drivers/net/arm/am79c961a.c

   1 /*
   2  *  linux/drivers/net/am79c961.c
   3  *
   4  *  by Russell King <rmk@arm.linux.org.uk> 1995-2001.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Derived from various things including skeleton.c
  11  *
  12  * This is a special driver for the am79c961A Lance chip used in the
  13  * Intel (formally Digital Equipment Corp) EBSA110 platform.  Please
  14  * note that this can not be built as a module (it doesn't make sense).
  15  */
  16 #include <linux/kernel.h>
  17 #include <linux/types.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/ioport.h>
  20 #include <linux/slab.h>
  21 #include <linux/string.h>
  22 #include <linux/errno.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/delay.h>
  26 #include <linux/init.h>
  27 #include <linux/crc32.h>
  28 #include <linux/bitops.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/io.h>
  31
  32 #include <mach/hardware.h>
  33 #include <asm/system.h>
  34
  35 #define TX_BUFFERS 15
  36 #define RX_BUFFERS 25
  37
  38 #include "am79c961a.h"
  39
  40 static irqreturn_t
  41 am79c961_interrupt (int irq, void *dev_id);
  42
  43 static unsigned int net_debug = NET_DEBUG;
  44
  45 static const char version[] =
  46         "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n";
  47
  48 /* --------------------------------------------------------------------------- */
  49
  50 #ifdef __arm__
  51 static void write_rreg(u_long base, u_int reg, u_int val)
  52 {
  53         asm volatile(
  54         "str%?h %1, [%2]        @ NET_RAP\n\t"
  55         "str%?h %0, [%2, #-4]   @ NET_RDP"
  56         :
  57         : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
  58 }
  59
  60 static inline unsigned short read_rreg(u_long base_addr, u_int reg)
  61 {
  62         unsigned short v;
  63         asm volatile(
  64         "str%?h %1, [%2]        @ NET_RAP\n\t"
  65         "ldr%?h %0, [%2, #-4]   @ NET_RDP"
  66         : "=r" (v)
  67         : "r" (reg), "r" (ISAIO_BASE + 0x0464));
  68         return v;
  69 }
  70
  71 static inline void write_ireg(u_long base, u_int reg, u_int val)
  72 {
  73         asm volatile(
  74         "str%?h %1, [%2]        @ NET_RAP\n\t"
  75         "str%?h %0, [%2, #8]    @ NET_IDP"
  76         :
  77         : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
  78 }
  79
  80 static inline unsigned short read_ireg(u_long base_addr, u_int reg)
  81 {
  82         u_short v;
  83         asm volatile(
  84         "str%?h %1, [%2]        @ NAT_RAP\n\t"
  85         "ldr%?h %0, [%2, #8]    @ NET_IDP\n\t"
  86         : "=r" (v)
  87         : "r" (reg), "r" (ISAIO_BASE + 0x0464));
  88         return v;
  89 }
  90
  91 #define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1))
  92 #define am_readword(dev,off)      __raw_readw(ISAMEM_BASE + ((off) << 1))
  93
  94 static void
  95 am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
  96 {
  97         offset = ISAMEM_BASE + (offset << 1);
  98         length = (length + 1) & ~1;
  99         if ((int)buf & 2) {
 100                 asm volatile("str%?h    %2, [%0], #4"
 101                  : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
 102                 buf += 2;
 103                 length -= 2;
 104         }
 105         while (length > 8) {
 106                 register unsigned int tmp asm("r2"), tmp2 asm("r3");
 107                 asm volatile(
 108                         "ldm%?ia        %0!, {%1, %2}"
 109                         : "+r" (buf), "=&r" (tmp), "=&r" (tmp2));
 110                 length -= 8;
 111                 asm volatile(
 112                         "str%?h %1, [%0], #4\n\t"
 113                         "mov%?  %1, %1, lsr #16\n\t"
 114                         "str%?h %1, [%0], #4\n\t"
 115                         "str%?h %2, [%0], #4\n\t"
 116                         "mov%?  %2, %2, lsr #16\n\t"
 117                         "str%?h %2, [%0], #4"
 118                 : "+r" (offset), "=&r" (tmp), "=&r" (tmp2));
 119         }
 120         while (length > 0) {
 121                 asm volatile("str%?h    %2, [%0], #4"
 122                  : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
 123                 buf += 2;
 124                 length -= 2;
 125         }
 126 }
 127
