0,0 → 1,117 |
/* |
* 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); |
|
} |
|
|
/** @} |
*/ |