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Pull bugzilla-9429 into release branch
[pv_ops_mirror.git] / drivers / net / usb / kaweth.c
blob58a53a641754ba74fefd04fa048c649cc6f4faee
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 <asm/uaccess.h>
61 #include <asm/semaphore.h>
62 #include <asm/byteorder.h>
63
64 #undef DEBUG
65
66 #include "kawethfw.h"
67
68 #define KAWETH_MTU 1514
69 #define KAWETH_BUF_SIZE 1664
70 #define KAWETH_TX_TIMEOUT (5 * HZ)
71 #define KAWETH_SCRATCH_SIZE 32
72 #define KAWETH_FIRMWARE_BUF_SIZE 4096
73 #define KAWETH_CONTROL_TIMEOUT (30 * HZ)
74
75 #define KAWETH_STATUS_BROKEN 0x0000001
76 #define KAWETH_STATUS_CLOSING 0x0000002
77 #define KAWETH_STATUS_SUSPENDING 0x0000004
78
79 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
80
81 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
82 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
83 #define KAWETH_PACKET_FILTER_DIRECTED 0x04
84 #define KAWETH_PACKET_FILTER_BROADCAST 0x08
85 #define KAWETH_PACKET_FILTER_MULTICAST 0x10
86
87 /* Table 7 */
88 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
89 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
90 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
91 #define KAWETH_COMMAND_STATISTICS 0x03
92 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06
93 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07
94 #define KAWETH_COMMAND_SET_URB_SIZE 0x08
95 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
96 #define KAWETH_COMMAND_SCAN 0xFF
97
98 #define KAWETH_SOFS_TO_WAIT 0x05
99
100 #define INTBUFFERSIZE 4
101
102 #define STATE_OFFSET 0
103 #define STATE_MASK 0x40
104 #define STATE_SHIFT 5
105
106 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
107
108
109 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>");
110 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
111 MODULE_LICENSE("GPL");
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(0x0846, 0x1001) }, /* NetGear EA-101 */
149 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
150 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
151 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
152 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
153 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
154 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
155 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
156 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
157 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
158 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
159 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
160 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
161 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
162 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
163 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
164 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
165 {} /* Null terminator */
166 };
167
168 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
169
170 /****************************************************************
171 * kaweth_driver
172 ****************************************************************/
173 static struct usb_driver kaweth_driver = {
174 .name = driver_name,
175 .probe = kaweth_probe,
176 .disconnect = kaweth_disconnect,
177 .suspend = kaweth_suspend,
178 .resume = kaweth_resume,
179 .id_table = usb_klsi_table,
180 .supports_autosuspend = 1,
181 };
182
183 typedef __u8 eth_addr_t[6];
184
185 /****************************************************************
186 * usb_eth_dev
187 ****************************************************************/
188 struct usb_eth_dev {
189 char *name;
190 __u16 vendor;
191 __u16 device;
192 void *pdata;
193 };
194
195 /****************************************************************
196 * kaweth_ethernet_configuration
197 * Refer Table 8
198 ****************************************************************/
199 struct kaweth_ethernet_configuration
200 {
201 __u8 size;
202 __u8 reserved1;
203 __u8 reserved2;
204 eth_addr_t hw_addr;
205 __u32 statistics_mask;
206 __le16 segment_size;
207 __u16 max_multicast_filters;
