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
  28 #include <ramips_eth_platform.h>
  29 #include "ramips_eth.h"
  30
  31 #define TX_TIMEOUT (20 * HZ / 100)
  32 #define MAX_RX_LENGTH   1600
  33
  34 #ifdef CONFIG_RALINK_RT305X
  35 #include "ramips_esw.c"
  36 #else
  37 static inline int rt305x_esw_init(void) { return 0; }
  38 static inline void rt305x_esw_exit(void) { }
  39 #endif
  40
  41 #define phys_to_bus(a)  (a & 0x1FFFFFFF)
  42
  43 static struct net_device * ramips_dev;
  44 static void __iomem *ramips_fe_base = 0;
  45
  46 static inline void
  47 ramips_fe_wr(u32 val, unsigned reg)
  48 {
  49         __raw_writel(val, ramips_fe_base + reg);
  50 }
  51
  52 static inline u32
  53 ramips_fe_rr(unsigned reg)
  54 {
  55         return __raw_readl(ramips_fe_base + reg);
  56 }
  57
  58 static inline void
  59 ramips_fe_int_disable(u32 mask)
  60 {
  61         ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) & ~mask,
  62                      RAMIPS_FE_INT_ENABLE);
  63         /* flush write */
  64         ramips_fe_rr(RAMIPS_FE_INT_ENABLE);
  65 }
  66
  67 static inline void
  68 ramips_fe_int_enable(u32 mask)
  69 {
  70         ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | mask,
  71                      RAMIPS_FE_INT_ENABLE);
  72         /* flush write */
  73         ramips_fe_rr(RAMIPS_FE_INT_ENABLE);
  74 }
  75
  76 static inline void
  77 ramips_hw_set_macaddr(unsigned char *mac)
  78 {
  79         ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH);
  80         ramips_fe_wr((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
  81                      RAMIPS_GDMA1_MAC_ADRL);
  82 }
  83
  84 #ifdef CONFIG_RALINK_RT288X
  85 static void
  86 ramips_setup_mdio_cfg(struct raeth_priv *re)
  87 {
  88         unsigned int mdio_cfg;
  89
  90         mdio_cfg = RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
  91                    RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
  92                    RAMIPS_MDIO_CFG_GP1_FRC_EN;
  93
  94         if (re->duplex == DUPLEX_FULL)
  95                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_DUPLEX;
  96
  97         if (re->tx_fc)
  98                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_TX;
  99
 100         if (re->rx_fc)
 101                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_RX;
 102
 103         switch (re->speed) {
 104         case SPEED_10:
 105                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_10;
 106                 break;
 107         case SPEED_100:
 108                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_100;
 109                 break;
 110         case SPEED_1000:
 111                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_1000;
 112                 break;
 113         default:
 114                 BUG();
 115         }
 116
 117         ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG);
 118 }
 119 #else
 120 static inline void ramips_setup_mdio_cfg(struct raeth_priv *re)
 121 {
 122 }
 123 #endif /* CONFIG_RALINK_RT288X */
 124
 125 static void
 126 ramips_cleanup_dma(struct raeth_priv *re)
 127 {
 128         int i;
 129
 130         for (i = 0; i < NUM_RX_DESC; i++)
 131                 if (re->rx_skb[i])
 132                         dev_kfree_skb_any(re->rx_skb[i]);
 133
 134         if (re->rx)
 135                 dma_free_coherent(NULL,
 136                                   NUM_RX_DESC * sizeof(struct ramips_rx_dma),
 137                                   re->rx, re->phy_rx);
 138
 139         if (re->tx)
 140                 dma_free_coherent(NULL,
 141                                   NUM_TX_DESC * sizeof(struct ramips_tx_dma),
 142                                   re->tx, re->phy_tx);
 143 }
 144
 145 static int
 146 ramips_alloc_dma(struct raeth_priv *re)
 147 {
 148         int err = -ENOMEM;
 149         int i;
 150
 151         re->skb_free_idx = 0;
 152
 153         /* setup tx ring */
