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NetBSD/sys/dev/pcmcia/if_cnw.c

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/* $NetBSD: if_cnw.c,v 1.25 2003/11/10 08:55:41 wiz Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Michael Eriksson.
*
* 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 the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 1996, 1997 Berkeley Software Design, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that this notice is retained,
* the conditions in the following notices are met, and terms applying
* to contributors in the following notices also apply to Berkeley
* Software Design, Inc.
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Berkeley Software Design, Inc.
* 4. Neither the name of the Berkeley Software Design, Inc. nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``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 BERKELEY SOFTWARE DESIGN, INC. 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.
*
* Paul Borman, December 1996
*
* This driver is derived from a generic frame work which is
* Copyright(c) 1994,1995,1996
* Yoichi Shinoda, Yoshitaka Tokugawa, WIDE Project, Wildboar Project
* and Foretune. All rights reserved.
*
* A linux driver was used as the "hardware reference manual" (i.e.,
* to determine registers and a general outline of how the card works)
* That driver is publically available and copyright
*
* John Markus Bj<42>rndalen
* Department of Computer Science
* University of Troms<6D>
* Norway
* johnm@staff.cs.uit.no, http://www.cs.uit.no/~johnm/
*/
/*
* This is a driver for the Xircom CreditCard Netwave (also known as
* the Netwave Airsurfer) wireless LAN PCMCIA adapter.
*
* When this driver was developed, the Linux Netwave driver was used
* as a hardware manual. That driver is Copyright (c) 1997 University
* of Troms<6D>, Norway. It is part of the Linux pcmcia-cs package that
* can be found at http://pcmcia-cs.sourceforge.net/. The most recent
* version of the pcmcia-cs package when this driver was written was
* 3.0.6.
*
* Unfortunately, a lot of explicit numeric constants were used in the
* Linux driver. I have tried to use symbolic names whenever possible,
* but since I don't have any real hardware documentation, there's
* still one or two "magic numbers" :-(.
*
* Driver limitations: This driver doesn't do multicasting or receiver
* promiscuity, because of missing hardware documentation. I couldn't
* get receiver promiscuity to work, and I haven't even tried
* multicast. Volunteers are welcome, of course :-).
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_cnw.c,v 1.25 2003/11/10 08:55:41 wiz Exp $");
#include "opt_inet.h"
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <net/if.h>
#include <dev/pcmcia/if_cnwreg.h>
#include <dev/pcmcia/if_cnwioctl.h>
#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciadevs.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_inarp.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
/*
* Let these be patchable variables, initialized from macros that can
* be set in the kernel config file. Someone with lots of spare time
* could probably write a nice Netwave configuration program to do
* this a little bit more elegantly :-).
*/
#ifndef CNW_DOMAIN
#define CNW_DOMAIN 0x100
#endif
int cnw_domain = CNW_DOMAIN; /* Domain */
#ifndef CNW_SCRAMBLEKEY
#define CNW_SCRAMBLEKEY 0
#endif
int cnw_skey = CNW_SCRAMBLEKEY; /* Scramble key */
/*
* The card appears to work much better when we only allow one packet
* "in the air" at a time. This is done by not allowing another packet
* on the card, even if there is room. Turning this off will allow the
* driver to stuff packets on the card as soon as a transmit buffer is
* available. This does increase the number of collisions, though.
* We can que a second packet if there are transmit buffers available,
* but we do not actually send the packet until the last packet has
* been written.
*/
#define ONE_AT_A_TIME
/*
* Netwave cards choke if we try to use io memory address >= 0x400.
* Even though, CIS tuple does not talk about this.
* Use memory mapped access.
