target/linux/generic/files/drivers/net/phy/ar8216.c

   1 /*
   2  * ar8216.c: AR8216 switch driver
   3  *
   4  * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
   5  * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/if.h>
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/list.h>
  22 #include <linux/if_ether.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/netlink.h>
  26 #include <linux/bitops.h>
  27 #include <net/genetlink.h>
  28 #include <linux/switch.h>
  29 #include <linux/delay.h>
  30 #include <linux/phy.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/lockdep.h>
  34 #include <linux/ar8216_platform.h>
  35 #include <linux/workqueue.h>
  36 #include <linux/version.h>
  37
  38 #include "ar8216.h"
  39
  40 extern const struct ar8xxx_chip ar8327_chip;
  41 extern const struct ar8xxx_chip ar8337_chip;
  42
  43 #define AR8XXX_MIB_WORK_DELAY   2000 /* msecs */
  44
  45 #define MIB_DESC(_s , _o, _n)   \
  46         {                       \
  47                 .size = (_s),   \
  48                 .offset = (_o), \
  49                 .name = (_n),   \
  50         }
  51
  52 static const struct ar8xxx_mib_desc ar8216_mibs[] = {
  53         MIB_DESC(1, AR8216_STATS_RXBROAD, "RxBroad"),
  54         MIB_DESC(1, AR8216_STATS_RXPAUSE, "RxPause"),
  55         MIB_DESC(1, AR8216_STATS_RXMULTI, "RxMulti"),
  56         MIB_DESC(1, AR8216_STATS_RXFCSERR, "RxFcsErr"),
  57         MIB_DESC(1, AR8216_STATS_RXALIGNERR, "RxAlignErr"),
  58         MIB_DESC(1, AR8216_STATS_RXRUNT, "RxRunt"),
  59         MIB_DESC(1, AR8216_STATS_RXFRAGMENT, "RxFragment"),
  60         MIB_DESC(1, AR8216_STATS_RX64BYTE, "Rx64Byte"),
  61         MIB_DESC(1, AR8216_STATS_RX128BYTE, "Rx128Byte"),
  62         MIB_DESC(1, AR8216_STATS_RX256BYTE, "Rx256Byte"),
  63         MIB_DESC(1, AR8216_STATS_RX512BYTE, "Rx512Byte"),
  64         MIB_DESC(1, AR8216_STATS_RX1024BYTE, "Rx1024Byte"),
  65         MIB_DESC(1, AR8216_STATS_RXMAXBYTE, "RxMaxByte"),
  66         MIB_DESC(1, AR8216_STATS_RXTOOLONG, "RxTooLong"),
  67         MIB_DESC(2, AR8216_STATS_RXGOODBYTE, "RxGoodByte"),
  68         MIB_DESC(2, AR8216_STATS_RXBADBYTE, "RxBadByte"),
  69         MIB_DESC(1, AR8216_STATS_RXOVERFLOW, "RxOverFlow"),
  70         MIB_DESC(1, AR8216_STATS_FILTERED, "Filtered"),
  71         MIB_DESC(1, AR8216_STATS_TXBROAD, "TxBroad"),
  72         MIB_DESC(1, AR8216_STATS_TXPAUSE, "TxPause"),
  73         MIB_DESC(1, AR8216_STATS_TXMULTI, "TxMulti"),
  74         MIB_DESC(1, AR8216_STATS_TXUNDERRUN, "TxUnderRun"),
  75         MIB_DESC(1, AR8216_STATS_TX64BYTE, "Tx64Byte"),
  76         MIB_DESC(1, AR8216_STATS_TX128BYTE, "Tx128Byte"),
  77         MIB_DESC(1, AR8216_STATS_TX256BYTE, "Tx256Byte"),
  78         MIB_DESC(1, AR8216_STATS_TX512BYTE, "Tx512Byte"),
  79         MIB_DESC(1, AR8216_STATS_TX1024BYTE, "Tx1024Byte"),
  80         MIB_DESC(1, AR8216_STATS_TXMAXBYTE, "TxMaxByte"),
  81         MIB_DESC(1, AR8216_STATS_TXOVERSIZE, "TxOverSize"),
  82         MIB_DESC(2, AR8216_STATS_TXBYTE, "TxByte"),
  83         MIB_DESC(1, AR8216_STATS_TXCOLLISION, "TxCollision"),
  84         MIB_DESC(1, AR8216_STATS_TXABORTCOL, "TxAbortCol"),
  85         MIB_DESC(1, AR8216_STATS_TXMULTICOL, "TxMultiCol"),
  86         MIB_DESC(1, AR8216_STATS_TXSINGLECOL, "TxSingleCol"),
  87         MIB_DESC(1, AR8216_STATS_TXEXCDEFER, "TxExcDefer"),
  88         MIB_DESC(1, AR8216_STATS_TXDEFER, "TxDefer"),
  89         MIB_DESC(1, AR8216_STATS_TXLATECOL, "TxLateCol"),
  90 };
  91
  92 const struct ar8xxx_mib_desc ar8236_mibs[39] = {
  93         MIB_DESC(1, AR8236_STATS_RXBROAD, "RxBroad"),
  94         MIB_DESC(1, AR8236_STATS_RXPAUSE, "RxPause"),
  95         MIB_DESC(1, AR8236_STATS_RXMULTI, "RxMulti"),
  96         MIB_DESC(1, AR8236_STATS_RXFCSERR, "RxFcsErr"),
  97         MIB_DESC(1, AR8236_STATS_RXALIGNERR, "RxAlignErr"),
  98         MIB_DESC(1, AR8236_STATS_RXRUNT, "RxRunt"),
  99         MIB_DESC(1, AR8236_STATS_RXFRAGMENT, "RxFragment"),
 100         MIB_DESC(1, AR8236_STATS_RX64BYTE, "Rx64Byte"),
 101         MIB_DESC(1, AR8236_STATS_RX128BYTE, "Rx128Byte"),
 102         MIB_DESC(1, AR8236_STATS_RX256BYTE, "Rx256Byte"),
 103         MIB_DESC(1, AR8236_STATS_RX512BYTE, "Rx512Byte"),
 104         MIB_DESC(1, AR8236_STATS_RX1024BYTE, "Rx1024Byte"),
 105         MIB_DESC(1, AR8236_STATS_RX1518BYTE, "Rx1518Byte"),
 106         MIB_DESC(1, AR8236_STATS_RXMAXBYTE, "RxMaxByte"),
 107         MIB_DESC(1, AR8236_STATS_RXTOOLONG, "RxTooLong"),
 108         MIB_DESC(2, AR8236_STATS_RXGOODBYTE, "RxGoodByte"),
 109         MIB_DESC(2, AR8236_STATS_RXBADBYTE, "RxBadByte"),
 110         MIB_DESC(1, AR8236_STATS_RXOVERFLOW, "RxOverFlow"),
 111         MIB_DESC(1, AR8236_STATS_FILTERED, "Filtered"),
 112         MIB_DESC(1, AR8236_STATS_TXBROAD, "TxBroad"),
 113         MIB_DESC(1, AR8236_STATS_TXPAUSE, "TxPause"),
 114         MIB_DESC(1, AR8236_STATS_TXMULTI, "TxMulti"),
 115         MIB_DESC(1, AR8236_STATS_TXUNDERRUN, "TxUnderRun"),
 116         MIB_DESC(1, AR8236_STATS_TX64BYTE, "Tx64Byte"),
 117         MIB_DESC(1, AR8236_STATS_TX128BYTE, "Tx128Byte"),
 118         MIB_DESC(1, AR8236_STATS_TX256BYTE, "Tx256Byte"),
 119         MIB_DESC(1, AR8236_STATS_TX512BYTE, "Tx512Byte"),
 120         MIB_DESC(1, AR8236_STATS_TX1024BYTE, "Tx1024Byte"),
 121         MIB_DESC(1, AR8236_STATS_TX1518BYTE, "Tx1518Byte"),
 122         MIB_DESC(1, AR8236_STATS_TXMAXBYTE, "TxMaxByte"),
 123         MIB_DESC(1, AR8236_STATS_TXOVERSIZE, "TxOverSize"),
 124         MIB_DESC(2, AR8236_STATS_TXBYTE, "TxByte"),
 125         MIB_DESC(1, AR8236_STATS_TXCOLLISION, "TxCollision"),
 126         MIB_DESC(1, AR8236_STATS_TXABORTCOL, "TxAbortCol"),
 127         MIB_DESC(1, AR8236_STATS_TXMULTICOL, "TxMultiCol"),
 128         MIB_DESC(1, AR8236_STATS_TXSINGLECOL, "TxSingleCol"),
 129         MIB_DESC(1, AR8236_STATS_TXEXCDEFER, "TxExcDefer"),
 130         MIB_DESC(1, AR8236_STATS_TXDEFER, "TxDefer"),
 131         MIB_DESC(1, AR8236_STATS_TXLATECOL, "TxLateCol"),
 132 };
 133
 134 static DEFINE_MUTEX(ar8xxx_dev_list_lock);
 135 static LIST_HEAD(ar8xxx_dev_list);
 136
 137 static inline void
 138 split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
 139 {
 140         regaddr >>= 1;
 141         *r1 = regaddr & 0x1e;
 142
 143         regaddr >>= 5;
 144         *r2 = regaddr & 0x7;
 145
 146         regaddr >>= 3;
 147         *page = regaddr & 0x1ff;
 148 }
 149
 150 /* inspired by phy_poll_reset in drivers/net/phy/phy_device.c */
 151 static int
 152 ar8xxx_phy_poll_reset(struct mii_bus *bus)
 153 {
 154         unsigned int sleep_msecs = 20;
 155         int ret, elapsed, i;
 156
 157         for (elapsed = sleep_msecs; elapsed <= 600;
 158              elapsed += sleep_msecs) {
 159                 msleep(sleep_msecs);
 160                 for (i = 0; i < AR8XXX_NUM_PHYS; i++) {
 161                         ret = mdiobus_read(bus, i, MII_BMCR);
 162                         if (ret < 0)
 163                                 return ret;
 164                         if (ret & BMCR_RESET)
 165                                 break;
 166                         if (i == AR8XXX_NUM_PHYS - 1) {
 167                                 usleep_range(1000, 2000);
 168                                 return 0;
 169                         }
 170                 }
 171         }
 172         return -ETIMEDOUT;
 173 }
 174
 175 static int
 176 ar8xxx_phy_check_aneg(struct phy_device *phydev)
 177 {
 178         int ret;
 179
 180         if (phydev->autoneg != AUTONEG_ENABLE)
 181                 return 0;
 182         /*
 183          * BMCR_ANENABLE might have been cleared
 184          * by phy_init_hw in certain kernel versions
 185          * therefore check for it
 186          */
 187         ret = phy_read(phydev, MII_BMCR);
 188         if (ret < 0)
 189                 return ret;
 190         if (ret & BMCR_ANENABLE)
