5a8da163c8
Dispense with "pmic" thread and process PMIC events directly within ISR. Add sense bit reading as part of the handling. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31528 a1c6a512-1295-4272-9138-f99709370657
164 lines
4 KiB
C
164 lines
4 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) 2006 by Linus Nielsen Feltzing
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 "system.h"
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#include "usb.h"
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#include "usb_core.h"
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#include "power.h"
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#include "power-gigabeat-s.h"
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#include "backlight.h"
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#include "backlight-target.h"
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#include "avic-imx31.h"
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#include "mc13783.h"
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#include "dvfs_dptc-imx31.h"
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#if CONFIG_TUNER
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#include "fmradio_i2c.h"
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#endif
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static unsigned long power_status = POWER_INPUT_NONE;
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/* Detect which power sources are present. */
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unsigned int power_input_status(void)
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{
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unsigned int status = power_status;
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if (GPIO3_DR & (1 << 20))
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status |= POWER_INPUT_BATTERY;
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if (usb_charging_maxcurrent() < 500)
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{
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/* ACK that USB is connected but NOT chargeable */
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status &= ~(POWER_INPUT_USB_CHARGER & POWER_INPUT_CHARGER);
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}
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return status;
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}
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void usb_charging_maxcurrent_change(int maxcurrent)
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{
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(void)maxcurrent;
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/* Nothing to do */
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}
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/* Helper to update the charger status */
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static void update_main_charger(bool present)
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{
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bitmod32(&power_status, present ? POWER_INPUT_MAIN_CHARGER : 0,
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POWER_INPUT_MAIN_CHARGER);
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}
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/* Detect changes in presence of the AC adaptor. Called from PMIC ISR. */
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void charger_main_detect_event(void)
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{
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update_main_charger(mc13783_event_sense(MC13783_INT_ID_SE1)
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& MC13783_SE1S);
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}
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/* Detect changes in USB bus power. Called from usb connect event ISR. */
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void charger_usb_detect_event(int status)
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{
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/* USB plugged does not imply charging is possible or even
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* powering the device to maintain the battery. */
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bitmod32(&power_status,
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status == USB_INSERTED ? POWER_INPUT_USB_CHARGER : 0,
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POWER_INPUT_USB_CHARGER);
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}
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/* charging_state is implemented in powermgmt-imx31.c */
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void ide_power_enable(bool on)
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{
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if (!on)
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{
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/* Bus must be isolated before power off */
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bitset32(&GPIO2_DR, (1 << 16));
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}
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/* HD power switch */
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bitmod32(&GPIO3_DR, on ? (1 << 5) : 0, (1 << 5));
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if (on)
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{
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/* Bus switch may be turned on after powerup */
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sleep(HZ/10);
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bitclr32(&GPIO2_DR, (1 << 16));
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}
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}
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bool ide_powered(void)
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{
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return (GPIO3_DR & (1 << 5)) != 0;
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}
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#if CONFIG_TUNER
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static bool tuner_on = false;
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bool tuner_power(bool status)
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{
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if (status != tuner_on)
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{
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tuner_on = status;
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/* Handle power and pin setup */
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fmradio_i2c_enable(status);
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status = !status;
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}
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return status;
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}
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bool tuner_powered(void)
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{
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return tuner_on;
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}
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#endif /* #if CONFIG_TUNER */
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void power_off(void)
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{
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/* Turn off voltage and frequency scaling */
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dvfs_stop();
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dptc_stop();
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/* Cut backlight */
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_backlight_off();
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/* Let it fade */
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sleep(5*HZ/4);
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/* Set user off mode */
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mc13783_set(MC13783_POWER_CONTROL0, MC13783_USEROFFSPI);
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/* Wait for power cut */
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system_halt();
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}
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void power_init(void)
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{
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#if CONFIG_TUNER
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fmradio_i2c_init();
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#endif
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/* Poll initial state */
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update_main_charger(mc13783_read(MC13783_INTERRUPT_SENSE0)
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& MC13783_SE1S);
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/* Enable detect event */
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mc13783_enable_event(MC13783_SE1_EVENT, true);
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}
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