rambi: Add DIRQs for trackpad and touchscreen

Also add the relevant info about these pins to the ASL tables + add
SMBIOS type 41 data for these parts.

BUG=chrome-os-partner:22863
TEST=Manual on Rambi. Set some pins to GPIO_DIRQ, and then verify DIRQ
regwrites w/ GPIO_DEBUG look correct.

Change-Id: Id40655f9fb2ea7b10e1ff58d0b2a8b4cc6f05ff8
Reviewed-on: https://chromium-review.googlesource.com/176299
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Shawn Nematbakhsh <shawnn@chromium.org>
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Tested-by: Shawn Nematbakhsh <shawnn@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4963
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

src/mainboard/google/rambi/acpi/mainboard.asl

@@ -19,6 +19,8 @@
  * MA 02110-1301 USA
  */
 
+#include <mainboard/google/rambi/onboard.h>
+
 Scope (\_SB)
 {
 	Device (LID0)
@@ -35,4 +37,74 @@ Scope (\_SB)
 	{
 		Name(_HID, EisaId("PNP0C0C"))
 	}
+
+	Device (TPAD)
+	{
+		Name (_ADR, 0x0)
+		Name (_UID, 1)
+
+		// Report as a Sleep Button device so Linux will
+		// automatically enable it as a wake source
+		Name (_HID, EisaId("PNP0C0E"))
+
+		Name (_CRS, ResourceTemplate()
+		{
+			Interrupt (ResourceConsumer, Edge, ActiveLow)
+			{
+				BOARD_TRACKPAD_IRQ
+			}
+
+			VendorShort (ADDR)
+			{
+				BOARD_TRACKPAD_I2C_ADDR
+			}
+		})
+
+		Name (_PRW, Package() { BOARD_TRACKPAD_WAKE_GPIO, 0x3 })
+
+		Method (_DSW, 3, NotSerialized)
+		{
+			Store (BOARD_TRACKPAD_WAKE_GPIO, Local0)
+
+			If (LEqual (Arg0, 1)) {
+				// Enable GPIO as wake source
+				// \_SB.PCI0.LPCB.GWAK (Local0)
+			}
+		}
+	}
+
+	Device (TSCR)
+	{
+		Name (_ADR, 0x0)
+		Name (_UID, 2)
+
+		// Report as a Sleep Button device so Linux will
+		// automatically enable it as a wake source
+		Name (_HID, EisaId("PNP0C0E"))
+
+		Name (_CRS, ResourceTemplate()
+		{
+			Interrupt (ResourceConsumer, Edge, ActiveLow)
+			{
+				BOARD_TOUCHSCREEN_IRQ
+			}
+
+			VendorShort (ADDR)
+			{
+				BOARD_TOUCHSCREEN_I2C_ADDR
+			}
+		})
+
+		Name (_PRW, Package() { BOARD_TOUCHSCREEN_WAKE_GPIO, 0x3 })
+
+		Method (_DSW, 3, NotSerialized)
+		{
+			Store (BOARD_TOUCHSCREEN_WAKE_GPIO, Local0)
+
+			If (LEqual (Arg0, 1)) {
+				// Enable GPIO as wake source
+				// \_SB.PCI0.LPCB.GWAK (Local0)
+			}
+		}
+	}
 }

src/mainboard/google/rambi/gpio.c

@@ -19,6 +19,7 @@
 
 #include <stdlib.h>
 #include <baytrail/gpio.h>
+#include "irqroute.h"
 
 /* TODO(SHAWNN): Modify gpios labeled 'INT' for interrupt handling */
 /* NCORE GPIOs */
@@ -110,7 +111,7 @@ static const struct soc_gpio_map gpscore_gpio_map[] = {
 	GPIO_NC,	/* S0-SC052 - SMB_SOC_CLK (XDP) */
 	GPIO_NC,	/* S0-SC053 - SMB_SOC_ALERTB (NC) */
 	GPIO_DEFAULT,	/* S0-SC054 - NC */
-	GPIO_INPUT,	/* S0-SC055 - TRACKPAD_INT_DX - INT */
+	GPIO_DIRQ,	/* S0-SC055 - TRACKPAD_INT_DX */
 	GPIO_INPUT,	/* S0-SC056 - GPIO_S0_SC_56 - STRAP */
 	GPIO_FUNC1,	/* S0-SC057 - PCH_UART_TXD */
 	GPIO_INPUT,	/* S0-SC058 - SIM_DET_C */
@@ -127,7 +128,7 @@ static const struct soc_gpio_map gpscore_gpio_map[] = {
 	GPIO_FUNC1,	/* S0-SC069 - SIO_SPI_CLK */
 	GPIO_INPUT,	/* S0-SC070 - ALS_INT_L - INT */
 	GPIO_NC,	/* S0-SC071 - NC */
-	GPIO_INPUT,	/* S0-SC072 - TOUCH_INT_L_DX - INT */
+	GPIO_DIRQ,	/* S0-SC072 - TOUCH_INT_L_DX */
 	GPIO_NC,	/* S0-SC073 - NC */
 	GPIO_NC,	/* S0-SC074 - SIO_UART2_RXD (NC) */
 	GPIO_NC,	/* S0-SC075 - SIO_UART2_TXD (NC) */
@@ -209,10 +210,20 @@ static const struct soc_gpio_map gpssus_gpio_map[] = {
 	GPIO_END
 };
 
