usb: cdc_ether: Add rmnet device info to ZM5250
[linux-2.6.git] / drivers / net / usb / kaweth.c
1 /****************************************************************
2  *
3  *     kaweth.c - driver for KL5KUSB101 based USB->Ethernet
4  *
5  *     (c) 2000 Interlan Communications
6  *     (c) 2000 Stephane Alnet
7  *     (C) 2001 Brad Hards
8  *     (C) 2002 Oliver Neukum
9  *
10  *     Original author: The Zapman <zapman@interlan.net>
11  *     Inspired by, and much credit goes to Michael Rothwell
12  *     <rothwell@interlan.net> for the test equipment, help, and patience
13  *     Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
14  *     Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
15  *     for providing the firmware and driver resources.
16  *
17  *     This program is free software; you can redistribute it and/or
18  *     modify it under the terms of the GNU General Public License as
19  *     published by the Free Software Foundation; either version 2, or
20  *     (at your option) any later version.
21  *
22  *     This program is distributed in the hope that it will be useful,
23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  *     GNU General Public License for more details.
26  *
27  *     You should have received a copy of the GNU General Public License
28  *     along with this program; if not, write to the Free Software Foundation,
29  *     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30  *
31  ****************************************************************/
32
33 /* TODO:
34  * Develop test procedures for USB net interfaces
35  * Run test procedures
36  * Fix bugs from previous two steps
37  * Snoop other OSs for any tricks we're not doing
38  * Reduce arbitrary timeouts
39  * Smart multicast support
40  * Temporary MAC change support
41  * Tunable SOFs parameter - ioctl()?
42  * Ethernet stats collection
43  * Code formatting improvements
44  */
45
46 #include <linux/module.h>
47 #include <linux/slab.h>
48 #include <linux/string.h>
49 #include <linux/init.h>
50 #include <linux/delay.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/usb.h>
54 #include <linux/types.h>
55 #include <linux/ethtool.h>
56 #include <linux/dma-mapping.h>
57 #include <linux/wait.h>
58 #include <linux/firmware.h>
59 #include <asm/uaccess.h>
60 #include <asm/byteorder.h>
61
62 #undef DEBUG
63
64 #define KAWETH_MTU                      1514
65 #define KAWETH_BUF_SIZE                 1664
66 #define KAWETH_TX_TIMEOUT               (5 * HZ)
67 #define KAWETH_SCRATCH_SIZE             32
68 #define KAWETH_FIRMWARE_BUF_SIZE        4096
69 #define KAWETH_CONTROL_TIMEOUT          (30000)
70
71 #define KAWETH_STATUS_BROKEN            0x0000001
72 #define KAWETH_STATUS_CLOSING           0x0000002
73 #define KAWETH_STATUS_SUSPENDING        0x0000004
74
75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
76
77 #define KAWETH_PACKET_FILTER_PROMISCUOUS        0x01
78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST      0x02
79 #define KAWETH_PACKET_FILTER_DIRECTED           0x04
80 #define KAWETH_PACKET_FILTER_BROADCAST          0x08
81 #define KAWETH_PACKET_FILTER_MULTICAST          0x10
82
83 /* Table 7 */
84 #define KAWETH_COMMAND_GET_ETHERNET_DESC        0x00
85 #define KAWETH_COMMAND_MULTICAST_FILTERS        0x01
86 #define KAWETH_COMMAND_SET_PACKET_FILTER        0x02
87 #define KAWETH_COMMAND_STATISTICS               0x03
88 #define KAWETH_COMMAND_SET_TEMP_MAC             0x06
89 #define KAWETH_COMMAND_GET_TEMP_MAC             0x07
90 #define KAWETH_COMMAND_SET_URB_SIZE             0x08
91 #define KAWETH_COMMAND_SET_SOFS_WAIT            0x09
92 #define KAWETH_COMMAND_SCAN                     0xFF
93
94 #define KAWETH_SOFS_TO_WAIT                     0x05
95
96 #define INTBUFFERSIZE                           4
97
98 #define STATE_OFFSET                            0
99 #define STATE_MASK                              0x40
100 #define STATE_SHIFT                             5
101
102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
103
104
105 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
107 MODULE_LICENSE("GPL");
108 MODULE_FIRMWARE("kaweth/new_code.bin");
109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
112
113 static const char driver_name[] = "kaweth";
114
115 static int kaweth_probe(
116                 struct usb_interface *intf,
117                 const struct usb_device_id *id  /* from id_table */
118         );
119 static void kaweth_disconnect(struct usb_interface *intf);
120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
121                                        unsigned int pipe,
122                                        struct usb_ctrlrequest *cmd, void *data,
123                                        int len, int timeout);
124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
125 static int kaweth_resume(struct usb_interface *intf);
126
127 /****************************************************************
128  *     usb_device_id
129  ****************************************************************/
130 static struct usb_device_id usb_klsi_table[] = {
131         { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
132         { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
133         { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
134         { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
135         { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
136         { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
137         { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
138         { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
139         { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
140         { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
141         { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
142         { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
143         { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
144         { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
145         { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
146         { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
147         { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
148         { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */
149         { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
150         { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
151         { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
152         { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
