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22#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24#include <linux/dma-mapping.h>
25#include <linux/etherdevice.h>
26#include <linux/ethtool.h>
27#include <linux/init.h>
28#include <linux/interrupt.h>
29#include <linux/io.h>
30#include <linux/module.h>
31#include <linux/netdevice.h>
32#include <linux/phy.h>
33#include <linux/platform_device.h>
34#include <net/ip.h>
35
36#include "ftgmac100.h"
37
38#define DRV_NAME "ftgmac100"
39#define DRV_VERSION "0.7"
40
41#define RX_QUEUE_ENTRIES 256
42#define TX_QUEUE_ENTRIES 512
43
44#define MAX_PKT_SIZE 1518
45#define RX_BUF_SIZE PAGE_SIZE
46
47
48
49
50struct ftgmac100_descs {
51 struct ftgmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
52 struct ftgmac100_txdes txdes[TX_QUEUE_ENTRIES];
53};
54
55struct ftgmac100 {
56 struct resource *res;
57 void __iomem *base;
58 int irq;
59
60 struct ftgmac100_descs *descs;
61 dma_addr_t descs_dma_addr;
62
63 unsigned int rx_pointer;
64 unsigned int tx_clean_pointer;
65 unsigned int tx_pointer;
66 unsigned int tx_pending;
67
68 spinlock_t tx_lock;
69
70 struct net_device *netdev;
71 struct device *dev;
72 struct napi_struct napi;
73
74 struct mii_bus *mii_bus;
75 int phy_irq[PHY_MAX_ADDR];
76 struct phy_device *phydev;
77 int old_speed;
78};
79
80static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
81 struct ftgmac100_rxdes *rxdes, gfp_t gfp);
82
83
84
85
86#define INT_MASK_ALL_ENABLED (FTGMAC100_INT_RPKT_LOST | \
87 FTGMAC100_INT_XPKT_ETH | \
88 FTGMAC100_INT_XPKT_LOST | \
89 FTGMAC100_INT_AHB_ERR | \
90 FTGMAC100_INT_PHYSTS_CHG | \
91 FTGMAC100_INT_RPKT_BUF | \
92 FTGMAC100_INT_NO_RXBUF)
93
94static void ftgmac100_set_rx_ring_base(struct ftgmac100 *priv, dma_addr_t addr)
95{
96 iowrite32(addr, priv->base + FTGMAC100_OFFSET_RXR_BADR);
97}
98
99static void ftgmac100_set_rx_buffer_size(struct ftgmac100 *priv,
100 unsigned int size)
101{
102 size = FTGMAC100_RBSR_SIZE(size);
103 iowrite32(size, priv->base + FTGMAC100_OFFSET_RBSR);
104}
105
106static void ftgmac100_set_normal_prio_tx_ring_base(struct ftgmac100 *priv,
107 dma_addr_t addr)
108{
109 iowrite32(addr, priv->base + FTGMAC100_OFFSET_NPTXR_BADR);
110}
111
112static void ftgmac100_txdma_normal_prio_start_polling(struct ftgmac100 *priv)
113{
114 iowrite32(1, priv->base + FTGMAC100_OFFSET_NPTXPD);
115}
116
117static int ftgmac100_reset_hw(struct ftgmac100 *priv)
118{
119 struct net_device *netdev = priv->netdev;
120 int i;
121
122
123 iowrite32(FTGMAC100_MACCR_SW_RST, priv->base + FTGMAC100_OFFSET_MACCR);
124 for (i = 0; i < 5; i++) {
125 unsigned int maccr;
126
127 maccr = ioread32(priv->base + FTGMAC100_OFFSET_MACCR);
128 if (!(maccr & FTGMAC100_MACCR_SW_RST))
129 return 0;
130
131 udelay(1000);
132 }
133
134 netdev_err(netdev, "software reset failed\n");
135 return -EIO;
136}
137
138static void ftgmac100_set_mac(struct ftgmac100 *priv, const unsigned char *mac)
139{
140 unsigned int maddr = mac[0] << 8 | mac[1];
141 unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
142
143 iowrite32(maddr, priv->base + FTGMAC100_OFFSET_MAC_MADR);
144 iowrite32(laddr, priv->base + FTGMAC100_OFFSET_MAC_LADR);
145}
146
147static void ftgmac100_init_hw(struct ftgmac100 *priv)
148{
149
150 ftgmac100_set_rx_ring_base(priv,
151 priv->descs_dma_addr +
152 offsetof(struct ftgmac100_descs, rxdes));
153 ftgmac100_set_normal_prio_tx_ring_base(priv,
154 priv->descs_dma_addr +
155 offsetof(struct ftgmac100_descs, txdes));
156
157 ftgmac100_set_rx_buffer_size(priv, RX_BUF_SIZE);
158
159 iowrite32(FTGMAC100_APTC_RXPOLL_CNT(1), priv->base + FTGMAC100_OFFSET_APTC);
160
161 ftgmac100_set_mac(priv, priv->netdev->dev_addr);
162}
163
164#define MACCR_ENABLE_ALL (FTGMAC100_MACCR_TXDMA_EN | \
165 FTGMAC100_MACCR_RXDMA_EN | \
166 FTGMAC100_MACCR_TXMAC_EN | \
167 FTGMAC100_MACCR_RXMAC_EN | \
168 FTGMAC100_MACCR_FULLDUP | \
169 FTGMAC100_MACCR_CRC_APD | \
170 FTGMAC100_MACCR_RX_RUNT | \
171 FTGMAC100_MACCR_RX_BROADPKT)
172
173static void ftgmac100_start_hw(struct ftgmac100 *priv, int speed)
174{
175 int maccr = MACCR_ENABLE_ALL;
176
177 switch (speed) {
178 default:
179 case 10:
180 break;
181
182 case 100:
183 maccr |= FTGMAC100_MACCR_FAST_MODE;
184 break;
185
186 case 1000:
