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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / usb / net / kaweth.c
bloba9a7cf4a38ebd2035cbaf5f1c842f259953583aa
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/sched.h>
50 #include <linux/slab.h>
51 #include <linux/string.h>
52 #include <linux/init.h>
53 #include <linux/delay.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/usb.h>
57 #include <linux/types.h>
58 #include <linux/ethtool.h>
59 #include <linux/pci.h>
60 #include <linux/dma-mapping.h>
61 #include <linux/wait.h>
62 #include <asm/uaccess.h>
63 #include <asm/semaphore.h>
64 #include <asm/byteorder.h>
65
66 #undef DEBUG
67
68 #ifdef DEBUG
69 #define kaweth_dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" ,##arg)
70 #else
71 #define kaweth_dbg(format, arg...) do {} while (0)
72 #endif
73 #define kaweth_err(format, arg...) printk(KERN_ERR __FILE__ ": " format "\n" ,##arg)
74 #define kaweth_info(format, arg...) printk(KERN_INFO __FILE__ ": " format "\n" , ##arg)
75 #define kaweth_warn(format, arg...) printk(KERN_WARNING __FILE__ ": " format "\n" , ##arg)
76
77
78 #include "kawethfw.h"
79
80 #define KAWETH_MTU 1514
81 #define KAWETH_BUF_SIZE 1664
82 #define KAWETH_TX_TIMEOUT (5 * HZ)
83 #define KAWETH_SCRATCH_SIZE 32
84 #define KAWETH_FIRMWARE_BUF_SIZE 4096
85 #define KAWETH_CONTROL_TIMEOUT (30 * HZ)
86
87 #define KAWETH_STATUS_BROKEN 0x0000001
88 #define KAWETH_STATUS_CLOSING 0x0000002
89
90 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
91 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
92 #define KAWETH_PACKET_FILTER_DIRECTED 0x04
93 #define KAWETH_PACKET_FILTER_BROADCAST 0x08
94 #define KAWETH_PACKET_FILTER_MULTICAST 0x10
95
96 /* Table 7 */
97 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
98 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
99 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
100 #define KAWETH_COMMAND_STATISTICS 0x03
101 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06
102 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07
103 #define KAWETH_COMMAND_SET_URB_SIZE 0x08
104 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
105 #define KAWETH_COMMAND_SCAN 0xFF
106
107 #define KAWETH_SOFS_TO_WAIT 0x05
108
109 #define INTBUFFERSIZE 4
110
111 #define STATE_OFFSET 0
112 #define STATE_MASK 0x40
113 #define STATE_SHIFT 5
114
115
116 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>");
117 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
118 MODULE_LICENSE("GPL");
119
120 static const char driver_name[] = "kaweth";
121
122 static int kaweth_probe(
123 struct usb_interface *intf,
124 const struct usb_device_id *id /* from id_table */
125 );
126 static void kaweth_disconnect(struct usb_interface *intf);
127 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
128 unsigned int pipe,
129 struct usb_ctrlrequest *cmd, void *data,
130 int len, int timeout);
131
132 /****************************************************************
133 * usb_device_id
134 ****************************************************************/
135 static struct usb_device_id usb_klsi_table[] = {
136 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
137 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
138 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
139 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
140 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
141 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
142 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
143 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
144 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
145 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
146 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
147 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
148 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
149 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
150 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
151 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
152 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
153 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
154 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
155 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
156 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
157 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
158 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
159 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