 154         re->tx = dma_alloc_coherent(NULL,
 155                                     NUM_TX_DESC * sizeof(struct ramips_tx_dma),
 156                                     &re->phy_tx, GFP_ATOMIC);
 157         if (!re->tx)
 158                 goto err_cleanup;
 159
 160         memset(re->tx, 0, NUM_TX_DESC * sizeof(struct ramips_tx_dma));
 161         for (i = 0; i < NUM_TX_DESC; i++) {
 162                 re->tx[i].txd2 = TX_DMA_LSO | TX_DMA_DONE;
 163                 re->tx[i].txd4 = TX_DMA_QN(3) | TX_DMA_PN(1);
 164         }
 165
 166         /* setup rx ring */
 167         re->rx = dma_alloc_coherent(NULL,
 168                                     NUM_RX_DESC * sizeof(struct ramips_rx_dma),
 169                                     &re->phy_rx, GFP_ATOMIC);
 170         if (!re->rx)
 171                 goto err_cleanup;
 172
 173         memset(re->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
 174         for (i = 0; i < NUM_RX_DESC; i++) {
 175                 struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH +
 176                                                         NET_IP_ALIGN);
 177
 178                 if (!new_skb)
 179                         goto err_cleanup;
 180
 181                 skb_reserve(new_skb, NET_IP_ALIGN);
 182                 re->rx[i].rxd1 = dma_map_single(NULL,
 183                                                 new_skb->data,
 184                                                 MAX_RX_LENGTH,
 185                                                 DMA_FROM_DEVICE);
 186                 re->rx[i].rxd2 |= RX_DMA_LSO;
 187                 re->rx_skb[i] = new_skb;
 188         }
 189
 190         return 0;
 191
 192  err_cleanup:
 193         ramips_cleanup_dma(re);
 194         return err;
 195 }
 196
 197 static void
 198 ramips_setup_dma(struct raeth_priv *re)
 199 {
 200         ramips_fe_wr(phys_to_bus(re->phy_tx), RAMIPS_TX_BASE_PTR0);
 201         ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0);
 202         ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0);
 203         ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG);
 204
 205         ramips_fe_wr(phys_to_bus(re->phy_rx), RAMIPS_RX_BASE_PTR0);
 206         ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0);
 207         ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0);
 208         ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG);
 209 }
 210
 211 static int
 212 ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 213 {
 214         struct raeth_priv *priv = netdev_priv(dev);
 215         unsigned long tx;
 216         unsigned int tx_next;
 217         unsigned int mapped_addr;
 218
 219         if (priv->plat->min_pkt_len) {
 220                 if (skb->len < priv->plat->min_pkt_len) {
 221                         if (skb_padto(skb, priv->plat->min_pkt_len)) {
 222                                 printk(KERN_ERR
 223                                        "ramips_eth: skb_padto failed\n");
 224                                 kfree_skb(skb);
 225                                 return 0;
 226                         }
 227                         skb_put(skb, priv->plat->min_pkt_len - skb->len);
 228                 }
 229         }
 230
 231         dev->trans_start = jiffies;
 232         mapped_addr = (unsigned int) dma_map_single(NULL, skb->data, skb->len,
 233                                                     DMA_TO_DEVICE);
 234         dma_sync_single_for_device(NULL, mapped_addr, skb->len, DMA_TO_DEVICE);
 235         spin_lock(&priv->page_lock);
 236         tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
 237         tx_next = (tx + 1) % NUM_TX_DESC;
 238
 239         if ((priv->tx_skb[tx]) || (priv->tx_skb[tx_next]) ||
 240             !(priv->tx[tx].txd2 & TX_DMA_DONE) ||
 241             !(priv->tx[tx_next].txd2 & TX_DMA_DONE))
 242                 goto out;
 243
 244         priv->tx[tx].txd1 = mapped_addr;
 245         priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