187 maccr |= FTGMAC100_MACCR_GIGA_MODE;
188 break;
189 }
190
191 iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR);
192}
193
194static void ftgmac100_stop_hw(struct ftgmac100 *priv)
195{
196 iowrite32(0, priv->base + FTGMAC100_OFFSET_MACCR);
197}
198
199
200
201
202static bool ftgmac100_rxdes_first_segment(struct ftgmac100_rxdes *rxdes)
203{
204 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FRS);
205}
206
207static bool ftgmac100_rxdes_last_segment(struct ftgmac100_rxdes *rxdes)
208{
209 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_LRS);
210}
211
212static bool ftgmac100_rxdes_packet_ready(struct ftgmac100_rxdes *rxdes)
213{
214 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RXPKT_RDY);
215}
216
217static void ftgmac100_rxdes_set_dma_own(struct ftgmac100_rxdes *rxdes)
218{
219
220 rxdes->rxdes0 &= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
221}
222
223static bool ftgmac100_rxdes_rx_error(struct ftgmac100_rxdes *rxdes)
224{
225 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ERR);
226}
227
228static bool ftgmac100_rxdes_crc_error(struct ftgmac100_rxdes *rxdes)
229{
230 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_CRC_ERR);
231}
232
233static bool ftgmac100_rxdes_frame_too_long(struct ftgmac100_rxdes *rxdes)
234{
235 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FTL);
236}
237
238static bool ftgmac100_rxdes_runt(struct ftgmac100_rxdes *rxdes)
239{
240 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RUNT);
241}
242
243static bool ftgmac100_rxdes_odd_nibble(struct ftgmac100_rxdes *rxdes)
244{
245 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ODD_NB);
246}
247
248static unsigned int ftgmac100_rxdes_data_length(struct ftgmac100_rxdes *rxdes)
249{
250 return le32_to_cpu(rxdes->rxdes0) & FTGMAC100_RXDES0_VDBC;
251}
252
253static bool ftgmac100_rxdes_multicast(struct ftgmac100_rxdes *rxdes)
254{
255 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_MULTICAST);
256}
257
258static void ftgmac100_rxdes_set_end_of_ring(struct ftgmac100_rxdes *rxdes)
259{
260 rxdes->rxdes0 |= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
261}
262
263static void ftgmac100_rxdes_set_dma_addr(struct ftgmac100_rxdes *rxdes,
264 dma_addr_t addr)
265{
266 rxdes->rxdes3 = cpu_to_le32(addr);
267}
268
269static dma_addr_t ftgmac100_rxdes_get_dma_addr(struct ftgmac100_rxdes *rxdes)
270{
271 return le32_to_cpu(rxdes->rxdes3);
272}
273
274static bool ftgmac100_rxdes_is_tcp(struct ftgmac100_rxdes *rxdes)
275{
276 return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
277 cpu_to_le32(FTGMAC100_RXDES1_PROT_TCPIP);
278}
279
280static bool ftgmac100_rxdes_is_udp(struct ftgmac100_rxdes *rxdes)
281{
282 return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
283 cpu_to_le32(FTGMAC100_RXDES1_PROT_UDPIP);
284}
285
286static bool ftgmac100_rxdes_tcpcs_err(struct ftgmac100_rxdes *rxdes)
287{
288 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_TCP_CHKSUM_ERR);
289}
290
291static bool ftgmac100_rxdes_udpcs_err(struct ftgmac100_rxdes *rxdes)
292{
293 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_UDP_CHKSUM_ERR);
294}
295
296static bool ftgmac100_rxdes_ipcs_err(struct ftgmac100_rxdes *rxdes)
297{
298 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_IP_CHKSUM_ERR);
299}
300
301
302
303
304
305static void ftgmac100_rxdes_set_page(struct ftgmac100_rxdes *rxdes, struct page *page)
306{
307 rxdes->rxdes2 = (unsigned int)page;
308}
309
310static struct page *ftgmac100_rxdes_get_page(struct ftgmac100_rxdes *rxdes)
311{
312 return (struct page *)rxdes->rxdes2;
313}
314
315
316
317
318static int ftgmac100_next_rx_pointer(int pointer)
319{
320 return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
321}
322
323static void ftgmac100_rx_pointer_advance(struct ftgmac100 *priv)
324{
325 priv->rx_pointer = ftgmac100_next_rx_pointer(priv->rx_pointer);
326}
327
328static struct ftgmac100_rxdes *ftgmac100_current_rxdes(struct ftgmac100 *priv)
329{
330 return &priv->descs->rxdes[priv->rx_pointer];
331}
332
333static struct ftgmac100_rxdes *
334ftgmac100_rx_locate_first_segment(struct ftgmac100 *priv)
335{
336 struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
337
338 while (ftgmac100_rxdes_packet_ready(rxdes)) {
