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
init_module
cleanup_module
   1 /* at1700.c: A network device driver for  the Allied Telesis AT1700.
   2 
   3         Written 1993-94 by Donald Becker.
   4 
   5         Copyright 1993 United States Government as represented by the
   6         Director, National Security Agency.
   7 
   8         This software may be used and distributed according to the terms
   9         of the GNU Public License, incorporated herein by reference.
  10 
  11         The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
  12         Center of Excellence in Space Data and Information Sciences
  13            Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
  14 
  15         This is a device driver for the Allied Telesis AT1700, which is a
  16         straight-forward Fujitsu MB86965 implementation.
  17 
  18   Sources:
  19     The Fujitsu MB86965 datasheet.
  20 
  21         After the initial version of this driver was written Gerry Sawkins of
  22         ATI provided their EEPROM configuration code header file.
  23     Thanks to NIIBE Yutaka <gniibe@mri.co.jp> for bug fixes.
  24 
  25   Bugs:
  26         The MB86965 has a design flaw that makes all probes unreliable.  Not
  27         only is it difficult to detect, it also moves around in I/O space in
  28         response to inb()s from other device probes!
  29 */
  30 
  31 static const char *version =
  32         "at1700.c:v1.12 1/18/95  Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  33 
  34 #include <linux/module.h>
  35 
  36 #include <linux/kernel.h>
  37 #include <linux/sched.h>
  38 #include <linux/types.h>
  39 #include <linux/fcntl.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/ptrace.h>
  42 #include <linux/ioport.h>
  43 #include <linux/in.h>
  44 #include <linux/malloc.h>
  45 #include <linux/string.h>
  46 #include <asm/system.h>
  47 #include <asm/bitops.h>
  48 #include <asm/io.h>
  49 #include <asm/dma.h>
  50 #include <linux/errno.h>
  51 
  52 #include <linux/netdevice.h>
  53 #include <linux/etherdevice.h>
  54 #include <linux/skbuff.h>
  55 
  56 /* This unusual address order is used to verify the CONFIG register. */
  57 static int at1700_probe_list[] =
  58 {0x260, 0x280, 0x2a0, 0x240, 0x340, 0x320, 0x380, 0x300, 0};
  59 
  60 /* use 0 for production, 1 for verification, >2 for debug */
  61 #ifndef NET_DEBUG
  62 #define NET_DEBUG 1
  63 #endif
  64 static unsigned int net_debug = NET_DEBUG;
  65 
  66 typedef unsigned char uchar;
  67 
  68 /* Information that need to be kept for each board. */
  69 struct net_local {
  70         struct enet_statistics stats;
  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 #define IOCONFIG                19
  94 #define RESET                   31              /* Write to reset some parts of the chip. */
  95 #define AT1700_IO_EXTENT        32
  96 
  97 /*  EEPROM_Ctrl bits. */
  98 #define EE_SHIFT_CLK    0x40    /* EEPROM shift clock, in reg. 16. */
  99 #define EE_CS                   0x20    /* EEPROM chip select, in reg. 16. */
 100 #define EE_DATA_WRITE   0x80    /* EEPROM chip data in, in reg. 17. */
 101 #define EE_DATA_READ    0x80    /* EEPROM chip data out, in reg. 17. */
 102 
 103 /* Delay between EEPROM clock transitions. */
 104 #define eeprom_delay()  do { int _i = 40; while (--_i > 0) { __SLOW_DOWN_IO; }} while (0)
 105 
 106 /* The EEPROM commands include the alway-set leading bit. */
 107 #define EE_WRITE_CMD    (5 << 6)
 108 #define EE_READ_CMD             (6 << 6)
 109 #define EE_ERASE_CMD    (7 << 6)
 110 
 111 
 112 /* Index to functions, as function prototypes. */
 113 
 114 extern int at1700_probe(struct device *dev);
 115 
 116 static int at1700_probe1(struct device *dev, short ioaddr);
 117 static int read_eeprom(int ioaddr, int location);
 118 static int net_open(struct device *dev);
 119 static int      net_send_packet(struct sk_buff *skb, struct device *dev);
 120 static void net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 121 static void net_rx(struct device *dev);
 122 static int net_close(struct device *dev);
 123 static struct enet_statistics *net_get_stats(struct device *dev);
 124 static void set_multicast_list(struct device *dev);
 125 
 126 
 127 /* Check for a network adaptor of this type, and return '0' iff one exists.
