projects / openwrt / svn-archive / archive.git / blob
? search:


0a9b22a44344cec046e882b5e6b2dcdcf4c8b3c8
[openwrt/svn-archive/archive.git] / target / linux / ramips / files / drivers / net / ethernet / ramips / ramips_main.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 enum raeth_reg {
51 RAETH_REG_PDMA_GLO_CFG = 0,
52 RAETH_REG_PDMA_RST_CFG,
53 RAETH_REG_DLY_INT_CFG,
54 RAETH_REG_TX_BASE_PTR0,
55 RAETH_REG_TX_MAX_CNT0,
56 RAETH_REG_TX_CTX_IDX0,
57 RAETH_REG_RX_BASE_PTR0,
58 RAETH_REG_RX_MAX_CNT0,
59 RAETH_REG_RX_CALC_IDX0,
60 RAETH_REG_FE_INT_ENABLE,
61 RAETH_REG_FE_INT_STATUS,
62 RAETH_REG_COUNT
63 };
64
65 static const u32 ramips_reg_table[RAETH_REG_COUNT] = {
66 [RAETH_REG_PDMA_GLO_CFG] = RAMIPS_PDMA_GLO_CFG,
67 [RAETH_REG_PDMA_RST_CFG] = RAMIPS_PDMA_RST_CFG,
68 [RAETH_REG_DLY_INT_CFG] = RAMIPS_DLY_INT_CFG,
69 [RAETH_REG_TX_BASE_PTR0] = RAMIPS_TX_BASE_PTR0,
70 [RAETH_REG_TX_MAX_CNT0] = RAMIPS_TX_MAX_CNT0,
71 [RAETH_REG_TX_CTX_IDX0] = RAMIPS_TX_CTX_IDX0,
72 [RAETH_REG_RX_BASE_PTR0] = RAMIPS_RX_BASE_PTR0,
73 [RAETH_REG_RX_MAX_CNT0] = RAMIPS_RX_MAX_CNT0,
74 [RAETH_REG_RX_CALC_IDX0] = RAMIPS_RX_CALC_IDX0,
75 [RAETH_REG_FE_INT_ENABLE] = RAMIPS_FE_INT_ENABLE,
76 [RAETH_REG_FE_INT_STATUS] = RAMIPS_FE_INT_STATUS,
77 };
78
79 static struct net_device * ramips_dev;
80 static void __iomem *ramips_fe_base = 0;
81
82 static inline u32 get_reg_offset(enum raeth_reg reg)
83 {
84 const u32 *table;
85
86 table = ramips_reg_table;
87
88 return table[reg];
89 }
90
91 static inline void
92 ramips_fe_wr(u32 val, unsigned reg)
93 {
94 __raw_writel(val, ramips_fe_base + reg);
95 }
96
97 static inline u32
98 ramips_fe_rr(unsigned reg)
99 {
100 return __raw_readl(ramips_fe_base + reg);
101 }
102
103 static inline void
104 ramips_fe_twr(u32 val, enum raeth_reg reg)
105 {
106 ramips_fe_wr(val, get_reg_offset(reg));
107 }
108
109 static inline u32
110 ramips_fe_trr(enum raeth_reg reg)
111 {
112 return ramips_fe_rr(get_reg_offset(reg));
113 }
114
115 static inline void
116 ramips_fe_int_disable(u32 mask)
117 {
118 ramips_fe_twr(ramips_fe_trr(RAETH_REG_FE_INT_ENABLE) & ~mask,
119 RAETH_REG_FE_INT_ENABLE);
120 /* flush write */
121 ramips_fe_trr(RAETH_REG_FE_INT_ENABLE);
122 }
123
124 static inline void
125 ramips_fe_int_enable(u32 mask)
126 {
127 ramips_fe_twr(ramips_fe_trr(RAETH_REG_FE_INT_ENABLE) | mask,
128 RAETH_REG_FE_INT_ENABLE);
129 /* flush write */
130 ramips_fe_trr(RAETH_REG_FE_INT_ENABLE);
131 }
132
133 static inline void
134 ramips_hw_set_macaddr(unsigned char *mac)
135 {
136 ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH);
137 ramips_fe_wr((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
138 RAMIPS_GDMA1_MAC_ADRL);
139 }
140
141 static struct sk_buff *
142 ramips_alloc_skb(struct raeth_priv *re)
143 {
144 struct sk_buff *skb;
145
146 skb = netdev_alloc_skb(re->netdev, MAX_RX_LENGTH + NET_IP_ALIGN);
147 if (!skb)
148 return NULL;
149
150 skb_reserve(skb, NET_IP_ALIGN);
151
152 return skb;
153 }
154
155 static void
156 ramips_ring_setup(struct raeth_priv *re)
157 {
158 int len;
159 int i;
160
161 memset(re->tx_info, 0, NUM_TX_DESC * sizeof(struct raeth_tx_info));
162
163 len = NUM_TX_DESC * sizeof(struct ramips_tx_dma);
164 memset(re->tx, 0, len);
165
166 for (i = 0; i < NUM_TX_DESC; i++) {
167 struct raeth_tx_info *txi;
168 struct ramips_tx_dma *txd;
169
170 txd = &re->tx[i];
171 txd->txd4 = TX_DMA_QN(3) | TX_DMA_PN(1);
172 txd->txd2 = TX_DMA_LSO | TX_DMA_DONE;
173
174 txi = &re->tx_info[i];
