drivers/net/at1700.c

/* */
This source file includes following definitions.
at1700_probe
at1700_probe1
read_eeprom
net_open
net_send_packet
net_interrupt
net_rx
net_close
net_get_stats
set_multicast_list
   1 /* at1700.c: A network device driver for  the Allied Telesis AT1700.
   2 
   3    Written 1993 by Donald Becker.  This is a alpha test limited release.
   4    This version may only be used and distributed according to the terms of the
   5    GNU Public License, incorporated herein by reference.
   6 
   7    The author may be reached as becker@super.org or
   8    C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
   9 
  10    This is a device driver for the Allied Telesis AT1700, which is a
  11    straight-foward Fujitsu MB86965 implementation.
  12 */
  13 
  14 static char *version =
  15         "at1700.c:v0.03 11/16/93  Donald Becker (becker@super.org)\n";
  16 
  17 #include <linux/config.h>
  18 
  19 /*
  20   Sources:
  21     The Fujitsu MB86695 datasheet.
  22 */
  23 
  24 #include <linux/kernel.h>
  25 #include <linux/sched.h>
  26 #include <linux/types.h>
  27 #include <linux/fcntl.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/ptrace.h>
  30 #include <linux/ioport.h>
  31 #include <linux/in.h>
  32 #include <linux/malloc.h>
  33 #include <asm/system.h>
  34 #include <asm/bitops.h>
  35 #include <asm/io.h>
  36 #include <asm/dma.h>
  37 #include <errno.h>
  38 #include <memory.h>
  39 
  40 #include "dev.h"
  41 #include "eth.h"
  42 #include "skbuff.h"
  43 #include "arp.h"
  44 
  45 #ifndef HAVE_AUTOIRQ
  46 /* From auto_irq.c, in ioport.h for later versions. */
  47 extern void autoirq_setup(int waittime);
  48 extern int autoirq_report(int waittime);
  49 /* The map from IRQ number (as passed to the interrupt handler) to
  50    'struct device'. */
  51 extern struct device *irq2dev_map[16];
  52 #endif
  53 
  54 #ifndef HAVE_ALLOC_SKB
  55 #define alloc_skb(size, priority) (struct sk_buff *) kmalloc(size,priority)
  56 #define kfree_skbmem(addr, size) kfree_s(addr,size);
  57 #endif
  58 
  59 /* use 0 for production, 1 for verification, >2 for debug */
  60 #ifndef NET_DEBUG
  61 #define NET_DEBUG 2
  62 #endif
  63 static unsigned int net_debug = NET_DEBUG;
  64 
  65 typedef unsigned char uchar;
  66 
  67 /* Information that need to be kept for each board. */
  68 struct net_local {
  69         struct enet_statistics stats;
  70         long open_time;                         /* Useless example local info. */
  71         uint tx_started:1;                      /* Number of packet on the Tx queue. */
  72         uchar tx_queue;                         /* Number of packet on the Tx queue. */
  73         ushort tx_queue_len;            /* Current length of the Tx queue. */
  74 };
  75 
  76 
  77 /* Offsets from the base address. */
  78 #define STATUS                  0
  79 #define TX_STATUS               0
  80 #define RX_STATUS               1
  81 #define TX_INTR                 2               /* Bit-mapped interrupt enable registers. */
  82 #define RX_INTR                 3
  83 #define TX_MODE                 4
  84 #define RX_MODE                 5
  85 #define CONFIG_0                6               /* Misc. configuration settings. */
  86 #define CONFIG_1                7
  87 /* Run-time register bank 2 definitions. */
  88 #define DATAPORT                8               /* Word-wide DMA or programmed-I/O dataport. */
