980 lines
28 KiB
C
980 lines
28 KiB
C
/* $NetBSD: pms.c,v 1.7 2001/09/16 16:34:28 wiz Exp $ */
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/*
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* Copyright 1997
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* Digital Equipment Corporation. All rights reserved.
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*
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* This software is furnished under license and may be used and
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* copied only in accordance with the following terms and conditions.
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* Subject to these conditions, you may download, copy, install,
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* use, modify and distribute this software in source and/or binary
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* form. No title or ownership is transferred hereby.
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*
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* 1) Any source code used, modified or distributed must reproduce
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* and retain this copyright notice and list of conditions as
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* they appear in the source file.
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*
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* 2) No right is granted to use any trade name, trademark, or logo of
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* Digital Equipment Corporation. Neither the "Digital Equipment
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* Corporation" name nor any trademark or logo of Digital Equipment
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* Corporation may be used to endorse or promote products derived
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* from this software without the prior written permission of
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* Digital Equipment Corporation.
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*
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* 3) This software is provided "AS-IS" and any express or implied
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* warranties, including but not limited to, any implied warranties
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* of merchantability, fitness for a particular purpose, or
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* non-infringement are disclaimed. In no event shall DIGITAL be
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* liable for any damages whatsoever, and in particular, DIGITAL
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* shall not be liable for special, indirect, consequential, or
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* incidental damages or damages for lost profits, loss of
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* revenue or loss of use, whether such damages arise in contract,
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* negligence, tort, under statute, in equity, at law or otherwise,
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* even if advised of the possibility of such damage.
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*/
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/*-
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* Copyright (c) 1994 Charles M. Hannum.
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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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**++
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**
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** FACILITY:
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**
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** Mouse driver.
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**
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** ABSTRACT:
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**
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** The mose driver has been cleand up for use with the PC87307VUL
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** Super I/O chip. The main modification has been to change the
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** driver to use the bus_space_ macros. This allows the mouse
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** to be configured to any base address. It relies on the keyboard
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** passing it's io handle in the isa_attach_args structure.
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**
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** NOTE : The mouse is an auxiliary device off the keyboard and as such
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** shares the same device registers. This shouldn't be an issue
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** since each logical device generates it's own unique IRQ. But
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** it is worth noting that reseting or mucking with one can affect
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** the other.
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**
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** AUTHORS:
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**
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** Unknown. Modified by Patrick Crilly, and John Court
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** Digital Equipment Corporation.
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**
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** CREATION DATE:
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**
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** Unknown
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**
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**--
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*/
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#include "opms.h"
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#if NOPMS > 1
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#error Only one PS/2 style mouse may be configured into your system.
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#endif
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/file.h>
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#include <sys/select.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/device.h>
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#include <sys/poll.h>
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#include <machine/kerndebug.h>
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#include <dev/isa/isavar.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <machine/pio.h>
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#include <machine/mouse.h>
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#include <machine/conf.h>
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#include <dev/isa/isavar.h>
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#include <arm32/shark/i8042reg.h>
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/*
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** Macro definitions
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*/
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/* mouse commands */
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#define PMS_SET_SCALE11 0xe6 /* set scaling 1:1 */
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#define PMS_SET_SCALE21 0xe7 /* set scaling 2:1 */
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#define PMS_SET_RES 0xe8 /* set resolution */
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#define PMS_GET_SCALE 0xe9 /* get scaling factor */
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#define PMS_SET_STREAM 0xea /* set streaming mode */
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#define PMS_SET_SAMPLE 0xf3 /* set sampling rate */
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#define PMS_MOUSE_ENABLE 0xf4 /* mouse on */
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#define PMS_MOUSE_DISABLE 0xf5 /* mouse off */
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#define PMS_RESET 0xff /* reset */
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#define PMS_CHUNK 128 /* chunk size for read */
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#define PMS_BSIZE 1020 /* buffer size */
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/* Masks for the first byte of a packet */
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#define PS2LBUTMASK 0x01 /* left mouse button set */
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#define PS2RBUTMASK 0x02 /* right mouse button set */
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#define PS2MBUTMASK 0x04 /* middle mouse button set */
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#define PS2OVERFLOW 0xc0 /* Movement overflow in X or Y direction*/
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#define PS2BUTTONBIT 0x08 /* This bit ALWAYS set in button byte */
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/* Mouse states */
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#define PMS_INIT 0x00 /* initial state */
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#define PMS_OPEN 0x01 /* device is open */
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#define PMS_ASLP 0x02 /* waiting for mouse data */
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/* Byte that we're reading in the mouse protocol */
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#define PMS_RD_BYTE1 0x00 /* reading first byte */
