343 lines
10 KiB
C
343 lines
10 KiB
C
/************************************************************************************
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* configs/stm32f4discovery/src/stm32_usb.c
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*
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* Copyright (C) 2016-2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <sched.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/kthread.h>
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#include <nuttx/usb/usbdev.h>
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#include <nuttx/usb/usbhost.h>
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#include <nuttx/usb/usbdev_trace.h>
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#include "up_arch.h"
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#include "stm32_otg.h"
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#include "stm32_gpio.h"
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#include "stm32f746-ws.h"
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#ifdef CONFIG_STM32F7_OTGFS
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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#if defined(CONFIG_USBDEV) || defined(CONFIG_USBHOST)
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# define HAVE_USB 1
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#else
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# warning "CONFIG_STM32F7_OTGFS is enabled but neither CONFIG_USBDEV nor CONFIG_USBHOST"
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# undef HAVE_USB
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#endif
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#ifndef CONFIG_STM32F7F4DISCO_USBHOST_PRIO
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# define CONFIG_STM32F7F4DISCO_USBHOST_PRIO 100
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#endif
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#ifndef CONFIG_STM32F7F4DISCO_USBHOST_STACKSIZE
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# define CONFIG_STM32F7F4DISCO_USBHOST_STACKSIZE 1024
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#endif
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/************************************************************************************
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* Private Data
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************************************************************************************/
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#ifdef CONFIG_USBHOST
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static struct usbhost_connection_s *g_usbconn;
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#endif
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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/************************************************************************************
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* Name: usbhost_waiter
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*
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* Description:
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* Wait for USB devices to be connected.
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*
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************************************************************************************/
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#ifdef CONFIG_USBHOST
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static int usbhost_waiter(int argc, char *argv[])
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{
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struct usbhost_hubport_s *hport;
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uinfo("Running\n");
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for (;;)
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{
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/* Wait for the device to change state */
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DEBUGVERIFY(CONN_WAIT(g_usbconn, &hport));
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uinfo("%s\n", hport->connected ? "connected" : "disconnected");
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/* Did we just become connected? */
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if (hport->connected)
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{
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/* Yes.. enumerate the newly connected device */
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(void)CONN_ENUMERATE(g_usbconn, hport);
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}
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}
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/* Keep the compiler from complaining */
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return 0;
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}
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#endif
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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* Name: stm32_usbinitialize
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*
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* Description:
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* Called from stm32_usbinitialize very early in inialization to setup USB-related
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* GPIO pins for the STM32F4Discovery board.
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*
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************************************************************************************/
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void stm32_usbinitialize(void)
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{
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/* The OTG FS has an internal soft pull-up. No GPIO configuration is required */
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/* Configure the OTG FS VBUS sensing GPIO, Power On, and Overcurrent GPIOs */
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#ifdef CONFIG_STM32F7_OTGFS
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stm32_configgpio(GPIO_OTGFS_VBUS);
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#ifdef CONFIG_USBHOST
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stm32_configgpio(GPIO_OTGFS_PWRON);
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stm32_configgpio(GPIO_OTGFS_OVER);
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#endif
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#endif
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}
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/***********************************************************************************
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* Name: stm32_usbhost_initialize
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*
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* Description:
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* Called at application startup time to initialize the USB host functionality.
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* This function will start a thread that will monitor for device
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* connection/disconnection events.