 191                 return 0;
 192
 193         dev_info(&phydev->dev, "ANEG disabled, re-enabling ...\n");
 194         ret |= BMCR_ANENABLE | BMCR_ANRESTART;
 195         return phy_write(phydev, MII_BMCR, ret);
 196 }
 197
 198 void
 199 ar8xxx_phy_init(struct ar8xxx_priv *priv)
 200 {
 201         int i;
 202         struct mii_bus *bus;
 203
 204         bus = priv->mii_bus;
 205         for (i = 0; i < AR8XXX_NUM_PHYS; i++) {
 206                 if (priv->chip->phy_fixup)
 207                         priv->chip->phy_fixup(priv, i);
 208
 209                 /* initialize the port itself */
 210                 mdiobus_write(bus, i, MII_ADVERTISE,
 211                         ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
 212                 if (ar8xxx_has_gige(priv))
 213                         mdiobus_write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
 214                 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
 215         }
 216
 217         ar8xxx_phy_poll_reset(bus);
 218 }
 219
 220 static u32
 221 mii_read32(struct ar8xxx_priv *priv, int phy_id, int regnum)
 222 {
 223         struct mii_bus *bus = priv->mii_bus;
 224         u16 lo, hi;
 225
 226         lo = bus->read(bus, phy_id, regnum);
 227         hi = bus->read(bus, phy_id, regnum + 1);
 228
 229         return (hi << 16) | lo;
 230 }
 231
 232 static void
 233 mii_write32(struct ar8xxx_priv *priv, int phy_id, int regnum, u32 val)
 234 {
 235         struct mii_bus *bus = priv->mii_bus;
 236         u16 lo, hi;
 237
 238         lo = val & 0xffff;
 239         hi = (u16) (val >> 16);
 240
 241         if (priv->chip->mii_lo_first)
 242         {
 243                 bus->write(bus, phy_id, regnum, lo);
 244                 bus->write(bus, phy_id, regnum + 1, hi);
 245         } else {
 246                 bus->write(bus, phy_id, regnum + 1, hi);
 247                 bus->write(bus, phy_id, regnum, lo);
 248         }
 249 }
 250
 251 u32
 252 ar8xxx_read(struct ar8xxx_priv *priv, int reg)
 253 {
 254         struct mii_bus *bus = priv->mii_bus;
 255         u16 r1, r2, page;
 256         u32 val;
 257
 258         split_addr((u32) reg, &r1, &r2, &page);
 259
 260         mutex_lock(&bus->mdio_lock);
 261
 262         bus->write(bus, 0x18, 0, page);
 263         usleep_range(1000, 2000); /* wait for the page switch to propagate */
 264         val = mii_read32(priv, 0x10 | r2, r1);
 265
 266         mutex_unlock(&bus->mdio_lock);
 267
 268         return val;
 269 }
 270
 271 void
 272 ar8xxx_write(struct ar8xxx_priv *priv, int reg, u32 val)
 273 {
 274         struct mii_bus *bus = priv->mii_bus;
 275         u16 r1, r2, page;
 276
 277         split_addr((u32) reg, &r1, &r2, &page);
 278
 279         mutex_lock(&bus->mdio_lock);
 280
 281         bus->write(bus, 0x18, 0, page);
 282         usleep_range(1000, 2000); /* wait for the page switch to propagate */
 283         mii_write32(priv, 0x10 | r2, r1, val);
 284
 285         mutex_unlock(&bus->mdio_lock);
 286 }
 287
 288 u32
 289 ar8xxx_rmw(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
 290 {
 291         struct mii_bus *bus = priv->mii_bus;
 292         u16 r1, r2, page;
 293         u32 ret;
 294
 295         split_addr((u32) reg, &r1, &r2, &page);
 296
 297         mutex_lock(&bus->mdio_lock);
 298
 299         bus->write(bus, 0x18, 0, page);
 300         usleep_range(1000, 2000); /* wait for the page switch to propagate */
 301
 302         ret = mii_read32(priv, 0x10 | r2, r1);
 303         ret &= ~mask;
 304         ret |= val;
 305         mii_write32(priv, 0x10 | r2, r1, ret);
 306
 307         mutex_unlock(&bus->mdio_lock);
 308
 309         return ret;
 310 }
 311
 312 void
 313 ar8xxx_phy_dbg_write(struct ar8xxx_priv *priv, int phy_addr,
 314                      u16 dbg_addr, u16 dbg_data)
 315 {
 316         struct mii_bus *bus = priv->mii_bus;
 317
 318         mutex_lock(&bus->mdio_lock);
 319         bus->write(bus, phy_addr, MII_ATH_DBG_ADDR, dbg_addr);
 320         bus->write(bus, phy_addr, MII_ATH_DBG_DATA, dbg_data);
 321         mutex_unlock(&bus->mdio_lock);
 322 }
 323
 324 void
 325 ar8xxx_phy_mmd_write(struct ar8xxx_priv *priv, int phy_addr, u16 addr, u16 data)
 326 {
 327         struct mii_bus *bus = priv->mii_bus;
 328
 329         mutex_lock(&bus->mdio_lock);
 330         bus->write(bus, phy_addr, MII_ATH_MMD_ADDR, addr);
 331         bus->write(bus, phy_addr, MII_ATH_MMD_DATA, data);
 332         mutex_unlock(&bus->mdio_lock);
 333 }
 334
 335 static int
 336 ar8xxx_reg_wait(struct ar8xxx_priv *priv, u32 reg, u32 mask, u32 val,
 337                 unsigned timeout)
 338 {
 339         int i;
 340
 341         for (i = 0; i < timeout; i++) {
 342                 u32 t;
 343
 344                 t = ar8xxx_read(priv, reg);
 345                 if ((t & mask) == val)
 346                         return 0;
 347
 348                 usleep_range(1000, 2000);
 349         }
 350
 351         return -ETIMEDOUT;
 352 }
 353
 354 static int
 355 ar8xxx_mib_op(struct ar8xxx_priv *priv, u32 op)
 356 {
 357         unsigned mib_func = priv->chip->mib_func;
 358         int ret;
 359
 360         lockdep_assert_held(&priv->mib_lock);
 361
 362         /* Capture the hardware statistics for all ports */
 363         ar8xxx_rmw(priv, mib_func, AR8216_MIB_FUNC, (op << AR8216_MIB_FUNC_S));
 364
 365         /* Wait for the capturing to complete. */
 366         ret = ar8xxx_reg_wait(priv, mib_func, AR8216_MIB_BUSY, 0, 10);
 367         if (ret)
 368                 goto out;
 369
 370         ret = 0;
 371
 372 out:
 373         return ret;
 374 }
 375
 376 static int
 377 ar8xxx_mib_capture(struct ar8xxx_priv *priv)
 378 {
 379         return ar8xxx_mib_op(priv, AR8216_MIB_FUNC_CAPTURE);
 380 }
 381
 382 static int
 383 ar8xxx_mib_flush(struct ar8xxx_priv *priv)
 384 {
 385         return ar8xxx_mib_op(priv, AR8216_MIB_FUNC_FLUSH);
 386 }
 387
 388 static void
 389 ar8xxx_mib_fetch_port_stat(struct ar8xxx_priv *priv, int port, bool flush)
 390 {
 391         unsigned int base;
 392         u64 *mib_stats;
 393         int i;
 394
 395         WARN_ON(port >= priv->dev.ports);
 396
 397         lockdep_assert_held(&priv->mib_lock);
 398
 399         base = priv->chip->reg_port_stats_start +
 400                priv->chip->reg_port_stats_length * port;
 401
 402         mib_stats = &priv->mib_stats[port * priv->chip->num_mibs];
 403         for (i = 0; i < priv->chip->num_mibs; i++) {
 404                 const struct ar8xxx_mib_desc *mib;
 405                 u64 t;
 406
 407                 mib = &priv->chip->mib_decs[i];
 408                 t = ar8xxx_read(priv, base + mib->offset);
 409                 if (mib->size == 2) {
 410                         u64 hi;
 411
 412                         hi = ar8xxx_read(priv, base + mib->offset + 4);
 413                         t |= hi << 32;
 414                 }
 415
 416                 if (flush)
 417                         mib_stats[i] = 0;
 418                 else
 419                         mib_stats[i] += t;
 420         }
 421 }
 422
 423 static void
 424 ar8216_read_port_link(struct ar8xxx_priv *priv, int port,
 425                       struct switch_port_link *link)
 426 {
 427         u32 status;
 428         u32 speed;
 429
 430         memset(link, '\0', sizeof(*link));
 431
 432         status = priv->chip->read_port_status(priv, port);
 433
 434         link->aneg = !!(status & AR8216_PORT_STATUS_LINK_AUTO);
 435         if (link->aneg) {
 436                 link->link = !!(status & AR8216_PORT_STATUS_LINK_UP);
 437         } else {
 438                 link->link = true;
 439
 440                 if (priv->get_port_link) {
 441                         int err;
 442
 443                         err = priv->get_port_link(port);
 444                         if (err >= 0)
 445                                 link->link = !!err;
