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| Rev | Author | Line No. | Line |
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| 4377 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2001-2004 Jakub Jermar |
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| 3 | * Copyright (c) 2006 Josef Cejka |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * |
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| 10 | * - Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * - Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * - The name of the author may not be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | */ |
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| 29 | |||
| 30 | /** @addtogroup kbd_port |
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| 31 | * @ingroup kbd |
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| 32 | * @{ |
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| 33 | */ |
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| 34 | /** @file |
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| 35 | * @brief i8042 port driver. |
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| 36 | */ |
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| 37 | |||
| 38 | #include <ddi.h> |
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| 39 | #include <libarch/ddi.h> |
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| 40 | #include <ipc/ipc.h> |
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| 41 | #include <async.h> |
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| 42 | #include <unistd.h> |
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| 43 | #include <sysinfo.h> |
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| 44 | #include <kbd_port.h> |
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| 45 | #include <kbd.h> |
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| 46 | #include <ddi.h> |
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| 47 | #include "i8042.h" |
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| 48 | |||
| 49 | /* Interesting bits for status register */ |
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| 50 | #define i8042_OUTPUT_FULL 0x1 |
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| 51 | #define i8042_INPUT_FULL 0x2 |
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| 52 | #define i8042_MOUSE_DATA 0x20 |
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| 53 | |||
| 54 | /* Command constants */ |
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| 55 | #define i8042_CMD_KBD 0x60 |
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| 56 | #define i8042_CMD_MOUSE 0xd4 |
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| 57 | |||
| 58 | /* Keyboard cmd byte */ |
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| 59 | #define i8042_KBD_IE 0x1 |
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| 60 | #define i8042_MOUSE_IE 0x2 |
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| 61 | #define i8042_KBD_DISABLE 0x10 |
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| 62 | #define i8042_MOUSE_DISABLE 0x20 |
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| 63 | #define i8042_KBD_TRANSLATE 0x40 |
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| 64 | |||
| 65 | /* Mouse constants */ |
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| 66 | #define MOUSE_OUT_INIT 0xf4 |
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| 67 | #define MOUSE_ACK 0xfa |
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| 68 | |||
| 69 | static irq_cmd_t i8042_cmds[] = { |
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| 70 | { |
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| 71 | .cmd = CMD_PIO_READ_8, |
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| 72 | .addr = NULL, /* will be patched in run-time */ |
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| 73 | .dstarg = 1 |
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| 74 | }, |
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| 75 | { |
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| 76 | .cmd = CMD_BTEST, |
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| 77 | .value = i8042_OUTPUT_FULL, |
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| 78 | .srcarg = 1, |
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| 79 | .dstarg = 3 |
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| 80 | }, |
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| 81 | { |
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| 82 | .cmd = CMD_PREDICATE, |
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| 83 | .value = 2, |
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| 84 | .srcarg = 3 |
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| 85 | }, |
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| 86 | { |
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| 87 | .cmd = CMD_PIO_READ_8, |
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| 88 | .addr = NULL, /* will be patched in run-time */ |
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| 89 | .dstarg = 2 |
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| 90 | }, |
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| 91 | { |
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| 92 | .cmd = CMD_ACCEPT |
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| 93 | } |
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| 94 | }; |
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| 95 | |||
| 96 | static irq_code_t i8042_kbd = { |
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| 97 | sizeof(i8042_cmds) / sizeof(irq_cmd_t), |
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| 98 | i8042_cmds |
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| 99 | }; |
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| 100 | |||
| 101 | static uintptr_t i8042_physical; |
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| 102 | static uintptr_t i8042_kernel; |
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| 103 | static i8042_t * i8042; |
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| 104 | |||
| 105 | static void wait_ready(void) { |
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| 106 | while (pio_read_8(&i8042->status) & i8042_INPUT_FULL) |
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| 107 | ; |
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| 108 | } |
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| 109 | |||
| 110 | static void i8042_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
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| 111 | |||
| 112 | int kbd_port_init(void) |
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| 113 | { |
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| 114 | int mouseenabled = 0; |
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| 115 | void *vaddr; |
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| 116 | |||
| 117 | i8042_physical = sysinfo_value("kbd.address.physical"); |
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| 118 | i8042_kernel = sysinfo_value("kbd.address.kernel"); |
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| 119 | if (pio_enable((void *) i8042_physical, sizeof(i8042_t), &vaddr) != 0) |
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| 120 | return -1; |
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| 121 | i8042 = vaddr; |
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| 122 | |||
| 123 | async_set_interrupt_received(i8042_irq_handler); |
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| 124 | |||
| 125 | /* Disable kbd, enable mouse */ |
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| 126 | pio_write_8(&i8042->status, i8042_CMD_KBD); |
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| 127 | wait_ready(); |
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| 128 | pio_write_8(&i8042->status, i8042_CMD_KBD); |
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| 129 | wait_ready(); |
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| 130 | pio_write_8(&i8042->data, i8042_KBD_DISABLE); |
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| 131 | wait_ready(); |
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| 132 | |||
| 133 | /* Flush all current IO */ |
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| 134 | while (pio_read_8(&i8042->status) & i8042_OUTPUT_FULL) |
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| 135 | (void) pio_read_8(&i8042->data); |
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| 136 | |||
| 137 | /* Enable kbd */ |
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| 138 | i8042_kbd.cmds[0].addr = &((i8042_t *) i8042_kernel)->status; |
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| 139 | i8042_kbd.cmds[3].addr = &((i8042_t *) i8042_kernel)->data; |
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| 140 | ipc_register_irq(sysinfo_value("kbd.inr"), device_assign_devno(), 0, &i8042_kbd); |
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| 141 | |||
| 142 | int newcontrol = i8042_KBD_IE | i8042_KBD_TRANSLATE; |
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| 143 | if (mouseenabled) |
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| 144 | newcontrol |= i8042_MOUSE_IE; |
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| 145 | |||
| 146 | pio_write_8(&i8042->status, i8042_CMD_KBD); |
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| 147 | wait_ready(); |
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| 148 | pio_write_8(&i8042->data, newcontrol); |
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| 149 | wait_ready(); |
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| 150 | |||
| 151 | return 0; |
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| 152 | } |
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| 153 | |||
| 154 | void kbd_port_yield(void) |
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| 155 | { |
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| 156 | } |
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| 157 | |||
| 158 | void kbd_port_reclaim(void) |
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| 159 | { |
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| 160 | } |
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| 161 | |||
| 162 | static void i8042_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
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| 163 | { |
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| 164 | int status = IPC_GET_ARG1(*call); |
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| 165 | |||
| 166 | if ((status & i8042_MOUSE_DATA)) |
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| 167 | return; |
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| 168 | |||
| 169 | int scan_code = IPC_GET_ARG2(*call); |
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| 170 | |||
| 171 | kbd_push_scancode(scan_code); |
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| 172 | return; |
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| 173 | } |
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| 174 | |||
| 175 | /** |
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| 176 | * @} |
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| 177 | */ |