339 if (ftgmac100_rxdes_first_segment(rxdes))
340 return rxdes;
341
342 ftgmac100_rxdes_set_dma_own(rxdes);
343 ftgmac100_rx_pointer_advance(priv);
344 rxdes = ftgmac100_current_rxdes(priv);
345 }
346
347 return NULL;
348}
349
350static bool ftgmac100_rx_packet_error(struct ftgmac100 *priv,
351 struct ftgmac100_rxdes *rxdes)
352{
353 struct net_device *netdev = priv->netdev;
354 bool error = false;
355
356 if (unlikely(ftgmac100_rxdes_rx_error(rxdes))) {
357 if (net_ratelimit())
358 netdev_info(netdev, "rx err\n");
359
360 netdev->stats.rx_errors++;
361 error = true;
362 }
363
364 if (unlikely(ftgmac100_rxdes_crc_error(rxdes))) {
365 if (net_ratelimit())
366 netdev_info(netdev, "rx crc err\n");
367
368 netdev->stats.rx_crc_errors++;
369 error = true;
370 } else if (unlikely(ftgmac100_rxdes_ipcs_err(rxdes))) {
371 if (net_ratelimit())
372 netdev_info(netdev, "rx IP checksum err\n");
373
374 error = true;
375 }
376
377 if (unlikely(ftgmac100_rxdes_frame_too_long(rxdes))) {
378 if (net_ratelimit())
379 netdev_info(netdev, "rx frame too long\n");
380
381 netdev->stats.rx_length_errors++;
382 error = true;
383 } else if (unlikely(ftgmac100_rxdes_runt(rxdes))) {
384 if (net_ratelimit())
385 netdev_info(netdev, "rx runt\n");
386
387 netdev->stats.rx_length_errors++;
388 error = true;
389 } else if (unlikely(ftgmac100_rxdes_odd_nibble(rxdes))) {
390 if (net_ratelimit())
391 netdev_info(netdev, "rx odd nibble\n");
392
393 netdev->stats.rx_length_errors++;
394 error = true;
395 }
396
397 return error;
398}
399
400static void ftgmac100_rx_drop_packet(struct ftgmac100 *priv)
401{
402 struct net_device *netdev = priv->netdev;
403 struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
404 bool done = false;
405
406 if (net_ratelimit())
407 netdev_dbg(netdev, "drop packet %p\n", rxdes);
408
409 do {
410 if (ftgmac100_rxdes_last_segment(rxdes))
411 done = true;
412
413 ftgmac100_rxdes_set_dma_own(rxdes);
414 ftgmac100_rx_pointer_advance(priv);
415 rxdes = ftgmac100_current_rxdes(priv);
416 } while (!done && ftgmac100_rxdes_packet_ready(rxdes));
417
418 netdev->stats.rx_dropped++;
419}
420
421static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
422{
423 struct net_device *netdev = priv->netdev;
424 struct ftgmac100_rxdes *rxdes;
425 struct sk_buff *skb;
426 bool done = false;
427
428 rxdes = ftgmac100_rx_locate_first_segment(priv);
429 if (!rxdes)
430 return false;
431
432 if (unlikely(ftgmac100_rx_packet_error(priv, rxdes))) {
433 ftgmac100_rx_drop_packet(priv);
434 return true;
435 }
436
437
438 skb = netdev_alloc_skb_ip_align(netdev, 128);
439 if (unlikely(!skb)) {
440 if (net_ratelimit())
441 netdev_err(netdev, "rx skb alloc failed\n");
442
443 ftgmac100_rx_drop_packet(priv);
444 return true;
445 }
446
447 if (unlikely(ftgmac100_rxdes_multicast(rxdes)))
448 netdev->stats.multicast++;
449
450
451
452
453
454
455 if ((ftgmac100_rxdes_is_tcp(rxdes) && !ftgmac100_rxdes_tcpcs_err(rxdes)) ||
456 (ftgmac100_rxdes_is_udp(rxdes) && !ftgmac100_rxdes_udpcs_err(rxdes)))
457 skb->ip_summed = CHECKSUM_UNNECESSARY;
458
459 do {
460 dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
461 struct page *page = ftgmac100_rxdes_get_page(rxdes);
462 unsigned int size;
463
464 dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
465
466 size = ftgmac100_rxdes_data_length(rxdes);
467 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 0, size);
468
469 skb->len += size;
470 skb->data_len += size;
471 skb->truesize += PAGE_SIZE;
472
473 if (ftgmac100_rxdes_last_segment(rxdes))
474 done = true;
475
476 ftgmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
477
478 ftgmac100_rx_pointer_advance(priv);
479 rxdes = ftgmac100_current_rxdes(priv);
480 } while (!done);
481
482
483 if (skb->len <= 128) {
484 skb->truesize -= PAGE_SIZE;
485 __pskb_pull_tail(skb, skb->len);
486 } else {
487
488 __pskb_pull_tail(skb, ETH_HLEN);
489 }
490 skb->protocol = eth_type_trans(skb, netdev);
491
492 netdev->stats.rx_packets++;
493 netdev->stats.rx_bytes += skb->len;
494
495
496 napi_gro_receive(&priv->napi, skb);
497
498 (*processed)++;
499 return true;
500}
501
502
503
504
505static void ftgmac100_txdes_reset(struct ftgmac100_txdes *txdes)
506{
507
508 txdes->txdes0 &= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
