/* $NetBSD: zskbd.c,v 1.16 2008/03/29 19:15:36 tsutsui Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * 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, Lawrence Berkeley Laboratory. * * 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. 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. * * @(#)kbd.c 8.2 (Berkeley) 10/30/93 */ /* * LK200/LK400 keyboard attached with channel A of the 2nd SCC */ #include __KERNEL_RCSID(0, "$NetBSD: zskbd.c,v 1.16 2008/03/29 19:15:36 tsutsui Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "locators.h" /* * How many input characters we can buffer. * The port-specific var.h may override this. * Note: must be a power of two! */ #define ZSKBD_RX_RING_SIZE 256 #define ZSKBD_RX_RING_MASK (ZSKBD_RX_RING_SIZE-1) /* * Output buffer. Only need a few chars. */ #define ZSKBD_TX_RING_SIZE 16 #define ZSKBD_TX_RING_MASK (ZSKBD_TX_RING_SIZE-1) #define ZSKBD_BPS 4800 struct zskbd_internal { struct zs_chanstate *zsi_cs; struct lk201_state zsi_ks; }; static struct zskbd_internal zskbd_console_internal; struct zskbd_softc { device_t zskbd_dev; /* required first: base device */ struct zskbd_internal *sc_itl; /* Flags to communicate with zskbd_softintr() */ volatile int zskbd_intr_flags; #define INTR_RX_OVERRUN 1 #define INTR_TX_EMPTY 2 #define INTR_ST_CHECK 4 /* * The receive ring buffer. */ u_int zskbd_rbget; /* ring buffer `get' index */ volatile u_int zskbd_rbput; /* ring buffer `put' index */ u_short zskbd_rbuf[ZSKBD_RX_RING_SIZE]; /* rr1, data pairs */ int sc_enabled; int kbd_type; struct device *sc_wskbddev; }; static struct zsops zsops_zskbd; static void zskbd_input(struct zskbd_softc *, int); static int zskbd_match(device_t, cfdata_t, void *); static void zskbd_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(zskbd, sizeof(struct zskbd_softc), zskbd_match, zskbd_attach, NULL, NULL); static int zskbd_enable(void *, int); static void zskbd_set_leds(void *, int); static int zskbd_ioctl(void *, u_long, void *, int, struct lwp *); static const struct wskbd_accessops zskbd_accessops = { zskbd_enable, zskbd_set_leds, zskbd_ioctl, }; static void zskbd_cngetc(void *, u_int *, int *); static void zskbd_cnpollc(void *, int); static const struct wskbd_consops zskbd_consops = { zskbd_cngetc, zskbd_cnpollc, }; static int zskbd_sendchar(void *, u_char); static const struct wskbd_mapdata zskbd_keymapdata = { lkkbd_keydesctab, #ifdef ZSKBD_LAYOUT ZSKBD_LAYOUT, #else KB_US | KB_LK401, #endif }; int zskbd_cnattach(struct zs_chanstate *); /* EXPORTED */ /* * kbd_match: how is this zs channel configured? */ static int zskbd_match(device_t parent, cfdata_t cf, void *aux) { struct zsc_attach_args *args = aux; /* Exact match is better than wildcard. */ if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel) return 2; /* This driver accepts wildcard. */ if (cf->cf_loc[ZSCCF_CHANNEL] == ZSCCF_CHANNEL_DEFAULT) return 1; return 0; } static void zskbd_attach(device_t parent, device_t self, void *aux) { struct zsc_softc *zsc = device_private(parent); struct zskbd_softc *zskbd = device_private(self); struct zsc_attach_args *args = aux; struct zs_chanstate *cs; struct zskbd_internal *zsi; struct wskbddev_attach_args a; int s, isconsole; zskbd->zskbd_dev = self; cs = zsc->zsc_cs[args->channel]; cs->cs_private = zskbd; cs->cs_ops = &zsops_zskbd; isconsole = (args->hwflags & ZS_HWFLAG_CONSOLE); if (isconsole) { zsi = &zskbd_console_internal; } else { zsi = malloc(sizeof(struct zskbd_internal), M_DEVBUF, M_NOWAIT); zsi->zsi_ks.attmt.sendchar = zskbd_sendchar; zsi->zsi_ks.attmt.cookie = cs; zsi->zsi_cs = cs; } zskbd->sc_itl = zsi; aprint_normal("\n"); /* Initialize the speed, etc. */ s = splzs(); /* May need reset... */ zs_write_reg(cs, 9, ZSWR9_A_RESET); /* These are OK as set by zscc: WR3, WR4, WR5 */ /* We don't care about status or tx interrupts. */ cs->cs_preg[1] = ZSWR1_RIE; (void) zs_set_speed(cs, ZSKBD_BPS); zs_loadchannelregs(cs); splx(s); if (!isconsole) lk201_init(&zsi->zsi_ks); /* XXX should identify keyboard ID here XXX */ /* XXX layout and the number of LED is varying XXX */ zskbd->kbd_type = WSKBD_TYPE_LK201; zskbd->sc_enabled = 1; a.console = isconsole; a.keymap = &zskbd_keymapdata; a.accessops = &zskbd_accessops; a.accesscookie = zskbd; zskbd->sc_wskbddev = config_found(self, &a, wskbddevprint); } int zskbd_cnattach(struct zs_chanstate *cs) { (void) zs_set_speed(cs, ZSKBD_BPS); zs_loadchannelregs(cs); zskbd_console_internal.zsi_ks.attmt.sendchar = zskbd_sendchar; zskbd_console_internal.zsi_ks.attmt.cookie = cs; lk201_init(&zskbd_console_internal.zsi_ks); zskbd_console_internal.zsi_cs = cs; wskbd_cnattach(&zskbd_consops, &zskbd_console_internal, &zskbd_keymapdata); return 0; } static int zskbd_enable(void *v, int on) { struct zskbd_softc *sc = v; sc->sc_enabled = on; return 0; } static int zskbd_sendchar(void *v, u_char c) { struct zs_chanstate *cs = v; zs_write_data(cs, c); DELAY(4000); return (0); } static void zskbd_cngetc(void *v, u_int *type, int *data) { struct zskbd_internal *zsi = v; int c; do { c = zs_getc(zsi->zsi_cs); } while (!lk201_decode(&zsi->zsi_ks, c, type, data)); } static void zskbd_cnpollc(void *v, int on) { #if 0 struct zskbd_internal *zsi = v; #endif } static void zskbd_set_leds(void *v, int leds) { struct zskbd_softc *sc = v; lk201_set_leds(&sc->sc_itl->zsi_ks, leds); } static int zskbd_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l) { struct zskbd_softc *sc = v; switch (cmd) { case WSKBDIO_GTYPE: *(int *)data = sc->kbd_type; return 0; case WSKBDIO_SETLEDS: lk201_set_leds(&sc->sc_itl->zsi_ks, *(int *)data); return 0; case WSKBDIO_GETLEDS: /* XXX don't dig in kbd internals */ *(int *)data = sc->sc_itl->zsi_ks.leds_state; return 0; case WSKBDIO_COMPLEXBELL: lk201_bell(&sc->sc_itl->zsi_ks, (struct wskbd_bell_data *)data); return 0; case WSKBDIO_SETKEYCLICK: lk201_set_keyclick(&sc->sc_itl->zsi_ks, *(int *)data); return 0; case WSKBDIO_GETKEYCLICK: /* XXX don't dig in kbd internals */ *(int *)data = sc->sc_itl->zsi_ks.kcvol; return 0; } return EPASSTHROUGH; } static void zskbd_input(struct zskbd_softc *sc, int data) { u_int type; int val; if (sc->sc_enabled == 0) return; if (lk201_decode(&sc->sc_itl->zsi_ks, data, &type, &val)) wskbd_input(sc->sc_wskbddev, type, val); } /**************************************************************** * Interface to the lower layer (zscc) ****************************************************************/ static void zskbd_rxint(struct zs_chanstate *); static void zskbd_stint(struct zs_chanstate *, int); static void zskbd_txint(struct zs_chanstate *); static