247 lines
7.1 KiB
C
247 lines
7.1 KiB
C
/* $NetBSD: atppc_isa.c,v 1.16 2021/12/03 13:27:38 andvar Exp $ */
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/*-
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* Copyright (c) 2001 Alcove - Nicolas Souchu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* FreeBSD: src/sys/isa/ppc.c,v 1.26.2.5 2001/10/02 05:21:45 nsouch Exp
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*
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: atppc_isa.c,v 1.16 2021/12/03 13:27:38 andvar Exp $");
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#include "opt_atppc.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/intr.h>
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#include <sys/bus.h>
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#include <dev/isa/isareg.h>
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#include <dev/isa/isavar.h>
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#include <dev/isa/isadmavar.h>
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#include <dev/ic/atppcreg.h>
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#include <dev/ic/atppcvar.h>
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#include <dev/isa/atppc_isadma.h>
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/*
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* ISA bus attach code for atppc driver.
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* Note on capabilities: capabilities may exist in the chipset but may not
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* necessarily be useable. I.e. you may specify an IRQ in the autoconfig, but
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* will the port actually have an IRQ assigned to it at the hardware level?
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* How can you test if the capabilities can be used? For interrupts, see if a
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* handler exists (sc_intr != NULL). For DMA, see if the sc_dma_start() and
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* sc_dma_finish() function pointers are not NULL.
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*/
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/* Configuration data for atppc on isa bus. */
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struct atppc_isa_softc {
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/* Machine independent device data */
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struct atppc_softc sc_atppc;
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/* IRQ/DRQ/IO Port assignments on ISA bus */
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int sc_irq;
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int sc_drq;
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int sc_iobase;
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/* ISA chipset tag */
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isa_chipset_tag_t sc_ic;
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};
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/* Probe and attach functions for a atppc device on the ISA bus. */
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static int atppc_isa_probe(device_t, cfdata_t, void *);
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static void atppc_isa_attach(device_t, device_t, void *);
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static int atppc_isa_dma_start(struct atppc_softc *, void *, u_int,
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u_int8_t);
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static int atppc_isa_dma_finish(struct atppc_softc *);
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static int atppc_isa_dma_abort(struct atppc_softc *);
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static int atppc_isa_dma_malloc(device_t, void **, bus_addr_t *,
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bus_size_t);
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static void atppc_isa_dma_free(device_t, void **, bus_addr_t *,
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bus_size_t);
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CFATTACH_DECL_NEW(atppc_isa, sizeof(struct atppc_isa_softc), atppc_isa_probe,
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atppc_isa_attach, NULL, NULL);
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/*
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* Probe function: find parallel port controller on isa bus. Combined from
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* lpt_isa_probe() in lpt.c and atppc_detect_port() from FreeBSD's ppc.c.
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*/
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static int
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atppc_isa_probe(device_t parent, cfdata_t cf, void *aux)
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{
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bus_space_handle_t ioh;
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struct isa_attach_args *ia = aux;
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bus_space_tag_t iot = ia->ia_iot;
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int rval = 0;
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if (ia->ia_nio < 1)
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return (0);
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/* Disallow wildcarded i/o address */
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if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
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return (0);
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if (bus_space_map(iot, ia->ia_io[0].ir_addr, IO_LPTSIZE, 0, &ioh))
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return (0);
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if (atppc_detect_port(iot, ioh) == 0)
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rval = 1;
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bus_space_unmap(iot, ioh, IO_LPTSIZE);
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if (rval) {
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ia->ia_nio = 1;
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ia->ia_io[0].ir_size = IO_LPTSIZE;
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ia->ia_nirq = 1;
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ia->ia_ndrq = 1;
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ia->ia_niomem = 0;
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}
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return (rval);
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}
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/* Attach function: attach and configure parallel port controller on isa bus. */
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static void
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atppc_isa_attach(device_t parent, device_t self, void *aux)
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{
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struct atppc_isa_softc *sc = device_private(self);
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struct atppc_softc *lsc = &sc->sc_atppc;
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struct isa_attach_args *ia = aux;