175 txi->tx_desc = txd;
176 if (txi->tx_skb != NULL) {
177 netdev_warn(re->netdev,
178 "dirty skb for TX desc %d\n", i);
179 txi->tx_skb = NULL;
180 }
181 }
182
183 len = NUM_RX_DESC * sizeof(struct ramips_rx_dma);
184 memset(re->rx, 0, len);
185
186 for (i = 0; i < NUM_RX_DESC; i++) {
187 struct raeth_rx_info *rxi;
188 struct ramips_rx_dma *rxd;
189 dma_addr_t dma_addr;
190
191 rxd = &re->rx[i];
192 rxi = &re->rx_info[i];
193 BUG_ON(rxi->rx_skb == NULL);
194 dma_addr = dma_map_single(&re->netdev->dev, rxi->rx_skb->data,
195 MAX_RX_LENGTH, DMA_FROM_DEVICE);
196 rxi->rx_dma = dma_addr;
197 rxi->rx_desc = rxd;
198
199 rxd->rxd1 = (unsigned int) dma_addr;
200 rxd->rxd2 = RX_DMA_LSO;
201 }
202
203 /* flush descriptors */
204 wmb();
205 }
206
207 static void
208 ramips_ring_cleanup(struct raeth_priv *re)
209 {
210 int i;
211
212 for (i = 0; i < NUM_RX_DESC; i++) {
213 struct raeth_rx_info *rxi;
214
215 rxi = &re->rx_info[i];
216 if (rxi->rx_skb)
217 dma_unmap_single(&re->netdev->dev, rxi->rx_dma,
218 MAX_RX_LENGTH, DMA_FROM_DEVICE);
219 }
220
221 for (i = 0; i < NUM_TX_DESC; i++) {
222 struct raeth_tx_info *txi;
223
224 txi = &re->tx_info[i];
225 if (txi->tx_skb) {
226 dev_kfree_skb_any(txi->tx_skb);
227 txi->tx_skb = NULL;
228 }
229 }
230
231 netdev_reset_queue(re->netdev);
232 }
233
234 #if defined(CONFIG_RALINK_RT288X) || defined(CONFIG_RALINK_RT3883)
235
236 #define RAMIPS_MDIO_RETRY 1000
237
238 static unsigned char *ramips_speed_str(struct raeth_priv *re)
239 {
240 switch (re->speed) {
241 case SPEED_1000:
242 return "1000";
243 case SPEED_100:
244 return "100";
245 case SPEED_10:
246 return "10";
247 }
248
249 return "?";
250 }
251
252 static void ramips_link_adjust(struct raeth_priv *re)
253 {
254 struct ramips_eth_platform_data *pdata;
255 u32 mdio_cfg;
256
257 pdata = re->parent->platform_data;
258 if (!re->link) {
259 netif_carrier_off(re->netdev);
260 netdev_info(re->netdev, "link down\n");
261 return;
262 }
263
264 mdio_cfg = RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
265 RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
266 RAMIPS_MDIO_CFG_GP1_FRC_EN;
267
268 if (re->duplex == DUPLEX_FULL)
269 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_DUPLEX;
270
271 if (re->tx_fc)
272 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_TX;
273
274 if (re->rx_fc)
275 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_RX;
276
277 switch (re->speed) {
278 case SPEED_10:
279 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_10;
280 break;
281 case SPEED_100:
282 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_100;
283 break;
284 case SPEED_1000:
285 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_1000;
286 break;
287 default:
288 BUG();
289 }
290
291 ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG);
292
293 netif_carrier_on(re->netdev);
294 netdev_info(re->netdev, "link up (%sMbps/%s duplex)\n",
295 ramips_speed_str(re),
296 (DUPLEX_FULL == re->duplex) ? "Full" : "Half");
297 }
298
299 static int
300 ramips_mdio_wait_ready(struct raeth_priv *re)
301 {
302 int retries;
303
304 retries = RAMIPS_MDIO_RETRY;
305 while (1) {
306 u32 t;
307
308 t = ramips_fe_rr(RAMIPS_MDIO_ACCESS);
309 if ((t & (0x1 << 31)) == 0)
310 return 0;
311
312 if (retries-- == 0)
313 break;
314
315 udelay(1);
316 }
317
318 dev_err(re->parent, "MDIO operation timed out\n");
319 return -ETIMEDOUT;
320 }
321
322 static int
323 ramips_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
324 {
325 struct raeth_priv *re = bus->priv;
