229 lines
6.1 KiB
C
229 lines
6.1 KiB
C
/*
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* Copyright (c) 1995 - 2001 John Hay. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY John Hay ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL John Hay BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Programming assumptions and other issues.
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*
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* The descriptors of a DMA channel will fit in a 16K memory window.
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*
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* The buffers of a transmit DMA channel will fit in a 16K memory window.
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*
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* Only the ISA bus cards with X.21 and V.35 is tested.
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*
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* When interface is going up, handshaking is set and it is only cleared
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* when the interface is down'ed.
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*
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* There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE,
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* internal/external clock, etc.....
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <machine/bus_pio.h>
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#include <machine/bus_memio.h>
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#include <sys/rman.h>
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#include <isa/isavar.h>
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#include "isa_if.h"
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#include <dev/ic/hd64570.h>
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#include <dev/ar/if_arregs.h>
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#ifdef TRACE
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#define TRC(x) x
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#else
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#define TRC(x)
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#endif
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#define TRCL(x) x
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static int ar_isa_probe (device_t);
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static int ar_isa_attach (device_t);
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static struct isa_pnp_id ar_ids[] = {
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{0, NULL}
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};
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static device_method_t ar_methods[] = {
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DEVMETHOD(device_probe, ar_isa_probe),
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DEVMETHOD(device_attach, ar_isa_attach),
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DEVMETHOD(device_detach, ar_detach),
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{ 0, 0 }
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};
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static driver_t ar_isa_driver = {
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"ar",
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ar_methods,
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sizeof (struct ar_hardc)
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};
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DRIVER_MODULE(ar, isa, ar_isa_driver, ar_devclass, 0, 0);
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MODULE_DEPEND(ar, isa, 1, 1, 1);
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/*
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* Probe to see if it is there.
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* Get its information and fill it in.
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*/
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static int
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ar_isa_probe(device_t device)
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{
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int error;
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u_long membase, memsize;
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struct ar_hardc *hc;
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error = ISA_PNP_PROBE(device_get_parent(device), device, ar_ids);
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if(error == ENXIO || error == 0)
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return (error);
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hc = (struct ar_hardc *)device_get_softc(device);
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if((error = ar_allocate_ioport(device, 0, ARC_IO_SIZ))) {
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return (ENXIO);
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}
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/*
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* Now see if the card is realy there.
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*
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* XXX For now I just check the undocumented ports
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* for "570". We will probably have to do more checking.
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*/
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if((ar_inb(hc, AR_ID_5) != '5') ||
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(ar_inb(hc, AR_ID_7) != '7') ||
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(ar_inb(hc, AR_ID_0) != '0')) {
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ar_deallocate_resources(device);
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return (ENXIO);
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}
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membase = bus_get_resource_start(device, SYS_RES_MEMORY, 0);
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memsize = ar_inb(hc, AR_REV);
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memsize = 1 << ((memsize & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
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memsize *= ARC_WIN_SIZ;
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error = bus_set_resource(device, SYS_RES_MEMORY, 0, membase, memsize);
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ar_deallocate_resources(device);
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return (error);
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}
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/*
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* Malloc memory for the softc structures.
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* Reset the card to put it in a known state.
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* Register the ports on the adapter.
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* Fill in the info for each port.
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* Attach each port to sppp and bpf.
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*/
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static int
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ar_isa_attach(device_t device)
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{
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u_int tmp;
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u_long irq, junk;
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struct ar_hardc *hc;
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hc = (struct ar_hardc *)device_get_softc(device);
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if(ar_allocate_ioport(device, 0, ARC_IO_SIZ))
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return (ENXIO);
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tmp = ar_inb(hc, AR_BMI);
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hc->bustype = tmp & AR_BUS_MSK;
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hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
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hc->memsize = 1 << hc->memsize;
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hc->memsize <<= 16;
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hc->interface[0] = (tmp & AR_IFACE_MSK);
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hc->interface[1] = hc->interface[0];
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hc->interface[2] = hc->interface[0];
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hc->interface[3] = hc->interface[0];
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tmp = ar_inb(hc, AR_REV);
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hc->revision = tmp & AR_REV_MSK;
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hc->winsize = 1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
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hc->winsize *= ARC_WIN_SIZ;
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hc->winmsk = hc->winsize - 1;
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hc->numports = ar_inb(hc, AR_PNUM);
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hc->handshake = ar_inb(hc, AR_HNDSH);
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if(ar_allocate_memory(device, 0, hc->winsize))
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return (ENXIO);
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hc->mem_start = rman_get_virtual(hc->res_memory);
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hc->mem_end = hc->mem_start + hc->winsize;
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hc->cunit = device_get_unit(device);
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switch(hc->interface[0]) {
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case AR_IFACE_EIA_232:
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printf("ar%d: The EIA 232 interface is not supported.\n",
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hc->cunit);
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ar_deallocate_resources(device);
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return (ENXIO);
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case AR_IFACE_V_35:
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break;
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case AR_IFACE_EIA_530:
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printf("ar%d: WARNING: The EIA 530 interface is untested.\n",
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hc->cunit);
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break;
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case AR_IFACE_X_21:
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break;
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case AR_IFACE_COMBO:
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printf("ar%d: WARNING: The COMBO interface is untested.\n",
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hc->cunit);
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break;
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}
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/*
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* Do a little sanity check.
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*/
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if((hc->numports > NPORT) || (hc->memsize > (512*1024))) {
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ar_deallocate_resources(device);
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return (ENXIO);
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}
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if(ar_allocate_irq(device, 0, 1))
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return (ENXIO);
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if(bus_get_resource(device, SYS_RES_IRQ, 0, &irq, &junk)) {
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ar_deallocate_resources(device);
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return (ENXIO);
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}
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hc->isa_irq = irq;
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if(ar_attach(device)) {
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ar_deallocate_resources(device);
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return (ENXIO);
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}
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return (0);
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}
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/*
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********************************* END ************************************
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*/
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