208 __u8 reserved3;
209 } __attribute__ ((packed));
210
211 /****************************************************************
212 * kaweth_device
213 ****************************************************************/
214 struct kaweth_device
215 {
216 spinlock_t device_lock;
217
218 __u32 status;
219 int end;
220 int suspend_lowmem_rx;
221 int suspend_lowmem_ctrl;
222 int linkstate;
223 int opened;
224 struct delayed_work lowmem_work;
225
226 struct usb_device *dev;
227 struct usb_interface *intf;
228 struct net_device *net;
229 wait_queue_head_t term_wait;
230
231 struct urb *rx_urb;
232 struct urb *tx_urb;
233 struct urb *irq_urb;
234
235 dma_addr_t intbufferhandle;
236 __u8 *intbuffer;
237 dma_addr_t rxbufferhandle;
238 __u8 *rx_buf;
239
240
241 struct sk_buff *tx_skb;
242
243 __u8 *firmware_buf;
244 __u8 scratch[KAWETH_SCRATCH_SIZE];
245 __u16 packet_filter_bitmap;
246
247 struct kaweth_ethernet_configuration configuration;
248
249 struct net_device_stats stats;
250 };
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
268 dbg("kaweth_control()");
269
270 if(in_interrupt()) {
271 dbg("in_interrupt()");
272 return -EBUSY;
273 }
274
275 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
276
277 if (!dr) {
278 dbg("kmalloc() failed");
279 return -ENOMEM;
280 }
281
282 dr->bRequestType= requesttype;
283 dr->bRequest = request;
284 dr->wValue = cpu_to_le16p(&value);
285 dr->wIndex = cpu_to_le16p(&index);
286 dr->wLength = cpu_to_le16p(&size);
287
288 return kaweth_internal_control_msg(kaweth->dev,
289 pipe,
290 dr,
291 data,
292 size,
293 timeout);
294 }
295
296 /****************************************************************
297 * kaweth_read_configuration
298 ****************************************************************/
299 static int kaweth_read_configuration(struct kaweth_device *kaweth)
300 {
301 int retval;
302
303 dbg("Reading kaweth configuration");
304
305 retval = kaweth_control(kaweth,
306 usb_rcvctrlpipe(kaweth->dev, 0),
307 KAWETH_COMMAND_GET_ETHERNET_DESC,
308 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
309 0,
310 0,
311 (void *)&kaweth->configuration,
312 sizeof(kaweth->configuration),
313 KAWETH_CONTROL_TIMEOUT);
314
315 return retval;
316 }
317
318 /****************************************************************
319 * kaweth_set_urb_size
320 ****************************************************************/
321 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
322 {
323 int retval;
324
325 dbg("Setting URB size to %d", (unsigned)urb_size);
326
327 retval = kaweth_control(kaweth,
328 usb_sndctrlpipe(kaweth->dev, 0),
329 KAWETH_COMMAND_SET_URB_SIZE,
330 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
331 urb_size,
332 0,
333 (void *)&kaweth->scratch,
334 0,
335 KAWETH_CONTROL_TIMEOUT);
336
337 return retval;
338 }
339
340 /****************************************************************
341 * kaweth_set_sofs_wait
342 ****************************************************************/
343 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
344 {
345 int retval;
346
347 dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
348
349 retval = kaweth_control(kaweth,
350 usb_sndctrlpipe(kaweth->dev, 0),
351 KAWETH_COMMAND_SET_SOFS_WAIT,
352 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
353 sofs_wait,
354 0,
355 (void *)&kaweth->scratch,
356 0,
357 KAWETH_CONTROL_TIMEOUT);
358
359 return retval;
360 }
361
362 /****************************************************************
363 * kaweth_set_receive_filter
364 ****************************************************************/
365 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
366 __u16 receive_filter)
367 {
368 int retval;
369
370 dbg("Set receive filter to %d", (unsigned)receive_filter);
371
372 retval = kaweth_control(kaweth,
373 usb_sndctrlpipe(kaweth->dev, 0),
374 KAWETH_COMMAND_SET_PACKET_FILTER,
375 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
376 receive_filter,
377 0,
378 (void *)&kaweth->scratch,
379 0,
380 KAWETH_CONTROL_TIMEOUT);
381
382 return retval;
383 }
384
385 /****************************************************************
386 * kaweth_download_firmware