160 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
161 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
162 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
163 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
164 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
165 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
166 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
167 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
168 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
169 {} /* Null terminator */
170 };
171
172 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
173
174 /****************************************************************
175 * kaweth_driver
176 ****************************************************************/
177 static struct usb_driver kaweth_driver = {
178 .owner = THIS_MODULE,
179 .name = driver_name,
180 .probe = kaweth_probe,
181 .disconnect = kaweth_disconnect,
182 .id_table = usb_klsi_table,
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 removed;
223 int suspend_lowmem_rx;
224 int suspend_lowmem_ctrl;
225 int linkstate;
226 struct work_struct lowmem_work;
227
228 struct usb_device *dev;
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 /****************************************************************
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 kaweth_dbg("kaweth_control()");
270
271 if(in_interrupt()) {
272 kaweth_dbg("in_interrupt()");
273 return -EBUSY;
274 }
275
276 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
277
278 if (!dr) {
279 kaweth_dbg("kmalloc() failed");
280 return -ENOMEM;
281 }
282
283 dr->bRequestType= requesttype;
284 dr->bRequest = request;
285 dr->wValue = cpu_to_le16p(&value);
286 dr->wIndex = cpu_to_le16p(&index);
287 dr->wLength = cpu_to_le16p(&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 kaweth_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 kaweth_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 kaweth_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 kaweth_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 __u8 *data,
391 __u16 data_len,
392 __u8 interrupt,
393 __u8 type)
394 {
395 if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
396 kaweth_err("Firmware too big: %d", data_len);
397 return -ENOSPC;
398 }
399
400 memcpy(kaweth->firmware_buf, data, data_len);
401
402 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
403 kaweth->firmware_buf[3] = data_len >> 8;
404 kaweth->firmware_buf[4] = type;
405 kaweth->firmware_buf[5] = interrupt;
406
407 kaweth_dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
408 kaweth->firmware_buf[2]);
409
410 kaweth_dbg("Downloading firmware at %p to kaweth device at %p",
411 data,
412 kaweth);
413 kaweth_dbg("Firmware length: %d", data_len);
414
415 return kaweth_control(kaweth,
416 usb_sndctrlpipe(kaweth->dev, 0),
417 KAWETH_COMMAND_SCAN,
418 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
419 0,
420 0,
421 (void *)kaweth->firmware_buf,
422 data_len,
423 KAWETH_CONTROL_TIMEOUT);
424 }
425
426 /****************************************************************
427 * kaweth_trigger_firmware
428 ****************************************************************/
429 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
430 __u8 interrupt)
431 {
432 kaweth->firmware_buf[0] = 0xB6;
433 kaweth->firmware_buf[1] = 0xC3;
434 kaweth->firmware_buf[2] = 0x01;
435 kaweth->firmware_buf[3] = 0x00;
436 kaweth->firmware_buf[4] = 0x06;
437 kaweth->firmware_buf[5] = interrupt;
438 kaweth->firmware_buf[6] = 0x00;
439 kaweth->firmware_buf[7] = 0x00;
440
441 kaweth_dbg("Triggering firmware");
442
443 return kaweth_control(kaweth,
444 usb_sndctrlpipe(kaweth->dev, 0),
445 KAWETH_COMMAND_SCAN,
446 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
447 0,
448 0,
449 (void *)kaweth->firmware_buf,
450 8,
451 KAWETH_CONTROL_TIMEOUT);
452 }
453
454 /****************************************************************
455 * kaweth_reset
456 ****************************************************************/
457 static int kaweth_reset(struct kaweth_device *kaweth)
458 {
459 int result;
460
461 kaweth_dbg("kaweth_reset(%p)", kaweth);
462 result = kaweth_control(kaweth,
463 usb_sndctrlpipe(kaweth->dev, 0),
464 USB_REQ_SET_CONFIGURATION,
465 0,
466 kaweth->dev->config[0].desc.bConfigurationValue,
467 0,
468 NULL,
469 0,
470 KAWETH_CONTROL_TIMEOUT);
471
472 udelay(10000);
473
474 kaweth_dbg("kaweth_reset() returns %d.",result);
475
476 return result;