 246         priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
 247         dev->stats.tx_packets++;
 248         dev->stats.tx_bytes += skb->len;
 249         priv->tx_skb[tx] = skb;
 250         wmb();
 251         ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0);
 252         spin_unlock(&priv->page_lock);
 253         return NETDEV_TX_OK;
 254
 255  out:
 256         spin_unlock(&priv->page_lock);
 257         dev->stats.tx_dropped++;
 258         kfree_skb(skb);
 259         return NETDEV_TX_OK;
 260 }
 261
 262 static void
 263 ramips_eth_rx_hw(unsigned long ptr)
 264 {
 265         struct net_device *dev = (struct net_device *) ptr;
 266         struct raeth_priv *priv = netdev_priv(dev);
 267         int rx;
 268         int max_rx = 16;
 269
 270         while (max_rx) {
 271                 struct sk_buff *rx_skb, *new_skb;
 272
 273                 rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC;
 274                 if (!(priv->rx[rx].rxd2 & RX_DMA_DONE))
 275                         break;
 276                 max_rx--;
 277
 278                 new_skb = netdev_alloc_skb(dev, MAX_RX_LENGTH + NET_IP_ALIGN);
 279                 /* Reuse the buffer on allocation failures */
 280                 if (new_skb) {
 281                         rx_skb = priv->rx_skb[rx];
 282                         skb_put(rx_skb, RX_DMA_PLEN0(priv->rx[rx].rxd2));
 283                         rx_skb->dev = dev;
 284                         rx_skb->protocol = eth_type_trans(rx_skb, dev);
 285                         rx_skb->ip_summed = CHECKSUM_NONE;
 286                         dev->stats.rx_packets++;
 287                         dev->stats.rx_bytes += rx_skb->len;
 288                         netif_rx(rx_skb);
 289
 290                         priv->rx_skb[rx] = new_skb;
 291                         skb_reserve(new_skb, NET_IP_ALIGN);
 292                         priv->rx[rx].rxd1 = dma_map_single(NULL,
 293                                                            new_skb->data,
 294                                                            MAX_RX_LENGTH,
 295                                                            DMA_FROM_DEVICE);
 296                 }
 297
 298                 priv->rx[rx].rxd2 &= ~RX_DMA_DONE;
 299                 wmb();
 300                 ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
 301         }
 302
 303         if (max_rx == 0)
 304                 tasklet_schedule(&priv->rx_tasklet);
 305         else
 306                 ramips_fe_int_enable(RAMIPS_RX_DLY_INT);
 307 }
 308
 309 static void
 310 ramips_eth_tx_housekeeping(unsigned long ptr)
 311 {
 312         struct net_device *dev = (struct net_device*)ptr;
 313         struct raeth_priv *priv = netdev_priv(dev);
 314
 315         spin_lock(&priv->page_lock);
 316         while ((priv->tx[priv->skb_free_idx].txd2 & TX_DMA_DONE) &&
 317                (priv->tx_skb[priv->skb_free_idx])) {
 318                 dev_kfree_skb_irq(priv->tx_skb[priv->skb_free_idx]);
 319                 priv->tx_skb[priv->skb_free_idx] = 0;
 320                 priv->skb_free_idx++;
 321                 if (priv->skb_free_idx >= NUM_TX_DESC)
 322                         priv->skb_free_idx = 0;
 323         }
 324         spin_unlock(&priv->page_lock);
 325
 326         ramips_fe_int_enable(RAMIPS_TX_DLY_INT);
 327 }
 328
 329 static void
 330 ramips_eth_timeout(struct net_device *dev)
 331 {
 332         struct raeth_priv *priv = netdev_priv(dev);
 333
 334         tasklet_schedule(&priv->tx_housekeeping_tasklet);
 335 }
 336
 337 static irqreturn_t
 338 ramips_eth_irq(int irq, void *dev)
 339 {
 340         struct raeth_priv *priv = netdev_priv(dev);
 341         unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS);
 342
 343         ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS);
 344
 345         if (fe_int & RAMIPS_RX_DLY_INT) {
 346                 ramips_fe_int_disable(RAMIPS_RX_DLY_INT);
