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-rw-r--r--jedec.c37
1 files changed, 20 insertions, 17 deletions
diff --git a/jedec.c b/jedec.c
index 19a233b..0344b69 100644
--- a/jedec.c
+++ b/jedec.c
@@ -89,6 +89,7 @@ int erase_sector_jedec(volatile unsigned char *bios, unsigned int page)
return (0);
}
+
int erase_block_jedec(volatile unsigned char *bios, unsigned int block)
{
volatile unsigned char *Temp;
@@ -149,43 +150,45 @@ int erase_chip_jedec(struct flashchip *flash)
return (0);
}
-void write_page_write_jedec(volatile unsigned char *bios, unsigned char *src,
- volatile unsigned char *dst, int page_size)
+int write_page_write_jedec(volatile unsigned char *bios, unsigned char *src,
+ volatile unsigned char *dst, int page_size)
{
int i;
/* Issue JEDEC Data Unprotect comand */
- *(volatile char *) (bios + 0x5555) = 0xAA;
- *(volatile char *) (bios + 0x2AAA) = 0x55;
- *(volatile char *) (bios + 0x5555) = 0xA0;
+ *(volatile unsigned char *) (bios + 0x5555) = 0xAA;
+ *(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
+ *(volatile unsigned char *) (bios + 0x5555) = 0xA0;
+ /* transfer data from source to destination */
for (i = 0; i < page_size; i++) {
- /* transfer data from source to destination */
+ /* If the data is 0xFF, don't program it */
+ if (*src == 0xFF)
+ continue;
*dst++ = *src++;
}
- usleep(100);
toggle_ready_jedec(dst - 1);
+
+ return 0;
}
int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src,
volatile unsigned char *dst)
{
- volatile unsigned char *Temp;
-
- /* transfer data from source to destination */
+ /* If the data is 0xFF, don't program it */
if (*src == 0xFF) {
- /* If the data is 0xFF, don't program it */
return 0;
}
+
/* Issue JEDEC Byte Program command */
- Temp = bios + 0x5555;
- *Temp = 0xAA;
- Temp = bios + 0x2AAA;
- *Temp = 0x55;
- Temp = bios + 0x5555;
- *Temp = 0xA0;
+ *(volatile unsigned char *) (bios + 0x5555) = 0xAA;
+ *(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
+ *(volatile unsigned char *) (bios + 0x5555) = 0xA0;
+
+ /* transfer data from source to destination */
*dst = *src;
+
toggle_ready_jedec(bios);
return 0;
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