 446                 }
 447         }
 448
 449         if (!link->link)
 450                 return;
 451
 452         link->duplex = !!(status & AR8216_PORT_STATUS_DUPLEX);
 453         link->tx_flow = !!(status & AR8216_PORT_STATUS_TXFLOW);
 454         link->rx_flow = !!(status & AR8216_PORT_STATUS_RXFLOW);
 455
 456         speed = (status & AR8216_PORT_STATUS_SPEED) >>
 457                  AR8216_PORT_STATUS_SPEED_S;
 458
 459         switch (speed) {
 460         case AR8216_PORT_SPEED_10M:
 461                 link->speed = SWITCH_PORT_SPEED_10;
 462                 break;
 463         case AR8216_PORT_SPEED_100M:
 464                 link->speed = SWITCH_PORT_SPEED_100;
 465                 break;
 466         case AR8216_PORT_SPEED_1000M:
 467                 link->speed = SWITCH_PORT_SPEED_1000;
 468                 break;
 469         default:
 470                 link->speed = SWITCH_PORT_SPEED_UNKNOWN;
 471                 break;
 472         }
 473 }
 474
 475 static struct sk_buff *
 476 ar8216_mangle_tx(struct net_device *dev, struct sk_buff *skb)
 477 {
 478         struct ar8xxx_priv *priv = dev->phy_ptr;
 479         unsigned char *buf;
 480
 481         if (unlikely(!priv))
 482                 goto error;
 483
 484         if (!priv->vlan)
 485                 goto send;
 486
 487         if (unlikely(skb_headroom(skb) < 2)) {
 488                 if (pskb_expand_head(skb, 2, 0, GFP_ATOMIC) < 0)
 489                         goto error;
 490         }
 491
 492         buf = skb_push(skb, 2);
 493         buf[0] = 0x10;
 494         buf[1] = 0x80;
 495
 496 send:
 497         return skb;
 498
 499 error:
 500         dev_kfree_skb_any(skb);
 501         return NULL;
 502 }
 503
 504 static void
 505 ar8216_mangle_rx(struct net_device *dev, struct sk_buff *skb)
 506 {
 507         struct ar8xxx_priv *priv;
 508         unsigned char *buf;
 509         int port, vlan;
 510
 511         priv = dev->phy_ptr;
 512         if (!priv)
 513                 return;
 514
 515         /* don't strip the header if vlan mode is disabled */
 516         if (!priv->vlan)
 517                 return;
 518
 519         /* strip header, get vlan id */
 520         buf = skb->data;
 521         skb_pull(skb, 2);
 522
 523         /* check for vlan header presence */
 524         if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
 525                 return;
 526
 527         port = buf[0] & 0xf;
 528
 529         /* no need to fix up packets coming from a tagged source */
 530         if (priv->vlan_tagged & (1 << port))
 531                 return;
 532
 533         /* lookup port vid from local table, the switch passes an invalid vlan id */
 534         vlan = priv->vlan_id[priv->pvid[port]];
 535
 536         buf[14 + 2] &= 0xf0;
 537         buf[14 + 2] |= vlan >> 8;
 538         buf[15 + 2] = vlan & 0xff;
 539 }
 540
 541 int
 542 ar8216_wait_bit(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
 543 {
 544         int timeout = 20;
 545         u32 t = 0;
 546
 547         while (1) {
 548                 t = ar8xxx_read(priv, reg);
 549                 if ((t & mask) == val)
 550                         return 0;
 551
 552                 if (timeout-- <= 0)
 553                         break;
 554
 555                 udelay(10);
 556         }
 557
 558         pr_err("ar8216: timeout on reg %08x: %08x & %08x != %08x\n",
 559                (unsigned int) reg, t, mask, val);
 560         return -ETIMEDOUT;
 561 }
 562
 563 static void
 564 ar8216_vtu_op(struct ar8xxx_priv *priv, u32 op, u32 val)
 565 {
 566         if (ar8216_wait_bit(priv, AR8216_REG_VTU, AR8216_VTU_ACTIVE, 0))
 567                 return;
 568         if ((op & AR8216_VTU_OP) == AR8216_VTU_OP_LOAD) {
 569                 val &= AR8216_VTUDATA_MEMBER;
 570                 val |= AR8216_VTUDATA_VALID;
 571                 ar8xxx_write(priv, AR8216_REG_VTU_DATA, val);
 572         }
 573         op |= AR8216_VTU_ACTIVE;
 574         ar8xxx_write(priv, AR8216_REG_VTU, op);
 575 }
 576
 577 static void
 578 ar8216_vtu_flush(struct ar8xxx_priv *priv)
 579 {
 580         ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
 581 }
 582
 583 static void
 584 ar8216_vtu_load_vlan(struct ar8xxx_priv *priv, u32 vid, u32 port_mask)
 585 {
 586         u32 op;
 587
 588         op = AR8216_VTU_OP_LOAD | (vid << AR8216_VTU_VID_S);
 589         ar8216_vtu_op(priv, op, port_mask);
 590 }
 591
 592 static int
 593 ar8216_atu_flush(struct ar8xxx_priv *priv)
 594 {
 595         int ret;
 596
 597         ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
 598         if (!ret)
 599                 ar8xxx_write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
 600
 601         return ret;
 602 }
 603
 604 static u32
 605 ar8216_read_port_status(struct ar8xxx_priv *priv, int port)
 606 {
 607         return ar8xxx_read(priv, AR8216_REG_PORT_STATUS(port));
 608 }
 609
 610 static void
 611 ar8216_setup_port(struct ar8xxx_priv *priv, int port, u32 members)
 612 {
 613         u32 header;
 614         u32 egress, ingress;
 615         u32 pvid;
 616
 617         if (priv->vlan) {
 618                 pvid = priv->vlan_id[priv->pvid[port]];
 619                 if (priv->vlan_tagged & (1 << port))
 620                         egress = AR8216_OUT_ADD_VLAN;
 621                 else
 622                         egress = AR8216_OUT_STRIP_VLAN;
 623                 ingress = AR8216_IN_SECURE;
 624         } else {
 625                 pvid = port;
 626                 egress = AR8216_OUT_KEEP;
 627                 ingress = AR8216_IN_PORT_ONLY;
 628         }
 629
 630         if (chip_is_ar8216(priv) && priv->vlan && port == AR8216_PORT_CPU)
 631                 header = AR8216_PORT_CTRL_HEADER;
 632         else
 633                 header = 0;
 634
 635         ar8xxx_rmw(priv, AR8216_REG_PORT_CTRL(port),
 636                    AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 637                    AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 638                    AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 639                    AR8216_PORT_CTRL_LEARN | header |
 640                    (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 641                    (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 642
 643         ar8xxx_rmw(priv, AR8216_REG_PORT_VLAN(port),
 644                    AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
 645                    AR8216_PORT_VLAN_DEFAULT_ID,
 646                    (members << AR8216_PORT_VLAN_DEST_PORTS_S) |
 647                    (ingress << AR8216_PORT_VLAN_MODE_S) |
 648                    (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
 649 }
 650
 651 static int
 652 ar8216_hw_init(struct ar8xxx_priv *priv)
 653 {
 654         if (priv->initialized)
 655                 return 0;
 656
 657         ar8xxx_phy_init(priv);
 658
 659         priv->initialized = true;
 660         return 0;
 661 }
 662
 663 static void
 664 ar8216_init_globals(struct ar8xxx_priv *priv)
 665 {
 666         /* standard atheros magic */
 667         ar8xxx_write(priv, 0x38, 0xc000050e);
 668
 669         ar8xxx_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 670                    AR8216_GCTRL_MTU, 1518 + 8 + 2);
 671 }
 672
 673 static void
 674 ar8216_init_port(struct ar8xxx_priv *priv, int port)
 675 {
 676         /* Enable port learning and tx */
 677         ar8xxx_write(priv, AR8216_REG_PORT_CTRL(port),
 678                 AR8216_PORT_CTRL_LEARN |
 679                 (4 << AR8216_PORT_CTRL_STATE_S));
 680
 681         ar8xxx_write(priv, AR8216_REG_PORT_VLAN(port), 0);
 682
 683         if (port == AR8216_PORT_CPU) {
 684                 ar8xxx_write(priv, AR8216_REG_PORT_STATUS(port),
 685                         AR8216_PORT_STATUS_LINK_UP |
 686                         (ar8xxx_has_gige(priv) ?
