Rev 4651 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4651 | pillai | 1 | /* |
| 2 | * Copyright (c) 2009 Vineeth Pillai |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup genarch |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** |
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| 33 | * @file |
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| 34 | * @brief pl050 keyboard/mouse driver. |
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| 35 | * |
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| 36 | * It takes care of low-level keyboard functions. |
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| 37 | */ |
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| 38 | |||
| 39 | #include <genarch/drivers/pl050/pl050.h> |
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| 40 | #include <arch/asm.h> |
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| 41 | #include <console/chardev.h> |
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| 42 | #include <mm/slab.h> |
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| 43 | #include <ddi/device.h> |
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| 44 | |||
| 45 | #define PL050_KEY_RELEASE 0xF0 |
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| 46 | #define PL050_ESC_KEY 0xE0 |
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| 47 | #define PL050_CAPS_SCAN_CODE 0x58 |
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| 48 | |||
| 49 | /** Structure for pl050's IRQ. */ |
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| 50 | static pl050_t *pl050; |
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| 51 | |||
| 52 | static irq_ownership_t pl050_claim(irq_t *irq) |
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| 53 | { |
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| 54 | uint8_t status; |
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| 55 | if ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL) |
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| 56 | return IRQ_ACCEPT; |
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| 57 | else { |
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| 58 | return IRQ_DECLINE; |
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| 59 | } |
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| 60 | } |
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| 61 | |||
| 62 | static void pl050_irq_handler(irq_t *irq) |
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| 63 | { |
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| 64 | uint8_t data; |
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| 65 | uint8_t status; |
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| 66 | pl050_instance_t *instance = irq->instance; |
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| 67 | |||
| 68 | while ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL) { |
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| 69 | data = pio_read_8(pl050->data); |
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| 70 | indev_push_character(instance->kbrdin, data); |
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| 71 | |||
| 72 | } |
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| 73 | } |
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| 74 | |||
| 75 | /** Initialize pl050. */ |
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| 76 | pl050_instance_t *pl050_init(pl050_t *dev, inr_t inr) |
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| 77 | { |
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| 78 | |||
| 79 | pl050_instance_t *instance = |
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| 80 | malloc(sizeof(pl050_instance_t), FRAME_ATOMIC); |
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| 81 | |||
| 82 | pl050 = dev; |
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| 83 | |||
| 84 | if (instance) { |
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| 85 | instance->pl050 = dev; |
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| 86 | instance->kbrdin = NULL; |
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| 87 | |||
| 88 | irq_initialize(&instance->irq); |
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| 89 | instance->irq.devno = device_assign_devno(); |
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| 90 | instance->irq.inr = inr; |
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| 91 | instance->irq.claim = pl050_claim; |
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| 92 | instance->irq.handler = pl050_irq_handler; |
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| 93 | instance->irq.instance = instance; |
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| 94 | } |
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| 95 | |||
| 96 | return instance; |
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| 97 | } |
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| 98 | |||
| 99 | void pl050_wire(pl050_instance_t *instance, indev_t *kbrdin) |
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| 100 | { |
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| 101 | uint8_t val; |
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| 102 | |||
| 103 | instance->kbrdin = kbrdin; |
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| 104 | irq_register(&instance->irq); |
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| 105 | |||
| 106 | val = PL050_CR_RXINTR | PL050_CR_INTR; |
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| 107 | |||
| 108 | pio_write_8(pl050->ctrl, val); |
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| 109 | |||
| 110 | /* reset the data buffer */ |
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| 111 | pio_read_8(pl050->data); |
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| 112 | |||
| 113 | } |
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| 114 | |||
| 115 | |||
| 116 | /** @} |
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| 117 | */ |