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Annotation of Gnu-Mach/i386/i386at/gpl/if_hpp.c, revision 1.1

1.1     ! root        1: /*
        !             2:         Written 1994 by Donald Becker.
        !             3: 
        !             4:         This driver is for the Hewlett Packard PC LAN (27***) plus ethercards.
        !             5:         These cards are sold under several model numbers, usually 2724*.
        !             6: 
        !             7:         This software may be used and distributed according to the terms
        !             8:         of the GNU Public License, incorporated herein by reference.
        !             9: 
        !            10:         The author may be reached as [email protected], or C/O
        !            11: 
        !            12:         Center of Excellence in Space Data and Information Sciences
        !            13:                 Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
        !            14: 
        !            15:         As is often the case, a great deal of credit is owed to Russ Nelson.
        !            16:         The Crynwr packet driver was my primary source of HP-specific
        !            17:         programming information.
        !            18: */
        !            19: 
        !            20: /*
        !            21:  * Ported to mach by Stephen Clawson, [email protected]
        !            22:  * University of Utah CSL.
        !            23:  *
        !            24:  * Derived from the Linux driver by Donald Becker.
        !            25:  * 
        !            26:  * Also uses code Shantanu Goel adapted from Donald Becker
        !            27:  * for ns8930 support.
        !            28:  *
        !            29:  */
        !            30: 
        !            31: #include <hpp.h>
        !            32: #if NHPP > 0
        !            33: 
        !            34: #include <sys/types.h>
        !            35: #include "vm_param.h"
        !            36: #include <kern/time_out.h>
        !            37: #include <device/device_types.h>
        !            38: #include <device/errno.h>
        !            39: #include <device/io_req.h>
        !            40: #include <device/if_hdr.h>
        !            41: #include <device/if_ether.h>
        !            42: #include <device/net_status.h>
        !            43: #include <device/net_io.h>
        !            44: #include <chips/busses.h>
        !            45: #include <i386/ipl.h>
        !            46: #include <i386/pio.h>
        !            47: #include <i386at/gpl/if_nsreg.h>
        !            48: 
        !            49: 
        !            50: /*
        !            51:  * XXX - This is some gross glue garbage.  The io instructions really
        !            52:  * should be integrated into pio.h...
        !            53:  */
        !            54: #define IO_DELAY __asm__ __volatile__("outb %al,$0x80")
        !            55: #define outb_p(p, v)    { outb(p, v); IO_DELAY; }
        !            56: #define inb_p(p)        ({ unsigned char _v; _v = inb(p); IO_DELAY; _v; })
        !            57: 
        !            58: 
        !            59: static __inline void
        !            60: insw(u_short port, void *addr, int cnt)
        !            61: {
        !            62:         __asm __volatile("cld\n\trepne\n\tinsw" :
        !            63:                          : "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx");
        !            64: }
        !            65: 
        !            66: static __inline void
        !            67: outsw(u_short port, void *addr, int cnt)
        !            68: {
        !            69:         __asm __volatile("cld\n\trepne\n\toutsw" :
        !            70:                          : "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
        !            71: }
        !            72: 
        !            73: 
        !            74: /*
        !            75:    The HP EtherTwist chip implementation is a fairly routine DP8390
        !            76:    implementation.  It allows both shared memory and programmed-I/O buffer
        !            77:    access, using a custom interface for both.  The programmed-I/O mode is
        !            78:    entirely implemented in the HP EtherTwist chip, bypassing the problem
        !            79:    ridden built-in 8390 facilities used on NE2000 designs.  The shared
        !            80:    memory mode is likewise special, with an offset register used to make
        !            81:    packets appear at the shared memory base.  Both modes use a base and bounds
        !            82:    page register to hide the Rx ring buffer wrap -- a packet that spans the
        !            83:    end of physical buffer memory appears continuous to the driver. (c.f. the
        !            84:    3c503 and Cabletron E2100)
        !            85: 
        !            86:    A special note: the internal buffer of the board is only 8 bits wide.