 687                                 AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
 688                         AR8216_PORT_STATUS_TXMAC |
 689                         AR8216_PORT_STATUS_RXMAC |
 690                         (chip_is_ar8316(priv) ? AR8216_PORT_STATUS_RXFLOW : 0) |
 691                         (chip_is_ar8316(priv) ? AR8216_PORT_STATUS_TXFLOW : 0) |
 692                         AR8216_PORT_STATUS_DUPLEX);
 693         } else {
 694                 ar8xxx_write(priv, AR8216_REG_PORT_STATUS(port),
 695                         AR8216_PORT_STATUS_LINK_AUTO);
 696         }
 697 }
 698
 699 static void
 700 ar8236_setup_port(struct ar8xxx_priv *priv, int port, u32 members)
 701 {
 702         u32 egress, ingress;
 703         u32 pvid;
 704
 705         if (priv->vlan) {
 706                 pvid = priv->vlan_id[priv->pvid[port]];
 707                 if (priv->vlan_tagged & (1 << port))
 708                         egress = AR8216_OUT_ADD_VLAN;
 709                 else
 710                         egress = AR8216_OUT_STRIP_VLAN;
 711                 ingress = AR8216_IN_SECURE;
 712         } else {
 713                 pvid = port;
 714                 egress = AR8216_OUT_KEEP;
 715                 ingress = AR8216_IN_PORT_ONLY;
 716         }
 717
 718         ar8xxx_rmw(priv, AR8216_REG_PORT_CTRL(port),
 719                    AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
 720                    AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
 721                    AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
 722                    AR8216_PORT_CTRL_LEARN |
 723                    (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
 724                    (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
 725
 726         ar8xxx_rmw(priv, AR8236_REG_PORT_VLAN(port),
 727                    AR8236_PORT_VLAN_DEFAULT_ID,
 728                    (pvid << AR8236_PORT_VLAN_DEFAULT_ID_S));
 729
 730         ar8xxx_rmw(priv, AR8236_REG_PORT_VLAN2(port),
 731                    AR8236_PORT_VLAN2_VLAN_MODE |
 732                    AR8236_PORT_VLAN2_MEMBER,
 733                    (ingress << AR8236_PORT_VLAN2_VLAN_MODE_S) |
 734                    (members << AR8236_PORT_VLAN2_MEMBER_S));
 735 }
 736
 737 static void
 738 ar8236_init_globals(struct ar8xxx_priv *priv)
 739 {
 740         /* enable jumbo frames */
 741         ar8xxx_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 742                    AR8316_GCTRL_MTU, 9018 + 8 + 2);
 743
 744         /* enable cpu port to receive arp frames */
 745         ar8xxx_reg_set(priv, AR8216_REG_ATU_CTRL,
 746                    AR8236_ATU_CTRL_RES);
 747
 748         /* enable cpu port to receive multicast and broadcast frames */
 749         ar8xxx_reg_set(priv, AR8216_REG_FLOOD_MASK,
 750                    AR8236_FM_CPU_BROADCAST_EN | AR8236_FM_CPU_BCAST_FWD_EN);
 751
 752         /* Enable MIB counters */
 753         ar8xxx_rmw(priv, AR8216_REG_MIB_FUNC, AR8216_MIB_FUNC | AR8236_MIB_EN,
 754                    (AR8216_MIB_FUNC_NO_OP << AR8216_MIB_FUNC_S) |
 755                    AR8236_MIB_EN);
 756 }
 757
 758 static int
 759 ar8316_hw_init(struct ar8xxx_priv *priv)
 760 {
 761         u32 val, newval;
 762
 763         val = ar8xxx_read(priv, AR8316_REG_POSTRIP);
 764
 765         if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 766                 if (priv->port4_phy) {
 767                         /* value taken from Ubiquiti RouterStation Pro */
 768                         newval = 0x81461bea;
 769                         pr_info("ar8316: Using port 4 as PHY\n");
 770                 } else {
 771                         newval = 0x01261be2;
 772                         pr_info("ar8316: Using port 4 as switch port\n");
 773                 }
 774         } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
 775                 /* value taken from AVM Fritz!Box 7390 sources */
 776                 newval = 0x010e5b71;
 777         } else {
 778                 /* no known value for phy interface */
 779                 pr_err("ar8316: unsupported mii mode: %d.\n",
 780                        priv->phy->interface);
 781                 return -EINVAL;
 782         }
 783
 784         if (val == newval)
 785                 goto out;
 786
 787         ar8xxx_write(priv, AR8316_REG_POSTRIP, newval);
 788
 789         if (priv->port4_phy &&
 790             priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
 791                 /* work around for phy4 rgmii mode */
 792                 ar8xxx_phy_dbg_write(priv, 4, 0x12, 0x480c);
 793                 /* rx delay */
 794                 ar8xxx_phy_dbg_write(priv, 4, 0x0, 0x824e);
 795                 /* tx delay */
 796                 ar8xxx_phy_dbg_write(priv, 4, 0x5, 0x3d47);
 797                 msleep(1000);
 798         }
 799
 800         ar8xxx_phy_init(priv);
 801
 802 out:
 803         priv->initialized = true;
 804         return 0;
 805 }
 806
 807 static void
 808 ar8316_init_globals(struct ar8xxx_priv *priv)
 809 {
 810         /* standard atheros magic */
 811         ar8xxx_write(priv, 0x38, 0xc000050e);
 812
 813         /* enable cpu port to receive multicast and broadcast frames */
 814         ar8xxx_write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
 815
 816         /* enable jumbo frames */
 817         ar8xxx_rmw(priv, AR8216_REG_GLOBAL_CTRL,
 818                    AR8316_GCTRL_MTU, 9018 + 8 + 2);
 819
 820         /* Enable MIB counters */
 821         ar8xxx_rmw(priv, AR8216_REG_MIB_FUNC, AR8216_MIB_FUNC | AR8236_MIB_EN,
 822                    (AR8216_MIB_FUNC_NO_OP << AR8216_MIB_FUNC_S) |
 823                    AR8236_MIB_EN);
 824 }
 825
 826 int
 827 ar8xxx_sw_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 828                    struct switch_val *val)
 829 {
 830         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 831         priv->vlan = !!val->value.i;
 832         return 0;
 833 }
 834
 835 int
 836 ar8xxx_sw_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
 837                    struct switch_val *val)
 838 {
 839         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 840         val->value.i = priv->vlan;
 841         return 0;
 842 }
 843
 844
 845 int
 846 ar8xxx_sw_set_pvid(struct switch_dev *dev, int port, int vlan)
 847 {
 848         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 849
 850         /* make sure no invalid PVIDs get set */
 851
 852         if (vlan >= dev->vlans)
 853                 return -EINVAL;
 854
 855         priv->pvid[port] = vlan;
 856         return 0;
 857 }
 858
 859 int
 860 ar8xxx_sw_get_pvid(struct switch_dev *dev, int port, int *vlan)
 861 {
 862         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 863         *vlan = priv->pvid[port];
 864         return 0;
 865 }
 866
 867 static int
 868 ar8xxx_sw_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
 869                   struct switch_val *val)
 870 {
 871         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 872         priv->vlan_id[val->port_vlan] = val->value.i;
 873         return 0;
 874 }
 875
 876 static int
 877 ar8xxx_sw_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
 878                   struct switch_val *val)
 879 {
 880         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 881         val->value.i = priv->vlan_id[val->port_vlan];
 882         return 0;
 883 }
 884
 885 int
 886 ar8xxx_sw_get_port_link(struct switch_dev *dev, int port,
 887                         struct switch_port_link *link)
 888 {
 889         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 890
 891         ar8216_read_port_link(priv, port, link);
 892         return 0;
 893 }
 894
 895 static int
 896 ar8xxx_sw_get_ports(struct switch_dev *dev, struct switch_val *val)
 897 {
 898         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 899         u8 ports = priv->vlan_table[val->port_vlan];
 900         int i;
 901
 902         val->len = 0;
 903         for (i = 0; i < dev->ports; i++) {
 904                 struct switch_port *p;
 905
 906                 if (!(ports & (1 << i)))
 907                         continue;
 908
 909                 p = &val->value.ports[val->len++];
 910                 p->id = i;
 911                 if (priv->vlan_tagged & (1 << i))
 912                         p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
 913                 else
 914                         p->flags = 0;
