+++ /dev/null
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <dos.h>
-#include <conio.h>
-
-#ifdef __WATCOMC__
-#include <i86.h>
-#endif
-
-#ifdef __DJGPP__
-#include <stdint.h>
-#include <dpmi.h>
-#include <go32.h>
-#include <pc.h>
-#endif
-
-#include "sball.h"
-
-struct motion {
- int x, y, z;
- int rx, ry, rz;
-};
-
-#define UART1_BASE 0x3f8
-#define UART2_BASE 0x2f8
-#define UART1_IRQ 4
-#define UART2_IRQ 3
-
-#define UART_DATA 0
-#define UART_INTR 1
-#define UART_DIVLO 0
-#define UART_DIVHI 1
-#define UART_FIFO 2
-#define UART_IID 2
-#define UART_LCTL 3
-#define UART_MCTL 4
-#define UART_LSTAT 5
-#define UART_MSTAT 6
-
-/* interrupt enable register bits */
-#define INTR_RECV 1
-#define INTR_SEND 2
-#define INTR_LSTAT 4
-#define INTR_DELTA 8
-
-/* fifo control register bits */
-#define FIFO_ENABLE 0x01
-#define FIFO_RECV_CLEAR 0x02
-#define FIFO_SEND_CLEAR 0x04
-#define FIFO_DMA 0x08
-#define FIFO_TRIG_4 0x40
-#define FIFO_TRIG_8 0x80
-#define FIFO_TRIG_14 0xc0
-
-/* interrupt id register bits */
-#define IID_PENDING 0x01
-#define IID_ID0 0x02
-#define IID_ID1 0x04
-#define IID_ID2 0x08
-#define IID_FIFO_EN 0xc0
-
-#define IID_SOURCE 0xe
-
-#define IID_DELTA 0
-#define IID_SEND 0x2
-#define IID_RECV 0x4
-#define IID_FIFO 0xc
-#define IID_STATUS 0x6
-
-/* line control register bits */
-#define LCTL_BITS_8 0x03
-#define LCTL_STOP_2 0x04
-#define LCTL_DLAB 0x80
-#define LCTL_8N1 LCTL_BITS_8
-#define LCTL_8N2 (LCTL_BITS_8 | LCTL_STOP_2)
-
-/* modem control register bits */
-#define MCTL_DTR 0x01
-#define MCTL_RTS 0x02
-#define MCTL_OUT1 0x04
-#define MCTL_OUT2 0x08
-#define MCTL_LOOP 0x10
-
-/* line status register bits */
-#define LST_DRDY 0x01
-#define LST_ERR_OVER 0x02
-#define LST_ERR_PARITY 0x04
-#define LST_ERR_FRAME 0x08
-#define LST_ERR_BRK 0x10
-#define LST_TREG_EMPTY 0x20
-#define LST_TIDLE 0x40
-#define LST_ERROR 0x80
-
-/* modem status register bits */
-#define MST_DELTA_CTS 0x01
-#define MST_DELTA_DSR 0x02
-#define MST_TERI 0x04
-#define MST_DELTA_DCD 0x08
-#define MST_CTS 0x10
-#define MST_DSR 0x20
-#define MST_RING 0x40
-#define MST_DCD 0x80
-
-/* interrupt controller stuff */
-#define PIC1_CMD_PORT 0x20
-#define PIC1_DATA_PORT 0x21
-#define PIC2_CMD_PORT 0xa0
-#define PIC2_DATA_PORT 0xa1
-#define OCW2_EOI 0x20
-
-struct packet {
- int id;
- char data[80];
-};
-
-static int init_smouse(void);
-static void read_motion(int *m, const char *s);
-static void read_keystate(unsigned int *stptr, const char *s);
-static void procpkt(struct packet *p);
-static void enqueue_event(sball_event *ev);
-
-#define COM_FMT_8N1 LCTL_8N1
-#define COM_FMT_8N2 LCTL_8N2
-static void com_setup(int port, int baud, unsigned int fmt);
-static void com_close(void);
-
-static void com_putc(char c);
-static void com_puts(const char *s);
-static int com_getc(void);
-static char *com_gets(char *buf, int sz);
-
-static int com_have_recv(void);
-static int com_can_send(void);
-
-#ifdef __WATCOMC__
-#define INTERRUPT __interrupt __far
-static void (INTERRUPT *prev_recv_intr)(void);
-#endif
-
-#ifdef __DJGPP__
-#define INTERRUPT
-
-static _go32_dpmi_seginfo intr, prev_intr;