509 txdes->txdes1 = 0;
510 txdes->txdes2 = 0;
511 txdes->txdes3 = 0;
512}
513
514static bool ftgmac100_txdes_owned_by_dma(struct ftgmac100_txdes *txdes)
515{
516 return txdes->txdes0 & cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
517}
518
519static void ftgmac100_txdes_set_dma_own(struct ftgmac100_txdes *txdes)
520{
521
522
523
524
525 wmb();
526 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
527}
528
529static void ftgmac100_txdes_set_end_of_ring(struct ftgmac100_txdes *txdes)
530{
531 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
532}
533
534static void ftgmac100_txdes_set_first_segment(struct ftgmac100_txdes *txdes)
535{
536 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_FTS);
537}
538
539static void ftgmac100_txdes_set_last_segment(struct ftgmac100_txdes *txdes)
540{
541 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_LTS);
542}
543
544static void ftgmac100_txdes_set_buffer_size(struct ftgmac100_txdes *txdes,
545 unsigned int len)
546{
547 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXBUF_SIZE(len));
548}
549
550static void ftgmac100_txdes_set_txint(struct ftgmac100_txdes *txdes)
551{
552 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TXIC);
553}
554
555static void ftgmac100_txdes_set_tcpcs(struct ftgmac100_txdes *txdes)
556{
557 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TCP_CHKSUM);
558}
559
560static void ftgmac100_txdes_set_udpcs(struct ftgmac100_txdes *txdes)
561{
562 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_UDP_CHKSUM);
563}
564
565static void ftgmac100_txdes_set_ipcs(struct ftgmac100_txdes *txdes)
566{
567 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_IP_CHKSUM);
568}
569
570static void ftgmac100_txdes_set_dma_addr(struct ftgmac100_txdes *txdes,
571 dma_addr_t addr)
572{
573 txdes->txdes3 = cpu_to_le32(addr);
574}
575
576static dma_addr_t ftgmac100_txdes_get_dma_addr(struct ftgmac100_txdes *txdes)
577{
578 return le32_to_cpu(txdes->txdes3);
579}
580
581
582
583
584
585static void ftgmac100_txdes_set_skb(struct ftgmac100_txdes *txdes,
586 struct sk_buff *skb)
587{
588 txdes->txdes2 = (unsigned int)skb;
589}
590
591static struct sk_buff *ftgmac100_txdes_get_skb(struct ftgmac100_txdes *txdes)
592{
593 return (struct sk_buff *)txdes->txdes2;
594}
595
596
597
598
599static int ftgmac100_next_tx_pointer(int pointer)
600{
601 return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
602}
603
604static void ftgmac100_tx_pointer_advance(struct ftgmac100 *priv)
605{
606 priv->tx_pointer = ftgmac100_next_tx_pointer(priv->tx_pointer);
607}
608
609static void ftgmac100_tx_clean_pointer_advance(struct ftgmac100 *priv)
610{
611 priv->tx_clean_pointer = ftgmac100_next_tx_pointer(priv->tx_clean_pointer);
612}
613
614static struct ftgmac100_txdes *ftgmac100_current_txdes(struct ftgmac100 *priv)
615{
616 return &priv->descs->txdes[priv->tx_pointer];
617}
618
619static struct ftgmac100_txdes *
620ftgmac100_current_clean_txdes(struct ftgmac100 *priv)
621{
622 return &priv->descs->txdes[priv->tx_clean_pointer];
623}
624
625static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv)
626{
627 struct net_device *netdev = priv->netdev;
628 struct ftgmac100_txdes *txdes;
629 struct sk_buff *skb;
630 dma_addr_t map;
631
632 if (priv->tx_pending == 0)
633 return false;
634
635 txdes = ftgmac100_current_clean_txdes(priv);
636
637 if (ftgmac100_txdes_owned_by_dma(txdes))
638 return false;
639
640 skb = ftgmac100_txdes_get_skb(txdes);
641 map = ftgmac100_txdes_get_dma_addr(txdes);
642
643 netdev->stats.tx_packets++;
644 netdev->stats.tx_bytes += skb->len;
645
646 dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
647
648 dev_kfree_skb(skb);
649
650 ftgmac100_txdes_reset(txdes);
651
652 ftgmac100_tx_clean_pointer_advance(priv);
653
654 spin_lock(&priv->tx_lock);
655 priv->tx_pending--;
656 spin_unlock(&priv->tx_lock);
657 netif_wake_queue(netdev);
658
659 return true;
660}
661
662static void ftgmac100_tx_complete(struct ftgmac100 *priv)
663{
664 while (ftgmac100_tx_complete_packet(priv))
665 ;
666}
667
668static int ftgmac100_xmit(struct ftgmac100 *priv, struct sk_buff *skb,
669 dma_addr_t map)
670{
671 struct net_device *netdev = priv->netdev;
672 struct ftgmac100_txdes *txdes;
