drivers/net/ethernet/smsc/smc911x.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
PRINT_PKT
smc911x_reset
smc911x_enable
smc911x_shutdown
smc911x_drop_pkt
smc911x_rcv
smc911x_hardware_send_pkt
smc911x_hard_start_xmit
smc911x_tx
smc911x_phy_read
smc911x_phy_write
smc911x_phy_detect
smc911x_phy_fixed
smc911x_phy_reset
smc911x_phy_powerdown
smc911x_phy_check_media
smc911x_phy_configure
smc911x_phy_interrupt
smc911x_interrupt
smc911x_tx_dma_irq
smc911x_rx_dma_irq
smc911x_poll_controller
smc911x_timeout
smc911x_set_multicast_list
smc911x_open
smc911x_close
smc911x_ethtool_get_link_ksettings
smc911x_ethtool_set_link_ksettings
smc911x_ethtool_getdrvinfo
smc911x_ethtool_nwayreset
smc911x_ethtool_getmsglevel
smc911x_ethtool_setmsglevel
smc911x_ethtool_getregslen
smc911x_ethtool_getregs
smc911x_ethtool_wait_eeprom_ready
smc911x_ethtool_write_eeprom_cmd
smc911x_ethtool_read_eeprom_byte
smc911x_ethtool_write_eeprom_byte
smc911x_ethtool_geteeprom
smc911x_ethtool_seteeprom
smc911x_ethtool_geteeprom_len
smc911x_findirq
smc911x_probe
smc911x_drv_probe
smc911x_drv_remove
smc911x_drv_suspend
smc911x_drv_resume
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * smc911x.c
   4  * This is a driver for SMSC's LAN911{5,6,7,8} single-chip Ethernet devices.
   5  *
   6  * Copyright (C) 2005 Sensoria Corp
   7  *         Derived from the unified SMC91x driver by Nicolas Pitre
   8  *         and the smsc911x.c reference driver by SMSC
   9  *
  10  * Arguments:
  11  *       watchdog  = TX watchdog timeout
  12  *       tx_fifo_kb = Size of TX FIFO in KB
  13  *
  14  * History:
  15  *        04/16/05      Dustin McIntire          Initial version
  16  */
  17 static const char version[] =
  18          "smc911x.c: v1.0 04-16-2005 by Dustin McIntire <dustin@sensoria.com>\n";
  19 
  20 /* Debugging options */
  21 #define ENABLE_SMC_DEBUG_RX             0
  22 #define ENABLE_SMC_DEBUG_TX             0
  23 #define ENABLE_SMC_DEBUG_DMA            0
  24 #define ENABLE_SMC_DEBUG_PKTS           0
  25 #define ENABLE_SMC_DEBUG_MISC           0
  26 #define ENABLE_SMC_DEBUG_FUNC           0
  27 
  28 #define SMC_DEBUG_RX            ((ENABLE_SMC_DEBUG_RX   ? 1 : 0) << 0)
  29 #define SMC_DEBUG_TX            ((ENABLE_SMC_DEBUG_TX   ? 1 : 0) << 1)
  30 #define SMC_DEBUG_DMA           ((ENABLE_SMC_DEBUG_DMA  ? 1 : 0) << 2)
  31 #define SMC_DEBUG_PKTS          ((ENABLE_SMC_DEBUG_PKTS ? 1 : 0) << 3)
  32 #define SMC_DEBUG_MISC          ((ENABLE_SMC_DEBUG_MISC ? 1 : 0) << 4)
  33 #define SMC_DEBUG_FUNC          ((ENABLE_SMC_DEBUG_FUNC ? 1 : 0) << 5)
  34 
  35 #ifndef SMC_DEBUG
  36 #define SMC_DEBUG        ( SMC_DEBUG_RX   | \
  37                            SMC_DEBUG_TX   | \
  38                            SMC_DEBUG_DMA  | \
  39                            SMC_DEBUG_PKTS | \
  40                            SMC_DEBUG_MISC | \
  41                            SMC_DEBUG_FUNC   \
  42                          )
  43 #endif
  44 
  45 #include <linux/module.h>
  46 #include <linux/kernel.h>
  47 #include <linux/sched.h>
  48 #include <linux/delay.h>
  49 #include <linux/interrupt.h>
  50 #include <linux/errno.h>
  51 #include <linux/ioport.h>
  52 #include <linux/crc32.h>
  53 #include <linux/device.h>
  54 #include <linux/platform_device.h>
  55 #include <linux/spinlock.h>
  56 #include <linux/ethtool.h>
  57 #include <linux/mii.h>
  58 #include <linux/workqueue.h>
  59 
  60 #include <linux/netdevice.h>
  61 #include <linux/etherdevice.h>
  62 #include <linux/skbuff.h>
  63 
  64 #include <linux/dmaengine.h>
  65 
  66 #include <asm/io.h>
  67 
  68 #include "smc911x.h"
  69 
  70 /*
  71  * Transmit timeout, default 5 seconds.
  72  */
  73 static int watchdog = 5000;
  74 module_param(watchdog, int, 0400);
  75 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
  76 
  77 static int tx_fifo_kb=8;
  78 module_param(tx_fifo_kb, int, 0400);
  79 MODULE_PARM_DESC(tx_fifo_kb,"transmit FIFO size in KB (1<x<15)(default=8)");
  80 
  81 MODULE_LICENSE("GPL");
  82 MODULE_ALIAS("platform:smc911x");
  83 
  84 /*
  85  * The internal workings of the driver.  If you are changing anything
  86  * here with the SMC stuff, you should have the datasheet and know
  87  * what you are doing.
  88  */
  89 #define CARDNAME "smc911x"
  90 
  91 /*
  92  * Use power-down feature of the chip
  93  */
  94 #define POWER_DOWN               1
  95 
  96 #if SMC_DEBUG > 0
  97 #define DBG(n, dev, args...)                     \
  98         do {                                     \
  99                 if (SMC_DEBUG & (n))             \
 100                         netdev_dbg(dev, args);   \
 101         } while (0)
 102 
 103 #define PRINTK(dev, args...)   netdev_info(dev, args)
 104 #else
 105 #define DBG(n, dev, args...)   do { } while (0)
 106 #define PRINTK(dev, args...)   netdev_dbg(dev, args)
 107 #endif
 108 
 109 #if SMC_DEBUG_PKTS > 0
 110 static void PRINT_PKT(u_char *buf, int length)
 111 {
 112         int i;
 113         int remainder;
 114         int lines;
 115 
 116         lines = length / 16;
 117         remainder = length % 16;
 118 
 119         for (i = 0; i < lines ; i ++) {
 120                 int cur;
 121                 printk(KERN_DEBUG);
 122                 for (cur = 0; cur < 8; cur++) {
 123                         u_char a, b;
 124                         a = *buf++;
 125                         b = *buf++;
 126                         pr_cont("%02x%02x ", a, b);
 127                 }
 128                 pr_cont("\n");
 129         }
 130         printk(KERN_DEBUG);
 131         for (i = 0; i < remainder/2 ; i++) {
 132                 u_char a, b;
 133                 a = *buf++;
 134                 b = *buf++;
 135                 pr_cont("%02x%02x ", a, b);
 136         }
 137         pr_cont("\n");
 138 }
 139 #else
 140 #define PRINT_PKT(x...)  do { } while (0)
 141 #endif
 142 
 143 
 144 /* this enables an interrupt in the interrupt mask register */
 145 #define SMC_ENABLE_INT(lp, x) do {                      \
 146         unsigned int  __mask;                           \
 147         __mask = SMC_GET_INT_EN((lp));                  \
 148         __mask |= (x);                                  \
 149         SMC_SET_INT_EN((lp), __mask);                   \
 150 } while (0)
 151 
 152 /* this disables an interrupt from the interrupt mask register */
 153 #define SMC_DISABLE_INT(lp, x) do {                     \
 154         unsigned int  __mask;                           \
 155         __mask = SMC_GET_INT_EN((lp));                  \
 156         __mask &= ~(x);                                 \
 157         SMC_SET_INT_EN((lp), __mask);                   \
 158 } while (0)
 159 
 160 /*
 161  * this does a soft reset on the device
 162  */
 163 static void smc911x_reset(struct net_device *dev)
 164 {
 165         struct smc911x_local *lp = netdev_priv(dev);
 166         unsigned int reg, timeout=0, resets=1, irq_cfg;
 167         unsigned long flags;
 168 
 169         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 170 
 171         /*       Take out of PM setting first */
 172         if ((SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_) == 0) {
 173                 /* Write to the bytetest will take out of powerdown */
 174                 SMC_SET_BYTE_TEST(lp, 0);
 175                 timeout=10;
 176                 do {
 177                         udelay(10);
 178                         reg = SMC_GET_PMT_CTRL(lp) & PMT_CTRL_READY_;
 179                 } while (--timeout && !reg);
 180                 if (timeout == 0) {
 181                         PRINTK(dev, "smc911x_reset timeout waiting for PM restore\n");
 182                         return;
 183                 }
 184         }
 185 
 186         /* Disable all interrupts */
 187         spin_lock_irqsave(&lp->lock, flags);
 188         SMC_SET_INT_EN(lp, 0);
 189         spin_unlock_irqrestore(&lp->lock, flags);
 190 
 191         while (resets--) {
 192                 SMC_SET_HW_CFG(lp, HW_CFG_SRST_);
 193                 timeout=10;
 194                 do {
 195                         udelay(10);
 196                         reg = SMC_GET_HW_CFG(lp);
 197                         /* If chip indicates reset timeout then try again */
 198                         if (reg & HW_CFG_SRST_TO_) {
 199                                 PRINTK(dev, "chip reset timeout, retrying...\n");
 200                                 resets++;
 201                                 break;
 202                         }
 203                 } while (--timeout && (reg & HW_CFG_SRST_));
 204         }
 205         if (timeout == 0) {
 206                 PRINTK(dev, "smc911x_reset timeout waiting for reset\n");
 207                 return;
 208         }
 209 
 210         /* make sure EEPROM has finished loading before setting GPIO_CFG */
 211         timeout=1000;
 212         while (--timeout && (SMC_GET_E2P_CMD(lp) & E2P_CMD_EPC_BUSY_))
 213                 udelay(10);
 214 
 215         if (timeout == 0){
 216                 PRINTK(dev, "smc911x_reset timeout waiting for EEPROM busy\n");
 217                 return;
 218         }
 219 
 220         /* Initialize interrupts */
 221         SMC_SET_INT_EN(lp, 0);
 222         SMC_ACK_INT(lp, -1);
 223 
 224         /* Reset the FIFO level and flow control settings */
 225         SMC_SET_HW_CFG(lp, (lp->tx_fifo_kb & 0xF) << 16);
 226 //TODO: Figure out what appropriate pause time is
 227         SMC_SET_FLOW(lp, FLOW_FCPT_ | FLOW_FCEN_);
 228         SMC_SET_AFC_CFG(lp, lp->afc_cfg);
 229 
 230 
 231         /* Set to LED outputs */
 232         SMC_SET_GPIO_CFG(lp, 0x70070000);
 233 
 234         /*
 235          * Deassert IRQ for 1*10us for edge type interrupts
 236          * and drive IRQ pin push-pull
 237          */
 238         irq_cfg = (1 << 24) | INT_CFG_IRQ_EN_ | INT_CFG_IRQ_TYPE_;
 239 #ifdef SMC_DYNAMIC_BUS_CONFIG
 240         if (lp->cfg.irq_polarity)
 241                 irq_cfg |= INT_CFG_IRQ_POL_;
 242 #endif
 243         SMC_SET_IRQ_CFG(lp, irq_cfg);
 244 
 245         /* clear anything saved */
 246         if (lp->pending_tx_skb != NULL) {
 247                 dev_kfree_skb (lp->pending_tx_skb);
 248                 lp->pending_tx_skb = NULL;
 249                 dev->stats.tx_errors++;
 250                 dev->stats.tx_aborted_errors++;
 251         }
