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34#include <linux/sched.h>
35#include <linux/slab.h>
36#include <linux/init.h>
37#include <linux/delay.h>
38#include <linux/netdevice.h>
39#include <linux/etherdevice.h>
40#include <linux/ethtool.h>
41#include <linux/mii.h>
42#include <linux/usb.h>
43#include <linux/module.h>
44#include <asm/byteorder.h>
45#include <linux/uaccess.h>
46#include "pegasus.h"
47
48
49
50
51#define DRIVER_VERSION "v0.9.3 (2013/04/25)"
52#define DRIVER_AUTHOR "Petko Manolov <petkan@nucleusys.com>"
53#define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
54
55static const char driver_name[] = "pegasus";
56
57#undef PEGASUS_WRITE_EEPROM
58#define BMSR_MEDIA (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
59 BMSR_100FULL | BMSR_ANEGCAPABLE)
60
61static bool loopback;
62static bool mii_mode;
63static char *devid;
64
65static struct usb_eth_dev usb_dev_id[] = {
66#define PEGASUS_DEV(pn, vid, pid, flags) \
67 {.name = pn, .vendor = vid, .device = pid, .private = flags},
68#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
69 PEGASUS_DEV(pn, vid, pid, flags)
70#include "pegasus.h"
71#undef PEGASUS_DEV
72#undef PEGASUS_DEV_CLASS
73 {NULL, 0, 0, 0},
74 {NULL, 0, 0, 0}
75};
76
77static struct usb_device_id pegasus_ids[] = {
78#define PEGASUS_DEV(pn, vid, pid, flags) \
79 {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
80
81
82
83
84
85
86#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
87 {.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \
88 .idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},
89#include "pegasus.h"
90#undef PEGASUS_DEV
91#undef PEGASUS_DEV_CLASS
92 {},
93 {}
94};
95
96MODULE_AUTHOR(DRIVER_AUTHOR);
97MODULE_DESCRIPTION(DRIVER_DESC);
98MODULE_LICENSE("GPL");
99module_param(loopback, bool, 0);
100module_param(mii_mode, bool, 0);
101module_param(devid, charp, 0);
102MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
103MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
104MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
105
106
107static int msg_level = -1;
108module_param(msg_level, int, 0);
109MODULE_PARM_DESC(msg_level, "Override default message level");
110
111MODULE_DEVICE_TABLE(usb, pegasus_ids);
112static const struct net_device_ops pegasus_netdev_ops;
113
114
115
116static void async_ctrl_callback(struct urb *urb)
117{
118 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
119 int status = urb->status;
120
121 if (status < 0)
122 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
123 kfree(req);
124 usb_free_urb(urb);
125}
126
127static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data)
128{
129 u8 *buf;
130 int ret;
131
132 buf = kmalloc(size, GFP_NOIO);
133 if (!buf)
134 return -ENOMEM;
135
136 ret = usb_control_msg(pegasus->usb, usb_rcvctrlpipe(pegasus->usb, 0),
137 PEGASUS_REQ_GET_REGS, PEGASUS_REQT_READ, 0,
138 indx, buf, size, 1000);
139 if (ret < 0)
140 netif_dbg(pegasus, drv, pegasus->net,
141 "%s returned %d\n", __func__, ret);
142 else if (ret <= size)
143 memcpy(data, buf, ret);
144 kfree(buf);
145 return ret;
146}
147
148static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
149 const void *data)
150{
151 u8 *buf;
152 int ret;
153
154 buf = kmemdup(data, size, GFP_NOIO);
155 if (!buf)
156 return -ENOMEM;
157
158 ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
159 PEGASUS_REQ_SET_REGS, PEGASUS_REQT_WRITE, 0,
160 indx, buf, size, 100);
161 if (ret < 0)
162 netif_dbg(pegasus, drv, pegasus->net,
163 "%s returned %d\n", __func__, ret);
164 kfree(buf);
165 return ret;
166}
167
168static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
169{
170 u8 *buf;
171 int ret;
172
173 buf = kmemdup(&data, 1, GFP_NOIO);
174 if (!buf)
175 return -ENOMEM;
176
177 ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
178 PEGASUS_REQ_SET_REG, PEGASUS_REQT_WRITE, data,
179 indx, buf, 1, 1000);
180 if (ret < 0)
181 netif_dbg(pegasus, drv, pegasus->net,
182 "%s returned %d\n", __func__, ret);
183 kfree(buf);
184 return ret;
185}
186
187static int update_eth_regs_async(pegasus_t *pegasus)
188{
189 int ret = -ENOMEM;
190 struct urb *async_urb;
191 struct usb_ctrlrequest *req;
192
193 req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
194 if (req == NULL)
195 return ret;
196
197 async_urb = usb_alloc_urb(0, GFP_ATOMIC);