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#define PMS_RD_BYTE2 0x01 /* reading second byte */
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#define PMS_RD_BYTE3 0x02 /* reading third byte */
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/* Macro to extract the minor device nuymber from the device identifier */
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#define PMSUNIT(dev) (minor(dev))
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/* Softc structure for the mouse */
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struct pms_softc
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{
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struct device sc_dev;
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void *sc_ih;
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struct clist sc_q;
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struct selinfo sc_rsel;
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u_char sc_state; /* mouse driver state */
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u_char sc_status; /* mouse button status */
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u_char sc_protocol_byte;/* mouse byte that we're waiting on */
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int sc_x;
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int sc_y; /* accumulated motion in the Y axis */
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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};
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/*
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** Forward routine declarations
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*/
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int pmsprobe __P((struct device *,
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struct cfdata *,
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void *));
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void pmsattach __P((struct device *,
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struct device *,
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void *));
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int pmsintr __P((void *));
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/*
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** Global variables
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*/
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/* Autoconfiguration data structures */
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struct cfattach opms_ca =
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{
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sizeof(struct pms_softc), pmsprobe, pmsattach,
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};
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extern struct cfdriver opms_cd;
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/* variable to control which debugs printed if kernel compiled with
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** option KERNEL_DEBUG.
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*/
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int pmsdebug = KERN_DEBUG_WARNING | KERN_DEBUG_ERROR;
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/*
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**++
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** FUNCTIONAL DESCRIPTION:
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**
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** pmsprobe
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**
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** This is the probe routine for the mouse. It checks to see that
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** we are attaching to the pc or vt device. It then resets mouse
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** and disables interrupts on it. Interrupts on the mouse are
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** enabled when the mouse device is opened.
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**
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** FORMAL PARAMETERS:
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**
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** parent - pointer to the parent device.
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** match - not used
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** aux - pointer to an isa_attach_args structure.
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**
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** IMPLICIT INPUTS:
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**
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** none.
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**
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** IMPLICIT OUTPUTS:
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**
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** none.
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**
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** FUNCTION VALUE:
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**
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** 0 - Probe failed to find the requested device.
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** 1 - Probe sucessfully talked to the device.
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**
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** SIDE EFFECTS:
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**
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** none.
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**--
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*/
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int
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pmsprobe(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct cfdata *cf = match;
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int probeOk = 0; /* assume failure */
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struct isa_attach_args *ia = aux;
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KERN_DEBUG(pmsdebug, KERN_DEBUG_INFO, ("pmsprobe: entered\n"));
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/*
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** We only attach to the keyboard controller via
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** the console drivers. (We really wish we could be the
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** child of a real keyboard controller driver.)
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*/
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if ((parent != NULL) &&
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(!strcmp(parent->dv_cfdata->cf_driver->cd_name, "pc") ||
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(!strcmp(parent->dv_cfdata->cf_driver->cd_name, "vt"))))
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{
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/*
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** The mouse shares registers with the parent, so
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** we expect that the parent has mapped the io space.
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** Check an IRQ has been specified in the configuration
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*/
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if (cf->cf_loc[0] != -1)
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{
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/* Clear out any garbage left in there at this point in time
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*/
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i8042_flush(ia->ia_iot, (bus_space_handle_t)ia->ia_aux);
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/* reset the mouse and check the command is received.
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*/
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if (!i8042_cmd(ia->ia_iot, (bus_space_handle_t)ia->ia_aux, I8042_AUX_CMD,
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I8042_CHECK_RESPONSE, KBR_ACK, PMS_RESET))
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{
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KERN_DEBUG(pmsdebug, KERN_DEBUG_ERROR,
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("pms_reset: reset failed\n"));
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}
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else
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{
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/*
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** Test the mouse port. A value of 0 in the data
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** register indicates success.
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*/
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if ( I8042_AUXTEST(ia->ia_iot, (bus_space_handle_t)ia->ia_aux) )
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{
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probeOk = 1;
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}
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else
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{
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KERN_DEBUG(pmsdebug, KERN_DEBUG_ERROR,
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("pmsprobe: aux test failed\n"));
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}
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/*
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** Disable the mouse. It is enabled when
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** the pms device is opened.
