NetBSD-5.0.2/sys/arch/hp300/dev/frodo.c
/* $NetBSD: frodo.c,v 1.29 2008/04/28 20:23:19 martin Exp $ */
/*-
* Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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) 1997 Michael Smith. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* Support for the "Frodo" (a.k.a. "Apollo Utility") chip found
* in HP Apollo 9000/4xx workstations, as well as
* HP 9000/362 and 9000/382 controllers.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: frodo.c,v 1.29 2008/04/28 20:23:19 martin Exp $");
#define _HP300_INTR_H_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/hp300spu.h>
#include <hp300/dev/intiovar.h>
#include <hp300/dev/frodoreg.h>
#include <hp300/dev/frodovar.h>
/*
* Description of a Frodo interrupt handler.
*/
struct frodo_interhand {
int (*ih_fn)(void *);
void *ih_arg;
int ih_priority;
};
struct frodo_softc {
device_t sc_dev; /* generic device glue */
volatile uint8_t *sc_regs; /* register base */
struct frodo_interhand sc_intr[FRODO_NINTR]; /* interrupt handlers */
int sc_ipl;
void *sc_ih; /* out interrupt cookie */
int sc_refcnt; /* number of interrupt refs */
struct bus_space_tag sc_tag; /* bus space tag */
};
static int frodomatch(device_t, cfdata_t, void *);
static void frodoattach(device_t, device_t, void *);
static int frodoprint(void *, const char *);
static int frodosubmatch(device_t, cfdata_t, const int *, void *);
static int frodointr(void *);
static void frodo_imask(struct frodo_softc *, uint16_t, uint16_t);
CFATTACH_DECL_NEW(frodo, sizeof(struct frodo_softc),
frodomatch, frodoattach, NULL, NULL);
static const struct frodo_device frodo_subdevs[] = {
{ "dnkbd", FRODO_APCI_OFFSET(0), FRODO_INTR_APCI0 },
{ "com", FRODO_APCI_OFFSET(1), FRODO_INTR_APCI1 },
{ "com", FRODO_APCI_OFFSET(2), FRODO_INTR_APCI2 },
{ "com", FRODO_APCI_OFFSET(3), FRODO_INTR_APCI3 },
{ NULL, 0, 0 }
};
static int
frodomatch(device_t parent, cfdata_t cf, void *aux)
{
struct intio_attach_args *ia = aux;
static int frodo_matched = 0;
/* only allow one instance */
if (frodo_matched)
return 0;
if (strcmp(ia->ia_modname, "frodo") != 0)
return 0;
if (badaddr((void *)ia->ia_addr))
return 0;
frodo_matched = 1;
return 1;
}
static void
frodoattach(device_t parent, device_t self, void *aux)
{
struct frodo_softc *sc = device_private(self);
struct intio_attach_args *ia = aux;
bus_space_tag_t bst = &sc->sc_tag;
const struct frodo_device *fd;
struct frodo_attach_args fa;
sc->sc_dev = self;
sc->sc_regs = (volatile uint8_t *)ia->ia_addr;
sc->sc_ipl = ia->ia_ipl;
if ((FRODO_READ(sc, FRODO_IISR) & FRODO_IISR_SERVICE) == 0)
aprint_error(": service mode enabled");
aprint_normal("\n");
/* Initialize bus_space_tag_t for frodo */
frodo_init_bus_space(bst);
/* Clear all of the interrupt handlers. */
memset(sc->sc_intr, 0, sizeof(sc->sc_intr));
sc->sc_refcnt = 0;
/*
* Disable all of the interrupt lines; we reenable them
* as subdevices attach.
*/
frodo_imask(sc, 0, 0xffff);
/* Clear any pending interrupts. */
FRODO_WRITE(sc, FRODO_PIC_PU, 0xff);
FRODO_WRITE(sc, FRODO_PIC_PL, 0xff);
/* Set interrupt polarities. */
FRODO_WRITE(sc, FRODO_PIO_IPR, 0x10);
/* ...and configure for edge triggering. */
FRODO_WRITE(sc, FRODO_PIO_IELR, 0xcf);
/*
* We defer hooking up our interrupt handler until
* a subdevice hooks up theirs.
*/
sc->sc_ih = NULL;
/* ... and attach subdevices. */
for (fd = frodo_subdevs; fd->fd_name != NULL; fd++) {
/*
* Skip the first serial port if we're not a 425e;
* it's mapped to the DCA at select code 9 on all
* other models.
