| #!/bin/sh -euf |
| |
| # |
| # This script inserts NAND simulator module to emulate NAND flash of specified |
| # size. |
| # |
| # Author: Artem Bityutskiy |
| # |
| |
| fatal() |
| { |
| echo "Error: $1" 1>&2 |
| exit 1 |
| } |
| |
| usage() |
| { |
| cat 1>&2 <<EOF |
| Load NAND simulator to simulate flash of a specified size. |
| |
| Usage: ${0##*/} <size in MiB> <eraseblock size in KiB> \\ |
| <page size (512 or 2048)> |
| |
| Only the first parameter is mandatory. Default eraseblock size |
| is 16KiB, default NAND page size is 512 bytes. |
| |
| Only the following combinations are supported: |
| -------------------------------------------------- |
| | size (MiB) | EB size (KiB) | Page size (bytes) | |
| -------------------------------------------------- |
| | 16 | 16 | 512 | |
| | 32 | 16 | 512 | |
| | 64 | 16 | 512 | |
| | 128 | 16 | 512 | |
| | 256 | 16 | 512 | |
| | 64 | 64 | 2048 | |
| | 64 | 128 | 2048 | |
| | 64 | 256 | 2048 | |
| | 64 | 512 | 2048 | |
| | 128 | 64 | 2048 | |
| | 128 | 128 | 2048 | |
| | 128 | 256 | 2048 | |
| | 128 | 512 | 2048 | |
| | 256 | 64 | 2048 | |
| | 256 | 128 | 2048 | |
| | 256 | 256 | 2048 | |
| | 256 | 512 | 2048 | |
| | 512 | 64 | 2048 | |
| | 512 | 128 | 2048 | |
| | 512 | 256 | 2048 | |
| | 512 | 512 | 2048 | |
| | 1024 | 64 | 2048 | |
| | 1024 | 128 | 2048 | |
| | 1024 | 256 | 2048 | |
| | 1024 | 512 | 2048 | |
| -------------------------------------------------- |
| EOF |
| } |
| |
| if grep -q "NAND simulator" /proc/mtd; then |
| fatal "nandsim is already loaded" |
| fi |
| |
| if [ "$#" -lt "1" ]; then |
| usage |
| exit 1 |
| fi |
| |
| size="$1" |
| eb_size="$2" |
| page_size="$3" |
| if [ "$#" = "1" ]; then |
| eb_size="16" |
| page_size="512" |
| elif [ "$#" = "2" ]; then |
| page_size="512" |
| fi |
| |
| if [ "$page_size" -eq 512 ] && [ "$eb_size" -ne "16" ]; then |
| fatal "only 16KiB eraseblocks are possible in case of 512 bytes page" |
| fi |
| |
| first= |
| second= |
| third= |
| fourth= |
| |
| if [ "$page_size" -eq "512" ]; then |
| first="0x20" |
| case "$size" in |
| 16) second=0x33 ;; |
| 32) second=0x35 ;; |
| 64) second=0x36 ;; |
| 128) second=0x78 ;; |
| 256) second=0x71 ;; |
| *) fatal "flash size ${size}MiB is not supported, try 16, 32, 64 or 256" |
| esac |
| elif [ "$page_size" -eq "2048" ]; then |
| case "$eb_size" in |
| 64) fourth="0x05" ;; |
| 128) fourth="0x15" ;; |
| 256) fourth="0x25" ;; |
| 512) fourth="0x35" ;; |
| *) fatal "eraseblock ${eb_size}KiB is not supported" |
| esac |
| |
| |
| case "$size" in |
| 64) first="0x20"; second="0xa2"; third="0x00 ";; |
| 128) first="0xec"; second="0xa1"; third="0x00 ";; |
| 256) first="0x20"; second="0xaa"; third="0x00 ";; |
| 512) first="0x20"; second="0xac"; third="0x00 ";; |
| 1024) first="0xec"; second="0xd3"; third="0x51 ";; |
| *) fatal "unable to emulate ${size}MiB flash with ${eb_size}KiB eraseblock" |
| esac |
| else |
| fatal "bad NAND page size ${page_size}KiB, it has to be either 512 or 2048" |
| fi |
| |
| first="first_id_byte=$first" |
| second="second_id_byte=$second" |
| [ -z "$third" ] || third="third_id_byte=$third" |
| [ -z "$fourth" ] || fourth="fourth_id_byte=$fourth" |
| |
| modprobe nandsim "$first" "$second" $third $fourth |
| |
| echo "Loaded NAND simulator (${size}MiB, ${eb_size}KiB eraseblock, $page_size bytes NAND page)" |
