kernel: initial keyboard abstraction

kernel-src/include/kernel/keyboard.h

@@ -0,0 +1,141 @@
+#ifndef _KEYBOARD_H
+#define _KEYBOARD_H
+
+#define KBPACKET_FLAGS_RELEASED 1
+#define KBPACKET_FLAGS_LEFTCTRL 2
+#define KBPACKET_FLAGS_CAPSLOCK 4
+#define KBPACKET_FLAGS_LEFTALT 8
+#define KBPACKET_FLAGS_RIGHTALT 16
+#define KBPACKET_FLAGS_LEFTSHIFT 32
+#define KBPACKET_FLAGS_RIGHTCTRL 64
+#define KBPACKET_FLAGS_RIGHTSHIFT 128
+
+#define KEYCODE_RESERVED 0
+#define KEYCODE_ESCAPE 1
+#define KEYCODE_1 2
+#define KEYCODE_2 3
+#define KEYCODE_3 4
+#define KEYCODE_4 5
+#define KEYCODE_5 6
+#define KEYCODE_6 7
+#define KEYCODE_7 8
+#define KEYCODE_8 9
+#define KEYCODE_9 10
+#define KEYCODE_0 11
+#define KEYCODE_MINUS 12
+#define KEYCODE_EQUAL 13
+#define KEYCODE_BACKSPACE 14
+#define KEYCODE_TAB 15
+#define KEYCODE_Q 16
+#define KEYCODE_W 17
+#define KEYCODE_E 18
+#define KEYCODE_R 19
+#define KEYCODE_T 20
+#define KEYCODE_Y 21
+#define KEYCODE_U 22
+#define KEYCODE_I 23
+#define KEYCODE_O 24
+#define KEYCODE_P 25
+#define KEYCODE_LEFTBRACE 26
+#define KEYCODE_RIGHTBRACE 27
+#define KEYCODE_ENTER 28 
+#define KEYCODE_LEFTCTRL 29
+#define KEYCODE_A 30
+#define KEYCODE_S 31
+#define KEYCODE_D 32
+#define KEYCODE_F 33
+#define KEYCODE_G 34
+#define KEYCODE_H 35
+#define KEYCODE_J 36
+#define KEYCODE_K 37
+#define KEYCODE_L 38
+#define KEYCODE_SEMICOLON 39
+#define KEYCODE_APOSTROPHE 40
+#define KEYCODE_GRAVE 41
+#define KEYCODE_LEFTSHIFT 42
+#define KEYCODE_BACKSLASH 43
+#define KEYCODE_Z 44
+#define KEYCODE_X 45
+#define KEYCODE_C 46
+#define KEYCODE_V 47
+#define KEYCODE_B 48
+#define KEYCODE_N 49
+#define KEYCODE_M 50
+#define KEYCODE_COMMA 51
+#define KEYCODE_DOT 52
+#define KEYCODE_SLASH 53
+#define KEYCODE_RIGHTSHIFT 54
+#define KEYCODE_KEYPADASTERISK 55
+#define KEYCODE_LEFTALT 56
+#define KEYCODE_SPACE 57
+#define KEYCODE_CAPSLOCK 58
+#define KEYCODE_F1 59
+#define KEYCODE_F2 60
+#define KEYCODE_F3 61
+#define KEYCODE_F4 62
+#define KEYCODE_F5 63
+#define KEYCODE_F6 64
+#define KEYCODE_F7 65
+#define KEYCODE_F8 66
+#define KEYCODE_F9 67
+#define KEYCODE_F10 68
+#define KEYCODE_NUMLOCK 69
+#define KEYCODE_SCROLLLOCK 70
+#define KEYCODE_KEYPAD7 71
+#define KEYCODE_KEYPAD8 72
+#define KEYCODE_KEYPAD9 73
+#define KEYCODE_KEYPADMINUS 74
+#define KEYCODE_KEYPAD4 75
+#define KEYCODE_KEYPAD5 76
+#define KEYCODE_KEYPAD6 77
+#define KEYCODE_KEYPADPLUS 78
+#define KEYCODE_KEYPAD1 79
+#define KEYCODE_KEYPAD2 80
+#define KEYCODE_KEYPAD3 81
+#define KEYCODE_KEYPAD0 82
+#define KEYCODE_KEYPADDOT 83
+#define KEYCODE_F11 87
+#define KEYCODE_F12 88
+#define KEYCODE_KEYPADENTER 96
+#define KEYCODE_RIGHTCTRL 97
+#define KEYCODE_KEYPADSLASH 98
+#define KEYCODE_SYSREQ 99
+#define KEYCODE_RIGHTALT 100
+#define KEYCODE_LINEFEED  101
+#define KEYCODE_HOME 102
+#define KEYCODE_UP 103
+#define KEYCODE_PAGEUP 104
+#define KEYCODE_LEFT 105
+#define KEYCODE_RIGHT 106
+#define KEYCODE_END 107
+#define KEYCODE_DOWN 108
+#define KEYCODE_PAGEDOWN 109
+#define KEYCODE_INSERT 110
+#define KEYCODE_DELETE 111
+
+#include <semaphore.h>
+#include <ringbuffer.h>
+
+typedef uintmax_t keycode_t;
+
+typedef struct {
+	ringbuffer_t packetbuffer;
+	semaphore_t semaphore;
+	int flags;
+} keyboard_t;
+
+typedef struct {
+	char ascii;
+	keycode_t keycode;
+	int flags;
+} kbpacket_t;
+
+extern keyboard_t *keyboard_console;
+
+void keyboard_init();
+keyboard_t *keyboard_new();
+void keyboard_send(keyboard_t *keyboard, kbpacket_t *packet);
+bool keyboard_get(keyboard_t *keyboard, kbpacket_t *packet);
+int keyboard_wait(keyboard_t *keyboard, kbpacket_t *packet);
+
+#endif