*/
#define MEMORY_MAPPED
int cnw_match __P((struct device *, struct cfdata *, void *));
void cnw_attach __P((struct device *, struct device *, void *));
int cnw_detach __P((struct device *, int));
int cnw_activate __P((struct device *, enum devact));
struct cnw_softc {
struct device sc_dev; /* Device glue (must be first) */
struct ethercom sc_ethercom; /* Ethernet common part */
int sc_domain; /* Netwave domain */
int sc_skey; /* Netwave scramble key */
struct cnwstats sc_stats;
/* PCMCIA-specific stuff */
struct pcmcia_function *sc_pf; /* PCMCIA function */
#ifndef MEMORY_MAPPED
struct pcmcia_io_handle sc_pcioh; /* PCMCIA I/O space handle */
int sc_iowin; /* ...window */
bus_space_tag_t sc_iot; /* ...bus_space tag */
bus_space_handle_t sc_ioh; /* ...bus_space handle */
#endif
struct pcmcia_mem_handle sc_pcmemh; /* PCMCIA memory handle */
bus_size_t sc_memoff; /* ...offset */
int sc_memwin; /* ...window */
bus_space_tag_t sc_memt; /* ...bus_space tag */
bus_space_handle_t sc_memh; /* ...bus_space handle */
void *sc_ih; /* Interrupt cookie */
struct timeval sc_txlast; /* When the last xmit was made */
int sc_active; /* Currently xmitting a packet */
int sc_resource; /* Resources alloc'ed on attach */
#define CNW_RES_PCIC 1
#define CNW_RES_IO 2
#define CNW_RES_MEM 4
#define CNW_RES_NET 8
};
CFATTACH_DECL(cnw, sizeof(struct cnw_softc),
cnw_match, cnw_attach, cnw_detach, cnw_activate);
void cnw_reset __P((struct cnw_softc *));
void cnw_init __P((struct cnw_softc *));
int cnw_enable __P((struct cnw_softc *sc));
void cnw_disable __P((struct cnw_softc *sc));
void cnw_config __P((struct cnw_softc *sc, u_int8_t *));
void cnw_start __P((struct ifnet *));
void cnw_transmit __P((struct cnw_softc *, struct mbuf *));
struct mbuf *cnw_read __P((struct cnw_softc *));
void cnw_recv __P((struct cnw_softc *));
int cnw_intr __P((void *arg));
int cnw_ioctl __P((struct ifnet *, u_long, caddr_t));
void cnw_watchdog __P((struct ifnet *));
static int cnw_setdomain __P((struct cnw_softc *, int));
static int cnw_setkey __P((struct cnw_softc *, int));
/* ---------------------------------------------------------------- */
/* Help routines */
static int wait_WOC __P((struct cnw_softc *, int));
static int read16 __P((struct cnw_softc *, int));
static int cnw_cmd __P((struct cnw_softc *, int, int, int, int));
/*
* Wait until the WOC (Write Operation Complete) bit in the
* ASR (Adapter Status Register) is asserted.
*/
static int
wait_WOC(sc, line)
struct cnw_softc *sc;
int line;
{
int i, asr;
for (i = 0; i < 5000; i++) {
#ifndef MEMORY_MAPPED
asr = bus_space_read_1(sc->sc_iot, sc->sc_ioh, CNW_REG_ASR);
#else
asr = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_ASR);
#endif
if (asr & CNW_ASR_WOC)
return (0);
DELAY(100);
}
if (line > 0)
printf("%s: wedged at line %d\n", sc->sc_dev.dv_xname, line);
return (1);
}
#define WAIT_WOC(sc) wait_WOC(sc, __LINE__)
/*
* Read a 16 bit value from the card.
*/
static int
read16(sc, offset)
struct cnw_softc *sc;
int offset;
{
int hi, lo;
int offs = sc->sc_memoff + offset;
/* This could presumably be done more efficient with
* bus_space_read_2(), but I don't know anything about the
* byte sex guarantees... Besides, this is pretty cheap as
* well :-)
*/
lo = bus_space_read_1(sc->sc_memt, sc->sc_memh, offs);
hi = bus_space_read_1(sc->sc_memt, sc->sc_memh, offs + 1);
return ((hi << 8) | lo);
}
/*
* Send a command to the card by writing it to the command buffer.
