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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4044 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2005 Jakub Jermar |
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| 3 | * Copyright (c) 2009 Jiri Svoboda |
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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 Ski console keyboard port driver. |
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| 36 | */ |
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| 37 | |||
| 38 | |||
| 39 | #include <stdlib.h> |
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| 40 | #include <unistd.h> |
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| 41 | #include <kbd.h> |
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| 42 | #include <kbd_port.h> |
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| 43 | #include <sys/types.h> |
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| 44 | #include <thread.h> |
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| 4581 | mejdrech | 45 | #include <bool.h> |
| 4044 | svoboda | 46 | |
| 47 | #define SKI_GETCHAR 21 |
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| 48 | |||
| 49 | #define POLL_INTERVAL 10000 |
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| 50 | |||
| 51 | static void *ski_thread_impl(void *arg); |
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| 52 | static int32_t ski_getchar(void); |
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| 53 | |||
| 4581 | mejdrech | 54 | static volatile bool polling_disabled = false; |
| 55 | |||
| 4044 | svoboda | 56 | /** Initialize Ski port driver. */ |
| 57 | int kbd_port_init(void) |
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| 58 | { |
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| 59 | thread_id_t tid; |
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| 60 | int rc; |
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| 61 | |||
| 62 | rc = thread_create(ski_thread_impl, NULL, "kbd_poll", &tid); |
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| 63 | if (rc != 0) { |
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| 64 | return rc; |
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| 65 | } |
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| 66 | |||
| 67 | return 0; |
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| 68 | } |
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| 69 | |||
| 4581 | mejdrech | 70 | void kbd_port_yield(void) |
| 71 | { |
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| 72 | polling_disabled = true; |
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| 73 | } |
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| 74 | |||
| 75 | void kbd_port_reclaim(void) |
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| 76 | { |
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| 77 | polling_disabled = false; |
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| 78 | } |
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| 79 | |||
| 4044 | svoboda | 80 | /** Thread to poll Ski for keypresses. */ |
| 81 | static void *ski_thread_impl(void *arg) |
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| 82 | { |
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| 83 | int32_t c; |
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| 84 | (void) arg; |
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| 85 | |||
| 86 | while (1) { |
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| 4581 | mejdrech | 87 | while (polling_disabled == false) { |
| 4143 | svoboda | 88 | c = ski_getchar(); |
| 4144 | decky | 89 | if (c == 0) |
| 90 | break; |
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| 4044 | svoboda | 91 | kbd_push_scancode(c); |
| 4143 | svoboda | 92 | } |
| 4044 | svoboda | 93 | |
| 94 | usleep(POLL_INTERVAL); |
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| 95 | } |
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| 96 | } |
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| 97 | |||
| 98 | /** Ask Ski if a key was pressed. |
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| 99 | * |
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| 100 | * Use SSC (Simulator System Call) to get character from the debug console. |
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| 101 | * This call is non-blocking. |
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| 102 | * |
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| 103 | * @return ASCII code of pressed key or 0 if no key pressed. |
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| 104 | */ |
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| 105 | static int32_t ski_getchar(void) |
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| 106 | { |
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| 107 | uint64_t ch; |
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| 108 | |||
| 109 | asm volatile ( |
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| 110 | "mov r15 = %1\n" |
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| 111 | "break 0x80000;;\n" /* modifies r8 */ |
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| 112 | "mov %0 = r8;;\n" |
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| 113 | |||
| 114 | : "=r" (ch) |
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| 115 | : "i" (SKI_GETCHAR) |
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| 116 | : "r15", "r8" |
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| 117 | ); |
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| 118 | |||
| 119 | return (int32_t) ch; |
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| 120 | } |
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| 121 | |||
| 122 | /** @} |
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| 123 | */ |