673 unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
674
675 txdes = ftgmac100_current_txdes(priv);
676 ftgmac100_tx_pointer_advance(priv);
677
678
679 ftgmac100_txdes_set_skb(txdes, skb);
680 ftgmac100_txdes_set_dma_addr(txdes, map);
681 ftgmac100_txdes_set_buffer_size(txdes, len);
682
683 ftgmac100_txdes_set_first_segment(txdes);
684 ftgmac100_txdes_set_last_segment(txdes);
685 ftgmac100_txdes_set_txint(txdes);
686 if (skb->ip_summed == CHECKSUM_PARTIAL) {
687 __be16 protocol = skb->protocol;
688
689 if (protocol == cpu_to_be16(ETH_P_IP)) {
690 u8 ip_proto = ip_hdr(skb)->protocol;
691
692 ftgmac100_txdes_set_ipcs(txdes);
693 if (ip_proto == IPPROTO_TCP)
694 ftgmac100_txdes_set_tcpcs(txdes);
695 else if (ip_proto == IPPROTO_UDP)
696 ftgmac100_txdes_set_udpcs(txdes);
697 }
698 }
699
700 spin_lock(&priv->tx_lock);
701 priv->tx_pending++;
702 if (priv->tx_pending == TX_QUEUE_ENTRIES)
703 netif_stop_queue(netdev);
704
705
706 ftgmac100_txdes_set_dma_own(txdes);
707 spin_unlock(&priv->tx_lock);
708
709 ftgmac100_txdma_normal_prio_start_polling(priv);
710
711 return NETDEV_TX_OK;
712}
713
714
715
716
717static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
718 struct ftgmac100_rxdes *rxdes, gfp_t gfp)
719{
720 struct net_device *netdev = priv->netdev;
721 struct page *page;
722 dma_addr_t map;
723
724 page = alloc_page(gfp);
725 if (!page) {
726 if (net_ratelimit())
727 netdev_err(netdev, "failed to allocate rx page\n");
728 return -ENOMEM;
729 }
730
731 map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
732 if (unlikely(dma_mapping_error(priv->dev, map))) {
733 if (net_ratelimit())
734 netdev_err(netdev, "failed to map rx page\n");
735 __free_page(page);
736 return -ENOMEM;
737 }
738
739 ftgmac100_rxdes_set_page(rxdes, page);
740 ftgmac100_rxdes_set_dma_addr(rxdes, map);
741 ftgmac100_rxdes_set_dma_own(rxdes);
742 return 0;
743}
744
745static void ftgmac100_free_buffers(struct ftgmac100 *priv)
746{
747 int i;
748
749 for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
750 struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
751 struct page *page = ftgmac100_rxdes_get_page(rxdes);
752 dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
753
754 if (!page)
755 continue;
756
757 dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
758 __free_page(page);
759 }
760
761 for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
762 struct ftgmac100_txdes *txdes = &priv->descs->txdes[i];
763 struct sk_buff *skb = ftgmac100_txdes_get_skb(txdes);
764 dma_addr_t map = ftgmac100_txdes_get_dma_addr(txdes);
765
766 if (!skb)
767 continue;
768
769 dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
770 dev_kfree_skb(skb);
771 }
772
773 dma_free_coherent(priv->dev, sizeof(struct ftgmac100_descs),
774 priv->descs, priv->descs_dma_addr);
775}
776
777static int ftgmac100_alloc_buffers(struct ftgmac100 *priv)
778{
779 int i;
780
781 priv->descs = dma_alloc_coherent(priv->dev,
782 sizeof(struct ftgmac100_descs),
783 &priv->descs_dma_addr,
784 GFP_KERNEL | __GFP_ZERO);
785 if (!priv->descs)
786 return -ENOMEM;
787
788
789 ftgmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
790
791 for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
792 struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
793
794 if (ftgmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
795 goto err;
796 }
797
798
799 ftgmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
800 return 0;
801
802err:
803 ftgmac100_free_buffers(priv);
804 return -ENOMEM;
805}
806
807
808
809
810static void ftgmac100_adjust_link(struct net_device *netdev)
811{
812 struct ftgmac100 *priv = netdev_priv(netdev);
813 struct phy_device *phydev = priv->phydev;
814 int ier;
815
816 if (phydev->speed == priv->old_speed)
817 return;
818
819 priv->old_speed = phydev->speed;
820
821 ier = ioread32(priv->base + FTGMAC100_OFFSET_IER);
822
823
824 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
825
826 netif_stop_queue(netdev);
827 ftgmac100_stop_hw(priv);
828
829 netif_start_queue(netdev);
830 ftgmac100_init_hw(priv);
831 ftgmac100_start_hw(priv, phydev->speed);
832
833
834 iowrite32(ier, priv->base + FTGMAC100_OFFSET_IER);
835}
836
837static int ftgmac100_mii_probe(struct ftgmac100 *priv)