387 ****************************************************************/
388 static int kaweth_download_firmware(struct kaweth_device *kaweth,
389 __u8 *data,
390 __u16 data_len,
391 __u8 interrupt,
392 __u8 type)
393 {
394 if(data_len > KAWETH_FIRMWARE_BUF_SIZE) {
395 err("Firmware too big: %d", data_len);
396 return -ENOSPC;
397 }
398
399 memcpy(kaweth->firmware_buf, data, data_len);
400
401 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
402 kaweth->firmware_buf[3] = data_len >> 8;
403 kaweth->firmware_buf[4] = type;
404 kaweth->firmware_buf[5] = interrupt;
405
406 dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
407 kaweth->firmware_buf[2]);
408
409 dbg("Downloading firmware at %p to kaweth device at %p",
410 data,
411 kaweth);
412 dbg("Firmware length: %d", data_len);
413
414 return kaweth_control(kaweth,
415 usb_sndctrlpipe(kaweth->dev, 0),
416 KAWETH_COMMAND_SCAN,
417 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
418 0,
419 0,
420 (void *)kaweth->firmware_buf,
421 data_len,
422 KAWETH_CONTROL_TIMEOUT);
423 }
424
425 /****************************************************************
426 * kaweth_trigger_firmware
427 ****************************************************************/
428 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
429 __u8 interrupt)
430 {
431 kaweth->firmware_buf[0] = 0xB6;
432 kaweth->firmware_buf[1] = 0xC3;
433 kaweth->firmware_buf[2] = 0x01;
434 kaweth->firmware_buf[3] = 0x00;
435 kaweth->firmware_buf[4] = 0x06;
436 kaweth->firmware_buf[5] = interrupt;
437 kaweth->firmware_buf[6] = 0x00;
438 kaweth->firmware_buf[7] = 0x00;
439
440 dbg("Triggering firmware");
441
442 return kaweth_control(kaweth,
443 usb_sndctrlpipe(kaweth->dev, 0),
444 KAWETH_COMMAND_SCAN,
445 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
446 0,
447 0,
448 (void *)kaweth->firmware_buf,
449 8,
450 KAWETH_CONTROL_TIMEOUT);
451 }
452
453 /****************************************************************
454 * kaweth_reset
455 ****************************************************************/
456 static int kaweth_reset(struct kaweth_device *kaweth)
457 {
458 int result;
459
460 dbg("kaweth_reset(%p)", kaweth);
461 result = kaweth_control(kaweth,
462 usb_sndctrlpipe(kaweth->dev, 0),
463 USB_REQ_SET_CONFIGURATION,
464 0,
465 kaweth->dev->config[0].desc.bConfigurationValue,
466 0,
467 NULL,
468 0,
469 KAWETH_CONTROL_TIMEOUT);
470
471 mdelay(10);
472
473 dbg("kaweth_reset() returns %d.",result);
474
475 return result;
476 }
477
478 static void kaweth_usb_receive(struct urb *);
479 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
480
481 /****************************************************************
482 int_callback
483 *****************************************************************/
484
485 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
486 {
487 int status;
488
489 status = usb_submit_urb (kaweth->irq_urb, mf);
490 if (unlikely(status == -ENOMEM)) {
491 kaweth->suspend_lowmem_ctrl = 1;
492 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
493 } else {
494 kaweth->suspend_lowmem_ctrl = 0;
495 }
496
497 if (status)
498 err ("can't resubmit intr, %s-%s, status %d",
499 kaweth->dev->bus->bus_name,
500 kaweth->dev->devpath, status);
501 }
502
503 static void int_callback(struct urb *u)
504 {
505 struct kaweth_device *kaweth = u->context;
506 int act_state;
507
508 switch (u->status) {
509 case 0: /* success */
510 break;
511 case -ECONNRESET: /* unlink */
512 case -ENOENT:
513 case -ESHUTDOWN:
514 return;
515 /* -EPIPE: should clear the halt */
516 default: /* error */
517 goto resubmit;
518 }
519
520 /* we check the link state to report changes */
521 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
522 if (act_state)
523 netif_carrier_on(kaweth->net);
524 else
525 netif_carrier_off(kaweth->net);
526
527 kaweth->linkstate = act_state;
528 }
529 resubmit:
530 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
531 }
532
533 static void kaweth_resubmit_tl(struct work_struct *work)
534 {
535 struct kaweth_device *kaweth =
536 container_of(work, struct kaweth_device, lowmem_work.work);
537
538 if (IS_BLOCKED(kaweth->status))
