diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/keyboard.c | 142 | ||||
| -rw-r--r-- | drivers/video/framebuffer.c | 109 |
2 files changed, 251 insertions, 0 deletions
diff --git a/drivers/input/keyboard.c b/drivers/input/keyboard.c new file mode 100644 index 0000000..f2a8eba --- /dev/null +++ b/drivers/input/keyboard.c @@ -0,0 +1,142 @@ +#include <kernel/input/keyboard.h> +#include <kernel/tty/tty_vga.h> +#include <kernel/tty.h> +#include <kernel/kthread.h> +#include <kernel/pic.h> +#include <libk/string.h> + +static uint8_t keymap_modifiers[256] = { + [0x1D] KB_CTL, + [0x2A] KB_SHIFT, + [0x36] KB_SHIFT, + [0x38] KB_ALT, + [0x9D] KB_CTL, + [0xB8] KB_ALT +}; + +static uint8_t keymap_toggles[256] = { + [0x3A] KB_CPSLK, + [0x45] KB_NUMLK, + [0x46] KB_SCLLK +}; + +static uint8_t keymap_normal[256] = { + 0, 0x1B, '1', '2', '3', '4', '5', '6', + '7', '8', '9', '0', '-', '=', '\b', '\t', + 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', + 'o', 'p', '[', ']', '\n', 0, 'a', 's', + 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', + '\'', '`', 0, '\\', 'z', 'x', 'c', 'v', + 'b', 'n', 'm', ',', '.', '/', 0, '*', + 0, ' ', 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, '7', + '8', '9', '-', '4', '5', '6', '+', '1', + '2', '3', '0', '.', 0, 0, 0, 0, + [0x9C] '\n', + [0xB5] '/', + [0xC8] KB_UP, + [0xD0] KB_DOWN, + [0xC9] KB_PGUP, + [0xD1] KB_PGDN, + [0xCB] KB_LEFT, + [0xCD] KB_RGHT, + [0x97] KB_HOME, + [0xCF] KB_END, + [0xD2] KB_INS, + [0xD3] KB_DEL +}; + +static uint8_t keymap_shifted[256] = { + 0, 0x33, '!', '@', '#', '$', '%', '^', + '&', '*', '(', ')', '_', '+', '\b', '\t', + 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', + 'O', 'P', '{', '}', '\n', 0, 'A', 'S', + 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', + '"', '~', 0, '|', 'Z', 'X', 'C', 'V', + 'B', 'N', 'M', '<', '>', '?', 0, '*', + 0, ' ', 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, '7', + '8', '9', '-', '4', '5', '6', '+', '1', + '2', '3', '0', '.', 0, 0, 0, 0, + [0x9C] '\n', + [0xB5] '/', + [0xC8] KB_UP, + [0xD0] KB_DOWN, + [0xC9] KB_PGUP, + [0xD1] KB_PGDN, + [0xCB] KB_LEFT, + [0xCD] KB_RGHT, + [0x97] KB_HOME, + [0xCF] KB_END, + [0xD2] KB_INS, + [0xD3] KB_DEL +}; + +static uint8_t keymap_control[256] = { + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + C('Q'), C('W'), C('E'), C('R'), C('T'), C('Y'), C('U'), C('I'), + C('O'), C('P'), 0, 0, '\r', 0, C('A'), C('S'), + C('D'), C('F'), C('G'), C('H'), C('J'), C('K'), C('L'), 0, + 0, 0, 0, C('\\'), C('Z'), C('X'), C('C'), C('V'), + C('B'), C('N'), C('M'), 0, 0, C('/'), 0, 0, + [0x9C] '\r', + [0xB5] C('/'), + [0xC8] KB_UP, + [0xD0] KB_DOWN, + [0xC9] KB_PGUP, + [0xD1] KB_PGDN, + [0xCB] KB_LEFT, + [0xCD] KB_RGHT, + [0x97] KB_HOME, + [0xCF] KB_END, + [0xD2] KB_INS, + [0xD3] KB_DEL +}; + +static uint8_t* keymaps[4] = { + keymap_normal, + keymap_shifted, + keymap_control, + keymap_control, +}; + +char keyboard_getchar(void) { + static int shift = 0; + uint8_t st = inb(KB_STAT); + if ((st & KB_DIB) == 0) + return -1; + + uint8_t data = inb(KB_DATA); + + if (data == 0xE0) { + shift |= KB_E0ESC; + return -1; + } else if (data & 0x80) { + if (!