  89 #define TX_START                10
  90 #define MODE13                  13
  91 #define EEPROM_Ctrl     16
  92 #define EEPROM_Data     17
  93 
  94 /*  EEPROM_Ctrl bits. */
  95 #define EE_SHIFT_CLK    0x40    /* EEPROM shift clock, in reg. 16. */
  96 #define EE_CS                   0x20    /* EEPROM chip select, in reg. 16. */
  97 #define EE_DATA_WRITE   0x80    /* EEPROM chip data in, in reg. 17. */
  98 #define EE_DATA_READ    0x80    /* EEPROM chip data out, in reg. 17. */
  99 
 100 /* Delay between EEPROM clock transitions. */
 101 #define eeprom_delay()  do { int _i = 40; while (--_i > 0) { __SLOW_DOWN_IO; }} while (0)
 102 
 103 /* The EEPROM commands include the alway-set leading bit. */
 104 #define EE_WRITE_CMD    (5 << 6)
 105 #define EE_READ_CMD             (6 << 6)
 106 #define EE_ERASE_CMD    (7 << 6)
 107 
 108 
 109 /* Index to functions, as function prototypes. */
 110 
 111 extern int at1700_probe(struct device *dev);
 112 
 113 static int at1700_probe1(struct device *dev, short ioaddr);
 114 static int read_eeprom(int ioaddr, int location);
 115 static int net_open(struct device *dev);
 116 static int      net_send_packet(struct sk_buff *skb, struct device *dev);
 117 static void net_interrupt(int reg_ptr);
 118 static void net_rx(struct device *dev);
 119 static int net_close(struct device *dev);
 120 static struct enet_statistics *net_get_stats(struct device *dev);
 121 #ifdef HAVE_MULTICAST
 122 static void set_multicast_list(struct device *dev, int num_addrs, void *addrs);
 123 #endif
 124 
 125 
 126 /* Check for a network adaptor of this type, and return '0' iff one exists.
 127    If dev->base_addr == 0, probe all likely locations.
 128    If dev->base_addr == 1, always return failure.
 129    If dev->base_addr == 2, alloate space for the device and return success
 130    (detachable devices only).
 131    */
 132 int
 133 at1700_probe(struct device *dev)
     /*  */
 134 {
 135         short ports[] = {0x300, 0x280, 0x380, 0x320, 0x340, 0x260, 0x2a0, 0x240, 0};
 136         short *port, base_addr = dev->base_addr;
 137 
 138         if (base_addr > 0x1ff)          /* Check a single specified location. */
 139                 return at1700_probe1(dev, base_addr);
 140         else if (base_addr > 0)         /* Don't probe at all. */
 141                 return ENXIO;
 142 
 143         for (port = &ports[0]; *port; port++) {
 144                 int ioaddr = *port;
 145 #ifdef HAVE_PORTRESERVE
 146                 if (check_region(ioaddr, 32))
 147                         continue;
 148 #endif
 149                 if (inw(ioaddr) != 0x0000)
 150                         continue;
 151                 if (at1700_probe1(dev, ioaddr) == 0)
 152                         return 0;
 153         }
 154 
 155         return ENODEV;                  /* ENODEV would be more accurate. */
 156 }
 157 
 158 int at1700_probe1(struct device *dev, short ioaddr)
     /*  */
 159 {
 160         unsigned short signature[4]         = {0x0000, 0xffff, 0x41f6, 0xefb6};
 161         unsigned short signature_invalid[4] = {0x0000, 0xffff, 0x00f0, 0x2f00};
 162         char irqmap[4] = {3, 4, 5, 9};
 163         unsigned short *station_address = (unsigned short *)dev->dev_addr;
 164         unsigned int i, irq;
 165 
 166         /* Resetting the chip doesn't reset the ISA interface, so don't bother.