326 int err;
327 u32 t;
328
329 err = ramips_mdio_wait_ready(re);
330 if (err)
331 return 0xffff;
332
333 t = (phy_addr << 24) | (phy_reg << 16);
334 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
335 t |= (1 << 31);
336 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
337
338 err = ramips_mdio_wait_ready(re);
339 if (err)
340 return 0xffff;
341
342 RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
343 phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
344
345 return ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff;
346 }
347
348 static int
349 ramips_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val)
350 {
351 struct raeth_priv *re = bus->priv;
352 int err;
353 u32 t;
354
355 RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
356 phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
357
358 err = ramips_mdio_wait_ready(re);
359 if (err)
360 return err;
361
362 t = (1 << 30) | (phy_addr << 24) | (phy_reg << 16) | val;
363 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
364 t |= (1 << 31);
365 ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
366
367 return ramips_mdio_wait_ready(re);
368 }
369
370 static int
371 ramips_mdio_reset(struct mii_bus *bus)
372 {
373 /* TODO */
374 return 0;
375 }
376
377 static int
378 ramips_mdio_init(struct raeth_priv *re)
379 {
380 int err;
381 int i;
382
383 re->mii_bus = mdiobus_alloc();
384 if (re->mii_bus == NULL)
385 return -ENOMEM;
386
387 re->mii_bus->name = "ramips_mdio";
388 re->mii_bus->read = ramips_mdio_read;
389 re->mii_bus->write = ramips_mdio_write;
390 re->mii_bus->reset = ramips_mdio_reset;
391 re->mii_bus->irq = re->mii_irq;
392 re->mii_bus->priv = re;
393 re->mii_bus->parent = re->parent;
394
395 snprintf(re->mii_bus->id, MII_BUS_ID_SIZE, "%s", "ramips_mdio");
396 re->mii_bus->phy_mask = 0;
397
398 for (i = 0; i < PHY_MAX_ADDR; i++)
399 re->mii_irq[i] = PHY_POLL;
400
401 err = mdiobus_register(re->mii_bus);
402 if (err)
403 goto err_free_bus;
404
405 return 0;
406
407 err_free_bus:
408 kfree(re->mii_bus);
409 return err;
410 }
411
412 static void
413 ramips_mdio_cleanup(struct raeth_priv *re)
414 {
415 mdiobus_unregister(re->mii_bus);
416 kfree(re->mii_bus);
417 }
418
419 static void
420 ramips_phy_link_adjust(struct net_device *dev)
421 {
422 struct raeth_priv *re = netdev_priv(dev);
423 struct phy_device *phydev = re->phy_dev;
424 unsigned long flags;
425 int status_change = 0;
426
427 spin_lock_irqsave(&re->phy_lock, flags);
428
429 if (phydev->link)
430 if (re->duplex != phydev->duplex ||
431 re->speed != phydev->speed)
432 status_change = 1;
433
434 if (phydev->link != re->link)
435 status_change = 1;
436
437 re->link = phydev->link;
438 re->duplex = phydev->duplex;
439 re->speed = phydev->speed;
440
441 if (status_change)
442 ramips_link_adjust(re);
443
444 spin_unlock_irqrestore(&re->phy_lock, flags);
445 }
446
447 static int
448 ramips_phy_connect_multi(struct raeth_priv *re)
449 {
450 struct net_device *netdev = re->netdev;
451 struct ramips_eth_platform_data *pdata;
452 struct phy_device *phydev = NULL;
453 int phy_addr;
454 int ret = 0;
455
456 pdata = re->parent->platform_data;
457 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
458 if (!(pdata->phy_mask & (1 << phy_addr)))
459 continue;
460
461 if (re->mii_bus->phy_map[phy_addr] == NULL)
462 continue;
463
464 RADEBUG("%s: PHY found at %s, uid=%08x\n",
465 netdev->name,
466 dev_name(&re->mii_bus->phy_map[phy_addr]->dev),