(shift & KB_E0ESC)) + data &= 0x7F; + shift &= ~(keymap_modifiers[data] | KB_E0ESC); + return -1; + } else if (shift & KB_E0ESC) { + data |= 0x80; + shift &= ~KB_E0ESC; + } + + shift |= keymap_modifiers[data]; + shift ^= keymap_toggles[data]; + char c = keymaps[shift & (KB_CTL | KB_SHIFT)][data]; + if (shift & KB_CPSLK) { + if ('a' <= c && c <= 'z') + c += 'A' - 'a'; + else if ('A' <= c && c <= 'Z') + c += 'a' - 'A'; + } + return c; +} + +void keyboard_handler(struct isr_frame *frame) { + char c = keyboard_getchar(); + if (c != -1) + tty_getchar(c); + return; +} diff --git a/drivers/video/framebuffer.c b/drivers/video/framebuffer.c new file mode 100644 index 0000000..3df3df4 --- /dev/null +++ b/drivers/video/framebuffer.c @@ -0,0 +1,109 @@ +#include <kernel/video/framebuffer.h> +#include <kernel/video/vga.h> +#include <kernel/asm.h> +#include <kernel/kthread.h> +#include <kernel/paging.h> +#include <kernel/pic.h> +#include <libk/string.h> +#include <stddef.h> +#include <stdint.h> + +static size_t fb_row; +static size_t fb_column; +static uint8_t fb_color; +static uint16_t *framebuffer; + +void _enable_cursor(uint8_t cursor_start, uint8_t cursor_end) { + outb(0x3D4, 0x0A); + outb(0x3D5, (inb(0x3D5) & 0xC0) | cursor_start); + + outb(0x3D4, 0x0B); + outb(0x3D5, (inb(0x3D5) & 0xE0) | cursor_end); +} + +void _update_cursor(size_t x, size_t y) { + uint16_t pos = y * VGA_WIDTH + x; + + outb(0x3D4, 0x0F); + outb(0x3D5, (uint8_t)(pos & 0xFF)); + outb(0x3D4, 0x0E); + outb(0x3D5, (uint8_t)((pos >> 8) & 0xFF)); +} + +void _fb_putentryat(unsigned char c, uint8_t color, size_t x, size_t y) { + const size_t index = y * VGA_WIDTH + x; + framebuffer[index] = vga_entry(c, color); +} + +void _fb_scroll(void) { + for (size_t i = 0; i < VGA_HEIGHT-1; i++) { + for (size_t j = 0; j < VGA_WIDTH; j++) + framebuffer[i * VGA_WIDTH + j] = VGA_MEMORY[(i+1) * VGA_WIDTH + j]; + } +} + +void fb_init(void) { + fb_row = 0; + fb_column = 0; + fb_color = vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK); + framebuffer = VGA_MEMORY; + for (size_t y = 0; y < VGA_HEIGHT; y++) { + for (size_t x = 0; x < VGA_WIDTH; x++) + _fb_putentryat(' ', fb_color, x, y); + } + _enable_cursor(0, 0); + _update_cursor(0, 0); +} + +void fb_setcolor(uint8_t color) { + fb_color = color; +} + +void fb_setpos(int x, int y) { + fb_row = y; + fb_column = x; + _update_cursor(fb_column, fb_row+1); +} + +void fb_offsetpos(int dx, int dy) { + fb_row += dy; + fb_column += dx; + _update_cursor(fb_column, fb_row+1); +} + +void fb_putchar(char c) { + unsigned char uc = c; + switch (uc) { + case '\r': + fb_column = 0; + break; + case '\n': + fb_column = 0; + if (++fb_row == VGA_HEIGHT) { + fb_row--; + _fb_scroll(); + } + break; + case '\t': + fb_column += 4; + if (++fb_column == VGA_WIDTH) { + fb_column = 4; + if (++fb_row == VGA_HEIGHT) { + fb_row--; + _fb_scroll(); + } + } + break; + default: + _fb_putentryat(uc, fb_color, fb_column, fb_row); + if (++fb_column == VGA_WIDTH) { + fb_column = 0; + if (++fb_row == VGA_HEIGHT) { + fb_row--; + _fb_scroll(); + } + } + break; + } + _update_cursor(fb_column, fb_row+1); +} |