*/
int
cnw_cmd(sc, cmd, count, arg1, arg2)
struct cnw_softc *sc;
int cmd, count, arg1, arg2;
{
int ptr = sc->sc_memoff + CNW_EREG_CB;
if (wait_WOC(sc, 0)) {
printf("%s: wedged when issuing cmd 0x%x\n",
sc->sc_dev.dv_xname, cmd);
/*
* We'll continue anyway, as that's probably the best
* thing we can do; at least the user knows there's a
* problem, and can reset the interface with ifconfig
* down/up.
*/
}
bus_space_write_1(sc->sc_memt, sc->sc_memh, ptr, cmd);
if (count > 0) {
bus_space_write_1(sc->sc_memt, sc->sc_memh, ptr + 1, arg1);
if (count > 1)
bus_space_write_1(sc->sc_memt, sc->sc_memh,
ptr + 2, arg2);
}
bus_space_write_1(sc->sc_memt, sc->sc_memh,
ptr + count + 1, CNW_CMD_EOC);
return (0);
}
#define CNW_CMD0(sc, cmd) \
do { cnw_cmd(sc, cmd, 0, 0, 0); } while (0)
#define CNW_CMD1(sc, cmd, arg1) \
do { cnw_cmd(sc, cmd, 1, arg1 , 0); } while (0)
#define CNW_CMD2(sc, cmd, arg1, arg2) \
do { cnw_cmd(sc, cmd, 2, arg1, arg2); } while (0)
/* ---------------------------------------------------------------- */
/*
* Reset the hardware.
*/
void
cnw_reset(sc)
struct cnw_softc *sc;
{
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: resetting\n", sc->sc_dev.dv_xname);
#endif
wait_WOC(sc, 0);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh, CNW_REG_PMR, CNW_PMR_RESET);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_PMR, CNW_PMR_RESET);
#endif
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_ASCC, CNW_ASR_WOC);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh, CNW_REG_PMR, 0);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_PMR, 0);
#endif
}
/*
* Initialize the card.
*/
void
cnw_init(sc)
struct cnw_softc *sc;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
const u_int8_t rxmode =
CNW_RXCONF_RXENA | CNW_RXCONF_BCAST | CNW_RXCONF_AMP;
/* Reset the card */
cnw_reset(sc);
/* Issue a NOP to check the card */
CNW_CMD0(sc, CNW_CMD_NOP);
/* Set up receive configuration */
CNW_CMD1(sc, CNW_CMD_SRC,
rxmode | ((ifp->if_flags & IFF_PROMISC) ? CNW_RXCONF_PRO : 0));
/* Set up transmit configuration */
CNW_CMD1(sc, CNW_CMD_STC, CNW_TXCONF_TXENA);
/* Set domain */
CNW_CMD2(sc, CNW_CMD_SMD, sc->sc_domain, sc->sc_domain >> 8);
/* Set scramble key */
CNW_CMD2(sc, CNW_CMD_SSK, sc->sc_skey, sc->sc_skey >> 8);
/* Enable interrupts */
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh,
CNW_REG_IMR, CNW_IMR_IENA | CNW_IMR_RFU1);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_IMR,
CNW_IMR_IENA | CNW_IMR_RFU1);
#endif
/* Enable receiver */
CNW_CMD0(sc, CNW_CMD_ER);
/* "Set the IENA bit in COR" */
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
bus_space_write_1(sc->sc_iot, sc->sc_ioh, CNW_REG_COR,
CNW_COR_IENA | CNW_COR_LVLREQ);
#else
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_COR,
CNW_COR_IENA | CNW_COR_LVLREQ);
#endif
}
/*
* Enable and initialize the card.
*/
int
cnw_enable(sc)
struct cnw_softc *sc;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
if ((ifp->if_flags & IFF_RUNNING) != 0)
return (0);
sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_NET, cnw_intr, sc);
if (sc->sc_ih == NULL) {
printf("%s: couldn't establish interrupt handler\n",
sc->sc_dev.dv_xname);
return (EIO);
}
if (pcmcia_function_enable(sc->sc_pf) != 0) {
printf("%s: couldn't enable card\n", sc->sc_dev.dv_xname);
return (EIO);
}
sc->sc_resource |= CNW_RES_PCIC;
cnw_init(sc);
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_flags |= IFF_RUNNING;
return (0);
}
/*
* Stop and disable the card.
