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 #if defined(CONFIG_RALINK_RT288X) || defined(CONFIG_RALINK_RT3883)
  92
  93 #define RAMIPS_MDIO_RETRY       1000
  94
  95 static void
  96 ramips_setup_mdio_cfg(struct raeth_priv *re)
  97 {
  98         unsigned int mdio_cfg;
  99
 100         mdio_cfg = RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
 101                    RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 |
 102                    RAMIPS_MDIO_CFG_GP1_FRC_EN;
 103
 104         if (re->duplex == DUPLEX_FULL)
 105                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_DUPLEX;
 106
 107         if (re->tx_fc)
 108                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_TX;
 109
 110         if (re->rx_fc)
 111                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_RX;
 112
 113         switch (re->speed) {
 114         case SPEED_10:
 115                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_10;
 116                 break;
 117         case SPEED_100:
 118                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_100;
 119                 break;
 120         case SPEED_1000:
 121                 mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_1000;
 122                 break;
 123         default:
 124                 BUG();
 125         }
 126
 127         ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG);
 128 }
 129 static int
 130 ramips_mdio_wait_ready(struct raeth_priv *re)
 131 {
 132         int retries;
 133
 134         retries = RAMIPS_MDIO_RETRY;
 135         while (1) {
 136                 u32 t;
 137
 138                 t = ramips_fe_rr(RAMIPS_MDIO_ACCESS);
 139                 if ((t & (0x1 << 31)) == 0)
 140                         return 0;
 141
 142                 if (retries-- == 0)
 143                         break;
 144
 145                 udelay(1);
 146         }
 147
 148         dev_err(re->parent, "MDIO operation timed out\n");
 149         return -ETIMEDOUT;
 150 }
 151
 152 static int
 153 ramips_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg)
 154 {
 155         struct raeth_priv *re = bus->priv;
 156         int err;
 157         u32 t;
 158
 159         err = ramips_mdio_wait_ready(re);
 160         if (err)
 161                 return 0xffff;
 162
 163         t = (phy_addr << 24) | (phy_reg << 16);
 164         ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
 165         t |= (1 << 31);
 166         ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
 167
 168         err = ramips_mdio_wait_ready(re);
 169         if (err)
 170                 return 0xffff;
 171
 172         RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
 173                 phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
 174
 175         return ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff;
 176 }
 177
 178 static int
 179 ramips_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val)
 180 {
 181         struct raeth_priv *re = bus->priv;
 182         int err;
 183         u32 t;
 184
 185         RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__,
 186                 phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff);
 187
 188         err = ramips_mdio_wait_ready(re);
 189         if (err)
 190                 return err;
 191
 192         t = (1 << 30) | (phy_addr << 24) | (phy_reg << 16) | val;
 193         ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
 194         t |= (1 << 31);
 195         ramips_fe_wr(t, RAMIPS_MDIO_ACCESS);
 196
 197         return ramips_mdio_wait_ready(re);
 198 }
 199
 200 static int
 201 ramips_mdio_reset(struct mii_bus *bus)
 202 {
 203         /* TODO */
 204         return 0;
 205 }
 206
 207 static int
 208 ramips_mdio_init(struct raeth_priv *re)
 209 {
 210         int err;
 211         int i;
