718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
277 lines
6.8 KiB
C
277 lines
6.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1997-2000 Nicolas Souchu
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* Copyright (c) 2001 Alcove - Nicolas Souchu
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* Copyright (c) 2006 Marcel Moolenaar
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <isa/isavar.h>
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#include <dev/ppbus/ppbconf.h>
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#include <dev/ppbus/ppb_msq.h>
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#include <dev/ppc/ppcvar.h>
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#include <dev/ppc/ppcreg.h>
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#include "ppbus_if.h"
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static int ppc_isa_probe(device_t dev);
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int ppc_isa_attach(device_t dev);
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int ppc_isa_write(device_t, char *, int, int);
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static device_method_t ppc_isa_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, ppc_isa_probe),
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DEVMETHOD(device_attach, ppc_isa_attach),
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DEVMETHOD(device_detach, ppc_detach),
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/* bus interface */
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DEVMETHOD(bus_read_ivar, ppc_read_ivar),
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DEVMETHOD(bus_write_ivar, ppc_write_ivar),
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DEVMETHOD(bus_alloc_resource, ppc_alloc_resource),
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DEVMETHOD(bus_release_resource, ppc_release_resource),
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/* ppbus interface */
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DEVMETHOD(ppbus_io, ppc_io),
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DEVMETHOD(ppbus_exec_microseq, ppc_exec_microseq),
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DEVMETHOD(ppbus_reset_epp, ppc_reset_epp),
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DEVMETHOD(ppbus_setmode, ppc_setmode),
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DEVMETHOD(ppbus_ecp_sync, ppc_ecp_sync),
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DEVMETHOD(ppbus_read, ppc_read),
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DEVMETHOD(ppbus_write, ppc_isa_write),
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{ 0, 0 }
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};
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static driver_t ppc_isa_driver = {
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ppc_driver_name,
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ppc_isa_methods,
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sizeof(struct ppc_data),
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};
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static struct isa_pnp_id lpc_ids[] = {
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{ 0x0004d041, "Standard parallel printer port" }, /* PNP0400 */
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{ 0x0104d041, "ECP parallel printer port" }, /* PNP0401 */
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{ 0 }
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};
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static void
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ppc_isa_dmadone(struct ppc_data *ppc)
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{
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isa_dmadone(ppc->ppc_dmaflags, ppc->ppc_dmaddr, ppc->ppc_dmacnt,
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ppc->ppc_dmachan);
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}
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int
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ppc_isa_attach(device_t dev)
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{
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struct ppc_data *ppc = device_get_softc(dev);
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if ((ppc->ppc_avm & PPB_ECP) && (ppc->ppc_dmachan > 0)) {
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/* acquire the DMA channel forever */ /* XXX */
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isa_dma_acquire(ppc->ppc_dmachan);
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isa_dmainit(ppc->ppc_dmachan, 1024); /* nlpt.BUFSIZE */
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ppc->ppc_dmadone = ppc_isa_dmadone;
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}
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return (ppc_attach(dev));
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}
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static int
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ppc_isa_probe(device_t dev)
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{
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device_t parent;
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int error;
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parent = device_get_parent(dev);
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error = ISA_PNP_PROBE(parent, dev, lpc_ids);
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if (error == ENXIO)
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return (ENXIO);
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if (error != 0) /* XXX shall be set after detection */
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device_set_desc(dev, "Parallel port");
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return (ppc_probe(dev, 0));
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}
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/*
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* Call this function if you want to send data in any advanced mode
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* of your parallel port: FIFO, DMA
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*
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* If what you want is not possible (no ECP, no DMA...),
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* EINVAL is returned
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*/
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int
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ppc_isa_write(device_t dev, char *buf, int len, int how)
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{
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struct ppc_data *ppc = device_get_softc(dev);
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char ecr, ecr_sav, ctr, ctr_sav;
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int error = 0;
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int spin;
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PPC_ASSERT_LOCKED(ppc);
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if (!(ppc->ppc_avm & PPB_ECP))
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return (EINVAL);
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if (ppc->ppc_dmachan == 0)
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return (EINVAL);
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#ifdef PPC_DEBUG
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printf("w");