*/
if (fd->fd_offset == FRODO_APCI_OFFSET(1) &&
mmuid != MMUID_425_E)
continue;
fa.fa_name = fd->fd_name;
fa.fa_bst = bst;
fa.fa_base = ia->ia_iobase;
fa.fa_offset = fd->fd_offset;
fa.fa_line = fd->fd_line;
config_found_sm_loc(self, "frodo", NULL, &fa, frodoprint,
frodosubmatch);
}
}
static int
frodosubmatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
struct frodo_attach_args *fa = aux;
if (cf->frodocf_offset != FRODO_UNKNOWN_OFFSET &&
cf->frodocf_offset != fa->fa_offset)
return 0;
return config_match(parent, cf, aux);
}
static int
frodoprint(void *aux, const char *pnp)
{
struct frodo_attach_args *fa = aux;
if (pnp)
aprint_normal("%s at %s", fa->fa_name, pnp);
aprint_normal(" offset 0x%x", fa->fa_offset);
return UNCONF;
}
void
frodo_intr_establish(device_t frdev, int (*func)(void *), void *arg,
int line, int priority)
{
struct frodo_softc *sc = device_private(frdev);
struct hp300_intrhand *ih = sc->sc_ih;
if (line < 0 || line >= FRODO_NINTR) {
aprint_error_dev(frdev, "bad interrupt line %d\n", line);
goto lose;
}
if (sc->sc_intr[line].ih_fn != NULL) {
aprint_error_dev(frdev, "interrupt line %d already used\n",
line);
goto lose;
}
/* Install the handler. */
sc->sc_intr[line].ih_fn = func;
sc->sc_intr[line].ih_arg = arg;
sc->sc_intr[line].ih_priority = priority;
/*
* If this is the first one, establish the frodo
* interrupt handler. If not, reestablish at a
* higher priority if necessary.
*/
if (ih == NULL || ih->ih_priority < priority) {
if (ih != NULL)
intr_disestablish(ih);
sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, priority);
}
sc->sc_refcnt++;
/* Enable the interrupt line. */
frodo_imask(sc, (1 << line), 0);
return;
lose:
panic("frodo_intr_establish");
}
void
frodo_intr_disestablish(device_t frdev, int line)
{
struct frodo_softc *sc = device_private(frdev);
struct hp300_intrhand *ih = sc->sc_ih;
int newpri;
if (sc->sc_intr[line].ih_fn == NULL) {
printf("%s: no handler for line %d\n",
device_xname(sc->sc_dev), line);
panic("frodo_intr_disestablish");
}
sc->sc_intr[line].ih_fn = NULL;
frodo_imask(sc, 0, (1 << line));
/* If this was the last, unhook ourselves. */
if (sc->sc_refcnt-- == 1) {
intr_disestablish(ih);
return;
}
/* Lower our priority, if appropriate. */
for (newpri = 0, line = 0; line < FRODO_NINTR; line++)
if (sc->sc_intr[line].ih_fn != NULL &&
sc->sc_intr[line].ih_priority > newpri)
newpri = sc->sc_intr[line].ih_priority;
if (newpri != ih->ih_priority) {
intr_disestablish(ih);
sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, newpri);
}
}
static int
frodointr(void *arg)
{
struct frodo_softc *sc = arg;
struct frodo_interhand *fih;
int line, taken = 0;
/* Any interrupts pending? */
if (FRODO_GETPEND(sc) == 0)
return 0;
do {
/*
* Get pending interrupt; this also clears it for us.
*/
line = FRODO_IPEND(sc);
fih = &sc->sc_intr[line];
if (fih->ih_fn == NULL ||
(*fih->ih_fn)(fih->ih_arg) == 0)
printf("%s: spurious interrupt on line %d\n",
device_xname(sc->sc_dev), line);
if (taken++ > 100)
panic("frodointr: looping!");
} while (FRODO_GETPEND(sc) != 0);
return 1;
}
static void
frodo_imask(struct frodo_softc *sc, uint16_t set, uint16_t clear)
{
uint16_t imask;
imask = FRODO_GETMASK(sc);
imask |= set;
imask &= ~clear;
FRODO_SETMASK(sc, imask);
}
/*
* frodo chip specific bus_space(9) support functions.
*/
static uint8_t frodo_bus_space_read_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t);
static void frodo_bus_space_write_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t, uint8_t);
static void frodo_bus_space_read_multi_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t);
static void frodo_bus_space_write_multi_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t);
static void frodo_bus_space_read_region_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t, uint8_t *, bus_size_t);
static void frodo_bus_space_write_region_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t, const uint8_t *, bus_size_t);
static void frodo_bus_space_set_multi_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t, uint8_t, bus_size_t);
static void frodo_bus_space_set_region_sparse_1(bus_space_tag_t,
bus_space_handle_t, bus_size_t, uint8_t, bus_size_t);
/*
* frodo_init_bus_space():
* Initialize bus_space functions in bus_space_tag_t
* for frodo devices which have sparse address space.
