1 /* 2 * This program is free software; you can redistribute it and/or modify it 3 * under the terms of the GNU General Public License version 2 as published 4 * by the Free Software Foundation. 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, see <http://www.gnu.org/licenses/>. 13 * 14 * Copyright (C) 2011 John Crispin <blogic@openwrt.org> 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/slab.h> 19 #include <linux/errno.h> 20 #include <linux/types.h> 21 #include <linux/interrupt.h> 22 #include <linux/uaccess.h> 23 #include <linux/in.h> 24 #include <linux/netdevice.h> 25 #include <linux/etherdevice.h> 26 #include <linux/phy.h> 27 #include <linux/ip.h> 28 #include <linux/tcp.h> 29 #include <linux/skbuff.h> 30 #include <linux/mm.h> 31 #include <linux/platform_device.h> 32 #include <linux/ethtool.h> 33 #include <linux/init.h> 34 #include <linux/delay.h> 35 #include <linux/io.h> 36 #include <linux/dma-mapping.h> 37 #include <linux/module.h> 38 39 #include <asm/checksum.h> 40 41 #include <lantiq_soc.h> 42 #include <xway_dma.h> 43 #include <lantiq_platform.h> 44 45 #define LTQ_ETOP_MDIO 0x11804 46 #define MDIO_REQUEST 0x80000000 47 #define MDIO_READ 0x40000000 48 #define MDIO_ADDR_MASK 0x1f 49 #define MDIO_ADDR_OFFSET 0x15 50 #define MDIO_REG_MASK 0x1f 51 #define MDIO_REG_OFFSET 0x10 52 #define MDIO_VAL_MASK 0xffff 53 54 #define PPE32_CGEN 0x800 55 #define LQ_PPE32_ENET_MAC_CFG 0x1840 56 57 #define LTQ_ETOP_ENETS0 0x11850 58 #define LTQ_ETOP_MAC_DA0 0x1186C 59 #define LTQ_ETOP_MAC_DA1 0x11870 60 #define LTQ_ETOP_CFG 0x16020 61 #define LTQ_ETOP_IGPLEN 0x16080 62 63 #define MAX_DMA_CHAN 0x8 64 #define MAX_DMA_CRC_LEN 0x4 65 #define MAX_DMA_DATA_LEN 0x600 66 67 #define ETOP_FTCU BIT(28) 68 #define ETOP_MII_MASK 0xf 69 #define ETOP_MII_NORMAL 0xd 70 #define ETOP_MII_REVERSE 0xe 71 #define ETOP_PLEN_UNDER 0x40 72 #define ETOP_CGEN 0x800 73 74 /* use 2 static channels for TX/RX */ 75 #define LTQ_ETOP_TX_CHANNEL 1 76 #define LTQ_ETOP_RX_CHANNEL 6 77 #define IS_TX(x) (x == LTQ_ETOP_TX_CHANNEL) 78 #define IS_RX(x) (x == LTQ_ETOP_RX_CHANNEL) 79 80 #define ltq_etop_r32(x) ltq_r32(ltq_etop_membase + (x)) 81 #define ltq_etop_w32(x, y) ltq_w32(x, ltq_etop_membase + (y)) 82 #define ltq_etop_w32_mask(x, y, z) \ 83 ltq_w32_mask(x, y, ltq_etop_membase + (z)) 84 85 #define DRV_VERSION "1.0" 86 87 static void __iomem *ltq_etop_membase; 88 89 struct ltq_etop_chan { 90 int idx; 91 int tx_free; 92 struct net_device *netdev; 93 struct napi_struct napi; 94 struct ltq_dma_channel dma; 95 struct sk_buff *skb[LTQ_DESC_NUM]; 96 }; 97 98 struct ltq_etop_priv { 99 struct net_device *netdev; 100 struct platform_device *pdev; 101 struct ltq_eth_data *pldata; 102 struct resource *res; 103 104 struct mii_bus *mii_bus; 105 106 struct ltq_etop_chan ch[MAX_DMA_CHAN]; 107 int tx_free[MAX_DMA_CHAN >> 1]; 108 109 spinlock_t lock; 110 }; 111 112 static int 113 ltq_etop_alloc_skb(struct ltq_etop_chan *ch) 114 { 115 ch->skb[ch->dma.desc] = netdev_alloc_skb(ch->netdev, MAX_DMA_DATA_LEN); 116 if (!ch->skb[ch->dma.desc]) 117 return -ENOMEM; 118 ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(NULL, 119 ch->skb[ch->dma.desc]->data, MAX_DMA_DATA_LEN, 120 DMA_FROM_DEVICE); 121 ch->dma.desc_base[ch->dma.desc].addr = 122 CPHYSADDR(ch->skb[ch->dma.desc]->data); 123 ch->dma.desc_base[ch->dma.desc].ctl = 124 LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | 125 