drivers/net/smc-ultra.c

/* */
This source file includes following definitions.
ultra_probe
ultra_probe1
ultra_open
ultra_reset_8390
ultra_block_input
ultra_block_output
ultra_close_card
init_module
cleanup_module
   1 /* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
   2 /*
   3         Written 1993,1994,1995 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 driver for the SMC Ultra and SMC EtherEZ ethercards.
  16 
  17         This driver uses the cards in the 8390-compatible, shared memory mode.
  18         Most of the run-time complexity is handled by the generic code in
  19         8390.c.  The code in this file is responsible for
  20 
  21                 ultra_probe()           Detecting and initializing the card.
  22                 ultra_probe1()  
  23 
  24                 ultra_open()            The card-specific details of starting, stopping
  25                 ultra_reset_8390()      and resetting the 8390 NIC core.
  26                 ultra_close()
  27 
  28                 ultra_block_input()             Routines for reading and writing blocks of
  29                 ultra_block_output()    packet buffer memory.
  30 
  31         This driver enables the shared memory only when doing the actual data
  32         transfers to avoid a bug in early version of the card that corrupted
  33         data transferred by a AHA1542.
  34 
  35         This driver does not support the programmed-I/O data transfer mode of
  36         the EtherEZ.  That support (if available) is smc-ez.c.  Nor does it
  37         use the non-8390-compatible "Altego" mode. (No support currently planned.)
  38 */
  39 
  40 static const char *version =
  41         "smc-ultra.c:v1.12 1/18/95 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  42 
  43 
  44 #ifdef MODULE
  45 #include <linux/module.h>
  46 #include <linux/version.h>
  47 #endif
  48 
  49 #include <linux/kernel.h>
  50 #include <linux/sched.h>
  51 #include <linux/errno.h>
  52 #include <linux/string.h>
  53 #include <asm/io.h>
  54 #include <asm/system.h>
  55 
  56 #include <linux/netdevice.h>
  57 #include <linux/etherdevice.h>
  58 #include "8390.h"
  59 
  60 /* A zero-terminated list of I/O addresses to be probed. */
  61 static unsigned int ultra_portlist[] =
  62 {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
  63 
  64 int ultra_probe(struct device *dev);
  65 int ultra_probe1(struct device *dev, int ioaddr);
  66 
  67 static int ultra_open(struct device *dev);
  68 static void ultra_reset_8390(struct device *dev);
  69 static int ultra_block_input(struct device *dev, int count,
  70                                                   char *buf, int ring_offset);
  71 static void ultra_block_output(struct device *dev, int count,
  72                                                         const unsigned char *buf, const start_page);
  73 static int ultra_close_card(struct device *dev);
  74 
  75 
  76 #define START_PG                0x00    /* First page of TX buffer */
  77 
  78 #define ULTRA_CMDREG    0               /* Offset to ASIC command register. */
  79 #define  ULTRA_RESET    0x80    /* Board reset, in ULTRA_CMDREG. */
  80 #define  ULTRA_MEMENB   0x40    /* Enable the shared memory. */
  81 #define ULTRA_NIC_OFFSET  16    /* NIC register offset from the base_addr. */
  82 #define ULTRA_IO_EXTENT 32
  83 
  84 /*      Probe for the Ultra.  This looks like a 8013 with the station
  85         address PROM at I/O ports <base>+8 to <base>+13, with a checksum
  86         following.