 252 }
 253 
 254 /*
 255  * Enable Interrupts, Receive, and Transmit
 256  */
 257 static void smc911x_enable(struct net_device *dev)
 258 {
 259         struct smc911x_local *lp = netdev_priv(dev);
 260         unsigned mask, cfg, cr;
 261         unsigned long flags;
 262 
 263         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 264 
 265         spin_lock_irqsave(&lp->lock, flags);
 266 
 267         SMC_SET_MAC_ADDR(lp, dev->dev_addr);
 268 
 269         /* Enable TX */
 270         cfg = SMC_GET_HW_CFG(lp);
 271         cfg &= HW_CFG_TX_FIF_SZ_ | 0xFFF;
 272         cfg |= HW_CFG_SF_;
 273         SMC_SET_HW_CFG(lp, cfg);
 274         SMC_SET_FIFO_TDA(lp, 0xFF);
 275         /* Update TX stats on every 64 packets received or every 1 sec */
 276         SMC_SET_FIFO_TSL(lp, 64);
 277         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
 278 
 279         SMC_GET_MAC_CR(lp, cr);
 280         cr |= MAC_CR_TXEN_ | MAC_CR_HBDIS_;
 281         SMC_SET_MAC_CR(lp, cr);
 282         SMC_SET_TX_CFG(lp, TX_CFG_TX_ON_);
 283 
 284         /* Add 2 byte padding to start of packets */
 285         SMC_SET_RX_CFG(lp, (2<<8) & RX_CFG_RXDOFF_);
 286 
 287         /* Turn on receiver and enable RX */
 288         if (cr & MAC_CR_RXEN_)
 289                 DBG(SMC_DEBUG_RX, dev, "Receiver already enabled\n");
 290 
 291         SMC_SET_MAC_CR(lp, cr | MAC_CR_RXEN_);
 292 
 293         /* Interrupt on every received packet */
 294         SMC_SET_FIFO_RSA(lp, 0x01);
 295         SMC_SET_FIFO_RSL(lp, 0x00);
 296 
 297         /* now, enable interrupts */
 298         mask = INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_ | INT_EN_RSFL_EN_ |
 299                 INT_EN_GPT_INT_EN_ | INT_EN_RXDFH_INT_EN_ | INT_EN_RXE_EN_ |
 300                 INT_EN_PHY_INT_EN_;
 301         if (IS_REV_A(lp->revision))
 302                 mask|=INT_EN_RDFL_EN_;
 303         else {
 304                 mask|=INT_EN_RDFO_EN_;
 305         }
 306         SMC_ENABLE_INT(lp, mask);
 307 
 308         spin_unlock_irqrestore(&lp->lock, flags);
 309 }
 310 
 311 /*
 312  * this puts the device in an inactive state
 313  */
 314 static void smc911x_shutdown(struct net_device *dev)
 315 {
 316         struct smc911x_local *lp = netdev_priv(dev);
 317         unsigned cr;
 318         unsigned long flags;
 319 
 320         DBG(SMC_DEBUG_FUNC, dev, "%s: --> %s\n", CARDNAME, __func__);
 321 
 322         /* Disable IRQ's */
 323         SMC_SET_INT_EN(lp, 0);
 324 
 325         /* Turn of Rx and TX */
 326         spin_lock_irqsave(&lp->lock, flags);
 327         SMC_GET_MAC_CR(lp, cr);
 328         cr &= ~(MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
 329         SMC_SET_MAC_CR(lp, cr);
 330         SMC_SET_TX_CFG(lp, TX_CFG_STOP_TX_);
 331         spin_unlock_irqrestore(&lp->lock, flags);
 332 }
 333 
 334 static inline void smc911x_drop_pkt(struct net_device *dev)
 335 {
 336         struct smc911x_local *lp = netdev_priv(dev);
 337         unsigned int fifo_count, timeout, reg;
 338 
 339         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "%s: --> %s\n",
 340             CARDNAME, __func__);
 341         fifo_count = SMC_GET_RX_FIFO_INF(lp) & 0xFFFF;
 342         if (fifo_count <= 4) {
 343                 /* Manually dump the packet data */
 344                 while (fifo_count--)
 345                         SMC_GET_RX_FIFO(lp);
 346         } else   {
 347                 /* Fast forward through the bad packet */
 348                 SMC_SET_RX_DP_CTRL(lp, RX_DP_CTRL_FFWD_BUSY_);
 349                 timeout=50;
 350                 do {
 351                         udelay(10);
 352                         reg = SMC_GET_RX_DP_CTRL(lp) & RX_DP_CTRL_FFWD_BUSY_;
 353                 } while (--timeout && reg);
 354                 if (timeout == 0) {
 355                         PRINTK(dev, "timeout waiting for RX fast forward\n");
 356                 }
 357         }
 358 }
 359 
 360 /*
 361  * This is the procedure to handle the receipt of a packet.
 362  * It should be called after checking for packet presence in
 363  * the RX status FIFO.   It must be called with the spin lock
 364  * already held.
 365  */
 366 static inline void       smc911x_rcv(struct net_device *dev)
 367 {
 368         struct smc911x_local *lp = netdev_priv(dev);
 369         unsigned int pkt_len, status;
 370         struct sk_buff *skb;
 371         unsigned char *data;
 372 
 373         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_RX, dev, "--> %s\n",
 374             __func__);
 375         status = SMC_GET_RX_STS_FIFO(lp);
 376         DBG(SMC_DEBUG_RX, dev, "Rx pkt len %d status 0x%08x\n",
 377             (status & 0x3fff0000) >> 16, status & 0xc000ffff);
 378         pkt_len = (status & RX_STS_PKT_LEN_) >> 16;
 379         if (status & RX_STS_ES_) {
 380                 /* Deal with a bad packet */
 381                 dev->stats.rx_errors++;
 382                 if (status & RX_STS_CRC_ERR_)
 383                         dev->stats.rx_crc_errors++;
 384                 else {
 385                         if (status & RX_STS_LEN_ERR_)
 386                                 dev->stats.rx_length_errors++;
 387                         if (status & RX_STS_MCAST_)
 388                                 dev->stats.multicast++;
 389                 }
 390                 /* Remove the bad packet data from the RX FIFO */
 391                 smc911x_drop_pkt(dev);
 392         } else {
 393                 /* Receive a valid packet */
 394                 /* Alloc a buffer with extra room for DMA alignment */
 395                 skb = netdev_alloc_skb(dev, pkt_len+32);
 396                 if (unlikely(skb == NULL)) {
 397                         PRINTK(dev, "Low memory, rcvd packet dropped.\n");
 398                         dev->stats.rx_dropped++;
 399                         smc911x_drop_pkt(dev);
 400                         return;
 401                 }
 402                 /* Align IP header to 32 bits
 403                  * Note that the device is configured to add a 2
 404                  * byte padding to the packet start, so we really
 405                  * want to write to the orignal data pointer */
 406                 data = skb->data;
 407                 skb_reserve(skb, 2);
 408                 skb_put(skb,pkt_len-4);
 409 #ifdef SMC_USE_DMA
 410                 {
 411                 unsigned int fifo;
 412                 /* Lower the FIFO threshold if possible */
 413                 fifo = SMC_GET_FIFO_INT(lp);
 414                 if (fifo & 0xFF) fifo--;
 415                 DBG(SMC_DEBUG_RX, dev, "Setting RX stat FIFO threshold to %d\n",
 416                     fifo & 0xff);
 417                 SMC_SET_FIFO_INT(lp, fifo);
 418                 /* Setup RX DMA */
 419                 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN16_ | ((2<<8) & RX_CFG_RXDOFF_));
 420                 lp->rxdma_active = 1;
 421                 lp->current_rx_skb = skb;
 422                 SMC_PULL_DATA(lp, data, (pkt_len+2+15) & ~15);
 423                 /* Packet processing deferred to DMA RX interrupt */
 424                 }
 425 #else
 426                 SMC_SET_RX_CFG(lp, RX_CFG_RX_END_ALGN4_ | ((2<<8) & RX_CFG_RXDOFF_));
 427                 SMC_PULL_DATA(lp, data, pkt_len+2+3);
 428 
 429                 DBG(SMC_DEBUG_PKTS, dev, "Received packet\n");
 430                 PRINT_PKT(data, ((pkt_len - 4) <= 64) ? pkt_len - 4 : 64);
 431                 skb->protocol = eth_type_trans(skb, dev);
 432                 netif_rx(skb);
 433                 dev->stats.rx_packets++;
 434                 dev->stats.rx_bytes += pkt_len-4;
 435 #endif
 436         }
 437 }
 438 
 439 /*
 440  * This is called to actually send a packet to the chip.
 441  */
 442 static void smc911x_hardware_send_pkt(struct net_device *dev)
 443 {
 444         struct smc911x_local *lp = netdev_priv(dev);
 445         struct sk_buff *skb;
 446         unsigned int cmdA, cmdB, len;
 447         unsigned char *buf;
 448 
 449         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n", __func__);
 450         BUG_ON(lp->pending_tx_skb == NULL);
 451 
 452         skb = lp->pending_tx_skb;
 453         lp->pending_tx_skb = NULL;
 454 
 455         /* cmdA {25:24] data alignment [20:16] start offset [10:0] buffer length */
 456         /* cmdB {31:16] pkt tag [10:0] length */
 457 #ifdef SMC_USE_DMA
 458         /* 16 byte buffer alignment mode */
 459         buf = (char*)((u32)(skb->data) & ~0xF);
 460         len = (skb->len + 0xF + ((u32)skb->data & 0xF)) & ~0xF;
 461         cmdA = (1<<24) | (((u32)skb->data & 0xF)<<16) |
 462                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
 463                         skb->len;
 464 #else
 465         buf = (char*)((u32)skb->data & ~0x3);
 466         len = (skb->len + 3 + ((u32)skb->data & 3)) & ~0x3;
 467         cmdA = (((u32)skb->data & 0x3) << 16) |
 468                         TX_CMD_A_INT_FIRST_SEG_ | TX_CMD_A_INT_LAST_SEG_ |
 469                         skb->len;
 470 #endif
 471         /* tag is packet length so we can use this in stats update later */
 472         cmdB = (skb->len  << 16) | (skb->len & 0x7FF);
 473 
 474         DBG(SMC_DEBUG_TX, dev, "TX PKT LENGTH 0x%04x (%d) BUF 0x%p CMDA 0x%08x CMDB 0x%08x\n",
 475             len, len, buf, cmdA, cmdB);
 476         SMC_SET_TX_FIFO(lp, cmdA);
 477         SMC_SET_TX_FIFO(lp, cmdB);
 478 
 479         DBG(SMC_DEBUG_PKTS, dev, "Transmitted packet\n");
 480         PRINT_PKT(buf, len <= 64 ? len : 64);
 481 
 482         /* Send pkt via PIO or DMA */
 483 #ifdef SMC_USE_DMA
 484         lp->current_tx_skb = skb;
 485         SMC_PUSH_DATA(lp, buf, len);
 486         /* DMA complete IRQ will free buffer and set jiffies */
 487 #else
 488         SMC_PUSH_DATA(lp, buf, len);
 489         netif_trans_update(dev);
 490         dev_kfree_skb_irq(skb);
 491 #endif
 492         if (!lp->tx_throttle) {
 493                 netif_wake_queue(dev);
 494         }
 495         SMC_ENABLE_INT(lp, INT_EN_TDFA_EN_ | INT_EN_TSFL_EN_);
 496 }
 497 
 498 /*
 499  * Since I am not sure if I will have enough room in the chip's ram
 500  * to store the packet, I call this routine which either sends it
 501  * now, or set the card to generates an interrupt when ready
 502  * for the packet.
