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8
9#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11#include <linux/interrupt.h>
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/netdevice.h>
15#include <linux/etherdevice.h>
16#include <linux/ethtool.h>
17#include <linux/cache.h>
18#include <linux/crc32.h>
19#include <linux/mii.h>
20#include <linux/regulator/consumer.h>
21
22#include <linux/gpio.h>
23#include <linux/of_gpio.h>
24#include <linux/of_mdio.h>
25#include <linux/of_net.h>
26
27#include "ks8851.h"
28
29
30
31
32
33
34
35
36static void ks8851_lock(struct ks8851_net *ks, unsigned long *flags)
37{
38 ks->lock(ks, flags);
39}
40
41
42
43
44
45
46
47
48static void ks8851_unlock(struct ks8851_net *ks, unsigned long *flags)
49{
50 ks->unlock(ks, flags);
51}
52
53
54
55
56
57
58
59
60
61static void ks8851_wrreg16(struct ks8851_net *ks, unsigned int reg,
62 unsigned int val)
63{
64 ks->wrreg16(ks, reg, val);
65}
66
67
68
69
70
71
72
73
74static unsigned int ks8851_rdreg16(struct ks8851_net *ks,
75 unsigned int reg)
76{
77 return ks->rdreg16(ks, reg);
78}
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op)
94{
95 ks8851_wrreg16(ks, KS_GRR, op);
96 mdelay(1);
97 ks8851_wrreg16(ks, KS_GRR, 0);
98 mdelay(1);
99}
100
101
102
103
104
105
106
107
108static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode)
109{
110 unsigned pmecr;
111
112 netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode);
113
114 pmecr = ks8851_rdreg16(ks, KS_PMECR);
115 pmecr &= ~PMECR_PM_MASK;
116 pmecr |= pwrmode;
117
118 ks8851_wrreg16(ks, KS_PMECR, pmecr);
119}
120
121
122
123
124
125
126
127
128
129
130static int ks8851_write_mac_addr(struct net_device *dev)
131{
132 struct ks8851_net *ks = netdev_priv(dev);
133 unsigned long flags;
134 u16 val;
135 int i;
136
137 ks8851_lock(ks, &flags);
138
139
140
141
142
143 ks8851_set_powermode(ks, PMECR_PM_NORMAL);
144
145 for (i = 0; i < ETH_ALEN; i += 2) {
146 val = (dev->dev_addr[i] << 8) | dev->dev_addr[i + 1];
147 ks8851_wrreg16(ks, KS_MAR(i), val);
148 }
149
150 if (!netif_running(dev))
151 ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
152
153 ks8851_unlock(ks, &flags);
154
155 return 0;
156}
157
158
159
160
161
162
163
164static void ks8851_read_mac_addr(struct net_device *dev)
165{
166 struct ks8851_net *ks = netdev_priv(dev);
167 unsigned long flags;
168 u16 reg;
169 int i;
170
171 ks8851_lock(ks, &flags);
172
173 for (i = 0; i < ETH_ALEN; i += 2) {
174 reg = ks8851_rdreg16(ks, KS_MAR(i));
175 dev->dev_addr[i] = reg >> 8;
176 dev->dev_addr[i + 1] = reg & 0xff;
177 }
178
179 ks8851_unlock(ks, &flags);
180}
181
182
183
184
185
186
187
188
189
190
191
192
193static void ks8851_init_mac(struct ks8851_net *ks, struct device_node *np)
194{
195 struct net_device *dev = ks->netdev;
196 const u8 *mac_addr;
197
198 mac_addr = of_get_mac_address(np);
199 if (!IS_ERR(mac_addr)) {
200 ether_addr_copy(dev->dev_addr, mac_addr);
201 ks8851_write_mac_addr(dev);
202 return;
203 }
204
205 if (ks->rc_ccr & CCR_EEPROM) {
206 ks8851_read_mac_addr(dev);
207 if (is_valid_ether_addr(dev->dev_addr))
208 return;
209
210 netdev_err(ks->netdev, "invalid mac address read %pM\n",