 128 static void
 129 am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
 130 {
 131         offset = ISAMEM_BASE + (offset << 1);
 132         length = (length + 1) & ~1;
 133         if ((int)buf & 2) {
 134                 unsigned int tmp;
 135                 asm volatile(
 136                         "ldr%?h %2, [%0], #4\n\t"
 137                         "str%?b %2, [%1], #1\n\t"
 138                         "mov%?  %2, %2, lsr #8\n\t"
 139                         "str%?b %2, [%1], #1"
 140                 : "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf));
 141                 length -= 2;
 142         }
 143         while (length > 8) {
 144                 register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3;
 145                 asm volatile(
 146                         "ldr%?h %2, [%0], #4\n\t"
 147                         "ldr%?h %4, [%0], #4\n\t"
 148                         "ldr%?h %3, [%0], #4\n\t"
 149                         "orr%?  %2, %2, %4, lsl #16\n\t"
 150                         "ldr%?h %4, [%0], #4\n\t"
 151                         "orr%?  %3, %3, %4, lsl #16\n\t"
 152                         "stm%?ia        %1!, {%2, %3}"
 153                 : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3)
 154                 : "0" (offset), "1" (buf));
 155                 length -= 8;
 156         }
 157         while (length > 0) {
 158                 unsigned int tmp;
 159                 asm volatile(
 160                         "ldr%?h %2, [%0], #4\n\t"
 161                         "str%?b %2, [%1], #1\n\t"
 162                         "mov%?  %2, %2, lsr #8\n\t"
 163                         "str%?b %2, [%1], #1"
 164                 : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf));
 165                 length -= 2;
 166         }
 167 }
 168 #else
 169 #error Not compatible
 170 #endif
 171
 172 static int
 173 am79c961_ramtest(struct net_device *dev, unsigned int val)
 174 {
 175         unsigned char *buffer = kmalloc (65536, GFP_KERNEL);
 176         int i, error = 0, errorcount = 0;
 177
 178         if (!buffer)
 179                 return 0;
 180         memset (buffer, val, 65536);
 181         am_writebuffer(dev, 0, buffer, 65536);
 182         memset (buffer, val ^ 255, 65536);
 183         am_readbuffer(dev, 0, buffer, 65536);
 184         for (i = 0; i < 65536; i++) {
 185                 if (buffer[i] != val && !error) {
 186                         printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i);
 187                         error = 1;
 188                         errorcount ++;
 189                 } else if (error && buffer[i] == val) {
 190                         printk ("%05X\n", i);
 191                         error = 0;
 192                 }
 193         }
 194         if (error)
 195                 printk ("10000\n");
 196         kfree (buffer);
 197         return errorcount;
 198 }
 199
 200 static void am79c961_mc_hash(char *addr, u16 *hash)
 201 {
 202         int idx, bit;
 203         u32 crc;
 204
 205         crc = ether_crc_le(ETH_ALEN, addr);
 206
 207         idx = crc >> 30;
 208         bit = (crc >> 26) & 15;
 209
 210         hash[idx] |= 1 << bit;
 211 }
 212
 213 static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash)
 214 {
 215         unsigned int mode = MODE_PORT_10BT;
 216
 217         if (dev->flags & IFF_PROMISC) {
 218                 mode |= MODE_PROMISC;
 219                 memset(hash, 0xff, 4 * sizeof(*hash));
 220         } else if (dev->flags & IFF_ALLMULTI) {
 221                 memset(hash, 0xff, 4 * sizeof(*hash));
 222         } else {
 223                 struct netdev_hw_addr *ha;
 224
 225                 memset(hash, 0, 4 * sizeof(*hash));
 226
 227                 netdev_for_each_mc_addr(ha, dev)
 228                         am79c961_mc_hash(ha->addr, hash);
 229         }
 230
 231         return mode;
 232 }
 233
 234 static void
 235 am79c961_init_for_open(struct net_device *dev)
 236 {
 237         struct dev_priv *priv = netdev_priv(dev);
 238         unsigned long flags;
 239         unsigned char *p;
 240         u_int hdr_addr, first_free_addr;
 241         u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
 242         int i;
 243
 244         /*
 245          * Stop the chip.