467 re->mii_bus->phy_map[phy_addr]->phy_id);
468
469 if (phydev == NULL)
470 phydev = re->mii_bus->phy_map[phy_addr];
471 }
472
473 if (!phydev) {
474 netdev_err(netdev, "no PHY found with phy_mask=%08x\n",
475 pdata->phy_mask);
476 return -ENODEV;
477 }
478
479 re->phy_dev = phy_connect(netdev, dev_name(&phydev->dev),
480 ramips_phy_link_adjust, 0,
481 pdata->phy_if_mode);
482
483 if (IS_ERR(re->phy_dev)) {
484 netdev_err(netdev, "could not connect to PHY at %s\n",
485 dev_name(&phydev->dev));
486 return PTR_ERR(re->phy_dev);
487 }
488
489 phydev->supported &= PHY_GBIT_FEATURES;
490 phydev->advertising = phydev->supported;
491
492 RADEBUG("%s: connected to PHY at %s [uid=%08x, driver=%s]\n",
493 netdev->name, dev_name(&phydev->dev),
494 phydev->phy_id, phydev->drv->name);
495
496 re->link = 0;
497 re->speed = 0;
498 re->duplex = -1;
499 re->rx_fc = 0;
500 re->tx_fc = 0;
501
502 return ret;
503 }
504
505 static int
506 ramips_phy_connect_fixed(struct raeth_priv *re)
507 {
508 struct ramips_eth_platform_data *pdata;
509
510 pdata = re->parent->platform_data;
511 switch (pdata->speed) {
512 case SPEED_10:
513 case SPEED_100:
514 case SPEED_1000:
515 break;
516 default:
517 netdev_err(re->netdev, "invalid speed specified\n");
518 return -EINVAL;
519 }
520
521 RADEBUG("%s: using fixed link parameters\n", re->netdev->name);
522
523 re->speed = pdata->speed;
524 re->duplex = pdata->duplex;
525 re->tx_fc = pdata->tx_fc;
526 re->rx_fc = pdata->tx_fc;
527
528 return 0;
529 }
530
531 static int
532 ramips_phy_connect(struct raeth_priv *re)
533 {
534 struct ramips_eth_platform_data *pdata;
535
536 pdata = re->parent->platform_data;
537 if (pdata->phy_mask)
538 return ramips_phy_connect_multi(re);
539
540 return ramips_phy_connect_fixed(re);
541 }
542
543 static void
544 ramips_phy_disconnect(struct raeth_priv *re)
545 {
546 if (re->phy_dev)
547 phy_disconnect(re->phy_dev);
548 }
549
550 static void
551 ramips_phy_start(struct raeth_priv *re)
552 {
553 unsigned long flags;
554
555 if (re->phy_dev) {
556 phy_start(re->phy_dev);
557 } else {
558 spin_lock_irqsave(&re->phy_lock, flags);
559 re->link = 1;
560 ramips_link_adjust(re);
561 spin_unlock_irqrestore(&re->phy_lock, flags);
562 }
563 }
564
565 static void
566 ramips_phy_stop(struct raeth_priv *re)
567 {
568 unsigned long flags;
569
570 if (re->phy_dev)
571 phy_stop(re->phy_dev);
572
573 spin_lock_irqsave(&re->phy_lock, flags);
574 re->link = 0;
575 ramips_link_adjust(re);
576 spin_unlock_irqrestore(&re->phy_lock, flags);
577 }
578 #else
579 static inline int
580 ramips_mdio_init(struct raeth_priv *re)
581 {
582 return 0;
583 }
584
585 static inline void
586 ramips_mdio_cleanup(struct raeth_priv *re)
587 {
588 }
589
590 static inline int
591 ramips_phy_connect(struct raeth_priv *re)
592 {
593 return 0;
594 }
595
596 static inline void
597 ramips_phy_disconnect(struct raeth_priv *re)
598 {
599 }
600
601 static inline void
602 ramips_phy_start(struct raeth_priv *re)
603 {
604 }
605
606 static inline void
607 ramips_phy_stop(struct raeth_priv *re)
608 {
609 }
610 #endif /* CONFIG_RALINK_RT288X || CONFIG_RALINK_RT3883 */
611
612 static void
613 ramips_ring_free(struct raeth_priv *re)
614 {
615 int len;
616 int i;
617
618 if (re->rx_info) {
619 for (i = 0; i < NUM_RX_DESC; i++) {
620 struct raeth_rx_info *rxi;
621
622 rxi = &re->rx_info[i];
623 if (rxi->rx_skb)
624 dev_kfree_skb_any(rxi->rx_skb);
625 }
626 kfree(re->rx_info);
627 }
628
629 if (re->rx) {
630 len = NUM_RX_DESC * sizeof(struct ramips_rx_dma);
