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lms.c revision 1.6.2.10 
      1 /*-
      2  * Copyright (c) 1993 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 1.6.2.10 1993/10/11 01:51:28 mycroft Exp $
     24  */
     25 
     26 #include "param.h"
     27 #include "kernel.h"
     28 #include "systm.h"
     29 #include "buf.h"
     30 #include "malloc.h"
     31 #include "ioctl.h"
     32 #include "tty.h"
     33 #include "file.h"
     34 #include "select.h"
     35 #include "proc.h"
     36 #include "vnode.h"
     37 #include "sys/device.h"
     38 
     39 #include "machine/cpu.h"
     40 #include "machine/mouse.h"
     41 #include "machine/pio.h"
     42 
     43 #include "i386/isa/isavar.h"
     44 #include "i386/isa/icu.h"
     45 
     46 #define LMS_DATA	0       /* Offset for data port, read-only */
     47 #define LMS_SIGN	1       /* Offset for signature port, read-write */
     48 #define LMS_INTR	2       /* Offset for interrupt port, read-only */
     49 #define LMS_CNTRL	2       /* Offset for control port, write-only */
     50 #define LMS_CONFIG	3	/* for configuration port, read-write */
     51 #define	LMS_NPORTS	4
     52 
     53 #define	LMS_CHUNK	128	/* chunk size for read */
     54 #define	LMS_BSIZE	1020	/* buffer size */
     55 
     56 struct lms_softc {		/* Driver status information */
     57 	struct	device sc_dev;
     58 	struct	isadev sc_id;
     59 	struct	intrhand sc_ih;
     60 
     61 	struct	clist sc_q;
     62 	struct	selinfo sc_rsel;
     63 	u_short	sc_iobase;	/* I/O port base */
     64 	u_char	sc_state;	/* Mouse driver state */
     65 #define LMS_OPEN	0x01	/* Device is open */
     66 #define LMS_ASLP	0x02	/* Waiting for mouse data */
     67 	u_char	sc_status;	/* Mouse button status */
     68 	int	sc_x, sc_y;	/* accumulated motion in the X,Y axis */
     69 };
     70 
     71 static int lmsprobe __P((struct device *, struct cfdata *, void *));
     72 static void lmsforceintr __P((void *));
     73 static void lmsattach __P((struct device *, struct device *, void *));
     74 static int lmsintr __P((void *));
     75 
     76 struct cfdriver lmscd =
     77 { NULL, "lms", lmsprobe, lmsattach, sizeof (struct lms_softc) };
     78 
     79 #define LMSUNIT(dev)	(minor(dev))
     80 
     81 static int
     82 lmsprobe(parent, cf, aux)
     83 	struct device *parent;
     84 	struct cfdata *cf;
     85 	void *aux;
     86 {
     87 	struct	isa_attach_args *ia = aux;
     88 	u_short	iobase = ia->ia_iobase;
     89 
     90 	if (iobase == IOBASEUNK)
     91 		return 0;
     92 
     93 	/* Configure and check for port present */
     94 	outb(iobase + LMS_CONFIG, 0x91);
     95 	delay(10);
     96 	outb(iobase + LMS_SIGN, 0x0c);
     97 	delay(10);
     98 	if (inb(iobase + LMS_SIGN) != 0x0c)
     99 		return 0;
    100 	outb(iobase + LMS_SIGN, 0x50);
    101 	delay(10);
    102 	if (inb(iobase + LMS_SIGN) != 0x50)
    103 		return 0;
    104 
    105 	if (ia->ia_irq == IRQUNK) {
    106 		ia->ia_irq = isa_discoverintr(lmsforceintr, aux);
    107 		if (ia->ia_irq == IRQNONE)
    108 			return 0;
    109 	}
    110 
    111 	/* disable interrupts */
    112 	outb(iobase + LMS_CNTRL, 0x10);
    113 
    114 	ia->ia_iosize = LMS_NPORTS;
    115 	ia->ia_drq = DRQUNK;
    116 	ia->ia_msize = 0;
    117 	return 1;
    118 }
    119 
    120 static void
    121 lmsforceintr(aux)
    122 	void *aux;
    123 {
    124 	struct	isa_attach_args *ia = aux;
