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|
/* $OpenBSD: flash.c,v 1.18 2007/12/20 05:19:38 miod Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
* 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.
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/tty.h>
#include <sys/uio.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/syslog.h>
#include <sys/fcntl.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/conf.h>
#include <machine/cpu.h>
#include <machine/mioctl.h>
#include "mc.h"
#if NMC > 0
#include <mvme68k/dev/mcreg.h>
#endif
#include <mvme68k/dev/flashreg.h>
struct flashsoftc {
struct device sc_dev;
paddr_t sc_paddr;
volatile u_char *sc_vaddr;
u_char sc_manu;
u_char sc_ii;
int sc_len;
int sc_zonesize;
};
void flashattach(struct device *, struct device *, void *);
int flashmatch(struct device *, void *, void *);
struct cfattach flash_ca = {
sizeof(struct flashsoftc), flashmatch, flashattach
};
struct cfdriver flash_cd = {
NULL, "flash", DV_DULL
};
int flashwritebyte(struct flashsoftc *sc, int addr, u_char val);
int flasherasezone(struct flashsoftc *sc, int addr);
u_char *flashsavezone(struct flashsoftc *, int);
int flashwritezone(struct flashsoftc *, u_char *, int);
struct flashii intel_flashii[] = {
{ "28F008SA", FLII_INTEL_28F008SA, 1024*1024, 64*1024 },
{ "28F008SA-L", FLII_INTEL_28F008SA_L, 1024*1024, 64*1024 },
{ "28F016SA", FLII_INTEL_28F016SA, 1024*1024, 64*1024 },
{ NULL },
};
struct flashmanu {
char *name;
u_char manu;
struct flashii *flashii;
} flashmanu[] = {
{ "intel", FLMANU_INTEL, intel_flashii },
{ NULL, 0, NULL }
};
int
flashmatch(parent, cf, args)
struct device *parent;
void *cf;
void *args;
{
struct confargs *ca = args;
#ifdef MVME147
if (cputyp == CPU_147)
return (0);
#endif
#ifdef MVME167
/*
* XXX: 166 has 4 byte-wide flash rams side-by-side, and
* isn't supported (yet).
*/
if (cputyp == CPU_166)
return (0);
if (cputyp == CPU_167)
return (0);
#endif
#ifdef MVME177
/*
* XXX: 177 has no flash.
*/
if (cputyp == CPU_177)
return (0);
#endif
if (badpaddr(ca->ca_paddr, 1))
return (0);
if (!mc_hasflash())
return 0;
return (1);
}
void
flashattach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct flashsoftc *sc = (struct flashsoftc *)self;
struct confargs *ca = args;
int manu, ident;
sc->sc_paddr = ca->ca_paddr;
sc->sc_vaddr = (volatile u_char *)mapiodev(sc->sc_paddr, NBPG);
switch (cputyp) {
#ifdef MVME162
case CPU_162:
mc_enableflashwrite(1);
break;
#endif
#ifdef MVME172
case CPU_172:
mc_enableflashwrite(1);
break;
