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 87static void __iomem *ltq_etop_membase; 88 89struct 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 98struct 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 struct phy_device *phydev; 106 107 struct ltq_etop_chan ch[MAX_DMA_CHAN]; 108 int tx_free[MAX_DMA_CHAN >> 1]; 109 110 spinlock_t lock; 111}; 112 113static int 114ltq_etop_alloc_skb(struct ltq_etop_chan *ch) 115{ 116 ch->skb[ch->dma.desc] = netdev_alloc_skb(ch->netdev, MAX_DMA_DATA_LEN); 117 if (!ch->skb[ch->dma.desc]) 118 return -ENOMEM; 119 ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(NULL, 120 ch->skb[ch->dma.desc]->data, MAX_DMA_DATA_LEN, 121 DMA_FROM_DEVICE); 122 ch->dma.desc_base[ch->dma.desc].addr = 123 CPHYSADDR(ch->skb[ch->dma.desc]->data); 124 ch->dma.desc_base[ch->dma.desc].ctl = 125 LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | 126 MAX_DMA_DATA_LEN; 127 skb_reserve(ch->skb[ch->dma.desc], NET_IP_ALIGN); 128 return 0; 129} 130 131static void 132ltq_etop_hw_receive(struct ltq_etop_chan *ch) 133{ 134 struct ltq_etop_priv *priv = netdev_priv(ch->netdev); 135 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; 136 struct sk_buff *skb = ch->skb[ch->dma.desc]; 137 int len = (desc->ctl & LTQ_DMA_SIZE_MASK) - MAX_DMA_CRC_LEN; 138 unsigned long flags; 139 140 spin_lock_irqsave(&priv->lock, flags); 141 if (ltq_etop_alloc_skb(ch)) { 142 netdev_err(ch->netdev, 143 "failed to allocate new rx buffer, stopping DMA\n"); 144 ltq_dma_close(&ch->dma); 145 } 146 ch->dma.desc++; 147 ch->dma.desc %= LTQ_DESC_NUM; 148 spin_unlock_irqrestore(&priv->lock, flags); 149 150 skb_put(skb, len); 151 skb->protocol = eth_type_trans(skb, ch->netdev); 152 netif_receive_skb(skb); 153} 154 155static int 156ltq_etop_poll_rx(struct napi_struct *napi, int budget) 157{ 158 struct ltq_etop_chan *ch = container_of(napi, 159 struct ltq_etop_chan, napi); 160 int rx = 0; 161 int complete = 0; 162 163 while ((rx < budget) && !complete) { 164 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; 165 166 if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) { 167 ltq_etop_hw_receive(ch); 168 rx++; 169 } else { 170 complete = 1; 171 } 172 } 173 if (complete || !rx) { 174 napi_complete(&ch->napi); 175 ltq_dma_ack_irq(&ch->dma); 176 } 177 return rx; 178} 179 180static int 181ltq_etop_poll_tx(struct napi_struct *napi, int budget) 182{ 183 struct ltq_etop_chan *ch = 184 container_of(napi, struct ltq_etop_chan, napi); 185 struct ltq_etop_priv *priv = netdev_priv(ch->netdev); 186 struct netdev_queue *txq = 187 netdev_get_tx_queue(ch->netdev, ch->idx >> 1); 188 unsigned long flags; 189 190 spin_lock_irqsave(&priv->lock, flags); 191 while ((ch->dma.desc_base[ch->tx_free].ctl & 192 (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) { 193 dev_kfree_skb_any(ch->skb[ch->tx_free]); 194 ch->skb[ch->tx_free] = NULL; 195 memset(&ch->dma.desc_base[ch->tx_free], 0, 196 sizeof(struct ltq_dma_desc)); 197 ch->tx_free++; 198 ch->tx_free %= LTQ_DESC_NUM; 199 } 200 spin_unlock_irqrestore(&priv->lock, flags); 201 202 if (netif_tx_queue_stopped(txq)) 203 netif_tx_start_queue(txq); 204 napi_complete(&ch->napi); 