linux/drivers/net/ethernet/smsc/smc911x.c
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   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, see <http://www.gnu.org/licenses/>.
  21 *
  22 * Arguments:
  23 *       watchdog  = TX watchdog timeout
  24 *       tx_fifo_kb = Size of TX FIFO in KB
  25 *
  26 * History:
  27 *        04/16/05      Dustin McIntire          Initial version
  28 */
  29static const char version[] =
  30         "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
  31
  32/* Debugging options */
  33#define ENABLE_SMC_DEBUG_RX             0
  34#define ENABLE_SMC_DEBUG_TX             0
  35#define ENABLE_SMC_DEBUG_DMA            0
  36#define ENABLE_SMC_DEBUG_PKTS           0
  37#define ENABLE_SMC_DEBUG_MISC           0
  38#define ENABLE_SMC_DEBUG_FUNC           0
  39
  40#define SMC_DEBUG_RX            ((ENABLE_SMC_DEBUG_RX   ? 1 : 0) << 0)
  41#define SMC_DEBUG_TX            ((ENABLE_SMC_DEBUG_TX   ? 1 : 0) << 1)
  42#define SMC_DEBUG_DMA           ((ENABLE_SMC_DEBUG_DMA  ? 1 : 0) << 2)
  43#define SMC_DEBUG_PKTS          ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
  44#define SMC_DEBUG_MISC          ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
  45#define SMC_DEBUG_FUNC          ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
  46
  47#ifndef SMC_DEBUG
  48#define SMC_DEBUG        ( SMC_DEBUG_RX   | \
  49                           SMC_DEBUG_TX   | \
  50                           SMC_DEBUG_DMA  | \
  51                           SMC_DEBUG_PKTS | \
  52                           SMC_DEBUG_MISC | \
  53                           SMC_DEBUG_FUNC   \
  54                         )
  55#endif
  56
  57#include <linux/module.h>
  58#include <linux/kernel.h>
  59#include <linux/sched.h>
  60#include <linux/delay.h>
  61#include <linux/interrupt.h>
  62#include <linux/errno.h>
  63#include <linux/ioport.h>
  64#include <linux/crc32.h>
  65#include <linux/device.h>
  66#include <linux/platform_device.h>
  67#include <linux/spinlock.h>
  68#include <linux/ethtool.h>
  69#include <linux/mii.h>
  70#include <linux/workqueue.h>
  71
  72#include <linux/netdevice.h>
  73#include <linux/etherdevice.h>
  74#include <linux/skbuff.h>
  75
  76#include <linux/dmaengine.h>
  77#include <linux/dma/pxa-dma.h>
  78
  79#include <asm/io.h>
  80
  81#include "smc911x.h"
  82
  83/*
  84 * Transmit timeout, default 5 seconds.
  85 */
  86static int watchdog = 5000;
  87module_param(watchdog, int, 0400);
  88MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
  89
  90static int tx_fifo_kb=8;
  91module_param(tx_fifo_kb, int, 0400);
  92MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
  93
  94MODULE_LICENSE("GPL");
  95MODULE_ALIAS("platform:smc911x");
  96
  97/*
  98 * The internal workings of the driver.  If you are changing anything
  99 * here with the SMC stuff, you should have the datasheet and know
 100 * what you are doing.
 101 */
 102#define CARDNAME "smc911x"
 103
 104/*
 105 * Use power-down feature of the chip
 106 */
 107#define POWER_DOWN               1
 108
 109#if SMC_DEBUG > 0
 110#define DBG(n, dev, args...)                     \
 111        do {                                     \
 112                if (SMC_DEBUG & (n))             \
 113                        netdev_dbg(dev, args);   \
 114        } while (0)
 115
 116#define PRINTK(dev, args...)   netdev_info(dev, args)
 117#else
 118#define DBG(n, dev, args...)   do { } while (0)
 119#define PRINTK(dev, args...)   netdev_dbg(dev, args)
 120#endif
 121
 122#if SMC_DEBUG_PKTS > 0
 123static void PRINT_PKT(u_char *buf, int length)
 124{
 125        int i;
 126        int remainder;
 127        int lines;
 128
 129        lines = length / 16;
 130        remainder = length % 16;
 131
 132        for (i = 0; i < lines ; i ++) {
 133                int cur;
 134                printk(KERN_DEBUG);
 135                for (cur = 0; cur < 8; cur++) {
 136                        u_char a, b;
 137                        a = *buf++;
 138                        b = *buf++;
 139                        pr_cont("%02x%02x ", a, b);
 140                }
 141                pr_cont("\n");
 142        }
 143        printk(KERN_DEBUG);
 144        for (i = 0; i < remainder/2 ; i++) {
 145                u_char a, b;
 146                a = *buf++;
 147                b = *buf++;
 148                pr_cont("%02x%02x ", a, b);
 149        }
 150        pr_cont("\n");
 151}
 152#else
 153#define PRINT_PKT(x...)  do { } while (0)
 154#endif
 155
 156
 157/* this enables an interrupt in the interrupt mask register */
 158#define SMC_ENABLE_INT(lp, x) do {                      \
 159        unsigned int  __mask;                           \
 160        __mask = SMC_GET_INT_EN((lp));                  \
 161        __mask |= (x);                                  \
 162        SMC_SET_INT_EN((lp), __mask);                   \
 163} while (0)
 164
 165/* this disables an interrupt from the interrupt mask register */
 166#define SMC_DISABLE_INT(lp, x) do {                     \
 167        unsigned int  __mask;                           \
 168        __mask = SMC_GET_INT_EN((lp));                  \
 169        __mask &= ~(x);                                 \
 170        SMC_SET_INT_EN((lp), __mask);                   \
 171} while (0)
 172
 173/*
 174 * this does a soft reset on the device
 175 */
 176static void smc911x_reset(struct net_device *dev)
 177{
 178        struct smc911x_local *lp = netdev_priv(dev);
 179        unsigned int reg, timeout=0, resets=1, irq_cfg;
 180        unsigned long flags;
 181
 182        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 183
 184        /*       Take out of PM setting first */
 185        if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
 186                /* Write to the bytetest will take out of powerdown */
 187                SMC_SET_BYTE_TEST(lp, 0);
 188                timeout=10;
 189                do {
 190                        udelay(10);
 191                        reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
 192                } while (--timeout && !reg);
 193                if (timeout == 0) {
 194                        PRINTK(dev, "smc911x_reset timeout waiting for PM restore\n");
 195                        return;
 196                }
 197        }
 198
 199        /* Disable all interrupts */
 200        spin_lock_irqsave(&lp->lock, flags);
 201        SMC_SET_INT_EN(lp, 0);
 202        spin_unlock_irqrestore(&lp->lock, flags);
 203
 204        while (resets--) {
 205                SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
 206                timeout=10;
 207                do {
 208                        udelay(10);
 209                        reg = SMC_GET_HW_CFG(lp);
 210                        /* If chip indicates reset timeout then try again */
 211                        if (reg & HW_CFG_SRST_TO_) {
 212                                PRINTK(dev, "chip reset timeout, retrying...\n");
 213                                resets++;
 214                                break;
 215                        }
 216                } while (--timeout && (reg & HW_CFG_SRST_));
 217        }
 218        if (timeout == 0) {
 219                PRINTK(dev, "smc911x_reset timeout waiting for reset\n");
 220                return;
 221        }
 222
 223        /* make sure EEPROM has finished loading before setting GPIO_CFG */
 224        timeout=1000;
 225        while (--timeout && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_))
 226                udelay(10);
 227
 228        if (timeout == 0){
 229                PRINTK(dev, "smc911x_reset timeout waiting for EEPROM busy\n");
 230                return;
 231        }
 232
 233        /* Initialize interrupts */
 234        SMC_SET_INT_EN(lp, 0);
 235        SMC_ACK_INT(lp, -1);
 236
 237        /* Reset the FIFO level and flow control settings */
 238        SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
 239//TODO: Figure out what appropriate pause time is
 240        SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
 241        SMC_SET_AFC_CFG(lp, lp->afc_cfg);
 242
 243
 244        /* Set to LED outputs */
 245        SMC_SET_GPIO_CFG(lp, 0x70070000);
 246
 247        /*
 248         * Deassert IRQ for 1*10us for edge type interrupts
 249         * and drive IRQ pin push-pull
 250         */
 251        irq_cfg = (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_;
 252#ifdef SMC_DYNAMIC_BUS_CONFIG
 253        if (lp->cfg.irq_polarity)
 254                irq_cfg |= INT_CFG_IRQ_POL_;
 255#endif
 256        SMC_SET_IRQ_CFG(lp, irq_cfg);
 257
 258        /* clear anything saved */
 259        if (lp->pending_tx_skb != NULL) {
 260                dev_kfree_skb (lp->pending_tx_skb);
 261                lp->pending_tx_skb = NULL;
 262                dev->stats.tx_errors++;
 263                dev->stats.tx_aborted_errors++;
 264        }
 265}
 266
 267/*
 268 * Enable Interrupts, Receive, and Transmit
 269 */
 270static void smc911x_enable(struct net_device *dev)
 271{
 272        struct smc911x_local *lp = netdev_priv(dev);
 273        unsigned mask, cfg, cr;
 274        unsigned long flags;
 275
 276        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 277
 278        spin_lock_irqsave(&lp->lock, flags);
 279
 280        SMC_SET_MAC_ADDR(lp, dev->dev_addr);
 281
 282        /* Enable TX */
 283        cfg = SMC_GET_HW_CFG(lp);
 284        cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
