linux/drivers/net/ethernet/smsc/smsc911x.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/***************************************************************************
   3 *
   4 * Copyright (C) 2004-2008 SMSC
   5 * Copyright (C) 2005-2008 ARM
   6 *
   7 ***************************************************************************
   8 * Rewritten, heavily based on smsc911x simple driver by SMSC.
   9 * Partly uses io macros from smc91x.c by Nicolas Pitre
  10 *
  11 * Supported devices:
  12 *   LAN9115, LAN9116, LAN9117, LAN9118
  13 *   LAN9215, LAN9216, LAN9217, LAN9218
  14 *   LAN9210, LAN9211
  15 *   LAN9220, LAN9221
  16 *   LAN89218,LAN9250
  17 */
  18
  19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21#include <linux/crc32.h>
  22#include <linux/clk.h>
  23#include <linux/delay.h>
  24#include <linux/errno.h>
  25#include <linux/etherdevice.h>
  26#include <linux/ethtool.h>
  27#include <linux/init.h>
  28#include <linux/interrupt.h>
  29#include <linux/ioport.h>
  30#include <linux/kernel.h>
  31#include <linux/module.h>
  32#include <linux/netdevice.h>
  33#include <linux/platform_device.h>
  34#include <linux/regulator/consumer.h>
  35#include <linux/sched.h>
  36#include <linux/timer.h>
  37#include <linux/bug.h>
  38#include <linux/bitops.h>
  39#include <linux/irq.h>
  40#include <linux/io.h>
  41#include <linux/swab.h>
  42#include <linux/phy.h>
  43#include <linux/smsc911x.h>
  44#include <linux/device.h>
  45#include <linux/of.h>
  46#include <linux/of_device.h>
  47#include <linux/of_gpio.h>
  48#include <linux/of_net.h>
  49#include <linux/acpi.h>
  50#include <linux/pm_runtime.h>
  51#include <linux/property.h>
  52#include <linux/gpio/consumer.h>
  53
  54#include "smsc911x.h"
  55
  56#define SMSC_CHIPNAME           "smsc911x"
  57#define SMSC_MDIONAME           "smsc911x-mdio"
  58#define SMSC_DRV_VERSION        "2008-10-21"
  59
  60MODULE_LICENSE("GPL");
  61MODULE_VERSION(SMSC_DRV_VERSION);
  62MODULE_ALIAS("platform:smsc911x");
  63
  64#if USE_DEBUG > 0
  65static int debug = 16;
  66#else
  67static int debug = 3;
  68#endif
  69
  70module_param(debug, int, 0);
  71MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  72
  73struct smsc911x_data;
  74
  75struct smsc911x_ops {
  76        u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
  77        void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
  78        void (*rx_readfifo)(struct smsc911x_data *pdata,
  79                                unsigned int *buf, unsigned int wordcount);
  80        void (*tx_writefifo)(struct smsc911x_data *pdata,
  81                                unsigned int *buf, unsigned int wordcount);
  82};
  83
  84#define SMSC911X_NUM_SUPPLIES 2
  85
  86struct smsc911x_data {
  87        void __iomem *ioaddr;
  88
  89        unsigned int idrev;
  90
  91        /* used to decide which workarounds apply */
  92        unsigned int generation;
  93
  94        /* device configuration (copied from platform_data during probe) */
  95        struct smsc911x_platform_config config;
  96
  97        /* This needs to be acquired before calling any of below:
  98         * smsc911x_mac_read(), smsc911x_mac_write()
  99         */
 100        spinlock_t mac_lock;
 101
 102        /* spinlock to ensure register accesses are serialised */
 103        spinlock_t dev_lock;
 104
 105        struct mii_bus *mii_bus;
 106        unsigned int using_extphy;
 107        int last_duplex;
 108        int last_carrier;
 109
 110        u32 msg_enable;
 111        unsigned int gpio_setting;
 112        unsigned int gpio_orig_setting;
 113        struct net_device *dev;
 114        struct napi_struct napi;
 115
 116        unsigned int software_irq_signal;
 117
 118#ifdef USE_PHY_WORK_AROUND
 119#define MIN_PACKET_SIZE (64)
 120        char loopback_tx_pkt[MIN_PACKET_SIZE];
 121        char loopback_rx_pkt[MIN_PACKET_SIZE];
 122        unsigned int resetcount;
 123#endif
 124
 125        /* Members for Multicast filter workaround */
 126        unsigned int multicast_update_pending;
 127        unsigned int set_bits_mask;
 128        unsigned int clear_bits_mask;
 129        unsigned int hashhi;
 130        unsigned int hashlo;
 131
 132        /* register access functions */
 133        const struct smsc911x_ops *ops;
 134
 135        /* regulators */
 136        struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
 137
 138        /* Reset GPIO */
 139        struct gpio_desc *reset_gpiod;
 140
 141        /* clock */
 142        struct clk *clk;
 143};
 144
 145/* Easy access to information */
 146#define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
 147
 148static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
 149{
 150        if (pdata->config.flags & SMSC911X_USE_32BIT)
 151                return readl(pdata->ioaddr + reg);
 152
 153        if (pdata->config.flags & SMSC911X_USE_16BIT)
 154                return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
 155                        ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
 156
 157        BUG();
 158        return 0;
 159}
 160
 161static inline u32
 162__smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
 163{
 164        if (pdata->config.flags & SMSC911X_USE_32BIT)
 165                return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
 166
 167        if (pdata->config.flags & SMSC911X_USE_16BIT)
 168                return (readw(pdata->ioaddr +
 169                                __smsc_shift(pdata, reg)) & 0xFFFF) |
 170                        ((readw(pdata->ioaddr +
 171                        __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
 172
 173        BUG();
 174        return 0;
 175}
 176
 177static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
 178{
 179        u32 data;
 180        unsigned long flags;
 181
 182        spin_lock_irqsave(&pdata->dev_lock, flags);
 183        data = pdata->ops->reg_read(pdata, reg);
 184        spin_unlock_irqrestore(&pdata->dev_lock, flags);
 185
 186        return data;
 187}
 188
 189static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
 190                                        u32 val)
 191{
 192        if (pdata->config.flags & SMSC911X_USE_32BIT) {
 193                writel(val, pdata->ioaddr + reg);
 194                return;
 195        }
 196
 197        if (pdata->config.flags & SMSC911X_USE_16BIT) {
 198                writew(val & 0xFFFF, pdata->ioaddr + reg);
 199                writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
 200                return;
 201        }
 202
 203        BUG();
 204}
 205
 206static inline void
 207__smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
 208{
 209        if (pdata->config.flags & SMSC911X_USE_32BIT) {
 210                writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
 211                return;
 212        }
 213
 214        if (pdata->config.flags & SMSC911X_USE_16BIT) {
 215                writew(val & 0xFFFF,
 216                        pdata->ioaddr + __smsc_shift(pdata, reg));
 217                writew((val >> 16) & 0xFFFF,
 218                        pdata->ioaddr + __smsc_shift(pdata, reg + 2));
 219                return;
 220        }
 221
 222        BUG();
 223}
 224
 225static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
 226                                      u32 val)
 227{
 228        unsigned long flags;
 229
 230        spin_lock_irqsave(&pdata->dev_lock, flags);
 231        pdata->ops->reg_write(pdata, reg, val);
 232        spin_unlock_irqrestore(&pdata->dev_lock, flags);
 233}
 234
 235/* Writes a packet to the TX_DATA_FIFO */
 236static inline void
 237smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
 238                      unsigned int wordcount)
 239{
 240        unsigned long flags;
 241
 242        spin_lock_irqsave(&pdata->dev_lock, flags);
 243
 244        if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
 245                while (wordcount--)
 246                        __smsc911x_reg_write(pdata, TX_DATA_FIFO,
 247                                             swab32(*buf++));
 248                goto out;
 249        }
 250
 251        if (pdata->config.flags & SMSC911X_USE_32BIT) {
 252                iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
 253                goto out;
 254        }
 255
 256        if (pdata->config.flags & SMSC911X_USE_16BIT) {
 257                while (wordcount--)
 258                        __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
 259                goto out;
 260        }
 261
 262        BUG();
 263out:
 264        spin_unlock_irqrestore(&pdata->dev_lock, flags);
 265}
 266
 267/* Writes a packet to the TX_DATA_FIFO - shifted version */
 268static inline void
 269smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
 270                      unsigned int wordcount)
 271{
 272        unsigned long flags;
 273
 274        spin_lock_irqsave(&pdata->dev_lock, flags);
 275
 276        if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
 277                while (wordcount--)
 278                        __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
 279                                             swab32(*buf++));
 280                goto out;
 281        }
 282
 283        if (pdata->config.flags & SMSC911X_USE_32BIT) {
 284                iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
 285                                                TX_DATA_FIFO), buf, wordcount);
 286                goto out;
 287        }
 288
 289        if (pdata->config.flags & SMSC911X_USE_16BIT) {
 290                while (wordcount--)
 291                        __smsc911x_reg_write_shift(pdata,
 292                                                 TX_DATA_FIFO, *buf++);
 293                goto out;
 294        }
 295
 296        BUG();
 297out:
 298        spin_unlock_irqrestore(&pdata->dev_lock, flags);
 299}
 300
 301/* Reads a packet out of the RX_DATA_FIFO */
 302static inline void
 303smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
 304                     unsigned int wordcount)
 305{
 306        unsigned long flags;
 307
 308        spin_lock_irqsave(&pdata->dev_lock, flags);
 309
 310        if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
 311                while (wordcount--)
 312                        *buf++ = swab32(__smsc911x_reg_read(pdata,
 313                                                            RX_DATA_FIFO));
 314                goto out;
 315        }
 316
 317        if (pdata->config.flags & SMSC911X_USE_32BIT) {
 318                ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
 319                goto out;
 320        }
 321
 322        if (pdata->config.flags & SMSC911X_USE_16BIT) {
 323                while (wordcount--)
 324                        *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
 325                goto out;
 326        }
 327
 328        BUG();
 329out:
 330        spin_unlock_irqrestore(&pdata->dev_lock, flags);
 331}
 332
 333/* Reads a packet out of the RX_DATA_FIFO - shifted version */
 334static inline void
 335smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
 336                     unsigned int wordcount)
 337{
 338        unsigned long flags;
 339
 340        spin_lock_irqsave(&pdata->dev_lock, flags);
 341
 342        if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
 343                while (wordcount--)
 344                        *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
 345                                                            RX_DATA_FIFO));
 346                goto out;
 347        }
 348
 349        if (pdata->config.flags & SMSC911X_USE_32BIT) {
 350                ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
 351                                                RX_DATA_FIFO), buf, wordcount);
 352                goto out;
 353        }
 354
 355        if (pdata->config.flags & SMSC911X_USE_16BIT) {
 356                while (wordcount--)
 357                        *buf++ = __smsc911x_reg_read_shift(pdata,
 358                                                                RX_DATA_FIFO);
 359                goto out;
 360        }
 361
 362        BUG();
 363out:
 364        spin_unlock_irqrestore(&pdata->dev_lock, flags);
 365}
 366
 367/*
 368 * enable regulator and clock resources.
