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freebsd-skq/sys/i386/isa/if_wl.c
Peter Wemm 4c728676b7 Make the multicast code compile under -current. This has not been reviewed 
or tested yet.  Mike may want to make some adjustments.
1997-05-25 07:17:02 +00:00

2303 lines
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/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain all copyright
* notices, this list of conditions and the following disclaimer.
* 2. The names of the authors may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* if_wl.c - original MACH, then BSDI ISA wavelan driver
* ported to mach by Anders Klemets
* to BSDI by Robert Morris
* to FreeBSD by Jim Binkley
* to FreeBSD 2.2+ by Michael Smith
*
* 2.2 update:
* Changed interface to match 2.1-2.2 differences.
* Implement IRQ selection logic in wlprobe()
* Implement PSA updating.
* Pruned heading comments for relevance.
* Ripped out all the 'interface counters' cruft.
* Cut the missing-interrupt timer back to 100ms.
*
* Work done:
* Ported to FreeBSD, got promiscuous mode working with bpfs,
* and rewired timer routine. The i82586 will hang occasionally on output
* and the watchdog timer will kick it if so and log an entry.
* 2 second timeout there. Apparently the chip loses an interrupt.
* Code borrowed from if_ie.c for watchdog timer.
*
* The wavelan card is a 2mbit radio modem that emulates ethernet;
* i.e., it uses MAC addresses. This should not be a surprise since
* it uses an ethernet controller as a major hw item.
* It can broadcast, unicast or apparently multicast in a base cell
* using a omni-directional antennae that is
* about 800 feet around the base cell barring walls and metal.
* With directional antennae, it can be used point to point over a mile
* or so apparently (haven't tried that).
*
* There are ISA and pcmcia versions (not supported by this code).
* The ISA card has an Intel 82586 lan controller on it. It consists
* of 2 pieces of hw, the lan controller (intel) and a radio-modem.
* The latter has an extra set of controller registers that has nothing
* to do with the i82586 and allows setting and monitoring of radio
* signal strength, etc. There is a nvram area called the PSA that
* contains a number of setup variables including the IRQ and so-called
* NWID or Network ID. The NWID must be set the same for all radio
* cards to communicate (unless you are using the ATT/NCR roaming feature
* with their access points. There is no support for that here. Roaming
* involves a link-layer beacon sent out from the access points. End
* stations monitor the signal strength and only use the strongest
* access point). This driver assumes that the base ISA port, IRQ,
* and NWID are first set in nvram via the dos-side "instconf.exe" utility
* supplied with the card. This driver takes the ISA port from
* the kernel configuration setup, and then determines the IRQ either
* from the kernel config (if an explicit IRQ is set) or from the
* PSA on the card if not.
* The hw also magically just uses the IRQ set in the nvram.
* The NWID is used magically as well by the radio-modem
* to determine which packets to keep or throw out.
*
* sample config:
*
* device wl0 at isa? port 0x300 net irq ? vector wlintr
*
* Ifdefs:
* 1. IF_CNTRS - haven't tried it. Can get out various bits of info
* from the rf-modem.
* 2. WLDEBUG if turned on enables IFF_DEBUG set via ifconfig debug
* 3. MULTICAST - turned on and works in a few simple tests.
*
* one further note: promiscuous mode is a curious thing. In this driver,
* promiscuous mode apparently will catch ALL packets and ignore the NWID
* setting. This is probably more useful in a sense (for snoopers) if
* you are interested in all traffic as opposed to if you are interested
* in just your own.
*/
#define MULTICAST 1
/*
* Olivetti PC586 Mach Ethernet driver v1.0
* Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989
* All rights reserved.
*
*/
/*
Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
Cupertino, California.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appears in all
copies and that both the copyright notice and this permission notice
appear in supporting documentation, and that the name of Olivetti
not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.
OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
Copyright 1988, 1989 by Intel Corporation, Santa Clara, California.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appears in all
copies and that both the copyright notice and this permission notice
appear in supporting documentation, and that the name of Intel
not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.
INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* NOTE:
* by rvb:
* 1. The best book on the 82586 is:
* LAN Components User's Manual by Intel
* The copy I found was dated 1984. This really tells you
* what the state machines are doing
* 2. In the current design, we only do one write at a time,
* though the hardware is capable of chaining and possibly
* even batching. The problem is that we only make one
* transmit buffer available in sram space.
*/
#include "wl.h"
#include "opt_wavelan.h"
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#if __FreeBSD__ >= 3
#include <sys/sockio.h>
#else
#include <sys/ioctl.h>
#endif
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#include <machine/cpufunc.h>
#include <machine/clock.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/icu.h>
#include <i386/isa/ic/if_wl_i82586.h> /* Definitions for the Intel chip */
/* was 1000 in original, fed to DELAY(x) */
#define DELAYCONST 1000
#include <i386/isa/if_wl.h>
#include <machine/if_wl_wavelan.h>
static char t_packet[ETHERMTU + sizeof(struct ether_header) + sizeof(long)];
struct wl_softc{
struct arpcom wl_ac; /* Ethernet common part */
#define wl_if wl_ac.ac_if /* network visible interface */
#define wl_addr wl_ac.ac_enaddr /* hardware address */
u_char psa[0x40];
u_char nwid[2]; /* current radio modem nwid */
short base;
short unit;
int flags;
int tbusy; /* flag to determine if xmit is busy */
u_short begin_fd;
u_short end_fd;
u_short end_rbd;
u_short hacr; /* latest host adapter CR command */
short mode;
};
static struct wl_softc wl_softc[NWL];
#define WLSOFTC(unit) ((struct wl_softc *)(&wl_softc[unit]))
static int wlprobe(struct isa_device *);
static int wlattach(struct isa_device *);
void wlintr(int); /* no, not static */
struct isa_driver wldriver = {
wlprobe, wlattach, "wl", 0
};
/*
* XXX The Wavelan appears to be prone to dropping stuff if you talk to
* it too fast. This disgusting hack inserts a delay after each packet
* is queued that helps avoid this behaviour on fast systems.
*/
static int wl_xmit_delay = 0;
SYSCTL_INT(_machdep, OID_AUTO, wl_xmit_delay, CTLFLAG_RW, &wl_xmit_delay, 0, "");
/*
* Emit diagnostics about transmission problems
*/
static int xmt_watch = 0;
SYSCTL_INT(_machdep, OID_AUTO, wl_xmit_watch, CTLFLAG_RW, &xmt_watch, 0, "");
/*
* Collect SNR statistics
*/
static int gathersnr = 0;
SYSCTL_INT(_machdep, OID_AUTO, wl_gather_snr, CTLFLAG_RW, &gathersnr, 0, "");
static void wlstart(struct ifnet *ifp);
static void wlinit(void *xsc);
static int wlioctl(struct ifnet *ifp, int cmd, caddr_t data);
static void wlwatchdog(struct wl_softc *sc);
static void wlxmt(int unt, struct mbuf *m);
static int wldiag(int unt);
static int wlconfig(int unit);
static int wlcmd(int unit, char *str);
static void wlmmcstat(int unit);
static u_short wlbldru(int unit);
static u_short wlmmcread(u_int base, u_short reg);
static void wlinitmmc(int unit);
static void wlsetirq(int base, int irq);
static int wlhwrst(int unit);
static void wlrustrt(int unit);
static void wlbldcu(int unit);
static int wlack(int unit);
static int wlread(int unit, u_short fd_p);
static void getsnr(int unit);
static void wlrcv(int unit);
static int wlrequeue(int unit, u_short fd_p);
static void wlsftwsleaze(u_short *countp, u_char **mb_pp, struct mbuf **tm_pp, int unit);
static void wlhdwsleaze(u_short *countp, u_char **mb_pp, struct mbuf **tm_pp, int unit);
static void wltbd(int unit);
static void wlgetpsa(int base, u_char *buf);
static void wlsetpsa(int unit);
static u_short wlpsacrc(u_char *buf);
static void wldump(int unit);
/* array for maping irq numbers to values for the irq parameter register */
static int irqvals[16] = {
0, 0, 0, 0x01, 0x02, 0x04, 0, 0x08, 0, 0, 0x10, 0x20, 0x40, 0, 0, 0x80
};
/* mask of valid IRQs */
#define WL_IRQS (IRQ3|IRQ4|IRQ5|IRQ7|IRQ10|IRQ11|IRQ12|IRQ15)
/*
* wlprobe:
*
* This function "probes" or checks for the WaveLAN board on the bus to
* see if it is there. As far as I can tell, the best break between this
* routine and the attach code is to simply determine whether the board
* is configured in properly. Currently my approach to this is to write
* and read a word from the SRAM on the board being probed. If the word
* comes back properly then we assume the board is there. The config
* code expects to see a successful return from the probe routine before
* attach will be called.