*/
void
cnw_disable(sc)
struct cnw_softc *sc;
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
if ((ifp->if_flags & IFF_RUNNING) == 0)
return;
pcmcia_function_disable(sc->sc_pf);
sc->sc_resource &= ~CNW_RES_PCIC;
pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih);
ifp->if_flags &= ~IFF_RUNNING;
ifp->if_timer = 0;
}
/*
* Match the hardware we handle.
*/
int
cnw_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pcmcia_attach_args *pa = aux;
if (pa->manufacturer == PCMCIA_VENDOR_XIRCOM &&
pa->product == PCMCIA_PRODUCT_XIRCOM_CNW_801)
return 1;
if (pa->manufacturer == PCMCIA_VENDOR_XIRCOM &&
pa->product == PCMCIA_PRODUCT_XIRCOM_CNW_802)
return 1;
return 0;
}
/*
* Attach the card.
*/
void
cnw_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct cnw_softc *sc = (void *) self;
struct pcmcia_attach_args *pa = aux;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
u_int8_t macaddr[ETHER_ADDR_LEN];
int i;
bus_size_t memsize;
sc->sc_resource = 0;
/* Enable the card */
sc->sc_pf = pa->pf;
pcmcia_function_init(sc->sc_pf, SIMPLEQ_FIRST(&sc->sc_pf->cfe_head));
if (pcmcia_function_enable(sc->sc_pf)) {
printf(": function enable failed\n");
return;
}
sc->sc_resource |= CNW_RES_PCIC;
/* Map I/O register and "memory" */
#ifndef MEMORY_MAPPED
if (pcmcia_io_alloc(sc->sc_pf, 0, CNW_IO_SIZE, CNW_IO_SIZE,
&sc->sc_pcioh) != 0) {
printf(": can't allocate i/o space\n");
goto fail;
}
if (pcmcia_io_map(sc->sc_pf, PCMCIA_WIDTH_IO16, 0,
CNW_IO_SIZE, &sc->sc_pcioh, &sc->sc_iowin) != 0) {
printf(": can't map i/o space\n");
pcmcia_io_free(sc->sc_pf, &sc->sc_pcioh);
goto fail;
}
sc->sc_iot = sc->sc_pcioh.iot;
sc->sc_ioh = sc->sc_pcioh.ioh;
sc->sc_resource |= CNW_RES_IO;
#endif
#ifndef MEMORY_MAPPED
memsize = CNW_MEM_SIZE;
#else
memsize = CNW_MEM_SIZE + CNW_IOM_SIZE;
#endif
if (pcmcia_mem_alloc(sc->sc_pf, memsize, &sc->sc_pcmemh) != 0) {
printf(": can't allocate memory\n");
goto fail;
}
if (pcmcia_mem_map(sc->sc_pf, PCMCIA_WIDTH_MEM8|PCMCIA_MEM_COMMON,
CNW_MEM_ADDR, memsize, &sc->sc_pcmemh, &sc->sc_memoff,
&sc->sc_memwin) != 0) {
printf(": can't map memory\n");
pcmcia_mem_free(sc->sc_pf, &sc->sc_pcmemh);
goto fail;
}
sc->sc_memt = sc->sc_pcmemh.memt;
sc->sc_memh = sc->sc_pcmemh.memh;
sc->sc_resource |= CNW_RES_MEM;
switch (pa->product) {
case PCMCIA_PRODUCT_XIRCOM_CNW_801:
printf(": %s\n", PCMCIA_STR_XIRCOM_CNW_801);
break;
case PCMCIA_PRODUCT_XIRCOM_CNW_802:
printf(": %s\n", PCMCIA_STR_XIRCOM_CNW_802);
break;
}
/* Finish setup of softc */
sc->sc_domain = cnw_domain;
sc->sc_skey = cnw_skey;
/* Get MAC address */
cnw_reset(sc);
for (i = 0; i < ETHER_ADDR_LEN; i++)
macaddr[i] = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_PA + i);
printf("%s: address %s\n", sc->sc_dev.dv_xname,
ether_sprintf(macaddr));
/* Set up ifnet structure */
strcpy(ifp->if_xname, sc->sc_dev.dv_xname);
ifp->if_softc = sc;
ifp->if_start = cnw_start;
ifp->if_ioctl = cnw_ioctl;
