486 lines
12 KiB
C
486 lines
12 KiB
C
/*-
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* Copyright (c) 1992, 1993 Erik Forsberg.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Ported to 386bsd Oct 17, 1992
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* Sandi Donno, Computer Science, University of Cape Town, South Africa
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* Please send bug reports to sandi@cs.uct.ac.za
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*
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* Thanks are also due to Rick Macklem, rick@snowhite.cis.uoguelph.ca -
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* although I was only partially successful in getting the alpha release
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* of his "driver for the Logitech and ATI Inport Bus mice for use with
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* 386bsd and the X386 port" to work with my Microsoft mouse, I nevertheless
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* found his code to be an invaluable reference when porting this driver
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* to 386bsd.
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*
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* Further modifications for latest 386BSD+patchkit and port to NetBSD,
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* Andrew Herbert <andrew@werple.apana.org.au> - 8 June 1993
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*
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* Cloned from the Microsoft Bus Mouse driver, also by Erik Forsberg, by
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* Andrew Herbert - 12 June 1993
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*
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* Modified for PS/2 mouse by Charles Hannum <mycroft@ai.mit.edu>
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* - 13 June 1993
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*
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* Modified for PS/2 AUX mouse by Shoji Yuen <yuen@nuie.nagoya-u.ac.jp>
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* - 24 October 1993
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*/
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#include "psm.h"
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#if NPSM > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include <machine/mouse.h>
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#include <machine/clock.h>
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#include <i386/isa/isa_device.h>
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#define PSM_DATA 0x00 /* Offset for data port, read-write */
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#define PSM_CNTRL 0x04 /* Offset for control port, write-only */
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#define PSM_STATUS 0x04 /* Offset for status port, read-only */
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/* status bits */
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#define PSM_OUTPUT_ACK 0x02 /* output acknowledge */
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/* controller commands */
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#define PSM_INT_ENABLE 0x47 /* enable controller interrupts */
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#define PSM_INT_DISABLE 0x65 /* disable controller interrupts */
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#define PSM_DISABLE 0xa7 /* disable auxiliary port */
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#define PSM_ENABLE 0xa8 /* enable auxiliary port */
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#define PSM_AUX_TEST 0xa9 /* test auxiliary port */
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/* mouse commands */
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#define PSM_SET_SCALE11 0xe6 /* set 1:1 scaling */
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#define PSM_SET_SCALE21 0xe7 /* set 2:1 scaling */
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#define PSM_SET_RES 0xe8 /* set resolution */
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#define PSM_GET_SCALE 0xe9 /* set scaling factor */
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#define PSM_SET_STREAM 0xea /* set streaming mode */
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#define PSM_SET_SAMPLE 0xf3 /* set sampling rate */
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#define PSM_DEV_ENABLE 0xf4 /* mouse on */
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#define PSM_DEV_DISABLE 0xf5 /* mouse off */
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#define PSM_RESET 0xff /* reset */
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#define PSMUNIT(dev) (minor(dev) >> 1)
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#ifndef min
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#define min(x,y) (x < y ? x : y)
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#endif min
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static int psmprobe(struct isa_device *);
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static int psmattach(struct isa_device *);
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static void psm_poll_status(int);
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static int psmaddr[NPSM]; /* Base I/O port addresses per unit */
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#define PSM_CHUNK 128 /* chunk size for read */
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#define PSM_BSIZE 1024 /* buffer size */
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struct ringbuf {
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int count, first, last;
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char queue[PSM_BSIZE];
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};
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static struct psm_softc { /* Driver status information */
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struct ringbuf inq; /* Input queue */
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struct selinfo rsel; /* Process selecting for Input */
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unsigned char state; /* Mouse driver state */
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unsigned char status; /* Mouse button status */
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unsigned char button; /* Previous mouse button status bits */
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int x, y; /* accumulated motion in the X,Y axis */
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#ifdef DEVFS
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void *devfs_token;
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void *n_devfs_token;
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#endif
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} psm_softc[NPSM];
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#define PSM_OPEN 1 /* Device is open */
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#define PSM_ASLP 2 /* Waiting for mouse data */
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struct isa_driver psmdriver = { psmprobe, psmattach, "psm" };
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static d_open_t psmopen;
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static d_close_t psmclose;
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static d_read_t psmread;
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static d_ioctl_t psmioctl;
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static d_select_t psmselect;
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#define CDEV_MAJOR 21
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static struct cdevsw psm_cdevsw =
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{ psmopen, psmclose, psmread, nowrite, /*21*/
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psmioctl, nostop, nullreset, nodevtotty,
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psmselect, nommap, NULL, "psm", NULL, -1 };
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static void
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psm_write_dev(int ioport, u_char value)
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{
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psm_poll_status(ioport);
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outb(ioport+PSM_CNTRL, 0xd4);
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psm_poll_status(ioport);
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outb(ioport+PSM_DATA, value);
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}
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static inline void
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psm_command(int ioport, u_char value)
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{
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psm_poll_status(ioport);
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outb(ioport+PSM_CNTRL, 0x60);
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psm_poll_status(ioport);
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outb(ioport+PSM_DATA, value);
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}
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static int
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psmprobe(struct isa_device *dvp)
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{
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/* XXX: Needs a real probe routine. */
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int ioport, c, unit;
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ioport=dvp->id_iobase;
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unit=dvp->id_unit;
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#ifndef PSM_NO_RESET