 212
 213         re->mii_bus = mdiobus_alloc();
 214         if (re->mii_bus == NULL)
 215                 return -ENOMEM;
 216
 217         re->mii_bus->name = "ramips_mdio";
 218         re->mii_bus->read = ramips_mdio_read;
 219         re->mii_bus->write = ramips_mdio_write;
 220         re->mii_bus->reset = ramips_mdio_reset;
 221         re->mii_bus->irq = re->mii_irq;
 222         re->mii_bus->priv = re;
 223         re->mii_bus->parent = re->parent;
 224
 225         snprintf(re->mii_bus->id, MII_BUS_ID_SIZE, "%s", "ramips_mdio");
 226         re->mii_bus->phy_mask = 0;
 227
 228         for (i = 0; i < PHY_MAX_ADDR; i++)
 229                 re->mii_irq[i] = PHY_POLL;
 230
 231         err = mdiobus_register(re->mii_bus);
 232         if (err)
 233                 goto err_free_bus;
 234
 235         return 0;
 236
 237 err_free_bus:
 238         kfree(re->mii_bus);
 239         return err;
 240 }
 241
 242 static void
 243 ramips_mdio_cleanup(struct raeth_priv *re)
 244 {
 245         mdiobus_unregister(re->mii_bus);
 246         kfree(re->mii_bus);
 247 }
 248
 249 #else
 250 static inline void
 251 ramips_setup_mdio_cfg(struct raeth_priv *re)
 252 {
 253 }
 254
 255 static inline int
 256 ramips_mdio_init(struct raeth_priv *re)
 257 {
 258         return 0;
 259 }
 260
 261 static inline void
 262 ramips_mdio_cleanup(struct raeth_priv *re)
 263 {
 264 }
 265 #endif /* CONFIG_RALINK_RT288X || CONFIG_RALINK_RT3883 */
 266
 267 static void
 268 ramips_cleanup_dma(struct raeth_priv *re)
 269 {
 270         int i;
 271
 272         for (i = 0; i < NUM_RX_DESC; i++)
 273                 if (re->rx_skb[i]) {
 274                         dma_unmap_single(&re->netdev->dev, re->rx_dma[i],
 275                                          MAX_RX_LENGTH, DMA_FROM_DEVICE);
 276                         dev_kfree_skb_any(re->rx_skb[i]);
 277                 }
 278
 279         if (re->rx)
 280                 dma_free_coherent(&re->netdev->dev,
 281                                   NUM_RX_DESC * sizeof(struct ramips_rx_dma),
 282                                   re->rx, re->rx_desc_dma);
 283
 284         if (re->tx)
 285                 dma_free_coherent(&re->netdev->dev,
 286                                   NUM_TX_DESC * sizeof(struct ramips_tx_dma),
 287                                   re->tx, re->tx_desc_dma);
 288 }
 289
 290 static int
 291 ramips_alloc_dma(struct raeth_priv *re)
 292 {
 293         int err = -ENOMEM;
 294         int i;
 295
 296         re->skb_free_idx = 0;
 297
 298         /* setup tx ring */
 299         re->tx = dma_alloc_coherent(&re->netdev->dev,
 300                                     NUM_TX_DESC * sizeof(struct ramips_tx_dma),
 301                                     &re->tx_desc_dma, GFP_ATOMIC);
 302         if (!re->tx)
 303                 goto err_cleanup;
 304
 305         memset(re->tx, 0, NUM_TX_DESC * sizeof(struct ramips_tx_dma));
 306         for (i = 0; i < NUM_TX_DESC; i++) {
 307                 re->tx[i].txd2 = TX_DMA_LSO | TX_DMA_DONE;
 308                 re->tx[i].txd4 = TX_DMA_QN(3) | TX_DMA_PN(1);
 309         }
 310
 311         /* setup rx ring */
 312         re->rx = dma_alloc_coherent(&re->netdev->dev,
 313                                     NUM_RX_DESC * sizeof(struct ramips_rx_dma),
 314                                     &re->rx_desc_dma, GFP_ATOMIC);
 315         if (!re->rx)
 316                 goto err_cleanup;
 317
 318         memset(re->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
 319         for (i = 0; i < NUM_RX_DESC; i++) {
 320                 dma_addr_t dma_addr;
 321                 struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH +
 322                                                         NET_IP_ALIGN);
 323
 324                 if (!new_skb)
 325                         goto err_cleanup;
 326
