322 lines
8.8 KiB
C
322 lines
8.8 KiB
C
/* $NetBSD: amps.c,v 1.6 2001/03/18 16:58:55 bjh21 Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Mark Brinicombe of Causality Limited.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Card driver and probe and attach functions to use generic 16550 com
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* driver for the Atomwide multiport serial podule
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*/
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/*
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* Thanks to Martin Coulson, Atomwide, for providing the hardware
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioctl.h>
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#include <sys/select.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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#include <sys/types.h>
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#include <sys/device.h>
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#include <machine/irqhandler.h>
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#include <machine/io.h>
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#include <machine/bus.h>
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#include <arm32/podulebus/podulebus.h>
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#include <arm32/podulebus/ampsreg.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <dev/podulebus/podules.h>
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#include "locators.h"
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/*
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* Atomwide Mulit-port serial podule device.
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*
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* This probes and attaches the top level multi-port serial device to the
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* podulebus. It then configures the child com devices.
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*/
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/*
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* Atomwide Multi-port serial card softc structure.
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*
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* Contains the device node, podule information and global information
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* required by the driver such as the card version and the interrupt mask.
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*/
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struct amps_softc {
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struct device sc_dev; /* device node */
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podule_t *sc_podule; /* Our podule info */
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int sc_podule_number; /* Our podule number */
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bus_space_tag_t sc_iot; /* Bus tag */
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};
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int amps_probe __P((struct device *, struct cfdata *, void *));
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void amps_attach __P((struct device *, struct device *, void *));
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void amps_shutdown __P((void *arg));
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struct cfattach amps_ca = {
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sizeof(struct amps_softc), amps_probe, amps_attach
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};
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/*
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* Attach arguments for child devices.
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* Pass the podule details, the parent softc and the channel
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*/
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struct amps_attach_args {
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bus_space_tag_t aa_iot; /* bus space tag */
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unsigned int aa_base; /* base address for port */
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int aa_port; /* serial port number */
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podulebus_intr_handle_t aa_irq; /* IRQ number */
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};
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/*
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* Define prototypes for custom bus space functions.
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*/
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/* Print function used during child config */
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int
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amps_print(aux, name)
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void *aux;
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const char *name;
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{
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struct amps_attach_args *aa = aux;
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if (!name)
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printf(", port %d", aa->aa_port);
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return(QUIET);
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}
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/*
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* Card probe function
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*
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* Just match the manufacturer and podule ID's
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*/
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int
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amps_probe(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct podule_attach_args *pa = (void *)aux;
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if (matchpodule(pa, MANUFACTURER_ATOMWIDE2, PODULE_ATOMWIDE2_SERIAL, -1) == 0)
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return(0);
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return(1);
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}
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/*
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* Card attach function
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*
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* Identify the card version and configure any children.
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* Install a shutdown handler to kill interrupts on shutdown
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*/
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void
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amps_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct amps_softc *sc = (void *)self;
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struct podule_attach_args *pa = (void *)aux;
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struct amps_attach_args aa;
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/* Note the podule number and validate */
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if (pa->pa_podule_number == -1)
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panic("Podule has disappeared !");
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sc->sc_podule_number = pa->pa_podule_number;
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sc->sc_podule = pa->pa_podule;
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podules[sc->sc_podule_number].attached = 1;
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sc->sc_iot = pa->pa_iot;
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/* Install a clean up handler to make sure IRQ's are disabled */
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/* if (shutdownhook_establish(amps_shutdown, (void *)sc) == NULL)
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panic("%s: Cannot install shutdown handler", self->dv_xname);*/
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/* Set the interrupt info for this podule */
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/* sc->sc_podule->irq_addr = pa->pa_podule->slow_base +;*/ /* XXX */
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/* sc->sc_podule->irq_mask = ;*/
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printf("\n");
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/* Configure the children */
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aa.aa_iot = sc->sc_iot;
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aa.aa_base = pa->pa_podule->slow_base + AMPS_BASE_OFFSET;
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aa.aa_base += MAX_AMPS_PORTS * AMPS_PORT_SPACING;
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aa.aa_irq = pa->pa_podule->interrupt;
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for (aa.aa_port = 0; aa.aa_port < MAX_AMPS_PORTS; ++aa.aa_port) {
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aa.aa_base -= AMPS_PORT_SPACING;
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config_found_sm(self, &aa, amps_print, NULL);
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}
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}
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/*
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* Card shutdown function
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*
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* Called via do_shutdown_hooks() during kernel shutdown.
