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