MAX_DMA_DATA_LEN; 126 skb_reserve(ch->skb[ch->dma.desc], NET_IP_ALIGN); 127 return 0; 128 } 129 130 static void 131 ltq_etop_hw_receive(struct ltq_etop_chan *ch) 132 { 133 struct ltq_etop_priv *priv = netdev_priv(ch->netdev); 134 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; 135 struct sk_buff *skb = ch->skb[ch->dma.desc]; 136 int len = (desc->ctl & LTQ_DMA_SIZE_MASK) - MAX_DMA_CRC_LEN; 137 unsigned long flags; 138 139 spin_lock_irqsave(&priv->lock, flags); 140 if (ltq_etop_alloc_skb(ch)) { 141 netdev_err(ch->netdev, 142 "failed to allocate new rx buffer, stopping DMA\n"); 143 ltq_dma_close(&ch->dma); 144 } 145 ch->dma.desc++; 146 ch->dma.desc %= LTQ_DESC_NUM; 147 spin_unlock_irqrestore(&priv->lock, flags); 148 149 skb_put(skb, len); 150 skb->protocol = eth_type_trans(skb, ch->netdev); 151 netif_receive_skb(skb); 152 } 153 154 static int 155 ltq_etop_poll_rx(struct napi_struct *napi, int budget) 156 { 157 struct ltq_etop_chan *ch = container_of(napi, 158 struct ltq_etop_chan, napi); 159 int rx = 0; 160 int complete = 0; 161 162 while ((rx < budget) && !complete) { 163 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; 164 165 if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) { 166 ltq_etop_hw_receive(ch); 167 rx++; 168 } else { 169 complete = 1; 170 } 171 } 172 if (complete || !rx) { 173 napi_complete(&ch->napi); 174 ltq_dma_ack_irq(&ch->dma); 175 } 176 return rx; 177 } 178 179 static int 180 ltq_etop_poll_tx(struct napi_struct *napi, int budget) 181 { 182 struct ltq_etop_chan *ch = 183 container_of(napi, struct ltq_etop_chan, napi); 184 struct ltq_etop_priv *priv = netdev_priv(ch->netdev); 185 struct netdev_queue *txq = 186 netdev_get_tx_queue(ch->netdev, ch->idx >> 1); 187 unsigned long flags; 188 189 spin_lock_irqsave(&priv->lock, flags); 190 while ((ch->dma.desc_base[ch->tx_free].ctl & 191 (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) { 192 dev_kfree_skb_any(ch->skb[ch->tx_free]); 193 ch->skb[ch->tx_free] = NULL; 194 memset(&ch->dma.desc_base[ch->tx_free], 0, 195 sizeof(struct ltq_dma_desc)); 196 ch->tx_free++; 197 ch->tx_free %= LTQ_DESC_NUM; 198 } 199 spin_unlock_irqrestore(&priv->lock, flags); 200 201 if (netif_tx_queue_stopped(txq)) 202 netif_tx_start_queue(txq); 203 napi_complete(&ch->napi); 204 ltq_dma_ack_irq(&ch->dma); 205 return 1; 206 } 207 208 static irqreturn_t 209 ltq_etop_dma_irq(int irq, void *_priv) 210 { 211 struct ltq_etop_priv *priv = _priv; 212 int ch = irq - LTQ_DMA_CH0_INT; 213 214 napi_schedule(&priv->ch[ch].napi); 215 return IRQ_HANDLED; 216 } 217 218 static void 219 ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch) 220 { 221 struct ltq_etop_priv *priv = netdev_priv(dev); 222 223 ltq_dma_free(&ch->dma); 224 if (ch->dma.irq) 225 free_irq(ch->dma.irq, priv); 226 if (IS_RX(ch->idx)) { 227 int desc; 228 for (desc = 0; desc < LTQ_DESC_NUM; desc++) 229 dev_kfree_skb_any(ch->skb[ch->dma.desc]); 230 } 231 } 232 233 static void 234 ltq_etop_hw_exit(struct net_device *dev) 235 { 236 struct ltq_etop_priv *priv = netdev_priv(dev); 237 int i; 238 239 ltq_pmu_disable(PMU_PPE); 240 for (i = 0; i < MAX_DMA_CHAN; i++) 241 if (IS_TX(i) || IS_RX(i)) 242 ltq_etop_free_channel(dev, &priv->ch[i]); 243 } 244 245 static int 246 ltq_etop_hw_init(struct net_device *dev) 247 { 248 struct ltq_etop_priv *priv = netdev_priv(dev); 249 int i; 250 251 ltq_pmu_enable(PMU_PPE); 252 253 switch (priv->pldata->mii_mode) { 254 case PHY_INTERFACE_MODE_RMII: 255 ltq_etop_w32_mask(ETOP_MII_MASK, 256 ETOP_MII_REVERSE, LTQ_ETOP_CFG); 257 break; 258 259 case PHY_INTERFACE_MODE_MII: 260 ltq_etop_w32_mask(ETOP_MII_MASK, 261 ETOP_MII_NORMAL, LTQ_ETOP_CFG); 262 break; 263 264 default: 265 netdev_err(dev, "unknown mii mode %d\n", 266 priv->pldata->mii_mode); 267 return -ENOTSUPP; 268 } 269 270 /* enable crc generation */ 271 ltq_etop_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG); 272 273 ltq_dma_init_port(DMA_PORT_ETOP); 274 275 for (i = 0; i < MAX_DMA_CHAN; i++) { 276 int irq = LTQ_DMA_CH0_INT + i; 277 struct ltq_etop_chan *ch = &priv->ch[i]; 278 279 ch->idx = ch->dma.nr = i; 280 281 if (IS_TX(i)) { 282 ltq_dma_alloc_tx(&ch->dma); 283 request_irq(irq, ltq_etop_dma_irq, 0, "etop_tx", priv); 284 } else if (IS_RX(i)) { 285 ltq_dma_alloc_rx(&ch->dma); 286 for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM; 287 ch->dma.desc++) 288 if (ltq_etop_alloc_skb(ch)) 289 return -ENOMEM; 290 ch->dma.desc = 0; 291 request_irq(irq, ltq_etop_dma_irq, 0, "etop_rx", priv); 292 } 293 ch->dma.irq = irq; 294 } 295 return 0; 296 } 297 298 static void 299 ltq_etop_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 300 { 301 strlcpy(info->driver, "Lantiq ETOP", sizeof(info->driver)); 302 strlcpy(info->bus_info, "internal", sizeof(info->bus_info)); 303 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 304 } 305 306 static int 307 ltq_etop_nway_reset(struct net_device *dev) 308 { 309 return phy_start_aneg(dev->phydev); 310 } 311 312 static const struct ethtool_ops ltq_etop_ethtool_ops = { 313 .get_drvinfo = ltq_etop_get_drvinfo, 314 .nway_reset = ltq_etop_nway_reset, 315 .get_link_ksettings = phy_ethtool_get_link_ksettings, 316 .set_link_ksettings = phy_ethtool_set_link_ksettings, 317 }; 318 319 static int 320 ltq_etop_mdio_wr(struct mii_bus *bus, int phy_addr, int phy_reg, u16 phy_data) 321 { 322 u32 val = MDIO_REQUEST | 323 ((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) | 324 ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET) | 325 phy_data; 326 327 while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST) 328 ; 329 ltq_etop_w32(val, LTQ_ETOP_MDIO); 330 return 0; 331 } 332 333 static int 334 ltq_etop_mdio_rd(struct mii_bus *bus, int phy_addr, int phy_reg) 335 { 336 u32 val = MDIO_REQUEST | MDIO_READ | 337 ((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) | 338 ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET); 339 340 while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST) 341 ; 342 ltq_etop_w32(val, LTQ_ETOP_MDIO); 343 while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST) 344 ; 345 val = ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_VAL_MASK; 346 return val; 347 } 348 349 static void 350 ltq_etop_mdio_link(struct net_device *dev) 351 { 352 /* nothing to do */ 353 } 354 355 static int 356 ltq_etop_mdio_probe(struct net_device *dev) 357 { 358 struct ltq_etop_priv *priv = netdev_priv(dev); 359 struct phy_device *phydev; 360 361 phydev = phy_find_first(priv->mii_bus); 362 363 if (!phydev) { 364 netdev_err(dev, "no PHY found\n"); 365 return -ENODEV; 366 } 367 368 phydev = phy_connect(dev, phydev_name(phydev), 369 <q_etop_mdio_link, priv->pldata->mii_mode); 370 371 if (IS_ERR(phydev)) { 372 netdev_err(dev, "Could not attach to PHY\n"); 373 return PTR_ERR(phydev); 374 } 375 376 