631 dma_free_coherent(&re->netdev->dev, len, re->rx,
632 re->rx_desc_dma);
633 }
634
635 if (re->tx) {
636 len = NUM_TX_DESC * sizeof(struct ramips_tx_dma);
637 dma_free_coherent(&re->netdev->dev, len, re->tx,
638 re->tx_desc_dma);
639 }
640
641 kfree(re->tx_info);
642 }
643
644 static int
645 ramips_ring_alloc(struct raeth_priv *re)
646 {
647 int len;
648 int err = -ENOMEM;
649 int i;
650
651 re->tx_info = kzalloc(NUM_TX_DESC * sizeof(struct raeth_tx_info),
652 GFP_ATOMIC);
653 if (!re->tx_info)
654 goto err_cleanup;
655
656 re->rx_info = kzalloc(NUM_RX_DESC * sizeof(struct raeth_rx_info),
657 GFP_ATOMIC);
658 if (!re->rx_info)
659 goto err_cleanup;
660
661 /* allocate tx ring */
662 len = NUM_TX_DESC * sizeof(struct ramips_tx_dma);
663 re->tx = dma_alloc_coherent(&re->netdev->dev, len,
664 &re->tx_desc_dma, GFP_ATOMIC);
665 if (!re->tx)
666 goto err_cleanup;
667
668 /* allocate rx ring */
669 len = NUM_RX_DESC * sizeof(struct ramips_rx_dma);
670 re->rx = dma_alloc_coherent(&re->netdev->dev, len,
671 &re->rx_desc_dma, GFP_ATOMIC);
672 if (!re->rx)
673 goto err_cleanup;
674
675 for (i = 0; i < NUM_RX_DESC; i++) {
676 struct sk_buff *skb;
677
678 skb = ramips_alloc_skb(re);
679 if (!skb)
680 goto err_cleanup;
681
682 re->rx_info[i].rx_skb = skb;
683 }
684
685 return 0;
686
687 err_cleanup:
688 ramips_ring_free(re);
689 return err;
690 }
691
692 static void
693 ramips_setup_dma(struct raeth_priv *re)
694 {
695 ramips_fe_twr(re->tx_desc_dma, RAETH_REG_TX_BASE_PTR0);
696 ramips_fe_twr(NUM_TX_DESC, RAETH_REG_TX_MAX_CNT0);
697 ramips_fe_twr(0, RAETH_REG_TX_CTX_IDX0);
698 ramips_fe_twr(RAMIPS_PST_DTX_IDX0, RAETH_REG_PDMA_RST_CFG);
699
700 ramips_fe_twr(re->rx_desc_dma, RAETH_REG_RX_BASE_PTR0);
701 ramips_fe_twr(NUM_RX_DESC, RAETH_REG_RX_MAX_CNT0);
702 ramips_fe_twr((NUM_RX_DESC - 1), RAETH_REG_RX_CALC_IDX0);
703 ramips_fe_twr(RAMIPS_PST_DRX_IDX0, RAETH_REG_PDMA_RST_CFG);
704 }
705
706 static int
707 ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
708 {
709 struct raeth_priv *re = netdev_priv(dev);
710 struct raeth_tx_info *txi, *txi_next;
711 struct ramips_tx_dma *txd, *txd_next;
712 unsigned long tx;
713 unsigned int tx_next;
714 dma_addr_t mapped_addr;
715
716 if (re->plat->min_pkt_len) {
717 if (skb->len < re->plat->min_pkt_len) {
718 if (skb_padto(skb, re->plat->min_pkt_len)) {
719 printk(KERN_ERR
720 "ramips_eth: skb_padto failed\n");
721 kfree_skb(skb);
722 return 0;
723 }
724 skb_put(skb, re->plat->min_pkt_len - skb->len);
725 }
726 }
727
728 dev->trans_start = jiffies;
729 mapped_addr = dma_map_single(&re->netdev->dev, skb->data, skb->len,
730 DMA_TO_DEVICE);
731
732 spin_lock(&re->page_lock);
733 tx = ramips_fe_trr(RAETH_REG_TX_CTX_IDX0);
734 tx_next = (tx + 1) % NUM_TX_DESC;
735
736 txi = &re->tx_info[tx];
737 txd = txi->tx_desc;
738 txi_next = &re->tx_info[tx_next];
739 txd_next = txi_next->tx_desc;
740
741 if ((txi->tx_skb) || (txi_next->tx_skb) ||
742 !(txd->txd2 & TX_DMA_DONE) ||
743 !(txd_next->txd2 & TX_DMA_DONE))
744 goto out;
745
746 txi->tx_skb = skb;
747
748 txd->txd1 = (unsigned int) mapped_addr;
749 wmb();
750 txd->txd2 = TX_DMA_LSO | TX_DMA_PLEN0(skb->len);
751 dev->stats.tx_packets++;
752 dev->stats.tx_bytes += skb->len;
753 ramips_fe_twr(tx_next, RAETH_REG_TX_CTX_IDX0);
754 netdev_sent_queue(dev, skb->len);
755 spin_unlock(&re->page_lock);
756 return NETDEV_TX_OK;
757
758 out:
759 spin_unlock(&re->page_lock);
760 dev->stats.tx_dropped++;
761 kfree_skb(skb);
