Rev 4419 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4419 | trochtova | 1 | /* |
| 2 | * Copyright (c) 2005 Jakub Jermar |
||
| 3 | * Copyright (c) 2009 Jiri Svoboda |
||
| 4 | * All rights reserved. |
||
| 5 | * |
||
| 6 | * Redistribution and use in source and binary forms, with or without |
||
| 7 | * modification, are permitted provided that the following conditions |
||
| 8 | * are met: |
||
| 9 | * |
||
| 10 | * - Redistributions of source code must retain the above copyright |
||
| 11 | * notice, this list of conditions and the following disclaimer. |
||
| 12 | * - Redistributions in binary form must reproduce the above copyright |
||
| 13 | * notice, this list of conditions and the following disclaimer in the |
||
| 14 | * documentation and/or other materials provided with the distribution. |
||
| 15 | * - The name of the author may not be used to endorse or promote products |
||
| 16 | * derived from this software without specific prior written permission. |
||
| 17 | * |
||
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 28 | */ |
||
| 29 | |||
| 30 | /** @addtogroup kbd_port |
||
| 31 | * @ingroup kbd |
||
| 32 | * @{ |
||
| 33 | */ |
||
| 34 | /** @file |
||
| 35 | * @brief Ski console keyboard port driver. |
||
| 36 | */ |
||
| 37 | |||
| 38 | |||
| 39 | #include <stdlib.h> |
||
| 40 | #include <unistd.h> |
||
| 41 | #include <kbd.h> |
||
| 42 | #include <kbd_port.h> |
||
| 43 | #include <sys/types.h> |
||
| 44 | #include <thread.h> |
||
| 4420 | trochtova | 45 | #include <bool.h> |
| 4419 | trochtova | 46 | |
| 47 | #define SKI_GETCHAR 21 |
||
| 48 | |||
| 49 | #define POLL_INTERVAL 10000 |
||
| 50 | |||
| 51 | static void *ski_thread_impl(void *arg); |
||
| 52 | static int32_t ski_getchar(void); |
||
| 53 | |||
| 4420 | trochtova | 54 | static volatile bool polling_disabled = false; |
| 55 | |||
| 4419 | trochtova | 56 | /** Initialize Ski port driver. */ |
| 57 | int kbd_port_init(void) |
||
| 58 | { |
||
| 59 | thread_id_t tid; |
||
| 60 | int rc; |
||
| 61 | |||
| 62 | rc = thread_create(ski_thread_impl, NULL, "kbd_poll", &tid); |
||
| 63 | if (rc != 0) { |
||
| 64 | return rc; |
||
| 65 | } |
||
| 66 | |||
| 67 | return 0; |
||
| 68 | } |
||
| 69 | |||
| 4420 | trochtova | 70 | void kbd_port_yield(void) |
| 71 | { |
||
| 72 | polling_disabled = true; |
||
| 73 | } |
||
| 74 | |||
| 75 | void kbd_port_reclaim(void) |
||
| 76 | { |
||
| 77 | polling_disabled = false; |
||
| 78 | } |
||
| 79 | |||
| 4419 | trochtova | 80 | /** Thread to poll Ski for keypresses. */ |
| 81 | static void *ski_thread_impl(void *arg) |
||
| 82 | { |
||
| 83 | int32_t c; |
||
| 84 | (void) arg; |
||
| 85 | |||
| 86 | while (1) { |
||
| 4420 | trochtova | 87 | while (polling_disabled == false) { |
| 4419 | trochtova | 88 | c = ski_getchar(); |
| 89 | if (c == 0) |
||
| 90 | break; |
||
| 91 | kbd_push_scancode(c); |
||
| 92 | } |
||
| 93 | |||
| 94 | usleep(POLL_INTERVAL); |
||
| 95 | } |
||
| 96 | } |
||
| 97 | |||
| 98 | /** Ask Ski if a key was pressed. |
||
| 99 | * |
||
| 100 | * Use SSC (Simulator System Call) to get character from the debug console. |
||
| 101 | * This call is non-blocking. |
||
| 102 | * |
||
| 103 | * @return ASCII code of pressed key or 0 if no key pressed. |
||
| 104 | */ |
||
| 105 | static int32_t ski_getchar(void) |
||
| 106 | { |
||
| 107 | uint64_t ch; |
||
| 108 | |||
| 109 | asm volatile ( |
||
| 110 | "mov r15 = %1\n" |
||
| 111 | "break 0x80000;;\n" /* modifies r8 */ |
||
| 112 | "mov %0 = r8;;\n" |
||
| 113 | |||
| 114 | : "=r" (ch) |
||
| 115 | : "i" (SKI_GETCHAR) |
||
| 116 | : "r15", "r8" |
||
| 117 | ); |
||
| 118 | |||
| 119 | return (int32_t) ch; |
||
| 120 | } |
||
| 121 | |||
| 122 | /** @} |
||
| 123 | */ |