drivers/net/ethernet/smsc/smsc911x.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
__smsc911x_reg_read
__smsc911x_reg_read_shift
smsc911x_reg_read
__smsc911x_reg_write
__smsc911x_reg_write_shift
smsc911x_reg_write
smsc911x_tx_writefifo
smsc911x_tx_writefifo_shift
smsc911x_rx_readfifo
smsc911x_rx_readfifo_shift
smsc911x_enable_resources
smsc911x_disable_resources
smsc911x_request_resources
smsc911x_free_resources
smsc911x_mac_complete
smsc911x_mac_read
smsc911x_mac_write
smsc911x_mii_read
smsc911x_mii_write
smsc911x_phy_enable_external
smsc911x_phy_initialise_external
smsc911x_tx_get_txstatus
smsc911x_rx_get_rxstatus
smsc911x_phy_check_loopbackpkt
smsc911x_phy_reset
smsc911x_phy_loopbacktest
smsc911x_phy_update_flowcontrol
smsc911x_phy_adjust_link
smsc911x_mii_probe
smsc911x_mii_init
smsc911x_tx_get_txstatcount
smsc911x_tx_update_txcounters
smsc911x_rx_counterrors
smsc911x_rx_fastforward
smsc911x_poll
smsc911x_hash
smsc911x_rx_multicast_update
smsc911x_rx_multicast_update_workaround
smsc911x_phy_general_power_up
smsc911x_phy_disable_energy_detect
smsc911x_phy_enable_energy_detect
smsc911x_soft_reset
smsc911x_set_hw_mac_address
smsc911x_disable_irq_chip
smsc911x_irqhandler
smsc911x_open
smsc911x_stop
smsc911x_hard_start_xmit
smsc911x_get_stats
smsc911x_set_multicast_list
smsc911x_poll_controller
smsc911x_set_mac_address
smsc911x_do_ioctl
smsc911x_ethtool_getdrvinfo
smsc911x_ethtool_getmsglevel
smsc911x_ethtool_setmsglevel
smsc911x_ethtool_getregslen
smsc911x_ethtool_getregs
smsc911x_eeprom_enable_access
smsc911x_eeprom_send_cmd
smsc911x_eeprom_read_location
smsc911x_eeprom_write_location
smsc911x_ethtool_get_eeprom_len
smsc911x_ethtool_get_eeprom
smsc911x_ethtool_set_eeprom
smsc911x_read_mac_address
smsc911x_init
smsc911x_drv_remove
smsc911x_probe_config
smsc911x_drv_probe
smsc911x_suspend
smsc911x_resume
smsc911x_init_module
smsc911x_cleanup_module
   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 
  60 MODULE_LICENSE("GPL");
  61 MODULE_VERSION(SMSC_DRV_VERSION);
  62 MODULE_ALIAS("platform:smsc911x");
  63 
  64 #if USE_DEBUG > 0
  65 static int debug = 16;
  66 #else
  67 static int debug = 3;
  68 #endif
  69 
  70 module_param(debug, int, 0);
  71 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  72 
  73 struct smsc911x_data;
  74 
  75 struct 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 
  86 struct 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 
 148 static 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 
 161 static 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 
 177 static 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 
 189 static 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 
 206 static 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 
 225 static 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 */
 236 static inline void
 237 smsc911x_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();
 263 out:
 264         spin_unlock_irqrestore(&pdata->dev_lock, flags);
 265 }
 266 
 267 /* Writes a packet to the TX_DATA_FIFO - shifted version */
 268 static inline void
 269 smsc911x_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();
 297 out:
 298         spin_unlock_irqrestore(&pdata->dev_lock, flags);
 299 }
 300 
 301 /* Reads a packet out of the RX_DATA_FIFO */
 302 static inline void
 303 smsc911x_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();
 329 out:
 330         spin_unlock_irqrestore(&pdata->dev_lock, flags);
 331 }
 332 
 333 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
 334 static inline void
 335 smsc911x_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();
 363 out:
 364         spin_unlock_irqrestore(&pdata->dev_lock, flags);
 365 }
 366 
 367 /*
 368  * enable regulator and clock resources.
 369  */
 370 static 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  */
 394 static 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  */
 416 static 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  */
 457 static 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 */
 475 static 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 */
 493 static 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 */
 521 static 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 */
 553 static 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 
 583 out:
 584         spin_unlock_irqrestore(&pdata->mac_lock, flags);
 585         return reg;
 586 }
 587 
 588 /* Set a phy register */
 589 static 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 
 624 out:
 625         spin_unlock_irqrestore(&pdata->mac_lock, flags);
 626         return reg;
 627 }
 628 
 629 /* Switch to external phy. Assumes tx and rx are stopped. */
 630 static 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. */
 657 static 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 */
 681 static 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 */
 693 static 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
 705 static 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 
 811 static 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 
 835 static 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 
 906 static 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. */
 947 static 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 
1012 static 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 
1059 static 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 
1107 err_out_free_bus_2:
1108         mdiobus_free(pdata->mii_bus);
1109 err_out_1:
1110         return err;
1111 }
1112 
1113 /* Gets the number of tx statuses in the fifo */
1114 static 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 */
1121 static 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 */
1161 static void
1162 smsc911x_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 */
1183 static void
1184 smsc911x_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                 unsigned int temp;
1200                 while (pktwords--)
1201                         temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
1202         }
1203 }
1204 
1205 /* NAPI poll function */
1206 static int smsc911x_poll(struct napi_struct *napi, int budget)
1207 {
1208         struct smsc911x_data *pdata =
1209                 container_of(napi, struct smsc911x_data, napi);
1210         struct net_device *dev = pdata->dev;
1211         int npackets = 0;
1212 
1213         while (npackets < budget) {
1214                 unsigned int pktlength;
1215                 unsigned int pktwords;
1216                 struct sk_buff *skb;
1217                 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1218 
1219                 if (!rxstat) {
1220                         unsigned int temp;
1221                         /* We processed all packets available.  Tell NAPI it can
1222                          * stop polling then re-enable rx interrupts */
1223                         smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1224                         napi_complete(napi);
1225                         temp = smsc911x_reg_read(pdata, INT_EN);
1226                         temp |= INT_EN_RSFL_EN_;
1227                         smsc911x_reg_write(pdata, INT_EN, temp);
1228                         break;
1229                 }
1230 
1231                 /* Count packet for NAPI scheduling, even if it has an error.