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psm_write_dev(ioport, PSM_RESET); /* Reset aux device */
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#endif
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psm_poll_status(ioport);
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outb(ioport+PSM_CNTRL, PSM_AUX_TEST);
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psm_poll_status(ioport);
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#if 0
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outb(ioport+PSM_CNTRL, 0xaa);
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#endif
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c = inb(ioport+PSM_DATA);
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if(c & 0x04) {
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/* printf("PS/2 AUX mouse is not found\n");*/
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psm_command(ioport, PSM_INT_DISABLE);
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psmaddr[unit] = 0; /* Device not found */
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return (0);
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}
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/* printf("PS/2 AUX mouse found. Installing driver\n");*/
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return (4);
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}
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static int
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psmattach(struct isa_device *dvp)
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{
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int unit = dvp->id_unit;
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int ioport = dvp->id_iobase;
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struct psm_softc *sc = &psm_softc[unit];
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/* Save I/O base address */
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psmaddr[unit] = ioport;
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/* Disable mouse interrupts */
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psm_poll_status(ioport);
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outb(ioport+PSM_CNTRL, PSM_ENABLE);
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#ifdef 0
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psm_write(ioport, PSM_SET_RES);
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psm_write(ioport, 0x03); /* 8 counts/mm */
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psm_write(ioport, PSM_SET_SCALE);
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psm_write(ioport, 0x02); /* 2:1 */
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psm_write(ioport, PSM_SET_SCALE21);
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psm_write(ioport, PSM_SET_SAMPLE);
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psm_write(ioport, 0x64); /* 100 samples/sec */
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psm_write(ioport, PSM_SET_STREAM);
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#endif
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psm_poll_status(ioport);
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outb(ioport+PSM_CNTRL, PSM_DISABLE);
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psm_command(ioport, PSM_INT_DISABLE);
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/* Setup initial state */
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sc->state = 0;
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/* Done */
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return (0); /* XXX eh? usually 1 indicates success */
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}
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static int
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psmopen(dev_t dev, int flag, int fmt, struct proc *p)
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{
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struct psm_softc *sc;
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int ioport;
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int unit = PSMUNIT(dev);
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/* Validate unit number */
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if (unit >= NPSM)
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return (ENXIO);
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/* Get device data */
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sc = &psm_softc[unit];
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ioport = psmaddr[unit];
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/* If device does not exist */
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if (ioport == 0)
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return (ENXIO);
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/* Disallow multiple opens */
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if (sc->state & PSM_OPEN)
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return (EBUSY);
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/* Initialize state */
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sc->state |= PSM_OPEN;
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sc->rsel.si_flags = 0;
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sc->rsel.si_pid = 0;
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sc->status = 0;
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sc->button = 0;
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sc->x = 0;
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sc->y = 0;
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/* Allocate and initialize a ring buffer */
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sc->inq.count = sc->inq.first = sc->inq.last = 0;
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/* Enable Bus Mouse interrupts */
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psm_write_dev(ioport, PSM_DEV_ENABLE);
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psm_poll_status(ioport);
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outb(ioport+PSM_CNTRL, PSM_ENABLE);
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psm_command(ioport, PSM_INT_ENABLE);
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/* Successful open */
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#ifdef DEVFS
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sc->devfs_token =
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devfs_add_devswf(&psm_cdevsw, unit << 1, DV_CHR, 0, 0, 0666,
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"psm%d", unit);
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sc->n_devfs_token =
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devfs_add_devswf(&psm_cdevsw, (unit<<1)+1, DV_CHR,0, 0, 0666,
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"npsm%d", unit);
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#endif
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return (0);
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}
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static void
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psm_poll_status(int ioport)
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{
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u_char c;
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while(c = inb(ioport+PSM_STATUS) & 0x03)
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if(c & PSM_OUTPUT_ACK == PSM_OUTPUT_ACK) {
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/* XXX - Avoids some keyboard hangs during probe */
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DELAY(6);
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inb(ioport+PSM_DATA);
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}
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return;
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}
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static int
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psmclose(dev_t dev, int flag, int fmt, struct proc *p)
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{
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int unit, ioport;
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struct psm_softc *sc;
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/* Get unit and associated info */
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unit = PSMUNIT(dev);
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sc = &psm_softc[unit];
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ioport = psmaddr[unit];
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/* Disable further mouse interrupts */
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psm_command(ioport, PSM_INT_DISABLE);
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psm_poll_status(ioport);
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outb(ioport+PSM_CNTRL, PSM_DISABLE);
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/* Complete the close */
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sc->state &= ~PSM_OPEN;
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/* close is almost always successful */
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return (0);
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}
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static int
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psmread(dev_t dev, struct uio *uio, int flag)
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{
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int s;
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int error = 0; /* keep compiler quiet, even though initialisation
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is unnecessary */
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unsigned length;
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struct psm_softc *sc;
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unsigned char buffer[PSM_CHUNK];