205 ltq_dma_ack_irq(&ch->dma); 206 return 1; 207} 208 209static irqreturn_t 210ltq_etop_dma_irq(int irq, void *_priv) 211{ 212 struct ltq_etop_priv *priv = _priv; 213 int ch = irq - LTQ_DMA_CH0_INT; 214 215 napi_schedule(&priv->ch[ch].napi); 216 return IRQ_HANDLED; 217} 218 219static void 220ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch) 221{ 222 struct ltq_etop_priv *priv = netdev_priv(dev); 223 224 ltq_dma_free(&ch->dma); 225 if (ch->dma.irq) 226 free_irq(ch->dma.irq, priv); 227 if (IS_RX(ch->idx)) { 228 int desc; 229 for (desc = 0; desc < LTQ_DESC_NUM; desc++) 230 dev_kfree_skb_any(ch->skb[ch->dma.desc]); 231 } 232} 233 234static void 235ltq_etop_hw_exit(struct net_device *dev) 236{ 237 struct ltq_etop_priv *priv = netdev_priv(dev); 238 int i; 239 240 ltq_pmu_disable(PMU_PPE); 241 for (i = 0; i < MAX_DMA_CHAN; i++) 242 if (IS_TX(i) || IS_RX(i)) 243 ltq_etop_free_channel(dev, &priv->ch[i]); 244} 245 246static int 247ltq_etop_hw_init(struct net_device *dev) 248{ 249 struct ltq_etop_priv *priv = netdev_priv(dev); 250 int i; 251 252 ltq_pmu_enable(PMU_PPE); 253 254 switch (priv->pldata->mii_mode) { 255 case PHY_INTERFACE_MODE_RMII: 256 ltq_etop_w32_mask(ETOP_MII_MASK, 257 ETOP_MII_REVERSE, LTQ_ETOP_CFG); 258 break; 259 260 case PHY_INTERFACE_MODE_MII: 261 ltq_etop_w32_mask(ETOP_MII_MASK, 262 ETOP_MII_NORMAL, LTQ_ETOP_CFG); 263 break; 264 265 default: 266 netdev_err(dev, "unknown mii mode %d\n", 267 priv->pldata->mii_mode); 268 return -ENOTSUPP; 269 } 270 271 /* enable crc generation */ 272 ltq_etop_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG); 273 274 ltq_dma_init_port(DMA_PORT_ETOP); 275 276 for (i = 0; i < MAX_DMA_CHAN; i++) { 277 int irq = LTQ_DMA_CH0_INT + i; 278 struct ltq_etop_chan *ch = &priv->ch[i]; 279 280 ch->idx = ch->dma.nr = i; 281 282 if (IS_TX(i)) { 283 ltq_dma_alloc_tx(&ch->dma); 284 request_irq(irq, ltq_etop_dma_irq, 0, "etop_tx", priv); 285 } else if (IS_RX(i)) { 286 ltq_dma_alloc_rx(&ch->dma); 287 for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM; 288 ch->dma.desc++) 289 if (ltq_etop_alloc_skb(ch)) 290 return -ENOMEM; 291 ch->dma.desc = 0; 292 request_irq(irq, ltq_etop_dma_irq, 0, "etop_rx", priv); 293 } 294 ch->dma.irq = irq; 295 } 296 return 0; 297} 298 299static void 300ltq_etop_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 301{ 302 strlcpy(info->driver, "Lantiq ETOP", sizeof(info->driver)); 303 strlcpy(info->bus_info, "internal", sizeof(info->bus_info)); 304 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 305} 306 307static int 308ltq_etop_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 309{ 310 struct ltq_etop_priv *priv = netdev_priv(dev); 311 312 return phy_ethtool_gset(priv->phydev, cmd); 313} 314 315static int 316ltq_etop_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 317{ 318 struct ltq_etop_priv *priv = netdev_priv(dev); 319 320 return phy_ethtool_sset(priv->phydev, cmd); 321} 322 323static int 324ltq_etop_nway_reset(struct net_device *dev) 325{ 326 struct ltq_etop_priv *priv = netdev_priv(dev); 327 328 return phy_start_aneg(priv->phydev); 329} 330 331static const struct ethtool_ops