NetBSD/sys/dev/ofisa/com_ofisa.c

166 lines
4.8 KiB
C

/* $NetBSD: com_ofisa.c,v 1.14 2008/04/08 20:11:36 cegger Exp $ */
/*
* Copyright 1997, 1998
* Digital Equipment Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and conditions.
* Subject to these conditions, you may download, copy, install,
* use, modify and distribute this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions as
* they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
* Digital Equipment Corporation. Neither the "Digital Equipment
* Corporation" name nor any trademark or logo of Digital Equipment
* Corporation may be used to endorse or promote products derived
* from this software without the prior written permission of
* Digital Equipment Corporation.
*
* 3) This software is provided "AS-IS" and any express or implied
* warranties, including but not limited to, any implied warranties
* of merchantability, fitness for a particular purpose, or
* non-infringement are disclaimed. In no event shall DIGITAL be
* liable for any damages whatsoever, and in particular, DIGITAL
* shall not be liable for special, indirect, consequential, or
* incidental damages or damages for lost profits, loss of
* revenue or loss of use, whether such damages arise in contract,
* negligence, tort, under statute, in equity, at law or otherwise,
* even if advised of the possibility of such damage.
*/
/*
* OFW Attachment for 'com' serial driver
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com_ofisa.c,v 1.14 2008/04/08 20:11:36 cegger Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/intr.h>
#include <sys/bus.h>
#include <dev/ofw/openfirm.h>
#include <dev/isa/isavar.h>
#include <dev/ofisa/ofisavar.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
struct com_ofisa_softc {
struct com_softc sc_com; /* real "com" softc */
/* OFW ISA-specific goo. */
void *sc_ih; /* interrupt handler */
};
int com_ofisa_probe(device_t, cfdata_t , void *);
void com_ofisa_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(com_ofisa, sizeof(struct com_ofisa_softc),
com_ofisa_probe, com_ofisa_attach, NULL, NULL);
int
com_ofisa_probe(device_t parent, cfdata_t cf, void *aux)
{
struct ofisa_attach_args *aa = aux;
static const char *const compatible_strings[] = { "pnpPNP,501", NULL };
int rv = 0;
if (of_compatible(aa->oba.oba_phandle, compatible_strings) != -1)
rv = 5;
#ifdef _COM_OFISA_MD_MATCH
if (!rv)
rv = com_ofisa_md_match(parent, cf, aux);
#endif
return (rv);
}
void
com_ofisa_attach(device_t parent, device_t self, void *aux)
{
struct com_ofisa_softc *osc = device_private(self);
struct com_softc *sc = &osc->sc_com;
struct ofisa_attach_args *aa = aux;
struct ofisa_reg_desc reg;
struct ofisa_intr_desc intr;
bus_space_handle_t ioh;
bus_space_tag_t iot;
bus_addr_t iobase;
int freq;
char freqbuf[4];
int n;
sc->sc_dev = self;
/*
* We're living on an ofw. We have to ask the OFW what our
* registers and interrupts properties look like.
*
* We expect exactly one register region and one interrupt.
*/
n = ofisa_reg_get(aa->oba.oba_phandle, &reg, 1);
#ifdef _COM_OFISA_MD_REG_FIXUP
n = com_ofisa_md_reg_fixup(parent, self, aux, &reg, 1, n);
#endif
if (n != 1) {
aprint_error(": error getting register data\n");
return;
}
if (reg.len != 8) {
aprint_error(": weird register size (%lu, expected 8)\n",
(unsigned long)reg.len);
return;
}
n = ofisa_intr_get(aa->oba.oba_phandle, &intr, 1);
#ifdef _COM_OFISA_MD_INTR_FIXUP
n = com_ofisa_md_intr_fixup(parent, self, aux, &intr, 1, n);
#endif
if (n != 1) {
aprint_error(": error getting interrupt data\n");
return;
}
if (OF_getproplen(aa->oba.oba_phandle, "clock-frequency") != 4 ||
OF_getprop(aa->oba.oba_phandle, "clock-frequency", freqbuf,
sizeof freqbuf) != 4)
freq = COM_FREQ;
else
freq = of_decode_int(&freqbuf[0]);
iot = (reg.type == OFISA_REG_TYPE_IO) ? aa->iot : aa->memt;
iobase = reg.addr;
sc->sc_frequency = freq;
if (!com_is_console(iot, iobase, &ioh) &&
bus_space_map(iot, iobase, reg.len, 0, &ioh)) {
aprint_error(": can't map register space\n");
return;
}
COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
osc->sc_ih = isa_intr_establish(aa->ic, intr.irq, intr.share,
IPL_SERIAL, comintr, sc);
com_attach_subr(sc);
#if 0
printf("%s: registers: ", device_xname(&sc->sc_dev));
ofisa_reg_print(&reg, 1);
printf("\n");
printf("%s: interrupts: ", device_xname(&sc->sc_dev));
ofisa_intr_print(&intr, 1);
printf("\n");
#endif
}