175 lines
7.5 KiB
C
175 lines
7.5 KiB
C
/************************************************************************************
|
|
* configs/sure-pic32mx/src/pic32mx_usbdev.c
|
|
*
|
|
* Copyright (C) 2011-2013 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* References:
|
|
* - Sample code and schematics provided with the Sure Electronics PIC32 board.
|
|
*
|
|
* 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 <stdbool.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/usb/usbdev.h>
|
|
|
|
#include "pic32mx.h"
|
|
#include "sure-pic32mx.h"
|
|
|
|
#if defined(CONFIG_PIC32MX_USBDEV)
|
|
|
|
/************************************************************************************
|
|
* Pre-processor Definitions
|
|
************************************************************************************/
|
|
/* The Sure DB_DP11215 PIC32 Storage Demo Board has a CP2102 PHY that is shared
|
|
* between the USB and the UART-to-USB logic. That PHY must be programmed during
|
|
* boot up for USB functionality (since the UART-to-USB is not populated).
|
|
*
|
|
* PIN NAME SIGNAL NOTES
|
|
* ---- ------------------------------- -------------- ------------------------------
|
|
* 11 AN5/C1IN+/Vbuson/CN7/RB5 Vbuson/AN5/RB5 To USB VBUS circuitry
|
|
* 43 U1CTS/SDA1/IC2/INT2/RD9 USB_OPTEN USB PHY
|
|
* 44 SCL1/IC3/PMCS2/PMA15/INT3/RD10 USB_OPT USB PHY
|
|
*/
|
|
|
|
#ifdef CONFIG_ARCH_DBDP11215
|
|
# define GPIO_USB_VBUSON (GPIO_INPUT|GPIO_PORTB|GPIO_PIN5)
|
|
# define GPIO_USB_OPTEN (GPIO_OUTPUT|GPIO_VALUE_ZERO|GPIO_PORTD|GPIO_PIN9)
|
|
# define GPIO_USB_OPT (GPIO_OUTPUT|GPIO_VALUE_ONE|GPIO_PORTD|GPIO_PIN10)
|
|
#endif
|
|
|
|
/************************************************************************************
|
|
* Private Functions
|
|
************************************************************************************/
|
|
|
|
/************************************************************************************
|
|
* Public Functions
|
|
************************************************************************************/
|
|
|
|
/************************************************************************************
|
|
* Name: pic32mx_usbdevinitialize
|
|
*
|
|
* Description:
|
|
* Called to configure the mini-B PHY on the Sure PIC32MX board for the USB device
|
|
*
|
|
************************************************************************************/
|
|
|
|
void weak_function pic32mx_usbdevinitialize(void)
|
|
{
|
|
/* Connect the PHY to the USB mini-B port. Order and timing matter! */
|
|
|
|
#ifdef CONFIG_ARCH_DBDP11215
|
|
pic32mx_configgpio(GPIO_USB_OPTEN);
|
|
pic32mx_configgpio(GPIO_USB_OPT);
|
|
#endif
|
|
|
|
/* Notes from the Sure Electronics sample code:
|
|
*
|
|
* "The USB specifications require that USB peripheral devices must never source
|
|
* current onto the Vbus pin. Additionally, USB peripherals should not source
|
|
* current on D+ or D- when the host/hub is not actively powering the Vbus line.
|
|
* When designing a self powered (as opposed to bus powered) USB peripheral
|
|
* device, the firmware should make sure not to turn on the USB module and D+
|
|
* or D- pull up resistor unless Vbus is actively powered. Therefore, the
|
|
* firmware needs some means to detect when Vbus is being powered by the host.
|
|
* A 5V tolerant I/O pin can be connected to Vbus (through a resistor), and
|
|
* can be used to detect when Vbus is high (host actively powering), or low
|
|
* (host is shut down or otherwise not supplying power). The USB firmware
|
|
* can then periodically poll this I/O pin to know when it is okay to turn on
|
|
* the USB module/D+/D- pull up resistor. When designing a purely bus powered
|
|
* peripheral device, it is not possible to source current on D+ or D- when the
|
|
* host is not actively providing power on Vbus. Therefore, implementing this
|
|
* bus sense feature is optional. ..."
|
|
*/
|
|
|
|
#ifdef CONFIG_USBHOST
|
|
//pic32mx_configgpio(GPIO_USB_VBUSON);
|
|
#endif
|
|
|
|
/* "If the host PC sends a GetStatus (device) request, the firmware must respond
|
|
* and let the host know if the USB peripheral device is currently bus powered
|
|
* or self powered. See chapter 9 in the official USB specifications for details
|
|
* regarding this request. If the peripheral device is capable of being both
|
|
* self and bus powered, it should not return a hard coded value for this request.
|
|
* Instead, firmware should check if it is currently self or bus powered, and
|
|
* respond accordingly. If the hardware has been configured like demonstrated
|
|
* on the PICDEM FS USB Demo Board, an I/O pin can be polled to determine the
|
|
* currently selected power source. ..."
|
|
*/
|
|
|
|
#ifdef CONFIG_USB_PWRSENSE
|
|
//pic32mx_configgpio(GPIO_USB_PWRSENSE);
|
|
#endif
|
|
}
|
|
|
|
/************************************************************************************
|
|
* Name: pic32mx_usbpullup
|
|
*
|
|
* Description:
|
|
* If USB is supported and the board supports a pullup via GPIO (for USB
|
|
* software connect and disconnect), then the board software must provide
|
|
* stm32_pullup. See include/nuttx/usb/usbdev.h for additional description
|
|
* of this method. Alternatively, if no pull-up GPIO the following EXTERN
|
|
* can be redefined to be NULL.
|
|
*
|
|
************************************************************************************/
|
|
|
|
int pic32mx_usbpullup(FAR struct usbdev_s *dev, bool enable)
|
|
{
|
|
/* The Sure PIC32MX does not have a USB pull-up */
|
|
|
|
return OK;
|
|
}
|
|
|
|
/************************************************************************************
|
|
* Name: pic32mx_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.
|
|
*
|
|
************************************************************************************/
|
|
|
|
void pic32mx_usbsuspend(FAR struct usbdev_s *dev, bool resume)
|
|
{
|
|
/* Do nothing */
|
|
}
|
|
|
|
#endif /* CONFIG_PIC32MX_USBDEV */
|