File: [Development] / linux-2.6-xfs / drivers / mtd / chips / cfi_util.c (download)
Revision 1.2, Fri Oct 1 15:10:15 2004 UTC (13 years ago) by nathans.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.1: +1 -1
lines
Upgrade kernel to 2.6.9-rc3 and kdb to 4.4
Merge of 2.6.x-xfs-melb:linux:19628a by kenmcd.
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/*
* Common Flash Interface support:
* Generic utility functions not dependant on command set
*
* Copyright (C) 2002 Red Hat
* Copyright (C) 2003 STMicroelectronics Limited
*
* This code is covered by the GPL.
*
* $Id: cfi_util.c,v 1.2 2004/10/01 15:10:15 nathans.longdrop.melbourne.sgi.com Exp $
*
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mtd/map.h>
#include <linux/mtd/cfi.h>
#include <linux/mtd/compatmac.h>
struct cfi_extquery *
cfi_read_pri(struct map_info *map, __u16 adr, __u16 size, const char* name)
{
struct cfi_private *cfi = map->fldrv_priv;
__u32 base = 0; // cfi->chips[0].start;
int ofs_factor = cfi->interleave * cfi->device_type;
int i;
struct cfi_extquery *extp = NULL;
printk(" %s Extended Query Table at 0x%4.4X\n", name, adr);
if (!adr)
goto out;
/* Switch it into Query Mode */
cfi_send_gen_cmd(0x98, 0x55, base, map, cfi, cfi->device_type, NULL);
extp = kmalloc(size, GFP_KERNEL);
if (!extp) {
printk(KERN_ERR "Failed to allocate memory\n");
goto out;
}
/* Read in the Extended Query Table */
for (i=0; i<size; i++) {
((unsigned char *)extp)[i] =
cfi_read_query(map, base+((adr+i)*ofs_factor));
}
if (extp->MajorVersion != '1' ||
(extp->MinorVersion < '0' || extp->MinorVersion > '3')) {
printk(KERN_WARNING " Unknown %s Extended Query "
"version %c.%c.\n", name, extp->MajorVersion,
extp->MinorVersion);
kfree(extp);
extp = NULL;
goto out;
}
out:
/* Make sure it's in read mode */
cfi_send_gen_cmd(0xf0, 0, base, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0xff, 0, base, map, cfi, cfi->device_type, NULL);
return extp;
}
EXPORT_SYMBOL(cfi_read_pri);
void cfi_fixup(struct map_info *map, struct cfi_fixup* fixups)
{
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_fixup *f;
for (f=fixups; f->fixup; f++) {
if (((f->mfr == CFI_MFR_ANY) || (f->mfr == cfi->mfr)) &&
((f->id == CFI_ID_ANY) || (f->id == cfi->id))) {
f->fixup(map, f->param);
}
}
}
EXPORT_SYMBOL(cfi_fixup);
MODULE_LICENSE("GPL");