init.c

/****************************************************************************
 *
 *   Copyright (c) 2012-2019 PX4 Development Team. All rights reserved.
 *
 * 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 PX4 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.
 *
 ****************************************************************************/

/**
 * @file init.c
 *
 * PX4FMU-specific early startup code.  This file implements the
 * nsh_archinitialize() function that is called early by nsh during startup.
 *
 * Code here is run before the rcS script is invoked; it should start required
 * subsystems and perform board-specific initialisation.
 */

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include "board_config.h"

#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <debug.h>
#include <errno.h>

#include <nuttx/config.h>
#include <nuttx/board.h>
#include <nuttx/spi/spi.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/sdio.h>
#include <nuttx/mmcsd.h>
#include <nuttx/analog/adc.h>
#include <nuttx/mm/gran.h>
#include <chip.h>
#include <stm32_uart.h>
#include <arch/board/board.h>
#include "up_internal.h"

#include <drivers/drv_hrt.h>
#include <drivers/drv_board_led.h>
#include <systemlib/px4_macros.h>
#include <px4_init.h>

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/

/* Configuration ************************************************************/

/*
 * Ideally we'd be able to get these from up_internal.h,
 * but since we want to be able to disable the NuttX use
 * of leds for system indication at will and there is no
 * separate switch, we need to build independent of the
 * CONFIG_ARCH_LEDS configuration switch.
 */
__BEGIN_DECLS
extern void led_init(void);
extern void led_on(int led);
extern void led_off(int led);
__END_DECLS


/************************************************************************************
 * Name: board_rc_input
 *
 * Description:
 *   All boards my optionally provide this API to invert the Serial RC input.
 *   This is needed on SoCs that support the notion RXINV or TXINV as apposed to
 *   and external XOR controlled by a GPIO
 *
 ************************************************************************************/

__EXPORT void board_rc_input(bool invert_on, uint32_t uxart_base)
{

	irqstate_t irqstate = px4_enter_critical_section();

	uint32_t cr1 =	getreg32(STM32_USART_CR1_OFFSET + uxart_base);
	uint32_t cr2 =	getreg32(STM32_USART_CR2_OFFSET + uxart_base);
	uint32_t regval = cr1;

	/* {R|T}XINV bit fields can only be written when the USART is disabled (UE=0). */

	regval &= ~USART_CR1_UE;

	putreg32(regval, STM32_USART_CR1_OFFSET + uxart_base);

	if (invert_on) {
#if defined(BOARD_HAS_RX_TX_SWAP) &&	RC_SERIAL_PORT_IS_SWAPED == 1

		/* This is only ever turned on */

		cr2 |= (USART_CR2_RXINV | USART_CR2_TXINV | USART_CR2_SWAP);
#else
		cr2 |= (USART_CR2_RXINV | USART_CR2_TXINV);
#endif

	} else {
		cr2 &= ~(USART_CR2_RXINV | USART_CR2_TXINV);
	}

	putreg32(cr2, STM32_USART_CR2_OFFSET + uxart_base);
	putreg32(cr1, STM32_USART_CR1_OFFSET + uxart_base);

	leave_critical_section(irqstate);
}

/************************************************************************************
 * Name: board_peripheral_reset
 *
 * Description:
 *
 ************************************************************************************/
__EXPORT void board_peripheral_reset(int ms)
{
	/* set the peripheral rails off */

	VDD_5V_PERIPH_EN(false);
	VDD_3V3_SENSORS_EN(false);

	bool last = READ_VDD_3V3_SPEKTRUM_POWER_EN();
	/* Keep Spektum on to discharge rail*/
	VDD_3V3_SPEKTRUM_POWER_EN(false);

	/* wait for the peripheral rail to reach GND */
	usleep(ms * 1000);
	syslog(LOG_DEBUG, "reset done, %d ms\n", ms);

	/* re-enable power */

	/* switch the peripheral rail back on */
	VDD_3V3_SPEKTRUM_POWER_EN(last);
	VDD_3V3_SENSORS_EN(true);
	VDD_5V_PERIPH_EN(true);

