/* chunksize is 1 */
int write_m29f400bt(struct flashctx *flash, uint8_t *src, unsigned int start,
unsigned int len)
{
int i;
chipaddr bios = flash->virtual_memory;
chipaddr dst = flash->virtual_memory + start;
for (i = 0; i < len; i++) {
chip_writeb(flash, 0xAA, bios + 0xAAA);
chip_writeb(flash, 0x55, bios + 0x555);
chip_writeb(flash, 0xA0, bios + 0xAAA);
/* transfer data from source to destination */
chip_writeb(flash, *src, dst);
toggle_ready_jedec(flash, dst);
#if 0
/* We only want to print something in the error case. */
msg_cerr("Value in the flash at address 0x%lx = %#x, want %#x\n",
(dst - bios), chip_readb(flash, dst), *src);
#endif
dst++;
src++;
}
/* FIXME: Ignore errors for now. */
return 0;
}
int erase_sst_fwhub_block(struct flashchip *flash, int offset)
{
volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;
// clear write protect
*(wrprotect) = 0;
erase_block_jedec(flash->virtual_memory, offset);
toggle_ready_jedec(flash->virtual_memory);
return (0);
}
static int erase_28sf040(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
chip_writeb(CHIP_ERASE, bios);
chip_writeb(CHIP_ERASE, bios);
programmer_delay(10);
toggle_ready_jedec(bios);
if (check_erased_range(flash, 0, flash->total_size * 1024)) {
msg_cerr("ERASE FAILED!\n");
return -1;
}
return 0;
}
int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned int sector_size)
{
chipaddr bios = flash->virtual_memory;
/* This command sequence is very similar to erase_block_82802ab. */
chip_writeb(AUTO_PG_ERASE1, bios);
chip_writeb(AUTO_PG_ERASE2, bios + address);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
if (check_erased_range(flash, address, sector_size)) {
msg_cerr("ERASE FAILED!\n");
return -1;
}
return 0;
}
int erase_jedec (struct flashchip * flash)
{
volatile char * bios = flash->virt_addr;
*(volatile char *) (bios + 0x5555) = 0xAA;
*(volatile char *) (bios + 0x2AAA) = 0x55;
*(volatile char *) (bios + 0x5555) = 0x80;
*(volatile char *) (bios + 0x5555) = 0xAA;
*(volatile char *) (bios + 0x2AAA) = 0x55;
*(volatile char *) (bios + 0x5555) = 0x10;
myusec_delay(10);
toggle_ready_jedec(bios);
return(0);
}
int erase_m29f400bt(struct flashctx *flash)
{
chipaddr bios = flash->virtual_memory;
chip_writeb(flash, 0xAA, bios + 0xAAA);
chip_writeb(flash, 0x55, bios + 0x555);
chip_writeb(flash, 0x80, bios + 0xAAA);
chip_writeb(flash, 0xAA, bios + 0xAAA);
chip_writeb(flash, 0x55, bios + 0x555);
chip_writeb(flash, 0x10, bios + 0xAAA);
programmer_delay(10);
toggle_ready_jedec(flash, bios);
/* FIXME: Check the status register for errors. */
return 0;
}
int block_erase_m29f400bt(struct flashctx *flash, unsigned int start,
unsigned int len)
{
chipaddr bios = flash->virtual_memory;
chipaddr dst = bios + start;
chip_writeb(flash, 0xAA, bios + 0xAAA);
chip_writeb(flash, 0x55, bios + 0x555);
chip_writeb(flash, 0x80, bios + 0xAAA);
chip_writeb(flash, 0xAA, bios + 0xAAA);
chip_writeb(flash, 0x55, bios + 0x555);
chip_writeb(flash, 0x30, dst);
programmer_delay(10);
toggle_ready_jedec(flash, bios);
/* FIXME: Check the status register for errors. */
return 0;
}
/* chunksize is 1 */
int write_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 < len; i++) {
/* transfer data from source to destination */
if (*src == 0xFF) {
dst++, src++;
/* If the data is 0xFF, don't program it */
continue;
}
/*issue AUTO PROGRAM command */
chip_writeb(AUTO_PGRM, dst);
chip_writeb(*src++, dst++);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
}
return 0;
}