477 }
478
479 static void kaweth_usb_receive(struct urb *, struct pt_regs *regs);
480 static int kaweth_resubmit_rx_urb(struct kaweth_device *, int);
481
482 /****************************************************************
483 int_callback
484 *****************************************************************/
485
486 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, int mf)
487 {
488 int status;
489
490 status = usb_submit_urb (kaweth->irq_urb, mf);
491 if (unlikely(status == -ENOMEM)) {
492 kaweth->suspend_lowmem_ctrl = 1;
493 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
494 } else {
495 kaweth->suspend_lowmem_ctrl = 0;
496 }
497
498 if (status)
499 err ("can't resubmit intr, %s-%s, status %d",
500 kaweth->dev->bus->bus_name,
501 kaweth->dev->devpath, status);
502 }
503
504 static void int_callback(struct urb *u, struct pt_regs *regs)
505 {
506 struct kaweth_device *kaweth = u->context;
507 int act_state;
508
509 switch (u->status) {
510 case 0: /* success */
511 break;
512 case -ECONNRESET: /* unlink */
513 case -ENOENT:
514 case -ESHUTDOWN:
515 return;
516 /* -EPIPE: should clear the halt */
517 default: /* error */
518 goto resubmit;
519 }
520
521 /* we check the link state to report changes */
522 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
523 if (!act_state)
524 netif_carrier_on(kaweth->net);
525 else
526 netif_carrier_off(kaweth->net);
527
528 kaweth->linkstate = act_state;
529 }
530 resubmit:
531 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
532 }
533
534 static void kaweth_resubmit_tl(void *d)
535 {
536 struct kaweth_device *kaweth = (struct kaweth_device *)d;
537
538 if (kaweth->status | KAWETH_STATUS_CLOSING)
539 return;
540
541 if (kaweth->suspend_lowmem_rx)
542 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
543
544 if (kaweth->suspend_lowmem_ctrl)
545 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
546 }
547
548
549 /****************************************************************
550 * kaweth_resubmit_rx_urb
551 ****************************************************************/
552 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
553 int mem_flags)
554 {
555 int result;
556
557 usb_fill_bulk_urb(kaweth->rx_urb,
558 kaweth->dev,
559 usb_rcvbulkpipe(kaweth->dev, 1),
560 kaweth->rx_buf,
561 KAWETH_BUF_SIZE,
562 kaweth_usb_receive,
563 kaweth);
564 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
565 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
566
567 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
568 if (result == -ENOMEM) {
569 kaweth->suspend_lowmem_rx = 1;
570 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
571 }
572 kaweth_err("resubmitting rx_urb %d failed", result);
573 } else {
574 kaweth->suspend_lowmem_rx = 0;
575 }
576
577 return result;
578 }
579
580 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
581
582 /****************************************************************
583 * kaweth_usb_receive
584 ****************************************************************/
585 static void kaweth_usb_receive(struct urb *urb, struct pt_regs *regs)
586 {
587 struct kaweth_device *kaweth = urb->context;
588 struct net_device *net = kaweth->net;
589
590 int count = urb->actual_length;
591 int count2 = urb->transfer_buffer_length;
592
593 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
594
595 struct sk_buff *skb;
596
597 if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
598 /* we are killed - set a flag and wake the disconnect handler */
599 {
600 kaweth->end = 1;
601 wake_up(&kaweth->term_wait);
602 return;
603 }
604
605 if (kaweth->status & KAWETH_STATUS_CLOSING)
606 return;
607
608 if(urb->status && urb->status != -EREMOTEIO && count != 1) {
609 kaweth_err("%s RX status: %d count: %d packet_len: %d",
610 net->name,
611 urb->status,
612 count,
613 (int)pkt_len);
614 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
615 return;
616 }
617
618 if(kaweth->net && (count > 2)) {
619 if(pkt_len > (count - 2)) {
620 kaweth_err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
621 kaweth_err("Packet len & 2047: %x", pkt_len & 2047);
622 kaweth_err("Count 2: %x", count2);
623 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
624 return;
625 }
626
627 if(!(skb = dev_alloc_skb(pkt_len+2))) {
628 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
629 return;
630 }
631
632 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
633
634 skb->dev = net;
635
636 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