1232                  * Error packets still require cycles to discard */
1233                 npackets++;
1234 
1235                 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1236                 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1237                 smsc911x_rx_counterrors(dev, rxstat);
1238 
1239                 if (unlikely(rxstat & RX_STS_ES_)) {
1240                         SMSC_WARN(pdata, rx_err,
1241                                   "Discarding packet with error bit set");
1242                         /* Packet has an error, discard it and continue with
1243                          * the next */
1244                         smsc911x_rx_fastforward(pdata, pktwords);
1245                         dev->stats.rx_dropped++;
1246                         continue;
1247                 }
1248 
1249                 skb = netdev_alloc_skb(dev, pktwords << 2);
1250                 if (unlikely(!skb)) {
1251                         SMSC_WARN(pdata, rx_err,
1252                                   "Unable to allocate skb for rx packet");
1253                         /* Drop the packet and stop this polling iteration */
1254                         smsc911x_rx_fastforward(pdata, pktwords);
1255                         dev->stats.rx_dropped++;
1256                         break;
1257                 }
1258 
1259                 pdata->ops->rx_readfifo(pdata,
1260                                  (unsigned int *)skb->data, pktwords);
1261 
1262                 /* Align IP on 16B boundary */
1263                 skb_reserve(skb, NET_IP_ALIGN);
1264                 skb_put(skb, pktlength - 4);
1265                 skb->protocol = eth_type_trans(skb, dev);
1266                 skb_checksum_none_assert(skb);
1267                 netif_receive_skb(skb);
1268 
1269                 /* Update counters */
1270                 dev->stats.rx_packets++;
1271                 dev->stats.rx_bytes += (pktlength - 4);
1272         }
1273 
1274         /* Return total received packets */
1275         return npackets;
1276 }
1277 
1278 /* Returns hash bit number for given MAC address
1279  * Example:
1280  * 01 00 5E 00 00 01 -> returns bit number 31 */
1281 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1282 {
1283         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1284 }
1285 
1286 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1287 {
1288         /* Performs the multicast & mac_cr update.  This is called when
1289          * safe on the current hardware, and with the mac_lock held */
1290         unsigned int mac_cr;
1291 
1292         SMSC_ASSERT_MAC_LOCK(pdata);
1293 
1294         mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1295         mac_cr |= pdata->set_bits_mask;
1296         mac_cr &= ~(pdata->clear_bits_mask);
1297         smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1298         smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1299         smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1300         SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1301                    mac_cr, pdata->hashhi, pdata->hashlo);
1302 }
1303 
1304 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1305 {
1306         unsigned int mac_cr;
1307 
1308         /* This function is only called for older LAN911x devices
1309          * (revA or revB), where MAC_CR, HASHH and HASHL should not
1310          * be modified during Rx - newer devices immediately update the
1311          * registers.
1312          *
1313          * This is called from interrupt context */
1314 
1315         spin_lock(&pdata->mac_lock);
1316 
1317         /* Check Rx has stopped */
1318         if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1319                 SMSC_WARN(pdata, drv, "Rx not stopped");
1320 
1321         /* Perform the update - safe to do now Rx has stopped */
1322         smsc911x_rx_multicast_update(pdata);
1323 
1324         /* Re-enable Rx */
1325         mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1326         mac_cr |= MAC_CR_RXEN_;
1327         smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1328 
1329         pdata->multicast_update_pending = 0;
1330 
1331         spin_unlock(&pdata->mac_lock);
1332 }
1333 
1334 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1335 {
1336         struct net_device *ndev = pdata->dev;
1337         struct phy_device *phy_dev = ndev->phydev;
1338         int rc = 0;
1339 
1340         if (!phy_dev)
1341                 return rc;
1342 
1343         /* If the internal PHY is in General Power-Down mode, all, except the
1344          * management interface, is powered-down and stays in that condition as
1345          * long as Phy register bit 0.11 is HIGH.
1346          *
1347          * In that case, clear the bit 0.11, so the PHY powers up and we can
1348          * access to the phy registers.
1349          */
1350         rc = phy_read(phy_dev, MII_BMCR);
1351         if (rc < 0) {
1352                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1353                 return rc;
1354         }
1355 
1356         /* If the PHY general power-down bit is not set is not necessary to
1357          * disable the general power down-mode.
1358          */
1359         if (rc & BMCR_PDOWN) {
1360                 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1361                 if (rc < 0) {
1362                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1363                         return rc;
1364                 }
1365 
1366                 usleep_range(1000, 1500);
1367         }
1368 
1369         return 0;
1370 }
1371 
1372 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1373 {
1374         struct net_device *ndev = pdata->dev;
1375         struct phy_device *phy_dev = ndev->phydev;
1376         int rc = 0;
1377 
1378         if (!phy_dev)
1379                 return rc;
1380 
1381         rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1382 
1383         if (rc < 0) {
1384                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1385                 return rc;
1386         }
1387 
1388         /* Only disable if energy detect mode is already enabled */
1389         if (rc & MII_LAN83C185_EDPWRDOWN) {
1390                 /* Disable energy detect mode for this SMSC Transceivers */
1391                 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1392                                rc & (~MII_LAN83C185_EDPWRDOWN));
1393 
1394                 if (rc < 0) {
1395                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1396                         return rc;
1397                 }
1398                 /* Allow PHY to wakeup */
1399                 mdelay(2);
1400         }
1401 
1402         return 0;
1403 }
1404 
1405 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1406 {
1407         struct net_device *ndev = pdata->dev;
1408         struct phy_device *phy_dev = ndev->phydev;
1409         int rc = 0;
1410 
1411         if (!phy_dev)
1412                 return rc;
1413 
1414         rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1415 
1416         if (rc < 0) {
1417                 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1418                 return rc;
1419         }
1420 
1421         /* Only enable if energy detect mode is already disabled */
1422         if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1423                 /* Enable energy detect mode for this SMSC Transceivers */
1424                 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1425                                rc | MII_LAN83C185_EDPWRDOWN);
1426 
1427                 if (rc < 0) {
1428                         SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1429                         return rc;
1430                 }
1431         }
1432         return 0;
1433 }
1434 
1435 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1436 {
1437         unsigned int timeout;
1438         unsigned int temp;
1439         int ret;
1440         unsigned int reset_offset = HW_CFG;
1441         unsigned int reset_mask = HW_CFG_SRST_;
1442 
1443         /*
1444          * Make sure to power-up the PHY chip before doing a reset, otherwise
1445          * the reset fails.
1446          */
1447         ret = smsc911x_phy_general_power_up(pdata);
1448         if (ret) {
1449                 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1450                 return ret;
1451         }
1452 
1453         /*
1454          * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1455          * are initialized in a Energy Detect Power-Down mode that prevents
1456          * the MAC chip to be software reseted. So we have to wakeup the PHY
1457          * before.