 503  */
 504 static netdev_tx_t
 505 smc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 506 {
 507         struct smc911x_local *lp = netdev_priv(dev);
 508         unsigned int free;
 509         unsigned long flags;
 510 
 511         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
 512             __func__);
 513 
 514         spin_lock_irqsave(&lp->lock, flags);
 515 
 516         BUG_ON(lp->pending_tx_skb != NULL);
 517 
 518         free = SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TDFREE_;
 519         DBG(SMC_DEBUG_TX, dev, "TX free space %d\n", free);
 520 
 521         /* Turn off the flow when running out of space in FIFO */
 522         if (free <= SMC911X_TX_FIFO_LOW_THRESHOLD) {
 523                 DBG(SMC_DEBUG_TX, dev, "Disabling data flow due to low FIFO space (%d)\n",
 524                     free);
 525                 /* Reenable when at least 1 packet of size MTU present */
 526                 SMC_SET_FIFO_TDA(lp, (SMC911X_TX_FIFO_LOW_THRESHOLD)/64);
 527                 lp->tx_throttle = 1;
 528                 netif_stop_queue(dev);
 529         }
 530 
 531         /* Drop packets when we run out of space in TX FIFO
 532          * Account for overhead required for:
 533          *
 534          *        Tx command words                       8 bytes
 535          *        Start offset                           15 bytes
 536          *        End padding                            15 bytes
 537          */
 538         if (unlikely(free < (skb->len + 8 + 15 + 15))) {
 539                 netdev_warn(dev, "No Tx free space %d < %d\n",
 540                             free, skb->len);
 541                 lp->pending_tx_skb = NULL;
 542                 dev->stats.tx_errors++;
 543                 dev->stats.tx_dropped++;
 544                 spin_unlock_irqrestore(&lp->lock, flags);
 545                 dev_kfree_skb_any(skb);
 546                 return NETDEV_TX_OK;
 547         }
 548 
 549 #ifdef SMC_USE_DMA
 550         {
 551                 /* If the DMA is already running then defer this packet Tx until
 552                  * the DMA IRQ starts it
 553                  */
 554                 if (lp->txdma_active) {
 555                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Tx DMA running, deferring packet\n");
 556                         lp->pending_tx_skb = skb;
 557                         netif_stop_queue(dev);
 558                         spin_unlock_irqrestore(&lp->lock, flags);
 559                         return NETDEV_TX_OK;
 560                 } else {
 561                         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "Activating Tx DMA\n");
 562                         lp->txdma_active = 1;
 563                 }
 564         }
 565 #endif
 566         lp->pending_tx_skb = skb;
 567         smc911x_hardware_send_pkt(dev);
 568         spin_unlock_irqrestore(&lp->lock, flags);
 569 
 570         return NETDEV_TX_OK;
 571 }
 572 
 573 /*
 574  * This handles a TX status interrupt, which is only called when:
 575  * - a TX error occurred, or
 576  * - TX of a packet completed.
 577  */
 578 static void smc911x_tx(struct net_device *dev)
 579 {
 580         struct smc911x_local *lp = netdev_priv(dev);
 581         unsigned int tx_status;
 582 
 583         DBG(SMC_DEBUG_FUNC | SMC_DEBUG_TX, dev, "--> %s\n",
 584             __func__);
 585 
 586         /* Collect the TX status */
 587         while (((SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16) != 0) {
 588                 DBG(SMC_DEBUG_TX, dev, "Tx stat FIFO used 0x%04x\n",
 589                     (SMC_GET_TX_FIFO_INF(lp) & TX_FIFO_INF_TSUSED_) >> 16);
 590                 tx_status = SMC_GET_TX_STS_FIFO(lp);
 591                 dev->stats.tx_packets++;
 592                 dev->stats.tx_bytes+=tx_status>>16;
 593                 DBG(SMC_DEBUG_TX, dev, "Tx FIFO tag 0x%04x status 0x%04x\n",
 594                     (tx_status & 0xffff0000) >> 16,
 595                     tx_status & 0x0000ffff);
 596                 /* count Tx errors, but ignore lost carrier errors when in
 597                  * full-duplex mode */
 598                 if ((tx_status & TX_STS_ES_) && !(lp->ctl_rfduplx &&
 599                     !(tx_status & 0x00000306))) {
 600                         dev->stats.tx_errors++;
 601                 }
 602                 if (tx_status & TX_STS_MANY_COLL_) {
 603                         dev->stats.collisions+=16;
 604                         dev->stats.tx_aborted_errors++;
 605                 } else {
 606                         dev->stats.collisions+=(tx_status & TX_STS_COLL_CNT_) >> 3;
 607                 }
 608                 /* carrier error only has meaning for half-duplex communication */
 609                 if ((tx_status & (TX_STS_LOC_ | TX_STS_NO_CARR_)) &&
 610                     !lp->ctl_rfduplx) {
 611                         dev->stats.tx_carrier_errors++;
 612                 }
 613                 if (tx_status & TX_STS_LATE_COLL_) {
 614                         dev->stats.collisions++;
 615                         dev->stats.tx_aborted_errors++;
 616                 }
 617         }
 618 }
 619 
 620 
 621 /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
 622 /*
 623  * Reads a register from the MII Management serial interface
 624  */
 625 
 626 static int smc911x_phy_read(struct net_device *dev, int phyaddr, int phyreg)
 627 {
 628         struct smc911x_local *lp = netdev_priv(dev);
 629         unsigned int phydata;
 630 
 631         SMC_GET_MII(lp, phyreg, phyaddr, phydata);
 632 
 633         DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%02x, phydata=0x%04x\n",
 634             __func__, phyaddr, phyreg, phydata);
 635         return phydata;
 636 }
 637 
 638 
 639 /*
 640  * Writes a register to the MII Management serial interface
 641  */
 642 static void smc911x_phy_write(struct net_device *dev, int phyaddr, int phyreg,
 643                         int phydata)
 644 {
 645         struct smc911x_local *lp = netdev_priv(dev);
 646 
 647         DBG(SMC_DEBUG_MISC, dev, "%s: phyaddr=0x%x, phyreg=0x%x, phydata=0x%x\n",
 648             __func__, phyaddr, phyreg, phydata);
 649 
 650         SMC_SET_MII(lp, phyreg, phyaddr, phydata);
 651 }
 652 
 653 /*
 654  * Finds and reports the PHY address (115 and 117 have external
 655  * PHY interface 118 has internal only
 656  */
 657 static void smc911x_phy_detect(struct net_device *dev)
 658 {
 659         struct smc911x_local *lp = netdev_priv(dev);
 660         int phyaddr;
 661         unsigned int cfg, id1, id2;
 662 
 663         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 664 
 665         lp->phy_type = 0;
 666 
 667         /*
 668          * Scan all 32 PHY addresses if necessary, starting at
 669          * PHY#1 to PHY#31, and then PHY#0 last.
 670          */
 671         switch(lp->version) {
 672                 case CHIP_9115:
 673                 case CHIP_9117:
 674                 case CHIP_9215:
 675                 case CHIP_9217:
 676                         cfg = SMC_GET_HW_CFG(lp);
 677                         if (cfg & HW_CFG_EXT_PHY_DET_) {
 678                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
 679                                 cfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
 680                                 SMC_SET_HW_CFG(lp, cfg);
 681                                 udelay(10); /* Wait for clocks to stop */
 682 
 683                                 cfg |= HW_CFG_EXT_PHY_EN_;
 684                                 SMC_SET_HW_CFG(lp, cfg);
 685                                 udelay(10); /* Wait for clocks to stop */
 686 
 687                                 cfg &= ~HW_CFG_PHY_CLK_SEL_;
 688                                 cfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
 689                                 SMC_SET_HW_CFG(lp, cfg);
 690                                 udelay(10); /* Wait for clocks to stop */
 691 
 692                                 cfg |= HW_CFG_SMI_SEL_;
 693                                 SMC_SET_HW_CFG(lp, cfg);
 694 
 695                                 for (phyaddr = 1; phyaddr < 32; ++phyaddr) {
 696 
 697                                         /* Read the PHY identifiers */
 698                                         SMC_GET_PHY_ID1(lp, phyaddr & 31, id1);
 699                                         SMC_GET_PHY_ID2(lp, phyaddr & 31, id2);
 700 
 701                                         /* Make sure it is a valid identifier */
 702                                         if (id1 != 0x0000 && id1 != 0xffff &&
 703                                             id1 != 0x8000 && id2 != 0x0000 &&
 704                                             id2 != 0xffff && id2 != 0x8000) {
 705                                                 /* Save the PHY's address */
 706                                                 lp->mii.phy_id = phyaddr & 31;
 707                                                 lp->phy_type = id1 << 16 | id2;
 708                                                 break;
 709                                         }
 710                                 }
 711                                 if (phyaddr < 32)
 712                                         /* Found an external PHY */
 713                                         break;
 714                         }
 715                         /* Else, fall through */
 716                 default:
 717                         /* Internal media only */
 718                         SMC_GET_PHY_ID1(lp, 1, id1);
 719                         SMC_GET_PHY_ID2(lp, 1, id2);
 720                         /* Save the PHY's address */
 721                         lp->mii.phy_id = 1;
 722                         lp->phy_type = id1 << 16 | id2;
 723         }
 724 
 725         DBG(SMC_DEBUG_MISC, dev, "phy_id1=0x%x, phy_id2=0x%x phyaddr=0x%x\n",
 726             id1, id2, lp->mii.phy_id);
 727 }
 728 
 729 /*
 730  * Sets the PHY to a configuration as determined by the user.
 731  * Called with spin_lock held.
 732  */
 733 static int smc911x_phy_fixed(struct net_device *dev)
 734 {
 735         struct smc911x_local *lp = netdev_priv(dev);
 736         int phyaddr = lp->mii.phy_id;
 737         int bmcr;
 738 
 739         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 740 
 741         /* Enter Link Disable state */
 742         SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
 743         bmcr |= BMCR_PDOWN;
 744         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 745 
 746         /*
 747          * Set our fixed capabilities
 748          * Disable auto-negotiation
 749          */
 750         bmcr &= ~BMCR_ANENABLE;
 751         if (lp->ctl_rfduplx)
 752                 bmcr |= BMCR_FULLDPLX;
 753 
 754         if (lp->ctl_rspeed == 100)
 755                 bmcr |= BMCR_SPEED100;
 756 
 757         /* Write our capabilities to the phy control register */
 758         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 759 
 760         /* Re-Configure the Receive/Phy Control register */
 761         bmcr &= ~BMCR_PDOWN;
 762         SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 763 
 764         return 1;
 765 }
 766 
 767 /**
 768  * smc911x_phy_reset - reset the phy
 769  * @dev: net device
 770  * @phy: phy address
 771  *
 772  * Issue a software reset for the specified PHY and
 773  * wait up to 100ms for the reset to complete.   We should
 774  * not access the PHY for 50ms after issuing the reset.
 775  *
 776  * The time to wait appears to be dependent on the PHY.