637
638 skb_put(skb, pkt_len);
639
640 skb->protocol = eth_type_trans(skb, net);
641
642 netif_rx(skb);
643
644 kaweth->stats.rx_packets++;
645 kaweth->stats.rx_bytes += pkt_len;
646 }
647
648 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
649 }
650
651 /****************************************************************
652 * kaweth_open
653 ****************************************************************/
654 static int kaweth_open(struct net_device *net)
655 {
656 struct kaweth_device *kaweth = netdev_priv(net);
657 int res;
658
659 kaweth_dbg("Opening network device.");
660
661 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
662 if (res)
663 return -EIO;
664
665 usb_fill_int_urb(
666 kaweth->irq_urb,
667 kaweth->dev,
668 usb_rcvintpipe(kaweth->dev, 3),
669 kaweth->intbuffer,
670 INTBUFFERSIZE,
671 int_callback,
672 kaweth,
673 250); /* overriding the descriptor */
674 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
675 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
676
677 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
678 if (res) {
679 usb_kill_urb(kaweth->rx_urb);
680 return -EIO;
681 }
682
683 netif_start_queue(net);
684
685 kaweth_async_set_rx_mode(kaweth);
686 return 0;
687 }
688
689 /****************************************************************
690 * kaweth_close
691 ****************************************************************/
692 static int kaweth_close(struct net_device *net)
693 {
694 struct kaweth_device *kaweth = netdev_priv(net);
695
696 netif_stop_queue(net);
697
698 kaweth->status |= KAWETH_STATUS_CLOSING;
699
700 usb_kill_urb(kaweth->irq_urb);
701 usb_kill_urb(kaweth->rx_urb);
702
703 flush_scheduled_work();
704
705 /* a scheduled work may have resubmitted,
706 we hit them again */
707 usb_kill_urb(kaweth->irq_urb);
708 usb_kill_urb(kaweth->rx_urb);
709
710 kaweth->status &= ~KAWETH_STATUS_CLOSING;
711
712 return 0;
713 }
714
715 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
716 {
717
718 strlcpy(info->driver, driver_name, sizeof(info->driver));
719 }
720
721 static struct ethtool_ops ops = {
722 .get_drvinfo = kaweth_get_drvinfo
723 };
724
725 /****************************************************************
726 * kaweth_usb_transmit_complete
727 ****************************************************************/
728 static void kaweth_usb_transmit_complete(struct urb *urb, struct pt_regs *regs)
729 {
730 struct kaweth_device *kaweth = urb->context;
731 struct sk_buff *skb = kaweth->tx_skb;
732
733 if (unlikely(urb->status != 0))
734 if (urb->status != -ENOENT)
735 kaweth_dbg("%s: TX status %d.", kaweth->net->name, urb->status);
736
737 netif_wake_queue(kaweth->net);
738 dev_kfree_skb_irq(skb);
739 }
740
741 /****************************************************************
742 * kaweth_start_xmit
743 ****************************************************************/
744 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
745 {
746 struct kaweth_device *kaweth = netdev_priv(net);
747 __le16 *private_header;
748
749 int res;
750
751 spin_lock(&kaweth->device_lock);
752
753 if (kaweth->removed) {
754 /* our device is undergoing disconnection - we bail out */
755 spin_unlock(&kaweth->device_lock);
756 dev_kfree_skb_irq(skb);
757 return 0;
758 }
759
760 kaweth_async_set_rx_mode(kaweth);
761 netif_stop_queue(net);
762
763 /* We now decide whether we can put our special header into the sk_buff */
764 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
765 /* no such luck - we make our own */
766 struct sk_buff *copied_skb;
767 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
768 dev_kfree_skb_irq(skb);
769 skb = copied_skb;
770 if (!copied_skb) {
771 kaweth->stats.tx_errors++;
772 netif_start_queue(net);
773 spin_unlock(&kaweth->device_lock);
774 return 0;
775 }
776 }
777
778 private_header = (__le16 *)__skb_push(skb, 2);
779 *private_header = cpu_to_le16(skb->len-2);
780 kaweth->tx_skb = skb;
781
782 usb_fill_bulk_urb(kaweth->tx_urb,
783 kaweth->dev,
784 usb_sndbulkpipe(kaweth->dev, 2),
785 private_header,
786 skb->len,
787 kaweth_usb_transmit_complete,
788 kaweth);
789 kaweth->end = 0;
790 kaweth->tx_urb->transfer_flags |= URB_ASYNC_UNLINK;
791
792 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
793 {
794 kaweth_warn("kaweth failed tx_urb %d", res);
795 kaweth->stats.tx_errors++;
796
797 netif_start_queue(net);
798 dev_kfree_skb_irq(skb);
799 }
800 else
801 {
802 kaweth->stats.tx_packets++;
803 kaweth->stats.tx_bytes += skb->len;