211 dev->dev_addr);
212 }
213
214 eth_hw_addr_random(dev);
215 ks8851_write_mac_addr(dev);
216}
217
218
219
220
221
222
223
224
225static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt)
226{
227 netdev_dbg(ks->netdev,
228 "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n",
229 rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7],
230 rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11],
231 rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]);
232}
233
234
235
236
237
238
239static void ks8851_rx_skb(struct ks8851_net *ks, struct sk_buff *skb)
240{
241 ks->rx_skb(ks, skb);
242}
243
244
245
246
247
248
249
250
251
252static void ks8851_rx_pkts(struct ks8851_net *ks)
253{
254 struct sk_buff *skb;
255 unsigned rxfc;
256 unsigned rxlen;
257 unsigned rxstat;
258 u8 *rxpkt;
259
260 rxfc = (ks8851_rdreg16(ks, KS_RXFCTR) >> 8) & 0xff;
261
262 netif_dbg(ks, rx_status, ks->netdev,
263 "%s: %d packets\n", __func__, rxfc);
264
265
266
267
268
269
270
271
272
273
274
275 for (; rxfc != 0; rxfc--) {
276 rxstat = ks8851_rdreg16(ks, KS_RXFHSR);
277 rxlen = ks8851_rdreg16(ks, KS_RXFHBCR) & RXFHBCR_CNT_MASK;
278
279 netif_dbg(ks, rx_status, ks->netdev,
280 "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen);
281
282
283
284
285 ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00);
286
287
288 ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
289
290 if (rxlen > 4) {
291 unsigned int rxalign;
292
293 rxlen -= 4;
294 rxalign = ALIGN(rxlen, 4);
295 skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign);
296 if (skb) {
297
298
299
300
301
302
303
304 rxpkt = skb_put(skb, rxlen) - 8;
305
306 ks->rdfifo(ks, rxpkt, rxalign + 8);
307
308 if (netif_msg_pktdata(ks))
309 ks8851_dbg_dumpkkt(ks, rxpkt);
310
311 skb->protocol = eth_type_trans(skb, ks->netdev);
312 ks8851_rx_skb(ks, skb);
313
314 ks->netdev->stats.rx_packets++;
315 ks->netdev->stats.rx_bytes += rxlen;
316 }
317 }
318
319
320 ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_RRXEF);
321 }
322}
323
324
325
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331
332
333
334
335
336static irqreturn_t ks8851_irq(int irq, void *_ks)
337{
338 struct ks8851_net *ks = _ks;
339 unsigned handled = 0;
340 unsigned long flags;
341 unsigned int status;
342
343 ks8851_lock(ks, &flags);
344
345 status = ks8851_rdreg16(ks, KS_ISR);
346
347 netif_dbg(ks, intr, ks->netdev,
348 "%s: status 0x%04x\n", __func__, status);
349
350 if (status & IRQ_LCI)
351 handled |= IRQ_LCI;
352
353 if (status & IRQ_LDI) {
354 u16 pmecr = ks8851_rdreg16(ks, KS_PMECR);
355 pmecr &= ~PMECR_WKEVT_MASK;
356 ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK);
357
358 handled |= IRQ_LDI;
359 }
360
361 if (status & IRQ_RXPSI)
362 handled |= IRQ_RXPSI;
363
364 if (status & IRQ_TXI) {
365 handled |= IRQ_TXI;
366
367
368
369
370
371 ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR);
372
373 netif_dbg(ks, intr, ks->netdev,
374 "%s: txspace %d\n", __func__, ks->tx_space);
375 }
376
377 if (status & IRQ_RXI)
378 handled |= IRQ_RXI;
379
380 if (status & IRQ_SPIBEI) {
381 netdev_err(ks->netdev, "%s: spi bus error\n", __func__);
382 handled |= IRQ_SPIBEI;