 777  *
 778  */
 779 static int smc911x_phy_reset(struct net_device *dev, int phy)
 780 {
 781         struct smc911x_local *lp = netdev_priv(dev);
 782         int timeout;
 783         unsigned long flags;
 784         unsigned int reg;
 785 
 786         DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
 787 
 788         spin_lock_irqsave(&lp->lock, flags);
 789         reg = SMC_GET_PMT_CTRL(lp);
 790         reg &= ~0xfffff030;
 791         reg |= PMT_CTRL_PHY_RST_;
 792         SMC_SET_PMT_CTRL(lp, reg);
 793         spin_unlock_irqrestore(&lp->lock, flags);
 794         for (timeout = 2; timeout; timeout--) {
 795                 msleep(50);
 796                 spin_lock_irqsave(&lp->lock, flags);
 797                 reg = SMC_GET_PMT_CTRL(lp);
 798                 spin_unlock_irqrestore(&lp->lock, flags);
 799                 if (!(reg & PMT_CTRL_PHY_RST_)) {
 800                         /* extra delay required because the phy may
 801                          * not be completed with its reset
 802                          * when PHY_BCR_RESET_ is cleared. 256us
 803                          * should suffice, but use 500us to be safe
 804                          */
 805                         udelay(500);
 806                 break;
 807                 }
 808         }
 809 
 810         return reg & PMT_CTRL_PHY_RST_;
 811 }
 812 
 813 /**
 814  * smc911x_phy_powerdown - powerdown phy
 815  * @dev: net device
 816  * @phy: phy address
 817  *
 818  * Power down the specified PHY
 819  */
 820 static void smc911x_phy_powerdown(struct net_device *dev, int phy)
 821 {
 822         struct smc911x_local *lp = netdev_priv(dev);
 823         unsigned int bmcr;
 824 
 825         /* Enter Link Disable state */
 826         SMC_GET_PHY_BMCR(lp, phy, bmcr);
 827         bmcr |= BMCR_PDOWN;
 828         SMC_SET_PHY_BMCR(lp, phy, bmcr);
 829 }
 830 
 831 /**
 832  * smc911x_phy_check_media - check the media status and adjust BMCR
 833  * @dev: net device
 834  * @init: set true for initialisation
 835  *
 836  * Select duplex mode depending on negotiation state.   This
 837  * also updates our carrier state.
 838  */
 839 static void smc911x_phy_check_media(struct net_device *dev, int init)
 840 {
 841         struct smc911x_local *lp = netdev_priv(dev);
 842         int phyaddr = lp->mii.phy_id;
 843         unsigned int bmcr, cr;
 844 
 845         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 846 
 847         if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
 848                 /* duplex state has changed */
 849                 SMC_GET_PHY_BMCR(lp, phyaddr, bmcr);
 850                 SMC_GET_MAC_CR(lp, cr);
 851                 if (lp->mii.full_duplex) {
 852                         DBG(SMC_DEBUG_MISC, dev, "Configuring for full-duplex mode\n");
 853                         bmcr |= BMCR_FULLDPLX;
 854                         cr |= MAC_CR_RCVOWN_;
 855                 } else {
 856                         DBG(SMC_DEBUG_MISC, dev, "Configuring for half-duplex mode\n");
 857                         bmcr &= ~BMCR_FULLDPLX;
 858                         cr &= ~MAC_CR_RCVOWN_;
 859                 }
 860                 SMC_SET_PHY_BMCR(lp, phyaddr, bmcr);
 861                 SMC_SET_MAC_CR(lp, cr);
 862         }
 863 }
 864 
 865 /*
 866  * Configures the specified PHY through the MII management interface
 867  * using Autonegotiation.
 868  * Calls smc911x_phy_fixed() if the user has requested a certain config.
 869  * If RPC ANEG bit is set, the media selection is dependent purely on
 870  * the selection by the MII (either in the MII BMCR reg or the result
 871  * of autonegotiation.)  If the RPC ANEG bit is cleared, the selection
 872  * is controlled by the RPC SPEED and RPC DPLX bits.
 873  */
 874 static void smc911x_phy_configure(struct work_struct *work)
 875 {
 876         struct smc911x_local *lp = container_of(work, struct smc911x_local,
 877                                                 phy_configure);
 878         struct net_device *dev = lp->netdev;
 879         int phyaddr = lp->mii.phy_id;
 880         int my_phy_caps; /* My PHY capabilities */
 881         int my_ad_caps; /* My Advertised capabilities */
 882         int status;
 883         unsigned long flags;
 884 
 885         DBG(SMC_DEBUG_FUNC, dev, "--> %s()\n", __func__);
 886 
 887         /*
 888          * We should not be called if phy_type is zero.
 889          */
 890         if (lp->phy_type == 0)
 891                 return;
 892 
 893         if (smc911x_phy_reset(dev, phyaddr)) {
 894                 netdev_info(dev, "PHY reset timed out\n");
 895                 return;
 896         }
 897         spin_lock_irqsave(&lp->lock, flags);
 898 
 899         /*
 900          * Enable PHY Interrupts (for register 18)
 901          * Interrupts listed here are enabled
 902          */
 903         SMC_SET_PHY_INT_MASK(lp, phyaddr, PHY_INT_MASK_ENERGY_ON_ |
 904                  PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_REMOTE_FAULT_ |
 905                  PHY_INT_MASK_LINK_DOWN_);
 906 
 907         /* If the user requested no auto neg, then go set his request */
 908         if (lp->mii.force_media) {
 909                 smc911x_phy_fixed(dev);
 910                 goto smc911x_phy_configure_exit;
 911         }
 912 
 913         /* Copy our capabilities from MII_BMSR to MII_ADVERTISE */
 914         SMC_GET_PHY_BMSR(lp, phyaddr, my_phy_caps);
 915         if (!(my_phy_caps & BMSR_ANEGCAPABLE)) {
 916                 netdev_info(dev, "Auto negotiation NOT supported\n");
 917                 smc911x_phy_fixed(dev);
 918                 goto smc911x_phy_configure_exit;
 919         }
 920 
 921         /* CSMA capable w/ both pauses */
 922         my_ad_caps = ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 923 
 924         if (my_phy_caps & BMSR_100BASE4)
 925                 my_ad_caps |= ADVERTISE_100BASE4;
 926         if (my_phy_caps & BMSR_100FULL)
 927                 my_ad_caps |= ADVERTISE_100FULL;
 928         if (my_phy_caps & BMSR_100HALF)
 929                 my_ad_caps |= ADVERTISE_100HALF;
 930         if (my_phy_caps & BMSR_10FULL)
 931                 my_ad_caps |= ADVERTISE_10FULL;
 932         if (my_phy_caps & BMSR_10HALF)
 933                 my_ad_caps |= ADVERTISE_10HALF;
 934 
 935         /* Disable capabilities not selected by our user */
 936         if (lp->ctl_rspeed != 100)
 937                 my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
 938 
 939         if (!lp->ctl_rfduplx)
 940                 my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
 941 
 942         /* Update our Auto-Neg Advertisement Register */
 943         SMC_SET_PHY_MII_ADV(lp, phyaddr, my_ad_caps);
 944         lp->mii.advertising = my_ad_caps;
 945 
 946         /*
 947          * Read the register back.       Without this, it appears that when
 948          * auto-negotiation is restarted, sometimes it isn't ready and
 949          * the link does not come up.
 950          */
 951         udelay(10);
 952         SMC_GET_PHY_MII_ADV(lp, phyaddr, status);
 953 
 954         DBG(SMC_DEBUG_MISC, dev, "phy caps=0x%04x\n", my_phy_caps);
 955         DBG(SMC_DEBUG_MISC, dev, "phy advertised caps=0x%04x\n", my_ad_caps);
 956 
 957         /* Restart auto-negotiation process in order to advertise my caps */
 958         SMC_SET_PHY_BMCR(lp, phyaddr, BMCR_ANENABLE | BMCR_ANRESTART);
 959 
 960         smc911x_phy_check_media(dev, 1);
 961 
 962 smc911x_phy_configure_exit:
 963         spin_unlock_irqrestore(&lp->lock, flags);
 964 }
 965 
 966 /*
 967  * smc911x_phy_interrupt
 968  *
 969  * Purpose:  Handle interrupts relating to PHY register 18. This is
 970  *       called from the "hard" interrupt handler under our private spinlock.
 971  */
 972 static void smc911x_phy_interrupt(struct net_device *dev)
 973 {
 974         struct smc911x_local *lp = netdev_priv(dev);
 975         int phyaddr = lp->mii.phy_id;
 976         int status;
 977 
 978         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
 979 
 980         if (lp->phy_type == 0)
 981                 return;
 982 
 983         smc911x_phy_check_media(dev, 0);
 984         /* read to clear status bits */
 985         SMC_GET_PHY_INT_SRC(lp, phyaddr,status);
 986         DBG(SMC_DEBUG_MISC, dev, "PHY interrupt status 0x%04x\n",
 987             status & 0xffff);
 988         DBG(SMC_DEBUG_MISC, dev, "AFC_CFG 0x%08x\n",
 989             SMC_GET_AFC_CFG(lp));
 990 }
 991 
 992 /*--- END PHY CONTROL AND CONFIGURATION-------------------------------------*/
 993 
 994 /*
 995  * This is the main routine of the driver, to handle the device when
 996  * it needs some attention.
