diff options
Diffstat (limited to 'sst28sf040.c')
| -rw-r--r-- | sst28sf040.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/sst28sf040.c b/sst28sf040.c index d81f831..2de876b 100644 --- a/sst28sf040.c +++ b/sst28sf040.c @@ -30,8 +30,10 @@ #define RESET 0xFF #define READ_ID 0x90 -static void protect_28sf040(chipaddr bios) +static void protect_28sf040(struct flashchip *flash) { + chipaddr bios = flash->virtual_memory; + chip_readb(bios + 0x1823); chip_readb(bios + 0x1820); chip_readb(bios + 0x1822); @@ -41,8 +43,10 @@ static void protect_28sf040(chipaddr bios) chip_readb(bios + 0x040A); } -static void unprotect_28sf040(chipaddr bios) +static void unprotect_28sf040(struct flashchip *flash) { + chipaddr bios = flash->virtual_memory; + chip_readb(bios + 0x1823); chip_readb(bios + 0x1820); chip_readb(bios + 0x1822); @@ -59,7 +63,7 @@ int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned chip_writeb(AUTO_PG_ERASE1, bios); chip_writeb(AUTO_PG_ERASE2, bios + address); - /* wait for Toggle bit ready */ + /* wait for Toggle bit ready */ toggle_ready_jedec(bios); if (check_erased_range(flash, address, sector_size)) { @@ -69,12 +73,13 @@ int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned return 0; } -static int write_sector_28sf040(chipaddr bios, uint8_t *src, chipaddr dst, - unsigned int page_size) +int write_sector_28sf040(struct flashchip *flash, uint8_t *src, int start, int len) { int i; + chipaddr bios = flash->virtual_memory; + chipaddr dst = flash->virtual_memory + start; - for (i = 0; i < page_size; i++) { + for (i = 0; i < len; i++) { /* transfer data from source to destination */ if (*src == 0xFF) { dst++, src++; @@ -96,10 +101,10 @@ static int erase_28sf040(struct flashchip *flash) { chipaddr bios = flash->virtual_memory; - unprotect_28sf040(bios); + unprotect_28sf040(flash); chip_writeb(CHIP_ERASE, bios); chip_writeb(CHIP_ERASE, bios); - protect_28sf040(bios); + protect_28sf040(flash); programmer_delay(10); toggle_ready_jedec(bios); @@ -116,17 +121,14 @@ int write_28sf040(struct flashchip *flash, uint8_t *buf) int i; int total_size = flash->total_size * 1024; int page_size = flash->page_size; - chipaddr bios = flash->virtual_memory; - unprotect_28sf040(bios); + unprotect_28sf040(flash); for (i = 0; i < total_size / page_size; i++) { - /* write to the sector */ - write_sector_28sf040(bios, buf + i * page_size, - bios + i * page_size, page_size); + write_sector_28sf040(flash, buf + i * page_size, i * page_size, page_size); } - protect_28sf040(bios); + protect_28sf040(flash); return 0; } |