 285        cfg |= HW_CFG_SF_;
 286        SMC_SET_HW_CFG(lp, cfg);
 287        SMC_SET_FIFO_TDA(lp, 0xFF);
 288        /* Update TX stats on every 64 packets received or every 1 sec */
 289        SMC_SET_FIFO_TSL(lp, 64);
 290        SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
 291
 292        SMC_GET_MAC_CR(lp, cr);
 293        cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
 294        SMC_SET_MAC_CR(lp, cr);
 295        SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
 296
 297        /* Add 2 byte padding to start of packets */
 298        SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
 299
 300        /* Turn on receiver and enable RX */
 301        if (cr & MAC_CR_RXEN_)
 302                DBG(SMC_DEBUG_RX, dev, "Receiver already enabled\n");
 303
 304        SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
 305
 306        /* Interrupt on every received packet */
 307        SMC_SET_FIFO_RSA(lp, 0x01);
 308        SMC_SET_FIFO_RSL(lp, 0x00);
 309
 310        /* now, enable interrupts */
 311        mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
 312                INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
 313                INT_EN_PHY_INT_EN_;
 314        if (IS_REV_A(lp->revision))
 315                mask|=INT_EN_RDFL_EN_;
 316        else {
 317                mask|=INT_EN_RDFO_EN_;
 318        }
 319        SMC_ENABLE_INT(lp, mask);
 320
 321        spin_unlock_irqrestore(&lp->lock, flags);
 322}
 323
 324/*
 325 * this puts the device in an inactive state
 326 */
 327static void smc911x_shutdown(struct net_device *dev)
 328{
 329        struct smc911x_local *lp = netdev_priv(dev);
 330        unsigned cr;
 331        unsigned long flags;
 332
 333        DBG(SMC_DEBUG_FUNC, dev, "%s: --> %s\n", CARDNAME, __func__);
 334
 335        /* Disable IRQ's */
 336        SMC_SET_INT_EN(lp, 0);
 337
 338        /* Turn of Rx and TX */
 339        spin_lock_irqsave(&lp->lock, flags);
 340        SMC_GET_MAC_CR(lp, cr);
 341        cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
 342        SMC_SET_MAC_CR(lp, cr);
 343        SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
 344        spin_unlock_irqrestore(&lp->lock, flags);
 345}
 346
 347static inline void smc911x_drop_pkt(struct net_device *dev)
 348{
 349        struct smc911x_local *lp = netdev_priv(dev);
 350        unsigned int fifo_count, timeout, reg;
 351
 352        DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "%s: --> %s\n",
 353            CARDNAME, __func__);
 354        fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
 355        if (fifo_count <= 4) {
 356                /* Manually dump the packet data */
 357                while (fifo_count--)
 358                        SMC_GET_RX_FIFO(lp);
 359        } else   {
 360                /* Fast forward through the bad packet */
 361                SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
 362                timeout=50;
 363                do {
 364                        udelay(10);
 365                        reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
 366                } while (--timeout && reg);
 367                if (timeout == 0) {
 368                        PRINTK(dev, "timeout waiting for RX fast forward\n");
 369                }
 370        }
 371}
 372
 373/*
 374 * This is the procedure to handle the receipt of a packet.
 375 * It should be called after checking for packet presence in
 376 * the RX status FIFO.   It must be called with the spin lock
 377 * already held.
 378 */
 379static inline void       smc911x_rcv(struct net_device *dev)
 380{
 381        struct smc911x_local *lp = netdev_priv(dev);
 382        unsigned int pkt_len, status;
 383        struct sk_buff *skb;
 384        unsigned char *data;
 385
 386        DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "--> %s\n",
 387            __func__);
 388        status = SMC_GET_RX_STS_FIFO(lp);
 389        DBG(SMC_DEBUG_RX, dev, "Rx pkt len %d status 0x%08x\n",
 390            (status & 0x3fff0000) >> 16, status & 0xc000ffff);
 391        pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
 392        if (status & RX_STS_ES_) {
 393                /* Deal with a bad packet */
 394                dev->stats.rx_errors++;
 395                if (status & RX_STS_CRC_ERR_)
 396                        dev->stats.rx_crc_errors++;
 397                else {
 398                        if (status & RX_STS_LEN_ERR_)
 399                                dev->stats.rx_length_errors++;
 400                        if (status & RX_STS_MCAST_)
 401                                dev->stats.multicast++;
 402                }
 403                /* Remove the bad packet data from the RX FIFO */
 404                smc911x_drop_pkt(dev);
 405        } else {
 406                /* Receive a valid packet */
 407                /* Alloc a buffer with extra room for DMA alignment */
 408                skb = netdev_alloc_skb(dev, pkt_len+32);
 409                if (unlikely(skb == NULL)) {
 410                        PRINTK(dev, "Low memory, rcvd packet dropped.\n");
 411                        dev->stats.rx_dropped++;
 412                        smc911x_drop_pkt(dev);
 413                        return;
 414                }
 415                /* Align IP header to 32 bits
 416                 * Note that the device is configured to add a 2
 417                 * byte padding to the packet start, so we really
 418                 * want to write to the orignal data pointer */
 419                data = skb->data;
 420                skb_reserve(skb, 2);
 421                skb_put(skb,pkt_len-4);
 422#ifdef SMC_USE_DMA
 423                {
 424                unsigned int fifo;
 425                /* Lower the FIFO threshold if possible */
 426                fifo = SMC_GET_FIFO_INT(lp);
 427                if (fifo & 0xFF) fifo--;
 428                DBG(SMC_DEBUG_RX, dev, "Setting RX stat FIFO threshold to %d\n",
 429                    fifo & 0xff);
 430                SMC_SET_FIFO_INT(lp, fifo);
 431                /* Setup RX DMA */
 432                SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
 433                lp->rxdma_active = 1;
 434                lp->current_rx_skb = skb;
 435                SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
 436                /* Packet processing deferred to DMA RX interrupt */
 437                }
 438#else
 439                SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
 440                SMC_PULL_DATA(lp, data, pkt_len+2+3);
 441
 442                DBG(SMC_DEBUG_PKTS, dev, "Received packet\n");
 443                PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
 444                skb->protocol = eth_type_trans(skb, dev);
 445                netif_rx(skb);
 446                dev->stats.rx_packets++;
 447                dev->stats.rx_bytes += pkt_len-4;
 448#endif
 449        }
 450}
 451
 452/*
 453 * This is called to actually send a packet to the chip.
 454 */
 455static void smc911x_hardware_send_pkt(struct net_device *dev)
 456{
 457        struct smc911x_local *lp = netdev_priv(dev);
 458        struct sk_buff *skb;
 459        unsigned int cmdA, cmdB, len;
 460        unsigned char *buf;
 461
 462        DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n", __func__);
 463        BUG_ON(lp->pending_tx_skb == NULL);
 464
 465        skb = lp->pending_tx_skb;
 466        lp->pending_tx_skb = NULL;
 467
 468        /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
 469        /* cmdB {31:16] pkt tag [10:0] length */
 470#ifdef SMC_USE_DMA
 471        /* 16 byte buffer alignment mode */
 472        buf = (char*)((u32)(skb->data) & ~0xF);
 473        len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
 474        cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
 475                        TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
 476                        skb->len;
 477#else
 478        buf = (char*)((u32)skb->data & ~0x3);
 479        len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
 480        cmdA = (((u32)skb->data & 0x3) << 16) |
 481                        TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
 482                        skb->len;
 483#endif
 484        /* tag is packet length so we can use this in stats update later */
 485        cmdB = (skb->len  << 16) | (skb->len & 0x7FF);
 486
 487        DBG(SMC_DEBUG_TX, dev, "TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
 488            len, len, buf, cmdA, cmdB);
 489        SMC_SET_TX_FIFO(lp, cmdA);
 490        SMC_SET_TX_FIFO(lp, cmdB);
 491
 492        DBG(SMC_DEBUG_PKTS, dev, "Transmitted packet\n");
 493        PRINT_PKT(buf, len <= 64 ? len : 64);
 494
 495        /* Send pkt via PIO or DMA */
 496#ifdef SMC_USE_DMA
 497        lp->current_tx_skb = skb;
 498        SMC_PUSH_DATA(lp, buf, len);
 499        /* DMA complete IRQ will free buffer and set jiffies */
 500#else
 501        SMC_PUSH_DATA(lp, buf, len);
 502        netif_trans_update(dev);
 503        dev_kfree_skb_irq(skb);
 504#endif
 505        if (!lp->tx_throttle) {
 506                netif_wake_queue(dev);
 507        }
 508        SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
 509}
 510
 511/*
 512 * Since I am not sure if I will have enough room in the chip's ram
 513 * to store the packet, I call this routine which either sends it
 514 * now, or set the card to generates an interrupt when ready
 515 * for the packet.
