246 lines
7.2 KiB
C
246 lines
7.2 KiB
C
/* $NetBSD: atppc_isa.c,v 1.10 2007/03/04 06:02:10 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2001 Alcove - Nicolas Souchu
|
|
* 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.
|
|
*
|
|
* FreeBSD: src/sys/isa/ppc.c,v 1.26.2.5 2001/10/02 05:21:45 nsouch Exp
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: atppc_isa.c,v 1.10 2007/03/04 06:02:10 christos Exp $");
|
|
|
|
#include "opt_atppc.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <machine/intr.h>
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/isa/isareg.h>
|
|
#include <dev/isa/isavar.h>
|
|
#include <dev/isa/isadmavar.h>
|
|
|
|
#include <dev/ic/atppcreg.h>
|
|
#include <dev/ic/atppcvar.h>
|
|
#include <dev/isa/atppc_isadma.h>
|
|
|
|
/*
|
|
* ISA bus attach code for atppc driver.
|
|
* Note on capabilities: capabilites may exist in the chipset but may not
|
|
* necessarily be useable. I.e. you may specify an IRQ in the autoconfig, but
|
|
* will the port actually have an IRQ assigned to it at the hardware level?
|
|
* How can you test if the capabilites can be used? For interrupts, see if a
|
|
* handler exists (sc_intr != NULL). For DMA, see if the sc_dma_start() and
|
|
* sc_dma_finish() function pointers are not NULL.
|
|
*/
|
|
|
|
/* Configuration data for atppc on isa bus. */
|
|
struct atppc_isa_softc {
|
|
/* Machine independent device data */
|
|
struct atppc_softc sc_atppc;
|
|
|
|
/* IRQ/DRQ/IO Port assignments on ISA bus */
|
|
int sc_irq;
|
|
int sc_drq;
|
|
int sc_iobase;
|
|
|
|
/* ISA chipset tag */
|
|
isa_chipset_tag_t sc_ic;
|
|
};
|
|
|
|
/* Probe and attach functions for a atppc device on the ISA bus. */
|
|
static int atppc_isa_probe(struct device *, struct cfdata *, void *);
|
|
static void atppc_isa_attach(struct device *, struct device *, void *);
|
|
|
|
static int atppc_isa_dma_start(struct atppc_softc *, void *, u_int,
|
|
u_int8_t);
|
|
static int atppc_isa_dma_finish(struct atppc_softc *);
|
|
static int atppc_isa_dma_abort(struct atppc_softc *);
|
|
static int atppc_isa_dma_malloc(struct device *, void **, bus_addr_t *,
|
|
bus_size_t);
|
|
static void atppc_isa_dma_free(struct device *, void **, bus_addr_t *,
|
|
bus_size_t);
|
|
|
|
CFATTACH_DECL(atppc_isa, sizeof(struct atppc_isa_softc), atppc_isa_probe,
|
|
atppc_isa_attach, NULL, NULL);
|
|
|
|
/*
|
|
* Probe function: find parallel port controller on isa bus. Combined from
|
|
* lpt_isa_probe() in lpt.c and atppc_detect_port() from FreeBSD's ppc.c.
|
|
*/
|
|
static int
|
|
atppc_isa_probe(struct device *parent, struct cfdata *cf, void *aux)
|
|
{
|
|
bus_space_handle_t ioh;
|
|
struct isa_attach_args *ia = aux;
|
|
bus_space_tag_t iot = ia->ia_iot;
|
|
int rval = 0;
|
|
|
|
if (ia->ia_nio < 1)
|
|
return (0);
|
|
|
|
/* Disallow wildcarded i/o address */
|
|
if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
|
|
return (0);
|
|
|
|
if (bus_space_map(iot, ia->ia_io[0].ir_addr, IO_LPTSIZE, 0, &ioh))
|
|
return (0);
|
|
|
|
if (atppc_detect_port(iot, ioh) == 0)
|
|
rval = 1;
|
|
|
|
bus_space_unmap(iot, ioh, IO_LPTSIZE);
|
|
|
|
if (rval) {
|
|
ia->ia_nio = 1;
|
|
ia->ia_io[0].ir_size = IO_LPTSIZE;
|
|
ia->ia_nirq = 1;
|
|
ia->ia_ndrq = 1;
|
|
ia->ia_niomem = 0;
|
|
}
|
|
return (rval);
|
|
}
|
|
|
|
/* Attach function: attach and configure parallel port controller on isa bus. */
|
|