 167            That means we have to be careful with the register values we probe for.
 168            */
 169         for (i = 0; i < 4; i++)
 170                 if ((inw(ioaddr + 2*i) | signature_invalid[i]) != signature[i]) {
 171                         if (net_debug > 1)
 172                                 printk("AT1700 signature match failed at %d (%04x vs. %04x)\n",
 173                                            i, inw(ioaddr + 2*i), signature[i]);
 174                         return -ENODEV;
 175                 }
 176 #ifdef HAVE_PORTRESERVE
 177         /* Grab the region so that we can find another board if the IRQ request
 178            fails. */
 179         snarf_region(ioaddr, 32);
 180 #endif
 181 
 182         irq = irqmap[ read_eeprom(ioaddr, 0) >> 14 ];
 183 
 184         /* Snarf the interrupt vector now. */
 185         if (request_irq(irq, &net_interrupt)) {
 186                 printk ("AT1700 found at %#3x, but it's unusable due to a conflict on"
 187                                 "IRQ %d.\n", ioaddr, irq);
 188                 return EAGAIN;
 189         }
 190 
 191         printk("%s: AT1700 found at %#3x, IRQ %d, address ", dev->name,
 192                    ioaddr, irq);
 193 
 194         dev->base_addr = ioaddr;
 195         dev->irq = irq;
 196         irq2dev_map[irq] = dev;
 197 
 198         for(i = 0; i < 3; i++) {
 199                 unsigned short eeprom_val = read_eeprom(ioaddr, 4+i);
 200                 printk("%04x", eeprom_val);
 201                 station_address[i] = ntohs(eeprom_val);
 202         }
 203 
 204         /* The EEPROM word 12 bit 0x0400 means use regular 100 ohm 10baseT signals,
 205            rather than 150 ohm shielded twisted pair compansation.
 206            0x0000 == auto-sense the interface
 207            0x0800 == use TP interface
 208            0x1800 == use coax interface
 209            */
 210         {
 211                 char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2"};
 212                 ushort setup_value = read_eeprom(ioaddr, 12);
 213 
 214                 dev->if_port = setup_value >> 8;
 215                 printk(" %s interface (%04x).\n", porttype[(dev->if_port>>3) & 3],
 216                            setup_value);
 217         }
 218 
 219         /* Set the station address in bank zero. */
 220         outb(0xe0, ioaddr + 7);
 221         for (i = 0; i < 6; i++)
 222                 outb(dev->dev_addr[i], ioaddr + 8 + i);
 223 
 224         /* Switch to bank 1 and set the multicast table to accept none. */
 225         outb(0xe4, ioaddr + 7);
 226         for (i = 0; i < 8; i++)
 227                 outb(0x00, ioaddr + 8 + i);
 228 
 229         /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
 230            bus access, two 4K Tx queues, and disabled Tx and Rx. */
 231         outb(0xda, ioaddr + CONFIG_0);
 232 
 233         /* Switch to bank 2 and lock our I/O address. */
 234         outb(0xe8, ioaddr + 7);
 235         outb(dev->if_port, MODE13);
 236 
 237         /* Power-down the chip.  Aren't we green! */
 238         outb(0x00, ioaddr + CONFIG_1);
 239 
 240         if (net_debug)
 241                 printk(version);
 242 
 243         /* Initialize the device structure. */
 244         dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
 245         memset(dev->priv, 0, sizeof(struct net_local));
 246 
 247         dev->open               = net_open;
 248         dev->stop               = net_close;
 249         dev->hard_start_xmit = net_send_packet;
 250         dev->get_stats  = net_get_stats;
 251 #ifdef HAVE_MULTICAST
 252         dev->set_multicast_list = &set_multicast_list;
 253 #endif
 254 
 255         /* Fill in the fields of the device structure with ethernet-generic values.