 516 */
 517static int smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 518{
 519        struct smc911x_local *lp = netdev_priv(dev);
 520        unsigned int free;
 521        unsigned long flags;
 522
 523        DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
 524            __func__);
 525
 526        spin_lock_irqsave(&lp->lock, flags);
 527
 528        BUG_ON(lp->pending_tx_skb != NULL);
 529
 530        free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
 531        DBG(SMC_DEBUG_TX, dev, "TX free space %d\n", free);
 532
 533        /* Turn off the flow when running out of space in FIFO */
 534        if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
 535                DBG(SMC_DEBUG_TX, dev, "Disabling data flow due to low FIFO space (%d)\n",
 536                    free);
 537                /* Reenable when at least 1 packet of size MTU present */
 538                SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
 539                lp->tx_throttle = 1;
 540                netif_stop_queue(dev);
 541        }
 542
 543        /* Drop packets when we run out of space in TX FIFO
 544         * Account for overhead required for:
 545         *
 546         *        Tx command words                       8 bytes
 547         *        Start offset                           15 bytes
 548         *        End padding                            15 bytes
 549         */
 550        if (unlikely(free < (skb->len + 8 + 15 + 15))) {
 551                netdev_warn(dev, "No Tx free space %d < %d\n",
 552                            free, skb->len);
 553                lp->pending_tx_skb = NULL;
 554                dev->stats.tx_errors++;
 555                dev->stats.tx_dropped++;
 556                spin_unlock_irqrestore(&lp->lock, flags);
 557                dev_kfree_skb_any(skb);
 558                return NETDEV_TX_OK;
 559        }
 560
 561#ifdef SMC_USE_DMA
 562        {
 563                /* If the DMA is already running then defer this packet Tx until
 564                 * the DMA IRQ starts it
 565                 */
 566                if (lp->txdma_active) {
 567                        DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Tx DMA running, deferring packet\n");
 568                        lp->pending_tx_skb = skb;
 569                        netif_stop_queue(dev);
 570                        spin_unlock_irqrestore(&lp->lock, flags);
 571                        return NETDEV_TX_OK;
 572                } else {
 573                        DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Activating Tx DMA\n");
 574                        lp->txdma_active = 1;
 575                }
 576        }
 577#endif
 578        lp->pending_tx_skb = skb;
 579        smc911x_hardware_send_pkt(dev);
 580        spin_unlock_irqrestore(&lp->lock, flags);
 581
 582        return NETDEV_TX_OK;
 583}
 584
 585/*
 586 * This handles a TX status interrupt, which is only called when:
 587 * - a TX error occurred, or
 588 * - TX of a packet completed.
 589 */
 590static void smc911x_tx(struct net_device *dev)
 591{
 592        struct smc911x_local *lp = netdev_priv(dev);
 593        unsigned int tx_status;
 594
 595        DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
 596            __func__);
 597
 598        /* Collect the TX status */
 599        while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
 600                DBG(SMC_DEBUG_TX, dev, "Tx stat FIFO used 0x%04x\n",
 601                    (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
 602                tx_status = SMC_GET_TX_STS_FIFO(lp);
 603                dev->stats.tx_packets++;
 604                dev->stats.tx_bytes+=tx_status>>16;
 605                DBG(SMC_DEBUG_TX, dev, "Tx FIFO tag 0x%04x status 0x%04x\n",
 606                    (tx_status & 0xffff0000) >> 16,
 607                    tx_status & 0x0000ffff);
 608                /* count Tx errors, but ignore lost carrier errors when in
 609                 * full-duplex mode */
 610                if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
 611                    !(tx_status & 0x00000306))) {
 612                        dev->stats.tx_errors++;
 613                }
 614                if (tx_status & TX_STS_MANY_COLL_) {
 615                        dev->stats.collisions+=16;
 616                        dev->stats.tx_aborted_errors++;
 617                } else {
 618                        dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
 619                }
 620                /* carrier error only has meaning for half-duplex communication */
 621                if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
 622                    !lp->ctl_rfduplx) {
 623                        dev->stats.tx_carrier_errors++;
 624                }
 625                if (tx_status & TX_STS_LATE_COLL_) {
 626                        dev->stats.collisions++;
 627                        dev->stats.tx_aborted_errors++;
 628                }
 629        }
 630}
 631
 632
 633/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
 634/*
 635 * Reads a register from the MII Management serial interface
 636 */
 637
 638static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
 639{
 640        struct smc911x_local *lp = netdev_priv(dev);
 641        unsigned int phydata;
 642
 643        SMC_GET_MII(lp, phyreg, phyaddr, phydata);
 644
 645        DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
 646            __func__, phyaddr, phyreg, phydata);
 647        return phydata;
 648}
 649
 650
 651/*
 652 * Writes a register to the MII Management serial interface
 653 */
 654static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
 655                        int phydata)
 656{
 657        struct smc911x_local *lp = netdev_priv(dev);
 658
 659        DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
 660            __func__, phyaddr, phyreg, phydata);
 661
 662        SMC_SET_MII(lp, phyreg, phyaddr, phydata);
 663}
 664
 665/*
 666 * Finds and reports the PHY address (115 and 117 have external
 667 * PHY interface 118 has internal only
 668 */
 669static void smc911x_phy_detect(struct net_device *dev)
 670{
 671        struct smc911x_local *lp = netdev_priv(dev);
 672        int phyaddr;
 673        unsigned int cfg, id1, id2;
 674
 675        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 676
 677        lp->phy_type = 0;
 678
 679        /*
 680         * Scan all 32 PHY addresses if necessary, starting at
 681         * PHY#1 to PHY#31, and then PHY#0 last.
 682         */
 683        switch(lp->version) {
 684                case CHIP_9115:
 685                case CHIP_9117:
 686                case CHIP_9215:
 687                case CHIP_9217:
 688                        cfg = SMC_GET_HW_CFG(lp);
 689                        if (cfg & HW_CFG_EXT_PHY_DET_) {
 690                                cfg &= ~HW_CFG_PHY_CLK_SEL_;
 691                                cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
 692                                SMC_SET_HW_CFG(lp, cfg);
 693                                udelay(10); /* Wait for clocks to stop */
 694
 695                                cfg |= HW_CFG_EXT_PHY_EN_;
 696                                SMC_SET_HW_CFG(lp, cfg);
 697                                udelay(10); /* Wait for clocks to stop */
 698
 699                                cfg &= ~HW_CFG_PHY_CLK_SEL_;
 700                                cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
 701                                SMC_SET_HW_CFG(lp, cfg);
 702                                udelay(10); /* Wait for clocks to stop */
 703
 704                                cfg |= HW_CFG_SMI_SEL_;
 705                                SMC_SET_HW_CFG(lp, cfg);
 706
 707                                for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
 708
 709                                        /* Read the PHY identifiers */
 710                                        SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
 711                                        SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
 712
 713                                        /* Make sure it is a valid identifier */
 714                                        if (id1 != 0x0000 && id1 != 0xffff &&
 715                                            id1 != 0x8000 && id2 != 0x0000 &&
 716                                            id2 != 0xffff && id2 != 0x8000) {
 717                                                /* Save the PHY's address */
 718                                                lp->mii.phy_id = phyaddr & 31;
 719                                                lp->phy_type = id1 << 16 | id2;
 720                                                break;
 721                                        }
 722                                }
 723                                if (phyaddr < 32)
 724                                        /* Found an external PHY */
 725                                        break;
 726                        }
 727                default:
 728                        /* Internal media only */
 729                        SMC_GET_PHY_ID1(lp, 1, id1);
 730                        SMC_GET_PHY_ID2(lp, 1, id2);
 731                        /* Save the PHY's address */
 732                        lp->mii.phy_id = 1;
 733                        lp->phy_type = id1 << 16 | id2;
 734        }
 735
 736        DBG(SMC_DEBUG_MISC, dev, "phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%x\n",
 737            id1, id2, lp->mii.phy_id);
 738}
 739
 740/*
 741 * Sets the PHY to a configuration as determined by the user.
 742 * Called with spin_lock held.
 743 */
 744static int smc911x_phy_fixed(struct net_device *dev)
 745{
 746        struct smc911x_local *lp = netdev_priv(dev);
 747        int phyaddr = lp->mii.phy_id;
 748        int bmcr;
 749
 750        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 751
 752        /* Enter Link Disable state */
 753        SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
 754        bmcr |= BMCR_PDOWN;
 755        SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 756
 757        /*
 758         * Set our fixed capabilities
 759         * Disable auto-negotiation
 760         */
 761        bmcr &= ~BMCR_ANENABLE;
 762        if (lp->ctl_rfduplx)
 763                bmcr |= BMCR_FULLDPLX;
 764
 765        if (lp->ctl_rspeed == 100)
 766                bmcr |= BMCR_SPEED100;
 767
 768        /* Write our capabilities to the phy control register */
 769        SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 770
 771        /* Re-Configure the Receive/Phy Control register */
 772        bmcr &= ~BMCR_PDOWN;
 773        SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 774
 775        return 1;
 776}
 777
 778/**
 779 * smc911x_phy_reset - reset the phy
 780 * @dev: net device
 781 * @phy: phy address
 782 *
 783 * Issue a software reset for the specified PHY and
 784 * wait up to 100ms for the reset to complete.   We should
 785 * not access the PHY for 50ms after issuing the reset.
 786 *
 787 * The time to wait appears to be dependent on the PHY.
 788 *
 789 */
 790static int smc911x_phy_reset(struct net_device *dev, int phy)
 791{
 792        struct smc911x_local *lp = netdev_priv(dev);
 793        int timeout;
 794        unsigned long flags;
 795        unsigned int reg;
 796
 797        DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
 798
 799        spin_lock_irqsave(&lp->lock, flags);
 800        reg = SMC_GET_PMT_CTRL(lp);
 801        reg &= ~0xfffff030;
 802        reg |= PMT_CTRL_PHY_RST_;
 803        SMC_SET_PMT_CTRL(lp, reg);
 804        spin_unlock_irqrestore(&lp->lock, flags);
 805        for (timeout = 2; timeout; timeout--) {
 806                msleep(50);
 807                spin_lock_irqsave(&lp->lock, flags);
 808                reg = SMC_GET_PMT_CTRL(lp);
 809                spin_unlock_irqrestore(&lp->lock, flags);
 810                if (!(reg & PMT_CTRL_PHY_RST_)) {
 811                        /* extra delay required because the phy may
 812                         * not be completed with its reset
 813                         * when PHY_BCR_RESET_ is cleared. 256us
 814                         * should suffice, but use 500us to be safe
 815                         */
 816                        udelay(500);
 817                break;
 818                }
 819        }
 820
 821        return reg & PMT_CTRL_PHY_RST_;
 822}
 823
 824/**
 825 * smc911x_phy_powerdown - powerdown phy
 826 * @dev: net device
 827 * @phy: phy address
 828 *
 829 * Power down the specified PHY
 830 */
 831static void smc911x_phy_powerdown(struct net_device *dev, int phy)
 832{
 833        struct smc911x_local *lp = netdev_priv(dev);
 834        unsigned int bmcr;
 835
 836        /* Enter Link Disable state */
 837        SMC_GET_PHY_BMCR(lp, phy, bmcr);
 838        bmcr |= BMCR_PDOWN;
 839        SMC_SET_PHY_BMCR(lp, phy, bmcr);
 840}
 841
 842/**
 843 * smc911x_phy_check_media - check the media status and adjust BMCR
 844 * @dev: net device
 845 * @init: set true for initialisation
 846 *
 847 * Select duplex mode depending on negotiation state.   This
 848 * also updates our carrier state.
