baseboard/asurada: refactor to support baseboard build

guidelines:
1. sensors are in the board, since this may changes most of the time
2. PPC/Charger/BC12/TCPC/PD are in the baseboard, this is unlikely
   changing
3. sub-board detection is in the baseboard
4. power signals, power sequence are in the baseboard
5. ADC/PWM this might change, but we keep them in the baseboard for now
6. it5205_sbu is not currently used for now, move it to baseboard
7. battery, led are kept in the board

BUG=b:178439840
TEST=boot hayato to OS
BRANCH=none

Change-Id: I21bf5d1f7901a10c3538ad5646362f2b402652af
Signed-off-by: Eric Yilun Lin <yllin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2675328
Reviewed-by: Ting Shen <phoenixshen@chromium.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/baseboard/asurada/it5205_sbu.c b/baseboard/asurada/it5205_sbu.c
new file mode 100644
index 0000000000..9ee59a5cc3
--- /dev/null
+++ b/baseboard/asurada/it5205_sbu.c
@@ -0,0 +1,68 @@
+/* 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.
+ *
+ * IT5205 Type-C SBU OVP handler
+ */
+
+#include "console.h"
+#include "hooks.h"
+#include "it5205.h"
+#include "stdbool.h"
+#include "timer.h"
+#include "usb_mux.h"
+
+#define CPRINTS(format, args...) cprints(CC_USB, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_USB, format, ## args)
+
+#define OVP_RETRY_DELAY_US_MIN (100 * MSEC)
+
+static unsigned int ovp_retry_delay_us = OVP_RETRY_DELAY_US_MIN;
+
+static void reset_retry_delay(void)
+{
+	CPRINTS("IT5205 SBU OVP cleared");
+	ovp_retry_delay_us = OVP_RETRY_DELAY_US_MIN;
+}
+DECLARE_DEFERRED(reset_retry_delay);
+
+static void reset_csbu(void)
+{
+	/* double the retry time up to 1 minute */
+	ovp_retry_delay_us = MIN(ovp_retry_delay_us * 2, MINUTE);
+	/* and reset it if interrupt not triggered in a short period */
+	hook_call_deferred(&reset_retry_delay_data, 500 * MSEC);
+
+	/* re-enable sbu interrupt */
+	it5205h_enable_csbu_switch(&usb_muxes[0], false);
+	it5205h_enable_csbu_switch(&usb_muxes[0], true);
+}
+DECLARE_DEFERRED(reset_csbu);
+
+static void it5205h_hook_ac_change(void)
+{
+	int reg;
+
+	/* Check if the board has IT5205H, and read its ovp status */
+	if (i2c_read8(I2C_PORT_USB_MUX0, IT5205H_SBU_I2C_ADDR_FLAGS,
+		      IT5205H_REG_ISR, &reg))
+		return;
+
+	/*
+	 * Re-poll ovp status immediately if AC detached, because ovp will
+	 * likely be recovered.
+	 *
+	 * Always perform the re-poll even when this hook is triggered by
+	 * unrelated events.
+	 */
+	if (reg & IT5205H_ISR_CSBU_OVP)
+		hook_call_deferred(&reset_csbu_data, 0);
+}
+DECLARE_HOOK(HOOK_AC_CHANGE, it5205h_hook_ac_change, HOOK_PRIO_DEFAULT);
+
+void it5205h_sbu_interrupt(enum gpio_signal signal)
+{
+	CPRINTS("IT5205 SBU OVP triggered");
+	hook_call_deferred(&reset_csbu_data, ovp_retry_delay_us);
+	hook_call_deferred(&reset_retry_delay_data, -1);
+}