198 if (async_urb == NULL) {
199 kfree(req);
200 return ret;
201 }
202 req->bRequestType = PEGASUS_REQT_WRITE;
203 req->bRequest = PEGASUS_REQ_SET_REGS;
204 req->wValue = cpu_to_le16(0);
205 req->wIndex = cpu_to_le16(EthCtrl0);
206 req->wLength = cpu_to_le16(3);
207
208 usb_fill_control_urb(async_urb, pegasus->usb,
209 usb_sndctrlpipe(pegasus->usb, 0), (void *)req,
210 pegasus->eth_regs, 3, async_ctrl_callback, req);
211
212 ret = usb_submit_urb(async_urb, GFP_ATOMIC);
213 if (ret) {
214 if (ret == -ENODEV)
215 netif_device_detach(pegasus->net);
216 netif_err(pegasus, drv, pegasus->net,
217 "%s returned %d\n", __func__, ret);
218 }
219 return ret;
220}
221
222static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd)
223{
224 int i;
225 __u8 data[4] = { phy, 0, 0, indx };
226 __le16 regdi;
227 int ret = -ETIMEDOUT;
228
229 if (cmd & PHY_WRITE) {
230 __le16 *t = (__le16 *) & data[1];
231 *t = cpu_to_le16(*regd);
232 }
233 set_register(p, PhyCtrl, 0);
234 set_registers(p, PhyAddr, sizeof(data), data);
235 set_register(p, PhyCtrl, (indx | cmd));
236 for (i = 0; i < REG_TIMEOUT; i++) {
237 ret = get_registers(p, PhyCtrl, 1, data);
238 if (ret < 0)
239 goto fail;
240 if (data[0] & PHY_DONE)
241 break;
242 }
243 if (i >= REG_TIMEOUT)
244 goto fail;
245 if (cmd & PHY_READ) {
246 ret = get_registers(p, PhyData, 2, ®di);
247 *regd = le16_to_cpu(regdi);
248 return ret;
249 }
250 return 0;
251fail:
252 netif_dbg(p, drv, p->net, "%s failed\n", __func__);
253 return ret;
254}
255
256
257static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
258{
259 return __mii_op(pegasus, phy, indx, regd, PHY_READ);
260}
261
262
263static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
264{
265 return __mii_op(pegasus, phy, indx, regd, PHY_WRITE);
266}
267
268static int mdio_read(struct net_device *dev, int phy_id, int loc)
269{
270 pegasus_t *pegasus = netdev_priv(dev);
271 u16 res;
272
273 read_mii_word(pegasus, phy_id, loc, &res);
274 return (int)res;
275}
276
277static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
278{
279 pegasus_t *pegasus = netdev_priv(dev);
280 u16 data = val;
281
282 write_mii_word(pegasus, phy_id, loc, &data);
283}
284
285static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
286{
287 int i;
288 __u8 tmp;
289 __le16 retdatai;
290 int ret;
291
292 set_register(pegasus, EpromCtrl, 0);
293 set_register(pegasus, EpromOffset, index);
294 set_register(pegasus, EpromCtrl, EPROM_READ);
295
296 for (i = 0; i < REG_TIMEOUT; i++) {
297 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
298 if (tmp & EPROM_DONE)
299 break;
300 if (ret == -ESHUTDOWN)
301 goto fail;
302 }
303 if (i >= REG_TIMEOUT)
304 goto fail;
305
306 ret = get_registers(pegasus, EpromData, 2, &retdatai);
307 *retdata = le16_to_cpu(retdatai);
308 return ret;
309
310fail:
311 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
312 return -ETIMEDOUT;
313}
314
315#ifdef PEGASUS_WRITE_EEPROM
316static inline void enable_eprom_write(pegasus_t *pegasus)
317{
318 __u8 tmp;
319
320 get_registers(pegasus, EthCtrl2, 1, &tmp);
321 set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
322}
323
324static inline void disable_eprom_write(pegasus_t *pegasus)
325{
326 __u8 tmp;
327
328 get_registers(pegasus, EthCtrl2, 1, &tmp);
329 set_register(pegasus, EpromCtrl, 0);
330 set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
331}
332
333static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
334{
335 int i;
336 __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
337 int ret;
338 __le16 le_data = cpu_to_le16(data);
339
340 set_registers(pegasus, EpromOffset, 4, d);
341 enable_eprom_write(pegasus);
342 set_register(pegasus, EpromOffset, index);
343 set_registers(pegasus, EpromData, 2, &le_data);
344 set_register(pegasus, EpromCtrl, EPROM_WRITE);
345
346 for (i = 0; i < REG_TIMEOUT; i++) {
347 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
348 if (ret == -ESHUTDOWN)
349 goto fail;
350 if (tmp & EPROM_DONE)
351 break;
352 }
353 disable_eprom_write(pegasus);
354 if (i >= REG_TIMEOUT)
355 goto fail;
356
357 return ret;
358
359fail:
360 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
361 return -ETIMEDOUT;
362}
363#endif
364
365static inline void get_node_id(pegasus_t *pegasus, __u8 *id)
366{
367 int i;
368 __u16 w16;
369
370 for (i = 0; i < 3; i++) {