 369 */
 370static int smsc911x_enable_resources(struct platform_device *pdev)
 371{
 372        struct net_device *ndev = platform_get_drvdata(pdev);
 373        struct smsc911x_data *pdata = netdev_priv(ndev);
 374        int ret = 0;
 375
 376        ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
 377                        pdata->supplies);
 378        if (ret)
 379                netdev_err(ndev, "failed to enable regulators %d\n",
 380                                ret);
 381
 382        if (!IS_ERR(pdata->clk)) {
 383                ret = clk_prepare_enable(pdata->clk);
 384                if (ret < 0)
 385                        netdev_err(ndev, "failed to enable clock %d\n", ret);
 386        }
 387
 388        return ret;
 389}
 390
 391/*
 392 * disable resources, currently just regulators.
 393 */
 394static int smsc911x_disable_resources(struct platform_device *pdev)
 395{
 396        struct net_device *ndev = platform_get_drvdata(pdev);
 397        struct smsc911x_data *pdata = netdev_priv(ndev);
 398        int ret = 0;
 399
 400        ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
 401                        pdata->supplies);
 402
 403        if (!IS_ERR(pdata->clk))
 404                clk_disable_unprepare(pdata->clk);
 405
 406        return ret;
 407}
 408
 409/*
 410 * Request resources, currently just regulators.
 411 *
 412 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
 413 * these are not always-on we need to request regulators to be turned on
 414 * before we can try to access the device registers.
 415 */
 416static int smsc911x_request_resources(struct platform_device *pdev)
 417{
 418        struct net_device *ndev = platform_get_drvdata(pdev);
 419        struct smsc911x_data *pdata = netdev_priv(ndev);
 420        int ret = 0;
 421
 422        /* Request regulators */
 423        pdata->supplies[0].supply = "vdd33a";
 424        pdata->supplies[1].supply = "vddvario";
 425        ret = regulator_bulk_get(&pdev->dev,
 426                        ARRAY_SIZE(pdata->supplies),
 427                        pdata->supplies);
 428        if (ret) {
 429                /*
 430                 * Retry on deferrals, else just report the error
 431                 * and try to continue.
 432                 */
 433                if (ret == -EPROBE_DEFER)
 434                        return ret;
 435                netdev_err(ndev, "couldn't get regulators %d\n",
 436                                ret);
 437        }
 438
 439        /* Request optional RESET GPIO */
 440        pdata->reset_gpiod = devm_gpiod_get_optional(&pdev->dev,
 441                                                     "reset",
 442                                                     GPIOD_OUT_LOW);
 443
 444        /* Request clock */
 445        pdata->clk = clk_get(&pdev->dev, NULL);
 446        if (IS_ERR(pdata->clk))
 447                dev_dbg(&pdev->dev, "couldn't get clock %li\n",
 448                        PTR_ERR(pdata->clk));
 449
 450        return ret;
 451}
 452
 453/*
 454 * Free resources, currently just regulators.
 455 *
 456 */
 457static void smsc911x_free_resources(struct platform_device *pdev)
 458{
 459        struct net_device *ndev = platform_get_drvdata(pdev);
 460        struct smsc911x_data *pdata = netdev_priv(ndev);
 461
 462        /* Free regulators */
 463        regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
 464                        pdata->supplies);
 465
 466        /* Free clock */
 467        if (!IS_ERR(pdata->clk)) {
 468                clk_put(pdata->clk);
 469                pdata->clk = NULL;
 470        }
 471}
 472
 473/* waits for MAC not busy, with timeout.  Only called by smsc911x_mac_read
 474 * and smsc911x_mac_write, so assumes mac_lock is held */
 475static int smsc911x_mac_complete(struct smsc911x_data *pdata)
 476{
 477        int i;
 478        u32 val;
 479
 480        SMSC_ASSERT_MAC_LOCK(pdata);
 481
 482        for (i = 0; i < 40; i++) {
 483                val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
 484                if (!(val & MAC_CSR_CMD_CSR_BUSY_))
 485                        return 0;
 486        }
 487        SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
 488                  "MAC_CSR_CMD: 0x%08X", val);
 489        return -EIO;
 490}
 491
 492/* Fetches a MAC register value. Assumes mac_lock is acquired */
 493static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
 494{
 495        unsigned int temp;
 496
 497        SMSC_ASSERT_MAC_LOCK(pdata);
 498
 499        temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
 500        if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
 501                SMSC_WARN(pdata, hw, "MAC busy at entry");
 502                return 0xFFFFFFFF;
 503        }
 504
 505        /* Send the MAC cmd */
 506        smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
 507                MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
 508
 509        /* Workaround for hardware read-after-write restriction */
 510        temp = smsc911x_reg_read(pdata, BYTE_TEST);
 511
 512        /* Wait for the read to complete */
 513        if (likely(smsc911x_mac_complete(pdata) == 0))
 514                return smsc911x_reg_read(pdata, MAC_CSR_DATA);
 515
 516        SMSC_WARN(pdata, hw, "MAC busy after read");
 517        return 0xFFFFFFFF;
 518}
 519
 520/* Set a mac register, mac_lock must be acquired before calling */
 521static void smsc911x_mac_write(struct smsc911x_data *pdata,
 522                               unsigned int offset, u32 val)
 523{
 524        unsigned int temp;
 525
 526        SMSC_ASSERT_MAC_LOCK(pdata);
 527
 528        temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
 529        if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
 530                SMSC_WARN(pdata, hw,
 531                          "smsc911x_mac_write failed, MAC busy at entry");
 532                return;
 533        }
 534
 535        /* Send data to write */
 536        smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
 537
 538        /* Write the actual data */
 539        smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
 540                MAC_CSR_CMD_CSR_BUSY_));
 541
 542        /* Workaround for hardware read-after-write restriction */
 543        temp = smsc911x_reg_read(pdata, BYTE_TEST);
 544
 545        /* Wait for the write to complete */
 546        if (likely(smsc911x_mac_complete(pdata) == 0))
 547                return;
 548
 549        SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
 550}
 551
 552/* Get a phy register */
 553static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
 554{
 555        struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
 556        unsigned long flags;
 557        unsigned int addr;
 558        int i, reg;
 559
 560        spin_lock_irqsave(&pdata->mac_lock, flags);
 561
 562        /* Confirm MII not busy */
 563        if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
 564                SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
 565                reg = -EIO;
 566                goto out;
 567        }
 568
 569        /* Set the address, index & direction (read from PHY) */
 570        addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
 571        smsc911x_mac_write(pdata, MII_ACC, addr);
 572
 573        /* Wait for read to complete w/ timeout */
 574        for (i = 0; i < 100; i++)
 575                if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
 576                        reg = smsc911x_mac_read(pdata, MII_DATA);
 577                        goto out;
 578                }
 579
 580        SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
 581        reg = -EIO;
 582
 583out:
 584        spin_unlock_irqrestore(&pdata->mac_lock, flags);
 585        return reg;
 586}
 587
 588/* Set a phy register */
 589static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
 590                           u16 val)
 591{
 592        struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
 593        unsigned long flags;
 594        unsigned int addr;
 595        int i, reg;
 596
 597        spin_lock_irqsave(&pdata->mac_lock, flags);
 598
 599        /* Confirm MII not busy */
 600        if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
 601                SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
 602                reg = -EIO;
 603                goto out;
 604        }
 605
 606        /* Put the data to write in the MAC */
 607        smsc911x_mac_write(pdata, MII_DATA, val);
 608
 609        /* Set the address, index & direction (write to PHY) */
 610        addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
 611                MII_ACC_MII_WRITE_;
 612        smsc911x_mac_write(pdata, MII_ACC, addr);
 613
 614        /* Wait for write to complete w/ timeout */
 615        for (i = 0; i < 100; i++)
 616                if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
 617                        reg = 0;
 618                        goto out;
 619                }
 620
 621        SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
 622        reg = -EIO;
 623
 624out:
 625        spin_unlock_irqrestore(&pdata->mac_lock, flags);
 626        return reg;
 627}
 628
 629/* Switch to external phy. Assumes tx and rx are stopped. */
 630static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
 631{
 632        unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
 633
 634        /* Disable phy clocks to the MAC */
 635        hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
 636        hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
 637        smsc911x_reg_write(pdata, HW_CFG, hwcfg);
 638        udelay(10);     /* Enough time for clocks to stop */
 639
 640        /* Switch to external phy */
 641        hwcfg |= HW_CFG_EXT_PHY_EN_;
 642        smsc911x_reg_write(pdata, HW_CFG, hwcfg);
 643
 644        /* Enable phy clocks to the MAC */
 645        hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
 646        hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
 647        smsc911x_reg_write(pdata, HW_CFG, hwcfg);
 648        udelay(10);     /* Enough time for clocks to restart */
 649
 650        hwcfg |= HW_CFG_SMI_SEL_;
 651        smsc911x_reg_write(pdata, HW_CFG, hwcfg);
 652}
 653
 654/* Autodetects and enables external phy if present on supported chips.