 128    If dev->base_addr == 0, probe all likely locations.
 129    If dev->base_addr == 1, always return failure.
 130    If dev->base_addr == 2, allocate space for the device and return success
 131    (detachable devices only).
 132    */
 133 #ifdef HAVE_DEVLIST
 134 /* Support for a alternate probe manager, which will eliminate the
 135    boilerplate below. */
 136 struct netdev_entry at1700_drv =
 137 {"at1700", at1700_probe1, AT1700_IO_EXTENT, at1700_probe_list};
 138 #else
 139 int
 140 at1700_probe(struct device *dev)
     /*  */
 141 {
 142         int i;
 143         int base_addr = dev ? dev->base_addr : 0;
 144 
 145         if (base_addr > 0x1ff)          /* Check a single specified location. */
 146                 return at1700_probe1(dev, base_addr);
 147         else if (base_addr != 0)        /* Don't probe at all. */
 148                 return ENXIO;
 149 
 150         for (i = 0; at1700_probe_list[i]; i++) {
 151                 int ioaddr = at1700_probe_list[i];
 152                 if (check_region(ioaddr, AT1700_IO_EXTENT))
 153                         continue;
 154                 if (at1700_probe1(dev, ioaddr) == 0)
 155                         return 0;
 156         }
 157 
 158         return ENODEV;
 159 }
 160 #endif
 161 
 162 /* The Fujitsu datasheet suggests that the NIC be probed for by checking its
 163    "signature", the default bit pattern after a reset.  This *doesn't* work --
 164    there is no way to reset the bus interface without a complete power-cycle!
 165 
 166    It turns out that ATI came to the same conclusion I did: the only thing
 167    that can be done is checking a few bits and then diving right into an
 168    EEPROM read. */
 169 
 170 int at1700_probe1(struct device *dev, short ioaddr)
     /*  */
 171 {
 172         char irqmap[8] = {3, 4, 5, 9, 10, 11, 14, 15};
 173         unsigned int i, irq;
 174 
 175         /* Resetting the chip doesn't reset the ISA interface, so don't bother.
 176            That means we have to be careful with the register values we probe for.
 177            */
 178 #ifdef notdef
 179         printk("at1700 probe at %#x, eeprom is %4.4x %4.4x %4.4x ctrl %4.4x.\n",
 180                    ioaddr, read_eeprom(ioaddr, 4), read_eeprom(ioaddr, 5),
 181                    read_eeprom(ioaddr, 6), inw(ioaddr + EEPROM_Ctrl));
 182 #endif
 183         if (at1700_probe_list[inb(ioaddr + IOCONFIG) & 0x07] != ioaddr
 184                 || read_eeprom(ioaddr, 4) != 0x0000
 185                 || (read_eeprom(ioaddr, 5) & 0xff00) != 0xF400)
 186                 return -ENODEV;
 187 
 188         /* Reset the internal state machines. */
 189         outb(0, ioaddr + RESET);
 190 
 191         irq = irqmap[(read_eeprom(ioaddr, 12)&0x04)
 192                                  | (read_eeprom(ioaddr, 0)>>14)];
 193 
 194         /* Snarf the interrupt vector now. */
 195         if (request_irq(irq, &net_interrupt, 0, "at1700", NULL)) {
 196                 printk ("AT1700 found at %#3x, but it's unusable due to a conflict on"
 197                                 "IRQ %d.\n", ioaddr, irq);
 198                 return EAGAIN;
 199         }
 200 
 201         /* Allocate a new 'dev' if needed. */
 202         if (dev == NULL)
 203                 dev = init_etherdev(0, sizeof(struct net_local));
 204 
 205         /* Grab the region so that we can find another board if the IRQ request
 206            fails. */
 207         request_region(ioaddr, AT1700_IO_EXTENT, "at1700");
 208 
 209         printk("%s: AT1700 found at %#3x, IRQ %d, address ", dev->name,
 210                    ioaddr, irq);
 211 
 212         dev->base_addr = ioaddr;
 213         dev->irq = irq;
 214         irq2dev_map[irq] = dev;
 215 
 216         for(i = 0; i < 3; i++) {
 217                 unsigned short eeprom_val = read_eeprom(ioaddr, 4+i);
 218                 printk("%04x", eeprom_val);
 219                 ((unsigned short *)dev->dev_addr)[i] = ntohs(eeprom_val);
 220         }
 221 
 222         /* The EEPROM word 12 bit 0x0400 means use regular 100 ohm 10baseT signals,
 223            rather than 150 ohm shielded twisted pair compensation.