371 read_eprom_word(pegasus, i, &w16);
372 ((__le16 *) id)[i] = cpu_to_le16(w16);
373 }
374}
375
376static void set_ethernet_addr(pegasus_t *pegasus)
377{
378 __u8 node_id[6];
379
380 if (pegasus->features & PEGASUS_II) {
381 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
382 } else {
383 get_node_id(pegasus, node_id);
384 set_registers(pegasus, EthID, sizeof(node_id), node_id);
385 }
386 memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id));
387}
388
389static inline int reset_mac(pegasus_t *pegasus)
390{
391 __u8 data = 0x8;
392 int i;
393
394 set_register(pegasus, EthCtrl1, data);
395 for (i = 0; i < REG_TIMEOUT; i++) {
396 get_registers(pegasus, EthCtrl1, 1, &data);
397 if (~data & 0x08) {
398 if (loopback)
399 break;
400 if (mii_mode && (pegasus->features & HAS_HOME_PNA))
401 set_register(pegasus, Gpio1, 0x34);
402 else
403 set_register(pegasus, Gpio1, 0x26);
404 set_register(pegasus, Gpio0, pegasus->features);
405 set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
406 break;
407 }
408 }
409 if (i == REG_TIMEOUT)
410 return -ETIMEDOUT;
411
412 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
413 usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
414 set_register(pegasus, Gpio0, 0x24);
415 set_register(pegasus, Gpio0, 0x26);
416 }
417 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
418 __u16 auxmode;
419 read_mii_word(pegasus, 3, 0x1b, &auxmode);
420 auxmode |= 4;
421 write_mii_word(pegasus, 3, 0x1b, &auxmode);
422 }
423
424 return 0;
425}
426
427static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
428{
429 __u16 linkpart;
430 __u8 data[4];
431 pegasus_t *pegasus = netdev_priv(dev);
432 int ret;
433
434 read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
435 data[0] = 0xc8;
436 data[1] = 0;
437 if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
438 data[1] |= 0x20;
439 if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
440 data[1] |= 0x10;
441 if (mii_mode)
442 data[1] = 0;
443 data[2] = loopback ? 0x09 : 0x01;
444
445 memcpy(pegasus->eth_regs, data, sizeof(data));
446 ret = set_registers(pegasus, EthCtrl0, 3, data);
447
448 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
449 usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
450 usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
451 u16 auxmode;
452 read_mii_word(pegasus, 0, 0x1b, &auxmode);
453 auxmode |= 4;
454 write_mii_word(pegasus, 0, 0x1b, &auxmode);
455 }
456
457 return ret;
458}
459
460static void read_bulk_callback(struct urb *urb)
461{
462 pegasus_t *pegasus = urb->context;
463 struct net_device *net;
464 int rx_status, count = urb->actual_length;
465 int status = urb->status;
466 u8 *buf = urb->transfer_buffer;
467 __u16 pkt_len;
468
469 if (!pegasus)
470 return;
471
472 net = pegasus->net;
473 if (!netif_device_present(net) || !netif_running(net))
474 return;
475
476 switch (status) {
477 case 0:
478 break;
479 case -ETIME:
480 netif_dbg(pegasus, rx_err, net, "reset MAC\n");
481 pegasus->flags &= ~PEGASUS_RX_BUSY;
482 break;
483 case -EPIPE:
484
485 netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
486 return;
487 case -ENOENT:
488 case -ECONNRESET:
489 case -ESHUTDOWN:
490 netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
491 return;
492 default:
493 netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
494 goto goon;
495 }
496
497 if (count < 4)
498 goto goon;
499
500 rx_status = buf[count - 2];
501 if (rx_status & 0x1e) {
502 netif_dbg(pegasus, rx_err, net,
503 "RX packet error %x\n", rx_status);
504 pegasus->stats.rx_errors++;
505 if (rx_status & 0x06)
506 pegasus->stats.rx_length_errors++;
507 if (rx_status & 0x08)
508 pegasus->stats.rx_crc_errors++;
509 if (rx_status & 0x10)
510 pegasus->stats.rx_frame_errors++;
511 goto goon;
512 }
513 if (pegasus->chip == 0x8513) {
514 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
515 pkt_len &= 0x0fff;
516 pegasus->rx_skb->data += 2;
517 } else {
518 pkt_len = buf[count - 3] << 8;
519 pkt_len += buf[count - 4];
520 pkt_len &= 0xfff;
521 pkt_len -= 4;
522 }
523
524
525
526
527
528 if (pkt_len > PEGASUS_MTU)
529 goto goon;
530
531
532
533
534
535 skb_put(pegasus->rx_skb, pkt_len);
536 pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
537 netif_rx(pegasus->rx_skb);
538 pegasus->stats.rx_packets++;
539 pegasus->stats.rx_bytes += pkt_len;