153         { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
154         { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
155         { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
156         { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
157         { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
158         { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
159         { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
160         { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
161         { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
162         { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
163         { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
164         { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
165         { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
166         {} /* Null terminator */
167 };
168
169 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
170
171 /****************************************************************
172  *     kaweth_driver
173  ****************************************************************/
174 static struct usb_driver kaweth_driver = {
175         .name =         driver_name,
176         .probe =        kaweth_probe,
177         .disconnect =   kaweth_disconnect,
178         .suspend =      kaweth_suspend,
179         .resume =       kaweth_resume,
180         .id_table =     usb_klsi_table,
181         .supports_autosuspend = 1,
182 };
183
184 typedef __u8 eth_addr_t[6];
185
186 /****************************************************************
187  *     usb_eth_dev
188  ****************************************************************/
189 struct usb_eth_dev {
190         char *name;
191         __u16 vendor;
192         __u16 device;
193         void *pdata;
194 };
195
196 /****************************************************************
197  *     kaweth_ethernet_configuration
198  *     Refer Table 8
199  ****************************************************************/
200 struct kaweth_ethernet_configuration
201 {
202         __u8 size;
203         __u8 reserved1;
204         __u8 reserved2;
205         eth_addr_t hw_addr;
206         __u32 statistics_mask;
207         __le16 segment_size;
208         __u16 max_multicast_filters;
209         __u8 reserved3;
210 } __packed;
211
212 /****************************************************************
213  *     kaweth_device
214  ****************************************************************/
215 struct kaweth_device
216 {
217         spinlock_t device_lock;
218
219         __u32 status;
220         int end;
221         int suspend_lowmem_rx;
222         int suspend_lowmem_ctrl;
223         int linkstate;
224         int opened;
225         struct delayed_work lowmem_work;
226
227         struct usb_device *dev;
228         struct usb_interface *intf;
229         struct net_device *net;
230         wait_queue_head_t term_wait;
231
232         struct urb *rx_urb;
233         struct urb *tx_urb;
234         struct urb *irq_urb;
235
236         dma_addr_t intbufferhandle;
237         __u8 *intbuffer;
238         dma_addr_t rxbufferhandle;
239         __u8 *rx_buf;
240
241         
242         struct sk_buff *tx_skb;
243
244         __u8 *firmware_buf;
245         __u8 scratch[KAWETH_SCRATCH_SIZE];
246         __u16 packet_filter_bitmap;
247
248         struct kaweth_ethernet_configuration configuration;
249
250         struct net_device_stats stats;
251 };
252
253 /****************************************************************
254  *     kaweth_control
255  ****************************************************************/
256 static int kaweth_control(struct kaweth_device *kaweth,
257                           unsigned int pipe,
258                           __u8 request,
259                           __u8 requesttype,
260                           __u16 value,
261                           __u16 index,
262                           void *data,
263                           __u16 size,
264                           int timeout)
265 {
266         struct usb_ctrlrequest *dr;
267         int retval;
268
269         dbg("kaweth_control()");
270
271         if(in_interrupt()) {
272                 dbg("in_interrupt()");
273                 return -EBUSY;
274         }
275
276         dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
277
278         if (!dr) {
279                 dbg("kmalloc() failed");
280                 return -ENOMEM;
281         }
282
283         dr->bRequestType = requesttype;
284         dr->bRequest = request;
285         dr->wValue = cpu_to_le16(value);
286         dr->wIndex = cpu_to_le16(index);
287         dr->wLength = cpu_to_le16(size);
288
289         retval = kaweth_internal_control_msg(kaweth->dev,
290                                              pipe,
291                                              dr,
292                                              data,
293                                              size,
294                                              timeout);
295
296         kfree(dr);
297         return retval;
298 }
299
300 /****************************************************************
301  *     kaweth_read_configuration
302  ****************************************************************/
303 static int kaweth_read_configuration(struct kaweth_device *kaweth)
304 {
305         int retval;
306
307         dbg("Reading kaweth configuration");
308
309         retval = kaweth_control(kaweth,
310                                 usb_rcvctrlpipe(kaweth->dev, 0),
311                                 KAWETH_COMMAND_GET_ETHERNET_DESC,
312                                 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
313                                 0,
314                                 0,
315                                 (void *)&kaweth->configuration,
316                                 sizeof(kaweth->configuration),
317                                 KAWETH_CONTROL_TIMEOUT);
318
319         return retval;
320 }
321
322 /****************************************************************
323  *     kaweth_set_urb_size
324  ****************************************************************/
325 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
326 {
327         int retval;
328
329         dbg("Setting URB size to %d", (unsigned)urb_size);
330
331         retval = kaweth_control(kaweth,
332                                 usb_sndctrlpipe(kaweth->dev, 0),
