NetBSD-5.0.2/sys/arch/acorn26/podulebus/podulebus.c
/* $NetBSD: podulebus.c,v 1.15 2006/09/30 16:30:10 bjh21 Exp $ */
/*-
* Copyright (c) 2000 Ben Harris
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: podulebus.c,v 1.15 2006/09/30 16:30:10 bjh21 Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/irq.h>
#include <machine/machdep.h>
#include <machine/memcreg.h>
#include <arch/acorn26/iobus/iocreg.h>
#include <arch/acorn26/iobus/iocvar.h>
#include <dev/podulebus/podulebus.h>
#include <arch/acorn26/podulebus/podulebusreg.h>
#include "locators.h"
#include "podloader.h"
#include "unixbp.h"
#if NUNIXBP > 0
#include <arch/acorn26/podulebus/unixbpvar.h>
#endif
static int podulebus_match(struct device *, struct cfdata *, void *);
static void podulebus_attach(struct device *, struct device *, void *);
static void podulebus_probe_podule(struct device *, int);
static int podulebus_print(void *, char const *);
static int podulebus_submatch(struct device *, struct cfdata *,
const int *, void *);
static void podulebus_read_chunks(struct podulebus_attach_args *, int);
static u_int8_t *podulebus_get_chunk(struct podulebus_attach_args *pa, int type);
#if NPODLOADER > 0
void podloader_read_region(struct podulebus_attach_args *pa, u_int src,
u_int8_t *dest, size_t length);
extern register_t _podloader_call(register_t, register_t, register_t,
void *, int);
#endif
struct podulebus_softc {
struct device sc_dev;
struct ioc_attach_args sc_ioc;
};
CFATTACH_DECL(podulebus, sizeof(struct podulebus_softc),
podulebus_match, podulebus_attach, NULL, NULL);
/* ARGSUSED */
static int
podulebus_match(struct device *parent, struct cfdata *cf, void *aux)
{
/* We can't usefully probe for this */
return 1;
}
static void
podulebus_attach(struct device *parent, struct device *self, void *aux)
{
int i;
struct podulebus_softc *sc = (struct podulebus_softc *)self;
struct ioc_attach_args *ioc = aux;
sc->sc_ioc = *ioc;
printf("\n");
/* Iterate over the podules attaching them */
for (i = 0; i < MAX_PODULES; i++)
podulebus_probe_podule(self, i);
}
static void
podulebus_probe_podule(struct device *self, int slotnum)
{
struct podulebus_softc *sc = (struct podulebus_softc *)self;
bus_space_tag_t id_bst;
bus_space_handle_t id_bsh;
int ecid, w;
u_int8_t extecid[EXTECID_SIZE];
struct podulebus_attach_args pa;
bzero(&pa, sizeof(pa));
id_bst = sc->sc_ioc.ioc_sync_t;
bus_space_subregion(id_bst, sc->sc_ioc.ioc_sync_h,
slotnum * PODULE_GAP, PODULE_GAP, &id_bsh);
ecid = bus_space_read_1(id_bst, id_bsh, 0);
/* Skip empty or strange slots */
if (ecid & (ECID_NOTPRESENT | ECID_NONCONF))
return;
if ((ecid & ECID_ID_MASK) == ECID_ID_EXTEND) {
pa.pa_fast_t = sc->sc_ioc.ioc_fast_t;
bus_space_subregion(pa.pa_fast_t, sc->sc_ioc.ioc_fast_h,
slotnum * PODULE_GAP, PODULE_GAP,
&pa.pa_fast_h);
pa.pa_medium_t = sc->sc_ioc.ioc_medium_t;
bus_space_subregion(pa.pa_medium_t, sc->sc_ioc.ioc_medium_h,
slotnum * PODULE_GAP, PODULE_GAP,