 256            This should be in a common file instead of per-driver.  */
 257         for (i = 0; i < DEV_NUMBUFFS; i++)
 258                 dev->buffs[i] = NULL;
 259 
 260         dev->hard_header        = eth_header;
 261         dev->add_arp            = eth_add_arp;
 262         dev->queue_xmit         = dev_queue_xmit;
 263         dev->rebuild_header     = eth_rebuild_header;
 264         dev->type_trans         = eth_type_trans;
 265 
 266         dev->type               = ARPHRD_ETHER;
 267         dev->hard_header_len = ETH_HLEN;
 268         dev->mtu                = 1500; /* eth_mtu */
 269         dev->addr_len   = ETH_ALEN;
 270         for (i = 0; i < ETH_ALEN; i++) {
 271                 dev->broadcast[i]=0xff;
 272         }
 273 
 274         /* New-style flags. */
 275         dev->flags              = IFF_BROADCAST;
 276         dev->family             = AF_INET;
 277         dev->pa_addr    = 0;
 278         dev->pa_brdaddr = 0;
 279         dev->pa_mask    = 0;
 280         dev->pa_alen    = sizeof(unsigned long);
 281 
 282         return 0;
 283 }
 284 
 285 static int read_eeprom(int ioaddr, int location)
     /*  */
 286 {
 287         int i;
 288         unsigned short retval = 0;
 289         short ee_addr = ioaddr + EEPROM_Ctrl;
 290         short ee_daddr = ioaddr + EEPROM_Data;
 291         int read_cmd = location | EE_READ_CMD;
 292         short ctrl_val = EE_CS;
 293         
 294         outb(ctrl_val, ee_addr);
 295         
 296         /* Shift the read command bits out. */
 297         for (i = 9; i >= 0; i--) {
 298                 short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
 299                 outb(dataval, ee_daddr);
 300                 outb(EE_CS | EE_SHIFT_CLK, ee_addr);    /* EEPROM clock tick. */
 301                 eeprom_delay();
 302                 outb(EE_CS, ee_addr);   /* Finish EEPROM a clock tick. */
 303                 eeprom_delay();
 304         }
 305         outb(EE_CS, ee_addr);
 306         
 307         for (i = 16; i > 0; i--) {
 308                 outb(EE_CS | EE_SHIFT_CLK, ee_addr);
 309                 eeprom_delay();
 310                 retval = (retval << 1) | ((inb(ee_daddr) & EE_DATA_READ) ? 1 : 0);
 311                 outb(EE_CS, ee_addr);
 312                 eeprom_delay();
 313         }
 314 
 315         /* Terminate the EEPROM access. */
 316         ctrl_val &= ~EE_CS;
 317         outb(ctrl_val | EE_SHIFT_CLK, ee_addr);
 318         eeprom_delay();
 319         outb(ctrl_val, ee_addr);
 320         eeprom_delay();
 321         return retval;
 322 }
 323 
 324 
 325 
 326 static int net_open(struct device *dev)
     /*  */
 327 {
 328         struct net_local *lp = (struct net_local *)dev->priv;
 329         int ioaddr = dev->base_addr;
 330         int i;
 331 
 332         /* Powerup the chip, initialize config register 1, and select bank 0. */
 333         outb(0xe0, ioaddr + CONFIG_1);
 334 
 335         /* Set the station address in bank zero. */
 336         for (i = 0; i < 6; i++)
 337                 outb(dev->dev_addr[i], ioaddr + 8 + i);
 338 
 339         /* Switch to bank 1 and set the multicast table to accept none. */
 340         outb(0xe4, ioaddr + 7);
 341         for (i = 0; i < 8; i++)
 342                 outb(0x00, ioaddr + 8 + i);
 343 
 344         /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
 345            bus access, and two 4K Tx queues. */
 346         outb(0xda, ioaddr + CONFIG_0);
 347 
 348         /* Same config 0, except enable the Rx and Tx. */
 349         outb(0x5a, ioaddr + CONFIG_0);
 350         /* Switch to register bank 2 for the run-time registers. */
 351         outb(0xe8, ioaddr + CONFIG_1);
 352 
 353         /* Turn on Rx interrupts, leave Tx interrupts off until packet Tx. */
 354         outb(0x00, ioaddr + TX_INTR);
 355         outb(0x81, ioaddr + RX_INTR);
 356 
 357         lp->open_time = jiffies;
 358 
 359         dev->tbusy = 0;
 360         dev->interrupt = 0;
 361         dev->start = 1;
 362 
 363         return 0;
 364 }
 365 
 366 static int
 367 net_send_packet(struct sk_buff *skb, struct device *dev)
     /*  */
 368 {
 369         struct net_local *lp = (struct net_local *)dev->priv;
 370         int ioaddr = dev->base_addr;
 371 
 372         if (dev->tbusy) {
 373                 /* If we get here, some higher level has decided we are broken.