 849 */
 850static void smc911x_phy_check_media(struct net_device *dev, int init)
 851{
 852        struct smc911x_local *lp = netdev_priv(dev);
 853        int phyaddr = lp->mii.phy_id;
 854        unsigned int bmcr, cr;
 855
 856        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 857
 858        if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
 859                /* duplex state has changed */
 860                SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
 861                SMC_GET_MAC_CR(lp, cr);
 862                if (lp->mii.full_duplex) {
 863                        DBG(SMC_DEBUG_MISC, dev, "Configuring for full-duplex mode\n");
 864                        bmcr |= BMCR_FULLDPLX;
 865                        cr |= MAC_CR_RCVOWN_;
 866                } else {
 867                        DBG(SMC_DEBUG_MISC, dev, "Configuring for half-duplex mode\n");
 868                        bmcr &= ~BMCR_FULLDPLX;
 869                        cr &= ~MAC_CR_RCVOWN_;
 870                }
 871                SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 872                SMC_SET_MAC_CR(lp, cr);
 873        }
 874}
 875
 876/*
 877 * Configures the specified PHY through the MII management interface
 878 * using Autonegotiation.
 879 * Calls smc911x_phy_fixed() if the user has requested a certain config.
 880 * If RPC ANEG bit is set, the media selection is dependent purely on
 881 * the selection by the MII (either in the MII BMCR reg or the result
 882 * of autonegotiation.)  If the RPC ANEG bit is cleared, the selection
 883 * is controlled by the RPC SPEED and RPC DPLX bits.
 884 */
 885static void smc911x_phy_configure(struct work_struct *work)
 886{
 887        struct smc911x_local *lp = container_of(work, struct smc911x_local,
 888                                                phy_configure);
 889        struct net_device *dev = lp->netdev;
 890        int phyaddr = lp->mii.phy_id;
 891        int my_phy_caps; /* My PHY capabilities */
 892        int my_ad_caps; /* My Advertised capabilities */
 893        int status;
 894        unsigned long flags;
 895
 896        DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
 897
 898        /*
 899         * We should not be called if phy_type is zero.
 900         */
 901        if (lp->phy_type == 0)
 902                return;
 903
 904        if (smc911x_phy_reset(dev, phyaddr)) {
 905                netdev_info(dev, "PHY reset timed out\n");
 906                return;
 907        }
 908        spin_lock_irqsave(&lp->lock, flags);
 909
 910        /*
 911         * Enable PHY Interrupts (for register 18)
 912         * Interrupts listed here are enabled
 913         */
 914        SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
 915                 PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
 916                 PHY_INT_MASK_LINK_DOWN_);
 917
 918        /* If the user requested no auto neg, then go set his request */
 919        if (lp->mii.force_media) {
 920                smc911x_phy_fixed(dev);
 921                goto smc911x_phy_configure_exit;
 922        }
 923
 924        /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
 925        SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
 926        if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
 927                netdev_info(dev, "Auto negotiation NOT supported\n");
 928                smc911x_phy_fixed(dev);
 929                goto smc911x_phy_configure_exit;
 930        }
 931
 932        /* CSMA capable w/ both pauses */
 933        my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 934
 935        if (my_phy_caps & BMSR_100BASE4)
 936                my_ad_caps |= ADVERTISE_100BASE4;
 937        if (my_phy_caps & BMSR_100FULL)
 938                my_ad_caps |= ADVERTISE_100FULL;
 939        if (my_phy_caps & BMSR_100HALF)
 940                my_ad_caps |= ADVERTISE_100HALF;
 941        if (my_phy_caps & BMSR_10FULL)
 942                my_ad_caps |= ADVERTISE_10FULL;
 943        if (my_phy_caps & BMSR_10HALF)
 944                my_ad_caps |= ADVERTISE_10HALF;
 945
 946        /* Disable capabilities not selected by our user */
 947        if (lp->ctl_rspeed != 100)
 948                my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
 949
 950         if (!lp->ctl_rfduplx)
 951                my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
 952
 953        /* Update our Auto-Neg Advertisement Register */
 954        SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
 955        lp->mii.advertising = my_ad_caps;
 956
 957        /*
 958         * Read the register back.       Without this, it appears that when
 959         * auto-negotiation is restarted, sometimes it isn't ready and
 960         * the link does not come up.
 961         */
 962        udelay(10);
 963        SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
 964
 965        DBG(SMC_DEBUG_MISC, dev, "phy caps=0x%04x\n", my_phy_caps);
 966        DBG(SMC_DEBUG_MISC, dev, "phy advertised caps=0x%04x\n", my_ad_caps);
 967
 968        /* Restart auto-negotiation process in order to advertise my caps */
 969        SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
 970
 971        smc911x_phy_check_media(dev, 1);
 972
 973smc911x_phy_configure_exit:
 974        spin_unlock_irqrestore(&lp->lock, flags);
 975}
 976
 977/*
 978 * smc911x_phy_interrupt
 979 *
 980 * Purpose:  Handle interrupts relating to PHY register 18. This is
 981 *       called from the "hard" interrupt handler under our private spinlock.
 982 */
 983static void smc911x_phy_interrupt(struct net_device *dev)
 984{
 985        struct smc911x_local *lp = netdev_priv(dev);
 986        int phyaddr = lp->mii.phy_id;
 987        int status;
 988
 989        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 990
 991        if (lp->phy_type == 0)
 992                return;
 993
 994        smc911x_phy_check_media(dev, 0);
 995        /* read to clear status bits */
 996        SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
 997        DBG(SMC_DEBUG_MISC, dev, "PHY interrupt status 0x%04x\n",
 998            status & 0xffff);
 999        DBG(SMC_DEBUG_MISC, dev, "AFC_CFG 0x%08x\n",
1000            SMC_GET_AFC_CFG(lp));
1001}
1002
1003/*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
1004
1005/*
1006 * This is the main routine of the driver, to handle the device when
1007 * it needs some attention.
1008 */
1009static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
1010{
1011        struct net_device *dev = dev_id;
1012        struct smc911x_local *lp = netdev_priv(dev);
1013        unsigned int status, mask, timeout;
1014        unsigned int rx_overrun=0, cr, pkts;
1015        unsigned long flags;
1016
1017        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1018
1019        spin_lock_irqsave(&lp->lock, flags);
1020
1021        /* Spurious interrupt check */
1022        if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1023                (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1024                spin_unlock_irqrestore(&lp->lock, flags);
1025                return IRQ_NONE;
1026        }
1027
1028        mask = SMC_GET_INT_EN(lp);
1029        SMC_SET_INT_EN(lp, 0);
1030
1031        /* set a timeout value, so I don't stay here forever */
1032        timeout = 8;
1033
1034
1035        do {
1036                status = SMC_GET_INT(lp);
1037
1038                DBG(SMC_DEBUG_MISC, dev, "INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1039                    status, mask, status & ~mask);
1040
1041                status &= mask;
1042                if (!status)
1043                        break;
1044
1045                /* Handle SW interrupt condition */
1046                if (status & INT_STS_SW_INT_) {
1047                        SMC_ACK_INT(lp, INT_STS_SW_INT_);
1048                        mask &= ~INT_EN_SW_INT_EN_;
1049                }
1050                /* Handle various error conditions */
1051                if (status & INT_STS_RXE_) {
1052                        SMC_ACK_INT(lp, INT_STS_RXE_);
1053                        dev->stats.rx_errors++;
1054                }
1055                if (status & INT_STS_RXDFH_INT_) {
1056                        SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1057                        dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1058                 }
1059                /* Undocumented interrupt-what is the right thing to do here? */
1060                if (status & INT_STS_RXDF_INT_) {
1061                        SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1062                }
1063
1064                /* Rx Data FIFO exceeds set level */
1065                if (status & INT_STS_RDFL_) {
1066                        if (IS_REV_A(lp->revision)) {
1067                                rx_overrun=1;
1068                                SMC_GET_MAC_CR(lp, cr);
1069                                cr &= ~MAC_CR_RXEN_;
1070                                SMC_SET_MAC_CR(lp, cr);
1071                                DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1072                                dev->stats.rx_errors++;
1073                                dev->stats.rx_fifo_errors++;
1074                        }
1075                        SMC_ACK_INT(lp, INT_STS_RDFL_);
1076                }
1077                if (status & INT_STS_RDFO_) {
1078                        if (!IS_REV_A(lp->revision)) {
1079                                SMC_GET_MAC_CR(lp, cr);
1080                                cr &= ~MAC_CR_RXEN_;
1081                                SMC_SET_MAC_CR(lp, cr);
1082                                rx_overrun=1;
1083                                DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1084                                dev->stats.rx_errors++;
1085                                dev->stats.rx_fifo_errors++;
1086                        }
1087                        SMC_ACK_INT(lp, INT_STS_RDFO_);
1088                }
1089                /* Handle receive condition */
1090                if ((status & INT_STS_RSFL_) || rx_overrun) {
1091                        unsigned int fifo;
1092                        DBG(SMC_DEBUG_RX, dev, "RX irq\n");
1093                        fifo = SMC_GET_RX_FIFO_INF(lp);
1094                        pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1095                        DBG(SMC_DEBUG_RX, dev, "Rx FIFO pkts %d, bytes %d\n",