383 }
384
385 ks8851_wrreg16(ks, KS_ISR, handled);
386
387 if (status & IRQ_RXI) {
388
389
390
391
392
393 ks8851_rx_pkts(ks);
394 }
395
396
397
398
399 if (status & IRQ_RXPSI) {
400 struct ks8851_rxctrl *rxc = &ks->rxctrl;
401
402
403 ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]);
404 ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]);
405 ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]);
406 ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]);
407
408 ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2);
409 ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1);
410 }
411
412 ks8851_unlock(ks, &flags);
413
414 if (status & IRQ_LCI)
415 mii_check_link(&ks->mii);
416
417 if (status & IRQ_TXI)
418 netif_wake_queue(ks->netdev);
419
420 return IRQ_HANDLED;
421}
422
423
424
425
426
427static void ks8851_flush_tx_work(struct ks8851_net *ks)
428{
429 if (ks->flush_tx_work)
430 ks->flush_tx_work(ks);
431}
432
433
434
435
436
437
438
439
440static int ks8851_net_open(struct net_device *dev)
441{
442 struct ks8851_net *ks = netdev_priv(dev);
443 unsigned long flags;
444 int ret;
445
446 ret = request_threaded_irq(dev->irq, NULL, ks8851_irq,
447 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
448 dev->name, ks);
449 if (ret < 0) {
450 netdev_err(dev, "failed to get irq\n");
451 return ret;
452 }
453
454
455
456 ks8851_lock(ks, &flags);
457
458 netif_dbg(ks, ifup, ks->netdev, "opening\n");
459
460
461 ks8851_set_powermode(ks, PMECR_PM_NORMAL);
462
463
464
465 ks8851_soft_reset(ks, GRR_QMU);
466
467
468
469 ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE |
470 TXCR_TXPE |
471 TXCR_TXCRC |
472 TXCR_TXFCE));
473
474
475 ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI);
476
477
478
479 ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA |
480 RXCR1_RXFCE |
481 RXCR1_RXBE |
482 RXCR1_RXUE |
483 RXCR1_RXE));
484
485
486 ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME);
487
488
489 ks8851_wrreg16(ks, KS_RXDTTR, 1000);
490 ks8851_wrreg16(ks, KS_RXDBCTR, 4096);
491 ks8851_wrreg16(ks, KS_RXFCTR, 10);
492
493 ks->rc_rxqcr = (RXQCR_RXFCTE |
494 RXQCR_RXDBCTE |
495 RXQCR_RXDTTE);
496
497 ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
498
499
500 ks8851_wrreg16(ks, KS_ISR, ks->rc_ier);
501 ks8851_wrreg16(ks, KS_IER, ks->rc_ier);
502
503 netif_start_queue(ks->netdev);
504
505 netif_dbg(ks, ifup, ks->netdev, "network device up\n");
506
507 ks8851_unlock(ks, &flags);
508 mii_check_link(&ks->mii);
509 return 0;
510}
511
512
513
514
515
516
517
518
519
520static int ks8851_net_stop(struct net_device *dev)
521{
522 struct ks8851_net *ks = netdev_priv(dev);
523 unsigned long flags;
524
525 netif_info(ks, ifdown, dev, "shutting down\n");
526
527 netif_stop_queue(dev);
528
529 ks8851_lock(ks, &flags);
530
531 ks8851_wrreg16(ks, KS_IER, 0x0000);
532 ks8851_wrreg16(ks, KS_ISR, 0xffff);
533 ks8851_unlock(ks, &flags);
534
535
536 ks8851_flush_tx_work(ks);
537 flush_work(&ks->rxctrl_work);
538
539 ks8851_lock(ks, &flags);
540
541 ks8851_wrreg16(ks, KS_RXCR1, 0x0000);
542
543
544 ks8851_wrreg16(ks, KS_TXCR, 0x0000);
545
546
547 ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
