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433f98c6b6
PWM and temp sensor monitoring want to happen every second, vs. several times a second for watchdog and LPC. This is still considerably simpler than having tick functions declare an interval at which they want to be called, which would require a RAM-based array of pending tick functions and alarm times. If you need that level of complexity, you still need a task. BUG=chrome-os-partner:15714 BRANCH=none TEST=temporarily add HOOK_TICK and HOOK_SECOND hooks and see that on LM4, HOOK_TICK is called 4x a second and HOOK_SECOND is called every second. Change-Id: I5c09842fd356d3254021486949b2799142068b4f Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/36938 Commit-Ready: Simon Glass <sjg@chromium.org>
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* System hooks for Chrome EC */
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#ifndef __CROS_EC_HOOKS_H
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#define __CROS_EC_HOOKS_H
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#include "common.h"
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enum hook_priority {
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/* Generic values across all hooks */
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HOOK_PRIO_FIRST = 1, /* Highest priority */
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HOOK_PRIO_DEFAULT = 5000, /* Default priority */
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HOOK_PRIO_LAST = 9999, /* Lowest priority */
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/* Specific hook vales for HOOK_INIT */
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/* LPC inits before modules which need memory-mapped I/O */
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HOOK_PRIO_INIT_LPC = HOOK_PRIO_FIRST + 1,
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/* Chipset inits before modules which need to know its initial state. */
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HOOK_PRIO_INIT_CHIPSET = HOOK_PRIO_FIRST + 2,
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};
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enum hook_type {
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HOOK_INIT = 0, /* System init */
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HOOK_FREQ_CHANGE, /* System clock changed frequency */
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HOOK_SYSJUMP, /* About to jump to another image. Modules
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* which need to preserve data across such a
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* jump should save it here and restore it in
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* HOOK_INIT.
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*
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* NOTE: This hook is called with interrupts
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* disabled! */
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HOOK_CHIPSET_PRE_INIT, /* Initialization for components such as PMU to
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* be done before host chipset/AP starts up. */
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HOOK_CHIPSET_STARTUP, /* System is starting up. All suspend rails are
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* now on. */
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HOOK_CHIPSET_RESUME, /* System is resuming from suspend, or booting
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* and has reached the point where all voltage
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* rails are on */
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HOOK_CHIPSET_SUSPEND, /* System is suspending, or shutting down; all
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* voltage rails are still on */
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HOOK_CHIPSET_SHUTDOWN, /* System is shutting down. All suspend rails
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* are still on. */
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HOOK_AC_CHANGE, /* AC power plugged in or removed */
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HOOK_LID_CHANGE, /* Lid opened or closed. Based on debounced lid
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* state, not raw lid GPIO input. */
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HOOK_TICK, /* Periodic tick, every HOOK_TICK_INTERVAL */
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HOOK_SECOND, /* Periodic tick, every second */
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};
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struct hook_data {
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/* Hook processing routine. */
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void (*routine)(void);
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/* Priority; low numbers = higher priority. */
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int priority;
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};
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/**
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* Call all the hook routines of a specified type.
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*
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* @param type Type of hook routines to call.
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*/
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void hook_notify(enum hook_type type);
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/**
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* Register a hook routine.
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*
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* @param hooktype Type of hook for routine (enum hook_type)
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* @param routine Hook routine, with prototype void routine(void)
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* @param priority Priority for determining when routine is called vs.
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* other hook routines; should be between HOOK_PRIO_FIRST
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* and HOOK_PRIO_LAST, and should be HOOK_PRIO_DEFAULT
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* unless there's a compelling reason to care about the
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* order in which hooks are called.
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*/
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#define DECLARE_HOOK(hooktype, routine, priority) \
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const struct hook_data __hook_##hooktype##_##routine \
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__attribute__((section(".rodata." #hooktype))) \
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= {routine, priority}
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#endif /* __CROS_EC_HOOKS_H */
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