*
* input : address device is mapped to, and unit # being checked
* output : a '1' is returned if the board exists, and a 0 otherwise
*
*/
static int
wlprobe(struct isa_device *id)
{
struct wl_softc *sc = &wl_softc[id->id_unit];
register short base = id->id_iobase;
int unit = id->id_unit;
char *str = "wl%d: board out of range [0..%d]\n";
u_char inbuf[100];
unsigned long oldpri;
int irq;
/* TBD. not true.
* regular CMD() will not work, since no softc yet
*/
#define PCMD(base, hacr) outw((base), (hacr))
oldpri = splimp();
PCMD(base, HACR_RESET); /* reset the board */
DELAY(DELAYCONST); /* >> 4 clocks at 6MHz */
PCMD(base, HACR_RESET); /* reset the board */
DELAY(DELAYCONST); /* >> 4 clocks at 6MHz */
splx(oldpri);
/* clear reset command and set PIO#1 in autoincrement mode */
PCMD(base, HACR_DEFAULT);
PCMD(base, HACR_DEFAULT);
outw(PIOR1(base), 0); /* go to beginning of RAM */
outsw(PIOP1(base), str, strlen(str)/2+1); /* write string */
outw(PIOR1(base), 0); /* rewind */
insw(PIOP1(base), inbuf, strlen(str)/2+1); /* read result */
if (bcmp(str, inbuf, strlen(str)))
return(0);
/* read the PSA from the board into temporary storage */
wlgetpsa(base, inbuf);
/* We read the IRQ value from the PSA on the board. */
for (irq = 15; irq >= 0; irq--)
if (irqvals[irq] == inbuf[WLPSA_IRQNO])
break;
if ((irq == 0) || (irqvals[irq] == 0)){
printf("wl%d: PSA corrupt (invalid IRQ value)\n", id->id_unit);
id->id_irq = 0; /* no interrupt */
} else {
/*
* If the IRQ requested by the PSA is already claimed by another
* device, the board won't work, but the user can still access the
* driver to change the IRQ.
*/
id->id_irq = (1<<irq); /* use IRQ from PSA */
}
return(16);
}
/*
* wlattach:
*
* This function attaches a WaveLAN board to the "system". The rest of
* runtime structures are initialized here (this routine is called after
* a successful probe of the board). Once the ethernet address is read
* and stored, the board's ifnet structure is attached and readied.
*
* input : isa_dev structure setup in autoconfig
* output : board structs and ifnet is setup
*
*/
static int
wlattach(struct isa_device *id)
{
struct wl_softc *sc = (struct wl_softc *) &wl_softc[id->id_unit];
register short base = id->id_iobase;
int i,j;
u_char unit = id->id_unit;
register struct ifnet *ifp = &sc->wl_if;
#ifdef WLDEBUG
printf("wlattach: base %x, unit %d\n", base, unit);
#endif
sc->base = base;
sc->unit = unit;
sc->flags = 0;
sc->mode = 0;
sc->hacr = HACR_RESET;
CMD(unit); /* reset the board */
DELAY(DELAYCONST); /* >> 4 clocks at 6MHz */
/* clear reset command and set PIO#2 in parameter access mode */
sc->hacr = (HACR_DEFAULT & ~HACR_16BITS);
CMD(unit);
/* Read the PSA from the board for our later reference */
wlgetpsa(base, sc->psa);
/* fetch NWID */
sc->nwid[0] = sc->psa[WLPSA_NWID];
sc->nwid[1] = sc->psa[WLPSA_NWID+1];
/* fetch MAC address - decide which one first */
if (sc->psa[WLPSA_MACSEL] & 1) {
j = WLPSA_LOCALMAC;
} else {
j = WLPSA_UNIMAC;
}
for(i=0; i < WAVELAN_ADDR_SIZE; ++i) {
sc->wl_addr[i] = sc->psa[j + i];
}
/* enter normal 16 bit mode operation */
sc->hacr = HACR_DEFAULT;
CMD(unit);
wlinitmmc(unit);
outw(PIOR1(base), OFFSET_SCB + 8); /* address of scb_crcerrs */
outw(PIOP1(base), 0); /* clear scb_crcerrs */
outw(PIOP1(base), 0); /* clear scb_alnerrs */
outw(PIOP1(base), 0); /* clear scb_rscerrs */
outw(PIOP1(base), 0); /* clear scb_ovrnerrs */
bzero(ifp, sizeof(ifp));
ifp->if_softc = sc;
ifp->if_unit = id->id_unit;
ifp->if_mtu = WAVELAN_MTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
#ifdef WLDEBUG
ifp->if_flags |= IFF_DEBUG;
#endif
#if MULTICAST
ifp->if_flags |= IFF_MULTICAST;
#endif MULTICAST
ifp->if_name = "wl";
ifp->if_unit = unit;
ifp->if_init = wlinit;
ifp->if_output = ether_output;
ifp->if_start = wlstart;
ifp->if_ioctl = wlioctl;
ifp->if_timer = 0; /* paranoia */
/* no entries
ifp->if_watchdog
ifp->if_done
ifp->if_reset
*/
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
bcopy(&sc->wl_addr[0], sc->wl_ac.ac_enaddr, WAVELAN_ADDR_SIZE);
printf("%s%d: address %6D, NWID 0x%02x%02x\n", ifp->if_name, ifp->if_unit,
sc->wl_ac.ac_enaddr, ":", sc->nwid[0], sc->nwid[1]);
if (bootverbose)
wldump(unit);
return(1);
}
/*
* Print out interesting information about the 82596.
*/
static void
wldump(int unit)
{
register struct wl_softc *sp = WLSOFTC(unit);
int base = sp->base;
int i;
printf("hasr %04x\n", inw(HASR(base)));
printf("scb at %04x:\n ", OFFSET_SCB);
outw(PIOR1(base), OFFSET_SCB);
for(i = 0; i < 8; i++)
printf("%04x ", inw(PIOP1(base)));
printf("\n");
printf("cu at %04x:\n ", OFFSET_CU);
outw(PIOR1(base), OFFSET_CU);
for(i = 0; i < 8; i++)
printf("%04x ", inw(PIOP1(base)));
printf("\n");
printf("tbd at %04x:\n ", OFFSET_TBD);
outw(PIOR1(base), OFFSET_TBD);
for(i = 0; i < 4; i++)
printf("%04x ", inw(PIOP1(base)));
printf("\n");
}
/* Initialize the Modem Management Controller */
static void
wlinitmmc(int unit)
{
register struct wl_softc *sp = WLSOFTC(unit);
int base = sp->base;
int configured;
int mode = sp->mode;
/* enter 8 bit operation */
sp->hacr = (HACR_DEFAULT & ~HACR_16BITS);
CMD(unit);
configured = sp->psa[WLPSA_CONFIGURED] & 1;
/*
* Set default modem control parameters. Taken from NCR document
* 407-0024326 Rev. A
*/
MMC_WRITE(MMC_JABBER_ENABLE, 0x01);
MMC_WRITE(MMC_ANTEN_SEL, 0x02);
MMC_WRITE(MMC_IFS, 0x20);
MMC_WRITE(MMC_MOD_DELAY, 0x04);
MMC_WRITE(MMC_JAM_TIME, 0x38);
MMC_WRITE(MMC_DECAY_PRM, 0x00); /* obsolete ? */
MMC_WRITE(MMC_DECAY_UPDAT_PRM, 0x00);
if (!configured) {
MMC_WRITE(MMC_LOOPT_SEL, 0x00);
if (sp->psa[WLPSA_COMPATNO] & 1) {
MMC_WRITE(MMC_THR_PRE_SET, 0x01); /* 0x04 for AT and 0x01 for MCA */
} else {
MMC_WRITE(MMC_THR_PRE_SET, 0x04); /* 0x04 for AT and 0x01 for MCA */
}
MMC_WRITE(MMC_QUALITY_THR, 0x03);
} else {
/* use configuration defaults from parameter storage area */
if (sp->psa[WLPSA_NWIDENABLE] & 1) {
if (mode & MOD_PROM) {
MMC_WRITE(MMC_LOOPT_SEL, 0x40);
} else {
MMC_WRITE(MMC_LOOPT_SEL, 0x00);
}
} else {
MMC_WRITE(MMC_LOOPT_SEL, 0x40); /* disable network id check */
}
MMC_WRITE(MMC_THR_PRE_SET, sp->psa[WLPSA_THRESH]);
MMC_WRITE(MMC_QUALITY_THR, sp->psa[WLPSA_QUALTHRESH]);
}
MMC_WRITE(MMC_FREEZE, 0x00);
MMC_WRITE(MMC_ENCR_ENABLE, 0x00);
MMC_WRITE(MMC_NETW_ID_L,sp->nwid[1]); /* set NWID */
MMC_WRITE(MMC_NETW_ID_H,sp->nwid[0]);
/* enter normal 16 bit mode operation */
sp->hacr = HACR_DEFAULT;
CMD(unit);
CMD(unit); /* virtualpc1 needs this! */
}
/*
* wlinit:
*
* Another routine that interfaces the "if" layer to this driver.
