail->bGuidDescriptorType) {
2781 case 0: /* "SAFE" */
2782 if (detail->bLength != (sizeof *detail + 2))
2783 goto bad_detail;
2784 break;
2785 case 1: /* "BLAN" */
2786 if (detail->bLength != (sizeof *detail + 3))
2787 goto bad_detail;
2788 break;
2789 default:
2790 goto bad_detail;
2791 }
2792
2793 /* assuming we either noticed BLAN already, or will
2794 * find it soon, there are some data bytes here:
2795 * - bmNetworkCapabilities (unused)
2796 * - bmDataCapabilities (bits, see below)
2797 * - bPad (ignored, for PADAFTER -- BLAN-only)
2798 * bits are:
2799 * - 0x01 -- Zaurus framing (add CRC)
2800 * - 0x02 -- PADBEFORE (CRC includes some padding)
2801 * - 0x04 -- PADAFTER (some padding after CRC)
2802 * - 0x08 -- "fermat" packet mangling (for hw bugs)
2803 * the PADBEFORE appears not to matter; we interop
2804 * with devices that use it and those that don't.
2805 */
2806 if ((detail->bDetailData[1] & ~02) != 0x01) {
2807 /* bmDataCapabilites == 0 would be fine too,
2808 * but framing is minidriver-coupled for now.
2809 */
2810 bad_detail:
2811 dev_dbg (&intf->dev,
2812 "bad MDLM detail, %d %d %d\n",
2813 detail->bLength,
2814 detail->bDetailData[0],
2815 detail->bDetailData[2]);
2816 goto bad_desc;
2817 }
2818 break;
2819 }
2820 next_desc:
2821 len -= buf [0]; /* bLength */
2822 buf += buf [0];
2823 }
2824
2825 if (!desc || !detail) {
2826 dev_dbg (&intf->dev, "missing cdc mdlm %s%sdescriptor\n",
2827 desc ? "" : "func ",
2828 detail ? "" : "detail ");
2829 goto bad_desc;
2830 }
2831
2832 /* There's probably a CDC Ethernet descriptor there, but we can't
2833 * rely on the Ethernet address it provides since not all vendors
2834 * bother to make it unique. Likewise there's no point in tracking
2835 * of the CDC event notifications.
2836 */
2837 return get_endpoints (dev, intf);
2838
2839 bad_desc:
2840 dev_info (&dev->udev->dev, "unsupported MDLM descriptors\n");
2841 return -ENODEV;
2842 }
2843
2844 static const struct driver_info bogus_mdlm_info = {
2845 .description = "pseudo-MDLM (BLAN) device",
2846 .flags = FLAG_FRAMING_Z,
2847 .check_connect = always_connected,
2848 .tx_fixup = zaurus_tx_fixup,
2849 .bind = blan_mdlm_bind,
2850 };
2851
2852 #else
2853
2854 /* blacklist all those devices */
2855 #define ZAURUS_STRONGARM_INFO 0
2856 #define ZAURUS_PXA_INFO 0
2857 #define OLYMPUS_MXL_INFO 0
2858
2859 #endif
2860
2861 \f
2862 /*-------------------------------------------------------------------------
2863 *
2864 * Network Device Driver (peer link to "Host Device", from USB host)
2865 *
2866 *-------------------------------------------------------------------------*/
2867
2868 static int usbnet_change_mtu (struct net_device *net, int new_mtu)
2869 {
2870 struct usbnet *dev = netdev_priv(net);
2871
2872 if (new_mtu <= MIN_PACKET || new_mtu > MAX_PACKET)
2873 return -EINVAL;
2874 #ifdef CONFIG_USB_NET1080
2875 if (((dev->driver_info->flags) & FLAG_FRAMING_NC)) {
2876 if (FRAMED_SIZE (new_mtu) > MAX_PACKET)
2877 return -EINVAL;
2878 }
2879 #endif
2880 #ifdef CONFIG_USB_GENESYS
2881 if (((dev->driver_info->flags) & FLAG_FRAMING_GL)
2882 && new_mtu > GL_MAX_PACKET_LEN)
2883 return -EINVAL;
2884 #endif
2885 // no second zero-length packet read wanted after mtu-sized packets
2886 if (((new_mtu + sizeof (struct ethhdr)) % dev->maxpacket) == 0)
2887 return -EDOM;
2888 net->mtu = new_mtu;
2889 return 0;
2890 }
2891
2892 /*-------------------------------------------------------------------------*/
2893
2894 static struct net_device_stats *usbnet_get_stats (struct net_device *net)
2895 {
2896 struct usbnet *dev = netdev_priv(net);
2897 return &dev->stats;
2898 }
2899
2900 /*-------------------------------------------------------------------------*/
2901
2902 /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from
2903 * completion callbacks. 2.5 should have fixed those bugs...
2904 */
2905
2906 static void defer_bh (struct usbnet *dev, struct sk_buff *skb)
2907 {
2908 struct sk_buff_head *list = skb->list;
2909 unsigned long flags;
2910
2911 spin_lock_irqsave (&list->lock, flags);
2912 __skb_unlink (skb, list);
2913 spin_unlock (&list->lock);
2914 spin_lock (&dev->done.lock);
2915 __skb_queue_tail (&dev->done, skb);
2916 if (dev->done.qlen == 1)
2917 tasklet_schedule (&dev->bh);
2918 spin_unlock_irqrestore (&dev->done.lock, flags);
2919 }
2920
2921 /* some work can't be done in tasklets, so we use keventd
2922 *
2923 * NOTE: annoying asymmetry: if it's active, schedule_work() fails,
2924 * but tasklet_schedule() doesn't. hope the failure is rare.