548 ks8851_unlock(ks, &flags);
549
550
551 while (!skb_queue_empty(&ks->txq)) {
552 struct sk_buff *txb = skb_dequeue(&ks->txq);
553
554 netif_dbg(ks, ifdown, ks->netdev,
555 "%s: freeing txb %p\n", __func__, txb);
556
557 dev_kfree_skb(txb);
558 }
559
560 free_irq(dev->irq, ks);
561
562 return 0;
563}
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb,
579 struct net_device *dev)
580{
581 struct ks8851_net *ks = netdev_priv(dev);
582
583 return ks->start_xmit(skb, dev);
584}
585
586
587
588
589
590
591
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593
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595
596
597
598
599static void ks8851_rxctrl_work(struct work_struct *work)
600{
601 struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work);
602 unsigned long flags;
603
604 ks8851_lock(ks, &flags);
605
606
607 ks8851_wrreg16(ks, KS_RXCR1, 0x00);
608
609 ks8851_unlock(ks, &flags);
610}
611
612static void ks8851_set_rx_mode(struct net_device *dev)
613{
614 struct ks8851_net *ks = netdev_priv(dev);
615 struct ks8851_rxctrl rxctrl;
616
617 memset(&rxctrl, 0, sizeof(rxctrl));
618
619 if (dev->flags & IFF_PROMISC) {
620
621
622 rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF;
623 } else if (dev->flags & IFF_ALLMULTI) {
624
625
626 rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE |
627 RXCR1_RXPAFMA | RXCR1_RXMAFMA);
628 } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) {
629 struct netdev_hw_addr *ha;
630 u32 crc;
631
632
633
634 netdev_for_each_mc_addr(ha, dev) {
635 crc = ether_crc(ETH_ALEN, ha->addr);
636 crc >>= (32 - 6);
637
638 rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf));
639 }
640
641 rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA;
642 } else {
643
644 rxctrl.rxcr1 = RXCR1_RXPAFMA;
645 }
646
647 rxctrl.rxcr1 |= (RXCR1_RXUE |
648 RXCR1_RXBE |
649 RXCR1_RXE |
650 RXCR1_RXFCE);
651
652 rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME;
653
654
655
656 spin_lock(&ks->statelock);
657
658 if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) {
659 memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl));
660 schedule_work(&ks->rxctrl_work);
661 }
662
663 spin_unlock(&ks->statelock);
664}
665
666static int ks8851_set_mac_address(struct net_device *dev, void *addr)
667{
668 struct sockaddr *sa = addr;
669
670 if (netif_running(dev))
671 return -EBUSY;
672
673 if (!is_valid_ether_addr(sa->sa_data))
674 return -EADDRNOTAVAIL;
675
676 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
677 return ks8851_write_mac_addr(dev);
678}
679
680static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
681{
682 struct ks8851_net *ks = netdev_priv(dev);
683
684 if (!netif_running(dev))
685 return -EINVAL;
686
687 return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL);
688}
689
690static const struct net_device_ops ks8851_netdev_ops = {
691 .ndo_open = ks8851_net_open,
692 .ndo_stop = ks8851_net_stop,
693 .ndo_do_ioctl = ks8851_net_ioctl,
694 .ndo_start_xmit = ks8851_start_xmit,
695 .ndo_set_mac_address = ks8851_set_mac_address,
696 .ndo_set_rx_mode = ks8851_set_rx_mode,
697 .ndo_validate_addr = eth_validate_addr,
