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ramips: raeth: add a helper function for skb allocation
[openwrt/svn-archive/archive.git] / target / linux / ramips / files / drivers / net / ramips.c
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; version 2 of the License
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
14 *
15 * Copyright (C) 2009 John Crispin <blogic@openwrt.org>
16 */
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/init.h>
23 #include <linux/skbuff.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/platform_device.h>
27 #include <linux/phy.h>
28
29 #include <ramips_eth_platform.h>
30 #include "ramips_eth.h"
31
32 #define TX_TIMEOUT (20 * HZ / 100)
33 #define MAX_RX_LENGTH 1600
34
35 #ifdef CONFIG_RALINK_RT305X
36 #include "ramips_esw.c"
37 #else
38 static inline int rt305x_esw_init(void) { return 0; }
39 static inline void rt305x_esw_exit(void) { }
40 #endif
41
42 #define phys_to_bus(a) (a & 0x1FFFFFFF)
43
44 #ifdef CONFIG_RAMIPS_ETH_DEBUG
45 #define RADEBUG(fmt, args...) printk(KERN_DEBUG fmt, ## args)
46 #else
47 #define RADEBUG(fmt, args...) do {} while (0)
48 #endif
49
50 static struct net_device * ramips_dev;
51 static void __iomem *ramips_fe_base = 0;
52
53 static inline void
54 ramips_fe_wr(u32 val, unsigned reg)
55 {
56 __raw_writel(val, ramips_fe_base + reg);
57 }
58
59 static inline u32
60 ramips_fe_rr(unsigned reg)
61 {
62 return __raw_readl(ramips_fe_base + reg);
63 }
64
65 static inline void
66 ramips_fe_int_disable(u32 mask)
67 {
68 ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) & ~mask,
69 RAMIPS_FE_INT_ENABLE);
70 /* flush write */
71 ramips_fe_rr(RAMIPS_FE_INT_ENABLE);
72 }
73
74 static inline void
75 ramips_fe_int_enable(u32 mask)
76 {
77 ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | mask,
78 RAMIPS_FE_INT_ENABLE);
79 /* flush write */
80 ramips_fe_rr(RAMIPS_FE_INT_ENABLE);
81 }
82
83 static inline void
84 ramips_hw_set_macaddr(unsigned char *mac)
85 {
86 ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH);
87 ramips_fe_wr((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
88 RAMIPS_GDMA1_MAC_ADRL);
89 }
90
91 static struct sk_buff *
92 ramips_alloc_skb(struct raeth_priv *re)
93 {
94 struct sk_buff *skb;
95
96 skb = netdev_alloc_skb(re->netdev, MAX_RX_LENGTH + NET_IP_ALIGN);
97 if (!skb)
98 return NULL;
99
100 skb_reserve(skb, NET_IP_ALIGN);
101
102 return skb;
103 }
104
105 #if defined(CONFIG_RALINK_RT288X) || defined(CONFIG_RALINK_RT3883)
106
107 #define RAMIPS_MDIO_RETRY 1000
108
109 static unsigned char *ramips_speed_str(struct raeth_priv *re)
110 {
111 switch (re->speed) {
112 case SPEED_1000:
113 return "1000";
114 case SPEED_100:
115 return "100";
116 case SPEED_10:
117 return "10";
118 }
119
120 return "?";
121 }
122
123 static void ramips_link_adjust(struct raeth_priv *re)
124 {
125 struct ramips_eth_platform_data *pdata;
126 u32 mdio_cfg;
127
128 pdata = re->parent->platform_data;
129 if (!re->link) {
130 netif_carrier_off(re->netdev);
131 netdev_info(re->netdev, "link down\n");
132 return;
133 }
134
135 mdio_cfg = RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
136 RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
137 RAMIPS_MDIO_CFG_GP1_FRC_EN;
138
139 if (re->duplex == DUPLEX_FULL)
140 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_DUPLEX;
141
142 if (re->tx_fc)
143 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_TX;
144
145 if (re->rx_fc)
146 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_RX;