838{
839 struct net_device *netdev = priv->netdev;
840 struct phy_device *phydev = NULL;
841 int i;
842
843
844 for (i = 0; i < PHY_MAX_ADDR; i++) {
845 struct phy_device *tmp = priv->mii_bus->phy_map[i];
846
847 if (tmp) {
848 phydev = tmp;
849 break;
850 }
851 }
852
853
854 if (!phydev) {
855 netdev_info(netdev, "%s: no PHY found\n", netdev->name);
856 return -ENODEV;
857 }
858
859 phydev = phy_connect(netdev, dev_name(&phydev->dev),
860 &ftgmac100_adjust_link, PHY_INTERFACE_MODE_GMII);
861
862 if (IS_ERR(phydev)) {
863 netdev_err(netdev, "%s: Could not attach to PHY\n", netdev->name);
864 return PTR_ERR(phydev);
865 }
866
867 priv->phydev = phydev;
868 return 0;
869}
870
871
872
873
874static int ftgmac100_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
875{
876 struct net_device *netdev = bus->priv;
877 struct ftgmac100 *priv = netdev_priv(netdev);
878 unsigned int phycr;
879 int i;
880
881 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
882
883
884 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
885
886 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
887 FTGMAC100_PHYCR_REGAD(regnum) |
888 FTGMAC100_PHYCR_MIIRD;
889
890 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
891
892 for (i = 0; i < 10; i++) {
893 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
894
895 if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
896 int data;
897
898 data = ioread32(priv->base + FTGMAC100_OFFSET_PHYDATA);
899 return FTGMAC100_PHYDATA_MIIRDATA(data);
900 }
901
902 udelay(100);
903 }
904
905 netdev_err(netdev, "mdio read timed out\n");
906 return -EIO;
907}
908
909static int ftgmac100_mdiobus_write(struct mii_bus *bus, int phy_addr,
910 int regnum, u16 value)
911{
912 struct net_device *netdev = bus->priv;
913 struct ftgmac100 *priv = netdev_priv(netdev);
914 unsigned int phycr;
915 int data;
916 int i;
917
918 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
919
920
921 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
922
923 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
924 FTGMAC100_PHYCR_REGAD(regnum) |
925 FTGMAC100_PHYCR_MIIWR;
926
927 data = FTGMAC100_PHYDATA_MIIWDATA(value);
928
929 iowrite32(data, priv->base + FTGMAC100_OFFSET_PHYDATA);
930 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
931
932 for (i = 0; i < 10; i++) {
933 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
934
935 if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0)
936 return 0;
937
938 udelay(100);
939 }
940
941 netdev_err(netdev, "mdio write timed out\n");
942 return -EIO;
943}
944
945static int ftgmac100_mdiobus_reset(struct mii_bus *bus)
946{
947 return 0;
948}
949
950
951
952
953static void ftgmac100_get_drvinfo(struct net_device *netdev,
954 struct ethtool_drvinfo *info)
955{
956 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
957 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
958 strlcpy(info->bus_info, dev_name(&netdev->dev), sizeof(info->bus_info));
959}
960
961static int ftgmac100_get_settings(struct net_device *netdev,
962 struct ethtool_cmd *cmd)
963{
964 struct ftgmac100 *priv = netdev_priv(netdev);
965
966 return phy_ethtool_gset(priv->phydev, cmd);
967}
968
969static int ftgmac100_set_settings(struct net_device *netdev,
970 struct ethtool_cmd *cmd)
971{
972 struct ftgmac100 *priv = netdev_priv(netdev);
973
974 return phy_ethtool_sset(priv->phydev, cmd);
975}
976
977static const struct ethtool_ops ftgmac100_ethtool_ops = {
978 .set_settings = ftgmac100_set_settings,
979 .get_settings = ftgmac100_get_settings,
980 .get_drvinfo = ftgmac100_get_drvinfo,
981 .get_link = ethtool_op_get_link,
982};
983
984
985
986
987static irqreturn_t ftgmac100_interrupt(int irq, void *dev_id)
988{
989 struct net_device *netdev = dev_id;
990 struct ftgmac100 *priv = netdev_priv(netdev);
991
992 if (likely(netif_running(netdev))) {
993
994 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
995 napi_schedule(&priv->napi);
996 }
997
998 return IRQ_HANDLED;
999}
1000
1001
1002
1003
1004static int ftgmac100_poll(struct napi_struct *napi, int budget)
1005{
1006 struct ftgmac100 *priv = container_of(napi, struct ftgmac100, napi);
1007 struct net_device *netdev = priv->netdev;
1008 unsigned int status;