 327                 skb_reserve(new_skb, NET_IP_ALIGN);
 328
 329                 dma_addr = dma_map_single(&re->netdev->dev, new_skb->data,
 330                                           MAX_RX_LENGTH, DMA_FROM_DEVICE);
 331                 re->rx_dma[i] = dma_addr;
 332                 re->rx[i].rxd1 = (unsigned int) re->rx_dma[i];
 333                 re->rx[i].rxd2 |= RX_DMA_LSO;
 334                 re->rx_skb[i] = new_skb;
 335         }
 336
 337         return 0;
 338
 339  err_cleanup:
 340         ramips_cleanup_dma(re);
 341         return err;
 342 }
 343
 344 static void
 345 ramips_setup_dma(struct raeth_priv *re)
 346 {
 347         ramips_fe_wr(re->tx_desc_dma, RAMIPS_TX_BASE_PTR0);
 348         ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0);
 349         ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0);
 350         ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG);
 351
 352         ramips_fe_wr(re->rx_desc_dma, RAMIPS_RX_BASE_PTR0);
 353         ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0);
 354         ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0);
 355         ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG);
 356 }
 357
 358 static int
 359 ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 360 {
 361         struct raeth_priv *priv = netdev_priv(dev);
 362         unsigned long tx;
 363         unsigned int tx_next;
 364         dma_addr_t mapped_addr;
 365
 366         if (priv->plat->min_pkt_len) {
 367                 if (skb->len < priv->plat->min_pkt_len) {
 368                         if (skb_padto(skb, priv->plat->min_pkt_len)) {
 369                                 printk(KERN_ERR
 370                                        "ramips_eth: skb_padto failed\n");
 371                                 kfree_skb(skb);
 372                                 return 0;
 373                         }
 374                         skb_put(skb, priv->plat->min_pkt_len - skb->len);
 375                 }
 376         }
 377
 378         dev->trans_start = jiffies;
 379         mapped_addr = dma_map_single(&priv->netdev->dev, skb->data, skb->len,
 380                                      DMA_TO_DEVICE);
 381
 382         spin_lock(&priv->page_lock);
 383         tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
 384         tx_next = (tx + 1) % NUM_TX_DESC;
 385
 386         if ((priv->tx_skb[tx]) || (priv->tx_skb[tx_next]) ||
 387             !(priv->tx[tx].txd2 & TX_DMA_DONE) ||
 388             !(priv->tx[tx_next].txd2 & TX_DMA_DONE))
 389                 goto out;
 390
 391         priv->tx[tx].txd1 = (unsigned int) mapped_addr;
 392         priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
 393         priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
 394         dev->stats.tx_packets++;
 395         dev->stats.tx_bytes += skb->len;
 396         priv->tx_skb[tx] = skb;
 397         wmb();
 398         ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0);
 399         spin_unlock(&priv->page_lock);
 400         return NETDEV_TX_OK;
 401
 402  out:
 403         spin_unlock(&priv->page_lock);
 404         dev->stats.tx_dropped++;
 405         kfree_skb(skb);
 406         return NETDEV_TX_OK;
 407 }
 408
 409 static void
 410 ramips_eth_rx_hw(unsigned long ptr)
 411 {
 412         struct net_device *dev = (struct net_device *) ptr;
 413         struct raeth_priv *priv = netdev_priv(dev);
 414         int rx;
 415         int max_rx = 16;
 416
 417         while (max_rx) {
 418                 struct sk_buff *rx_skb, *new_skb;
 419                 int pktlen;
 420
 421                 rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC;
 422                 if (!(priv->rx[rx].rxd2 & RX_DMA_DONE))
 423                         break;
 424                 max_rx--;
 425
 426                 rx_skb = priv->rx_skb[rx];