2925 */
2926 static void defer_kevent (struct usbnet *dev, int work)
2927 {
2928 set_bit (work, &dev->flags);
2929 if (!schedule_work (&dev->kevent))
2930 deverr (dev, "kevent %d may have been dropped", work);
2931 else
2932 devdbg (dev, "kevent %d scheduled", work);
2933 }
2934
2935 /*-------------------------------------------------------------------------*/
2936
2937 static void rx_complete (struct urb *urb, struct pt_regs *regs);
2938
2939 static void rx_submit (struct usbnet *dev, struct urb *urb, int flags)
2940 {
2941 struct sk_buff *skb;
2942 struct skb_data *entry;
2943 int retval = 0;
2944 unsigned long lockflags;
2945 size_t size;
2946
2947 #ifdef CONFIG_USB_NET1080
2948 if (dev->driver_info->flags & FLAG_FRAMING_NC)
2949 size = FRAMED_SIZE (dev->net->mtu);
2950 else
2951 #endif
2952 #ifdef CONFIG_USB_GENESYS
2953 if (dev->driver_info->flags & FLAG_FRAMING_GL)
2954 size = GL_RCV_BUF_SIZE;
2955 else
2956 #endif
2957 #ifdef CONFIG_USB_ZAURUS
2958 if (dev->driver_info->flags & FLAG_FRAMING_Z)
2959 size = 6 + (sizeof (struct ethhdr) + dev->net->mtu);
2960 else
2961 #endif
2962 #ifdef CONFIG_USB_RNDIS
2963 if (dev->driver_info->flags & FLAG_FRAMING_RN)
2964 size = RNDIS_MAX_TRANSFER;
2965 else
2966 #endif
2967 #ifdef CONFIG_USB_AX8817X
2968 if (dev->driver_info->flags & FLAG_FRAMING_AX)
2969 size = 2048;
2970 else
2971 #endif
2972 size = (sizeof (struct ethhdr) + dev->net->mtu);
2973
2974 if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) {
2975 if (netif_msg_rx_err (dev))
2976 devdbg (dev, "no rx skb");
2977 defer_kevent (dev, EVENT_RX_MEMORY);
2978 usb_free_urb (urb);
2979 return;
2980 }
2981 skb_reserve (skb, NET_IP_ALIGN);
2982
2983 entry = (struct skb_data *) skb->cb;
2984 entry->urb = urb;
2985 entry->dev = dev;
2986 entry->state = rx_start;
2987 entry->length = 0;
2988
2989 usb_fill_bulk_urb (urb, dev->udev, dev->in,
2990 skb->data, size, rx_complete, skb);
2991 urb->transfer_flags |= URB_ASYNC_UNLINK;
2992
2993 spin_lock_irqsave (&dev->rxq.lock, lockflags);
2994
2995 if (netif_running (dev->net)
2996 && netif_device_present (dev->net)
2997 && !test_bit (EVENT_RX_HALT, &dev->flags)) {
2998 switch (retval = usb_submit_urb (urb, GFP_ATOMIC)){
2999 case -EPIPE:
3000 defer_kevent (dev, EVENT_RX_HALT);
3001 break;
3002 case -ENOMEM:
3003 defer_kevent (dev, EVENT_RX_MEMORY);
3004 break;
3005 case -ENODEV:
3006 if (netif_msg_ifdown (dev))
3007 devdbg (dev, "device gone");
3008 netif_device_detach (dev->net);
3009 break;
3010 default:
3011 if (netif_msg_rx_err (dev))
3012 devdbg (dev, "rx submit, %d", retval);
3013 tasklet_schedule (&dev->bh);
3014 break;
3015 case 0:
3016 __skb_queue_tail (&dev->rxq, skb);
3017 }
3018 } else {
3019 if (netif_msg_ifdown (dev))
3020 devdbg (dev, "rx: stopped");
3021 retval = -ENOLINK;
3022 }
3023 spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
3024 if (retval) {
3025 dev_kfree_skb_any (skb);
3026 usb_free_urb (urb);
3027 }
3028 }
3029
3030
3031 /*-------------------------------------------------------------------------*/
3032
3033 static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
3034 {
3035 if (dev->driver_info->rx_fixup
3036 && !dev->driver_info->rx_fixup (dev, skb))
3037 goto error;
3038 // else network stack removes extra byte if we forced a short packet
3039
3040 if (skb->len)
3041 skb_return (dev, skb);
3042 else {
3043 if (netif_msg_rx_err (dev))
3044 devdbg (dev, "drop");
3045 error:
3046 dev->stats.rx_errors++;
3047 skb_queue_tail (&dev->done, skb);
3048 }
3049 }
3050
3051 /*-------------------------------------------------------------------------*/
3052
3053 static void rx_complete (struct urb *urb, struct pt_regs *regs)
3054 {
3055 struct sk_buff *skb = (struct sk_buff *) urb->context;
3056 struct skb_data *entry = (struct skb_data *) skb->cb;
3057 struct usbnet *dev = entry->dev;
3058 int urb_status = urb->status;
3059
3060 skb_put (skb, urb->actual_length);
3061 entry->state = rx_done;
3062 entry->urb = NULL;
3063
3064 switch (urb_status) {
3065 // success
3066 case 0:
3067 if (MIN_PACKET > skb->len || skb->len > MAX_PACKET) {
3068 entry->state = rx_cleanup;
3069 dev->stats.rx_errors++;
3070 dev->stats.rx_length_errors++;
3071 if (netif_msg_rx_err (dev))
3072 devdbg (dev, "rx length %d", skb->len);
3073 }
3074 break;
3075
3076 // stalls need manual reset. this is rare ... except that
3077 // when going through USB 2.0 TTs, unplug appears this way.
3078 // we avoid the highspeed version of the ETIMEOUT/EILSEQ
3079 // storm, recovering as needed.
3080 case -EPIPE:
3081 dev->stats.rx_errors++;
3082 defer_kevent (dev, EVENT_RX_HALT);
3083 // FALLTHROUGH
3084
3085 // software-driven interface shutdown
3086 case -ECONNRESET: // async unlink
3087 case -ESHUTDOWN: // hardware gone
3088 if (netif_msg_ifdown (dev))
3089 devdbg (dev, "rx shutdown, code %d", urb_status);
3090 goto block;
3091
3092 // we get controller i/o faults during khubd disconnect() delays.
3093 // throttle down resubmits, to avoid log floods; just temporarily,
3094 // so we still recover when the fault isn't a khubd delay.
3095 case -EPROTO: // ehci
3096 case -ETIMEDOUT: // ohci
3097 case -EILSEQ: // uhci
3098 dev->stats.rx_errors++;
3099 if (!timer_pending (&dev->delay)) {
3100 mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES);
3101 if (netif_msg_link (dev))
3102 devdbg (dev, "rx throttle %d", urb_status);
3103 }
3104 block:
3105 entry->state = rx_cleanup;
3106 entry->urb = urb;
3107 urb = NULL;
3108 break;
3109
3110 // data overrun ... flush fifo?
