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                         dma_unmap_single(&re->netdev->dev, re->rx_dma[i],
 133                                          MAX_RX_LENGTH, DMA_FROM_DEVICE);
 134                         dev_kfree_skb_any(re->rx_skb[i]);
 135                 }
 136
 137         if (re->rx)
 138                 dma_free_coherent(&re->netdev->dev,
 139                                   NUM_RX_DESC * sizeof(struct ramips_rx_dma),
 140                                   re->rx, re->rx_desc_dma);
 141
 142         if (re->tx)
 143                 dma_free_coherent(&re->netdev->dev,
 144                                   NUM_TX_DESC * sizeof(struct ramips_tx_dma),
 145                                   re->tx, re->tx_desc_dma);
 146 }
 147
 148 static int
 149 ramips_alloc_dma(struct raeth_priv *re)
 150 {
 151         int err = -ENOMEM;
 152         int i;
 153
 154         re->skb_free_idx = 0;
 155
 156         /* setup tx ring */
 157         re->tx = dma_alloc_coherent(&re->netdev->dev,
 158                                     NUM_TX_DESC * sizeof(struct ramips_tx_dma),
 159                                     &re->tx_desc_dma, GFP_ATOMIC);
 160         if (!re->tx)
 161                 goto err_cleanup;
 162
 163         memset(re->tx, 0, NUM_TX_DESC * sizeof(struct ramips_tx_dma));
 164         for (i = 0; i < NUM_TX_DESC; i++) {
 165                 re->tx[i].txd2 = TX_DMA_LSO | TX_DMA_DONE;
 166                 re->tx[i].txd4 = TX_DMA_QN(3) | TX_DMA_PN(1);
 167         }
 168
 169         /* setup rx ring */
 170         re->rx = dma_alloc_coherent(&re->netdev->dev,
 171                                     NUM_RX_DESC * sizeof(struct ramips_rx_dma),
 172                                     &re->rx_desc_dma, GFP_ATOMIC);
 173         if (!re->rx)
 174                 goto err_cleanup;
 175
 176         memset(re->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
 177         for (i = 0; i < NUM_RX_DESC; i++) {
 178                 dma_addr_t dma_addr;
 179                 struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH +
 180                                                         NET_IP_ALIGN);
 181
 182                 if (!new_skb)
 183                         goto err_cleanup;
 184
 185                 skb_reserve(new_skb, NET_IP_ALIGN);
 186
 187                 dma_addr = dma_map_single(&re->netdev->dev, new_skb->data,
 188                                           MAX_RX_LENGTH, DMA_FROM_DEVICE);
 189                 re->rx_dma[i] = dma_addr;
 190                 re->rx[i].rxd1 = (unsigned int) re->rx_dma[i];
 191                 re->rx[i].rxd2 |= RX_DMA_LSO;
 192                 re->rx_skb[i] = new_skb;
 193         }
 194
 195         return 0;
 196
 197  err_cleanup:
 198         ramips_cleanup_dma(re);
 199         return err;
 200 }
 201
 202 static void
 203 ramips_setup_dma(struct raeth_priv *re)
 204 {
 205         ramips_fe_wr(re->tx_desc_dma, RAMIPS_TX_BASE_PTR0);
 206         ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0);
 207         ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0);
 208         ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG);
 209
 210         ramips_fe_wr(re->rx_desc_dma, RAMIPS_RX_BASE_PTR0);
 211         ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0);
 212         ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0);
 213         ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG);
 214 }
 215
 216 static int
 217 ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 218 {
 219         struct raeth_priv *priv = netdev_priv(dev);
 220         unsigned long tx;
 221         unsigned int tx_next;
 222         dma_addr_t mapped_addr;
 223
 224         if (priv->plat->min_pkt_len) {
 225                 if (skb->len < priv->plat->min_pkt_len) {
 226                         if (skb_padto(skb, priv->plat->min_pkt_len)) {
 227                                 printk(KERN_ERR
 228                                        "ramips_eth: skb_padto failed\n");
 229                                 kfree_skb(skb);
 230                                 return 0;
 231                         }
 232                         skb_put(skb, priv->plat->min_pkt_len - skb->len);
 233                 }
 234         }
 235
 236         dev->trans_start = jiffies;