ltq_etop_ethtool_ops = { 332 .get_drvinfo = ltq_etop_get_drvinfo, 333 .get_settings = ltq_etop_get_settings, 334 .set_settings = ltq_etop_set_settings, 335 .nway_reset = ltq_etop_nway_reset, 336}; 337 338static int 339ltq_etop_mdio_wr(struct mii_bus *bus, int phy_addr, int phy_reg, u16 phy_data) 340{ 341 u32 val = MDIO_REQUEST | 342 ((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) | 343 ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET) | 344 phy_data; 345 346 while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST) 347 ; 348 ltq_etop_w32(val, LTQ_ETOP_MDIO); 349 return 0; 350} 351 352static int 353ltq_etop_mdio_rd(struct mii_bus *bus, int phy_addr, int phy_reg) 354{ 355 u32 val = MDIO_REQUEST | MDIO_READ | 356 ((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) | 357 ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET); 358 359 while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST) 360 ; 361 ltq_etop_w32(val, LTQ_ETOP_MDIO); 362 while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST) 363 ; 364 val = ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_VAL_MASK; 365 return val; 366} 367 368static void 369ltq_etop_mdio_link(struct net_device *dev) 370{ 371 /* nothing to do */ 372} 373 374static int 375ltq_etop_mdio_probe(struct net_device *dev) 376{ 377 struct ltq_etop_priv *priv = netdev_priv(dev); 378 struct phy_device *phydev = NULL; 379 int phy_addr; 380 381 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { 382 if (priv->mii_bus->phy_map[phy_addr]) { 383 phydev = priv->mii_bus->phy_map[phy_addr]; 384 break; 385 } 386 } 387 388 if (!phydev) { 389 netdev_err(dev, "no PHY found\n"); 390 return -ENODEV; 391 } 392 393 phydev = phy_connect(dev, dev_name(&phydev->dev), 394 <q_etop_mdio_link, priv->pldata->mii_mode); 395 396 if (IS_ERR(phydev)) { 397 netdev_err(dev, "Could not attach to PHY\n"); 398 return PTR_ERR(phydev); 399 } 400 401 phydev->supported &= (SUPPORTED_10baseT_Half 402 | SUPPORTED_10baseT_Full 403 | SUPPORTED_100baseT_Half 404 | SUPPORTED_100baseT_Full 405 | SUPPORTED_Autoneg 406 | SUPPORTED_MII 407 | SUPPORTED_TP); 408 409 phydev->advertising = phydev->supported; 410 priv->phydev = phydev; 411 pr_info("%s: attached PHY [%s] (phy_addr=%s, irq=%d)\n", 412 dev->name, phydev->drv->name, 413 dev_name(&phydev->dev), phydev->irq); 414 415 return 0; 416} 417 418static int 419ltq_etop_mdio_init(struct net_device *dev) 420{ 421 struct ltq_etop_priv *priv = netdev_priv(dev); 422 int i; 423 int err; 424 425 priv->mii_bus = mdiobus_alloc(); 426 if (!priv->mii_bus) { 427 netdev_err(dev, "failed to allocate mii bus\n"); 428 err = -ENOMEM; 429 goto err_out; 430 } 431 432 priv->mii_bus->priv = dev; 433 priv->mii_bus->read = ltq_etop_mdio_rd; 434 priv->mii_bus->write = ltq_etop_mdio_wr; 435 priv->mii_bus->name = "ltq_mii"; 436 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 437 priv->pdev->name, priv->pdev->id); 438 priv->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); 439 if (!priv->mii_bus->irq) { 440 err = -ENOMEM; 441 goto err_out_free_mdiobus; 442 } 443 444 for (i = 0; i < PHY_MAX_ADDR; ++i) 445 priv->mii_bus->irq[i] = PHY_POLL; 446 