-
-#define outp(port, val) outportb(port, val)
-#define inp(port) inportb(port)
-#endif
-
-static void INTERRUPT recv_intr(void);
-
-static int uart_base, uart_intr_num;
-
-static struct packet pktbuf[16];
-static int pktbuf_ridx, pktbuf_widx;
-#define BNEXT(x) (((x) + 1) & 0xf)
-#define BEMPTY(b) (b##_ridx == b##_widx)
-
-static sball_event evbuf[16];
-static int evbuf_ridx, evbuf_widx;
-
-
-int sball_init(void)
-{
- com_setup(0, 9600, COM_FMT_8N2);
- init_smouse();
- return 0;
-}
-
-void sball_shutdown(void)
-{
- com_close();
-}
-
-int sball_getdev(void)
-{
- return 0;
-}
-
-int sball_pending(void)
-{
- _disable();
- while(!BEMPTY(pktbuf)) {
- procpkt(pktbuf + pktbuf_ridx);
- pktbuf_ridx = BNEXT(pktbuf_ridx);
- }
- _enable();
- return !BEMPTY(evbuf);
-}
-
-int sball_getevent(sball_event *ev)
-{
- _disable();
- while(!BEMPTY(pktbuf)) {
- procpkt(pktbuf + pktbuf_ridx);
- pktbuf_ridx = BNEXT(pktbuf_ridx);
- }
- _enable();
-
- if(BEMPTY(evbuf)) {
- return 0;
- }
- *ev = evbuf[evbuf_ridx];
- evbuf_ridx = BNEXT(evbuf_ridx);
- return 1;
-}
-
-static int init_smouse(void)
-{
- /* try repeatedly zeroing the device until we get a response */
- do {
- delay(500);
- com_puts("z\r");
- } while(BEMPTY(pktbuf));
-
- /* then ask for id string and request motion updates */
- com_puts("vQ\r");
- com_puts("m3\r");
- return 0;
-}
-
-static void procpkt(struct packet *p)
-{
- static unsigned int bnstate;
- int i;
- unsigned int st, delta, prev;
- sball_event *ev;
-
- switch(p->id) {
- case 'd':
- ev = evbuf + evbuf_widx;
- read_motion(ev->motion.motion, p->data);
- ev->type = SBALL_EV_MOTION;
- enqueue_event(ev);
- break;
-
- case 'k':
- read_keystate(&st, p->data);
-
- delta = st ^ bnstate;
- prev = bnstate;
- bnstate = st;
-
- for(i=0; i<32; i++) {
- if(delta & 1) {
- ev = evbuf + evbuf_widx;
- ev->type = SBALL_EV_BUTTON;
- ev->button.id = i;
- ev->button.pressed = st & 1;
- ev->button.state = prev ^ (1 << i);
- enqueue_event(ev);
- }
- st >>= 1;
- delta >>= 1;
- }
- break;
-
- case 'v':
- printf("Device: %s\n", p->data);
- break;
- /*
- default:
- printf("DBG %c -> %s\n", (char)p->id, p->data);
- */
- }
-}
-
-static void enqueue_event(sball_event *ev)
-{
- if(ev != evbuf + evbuf_widx) {
- evbuf[evbuf_widx] = *ev;
- }
-
- evbuf_widx = BNEXT(evbuf_widx);
- if(evbuf_widx == evbuf_ridx) {
- fprintf(stderr, "enqueue_event: overflow, dropping oldest\n");
- evbuf_ridx = BNEXT(evbuf_ridx);
- }
-}
-
-static void com_setup(int port, int baud, unsigned int fmt)
-{
- unsigned char ctl;
- unsigned short div = 115200 / baud;
- static int base[] = {UART1_BASE, UART2_BASE};
- static int irq[] = {UART1_IRQ, UART2_IRQ};
-
- uart_base = base[port];
- uart_intr_num = irq[port] | 8;
-
- _disable();
-#ifdef __WATCOMC__
- prev_recv_intr = _dos_getvect(uart_intr_num);
- _dos_setvect(uart_intr_num, recv_intr);
-#endif
-#ifdef __DJGPP__
- _go32_dpmi_get_protected_mode_interrupt_vector(uart_intr_num, &prev_intr);
- intr.pm_offset = (intptr_t)recv_intr;
- intr.pm_selector = _go32_my_cs();
- _go32_dpmi_allocate_iret_wrapper(&intr);
