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068cd08506
Previously calls to hook_call_deferred were passed the function to call, which was then looked up in the .rodata.deferred section with a linear search. This linear search can be replaced with a subtract by passing the pointer to the deferred_data object created when DECLARE_DEFERRED was invoked. Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None CQ-DEPEND=CL:*255812 TEST=make buildall -j Change-Id: I951dd1541302875b102dd086154cf05591694440 Reviewed-on: https://chromium-review.googlesource.com/334315 Commit-Ready: Bill Richardson <wfrichar@chromium.org> Tested-by: Bill Richardson <wfrichar@chromium.org> Reviewed-by: Bill Richardson <wfrichar@chromium.org>
88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/* Copyright (c) 2014 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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#include "common.h"
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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "i2c.h"
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#include "keyboard_protocol.h"
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#include "timer.h"
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/* Console output macro */
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#define CPRINTF(format, args...) cprintf(CC_KEYBOARD, format, ## args)
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#define CPRINTS(format, args...) cprints(CC_KEYBOARD, format, ## args)
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#define CAPSENSE_I2C_ADDR 0x08
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#define CAPSENSE_MASK_BITS 8
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#define CAPSENSE_POLL_INTERVAL (20 * MSEC)
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static int capsense_read_bitmask(void)
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{
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int rv;
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uint8_t val = 0;
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i2c_lock(I2C_PORT_CAPSENSE, 1);
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rv = i2c_xfer(I2C_PORT_CAPSENSE, CAPSENSE_I2C_ADDR,
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0, 0, &val, 1, I2C_XFER_SINGLE);
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i2c_lock(I2C_PORT_CAPSENSE, 0);
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if (rv)
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CPRINTS("%s failed: error %d", __func__, rv);
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return val;
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}
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static void capsense_init(void)
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{
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gpio_enable_interrupt(GPIO_CAPSENSE_INT_L);
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}
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DECLARE_HOOK(HOOK_INIT, capsense_init, HOOK_PRIO_DEFAULT);
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/*
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* Keep checking polling the capsense until all the buttons are released.
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* We're not worrying about debouncing, since the capsense module should do
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* that for us.
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*/
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static void capsense_change_deferred(void)
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{
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static uint8_t cur_val;
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uint8_t new_val;
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int i, n, c;
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new_val = capsense_read_bitmask();
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if (new_val != cur_val) {
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CPRINTF("[%T capsense 0x%02x: ", new_val);
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for (i = 0; i < CAPSENSE_MASK_BITS; i++) {
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/* See what changed */
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n = (new_val >> i) & 0x01;
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c = (cur_val >> i) & 0x01;
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CPRINTF("%s", n ? " X " : " _ ");
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if (n == c)
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continue;
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#ifdef HAS_TASK_KEYPROTO
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/* Treat it as a keyboard event. */
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keyboard_update_button(i + KEYBOARD_BUTTON_CAPSENSE_1,
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n);
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#endif
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}
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CPRINTF("]\n");
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cur_val = new_val;
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}
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if (cur_val)
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hook_call_deferred(&capsense_change_deferred_data,
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CAPSENSE_POLL_INTERVAL);
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}
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DECLARE_DEFERRED(capsense_change_deferred);
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/*
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* Somebody's poking at us.
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*/
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void capsense_interrupt(enum gpio_signal signal)
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{
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hook_call_deferred(&capsense_change_deferred_data, 0);
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}
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