762 return NETDEV_TX_OK;
763 }
764
765 static void
766 ramips_eth_rx_hw(unsigned long ptr)
767 {
768 struct net_device *dev = (struct net_device *) ptr;
769 struct raeth_priv *re = netdev_priv(dev);
770 int rx;
771 int max_rx = 16;
772
773 rx = ramips_fe_trr(RAETH_REG_RX_CALC_IDX0);
774
775 while (max_rx) {
776 struct raeth_rx_info *rxi;
777 struct ramips_rx_dma *rxd;
778 struct sk_buff *rx_skb, *new_skb;
779 int pktlen;
780
781 rx = (rx + 1) % NUM_RX_DESC;
782
783 rxi = &re->rx_info[rx];
784 rxd = rxi->rx_desc;
785 if (!(rxd->rxd2 & RX_DMA_DONE))
786 break;
787
788 rx_skb = rxi->rx_skb;
789 pktlen = RX_DMA_PLEN0(rxd->rxd2);
790
791 new_skb = ramips_alloc_skb(re);
792 /* Reuse the buffer on allocation failures */
793 if (new_skb) {
794 dma_addr_t dma_addr;
795
796 dma_unmap_single(&re->netdev->dev, rxi->rx_dma,
797 MAX_RX_LENGTH, DMA_FROM_DEVICE);
798
799 skb_put(rx_skb, pktlen);
800 rx_skb->dev = dev;
801 rx_skb->protocol = eth_type_trans(rx_skb, dev);
802 rx_skb->ip_summed = CHECKSUM_NONE;
803 dev->stats.rx_packets++;
804 dev->stats.rx_bytes += pktlen;
805 netif_rx(rx_skb);
806
807 rxi->rx_skb = new_skb;
808
809 dma_addr = dma_map_single(&re->netdev->dev,
810 new_skb->data,
811 MAX_RX_LENGTH,
812 DMA_FROM_DEVICE);
813 rxi->rx_dma = dma_addr;
814 rxd->rxd1 = (unsigned int) dma_addr;
815 wmb();
816 } else {
817 dev->stats.rx_dropped++;
818 }
819
820 rxd->rxd2 = RX_DMA_LSO;
821 ramips_fe_twr(rx, RAETH_REG_RX_CALC_IDX0);
822 max_rx--;
823 }
824
825 if (max_rx == 0)
826 tasklet_schedule(&re->rx_tasklet);
827 else
828 ramips_fe_int_enable(RAMIPS_RX_DLY_INT);
829 }
830
831 static void
832 ramips_eth_tx_housekeeping(unsigned long ptr)
833 {
834 struct net_device *dev = (struct net_device*)ptr;
835 struct raeth_priv *re = netdev_priv(dev);
836 unsigned int bytes_compl = 0, pkts_compl = 0;
837
838 spin_lock(&re->page_lock);
839 while (1) {
840 struct raeth_tx_info *txi;
841 struct ramips_tx_dma *txd;
842
843 txi = &re->tx_info[re->skb_free_idx];
844 txd = txi->tx_desc;
845
846 if (!(txd->txd2 & TX_DMA_DONE) || !(txi->tx_skb))
847 break;
848
849 pkts_compl++;
850 bytes_compl += txi->tx_skb->len;
851
852 dev_kfree_skb_irq(txi->tx_skb);
853 txi->tx_skb = NULL;
854 re->skb_free_idx++;
855 if (re->skb_free_idx >= NUM_TX_DESC)
856 re->skb_free_idx = 0;
857 }
858 netdev_completed_queue(dev, pkts_compl, bytes_compl);
859 spin_unlock(&re->page_lock);
860
861 ramips_fe_int_enable(RAMIPS_TX_DLY_INT);
862 }
863
864 static void
865 ramips_eth_timeout(struct net_device *dev)
866 {
867 struct raeth_priv *re = netdev_priv(dev);
868
869 tasklet_schedule(&re->tx_housekeeping_tasklet);
870 }
871
872 static irqreturn_t
873 ramips_eth_irq(int irq, void *dev)
874 {
875 struct raeth_priv *re = netdev_priv(dev);
876 unsigned int status;
877
878 status = ramips_fe_trr(RAETH_REG_FE_INT_STATUS);
879 status &= ramips_fe_trr(RAETH_REG_FE_INT_ENABLE);
880
881 if (!status)
882 return IRQ_NONE;
883
884 ramips_fe_twr(status, RAETH_REG_FE_INT_STATUS);
885
886 if (status & RAMIPS_RX_DLY_INT) {
887 ramips_fe_int_disable(RAMIPS_RX_DLY_INT);
888 tasklet_schedule(&re->rx_tasklet);
889 }
890
891 if (status & RAMIPS_TX_DLY_INT) {
892 ramips_fe_int_disable(RAMIPS_TX_DLY_INT);
893 tasklet_schedule(&re->tx_housekeeping_tasklet);
894 }
895
896 raeth_debugfs_update_int_stats(re, status);
897
898 return IRQ_HANDLED;
899 }
900
901 static int
902 ramips_eth_open(struct net_device *dev)
903 {
904 struct raeth_priv *re = netdev_priv(dev);
905 int err;
906