        !            87:    This lays several nasty traps for the unaware:
        !            88:    - the 8390 must be programmed for byte-wide operations
        !            89:    - all I/O and memory operations must work on whole words (the access
        !            90:      latches are serially preloaded and have no byte-swapping ability).
        !            91: 
        !            92:    This board is laid out in I/O space much like the earlier HP boards:
        !            93:    the first 16 locations are for the board registers, and the second 16 are
        !            94:    for the 8390.  The board is easy to identify, with both a dedicated 16 bit
        !            95:    ID register and a constant 0x530* value in the upper bits of the paging
        !            96:    register.
        !            97: */
        !            98: 
        !            99: #define HP_ID                  0x00    /* ID register, always 0x4850. */
        !           100: #define HP_PAGING              0x02    /* Registers visible @ 8-f, see PageName. */ 
        !           101: #define HPP_OPTION             0x04    /* Bitmapped options, see HP_Option.*/
        !           102: #define HPP_OUT_ADDR           0x08    /* I/O output location in Perf_Page.*/
        !           103: #define HPP_IN_ADDR            0x0A    /* I/O input location in Perf_Page.*/
        !           104: #define HP_DATAPORT            0x0c    /* I/O data transfer in Perf_Page.*/
        !           105: #define HPP_NIC_OFFSET         0x10    /* Offset to the 8390 registers.*/
        !           106: #define HP_IO_EXTENT           32
        !           107: 
        !           108: #define HP_START_PG            0x00    /* First page of TX buffer */
        !           109: #define HP_STOP_PG             0x80    /* Last page +1 of RX ring */
        !           110: /*#define HP_STOP_PG           0x1f
        !           111: 
        !           112: /* The register set selected in HP_PAGING. */
        !           113: enum PageName {
        !           114:        Perf_Page       = 0,            /* Normal operation. */
        !           115:        MAC_Page        = 1,            /* The ethernet address (+checksum). */
        !           116:        HW_Page         = 2,            /* EEPROM-loaded hw parameters. */
        !           117:        LAN_Page        = 4,            /* Transciever type, testing, etc. */
        !           118:        ID_Page         = 6 }; 
        !           119: 
        !           120: /* The bit definitions for the HPP_OPTION register. */
        !           121: enum HP_Option {
        !           122:        NICReset        = 1,            /* Active low, really UNreset. */
        !           123:        ChipReset       = 2, 
        !           124:        EnableIRQ       = 4, 
        !           125:        FakeIntr        = 8, 
        !           126:        BootROMEnb      = 0x10, 
        !           127:        IOEnb           = 0x20,
        !           128:        MemEnable       = 0x40, 
        !           129:        ZeroWait        = 0x80, 
        !           130:        MemDisable      = 0x1000, };
        !           131: 
        !           132: 
        !           133: void hpp_reset_8390(struct nssoftc *ns);
        !           134: 
        !           135: void hpp_mem_block_input(struct nssoftc *ns, int, char *, int);
        !           136: int hpp_mem_block_output(struct nssoftc *ns, int, char *, int);
        !           137: void hpp_io_block_input(struct nssoftc *ns, int, char *, int);
        !           138: int hpp_io_block_output(struct nssoftc *ns, int,char *, int);
        !           139: 
        !           140: 
        !           141: /*
        !           142:  * Watchdog timer.
        !           143:  */
        !           144: int    hppwstart = 0;
        !           145: void   hppwatch(void);
        !           146: 
        !           147: 
        !           148: /* 
        !           149:  * Autoconfig structures.