540
541 if (pegasus->flags & PEGASUS_UNPLUG)
542 return;
543
544 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,
545 GFP_ATOMIC);
546
547 if (pegasus->rx_skb == NULL)
548 goto tl_sched;
549goon:
550 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
551 usb_rcvbulkpipe(pegasus->usb, 1),
552 pegasus->rx_skb->data, PEGASUS_MTU,
553 read_bulk_callback, pegasus);
554 rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
555 if (rx_status == -ENODEV)
556 netif_device_detach(pegasus->net);
557 else if (rx_status) {
558 pegasus->flags |= PEGASUS_RX_URB_FAIL;
559 goto tl_sched;
560 } else {
561 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
562 }
563
564 return;
565
566tl_sched:
567 tasklet_schedule(&pegasus->rx_tl);
568}
569
570static void rx_fixup(unsigned long data)
571{
572 pegasus_t *pegasus;
573 int status;
574
575 pegasus = (pegasus_t *) data;
576 if (pegasus->flags & PEGASUS_UNPLUG)
577 return;
578
579 if (pegasus->flags & PEGASUS_RX_URB_FAIL)
580 if (pegasus->rx_skb)
581 goto try_again;
582 if (pegasus->rx_skb == NULL)
583 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
584 PEGASUS_MTU,
585 GFP_ATOMIC);
586 if (pegasus->rx_skb == NULL) {
587 netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
588 tasklet_schedule(&pegasus->rx_tl);
589 return;
590 }
591 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
592 usb_rcvbulkpipe(pegasus->usb, 1),
593 pegasus->rx_skb->data, PEGASUS_MTU,
594 read_bulk_callback, pegasus);
595try_again:
596 status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
597 if (status == -ENODEV)
598 netif_device_detach(pegasus->net);
599 else if (status) {
600 pegasus->flags |= PEGASUS_RX_URB_FAIL;
601 tasklet_schedule(&pegasus->rx_tl);
602 } else {
603 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
604 }
605}
606
607static void write_bulk_callback(struct urb *urb)
608{
609 pegasus_t *pegasus = urb->context;
610 struct net_device *net;
611 int status = urb->status;
612
613 if (!pegasus)
614 return;
615
616 net = pegasus->net;
617
618 if (!netif_device_present(net) || !netif_running(net))
619 return;
620
621 switch (status) {
622 case -EPIPE:
623
624 netif_stop_queue(net);
625 netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
626 return;
627 case -ENOENT:
628 case -ECONNRESET:
629 case -ESHUTDOWN:
630 netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
631 return;
632 default:
633 netif_info(pegasus, tx_err, net, "TX status %d\n", status);
634
635 case 0:
636 break;
637 }
638
639 netif_trans_update(net);
640 netif_wake_queue(net);
641}
642
643static void intr_callback(struct urb *urb)
644{
645 pegasus_t *pegasus = urb->context;
646 struct net_device *net;
647 int res, status = urb->status;
648
649 if (!pegasus)
650 return;
651 net = pegasus->net;
652
653 switch (status) {
654 case 0:
655 break;
656 case -ECONNRESET:
657 case -ENOENT:
658 case -ESHUTDOWN:
659 return;
660 default:
661
662
663
664 netif_dbg(pegasus, timer, net, "intr status %d\n", status);
665 }
666
667 if (urb->actual_length >= 6) {
668 u8 *d = urb->transfer_buffer;
669
670
671 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
672 |LATE_COL|JABBER_TIMEOUT)) {
673 pegasus->stats.tx_errors++;
674 if (d[0] & TX_UNDERRUN)
675 pegasus->stats.tx_fifo_errors++;
676 if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
677 pegasus->stats.tx_aborted_errors++;
678 if (d[0] & LATE_COL)
679 pegasus->stats.tx_window_errors++;
680 }
681
682
683
684
685
686
687
688 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
689 }
690
691 res = usb_submit_urb(urb, GFP_ATOMIC);
692 if (res == -ENODEV)
693 netif_device_detach(pegasus->net);
694 if (res)
695 netif_err(pegasus, timer, net,
696 "can't resubmit interrupt urb, %d\n", res);
697}
698
699static void pegasus_tx_timeout(struct net_device *net)
700{
701 pegasus_t *pegasus = netdev_priv(net);
702 netif_warn(pegasus, timer, net, "tx timeout\n");
703 usb_unlink_urb(pegasus->tx_urb);
704 pegasus->stats.tx_errors++;
705}
706
707static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
708 struct net_device *net)
709{
710 pegasus_t *pegasus = netdev_priv(net);
711 int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
712 int res;
713 __u16 l16 = skb->len;
714
715 netif_stop_queue(net);
716
717 ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