void zskbd_softint(struct zs_chanstate *); static void zskbd_rxint(struct zs_chanstate *cs) { struct zskbd_softc *zskbd; int put, put_next; u_char c, rr1; zskbd = cs->cs_private; put = zskbd->zskbd_rbput; /* * First read the status, because reading the received char * destroys the status of this char. */ rr1 = zs_read_reg(cs, 1); c = zs_read_data(cs); if (rr1 & (ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) { /* Clear the receive error. */ zs_write_csr(cs, ZSWR0_RESET_ERRORS); } zskbd->zskbd_rbuf[put] = (c << 8) | rr1; put_next = (put + 1) & ZSKBD_RX_RING_MASK; /* Would overrun if increment makes (put==get). */ if (put_next == zskbd->zskbd_rbget) { zskbd->zskbd_intr_flags |= INTR_RX_OVERRUN; } else { /* OK, really increment. */ put = put_next; } /* Done reading. */ zskbd->zskbd_rbput = put; /* Ask for softint() call. */ cs->cs_softreq = 1; } static void zskbd_txint(struct zs_chanstate *cs) { struct zskbd_softc *zskbd; zskbd = cs->cs_private; zs_write_csr(cs, ZSWR0_RESET_TXINT); zskbd->zskbd_intr_flags |= INTR_TX_EMPTY; /* Ask for softint() call. */ cs->cs_softreq = 1; } static void zskbd_stint(struct zs_chanstate *cs, int force) { struct zskbd_softc *zskbd; int rr0; zskbd = cs->cs_private; rr0 = zs_read_csr(cs); zs_write_csr(cs, ZSWR0_RESET_STATUS); /* * We have to accumulate status line changes here. * Otherwise, if we get multiple status interrupts * before the softint runs, we could fail to notice * some status line changes in the softint routine. * Fix from Bill Studenmund, October 1996. */ cs->cs_rr0_delta |= (cs->cs_rr0 ^ rr0); cs->cs_rr0 = rr0; zskbd->zskbd_intr_flags |= INTR_ST_CHECK; /* Ask for softint() call. */ cs->cs_softreq = 1; } static void zskbd_softint(struct zs_chanstate *cs) { struct zskbd_softc *zskbd; int get, c, s; int intr_flags; u_short ring_data; zskbd = cs->cs_private; /* Atomically get and clear flags. */ s = splzs(); intr_flags = zskbd->zskbd_intr_flags; zskbd->zskbd_intr_flags = 0; /* Now lower to spltty for the rest. */ (void) spltty(); /* * Copy data from the receive ring to the event layer. */ get = zskbd->zskbd_rbget; while (get != zskbd->zskbd_rbput) { ring_data = zskbd->zskbd_rbuf[get]; get = (get + 1) & ZSKBD_RX_RING_MASK; /* low byte of ring_data is rr1 */ c = (ring_data >> 8) & 0xff; if (ring_data & ZSRR1_DO) intr_flags |= INTR_RX_OVERRUN; if (ring_data & (ZSRR1_FE | ZSRR1_PE)) { #if 0 /* XXX */ log(LOG_ERR, "%s: input error (0x%x)\n", device_xname(zskbd->zskbd_dev), ring_data); c = -1; /* signal input error */ #endif } /* Pass this up to the "middle" layer. */ zskbd_input(zskbd, c); } if (intr_flags & INTR_RX_OVERRUN) { #if 0 /* XXX */ log(LOG_ERR, "%s: input overrun\n", device_xname(zskbd->zskbd_dev)); #endif } zskbd->zskbd_rbget = get; if (intr_flags & INTR_TX_EMPTY) { /* * Transmit done. (Not expected.) */ #if 0 log(LOG_ERR, "%s: transmit interrupt?\n", device_xname(zskbd->zskbd_dev)); #endif } if (intr_flags & INTR_ST_CHECK) { /* * Status line change. (Not expected.) */ log(LOG_ERR, "%s: status interrupt?\n", device_xname(zskbd->zskbd_dev)); cs->cs_rr0_delta = 0; } splx(s); } static struct zsops zsops_zskbd = { zskbd_rxint, /* receive char available */ zskbd_stint, /* external/status */ zskbd_txint, /* xmit buffer empty */ zskbd_softint, /* process software interrupt */ };