[S] Change in em100[main]: Add strtohex() function

[Stefan Reinauer (Code Review)]

Attention is currently required from: Martin L Roth.

Stefan Reinauer has uploaded this change for review. ( https://review.coreboot.org/c/em100/+/77196?usp=email )

Change subject: Add strtohex() function
......................................................................

Add strtohex() function

Move hexdump.c to util.c and add strtohex from Dediprog there.

Change-Id: I02a8a84e7fbd24ab349d2164d5b9b6c17c2ac806
Signed-off-by: Stefan Reinauer 
---
M Makefile
M em100.h
R util.c
3 files changed, 24 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/em100 refs/changes/96/77196/1

diff --git a/Makefile b/Makefile
index 6503932..92a4f6b 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,7 @@
 PREFIX ?= /usr/local

XZ = xz/xz_crc32.c  xz/xz_crc64.c  xz/xz_dec_bcj.c  xz/xz_dec_lzma2.c  xz/xz_dec_stream.c
-SOURCES = em100.c firmware.c fpga.c hexdump.c sdram.c spi.c system.c trace.c usb.c
+SOURCES = em100.c firmware.c fpga.c sdram.c spi.c system.c trace.c usb.c util.c
 SOURCES += image.c curl.c chips.c tar.c ini.c $(XZ)
 OBJECTS = $(SOURCES:.c=.o)

diff --git a/em100.h b/em100.h
index 5a762cc..e74516a 100644
--- a/em100.h
+++ b/em100.h
@@ -69,8 +69,9 @@
 #define FPGA_REG_DEVID		0x40
 #define FPGA_REG_VENDID		0x42

-/* hexdump.c */
+/* util.c */
 void hexdump(const void *memory, size_t length);
+int strtohex(const char *pb_src);

/* sdram.c */
 int read_sdram(struct em100 *em100, void *data, int address, int length);
diff --git a/hexdump.c b/util.c
similarity index 82%
rename from hexdump.c
rename to util.c
index 72accfb..e60a686 100644
--- a/hexdump.c
+++ b/util.c
@@ -1,5 +1,6 @@
 /*
  * Copyright 2013-2015 Google Inc.
+ * Copyright 2023 Dediprog Inc.
  *
  * 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
@@ -14,6 +15,7 @@
 #include <stdio.h>
 #include <stdint.h>
 #include <stddef.h>
+#include <string.h>
 #include <ctype.h>
 #include "em100.h"

@@ -57,3 +59,22 @@
    	}
    }
 }
+
+int strtohex(const char *pb_src)
+{
+	char h1, h2;
+	char s1, s2;
+
+	h1 = pb_src[0];
+	h2 = pb_src[1];
+
+	s1 = toupper(h1) - 0x30;
+	if (s1 > 9)
+		s1 -= 7;
+
+	s2 = toupper(h2) - 0x30;
+	if (s2 > 9)
+		s2 -= 7;
+
+	return (s1 * 16 + s2);
+}