718 skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
719 usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
720 usb_sndbulkpipe(pegasus->usb, 2),
721 pegasus->tx_buff, count,
722 write_bulk_callback, pegasus);
723 if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
724 netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
725 switch (res) {
726 case -EPIPE:
727
728 break;
729 case -ENODEV:
730 case -EPERM:
731 netif_device_detach(pegasus->net);
732 break;
733 default:
734 pegasus->stats.tx_errors++;
735 netif_start_queue(net);
736 }
737 } else {
738 pegasus->stats.tx_packets++;
739 pegasus->stats.tx_bytes += skb->len;
740 }
741 dev_kfree_skb(skb);
742
743 return NETDEV_TX_OK;
744}
745
746static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
747{
748 return &((pegasus_t *) netdev_priv(dev))->stats;
749}
750
751static inline void disable_net_traffic(pegasus_t *pegasus)
752{
753 __le16 tmp = cpu_to_le16(0);
754
755 set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
756}
757
758static inline void get_interrupt_interval(pegasus_t *pegasus)
759{
760 u16 data;
761 u8 interval;
762
763 read_eprom_word(pegasus, 4, &data);
764 interval = data >> 8;
765 if (pegasus->usb->speed != USB_SPEED_HIGH) {
766 if (interval < 0x80) {
767 netif_info(pegasus, timer, pegasus->net,
768 "intr interval changed from %ums to %ums\n",
769 interval, 0x80);
770 interval = 0x80;
771 data = (data & 0x00FF) | ((u16)interval << 8);
772#ifdef PEGASUS_WRITE_EEPROM
773 write_eprom_word(pegasus, 4, data);
774#endif
775 }
776 }
777 pegasus->intr_interval = interval;
778}
779
780static void set_carrier(struct net_device *net)
781{
782 pegasus_t *pegasus = netdev_priv(net);
783 u16 tmp;
784
785 if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
786 return;
787
788 if (tmp & BMSR_LSTATUS)
789 netif_carrier_on(net);
790 else
791 netif_carrier_off(net);
792}
793
794static void free_all_urbs(pegasus_t *pegasus)
795{
796 usb_free_urb(pegasus->intr_urb);
797 usb_free_urb(pegasus->tx_urb);
798 usb_free_urb(pegasus->rx_urb);
799}
800
801static void unlink_all_urbs(pegasus_t *pegasus)
802{
803 usb_kill_urb(pegasus->intr_urb);
804 usb_kill_urb(pegasus->tx_urb);
805 usb_kill_urb(pegasus->rx_urb);
806}
807
808static int alloc_urbs(pegasus_t *pegasus)
809{
810 int res = -ENOMEM;
811
812 pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
813 if (!pegasus->rx_urb) {
814 return res;
815 }
816 pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
817 if (!pegasus->tx_urb) {
818 usb_free_urb(pegasus->rx_urb);
819 return res;
820 }
821 pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
822 if (!pegasus->intr_urb) {
823 usb_free_urb(pegasus->tx_urb);
824 usb_free_urb(pegasus->rx_urb);
825 return res;
826 }
827
828 return 0;
829}
830
831static int pegasus_open(struct net_device *net)
832{
833 pegasus_t *pegasus = netdev_priv(net);
834 int res=-ENOMEM;
835
836 if (pegasus->rx_skb == NULL)
837 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
838 PEGASUS_MTU,
839 GFP_KERNEL);
840 if (!pegasus->rx_skb)
841 goto exit;
842
843 res = set_registers(pegasus, EthID, 6, net->dev_addr);
844
845 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
846 usb_rcvbulkpipe(pegasus->usb, 1),
847 pegasus->rx_skb->data, PEGASUS_MTU,
848 read_bulk_callback, pegasus);
849 if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
850 if (res == -ENODEV)
851 netif_device_detach(pegasus->net);
852 netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
853 goto exit;
854 }
855
856 usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
857 usb_rcvintpipe(pegasus->usb, 3),
858 pegasus->intr_buff, sizeof(pegasus->intr_buff),
859 intr_callback, pegasus, pegasus->intr_interval);
860 if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
861 if (res == -ENODEV)
862 netif_device_detach(pegasus->net);
863 netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
864 usb_kill_urb(pegasus->rx_urb);
865 goto exit;
866 }
867 res = enable_net_traffic(net, pegasus->usb);
868 if (res < 0) {
869 netif_dbg(pegasus, ifup, net,
870 "can't enable_net_traffic() - %d\n", res);
871 res = -EIO;
872 usb_kill_urb(pegasus->rx_urb);
873 usb_kill_urb(pegasus->intr_urb);
874 goto exit;
875 }
876 set_carrier(net);
877 netif_start_queue(net);
878 netif_dbg(pegasus, ifup, net, "open\n");
879 res = 0;
880exit:
881 return res;