1096                            pkts, fifo & 0xFFFF);
1097                        if (pkts != 0) {
1098#ifdef SMC_USE_DMA
1099                                unsigned int fifo;
1100                                if (lp->rxdma_active){
1101                                        DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1102                                            "RX DMA active\n");
1103                                        /* The DMA is already running so up the IRQ threshold */
1104                                        fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1105                                        fifo |= pkts & 0xFF;
1106                                        DBG(SMC_DEBUG_RX, dev,
1107                                            "Setting RX stat FIFO threshold to %d\n",
1108                                            fifo & 0xff);
1109                                        SMC_SET_FIFO_INT(lp, fifo);
1110                                } else
1111#endif
1112                                smc911x_rcv(dev);
1113                        }
1114                        SMC_ACK_INT(lp, INT_STS_RSFL_);
1115                }
1116                /* Handle transmit FIFO available */
1117                if (status & INT_STS_TDFA_) {
1118                        DBG(SMC_DEBUG_TX, dev, "TX data FIFO space available irq\n");
1119                        SMC_SET_FIFO_TDA(lp, 0xFF);
1120                        lp->tx_throttle = 0;
1121#ifdef SMC_USE_DMA
1122                        if (!lp->txdma_active)
1123#endif
1124                                netif_wake_queue(dev);
1125                        SMC_ACK_INT(lp, INT_STS_TDFA_);
1126                }
1127                /* Handle transmit done condition */
1128#if 1
1129                if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1130                        DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC, dev,
1131                            "Tx stat FIFO limit (%d) /GPT irq\n",
1132                            (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1133                        smc911x_tx(dev);
1134                        SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1135                        SMC_ACK_INT(lp, INT_STS_TSFL_);
1136                        SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1137                }
1138#else
1139                if (status & INT_STS_TSFL_) {
1140                        DBG(SMC_DEBUG_TX, dev, "TX status FIFO limit (%d) irq\n", ?);
1141                        smc911x_tx(dev);
1142                        SMC_ACK_INT(lp, INT_STS_TSFL_);
1143                }
1144
1145                if (status & INT_STS_GPT_INT_) {
1146                        DBG(SMC_DEBUG_RX, dev, "IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1147                            SMC_GET_IRQ_CFG(lp),
1148                            SMC_GET_FIFO_INT(lp),
1149                            SMC_GET_RX_CFG(lp));
1150                        DBG(SMC_DEBUG_RX, dev, "Rx Stat FIFO Used 0x%02x Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1151                            (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1152                            SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1153                            SMC_GET_RX_STS_FIFO_PEEK(lp));
1154                        SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1155                        SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1156                }
1157#endif
1158
1159                /* Handle PHY interrupt condition */
1160                if (status & INT_STS_PHY_INT_) {
1161                        DBG(SMC_DEBUG_MISC, dev, "PHY irq\n");
1162                        smc911x_phy_interrupt(dev);
1163                        SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1164                }
1165        } while (--timeout);
1166
1167        /* restore mask state */
1168        SMC_SET_INT_EN(lp, mask);
1169
1170        DBG(SMC_DEBUG_MISC, dev, "Interrupt done (%d loops)\n",
1171            8-timeout);
1172
1173        spin_unlock_irqrestore(&lp->lock, flags);
1174
1175        return IRQ_HANDLED;
1176}
1177
1178#ifdef SMC_USE_DMA
1179static void
1180smc911x_tx_dma_irq(void *data)
1181{
1182        struct smc911x_local *lp = data;
1183        struct net_device *dev = lp->netdev;
1184        struct sk_buff *skb = lp->current_tx_skb;
1185        unsigned long flags;
1186
1187        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1188
1189        DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "TX DMA irq handler\n");
1190        BUG_ON(skb == NULL);
1191        dma_unmap_single(NULL, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1192        netif_trans_update(dev);
1193        dev_kfree_skb_irq(skb);
1194        lp->current_tx_skb = NULL;
1195        if (lp->pending_tx_skb != NULL)
1196                smc911x_hardware_send_pkt(dev);
1197        else {
1198                DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1199                    "No pending Tx packets. DMA disabled\n");
1200                spin_lock_irqsave(&lp->lock, flags);
1201                lp->txdma_active = 0;
1202                if (!lp->tx_throttle) {
1203                        netif_wake_queue(dev);
1204                }
1205                spin_unlock_irqrestore(&lp->lock, flags);
1206        }
1207
1208        DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1209            "TX DMA irq completed\n");
1210}
1211static void
1212smc911x_rx_dma_irq(void *data)
1213{
1214        struct smc911x_local *lp = data;
1215        struct net_device *dev = lp->netdev;
1216        struct sk_buff *skb = lp->current_rx_skb;
1217        unsigned long flags;
1218        unsigned int pkts;
1219
1220        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1221        DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev, "RX DMA irq handler\n");
1222        dma_unmap_single(NULL, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1223        BUG_ON(skb == NULL);
1224        lp->current_rx_skb = NULL;
1225        PRINT_PKT(skb->data, skb->len);
1226        skb->protocol = eth_type_trans(skb, dev);
1227        dev->stats.rx_packets++;
1228        dev->stats.rx_bytes += skb->len;
1229        netif_rx(skb);
1230
1231        spin_lock_irqsave(&lp->lock, flags);
1232        pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1233        if (pkts != 0) {
1234                smc911x_rcv(dev);
1235        }else {
1236                lp->rxdma_active = 0;
1237        }
1238        spin_unlock_irqrestore(&lp->lock, flags);
1239        DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1240            "RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1241            pkts);
1242}
1243#endif   /* SMC_USE_DMA */
1244
1245#ifdef CONFIG_NET_POLL_CONTROLLER
1246/*
1247 * Polling receive - used by netconsole and other diagnostic tools
1248 * to allow network i/o with interrupts disabled.
1249 */
1250static void smc911x_poll_controller(struct net_device *dev)
1251{
1252        disable_irq(dev->irq);
1253        smc911x_interrupt(dev->irq, dev);
1254        enable_irq(dev->irq);
1255}
1256#endif
1257
1258/* Our watchdog timed out. Called by the networking layer */
1259static void smc911x_timeout(struct net_device *dev)
1260{
1261        struct smc911x_local *lp = netdev_priv(dev);
1262        int status, mask;
1263        unsigned long flags;
1264
1265        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1266
1267        spin_lock_irqsave(&lp->lock, flags);
1268        status = SMC_GET_INT(lp);
1269        mask = SMC_GET_INT_EN(lp);
1270        spin_unlock_irqrestore(&lp->lock, flags);
1271        DBG(SMC_DEBUG_MISC, dev, "INT 0x%02x MASK 0x%02x\n",
1272            status, mask);
1273
1274        /* Dump the current TX FIFO contents and restart */
1275        mask = SMC_GET_TX_CFG(lp);
1276        SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1277        /*
1278         * Reconfiguring the PHY doesn't seem like a bad idea here, but
1279         * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1280         * which calls schedule().       Hence we use a work queue.
1281         */
1282        if (lp->phy_type != 0)
1283                schedule_work(&lp->phy_configure);
1284
1285        /* We can accept TX packets again */
1286        netif_trans_update(dev); /* prevent tx timeout */
1287        netif_wake_queue(dev);
1288}
1289
1290/*
1291 * This routine will, depending on the values passed to it,
1292 * either make it accept multicast packets, go into
1293 * promiscuous mode (for TCPDUMP and cousins) or accept
1294 * a select set of multicast packets
1295 */
1296static void smc911x_set_multicast_list(struct net_device *dev)
1297{
1298        struct smc911x_local *lp = netdev_priv(dev);
1299        unsigned int multicast_table[2];
1300        unsigned int mcr, update_multicast = 0;
1301        unsigned long flags;
1302
1303        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1304
1305        spin_lock_irqsave(&lp->lock, flags);
1306        SMC_GET_MAC_CR(lp, mcr);
1307        spin_unlock_irqrestore(&lp->lock, flags);
1308
1309        if (dev->flags & IFF_PROMISC) {
1310
1311                DBG(SMC_DEBUG_MISC, dev, "RCR_PRMS\n");
1312                mcr |= MAC_CR_PRMS_;
1313        }
1314        /*
1315         * Here, I am setting this to accept all multicast packets.
1316         * I don't need to zero the multicast table, because the flag is
1317         * checked before the table is
1318         */
1319        else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1320                DBG(SMC_DEBUG_MISC, dev, "RCR_ALMUL\n");
1321                mcr |= MAC_CR_MCPAS_;
1322        }
1323
1324        /*
1325         * This sets the internal hardware table to filter out unwanted
1326         * multicast packets before they take up memory.
1327         *
1328         * The SMC chip uses a hash table where the high 6 bits of the CRC of
1329         * address are the offset into the table.       If that bit is 1, then the
1330         * multicast packet is accepted.  Otherwise, it's dropped silently.
1331         *
1332         * To use the 6 bits as an offset into the table, the high 1 bit is
1333         * the number of the 32 bit register, while the low 5 bits are the bit
1334         * within that register.
