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USB: suspend/resume support for kaweth
[deliverable/linux.git] / drivers / usb / net / 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/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 #include "kawethfw.h"
69
70 #define KAWETH_MTU 1514
71 #define KAWETH_BUF_SIZE 1664
72 #define KAWETH_TX_TIMEOUT (5 * HZ)
73 #define KAWETH_SCRATCH_SIZE 32
74 #define KAWETH_FIRMWARE_BUF_SIZE 4096
75 #define KAWETH_CONTROL_TIMEOUT (30 * HZ)
76
77 #define KAWETH_STATUS_BROKEN 0x0000001
78 #define KAWETH_STATUS_CLOSING 0x0000002
79 #define KAWETH_STATUS_SUSPENDING 0x0000004
80
81 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
82
83 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
84 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
85 #define KAWETH_PACKET_FILTER_DIRECTED 0x04
86 #define KAWETH_PACKET_FILTER_BROADCAST 0x08
87 #define KAWETH_PACKET_FILTER_MULTICAST 0x10
88
89 /* Table 7 */
90 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
91 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
92 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
93 #define KAWETH_COMMAND_STATISTICS 0x03
94 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06
95 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07
96 #define KAWETH_COMMAND_SET_URB_SIZE 0x08
97 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
98 #define KAWETH_COMMAND_SCAN 0xFF
99
100 #define KAWETH_SOFS_TO_WAIT 0x05
101
102 #define INTBUFFERSIZE 4
103
104 #define STATE_OFFSET 0
105 #define STATE_MASK 0x40
106 #define STATE_SHIFT 5
107
108 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
109
110
111 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>");
112 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
113 MODULE_LICENSE("GPL");
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 };
183
184 typedef __u8 eth_addr_t[6];
185
186 /****************************************************************
187 * usb_eth_dev
188 ****************************************************************/
189 struct usb_eth_dev {
190 char *name;
191 __u16 vendor;
192 __u16 device;
193 void *pdata;
194 };
195
196 /****************************************************************
197 * kaweth_ethernet_configuration
198 * Refer Table 8
199 ****************************************************************/
200 struct kaweth_ethernet_configuration
201 {
202 __u8 size;
203 __u8 reserved1;
204 __u8 reserved2;
205 eth_addr_t hw_addr;
206 __u32 statistics_mask;
207 __le16 segment_size;
208 __u16 max_multicast_filters;
209 __u8 reserved3;
210 } __attribute__ ((packed));
211
212 /****************************************************************
213 * kaweth_device
214 ****************************************************************/
215 struct kaweth_device
216 {
217 spinlock_t device_lock;
218
219 __u32 status;
220 int end;
221 int suspend_lowmem_rx;
222 int suspend_lowmem_ctrl;
223 int linkstate;
224 int opened;
225 struct work_struct lowmem_work;
226
227 struct usb_device *dev;
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(void *d)
534 {
535 struct kaweth_device *kaweth = (struct kaweth_device *)d;
536
537 if (IS_BLOCKED(kaweth->status))
538 return;
539
540 if (kaweth->suspend_lowmem_rx)
541 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
542
543 if (kaweth->suspend_lowmem_ctrl)
544 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
545 }
546
547
548 /****************************************************************
549 * kaweth_resubmit_rx_urb
550 ****************************************************************/
551 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
552 gfp_t mem_flags)
553 {
554 int result;
555
556 usb_fill_bulk_urb(kaweth->rx_urb,
557 kaweth->dev,
558 usb_rcvbulkpipe(kaweth->dev, 1),
559 kaweth->rx_buf,
560 KAWETH_BUF_SIZE,
561 kaweth_usb_receive,
562 kaweth);
563 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
564 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
565
566 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
567 if (result == -ENOMEM) {
568 kaweth->suspend_lowmem_rx = 1;
569 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
570 }