 915         }
 916         return 0;
 917 }
 918
 919 static int
 920 ar8xxx_sw_set_ports(struct switch_dev *dev, struct switch_val *val)
 921 {
 922         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 923         u8 *vt = &priv->vlan_table[val->port_vlan];
 924         int i, j;
 925
 926         *vt = 0;
 927         for (i = 0; i < val->len; i++) {
 928                 struct switch_port *p = &val->value.ports[i];
 929
 930                 if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED)) {
 931                         priv->vlan_tagged |= (1 << p->id);
 932                 } else {
 933                         priv->vlan_tagged &= ~(1 << p->id);
 934                         priv->pvid[p->id] = val->port_vlan;
 935
 936                         /* make sure that an untagged port does not
 937                          * appear in other vlans */
 938                         for (j = 0; j < AR8X16_MAX_VLANS; j++) {
 939                                 if (j == val->port_vlan)
 940                                         continue;
 941                                 priv->vlan_table[j] &= ~(1 << p->id);
 942                         }
 943                 }
 944
 945                 *vt |= 1 << p->id;
 946         }
 947         return 0;
 948 }
 949
 950 static void
 951 ar8216_set_mirror_regs(struct ar8xxx_priv *priv)
 952 {
 953         int port;
 954
 955         /* reset all mirror registers */
 956         ar8xxx_rmw(priv, AR8216_REG_GLOBAL_CPUPORT,
 957                    AR8216_GLOBAL_CPUPORT_MIRROR_PORT,
 958                    (0xF << AR8216_GLOBAL_CPUPORT_MIRROR_PORT_S));
 959         for (port = 0; port < AR8216_NUM_PORTS; port++) {
 960                 ar8xxx_rmw(priv, AR8216_REG_PORT_CTRL(port),
 961                            AR8216_PORT_CTRL_MIRROR_RX,
 962                            0);
 963
 964                 ar8xxx_rmw(priv, AR8216_REG_PORT_CTRL(port),
 965                            AR8216_PORT_CTRL_MIRROR_TX,
 966                            0);
 967         }
 968
 969         /* now enable mirroring if necessary */
 970         if (priv->source_port >= AR8216_NUM_PORTS ||
 971             priv->monitor_port >= AR8216_NUM_PORTS ||
 972             priv->source_port == priv->monitor_port) {
 973                 return;
 974         }
 975
 976         ar8xxx_rmw(priv, AR8216_REG_GLOBAL_CPUPORT,
 977                    AR8216_GLOBAL_CPUPORT_MIRROR_PORT,
 978                    (priv->monitor_port << AR8216_GLOBAL_CPUPORT_MIRROR_PORT_S));
 979
 980         if (priv->mirror_rx)
 981                 ar8xxx_reg_set(priv, AR8216_REG_PORT_CTRL(priv->source_port),
 982                            AR8216_PORT_CTRL_MIRROR_RX);
 983
 984         if (priv->mirror_tx)
 985                 ar8xxx_reg_set(priv, AR8216_REG_PORT_CTRL(priv->source_port),
 986                            AR8216_PORT_CTRL_MIRROR_TX);
 987 }
 988
 989 int
 990 ar8xxx_sw_hw_apply(struct switch_dev *dev)
 991 {
 992         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
 993         u8 portmask[AR8X16_MAX_PORTS];
 994         int i, j;
 995
 996         mutex_lock(&priv->reg_mutex);
 997         /* flush all vlan translation unit entries */
 998         priv->chip->vtu_flush(priv);
 999
1000         memset(portmask, 0, sizeof(portmask));
1001         if (!priv->init) {
1002                 /* calculate the port destination masks and load vlans
1003                  * into the vlan translation unit */
1004                 for (j = 0; j < AR8X16_MAX_VLANS; j++) {
1005                         u8 vp = priv->vlan_table[j];
1006
1007                         if (!vp)
1008                                 continue;
1009
1010                         for (i = 0; i < dev->ports; i++) {
1011                                 u8 mask = (1 << i);
1012                                 if (vp & mask)
1013                                         portmask[i] |= vp & ~mask;
1014                         }
1015
1016                         priv->chip->vtu_load_vlan(priv, priv->vlan_id[j],
1017                                                  priv->vlan_table[j]);
1018                 }
1019         } else {
1020                 /* vlan disabled:
1021                  * isolate all ports, but connect them to the cpu port */
1022                 for (i = 0; i < dev->ports; i++) {
1023                         if (i == AR8216_PORT_CPU)
1024                                 continue;
1025
1026                         portmask[i] = 1 << AR8216_PORT_CPU;
1027                         portmask[AR8216_PORT_CPU] |= (1 << i);
1028                 }
1029         }
1030
1031         /* update the port destination mask registers and tag settings */
1032         for (i = 0; i < dev->ports; i++) {
1033                 priv->chip->setup_port(priv, i, portmask[i]);
1034         }
1035
1036         priv->chip->set_mirror_regs(priv);
1037
1038         mutex_unlock(&priv->reg_mutex);
1039         return 0;
1040 }
1041
1042 int
1043 ar8xxx_sw_reset_switch(struct switch_dev *dev)
1044 {
1045         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1046         int i;
1047
1048         mutex_lock(&priv->reg_mutex);
1049         memset(&priv->vlan, 0, sizeof(struct ar8xxx_priv) -
1050                 offsetof(struct ar8xxx_priv, vlan));
1051
1052         for (i = 0; i < AR8X16_MAX_VLANS; i++)
1053                 priv->vlan_id[i] = i;
1054
1055         /* Configure all ports */
1056         for (i = 0; i < dev->ports; i++)
1057                 priv->chip->init_port(priv, i);
1058
1059         priv->mirror_rx = false;
1060         priv->mirror_tx = false;
1061         priv->source_port = 0;
1062         priv->monitor_port = 0;
1063
1064         priv->chip->init_globals(priv);
1065
1066         mutex_unlock(&priv->reg_mutex);
1067
1068         return ar8xxx_sw_hw_apply(dev);
1069 }
1070
1071 int
1072 ar8xxx_sw_set_reset_mibs(struct switch_dev *dev,
1073                          const struct switch_attr *attr,
1074                          struct switch_val *val)
1075 {
1076         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1077         unsigned int len;
1078         int ret;
1079
1080         if (!ar8xxx_has_mib_counters(priv))
1081                 return -EOPNOTSUPP;
1082
1083         mutex_lock(&priv->mib_lock);
1084
1085         len = priv->dev.ports * priv->chip->num_mibs *
1086               sizeof(*priv->mib_stats);
1087         memset(priv->mib_stats, '\0', len);
1088         ret = ar8xxx_mib_flush(priv);
1089         if (ret)
1090                 goto unlock;
1091
1092         ret = 0;
1093
1094 unlock:
1095         mutex_unlock(&priv->mib_lock);
1096         return ret;
1097 }
1098
1099 int
1100 ar8xxx_sw_set_mirror_rx_enable(struct switch_dev *dev,
1101                                const struct switch_attr *attr,
1102                                struct switch_val *val)
1103 {
1104         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1105
1106         mutex_lock(&priv->reg_mutex);
1107         priv->mirror_rx = !!val->value.i;
1108         priv->chip->set_mirror_regs(priv);
1109         mutex_unlock(&priv->reg_mutex);
1110
1111         return 0;
1112 }
1113
1114 int
1115 ar8xxx_sw_get_mirror_rx_enable(struct switch_dev *dev,
1116                                const struct switch_attr *attr,
1117                                struct switch_val *val)
1118 {
1119         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1120         val->value.i = priv->mirror_rx;
1121         return 0;
1122 }
1123
1124 int
1125 ar8xxx_sw_set_mirror_tx_enable(struct switch_dev *dev,
1126                                const struct switch_attr *attr,
1127                                struct switch_val *val)
1128 {
1129         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1130
1131         mutex_lock(&priv->reg_mutex);
1132         priv->mirror_tx = !!val->value.i;
1133         priv->chip->set_mirror_regs(priv);
1134         mutex_unlock(&priv->reg_mutex);
1135
1136         return 0;
1137 }
1138
1139 int
1140 ar8xxx_sw_get_mirror_tx_enable(struct switch_dev *dev,
1141                                const struct switch_attr *attr,
1142                                struct switch_val *val)
1143 {
1144         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1145         val->value.i = priv->mirror_tx;
1146         return 0;
1147 }
1148
1149 int
1150 ar8xxx_sw_set_mirror_monitor_port(struct switch_dev *dev,
1151                                   const struct switch_attr *attr,
