git.oblomov.eu Git - linux-2.6/blob - drivers/net/smc911x.c

   1 /*
   2  * smc911x.c
   3  * This is a driver for SMSC's LAN911{5,6,7,8} single-chip Ethernet devices.
   4  *
   5  * Copyright (C) 2005 Sensoria Corp
   6  *         Derived from the unified SMC91x driver by Nicolas Pitre
   7  *         and the smsc911x.c reference driver by SMSC
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * Arguments:
  24  *       watchdog  = TX watchdog timeout
  25  *       tx_fifo_kb = Size of TX FIFO in KB
  26  *
  27  * History:
  28  *        04/16/05      Dustin McIntire          Initial version
  29  */
  30 static const char version[] =
  31          "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
  32
  33 /* Debugging options */
  34 #define ENABLE_SMC_DEBUG_RX             0
  35 #define ENABLE_SMC_DEBUG_TX             0
  36 #define ENABLE_SMC_DEBUG_DMA            0
  37 #define ENABLE_SMC_DEBUG_PKTS           0
  38 #define ENABLE_SMC_DEBUG_MISC           0
  39 #define ENABLE_SMC_DEBUG_FUNC           0
  40
  41 #define SMC_DEBUG_RX            ((ENABLE_SMC_DEBUG_RX   ? 1 : 0) << 0)
  42 #define SMC_DEBUG_TX            ((ENABLE_SMC_DEBUG_TX   ? 1 : 0) << 1)
  43 #define SMC_DEBUG_DMA           ((ENABLE_SMC_DEBUG_DMA  ? 1 : 0) << 2)
  44 #define SMC_DEBUG_PKTS          ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
  45 #define SMC_DEBUG_MISC          ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
  46 #define SMC_DEBUG_FUNC          ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
  47
  48 #ifndef SMC_DEBUG
  49 #define SMC_DEBUG        ( SMC_DEBUG_RX   | \
  50                            SMC_DEBUG_TX   | \
  51                            SMC_DEBUG_DMA  | \
  52                            SMC_DEBUG_PKTS | \
  53                            SMC_DEBUG_MISC | \
  54                            SMC_DEBUG_FUNC   \
  55                          )
  56 #endif
  57
  58 #include <linux/init.h>
  59 #include <linux/module.h>
  60 #include <linux/kernel.h>
  61 #include <linux/sched.h>
  62 #include <linux/slab.h>
  63 #include <linux/delay.h>
  64 #include <linux/interrupt.h>
  65 #include <linux/errno.h>
  66 #include <linux/ioport.h>
  67 #include <linux/crc32.h>
  68 #include <linux/device.h>
  69 #include <linux/platform_device.h>
  70 #include <linux/spinlock.h>
  71 #include <linux/ethtool.h>
  72 #include <linux/mii.h>
  73 #include <linux/workqueue.h>
  74
  75 #include <linux/netdevice.h>
  76 #include <linux/etherdevice.h>
  77 #include <linux/skbuff.h>
  78
  79 #include <asm/io.h>
  80
  81 #include "smc911x.h"
  82
  83 /*
  84  * Transmit timeout, default 5 seconds.
  85  */
  86 static int watchdog = 5000;
  87 module_param(watchdog, int, 0400);
  88 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
  89
  90 static int tx_fifo_kb=8;
  91 module_param(tx_fifo_kb, int, 0400);
  92 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
  93
  94 MODULE_LICENSE("GPL");
  95
  96 /*
  97  * The internal workings of the driver.  If you are changing anything
  98  * here with the SMC stuff, you should have the datasheet and know
  99  * what you are doing.
 100  */
 101 #define CARDNAME "smc911x"
 102
 103 /*
 104  * Use power-down feature of the chip
 105  */
 106 #define POWER_DOWN               1
 107
 108
 109 /* store this information for the driver.. */
 110 struct smc911x_local {
 111         /*
 112          * If I have to wait until the DMA is finished and ready to reload a
 113          * packet, I will store the skbuff here. Then, the DMA will send it
 114          * out and free it.
 115          */
 116         struct sk_buff *pending_tx_skb;
 117
 118         /* version/revision of the SMC911x chip */
 119         u16 version;
 120         u16 revision;
 121
 122         /* FIFO sizes */
 123         int tx_fifo_kb;
 124         int tx_fifo_size;
 125         int rx_fifo_size;
 126         int afc_cfg;
 127
 128         /* Contains the current active receive/phy mode */
 129         int ctl_rfduplx;
 130         int ctl_rspeed;
 131
 132         u32 msg_enable;
 133         u32 phy_type;
 134         struct mii_if_info mii;
 135
 136         /* work queue */
 137         struct work_struct phy_configure;
 138         int work_pending;
 139
 140         int tx_throttle;
 141         spinlock_t lock;
 142
 143         struct net_device *netdev;
 144
 145 #ifdef SMC_USE_DMA
 146         /* DMA needs the physical address of the chip */
 147         u_long physaddr;
 148         int rxdma;
 149         int txdma;
 150         int rxdma_active;
 151         int txdma_active;
 152         struct sk_buff *current_rx_skb;
 153         struct sk_buff *current_tx_skb;
 154         struct device *dev;
 155 #endif
 156 };
 157
 158 #if SMC_DEBUG > 0
 159 #define DBG(n, args...)                          \
 160         do {                                     \
 161                 if (SMC_DEBUG & (n))             \
 162                         printk(args);            \
 163         } while (0)
 164
 165 #define PRINTK(args...)   printk(args)
 166 #else
 167 #define DBG(n, args...)   do { } while (0)
 168 #define PRINTK(args...)   printk(KERN_DEBUG args)
 169 #endif
 170
 171 #if SMC_DEBUG_PKTS > 0
 172 static void PRINT_PKT(u_char *buf, int length)
 173 {
 174         int i;
 175         int remainder;
 176         int lines;
 177
 178         lines = length / 16;
 179         remainder = length % 16;
 180
 181         for (i = 0; i < lines ; i ++) {
 182                 int cur;
 183                 for (cur = 0; cur < 8; cur++) {
 184                         u_char a, b;
 185                         a = *buf++;
 186                         b = *buf++;
 187                         printk("%02x%02x ", a, b);
 188                 }
 189                 printk("\n");
 190         }
 191         for (i = 0; i < remainder/2 ; i++) {
 192                 u_char a, b;
 193                 a = *buf++;
 194                 b = *buf++;
 195                 printk("%02x%02x ", a, b);
 196         }
 197         printk("\n");
 198 }
 199 #else
 200 #define PRINT_PKT(x...)  do { } while (0)
 201 #endif
 202
 203
 204 /* this enables an interrupt in the interrupt mask register */
 205 #define SMC_ENABLE_INT(x) do {                          \
 206         unsigned int  __mask;                           \
 207         unsigned long __flags;                          \
 208         spin_lock_irqsave(&lp->lock, __flags);          \
 209         __mask = SMC_GET_INT_EN();                      \
 210         __mask |= (x);                                  \
 211         SMC_SET_INT_EN(__mask);                         \
 212         spin_unlock_irqrestore(&lp->lock, __flags);     \
 213 } while (0)
 214
 215 /* this disables an interrupt from the interrupt mask register */
 216 #define SMC_DISABLE_INT(x) do {                         \
 217         unsigned int  __mask;                           \
 218         unsigned long __flags;                          \
 219         spin_lock_irqsave(&lp->lock, __flags);          \
 220         __mask = SMC_GET_INT_EN();                      \
 221         __mask &= ~(x);                                 \
 222         SMC_SET_INT_EN(__mask);                         \
 223         spin_unlock_irqrestore(&lp->lock, __flags);     \
 224 } while (0)
 225
 226 /*
 227  * this does a soft reset on the device
 228  */
 229 static void smc911x_reset(struct net_device *dev)
 230 {
 231         unsigned long ioaddr = dev->base_addr;
 232         struct smc911x_local *lp = netdev_priv(dev);
 233         unsigned int reg, timeout=0, resets=1;
 234         unsigned long flags;
 235
 236         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
 237
 238         /*       Take out of PM setting first */
 239         if ((SMC_GET_PMT_CTRL() & PMT_CTRL_READY_) == 0) {
 240                 /* Write to the bytetest will take out of powerdown */
 241                 SMC_SET_BYTE_TEST(0);
 242                 timeout=10;
 243                 do {
 244                         udelay(10);
 245                         reg = SMC_GET_PMT_CTRL() & PMT_CTRL_READY_;
 246                 } while ( timeout-- && !reg);
 247                 if (timeout == 0) {
 248                         PRINTK("%s: smc911x_reset timeout waiting for PM restore\n", dev->name);
 249                         return;
 250                 }
 251         }
 252
 253         /* Disable all interrupts */
 254         spin_lock_irqsave(&lp->lock, flags);
 255         SMC_SET_INT_EN(0);
 256         spin_unlock_irqrestore(&lp->lock, flags);
 257
 258         while (resets--) {
 259                 SMC_SET_HW_CFG(HW_CFG_SRST_);
 260                 timeout=10;
 261                 do {
 262                         udelay(10);
 263                         reg = SMC_GET_HW_CFG();
 264                         /* If chip indicates reset timeout then try again */
 265                         if (reg & HW_CFG_SRST_TO_) {
 266                                 PRINTK("%s: chip reset timeout, retrying...\n", dev->name);
 267                                 resets++;
 268                                 break;
 269                         }
 270                 } while ( timeout-- && (reg & HW_CFG_SRST_));
 271         }
 272         if (timeout == 0) {
 273                 PRINTK("%s: smc911x_reset timeout waiting for reset\n", dev->name);
 274                 return;
 275         }
 276
 277         /* make sure EEPROM has finished loading before setting GPIO_CFG */
 278         timeout=1000;
 279         while ( timeout-- && (SMC_GET_E2P_CMD() & E2P_CMD_EPC_BUSY_)) {
 280                 udelay(10);
 281         }
 282         if (timeout == 0){
 283                 PRINTK("%s: smc911x_reset timeout waiting for EEPROM busy\n", dev->name);
 284                 return;
 285         }
 286
 287         /* Initialize interrupts */
 288         SMC_SET_INT_EN(0);
 289         SMC_ACK_INT(-1);
 290
 291         /* Reset the FIFO level and flow control settings */
 292         SMC_SET_HW_CFG((lp->tx_fifo_kb & 0xF) << 16);
 293 //TODO: Figure out what appropriate pause time is
 294         SMC_SET_FLOW(FLOW_FCPT_ | FLOW_FCEN_);
 295         SMC_SET_AFC_CFG(lp->afc_cfg);
 296
 297
 298         /* Set to LED outputs */
 299         SMC_SET_GPIO_CFG(0x70070000);
 300
 301         /*
 302          * Deassert IRQ for 1*10us for edge type interrupts
 303          * and drive IRQ pin push-pull
 304          */
 305         SMC_SET_IRQ_CFG( (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_ );
 306
 307         /* clear anything saved */
 308         if (lp->pending_tx_skb != NULL) {
 309                 dev_kfree_skb (lp->pending_tx_skb);
 310                 lp->pending_tx_skb = NULL;
 311                 dev->stats.tx_errors++;
 312                 dev->stats.tx_aborted_errors++;