907 err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
908 dev->name, dev);
909 if (err)
910 return err;
911
912 err = ramips_ring_alloc(re);
913 if (err)
914 goto err_free_irq;
915
916 ramips_ring_setup(re);
917 ramips_hw_set_macaddr(dev->dev_addr);
918
919 ramips_setup_dma(re);
920 ramips_fe_twr((ramips_fe_trr(RAETH_REG_PDMA_GLO_CFG) & 0xff) |
921 (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
922 RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS),
923 RAETH_REG_PDMA_GLO_CFG);
924 ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) &
925 ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
926 ((re->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
927 RAMIPS_FE_GLO_CFG);
928
929 tasklet_init(&re->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
930 (unsigned long)dev);
931 tasklet_init(&re->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
932
933 ramips_phy_start(re);
934
935 ramips_fe_twr(RAMIPS_DELAY_INIT, RAETH_REG_DLY_INT_CFG);
936 ramips_fe_twr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAETH_REG_FE_INT_ENABLE);
937 ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) &
938 ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff),
939 RAMIPS_GDMA1_FWD_CFG);
940 ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) &
941 ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN),
942 RAMIPS_CDMA_CSG_CFG);
943 ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG);
944 ramips_fe_wr(1, RAMIPS_FE_RST_GL);
945 ramips_fe_wr(0, RAMIPS_FE_RST_GL);
946
947 netif_start_queue(dev);
948 return 0;
949
950 err_free_irq:
951 free_irq(dev->irq, dev);
952 return err;
953 }
954
955 static int
956 ramips_eth_stop(struct net_device *dev)
957 {
958 struct raeth_priv *re = netdev_priv(dev);
959
960 ramips_fe_twr(ramips_fe_trr(RAETH_REG_PDMA_GLO_CFG) &
961 ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN),
962 RAETH_REG_PDMA_GLO_CFG);
963
964 /* disable all interrupts in the hw */
965 ramips_fe_twr(0, RAETH_REG_FE_INT_ENABLE);
966
967 ramips_phy_stop(re);
968 free_irq(dev->irq, dev);
969 netif_stop_queue(dev);
970 tasklet_kill(&re->tx_housekeeping_tasklet);
971 tasklet_kill(&re->rx_tasklet);
972 ramips_ring_cleanup(re);
973 ramips_ring_free(re);
974 RADEBUG("ramips_eth: stopped\n");
975 return 0;
976 }
977
978 static int __init
979 ramips_eth_probe(struct net_device *dev)
980 {
981 struct raeth_priv *re = netdev_priv(dev);
982 int err;
983
984 BUG_ON(!re->plat->reset_fe);
985 re->plat->reset_fe();
986 net_srandom(jiffies);
987 memcpy(dev->dev_addr, re->plat->mac, ETH_ALEN);
988
989 ether_setup(dev);
990 dev->mtu = 1500;
991 dev->watchdog_timeo = TX_TIMEOUT;
992 spin_lock_init(&re->page_lock);
993 spin_lock_init(&re->phy_lock);
994
995 err = ramips_mdio_init(re);
996 if (err)
997 return err;
998
999 err = ramips_phy_connect(re);
1000 if (err)
1001 goto err_mdio_cleanup;
1002
1003 err = raeth_debugfs_init(re);
1004 if (err)
1005 goto err_phy_disconnect;
1006
1007 return 0;
1008
1009 err_phy_disconnect:
1010 ramips_phy_disconnect(re);
1011 err_mdio_cleanup:
1012 ramips_mdio_cleanup(re);
1013 return err;
1014 }
1015
1016 static void
1017 ramips_eth_uninit(struct net_device *dev)
1018 {
1019 struct raeth_priv *re = netdev_priv(dev);
1020
1021 raeth_debugfs_exit(re);
1022 ramips_phy_disconnect(re);
1023 ramips_mdio_cleanup(re);
1024 }
1025
1026 static const struct net_device_ops ramips_eth_netdev_ops = {
1027 .ndo_init = ramips_eth_probe,
1028 .ndo_uninit = ramips_eth_uninit,
1029 .ndo_open = ramips_eth_open,