1152                                   struct switch_val *val)
1153 {
1154         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1155
1156         mutex_lock(&priv->reg_mutex);
1157         priv->monitor_port = val->value.i;
1158         priv->chip->set_mirror_regs(priv);
1159         mutex_unlock(&priv->reg_mutex);
1160
1161         return 0;
1162 }
1163
1164 int
1165 ar8xxx_sw_get_mirror_monitor_port(struct switch_dev *dev,
1166                                   const struct switch_attr *attr,
1167                                   struct switch_val *val)
1168 {
1169         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1170         val->value.i = priv->monitor_port;
1171         return 0;
1172 }
1173
1174 int
1175 ar8xxx_sw_set_mirror_source_port(struct switch_dev *dev,
1176                                  const struct switch_attr *attr,
1177                                  struct switch_val *val)
1178 {
1179         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1180
1181         mutex_lock(&priv->reg_mutex);
1182         priv->source_port = val->value.i;
1183         priv->chip->set_mirror_regs(priv);
1184         mutex_unlock(&priv->reg_mutex);
1185
1186         return 0;
1187 }
1188
1189 int
1190 ar8xxx_sw_get_mirror_source_port(struct switch_dev *dev,
1191                                  const struct switch_attr *attr,
1192                                  struct switch_val *val)
1193 {
1194         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1195         val->value.i = priv->source_port;
1196         return 0;
1197 }
1198
1199 static int
1200 ar8xxx_sw_set_port_reset_mib(struct switch_dev *dev,
1201                              const struct switch_attr *attr,
1202                              struct switch_val *val)
1203 {
1204         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1205         int port;
1206         int ret;
1207
1208         if (!ar8xxx_has_mib_counters(priv))
1209                 return -EOPNOTSUPP;
1210
1211         port = val->port_vlan;
1212         if (port >= dev->ports)
1213                 return -EINVAL;
1214
1215         mutex_lock(&priv->mib_lock);
1216         ret = ar8xxx_mib_capture(priv);
1217         if (ret)
1218                 goto unlock;
1219
1220         ar8xxx_mib_fetch_port_stat(priv, port, true);
1221
1222         ret = 0;
1223
1224 unlock:
1225         mutex_unlock(&priv->mib_lock);
1226         return ret;
1227 }
1228
1229 static int
1230 ar8xxx_sw_get_port_mib(struct switch_dev *dev,
1231                        const struct switch_attr *attr,
1232                        struct switch_val *val)
1233 {
1234         struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
1235         const struct ar8xxx_chip *chip = priv->chip;
1236         u64 *mib_stats;
1237         int port;
1238         int ret;
1239         char *buf = priv->buf;
1240         int i, len = 0;
1241
1242         if (!ar8xxx_has_mib_counters(priv))
1243                 return -EOPNOTSUPP;
1244
1245         port = val->port_vlan;
1246         if (port >= dev->ports)
1247                 return -EINVAL;
1248
1249         mutex_lock(&priv->mib_lock);
1250         ret = ar8xxx_mib_capture(priv);
1251         if (ret)
1252                 goto unlock;
1253
1254         ar8xxx_mib_fetch_port_stat(priv, port, false);
1255
1256         len += snprintf(buf + len, sizeof(priv->buf) - len,
1257                         "Port %d MIB counters\n",
1258                         port);
1259
1260         mib_stats = &priv->mib_stats[port * chip->num_mibs];
1261         for (i = 0; i < chip->num_mibs; i++)
1262                 len += snprintf(buf + len, sizeof(priv->buf) - len,
1263                                 "%-12s: %llu\n",
1264                                 chip->mib_decs[i].name,
1265                                 mib_stats[i]);
1266
1267         val->value.s = buf;
1268         val->len = len;
1269
1270         ret = 0;
1271
1272 unlock:
1273         mutex_unlock(&priv->mib_lock);
1274         return ret;
1275 }
1276
1277 static const struct switch_attr ar8xxx_sw_attr_globals[] = {
1278         {
1279                 .type = SWITCH_TYPE_INT,
1280                 .name = "enable_vlan",
1281                 .description = "Enable VLAN mode",
1282                 .set = ar8xxx_sw_set_vlan,
1283                 .get = ar8xxx_sw_get_vlan,
1284                 .max = 1
1285         },
1286         {
1287                 .type = SWITCH_TYPE_NOVAL,
1288                 .name = "reset_mibs",
1289                 .description = "Reset all MIB counters",
1290                 .set = ar8xxx_sw_set_reset_mibs,
1291         },
1292         {
1293                 .type = SWITCH_TYPE_INT,
1294                 .name = "enable_mirror_rx",
1295                 .description = "Enable mirroring of RX packets",
1296                 .set = ar8xxx_sw_set_mirror_rx_enable,
1297                 .get = ar8xxx_sw_get_mirror_rx_enable,
1298                 .max = 1
1299         },
1300         {
1301                 .type = SWITCH_TYPE_INT,
1302                 .name = "enable_mirror_tx",
1303                 .description = "Enable mirroring of TX packets",
1304                 .set = ar8xxx_sw_set_mirror_tx_enable,
1305                 .get = ar8xxx_sw_get_mirror_tx_enable,
1306                 .max = 1
1307         },
1308         {
1309                 .type = SWITCH_TYPE_INT,
1310                 .name = "mirror_monitor_port",
1311                 .description = "Mirror monitor port",
1312                 .set = ar8xxx_sw_set_mirror_monitor_port,
1313                 .get = ar8xxx_sw_get_mirror_monitor_port,
1314                 .max = AR8216_NUM_PORTS - 1
1315         },
1316         {
1317                 .type = SWITCH_TYPE_INT,
1318                 .name = "mirror_source_port",
1319                 .description = "Mirror source port",
1320                 .set = ar8xxx_sw_set_mirror_source_port,
1321                 .get = ar8xxx_sw_get_mirror_source_port,
1322                 .max = AR8216_NUM_PORTS - 1
1323         },
1324 };
1325
1326 const struct switch_attr ar8xxx_sw_attr_port[2] = {
1327         {
1328                 .type = SWITCH_TYPE_NOVAL,
1329                 .name = "reset_mib",
1330                 .description = "Reset single port MIB counters",
1331                 .set = ar8xxx_sw_set_port_reset_mib,
1332         },
1333         {
1334                 .type = SWITCH_TYPE_STRING,
1335                 .name = "mib",
1336                 .description = "Get port's MIB counters",
1337                 .set = NULL,
1338                 .get = ar8xxx_sw_get_port_mib,
1339         },
1340 };
1341
1342 const struct switch_attr ar8xxx_sw_attr_vlan[1] = {
1343         {
1344                 .type = SWITCH_TYPE_INT,
1345                 .name = "vid",
1346                 .description = "VLAN ID (0-4094)",
1347                 .set = ar8xxx_sw_set_vid,
1348                 .get = ar8xxx_sw_get_vid,
1349                 .max = 4094,
1350         },
1351 };
1352
1353 static const struct switch_dev_ops ar8xxx_sw_ops = {
1354         .attr_global = {
1355                 .attr = ar8xxx_sw_attr_globals,
1356                 .n_attr = ARRAY_SIZE(ar8xxx_sw_attr_globals),
1357         },
1358         .attr_port = {
1359                 .attr = ar8xxx_sw_attr_port,
1360                 .n_attr = ARRAY_SIZE(ar8xxx_sw_attr_port),
1361         },
1362         .attr_vlan = {
1363                 .attr = ar8xxx_sw_attr_vlan,
1364                 .n_attr = ARRAY_SIZE(ar8xxx_sw_attr_vlan),
1365         },
1366         .get_port_pvid = ar8xxx_sw_get_pvid,
1367         .set_port_pvid = ar8xxx_sw_set_pvid,
1368         .get_vlan_ports = ar8xxx_sw_get_ports,
1369         .set_vlan_ports = ar8xxx_sw_set_ports,
1370         .apply_config = ar8xxx_sw_hw_apply,
1371         .reset_switch = ar8xxx_sw_reset_switch,
1372         .get_port_link = ar8xxx_sw_get_port_link,
1373 };
1374
1375 static const struct ar8xxx_chip ar8216_chip = {
1376         .caps = AR8XXX_CAP_MIB_COUNTERS,
1377
1378         .reg_port_stats_start = 0x19000,
1379         .reg_port_stats_length = 0xa0,
1380
1381         .name = "Atheros AR8216",
1382         .ports = AR8216_NUM_PORTS,
1383         .vlans = AR8216_NUM_VLANS,
1384         .swops = &ar8xxx_sw_ops,
1385
1386         .hw_init = ar8216_hw_init,
1387         .init_globals = ar8216_init_globals,
1388         .init_port = ar8216_init_port,
1389         .setup_port = ar8216_setup_port,
1390         .read_port_status = ar8216_read_port_status,
1391         .atu_flush = ar8216_atu_flush,
