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-rwxr-xr-xload_nandsim.sh123
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