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/* $OpenBSD: sti_sgc.c,v 1.4 2005/12/30 18:03:33 miod Exp $ */
/*
* Copyright (c) 2005, Miodrag Vallat
*
* 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 AUTHOR ``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 AUTHOR 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/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <dev/cons.h>
#include <hp300/dev/sgcreg.h>
#include <hp300/dev/sgcvar.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/ic/stireg.h>
#include <dev/ic/stivar.h>
#include <uvm/uvm_extern.h>
int sti_sgc_match(struct device *, void *, void *);
void sti_sgc_attach(struct device *, struct device *, void *);
struct cfattach sti_sgc_ca = {
sizeof(struct sti_softc), sti_sgc_match, sti_sgc_attach
};
int
sti_sgc_match(struct device *parent, void *match, void *aux)
{
struct sgc_attach_args *saa = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
int devtype;
/*
* If we already probed it succesfully as a console device, go ahead,
* since we will not be able to bus_space_map() again.
*/
if (SGC_SLOT_TO_CONSCODE(saa->saa_slot) == conscode)
return (1);
iot = HP300_BUS_TAG(HP300_BUS_SGC, saa->saa_slot);
if (bus_space_map(iot, (bus_addr_t)sgc_slottopa(saa->saa_slot),
PAGE_SIZE, 0, &ioh))
return (0);
devtype = bus_space_read_1(iot, ioh, 3);
bus_space_unmap(iot, ioh, PAGE_SIZE);
/*
* This might not be reliable enough. On the other hand, non-STI
* SGC cards will apparently not initialize in an hp300, to the
* point of not even answering bus probes (checked with an
* Harmony/FDDI SGC card).
*/
if (devtype != STI_DEVTYPE1 && devtype != STI_DEVTYPE4)
return (0);
return (1);
}
void
sti_sgc_attach(struct device *parent, struct device *self, void *aux)
{
struct sti_softc *sc = (void *)self;
struct sgc_attach_args *saa = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
int devtype;
u_int32_t romend;
/*
* If we already probed it succesfully as a console device, go ahead,
* since we will not be able to bus_space_map() again.
*/
if (SGC_SLOT_TO_CONSCODE(saa->saa_slot) == conscode) {
extern struct sti_screen stifb_cn;
sc->sc_flags |= STI_CONSOLE | STI_ATTACHED;
sc->sc_scr = &stifb_cn;
sti_describe(sc);
} else {
iot = HP300_BUS_TAG(HP300_BUS_SGC, saa->saa_slot);
sc->base = (bus_addr_t)sgc_slottopa(saa->saa_slot);
if (bus_space_map(iot, sc->base, PAGE_SIZE, 0, &ioh)) {
printf(": can't map frame buffer");
return;
}
/*
* Compute real PROM size
*/
devtype = bus_space_read_1(iot, ioh, 3);
if (devtype == STI_DEVTYPE4) {
romend = bus_space_read_4(iot, ioh, 0x18);
} else {
romend =
(bus_space_read_1(iot, ioh, 0x50 + 3) << 24) |
(bus_space_read_1(iot, ioh, 0x50 + 7) << 16) |
(bus_space_read_1(iot, ioh, 0x50 + 11) << 8) |
(bus_space_read_1(iot, ioh, 0x50 + 15));
}
bus_space_unmap(iot, ioh, PAGE_SIZE);
if (bus_space_map(iot, sc->base, round_page(romend), 0,
&ioh)) {
printf(": can't map frame buffer");
return;
}
sc->memt = sc->iot = iot;
sc->romh = ioh;
sti_attach_common(sc, STI_CODEBASE_M68K);
}
sti_end_attach(sc);
}
/*
* Console code
*/
int sti_console_scan(int, caddr_t, void *);
cons_decl(sti);
int
sti_console_scan(int slot, caddr_t va, void *arg)
{
struct consdev *cp = arg;
bus_space_tag_t iot;
bus_space_handle_t ioh;
int force = 0, pri;
int devtype;
iot = HP300_BUS_TAG(HP300_BUS_SGC, slot);
if (bus_space_map(iot, (bus_addr_t)sgc_slottopa(slot), PAGE_SIZE, 0,
&ioh))
return (0);
devtype = bus_space_read_1(iot, ioh, 3);
bus_space_unmap(iot, ioh, PAGE_SIZE);
/* XXX this is not reliable enough */
if (devtype != STI_DEVTYPE1 && devtype != STI_DEVTYPE4)
return (0);
pri = CN_INTERNAL;
#ifdef CONSCODE
/*
* Raise our priority, if appropriate.
*/
if (SGC_SLOT_TO_CONSCODE(slot) == CONSCODE) {
pri = CN_REMOTE;
force = conforced = 1;
}
#endif
/* Only raise priority. */
if (pri > cp->cn_pri)
cp->cn_pri = pri;
/*
* If our priority is higher than the currently-remembered
* console, stash our priority.
*/
if (((cn_tab == NULL) || (cp->cn_pri > cn_tab->cn_pri)) || force) {
cn_tab = cp;
conscode = SGC_SLOT_TO_CONSCODE(slot);
return (1);
}
return (0);
}
void
sticnprobe(struct consdev *cp)
{
int maj;
/* Abort early if the console is already forced. */
if (conforced)
return;
for (maj = 0; maj < nchrdev; maj++) {
if (cdevsw[maj].d_open == wsdisplayopen)
break;
}
if (maj == nchrdev)
return;
cp->cn_dev = makedev(maj, 0);
cp->cn_pri = CN_DEAD;
/* Search for an sti device */
console_scan(sti_console_scan, cp, HP300_BUS_SGC);
}
void
sticninit(struct consdev *cp)
{
extern struct sti_screen stifb_cn;
bus_space_tag_t iot;
bus_addr_t base;
/*
* We are not interested by the *first* console pass.
*/
if (consolepass == 0)
return;
iot = HP300_BUS_TAG(HP300_BUS_SGC, CONSCODE_TO_SGC_SLOT(conscode));
base = (bus_addr_t)sgc_slottopa(CONSCODE_TO_SGC_SLOT(conscode));
sti_cnattach(&stifb_cn, iot, base, STI_CODEBASE_M68K);
/*
* Since the copyright notice could not be displayed before,
* display it again now.
*/
printf("%s\n", copyright);
}
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