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
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.
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.
15 * Copyright (C) 2009 John Crispin <blogic@openwrt.org>
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>
28 #include <ramips_eth_platform.h>
29 #include "ramips_eth.h"
31 #define TX_TIMEOUT (20 * HZ / 100)
32 #define MAX_RX_LENGTH 1600
34 #ifdef CONFIG_RALINK_RT305X
35 #include "ramips_esw.c"
37 static inline int rt305x_esw_init(void) { return 0; }
38 static inline void rt305x_esw_exit(void) { }
41 #define phys_to_bus(a) (a & 0x1FFFFFFF)
43 #ifdef CONFIG_RAMIPS_ETH_DEBUG
44 #define RADEBUG(fmt, args...) printk(KERN_DEBUG fmt, ## args)
46 #define RADEBUG(fmt, args...) do {} while (0)
49 static struct net_device * ramips_dev;
50 static void __iomem *ramips_fe_base = 0;
53 ramips_fe_wr(u32 val, unsigned reg)
55 __raw_writel(val, ramips_fe_base + reg);
59 ramips_fe_rr(unsigned reg)
61 return __raw_readl(ramips_fe_base + reg);
65 ramips_fe_int_disable(u32 mask)
67 ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) & ~mask,
68 RAMIPS_FE_INT_ENABLE);
70 ramips_fe_rr(RAMIPS_FE_INT_ENABLE);
74 ramips_fe_int_enable(u32 mask)
76 ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | mask,
77 RAMIPS_FE_INT_ENABLE);
79 ramips_fe_rr(RAMIPS_FE_INT_ENABLE);
83 ramips_hw_set_macaddr(unsigned char *mac)
85 ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH);
86 ramips_fe_wr((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
87 RAMIPS_GDMA1_MAC_ADRL);
90 #ifdef CONFIG_RALINK_RT288X
92 ramips_setup_mdio_cfg(struct raeth_priv *re)
94 unsigned int mdio_cfg;
96 mdio_cfg = RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
97 RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
98 RAMIPS_MDIO_CFG_GP1_FRC_EN;
100 if (re->duplex == DUPLEX_FULL)
101 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_DUPLEX;
104 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_TX;
107 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_RX;
111 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_10;
114 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_100;
117 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_1000;
123 ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG);
126 static inline void ramips_setup_mdio_cfg(struct raeth_priv *re)
129 #endif /* CONFIG_RALINK_RT288X */
132 ramips_cleanup_dma(struct raeth_priv *re)
136 for (i = 0; i < NUM_RX_DESC; i++)
138 dma_unmap_single(&re->netdev->dev, re->rx_dma[i],
139 MAX_RX_LENGTH, DMA_FROM_DEVICE);
140 dev_kfree_skb_any(re->rx_skb[i]);
144 dma_free_coherent(&re->netdev->dev,
145 NUM_RX_DESC * sizeof(struct ramips_rx_dma),
146 re->rx, re->rx_desc_dma);
149 dma_free_coherent(&re->netdev->dev,
150 NUM_TX_DESC * sizeof(struct ramips_tx_dma),
151 re->tx, re->tx_desc_dma);
155 ramips_alloc_dma(struct raeth_priv *re)
160 re->skb_free_idx = 0;
163 re->tx = dma_alloc_coherent(&re->netdev->dev,
164 NUM_TX_DESC * sizeof(struct ramips_tx_dma),
165 &re->tx_desc_dma, GFP_ATOMIC);
169 memset(re->tx, 0, NUM_TX_DESC * sizeof(struct ramips_tx_dma));
170 for (i = 0; i < NUM_TX_DESC; i++) {
171 re->tx[i].txd2 = TX_DMA_LSO | TX_DMA_DONE;
172 re->tx[i].txd4 = TX_DMA_QN(3) | TX_DMA_PN(1);
176 re->rx = dma_alloc_coherent(&re->netdev->dev,
177 NUM_RX_DESC * sizeof(struct ramips_rx_dma),
178 &re->rx_desc_dma, GFP_ATOMIC);
182 memset(re->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
183 for (i = 0; i < NUM_RX_DESC; i++) {
185 struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH +
191 skb_reserve(new_skb, NET_IP_ALIGN);
193 dma_addr = dma_map_single(&re->netdev->dev, new_skb->data,
194 MAX_RX_LENGTH, DMA_FROM_DEVICE);
195 re->rx_dma[i] = dma_addr;
196 re->rx[i].rxd1 = (unsigned int) re->rx_dma[i];
197 re->rx[i].rxd2 |= RX_DMA_LSO;
198 re->rx_skb[i] = new_skb;
204 ramips_cleanup_dma(re);
209 ramips_setup_dma(struct raeth_priv *re)
211 ramips_fe_wr(re->tx_desc_dma, RAMIPS_TX_BASE_PTR0);
212 ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0);
213 ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0);
214 ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG);
216 ramips_fe_wr(re->rx_desc_dma, RAMIPS_RX_BASE_PTR0);