 655 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
 656 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
 657static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
 658{
 659        unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
 660
 661        if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
 662                SMSC_TRACE(pdata, hw, "Forcing internal PHY");
 663                pdata->using_extphy = 0;
 664        } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
 665                SMSC_TRACE(pdata, hw, "Forcing external PHY");
 666                smsc911x_phy_enable_external(pdata);
 667                pdata->using_extphy = 1;
 668        } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
 669                SMSC_TRACE(pdata, hw,
 670                           "HW_CFG EXT_PHY_DET set, using external PHY");
 671                smsc911x_phy_enable_external(pdata);
 672                pdata->using_extphy = 1;
 673        } else {
 674                SMSC_TRACE(pdata, hw,
 675                           "HW_CFG EXT_PHY_DET clear, using internal PHY");
 676                pdata->using_extphy = 0;
 677        }
 678}
 679
 680/* Fetches a tx status out of the status fifo */
 681static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
 682{
 683        unsigned int result =
 684            smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
 685
 686        if (result != 0)
 687                result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
 688
 689        return result;
 690}
 691
 692/* Fetches the next rx status */
 693static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
 694{
 695        unsigned int result =
 696            smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
 697
 698        if (result != 0)
 699                result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
 700
 701        return result;
 702}
 703
 704#ifdef USE_PHY_WORK_AROUND
 705static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
 706{
 707        unsigned int tries;
 708        u32 wrsz;
 709        u32 rdsz;
 710        ulong bufp;
 711
 712        for (tries = 0; tries < 10; tries++) {
 713                unsigned int txcmd_a;
 714                unsigned int txcmd_b;
 715                unsigned int status;
 716                unsigned int pktlength;
 717                unsigned int i;
 718
 719                /* Zero-out rx packet memory */
 720                memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
 721
 722                /* Write tx packet to 118 */
 723                txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
 724                txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
 725                txcmd_a |= MIN_PACKET_SIZE;
 726
 727                txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
 728
 729                smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
 730                smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
 731
 732                bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
 733                wrsz = MIN_PACKET_SIZE + 3;
 734                wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
 735                wrsz >>= 2;
 736
 737                pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
 738
 739                /* Wait till transmit is done */
 740                i = 60;
 741                do {
 742                        udelay(5);
 743                        status = smsc911x_tx_get_txstatus(pdata);
 744                } while ((i--) && (!status));
 745
 746                if (!status) {
 747                        SMSC_WARN(pdata, hw,
 748                                  "Failed to transmit during loopback test");
 749                        continue;
 750                }
 751                if (status & TX_STS_ES_) {
 752                        SMSC_WARN(pdata, hw,
 753                                  "Transmit encountered errors during loopback test");
 754                        continue;
 755                }
 756
 757                /* Wait till receive is done */
 758                i = 60;
 759                do {
 760                        udelay(5);
 761                        status = smsc911x_rx_get_rxstatus(pdata);
 762                } while ((i--) && (!status));
 763
 764                if (!status) {
 765                        SMSC_WARN(pdata, hw,
 766                                  "Failed to receive during loopback test");
 767                        continue;
 768                }
 769                if (status & RX_STS_ES_) {
 770                        SMSC_WARN(pdata, hw,
 771                                  "Receive encountered errors during loopback test");
 772                        continue;
 773                }
 774
 775                pktlength = ((status & 0x3FFF0000UL) >> 16);
 776                bufp = (ulong)pdata->loopback_rx_pkt;
 777                rdsz = pktlength + 3;
 778                rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
 779                rdsz >>= 2;
 780
 781                pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
 782
 783                if (pktlength != (MIN_PACKET_SIZE + 4)) {
 784                        SMSC_WARN(pdata, hw, "Unexpected packet size "
 785                                  "during loop back test, size=%d, will retry",
 786                                  pktlength);
 787                } else {
 788                        unsigned int j;
 789                        int mismatch = 0;
 790                        for (j = 0; j < MIN_PACKET_SIZE; j++) {
 791                                if (pdata->loopback_tx_pkt[j]
 792                                    != pdata->loopback_rx_pkt[j]) {
 793                                        mismatch = 1;
 794                                        break;
 795                                }
 796                        }
 797                        if (!mismatch) {
 798                                SMSC_TRACE(pdata, hw, "Successfully verified "
 799                                           "loopback packet");
 800                                return 0;
 801                        } else {
 802                                SMSC_WARN(pdata, hw, "Data mismatch "
 803                                          "during loop back test, will retry");
 804                        }
 805                }
 806        }
 807
 808        return -EIO;
 809}
 810
 811static int smsc911x_phy_reset(struct smsc911x_data *pdata)
 812{
 813        unsigned int temp;
 814        unsigned int i = 100000;
 815
 816        temp = smsc911x_reg_read(pdata, PMT_CTRL);
 817        smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_);
 818        do {
 819                msleep(1);
 820                temp = smsc911x_reg_read(pdata, PMT_CTRL);
 821        } while ((i--) && (temp & PMT_CTRL_PHY_RST_));
 822
 823        if (unlikely(temp & PMT_CTRL_PHY_RST_)) {
 824                SMSC_WARN(pdata, hw, "PHY reset failed to complete");
 825                return -EIO;
 826        }
 827        /* Extra delay required because the phy may not be completed with
 828        * its reset when BMCR_RESET is cleared. Specs say 256 uS is
 829        * enough delay but using 1ms here to be safe */
 830        msleep(1);
 831
 832        return 0;
 833}
 834
 835static int smsc911x_phy_loopbacktest(struct net_device *dev)
 836{
 837        struct smsc911x_data *pdata = netdev_priv(dev);
 838        struct phy_device *phy_dev = dev->phydev;
 839        int result = -EIO;
 840        unsigned int i, val;
 841        unsigned long flags;
 842
 843        /* Initialise tx packet using broadcast destination address */
 844        eth_broadcast_addr(pdata->loopback_tx_pkt);
 845
 846        /* Use incrementing source address */
 847        for (i = 6; i < 12; i++)
 848                pdata->loopback_tx_pkt[i] = (char)i;
 849
 850        /* Set length type field */
 851        pdata->loopback_tx_pkt[12] = 0x00;
 852        pdata->loopback_tx_pkt[13] = 0x00;
 853
 854        for (i = 14; i < MIN_PACKET_SIZE; i++)
 855                pdata->loopback_tx_pkt[i] = (char)i;
 856
 857        val = smsc911x_reg_read(pdata, HW_CFG);
 858        val &= HW_CFG_TX_FIF_SZ_;
 859        val |= HW_CFG_SF_;
 860        smsc911x_reg_write(pdata, HW_CFG, val);
 861
 862        smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
 863        smsc911x_reg_write(pdata, RX_CFG,
 864                (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
 865
 866        for (i = 0; i < 10; i++) {
 867                /* Set PHY to 10/FD, no ANEG, and loopback mode */
 868                smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr,
 869                                   MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX);
 870
 871                /* Enable MAC tx/rx, FD */
 872                spin_lock_irqsave(&pdata->mac_lock, flags);
 873                smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
 874                                   | MAC_CR_TXEN_ | MAC_CR_RXEN_);
 875                spin_unlock_irqrestore(&pdata->mac_lock, flags);
 876
 877                if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
 878                        result = 0;
 879                        break;
 880                }
 881                pdata->resetcount++;
 882
 883                /* Disable MAC rx */
 884                spin_lock_irqsave(&pdata->mac_lock, flags);
 885                smsc911x_mac_write(pdata, MAC_CR, 0);
 886                spin_unlock_irqrestore(&pdata->mac_lock, flags);
 887
 888                smsc911x_phy_reset(pdata);
 889        }
 890
 891        /* Disable MAC */
 892        spin_lock_irqsave(&pdata->mac_lock, flags);
 893        smsc911x_mac_write(pdata, MAC_CR, 0);
 894        spin_unlock_irqrestore(&pdata->mac_lock, flags);
 895
 896        /* Cancel PHY loopback mode */
 897        smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, MII_BMCR, 0);
 898
 899        smsc911x_reg_write(pdata, TX_CFG, 0);
 900        smsc911x_reg_write(pdata, RX_CFG, 0);
 901
 902        return result;
 903}
 904#endif                          /* USE_PHY_WORK_AROUND */
 905
 906static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
 907{
 908        struct net_device *ndev = pdata->dev;
 909        struct phy_device *phy_dev = ndev->phydev;
 910        u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
 911        u32 flow;
 912        unsigned long flags;
 913
 914        if (phy_dev->duplex == DUPLEX_FULL) {
 915                u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
 916                u16 rmtadv = phy_read(phy_dev, MII_LPA);
 917                u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 918
 919                if (cap & FLOW_CTRL_RX)
 920                        flow = 0xFFFF0002;
 921                else
 922                        flow = 0;
 923
 924                if (cap & FLOW_CTRL_TX)
 925                        afc |= 0xF;
 926                else
 927                        afc &= ~0xF;
 928
 929                SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
 930                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 931                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 932        } else {
 933                SMSC_TRACE(pdata, hw, "half duplex");
 934                flow = 0;
 935                afc |= 0xF;
 936        }
 937
 938        spin_lock_irqsave(&pdata->mac_lock, flags);
 939        smsc911x_mac_write(pdata, FLOW, flow);
 940        spin_unlock_irqrestore(&pdata->mac_lock, flags);
 941
 942        smsc911x_reg_write(pdata, AFC_CFG, afc);
 943}
 944
 945/* Update link mode if anything has changed.  Called periodically when the
 946 * PHY is in polling mode, even if nothing has changed. */
 947static void smsc911x_phy_adjust_link(struct net_device *dev)
 948{
 949        struct smsc911x_data *pdata = netdev_priv(dev);
 950        struct phy_device *phy_dev = dev->phydev;
 951        unsigned long flags;
 952        int carrier;
 953
 954        if (phy_dev->duplex != pdata->last_duplex) {
 955                unsigned int mac_cr;
 956                SMSC_TRACE(pdata, hw, "duplex state has changed");
 957
 958                spin_lock_irqsave(&pdata->mac_lock, flags);
 959                mac_cr = smsc911x_mac_read(pdata, MAC_CR);
 960                if (phy_dev->duplex) {
 961                        SMSC_TRACE(pdata, hw,
 962                                   "configuring for full duplex mode");
 963                        mac_cr |= MAC_CR_FDPX_;
 964                } else {
 965                        SMSC_TRACE(pdata, hw,
 966                                   "configuring for half duplex mode");
 967                        mac_cr &= ~MAC_CR_FDPX_;
 968                }
 969                smsc911x_mac_write(pdata, MAC_CR, mac_cr);
 970                spin_unlock_irqrestore(&pdata->mac_lock, flags);
 971
 972                smsc911x_phy_update_flowcontrol(pdata);
 973                pdata->last_duplex = phy_dev->duplex;
 974        }
 975
 976        carrier = netif_carrier_ok(dev);
 977        if (carrier != pdata->last_carrier) {
 978                SMSC_TRACE(pdata, hw, "carrier state has changed");
 979                if (carrier) {
 980                        SMSC_TRACE(pdata, hw, "configuring for carrier OK");
 981                        if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
 982                            (!pdata->using_extphy)) {
 983                                /* Restore original GPIO configuration */
 984                                pdata->gpio_setting = pdata->gpio_orig_setting;
 985                                smsc911x_reg_write(pdata, GPIO_CFG,
 986                                        pdata->gpio_setting);
 987                        }
 988                } else {
 989                        SMSC_TRACE(pdata, hw, "configuring for no carrier");
 990                        /* Check global setting that LED1
 991                         * usage is 10/100 indicator */
 992                        pdata->gpio_setting = smsc911x_reg_read(pdata,
 993                                GPIO_CFG);
 994                        if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