1392         .vtu_flush = ar8216_vtu_flush,
1393         .vtu_load_vlan = ar8216_vtu_load_vlan,
1394         .set_mirror_regs = ar8216_set_mirror_regs,
1395
1396         .num_mibs = ARRAY_SIZE(ar8216_mibs),
1397         .mib_decs = ar8216_mibs,
1398         .mib_func = AR8216_REG_MIB_FUNC
1399 };
1400
1401 static const struct ar8xxx_chip ar8236_chip = {
1402         .caps = AR8XXX_CAP_MIB_COUNTERS,
1403
1404         .reg_port_stats_start = 0x20000,
1405         .reg_port_stats_length = 0x100,
1406
1407         .name = "Atheros AR8236",
1408         .ports = AR8216_NUM_PORTS,
1409         .vlans = AR8216_NUM_VLANS,
1410         .swops = &ar8xxx_sw_ops,
1411
1412         .hw_init = ar8216_hw_init,
1413         .init_globals = ar8236_init_globals,
1414         .init_port = ar8216_init_port,
1415         .setup_port = ar8236_setup_port,
1416         .read_port_status = ar8216_read_port_status,
1417         .atu_flush = ar8216_atu_flush,
1418         .vtu_flush = ar8216_vtu_flush,
1419         .vtu_load_vlan = ar8216_vtu_load_vlan,
1420         .set_mirror_regs = ar8216_set_mirror_regs,
1421
1422         .num_mibs = ARRAY_SIZE(ar8236_mibs),
1423         .mib_decs = ar8236_mibs,
1424         .mib_func = AR8216_REG_MIB_FUNC
1425 };
1426
1427 static const struct ar8xxx_chip ar8316_chip = {
1428         .caps = AR8XXX_CAP_GIGE | AR8XXX_CAP_MIB_COUNTERS,
1429
1430         .reg_port_stats_start = 0x20000,
1431         .reg_port_stats_length = 0x100,
1432
1433         .name = "Atheros AR8316",
1434         .ports = AR8216_NUM_PORTS,
1435         .vlans = AR8X16_MAX_VLANS,
1436         .swops = &ar8xxx_sw_ops,
1437
1438         .hw_init = ar8316_hw_init,
1439         .init_globals = ar8316_init_globals,
1440         .init_port = ar8216_init_port,
1441         .setup_port = ar8216_setup_port,
1442         .read_port_status = ar8216_read_port_status,
1443         .atu_flush = ar8216_atu_flush,
1444         .vtu_flush = ar8216_vtu_flush,
1445         .vtu_load_vlan = ar8216_vtu_load_vlan,
1446         .set_mirror_regs = ar8216_set_mirror_regs,
1447
1448         .num_mibs = ARRAY_SIZE(ar8236_mibs),
1449         .mib_decs = ar8236_mibs,
1450         .mib_func = AR8216_REG_MIB_FUNC
1451 };
1452
1453 static int
1454 ar8xxx_id_chip(struct ar8xxx_priv *priv)
1455 {
1456         u32 val;
1457         u16 id;
1458         int i;
1459
1460         val = ar8xxx_read(priv, AR8216_REG_CTRL);
1461         if (val == ~0)
1462                 return -ENODEV;
1463
1464         id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
1465         for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
1466                 u16 t;
1467
1468                 val = ar8xxx_read(priv, AR8216_REG_CTRL);
1469                 if (val == ~0)
1470                         return -ENODEV;
1471
1472                 t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
1473                 if (t != id)
1474                         return -ENODEV;
1475         }
1476
1477         priv->chip_ver = (id & AR8216_CTRL_VERSION) >> AR8216_CTRL_VERSION_S;
1478         priv->chip_rev = (id & AR8216_CTRL_REVISION);
1479
1480         switch (priv->chip_ver) {
1481         case AR8XXX_VER_AR8216:
1482                 priv->chip = &ar8216_chip;
1483                 break;
1484         case AR8XXX_VER_AR8236:
1485                 priv->chip = &ar8236_chip;
1486                 break;
1487         case AR8XXX_VER_AR8316:
1488                 priv->chip = &ar8316_chip;
1489                 break;
1490         case AR8XXX_VER_AR8327:
1491                 priv->chip = &ar8327_chip;
1492                 break;
1493         case AR8XXX_VER_AR8337:
1494                 priv->chip = &ar8337_chip;
1495                 break;
1496         default:
1497                 pr_err("ar8216: Unknown Atheros device [ver=%d, rev=%d]\n",
1498                        priv->chip_ver, priv->chip_rev);
1499
1500                 return -ENODEV;
1501         }
1502
1503         return 0;
1504 }
1505
1506 static void
1507 ar8xxx_mib_work_func(struct work_struct *work)
1508 {
1509         struct ar8xxx_priv *priv;
1510         int err;
1511
1512         priv = container_of(work, struct ar8xxx_priv, mib_work.work);
1513
1514         mutex_lock(&priv->mib_lock);
1515
1516         err = ar8xxx_mib_capture(priv);
1517         if (err)
1518                 goto next_port;
1519
1520         ar8xxx_mib_fetch_port_stat(priv, priv->mib_next_port, false);
1521
1522 next_port:
1523         priv->mib_next_port++;
1524         if (priv->mib_next_port >= priv->dev.ports)
1525                 priv->mib_next_port = 0;
1526
1527         mutex_unlock(&priv->mib_lock);
1528         schedule_delayed_work(&priv->mib_work,
1529                               msecs_to_jiffies(AR8XXX_MIB_WORK_DELAY));
1530 }
1531
1532 static int
1533 ar8xxx_mib_init(struct ar8xxx_priv *priv)
1534 {
1535         unsigned int len;
1536
1537         if (!ar8xxx_has_mib_counters(priv))
1538                 return 0;
1539
1540         BUG_ON(!priv->chip->mib_decs || !priv->chip->num_mibs);
1541
1542         len = priv->dev.ports * priv->chip->num_mibs *
1543               sizeof(*priv->mib_stats);
1544         priv->mib_stats = kzalloc(len, GFP_KERNEL);
1545
1546         if (!priv->mib_stats)
1547                 return -ENOMEM;
1548
1549         return 0;
1550 }
1551
1552 static void
1553 ar8xxx_mib_start(struct ar8xxx_priv *priv)
1554 {
1555         if (!ar8xxx_has_mib_counters(priv))
1556                 return;
1557
1558         schedule_delayed_work(&priv->mib_work,
1559                               msecs_to_jiffies(AR8XXX_MIB_WORK_DELAY));
1560 }
1561
1562 static void
1563 ar8xxx_mib_stop(struct ar8xxx_priv *priv)
1564 {
1565         if (!ar8xxx_has_mib_counters(priv))
1566                 return;
1567
1568         cancel_delayed_work(&priv->mib_work);
1569 }
1570
1571 static struct ar8xxx_priv *
1572 ar8xxx_create(void)
1573 {
1574         struct ar8xxx_priv *priv;
1575
1576         priv = kzalloc(sizeof(struct ar8xxx_priv), GFP_KERNEL);
1577         if (priv == NULL)
1578                 return NULL;
1579
1580         mutex_init(&priv->reg_mutex);
1581         mutex_init(&priv->mib_lock);
1582         INIT_DELAYED_WORK(&priv->mib_work, ar8xxx_mib_work_func);
1583
1584         return priv;
1585 }
1586
1587 static void
1588 ar8xxx_free(struct ar8xxx_priv *priv)
1589 {
1590         if (priv->chip && priv->chip->cleanup)
1591                 priv->chip->cleanup(priv);
1592
1593         kfree(priv->chip_data);
1594         kfree(priv->mib_stats);
1595         kfree(priv);
1596 }
1597
1598 static int
1599 ar8xxx_probe_switch(struct ar8xxx_priv *priv)
1600 {
1601         const struct ar8xxx_chip *chip;
1602         struct switch_dev *swdev;
1603         int ret;
1604
1605         ret = ar8xxx_id_chip(priv);
1606         if (ret)
1607                 return ret;
1608
1609         chip = priv->chip;
1610
1611         swdev = &priv->dev;
1612         swdev->cpu_port = AR8216_PORT_CPU;
1613         swdev->name = chip->name;
1614         swdev->vlans = chip->vlans;
1615         swdev->ports = chip->ports;
1616         swdev->ops = chip->swops;
1617
1618         ret = ar8xxx_mib_init(priv);
1619         if (ret)
1620                 return ret;
1621
1622         return 0;
1623 }
1624
1625 static int
1626 ar8xxx_start(struct ar8xxx_priv *priv)
1627 {
1628         int ret;
1629
1630         priv->init = true;
1631
1632         ret = priv->chip->hw_init(priv);
1633         if (ret)
1634                 return ret;
1635
1636         ret = ar8xxx_sw_reset_switch(&priv->dev);
1637         if (ret)
1638                 return ret;
1639
1640         priv->init = false;
1641
1642         ar8xxx_mib_start(priv);
1643
1644         return 0;
1645 }
1646
1647 static int
1648 ar8xxx_phy_config_init(struct phy_device *phydev)
1649 {
1650         struct ar8xxx_priv *priv = phydev->priv;
1651         struct net_device *dev = phydev->attached_dev;
1652         int ret;
1653
1654         if (WARN_ON(!priv))
1655                 return -ENODEV;
1656
1657         if (priv->chip->config_at_probe)
1658                 return ar8xxx_phy_check_aneg(phydev);
1659
1660         priv->phy = phydev;
1661
1662         if (phydev->addr != 0) {
1663                 if (chip_is_ar8316(priv)) {
1664                         /* switch device has been initialized, reinit */
1665                         priv->dev.ports = (AR8216_NUM_PORTS - 1);
1666                         priv->initialized = false;
1667                         priv->port4_phy = true;