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*/
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(void) I8042_WRITECCB(ia->ia_iot, (bus_space_handle_t)ia->ia_aux,
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NOAUX_CMDBYTE);
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}
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} /* end-if irq set */
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} /* end-if supported console device */
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return (probeOk);
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} /* End pmsprobe */
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/*
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**++
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** FUNCTIONAL DESCRIPTION:
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**
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** pmsattach
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**
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** Initialise mouse softc structure and set up our interrupt routine.
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**
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** NOTE: Do not use the irq in the isa_attach_args structure to
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** set up the interrupt, as this is the parent's irq.
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**
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** FORMAL PARAMETERS:
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**
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** parent - pointer to my parents device structure.
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** self - pointer to my softc with device structure at front.
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** aux - pointer to the isa_attach_args structure.
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**
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** IMPLICIT INPUTS:
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**
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** None
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**
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** IMPLICIT OUTPUTS:
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**
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** None
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**
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** FUNCTION VALUE:
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**
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** none.
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**
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** SIDE EFFECTS:
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**
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** none.
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**--
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*/
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void
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pmsattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct pms_softc *sc = (void *)self;
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int irq = self->dv_cfdata->cf_loc[0];
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struct isa_attach_args *ia = aux;
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printf(" irq %d\n", irq);
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/*
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** Initialise the mouse softc structure.
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** Other initialization was done by pmsprobe.
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*/
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sc->sc_iot = ia->ia_iot;
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sc->sc_ioh = (bus_space_handle_t)ia->ia_aux;
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sc->sc_state = PMS_INIT;
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sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_LEVEL,
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IPL_TTY, pmsintr, sc);
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KERN_DEBUG(pmsdebug, KERN_DEBUG_INFO,
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("pmsattach: IOT 0x%p: IOH 0x%lx\n", sc->sc_iot, sc->sc_ioh));
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return;
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} /* End pmsattach */
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/*
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**++
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** FUNCTIONAL DESCRIPTION:
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**
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** pmsopen
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**
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** This routine is to open the mouse device.
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** It first makes sure that the device unit specified is valid
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** and not already in use. It then enables the mouse device
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** and interrupts on it.
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**
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** FORMAL PARAMETERS:
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**
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** dev - Device identifier consisting of major and minor numbers.
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** flag - not used
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** mode - not used.
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** p - not used.
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**
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** IMPLICIT INPUTS:
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**
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** none.
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**
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** IMPLICIT OUTPUTS:
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**
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** none.
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**
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** FUNCTION VALUE:
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**
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** 0 - Success
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** ENXIO - invalid device specified for open.
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** EBUSY - The unit is already opened for exclusive use and the
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** current requestor is NOT root.
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**
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** SIDE EFFECTS:
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**
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** none.
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**--
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*/
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int
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pmsopen(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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int unit = PMSUNIT(dev);
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struct pms_softc *sc;
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/* Sanity check the minor device number we have been instructed
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** to open and set up our softc structure pointer.
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*/
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if (unit >= opms_cd.cd_ndevs)
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{
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return ENXIO;
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}
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sc = opms_cd.cd_devs[unit];
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if (!sc)
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{
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return ENXIO;
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}
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/* Check to see if the mouse has already been opened.
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*/
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if (sc->sc_state & PMS_OPEN)
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{
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return EBUSY;
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}
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/* Initialise the mouse softc structure
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*/
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if (clalloc(&sc->sc_q, PMS_BSIZE, 0) == -1)
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{
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return ENOMEM;
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}
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sc->sc_state |= PMS_OPEN;
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sc->sc_status = 0;
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sc->sc_x = 0;
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sc->sc_y = 0;
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/* Enable the device both in the mouse and in the keyboard after making
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** sure there isn't any garbage in the input buffer.
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*/
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i8042_flush(sc->sc_iot, sc->sc_ioh);
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sc->sc_protocol_byte = PMS_RD_BYTE1;
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(void) i8042_cmd(sc->sc_iot, sc->sc_ioh, I8042_AUX_CMD,
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I8042_NO_RESPONSE, NULL, PMS_MOUSE_ENABLE);
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(void) I8042_AUXENABLE(sc->sc_iot, sc->sc_ioh);
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/* Enable interrupts on the axilliary device.
