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/* $OpenBSD: flash.c,v 1.3 2003/06/02 18:40:59 jason Exp $ */
/*
* Copyright (c) 1999 Jason L. Wright (jason@thought.net)
* 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.
*
* 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 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.
*/
/*
* Driver for the flash memory found on FORCE CPU-5V boards.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/autoconf.h>
#include <sparc/cpu.h>
#include <sparc/sparc/cpuvar.h>
int flashmatch(struct device *, void *, void *);
void flashattach(struct device *, struct device *, void *);
int flashopen(dev_t, int, int, struct proc *p);
int flashclose(dev_t, int, int, struct proc *p);
int flashread(dev_t, struct uio *, int);
int flashwrite(dev_t, struct uio *, int);
int flashrw(dev_t, struct uio *, int);
int flashioctl(dev_t, u_long, caddr_t, int, struct proc *);
/*
* We see the flash-memory in 512k windows. The current window is
* changed in the sysconfig registers (FMPCR1), see scf.c.
*/
#define FLASH_REGS_SIZE 0x80000
struct flash_regs {
u_int8_t regs[0x80000];
};
struct flash_softc {
struct device sc_dv;
struct flash_regs *sc_regs;
int sc_node;
int sc_open;
};
struct cfattach flash_ca = {
sizeof (struct flash_softc), flashmatch, flashattach
};
struct cfdriver flash_cd = {
NULL, "flash", DV_IFNET
};
int
flashmatch(parent, vcf, aux)
struct device *parent;
void *vcf, *aux;
{
struct confargs *ca = aux;
register struct romaux *ra = &ca->ca_ra;
if (strcmp("flash-memory", ra->ra_name))
return (0);
return (1);
}
void
flashattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct confargs *ca = aux;
struct flash_softc *sc = (struct flash_softc *)self;
/* map registers */
if (ca->ca_ra.ra_nreg != 1) {
printf(": expected 1 register, got %d\n", ca->ca_ra.ra_nreg);
return;
}
sc->sc_regs = mapiodev(&(ca->ca_ra.ra_reg[0]), 0,
ca->ca_ra.ra_reg[0].rr_len);
sc->sc_node = ca->ca_ra.ra_node;
printf(": window 0x%x\n", ca->ca_ra.ra_reg[0].rr_len);
}
int
flashopen(dev, flags, mode, p)
dev_t dev;
int flags;
int mode;
struct proc *p;
{
struct flash_softc *sc;
int card = 0;
if (card >= flash_cd.cd_ndevs)
return (ENXIO);
sc = flash_cd.cd_devs[card];
if (sc->sc_open)
return (EBUSY);
sc->sc_open = 1;
return (0);
}
int
flashclose(dev, flags, mode, p)
dev_t dev;
int flags;
int mode;
struct proc *p;
{
struct flash_softc *sc = flash_cd.cd_devs[0];
sc->sc_open = 0;
return (0);
}
int
flashwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (flashrw(dev, uio, flags));
}
int
flashread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (flashrw(dev, uio, flags));
}
int
flashrw(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
struct flash_softc *sc = flash_cd.cd_devs[0];
u_int cnt;
int off;
off = uio->uio_offset;
if (off >= FLASH_REGS_SIZE)
return (EFAULT);
cnt = uio->uio_resid;
if (cnt > (FLASH_REGS_SIZE - off))
cnt = FLASH_REGS_SIZE - off;
return (uiomove(&sc->sc_regs->regs[0] + off, cnt, uio));
}
int
flashioctl(dev, cmd, data, flags, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flags;
struct proc *p;
{
return (EINVAL);
}
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