 995                            (!pdata->using_extphy)) {
 996                                /* Force 10/100 LED off, after saving
 997                                 * original GPIO configuration */
 998                                pdata->gpio_orig_setting = pdata->gpio_setting;
 999
1000                                pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
1001                                pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
1002                                                        | GPIO_CFG_GPIODIR0_
1003                                                        | GPIO_CFG_GPIOD0_);
1004                                smsc911x_reg_write(pdata, GPIO_CFG,
1005                                        pdata->gpio_setting);
1006                        }
1007                }
1008                pdata->last_carrier = carrier;
1009        }
1010}
1011
1012static int smsc911x_mii_probe(struct net_device *dev)
1013{
1014        struct smsc911x_data *pdata = netdev_priv(dev);
1015        struct phy_device *phydev = NULL;
1016        int ret;
1017
1018        /* find the first phy */
1019        phydev = phy_find_first(pdata->mii_bus);
1020        if (!phydev) {
1021                netdev_err(dev, "no PHY found\n");
1022                return -ENODEV;
1023        }
1024
1025        SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1026                   phydev->mdio.addr, phydev->phy_id);
1027
1028        ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1029                                 pdata->config.phy_interface);
1030
1031        if (ret) {
1032                netdev_err(dev, "Could not attach to PHY\n");
1033                return ret;
1034        }
1035
1036        phy_attached_info(phydev);
1037
1038        phy_set_max_speed(phydev, SPEED_100);
1039
1040        /* mask with MAC supported features */
1041        phy_support_asym_pause(phydev);
1042
1043        pdata->last_duplex = -1;
1044        pdata->last_carrier = -1;
1045
1046#ifdef USE_PHY_WORK_AROUND
1047        if (smsc911x_phy_loopbacktest(dev) < 0) {
1048                SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1049                phy_disconnect(phydev);
1050                return -ENODEV;
1051        }
1052        SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1053#endif                          /* USE_PHY_WORK_AROUND */
1054
1055        SMSC_TRACE(pdata, hw, "phy initialised successfully");
1056        return 0;
1057}
1058
1059static int smsc911x_mii_init(struct platform_device *pdev,
1060                             struct net_device *dev)
1061{
1062        struct smsc911x_data *pdata = netdev_priv(dev);
1063        int err = -ENXIO;
1064
1065        pdata->mii_bus = mdiobus_alloc();
1066        if (!pdata->mii_bus) {
1067                err = -ENOMEM;
1068                goto err_out_1;
1069        }
1070
1071        pdata->mii_bus->name = SMSC_MDIONAME;
1072        snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1073                pdev->name, pdev->id);
1074        pdata->mii_bus->priv = pdata;
1075        pdata->mii_bus->read = smsc911x_mii_read;
1076        pdata->mii_bus->write = smsc911x_mii_write;
1077
1078        pdata->mii_bus->parent = &pdev->dev;
1079
1080        switch (pdata->idrev & 0xFFFF0000) {
1081        case 0x01170000:
1082        case 0x01150000:
1083        case 0x117A0000:
1084        case 0x115A0000:
1085                /* External PHY supported, try to autodetect */
1086                smsc911x_phy_initialise_external(pdata);
1087                break;
1088        default:
1089                SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1090                           "using internal PHY");
1091                pdata->using_extphy = 0;
1092                break;
1093        }
1094
1095        if (!pdata->using_extphy) {
1096                /* Mask all PHYs except ID 1 (internal) */
1097                pdata->mii_bus->phy_mask = ~(1 << 1);
1098        }
1099
1100        if (mdiobus_register(pdata->mii_bus)) {
1101                SMSC_WARN(pdata, probe, "Error registering mii bus");
1102                goto err_out_free_bus_2;
1103        }
1104
1105        return 0;
1106
1107err_out_free_bus_2:
1108        mdiobus_free(pdata->mii_bus);
1109err_out_1:
1110        return err;
1111}
1112
1113/* Gets the number of tx statuses in the fifo */
1114static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1115{
1116        return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1117                & TX_FIFO_INF_TSUSED_) >> 16;
1118}
1119
1120/* Reads tx statuses and increments counters where necessary */
1121static void smsc911x_tx_update_txcounters(struct net_device *dev)
1122{
1123        struct smsc911x_data *pdata = netdev_priv(dev);
1124        unsigned int tx_stat;
1125
1126        while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1127                if (unlikely(tx_stat & 0x80000000)) {
1128                        /* In this driver the packet tag is used as the packet
1129                         * length. Since a packet length can never reach the
1130                         * size of 0x8000, this bit is reserved. It is worth
1131                         * noting that the "reserved bit" in the warning above
1132                         * does not reference a hardware defined reserved bit
1133                         * but rather a driver defined one.
1134                         */
1135                        SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1136                } else {
1137                        if (unlikely(tx_stat & TX_STS_ES_)) {
1138                                dev->stats.tx_errors++;
1139                        } else {
1140                                dev->stats.tx_packets++;
1141                                dev->stats.tx_bytes += (tx_stat >> 16);
1142                        }
1143                        if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1144                                dev->stats.collisions += 16;
1145                                dev->stats.tx_aborted_errors += 1;
1146                        } else {
1147                                dev->stats.collisions +=
1148                                    ((tx_stat >> 3) & 0xF);
1149                        }
1150                        if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1151                                dev->stats.tx_carrier_errors += 1;
1152                        if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1153                                dev->stats.collisions++;
1154                                dev->stats.tx_aborted_errors++;
1155                        }
1156                }
1157        }
1158}
1159
1160/* Increments the Rx error counters */
1161static void
1162smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1163{
1164        int crc_err = 0;
1165
1166        if (unlikely(rxstat & RX_STS_ES_)) {
1167                dev->stats.rx_errors++;
1168                if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1169                        dev->stats.rx_crc_errors++;
1170                        crc_err = 1;
1171                }
1172        }
1173        if (likely(!crc_err)) {
1174                if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1175                             (rxstat & RX_STS_LENGTH_ERR_)))
1176                        dev->stats.rx_length_errors++;
1177                if (rxstat & RX_STS_MCAST_)
1178                        dev->stats.multicast++;
1179        }
1180}
1181
1182/* Quickly dumps bad packets */
1183static void
1184smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1185{
1186        if (likely(pktwords >= 4)) {
1187                unsigned int timeout = 500;
1188                unsigned int val;
1189                smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1190                do {
1191                        udelay(1);
1192                        val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1193                } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1194
1195                if (unlikely(timeout == 0))
1196                        SMSC_WARN(pdata, hw, "Timed out waiting for "
1197                                  "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1198        } else {
1199                while (pktwords--)
1200                        smsc911x_reg_read(pdata, RX_DATA_FIFO);
1201        }
1202}
1203
1204/* NAPI poll function */
1205static int smsc911x_poll(struct napi_struct *napi, int budget)
1206{
1207        struct smsc911x_data *pdata =
1208                container_of(napi, struct smsc911x_data, napi);
1209        struct net_device *dev = pdata->dev;
1210        int npackets = 0;
1211
1212        while (npackets < budget) {
1213                unsigned int pktlength;
1214                unsigned int pktwords;
1215                struct sk_buff *skb;
1216                unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1217
1218                if (!rxstat) {
1219                        unsigned int temp;
1220                        /* We processed all packets available.  Tell NAPI it can
1221                         * stop polling then re-enable rx interrupts */
1222                        smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1223                        napi_complete(napi);
1224                        temp = smsc911x_reg_read(pdata, INT_EN);
1225                        temp |= INT_EN_RSFL_EN_;
1226                        smsc911x_reg_write(pdata, INT_EN, temp);
1227                        break;
1228                }
1229
1230                /* Count packet for NAPI scheduling, even if it has an error.
1231                 * Error packets still require cycles to discard */
1232                npackets++;
1233
1234                pktlength = ((rxstat & 0x3FFF0000) >> 16);
1235                pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1236                smsc911x_rx_counterrors(dev, rxstat);
1237
1238                if (unlikely(rxstat & RX_STS_ES_)) {
1239                        SMSC_WARN(pdata, rx_err,
1240                                  "Discarding packet with error bit set");
1241                        /* Packet has an error, discard it and continue with
1242                         * the next */
1243                        smsc911x_rx_fastforward(pdata, pktwords);
1244                        dev->stats.rx_dropped++;
1245                        continue;
1246                }
1247
1248                skb = netdev_alloc_skb(dev, pktwords << 2);
1249                if (unlikely(!skb)) {
1250                        SMSC_WARN(pdata, rx_err,
1251                                  "Unable to allocate skb for rx packet");
1252                        /* Drop the packet and stop this polling iteration */
1253                        smsc911x_rx_fastforward(pdata, pktwords);
1254                        dev->stats.rx_dropped++;
1255                        break;
1256                }
1257
1258                pdata->ops->rx_readfifo(pdata,
1259                                 (unsigned int *)skb->data, pktwords);
1260
1261                /* Align IP on 16B boundary */
1262                skb_reserve(skb, NET_IP_ALIGN);
1263                skb_put(skb, pktlength - 4);
1264                skb->protocol = eth_type_trans(skb, dev);
1265                skb_checksum_none_assert(skb);
1266                netif_receive_skb(skb);
1267
1268                /* Update counters */
1269                dev->stats.rx_packets++;
1270                dev->stats.rx_bytes += (pktlength - 4);
1271        }
1272
1273        /* Return total received packets */
1274        return npackets;
1275}
1276
1277/* Returns hash bit number for given MAC address
1278 * Example:
1279 * 01 00 5E 00 00 01 -> returns bit number 31 */
1280static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1281{
1282        return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1283}
1284
1285static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1286{
1287        /* Performs the multicast & mac_cr update.  This is called when
1288         * safe on the current hardware, and with the mac_lock held */
1289        unsigned int mac_cr;
1290
1291        SMSC_ASSERT_MAC_LOCK(pdata);
1292
1293        mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1294        mac_cr |= pdata->set_bits_mask;
1295        mac_cr &= ~(pdata->clear_bits_mask);
1296        smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1297        smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1298        smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1299        SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1300                   mac_cr, pdata->hashhi, pdata->hashlo);
1301}
1302
1303static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1304{
1305        unsigned int mac_cr;
1306
1307        /* This function is only called for older LAN911x devices
1308         * (revA or revB), where MAC_CR, HASHH and HASHL should not
1309         * be modified during Rx - newer devices immediately update the
1310         * registers.
1311         *
1312         * This is called from interrupt context */
1313
1314        spin_lock(&pdata->mac_lock);
1315
1316        /* Check Rx has stopped */
1317        if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1318                SMSC_WARN(pdata, drv, "Rx not stopped");
1319
1320        /* Perform the update - safe to do now Rx has stopped */
1321        smsc911x_rx_multicast_update(pdata);
1322
1323        /* Re-enable Rx */
1324        mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1325        mac_cr |= MAC_CR_RXEN_;
1326        smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1327
1328        pdata->multicast_update_pending = 0;
1329
1330        spin_unlock(&pdata->mac_lock);
1331}
1332
1333static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1334{
1335        struct net_device *ndev = pdata->dev;
1336        struct phy_device *phy_dev = ndev->phydev;
1337        int rc = 0;
1338
1339        if (!phy_dev)
1340                return rc;
1341
1342        /* If the internal PHY is in General Power-Down mode, all, except the
1343         * management interface, is powered-down and stays in that condition as
1344         * long as Phy register bit 0.11 is HIGH.