  87 */
  88 #ifdef HAVE_DEVLIST
  89 struct netdev_entry ultra_drv =
  90 {"ultra", ultra_probe1, NETCARD_IO_EXTENT, netcard_portlist};
  91 #else
  92 
  93 int ultra_probe(struct device *dev)
     /*  */
  94 {
  95         int i;
  96         int base_addr = dev ? dev->base_addr : 0;
  97 
  98         if (base_addr > 0x1ff)          /* Check a single specified location. */
  99                 return ultra_probe1(dev, base_addr);
 100         else if (base_addr != 0)        /* Don't probe at all. */
 101                 return ENXIO;
 102 
 103         for (i = 0; ultra_portlist[i]; i++) {
 104                 int ioaddr = ultra_portlist[i];
 105                 if (check_region(ioaddr, ULTRA_IO_EXTENT))
 106                         continue;
 107                 if (ultra_probe1(dev, ioaddr) == 0)
 108                         return 0;
 109         }
 110 
 111         return ENODEV;
 112 }
 113 #endif
 114 
 115 int ultra_probe1(struct device *dev, int ioaddr)
     /*  */
 116 {
 117         int i;
 118         int checksum = 0;
 119         const char *model_name;
 120         unsigned char eeprom_irq = 0;
 121         /* Values from various config regs. */
 122         unsigned char num_pages, irqreg, addr;
 123         unsigned char idreg = inb(ioaddr + 7);
 124         unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
 125 
 126         /* Check the ID nibble. */
 127         if ((idreg & 0xF0) != 0x20                      /* SMC Ultra */
 128                 && (idreg & 0xF0) != 0x40)              /* SMC EtherEZ */
 129                 return ENODEV;
 130 
 131         /* Select the station address register set. */
 132         outb(reg4, ioaddr + 4);
 133 
 134         for (i = 0; i < 8; i++)
 135                 checksum += inb(ioaddr + 8 + i);
 136         if ((checksum & 0xff) != 0xFF)
 137                 return ENODEV;
 138 
 139         if (dev == NULL)
 140                 dev = init_etherdev(0, sizeof(struct ei_device), 0);
 141         if (dev == NULL) /* Still.. */
 142                 return ENOMEM; /* Out of memory ?? */
 143 
 144         model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
 145 
 146         printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);
 147 
 148         for (i = 0; i < 6; i++)
 149                 printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
 150 
 151         /* Switch from the station address to the alternate register set and
 152            read the useful registers there. */
 153         outb(0x80 | reg4, ioaddr + 4);
 154 
 155         /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
 156         outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
 157         irqreg = inb(ioaddr + 0xd);
 158         addr = inb(ioaddr + 0xb);
 159 
 160         /* Switch back to the station address register set so that the MS-DOS driver
 161            can find the card after a warm boot. */
 162         outb(reg4, ioaddr + 4);
 163 
 164         if (dev->irq < 2) {
 165                 unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
 166                 int irq;
 167 
 168                 /* The IRQ bits are split. */
 169                 irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
 170 
 171                 if (irq == 0) {
 172                         printk(", failed to detect IRQ line.\n");
 173                         return -EAGAIN;
 174                 }
 175                 dev->irq = irq;
 176                 eeprom_irq = 1;
 177         }
 178 
 179 
 180         /* OK, we are certain this is going to work.  Setup the device. */
 181         request_region(ioaddr, ULTRA_IO_EXTENT, model_name);
 182 
 183         /* The 8390 isn't at the base address, so fake the offset */
 184         dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
 185 
 186         {
 187                 int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
 188                 short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
 189 
 190                 dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
 191                 num_pages = num_pages_tbl[(addr >> 4) & 3];
 192         }
 193 
 194         ethdev_init(dev);
 195 
 196         ei_status.name = model_name;
 197         ei_status.word16 = 1;
 198         ei_status.tx_start_page = START_PG;
 199         ei_status.rx_start_page = START_PG + TX_PAGES;
 200         ei_status.stop_page = num_pages;
 201 
 202         dev->rmem_start = dev->mem_start + TX_PAGES*256;
 203         dev->mem_end = dev->rmem_end
 204                 = dev->mem_start + (ei_status.stop_page - START_PG)*256;
 205 
 206         printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
 207                    dev->irq, dev->mem_start, dev->mem_end-1);
 208         if (ei_debug > 0)
 209                 printk(version);
 210 
 211         ei_status.reset_8390 = &ultra_reset_8390;
 212         ei_status.block_input = &ultra_block_input;
 213         ei_status.block_output = &ultra_block_output;
 214         dev->open = &ultra_open;
 215         dev->stop = &ultra_close_card;
 216         NS8390_init(dev, 0);
 217 
 218         return 0;
 219 }
 220 
 221 static int
