1 files changed, 77 insertions, 0 deletions
diff --git a/board/nocturne_fp/board_ro.c b/board/nocturne_fp/board_ro.c
new file mode 100644
index 0000000000..7f20002435
--- /dev/null
+++ b/board/nocturne_fp/board_ro.c
@@ -0,0 +1,77 @@
+/* Copyright 2017 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.
+ */
+/* Meowth Fingerprint MCU configuration */
+
+#include "common.h"
+#include "hooks.h"
+#include "registers.h"
+#include "spi.h"
+#include "system.h"
+#include "task.h"
+
+#ifndef SECTION_IS_RO
+#error "This file should only be built for RO."
+#endif
+
+
+/**
+ * Disable restricted commands when the system is locked.
+ *
+ * @see console.h system.c
+ */
+int console_is_restricted(void)
+{
+	return system_is_locked();
+}
+
+#include "gpio_list.h"
+
+static void ap_deferred(void)
+{
+	/*
+	 * Behavior:
+	 * AP Active  (ex. Intel S0):   SLP_L is 1
+	 * AP Suspend (ex. Intel S0ix): SLP_L is 0
+	 * The alternative SLP_ALT_L should be pulled high at all the times.
+	 *
+	 * Legacy Intel behavior:
+	 * in S3:   SLP_ALT_L is 0 and SLP_L is X.
+	 * in S0ix: SLP_ALT_L is X and SLP_L is 0.
+	 * in S0:   SLP_ALT_L is 1 and SLP_L is 1.
+	 * in S5/G3, the FP MCU should not be running.
+	 */
+	int running = gpio_get_level(GPIO_SLP_ALT_L) &&
+		      gpio_get_level(GPIO_SLP_L);
+
+	if (running) { /* AP is S0 */
+		disable_sleep(SLEEP_MASK_AP_RUN);
+		hook_notify(HOOK_CHIPSET_RESUME);
+	} else { /* AP is suspend/S0ix/S3 */
+		hook_notify(HOOK_CHIPSET_SUSPEND);
+		enable_sleep(SLEEP_MASK_AP_RUN);
+	}
+}
+DECLARE_DEFERRED(ap_deferred);
+
+/* PCH power state changes */
+void slp_event(enum gpio_signal signal)
+{
+	hook_call_deferred(&ap_deferred_data, 0);
+}
+
+void board_init(void)
+{
+	/* Enable interrupt on PCH power signals */
+	gpio_enable_interrupt(GPIO_SLP_ALT_L);
+	gpio_enable_interrupt(GPIO_SLP_L);
+
+	/*
+	 * Enable the SPI slave interface if the PCH is up.
+	 * Do not use hook_call_deferred(), because ap_deferred() will be
+	 * called after tasks with priority higher than HOOK task (very late).
+	 */
+	ap_deferred();
+}
+DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);