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/***************************************************************************
* __________ __ ___.
* 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 "usb-target.h"
#include "clkctl-imx31.h"
#include "power-imx31.h"
#include "avic-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_regclr32(&GPIO3_DR, (1 << 16)); /* Reset ISP1504 */
sleep(HZ/100);
imx31_regset32(&GPIO3_DR, (1 << 16));
sleep(HZ/10);
imx31_regclr32(&GPIO1_DR, (1 << 30)); /* Select ISP1504 */
}
}
else
{
imx31_regset32(&GPIO1_DR, (1 << 30)); /* Deselect ISP1504 */
}
}
/* Read the immediate state of the cable from the PMIC */
bool usb_plugged(void)
{
return mc13783_read(MC13783_INTERRUPT_SENSE0) & MC13783_USB4V4S;
}
void usb_connect_event(void)
{
int status = usb_plugged() ? USB_INSERTED : USB_EXTRACTED;
usb_status = status;
/* Notify power that USB charging is potentially available */
charger_usb_detect_event(status);
usb_status_event((status == USB_INSERTED) ? USB_POWERED : USB_UNPOWERED);
}
int usb_detect(void)
{
return usb_status;
}
void usb_init_device(void)
{
/* Do one-time inits */
usb_drv_startup();
/* Initially poll */
usb_connect_event();
/* Enable PMIC event */
mc13783_enable_event(MC13783_USB_EVENT);
}
void usb_enable(bool on)
{
/* Module clock should be on since since this could be called with
* OFF initially and writing module registers would hardlock otherwise. */
imx31_clkctl_module_clock_gating(CG_USBOTG, CGM_ON_ALL);
enable_transceiver(true);
if (on)
{
usb_core_init();
}
else
{
usb_core_exit();
enable_transceiver(false);
imx31_clkctl_module_clock_gating(CG_USBOTG, CGM_OFF);
}
}
void usb_attach(void)
{
usb_drv_attach();
}
static void __attribute__((interrupt("IRQ"))) USB_OTG_HANDLER(void)
{
usb_drv_int(); /* Call driver handler */
}
void usb_drv_int_enable(bool enable)
{
if (enable)
avic_enable_int(USB_OTG, IRQ, 7, USB_OTG_HANDLER);
else
avic_disable_int(USB_OTG);
}
/* Called during the bus reset interrupt when in detect mode */
void usb_drv_usb_detect_event(void)
{
if (usb_drv_powered())
usb_status_event(USB_INSERTED);
}
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