        !           150:  */
        !           151: int hpp_std[] = { 0x200, 0x240, 0x280, 0x2C0, 0x300, 0x320, 0x340, 0 };
        !           152: struct         bus_device *hpp_info[NHPP];
        !           153: int    hpp_probe();
        !           154: void   hpp_attach();
        !           155: struct         bus_driver hppdriver = {
        !           156:        hpp_probe, 0, hpp_attach, 0, hpp_std, "hpp", hpp_info, 0, 0, 0
        !           157: };
        !           158: 
        !           159: 
        !           160: /* 
        !           161:  * ns8390 state.
        !           162:  */
        !           163: struct nssoftc hppnssoftc[NHPP];
        !           164: 
        !           165: 
        !           166: /*
        !           167:  * hpp state.
        !           168:  */
        !           169: struct hppsoftc {
        !           170:        unsigned long   rmem_start;     /* shmem "recv" start */
        !           171:        unsigned long   rmem_end;       /* shmem "recv" end */
        !           172:        unsigned long   mem_start;      /* shared mem start */
        !           173:        unsigned long   mem_end;        /* shared mem end */
        !           174: } hppsoftc[NHPP];
        !           175: 
        !           176: 
        !           177: /* 
        !           178:  * Probe a list of addresses for the card.
        !           179:  *
        !           180:  */
        !           181: int hpp_probe(port, dev)
        !           182:        int     port;
        !           183:        struct  bus_device *dev;
        !           184: {
        !           185:        int unit = dev->unit;
        !           186:        char *str = "hp-plus ethernet board %d out of range.\n";
        !           187:        caddr_t base = (caddr_t) (dev ? dev->address : 0);
        !           188:        int i;
        !           189: 
        !           190:        if ((unit < 0) || (unit >= NHPP)) {
        !           191:                printf(str, unit);
        !           192:                return(0);
        !           193:        }
        !           194: 
        !           195:        /* Check a single specified location. */
        !           196:        if (base > (caddr_t) 0x1ff)   
        !           197:                return hpp_probe1(dev, base);
        !           198:        else if (base != 0)                             /* Don't probe at all. */
        !           199:                return 0;
        !           200: 
        !           201:        for (i = 0; hpp_std[i]; i++) {
        !           202:                int ioaddr = hpp_std[i];
        !           203: 
        !           204:                if ( ioaddr > 0 && hpp_probe1(dev, ioaddr) ) {
        !           205:                        dev->address = ioaddr;
        !           206:                        hpp_std[i] = -1;                /* Mark address used */
        !           207:                        return(1);
        !           208:                }
        !           209:        }
        !           210: 
        !           211:        return 0;
        !           212: }
        !           213: 
        !           214: 
        !           215: 
        !           216: /* 
        !           217:  * Do the interesting part of the probe at a single address. 
        !           218:  *
        !           219:  */
        !           220: int hpp_probe1(dev, ioaddr)
        !           221:        struct bus_device *dev;
        !           222:        int ioaddr;
        !           223: {
        !           224:        int i;
        !           225:        u_char checksum = 0;
        !           226:        int mem_start;
        !           227:        
        !           228:        struct hppsoftc *hpp = &hppsoftc[dev->unit];
        !           229:        struct nssoftc  *ns  = &hppnssoftc[dev->unit];
        !           230:        struct ifnet *ifp = &ns->sc_if;
        !           231: 
        !           232:        /* Check for the HP+ signature, 50 48 0x 53. */
        !           233:        if (inw(ioaddr + HP_ID) != 0x4850
        !           234:                || (inw(ioaddr + HP_PAGING) & 0xfff0) != 0x5300)
        !           235:                return 0;
        !           236: 
        !           237: 
        !           238:        printf("%s%d: HP PClan plus at %#3x,", dev->name, dev->unit, ioaddr); 
        !           239:        /* Retrieve and checksum the station address. */