 374                    There should really be a "kick me" function call instead. */
 375                 int tickssofar = jiffies - dev->trans_start;
 376                 if (tickssofar < 10)
 377                         return 1;
 378                 printk("%s: transmit timed out with status %04x, %s?\n", dev->name,
 379                            inw(ioaddr + STATUS), inb(ioaddr + TX_STATUS) & 0x80
 380                            ? "IRQ conflict" : "network cable problem");
 381                 printk("%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n",
 382                            dev->name, inw(ioaddr + 0), inw(ioaddr + 2), inw(ioaddr + 4),
 383                            inw(ioaddr + 6), inw(ioaddr + 8), inw(ioaddr + 10),
 384                            inw(ioaddr + 12), inw(ioaddr + 14));
 385                 lp->stats.tx_errors++;
 386                 /* ToDo: We should try to restart the adaptor... */
 387                 outw(0xffff, ioaddr + 24);
 388                 outw(0xffff, ioaddr + TX_STATUS);
 389                 outw(0xe85a, ioaddr + CONFIG_0);
 390                 outw(0x8100, ioaddr + TX_INTR);
 391                 dev->tbusy=0;
 392                 dev->trans_start = jiffies;
 393         }
 394 
 395         /* If some higher layer thinks we've missed an tx-done interrupt
 396            we are passed NULL. Caution: dev_tint() handles the cli()/sti()
 397            itself. */
 398         if (skb == NULL) {
 399                 dev_tint(dev);
 400                 return 0;
 401         }
 402 
 403         /* For ethernet, fill in the header.  This should really be done by a
 404            higher level, rather than duplicated for each ethernet adaptor. */
 405         if (!skb->arp  &&  dev->rebuild_header(skb+1, dev)) {
 406                 skb->dev = dev;
 407                 arp_queue (skb);
 408                 return 0;
 409         }
 410         skb->arp=1;
 411 
 412         /* Block a timer-based transmit from overlapping.  This could better be
 413            done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
 414         if (set_bit(0, (void*)&dev->tbusy) != 0)
 415                 printk("%s: Transmitter access conflict.\n", dev->name);
 416         else {
 417                 short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
 418                 unsigned char *buf = (void *)(skb+1);
 419 
 420                 if (net_debug > 4)
 421                         printk("%s: Transmitting a packet of length %d.\n", dev->name,
 422                                    skb->len);
 423 
 424                 /* Turn off the possible Tx interrupts. */
 425                 outb(0x00, ioaddr + TX_INTR);
 426                 
 427                 outw(length, ioaddr + DATAPORT);
 428                 outsw(ioaddr + DATAPORT, buf, (length + 1) >> 1);
 429 
 430                 lp->tx_queue++;
 431                 lp->tx_queue_len += length + 2;
 432 
 433                 if (lp->tx_started == 0) {
 434                         /* If the Tx is idle, always trigger a transmit. */
 435                         outb(0x80 | lp->tx_queue, ioaddr + TX_START);
 436                         lp->tx_queue = 0;
 437                         lp->tx_queue_len = 0;
 438                         dev->trans_start = jiffies;
 439                         lp->tx_started = 1;
 440                 } else if (lp->tx_queue_len < 4096 - 1502)      /* Room for one more packet? */
 441                         dev->tbusy = 0;
 442 
 443                 /* Turn on Tx interrupts back on. */
 444                 outb(0x82, ioaddr + TX_INTR);
 445         }
 446         if (skb->free)
 447                 kfree_skb (skb, FREE_WRITE);
 448 
 449         return 0;
 450 }
 451 
 452 /* The typical workload of the driver:
 453    Handle the network interface interrupts. */
 454 static void
 455 net_interrupt(int reg_ptr)
     /*  */
 456 {
 457         int irq = -(((struct pt_regs *)reg_ptr)->orig_eax+2);
 458         struct device *dev = (struct device *)(irq2dev_map[irq]);
 459         struct net_local *lp;
 460         int ioaddr, status;
 461 
 462         if (dev == NULL) {