333                                 KAWETH_COMMAND_SET_URB_SIZE,
334                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
335                                 urb_size,
336                                 0,
337                                 (void *)&kaweth->scratch,
338                                 0,
339                                 KAWETH_CONTROL_TIMEOUT);
340
341         return retval;
342 }
343
344 /****************************************************************
345  *     kaweth_set_sofs_wait
346  ****************************************************************/
347 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
348 {
349         int retval;
350
351         dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
352
353         retval = kaweth_control(kaweth,
354                                 usb_sndctrlpipe(kaweth->dev, 0),
355                                 KAWETH_COMMAND_SET_SOFS_WAIT,
356                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
357                                 sofs_wait,
358                                 0,
359                                 (void *)&kaweth->scratch,
360                                 0,
361                                 KAWETH_CONTROL_TIMEOUT);
362
363         return retval;
364 }
365
366 /****************************************************************
367  *     kaweth_set_receive_filter
368  ****************************************************************/
369 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
370                                      __u16 receive_filter)
371 {
372         int retval;
373
374         dbg("Set receive filter to %d", (unsigned)receive_filter);
375
376         retval = kaweth_control(kaweth,
377                                 usb_sndctrlpipe(kaweth->dev, 0),
378                                 KAWETH_COMMAND_SET_PACKET_FILTER,
379                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
380                                 receive_filter,
381                                 0,
382                                 (void *)&kaweth->scratch,
383                                 0,
384                                 KAWETH_CONTROL_TIMEOUT);
385
386         return retval;
387 }
388
389 /****************************************************************
390  *     kaweth_download_firmware
391  ****************************************************************/
392 static int kaweth_download_firmware(struct kaweth_device *kaweth,
393                                     const char *fwname,
394                                     __u8 interrupt,
395                                     __u8 type)
396 {
397         const struct firmware *fw;
398         int data_len;
399         int ret;
400
401         ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
402         if (ret) {
403                 err("Firmware request failed\n");
404                 return ret;
405         }
406
407         if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
408                 err("Firmware too big: %zu", fw->size);
409                 release_firmware(fw);
410                 return -ENOSPC;
411         }
412         data_len = fw->size;
413         memcpy(kaweth->firmware_buf, fw->data, fw->size);
414
415         release_firmware(fw);
416
417         kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
418         kaweth->firmware_buf[3] = data_len >> 8;
419         kaweth->firmware_buf[4] = type;
420         kaweth->firmware_buf[5] = interrupt;
421
422         dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
423                    kaweth->firmware_buf[2]);
424
425         dbg("Downloading firmware at %p to kaweth device at %p",
426             fw->data, kaweth);
427         dbg("Firmware length: %d", data_len);
428
429         return kaweth_control(kaweth,
430                               usb_sndctrlpipe(kaweth->dev, 0),
431                               KAWETH_COMMAND_SCAN,
432                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
433                               0,
434                               0,
435                               (void *)kaweth->firmware_buf,
436                               data_len,
437                               KAWETH_CONTROL_TIMEOUT);
438 }
439
440 /****************************************************************
441  *     kaweth_trigger_firmware
442  ****************************************************************/
443 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
444                                    __u8 interrupt)
445 {
446         kaweth->firmware_buf[0] = 0xB6;
447         kaweth->firmware_buf[1] = 0xC3;
448         kaweth->firmware_buf[2] = 0x01;
449         kaweth->firmware_buf[3] = 0x00;
450         kaweth->firmware_buf[4] = 0x06;
451         kaweth->firmware_buf[5] = interrupt;
452         kaweth->firmware_buf[6] = 0x00;
453         kaweth->firmware_buf[7] = 0x00;
454
455         dbg("Triggering firmware");
456
457         return kaweth_control(kaweth,
458                               usb_sndctrlpipe(kaweth->dev, 0),
459                               KAWETH_COMMAND_SCAN,
460                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
461                               0,
462                               0,
463                               (void *)kaweth->firmware_buf,
464                               8,
465                               KAWETH_CONTROL_TIMEOUT);
466 }
467
468 /****************************************************************
469  *     kaweth_reset
470  ****************************************************************/
471 static int kaweth_reset(struct kaweth_device *kaweth)
472 {
473         int result;
474
475         dbg("kaweth_reset(%p)", kaweth);
476         result = usb_reset_configuration(kaweth->dev);
477         mdelay(10);
478
479         dbg("kaweth_reset() returns %d.",result);
480
481         return result;
482 }
483
484 static void kaweth_usb_receive(struct urb *);
485 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
486
487 /****************************************************************
488         int_callback
489 *****************************************************************/
490
491 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
492 {
493         int status;
494
495         status = usb_submit_urb (kaweth->irq_urb, mf);
496         if (unlikely(status == -ENOMEM)) {
497                 kaweth->suspend_lowmem_ctrl = 1;
498                 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
499         } else {