#endif
}
/* read manufacturer and product identifier from flash */
sc->sc_vaddr[0] = FLCMD_RESET;
sc->sc_vaddr[0] = FLCMD_READII;
sc->sc_manu = sc->sc_vaddr[0];
sc->sc_ii = sc->sc_vaddr[1];
sc->sc_vaddr[0] = FLCMD_RESET;
for (manu = 0; flashmanu[manu].name; manu++)
if (flashmanu[manu].manu == sc->sc_manu)
break;
if (flashmanu[manu].name == NULL) {
printf(": unknown manu 0x%02x ident %02x\n",
sc->sc_manu, sc->sc_ii);
return;
}
for (ident = 0; flashmanu[manu].flashii[ident].name; ident++)
if (flashmanu[manu].flashii[ident].ii == sc->sc_ii)
break;
if (flashmanu[manu].flashii[ident].name == NULL) {
printf(": unknown manu %s ident 0x%02x\n",
flashmanu[manu].name, sc->sc_ii);
return;
}
sc->sc_len = flashmanu[manu].flashii[ident].size;
sc->sc_zonesize = flashmanu[manu].flashii[ident].zonesize;
printf(": %s %s len %d", flashmanu[manu].name,
flashmanu[manu].flashii[ident].name, sc->sc_len);
sc->sc_vaddr[0] = FLCMD_CLEARSTAT;
sc->sc_vaddr[0] = FLCMD_RESET;
unmapiodev((vaddr_t)sc->sc_vaddr, NBPG);
sc->sc_vaddr = (volatile u_char *)mapiodev(sc->sc_paddr, sc->sc_len);
if (sc->sc_vaddr == NULL) {
sc->sc_len = 0;
printf(" -- failed to map");
}
printf("\n");
}
u_char *
flashsavezone(sc, start)
struct flashsoftc *sc;
int start;
{
u_char *zone;
zone = (u_char *)malloc(sc->sc_zonesize, M_TEMP, M_WAITOK);
sc->sc_vaddr[0] = FLCMD_RESET;
bcopy((u_char *)&sc->sc_vaddr[start], zone, sc->sc_zonesize);
return (zone);
}
int
flashwritezone(sc, zone, start)
struct flashsoftc *sc;
u_char *zone;
int start;
{
u_char sr;
int i;
for (i = 0; i < sc->sc_zonesize; i++) {
if (zone[i] == 0xff)
continue;
sc->sc_vaddr[start + i] = FLCMD_WSETUP;
sc->sc_vaddr[start + i] = zone[i];
do {
sc->sc_vaddr[0] = FLCMD_READSTAT;
sr = sc->sc_vaddr[0];
} while ((sr & FLSR_WSMS) == 0);
if (sr & FLSR_BWS)
return (i); /* write failed on this byte! */
sc->sc_vaddr[0] = FLCMD_RESET;
}
free(zone, M_TEMP);
return (0);
}
int
flasherasezone(sc, addr)
struct flashsoftc *sc;
int addr;
{
u_char sr;
printf("erasing zone at %d\n", addr);
sc->sc_vaddr[addr] = FLCMD_ESETUP;
sc->sc_vaddr[addr] = FLCMD_ECONFIRM;
sc->sc_vaddr[0] = FLCMD_READSTAT;
sr = sc->sc_vaddr[0];
while ((sr & FLSR_WSMS) == 0) {
sc->sc_vaddr[0] = FLCMD_READSTAT;
sr = sc->sc_vaddr[0];
}
printf("sr=%2x\n", sr);
sc->sc_vaddr[0] = FLCMD_RESET;
if (sr & FLSR_ES)
return (-1);
return (0);
}
/*
* Should add some light retry code. If a write fails see if an
* erase helps the situation... eventually flash rams become
* useless but perhaps we can get just one more cycle out of it.