 224            0x0000 == auto-sense the interface
 225            0x0800 == use TP interface
 226            0x1800 == use coax interface
 227            */
 228         {
 229                 const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2"};
 230                 ushort setup_value = read_eeprom(ioaddr, 12);
 231 
 232                 dev->if_port = setup_value >> 8;
 233                 printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]);
 234         }
 235 
 236         /* Set the station address in bank zero. */
 237         outb(0xe0, ioaddr + 7);
 238         for (i = 0; i < 6; i++)
 239                 outb(dev->dev_addr[i], ioaddr + 8 + i);
 240 
 241         /* Switch to bank 1 and set the multicast table to accept none. */
 242         outb(0xe4, ioaddr + 7);
 243         for (i = 0; i < 8; i++)
 244                 outb(0x00, ioaddr + 8 + i);
 245 
 246         /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
 247            bus access, two 4K Tx queues, and disabled Tx and Rx. */
 248         outb(0xda, ioaddr + CONFIG_0);
 249 
 250         /* Switch to bank 2 and lock our I/O address. */
 251         outb(0xe8, ioaddr + 7);
 252         outb(dev->if_port, MODE13);
 253 
 254         /* Power-down the chip.  Aren't we green! */
 255         outb(0x00, ioaddr + CONFIG_1);
 256 
 257         if (net_debug)
 258                 printk(version);
 259 
 260         /* Initialize the device structure. */
 261         dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
 262         if (dev->priv == NULL)
 263                 return -ENOMEM;
 264         memset(dev->priv, 0, sizeof(struct net_local));
 265 
 266         dev->open               = net_open;
 267         dev->stop               = net_close;
 268         dev->hard_start_xmit = net_send_packet;
 269         dev->get_stats  = net_get_stats;
 270         dev->set_multicast_list = &set_multicast_list;
 271 
 272         /* Fill in the fields of 'dev' with ethernet-generic values. */
 273            
 274         ether_setup(dev);
 275         return 0;
 276 }
 277 
 278 static int read_eeprom(int ioaddr, int location)
     /*  */
 279 {
 280         int i;
 281         unsigned short retval = 0;
 282         short ee_addr = ioaddr + EEPROM_Ctrl;
 283         short ee_daddr = ioaddr + EEPROM_Data;
 284         int read_cmd = location | EE_READ_CMD;
 285         short ctrl_val = EE_CS;
 286         
 287         outb(ctrl_val, ee_addr);
 288         
 289         /* Shift the read command bits out. */
 290         for (i = 9; i >= 0; i--) {
 291                 short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
 292                 outb(dataval, ee_daddr);
 293                 outb(EE_CS | EE_SHIFT_CLK, ee_addr);    /* EEPROM clock tick. */
 294                 eeprom_delay();
 295                 outb(EE_CS, ee_addr);   /* Finish EEPROM a clock tick. */
 296                 eeprom_delay();
 297         }
 298         outb(EE_CS, ee_addr);
 299         
 300         for (i = 16; i > 0; i--) {
 301                 outb(EE_CS | EE_SHIFT_CLK, ee_addr);
 302                 eeprom_delay();
 303                 retval = (retval << 1) | ((inb(ee_daddr) & EE_DATA_READ) ? 1 : 0);
 304                 outb(EE_CS, ee_addr);
 305                 eeprom_delay();
 306         }
 307 
 308         /* Terminate the EEPROM access. */
 309         ctrl_val &= ~EE_CS;
 310         outb(ctrl_val | EE_SHIFT_CLK, ee_addr);
 311         eeprom_delay();
 312         outb(ctrl_val, ee_addr);
 313         eeprom_delay();
 314         return retval;
 315 }
 316 
 317 
 318 
 319 static int net_open(struct device *dev)
     /*  */
 320 {
 321         struct net_local *lp = (struct net_local *)dev->priv;
 322         int ioaddr = dev->base_addr;
 323         int i;
 324 
 325         /* Powerup the chip, initialize config register 1, and select bank 0. */
 326         outb(0xe0, ioaddr + CONFIG_1);
 327 
 328         /* Set the station address in bank zero. */
 329         for (i = 0; i < 6; i++)
 330                 outb(dev->dev_addr[i], ioaddr + 8 + i);
 331 
 332         /* Switch to bank 1 and set the multicast table to accept none. */
 333         outb(0xe4, ioaddr + 7);
 334         for (i = 0; i < 8; i++)
 335                 outb(0x00, ioaddr + 8 + i);
 336 
 337         /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
 338            bus access, and two 4K Tx queues. */
 339         outb(0xda, ioaddr + CONFIG_0);
 340 
 341         /* Same config 0, except enable the Rx and Tx. */
 342         outb(0x5a, ioaddr + CONFIG_0);
 343         /* Switch to register bank 2 for the run-time registers. */
 344         outb(0xe8, ioaddr + CONFIG_1);
 345 
 346         lp->tx_started = 0;
 347         lp->tx_queue = 0;
 348         lp->tx_queue_len = 0;
 349 
 350         /* Turn on Rx interrupts, leave Tx interrupts off until packet Tx. */
 351         outb(0x00, ioaddr + TX_INTR);
 352         outb(0x81, ioaddr + RX_INTR);
 353 
 354         dev->tbusy = 0;
 355         dev->interrupt = 0;
 356         dev->start = 1;
 357 
 358         MOD_INC_USE_COUNT;
 359 
 360         return 0;
 361 }
 362 
 363 static int
 364 net_send_packet(struct sk_buff *skb, struct device *dev)
     /*  */
 365 {
 366         struct net_local *lp = (struct net_local *)dev->priv;
 367         int ioaddr = dev->base_addr;
 368 
 369         if (dev->tbusy) {
 370                 /* If we get here, some higher level has decided we are broken.