 313         }
 314 }
 315
 316 /*
 317  * Enable Interrupts, Receive, and Transmit
 318  */
 319 static void smc911x_enable(struct net_device *dev)
 320 {
 321         unsigned long ioaddr = dev->base_addr;
 322         struct smc911x_local *lp = netdev_priv(dev);
 323         unsigned mask, cfg, cr;
 324         unsigned long flags;
 325
 326         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
 327
 328         SMC_SET_MAC_ADDR(dev->dev_addr);
 329
 330         /* Enable TX */
 331         cfg = SMC_GET_HW_CFG();
 332         cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
 333         cfg |= HW_CFG_SF_;
 334         SMC_SET_HW_CFG(cfg);
 335         SMC_SET_FIFO_TDA(0xFF);
 336         /* Update TX stats on every 64 packets received or every 1 sec */
 337         SMC_SET_FIFO_TSL(64);
 338         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
 339
 340         spin_lock_irqsave(&lp->lock, flags);
 341         SMC_GET_MAC_CR(cr);
 342         cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
 343         SMC_SET_MAC_CR(cr);
 344         SMC_SET_TX_CFG(TX_CFG_TX_ON_);
 345         spin_unlock_irqrestore(&lp->lock, flags);
 346
 347         /* Add 2 byte padding to start of packets */
 348         SMC_SET_RX_CFG((2<<8) & RX_CFG_RXDOFF_);
 349
 350         /* Turn on receiver and enable RX */
 351         if (cr & MAC_CR_RXEN_)
 352                 DBG(SMC_DEBUG_RX, "%s: Receiver already enabled\n", dev->name);
 353
 354         spin_lock_irqsave(&lp->lock, flags);
 355         SMC_SET_MAC_CR( cr | MAC_CR_RXEN_ );
 356         spin_unlock_irqrestore(&lp->lock, flags);
 357
 358         /* Interrupt on every received packet */
 359         SMC_SET_FIFO_RSA(0x01);
 360         SMC_SET_FIFO_RSL(0x00);
 361
 362         /* now, enable interrupts */
 363         mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
 364                 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
 365                 INT_EN_PHY_INT_EN_;
 366         if (IS_REV_A(lp->revision))
 367                 mask|=INT_EN_RDFL_EN_;
 368         else {
 369                 mask|=INT_EN_RDFO_EN_;
 370         }
 371         SMC_ENABLE_INT(mask);
 372 }
 373
 374 /*
 375  * this puts the device in an inactive state
 376  */
 377 static void smc911x_shutdown(struct net_device *dev)
 378 {
 379         unsigned long ioaddr = dev->base_addr;
 380         struct smc911x_local *lp = netdev_priv(dev);
 381         unsigned cr;
 382         unsigned long flags;
 383
 384         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", CARDNAME, __FUNCTION__);
 385
 386         /* Disable IRQ's */
 387         SMC_SET_INT_EN(0);
 388
 389         /* Turn of Rx and TX */
 390         spin_lock_irqsave(&lp->lock, flags);
 391         SMC_GET_MAC_CR(cr);
 392         cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
 393         SMC_SET_MAC_CR(cr);
 394         SMC_SET_TX_CFG(TX_CFG_STOP_TX_);
 395         spin_unlock_irqrestore(&lp->lock, flags);
 396 }
 397
 398 static inline void smc911x_drop_pkt(struct net_device *dev)
 399 {
 400         unsigned long ioaddr = dev->base_addr;
 401         unsigned int fifo_count, timeout, reg;
 402
 403         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n", CARDNAME, __FUNCTION__);
 404         fifo_count = SMC_GET_RX_FIFO_INF() & 0xFFFF;
 405         if (fifo_count <= 4) {
 406                 /* Manually dump the packet data */
 407                 while (fifo_count--)
 408                         SMC_GET_RX_FIFO();
 409         } else   {
 410                 /* Fast forward through the bad packet */
 411                 SMC_SET_RX_DP_CTRL(RX_DP_CTRL_FFWD_BUSY_);
 412                 timeout=50;
 413                 do {
 414                         udelay(10);
 415                         reg = SMC_GET_RX_DP_CTRL() & RX_DP_CTRL_FFWD_BUSY_;
 416                 } while ( timeout-- && reg);
 417                 if (timeout == 0) {
 418                         PRINTK("%s: timeout waiting for RX fast forward\n", dev->name);
 419                 }
 420         }
 421 }
 422
 423 /*
 424  * This is the procedure to handle the receipt of a packet.
 425  * It should be called after checking for packet presence in
 426  * the RX status FIFO.   It must be called with the spin lock
 427  * already held.
 428  */
 429 static inline void       smc911x_rcv(struct net_device *dev)
 430 {
 431         struct smc911x_local *lp = netdev_priv(dev);
 432         unsigned long ioaddr = dev->base_addr;
 433         unsigned int pkt_len, status;
 434         struct sk_buff *skb;
 435         unsigned char *data;
 436
 437         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, "%s: --> %s\n",
 438                 dev->name, __FUNCTION__);
 439         status = SMC_GET_RX_STS_FIFO();
 440         DBG(SMC_DEBUG_RX, "%s: Rx pkt len %d status 0x%08x \n",
 441                 dev->name, (status & 0x3fff0000) >> 16, status & 0xc000ffff);
 442         pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
 443         if (status & RX_STS_ES_) {
 444                 /* Deal with a bad packet */
 445                 dev->stats.rx_errors++;
 446                 if (status & RX_STS_CRC_ERR_)
 447                         dev->stats.rx_crc_errors++;
 448                 else {
 449                         if (status & RX_STS_LEN_ERR_)
 450                                 dev->stats.rx_length_errors++;
 451                         if (status & RX_STS_MCAST_)
 452                                 dev->stats.multicast++;
 453                 }
 454                 /* Remove the bad packet data from the RX FIFO */
 455                 smc911x_drop_pkt(dev);
 456         } else {
 457                 /* Receive a valid packet */
 458                 /* Alloc a buffer with extra room for DMA alignment */
 459                 skb=dev_alloc_skb(pkt_len+32);
 460                 if (unlikely(skb == NULL)) {
 461                         PRINTK( "%s: Low memory, rcvd packet dropped.\n",
 462                                 dev->name);
 463                         dev->stats.rx_dropped++;
 464                         smc911x_drop_pkt(dev);
 465                         return;
 466                 }
 467                 /* Align IP header to 32 bits
 468                  * Note that the device is configured to add a 2
 469                  * byte padding to the packet start, so we really
 470                  * want to write to the orignal data pointer */
 471                 data = skb->data;
 472                 skb_reserve(skb, 2);
 473                 skb_put(skb,pkt_len-4);
 474 #ifdef SMC_USE_DMA
 475                 {
 476                 unsigned int fifo;
 477                 /* Lower the FIFO threshold if possible */
 478                 fifo = SMC_GET_FIFO_INT();
 479                 if (fifo & 0xFF) fifo--;
 480                 DBG(SMC_DEBUG_RX, "%s: Setting RX stat FIFO threshold to %d\n",
 481                         dev->name, fifo & 0xff);
 482                 SMC_SET_FIFO_INT(fifo);
 483                 /* Setup RX DMA */
 484                 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
 485                 lp->rxdma_active = 1;
 486                 lp->current_rx_skb = skb;
 487                 SMC_PULL_DATA(data, (pkt_len+2+15) & ~15);
 488                 /* Packet processing deferred to DMA RX interrupt */
 489                 }
 490 #else
 491                 SMC_SET_RX_CFG(RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
 492                 SMC_PULL_DATA(data, pkt_len+2+3);
 493
 494                 DBG(SMC_DEBUG_PKTS, "%s: Received packet\n", dev->name);
 495                 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
 496                 dev->last_rx = jiffies;
 497                 skb->protocol = eth_type_trans(skb, dev);
 498                 netif_rx(skb);
 499                 dev->stats.rx_packets++;
 500                 dev->stats.rx_bytes += pkt_len-4;
 501 #endif
 502         }
 503 }
 504
 505 /*
 506  * This is called to actually send a packet to the chip.
 507  */
 508 static void smc911x_hardware_send_pkt(struct net_device *dev)
 509 {
 510         struct smc911x_local *lp = netdev_priv(dev);
 511         unsigned long ioaddr = dev->base_addr;
 512         struct sk_buff *skb;
 513         unsigned int cmdA, cmdB, len;
 514         unsigned char *buf;
 515         unsigned long flags;
 516
 517         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n", dev->name, __FUNCTION__);
 518         BUG_ON(lp->pending_tx_skb == NULL);
 519
 520         skb = lp->pending_tx_skb;
 521         lp->pending_tx_skb = NULL;
 522
 523         /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
 524         /* cmdB {31:16] pkt tag [10:0] length */
 525 #ifdef SMC_USE_DMA
 526         /* 16 byte buffer alignment mode */
 527         buf = (char*)((u32)(skb->data) & ~0xF);
 528         len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
 529         cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
 530                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
 531                         skb->len;
 532 #else
 533         buf = (char*)((u32)skb->data & ~0x3);
 534         len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
 535         cmdA = (((u32)skb->data & 0x3) << 16) |
 536                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
 537                         skb->len;
 538 #endif
 539         /* tag is packet length so we can use this in stats update later */
 540         cmdB = (skb->len  << 16) | (skb->len & 0x7FF);
 541
 542         DBG(SMC_DEBUG_TX, "%s: TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
 543                  dev->name, len, len, buf, cmdA, cmdB);
 544         SMC_SET_TX_FIFO(cmdA);
 545         SMC_SET_TX_FIFO(cmdB);
 546
 547         DBG(SMC_DEBUG_PKTS, "%s: Transmitted packet\n", dev->name);
 548         PRINT_PKT(buf, len <= 64 ? len : 64);
 549
 550         /* Send pkt via PIO or DMA */
 551 #ifdef SMC_USE_DMA
 552         lp->current_tx_skb = skb;
 553         SMC_PUSH_DATA(buf, len);
 554         /* DMA complete IRQ will free buffer and set jiffies */
 555 #else
 556         SMC_PUSH_DATA(buf, len);
 557         dev->trans_start = jiffies;
 558         dev_kfree_skb(skb);
 559 #endif
 560         spin_lock_irqsave(&lp->lock, flags);
 561         if (!lp->tx_throttle) {
 562                 netif_wake_queue(dev);
 563         }
 564         spin_unlock_irqrestore(&lp->lock, flags);
 565         SMC_ENABLE_INT(INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
 566 }
 567
 568 /*
 569  * Since I am not sure if I will have enough room in the chip's ram
 570  * to store the packet, I call this routine which either sends it
 571  * now, or set the card to generates an interrupt when ready
 572  * for the packet.