882}
883
884static int pegasus_close(struct net_device *net)
885{
886 pegasus_t *pegasus = netdev_priv(net);
887
888 netif_stop_queue(net);
889 if (!(pegasus->flags & PEGASUS_UNPLUG))
890 disable_net_traffic(pegasus);
891 tasklet_kill(&pegasus->rx_tl);
892 unlink_all_urbs(pegasus);
893
894 return 0;
895}
896
897static void pegasus_get_drvinfo(struct net_device *dev,
898 struct ethtool_drvinfo *info)
899{
900 pegasus_t *pegasus = netdev_priv(dev);
901
902 strlcpy(info->driver, driver_name, sizeof(info->driver));
903 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
904 usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
905}
906
907
908#define WOL_SUPPORTED (WAKE_MAGIC|WAKE_PHY)
909
910static void
911pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
912{
913 pegasus_t *pegasus = netdev_priv(dev);
914
915 wol->supported = WAKE_MAGIC | WAKE_PHY;
916 wol->wolopts = pegasus->wolopts;
917}
918
919static int
920pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
921{
922 pegasus_t *pegasus = netdev_priv(dev);
923 u8 reg78 = 0x04;
924 int ret;
925
926 if (wol->wolopts & ~WOL_SUPPORTED)
927 return -EINVAL;
928
929 if (wol->wolopts & WAKE_MAGIC)
930 reg78 |= 0x80;
931 if (wol->wolopts & WAKE_PHY)
932 reg78 |= 0x40;
933
934 if (wol->wolopts)
935 pegasus->eth_regs[0] |= 0x10;
936 else
937 pegasus->eth_regs[0] &= ~0x10;
938 pegasus->wolopts = wol->wolopts;
939
940 ret = set_register(pegasus, WakeupControl, reg78);
941 if (!ret)
942 ret = device_set_wakeup_enable(&pegasus->usb->dev,
943 wol->wolopts);
944 return ret;
945}
946
947static inline void pegasus_reset_wol(struct net_device *dev)
948{
949 struct ethtool_wolinfo wol;
950
951 memset(&wol, 0, sizeof wol);
952 (void) pegasus_set_wol(dev, &wol);
953}
954
955static int
956pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
957{
958 pegasus_t *pegasus;
959
960 pegasus = netdev_priv(dev);
961 mii_ethtool_gset(&pegasus->mii, ecmd);
962 return 0;
963}
964
965static int
966pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
967{
968 pegasus_t *pegasus = netdev_priv(dev);
969 return mii_ethtool_sset(&pegasus->mii, ecmd);
970}
971
972static int pegasus_nway_reset(struct net_device *dev)
973{
974 pegasus_t *pegasus = netdev_priv(dev);
975 return mii_nway_restart(&pegasus->mii);
976}
977
978static u32 pegasus_get_link(struct net_device *dev)
979{
980 pegasus_t *pegasus = netdev_priv(dev);
981 return mii_link_ok(&pegasus->mii);
982}
983
984static u32 pegasus_get_msglevel(struct net_device *dev)
985{
986 pegasus_t *pegasus = netdev_priv(dev);
987 return pegasus->msg_enable;
988}
989
990static void pegasus_set_msglevel(struct net_device *dev, u32 v)
991{
992 pegasus_t *pegasus = netdev_priv(dev);
993 pegasus->msg_enable = v;
994}
995
996static const struct ethtool_ops ops = {
997 .get_drvinfo = pegasus_get_drvinfo,
998 .get_settings = pegasus_get_settings,
999 .set_settings = pegasus_set_settings,
1000 .nway_reset = pegasus_nway_reset,
1001 .get_link = pegasus_get_link,
1002 .get_msglevel = pegasus_get_msglevel,
1003 .set_msglevel = pegasus_set_msglevel,
1004 .get_wol = pegasus_get_wol,
1005 .set_wol = pegasus_set_wol,
1006};
1007
1008static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1009{
1010 __u16 *data = (__u16 *) &rq->ifr_ifru;
1011 pegasus_t *pegasus = netdev_priv(net);
1012 int res;
1013
1014 switch (cmd) {
1015 case SIOCDEVPRIVATE:
1016 data[0] = pegasus->phy;
1017 case SIOCDEVPRIVATE + 1:
1018 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1019 res = 0;
1020 break;
1021 case SIOCDEVPRIVATE + 2:
1022 if (!capable(CAP_NET_ADMIN))
1023 return -EPERM;
1024 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, &data[2]);
1025 res = 0;
1026 break;
1027 default:
1028 res = -EOPNOTSUPP;
1029 }
1030 return res;
1031}
1032
1033static void pegasus_set_multicast(struct net_device *net)
1034{
1035 pegasus_t *pegasus = netdev_priv(net);
1036
1037 if (net->flags & IFF_PROMISC) {
1038 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1039 netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
1040 } else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1041 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1042 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1043 netif_dbg(pegasus, link, net, "set allmulti\n");
1044 } else {
