/* $NetBSD: zsms.c,v 1.18 2009/05/12 14:47:05 cegger 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. * * @(#)ms.c 8.1 (Berkeley) 6/11/93 */ /* * VSXXX mice attached with channel A of the 1st SCC */ #include __KERNEL_RCSID(0, "$NetBSD: zsms.c,v 1.18 2009/05/12 14:47:05 cegger Exp $"); #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 ZSMS_RX_RING_SIZE 256 #define ZSMS_RX_RING_MASK (ZSMS_RX_RING_SIZE-1) /* * Output buffer. Only need a few chars. */ #define ZSMS_TX_RING_SIZE 16 #define ZSMS_TX_RING_MASK (ZSMS_TX_RING_SIZE-1) #define ZSMS_BPS 4800 struct zsms_softc { /* driver status information */ device_t zsms_dev; /* required first: base device */ struct zs_chanstate *zsms_cs; /* Flags to communicate with zsms_softintr() */ volatile int zsms_intr_flags; #define INTR_RX_OVERRUN 1 #define INTR_TX_EMPTY 2 #define INTR_ST_CHECK 4 /* * The receive ring buffer. */ u_int zsms_rbget; /* ring buffer `get' index */ volatile u_int zsms_rbput; /* ring buffer `put' index */ u_short zsms_rbuf[ZSMS_RX_RING_SIZE]; /* rr1, data pairs */ int sc_enabled; /* input enabled? */ int sc_selftest; /* self test in progress */ int inputstate; u_int buttons; int dx, dy; device_t sc_wsmousedev; }; static struct zsops zsops_zsms; static int zsms_match(device_t, cfdata_t, void *); static void zsms_attach(device_t, device_t, void *); static void zsms_input(void *, int); CFATTACH_DECL_NEW(zsms, sizeof(struct zsms_softc), zsms_match, zsms_attach, NULL, NULL); static int zsms_enable(void *); static int zsms_ioctl(void *, u_long, void *, int, struct lwp *); static void zsms_disable(void *); static const struct wsmouse_accessops zsms_accessops = { zsms_enable, zsms_ioctl, zsms_disable, }; static int zsms_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 zsms_attach(device_t parent, device_t self, void *aux) { struct zsc_softc *zsc = device_private(parent); struct zsms_softc *zsms = device_private(self); struct zsc_attach_args *args = aux; struct zs_chanstate *cs; struct wsmousedev_attach_args a; int s; zsms->zsms_dev = self; cs = zsc->zsc_cs[args->channel]; cs->cs_private = zsms; cs->cs_ops = &zsops_zsms; zsms->zsms_cs = cs; 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, WR5 */ /* We don't care about status or tx interrupts. */ cs->cs_preg[1] = ZSWR1_RIE; (void) zs_set_speed(cs, ZSMS_BPS); /* mouse wants odd parity */ cs->cs_preg[4] |= ZSWR4_PARENB; /* cs->cs_preg[4] &= ~ZSWR4_EVENP; (no-op) */ zs_loadchannelregs(cs); splx(s); a.accessops = &zsms_accessops; a.accesscookie = zsms; zsms->sc_enabled = 0; zsms->sc_selftest = 0; zsms->sc_wsmousedev = config_found(self, &a, wsmousedevprint); } static int zsms_enable(void *v) { struct zsms_softc *sc = v; if (sc->sc_enabled) return EBUSY; sc->sc_selftest = 4; /* wait for 4 byte reply upto 1/2 sec */ zs_write_data(sc->zsms_cs, MOUSE_SELF_TEST); (void)tsleep(zsms_enable, TTIPRI, "zsmsopen", hz / 2); if (sc->sc_selftest != 0) { sc->sc_selftest = 0; return ENXIO; } /* XXX DELAY before mode set? */ zs_write_data(sc->zsms_cs, MOUSE_INCREMENTAL); sc->sc_enabled = 1; sc->inputstate = 0; return 0; } static void zsms_disable(void *v) { struct zsms_softc *sc = v; sc->sc_enabled = 0; } static int zsms_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l) { if (cmd == WSMOUSEIO_GTYPE) { *(u_int *)data = WSMOUSE_TYPE_VSXXX; return 0; } return EPASSTHROUGH; } static void zsms_input(void *vsc, int data) { struct zsms_softc *sc = vsc; if (sc->sc_enabled == 0) { if (sc->sc_selftest > 0) { sc->sc_selftest -= 1; if (sc->sc_selftest == 0) wakeup(zsms_enable); } return; } if ((data & MOUSE_START_FRAME) != 0) sc->inputstate = 1; else sc->inputstate++; if (sc->inputstate == 1) { /* LMR -> RML: wsevents counts 0 for the left-most */ sc->buttons = data & 02; if (data & 01) sc->buttons |= 04; if (data & 04) sc->buttons |= 01; sc->dx = data & MOUSE_X_SIGN; sc->dy = data & MOUSE_Y_SIGN; } else if (sc->inputstate == 2) { if (sc->dx == 0) sc->dx = -data; else sc->dx = data; } else if (sc->inputstate == 3) { sc->inputstate = 0; if (sc->dy == 0) sc->dy = -data; else sc->dy = data; wsmouse_input(sc->sc_wsmousedev, sc->buttons, sc->dx, sc->dy, 0, 0, WSMOUSE_INPUT_DELTA); } return; } /**************************************************************** * Interface to the lower layer (zscc) ****************************************************************/ static void zsms_rxint(struct zs_chanstate *); static void zsms_stint(struct zs_chanstate *, int); static void zsms_txint(struct zs_chanstate *); static void zsms_softint(struct zs_chanstate *); static void zsms_rxint(struct zs_chanstate *cs) { struct zsms_softc *zsms; int put, put_next; uint8_t c, rr1; zsms = cs->cs_private; put = zsms->zsms_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); } zsms->zsms_rbuf[put] = (c << 8) | rr1; put_next = (put + 1) & ZSMS_RX_RING_MASK; /* Would overrun if increment makes (put==get). */ if (put_next == zsms->zsms_rbget) { zsms->zsms_intr_flags |= INTR_RX_OVERRUN; } else { /* OK, really increment. */ put = put_next; } /* Done reading. */ zsms->zsms_rbput = put; /* Ask for softint() call. */ cs->cs_softreq = 1; } static void zsms_txint(struct zs_chanstate *cs) { struct zsms_softc *zsms; zsms = cs->cs_private; zs_write_csr(cs, ZSWR0_RESET_TXINT); zsms->zsms_intr_flags |= INTR_TX_EMPTY; /* Ask for softint() call. */ cs->cs_softreq = 1; } static void zsms_stint(struct zs_chanstate *cs, int force) { struct zsms_softc *zsms; int rr0; zsms = 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; zsms->zsms_intr_flags |= INTR_ST_CHECK; /* Ask for softint() call. */ cs->cs_softreq = 1; } static void zsms_softint(struct zs_chanstate *cs) { struct zsms_softc *zsms; int get, c, s; int intr_flags; u_short ring_data; zsms = cs->cs_private; /* Atomically get and clear flags. */ s = splzs(); intr_flags = zsms->zsms_intr_flags; zsms->zsms_intr_flags = 0; /* Now lower to spltty for the rest. */ (void) spltty(); /* * Copy data from the receive ring to the event layer. */ get = zsms->zsms_rbget; while (get != zsms->zsms_rbput) { ring_data = zsms->zsms_rbuf[get]; get = (get + 1) & ZSMS_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)) { log(LOG_ERR, "%s: input error (0x%x)\n", device_xname(zsms->zsms_dev), ring_data); c = -1; /* signal input error */ } /* Pass this up to the "middle" layer. */ zsms_input(zsms, c); } if (intr_flags & INTR_RX_OVERRUN) { log(LOG_ERR, "%s: input overrun\n", device_xname(zsms->zsms_dev)); } zsms->zsms_rbget = get; if (intr_flags & INTR_TX_EMPTY) { /* * Transmit done. (Not expected.) */ log(LOG_ERR, "%s: transmit interrupt?\n", device_xname(zsms->zsms_dev)); } if (intr_flags & INTR_ST_CHECK) { /* * Status line change. (Not expected.) */ log(LOG_ERR, "%s: status interrupt?\n", device_xname(zsms->zsms_dev)); cs->cs_rr0_delta = 0; } splx(s); } static struct zsops zsops_zsms = { zsms_rxint, /* receive char available */ zsms_stint, /* external/status */ zsms_txint, /* xmit buffer empty */ zsms_softint, /* process software interrupt */ };