147
148 switch (re->speed) {
149 case SPEED_10:
150 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_10;
151 break;
152 case SPEED_100:
153 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_100;
154 break;
155 case SPEED_1000:
156 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_1000;
157 break;
158 default:
159 BUG();
160 }
161
162 ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG);
163
164 netif_carrier_on(re->netdev);
165 netdev_info(re->netdev, "link up (%sMbps/%s duplex)\n",
166 ramips_speed_str(re),
167 (DUPLEX_FULL == re->duplex) ? "Full" : "Half");
168 }
169
170 static int
171 ramips_mdio_wait_ready(struct raeth_priv *re)
172 {
173 int retries;
174
175 retries = RAMIPS_MDIO_RETRY;
176 while (1) {
177 u32 t;
178
179 t = ramips_fe_rr(RAMIPS_MDIO_ACCESS);
180 if ((t & (0x1 << 31)) == 0)
181 return 0;
182
183 if (retries-- == 0)
184 break;
185
186 udelay(1);
187 }
188
189 dev_err(re->parent, "MDIO operation timed out\n");
190 return -ETIMEDOUT;
191 }
192
193 static int
194 ramips_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
195 {
196 struct raeth_priv *re = bus->priv;
197 int err;
198 u32 t;
199
200 err = ramips_mdio_wait_ready(re);
201 if (err)
202 return 0xffff;
203
204 t = (phy_addr << 24) | (phy_reg << 16);
205 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
206 t |= (1 << 31);
207 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
208
209 err = ramips_mdio_wait_ready(re);
210 if (err)
211 return 0xffff;
212
213 RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
214 phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
215
216 return ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff;
217 }
218
219 static int
220 ramips_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val)
221 {
222 struct raeth_priv *re = bus->priv;
223 int err;
224 u32 t;
225
226 RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
227 phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
228
229 err = ramips_mdio_wait_ready(re);
230 if (err)
231 return err;
232
233 t = (1 << 30) | (phy_addr << 24) | (phy_reg << 16) | val;
234 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
235 t |= (1 << 31);
236 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
237
238 return ramips_mdio_wait_ready(re);
239 }
240
241 static int
242 ramips_mdio_reset(struct mii_bus *bus)
243 {
244 /* TODO */
245 return 0;
246 }
247
248 static int
249 ramips_mdio_init(struct raeth_priv *re)
250 {
251 int err;
252 int i;
253
254 re->mii_bus = mdiobus_alloc();
255 if (re->mii_bus == NULL)
256 return -ENOMEM;
257
258 re->mii_bus->name = "ramips_mdio";
259 re->mii_bus->read = ramips_mdio_read;
260 re->mii_bus->write = ramips_mdio_write;
261 re->mii_bus->reset = ramips_mdio_reset;
262 re->mii_bus->irq = re->mii_irq;
263 re->mii_bus->priv = re;
264 re->mii_bus->parent = re->parent;
265
266 snprintf(re->mii_bus->id, MII_BUS_ID_SIZE, "%s", "ramips_mdio");
267 re->mii_bus->phy_mask = 0;
268
269 for (i = 0; i < PHY_MAX_ADDR; i++)
270 re->mii_irq[i] = PHY_POLL;
271
272 err = mdiobus_register(re->mii_bus);
273 if (err)
274 goto err_free_bus;
275
276 return 0;
277
278 err_free_bus:
279 kfree(re->mii_bus);
280 return err;
281 }
282
283 static void
284 ramips_mdio_cleanup(struct raeth_priv *re)
285 {
286 mdiobus_unregister(re->mii_bus);
287 kfree(re->mii_bus);
288 }
289
290 static void
291 ramips_phy_link_adjust(struct net_device *dev)
292 {
293 struct raeth_priv *re = netdev_priv(dev);
294 struct phy_device *phydev = re->phy_dev;