        !           240:        outw(ioaddr + HP_PAGING, MAC_Page);
        !           241: 
        !           242:        printf("MAC_Page = %d, ioaddr = %x\n", MAC_Page, ioaddr);
        !           243: 
        !           244:        for(i = 0; i < ETHER_ADDR_LEN; i++) {
        !           245:                u_char inval = inb(ioaddr + 8 + i);
        !           246:                ns->sc_addr[i] = inval;  
        !           247:                checksum += inval;
        !           248:                printf(" %2.2x", inval);
        !           249:        }
        !           250:        checksum += inb(ioaddr + 14);
        !           251: 
        !           252:        if (checksum != 0xff) {
        !           253:                printf(" bad checksum %2.2x.\n", checksum);
        !           254:                return 0;
        !           255:        } else {
        !           256:                /* Point at the Software Configuration Flags. */
        !           257:                outw(ioaddr + HP_PAGING, ID_Page);
        !           258:                printf(" ID %4.4x", inw(ioaddr + 12));
        !           259:        }
        !           260: 
        !           261: 
        !           262:        /* Read the IRQ line. */
        !           263:        outw(ioaddr + HP_PAGING, HW_Page);
        !           264:        {
        !           265:                int irq = inb(ioaddr + 13) & 0x0f;
        !           266:                int option = inw(ioaddr + HPP_OPTION);
        !           267: 
        !           268:                dev->sysdep1 = irq;
        !           269:                take_dev_irq(dev);
        !           270: 
        !           271:                if (option & MemEnable) {
        !           272:                        mem_start = inw(ioaddr + 9) << 8;
        !           273:                        printf(", IRQ %d, memory address %#x.\n", irq, mem_start);
        !           274:                } else {
        !           275:                        mem_start = 0;
        !           276:                        printf(", IRQ %d, programmed-I/O mode.\n", irq);
        !           277:                }
        !           278:        }
        !           279: 
        !           280:        /* Set the wrap registers for string I/O reads.   */
        !           281:        outw( ioaddr + 14, (HP_START_PG + TX_2X_PAGES) | ((HP_STOP_PG - 1) << 8));
        !           282: 
        !           283:        /* Set the base address to point to the NIC, not the "real" base! */
        !           284:        ns->sc_port = ioaddr + HPP_NIC_OFFSET;
        !           285: 
        !           286:        ns->sc_name = dev->name;
        !           287:        ns->sc_unit = dev->unit;
        !           288:        ns->sc_pingpong = 0;            /* turn off pingpong mode */
        !           289:        ns->sc_word16 = 0;              /* Agggghhhhh! Debug time: 2 days! */
        !           290:        ns->sc_txstrtpg = HP_START_PG;
        !           291:        ns->sc_rxstrtpg = HP_START_PG + TX_2X_PAGES;
        !           292:        ns->sc_stoppg = HP_STOP_PG;
        !           293:        
        !           294: 
        !           295:        ns->sc_reset = hpp_reset_8390;
        !           296:        ns->sc_input = hpp_io_block_input;
        !           297:        ns->sc_output = hpp_io_block_output;
        !           298: 
        !           299:        /* Check if the memory_enable flag is set in the option register. */
        !           300:        if (mem_start) {
        !           301:                ns->sc_input = hpp_mem_block_input;
        !           302:                ns->sc_output = hpp_mem_block_output;
        !           303:                hpp->mem_start = mem_start;
        !           304:                hpp->rmem_start = hpp->mem_start + TX_2X_PAGES * 256;
        !           305:                hpp->mem_end = hpp->rmem_end
        !           306:                        = hpp->mem_start + (HP_STOP_PG - HP_START_PG) * 256;
        !           307:        }
        !           308: 
        !           309:        outw(ioaddr + HP_PAGING, Perf_Page);
        !           310: 
        !           311:        /* Leave the 8390 and HP chip reset. */
        !           312:        outw( ioaddr + HPP_OPTION, inw(ioaddr + HPP_OPTION) & ~EnableIRQ );
        !           313: 
        !           314:        /*
        !           315:         * Initialize interface header.
