1 files changed, 98 insertions, 0 deletions
diff --git a/include/power.h b/include/power.h
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+++ b/include/power.h
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+/* Copyright (c) 2013 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.
+ */
+
+/* Common interface for x86 chipsets */
+
+#ifndef __CROS_EC_CHIPSET_X86_COMMON_H
+#define __CROS_EC_CHIPSET_X86_COMMON_H
+
+#include "common.h"
+#include "gpio.h"
+
+enum x86_state {
+	/* Steady states */
+	X86_G3 = 0,	/*
+			 * System is off (not technically all the way into G3,
+			 * which means totally unpowered...)
+			 */
+	X86_S5,		/* System is soft-off */
+	X86_S3,		/* Suspend; RAM on, processor is asleep */
+	X86_S0,		/* System is on */
+
+	/* Transitions */
+	X86_G3S5,	/* G3 -> S5 (at system init time) */
+	X86_S5S3,	/* S5 -> S3 */
+	X86_S3S0,	/* S3 -> S0 */
+	X86_S0S3,	/* S0 -> S3 */
+	X86_S3S5,	/* S3 -> S5 */
+	X86_S5G3,	/* S5 -> G3 */
+};
+
+/* Information on an x86 signal */
+struct x86_signal_info {
+	enum gpio_signal gpio;	/* GPIO for signal */
+	int level;		/* GPIO level which sets signal bit */
+	const char *name;	/* Name of signal */
+};
+
+/*
+ * Each board must provide its signal list and a corresponding enum x86_signal.
+ */
+extern const struct x86_signal_info x86_signal_list[];
+
+/* Convert enum x86_signal to a mask for signal functions */
+#define X86_SIGNAL_MASK(signal) (1 << (signal))
+
+/**
+ * Return current input signal state (one or more X86_SIGNAL_MASK()s).
+ */
+uint32_t x86_get_signals(void);
+
+/**
+ * Check for required inputs
+ *
+ * @param want		Mask of signals which must be present (one or more
+ *			X86_SIGNAL_MASK()s).
+ *
+ * @return Non-zero if all present; zero if a required signal is missing.
+ */
+int x86_has_signals(uint32_t want);
+
+/**
+ * Wait for x86 input signals to be present
+ *
+ * @param want		Mask of signals which must be present (one or more
+ *			X86_SIGNAL_MASK()s).  If want=0, stops waiting for
+ *			signals.
+ * @return EC_SUCCESS when all inputs are present, or ERROR_TIMEOUT if timeout
+ * before reaching the desired state.
+ */
+int x86_wait_signals(uint32_t want);
+
+/**
+ * Chipset-specific initialization
+ *
+ * @return The state the chipset should start in.  Usually X86_G3, but may
+ * be X86_G0 if the chipset was already on and we've jumped to this image.
+ */
+enum x86_state x86_chipset_init(void);
+
+/**
+ * Chipset-specific state handler
+ *
+ * @return The updated state for the x86 chipset.
+ */
+enum x86_state x86_handle_state(enum x86_state state);
+
+/**
+ * Interrupt handler for x86 chipset GPIOs.
+ */
+#ifdef CONFIG_CHIPSET_X86
+void x86_interrupt(enum gpio_signal signal);
+#else
+#define x86_interrupt NULL
+#endif
+
+#endif  /* __CROS_EC_CHIPSET_X86_COMMON_H */