Home | History | Annotate | Line # | Download | only in isa
lms.c revision 1.9 
      1 /*-
      2  * Copyright (c) 1993, 1994 Charles Hannum.
      3  * Copyright (c) 1992, 1993 Erik Forsberg.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  *
     12  * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
     13  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     14  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
     15  * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     16  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     17  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     18  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
     19  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     20  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     21  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     22  *
     23  *	$Id: lms.c,v 1.9 1994/03/06 17:19:10 mycroft Exp $
     24  */
     25 
     26 #include "lms.h"
     27 
     28 #include <sys/param.h>
     29 #include <sys/kernel.h>
     30 #include <sys/systm.h>
     31 #include <sys/buf.h>
     32 #include <sys/malloc.h>
     33 #include <sys/ioctl.h>
     34 #include <sys/tty.h>
     35 #include <sys/file.h>
     36 #include <sys/select.h>
     37 #include <sys/proc.h>
     38 #include <sys/vnode.h>
     39 #include <sys/device.h>
     40 
     41 #include <machine/cpu.h>
     42 #include <machine/pio.h>
     43 #include <machine/mouse.h>
     44 
     45 #include <i386/isa/isa_device.h>
     46 
     47 #define	LMS_DATA	0       /* offset for data port, read-only */
     48 #define	LMS_SIGN	1       /* offset for signature port, read-write */
     49 #define	LMS_INTR	2       /* offset for interrupt port, read-only */
     50 #define	LMS_CNTRL	2       /* offset for control port, write-only */
     51 #define	LMS_CONFIG	3	/* for configuration port, read-write */
     52 #define	LMS_NPORTS	4
     53 
     54 #define	LMS_CHUNK	128	/* chunk size for read */
     55 #define	LMS_BSIZE	1020	/* buffer size */
     56 
     57 struct lms_softc {		/* driver status information */
     58 	struct device sc_dev;
     59 
     60 	struct clist sc_q;
     61 	struct selinfo sc_rsel;
     62 	u_short sc_iobase;	/* I/O port base */
     63 	u_char sc_state;	/* mouse driver state */
     64 #define	LMS_OPEN	0x01	/* device is open */
     65 #define	LMS_ASLP	0x02	/* waiting for mouse data */
     66 	u_char sc_status;	/* mouse button status */
     67 	int sc_x, sc_y;		/* accumulated motion in the X,Y axis */
     68 } lms_softc[NLMS];
     69 
     70 int lmsprobe __P((struct isa_device *));
     71 int lmsattach __P((struct isa_device *));
     72 int lmsintr __P((int));
     73 
     74 struct isa_driver lmsdriver = { lmsprobe, lmsattach, "lms" };
     75 
     76 #define	LMSUNIT(dev)	(minor(dev))
     77 
     78 int
     79 lmsprobe(isa_dev)
     80 	struct isa_device *isa_dev;
     81 {
     82 	u_short iobase = isa_dev->id_iobase;
     83 
     84 	/* Configure and check for port present. */
     85 	outb(iobase + LMS_CONFIG, 0x91);
     86 	delay(10);
     87 	outb(iobase + LMS_SIGN, 0x0c);
     88 	delay(10);
     89 	if (inb(iobase + LMS_SIGN) != 0x0c)
     90 		return 0;
     91 	outb(iobase + LMS_SIGN, 0x50);
     92 	delay(10);
     93 	if (inb(iobase + LMS_SIGN) != 0x50)