 427                 pktlen = RX_DMA_PLEN0(priv->rx[rx].rxd2);
 428
 429                 new_skb = netdev_alloc_skb(dev, MAX_RX_LENGTH + NET_IP_ALIGN);
 430                 /* Reuse the buffer on allocation failures */
 431                 if (new_skb) {
 432                         dma_addr_t dma_addr;
 433
 434                         dma_unmap_single(&priv->netdev->dev, priv->rx_dma[rx],
 435                                          MAX_RX_LENGTH, DMA_FROM_DEVICE);
 436
 437                         skb_put(rx_skb, pktlen);
 438                         rx_skb->dev = dev;
 439                         rx_skb->protocol = eth_type_trans(rx_skb, dev);
 440                         rx_skb->ip_summed = CHECKSUM_NONE;
 441                         dev->stats.rx_packets++;
 442                         dev->stats.rx_bytes += pktlen;
 443                         netif_rx(rx_skb);
 444
 445                         priv->rx_skb[rx] = new_skb;
 446                         skb_reserve(new_skb, NET_IP_ALIGN);
 447
 448                         dma_addr = dma_map_single(&priv->netdev->dev,
 449                                                   new_skb->data,
 450                                                   MAX_RX_LENGTH,
 451                                                   DMA_FROM_DEVICE);
 452                         priv->rx_dma[rx] = dma_addr;
 453                         priv->rx[rx].rxd1 = (unsigned int) dma_addr;
 454                 } else {
 455                         dev->stats.rx_dropped++;
 456                 }
 457
 458                 priv->rx[rx].rxd2 &= ~RX_DMA_DONE;
 459                 wmb();
 460                 ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
 461         }
 462
 463         if (max_rx == 0)
 464                 tasklet_schedule(&priv->rx_tasklet);
 465         else
 466                 ramips_fe_int_enable(RAMIPS_RX_DLY_INT);
 467 }
 468
 469 static void
 470 ramips_eth_tx_housekeeping(unsigned long ptr)
 471 {
 472         struct net_device *dev = (struct net_device*)ptr;
 473         struct raeth_priv *priv = netdev_priv(dev);
 474
 475         spin_lock(&priv->page_lock);
 476         while ((priv->tx[priv->skb_free_idx].txd2 & TX_DMA_DONE) &&
 477                (priv->tx_skb[priv->skb_free_idx])) {
 478                 dev_kfree_skb_irq(priv->tx_skb[priv->skb_free_idx]);
 479                 priv->tx_skb[priv->skb_free_idx] = 0;
 480                 priv->skb_free_idx++;
 481                 if (priv->skb_free_idx >= NUM_TX_DESC)
 482                         priv->skb_free_idx = 0;
 483         }
 484         spin_unlock(&priv->page_lock);
 485
 486         ramips_fe_int_enable(RAMIPS_TX_DLY_INT);
 487 }
 488
 489 static void
 490 ramips_eth_timeout(struct net_device *dev)
 491 {
 492         struct raeth_priv *priv = netdev_priv(dev);
 493
 494         tasklet_schedule(&priv->tx_housekeeping_tasklet);
 495 }
 496
 497 static irqreturn_t
 498 ramips_eth_irq(int irq, void *dev)
 499 {
 500         struct raeth_priv *priv = netdev_priv(dev);
 501         unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS);
 502
 503         ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS);
 504
 505         if (fe_int & RAMIPS_RX_DLY_INT) {
 506                 ramips_fe_int_disable(RAMIPS_RX_DLY_INT);
 507                 tasklet_schedule(&priv->rx_tasklet);
 508         }
 509
 510         if (fe_int & RAMIPS_TX_DLY_INT) {
 511                 ramips_fe_int_disable(RAMIPS_TX_DLY_INT);
 512                 tasklet_schedule(&priv->tx_housekeeping_tasklet);
 513         }
 514
 515         return IRQ_HANDLED;
 516 }
 517
 518 static int
 519 ramips_eth_open(struct net_device *dev)
 520 {
 521         struct raeth_priv *priv = netdev_priv(dev);
 522         int err;
 523
 524         err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
 525                           dev->name, dev);