 347                 tasklet_schedule(&priv->rx_tasklet);
 348         }
 349
 350         if (fe_int & RAMIPS_TX_DLY_INT) {
 351                 ramips_fe_int_disable(RAMIPS_TX_DLY_INT);
 352                 tasklet_schedule(&priv->tx_housekeeping_tasklet);
 353         }
 354
 355         return IRQ_HANDLED;
 356 }
 357
 358 static int
 359 ramips_eth_open(struct net_device *dev)
 360 {
 361         struct raeth_priv *priv = netdev_priv(dev);
 362         int err;
 363
 364         err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
 365                           dev->name, dev);
 366         if (err)
 367                 return err;
 368
 369         err = ramips_alloc_dma(priv);
 370         if (err)
 371                 goto err_free_irq;
 372
 373         ramips_hw_set_macaddr(dev->dev_addr);
 374
 375         ramips_setup_dma(priv);
 376         ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
 377                 (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
 378                 RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS),
 379                 RAMIPS_PDMA_GLO_CFG);
 380         ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) &
 381                 ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
 382                 ((priv->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
 383                 RAMIPS_FE_GLO_CFG);
 384
 385         tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
 386                      (unsigned long)dev);
 387         tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
 388
 389         ramips_setup_mdio_cfg(priv);
 390
 391         ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG);
 392         ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE);
 393         ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) &
 394                 ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff),
 395                 RAMIPS_GDMA1_FWD_CFG);
 396         ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) &
 397                 ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN),
 398                 RAMIPS_CDMA_CSG_CFG);
 399         ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG);
 400         ramips_fe_wr(1, RAMIPS_FE_RST_GL);
 401         ramips_fe_wr(0, RAMIPS_FE_RST_GL);
 402
 403         netif_start_queue(dev);
 404         return 0;
 405
 406  err_free_irq:
 407         free_irq(dev->irq, dev);
 408         return err;
 409 }
 410
 411 static int
 412 ramips_eth_stop(struct net_device *dev)
 413 {
 414         struct raeth_priv *priv = netdev_priv(dev);
 415
 416         ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) &
 417                      ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN),
 418                      RAMIPS_PDMA_GLO_CFG);
 419
 420         /* disable all interrupts in the hw */
 421         ramips_fe_wr(0, RAMIPS_FE_INT_ENABLE);
 422
 423         free_irq(dev->irq, dev);
 424         netif_stop_queue(dev);
 425         tasklet_kill(&priv->tx_housekeeping_tasklet);
 426         tasklet_kill(&priv->rx_tasklet);
 427         ramips_cleanup_dma(priv);
 428         printk(KERN_DEBUG "ramips_eth: stopped\n");
 429         return 0;
 430 }
 431
 432 static int __init
 433 ramips_eth_probe(struct net_device *dev)
 434 {
 435         struct raeth_priv *priv = netdev_priv(dev);
 436
 437         BUG_ON(!priv->plat->reset_fe);
 438         priv->plat->reset_fe();
 439         net_srandom(jiffies);
 440         memcpy(dev->dev_addr, priv->plat->mac, ETH_ALEN);
 441
 442         ether_setup(dev);
 443         dev->mtu = 1500;
 444         dev->watchdog_timeo = TX_TIMEOUT;
 445         spin_lock_init(&priv->page_lock);
 446
 447         return 0;
 448 }
 449
 450 static const struct net_device_ops ramips_eth_netdev_ops = {
 451         .ndo_init               = ramips_eth_probe,
 452         .ndo_open               = ramips_eth_open,
 453         .ndo_stop               = ramips_eth_stop,
