97 lines
1.8 KiB
C
97 lines
1.8 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* Mouse driver
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*/
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#include <system.h>
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#include <logging.h>
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#include <pipe.h>
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#include <mouse.h>
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uint8_t mouse_cycle = 0;
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int8_t mouse_byte[3];
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fs_node_t * mouse_pipe;
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void mouse_handler(struct regs *r) {
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switch (mouse_cycle) {
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case 0:
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mouse_byte[0] = inportb(0x60);
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++mouse_cycle;
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break;
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case 1:
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mouse_byte[1] = inportb(0x60);
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++mouse_cycle;
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break;
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case 2:
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mouse_byte[2] = inportb(0x60);
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mouse_device_packet_t packet;
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packet.magic = MOUSE_MAGIC;
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packet.x_difference = mouse_byte[1];
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packet.y_difference = mouse_byte[2];
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packet.buttons = 0;
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if (mouse_byte[0] & 0x01) {
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packet.buttons |= LEFT_CLICK;
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}
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if (mouse_byte[0] & 0x02) {
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packet.buttons |= RIGHT_CLICK;
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}
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mouse_cycle = 0;
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write_fs(mouse_pipe, 0, sizeof(packet), (uint8_t *)&packet);
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break;
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}
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}
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void mouse_wait(uint8_t a_type) {
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uint32_t timeout = 100000;
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if (!a_type) {
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while (--timeout) {
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if ((inportb(0x64) & 0x01) == 1) {
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return;
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}
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}
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return;
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} else {
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while (--timeout) {
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if (!((inportb(0x64) & 0x02))) {
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return;
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}
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}
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return;
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}
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}
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void mouse_write(uint8_t write) {
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mouse_wait(1);
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outportb(0x64, 0xD4);
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mouse_wait(1);
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outportb(0x60, write);
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}
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uint8_t mouse_read() {
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mouse_wait(0);
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char t = inportb(0x60);
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return t;
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}
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void mouse_install() {
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LOG(INFO, "Initializing mouse cursor driver");
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uint8_t status;
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IRQ_OFF;
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mouse_pipe = make_pipe(sizeof(mouse_device_packet_t) * 40);
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mouse_wait(1);
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outportb(0x64,0xA8);
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mouse_wait(1);
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outportb(0x64,0x20);
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mouse_wait(0);
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status = inportb(0x60) | 2;
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mouse_wait(1);
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outportb(0x64, 0x60);
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mouse_wait(1);
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outportb(0x60, status);
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mouse_write(0xF6);
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mouse_read();
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mouse_write(0xF4);
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mouse_read();
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IRQ_RES;
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irq_install_handler(12, mouse_handler);
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}
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