        !           316:         */
        !           317:        ifp->if_unit = dev->unit;
        !           318:        ifp->if_mtu = ETHERMTU;
        !           319:        ifp->if_flags = IFF_BROADCAST;
        !           320:        ifp->if_header_size = sizeof(struct ether_header);
        !           321:        ifp->if_header_format = HDR_ETHERNET;
        !           322:        ifp->if_address_size = ETHER_ADDR_LEN;
        !           323:        ifp->if_address = ns->sc_addr;
        !           324:        if_init_queues(ifp);
        !           325: 
        !           326:        return (1);
        !           327: }
        !           328: 
        !           329: /*  
        !           330:  * XXX
        !           331:  *
        !           332:  * this routine really should do the invasive part of the setup.
        !           333:  */
        !           334: void
        !           335: hpp_attach(dev)
        !           336:        struct bus_device *dev;
        !           337: {
        !           338:        /* NULL */
        !           339: }
        !           340: 
        !           341: 
        !           342: 
        !           343: int
        !           344: hppopen(dev, flag)
        !           345:        dev_t   dev;
        !           346:        int     flag;
        !           347: {
        !           348:        int s, unit = minor(dev);
        !           349:        struct bus_device       *bd;
        !           350:        struct hppsoftc         *hpp;
        !           351:        struct nssoftc          *ns = &hppnssoftc[unit];
        !           352: 
        !           353:        int ioaddr = ns->sc_port - HPP_NIC_OFFSET;
        !           354:        int option_reg;
        !           355: 
        !           356:        if (unit < 0 || unit >= NHPP ||
        !           357:            (bd = hpp_info[unit]) == 0 || !(bd->alive))
        !           358:                return ENXIO;
        !           359: 
        !           360:        /*
        !           361:         * Start watchdog.
        !           362:         */
        !           363:        if (!hppwstart) {
        !           364:                hppwstart++;
        !           365:                timeout(hppwatch, 0, hz);
        !           366:        }
        !           367:        hpp = &hppsoftc[unit];
        !           368:        ns->sc_if.if_flags |= IFF_UP;
        !           369: 
        !           370:        s = splimp();
        !           371: 
        !           372:        /* Reset the 8390 and HP chip. */
        !           373:        option_reg = inw(ioaddr + HPP_OPTION);
        !           374:        outw( ioaddr + HPP_OPTION, option_reg & ~(NICReset + ChipReset) );
        !           375:        IO_DELAY; IO_DELAY;
        !           376: 
        !           377:        /* Unreset the board and enable interrupts. */
        !           378:        outw( ioaddr + HPP_OPTION, option_reg | (EnableIRQ + NICReset + ChipReset));
        !           379: 
        !           380:        /* Set the wrap registers for programmed-I/O operation.   */
        !           381:        outw( ioaddr + HP_PAGING, HW_Page );
        !           382:        outw( ioaddr + 14, (HP_START_PG + TX_2X_PAGES) | ((HP_STOP_PG - 1) << 8) );
        !           383: 
        !           384:        /* Select the operational page. */
        !           385:        outw( ioaddr + HP_PAGING, Perf_Page );
        !           386:        nsinit(ns);
        !           387: 
        !           388:        splx(s);
        !           389: 
        !           390:        return (0);
        !           391: }
        !           392: 
        !           393: /* 
        !           394:  * needs to be called at splimp()?
        !           395:  *
        !           396:  */
        !           397: void
        !           398: hpp_reset_8390(ns)
        !           399:        struct nssoftc *ns;
        !           400: {
        !           401:        int ioaddr = ns->sc_port - HPP_NIC_OFFSET;
        !           402:        int option_reg = inw(ioaddr + HPP_OPTION);
        !           403: 
        !           404:        outw( ioaddr + HPP_OPTION, option_reg & ~(NICReset + ChipReset) );
        !           405:        /* Pause a few cycles for the hardware reset to take place. */
        !           406:        IO_DELAY;
        !           407:        IO_DELAY;
        !           408:        ns->sc_txing = 0;
        !           409:        outw( ioaddr + HPP_OPTION, option_reg | (EnableIRQ + NICReset + ChipReset) );
        !           410: 
        !           411:        /*  
        !           412:         * XXX - I'm not sure there needs to be this many IO_DELAY's...
