net/dsa/slave.c

   1 /*
   2  * net/dsa/slave.c - Slave device handling
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/list.h>
  12 #include <linux/etherdevice.h>
  13 #include <linux/phy.h>
  14 #include <linux/phy_fixed.h>
  15 #include <linux/of_net.h>
  16 #include <linux/of_mdio.h>
  17 #include "dsa_priv.h"
  18
  19 /* slave mii_bus handling ***************************************************/
  20 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
  21 {
  22         struct dsa_switch *ds = bus->priv;
  23
  24         if (ds->phys_mii_mask & (1 << addr))
  25                 return ds->drv->phy_read(ds, addr, reg);
  26
  27         return 0xffff;
  28 }
  29
  30 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
  31 {
  32         struct dsa_switch *ds = bus->priv;
  33
  34         if (ds->phys_mii_mask & (1 << addr))
  35                 return ds->drv->phy_write(ds, addr, reg, val);
  36
  37         return 0;
  38 }
  39
  40 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
  41 {
  42         ds->slave_mii_bus->priv = (void *)ds;
  43         ds->slave_mii_bus->name = "dsa slave smi";
  44         ds->slave_mii_bus->read = dsa_slave_phy_read;
  45         ds->slave_mii_bus->write = dsa_slave_phy_write;
  46         snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
  47                         ds->index, ds->pd->sw_addr);
  48         ds->slave_mii_bus->parent = ds->master_dev;
  49 }
  50
  51
  52 /* slave device handling ****************************************************/
  53 static int dsa_slave_init(struct net_device *dev)
  54 {
  55         struct dsa_slave_priv *p = netdev_priv(dev);
  56
  57         dev->iflink = p->parent->dst->master_netdev->ifindex;
  58
  59         return 0;
  60 }
  61
  62 static int dsa_slave_open(struct net_device *dev)
  63 {
  64         struct dsa_slave_priv *p = netdev_priv(dev);
  65         struct net_device *master = p->parent->dst->master_netdev;
  66         struct dsa_switch *ds = p->parent;
  67         int err;
  68
  69         if (!(master->flags & IFF_UP))
  70                 return -ENETDOWN;
  71
  72         if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
  73                 err = dev_uc_add(master, dev->dev_addr);
  74                 if (err < 0)
  75                         goto out;
  76         }
  77
  78         if (dev->flags & IFF_ALLMULTI) {
  79                 err = dev_set_allmulti(master, 1);
  80                 if (err < 0)
  81                         goto del_unicast;
  82         }
  83         if (dev->flags & IFF_PROMISC) {
  84                 err = dev_set_promiscuity(master, 1);
  85                 if (err < 0)
  86                         goto clear_allmulti;
  87         }
  88
  89         if (ds->drv->port_enable) {
  90                 err = ds->drv->port_enable(ds, p->port, p->phy);
  91                 if (err)
  92                         goto clear_promisc;
  93         }
  94
  95         if (p->phy)
  96                 phy_start(p->phy);
  97
  98         return 0;
  99
 100 clear_promisc:
 101         if (dev->flags & IFF_PROMISC)
 102                 dev_set_promiscuity(master, 0);
 103 clear_allmulti:
 104         if (dev->flags & IFF_ALLMULTI)
 105                 dev_set_allmulti(master, -1);
 106 del_unicast:
 107         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 108                 dev_uc_del(master, dev->dev_addr);
 109 out:
 110         return err;
 111 }
 112
 113 static int dsa_slave_close(struct net_device *dev)
 114 {
 115         struct dsa_slave_priv *p = netdev_priv(dev);
 116         struct net_device *master = p->parent->dst->master_netdev;
 117         struct dsa_switch *ds = p->parent;
 118
 119         if (p->phy)
 120                 phy_stop(p->phy);
 121
 122         dev_mc_unsync(master, dev);
 123         dev_uc_unsync(master, dev);
 124         if (dev->flags & IFF_ALLMULTI)
 125                 dev_set_allmulti(master, -1);
 126         if (dev->flags & IFF_PROMISC)
 127                 dev_set_promiscuity(master, -1);
 128
 129         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 130                 dev_uc_del(master, dev->dev_addr);
 131
 132         if (ds->drv->port_disable)
 133                 ds->drv->port_disable(ds, p->port, p->phy);
 134
 135         return 0;
 136 }
 137
 138 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
 139 {
 140         struct dsa_slave_priv *p = netdev_priv(dev);
 141         struct net_device *master = p->parent->dst->master_netdev;
 142
 143         if (change & IFF_ALLMULTI)
 144                 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
 145         if (change & IFF_PROMISC)