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#endif
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ecr_sav = r_ecr(ppc);
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ctr_sav = r_ctr(ppc);
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/*
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* Send buffer with DMA, FIFO and interrupts
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*/
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/* byte mode, no intr, no DMA, dir=0, flush fifo */
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ecr = PPC_ECR_STD | PPC_DISABLE_INTR;
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w_ecr(ppc, ecr);
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/* disable nAck interrupts */
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ctr = r_ctr(ppc);
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ctr &= ~IRQENABLE;
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w_ctr(ppc, ctr);
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ppc->ppc_dmaflags = 0;
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ppc->ppc_dmaddr = (caddr_t)buf;
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ppc->ppc_dmacnt = (u_int)len;
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switch (ppc->ppc_mode) {
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case PPB_COMPATIBLE:
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/* compatible mode with FIFO, no intr, DMA, dir=0 */
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ecr = PPC_ECR_FIFO | PPC_DISABLE_INTR | PPC_ENABLE_DMA;
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break;
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case PPB_ECP:
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ecr = PPC_ECR_ECP | PPC_DISABLE_INTR | PPC_ENABLE_DMA;
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break;
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default:
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error = EINVAL;
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goto error;
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}
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w_ecr(ppc, ecr);
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ecr = r_ecr(ppc);
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ppc->ppc_dmastat = PPC_DMA_INIT;
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/* enable interrupts */
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ecr &= ~PPC_SERVICE_INTR;
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ppc->ppc_irqstat = PPC_IRQ_DMA;
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w_ecr(ppc, ecr);
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isa_dmastart(ppc->ppc_dmaflags, ppc->ppc_dmaddr, ppc->ppc_dmacnt,
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ppc->ppc_dmachan);
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ppc->ppc_dmastat = PPC_DMA_STARTED;
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#ifdef PPC_DEBUG
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printf("s%d", ppc->ppc_dmacnt);
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#endif
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/* Wait for the DMA completed interrupt. We hope we won't
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* miss it, otherwise a signal will be necessary to unlock the
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* process.
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*/
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do {
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/* release CPU */
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error = mtx_sleep(ppc, &ppc->ppc_lock, PPBPRI | PCATCH,
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"ppcdma", 0);
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} while (error == EWOULDBLOCK);
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if (error) {
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#ifdef PPC_DEBUG
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printf("i");
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#endif
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/* stop DMA */
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isa_dmadone(ppc->ppc_dmaflags, ppc->ppc_dmaddr,
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ppc->ppc_dmacnt, ppc->ppc_dmachan);
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/* no dma, no interrupt, flush the fifo */
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w_ecr(ppc, PPC_ECR_RESET);
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ppc->ppc_dmastat = PPC_DMA_INTERRUPTED;
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goto error;
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}
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/* wait for an empty fifo */
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while (!(r_ecr(ppc) & PPC_FIFO_EMPTY)) {
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for (spin=100; spin; spin--)
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if (r_ecr(ppc) & PPC_FIFO_EMPTY)
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goto fifo_empty;
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#ifdef PPC_DEBUG
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printf("Z");
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#endif
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error = mtx_sleep(ppc, &ppc->ppc_lock, PPBPRI | PCATCH,
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"ppcfifo", hz / 100);
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if (error != EWOULDBLOCK) {
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#ifdef PPC_DEBUG
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printf("I");
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#endif
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/* no dma, no interrupt, flush the fifo */
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w_ecr(ppc, PPC_ECR_RESET);
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ppc->ppc_dmastat = PPC_DMA_INTERRUPTED;
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error = EINTR;
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goto error;
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}
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}
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fifo_empty:
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/* no dma, no interrupt, flush the fifo */
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w_ecr(ppc, PPC_ECR_RESET);
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error:
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/* PDRQ must be kept unasserted until nPDACK is
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* deasserted for a minimum of 350ns (SMC datasheet)
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*
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* Consequence may be a FIFO that never empty
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*/
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DELAY(1);
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w_ecr(ppc, ecr_sav);
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w_ctr(ppc, ctr_sav);
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return (error);
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}
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DRIVER_MODULE(ppc, isa, ppc_isa_driver, ppc_devclass, 0, 0);
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