447 if (mdiobus_register(priv->mii_bus)) { 448 err = -ENXIO; 449 goto err_out_free_mdio_irq; 450 } 451 452 if (ltq_etop_mdio_probe(dev)) { 453 err = -ENXIO; 454 goto err_out_unregister_bus; 455 } 456 return 0; 457 458err_out_unregister_bus: 459 mdiobus_unregister(priv->mii_bus); 460err_out_free_mdio_irq: 461 kfree(priv->mii_bus->irq); 462err_out_free_mdiobus: 463 mdiobus_free(priv->mii_bus); 464err_out: 465 return err; 466} 467 468static void 469ltq_etop_mdio_cleanup(struct net_device *dev) 470{ 471 struct ltq_etop_priv *priv = netdev_priv(dev); 472 473 phy_disconnect(priv->phydev); 474 mdiobus_unregister(priv->mii_bus); 475 kfree(priv->mii_bus->irq); 476 mdiobus_free(priv->mii_bus); 477} 478 479static int 480ltq_etop_open(struct net_device *dev) 481{ 482 struct ltq_etop_priv *priv = netdev_priv(dev); 483 int i; 484 485 for (i = 0; i < MAX_DMA_CHAN; i++) { 486 struct ltq_etop_chan *ch = &priv->ch[i]; 487 488 if (!IS_TX(i) && (!IS_RX(i))) 489 continue; 490 ltq_dma_open(&ch->dma); 491 napi_enable(&ch->napi); 492 } 493 phy_start(priv->phydev); 494 netif_tx_start_all_queues(dev); 495 return 0; 496} 497 498static int 499ltq_etop_stop(struct net_device *dev) 500{ 501 struct ltq_etop_priv *priv = netdev_priv(dev); 502 int i; 503 504 netif_tx_stop_all_queues(dev); 505 phy_stop(priv->phydev); 506 for (i = 0; i < MAX_DMA_CHAN; i++) { 507 struct ltq_etop_chan *ch = &priv->ch[i]; 508 509 if (!IS_RX(i) && !IS_TX(i)) 510 continue; 511 napi_disable(&ch->napi); 512 ltq_dma_close(&ch->dma); 513 } 514 return 0; 515} 516 517static int 518ltq_etop_tx(struct sk_buff *skb, struct net_device *dev) 519{ 520 int queue = skb_get_queue_mapping(skb); 521 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue); 522 struct ltq_etop_priv *priv = netdev_priv(dev); 523 struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1]; 524 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; 525 int len; 526 unsigned long flags; 527 u32 byte_offset; 528 529 len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; 530 531 if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) { 532 dev_kfree_skb_any(skb); 533 netdev_err(dev, "tx ring full\n"); 534 netif_tx_stop_queue(txq); 535 return NETDEV_TX_BUSY; 536 } 537 538 /* dma needs to start on a 16 byte aligned address */ 539 byte_offset = CPHYSADDR(skb->data) % 16; 540 ch->skb[ch->dma.desc] = skb; 541 542 dev->trans_start = jiffies; 543 544 spin_lock_irqsave(&priv->lock, flags); 545 desc->addr = ((unsigned int) dma_map_single(NULL, skb->data, len, 546 DMA_TO_DEVICE)) - byte_offset; 547 wmb(); 548 desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP | 549 LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK); 550 ch->dma.desc++; 551 ch->dma.desc %= LTQ_DESC_NUM; 552 spin_unlock_irqrestore(&priv->lock, flags); 553 554 if (ch->dma.desc_base[ch->dma.desc].ctl & LTQ_DMA_OWN) 555 netif_tx_stop_queue(txq); 556 557 return NETDEV_TX_OK; 558} 559 560static int 561ltq_etop_change_mtu(struct net_device *dev, int new_mtu) 562{ 563 int ret = eth_change_mtu(dev, new_mtu); 564 565 if (!ret) { 566 struct ltq_etop_priv *priv = netdev_priv(dev); 567 unsigned long flags; 568 569 spin_lock_irqsave(&priv->lock, flags); 570 ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu, 571 LTQ_ETOP_IGPLEN); 572 spin_unlock_irqrestore(&priv->lock, flags); 573 } 574 return ret; 575} 576 577static int 578ltq_etop_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 579{ 580 struct ltq_etop_priv *priv = netdev_priv(dev); 581 582 /* TODO: mii-toll reports "No MII transceiver present!." ?!