1335         */
1336        else if (!netdev_mc_empty(dev)) {
1337                struct netdev_hw_addr *ha;
1338
1339                /* Set the Hash perfec mode */
1340                mcr |= MAC_CR_HPFILT_;
1341
1342                /* start with a table of all zeros: reject all */
1343                memset(multicast_table, 0, sizeof(multicast_table));
1344
1345                netdev_for_each_mc_addr(ha, dev) {
1346                        u32 position;
1347
1348                        /* upper 6 bits are used as hash index */
1349                        position = ether_crc(ETH_ALEN, ha->addr)>>26;
1350
1351                        multicast_table[position>>5] |= 1 << (position&0x1f);
1352                }
1353
1354                /* be sure I get rid of flags I might have set */
1355                mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1356
1357                /* now, the table can be loaded into the chipset */
1358                update_multicast = 1;
1359        } else   {
1360                DBG(SMC_DEBUG_MISC, dev, "~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n");
1361                mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1362
1363                /*
1364                 * since I'm disabling all multicast entirely, I need to
1365                 * clear the multicast list
1366                 */
1367                memset(multicast_table, 0, sizeof(multicast_table));
1368                update_multicast = 1;
1369        }
1370
1371        spin_lock_irqsave(&lp->lock, flags);
1372        SMC_SET_MAC_CR(lp, mcr);
1373        if (update_multicast) {
1374                DBG(SMC_DEBUG_MISC, dev,
1375                    "update mcast hash table 0x%08x 0x%08x\n",
1376                    multicast_table[0], multicast_table[1]);
1377                SMC_SET_HASHL(lp, multicast_table[0]);
1378                SMC_SET_HASHH(lp, multicast_table[1]);
1379        }
1380        spin_unlock_irqrestore(&lp->lock, flags);
1381}
1382
1383
1384/*
1385 * Open and Initialize the board
1386 *
1387 * Set up everything, reset the card, etc..
1388 */
1389static int
1390smc911x_open(struct net_device *dev)
1391{
1392        struct smc911x_local *lp = netdev_priv(dev);
1393
1394        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1395
1396        /* reset the hardware */
1397        smc911x_reset(dev);
1398
1399        /* Configure the PHY, initialize the link state */
1400        smc911x_phy_configure(&lp->phy_configure);
1401
1402        /* Turn on Tx + Rx */
1403        smc911x_enable(dev);
1404
1405        netif_start_queue(dev);
1406
1407        return 0;
1408}
1409
1410/*
1411 * smc911x_close
1412 *
1413 * this makes the board clean up everything that it can
1414 * and not talk to the outside world.    Caused by
1415 * an 'ifconfig ethX down'
1416 */
1417static int smc911x_close(struct net_device *dev)
1418{
1419        struct smc911x_local *lp = netdev_priv(dev);
1420
1421        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1422
1423        netif_stop_queue(dev);
1424        netif_carrier_off(dev);
1425
1426        /* clear everything */
1427        smc911x_shutdown(dev);
1428
1429        if (lp->phy_type != 0) {
1430                /* We need to ensure that no calls to
1431                 * smc911x_phy_configure are pending.
1432                 */
1433                cancel_work_sync(&lp->phy_configure);
1434                smc911x_phy_powerdown(dev, lp->mii.phy_id);
1435        }
1436
1437        if (lp->pending_tx_skb) {
1438                dev_kfree_skb(lp->pending_tx_skb);
1439                lp->pending_tx_skb = NULL;
1440        }
1441
1442        return 0;
1443}
1444
1445/*
1446 * Ethtool support
1447 */
1448static int
1449smc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1450{
1451        struct smc911x_local *lp = netdev_priv(dev);
1452        int ret, status;
1453        unsigned long flags;
1454
1455        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1456        cmd->maxtxpkt = 1;
1457        cmd->maxrxpkt = 1;
1458
1459        if (lp->phy_type != 0) {
1460                spin_lock_irqsave(&lp->lock, flags);
1461                ret = mii_ethtool_gset(&lp->mii, cmd);
1462                spin_unlock_irqrestore(&lp->lock, flags);
1463        } else {
1464                cmd->supported = SUPPORTED_10baseT_Half |
1465                                SUPPORTED_10baseT_Full |
1466                                SUPPORTED_TP | SUPPORTED_AUI;
1467
1468                if (lp->ctl_rspeed == 10)
1469                        ethtool_cmd_speed_set(cmd, SPEED_10);
1470                else if (lp->ctl_rspeed == 100)
1471                        ethtool_cmd_speed_set(cmd, SPEED_100);
1472
1473                cmd->autoneg = AUTONEG_DISABLE;
1474                if (lp->mii.phy_id==1)
1475                        cmd->transceiver = XCVR_INTERNAL;
1476                else
1477                        cmd->transceiver = XCVR_EXTERNAL;
1478                cmd->port = 0;
1479                SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1480                cmd->duplex =
1481                        (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1482                                DUPLEX_FULL : DUPLEX_HALF;
1483                ret = 0;
1484        }
1485
1486        return ret;
1487}
1488
1489static int
1490smc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1491{
1492        struct smc911x_local *lp = netdev_priv(dev);
1493        int ret;
1494        unsigned long flags;
1495
1496        if (lp->phy_type != 0) {
1497                spin_lock_irqsave(&lp->lock, flags);
1498                ret = mii_ethtool_sset(&lp->mii, cmd);
1499                spin_unlock_irqrestore(&lp->lock, flags);
1500        } else {
1501                if (cmd->autoneg != AUTONEG_DISABLE ||
1502                        cmd->speed != SPEED_10 ||
1503                        (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) ||
1504                        (cmd->port != PORT_TP && cmd->port != PORT_AUI))
1505                        return -EINVAL;
1506
1507                lp->ctl_rfduplx = cmd->duplex == DUPLEX_FULL;
1508
1509                ret = 0;
1510        }
1511
1512        return ret;
1513}
1514
1515static void
1516smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1517{
1518        strlcpy(info->driver, CARDNAME, sizeof(info->driver));
1519        strlcpy(info->version, version, sizeof(info->version));
1520        strlcpy(info->bus_info, dev_name(dev->dev.parent),
1521                sizeof(info->bus_info));
1522}
1523
1524static int smc911x_ethtool_nwayreset(struct net_device *dev)
1525{
1526        struct smc911x_local *lp = netdev_priv(dev);
1527        int ret = -EINVAL;
1528        unsigned long flags;
1529
1530        if (lp->phy_type != 0) {
1531                spin_lock_irqsave(&lp->lock, flags);
1532                ret = mii_nway_restart(&lp->mii);
1533                spin_unlock_irqrestore(&lp->lock, flags);
1534        }
1535
1536        return ret;
1537}
1538
1539static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1540{
1541        struct smc911x_local *lp = netdev_priv(dev);
1542        return lp->msg_enable;
1543}
1544
1545static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1546{
1547        struct smc911x_local *lp = netdev_priv(dev);
1548        lp->msg_enable = level;
1549}
1550
1551static int smc911x_ethtool_getregslen(struct net_device *dev)
1552{
1553        /* System regs + MAC regs + PHY regs */
1554        return (((E2P_CMD - ID_REV)/4 + 1) +
1555                        (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1556}
1557
1558static void smc911x_ethtool_getregs(struct net_device *dev,
1559                                                                                 struct ethtool_regs* regs, void *buf)
1560{
1561        struct smc911x_local *lp = netdev_priv(dev);
1562        unsigned long flags;
1563        u32 reg,i,j=0;
1564        u32 *data = (u32*)buf;
1565
1566        regs->version = lp->version;
1567        for(i=ID_REV;i<=E2P_CMD;i+=4) {
1568                data[j++] = SMC_inl(lp, i);
1569        }
1570        for(i=MAC_CR;i<=WUCSR;i++) {
1571                spin_lock_irqsave(&lp->lock, flags);
1572                SMC_GET_MAC_CSR(lp, i, reg);
1573                spin_unlock_irqrestore(&lp->lock, flags);
1574                data[j++] = reg;
1575        }
1576        for(i=0;i<=31;i++) {
1577                spin_lock_irqsave(&lp->lock, flags);
1578                SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1579                spin_unlock_irqrestore(&lp->lock, flags);
1580                data[j++] = reg & 0xFFFF;
1581        }
1582}
1583
1584static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1585{
1586        struct smc911x_local *lp = netdev_priv(dev);
1587        unsigned int timeout;
1588        int e2p_cmd;
1589
1590        e2p_cmd = SMC_GET_E2P_CMD(lp);
1591        for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1592                if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1593                        PRINTK(dev, "%s timeout waiting for EEPROM to respond\n",
1594                               __func__);
1595                        return -EFAULT;
1596                }
1597                mdelay(1);
1598                e2p_cmd = SMC_GET_E2P_CMD(lp);
1599        }
1600        if (timeout == 0) {
1601                PRINTK(dev, "%s timeout waiting for EEPROM CMD not busy\n",
1602                       __func__);
1603                return -ETIMEDOUT;
1604        }
1605        return 0;
1606}
1607
1608static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1609                                                                                                        int cmd, int addr)
1610{
1611        struct smc911x_local *lp = netdev_priv(dev);
1612        int ret;
1613
1614        if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1615                return ret;
1616        SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1617                ((cmd) & (0x7<<28)) |
1618                ((addr) & 0xFF));
1619        return 0;
1620}
1621
1622static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1623                                                                                                        u8 *data)
1624{
1625        struct smc911x_local *lp = netdev_priv(dev);
1626        int ret;
1627
1628        if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1629                return ret;
1630        *data = SMC_GET_E2P_DATA(lp);
1631        return 0;
1632}
1633
1634static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1635                                                                                                         u8 data)
1636{
1637        struct smc911x_local *lp = netdev_priv(dev);
1638        int ret;
1639
1640        if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1641                return ret;
1642        SMC_SET_E2P_DATA(lp, data);
1643        return 0;
1644}
1645
1646static int smc911x_ethtool_geteeprom(struct net_device *dev,
1647                                                                          struct ethtool_eeprom *eeprom, u8 *data)
1648{
1649        u8 eebuf[SMC911X_EEPROM_LEN];
1650        int i, ret;
1651
1652        for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1653                if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1654                        return ret;
1655                if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1656                        return ret;
1657                }
1658        memcpy(data, eebuf+eeprom->offset, eeprom->len);
1659        return 0;
1660}
1661
1662static int smc911x_ethtool_seteeprom(struct net_device *dev,
1663                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1664{
1665        int i, ret;
1666
1667        /* Enable erase */
1668        if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1669                return ret;
1670        for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1671                /* erase byte */
1672                if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1673                        return ret;
1674                /* write byte */
1675                if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1676                         return ret;
1677                if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1678                        return ret;
1679                }
1680         return 0;
1681}
1682
1683static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1684{
1685         return SMC911X_EEPROM_LEN;
1686}
1687
1688static const struct ethtool_ops smc911x_ethtool_ops = {
1689        .get_settings    = smc911x_ethtool_getsettings,
1690        .set_settings    = smc911x_ethtool_setsettings,
1691        .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1692        .get_msglevel    = smc911x_ethtool_getmsglevel,
1693        .set_msglevel    = smc911x_ethtool_setmsglevel,
1694        .nway_reset = smc911x_ethtool_nwayreset,
1695        .get_link        = ethtool_op_get_link,
1696        .get_regs_len    = smc911x_ethtool_getregslen,
1697        .get_regs        = smc911x_ethtool_getregs,
1698        .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1699        .get_eeprom = smc911x_ethtool_geteeprom,
1700        .set_eeprom = smc911x_ethtool_seteeprom,
1701};
1702
1703/*
1704 * smc911x_findirq
1705 *
1706 * This routine has a simple purpose -- make the SMC chip generate an
1707 * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1708 */
1709static int smc911x_findirq(struct net_device *dev)
1710{
1711        struct smc911x_local *lp = netdev_priv(dev);
1712        int timeout = 20;
1713        unsigned long cookie;
1714
1715        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1716
1717        cookie = probe_irq_on();
1718
1719        /*
1720         * Force a SW interrupt
1721         */
1722
1723        SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1724
1725        /*
1726         * Wait until positive that the interrupt has been generated
1727         */
1728        do {
1729                int int_status;
1730                udelay(10);
1731                int_status = SMC_GET_INT_EN(lp);
1732                if (int_status & INT_EN_SW_INT_EN_)
1733                         break;         /* got the interrupt */
1734        } while (--timeout);
1735
1736        /*
1737         * there is really nothing that I can do here if timeout fails,
1738         * as autoirq_report will return a 0 anyway, which is what I
1739         * want in this case.    Plus, the clean up is needed in both
1740         * cases.