    125 
    126 	/* enable interrupts; expect to get one in 1/60 second */
    127 	outb(ia->ia_iobase + LMS_CNTRL, 0);
    128 }
    129 
    130 static void
    131 lmsattach(parent, self, aux)
    132 	struct device *parent, *self;
    133 	void *aux;
    134 {
    135 	struct	lms_softc *sc = (struct lms_softc *)self;
    136 	struct	isa_attach_args *ia = aux;
    137 	u_short	iobase = ia->ia_iobase;
    138 
    139 	/* other initialization done by lmsprobe */
    140 	sc->sc_iobase = iobase;
    141 	sc->sc_state = 0;
    142 
    143 	printf(": Logitech mouse\n");
    144 	isa_establish(&sc->sc_id, &sc->sc_dev);
    145 
    146 	sc->sc_ih.ih_fun = lmsintr;
    147 	sc->sc_ih.ih_arg = sc;
    148 	intr_establish(ia->ia_irq, &sc->sc_ih, DV_TTY);
    149 }
    150 
    151 int
    152 lmsopen(dev, flag)
    153 	dev_t dev;
    154 	int flag;
    155 {
    156 	int	unit = LMSUNIT(dev);
    157 	struct	lms_softc *sc;
    158 
    159 	if (unit >= lmscd.cd_ndevs)
    160 		return ENXIO;
    161 	sc = lmscd.cd_devs[unit];
    162 	if (!sc)
    163 		return ENXIO;
    164 
    165 	if (sc->sc_state & LMS_OPEN)
    166 		return EBUSY;
    167 
    168 	if (clalloc(&sc->sc_q, LMS_BSIZE, 0) == -1)
    169 		return ENOMEM;
    170 
    171 	sc->sc_state |= LMS_OPEN;
    172 	sc->sc_status = 0;
    173 	sc->sc_x = sc->sc_y = 0;
    174 
    175 	/* enable interrupts */
    176 	outb(sc->sc_iobase + LMS_CNTRL, 0);
    177 
    178 	return 0;
    179 }
    180 
    181 int
    182 lmsclose(dev, flag)
    183 	dev_t dev;
    184 	int flag;
    185 {
    186 	int	unit = LMSUNIT(dev);
    187 	struct	lms_softc *sc = lmscd.cd_devs[unit];
    188 
    189 	/* disable interrupts */
    190 	outb(sc->sc_iobase + LMS_CNTRL, 0x10);
    191 
    192 	sc->sc_state &= ~LMS_OPEN;
    193 
    194 	clfree(&sc->sc_q);
    195 
    196 	return 0;
    197 }
    198 
    199 int
    200 lmsread(dev, uio, flag)
    201 	dev_t dev;
    202 	struct uio *uio;
    203 	int flag;
    204 {
    205 	int	unit = LMSUNIT(dev);
    206 	struct	lms_softc *sc = lmscd.cd_devs[unit];
    207 	int	s;
    208 	int	error;
    209 	size_t	length;
    210 	u_char	buffer[LMS_CHUNK];
    211 
    212 	/* Block until mouse activity occured */
    213 
    214 	s = spltty();
    215 	while (sc->sc_q.c_cc == 0) {
    216 		if (flag & IO_NDELAY) {
    217 			splx(s);
    218 			return EWOULDBLOCK;
    219 		}
    220 		sc->sc_state |= LMS_ASLP;
    221 		if (error = tsleep((caddr_t)sc, PZERO | PCATCH, "lmsrea", 0)) {
    222 			sc->sc_state &= ~LMS_ASLP;
    223 			splx(s);
    224 			return error;
    225 		}
    226 	}
    227 
    228 	/* Transfer as many chunks as possible */
    229 
    230 	while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) {
    231 		length = min(sc->sc_q.c_cc, uio->uio_resid);
    232 		if (length > sizeof(buffer))
    233 			length = sizeof(buffer);
    234 
    235 		/* remove a small chunk from input queue */
    236 		(void) q_to_b(&sc->sc_q, buffer, length);
    237 
    238 		/* copy data to user process */
    239 		if (error = uiomove(buffer, length, uio))
    240 			break;
    241 	}
    242 
    243 	/* reset counters */
    244 	sc->sc_x = sc->sc_y = 0;
    245 
    246 	splx(s);
    247 	return error;
    248 }
    249 
    250 int
    251 lmsioctl(dev, cmd, addr, flag)
    252 	dev_t dev;
    253 	int cmd;
    254 	caddr_t addr;
    255 	int flag;
    256 {
    257 	int	unit = LMSUNIT(dev);