1345         *
1346         * In that case, clear the bit 0.11, so the PHY powers up and we can
1347         * access to the phy registers.
1348         */
1349        rc = phy_read(phy_dev, MII_BMCR);
1350        if (rc < 0) {
1351                SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1352                return rc;
1353        }
1354
1355        /* If the PHY general power-down bit is not set is not necessary to
1356         * disable the general power down-mode.
1357         */
1358        if (rc & BMCR_PDOWN) {
1359                rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1360                if (rc < 0) {
1361                        SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1362                        return rc;
1363                }
1364
1365                usleep_range(1000, 1500);
1366        }
1367
1368        return 0;
1369}
1370
1371static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1372{
1373        struct net_device *ndev = pdata->dev;
1374        struct phy_device *phy_dev = ndev->phydev;
1375        int rc = 0;
1376
1377        if (!phy_dev)
1378                return rc;
1379
1380        rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1381
1382        if (rc < 0) {
1383                SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1384                return rc;
1385        }
1386
1387        /* Only disable if energy detect mode is already enabled */
1388        if (rc & MII_LAN83C185_EDPWRDOWN) {
1389                /* Disable energy detect mode for this SMSC Transceivers */
1390                rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1391                               rc & (~MII_LAN83C185_EDPWRDOWN));
1392
1393                if (rc < 0) {
1394                        SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1395                        return rc;
1396                }
1397                /* Allow PHY to wakeup */
1398                mdelay(2);
1399        }
1400
1401        return 0;
1402}
1403
1404static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1405{
1406        struct net_device *ndev = pdata->dev;
1407        struct phy_device *phy_dev = ndev->phydev;
1408        int rc = 0;
1409
1410        if (!phy_dev)
1411                return rc;
1412
1413        rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1414
1415        if (rc < 0) {
1416                SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1417                return rc;
1418        }
1419
1420        /* Only enable if energy detect mode is already disabled */
1421        if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1422                /* Enable energy detect mode for this SMSC Transceivers */
1423                rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1424                               rc | MII_LAN83C185_EDPWRDOWN);
1425
1426                if (rc < 0) {
1427                        SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1428                        return rc;
1429                }
1430        }
1431        return 0;
1432}
1433
1434static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1435{
1436        unsigned int timeout;
1437        unsigned int temp;
1438        int ret;
1439        unsigned int reset_offset = HW_CFG;
1440        unsigned int reset_mask = HW_CFG_SRST_;
1441
1442        /*
1443         * Make sure to power-up the PHY chip before doing a reset, otherwise
1444         * the reset fails.
1445         */
1446        ret = smsc911x_phy_general_power_up(pdata);
1447        if (ret) {
1448                SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1449                return ret;
1450        }
1451
1452        /*
1453         * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1454         * are initialized in a Energy Detect Power-Down mode that prevents
1455         * the MAC chip to be software reseted. So we have to wakeup the PHY
1456         * before.
1457         */
1458        if (pdata->generation == 4) {
1459                ret = smsc911x_phy_disable_energy_detect(pdata);
1460
1461                if (ret) {
1462                        SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1463                        return ret;
1464                }
1465        }
1466
1467        if ((pdata->idrev & 0xFFFF0000) == LAN9250) {
1468                /* special reset for  LAN9250 */
1469                reset_offset = RESET_CTL;
1470                reset_mask = RESET_CTL_DIGITAL_RST_;
1471        }
1472
1473        /* Reset the LAN911x */
1474        smsc911x_reg_write(pdata, reset_offset, reset_mask);
1475
1476        /* verify reset bit is cleared */
1477        timeout = 10;
1478        do {
1479                udelay(10);
1480                temp = smsc911x_reg_read(pdata, reset_offset);
1481        } while ((--timeout) && (temp & reset_mask));
1482
1483        if (unlikely(temp & reset_mask)) {
1484                SMSC_WARN(pdata, drv, "Failed to complete reset");
1485                return -EIO;
1486        }
1487
1488        if (pdata->generation == 4) {
1489                ret = smsc911x_phy_enable_energy_detect(pdata);
1490
1491                if (ret) {
1492                        SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1493                        return ret;
1494                }
1495        }
1496
1497        return 0;
1498}
1499
1500/* Sets the device MAC address to dev_addr, called with mac_lock held */
1501static void
1502smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1503{
1504        u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1505        u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1506            (dev_addr[1] << 8) | dev_addr[0];
1507
1508        SMSC_ASSERT_MAC_LOCK(pdata);
1509
1510        smsc911x_mac_write(pdata, ADDRH, mac_high16);
1511        smsc911x_mac_write(pdata, ADDRL, mac_low32);
1512}
1513
1514static void smsc911x_disable_irq_chip(struct net_device *dev)
1515{
1516        struct smsc911x_data *pdata = netdev_priv(dev);
1517
1518        smsc911x_reg_write(pdata, INT_EN, 0);
1519        smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1520}
1521
1522static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1523{
1524        struct net_device *dev = dev_id;
1525        struct smsc911x_data *pdata = netdev_priv(dev);
1526        u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1527        u32 inten = smsc911x_reg_read(pdata, INT_EN);
1528        int serviced = IRQ_NONE;
1529        u32 temp;
1530
1531        if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1532                temp = smsc911x_reg_read(pdata, INT_EN);
1533                temp &= (~INT_EN_SW_INT_EN_);
1534                smsc911x_reg_write(pdata, INT_EN, temp);
1535                smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1536                pdata->software_irq_signal = 1;
1537                smp_wmb();
1538                serviced = IRQ_HANDLED;
1539        }
1540
1541        if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1542                /* Called when there is a multicast update scheduled and
1543                 * it is now safe to complete the update */
1544                SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1545                smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1546                if (pdata->multicast_update_pending)
1547                        smsc911x_rx_multicast_update_workaround(pdata);
1548                serviced = IRQ_HANDLED;
1549        }
1550
1551        if (intsts & inten & INT_STS_TDFA_) {
1552                temp = smsc911x_reg_read(pdata, FIFO_INT);
1553                temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1554                smsc911x_reg_write(pdata, FIFO_INT, temp);
1555                smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1556                netif_wake_queue(dev);
1557                serviced = IRQ_HANDLED;
1558        }
1559
1560        if (unlikely(intsts & inten & INT_STS_RXE_)) {
1561                SMSC_TRACE(pdata, intr, "RX Error interrupt");
1562                smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1563                serviced = IRQ_HANDLED;
1564        }
1565
1566        if (likely(intsts & inten & INT_STS_RSFL_)) {
1567                if (likely(napi_schedule_prep(&pdata->napi))) {
1568                        /* Disable Rx interrupts */
1569                        temp = smsc911x_reg_read(pdata, INT_EN);
1570                        temp &= (~INT_EN_RSFL_EN_);
1571                        smsc911x_reg_write(pdata, INT_EN, temp);
1572                        /* Schedule a NAPI poll */
1573                        __napi_schedule(&pdata->napi);
1574                } else {
1575                        SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1576                }
1577                serviced = IRQ_HANDLED;
1578        }
1579
1580        return serviced;
1581}
1582
1583static int smsc911x_open(struct net_device *dev)
1584{
1585        struct smsc911x_data *pdata = netdev_priv(dev);
1586        unsigned int timeout;
1587        unsigned int temp;
1588        unsigned int intcfg;
1589        int retval;
1590        int irq_flags;
1591
1592        /* find and start the given phy */
1593        if (!dev->phydev) {
1594                retval = smsc911x_mii_probe(dev);
1595                if (retval < 0) {
1596                        SMSC_WARN(pdata, probe, "Error starting phy");
1597                        goto out;
1598                }
1599        }
1600
1601        /* Reset the LAN911x */
1602        retval = smsc911x_soft_reset(pdata);
1603        if (retval) {
1604                SMSC_WARN(pdata, hw, "soft reset failed");
1605                goto mii_free_out;
1606        }
1607
1608        smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1609        smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1610
1611        /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1612        spin_lock_irq(&pdata->mac_lock);
1613        smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1614        spin_unlock_irq(&pdata->mac_lock);
1615
1616        /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1617        timeout = 50;
1618        while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1619               --timeout) {
1620                udelay(10);
1621        }
1622
1623        if (unlikely(timeout == 0))
1624                SMSC_WARN(pdata, ifup,
1625                          "Timed out waiting for EEPROM busy bit to clear");
1626
1627        smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1628
1629        /* The soft reset above cleared the device's MAC address,
1630         * restore it from local copy (set in probe) */
1631        spin_lock_irq(&pdata->mac_lock);
1632        smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1633        spin_unlock_irq(&pdata->mac_lock);
1634
1635        /* Initialise irqs, but leave all sources disabled */
1636        smsc911x_disable_irq_chip(dev);
1637
1638        /* Set interrupt deassertion to 100uS */
1639        intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1640
1641        if (pdata->config.irq_polarity) {
1642                SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1643                intcfg |= INT_CFG_IRQ_POL_;
1644        } else {
1645                SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1646        }
1647
1648        if (pdata->config.irq_type) {
1649                SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1650                intcfg |= INT_CFG_IRQ_TYPE_;
1651        } else {
1652                SMSC_TRACE(pdata, ifup, "irq type: open drain");
1653        }
1654
1655        smsc911x_reg_write(pdata, INT_CFG, intcfg);
1656
1657        SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1658        pdata->software_irq_signal = 0;
1659        smp_wmb();
1660
1661        irq_flags = irq_get_trigger_type(dev->irq);
1662        retval = request_irq(dev->irq, smsc911x_irqhandler,
1663                             irq_flags | IRQF_SHARED, dev->name, dev);
1664        if (retval) {
1665                SMSC_WARN(pdata, probe,
1666                          "Unable to claim requested irq: %d", dev->irq);
1667                goto mii_free_out;
1668        }
1669
1670        temp = smsc911x_reg_read(pdata, INT_EN);
1671        temp |= INT_EN_SW_INT_EN_;
1672        smsc911x_reg_write(pdata, INT_EN, temp);
1673
1674        timeout = 1000;
1675        while (timeout--) {