 371                    There should really be a "kick me" function call instead. */
 372                 int tickssofar = jiffies - dev->trans_start;
 373                 if (tickssofar < 10)
 374                         return 1;
 375                 printk("%s: transmit timed out with status %04x, %s?\n", dev->name,
 376                            inw(ioaddr + STATUS), inb(ioaddr + TX_STATUS) & 0x80
 377                            ? "IRQ conflict" : "network cable problem");
 378                 printk("%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n",
 379                            dev->name, inw(ioaddr + 0), inw(ioaddr + 2), inw(ioaddr + 4),
 380                            inw(ioaddr + 6), inw(ioaddr + 8), inw(ioaddr + 10),
 381                            inw(ioaddr + 12), inw(ioaddr + 14));
 382                 lp->stats.tx_errors++;
 383                 /* ToDo: We should try to restart the adaptor... */
 384                 outw(0xffff, ioaddr + 24);
 385                 outw(0xffff, ioaddr + TX_STATUS);
 386                 outw(0xe85a, ioaddr + CONFIG_0);
 387                 outw(0x8100, ioaddr + TX_INTR);
 388                 dev->tbusy=0;
 389                 dev->trans_start = jiffies;
 390                 lp->tx_started = 0;
 391                 lp->tx_queue = 0;
 392                 lp->tx_queue_len = 0;
 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         /* Block a timer-based transmit from overlapping.  This could better be
 404            done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
 405         if (set_bit(0, (void*)&dev->tbusy) != 0)
 406                 printk("%s: Transmitter access conflict.\n", dev->name);
 407         else {
 408                 short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
 409                 unsigned char *buf = skb->data;
 410 
 411                 /* Turn off the possible Tx interrupts. */
 412                 outb(0x00, ioaddr + TX_INTR);
 413                 
 414                 outw(length, ioaddr + DATAPORT);
 415                 outsw(ioaddr + DATAPORT, buf, (length + 1) >> 1);
 416 
 417                 lp->tx_queue++;
 418                 lp->tx_queue_len += length + 2;
 419 
 420                 if (lp->tx_started == 0) {
 421                         /* If the Tx is idle, always trigger a transmit. */
 422                         outb(0x80 | lp->tx_queue, ioaddr + TX_START);
 423                         lp->tx_queue = 0;
 424                         lp->tx_queue_len = 0;
 425                         dev->trans_start = jiffies;
 426                         lp->tx_started = 1;
 427                         dev->tbusy = 0;
 428                 } else if (lp->tx_queue_len < 4096 - 1502)
 429                         /* Yes, there is room for one more packet. */
 430                         dev->tbusy = 0;
 431 
 432                 /* Turn on Tx interrupts back on. */
 433                 outb(0x82, ioaddr + TX_INTR);
 434         }
 435         dev_kfree_skb (skb, FREE_WRITE);
 436 
 437         return 0;
 438 }
 439 
 440 /* The typical workload of the driver:
 441    Handle the network interface interrupts. */
 442 static void
 443 net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
     /*  */
 444 {
 445         struct device *dev = (struct device *)(irq2dev_map[irq]);
 446         struct net_local *lp;
 447         int ioaddr, status;
 448 
 449         if (dev == NULL) {
 450                 printk ("at1700_interrupt(): irq %d for unknown device.\n", irq);
 451                 return;
 452         }
 453         dev->interrupt = 1;
 454 
 455         ioaddr = dev->base_addr;
 456         lp = (struct net_local *)dev->priv;
 457         status = inw(ioaddr + TX_STATUS);
 458         outw(status, ioaddr + TX_STATUS);
 459 
 460         if (net_debug > 4)
 461                 printk("%s: Interrupt with status %04x.\n", dev->name, status);
 462         if (status & 0xff00
 463                 ||  (inb(ioaddr + RX_MODE) & 0x40) == 0) {                      /* Got a packet(s). */
 464                 net_rx(dev);
 465         }
 466         if (status & 0x00ff) {
 467                 if (status & 0x80) {
 468                         lp->stats.tx_packets++;
 469                         if (lp->tx_queue) {