 573  */
 574 static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 575 {
 576         struct smc911x_local *lp = netdev_priv(dev);
 577         unsigned long ioaddr = dev->base_addr;
 578         unsigned int free;
 579         unsigned long flags;
 580
 581         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
 582                 dev->name, __FUNCTION__);
 583
 584         BUG_ON(lp->pending_tx_skb != NULL);
 585
 586         free = SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TDFREE_;
 587         DBG(SMC_DEBUG_TX, "%s: TX free space %d\n", dev->name, free);
 588
 589         /* Turn off the flow when running out of space in FIFO */
 590         if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
 591                 DBG(SMC_DEBUG_TX, "%s: Disabling data flow due to low FIFO space (%d)\n",
 592                         dev->name, free);
 593                 spin_lock_irqsave(&lp->lock, flags);
 594                 /* Reenable when at least 1 packet of size MTU present */
 595                 SMC_SET_FIFO_TDA((SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
 596                 lp->tx_throttle = 1;
 597                 netif_stop_queue(dev);
 598                 spin_unlock_irqrestore(&lp->lock, flags);
 599         }
 600
 601         /* Drop packets when we run out of space in TX FIFO
 602          * Account for overhead required for:
 603          *
 604          *        Tx command words                       8 bytes
 605          *        Start offset                           15 bytes
 606          *        End padding                            15 bytes
 607          */
 608         if (unlikely(free < (skb->len + 8 + 15 + 15))) {
 609                 printk("%s: No Tx free space %d < %d\n",
 610                         dev->name, free, skb->len);
 611                 lp->pending_tx_skb = NULL;
 612                 dev->stats.tx_errors++;
 613                 dev->stats.tx_dropped++;
 614                 dev_kfree_skb(skb);
 615                 return 0;
 616         }
 617
 618 #ifdef SMC_USE_DMA
 619         {
 620                 /* If the DMA is already running then defer this packet Tx until
 621                  * the DMA IRQ starts it
 622                  */
 623                 spin_lock_irqsave(&lp->lock, flags);
 624                 if (lp->txdma_active) {
 625                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Tx DMA running, deferring packet\n", dev->name);
 626                         lp->pending_tx_skb = skb;
 627                         netif_stop_queue(dev);
 628                         spin_unlock_irqrestore(&lp->lock, flags);
 629                         return 0;
 630                 } else {
 631                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: Activating Tx DMA\n", dev->name);
 632                         lp->txdma_active = 1;
 633                 }
 634                 spin_unlock_irqrestore(&lp->lock, flags);
 635         }
 636 #endif
 637         lp->pending_tx_skb = skb;
 638         smc911x_hardware_send_pkt(dev);
 639
 640         return 0;
 641 }
 642
 643 /*
 644  * This handles a TX status interrupt, which is only called when:
 645  * - a TX error occurred, or
 646  * - TX of a packet completed.
 647  */
 648 static void smc911x_tx(struct net_device *dev)
 649 {
 650         unsigned long ioaddr = dev->base_addr;
 651         struct smc911x_local *lp = netdev_priv(dev);
 652         unsigned int tx_status;
 653
 654         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, "%s: --> %s\n",
 655                 dev->name, __FUNCTION__);
 656
 657         /* Collect the TX status */
 658         while (((SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
 659                 DBG(SMC_DEBUG_TX, "%s: Tx stat FIFO used 0x%04x\n",
 660                         dev->name,
 661                         (SMC_GET_TX_FIFO_INF() & TX_FIFO_INF_TSUSED_) >> 16);
 662                 tx_status = SMC_GET_TX_STS_FIFO();
 663                 dev->stats.tx_packets++;
 664                 dev->stats.tx_bytes+=tx_status>>16;
 665                 DBG(SMC_DEBUG_TX, "%s: Tx FIFO tag 0x%04x status 0x%04x\n",
 666                         dev->name, (tx_status & 0xffff0000) >> 16,
 667                         tx_status & 0x0000ffff);
 668                 /* count Tx errors, but ignore lost carrier errors when in
 669                  * full-duplex mode */
 670                 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
 671                     !(tx_status & 0x00000306))) {
 672                         dev->stats.tx_errors++;
 673                 }
 674                 if (tx_status & TX_STS_MANY_COLL_) {
 675                         dev->stats.collisions+=16;
 676                         dev->stats.tx_aborted_errors++;
 677                 } else {
 678                         dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
 679                 }
 680                 /* carrier error only has meaning for half-duplex communication */
 681                 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
 682                     !lp->ctl_rfduplx) {
 683                         dev->stats.tx_carrier_errors++;
 684                 }
 685                 if (tx_status & TX_STS_LATE_COLL_) {
 686                         dev->stats.collisions++;
 687                         dev->stats.tx_aborted_errors++;
 688                 }
 689         }
 690 }
 691
 692
 693 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
 694 /*
 695  * Reads a register from the MII Management serial interface
 696  */
 697
 698 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
 699 {
 700         unsigned long ioaddr = dev->base_addr;
 701         unsigned int phydata;
 702
 703         SMC_GET_MII(phyreg, phyaddr, phydata);
 704
 705         DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
 706                 __FUNCTION__, phyaddr, phyreg, phydata);
 707         return phydata;
 708 }
 709
 710
 711 /*
 712  * Writes a register to the MII Management serial interface
 713  */
 714 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
 715                         int phydata)
 716 {
 717         unsigned long ioaddr = dev->base_addr;
 718
 719         DBG(SMC_DEBUG_MISC, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
 720                 __FUNCTION__, phyaddr, phyreg, phydata);
 721
 722         SMC_SET_MII(phyreg, phyaddr, phydata);
 723 }
 724
 725 /*
 726  * Finds and reports the PHY address (115 and 117 have external
 727  * PHY interface 118 has internal only
 728  */
 729 static void smc911x_phy_detect(struct net_device *dev)
 730 {
 731         unsigned long ioaddr = dev->base_addr;
 732         struct smc911x_local *lp = netdev_priv(dev);
 733         int phyaddr;
 734         unsigned int cfg, id1, id2;
 735
 736         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
 737
 738         lp->phy_type = 0;
 739
 740         /*
 741          * Scan all 32 PHY addresses if necessary, starting at
 742          * PHY#1 to PHY#31, and then PHY#0 last.
 743          */
 744         switch(lp->version) {
 745                 case 0x115:
 746                 case 0x117:
 747                         cfg = SMC_GET_HW_CFG();
 748                         if (cfg & HW_CFG_EXT_PHY_DET_) {
 749                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
 750                                 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
 751                                 SMC_SET_HW_CFG(cfg);
 752                                 udelay(10); /* Wait for clocks to stop */
 753
 754                                 cfg |= HW_CFG_EXT_PHY_EN_;
 755                                 SMC_SET_HW_CFG(cfg);
 756                                 udelay(10); /* Wait for clocks to stop */
 757
 758                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
 759                                 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
 760                                 SMC_SET_HW_CFG(cfg);
 761                                 udelay(10); /* Wait for clocks to stop */
 762
 763                                 cfg |= HW_CFG_SMI_SEL_;
 764                                 SMC_SET_HW_CFG(cfg);
 765
 766                                 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
 767
 768                                         /* Read the PHY identifiers */
 769                                         SMC_GET_PHY_ID1(phyaddr & 31, id1);
 770                                         SMC_GET_PHY_ID2(phyaddr & 31, id2);
 771
 772                                         /* Make sure it is a valid identifier */
 773                                         if (id1 != 0x0000 && id1 != 0xffff &&
 774                                             id1 != 0x8000 && id2 != 0x0000 &&
 775                                             id2 != 0xffff && id2 != 0x8000) {
 776                                                 /* Save the PHY's address */
 777                                                 lp->mii.phy_id = phyaddr & 31;
 778                                                 lp->phy_type = id1 << 16 | id2;
 779                                                 break;
 780                                         }
 781                                 }
 782                         }
 783                 default:
 784                         /* Internal media only */
 785                         SMC_GET_PHY_ID1(1, id1);
 786                         SMC_GET_PHY_ID2(1, id2);
 787                         /* Save the PHY's address */
 788                         lp->mii.phy_id = 1;
 789                         lp->phy_type = id1 << 16 | id2;
 790         }
 791
 792         DBG(SMC_DEBUG_MISC, "%s: phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%d\n",
 793                 dev->name, id1, id2, lp->mii.phy_id);
 794 }
 795
 796 /*
 797  * Sets the PHY to a configuration as determined by the user.
 798  * Called with spin_lock held.
 799  */
 800 static int smc911x_phy_fixed(struct net_device *dev)
 801 {
 802         struct smc911x_local *lp = netdev_priv(dev);
 803         unsigned long ioaddr = dev->base_addr;
 804         int phyaddr = lp->mii.phy_id;
 805         int bmcr;
 806
 807         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
 808
 809         /* Enter Link Disable state */
 810         SMC_GET_PHY_BMCR(phyaddr, bmcr);
 811         bmcr |= BMCR_PDOWN;
 812         SMC_SET_PHY_BMCR(phyaddr, bmcr);
 813
 814         /*
 815          * Set our fixed capabilities
 816          * Disable auto-negotiation
 817          */
 818         bmcr &= ~BMCR_ANENABLE;
 819         if (lp->ctl_rfduplx)
 820                 bmcr |= BMCR_FULLDPLX;
 821
 822         if (lp->ctl_rspeed == 100)
 823                 bmcr |= BMCR_SPEED100;
 824
 825         /* Write our capabilities to the phy control register */
 826         SMC_SET_PHY_BMCR(phyaddr, bmcr);
 827
 828         /* Re-Configure the Receive/Phy Control register */
 829         bmcr &= ~BMCR_PDOWN;
 830         SMC_SET_PHY_BMCR(phyaddr, bmcr);
 831
 832         return 1;
 833 }
 834
 835 /*
 836  * smc911x_phy_reset - reset the phy
 837  * @dev: net device
 838  * @phy: phy address
 839  *
 840  * Issue a software reset for the specified PHY and
 841  * wait up to 100ms for the reset to complete.   We should
 842  * not access the PHY for 50ms after issuing the reset.
 843  *
 844  * The time to wait appears to be dependent on the PHY.