571 err("resubmitting rx_urb %d failed", result);
572 } else {
573 kaweth->suspend_lowmem_rx = 0;
574 }
575
576 return result;
577 }
578
579 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
580
581 /****************************************************************
582 * kaweth_usb_receive
583 ****************************************************************/
584 static void kaweth_usb_receive(struct urb *urb)
585 {
586 struct kaweth_device *kaweth = urb->context;
587 struct net_device *net = kaweth->net;
588
589 int count = urb->actual_length;
590 int count2 = urb->transfer_buffer_length;
591
592 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
593
594 struct sk_buff *skb;
595
596 if(unlikely(urb->status == -ECONNRESET || urb->status == -ESHUTDOWN))
597 /* we are killed - set a flag and wake the disconnect handler */
598 {
599 kaweth->end = 1;
600 wake_up(&kaweth->term_wait);
601 return;
602 }
603
604 spin_lock(&kaweth->device_lock);
605 if (IS_BLOCKED(kaweth->status)) {
606 spin_unlock(&kaweth->device_lock);
607 return;
608 }
609 spin_unlock(&kaweth->device_lock);
610
611 if(urb->status && urb->status != -EREMOTEIO && count != 1) {
612 err("%s RX status: %d count: %d packet_len: %d",
613 net->name,
614 urb->status,
615 count,
616 (int)pkt_len);
617 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
618 return;
619 }
620
621 if(kaweth->net && (count > 2)) {
622 if(pkt_len > (count - 2)) {
623 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
624 err("Packet len & 2047: %x", pkt_len & 2047);
625 err("Count 2: %x", count2);
626 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
627 return;
628 }
629
630 if(!(skb = dev_alloc_skb(pkt_len+2))) {
631 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
632 return;
633 }
634
635 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
636
637 skb->dev = net;
638
639 eth_copy_and_sum(skb, kaweth->rx_buf + 2, pkt_len, 0);
640
641 skb_put(skb, pkt_len);
642
643 skb->protocol = eth_type_trans(skb, net);
644
645 netif_rx(skb);
646
647 kaweth->stats.rx_packets++;
648 kaweth->stats.rx_bytes += pkt_len;
649 }
650
651 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
652 }
653
654 /****************************************************************
655 * kaweth_open
656 ****************************************************************/
657 static int kaweth_open(struct net_device *net)
658 {
659 struct kaweth_device *kaweth = netdev_priv(net);
660 int res;
661
662 dbg("Opening network device.");
663
664 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
665 if (res)
666 return -EIO;
667
668 usb_fill_int_urb(
669 kaweth->irq_urb,
670 kaweth->dev,
671 usb_rcvintpipe(kaweth->dev, 3),
672 kaweth->intbuffer,
673 INTBUFFERSIZE,
674 int_callback,
675 kaweth,
676 250); /* overriding the descriptor */
677 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
678 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
679
680 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
681 if (res) {
682 usb_kill_urb(kaweth->rx_urb);
683 return -EIO;
684 }
685 kaweth->opened = 1;
686
687 netif_start_queue(net);
688
689 kaweth_async_set_rx_mode(kaweth);
690 return 0;
691 }
692
693 /****************************************************************
694 * kaweth_close
695 ****************************************************************/
696 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
697 {
698 usb_kill_urb(kaweth->irq_urb);
699 usb_kill_urb(kaweth->rx_urb);
700 usb_kill_urb(kaweth->tx_urb);
701
702 flush_scheduled_work();
703
704 /* a scheduled work may have resubmitted,
705 we hit them again */
706 usb_kill_urb(kaweth->irq_urb);
707 usb_kill_urb(kaweth->rx_urb);
708 }
709
710 /****************************************************************
711 * kaweth_close
712 ****************************************************************/
713 static int kaweth_close(struct net_device *net)
714 {
715 struct kaweth_device *kaweth = netdev_priv(net);
716
717 netif_stop_queue(net);
718 kaweth->opened = 0;
719
720 kaweth->status |= KAWETH_STATUS_CLOSING;
721
722 kaweth_kill_urbs(kaweth);
723
724 kaweth->status &= ~KAWETH_STATUS_CLOSING;
725
726 return 0;
727 }
728
729 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
