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