* Simply resets the structures that are used by "upper layers".
* As well as calling wlhwrst that does reset the WaveLAN board.
*
* input : softc pointer for this interface
* output : structures (if structs) and board are reset
*
*/
static void
wlinit(void *xsc)
{
register struct wl_softc *sc = xsc;
struct ifnet *ifp = &sc->wl_if;
int stat;
u_long oldpri;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlinit()\n",sc->unit);
#endif
#if __FreeBSD__ >= 3
if (ifp->if_addrhead.tqh_first == (struct ifaddr *)0) {
return;
}
#else
if (ifp->if_addrlist == (struct ifaddr *)0) {
return;
}
#endif
oldpri = splimp();
if ((stat = wlhwrst(sc->unit)) == TRUE) {
sc->wl_if.if_flags |= IFF_RUNNING; /* same as DSF_RUNNING */
/*
* OACTIVE is used by upper-level routines
* and must be set
*/
sc->wl_if.if_flags &= ~IFF_OACTIVE; /* same as tbusy below */
sc->flags |= DSF_RUNNING;
sc->tbusy = 0;
untimeout((timeout_func_t)wlwatchdog, sc);
wlstart(ifp);
} else {
printf("wl%d init(): trouble resetting board.\n", sc->unit);
}
splx(oldpri);
}
/*
* wlhwrst:
*
* This routine resets the WaveLAN board that corresponds to the
* board number passed in.
*
* input : board number to do a hardware reset
* output : board is reset
*
*/
static int
wlhwrst(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
int i;
short base = sc->base;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlhwrst()\n",unit);
#endif
sc->hacr = HACR_RESET;
CMD(unit); /* reset the board */
/* clear reset command and set PIO#1 in autoincrement mode */
sc->hacr = HACR_DEFAULT;
CMD(unit);
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
wlmmcstat(unit); /* Display MMC registers */
#endif WLDEBUG
wlbldcu(unit); /* set up command unit structures */
if (wldiag(unit) == 0)
return(0);
if (wlconfig(unit) == 0)
return(0);
/*
* insert code for loopback test here
*/
wlrustrt(unit); /* start receive unit */
/* enable interrupts */
sc->hacr = (HACR_DEFAULT | HACR_INTRON);
CMD(unit);
return(1);
}
/*
* wlbldcu:
*
* This function builds up the command unit structures. It inits
* the scp, iscp, scb, cb, tbd, and tbuf.
*
*/
static void
wlbldcu(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
scp_t scp;
iscp_t iscp;
scb_t scb;
ac_t cb;
tbd_t tbd;
int i;
bzero(&scp, sizeof(scp));
scp.scp_sysbus = 0;
scp.scp_iscp = OFFSET_ISCP;
scp.scp_iscp_base = 0;
outw(PIOR1(base), OFFSET_SCP);
outsw(PIOP1(base), &scp, sizeof(scp_t)/2);
bzero(&iscp, sizeof(iscp));
iscp.iscp_busy = 1;
iscp.iscp_scb_offset = OFFSET_SCB;
iscp.iscp_scb = 0;
iscp.iscp_scb_base = 0;
outw(PIOR1(base), OFFSET_ISCP);
outsw(PIOP1(base), &iscp, sizeof(iscp_t)/2);
scb.scb_status = 0;
scb.scb_command = SCB_RESET;
scb.scb_cbl_offset = OFFSET_CU;
scb.scb_rfa_offset = OFFSET_RU;
scb.scb_crcerrs = 0;
scb.scb_alnerrs = 0;
scb.scb_rscerrs = 0;
scb.scb_ovrnerrs = 0;
outw(PIOR1(base), OFFSET_SCB);
outsw(PIOP1(base), &scb, sizeof(scb_t)/2);
SET_CHAN_ATTN(unit);
outw(PIOR0(base), OFFSET_ISCP + 0); /* address of iscp_busy */
for (i = 1000000; inw(PIOP0(base)) && (i-- > 0); );
if (i <= 0) printf("wl%d bldcu(): iscp_busy timeout.\n", unit);
outw(PIOR0(base), OFFSET_SCB + 0); /* address of scb_status */
for (i = STATUS_TRIES; i-- > 0; ) {
if (inw(PIOP0(base)) == (SCB_SW_CX|SCB_SW_CNA))
break;
}
if (i <= 0)
printf("wl%d bldcu(): not ready after reset.\n", unit);
wlack(unit);
cb.ac_status = 0;
cb.ac_command = AC_CW_EL; /* NOP */
cb.ac_link_offset = OFFSET_CU;
outw(PIOR1(base), OFFSET_CU);
outsw(PIOP1(base), &cb, 6/2);
tbd.act_count = 0;
tbd.next_tbd_offset = I82586NULL;
tbd.buffer_addr = 0;
tbd.buffer_base = 0;
outw(PIOR1(base), OFFSET_TBD);
outsw(PIOP1(base), &tbd, sizeof(tbd_t)/2);
}
/*
* wlstart:
*
* send a packet
*
* input : board number
* output : stuff sent to board if any there
*
*/
static void
wlstart(struct ifnet *ifp)
{
int unit = ifp->if_unit;
struct mbuf *m;
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
int scb_status, cu_status, scb_command;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlstart()\n",unit);
#endif
outw(PIOR1(base), OFFSET_CU);
cu_status = inw(PIOP1(base));
outw(PIOR0(base),OFFSET_SCB + 0); /* scb_status */
scb_status = inw(PIOP0(base));
outw(PIOR0(base), OFFSET_SCB + 2);
scb_command = inw(PIOP0(base));
/*
* don't need OACTIVE check as tbusy here checks to see
* if we are already busy
*/
if (sc->tbusy) {
if((scb_status & 0x0700) == SCB_CUS_IDLE &&
(cu_status & AC_SW_B) == 0){
sc->tbusy = 0;
untimeout((timeout_func_t)wlwatchdog, sc);
sc->wl_ac.ac_if.if_flags &= ~IFF_OACTIVE;
/*
* This is probably just a race. The xmt'r is just
* became idle but WE have masked interrupts so ...
*/
#ifdef WLDEBUG
printf("wl%d: CU idle, scb %04x %04x cu %04x\n",
unit, scb_status, scb_command, cu_status);
#endif
if (xmt_watch) printf("!!");
} else {
return; /* genuinely still busy */
}
} else if((scb_status & 0x0700) == SCB_CUS_ACTV ||
(cu_status & AC_SW_B)){
#ifdef WLDEBUG
printf("wl%d: CU unexpectedly busy; scb %04x cu %04x\n",
unit, scb_status, cu_status);
#endif
if (xmt_watch) printf("wl%d: busy?!",unit);
return; /* hey, why are we busy? */
}
/* get ourselves some data */
ifp = &(sc->wl_if);
IF_DEQUEUE(&ifp->if_snd, m);
if (m != (struct mbuf *)0) {
#if NBPFILTER > 0
/* let BPF see it before we commit it */
if (ifp->if_bpf) {
bpf_mtap(ifp, m);
}
#endif
sc->tbusy++;
/* set the watchdog timer so that if the board
* fails to interrupt we will restart
*/
/* try 10 ticks, not very long */
timeout((timeout_func_t)wlwatchdog, sc, 10);
sc->wl_ac.ac_if.if_flags |= IFF_OACTIVE;
sc->wl_if.if_opackets++;
wlxmt(unit, m);
} else {
sc->wl_ac.ac_if.if_flags &= ~IFF_OACTIVE;
}
return;
}
/*
* wlread:
*
* This routine does the actual copy of data (including ethernet header
* structure) from the WaveLAN to an mbuf chain that will be passed up
* to the "if" (network interface) layer. NOTE: we currently
* don't handle trailer protocols, so if that is needed, it will
* (at least in part) be added here. For simplicities sake, this
* routine copies the receive buffers from the board into a local (stack)
* buffer until the frame has been copied from the board. Once in
* the local buffer, the contents are copied to an mbuf chain that
* is then enqueued onto the appropriate "if" queue.