        !           413:         */
        !           414:        IO_DELAY; IO_DELAY;
        !           415:        IO_DELAY; IO_DELAY;
        !           416: 
        !           417:        if ((inb_p(ioaddr + HPP_NIC_OFFSET + EN0_ISR) & ENISR_RESET) == 0)
        !           418:                printf("%s: hp_reset_8390() did not complete.\n", ns->sc_name);
        !           419: 
        !           420:        return;
        !           421: }
        !           422: 
        !           423: 
        !           424: /* 
        !           425:  * Block input and output, similar to the Crynwr packet driver.
        !           426:  * Note that transfer with the EtherTwist+ must be on word boundaries. 
        !           427:  */
        !           428: void
        !           429: hpp_io_block_input(ns, count, buf, ring_offset)
        !           430:        struct nssoftc *ns;
        !           431:        int count;
        !           432:        char *buf;
        !           433:        int ring_offset;
        !           434: {
        !           435:        int ioaddr = ns->sc_port - HPP_NIC_OFFSET;
        !           436: 
        !           437:        outw(ioaddr + HPP_IN_ADDR, ring_offset);
        !           438: 
        !           439:        insw(ioaddr + HP_DATAPORT, buf, count >> 1 );
        !           440: 
        !           441:        if (count & 0x01)
        !           442:                  buf[count-1] = (char) inw(ioaddr + HP_DATAPORT);
        !           443: 
        !           444: }
        !           445: 
        !           446: void
        !           447: hpp_mem_block_input(ns, count, buf, ring_offset)
        !           448:        struct nssoftc *ns;
        !           449:        int count;
        !           450:        char *buf;
        !           451:        int ring_offset;
        !           452: {
        !           453:        int ioaddr = ns->sc_port - HPP_NIC_OFFSET;
        !           454:        int option_reg = inw(ioaddr + HPP_OPTION);
        !           455:        char *mem_start = (char *)phystokv(hppsoftc[ns->sc_unit].mem_start);
        !           456:        
        !           457:        outw(ioaddr + HPP_IN_ADDR, ring_offset);
        !           458:        outw(ioaddr + HPP_OPTION, option_reg & ~(MemDisable + BootROMEnb));
        !           459: 
        !           460:        /* copy as much as we can straight through */
        !           461:        bcopy16(mem_start, buf, count & ~1);
        !           462: 
        !           463:        /* Now we copy that last byte. */
        !           464:        if (count & 0x01) {
        !           465:                u_short savebyte[2];
        !           466: 
        !           467:                bcopy16(mem_start + (count & ~1), savebyte, 2);
        !           468:                buf[count-1] = savebyte[0];
        !           469:        }
        !           470: 
        !           471:        outw(ioaddr + HPP_OPTION, option_reg);
        !           472: }
        !           473: 
        !           474: 
        !           475: /*
        !           476:  * output data into NIC buffers.
        !           477:  *
        !           478:  * NOTE: All transfers must be on word boundaries.