 146                 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
 147 }
 148
 149 static void dsa_slave_set_rx_mode(struct net_device *dev)
 150 {
 151         struct dsa_slave_priv *p = netdev_priv(dev);
 152         struct net_device *master = p->parent->dst->master_netdev;
 153
 154         dev_mc_sync(master, dev);
 155         dev_uc_sync(master, dev);
 156 }
 157
 158 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
 159 {
 160         struct dsa_slave_priv *p = netdev_priv(dev);
 161         struct net_device *master = p->parent->dst->master_netdev;
 162         struct sockaddr *addr = a;
 163         int err;
 164
 165         if (!is_valid_ether_addr(addr->sa_data))
 166                 return -EADDRNOTAVAIL;
 167
 168         if (!(dev->flags & IFF_UP))
 169                 goto out;
 170
 171         if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
 172                 err = dev_uc_add(master, addr->sa_data);
 173                 if (err < 0)
 174                         return err;
 175         }
 176
 177         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 178                 dev_uc_del(master, dev->dev_addr);
 179
 180 out:
 181         ether_addr_copy(dev->dev_addr, addr->sa_data);
 182
 183         return 0;
 184 }
 185
 186 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 187 {
 188         struct dsa_slave_priv *p = netdev_priv(dev);
 189
 190         if (p->phy != NULL)
 191                 return phy_mii_ioctl(p->phy, ifr, cmd);
 192
 193         return -EOPNOTSUPP;
 194 }
 195
 196 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 197 {
 198         struct dsa_slave_priv *p = netdev_priv(dev);
 199
 200         return p->xmit(skb, dev);
 201 }
 202
 203 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
 204                                         struct net_device *dev)
 205 {
 206         struct dsa_slave_priv *p = netdev_priv(dev);
 207
 208         skb->dev = p->parent->dst->master_netdev;
 209         dev_queue_xmit(skb);
 210
 211         return NETDEV_TX_OK;
 212 }
 213
 214
 215 /* ethtool operations *******************************************************/
 216 static int
 217 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 218 {
 219         struct dsa_slave_priv *p = netdev_priv(dev);
 220         int err;
 221
 222         err = -EOPNOTSUPP;
 223         if (p->phy != NULL) {
 224                 err = phy_read_status(p->phy);
 225                 if (err == 0)
 226                         err = phy_ethtool_gset(p->phy, cmd);
 227         }
 228
 229         return err;
 230 }
 231
 232 static int
 233 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 234 {
 235         struct dsa_slave_priv *p = netdev_priv(dev);
 236
 237         if (p->phy != NULL)
 238                 return phy_ethtool_sset(p->phy, cmd);
 239
 240         return -EOPNOTSUPP;
 241 }
 242
 243 static void dsa_slave_get_drvinfo(struct net_device *dev,
 244                                   struct ethtool_drvinfo *drvinfo)
 245 {
 246         strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
 247         strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
 248         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
 249         strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 250 }
 251
 252 static int dsa_slave_get_regs_len(struct net_device *dev)
 253 {
 254         struct dsa_slave_priv *p = netdev_priv(dev);
 255         struct dsa_switch *ds = p->parent;
 256
 257         if (ds->drv->get_regs_len)
 258                 return ds->drv->get_regs_len(ds, p->port);
 259
 260         return -EOPNOTSUPP;
 261 }
 262
 263 static void
 264 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 265 {
 266         struct dsa_slave_priv *p = netdev_priv(dev);
 267         struct dsa_switch *ds = p->parent;
 268
 269         if (ds->drv->get_regs)
 270                 ds->drv->get_regs(ds, p->port, regs, _p);
 271 }
 272
 273 static int dsa_slave_nway_reset(struct net_device *dev)
 274 {
 275         struct dsa_slave_priv *p = netdev_priv(dev);
 276
 277         if (p->phy != NULL)
 278                 return genphy_restart_aneg(p->phy);
 279
 280         return -EOPNOTSUPP;
 281 }
 282
 283 static u32 dsa_slave_get_link(struct net_device *dev)
 284 {
 285         struct dsa_slave_priv *p = netdev_priv(dev);
 286
 287         if (p->phy != NULL) {
 288                 genphy_update_link(p->phy);
 289                 return p->phy->link;
 290         }
 291
 292         return -EOPNOTSUPP;
 293 }
 294
 295 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 296 {
 297         struct dsa_slave_priv *p = netdev_priv(dev);
