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cfi_flash: use specific width types for cword

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This patch changes the cword union to use specific length types that are
architecture indepented.

This patch also renames the members of the cword union to represent
their usage, i.e.:

    c  -> w8
    s  -> w16
    l  -> w32
    ll -> w64

Where "w" stands for "width" in bits.

I discovered this problem when enabling CFI flash on vexpress64.
cword.l was an unsigned long int, but it was intended to be 32 bits wide.
Unfortunately, it's 64-bits wide on a 64-bit system, meaning that a
64-bit system fails when attempting to use 32-bit wide CFI flash parts.

Similar problems also existed with the other cword sizes.

Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stefan Roese <sr@denx.de>
master
Ryan Harkin 10 years ago committed by Stefan Roese
parent 677f970bc6
commit 622b95274e
2 changed files with 45 additions and 45 deletions
  1. 82
      drivers/mtd/cfi_flash.c
  2. 8
      include/mtd/cfi_flash.h

82
drivers/mtd/cfi_flash.c
Unescape View File

@ -335,34 +335,34 @@ void flash_write_cmd (flash_info_t * info, flash_sect_t sect,
switch (info->portwidth) {
case FLASH_CFI_8BIT:
debug ("fwc addr %p cmd %x %x 8bit x %d bit\n", addr, cmd,
cword.c, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
flash_write8(cword.c, addr);
cword.w8, info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
flash_write8(cword.w8, addr);
break;
case FLASH_CFI_16BIT:
debug ("fwc addr %p cmd %x %4.4x 16bit x %d bit\n", addr,
cmd, cword.w,
cmd, cword.w16,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
flash_write16(cword.w, addr);
flash_write16(cword.w16, addr);
break;
case FLASH_CFI_32BIT:
debug ("fwc addr %p cmd %x %8.8lx 32bit x %d bit\n", addr,
cmd, cword.l,
debug ("fwc addr %p cmd %x %8.8x 32bit x %d bit\n", addr,
cmd, cword.w32,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
flash_write32(cword.l, addr);
flash_write32(cword.w32, addr);
break;
case FLASH_CFI_64BIT:
#ifdef DEBUG
{
char str[20];
print_longlong (str, cword.ll);
print_longlong (str, cword.w64);
debug ("fwrite addr %p cmd %x %s 64 bit x %d bit\n",
addr, cmd, str,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
}
#endif
flash_write64(cword.ll, addr);
flash_write64(cword.w64, addr);
break;
}
@ -393,16 +393,16 @@ static int flash_isequal (flash_info_t * info, flash_sect_t sect,
debug ("is= cmd %x(%c) addr %p ", cmd, cmd, addr);
switch (info->portwidth) {
case FLASH_CFI_8BIT:
debug ("is= %x %x\n", flash_read8(addr), cword.c);
retval = (flash_read8(addr) == cword.c);
debug ("is= %x %x\n", flash_read8(addr), cword.w8);
retval = (flash_read8(addr) == cword.w8);
break;
case FLASH_CFI_16BIT:
debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w);
retval = (flash_read16(addr) == cword.w);
debug ("is= %4.4x %4.4x\n", flash_read16(addr), cword.w16);
retval = (flash_read16(addr) == cword.w16);
break;
case FLASH_CFI_32BIT:
debug ("is= %8.8x %8.8lx\n", flash_read32(addr), cword.l);
retval = (flash_read32(addr) == cword.l);
debug ("is= %8.8x %8.8x\n", flash_read32(addr), cword.w32);
retval = (flash_read32(addr) == cword.w32);
break;
case FLASH_CFI_64BIT:
#ifdef DEBUG
@ -411,11 +411,11 @@ static int flash_isequal (flash_info_t * info, flash_sect_t sect,
char str2[20];
print_longlong (str1, flash_read64(addr));
print_longlong (str2, cword.ll);
print_longlong (str2, cword.w64);
debug ("is= %s %s\n", str1, str2);
}
#endif
retval = (flash_read64(addr) == cword.ll);
retval = (flash_read64(addr) == cword.w64);
break;
default:
retval = 0;
@ -439,16 +439,16 @@ static int flash_isset (flash_info_t * info, flash_sect_t sect,
flash_make_cmd (info, cmd, &cword);
switch (info->portwidth) {
case FLASH_CFI_8BIT:
retval = ((flash_read8(addr) & cword.c) == cword.c);
retval = ((flash_read8(addr) & cword.w8) == cword.w8);
break;
case FLASH_CFI_16BIT:
retval = ((flash_read16(addr) & cword.w) == cword.w);
retval = ((flash_read16(addr) & cword.w16) == cword.w16);
break;
case FLASH_CFI_32BIT:
retval = ((flash_read32(addr) & cword.l) == cword.l);