804 net->trans_start = jiffies;
805 }
806
807 spin_unlock(&kaweth->device_lock);
808
809 return 0;
810 }
811
812 /****************************************************************
813 * kaweth_set_rx_mode
814 ****************************************************************/
815 static void kaweth_set_rx_mode(struct net_device *net)
816 {
817 struct kaweth_device *kaweth = netdev_priv(net);
818
819 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
820 KAWETH_PACKET_FILTER_BROADCAST |
821 KAWETH_PACKET_FILTER_MULTICAST;
822
823 kaweth_dbg("Setting Rx mode to %d", packet_filter_bitmap);
824
825 netif_stop_queue(net);
826
827 if (net->flags & IFF_PROMISC) {
828 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
829 }
830 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
831 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
832 }
833
834 kaweth->packet_filter_bitmap = packet_filter_bitmap;
835 netif_wake_queue(net);
836 }
837
838 /****************************************************************
839 * kaweth_async_set_rx_mode
840 ****************************************************************/
841 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
842 {
843 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
844 kaweth->packet_filter_bitmap = 0;
845 if (packet_filter_bitmap == 0)
846 return;
847
848 {
849 int result;
850 result = kaweth_control(kaweth,
851 usb_sndctrlpipe(kaweth->dev, 0),
852 KAWETH_COMMAND_SET_PACKET_FILTER,
853 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
854 packet_filter_bitmap,
855 0,
856 (void *)&kaweth->scratch,
857 0,
858 KAWETH_CONTROL_TIMEOUT);
859
860 if(result < 0) {
861 kaweth_err("Failed to set Rx mode: %d", result);
862 }
863 else {
864 kaweth_dbg("Set Rx mode to %d", packet_filter_bitmap);
865 }
866 }
867 }
868
869 /****************************************************************
870 * kaweth_netdev_stats
871 ****************************************************************/
872 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
873 {
874 struct kaweth_device *kaweth = netdev_priv(dev);
875 return &kaweth->stats;
876 }
877
878 /****************************************************************
879 * kaweth_tx_timeout
880 ****************************************************************/
881 static void kaweth_tx_timeout(struct net_device *net)
882 {
883 struct kaweth_device *kaweth = netdev_priv(net);
884
885 kaweth_warn("%s: Tx timed out. Resetting.", net->name);
886 kaweth->stats.tx_errors++;
887 net->trans_start = jiffies;
888
889 usb_unlink_urb(kaweth->tx_urb);
890 }
891
892 /****************************************************************
893 * kaweth_probe
894 ****************************************************************/
895 static int kaweth_probe(
896 struct usb_interface *intf,
897 const struct usb_device_id *id /* from id_table */
898 )
899 {
900 struct usb_device *dev = interface_to_usbdev(intf);
901 struct kaweth_device *kaweth;
902 struct net_device *netdev;
903 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
904 int result = 0;
905
906 kaweth_dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
907 dev->devnum,
908 le16_to_cpu(dev->descriptor.idVendor),
909 le16_to_cpu(dev->descriptor.idProduct),
910 le16_to_cpu(dev->descriptor.bcdDevice));
911
912 kaweth_dbg("Device at %p", dev);
913
914 kaweth_dbg("Descriptor length: %x type: %x",
915 (int)dev->descriptor.bLength,
916 (int)dev->descriptor.bDescriptorType);
917
918 netdev = alloc_etherdev(sizeof(*kaweth));
919 if (!netdev)
920 return -ENOMEM;
921
922 kaweth = netdev_priv(netdev);
923 kaweth->dev = dev;
924 kaweth->net = netdev;
925
926 spin_lock_init(&kaweth->device_lock);
927 init_waitqueue_head(&kaweth->term_wait);
928
929 kaweth_dbg("Resetting.");
930
931 kaweth_reset(kaweth);
932
933 /*
934 * If high byte of bcdDevice is nonzero, firmware is already
935 * downloaded. Don't try to do it again, or we'll hang the device.
936 */
937
938 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
939 kaweth_info("Firmware present in device.");
940 } else {
941 /* Download the firmware */
942 kaweth_info("Downloading firmware...");
943 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
944 if ((result = kaweth_download_firmware(kaweth,
945 kaweth_new_code,
946 len_kaweth_new_code,
947 100,
948 2)) < 0) {
949 kaweth_err("Error downloading firmware (%d)", result);
950 goto err_fw;
951 }
952
953 if ((result = kaweth_download_firmware(kaweth,
954 kaweth_new_code_fix,
955 len_kaweth_new_code_fix,
956 100,