*
* input : board number, and an frame descriptor address
* output : the packet is put into an mbuf chain, and passed up
* assumes : if any errors occur, packet is "dropped on the floor"
*
*/
static int
wlread(unit, fd_p)
int unit;
u_short fd_p;
{
register struct wl_softc *sc = WLSOFTC(unit);
register struct ifnet *ifp = &sc->wl_if;
short base = sc->base;
fd_t fd;
struct ether_header eh;
struct mbuf *m, *tm;
rbd_t rbd;
u_char *mb_p;
u_short mlen, len, clen;
u_short bytes_in_msg, bytes_in_mbuf, bytes;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlread()\n",unit);
#endif
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
printf("wl%d read(): board is not running.\n", ifp->if_unit);
sc->hacr &= ~HACR_INTRON;
CMD(unit); /* turn off interrupts */
}
/* read ether_header info out of device memory. doesn't
* go into mbuf. goes directly into eh structure
*/
len = sizeof(struct ether_header); /* 14 bytes */
outw(PIOR1(base), fd_p);
insw(PIOP1(base), &fd, (sizeof(fd_t) - len)/2);
insw(PIOP1(base), &eh, (len-2)/2);
eh.ether_type = ntohs(inw(PIOP1(base)));
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG) {
printf("wlread: rcv packet, type is %x\n", eh.ether_type);
}
#endif
/*
* WARNING. above is done now in ether_input, above may be
* useful for debug. jrb
*/
eh.ether_type = htons(eh.ether_type);
if (fd.rbd_offset == I82586NULL) {
printf("wl%d read(): Invalid buffer\n", unit);
if (wlhwrst(unit) != TRUE) {
printf("wl%d read(): hwrst trouble.\n", unit);
}
return 0;
}
outw(PIOR1(base), fd.rbd_offset);
insw(PIOP1(base), &rbd, sizeof(rbd_t)/2);
bytes_in_msg = rbd.status & RBD_SW_COUNT;
MGETHDR(m, M_DONTWAIT, MT_DATA);
tm = m;
if (m == (struct mbuf *)0) {
/*
* not only do we want to return, we need to drop the packet on
* the floor to clear the interrupt.
*
*/
if (wlhwrst(unit) != TRUE) {
sc->hacr &= ~HACR_INTRON;
CMD(unit); /* turn off interrupts */
printf("wl%d read(): hwrst trouble.\n", unit);
}
return 0;
}
m->m_next = (struct mbuf *) 0;
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = 0; /* don't know this yet */
m->m_len = MHLEN;
if (bytes_in_msg >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if (m->m_flags & M_EXT)
m->m_len = MCLBYTES;
}
mlen = 0;
clen = mlen;
bytes_in_mbuf = m->m_len;
mb_p = mtod(tm, u_char *);
bytes = min(bytes_in_mbuf, bytes_in_msg);
for (;;) {
if (bytes & 1) {
len = bytes + 1;
} else {
len = bytes;
}
outw(PIOR1(base), rbd.buffer_addr);
insw(PIOP1(base), mb_p, len/2);
clen += bytes;
mlen += bytes;
if (!(bytes_in_mbuf -= bytes)) {
MGET(tm->m_next, M_DONTWAIT, MT_DATA);
tm = tm->m_next;
if (tm == (struct mbuf *)0) {
m_freem(m);
printf("wl%d read(): No mbuf nth\n", unit);
if (wlhwrst(unit) != TRUE) {
sc->hacr &= ~HACR_INTRON;
CMD(unit); /* turn off interrupts */
printf("wl%d read(): hwrst trouble.\n", unit);
}
return 0;
}
mlen = 0;
tm->m_len = MLEN;
bytes_in_mbuf = MLEN;
mb_p = mtod(tm, u_char *);
} else {
mb_p += bytes;
}
if (!(bytes_in_msg -= bytes)) {
if (rbd.status & RBD_SW_EOF ||
rbd.next_rbd_offset == I82586NULL) {
tm->m_len = mlen;
break;
} else {
outw(PIOR1(base), rbd.next_rbd_offset);
insw(PIOP1(base), &rbd, sizeof(rbd_t)/2);
bytes_in_msg = rbd.status & RBD_SW_COUNT;
}
} else {
rbd.buffer_addr += bytes;
}
bytes = min(bytes_in_mbuf, bytes_in_msg);
}
m->m_pkthdr.len = clen;
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface. If so, hand off
* the raw packet to bpf.
*/
if (ifp->if_bpf) {
/* bpf assumes header is in mbufs. It isn't. We can
* fool it without allocating memory as follows.
* Trick borrowed from if_ie.c
*/
struct mbuf m0;
m0.m_len = sizeof eh;
m0.m_data = (caddr_t) &eh;
m0.m_next = m;
bpf_mtap(ifp, &m0);
/*
* Note that the interface cannot be in promiscuous mode if
* there are no BPF listeners. And if we are in promiscuous
* mode, we have to check if this packet is really ours.
*
* logic: if promiscuous mode AND not multicast/bcast AND
* not to us, throw away
*/
if ((sc->wl_ac.ac_if.if_flags & IFF_PROMISC) &&
(eh.ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */
bcmp(eh.ether_dhost, sc->wl_ac.ac_enaddr,
sizeof(eh.ether_dhost)) != 0 ) {
m_freem(m);
return 1;
}
}
#endif
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: wlrecv %d bytes\n", unit, clen);
#endif
/*
* received packet is now in a chain of mbuf's. next step is
* to pass the packet upwards.
*
*/
ether_input(&sc->wl_if, &eh, m);
return 1;
}
/*
* wlioctl:
*
* This routine processes an ioctl request from the "if" layer
* above.
*
* input : pointer the appropriate "if" struct, command, and data
* output : based on command appropriate action is taken on the
* WaveLAN board(s) or related structures
* return : error is returned containing exit conditions
*
*/
static int
wlioctl(struct ifnet *ifp, int cmd, caddr_t data)
{
register struct ifaddr *ifa = (struct ifaddr *)data;
register struct ifreq *ifr = (struct ifreq *)data;
int unit = ifp->if_unit;
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
short mode = 0;
int opri, error = 0;
u_short tmp;
struct proc *p = curproc; /* XXX */
int irq, irqval, i, isroot;
caddr_t up;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlioctl()\n",unit);
#endif
opri = splimp();
switch (cmd) {
case SIOCSIFADDR:
/* Set own IP address and enable interface */
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
wlinit(sc);
arp_ifinit((struct arpcom *)ifp, ifa);
break;
#endif
#ifdef NS
case AF_NS:
{
register struct ns_addr *ina =
&(IA_SNS(ifa)->sns_addr);
if (ns_nullhost(*ina))
ina->x_host = *(union ns_host *)(ds->wl_addr);
else
wlsetaddr(ina->x_host.c_host, unit);
wlinit(sc);
break;
}
#endif
default:
wlinit(sc);
break;
}
break;
case SIOCSIFFLAGS:
/* TBD. further checkout. jrb
*/
if (ifp->if_flags & IFF_ALLMULTI)
mode |= MOD_ENAL;
if (ifp->if_flags & IFF_PROMISC)
mode |= MOD_PROM;
if(ifp->if_flags & IFF_LINK0)
mode |= MOD_PROM;
/*
* force a complete reset if the recieve multicast/
* promiscuous mode changes so that these take
* effect immediately.
*
*/
if (sc->mode != mode) {
sc->mode = mode;
if (sc->flags & DSF_RUNNING) {
sc->flags &= ~DSF_RUNNING;
wlinit(sc);
}
}
/* if interface is marked DOWN and still running then
* stop it.
*/
if ((ifp->if_flags & IFF_UP) == 0 && sc->flags & DSF_RUNNING) {
printf("wl%d ioctl(): board is not running\n", unit);
sc->flags &= ~DSF_RUNNING;
sc->hacr &= ~HACR_INTRON;
CMD(unit); /* turn off interrupts */
}
/* else if interface is UP and RUNNING, start it
*/
else if (ifp->if_flags & IFF_UP && (sc->flags & DSF_RUNNING) == 0) {
wlinit(sc);
}
/* if WLDEBUG set on interface, then printf rf-modem regs
*/
if(ifp->if_flags & IFF_DEBUG)
wlmmcstat(unit);
break;
#if MULTICAST
case SIOCADDMULTI:
case SIOCDELMULTI:
#if __FreeBSD__ >= 3
if(sc->flags & DSF_RUNNING) {
sc->flags &= ~DSF_RUNNING;
wlinit(sc);
}
#else
error = (cmd == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->wl_ac) :
ether_delmulti(ifr, &sc->wl_ac);
if (error == ENETRESET) {
if(sc->flags & DSF_RUNNING) {
sc->flags &= ~DSF_RUNNING;
wlinit(sc);
}
error = 0;
}
#endif
break;
#endif MULTICAST
/* copy the PSA out to the caller */
case SIOCGWLPSA:
/* pointer to buffer in user space */
up = (void *)ifr->ifr_data;
/* work out if they're root */
isroot = (suser(p->p_ucred, &p->p_acflag) == 0);
for (i = 0; i < 0x40; i++) {
/* don't hand the DES key out to non-root users */
if ((i > WLPSA_DESKEY) && (i < (WLPSA_DESKEY + 8)) && !isroot)
continue;
if (subyte((up + i), sc->psa[i]))
return(EFAULT);
}
break;
/* copy the PSA in from the caller; we only copy _some_ values */
case SIOCSWLPSA:
/* root only */
if ((error = suser(p->p_ucred, &p->p_acflag)))
break;
error = EINVAL; /* assume the worst */
/* pointer to buffer in user space containing data */
up = (void *)ifr->ifr_data;
/* check validity of input range */
for (i = 0; i < 0x40; i++)
if (fubyte(up + i) < 0)
return(EFAULT);
/* check IRQ value */
irqval = fubyte(up+WLPSA_IRQNO);
for (irq = 15; irq >= 0; irq--)
if(irqvals[irq] == irqval)
break;
if (irq == 0) /* oops */
break;
/* new IRQ */
sc->psa[WLPSA_IRQNO] = irqval;
/* local MAC */
for (i = 0; i < 6; i++)
sc->psa[WLPSA_LOCALMAC+i] = fubyte(up+WLPSA_LOCALMAC+i);
/* MAC select */
sc->psa[WLPSA_MACSEL] = fubyte(up+WLPSA_MACSEL);
/* default nwid */
sc->psa[WLPSA_NWID] = fubyte(up+WLPSA_NWID);
sc->psa[WLPSA_NWID+1] = fubyte(up+WLPSA_NWID+1);
error = 0;
wlsetpsa(unit); /* update the PSA */
break;
/* get the current NWID out of the sc since we stored it there */
case SIOCGWLCNWID:
ifr->ifr_data = (caddr_t) (sc->nwid[0] << 8 | sc->nwid[1]);
break;
/*
* change the nwid dynamically. This
* ONLY changes the radio modem and does not
* change the PSA.