730 {
731
732 strlcpy(info->driver, driver_name, sizeof(info->driver));
733 }
734
735 static struct ethtool_ops ops = {
736 .get_drvinfo = kaweth_get_drvinfo
737 };
738
739 /****************************************************************
740 * kaweth_usb_transmit_complete
741 ****************************************************************/
742 static void kaweth_usb_transmit_complete(struct urb *urb)
743 {
744 struct kaweth_device *kaweth = urb->context;
745 struct sk_buff *skb = kaweth->tx_skb;
746
747 if (unlikely(urb->status != 0))
748 if (urb->status != -ENOENT)
749 dbg("%s: TX status %d.", kaweth->net->name, urb->status);
750
751 netif_wake_queue(kaweth->net);
752 dev_kfree_skb_irq(skb);
753 }
754
755 /****************************************************************
756 * kaweth_start_xmit
757 ****************************************************************/
758 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net)
759 {
760 struct kaweth_device *kaweth = netdev_priv(net);
761 __le16 *private_header;
762
763 int res;
764
765 spin_lock(&kaweth->device_lock);
766
767 kaweth_async_set_rx_mode(kaweth);
768 netif_stop_queue(net);
769 if (IS_BLOCKED(kaweth->status)) {
770 goto skip;
771 }
772
773 /* We now decide whether we can put our special header into the sk_buff */
774 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
775 /* no such luck - we make our own */
776 struct sk_buff *copied_skb;
777 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
778 dev_kfree_skb_irq(skb);
779 skb = copied_skb;
780 if (!copied_skb) {
781 kaweth->stats.tx_errors++;
782 netif_start_queue(net);
783 spin_unlock(&kaweth->device_lock);
784 return 0;
785 }
786 }
787
788 private_header = (__le16 *)__skb_push(skb, 2);
789 *private_header = cpu_to_le16(skb->len-2);
790 kaweth->tx_skb = skb;
791
792 usb_fill_bulk_urb(kaweth->tx_urb,
793 kaweth->dev,
794 usb_sndbulkpipe(kaweth->dev, 2),
795 private_header,
796 skb->len,
797 kaweth_usb_transmit_complete,
798 kaweth);
799 kaweth->end = 0;
800
801 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
802 {
803 warn("kaweth failed tx_urb %d", res);
804 skip:
805 kaweth->stats.tx_errors++;
806
807 netif_start_queue(net);
808 dev_kfree_skb_irq(skb);
809 }
810 else
811 {
812 kaweth->stats.tx_packets++;
813 kaweth->stats.tx_bytes += skb->len;
814 net->trans_start = jiffies;
815 }
816
817 spin_unlock(&kaweth->device_lock);
818
819 return 0;
820 }
821
822 /****************************************************************
823 * kaweth_set_rx_mode
824 ****************************************************************/
825 static void kaweth_set_rx_mode(struct net_device *net)
826 {
827 struct kaweth_device *kaweth = netdev_priv(net);
828
829 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
830 KAWETH_PACKET_FILTER_BROADCAST |
831 KAWETH_PACKET_FILTER_MULTICAST;
832
833 dbg("Setting Rx mode to %d", packet_filter_bitmap);
834
835 netif_stop_queue(net);
836
837 if (net->flags & IFF_PROMISC) {
838 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
839 }
840 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
841 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
842 }
843
844 kaweth->packet_filter_bitmap = packet_filter_bitmap;
845 netif_wake_queue(net);
846 }
847
848 /****************************************************************
849 * kaweth_async_set_rx_mode
850 ****************************************************************/
851 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
852 {
853 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
854 kaweth->packet_filter_bitmap = 0;
855 if (packet_filter_bitmap == 0)
856 return;
857
858 {
859 int result;
860 result = kaweth_control(kaweth,
861 usb_sndctrlpipe(kaweth->dev, 0),
862 KAWETH_COMMAND_SET_PACKET_FILTER,
863 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
864 packet_filter_bitmap,
865 0,
866 (void *)&kaweth->scratch,
867 0,
868 KAWETH_CONTROL_TIMEOUT);
869
870 if(result < 0) {
871 err("Failed to set Rx mode: %d", result);
872 }
873 else {
874 dbg("Set Rx mode to %d", packet_filter_bitmap);
875 }
876 }
877 }
878
879 /****************************************************************
880 * kaweth_netdev_stats