 463                 printk ("at1700_interrupt(): irq %d for unknown device.\n", irq);
 464                 return;
 465         }
 466         dev->interrupt = 1;
 467 
 468         ioaddr = dev->base_addr;
 469         lp = (struct net_local *)dev->priv;
 470         status = inw(ioaddr + TX_STATUS);
 471         outw(status, ioaddr + TX_STATUS);
 472 
 473         if (net_debug > 4)
 474                 printk("%s: Interrupt with status %04x.\n", dev->name, status);
 475         if (status & 0xff00
 476                 ||  (inb(ioaddr + RX_MODE) & 0x40) == 0) {                      /* Got a packet(s). */
 477                 net_rx(dev);
 478         }
 479         if (status & 0x00ff) {
 480                 if (status & 0x80) {
 481                         lp->stats.tx_packets++;
 482                         if (lp->tx_queue) {
 483                                 outb(0x80 | lp->tx_queue, ioaddr + TX_START);
 484                                 lp->tx_queue = 0;
 485                                 lp->tx_queue_len = 0;
 486                                 dev->trans_start = jiffies;
 487                                 dev->tbusy = 0;
 488                                 mark_bh(INET_BH);       /* Inform upper layers. */
 489                         } else {
 490                                 lp->tx_started = 0;
 491                                 /* Turn on Tx interrupts off. */
 492                                 outb(0x00, ioaddr + TX_INTR);
 493                                 dev->tbusy = 0;
 494                         }
 495                 }
 496         }
 497 
 498         return;
 499 }
 500 
 501 /* We have a good packet(s), get it/them out of the buffers. */
 502 static void
 503 net_rx(struct device *dev)
     /*  */
 504 {
 505         struct net_local *lp = (struct net_local *)dev->priv;
 506         int ioaddr = dev->base_addr;
 507         int boguscount = 5;
 508 
 509         while ((inb(ioaddr + RX_MODE) & 0x40) == 0) {
 510                 ushort status = inw(ioaddr + DATAPORT);
 511 
 512                 if (net_debug > 4)
 513                         printk("%s: Rxing packet mode %02x status %04x.\n",
 514                                    dev->name, inb(ioaddr + RX_MODE), status);
 515 #ifndef final_version
 516                 if (status == 0) {
 517                         outb(0x05, ioaddr + 14);
 518                         break;
 519                 }
 520 #endif
 521 
 522                 if ((status & 0xF0) != 0x20) {  /* There was an error. */
 523                         lp->stats.rx_errors++;
 524                         if (status & 0x08) lp->stats.rx_length_errors++;
 525                         if (status & 0x04) lp->stats.rx_frame_errors++;
 526                         if (status & 0x02) lp->stats.rx_crc_errors++;
 527                         if (status & 0x01) lp->stats.rx_over_errors++;
 528                 } else {
 529                         ushort pkt_len = inw(ioaddr + DATAPORT);
 530                         /* Malloc up new buffer. */
 531                         int sksize = sizeof(struct sk_buff) + pkt_len;
 532                         struct sk_buff *skb;
 533 
 534                         if (pkt_len > 1550) {
 535                                 printk("%s: The AT1700 claimed a very large packet, size %d.\n",
 536                                            dev->name, pkt_len);
 537                                 outb(0x05, ioaddr + 14);
 538                                 lp->stats.rx_errors++;
 539                                 break;
 540                         }
 541                         skb = alloc_skb(sksize, GFP_ATOMIC);
 542                         if (skb == NULL) {
 543                                 printk("%s: Memory squeeze, dropping packet (len %d).\n",
 544                                            dev->name, pkt_len);
 545                                 outb(0x05, ioaddr + 14);
 546                                 lp->stats.rx_dropped++;
 547                                 break;
 548                         }
 549                         skb->mem_len = sksize;
 550                         skb->mem_addr = skb;