*
* 2 steps:
* 1. save in softc "soft registers"
* 2. save in radio modem (MMC)
*/
case SIOCSWLCNWID:
/* root only */
if ((error = suser(p->p_ucred, &p->p_acflag)))
break;
if (!(ifp->if_flags & IFF_UP)) {
error = EIO; /* only allowed while up */
} else {
/*
* soft c nwid shadows radio modem setting
*/
sc->nwid[0] = (int)ifr->ifr_data >> 8;
sc->nwid[1] = (int)ifr->ifr_data & 0xff;
MMC_WRITE(MMC_NETW_ID_L,sc->nwid[1]);
MMC_WRITE(MMC_NETW_ID_H,sc->nwid[0]);
}
break;
default:
error = EINVAL;
}
splx(opri);
return (error);
}
/*
* wlwatchdog():
*
* Called if the timer set in wlstart expires before an interrupt is received
* from the wavelan. It seems to lose interrupts sometimes.
* The watchdog routine gets called if the transmitter failed to interrupt
*
* input : which board is timing out
* output : board reset
*
*/
static void
wlwatchdog(struct wl_softc *sc)
{
int unit = sc->unit;
log(LOG_ERR, "wl%d: wavelan device timeout on xmit\n", unit);
sc->wl_ac.ac_if.if_oerrors++;
wlinit(sc);
}
/*
* wlintr:
*
* This function is the interrupt handler for the WaveLAN
* board. This routine will be called whenever either a packet
* is received, or a packet has successfully been transfered and
* the unit is ready to transmit another packet.
*
* input : board number that interrupted
* output : either a packet is received, or a packet is transfered
*
*/
void
wlintr(unit)
int unit;
{
register struct wl_softc *sc = &wl_softc[unit];
scb_t scb;
ac_t cb;
short base = sc->base;
int next, x, opri;
int i, ac_status;
u_short int_type, int_type1;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: wlintr() called\n",unit);
#endif
if((int_type = inw(HASR(base))) & HASR_MMC_INTR) {
/* handle interrupt from the modem management controler */
/* This will clear the interrupt condition */
(void) wlmmcread(base,MMC_DCE_STATUS); /* ignored for now */
}
if(!(int_type & HASR_INTR)){ /* return if no interrupt from 82586 */
/* commented out. jrb. it happens when reinit occurs
printf("wlintr: int_type %x, dump follows\n", int_type);
wldump(unit);
*/
return;
}
if (gathersnr)
getsnr(unit);
for(;;) {
outw(PIOR0(base), OFFSET_SCB + 0); /* get scb status */
int_type = (inw(PIOP0(base)) & SCB_SW_INT);
if (int_type == 0) /* no interrupts left */
break;
int_type1 = wlack(unit); /* acknowledge interrupt(s) */
/* make sure no bits disappeared (others may appear) */
if ((int_type & int_type1) != int_type)
printf("wlack() int bits disappeared : %04x != int_type %04x\n",
int_type1, int_type);
int_type = int_type1; /* go with the new status */
/*
* incoming packet
*/
if (int_type & SCB_SW_FR) {
sc->wl_if.if_ipackets++;
wlrcv(unit);
}
/*
* receiver not ready
*/
if (int_type & SCB_SW_RNR) {
sc->wl_if.if_ierrors++;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d intr(): receiver overrun! begin_fd = %x\n",
unit, sc->begin_fd);
#endif
wlrustrt(unit);
}
/*
* CU not ready
*/
if (int_type & SCB_SW_CNA) {
/*
* At present, we don't care about CNA's. We
* believe they are a side effect of XMT.
*/
}
if (int_type & SCB_SW_CX) {
/*
* At present, we only request Interrupt for
* XMT.
*/
outw(PIOR1(base), OFFSET_CU); /* get command status */
ac_status = inw(PIOP1(base));
if (xmt_watch) { /* report some anomalies */
if (sc->tbusy == 0) {
printf("wl%d: xmt intr but not busy, CU %04x\n",
unit, ac_status);
}
if (ac_status == 0) {
printf("wl%d: xmt intr but ac_status == 0\n", unit);
}
if (ac_status & AC_SW_A) {
printf("wl%d: xmt aborted\n",unit);
}
#ifdef notdef
if (ac_status & TC_CARRIER) {
printf("wl%d: no carrier\n", unit);
}
#endif notdef
if (ac_status & TC_CLS) {
printf("wl%d: no CTS\n", unit);
}
if (ac_status & TC_DMA) {
printf("wl%d: DMA underrun\n", unit);
}
if (ac_status & TC_DEFER) {
printf("wl%d: xmt deferred\n",unit);
}
if (ac_status & TC_SQE) {
printf("wl%d: heart beat\n", unit);
}
if (ac_status & TC_COLLISION) {
printf("wl%d: too many collisions\n", unit);
}
}
/* if the transmit actually failed, or returned some status */
if ((!(ac_status & AC_SW_OK)) || (ac_status & 0xfff)) {
if (ac_status & (TC_COLLISION | TC_CLS | TC_DMA)) {
sc->wl_if.if_oerrors++;
}
/* count collisions */
sc->wl_if.if_collisions += (ac_status & 0xf);
/* if TC_COLLISION set and collision count zero, 16 collisions */
if ((ac_status & 0x20) == 0x20) {
sc->wl_if.if_collisions += 0x10;
}
}
sc->tbusy = 0;
untimeout((timeout_func_t)wlwatchdog, sc);
sc->wl_ac.ac_if.if_flags &= ~IFF_OACTIVE;
wlstart(&(sc->wl_if));
}
}
return;
}
/*
* wlrcv:
*
* This routine is called by the interrupt handler to initiate a
* packet transfer from the board to the "if" layer above this
* driver. This routine checks if a buffer has been successfully
* received by the WaveLAN. If so, the routine wlread is called
* to do the actual transfer of the board data (including the
* ethernet header) into a packet (consisting of an mbuf chain).
*
* input : number of the board to check
* output : if a packet is available, it is "sent up"
*
*/
static void
wlrcv(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
u_short fd_p, status, offset, link_offset;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlrcv()\n",unit);
#endif
for (fd_p = sc->begin_fd; fd_p != I82586NULL; fd_p = sc->begin_fd) {
outw(PIOR0(base), fd_p + 0); /* address of status */
status = inw(PIOP0(base));
outw(PIOR1(base), fd_p + 4); /* address of link_offset */
link_offset = inw(PIOP1(base));
offset = inw(PIOP1(base)); /* rbd_offset */
if (status == 0xffff || offset == 0xffff /*I82586NULL*/) {
if (wlhwrst(unit) != TRUE)
printf("wl%d rcv(): hwrst ffff trouble.\n", unit);
return;
} else if (status & AC_SW_C) {
if (status == (RFD_DONE|RFD_RSC)) {
/* lost one */
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d RCV: RSC %x\n", unit, status);
#endif
sc->wl_if.if_ierrors++;
} else if (!(status & RFD_OK)) {
printf("wl%d RCV: !OK %x\n", unit, status);
sc->wl_if.if_ierrors++;
} else if (status & 0xfff) { /* can't happen */
printf("wl%d RCV: ERRs %x\n", unit, status);
sc->wl_if.if_ierrors++;
} else if (!wlread(unit, fd_p))
return;
if (!wlrequeue(unit, fd_p)) {
/* abort on chain error */
if (wlhwrst(unit) != TRUE)
printf("wl%d rcv(): hwrst trouble.\n", unit);
return;
}
sc->begin_fd = link_offset;
} else {
break;
}
}
return;
}
/*
* wlrequeue:
*
* This routine puts rbd's used in the last receive back onto the
* free list for the next receive.
