303 lines
8.8 KiB
C
303 lines
8.8 KiB
C
/****************************************************************************
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* boards/arm/stm32/stm3220g-eval/src/stm32_usb.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 "arm_internal.h"
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#include "stm32.h"
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#include "stm32_otgfs.h"
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#include "stm3220g-eval.h"
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#ifdef CONFIG_STM32_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_STM32_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_USBHOST_DEFPRIO
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# define CONFIG_USBHOST_DEFPRIO 50
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#endif
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#ifndef CONFIG_USBHOST_STACKSIZE
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# ifdef CONFIG_USBHOST_HUB
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# define CONFIG_USBHOST_STACKSIZE 1536
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# else
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# define CONFIG_USBHOST_STACKSIZE 1024
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# endif
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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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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
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* USB-related GPIO pins for the STM3220G-EVAL 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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#ifdef HAVE_USB
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/* The OTG FS has an internal soft pull-up.
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* No GPIO configuration is required
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*/
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/* Configure the OTG FS VBUS sensing GPIO,
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* Power On, and Overcurrent GPIOs
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*/
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stm32_configgpio(GPIO_OTGFS_VBUS);
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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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}
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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
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* 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 ret;
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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_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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/* 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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ret = kthread_create("usbhost", CONFIG_USBHOST_DEFPRIO,
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CONFIG_USBHOST_STACKSIZE,
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(main_t)usbhost_waiter, (FAR char * const *)NULL);
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return ret < 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
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* provided be each platform that implements the STM32 OTG FS host
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* interface
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*
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* "On-chip 5 V VBUS generation is not supported. For this reason, a
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* charge pump or, if 5 V are available on the application board, a
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* basic power switch, must be added externally to drive the 5 V VBUS
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* line. The external charge pump can be driven by any GPIO output.
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* When the application decides to power on VBUS using the chosen GPIO,
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* it must also set the port power bit in the host port control and
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* 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,
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* and the core 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.
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* 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
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* condition is 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
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* is returned 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
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* driver is used. This function is called whenever the USB enters or
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* leaves suspend mode. This is an opportunity for the board logic to
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* shutdown clocks, power, etc. 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_STM32_OTGFS */
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