217 ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0);
218 ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0);
219 ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG);
223 ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
225 struct raeth_priv *priv = netdev_priv(dev);
227 unsigned int tx_next;
228 dma_addr_t mapped_addr;
230 if (priv->plat->min_pkt_len) {
231 if (skb->len < priv->plat->min_pkt_len) {
232 if (skb_padto(skb, priv->plat->min_pkt_len)) {
234 "ramips_eth: skb_padto failed\n");
238 skb_put(skb, priv->plat->min_pkt_len - skb->len);
242 dev->trans_start = jiffies;
243 mapped_addr = dma_map_single(&priv->netdev->dev, skb->data, skb->len,
246 spin_lock(&priv->page_lock);
247 tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
248 tx_next = (tx + 1) % NUM_TX_DESC;
250 if ((priv->tx_skb[tx]) || (priv->tx_skb[tx_next]) ||
251 !(priv->tx[tx].txd2 & TX_DMA_DONE) ||
252 !(priv->tx[tx_next].txd2 & TX_DMA_DONE))
255 priv->tx[tx].txd1 = (unsigned int) mapped_addr;
256 priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
257 priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
258 dev->stats.tx_packets++;
259 dev->stats.tx_bytes += skb->len;
260 priv->tx_skb[tx] = skb;
262 ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0);
263 spin_unlock(&priv->page_lock);
267 spin_unlock(&priv->page_lock);
268 dev->stats.tx_dropped++;
274 ramips_eth_rx_hw(unsigned long ptr)
276 struct net_device *dev = (struct net_device *) ptr;
277 struct raeth_priv *priv = netdev_priv(dev);
282 struct sk_buff *rx_skb, *new_skb;
285 rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC;
286 if (!(priv->rx[rx].rxd2 & RX_DMA_DONE))
290 rx_skb = priv->rx_skb[rx];
291 pktlen = RX_DMA_PLEN0(priv->rx[rx].rxd2);
293 new_skb = netdev_alloc_skb(dev, MAX_RX_LENGTH + NET_IP_ALIGN);
294 /* Reuse the buffer on allocation failures */
298 dma_unmap_single(&priv->netdev->dev, priv->rx_dma[rx],
299 MAX_RX_LENGTH, DMA_FROM_DEVICE);
301 skb_put(rx_skb, pktlen);
303 rx_skb->protocol = eth_type_trans(rx_skb, dev);
304 rx_skb->ip_summed = CHECKSUM_NONE;
305 dev->stats.rx_packets++;
306 dev->stats.rx_bytes += pktlen;
309 priv->rx_skb[rx] = new_skb;
310 skb_reserve(new_skb, NET_IP_ALIGN);
312 dma_addr = dma_map_single(&priv->netdev->dev,
316 priv->rx_dma[rx] = dma_addr;
317 priv->rx[rx].rxd1 = (unsigned int) dma_addr;
319 dev->stats.rx_dropped++;
322 priv->rx[rx].rxd2 &= ~RX_DMA_DONE;
324 ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
328 tasklet_schedule(&priv->rx_tasklet);
330 ramips_fe_int_enable(RAMIPS_RX_DLY_INT);
334 ramips_eth_tx_housekeeping(unsigned long ptr)
336 struct net_device *dev = (struct net_device*)ptr;
337 struct raeth_priv *priv = netdev_priv(dev);
339 spin_lock(&priv->page_lock);
340 while ((priv->tx[priv->skb_free_idx].txd2 & TX_DMA_DONE) &&
341 (priv->tx_skb[priv->skb_free_idx])) {
342 dev_kfree_skb_irq(priv->tx_skb[priv->skb_free_idx]);
343 priv->tx_skb[priv->skb_free_idx] = 0;
344 priv->skb_free_idx++;
345 if (priv->skb_free_idx >= NUM_TX_DESC)
346 priv->skb_free_idx = 0;
348 spin_unlock(&priv->page_lock);
350 ramips_fe_int_enable(RAMIPS_TX_DLY_INT);
354 ramips_eth_timeout(struct net_device *dev)
356 struct raeth_priv *priv = netdev_priv(dev);
358 tasklet_schedule(&priv->tx_housekeeping_tasklet);
362 ramips_eth_irq(int irq, void *dev)
364 struct raeth_priv *priv = netdev_priv(dev);
365 unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS);
367 ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS);
369 if (fe_int & RAMIPS_RX_DLY_INT) {
370 ramips_fe_int_disable(RAMIPS_RX_DLY_INT);
371 tasklet_schedule(&priv->rx_tasklet);
374 if (fe_int & RAMIPS_TX_DLY_INT) {
375 ramips_fe_int_disable(RAMIPS_TX_DLY_INT);
376 tasklet_schedule(&priv->tx_housekeeping_tasklet);
383 ramips_eth_open(struct net_device *dev)
385 struct raeth_priv *priv = netdev_priv(dev);
388 err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
393 err = ramips_alloc_dma(priv);
397 ramips_hw_set_macaddr(dev->dev_addr);
399 ramips_setup_dma(priv);
400 ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
401 (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
402 RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS),
403 RAMIPS_PDMA_GLO_CFG);