500                 kaweth->suspend_lowmem_ctrl = 0;
501         }
502
503         if (status)
504                 err ("can't resubmit intr, %s-%s, status %d",
505                                 kaweth->dev->bus->bus_name,
506                                 kaweth->dev->devpath, status);
507 }
508
509 static void int_callback(struct urb *u)
510 {
511         struct kaweth_device *kaweth = u->context;
512         int act_state;
513         int status = u->status;
514
515         switch (status) {
516         case 0:                 /* success */
517                 break;
518         case -ECONNRESET:       /* unlink */
519         case -ENOENT:
520         case -ESHUTDOWN:
521                 return;
522         /* -EPIPE:  should clear the halt */
523         default:                /* error */
524                 goto resubmit;
525         }
526
527         /* we check the link state to report changes */
528         if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
529                 if (act_state)
530                         netif_carrier_on(kaweth->net);
531                 else
532                         netif_carrier_off(kaweth->net);
533
534                 kaweth->linkstate = act_state;
535         }
536 resubmit:
537         kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
538 }
539
540 static void kaweth_resubmit_tl(struct work_struct *work)
541 {
542         struct kaweth_device *kaweth =
543                 container_of(work, struct kaweth_device, lowmem_work.work);
544
545         if (IS_BLOCKED(kaweth->status))
546                 return;
547
548         if (kaweth->suspend_lowmem_rx)
549                 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
550
551         if (kaweth->suspend_lowmem_ctrl)
552                 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
553 }
554
555
556 /****************************************************************
557  *     kaweth_resubmit_rx_urb
558  ****************************************************************/
559 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
560                                                 gfp_t mem_flags)
561 {
562         int result;
563
564         usb_fill_bulk_urb(kaweth->rx_urb,
565                       kaweth->dev,
566                       usb_rcvbulkpipe(kaweth->dev, 1),
567                       kaweth->rx_buf,
568                       KAWETH_BUF_SIZE,
569                       kaweth_usb_receive,
570                       kaweth);
571         kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
572         kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
573
574         if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
575                 if (result == -ENOMEM) {
576                         kaweth->suspend_lowmem_rx = 1;
577                         schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
578                 }
579                 err("resubmitting rx_urb %d failed", result);
580         } else {
581                 kaweth->suspend_lowmem_rx = 0;
582         }
583
584         return result;
585 }
586
587 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
588
589 /****************************************************************
590  *     kaweth_usb_receive
591  ****************************************************************/
592 static void kaweth_usb_receive(struct urb *urb)
593 {
594         struct kaweth_device *kaweth = urb->context;
595         struct net_device *net = kaweth->net;
596         int status = urb->status;
597
598         int count = urb->actual_length;
599         int count2 = urb->transfer_buffer_length;
600
601         __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
602
603         struct sk_buff *skb;
604
605         if (unlikely(status == -EPIPE)) {
606                 kaweth->stats.rx_errors++;
607                 kaweth->end = 1;
608                 wake_up(&kaweth->term_wait);
609                 dbg("Status was -EPIPE.");
610                 return;
611         }
612         if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
613                 /* we are killed - set a flag and wake the disconnect handler */
614                 kaweth->end = 1;
615                 wake_up(&kaweth->term_wait);
616                 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
617                 return;
618         }
619         if (unlikely(status == -EPROTO || status == -ETIME ||
620                      status == -EILSEQ)) {
621                 kaweth->stats.rx_errors++;
622                 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
623                 return;
624         }
625         if (unlikely(status == -EOVERFLOW)) {
626                 kaweth->stats.rx_errors++;
627                 dbg("Status was -EOVERFLOW.");
628         }
629         spin_lock(&kaweth->device_lock);
630         if (IS_BLOCKED(kaweth->status)) {
631                 spin_unlock(&kaweth->device_lock);
632                 return;
633         }
634         spin_unlock(&kaweth->device_lock);
635
636         if(status && status != -EREMOTEIO && count != 1) {
637                 err("%s RX status: %d count: %d packet_len: %d",
638                            net->name,
639                            status,
640                            count,
641                            (int)pkt_len);
642                 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
643                 return;
644         }
645
646         if(kaweth->net && (count > 2)) {
647                 if(pkt_len > (count - 2)) {
648                         err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
649                         err("Packet len & 2047: %x", pkt_len & 2047);
650                         err("Count 2: %x", count2);
651                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
652                         return;
653                 }
654
655                 if(!(skb = dev_alloc_skb(pkt_len+2))) {
656                         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
657                         return;
658                 }
659
660                 skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
661
662                 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
663
664                 skb_put(skb, pkt_len);
665
666                 skb->protocol = eth_type_trans(skb, net);
667
668                 netif_rx(skb);
669
670                 kaweth->stats.rx_packets++;
671                 kaweth->stats.rx_bytes += pkt_len;
672         }
673