+static const u8 core_dedicated_irq[GPIO_MAX_DIRQS] = {
+	[TPAD_IRQ_OFFSET] = TPAD_IRQ_GPIO,
+	[TOUCH_IRQ_OFFSET] = TOUCH_IRQ_GPIO,
+};
+
+static const u8 sus_dedicated_irq[GPIO_MAX_DIRQS] = {
+};
+
 static struct soc_gpio_config gpio_config = {
 	.ncore = gpncore_gpio_map,
 	.score = gpscore_gpio_map,
-	.ssus  = gpssus_gpio_map
+	.ssus  = gpssus_gpio_map,
+	.core_dirq = &core_dedicated_irq,
+	.sus_dirq = &sus_dedicated_irq,
 };
 
 struct soc_gpio_config* mainboard_get_gpios(void)

src/mainboard/google/rambi/irqroute.h

@@ -45,3 +45,10 @@
 	PIRQ_PIC(F, DISABLE), \
 	PIRQ_PIC(G, DISABLE), \
 	PIRQ_PIC(H, DISABLE)
+
+/* CORE bank DIRQs - up to 16 supported */
+#define TPAD_IRQ_OFFSET		0
+#define TOUCH_IRQ_OFFSET	1
+/* Corresponding SCORE GPIO pins */
+#define TPAD_IRQ_GPIO		55
+#define TOUCH_IRQ_GPIO		72

src/mainboard/google/rambi/mainboard.c

@@ -33,7 +33,9 @@
 #include <arch/io.h>
 #include <arch/interrupt.h>
 #include <boot/coreboot_tables.h>
+#include <smbios.h>
 #include "ec.h"
+#include "onboard.h"
 
 void mainboard_suspend_resume(void)
 {
@@ -119,7 +121,7 @@ static int int15_handler(void)
 		}
 		break;
 
-        default:
+	default:
 		printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", X86_AX);
 		break;
 	}
@@ -132,12 +134,39 @@ static void mainboard_init(device_t dev)
 	mainboard_ec_init();
 }
 
+static int mainboard_smbios_data(device_t dev, int *handle,
+				 unsigned long *current)
+{
+	int len = 0;
+
+	len += smbios_write_type41(
+		current, handle,
+		BOARD_TRACKPAD_NAME,            /* name */
+		BOARD_TRACKPAD_IRQ,             /* instance */
+		BOARD_TRACKPAD_I2C_BUS,         /* segment */
+		BOARD_TRACKPAD_I2C_ADDR,        /* bus */
+		0,                              /* device */
+		0);                             /* function */
+
+	len += smbios_write_type41(
+		current, handle,
+		BOARD_TOUCHSCREEN_NAME,         /* name */
+		BOARD_TOUCHSCREEN_IRQ,          /* instance */
+		BOARD_TOUCHSCREEN_I2C_BUS,      /* segment */
+		BOARD_TOUCHSCREEN_I2C_ADDR,     /* bus */
+		0,                              /* device */
+		0);                             /* function */
+
+	return len;
+}
+
 // mainboard_enable is executed as first thing after
 // enumerate_buses().
 
 static void mainboard_enable(device_t dev)
 {
 	dev->ops->init = mainboard_init;
+	dev->ops->get_smbios_data = mainboard_smbios_data;
 #if CONFIG_VGA_ROM_RUN
 	/* Install custom int15 handler for VGA OPROM */
 	mainboard_interrupt_handlers(0x15, &int15_handler);

src/mainboard/google/rambi/onboard.h

@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef ONBOARD_H
+#define ONBOARD_H
+
+#include "irqroute.h"
+
+#define BOARD_TRACKPAD_NAME             "trackpad"
+#define BOARD_TRACKPAD_IRQ              GPIO_S0_DED_IRQ(TPAD_IRQ_OFFSET)
+#define BOARD_TRACKPAD_WAKE_GPIO        1       /* GPSSUS1 */
+#define BOARD_TRACKPAD_I2C_BUS          1       /* TODO(shawnn): Check this */
+#define BOARD_TRACKPAD_I2C_ADDR         0x67    /* TODO(shawnn): Check this */
+
+#define BOARD_TOUCHSCREEN_NAME          "touchscreen"
+#define BOARD_TOUCHSCREEN_IRQ           GPIO_S0_DED_IRQ(TOUCH_IRQ_OFFSET)
+#define BOARD_TOUCHSCREEN_WAKE_GPIO     2       /* GPSSUS2 */
+#define BOARD_TOUCHSCREEN_I2C_BUS       2       /* TODO(shawnn): Check this */
+#define BOARD_TOUCHSCREEN_I2C_ADDR      0x4a    /* TODO(shawnn): Check this */
+
+#endif