404 ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) &
405 ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
406 ((priv->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
409 tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
411 tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
413 ramips_setup_mdio_cfg(priv);
415 ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG);
416 ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE);
417 ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) &
418 ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff),
419 RAMIPS_GDMA1_FWD_CFG);
420 ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) &
421 ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN),
422 RAMIPS_CDMA_CSG_CFG);
423 ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG);
424 ramips_fe_wr(1, RAMIPS_FE_RST_GL);
425 ramips_fe_wr(0, RAMIPS_FE_RST_GL);
427 netif_start_queue(dev);
431 free_irq(dev->irq, dev);
436 ramips_eth_stop(struct net_device *dev)
438 struct raeth_priv *priv = netdev_priv(dev);
440 ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) &
441 ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN),
442 RAMIPS_PDMA_GLO_CFG);
444 /* disable all interrupts in the hw */
445 ramips_fe_wr(0, RAMIPS_FE_INT_ENABLE);
447 free_irq(dev->irq, dev);
448 netif_stop_queue(dev);
449 tasklet_kill(&priv->tx_housekeeping_tasklet);
450 tasklet_kill(&priv->rx_tasklet);
451 ramips_cleanup_dma(priv);
452 RADEBUG("ramips_eth: stopped\n");
457 ramips_eth_probe(struct net_device *dev)
459 struct raeth_priv *priv = netdev_priv(dev);
461 BUG_ON(!priv->plat->reset_fe);
462 priv->plat->reset_fe();
463 net_srandom(jiffies);
464 memcpy(dev->dev_addr, priv->plat->mac, ETH_ALEN);
468 dev->watchdog_timeo = TX_TIMEOUT;
469 spin_lock_init(&priv->page_lock);
474 static const struct net_device_ops ramips_eth_netdev_ops = {
475 .ndo_init = ramips_eth_probe,
476 .ndo_open = ramips_eth_open,
477 .ndo_stop = ramips_eth_stop,
478 .ndo_start_xmit = ramips_eth_hard_start_xmit,
479 .ndo_tx_timeout = ramips_eth_timeout,
480 .ndo_change_mtu = eth_change_mtu,
481 .ndo_set_mac_address = eth_mac_addr,
482 .ndo_validate_addr = eth_validate_addr,
486 ramips_eth_plat_probe(struct platform_device *plat)
488 struct raeth_priv *priv;
489 struct ramips_eth_platform_data *data = plat->dev.platform_data;
490 struct resource *res;
494 dev_err(&plat->dev, "no platform data specified\n");
498 res = platform_get_resource(plat, IORESOURCE_MEM, 0);
500 dev_err(&plat->dev, "no memory resource found\n");
504 ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1);
508 ramips_dev = alloc_etherdev(sizeof(struct raeth_priv));
510 dev_err(&plat->dev, "alloc_etherdev failed\n");
515 strcpy(ramips_dev->name, "eth%d");
516 ramips_dev->irq = platform_get_irq(plat, 0);
517 if (ramips_dev->irq < 0) {
518 dev_err(&plat->dev, "no IRQ resource found\n");
522 ramips_dev->addr_len = ETH_ALEN;
523 ramips_dev->base_addr = (unsigned long)ramips_fe_base;
524 ramips_dev->netdev_ops = &ramips_eth_netdev_ops;
526 priv = netdev_priv(ramips_dev);
528 priv->netdev = ramips_dev;
529 priv->speed = data->speed;
530 priv->duplex = data->duplex;
531 priv->rx_fc = data->rx_fc;
532 priv->tx_fc = data->tx_fc;
535 err = register_netdev(ramips_dev);
537 dev_err(&plat->dev, "error bringing up device\n");
541 RADEBUG("ramips_eth: loaded\n");
547 iounmap(ramips_fe_base);
552 ramips_eth_plat_remove(struct platform_device *plat)
554 unregister_netdev(ramips_dev);
555 free_netdev(ramips_dev);
556 RADEBUG("ramips_eth: unloaded\n");
560 static struct platform_driver ramips_eth_driver = {
561 .probe = ramips_eth_plat_probe,
562 .remove = ramips_eth_plat_remove,
564 .name = "ramips_eth",
565 .owner = THIS_MODULE,
570 ramips_eth_init(void)
574 ret = rt305x_esw_init();
578 ret = platform_driver_register(&ramips_eth_driver);
581 "ramips_eth: Error registering platfom driver!\n");
593 ramips_eth_cleanup(void)
595 platform_driver_unregister(&ramips_eth_driver);
599 module_init(ramips_eth_init);
600 module_exit(ramips_eth_cleanup);
602 MODULE_LICENSE("GPL");
603 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
604 MODULE_DESCRIPTION("ethernet driver for ramips boards");