 470                                 outb(0x80 | lp->tx_queue, ioaddr + TX_START);
 471                                 lp->tx_queue = 0;
 472                                 lp->tx_queue_len = 0;
 473                                 dev->trans_start = jiffies;
 474                                 dev->tbusy = 0;
 475                                 mark_bh(NET_BH);        /* Inform upper layers. */
 476                         } else {
 477                                 lp->tx_started = 0;
 478                                 /* Turn on Tx interrupts off. */
 479                                 outb(0x00, ioaddr + TX_INTR);
 480                                 dev->tbusy = 0;
 481                                 mark_bh(NET_BH);        /* Inform upper layers. */
 482                         }
 483                 }
 484         }
 485 
 486         dev->interrupt = 0;
 487         return;
 488 }
 489 
 490 /* We have a good packet(s), get it/them out of the buffers. */
 491 static void
 492 net_rx(struct device *dev)
     /*  */
 493 {
 494         struct net_local *lp = (struct net_local *)dev->priv;
 495         int ioaddr = dev->base_addr;
 496         int boguscount = 5;
 497 
 498         while ((inb(ioaddr + RX_MODE) & 0x40) == 0) {
 499                 ushort status = inw(ioaddr + DATAPORT);
 500                 ushort pkt_len = inw(ioaddr + DATAPORT);
 501 
 502                 if (net_debug > 4)
 503                         printk("%s: Rxing packet mode %02x status %04x.\n",
 504                                    dev->name, inb(ioaddr + RX_MODE), status);
 505 #ifndef final_version
 506                 if (status == 0) {
 507                         outb(0x05, ioaddr + 14);
 508                         break;
 509                 }
 510 #endif
 511 
 512                 if ((status & 0xF0) != 0x20) {  /* There was an error. */
 513                         lp->stats.rx_errors++;
 514                         if (status & 0x08) lp->stats.rx_length_errors++;
 515                         if (status & 0x04) lp->stats.rx_frame_errors++;
 516                         if (status & 0x02) lp->stats.rx_crc_errors++;
 517                         if (status & 0x01) lp->stats.rx_over_errors++;
 518                 } else {
 519                         /* Malloc up new buffer. */
 520                         struct sk_buff *skb;
 521 
 522                         if (pkt_len > 1550) {
 523                                 printk("%s: The AT1700 claimed a very large packet, size %d.\n",
 524                                            dev->name, pkt_len);
 525                                 /* Prime the FIFO and then flush the packet. */
 526                                 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
 527                                 outb(0x05, ioaddr + 14);
 528                                 lp->stats.rx_errors++;
 529                                 break;
 530                         }
 531                         skb = dev_alloc_skb(pkt_len+3);
 532                         if (skb == NULL) {
 533                                 printk("%s: Memory squeeze, dropping packet (len %d).\n",
 534                                            dev->name, pkt_len);
 535                                 /* Prime the FIFO and then flush the packet. */
 536                                 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
 537                                 outb(0x05, ioaddr + 14);
 538                                 lp->stats.rx_dropped++;
 539                                 break;
 540                         }
 541                         skb->dev = dev;
 542                         skb_reserve(skb,2);
 543 
 544                         insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1);
 545                         skb->protocol=eth_type_trans(skb, dev);
 546                         netif_rx(skb);
 547                         lp->stats.rx_packets++;
 548                 }
 549                 if (--boguscount <= 0)
 550                         break;
 551         }
 552 
 553         /* If any worth-while packets have been received, dev_rint()
 554            has done a mark_bh(NET_BH) for us and will work on them
 555            when we get to the bottom-half routine. */