698};
699
700
701
702static void ks8851_get_drvinfo(struct net_device *dev,
703 struct ethtool_drvinfo *di)
704{
705 strlcpy(di->driver, "KS8851", sizeof(di->driver));
706 strlcpy(di->version, "1.00", sizeof(di->version));
707 strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info));
708}
709
710static u32 ks8851_get_msglevel(struct net_device *dev)
711{
712 struct ks8851_net *ks = netdev_priv(dev);
713 return ks->msg_enable;
714}
715
716static void ks8851_set_msglevel(struct net_device *dev, u32 to)
717{
718 struct ks8851_net *ks = netdev_priv(dev);
719 ks->msg_enable = to;
720}
721
722static int ks8851_get_link_ksettings(struct net_device *dev,
723 struct ethtool_link_ksettings *cmd)
724{
725 struct ks8851_net *ks = netdev_priv(dev);
726
727 mii_ethtool_get_link_ksettings(&ks->mii, cmd);
728
729 return 0;
730}
731
732static int ks8851_set_link_ksettings(struct net_device *dev,
733 const struct ethtool_link_ksettings *cmd)
734{
735 struct ks8851_net *ks = netdev_priv(dev);
736 return mii_ethtool_set_link_ksettings(&ks->mii, cmd);
737}
738
739static u32 ks8851_get_link(struct net_device *dev)
740{
741 struct ks8851_net *ks = netdev_priv(dev);
742 return mii_link_ok(&ks->mii);
743}
744
745static int ks8851_nway_reset(struct net_device *dev)
746{
747 struct ks8851_net *ks = netdev_priv(dev);
748 return mii_nway_restart(&ks->mii);
749}
750
751
752
753static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee)
754{
755 struct ks8851_net *ks = ee->data;
756 unsigned val;
757
758 val = ks8851_rdreg16(ks, KS_EEPCR);
759
760 ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0;
761 ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0;
762 ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0;
763}
764
765static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee)
766{
767 struct ks8851_net *ks = ee->data;
768 unsigned val = EEPCR_EESA;
769
770 if (ee->drive_data)
771 val |= EEPCR_EESRWA;
772 if (ee->reg_data_in)
773 val |= EEPCR_EEDO;
774 if (ee->reg_data_clock)
775 val |= EEPCR_EESCK;
776 if (ee->reg_chip_select)
777 val |= EEPCR_EECS;
778
779 ks8851_wrreg16(ks, KS_EEPCR, val);
780}
781
782
783
784
785
786
787
788
789static int ks8851_eeprom_claim(struct ks8851_net *ks)
790{
791
792 ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS);
793 return 0;
794}
795
796
797
798
799
800
801
802static void ks8851_eeprom_release(struct ks8851_net *ks)
803{
804 unsigned val = ks8851_rdreg16(ks, KS_EEPCR);
805
806 ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA);
807}
808
809#define KS_EEPROM_MAGIC (0x00008851)
810
811static int ks8851_set_eeprom(struct net_device *dev,
812 struct ethtool_eeprom *ee, u8 *data)
813{
814 struct ks8851_net *ks = netdev_priv(dev);
815 int offset = ee->offset;
816 unsigned long flags;
817 int len = ee->len;
818 u16 tmp;
819
820
821 if (len != 1)
822 return -EINVAL;
823
824 if (ee->magic != KS_EEPROM_MAGIC)
825 return -EINVAL;
826
827 if (!(ks->rc_ccr & CCR_EEPROM))
828 return -ENOENT;
829
830 ks8851_lock(ks, &flags);
831
832 ks8851_eeprom_claim(ks);
833
834 eeprom_93cx6_wren(&ks->eeprom, true);
835
836
837
838
839 eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp);
