e44372ef18
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7242 a1c6a512-1295-4272-9138-f99709370657
430 lines
11 KiB
C
430 lines
11 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Linus Nielsen Feltzing
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include <stdlib.h>
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#include "cpu.h"
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#include "kernel.h"
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#include "thread.h"
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#include "i2c.h"
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#include "debug.h"
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#include "rtc.h"
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#include "usb.h"
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#include "power.h"
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#include "system.h"
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#include "timer.h"
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#ifdef HAVE_REMOTE_LCD
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#include "lcd-remote.h"
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#endif
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#if defined(CONFIG_BACKLIGHT) && !defined(BOOTLOADER)
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const char backlight_timeout_value[19] =
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{
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-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 45, 60, 90
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};
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#define BACKLIGHT_ON 1
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#define BACKLIGHT_OFF 2
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#define REMOTE_BACKLIGHT_ON 3
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#define REMOTE_BACKLIGHT_OFF 4
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static void backlight_thread(void);
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static long backlight_stack[DEFAULT_STACK_SIZE/sizeof(long)];
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static const char backlight_thread_name[] = "backlight";
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static struct event_queue backlight_queue;
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static bool charger_was_inserted = 0;
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static bool backlight_on_when_charging = 0;
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static int backlight_timer;
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static unsigned int backlight_timeout = 5;
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#ifdef HAVE_REMOTE_LCD
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static int remote_backlight_timer;
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static unsigned int remote_backlight_timeout = 5;
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#endif
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#if CONFIG_BACKLIGHT == BL_IRIVER
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/* backlight fading */
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#define BL_PWM_INTERVAL 5000 /* Cycle interval in µs */
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#define BL_PWM_COUNT 100
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static const char backlight_fade_value[8] = { 0, 1, 2, 4, 6, 8, 10, 20 };
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static int fade_in_count = 1;
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static int fade_out_count = 4;
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static bool bl_timer_active = false;
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static int bl_dim_current = BL_PWM_COUNT;
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static int bl_dim_target = BL_PWM_COUNT;
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static int bl_pwm_counter = 0;
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static volatile int bl_cycle_counter = 0;
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static enum {DIM_STATE_START, DIM_STATE_MAIN} bl_dim_state = DIM_STATE_START;
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static void backlight_isr(void)
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{
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int timer_period;
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bool idle = false;
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timer_period = FREQ / 1000 * BL_PWM_INTERVAL / 1000;
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switch (bl_dim_state)
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{
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/* New cycle */
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case DIM_STATE_START:
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bl_pwm_counter = 0;
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bl_cycle_counter++;
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if (bl_dim_current > 0 && bl_dim_current < BL_PWM_COUNT)
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{
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and_l(~0x00020000, &GPIO1_OUT);
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bl_pwm_counter = bl_dim_current;
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timer_period = timer_period * bl_pwm_counter / BL_PWM_COUNT;
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bl_dim_state = DIM_STATE_MAIN;
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}
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else
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{
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if (bl_dim_current)
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and_l(~0x00020000, &GPIO1_OUT);
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else
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or_l(0x00020000, &GPIO1_OUT);
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if (bl_dim_current == bl_dim_target)
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idle = true;
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}
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break ;
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/* Dim main screen */
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case DIM_STATE_MAIN:
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or_l(0x00020000, &GPIO1_OUT);
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bl_dim_state = DIM_STATE_START;
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timer_period = timer_period * (BL_PWM_COUNT - bl_pwm_counter) / BL_PWM_COUNT;
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break ;
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}
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if ((bl_dim_target > bl_dim_current) && (bl_cycle_counter >= fade_in_count))
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{
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bl_dim_current++;
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bl_cycle_counter = 0;
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}
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if ((bl_dim_target < bl_dim_current) && (bl_cycle_counter >= fade_out_count))
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{
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bl_dim_current--;
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bl_cycle_counter = 0;
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}
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if (idle)
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{
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cpu_boost(false);
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timer_unregister();
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bl_timer_active = false;
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}
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else
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timer_set_period(timer_period);
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}
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static void backlight_switch(void)
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{
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if (bl_dim_target > (BL_PWM_COUNT/2))
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{
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and_l(~0x00020000, &GPIO1_OUT);
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bl_dim_current = BL_PWM_COUNT;
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}
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else
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{
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or_l(0x00020000, &GPIO1_OUT);
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bl_dim_current = 0;
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}
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}
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static void backlight_release_timer(void)
