chromeos mainboards: remove chromeos.asl

Use the ACPI generator for creating the Chrome OS gpio
package. Each mainboard has its own list of Chrome OS
gpios that are fed into a helper to generate the ACPI
external OIPG package.  Additionally, the common
chromeos.asl is now conditionally included based on
CONFIG_CHROMEOS.

Change-Id: I1d3d951964374a9d43521879d4c265fa513920d2
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15909
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/vendorcode/google/chromeos/Makefile.inc

@@ -20,6 +20,7 @@ ramstage-y += chromeos.c
 
 ramstage-$(CONFIG_ELOG) += elog.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += gnvs.c
+ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c
 ramstage-$(CONFIG_CHROMEOS_RAMOOPS) += ramoops.c
 romstage-y += vpd_decode.c
 ramstage-y += vpd_decode.c cros_vpd.c vpd_mac.c vpd_serialno.c vpd_calibration.c

src/vendorcode/google/chromeos/acpi.c

@@ -0,0 +1,43 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 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.
+ */
+
+#include <arch/acpigen.h>
+#include "chromeos.h"
+
+void chromeos_acpi_gpio_generate(const struct cros_gpio *gpios, size_t num)
+{
+	size_t i;
+
+	acpigen_write_scope("\\");
+	acpigen_write_name("OIPG");
+
+	acpigen_write_package(num);
+	for (i = 0; i < num; i++) {
+		acpigen_write_package(4);
+		acpigen_write_integer(gpios[i].type);
+		acpigen_write_integer(gpios[i].polarity);
+		acpigen_write_integer(gpios[i].gpio_num);
+		acpigen_write_string(gpios[i].device);
+		acpigen_pop_len();
+	}
+	acpigen_pop_len();
+
+	acpigen_pop_len();
+}
+
+void chromeos_dsdt_generator(struct device *dev)
+{
+	mainboard_chromeos_acpi_generate();
+}

src/vendorcode/google/chromeos/acpi/chromeos.asl

@@ -15,6 +15,11 @@
 
 #include <vboot/vbnv_layout.h>
 
+#if IS_ENABLED(CONFIG_CHROMEOS)
+
+/* GPIO package generated at run time. */
+External (OIPG)
+
 Device (CRHW)
 {
 	Name(_HID, EISAID("GGL0001"))
@@ -107,3 +112,4 @@ Device (CRHW)
 }
 
 #include "ramoops.asl"
+#endif

src/vendorcode/google/chromeos/chromeos.h

@@ -19,6 +19,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <bootmode.h>
+#include <device/device.h>
 #include <rules.h>
 #include <vboot/misc.h>
 #include <vboot/vboot_common.h>
@@ -53,4 +54,75 @@ static inline void chromeos_reserve_ram_oops(struct device *dev, int idx) {}
 
 void cbmem_add_vpd_calibration_data(void);
 
+/*
+ * Create the OIPG package containing the Chrome OS gpios described by
+ * the chromeos_gpio array.
+ */
+struct cros_gpio;
+void chromeos_acpi_gpio_generate(const struct cros_gpio *gpios, size_t num);
+
+/*
+ * Common helper function and delcarations for mainboards to use to generate
+ * ACPI-specific Chrome OS needs.
+ */
+void mainboard_chromeos_acpi_generate(void);
+#if IS_ENABLED(CONFIG_CHROMEOS)
+void chromeos_dsdt_generator(struct device *dev);
+#else
+#define chromeos_dsdt_generator DEVICE_NOOP
+#endif
+
+enum {
+	CROS_GPIO_REC = 1, /* Recovery */
+	CROS_GPIO_DEV = 2, /* Developer */
+	CROS_GPIO_WP = 3, /* Write Protect */
+
+	CROS_GPIO_ACTIVE_LOW = 0,
+	CROS_GPIO_ACTIVE_HIGH = 1,
+
+	CROS_GPIO_VIRTUAL = -1,
+};
+
+struct cros_gpio {
+	int type;
+	int polarity;
+	int gpio_num;
+	const char *device;
+};
+
+#define CROS_GPIO_INITIALIZER(typ, pol, num, dev) \
+	{				\
+		.type = (typ),		\
+		.polarity = (pol),	\
+		.gpio_num = (num),	\
+		.device = (dev),	\
+	}
+
+#define CROS_GPIO_REC_INITIALIZER(pol, num, dev) \
+	CROS_GPIO_INITIALIZER(CROS_GPIO_REC, pol, num, dev)
+
+#define CROS_GPIO_REC_AL(num, dev) \
+	CROS_GPIO_REC_INITIALIZER(CROS_GPIO_ACTIVE_LOW, num, dev)
+
+#define CROS_GPIO_REC_AH(num, dev) \
+	CROS_GPIO_REC_INITIALIZER(CROS_GPIO_ACTIVE_HIGH, num, dev)
+
+#define CROS_GPIO_DEV_INITIALIZER(pol, num, dev) \
+	CROS_GPIO_INITIALIZER(CROS_GPIO_DEV, pol, num, dev)
+
+#define CROS_GPIO_DEV_AL(num, dev) \
+	CROS_GPIO_DEV_INITIALIZER(CROS_GPIO_ACTIVE_LOW, num, dev)
+
+#define CROS_GPIO_DEV_AH(num, dev) \
+	CROS_GPIO_DEV_INITIALIZER(CROS_GPIO_ACTIVE_HIGH, num, dev)
+
+#define CROS_GPIO_WP_INITIALIZER(pol, num, dev) \
+	CROS_GPIO_INITIALIZER(CROS_GPIO_WP, pol, num, dev)
+
+#define CROS_GPIO_WP_AL(num, dev) \
+	CROS_GPIO_WP_INITIALIZER(CROS_GPIO_ACTIVE_LOW, num, dev)
+
+#define CROS_GPIO_WP_AH(num, dev) \
+	CROS_GPIO_WP_INITIALIZER(CROS_GPIO_ACTIVE_HIGH, num, dev)
+
 #endif /* __CHROMEOS_H__ */