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 gfp_t 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 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)
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 spin_lock(&kaweth->device_lock);
606 if (IS_BLOCKED(kaweth->status)) {
607 spin_unlock(&kaweth->device_lock);
608 return;
609 }
610 spin_unlock(&kaweth->device_lock);
611
612 if(urb->status && urb->status != -EREMOTEIO && count != 1) {
613 err("%s RX status: %d count: %d packet_len: %d",
614 net->name,
615 urb->status,
616 count,
617 (int)pkt_len);
618 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
619 return;
620 }
621
622 if(kaweth->net && (count > 2)) {
623 if(pkt_len > (count - 2)) {
624 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
625 err("Packet len & 2047: %x", pkt_len & 2047);
626 err("Count 2: %x", count2);
627 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
628 return;
629 }
630
631 if(!(skb = dev_alloc_skb(pkt_len+2))) {
632 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
633 return;
634 }
635
636 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
637
638 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
639
640 skb_put(skb, pkt_len);
641
642 skb->protocol = eth_type_trans(skb, net);
643
644 netif_rx(skb);
645
646 kaweth->stats.rx_packets++;
647 kaweth->stats.rx_bytes += pkt_len;
648 }
649
650 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
651 }
652
653 /****************************************************************
654 * kaweth_open
655 ****************************************************************/
656 static int kaweth_open(struct net_device *net)
657 {
658 struct kaweth_device *kaweth = netdev_priv(net);
659 int res;
660
661 dbg("Opening network device.");
662
663 res = usb_autopm_get_interface(kaweth->intf);
664 if (res) {
665 err("Interface cannot be resumed.");
666 return -EIO;
667 }
668 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
669 if (res)
670 goto err_out;
671
672 usb_fill_int_urb(
673 kaweth->irq_urb,
674 kaweth->dev,
675 usb_rcvintpipe(kaweth->dev, 3),
676 kaweth->intbuffer,
677 INTBUFFERSIZE,
678 int_callback,
679 kaweth,
680 250); /* overriding the descriptor */
681 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
682 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
683
684 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
685 if (res) {
686 usb_kill_urb(kaweth->rx_urb);
687 goto err_out;
688 }
689 kaweth->opened = 1;
690
691 netif_start_queue(net);
692
693 kaweth_async_set_rx_mode(kaweth);
694 return 0;
695
696 err_out:
697 usb_autopm_enable(kaweth->intf);
698 return -EIO;
699 }
700
701 /****************************************************************
702 * kaweth_kill_urbs
703 ****************************************************************/
704 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
705 {
706 usb_kill_urb(kaweth->irq_urb);
707 usb_kill_urb(kaweth->rx_urb);
708 usb_kill_urb(kaweth->tx_urb);
709
710 flush_scheduled_work();
711
712 /* a scheduled work may have resubmitted,
713 we hit them again */
714 usb_kill_urb(kaweth->irq_urb);
715 usb_kill_urb(kaweth->rx_urb);
716 }
717
718 /****************************************************************
719 * kaweth_close
720 ****************************************************************/
721 static int kaweth_close(struct net_device *net)
722 {
723 struct kaweth_device *kaweth = netdev_priv(net);
724
725 netif_stop_queue(net);
726 kaweth->opened = 0;
727
728 kaweth->status |= KAWETH_STATUS_CLOSING;
729
730 kaweth_kill_urbs(kaweth);
731
732 kaweth->status &= ~KAWETH_STATUS_CLOSING;
733
734 usb_autopm_enable(kaweth->intf);
735
736 return 0;
737 }
738
739 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
740 {
741 struct kaweth_device *kaweth = netdev_priv(dev);
742
743 strlcpy(info->driver, driver_name, sizeof(info->driver));
744 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
745 }
746
747 static u32 kaweth_get_link(struct net_device *dev)
748 {
749 struct kaweth_device *kaweth = netdev_priv(dev);
750
751 return kaweth->linkstate;
752 }
753
754 static struct ethtool_ops ops = {
755 .get_drvinfo = kaweth_get_drvinfo,
