FreeBSD-5.3/sys/dev/ar/if_ar_isa.c
/*
* Copyright (c) 1995 - 2001 John Hay. All rights reserved.
*
* 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. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY John Hay ``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 John Hay 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/ar/if_ar_isa.c,v 1.53 2003/08/24 17:48:04 obrien Exp $");
/*
* Programming assumptions and other issues.
*
* The descriptors of a DMA channel will fit in a 16K memory window.
*
* The buffers of a transmit DMA channel will fit in a 16K memory window.
*
* Only the ISA bus cards with X.21 and V.35 is tested.
*
* When interface is going up, handshaking is set and it is only cleared
* when the interface is down'ed.
*
* There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE,
* internal/external clock, etc.....
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include "isa_if.h"
#include <dev/ic/hd64570.h>
#include <dev/ar/if_arregs.h>
#ifdef TRACE
#define TRC(x) x
#else
#define TRC(x)
#endif
#define TRCL(x) x
static int ar_isa_probe (device_t);
static int ar_isa_attach (device_t);
static struct isa_pnp_id ar_ids[] = {
{0, NULL}
};
static device_method_t ar_methods[] = {
DEVMETHOD(device_probe, ar_isa_probe),
DEVMETHOD(device_attach, ar_isa_attach),
DEVMETHOD(device_detach, ar_detach),
{ 0, 0 }
};
static driver_t ar_isa_driver = {
"ar",
ar_methods,
sizeof (struct ar_hardc)
};
DRIVER_MODULE(ar, isa, ar_isa_driver, ar_devclass, 0, 0);
MODULE_DEPEND(ar, isa, 1, 1, 1);
/*
* Probe to see if it is there.
* Get its information and fill it in.
*/
static int
ar_isa_probe(device_t device)
{
int error;
u_long membase, memsize;
struct ar_hardc *hc;
error = ISA_PNP_PROBE(device_get_parent(device), device, ar_ids);
if(error == ENXIO || error == 0)
return (error);
hc = (struct ar_hardc *)device_get_softc(device);
if((error = ar_allocate_ioport(device, 0, ARC_IO_SIZ))) {
return (ENXIO);
}
/*
* Now see if the card is realy there.
*
* XXX For now I just check the undocumented ports
* for "570". We will probably have to do more checking.
*/
if((ar_inb(hc, AR_ID_5) != '5') ||
(ar_inb(hc, AR_ID_7) != '7') ||
(ar_inb(hc, AR_ID_0) != '0')) {
ar_deallocate_resources(device);
return (ENXIO);
}
membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
memsize = ar_inb(hc, AR_REV);
memsize = 1 << ((memsize & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
memsize *= ARC_WIN_SIZ;
error = bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize);
ar_deallocate_resources(device);
return (error);
}
/*
* Malloc memory for the softc structures.
* Reset the card to put it in a known state.
* Register the ports on the adapter.
* Fill in the info for each port.
* Attach each port to sppp and bpf.
*/
static int
ar_isa_attach(device_t device)
{
u_int tmp;
u_long irq, junk;
struct ar_hardc *hc;
hc = (struct ar_hardc *)device_get_softc(device);
if(ar_allocate_ioport(device, 0, ARC_IO_SIZ))
return (ENXIO);
tmp = ar_inb(hc, AR_BMI);
hc->bustype = tmp & AR_BUS_MSK;
hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
hc->memsize = 1 << hc->memsize;
hc->memsize <<= 16;
hc->interface[0] = (tmp & AR_IFACE_MSK);
hc->interface[1] = hc->interface[0];
hc->interface[2] = hc->interface[0];
hc->interface[3] = hc->interface[0];
tmp = ar_inb(hc, AR_REV);
hc->revision = tmp & AR_REV_MSK;
hc->winsize = 1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
hc->winsize *= ARC_WIN_SIZ;
hc->winmsk = hc->winsize - 1;
hc->numports = ar_inb(hc, AR_PNUM);
hc->handshake = ar_inb(hc, AR_HNDSH);
if(ar_allocate_memory(device, 0, hc->winsize))
return (ENXIO);
hc->mem_start = rman_get_virtual(hc->res_memory);
hc->mem_end = hc->mem_start + hc->winsize;
hc->cunit = device_get_unit(device);
switch(hc->interface[0]) {
case AR_IFACE_EIA_232:
printf("ar%d: The EIA 232 interface is not supported.\n",
hc->cunit);
ar_deallocate_resources(device);
return (ENXIO);
case AR_IFACE_V_35:
break;
case AR_IFACE_EIA_530:
printf("ar%d: WARNING: The EIA 530 interface is untested.\n",
hc->cunit);
break;
case AR_IFACE_X_21:
break;
case AR_IFACE_COMBO:
printf("ar%d: WARNING: The COMBO interface is untested.\n",
hc->cunit);
break;
}
/*
* Do a little sanity check.
*/
if((hc->numports > NPORT) || (hc->memsize > (512*1024))) {
ar_deallocate_resources(device);
return (ENXIO);
}
if(ar_allocate_irq(device, 0, 1))
return (ENXIO);
if(bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
ar_deallocate_resources(device);
return (ENXIO);
}
hc->isa_irq = irq;
if(ar_attach(device)) {
ar_deallocate_resources(device);
return (ENXIO);
}
return (0);
}
/*
********************************* END ************************************
*/