1676                if (pdata->software_irq_signal)
1677                        break;
1678                msleep(1);
1679        }
1680
1681        if (!pdata->software_irq_signal) {
1682                netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1683                            dev->irq);
1684                retval = -ENODEV;
1685                goto irq_stop_out;
1686        }
1687        SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1688                   dev->irq);
1689
1690        netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1691                    (unsigned long)pdata->ioaddr, dev->irq);
1692
1693        /* Reset the last known duplex and carrier */
1694        pdata->last_duplex = -1;
1695        pdata->last_carrier = -1;
1696
1697        /* Bring the PHY up */
1698        phy_start(dev->phydev);
1699
1700        temp = smsc911x_reg_read(pdata, HW_CFG);
1701        /* Preserve TX FIFO size and external PHY configuration */
1702        temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1703        temp |= HW_CFG_SF_;
1704        smsc911x_reg_write(pdata, HW_CFG, temp);
1705
1706        temp = smsc911x_reg_read(pdata, FIFO_INT);
1707        temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1708        temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1709        smsc911x_reg_write(pdata, FIFO_INT, temp);
1710
1711        /* set RX Data offset to 2 bytes for alignment */
1712        smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1713
1714        /* enable NAPI polling before enabling RX interrupts */
1715        napi_enable(&pdata->napi);
1716
1717        temp = smsc911x_reg_read(pdata, INT_EN);
1718        temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1719        smsc911x_reg_write(pdata, INT_EN, temp);
1720
1721        spin_lock_irq(&pdata->mac_lock);
1722        temp = smsc911x_mac_read(pdata, MAC_CR);
1723        temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1724        smsc911x_mac_write(pdata, MAC_CR, temp);
1725        spin_unlock_irq(&pdata->mac_lock);
1726
1727        smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1728
1729        netif_start_queue(dev);
1730        return 0;
1731
1732irq_stop_out:
1733        free_irq(dev->irq, dev);
1734mii_free_out:
1735        phy_disconnect(dev->phydev);
1736        dev->phydev = NULL;
1737out:
1738        return retval;
1739}
1740
1741/* Entry point for stopping the interface */
1742static int smsc911x_stop(struct net_device *dev)
1743{
1744        struct smsc911x_data *pdata = netdev_priv(dev);
1745        unsigned int temp;
1746
1747        /* Disable all device interrupts */
1748        temp = smsc911x_reg_read(pdata, INT_CFG);
1749        temp &= ~INT_CFG_IRQ_EN_;
1750        smsc911x_reg_write(pdata, INT_CFG, temp);
1751
1752        /* Stop Tx and Rx polling */
1753        netif_stop_queue(dev);
1754        napi_disable(&pdata->napi);
1755
1756        /* At this point all Rx and Tx activity is stopped */
1757        dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1758        smsc911x_tx_update_txcounters(dev);
1759
1760        free_irq(dev->irq, dev);
1761
1762        /* Bring the PHY down */
1763        if (dev->phydev) {
1764                phy_stop(dev->phydev);
1765                phy_disconnect(dev->phydev);
1766                dev->phydev = NULL;
1767        }
1768        netif_carrier_off(dev);
1769
1770        SMSC_TRACE(pdata, ifdown, "Interface stopped");
1771        return 0;
1772}
1773
1774/* Entry point for transmitting a packet */
1775static netdev_tx_t
1776smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1777{
1778        struct smsc911x_data *pdata = netdev_priv(dev);
1779        unsigned int freespace;
1780        unsigned int tx_cmd_a;
1781        unsigned int tx_cmd_b;
1782        unsigned int temp;
1783        u32 wrsz;
1784        ulong bufp;
1785
1786        freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1787
1788        if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1789                SMSC_WARN(pdata, tx_err,
1790                          "Tx data fifo low, space available: %d", freespace);
1791
1792        /* Word alignment adjustment */
1793        tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1794        tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1795        tx_cmd_a |= (unsigned int)skb->len;
1796
1797        tx_cmd_b = ((unsigned int)skb->len) << 16;
1798        tx_cmd_b |= (unsigned int)skb->len;
1799
1800        smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1801        smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1802
1803        bufp = (ulong)skb->data & (~0x3);
1804        wrsz = (u32)skb->len + 3;
1805        wrsz += (u32)((ulong)skb->data & 0x3);
1806        wrsz >>= 2;
1807
1808        pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1809        freespace -= (skb->len + 32);
1810        skb_tx_timestamp(skb);
1811        dev_consume_skb_any(skb);
1812
1813        if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1814                smsc911x_tx_update_txcounters(dev);
1815
1816        if (freespace < TX_FIFO_LOW_THRESHOLD) {
1817                netif_stop_queue(dev);
1818                temp = smsc911x_reg_read(pdata, FIFO_INT);
1819                temp &= 0x00FFFFFF;
1820                temp |= 0x32000000;
1821                smsc911x_reg_write(pdata, FIFO_INT, temp);
1822        }
1823
1824        return NETDEV_TX_OK;
1825}
1826
1827/* Entry point for getting status counters */
1828static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1829{
1830        struct smsc911x_data *pdata = netdev_priv(dev);
1831        smsc911x_tx_update_txcounters(dev);
1832        dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1833        return &dev->stats;
1834}
1835
1836/* Entry point for setting addressing modes */
1837static void smsc911x_set_multicast_list(struct net_device *dev)
1838{
1839        struct smsc911x_data *pdata = netdev_priv(dev);
1840        unsigned long flags;
1841
1842        if (dev->flags & IFF_PROMISC) {
1843                /* Enabling promiscuous mode */
1844                pdata->set_bits_mask = MAC_CR_PRMS_;
1845                pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1846                pdata->hashhi = 0;
1847                pdata->hashlo = 0;
1848        } else if (dev->flags & IFF_ALLMULTI) {
1849                /* Enabling all multicast mode */
1850                pdata->set_bits_mask = MAC_CR_MCPAS_;
1851                pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1852                pdata->hashhi = 0;
1853                pdata->hashlo = 0;
1854        } else if (!netdev_mc_empty(dev)) {
1855                /* Enabling specific multicast addresses */
1856                unsigned int hash_high = 0;
1857                unsigned int hash_low = 0;
1858                struct netdev_hw_addr *ha;
1859
1860                pdata->set_bits_mask = MAC_CR_HPFILT_;
1861                pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1862
1863                netdev_for_each_mc_addr(ha, dev) {
1864                        unsigned int bitnum = smsc911x_hash(ha->addr);
1865                        unsigned int mask = 0x01 << (bitnum & 0x1F);
1866
1867                        if (bitnum & 0x20)
1868                                hash_high |= mask;
1869                        else
1870                                hash_low |= mask;
1871                }
1872
1873                pdata->hashhi = hash_high;
1874                pdata->hashlo = hash_low;
1875        } else {
1876                /* Enabling local MAC address only */
1877                pdata->set_bits_mask = 0;
1878                pdata->clear_bits_mask =
1879                    (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1880                pdata->hashhi = 0;
1881                pdata->hashlo = 0;
1882        }
1883
1884        spin_lock_irqsave(&pdata->mac_lock, flags);
1885
1886        if (pdata->generation <= 1) {
1887                /* Older hardware revision - cannot change these flags while
1888                 * receiving data */
1889                if (!pdata->multicast_update_pending) {
1890                        unsigned int temp;
1891                        SMSC_TRACE(pdata, hw, "scheduling mcast update");
1892                        pdata->multicast_update_pending = 1;
1893
1894                        /* Request the hardware to stop, then perform the
1895                         * update when we get an RX_STOP interrupt */
1896                        temp = smsc911x_mac_read(pdata, MAC_CR);
1897                        temp &= ~(MAC_CR_RXEN_);
1898                        smsc911x_mac_write(pdata, MAC_CR, temp);
1899                } else {
1900                        /* There is another update pending, this should now
1901                         * use the newer values */
1902                }
1903        } else {
1904                /* Newer hardware revision - can write immediately */
1905                smsc911x_rx_multicast_update(pdata);
1906        }
1907
1908        spin_unlock_irqrestore(&pdata->mac_lock, flags);
1909}
1910
1911#ifdef CONFIG_NET_POLL_CONTROLLER
1912static void smsc911x_poll_controller(struct net_device *dev)
1913{
1914        disable_irq(dev->irq);
1915        smsc911x_irqhandler(0, dev);
1916        enable_irq(dev->irq);
1917}
1918#endif                          /* CONFIG_NET_POLL_CONTROLLER */
1919
1920static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1921{
1922        struct smsc911x_data *pdata = netdev_priv(dev);
1923        struct sockaddr *addr = p;
1924
1925        /* On older hardware revisions we cannot change the mac address
1926         * registers while receiving data.  Newer devices can safely change
1927         * this at any time. */
1928        if (pdata->generation <= 1 && netif_running(dev))
1929                return -EBUSY;
1930
1931        if (!is_valid_ether_addr(addr->sa_data))
1932                return -EADDRNOTAVAIL;
1933
1934        memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1935
1936        spin_lock_irq(&pdata->mac_lock);
1937        smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1938        spin_unlock_irq(&pdata->mac_lock);
1939
1940        netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1941
1942        return 0;
1943}
1944
1945static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1946                                        struct ethtool_drvinfo *info)
1947{
1948        strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1949        strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1950        strlcpy(info->bus_info, dev_name(dev->dev.parent),
1951                sizeof(info->bus_info));
1952}
1953
1954static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1955{
1956        struct smsc911x_data *pdata = netdev_priv(dev);
1957        return pdata->msg_enable;
1958}
1959
1960static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1961{
1962        struct smsc911x_data *pdata = netdev_priv(dev);
1963        pdata->msg_enable = level;
1964}
1965
1966static int smsc911x_ethtool_getregslen(struct net_device *dev)
1967{
1968        return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1969            sizeof(u32);
1970}
1971
1972static void
1973smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1974                         void *buf)
1975{
1976        struct smsc911x_data *pdata = netdev_priv(dev);
1977        struct phy_device *phy_dev = dev->phydev;
1978        unsigned long flags;
1979        unsigned int i;
1980        unsigned int j = 0;
1981        u32 *data = buf;
1982
1983        regs->version = pdata->idrev;
1984        for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1985                data[j++] = smsc911x_reg_read(pdata, i);
1986
1987        for (i = MAC_CR; i <= WUCSR; i++) {
1988                spin_lock_irqsave(&pdata->mac_lock, flags);
1989                data[j++] = smsc911x_mac_read(pdata, i);
1990                spin_unlock_irqrestore(&pdata->mac_lock, flags);
1991        }
1992
1993        for (i = 0; i <= 31; i++)
1994                data[j++] = smsc911x_mii_read(phy_dev->mdio.bus,
1995                                              phy_dev->mdio.addr, i);
1996}
1997
1998static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
1999{
2000        unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2001        temp &= ~GPIO_CFG_EEPR_EN_;
2002        smsc911x_reg_write(pdata, GPIO_CFG, temp);
2003        msleep(1);