phydev->supported &= (SUPPORTED_10baseT_Half 377 | SUPPORTED_10baseT_Full 378 | SUPPORTED_100baseT_Half 379 | SUPPORTED_100baseT_Full 380 | SUPPORTED_Autoneg 381 | SUPPORTED_MII 382 | SUPPORTED_TP); 383 384 phydev->advertising = phydev->supported; 385 phy_attached_info(phydev); 386 387 return 0; 388 } 389 390 static int 391 ltq_etop_mdio_init(struct net_device *dev) 392 { 393 struct ltq_etop_priv *priv = netdev_priv(dev); 394 int err; 395 396 priv->mii_bus = mdiobus_alloc(); 397 if (!priv->mii_bus) { 398 netdev_err(dev, "failed to allocate mii bus\n"); 399 err = -ENOMEM; 400 goto err_out; 401 } 402 403 priv->mii_bus->priv = dev; 404 priv->mii_bus->read = ltq_etop_mdio_rd; 405 priv->mii_bus->write = ltq_etop_mdio_wr; 406 priv->mii_bus->name = "ltq_mii"; 407 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 408 priv->pdev->name, priv->pdev->id); 409 if (mdiobus_register(priv->mii_bus)) { 410 err = -ENXIO; 411 goto err_out_free_mdiobus; 412 } 413 414 if (ltq_etop_mdio_probe(dev)) { 415 err = -ENXIO; 416 goto err_out_unregister_bus; 417 } 418 return 0; 419 420 err_out_unregister_bus: 421 mdiobus_unregister(priv->mii_bus); 422 err_out_free_mdiobus: 423 mdiobus_free(priv->mii_bus); 424 err_out: 425 return err; 426 } 427 428 static void 429 ltq_etop_mdio_cleanup(struct net_device *dev) 430 { 431 struct ltq_etop_priv *priv = netdev_priv(dev); 432 433 phy_disconnect(dev->phydev); 434 mdiobus_unregister(priv->mii_bus); 435 mdiobus_free(priv->mii_bus); 436 } 437 438 static int 439 ltq_etop_open(struct net_device *dev) 440 { 441 struct ltq_etop_priv *priv = netdev_priv(dev); 442 int i; 443 444 for (i = 0; i < MAX_DMA_CHAN; i++) { 445 struct ltq_etop_chan *ch = &priv->ch[i]; 446 447 if (!IS_TX(i) && (!IS_RX(i))) 448 continue; 449 ltq_dma_open(&ch->dma); 450 napi_enable(&ch->napi); 451 } 452 phy_start(dev->phydev); 453 netif_tx_start_all_queues(dev); 454 return 0; 455 } 456 457 static int 458 ltq_etop_stop(struct net_device *dev) 459 { 460 struct ltq_etop_priv *priv = netdev_priv(dev); 461 int i; 462 463 netif_tx_stop_all_queues(dev); 464 phy_stop(dev->phydev); 465 for (i = 0; i < MAX_DMA_CHAN; i++) { 466 struct ltq_etop_chan *ch = &priv->ch[i]; 467 468 if (!IS_RX(i) && !IS_TX(i)) 469 continue; 470 napi_disable(&ch->napi); 471 ltq_dma_close(&ch->dma); 472 } 473 return 0; 474 } 475 476 static int 477 ltq_etop_tx(struct sk_buff *skb, struct net_device *dev) 478 { 479 int queue = skb_get_queue_mapping(skb); 480 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue); 481 struct ltq_etop_priv *priv = netdev_priv(dev); 482 struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1]; 483 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; 484 int len; 485 unsigned long flags; 486 u32 byte_offset; 487 488 len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; 489 490 if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) { 491 dev_kfree_skb_any(skb); 492 netdev_err(dev, "tx ring full\n"); 493 netif_tx_stop_queue(txq); 494 return NETDEV_TX_BUSY; 495 } 496 497 /* dma needs to start on a 16 byte aligned address */ 498 byte_offset = CPHYSADDR(skb->data) % 16; 499 ch->skb[ch->dma.desc] = skb; 500 501 netif_trans_update(dev); 502 503 spin_lock_irqsave(&priv->lock, flags); 504 desc->addr = ((unsigned int) dma_map_single(NULL, skb->data, len, 505 DMA_TO_DEVICE)) - byte_offset; 506 wmb(); 507 desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP | 508 LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK); 509 ch->dma.desc++; 510 ch->dma.desc %= LTQ_DESC_NUM; 511 spin_unlock_irqrestore(&priv->lock, flags); 512 513 if (ch->dma.desc_base[ch->dma.desc].ctl & LTQ_DMA_OWN) 514 netif_tx_stop_queue(txq); 515 516 return NETDEV_TX_OK; 517 } 518 519 static int 520 ltq_etop_change_mtu(struct net_device *dev, int new_mtu) 521 { 522 struct ltq_etop_priv *priv = netdev_priv(dev); 523 unsigned long flags; 524 525 dev->mtu = new_mtu; 526 527 spin_lock_irqsave(&priv->lock, flags); 528 ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu, LTQ_ETOP_IGPLEN); 529 spin_unlock_irqrestore(&priv->lock, flags); 530 531 return 0; 532 } 533 534 static int 535 ltq_etop_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 536 { 537 /* TODO: mii-toll reports "No MII transceiver present!." ?!*/ 538 return phy_mii_ioctl(dev->phydev, rq, cmd); 539 } 540 541 static int 542 ltq_etop_set_mac_address(struct net_device *dev, void *p) 543 { 544 int ret = eth_mac_addr(dev, p); 545 546 if (!ret) { 547 struct ltq_etop_priv *priv = netdev_priv(dev); 548 unsigned long flags; 549 550 /* store the mac for the unicast filter */ 551 spin_lock_irqsave(&priv->lock, flags); 552 ltq_etop_w32(*((u32 *)dev->dev_addr), LTQ_ETOP_MAC_DA0); 553 ltq_etop_w32(*((u16 *)&dev->dev_addr[4]) << 16, 554 LTQ_ETOP_MAC_DA1); 555 spin_unlock_irqrestore(&priv->lock, flags); 556 } 557 return ret; 558 } 559 560 static void 561 ltq_etop_set_multicast_list(struct net_device *dev) 562 { 563 struct ltq_etop_priv *priv = netdev_priv(dev); 564 unsigned long flags; 565 566 /* ensure that the unicast filter is not enabled in promiscious mode */ 567 spin_lock_irqsave(&priv->lock, flags); 568 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) 569 ltq_etop_w32_mask(ETOP_FTCU, 0, LTQ_ETOP_ENETS0); 570 else 571 ltq_etop_w32_mask(0, ETOP_FTCU, LTQ_ETOP_ENETS0); 572 spin_unlock_irqrestore(&priv->lock, flags); 573 } 574 575 static u16 576 ltq_etop_select_queue(struct net_device *dev, struct sk_buff *skb, 577 void *accel_priv, select_queue_fallback_t fallback) 578 { 579 /* we are currently only using the first queue */ 580 return 0; 581 } 582 583 static int 584 ltq_etop_init(struct net_device *dev) 585 { 586 struct ltq_etop_priv *priv = netdev_priv(dev); 587 struct sockaddr mac; 588 int err; 589 bool random_mac = false; 590 591 dev->watchdog_timeo = 10 * HZ; 592 err = ltq_etop_hw_init(dev); 593 if (err) 594 goto err_hw; 595 ltq_etop_change_mtu(dev, 1500); 596 597 memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr)); 598 if (!is_valid_ether_addr(mac.sa_data)) { 599 pr_warn("etop: invalid MAC, using random\n"); 600 eth_random_addr(mac.sa_data); 601 random_mac = true; 602 } 603 604 err = ltq_etop_set_mac_address(dev, &mac); 605 if (err) 606 goto err_netdev; 607 608 /* Set addr_assign_type here, ltq_etop_set_mac_address would reset it. */ 609 if (random_mac) 610 dev->addr_assign_type = NET_ADDR_RANDOM; 611 612 ltq_etop_set_multicast_list(dev); 613 err = ltq_etop_mdio_init(dev); 614 if (err) 615 goto err_netdev; 616 return 0; 617 618 err_netdev: 619 unregister_netdev(dev); 620 free_netdev(dev); 621 err_hw: 622 ltq_etop_hw_exit(dev); 623 return err; 624 } 625 626 static void 627 ltq_etop_tx_timeout(struct net_device *dev) 628 { 629 int err; 630 631 ltq_etop_hw_exit(dev); 632 err = ltq_etop_hw_init(dev); 633 if (err) 634 goto err_hw; 635 