ectool: add query function to ectool

`ectool -q` - Query the EC IRQ byte.
Should return 0x00 otherwise the IRQ handler is usally broken or disabled.

Tested-on: Lenovo X201t

Change-Id: I0b8c2dbcf38d2eab89d0fbea05795759c4517f6d
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: http://review.coreboot.org/8382
Tested-by: build bot (Jenkins)
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-by: Peter Stuge <peter@stuge.se>

3 files changed, 20 insertions, 4 deletions

diff --git a/util/ectool/ec.c b/util/ectool/ec.c
index 0f5b891d54..323a43fe73 100644
--- a/util/ectool/ec.c
+++ b/util/ectool/ec.c
@@ -147,3 +147,9 @@ uint8_t ec_idx_read(uint16_t addr)
 
 	return inb(lpc_idx + 3);
 }
+
+uint8_t ec_query(void)
+{
+	send_ec_command(QR_EC);
+	return recv_ec_data();
+}
diff --git a/util/ectool/ec.h b/util/ectool/ec.h
index a7b10e4324..f25a3d92cb 100644
--- a/util/ectool/ec.h
+++ b/util/ectool/ec.h
@@ -50,4 +50,5 @@ int ec_write(uint8_t addr, uint8_t data);
 uint8_t ec_ext_read(uint16_t addr);
 int ec_ext_write(uint16_t addr, uint8_t data);
 uint8_t ec_idx_read(uint16_t addr);
+uint8_t ec_query(void);
 #endif
diff --git a/util/ectool/ectool.c b/util/ectool/ectool.c
index 5609c9bba9..2479633aaa 100644
--- a/util/ectool/ectool.c
+++ b/util/ectool/ectool.c
@@ -46,20 +46,21 @@ void print_version(void)
 
 void print_usage(const char *name)
 {
-	printf("usage: %s [-vh?Vid] [-w 0x<addr> -z 0x<data>]\n", name);
+	printf("usage: %s [-vh?Vidq] [-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"
 	       "   -d | --dump:                      print RAM\n"
 	       "   -i | --idx:                       print IDX RAM & RAM\n"
+	       "   -q | --query:                     print query byte\n"
 	       "   -w <addr in hex>                  write to addr\n"
 	       "   -z <data in hex>                  write to data\n"
 	       "\n");
 	exit(1);
 }
 
-int verbose = 0, dump_idx = 0, dump_ram = 0;
+int verbose = 0, dump_idx = 0, dump_ram = 0, dump_query = 0;
 
 int main(int argc, char *argv[])
 {
@@ -72,10 +73,11 @@ int main(int argc, char *argv[])
 		{"help", 0, 0, 'h'},
 		{"verbose", 0, 0, 'V'},
 		{"idx", 0, 0, 'i'},
+		{"query", 0, 0, 'q'},
 		{0, 0, 0, 0}
 	};
 
-	while ((opt = getopt_long(argc, argv, "vh?Vidw:z:",
+	while ((opt = getopt_long(argc, argv, "vh?Vidqw:z:",
 				  long_options, &option_index)) != EOF) {
 		switch (opt) {
 		case 'v':
@@ -98,6 +100,9 @@ int main(int argc, char *argv[])
 		case 'd':
 			dump_ram = 1;
 			break;
+		case 'q':
+			dump_query = 1;
+			break;
 		case 'h':
 		case '?':
 		default:
@@ -119,7 +124,7 @@ int main(int argc, char *argv[])
 	}
 
 	/* preserve default - dump_ram if nothing selected */
-	if (!dump_ram && !dump_idx) {
+	if (!dump_ram && !dump_idx && !dump_query) {
 		dump_ram = 1;
 	}
 
@@ -133,6 +138,10 @@ int main(int argc, char *argv[])
 		printf("\n\n");
 	}
 
+	if (dump_query) {
+		printf("EC QUERY %02x\n", ec_query());
+	}
+
 	if (dump_idx) {
 		printf("EC IDX RAM:\n");
 		for (i = 0; i < 0x10000; i++) {