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printf(": AT Parallel Port\n");
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lsc->sc_iot = ia->ia_iot;
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lsc->sc_dmat = ia->ia_dmat;
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lsc->sc_has = 0;
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sc->sc_ic = ia->ia_ic;
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sc->sc_iobase = ia->ia_io->ir_addr;
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if (bus_space_map(lsc->sc_iot, sc->sc_iobase, IO_LPTSIZE, 0,
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&lsc->sc_ioh) != 0) {
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aprint_error_dev(self, "attempt to map bus space failed, device not "
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"properly attached.\n");
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lsc->sc_dev_ok = ATPPC_NOATTACH;
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return;
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}
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lsc->sc_dev = self;
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lsc->sc_dev_ok = ATPPC_ATTACHED;
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/* Assign interrupt handler */
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if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_INTR)
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&& ia->ia_irq->ir_irq != ISA_UNKNOWN_IRQ
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&& ia->ia_nirq >= 1) {
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sc->sc_irq = ia->ia_irq[0].ir_irq;
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} else
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sc->sc_irq = -1;
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if (sc->sc_irq > 0) {
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/* Establish interrupt handler. */
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lsc->sc_ieh = isa_intr_establish(sc->sc_ic, sc->sc_irq,
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IST_EDGE, IPL_TTY, atppcintr, lsc->sc_dev);
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lsc->sc_has |= ATPPC_HAS_INTR;
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}
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/* Configure DMA */
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if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_DMA)
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&& ia->ia_drq->ir_drq != ISA_UNKNOWN_DRQ
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&& ia->ia_ndrq >= 1)
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sc->sc_drq = ia->ia_drq[0].ir_drq;
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else
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sc->sc_drq = -1;
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if (sc->sc_drq != -1
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&& atppc_isadma_setup(lsc, sc->sc_ic, sc->sc_drq) == 0) {
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lsc->sc_has |= ATPPC_HAS_DMA;
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/* setup DMA hooks */
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lsc->sc_dma_start = atppc_isa_dma_start;
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lsc->sc_dma_finish = atppc_isa_dma_finish;
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lsc->sc_dma_abort = atppc_isa_dma_abort;
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lsc->sc_dma_malloc = atppc_isa_dma_malloc;
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lsc->sc_dma_free = atppc_isa_dma_free;
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}
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/* Run soft configuration attach */
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atppc_sc_attach(lsc);
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return;
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}
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/* Start DMA operation over ISA bus */
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static int
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atppc_isa_dma_start(struct atppc_softc *lsc, void *buf, u_int nbytes,
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u_int8_t mode)
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{
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struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc;
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return atppc_isadma_start(sc->sc_ic, sc->sc_drq, buf, nbytes, mode);
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}
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/* Stop DMA operation over ISA bus */
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static int
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atppc_isa_dma_finish(struct atppc_softc *lsc)
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{
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struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc;
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return atppc_isadma_finish(sc->sc_ic, sc->sc_drq);
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}
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/* Abort DMA operation over ISA bus */
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static int
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atppc_isa_dma_abort(struct atppc_softc *lsc)
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{
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struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc;
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return atppc_isadma_abort(sc->sc_ic, sc->sc_drq);
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}
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/* Allocate memory for DMA over ISA bus */
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static int
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atppc_isa_dma_malloc(device_t dev, void **buf, bus_addr_t *bus_addr,
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bus_size_t size)
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{
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struct atppc_isa_softc *sc = device_private(dev);
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return atppc_isadma_malloc(sc->sc_ic, sc->sc_drq, buf, bus_addr, size);
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}
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/* Free memory allocated by atppc_isa_dma_malloc() */
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static void
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atppc_isa_dma_free(device_t dev, void **buf, bus_addr_t *bus_addr,
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bus_size_t size)
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{
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struct atppc_isa_softc *sc = device_private(dev);
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return atppc_isadma_free(sc->sc_ic, sc->sc_drq, buf, bus_addr, size);
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}
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