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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [char/] [mc68328digi.c] - Blame information for rev 1765

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/* mc68328digi.c
 *
 * Linux driver to make the PalmPilot's touchpad behave
 * like a PS/2 mouse.
 *
 * My apologies, this is currently a complete mess. It'll notice taps
 * on Copilot and a real Pilot, but can't figure out the coordinates on the Pilot.
 *
 * Based on touchpad driver.
 * Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>,
 *                     The Silver Hammer Group, Ltd.
 *
 * Original History
 * -------
 *      0.0 1997-05-16 Alan Cox <alan@cymru.net> - Pad reader
 *      0.1 1997-05-19 Robin O'Leary <robin@acm.org> - PS/2 emulation
 *      0.2 1997-06-03 Robin O'Leary <robin@acm.org> - tap gesture
 *      0.3 1997-07-10 Robin O'Leary <robin@acm.org> - sticky drag
 *
 * Distribution
 * ------------
 * Copyright (C) 1997-06-18 Robin O'Leary <robin@acm.org>  All rights reserved.
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Get the latest version from ftp://swan.ml.org/pub/pc110/
 */
 
#include <linux/config.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/busmouse.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/miscdevice.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
 
#include <asm/signal.h>
#include <asm/io.h>
#include <asm/irq.h>
 
#include "mc68328digi.h"
 
 
static struct mc68328digi_params default_params = {
        MC68328DIGI_PS2,        /* read mode */
        50 MS,          /* bounce interval */
        800 MS,         /* sticky-drag */
        300 MS,         /* tap interval */
        10,             /* IRQ */
        0x15E0,         /* I/O port */
        0,               /* Not calibrated */
        1<<16,  0,       /* X calibration values (unity) */
        1<<16,  0        /* Y calibration values (unity) */
};
 
 
static struct mc68328digi_params current_params;
 
 
/* driver/filesystem interface management */
static struct wait_queue *queue;
static struct fasync_struct *asyncptr;
static int active=0;     /* number of concurrent open()s */
 
 
/*
 * Utility to reset a timer to go off some time in the future.
 */
static void set_timer_callback(struct timer_list *timer, int ticks)
{
        cli();
        del_timer(timer);
        timer->expires = jiffies+ticks;
        add_timer(timer);
        sti();
}
 
 
/* Take care of letting any waiting processes know that
 * now would be a good time to do a read().  Called
 * whenever a state transition occurs, real or synthetic.
 */
static void wake_readers(void)
{
        wake_up_interruptible(&queue);
        if(asyncptr)
                kill_fasync(asyncptr, SIGIO);
}
 
 
/*****************************************************************************/
/*
 * Deal with the messy business of synthesizing button tap and drag
 * events.
 *
 * Exports:
 *      notify_digi_up_down()
 *              Must be called whenever debounced pad up/down state changes.
 *      button_pending
 *              Flag is set whenever read_button() has new values
 *              to return.
 *      read_button()
 *              Obtains the current synthetic mouse button state.
 */
 
/* These keep track of up/down transitions needed to generate the
 * synthetic mouse button events.  While recent_transition is set,
 * up/down events cause transition_count to increment.  tap_timer
 * turns off the recent_transition flag and may cause some synthetic
 * up/down mouse events to be created by incrementing synthesize_tap.
 */
static int button_pending=0;
static int recent_transition=0;
static int transition_count=0;
static int synthesize_tap=0;
static void tap_timeout(unsigned long data);
static struct timer_list tap_timer = { NULL, NULL, 0, 0, tap_timeout };
 
 
/* This callback goes off a short time after an up/down transition;
 * before it goes off, transitions will be considered part of a
 * single PS/2 event and counted in transition_count.  Once the
 * timeout occurs the recent_transition flag is cleared and
 * any synthetic mouse up/down events are generated.
 */
static void tap_timeout(unsigned long data)
{
        printk("tap_timeout\n");
        if(!recent_transition)
        {
                printk("mc68328digi: tap_timeout but no recent transition!\n");
        }
        if( (transition_count==2)
         || (transition_count==4)
         || (transition_count==6) )
        {
                synthesize_tap+=transition_count;
                button_pending = 1;
                wake_readers();
        }
        recent_transition=0;
}
 
 
static void read_button(int *b)
{
        if(synthesize_tap)
        {
                *b=--synthesize_tap & 1;
        }
        else
        {
                *b=(!recent_transition && transition_count==3); /* drag */
        }
        button_pending=(synthesize_tap>0);
}
 
 
 
/*****************************************************************************/
/*
 * Read pad absolute co-ordinates and debounced up/down state.
 *
 * Exports:
 *      pad_irq()
 *              Function to be called whenever the pad signals
 *              that it has new data available.
 *      read_raw_digi()
 *              Returns the most current pad state.
 *      xy_pending
 *              Flag is set whenever read_raw_digi() has new values
 *              to return.
 * Imports:
 *      wake_readers()
 *              Called when movement occurs.
 *      notify_digi_up_down()
 *              Called when debounced up/down status changes.
 */
 
