1 files changed, 93 insertions, 0 deletions
diff --git a/chip/nrf51/system.c b/chip/nrf51/system.c
new file mode 100644
index 0000000000..293911ca28
--- /dev/null
+++ b/chip/nrf51/system.c
@@ -0,0 +1,93 @@
+/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* System module for Chrome EC : hardware specific implementation */
+
+#include "common.h"
+#include "console.h"
+#include "registers.h"
+#include "system.h"
+
+/* Console output macros */
+#define CPUTS(outstr) cputs(CC_SYSTEM, outstr)
+#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args)
+
+const char *system_get_chip_vendor(void)
+{
+	return "nrf";
+}
+
+const char *system_get_chip_name(void)
+{
+	return "nrf51822";
+}
+
+const char *system_get_chip_revision(void)
+{
+	return "";
+}
+
+void system_hibernate(uint32_t seconds, uint32_t microseconds)
+{
+	/* Flush console before hibernating */
+	cflush();
+
+	/* chip specific standby mode */
+	CPRINTS("TODO: implement %s()", __func__);
+}
+
+
+static void check_reset_cause(void)
+{
+	uint32_t flags = 0;
+	uint32_t raw_cause = NRF51_POWER_RESETREAS;
+
+	if (raw_cause & 0x00000001)
+		flags |= RESET_FLAG_RESET_PIN;
+
+	if (raw_cause & 0x00000002)
+		flags |= RESET_FLAG_WATCHDOG;
+
+	/*
+	 * According to the data sheet, this bit is set by AIRCR.SYSRESETREQ.
+	 * However, th reset from J-Link also sets this bit. This could mislead
+	 * us.
+	 */
+	if (raw_cause & 0x00000004)
+		flags |= RESET_FLAG_SOFT;
+
+	if (raw_cause & 0x00070008)
+		flags |= RESET_FLAG_OTHER;
+
+	system_set_reset_flags(flags);
+
+	/* clear it by writing 1's */
+	NRF51_POWER_RESETREAS = raw_cause;
+}
+
+
+void system_reset(int flags)
+{
+	CPRINTS("TODO: implement %s(). Infinite loop.", __func__);
+	while (1)
+		;
+}
+
+int system_get_vbnvcontext(uint8_t *block)
+{
+	CPRINTS("TODO: implement %s()", __func__);
+	return EC_ERROR_UNIMPLEMENTED;
+}
+
+int system_set_vbnvcontext(const uint8_t *block)
+{
+	CPRINTS("TODO: implement %s()", __func__);
+	return EC_ERROR_UNIMPLEMENTED;
+}
+
+void system_pre_init(void)
+{
+	check_reset_cause();
+}