 526         if (err)
 527                 return err;
 528
 529         err = ramips_alloc_dma(priv);
 530         if (err)
 531                 goto err_free_irq;
 532
 533         ramips_hw_set_macaddr(dev->dev_addr);
 534
 535         ramips_setup_dma(priv);
 536         ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
 537                 (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
 538                 RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS),
 539                 RAMIPS_PDMA_GLO_CFG);
 540         ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) &
 541                 ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
 542                 ((priv->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
 543                 RAMIPS_FE_GLO_CFG);
 544
 545         tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
 546                      (unsigned long)dev);
 547         tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
 548
 549         ramips_setup_mdio_cfg(priv);
 550
 551         ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG);
 552         ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE);
 553         ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) &
 554                 ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff),
 555                 RAMIPS_GDMA1_FWD_CFG);
 556         ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) &
 557                 ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN),
 558                 RAMIPS_CDMA_CSG_CFG);
 559         ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG);
 560         ramips_fe_wr(1, RAMIPS_FE_RST_GL);
 561         ramips_fe_wr(0, RAMIPS_FE_RST_GL);
 562
 563         netif_start_queue(dev);
 564         return 0;
 565
 566  err_free_irq:
 567         free_irq(dev->irq, dev);
 568         return err;
 569 }
 570
 571 static int
 572 ramips_eth_stop(struct net_device *dev)
 573 {
 574         struct raeth_priv *priv = netdev_priv(dev);
 575
 576         ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) &
 577                      ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN),
 578                      RAMIPS_PDMA_GLO_CFG);
 579
 580         /* disable all interrupts in the hw */
 581         ramips_fe_wr(0, RAMIPS_FE_INT_ENABLE);
 582
 583         free_irq(dev->irq, dev);
 584         netif_stop_queue(dev);
 585         tasklet_kill(&priv->tx_housekeeping_tasklet);
 586         tasklet_kill(&priv->rx_tasklet);
 587         ramips_cleanup_dma(priv);
 588         RADEBUG("ramips_eth: stopped\n");
 589         return 0;
 590 }
 591
 592 static int __init
 593 ramips_eth_probe(struct net_device *dev)
 594 {
 595         struct raeth_priv *priv = netdev_priv(dev);
 596         int err;
 597
 598         BUG_ON(!priv->plat->reset_fe);
 599         priv->plat->reset_fe();
 600         net_srandom(jiffies);
 601         memcpy(dev->dev_addr, priv->plat->mac, ETH_ALEN);
 602
 603         ether_setup(dev);
 604         dev->mtu = 1500;
 605         dev->watchdog_timeo = TX_TIMEOUT;
 606         spin_lock_init(&priv->page_lock);
 607
 608         err = ramips_mdio_init(priv);
 609         return err;
 610 }
 611
 612 static void
 613 ramips_eth_uninit(struct net_device *dev)
 614 {
 615         struct raeth_priv *re = netdev_priv(dev);
 616
 617         ramips_mdio_cleanup(re);
 618 }
 619
 620 static const struct net_device_ops ramips_eth_netdev_ops = {
 621         .ndo_init               = ramips_eth_probe,
 622         .ndo_uninit             = ramips_eth_uninit,
 623         .ndo_open               = ramips_eth_open,
 624         .ndo_stop               = ramips_eth_stop,
 625         .ndo_start_xmit         = ramips_eth_hard_start_xmit,
 626         .ndo_tx_timeout         = ramips_eth_timeout,
 627         .ndo_change_mtu         = eth_change_mtu,