&pa.pa_medium_h);
pa.pa_slow_t = sc->sc_ioc.ioc_slow_t;
bus_space_subregion(pa.pa_slow_t, sc->sc_ioc.ioc_slow_h,
slotnum * PODULE_GAP, PODULE_GAP,
&pa.pa_slow_h);
pa.pa_sync_t = sc->sc_ioc.ioc_sync_t;
bus_space_subregion(pa.pa_sync_t, sc->sc_ioc.ioc_sync_h,
slotnum * PODULE_GAP, PODULE_GAP,
&pa.pa_sync_h);
/* XXX This is a hack! */
pa.pa_mod_t = &iobus_bs_tag;
bus_space_map(pa.pa_mod_t,
(bus_addr_t)MEMC_IO_BASE + slotnum * (PODULE_GAP << 2),
(PODULE_GAP << 2), 0, &pa.pa_mod_h);
bus_space_read_region_1(id_bst, id_bsh, 0,
extecid, EXTECID_SIZE);
/* XXX If you thought that was a hack... */
pa.pa_mod_base = pa.pa_mod_h;
pa.pa_fast_base = pa.pa_fast_h;
pa.pa_medium_base = pa.pa_medium_h;
pa.pa_slow_base = pa.pa_slow_h;
pa.pa_sync_base = pa.pa_sync_h;
pa.pa_ecid = ecid;
pa.pa_flags1 = extecid[EXTECID_F1];
pa.pa_manufacturer = (extecid[EXTECID_MLO] |
extecid[EXTECID_MHI] << 8);
pa.pa_product = (extecid[EXTECID_PLO] |
extecid[EXTECID_PHI] << 8);
pa.pa_slotnum = slotnum;
pa.pa_ih = slotnum;
if (pa.pa_flags1 & EXTECID_F1_CD) {
w = pa.pa_flags1 & EXTECID_F1_W_MASK;
if (w != EXTECID_F1_W_8BIT) {
/* RISC OS 3 can't handle this either. */
printf("%s:%d: ROM is not 8 bits wide; "
"ignoring it\n",
self->dv_xname, pa.pa_slotnum);
} else {
podulebus_read_chunks(&pa, 0);
pa.pa_descr = podulebus_get_chunk(&pa,
CHUNK_DEV_DESCR);
}
}
pa.pa_slotflags = 0;
config_found_sm_loc(self, "podulebus", NULL, &pa,
podulebus_print, podulebus_submatch);
if (pa.pa_chunks)
FREE(pa.pa_chunks, M_DEVBUF);
if (pa.pa_descr)
FREE(pa.pa_descr, M_DEVBUF);
if (pa.pa_loader)
FREE(pa.pa_loader, M_DEVBUF);
} else
printf("%s:%d: non-extended podule ignored.\n",
self->dv_xname, slotnum);
}
static void
podulebus_read_chunks(struct podulebus_attach_args *pa, int useloader)
{
u_int8_t chunk[8];
u_int ptr, nchunks, type, length, offset;
nchunks = pa->pa_nchunks;
if (useloader)
ptr = 0;
else
ptr = EXTECID_SIZE + IRQPTR_SIZE;
for (;;) {
#if NPODLOADER > 0
if (useloader)
podloader_read_region(pa, ptr, chunk, 8);
else
#endif
bus_space_read_region_1(pa->pa_sync_t, pa->pa_sync_h,
ptr, chunk, 8);
ptr += 8;
type = chunk[0];
length = chunk[1] | chunk[2] << 8 | chunk[3] << 16;
if (length == 0)
break;
offset = chunk[4] | chunk[5] << 8 |
chunk[6] << 16 | chunk[7] << 24;
if ((offset + length) > PODULE_GAP)
continue;
nchunks++;
pa->pa_chunks = realloc(pa->pa_chunks,
nchunks * sizeof(*pa->pa_chunks),
M_DEVBUF, M_WAITOK);
pa->pa_chunks[nchunks-1].pc_type = type;
pa->pa_chunks[nchunks-1].pc_length = length;
pa->pa_chunks[nchunks-1].pc_offset = offset;
pa->pa_chunks[nchunks-1].pc_useloader = useloader;
}
pa->pa_nchunks = nchunks;
}
static u_int8_t *
podulebus_get_chunk(struct podulebus_attach_args *pa, int type)
{
int i;
struct podulebus_chunk *pc;
u_int8_t *chunk;
for (i = 0; i < pa->pa_nchunks; i++) {
pc = &pa->pa_chunks[i];
if (pc->pc_type == type) {
chunk = malloc( pc->pc_length + 1, M_DEVBUF, M_WAITOK);
#if NPODLOADER > 0