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*
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***********************************************************************************/
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#ifdef CONFIG_USBHOST
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int stm32_usbhost_initialize(void)
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{
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int pid;
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#if defined(CONFIG_USBHOST_HUB) || defined(CONFIG_USBHOST_MSC) || \
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defined(CONFIG_USBHOST_HIDKBD) || defined(CONFIG_USBHOST_HIDMOUSE)
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int ret;
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#endif
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/* First, register all of the class drivers needed to support the drivers
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* that we care about:
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*/
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uinfo("Register class drivers\n");
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#ifdef CONFIG_USBHOST_HUB
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/* Initialize USB hub class support */
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ret = usbhost_hub_initialize();
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if (ret < 0)
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{
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uerr("ERROR: usbhost_hub_initialize failed: %d\n", ret);
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}
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#endif
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#ifdef CONFIG_USBHOST_MSC
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/* Register the USB mass storage class class */
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ret = usbhost_msc_initialize();
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if (ret != OK)
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{
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uerr("ERROR: Failed to register the mass storage class: %d\n", ret);
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}
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#endif
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#ifdef CONFIG_USBHOST_CDCACM
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/* Register the CDC/ACM serial class */
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ret = usbhost_cdcacm_initialize();
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if (ret != OK)
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{
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uerr("ERROR: Failed to register the CDC/ACM serial class: %d\n", ret);
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}
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#endif
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#ifdef CONFIG_USBHOST_HIDKBD
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/* Initialize the HID keyboard class */
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ret = usbhost_kbdinit();
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if (ret != OK)
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{
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uerr("ERROR: Failed to register the HID keyboard class\n");
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}
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#endif
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#ifdef CONFIG_USBHOST_HIDMOUSE
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/* Initialize the HID mouse class */
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ret = usbhost_mouse_init();
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if (ret != OK)
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{
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uerr("ERROR: Failed to register the HID mouse class\n");
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}
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#endif
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/* Then get an instance of the USB host interface */
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uinfo("Initialize USB host\n");
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g_usbconn = stm32_otgfshost_initialize(0);
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if (g_usbconn)
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{
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/* Start a thread to handle device connection. */
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uinfo("Start usbhost_waiter\n");
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pid = kthread_create("usbhost", CONFIG_STM32F7F4DISCO_USBHOST_PRIO,
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CONFIG_STM32F7F4DISCO_USBHOST_STACKSIZE,
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(main_t)usbhost_waiter, (FAR char * const *)NULL);
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return pid < 0 ? -ENOEXEC : OK;
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}
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return -ENODEV;
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}
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#endif
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/***********************************************************************************
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* Name: stm32_usbhost_vbusdrive
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*
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* Description:
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* Enable/disable driving of VBUS 5V output. This function must be provided be
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* each platform that implements the STM32 OTG FS host interface
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*
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* "On-chip 5 V VBUS generation is not supported. For this reason, a charge pump
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* or, if 5 V are available on the application board, a basic power switch, must
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* be added externally to drive the 5 V VBUS line. The external charge pump can
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* be driven by any GPIO output. When the application decides to power on VBUS
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* using the chosen GPIO, it must also set the port power bit in the host port
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* control and status register (PPWR bit in OTG_FS_HPRT).
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*
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* "The application uses this field to control power to this port, and the core
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* clears this bit on an overcurrent condition."
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*
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* Input Parameters:
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* iface - For future growth to handle multiple USB host interface. Should be zero.
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* enable - true: enable VBUS power; false: disable VBUS power
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*
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* Returned Value:
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* None
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*
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***********************************************************************************/
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#ifdef CONFIG_USBHOST
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void stm32_usbhost_vbusdrive(int iface, bool enable)
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{
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DEBUGASSERT(iface == 0);
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if (enable)
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{
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/* Enable the Power Switch by driving the enable pin low */
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stm32_gpiowrite(GPIO_OTGFS_PWRON, false);
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}
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else
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{
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/* Disable the Power Switch by driving the enable pin high */
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stm32_gpiowrite(GPIO_OTGFS_PWRON, true);
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}
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}
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#endif
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/************************************************************************************
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* Name: stm32_setup_overcurrent
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*
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* Description:
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* Setup to receive an interrupt-level callback if an overcurrent condition is
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* detected.
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*
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* Input Parameters:
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* handler - New overcurrent interrupt handler
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* arg - The argument provided for the interrupt handler
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise, a negated errno value is returned
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* to indicate the nature of the failure.
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*
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************************************************************************************/
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#ifdef CONFIG_USBHOST
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int stm32_setup_overcurrent(xcpt_t handler, void *arg)
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{
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return stm32_gpiosetevent(GPIO_OTGFS_OVER, true, true, true, handler, arg);
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}
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#endif
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/************************************************************************************
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* Name: stm32_usbsuspend
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*
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* Description:
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* Board logic must provide the stm32_usbsuspend logic if the USBDEV driver is
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* used. This function is called whenever the USB enters or leaves suspend mode.
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* This is an opportunity for the board logic to shutdown clocks, power, etc.
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* while the USB is suspended.
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*
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************************************************************************************/
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#ifdef CONFIG_USBDEV
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void stm32_usbsuspend(FAR struct usbdev_s *dev, bool resume)
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{
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uinfo("resume: %d\n", resume);
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}
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#endif
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#endif /* CONFIG_STM32F7_OTGFS */
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