3111 case -EOVERFLOW:
3112 dev->stats.rx_over_errors++;
3113 // FALLTHROUGH
3114
3115 default:
3116 entry->state = rx_cleanup;
3117 dev->stats.rx_errors++;
3118 if (netif_msg_rx_err (dev))
3119 devdbg (dev, "rx status %d", urb_status);
3120 break;
3121 }
3122
3123 defer_bh (dev, skb);
3124
3125 if (urb) {
3126 if (netif_running (dev->net)
3127 && !test_bit (EVENT_RX_HALT, &dev->flags)) {
3128 rx_submit (dev, urb, GFP_ATOMIC);
3129 return;
3130 }
3131 usb_free_urb (urb);
3132 }
3133 if (netif_msg_rx_err (dev))
3134 devdbg (dev, "no read resubmitted");
3135 }
3136
3137 static void intr_complete (struct urb *urb, struct pt_regs *regs)
3138 {
3139 struct usbnet *dev = urb->context;
3140 int status = urb->status;
3141
3142 switch (status) {
3143 /* success */
3144 case 0:
3145 dev->driver_info->status(dev, urb);
3146 break;
3147
3148 /* software-driven interface shutdown */
3149 case -ENOENT: // urb killed
3150 case -ESHUTDOWN: // hardware gone
3151 if (netif_msg_ifdown (dev))
3152 devdbg (dev, "intr shutdown, code %d", status);
3153 return;
3154
3155 /* NOTE: not throttling like RX/TX, since this endpoint
3156 * already polls infrequently
3157 */
3158 default:
3159 devdbg (dev, "intr status %d", status);
3160 break;
3161 }
3162
3163 if (!netif_running (dev->net))
3164 return;
3165
3166 memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
3167 status = usb_submit_urb (urb, GFP_ATOMIC);
3168 if (status != 0 && netif_msg_timer (dev))
3169 deverr(dev, "intr resubmit --> %d", status);
3170 }
3171
3172 /*-------------------------------------------------------------------------*/
3173
3174 // unlink pending rx/tx; completion handlers do all other cleanup
3175
3176 static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
3177 {
3178 unsigned long flags;
3179 struct sk_buff *skb, *skbnext;
3180 int count = 0;
3181
3182 spin_lock_irqsave (&q->lock, flags);
3183 for (skb = q->next; skb != (struct sk_buff *) q; skb = skbnext) {
3184 struct skb_data *entry;
3185 struct urb *urb;
3186 int retval;
3187
3188 entry = (struct skb_data *) skb->cb;
3189 urb = entry->urb;
3190 skbnext = skb->next;
3191
3192 // during some PM-driven resume scenarios,
3193 // these (async) unlinks complete immediately
3194 retval = usb_unlink_urb (urb);
3195 if (retval != -EINPROGRESS && retval != 0)
3196 devdbg (dev, "unlink urb err, %d", retval);
3197 else
3198 count++;
3199 }
3200 spin_unlock_irqrestore (&q->lock, flags);
3201 return count;
3202 }
3203
3204
3205 /*-------------------------------------------------------------------------*/
3206
3207 // precondition: never called in_interrupt
3208
3209 static int usbnet_stop (struct net_device *net)
3210 {
3211 struct usbnet *dev = netdev_priv(net);
3212 int temp;
3213 DECLARE_WAIT_QUEUE_HEAD (unlink_wakeup);
3214 DECLARE_WAITQUEUE (wait, current);
3215
3216 netif_stop_queue (net);
3217
3218 if (netif_msg_ifdown (dev))
3219 devinfo (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld",
3220 dev->stats.rx_packets, dev->stats.tx_packets,
3221 dev->stats.rx_errors, dev->stats.tx_errors
3222 );
3223
3224 // ensure there are no more active urbs
3225 add_wait_queue (&unlink_wakeup, &wait);
3226 dev->wait = &unlink_wakeup;
3227 temp = unlink_urbs (dev, &dev->txq) + unlink_urbs (dev, &dev->rxq);
3228
3229 // maybe wait for deletions to finish.
3230 while (skb_queue_len (&dev->rxq)
3231 && skb_queue_len (&dev->txq)
3232 && skb_queue_len (&dev->done)) {
3233 msleep(UNLINK_TIMEOUT_MS);
3234 if (netif_msg_ifdown (dev))
3235 devdbg (dev, "waited for %d urb completions", temp);
3236 }
3237 dev->wait = NULL;
3238 remove_wait_queue (&unlink_wakeup, &wait);
3239
3240 usb_kill_urb(dev->interrupt);
3241
3242 /* deferred work (task, timer, softirq) must also stop.
3243 * can't flush_scheduled_work() until we drop rtnl (later),
3244 * else workers could deadlock; so make workers a NOP.
3245 */
3246 dev->flags = 0;
3247 del_timer_sync (&dev->delay);
3248 tasklet_kill (&dev->bh);
3249
3250 return 0;
3251 }
3252
3253 /*-------------------------------------------------------------------------*/
3254
3255 // posts reads, and enables write queuing
3256
3257 // precondition: never called in_interrupt
3258
3259 static int usbnet_open (struct net_device *net)
3260 {
3261 struct usbnet *dev = netdev_priv(net);
3262 int retval = 0;
3263 struct driver_info *info = dev->driver_info;
3264
3265 // put into "known safe" state
3266 if (info->reset && (retval = info->reset (dev)) < 0) {
3267 if (netif_msg_ifup (dev))
3268 devinfo (dev,
3269 "open reset fail (%d) usbnet usb-%s-%s, %s",
3270 retval,
3271 dev->udev->bus->bus_name, dev->udev->devpath,
3272 info->description);
3273 goto done;
3274 }
3275
3276 // insist peer be connected
3277 if (info->check_connect && (retval = info->check_connect (dev)) < 0) {
3278 if (netif_msg_ifup (dev))
3279 devdbg (dev, "can't open; %d", retval);
3280 goto done;
3281 }
3282
3283 /* start any status interrupt transfer */
3284 if (dev->interrupt) {
3285 retval = usb_submit_urb (dev->interrupt, GFP_KERNEL);
3286 if (retval < 0) {
3287 if (netif_msg_ifup (dev))
3288 deverr (dev, "intr submit %d", retval);
3289 goto done;
3290 }
3291 }
3292
3293 netif_start_queue (net);
3294 if (netif_msg_ifup (dev)) {
3295 char *framing;
3296
3297 if (dev->driver_info->flags & FLAG_FRAMING_NC)
3298 framing = "NetChip";
3299 else if (dev->driver_info->flags & FLAG_FRAMING_GL)
3300 framing = "GeneSys";
3301 else if (dev->driver_info->flags & FLAG_FRAMING_Z)
3302 framing = "Zaurus";
3303 else if (dev->driver_info->flags & FLAG_FRAMING_RN)
3304 framing = "RNDIS";
3305 else if (dev->driver_info->flags & FLAG_FRAMING_AX)
3306 framing = "ASIX";
3307 else
3308 framing = "simple";
3309
3310 devinfo (dev, "open: enable queueing "
3311 "(rx %d, tx %d) mtu %d %s framing",
3312 RX_QLEN (dev), TX_QLEN (dev), dev->net->mtu,
3313 framing);
3314 }
3315
3316 // delay posting reads until we're fully open
3317 tasklet_schedule (&dev->bh);
3318 done:
3319 return retval;
3320 }
3321
3322 /*-------------------------------------------------------------------------*/
3323
3324 static void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
3325 {
3326 struct usbnet *dev = netdev_priv(net);
3327
3328 strncpy (info->driver, driver_name, sizeof info->driver);
3329 strncpy (info->version, DRIVER_VERSION, sizeof info->version);
3330 strncpy (info->fw_version, dev->driver_info->description,
3331 sizeof info->fw_version);
3332 usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info);
3333 }
3334
3335 static u32 usbnet_get_link (struct net_device *net)
3336 {
3337 struct usbnet *dev = netdev_priv(net);
3338
3339 /* If a check_connect is defined, return it's results */
3340 if (dev->driver_info->check_connect)
3341 return dev->driver_info->check_connect (dev) == 0;
3342
3343 /* Otherwise, we're up to avoid breaking scripts */
3344 return 1;
3345 }
3346
3347 static u32 usbnet_get_msglevel (struct net_device *net)
3348 {
3349 struct usbnet *dev = netdev_priv(net);
3350
3351 return dev->msg_enable;
3352 }
3353
3354 static void usbnet_set_msglevel (struct net_device *net, u32 level)
3355 {
3356 struct usbnet *dev = netdev_priv(net);
3357
3358 dev->msg_enable = level;
3359 }
3360
3361 static int usbnet_ioctl (struct net_device *net, struct ifreq *rq, int cmd)
3362 {
3363 #ifdef NEED_MII
3364 {
3365 struct usbnet *dev = netdev_priv(net);
3366
3367 if (dev->mii.mdio_read != NULL && dev->mii.mdio_write != NULL)
3368 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
3369 }
3370 #endif
3371 return -EOPNOTSUPP;
3372 }
3373
3374 /*-------------------------------------------------------------------------*/
3375
3376 /* work that cannot be done in interrupt context uses keventd.
