NetBSD/sys/dev/isa/com_isa.c

337 lines
9.5 KiB
C

/* $NetBSD: com_isa.c,v 1.39 2010/02/24 22:37:58 dyoung Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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.
*
* 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) 1991 The Regents of the University of California.
* 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 University 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 REGENTS 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 REGENTS 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.
*
* @(#)com.c 7.5 (Berkeley) 5/16/91
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com_isa.c,v 1.39 2010/02/24 22:37:58 dyoung Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/bus.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#ifdef COM_HAYESP
#include <dev/ic/hayespreg.h>
#endif
#include <dev/isa/isavar.h>
struct com_isa_softc {
struct com_softc sc_com; /* real "com" softc */
/* ISA-specific goo. */
isa_chipset_tag_t sc_ic;
void *sc_ih; /* interrupt handler */
int sc_irq;
};
static bool com_isa_suspend(device_t, const pmf_qual_t *);
static bool com_isa_resume(device_t, const pmf_qual_t *);
int com_isa_probe(device_t, cfdata_t , void *);
void com_isa_attach(device_t, device_t, void *);
static int com_isa_detach(device_t, int);
#ifdef COM_HAYESP
int com_isa_isHAYESP(bus_space_handle_t, struct com_softc *);
#endif
CFATTACH_DECL3_NEW(com_isa, sizeof(struct com_isa_softc),
com_isa_probe, com_isa_attach, com_isa_detach, NULL,
NULL, NULL, DVF_DETACH_SHUTDOWN);
int
com_isa_probe(device_t parent, cfdata_t match, void *aux)
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;
int rv = 1;
struct isa_attach_args *ia = aux;
if (ia->ia_nio < 1)
return (0);
if (ia->ia_nirq < 1)
return (0);
if (ISA_DIRECT_CONFIG(ia))
return (0);
/* Disallow wildcarded i/o address. */
if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
return (0);
/* Don't allow wildcarded IRQ. */
if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
return (0);
iot = ia->ia_iot;
iobase = ia->ia_io[0].ir_addr;
/* if it's in use as console, it's there. */
if (!com_is_console(iot, iobase, 0)) {
if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
return 0;
}
rv = comprobe1(iot, ioh);
bus_space_unmap(iot, ioh, COM_NPORTS);
}
if (rv) {
ia->ia_nio = 1;
ia->ia_io[0].ir_size = COM_NPORTS;
ia->ia_nirq = 1;
ia->ia_niomem = 0;
ia->ia_ndrq = 0;
}
return (rv);
}
void
com_isa_attach(device_t parent, device_t self, void *aux)
{
struct com_isa_softc *isc = device_private(self);
struct com_softc *sc = &isc->sc_com;
int iobase, irq;
bus_space_tag_t iot;
bus_space_handle_t ioh;
struct isa_attach_args *ia = aux;
#ifdef COM_HAYESP
int hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 };
int *hayespp;
#endif
/*
* We're living on an isa.
*/
iobase = ia->ia_io[0].ir_addr;
iot = ia->ia_iot;
if (!com_is_console(iot, iobase, &ioh) &&
bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
printf(": can't map i/o space\n");
return;
}
sc->sc_dev = self;
COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
sc->sc_frequency = COM_FREQ;
irq = ia->ia_irq[0].ir_irq;
#ifdef COM_HAYESP
for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) {
bus_space_handle_t hayespioh;
#define HAYESP_NPORTS 8
if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh))
continue;
if (com_isa_isHAYESP(hayespioh, sc)) {
break;
}
bus_space_unmap(iot, hayespioh, HAYESP_NPORTS);
}
#endif
com_attach_subr(sc);
if (!pmf_device_register1(self, com_isa_suspend, com_isa_resume,
com_cleanup))
aprint_error_dev(self, "couldn't establish power handler\n");
isc->sc_ic = ia->ia_ic;
isc->sc_irq = irq;
isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL,
comintr, sc);
}
static bool
com_isa_suspend(device_t self, const pmf_qual_t *qual)
{
struct com_isa_softc *isc = device_private(self);
if (!com_suspend(self, qual))
return false;
isa_intr_disestablish(isc->sc_ic, isc->sc_ih);
isc->sc_ih = NULL;
return true;
}
static bool
com_isa_resume(device_t self, const pmf_qual_t *qual)
{
struct com_isa_softc *isc = device_private(self);
struct com_softc *sc = &isc->sc_com;
isc->sc_ih = isa_intr_establish(isc->sc_ic, isc->sc_irq, IST_EDGE,
IPL_SERIAL, comintr, sc);
return com_resume(self, qual);
}
static int
com_isa_detach(device_t self, int flags)
{
struct com_isa_softc *isc = device_private(self);
struct com_softc *sc = &isc->sc_com;
const struct com_regs *cr = &sc->sc_regs;
int rc;
if ((rc = com_detach(self, flags)) != 0)
return rc;
if (isc->sc_ih != NULL)
isa_intr_disestablish(isc->sc_ic, isc->sc_ih);
pmf_device_deregister(self);
com_cleanup(self, 0);
#ifdef COM_HAYESP
if (sc->sc_type == COM_TYPE_HAYESP)
bus_space_unmap(cr->cr_iot, sc->sc_hayespioh, HAYESP_NPORTS);
#endif
bus_space_unmap(cr->cr_iot, cr->cr_ioh, COM_NPORTS);
return 0;
}
#ifdef COM_HAYESP
int
com_isa_isHAYESP(bus_space_handle_t hayespioh, struct com_softc *sc)
{
char val, dips;
int combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
bus_space_tag_t iot = sc->sc_regs.cr_iot;
/*
* Hayes ESP cards have two iobases. One is for compatibility with
* 16550 serial chips, and at the same ISA PC base addresses. The
* other is for ESP-specific enhanced features, and lies at a
* different addressing range entirely (0x140, 0x180, 0x280, or 0x300).
*/
/* Test for ESP signature */
if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0)
return (0);
/*
* ESP is present at ESP enhanced base address; unknown com port
*/
/* Get the dip-switch configurations */
bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS);
dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1);
/* Determine which com port this ESP card services: bits 0,1 of */
/* dips is the port # (0-3); combaselist[val] is the com_iobase */
if (sc->sc_regs.cr_iobase != combaselist[dips & 0x03])
return (0);
printf(": ESP");
/* Check ESP Self Test bits. */
/* Check for ESP version 2.0: bits 4,5,6 == 010 */
bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST);
val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg1 */
val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2);
if ((val & 0x70) < 0x20) {
printf("-old (%o)", val & 0x70);
/* we do not support the necessary features */
return (0);
}
/* Check for ability to emulate 16550: bit 8 == 1 */
if ((dips & 0x80) == 0) {
printf(" slave");
/* XXX Does slave really mean no 16550 support?? */
return (0);
}
/*
* If we made it this far, we are a full-featured ESP v2.0 (or
* better), at the correct com port address.
*/
sc->sc_type = COM_TYPE_HAYESP;
sc->sc_hayespioh = hayespioh;
sc->sc_fifolen = 1024;
sc->sc_prescaler = 0; /* set prescaler to x1. */
printf(", 1024 byte fifo\n");
return (1);
}
#endif