NetBSD-5.0.2/sys/arch/arm/iomd/iomd.c
/* $NetBSD: iomd.c,v 1.15 2006/08/05 18:22:57 bjh21 Exp $ */
/*
* Copyright (c) 1996-1997 Mark Brinicombe.
* Copyright (c) 1997 Causality Limited
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*
* RiscBSD kernel project
*
* iomd.c
*
* Probing and configuration for the IOMD
*
* Created : 10/10/95
* Updated : 18/03/01 for rpckbd as part of the wscons project
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: iomd.c,v 1.15 2006/08/05 18:22:57 bjh21 Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <arm/iomd/iomdreg.h>
#include <arm/iomd/iomdvar.h>
#include "iomd.h"
/*
* IOMD device.
*
* This probes and attaches the top level IOMD device.
* It then configures any children of the IOMD device.
*/
/*
* IOMD softc structure.
*
* Contains the device node, bus space tag, handle and address
* and the IOMD id.
*/
struct iomd_softc {
struct device sc_dev; /* device node */
bus_space_tag_t sc_iot; /* bus tag */
bus_space_handle_t sc_ioh; /* bus handle */
int sc_id; /* IOMD id */
};
static int iomdmatch(struct device *parent, struct cfdata *cf,
void *aux);
static void iomdattach(struct device *parent, struct device *self,
void *aux);
static int iomdprint(void *aux, const char *iomdbus);
CFATTACH_DECL(iomd, sizeof(struct iomd_softc),
iomdmatch, iomdattach, NULL, NULL);
extern struct bus_space iomd_bs_tag;
int iomd_found;
u_int32_t iomd_base = IOMD_BASE;
/* following flag is used in iomd_irq.s ... has to be cleaned up one day ! */
u_int32_t arm7500_ioc_found = 0;
/* Declare prototypes */
/*
* int iomdprint(void *aux, const char *name)
*
* print configuration info for children
*/
static int
iomdprint(void *aux, const char *name)
{
/* union iomd_attach_args *ia = aux;*/
return QUIET;
}
/*
* int iomdmatch(struct device *parent, struct cfdata *cf, void *aux)
*
* Just return ok for this if it is device 0
*/
static int
iomdmatch(struct device *parent, struct cfdata *cf, void *aux)
{
if (iomd_found)
return 0;
return 1;
}
/*
* void iomdattach(struct device *parent, struct device *dev, void *aux)
*
* Map the IOMD and identify it.
* Then configure the child devices based on the IOMD ID.
*/
static void
iomdattach(struct device *parent, struct device *self, void *aux)
{
struct iomd_softc *sc = (struct iomd_softc *)self;
/* struct mainbus_attach_args *mb = aux;*/
int refresh;
#if 0
int i, tmp;
#endif
union iomd_attach_args ia;
bus_space_tag_t iot;
bus_space_handle_t ioh;
/* There can be only 1 IOMD. */
iomd_found = 1;
iot = sc->sc_iot = &iomd_bs_tag;
/* Map the IOMD */
if (bus_space_map(iot, (int) iomd_base, IOMD_SIZE, 0, &ioh))
panic("%s: Cannot map registers", self->dv_xname);
sc->sc_ioh = ioh;
/* Get the ID */
sc->sc_id = bus_space_read_1(iot, ioh, IOMD_ID0)
| (bus_space_read_1(iot, ioh, IOMD_ID1) << 8);
printf(": ");
/* Identify it and get the DRAM refresh rate */
switch (sc->sc_id) {
case ARM7500_IOC_ID:
printf("ARM7500 IOMD ");
refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f;
arm7500_ioc_found = 1;
break;
case ARM7500FE_IOC_ID:
printf("ARM7500FE IOMD ");
refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f;
arm7500_ioc_found = 1;
break;
case RPC600_IOMD_ID:
printf("IOMD20 ");
refresh = bus_space_read_1(iot, ioh, IOMD_VREFCR) & 0x09;
arm7500_ioc_found = 0;
break;
default:
printf("Unknown IOMD ID=%04x ", sc->sc_id);
refresh = -1;
arm7500_ioc_found = 0; /* just in case */
break;
}
printf("version %d\n", bus_space_read_1(iot, ioh, IOMD_VERSION));
/* Report the DRAM refresh rate */
printf("%s: ", self->dv_xname);
printf("DRAM refresh=");
switch (refresh) {
case 0x0:
printf("off");
break;
case 0x1:
printf("16us");
break;
case 0x2:
printf("32us");
break;
case 0x4:
printf("64us");
break;
case 0x8:
printf("128us");
break;
default:
printf("unknown [%02x]", refresh);
break;
}
printf("\n");
#if 0
/*
* No point in reporting this as it may get changed when devices are
* attached
*/
tmp = bus_space_read_1(iot, ioh, IOMD_IOTCR);
printf("%s: I/O timings: combo %c, NPCCS1/2 %c", self->dv_xname,
'A' + ((tmp >>2) & 3), 'A' + (tmp & 3));
tmp = bus_space_read_1(iot, ioh, IOMD_ECTCR);
printf(", EASI ");
for (i = 0; i < 8; i++, tmp >>= 1)
printf("%c", 'A' + ((tmp & 1) << 2));
tmp = bus_space_read_1(iot, ioh, IOMD_DMATCR);
printf(", DMA ");
for (i = 0; i < 4; i++, tmp >>= 2)
printf("%c", 'A' + (tmp & 3));
printf("\n");
#endif
/* Set up the external DMA channels */
/* XXX - this should be machine dependant not IOMD dependant */
switch (sc->sc_id) {
case ARM7500_IOC_ID:
case ARM7500FE_IOC_ID:
break;
case RPC600_IOMD_ID:
/* DMA channels 2 & 3 are external */
bus_space_write_1(iot, ioh, IOMD_DMAEXT, 0x0c);
break;
}
/* Configure the child devices */
/* Attach clock device */
ia.ia_clk.ca_name = "clk";
ia.ia_clk.ca_iot = iot;
ia.ia_clk.ca_ioh = ioh;
config_found(self, &ia, iomdprint);
/* Attach kbd device when configured */
if (bus_space_subregion(iot, ioh, IOMD_KBDDAT, 8, &ia.ia_kbd.ka_ioh))
panic("%s: Cannot map kbd registers", self->dv_xname);
ia.ia_kbd.ka_name = "kbd";
ia.ia_kbd.ka_iot = iot;
ia.ia_kbd.ka_rxirq = IRQ_KBDRX;
ia.ia_kbd.ka_txirq = IRQ_KBDTX;
config_found(self, &ia, iomdprint);
/* Attach iic device */
if (bus_space_subregion(iot, ioh, IOMD_IOCR, 4, &ia.ia_iic.ia_ioh))
panic("%s: Cannot map iic registers", self->dv_xname);
ia.ia_iic.ia_name = "iic";
ia.ia_iic.ia_iot = iot;
ia.ia_iic.ia_irq = -1;
config_found(self, &ia, iomdprint);
switch (sc->sc_id) {
case ARM7500_IOC_ID:
case ARM7500FE_IOC_ID:
/* Attach opms device */
if (bus_space_subregion(iot, ioh, IOMD_MSDATA, 8,
&ia.ia_opms.pa_ioh))
panic("%s: Cannot map opms registers", self->dv_xname);
ia.ia_opms.pa_name = "opms";
ia.ia_opms.pa_iot = iot;
ia.ia_opms.pa_irq = IRQ_MSDRX;
config_found(self, &ia, iomdprint);
break;
case RPC600_IOMD_ID:
/* Attach (ws)qms device */
if (bus_space_subregion(iot, ioh, IOMD_MOUSEX, 8,
&ia.ia_qms.qa_ioh))
panic("%s: Cannot map qms registers", self->dv_xname);
if (bus_space_map(iot, IO_MOUSE_BUTTONS, 4, 0, &ia.ia_qms.qa_ioh_but))
panic("%s: Cannot map registers", self->dv_xname);
ia.ia_qms.qa_name = "qms";
ia.ia_qms.qa_iot = iot;
ia.ia_qms.qa_irq = IRQ_VSYNC;
config_found(self, &ia, iomdprint);
break;
}
}
/* End of iomd.c */