 997  */
 998 static irqreturn_t smc911x_interrupt(int irq, void *dev_id)
 999 {
1000         struct net_device *dev = dev_id;
1001         struct smc911x_local *lp = netdev_priv(dev);
1002         unsigned int status, mask, timeout;
1003         unsigned int rx_overrun=0, cr, pkts;
1004         unsigned long flags;
1005 
1006         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1007 
1008         spin_lock_irqsave(&lp->lock, flags);
1009 
1010         /* Spurious interrupt check */
1011         if ((SMC_GET_IRQ_CFG(lp) & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
1012                 (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
1013                 spin_unlock_irqrestore(&lp->lock, flags);
1014                 return IRQ_NONE;
1015         }
1016 
1017         mask = SMC_GET_INT_EN(lp);
1018         SMC_SET_INT_EN(lp, 0);
1019 
1020         /* set a timeout value, so I don't stay here forever */
1021         timeout = 8;
1022 
1023 
1024         do {
1025                 status = SMC_GET_INT(lp);
1026 
1027                 DBG(SMC_DEBUG_MISC, dev, "INT 0x%08x MASK 0x%08x OUTSIDE MASK 0x%08x\n",
1028                     status, mask, status & ~mask);
1029 
1030                 status &= mask;
1031                 if (!status)
1032                         break;
1033 
1034                 /* Handle SW interrupt condition */
1035                 if (status & INT_STS_SW_INT_) {
1036                         SMC_ACK_INT(lp, INT_STS_SW_INT_);
1037                         mask &= ~INT_EN_SW_INT_EN_;
1038                 }
1039                 /* Handle various error conditions */
1040                 if (status & INT_STS_RXE_) {
1041                         SMC_ACK_INT(lp, INT_STS_RXE_);
1042                         dev->stats.rx_errors++;
1043                 }
1044                 if (status & INT_STS_RXDFH_INT_) {
1045                         SMC_ACK_INT(lp, INT_STS_RXDFH_INT_);
1046                         dev->stats.rx_dropped+=SMC_GET_RX_DROP(lp);
1047                  }
1048                 /* Undocumented interrupt-what is the right thing to do here? */
1049                 if (status & INT_STS_RXDF_INT_) {
1050                         SMC_ACK_INT(lp, INT_STS_RXDF_INT_);
1051                 }
1052 
1053                 /* Rx Data FIFO exceeds set level */
1054                 if (status & INT_STS_RDFL_) {
1055                         if (IS_REV_A(lp->revision)) {
1056                                 rx_overrun=1;
1057                                 SMC_GET_MAC_CR(lp, cr);
1058                                 cr &= ~MAC_CR_RXEN_;
1059                                 SMC_SET_MAC_CR(lp, cr);
1060                                 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1061                                 dev->stats.rx_errors++;
1062                                 dev->stats.rx_fifo_errors++;
1063                         }
1064                         SMC_ACK_INT(lp, INT_STS_RDFL_);
1065                 }
1066                 if (status & INT_STS_RDFO_) {
1067                         if (!IS_REV_A(lp->revision)) {
1068                                 SMC_GET_MAC_CR(lp, cr);
1069                                 cr &= ~MAC_CR_RXEN_;
1070                                 SMC_SET_MAC_CR(lp, cr);
1071                                 rx_overrun=1;
1072                                 DBG(SMC_DEBUG_RX, dev, "RX overrun\n");
1073                                 dev->stats.rx_errors++;
1074                                 dev->stats.rx_fifo_errors++;
1075                         }
1076                         SMC_ACK_INT(lp, INT_STS_RDFO_);
1077                 }
1078                 /* Handle receive condition */
1079                 if ((status & INT_STS_RSFL_) || rx_overrun) {
1080                         unsigned int fifo;
1081                         DBG(SMC_DEBUG_RX, dev, "RX irq\n");
1082                         fifo = SMC_GET_RX_FIFO_INF(lp);
1083                         pkts = (fifo & RX_FIFO_INF_RXSUSED_) >> 16;
1084                         DBG(SMC_DEBUG_RX, dev, "Rx FIFO pkts %d, bytes %d\n",
1085                             pkts, fifo & 0xFFFF);
1086                         if (pkts != 0) {
1087 #ifdef SMC_USE_DMA
1088                                 unsigned int fifo;
1089                                 if (lp->rxdma_active){
1090                                         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1091                                             "RX DMA active\n");
1092                                         /* The DMA is already running so up the IRQ threshold */
1093                                         fifo = SMC_GET_FIFO_INT(lp) & ~0xFF;
1094                                         fifo |= pkts & 0xFF;
1095                                         DBG(SMC_DEBUG_RX, dev,
1096                                             "Setting RX stat FIFO threshold to %d\n",
1097                                             fifo & 0xff);
1098                                         SMC_SET_FIFO_INT(lp, fifo);
1099                                 } else
1100 #endif
1101                                 smc911x_rcv(dev);
1102                         }
1103                         SMC_ACK_INT(lp, INT_STS_RSFL_);
1104                 }
1105                 /* Handle transmit FIFO available */
1106                 if (status & INT_STS_TDFA_) {
1107                         DBG(SMC_DEBUG_TX, dev, "TX data FIFO space available irq\n");
1108                         SMC_SET_FIFO_TDA(lp, 0xFF);
1109                         lp->tx_throttle = 0;
1110 #ifdef SMC_USE_DMA
1111                         if (!lp->txdma_active)
1112 #endif
1113                                 netif_wake_queue(dev);
1114                         SMC_ACK_INT(lp, INT_STS_TDFA_);
1115                 }
1116                 /* Handle transmit done condition */
1117 #if 1
1118                 if (status & (INT_STS_TSFL_ | INT_STS_GPT_INT_)) {
1119                         DBG(SMC_DEBUG_TX | SMC_DEBUG_MISC, dev,
1120                             "Tx stat FIFO limit (%d) /GPT irq\n",
1121                             (SMC_GET_FIFO_INT(lp) & 0x00ff0000) >> 16);
1122                         smc911x_tx(dev);
1123                         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1124                         SMC_ACK_INT(lp, INT_STS_TSFL_);
1125                         SMC_ACK_INT(lp, INT_STS_TSFL_ | INT_STS_GPT_INT_);
1126                 }
1127 #else
1128                 if (status & INT_STS_TSFL_) {
1129                         DBG(SMC_DEBUG_TX, dev, "TX status FIFO limit (%d) irq\n", ?);
1130                         smc911x_tx(dev);
1131                         SMC_ACK_INT(lp, INT_STS_TSFL_);
1132                 }
1133 
1134                 if (status & INT_STS_GPT_INT_) {
1135                         DBG(SMC_DEBUG_RX, dev, "IRQ_CFG 0x%08x FIFO_INT 0x%08x RX_CFG 0x%08x\n",
1136                             SMC_GET_IRQ_CFG(lp),
1137                             SMC_GET_FIFO_INT(lp),
1138                             SMC_GET_RX_CFG(lp));
1139                         DBG(SMC_DEBUG_RX, dev, "Rx Stat FIFO Used 0x%02x Data FIFO Used 0x%04x Stat FIFO 0x%08x\n",
1140                             (SMC_GET_RX_FIFO_INF(lp) & 0x00ff0000) >> 16,
1141                             SMC_GET_RX_FIFO_INF(lp) & 0xffff,
1142                             SMC_GET_RX_STS_FIFO_PEEK(lp));
1143                         SMC_SET_GPT_CFG(lp, GPT_CFG_TIMER_EN_ | 10000);
1144                         SMC_ACK_INT(lp, INT_STS_GPT_INT_);
1145                 }
1146 #endif
1147 
1148                 /* Handle PHY interrupt condition */
1149                 if (status & INT_STS_PHY_INT_) {
1150                         DBG(SMC_DEBUG_MISC, dev, "PHY irq\n");
1151                         smc911x_phy_interrupt(dev);
1152                         SMC_ACK_INT(lp, INT_STS_PHY_INT_);
1153                 }
1154         } while (--timeout);
1155 
1156         /* restore mask state */
1157         SMC_SET_INT_EN(lp, mask);
1158 
1159         DBG(SMC_DEBUG_MISC, dev, "Interrupt done (%d loops)\n",
1160             8-timeout);
1161 
1162         spin_unlock_irqrestore(&lp->lock, flags);
1163 
1164         return IRQ_HANDLED;
1165 }
1166 
1167 #ifdef SMC_USE_DMA
1168 static void
1169 smc911x_tx_dma_irq(void *data)
1170 {
1171         struct smc911x_local *lp = data;
1172         struct net_device *dev = lp->netdev;
1173         struct sk_buff *skb = lp->current_tx_skb;
1174         unsigned long flags;
1175 
1176         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1177 
1178         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev, "TX DMA irq handler\n");
1179         BUG_ON(skb == NULL);
1180         dma_unmap_single(lp->dev, tx_dmabuf, tx_dmalen, DMA_TO_DEVICE);
1181         netif_trans_update(dev);
1182         dev_kfree_skb_irq(skb);
1183         lp->current_tx_skb = NULL;
1184         if (lp->pending_tx_skb != NULL)
1185                 smc911x_hardware_send_pkt(dev);
1186         else {
1187                 DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1188                     "No pending Tx packets. DMA disabled\n");
1189                 spin_lock_irqsave(&lp->lock, flags);
1190                 lp->txdma_active = 0;
1191                 if (!lp->tx_throttle) {
1192                         netif_wake_queue(dev);
1193                 }
1194                 spin_unlock_irqrestore(&lp->lock, flags);
1195         }
1196 
1197         DBG(SMC_DEBUG_TX | SMC_DEBUG_DMA, dev,
1198             "TX DMA irq completed\n");
1199 }
1200 static void
1201 smc911x_rx_dma_irq(void *data)
1202 {
1203         struct smc911x_local *lp = data;
1204         struct net_device *dev = lp->netdev;
1205         struct sk_buff *skb = lp->current_rx_skb;
1206         unsigned long flags;
1207         unsigned int pkts;
1208 
1209         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1210         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev, "RX DMA irq handler\n");
1211         dma_unmap_single(lp->dev, rx_dmabuf, rx_dmalen, DMA_FROM_DEVICE);
1212         BUG_ON(skb == NULL);
1213         lp->current_rx_skb = NULL;
1214         PRINT_PKT(skb->data, skb->len);
1215         skb->protocol = eth_type_trans(skb, dev);
1216         dev->stats.rx_packets++;
1217         dev->stats.rx_bytes += skb->len;
1218         netif_rx(skb);
1219 
1220         spin_lock_irqsave(&lp->lock, flags);
1221         pkts = (SMC_GET_RX_FIFO_INF(lp) & RX_FIFO_INF_RXSUSED_) >> 16;
1222         if (pkts != 0) {
1223                 smc911x_rcv(dev);
1224         }else {
1225                 lp->rxdma_active = 0;
1226         }
1227         spin_unlock_irqrestore(&lp->lock, flags);
1228         DBG(SMC_DEBUG_RX | SMC_DEBUG_DMA, dev,
1229             "RX DMA irq completed. DMA RX FIFO PKTS %d\n",
1230             pkts);
1231 }
1232 #endif   /* SMC_USE_DMA */
1233 
1234 #ifdef CONFIG_NET_POLL_CONTROLLER
1235 /*
1236  * Polling receive - used by netconsole and other diagnostic tools
1237  * to allow network i/o with interrupts disabled.
1238  */
1239 static void smc911x_poll_controller(struct net_device *dev)
1240 {
1241         disable_irq(dev->irq);
1242         smc911x_interrupt(dev->irq, dev);
1243         enable_irq(dev->irq);
1244 }
1245 #endif
1246 
1247 /* Our watchdog timed out. Called by the networking layer */
1248 static void smc911x_timeout(struct net_device *dev)
1249 {
1250         struct smc911x_local *lp = netdev_priv(dev);
1251         int status, mask;
1252         unsigned long flags;
1253 
1254         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1255 
1256         spin_lock_irqsave(&lp->lock, flags);
1257         status = SMC_GET_INT(lp);
1258         mask = SMC_GET_INT_EN(lp);
1259         spin_unlock_irqrestore(&lp->lock, flags);
1260         DBG(SMC_DEBUG_MISC, dev, "INT 0x%02x MASK 0x%02x\n",
1261             status, mask);
1262 
1263         /* Dump the current TX FIFO contents and restart */
1264         mask = SMC_GET_TX_CFG(lp);
1265         SMC_SET_TX_CFG(lp, mask | TX_CFG_TXS_DUMP_ | TX_CFG_TXD_DUMP_);
1266         /*
1267          * Reconfiguring the PHY doesn't seem like a bad idea here, but
1268          * smc911x_phy_configure() calls msleep() which calls schedule_timeout()
1269          * which calls schedule().       Hence we use a work queue.
1270          */
1271         if (lp->phy_type != 0)
1272                 schedule_work(&lp->phy_configure);
1273 
1274         /* We can accept TX packets again */
1275         netif_trans_update(dev); /* prevent tx timeout */
1276         netif_wake_queue(dev);
1277 }
1278 
1279 /*
1280  * This routine will, depending on the values passed to it,
1281  * either make it accept multicast packets, go into
1282  * promiscuous mode (for TCPDUMP and cousins) or accept
1283  * a select set of multicast packets
1284  */
1285 static void smc911x_set_multicast_list(struct net_device *dev)
1286 {
1287         struct smc911x_local *lp = netdev_priv(dev);
1288         unsigned int multicast_table[2];
1289         unsigned int mcr, update_multicast = 0;
1290         unsigned long flags;
1291 
1292         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1293 
1294         spin_lock_irqsave(&lp->lock, flags);
1295         SMC_GET_MAC_CR(lp, mcr);
1296         spin_unlock_irqrestore(&lp->lock, flags);
1297 
1298         if (dev->flags & IFF_PROMISC) {
1299 
1300                 DBG(SMC_DEBUG_MISC, dev, "RCR_PRMS\n");
1301                 mcr |= MAC_CR_PRMS_;
1302         }
1303         /*
1304          * Here, I am setting this to accept all multicast packets.