 246          */
 247         spin_lock_irqsave(&priv->chip_lock, flags);
 248         write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP);
 249         spin_unlock_irqrestore(&priv->chip_lock, flags);
 250
 251         write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */
 252         write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */
 253         write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */
 254         write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */
 255
 256         for (i = LADRL; i <= LADRH; i++)
 257                 write_rreg (dev->base_addr, i, multi_hash[i - LADRL]);
 258
 259         for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2)
 260                 write_rreg (dev->base_addr, i, p[0] | (p[1] << 8));
 261
 262         write_rreg (dev->base_addr, MODE, mode);
 263         write_rreg (dev->base_addr, POLLINT, 0);
 264         write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS);
 265         write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS);
 266
 267         first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16;
 268         hdr_addr = 0;
 269
 270         priv->rxhead = 0;
 271         priv->rxtail = 0;
 272         priv->rxhdr = hdr_addr;
 273
 274         for (i = 0; i < RX_BUFFERS; i++) {
 275                 priv->rxbuffer[i] = first_free_addr;
 276                 am_writeword (dev, hdr_addr, first_free_addr);
 277                 am_writeword (dev, hdr_addr + 2, RMD_OWN);
 278                 am_writeword (dev, hdr_addr + 4, (-1600));
 279                 am_writeword (dev, hdr_addr + 6, 0);
 280                 first_free_addr += 1600;
 281                 hdr_addr += 8;
 282         }
 283         priv->txhead = 0;
 284         priv->txtail = 0;
 285         priv->txhdr = hdr_addr;
 286         for (i = 0; i < TX_BUFFERS; i++) {
 287                 priv->txbuffer[i] = first_free_addr;
 288                 am_writeword (dev, hdr_addr, first_free_addr);
 289                 am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP);
 290                 am_writeword (dev, hdr_addr + 4, 0xf000);
 291                 am_writeword (dev, hdr_addr + 6, 0);
 292                 first_free_addr += 1600;
 293                 hdr_addr += 8;
 294         }
 295
 296         write_rreg (dev->base_addr, BASERXL, priv->rxhdr);
 297         write_rreg (dev->base_addr, BASERXH, 0);
 298         write_rreg (dev->base_addr, BASETXL, priv->txhdr);
 299         write_rreg (dev->base_addr, BASERXH, 0);
 300         write_rreg (dev->base_addr, CSR0, CSR0_STOP);
 301         write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO);
 302         write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM);
 303         write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT);
 304 }
 305
 306 static void am79c961_timer(unsigned long data)
 307 {
 308         struct net_device *dev = (struct net_device *)data;
 309         struct dev_priv *priv = netdev_priv(dev);
 310         unsigned int lnkstat, carrier;
 311         unsigned long flags;
 312
 313         spin_lock_irqsave(&priv->chip_lock, flags);
 314         lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST;
 315         spin_unlock_irqrestore(&priv->chip_lock, flags);
 316         carrier = netif_carrier_ok(dev);
 317
 318         if (lnkstat && !carrier) {
 319                 netif_carrier_on(dev);
 320                 printk("%s: link up\n", dev->name);
 321         } else if (!lnkstat && carrier) {
 322                 netif_carrier_off(dev);
 323                 printk("%s: link down\n", dev->name);
 324         }
 325
 326         mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500));
 327 }
 328
 329 /*
 330  * Open/initialize the board.
 331  */
 332 static int
 333 am79c961_open(struct net_device *dev)
 334 {
 335         struct dev_priv *priv = netdev_priv(dev);
 336         int ret;
 337
 338         ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev);
 339         if (ret)
 340                 return ret;
 341
 342         am79c961_init_for_open(dev);
 343
 344         netif_carrier_off(dev);
 345
 346         priv->timer.expires = jiffies;
 347         add_timer(&priv->timer);
 348
 349         netif_start_queue(dev);
 350
 351         return 0;
 352 }
 353
 354 /*
 355  * The inverse routine to am79c961_open().
 356  */
 357 static int
 358 am79c961_close(struct net_device *dev)
 359 {
 360         struct dev_priv *priv = netdev_priv(dev);
 361         unsigned long flags;
 362
 363         del_timer_sync(&priv->timer);
 364
 365         netif_stop_queue(dev);
 366         netif_carrier_off(dev);
 367
 368         spin_lock_irqsave(&priv->chip_lock, flags);
 369         write_rreg (dev->base_addr, CSR0, CSR0_STOP);
 370         write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
 371         spin_unlock_irqrestore(&priv->chip_lock, flags);
 372
 373         free_irq (dev->irq, dev);
 374
 375         return 0;
 376 }
 377
 378 /*
 379  * Set or clear promiscuous/multicast mode filter for this adapter.