3377 *
3378 * NOTE: with 2.5 we could do more of this using completion callbacks,
3379 * especially now that control transfers can be queued.
3380 */
3381 static void
3382 kevent (void *data)
3383 {
3384 struct usbnet *dev = data;
3385 int status;
3386
3387 /* usb_clear_halt() needs a thread context */
3388 if (test_bit (EVENT_TX_HALT, &dev->flags)) {
3389 unlink_urbs (dev, &dev->txq);
3390 status = usb_clear_halt (dev->udev, dev->out);
3391 if (status < 0 && status != -EPIPE) {
3392 if (netif_msg_tx_err (dev))
3393 deverr (dev, "can't clear tx halt, status %d",
3394 status);
3395 } else {
3396 clear_bit (EVENT_TX_HALT, &dev->flags);
3397 netif_wake_queue (dev->net);
3398 }
3399 }
3400 if (test_bit (EVENT_RX_HALT, &dev->flags)) {
3401 unlink_urbs (dev, &dev->rxq);
3402 status = usb_clear_halt (dev->udev, dev->in);
3403 if (status < 0 && status != -EPIPE) {
3404 if (netif_msg_rx_err (dev))
3405 deverr (dev, "can't clear rx halt, status %d",
3406 status);
3407 } else {
3408 clear_bit (EVENT_RX_HALT, &dev->flags);
3409 tasklet_schedule (&dev->bh);
3410 }
3411 }
3412
3413 /* tasklet could resubmit itself forever if memory is tight */
3414 if (test_bit (EVENT_RX_MEMORY, &dev->flags)) {
3415 struct urb *urb = NULL;
3416
3417 if (netif_running (dev->net))
3418 urb = usb_alloc_urb (0, GFP_KERNEL);
3419 else
3420 clear_bit (EVENT_RX_MEMORY, &dev->flags);
3421 if (urb != NULL) {
3422 clear_bit (EVENT_RX_MEMORY, &dev->flags);
3423 rx_submit (dev, urb, GFP_KERNEL);
3424 tasklet_schedule (&dev->bh);
3425 }
3426 }
3427
3428 if (test_bit (EVENT_LINK_RESET, &dev->flags)) {
3429 struct driver_info *info = dev->driver_info;
3430 int retval = 0;
3431
3432 clear_bit (EVENT_LINK_RESET, &dev->flags);
3433 if(info->link_reset && (retval = info->link_reset(dev)) < 0) {
3434 devinfo(dev, "link reset failed (%d) usbnet usb-%s-%s, %s",
3435 retval,
3436 dev->udev->bus->bus_name, dev->udev->devpath,
3437 info->description);
3438 }
3439 }
3440
3441 if (dev->flags)
3442 devdbg (dev, "kevent done, flags = 0x%lx",
3443 dev->flags);
3444 }
3445
3446 /*-------------------------------------------------------------------------*/
3447
3448 static void tx_complete (struct urb *urb, struct pt_regs *regs)
3449 {
3450 struct sk_buff *skb = (struct sk_buff *) urb->context;
3451 struct skb_data *entry = (struct skb_data *) skb->cb;
3452 struct usbnet *dev = entry->dev;
3453
3454 if (urb->status == 0) {
3455 dev->stats.tx_packets++;
3456 dev->stats.tx_bytes += entry->length;
3457 } else {
3458 dev->stats.tx_errors++;
3459
3460 switch (urb->status) {
3461 case -EPIPE:
3462 defer_kevent (dev, EVENT_TX_HALT);
3463 break;
3464
3465 /* software-driven interface shutdown */
3466 case -ECONNRESET: // async unlink
3467 case -ESHUTDOWN: // hardware gone
3468 break;
3469
3470 // like rx, tx gets controller i/o faults during khubd delays
3471 // and so it uses the same throttling mechanism.
3472 case -EPROTO: // ehci
3473 case -ETIMEDOUT: // ohci
3474 case -EILSEQ: // uhci
3475 if (!timer_pending (&dev->delay)) {
3476 mod_timer (&dev->delay,
3477 jiffies + THROTTLE_JIFFIES);
3478 if (netif_msg_link (dev))
3479 devdbg (dev, "tx throttle %d",
3480 urb->status);
3481 }
3482 netif_stop_queue (dev->net);
3483 break;
3484 default:
3485 if (netif_msg_tx_err (dev))
3486 devdbg (dev, "tx err %d", entry->urb->status);
3487 break;
3488 }
3489 }
3490
3491 urb->dev = NULL;
3492 entry->state = tx_done;
3493 defer_bh (dev, skb);
3494 }
3495
3496 /*-------------------------------------------------------------------------*/
3497
3498 static void usbnet_tx_timeout (struct net_device *net)
3499 {
3500 struct usbnet *dev = netdev_priv(net);
3501
3502 unlink_urbs (dev, &dev->txq);
3503 tasklet_schedule (&dev->bh);
3504
3505 // FIXME: device recovery -- reset?
3506 }
3507
3508 /*-------------------------------------------------------------------------*/
3509
3510 static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
3511 {
3512 struct usbnet *dev = netdev_priv(net);
3513 int length;
3514 int retval = NET_XMIT_SUCCESS;
3515 struct urb *urb = NULL;
3516 struct skb_data *entry;
3517 struct driver_info *info = dev->driver_info;
3518 unsigned long flags;
3519 #ifdef CONFIG_USB_NET1080
3520 struct nc_header *header = NULL;
3521 struct nc_trailer *trailer = NULL;
3522 #endif /* CONFIG_USB_NET1080 */
3523
3524 // some devices want funky USB-level framing, for
3525 // win32 driver (usually) and/or hardware quirks
3526 if (info->tx_fixup) {
3527 skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
3528 if (!skb) {
3529 if (netif_msg_tx_err (dev))
3530 devdbg (dev, "can't tx_fixup skb");
3531 goto drop;
3532 }
3533 }
3534 length = skb->len;
3535
3536 if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) {
3537 if (netif_msg_tx_err (dev))
3538 devdbg (dev, "no urb");
3539 goto drop;
3540 }
3541
3542 entry = (struct skb_data *) skb->cb;
3543 entry->urb = urb;
3544 entry->dev = dev;
3545 entry->state = tx_start;
3546 entry->length = length;
3547
3548 // FIXME: reorganize a bit, so that fixup() fills out NetChip
3549 // framing too. (Packet ID update needs the spinlock...)
