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/****************************************************************************
* Driver for shared features of ARMIO modules
*
* Copyright (C) 2011 Stefan Richter. All rights reserved.
* Author: Stefan Richter <ichgeh@l--putt.de>
*
* 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.
*
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include <arch/calypso/memory.h>
#include <arch/calypso/armio.h>
#include "up_arch.h"
/****************************************************************************
* HW access
****************************************************************************/
#define BASE_ADDR_ARMIO 0xfffe4800
#define ARMIO_REG(x) ((void *)BASE_ADDR_ARMIO + (x))
enum armio_reg {
LATCH_IN = 0x00,
LATCH_OUT = 0x02,
IO_CNTL = 0x04,
CNTL_REG = 0x06,
LOAD_TIM = 0x08,
KBR_LATCH_REG = 0x0a,
KBC_REG = 0x0c,
BUZZ_LIGHT_REG = 0x0e,
LIGHT_LEVEL = 0x10,
BUZZER_LEVEL = 0x12,
GPIO_EVENT_MODE = 0x14,
KBD_GPIO_INT = 0x16,
KBD_GPIO_MASKIT = 0x18,
GPIO_DEBOUNCING = 0x1a,
GPIO_LATCH = 0x1c,
};
#define KBD_INT (1<<0)
#define GPIO_INT (1<<1)
/****************************************************************************
* ARMIO interrupt handler
* forward keypad events
* forward GPIO events
****************************************************************************/
static int kbd_gpio_irq(int irq, uint32_t *regs)
{
calypso_kbd_irq();
return 0;
}
/****************************************************************************
* Initialize ARMIO
****************************************************************************/
void calypso_armio(void)
{
/* Enable ARMIO clock */
putreg16(1<<5, ARMIO_REG(CNTL_REG));
/* Mask GPIO interrupt and keypad interrupt */
putreg16(KBD_INT|GPIO_INT, ARMIO_REG(KBD_GPIO_MASKIT));
/* Attach and enable the interrupt */
irq_attach(IRQ_KEYPAD_GPIO, (xcpt_t)kbd_gpio_irq);
up_enable_irq(IRQ_KEYPAD_GPIO);
}
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