marzipan: Initial EC image

Create the initial EC image for the marzipan variant by copying
the lazor reference board EC files into a new directory named for
the variant.

(Auto-Generated by create_initial_ec_image.sh version 1.5.0).

BUG=b:182018606
BRANCH=firmware-trogdor-13577.B-master
TEST=make BOARD=marzipan

Signed-off-by: Devin Lu <Devin.Lu@quantatw.com>
Change-Id: I8d15d2de1d104d85c12b86a7f2137d17bf2f2bdd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2780455
Reviewed-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Wai-Hong Tam <waihong@google.com>
Commit-Queue: Wai-Hong Tam <waihong@google.com>

1 files changed, 128 insertions, 0 deletions

diff --git a/board/marzipan/switchcap.c b/board/marzipan/switchcap.c
new file mode 100644
index 0000000000..3d5255791c
--- /dev/null
+++ b/board/marzipan/switchcap.c
@@ -0,0 +1,128 @@
+/* Copyright 2021 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 "config.h"
+#include "console.h"
+#include "driver/ln9310.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "i2c.h"
+#include "power/sc7180.h"
+#include "system.h"
+
+#define CPRINTS(format, args...) cprints(CC_I2C, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_I2C, format, ## args)
+
+/* LN9310 switchcap */
+const struct ln9310_config_t ln9310_config = {
+	.i2c_port = I2C_PORT_POWER,
+	.i2c_addr_flags = LN9310_I2C_ADDR_0_FLAGS,
+};
+
+static int board_has_ln9310(void)
+{
+	static int ln9310_present = -1;
+	int status, val;
+
+	/* Cache the status of LN9310 present or not */
+	if (ln9310_present == -1) {
+		status = i2c_read8(ln9310_config.i2c_port,
+				   ln9310_config.i2c_addr_flags,
+				   LN9310_REG_CHIP_ID,
+				   &val);
+
+		/*
+		 * Any error reading LN9310 CHIP_ID over I2C means the chip
+		 * not present. Fallback to use DA9313 switchcap.
+		 */
+		ln9310_present = !status && val == LN9310_CHIP_ID;
+	}
+
+	return ln9310_present;
+}
+
+static void switchcap_init(void)
+{
+	if (board_has_ln9310()) {
+		CPRINTS("Use switchcap: LN9310");
+
+		/* Configure and enable interrupt for LN9310 */
+		gpio_set_flags(GPIO_SWITCHCAP_PG_INT_L, GPIO_INT_FALLING);
+		gpio_enable_interrupt(GPIO_SWITCHCAP_PG_INT_L);
+
+		/*
+		 * Configure LN9310 enable, open-drain output. Don't set the
+		 * level here; otherwise, it will override its value and
+		 * shutdown the switchcap when sysjump to RW.
+		 *
+		 * Note that the gpio.inc configures it GPIO_OUT_LOW. When
+		 * sysjump to RW, will output push-pull a short period of
+		 * time. As it outputs LOW, should be fine.
+		 *
+		 * This GPIO changes like:
+		 * (1) EC boots from RO -> high-Z
+		 * (2) GPIO init according to gpio.inc -> push-pull LOW
+		 * (3) This function configures it -> open-drain HIGH
+		 * (4) Power sequence turns on the switchcap -> open-drain LOW
+		 * (5) EC sysjumps to RW
+		 * (6) GPIO init according to gpio.inc -> push-pull LOW
+		 * (7) This function configures it -> open-drain LOW
+		 */
+		gpio_set_flags(GPIO_SWITCHCAP_ON_L,
+			       GPIO_OUTPUT | GPIO_OPEN_DRAIN);
+
+		/* Only configure the switchcap if not sysjump */
+		if (!system_jumped_late()) {
+			/*
+			 * Deassert the enable pin (set it HIGH), so the
+			 * switchcap won't be enabled after the switchcap is
+			 * configured from standby mode to switching mode.
+			 */
+			gpio_set_level(GPIO_SWITCHCAP_ON_L, 1);
+			ln9310_init();
+		}
+	} else {
+		CPRINTS("Use switchcap: DA9313");
+
+		/*
+		 * When the chip in power down mode, it outputs high-Z.
+		 * Set pull-down to avoid floating.
+		 */
+		gpio_set_flags(GPIO_DA9313_GPIO0, GPIO_INPUT | GPIO_PULL_DOWN);
+
+		/*
+		 * Configure DA9313 enable, push-pull output. Don't set the
+		 * level here; otherwise, it will override its value and
+		 * shutdown the switchcap when sysjump to RW.
+		 */
+		gpio_set_flags(GPIO_SWITCHCAP_ON, GPIO_OUTPUT);
+	}
+}
+DECLARE_HOOK(HOOK_INIT, switchcap_init, HOOK_PRIO_DEFAULT);
+
+void board_set_switchcap_power(int enable)
+{
+	if (board_has_ln9310())
+		gpio_set_level(GPIO_SWITCHCAP_ON_L, !enable);
+	else
+		gpio_set_level(GPIO_SWITCHCAP_ON, enable);
+}
+
+int board_is_switchcap_enabled(void)
+{
+	if (board_has_ln9310())
+		return !gpio_get_level(GPIO_SWITCHCAP_ON_L);
+	else
+		return gpio_get_level(GPIO_SWITCHCAP_ON);
+}
+
+int board_is_switchcap_power_good(void)
+{
+	if (board_has_ln9310())
+		return ln9310_power_good();
+	else
+		return gpio_get_level(GPIO_DA9313_GPIO0);
+}