/************************************************************************************
* configs/ea3131/src/up_usbhost.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <sched.h>
#include <errno.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/usb/usbdev.h>
#include <nuttx/usb/usbhost.h>
#include <nuttx/usb/usbdev_trace.h>
#include "up_arch.h"
#include "lpc31_internal.h"
#include "ea3131_internal.h"
#if defined(CONFIG_LPC31_USBOTG) || defined(CONFIG_USBHOST)
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
#ifndef CONFIG_USBHOST_DEFPRIO
# define CONFIG_USBHOST_DEFPRIO 50
#endif
#ifndef CONFIG_USBHOST_STACKSIZE
# define CONFIG_USBHOST_STACKSIZE 1024
#endif
#ifdef HAVE_USBDEV
# undef CONFIG_LPC31_USBOTG_RHPORT1
#endif
/************************************************************************************
* Private Data
************************************************************************************/
/* Retained device driver handle */
static struct usbhost_connection_s *g_ehciconn;
/* Overcurrent interrupt handler */
#if 0 /* Not yet implemented */
static xcpt_t g_ochandler;
#endif
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Name: ehci_waiter
*
* Description:
* Wait for USB devices to be connected to the EHCI root hub.
*
************************************************************************************/
static int ehci_waiter(int argc, char *argv[])
{
bool connected = false;
int rhpndx;
int ret;
uvdbg("Waiter Running\n");
for (;;)
{
/* Wait for the device to change state */
rhpndx = CONN_WAIT(g_ehciconn, &connected);
DEBUGASSERT(rhpndx >= 0 && rhpndx < 1);
connected = !connected;
uvdbg("RHport1 %s\n",
connected ? "connected" : "disconnected");
/* Did we just become connected? */
if (connected)
{
/* Yes.. enumerate the newly connected device */
ret = CONN_ENUMERATE(g_ehciconn, rhpndx);
if (ret < 0)
{
uvdbg("RHport1 CONN_ENUMERATE failed: %d\n", ret);
connected = false;
}
}
}
/* Keep the compiler from complaining */
return 0;
}
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: lpc31_usbhost_bootinitialize
*
* Description:
* Called from lpc31_boardinitialize very early in inialization to setup USB
* host-related GPIO pins for the EA3131 board.
*
* USB host VBUS power is controlled by a Micrel USB power switch. That switch is
* driver by a discrete that comes from the I2C-contrrol PCA9532 GPIO expander.
*
************************************************************************************/
void weak_function lpc31_usbhost_bootinitialize(void)
{
/* Get an instance of the I2C interface. This will be needed to control the
* PCA9532 GPIO expander.
*/
#warning Missing logic
/* Use the I2C interface to initialize the PCA9532 GPIO expander driver */
#warning Missing logic
/* Configure pin to drive VBUS power using the PCA8532 GPIO expander */
#warning Missing logic
/* Configure pin to detect overrcurrent errors */
#warning Missing logic
}
/***********************************************************************************
* Name: lpc31_usbhost_initialize
*
* Description:
* Called at application startup time to initialize the USB host functionality.
* This function will start a thread that will monitor for device
* connection/disconnection events.
*
***********************************************************************************/
int lpc31_usbhost_initialize(void)
{
pid_t pid;
int ret;
/* First, register all of the class drivers needed to support the drivers
* that we care about
*
* Register theUSB host Mass Storage Class:
*/
#ifdef CONFIG_USBHOST_MSC
ret = usbhost_storageinit();
if (ret != OK)
{
udbg("ERROR: Failed to register the mass storage class: %d\n", ret);
}
#endif
/* Register the USB host HID keyboard class driver */
#ifdef CONFIG_USBHOST_HIDKBD
ret = usbhost_kbdinit();
if (ret != OK)
{
udbg("ERROR: Failed to register the KBD class\n");
}
#endif
/* Then get an instance of the USB EHCI interface. */
g_ehciconn = lpc31_ehci_initialize(0);
if (!g_ehciconn)
{
udbg("ERROR: lpc31_ehci_initialize failed\n");
return -ENODEV;
}
/* Start a thread to handle device connection. */
pid = TASK_CREATE("EHCI Monitor", CONFIG_USBHOST_DEFPRIO, CONFIG_USBHOST_STACKSIZE,
(main_t)ehci_waiter, (FAR char * const *)NULL);
if (pid < 0)
{
udbg("ERROR: Failed to create ehci_waiter task: %d\n", ret);
return -ENODEV;
}
return OK;
}
/***********************************************************************************
* Name: lpc31_usbhost_vbusdrive
*
* Description:
* Enable/disable driving of VBUS 5V output. This function must be provided by
* each platform that implements the OHCI or EHCI host interface
*
* Input Parameters:
* rhport - Selects root hub port to be powered host interface. See SAM_RHPORT_*
* definitions above.
* enable - true: enable VBUS power; false: disable VBUS power
*
* Returned Value:
* None
*
***********************************************************************************/
void lpc31_usbhost_vbusdrive(int rhport, bool enable)
{
uvdbg("RHPort%d: enable=%d\n", rhport+1, enable);
/* The LPC3131 has only a single root hub port */
if (rhport == 0)
{
/* Then enable or disable VBUS power */
if (enable)
{
/* Enable the Power Switch by driving the enable pin low */
#warning Missing logic
}
else
{
/* Disable the Power Switch by driving the enable pin high */
#warning Missing logic
}
}
}
/************************************************************************************
* Name: lpc31_setup_overcurrent
*
* Description:
* Setup to receive an interrupt-level callback if an overcurrent condition is
* detected.
*
* Input parameter:
* handler - New overcurrent interrupt handler
*
* Returned value:
* Old overcurrent interrupt handler
*
************************************************************************************/
#if 0 /* Not ready yet */
xcpt_t lpc31_setup_overcurrent(xcpt_t handler)
{
xcpt_t oldhandler;
irqstate_t flags;
/* Disable interrupts until we are done. This guarantees that the
* following operations are atomic.
*/
flags = irqsave();
/* Get the old button interrupt handler and save the new one */
oldhandler = g_ochandler;
g_ochandler = handler;
/* Configure the interrupt */
#warning Missing logic
/* Return the old button handler (so that it can be restored) */
irqrestore(flags);
return oldhandler;
}
#endif /* 0 */
#endif /* CONFIG_LPC31_USBOTG || CONFIG_USBHOST */
