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
   1 /* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
   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 driver for the SMC Ultra ethercard.
  16 
  17 */
  18 
  19 static char *version =
  20         "smc-ultra.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  21 
  22 #include <linux/config.h>
  23 #include <linux/kernel.h>
  24 #include <linux/sched.h>
  25 #include <linux/errno.h>
  26 #include <linux/string.h>
  27 #include <asm/io.h>
  28 #include <asm/system.h>
  29 
  30 #include <linux/netdevice.h>
  31 #include "8390.h"
  32 extern struct device *init_etherdev(struct device *dev, int sizeof_private,
  33                                                                         unsigned long *mem_startp);
  34 
  35 /* A zero-terminated list of I/O addresses to be probed. */
  36 static unsigned int ultra_portlist[] =
  37 {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
  38 
  39 int ultra_probe(struct device *dev);
  40 int ultra_probe1(struct device *dev, int ioaddr);
  41 
  42 static int ultra_open(struct device *dev);
  43 static void ultra_reset_8390(struct device *dev);
  44 static int ultra_block_input(struct device *dev, int count,
  45                                                   char *buf, int ring_offset);
  46 static void ultra_block_output(struct device *dev, int count,
  47                                                         const unsigned char *buf, const start_page);
  48 static int ultra_close_card(struct device *dev);
  49 
  50 
  51 #define START_PG                0x00    /* First page of TX buffer */
  52 
  53 #define ULTRA_CMDREG    0               /* Offset to ASIC command register. */
  54 #define  ULTRA_RESET    0x80    /* Board reset, in ULTRA_CMDREG. */
  55 #define  ULTRA_MEMENB   0x40    /* Enable the shared memory. */
  56 #define ULTRA_NIC_OFFSET  16    /* NIC register offset from the base_addr. */
  57 #define ULTRA_IO_EXTENT 32
  58 
  59 /*      Probe for the Ultra.  This looks like a 8013 with the station
  60         address PROM at I/O ports <base>+8 to <base>+13, with a checksum
  61         following.
  62 */
  63 #ifdef HAVE_DEVLIST
  64 struct netdev_entry ultra_drv =
  65 {"ultra", ultra_probe1, NETCARD_IO_EXTENT, netcard_portlist};
  66 #else
  67 
  68 int ultra_probe(struct device *dev)
     /*  */
  69 {
  70         int i;
  71         int base_addr = dev ? dev->base_addr : 0;
  72 
  73         if (base_addr > 0x1ff)          /* Check a single specified location. */
  74                 return ultra_probe1(dev, base_addr);
  75         else if (base_addr != 0)        /* Don't probe at all. */
  76                 return ENXIO;
  77 
  78         for (i = 0; ultra_portlist[i]; i++) {
  79                 int ioaddr = ultra_portlist[i];
  80                 if (check_region(ioaddr, ULTRA_IO_EXTENT))
  81                         continue;
  82                 if (ultra_probe1(dev, ioaddr) == 0)
  83                         return 0;
  84         }
  85 
  86         return ENODEV;
  87 }
  88 #endif
  89 
  90 int ultra_probe1(struct device *dev, int ioaddr)
     /*  */
  91 {
  92         int i;
  93         int checksum = 0;
  94         char *model_name;
  95         unsigned char eeprom_irq = 0;
  96         /* Values from various config regs. */
  97         unsigned char num_pages, irqreg, addr, reg4 = inb(ioaddr + 4) & 0x7f;
  98 
  99         /* Check the ID nibble. */
 100         if ((inb(ioaddr + 7) & 0xF0) != 0x20)
 101                 return ENODEV;
 102 
 103         /* Select the station address register set. */
 104         outb(reg4, ioaddr + 4);
 105 
 106         for (i = 0; i < 8; i++)
 107                 checksum += inb(ioaddr + 8 + i);
 108         if ((checksum & 0xff) != 0xFF)
 109                 return ENODEV;
 110 
 111         if (dev == NULL)
 112                 dev = init_etherdev(0, sizeof(struct ei_device), 0);
 113 
 114         printk("%s: SMC Ultra at %#3x,", dev->name, ioaddr);
 115 
 116         for (i = 0; i < 6; i++)
 117                 printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
 118 
 119         /* Switch from the station address to the alternate register set and
 120            read the useful registers there. */
 121         outb(0x80 | reg4, ioaddr + 4);
 122 
 123         /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
 124         outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
 125         irqreg = inb(ioaddr + 0xd);
 126         addr = inb(ioaddr + 0xb);
 127 
 128         /* Switch back to the station address register set so that the MS-DOS driver
 129            can find the card after a warm boot. */
 130         outb(reg4, ioaddr + 4);
 131 
 132         model_name = "SMC Ultra";
 133 
 134         if (dev->irq < 2) {
 135                 unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
 136                 int irq;
 137 
 138                 /* The IRQ bits are split. */
 139                 irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
 140 
 141                 if (irq == 0) {