1305          * I don't need to zero the multicast table, because the flag is
1306          * checked before the table is
1307          */
1308         else if (dev->flags & IFF_ALLMULTI || netdev_mc_count(dev) > 16) {
1309                 DBG(SMC_DEBUG_MISC, dev, "RCR_ALMUL\n");
1310                 mcr |= MAC_CR_MCPAS_;
1311         }
1312 
1313         /*
1314          * This sets the internal hardware table to filter out unwanted
1315          * multicast packets before they take up memory.
1316          *
1317          * The SMC chip uses a hash table where the high 6 bits of the CRC of
1318          * address are the offset into the table.       If that bit is 1, then the
1319          * multicast packet is accepted.  Otherwise, it's dropped silently.
1320          *
1321          * To use the 6 bits as an offset into the table, the high 1 bit is
1322          * the number of the 32 bit register, while the low 5 bits are the bit
1323          * within that register.
1324          */
1325         else if (!netdev_mc_empty(dev)) {
1326                 struct netdev_hw_addr *ha;
1327 
1328                 /* Set the Hash perfec mode */
1329                 mcr |= MAC_CR_HPFILT_;
1330 
1331                 /* start with a table of all zeros: reject all */
1332                 memset(multicast_table, 0, sizeof(multicast_table));
1333 
1334                 netdev_for_each_mc_addr(ha, dev) {
1335                         u32 position;
1336 
1337                         /* upper 6 bits are used as hash index */
1338                         position = ether_crc(ETH_ALEN, ha->addr)>>26;
1339 
1340                         multicast_table[position>>5] |= 1 << (position&0x1f);
1341                 }
1342 
1343                 /* be sure I get rid of flags I might have set */
1344                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1345 
1346                 /* now, the table can be loaded into the chipset */
1347                 update_multicast = 1;
1348         } else   {
1349                 DBG(SMC_DEBUG_MISC, dev, "~(MAC_CR_PRMS_|MAC_CR_MCPAS_)\n");
1350                 mcr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1351 
1352                 /*
1353                  * since I'm disabling all multicast entirely, I need to
1354                  * clear the multicast list
1355                  */
1356                 memset(multicast_table, 0, sizeof(multicast_table));
1357                 update_multicast = 1;
1358         }
1359 
1360         spin_lock_irqsave(&lp->lock, flags);
1361         SMC_SET_MAC_CR(lp, mcr);
1362         if (update_multicast) {
1363                 DBG(SMC_DEBUG_MISC, dev,
1364                     "update mcast hash table 0x%08x 0x%08x\n",
1365                     multicast_table[0], multicast_table[1]);
1366                 SMC_SET_HASHL(lp, multicast_table[0]);
1367                 SMC_SET_HASHH(lp, multicast_table[1]);
1368         }
1369         spin_unlock_irqrestore(&lp->lock, flags);
1370 }
1371 
1372 
1373 /*
1374  * Open and Initialize the board
1375  *
1376  * Set up everything, reset the card, etc..
1377  */
1378 static int
1379 smc911x_open(struct net_device *dev)
1380 {
1381         struct smc911x_local *lp = netdev_priv(dev);
1382 
1383         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1384 
1385         /* reset the hardware */
1386         smc911x_reset(dev);
1387 
1388         /* Configure the PHY, initialize the link state */
1389         smc911x_phy_configure(&lp->phy_configure);
1390 
1391         /* Turn on Tx + Rx */
1392         smc911x_enable(dev);
1393 
1394         netif_start_queue(dev);
1395 
1396         return 0;
1397 }
1398 
1399 /*
1400  * smc911x_close
1401  *
1402  * this makes the board clean up everything that it can
1403  * and not talk to the outside world.    Caused by
1404  * an 'ifconfig ethX down'
1405  */
1406 static int smc911x_close(struct net_device *dev)
1407 {
1408         struct smc911x_local *lp = netdev_priv(dev);
1409 
1410         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1411 
1412         netif_stop_queue(dev);
1413         netif_carrier_off(dev);
1414 
1415         /* clear everything */
1416         smc911x_shutdown(dev);
1417 
1418         if (lp->phy_type != 0) {
1419                 /* We need to ensure that no calls to
1420                  * smc911x_phy_configure are pending.
1421                  */
1422                 cancel_work_sync(&lp->phy_configure);
1423                 smc911x_phy_powerdown(dev, lp->mii.phy_id);
1424         }
1425 
1426         if (lp->pending_tx_skb) {
1427                 dev_kfree_skb(lp->pending_tx_skb);
1428                 lp->pending_tx_skb = NULL;
1429         }
1430 
1431         return 0;
1432 }
1433 
1434 /*
1435  * Ethtool support
1436  */
1437 static int
1438 smc911x_ethtool_get_link_ksettings(struct net_device *dev,
1439                                    struct ethtool_link_ksettings *cmd)
1440 {
1441         struct smc911x_local *lp = netdev_priv(dev);
1442         int status;
1443         unsigned long flags;
1444         u32 supported;
1445 
1446         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1447 
1448         if (lp->phy_type != 0) {
1449                 spin_lock_irqsave(&lp->lock, flags);
1450                 mii_ethtool_get_link_ksettings(&lp->mii, cmd);
1451                 spin_unlock_irqrestore(&lp->lock, flags);
1452         } else {
1453                 supported = SUPPORTED_10baseT_Half |
1454                                 SUPPORTED_10baseT_Full |
1455                                 SUPPORTED_TP | SUPPORTED_AUI;
1456 
1457                 if (lp->ctl_rspeed == 10)
1458                         cmd->base.speed = SPEED_10;
1459                 else if (lp->ctl_rspeed == 100)
1460                         cmd->base.speed = SPEED_100;
1461 
1462                 cmd->base.autoneg = AUTONEG_DISABLE;
1463                 cmd->base.port = 0;
1464                 SMC_GET_PHY_SPECIAL(lp, lp->mii.phy_id, status);
1465                 cmd->base.duplex =
1466                         (status & (PHY_SPECIAL_SPD_10FULL_ | PHY_SPECIAL_SPD_100FULL_)) ?
1467                                 DUPLEX_FULL : DUPLEX_HALF;
1468 
1469                 ethtool_convert_legacy_u32_to_link_mode(
1470                         cmd->link_modes.supported, supported);
1471 
1472         }
1473 
1474         return 0;
1475 }
1476 
1477 static int
1478 smc911x_ethtool_set_link_ksettings(struct net_device *dev,
1479                                    const struct ethtool_link_ksettings *cmd)
1480 {
1481         struct smc911x_local *lp = netdev_priv(dev);
1482         int ret;
1483         unsigned long flags;
1484 
1485         if (lp->phy_type != 0) {
1486                 spin_lock_irqsave(&lp->lock, flags);
1487                 ret = mii_ethtool_set_link_ksettings(&lp->mii, cmd);
1488                 spin_unlock_irqrestore(&lp->lock, flags);
1489         } else {
1490                 if (cmd->base.autoneg != AUTONEG_DISABLE ||
1491                     cmd->base.speed != SPEED_10 ||
1492                     (cmd->base.duplex != DUPLEX_HALF &&
1493                      cmd->base.duplex != DUPLEX_FULL) ||
1494                     (cmd->base.port != PORT_TP &&
1495                      cmd->base.port != PORT_AUI))
1496                         return -EINVAL;
1497 
1498                 lp->ctl_rfduplx = cmd->base.duplex == DUPLEX_FULL;
1499 
1500                 ret = 0;
1501         }
1502 
1503         return ret;
1504 }
1505 
1506 static void
1507 smc911x_ethtool_getdrvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1508 {
1509         strlcpy(info->driver, CARDNAME, sizeof(info->driver));
1510         strlcpy(info->version, version, sizeof(info->version));
1511         strlcpy(info->bus_info, dev_name(dev->dev.parent),
1512                 sizeof(info->bus_info));
1513 }
1514 
1515 static int smc911x_ethtool_nwayreset(struct net_device *dev)
1516 {
1517         struct smc911x_local *lp = netdev_priv(dev);
1518         int ret = -EINVAL;
1519         unsigned long flags;
1520 
1521         if (lp->phy_type != 0) {
1522                 spin_lock_irqsave(&lp->lock, flags);
1523                 ret = mii_nway_restart(&lp->mii);
1524                 spin_unlock_irqrestore(&lp->lock, flags);
1525         }
1526 
1527         return ret;
1528 }
1529 
1530 static u32 smc911x_ethtool_getmsglevel(struct net_device *dev)
1531 {
1532         struct smc911x_local *lp = netdev_priv(dev);
1533         return lp->msg_enable;
1534 }
1535 
1536 static void smc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1537 {
1538         struct smc911x_local *lp = netdev_priv(dev);
1539         lp->msg_enable = level;
1540 }
1541 
1542 static int smc911x_ethtool_getregslen(struct net_device *dev)
1543 {
1544         /* System regs + MAC regs + PHY regs */
1545         return (((E2P_CMD - ID_REV)/4 + 1) +
1546                         (WUCSR - MAC_CR)+1 + 32) * sizeof(u32);
1547 }
1548 
1549 static void smc911x_ethtool_getregs(struct net_device *dev,
1550                                                                                  struct ethtool_regs* regs, void *buf)
1551 {
1552         struct smc911x_local *lp = netdev_priv(dev);
1553         unsigned long flags;
1554         u32 reg,i,j=0;
1555         u32 *data = (u32*)buf;
1556 
1557         regs->version = lp->version;
1558         for(i=ID_REV;i<=E2P_CMD;i+=4) {
1559                 data[j++] = SMC_inl(lp, i);
1560         }
1561         for(i=MAC_CR;i<=WUCSR;i++) {
1562                 spin_lock_irqsave(&lp->lock, flags);
1563                 SMC_GET_MAC_CSR(lp, i, reg);
1564                 spin_unlock_irqrestore(&lp->lock, flags);
1565                 data[j++] = reg;
1566         }
1567         for(i=0;i<=31;i++) {
1568                 spin_lock_irqsave(&lp->lock, flags);
1569                 SMC_GET_MII(lp, i, lp->mii.phy_id, reg);
1570                 spin_unlock_irqrestore(&lp->lock, flags);
1571                 data[j++] = reg & 0xFFFF;
1572         }
1573 }
1574 
1575 static int smc911x_ethtool_wait_eeprom_ready(struct net_device *dev)
1576 {
1577         struct smc911x_local *lp = netdev_priv(dev);
1578         unsigned int timeout;
1579         int e2p_cmd;
1580 
1581         e2p_cmd = SMC_GET_E2P_CMD(lp);
1582         for(timeout=10;(e2p_cmd & E2P_CMD_EPC_BUSY_) && timeout; timeout--) {
1583                 if (e2p_cmd & E2P_CMD_EPC_TIMEOUT_) {
1584                         PRINTK(dev, "%s timeout waiting for EEPROM to respond\n",
1585                                __func__);
1586                         return -EFAULT;
1587                 }
1588                 mdelay(1);
1589                 e2p_cmd = SMC_GET_E2P_CMD(lp);
1590         }
1591         if (timeout == 0) {
1592                 PRINTK(dev, "%s timeout waiting for EEPROM CMD not busy\n",
1593                        __func__);
1594                 return -ETIMEDOUT;
1595         }
1596         return 0;
1597 }
1598 
1599 static inline int smc911x_ethtool_write_eeprom_cmd(struct net_device *dev,
1600                                                                                                         int cmd, int addr)
1601 {
1602         struct smc911x_local *lp = netdev_priv(dev);
1603         int ret;
1604 
1605         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1606                 return ret;
1607         SMC_SET_E2P_CMD(lp, E2P_CMD_EPC_BUSY_ |
1608                 ((cmd) & (0x7<<28)) |
1609                 ((addr) & 0xFF));
1610         return 0;
1611 }
1612 
1613 static inline int smc911x_ethtool_read_eeprom_byte(struct net_device *dev,
1614                                                                                                         u8 *data)
1615 {