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*/
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(void) I8042_WRITECCB(sc->sc_iot, sc->sc_ioh, CMDBYTE);
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return 0;
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} /* End pmsopen */
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/*
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**++
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** FUNCTIONAL DESCRIPTION:
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**
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** pmsclose
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**
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** This function is called on the last close for a device unit.
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** It flushes the queue of mouse events and disables the mouse.
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**
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** FORMAL PARAMETERS:
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**
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** dev - Device identifier consisting of major and minor numbers.
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** flag - Not used.
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** mode - Not used.
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** p - Not used.
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**
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** IMPLICIT INPUTS:
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**
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** None
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**
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** IMPLICIT OUTPUTS:
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**
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** None
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**
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** FUNCTION VALUE:
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**
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** 0 - Always returns success.
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**
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** SIDE EFFECTS:
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**
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** none.
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**--
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*/
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int
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pmsclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct pms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
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/* Disable the mouse device and interrupts on it. Note that if we don't
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** flush the device first it seems to generate LOTs of interrupts after
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** disable and hangs the system.
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*/
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i8042_flush(sc->sc_iot, sc->sc_ioh);
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(void) i8042_cmd(sc->sc_iot, sc->sc_ioh, I8042_AUX_CMD,
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I8042_NO_RESPONSE, NULL, PMS_MOUSE_DISABLE);
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i8042_flush(sc->sc_iot, sc->sc_ioh);
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(void) I8042_WRITECCB(sc->sc_iot, sc->sc_ioh, NOAUX_CMDBYTE);
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(void) I8042_AUXDISABLE(sc->sc_iot, sc->sc_ioh);
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sc->sc_state &= ~PMS_OPEN;
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/* Free the event queue
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*/
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clfree(&sc->sc_q);
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return 0;
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} /* End pmsclose */
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/*
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**++
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** FUNCTIONAL DESCRIPTION:
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**
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** pmsread
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**
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** This function handles a read on the mouse device. If there isn't
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** data immdediatley available sleep until there is or return an error
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** depending upon the flag parameter. If data is available pass as
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** much of it to the user as possible.
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**
|
||
** FORMAL PARAMETERS:
|
||
**
|
||
** dev - Device identifier consisting of major and minor numbers.
|
||
** uio - Pointer to the user I/O information (ie. read buffer).
|
||
** flag - Information on how the I/O should be done (eg. blocking
|
||
**
|
||
** IMPLICIT INPUTS:
|
||
**
|
||
** none
|
||
**
|
||
** IMPLICIT OUTPUTS:
|
||
**
|
||
** none
|
||
**
|
||
** FUNCTION VALUE:
|
||
**
|
||
** Returns zero on success and an errno on failure.
|
||
**
|
||
** SIDE EFFECTS:
|
||
**
|
||
** none
|
||
**--
|
||
*/
|
||
int
|
||
pmsread(dev, uio, flag)
|
||
dev_t dev;
|
||
struct uio *uio;
|
||
int flag;
|
||
{
|
||
struct pms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
|
||
int s;
|
||
int error = 0;
|
||
size_t length;
|
||
u_char buffer[PMS_CHUNK];
|
||
|
||
/*
|
||
** Check if there is data to be read. If there isn't
|
||
** either sleep until there is or return an error,
|
||
** depending on whether we're in blocking mode or not.
|
||
*/
|
||
s = spltty();
|
||
while (sc->sc_q.c_cc == 0)
|
||
{
|
||
if (flag & IO_NDELAY)
|
||
{
|
||
error = EWOULDBLOCK;
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
sc->sc_state |= PMS_ASLP;
|
||
error = tsleep((caddr_t)sc, PZERO | PCATCH, "pmsread", 0);
|
||
if (error)
|
||
{
|
||
sc->sc_state &= ~PMS_ASLP;
|
||
break;
|
||
}
|
||
}
|
||
} /* end-if no data in event queue */
|
||
splx(s);
|
||
/* Transfer as many chunks as possible.
|
||
*/
|
||
if (!error )
|
||
{
|
||
while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0)
|
||
{
|
||
length = min(sc->sc_q.c_cc, uio->uio_resid);
|
||
if (length > sizeof(buffer))
|
||
{
|
||
length = sizeof(buffer);
|
||
}
|
||
/* Remove a small chunk from the input queue.
