diff options
Diffstat (limited to 'jedec.c')
| -rw-r--r-- | jedec.c | 37 |
1 files changed, 20 insertions, 17 deletions
@@ -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; |