1616         struct smc911x_local *lp = netdev_priv(dev);
1617         int ret;
1618 
1619         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1620                 return ret;
1621         *data = SMC_GET_E2P_DATA(lp);
1622         return 0;
1623 }
1624 
1625 static inline int smc911x_ethtool_write_eeprom_byte(struct net_device *dev,
1626                                                                                                          u8 data)
1627 {
1628         struct smc911x_local *lp = netdev_priv(dev);
1629         int ret;
1630 
1631         if ((ret = smc911x_ethtool_wait_eeprom_ready(dev))!=0)
1632                 return ret;
1633         SMC_SET_E2P_DATA(lp, data);
1634         return 0;
1635 }
1636 
1637 static int smc911x_ethtool_geteeprom(struct net_device *dev,
1638                                                                           struct ethtool_eeprom *eeprom, u8 *data)
1639 {
1640         u8 eebuf[SMC911X_EEPROM_LEN];
1641         int i, ret;
1642 
1643         for(i=0;i<SMC911X_EEPROM_LEN;i++) {
1644                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ_, i ))!=0)
1645                         return ret;
1646                 if ((ret=smc911x_ethtool_read_eeprom_byte(dev, &eebuf[i]))!=0)
1647                         return ret;
1648                 }
1649         memcpy(data, eebuf+eeprom->offset, eeprom->len);
1650         return 0;
1651 }
1652 
1653 static int smc911x_ethtool_seteeprom(struct net_device *dev,
1654                                                                            struct ethtool_eeprom *eeprom, u8 *data)
1655 {
1656         int i, ret;
1657 
1658         /* Enable erase */
1659         if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN_, 0 ))!=0)
1660                 return ret;
1661         for(i=eeprom->offset;i<(eeprom->offset+eeprom->len);i++) {
1662                 /* erase byte */
1663                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE_, i ))!=0)
1664                         return ret;
1665                 /* write byte */
1666                 if ((ret=smc911x_ethtool_write_eeprom_byte(dev, *data))!=0)
1667                          return ret;
1668                 if ((ret=smc911x_ethtool_write_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE_, i ))!=0)
1669                         return ret;
1670                 }
1671          return 0;
1672 }
1673 
1674 static int smc911x_ethtool_geteeprom_len(struct net_device *dev)
1675 {
1676          return SMC911X_EEPROM_LEN;
1677 }
1678 
1679 static const struct ethtool_ops smc911x_ethtool_ops = {
1680         .get_drvinfo     = smc911x_ethtool_getdrvinfo,
1681         .get_msglevel    = smc911x_ethtool_getmsglevel,
1682         .set_msglevel    = smc911x_ethtool_setmsglevel,
1683         .nway_reset = smc911x_ethtool_nwayreset,
1684         .get_link        = ethtool_op_get_link,
1685         .get_regs_len    = smc911x_ethtool_getregslen,
1686         .get_regs        = smc911x_ethtool_getregs,
1687         .get_eeprom_len = smc911x_ethtool_geteeprom_len,
1688         .get_eeprom = smc911x_ethtool_geteeprom,
1689         .set_eeprom = smc911x_ethtool_seteeprom,
1690         .get_link_ksettings      = smc911x_ethtool_get_link_ksettings,
1691         .set_link_ksettings      = smc911x_ethtool_set_link_ksettings,
1692 };
1693 
1694 /*
1695  * smc911x_findirq
1696  *
1697  * This routine has a simple purpose -- make the SMC chip generate an
1698  * interrupt, so an auto-detect routine can detect it, and find the IRQ,
1699  */
1700 static int smc911x_findirq(struct net_device *dev)
1701 {
1702         struct smc911x_local *lp = netdev_priv(dev);
1703         int timeout = 20;
1704         unsigned long cookie;
1705 
1706         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1707 
1708         cookie = probe_irq_on();
1709 
1710         /*
1711          * Force a SW interrupt
1712          */
1713 
1714         SMC_SET_INT_EN(lp, INT_EN_SW_INT_EN_);
1715 
1716         /*
1717          * Wait until positive that the interrupt has been generated
1718          */
1719         do {
1720                 int int_status;
1721                 udelay(10);
1722                 int_status = SMC_GET_INT_EN(lp);
1723                 if (int_status & INT_EN_SW_INT_EN_)
1724                          break;         /* got the interrupt */
1725         } while (--timeout);
1726 
1727         /*
1728          * there is really nothing that I can do here if timeout fails,
1729          * as autoirq_report will return a 0 anyway, which is what I
1730          * want in this case.    Plus, the clean up is needed in both
1731          * cases.
1732          */
1733 
1734         /* and disable all interrupts again */
1735         SMC_SET_INT_EN(lp, 0);
1736 
1737         /* and return what I found */
1738         return probe_irq_off(cookie);
1739 }
1740 
1741 static const struct net_device_ops smc911x_netdev_ops = {
1742         .ndo_open               = smc911x_open,
1743         .ndo_stop               = smc911x_close,
1744         .ndo_start_xmit         = smc911x_hard_start_xmit,
1745         .ndo_tx_timeout         = smc911x_timeout,
1746         .ndo_set_rx_mode        = smc911x_set_multicast_list,
1747         .ndo_validate_addr      = eth_validate_addr,
1748         .ndo_set_mac_address    = eth_mac_addr,
1749 #ifdef CONFIG_NET_POLL_CONTROLLER
1750         .ndo_poll_controller    = smc911x_poll_controller,
1751 #endif
1752 };
1753 
1754 /*
1755  * Function: smc911x_probe(unsigned long ioaddr)
1756  *
1757  * Purpose:
1758  *       Tests to see if a given ioaddr points to an SMC911x chip.
1759  *       Returns a 0 on success
1760  *
1761  * Algorithm:
1762  *       (1) see if the endian word is OK
1763  *       (1) see if I recognize the chip ID in the appropriate register
1764  *
1765  * Here I do typical initialization tasks.
1766  *
1767  * o  Initialize the structure if needed
1768  * o  print out my vanity message if not done so already
1769  * o  print out what type of hardware is detected
1770  * o  print out the ethernet address
1771  * o  find the IRQ
1772  * o  set up my private data
1773  * o  configure the dev structure with my subroutines
1774  * o  actually GRAB the irq.
1775  * o  GRAB the region
1776  */
1777 static int smc911x_probe(struct net_device *dev)
1778 {
1779         struct smc911x_local *lp = netdev_priv(dev);
1780         int i, retval;
1781         unsigned int val, chip_id, revision;
1782         const char *version_string;
1783         unsigned long irq_flags;
1784 #ifdef SMC_USE_DMA
1785         struct dma_slave_config config;
1786         dma_cap_mask_t mask;
1787 #endif
1788 
1789         DBG(SMC_DEBUG_FUNC, dev, "--> %s\n", __func__);
1790 
1791         /* First, see if the endian word is recognized */
1792         val = SMC_GET_BYTE_TEST(lp);
1793         DBG(SMC_DEBUG_MISC, dev, "%s: endian probe returned 0x%04x\n",
1794             CARDNAME, val);
1795         if (val != 0x87654321) {
1796                 netdev_err(dev, "Invalid chip endian 0x%08x\n", val);
1797                 retval = -ENODEV;
1798                 goto err_out;
1799         }
1800 
1801         /*
1802          * check if the revision register is something that I
1803          * recognize.   These might need to be added to later,
1804          * as future revisions could be added.
1805          */
1806         chip_id = SMC_GET_PN(lp);
1807         DBG(SMC_DEBUG_MISC, dev, "%s: id probe returned 0x%04x\n",
1808             CARDNAME, chip_id);
1809         for(i=0;chip_ids[i].id != 0; i++) {
1810                 if (chip_ids[i].id == chip_id) break;
1811         }
1812         if (!chip_ids[i].id) {
1813                 netdev_err(dev, "Unknown chip ID %04x\n", chip_id);
1814                 retval = -ENODEV;
1815                 goto err_out;
1816         }
1817         version_string = chip_ids[i].name;
1818 
1819         revision = SMC_GET_REV(lp);
1820         DBG(SMC_DEBUG_MISC, dev, "%s: revision = 0x%04x\n", CARDNAME, revision);
1821 
1822         /* At this point I'll assume that the chip is an SMC911x. */
1823         DBG(SMC_DEBUG_MISC, dev, "%s: Found a %s\n",
1824             CARDNAME, chip_ids[i].name);
1825 
1826         /* Validate the TX FIFO size requested */
1827         if ((tx_fifo_kb < 2) || (tx_fifo_kb > 14)) {
1828                 netdev_err(dev, "Invalid TX FIFO size requested %d\n",
1829                            tx_fifo_kb);
1830                 retval = -EINVAL;
1831                 goto err_out;
1832         }
1833 
1834         /* fill in some of the fields */
1835         lp->version = chip_ids[i].id;
1836         lp->revision = revision;
1837         lp->tx_fifo_kb = tx_fifo_kb;
1838         /* Reverse calculate the RX FIFO size from the TX */
1839         lp->tx_fifo_size=(lp->tx_fifo_kb<<10) - 512;
1840         lp->rx_fifo_size= ((0x4000 - 512 - lp->tx_fifo_size) / 16) * 15;
1841 
1842         /* Set the automatic flow control values */
1843         switch(lp->tx_fifo_kb) {
1844                 /*
1845                  *       AFC_HI is about ((Rx Data Fifo Size)*2/3)/64
1846                  *       AFC_LO is AFC_HI/2
1847                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1848                  */
1849                 case 2:/* 13440 Rx Data Fifo Size */
1850                         lp->afc_cfg=0x008C46AF;break;
1851                 case 3:/* 12480 Rx Data Fifo Size */
1852                         lp->afc_cfg=0x0082419F;break;
1853                 case 4:/* 11520 Rx Data Fifo Size */
1854                         lp->afc_cfg=0x00783C9F;break;
1855                 case 5:/* 10560 Rx Data Fifo Size */
1856                         lp->afc_cfg=0x006E374F;break;
1857                 case 6:/* 9600 Rx Data Fifo Size */
1858                         lp->afc_cfg=0x0064328F;break;
1859                 case 7:/* 8640 Rx Data Fifo Size */
1860                         lp->afc_cfg=0x005A2D7F;break;
1861                 case 8:/* 7680 Rx Data Fifo Size */
1862                         lp->afc_cfg=0x0050287F;break;
1863                 case 9:/* 6720 Rx Data Fifo Size */
1864                         lp->afc_cfg=0x0046236F;break;
1865                 case 10:/* 5760 Rx Data Fifo Size */
1866                         lp->afc_cfg=0x003C1E6F;break;
1867                 case 11:/* 4800 Rx Data Fifo Size */
1868                         lp->afc_cfg=0x0032195F;break;
1869                 /*
1870                  *       AFC_HI is ~1520 bytes less than RX Data Fifo Size
1871                  *       AFC_LO is AFC_HI/2
1872                  *       BACK_DUR is about 5uS*(AFC_LO) rounded down
1873                  */
1874                 case 12:/* 3840 Rx Data Fifo Size */
1875                         lp->afc_cfg=0x0024124F;break;
1876                 case 13:/* 2880 Rx Data Fifo Size */
1877                         lp->afc_cfg=0x0015073F;break;
1878                 case 14:/* 1920 Rx Data Fifo Size */
1879                         lp->afc_cfg=0x0006032F;break;
1880                  default:
1881                          PRINTK(dev, "ERROR -- no AFC_CFG setting found");
1882                          break;
1883         }
1884 
1885         DBG(SMC_DEBUG_MISC | SMC_DEBUG_TX | SMC_DEBUG_RX, dev,
1886             "%s: tx_fifo %d rx_fifo %d afc_cfg 0x%08x\n", CARDNAME,
1887             lp->tx_fifo_size, lp->rx_fifo_size, lp->afc_cfg);
1888 
1889         spin_lock_init(&lp->lock);
1890 
1891         /* Get the MAC address */
1892         SMC_GET_MAC_ADDR(lp, dev->dev_addr);
1893 
1894         /* now, reset the chip, and put it into a known state */
1895         smc911x_reset(dev);
1896 
1897         /*
1898          * If dev->irq is 0, then the device has to be banged on to see
1899          * what the IRQ is.