 237         mapped_addr = dma_map_single(&priv->netdev->dev, skb->data, skb->len,
 238                                      DMA_TO_DEVICE);
 239
 240         spin_lock(&priv->page_lock);
 241         tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
 242         tx_next = (tx + 1) % NUM_TX_DESC;
 243
 244         if ((priv->tx_skb[tx]) || (priv->tx_skb[tx_next]) ||
 245             !(priv->tx[tx].txd2 & TX_DMA_DONE) ||
 246             !(priv->tx[tx_next].txd2 & TX_DMA_DONE))
 247                 goto out;
 248
 249         priv->tx[tx].txd1 = (unsigned int) mapped_addr;
 250         priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
 251         priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
 252         dev->stats.tx_packets++;
 253         dev->stats.tx_bytes += skb->len;
 254         priv->tx_skb[tx] = skb;
 255         wmb();
 256         ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0);
 257         spin_unlock(&priv->page_lock);
 258         return NETDEV_TX_OK;
 259
 260  out:
 261         spin_unlock(&priv->page_lock);
 262         dev->stats.tx_dropped++;
 263         kfree_skb(skb);
 264         return NETDEV_TX_OK;
 265 }
 266
 267 static void
 268 ramips_eth_rx_hw(unsigned long ptr)
 269 {
 270         struct net_device *dev = (struct net_device *) ptr;
 271         struct raeth_priv *priv = netdev_priv(dev);
 272         int rx;
 273         int max_rx = 16;
 274
 275         while (max_rx) {
 276                 struct sk_buff *rx_skb, *new_skb;
 277                 int pktlen;
 278
 279                 rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC;
 280                 if (!(priv->rx[rx].rxd2 & RX_DMA_DONE))
 281                         break;
 282                 max_rx--;
 283
 284                 rx_skb = priv->rx_skb[rx];
 285                 pktlen = RX_DMA_PLEN0(priv->rx[rx].rxd2);
 286
 287                 new_skb = netdev_alloc_skb(dev, MAX_RX_LENGTH + NET_IP_ALIGN);
 288                 /* Reuse the buffer on allocation failures */
 289                 if (new_skb) {
 290                         dma_addr_t dma_addr;
 291
 292                         dma_unmap_single(&priv->netdev->dev, priv->rx_dma[rx],
 293                                          MAX_RX_LENGTH, DMA_FROM_DEVICE);
 294
 295                         skb_put(rx_skb, pktlen);
 296                         rx_skb->dev = dev;
 297                         rx_skb->protocol = eth_type_trans(rx_skb, dev);
 298                         rx_skb->ip_summed = CHECKSUM_NONE;
 299                         dev->stats.rx_packets++;
 300                         dev->stats.rx_bytes += pktlen;
 301                         netif_rx(rx_skb);
 302
 303                         priv->rx_skb[rx] = new_skb;
 304                         skb_reserve(new_skb, NET_IP_ALIGN);
 305
 306                         dma_addr = dma_map_single(&priv->netdev->dev,
 307                                                   new_skb->data,
 308                                                   MAX_RX_LENGTH,
 309                                                   DMA_FROM_DEVICE);
 310                         priv->rx_dma[rx] = dma_addr;
 311                         priv->rx[rx].rxd1 = (unsigned int) dma_addr;
 312                 } else {
 313                         dev->stats.rx_dropped++;
 314                 }
 315
 316                 priv->rx[rx].rxd2 &= ~RX_DMA_DONE;
 317                 wmb();
 318                 ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
 319         }
 320
 321         if (max_rx == 0)
 322                 tasklet_schedule(&priv->rx_tasklet);
 323         else
 324                 ramips_fe_int_enable(RAMIPS_RX_DLY_INT);
 325 }
 326
 327 static void
 328 ramips_eth_tx_housekeeping(unsigned long ptr)
 329 {
 330         struct net_device *dev = (struct net_device*)ptr;
 331         struct raeth_priv *priv = netdev_priv(dev);
 332
 333         spin_lock(&priv->page_lock);
 334         while ((priv->tx[priv->skb_free_idx].txd2 & TX_DMA_DONE) &&
 335                (priv->tx_skb[priv->skb_free_idx])) {
 336                 dev_kfree_skb_irq(priv->tx_skb[priv->skb_free_idx]);
 337                 priv->tx_skb[priv->skb_free_idx] = 0;
 338                 priv->skb_free_idx++;
 339                 if (priv->skb_free_idx >= NUM_TX_DESC)
 340                         priv->skb_free_idx = 0;
 341         }