 380  */
 381 static void am79c961_setmulticastlist (struct net_device *dev)
 382 {
 383         struct dev_priv *priv = netdev_priv(dev);
 384         unsigned long flags;
 385         u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
 386         int i, stopped;
 387
 388         spin_lock_irqsave(&priv->chip_lock, flags);
 389
 390         stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP;
 391
 392         if (!stopped) {
 393                 /*
 394                  * Put the chip into suspend mode
 395                  */
 396                 write_rreg(dev->base_addr, CTRL1, CTRL1_SPND);
 397
 398                 /*
 399                  * Spin waiting for chip to report suspend mode
 400                  */
 401                 while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) {
 402                         spin_unlock_irqrestore(&priv->chip_lock, flags);
 403                         nop();
 404                         spin_lock_irqsave(&priv->chip_lock, flags);
 405                 }
 406         }
 407
 408         /*
 409          * Update the multicast hash table
 410          */
 411         for (i = 0; i < ARRAY_SIZE(multi_hash); i++)
 412                 write_rreg(dev->base_addr, i + LADRL, multi_hash[i]);
 413
 414         /*
 415          * Write the mode register
 416          */
 417         write_rreg(dev->base_addr, MODE, mode);
 418
 419         if (!stopped) {
 420                 /*
 421                  * Put the chip back into running mode
 422                  */
 423                 write_rreg(dev->base_addr, CTRL1, 0);
 424         }
 425
 426         spin_unlock_irqrestore(&priv->chip_lock, flags);
 427 }
 428
 429 static void am79c961_timeout(struct net_device *dev)
 430 {
 431         printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n",
 432                 dev->name);
 433
 434         /*
 435          * ought to do some setup of the tx side here
 436          */
 437
 438         netif_wake_queue(dev);
 439 }
 440
 441 /*
 442  * Transmit a packet
 443  */
 444 static int
 445 am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev)
 446 {
 447         struct dev_priv *priv = netdev_priv(dev);
 448         unsigned int hdraddr, bufaddr;
 449         unsigned int head;
 450         unsigned long flags;
 451
 452         head = priv->txhead;
 453         hdraddr = priv->txhdr + (head << 3);
 454         bufaddr = priv->txbuffer[head];
 455         head += 1;
 456         if (head >= TX_BUFFERS)
 457                 head = 0;
 458
 459         am_writebuffer (dev, bufaddr, skb->data, skb->len);
 460         am_writeword (dev, hdraddr + 4, -skb->len);
 461         am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP);
 462         priv->txhead = head;
 463
 464         spin_lock_irqsave(&priv->chip_lock, flags);
 465         write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA);
 466         spin_unlock_irqrestore(&priv->chip_lock, flags);
 467
 468         /*
 469          * If the next packet is owned by the ethernet device,
 470          * then the tx ring is full and we can't add another
 471          * packet.
 472          */
 473         if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN)
 474                 netif_stop_queue(dev);
 475
 476         dev_kfree_skb(skb);
 477
 478         return NETDEV_TX_OK;
 479 }
 480
 481 /*
 482  * If we have a good packet(s), get it/them out of the buffers.