        !           479:  */
        !           480: int
        !           481: hpp_io_block_output(ns, count, buf, start_page)
        !           482:        struct nssoftc *ns;
        !           483:        int count;
        !           484:        char *buf;
        !           485:        int start_page;
        !           486: {
        !           487:        int ioaddr = ns->sc_port - HPP_NIC_OFFSET;
        !           488: 
        !           489:        outw(ioaddr + HPP_OUT_ADDR, start_page << 8) ;
        !           490: 
        !           491:        if (count > 1) {
        !           492:                outsw(ioaddr + HP_DATAPORT, buf, count >> 1);
        !           493:        }
        !           494: 
        !           495:        if ( (count & 1) == 1 ) {
        !           496:                u_char savebyte[2];
        !           497: 
        !           498:                savebyte[1] = 0;
        !           499:                savebyte[0] = buf[count - 1];
        !           500:                outw(ioaddr + HP_DATAPORT, *(u_short *)savebyte); 
        !           501:        }
        !           502: 
        !           503:        if (count < (ETHERMIN + sizeof( struct ether_header )))
        !           504:                count = ETHERMIN + sizeof( struct ether_header );
        !           505: 
        !           506: 
        !           507:        return (count) ;
        !           508: }
        !           509: 
        !           510: 
        !           511: /* XXX
        !           512:  *
        !           513:  * I take great pains to not try and bcopy past the end of the buffer,
        !           514:  * does this matter?  Are the io request buffers the exact byte size?
        !           515:  */
        !           516: int
        !           517: hpp_mem_block_output(ns, count, buf, start_page )
        !           518:        struct nssoftc *ns;
        !           519:        int count;
        !           520:        char *buf;
        !           521:        int start_page;
        !           522: {
        !           523:        int ioaddr = ns->sc_port - HPP_NIC_OFFSET;
        !           524:        int option_reg = inw(ioaddr + HPP_OPTION);
        !           525:        struct hppsoftc *hpp = &hppsoftc[ns->sc_unit];
        !           526:        char *shmem;
        !           527: 
        !           528:        outw(ioaddr + HPP_OUT_ADDR, start_page << 8);
        !           529:        outw(ioaddr + HPP_OPTION, option_reg & ~(MemDisable + BootROMEnb));
        !           530: 
        !           531:        shmem = (char *)phystokv(hpp->mem_start);
        !           532:        bcopy16(buf, shmem, count & ~1);
        !           533: 
        !           534:        if ( (count & 1) == 1 ) {
        !           535:                u_char savebyte[2];
        !           536:                
        !           537:                savebyte[1] = 0;
        !           538:                savebyte[0] = buf[count - 1];
        !           539:                bcopy16(savebyte, shmem + (count & ~1), 2);
        !           540:        }
        !           541: 
        !           542:        while (count < ETHERMIN + sizeof(struct ether_header)) {
        !           543:                *(shmem + count) = 0;
        !           544:                count++;
        !           545:        }
        !           546: 
        !           547:        outw(ioaddr + HPP_OPTION, option_reg);
        !           548: 
        !           549:        return count;
        !           550: }
        !           551: 
        !           552: 
        !           553: int
        !           554: hppintr(unit)
        !           555:        int unit;
        !           556: {
        !           557:        nsintr(&hppnssoftc[unit]);
        !           558:        
        !           559:        return(0);
        !           560: }
        !           561: 
        !           562: void
        !           563: hppstart(unit)
        !           564:        int unit;
        !           565: {
        !           566:        nsstart(&hppnssoftc[unit]);
        !           567: }
        !           568: 
        !           569: int hppoutput();
        !           570: 
        !           571: int
        !           572: hppoutput(dev, ior)
        !           573:        dev_t dev;
        !           574:        io_req_t ior;
        !           575: {
        !           576:        int unit = minor(dev);
        !           577:        struct bus_device *ui;
        !           578: 
        !           579:        if (unit >= NHPP || (ui = hpp_info[unit]) == 0 || ui->alive == 0)
        !           580:                return (ENXIO);
        !           581: 
        !           582:        return (net_write(&hppnssoftc[unit].sc_if, hppstart, ior));
        !           583: }
        !           584: 
        !           585: 
        !           586: int
        !           587: hppsetinput(dev, receive_port, priority, filter, filter_count)
        !           588:        dev_t dev;