 298         struct dsa_switch *ds = p->parent;
 299
 300         if (ds->pd->eeprom_len)
 301                 return ds->pd->eeprom_len;
 302
 303         if (ds->drv->get_eeprom_len)
 304                 return ds->drv->get_eeprom_len(ds);
 305
 306         return 0;
 307 }
 308
 309 static int dsa_slave_get_eeprom(struct net_device *dev,
 310                                 struct ethtool_eeprom *eeprom, u8 *data)
 311 {
 312         struct dsa_slave_priv *p = netdev_priv(dev);
 313         struct dsa_switch *ds = p->parent;
 314
 315         if (ds->drv->get_eeprom)
 316                 return ds->drv->get_eeprom(ds, eeprom, data);
 317
 318         return -EOPNOTSUPP;
 319 }
 320
 321 static int dsa_slave_set_eeprom(struct net_device *dev,
 322                                 struct ethtool_eeprom *eeprom, u8 *data)
 323 {
 324         struct dsa_slave_priv *p = netdev_priv(dev);
 325         struct dsa_switch *ds = p->parent;
 326
 327         if (ds->drv->set_eeprom)
 328                 return ds->drv->set_eeprom(ds, eeprom, data);
 329
 330         return -EOPNOTSUPP;
 331 }
 332
 333 static void dsa_slave_get_strings(struct net_device *dev,
 334                                   uint32_t stringset, uint8_t *data)
 335 {
 336         struct dsa_slave_priv *p = netdev_priv(dev);
 337         struct dsa_switch *ds = p->parent;
 338
 339         if (stringset == ETH_SS_STATS) {
 340                 int len = ETH_GSTRING_LEN;
 341
 342                 strncpy(data, "tx_packets", len);
 343                 strncpy(data + len, "tx_bytes", len);
 344                 strncpy(data + 2 * len, "rx_packets", len);
 345                 strncpy(data + 3 * len, "rx_bytes", len);
 346                 if (ds->drv->get_strings != NULL)
 347                         ds->drv->get_strings(ds, p->port, data + 4 * len);
 348         }
 349 }
 350
 351 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 352                                         struct ethtool_stats *stats,
 353                                         uint64_t *data)
 354 {
 355         struct dsa_slave_priv *p = netdev_priv(dev);
 356         struct dsa_switch *ds = p->parent;
 357
 358         data[0] = p->dev->stats.tx_packets;
 359         data[1] = p->dev->stats.tx_bytes;
 360         data[2] = p->dev->stats.rx_packets;
 361         data[3] = p->dev->stats.rx_bytes;
 362         if (ds->drv->get_ethtool_stats != NULL)
 363                 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
 364 }
 365
 366 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 367 {
 368         struct dsa_slave_priv *p = netdev_priv(dev);
 369         struct dsa_switch *ds = p->parent;
 370
 371         if (sset == ETH_SS_STATS) {
 372                 int count;
 373
 374                 count = 4;
 375                 if (ds->drv->get_sset_count != NULL)
 376                         count += ds->drv->get_sset_count(ds);
 377
 378                 return count;
 379         }
 380
 381         return -EOPNOTSUPP;
 382 }
 383
 384 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 385 {
 386         struct dsa_slave_priv *p = netdev_priv(dev);
 387         struct dsa_switch *ds = p->parent;
 388
 389         if (ds->drv->get_wol)
 390                 ds->drv->get_wol(ds, p->port, w);
 391 }
 392
 393 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 394 {
 395         struct dsa_slave_priv *p = netdev_priv(dev);
 396         struct dsa_switch *ds = p->parent;
 397         int ret = -EOPNOTSUPP;
 398
 399         if (ds->drv->set_wol)
 400                 ret = ds->drv->set_wol(ds, p->port, w);
 401
 402         return ret;
 403 }
 404
 405 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 406 {
 407         struct dsa_slave_priv *p = netdev_priv(dev);
 408         struct dsa_switch *ds = p->parent;
 409         int ret;
 410
 411         if (!ds->drv->set_eee)
 412                 return -EOPNOTSUPP;
 413
 414         ret = ds->drv->set_eee(ds, p->port, p->phy, e);
 415         if (ret)
 416                 return ret;
 417
 418         if (p->phy)
 419                 ret = phy_ethtool_set_eee(p->phy, e);
 420
 421         return ret;
 422 }
 423
 424 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 425 {
 426         struct dsa_slave_priv *p = netdev_priv(dev);
 427         struct dsa_switch *ds = p->parent;
 428         int ret;
 429
 430         if (!ds->drv->get_eee)
 431                 return -EOPNOTSUPP;
 432
 433         ret = ds->drv->get_eee(ds, p->port, e);
 434         if (ret)
 435                 return ret;
 436
 437         if (p->phy)
 438                 ret = phy_ethtool_get_eee(p->phy, e);
 439
 440         return ret;
 441 }
 442
