/*
* Copyright (c) 2009 Vineeth Pillai
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/** @addtogroup genarch
* @{
*/
/**
* @file
* @brief pl050 keyboard/mouse driver.
*
* It takes care of low-level keyboard functions.
*/
#include <genarch/drivers/pl050/pl050.h>
#include <arch/asm.h>
#include <console/chardev.h>
#include <mm/slab.h>
#include <ddi/device.h>
#define PL050_KEY_RELEASE 0xF0
#define PL050_ESC_KEY 0xE0
#define PL050_CAPS_SCAN_CODE 0x58
/** Structure for pl050's IRQ. */
static pl050_t *pl050;
static irq_ownership_t pl050_claim(irq_t *irq)
{
uint8_t status;
if ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL)
return IRQ_ACCEPT;
else {
return IRQ_DECLINE;
}
}
static void pl050_irq_handler(irq_t *irq)
{
uint8_t data;
uint8_t status;
pl050_instance_t *instance = irq->instance;
while ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL) {
data = pio_read_8(pl050->data);
indev_push_character(instance->kbrdin, data);
}
}
/** Initialize pl050. */
pl050_instance_t *pl050_init(pl050_t *dev, inr_t inr)
{
pl050_instance_t *instance =
malloc(sizeof(pl050_instance_t
), FRAME_ATOMIC
);
pl050 = dev;
if (instance) {
instance->pl050 = dev;
instance->kbrdin = NULL;
irq_initialize(&instance->irq);
instance->irq.devno = device_assign_devno();
instance->irq.inr = inr;
instance->irq.claim = pl050_claim;
instance->irq.handler = pl050_irq_handler;
instance->irq.instance = instance;
}
return instance;
}
void pl050_wire(pl050_instance_t *instance, indev_t *kbrdin)
{
uint8_t val;
instance->kbrdin = kbrdin;
irq_register(&instance->irq);
val = PL050_CR_RXINTR | PL050_CR_INTR;
pio_write_8(pl050->ctrl, val);
/* reset the data buffer */
pio_read_8(pl050->data);
}
/** @}
*/