/configs/stm3220g-eval/src/stm32_usb.c
C | 311 lines | 121 code | 51 blank | 139 comment | 10 complexity | 0fca7875c2810d903f78be222fca3a91 MD5 | raw file
Possible License(s): 0BSD
- /************************************************************************************
- * configs/stm3220g-eval/src/stm32_usb.c
- *
- * Copyright (C) 2012-2013, 2015, 2017 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/kthread.h>
- #include <nuttx/usb/usbdev.h>
- #include <nuttx/usb/usbhost.h>
- #include <nuttx/usb/usbdev_trace.h>
- #include "up_arch.h"
- #include "stm32.h"
- #include "stm32_otgfs.h"
- #include "stm3220g-eval.h"
- #ifdef CONFIG_STM32_OTGFS
- /************************************************************************************
- * Pre-processor Definitions
- ************************************************************************************/
- #if defined(CONFIG_USBDEV) || defined(CONFIG_USBHOST)
- # define HAVE_USB 1
- #else
- # warning "CONFIG_STM32_OTGFS is enabled but neither CONFIG_USBDEV nor CONFIG_USBHOST"
- # undef HAVE_USB
- #endif
- #ifndef CONFIG_USBHOST_DEFPRIO
- # define CONFIG_USBHOST_DEFPRIO 50
- #endif
- #ifndef CONFIG_USBHOST_STACKSIZE
- # ifdef CONFIG_USBHOST_HUB
- # define CONFIG_USBHOST_STACKSIZE 1536
- # else
- # define CONFIG_USBHOST_STACKSIZE 1024
- # endif
- #endif
- /************************************************************************************
- * Private Data
- ************************************************************************************/
- #ifdef CONFIG_USBHOST
- static struct usbhost_connection_s *g_usbconn;
- #endif
- /************************************************************************************
- * Private Functions
- ************************************************************************************/
- /************************************************************************************
- * Name: usbhost_waiter
- *
- * Description:
- * Wait for USB devices to be connected.
- *
- ************************************************************************************/
- #ifdef CONFIG_USBHOST
- static int usbhost_waiter(int argc, char *argv[])
- {
- struct usbhost_hubport_s *hport;
- uinfo("Running\n");
- for (;;)
- {
- /* Wait for the device to change state */
- DEBUGVERIFY(CONN_WAIT(g_usbconn, &hport));
- uinfo("%s\n", hport->connected ? "connected" : "disconnected");
- /* Did we just become connected? */
- if (hport->connected)
- {
- /* Yes.. enumerate the newly connected device */
- (void)CONN_ENUMERATE(g_usbconn, hport);
- }
- }
- /* Keep the compiler from complaining */
- return 0;
- }
- #endif
- /************************************************************************************
- * Public Functions
- ************************************************************************************/
- /************************************************************************************
- * Name: stm32_usbinitialize
- *
- * Description:
- * Called from stm32_usbinitialize very early in inialization to setup USB-related
- * GPIO pins for the STM3220G-EVAL board.
- *
- ************************************************************************************/
- void stm32_usbinitialize(void)
- {
- #ifdef HAVE_USB
- /* The OTG FS has an internal soft pull-up. No GPIO configuration is required */
- /* Configure the OTG FS VBUS sensing GPIO, Power On, and Overcurrent GPIOs */
- stm32_configgpio(GPIO_OTGFS_VBUS);
- stm32_configgpio(GPIO_OTGFS_PWRON);
- stm32_configgpio(GPIO_OTGFS_OVER);
- #endif
- }
- /***********************************************************************************
- * Name: stm32_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.