|
||
*/
|
||
(void) q_to_b(&sc->sc_q, buffer, length);
|
||
/* Copy the data to the user process.
|
||
*/
|
||
if ((error = uiomove(buffer, length, uio)) != 0)
|
||
{
|
||
break;
|
||
}
|
||
} /* while there is data in the event queue */
|
||
} /* end-if not error */
|
||
|
||
return (error);
|
||
}
|
||
|
||
|
||
/*
|
||
**++
|
||
** FUNCTIONAL DESCRIPTION:
|
||
**
|
||
** pmsioctl
|
||
**
|
||
** This routine is responsible for handling ioctls on the
|
||
** mouse device. Only one ioctl is supported:
|
||
** MOUSEIOCREAD - which retruns the current mouse location
|
||
** and flushes the mouse event queue.
|
||
**
|
||
** FORMAL PARAMETERS:
|
||
**
|
||
** dev - device identifier consisting of major and minor numbers.
|
||
** cmd - requested ioctl
|
||
** addr - address of user buffer for mouse info
|
||
** flag - unused
|
||
** p - pointer to proc structure of user.
|
||
**
|
||
** IMPLICIT INPUTS:
|
||
**
|
||
** none.
|
||
**
|
||
** IMPLICIT OUTPUTS:
|
||
**
|
||
** none.
|
||
**
|
||
** FUNCTION VALUE:
|
||
**
|
||
** EINVAL - not a supported iotcl
|
||
**
|
||
** SIDE EFFECTS:
|
||
**
|
||
** none
|
||
**--
|
||
*/
|
||
int
|
||
pmsioctl(dev, cmd, addr, flag, p)
|
||
dev_t dev;
|
||
u_long cmd;
|
||
caddr_t addr;
|
||
int flag;
|
||
struct proc *p;
|
||
{
|
||
struct pms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
|
||
struct mouseinfo info;
|
||
int oldIpl;
|
||
int error;
|
||
|
||
switch (cmd)
|
||
{
|
||
#ifdef SHARK
|
||
case MOUSEIOC_READ:
|
||
#else
|
||
case MOUSEIOCREAD:
|
||
#endif
|
||
oldIpl = spltty();
|
||
info.status = sc->sc_status;
|
||
if (sc->sc_x || sc->sc_y)
|
||
{
|
||
info.status |= MOVEMENT;
|
||
}
|
||
/* Read x co-ordinate
|
||
*/
|
||
if (sc->sc_x > 127)
|
||
{
|
||
info.xmotion = 127;
|
||
}
|
||
else if (sc->sc_x < -127)
|
||
{
|
||
/* Bounding at -127 avoids a bug in XFree86.
|
||
*/
|
||
info.xmotion = -127;
|
||
}
|
||
else
|
||
{
|
||
info.xmotion = sc->sc_x;
|
||
}
|
||
/* Read y co-ordinate
|
||
*/
|
||
if (sc->sc_y > 127)
|
||
{
|
||
info.ymotion = 127;
|
||
}
|
||
else if (sc->sc_y < -127)
|
||
{
|
||
info.ymotion = -127;
|
||
}
|
||
else
|
||
{
|
||
info.ymotion = sc->sc_y;
|
||
}
|
||
/* Reset historical information.
|
||
*/
|
||
sc->sc_x = 0;
|
||
sc->sc_y = 0;
|
||
sc->sc_status &= ~BUTCHNGMASK;
|
||
ndflush(&sc->sc_q, sc->sc_q.c_cc); /* empty event queue */
|
||
|
||
splx(oldIpl);
|
||
error = copyout(&info, addr, sizeof(struct mouseinfo));
|
||
break;
|
||
|
||
default:
|
||
error = EINVAL;
|
||
break;
|
||
} /* end-switch cmd */
|
||
|
||
return error;