     94 		return 0;
     95 
     96 	/* Disable interrupts. */
     97 	outb(iobase + LMS_CNTRL, 0x10);
     98 
     99 	return LMS_NPORTS;
    100 }
    101 
    102 int
    103 lmsattach(isa_dev)
    104 	struct isa_device *isa_dev;
    105 {
    106 	struct lms_softc *sc = &lms_softc[isa_dev->id_unit];
    107 	u_short iobase = isa_dev->id_iobase;
    108 
    109 	/* Other initialization was done by lmsprobe. */
    110 	sc->sc_iobase = iobase;
    111 	sc->sc_state = 0;
    112 
    113 	/* XXX HACK */
    114 	sprintf(sc->sc_dev.dv_xname, "%s%d", lmsdriver.name, isa_dev->id_unit);
    115 	sc->sc_dev.dv_unit = isa_dev->id_unit;
    116 }
    117 
    118 int
    119 lmsopen(dev, flag)
    120 	dev_t dev;
    121 	int flag;
    122 {
    123 	int unit = LMSUNIT(dev);
    124 	struct lms_softc *sc;
    125 
    126 	if (unit >= NLMS)
    127 		return ENXIO;
    128 	sc = &lms_softc[unit];
    129 	if (!sc->sc_iobase)
    130 		return ENXIO;
    131 
    132 	if (sc->sc_state & LMS_OPEN)
    133 		return EBUSY;
    134 
    135 	if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1)
    136 		return ENOMEM;
    137 
    138 	sc->sc_state |= LMS_OPEN;
    139 	sc->sc_status = 0;
    140 	sc->sc_x = sc->sc_y = 0;
    141 
    142 	/* Enable interrupts. */
    143 	outb(sc->sc_iobase + LMS_CNTRL, 0);
    144 
    145 	return 0;
    146 }
    147 
    148 int
    149 lmsclose(dev, flag)
    150 	dev_t dev;
    151 	int flag;
    152 {
    153 	struct lms_softc *sc = &lms_softc[LMSUNIT(dev)];
    154 
    155 	/* Disable interrupts. */
    156 	outb(sc->sc_iobase + LMS_CNTRL, 0x10);
    157 
    158 	sc->sc_state &= ~LMS_OPEN;
    159 
    160 	clfree(&sc->sc_q);
    161 
    162 	return 0;
    163 }
    164 
    165 int
    166 lmsread(dev, uio, flag)
    167 	dev_t dev;
    168 	struct uio *uio;
    169 	int flag;
    170 {
    171 	struct lms_softc *sc = &lms_softc[LMSUNIT(dev)];
    172 	int s;
    173 	int error;
    174 	size_t length;
    175 	u_char buffer[LMS_CHUNK];
    176 
    177 	/* Block until mouse activity occured. */
    178 
    179 	s = spltty();
    180 	while (sc->sc_q.c_cc == 0) {
    181 		if (flag & IO_NDELAY) {
    182 			splx(s);
    183 			return EWOULDBLOCK;
    184 		}
    185 		sc->sc_state |= LMS_ASLP;
    186 		if (error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0)) {
    187 			sc->sc_state &= ~LMS_ASLP;
    188 			splx(s);
    189 			return error;
    190 		}
    191 	}
    192 	splx(s);
    193 
    194 	/* Transfer as many chunks as possible. */
    195 
    196 	while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) {
    197 		length = min(sc->sc_q.c_cc, uio->uio_resid);
    198 		if (length > sizeof(buffer))
    199 			length = sizeof(buffer);
    200 
    201 		/* Remove a small chunk from the input queue. */
    202 		(void) q_to_b(&sc->sc_q, buffer, length);
    203 
    204 		/* Copy the data to the user process. */
    205 		if (error = uiomove(buffer, length, uio))
    206 			break;
    207 	}
    208 
    209 	return error;
    210 }
    211 
    212 int
    213 lmsioctl(dev, cmd, addr, flag)
    214 	dev_t dev;
    215 	int cmd;
    216 	caddr_t addr;
    217 	int flag;
    218 {
    219 	struct lms_softc *sc = &lms_softc[LMSUNIT(dev)];
    220 	struct mouseinfo info;
    221 	int s;