295 unsigned long flags;
296 int status_change = 0;
297
298 spin_lock_irqsave(&re->phy_lock, flags);
299
300 if (phydev->link)
301 if (re->duplex != phydev->duplex ||
302 re->speed != phydev->speed)
303 status_change = 1;
304
305 if (phydev->link != re->link)
306 status_change = 1;
307
308 re->link = phydev->link;
309 re->duplex = phydev->duplex;
310 re->speed = phydev->speed;
311
312 if (status_change)
313 ramips_link_adjust(re);
314
315 spin_unlock_irqrestore(&re->phy_lock, flags);
316 }
317
318 static int
319 ramips_phy_connect_multi(struct raeth_priv *re)
320 {
321 struct net_device *netdev = re->netdev;
322 struct ramips_eth_platform_data *pdata;
323 struct phy_device *phydev = NULL;
324 int phy_addr;
325 int ret = 0;
326
327 pdata = re->parent->platform_data;
328 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
329 if (!(pdata->phy_mask & (1 << phy_addr)))
330 continue;
331
332 if (re->mii_bus->phy_map[phy_addr] == NULL)
333 continue;
334
335 RADEBUG("%s: PHY found at %s, uid=%08x\n",
336 netdev->name,
337 dev_name(&re->mii_bus->phy_map[phy_addr]->dev),
338 re->mii_bus->phy_map[phy_addr]->phy_id);
339
340 if (phydev == NULL)
341 phydev = re->mii_bus->phy_map[phy_addr];
342 }
343
344 if (!phydev) {
345 netdev_err(netdev, "no PHY found with phy_mask=%08x\n",
346 pdata->phy_mask);
347 return -ENODEV;
348 }
349
350 re->phy_dev = phy_connect(netdev, dev_name(&phydev->dev),
351 ramips_phy_link_adjust, 0,
352 pdata->phy_if_mode);
353
354 if (IS_ERR(re->phy_dev)) {
355 netdev_err(netdev, "could not connect to PHY at %s\n",
356 dev_name(&phydev->dev));
357 return PTR_ERR(re->phy_dev);
358 }
359
360 phydev->supported &= PHY_GBIT_FEATURES;
361 phydev->advertising = phydev->supported;
362
363 RADEBUG("%s: connected to PHY at %s [uid=%08x, driver=%s]\n",
364 netdev->name, dev_name(&phydev->dev),
365 phydev->phy_id, phydev->drv->name);
366
367 re->link = 0;
368 re->speed = 0;
369 re->duplex = -1;
370 re->rx_fc = 0;
371 re->tx_fc = 0;
372
373 return ret;
374 }
375
376 static int
377 ramips_phy_connect_fixed(struct raeth_priv *re)
378 {
379 struct ramips_eth_platform_data *pdata;
380
381 pdata = re->parent->platform_data;
382 switch (pdata->speed) {
383 case SPEED_10:
384 case SPEED_100:
385 case SPEED_1000:
386 break;
387 default:
388 netdev_err(re->netdev, "invalid speed specified\n");
389 return -EINVAL;
390 }
391
392 RADEBUG("%s: using fixed link parameters\n", re->netdev->name);
393
394 re->speed = pdata->speed;
395 re->duplex = pdata->duplex;
396 re->tx_fc = pdata->tx_fc;
397 re->rx_fc = pdata->tx_fc;
398
399 return 0;
400 }
401
402 static int
403 ramips_phy_connect(struct raeth_priv *re)
404 {
405 struct ramips_eth_platform_data *pdata;
406
407 pdata = re->parent->platform_data;
408 if (pdata->phy_mask)
409 return ramips_phy_connect_multi(re);
410
411 return ramips_phy_connect_fixed(re);
412 }
413
414 static void
415 ramips_phy_disconnect(struct raeth_priv *re)
416 {
417 if (re->phy_dev)
418 phy_disconnect(re->phy_dev);
419 }
420
421 static void
422 ramips_phy_start(struct raeth_priv *re)
423 {
424 unsigned long flags;
425
426 if (re->phy_dev) {
427 phy_start(re->phy_dev);
428 } else {
429 spin_lock_irqsave(&re->phy_lock, flags);
430 re->link = 1;
431 ramips_link_adjust(re);
432 spin_unlock_irqrestore(&re->phy_lock, flags);
433 }
434 }
435
436 static void
437 ramips_phy_stop(struct raeth_priv *re)
438 {
439 unsigned long flags;
440
441 if (re->phy_dev)
442 phy_stop(re->phy_dev);
443
444 spin_lock_irqsave(&re->phy_lock, flags);