756 .get_link = kaweth_get_link
757 };
758
759 /****************************************************************
760 * kaweth_usb_transmit_complete
761 ****************************************************************/
762 static void kaweth_usb_transmit_complete(struct urb *urb)
763 {
764 struct kaweth_device *kaweth = urb->context;
765 struct sk_buff *skb = kaweth->tx_skb;
766
767 if (unlikely(urb->status != 0))
768 if (urb->status != -ENOENT)
769 dbg("%s: TX status %d.", kaweth->net->name, urb->status);
770
771 netif_wake_queue(kaweth->net);
772 dev_kfree_skb_irq(skb);
773 }
774
775 /****************************************************************
776 * kaweth_start_xmit
777 ****************************************************************/
778 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
779 {
780 struct kaweth_device *kaweth = netdev_priv(net);
781 __le16 *private_header;
782
783 int res;
784
785 spin_lock(&kaweth->device_lock);
786
787 kaweth_async_set_rx_mode(kaweth);
788 netif_stop_queue(net);
789 if (IS_BLOCKED(kaweth->status)) {
790 goto skip;
791 }
792
793 /* We now decide whether we can put our special header into the sk_buff */
794 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
795 /* no such luck - we make our own */
796 struct sk_buff *copied_skb;
797 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
798 dev_kfree_skb_irq(skb);
799 skb = copied_skb;
800 if (!copied_skb) {
801 kaweth->stats.tx_errors++;
802 netif_start_queue(net);
803 spin_unlock(&kaweth->device_lock);
804 return 0;
805 }
806 }
807
808 private_header = (__le16 *)__skb_push(skb, 2);
809 *private_header = cpu_to_le16(skb->len-2);
810 kaweth->tx_skb = skb;
811
812 usb_fill_bulk_urb(kaweth->tx_urb,
813 kaweth->dev,
814 usb_sndbulkpipe(kaweth->dev, 2),
815 private_header,
816 skb->len,
817 kaweth_usb_transmit_complete,
818 kaweth);
819 kaweth->end = 0;
820
821 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
822 {
823 warn("kaweth failed tx_urb %d", res);
824 skip:
825 kaweth->stats.tx_errors++;
826
827 netif_start_queue(net);
828 dev_kfree_skb_irq(skb);
829 }
830 else
831 {
832 kaweth->stats.tx_packets++;
833 kaweth->stats.tx_bytes += skb->len;
834 net->trans_start = jiffies;
835 }
836
837 spin_unlock(&kaweth->device_lock);
838
839 return 0;
840 }
841
842 /****************************************************************
843 * kaweth_set_rx_mode
844 ****************************************************************/
845 static void kaweth_set_rx_mode(struct net_device *net)
846 {
847 struct kaweth_device *kaweth = netdev_priv(net);
848
849 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
850 KAWETH_PACKET_FILTER_BROADCAST |
851 KAWETH_PACKET_FILTER_MULTICAST;
852
853 dbg("Setting Rx mode to %d", packet_filter_bitmap);
854
855 netif_stop_queue(net);
856
857 if (net->flags & IFF_PROMISC) {
858 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
859 }
860 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
861 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
862 }
863
864 kaweth->packet_filter_bitmap = packet_filter_bitmap;
865 netif_wake_queue(net);
866 }
867
868 /****************************************************************
869 * kaweth_async_set_rx_mode
870 ****************************************************************/
871 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
872 {
873 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
874 kaweth->packet_filter_bitmap = 0;
875 if (packet_filter_bitmap == 0)
876 return;
877
878 {
879 int result;
880 result = kaweth_control(kaweth,
881 usb_sndctrlpipe(kaweth->dev, 0),
882 KAWETH_COMMAND_SET_PACKET_FILTER,
883 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
884 packet_filter_bitmap,
885 0,
886 (void *)&kaweth->scratch,
887 0,
888 KAWETH_CONTROL_TIMEOUT);
889
890 if(result < 0) {
891 err("Failed to set Rx mode: %d", result);
892 }
893 else {
894 dbg("Set Rx mode to %d", packet_filter_bitmap);
895 }
896 }
897 }
898
899 /****************************************************************
900 * kaweth_netdev_stats
901 ****************************************************************/
902 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