 845  *
 846  */
 847 static int smc911x_phy_reset(struct net_device *dev, int phy)
 848 {
 849         struct smc911x_local *lp = netdev_priv(dev);
 850         unsigned long ioaddr = dev->base_addr;
 851         int timeout;
 852         unsigned long flags;
 853         unsigned int reg;
 854
 855         DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
 856
 857         spin_lock_irqsave(&lp->lock, flags);
 858         reg = SMC_GET_PMT_CTRL();
 859         reg &= ~0xfffff030;
 860         reg |= PMT_CTRL_PHY_RST_;
 861         SMC_SET_PMT_CTRL(reg);
 862         spin_unlock_irqrestore(&lp->lock, flags);
 863         for (timeout = 2; timeout; timeout--) {
 864                 msleep(50);
 865                 spin_lock_irqsave(&lp->lock, flags);
 866                 reg = SMC_GET_PMT_CTRL();
 867                 spin_unlock_irqrestore(&lp->lock, flags);
 868                 if (!(reg & PMT_CTRL_PHY_RST_)) {
 869                         /* extra delay required because the phy may
 870                          * not be completed with its reset
 871                          * when PHY_BCR_RESET_ is cleared. 256us
 872                          * should suffice, but use 500us to be safe
 873                          */
 874                         udelay(500);
 875                 break;
 876                 }
 877         }
 878
 879         return reg & PMT_CTRL_PHY_RST_;
 880 }
 881
 882 /*
 883  * smc911x_phy_powerdown - powerdown phy
 884  * @dev: net device
 885  * @phy: phy address
 886  *
 887  * Power down the specified PHY
 888  */
 889 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
 890 {
 891         unsigned long ioaddr = dev->base_addr;
 892         unsigned int bmcr;
 893
 894         /* Enter Link Disable state */
 895         SMC_GET_PHY_BMCR(phy, bmcr);
 896         bmcr |= BMCR_PDOWN;
 897         SMC_SET_PHY_BMCR(phy, bmcr);
 898 }
 899
 900 /*
 901  * smc911x_phy_check_media - check the media status and adjust BMCR
 902  * @dev: net device
 903  * @init: set true for initialisation
 904  *
 905  * Select duplex mode depending on negotiation state.   This
 906  * also updates our carrier state.
 907  */
 908 static void smc911x_phy_check_media(struct net_device *dev, int init)
 909 {
 910         struct smc911x_local *lp = netdev_priv(dev);
 911         unsigned long ioaddr = dev->base_addr;
 912         int phyaddr = lp->mii.phy_id;
 913         unsigned int bmcr, cr;
 914
 915         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
 916
 917         if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
 918                 /* duplex state has changed */
 919                 SMC_GET_PHY_BMCR(phyaddr, bmcr);
 920                 SMC_GET_MAC_CR(cr);
 921                 if (lp->mii.full_duplex) {
 922                         DBG(SMC_DEBUG_MISC, "%s: Configuring for full-duplex mode\n", dev->name);
 923                         bmcr |= BMCR_FULLDPLX;
 924                         cr |= MAC_CR_RCVOWN_;
 925                 } else {
 926                         DBG(SMC_DEBUG_MISC, "%s: Configuring for half-duplex mode\n", dev->name);
 927                         bmcr &= ~BMCR_FULLDPLX;
 928                         cr &= ~MAC_CR_RCVOWN_;
 929                 }
 930                 SMC_SET_PHY_BMCR(phyaddr, bmcr);
 931                 SMC_SET_MAC_CR(cr);
 932         }
 933 }
 934
 935 /*
 936  * Configures the specified PHY through the MII management interface
 937  * using Autonegotiation.
 938  * Calls smc911x_phy_fixed() if the user has requested a certain config.
 939  * If RPC ANEG bit is set, the media selection is dependent purely on
 940  * the selection by the MII (either in the MII BMCR reg or the result
 941  * of autonegotiation.)  If the RPC ANEG bit is cleared, the selection
 942  * is controlled by the RPC SPEED and RPC DPLX bits.
 943  */
 944 static void smc911x_phy_configure(struct work_struct *work)
 945 {
 946         struct smc911x_local *lp = container_of(work, struct smc911x_local,
 947                                                 phy_configure);
 948         struct net_device *dev = lp->netdev;
 949         unsigned long ioaddr = dev->base_addr;
 950         int phyaddr = lp->mii.phy_id;
 951         int my_phy_caps; /* My PHY capabilities */
 952         int my_ad_caps; /* My Advertised capabilities */
 953         int status;
 954         unsigned long flags;
 955
 956         DBG(SMC_DEBUG_FUNC, "%s: --> %s()\n", dev->name, __FUNCTION__);
 957
 958         /*
 959          * We should not be called if phy_type is zero.
 960          */
 961         if (lp->phy_type == 0)
 962                  goto smc911x_phy_configure_exit_nolock;
 963
 964         if (smc911x_phy_reset(dev, phyaddr)) {
 965                 printk("%s: PHY reset timed out\n", dev->name);
 966                 goto smc911x_phy_configure_exit_nolock;
 967         }
 968         spin_lock_irqsave(&lp->lock, flags);
 969
 970         /*
 971          * Enable PHY Interrupts (for register 18)
 972          * Interrupts listed here are enabled
 973          */
 974         SMC_SET_PHY_INT_MASK(phyaddr, PHY_INT_MASK_ENERGY_ON_ |
 975                  PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
 976                  PHY_INT_MASK_LINK_DOWN_);
 977
 978         /* If the user requested no auto neg, then go set his request */
 979         if (lp->mii.force_media) {
 980                 smc911x_phy_fixed(dev);
 981                 goto smc911x_phy_configure_exit;
 982         }
 983
 984         /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
 985         SMC_GET_PHY_BMSR(phyaddr, my_phy_caps);
 986         if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
 987                 printk(KERN_INFO "Auto negotiation NOT supported\n");
 988                 smc911x_phy_fixed(dev);
 989                 goto smc911x_phy_configure_exit;
 990         }
 991
 992         /* CSMA capable w/ both pauses */
 993         my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 994
 995         if (my_phy_caps & BMSR_100BASE4)
 996                 my_ad_caps |= ADVERTISE_100BASE4;
 997         if (my_phy_caps & BMSR_100FULL)
 998                 my_ad_caps |= ADVERTISE_100FULL;
 999         if (my_phy_caps & BMSR_100HALF)
1000                 my_ad_caps |= ADVERTISE_100HALF;
1001         if (my_phy_caps & BMSR_10FULL)
1002                 my_ad_caps |= ADVERTISE_10FULL;
1003         if (my_phy_caps & BMSR_10HALF)
1004                 my_ad_caps |= ADVERTISE_10HALF;
1005
1006         /* Disable capabilities not selected by our user */
1007         if (lp->ctl_rspeed != 100)
1008                 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
1009
1010          if (!lp->ctl_rfduplx)
1011                 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
1012
1013         /* Update our Auto-Neg Advertisement Register */
1014         SMC_SET_PHY_MII_ADV(phyaddr, my_ad_caps);
1015         lp->mii.advertising = my_ad_caps;
1016
1017         /*
1018          * Read the register back.       Without this, it appears that when
1019          * auto-negotiation is restarted, sometimes it isn't ready and
1020          * the link does not come up.
1021          */
1022         udelay(10);
1023         SMC_GET_PHY_MII_ADV(phyaddr, status);
1024
1025         DBG(SMC_DEBUG_MISC, "%s: phy caps=0x%04x\n", dev->name, my_phy_caps);
1026         DBG(SMC_DEBUG_MISC, "%s: phy advertised caps=0x%04x\n", dev->name, my_ad_caps);
1027
1028         /* Restart auto-negotiation process in order to advertise my caps */
1029         SMC_SET_PHY_BMCR(phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
1030
1031         smc911x_phy_check_media(dev, 1);
1032
1033 smc911x_phy_configure_exit:
1034         spin_unlock_irqrestore(&lp->lock, flags);
1035 smc911x_phy_configure_exit_nolock:
1036         lp->work_pending = 0;
1037 }
1038
1039 /*
1040  * smc911x_phy_interrupt
1041  *
1042  * Purpose:  Handle interrupts relating to PHY register 18. This is
1043  *       called from the "hard" interrupt handler under our private spinlock.
1044  */
1045 static void smc911x_phy_interrupt(struct net_device *dev)
1046 {
1047         struct smc911x_local *lp = netdev_priv(dev);
1048         unsigned long ioaddr = dev->base_addr;
1049         int phyaddr = lp->mii.phy_id;
1050         int status;
1051
1052         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1053
1054         if (lp->phy_type == 0)
1055                 return;
1056
1057         smc911x_phy_check_media(dev, 0);
1058         /* read to clear status bits */
1059         SMC_GET_PHY_INT_SRC(phyaddr,status);
1060         DBG(SMC_DEBUG_MISC, "%s: PHY interrupt status 0x%04x\n",
1061                 dev->name, status & 0xffff);
1062         DBG(SMC_DEBUG_MISC, "%s: AFC_CFG 0x%08x\n",
1063                 dev->name, SMC_GET_AFC_CFG());
1064 }
1065
1066 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1067
1068 /*
1069  * This is the main routine of the driver, to handle the device when
1070  * it needs some attention.