445 re->link = 0;
446 ramips_link_adjust(re);
447 spin_unlock_irqrestore(&re->phy_lock, flags);
448 }
449 #else
450 static inline int
451 ramips_mdio_init(struct raeth_priv *re)
452 {
453 return 0;
454 }
455
456 static inline void
457 ramips_mdio_cleanup(struct raeth_priv *re)
458 {
459 }
460
461 static inline int
462 ramips_phy_connect(struct raeth_priv *re)
463 {
464 return 0;
465 }
466
467 static inline void
468 ramips_phy_disconnect(struct raeth_priv *re)
469 {
470 }
471
472 static inline void
473 ramips_phy_start(struct raeth_priv *re)
474 {
475 }
476
477 static inline void
478 ramips_phy_stop(struct raeth_priv *re)
479 {
480 }
481 #endif /* CONFIG_RALINK_RT288X || CONFIG_RALINK_RT3883 */
482
483 static void
484 ramips_cleanup_dma(struct raeth_priv *re)
485 {
486 int i;
487
488 for (i = 0; i < NUM_RX_DESC; i++)
489 if (re->rx_skb[i]) {
490 dma_unmap_single(&re->netdev->dev, re->rx_dma[i],
491 MAX_RX_LENGTH, DMA_FROM_DEVICE);
492 dev_kfree_skb_any(re->rx_skb[i]);
493 }
494
495 if (re->rx)
496 dma_free_coherent(&re->netdev->dev,
497 NUM_RX_DESC * sizeof(struct ramips_rx_dma),
498 re->rx, re->rx_desc_dma);
499
500 if (re->tx)
501 dma_free_coherent(&re->netdev->dev,
502 NUM_TX_DESC * sizeof(struct ramips_tx_dma),
503 re->tx, re->tx_desc_dma);
504 }
505
506 static int
507 ramips_alloc_dma(struct raeth_priv *re)
508 {
509 int err = -ENOMEM;
510 int i;
511
512 re->skb_free_idx = 0;
513
514 /* setup tx ring */
515 re->tx = dma_alloc_coherent(&re->netdev->dev,
516 NUM_TX_DESC * sizeof(struct ramips_tx_dma),
517 &re->tx_desc_dma, GFP_ATOMIC);
518 if (!re->tx)
519 goto err_cleanup;
520
521 memset(re->tx, 0, NUM_TX_DESC * sizeof(struct ramips_tx_dma));
522 for (i = 0; i < NUM_TX_DESC; i++) {
523 re->tx[i].txd2 = TX_DMA_LSO | TX_DMA_DONE;
524 re->tx[i].txd4 = TX_DMA_QN(3) | TX_DMA_PN(1);
525 }
526
527 /* setup rx ring */
528 re->rx = dma_alloc_coherent(&re->netdev->dev,
529 NUM_RX_DESC * sizeof(struct ramips_rx_dma),
530 &re->rx_desc_dma, GFP_ATOMIC);
531 if (!re->rx)
532 goto err_cleanup;
533
534 memset(re->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
535 for (i = 0; i < NUM_RX_DESC; i++) {
536 dma_addr_t dma_addr;
537 struct sk_buff *new_skb;
538
539 new_skb = ramips_alloc_skb(re);
540 if (!new_skb)
541 goto err_cleanup;
542
543 dma_addr = dma_map_single(&re->netdev->dev, new_skb->data,
544 MAX_RX_LENGTH, DMA_FROM_DEVICE);
545 re->rx_dma[i] = dma_addr;
546 re->rx[i].rxd1 = (unsigned int) re->rx_dma[i];
547 re->rx[i].rxd2 |= RX_DMA_LSO;
548 re->rx_skb[i] = new_skb;
549 }
550
551 return 0;
552
553 err_cleanup:
554 ramips_cleanup_dma(re);
555 return err;
556 }
557
558 static void
559 ramips_setup_dma(struct raeth_priv *re)
560 {
561 ramips_fe_wr(re->tx_desc_dma, RAMIPS_TX_BASE_PTR0);
562 ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0);
563 ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0);
564 ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG);
565
566 ramips_fe_wr(re->rx_desc_dma, RAMIPS_RX_BASE_PTR0);
567 ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0);
568 ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0);
569 ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG);
570 }
571
572 static int
573 ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
574 {
575 struct raeth_priv *re = netdev_priv(dev);
576 unsigned long tx;
577 unsigned int tx_next;
578 dma_addr_t mapped_addr;
579
580 if (re->plat->min_pkt_len) {
581 if (skb->len < re->plat->min_pkt_len) {