674         kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
675 }
676
677 /****************************************************************
678  *     kaweth_open
679  ****************************************************************/
680 static int kaweth_open(struct net_device *net)
681 {
682         struct kaweth_device *kaweth = netdev_priv(net);
683         int res;
684
685         dbg("Opening network device.");
686
687         res = usb_autopm_get_interface(kaweth->intf);
688         if (res) {
689                 err("Interface cannot be resumed.");
690                 return -EIO;
691         }
692         res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
693         if (res)
694                 goto err_out;
695
696         usb_fill_int_urb(
697                 kaweth->irq_urb,
698                 kaweth->dev,
699                 usb_rcvintpipe(kaweth->dev, 3),
700                 kaweth->intbuffer,
701                 INTBUFFERSIZE,
702                 int_callback,
703                 kaweth,
704                 250); /* overriding the descriptor */
705         kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
706         kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
707
708         res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
709         if (res) {
710                 usb_kill_urb(kaweth->rx_urb);
711                 goto err_out;
712         }
713         kaweth->opened = 1;
714
715         netif_start_queue(net);
716
717         kaweth_async_set_rx_mode(kaweth);
718         return 0;
719
720 err_out:
721         usb_autopm_put_interface(kaweth->intf);
722         return -EIO;
723 }
724
725 /****************************************************************
726  *     kaweth_kill_urbs
727  ****************************************************************/
728 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
729 {
730         usb_kill_urb(kaweth->irq_urb);
731         usb_kill_urb(kaweth->rx_urb);
732         usb_kill_urb(kaweth->tx_urb);
733
734         cancel_delayed_work_sync(&kaweth->lowmem_work);
735
736         /* a scheduled work may have resubmitted,
737            we hit them again */
738         usb_kill_urb(kaweth->irq_urb);
739         usb_kill_urb(kaweth->rx_urb);
740 }
741
742 /****************************************************************
743  *     kaweth_close
744  ****************************************************************/
745 static int kaweth_close(struct net_device *net)
746 {
747         struct kaweth_device *kaweth = netdev_priv(net);
748
749         netif_stop_queue(net);
750         kaweth->opened = 0;
751
752         kaweth->status |= KAWETH_STATUS_CLOSING;
753
754         kaweth_kill_urbs(kaweth);
755
756         kaweth->status &= ~KAWETH_STATUS_CLOSING;
757
758         usb_autopm_put_interface(kaweth->intf);
759
760         return 0;
761 }
762
763 static u32 kaweth_get_link(struct net_device *dev)
764 {
765         struct kaweth_device *kaweth = netdev_priv(dev);
766
767         return kaweth->linkstate;
768 }
769
770 static const struct ethtool_ops ops = {
771         .get_link       = kaweth_get_link
772 };
773
774 /****************************************************************
775  *     kaweth_usb_transmit_complete
776  ****************************************************************/
777 static void kaweth_usb_transmit_complete(struct urb *urb)
778 {
779         struct kaweth_device *kaweth = urb->context;
780         struct sk_buff *skb = kaweth->tx_skb;
781         int status = urb->status;
782
783         if (unlikely(status != 0))
784                 if (status != -ENOENT)
785                         dbg("%s: TX status %d.", kaweth->net->name, status);
786
787         netif_wake_queue(kaweth->net);
788         dev_kfree_skb_irq(skb);
789 }
790
791 /****************************************************************
792  *     kaweth_start_xmit
793  ****************************************************************/
794 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
795                                            struct net_device *net)
796 {
797         struct kaweth_device *kaweth = netdev_priv(net);
798         __le16 *private_header;
799
800         int res;
801
802         spin_lock_irq(&kaweth->device_lock);
803
804         kaweth_async_set_rx_mode(kaweth);
805         netif_stop_queue(net);
806         if (IS_BLOCKED(kaweth->status)) {
807                 goto skip;
808         }
809
810         /* We now decide whether we can put our special header into the sk_buff */
811         if (skb_cloned(skb) || skb_headroom(skb) < 2) {
812                 /* no such luck - we make our own */
813                 struct sk_buff *copied_skb;
814                 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
815                 dev_kfree_skb_irq(skb);
816                 skb = copied_skb;
817                 if (!copied_skb) {
818                         kaweth->stats.tx_errors++;
819                         netif_start_queue(net);
820                         spin_unlock_irq(&kaweth->device_lock);
821                         return NETDEV_TX_OK;
822                 }
823         }
824
825         private_header = (__le16 *)__skb_push(skb, 2);
826         *private_header = cpu_to_le16(skb->len-2);
827         kaweth->tx_skb = skb;
828
829         usb_fill_bulk_urb(kaweth->tx_urb,
830                       kaweth->dev,
831                       usb_sndbulkpipe(kaweth->dev, 2),
832                       private_header,
833                       skb->len,
834                       kaweth_usb_transmit_complete,
835                       kaweth);
836         kaweth->end = 0;
837
838         if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
839         {
840                 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
841 skip:
842                 kaweth->stats.tx_errors++;
843
844                 netif_start_queue(net);
845                 dev_kfree_skb_irq(skb);
846         }
847         else
848         {
849                 kaweth->stats.tx_packets++;
850                 kaweth->stats.tx_bytes += skb->len;
851         }
852
853         spin_unlock_irq(&kaweth->device_lock);
854
855         return NETDEV_TX_OK;
856 }
857
858 /****************************************************************
859  *     kaweth_set_rx_mode
860  ****************************************************************/
861 static void kaweth_set_rx_mode(struct net_device *net)
862 {
863         struct kaweth_device *kaweth = netdev_priv(net);
864