kernel-src/io/keyboard.c

@@ -0,0 +1,87 @@
+#include <kernel/keyboard.h>
+#include <kernel/alloc.h>
+#include <logging.h>
+#include <errno.h>
+#include <kernel/devfs.h>
+#include <hashtable.h>
+
+#define BUFFER_PACKET_CAPACITY 100
+#define BUFFER_SIZE (BUFFER_PACKET_CAPACITY * sizeof(kbpacket_t))
+
+static int currentkbnum;
+keyboard_t *keyboard_console;
+
+static keyboard_t *newkb() {
+	keyboard_t *kb = alloc(sizeof(keyboard_t));
+	if (kb == NULL)
+		return NULL;
+
+	if (ringbuffer_init(&kb->packetbuffer, BUFFER_SIZE)) {
+		free(kb);
+		return NULL;
+	}
+
+	SEMAPHORE_INIT(&kb->semaphore, 0);
+	return kb;
+}
+
+static void destroykb(keyboard_t *kb) {
+	ringbuffer_destroy(&kb->packetbuffer);
+	free(kb);
+}
+
+void keyboard_sendpacket(keyboard_t *kb, kbpacket_t *packet) {
+	interrupt_raiseipl(IPL_KEYBOARD);
+
+	if (ringbuffer_write(&kb->packetbuffer, packet, sizeof(kbpacket_t)) != 0)
+		semaphore_signal(&kb->semaphore);
+
+	if (ringbuffer_write(&keyboard_console->packetbuffer, packet, sizeof(kbpacket_t)) != 0)
+		semaphore_signal(&keyboard_console->semaphore);
+
+	interrupt_loweripl(IPL_KEYBOARD);
+}
+
+int keyboard_wait(keyboard_t *kb, kbpacket_t *packet) {
+	int e = semaphore_wait(&kb->semaphore, true);
+	if (e == EINTR)
+		return e;
+	interrupt_raiseipl(IPL_KEYBOARD);
+
+	__assert(ringbuffer_read(&kb->packetbuffer, packet, sizeof(kbpacket_t)) == sizeof(kbpacket_t));
+
+	interrupt_loweripl(IPL_KEYBOARD);
+	return 0;
+}
+
+bool keyboard_get(keyboard_t *kb, kbpacket_t *packet) {
+	interrupt_raiseipl(IPL_KEYBOARD);
+
+	bool ok = ringbuffer_read(&kb->packetbuffer, packet, sizeof(kbpacket_t)) == sizeof(kbpacket_t);
+
+	interrupt_loweripl(IPL_KEYBOARD);
+	return ok;
+}
+
+static hashtable_t kbtable;
+
+keyboard_t *keyboard_new() {
+	keyboard_t *kb = newkb();
+	if (kb == NULL)
+		return NULL;
+
+	if (hashtable_set(&kbtable, kb, &currentkbnum, sizeof(currentkbnum), true)) {
+		destroykb(kb);
+		return NULL;
+	}
+
+	// TODO keyboard device
+	++currentkbnum;
+	return kb;
+}
+
+void keyboard_init() {
+	keyboard_console = newkb();
+	__assert(keyboard_console);
+	__assert(hashtable_init(&kbtable, 20) == 0);
+}