1458          */
1459         if (pdata->generation == 4) {
1460                 ret = smsc911x_phy_disable_energy_detect(pdata);
1461 
1462                 if (ret) {
1463                         SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1464                         return ret;
1465                 }
1466         }
1467 
1468         if ((pdata->idrev & 0xFFFF0000) == LAN9250) {
1469                 /* special reset for  LAN9250 */
1470                 reset_offset = RESET_CTL;
1471                 reset_mask = RESET_CTL_DIGITAL_RST_;
1472         }
1473 
1474         /* Reset the LAN911x */
1475         smsc911x_reg_write(pdata, reset_offset, reset_mask);
1476 
1477         /* verify reset bit is cleared */
1478         timeout = 10;
1479         do {
1480                 udelay(10);
1481                 temp = smsc911x_reg_read(pdata, reset_offset);
1482         } while ((--timeout) && (temp & reset_mask));
1483 
1484         if (unlikely(temp & reset_mask)) {
1485                 SMSC_WARN(pdata, drv, "Failed to complete reset");
1486                 return -EIO;
1487         }
1488 
1489         if (pdata->generation == 4) {
1490                 ret = smsc911x_phy_enable_energy_detect(pdata);
1491 
1492                 if (ret) {
1493                         SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1494                         return ret;
1495                 }
1496         }
1497 
1498         return 0;
1499 }
1500 
1501 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1502 static void
1503 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1504 {
1505         u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1506         u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1507             (dev_addr[1] << 8) | dev_addr[0];
1508 
1509         SMSC_ASSERT_MAC_LOCK(pdata);
1510 
1511         smsc911x_mac_write(pdata, ADDRH, mac_high16);
1512         smsc911x_mac_write(pdata, ADDRL, mac_low32);
1513 }
1514 
1515 static void smsc911x_disable_irq_chip(struct net_device *dev)
1516 {
1517         struct smsc911x_data *pdata = netdev_priv(dev);
1518 
1519         smsc911x_reg_write(pdata, INT_EN, 0);
1520         smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1521 }
1522 
1523 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1524 {
1525         struct net_device *dev = dev_id;
1526         struct smsc911x_data *pdata = netdev_priv(dev);
1527         u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1528         u32 inten = smsc911x_reg_read(pdata, INT_EN);
1529         int serviced = IRQ_NONE;
1530         u32 temp;
1531 
1532         if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1533                 temp = smsc911x_reg_read(pdata, INT_EN);
1534                 temp &= (~INT_EN_SW_INT_EN_);
1535                 smsc911x_reg_write(pdata, INT_EN, temp);
1536                 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1537                 pdata->software_irq_signal = 1;
1538                 smp_wmb();
1539                 serviced = IRQ_HANDLED;
1540         }
1541 
1542         if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1543                 /* Called when there is a multicast update scheduled and
1544                  * it is now safe to complete the update */
1545                 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1546                 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1547                 if (pdata->multicast_update_pending)
1548                         smsc911x_rx_multicast_update_workaround(pdata);
1549                 serviced = IRQ_HANDLED;
1550         }
1551 
1552         if (intsts & inten & INT_STS_TDFA_) {
1553                 temp = smsc911x_reg_read(pdata, FIFO_INT);
1554                 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1555                 smsc911x_reg_write(pdata, FIFO_INT, temp);
1556                 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1557                 netif_wake_queue(dev);
1558                 serviced = IRQ_HANDLED;
1559         }
1560 
1561         if (unlikely(intsts & inten & INT_STS_RXE_)) {
1562                 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1563                 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1564                 serviced = IRQ_HANDLED;
1565         }
1566 
1567         if (likely(intsts & inten & INT_STS_RSFL_)) {
1568                 if (likely(napi_schedule_prep(&pdata->napi))) {
1569                         /* Disable Rx interrupts */
1570                         temp = smsc911x_reg_read(pdata, INT_EN);
1571                         temp &= (~INT_EN_RSFL_EN_);
1572                         smsc911x_reg_write(pdata, INT_EN, temp);
1573                         /* Schedule a NAPI poll */
1574                         __napi_schedule(&pdata->napi);
1575                 } else {
1576                         SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1577                 }
1578                 serviced = IRQ_HANDLED;
1579         }
1580 
1581         return serviced;
1582 }
1583 
1584 static int smsc911x_open(struct net_device *dev)
1585 {
1586         struct smsc911x_data *pdata = netdev_priv(dev);
1587         unsigned int timeout;
1588         unsigned int temp;
1589         unsigned int intcfg;
1590         int retval;
1591         int irq_flags;
1592 
1593         /* find and start the given phy */
1594         if (!dev->phydev) {
1595                 retval = smsc911x_mii_probe(dev);
1596                 if (retval < 0) {
1597                         SMSC_WARN(pdata, probe, "Error starting phy");
1598                         goto out;
1599                 }
1600         }
1601 
1602         /* Reset the LAN911x */
1603         retval = smsc911x_soft_reset(pdata);
1604         if (retval) {
1605                 SMSC_WARN(pdata, hw, "soft reset failed");
1606                 goto mii_free_out;
1607         }
1608 
1609         smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1610         smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1611 
1612         /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1613         spin_lock_irq(&pdata->mac_lock);
1614         smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1615         spin_unlock_irq(&pdata->mac_lock);
1616 
1617         /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1618         timeout = 50;
1619         while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1620                --timeout) {
1621                 udelay(10);
1622         }
1623 
1624         if (unlikely(timeout == 0))
1625                 SMSC_WARN(pdata, ifup,
1626                           "Timed out waiting for EEPROM busy bit to clear");
1627 
1628         smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1629 
1630         /* The soft reset above cleared the device's MAC address,
1631          * restore it from local copy (set in probe) */
1632         spin_lock_irq(&pdata->mac_lock);
1633         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1634         spin_unlock_irq(&pdata->mac_lock);
1635 
1636         /* Initialise irqs, but leave all sources disabled */
1637         smsc911x_disable_irq_chip(dev);
1638 
1639         /* Set interrupt deassertion to 100uS */
1640         intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1641 
1642         if (pdata->config.irq_polarity) {
1643                 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1644                 intcfg |= INT_CFG_IRQ_POL_;
1645         } else {
1646                 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1647         }
1648 
1649         if (pdata->config.irq_type) {
1650                 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1651                 intcfg |= INT_CFG_IRQ_TYPE_;
1652         } else {
1653                 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1654         }
1655 