 342         spin_unlock(&priv->page_lock);
 343
 344         ramips_fe_int_enable(RAMIPS_TX_DLY_INT);
 345 }
 346
 347 static void
 348 ramips_eth_timeout(struct net_device *dev)
 349 {
 350         struct raeth_priv *priv = netdev_priv(dev);
 351
 352         tasklet_schedule(&priv->tx_housekeeping_tasklet);
 353 }
 354
 355 static irqreturn_t
 356 ramips_eth_irq(int irq, void *dev)
 357 {
 358         struct raeth_priv *priv = netdev_priv(dev);
 359         unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS);
 360
 361         ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS);
 362
 363         if (fe_int & RAMIPS_RX_DLY_INT) {
 364                 ramips_fe_int_disable(RAMIPS_RX_DLY_INT);
 365                 tasklet_schedule(&priv->rx_tasklet);
 366         }
 367
 368         if (fe_int & RAMIPS_TX_DLY_INT) {
 369                 ramips_fe_int_disable(RAMIPS_TX_DLY_INT);
 370                 tasklet_schedule(&priv->tx_housekeeping_tasklet);
 371         }
 372
 373         return IRQ_HANDLED;
 374 }
 375
 376 static int
 377 ramips_eth_open(struct net_device *dev)
 378 {
 379         struct raeth_priv *priv = netdev_priv(dev);
 380         int err;
 381
 382         err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
 383                           dev->name, dev);
 384         if (err)
 385                 return err;
 386
 387         err = ramips_alloc_dma(priv);
 388         if (err)
 389                 goto err_free_irq;
 390
 391         ramips_hw_set_macaddr(dev->dev_addr);
 392
 393         ramips_setup_dma(priv);
 394         ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
 395                 (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
 396                 RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS),
 397                 RAMIPS_PDMA_GLO_CFG);
 398         ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) &
 399                 ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
 400                 ((priv->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
 401                 RAMIPS_FE_GLO_CFG);
 402
 403         tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
 404                      (unsigned long)dev);
 405         tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
 406
 407         ramips_setup_mdio_cfg(priv);
 408
 409         ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG);
 410         ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE);
 411         ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) &
 412                 ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff),
 413                 RAMIPS_GDMA1_FWD_CFG);
 414         ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) &
 415                 ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN),
 416                 RAMIPS_CDMA_CSG_CFG);
 417         ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG);
 418         ramips_fe_wr(1, RAMIPS_FE_RST_GL);
 419         ramips_fe_wr(0, RAMIPS_FE_RST_GL);
 420
 421         netif_start_queue(dev);
 422         return 0;
 423
 424  err_free_irq:
 425         free_irq(dev->irq, dev);
 426         return err;
 427 }
 428
 429 static int
 430 ramips_eth_stop(struct net_device *dev)
 431 {
 432         struct raeth_priv *priv = netdev_priv(dev);
 433
 434         ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) &
 435                      ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN),
 436                      RAMIPS_PDMA_GLO_CFG);
 437
 438         /* disable all interrupts in the hw */
 439         ramips_fe_wr(0, RAMIPS_FE_INT_ENABLE);
 440
 441         free_irq(dev->irq, dev);
 442         netif_stop_queue(dev);
 443         tasklet_kill(&priv->tx_housekeeping_tasklet);
 444         tasklet_kill(&priv->rx_tasklet);
 445         ramips_cleanup_dma(priv);
 446         printk(KERN_DEBUG "ramips_eth: stopped\n");
 447         return 0;
 448 }
 449
 450 static int __init
 451 ramips_eth_probe(struct net_device *dev)
 452 {
 453         struct raeth_priv *priv = netdev_priv(dev);
 454
 455         BUG_ON(!priv->plat->reset_fe);
 456         priv->plat->reset_fe();
 457         net_srandom(jiffies);
 458         memcpy(dev->dev_addr, priv->plat->mac, ETH_ALEN);
 459
 460         ether_setup(dev);
 461         dev->mtu = 1500;
 462         dev->watchdog_timeo = TX_TIMEOUT;
