nucleo-dartmonkey: Initial board offering

This board will mirror the features of dartmonkey (fingerprint MCU),
but using the Nucleo-H743ZI dev board.

This is simply a clone of nucleo-h743zi.

BRANCH=none
BUG=b:130296790
TEST=Run on nucleo. Ensure the console works.

Change-Id: I69961147a3ef455d951b664f1c92c917f806b082
Signed-off-by: Craig Hesling <hesling@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2057973
Reviewed-by: Jett Rink <jettrink@chromium.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/board/nucleo-dartmonkey/board.c b/board/nucleo-dartmonkey/board.c
new file mode 100644
index 0000000000..e06408c404
--- /dev/null
+++ b/board/nucleo-dartmonkey/board.c
@@ -0,0 +1,64 @@
+/* Copyright 2020 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.
+ */
+
+#include "common.h"
+#include "console.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "registers.h"
+#include "spi.h"
+#include "system.h"
+#include "task.h"
+#include "util.h"
+
+/**
+ * Disable restricted commands when the system is locked.
+ *
+ * @see console.h system.c
+ */
+int console_is_restricted(void)
+{
+	return system_is_locked();
+}
+
+static void ap_deferred(void)
+{
+	/*
+	 * in S3:   SLP_S3_L is 0 and SLP_S0_L is X.
+	 * in S0ix: SLP_S3_L is X and SLP_S0_L is 0.
+	 * in S0:   SLP_S3_L is 1 and SLP_S0_L is 1.
+	 * in S5/G3, the FP MCU should not be running.
+	 */
+	int running = gpio_get_level(GPIO_PCH_SLP_S3_L)
+			&& gpio_get_level(GPIO_PCH_SLP_S0_L);
+
+	if (running) { /* S0 */
+		disable_sleep(SLEEP_MASK_AP_RUN);
+		hook_notify(HOOK_CHIPSET_RESUME);
+	} else { /* S0ix/S3 */
+		hook_notify(HOOK_CHIPSET_SUSPEND);
+		enable_sleep(SLEEP_MASK_AP_RUN);
+	}
+}
+DECLARE_DEFERRED(ap_deferred);
+
+/* PCH power state changes */
+static void slp_event(enum gpio_signal signal)
+{
+	hook_call_deferred(&ap_deferred_data, 0);
+}
+
+#include "gpio_list.h"
+
+/* Initialize board. */
+static void board_init(void)
+{
+	/* Enable interrupt on PCH power signals */
+	gpio_enable_interrupt(GPIO_PCH_SLP_S3_L);
+	gpio_enable_interrupt(GPIO_PCH_SLP_S0_L);
+	/* enable the SPI slave interface if the PCH is up */
+	hook_call_deferred(&ap_deferred_data, 0);
+}
+DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);