        !           589:        mach_port_t receive_port;
        !           590:        int priority;
        !           591:        filter_t *filter;
        !           592:        unsigned filter_count;
        !           593: {
        !           594:        int unit = minor(dev);
        !           595:        struct bus_device *ui;
        !           596: 
        !           597:        if (unit >= NHPP || (ui = hpp_info[unit]) == 0 || ui->alive == 0)
        !           598:                return (ENXIO);
        !           599: 
        !           600:        return (net_set_filter(&hppnssoftc[unit].sc_if, receive_port,
        !           601:                               priority, filter, filter_count));
        !           602: }
        !           603: 
        !           604: 
        !           605: int
        !           606: hppgetstat(dev, flavor, status, count)
        !           607:        dev_t dev;
        !           608:        int flavor;
        !           609:        dev_status_t status;
        !           610:        unsigned *count;
        !           611: {
        !           612:        int unit = minor(dev);
        !           613:        struct bus_device *ui;
        !           614: 
        !           615:        if (unit >= NHPP || (ui = hpp_info[unit]) == 0 || ui->alive == 0)
        !           616:                return (ENXIO);
        !           617: 
        !           618:        return (net_getstat(&hppnssoftc[unit].sc_if, flavor, status, count));
        !           619: }
        !           620: 
        !           621: 
        !           622: int
        !           623: hppsetstat(dev, flavor, status, count)
        !           624:        dev_t dev;
        !           625:        int flavor;
        !           626:        dev_status_t status;
        !           627:        unsigned count;
        !           628: {
        !           629:        int unit = minor(dev), oflags, s;
        !           630:        struct bus_device *ui;
        !           631:        struct ifnet *ifp;
        !           632:        struct net_status *ns;
        !           633: 
        !           634:        if (unit >= NHPP || (ui = hpp_info[unit]) == 0 || ui->alive == 0)
        !           635:                return (ENXIO);
        !           636: 
        !           637:        ifp = &hppnssoftc[unit].sc_if;
        !           638: 
        !           639:        switch (flavor) {
        !           640: 
        !           641:        case NET_STATUS:
        !           642:                if (count < NET_STATUS_COUNT)
        !           643:                        return (D_INVALID_SIZE);
        !           644:                ns = (struct net_status *)status;
        !           645:                oflags = ifp->if_flags & (IFF_ALLMULTI|IFF_PROMISC);
        !           646:                ifp->if_flags &= ~(IFF_ALLMULTI|IFF_PROMISC);
        !           647:                ifp->if_flags |= ns->flags & (IFF_ALLMULTI|IFF_PROMISC);
        !           648:                if ((ifp->if_flags & (IFF_ALLMULTI|IFF_PROMISC)) != oflags) {
        !           649:                        s = splimp();
        !           650:                        nsinit(&hppnssoftc[unit]);
        !           651:                        splx(s);
        !           652:                }
        !           653:                break;
        !           654: 
        !           655:        default:
        !           656:                return (D_INVALID_OPERATION);
        !           657:        }
        !           658:        return (D_SUCCESS);
        !           659: }
        !           660: 
        !           661: /*
        !           662:  * Watchdog.
        !           663:  * Check for hung transmissions.
        !           664:  */
        !           665: void
        !           666: hppwatch()
        !           667: {
        !           668:        int unit, s;
        !           669:        struct nssoftc *ns;
        !           670: 
        !           671:        timeout(hppwatch, 0, hz);
        !           672: 
        !           673:        s = splimp();
        !           674:        for (unit = 0; unit < NHPP; unit++) {
        !           675:                if (hpp_info[unit] == 0 || hpp_info[unit]->alive == 0)
        !           676:                        continue;
        !           677:                ns = &hppnssoftc[unit];
        !           678:                if (ns->sc_timer && --ns->sc_timer == 0) {
        !           679:                        printf("hpp%d: transmission timeout\n", unit);
        !           680:                        (*ns->sc_reset)(ns);
        !           681:                        nsinit(ns);
        !           682:                }
        !           683:        }
        !           684:        splx(s);
        !           685: }
        !           686: 
        !           687: 
        !           688: #endif /* NHPP > 0 */
        !           689: 
        !           690: 

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