- *
- ***********************************************************************************/
- #ifdef CONFIG_USBHOST
- int stm32_usbhost_initialize(void)
- {
- int pid;
- int ret;
- /* First, register all of the class drivers needed to support the drivers
- * that we care about:
- */
- uinfo("Register class drivers\n");
- #ifdef CONFIG_USBHOST_MSC
- /* Register the USB mass storage class class */
- ret = usbhost_msc_initialize();
- if (ret != OK)
- {
- uerr("ERROR: Failed to register the mass storage class: %d\n", ret);
- }
- #endif
- #ifdef CONFIG_USBHOST_CDCACM
- /* Register the CDC/ACM serial class */
- ret = usbhost_cdcacm_initialize();
- if (ret != OK)
- {
- uerr("ERROR: Failed to register the CDC/ACM serial class: %d\n", ret);
- }
- #endif
- /* Then get an instance of the USB host interface */
- uinfo("Initialize USB host\n");
- g_usbconn = stm32_otgfshost_initialize(0);
- if (g_usbconn)
- {
- /* Start a thread to handle device connection. */
- uinfo("Start usbhost_waiter\n");
- pid = kthread_create("usbhost", CONFIG_USBHOST_DEFPRIO,
- CONFIG_USBHOST_STACKSIZE,
- (main_t)usbhost_waiter, (FAR char * const *)NULL);
- return pid < 0 ? -ENOEXEC : OK;
- }
- return -ENODEV;
- }
- #endif
- /***********************************************************************************
- * Name: stm32_usbhost_vbusdrive
- *
- * Description:
- * Enable/disable driving of VBUS 5V output. This function must be provided be
- * each platform that implements the STM32 OTG FS host interface
- *
- * "On-chip 5 V VBUS generation is not supported. For this reason, a charge pump
- * or, if 5 V are available on the application board, a basic power switch, must
- * be added externally to drive the 5 V VBUS line. The external charge pump can
- * be driven by any GPIO output. When the application decides to power on VBUS
- * using the chosen GPIO, it must also set the port power bit in the host port
- * control and status register (PPWR bit in OTG_FS_HPRT).
- *
- * "The application uses this field to control power to this port, and the core
- * clears this bit on an overcurrent condition."
- *
- * Input Parameters:
- * iface - For future growth to handle multiple USB host interface. Should be zero.
- * enable - true: enable VBUS power; false: disable VBUS power
- *
- * Returned Value:
- * None
- *
- ***********************************************************************************/
- #ifdef CONFIG_USBHOST
- void stm32_usbhost_vbusdrive(int iface, bool enable)
- {
- DEBUGASSERT(iface == 0);
- if (enable)
- {
- /* Enable the Power Switch by driving the enable pin low */
- stm32_gpiowrite(GPIO_OTGFS_PWRON, false);
- }
- else
- {
- /* Disable the Power Switch by driving the enable pin high */
- stm32_gpiowrite(GPIO_OTGFS_PWRON, true);
- }
- }
- #endif
- /************************************************************************************
- * Name: stm32_setup_overcurrent
- *
- * Description:
- * Setup to receive an interrupt-level callback if an overcurrent condition is
- * detected.
- *
- * Input Parameters:
- * handler - New overcurrent interrupt handler
- * arg - The argument provided for the interrupt handler
- *
- * Returned Value:
- * Zero (OK) is returned on success. Otherwise, a negated errno value is returned
- * to indicate the nature of the failure.
- *
- ************************************************************************************/
- #ifdef CONFIG_USBHOST
- int stm32_setup_overcurrent(xcpt_t handler, void *arg)
- {
- return stm32_gpiosetevent(GPIO_OTGFS_OVER, true, true, true, handler, arg);
- }
- #endif
- /************************************************************************************
- * Name: stm32_usbsuspend
- *
- * Description:
- * Board logic must provide the stm32_usbsuspend logic if the USBDEV driver is
- * used. This function is called whenever the USB enters or leaves suspend mode.
- * This is an opportunity for the board logic to shutdown clocks, power, etc.
- * while the USB is suspended.
- *
- ************************************************************************************/
- #ifdef CONFIG_USBDEV
- void stm32_usbsuspend(FAR struct usbdev_s *dev, bool resume)
- {
- uinfo("resume: %d\n", resume);
- }
- #endif
- #endif /* CONFIG_STM32_OTGFS */