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| Rev | Author | Line No. | Line |
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| 2064 | vana | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2001-2004 Jakub Jermar |
| 2064 | vana | 3 | * All rights reserved. |
| 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 ia32 |
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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 EGA driver. |
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| 35 | */ |
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| 36 | |||
| 37 | #include <putchar.h> |
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| 38 | #include <mm/page.h> |
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| 39 | #include <mm/as.h> |
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| 40 | #include <arch/mm/page.h> |
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| 41 | #include <synch/spinlock.h> |
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| 42 | #include <arch/types.h> |
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| 43 | #include <arch/asm.h> |
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| 44 | #include <memstr.h> |
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| 45 | #include <console/chardev.h> |
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| 46 | #include <console/console.h> |
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| 47 | #include <sysinfo/sysinfo.h> |
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| 2110 | jermar | 48 | #include <arch/drivers/ega.h> |
| 3635 | vana | 49 | #include <ddi/ddi.h> |
| 2064 | vana | 50 | |
| 3635 | vana | 51 | |
| 2064 | vana | 52 | /* |
| 53 | * The EGA driver. |
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| 54 | * Simple and short. Function for displaying characters and "scrolling". |
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| 55 | */ |
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| 56 | |||
| 3635 | vana | 57 | |
| 58 | static parea_t ega_parea; /**< Physical memory area for EGA video RAM. */ |
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| 59 | |||
| 60 | |||
| 2064 | vana | 61 | SPINLOCK_INITIALIZE(egalock); |
| 62 | static uint32_t ega_cursor; |
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| 63 | static uint8_t *videoram; |
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| 64 | |||
| 65 | static void ega_putchar(chardev_t *d, const char ch); |
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| 66 | |||
| 67 | chardev_t ega_console; |
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| 68 | static chardev_operations_t ega_ops = { |
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| 69 | .write = ega_putchar |
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| 70 | }; |
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| 71 | |||
| 72 | |||
| 73 | void ega_init(void) |
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| 74 | { |
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| 75 | videoram = (uint8_t *) (VIDEORAM); |
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| 76 | |||
| 2110 | jermar | 77 | /* |
| 78 | * Clear the screen. |
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| 79 | */ |
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| 3104 | svoboda | 80 | _memsetw(videoram, SCREEN, 0x0720); |
| 2110 | jermar | 81 | |
| 2064 | vana | 82 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
| 83 | stdout = &ega_console; |
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| 3635 | vana | 84 | |
| 85 | |||
| 86 | ega_parea.pbase = VIDEORAM & 0xffffffff; |
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| 87 | ega_parea.vbase = (uintptr_t) videoram; |
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| 88 | ega_parea.frames = 1; |
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| 89 | ega_parea.cacheable = false; |
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| 90 | ddi_parea_register(&ega_parea); |
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| 91 | |||
| 2064 | vana | 92 | |
| 93 | sysinfo_set_item_val("fb", NULL, true); |
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| 94 | sysinfo_set_item_val("fb.kind", NULL, 2); |
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| 95 | sysinfo_set_item_val("fb.width", NULL, ROW); |
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| 96 | sysinfo_set_item_val("fb.height", NULL, ROWS); |
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| 3635 | vana | 97 | sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM & 0xffffffff); |
| 2064 | vana | 98 | |
| 99 | #ifndef CONFIG_FB |
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| 100 | putchar('\n'); |
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| 101 | #endif |
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| 102 | } |
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| 103 | |||
| 104 | static void ega_display_char(char ch) |
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| 105 | { |
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| 106 | videoram[ega_cursor * 2] = ch; |
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| 2110 | jermar | 107 | videoram[ega_cursor * 2 + 1] = 7; |
| 2064 | vana | 108 | } |
| 109 | |||
| 110 | /* |
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| 111 | * This function takes care of scrolling. |
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| 112 | */ |
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| 113 | static void ega_check_cursor(void) |
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| 114 | { |
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| 115 | if (ega_cursor < SCREEN) |
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| 116 | return; |
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| 117 | |||
| 118 | memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2); |
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| 3104 | svoboda | 119 | _memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
| 2064 | vana | 120 | ega_cursor = ega_cursor - ROW; |
| 121 | } |
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| 122 | |||
| 123 | void ega_putchar(chardev_t *d, const char ch) |
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| 124 | { |
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| 125 | ipl_t ipl; |
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| 126 | |||
| 127 | ipl = interrupts_disable(); |
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| 128 | spinlock_lock(&egalock); |
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| 129 | |||
| 130 | switch (ch) { |
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| 2065 | jermar | 131 | case '\n': |
| 132 | ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW; |
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| 133 | break; |
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| 134 | case '\t': |
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| 135 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
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| 136 | break; |
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| 137 | case '\b': |
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| 138 | if (ega_cursor % ROW) |
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| 139 | ega_cursor--; |
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| 140 | break; |
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| 141 | default: |
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| 142 | ega_display_char(ch); |
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| 143 | ega_cursor++; |
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| 144 | break; |
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| 2064 | vana | 145 | } |
| 146 | ega_check_cursor(); |
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| 147 | |||
| 148 | spinlock_unlock(&egalock); |
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| 149 | interrupts_restore(ipl); |
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| 150 | } |
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| 151 | |||
| 152 | /** @} |
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| 153 | */ |