582 if (skb_padto(skb, re->plat->min_pkt_len)) {
583 printk(KERN_ERR
584 "ramips_eth: skb_padto failed\n");
585 kfree_skb(skb);
586 return 0;
587 }
588 skb_put(skb, re->plat->min_pkt_len - skb->len);
589 }
590 }
591
592 dev->trans_start = jiffies;
593 mapped_addr = dma_map_single(&re->netdev->dev, skb->data, skb->len,
594 DMA_TO_DEVICE);
595
596 spin_lock(&re->page_lock);
597 tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
598 tx_next = (tx + 1) % NUM_TX_DESC;
599
600 if ((re->tx_skb[tx]) || (re->tx_skb[tx_next]) ||
601 !(re->tx[tx].txd2 & TX_DMA_DONE) ||
602 !(re->tx[tx_next].txd2 & TX_DMA_DONE))
603 goto out;
604
605 re->tx[tx].txd1 = (unsigned int) mapped_addr;
606 re->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
607 re->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
608 dev->stats.tx_packets++;
609 dev->stats.tx_bytes += skb->len;
610 re->tx_skb[tx] = skb;
611 wmb();
612 ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0);
613 spin_unlock(&re->page_lock);
614 return NETDEV_TX_OK;
615
616 out:
617 spin_unlock(&re->page_lock);
618 dev->stats.tx_dropped++;
619 kfree_skb(skb);
620 return NETDEV_TX_OK;
621 }
622
623 static void
624 ramips_eth_rx_hw(unsigned long ptr)
625 {
626 struct net_device *dev = (struct net_device *) ptr;
627 struct raeth_priv *re = netdev_priv(dev);
628 int rx;
629 int max_rx = 16;
630
631 while (max_rx) {
632 struct sk_buff *rx_skb, *new_skb;
633 int pktlen;
634
635 rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC;
636 if (!(re->rx[rx].rxd2 & RX_DMA_DONE))
637 break;
638 max_rx--;
639
640 rx_skb = re->rx_skb[rx];
641 pktlen = RX_DMA_PLEN0(re->rx[rx].rxd2);
642
643 new_skb = ramips_alloc_skb(re);
644 /* Reuse the buffer on allocation failures */
645 if (new_skb) {
646 dma_addr_t dma_addr;
647
648 dma_unmap_single(&re->netdev->dev, re->rx_dma[rx],
649 MAX_RX_LENGTH, DMA_FROM_DEVICE);
650
651 skb_put(rx_skb, pktlen);
652 rx_skb->dev = dev;
653 rx_skb->protocol = eth_type_trans(rx_skb, dev);
654 rx_skb->ip_summed = CHECKSUM_NONE;
655 dev->stats.rx_packets++;
656 dev->stats.rx_bytes += pktlen;
657 netif_rx(rx_skb);
658
659 re->rx_skb[rx] = new_skb;
660
661 dma_addr = dma_map_single(&re->netdev->dev,
662 new_skb->data,
663 MAX_RX_LENGTH,
664 DMA_FROM_DEVICE);
665 re->rx_dma[rx] = dma_addr;
666 re->rx[rx].rxd1 = (unsigned int) dma_addr;
667 } else {
668 dev->stats.rx_dropped++;
669 }
670
671 re->rx[rx].rxd2 &= ~RX_DMA_DONE;
672 wmb();
673 ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
674 }
675
676 if (max_rx == 0)
677 tasklet_schedule(&re->rx_tasklet);
678 else
679 ramips_fe_int_enable(RAMIPS_RX_DLY_INT);
680 }
681
682 static void
683 ramips_eth_tx_housekeeping(unsigned long ptr)
684 {
685 struct net_device *dev = (struct net_device*)ptr;
686 struct raeth_priv *re = netdev_priv(dev);
687
688 spin_lock(&re->page_lock);
689 while ((re->tx[re->skb_free_idx].txd2 & TX_DMA_DONE) &&
690 (re->tx_skb[re->skb_free_idx])) {
691 dev_kfree_skb_irq(re->tx_skb[re->skb_free_idx]);
692 re->tx_skb[re->skb_free_idx] = 0;
693 re->skb_free_idx++;
694 if (re->skb_free_idx >= NUM_TX_DESC)
695 re->skb_free_idx = 0;
696 }
697 spin_unlock(&re->page_lock);
698
699 ramips_fe_int_enable(RAMIPS_TX_DLY_INT);
700 }
701
702 static void
703 ramips_eth_timeout(struct net_device *dev)
704 {
705 struct raeth_priv *re = netdev_priv(dev);
706
707 tasklet_schedule(&re->tx_housekeeping_tasklet);
708 }
709
710 static irqreturn_t
711 ramips_eth_irq(int irq, void *dev)
712 {
713 struct raeth_priv *re = netdev_priv(dev);
