--- /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);
+
+ 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