3550 // [ BETTER: we already own net->xmit_lock, that's enough ]
3551
3552 #ifdef CONFIG_USB_NET1080
3553 if (info->flags & FLAG_FRAMING_NC) {
3554 header = (struct nc_header *) skb_push (skb, sizeof *header);
3555 header->hdr_len = cpu_to_le16 (sizeof (*header));
3556 header->packet_len = cpu_to_le16 (length);
3557 if (!((skb->len + sizeof *trailer) & 0x01))
3558 *skb_put (skb, 1) = PAD_BYTE;
3559 trailer = (struct nc_trailer *) skb_put (skb, sizeof *trailer);
3560 }
3561 #endif /* CONFIG_USB_NET1080 */
3562
3563 usb_fill_bulk_urb (urb, dev->udev, dev->out,
3564 skb->data, skb->len, tx_complete, skb);
3565 urb->transfer_flags |= URB_ASYNC_UNLINK;
3566
3567 /* don't assume the hardware handles USB_ZERO_PACKET
3568 * NOTE: strictly conforming cdc-ether devices should expect
3569 * the ZLP here, but ignore the one-byte packet.
3570 *
3571 * FIXME zero that byte, if it doesn't require a new skb.
3572 */
3573 if ((length % dev->maxpacket) == 0)
3574 urb->transfer_buffer_length++;
3575
3576 spin_lock_irqsave (&dev->txq.lock, flags);
3577
3578 #ifdef CONFIG_USB_NET1080
3579 if (info->flags & FLAG_FRAMING_NC) {
3580 header->packet_id = cpu_to_le16 ((u16)dev->dev_packet_id++);
3581 put_unaligned (header->packet_id, &trailer->packet_id);
3582 #if 0
3583 devdbg (dev, "frame >tx h %d p %d id %d",
3584 header->hdr_len, header->packet_len,
3585 header->packet_id);
3586 #endif
3587 }
3588 #endif /* CONFIG_USB_NET1080 */
3589
3590 switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) {
3591 case -EPIPE:
3592 netif_stop_queue (net);
3593 defer_kevent (dev, EVENT_TX_HALT);
3594 break;
3595 default:
3596 if (netif_msg_tx_err (dev))
3597 devdbg (dev, "tx: submit urb err %d", retval);
3598 break;
3599 case 0:
3600 net->trans_start = jiffies;
3601 __skb_queue_tail (&dev->txq, skb);
3602 if (dev->txq.qlen >= TX_QLEN (dev))
3603 netif_stop_queue (net);
3604 }
3605 spin_unlock_irqrestore (&dev->txq.lock, flags);
3606
3607 if (retval) {
3608 if (netif_msg_tx_err (dev))
3609 devdbg (dev, "drop, code %d", retval);
3610 drop:
3611 retval = NET_XMIT_SUCCESS;
3612 dev->stats.tx_dropped++;
3613 if (skb)
3614 dev_kfree_skb_any (skb);
3615 usb_free_urb (urb);
3616 } else if (netif_msg_tx_queued (dev)) {
3617 devdbg (dev, "> tx, len %d, type 0x%x",
3618 length, skb->protocol);
3619 }
3620 return retval;
3621 }
3622
3623
3624 /*-------------------------------------------------------------------------*/
3625
3626 // tasklet (work deferred from completions, in_irq) or timer
3627
3628 static void usbnet_bh (unsigned long param)
3629 {
3630 struct usbnet *dev = (struct usbnet *) param;
3631 struct sk_buff *skb;
3632 struct skb_data *entry;
3633
3634 while ((skb = skb_dequeue (&dev->done))) {
3635 entry = (struct skb_data *) skb->cb;
3636 switch (entry->state) {
3637 case rx_done:
3638 entry->state = rx_cleanup;
3639 rx_process (dev, skb);
3640 continue;
3641 case tx_done:
3642 case rx_cleanup:
3643 usb_free_urb (entry->urb);
3644 dev_kfree_skb (skb);
3645 continue;
3646 default:
3647 devdbg (dev, "bogus skb state %d", entry->state);
3648 }
3649 }
3650
3651 // waiting for all pending urbs to complete?
3652 if (dev->wait) {
3653 if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) {
3654 wake_up (dev->wait);
3655 }
3656
3657 // or are we maybe short a few urbs?
3658 } else if (netif_running (dev->net)
3659 && netif_device_present (dev->net)
3660 && !timer_pending (&dev->delay)
3661 && !test_bit (EVENT_RX_HALT, &dev->flags)) {
3662 int temp = dev->rxq.qlen;
3663 int qlen = RX_QLEN (dev);
3664
3665 if (temp < qlen) {
3666 struct urb *urb;
3667 int i;
3668
3669 // don't refill the queue all at once
3670 for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) {
3671 urb = usb_alloc_urb (0, GFP_ATOMIC);
3672 if (urb != NULL)
3673 rx_submit (dev, urb, GFP_ATOMIC);
3674 }
3675 if (temp != dev->rxq.qlen && netif_msg_link (dev))
3676 devdbg (dev, "rxqlen %d --> %d",
3677 temp, dev->rxq.qlen);
3678 if (dev->rxq.qlen < qlen)
3679 tasklet_schedule (&dev->bh);
3680 }
3681 if (dev->txq.qlen < TX_QLEN (dev))
3682 netif_wake_queue (dev->net);
3683 }
3684 }
3685
3686
3687 \f
3688 /*-------------------------------------------------------------------------
3689 *
3690 * USB Device Driver support
3691 *
3692 *-------------------------------------------------------------------------*/
3693
3694 // precondition: never called in_interrupt
3695
3696 static void usbnet_disconnect (struct usb_interface *intf)
3697 {
3698 struct usbnet *dev;
3699 struct usb_device *xdev;
3700 struct net_device *net;
3701
3702 dev = usb_get_intfdata(intf);
3703 usb_set_intfdata(intf, NULL);
3704 if (!dev)
3705 return;
3706
3707 xdev = interface_to_usbdev (intf);
3708
3709 if (netif_msg_probe (dev))
3710 devinfo (dev, "unregister usbnet usb-%s-%s, %s",
3711 xdev->bus->bus_name, xdev->devpath,
3712 dev->driver_info->description);
3713
3714 net = dev->net;
3715 unregister_netdev (net);
3716
3717 /* we don't hold rtnl here ... */
3718 flush_scheduled_work ();
3719
3720 if (dev->driver_info->unbind)
3721 dev->driver_info->unbind (dev, intf);
3722
3723 free_netdev(net);
3724 usb_put_dev (xdev);
3725 }
3726
3727
3728 /*-------------------------------------------------------------------------*/
