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4bde992ca3
On these older iPods, power was not being shut down completely, which led to a backfeed situation leading to decreased battery life and some stability issues. This was particuarly apparent when using SD card adapters that do not respect the ATA power management commands (ie all of them), as they never enter a low-power state on their own. With this change, there are reports of battery life exceeding 20 hours of continuous playback (~30% increase with CF cards, 3x improvement with SD cards) and appears to resolve intermittent wakeup stability issues with SD adapters. Change-Id: I46cfff7a59bb18a448989812303f30869df24d2d
253 lines
7.3 KiB
C
253 lines
7.3 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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* 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 "cpu.h"
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#include <stdbool.h>
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#include "kernel.h"
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#include "system.h"
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#include "power.h"
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#include "logf.h"
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#include "pcf50605.h"
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#include "usb.h"
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#include "lcd.h"
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#include "string.h"
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#ifdef HAVE_USB_CHARGING_ENABLE
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#include "usb_core.h" /* for usb_charging_maxcurrent_change */
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#endif
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void power_init(void)
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{
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#if defined(IPOD_1G2G) || defined(IPOD_3G)
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GPIOC_ENABLE |= 0x40; /* GPIO C6 is HDD power (low active) */
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GPIOC_OUTPUT_VAL &= ~0x40; /* on by default */
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GPIOC_OUTPUT_EN |= 0x40; /* enable output */
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#endif
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#ifndef IPOD_1G2G
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pcf50605_init();
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#endif
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}
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#if CONFIG_CHARGING
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unsigned int power_input_status(void)
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{
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unsigned int status = POWER_INPUT_NONE;
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#if defined(IPOD_NANO) || defined(IPOD_VIDEO)
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if ((GPIOL_INPUT_VAL & 0x08) == 0)
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status = POWER_INPUT_MAIN_CHARGER;
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if ((GPIOL_INPUT_VAL & 0x10) != 0)
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status |= POWER_INPUT_USB_CHARGER;
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/* */
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#elif defined(IPOD_4G) || defined(IPOD_COLOR) \
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|| defined(IPOD_MINI) || defined(IPOD_MINI2G)
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/* C2 is firewire power */
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if ((GPIOC_INPUT_VAL & 0x04) == 0)
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status = POWER_INPUT_MAIN_CHARGER;
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if ((GPIOD_INPUT_VAL & 0x08) != 0)
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status |= POWER_INPUT_USB_CHARGER;
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/* */
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#elif defined(IPOD_3G) || defined(IPOD_1G2G)
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/* firewire power */
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if ((GPIOC_INPUT_VAL & 0x10) == 0)
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status = POWER_INPUT_MAIN_CHARGER;
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/* */
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#else
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/* This needs filling in for other ipods. */
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#endif
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return status;
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}
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/* Returns true if the unit is charging the batteries. */
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bool charging_state(void) {
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#if defined(IPOD_COLOR)
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/* 0x70000088 appears to be the input value for GPO32 bits.
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Write a zero to 0x70000088 before reading.
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To enable input set the corresponding 0x7000008C bit,
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and clear the corresponding GPO32_ENABLE bit. */
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outl(0, 0x70000088);
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return (inl(0x70000088) & 1)?false:true;
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#else
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return (GPIOB_INPUT_VAL & 0x01)?false:true;
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#endif
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}
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#endif /* CONFIG_CHARGING */
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void ide_power_enable(bool on)
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{
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#if defined(IPOD_1G2G) || defined(IPOD_3G)
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if (on)
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GPIOC_OUTPUT_VAL &= ~0x40;
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else
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GPIOC_OUTPUT_VAL |= 0x40;
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#elif defined(IPOD_4G) || defined(IPOD_COLOR) \
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|| defined(IPOD_MINI) || defined(IPOD_MINI2G)
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if (on)
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{
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GPIO_CLEAR_BITWISE(GPIOJ_OUTPUT_VAL, 0x04);
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GPIO_CLEAR_BITWISE(GPIOI_ENABLE, 0xBF);
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GPIO_CLEAR_BITWISE(GPIOK_ENABLE, 0x1F);
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DEV_EN |= DEV_IDE0;
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}
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else
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{
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DEV_EN &= ~DEV_IDE0;
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GPIO_SET_BITWISE(GPIOJ_OUTPUT_VAL, 0x04);
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GPIO_SET_BITWISE(GPIOI_ENABLE, 0xBF);
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GPIO_SET_BITWISE(GPIOK_ENABLE, 0x1F);
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}
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#elif defined(IPOD_VIDEO)
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if (on)
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{
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GPO32_VAL &= ~0x40000000;
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sleep(1); /* only need 4 ms */
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DEV_EN |= DEV_IDE0;
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GPIOG_ENABLE = 0;
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GPIOH_ENABLE = 0;
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GPIO_CLEAR_BITWISE(GPIOI_ENABLE, 0xBF);
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GPIO_CLEAR_BITWISE(GPIOK_ENABLE, 0x1F);
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udelay(10);
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}
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else
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{
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DEV_EN &= ~DEV_IDE0;
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udelay(10);