 443 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 444         .get_settings           = dsa_slave_get_settings,
 445         .set_settings           = dsa_slave_set_settings,
 446         .get_drvinfo            = dsa_slave_get_drvinfo,
 447         .get_regs_len           = dsa_slave_get_regs_len,
 448         .get_regs               = dsa_slave_get_regs,
 449         .nway_reset             = dsa_slave_nway_reset,
 450         .get_link               = dsa_slave_get_link,
 451         .get_eeprom_len         = dsa_slave_get_eeprom_len,
 452         .get_eeprom             = dsa_slave_get_eeprom,
 453         .set_eeprom             = dsa_slave_set_eeprom,
 454         .get_strings            = dsa_slave_get_strings,
 455         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
 456         .get_sset_count         = dsa_slave_get_sset_count,
 457         .set_wol                = dsa_slave_set_wol,
 458         .get_wol                = dsa_slave_get_wol,
 459         .set_eee                = dsa_slave_set_eee,
 460         .get_eee                = dsa_slave_get_eee,
 461 };
 462
 463 static const struct net_device_ops dsa_slave_netdev_ops = {
 464         .ndo_init               = dsa_slave_init,
 465         .ndo_open               = dsa_slave_open,
 466         .ndo_stop               = dsa_slave_close,
 467         .ndo_start_xmit         = dsa_slave_xmit,
 468         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 469         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 470         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 471         .ndo_do_ioctl           = dsa_slave_ioctl,
 472 };
 473
 474 static void dsa_slave_adjust_link(struct net_device *dev)
 475 {
 476         struct dsa_slave_priv *p = netdev_priv(dev);
 477         struct dsa_switch *ds = p->parent;
 478         unsigned int status_changed = 0;
 479
 480         if (p->old_link != p->phy->link) {
 481                 status_changed = 1;
 482                 p->old_link = p->phy->link;
 483         }
 484
 485         if (p->old_duplex != p->phy->duplex) {
 486                 status_changed = 1;
 487                 p->old_duplex = p->phy->duplex;
 488         }
 489
 490         if (p->old_pause != p->phy->pause) {
 491                 status_changed = 1;
 492                 p->old_pause = p->phy->pause;
 493         }
 494
 495         if (ds->drv->adjust_link && status_changed)
 496                 ds->drv->adjust_link(ds, p->port, p->phy);
 497
 498         if (status_changed)
 499                 phy_print_status(p->phy);
 500 }
 501
 502 static int dsa_slave_fixed_link_update(struct net_device *dev,
 503                                        struct fixed_phy_status *status)
 504 {
 505         struct dsa_slave_priv *p = netdev_priv(dev);
 506         struct dsa_switch *ds = p->parent;
 507
 508         if (ds->drv->fixed_link_update)
 509                 ds->drv->fixed_link_update(ds, p->port, status);
 510
 511         return 0;
 512 }
 513
 514 /* slave device setup *******************************************************/
 515 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 516                                 struct net_device *slave_dev)
 517 {
 518         struct dsa_switch *ds = p->parent;
 519         struct dsa_chip_data *cd = ds->pd;
 520         struct device_node *phy_dn, *port_dn;
 521         bool phy_is_fixed = false;
 522         u32 phy_flags = 0;
 523         int ret;
 524
 525         port_dn = cd->port_dn[p->port];
 526         p->phy_interface = of_get_phy_mode(port_dn);
 527
 528         phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
 529         if (of_phy_is_fixed_link(port_dn)) {
 530                 /* In the case of a fixed PHY, the DT node associated
 531                  * to the fixed PHY is the Port DT node
 532                  */
 533                 ret = of_phy_register_fixed_link(port_dn);
 534                 if (ret) {
 535                         netdev_err(slave_dev, "failed to register fixed PHY\n");
 536                         return ret;
 537                 }
 538                 phy_is_fixed = true;
 539                 phy_dn = port_dn;
 540         }
 541
 542         if (ds->drv->get_phy_flags)
 543                 phy_flags = ds->drv->get_phy_flags(ds, p->port);
 544
 545         if (phy_dn)
 546                 p->phy = of_phy_connect(slave_dev, phy_dn,
 547                                         dsa_slave_adjust_link, phy_flags,
 548                                         p->phy_interface);
 549
 550         if (p->phy && phy_is_fixed)
 551                 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
 552
