NetBSD-5.0.2/sys/arch/acorn32/podulebus/amps.c
/* $NetBSD: amps.c,v 1.14 2008/04/28 20:23:10 martin Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Mark Brinicombe of Causality Limited.
*
* 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.
*
* Card driver and probe and attach functions to use generic 16550 com
* driver for the Atomwide multiport serial podule
*/
/*
* Thanks to Martin Coulson, Atomwide, for providing the hardware
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: amps.c,v 1.14 2008/04/28 20:23:10 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/types.h>
#include <sys/device.h>
#include <machine/intr.h>
#include <machine/io.h>
#include <machine/bus.h>
#include <acorn32/podulebus/podulebus.h>
#include <acorn32/podulebus/ampsreg.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <dev/podulebus/podules.h>
#include "locators.h"
/*
* Atomwide Mulit-port serial podule device.
*
* This probes and attaches the top level multi-port serial device to the
* podulebus. It then configures the child com devices.
*/
/*
* Atomwide Multi-port serial card softc structure.
*
* Contains the device node, podule information and global information
* required by the driver such as the card version and the interrupt mask.
*/
struct amps_softc {
struct device sc_dev; /* device node */
podule_t *sc_podule; /* Our podule info */
int sc_podule_number; /* Our podule number */
bus_space_tag_t sc_iot; /* Bus tag */
};
int amps_probe(struct device *, struct cfdata *, void *);
void amps_attach(struct device *, struct device *, void *);
CFATTACH_DECL(amps, sizeof(struct amps_softc),
amps_probe, amps_attach, NULL, NULL);
int amps_print(void *, const char *);
void amps_shutdown(void *);
/*
* Attach arguments for child devices.
* Pass the podule details, the parent softc and the channel
*/
struct amps_attach_args {
bus_space_tag_t aa_iot; /* bus space tag */
unsigned int aa_base; /* base address for port */
int aa_port; /* serial port number */
podulebus_intr_handle_t aa_irq; /* IRQ number */
};
/*
* Define prototypes for custom bus space functions.
*/
/* Print function used during child config */
int
amps_print(aux, name)
void *aux;
const char *name;
{
struct amps_attach_args *aa = aux;
if (!name)
aprint_normal(", port %d", aa->aa_port);
return(QUIET);
}
/*
* Card probe function
*
* Just match the manufacturer and podule ID's
*/
int
amps_probe(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct podule_attach_args *pa = (void *)aux;
return (pa->pa_product == PODULE_ATOMWIDE_SERIAL);
}
/*
* Card attach function
*
* Identify the card version and configure any children.
* Install a shutdown handler to kill interrupts on shutdown
*/
void
amps_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct amps_softc *sc = (void *)self;
struct podule_attach_args *pa = (void *)aux;
struct amps_attach_args aa;
/* Note the podule number and validate */
if (pa->pa_podule_number == -1)
panic("Podule has disappeared !");
sc->sc_podule_number = pa->pa_podule_number;
sc->sc_podule = pa->pa_podule;
podules[sc->sc_podule_number].attached = 1;
sc->sc_iot = pa->pa_iot;
/* Install a clean up handler to make sure IRQ's are disabled */
/* if (shutdownhook_establish(amps_shutdown, (void *)sc) == NULL)
panic("%s: Cannot install shutdown handler", self->dv_xname);*/
/* Set the interrupt info for this podule */
/* sc->sc_podule->irq_addr = pa->pa_podule->slow_base +;*/ /* XXX */
/* sc->sc_podule->irq_mask = ;*/
printf("\n");
/* Configure the children */
aa.aa_iot = sc->sc_iot;
aa.aa_base = pa->pa_podule->slow_base + AMPS_BASE_OFFSET;
aa.aa_base += MAX_AMPS_PORTS * AMPS_PORT_SPACING;
aa.aa_irq = pa->pa_podule->interrupt;
for (aa.aa_port = 0; aa.aa_port < MAX_AMPS_PORTS; ++aa.aa_port) {
aa.aa_base -= AMPS_PORT_SPACING;
config_found(self, &aa, amps_print);
}
}
/*
* Card shutdown function
*
* Called via do_shutdown_hooks() during kernel shutdown.
* Clear the cards's interrupt mask to stop any podule interrupts.
*/
/*void
amps_shutdown(arg)
void *arg;
{
}*/
/*
* Atomwide Multi-Port Serial probe and attach code for the com device.
*
* This provides a different pair of probe and attach functions
* for attaching the com device (dev/ic/com.c) to the Atomwide serial card.
*/
struct com_amps_softc {
struct com_softc sc_com; /* real "com" softc */
void *sc_ih; /* interrupt handler */
struct evcnt sc_intrcnt; /* interrupt count */
};
/* Prototypes for functions */
static int com_amps_probe (device_t, cfdata_t , void *);
static void com_amps_attach (device_t, device_t, void *);
/* device attach structure */
CFATTACH_DECL_NEW(com_amps, sizeof(struct com_amps_softc),
com_amps_probe, com_amps_attach, NULL, NULL);
/*
* Controller probe function
*
* Map all the required I/O space for this channel, make sure interrupts
* are disabled and probe the bus.
*/
int
com_amps_probe(device_t parent, cfdata_t cf, void *aux)
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;
int rv = 1;
struct amps_attach_args *aa = aux;
iot = aa->aa_iot;
iobase = aa->aa_base;
/* if it's in use as console, it's there. */
if (!com_is_console(iot, iobase, 0)) {
if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
return 0;
}
/*
* We don't use the generic comprobe1() function as it
* is not good enough to identify which ports are present.
*
* Instead test for the presence of the scratch register
*/
bus_space_write_1(iot, ioh, com_scratch, 0x55);
bus_space_write_1(iot, ioh, com_ier, 0);
(void)bus_space_read_1(iot, ioh, com_data);
if (bus_space_read_1(iot, ioh, com_scratch) != 0x55)
rv = 0;
bus_space_write_1(iot, ioh, com_scratch, 0xaa);
bus_space_write_1(iot, ioh, com_ier, 0);
(void)bus_space_read_1(iot, ioh, com_data);
if (bus_space_read_1(iot, ioh, com_scratch) != 0xaa)
rv = 0;
bus_space_unmap(iot, ioh, COM_NPORTS);
}
return (rv);
}
/*
* Controller attach function
*
* Map all the required I/O space for this port and attach the driver
* The generic attach will probe and attach any device.
* Install an interrupt handler and we are ready to rock.
*/
void
com_amps_attach(device_t parent, device_t self, void *aux)
{
struct com_amps_softc *asc = device_private(self);
struct com_softc *sc = &asc->sc_com;
u_int iobase;
bus_space_tag_t iot;
bus_space_handle_t ioh;
struct amps_attach_args *aa = aux;
sc->sc_dev = self;
iot = aa->aa_iot;
iobase = aa->aa_base;
if (!com_is_console(iot, iobase, &ioh)
&& bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
panic("comattach: io mapping failed");
COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
sc->sc_frequency = AMPS_FREQ;
com_attach_subr(sc);
evcnt_attach_dynamic(&asc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
device_xname(self), "intr");
asc->sc_ih = podulebus_irq_establish(aa->aa_irq, IPL_SERIAL, comintr,
sc, &asc->sc_intrcnt);
}