if (pc->pc_useloader)
podloader_read_region(pa, pc->pc_offset, chunk,
pc->pc_length);
else
#endif
bus_space_read_region_1(pa->pa_sync_t,
pa->pa_sync_h, pc->pc_offset, chunk,
pc->pc_length);
chunk[pc->pc_length] = 0;
return chunk;
}
}
return NULL;
}
#if NPODLOADER > 0
int
podulebus_initloader(struct podulebus_attach_args *pa)
{
if (pa->pa_loader != NULL)
return 0;
pa->pa_loader = podulebus_get_chunk(pa, CHUNK_RISCOS_LOADER);
if (pa->pa_loader == NULL)
return -1;
podulebus_read_chunks(pa, 1);
if (pa->pa_descr)
FREE(pa->pa_descr, M_DEVBUF);
pa->pa_descr = podulebus_get_chunk(pa, CHUNK_DEV_DESCR);
return 0;
}
static register_t
podloader_call(register_t r0, register_t r1, register_t r11, void *loader,
int entry)
{
int s;
register_t result;
s = splhigh();
result = _podloader_call(r0, r1, r11, loader, entry);
splx(s);
return result;
}
int
podloader_readbyte(struct podulebus_attach_args *pa, u_int addr)
{
return podloader_call(0, addr, pa->pa_sync_base, pa->pa_loader, 0);
}
void
podloader_writebyte(struct podulebus_attach_args *pa, u_int addr, int val)
{
podloader_call(val, addr, pa->pa_sync_base, pa->pa_loader, 1);
}
void
podloader_reset(struct podulebus_attach_args *pa)
{
podloader_call(0, 0, pa->pa_sync_base, pa->pa_loader, 2);
}
int
podloader_callloader(struct podulebus_attach_args *pa, u_int r0, u_int r1)
{
return podloader_call(r0, r1, pa->pa_sync_base, pa->pa_loader, 3);
}
void
podloader_read_region(struct podulebus_attach_args *pa, u_int src,
u_int8_t *dest, size_t length)
{
while (length--)
*dest++ = podloader_readbyte(pa, src++);
podloader_reset(pa);
}
#endif
static int
podulebus_print(void *aux, char const *pnp)
{
struct podulebus_attach_args *pa = aux;
char *p, *q;
if (pnp) {
if (pa->pa_descr) {
/* Restrict description to ASCII graphic characters. */
for (p = q = pa->pa_descr; *p != '\0'; p++)
if (*p >= 32 && *p < 126)
*q++ = *p;
*q++ = 0;
aprint_normal("%s", pa->pa_descr);
} else
aprint_normal("podule");
aprint_normal(" <%04x:%04x> at %s",
pa->pa_manufacturer, pa->pa_product, pnp);
}
aprint_normal(" slot %d", pa->pa_slotnum);
return UNCONF;
}
static int
podulebus_submatch(struct device *parent, struct cfdata *cf,
const int *ldesc, void *aux)
{
struct podulebus_attach_args *pa = aux;
if (cf->cf_loc[PODULEBUSCF_SLOT] == PODULEBUSCF_SLOT_DEFAULT ||
cf->cf_loc[PODULEBUSCF_SLOT] == pa->pa_slotnum)
return config_match(parent, cf, aux);
return 0;
}
void *
podulebus_irq_establish(podulebus_intr_handle_t slot, int ipl,
int (*func)(void *), void *arg, struct evcnt *ev)
{
/* XXX: support for checking IRQ bit on podule? */
#if NUNIXBP > 0
if (the_unixbp != NULL)
return irq_establish(IRQ_UNIXBP_BASE + slot, ipl, func, arg,
ev);
#endif
return irq_establish(IRQ_PIRQ, ipl, func, arg, ev);
}
void
podulebus_readcmos(struct podulebus_attach_args *pa, u_int8_t *c)
{
int i;
for (i = 0; i < 4; i++)
c[i] = cmos_read(PODULE_CMOS_BASE +
pa->pa_slotnum * PODULE_CMOS_PERSLOT + i);
}