1656         smsc911x_reg_write(pdata, INT_CFG, intcfg);
1657 
1658         SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1659         pdata->software_irq_signal = 0;
1660         smp_wmb();
1661 
1662         irq_flags = irq_get_trigger_type(dev->irq);
1663         retval = request_irq(dev->irq, smsc911x_irqhandler,
1664                              irq_flags | IRQF_SHARED, dev->name, dev);
1665         if (retval) {
1666                 SMSC_WARN(pdata, probe,
1667                           "Unable to claim requested irq: %d", dev->irq);
1668                 goto mii_free_out;
1669         }
1670 
1671         temp = smsc911x_reg_read(pdata, INT_EN);
1672         temp |= INT_EN_SW_INT_EN_;
1673         smsc911x_reg_write(pdata, INT_EN, temp);
1674 
1675         timeout = 1000;
1676         while (timeout--) {
1677                 if (pdata->software_irq_signal)
1678                         break;
1679                 msleep(1);
1680         }
1681 
1682         if (!pdata->software_irq_signal) {
1683                 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1684                             dev->irq);
1685                 retval = -ENODEV;
1686                 goto irq_stop_out;
1687         }
1688         SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1689                    dev->irq);
1690 
1691         netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1692                     (unsigned long)pdata->ioaddr, dev->irq);
1693 
1694         /* Reset the last known duplex and carrier */
1695         pdata->last_duplex = -1;
1696         pdata->last_carrier = -1;
1697 
1698         /* Bring the PHY up */
1699         phy_start(dev->phydev);
1700 
1701         temp = smsc911x_reg_read(pdata, HW_CFG);
1702         /* Preserve TX FIFO size and external PHY configuration */
1703         temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1704         temp |= HW_CFG_SF_;
1705         smsc911x_reg_write(pdata, HW_CFG, temp);
1706 
1707         temp = smsc911x_reg_read(pdata, FIFO_INT);
1708         temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1709         temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1710         smsc911x_reg_write(pdata, FIFO_INT, temp);
1711 
1712         /* set RX Data offset to 2 bytes for alignment */
1713         smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1714 
1715         /* enable NAPI polling before enabling RX interrupts */
1716         napi_enable(&pdata->napi);
1717 
1718         temp = smsc911x_reg_read(pdata, INT_EN);
1719         temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1720         smsc911x_reg_write(pdata, INT_EN, temp);
1721 
1722         spin_lock_irq(&pdata->mac_lock);
1723         temp = smsc911x_mac_read(pdata, MAC_CR);
1724         temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1725         smsc911x_mac_write(pdata, MAC_CR, temp);
1726         spin_unlock_irq(&pdata->mac_lock);
1727 
1728         smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1729 
1730         netif_start_queue(dev);
1731         return 0;
1732 
1733 irq_stop_out:
1734         free_irq(dev->irq, dev);
1735 mii_free_out:
1736         phy_disconnect(dev->phydev);
1737         dev->phydev = NULL;
1738 out:
1739         return retval;
1740 }
1741 
1742 /* Entry point for stopping the interface */
1743 static int smsc911x_stop(struct net_device *dev)
1744 {
1745         struct smsc911x_data *pdata = netdev_priv(dev);
1746         unsigned int temp;
1747 
1748         /* Disable all device interrupts */
1749         temp = smsc911x_reg_read(pdata, INT_CFG);
1750         temp &= ~INT_CFG_IRQ_EN_;
1751         smsc911x_reg_write(pdata, INT_CFG, temp);
1752 
1753         /* Stop Tx and Rx polling */
1754         netif_stop_queue(dev);
1755         napi_disable(&pdata->napi);
1756 
1757         /* At this point all Rx and Tx activity is stopped */
1758         dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1759         smsc911x_tx_update_txcounters(dev);
1760 
1761         free_irq(dev->irq, dev);
1762 
1763         /* Bring the PHY down */
1764         if (dev->phydev) {
1765                 phy_stop(dev->phydev);
1766                 phy_disconnect(dev->phydev);
1767                 dev->phydev = NULL;
1768         }
1769         netif_carrier_off(dev);
1770 
1771         SMSC_TRACE(pdata, ifdown, "Interface stopped");
1772         return 0;
1773 }
1774 
1775 /* Entry point for transmitting a packet */
1776 static netdev_tx_t
1777 smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1778 {
1779         struct smsc911x_data *pdata = netdev_priv(dev);
1780         unsigned int freespace;
1781         unsigned int tx_cmd_a;
1782         unsigned int tx_cmd_b;
1783         unsigned int temp;
1784         u32 wrsz;
1785         ulong bufp;
1786 
1787         freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1788 
1789         if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1790                 SMSC_WARN(pdata, tx_err,
1791                           "Tx data fifo low, space available: %d", freespace);
1792 
1793         /* Word alignment adjustment */
1794         tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1795         tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1796         tx_cmd_a |= (unsigned int)skb->len;
1797 
1798         tx_cmd_b = ((unsigned int)skb->len) << 16;
1799         tx_cmd_b |= (unsigned int)skb->len;
1800 
1801         smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1802         smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1803 
1804         bufp = (ulong)skb->data & (~0x3);
1805         wrsz = (u32)skb->len + 3;
1806         wrsz += (u32)((ulong)skb->data & 0x3);
1807         wrsz >>= 2;
1808 
1809         pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1810         freespace -= (skb->len + 32);
1811         skb_tx_timestamp(skb);
1812         dev_consume_skb_any(skb);
1813 
1814         if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1815                 smsc911x_tx_update_txcounters(dev);
1816 
1817         if (freespace < TX_FIFO_LOW_THRESHOLD) {
1818                 netif_stop_queue(dev);
1819                 temp = smsc911x_reg_read(pdata, FIFO_INT);
1820                 temp &= 0x00FFFFFF;
1821                 temp |= 0x32000000;
1822                 smsc911x_reg_write(pdata, FIFO_INT, temp);
1823         }
1824 
1825         return NETDEV_TX_OK;
1826 }
1827 
1828 /* Entry point for getting status counters */
1829 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1830 {
1831         struct smsc911x_data *pdata = netdev_priv(dev);
1832         smsc911x_tx_update_txcounters(dev);
1833         dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1834         return &dev->stats;
1835 }
1836 
1837 /* Entry point for setting addressing modes */
1838 static void smsc911x_set_multicast_list(struct net_device *dev)
1839 {
1840         struct smsc911x_data *pdata = netdev_priv(dev);
1841         unsigned long flags;
1842 
1843         if (dev->flags & IFF_PROMISC) {
1844                 /* Enabling promiscuous mode */
1845                 pdata->set_bits_mask = MAC_CR_PRMS_;
1846                 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1847                 pdata->hashhi = 0;
1848                 pdata->hashlo = 0;
1849         } else if (dev->flags & IFF_ALLMULTI) {
1850                 /* Enabling all multicast mode */
1851                 pdata->set_bits_mask = MAC_CR_MCPAS_;
1852                 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1853                 pdata->hashhi = 0;
1854                 pdata->hashlo = 0;
1855         } else if (!netdev_mc_empty(dev)) {
1856                 /* Enabling specific multicast addresses */
1857                 unsigned int hash_high = 0;
1858                 unsigned int hash_low = 0;
1859                 struct netdev_hw_addr *ha;
1860 