    258 	struct	lms_softc *sc = lmscd.cd_devs[unit];
    259 	struct	mouseinfo info;
    260 	int	s;
    261 	int	error;
    262 
    263 	switch (cmd) {
    264 	    case MOUSEIOCREAD:
    265 		s = spltty();
    266 
    267 		info.status = sc->sc_status;
    268 		if (sc->sc_x || sc->sc_y)
    269 			info.status |= MOVEMENT;
    270 
    271 		if (sc->sc_x > 127)
    272 			info.xmotion = 127;
    273 		else if (sc->sc_x < -127)
    274 			/* bounding at -127 avoids a bug in XFree86 */
    275 			info.xmotion = -127;
    276 		else
    277 			info.xmotion = sc->sc_x;
    278 
    279 		if (sc->sc_y > 127)
    280 			info.ymotion = 127;
    281 		else if (sc->sc_y < -127)
    282 			info.ymotion = -127;
    283 		else
    284 			info.ymotion = sc->sc_y;
    285 
    286 		/* reset historical information */
    287 		sc->sc_x = 0;
    288 		sc->sc_y = 0;
    289 		sc->sc_status &= ~BUTCHNGMASK;
    290 		flushq(&sc->sc_q);
    291 
    292 		splx(s);
    293 		error = copyout(&info, addr, sizeof(struct mouseinfo));
    294 		break;
    295 
    296 	    default:
    297 		error = EINVAL;
    298 		break;
    299 	}
    300 
    301 	return error;
    302 }
    303 
    304 int
    305 lmsintr(arg)
    306 	void *arg;
    307 {
    308 	struct	lms_softc *sc = (struct lms_softc *)arg;
    309 	u_short	iobase = sc->sc_iobase;
    310 	u_char	hi, lo, buttons, changed;
    311 	char	dx, dy;
    312 	u_char	buffer[5];
    313 
    314 	if ((sc->sc_state & LMS_OPEN) == 0)
    315 		/* interrupts not expected */
    316 		return 0;
    317 
    318 	outb(iobase + LMS_CNTRL, 0xab);
    319 	hi = inb(iobase + LMS_DATA);
    320 	outb(iobase + LMS_CNTRL, 0x90);
    321 	lo = inb(iobase + LMS_DATA);
    322 	dx = ((hi & 0x0f) << 4) | (lo & 0x0f);
    323 	/* bounding at -127 avoids a bug in XFree86 */
    324 	dx = (dx == -128) ? -127 : dx;
    325 
    326 	outb(iobase + LMS_CNTRL, 0xf0);
    327 	hi = inb(iobase + LMS_DATA);
    328 	outb(iobase + LMS_CNTRL, 0xd0);
    329 	lo = inb(iobase + LMS_DATA);
    330 	dy = ((hi & 0x0f) << 4) | (lo & 0x0f);
    331 	dy = (dy == -128) ? 127 : -dy;
    332 
    333 	outb(iobase + LMS_CNTRL, 0);
    334 
    335 	buttons = (~hi >> 5) & 0x07;
    336 	changed = ((buttons ^ sc->sc_status) & 0x07) << 3;
    337 	sc->sc_status = buttons | (sc->sc_status & ~BUTSTATMASK) | changed;
    338 
    339 	if (dx || dy || changed) {
    340 		/* update accumulated movements */
    341 		sc->sc_x += dx;
    342 		sc->sc_y += dy;
    343 
    344 		buffer[0] = 0x80 | (buttons ^ BUTSTATMASK);
    345 		buffer[1] = dx;
    346 		buffer[2] = dy;
    347 		buffer[3] = buffer[4] = 0;
    348 		(void) b_to_q(buffer, sizeof buffer, &sc->sc_q);
    349 
    350 		if (sc->sc_state & LMS_ASLP) {
    351 			sc->sc_state &= ~LMS_ASLP;
    352 			wakeup((caddr_t)sc);
    353 		}
    354 		selwakeup(&sc->sc_rsel);
    355 	}
    356 
    357 	return 1;
    358 }
    359 
    360 int
    361 lmsselect(dev, rw, p)
    362 	dev_t dev;
    363 	int rw;
    364 	struct proc *p;
    365 {
    366 	int	unit = LMSUNIT(dev);
    367 	struct	lms_softc *sc = lmscd.cd_devs[unit];
    368 	int	s;
    369 	int	ret;
    370 
    371 	if (rw == FWRITE)
    372 		return 0;
    373 
    374 	s = spltty();
    375 	if (sc->sc_q.c_cc)
    376 		ret = 1;
    377 	else {
    378 		selrecord(p, &sc->sc_rsel);
    379 		ret = 0;
    380 	}
    381 	splx(s);
    382 
    383 	return ret;
    384 }
    385