2004}
2005
2006static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2007{
2008        int timeout = 100;
2009        u32 e2cmd;
2010
2011        SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2012        if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2013                SMSC_WARN(pdata, drv, "Busy at start");
2014                return -EBUSY;
2015        }
2016
2017        e2cmd = op | E2P_CMD_EPC_BUSY_;
2018        smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2019
2020        do {
2021                msleep(1);
2022                e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2023        } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2024
2025        if (!timeout) {
2026                SMSC_TRACE(pdata, drv, "TIMED OUT");
2027                return -EAGAIN;
2028        }
2029
2030        if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2031                SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2032                return -EINVAL;
2033        }
2034
2035        return 0;
2036}
2037
2038static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2039                                         u8 address, u8 *data)
2040{
2041        u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2042        int ret;
2043
2044        SMSC_TRACE(pdata, drv, "address 0x%x", address);
2045        ret = smsc911x_eeprom_send_cmd(pdata, op);
2046
2047        if (!ret)
2048                data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2049
2050        return ret;
2051}
2052
2053static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2054                                          u8 address, u8 data)
2055{
2056        u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2057        int ret;
2058
2059        SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2060        ret = smsc911x_eeprom_send_cmd(pdata, op);
2061
2062        if (!ret) {
2063                op = E2P_CMD_EPC_CMD_WRITE_ | address;
2064                smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2065
2066                /* Workaround for hardware read-after-write restriction */
2067                smsc911x_reg_read(pdata, BYTE_TEST);
2068
2069                ret = smsc911x_eeprom_send_cmd(pdata, op);
2070        }
2071
2072        return ret;
2073}
2074
2075static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2076{
2077        return SMSC911X_EEPROM_SIZE;
2078}
2079
2080static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2081                                       struct ethtool_eeprom *eeprom, u8 *data)
2082{
2083        struct smsc911x_data *pdata = netdev_priv(dev);
2084        u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2085        int len;
2086        int i;
2087
2088        smsc911x_eeprom_enable_access(pdata);
2089
2090        len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2091        for (i = 0; i < len; i++) {
2092                int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2093                if (ret < 0) {
2094                        eeprom->len = 0;
2095                        return ret;
2096                }
2097        }
2098
2099        memcpy(data, &eeprom_data[eeprom->offset], len);
2100        eeprom->len = len;
2101        return 0;
2102}
2103
2104static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2105                                       struct ethtool_eeprom *eeprom, u8 *data)
2106{
2107        int ret;
2108        struct smsc911x_data *pdata = netdev_priv(dev);
2109
2110        smsc911x_eeprom_enable_access(pdata);
2111        smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2112        ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2113        smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2114
2115        /* Single byte write, according to man page */
2116        eeprom->len = 1;
2117
2118        return ret;
2119}
2120
2121static const struct ethtool_ops smsc911x_ethtool_ops = {
2122        .get_link = ethtool_op_get_link,
2123        .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2124        .nway_reset = phy_ethtool_nway_reset,
2125        .get_msglevel = smsc911x_ethtool_getmsglevel,
2126        .set_msglevel = smsc911x_ethtool_setmsglevel,
2127        .get_regs_len = smsc911x_ethtool_getregslen,
2128        .get_regs = smsc911x_ethtool_getregs,
2129        .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2130        .get_eeprom = smsc911x_ethtool_get_eeprom,
2131        .set_eeprom = smsc911x_ethtool_set_eeprom,
2132        .get_ts_info = ethtool_op_get_ts_info,
2133        .get_link_ksettings = phy_ethtool_get_link_ksettings,
2134        .set_link_ksettings = phy_ethtool_set_link_ksettings,
2135};
2136
2137static const struct net_device_ops smsc911x_netdev_ops = {
2138        .ndo_open               = smsc911x_open,
2139        .ndo_stop               = smsc911x_stop,
2140        .ndo_start_xmit         = smsc911x_hard_start_xmit,
2141        .ndo_get_stats          = smsc911x_get_stats,
2142        .ndo_set_rx_mode        = smsc911x_set_multicast_list,
2143        .ndo_do_ioctl           = phy_do_ioctl_running,
2144        .ndo_validate_addr      = eth_validate_addr,
2145        .ndo_set_mac_address    = smsc911x_set_mac_address,
2146#ifdef CONFIG_NET_POLL_CONTROLLER
2147        .ndo_poll_controller    = smsc911x_poll_controller,
2148#endif
2149};
2150
2151/* copies the current mac address from hardware to dev->dev_addr */
2152static void smsc911x_read_mac_address(struct net_device *dev)
2153{
2154        struct smsc911x_data *pdata = netdev_priv(dev);
2155        u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2156        u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2157
2158        dev->dev_addr[0] = (u8)(mac_low32);
2159        dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2160        dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2161        dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2162        dev->dev_addr[4] = (u8)(mac_high16);
2163        dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2164}
2165
2166/* Initializing private device structures, only called from probe */
2167static int smsc911x_init(struct net_device *dev)
2168{
2169        struct smsc911x_data *pdata = netdev_priv(dev);
2170        unsigned int byte_test, mask;
2171        unsigned int to = 100;
2172
2173        SMSC_TRACE(pdata, probe, "Driver Parameters:");
2174        SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2175                   (unsigned long)pdata->ioaddr);
2176        SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2177        SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2178
2179        spin_lock_init(&pdata->dev_lock);
2180        spin_lock_init(&pdata->mac_lock);
2181
2182        if (pdata->ioaddr == NULL) {
2183                SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2184                return -ENODEV;
2185        }
2186
2187        /*
2188         * poll the READY bit in PMT_CTRL. Any other access to the device is
2189         * forbidden while this bit isn't set. Try for 100ms
2190         *
2191         * Note that this test is done before the WORD_SWAP register is
2192         * programmed. So in some configurations the READY bit is at 16 before
2193         * WORD_SWAP is written to. This issue is worked around by waiting
2194         * until either bit 0 or bit 16 gets set in PMT_CTRL.
2195         *
2196         * SMSC has confirmed that checking bit 16 (marked as reserved in
2197         * the datasheet) is fine since these bits "will either never be set
2198         * or can only go high after READY does (so also indicate the device
2199         * is ready)".
2200         */
2201
2202        mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2203        while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2204                udelay(1000);
2205
2206        if (to == 0) {
2207                netdev_err(dev, "Device not READY in 100ms aborting\n");
2208                return -ENODEV;
2209        }
2210
2211        /* Check byte ordering */
2212        byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2213        SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2214        if (byte_test == 0x43218765) {
2215                SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2216                           "applying WORD_SWAP");
2217                smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2218
2219                /* 1 dummy read of BYTE_TEST is needed after a write to
2220                 * WORD_SWAP before its contents are valid */
2221                byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2222
2223                byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2224        }
2225
2226        if (byte_test != 0x87654321) {
2227                SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2228                if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2229                        SMSC_WARN(pdata, probe,
2230                                  "top 16 bits equal to bottom 16 bits");
2231                        SMSC_TRACE(pdata, probe,
2232                                   "This may mean the chip is set "
2233                                   "for 32 bit while the bus is reading 16 bit");
2234                }
2235                return -ENODEV;
2236        }
2237
2238        /* Default generation to zero (all workarounds apply) */
2239        pdata->generation = 0;
2240
2241        pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2242        switch (pdata->idrev & 0xFFFF0000) {
2243        case LAN9118:
2244        case LAN9117:
2245        case LAN9116:
2246        case LAN9115:
2247        case LAN89218:
2248                /* LAN911[5678] family */
2249                pdata->generation = pdata->idrev & 0x0000FFFF;
2250                break;
2251
2252        case LAN9218:
2253        case LAN9217:
2254        case LAN9216:
2255        case LAN9215:
2256                /* LAN921[5678] family */
2257                pdata->generation = 3;
2258                break;
2259
2260        case LAN9210:
2261        case LAN9211:
2262        case LAN9220:
2263        case LAN9221:
2264        case LAN9250:
2265                /* LAN9210/LAN9211/LAN9220/LAN9221/LAN9250 */
2266                pdata->generation = 4;
2267                break;
2268
2269        default:
2270                SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2271                          pdata->idrev);
2272                return -ENODEV;
2273        }
2274
2275        SMSC_TRACE(pdata, probe,
2276                   "LAN911x identified, idrev: 0x%08X, generation: %d",
2277                   pdata->idrev, pdata->generation);
2278
2279        if (pdata->generation == 0)
2280                SMSC_WARN(pdata, probe,
2281                          "This driver is not intended for this chip revision");
2282
2283        /* workaround for platforms without an eeprom, where the mac address
2284         * is stored elsewhere and set by the bootloader.  This saves the
2285         * mac address before resetting the device */
2286        if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2287                spin_lock_irq(&pdata->mac_lock);
2288                smsc911x_read_mac_address(dev);
2289                spin_unlock_irq(&pdata->mac_lock);
2290        }
2291
2292        /* Reset the LAN911x */
2293        if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
2294                return -ENODEV;
2295
2296        dev->flags |= IFF_MULTICAST;
2297        netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2298        dev->netdev_ops = &smsc911x_netdev_ops;
2299        dev->ethtool_ops = &smsc911x_ethtool_ops;
2300
2301        return 0;
2302}
2303
2304static int smsc911x_drv_remove(struct platform_device *pdev)
2305{
2306        struct net_device *dev;
2307        struct smsc911x_data *pdata;
2308        struct resource *res;
2309
2310        dev = platform_get_drvdata(pdev);
2311        BUG_ON(!dev);
2312        pdata = netdev_priv(dev);
2313        BUG_ON(!pdata);
2314        BUG_ON(!pdata->ioaddr);
2315
2316        SMSC_TRACE(pdata, ifdown, "Stopping driver");
2317
2318        unregister_netdev(dev);
2319
2320        mdiobus_unregister(pdata->mii_bus);
2321        mdiobus_free(pdata->mii_bus);
2322
2323        res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2324                                           "smsc911x-memory");
2325        if (!res)