 553         /* We could not connect to a designated PHY, so use the switch internal
 554          * MDIO bus instead
 555          */
 556         if (!p->phy) {
 557                 p->phy = ds->slave_mii_bus->phy_map[p->port];
 558                 if (!p->phy)
 559                         return -ENODEV;
 560
 561                 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
 562                                    p->phy_interface);
 563         } else {
 564                 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
 565                             p->phy->addr, p->phy->drv->name);
 566         }
 567
 568         return 0;
 569 }
 570
 571 int dsa_slave_suspend(struct net_device *slave_dev)
 572 {
 573         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 574
 575         netif_device_detach(slave_dev);
 576
 577         if (p->phy) {
 578                 phy_stop(p->phy);
 579                 p->old_pause = -1;
 580                 p->old_link = -1;
 581                 p->old_duplex = -1;
 582                 phy_suspend(p->phy);
 583         }
 584
 585         return 0;
 586 }
 587
 588 int dsa_slave_resume(struct net_device *slave_dev)
 589 {
 590         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 591
 592         netif_device_attach(slave_dev);
 593
 594         if (p->phy) {
 595                 phy_resume(p->phy);
 596                 phy_start(p->phy);
 597         }
 598
 599         return 0;
 600 }
 601
 602 struct net_device *
 603 dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 604                  int port, char *name)
 605 {
 606         struct net_device *master = ds->dst->master_netdev;
 607         struct net_device *slave_dev;
 608         struct dsa_slave_priv *p;
 609         int ret;
 610
 611         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
 612                                  NET_NAME_UNKNOWN, ether_setup);
 613         if (slave_dev == NULL)
 614                 return slave_dev;
 615
 616         slave_dev->features = master->vlan_features;
 617         slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
 618         eth_hw_addr_inherit(slave_dev, master);
 619         slave_dev->tx_queue_len = 0;
 620         slave_dev->netdev_ops = &dsa_slave_netdev_ops;
 621
 622         SET_NETDEV_DEV(slave_dev, parent);
 623         slave_dev->dev.of_node = ds->pd->port_dn[port];
 624         slave_dev->vlan_features = master->vlan_features;
 625
 626         p = netdev_priv(slave_dev);
 627         p->dev = slave_dev;
 628         p->parent = ds;
 629         p->port = port;
 630
 631         switch (ds->dst->tag_protocol) {
 632 #ifdef CONFIG_NET_DSA_TAG_DSA
 633         case DSA_TAG_PROTO_DSA:
 634                 p->xmit = dsa_netdev_ops.xmit;
 635                 break;
 636 #endif
 637 #ifdef CONFIG_NET_DSA_TAG_EDSA
 638         case DSA_TAG_PROTO_EDSA:
 639                 p->xmit = edsa_netdev_ops.xmit;
 640                 break;
 641 #endif
 642 #ifdef CONFIG_NET_DSA_TAG_TRAILER
 643         case DSA_TAG_PROTO_TRAILER:
 644                 p->xmit = trailer_netdev_ops.xmit;
 645                 break;
 646 #endif
 647 #ifdef CONFIG_NET_DSA_TAG_BRCM
 648         case DSA_TAG_PROTO_BRCM:
 649                 p->xmit = brcm_netdev_ops.xmit;
 650                 break;
 651 #endif
 652         default:
 653                 p->xmit = dsa_slave_notag_xmit;
 654                 break;
 655         }
 656
 657         p->old_pause = -1;
 658         p->old_link = -1;
 659         p->old_duplex = -1;
 660
 661         ret = dsa_slave_phy_setup(p, slave_dev);
 662         if (ret) {
 663                 free_netdev(slave_dev);
 664                 return NULL;
 665         }
 666
 667         ret = register_netdev(slave_dev);
 668         if (ret) {
 669                 netdev_err(master, "error %d registering interface %s\n",
 670                            ret, slave_dev->name);
 671                 phy_disconnect(p->phy);
 672                 free_netdev(slave_dev);
 673                 return NULL;
 674         }
 675
 676         netif_carrier_off(slave_dev);
 677
 678         if (p->phy != NULL) {
 679                 if (ds->drv->get_phy_flags)
 680                         p->phy->dev_flags |= ds->drv->get_phy_flags(ds, port);
 681
 682                 phy_attach(slave_dev, dev_name(&p->phy->dev),
 683                            PHY_INTERFACE_MODE_GMII);
 684
 685                 p->phy->autoneg = AUTONEG_ENABLE;
 686                 p->phy->speed = 0;
 687                 p->phy->duplex = 0;
 688                 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;
 689         }
 690
 691         return slave_dev;
 692 }