1861                 pdata->set_bits_mask = MAC_CR_HPFILT_;
1862                 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1863 
1864                 netdev_for_each_mc_addr(ha, dev) {
1865                         unsigned int bitnum = smsc911x_hash(ha->addr);
1866                         unsigned int mask = 0x01 << (bitnum & 0x1F);
1867 
1868                         if (bitnum & 0x20)
1869                                 hash_high |= mask;
1870                         else
1871                                 hash_low |= mask;
1872                 }
1873 
1874                 pdata->hashhi = hash_high;
1875                 pdata->hashlo = hash_low;
1876         } else {
1877                 /* Enabling local MAC address only */
1878                 pdata->set_bits_mask = 0;
1879                 pdata->clear_bits_mask =
1880                     (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1881                 pdata->hashhi = 0;
1882                 pdata->hashlo = 0;
1883         }
1884 
1885         spin_lock_irqsave(&pdata->mac_lock, flags);
1886 
1887         if (pdata->generation <= 1) {
1888                 /* Older hardware revision - cannot change these flags while
1889                  * receiving data */
1890                 if (!pdata->multicast_update_pending) {
1891                         unsigned int temp;
1892                         SMSC_TRACE(pdata, hw, "scheduling mcast update");
1893                         pdata->multicast_update_pending = 1;
1894 
1895                         /* Request the hardware to stop, then perform the
1896                          * update when we get an RX_STOP interrupt */
1897                         temp = smsc911x_mac_read(pdata, MAC_CR);
1898                         temp &= ~(MAC_CR_RXEN_);
1899                         smsc911x_mac_write(pdata, MAC_CR, temp);
1900                 } else {
1901                         /* There is another update pending, this should now
1902                          * use the newer values */
1903                 }
1904         } else {
1905                 /* Newer hardware revision - can write immediately */
1906                 smsc911x_rx_multicast_update(pdata);
1907         }
1908 
1909         spin_unlock_irqrestore(&pdata->mac_lock, flags);
1910 }
1911 
1912 #ifdef CONFIG_NET_POLL_CONTROLLER
1913 static void smsc911x_poll_controller(struct net_device *dev)
1914 {
1915         disable_irq(dev->irq);
1916         smsc911x_irqhandler(0, dev);
1917         enable_irq(dev->irq);
1918 }
1919 #endif                          /* CONFIG_NET_POLL_CONTROLLER */
1920 
1921 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1922 {
1923         struct smsc911x_data *pdata = netdev_priv(dev);
1924         struct sockaddr *addr = p;
1925 
1926         /* On older hardware revisions we cannot change the mac address
1927          * registers while receiving data.  Newer devices can safely change
1928          * this at any time. */
1929         if (pdata->generation <= 1 && netif_running(dev))
1930                 return -EBUSY;
1931 
1932         if (!is_valid_ether_addr(addr->sa_data))
1933                 return -EADDRNOTAVAIL;
1934 
1935         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1936 
1937         spin_lock_irq(&pdata->mac_lock);
1938         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1939         spin_unlock_irq(&pdata->mac_lock);
1940 
1941         netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1942 
1943         return 0;
1944 }
1945 
1946 /* Standard ioctls for mii-tool */
1947 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1948 {
1949         if (!netif_running(dev) || !dev->phydev)
1950                 return -EINVAL;
1951 
1952         return phy_mii_ioctl(dev->phydev, ifr, cmd);
1953 }
1954 
1955 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1956                                         struct ethtool_drvinfo *info)
1957 {
1958         strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1959         strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1960         strlcpy(info->bus_info, dev_name(dev->dev.parent),
1961                 sizeof(info->bus_info));
1962 }
1963 
1964 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1965 {
1966         struct smsc911x_data *pdata = netdev_priv(dev);
1967         return pdata->msg_enable;
1968 }
1969 
1970 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1971 {
1972         struct smsc911x_data *pdata = netdev_priv(dev);
1973         pdata->msg_enable = level;
1974 }
1975 
1976 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1977 {
1978         return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1979             sizeof(u32);
1980 }
1981 
1982 static void
1983 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1984                          void *buf)
1985 {
1986         struct smsc911x_data *pdata = netdev_priv(dev);
1987         struct phy_device *phy_dev = dev->phydev;
1988         unsigned long flags;
1989         unsigned int i;
1990         unsigned int j = 0;
1991         u32 *data = buf;
1992 
1993         regs->version = pdata->idrev;
1994         for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1995                 data[j++] = smsc911x_reg_read(pdata, i);
1996 
1997         for (i = MAC_CR; i <= WUCSR; i++) {
1998                 spin_lock_irqsave(&pdata->mac_lock, flags);
1999                 data[j++] = smsc911x_mac_read(pdata, i);
2000                 spin_unlock_irqrestore(&pdata->mac_lock, flags);
2001         }
2002 
2003         for (i = 0; i <= 31; i++)
2004                 data[j++] = smsc911x_mii_read(phy_dev->mdio.bus,
2005                                               phy_dev->mdio.addr, i);
2006 }
2007 
2008 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
2009 {
2010         unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2011         temp &= ~GPIO_CFG_EEPR_EN_;
2012         smsc911x_reg_write(pdata, GPIO_CFG, temp);
2013         msleep(1);
2014 }
2015 
2016 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2017 {
2018         int timeout = 100;
2019         u32 e2cmd;
2020 
2021         SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2022         if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2023                 SMSC_WARN(pdata, drv, "Busy at start");
2024                 return -EBUSY;
2025         }
2026 
2027         e2cmd = op | E2P_CMD_EPC_BUSY_;
2028         smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2029 
2030         do {
2031                 msleep(1);
2032                 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2033         } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2034 
2035         if (!timeout) {
2036                 SMSC_TRACE(pdata, drv, "TIMED OUT");
2037                 return -EAGAIN;
2038         }
2039 
2040         if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2041                 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2042                 return -EINVAL;
2043         }
2044 
2045         return 0;
2046 }
2047 
2048 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2049                                          u8 address, u8 *data)
2050 {
2051         u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2052         int ret;
2053 
2054         SMSC_TRACE(pdata, drv, "address 0x%x", address);
2055         ret = smsc911x_eeprom_send_cmd(pdata, op);
2056 
2057         if (!ret)
2058                 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2059 
2060         return ret;
2061 }
2062 
2063 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2064                                           u8 address, u8 data)
2065 {
2066         u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2067         u32 temp;
2068         int ret;
2069 
2070         SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2071         ret = smsc911x_eeprom_send_cmd(pdata, op);
2072 