 142                         printk(", failed to detect IRQ line.\n");
 143                         return -EAGAIN;
 144                 }
 145                 dev->irq = irq;
 146                 eeprom_irq = 1;
 147         }
 148 
 149 
 150         /* OK, were are certain this is going to work.  Setup the device. */
 151         snarf_region(ioaddr, 32);
 152 
 153         /* The 8390 isn't at the base address, so fake the offset */
 154         dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
 155 
 156         {
 157                 int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
 158                 short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
 159 
 160                 dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
 161                 num_pages = num_pages_tbl[(addr >> 4) & 3];
 162         }
 163 
 164         ethdev_init(dev);
 165 
 166         ei_status.name = model_name;
 167         ei_status.word16 = 1;
 168         ei_status.tx_start_page = START_PG;
 169         ei_status.rx_start_page = START_PG + TX_PAGES;
 170         ei_status.stop_page = num_pages;
 171 
 172         dev->rmem_start = dev->mem_start + TX_PAGES*256;
 173         dev->mem_end = dev->rmem_end
 174                 = dev->mem_start + (ei_status.stop_page - START_PG)*256;
 175 
 176         printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
 177                    dev->irq, dev->mem_start, dev->mem_end-1);
 178         if (ei_debug > 0)
 179                 printk(version);
 180 
 181         ei_status.reset_8390 = &ultra_reset_8390;
 182         ei_status.block_input = &ultra_block_input;
 183         ei_status.block_output = &ultra_block_output;
 184         dev->open = &ultra_open;
 185         dev->stop = &ultra_close_card;
 186         NS8390_init(dev, 0);
 187 
 188         return 0;
 189 }
 190 
 191 static int
 192 ultra_open(struct device *dev)
     /*  */
 193 {
 194         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 195 
 196         if (request_irq(dev->irq, ei_interrupt, 0, "SMC Ultra"))
 197                 return -EAGAIN;
 198 
 199         outb(ULTRA_MEMENB, ioaddr);     /* Enable memory, 16 bit mode. */
 200         outb(0x80, ioaddr + 5);
 201         outb(0x01, ioaddr + 6);         /* Enable interrupts and memory. */
 202         return ei_open(dev);
 203 }
 204 
 205 static void
 206 ultra_reset_8390(struct device *dev)
     /*  */
 207 {
 208         int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
 209 
 210         outb(ULTRA_RESET, cmd_port);
 211         if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
 212         ei_status.txing = 0;
 213 
 214         outb(ULTRA_MEMENB, cmd_port);
 215 
 216         if (ei_debug > 1) printk("reset done\n");
 217         return;
 218 }
 219 
 220 /* Block input and output are easy on shared memory ethercards, the only
 221    complication is when the ring buffer wraps. */
 222 
 223 static int
 224 ultra_block_input(struct device *dev, int count, char *buf, int ring_offset)
     /*  */
 225 {
 226         void *xfer_start = (void *)(dev->mem_start + ring_offset
 227                                                                 - (START_PG<<8));
 228 
 229         if (xfer_start + count > (void*) dev->rmem_end) {
 230                 /* We must wrap the input move. */
 231                 int semi_count = (void*)dev->rmem_end - xfer_start;
 232                 memcpy(buf, xfer_start, semi_count);
 233                 count -= semi_count;
 234                 memcpy(buf + semi_count, (char *)dev->rmem_start, count);
 235                 return dev->rmem_start + count;
 236         }
 237         memcpy(buf, xfer_start, count);
 238 
 239         return ring_offset + count;
 240 }
 241 
 242 static void
 243 ultra_block_output(struct device *dev, int count, const unsigned char *buf,
     /*  */
 244                                 int start_page)
 245 {
 246         unsigned char *shmem
 247                 = (unsigned char *)dev->mem_start + ((start_page - START_PG)<<8);
 248 
 249         memcpy(shmem, buf, count);
 250 
 251 }
 252 
 253 static int
 254 ultra_close_card(struct device *dev)
     /*  */
 255 {
 256         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
 257 
 258         dev->start = 0;
 259         dev->tbusy = 1;
 260 
 261         if (ei_debug > 1)
 262                 printk("%s: Shutting down ethercard.\n", dev->name);
 263 
 264         outb(0x00, ioaddr + 6);         /* Disable interrupts. */
 265         free_irq(dev->irq);
 266         irq2dev_map[dev->irq] = 0;
 267 
 268         NS8390_init(dev, 0);
 269 
 270         /* We should someday disable shared memory and change to 8-bit mode
 271            "just in case"... */
 272 
 273         return 0;
 274 }
 275 
 276 
 277 /*
 278  * Local variables:
 279  *  compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c"
 280  *  version-control: t
 281  *  kept-new-versions: 5
 282  *  c-indent-level: 4
 283  *  tab-width: 4
 284  * End:
 285  */
/* */
root/drivers/net/smc-ultra.c

DEFINITIONS