*/ 583 return phy_mii_ioctl(priv->phydev, rq, cmd); 584} 585 586static int 587ltq_etop_set_mac_address(struct net_device *dev, void *p) 588{ 589 int ret = eth_mac_addr(dev, p); 590 591 if (!ret) { 592 struct ltq_etop_priv *priv = netdev_priv(dev); 593 unsigned long flags; 594 595 /* store the mac for the unicast filter */ 596 spin_lock_irqsave(&priv->lock, flags); 597 ltq_etop_w32(*((u32 *)dev->dev_addr), LTQ_ETOP_MAC_DA0); 598 ltq_etop_w32(*((u16 *)&dev->dev_addr[4]) << 16, 599 LTQ_ETOP_MAC_DA1); 600 spin_unlock_irqrestore(&priv->lock, flags); 601 } 602 return ret; 603} 604 605static void 606ltq_etop_set_multicast_list(struct net_device *dev) 607{ 608 struct ltq_etop_priv *priv = netdev_priv(dev); 609 unsigned long flags; 610 611 /* ensure that the unicast filter is not enabled in promiscious mode */ 612 spin_lock_irqsave(&priv->lock, flags); 613 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) 614 ltq_etop_w32_mask(ETOP_FTCU, 0, LTQ_ETOP_ENETS0); 615 else 616 ltq_etop_w32_mask(0, ETOP_FTCU, LTQ_ETOP_ENETS0); 617 spin_unlock_irqrestore(&priv->lock, flags); 618} 619 620static u16 621ltq_etop_select_queue(struct net_device *dev, struct sk_buff *skb, 622 void *accel_priv, select_queue_fallback_t fallback) 623{ 624 /* we are currently only using the first queue */ 625 return 0; 626} 627 628static int 629ltq_etop_init(struct net_device *dev) 630{ 631 struct ltq_etop_priv *priv = netdev_priv(dev); 632 struct sockaddr mac; 633 int err; 634 bool random_mac = false; 635 636 dev->watchdog_timeo = 10 * HZ; 637 err = ltq_etop_hw_init(dev); 638 if (err) 639 goto err_hw; 640 ltq_etop_change_mtu(dev, 1500); 641 642 memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr)); 643 if (!is_valid_ether_addr(mac.sa_data)) { 644 pr_warn("etop: invalid MAC, using random\n"); 645 eth_random_addr(mac.sa_data); 646 random_mac = true; 647 } 648 649 err = ltq_etop_set_mac_address(dev, &mac); 650 if (err) 651 goto err_netdev; 652 653 /* Set addr_assign_type here, ltq_etop_set_mac_address would reset it. */ 654 if (random_mac) 655 dev->addr_assign_type = NET_ADDR_RANDOM; 656 657 ltq_etop_set_multicast_list(dev); 658 err = ltq_etop_mdio_init(dev); 659 if (err) 660 goto err_netdev; 661 return 0; 662 663err_netdev: 664 unregister_netdev(dev); 665 free_netdev(dev); 666err_hw: 667 ltq_etop_hw_exit(dev); 668 return err; 669} 670 671static void 672ltq_etop_tx_timeout(struct net_device *dev) 673{ 674 int err; 675 676 ltq_etop_hw_exit(dev); 677 err = ltq_etop_hw_init(dev); 678 if (err) 679 goto err_hw; 680 dev->trans_start = jiffies; 681 netif_wake_queue(dev); 682 return; 683 684err_hw: 685 ltq_etop_hw_exit(dev); 686 netdev_err(dev, "failed to restart etop after TX timeout\n"); 687} 688 689static const struct net_device_ops