netif_trans_update(dev); 636 netif_wake_queue(dev); 637 return; 638 639 err_hw: 640 ltq_etop_hw_exit(dev); 641 netdev_err(dev, "failed to restart etop after TX timeout\n"); 642 } 643 644 static const struct net_device_ops ltq_eth_netdev_ops = { 645 .ndo_open = ltq_etop_open, 646 .ndo_stop = ltq_etop_stop, 647 .ndo_start_xmit = ltq_etop_tx, 648 .ndo_change_mtu = ltq_etop_change_mtu, 649 .ndo_do_ioctl = ltq_etop_ioctl, 650 .ndo_set_mac_address = ltq_etop_set_mac_address, 651 .ndo_validate_addr = eth_validate_addr, 652 .ndo_set_rx_mode = ltq_etop_set_multicast_list, 653 .ndo_select_queue = ltq_etop_select_queue, 654 .ndo_init = ltq_etop_init, 655 .ndo_tx_timeout = ltq_etop_tx_timeout, 656 }; 657 658 static int __init 659 ltq_etop_probe(struct platform_device *pdev) 660 { 661 struct net_device *dev; 662 struct ltq_etop_priv *priv; 663 struct resource *res; 664 int err; 665 int i; 666 667 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 668 if (!res) { 669 dev_err(&pdev->dev, "failed to get etop resource\n"); 670 err = -ENOENT; 671 goto err_out; 672 } 673 674 res = devm_request_mem_region(&pdev->dev, res->start, 675 resource_size(res), dev_name(&pdev->dev)); 676 if (!res) { 677 dev_err(&pdev->dev, "failed to request etop resource\n"); 678 err = -EBUSY; 679 goto err_out; 680 } 681 682 ltq_etop_membase = devm_ioremap_nocache(&pdev->dev, 683 res->start, resource_size(res)); 684 if (!ltq_etop_membase) { 685 dev_err(&pdev->dev, "failed to remap etop engine %d\n", 686 pdev->id); 687 err = -ENOMEM; 688 goto err_out; 689 } 690 691 dev = alloc_etherdev_mq(sizeof(struct ltq_etop_priv), 4); 692 if (!dev) { 693 err = -ENOMEM; 694 goto err_out; 695 } 696 strcpy(dev->name, "eth%d"); 697 dev->netdev_ops = <q_eth_netdev_ops; 698 dev->ethtool_ops = <q_etop_ethtool_ops; 699 priv = netdev_priv(dev); 700 priv->res = res; 701 priv->pdev = pdev; 702 priv->pldata = dev_get_platdata(&pdev->dev); 703 priv->netdev = dev; 704 spin_lock_init(&priv->lock); 705 706 for (i = 0; i < MAX_DMA_CHAN; i++) { 707 if (IS_TX(i)) 708 netif_napi_add(dev, &priv->ch[i].napi, 709 ltq_etop_poll_tx, 8); 710 else if (IS_RX(i)) 711 netif_napi_add(dev, &priv->ch[i].napi, 712 ltq_etop_poll_rx, 32); 713 priv->ch[i].netdev = dev; 714 } 715 716 err = register_netdev(dev); 717 if (err) 718 goto err_free; 719 720 platform_set_drvdata(pdev, dev); 721 return 0; 722 723 err_free: 724 free_netdev(dev); 725 err_out: 726 return err; 727 } 728 729 static int 730 ltq_etop_remove(struct platform_device *pdev) 731 { 732 struct net_device *dev = platform_get_drvdata(pdev); 733 734 if (dev) { 735 netif_tx_stop_all_queues(dev); 736 ltq_etop_hw_exit(dev); 737 ltq_etop_mdio_cleanup(dev); 738 unregister_netdev(dev); 739 } 740 return 0; 741 } 742 743 static struct platform_driver ltq_mii_driver = { 744 .remove = ltq_etop_remove, 745 .driver = { 746 .name = "ltq_etop", 747 }, 748 }; 749 750 int __init 751 init_ltq_etop(void) 752 { 753 int ret = platform_driver_probe(<q_mii_driver, ltq_etop_probe); 754 755 if (ret) 756 pr_err("ltq_etop: Error registering platform driver!"); 757 return ret; 758 } 759 760 static void __exit 761 exit_ltq_etop(void) 762 { 763 platform_driver_unregister(<q_mii_driver); 764 } 765 766 module_init(init_ltq_etop); 767 module_exit(exit_ltq_etop); 768 769 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); 770 MODULE_DESCRIPTION("Lantiq SoC ETOP"); 771 MODULE_LICENSE("GPL"); 772