/************************************************************************************ * configs/olimex-lpc-h3131/src/lpc31_usbhost.c * * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #include #include #include #include "up_arch.h" #include "lpc31_internal.h" #include "lpc_h3131.h" #ifdef HAVE_USBHOST /************************************************************************************ * Pre-processor Definitions ************************************************************************************/ #ifndef CONFIG_USBHOST_DEFPRIO # define CONFIG_USBHOST_DEFPRIO 50 #endif #ifndef CONFIG_USBHOST_STACKSIZE # define CONFIG_USBHOST_STACKSIZE 1024 #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 LPC-H3131 board. * * SIGNAL GPIO * ----------- ------- * #OTG_PWR_E GPIO19 * #OTG_OVRCR GPIO20 * ************************************************************************************/ void weak_function lpc31_usbhost_bootinitialize(void) { /* Configure output pin to drive VBUS power (initial state: power off) */ gpio_outputhigh(LPC31_IOCONFIG_GPIO, GPIO_NOTG_PWR_E); /* Configure input pin to detect overrcurrent errors */ gpio_configinput(LPC31_IOCONFIG_GPIO, GPIO_NOTG_OVRCR); /* Configure to receive interrupts on the overrcurrent input pin */ #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. Since the LPC31 * has only a downstream port, zero is the only possible value for this * parameter. * 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 */ gpio_outputlow(LPC31_IOCONFIG_GPIO, GPIO_NOTG_PWR_E); } else { /* Disable the Power Switch by driving the enable pin high */ gpio_outputhigh(LPC31_IOCONFIG_GPIO, GPIO_NOTG_PWR_E); } } } /************************************************************************************ * 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 /* HAVE_USBHOST */