/* $NetBSD: kbd.c,v 1.7 1996/03/17 01:26:51 thorpej Exp $ */ /* * Copyright (c) 1995 Leo Weppelman * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mouse.h" /* * The ringbuffer is the interface between the hard and soft interrupt handler. * The hard interrupt runs straight from the MFP interrupt. */ #define KBD_RING_SIZE 256 /* Sz of input ring buffer, must be power of 2 */ #define KBD_RING_MASK 255 /* Modulo mask for above */ static u_char kbd_ring[KBD_RING_SIZE]; static volatile u_int kbd_rbput = 0; /* 'put' index */ static u_int kbd_rbget = 0; /* 'get' index */ static u_char kbd_soft = 0; /* 1: Softint has been scheduled*/ struct kbd_softc { int k_event_mode; /* if 1, collect events, */ /* else pass to ite */ struct evvar k_events; /* event queue state */ u_char k_soft_cs; /* control-reg. copy */ u_char k_package[20]; /* XXX package being build */ u_char k_pkg_size; /* Size of the package */ u_char k_pkg_idx; u_char *k_sendp; /* Output pointer */ int k_send_cnt; /* Chars left for output */ }; static struct kbd_softc kbd_softc; /* {b,c}devsw[] function prototypes */ dev_type_open(kbdopen); dev_type_close(kbdclose); dev_type_read(kbdread); dev_type_ioctl(kbdioctl); dev_type_select(kbdselect); /* Interrupt handler */ void kbdintr __P((int)); void kbd_write __P((u_char *, int)); static void kbdsoft __P((void)); static void kbdattach __P((struct device *, struct device *, void *)); static int kbdmatch __P((struct device *, void *, void *)); static int kbd_write_poll __P((u_char *, int)); static void kbd_pkg_start __P((struct kbd_softc *, u_char)); struct cfattach kbd_ca = { sizeof(struct device), kbdmatch, kbdattach }; struct cfdriver kbd_cd = { NULL, "kbd", DV_DULL, NULL, 0 }; /*ARGSUSED*/ static int kbdmatch(pdp, match, auxp) struct device *pdp; void *match, *auxp; { if (!strcmp((char *)auxp, "kbd")) return (1); return (0); } /*ARGSUSED*/ static void kbdattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { int timeout; u_char kbd_rst[] = { 0x80, 0x01 }; u_char kbd_icmd[] = { 0x12, 0x15 }; /* * Disable keyboard interrupts from MFP */ MFP->mf_ierb &= ~IB_AINT; /* * Reset ACIA and intialize to: * divide by 16, 8 data, 1 stop, no parity, enable RX interrupts */ KBD->ac_cs = A_RESET; delay(100); /* XXX: enough? */ KBD->ac_cs = kbd_softc.k_soft_cs = KBD_INIT | A_RXINT; /* * Clear error conditions */ while (KBD->ac_cs & (A_IRQ|A_RXRDY)) timeout = KBD->ac_da; /* * Now send the reset string, and read+ignore it's response */ if (!kbd_write_poll(kbd_rst, 2)) printf("kbd: error cannot reset keyboard\n"); for (timeout = 1000; timeout > 0; timeout--) { if (KBD->ac_cs & (A_IRQ|A_RXRDY)) { timeout = KBD->ac_da; timeout = 100; } delay(100); } /* * Send init command: disable mice & joysticks */ kbd_write_poll(kbd_icmd, sizeof(kbd_icmd)); printf("\n"); } /* definitions for atari keyboard encoding. */ #define KEY_CODE(c) ((u_char)(c) & 0x7f) #define KEY_UP(c) ((u_char)(c) & 0x80) #define IS_KEY(c) ((u_char)(c) < 0xf6) void kbdenable() { int s, code; s = spltty(); /* * Clear error conditions... */ while (KBD->ac_cs & (A_IRQ|A_RXRDY)) code = KBD->ac_da; /* * Enable interrupts from MFP */ MFP->mf_iprb &= ~IB_AINT; MFP->mf_ierb |= IB_AINT; MFP->mf_imrb |= IB_AINT; kbd_softc.k_event_mode = 0; kbd_softc.k_events.ev_io = 0; kbd_softc.k_pkg_size = 0; splx(s); } int kbdopen(dev_t dev, int flags, int mode, struct proc *p) { if (kbd_softc.k_events.ev_io) return EBUSY; kbd_softc.k_events.ev_io = p; ev_init(&kbd_softc.k_events); return (0); } int kbdclose(dev_t dev, int flags, int mode, struct proc *p) { /* Turn off event mode, dump the queue */ kbd_softc.k_event_mode = 0; ev_fini(&kbd_softc.k_events); kbd_softc.k_events.ev_io = NULL; return (0); } int kbdread(dev_t dev, struct uio *uio, int flags) { return ev_read(&kbd_softc.k_events, uio, flags); } int kbdioctl(dev_t dev,u_long cmd,register caddr_t data,int flag,struct proc *p) { register struct kbd_softc *k = &kbd_softc; switch (cmd) { case KIOCTRANS: if (*(int *)data == TR_UNTRANS_EVENT) return 0; break; case KIOCGTRANS: /* * Get translation mode */ *(int *)data = TR_UNTRANS_EVENT; return 0; case KIOCSDIRECT: k->k_event_mode = *(int *)data; return 0; case FIONBIO: /* we will remove this someday (soon???) */ return 0; case FIOASYNC: k->k_events.ev_async = *(int *)data != 0; return 0; case TIOCSPGRP: if (*(int *)data != k->k_events.ev_io->p_pgid) return EPERM; return 0; default: return ENOTTY; } /* * We identified the ioctl, but we do not handle it. */ return EOPNOTSUPP; /* misuse, but what the heck */ } int kbdselect (dev_t dev, int rw, struct proc *p) { return ev_select (&kbd_softc.k_events, rw, p); } /* * Keyboard interrupt handler called straight from MFP at spl6. */ void kbdintr(sr) int sr; /* sr at time of interrupt */ { int code; int got_char = 0; /* * There may be multiple keys available. Read them all. */ while (KBD->ac_cs & (A_RXRDY|A_OE|A_PE)) { got_char = 1; if (KBD->ac_cs & (A_OE|A_PE)) { code = KBD->ac_da; /* Silently ignore errors */ continue; } kbd_ring[kbd_rbput++ & KBD_RING_MASK] = KBD->ac_da; } /* * If characters are waiting for transmit, send them. */ if ((kbd_softc.k_soft_cs & A_TXINT) && (KBD->ac_cs & A_TXRDY)) { if (kbd_softc.k_sendp != NULL) KBD->ac_da = *kbd_softc.k_sendp++; if (--kbd_softc.k_send_cnt <= 0) { /* * The total package has been transmitted, * wakeup anyone waiting for it. */ KBD->ac_cs = (kbd_softc.k_soft_cs &= ~A_TXINT); kbd_softc.k_sendp = NULL; kbd_softc.k_send_cnt = 0; wakeup((caddr_t)&kbd_softc.k_send_cnt); } } /* * Activate software-level to handle possible input. */ if (got_char) { if (!BASEPRI(sr)) { if (!kbd_soft++) add_sicallback(kbdsoft, 0, 0); } else { spl1(); kbdsoft(); } } } /* * Keyboard soft interrupt handler */ void kbdsoft() { int s; u_char code; struct kbd_softc *k = &kbd_softc; struct firm_event *fe; int put; int n, get; kbd_soft = 0; get = kbd_rbget; for (;;) { n = kbd_rbput; if (get == n) /* We're done */ break; n -= get; if (n > KBD_RING_SIZE) { /* Ring buffer overflow */ get += n - KBD_RING_SIZE; n = KBD_RING_SIZE; } while (--n >= 0) { code = kbd_ring[get++ & KBD_RING_MASK]; /* * If collecting a package, stuff it in and * continue. */ if (k->k_pkg_size && (k->k_pkg_idx < k->k_pkg_size)) { k->k_package[k->k_pkg_idx++] = code; if (k->k_pkg_idx == k->k_pkg_size) { k->k_pkg_size = 0; #if NMOUSE > 0 /* * Package is complete, we can now * send it to the mouse driver... */ mouse_soft(k->k_package, k->k_pkg_size); #endif /* NMOUSE */ } continue; } /* * If this is a package header, init pkg. handling. */ if (!IS_KEY(code)) { kbd_pkg_start(k, code); continue; } /* * if not in event mode, deliver straight to ite to * process key stroke */ if (!k->k_event_mode) { /* Gets to spltty() by itself */ ite_filter(code, ITEFILT_TTY); continue; } /* * Keyboard is generating events. Turn this keystroke * into an event and put it in the queue. If the queue * is full, the keystroke is lost (sorry!). */ s = spltty(); put = k->k_events.ev_put; fe = &k->k_events.ev_q[put]; put = (put + 1) % EV_QSIZE; if (put == k->k_events.ev_get) { log(LOG_WARNING, "keyboard event queue overflow\n"); splx(s); continue; } fe->id = KEY_CODE(code); fe->value = KEY_UP(code) ? VKEY_UP : VKEY_DOWN; fe->time = time; k->k_events.ev_put = put; EV_WAKEUP(&k->k_events); splx(s); } kbd_rbget = get; } } static char sound[] = { 0xA8,0x01,0xA9,0x01,0xAA,0x01,0x00, 0xF8,0x10,0x10,0x10,0x00,0x20,0x03 }; void kbdbell() { register int i, sps; sps = spltty(); for (i = 0; i < sizeof(sound); i++) { SOUND->sd_selr = i; SOUND->sd_wdat = sound[i]; } splx(sps); } int kbdgetcn() { u_char code; int s = spltty(); int ints_active; ints_active = 0; if (MFP->mf_imrb & IB_AINT) { ints_active = 1; MFP->mf_imrb &= ~IB_AINT; } for (;;) { while (!((KBD->ac_cs & (A_IRQ|A_RXRDY)) == (A_IRQ|A_RXRDY))) ; /* Wait for key */ if (KBD->ac_cs & (A_OE|A_PE)) { code = KBD->ac_da; /* Silently ignore errors */ continue; } break; } code = KBD->ac_da; if (ints_active) { MFP->mf_iprb &= ~IB_AINT; MFP->mf_imrb |= IB_AINT; } splx (s); return code; } /* * Write a command to the keyboard in 'polled' mode. */ static int kbd_write_poll(cmd, len) u_char *cmd; int len; { int timeout; while (len-- > 0) { KBD->ac_da = *cmd++; for (timeout = 100; !(KBD->ac_cs & A_TXRDY); timeout--) delay(10); if (!(KBD->ac_cs & A_TXRDY)) return (0); } return (1); } /* * Write a command to the keyboard. Return when command is send. */ void kbd_write(cmd, len) u_char *cmd; int len; { struct kbd_softc *k = &kbd_softc; int sps; /* * Get to splhigh, 'real' interrupts arrive at spl6! */ sps = splhigh(); /* * Make sure any privious write has ended... */ while (k->k_sendp != NULL) tsleep((caddr_t)&k->k_sendp, TTOPRI, "kbd_write1", 0); /* * If the KBD-acia is not currently busy, send the first * character now. */ KBD->ac_cs = (k->k_soft_cs |= A_TXINT); if (KBD->ac_cs & A_TXRDY) { KBD->ac_da = *cmd++; len--; } /* * If we're not yet done, wait until all characters are send. */ if (len > 0) { k->k_sendp = cmd; k->k_send_cnt = len; tsleep((caddr_t)&k->k_send_cnt, TTOPRI, "kbd_write2", 0); } splx(sps); /* * Wakeup all procs waiting for us. */ wakeup((caddr_t)&k->k_sendp); } /* * Setup softc-fields to assemble a keyboard package. */ static void kbd_pkg_start(kp, msg_start) struct kbd_softc *kp; u_char msg_start; { kp->k_pkg_idx = 1; kp->k_package[0] = msg_start; switch (msg_start) { case 0xf6: kp->k_pkg_size = 8; break; case 0xf7: kp->k_pkg_size = 6; break; case 0xf8: case 0xf9: case 0xfa: case 0xfb: kp->k_pkg_size = 3; break; case 0xfc: kp->k_pkg_size = 7; break; case 0xfe: case 0xff: kp->k_pkg_size = 2; break; default: printf("kbd: Unknown packet 0x%x\n", msg_start); break; } }