- _go32_dpmi_set_protected_mode_interrupt_vector(uart_intr_num, &intr);
-#endif
- /* unmask the appropriate interrupt */
- outp(PIC1_DATA_PORT, inp(PIC1_DATA_PORT) & ~(1 << irq[port]));
-
- outp(uart_base + UART_LCTL, LCTL_DLAB);
- outp(uart_base + UART_DIVLO, div & 0xff);
- outp(uart_base + UART_DIVHI, (div >> 8) & 0xff);
- outp(uart_base + UART_LCTL, fmt); /* fmt should be LCTL_8N1, LCTL_8N2 etc */
- outp(uart_base + UART_FIFO, FIFO_ENABLE | FIFO_SEND_CLEAR | FIFO_RECV_CLEAR);
- outp(uart_base + UART_MCTL, MCTL_DTR | MCTL_RTS | MCTL_OUT2);
- outp(uart_base + UART_INTR, INTR_RECV);
-
- _enable();
-}
-
-static void com_close(void)
-{
- _disable();
- outp(uart_base + UART_INTR, 0);
- outp(uart_base + UART_MCTL, 0);
-#ifdef __WATCOMC__
- _dos_setvect(uart_intr_num, prev_recv_intr);
-#endif
-#ifdef __DJGPP__
- _go32_dpmi_set_protected_mode_interrupt_vector(uart_intr_num, &prev_intr);
- _go32_dpmi_free_iret_wrapper(&intr);
-#endif
- _enable();
-}
-
-static void com_putc(char c)
-{
- while(!com_can_send());
- while((inp(uart_base + UART_MSTAT) & MST_CTS) == 0);
- outp(uart_base + UART_DATA, c);
-}
-
-static void com_puts(const char *s)
-{
- while(*s) {
- com_putc(*s++);
- }
-}
-
-static int com_getc(void)
-{
- int have;
- while(!(have = com_have_recv()));
- return inp(uart_base + UART_DATA);
-}
-
-static char *com_gets(char *buf, int sz)
-{
- int c;
- char *ptr = buf;
-
- while(sz-- > 1 && (c = com_getc()) != -1) {
- if(c == '\r') {
- *ptr++ = '\n';
- break;
- }
- *ptr++ = c;
- }
- if(c == -1) {
- return 0;
- }
- *ptr = 0;
- return buf;
-}
-
-static int com_have_recv(void)
-{
- unsigned short stat = inp(uart_base + UART_LSTAT);
- if(stat & LST_ERROR) {
- fprintf(stderr, "receive error\n");
- abort();
- }
- return stat & LST_DRDY;
-}
-
-static int com_can_send(void)
-{
- return inp(uart_base + UART_LSTAT) & LST_TREG_EMPTY;
-}
-
-static void INTERRUPT recv_intr()
-{
- static char buf[128];
- static char *bptr = buf;
- struct packet *pkt;
- int idreg, c, datasz;
-
- while(((idreg = inp(uart_base + UART_IID)) & IID_PENDING) == 0) {
- while(com_have_recv()) {
- if((c = inp(uart_base + UART_DATA)) == '\r') {
- *bptr = 0;
- datasz = bptr - buf;
- bptr = buf;
-
- pkt = pktbuf + pktbuf_widx;
- pktbuf_widx = BNEXT(pktbuf_widx);
-
- if(pktbuf_widx == pktbuf_ridx) {
- /* we overflowed, drop the oldest packet */
- pktbuf_ridx = BNEXT(pktbuf_ridx);
- }
-
- if(datasz > sizeof pkt->data) {
- datasz = sizeof pkt->data; /* truncate */
- }
- pkt->id = buf[0];
- memcpy(pkt->data, buf + 1, datasz);
-
- } else if(bptr - buf < sizeof buf - 1) {
- *bptr++ = c;
- }
- }
- }
-
- outp(PIC1_CMD_PORT, OCW2_EOI);
-}
-
-static void read_motion(int *m, const char *s)
-{
- int i;
-
- for(i=0; i<6; i++) {
- long val = ((((long)s[0] & 0xf) << 12) |
- (((long)s[1] & 0xf) << 8) |
- (((long)s[2] & 0xf) << 4) |
- ((long)s[3] & 0xf)) - 32768;
- s += 4;
- *m++ = (int)val;
- }
-}
-
-static void read_keystate(unsigned int *stptr, const char *s)
-{
- int i, bit = 0;
- unsigned int st = 0;
-
- for(i=0; i<3; i++) {
- st |= ((unsigned int)*s++ & 0xf) << bit;
- bit += 4;
- }
- *stptr = st;
-}
projects / dosrtxon / blobdiff