it8380dev: add KBC/KMSC module

1. DLM 16KB.
2. Add KBC/KMSC module for emulation board.

Signed-off-by: Dino Li <dino.li@ite.com.tw>

BRANCH=none
BUG=none
TEST=EVB + x86 MB can boot into DOS and keyboard works.

Change-Id: Ia5cc2d4f1733ce07879d410b0447b2d48e50cd95
Reviewed-on: https://chromium-review.googlesource.com/259923
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Dino Li <dino.li@ite.com.tw>
Commit-Queue: Dino Li <dino.li@ite.com.tw>

1 files changed, 138 insertions, 0 deletions

diff --git a/chip/it83xx/keyboard_raw.c b/chip/it83xx/keyboard_raw.c
new file mode 100644
index 0000000000..48749008d2
--- /dev/null
+++ b/chip/it83xx/keyboard_raw.c
@@ -0,0 +1,138 @@
+/* Copyright 2015 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 "keyboard_raw.h"
+#include "keyboard_scan.h"
+#include "registers.h"
+#include "task.h"
+#include "irq_chip.h"
+
+/*
+ * Initialize the raw keyboard interface.
+ */
+void keyboard_raw_init(void)
+{
+	/* Ensure top-level interrupt is disabled */
+	keyboard_raw_enable_interrupt(0);
+
+	/*
+	 * bit2, Setting 1 enables the internal pull-up of the KSO[15:0] pins.
+	 * To pull up KSO[17:16], set the GPCR registers of their
+	 * corresponding GPIO ports.
+	 * bit0, Setting 1 enables the open-drain mode of the KSO[17:0] pins.
+	 */
+	IT83XX_KBS_KSOCTRL = 0x05;
+
+	/* bit2, 1 enables the internal pull-up of the KSI[7:0] pins. */
+	IT83XX_KBS_KSICTRL = 0x04;
+
+	/* KSO[7:0] pins low. */
+	IT83XX_KBS_KSOL = 0x00;
+
+	/* KSO[15:8] pins low. */
+	IT83XX_KBS_KSOH1 = 0x00;
+
+#ifdef CONFIG_KEYBOARD_KSI_WUC_INT
+	/* KSI[0-7] falling-edge triggered is selected */
+	IT83XX_WUC_WUEMR3 = 0xFF;
+
+	/* W/C */
+	IT83XX_WUC_WUESR3 = 0xFF;
+
+	task_clear_pending_irq(IT83XX_IRQ_WKINTC);
+
+	/* Enable WUC for KSI[0-7] */
+	IT83XX_WUC_WUENR3 = 0xFF;
+#else
+	task_clear_pending_irq(IT83XX_IRQ_KB_MATRIX);
+#endif
+
+	keyboard_raw_enable_interrupt(1);
+}
+
+/*
+ * Finish initialization after task scheduling has started.
+ */
+void keyboard_raw_task_start(void)
+{
+#ifdef CONFIG_KEYBOARD_KSI_WUC_INT
+	IT83XX_WUC_WUESR3 = 0xFF;
+	task_clear_pending_irq(IT83XX_IRQ_WKINTC);
+	task_enable_irq(IT83XX_IRQ_WKINTC);
+#else
+	task_clear_pending_irq(IT83XX_IRQ_KB_MATRIX);
+	task_enable_irq(IT83XX_IRQ_KB_MATRIX);
+#endif
+}
+
+/*
+ * Drive the specified column low.
+ */
+test_mockable void keyboard_raw_drive_column(int col)
+{
+	int mask;
+
+	/* Tri-state all outputs */
+	if (col == KEYBOARD_COLUMN_NONE)
+		mask = 0xffff;
+	/* Assert all outputs */
+	else if (col == KEYBOARD_COLUMN_ALL)
+		mask = 0;
+	/* Assert a single output */
+	else
+		mask = 0xffff ^ (1 << col);
+
+	IT83XX_KBS_KSOL = mask & 0xff;
+	IT83XX_KBS_KSOH1 = (mask >> 8) & 0xff;
+}
+
+/*
+ * Read raw row state.
+ * Bits are 1 if signal is present, 0 if not present.
+ */
+test_mockable int keyboard_raw_read_rows(void)
+{
+	/* Bits are active-low, so invert returned levels */
+	return IT83XX_KBS_KSI ^ 0xff;
+}
+
+/*
+ * Enable or disable keyboard matrix scan interrupts.
+ */
+void keyboard_raw_enable_interrupt(int enable)
+{
+	if (enable) {
+#ifdef CONFIG_KEYBOARD_KSI_WUC_INT
+		IT83XX_WUC_WUESR3 = 0xFF;
+		task_clear_pending_irq(IT83XX_IRQ_WKINTC);
+		task_enable_irq(IT83XX_IRQ_WKINTC);
+#else
+		task_clear_pending_irq(IT83XX_IRQ_KB_MATRIX);
+		task_enable_irq(IT83XX_IRQ_KB_MATRIX);
+#endif
+	} else {
+#ifdef CONFIG_KEYBOARD_KSI_WUC_INT
+		task_disable_irq(IT83XX_IRQ_WKINTC);
+#else
+		task_disable_irq(IT83XX_IRQ_KB_MATRIX);
+#endif
+	}
+}
+
+/*
+ * Interrupt handler for keyboard matrix scan interrupt.
+ */
+void keyboard_raw_interrupt(void)
+{
+#ifdef CONFIG_KEYBOARD_KSI_WUC_INT
+	task_disable_irq(IT83XX_IRQ_WKINTC);
+#else
+	task_disable_irq(IT83XX_IRQ_KB_MATRIX);
+#endif
+
+	/* Wake the scan task */
+	task_wake(TASK_ID_KEYSCAN);
+}