1741         */
1742
1743        /* and disable all interrupts again */
1744        SMC_SET_INT_EN(lp, 0);
1745
1746        /* and return what I found */
1747        return probe_irq_off(cookie);
1748}
1749
1750static const struct net_device_ops smc911x_netdev_ops = {
1751        .ndo_open               = smc911x_open,
1752        .ndo_stop               = smc911x_close,
1753        .ndo_start_xmit         = smc911x_hard_start_xmit,
1754        .ndo_tx_timeout         = smc911x_timeout,
1755        .ndo_set_rx_mode        = smc911x_set_multicast_list,
1756        .ndo_change_mtu         = eth_change_mtu,
1757        .ndo_validate_addr      = eth_validate_addr,
1758        .ndo_set_mac_address    = eth_mac_addr,
1759#ifdef CONFIG_NET_POLL_CONTROLLER
1760        .ndo_poll_controller    = smc911x_poll_controller,
1761#endif
1762};
1763
1764/*
1765 * Function: smc911x_probe(unsigned long ioaddr)
1766 *
1767 * Purpose:
1768 *       Tests to see if a given ioaddr points to an SMC911x chip.
1769 *       Returns a 0 on success
1770 *
1771 * Algorithm:
1772 *       (1) see if the endian word is OK
1773 *       (1) see if I recognize the chip ID in the appropriate register
1774 *
1775 * Here I do typical initialization tasks.
1776 *
1777 * o  Initialize the structure if needed
1778 * o  print out my vanity message if not done so already
1779 * o  print out what type of hardware is detected
1780 * o  print out the ethernet address
1781 * o  find the IRQ
1782 * o  set up my private data
1783 * o  configure the dev structure with my subroutines
1784 * o  actually GRAB the irq.
1785 * o  GRAB the region
1786 */
1787static int smc911x_probe(struct net_device *dev)
1788{
1789        struct smc911x_local *lp = netdev_priv(dev);
1790        int i, retval;
1791        unsigned int val, chip_id, revision;
1792        const char *version_string;
1793        unsigned long irq_flags;
1794#ifdef SMC_USE_DMA
1795        struct dma_slave_config config;
1796        dma_cap_mask_t mask;
1797        struct pxad_param param;
1798#endif
1799
1800        DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1801
1802        /* First, see if the endian word is recognized */
1803        val = SMC_GET_BYTE_TEST(lp);
1804        DBG(SMC_DEBUG_MISC, dev, "%s: endian probe returned 0x%04x\n",
1805            CARDNAME, val);
1806        if (val != 0x87654321) {
1807                netdev_err(dev, "Invalid chip endian 0x%08x\n", val);
1808                retval = -ENODEV;
1809                goto err_out;
1810        }
1811
1812        /*
1813         * check if the revision register is something that I
1814         * recognize.   These might need to be added to later,
1815         * as future revisions could be added.
1816         */
1817        chip_id = SMC_GET_PN(lp);
1818        DBG(SMC_DEBUG_MISC, dev, "%s: id probe returned 0x%04x\n",
1819            CARDNAME, chip_id);
1820        for(i=0;chip_ids[i].id != 0; i++) {
1821                if (chip_ids[i].id == chip_id) break;
1822        }
1823        if (!chip_ids[i].id) {
1824                netdev_err(dev, "Unknown chip ID %04x\n", chip_id);
1825                retval = -ENODEV;
1826                goto err_out;
1827        }
1828        version_string = chip_ids[i].name;
1829
1830        revision = SMC_GET_REV(lp);
1831        DBG(SMC_DEBUG_MISC, dev, "%s: revision = 0x%04x\n", CARDNAME, revision);
1832
1833        /* At this point I'll assume that the chip is an SMC911x. */
1834        DBG(SMC_DEBUG_MISC, dev, "%s: Found a %s\n",
1835            CARDNAME, chip_ids[i].name);
1836
1837        /* Validate the TX FIFO size requested */
1838        if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1839                netdev_err(dev, "Invalid TX FIFO size requested %d\n",
1840                           tx_fifo_kb);
1841                retval = -EINVAL;
1842                goto err_out;
1843        }
1844
1845        /* fill in some of the fields */
1846        lp->version = chip_ids[i].id;
1847        lp->revision = revision;
1848        lp->tx_fifo_kb = tx_fifo_kb;
1849        /* Reverse calculate the RX FIFO size from the TX */
1850        lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1851        lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1852
1853        /* Set the automatic flow control values */
1854        switch(lp->tx_fifo_kb) {
1855                /*
1856                 *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1857                 *       AFC_LO is AFC_HI/2
1858                 *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1859                 */
1860                case 2:/* 13440 Rx Data Fifo Size */
1861                        lp->afc_cfg=0x008C46AF;break;
1862                case 3:/* 12480 Rx Data Fifo Size */
1863                        lp->afc_cfg=0x0082419F;break;
1864                case 4:/* 11520 Rx Data Fifo Size */
1865                        lp->afc_cfg=0x00783C9F;break;
1866                case 5:/* 10560 Rx Data Fifo Size */
1867                        lp->afc_cfg=0x006E374F;break;
1868                case 6:/* 9600 Rx Data Fifo Size */
1869                        lp->afc_cfg=0x0064328F;break;
1870                case 7:/* 8640 Rx Data Fifo Size */
1871                        lp->afc_cfg=0x005A2D7F;break;
1872                case 8:/* 7680 Rx Data Fifo Size */
1873                        lp->afc_cfg=0x0050287F;break;
1874                case 9:/* 6720 Rx Data Fifo Size */
1875                        lp->afc_cfg=0x0046236F;break;
1876                case 10:/* 5760 Rx Data Fifo Size */
1877                        lp->afc_cfg=0x003C1E6F;break;
1878                case 11:/* 4800 Rx Data Fifo Size */
1879                        lp->afc_cfg=0x0032195F;break;
1880                /*
1881                 *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1882                 *       AFC_LO is AFC_HI/2
1883                 *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1884                 */
1885                case 12:/* 3840 Rx Data Fifo Size */
1886                        lp->afc_cfg=0x0024124F;break;
1887                case 13:/* 2880 Rx Data Fifo Size */
1888                        lp->afc_cfg=0x0015073F;break;
1889                case 14:/* 1920 Rx Data Fifo Size */
1890                        lp->afc_cfg=0x0006032F;break;
1891                 default:
1892                         PRINTK(dev, "ERROR -- no AFC_CFG setting found");
1893                         break;
1894        }
1895
1896        DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX, dev,
1897            "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1898            lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1899
1900        spin_lock_init(&lp->lock);
1901
1902        /* Get the MAC address */
1903        SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1904
1905        /* now, reset the chip, and put it into a known state */
1906        smc911x_reset(dev);
1907
1908        /*
1909         * If dev->irq is 0, then the device has to be banged on to see
1910         * what the IRQ is.
1911         *
1912         * Specifying an IRQ is done with the assumption that the user knows
1913         * what (s)he is doing.  No checking is done!!!!