840
841 if (offset & 1) {
842 tmp &= 0xff;
843 tmp |= *data << 8;
844 } else {
845 tmp &= 0xff00;
846 tmp |= *data;
847 }
848
849 eeprom_93cx6_write(&ks->eeprom, offset/2, tmp);
850 eeprom_93cx6_wren(&ks->eeprom, false);
851
852 ks8851_eeprom_release(ks);
853 ks8851_unlock(ks, &flags);
854
855 return 0;
856}
857
858static int ks8851_get_eeprom(struct net_device *dev,
859 struct ethtool_eeprom *ee, u8 *data)
860{
861 struct ks8851_net *ks = netdev_priv(dev);
862 int offset = ee->offset;
863 unsigned long flags;
864 int len = ee->len;
865
866
867 if (len & 1 || offset & 1)
868 return -EINVAL;
869
870 if (!(ks->rc_ccr & CCR_EEPROM))
871 return -ENOENT;
872
873 ks8851_lock(ks, &flags);
874
875 ks8851_eeprom_claim(ks);
876
877 ee->magic = KS_EEPROM_MAGIC;
878
879 eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2);
880 ks8851_eeprom_release(ks);
881 ks8851_unlock(ks, &flags);
882
883 return 0;
884}
885
886static int ks8851_get_eeprom_len(struct net_device *dev)
887{
888 struct ks8851_net *ks = netdev_priv(dev);
889
890
891 return ks->rc_ccr & CCR_EEPROM ? 128 : 0;
892}
893
894static const struct ethtool_ops ks8851_ethtool_ops = {
895 .get_drvinfo = ks8851_get_drvinfo,
896 .get_msglevel = ks8851_get_msglevel,
897 .set_msglevel = ks8851_set_msglevel,
898 .get_link = ks8851_get_link,
899 .nway_reset = ks8851_nway_reset,
900 .get_eeprom_len = ks8851_get_eeprom_len,
901 .get_eeprom = ks8851_get_eeprom,
902 .set_eeprom = ks8851_set_eeprom,
903 .get_link_ksettings = ks8851_get_link_ksettings,
904 .set_link_ksettings = ks8851_set_link_ksettings,
905};
906
907
908
909
910
911
912
913
914
915
916
917static int ks8851_phy_reg(int reg)
918{
919 switch (reg) {
920 case MII_BMCR:
921 return KS_P1MBCR;
922 case MII_BMSR:
923 return KS_P1MBSR;
924 case MII_PHYSID1:
925 return KS_PHY1ILR;
926 case MII_PHYSID2:
927 return KS_PHY1IHR;
928 case MII_ADVERTISE:
929 return KS_P1ANAR;
930 case MII_LPA:
931 return KS_P1ANLPR;
932 }
933
934 return -EOPNOTSUPP;
935}
936
937static int ks8851_phy_read_common(struct net_device *dev, int phy_addr, int reg)
938{
939 struct ks8851_net *ks = netdev_priv(dev);
940 unsigned long flags;
941 int result;
942 int ksreg;
943
944 ksreg = ks8851_phy_reg(reg);
945 if (ksreg < 0)
946 return ksreg;
947
948 ks8851_lock(ks, &flags);
949 result = ks8851_rdreg16(ks, ksreg);
950 ks8851_unlock(ks, &flags);
951
952 return result;
953}
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg)
971{
972 int ret;
973
974 ret = ks8851_phy_read_common(dev, phy_addr, reg);
975 if (ret < 0)
976 return 0x0;
977
978 return ret;
979}
980
981static void ks8851_phy_write(struct net_device *dev,
982 int phy, int reg, int value)
983{
984 struct ks8851_net *ks = netdev_priv(dev);
985 unsigned long flags;
986 int ksreg;
987
988 ksreg = ks8851_phy_reg(reg);
989 if (ksreg >= 0) {
990 ks8851_lock(ks, &flags);
991 ks8851_wrreg16(ks, ksreg, value);
992 ks8851_unlock(ks, &flags);
993 }
994}
995
996static int ks8851_mdio_read(struct mii_bus *bus, int phy_id, int reg)
997{
998 struct ks8851_net *ks = bus->priv;
999
1000 if (phy_id != 0)
1001 return -EOPNOTSUPP;
1002
1003
1004 if (reg == MII_PHYSID1)
1005 reg = MII_PHYSID2;