865         __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
866                                      KAWETH_PACKET_FILTER_BROADCAST |
867                                      KAWETH_PACKET_FILTER_MULTICAST;
868
869         dbg("Setting Rx mode to %d", packet_filter_bitmap);
870
871         netif_stop_queue(net);
872
873         if (net->flags & IFF_PROMISC) {
874                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
875         }
876         else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
877                 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
878         }
879
880         kaweth->packet_filter_bitmap = packet_filter_bitmap;
881         netif_wake_queue(net);
882 }
883
884 /****************************************************************
885  *     kaweth_async_set_rx_mode
886  ****************************************************************/
887 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
888 {
889         int result;
890         __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
891
892         kaweth->packet_filter_bitmap = 0;
893         if (packet_filter_bitmap == 0)
894                 return;
895
896         if (in_interrupt())
897                 return;
898
899         result = kaweth_control(kaweth,
900                                 usb_sndctrlpipe(kaweth->dev, 0),
901                                 KAWETH_COMMAND_SET_PACKET_FILTER,
902                                 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
903                                 packet_filter_bitmap,
904                                 0,
905                                 (void *)&kaweth->scratch,
906                                 0,
907                                 KAWETH_CONTROL_TIMEOUT);
908
909         if(result < 0) {
910                 err("Failed to set Rx mode: %d", result);
911         }
912         else {
913                 dbg("Set Rx mode to %d", packet_filter_bitmap);
914         }
915 }
916
917 /****************************************************************
918  *     kaweth_netdev_stats
919  ****************************************************************/
920 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
921 {
922         struct kaweth_device *kaweth = netdev_priv(dev);
923         return &kaweth->stats;
924 }
925
926 /****************************************************************
927  *     kaweth_tx_timeout
928  ****************************************************************/
929 static void kaweth_tx_timeout(struct net_device *net)
930 {
931         struct kaweth_device *kaweth = netdev_priv(net);
932
933         dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
934         kaweth->stats.tx_errors++;
935         net->trans_start = jiffies;
936
937         usb_unlink_urb(kaweth->tx_urb);
938 }
939
940 /****************************************************************
941  *     kaweth_suspend
942  ****************************************************************/
943 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
944 {
945         struct kaweth_device *kaweth = usb_get_intfdata(intf);
946         unsigned long flags;
947
948         dbg("Suspending device");
949         spin_lock_irqsave(&kaweth->device_lock, flags);
950         kaweth->status |= KAWETH_STATUS_SUSPENDING;
951         spin_unlock_irqrestore(&kaweth->device_lock, flags);
952
953         kaweth_kill_urbs(kaweth);
954         return 0;
955 }
956
957 /****************************************************************
958  *     kaweth_resume
959  ****************************************************************/
960 static int kaweth_resume(struct usb_interface *intf)
961 {
962         struct kaweth_device *kaweth = usb_get_intfdata(intf);
963         unsigned long flags;
964
965         dbg("Resuming device");
966         spin_lock_irqsave(&kaweth->device_lock, flags);
967         kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
968         spin_unlock_irqrestore(&kaweth->device_lock, flags);
969
970         if (!kaweth->opened)
971                 return 0;
972         kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
973         kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
974
975         return 0;
976 }
977
978 /****************************************************************
979  *     kaweth_probe
980  ****************************************************************/
981
982
983 static const struct net_device_ops kaweth_netdev_ops = {
984         .ndo_open =                     kaweth_open,
985         .ndo_stop =                     kaweth_close,
986         .ndo_start_xmit =               kaweth_start_xmit,
987         .ndo_tx_timeout =               kaweth_tx_timeout,
988         .ndo_set_multicast_list =       kaweth_set_rx_mode,
989         .ndo_get_stats =                kaweth_netdev_stats,
990         .ndo_change_mtu =               eth_change_mtu,
991         .ndo_set_mac_address =          eth_mac_addr,
992         .ndo_validate_addr =            eth_validate_addr,
993 };
994
995 static int kaweth_probe(
996                 struct usb_interface *intf,
997                 const struct usb_device_id *id      /* from id_table */
998         )
999 {
1000         struct usb_device *dev = interface_to_usbdev(intf);
1001         struct kaweth_device *kaweth;
1002         struct net_device *netdev;
1003         const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1004         int result = 0;
1005
1006         dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1007                  dev->devnum,
1008                  le16_to_cpu(dev->descriptor.idVendor),
1009                  le16_to_cpu(dev->descriptor.idProduct),
1010                  le16_to_cpu(dev->descriptor.bcdDevice));
1011
1012         dbg("Device at %p", dev);
1013
1014         dbg("Descriptor length: %x type: %x",
1015                  (int)dev->descriptor.bLength,
1016                  (int)dev->descriptor.bDescriptorType);
1017
1018         netdev = alloc_etherdev(sizeof(*kaweth));
1019         if (!netdev)
1020                 return -ENOMEM;
1021
1022         kaweth = netdev_priv(netdev);
1023         kaweth->dev = dev;
1024         kaweth->net = netdev;
1025
1026         spin_lock_init(&kaweth->device_lock);
1027         init_waitqueue_head(&kaweth->term_wait);
1028
1029         dbg("Resetting.");
1030
1031         kaweth_reset(kaweth);
1032
1033         /*
1034          * If high byte of bcdDevice is nonzero, firmware is already
1035          * downloaded. Don't try to do it again, or we'll hang the device.