 628         .ndo_set_mac_address    = eth_mac_addr,
 629         .ndo_validate_addr      = eth_validate_addr,
 630 };
 631
 632 static int
 633 ramips_eth_plat_probe(struct platform_device *plat)
 634 {
 635         struct raeth_priv *priv;
 636         struct ramips_eth_platform_data *data = plat->dev.platform_data;
 637         struct resource *res;
 638         int err;
 639
 640         if (!data) {
 641                 dev_err(&plat->dev, "no platform data specified\n");
 642                 return -EINVAL;
 643         }
 644
 645         res = platform_get_resource(plat, IORESOURCE_MEM, 0);
 646         if (!res) {
 647                 dev_err(&plat->dev, "no memory resource found\n");
 648                 return -ENXIO;
 649         }
 650
 651         ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1);
 652         if (!ramips_fe_base)
 653                 return -ENOMEM;
 654
 655         ramips_dev = alloc_etherdev(sizeof(struct raeth_priv));
 656         if (!ramips_dev) {
 657                 dev_err(&plat->dev, "alloc_etherdev failed\n");
 658                 err = -ENOMEM;
 659                 goto err_unmap;
 660         }
 661
 662         strcpy(ramips_dev->name, "eth%d");
 663         ramips_dev->irq = platform_get_irq(plat, 0);
 664         if (ramips_dev->irq < 0) {
 665                 dev_err(&plat->dev, "no IRQ resource found\n");
 666                 err = -ENXIO;
 667                 goto err_free_dev;
 668         }
 669         ramips_dev->addr_len = ETH_ALEN;
 670         ramips_dev->base_addr = (unsigned long)ramips_fe_base;
 671         ramips_dev->netdev_ops = &ramips_eth_netdev_ops;
 672
 673         priv = netdev_priv(ramips_dev);
 674
 675         priv->netdev = ramips_dev;
 676         priv->parent = &plat->dev;
 677         priv->speed = data->speed;
 678         priv->duplex = data->duplex;
 679         priv->rx_fc = data->rx_fc;
 680         priv->tx_fc = data->tx_fc;
 681         priv->plat = data;
 682
 683         err = register_netdev(ramips_dev);
 684         if (err) {
 685                 dev_err(&plat->dev, "error bringing up device\n");
 686                 goto err_free_dev;
 687         }
 688
 689         RADEBUG("ramips_eth: loaded\n");
 690         return 0;
 691
 692  err_free_dev:
 693         kfree(ramips_dev);
 694  err_unmap:
 695         iounmap(ramips_fe_base);
 696         return err;
 697 }
 698
 699 static int
 700 ramips_eth_plat_remove(struct platform_device *plat)
 701 {
 702         unregister_netdev(ramips_dev);
 703         free_netdev(ramips_dev);
 704         RADEBUG("ramips_eth: unloaded\n");
 705         return 0;
 706 }
 707
 708 static struct platform_driver ramips_eth_driver = {
 709         .probe = ramips_eth_plat_probe,
 710         .remove = ramips_eth_plat_remove,
 711         .driver = {
 712                 .name = "ramips_eth",
 713                 .owner = THIS_MODULE,
 714         },
 715 };
 716
 717 static int __init
 718 ramips_eth_init(void)
 719 {
 720         int ret;
 721
 722         ret = rt305x_esw_init();
 723         if (ret)
 724                 return ret;
 725
 726         ret = platform_driver_register(&ramips_eth_driver);
 727         if (ret) {
 728                 printk(KERN_ERR
 729                        "ramips_eth: Error registering platfom driver!\n");
 730                 goto esw_cleanup;
 731         }
 732
 733         return 0;
 734
 735 esw_cleanup:
 736         rt305x_esw_exit();
 737         return ret;
 738 }
 739
 740 static void __exit
 741 ramips_eth_cleanup(void)
 742 {
 743         platform_driver_unregister(&ramips_eth_driver);
 744         rt305x_esw_exit();
 745 }
 746
 747 module_init(ramips_eth_init);
 748 module_exit(ramips_eth_cleanup);
 749
 750 MODULE_LICENSE("GPL");
 751 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
 752 MODULE_DESCRIPTION("ethernet driver for ramips boards");