881 ****************************************************************/
882 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
883 {
884 struct kaweth_device *kaweth = netdev_priv(dev);
885 return &kaweth->stats;
886 }
887
888 /****************************************************************
889 * kaweth_tx_timeout
890 ****************************************************************/
891 static void kaweth_tx_timeout(struct net_device *net)
892 {
893 struct kaweth_device *kaweth = netdev_priv(net);
894
895 warn("%s: Tx timed out. Resetting.", net->name);
896 kaweth->stats.tx_errors++;
897 net->trans_start = jiffies;
898
899 usb_unlink_urb(kaweth->tx_urb);
900 }
901
902 /****************************************************************
903 * kaweth_suspend
904 ****************************************************************/
905 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
906 {
907 struct kaweth_device *kaweth = usb_get_intfdata(intf);
908 unsigned long flags;
909
910 spin_lock_irqsave(&kaweth->device_lock, flags);
911 kaweth->status |= KAWETH_STATUS_SUSPENDING;
912 spin_unlock_irqrestore(&kaweth->device_lock, flags);
913
914 kaweth_kill_urbs(kaweth);
915 return 0;
916 }
917
918 /****************************************************************
919 * kaweth_resume
920 ****************************************************************/
921 static int kaweth_resume(struct usb_interface *intf)
922 {
923 struct kaweth_device *kaweth = usb_get_intfdata(intf);
924 unsigned long flags;
925
926 spin_lock_irqsave(&kaweth->device_lock, flags);
927 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
928 spin_unlock_irqrestore(&kaweth->device_lock, flags);
929
930 if (!kaweth->opened)
931 return 0;
932 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
933 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
934
935 return 0;
936 }
937
938 /****************************************************************
939 * kaweth_probe
940 ****************************************************************/
941 static int kaweth_probe(
942 struct usb_interface *intf,
943 const struct usb_device_id *id /* from id_table */
944 )
945 {
946 struct usb_device *dev = interface_to_usbdev(intf);
947 struct kaweth_device *kaweth;
948 struct net_device *netdev;
949 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
950 int result = 0;
951
952 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
953 dev->devnum,
954 le16_to_cpu(dev->descriptor.idVendor),
955 le16_to_cpu(dev->descriptor.idProduct),
956 le16_to_cpu(dev->descriptor.bcdDevice));
957
958 dbg("Device at %p", dev);
959
960 dbg("Descriptor length: %x type: %x",
961 (int)dev->descriptor.bLength,
962 (int)dev->descriptor.bDescriptorType);
963
964 netdev = alloc_etherdev(sizeof(*kaweth));
965 if (!netdev)
966 return -ENOMEM;
967
968 kaweth = netdev_priv(netdev);
969 kaweth->dev = dev;
970 kaweth->net = netdev;
971
972 spin_lock_init(&kaweth->device_lock);
973 init_waitqueue_head(&kaweth->term_wait);
974
975 dbg("Resetting.");
976
977 kaweth_reset(kaweth);
978
979 /*
980 * If high byte of bcdDevice is nonzero, firmware is already
981 * downloaded. Don't try to do it again, or we'll hang the device.
982 */
983
984 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
985 info("Firmware present in device.");
986 } else {
987 /* Download the firmware */
988 info("Downloading firmware...");
989 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
990 if ((result = kaweth_download_firmware(kaweth,
991 kaweth_new_code,
992 len_kaweth_new_code,
993 100,
994 2)) < 0) {
995 err("Error downloading firmware (%d)", result);
996 goto err_fw;
997 }
998
999 if ((result = kaweth_download_firmware(kaweth,
1000 kaweth_new_code_fix,
1001 len_kaweth_new_code_fix,
1002 100,
1003 3)) < 0) {
1004 err("Error downloading firmware fix (%d)", result);
1005 goto err_fw;
1006 }
1007
1008 if ((result = kaweth_download_firmware(kaweth,
1009 kaweth_trigger_code,
1010 len_kaweth_trigger_code,
1011 126,
1012 2)) < 0) {
1013 err("Error downloading trigger code (%d)", result);
1014 goto err_fw;
1015
1016 }
1017
1018 if ((result = kaweth_download_firmware(kaweth,
1019 kaweth_trigger_code_fix,
1020 len_kaweth_trigger_code_fix,