ifp->if_watchdog = cnw_watchdog;
ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX |
IFF_NOTRAILERS;
IFQ_SET_READY(&ifp->if_snd);
/* Attach the interface */
if_attach(ifp);
ether_ifattach(ifp, macaddr);
sc->sc_resource |= CNW_RES_NET;
ifp->if_baudrate = IF_Mbps(1);
/* Disable the card now, and turn it on when the interface goes up */
pcmcia_function_disable(sc->sc_pf);
sc->sc_resource &= ~CNW_RES_PCIC;
return;
fail:
#ifndef MEMORY_MAPPED
if ((sc->sc_resource & CNW_RES_IO) != 0) {
pcmcia_io_unmap(sc->sc_pf, sc->sc_iowin);
pcmcia_io_free(sc->sc_pf, &sc->sc_pcioh);
sc->sc_resource &= ~CNW_RES_IO;
}
#endif
if ((sc->sc_resource & CNW_RES_PCIC) != 0) {
pcmcia_function_disable(sc->sc_pf);
sc->sc_resource &= ~CNW_RES_PCIC;
}
}
/*
* Start outputting on the interface.
*/
void
cnw_start(ifp)
struct ifnet *ifp;
{
struct cnw_softc *sc = ifp->if_softc;
struct mbuf *m0;
int lif;
int asr;
#ifdef ONE_AT_A_TIME
struct timeval now;
#endif
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: cnw_start\n", ifp->if_xname);
if (ifp->if_flags & IFF_OACTIVE)
printf("%s: cnw_start reentered\n", ifp->if_xname);
#endif
ifp->if_flags |= IFF_OACTIVE;
for (;;) {
#ifdef ONE_AT_A_TIME
microtime(&now);
now.tv_sec -= sc->sc_txlast.tv_sec;
now.tv_usec -= sc->sc_txlast.tv_usec;
if (now.tv_usec < 0) {
now.tv_usec += 1000000;
now.tv_sec--;
}
/*
* Don't ship this packet out until the last
* packet has left the building.
* If we have not tried to send a packet for 1/5
* a second then we assume we lost an interrupt,
* lets go on and send the next packet anyhow.
*
* I suppose we could check to see if it is okay
* to put additional packets on the card (beyond
* the one already waiting to be sent) but I don't
* think we would get any improvement in speed as
* we should have ample time to put the next packet
* on while this one is going out.
*/
if (sc->sc_active && now.tv_sec == 0 && now.tv_usec < 200000)
break;
#endif
/* Make sure the link integrity field is on */
WAIT_WOC(sc);
lif = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_LIF);
if (lif == 0) {
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: link integrity %d\n", lif);
#endif
break;
}
/* Is there any buffer space available on the card? */
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
asr = bus_space_read_1(sc->sc_iot, sc->sc_ioh, CNW_REG_ASR);
#else
asr = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_ASR);
#endif
if (!(asr & CNW_ASR_TXBA)) {
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: no buffer space\n", ifp->if_xname);
#endif
break;
}
sc->sc_stats.nws_tx++;
IFQ_DEQUEUE(&ifp->if_snd, m0);
if (m0 == 0)
break;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m0);
#endif
cnw_transmit(sc, m0);
++ifp->if_opackets;
ifp->if_timer = 3; /* start watchdog timer */
microtime(&sc->sc_txlast);
sc->sc_active = 1;
}
ifp->if_flags &= ~IFF_OACTIVE;
}
/*
* Transmit a packet.