1900          *
1901          * Specifying an IRQ is done with the assumption that the user knows
1902          * what (s)he is doing.  No checking is done!!!!
1903          */
1904         if (dev->irq < 1) {
1905                 int trials;
1906 
1907                 trials = 3;
1908                 while (trials--) {
1909                         dev->irq = smc911x_findirq(dev);
1910                         if (dev->irq)
1911                                 break;
1912                         /* kick the card and try again */
1913                         smc911x_reset(dev);
1914                 }
1915         }
1916         if (dev->irq == 0) {
1917                 netdev_warn(dev, "Couldn't autodetect your IRQ. Use irq=xx.\n");
1918                 retval = -ENODEV;
1919                 goto err_out;
1920         }
1921         dev->irq = irq_canonicalize(dev->irq);
1922 
1923         dev->netdev_ops = &smc911x_netdev_ops;
1924         dev->watchdog_timeo = msecs_to_jiffies(watchdog);
1925         dev->ethtool_ops = &smc911x_ethtool_ops;
1926 
1927         INIT_WORK(&lp->phy_configure, smc911x_phy_configure);
1928         lp->mii.phy_id_mask = 0x1f;
1929         lp->mii.reg_num_mask = 0x1f;
1930         lp->mii.force_media = 0;
1931         lp->mii.full_duplex = 0;
1932         lp->mii.dev = dev;
1933         lp->mii.mdio_read = smc911x_phy_read;
1934         lp->mii.mdio_write = smc911x_phy_write;
1935 
1936         /*
1937          * Locate the phy, if any.
1938          */
1939         smc911x_phy_detect(dev);
1940 
1941         /* Set default parameters */
1942         lp->msg_enable = NETIF_MSG_LINK;
1943         lp->ctl_rfduplx = 1;
1944         lp->ctl_rspeed = 100;
1945 
1946 #ifdef SMC_DYNAMIC_BUS_CONFIG
1947         irq_flags = lp->cfg.irq_flags;
1948 #else
1949         irq_flags = IRQF_SHARED | SMC_IRQ_SENSE;
1950 #endif
1951 
1952         /* Grab the IRQ */
1953         retval = request_irq(dev->irq, smc911x_interrupt,
1954                              irq_flags, dev->name, dev);
1955         if (retval)
1956                 goto err_out;
1957 
1958 #ifdef SMC_USE_DMA
1959 
1960         dma_cap_zero(mask);
1961         dma_cap_set(DMA_SLAVE, mask);
1962         lp->rxdma = dma_request_channel(mask, NULL, NULL);
1963         lp->txdma = dma_request_channel(mask, NULL, NULL);
1964         lp->rxdma_active = 0;
1965         lp->txdma_active = 0;
1966 
1967         memset(&config, 0, sizeof(config));
1968         config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1969         config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1970         config.src_addr = lp->physaddr + RX_DATA_FIFO;
1971         config.dst_addr = lp->physaddr + TX_DATA_FIFO;
1972         config.src_maxburst = 32;
1973         config.dst_maxburst = 32;
1974         retval = dmaengine_slave_config(lp->rxdma, &config);
1975         if (retval) {
1976                 dev_err(lp->dev, "dma rx channel configuration failed: %d\n",
1977                         retval);
1978                 goto err_out;
1979         }
1980         retval = dmaengine_slave_config(lp->txdma, &config);
1981         if (retval) {
1982                 dev_err(lp->dev, "dma tx channel configuration failed: %d\n",
1983                         retval);
1984                 goto err_out;
1985         }
1986 #endif
1987 
1988         retval = register_netdev(dev);
1989         if (retval == 0) {
1990                 /* now, print out the card info, in a short format.. */
1991                 netdev_info(dev, "%s (rev %d) at %#lx IRQ %d",
1992                             version_string, lp->revision,
1993                             dev->base_addr, dev->irq);
1994 
1995 #ifdef SMC_USE_DMA
1996                 if (lp->rxdma)
1997                         pr_cont(" RXDMA %p", lp->rxdma);
1998 
1999                 if (lp->txdma)
2000                         pr_cont(" TXDMA %p", lp->txdma);
2001 #endif
2002                 pr_cont("\n");
2003                 if (!is_valid_ether_addr(dev->dev_addr)) {
2004                         netdev_warn(dev, "Invalid ethernet MAC address. Please set using ifconfig\n");
2005                 } else {
2006                         /* Print the Ethernet address */
2007                         netdev_info(dev, "Ethernet addr: %pM\n",
2008                                     dev->dev_addr);
2009                 }
2010 
2011                 if (lp->phy_type == 0) {
2012                         PRINTK(dev, "No PHY found\n");
2013                 } else if ((lp->phy_type & ~0xff) == LAN911X_INTERNAL_PHY_ID) {
2014                         PRINTK(dev, "LAN911x Internal PHY\n");
2015                 } else {
2016                         PRINTK(dev, "External PHY 0x%08x\n", lp->phy_type);
2017                 }
2018         }
2019 
2020 err_out:
2021 #ifdef SMC_USE_DMA
2022         if (retval) {
2023                 if (lp->rxdma)
2024                         dma_release_channel(lp->rxdma);
2025                 if (lp->txdma)
2026                         dma_release_channel(lp->txdma);
2027         }
2028 #endif
2029         return retval;
2030 }
2031 
2032 /*
2033  * smc911x_drv_probe(void)
2034  *
2035  *        Output:
2036  *       0 --> there is a device
2037  *       anything else, error
2038  */
2039 static int smc911x_drv_probe(struct platform_device *pdev)
2040 {
2041         struct net_device *ndev;
2042         struct resource *res;
2043         struct smc911x_local *lp;
2044         void __iomem *addr;
2045         int ret;
2046 
2047         /* ndev is not valid yet, so avoid passing it in. */
2048         DBG(SMC_DEBUG_FUNC, "--> %s\n",  __func__);
2049         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2050         if (!res) {
2051                 ret = -ENODEV;
2052                 goto out;
2053         }
2054 
2055         /*
2056          * Request the regions.
2057          */
2058         if (!request_mem_region(res->start, SMC911X_IO_EXTENT, CARDNAME)) {
2059                  ret = -EBUSY;
2060                  goto out;
2061         }
2062 
2063         ndev = alloc_etherdev(sizeof(struct smc911x_local));
2064         if (!ndev) {
2065                 ret = -ENOMEM;
2066                 goto release_1;
2067         }
2068         SET_NETDEV_DEV(ndev, &pdev->dev);
2069 
2070         ndev->dma = (unsigned char)-1;
2071         ndev->irq = platform_get_irq(pdev, 0);
2072         lp = netdev_priv(ndev);
2073         lp->netdev = ndev;
2074 #ifdef SMC_DYNAMIC_BUS_CONFIG
2075         {
2076                 struct smc911x_platdata *pd = dev_get_platdata(&pdev->dev);
2077                 if (!pd) {
2078                         ret = -EINVAL;
2079                         goto release_both;
2080                 }
2081                 memcpy(&lp->cfg, pd, sizeof(lp->cfg));
2082         }
2083 #endif
2084 
2085         addr = ioremap(res->start, SMC911X_IO_EXTENT);
2086         if (!addr) {
2087                 ret = -ENOMEM;
2088                 goto release_both;
2089         }
2090 
2091         platform_set_drvdata(pdev, ndev);
2092         lp->base = addr;
2093         ndev->base_addr = res->start;
2094         ret = smc911x_probe(ndev);
2095         if (ret != 0) {
2096                 iounmap(addr);
2097 release_both:
2098                 free_netdev(ndev);
2099 release_1:
2100                 release_mem_region(res->start, SMC911X_IO_EXTENT);
2101 out:
2102                 pr_info("%s: not found (%d).\n", CARDNAME, ret);
2103         }
2104 #ifdef SMC_USE_DMA
2105         else {
2106                 lp->physaddr = res->start;
2107                 lp->dev = &pdev->dev;
2108         }
2109 #endif
2110 
2111         return ret;
2112 }
2113 
2114 static int smc911x_drv_remove(struct platform_device *pdev)
2115 {
2116         struct net_device *ndev = platform_get_drvdata(pdev);
2117         struct smc911x_local *lp = netdev_priv(ndev);
2118         struct resource *res;
2119 
2120         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2121 
2122         unregister_netdev(ndev);
2123 
2124         free_irq(ndev->irq, ndev);
2125 
2126 #ifdef SMC_USE_DMA
2127         {
2128                 if (lp->rxdma)
2129                         dma_release_channel(lp->rxdma);
2130                 if (lp->txdma)
2131                         dma_release_channel(lp->txdma);
2132         }
2133 #endif
2134         iounmap(lp->base);
2135         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2136         release_mem_region(res->start, SMC911X_IO_EXTENT);
2137 
2138         free_netdev(ndev);
2139         return 0;
2140 }
2141 
2142 static int smc911x_drv_suspend(struct platform_device *dev, pm_message_t state)
2143 {
2144         struct net_device *ndev = platform_get_drvdata(dev);
2145         struct smc911x_local *lp = netdev_priv(ndev);
2146 
2147         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2148         if (ndev) {
2149                 if (netif_running(ndev)) {
2150                         netif_device_detach(ndev);
2151                         smc911x_shutdown(ndev);
2152 #if POWER_DOWN
2153                         /* Set D2 - Energy detect only setting */
2154                         SMC_SET_PMT_CTRL(lp, 2<<12);
2155 #endif
2156                 }
2157         }
2158         return 0;
2159 }
2160 
2161 static int smc911x_drv_resume(struct platform_device *dev)
2162 {
2163         struct net_device *ndev = platform_get_drvdata(dev);
2164 
2165         DBG(SMC_DEBUG_FUNC, ndev, "--> %s\n", __func__);
2166         if (ndev) {
2167                 struct smc911x_local *lp = netdev_priv(ndev);
2168 
2169                 if (netif_running(ndev)) {
2170                         smc911x_reset(ndev);
2171                         if (lp->phy_type != 0)
2172                                 smc911x_phy_configure(&lp->phy_configure);
2173                         smc911x_enable(ndev);
2174                         netif_device_attach(ndev);
2175                 }
2176         }
2177         return 0;
2178 }
2179 
2180 static struct platform_driver smc911x_driver = {
2181         .probe           = smc911x_drv_probe,
2182         .remove  = smc911x_drv_remove,
2183         .suspend         = smc911x_drv_suspend,
2184         .resume  = smc911x_drv_resume,
2185         .driver  = {
2186                 .name    = CARDNAME,
2187         },
2188 };
2189 
2190 module_platform_driver(smc911x_driver);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/smsc/smc911x.c

DEFINITIONS