*/
int
flashwritebyte(sc, addr, val)
struct flashsoftc *sc;
int addr;
u_char val;
{
u_char sr;
sc->sc_vaddr[addr] = FLCMD_CLEARSTAT;
sr = sc->sc_vaddr[0];
sc->sc_vaddr[addr] = FLCMD_WSETUP;
sc->sc_vaddr[addr] = val;
delay(9);
do {
sr = sc->sc_vaddr[addr];
} while ((sr & FLSR_WSMS) == 0);
printf("write status %2x\n", sr);
sc->sc_vaddr[0] = FLCMD_RESET;
if (sr & FLSR_BWS)
return (-1); /* write failed! */
return (0);
}
/*ARGSUSED*/
int
flashopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
if (minor(dev) >= flash_cd.cd_ndevs ||
flash_cd.cd_devs[minor(dev)] == NULL)
return (ENODEV);
return (0);
}
/*ARGSUSED*/
int
flashclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
return (0);
}
/*ARGSUSED*/
int
flashioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit = minor(dev);
struct flashsoftc *sc = (struct flashsoftc *) flash_cd.cd_devs[unit];
int error = 0;
switch (cmd) {
case MIOCGSIZ:
*(int *)data = sc->sc_len;
break;
default:
error = ENOTTY;
break;
}
return (error);
}
/*ARGSUSED*/
int
flashread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
int unit = minor(dev);
struct flashsoftc *sc = (struct flashsoftc *) flash_cd.cd_devs[unit];
vaddr_t v;
int c;
struct iovec *iov;
int error = 0;
while (uio->uio_resid > 0 && error == 0) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
if (uio->uio_iovcnt < 0)
panic("flashrw");
continue;
}
v = uio->uio_offset;
c = min(iov->iov_len, MAXPHYS);
if (v + c > sc->sc_len)
c = sc->sc_len - v; /* till end of FLASH */
if (c == 0)
return (0);
error = uiomove((u_char *)sc->sc_vaddr + v, c, uio);
}
return (error);
}
/*ARGSUSED*/
int
flashwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
int unit = minor(dev);
struct flashsoftc *sc = (struct flashsoftc *) flash_cd.cd_devs[unit];
vaddr_t v;
int c, i, r;
struct iovec *iov;
int error = 0;
u_char *cmpbuf;
int neederase = 0, needwrite = 0;
int zonestart, zoneoff;
cmpbuf = (u_char *)malloc(sc->sc_zonesize, M_TEMP, M_WAITOK);
while (uio->uio_resid > 0 && error == 0) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
if (uio->uio_iovcnt < 0)
panic("flashrw");
continue;
}
/*
* constrain to be at most a zone in size, and
* aligned to be within that one zone only.
*/
v = uio->uio_offset;
zonestart = v & ~(sc->sc_zonesize - 1);
zoneoff = v & (sc->sc_zonesize - 1);
c = min(iov->iov_len, MAXPHYS);
if (v + c > sc->sc_len)
c = sc->sc_len - v; /* till end of FLASH */
if (c > sc->sc_zonesize - zoneoff)
c = sc->sc_zonesize - zoneoff; /* till end of zone */
if (c == 0)
return (0);
error = uiomove((u_char *)cmpbuf, c, uio);
/*
* compare to see if we are going to need a block erase
* operation.
*/
sc->sc_vaddr[0] = FLCMD_RESET;
for (i = 0; i < c; i++) {
u_char x = sc->sc_vaddr[v + i];
if (cmpbuf[i] & ~x)
neederase = 1;
if (cmpbuf[i] != x)
needwrite = 1;
}
if (needwrite && !neederase) {
/*
* we don't need to erase. all the bytes being
* written (thankfully) set bits.
*/
for (i = 0; i < c; i++) {
if (cmpbuf[i] == sc->sc_vaddr[v + i])
continue;
r = flashwritebyte(sc, v + i, cmpbuf[i]);
if (r == 0)
continue;
/*
* this doesn't make sense. we
* thought we didn't need to erase,
* but a write failed. let's try an
* erase operation..
*/
printf("%s: failed write at %d, trying erase\n",
sc->sc_dev.dv_xname, i);
goto tryerase;
}
} else if (neederase) {
u_char *mem;
tryerase:
mem = flashsavezone(sc, zonestart);
for (i = 0; i < c; i++)
mem[zoneoff + i] = cmpbuf[i];
flasherasezone(sc, zonestart);
r = flashwritezone(sc, mem, zonestart);
if (r) {
printf("%s: failed at offset %x\n",
sc->sc_dev.dv_xname, r);
free(mem, M_TEMP);
error = EIO;
}
}
}
free(cmpbuf, M_TEMP);
return (error);
}
paddr_t
flashmmap(dev, off, prot)
dev_t dev;
off_t off;
int prot;
{
int unit = minor(dev);
struct flashsoftc *sc = (struct flashsoftc *) flash_cd.cd_devs[unit];
/* allow access only in RAM */
if (off < 0 || off >= round_page(sc->sc_len))
return (-1);
return (atop(sc->sc_paddr + off));
}
|