3729
3730 static struct ethtool_ops usbnet_ethtool_ops;
3731
3732 // precondition: never called in_interrupt
3733
3734 static int
3735 usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
3736 {
3737 struct usbnet *dev;
3738 struct net_device *net;
3739 struct usb_host_interface *interface;
3740 struct driver_info *info;
3741 struct usb_device *xdev;
3742 int status;
3743
3744 info = (struct driver_info *) prod->driver_info;
3745 if (!info) {
3746 dev_dbg (&udev->dev, "blacklisted by %s\n", driver_name);
3747 return -ENODEV;
3748 }
3749 xdev = interface_to_usbdev (udev);
3750 interface = udev->cur_altsetting;
3751
3752 usb_get_dev (xdev);
3753
3754 status = -ENOMEM;
3755
3756 // set up our own records
3757 net = alloc_etherdev(sizeof(*dev));
3758 if (!net) {
3759 dbg ("can't kmalloc dev");
3760 goto out;
3761 }
3762
3763 dev = netdev_priv(net);
3764 dev->udev = xdev;
3765 dev->driver_info = info;
3766 dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
3767 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
3768 skb_queue_head_init (&dev->rxq);
3769 skb_queue_head_init (&dev->txq);
3770 skb_queue_head_init (&dev->done);
3771 dev->bh.func = usbnet_bh;
3772 dev->bh.data = (unsigned long) dev;
3773 INIT_WORK (&dev->kevent, kevent, dev);
3774 dev->delay.function = usbnet_bh;
3775 dev->delay.data = (unsigned long) dev;
3776 init_timer (&dev->delay);
3777
3778 SET_MODULE_OWNER (net);
3779 dev->net = net;
3780 strcpy (net->name, "usb%d");
3781 memcpy (net->dev_addr, node_id, sizeof node_id);
3782
3783 #if 0
3784 // dma_supported() is deeply broken on almost all architectures
3785 // possible with some EHCI controllers
3786 if (dma_supported (&udev->dev, DMA_64BIT_MASK))
3787 net->features |= NETIF_F_HIGHDMA;
3788 #endif
3789
3790 net->change_mtu = usbnet_change_mtu;
3791 net->get_stats = usbnet_get_stats;
3792 net->hard_start_xmit = usbnet_start_xmit;
3793 net->open = usbnet_open;
3794 net->stop = usbnet_stop;
3795 net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
3796 net->tx_timeout = usbnet_tx_timeout;
3797 net->do_ioctl = usbnet_ioctl;
3798 net->ethtool_ops = &usbnet_ethtool_ops;
3799
3800 // allow device-specific bind/init procedures
3801 // NOTE net->name still not usable ...
3802 if (info->bind) {
3803 status = info->bind (dev, udev);
3804 // heuristic: "usb%d" for links we know are two-host,
3805 // else "eth%d" when there's reasonable doubt. userspace
3806 // can rename the link if it knows better.
3807 if ((dev->driver_info->flags & FLAG_ETHER) != 0
3808 && (net->dev_addr [0] & 0x02) == 0)
3809 strcpy (net->name, "eth%d");
3810 } else if (!info->in || info->out)
3811 status = get_endpoints (dev, udev);
3812 else {
3813 dev->in = usb_rcvbulkpipe (xdev, info->in);
3814 dev->out = usb_sndbulkpipe (xdev, info->out);
3815 if (!(info->flags & FLAG_NO_SETINT))
3816 status = usb_set_interface (xdev,
3817 interface->desc.bInterfaceNumber,
3818 interface->desc.bAlternateSetting);
3819 else
3820 status = 0;
3821
3822 }
3823
3824 if (status == 0 && dev->status)
3825 status = init_status (dev, udev);
3826 if (status < 0)
3827 goto out1;
3828
3829 dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1);
3830
3831 SET_NETDEV_DEV(net, &udev->dev);
3832 status = register_netdev (net);
3833 if (status)
3834 goto out3;
3835 if (netif_msg_probe (dev))
3836 devinfo (dev, "register usbnet at usb-%s-%s, %s, "
3837 "%02x:%02x:%02x:%02x:%02x:%02x",
3838 xdev->bus->bus_name, xdev->devpath,
3839 dev->driver_info->description,
3840 net->dev_addr [0], net->dev_addr [1],
3841 net->dev_addr [2], net->dev_addr [3],
3842 net->dev_addr [4], net->dev_addr [5]);
3843
3844 // ok, it's ready to go.
3845 usb_set_intfdata (udev, dev);
3846
3847 // start as if the link is up
3848 netif_device_attach (net);
3849
3850 return 0;
3851
3852 out3:
3853 if (info->unbind)
3854 info->unbind (dev, udev);
3855 out1:
3856 free_netdev(net);
3857 out:
3858 usb_put_dev(xdev);
3859 return status;
3860 }
3861
3862 /*-------------------------------------------------------------------------*/
3863
3864 #ifdef CONFIG_PM
3865
3866 static int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
3867 {
3868 struct usbnet *dev = usb_get_intfdata(intf);
3869
3870 /* accelerate emptying of the rx and queues, to avoid
3871 * having everything error out.
3872 */
3873 netif_device_detach (dev->net);
3874 (void) unlink_urbs (dev, &dev->rxq);
3875 (void) unlink_urbs (dev, &dev->txq);
3876 intf->dev.power.power_state = PMSG_SUSPEND;
3877 return 0;
3878 }
3879
3880 static int usbnet_resume (struct usb_interface *intf)
3881 {
3882 struct usbnet *dev = usb_get_intfdata(intf);
3883
3884 intf->dev.power.power_state = PMSG_ON;
3885 netif_device_attach (dev->net);
3886 tasklet_schedule (&dev->bh);
3887 return 0;
3888 }
3889
3890 #else /* !CONFIG_PM */
3891
3892 #define usbnet_suspend NULL
3893 #define usbnet_resume NULL
3894
3895 #endif /* CONFIG_PM */
3896
3897 /*-------------------------------------------------------------------------*/
3898
3899 #ifndef HAVE_HARDWARE
3900 #error You need to configure some hardware for this driver
3901 #endif
3902
3903 /*
3904 * chip vendor names won't normally be on the cables, and
3905 * may not be on the device.