 222 ultra_open(struct device *dev)
     /*  */
 223 {
 224         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 225         int rc;
 226 
 227         if (request_irq(dev->irq, ei_interrupt, 0, ei_status.name))
 228                 return -EAGAIN;
 229 
 230         outb(ULTRA_MEMENB, ioaddr);     /* Enable memory, 16 bit mode. */
 231         outb(0x80, ioaddr + 5);
 232         outb(0x01, ioaddr + 6);         /* Enable interrupts and memory. */
 233         rc = ei_open(dev);
 234         if (rc != 0) return rc;
 235 #ifdef MODULE
 236         MOD_INC_USE_COUNT;
 237 #endif
 238         return 0;
 239 }
 240 
 241 static void
 242 ultra_reset_8390(struct device *dev)
     /*  */
 243 {
 244         int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
 245 
 246         outb(ULTRA_RESET, cmd_port);
 247         if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
 248         ei_status.txing = 0;
 249 
 250         outb(ULTRA_MEMENB, cmd_port);
 251 
 252         if (ei_debug > 1) printk("reset done\n");
 253         return;
 254 }
 255 
 256 /* Block input and output are easy on shared memory ethercards, the only
 257    complication is when the ring buffer wraps. */
 258 
 259 static int
 260 ultra_block_input(struct device *dev, int count, char *buf, int ring_offset)
     /*  */
 261 {
 262         void *xfer_start = (void *)(dev->mem_start + ring_offset
 263                                                                 - (START_PG<<8));
 264 
 265         /* Enable shared memory. */
 266         outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
 267 
 268         if (xfer_start + count > (void*) dev->rmem_end) {
 269                 /* We must wrap the input move. */
 270                 int semi_count = (void*)dev->rmem_end - xfer_start;
 271                 memcpy(buf, xfer_start, semi_count);
 272                 count -= semi_count;
 273                 memcpy(buf + semi_count, (char *)dev->rmem_start, count);
 274                 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
 275                 return dev->rmem_start + count;
 276         }
 277         memcpy(buf, xfer_start, count);
 278 
 279         outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
 280         return ring_offset + count;
 281 }
 282 
 283 static void
 284 ultra_block_output(struct device *dev, int count, const unsigned char *buf,
     /*  */
 285                                 int start_page)
 286 {
 287         unsigned char *shmem
 288                 = (unsigned char *)dev->mem_start + ((start_page - START_PG)<<8);
 289 
 290         /* Enable shared memory. */
 291         outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
 292 
 293         memcpy(shmem, buf, count);
 294 
 295         outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
 296 }
 297 
 298 static int
 299 ultra_close_card(struct device *dev)
     /*  */
 300 {
 301         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
 302 
 303         dev->start = 0;
 304         dev->tbusy = 1;
 305 
 306         if (ei_debug > 1)
 307                 printk("%s: Shutting down ethercard.\n", dev->name);
 308 
 309         outb(0x00, ioaddr + 6);         /* Disable interrupts. */
 310         free_irq(dev->irq);
 311         irq2dev_map[dev->irq] = 0;
 312 
 313         NS8390_init(dev, 0);
 314 
 315         /* We should someday disable shared memory and change to 8-bit mode
 316            "just in case"... */
 317 
 318 #ifdef MODULE
 319         MOD_DEC_USE_COUNT;
 320 #endif
 321 
 322         return 0;
 323 }
 324 
 325 #ifdef MODULE
 326 char kernel_version[] = UTS_RELEASE;
 327 static char devicename[9] = { 0, };
 328 static struct device dev_ultra = {
 329         devicename, /* device name is inserted by linux/drivers/net/net_init.c */
 330         0, 0, 0, 0,
 331         0, 0,
 332         0, 0, 0, NULL, ultra_probe };
 333 
 334 int io = 0x200;
 335 int irq = 0;
 336 
 337 int init_module(void)
     /*  */
 338 {
 339         if (io == 0)
 340                 printk("smc-ultra: You should not use auto-probing with insmod!\n");
 341         dev_ultra.base_addr = io;
 342         dev_ultra.irq       = irq;
 343         if (register_netdev(&dev_ultra) != 0) {
 344                 printk("smc-ultra: register_netdev() returned non-zero.\n");
 345                 return -EIO;
 346         }
 347         return 0;
 348 }
 349 
 350 void
 351 cleanup_module(void)
     /*  */
 352 {
 353         if (MOD_IN_USE)
 354                 printk("smc-ultra: device busy, remove delayed\n");
 355         else
 356         {
 357                 int ioaddr = dev_ultra.base_addr - ULTRA_NIC_OFFSET;
 358 
 359                 unregister_netdev(&dev_ultra);
 360 
 361                 /* If we don't do this, we can't re-insmod it later. */
 362         release_region(ioaddr, ULTRA_IO_EXTENT);
 363         }
 364 }
 365 #endif /* MODULE */
 366 
 367 
 368 /*
 369  * Local variables:
 370  *  compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c"
 371  *  version-control: t
 372  *  kept-new-versions: 5
 373  *  c-indent-level: 4
 374  *  tab-width: 4
 375  * End:
 376  */
/* */
root/drivers/net/smc-ultra.c

DEFINITIONS