1668                         ar8316_hw_init(priv);
1669                         return 0;
1670                 }
1671
1672                 return 0;
1673         }
1674
1675         ret = ar8xxx_start(priv);
1676         if (ret)
1677                 return ret;
1678
1679         /* VID fixup only needed on ar8216 */
1680         if (chip_is_ar8216(priv)) {
1681                 dev->phy_ptr = priv;
1682                 dev->priv_flags |= IFF_NO_IP_ALIGN;
1683                 dev->eth_mangle_rx = ar8216_mangle_rx;
1684                 dev->eth_mangle_tx = ar8216_mangle_tx;
1685         }
1686
1687         return 0;
1688 }
1689
1690 static int
1691 ar8xxx_phy_read_status(struct phy_device *phydev)
1692 {
1693         struct ar8xxx_priv *priv = phydev->priv;
1694         struct switch_port_link link;
1695         int ret;
1696
1697         if (phydev->addr != 0)
1698                 return genphy_read_status(phydev);
1699
1700         ar8216_read_port_link(priv, phydev->addr, &link);
1701         phydev->link = !!link.link;
1702         if (!phydev->link)
1703                 return 0;
1704
1705         switch (link.speed) {
1706         case SWITCH_PORT_SPEED_10:
1707                 phydev->speed = SPEED_10;
1708                 break;
1709         case SWITCH_PORT_SPEED_100:
1710                 phydev->speed = SPEED_100;
1711                 break;
1712         case SWITCH_PORT_SPEED_1000:
1713                 phydev->speed = SPEED_1000;
1714                 break;
1715         default:
1716                 phydev->speed = 0;
1717         }
1718         phydev->duplex = link.duplex ? DUPLEX_FULL : DUPLEX_HALF;
1719
1720         /* flush the address translation unit */
1721         mutex_lock(&priv->reg_mutex);
1722         ret = priv->chip->atu_flush(priv);
1723         mutex_unlock(&priv->reg_mutex);
1724
1725         phydev->state = PHY_RUNNING;
1726         netif_carrier_on(phydev->attached_dev);
1727         phydev->adjust_link(phydev->attached_dev);
1728
1729         return ret;
1730 }
1731
1732 static int
1733 ar8xxx_phy_config_aneg(struct phy_device *phydev)
1734 {
1735         if (phydev->addr == 0)
1736                 return 0;
1737
1738         return genphy_config_aneg(phydev);
1739 }
1740
1741 static const u32 ar8xxx_phy_ids[] = {
1742         0x004dd033,
1743         0x004dd034, /* AR8327 */
1744         0x004dd036, /* AR8337 */
1745         0x004dd041,
1746         0x004dd042,
1747         0x004dd043, /* AR8236 */
1748 };
1749
1750 static bool
1751 ar8xxx_phy_match(u32 phy_id)
1752 {
1753         int i;
1754
1755         for (i = 0; i < ARRAY_SIZE(ar8xxx_phy_ids); i++)
1756                 if (phy_id == ar8xxx_phy_ids[i])
1757                         return true;
1758
1759         return false;
1760 }
1761
1762 static bool
1763 ar8xxx_is_possible(struct mii_bus *bus)
1764 {
1765         unsigned i;
1766
1767         for (i = 0; i < 4; i++) {
1768                 u32 phy_id;
1769
1770                 phy_id = mdiobus_read(bus, i, MII_PHYSID1) << 16;
1771                 phy_id |= mdiobus_read(bus, i, MII_PHYSID2);
1772                 if (!ar8xxx_phy_match(phy_id)) {
1773                         pr_debug("ar8xxx: unknown PHY at %s:%02x id:%08x\n",
1774                                  dev_name(&bus->dev), i, phy_id);
1775                         return false;
1776                 }
1777         }
1778
1779         return true;
1780 }
1781
1782 static int
1783 ar8xxx_phy_probe(struct phy_device *phydev)
1784 {
1785         struct ar8xxx_priv *priv;
1786         struct switch_dev *swdev;
1787         int ret;
1788
1789         /* skip PHYs at unused adresses */
1790         if (phydev->addr != 0 && phydev->addr != 4)
1791                 return -ENODEV;
1792
1793         if (!ar8xxx_is_possible(phydev->bus))
1794                 return -ENODEV;
1795
1796         mutex_lock(&ar8xxx_dev_list_lock);
1797         list_for_each_entry(priv, &ar8xxx_dev_list, list)
1798                 if (priv->mii_bus == phydev->bus)
1799                         goto found;
1800
1801         priv = ar8xxx_create();
1802         if (priv == NULL) {
1803                 ret = -ENOMEM;
1804                 goto unlock;
1805         }
1806
1807         priv->mii_bus = phydev->bus;
1808
1809         ret = ar8xxx_probe_switch(priv);
1810         if (ret)
1811                 goto free_priv;
1812
1813         swdev = &priv->dev;
1814         swdev->alias = dev_name(&priv->mii_bus->dev);
1815         ret = register_switch(swdev, NULL);
1816         if (ret)
1817                 goto free_priv;
1818
1819         pr_info("%s: %s rev. %u switch registered on %s\n",
1820                 swdev->devname, swdev->name, priv->chip_rev,
1821                 dev_name(&priv->mii_bus->dev));
1822
1823 found:
1824         priv->use_count++;
1825
1826         if (phydev->addr == 0) {
1827                 if (ar8xxx_has_gige(priv)) {
1828                         phydev->supported = SUPPORTED_1000baseT_Full;
1829                         phydev->advertising = ADVERTISED_1000baseT_Full;
1830                 } else {
1831                         phydev->supported = SUPPORTED_100baseT_Full;
1832                         phydev->advertising = ADVERTISED_100baseT_Full;
1833                 }
1834
1835                 if (priv->chip->config_at_probe) {
1836                         priv->phy = phydev;
1837
1838                         ret = ar8xxx_start(priv);
1839                         if (ret)
1840                                 goto err_unregister_switch;
1841                 }
1842         } else {
1843                 if (ar8xxx_has_gige(priv)) {
1844                         phydev->supported |= SUPPORTED_1000baseT_Full;
1845                         phydev->advertising |= ADVERTISED_1000baseT_Full;
1846                 }
1847         }
1848
1849         phydev->priv = priv;
1850
1851         list_add(&priv->list, &ar8xxx_dev_list);
1852
1853         mutex_unlock(&ar8xxx_dev_list_lock);
1854
1855         return 0;
1856
1857 err_unregister_switch:
1858         if (--priv->use_count)
1859                 goto unlock;
1860
1861         unregister_switch(&priv->dev);
1862
1863 free_priv:
1864         ar8xxx_free(priv);
1865 unlock:
1866         mutex_unlock(&ar8xxx_dev_list_lock);
1867         return ret;
1868 }
1869
1870 static void
1871 ar8xxx_phy_detach(struct phy_device *phydev)
1872 {
1873         struct net_device *dev = phydev->attached_dev;
1874
1875         if (!dev)
1876                 return;
1877
1878         dev->phy_ptr = NULL;
1879         dev->priv_flags &= ~IFF_NO_IP_ALIGN;
1880         dev->eth_mangle_rx = NULL;
1881         dev->eth_mangle_tx = NULL;
1882 }
1883
1884 static void
1885 ar8xxx_phy_remove(struct phy_device *phydev)
1886 {
1887         struct ar8xxx_priv *priv = phydev->priv;
1888
1889         if (WARN_ON(!priv))
1890                 return;
1891
1892         phydev->priv = NULL;
1893         if (--priv->use_count > 0)
1894                 return;
1895
1896         mutex_lock(&ar8xxx_dev_list_lock);
1897         list_del(&priv->list);
1898         mutex_unlock(&ar8xxx_dev_list_lock);
1899
1900         unregister_switch(&priv->dev);
1901         ar8xxx_mib_stop(priv);
1902         ar8xxx_free(priv);
1903 }
1904
1905 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)
1906 static int
1907 ar8xxx_phy_soft_reset(struct phy_device *phydev)
1908 {
1909         /* we don't need an extra reset */
1910         return 0;
1911 }
1912 #endif
1913
1914 static struct phy_driver ar8xxx_phy_driver = {
1915         .phy_id         = 0x004d0000,
1916         .name           = "Atheros AR8216/AR8236/AR8316",
1917         .phy_id_mask    = 0xffff0000,
1918         .features       = PHY_BASIC_FEATURES,
1919         .probe          = ar8xxx_phy_probe,
1920         .remove         = ar8xxx_phy_remove,
1921         .detach         = ar8xxx_phy_detach,
1922         .config_init    = ar8xxx_phy_config_init,
1923         .config_aneg    = ar8xxx_phy_config_aneg,
1924         .read_status    = ar8xxx_phy_read_status,
1925 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)
1926         .soft_reset     = ar8xxx_phy_soft_reset,
1927 #endif
1928         .driver         = { .owner = THIS_MODULE },
1929 };
1930
1931 int __init
1932 ar8xxx_init(void)
1933 {
1934         return phy_driver_register(&ar8xxx_phy_driver);
1935 }
1936
1937 void __exit
1938 ar8xxx_exit(void)
1939 {
1940         phy_driver_unregister(&ar8xxx_phy_driver);
1941 }
1942
1943 module_init(ar8xxx_init);
1944 module_exit(ar8xxx_exit);
1945 MODULE_LICENSE("GPL");
1946