3906 */
3907
3908 static const struct usb_device_id products [] = {
3909
3910 #ifdef CONFIG_USB_ALI_M5632
3911 {
3912 USB_DEVICE (0x0402, 0x5632), // ALi defaults
3913 .driver_info = (unsigned long) &ali_m5632_info,
3914 },
3915 #endif
3916
3917 #ifdef CONFIG_USB_AN2720
3918 {
3919 USB_DEVICE (0x0547, 0x2720), // AnchorChips defaults
3920 .driver_info = (unsigned long) &an2720_info,
3921 }, {
3922 USB_DEVICE (0x0547, 0x2727), // Xircom PGUNET
3923 .driver_info = (unsigned long) &an2720_info,
3924 },
3925 #endif
3926
3927 #ifdef CONFIG_USB_BELKIN
3928 {
3929 USB_DEVICE (0x050d, 0x0004), // Belkin
3930 .driver_info = (unsigned long) &belkin_info,
3931 }, {
3932 USB_DEVICE (0x056c, 0x8100), // eTEK
3933 .driver_info = (unsigned long) &belkin_info,
3934 }, {
3935 USB_DEVICE (0x0525, 0x9901), // Advance USBNET (eTEK)
3936 .driver_info = (unsigned long) &belkin_info,
3937 },
3938 #endif
3939
3940 #ifdef CONFIG_USB_AX8817X
3941 {
3942 // Linksys USB200M
3943 USB_DEVICE (0x077b, 0x2226),
3944 .driver_info = (unsigned long) &ax8817x_info,
3945 }, {
3946 // Netgear FA120
3947 USB_DEVICE (0x0846, 0x1040),
3948 .driver_info = (unsigned long) &netgear_fa120_info,
3949 }, {
3950 // DLink DUB-E100
3951 USB_DEVICE (0x2001, 0x1a00),
3952 .driver_info = (unsigned long) &dlink_dub_e100_info,
3953 }, {
3954 // Intellinet, ST Lab USB Ethernet
3955 USB_DEVICE (0x0b95, 0x1720),
3956 .driver_info = (unsigned long) &ax8817x_info,
3957 }, {
3958 // Hawking UF200, TrendNet TU2-ET100
3959 USB_DEVICE (0x07b8, 0x420a),
3960 .driver_info = (unsigned long) &hawking_uf200_info,
3961 }, {
3962 // Billionton Systems, USB2AR
3963 USB_DEVICE (0x08dd, 0x90ff),
3964 .driver_info = (unsigned long) &ax8817x_info,
3965 }, {
3966 // ATEN UC210T
3967 USB_DEVICE (0x0557, 0x2009),
3968 .driver_info = (unsigned long) &ax8817x_info,
3969 }, {
3970 // Buffalo LUA-U2-KTX
3971 USB_DEVICE (0x0411, 0x003d),
3972 .driver_info = (unsigned long) &ax8817x_info,
3973 }, {
3974 // Sitecom LN-029 "USB 2.0 10/100 Ethernet adapter"
3975 USB_DEVICE (0x6189, 0x182d),
3976 .driver_info = (unsigned long) &ax8817x_info,
3977 }, {
3978 // corega FEther USB2-TX
3979 USB_DEVICE (0x07aa, 0x0017),
3980 .driver_info = (unsigned long) &ax8817x_info,
3981 }, {
3982 // Surecom EP-1427X-2
3983 USB_DEVICE (0x1189, 0x0893),
3984 .driver_info = (unsigned long) &ax8817x_info,
3985 }, {
3986 // goodway corp usb gwusb2e
3987 USB_DEVICE (0x1631, 0x6200),
3988 .driver_info = (unsigned long) &ax8817x_info,
3989 }, {
3990 // ASIX AX88772 10/100
3991 USB_DEVICE (0x0b95, 0x7720),
3992 .driver_info = (unsigned long) &ax88772_info,
3993 },
3994 #endif
3995
3996 #ifdef CONFIG_USB_EPSON2888
3997 {
3998 USB_DEVICE (0x0525, 0x2888), // EPSON USB client
3999 .driver_info = (unsigned long) &epson2888_info,
4000 },
4001 #endif
4002
4003 #ifdef CONFIG_USB_GENESYS
4004 {
4005 USB_DEVICE (0x05e3, 0x0502), // GL620USB-A
4006 .driver_info = (unsigned long) &genelink_info,
4007 },
4008 /* NOT: USB_DEVICE (0x05e3, 0x0501), // GL620USB
4009 * that's half duplex, not currently supported
4010 */
4011 #endif
4012
4013 #ifdef CONFIG_USB_NET1080
4014 {
4015 USB_DEVICE (0x0525, 0x1080), // NetChip ref design
4016 .driver_info = (unsigned long) &net1080_info,
4017 }, {
4018 USB_DEVICE (0x06D0, 0x0622), // Laplink Gold
4019 .driver_info = (unsigned long) &net1080_info,
4020 },
4021 #endif
4022
4023 #ifdef CONFIG_USB_PL2301
4024 {
4025 USB_DEVICE (0x067b, 0x0000), // PL-2301
4026 .driver_info = (unsigned long) &prolific_info,
4027 }, {
4028 USB_DEVICE (0x067b, 0x0001), // PL-2302
4029 .driver_info = (unsigned long) &prolific_info,
4030 },
4031 #endif
4032
4033 #ifdef CONFIG_USB_KC2190
4034 {
4035 USB_DEVICE (0x050f, 0x0190), // KC-190
4036 .driver_info = (unsigned long) &kc2190_info,
4037 },
4038 #endif
4039
4040 #ifdef CONFIG_USB_RNDIS
4041 {
4042 /* RNDIS is MSFT's un-official variant of CDC ACM */
4043 USB_INTERFACE_INFO (USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
4044 .driver_info = (unsigned long) &rndis_info,
4045 },
4046 #endif
4047
4048 #ifdef CONFIG_USB_ARMLINUX
4049 /*
4050 * SA-1100 using standard ARM Linux kernels, or compatible.
4051 * Often used when talking to Linux PDAs (iPaq, Yopy, etc).
4052 * The sa-1100 "usb-eth" driver handles the basic framing.
4053 *
4054 * PXA25x or PXA210 ... these use a "usb-eth" driver much like
4055 * the sa1100 one, but hardware uses different endpoint numbers.
4056 *
4057 * Or the Linux "Ethernet" gadget on hardware that can't talk
4058 * CDC Ethernet (e.g., no altsettings), in either of two modes:
4059 * - acting just like the old "usb-eth" firmware, though
4060 * the implementation is different
4061 * - supporting RNDIS as the first/default configuration for
4062 * MS-Windows interop; Linux needs to use the other config
4063 */
4064 {
4065 // 1183 = 0x049F, both used as hex values?
4066 // Compaq "Itsy" vendor/product id
4067 USB_DEVICE (0x049F, 0x505A), // usb-eth, or compatible
4068 .driver_info = (unsigned long) &linuxdev_info,
4069 }, {
4070 USB_DEVICE (0x0E7E, 0x1001), // G.Mate "Yopy"
4071 .driver_info = (unsigned long) &yopy_info,
4072 }, {
4073 USB_DEVICE (0x8086, 0x07d3), // "blob" bootloader
4074 .driver_info = (unsigned long) &blob_info,
4075 }, {
4076 // Linux Ethernet/RNDIS gadget on pxa210/25x/26x
4077 // e.g. Gumstix, current OpenZaurus, ...