 463         spin_lock_init(&priv->page_lock);
 464
 465         return 0;
 466 }
 467
 468 static const struct net_device_ops ramips_eth_netdev_ops = {
 469         .ndo_init               = ramips_eth_probe,
 470         .ndo_open               = ramips_eth_open,
 471         .ndo_stop               = ramips_eth_stop,
 472         .ndo_start_xmit         = ramips_eth_hard_start_xmit,
 473         .ndo_tx_timeout         = ramips_eth_timeout,
 474         .ndo_change_mtu         = eth_change_mtu,
 475         .ndo_set_mac_address    = eth_mac_addr,
 476         .ndo_validate_addr      = eth_validate_addr,
 477 };
 478
 479 static int
 480 ramips_eth_plat_probe(struct platform_device *plat)
 481 {
 482         struct raeth_priv *priv;
 483         struct ramips_eth_platform_data *data = plat->dev.platform_data;
 484         struct resource *res;
 485         int err;
 486
 487         if (!data) {
 488                 dev_err(&plat->dev, "no platform data specified\n");
 489                 return -EINVAL;
 490         }
 491
 492         res = platform_get_resource(plat, IORESOURCE_MEM, 0);
 493         if (!res) {
 494                 dev_err(&plat->dev, "no memory resource found\n");
 495                 return -ENXIO;
 496         }
 497
 498         ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1);
 499         if (!ramips_fe_base)
 500                 return -ENOMEM;
 501
 502         ramips_dev = alloc_etherdev(sizeof(struct raeth_priv));
 503         if (!ramips_dev) {
 504                 dev_err(&plat->dev, "alloc_etherdev failed\n");
 505                 err = -ENOMEM;
 506                 goto err_unmap;
 507         }
 508
 509         strcpy(ramips_dev->name, "eth%d");
 510         ramips_dev->irq = platform_get_irq(plat, 0);
 511         if (ramips_dev->irq < 0) {
 512                 dev_err(&plat->dev, "no IRQ resource found\n");
 513                 err = -ENXIO;
 514                 goto err_free_dev;
 515         }
 516         ramips_dev->addr_len = ETH_ALEN;
 517         ramips_dev->base_addr = (unsigned long)ramips_fe_base;
 518         ramips_dev->netdev_ops = &ramips_eth_netdev_ops;
 519
 520         priv = netdev_priv(ramips_dev);
 521
 522         priv->netdev = ramips_dev;
 523         priv->speed = data->speed;
 524         priv->duplex = data->duplex;
 525         priv->rx_fc = data->rx_fc;
 526         priv->tx_fc = data->tx_fc;
 527         priv->plat = data;
 528
 529         err = register_netdev(ramips_dev);
 530         if (err) {
 531                 dev_err(&plat->dev, "error bringing up device\n");
 532                 goto err_free_dev;
 533         }
 534
 535         printk(KERN_DEBUG "ramips_eth: loaded\n");
 536         return 0;
 537
 538  err_free_dev:
 539         kfree(ramips_dev);
 540  err_unmap:
 541         iounmap(ramips_fe_base);
 542         return err;
 543 }
 544
 545 static int
 546 ramips_eth_plat_remove(struct platform_device *plat)
 547 {
 548         unregister_netdev(ramips_dev);
 549         free_netdev(ramips_dev);
 550         printk(KERN_DEBUG "ramips_eth: unloaded\n");
 551         return 0;
 552 }
 553
 554 static struct platform_driver ramips_eth_driver = {
 555         .probe = ramips_eth_plat_probe,
 556         .remove = ramips_eth_plat_remove,
 557         .driver = {
 558                 .name = "ramips_eth",
 559                 .owner = THIS_MODULE,
 560         },
 561 };
 562
 563 static int __init
 564 ramips_eth_init(void)
 565 {
 566         int ret;
 567
 568         ret = rt305x_esw_init();
 569         if (ret)
 570                 return ret;
 571
 572         ret = platform_driver_register(&ramips_eth_driver);
 573         if (ret) {
 574                 printk(KERN_ERR
 575                        "ramips_eth: Error registering platfom driver!\n");
 576                 goto esw_cleanup;
 577         }
 578
 579         return 0;
 580
 581 esw_cleanup:
 582         rt305x_esw_exit();
 583         return ret;
 584 }
 585
 586 static void __exit
 587 ramips_eth_cleanup(void)
 588 {
 589         platform_driver_unregister(&ramips_eth_driver);
 590         rt305x_esw_exit();
 591 }
 592
 593 module_init(ramips_eth_init);
 594 module_exit(ramips_eth_cleanup);
 595
 596 MODULE_LICENSE("GPL");
 597 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
 598 MODULE_DESCRIPTION("ethernet driver for ramips boards");