1071  */
1072 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1073 {
1074         struct net_device *dev = dev_id;
1075         unsigned long ioaddr = dev->base_addr;
1076         struct smc911x_local *lp = netdev_priv(dev);
1077         unsigned int status, mask, timeout;
1078         unsigned int rx_overrun=0, cr, pkts;
1079         unsigned long flags;
1080
1081         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1082
1083         spin_lock_irqsave(&lp->lock, flags);
1084
1085         /* Spurious interrupt check */
1086         if ((SMC_GET_IRQ_CFG() & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1087                 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1088                 spin_unlock_irqrestore(&lp->lock, flags);
1089                 return IRQ_NONE;
1090         }
1091
1092         mask = SMC_GET_INT_EN();
1093         SMC_SET_INT_EN(0);
1094
1095         /* set a timeout value, so I don't stay here forever */
1096         timeout = 8;
1097
1098
1099         do {
1100                 status = SMC_GET_INT();
1101
1102                 DBG(SMC_DEBUG_MISC, "%s: INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1103                         dev->name, status, mask, status & ~mask);
1104
1105                 status &= mask;
1106                 if (!status)
1107                         break;
1108
1109                 /* Handle SW interrupt condition */
1110                 if (status & INT_STS_SW_INT_) {
1111                         SMC_ACK_INT(INT_STS_SW_INT_);
1112                         mask &= ~INT_EN_SW_INT_EN_;
1113                 }
1114                 /* Handle various error conditions */
1115                 if (status & INT_STS_RXE_) {
1116                         SMC_ACK_INT(INT_STS_RXE_);
1117                         dev->stats.rx_errors++;
1118                 }
1119                 if (status & INT_STS_RXDFH_INT_) {
1120                         SMC_ACK_INT(INT_STS_RXDFH_INT_);
1121                         dev->stats.rx_dropped+=SMC_GET_RX_DROP();
1122                  }
1123                 /* Undocumented interrupt-what is the right thing to do here? */
1124                 if (status & INT_STS_RXDF_INT_) {
1125                         SMC_ACK_INT(INT_STS_RXDF_INT_);
1126                 }
1127
1128                 /* Rx Data FIFO exceeds set level */
1129                 if (status & INT_STS_RDFL_) {
1130                         if (IS_REV_A(lp->revision)) {
1131                                 rx_overrun=1;
1132                                 SMC_GET_MAC_CR(cr);
1133                                 cr &= ~MAC_CR_RXEN_;
1134                                 SMC_SET_MAC_CR(cr);
1135                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1136                                 dev->stats.rx_errors++;
1137                                 dev->stats.rx_fifo_errors++;
1138                         }
1139                         SMC_ACK_INT(INT_STS_RDFL_);
1140                 }
1141                 if (status & INT_STS_RDFO_) {
1142                         if (!IS_REV_A(lp->revision)) {
1143                                 SMC_GET_MAC_CR(cr);
1144                                 cr &= ~MAC_CR_RXEN_;
1145                                 SMC_SET_MAC_CR(cr);
1146                                 rx_overrun=1;
1147                                 DBG(SMC_DEBUG_RX, "%s: RX overrun\n", dev->name);
1148                                 dev->stats.rx_errors++;
1149                                 dev->stats.rx_fifo_errors++;
1150                         }
1151                         SMC_ACK_INT(INT_STS_RDFO_);
1152                 }
1153                 /* Handle receive condition */
1154                 if ((status & INT_STS_RSFL_) || rx_overrun) {
1155                         unsigned int fifo;
1156                         DBG(SMC_DEBUG_RX, "%s: RX irq\n", dev->name);
1157                         fifo = SMC_GET_RX_FIFO_INF();
1158                         pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1159                         DBG(SMC_DEBUG_RX, "%s: Rx FIFO pkts %d, bytes %d\n",
1160                                 dev->name, pkts, fifo & 0xFFFF );
1161                         if (pkts != 0) {
1162 #ifdef SMC_USE_DMA
1163                                 unsigned int fifo;
1164                                 if (lp->rxdma_active){
1165                                         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1166                                                 "%s: RX DMA active\n", dev->name);
1167                                         /* The DMA is already running so up the IRQ threshold */
1168                                         fifo = SMC_GET_FIFO_INT() & ~0xFF;
1169                                         fifo |= pkts & 0xFF;
1170                                         DBG(SMC_DEBUG_RX,
1171                                                 "%s: Setting RX stat FIFO threshold to %d\n",
1172                                                 dev->name, fifo & 0xff);
1173                                         SMC_SET_FIFO_INT(fifo);
1174                                 } else
1175 #endif
1176                                 smc911x_rcv(dev);
1177                         }
1178                         SMC_ACK_INT(INT_STS_RSFL_);
1179                 }
1180                 /* Handle transmit FIFO available */
1181                 if (status & INT_STS_TDFA_) {
1182                         DBG(SMC_DEBUG_TX, "%s: TX data FIFO space available irq\n", dev->name);
1183                         SMC_SET_FIFO_TDA(0xFF);
1184                         lp->tx_throttle = 0;
1185 #ifdef SMC_USE_DMA
1186                         if (!lp->txdma_active)
1187 #endif
1188                                 netif_wake_queue(dev);
1189                         SMC_ACK_INT(INT_STS_TDFA_);
1190                 }
1191                 /* Handle transmit done condition */
1192 #if 1
1193                 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1194                         DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC,
1195                                 "%s: Tx stat FIFO limit (%d) /GPT irq\n",
1196                                 dev->name, (SMC_GET_FIFO_INT() & 0x00ff0000) >> 16);
1197                         smc911x_tx(dev);
1198                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1199                         SMC_ACK_INT(INT_STS_TSFL_);
1200                         SMC_ACK_INT(INT_STS_TSFL_ | INT_STS_GPT_INT_);
1201                 }
1202 #else
1203                 if (status & INT_STS_TSFL_) {
1204                         DBG(SMC_DEBUG_TX, "%s: TX status FIFO limit (%d) irq \n", dev->name, );
1205                         smc911x_tx(dev);
1206                         SMC_ACK_INT(INT_STS_TSFL_);
1207                 }
1208
1209                 if (status & INT_STS_GPT_INT_) {
1210                         DBG(SMC_DEBUG_RX, "%s: IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1211                                 dev->name,
1212                                 SMC_GET_IRQ_CFG(),
1213                                 SMC_GET_FIFO_INT(),
1214                                 SMC_GET_RX_CFG());
1215                         DBG(SMC_DEBUG_RX, "%s: Rx Stat FIFO Used 0x%02x "
1216                                 "Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1217                                 dev->name,
1218                                 (SMC_GET_RX_FIFO_INF() & 0x00ff0000) >> 16,
1219                                 SMC_GET_RX_FIFO_INF() & 0xffff,
1220                                 SMC_GET_RX_STS_FIFO_PEEK());
1221                         SMC_SET_GPT_CFG(GPT_CFG_TIMER_EN_ | 10000);
1222                         SMC_ACK_INT(INT_STS_GPT_INT_);
1223                 }
1224 #endif
1225
1226                 /* Handle PHY interrupt condition */
1227                 if (status & INT_STS_PHY_INT_) {
1228                         DBG(SMC_DEBUG_MISC, "%s: PHY irq\n", dev->name);
1229                         smc911x_phy_interrupt(dev);
1230                         SMC_ACK_INT(INT_STS_PHY_INT_);
1231                 }
1232         } while (--timeout);
1233
1234         /* restore mask state */
1235         SMC_SET_INT_EN(mask);
1236
1237         DBG(SMC_DEBUG_MISC, "%s: Interrupt done (%d loops)\n",
1238                 dev->name, 8-timeout);
1239
1240         spin_unlock_irqrestore(&lp->lock, flags);
1241
1242         DBG(3, "%s: Interrupt done (%d loops)\n", dev->name, 8-timeout);
1243
1244         return IRQ_HANDLED;
1245 }
1246
1247 #ifdef SMC_USE_DMA
1248 static void
1249 smc911x_tx_dma_irq(int dma, void *data)
1250 {
1251         struct net_device *dev = (struct net_device *)data;
1252         struct smc911x_local *lp = netdev_priv(dev);
1253         struct sk_buff *skb = lp->current_tx_skb;
1254         unsigned long flags;
1255
1256         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1257
1258         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, "%s: TX DMA irq handler\n", dev->name);
1259         /* Clear the DMA interrupt sources */
1260         SMC_DMA_ACK_IRQ(dev, dma);
1261         BUG_ON(skb == NULL);
1262         dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1263         dev->trans_start = jiffies;
1264         dev_kfree_skb_irq(skb);
1265         lp->current_tx_skb = NULL;
1266         if (lp->pending_tx_skb != NULL)
1267                 smc911x_hardware_send_pkt(dev);
1268         else {
1269                 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1270                         "%s: No pending Tx packets. DMA disabled\n", dev->name);
1271                 spin_lock_irqsave(&lp->lock, flags);
1272                 lp->txdma_active = 0;
1273                 if (!lp->tx_throttle) {
1274                         netif_wake_queue(dev);
1275                 }
1276                 spin_unlock_irqrestore(&lp->lock, flags);
1277         }
1278
1279         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA,
1280                 "%s: TX DMA irq completed\n", dev->name);
1281 }
1282 static void
1283 smc911x_rx_dma_irq(int dma, void *data)
1284 {
1285         struct net_device *dev = (struct net_device *)data;
1286         unsigned long ioaddr = dev->base_addr;
1287         struct smc911x_local *lp = netdev_priv(dev);
1288         struct sk_buff *skb = lp->current_rx_skb;
1289         unsigned long flags;
1290         unsigned int pkts;
1291
1292         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1293         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, "%s: RX DMA irq handler\n", dev->name);
1294         /* Clear the DMA interrupt sources */
1295         SMC_DMA_ACK_IRQ(dev, dma);
1296         dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1297         BUG_ON(skb == NULL);
1298         lp->current_rx_skb = NULL;
1299         PRINT_PKT(skb->data, skb->len);
1300         dev->last_rx = jiffies;
1301         skb->protocol = eth_type_trans(skb, dev);
1302         netif_rx(skb);
1303         dev->stats.rx_packets++;
1304         dev->stats.rx_bytes += skb->len;
1305
1306         spin_lock_irqsave(&lp->lock, flags);
1307         pkts = (SMC_GET_RX_FIFO_INF() & RX_FIFO_INF_RXSUSED_) >> 16;
1308         if (pkts != 0) {
1309                 smc911x_rcv(dev);
1310         }else {
1311                 lp->rxdma_active = 0;
1312         }
1313         spin_unlock_irqrestore(&lp->lock, flags);
1314         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA,
1315                 "%s: RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1316                 dev->name, pkts);
1317 }
1318 #endif   /* SMC_USE_DMA */
1319
1320 #ifdef CONFIG_NET_POLL_CONTROLLER
1321 /*
1322  * Polling receive - used by netconsole and other diagnostic tools
1323  * to allow network i/o with interrupts disabled.
1324  */
1325 static void smc911x_poll_controller(struct net_device *dev)
1326 {
1327         disable_irq(dev->irq);
1328         smc911x_interrupt(dev->irq, dev);
1329         enable_irq(dev->irq);
1330 }
1331 #endif
1332
1333 /* Our watchdog timed out. Called by the networking layer */
1334 static void smc911x_timeout(struct net_device *dev)
1335 {
1336         struct smc911x_local *lp = netdev_priv(dev);
1337         unsigned long ioaddr = dev->base_addr;
1338         int status, mask;
1339         unsigned long flags;
1340
1341         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1342
1343         spin_lock_irqsave(&lp->lock, flags);
1344         status = SMC_GET_INT();
1345         mask = SMC_GET_INT_EN();
1346         spin_unlock_irqrestore(&lp->lock, flags);
1347         DBG(SMC_DEBUG_MISC, "%s: INT 0x%02x MASK 0x%02x \n",
1348                 dev->name, status, mask);
1349
1350         /* Dump the current TX FIFO contents and restart */
1351         mask = SMC_GET_TX_CFG();
1352         SMC_SET_TX_CFG(mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1353         /*
1354          * Reconfiguring the PHY doesn't seem like a bad idea here, but
1355          * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1356          * which calls schedule().       Hence we use a work queue.