903 {
904 struct kaweth_device *kaweth = netdev_priv(dev);
905 return &kaweth->stats;
906 }
907
908 /****************************************************************
909 * kaweth_tx_timeout
910 ****************************************************************/
911 static void kaweth_tx_timeout(struct net_device *net)
912 {
913 struct kaweth_device *kaweth = netdev_priv(net);
914
915 warn("%s: Tx timed out. Resetting.", net->name);
916 kaweth->stats.tx_errors++;
917 net->trans_start = jiffies;
918
919 usb_unlink_urb(kaweth->tx_urb);
920 }
921
922 /****************************************************************
923 * kaweth_suspend
924 ****************************************************************/
925 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
926 {
927 struct kaweth_device *kaweth = usb_get_intfdata(intf);
928 unsigned long flags;
929
930 dbg("Suspending device");
931 spin_lock_irqsave(&kaweth->device_lock, flags);
932 kaweth->status |= KAWETH_STATUS_SUSPENDING;
933 spin_unlock_irqrestore(&kaweth->device_lock, flags);
934
935 kaweth_kill_urbs(kaweth);
936 return 0;
937 }
938
939 /****************************************************************
940 * kaweth_resume
941 ****************************************************************/
942 static int kaweth_resume(struct usb_interface *intf)
943 {
944 struct kaweth_device *kaweth = usb_get_intfdata(intf);
945 unsigned long flags;
946
947 dbg("Resuming device");
948 spin_lock_irqsave(&kaweth->device_lock, flags);
949 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
950 spin_unlock_irqrestore(&kaweth->device_lock, flags);
951
952 if (!kaweth->opened)
953 return 0;
954 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
955 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
956
957 return 0;
958 }
959
960 /****************************************************************
961 * kaweth_probe
962 ****************************************************************/
963 static int kaweth_probe(
964 struct usb_interface *intf,
965 const struct usb_device_id *id /* from id_table */
966 )
967 {
968 struct usb_device *dev = interface_to_usbdev(intf);
969 struct kaweth_device *kaweth;
970 struct net_device *netdev;
971 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
972 int result = 0;
973
974 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
975 dev->devnum,
976 le16_to_cpu(dev->descriptor.idVendor),
977 le16_to_cpu(dev->descriptor.idProduct),
978 le16_to_cpu(dev->descriptor.bcdDevice));
979
980 dbg("Device at %p", dev);
981
982 dbg("Descriptor length: %x type: %x",
983 (int)dev->descriptor.bLength,
984 (int)dev->descriptor.bDescriptorType);
985
986 netdev = alloc_etherdev(sizeof(*kaweth));
987 if (!netdev)
988 return -ENOMEM;
989
990 kaweth = netdev_priv(netdev);
991 kaweth->dev = dev;
992 kaweth->net = netdev;
993
994 spin_lock_init(&kaweth->device_lock);
995 init_waitqueue_head(&kaweth->term_wait);
996
997 dbg("Resetting.");
998
999 kaweth_reset(kaweth);
1000
1001 /*
1002 * If high byte of bcdDevice is nonzero, firmware is already
1003 * downloaded. Don't try to do it again, or we'll hang the device.
1004 */
1005
1006 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1007 info("Firmware present in device.");
1008 } else {
1009 /* Download the firmware */
1010 info("Downloading firmware...");
1011 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1012 if ((result = kaweth_download_firmware(kaweth,
1013 kaweth_new_code,
1014 len_kaweth_new_code,
1015 100,
1016 2)) < 0) {
1017 err("Error downloading firmware (%d)", result);
1018 goto err_fw;
1019 }
1020
1021 if ((result = kaweth_download_firmware(kaweth,
1022 kaweth_new_code_fix,
1023 len_kaweth_new_code_fix,
1024 100,
1025 3)) < 0) {
1026 err("Error downloading firmware fix (%d)", result);
1027 goto err_fw;
1028 }
1029
1030 if ((result = kaweth_download_firmware(kaweth,
1031 kaweth_trigger_code,
1032 len_kaweth_trigger_code,
1033 126,
1034 2)) < 0) {
1035 err("Error downloading trigger code (%d)", result);
1036 goto err_fw;
1037
1038 }
1039
1040 if ((result = kaweth_download_firmware(kaweth,
1041 kaweth_trigger_code_fix,
1042 len_kaweth_trigger_code_fix,