|
||
} /* End pmsioctl */
|
||
|
||
|
||
|
||
/*
|
||
**++
|
||
** FUNCTIONAL DESCRIPTION:
|
||
**
|
||
** pmsintr
|
||
**
|
||
** This is the interrupt handler routine for the mouse. The mouse
|
||
** protocol consists of 3 bytes. The first byte indicates which
|
||
** buttons are pressed, the second byte the change to the x-coordinate
|
||
** and the third byte the change to the y-coordinate. The interrupt
|
||
** routine reads a byte from the mouse, using the mouse state to
|
||
** keep track of which byte in the protocol we're up to. After reading
|
||
** the third byte, the event is added to the event queue and any
|
||
** read waiting is woken.
|
||
**
|
||
** FORMAL PARAMETERS:
|
||
**
|
||
** arg - Pointer to our device/softc structure.
|
||
**
|
||
** IMPLICIT INPUTS:
|
||
**
|
||
** none.
|
||
**
|
||
** IMPLICIT OUTPUTS:
|
||
**
|
||
** none.
|
||
**
|
||
** FUNCTION VALUE:
|
||
**
|
||
** 0 - Interrupt not handled by the driver.
|
||
** 1 - Interrupt handled by the driver.
|
||
**
|
||
** SIDE EFFECTS:
|
||
**
|
||
** none.
|
||
**--
|
||
*/
|
||
int
|
||
pmsintr(arg)
|
||
void *arg;
|
||
{
|
||
struct pms_softc *sc = arg;
|
||
static u_char buttons;
|
||
u_char changed;
|
||
u_char status;
|
||
u_char buffer[5];
|
||
int handledInt;
|
||
bus_space_tag_t iot;
|
||
bus_space_handle_t ioh;
|
||
static signed char dx;
|
||
static signed char dy;
|
||
u_char value = 0; /* XXX */
|
||
|
||
iot = sc->sc_iot;
|
||
ioh = sc->sc_ioh;
|
||
handledInt = 0;
|
||
|
||
/*
|
||
** If the mouse isn't open then we shouldn't get an
|
||
** interrupt.
|
||
*/
|
||
if (sc->sc_state & PMS_OPEN)
|
||
{
|
||
/* We wait for status to be updated. For some reason the status is
|
||
** updated after the interrupt is generated. I would summise this
|
||
** is because the H/W waits for an ack on the IRQ to determine
|
||
** whether to put Keyboard or Aux port data into the buffer and
|
||
** status information, but that is only a guess.
|
||
*/
|
||
I8042_GETAUX_DATA(iot, ioh, status, value);
|
||
|
||
if ( status )
|
||
{
|
||
handledInt = 1;
|
||
switch (sc->sc_protocol_byte)
|
||
{
|
||
/* First byte of protocol consists of the following mouse bits
|
||
** Bit 7 6 5 4 3 2 1 0
|
||
** YO XO YS XS 1 0 R L
|
||
** YO = Overflow occurred in the Y direction.
|
||
** XO = Overflow occurred in the X direction.
|
||
** YS = Sign of movement data on Y axis (1 = negative)
|
||
** XS = Sign of movement data on X axis (1 = negative)
|
||
** R = Right button state (1 = pressed down)
|
||
** L = Left button state (1 = pressed down)
|
||
*/
|
||
case PMS_RD_BYTE1:
|
||
buttons = value;
|
||
|
||
if (buttons & PS2BUTTONBIT)
|
||
{
|
||
sc->sc_protocol_byte = PMS_RD_BYTE2;
|
||
}
|
||
else
|
||
{
|
||
KERN_DEBUG( pmsdebug, KERN_DEBUG_WARNING,
|
||
("pmsintr: bad button byte received 0x%x\n",
|
||
buttons));
|
||
}
|
||
break;
|
||
/* Second byte of protocol is the amount of movement in the
|
||
** X axis
|
||
*/
|
||
case PMS_RD_BYTE2:
|
||
dx = value;
|
||
/* Bounding at -127 avoids a bug in XFree86. */
|
||
dx = (dx == -128) ? -127 : dx;
|
||
sc->sc_protocol_byte = PMS_RD_BYTE3;
|
||
break;
|
||
/* Third byte if protocol is the amount of movement in the
|
||
** Y axis.
|
||
*/
|
||
case PMS_RD_BYTE3:
|
||
dy = value;
|
||
dy = (dy == -128) ? -127 : dy;
|
||
sc->sc_protocol_byte = PMS_RD_BYTE1;