1357          */
1358         if (lp->phy_type != 0) {
1359                 if (schedule_work(&lp->phy_configure)) {
1360                         lp->work_pending = 1;
1361                 }
1362         }
1363
1364         /* We can accept TX packets again */
1365         dev->trans_start = jiffies;
1366         netif_wake_queue(dev);
1367 }
1368
1369 /*
1370  * This routine will, depending on the values passed to it,
1371  * either make it accept multicast packets, go into
1372  * promiscuous mode (for TCPDUMP and cousins) or accept
1373  * a select set of multicast packets
1374  */
1375 static void smc911x_set_multicast_list(struct net_device *dev)
1376 {
1377         struct smc911x_local *lp = netdev_priv(dev);
1378         unsigned long ioaddr = dev->base_addr;
1379         unsigned int multicast_table[2];
1380         unsigned int mcr, update_multicast = 0;
1381         unsigned long flags;
1382         /* table for flipping the order of 5 bits */
1383         static const unsigned char invert5[] =
1384                 {0x00, 0x10, 0x08, 0x18, 0x04, 0x14, 0x0C, 0x1C,
1385                  0x02, 0x12, 0x0A, 0x1A, 0x06, 0x16, 0x0E, 0x1E,
1386                  0x01, 0x11, 0x09, 0x19, 0x05, 0x15, 0x0D, 0x1D,
1387                  0x03, 0x13, 0x0B, 0x1B, 0x07, 0x17, 0x0F, 0x1F};
1388
1389
1390         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1391
1392         spin_lock_irqsave(&lp->lock, flags);
1393         SMC_GET_MAC_CR(mcr);
1394         spin_unlock_irqrestore(&lp->lock, flags);
1395
1396         if (dev->flags & IFF_PROMISC) {
1397
1398                 DBG(SMC_DEBUG_MISC, "%s: RCR_PRMS\n", dev->name);
1399                 mcr |= MAC_CR_PRMS_;
1400         }
1401         /*
1402          * Here, I am setting this to accept all multicast packets.
1403          * I don't need to zero the multicast table, because the flag is
1404          * checked before the table is
1405          */
1406         else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
1407                 DBG(SMC_DEBUG_MISC, "%s: RCR_ALMUL\n", dev->name);
1408                 mcr |= MAC_CR_MCPAS_;
1409         }
1410
1411         /*
1412          * This sets the internal hardware table to filter out unwanted
1413          * multicast packets before they take up memory.
1414          *
1415          * The SMC chip uses a hash table where the high 6 bits of the CRC of
1416          * address are the offset into the table.       If that bit is 1, then the
1417          * multicast packet is accepted.  Otherwise, it's dropped silently.
1418          *
1419          * To use the 6 bits as an offset into the table, the high 1 bit is
1420          * the number of the 32 bit register, while the low 5 bits are the bit
1421          * within that register.
1422          */
1423         else if (dev->mc_count)  {
1424                 int i;
1425                 struct dev_mc_list *cur_addr;
1426
1427                 /* Set the Hash perfec mode */
1428                 mcr |= MAC_CR_HPFILT_;
1429
1430                 /* start with a table of all zeros: reject all */
1431                 memset(multicast_table, 0, sizeof(multicast_table));
1432
1433                 cur_addr = dev->mc_list;
1434                 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
1435                         int position;
1436
1437                         /* do we have a pointer here? */
1438                         if (!cur_addr)
1439                                 break;
1440                         /* make sure this is a multicast address -
1441                                 shouldn't this be a given if we have it here ? */
1442                         if (!(*cur_addr->dmi_addr & 1))
1443                                  continue;
1444
1445                         /* only use the low order bits */
1446                         position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f;
1447
1448                         /* do some messy swapping to put the bit in the right spot */
1449                         multicast_table[invert5[position&0x1F]&0x1] |=
1450                                 (1<<invert5[(position>>1)&0x1F]);
1451                 }
1452
1453                 /* be sure I get rid of flags I might have set */
1454                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1455
1456                 /* now, the table can be loaded into the chipset */
1457                 update_multicast = 1;
1458         } else   {
1459                 DBG(SMC_DEBUG_MISC, "%s: ~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n",
1460                         dev->name);
1461                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1462
1463                 /*
1464                  * since I'm disabling all multicast entirely, I need to
1465                  * clear the multicast list
1466                  */
1467                 memset(multicast_table, 0, sizeof(multicast_table));
1468                 update_multicast = 1;
1469         }
1470
1471         spin_lock_irqsave(&lp->lock, flags);
1472         SMC_SET_MAC_CR(mcr);
1473         if (update_multicast) {
1474                 DBG(SMC_DEBUG_MISC,
1475                         "%s: update mcast hash table 0x%08x 0x%08x\n",
1476                         dev->name, multicast_table[0], multicast_table[1]);
1477                 SMC_SET_HASHL(multicast_table[0]);
1478                 SMC_SET_HASHH(multicast_table[1]);
1479         }
1480         spin_unlock_irqrestore(&lp->lock, flags);
1481 }
1482
1483
1484 /*
1485  * Open and Initialize the board
1486  *
1487  * Set up everything, reset the card, etc..
1488  */
1489 static int
1490 smc911x_open(struct net_device *dev)
1491 {
1492         struct smc911x_local *lp = netdev_priv(dev);
1493
1494         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1495
1496         /*
1497          * Check that the address is valid.  If its not, refuse
1498          * to bring the device up.       The user must specify an
1499          * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
1500          */
1501         if (!is_valid_ether_addr(dev->dev_addr)) {
1502                 PRINTK("%s: no valid ethernet hw addr\n", __FUNCTION__);
1503                 return -EINVAL;
1504         }
1505
1506         /* reset the hardware */
1507         smc911x_reset(dev);
1508
1509         /* Configure the PHY, initialize the link state */
1510         smc911x_phy_configure(&lp->phy_configure);
1511
1512         /* Turn on Tx + Rx */
1513         smc911x_enable(dev);
1514
1515         netif_start_queue(dev);
1516
1517         return 0;
1518 }
1519
1520 /*
1521  * smc911x_close
1522  *
1523  * this makes the board clean up everything that it can
1524  * and not talk to the outside world.    Caused by
1525  * an 'ifconfig ethX down'
1526  */
1527 static int smc911x_close(struct net_device *dev)
1528 {
1529         struct smc911x_local *lp = netdev_priv(dev);
1530
1531         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1532
1533         netif_stop_queue(dev);
1534         netif_carrier_off(dev);
1535
1536         /* clear everything */
1537         smc911x_shutdown(dev);
1538
1539         if (lp->phy_type != 0) {
1540                 /* We need to ensure that no calls to
1541                  * smc911x_phy_configure are pending.
1542
1543                  * flush_scheduled_work() cannot be called because we
1544                  * are running with the netlink semaphore held (from
1545                  * devinet_ioctl()) and the pending work queue
1546                  * contains linkwatch_event() (scheduled by
1547                  * netif_carrier_off() above). linkwatch_event() also
1548                  * wants the netlink semaphore.
1549                  */
1550                 while (lp->work_pending)
1551                         schedule();
1552                 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1553         }
1554
1555         if (lp->pending_tx_skb) {
1556                 dev_kfree_skb(lp->pending_tx_skb);
1557                 lp->pending_tx_skb = NULL;
1558         }
1559
1560         return 0;
1561 }
1562
1563 /*
1564  * Ethtool support
1565  */
1566 static int
1567 smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1568 {
1569         struct smc911x_local *lp = netdev_priv(dev);
1570         unsigned long ioaddr = dev->base_addr;
1571         int ret, status;
1572         unsigned long flags;
1573
1574         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1575         cmd->maxtxpkt = 1;
1576         cmd->maxrxpkt = 1;
1577
1578         if (lp->phy_type != 0) {
1579                 spin_lock_irqsave(&lp->lock, flags);
1580                 ret = mii_ethtool_gset(&lp->mii, cmd);
1581                 spin_unlock_irqrestore(&lp->lock, flags);
1582         } else {
1583                 cmd->supported = SUPPORTED_10baseT_Half |
1584                                 SUPPORTED_10baseT_Full |
1585                                 SUPPORTED_TP | SUPPORTED_AUI;
1586
1587                 if (lp->ctl_rspeed == 10)
1588                         cmd->speed = SPEED_10;
1589                 else if (lp->ctl_rspeed == 100)
1590                         cmd->speed = SPEED_100;
1591
1592                 cmd->autoneg = AUTONEG_DISABLE;
1593                 if (lp->mii.phy_id==1)
1594                         cmd->transceiver = XCVR_INTERNAL;
1595                 else
1596                         cmd->transceiver = XCVR_EXTERNAL;
1597                 cmd->port = 0;
1598                 SMC_GET_PHY_SPECIAL(lp->mii.phy_id, status);
1599                 cmd->duplex =
1600                         (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1601                                 DUPLEX_FULL : DUPLEX_HALF;
1602                 ret = 0;
1603         }
1604
1605         return ret;
1606 }
1607
1608 static int
1609 smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1610 {
1611         struct smc911x_local *lp = netdev_priv(dev);
1612         int ret;
1613         unsigned long flags;
1614
1615         if (lp->phy_type != 0) {
1616                 spin_lock_irqsave(&lp->lock, flags);
1617                 ret = mii_ethtool_sset(&lp->mii, cmd);
1618                 spin_unlock_irqrestore(&lp->lock, flags);
1619         } else {
1620                 if (cmd->autoneg != AUTONEG_DISABLE ||
1621                         cmd->speed != SPEED_10 ||
1622                         (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1623                         (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1624                         return -EINVAL;
1625
1626                 lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1627
1628                 ret = 0;
1629         }
1630
1631         return ret;
1632 }
1633
1634 static void
1635 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1636 {
1637         strncpy(info->driver, CARDNAME, sizeof(info->driver));
1638         strncpy(info->version, version, sizeof(info->version));
1639         strncpy(info->bus_info, dev->dev.parent->bus_id, sizeof(info->bus_info));
1640 }
1641
1642 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1643 {
1644         struct smc911x_local *lp = netdev_priv(dev);
1645         int ret = -EINVAL;
1646         unsigned long flags;
1647
1648         if (lp->phy_type != 0) {
1649                 spin_lock_irqsave(&lp->lock, flags);
1650                 ret = mii_nway_restart(&lp->mii);
1651                 spin_unlock_irqrestore(&lp->lock, flags);
1652         }
1653
1654         return ret;
1655 }
1656
1657 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1658 {
1659         struct smc911x_local *lp = netdev_priv(dev);
1660         return lp->msg_enable;
1661 }
1662
1663 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1664 {
1665         struct smc911x_local *lp = netdev_priv(dev);
1666         lp->msg_enable = level;
1667 }
1668
1669 static int smc911x_ethtool_getregslen(struct net_device *dev)
1670 {
1671         /* System regs + MAC regs + PHY regs */
1672         return (((E2P_CMD - ID_REV)/4 + 1) +
1673                         (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1674 }
1675
1676 static void smc911x_ethtool_getregs(struct net_device *dev,
1677                                                                                  struct ethtool_regs* regs, void *buf)
1678 {
1679         unsigned long ioaddr = dev->base_addr;
1680         struct smc911x_local *lp = netdev_priv(dev);
1681         unsigned long flags;
1682         u32 reg,i,j=0;
1683         u32 *data = (u32*)buf;
1684
1685         regs->version = lp->version;
1686         for(i=ID_REV;i<=E2P_CMD;i+=4) {
1687                 data[j++] = SMC_inl(ioaddr,i);
1688         }
1689         for(i=MAC_CR;i<=WUCSR;i++) {
1690                 spin_lock_irqsave(&lp->lock, flags);
