rockbox/firmware/target/arm/imx31/gigabeat-s/usb-imx31.c
Daniel Stenberg 2acc0ac542 Updated our source code header to explicitly mention that we are GPL v2 or
later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
2008-06-28 18:10:04 +00:00

103 lines
2.8 KiB
C

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Linus Nielsen Feltzing
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "kernel.h"
#include "ata.h"
#include "usb.h"
#include "usb_core.h"
#include "usb_drv.h"
#include "clkctl-imx31.h"
#include "mc13783.h"
static int usb_status = USB_EXTRACTED;
static void enable_transceiver(bool enable)
{
if (enable)
{
if (GPIO1_DR & (1 << 30))
{
imx31_regmod32(&GPIO3_DR, 0, (1 << 16)); /* Reset ISP1504 */
sleep(HZ/100);
imx31_regmod32(&GPIO3_DR, (1 << 16), (1 << 16));
sleep(HZ/10);
imx31_regmod32(&GPIO1_DR, 0, (1 << 30)); /* Select ISP1504 */
}
}
else
{
imx31_regmod32(&GPIO1_DR, (1 << 30), (1 << 30)); /* Deselect ISP1504 */
}
}
void usb_connect_event(void)
{
uint32_t status = mc13783_read(MC13783_INTERRUPT_SENSE0);
usb_status = (status & MC13783_USB4V4S) ? USB_INSERTED : USB_EXTRACTED;
}
int usb_detect(void)
{
return usb_status;
}
/* Read the immediate state of the cable from the PMIC */
bool usb_plugged(void)
{
return mc13783_read(MC13783_INTERRUPT_SENSE0) & MC13783_USB4V4S;
}
void usb_init_device(void)
{
imx31_clkctl_module_clock_gating(CG_USBOTG, CGM_ON_ALL);
enable_transceiver(true);
/* Module will be turned off later after firmware init */
usb_drv_startup();
/* Initially poll */
usb_connect_event();
/* Enable PMIC event */
mc13783_enable_event(MC13783_USB4V4_EVENT);
}
void usb_enable(bool on)
{
if (on)
{
imx31_clkctl_module_clock_gating(CG_USBOTG, CGM_ON_ALL);
enable_transceiver(true);
usb_core_init();
}
else
{
/* Module clock should be on since this could be called first */
imx31_clkctl_module_clock_gating(CG_USBOTG, CGM_ON_ALL);
enable_transceiver(true);
usb_core_exit();
enable_transceiver(false);
imx31_clkctl_module_clock_gating(CG_USBOTG, CGM_OFF);
}
}