From a5410dc450ec0272e578bdc7d0a33983c94aed0b Mon Sep 17 00:00:00 2001
From: Alexander Couzens <lynxis@fe80.eu>
Date: Mon, 2 Feb 2015 08:51:30 +0100
Subject: [PATCH] ectool: add write support

Use `ectool -w <addr> -z <data>` to write into ec ram

Change-Id: Id4aca045f6b7c2343be96ea474ee74033897b8b7
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: http://review.coreboot.org/8323
Tested-by: build bot (Jenkins)
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-by: Peter Stuge <peter@stuge.se>
---
 util/ectool/ectool.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/util/ectool/ectool.c b/util/ectool/ectool.c
index ab7728238f..da5143ab85 100644
--- a/util/ectool/ectool.c
+++ b/util/ectool/ectool.c
@@ -24,6 +24,7 @@
 #include <getopt.h>
 #include <sys/io.h>
 #include <ec.h>
+#include <stdlib.h>
 
 #define ECTOOL_VERSION "0.1"
 
@@ -45,12 +46,14 @@ void print_version(void)
 
 void print_usage(const char *name)
 {
- 	printf("usage: %s [-vh?Vi]\n", name);
+	printf("usage: %s [-vh?Vi] [-w 0x<addr> -z 0x<data>]\n", name);
 	printf("\n"
 	       "   -v | --version:                   print the version\n"
 	       "   -h | --help:                      print this help\n\n"
 	       "   -V | --verbose:                   print debug information\n"
 	       "   -i | --idx:                       print IDX RAM\n"
+	       "   -w <addr in hex>                  write to addr\n"
+	       "   -z <data in hex>                  write to data\n"
 	       "\n");
 	exit(1);
 }
@@ -60,6 +63,8 @@ int verbose = 0, dump_idx = 0;
 int main(int argc, char *argv[])
 {
 	int i, opt, option_index = 0;
+	long write_data = -1;
+	long write_addr = -1;
 
 	static struct option long_options[] = {
 		{"version", 0, 0, 'v'},
@@ -69,7 +74,7 @@ int main(int argc, char *argv[])
 		{0, 0, 0, 0}
 	};
 
-	while ((opt = getopt_long(argc, argv, "vh?Vi",
+	while ((opt = getopt_long(argc, argv, "vh?Viw:z:",
 				  long_options, &option_index)) != EOF) {
 		switch (opt) {
 		case 'v':
@@ -82,6 +87,12 @@ int main(int argc, char *argv[])
 		case 'i':
 			dump_idx = 1;
 			break;
+		case 'w':
+			write_addr = strtol(optarg , NULL, 16);
+			break;
+		case 'z':
+			write_data = strtol(optarg , NULL, 16);
+			break;
 		case 'h':
 		case '?':
 		default:
@@ -95,6 +106,12 @@ int main(int argc, char *argv[])
 		printf("You need to be root.\n");
 		exit(1);
 	}
+	if (write_addr >= 0 && write_data >= 0) {
+		write_addr &= 0xff;
+		write_data &= 0xff;
+		printf("\nWriting ec %02lx = %02lx\n", write_addr & 0xff, write_data & 0xff);
+		ec_write(write_addr & 0xff, write_data & 0xff);
+	}
 
 	printf("EC RAM:\n");
 	for (i = 0; i < 0x100; i++) {