1691                 SMC_GET_MAC_CSR(i, reg);
1692                 spin_unlock_irqrestore(&lp->lock, flags);
1693                 data[j++] = reg;
1694         }
1695         for(i=0;i<=31;i++) {
1696                 spin_lock_irqsave(&lp->lock, flags);
1697                 SMC_GET_MII(i, lp->mii.phy_id, reg);
1698                 spin_unlock_irqrestore(&lp->lock, flags);
1699                 data[j++] = reg & 0xFFFF;
1700         }
1701 }
1702
1703 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1704 {
1705         unsigned long ioaddr = dev->base_addr;
1706         unsigned int timeout;
1707         int e2p_cmd;
1708
1709         e2p_cmd = SMC_GET_E2P_CMD();
1710         for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1711                 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1712                         PRINTK("%s: %s timeout waiting for EEPROM to respond\n",
1713                                 dev->name, __FUNCTION__);
1714                         return -EFAULT;
1715                 }
1716                 mdelay(1);
1717                 e2p_cmd = SMC_GET_E2P_CMD();
1718         }
1719         if (timeout == 0) {
1720                 PRINTK("%s: %s timeout waiting for EEPROM CMD not busy\n",
1721                         dev->name, __FUNCTION__);
1722                 return -ETIMEDOUT;
1723         }
1724         return 0;
1725 }
1726
1727 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1728                                                                                                         int cmd, int addr)
1729 {
1730         unsigned long ioaddr = dev->base_addr;
1731         int ret;
1732
1733         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1734                 return ret;
1735         SMC_SET_E2P_CMD(E2P_CMD_EPC_BUSY_ |
1736                 ((cmd) & (0x7<<28)) |
1737                 ((addr) & 0xFF));
1738         return 0;
1739 }
1740
1741 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1742                                                                                                         u8 *data)
1743 {
1744         unsigned long ioaddr = dev->base_addr;
1745         int ret;
1746
1747         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1748                 return ret;
1749         *data = SMC_GET_E2P_DATA();
1750         return 0;
1751 }
1752
1753 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1754                                                                                                          u8 data)
1755 {
1756         unsigned long ioaddr = dev->base_addr;
1757         int ret;
1758
1759         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1760                 return ret;
1761         SMC_SET_E2P_DATA(data);
1762         return 0;
1763 }
1764
1765 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1766                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1767 {
1768         u8 eebuf[SMC911X_EEPROM_LEN];
1769         int i, ret;
1770
1771         for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1772                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1773                         return ret;
1774                 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1775                         return ret;
1776                 }
1777         memcpy(data, eebuf+eeprom->offset, eeprom->len);
1778         return 0;
1779 }
1780
1781 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1782                                                                            struct ethtool_eeprom *eeprom, u8 *data)
1783 {
1784         int i, ret;
1785
1786         /* Enable erase */
1787         if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1788                 return ret;
1789         for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1790                 /* erase byte */
1791                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1792                         return ret;
1793                 /* write byte */
1794                 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1795                          return ret;
1796                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1797                         return ret;
1798                 }
1799          return 0;
1800 }
1801
1802 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1803 {
1804          return SMC911X_EEPROM_LEN;
1805 }
1806
1807 static const struct ethtool_ops smc911x_ethtool_ops = {
1808         .get_settings    = smc911x_ethtool_getsettings,
1809         .set_settings    = smc911x_ethtool_setsettings,
1810         .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1811         .get_msglevel    = smc911x_ethtool_getmsglevel,
1812         .set_msglevel    = smc911x_ethtool_setmsglevel,
1813         .nway_reset = smc911x_ethtool_nwayreset,
1814         .get_link        = ethtool_op_get_link,
1815         .get_regs_len    = smc911x_ethtool_getregslen,
1816         .get_regs        = smc911x_ethtool_getregs,
1817         .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1818         .get_eeprom = smc911x_ethtool_geteeprom,
1819         .set_eeprom = smc911x_ethtool_seteeprom,
1820 };
1821
1822 /*
1823  * smc911x_findirq
1824  *
1825  * This routine has a simple purpose -- make the SMC chip generate an
1826  * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1827  */
1828 static int __init smc911x_findirq(unsigned long ioaddr)
1829 {
1830         int timeout = 20;
1831         unsigned long cookie;
1832
1833         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
1834
1835         cookie = probe_irq_on();
1836
1837         /*
1838          * Force a SW interrupt
1839          */
1840
1841         SMC_SET_INT_EN(INT_EN_SW_INT_EN_);
1842
1843         /*
1844          * Wait until positive that the interrupt has been generated
1845          */
1846         do {
1847                 int int_status;
1848                 udelay(10);
1849                 int_status = SMC_GET_INT_EN();
1850                 if (int_status & INT_EN_SW_INT_EN_)
1851                          break;         /* got the interrupt */
1852         } while (--timeout);
1853
1854         /*
1855          * there is really nothing that I can do here if timeout fails,
1856          * as autoirq_report will return a 0 anyway, which is what I
1857          * want in this case.    Plus, the clean up is needed in both
1858          * cases.
1859          */
1860
1861         /* and disable all interrupts again */
1862         SMC_SET_INT_EN(0);
1863
1864         /* and return what I found */
1865         return probe_irq_off(cookie);
1866 }
1867
1868 /*
1869  * Function: smc911x_probe(unsigned long ioaddr)
1870  *
1871  * Purpose:
1872  *       Tests to see if a given ioaddr points to an SMC911x chip.
1873  *       Returns a 0 on success
1874  *
1875  * Algorithm:
1876  *       (1) see if the endian word is OK
1877  *       (1) see if I recognize the chip ID in the appropriate register
1878  *
1879  * Here I do typical initialization tasks.
1880  *
1881  * o  Initialize the structure if needed
1882  * o  print out my vanity message if not done so already
1883  * o  print out what type of hardware is detected
1884  * o  print out the ethernet address
1885  * o  find the IRQ
1886  * o  set up my private data
1887  * o  configure the dev structure with my subroutines
1888  * o  actually GRAB the irq.
1889  * o  GRAB the region
1890  */
1891 static int __init smc911x_probe(struct net_device *dev, unsigned long ioaddr)
1892 {
1893         struct smc911x_local *lp = netdev_priv(dev);
1894         int i, retval;
1895         unsigned int val, chip_id, revision;
1896         const char *version_string;
1897
1898         DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__);
1899
1900         /* First, see if the endian word is recognized */
1901         val = SMC_GET_BYTE_TEST();
1902         DBG(SMC_DEBUG_MISC, "%s: endian probe returned 0x%04x\n", CARDNAME, val);
1903         if (val != 0x87654321) {
1904                 printk(KERN_ERR "Invalid chip endian 0x08%x\n",val);
1905                 retval = -ENODEV;
1906                 goto err_out;
1907         }
1908
1909         /*
1910          * check if the revision register is something that I
1911          * recognize.   These might need to be added to later,
1912          * as future revisions could be added.
1913          */
1914         chip_id = SMC_GET_PN();
1915         DBG(SMC_DEBUG_MISC, "%s: id probe returned 0x%04x\n", CARDNAME, chip_id);
1916         for(i=0;chip_ids[i].id != 0; i++) {
1917                 if (chip_ids[i].id == chip_id) break;
1918         }
1919         if (!chip_ids[i].id) {
1920                 printk(KERN_ERR "Unknown chip ID %04x\n", chip_id);
1921                 retval = -ENODEV;
1922                 goto err_out;
1923         }
1924         version_string = chip_ids[i].name;
1925
1926         revision = SMC_GET_REV();
1927         DBG(SMC_DEBUG_MISC, "%s: revision = 0x%04x\n", CARDNAME, revision);
1928
1929         /* At this point I'll assume that the chip is an SMC911x. */
1930         DBG(SMC_DEBUG_MISC, "%s: Found a %s\n", CARDNAME, chip_ids[i].name);
1931
1932         /* Validate the TX FIFO size requested */
1933         if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1934                 printk(KERN_ERR "Invalid TX FIFO size requested %d\n", tx_fifo_kb);
1935                 retval = -EINVAL;
1936                 goto err_out;
1937         }
1938
1939         /* fill in some of the fields */
1940         dev->base_addr = ioaddr;
1941         lp->version = chip_ids[i].id;
1942         lp->revision = revision;
1943         lp->tx_fifo_kb = tx_fifo_kb;
1944         /* Reverse calculate the RX FIFO size from the TX */
1945         lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1946         lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1947
1948         /* Set the automatic flow control values */
1949         switch(lp->tx_fifo_kb) {
1950                 /*
1951                  *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1952                  *       AFC_LO is AFC_HI/2
1953                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1954                  */
1955                 case 2:/* 13440 Rx Data Fifo Size */
1956                         lp->afc_cfg=0x008C46AF;break;
1957                 case 3:/* 12480 Rx Data Fifo Size */
1958                         lp->afc_cfg=0x0082419F;break;
1959                 case 4:/* 11520 Rx Data Fifo Size */
1960                         lp->afc_cfg=0x00783C9F;break;
1961                 case 5:/* 10560 Rx Data Fifo Size */
1962                         lp->afc_cfg=0x006E374F;break;
1963                 case 6:/* 9600 Rx Data Fifo Size */
1964                         lp->afc_cfg=0x0064328F;break;
1965                 case 7:/* 8640 Rx Data Fifo Size */
1966                         lp->afc_cfg=0x005A2D7F;break;
1967                 case 8:/* 7680 Rx Data Fifo Size */
1968                         lp->afc_cfg=0x0050287F;break;
1969                 case 9:/* 6720 Rx Data Fifo Size */
1970                         lp->afc_cfg=0x0046236F;break;
1971                 case 10:/* 5760 Rx Data Fifo Size */
1972                         lp->afc_cfg=0x003C1E6F;break;
1973                 case 11:/* 4800 Rx Data Fifo Size */
1974                         lp->afc_cfg=0x0032195F;break;
1975                 /*
1976                  *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1977                  *       AFC_LO is AFC_HI/2
1978                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1979                  */
1980                 case 12:/* 3840 Rx Data Fifo Size */
1981                         lp->afc_cfg=0x0024124F;break;
1982                 case 13:/* 2880 Rx Data Fifo Size */
1983                         lp->afc_cfg=0x0015073F;break;
1984                 case 14:/* 1920 Rx Data Fifo Size */
1985                         lp->afc_cfg=0x0006032F;break;
1986                  default:
1987                          PRINTK("%s: ERROR -- no AFC_CFG setting found",
1988                                 dev->name);
1989                          break;
1990         }
1991
1992         DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX,
1993                 "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1994                 lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1995
1996         spin_lock_init(&lp->lock);
1997
1998         /* Get the MAC address */
1999         SMC_GET_MAC_ADDR(dev->dev_addr);
2000
2001         /* now, reset the chip, and put it into a known state */
2002         smc911x_reset(dev);
2003
2004         /*
2005          * If dev->irq is 0, then the device has to be banged on to see
2006          * what the IRQ is.