static void
|
|
atppc_isa_attach(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct atppc_isa_softc *sc = (struct atppc_isa_softc *)self;
|
|
struct atppc_softc *lsc = &sc->sc_atppc;
|
|
struct isa_attach_args *ia = aux;
|
|
|
|
printf(": AT Parallel Port\n");
|
|
|
|
lsc->sc_iot = ia->ia_iot;
|
|
lsc->sc_dmat = ia->ia_dmat;
|
|
lsc->sc_has = 0;
|
|
sc->sc_ic = ia->ia_ic;
|
|
sc->sc_iobase = ia->ia_io->ir_addr;
|
|
|
|
if (bus_space_map(lsc->sc_iot, sc->sc_iobase, IO_LPTSIZE, 0,
|
|
&lsc->sc_ioh) != 0) {
|
|
printf("%s: attempt to map bus space failed, device not "
|
|
"properly attached.\n", self->dv_xname);
|
|
lsc->sc_dev_ok = ATPPC_NOATTACH;
|
|
return;
|
|
}
|
|
|
|
lsc->sc_dev_ok = ATPPC_ATTACHED;
|
|
|
|
/* Assign interrupt handler */
|
|
if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_INTR)
|
|
&& ia->ia_irq->ir_irq != ISA_UNKNOWN_IRQ
|
|
&& ia->ia_nirq >= 1) {
|
|
sc->sc_irq = ia->ia_irq[0].ir_irq;
|
|
} else
|
|
sc->sc_irq = -1;
|
|
|
|
if (sc->sc_irq > 0) {
|
|
/* Establish interrupt handler. */
|
|
lsc->sc_ieh = isa_intr_establish(sc->sc_ic, sc->sc_irq,
|
|
IST_EDGE, IPL_ATPPC, atppcintr, &lsc->sc_dev);
|
|
|
|
lsc->sc_has |= ATPPC_HAS_INTR;
|
|
}
|
|
|
|
/* Configure DMA */
|
|
if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_DMA)
|
|
&& ia->ia_drq->ir_drq != ISA_UNKNOWN_DRQ
|
|
&& ia->ia_ndrq >= 1)
|
|
sc->sc_drq = ia->ia_drq[0].ir_drq;
|
|
else
|
|
sc->sc_drq = -1;
|
|
|
|
if (sc->sc_drq != -1
|
|
&& atppc_isadma_setup(lsc, sc->sc_ic, sc->sc_drq) == 0) {
|
|
lsc->sc_has |= ATPPC_HAS_DMA;
|
|
|
|
/* setup DMA hooks */
|
|
lsc->sc_dma_start = atppc_isa_dma_start;
|
|
lsc->sc_dma_finish = atppc_isa_dma_finish;
|
|
lsc->sc_dma_abort = atppc_isa_dma_abort;
|
|
lsc->sc_dma_malloc = atppc_isa_dma_malloc;
|
|
lsc->sc_dma_free = atppc_isa_dma_free;
|
|
}
|
|
|
|
/* Run soft configuration attach */
|
|
atppc_sc_attach(lsc);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Start DMA operation over ISA bus */
|
|
static int
|
|
atppc_isa_dma_start(struct atppc_softc *lsc, void *buf, u_int nbytes,
|
|
u_int8_t mode)
|
|
{
|
|
struct atppc_isa_softc *sc = (struct atppc_isa_softc *)lsc;
|
|
|
|
return atppc_isadma_start(sc->sc_ic, sc->sc_drq, buf, nbytes, mode);
|
|
}
|
|
|
|
/* Stop DMA operation over ISA bus */
|
|
static int
|
|
atppc_isa_dma_finish(struct atppc_softc *lsc)
|
|
{
|
|
struct atppc_isa_softc *sc = (struct atppc_isa_softc *)lsc;
|
|
|
|
return atppc_isadma_finish(sc->sc_ic, sc->sc_drq);
|
|
}
|
|
|
|
/* Abort DMA operation over ISA bus */
|
|
static int
|
|
atppc_isa_dma_abort(struct atppc_softc *lsc)
|
|
{
|
|
struct atppc_isa_softc *sc = (struct atppc_isa_softc *)lsc;
|
|
|
|
return atppc_isadma_abort(sc->sc_ic, sc->sc_drq);
|
|
}
|
|
|
|
/* Allocate memory for DMA over ISA bus */
|
|
static int
|
|
atppc_isa_dma_malloc(struct device *dev, void **buf, bus_addr_t *bus_addr,
|
|
bus_size_t size)
|
|
{
|
|
struct atppc_isa_softc *sc = (struct atppc_isa_softc *)dev;
|
|
|
|
return atppc_isadma_malloc(sc->sc_ic, sc->sc_drq, buf, bus_addr, size);
|
|
}
|
|
|
|
/* Free memory allocated by atppc_isa_dma_malloc() */
|
|
static void
|
|
atppc_isa_dma_free(struct device *dev, void **buf, bus_addr_t *bus_addr,
|
|
bus_size_t size)
|
|
{
|
|
struct atppc_isa_softc *sc = (struct atppc_isa_softc *)dev;
|
|
|
|
return atppc_isadma_free(sc->sc_ic, sc->sc_drq, buf, bus_addr, size);
|
|
}
|