1045 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1046 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1047 }
1048 update_eth_regs_async(pegasus);
1049}
1050
1051static __u8 mii_phy_probe(pegasus_t *pegasus)
1052{
1053 int i;
1054 __u16 tmp;
1055
1056 for (i = 0; i < 32; i++) {
1057 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1058 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1059 continue;
1060 else
1061 return i;
1062 }
1063
1064 return 0xff;
1065}
1066
1067static inline void setup_pegasus_II(pegasus_t *pegasus)
1068{
1069 __u8 data = 0xa5;
1070
1071 set_register(pegasus, Reg1d, 0);
1072 set_register(pegasus, Reg7b, 1);
1073 mdelay(100);
1074 if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1075 set_register(pegasus, Reg7b, 0);
1076 else
1077 set_register(pegasus, Reg7b, 2);
1078
1079 set_register(pegasus, 0x83, data);
1080 get_registers(pegasus, 0x83, 1, &data);
1081
1082 if (data == 0xa5)
1083 pegasus->chip = 0x8513;
1084 else
1085 pegasus->chip = 0;
1086
1087 set_register(pegasus, 0x80, 0xc0);
1088 set_register(pegasus, 0x83, 0xff);
1089 set_register(pegasus, 0x84, 0x01);
1090
1091 if (pegasus->features & HAS_HOME_PNA && mii_mode)
1092 set_register(pegasus, Reg81, 6);
1093 else
1094 set_register(pegasus, Reg81, 2);
1095}
1096
1097
1098static int pegasus_count;
1099static struct workqueue_struct *pegasus_workqueue;
1100#define CARRIER_CHECK_DELAY (2 * HZ)
1101
1102static void check_carrier(struct work_struct *work)
1103{
1104 pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1105 set_carrier(pegasus->net);
1106 if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1107 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1108 CARRIER_CHECK_DELAY);
1109 }
1110}
1111
1112static int pegasus_blacklisted(struct usb_device *udev)
1113{
1114 struct usb_device_descriptor *udd = &udev->descriptor;
1115
1116
1117
1118
1119 if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1120 (udd->idProduct == cpu_to_le16(0x0121)) &&
1121 (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1122 (udd->bDeviceProtocol == 1))
1123 return 1;
1124
1125 return 0;
1126}
1127
1128
1129
1130
1131static void pegasus_dec_workqueue(void)
1132{
1133 pegasus_count--;
1134 if (pegasus_count == 0) {
1135 destroy_workqueue(pegasus_workqueue);
1136 pegasus_workqueue = NULL;
1137 }
1138}
1139
1140static int pegasus_probe(struct usb_interface *intf,
1141 const struct usb_device_id *id)
1142{
1143 struct usb_device *dev = interface_to_usbdev(intf);
1144 struct net_device *net;
1145 pegasus_t *pegasus;
1146 int dev_index = id - pegasus_ids;
1147 int res = -ENOMEM;
1148
1149 if (pegasus_blacklisted(dev))
1150 return -ENODEV;
1151
1152 if (pegasus_count == 0) {
1153 pegasus_workqueue = alloc_workqueue("pegasus", WQ_MEM_RECLAIM,
1154 0);
1155 if (!pegasus_workqueue)
1156 return -ENOMEM;
1157 }
1158 pegasus_count++;
1159
1160 net = alloc_etherdev(sizeof(struct pegasus));
1161 if (!net)
1162 goto out;
1163
1164 pegasus = netdev_priv(net);
1165 pegasus->dev_index = dev_index;
1166
1167 res = alloc_urbs(pegasus);
1168 if (res < 0) {
1169 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1170 goto out1;
1171 }
1172
1173 tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1174
1175 INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1176
1177 pegasus->intf = intf;
1178 pegasus->usb = dev;
1179 pegasus->net = net;
1180
1181
1182 net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1183 net->netdev_ops = &pegasus_netdev_ops;
1184 net->ethtool_ops = &ops;
1185 pegasus->mii.dev = net;
1186 pegasus->mii.mdio_read = mdio_read;
1187 pegasus->mii.mdio_write = mdio_write;
1188 pegasus->mii.phy_id_mask = 0x1f;
1189 pegasus->mii.reg_num_mask = 0x1f;
1190 pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1191 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1192
1193 pegasus->features = usb_dev_id[dev_index].private;
1194 get_interrupt_interval(pegasus);
1195 if (reset_mac(pegasus)) {
1196 dev_err(&intf->dev, "can't reset MAC\n");
1197 res = -EIO;
1198 goto out2;
1199 }
1200 set_ethernet_addr(pegasus);
1201 if (pegasus->features & PEGASUS_II) {
1202 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1203 setup_pegasus_II(pegasus);
1204 }
1205 pegasus->phy = mii_phy_probe(pegasus);
1206 if (pegasus->phy == 0xff) {
1207 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1208 pegasus->phy = 1;
