+++ /dev/null
-/*
-pcboot - bootable PC demo/game kernel
-Copyright (C) 2018 John Tsiombikas <nuclear@member.fsf.org>
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY, without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <https://www.gnu.org/licenses/>.
-*/
-#include <stdio.h>
-#include "psaux.h"
-#include "intr.h"
-#include "asmops.h"
-#include "keyb.h"
-#include "kbregs.h"
-
-static void init_mouse(void);
-static void proc_mouse_data(unsigned char *data);
-static void psaux_intr();
-
-static int mx, my;
-static unsigned int bnstate;
-static int present;
-static int bounds[4];
-static int intr_mode;
-
-void init_psaux(void)
-{
- interrupt(IRQ_TO_INTR(12), psaux_intr);
- unmask_irq(12);
-
- init_mouse();
- set_mouse_bounds(0, 0, 319, 199);
-}
-
-static void init_mouse(void)
-{
- unsigned char val;
-
- kb_send_cmd(KB_CMD_AUX_ENABLE);
- if(kb_wait_read()) {
- val = kb_read_data();
- printf("aux enable: %02x\n", (unsigned int)val);
- }
-
- /*
- kb_send_cmd(KB_CMD_PSAUX);
- kb_send_data(AUX_CMD_REMOTE_MODE);
- val = kb_read_data();
- */
-
- kb_send_cmd(KB_CMD_GET_CMDBYTE);
- val = kb_read_data();
- val &= ~KB_CCB_AUX_DISABLE;
- val |= KB_CCB_AUX_INTREN;
- kb_send_cmd(KB_CMD_SET_CMDBYTE);
- kb_send_data(val);
-
- if(kb_wait_read()) {
- val = kb_read_data();
- printf("set cmdbyte: %02x\n", (unsigned int)val);
- }
- intr_mode = 1;
-
- kb_send_cmd(KB_CMD_PSAUX);
- kb_send_data(AUX_CMD_DEFAULTS);
- val = kb_read_data();
-
- kb_send_cmd(KB_CMD_PSAUX);
- kb_send_data(AUX_CMD_ENABLE);
- val = kb_read_data();
-
- present = (val == KB_ACK) ? 1 : 0;
- printf("init_mouse: %spresent\n", present ? "" : "not ");
-}
-
-int have_mouse(void)
-{
- return present;
-}
-
-void set_mouse_bounds(int x0, int y0, int x1, int y1)
-{
- bounds[0] = x0;
- bounds[1] = y0;
- bounds[2] = x1;
- bounds[3] = y1;
-}
-
-unsigned int mouse_state(int *xp, int *yp)
-{
- if(!intr_mode) {
- poll_mouse();
- }
-
- *xp = mx;
- *yp = my;
- return bnstate;
-}
-
-/* TODO: poll_mouse doesn't work (enable remote mode and disable interrupt on init to test) */
-#define STAT_AUX_PENDING (KB_STAT_OUTBUF_FULL | KB_STAT_AUX)
-static inline int aux_pending(void)
-{
- return (inp(KB_STATUS_PORT) & STAT_AUX_PENDING) == STAT_AUX_PENDING ? 1 : 0;
-}
-
-void poll_mouse(void)
-{
- static int poll_state;
- static unsigned char pkt[3];
- unsigned char rd;
-
- ser_printf("poll_mouse(%d)\n", poll_state);
-
- switch(poll_state) {
- case 0: /* send read mouse command */
- kb_send_cmd(KB_CMD_PSAUX);
- kb_send_data(AUX_CMD_READ_MOUSE);
- ++poll_state;
- break;
-
- case 1: /* wait for ACK */
- if(kb_wait_read()) {// && aux_pending()) {
- if((rd = kb_read_data()) == KB_ACK) {
- ++poll_state;
- } else {
- ser_printf("poll_mouse state 1: expected ack: %02x\n", (unsigned int)rd);
- }
- }
- break;
-
- case 2: /* read packet data */
- case 3:
- case 4:
- if(kb_wait_read() && aux_pending()) {
- int i = poll_state++ - 2;
- pkt[i] = kb_read_data();
- }
- if(poll_state == 5) {
- ser_printf("proc_mouse_data(%02x %02x %02x)\n", (unsigned int)pkt[0],
- (unsigned int)pkt[1], (unsigned int)pkt[2]);
- proc_mouse_data(pkt);
- poll_state = 0;
- }
- break;
-
- default:
- ser_printf("poll_mouse reached state: %d\n", poll_state);
- }
-}
-
-static void proc_mouse_data(unsigned char *data)
-{
- int dx, dy;
-
- if(data[0] & AUX_PKT0_OVF_BITS) {
- /* consensus seems to be that if overflow bits are set, something is
- * fucked, and it's best to re-initialize the mouse
- */
- /*init_mouse();*/
- } else {
- bnstate = data[0] & AUX_PKT0_BUTTON_BITS;
- dx = data[1];
- dy = data[2];
-
- if(data[0] & AUX_PKT0_XSIGN) {
- dx |= 0xffffff00;
- }
- if(data[0] & AUX_PKT0_YSIGN) {
- dy |= 0xffffff00;
- }
-
- mx += dx;
- my -= dy;
-
- if(mx < bounds[0]) mx = bounds[0];
- if(mx > bounds[2]) mx = bounds[2];
- if(my < bounds[1]) my = bounds[1];
- if(my > bounds[3]) my = bounds[3];
- }
-}
-
-static void psaux_intr()
-{
- static unsigned char data[3];
- static int idx;
-
- if(!(inp(KB_STATUS_PORT) & KB_STAT_AUX)) {
- /* no mouse data pending, ignore interrupt */
- return;
- }
-
- data[idx] = kb_read_data();
- if(++idx >= 3) {
- idx = 0;
-
- proc_mouse_data(data);
- }
-}
projects / com32 / blobdiff