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https://github.com/Telecominfraproject/OpenCellular.git
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efb6bc7655
That way all the users of jump tags don't need to know about the
padding requirements.
BUG=chrome-os-partner:23851
BRANCH=none
TEST=enable CONFIG_CMD_JUMPTAGS, then 'jumptags'. Output should be
something like this:
20007fbc: 0x5550 UP.1 2
20007fc4: 0x4b42 KB.2 3
20007fcc: 0x4c50 LP.1 12
20007fdc: 0x4d54 MT.1 8
All the addresses in the first column should be word-aligned. The
sizes in the last column don't need to be a multiple of 4.
Change-Id: I91f9c29701a007ef8a56b5b7e0ea09930dfbea31
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/175591
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/* Copyright (c) 2013 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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/* PWM control module for Chromebook keyboard backlight. */
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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 "host_command.h"
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#include "lid_switch.h"
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#include "pwm.h"
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#include "system.h"
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#include "util.h"
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#define PWMKBD_SYSJUMP_TAG 0x504b /* "PK" */
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#define PWM_HOOK_VERSION 1
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/* Saved PWM state across sysjumps */
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struct pwm_kbd_state {
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uint8_t kblight_en;
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uint8_t kblight_percent;
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};
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/*****************************************************************************/
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/* Console commands */
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static int command_kblight(int argc, char **argv)
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{
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if (argc >= 2) {
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char *e;
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int i = strtoi(argv[1], &e, 0);
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if (*e)
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return EC_ERROR_PARAM1;
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pwm_set_duty(PWM_CH_KBLIGHT, i);
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}
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ccprintf("Keyboard backlight: %d%%\n", pwm_get_duty(PWM_CH_KBLIGHT));
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(kblight, command_kblight,
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"percent",
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"Set keyboard backlight",
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NULL);
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/*****************************************************************************/
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/* Host commands */
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int pwm_command_get_keyboard_backlight(struct host_cmd_handler_args *args)
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{
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struct ec_response_pwm_get_keyboard_backlight *r = args->response;
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r->percent = pwm_get_duty(PWM_CH_KBLIGHT);
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r->enabled = pwm_get_enabled(PWM_CH_KBLIGHT);
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args->response_size = sizeof(*r);
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_PWM_GET_KEYBOARD_BACKLIGHT,
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pwm_command_get_keyboard_backlight,
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EC_VER_MASK(0));
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int pwm_command_set_keyboard_backlight(struct host_cmd_handler_args *args)
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{
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const struct ec_params_pwm_set_keyboard_backlight *p = args->params;
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pwm_set_duty(PWM_CH_KBLIGHT, p->percent);
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_PWM_SET_KEYBOARD_BACKLIGHT,
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pwm_command_set_keyboard_backlight,
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EC_VER_MASK(0));
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/*****************************************************************************/
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/* Hooks */
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static void pwm_kblight_init(void)
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{
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const struct pwm_kbd_state *prev;
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int version, size;
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/* Configure GPIO */
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gpio_config_module(MODULE_PWM_KBLIGHT, 1);
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prev = (const struct pwm_kbd_state *)
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system_get_jump_tag(PWMKBD_SYSJUMP_TAG, &version, &size);
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if (prev && version == PWM_HOOK_VERSION && size == sizeof(*prev)) {
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/* Restore previous state. */
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pwm_enable(PWM_CH_KBLIGHT, prev->kblight_en);
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pwm_set_duty(PWM_CH_KBLIGHT, prev->kblight_percent);
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} else {
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/* Enable keyboard backlight control, turned down */
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pwm_set_duty(PWM_CH_KBLIGHT, 0);
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pwm_enable(PWM_CH_KBLIGHT, 1);
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}
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}
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DECLARE_HOOK(HOOK_INIT, pwm_kblight_init, HOOK_PRIO_DEFAULT);
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static void pwm_kblight_preserve_state(void)
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{
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struct pwm_kbd_state state;
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state.kblight_en = pwm_get_enabled(PWM_CH_KBLIGHT);
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state.kblight_percent = pwm_get_duty(PWM_CH_KBLIGHT);
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system_add_jump_tag(PWMKBD_SYSJUMP_TAG, PWM_HOOK_VERSION,
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sizeof(state), &state);
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}
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DECLARE_HOOK(HOOK_SYSJUMP, pwm_kblight_preserve_state, HOOK_PRIO_DEFAULT);
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static void pwm_kblight_suspend(void)
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{
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pwm_set_duty(PWM_CH_KBLIGHT, 0);
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}
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DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, pwm_kblight_suspend, HOOK_PRIO_DEFAULT);
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static void pwm_kblight_shutdown(void)
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{
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pwm_set_duty(PWM_CH_KBLIGHT, 0);
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}
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DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, pwm_kblight_shutdown, HOOK_PRIO_DEFAULT);
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static void pwm_kblight_lid_change(void)
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{
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pwm_enable(PWM_CH_KBLIGHT, lid_is_open());
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}
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DECLARE_HOOK(HOOK_LID_CHANGE, pwm_kblight_lid_change, HOOK_PRIO_DEFAULT);
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