957 3)) < 0) {
958 kaweth_err("Error downloading firmware fix (%d)", result);
959 goto err_fw;
960 }
961
962 if ((result = kaweth_download_firmware(kaweth,
963 kaweth_trigger_code,
964 len_kaweth_trigger_code,
965 126,
966 2)) < 0) {
967 kaweth_err("Error downloading trigger code (%d)", result);
968 goto err_fw;
969
970 }
971
972 if ((result = kaweth_download_firmware(kaweth,
973 kaweth_trigger_code_fix,
974 len_kaweth_trigger_code_fix,
975 126,
976 3)) < 0) {
977 kaweth_err("Error downloading trigger code fix (%d)", result);
978 goto err_fw;
979 }
980
981
982 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
983 kaweth_err("Error triggering firmware (%d)", result);
984 goto err_fw;
985 }
986
987 /* Device will now disappear for a moment... */
988 kaweth_info("Firmware loaded. I'll be back...");
989 err_fw:
990 free_page((unsigned long)kaweth->firmware_buf);
991 free_netdev(netdev);
992 return -EIO;
993 }
994
995 result = kaweth_read_configuration(kaweth);
996
997 if(result < 0) {
998 kaweth_err("Error reading configuration (%d), no net device created", result);
999 goto err_free_netdev;
1000 }
1001
1002 kaweth_info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1003 kaweth_info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1004 kaweth_info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1005 kaweth_info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1006 (int)kaweth->configuration.hw_addr[0],
1007 (int)kaweth->configuration.hw_addr[1],
1008 (int)kaweth->configuration.hw_addr[2],
1009 (int)kaweth->configuration.hw_addr[3],
1010 (int)kaweth->configuration.hw_addr[4],
1011 (int)kaweth->configuration.hw_addr[5]);
1012
1013 if(!memcmp(&kaweth->configuration.hw_addr,
1014 &bcast_addr,
1015 sizeof(bcast_addr))) {
1016 kaweth_err("Firmware not functioning properly, no net device created");
1017 goto err_free_netdev;
1018 }
1019
1020 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1021 kaweth_dbg("Error setting URB size");
1022 goto err_free_netdev;
1023 }
1024
1025 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1026 kaweth_err("Error setting SOFS wait");
1027 goto err_free_netdev;
1028 }
1029
1030 result = kaweth_set_receive_filter(kaweth,
1031 KAWETH_PACKET_FILTER_DIRECTED |
1032 KAWETH_PACKET_FILTER_BROADCAST |
1033 KAWETH_PACKET_FILTER_MULTICAST);
1034
1035 if(result < 0) {
1036 kaweth_err("Error setting receive filter");
1037 goto err_free_netdev;
1038 }
1039
1040 kaweth_dbg("Initializing net device.");
1041
1042 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1043 if (!kaweth->tx_urb)
1044 goto err_free_netdev;
1045 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1046 if (!kaweth->rx_urb)
1047 goto err_only_tx;
1048 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1049 if (!kaweth->irq_urb)
1050 goto err_tx_and_rx;
1051
1052 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev,
1053 INTBUFFERSIZE,
1054 GFP_KERNEL,
1055 &kaweth->intbufferhandle);
1056 if (!kaweth->intbuffer)
1057 goto err_tx_and_rx_and_irq;
1058 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev,
1059 KAWETH_BUF_SIZE,
1060 GFP_KERNEL,
1061 &kaweth->rxbufferhandle);
1062 if (!kaweth->rx_buf)
1063 goto err_all_but_rxbuf;
1064
1065 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1066 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1067 sizeof(kaweth->configuration.hw_addr));
1068
1069 netdev->open = kaweth_open;
1070 netdev->stop = kaweth_close;
1071
1072 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1073 netdev->tx_timeout = kaweth_tx_timeout;
1074
1075 netdev->hard_start_xmit = kaweth_start_xmit;
1076 netdev->set_multicast_list = kaweth_set_rx_mode;
1077 netdev->get_stats = kaweth_netdev_stats;
1078 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1079 SET_ETHTOOL_OPS(netdev, &ops);
1080
1081 /* kaweth is zeroed as part of alloc_netdev */
1082
1083 INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1084
1085 SET_MODULE_OWNER(netdev);
1086
1087 usb_set_intfdata(intf, kaweth);
1088
1089 #if 0
1090 // dma_supported() is deeply broken on almost all architectures
1091 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1092 kaweth->net->features |= NETIF_F_HIGHDMA;
1093 #endif
1094
1095 SET_NETDEV_DEV(netdev, &intf->dev);
1096 if (register_netdev(netdev) != 0) {
1097 kaweth_err("Error registering netdev.");
1098 goto err_intfdata;
1099 }
1100
1101 kaweth_info("kaweth interface created at %s", kaweth->net->name);
1102
1103 kaweth_dbg("Kaweth probe returning.");
1104
1105 return 0;
1106