*/
void
cnw_transmit(sc, m0)
struct cnw_softc *sc;
struct mbuf *m0;
{
int buffer, bufsize, bufoffset, bufptr, bufspace, len, mbytes, n;
struct mbuf *m;
u_int8_t *mptr;
/* Get buffer info from card */
buffer = read16(sc, CNW_EREG_TDP);
bufsize = read16(sc, CNW_EREG_TDP + 2);
bufoffset = read16(sc, CNW_EREG_TDP + 4);
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: cnw_transmit b=0x%x s=%d o=0x%x\n",
sc->sc_dev.dv_xname, buffer, bufsize, bufoffset);
#endif
/* Copy data from mbuf chain to card buffers */
bufptr = sc->sc_memoff + buffer + bufoffset;
bufspace = bufsize;
len = 0;
for (m = m0; m; ) {
mptr = mtod(m, u_int8_t *);
mbytes = m->m_len;
len += mbytes;
while (mbytes > 0) {
if (bufspace == 0) {
buffer = read16(sc, buffer);
bufptr = sc->sc_memoff + buffer + bufoffset;
bufspace = bufsize;
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: next buffer @0x%x\n",
sc->sc_dev.dv_xname, buffer);
#endif
}
n = mbytes <= bufspace ? mbytes : bufspace;
bus_space_write_region_1(sc->sc_memt, sc->sc_memh,
bufptr, mptr, n);
bufptr += n;
bufspace -= n;
mptr += n;
mbytes -= n;
}
MFREE(m, m0);
m = m0;
}
/* Issue transmit command */
CNW_CMD2(sc, CNW_CMD_TL, len, len >> 8);
}
/*
* Pull a packet from the card into an mbuf chain.
*/
struct mbuf *
cnw_read(sc)
struct cnw_softc *sc;
{
struct mbuf *m, *top, **mp;
int totbytes, buffer, bufbytes, bufptr, mbytes, n;
u_int8_t *mptr;
WAIT_WOC(sc);
totbytes = read16(sc, CNW_EREG_RDP);
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: recv %d bytes\n", sc->sc_dev.dv_xname, totbytes);
#endif
buffer = CNW_EREG_RDP + 2;
bufbytes = 0;
bufptr = 0; /* XXX make gcc happy */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if;
m->m_pkthdr.len = totbytes;
mbytes = MHLEN;
top = 0;
mp = &top;
while (totbytes > 0) {
if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
m_freem(top);
return (0);
}
mbytes = MLEN;
}
if (totbytes >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_free(m);
m_freem(top);
return (0);
}
mbytes = MCLBYTES;
}
if (!top) {
int pad = ALIGN(sizeof(struct ether_header)) -
sizeof(struct ether_header);
m->m_data += pad;
mbytes -= pad;
}
mptr = mtod(m, u_int8_t *);
mbytes = m->m_len = min(totbytes, mbytes);
totbytes -= mbytes;
while (mbytes > 0) {
if (bufbytes == 0) {
buffer = read16(sc, buffer);
bufbytes = read16(sc, buffer + 2);
bufptr = sc->sc_memoff + buffer +
read16(sc, buffer + 4);
#ifdef CNW_DEBUG
if (sc->sc_ethercom.ec_if.if_flags & IFF_DEBUG)
printf("%s: %d bytes @0x%x+0x%x\n",
sc->sc_dev.dv_xname, bufbytes,
buffer, bufptr - buffer -
sc->sc_memoff);
#endif
}
n = mbytes <= bufbytes ? mbytes : bufbytes;
bus_space_read_region_1(sc->sc_memt, sc->sc_memh,
bufptr, mptr, n);
bufbytes -= n;
bufptr += n;
mbytes -= n;
mptr += n;
}
*mp = m;
mp = &m->m_next;
}
return (top);
}
/*
* Handle received packets.
*/
void
cnw_recv(sc)
struct cnw_softc *sc;
{
int rser;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct mbuf *m;
for (;;) {
WAIT_WOC(sc);
rser = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_RSER);
if (!(rser & CNW_RSER_RXAVAIL))
return;
/* Pull packet off card */
m = cnw_read(sc);
/* Acknowledge packet */
CNW_CMD0(sc, CNW_CMD_SRP);
/* Did we manage to get the packet from the interface? */
if (m == 0) {
++ifp->if_ierrors;
return;
}
++ifp->if_ipackets;
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
/* Pass the packet up. */
(*ifp->if_input)(ifp, m);
}
}
/*
* Interrupt handler.