 483  */
 484 static void
 485 am79c961_rx(struct net_device *dev, struct dev_priv *priv)
 486 {
 487         do {
 488                 struct sk_buff *skb;
 489                 u_int hdraddr;
 490                 u_int pktaddr;
 491                 u_int status;
 492                 int len;
 493
 494                 hdraddr = priv->rxhdr + (priv->rxtail << 3);
 495                 pktaddr = priv->rxbuffer[priv->rxtail];
 496
 497                 status = am_readword (dev, hdraddr + 2);
 498                 if (status & RMD_OWN) /* do we own it? */
 499                         break;
 500
 501                 priv->rxtail ++;
 502                 if (priv->rxtail >= RX_BUFFERS)
 503                         priv->rxtail = 0;
 504
 505                 if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) {
 506                         am_writeword (dev, hdraddr + 2, RMD_OWN);
 507                         dev->stats.rx_errors++;
 508                         if (status & RMD_ERR) {
 509                                 if (status & RMD_FRAM)
 510                                         dev->stats.rx_frame_errors++;
 511                                 if (status & RMD_CRC)
 512                                         dev->stats.rx_crc_errors++;
 513                         } else if (status & RMD_STP)
 514                                 dev->stats.rx_length_errors++;
 515                         continue;
 516                 }
 517
 518                 len = am_readword(dev, hdraddr + 6);
 519                 skb = dev_alloc_skb(len + 2);
 520
 521                 if (skb) {
 522                         skb_reserve(skb, 2);
 523
 524                         am_readbuffer(dev, pktaddr, skb_put(skb, len), len);
 525                         am_writeword(dev, hdraddr + 2, RMD_OWN);
 526                         skb->protocol = eth_type_trans(skb, dev);
 527                         netif_rx(skb);
 528                         dev->stats.rx_bytes += len;
 529                         dev->stats.rx_packets++;
 530                 } else {
 531                         am_writeword (dev, hdraddr + 2, RMD_OWN);
 532                         printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name);
 533                         dev->stats.rx_dropped++;
 534                         break;
 535                 }
 536         } while (1);
 537 }
 538
 539 /*
 540  * Update stats for the transmitted packet
 541  */
 542 static void
 543 am79c961_tx(struct net_device *dev, struct dev_priv *priv)
 544 {
 545         do {
 546                 short len;
 547                 u_int hdraddr;
 548                 u_int status;
 549
 550                 hdraddr = priv->txhdr + (priv->txtail << 3);
 551                 status = am_readword (dev, hdraddr + 2);
 552                 if (status & TMD_OWN)
 553                         break;
 554
 555                 priv->txtail ++;
 556                 if (priv->txtail >= TX_BUFFERS)
 557                         priv->txtail = 0;
 558
 559                 if (status & TMD_ERR) {
 560                         u_int status2;
 561
 562                         dev->stats.tx_errors++;
 563
 564                         status2 = am_readword (dev, hdraddr + 6);
 565
 566                         /*
 567                          * Clear the error byte
 568                          */
 569                         am_writeword (dev, hdraddr + 6, 0);
 570
 571                         if (status2 & TST_RTRY)
 572                                 dev->stats.collisions += 16;
 573                         if (status2 & TST_LCOL)
 574                                 dev->stats.tx_window_errors++;
 575                         if (status2 & TST_LCAR)
 576                                 dev->stats.tx_carrier_errors++;
 577                         if (status2 & TST_UFLO)
 578                                 dev->stats.tx_fifo_errors++;
 579                         continue;
 580                 }
 581                 dev->stats.tx_packets++;
 582                 len = am_readword (dev, hdraddr + 4);
 583                 dev->stats.tx_bytes += -len;
 584         } while (priv->txtail != priv->txhead);
 585
 586         netif_wake_queue(dev);
 587 }
 588
 589 static irqreturn_t
 590 am79c961_interrupt(int irq, void *dev_id)
 591 {
 592         struct net_device *dev = (struct net_device *)dev_id;
 593         struct dev_priv *priv = netdev_priv(dev);
 594         u_int status, n = 100;
 595         int handled = 0;
 596
 597         do {
 598                 status = read_rreg(dev->base_addr, CSR0);
 599                 write_rreg(dev->base_addr, CSR0, status &
 600                            (CSR0_IENA|CSR0_TINT|CSR0_RINT|
 601                             CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL));
 602
 603                 if (status & CSR0_RINT) {
 604                         handled = 1;
 605                         am79c961_rx(dev, priv);
 606                 }
 607                 if (status & CSR0_TINT) {
 608                         handled = 1;
 609                         am79c961_tx(dev, priv);
 610                 }
 611                 if (status & CSR0_MISS) {
 612                         handled = 1;
 613                         dev->stats.rx_dropped++;
 614                 }
 615                 if (status & CSR0_CERR) {
 616                         handled = 1;
 617                         mod_timer(&priv->timer, jiffies);
 618                 }
 619         } while (--n && status & (CSR0_RINT | CSR0_TINT));
 620
 621         return IRQ_RETVAL(handled);
 622 }
 623
 624 #ifdef CONFIG_NET_POLL_CONTROLLER
 625 static void am79c961_poll_controller(struct net_device *dev)
 626 {
 627         unsigned long flags;
 628         local_irq_save(flags);
 629         am79c961_interrupt(dev->irq, dev);
 630         local_irq_restore(flags);
 631 }
 632 #endif
 633
 634 /*
 635  * Initialise the chip.  Note that we always expect
 636  * to be entered with interrupts enabled.