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* Clear the cards's interrupt mask to stop any podule interrupts.
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*/
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/*void
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amps_shutdown(arg)
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void *arg;
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{
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}*/
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/*
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* Atomwide Multi-Port Serial probe and attach code for the com device.
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*
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* This provides a different pair of probe and attach functions
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* for attaching the com device (dev/ic/com.c) to the Atomwide serial card.
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*/
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struct com_amps_softc {
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struct com_softc sc_com; /* real "com" softc */
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void *sc_ih; /* interrupt handler */
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struct evcnt sc_intrcnt; /* interrupt count */
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};
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/* Prototypes for functions */
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static int com_amps_probe __P((struct device *, struct cfdata *, void *));
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static void com_amps_attach __P((struct device *, struct device *, void *));
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/* device attach structure */
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struct cfattach com_amps_ca = {
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sizeof(struct com_amps_softc), com_amps_probe, com_amps_attach
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};
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/*
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* Controller probe function
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*
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* Map all the required I/O space for this channel, make sure interrupts
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* are disabled and probe the bus.
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*/
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int
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com_amps_probe(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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int iobase;
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int rv = 1;
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struct amps_attach_args *aa = aux;
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iot = aa->aa_iot;
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iobase = aa->aa_base;
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/* if it's in use as console, it's there. */
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if (!com_is_console(iot, iobase, 0)) {
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if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
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return 0;
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}
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/*
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* We don't use the generic comprobe1() function as it
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* is not good enough to identify which ports are present.
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*
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* Instead test for the presence of the scratch register
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*/
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bus_space_write_1(iot, ioh, com_scratch, 0x55);
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bus_space_write_1(iot, ioh, com_ier, 0);
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(void)bus_space_read_1(iot, ioh, com_data);
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if (bus_space_read_1(iot, ioh, com_scratch) != 0x55)
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rv = 0;
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bus_space_write_1(iot, ioh, com_scratch, 0xaa);
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bus_space_write_1(iot, ioh, com_ier, 0);
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(void)bus_space_read_1(iot, ioh, com_data);
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if (bus_space_read_1(iot, ioh, com_scratch) != 0xaa)
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rv = 0;
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bus_space_unmap(iot, ioh, COM_NPORTS);
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}
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return (rv);
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}
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/*
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* Controller attach function
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*
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* Map all the required I/O space for this port and attach the driver
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* The generic attach will probe and attach any device.
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* Install an interrupt handler and we are ready to rock.
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*/
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void
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com_amps_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct com_amps_softc *asc = (void *)self;
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struct com_softc *sc = &asc->sc_com;
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u_int iobase;
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bus_space_tag_t iot;
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struct amps_attach_args *aa = aux;
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iot = sc->sc_iot = aa->aa_iot;
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iobase = sc->sc_iobase = aa->aa_base;
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if (!com_is_console(iot, iobase, &sc->sc_ioh)
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&& bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh))
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panic("comattach: io mapping failed");
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sc->sc_frequency = AMPS_FREQ;
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com_attach_subr(sc);
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evcnt_attach_dynamic(&asc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
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self->dv_xname, "intr");
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asc->sc_ih = podulebus_irq_establish(aa->aa_irq, IPL_SERIAL, comintr,
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sc, &asc->sc_intrcnt);
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}
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