*
*/
static int
wlrequeue(int unit, u_short fd_p)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
fd_t fd;
u_short l_rbdp, f_rbdp, rbd_offset;
outw(PIOR0(base), fd_p + 6);
rbd_offset = inw(PIOP0(base));
if ((f_rbdp = rbd_offset) != I82586NULL) {
l_rbdp = f_rbdp;
for(;;) {
outw(PIOR0(base), l_rbdp + 0); /* address of status */
if(inw(PIOP0(base)) & RBD_SW_EOF)
break;
outw(PIOP0(base), 0);
outw(PIOR0(base), l_rbdp + 2); /* next_rbd_offset */
if((l_rbdp = inw(PIOP0(base))) == I82586NULL)
break;
}
outw(PIOP0(base), 0);
outw(PIOR0(base), l_rbdp + 2); /* next_rbd_offset */
outw(PIOP0(base), I82586NULL);
outw(PIOR0(base), l_rbdp + 8); /* address of size */
outw(PIOP0(base), inw(PIOP0(base)) | AC_CW_EL);
outw(PIOR0(base), sc->end_rbd + 2);
outw(PIOP0(base), f_rbdp); /* end_rbd->next_rbd_offset */
outw(PIOR0(base), sc->end_rbd + 8); /* size */
outw(PIOP0(base), inw(PIOP0(base)) & ~AC_CW_EL);
sc->end_rbd = l_rbdp;
}
fd.status = 0;
fd.command = AC_CW_EL;
fd.link_offset = I82586NULL;
fd.rbd_offset = I82586NULL;
outw(PIOR1(base), fd_p);
outsw(PIOP1(base), &fd, 8/2);
outw(PIOR1(base), sc->end_fd + 2); /* addr of command */
outw(PIOP1(base), 0); /* command = 0 */
outw(PIOP1(base), fd_p); /* end_fd->link_offset = fd_p */
sc->end_fd = fd_p;
return 1;
}
#ifdef WLDEBUG
static int xmt_debug = 0;
#endif WLDEBUG
/*
* wlxmt:
*
* This routine fills in the appropriate registers and memory
* locations on the WaveLAN board and starts the board off on
* the transmit.
*
* input : board number of interest, and a pointer to the mbuf
* output : board memory and registers are set for xfer and attention
*
*/
static void
wlxmt(int unit, struct mbuf *m)
{
register struct wl_softc *sc = WLSOFTC(unit);
register u_short xmtdata_p = OFFSET_TBUF;
register u_short xmtshort_p;
struct mbuf *tm_p = m;
register struct ether_header *eh_p = mtod(m, struct ether_header *);
u_char *mb_p = mtod(m, u_char *) + sizeof(struct ether_header);
u_short count = m->m_len - sizeof(struct ether_header);
ac_t cb;
u_short tbd_p = OFFSET_TBD;
u_short len, clen = 0;
short base = sc->base;
int spin;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlxmt()\n",unit);
#endif
cb.ac_status = 0;
cb.ac_command = (AC_CW_EL|AC_TRANSMIT|AC_CW_I);
cb.ac_link_offset = I82586NULL;
outw(PIOR1(base), OFFSET_CU);
outsw(PIOP1(base), &cb, 6/2);
outw(PIOP1(base), OFFSET_TBD); /* cb.cmd.transmit.tbd_offset */
outsw(PIOP1(base), eh_p->ether_dhost, WAVELAN_ADDR_SIZE/2);
outw(PIOP1(base), eh_p->ether_type);
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG) {
if (xmt_debug) {
printf("XMT mbuf: L%d @%x ", count, mb_p);
printf("ether type %x\n", eh_p->ether_type);
}
}
#endif WLDEBUG
outw(PIOR0(base), OFFSET_TBD);
outw(PIOP0(base), 0); /* act_count */
outw(PIOR1(base), OFFSET_TBD + 4);
outw(PIOP1(base), xmtdata_p); /* buffer_addr */
outw(PIOP1(base), 0); /* buffer_base */
for (;;) {
if (count) {
if (clen + count > WAVELAN_MTU)
break;
if (count & 1)
len = count + 1;
else
len = count;
outw(PIOR1(base), xmtdata_p);
outsw(PIOP1(base), mb_p, len/2);
clen += count;
outw(PIOR0(base), tbd_p); /* address of act_count */
outw(PIOP0(base), inw(PIOP0(base)) + count);
xmtdata_p += len;
if ((tm_p = tm_p->m_next) == (struct mbuf *)0)
break;
if (count & 1) {
/* go to the next descriptor */
outw(PIOR0(base), tbd_p + 2);
tbd_p += sizeof (tbd_t);
outw(PIOP0(base), tbd_p); /* next_tbd_offset */
outw(PIOR0(base), tbd_p);
outw(PIOP0(base), 0); /* act_count */
outw(PIOR1(base), tbd_p + 4);
outw(PIOP1(base), xmtdata_p); /* buffer_addr */
outw(PIOP1(base), 0); /* buffer_base */
/* at the end -> coallesce remaining mbufs */
if (tbd_p == OFFSET_TBD + (N_TBD-1) * sizeof (tbd_t)) {
wlsftwsleaze(&count, &mb_p, &tm_p, unit);
continue;
}
/* next mbuf short -> coallesce as needed */
if ( (tm_p->m_next == (struct mbuf *) 0) ||
#define HDW_THRESHOLD 55
tm_p->m_len > HDW_THRESHOLD)
/* ok */;
else {
wlhdwsleaze(&count, &mb_p, &tm_p, unit);
continue;
}
}
} else if ((tm_p = tm_p->m_next) == (struct mbuf *)0)
break;
count = tm_p->m_len;
mb_p = mtod(tm_p, u_char *);
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
if (xmt_debug)
printf("mbuf+ L%d @%x ", count, mb_p);
#endif WLDEBUG
}
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
if (xmt_debug)
printf("CLEN = %d\n", clen);
#endif WLDEBUG
outw(PIOR0(base), tbd_p);
if (clen < ETHERMIN) {
outw(PIOP0(base), inw(PIOP0(base)) + ETHERMIN - clen);
outw(PIOR1(base), xmtdata_p);
for (xmtshort_p = xmtdata_p; clen < ETHERMIN; clen += 2)
outw(PIOP1(base), 0);
}
outw(PIOP0(base), inw(PIOP0(base)) | TBD_SW_EOF);
outw(PIOR0(base), tbd_p + 2);
outw(PIOP0(base), I82586NULL);
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG) {
if (xmt_debug) {
wltbd(unit);
printf("\n");
}
}
#endif WLDEBUG
outw(PIOR0(base), OFFSET_SCB + 2); /* address of scb_command */
/*
* wait for 586 to clear previous command, complain if it takes
* too long
*/
for (spin = 1;;spin = (spin + 1) % 10000) {
if (inw(PIOP0(base)) == 0) { /* it's done, we can go */
break;
}
if ((spin == 0) && xmt_watch) { /* not waking up, and we care */
printf("wl%d: slow accepting xmit\n",unit);
}
}
outw(PIOP0(base), SCB_CU_STRT); /* new command */
SET_CHAN_ATTN(unit);
m_freem(m);
/* XXX
* Pause to avoid transmit overrun problems.
* The required delay tends to vary with platform type, and may be
* related to interrupt loss.
*/
if (wl_xmit_delay) {
DELAY(wl_xmit_delay);
}
return;
}
/*
* wlbldru:
*
* This function builds the linear linked lists of fd's and
* rbd's. Based on page 4-32 of 1986 Intel microcom handbook.
*
*/
static u_short
wlbldru(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
fd_t fd;
rbd_t rbd;
u_short fd_p = OFFSET_RU;
u_short rbd_p = OFFSET_RBD;
int i;
sc->begin_fd = fd_p;
for(i = 0; i < N_FD; i++) {
fd.status = 0;
fd.command = 0;
fd.link_offset = fd_p + sizeof(fd_t);
fd.rbd_offset = I82586NULL;
outw(PIOR1(base), fd_p);
outsw(PIOP1(base), &fd, 8/2);
fd_p = fd.link_offset;
}
fd_p -= sizeof(fd_t);
sc->end_fd = fd_p;
outw(PIOR1(base), fd_p + 2);
outw(PIOP1(base), AC_CW_EL); /* command */
outw(PIOP1(base), I82586NULL); /* link_offset */
fd_p = OFFSET_RU;
outw(PIOR0(base), fd_p + 6); /* address of rbd_offset */
outw(PIOP0(base), rbd_p);
outw(PIOR1(base), rbd_p);
for(i = 0; i < N_RBD; i++) {
rbd.status = 0;
rbd.buffer_addr = rbd_p + sizeof(rbd_t) + 2;
rbd.buffer_base = 0;
rbd.size = RCVBUFSIZE;
if (i != N_RBD-1) {
rbd_p += sizeof(ru_t);
rbd.next_rbd_offset = rbd_p;
} else {
rbd.next_rbd_offset = I82586NULL;
rbd.size |= AC_CW_EL;
sc->end_rbd = rbd_p;
}
outsw(PIOP1(base), &rbd, sizeof(rbd_t)/2);
outw(PIOR1(base), rbd_p);
}
return sc->begin_fd;
}
/*
* wlrustrt:
*
* This routine starts the receive unit running. First checks if the
* board is actually ready, then the board is instructed to receive
* packets again.