1107 err_intfdata:
1108 usb_set_intfdata(intf, NULL);
1109 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1110 err_all_but_rxbuf:
1111 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1112 err_tx_and_rx_and_irq:
1113 usb_free_urb(kaweth->irq_urb);
1114 err_tx_and_rx:
1115 usb_free_urb(kaweth->rx_urb);
1116 err_only_tx:
1117 usb_free_urb(kaweth->tx_urb);
1118 err_free_netdev:
1119 free_netdev(netdev);
1120
1121 return -EIO;
1122 }
1123
1124 /****************************************************************
1125 * kaweth_disconnect
1126 ****************************************************************/
1127 static void kaweth_disconnect(struct usb_interface *intf)
1128 {
1129 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1130 struct net_device *netdev;
1131
1132 kaweth_info("Unregistering");
1133
1134 usb_set_intfdata(intf, NULL);
1135 if (!kaweth) {
1136 kaweth_warn("unregistering non-existant device");
1137 return;
1138 }
1139 netdev = kaweth->net;
1140 kaweth->removed = 1;
1141 usb_kill_urb(kaweth->irq_urb);
1142 usb_kill_urb(kaweth->rx_urb);
1143 usb_kill_urb(kaweth->tx_urb);
1144
1145 kaweth_dbg("Unregistering net device");
1146 unregister_netdev(netdev);
1147
1148 usb_free_urb(kaweth->rx_urb);
1149 usb_free_urb(kaweth->tx_urb);
1150 usb_free_urb(kaweth->irq_urb);
1151
1152 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1153 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1154
1155 free_netdev(netdev);
1156 }
1157
1158
1159 // FIXME this completion stuff is a modified clone of
1160 // an OLD version of some stuff in usb.c ...
1161 struct usb_api_data {
1162 wait_queue_head_t wqh;
1163 int done;
1164 };
1165
1166 /*-------------------------------------------------------------------*
1167 * completion handler for compatibility wrappers (sync control/bulk) *
1168 *-------------------------------------------------------------------*/
1169 static void usb_api_blocking_completion(struct urb *urb, struct pt_regs *regs)
1170 {
1171 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1172
1173 awd->done=1;
1174 wake_up(&awd->wqh);
1175 }
1176
1177 /*-------------------------------------------------------------------*
1178 * COMPATIBILITY STUFF *
1179 *-------------------------------------------------------------------*/
1180
1181 // Starts urb and waits for completion or timeout
1182 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1183 {
1184 struct usb_api_data awd;
1185 int status;
1186
1187 init_waitqueue_head(&awd.wqh);
1188 awd.done = 0;
1189
1190 urb->context = &awd;
1191 status = usb_submit_urb(urb, GFP_NOIO);
1192 if (status) {
1193 // something went wrong
1194 usb_free_urb(urb);
1195 return status;
1196 }
1197
1198 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1199 // timeout
1200 kaweth_warn("usb_control/bulk_msg: timeout");
1201 usb_kill_urb(urb); // remove urb safely
1202 status = -ETIMEDOUT;
1203 }
1204 else {
1205 status = urb->status;
1206 }
1207
1208 if (actual_length) {
1209 *actual_length = urb->actual_length;
1210 }
1211
1212 usb_free_urb(urb);
1213 return status;
1214 }
1215
1216 /*-------------------------------------------------------------------*/
1217 // returns status (negative) or length (positive)
1218 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1219 unsigned int pipe,
1220 struct usb_ctrlrequest *cmd, void *data,
1221 int len, int timeout)
1222 {
1223 struct urb *urb;
1224 int retv;
1225 int length;
1226
1227 urb = usb_alloc_urb(0, GFP_NOIO);
1228 if (!urb)
1229 return -ENOMEM;
1230
1231 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1232 len, usb_api_blocking_completion, NULL);
1233
1234 retv = usb_start_wait_urb(urb, timeout, &length);
1235 if (retv < 0) {
1236 return retv;
1237 }
1238 else {
1239 return length;
1240 }
1241 }
1242
1243
1244 /****************************************************************
1245 * kaweth_init
1246 ****************************************************************/
1247 static int __init kaweth_init(void)
1248 {
1249 kaweth_dbg("Driver loading");
1250 return usb_register(&kaweth_driver);
1251 }
1252
1253 /****************************************************************
1254 * kaweth_exit
1255 ****************************************************************/
1256 static void __exit kaweth_exit(void)
1257 {
1258 usb_deregister(&kaweth_driver);
1259 }
1260
1261 module_init(kaweth_init);
1262 module_exit(kaweth_exit);
1263
1264
1265
1266
1267
1268
1269
1270
1271
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