714 unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS);
715
716 ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS);
717
718 if (fe_int & RAMIPS_RX_DLY_INT) {
719 ramips_fe_int_disable(RAMIPS_RX_DLY_INT);
720 tasklet_schedule(&re->rx_tasklet);
721 }
722
723 if (fe_int & RAMIPS_TX_DLY_INT) {
724 ramips_fe_int_disable(RAMIPS_TX_DLY_INT);
725 tasklet_schedule(&re->tx_housekeeping_tasklet);
726 }
727
728 return IRQ_HANDLED;
729 }
730
731 static int
732 ramips_eth_open(struct net_device *dev)
733 {
734 struct raeth_priv *re = netdev_priv(dev);
735 int err;
736
737 err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
738 dev->name, dev);
739 if (err)
740 return err;
741
742 err = ramips_alloc_dma(re);
743 if (err)
744 goto err_free_irq;
745
746 ramips_hw_set_macaddr(dev->dev_addr);
747
748 ramips_setup_dma(re);
749 ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
750 (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
751 RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS),
752 RAMIPS_PDMA_GLO_CFG);
753 ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) &
754 ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
755 ((re->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
756 RAMIPS_FE_GLO_CFG);
757
758 tasklet_init(&re->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
759 (unsigned long)dev);
760 tasklet_init(&re->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
761
762 ramips_phy_start(re);
763
764 ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG);
765 ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE);
766 ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) &
767 ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff),
768 RAMIPS_GDMA1_FWD_CFG);
769 ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) &
770 ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN),
771 RAMIPS_CDMA_CSG_CFG);
772 ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG);
773 ramips_fe_wr(1, RAMIPS_FE_RST_GL);
774 ramips_fe_wr(0, RAMIPS_FE_RST_GL);
775
776 netif_start_queue(dev);
777 return 0;
778
779 err_free_irq:
780 free_irq(dev->irq, dev);
781 return err;
782 }
783
784 static int
785 ramips_eth_stop(struct net_device *dev)
786 {
787 struct raeth_priv *re = netdev_priv(dev);
788
789 ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) &
790 ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN),
791 RAMIPS_PDMA_GLO_CFG);
792
793 /* disable all interrupts in the hw */
794 ramips_fe_wr(0, RAMIPS_FE_INT_ENABLE);
795
796 ramips_phy_stop(re);
797 free_irq(dev->irq, dev);
798 netif_stop_queue(dev);
799 tasklet_kill(&re->tx_housekeeping_tasklet);
800 tasklet_kill(&re->rx_tasklet);
801 ramips_cleanup_dma(re);
802 RADEBUG("ramips_eth: stopped\n");
803 return 0;
804 }
805
806 static int __init
807 ramips_eth_probe(struct net_device *dev)
808 {
809 struct raeth_priv *re = netdev_priv(dev);
810 int err;
811
812 BUG_ON(!re->plat->reset_fe);
813 re->plat->reset_fe();
814 net_srandom(jiffies);
815 memcpy(dev->dev_addr, re->plat->mac, ETH_ALEN);
816
817 ether_setup(dev);
818 dev->mtu = 1500;
819 dev->watchdog_timeo = TX_TIMEOUT;
820 spin_lock_init(&re->page_lock);
821 spin_lock_init(&re->phy_lock);
822
823 err = ramips_mdio_init(re);
824 if (err)
825 return err;
826
827 err = ramips_phy_connect(re);
828 if (err)
829 goto err_mdio_cleanup;
830
831 return 0;
832
833 err_mdio_cleanup:
834 ramips_mdio_cleanup(re);
835 return err;
836 }
837
838 static void
839 ramips_eth_uninit(struct net_device *dev)