1036          */
1037
1038         if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1039                 dev_info(&intf->dev, "Firmware present in device.\n");
1040         } else {
1041                 /* Download the firmware */
1042                 dev_info(&intf->dev, "Downloading firmware...\n");
1043                 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1044                 if ((result = kaweth_download_firmware(kaweth,
1045                                                       "kaweth/new_code.bin",
1046                                                       100,
1047                                                       2)) < 0) {
1048                         err("Error downloading firmware (%d)", result);
1049                         goto err_fw;
1050                 }
1051
1052                 if ((result = kaweth_download_firmware(kaweth,
1053                                                       "kaweth/new_code_fix.bin",
1054                                                       100,
1055                                                       3)) < 0) {
1056                         err("Error downloading firmware fix (%d)", result);
1057                         goto err_fw;
1058                 }
1059
1060                 if ((result = kaweth_download_firmware(kaweth,
1061                                                       "kaweth/trigger_code.bin",
1062                                                       126,
1063                                                       2)) < 0) {
1064                         err("Error downloading trigger code (%d)", result);
1065                         goto err_fw;
1066
1067                 }
1068
1069                 if ((result = kaweth_download_firmware(kaweth,
1070                                                       "kaweth/trigger_code_fix.bin",
1071                                                       126,
1072                                                       3)) < 0) {
1073                         err("Error downloading trigger code fix (%d)", result);
1074                         goto err_fw;
1075                 }
1076
1077
1078                 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1079                         err("Error triggering firmware (%d)", result);
1080                         goto err_fw;
1081                 }
1082
1083                 /* Device will now disappear for a moment...  */
1084                 dev_info(&intf->dev, "Firmware loaded.  I'll be back...\n");
1085 err_fw:
1086                 free_page((unsigned long)kaweth->firmware_buf);
1087                 free_netdev(netdev);
1088                 return -EIO;
1089         }
1090
1091         result = kaweth_read_configuration(kaweth);
1092
1093         if(result < 0) {
1094                 err("Error reading configuration (%d), no net device created", result);
1095                 goto err_free_netdev;
1096         }
1097
1098         dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1099         dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1100         dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1101         dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1102                  (int)kaweth->configuration.hw_addr[0],
1103                  (int)kaweth->configuration.hw_addr[1],
1104                  (int)kaweth->configuration.hw_addr[2],
1105                  (int)kaweth->configuration.hw_addr[3],
1106                  (int)kaweth->configuration.hw_addr[4],
1107                  (int)kaweth->configuration.hw_addr[5]);
1108
1109         if(!memcmp(&kaweth->configuration.hw_addr,
1110                    &bcast_addr,
1111                    sizeof(bcast_addr))) {
1112                 err("Firmware not functioning properly, no net device created");
1113                 goto err_free_netdev;
1114         }
1115
1116         if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1117                 dbg("Error setting URB size");
1118                 goto err_free_netdev;
1119         }
1120
1121         if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1122                 err("Error setting SOFS wait");
1123                 goto err_free_netdev;
1124         }
1125
1126         result = kaweth_set_receive_filter(kaweth,
1127                                            KAWETH_PACKET_FILTER_DIRECTED |
1128                                            KAWETH_PACKET_FILTER_BROADCAST |
1129                                            KAWETH_PACKET_FILTER_MULTICAST);
1130
1131         if(result < 0) {
1132                 err("Error setting receive filter");
1133                 goto err_free_netdev;
1134         }
1135
1136         dbg("Initializing net device.");
1137
1138         kaweth->intf = intf;
1139
1140         kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1141         if (!kaweth->tx_urb)
1142                 goto err_free_netdev;
1143         kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1144         if (!kaweth->rx_urb)
1145                 goto err_only_tx;
1146         kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1147         if (!kaweth->irq_urb)
1148                 goto err_tx_and_rx;
1149
1150         kaweth->intbuffer = usb_alloc_coherent( kaweth->dev,
1151                                                 INTBUFFERSIZE,
1152                                                 GFP_KERNEL,
1153                                                 &kaweth->intbufferhandle);
1154         if (!kaweth->intbuffer)
1155                 goto err_tx_and_rx_and_irq;
1156         kaweth->rx_buf = usb_alloc_coherent(    kaweth->dev,
1157                                                 KAWETH_BUF_SIZE,
1158                                                 GFP_KERNEL,
1159                                                 &kaweth->rxbufferhandle);
1160         if (!kaweth->rx_buf)
1161                 goto err_all_but_rxbuf;
1162
1163         memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1164         memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1165                sizeof(kaweth->configuration.hw_addr));
1166
1167         netdev->netdev_ops = &kaweth_netdev_ops;
