020f16a1c7
Before, the Cypress chip power is always turn on either from internal battery or from usb host. In this regard, the internal battery energy was spend on the inactive chip. Now power of the Cypress chip is enabled only on the external usb host. Change-Id: Iae7cddd1237ea9ed93fee5404575cc01543cb00c Reviewed-on: http://gerrit.rockbox.org/433 Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>
58 lines
2 KiB
C
58 lines
2 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 <stdbool.h>
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#include "cpu.h"
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#include "system.h"
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#include "kernel.h"
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#include "usb.h"
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void usb_init_device(void)
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{
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or_l(0x00000080, &GPIO1_FUNCTION); /* GPIO39 is the USB detect input */
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/* Turn off all Cypress chip power suppies */
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and_l(~0x01000000, &GPIO_OUT); /* GPIO24 (USB_EN) - low (controled power from usb host) */
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or_l(0x40, &GPIO_OUT); /* GPOI6 (USB_POW_ON) - high (controled power from internal battery) */
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or_l(0x01000040, &GPIO_ENABLE);
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or_l(0x01000040, &GPIO_FUNCTION);
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}
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int usb_detect(void)
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{
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return (GPIO1_READ & 0x80) ? USB_INSERTED : USB_EXTRACTED;
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}
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void usb_enable(bool on)
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{
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if(on)
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{
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/* Power on the Cypress chip */
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or_l(0x01000000, &GPIO_OUT); /* Turn on only GPIO24 (USB_EN). GPOI6 (USB_POW_ON) still at high state (off) */
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sleep(2);
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}
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else
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{
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/* Power off the Cypress chip */
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and_l(~0x01000000, &GPIO_OUT); /* Turn off only GPIO24 (USB_EN). GPOI6 (USB_POW_ON) still at high state (off) */
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}
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}
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