diff options
| -rwxr-xr-x | load_nandsim.sh | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/load_nandsim.sh b/load_nandsim.sh new file mode 100755 index 0000000..bda3c79 --- /dev/null +++ b/load_nandsim.sh @@ -0,0 +1,123 @@ +#!/bin/bash + +# +# This script inserts NAND simulator module to emulate NAND flash of specified +# size. +# +# Author: Artem Bityutskiy +# + +# Check if nandsim module is loaded +function nandsim_loaded() +{ + local NANDSIM=`lsmod | grep nandsim` + if [ -n "$NANDSIM" ]; then + return 1 + fi + return 0 +} + +nandsim_loaded +if (( $? != 0 )); then + echo "Error: nandsim is already loaded" + exit 1 +fi + +if (( $# < 1 )); then + echo "Load NAND simulator to simulate flash of a specified size." + echo "" + echo "Usage: ./load_nandsim.sh <size in MiB> <eraseblock size in KiB>" + echo " <page size (512 or 2048)>" + echo "" + echo "Only the first parameter is mandatory. Default eraseblock size" + echo "is 16KiB, default NAND page size is 512 bytes." + echo "" + echo "Only the following combinations are supported:" + echo "--------------------------------------------------" + echo "| size (MiB) | EB size (KiB) | Page size (bytes) |" + echo "--------------------------------------------------" + echo "| 16 | 16 | 512 |" + echo "| 32 | 16 | 512 |" + echo "| 64 | 16 | 512 |" + echo "| 128 | 16 | 512 |" + echo "| 256 | 16 | 512 |" + echo "| 64 | 64 | 2048 |" + echo "| 64 | 128 | 2048 |" + echo "| 64 | 256 | 2048 |" + echo "| 64 | 512 | 2048 |" + echo "| 128 | 64 | 2048 |" + echo "| 128 | 128 | 2048 |" + echo "| 128 | 256 | 2048 |" + echo "| 128 | 512 | 2048 |" + echo "| 256 | 64 | 2048 |" + echo "| 256 | 128 | 2048 |" + echo "| 256 | 256 | 2048 |" + echo "| 256 | 512 | 2048 |" + echo "| 512 | 64 | 2048 |" + echo "| 512 | 128 | 2048 |" + echo "| 512 | 256 | 2048 |" + echo "| 512 | 512 | 2048 |" + echo "| 1024 | 64 | 2048 |" + echo "| 1024 | 128 | 2048 |" + echo "| 1024 | 256 | 2048 |" + echo "| 1024 | 512 | 2048 |" + echo "--------------------------------------------------" + exit 1 +fi + +SZ=$1 +EBSZ=$2 +PGSZ=$3 +if [[ $# == '1' ]]; then + EBSZ=16 + PGSZ=512 +elif [[ $# == '2' ]]; then + PGSZ=512 +fi + +if (( $PGSZ == 512 && $EBSZ != 16 )); then + echo "Error: only 16KiB eraseblocks are possible in case of 512 bytes page" + exit 1 +fi + +if (( $PGSZ == 512 )); then + case $SZ in + 16) modprobe nandsim first_id_byte=0x20 second_id_byte=0x33 ;; + 32) modprobe nandsim first_id_byte=0x20 second_id_byte=0x35 ;; + 64) modprobe nandsim first_id_byte=0x20 second_id_byte=0x36 ;; + 128) modprobe nandsim first_id_byte=0x20 second_id_byte=0x78 ;; + 256) modprobe nandsim first_id_byte=0x20 second_id_byte=0x71 ;; + *) echo "Flash size ${SZ}MiB is not supported, try 16, 32, 64 or 256" + exit 1 ;; + esac +elif (( $PGSZ == 2048 )); then + case $EBSZ in + 64) FOURTH=0x05 ;; + 128) FOURTH=0x15 ;; + 256) FOURTH=0x25 ;; + 512) FOURTH=0x35 ;; + *) echo "Eraseblock ${EBSZ}KiB is not supported" + exit 1 + esac + + case $SZ in + 64) modprobe nandsim first_id_byte=0x20 second_id_byte=0xa2 third_id_byte=0x00 fourth_id_byte=$FOURTH ;; + 128) modprobe nandsim first_id_byte=0xec second_id_byte=0xa1 third_id_byte=0x00 fourth_id_byte=$FOURTH ;; + 256) modprobe nandsim first_id_byte=0x20 second_id_byte=0xaa third_id_byte=0x00 fourth_id_byte=$FOURTH ;; + 512) modprobe nandsim first_id_byte=0x20 second_id_byte=0xac third_id_byte=0x00 fourth_id_byte=$FOURTH ;; + 1024) modprobe nandsim first_id_byte=0xec second_id_byte=0xd3 third_id_byte=0x51 fourth_id_byte=$FOURTH ;; + *) echo "Unable to emulate ${SZ}MiB flash with ${EBSZ}KiB eraseblock" + exit 1 + esac +else + echo "Error: bad NAND page size ${PGSZ}KiB, it has to be either 512 or 2048" + exit 1 +fi + +if (( $? != 0 )); then + echo "Error: cannot load nandsim" + exit 1 +fi + +echo "Loaded NAND simulator (${SZ}MiB, ${EBSZ}KiB eraseblock, $PGSZ bytes NAND page)" +exit 0 |