ltq_eth_netdev_ops = { 690 .ndo_open = ltq_etop_open, 691 .ndo_stop = ltq_etop_stop, 692 .ndo_start_xmit = ltq_etop_tx, 693 .ndo_change_mtu = ltq_etop_change_mtu, 694 .ndo_do_ioctl = ltq_etop_ioctl, 695 .ndo_set_mac_address = ltq_etop_set_mac_address, 696 .ndo_validate_addr = eth_validate_addr, 697 .ndo_set_rx_mode = ltq_etop_set_multicast_list, 698 .ndo_select_queue = ltq_etop_select_queue, 699 .ndo_init = ltq_etop_init, 700 .ndo_tx_timeout = ltq_etop_tx_timeout, 701}; 702 703static int __init 704ltq_etop_probe(struct platform_device *pdev) 705{ 706 struct net_device *dev; 707 struct ltq_etop_priv *priv; 708 struct resource *res; 709 int err; 710 int i; 711 712 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 713 if (!res) { 714 dev_err(&pdev->dev, "failed to get etop resource\n"); 715 err = -ENOENT; 716 goto err_out; 717 } 718 719 res = devm_request_mem_region(&pdev->dev, res->start, 720 resource_size(res), dev_name(&pdev->dev)); 721 if (!res) { 722 dev_err(&pdev->dev, "failed to request etop resource\n"); 723 err = -EBUSY; 724 goto err_out; 725 } 726 727 ltq_etop_membase = devm_ioremap_nocache(&pdev->dev, 728 res->start, resource_size(res)); 729 if (!ltq_etop_membase) { 730 dev_err(&pdev->dev, "failed to remap etop engine %d\n", 731 pdev->id); 732 err = -ENOMEM; 733 goto err_out; 734 } 735 736 dev = alloc_etherdev_mq(sizeof(struct ltq_etop_priv), 4); 737 if (!dev) { 738 err = -ENOMEM; 739 goto err_out; 740 } 741 strcpy(dev->name, "eth%d"); 742 dev->netdev_ops = <q_eth_netdev_ops; 743 dev->ethtool_ops = <q_etop_ethtool_ops; 744 priv = netdev_priv(dev); 745 priv->res = res; 746 priv->pdev = pdev; 747 priv->pldata = dev_get_platdata(&pdev->dev); 748 priv->netdev = dev; 749 spin_lock_init(&priv->lock); 750 751 for (i = 0; i < MAX_DMA_CHAN; i++) { 752 if (IS_TX(i)) 753 netif_napi_add(dev, &priv->ch[i].napi, 754 ltq_etop_poll_tx, 8); 755 else if (IS_RX(i)) 756 netif_napi_add(dev, &priv->ch[i].napi, 757 ltq_etop_poll_rx, 32); 758 priv->ch[i].netdev = dev; 759 } 760 761 err = register_netdev(dev); 762 if (err) 763 goto err_free; 764 765 platform_set_drvdata(pdev, dev); 766 return 0; 767 768err_free: 769 free_netdev(dev); 770err_out: 771 return err; 772} 773 774static int 775ltq_etop_remove(struct platform_device *pdev) 776{ 777 struct net_device *dev = platform_get_drvdata(pdev); 778 779 if (dev) { 780 netif_tx_stop_all_queues(dev); 781 ltq_etop_hw_exit(dev); 782 ltq_etop_mdio_cleanup(dev); 783 unregister_netdev(dev); 784 } 785 return 0; 786} 787 788static struct platform_driver ltq_mii_driver = { 789 .remove = ltq_etop_remove, 790 .driver = { 791 .name = "ltq_etop", 792 }, 793}; 794 795int __init 796init_ltq_etop(void) 797{ 798 int ret = platform_driver_probe(<q_mii_driver, ltq_etop_probe); 799 800 if (ret) 801 pr_err("ltq_etop: Error registering platform driver!"); 802 return ret; 803} 804 805static void __exit 806exit_ltq_etop(void) 807{ 808 platform_driver_unregister(<q_mii_driver); 809} 810 811module_init(init_ltq_etop); 812module_exit(exit_ltq_etop); 813 814MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); 815MODULE_DESCRIPTION("Lantiq SoC ETOP"); 816MODULE_LICENSE("GPL"); 817