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{
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cpu_boost(false);
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timer_unregister();
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bl_timer_active = false;
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backlight_switch();
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}
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static void backlight_dim(int value)
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{
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bl_dim_target = value;
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if (bl_timer_active)
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return ;
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if (timer_register(0, backlight_release_timer, 1, 0, backlight_isr))
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{
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/* Prevent cpu frequency changes while dimming. */
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cpu_boost(true);
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bl_timer_active = true;
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}
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else
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backlight_switch();
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}
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void backlight_set_fade_in(int index)
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{
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fade_in_count = backlight_fade_value[index];
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}
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void backlight_set_fade_out(int index)
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{
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fade_out_count = backlight_fade_value[index];
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}
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#endif
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static void __backlight_off(void)
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{
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#if CONFIG_BACKLIGHT == BL_IRIVER
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if (fade_out_count > 0)
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backlight_dim(0);
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else
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{
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bl_dim_target = bl_dim_current = 0;
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or_l(0x00020000, &GPIO1_OUT);
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}
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#elif CONFIG_BACKLIGHT == BL_RTC
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/* Disable square wave */
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rtc_write(0x0a, rtc_read(0x0a) & ~0x40);
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#elif CONFIG_BACKLIGHT == BL_PA14_LO /* Player */
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and_b(~0x40, &PAIORH); /* let it float (up) */
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#elif CONFIG_BACKLIGHT == BL_PA14_HI /* Ondio */
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and_b(~0x40, &PADRH); /* drive it low */
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#elif CONFIG_BACKLIGHT == BL_GMINI
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P1 &= ~0x10;
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#endif
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}
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static void __backlight_on(void)
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{
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#if CONFIG_BACKLIGHT == BL_IRIVER
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if (fade_in_count > 0)
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backlight_dim(BL_PWM_COUNT);
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else
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{
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bl_dim_target = bl_dim_current = BL_PWM_COUNT;
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and_l(~0x00020000, &GPIO1_OUT);
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}
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#elif CONFIG_BACKLIGHT == BL_RTC
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/* Enable square wave */
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rtc_write(0x0a, rtc_read(0x0a) | 0x40);
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#elif CONFIG_BACKLIGHT == BL_PA14_LO /* Player */
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and_b(~0x40, &PADRH); /* drive and set low */
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or_b(0x40, &PAIORH);
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#elif CONFIG_BACKLIGHT == BL_PA14_HI /* Ondio */
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or_b(0x40, &PADRH); /* drive it high */
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#elif CONFIG_BACKLIGHT == BL_GMINI
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P1 |= 0x10;
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#endif
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}
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void backlight_thread(void)
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{
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struct event ev;
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while(1)
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{
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queue_wait(&backlight_queue, &ev);
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switch(ev.id)
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{
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#ifdef HAVE_REMOTE_LCD
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case REMOTE_BACKLIGHT_ON:
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remote_backlight_timer =
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HZ*backlight_timeout_value[remote_backlight_timeout];
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/* Backlight == OFF in the setting? */
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if(remote_backlight_timer < 0)
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{
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remote_backlight_timer = 0; /* Disable the timeout */
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lcd_remote_backlight_off();
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}
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else
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{
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lcd_remote_backlight_on();
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}
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break;
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case REMOTE_BACKLIGHT_OFF:
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lcd_remote_backlight_off();
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break;
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#endif
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case BACKLIGHT_ON:
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if( backlight_on_when_charging && charger_inserted() )
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{
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/* Forcing to zero keeps the lights on */
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backlight_timer = 0;
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}
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else
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{
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backlight_timer = HZ*backlight_timeout_value[backlight_timeout];
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}
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if(backlight_timer < 0) /* Backlight == OFF in the setting? */
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{
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backlight_timer = 0; /* Disable the timeout */
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__backlight_off();
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}
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else
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{
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__backlight_on();
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}
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break;
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case BACKLIGHT_OFF:
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__backlight_off();
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break;
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case SYS_USB_CONNECTED:
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/* Tell the USB thread that we are safe */
