| 1 | /*
|
|---|
| 2 | * Copyright (c) 2009 Vineeth Pillai
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup kernel_genarch
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /**
|
|---|
| 33 | * @file
|
|---|
| 34 | * @brief pl050 keyboard/mouse driver.
|
|---|
| 35 | *
|
|---|
| 36 | * It takes care of low-level keyboard functions.
|
|---|
| 37 | */
|
|---|
| 38 |
|
|---|
| 39 | #include <genarch/drivers/pl050/pl050.h>
|
|---|
| 40 | #include <arch/asm.h>
|
|---|
| 41 | #include <console/chardev.h>
|
|---|
| 42 | #include <stdlib.h>
|
|---|
| 43 |
|
|---|
| 44 | #define PL050_KEY_RELEASE 0xF0
|
|---|
| 45 | #define PL050_ESC_KEY 0xE0
|
|---|
| 46 | #define PL050_CAPS_SCAN_CODE 0x58
|
|---|
| 47 |
|
|---|
| 48 | /** Structure for pl050's IRQ. */
|
|---|
| 49 | static pl050_t *pl050;
|
|---|
| 50 |
|
|---|
| 51 | static irq_ownership_t pl050_claim(irq_t *irq)
|
|---|
| 52 | {
|
|---|
| 53 | uint8_t status;
|
|---|
| 54 | if ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL)
|
|---|
| 55 | return IRQ_ACCEPT;
|
|---|
| 56 | else {
|
|---|
| 57 | return IRQ_DECLINE;
|
|---|
| 58 | }
|
|---|
| 59 | }
|
|---|
| 60 |
|
|---|
| 61 | static void pl050_irq_handler(irq_t *irq)
|
|---|
| 62 | {
|
|---|
| 63 | uint8_t data;
|
|---|
| 64 | uint8_t status;
|
|---|
| 65 | pl050_instance_t *instance = irq->instance;
|
|---|
| 66 |
|
|---|
| 67 | while ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL) {
|
|---|
| 68 | data = pio_read_8(pl050->data);
|
|---|
| 69 | indev_push_character(instance->kbrdin, data);
|
|---|
| 70 |
|
|---|
| 71 | }
|
|---|
| 72 | }
|
|---|
| 73 |
|
|---|
| 74 | /** Initialize pl050. */
|
|---|
| 75 | pl050_instance_t *pl050_init(pl050_t *dev, inr_t inr)
|
|---|
| 76 | {
|
|---|
| 77 |
|
|---|
| 78 | pl050_instance_t *instance =
|
|---|
| 79 | malloc(sizeof(pl050_instance_t));
|
|---|
| 80 |
|
|---|
| 81 | pl050 = dev;
|
|---|
| 82 |
|
|---|
| 83 | if (instance) {
|
|---|
| 84 | instance->pl050 = dev;
|
|---|
| 85 | instance->kbrdin = NULL;
|
|---|
| 86 |
|
|---|
| 87 | irq_initialize(&instance->irq);
|
|---|
| 88 | instance->irq.inr = inr;
|
|---|
| 89 | instance->irq.claim = pl050_claim;
|
|---|
| 90 | instance->irq.handler = pl050_irq_handler;
|
|---|
| 91 | instance->irq.instance = instance;
|
|---|
| 92 | }
|
|---|
| 93 |
|
|---|
| 94 | return instance;
|
|---|
| 95 | }
|
|---|
| 96 |
|
|---|
| 97 | void pl050_wire(pl050_instance_t *instance, indev_t *kbrdin)
|
|---|
| 98 | {
|
|---|
| 99 | uint8_t val;
|
|---|
| 100 |
|
|---|
| 101 | instance->kbrdin = kbrdin;
|
|---|
| 102 | irq_register(&instance->irq);
|
|---|
| 103 |
|
|---|
| 104 | val = PL050_CR_RXINTR | PL050_CR_INTR;
|
|---|
| 105 |
|
|---|
| 106 | pio_write_8(pl050->ctrl, val);
|
|---|
| 107 |
|
|---|
| 108 | /* reset the data buffer */
|
|---|
| 109 | pio_read_8(pl050->data);
|
|---|
| 110 |
|
|---|
| 111 | }
|
|---|
| 112 |
|
|---|
| 113 | /** @}
|
|---|
| 114 | */
|
|---|