1914         */
1915        if (dev->irq < 1) {
1916                int trials;
1917
1918                trials = 3;
1919                while (trials--) {
1920                        dev->irq = smc911x_findirq(dev);
1921                        if (dev->irq)
1922                                break;
1923                        /* kick the card and try again */
1924                        smc911x_reset(dev);
1925                }
1926        }
1927        if (dev->irq == 0) {
1928                netdev_warn(dev, "Couldn't autodetect your IRQ. Use irq=xx.\n");
1929                retval = -ENODEV;
1930                goto err_out;
1931        }
1932        dev->irq = irq_canonicalize(dev->irq);
1933
1934        dev->netdev_ops = &smc911x_netdev_ops;
1935        dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1936        dev->ethtool_ops = &smc911x_ethtool_ops;
1937
1938        INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1939        lp->mii.phy_id_mask = 0x1f;
1940        lp->mii.reg_num_mask = 0x1f;
1941        lp->mii.force_media = 0;
1942        lp->mii.full_duplex = 0;
1943        lp->mii.dev = dev;
1944        lp->mii.mdio_read = smc911x_phy_read;
1945        lp->mii.mdio_write = smc911x_phy_write;
1946
1947        /*
1948         * Locate the phy, if any.
1949         */
1950        smc911x_phy_detect(dev);
1951
1952        /* Set default parameters */
1953        lp->msg_enable = NETIF_MSG_LINK;
1954        lp->ctl_rfduplx = 1;
1955        lp->ctl_rspeed = 100;
1956
1957#ifdef SMC_DYNAMIC_BUS_CONFIG
1958        irq_flags = lp->cfg.irq_flags;
1959#else
1960        irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1961#endif
1962
1963        /* Grab the IRQ */
1964        retval = request_irq(dev->irq, smc911x_interrupt,
1965                             irq_flags, dev->name, dev);
1966        if (retval)
1967                goto err_out;
1968
1969#ifdef SMC_USE_DMA
1970
1971        dma_cap_zero(mask);
1972        dma_cap_set(DMA_SLAVE, mask);
1973        param.prio = PXAD_PRIO_LOWEST;
1974        param.drcmr = -1UL;
1975
1976        lp->rxdma =
1977                dma_request_slave_channel_compat(mask, pxad_filter_fn,
1978                                                 &param, &dev->dev, "rx");
1979        lp->txdma =
1980                dma_request_slave_channel_compat(mask, pxad_filter_fn,
1981                                                 &param, &dev->dev, "tx");
1982        lp->rxdma_active = 0;
1983        lp->txdma_active = 0;
1984
1985        memset(&config, 0, sizeof(config));
1986        config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1987        config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1988        config.src_addr = lp->physaddr + RX_DATA_FIFO;
1989        config.dst_addr = lp->physaddr + TX_DATA_FIFO;
1990        config.src_maxburst = 32;
1991        config.dst_maxburst = 32;
1992        retval = dmaengine_slave_config(lp->rxdma, &config);
1993        if (retval) {
1994                dev_err(lp->dev, "dma rx channel configuration failed: %d\n",
1995                        retval);
1996                goto err_out;
1997        }
1998        retval = dmaengine_slave_config(lp->txdma, &config);
1999        if (retval) {
2000                dev_err(lp->dev, "dma tx channel configuration failed: %d\n",
2001                        retval);
2002                goto err_out;
2003        }
2004#endif
2005
2006        retval = register_netdev(dev);
2007        if (retval == 0) {
2008                /* now, print out the card info, in a short format.. */
2009                netdev_info(dev, "%s (rev %d) at %#lx IRQ %d",
2010                            version_string, lp->revision,
2011                            dev->base_addr, dev->irq);
2012
2013#ifdef SMC_USE_DMA
2014                if (lp->rxdma)
2015                        pr_cont(" RXDMA %p", lp->rxdma);
2016
2017                if (lp->txdma)
2018                        pr_cont(" TXDMA %p", lp->txdma);
2019#endif
2020                pr_cont("\n");
2021                if (!is_valid_ether_addr(dev->dev_addr)) {
2022                        netdev_warn(dev, "Invalid ethernet MAC address. Please set using ifconfig\n");
2023                } else {
2024                        /* Print the Ethernet address */
2025                        netdev_info(dev, "Ethernet addr: %pM\n",
2026                                    dev->dev_addr);
2027                }
2028
2029                if (lp->phy_type == 0) {
2030                        PRINTK(dev, "No PHY found\n");
2031                } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2032                        PRINTK(dev, "LAN911x Internal PHY\n");
2033                } else {
2034                        PRINTK(dev, "External PHY 0x%08x\n", lp->phy_type);
2035                }
2036        }
2037
2038err_out:
2039#ifdef SMC_USE_DMA
2040        if (retval) {
2041                if (lp->rxdma)
2042                        dma_release_channel(lp->rxdma);
2043                if (lp->txdma)
2044                        dma_release_channel(lp->txdma);
2045        }
2046#endif
2047        return retval;
2048}
2049
2050/*
2051 * smc911x_drv_probe(void)
2052 *
2053 *        Output:
2054 *       0 --> there is a device
2055 *       anything else, error
2056 */
2057static int smc911x_drv_probe(struct platform_device *pdev)
2058{
2059        struct net_device *ndev;
2060        struct resource *res;
2061        struct smc911x_local *lp;
2062        void __iomem *addr;
2063        int ret;
2064
2065        /* ndev is not valid yet, so avoid passing it in. */
2066        DBG(SMC_DEBUG_FUNC, "--> %s\n",  __func__);
2067        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2068        if (!res) {
2069                ret = -ENODEV;
2070                goto out;
2071        }
2072
2073        /*
2074         * Request the regions.
2075         */
2076        if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2077                 ret = -EBUSY;
2078                 goto out;
2079        }
2080
2081        ndev = alloc_etherdev(sizeof(struct smc911x_local));
2082        if (!ndev) {
2083                ret = -ENOMEM;
2084                goto release_1;
2085        }
2086        SET_NETDEV_DEV(ndev, &pdev->dev);
2087
2088        ndev->dma = (unsigned char)-1;
2089        ndev->irq = platform_get_irq(pdev, 0);
2090        lp = netdev_priv(ndev);
2091        lp->netdev = ndev;
2092#ifdef SMC_DYNAMIC_BUS_CONFIG
2093        {
2094                struct smc911x_platdata *pd = dev_get_platdata(&pdev->dev);
2095                if (!pd) {
2096                        ret = -EINVAL;
2097                        goto release_both;
2098                }
2099                memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2100        }
2101#endif
2102
2103        addr = ioremap(res->start, SMC911X_IO_EXTENT);
2104        if (!addr) {
2105                ret = -ENOMEM;
2106                goto release_both;
2107        }
2108
2109        platform_set_drvdata(pdev, ndev);
2110        lp->base = addr;
2111        ndev->base_addr = res->start;
2112        ret = smc911x_probe(ndev);
2113        if (ret != 0) {
2114                iounmap(addr);
2115release_both:
2116                free_netdev(ndev);
2117release_1:
2118                release_mem_region(res->start, SMC911X_IO_EXTENT);
2119out:
2120                pr_info("%s: not found (%d).\n", CARDNAME, ret);
2121        }
2122#ifdef SMC_USE_DMA
2123        else {
2124                lp->physaddr = res->start;
2125                lp->dev = &pdev->dev;
2126        }
2127#endif
2128
2129        return ret;
2130}
2131
2132static int smc911x_drv_remove(struct platform_device *pdev)
2133{
2134        struct net_device *ndev = platform_get_drvdata(pdev);
2135        struct smc911x_local *lp = netdev_priv(ndev);
2136        struct resource *res;
2137
2138        DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2139
2140        unregister_netdev(ndev);
2141
2142        free_irq(ndev->irq, ndev);
2143
2144#ifdef SMC_USE_DMA
2145        {
2146                if (lp->rxdma)
2147                        dma_release_channel(lp->rxdma);
2148                if (lp->txdma)
2149                        dma_release_channel(lp->txdma);
2150        }
2151#endif
2152        iounmap(lp->base);
2153        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2154        release_mem_region(res->start, SMC911X_IO_EXTENT);
2155
2156        free_netdev(ndev);
2157        return 0;
2158}
2159
2160static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2161{
2162        struct net_device *ndev = platform_get_drvdata(dev);
2163        struct smc911x_local *lp = netdev_priv(ndev);
2164
2165        DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2166        if (ndev) {
2167                if (netif_running(ndev)) {
2168                        netif_device_detach(ndev);
2169                        smc911x_shutdown(ndev);
2170#if POWER_DOWN
2171                        /* Set D2 - Energy detect only setting */
2172                        SMC_SET_PMT_CTRL(lp, 2<<12);
2173#endif
2174                }
2175        }
2176        return 0;
2177}
2178
2179static int smc911x_drv_resume(struct platform_device *dev)
2180{
2181        struct net_device *ndev = platform_get_drvdata(dev);
2182
2183        DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2184        if (ndev) {
2185                struct smc911x_local *lp = netdev_priv(ndev);
2186
2187                if (netif_running(ndev)) {
2188                        smc911x_reset(ndev);
2189                        if (lp->phy_type != 0)
2190                                smc911x_phy_configure(&lp->phy_configure);
2191                        smc911x_enable(ndev);
2192                        netif_device_attach(ndev);
2193                }
2194        }
2195        return 0;
2196}
2197
2198static struct platform_driver smc911x_driver = {
2199        .probe           = smc911x_drv_probe,
2200        .remove  = smc911x_drv_remove,
2201        .suspend         = smc911x_drv_suspend,
2202        .resume  = smc911x_drv_resume,
2203        .driver  = {
2204                .name    = CARDNAME,
2205        },
2206};
2207
2208module_platform_driver(smc911x_driver);
2209