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DEBUGF("backlight_thread got SYS_USB_CONNECTED\n");
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usb_acknowledge(SYS_USB_CONNECTED_ACK);
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break;
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case SYS_USB_DISCONNECTED:
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usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
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break;
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}
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}
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}
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void backlight_on(void)
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{
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queue_post(&backlight_queue, BACKLIGHT_ON, NULL);
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}
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void backlight_off(void)
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{
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queue_post(&backlight_queue, BACKLIGHT_OFF, NULL);
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}
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#ifdef HAVE_REMOTE_LCD
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void remote_backlight_on(void)
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{
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queue_post(&backlight_queue, REMOTE_BACKLIGHT_ON, NULL);
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}
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void remote_backlight_off(void)
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{
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queue_post(&backlight_queue, REMOTE_BACKLIGHT_OFF, NULL);
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}
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void remote_backlight_set_timeout(int index)
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{
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if((unsigned)index >= sizeof(backlight_timeout_value))
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/* if given a weird value, use 0 */
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index=0;
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remote_backlight_timeout = index; /* index in the backlight_timeout_value table */
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remote_backlight_on();
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}
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#endif
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int backlight_get_timeout(void)
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{
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return backlight_timeout;
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}
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void backlight_set_timeout(int index)
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{
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if((unsigned)index >= sizeof(backlight_timeout_value))
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/* if given a weird value, use 0 */
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index=0;
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backlight_timeout = index; /* index in the backlight_timeout_value table */
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backlight_on();
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}
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#ifdef HAVE_CHARGE_CTRL
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bool backlight_get_on_when_charging(void)
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{
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return backlight_on_when_charging;
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}
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#endif
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void backlight_set_on_when_charging(bool yesno)
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{
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backlight_on_when_charging = yesno;
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backlight_on();
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}
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void backlight_tick(void)
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{
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bool charger_is_inserted = charger_inserted();
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if( backlight_on_when_charging &&
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(charger_was_inserted != charger_is_inserted) )
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{
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backlight_on();
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}
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charger_was_inserted = charger_is_inserted;
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if(backlight_timer)
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{
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backlight_timer--;
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if(backlight_timer == 0)
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{
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backlight_off();
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}
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}
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#ifdef HAVE_REMOTE_LCD
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if(remote_backlight_timer)
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{
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remote_backlight_timer--;
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if(remote_backlight_timer == 0)
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{
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remote_backlight_off();
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}
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}
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#endif
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}
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void backlight_init(void)
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{
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queue_init(&backlight_queue);
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create_thread(backlight_thread, backlight_stack,
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sizeof(backlight_stack), backlight_thread_name);
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#if CONFIG_BACKLIGHT == BL_IRIVER
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or_l(0x00020000, &GPIO1_ENABLE);
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or_l(0x00020000, &GPIO1_FUNCTION);
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#elif CONFIG_BACKLIGHT == BL_PA14_LO || CONFIG_BACKLIGHT == BL_PA14_HI
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PACR1 &= ~0x3000; /* Set PA14 (backlight control) to GPIO */
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or_b(0x40, &PAIORH); /* ..and output */
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#elif CONFIG_BACKLIGHT == BL_GMINI
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P1CON |= 0x10; /* P1.4 C-MOS output mode */
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#endif
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backlight_on();
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#ifdef HAVE_REMOTE_LCD
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remote_backlight_on();
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#endif
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}
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#else /* no backlight, empty dummy functions */
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void backlight_init(void) {}
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void backlight_on(void) {}
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void backlight_off(void) {}
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void backlight_tick(void) {}
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int backlight_get_timeout(void) {return 0;}
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void backlight_set_timeout(int index) {(void)index;}
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void backlight_set_on_when_charging(bool yesno) {(void)yesno;}
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#ifdef HAVE_REMOTE_LCD
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void remote_backlight_on(void) {}
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void remote_backlight_off(void) {}
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void remote_backlight_set_timeout(int index) {(void)index;}
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#endif
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#endif /* #ifdef CONFIG_BACKLIGHT */
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