 637  */
 638 static int
 639 am79c961_hw_init(struct net_device *dev)
 640 {
 641         struct dev_priv *priv = netdev_priv(dev);
 642
 643         spin_lock_irq(&priv->chip_lock);
 644         write_rreg (dev->base_addr, CSR0, CSR0_STOP);
 645         write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
 646         spin_unlock_irq(&priv->chip_lock);
 647
 648         am79c961_ramtest(dev, 0x66);
 649         am79c961_ramtest(dev, 0x99);
 650
 651         return 0;
 652 }
 653
 654 static void __init am79c961_banner(void)
 655 {
 656         static unsigned version_printed;
 657
 658         if (net_debug && version_printed++ == 0)
 659                 printk(KERN_INFO "%s", version);
 660 }
 661 static const struct net_device_ops am79c961_netdev_ops = {
 662         .ndo_open               = am79c961_open,
 663         .ndo_stop               = am79c961_close,
 664         .ndo_start_xmit         = am79c961_sendpacket,
 665         .ndo_set_multicast_list = am79c961_setmulticastlist,
 666         .ndo_tx_timeout         = am79c961_timeout,
 667         .ndo_validate_addr      = eth_validate_addr,
 668         .ndo_change_mtu         = eth_change_mtu,
 669         .ndo_set_mac_address    = eth_mac_addr,
 670 #ifdef CONFIG_NET_POLL_CONTROLLER
 671         .ndo_poll_controller    = am79c961_poll_controller,
 672 #endif
 673 };
 674
 675 static int __devinit am79c961_probe(struct platform_device *pdev)
 676 {
 677         struct resource *res;
 678         struct net_device *dev;
 679         struct dev_priv *priv;
 680         int i, ret;
 681
 682         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 683         if (!res)
 684                 return -ENODEV;
 685
 686         dev = alloc_etherdev(sizeof(struct dev_priv));
 687         ret = -ENOMEM;
 688         if (!dev)
 689                 goto out;
 690
 691         SET_NETDEV_DEV(dev, &pdev->dev);
 692
 693         priv = netdev_priv(dev);
 694
 695         /*
 696          * Fixed address and IRQ lines here.
 697          * The PNP initialisation should have been
 698          * done by the ether bootp loader.
 699          */
 700         dev->base_addr = res->start;
 701         ret = platform_get_irq(pdev, 0);
 702
 703         if (ret < 0) {
 704                 ret = -ENODEV;
 705                 goto nodev;
 706         }
 707         dev->irq = ret;
 708
 709         ret = -ENODEV;
 710         if (!request_region(dev->base_addr, 0x18, dev->name))
 711                 goto nodev;
 712
 713         /*
 714          * Reset the device.
 715          */
 716         inb(dev->base_addr + NET_RESET);
 717         udelay(5);
 718
 719         /*
 720          * Check the manufacturer part of the
 721          * ether address.
 722          */
 723         if (inb(dev->base_addr) != 0x08 ||
 724             inb(dev->base_addr + 2) != 0x00 ||
 725             inb(dev->base_addr + 4) != 0x2b)
 726                 goto release;
 727
 728         for (i = 0; i < 6; i++)
 729                 dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff;
 730
 731         am79c961_banner();
 732
 733         spin_lock_init(&priv->chip_lock);
 734         init_timer(&priv->timer);
 735         priv->timer.data = (unsigned long)dev;
 736         priv->timer.function = am79c961_timer;
 737
 738         if (am79c961_hw_init(dev))
 739                 goto release;
 740
 741         dev->netdev_ops = &am79c961_netdev_ops;
 742
 743         ret = register_netdev(dev);
 744         if (ret == 0) {
 745                 printk(KERN_INFO "%s: ether address %pM\n",
 746                        dev->name, dev->dev_addr);
 747                 return 0;
 748         }
 749
 750 release:
 751         release_region(dev->base_addr, 0x18);
 752 nodev:
 753         free_netdev(dev);
 754 out:
 755         return ret;
 756 }
 757
 758 static struct platform_driver am79c961_driver = {
 759         .probe          = am79c961_probe,
 760         .driver         = {
 761                 .name   = "am79c961",
 762         },
 763 };
 764
 765 static int __init am79c961_init(void)
 766 {
 767         return platform_driver_register(&am79c961_driver);
 768 }
 769
 770 __initcall(am79c961_init);