nuttx/arch/arm/src/tiva/tiva_dumpgpio.c

/****************************************************************************
 * arch/arm/src/tiva/tiva_dumpgpio.c
 *
 *   Copyright (C) 2009-2010, 2016 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>

/* Output debug info even if debug output is not selected. */

#undef  CONFIG_DEBUG_INFO
#define CONFIG_DEBUG_INFO 1

#include <stdint.h>
#include <stdbool.h>
#include <debug.h>

#include <nuttx/irq.h>
#include <nuttx/arch.h>

#include "up_arch.h"

#include "chip.h"
#include "tiva_gpio.h"

/****************************************************************************
 * Private Types
 ****************************************************************************/

static const char g_portchar[TIVA_NPORTS] =
{
#if TIVA_NPORTS > 0
    'A'
#endif
#if TIVA_NPORTS > 1
  , 'B'
#endif
#if TIVA_NPORTS > 2
  , 'C'
#endif
#if TIVA_NPORTS > 3
  , 'D'
#endif
#if TIVA_NPORTS > 4
  , 'E'
#endif
#if TIVA_NPORTS > 5
  , 'F'
#endif
#if TIVA_NPORTS > 6
  , 'G'
#endif
#if TIVA_NPORTS > 7
  , 'H'
#endif
#if TIVA_NPORTS > 8
  , 'J'
#endif
#if TIVA_NPORTS > 9
  , 'K'
#endif
#if TIVA_NPORTS > 10
  , 'L'
#endif
#if TIVA_NPORTS > 11
  , 'M'
#endif
#if TIVA_NPORTS > 12
  , 'N'
#endif
#if TIVA_NPORTS > 13
  , 'P'
#endif
#if TIVA_NPORTS > 14
  , 'Q'
#endif
};

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Name: tiva_gpioport
 *
 * Description:
 *   Given a GPIO enumeration value, return the base address of the
 *   associated GPIO registers.
 *
 ****************************************************************************/

static inline uint8_t tiva_gpioport(int port)
{
  return port < TIVA_NPORTS ? g_portchar[port] : '?';
}

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Function:  tiva_dumpgpio
 *
 * Description:
 *   Dump all GPIO registers associated with the provided base address
 *
 ****************************************************************************/

#ifdef CONFIG_DEBUG_GPIO_INFO
int tiva_dumpgpio(uint32_t pinset, const char *msg)
{
  irqstate_t   flags;
  unsigned int port = (pinset & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
  uintptr_t    base;
#ifdef TIVA_SYSCON_RCGCGPIO
  uint32_t     rcgcgpio;
#else
  uint32_t     rcgc2;
#endif
  bool         enabled;

  /* Get the base address associated with the GPIO port */

  base = tiva_gpiobaseaddress(port);
  DEBUGASSERT(base != 0);

  /* The following requires exclusive access to the GPIO registers */

  flags    = enter_critical_section();
#ifdef TIVA_SYSCON_RCGCGPIO
  rcgcgpio = getreg32(TIVA_SYSCON_RCGCGPIO);
  enabled  = ((rcgcgpio & SYSCON_RCGCGPIO(port)) != 0);
#else
  rcgc2    = getreg32(TIVA_SYSCON_RCGC2);
  enabled  = ((rcgc2 & SYSCON_RCGC2_GPIO(port)) != 0);
#endif

  gpioinfo("GPIO%c pinset: %08x base: %08x -- %s\n",
           tiva_gpioport(port), pinset, base, msg);
#ifdef TIVA_SYSCON_RCGCGPIO
  gpioinfo("RCGCGPIO: %08x (%s)\n",
           rcgcgpio, enabled ? "enabled" : "disabled");
#else
  gpioinfo("   RCGC2: %08x (%s)\n",
           rcgc2, enabled ? "enabled" : "disabled");
#endif

  /* Don't bother with the rest unless the port is enabled */

  if (enabled)
    {
      gpioinfo("   AFSEL: %02x DEN: %02x DIR: %02x DATA: %02x\n",
               getreg32(base + TIVA_GPIO_AFSEL_OFFSET), getreg32(base + TIVA_GPIO_DEN_OFFSET),
               getreg32(base + TIVA_GPIO_DIR_OFFSET), getreg32(base + TIVA_GPIO_DATA_OFFSET + 0x3fc));
      gpioinfo("      IS:  %02x IBE: %02x IEV: %02x IM:  %02x RIS: %08x MIS: %08x\n",
               getreg32(base + TIVA_GPIO_IEV_OFFSET), getreg32(base + TIVA_GPIO_IM_OFFSET),
               getreg32(base + TIVA_GPIO_RIS_OFFSET), getreg32(base + TIVA_GPIO_MIS_OFFSET));
      gpioinfo("     2MA:  %02x 4MA: %02x 8MA: %02x ODR: %02x PUR %02x PDR: %02x SLR: %02x\n",
               getreg32(base + TIVA_GPIO_DR2R_OFFSET), getreg32(base + TIVA_GPIO_DR4R_OFFSET),
               getreg32(base + TIVA_GPIO_DR8R_OFFSET), getreg32(base + TIVA_GPIO_ODR_OFFSET),
               getreg32(base + TIVA_GPIO_PUR_OFFSET), getreg32(base + TIVA_GPIO_PDR_OFFSET),
               getreg32(base + TIVA_GPIO_SLR_OFFSET));
    }

  leave_critical_section(flags);
  return OK;
}
#endif /* CONFIG_DEBUG_GPIO_INFO */