2073         if (!ret) {
2074                 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2075                 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2076 
2077                 /* Workaround for hardware read-after-write restriction */
2078                 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2079 
2080                 ret = smsc911x_eeprom_send_cmd(pdata, op);
2081         }
2082 
2083         return ret;
2084 }
2085 
2086 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2087 {
2088         return SMSC911X_EEPROM_SIZE;
2089 }
2090 
2091 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2092                                        struct ethtool_eeprom *eeprom, u8 *data)
2093 {
2094         struct smsc911x_data *pdata = netdev_priv(dev);
2095         u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2096         int len;
2097         int i;
2098 
2099         smsc911x_eeprom_enable_access(pdata);
2100 
2101         len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2102         for (i = 0; i < len; i++) {
2103                 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2104                 if (ret < 0) {
2105                         eeprom->len = 0;
2106                         return ret;
2107                 }
2108         }
2109 
2110         memcpy(data, &eeprom_data[eeprom->offset], len);
2111         eeprom->len = len;
2112         return 0;
2113 }
2114 
2115 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2116                                        struct ethtool_eeprom *eeprom, u8 *data)
2117 {
2118         int ret;
2119         struct smsc911x_data *pdata = netdev_priv(dev);
2120 
2121         smsc911x_eeprom_enable_access(pdata);
2122         smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2123         ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2124         smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2125 
2126         /* Single byte write, according to man page */
2127         eeprom->len = 1;
2128 
2129         return ret;
2130 }
2131 
2132 static const struct ethtool_ops smsc911x_ethtool_ops = {
2133         .get_link = ethtool_op_get_link,
2134         .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2135         .nway_reset = phy_ethtool_nway_reset,
2136         .get_msglevel = smsc911x_ethtool_getmsglevel,
2137         .set_msglevel = smsc911x_ethtool_setmsglevel,
2138         .get_regs_len = smsc911x_ethtool_getregslen,
2139         .get_regs = smsc911x_ethtool_getregs,
2140         .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2141         .get_eeprom = smsc911x_ethtool_get_eeprom,
2142         .set_eeprom = smsc911x_ethtool_set_eeprom,
2143         .get_ts_info = ethtool_op_get_ts_info,
2144         .get_link_ksettings = phy_ethtool_get_link_ksettings,
2145         .set_link_ksettings = phy_ethtool_set_link_ksettings,
2146 };
2147 
2148 static const struct net_device_ops smsc911x_netdev_ops = {
2149         .ndo_open               = smsc911x_open,
2150         .ndo_stop               = smsc911x_stop,
2151         .ndo_start_xmit         = smsc911x_hard_start_xmit,
2152         .ndo_get_stats          = smsc911x_get_stats,
2153         .ndo_set_rx_mode        = smsc911x_set_multicast_list,
2154         .ndo_do_ioctl           = smsc911x_do_ioctl,
2155         .ndo_validate_addr      = eth_validate_addr,
2156         .ndo_set_mac_address    = smsc911x_set_mac_address,
2157 #ifdef CONFIG_NET_POLL_CONTROLLER
2158         .ndo_poll_controller    = smsc911x_poll_controller,
2159 #endif
2160 };
2161 
2162 /* copies the current mac address from hardware to dev->dev_addr */
2163 static void smsc911x_read_mac_address(struct net_device *dev)
2164 {
2165         struct smsc911x_data *pdata = netdev_priv(dev);
2166         u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2167         u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2168 
2169         dev->dev_addr[0] = (u8)(mac_low32);
2170         dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2171         dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2172         dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2173         dev->dev_addr[4] = (u8)(mac_high16);
2174         dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2175 }
2176 
2177 /* Initializing private device structures, only called from probe */
2178 static int smsc911x_init(struct net_device *dev)
2179 {
2180         struct smsc911x_data *pdata = netdev_priv(dev);
2181         unsigned int byte_test, mask;
2182         unsigned int to = 100;
2183 
2184         SMSC_TRACE(pdata, probe, "Driver Parameters:");
2185         SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2186                    (unsigned long)pdata->ioaddr);
2187         SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2188         SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2189 
2190         spin_lock_init(&pdata->dev_lock);
2191         spin_lock_init(&pdata->mac_lock);
2192 
2193         if (pdata->ioaddr == NULL) {
2194                 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2195                 return -ENODEV;
2196         }
2197 
2198         /*
2199          * poll the READY bit in PMT_CTRL. Any other access to the device is
2200          * forbidden while this bit isn't set. Try for 100ms
2201          *
2202          * Note that this test is done before the WORD_SWAP register is
2203          * programmed. So in some configurations the READY bit is at 16 before
2204          * WORD_SWAP is written to. This issue is worked around by waiting
2205          * until either bit 0 or bit 16 gets set in PMT_CTRL.
2206          *
2207          * SMSC has confirmed that checking bit 16 (marked as reserved in
2208          * the datasheet) is fine since these bits "will either never be set
2209          * or can only go high after READY does (so also indicate the device
2210          * is ready)".
2211          */
2212 
2213         mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2214         while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2215                 udelay(1000);
2216 
2217         if (to == 0) {
2218                 netdev_err(dev, "Device not READY in 100ms aborting\n");
2219                 return -ENODEV;
2220         }
2221 
2222         /* Check byte ordering */
2223         byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2224         SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2225         if (byte_test == 0x43218765) {
2226                 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2227                            "applying WORD_SWAP");
2228                 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2229 
2230                 /* 1 dummy read of BYTE_TEST is needed after a write to
2231                  * WORD_SWAP before its contents are valid */
2232                 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2233 
2234                 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2235         }
2236 
2237         if (byte_test != 0x87654321) {
2238                 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2239                 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2240                         SMSC_WARN(pdata, probe,
2241                                   "top 16 bits equal to bottom 16 bits");
2242                         SMSC_TRACE(pdata, probe,
2243                                    "This may mean the chip is set "
2244                                    "for 32 bit while the bus is reading 16 bit");
2245                 }
2246                 return -ENODEV;
2247         }
2248 
2249         /* Default generation to zero (all workarounds apply) */
2250         pdata->generation = 0;
2251 
2252         pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2253         switch (pdata->idrev & 0xFFFF0000) {
2254         case LAN9118:
2255         case LAN9117:
2256         case LAN9116:
2257         case LAN9115:
2258         case LAN89218:
2259                 /* LAN911[5678] family */
2260                 pdata->generation = pdata->idrev & 0x0000FFFF;
2261                 break;
2262 
2263         case LAN9218:
2264         case LAN9217:
2265         case LAN9216:
2266         case LAN9215:
2267                 /* LAN921[5678] family */
2268                 pdata->generation = 3;
2269                 break;
2270 
2271         case LAN9210:
2272         case LAN9211:
2273         case LAN9220:
2274         case LAN9221:
2275         case LAN9250:
2276                 /* LAN9210/LAN9211/LAN9220/LAN9221/LAN9250 */
2277                 pdata->generation = 4;
2278                 break;
2279 
2280         default:
2281                 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2282                           pdata->idrev);
2283                 return -ENODEV;
2284         }
2285 
2286         SMSC_TRACE(pdata, probe,
2287                    "LAN911x identified, idrev: 0x%08X, generation: %d",
2288                    pdata->idrev, pdata->generation);
2289 
2290         if (pdata->generation == 0)
2291                 SMSC_WARN(pdata, probe,
2292                           "This driver is not intended for this chip revision");
2293 
2294         /* workaround for platforms without an eeprom, where the mac address
2295          * is stored elsewhere and set by the bootloader.  This saves the
2296          * mac address before resetting the device */
2297         if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2298                 spin_lock_irq(&pdata->mac_lock);
2299                 smsc911x_read_mac_address(dev);
2300                 spin_unlock_irq(&pdata->mac_lock);
2301         }
2302 
2303         /* Reset the LAN911x */
2304         if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
2305                 return -ENODEV;
2306 
2307         dev->flags |= IFF_MULTICAST;
2308         netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2309         dev->netdev_ops = &smsc911x_netdev_ops;
2310         dev->ethtool_ops = &smsc911x_ethtool_ops;
2311 
2312         return 0;
2313 }
2314 
2315 static int smsc911x_drv_remove(struct platform_device *pdev)
2316 {
2317         struct net_device *dev;
2318         struct smsc911x_data *pdata;
2319         struct resource *res;
2320 
2321         dev = platform_get_drvdata(pdev);
2322         BUG_ON(!dev);
2323         pdata = netdev_priv(dev);
2324         BUG_ON(!pdata);
2325         BUG_ON(!pdata->ioaddr);
2326 
2327         SMSC_TRACE(pdata, ifdown, "Stopping driver");
2328 
2329         unregister_netdev(dev);
2330 
2331         mdiobus_unregister(pdata->mii_bus);
2332         mdiobus_free(pdata->mii_bus);
2333 
2334         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2335                                            "smsc911x-memory");
2336         if (!res)
2337                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2338 
2339         release_mem_region(res->start, resource_size(res));
2340 
2341         iounmap(pdata->ioaddr);
2342 
2343         (void)smsc911x_disable_resources(pdev);
2344         smsc911x_free_resources(pdev);
2345 
2346         free_netdev(dev);
2347 
2348         pm_runtime_put(&pdev->dev);
2349         pm_runtime_disable(&pdev->dev);
2350 
2351         return 0;
2352 }
2353 
2354 /* standard register acces */
2355 static const struct smsc911x_ops standard_smsc911x_ops = {
2356         .reg_read = __smsc911x_reg_read,
2357         .reg_write = __smsc911x_reg_write,
2358         .rx_readfifo = smsc911x_rx_readfifo,
2359         .tx_writefifo = smsc911x_tx_writefifo,
2360 };
2361 
2362 /* shifted register access */
2363 static const struct smsc911x_ops shifted_smsc911x_ops = {
2364         .reg_read = __smsc911x_reg_read_shift,
2365         .reg_write = __smsc911x_reg_write_shift,
2366         .rx_readfifo = smsc911x_rx_readfifo_shift,
2367         .tx_writefifo = smsc911x_tx_writefifo_shift,
2368 };
2369 
2370 static int smsc911x_probe_config(struct smsc911x_platform_config *config,
2371                                  struct device *dev)
2372 {
2373         int phy_interface;
2374         u32 width = 0;
2375         int err;
2376 
2377         phy_interface = device_get_phy_mode(dev);
2378         if (phy_interface < 0)
2379                 phy_interface = PHY_INTERFACE_MODE_NA;
2380         config->phy_interface = phy_interface;
2381 
2382         device_get_mac_address(dev, config->mac, ETH_ALEN);
2383 
2384         err = device_property_read_u32(dev, "reg-io-width", &width);
2385         if (err == -ENXIO)
2386                 return err;
2387         if (!err && width == 4)
2388                 config->flags |= SMSC911X_USE_32BIT;
2389         else
2390                 config->flags |= SMSC911X_USE_16BIT;
2391 
2392         device_property_read_u32(dev, "reg-shift", &config->shift);
2393 
2394         if (device_property_present(dev, "smsc,irq-active-high"))
2395                 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2396 
2397         if (device_property_present(dev, "smsc,irq-push-pull"))
2398                 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2399 
2400         if (device_property_present(dev, "smsc,force-internal-phy"))
2401                 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2402 
2403         if (device_property_present(dev, "smsc,force-external-phy"))
2404                 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2405 
2406         if (device_property_present(dev, "smsc,save-mac-address"))
2407                 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2408 
2409         return 0;
2410 }
2411 
2412 static int smsc911x_drv_probe(struct platform_device *pdev)
2413 {
2414         struct net_device *dev;
2415         struct smsc911x_data *pdata;
2416         struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2417         struct resource *res;
2418         int res_size, irq;
2419         int retval;
2420 
2421         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2422                                            "smsc911x-memory");
2423         if (!res)
2424                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2425         if (!res) {
2426                 pr_warn("Could not allocate resource\n");
2427                 retval = -ENODEV;
2428                 goto out_0;
2429         }
2430         res_size = resource_size(res);
2431 
2432         irq = platform_get_irq(pdev, 0);
2433         if (irq == -EPROBE_DEFER) {
2434                 retval = -EPROBE_DEFER;
2435                 goto out_0;
2436         } else if (irq <= 0) {
2437                 pr_warn("Could not allocate irq resource\n");
2438                 retval = -ENODEV;
2439                 goto out_0;
2440         }
2441 
2442         if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2443                 retval = -EBUSY;
2444                 goto out_0;
2445         }
2446 
2447         dev = alloc_etherdev(sizeof(struct smsc911x_data));
2448         if (!dev) {
2449                 retval = -ENOMEM;
2450                 goto out_release_io_1;
2451         }
2452 
2453         SET_NETDEV_DEV(dev, &pdev->dev);
2454 
2455         pdata = netdev_priv(dev);
2456         dev->irq = irq;
2457         pdata->ioaddr = ioremap_nocache(res->start, res_size);
2458         if (!pdata->ioaddr) {
2459                 retval = -ENOMEM;
2460                 goto out_ioremap_fail;
2461         }
2462 
2463         pdata->dev = dev;
2464         pdata->msg_enable = ((1 << debug) - 1);
2465 
2466         platform_set_drvdata(pdev, dev);
2467 
2468         retval = smsc911x_request_resources(pdev);
2469         if (retval)
2470                 goto out_request_resources_fail;
2471 
2472         retval = smsc911x_enable_resources(pdev);
2473         if (retval)