1030 .ndo_stop = ramips_eth_stop,
1031 .ndo_start_xmit = ramips_eth_hard_start_xmit,
1032 .ndo_tx_timeout = ramips_eth_timeout,
1033 .ndo_change_mtu = eth_change_mtu,
1034 .ndo_set_mac_address = eth_mac_addr,
1035 .ndo_validate_addr = eth_validate_addr,
1036 };
1037
1038 static int
1039 ramips_eth_plat_probe(struct platform_device *plat)
1040 {
1041 struct raeth_priv *re;
1042 struct ramips_eth_platform_data *data = plat->dev.platform_data;
1043 struct resource *res;
1044 int err;
1045
1046 if (!data) {
1047 dev_err(&plat->dev, "no platform data specified\n");
1048 return -EINVAL;
1049 }
1050
1051 res = platform_get_resource(plat, IORESOURCE_MEM, 0);
1052 if (!res) {
1053 dev_err(&plat->dev, "no memory resource found\n");
1054 return -ENXIO;
1055 }
1056
1057 ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1);
1058 if (!ramips_fe_base)
1059 return -ENOMEM;
1060
1061 ramips_dev = alloc_etherdev(sizeof(struct raeth_priv));
1062 if (!ramips_dev) {
1063 dev_err(&plat->dev, "alloc_etherdev failed\n");
1064 err = -ENOMEM;
1065 goto err_unmap;
1066 }
1067
1068 strcpy(ramips_dev->name, "eth%d");
1069 ramips_dev->irq = platform_get_irq(plat, 0);
1070 if (ramips_dev->irq < 0) {
1071 dev_err(&plat->dev, "no IRQ resource found\n");
1072 err = -ENXIO;
1073 goto err_free_dev;
1074 }
1075 ramips_dev->addr_len = ETH_ALEN;
1076 ramips_dev->base_addr = (unsigned long)ramips_fe_base;
1077 ramips_dev->netdev_ops = &ramips_eth_netdev_ops;
1078
1079 re = netdev_priv(ramips_dev);
1080
1081 re->netdev = ramips_dev;
1082 re->parent = &plat->dev;
1083 re->speed = data->speed;
1084 re->duplex = data->duplex;
1085 re->rx_fc = data->rx_fc;
1086 re->tx_fc = data->tx_fc;
1087 re->plat = data;
1088
1089 err = register_netdev(ramips_dev);
1090 if (err) {
1091 dev_err(&plat->dev, "error bringing up device\n");
1092 goto err_free_dev;
1093 }
1094
1095 RADEBUG("ramips_eth: loaded\n");
1096 return 0;
1097
1098 err_free_dev:
1099 kfree(ramips_dev);
1100 err_unmap:
1101 iounmap(ramips_fe_base);
1102 return err;
1103 }
1104
1105 static int
1106 ramips_eth_plat_remove(struct platform_device *plat)
1107 {
1108 unregister_netdev(ramips_dev);
1109 free_netdev(ramips_dev);
1110 RADEBUG("ramips_eth: unloaded\n");
1111 return 0;
1112 }
1113
1114 static struct platform_driver ramips_eth_driver = {
1115 .probe = ramips_eth_plat_probe,
1116 .remove = ramips_eth_plat_remove,
1117 .driver = {
1118 .name = "ramips_eth",
1119 .owner = THIS_MODULE,
1120 },
1121 };
1122
1123 static int __init
1124 ramips_eth_init(void)
1125 {
1126 int ret;
1127
1128 ret = raeth_debugfs_root_init();
1129 if (ret)
1130 goto err_out;
1131
1132 ret = rt305x_esw_init();
1133 if (ret)
1134 goto err_debugfs_exit;
1135
1136 ret = platform_driver_register(&ramips_eth_driver);
1137 if (ret) {
1138 printk(KERN_ERR
1139 "ramips_eth: Error registering platfom driver!\n");
1140 goto esw_cleanup;
1141 }
1142
1143 return 0;
1144
1145 esw_cleanup:
1146 rt305x_esw_exit();
1147 err_debugfs_exit:
1148 raeth_debugfs_root_exit();
1149 err_out:
1150 return ret;
1151 }
1152
1153 static void __exit
1154 ramips_eth_cleanup(void)
1155 {
1156 platform_driver_unregister(&ramips_eth_driver);
1157 rt305x_esw_exit();
1158 raeth_debugfs_root_exit();
1159 }
1160
1161 module_init(ramips_eth_init);
1162 module_exit(ramips_eth_cleanup);
1163
1164 MODULE_LICENSE("GPL");
1165 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
1166 MODULE_DESCRIPTION("ethernet driver for ramips boards");
OpenWrt SVN history