2007          *
2008          * Specifying an IRQ is done with the assumption that the user knows
2009          * what (s)he is doing.  No checking is done!!!!
2010          */
2011         if (dev->irq < 1) {
2012                 int trials;
2013
2014                 trials = 3;
2015                 while (trials--) {
2016                         dev->irq = smc911x_findirq(ioaddr);
2017                         if (dev->irq)
2018                                 break;
2019                         /* kick the card and try again */
2020                         smc911x_reset(dev);
2021                 }
2022         }
2023         if (dev->irq == 0) {
2024                 printk("%s: Couldn't autodetect your IRQ. Use irq=xx.\n",
2025                         dev->name);
2026                 retval = -ENODEV;
2027                 goto err_out;
2028         }
2029         dev->irq = irq_canonicalize(dev->irq);
2030
2031         /* Fill in the fields of the device structure with ethernet values. */
2032         ether_setup(dev);
2033
2034         dev->open = smc911x_open;
2035         dev->stop = smc911x_close;
2036         dev->hard_start_xmit = smc911x_hard_start_xmit;
2037         dev->tx_timeout = smc911x_timeout;
2038         dev->watchdog_timeo = msecs_to_jiffies(watchdog);
2039         dev->set_multicast_list = smc911x_set_multicast_list;
2040         dev->ethtool_ops = &smc911x_ethtool_ops;
2041 #ifdef CONFIG_NET_POLL_CONTROLLER
2042         dev->poll_controller = smc911x_poll_controller;
2043 #endif
2044
2045         INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
2046         lp->mii.phy_id_mask = 0x1f;
2047         lp->mii.reg_num_mask = 0x1f;
2048         lp->mii.force_media = 0;
2049         lp->mii.full_duplex = 0;
2050         lp->mii.dev = dev;
2051         lp->mii.mdio_read = smc911x_phy_read;
2052         lp->mii.mdio_write = smc911x_phy_write;
2053
2054         /*
2055          * Locate the phy, if any.
2056          */
2057         smc911x_phy_detect(dev);
2058
2059         /* Set default parameters */
2060         lp->msg_enable = NETIF_MSG_LINK;
2061         lp->ctl_rfduplx = 1;
2062         lp->ctl_rspeed = 100;
2063
2064         /* Grab the IRQ */
2065         retval = request_irq(dev->irq, &smc911x_interrupt,
2066                         IRQF_SHARED | SMC_IRQ_SENSE, dev->name, dev);
2067         if (retval)
2068                 goto err_out;
2069
2070 #ifdef SMC_USE_DMA
2071         lp->rxdma = SMC_DMA_REQUEST(dev, smc911x_rx_dma_irq);
2072         lp->txdma = SMC_DMA_REQUEST(dev, smc911x_tx_dma_irq);
2073         lp->rxdma_active = 0;
2074         lp->txdma_active = 0;
2075         dev->dma = lp->rxdma;
2076 #endif
2077
2078         retval = register_netdev(dev);
2079         if (retval == 0) {
2080                 /* now, print out the card info, in a short format.. */
2081                 printk("%s: %s (rev %d) at %#lx IRQ %d",
2082                         dev->name, version_string, lp->revision,
2083                         dev->base_addr, dev->irq);
2084
2085 #ifdef SMC_USE_DMA
2086                 if (lp->rxdma != -1)
2087                         printk(" RXDMA %d ", lp->rxdma);
2088
2089                 if (lp->txdma != -1)
2090                         printk("TXDMA %d", lp->txdma);
2091 #endif
2092                 printk("\n");
2093                 if (!is_valid_ether_addr(dev->dev_addr)) {
2094                         printk("%s: Invalid ethernet MAC address. Please "
2095                                         "set using ifconfig\n", dev->name);
2096                 } else {
2097                         /* Print the Ethernet address */
2098                         printk("%s: Ethernet addr: ", dev->name);
2099                         for (i = 0; i < 5; i++)
2100                                 printk("%2.2x:", dev->dev_addr[i]);
2101                         printk("%2.2x\n", dev->dev_addr[5]);
2102                 }
2103
2104                 if (lp->phy_type == 0) {
2105                         PRINTK("%s: No PHY found\n", dev->name);
2106                 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2107                         PRINTK("%s: LAN911x Internal PHY\n", dev->name);
2108                 } else {
2109                         PRINTK("%s: External PHY 0x%08x\n", dev->name, lp->phy_type);
2110                 }
2111         }
2112
2113 err_out:
2114 #ifdef SMC_USE_DMA
2115         if (retval) {
2116                 if (lp->rxdma != -1) {
2117                         SMC_DMA_FREE(dev, lp->rxdma);
2118                 }
2119                 if (lp->txdma != -1) {
2120                         SMC_DMA_FREE(dev, lp->txdma);
2121                 }
2122         }
2123 #endif
2124         return retval;
2125 }
2126
2127 /*
2128  * smc911x_init(void)
2129  *
2130  *        Output:
2131  *       0 --> there is a device
2132  *       anything else, error
2133  */
2134 static int smc911x_drv_probe(struct platform_device *pdev)
2135 {
2136         struct net_device *ndev;
2137         struct resource *res;
2138         struct smc911x_local *lp;
2139         unsigned int *addr;
2140         int ret;
2141
2142         DBG(SMC_DEBUG_FUNC, "--> %s\n",  __FUNCTION__);
2143         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2144         if (!res) {
2145                 ret = -ENODEV;
2146                 goto out;
2147         }
2148
2149         /*
2150          * Request the regions.
2151          */
2152         if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2153                  ret = -EBUSY;
2154                  goto out;
2155         }
2156
2157         ndev = alloc_etherdev(sizeof(struct smc911x_local));
2158         if (!ndev) {
2159                 printk("%s: could not allocate device.\n", CARDNAME);
2160                 ret = -ENOMEM;
2161                 goto release_1;
2162         }
2163         SET_NETDEV_DEV(ndev, &pdev->dev);
2164
2165         ndev->dma = (unsigned char)-1;
2166         ndev->irq = platform_get_irq(pdev, 0);
2167         lp = netdev_priv(ndev);
2168         lp->netdev = ndev;
2169
2170         addr = ioremap(res->start, SMC911X_IO_EXTENT);
2171         if (!addr) {
2172                 ret = -ENOMEM;
2173                 goto release_both;
2174         }
2175
2176         platform_set_drvdata(pdev, ndev);
2177         ret = smc911x_probe(ndev, (unsigned long)addr);
2178         if (ret != 0) {
2179                 platform_set_drvdata(pdev, NULL);
2180                 iounmap(addr);
2181 release_both:
2182                 free_netdev(ndev);
2183 release_1:
2184                 release_mem_region(res->start, SMC911X_IO_EXTENT);
2185 out:
2186                 printk("%s: not found (%d).\n", CARDNAME, ret);
2187         }
2188 #ifdef SMC_USE_DMA
2189         else {
2190                 lp->physaddr = res->start;
2191                 lp->dev = &pdev->dev;
2192         }
2193 #endif
2194
2195         return ret;
2196 }
2197
2198 static int smc911x_drv_remove(struct platform_device *pdev)
2199 {
2200         struct net_device *ndev = platform_get_drvdata(pdev);
2201         struct resource *res;
2202
2203         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2204         platform_set_drvdata(pdev, NULL);
2205
2206         unregister_netdev(ndev);
2207
2208         free_irq(ndev->irq, ndev);
2209
2210 #ifdef SMC_USE_DMA
2211         {
2212                 struct smc911x_local *lp = netdev_priv(ndev);
2213                 if (lp->rxdma != -1) {
2214                         SMC_DMA_FREE(dev, lp->rxdma);
2215                 }
2216                 if (lp->txdma != -1) {
2217                         SMC_DMA_FREE(dev, lp->txdma);
2218                 }
2219         }
2220 #endif
2221         iounmap((void *)ndev->base_addr);
2222         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2223         release_mem_region(res->start, SMC911X_IO_EXTENT);
2224
2225         free_netdev(ndev);
2226         return 0;
2227 }
2228
2229 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2230 {
2231         struct net_device *ndev = platform_get_drvdata(dev);
2232         unsigned long ioaddr = ndev->base_addr;
2233
2234         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2235         if (ndev) {
2236                 if (netif_running(ndev)) {
2237                         netif_device_detach(ndev);
2238                         smc911x_shutdown(ndev);
2239 #if POWER_DOWN
2240                         /* Set D2 - Energy detect only setting */
2241                         SMC_SET_PMT_CTRL(2<<12);
2242 #endif
2243                 }
2244         }
2245         return 0;
2246 }
2247
2248 static int smc911x_drv_resume(struct platform_device *dev)
2249 {
2250         struct net_device *ndev = platform_get_drvdata(dev);
2251
2252         DBG(SMC_DEBUG_FUNC, "--> %s\n", __FUNCTION__);
2253         if (ndev) {
2254                 struct smc911x_local *lp = netdev_priv(ndev);
2255
2256                 if (netif_running(ndev)) {
2257                         smc911x_reset(ndev);
2258                         smc911x_enable(ndev);
2259                         if (lp->phy_type != 0)
2260                                 smc911x_phy_configure(&lp->phy_configure);
2261                         netif_device_attach(ndev);
2262                 }
2263         }
2264         return 0;
2265 }
2266
2267 static struct platform_driver smc911x_driver = {
2268         .probe           = smc911x_drv_probe,
2269         .remove  = smc911x_drv_remove,
2270         .suspend         = smc911x_drv_suspend,
2271         .resume  = smc911x_drv_resume,
2272         .driver  = {
2273                 .name    = CARDNAME,
2274         },
2275 };
2276
2277 static int __init smc911x_init(void)
2278 {
2279         return platform_driver_register(&smc911x_driver);
2280 }
2281
2282 static void __exit smc911x_cleanup(void)
2283 {
2284         platform_driver_unregister(&smc911x_driver);
2285 }
2286
2287 module_init(smc911x_init);
2288 module_exit(smc911x_cleanup);