retval = ((flash_read32(addr) & cword.w32) == cword.w32);
break;
case FLASH_CFI_64BIT:
retval = ((flash_read64(addr) & cword.ll) == cword.ll);
retval = ((flash_read64(addr) & cword.w64) == cword.w64);
break;
default:
retval = 0;
@ -680,33 +680,33 @@ static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
switch (info->portwidth) {
case FLASH_CFI_8BIT:
cword->c = c;
cword->w8 = c;
break;
case FLASH_CFI_16BIT:
#if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
w = c;
w <<= 8;
cword->w = (cword->w >> 8) | w;
cword->w16 = (cword->w16 >> 8) | w;
#else
cword->w = (cword->w << 8) | c;
cword->w16 = (cword->w16 << 8) | c;
#endif
break;
case FLASH_CFI_32BIT:
#if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
l = c;
l <<= 24;
cword->l = (cword->l >> 8) | l;
cword->w32 = (cword->w32 >> 8) | l;
#else
cword->l = (cword->l << 8) | c;
cword->w32 = (cword->w32 << 8) | c;
#endif
break;
case FLASH_CFI_64BIT:
#if defined(__LITTLE_ENDIAN) && !defined(CONFIG_SYS_WRITE_SWAPPED_DATA)
ll = c;
ll <<= 56;
cword->ll = (cword->ll >> 8) | ll;
cword->w64 = (cword->w64 >> 8) | ll;
#else
cword->ll = (cword->ll << 8) | c;
cword->w64 = (cword->w64 << 8) | c;
#endif
break;
}
@ -753,16 +753,16 @@ static int flash_write_cfiword (flash_info_t * info, ulong dest,
/* Check if Flash is (sufficiently) erased */
switch (info->portwidth) {
case FLASH_CFI_8BIT:
flag = ((flash_read8(dstaddr) & cword.c) == cword.c);
flag = ((flash_read8(dstaddr) & cword.w8) == cword.w8);
break;
case FLASH_CFI_16BIT:
flag = ((flash_read16(dstaddr) & cword.w) == cword.w);
flag = ((flash_read16(dstaddr) & cword.w16) == cword.w16);
break;
case FLASH_CFI_32BIT:
flag = ((flash_read32(dstaddr) & cword.l) == cword.l);
flag = ((flash_read32(dstaddr) & cword.w32) == cword.w32);
break;
case FLASH_CFI_64BIT:
flag = ((flash_read64(dstaddr) & cword.ll) == cword.ll);
flag = ((flash_read64(dstaddr) & cword.w64) == cword.w64);
break;
default:
flag = 0;
@ -800,16 +800,16 @@ static int flash_write_cfiword (flash_info_t * info, ulong dest,
switch (info->portwidth) {
case FLASH_CFI_8BIT:
flash_write8(cword.c, dstaddr);
flash_write8(cword.w8, dstaddr);
break;
case FLASH_CFI_16BIT:
flash_write16(cword.w, dstaddr);
flash_write16(cword.w16, dstaddr);
break;
case FLASH_CFI_32BIT:
flash_write32(cword.l, dstaddr);
flash_write32(cword.w32, dstaddr);
break;
case FLASH_CFI_64BIT:
flash_write64(cword.ll, dstaddr);
flash_write64(cword.w64, dstaddr);
break;
}
@ -1115,7 +1115,7 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
if (use_flash_status_poll(info)) {
cfiword_t cword;
void *dest;
cword.ll = 0xffffffffffffffffULL;
cword.w64 = 0xffffffffffffffffULL;
dest = flash_map(info, sect, 0);
st = flash_status_poll(info, &cword, dest,
info->erase_blk_tout, "erase");
@ -1305,7 +1305,7 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
/* handle unaligned start */
if ((aln = addr - wp) != 0) {
cword.l = 0;
cword.w32 = 0;
p = (uchar *)wp;
for (i = 0; i < aln; ++i)
flash_add_byte (info, &cword, flash_read8(p + i));
@ -1332,7 +1332,7 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
while (cnt >= info->portwidth) {
/* prohibit buffer write when buffer_size is 1 */
if (info->buffer_size == 1) {
cword.l = 0;
cword.w32 = 0;
for (i = 0; i < info->portwidth; i++)
flash_add_byte (info, &cword, *src++);
if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
@ -1359,7 +1359,7 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
}
#else
while (cnt >= info->portwidth) {
cword.l = 0;
cword.w32 = 0;
for (i = 0; i < info->portwidth; i++) {
flash_add_byte (info, &cword, *src++);
}
@ -1381,7 +1381,7 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
/*
* handle unaligned tail bytes
*/
cword.l = 0;
cword.w32 = 0;
p = (uchar *)wp;
for (i = 0; (i < info->portwidth) && (cnt > 0); ++i) {
flash_add_byte (info, &cword, *src++);

8
include/mtd/cfi_flash.h
Unescape View File

@ -105,10 +105,10 @@
#define NUM_ERASE_REGIONS 4 /* max. number of erase regions */
typedef union {
unsigned char c;
unsigned short w;
unsigned long l;
unsigned long long ll;
u8 w8;
u16 w16;
u32 w32;
u64 w64;
} cfiword_t;
/* CFI standard query structure */

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