 551                         skb->len = pkt_len;
 552                         skb->dev = dev;
 553 
 554                         /* 'skb+1' points to the start of sk_buff data area. */
 555                         insw(ioaddr + DATAPORT, (void *)(skb+1), (pkt_len + 1) >> 1);
 556 
 557                         if (net_debug > 5) {
 558                                 int i;
 559                                 printk("%s: Rxed packet of length %d: ", dev->name, pkt_len);
 560                                 for (i = 0; i < 14; i++)
 561                                         printk(" %02x", ((unsigned char*)(skb + 1))[i]);
 562                                 printk(".\n");
 563                         }
 564 
 565 #ifdef HAVE_NETIF_RX
 566                         netif_rx(skb);
 567 #else
 568                         skb->lock = 0;
 569                         if (dev_rint((unsigned char*)skb, pkt_len, IN_SKBUFF, dev) != 0) {
 570                                 kfree_s(skb, sksize);
 571                                 lp->stats.rx_dropped++;
 572                                 break;
 573                         }
 574 #endif
 575                         lp->stats.rx_packets++;
 576                 }
 577                 if (--boguscount <= 0)
 578                         break;
 579         }
 580 
 581         /* If any worth-while packets have been received, dev_rint()
 582            has done a mark_bh(INET_BH) for us and will work on them
 583            when we get to the bottom-half routine. */
 584         {
 585                 int i;
 586                 for (i = 0; i < 20; i++) {
 587                         if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40)
 588                                 break;
 589                         outb(0x05, ioaddr + 14);
 590                 }
 591 
 592                 if (net_debug > 5)
 593                         printk("%s: Exint Rx packet with mode %02x after %d ticks.\n", 
 594                                    dev->name, inb(ioaddr + RX_MODE), i);
 595         }
 596         return;
 597 }
 598 
 599 /* The inverse routine to net_open(). */
 600 static int net_close(struct device *dev)
     /*  */
 601 {
 602         struct net_local *lp = (struct net_local *)dev->priv;
 603         int ioaddr = dev->base_addr;
 604 
 605         lp->open_time = 0;
 606 
 607         dev->tbusy = 1;
 608         dev->start = 0;
 609 
 610         /* Set configuration register 0 to disable Tx and Rx. */
 611         outb(0xda, ioaddr + CONFIG_0);
 612 
 613         /* Update the statistics -- ToDo. */
 614 
 615         /* Power-down the chip.  Green, green, green! */
 616         outb(0x00, ioaddr + CONFIG_1);
 617 
 618         return 0;
 619 }
 620 
 621 /* Get the current statistics.  This may be called with the card open or
 622    closed. */
 623 static struct enet_statistics *
 624 net_get_stats(struct device *dev)
     /*  */
 625 {
 626         struct net_local *lp = (struct net_local *)dev->priv;
 627 
 628         cli();
 629         /* ToDo: Update the statistics from the device registers. */
 630         sti();
 631 
 632         return &lp->stats;
 633 }
 634 
 635 #ifdef HAVE_MULTICAST
 636 /* Set or clear the multicast filter for this adaptor.
 637    num_addrs == -1      Promiscuous mode, receive all packets
 638    num_addrs == 0       Normal mode, clear multicast list
 639    num_addrs > 0        Multicast mode, receive normal and MC packets, and do
 640                         best-effort filtering.
 641  */
 642 static void
 643 set_multicast_list(struct device *dev, int num_addrs, void *addrs)
     /*  */
 644 {
 645         short ioaddr = dev->base_addr;
 646         if (num_addrs) {
 647                 outw(3, ioaddr + RX_MODE);      /* Enable promiscuous mode */
 648         } else
 649                 outw(2, ioaddr + RX_MODE);      /* Disable promiscuous, use normal mode */
 650 }
 651 #endif
 652 
 653 /*
 654  * Local variables:
 655  *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c at1700.c"
 656  *  version-control: t
 657  *  kept-new-versions: 5
 658  *  tab-width: 4
 659  * End:
 660  */
/* */
root/drivers/net/at1700.c

DEFINITIONS