 454         .ndo_start_xmit         = ramips_eth_hard_start_xmit,
 455         .ndo_tx_timeout         = ramips_eth_timeout,
 456         .ndo_change_mtu         = eth_change_mtu,
 457         .ndo_set_mac_address    = eth_mac_addr,
 458         .ndo_validate_addr      = eth_validate_addr,
 459 };
 460
 461 static int
 462 ramips_eth_plat_probe(struct platform_device *plat)
 463 {
 464         struct raeth_priv *priv;
 465         struct ramips_eth_platform_data *data = plat->dev.platform_data;
 466         struct resource *res;
 467         int err;
 468
 469         if (!data) {
 470                 dev_err(&plat->dev, "no platform data specified\n");
 471                 return -EINVAL;
 472         }
 473
 474         res = platform_get_resource(plat, IORESOURCE_MEM, 0);
 475         if (!res) {
 476                 dev_err(&plat->dev, "no memory resource found\n");
 477                 return -ENXIO;
 478         }
 479
 480         ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1);
 481         if (!ramips_fe_base)
 482                 return -ENOMEM;
 483
 484         ramips_dev = alloc_etherdev(sizeof(struct raeth_priv));
 485         if (!ramips_dev) {
 486                 dev_err(&plat->dev, "alloc_etherdev failed\n");
 487                 err = -ENOMEM;
 488                 goto err_unmap;
 489         }
 490
 491         strcpy(ramips_dev->name, "eth%d");
 492         ramips_dev->irq = platform_get_irq(plat, 0);
 493         if (ramips_dev->irq < 0) {
 494                 dev_err(&plat->dev, "no IRQ resource found\n");
 495                 err = -ENXIO;
 496                 goto err_free_dev;
 497         }
 498         ramips_dev->addr_len = ETH_ALEN;
 499         ramips_dev->base_addr = (unsigned long)ramips_fe_base;
 500         ramips_dev->netdev_ops = &ramips_eth_netdev_ops;
 501
 502         priv = netdev_priv(ramips_dev);
 503
 504         priv->speed = data->speed;
 505         priv->duplex = data->duplex;
 506         priv->rx_fc = data->rx_fc;
 507         priv->tx_fc = data->tx_fc;
 508         priv->plat = data;
 509
 510         err = register_netdev(ramips_dev);
 511         if (err) {
 512                 dev_err(&plat->dev, "error bringing up device\n");
 513                 goto err_free_dev;
 514         }
 515
 516         printk(KERN_DEBUG "ramips_eth: loaded\n");
 517         return 0;
 518
 519  err_free_dev:
 520         kfree(ramips_dev);
 521  err_unmap:
 522         iounmap(ramips_fe_base);
 523         return err;
 524 }
 525
 526 static int
 527 ramips_eth_plat_remove(struct platform_device *plat)
 528 {
 529         unregister_netdev(ramips_dev);
 530         free_netdev(ramips_dev);
 531         printk(KERN_DEBUG "ramips_eth: unloaded\n");
 532         return 0;
 533 }
 534
 535 static struct platform_driver ramips_eth_driver = {
 536         .probe = ramips_eth_plat_probe,
 537         .remove = ramips_eth_plat_remove,
 538         .driver = {
 539                 .name = "ramips_eth",
 540                 .owner = THIS_MODULE,
 541         },
 542 };
 543
 544 static int __init
 545 ramips_eth_init(void)
 546 {
 547         int ret;
 548
 549         ret = rt305x_esw_init();
 550         if (ret)
 551                 return ret;
 552
 553         ret = platform_driver_register(&ramips_eth_driver);
 554         if (ret) {
 555                 printk(KERN_ERR
 556                        "ramips_eth: Error registering platfom driver!\n");
 557                 goto esw_cleanup;
 558         }
 559
 560         return 0;
 561
 562 esw_cleanup:
 563         rt305x_esw_exit();
 564         return ret;
 565 }
 566
 567 static void __exit
 568 ramips_eth_cleanup(void)
 569 {
 570         platform_driver_unregister(&ramips_eth_driver);
 571         rt305x_esw_exit();
 572 }
 573
 574 module_init(ramips_eth_init);
 575 module_exit(ramips_eth_cleanup);
 576
 577 MODULE_LICENSE("GPL");
 578 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
 579 MODULE_DESCRIPTION("ethernet driver for ramips boards");