840 {
841 struct raeth_priv *re = netdev_priv(dev);
842
843 ramips_phy_disconnect(re);
844 ramips_mdio_cleanup(re);
845 }
846
847 static const struct net_device_ops ramips_eth_netdev_ops = {
848 .ndo_init = ramips_eth_probe,
849 .ndo_uninit = ramips_eth_uninit,
850 .ndo_open = ramips_eth_open,
851 .ndo_stop = ramips_eth_stop,
852 .ndo_start_xmit = ramips_eth_hard_start_xmit,
853 .ndo_tx_timeout = ramips_eth_timeout,
854 .ndo_change_mtu = eth_change_mtu,
855 .ndo_set_mac_address = eth_mac_addr,
856 .ndo_validate_addr = eth_validate_addr,
857 };
858
859 static int
860 ramips_eth_plat_probe(struct platform_device *plat)
861 {
862 struct raeth_priv *re;
863 struct ramips_eth_platform_data *data = plat->dev.platform_data;
864 struct resource *res;
865 int err;
866
867 if (!data) {
868 dev_err(&plat->dev, "no platform data specified\n");
869 return -EINVAL;
870 }
871
872 res = platform_get_resource(plat, IORESOURCE_MEM, 0);
873 if (!res) {
874 dev_err(&plat->dev, "no memory resource found\n");
875 return -ENXIO;
876 }
877
878 ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1);
879 if (!ramips_fe_base)
880 return -ENOMEM;
881
882 ramips_dev = alloc_etherdev(sizeof(struct raeth_priv));
883 if (!ramips_dev) {
884 dev_err(&plat->dev, "alloc_etherdev failed\n");
885 err = -ENOMEM;
886 goto err_unmap;
887 }
888
889 strcpy(ramips_dev->name, "eth%d");
890 ramips_dev->irq = platform_get_irq(plat, 0);
891 if (ramips_dev->irq < 0) {
892 dev_err(&plat->dev, "no IRQ resource found\n");
893 err = -ENXIO;
894 goto err_free_dev;
895 }
896 ramips_dev->addr_len = ETH_ALEN;
897 ramips_dev->base_addr = (unsigned long)ramips_fe_base;
898 ramips_dev->netdev_ops = &ramips_eth_netdev_ops;
899
900 re = netdev_priv(ramips_dev);
901
902 re->netdev = ramips_dev;
903 re->parent = &plat->dev;
904 re->speed = data->speed;
905 re->duplex = data->duplex;
906 re->rx_fc = data->rx_fc;
907 re->tx_fc = data->tx_fc;
908 re->plat = data;
909
910 err = register_netdev(ramips_dev);
911 if (err) {
912 dev_err(&plat->dev, "error bringing up device\n");
913 goto err_free_dev;
914 }
915
916 RADEBUG("ramips_eth: loaded\n");
917 return 0;
918
919 err_free_dev:
920 kfree(ramips_dev);
921 err_unmap:
922 iounmap(ramips_fe_base);
923 return err;
924 }
925
926 static int
927 ramips_eth_plat_remove(struct platform_device *plat)
928 {
929 unregister_netdev(ramips_dev);
930 free_netdev(ramips_dev);
931 RADEBUG("ramips_eth: unloaded\n");
932 return 0;
933 }
934
935 static struct platform_driver ramips_eth_driver = {
936 .probe = ramips_eth_plat_probe,
937 .remove = ramips_eth_plat_remove,
938 .driver = {
939 .name = "ramips_eth",
940 .owner = THIS_MODULE,
941 },
942 };
943
944 static int __init
945 ramips_eth_init(void)
946 {
947 int ret;
948
949 ret = rt305x_esw_init();
950 if (ret)
951 return ret;
952
953 ret = platform_driver_register(&ramips_eth_driver);
954 if (ret) {
955 printk(KERN_ERR
956 "ramips_eth: Error registering platfom driver!\n");
957 goto esw_cleanup;
958 }
959
960 return 0;
961
962 esw_cleanup:
963 rt305x_esw_exit();
964 return ret;
965 }
966
967 static void __exit
968 ramips_eth_cleanup(void)
969 {
970 platform_driver_unregister(&ramips_eth_driver);
971 rt305x_esw_exit();
972 }
973
974 module_init(ramips_eth_init);
975 module_exit(ramips_eth_cleanup);
976
977 MODULE_LICENSE("GPL");
978 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
979 MODULE_DESCRIPTION("ethernet driver for ramips boards");
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