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-rw-r--r--tools/pcmcia/.gitignore2
-rw-r--r--tools/pcmcia/Makefile10
-rw-r--r--tools/pcmcia/crc32hash.c33
3 files changed, 45 insertions, 0 deletions
diff --git a/tools/pcmcia/.gitignore b/tools/pcmcia/.gitignore
new file mode 100644
index 000000000..94cb97b77
--- /dev/null
+++ b/tools/pcmcia/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+crc32hash
diff --git a/tools/pcmcia/Makefile b/tools/pcmcia/Makefile
new file mode 100644
index 000000000..eae24df1d
--- /dev/null
+++ b/tools/pcmcia/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+CC := $(CROSS_COMPILE)gcc
+CFLAGS := -I../../usr/include
+
+PROGS := crc32hash
+
+all: $(PROGS)
+
+clean:
+ rm -fr $(PROGS)
diff --git a/tools/pcmcia/crc32hash.c b/tools/pcmcia/crc32hash.c
new file mode 100644
index 000000000..1a18da9cb
--- /dev/null
+++ b/tools/pcmcia/crc32hash.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
+/* Usage example:
+$ ./crc32hash "Dual Speed"
+*/
+
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+static unsigned int crc32(unsigned char const *p, unsigned int len)
+{
+ int i;
+ unsigned int crc = 0;
+ while (len--) {
+ crc ^= *p++;
+ for (i = 0; i < 8; i++)
+ crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
+ }
+ return crc;
+}
+
+int main(int argc, char **argv) {
+ unsigned int result;
+ if (argc != 2) {
+ printf("no string passed as argument\n");
+ return -1;
+ }
+ result = crc32((unsigned char const *)argv[1], strlen(argv[1]));
+ printf("0x%x\n", result);
+ return 0;
+}