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GPIOG_ENABLE = 0xFF;
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GPIOH_ENABLE = 0xFF;
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GPIO_SET_BITWISE(GPIOI_ENABLE, 0xBF);
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GPIO_SET_BITWISE(GPIOK_ENABLE, 0x1F);
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GPO32_VAL |= 0x40000000;
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}
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#else /* Nano */
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(void)on; /* Do nothing. */
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#endif
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}
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bool ide_powered(void)
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{
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#if defined(IPOD_1G2G) || defined(IPOD_3G)
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return !(GPIOC_OUTPUT_VAL & 0x40);
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#elif defined(IPOD_4G) || defined(IPOD_COLOR) \
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|| defined(IPOD_MINI) || defined(IPOD_MINI2G)
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return !(GPIOJ_OUTPUT_VAL & 0x04);
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#elif defined(IPOD_VIDEO)
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return !(GPO32_VAL & 0x40000000);
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#else /* Nano */
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return true; /* Pretend we are always powered */
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#endif
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}
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void power_off(void)
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{
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#if defined(HAVE_LCD_COLOR) && !defined(HAVE_LCD_SHUTDOWN)
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/* Clear the screen and backdrop to
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remove ghosting effect on shutdown */
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lcd_set_backdrop(NULL);
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lcd_set_background(LCD_WHITE);
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lcd_clear_display();
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lcd_update();
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sleep(HZ/16);
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#endif
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#ifndef BOOTLOADER
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#ifdef IPOD_1G2G
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/* we cannot turn off the 1st gen/ 2nd gen yet. Need to figure out sleep mode. */
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system_reboot();
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#else
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/* We don't turn off the ipod, we put it in a deep sleep */
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/* Clear latter part of iram (the part used by plugins/codecs) to ensure
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* that the OF behaves properly on boot. There is some kind of boot
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* failure flag there which otherwise may not be cleared.
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*/
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#if CONFIG_CPU == PP5022
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memset((void*)0x4000c000, 0, 0x14000);
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#elif CONFIG_CPU == PP5020
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memset((void*)0x4000c000, 0, 0xc000);
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#endif
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pcf50605_standby_mode();
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#endif
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#endif
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}
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#ifdef HAVE_USB_CHARGING_ENABLE
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void usb_charging_maxcurrent_change(int maxcurrent)
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{
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bool suspend_charging = (maxcurrent < 100);
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bool fast_charging = (maxcurrent >= 500);
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/* This GPIO is connected to the LTC4066's SUSP pin */
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/* Setting it high prevents any power being drawn over USB */
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/* which supports USB suspend */
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#if defined(IPOD_VIDEO) || defined(IPOD_NANO)
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if (suspend_charging)
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GPIO_SET_BITWISE(GPIOL_OUTPUT_VAL, 4);
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else
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GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 4);
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#elif defined(IPOD_MINI2G)
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if (suspend_charging)
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GPIO_SET_BITWISE(GPIOJ_OUTPUT_VAL, 2);
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else
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GPIO_CLEAR_BITWISE(GPIOJ_OUTPUT_VAL, 2);
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#else /* Color, 4G, Mini G1 */
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if (suspend_charging)
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GPO32_VAL |= 0x8000000;
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else
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GPO32_VAL &= ~0x8000000;
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#endif
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/* This GPIO is connected to the LTC4066's HPWR pin */
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/* Setting it low limits current to 100mA, setting it high allows 500mA */
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#if defined(IPOD_VIDEO) || defined(IPOD_NANO)
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if (fast_charging)
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GPIO_SET_BITWISE(GPIOA_OUTPUT_VAL, 4);
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else
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GPIO_CLEAR_BITWISE(GPIOA_OUTPUT_VAL, 4);
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#else
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if (fast_charging)
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GPO32_VAL |= 0x40;
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else
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GPO32_VAL &= ~0x40;
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#endif
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/* This GPIO is connected to the LTC4066's CLDIS pin */
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/* Setting it high allows up to 1.5A of current to be drawn */
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/* This doesn't appear to actually be safe even with an AC charger */
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/* so for now it is disabled. It's not known (or maybe doesn't exist) */
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/* on all models. */
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#if 0
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#if defined(IPOD_VIDEO)
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if (unlimited_charging)
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GPO32_VAL |= 0x10000000;
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else
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GPO32_VAL &= ~0x10000000;
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#elif defined(IPOD_4G) || defined(IPOD_COLOR)
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if (unlimited_charging)
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GPO32_VAL |= 0x200;
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else
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GPO32_VAL &= ~0x200;
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#endif
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/* This might be GPIOD & 40 on 2G */
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#endif
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}
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#endif /* HAVE_USB_CHARGING_ENABLE */
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