    222 	int error;
    223 
    224 	switch (cmd) {
    225 	case MOUSEIOCREAD:
    226 		s = spltty();
    227 
    228 		info.status = sc->sc_status;
    229 		if (sc->sc_x || sc->sc_y)
    230 			info.status |= MOVEMENT;
    231 
    232 		if (sc->sc_x > 127)
    233 			info.xmotion = 127;
    234 		else if (sc->sc_x < -127)
    235 			/* Bounding at -127 avoids a bug in XFree86. */
    236 			info.xmotion = -127;
    237 		else
    238 			info.xmotion = sc->sc_x;
    239 
    240 		if (sc->sc_y > 127)
    241 			info.ymotion = 127;
    242 		else if (sc->sc_y < -127)
    243 			info.ymotion = -127;
    244 		else
    245 			info.ymotion = sc->sc_y;
    246 
    247 		/* Reset historical information. */
    248 		sc->sc_x = sc->sc_y = 0;
    249 		sc->sc_status &= ~BUTCHNGMASK;
    250 		flushq(&sc->sc_q);
    251 
    252 		splx(s);
    253 		error = copyout(&info, addr, sizeof(struct mouseinfo));
    254 		break;
    255 
    256 	default:
    257 		error = EINVAL;
    258 		break;
    259 	}
    260 
    261 	return error;
    262 }
    263 
    264 int
    265 lmsintr(unit)
    266 	int unit;
    267 {
    268 	struct lms_softc *sc = &lms_softc[unit];
    269 	u_short iobase = sc->sc_iobase;
    270 	u_char hi, lo, buttons, changed;
    271 	char dx, dy;
    272 	u_char buffer[5];
    273 
    274 	if ((sc->sc_state & LMS_OPEN) == 0)
    275 		/* Interrupts are not expected. */
    276 		return 0;
    277 
    278 	outb(iobase + LMS_CNTRL, 0xab);
    279 	hi = inb(iobase + LMS_DATA);
    280 	outb(iobase + LMS_CNTRL, 0x90);
    281 	lo = inb(iobase + LMS_DATA);
    282 	dx = ((hi & 0x0f) << 4) | (lo & 0x0f);
    283 	/* Bounding at -127 avoids a bug in XFree86. */
    284 	dx = (dx == -128) ? -127 : dx;
    285 
    286 	outb(iobase + LMS_CNTRL, 0xf0);
    287 	hi = inb(iobase + LMS_DATA);
    288 	outb(iobase + LMS_CNTRL, 0xd0);
    289 	lo = inb(iobase + LMS_DATA);
    290 	dy = ((hi & 0x0f) << 4) | (lo & 0x0f);
    291 	dy = (dy == -128) ? 127 : -dy;
    292 
    293 	outb(iobase + LMS_CNTRL, 0);
    294 
    295 	buttons = (~hi >> 5) & 0x07;
    296 	changed = ((buttons ^ sc->sc_status) & 0x07) << 3;
    297 	sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed;
    298 
    299 	if (dx || dy || changed) {
    300 		/* Update accumulated movements. */
    301 		sc->sc_x += dx;
    302 		sc->sc_y += dy;
    303 
    304 		/* Add this event to the queue. */
    305 		buffer[0] = 0x80 | (buttons ^ BUTSTATMASK);
    306 		buffer[1] = dx;
    307 		buffer[2] = dy;
    308 		buffer[3] = buffer[4] = 0;
    309 		(void) b_to_q(buffer, sizeof buffer, &sc->sc_q);
    310 
    311 		if (sc->sc_state & LMS_ASLP) {
    312 			sc->sc_state &= ~LMS_ASLP;
    313 			wakeup((caddr_t)sc);
    314 		}
    315 		selwakeup(&sc->sc_rsel);
    316 	}
    317 
    318 	return 1;
    319 }
    320 
    321 int
    322 lmsselect(dev, rw, p)
    323 	dev_t dev;
    324 	int rw;
    325 	struct proc *p;
    326 {
    327 	struct lms_softc *sc = &lms_softc[LMSUNIT(dev)];
    328 	int s;
    329 	int ret;
    330 
    331 	if (rw == FWRITE)
    332 		return 0;
    333 
    334 	s = spltty();
    335 	if (!sc->sc_q.c_cc) {
    336 		selrecord(p, &sc->sc_rsel);
    337 		ret = 0;
    338 	} else
    339 		ret = 1;
    340 	splx(s);
    341 
    342 	return ret;
    343 }
    344