*/
int
cnw_intr(arg)
void *arg;
{
struct cnw_softc *sc = arg;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
int ret, status, rser, tser;
if ((sc->sc_ethercom.ec_if.if_flags & IFF_RUNNING) == 0 ||
(sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return (0);
ifp->if_timer = 0; /* stop watchdog timer */
ret = 0;
for (;;) {
WAIT_WOC(sc);
#ifndef MEMORY_MAPPED
status = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
CNW_REG_CCSR);
#else
status = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_CCSR);
#endif
if (!(status & 0x02)) {
if (ret == 0)
printf("%s: spurious interrupt\n",
sc->sc_dev.dv_xname);
return (ret);
}
ret = 1;
#ifndef MEMORY_MAPPED
status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, CNW_REG_ASR);
#else
status = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_IOM_OFF + CNW_REG_ASR);
#endif
/* Anything to receive? */
if (status & CNW_ASR_RXRDY) {
sc->sc_stats.nws_rx++;
cnw_recv(sc);
}
/* Receive error */
if (status & CNW_ASR_RXERR) {
/*
* I get a *lot* of spurious receive errors
* (many per second), even when the interface
* is quiescent, so we don't increment
* if_ierrors here.
*/
rser = bus_space_read_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_RSER);
/* RX statistics */
sc->sc_stats.nws_rxerr++;
if (rser & CNW_RSER_RXBIG)
sc->sc_stats.nws_rxframe++;
if (rser & CNW_RSER_RXCRC)
sc->sc_stats.nws_rxcrcerror++;
if (rser & CNW_RSER_RXOVERRUN)
sc->sc_stats.nws_rxoverrun++;
if (rser & CNW_RSER_RXOVERFLOW)
sc->sc_stats.nws_rxoverflow++;
if (rser & CNW_RSER_RXERR)
sc->sc_stats.nws_rxerrors++;
if (rser & CNW_RSER_RXAVAIL)
sc->sc_stats.nws_rxavail++;
/* Clear error bits in RSER */
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_RSERW,
CNW_RSER_RXERR |
(rser & (CNW_RSER_RXCRC | CNW_RSER_RXBIG)));
/* Clear RXERR in ASR */
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_ASCC, CNW_ASR_RXERR);
}
/* Transmit done */
if (status & CNW_ASR_TXDN) {
tser = bus_space_read_1(sc->sc_memt, sc->sc_memh,
CNW_EREG_TSER);
/* TX statistics */
if (tser & CNW_TSER_TXERR)
sc->sc_stats.nws_txerrors++;
if (tser & CNW_TSER_TXNOAP)
sc->sc_stats.nws_txlostcd++;
if (tser & CNW_TSER_TXGU)
sc->sc_stats.nws_txabort++;
if (tser & CNW_TSER_TXOK) {
sc->sc_stats.nws_txokay++;
sc->sc_stats.nws_txretries[status & 0xf]++;
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_TSERW,
CNW_TSER_TXOK | CNW_TSER_RTRY);
}
if (tser & CNW_TSER_ERROR) {
++ifp->if_oerrors;
WAIT_WOC(sc);
bus_space_write_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_TSERW,
(tser & CNW_TSER_ERROR) |
CNW_TSER_RTRY);
}
sc->sc_active = 0;
ifp->if_flags &= ~IFF_OACTIVE;
/* Continue to send packets from the queue */
cnw_start(&sc->sc_ethercom.ec_if);
}
}
}
/*
* Handle device ioctls.
*/
int
cnw_ioctl(ifp, cmd, data)
struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
struct cnw_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
int s, error = 0;
struct proc *p = curproc; /*XXX*/
s = splnet();
switch (cmd) {
case SIOCSIFADDR:
if (!(ifp->if_flags & IFF_RUNNING) &&
(error = cnw_enable(sc)) != 0)
break;
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
cnw_init(sc);
arp_ifinit(&sc->sc_ethercom.ec_if, ifa);
break;
#endif
default:
cnw_init(sc);
break;
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == IFF_RUNNING) {
/*
* The interface is marked down and it is running, so
* stop it.
