diff options
| -rw-r--r-- | m29f400bt.c | 180 | ||||
| -rw-r--r-- | m29f400bt.h | 67 |
2 files changed, 247 insertions, 0 deletions
diff --git a/m29f400bt.c b/m29f400bt.c new file mode 100644 index 0000000..2011ceb --- /dev/null +++ b/m29f400bt.c @@ -0,0 +1,180 @@ +/* + * m29f400bt.c: driver for programming JEDEC standard flash parts + * + * + * Copyright 2000 Silicon Integrated System Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * Reference: + * + * $Id$ + */ + +#include "flash.h" +#include "m29f400bt.h" + +int probe_m29f400bt (struct flashchip * flash) +{ + volatile char * bios = flash->virt_addr; + unsigned char id1, id2; + + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0x90; + + myusec_delay(10); + + id1 = *(volatile unsigned char *) bios; + id2 = *(volatile unsigned char *) (bios + 0x02); + + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0xF0; + + myusec_delay(10); + + printf(__FUNCTION__ " id1 %x, id2 %x\n", id1, id2); + if (id1 == flash->manufacture_id && id2 == flash->model_id) + return 1; + + return 0; +} + +int erase_m29f400bt (struct flashchip * flash) +{ + volatile char * bios = flash->virt_addr; + + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0x80; + + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0x10; + + myusec_delay(10); + toggle_ready_m29f400bt(bios); +} + +int block_erase_m29f400bt (volatile char * bios ,volatile char * dst) +{ + + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0x80; + + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + //*(volatile char *) (bios + 0xAAA) = 0x10; + *dst = 0x30; + + myusec_delay(10); + toggle_ready_m29f400bt(bios); +} + +int write_m29f400bt (struct flashchip * flash, char * buf) +{ + int i; + int total_size = flash->total_size *1024, page_size = flash->page_size; + volatile char * bios = flash->virt_addr; + + //erase_m29f400bt (flash); + printf ("Programming Page:\n "); + /********************************* + *Pages for M29F400BT: + * 16 0x7c000 0x7ffff TOP + * 8 0x7a000 0x7bfff + * 8 0x78000 0x79fff + * 32 0x70000 0x77fff + * 64 0x60000 0x6ffff + * 64 0x50000 0x5ffff + * 64 0x40000 0x4ffff + *--------------------------------- + * 64 0x30000 0x3ffff + * 64 0x20000 0x2ffff + * 64 0x10000 0x1ffff + * 64 0x00000 0x0ffff BOTTOM + *********************************/ + printf("total_size/page_size = %d\n",total_size/page_size); + for (i = 0; i < (total_size/page_size)-1; i++) { + printf("%04d at address: 0x%08x\n", i, i * page_size); + block_erase_m29f400bt(bios, bios + i * page_size); + write_page_m29f400bt(bios, buf + i * page_size, bios + i * page_size, + page_size); + printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); + } + + printf("%04d at address: 0x%08x\n",7,0x70000); + block_erase_m29f400bt(bios , bios + 0x70000); + write_page_m29f400bt(bios,buf + 0x70000, bios + 0x70000, 32*1024); + + printf("%04d at address: 0x%08x\n",8,0x78000); + block_erase_m29f400bt(bios , bios + 0x78000); + write_page_m29f400bt(bios,buf + 0x78000, bios + 0x78000, 8*1024); + + printf("%04d at address: 0x%08x\n",9,0x7a000); + block_erase_m29f400bt(bios , bios + 0x7a000); + write_page_m29f400bt(bios,buf + 0x7a000, bios + 0x7a000, 8*1024); + + printf("%04d at address: 0x%08x\n",10,0x7c000); + block_erase_m29f400bt(bios , bios + 0x7c000); + write_page_m29f400bt(bios,buf + 0x7c000, bios + 0x7c000, 16*1024); + + printf("\n"); + //protect_m29f400bt (bios); +} + +int write_linuxbios_m29f400bt (struct flashchip * flash, char * buf) +{ + int i; + volatile char * bios = flash->virt_addr; + + printf ("Programming Page:\n "); + /********************************* + *Pages for M29F400BT: + * 16 0x7c000 0x7ffff TOP + * 8 0x7a000 0x7bfff + * 8 0x78000 0x79fff + * 32 0x70000 0x77fff + * 64 0x60000 0x6ffff + * 64 0x50000 0x5ffff + * 64 0x40000 0x4ffff + *--------------------------------- + * 64 0x30000 0x3ffff + * 64 0x20000 0x2ffff + * 64 0x10000 0x1ffff + * 64 0x00000 0x0ffff BOTTOM + *********************************/ + printf("%04d at address: 0x%08x\n",7,0x00000); + block_erase_m29f400bt(bios , bios + 0x00000); + write_page_m29f400bt(bios,buf + 0x00000, bios + 0x00000, 64*1024); + + printf("%04d at address: 0x%08x\n",7,0x10000); + block_erase_m29f400bt(bios , bios + 0x10000); + write_page_m29f400bt(bios,buf + 0x10000, bios + 0x10000, 64*1024); + + printf("%04d at address: 0x%08x\n",7,0x20000); + block_erase_m29f400bt(bios , bios + 0x20000); + write_page_m29f400bt(bios,buf + 0x20000, bios + 0x20000, 64*1024); + + printf("%04d at address: 0x%08x\n",7,0x30000); + block_erase_m29f400bt(bios , bios + 0x30000); + write_page_m29f400bt(bios,buf + 0x30000, bios + 0x30000, 64*1024); + + printf("\n"); + //protect_m29f400bt (bios); +} diff --git a/m29f400bt.h b/m29f400bt.h new file mode 100644 index 0000000..a645870 --- /dev/null +++ b/m29f400bt.h @@ -0,0 +1,67 @@ +extern int probe_m29f400bt (struct flashchip * flash); +extern int erase_m29f400bt (struct flashchip * flash); +extern int block_erase_m29f400bt (volatile char * bios, volatile char * dst); +extern int write_m29f400bt (struct flashchip * flash, char * buf); +extern int write_linuxbios_m29f400bt (struct flashchip * flash, char * buf); + +extern __inline__ void toggle_ready_m29f400bt (volatile char * dst) +{ + unsigned int i = 0; + char tmp1, tmp2; + + tmp1 = *dst & 0x40; + + while (i++ < 0xFFFFFF) { + tmp2 = *dst & 0x40; + if (tmp1 == tmp2) { + break; + } + tmp1 = tmp2; + } +} + +extern __inline__ void data_polling_m29f400bt (volatile char * dst, char data) +{ + unsigned int i = 0; + char tmp; + + data &= 0x80; + + while (i++ < 0xFFFFFF) { + tmp = *dst & 0x80; + if (tmp == data) { + break; + } + } +} + +extern __inline__ void protect_m29f400bt (volatile char * bios) +{ + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0xA0; + + usleep(200); +} + +extern __inline__ void write_page_m29f400bt (volatile char * bios, char * src, volatile char * dst, + int page_size) +{ + int i; + + for (i = 0; i < page_size; i++) { + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0xA0; + + /* transfer data from source to destination */ + *dst = *src; + //*(volatile char *) (bios) = 0xF0; + //usleep(5); + toggle_ready_m29f400bt(dst); + printf("Value in the flash at address %p = %#x, want %#x\n",dst-bios, *dst, *src); + dst++; + src++; + } + +} |