1009 bool completed = true;
1010 int rx = 0;
1011
1012 status = ioread32(priv->base + FTGMAC100_OFFSET_ISR);
1013 iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR);
1014
1015 if (status & (FTGMAC100_INT_RPKT_BUF | FTGMAC100_INT_NO_RXBUF)) {
1016
1017
1018
1019
1020
1021
1022
1023 bool retry;
1024
1025 do {
1026 retry = ftgmac100_rx_packet(priv, &rx);
1027 } while (retry && rx < budget);
1028
1029 if (retry && rx == budget)
1030 completed = false;
1031 }
1032
1033 if (status & (FTGMAC100_INT_XPKT_ETH | FTGMAC100_INT_XPKT_LOST)) {
1034
1035
1036
1037
1038
1039
1040
1041
1042 ftgmac100_tx_complete(priv);
1043 }
1044
1045 if (status & (FTGMAC100_INT_NO_RXBUF | FTGMAC100_INT_RPKT_LOST |
1046 FTGMAC100_INT_AHB_ERR | FTGMAC100_INT_PHYSTS_CHG)) {
1047 if (net_ratelimit())
1048 netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
1049 status & FTGMAC100_INT_NO_RXBUF ? "NO_RXBUF " : "",
1050 status & FTGMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
1051 status & FTGMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
1052 status & FTGMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
1053
1054 if (status & FTGMAC100_INT_NO_RXBUF) {
1055
1056 netdev->stats.rx_over_errors++;
1057 }
1058
1059 if (status & FTGMAC100_INT_RPKT_LOST) {
1060
1061 netdev->stats.rx_fifo_errors++;
1062 }
1063 }
1064
1065 if (completed) {
1066 napi_complete(napi);
1067
1068
1069 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1070 }
1071
1072 return rx;
1073}
1074
1075
1076
1077
1078static int ftgmac100_open(struct net_device *netdev)
1079{
1080 struct ftgmac100 *priv = netdev_priv(netdev);
1081 int err;
1082
1083 err = ftgmac100_alloc_buffers(priv);
1084 if (err) {
1085 netdev_err(netdev, "failed to allocate buffers\n");
1086 goto err_alloc;
1087 }
1088
1089 err = request_irq(priv->irq, ftgmac100_interrupt, 0, netdev->name, netdev);
1090 if (err) {
1091 netdev_err(netdev, "failed to request irq %d\n", priv->irq);
1092 goto err_irq;
1093 }
1094
1095 priv->rx_pointer = 0;
1096 priv->tx_clean_pointer = 0;
1097 priv->tx_pointer = 0;
1098 priv->tx_pending = 0;
1099
1100 err = ftgmac100_reset_hw(priv);
1101 if (err)
1102 goto err_hw;
1103
1104 ftgmac100_init_hw(priv);
1105 ftgmac100_start_hw(priv, 10);
1106
1107 phy_start(priv->phydev);
1108
1109 napi_enable(&priv->napi);
1110 netif_start_queue(netdev);
1111
1112
1113 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1114 return 0;
1115
1116err_hw:
1117 free_irq(priv->irq, netdev);
1118err_irq:
1119 ftgmac100_free_buffers(priv);
1120err_alloc:
1121 return err;
1122}
1123
1124static int ftgmac100_stop(struct net_device *netdev)
1125{
1126 struct ftgmac100 *priv = netdev_priv(netdev);
1127
1128
1129 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
1130
1131 netif_stop_queue(netdev);
1132 napi_disable(&priv->napi);
1133 phy_stop(priv->phydev);
1134
1135 ftgmac100_stop_hw(priv);
1136 free_irq(priv->irq, netdev);
1137 ftgmac100_free_buffers(priv);
1138
1139 return 0;
1140}
1141
1142static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
1143 struct net_device *netdev)
1144{
1145 struct ftgmac100 *priv = netdev_priv(netdev);
1146 dma_addr_t map;
1147
1148 if (unlikely(skb->len > MAX_PKT_SIZE)) {
1149 if (net_ratelimit())
1150 netdev_dbg(netdev, "tx packet too big\n");
1151
1152 netdev->stats.tx_dropped++;
1153 dev_kfree_skb(skb);
1154 return NETDEV_TX_OK;
1155 }
1156
1157 map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
1158 if (unlikely(dma_mapping_error(priv->dev, map))) {
1159
1160 if (net_ratelimit())
1161 netdev_err(netdev, "map socket buffer failed\n");
1162
1163 netdev->stats.tx_dropped++;
1164 dev_kfree_skb(skb);
1165 return NETDEV_TX_OK;
1166 }
1167
1168 return ftgmac100_xmit(priv, skb, map);
1169}
1170
1171
1172static int ftgmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1173{
1174 struct ftgmac100 *priv = netdev_priv(netdev);
1175
1176 return phy_mii_ioctl(priv->phydev, ifr, cmd);
1177}
1178
1179static const struct net_device_ops ftgmac100_netdev_ops = {
1180 .ndo_open = ftgmac100_open,
1181 .ndo_stop = ftgmac100_stop,
1182 .ndo_start_xmit = ftgmac100_hard_start_xmit,
1183 .ndo_set_mac_address = eth_mac_addr,
1184 .ndo_validate_addr = eth_validate_addr,
1185 .ndo_do_ioctl = ftgmac100_do_ioctl,