*
*/
static void
wlrustrt(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
u_short rfa;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlrustrt()\n",unit);
#endif
outw(PIOR0(base), OFFSET_SCB);
if (inw(PIOP0(base)) & SCB_RUS_READY){
printf("wlrustrt: RUS_READY\n");
return;
}
outw(PIOR0(base), OFFSET_SCB + 2);
outw(PIOP0(base), SCB_RU_STRT); /* command */
rfa = wlbldru(unit);
outw(PIOR0(base), OFFSET_SCB + 6); /* address of scb_rfa_offset */
outw(PIOP0(base), rfa);
SET_CHAN_ATTN(unit);
return;
}
/*
* wldiag:
*
* This routine does a 586 op-code number 7, and obtains the
* diagnose status for the WaveLAN.
*
*/
static int
wldiag(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
short status;
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wldiag()\n",unit);
#endif
outw(PIOR0(base), OFFSET_SCB);
status = inw(PIOP0(base));
if (status & SCB_SW_INT) {
/* state is 2000 which seems ok
printf("wl%d diag(): unexpected initial state %\n",
unit, inw(PIOP0(base)));
*/
wlack(unit);
}
outw(PIOR1(base), OFFSET_CU);
outw(PIOP1(base), 0); /* ac_status */
outw(PIOP1(base), AC_DIAGNOSE|AC_CW_EL);/* ac_command */
if(wlcmd(unit, "diag()") == 0)
return 0;
outw(PIOR0(base), OFFSET_CU);
if (inw(PIOP0(base)) & 0x0800) {
printf("wl%d: i82586 Self Test failed!\n", unit);
return 0;
}
return TRUE;
}
/*
* wlconfig:
*
* This routine does a standard config of the WaveLAN board.
*
*/
static int
wlconfig(int unit)
{
configure_t configure;
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
#if MULTICAST
#if __FreeBSD__ >= 3
struct ifmultiaddr *ifma;
u_char *addrp;
#else
struct ether_multi *enm;
struct ether_multistep step;
#endif
int cnt;
#endif MULTICAST
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: entered wlconfig()\n",unit);
#endif
outw(PIOR0(base), OFFSET_SCB);
if (inw(PIOP0(base)) & SCB_SW_INT) {
/*
printf("wl%d config(): unexpected initial state %x\n",
unit, inw(PIOP0(base)));
*/
}
wlack(unit);
outw(PIOR1(base), OFFSET_CU);
outw(PIOP1(base), 0); /* ac_status */
outw(PIOP1(base), AC_CONFIGURE|AC_CW_EL); /* ac_command */
/* jrb hack */
configure.fifolim_bytecnt = 0x080c;
configure.addrlen_mode = 0x0600;
configure.linprio_interframe = 0x2060;
configure.slot_time = 0xf200;
configure.hardware = 0x0008; /* tx even w/o CD */
configure.min_frame_len = 0x0040;
#if 0
/* This is the configuration block suggested by Marc Meertens
* <mmeerten@obelix.utrecht.NCR.COM> in an e-mail message to John
* Ioannidis on 10 Nov 92.
*/
configure.fifolim_bytecnt = 0x040c;
configure.addrlen_mode = 0x0600;
configure.linprio_interframe = 0x2060;
configure.slot_time = 0xf000;
configure.hardware = 0x0008; /* tx even w/o CD */
configure.min_frame_len = 0x0040;
#else
/*
* below is the default board configuration from p2-28 from 586 book
*/
configure.fifolim_bytecnt = 0x080c;
configure.addrlen_mode = 0x2600;
configure.linprio_interframe = 0x7820; /* IFS=120, ACS=2 */
configure.slot_time = 0xf00c; /* slottime=12 */
configure.hardware = 0x0008; /* tx even w/o CD */
configure.min_frame_len = 0x0040;
#endif
if(sc->mode & MOD_PROM)
configure.hardware |= 1;
outw(PIOR1(base), OFFSET_CU + 6);
outsw(PIOP1(base), &configure, sizeof(configure_t)/2);
if(wlcmd(unit, "config()-configure") == 0)
return 0;
#if MULTICAST
outw(PIOR1(base), OFFSET_CU);
outw(PIOP1(base), 0); /* ac_status */
outw(PIOP1(base), AC_MCSETUP|AC_CW_EL); /* ac_command */
outw(PIOR1(base), OFFSET_CU + 8);
cnt = 0;
#if __FreeBSD__ >= 3
for (ifma = sc->wl_if.if_multiaddrs.lh_first; ifma;
ifma = ifma->ifma_link.le_next) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
addrp = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
outw(PIOP1(base), addrp[0] + (addrp[1] << 8));
outw(PIOP1(base), addrp[2] + (addrp[3] << 8));
outw(PIOP1(base), addrp[4] + (addrp[5] << 8));
++cnt;
}
#else
ETHER_FIRST_MULTI(step, &sc->wl_ac, enm);
while (enm != NULL) {
unsigned int lo, hi;
lo = (enm->enm_addrlo[3] << 16) + (enm->enm_addrlo[4] << 8)
+ enm->enm_addrlo[5];
hi = (enm->enm_addrhi[3] << 16) + (enm->enm_addrhi[4] << 8)
+ enm->enm_addrhi[5];
while(lo <= hi) {
outw(PIOP1(base),enm->enm_addrlo[0] +
(enm->enm_addrlo[1] << 8));
outw(PIOP1(base),enm->enm_addrlo[2] +
((lo >> 8) & 0xff00));
outw(PIOP1(base), ((lo >> 8) & 0xff) +
((lo << 8) & 0xff00));
++cnt;
++lo;
}
ETHER_NEXT_MULTI(step, enm);
}
#endif
outw(PIOR1(base), OFFSET_CU + 6); /* mc-cnt */
outw(PIOP1(base), cnt * WAVELAN_ADDR_SIZE);
if(wlcmd(unit, "config()-mcaddress") == 0)
return 0;
#endif MULTICAST
outw(PIOR1(base), OFFSET_CU);
outw(PIOP1(base), 0); /* ac_status */
outw(PIOP1(base), AC_IASETUP|AC_CW_EL); /* ac_command */
outw(PIOR1(base), OFFSET_CU + 6);
outsw(PIOP1(base), sc->wl_addr, WAVELAN_ADDR_SIZE/2);
if(wlcmd(unit, "config()-address") == 0)
return(0);
wlinitmmc(unit);
return(1);
}
/*
* wlcmd:
*
* Set channel attention bit and busy wait until command has
* completed. Then acknowledge the command completion.
*/
static int
wlcmd(int unit, char *str)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
int i;
outw(PIOR0(base), OFFSET_SCB + 2); /* address of scb_command */
outw(PIOP0(base), SCB_CU_STRT);
SET_CHAN_ATTN(unit);
outw(PIOR0(base), OFFSET_CU);
for(i = 0; i < 0xffff; i++)
if (inw(PIOP0(base)) & AC_SW_C)
break;
if (i == 0xffff || !(inw(PIOP0(base)) & AC_SW_OK)) {
printf("wl%d: %s failed; status = %d, inw = %x, outw = %x\n",
unit, str, inw(PIOP0(base)) & AC_SW_OK, inw(PIOP0(base)), inw(PIOR0(base)));
outw(PIOR0(base), OFFSET_SCB);
printf("scb_status %x\n", inw(PIOP0(base)));
outw(PIOR0(base), OFFSET_SCB+2);
printf("scb_command %x\n", inw(PIOP0(base)));
outw(PIOR0(base), OFFSET_SCB+4);
printf("scb_cbl %x\n", inw(PIOP0(base)));
outw(PIOR0(base), OFFSET_CU+2);
printf("cu_cmd %x\n", inw(PIOP0(base)));
return(0);
}
outw(PIOR0(base), OFFSET_SCB);
if ((inw(PIOP0(base)) & SCB_SW_INT) && (inw(PIOP0(base)) != SCB_SW_CNA)) {
/*
printf("wl%d %s: unexpected final state %x\n",
unit, str, inw(PIOP0(base)));
*/
}
wlack(unit);
return(TRUE);
}
/*
* wlack: if the 82596 wants attention because it has finished
* sending or receiving a packet, acknowledge its desire and
* return bits indicating the kind of attention. wlack() returns
* these bits so that the caller can service exactly the
* conditions that wlack() acknowledged.