|
||
/*
|
||
** Update changes to buttons.
|
||
**
|
||
** We need to swap the ordering of which button
|
||
** is set. The ps2 mouse records set buttons with
|
||
** the following ordering (from LSB)
|
||
** left-right-middle whereas the generic mouse
|
||
** (defined in ../include/mouse.h) records
|
||
** it as (from LSB) right-middle-left.
|
||
** The next three bits in the buttons field
|
||
** record whether there has been a change in
|
||
** state of the button.
|
||
*/
|
||
buttons = ((buttons & PS2LBUTMASK) << 2) |
|
||
((buttons & (PS2RBUTMASK | PS2MBUTMASK)) >> 1);
|
||
changed = ((buttons ^ sc->sc_status) & BUTSTATMASK)
|
||
<< 3;
|
||
sc->sc_status = buttons |
|
||
(sc->sc_status & ~BUTSTATMASK) | changed;
|
||
/*
|
||
** If the postion of mouse or state of buttons has
|
||
** changed update status info, queue an event
|
||
** and wakeup any read that is waiting.
|
||
*/
|
||
if (dx || dy || changed)
|
||
{
|
||
/* Update accumulated movements.
|
||
*/
|
||
sc->sc_x += dx;
|
||
sc->sc_y += dy;
|
||
/* Add this event to the queue.
|
||
*/
|
||
buffer[0] = 0x80 | (buttons ^ BUTSTATMASK);
|
||
buffer[1] = dx;
|
||
buffer[2] = dy;
|
||
buffer[3] = 0;
|
||
buffer[4] = 0;
|
||
(void) b_to_q(buffer, sizeof buffer, &sc->sc_q);
|
||
/* If there is a read blocked, wake it up
|
||
*/
|
||
if (sc->sc_state & PMS_ASLP)
|
||
{
|
||
sc->sc_state &= ~PMS_ASLP;
|
||
wakeup((caddr_t)sc);
|
||
}
|
||
/* Wakeup any selects waiting */
|
||
selwakeup(&sc->sc_rsel);
|
||
}
|
||
break;
|
||
default :
|
||
KERN_DEBUG( pmsdebug, KERN_DEBUG_WARNING,
|
||
("pmsintr: Invalid byte protocol state 0x%x\n",
|
||
sc->sc_protocol_byte));
|
||
sc->sc_protocol_byte = PMS_RD_BYTE1;
|
||
break;
|
||
}
|
||
} /* End do until data not for mouse or no data at all */
|
||
} /* End if in an open state */
|
||
|
||
return (handledInt);
|
||
} /* End pmsintr */
|
||
|
||
|
||
|
||
/*
|
||
**++
|
||
** FUNCTIONAL DESCRIPTION:
|
||
**
|
||
** pmspoll
|
||
**
|
||
** This routine is used to poll the device for the presence of a set
|
||
** of events (e.g. is there data to be read). If any of the polled
|
||
** for events are present on the device, then these events are returned;
|
||
** otherwise the process is marked as waiting for the set of events
|
||
**
|
||
** FORMAL PARAMETERS:
|
||
**
|
||
** dev - device identifier consisting of major and minor numbers.
|
||
** events - the set of events to check for.
|
||
** p - pointer to proc structure of user.
|
||
**
|
||
** IMPLICIT INPUTS:
|
||
**
|
||
** none.
|
||
**
|
||
** IMPLICIT OUTPUTS:
|
||
**
|
||
** none.
|
||
**
|
||
** FUNCTION VALUE:
|
||
**
|
||
** Set of events that were polled for and are currently available.
|
||
**
|
||
** SIDE EFFECTS:
|
||
**
|
||
** none.
|
||
**--
|
||
*/
|
||
int
|
||
pmspoll(dev, events, p)
|
||
dev_t dev;
|
||
int events;
|
||
struct proc *p;
|
||
{
|
||
struct pms_softc *sc = opms_cd.cd_devs[PMSUNIT(dev)];
|
||
int revents = 0;
|
||
int oldIpl;
|
||
|
||
oldIpl = spltty();
|
||
|
||
if (events & (POLLIN | POLLRDNORM))
|
||
{
|
||
if (sc->sc_q.c_cc > 0)
|
||
{
|
||
revents |= events & (POLLIN | POLLRDNORM);
|
||
}
|
||
else
|
||
{
|
||
/* Record that the process has done a select
|
||
*/
|
||
selrecord(p, &sc->sc_rsel);
|
||
}
|
||
}
|
||
splx(oldIpl);
|
||
return (revents);
|
||
} /* End pmspoll */
|
||
|