104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/****************************************************************************
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* Driver for shared features of ARMIO modules
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*
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* Copyright (C) 2011 Stefan Richter. All rights reserved.
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* Author: Stefan Richter <ichgeh@l--putt.de>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.h>
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#include <arch/calypso/memory.h>
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#include <arch/calypso/armio.h>
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#include "up_arch.h"
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/****************************************************************************
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* HW access
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****************************************************************************/
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#define BASE_ADDR_ARMIO 0xfffe4800
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#define ARMIO_REG(x) (BASE_ADDR_ARMIO + (x))
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enum armio_reg {
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LATCH_IN = 0x00,
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LATCH_OUT = 0x02,
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IO_CNTL = 0x04,
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CNTL_REG = 0x06,
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LOAD_TIM = 0x08,
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KBR_LATCH_REG = 0x0a,
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KBC_REG = 0x0c,
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BUZZ_LIGHT_REG = 0x0e,
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LIGHT_LEVEL = 0x10,
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BUZZER_LEVEL = 0x12,
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GPIO_EVENT_MODE = 0x14,
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KBD_GPIO_INT = 0x16,
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KBD_GPIO_MASKIT = 0x18,
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GPIO_DEBOUNCING = 0x1a,
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GPIO_LATCH = 0x1c,
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};
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#define KBD_INT (1 << 0)
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#define GPIO_INT (1 << 1)
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/****************************************************************************
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* ARMIO interrupt handler
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* forward keypad events
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* forward GPIO events
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****************************************************************************/
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static int kbd_gpio_irq(int irq, uint32_t *regs)
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{
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return calypso_kbd_irq(irq, regs);
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}
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/****************************************************************************
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* Initialize ARMIO
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****************************************************************************/
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void calypso_armio(void)
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{
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/* Enable ARMIO clock */
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putreg16(1<<5, ARMIO_REG(CNTL_REG));
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/* Mask GPIO interrupt and keypad interrupt */
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putreg16(KBD_INT|GPIO_INT, ARMIO_REG(KBD_GPIO_MASKIT));
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/* Attach and enable the interrupt */
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irq_attach(IRQ_KEYPAD_GPIO, (xcpt_t)kbd_gpio_irq);
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up_enable_irq(IRQ_KEYPAD_GPIO);
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}
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