*/
static int
wlack(int unit)
{
int i;
register u_short cmd;
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
outw(PIOR1(base), OFFSET_SCB);
if(!(cmd = (inw(PIOP1(base)) & SCB_SW_INT)))
return(0);
#ifdef WLDEBUG
if (sc->wl_if.if_flags & IFF_DEBUG)
printf("wl%d: doing a wlack()\n",unit);
#endif
outw(PIOP1(base), cmd);
SET_CHAN_ATTN(unit);
outw(PIOR0(base), OFFSET_SCB + 2); /* address of scb_command */
for (i = 1000000; inw(PIOP0(base)) && (i-- > 0); );
if (i < 1)
printf("wl%d wlack(): board not accepting command.\n", unit);
return(cmd);
}
static void
wltbd(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
u_short tbd_p = OFFSET_TBD;
tbd_t tbd;
int i = 0;
int sum = 0;
for (;;) {
outw(PIOR1(base), tbd_p);
insw(PIOP1(base), &tbd, sizeof(tbd_t)/2);
sum += (tbd.act_count & ~TBD_SW_EOF);
printf("%d: addr %x, count %d (%d), next %x, base %x\n",
i++, tbd.buffer_addr,
(tbd.act_count & ~TBD_SW_EOF), sum,
tbd.next_tbd_offset, tbd.buffer_base);
if (tbd.act_count & TBD_SW_EOF)
break;
tbd_p = tbd.next_tbd_offset;
}
}
static void
wlhdwsleaze(u_short *countp, u_char **mb_pp, struct mbuf **tm_pp, int unit)
{
struct mbuf *tm_p = *tm_pp;
u_char *mb_p = *mb_pp;
u_short count = 0;
u_char *cp;
int len;
/*
* can we get a run that will be coallesced or
* that terminates before breaking
*/
do {
count += tm_p->m_len;
if (tm_p->m_len & 1)
break;
} while ((tm_p = tm_p->m_next) != (struct mbuf *)0);
if ( (tm_p == (struct mbuf *)0) ||
count > HDW_THRESHOLD) {
*countp = (*tm_pp)->m_len;
*mb_pp = mtod((*tm_pp), u_char *);
return;
}
/* we need to copy */
tm_p = *tm_pp;
mb_p = *mb_pp;
count = 0;
cp = (u_char *) t_packet;
for (;;) {
bcopy(mtod(tm_p, u_char *), cp, len = tm_p->m_len);
count += len;
if (count > HDW_THRESHOLD)
break;
cp += len;
if (tm_p->m_next == (struct mbuf *)0)
break;
tm_p = tm_p->m_next;
}
*countp = count;
*mb_pp = (u_char *) t_packet;
*tm_pp = tm_p;
return;
}
static void
wlsftwsleaze(u_short *countp, u_char **mb_pp, struct mbuf **tm_pp, int unit)
{
struct mbuf *tm_p = *tm_pp;
u_char *mb_p = *mb_pp;
u_short count = 0;
u_char *cp = (u_char *) t_packet;
int len;
/* we need to copy */
for (;;) {
bcopy(mtod(tm_p, u_char *), cp, len = tm_p->m_len);
count += len;
cp += len;
if (tm_p->m_next == (struct mbuf *)0)
break;
tm_p = tm_p->m_next;
}
*countp = count;
*mb_pp = (u_char *) t_packet;
*tm_pp = tm_p;
return;
}
static void
wlmmcstat(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
u_short tmp;
printf("wl%d: DCE_STATUS: 0x%x, ", unit,
wlmmcread(base,MMC_DCE_STATUS) & 0x0f);
tmp = wlmmcread(base,MMC_CORRECT_NWID_H) << 8;
tmp |= wlmmcread(base,MMC_CORRECT_NWID_L);
printf("Correct NWID's: %d, ", tmp);
tmp = wlmmcread(base,MMC_WRONG_NWID_H) << 8;
tmp |= wlmmcread(base,MMC_WRONG_NWID_L);
printf("Wrong NWID's: %d\n", tmp);
printf("THR_PRE_SET: 0x%x, ", wlmmcread(base,MMC_THR_PRE_SET));
printf("SIGNAL_LVL: %d, SILENCE_LVL: %d\n",
wlmmcread(base,MMC_SIGNAL_LVL),
wlmmcread(base,MMC_SILENCE_LVL));
printf("SIGN_QUAL: 0x%x, NETW_ID: %x:%x, DES: %d\n",
wlmmcread(base,MMC_SIGN_QUAL),
wlmmcread(base,MMC_NETW_ID_H),
wlmmcread(base,MMC_NETW_ID_L),
wlmmcread(base,MMC_DES_AVAIL));
}
static u_short
wlmmcread(u_int base, u_short reg)
{
while(inw(HASR(base)) & HASR_MMC_BUSY) ;
outw(MMCR(base),reg << 1);
while(inw(HASR(base)) & HASR_MMC_BUSY) ;
return (u_short)inw(MMCR(base)) >> 8;
}
static void
getsnr(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
register int s;
MMC_WRITE(MMC_FREEZE,1);
/*
* SNR retrieval procedure :
*
* read signal level : wlmmcread(base, MMC_SIGNAL_LVL);
* read silence level : wlmmcread(base, MMC_SILENCE_LVL);
*/
MMC_WRITE(MMC_FREEZE,0);
/*
* SNR is signal:silence ratio.
*/
}
/*
** wlgetpsa
**
** Reads the psa for the wavelan at (base) into (buf)
*/
static void
wlgetpsa(int base, u_char *buf)
{
int i;
PCMD(base, HACR_DEFAULT & ~HACR_16BITS);
PCMD(base, HACR_DEFAULT & ~HACR_16BITS);
for (i = 0; i < 0x40; i++) {
outw(PIOR2(base), i);
buf[i] = inb(PIOP2(base));
}
PCMD(base, HACR_DEFAULT);
PCMD(base, HACR_DEFAULT);
}
/*
** wlsetpsa
**
** Writes the psa for wavelan (unit) from the softc back to the
** board. Updates the CRC and sets the CRC OK flag.
**
** Do not call this when the board is operating, as it doesn't
** preserve the hacr.
*/
static void
wlsetpsa(int unit)
{
register struct wl_softc *sc = WLSOFTC(unit);
short base = sc->base;
int i, oldpri;
u_short crc;
crc = wlpsacrc(sc->psa); /* calculate CRC of PSA */
sc->psa[WLPSA_CRCLOW] = crc & 0xff;
sc->psa[WLPSA_CRCHIGH] = (crc >> 8) & 0xff;
sc->psa[WLPSA_CRCOK] = 0x55; /* default to 'bad' until programming complete */
oldpri = splimp(); /* ick, long pause */
PCMD(base, HACR_DEFAULT & ~HACR_16BITS);
PCMD(base, HACR_DEFAULT & ~HACR_16BITS);
for (i = 0; i < 0x40; i++) {
DELAY(DELAYCONST);
outw(PIOR2(base),i); /* write param memory */
DELAY(DELAYCONST);
outb(PIOP2(base), sc->psa[i]);
}
DELAY(DELAYCONST);
outw(PIOR2(base),WLPSA_CRCOK); /* update CRC flag*/
DELAY(DELAYCONST);
sc->psa[WLPSA_CRCOK] = 0xaa; /* OK now */
outb(PIOP2(base), 0xaa); /* all OK */
DELAY(DELAYCONST);
PCMD(base, HACR_DEFAULT);
PCMD(base, HACR_DEFAULT);
splx(oldpri);
}
/*
** CRC routine provided by Christopher Giordano <cgiordan@gdeb.com>,
** from original code by Tomi Mikkonen (tomitm@remedy.fi)
*/
static u_int crc16_table[16] = {
0x0000, 0xCC01, 0xD801, 0x1400,
0xF001, 0x3C00, 0x2800, 0xE401,
0xA001, 0x6C00, 0x7800, 0xB401,
0x5000, 0x9C01, 0x8801, 0x4400
};
static u_short
wlpsacrc(u_char *buf)
{
u_short crc = 0;
int i, r1;
for (i = 0; i < 0x3d; i++, buf++) {
/* lower 4 bits */
r1 = crc16_table[crc & 0xF];
crc = (crc >> 4) & 0x0FFF;
crc = crc ^ r1 ^ crc16_table[*buf & 0xF];
/* upper 4 bits */
r1 = crc16_table[crc & 0xF];
crc = (crc >> 4) & 0x0FFF;
crc = crc ^ r1 ^ crc16_table[(*buf >> 4) & 0xF];
}
return(crc);
}
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