2326                res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2327
2328        release_mem_region(res->start, resource_size(res));
2329
2330        iounmap(pdata->ioaddr);
2331
2332        (void)smsc911x_disable_resources(pdev);
2333        smsc911x_free_resources(pdev);
2334
2335        free_netdev(dev);
2336
2337        pm_runtime_put(&pdev->dev);
2338        pm_runtime_disable(&pdev->dev);
2339
2340        return 0;
2341}
2342
2343/* standard register acces */
2344static const struct smsc911x_ops standard_smsc911x_ops = {
2345        .reg_read = __smsc911x_reg_read,
2346        .reg_write = __smsc911x_reg_write,
2347        .rx_readfifo = smsc911x_rx_readfifo,
2348        .tx_writefifo = smsc911x_tx_writefifo,
2349};
2350
2351/* shifted register access */
2352static const struct smsc911x_ops shifted_smsc911x_ops = {
2353        .reg_read = __smsc911x_reg_read_shift,
2354        .reg_write = __smsc911x_reg_write_shift,
2355        .rx_readfifo = smsc911x_rx_readfifo_shift,
2356        .tx_writefifo = smsc911x_tx_writefifo_shift,
2357};
2358
2359static int smsc911x_probe_config(struct smsc911x_platform_config *config,
2360                                 struct device *dev)
2361{
2362        int phy_interface;
2363        u32 width = 0;
2364        int err;
2365
2366        phy_interface = device_get_phy_mode(dev);
2367        if (phy_interface < 0)
2368                phy_interface = PHY_INTERFACE_MODE_NA;
2369        config->phy_interface = phy_interface;
2370
2371        device_get_mac_address(dev, config->mac, ETH_ALEN);
2372
2373        err = device_property_read_u32(dev, "reg-io-width", &width);
2374        if (err == -ENXIO)
2375                return err;
2376        if (!err && width == 4)
2377                config->flags |= SMSC911X_USE_32BIT;
2378        else
2379                config->flags |= SMSC911X_USE_16BIT;
2380
2381        device_property_read_u32(dev, "reg-shift", &config->shift);
2382
2383        if (device_property_present(dev, "smsc,irq-active-high"))
2384                config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2385
2386        if (device_property_present(dev, "smsc,irq-push-pull"))
2387                config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2388
2389        if (device_property_present(dev, "smsc,force-internal-phy"))
2390                config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2391
2392        if (device_property_present(dev, "smsc,force-external-phy"))
2393                config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2394
2395        if (device_property_present(dev, "smsc,save-mac-address"))
2396                config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2397
2398        return 0;
2399}
2400
2401static int smsc911x_drv_probe(struct platform_device *pdev)
2402{
2403        struct net_device *dev;
2404        struct smsc911x_data *pdata;
2405        struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2406        struct resource *res;
2407        int res_size, irq;
2408        int retval;
2409
2410        res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2411                                           "smsc911x-memory");
2412        if (!res)
2413                res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2414        if (!res) {
2415                pr_warn("Could not allocate resource\n");
2416                retval = -ENODEV;
2417                goto out_0;
2418        }
2419        res_size = resource_size(res);
2420
2421        irq = platform_get_irq(pdev, 0);
2422        if (irq == -EPROBE_DEFER) {
2423                retval = -EPROBE_DEFER;
2424                goto out_0;
2425        } else if (irq <= 0) {
2426                pr_warn("Could not allocate irq resource\n");
2427                retval = -ENODEV;
2428                goto out_0;
2429        }
2430
2431        if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2432                retval = -EBUSY;
2433                goto out_0;
2434        }
2435
2436        dev = alloc_etherdev(sizeof(struct smsc911x_data));
2437        if (!dev) {
2438                retval = -ENOMEM;
2439                goto out_release_io_1;
2440        }
2441
2442        SET_NETDEV_DEV(dev, &pdev->dev);
2443
2444        pdata = netdev_priv(dev);
2445        dev->irq = irq;
2446        pdata->ioaddr = ioremap(res->start, res_size);
2447        if (!pdata->ioaddr) {
2448                retval = -ENOMEM;
2449                goto out_ioremap_fail;
2450        }
2451
2452        pdata->dev = dev;
2453        pdata->msg_enable = ((1 << debug) - 1);
2454
2455        platform_set_drvdata(pdev, dev);
2456
2457        retval = smsc911x_request_resources(pdev);
2458        if (retval)
2459                goto out_request_resources_fail;
2460
2461        retval = smsc911x_enable_resources(pdev);
2462        if (retval)
2463                goto out_enable_resources_fail;
2464
2465        if (pdata->ioaddr == NULL) {
2466                SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2467                retval = -ENOMEM;
2468                goto out_disable_resources;
2469        }
2470
2471        retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
2472        if (retval && config) {
2473                /* copy config parameters across to pdata */
2474                memcpy(&pdata->config, config, sizeof(pdata->config));
2475                retval = 0;
2476        }
2477
2478        if (retval) {
2479                SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2480                goto out_disable_resources;
2481        }
2482
2483        /* assume standard, non-shifted, access to HW registers */
2484        pdata->ops = &standard_smsc911x_ops;
2485        /* apply the right access if shifting is needed */
2486        if (pdata->config.shift)
2487                pdata->ops = &shifted_smsc911x_ops;
2488
2489        pm_runtime_enable(&pdev->dev);
2490        pm_runtime_get_sync(&pdev->dev);
2491
2492        retval = smsc911x_init(dev);
2493        if (retval < 0)
2494                goto out_init_fail;
2495
2496        netif_carrier_off(dev);
2497
2498        retval = smsc911x_mii_init(pdev, dev);
2499        if (retval) {
2500                SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2501                goto out_init_fail;
2502        }
2503
2504        retval = register_netdev(dev);
2505        if (retval) {
2506                SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2507                goto out_init_fail;
2508        } else {
2509                SMSC_TRACE(pdata, probe,
2510                           "Network interface: \"%s\"", dev->name);
2511        }
2512
2513        spin_lock_irq(&pdata->mac_lock);
2514
2515        /* Check if mac address has been specified when bringing interface up */
2516        if (is_valid_ether_addr(dev->dev_addr)) {
2517                smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2518                SMSC_TRACE(pdata, probe,
2519                           "MAC Address is specified by configuration");
2520        } else if (is_valid_ether_addr(pdata->config.mac)) {
2521                memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2522                SMSC_TRACE(pdata, probe,
2523                           "MAC Address specified by platform data");
2524        } else {
2525                /* Try reading mac address from device. if EEPROM is present
2526                 * it will already have been set */
2527                smsc_get_mac(dev);
2528
2529                if (is_valid_ether_addr(dev->dev_addr)) {
2530                        /* eeprom values are valid  so use them */
2531                        SMSC_TRACE(pdata, probe,
2532                                   "Mac Address is read from LAN911x EEPROM");
2533                } else {
2534                        /* eeprom values are invalid, generate random MAC */
2535                        eth_hw_addr_random(dev);
2536                        smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2537                        SMSC_TRACE(pdata, probe,
2538                                   "MAC Address is set to eth_random_addr");
2539                }
2540        }
2541
2542        spin_unlock_irq(&pdata->mac_lock);
2543
2544        netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2545
2546        return 0;
2547
2548out_init_fail:
2549        pm_runtime_put(&pdev->dev);
2550        pm_runtime_disable(&pdev->dev);
2551out_disable_resources:
2552        (void)smsc911x_disable_resources(pdev);
2553out_enable_resources_fail:
2554        smsc911x_free_resources(pdev);
2555out_request_resources_fail:
2556        iounmap(pdata->ioaddr);
2557out_ioremap_fail:
2558        free_netdev(dev);
2559out_release_io_1:
2560        release_mem_region(res->start, resource_size(res));
2561out_0:
2562        return retval;
2563}
2564
2565#ifdef CONFIG_PM
2566/* This implementation assumes the devices remains powered on its VDDVARIO
2567 * pins during suspend. */
2568
2569/* TODO: implement freeze/thaw callbacks for hibernation.*/
2570
2571static int smsc911x_suspend(struct device *dev)
2572{
2573        struct net_device *ndev = dev_get_drvdata(dev);
2574        struct smsc911x_data *pdata = netdev_priv(ndev);
2575
2576        if (netif_running(ndev)) {
2577                netif_stop_queue(ndev);
2578                netif_device_detach(ndev);
2579        }
2580
2581        /* enable wake on LAN, energy detection and the external PME
2582         * signal. */
2583        smsc911x_reg_write(pdata, PMT_CTRL,
2584                PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2585                PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2586
2587        pm_runtime_disable(dev);
2588        pm_runtime_set_suspended(dev);
2589
2590        return 0;
2591}
2592
2593static int smsc911x_resume(struct device *dev)
2594{
2595        struct net_device *ndev = dev_get_drvdata(dev);
2596        struct smsc911x_data *pdata = netdev_priv(ndev);
2597        unsigned int to = 100;
2598
2599        pm_runtime_enable(dev);
2600        pm_runtime_resume(dev);
2601
2602        /* Note 3.11 from the datasheet:
2603         *      "When the LAN9220 is in a power saving state, a write of any
2604         *       data to the BYTE_TEST register will wake-up the device."
2605         */
2606        smsc911x_reg_write(pdata, BYTE_TEST, 0);
2607
2608        /* poll the READY bit in PMT_CTRL. Any other access to the device is
2609         * forbidden while this bit isn't set. Try for 100ms and return -EIO
2610         * if it failed. */
2611        while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2612                udelay(1000);
2613
2614        if (to == 0)
2615                return -EIO;
2616
2617        if (netif_running(ndev)) {
2618                netif_device_attach(ndev);
2619                netif_start_queue(ndev);
2620        }
2621
2622        return 0;
2623}
2624
2625static const struct dev_pm_ops smsc911x_pm_ops = {
2626        .suspend        = smsc911x_suspend,
2627        .resume         = smsc911x_resume,
2628};
2629
2630#define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2631
2632#else
2633#define SMSC911X_PM_OPS NULL
2634#endif
2635
2636#ifdef CONFIG_OF
2637static const struct of_device_id smsc911x_dt_ids[] = {
2638        { .compatible = "smsc,lan9115", },
2639        { /* sentinel */ }
2640};
2641MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2642#endif
2643
2644static const struct acpi_device_id smsc911x_acpi_match[] = {
2645        { "ARMH9118", 0 },
2646        { }
2647};
2648MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
2649
2650static struct platform_driver smsc911x_driver = {
2651        .probe = smsc911x_drv_probe,
2652        .remove = smsc911x_drv_remove,
2653        .driver = {
2654                .name   = SMSC_CHIPNAME,
2655                .pm     = SMSC911X_PM_OPS,
2656                .of_match_table = of_match_ptr(smsc911x_dt_ids),
2657                .acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
2658        },
2659};
2660
2661/* Entry point for loading the module */
2662static int __init smsc911x_init_module(void)
2663{
2664        SMSC_INITIALIZE();
2665        return platform_driver_register(&smsc911x_driver);
2666}
2667
2668/* entry point for unloading the module */
2669static void __exit smsc911x_cleanup_module(void)
2670{
2671        platform_driver_unregister(&smsc911x_driver);
2672}
2673
2674module_init(smsc911x_init_module);
2675module_exit(smsc911x_cleanup_module);
2676