1168         netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1169         netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1170         SET_ETHTOOL_OPS(netdev, &ops);
1171
1172         /* kaweth is zeroed as part of alloc_netdev */
1173         INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1174         usb_set_intfdata(intf, kaweth);
1175
1176 #if 0
1177 // dma_supported() is deeply broken on almost all architectures
1178         if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1179                 kaweth->net->features |= NETIF_F_HIGHDMA;
1180 #endif
1181
1182         SET_NETDEV_DEV(netdev, &intf->dev);
1183         if (register_netdev(netdev) != 0) {
1184                 err("Error registering netdev.");
1185                 goto err_intfdata;
1186         }
1187
1188         dev_info(&intf->dev, "kaweth interface created at %s\n",
1189                  kaweth->net->name);
1190
1191         dbg("Kaweth probe returning.");
1192
1193         return 0;
1194
1195 err_intfdata:
1196         usb_set_intfdata(intf, NULL);
1197         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1198 err_all_but_rxbuf:
1199         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1200 err_tx_and_rx_and_irq:
1201         usb_free_urb(kaweth->irq_urb);
1202 err_tx_and_rx:
1203         usb_free_urb(kaweth->rx_urb);
1204 err_only_tx:
1205         usb_free_urb(kaweth->tx_urb);
1206 err_free_netdev:
1207         free_netdev(netdev);
1208
1209         return -EIO;
1210 }
1211
1212 /****************************************************************
1213  *     kaweth_disconnect
1214  ****************************************************************/
1215 static void kaweth_disconnect(struct usb_interface *intf)
1216 {
1217         struct kaweth_device *kaweth = usb_get_intfdata(intf);
1218         struct net_device *netdev;
1219
1220         dev_info(&intf->dev, "Unregistering\n");
1221
1222         usb_set_intfdata(intf, NULL);
1223         if (!kaweth) {
1224                 dev_warn(&intf->dev, "unregistering non-existent device\n");
1225                 return;
1226         }
1227         netdev = kaweth->net;
1228
1229         dbg("Unregistering net device");
1230         unregister_netdev(netdev);
1231
1232         usb_free_urb(kaweth->rx_urb);
1233         usb_free_urb(kaweth->tx_urb);
1234         usb_free_urb(kaweth->irq_urb);
1235
1236         usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1237         usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1238
1239         free_netdev(netdev);
1240 }
1241
1242
1243 // FIXME this completion stuff is a modified clone of
1244 // an OLD version of some stuff in usb.c ...
1245 struct usb_api_data {
1246         wait_queue_head_t wqh;
1247         int done;
1248 };
1249
1250 /*-------------------------------------------------------------------*
1251  * completion handler for compatibility wrappers (sync control/bulk) *
1252  *-------------------------------------------------------------------*/
1253 static void usb_api_blocking_completion(struct urb *urb)
1254 {
1255         struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1256
1257         awd->done=1;
1258         wake_up(&awd->wqh);
1259 }
1260
1261 /*-------------------------------------------------------------------*
1262  *                         COMPATIBILITY STUFF                       *
1263  *-------------------------------------------------------------------*/
1264
1265 // Starts urb and waits for completion or timeout
1266 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1267 {
1268         struct usb_api_data awd;
1269         int status;
1270
1271         init_waitqueue_head(&awd.wqh);
1272         awd.done = 0;
1273
1274         urb->context = &awd;
1275         status = usb_submit_urb(urb, GFP_NOIO);
1276         if (status) {
1277                 // something went wrong
1278                 usb_free_urb(urb);
1279                 return status;
1280         }
1281
1282         if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1283                 // timeout
1284                 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1285                 usb_kill_urb(urb);  // remove urb safely
1286                 status = -ETIMEDOUT;
1287         }
1288         else {
1289                 status = urb->status;
1290         }
1291
1292         if (actual_length) {
1293                 *actual_length = urb->actual_length;
1294         }
1295
1296         usb_free_urb(urb);
1297         return status;
1298 }
1299
1300 /*-------------------------------------------------------------------*/
1301 // returns status (negative) or length (positive)
1302 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1303                                        unsigned int pipe,
1304                                        struct usb_ctrlrequest *cmd, void *data,
1305                                        int len, int timeout)
1306 {
1307         struct urb *urb;
1308         int retv;
1309         int length = 0; /* shut up GCC */
1310
1311         urb = usb_alloc_urb(0, GFP_NOIO);
1312         if (!urb)
1313                 return -ENOMEM;
1314
1315         usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1316                          len, usb_api_blocking_completion, NULL);
1317
1318         retv = usb_start_wait_urb(urb, timeout, &length);
1319         if (retv < 0) {
1320                 return retv;
1321         }
1322         else {
1323                 return length;
1324         }
1325 }
1326
1327
1328 /****************************************************************
1329  *     kaweth_init
1330  ****************************************************************/
1331 static int __init kaweth_init(void)
1332 {
1333         dbg("Driver loading");
1334         return usb_register(&kaweth_driver);
1335 }
1336
1337 /****************************************************************
1338  *     kaweth_exit
1339  ****************************************************************/
1340 static void __exit kaweth_exit(void)
1341 {
1342         usb_deregister(&kaweth_driver);
1343 }
1344
1345 module_init(kaweth_init);
1346 module_exit(kaweth_exit);
1347
1348
1349
1350
1351
1352
1353
1354
1355