1006 else if (reg == MII_PHYSID2)
1007 reg = MII_PHYSID1;
1008
1009 return ks8851_phy_read_common(ks->netdev, phy_id, reg);
1010}
1011
1012static int ks8851_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
1013{
1014 struct ks8851_net *ks = bus->priv;
1015
1016 ks8851_phy_write(ks->netdev, phy_id, reg, val);
1017 return 0;
1018}
1019
1020
1021
1022
1023
1024
1025
1026static int ks8851_read_selftest(struct ks8851_net *ks)
1027{
1028 unsigned both_done = MBIR_TXMBF | MBIR_RXMBF;
1029 int ret = 0;
1030 unsigned rd;
1031
1032 rd = ks8851_rdreg16(ks, KS_MBIR);
1033
1034 if ((rd & both_done) != both_done) {
1035 netdev_warn(ks->netdev, "Memory selftest not finished\n");
1036 return 0;
1037 }
1038
1039 if (rd & MBIR_TXMBFA) {
1040 netdev_err(ks->netdev, "TX memory selftest fail\n");
1041 ret |= 1;
1042 }
1043
1044 if (rd & MBIR_RXMBFA) {
1045 netdev_err(ks->netdev, "RX memory selftest fail\n");
1046 ret |= 2;
1047 }
1048
1049 return 0;
1050}
1051
1052
1053
1054#ifdef CONFIG_PM_SLEEP
1055
1056int ks8851_suspend(struct device *dev)
1057{
1058 struct ks8851_net *ks = dev_get_drvdata(dev);
1059 struct net_device *netdev = ks->netdev;
1060
1061 if (netif_running(netdev)) {
1062 netif_device_detach(netdev);
1063 ks8851_net_stop(netdev);
1064 }
1065
1066 return 0;
1067}
1068
1069int ks8851_resume(struct device *dev)
1070{
1071 struct ks8851_net *ks = dev_get_drvdata(dev);
1072 struct net_device *netdev = ks->netdev;
1073
1074 if (netif_running(netdev)) {
1075 ks8851_net_open(netdev);
1076 netif_device_attach(netdev);
1077 }
1078
1079 return 0;
1080}
1081#endif
1082
1083static int ks8851_register_mdiobus(struct ks8851_net *ks, struct device *dev)
1084{
1085 struct mii_bus *mii_bus;
1086 int ret;
1087
1088 mii_bus = mdiobus_alloc();
1089 if (!mii_bus)
1090 return -ENOMEM;
1091
1092 mii_bus->name = "ks8851_eth_mii";
1093 mii_bus->read = ks8851_mdio_read;
1094 mii_bus->write = ks8851_mdio_write;
1095 mii_bus->priv = ks;
1096 mii_bus->parent = dev;
1097 mii_bus->phy_mask = ~((u32)BIT(0));
1098 snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
1099
1100 ret = mdiobus_register(mii_bus);
1101 if (ret)
1102 goto err_mdiobus_register;
1103
1104 ks->mii_bus = mii_bus;
1105
1106 return 0;
1107
1108err_mdiobus_register:
1109 mdiobus_free(mii_bus);
1110 return ret;
1111}
1112
1113static void ks8851_unregister_mdiobus(struct ks8851_net *ks)
1114{
1115 mdiobus_unregister(ks->mii_bus);
1116 mdiobus_free(ks->mii_bus);
1117}
1118
1119int ks8851_probe_common(struct net_device *netdev, struct device *dev,
1120 int msg_en)
1121{
1122 struct ks8851_net *ks = netdev_priv(netdev);
1123 unsigned cider;
1124 int gpio;
1125 int ret;
1126
1127 ks->netdev = netdev;
1128 ks->tx_space = 6144;
1129
1130 gpio = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, NULL);
1131 if (gpio == -EPROBE_DEFER)
1132 return gpio;
1133
1134 ks->gpio = gpio;
1135 if (gpio_is_valid(gpio)) {
1136 ret = devm_gpio_request_one(dev, gpio,
1137 GPIOF_OUT_INIT_LOW, "ks8851_rst_n");
1138 if (ret) {
1139 dev_err(dev, "reset gpio request failed\n");
1140 return ret;
1141 }
1142 }
1143
1144 ks->vdd_io = devm_regulator_get(dev, "vdd-io");