1021 126,
1022 3)) < 0) {
1023 err("Error downloading trigger code fix (%d)", result);
1024 goto err_fw;
1025 }
1026
1027
1028 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1029 err("Error triggering firmware (%d)", result);
1030 goto err_fw;
1031 }
1032
1033 /* Device will now disappear for a moment... */
1034 info("Firmware loaded. I'll be back...");
1035 err_fw:
1036 free_page((unsigned long)kaweth->firmware_buf);
1037 free_netdev(netdev);
1038 return -EIO;
1039 }
1040
1041 result = kaweth_read_configuration(kaweth);
1042
1043 if(result < 0) {
1044 err("Error reading configuration (%d), no net device created", result);
1045 goto err_free_netdev;
1046 }
1047
1048 info("Statistics collection: %x", kaweth->configuration.statistics_mask);
1049 info("Multicast filter limit: %x", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1050 info("MTU: %d", le16_to_cpu(kaweth->configuration.segment_size));
1051 info("Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
1052 (int)kaweth->configuration.hw_addr[0],
1053 (int)kaweth->configuration.hw_addr[1],
1054 (int)kaweth->configuration.hw_addr[2],
1055 (int)kaweth->configuration.hw_addr[3],
1056 (int)kaweth->configuration.hw_addr[4],
1057 (int)kaweth->configuration.hw_addr[5]);
1058
1059 if(!memcmp(&kaweth->configuration.hw_addr,
1060 &bcast_addr,
1061 sizeof(bcast_addr))) {
1062 err("Firmware not functioning properly, no net device created");
1063 goto err_free_netdev;
1064 }
1065
1066 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1067 dbg("Error setting URB size");
1068 goto err_free_netdev;
1069 }
1070
1071 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1072 err("Error setting SOFS wait");
1073 goto err_free_netdev;
1074 }
1075
1076 result = kaweth_set_receive_filter(kaweth,
1077 KAWETH_PACKET_FILTER_DIRECTED |
1078 KAWETH_PACKET_FILTER_BROADCAST |
1079 KAWETH_PACKET_FILTER_MULTICAST);
1080
1081 if(result < 0) {
1082 err("Error setting receive filter");
1083 goto err_free_netdev;
1084 }
1085
1086 dbg("Initializing net device.");
1087
1088 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1089 if (!kaweth->tx_urb)
1090 goto err_free_netdev;
1091 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1092 if (!kaweth->rx_urb)
1093 goto err_only_tx;
1094 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1095 if (!kaweth->irq_urb)
1096 goto err_tx_and_rx;
1097
1098 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev,
1099 INTBUFFERSIZE,
1100 GFP_KERNEL,
1101 &kaweth->intbufferhandle);
1102 if (!kaweth->intbuffer)
1103 goto err_tx_and_rx_and_irq;
1104 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev,
1105 KAWETH_BUF_SIZE,
1106 GFP_KERNEL,
1107 &kaweth->rxbufferhandle);
1108 if (!kaweth->rx_buf)
1109 goto err_all_but_rxbuf;
1110
1111 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1112 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1113 sizeof(kaweth->configuration.hw_addr));
1114
1115 netdev->open = kaweth_open;
1116 netdev->stop = kaweth_close;
1117
1118 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1119 netdev->tx_timeout = kaweth_tx_timeout;
1120
1121 netdev->hard_start_xmit = kaweth_start_xmit;
1122 netdev->set_multicast_list = kaweth_set_rx_mode;
1123 netdev->get_stats = kaweth_netdev_stats;
1124 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1125 SET_ETHTOOL_OPS(netdev, &ops);
1126
1127 /* kaweth is zeroed as part of alloc_netdev */
1128
1129 INIT_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl, (void *)kaweth);
1130
1131 SET_MODULE_OWNER(netdev);
1132
1133 usb_set_intfdata(intf, kaweth);
1134
1135 #if 0
1136 // dma_supported() is deeply broken on almost all architectures
1137 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1138 kaweth->net->features |= NETIF_F_HIGHDMA;
1139 #endif
1140
1141 SET_NETDEV_DEV(netdev, &intf->dev);
1142 if (register_netdev(netdev) != 0) {
1143 err("Error registering netdev.");
1144 goto err_intfdata;
1145 }
1146
1147 info("kaweth interface created at %s", kaweth->net->name);
1148
1149 dbg("Kaweth probe returning.");
1150
1151 return 0;
1152
1153 err_intfdata:
1154 usb_set_intfdata(intf, NULL);
1155 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1156 err_all_but_rxbuf:
1157 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1158 err_tx_and_rx_and_irq:
1159 usb_free_urb(kaweth->irq_urb);
1160 err_tx_and_rx:
1161 usb_free_urb(kaweth->rx_urb);
1162 err_only_tx:
1163 usb_free_urb(kaweth->tx_urb);
1164 err_free_netdev:
1165 free_netdev(netdev);
1166
1167 return -EIO;
1168 }
1169
1170 /****************************************************************
1171 * kaweth_disconnect
1172 ****************************************************************/
1173 static void kaweth_disconnect(struct usb_interface *intf)
1174 {
1175 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1176 struct net_device *netdev;
1177
1178 info("Unregistering");
1179
1180 usb_set_intfdata(intf, NULL);
1181 if (!kaweth) {
1182 warn("unregistering non-existant device");
1183 return;
1184 }
1185 netdev = kaweth->net;
1186
1187 dbg("Unregistering net device");
1188 unregister_netdev(netdev);
1189
1190 usb_free_urb(kaweth->rx_urb);
1191 usb_free_urb(kaweth->tx_urb);
1192 usb_free_urb(kaweth->irq_urb);
1193
1194 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1195 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1196
1197 free_netdev(netdev);
1198 }
1199
1200
1201 // FIXME this completion stuff is a modified clone of
1202 // an OLD version of some stuff in usb.c ...
1203 struct usb_api_data {
1204 wait_queue_head_t wqh;
1205 int done;
1206 };
1207
1208 /*-------------------------------------------------------------------*
1209 * completion handler for compatibility wrappers (sync control/bulk) *
1210 *-------------------------------------------------------------------*/
1211 static void usb_api_blocking_completion(struct urb *urb)
1212 {
1213 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1214
1215 awd->done=1;
1216 wake_up(&awd->wqh);
1217 }
1218
1219 /*-------------------------------------------------------------------*
1220 * COMPATIBILITY STUFF *
1221 *-------------------------------------------------------------------*/
1222
1223 // Starts urb and waits for completion or timeout
1224 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1225 {
1226 struct usb_api_data awd;
1227 int status;
1228
1229 init_waitqueue_head(&awd.wqh);
1230 awd.done = 0;
1231
1232 urb->context = &awd;
1233 status = usb_submit_urb(urb, GFP_NOIO);
1234 if (status) {
1235 // something went wrong
1236 usb_free_urb(urb);
1237 return status;
1238 }
1239
1240 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1241 // timeout
1242 warn("usb_control/bulk_msg: timeout");
1243 usb_kill_urb(urb); // remove urb safely
1244 status = -ETIMEDOUT;
1245 }
1246 else {
1247 status = urb->status;
1248 }
1249
1250 if (actual_length) {
1251 *actual_length = urb->actual_length;
1252 }
1253
1254 usb_free_urb(urb);
1255 return status;
1256 }
1257
1258 /*-------------------------------------------------------------------*/
1259 // returns status (negative) or length (positive)
1260 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1261 unsigned int pipe,
1262 struct usb_ctrlrequest *cmd, void *data,
1263 int len, int timeout)
1264 {
1265 struct urb *urb;
1266 int retv;
1267 int length;
1268
1269 urb = usb_alloc_urb(0, GFP_NOIO);
1270 if (!urb)
1271 return -ENOMEM;
1272
1273 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1274 len, usb_api_blocking_completion, NULL);
1275
1276 retv = usb_start_wait_urb(urb, timeout, &length);
1277 if (retv < 0) {
1278 return retv;
1279 }
1280 else {
1281 return length;
1282 }
1283 }
1284
1285
1286 /****************************************************************
1287 * kaweth_init
1288 ****************************************************************/
1289 static int __init kaweth_init(void)
1290 {
1291 dbg("Driver loading");
1292 return usb_register(&kaweth_driver);
1293 }
1294
1295 /****************************************************************
1296 * kaweth_exit
1297 ****************************************************************/
1298 static void __exit kaweth_exit(void)
1299 {
1300 usb_deregister(&kaweth_driver);
1301 }
1302
1303 module_init(kaweth_init);
1304 module_exit(kaweth_exit);
1305
1306
1307
1308
1309
1310
1311
1312
1313
Linux kernel - Deliverables
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