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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4043 | jermar | 1 | /* |
| 2 | * Copyright (c) 2009 Jakub Jermar |
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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 | |||
| 4092 | decky | 29 | /** @addtogroup genarch |
| 4043 | jermar | 30 | * @{ |
| 31 | */ |
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| 32 | /** |
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| 33 | * @file |
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| 4092 | decky | 34 | * @brief Serial line processing. |
| 4043 | jermar | 35 | */ |
| 36 | |||
| 37 | #include <genarch/srln/srln.h> |
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| 38 | #include <console/chardev.h> |
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| 39 | #include <console/console.h> |
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| 40 | #include <proc/thread.h> |
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| 41 | #include <arch.h> |
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| 4223 | decky | 42 | #include <string.h> |
| 4043 | jermar | 43 | |
| 4311 | decky | 44 | static indev_operations_t srln_raw_ops = { |
| 4092 | decky | 45 | .poll = NULL |
| 4043 | jermar | 46 | }; |
| 47 | |||
| 48 | static void ksrln(void *arg) |
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| 49 | { |
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| 4311 | decky | 50 | srln_instance_t *instance = (srln_instance_t *) arg; |
| 4092 | decky | 51 | bool cr = false; |
| 4223 | decky | 52 | uint32_t escape = 0; |
| 4092 | decky | 53 | |
| 54 | while (true) { |
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| 4311 | decky | 55 | wchar_t ch = indev_pop_character(&instance->raw); |
| 4043 | jermar | 56 | |
| 4223 | decky | 57 | /* ANSI escape sequence processing */ |
| 58 | if (escape != 0) { |
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| 59 | escape <<= 8; |
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| 60 | escape |= ch & 0xff; |
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| 61 | |||
| 62 | if ((escape == 0x1b4f) || (escape == 0x1b5b) || (escape == 0x1b5b33)) |
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| 63 | continue; |
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| 64 | |||
| 65 | switch (escape) { |
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| 66 | case 0x1b4f46: |
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| 67 | case 0x1b5b46: |
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| 68 | ch = U_END_ARROW; |
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| 69 | escape = 0; |
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| 70 | break; |
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| 71 | case 0x1b4f48: |
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| 72 | case 0x1b5b48: |
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| 73 | ch = U_HOME_ARROW; |
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| 74 | escape = 0; |
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| 75 | break; |
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| 76 | case 0x1b5b41: |
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| 77 | ch = U_UP_ARROW; |
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| 78 | escape = 0; |
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| 79 | break; |
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| 80 | case 0x1b5b42: |
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| 81 | ch = U_DOWN_ARROW; |
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| 82 | escape = 0; |
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| 83 | break; |
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| 84 | case 0x1b5b43: |
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| 85 | ch = U_RIGHT_ARROW; |
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| 86 | escape = 0; |
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| 87 | break; |
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| 88 | case 0x1b5b44: |
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| 89 | ch = U_LEFT_ARROW; |
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| 90 | escape = 0; |
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| 91 | break; |
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| 92 | case 0x1b5b337e: |
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| 93 | ch = U_DELETE; |
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| 94 | escape = 0; |
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| 95 | break; |
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| 96 | default: |
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| 97 | escape = 0; |
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| 98 | } |
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| 99 | } |
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| 100 | |||
| 101 | if (ch == 0x1b) { |
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| 102 | escape = ch & 0xff; |
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| 103 | continue; |
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| 104 | } |
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| 105 | |||
| 106 | /* Replace carriage return with line feed |
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| 107 | and suppress any following line feed */ |
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| 4092 | decky | 108 | if ((ch == '\n') && (cr)) { |
| 109 | cr = false; |
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| 4043 | jermar | 110 | continue; |
| 4092 | decky | 111 | } |
| 4043 | jermar | 112 | |
| 4092 | decky | 113 | if (ch == '\r') { |
| 114 | ch = '\n'; |
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| 115 | cr = true; |
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| 116 | } else |
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| 117 | cr = false; |
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| 118 | |||
| 4223 | decky | 119 | /* Backspace */ |
| 4092 | decky | 120 | if (ch == 0x7f) |
| 121 | ch = '\b'; |
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| 122 | |||
| 4311 | decky | 123 | indev_push_character(instance->sink, ch); |
| 4043 | jermar | 124 | } |
| 125 | } |
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| 126 | |||
| 4311 | decky | 127 | srln_instance_t *srln_init(void) |
| 4043 | jermar | 128 | { |
| 4311 | decky | 129 | srln_instance_t *instance |
| 130 | = malloc(sizeof(srln_instance_t), FRAME_ATOMIC); |
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| 131 | if (instance) { |
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| 132 | instance->thread |
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| 133 | = thread_create(ksrln, (void *) instance, TASK, 0, "ksrln", false); |
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| 134 | |||
| 135 | if (!instance->thread) { |
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| 136 | free(instance); |
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| 137 | return NULL; |
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| 138 | } |
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| 139 | |||
| 140 | instance->sink = NULL; |
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| 141 | indev_initialize("srln", &instance->raw, &srln_raw_ops); |
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| 142 | } |
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| 4043 | jermar | 143 | |
| 4311 | decky | 144 | return instance; |
| 4043 | jermar | 145 | } |
| 146 | |||
| 4311 | decky | 147 | indev_t *srln_wire(srln_instance_t *instance, indev_t *sink) |
| 148 | { |
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| 149 | ASSERT(instance); |
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| 150 | ASSERT(sink); |
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| 151 | |||
| 152 | instance->sink = sink; |
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| 153 | thread_ready(instance->thread); |
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| 154 | |||
| 155 | return &instance->raw; |
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| 156 | } |
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| 157 | |||
| 4043 | jermar | 158 | /** @} |
| 4052 | jermar | 159 | */ |