*/
void
frodo_init_bus_space(bus_space_tag_t bst)
{
memset(bst, 0, sizeof(struct bus_space_tag));
bst->bustype = HP300_BUS_SPACE_INTIO;
bst->bsr1 = frodo_bus_space_read_sparse_1;
bst->bsw1 = frodo_bus_space_write_sparse_1;
bst->bsrm1 = frodo_bus_space_read_multi_sparse_1;
bst->bswm1 = frodo_bus_space_write_multi_sparse_1;
bst->bsrr1 = frodo_bus_space_read_region_sparse_1;
bst->bswr1 = frodo_bus_space_write_region_sparse_1;
bst->bssm1 = frodo_bus_space_set_multi_sparse_1;
bst->bssr1 = frodo_bus_space_set_region_sparse_1;
}
static uint8_t
frodo_bus_space_read_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh,
bus_size_t offset)
{
return *(volatile uint8_t *)(bsh + (offset << 2));
}
static void
frodo_bus_space_write_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh,
bus_size_t offset, uint8_t val)
{
*(volatile uint8_t *)(bsh + (offset << 2)) = val;
}
static void
frodo_bus_space_read_multi_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh,
bus_size_t offset, uint8_t *addr, bus_size_t len)
{
__asm volatile (
" movl %0,%%a0 ;\n"
" movl %1,%%a1 ;\n"
" movl %2,%%d0 ;\n"
"1: movb %%a0@,%%a1@+ ;\n"
" subql #1,%%d0 ;\n"
" jne 1b"
:
: "r" (bsh + (offset << 2)), "g" (addr), "g" (len)
: "%a0","%a1","%d0");
}
static void
frodo_bus_space_write_multi_sparse_1(bus_space_tag_t bst,
bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr,
bus_size_t len)
{
__asm volatile (
" movl %0,%%a0 ;\n"
" movl %1,%%a1 ;\n"
" movl %2,%%d0 ;\n"
"1: movb %%a1@+,%%a0@ ;\n"
" subql #1,%%d0 ;\n"
" jne 1b"
:
: "r" (bsh + (offset << 2)), "g" (addr), "g" (len)
: "%a0","%a1","%d0");
}
static void
frodo_bus_space_read_region_sparse_1(bus_space_tag_t bst,
bus_space_handle_t bsh, bus_size_t offset, uint8_t *addr, bus_size_t len)
{
__asm volatile (
" movl %0,%%a0 ;\n"
" movl %1,%%a1 ;\n"
" movl %2,%%d0 ;\n"
"1: movb %%a0@,%%a1@+ ;\n"
" addql #4,%%a0 ;\n"
" subql #1,%%d0 ;\n"
" jne 1b"
:
: "r" (bsh + (offset << 2)), "g" (addr), "g" (len)
: "%a0","%a1","%d0");
}
static void
frodo_bus_space_write_region_sparse_1(bus_space_tag_t bst,
bus_space_handle_t bsh, bus_size_t offset, const uint8_t *addr,
bus_size_t len)
{
__asm volatile (
" movl %0,%%a0 ;\n"
" movl %1,%%a1 ;\n"
" movl %2,%%d0 ;\n"
"1: movb %%a1@+,%%a0@ ;\n"
" addql #4,%%a0 ;\n"
" subql #1,%%d0 ;\n"
" jne 1b"
:
: "r" (bsh + (offset << 2)), "g" (addr), "g" (len)
: "%a0","%a1","%d0");
}
static void
frodo_bus_space_set_multi_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh,
bus_size_t offset, uint8_t val, bus_size_t count)
{
__asm volatile (
" movl %0,%%a0 ;\n"
" movl %1,%%d1 ;\n"
" movl %2,%%d0 ;\n"
"1: movb %%d1,%%a0@ ;\n"
" subql #1,%%d0 ;\n"
" jne 1b"
:
: "r" (bsh + (offset << 2)), "g" (val), "g" (count)
: "%a0","%d0","%d1");
}
static void
frodo_bus_space_set_region_sparse_1(bus_space_tag_t bst, bus_space_handle_t bsh,
bus_size_t offset, uint8_t val, bus_size_t count)
{
__asm volatile (
" movl %0,%%a0 ;\n"
" movl %1,%%d1 ;\n"
" movl %2,%%d0 ;\n"
"1: movb %%d1,%%a0@ ;\n"
" addql #4,%%a0 ;\n"
" subql #1,%%d0 ;\n"
" jne 1b"
:
: "r" (bsh + (offset << 2)), "g" (val), "g" (count)
: "%a0","%d0","%d1");
}