1043 126,
1044 3)) < 0) {
1045 err("Error downloading trigger code fix (%d)", result);
1046 goto err_fw;
1047 }
1048
1049
1050 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1051 err("Error triggering firmware (%d)", result);
1052 goto err_fw;
1053 }
1054
1055 /* Device will now disappear for a moment... */
1056 info("Firmware loaded. I'll be back...");
1057 err_fw:
1058 free_page((unsigned long)kaweth->firmware_buf);
1059 free_netdev(netdev);
1060 return -EIO;
1061 }
1062
1063 result = kaweth_read_configuration(kaweth);
1064
1065 if(result < 0) {
1066 err("Error reading configuration (%d), no net device created", result);
1067 goto err_free_netdev;
1068 }
1069
1070 info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1071 info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1072 info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1073 info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1074 (int)kaweth->configuration.hw_addr[0],
1075 (int)kaweth->configuration.hw_addr[1],
1076 (int)kaweth->configuration.hw_addr[2],
1077 (int)kaweth->configuration.hw_addr[3],
1078 (int)kaweth->configuration.hw_addr[4],
1079 (int)kaweth->configuration.hw_addr[5]);
1080
1081 if(!memcmp(&kaweth->configuration.hw_addr,
1082 &bcast_addr,
1083 sizeof(bcast_addr))) {
1084 err("Firmware not functioning properly, no net device created");
1085 goto err_free_netdev;
1086 }
1087
1088 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1089 dbg("Error setting URB size");
1090 goto err_free_netdev;
1091 }
1092
1093 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1094 err("Error setting SOFS wait");
1095 goto err_free_netdev;
1096 }
1097
1098 result = kaweth_set_receive_filter(kaweth,
1099 KAWETH_PACKET_FILTER_DIRECTED |
1100 KAWETH_PACKET_FILTER_BROADCAST |
1101 KAWETH_PACKET_FILTER_MULTICAST);
1102
1103 if(result < 0) {
1104 err("Error setting receive filter");
1105 goto err_free_netdev;
1106 }
1107
1108 dbg("Initializing net device.");
1109
1110 kaweth->intf = intf;
1111
1112 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1113 if (!kaweth->tx_urb)
1114 goto err_free_netdev;
1115 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1116 if (!kaweth->rx_urb)
1117 goto err_only_tx;
1118 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1119 if (!kaweth->irq_urb)
1120 goto err_tx_and_rx;
1121
1122 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev,
1123 INTBUFFERSIZE,
1124 GFP_KERNEL,
1125 &kaweth->intbufferhandle);
1126 if (!kaweth->intbuffer)
1127 goto err_tx_and_rx_and_irq;
1128 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev,
1129 KAWETH_BUF_SIZE,
1130 GFP_KERNEL,
1131 &kaweth->rxbufferhandle);
1132 if (!kaweth->rx_buf)
1133 goto err_all_but_rxbuf;
1134
1135 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1136 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1137 sizeof(kaweth->configuration.hw_addr));
1138
1139 netdev->open = kaweth_open;
1140 netdev->stop = kaweth_close;
1141
1142 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1143 netdev->tx_timeout = kaweth_tx_timeout;
1144
1145 netdev->hard_start_xmit = kaweth_start_xmit;
1146 netdev->set_multicast_list = kaweth_set_rx_mode;
1147 netdev->get_stats = kaweth_netdev_stats;
1148 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1149 SET_ETHTOOL_OPS(netdev, &ops);
1150
1151 /* kaweth is zeroed as part of alloc_netdev */
1152
1153 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1154
1155 usb_set_intfdata(intf, kaweth);
1156
1157 #if 0
1158 // dma_supported() is deeply broken on almost all architectures
1159 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1160 kaweth->net->features |= NETIF_F_HIGHDMA;
1161 #endif
1162
1163 SET_NETDEV_DEV(netdev, &intf->dev);
1164 if (register_netdev(netdev) != 0) {
1165 err("Error registering netdev.");
1166 goto err_intfdata;
1167 }
1168
1169 info("kaweth interface created at %s", kaweth->net->name);
1170
1171 dbg("Kaweth probe returning.");
1172
1173 return 0;
1174
1175 err_intfdata:
1176 usb_set_intfdata(intf, NULL);
1177 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1178 err_all_but_rxbuf:
1179 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1180 err_tx_and_rx_and_irq:
1181 usb_free_urb(kaweth->irq_urb);
1182 err_tx_and_rx:
1183 usb_free_urb(kaweth->rx_urb);
1184 err_only_tx:
1185 usb_free_urb(kaweth->tx_urb);
1186 err_free_netdev:
1187 free_netdev(netdev);
1188
1189 return -EIO;
1190 }
1191
1192 /****************************************************************
1193 * kaweth_disconnect
1194 ****************************************************************/
1195 static void kaweth_disconnect(struct usb_interface *intf)
1196 {
1197 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1198 struct net_device *netdev;
1199
1200 info("Unregistering");
1201
1202 usb_set_intfdata(intf, NULL);
1203 if (!kaweth) {
1204 warn("unregistering non-existant device");
1205 return;
1206 }
1207 netdev = kaweth->net;
1208
1209 dbg("Unregistering net device");
1210 unregister_netdev(netdev);
1211
1212 usb_free_urb(kaweth->rx_urb);
1213 usb_free_urb(kaweth->tx_urb);
1214 usb_free_urb(kaweth->irq_urb);
1215
1216 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1217 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1218
1219 free_netdev(netdev);
1220 }
1221
1222
1223 // FIXME this completion stuff is a modified clone of
1224 // an OLD version of some stuff in usb.c ...
1225 struct usb_api_data {
1226 wait_queue_head_t wqh;
1227 int done;
1228 };
1229
1230 /*-------------------------------------------------------------------*
1231 * completion handler for compatibility wrappers (sync control/bulk) *
1232 *-------------------------------------------------------------------*/
1233 static void usb_api_blocking_completion(struct urb *urb)
1234 {
1235 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1236
1237 awd->done=1;
1238 wake_up(&awd->wqh);
1239 }
1240
1241 /*-------------------------------------------------------------------*
1242 * COMPATIBILITY STUFF *
1243 *-------------------------------------------------------------------*/
1244
1245 // Starts urb and waits for completion or timeout
1246 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1247 {
1248 struct usb_api_data awd;
1249 int status;
1250
1251 init_waitqueue_head(&awd.wqh);
1252 awd.done = 0;
1253
1254 urb->context = &awd;
1255 status = usb_submit_urb(urb, GFP_NOIO);
1256 if (status) {
1257 // something went wrong
1258 usb_free_urb(urb);
1259 return status;
1260 }
1261
1262 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1263 // timeout
1264 warn("usb_control/bulk_msg: timeout");
1265 usb_kill_urb(urb); // remove urb safely
1266 status = -ETIMEDOUT;
1267 }
1268 else {
1269 status = urb->status;
1270 }
1271
1272 if (actual_length) {
1273 *actual_length = urb->actual_length;
1274 }
1275
1276 usb_free_urb(urb);
1277 return status;
1278 }
1279
1280 /*-------------------------------------------------------------------*/
1281 // returns status (negative) or length (positive)
1282 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1283 unsigned int pipe,
1284 struct usb_ctrlrequest *cmd, void *data,
1285 int len, int timeout)
1286 {
1287 struct urb *urb;
1288 int retv;
1289 int length = 0; /* shut up GCC */
1290
1291 urb = usb_alloc_urb(0, GFP_NOIO);
1292 if (!urb)
1293 return -ENOMEM;
1294
1295 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1296 len, usb_api_blocking_completion, NULL);
1297
1298 retv = usb_start_wait_urb(urb, timeout, &length);
1299 if (retv < 0) {
1300 return retv;
1301 }
1302 else {
1303 return length;
1304 }
1305 }
1306
1307
1308 /****************************************************************
1309 * kaweth_init
1310 ****************************************************************/
1311 static int __init kaweth_init(void)
1312 {
1313 dbg("Driver loading");
1314 return usb_register(&kaweth_driver);
1315 }
1316
1317 /****************************************************************
1318 * kaweth_exit
1319 ****************************************************************/
1320 static void __exit kaweth_exit(void)
1321 {
1322 usb_deregister(&kaweth_driver);
1323 }
1324
1325 module_init(kaweth_init);
1326 module_exit(kaweth_exit);
1327
1328
1329
1330
1331
1332
1333
1334
1335
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