4078 USB_DEVICE_VER (0x0525, 0xa4a2, 0x0203, 0x0203),
4079 .driver_info = (unsigned long) &linuxdev_info,
4080 },
4081 #endif
4082
4083 #if defined(CONFIG_USB_ZAURUS) || defined(CONFIG_USB_CDCETHER)
4084 /*
4085 * SA-1100 based Sharp Zaurus ("collie"), or compatible.
4086 * Same idea as above, but different framing.
4087 *
4088 * PXA-2xx based models are also lying-about-cdc.
4089 * Some models don't even tell the same lies ...
4090 *
4091 * NOTE: OpenZaurus versions with 2.6 kernels won't use these entries,
4092 * unlike the older ones with 2.4 "embedix" kernels.
4093 *
4094 * NOTE: These entries do double-duty, serving as blacklist entries
4095 * whenever Zaurus support isn't enabled, but CDC Ethernet is.
4096 */
4097 #define ZAURUS_MASTER_INTERFACE \
4098 .bInterfaceClass = USB_CLASS_COMM, \
4099 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, \
4100 .bInterfaceProtocol = USB_CDC_PROTO_NONE
4101 {
4102 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4103 | USB_DEVICE_ID_MATCH_DEVICE,
4104 .idVendor = 0x04DD,
4105 .idProduct = 0x8004,
4106 ZAURUS_MASTER_INTERFACE,
4107 .driver_info = ZAURUS_STRONGARM_INFO,
4108 }, {
4109 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4110 | USB_DEVICE_ID_MATCH_DEVICE,
4111 .idVendor = 0x04DD,
4112 .idProduct = 0x8005, /* A-300 */
4113 ZAURUS_MASTER_INTERFACE,
4114 .driver_info = ZAURUS_PXA_INFO,
4115 }, {
4116 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4117 | USB_DEVICE_ID_MATCH_DEVICE,
4118 .idVendor = 0x04DD,
4119 .idProduct = 0x8006, /* B-500/SL-5600 */
4120 ZAURUS_MASTER_INTERFACE,
4121 .driver_info = ZAURUS_PXA_INFO,
4122 }, {
4123 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4124 | USB_DEVICE_ID_MATCH_DEVICE,
4125 .idVendor = 0x04DD,
4126 .idProduct = 0x8007, /* C-700 */
4127 ZAURUS_MASTER_INTERFACE,
4128 .driver_info = ZAURUS_PXA_INFO,
4129 }, {
4130 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4131 | USB_DEVICE_ID_MATCH_DEVICE,
4132 .idVendor = 0x04DD,
4133 .idProduct = 0x9031, /* C-750 C-760 */
4134 ZAURUS_MASTER_INTERFACE,
4135 .driver_info = ZAURUS_PXA_INFO,
4136 }, {
4137 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4138 | USB_DEVICE_ID_MATCH_DEVICE,
4139 .idVendor = 0x04DD,
4140 .idProduct = 0x9032, /* SL-6000 */
4141 ZAURUS_MASTER_INTERFACE,
4142 .driver_info = ZAURUS_PXA_INFO,
4143 }, {
4144 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4145 | USB_DEVICE_ID_MATCH_DEVICE,
4146 .idVendor = 0x04DD,
4147 /* reported with some C860 units */
4148 .idProduct = 0x9050, /* C-860 */
4149 ZAURUS_MASTER_INTERFACE,
4150 .driver_info = ZAURUS_PXA_INFO,
4151 },
4152
4153 #ifdef CONFIG_USB_ZAURUS
4154 /* At least some (reports vary) PXA units have very different lies
4155 * about their standards support: they claim to be cell phones with
4156 * direct access to their radios. (They don't conform to CDC MDLM.)
4157 */
4158 {
4159 USB_INTERFACE_INFO (USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
4160 USB_CDC_PROTO_NONE),
4161 .driver_info = (unsigned long) &bogus_mdlm_info,
4162 },
4163 #endif
4164
4165 /* Olympus has some models with a Zaurus-compatible option.
4166 * R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
4167 */
4168 {
4169 .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
4170 | USB_DEVICE_ID_MATCH_DEVICE,
4171 .idVendor = 0x07B4,
4172 .idProduct = 0x0F02, /* R-1000 */
4173 ZAURUS_MASTER_INTERFACE,
4174 .driver_info = OLYMPUS_MXL_INFO,
4175 },
4176 #endif
4177
4178 #ifdef CONFIG_USB_CDCETHER
4179 {
4180 /* CDC Ether uses two interfaces, not necessarily consecutive.
4181 * We match the main interface, ignoring the optional device
4182 * class so we could handle devices that aren't exclusively
4183 * CDC ether.
4184 *
4185 * NOTE: this match must come AFTER entries working around
4186 * bugs/quirks in a given product (like Zaurus, above).
4187 */
4188 USB_INTERFACE_INFO (USB_CLASS_COMM, USB_CDC_SUBCLASS_ETHERNET,
4189 USB_CDC_PROTO_NONE),
4190 .driver_info = (unsigned long) &cdc_info,
4191 },
4192 #endif
4193
4194 { }, // END
4195 };
4196 MODULE_DEVICE_TABLE (usb, products);
4197
4198 static struct usb_driver usbnet_driver = {
4199 .owner = THIS_MODULE,
4200 .name = driver_name,
4201 .id_table = products,
4202 .probe = usbnet_probe,
4203 .disconnect = usbnet_disconnect,
4204 .suspend = usbnet_suspend,
4205 .resume = usbnet_resume,
4206 };
4207
4208 /* Default ethtool_ops assigned. Devices can override in their bind() routine */
4209 static struct ethtool_ops usbnet_ethtool_ops = {
4210 .get_drvinfo = usbnet_get_drvinfo,
4211 .get_link = usbnet_get_link,
4212 .get_msglevel = usbnet_get_msglevel,
4213 .set_msglevel = usbnet_set_msglevel,
4214 };
4215
4216 /*-------------------------------------------------------------------------*/
4217
4218 static int __init usbnet_init (void)
4219 {
4220 // compiler should optimize these out
4221 BUG_ON (sizeof (((struct sk_buff *)0)->cb)
4222 < sizeof (struct skb_data));
4223 #ifdef CONFIG_USB_CDCETHER
4224 BUG_ON ((sizeof (((struct usbnet *)0)->data)
4225 < sizeof (struct cdc_state)));
4226 #endif
4227
4228 random_ether_addr(node_id);
4229
4230 return usb_register(&usbnet_driver);
4231 }
4232 module_init (usbnet_init);
4233
4234 static void __exit usbnet_exit (void)
4235 {
4236 usb_deregister (&usbnet_driver);
4237 }
4238 module_exit (usbnet_exit);
4239
4240 MODULE_AUTHOR ("David Brownell <dbrownell@users.sourceforge.net>");
4241 MODULE_DESCRIPTION ("USB Host-to-Host Link Drivers (numerous vendors)");
4242 MODULE_LICENSE ("GPL");
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