zork: Create baseboard variants for trembyle/dalboz

BUG=b:150110428
BRANCH=none
TEST=none

Signed-off-by: Edward Hill <ecgh@chromium.org>
Change-Id: I30503a0416325fc8573a4a62b3bc3ff943b5008e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2071390
Commit-Queue: Denis Brockus <dbrockus@chromium.org>
Reviewed-by: Denis Brockus <dbrockus@chromium.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/baseboard/zork/variant_trembyle.c b/baseboard/zork/variant_trembyle.c
new file mode 100644
index 0000000000..b8f70c6295
--- /dev/null
+++ b/baseboard/zork/variant_trembyle.c
@@ -0,0 +1,70 @@
+/* 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 "driver/retimer/ps8811.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "i2c.h"
+#include "ioexpander.h"
+
+#define CPRINTSUSB(format, args...) cprints(CC_USBCHARGE, format, ## args)
+#define CPRINTFUSB(format, args...) cprintf(CC_USBCHARGE, format, ## args)
+
+/*****************************************************************************
+ * USB-A Retimer tuning
+ */
+#define PS8811_ACCESS_RETRIES 2
+
+/* PS8811 gain tuning */
+static void ps8811_tuning_init(void)
+{
+	int rv;
+	int retry;
+
+	/* Turn on the retimers */
+	ioex_set_level(IOEX_USB_A0_RETIMER_EN, 1);
+	ioex_set_level(IOEX_USB_A1_RETIMER_EN, 1);
+
+	/* USB-A0 can run with default settings */
+	for (retry = 0; retry < PS8811_ACCESS_RETRIES; ++retry) {
+		int val;
+
+		rv = i2c_read8(I2C_PORT_USBA0,
+				PS8811_I2C_ADDR_FLAGS + PS8811_REG_PAGE1,
+				PS8811_REG1_USB_BEQ_LEVEL, &val);
+		if (!rv)
+			break;
+	}
+	if (rv) {
+		ioex_set_level(IOEX_USB_A0_RETIMER_EN, 0);
+		CPRINTSUSB("C0: PS8811 not detected");
+	}
+
+	/* USB-A1 needs to increase gain to get over MB/DB connector */
+	for (retry = 0; retry < PS8811_ACCESS_RETRIES; ++retry) {
+		rv = i2c_write8(I2C_PORT_USBA1,
+				PS8811_I2C_ADDR_FLAGS + PS8811_REG_PAGE1,
+				PS8811_REG1_USB_BEQ_LEVEL,
+				PS8811_BEQ_I2C_LEVEL_UP_13DB |
+				PS8811_BEQ_PIN_LEVEL_UP_18DB);
+		if (!rv)
+			break;
+	}
+	if (rv) {
+		ioex_set_level(IOEX_USB_A1_RETIMER_EN, 0);
+		CPRINTSUSB("C1: PS8811 not detected");
+	}
+}
+DECLARE_HOOK(HOOK_CHIPSET_STARTUP, ps8811_tuning_init, HOOK_PRIO_DEFAULT);
+
+static void ps8811_retimer_off(void)
+{
+	/* Turn on the retimers */
+	ioex_set_level(IOEX_USB_A0_RETIMER_EN, 0);
+	ioex_set_level(IOEX_USB_A1_RETIMER_EN, 0);
+}
+DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, ps8811_retimer_off, HOOK_PRIO_DEFAULT);