*/
cnw_disable(sc);
} else if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == IFF_UP){
/*
* The interface is marked up and it is stopped, so
* start it.
*/
error = cnw_enable(sc);
} else {
/* IFF_PROMISC may be changed */
cnw_init(sc);
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/* Update our multicast list. */
error = (cmd == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->sc_ethercom) :
ether_delmulti(ifr, &sc->sc_ethercom);
if (error == ENETRESET || error == 0) {
cnw_init(sc);
error = 0;
}
break;
case SIOCGCNWDOMAIN:
((struct ifreq *)data)->ifr_domain = sc->sc_domain;
break;
case SIOCSCNWDOMAIN:
error = suser(p->p_ucred, &p->p_acflag);
if (error)
break;
error = cnw_setdomain(sc, ifr->ifr_domain);
break;
case SIOCSCNWKEY:
error = suser(p->p_ucred, &p->p_acflag);
if (error)
break;
error = cnw_setkey(sc, ifr->ifr_key);
break;
case SIOCGCNWSTATUS:
error = suser(p->p_ucred, &p->p_acflag);
if (error)
break;
if ((ifp->if_flags & IFF_RUNNING) == 0)
break;
bus_space_read_region_1(sc->sc_memt, sc->sc_memh,
sc->sc_memoff + CNW_EREG_CB,
((struct cnwstatus *)data)->data,
sizeof(((struct cnwstatus *)data)->data));
break;
case SIOCGCNWSTATS:
memcpy((void *)&(((struct cnwistats *)data)->stats),
(void *)&sc->sc_stats, sizeof(struct cnwstats));
break;
default:
error = EINVAL;
break;
}
splx(s);
return (error);
}
/*
* Device timeout/watchdog routine. Entered if the device neglects to
* generate an interrupt after a transmit has been started on it.
*/
void
cnw_watchdog(ifp)
struct ifnet *ifp;
{
struct cnw_softc *sc = ifp->if_softc;
printf("%s: device timeout; card reset\n", sc->sc_dev.dv_xname);
++ifp->if_oerrors;
cnw_init(sc);
}
int
cnw_setdomain(sc, domain)
struct cnw_softc *sc;
int domain;
{
int s;
if (domain & ~0x1ff)
return EINVAL;
s = splnet();
CNW_CMD2(sc, CNW_CMD_SMD, domain, domain >> 8);
splx(s);
sc->sc_domain = domain;
return 0;
}
int
cnw_setkey(sc, key)
struct cnw_softc *sc;
int key;
{
int s;
if (key & ~0xffff)
return EINVAL;
s = splnet();
CNW_CMD2(sc, CNW_CMD_SSK, key, key >> 8);
splx(s);
sc->sc_skey = key;
return 0;
}
int
cnw_activate(self, act)
struct device *self;
enum devact act;
{
struct cnw_softc *sc = (struct cnw_softc *)self;
int rv = 0, s;
s = splnet();
switch (act) {
case DVACT_ACTIVATE:
rv = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
if_deactivate(&sc->sc_ethercom.ec_if);
break;
}
splx(s);
return (rv);
}
int
cnw_detach(self, flags)
struct device *self;
int flags;
{
struct cnw_softc *sc = (struct cnw_softc *)self;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
/* cnw_disable() checks IFF_RUNNING */
cnw_disable(sc);
if ((sc->sc_resource & CNW_RES_NET) != 0) {
ether_ifdetach(ifp);
if_detach(ifp);
}
#ifndef MEMORY_MAPPED
/* unmap and free our i/o windows */
if ((sc->sc_resource & CNW_RES_IO) != 0) {
pcmcia_io_unmap(sc->sc_pf, sc->sc_iowin);
pcmcia_io_free(sc->sc_pf, &sc->sc_pcioh);
}
#endif
/* unmap and free our memory windows */
if ((sc->sc_resource & CNW_RES_MEM) != 0) {
pcmcia_mem_unmap(sc->sc_pf, sc->sc_memwin);
pcmcia_mem_free(sc->sc_pf, &sc->sc_pcmemh);
}
return (0);
}
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