2474                 goto out_enable_resources_fail;
2475 
2476         if (pdata->ioaddr == NULL) {
2477                 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2478                 retval = -ENOMEM;
2479                 goto out_disable_resources;
2480         }
2481 
2482         retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
2483         if (retval && config) {
2484                 /* copy config parameters across to pdata */
2485                 memcpy(&pdata->config, config, sizeof(pdata->config));
2486                 retval = 0;
2487         }
2488 
2489         if (retval) {
2490                 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2491                 goto out_disable_resources;
2492         }
2493 
2494         /* assume standard, non-shifted, access to HW registers */
2495         pdata->ops = &standard_smsc911x_ops;
2496         /* apply the right access if shifting is needed */
2497         if (pdata->config.shift)
2498                 pdata->ops = &shifted_smsc911x_ops;
2499 
2500         pm_runtime_enable(&pdev->dev);
2501         pm_runtime_get_sync(&pdev->dev);
2502 
2503         retval = smsc911x_init(dev);
2504         if (retval < 0)
2505                 goto out_init_fail;
2506 
2507         netif_carrier_off(dev);
2508 
2509         retval = smsc911x_mii_init(pdev, dev);
2510         if (retval) {
2511                 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2512                 goto out_init_fail;
2513         }
2514 
2515         retval = register_netdev(dev);
2516         if (retval) {
2517                 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2518                 goto out_init_fail;
2519         } else {
2520                 SMSC_TRACE(pdata, probe,
2521                            "Network interface: \"%s\"", dev->name);
2522         }
2523 
2524         spin_lock_irq(&pdata->mac_lock);
2525 
2526         /* Check if mac address has been specified when bringing interface up */
2527         if (is_valid_ether_addr(dev->dev_addr)) {
2528                 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2529                 SMSC_TRACE(pdata, probe,
2530                            "MAC Address is specified by configuration");
2531         } else if (is_valid_ether_addr(pdata->config.mac)) {
2532                 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2533                 SMSC_TRACE(pdata, probe,
2534                            "MAC Address specified by platform data");
2535         } else {
2536                 /* Try reading mac address from device. if EEPROM is present
2537                  * it will already have been set */
2538                 smsc_get_mac(dev);
2539 
2540                 if (is_valid_ether_addr(dev->dev_addr)) {
2541                         /* eeprom values are valid  so use them */
2542                         SMSC_TRACE(pdata, probe,
2543                                    "Mac Address is read from LAN911x EEPROM");
2544                 } else {
2545                         /* eeprom values are invalid, generate random MAC */
2546                         eth_hw_addr_random(dev);
2547                         smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2548                         SMSC_TRACE(pdata, probe,
2549                                    "MAC Address is set to eth_random_addr");
2550                 }
2551         }
2552 
2553         spin_unlock_irq(&pdata->mac_lock);
2554 
2555         netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2556 
2557         return 0;
2558 
2559 out_init_fail:
2560         pm_runtime_put(&pdev->dev);
2561         pm_runtime_disable(&pdev->dev);
2562 out_disable_resources:
2563         (void)smsc911x_disable_resources(pdev);
2564 out_enable_resources_fail:
2565         smsc911x_free_resources(pdev);
2566 out_request_resources_fail:
2567         iounmap(pdata->ioaddr);
2568 out_ioremap_fail:
2569         free_netdev(dev);
2570 out_release_io_1:
2571         release_mem_region(res->start, resource_size(res));
2572 out_0:
2573         return retval;
2574 }
2575 
2576 #ifdef CONFIG_PM
2577 /* This implementation assumes the devices remains powered on its VDDVARIO
2578  * pins during suspend. */
2579 
2580 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2581 
2582 static int smsc911x_suspend(struct device *dev)
2583 {
2584         struct net_device *ndev = dev_get_drvdata(dev);
2585         struct smsc911x_data *pdata = netdev_priv(ndev);
2586 
2587         if (netif_running(ndev)) {
2588                 netif_stop_queue(ndev);
2589                 netif_device_detach(ndev);
2590         }
2591 
2592         /* enable wake on LAN, energy detection and the external PME
2593          * signal. */
2594         smsc911x_reg_write(pdata, PMT_CTRL,
2595                 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2596                 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2597 
2598         pm_runtime_disable(dev);
2599         pm_runtime_set_suspended(dev);
2600 
2601         return 0;
2602 }
2603 
2604 static int smsc911x_resume(struct device *dev)
2605 {
2606         struct net_device *ndev = dev_get_drvdata(dev);
2607         struct smsc911x_data *pdata = netdev_priv(ndev);
2608         unsigned int to = 100;
2609 
2610         pm_runtime_enable(dev);
2611         pm_runtime_resume(dev);
2612 
2613         /* Note 3.11 from the datasheet:
2614          *      "When the LAN9220 is in a power saving state, a write of any
2615          *       data to the BYTE_TEST register will wake-up the device."
2616          */
2617         smsc911x_reg_write(pdata, BYTE_TEST, 0);
2618 
2619         /* poll the READY bit in PMT_CTRL. Any other access to the device is
2620          * forbidden while this bit isn't set. Try for 100ms and return -EIO
2621          * if it failed. */
2622         while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2623                 udelay(1000);
2624 
2625         if (to == 0)
2626                 return -EIO;
2627 
2628         if (netif_running(ndev)) {
2629                 netif_device_attach(ndev);
2630                 netif_start_queue(ndev);
2631         }
2632 
2633         return 0;
2634 }
2635 
2636 static const struct dev_pm_ops smsc911x_pm_ops = {
2637         .suspend        = smsc911x_suspend,
2638         .resume         = smsc911x_resume,
2639 };
2640 
2641 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2642 
2643 #else
2644 #define SMSC911X_PM_OPS NULL
2645 #endif
2646 
2647 #ifdef CONFIG_OF
2648 static const struct of_device_id smsc911x_dt_ids[] = {
2649         { .compatible = "smsc,lan9115", },
2650         { /* sentinel */ }
2651 };
2652 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2653 #endif
2654 
2655 static const struct acpi_device_id smsc911x_acpi_match[] = {
2656         { "ARMH9118", 0 },
2657         { }
2658 };
2659 MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
2660 
2661 static struct platform_driver smsc911x_driver = {
2662         .probe = smsc911x_drv_probe,
2663         .remove = smsc911x_drv_remove,
2664         .driver = {
2665                 .name   = SMSC_CHIPNAME,
2666                 .pm     = SMSC911X_PM_OPS,
2667                 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2668                 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
2669         },
2670 };
2671 
2672 /* Entry point for loading the module */
2673 static int __init smsc911x_init_module(void)
2674 {
2675         SMSC_INITIALIZE();
2676         return platform_driver_register(&smsc911x_driver);
2677 }
2678 
2679 /* entry point for unloading the module */
2680 static void __exit smsc911x_cleanup_module(void)
2681 {
2682         platform_driver_unregister(&smsc911x_driver);
2683 }
2684 
2685 module_init(smsc911x_init_module);
2686 module_exit(smsc911x_cleanup_module);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/smsc/smsc911x.c

DEFINITIONS