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/* Get device information */
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sc = &psm_softc[PSMUNIT(dev)];
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/* Block until mouse activity occured */
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s = spltty();
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while (sc->inq.count == 0) {
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if (minor(dev) & 0x1) {
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splx(s);
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return (EWOULDBLOCK);
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}
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sc->state |= PSM_ASLP;
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error = tsleep((caddr_t)sc, PZERO | PCATCH, "psmrea", 0);
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if (error != 0) {
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splx(s);
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return (error);
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}
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}
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/* Transfer as many chunks as possible */
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while (sc->inq.count > 0 && uio->uio_resid > 0) {
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length = min(sc->inq.count, uio->uio_resid);
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if (length > sizeof(buffer))
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length = sizeof(buffer);
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/* Remove a small chunk from input queue */
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if (sc->inq.first + length >= PSM_BSIZE) {
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bcopy(&sc->inq.queue[sc->inq.first],
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buffer, PSM_BSIZE - sc->inq.first);
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bcopy(sc->inq.queue, &buffer[PSM_BSIZE - sc->inq.first],
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length - (PSM_BSIZE - sc->inq.first));
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}
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else
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bcopy(&sc->inq.queue[sc->inq.first], buffer, length);
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sc->inq.first = (sc->inq.first + length) % PSM_BSIZE;
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sc->inq.count -= length;
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/* Copy data to user process */
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error = uiomove(buffer, length, uio);
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if (error)
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break;
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}
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sc->x = sc->y = 0;
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/* Allow interrupts again */
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splx(s);
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return (error);
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}
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static int
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psmioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p)
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{
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struct psm_softc *sc;
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struct mouseinfo info;
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int s, error;
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/* Get device information */
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sc = &psm_softc[PSMUNIT(dev)];
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/* Perform IOCTL command */
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switch (cmd) {
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case MOUSEIOCREAD:
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/* Don't modify info while calculating */
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s = spltty();
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/* Build mouse status octet */
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info.status = sc->status;
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if (sc->x || sc->y)
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info.status |= MOVEMENT;
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/* Encode X and Y motion as good as we can */
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if (sc->x > 127)
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info.xmotion = 127;
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else if (sc->x < -128)
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info.xmotion = -128;
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else
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info.xmotion = sc->x;
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if (sc->y > 127)
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info.ymotion = 127;
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else if (sc->y < -128)
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info.ymotion = -128;
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else
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info.ymotion = sc->y;
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/* Reset historical information */
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sc->x = 0;
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sc->y = 0;
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sc->status &= ~BUTCHNGMASK;
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/* Allow interrupts and copy result buffer */
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splx(s);
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error = copyout(&info, addr, sizeof(struct mouseinfo));
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break;
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default:
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error = EINVAL;
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break;
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}
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/* Return error code */
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return (error);
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}
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void
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psmintr(int unit)
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{
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struct psm_softc *sc = &psm_softc[unit];
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int ioport = psmaddr[unit];
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sc->inq.queue[sc->inq.last++ % PSM_BSIZE] = inb(ioport+PSM_DATA);
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sc->inq.count++;
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if (sc -> state & PSM_ASLP) {
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sc->state &= ~PSM_ASLP;
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wakeup((caddr_t)sc);
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}
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selwakeup(&sc->rsel);
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}
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static int
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psmselect(dev_t dev, int rw, struct proc *p)
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{
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int s, ret;
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struct psm_softc *sc = &psm_softc[PSMUNIT(dev)];
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/* Silly to select for output */
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if (rw == FWRITE)
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return (0);
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/* Return true if a mouse event available */
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s = spltty();
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if (sc->inq.count)
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ret = 1;
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else {
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selrecord(p, &sc->rsel);
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ret = 0;
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}
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splx(s);
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return (ret);
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}
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static psm_devsw_installed = 0;
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static void
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psm_drvinit(void *unused)
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{
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dev_t dev;
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if( ! psm_devsw_installed ) {
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dev = makedev(CDEV_MAJOR, 0);
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cdevsw_add(&dev,&psm_cdevsw, NULL);
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psm_devsw_installed = 1;
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}
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}
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SYSINIT(psmdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,psm_drvinit,NULL)
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#endif /* NPSM > 0 */
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