1209 }
1210 pegasus->mii.phy_id = pegasus->phy;
1211 usb_set_intfdata(intf, pegasus);
1212 SET_NETDEV_DEV(net, &intf->dev);
1213 pegasus_reset_wol(net);
1214 res = register_netdev(net);
1215 if (res)
1216 goto out3;
1217 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1218 CARRIER_CHECK_DELAY);
1219 dev_info(&intf->dev, "%s, %s, %pM\n", net->name,
1220 usb_dev_id[dev_index].name, net->dev_addr);
1221 return 0;
1222
1223out3:
1224 usb_set_intfdata(intf, NULL);
1225out2:
1226 free_all_urbs(pegasus);
1227out1:
1228 free_netdev(net);
1229out:
1230 pegasus_dec_workqueue();
1231 return res;
1232}
1233
1234static void pegasus_disconnect(struct usb_interface *intf)
1235{
1236 struct pegasus *pegasus = usb_get_intfdata(intf);
1237
1238 usb_set_intfdata(intf, NULL);
1239 if (!pegasus) {
1240 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1241 return;
1242 }
1243
1244 pegasus->flags |= PEGASUS_UNPLUG;
1245 cancel_delayed_work(&pegasus->carrier_check);
1246 unregister_netdev(pegasus->net);
1247 unlink_all_urbs(pegasus);
1248 free_all_urbs(pegasus);
1249 if (pegasus->rx_skb != NULL) {
1250 dev_kfree_skb(pegasus->rx_skb);
1251 pegasus->rx_skb = NULL;
1252 }
1253 free_netdev(pegasus->net);
1254 pegasus_dec_workqueue();
1255}
1256
1257static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1258{
1259 struct pegasus *pegasus = usb_get_intfdata(intf);
1260
1261 netif_device_detach(pegasus->net);
1262 cancel_delayed_work(&pegasus->carrier_check);
1263 if (netif_running(pegasus->net)) {
1264 usb_kill_urb(pegasus->rx_urb);
1265 usb_kill_urb(pegasus->intr_urb);
1266 }
1267 return 0;
1268}
1269
1270static int pegasus_resume(struct usb_interface *intf)
1271{
1272 struct pegasus *pegasus = usb_get_intfdata(intf);
1273
1274 netif_device_attach(pegasus->net);
1275 if (netif_running(pegasus->net)) {
1276 pegasus->rx_urb->status = 0;
1277 pegasus->rx_urb->actual_length = 0;
1278 read_bulk_callback(pegasus->rx_urb);
1279
1280 pegasus->intr_urb->status = 0;
1281 pegasus->intr_urb->actual_length = 0;
1282 intr_callback(pegasus->intr_urb);
1283 }
1284 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1285 CARRIER_CHECK_DELAY);
1286 return 0;
1287}
1288
1289static const struct net_device_ops pegasus_netdev_ops = {
1290 .ndo_open = pegasus_open,
1291 .ndo_stop = pegasus_close,
1292 .ndo_do_ioctl = pegasus_ioctl,
1293 .ndo_start_xmit = pegasus_start_xmit,
1294 .ndo_set_rx_mode = pegasus_set_multicast,
1295 .ndo_get_stats = pegasus_netdev_stats,
1296 .ndo_tx_timeout = pegasus_tx_timeout,
1297 .ndo_set_mac_address = eth_mac_addr,
1298 .ndo_validate_addr = eth_validate_addr,
1299};
1300
1301static struct usb_driver pegasus_driver = {
1302 .name = driver_name,
1303 .probe = pegasus_probe,
1304 .disconnect = pegasus_disconnect,
1305 .id_table = pegasus_ids,
1306 .suspend = pegasus_suspend,
1307 .resume = pegasus_resume,
1308 .disable_hub_initiated_lpm = 1,
1309};
1310
1311static void __init parse_id(char *id)
1312{
1313 unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1314 char *token, *name = NULL;
1315
1316 if ((token = strsep(&id, ":")) != NULL)
1317 name = token;
1318
1319 if ((token = strsep(&id, ":")) != NULL)
1320 vendor_id = simple_strtoul(token, NULL, 16);
1321 if ((token = strsep(&id, ":")) != NULL)
1322 device_id = simple_strtoul(token, NULL, 16);
1323 flags = simple_strtoul(id, NULL, 16);
1324 pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1325 driver_name, name, vendor_id, device_id, flags);
1326
1327 if (vendor_id > 0x10000 || vendor_id == 0)
1328 return;
1329 if (device_id > 0x10000 || device_id == 0)
1330 return;
1331
1332 for (i = 0; usb_dev_id[i].name; i++);
1333 usb_dev_id[i].name = name;
1334 usb_dev_id[i].vendor = vendor_id;
1335 usb_dev_id[i].device = device_id;
1336 usb_dev_id[i].private = flags;
1337 pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1338 pegasus_ids[i].idVendor = vendor_id;
1339 pegasus_ids[i].idProduct = device_id;
1340}
1341
1342static int __init pegasus_init(void)
1343{
1344 pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1345 if (devid)
1346 parse_id(devid);
1347 return usb_register(&pegasus_driver);
1348}
1349
1350static void __exit pegasus_exit(void)
1351{
1352 usb_deregister(&pegasus_driver);
1353}
1354
1355module_init(pegasus_init);
1356module_exit(pegasus_exit);
1357