}

/************************************************************************************
 * Name: board_on_reset
 *
 * Description:
 * Optionally provided function called on entry to board_system_reset
 * It should perform any house keeping prior to the rest.
 *
 * status - 1 if resetting to boot loader
 *          0 if just resetting
 *
 ************************************************************************************/
__EXPORT void board_on_reset(int status)
{
	/* configure the GPIO pins to outputs and keep them low */

	const uint32_t gpio[] = PX4_GPIO_PWM_INIT_LIST;
	board_gpio_init(gpio, arraySize(gpio));

	if (status >= 0) {
		up_mdelay(6);
	}
}

/****************************************************************************
 * Name: board_app_finalinitialize
 *
 * Description:
 *   Perform application specific initialization.  This function is never
 *   called directly from application code, but only indirectly via the
 *   (non-standard) boardctl() interface using the command
 *   BOARDIOC_FINALINIT.
 *
 * Input Parameters:
 *   arg - The argument has no meaning.
 *
 * Returned Value:
 *   Zero (OK) is returned on success; a negated errno value is returned on
 *   any failure to indicate the nature of the failure.
 *
 ****************************************************************************/

#ifdef CONFIG_BOARDCTL_FINALINIT
int board_app_finalinitialize(uintptr_t arg)
{
	board_configure_dcache(1);
	return 0;
}
#endif

/************************************************************************************
 * Name: stm32_boardinitialize
 *
 * Description:
 *   All STM32 architectures must provide the following entry point.  This entry point
 *   is called early in the initialization -- after all memory has been configured
 *   and mapped but before any devices have been initialized.
 *
 ************************************************************************************/

__EXPORT void
stm32_boardinitialize(void)
{
	board_on_reset(-1); /* Reset PWM first thing */

	/* configure LEDs */

	board_autoled_initialize();

	/* configure pins */

	const uint32_t gpio[] = PX4_GPIO_INIT_LIST;
	board_gpio_init(gpio, arraySize(gpio));

	/* configure SPI interfaces */

	stm32_spiinitialize();

	/* configure USB interfaces */

	stm32_usbinitialize();

}

/****************************************************************************
 * Name: board_app_initialize
 *
 * Description:
 *   Perform application specific initialization.  This function is never
 *   called directly from application code, but only indirectly via the
 *   (non-standard) boardctl() interface using the command BOARDIOC_INIT.
 *
 * Input Parameters:
 *   arg - The boardctl() argument is passed to the board_app_initialize()
 *         implementation without modification.  The argument has no
 *         meaning to NuttX; the meaning of the argument is a contract
 *         between the board-specific initalization logic and the the
 *         matching application logic.  The value cold be such things as a
 *         mode enumeration value, a set of DIP switch switch settings, a
 *         pointer to configuration data read from a file or serial FLASH,
 *         or whatever you would like to do with it.  Every implementation
 *         should accept zero/NULL as a default configuration.
 *
 * Returned Value:
 *   Zero (OK) is returned on success; a negated errno value is returned on
 *   any failure to indicate the nature of the failure.
 *
 ****************************************************************************/


__EXPORT int board_app_initialize(uintptr_t arg)
{
	/* Power on Interfaces */

	board_configure_dcache(0);

	VDD_3V3_SD_CARD_EN(true);
	VDD_5V_PERIPH_EN(true);
	VDD_5V_HIPOWER_EN(true);
	VDD_3V3_SENSORS_EN(true);
	VDD_3V3_SPEKTRUM_POWER_EN(true);
	VDD_5V_RC_EN(true);
	VDD_5V_WIFI_EN(true);


	if (OK == board_determine_hw_info()) {
		syslog(LOG_INFO, "[boot] Rev 0x%1x : Ver 0x%1x %s\n", board_get_hw_revision(), board_get_hw_version(),
		       board_get_hw_type_name());

	} else {
		syslog(LOG_ERR, "[boot] Failed to read HW revision and version\n");
	}

	px4_platform_init();

	/* configure the DMA allocator */

	if (board_dma_alloc_init() < 0) {
		syslog(LOG_ERR, "[boot] DMA alloc FAILED\n");
	}

	/* set up the serial DMA polling */
	static struct hrt_call serial_dma_call;
	struct timespec ts;

	/*
	 * Poll at 1ms intervals for received bytes that have not triggered
	 * a DMA event.
	 */
	ts.tv_sec = 0;
	ts.tv_nsec = 1000000;

	hrt_call_every(&serial_dma_call,
		       ts_to_abstime(&ts),
		       ts_to_abstime(&ts),
		       (hrt_callout)stm32_serial_dma_poll,
		       NULL);


	/* initial LED state */
	drv_led_start();
	led_off(LED_RED);
	led_on(LED_GREEN); // Indicate Power.
	led_off(LED_BLUE);

	if (board_hardfault_init(2, true) != 0) {
		led_on(LED_RED);
	}

#ifdef CONFIG_MMCSD
	int ret = stm32_sdio_initialize();

	if (ret != OK) {
		led_on(LED_RED);
		return ret;
	}

#endif /* CONFIG_MMCSD */

	return OK;
}