1186};
1187
1188
1189
1190
1191static int ftgmac100_probe(struct platform_device *pdev)
1192{
1193 struct resource *res;
1194 int irq;
1195 struct net_device *netdev;
1196 struct ftgmac100 *priv;
1197 int err;
1198 int i;
1199
1200 if (!pdev)
1201 return -ENODEV;
1202
1203 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1204 if (!res)
1205 return -ENXIO;
1206
1207 irq = platform_get_irq(pdev, 0);
1208 if (irq < 0)
1209 return irq;
1210
1211
1212 netdev = alloc_etherdev(sizeof(*priv));
1213 if (!netdev) {
1214 err = -ENOMEM;
1215 goto err_alloc_etherdev;
1216 }
1217
1218 SET_NETDEV_DEV(netdev, &pdev->dev);
1219
1220 SET_ETHTOOL_OPS(netdev, &ftgmac100_ethtool_ops);
1221 netdev->netdev_ops = &ftgmac100_netdev_ops;
1222 netdev->features = NETIF_F_IP_CSUM | NETIF_F_GRO;
1223
1224 platform_set_drvdata(pdev, netdev);
1225
1226
1227 priv = netdev_priv(netdev);
1228 priv->netdev = netdev;
1229 priv->dev = &pdev->dev;
1230
1231 spin_lock_init(&priv->tx_lock);
1232
1233
1234 netif_napi_add(netdev, &priv->napi, ftgmac100_poll, 64);
1235
1236
1237 priv->res = request_mem_region(res->start, resource_size(res),
1238 dev_name(&pdev->dev));
1239 if (!priv->res) {
1240 dev_err(&pdev->dev, "Could not reserve memory region\n");
1241 err = -ENOMEM;
1242 goto err_req_mem;
1243 }
1244
1245 priv->base = ioremap(res->start, resource_size(res));
1246 if (!priv->base) {
1247 dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
1248 err = -EIO;
1249 goto err_ioremap;
1250 }
1251
1252 priv->irq = irq;
1253
1254
1255 priv->mii_bus = mdiobus_alloc();
1256 if (!priv->mii_bus) {
1257 err = -EIO;
1258 goto err_alloc_mdiobus;
1259 }
1260
1261 priv->mii_bus->name = "ftgmac100_mdio";
1262 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "ftgmac100_mii");
1263
1264 priv->mii_bus->priv = netdev;
1265 priv->mii_bus->read = ftgmac100_mdiobus_read;
1266 priv->mii_bus->write = ftgmac100_mdiobus_write;
1267 priv->mii_bus->reset = ftgmac100_mdiobus_reset;
1268 priv->mii_bus->irq = priv->phy_irq;
1269
1270 for (i = 0; i < PHY_MAX_ADDR; i++)
1271 priv->mii_bus->irq[i] = PHY_POLL;
1272
1273 err = mdiobus_register(priv->mii_bus);
1274 if (err) {
1275 dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
1276 goto err_register_mdiobus;
1277 }
1278
1279 err = ftgmac100_mii_probe(priv);
1280 if (err) {
1281 dev_err(&pdev->dev, "MII Probe failed!\n");
1282 goto err_mii_probe;
1283 }
1284
1285
1286 err = register_netdev(netdev);
1287 if (err) {
1288 dev_err(&pdev->dev, "Failed to register netdev\n");
1289 goto err_register_netdev;
1290 }
1291
1292 netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
1293
1294 if (!is_valid_ether_addr(netdev->dev_addr)) {
1295 eth_hw_addr_random(netdev);
1296 netdev_info(netdev, "generated random MAC address %pM\n",
1297 netdev->dev_addr);
1298 }
1299
1300 return 0;
1301
1302err_register_netdev:
1303 phy_disconnect(priv->phydev);
1304err_mii_probe:
1305 mdiobus_unregister(priv->mii_bus);
1306err_register_mdiobus:
1307 mdiobus_free(priv->mii_bus);
1308err_alloc_mdiobus:
1309 iounmap(priv->base);
1310err_ioremap:
1311 release_resource(priv->res);
1312err_req_mem:
1313 netif_napi_del(&priv->napi);
1314 platform_set_drvdata(pdev, NULL);
1315 free_netdev(netdev);
1316err_alloc_etherdev:
1317 return err;
1318}
1319
1320static int __exit ftgmac100_remove(struct platform_device *pdev)
1321{
1322 struct net_device *netdev;
1323 struct ftgmac100 *priv;
1324
1325 netdev = platform_get_drvdata(pdev);
1326 priv = netdev_priv(netdev);
1327
1328 unregister_netdev(netdev);
1329
1330 phy_disconnect(priv->phydev);
1331 mdiobus_unregister(priv->mii_bus);
1332 mdiobus_free(priv->mii_bus);
1333
1334 iounmap(priv->base);
1335 release_resource(priv->res);
1336
1337 netif_napi_del(&priv->napi);
1338 platform_set_drvdata(pdev, NULL);
1339 free_netdev(netdev);
1340 return 0;
1341}
1342
1343static struct platform_driver ftgmac100_driver = {
1344 .probe = ftgmac100_probe,
1345 .remove = __exit_p(ftgmac100_remove),
1346 .driver = {
1347 .name = DRV_NAME,
1348 .owner = THIS_MODULE,
1349 },
1350};
1351
1352module_platform_driver(ftgmac100_driver);
1353
1354MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
1355MODULE_DESCRIPTION("FTGMAC100 driver");
1356MODULE_LICENSE("GPL");
1357