 556         {
 557                 int i;
 558                 for (i = 0; i < 20; i++) {
 559                         if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40)
 560                                 break;
 561                         inw(ioaddr + DATAPORT);                         /* dummy status read */
 562                         outb(0x05, ioaddr + 14);
 563                 }
 564 
 565                 if (net_debug > 5)
 566                         printk("%s: Exint Rx packet with mode %02x after %d ticks.\n", 
 567                                    dev->name, inb(ioaddr + RX_MODE), i);
 568         }
 569         return;
 570 }
 571 
 572 /* The inverse routine to net_open(). */
 573 static int net_close(struct device *dev)
     /*  */
 574 {
 575         int ioaddr = dev->base_addr;
 576 
 577         dev->tbusy = 1;
 578         dev->start = 0;
 579 
 580         /* Set configuration register 0 to disable Tx and Rx. */
 581         outb(0xda, ioaddr + CONFIG_0);
 582 
 583         /* Update the statistics -- ToDo. */
 584 
 585         /* Power-down the chip.  Green, green, green! */
 586         outb(0x00, ioaddr + CONFIG_1);
 587 
 588         MOD_DEC_USE_COUNT;
 589 
 590         return 0;
 591 }
 592 
 593 /* Get the current statistics.  This may be called with the card open or
 594    closed. */
 595 static struct enet_statistics *
 596 net_get_stats(struct device *dev)
     /*  */
 597 {
 598         struct net_local *lp = (struct net_local *)dev->priv;
 599 
 600         cli();
 601         /* ToDo: Update the statistics from the device registers. */
 602         sti();
 603 
 604         return &lp->stats;
 605 }
 606 
 607 /* Set or clear the multicast filter for this adaptor.
 608    num_addrs == -1      Promiscuous mode, receive all packets
 609    num_addrs == 0       Normal mode, clear multicast list
 610    num_addrs > 0        Multicast mode, receive normal and MC packets, and do
 611                         best-effort filtering.
 612  */
 613 static void
 614 set_multicast_list(struct device *dev)
     /*  */
 615 {
 616         short ioaddr = dev->base_addr;
 617         if (dev->mc_count || dev->flags&(IFF_PROMISC|IFF_ALLMULTI)) 
 618         {
 619                 /*
 620                  *      We must make the kernel realise we had to move
 621                  *      into promisc mode or we start all out war on
 622                  *      the cable. - AC
 623                  */
 624                 dev->flags|=IFF_PROMISC;                
 625         
 626                 outb(3, ioaddr + RX_MODE);      /* Enable promiscuous mode */
 627         } 
 628         else
 629                 outb(2, ioaddr + RX_MODE);      /* Disable promiscuous, use normal mode */
 630 }
 631 #ifdef MODULE
 632 static char devicename[9] = { 0, };
 633 static struct device dev_at1700 = {
 634         devicename, /* device name is inserted by linux/drivers/net/net_init.c */
 635         0, 0, 0, 0,
 636         0, 0,
 637         0, 0, 0, NULL, at1700_probe };
 638 
 639 static int io = 0x260;
 640 static int irq = 0;
 641 
 642 int init_module(void)
     /*  */
 643 {
 644         if (io == 0)
 645                 printk("at1700: You should not use auto-probing with insmod!\n");
 646         dev_at1700.base_addr = io;
 647         dev_at1700.irq       = irq;
 648         if (register_netdev(&dev_at1700) != 0) {
 649                 printk("at1700: register_netdev() returned non-zero.\n");
 650                 return -EIO;
 651         }
 652         return 0;
 653 }
 654 
 655 void
 656 cleanup_module(void)
     /*  */
 657 {
 658         unregister_netdev(&dev_at1700);
 659         kfree(dev_at1700.priv);
 660         dev_at1700.priv = NULL;
 661 
 662         /* If we don't do this, we can't re-insmod it later. */
 663         free_irq(dev_at1700.irq, NULL);
 664         irq2dev_map[dev_at1700.irq] = NULL;
 665         release_region(dev_at1700.base_addr, AT1700_IO_EXTENT);
 666 }
 667 #endif /* MODULE */
 668 
 669 /*
 670  * Local variables:
 671  *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c at1700.c"
 672  *  version-control: t
 673  *  kept-new-versions: 5
 674  *  tab-width: 4
 675  *  c-indent-level: 4
 676  * End:
 677  */
/* */
root/drivers/net/at1700.c

DEFINITIONS