1145 if (IS_ERR(ks->vdd_io)) {
1146 ret = PTR_ERR(ks->vdd_io);
1147 goto err_reg_io;
1148 }
1149
1150 ret = regulator_enable(ks->vdd_io);
1151 if (ret) {
1152 dev_err(dev, "regulator vdd_io enable fail: %d\n", ret);
1153 goto err_reg_io;
1154 }
1155
1156 ks->vdd_reg = devm_regulator_get(dev, "vdd");
1157 if (IS_ERR(ks->vdd_reg)) {
1158 ret = PTR_ERR(ks->vdd_reg);
1159 goto err_reg;
1160 }
1161
1162 ret = regulator_enable(ks->vdd_reg);
1163 if (ret) {
1164 dev_err(dev, "regulator vdd enable fail: %d\n", ret);
1165 goto err_reg;
1166 }
1167
1168 if (gpio_is_valid(gpio)) {
1169 usleep_range(10000, 11000);
1170 gpio_set_value(gpio, 1);
1171 }
1172
1173 spin_lock_init(&ks->statelock);
1174
1175 INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work);
1176
1177 SET_NETDEV_DEV(netdev, dev);
1178
1179
1180 ks->eeprom.data = ks;
1181 ks->eeprom.width = PCI_EEPROM_WIDTH_93C46;
1182 ks->eeprom.register_read = ks8851_eeprom_regread;
1183 ks->eeprom.register_write = ks8851_eeprom_regwrite;
1184
1185
1186 ks->mii.dev = netdev;
1187 ks->mii.phy_id = 1;
1188 ks->mii.phy_id_mask = 1;
1189 ks->mii.reg_num_mask = 0xf;
1190 ks->mii.mdio_read = ks8851_phy_read;
1191 ks->mii.mdio_write = ks8851_phy_write;
1192
1193 dev_info(dev, "message enable is %d\n", msg_en);
1194
1195 ret = ks8851_register_mdiobus(ks, dev);
1196 if (ret)
1197 goto err_mdio;
1198
1199
1200 ks->msg_enable = netif_msg_init(msg_en, NETIF_MSG_DRV |
1201 NETIF_MSG_PROBE |
1202 NETIF_MSG_LINK);
1203
1204 skb_queue_head_init(&ks->txq);
1205
1206 netdev->ethtool_ops = &ks8851_ethtool_ops;
1207
1208 dev_set_drvdata(dev, ks);
1209
1210 netif_carrier_off(ks->netdev);
1211 netdev->if_port = IF_PORT_100BASET;
1212 netdev->netdev_ops = &ks8851_netdev_ops;
1213
1214
1215 ks8851_soft_reset(ks, GRR_GSR);
1216
1217
1218 cider = ks8851_rdreg16(ks, KS_CIDER);
1219 if ((cider & ~CIDER_REV_MASK) != CIDER_ID) {
1220 dev_err(dev, "failed to read device ID\n");
1221 ret = -ENODEV;
1222 goto err_id;
1223 }
1224
1225
1226 ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR);
1227
1228 ks8851_read_selftest(ks);
1229 ks8851_init_mac(ks, dev->of_node);
1230
1231 ret = register_netdev(netdev);
1232 if (ret) {
1233 dev_err(dev, "failed to register network device\n");
1234 goto err_id;
1235 }
1236
1237 netdev_info(netdev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n",
1238 CIDER_REV_GET(cider), netdev->dev_addr, netdev->irq,
1239 ks->rc_ccr & CCR_EEPROM ? "has" : "no");
1240
1241 return 0;
1242
1243err_id:
1244 ks8851_unregister_mdiobus(ks);
1245err_mdio:
1246 if (gpio_is_valid(gpio))
1247 gpio_set_value(gpio, 0);
1248 regulator_disable(ks->vdd_reg);
1249err_reg:
1250 regulator_disable(ks->vdd_io);
1251err_reg_io:
1252 return ret;
1253}
1254
1255int ks8851_remove_common(struct device *dev)
1256{
1257 struct ks8851_net *priv = dev_get_drvdata(dev);
1258
1259 ks8851_unregister_mdiobus(priv);
1260
1261 if (netif_msg_drv(priv))
1262 dev_info(dev, "remove\n");
1263
1264 unregister_netdev(priv->netdev);
1265 if (gpio_is_valid(priv->gpio))
1266 gpio_set_value(priv->gpio, 0);
1267 regulator_disable(priv->vdd_reg);
1268 regulator_disable(priv->vdd_io);
1269
1270 return 0;
1271}
1272