NetBSD/sys/arch/macppc/dev/nvram.c

206 lines
4.6 KiB
C

/* $NetBSD: nvram.c,v 1.9 2003/07/15 02:43:29 lukem Exp $ */
/*-
* Copyright (C) 1998 Internet Research Institute, Inc.
* 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
* Internet Research Institute, Inc.
* 4. The name of the author may not 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 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nvram.c,v 1.9 2003/07/15 02:43:29 lukem Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/event.h>
#include <machine/autoconf.h>
#include <machine/pio.h>
#define NVRAM_NONE 0
#define NVRAM_IOMEM 1
#define NVRAM_PORT 2
#define NVRAM_SIZE 0x2000
static void nvram_attach __P((struct device *, struct device *, void *));
static int nvram_match __P((struct device *, struct cfdata *, void *));
struct nvram_softc {
struct device sc_dev;
int nv_type;
char *nv_port;
char *nv_data;
};
CFATTACH_DECL(nvram, sizeof(struct nvram_softc),
nvram_match, nvram_attach, NULL, NULL);
extern struct cfdriver nvram_cd;
dev_type_read(nvramread);
dev_type_write(nvramwrite);
dev_type_mmap(nvrammmap);
const struct cdevsw nvram_cdevsw = {
nullopen, nullclose, nvramread, nvramwrite, noioctl,
nostop, notty, nopoll, nvrammmap, nokqfilter,
};
int
nvram_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct confargs *ca = aux;
if (strcmp(ca->ca_name, "nvram") != 0)
return 0;
if (ca->ca_nreg == 0)
return 0;
return 1;
}
void
nvram_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct nvram_softc *sc = (struct nvram_softc *)self;
struct confargs *ca = aux;
int *reg = ca->ca_reg;
printf("\n");
switch (ca->ca_nreg) {
case 8: /* untested */
sc->nv_type = NVRAM_IOMEM;
sc->nv_data = mapiodev(ca->ca_baseaddr + reg[0], reg[1]);
break;
case 16:
sc->nv_type = NVRAM_PORT;
sc->nv_port = mapiodev(ca->ca_baseaddr + reg[0], reg[1]);
sc->nv_data = mapiodev(ca->ca_baseaddr + reg[2], reg[3]);
break;
case 0:
default:
sc->nv_type = NVRAM_NONE;
return;
}
}
int
nvramread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct nvram_softc *sc;
u_int off, cnt;
int i;
int error = 0;
char *buf;
sc = nvram_cd.cd_devs[0];
off = uio->uio_offset;
cnt = uio->uio_resid;
if (off > NVRAM_SIZE || cnt > NVRAM_SIZE)
return EFAULT;
if (off + cnt > NVRAM_SIZE)
cnt = NVRAM_SIZE - off;
buf = malloc(NVRAM_SIZE, M_DEVBUF, M_WAITOK);
if (buf == NULL) {
error = EAGAIN;
goto out;
}
switch (sc->nv_type) {
case NVRAM_IOMEM:
for (i = 0; i < NVRAM_SIZE; i++)
buf[i] = sc->nv_data[i * 16];
break;
case NVRAM_PORT:
for (i = 0; i < NVRAM_SIZE; i += 32) {
int j;
out8(sc->nv_port, i / 32);
for (j = 0; j < 32; j++) {
buf[i + j] = sc->nv_data[j * 16];
}
}
break;
default:
goto out;
}
error = uiomove(buf + off, cnt, uio);
out:
if (buf)
free(buf, M_DEVBUF);
return error;
}
int
nvramwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
return ENXIO;
}
paddr_t
nvrammmap(dev, off, prot)
dev_t dev;
off_t off;
int prot;
{
return -1;
}