/* These are up/down state and absolute co-ords read directly from pad */
static int raw_data[3];
static int raw_data_count=0;
static int raw_x=0, raw_y=0;      /* most recent absolute co-ords read */
static int raw_down=0;           /* raw up/down state */
static int debounced_down=0;     /* up/down state after debounce processing */
static int is_new_stroke=0;      /* set when xy are discontinuous */
static enum {
        NO_BOUNCE, JUST_GONE_UP, JUST_GONE_DOWN, STICKY_DRAG_UP
} bounce=NO_BOUNCE;
                                /* set just after an up/down transition */
static int xy_pending=0; /* set if new data have not yet been read */
 
/* Timer goes off a short while after an up/down transition and copies
 * the value of raw_down to debounced_down.
 */
static void bounce_timeout(unsigned long data);
static struct timer_list bounce_timer = { NULL, NULL, 0, 0, bounce_timeout };
 
 
/* Called by the raw pad read routines when a (debounced) up/down
 * transition is detected.
 */
void notify_digi_up_down(void)
{
        if(recent_transition)
        {
                transition_count++;
        }
        else
        {
                transition_count=1;
                recent_transition=1;
        }
        set_timer_callback(&tap_timer, current_params.tap_interval);
 
        /* changes to transition_count can cause reported button to change */
        button_pending = 1;
        is_new_stroke=1;
        wake_readers();
}
 
 
 
static void bounce_timeout(unsigned long data)
{
        /* No further up/down transitions happened within the
         * bounce period, so treat this as a genuine transition.
         */
        switch(bounce)
        {
                case NO_BOUNCE:
                {
                        /* Strange; the timer callback should only go off if
                         * we were expecting to do bounce processing!
                         */
                        printk("mc68328digi, bounce_timeout: bounce flag not set!\n");
                        break;
                }
                case JUST_GONE_UP:
                case STICKY_DRAG_UP:
                {
                        /* The last up we spotted really was an up, so set
                         * debounced state the same as raw state.
                         */
                        bounce=NO_BOUNCE;
                        if(debounced_down==raw_down)
                        {
                                printk("mc68328digi, bounce_timeout: raw already debounced!\n");
                        }
                        debounced_down=raw_down;
                        notify_digi_up_down();
                        break;
                }
                case JUST_GONE_DOWN:
                {
                        /* We don't debounce down events, but we still time
                         * out soon after one occurs so we can avoid the (x,y)
                         * skittering that sometimes happens.
                         */
                        bounce=NO_BOUNCE;
                        break;
                }
        }
}
 
static void handle_raw(int new_x, int new_y, int new_down);
 
static void release_timeout(void);
static struct timer_list release_timer = { NULL, NULL, 0, 0, release_timeout };
static void release_timeout(void)
{
        (*((volatile unsigned long*)0xFFFFF304)) |= (1<<20);
 
        handle_raw(raw_x, raw_y, 0);
 
        (*((volatile unsigned long*)0xFFFFF304)) &= ~(1<<20);   /* Enable interrupt */
}
 
 
/*
 * Callback when pad's irq goes off; copies values in to raw_* globals;
 * initiates debounce processing.
 */
void digi_interrupt(int irq, void *ptr, struct pt_regs *regs)
{
        unsigned long flags;
        int new_x, new_y, new_down;
        volatile int i;
 
/*      set_timer_callback(&release_timer, 1);*/
 
        save_flags(flags); cli();
 
#define PORTF_DIR (*(volatile unsigned char*)0xFFFFF428)
#define PORTF_DAT (*(volatile unsigned char*)0xFFFFF429)
#define PORTF_PUP (*(volatile unsigned char*)0xFFFFF42A)
#define PORTF_SEL (*(volatile unsigned char*)0xFFFFF42B)
 
#define PORTM_DIR (*(volatile unsigned char*)0xFFFFF448)
#define PORTM_DAT (*(volatile unsigned char*)0xFFFFF449)
#define PORTM_PUP (*(volatile unsigned char*)0xFFFFF44A)
#define PORTM_SEL (*(volatile unsigned char*)0xFFFFF44B)
 
#define SPIMCONT (*(volatile unsigned short*)0xFFFFF802)
#define SPIMDATA (*(volatile unsigned short*)0xFFFFF800)
 
 
#define SPIMCONT_IRQEN  0x40
#define SPIMCONT_IRQ    0x80
#define SPIMCONT_XCH    0x100
#define SPIMCONT_EN     0x200
 
#define PF_DigiYVOff    0x01
#define PF_DigiYGOn     0x02
#define PF_DigiXVOff    0x04
#define PF_DigiXGOn     0x08
#define PF_LCDEnable    0x10
#define PF_LCDVccOff    0x20
#define PF_LCDVeeOn     0x40
#define PF_ADSelect     0x80
 
#define PF_DigiMask     0x0f
#define PF_DigiOff      (PF_DigiYVOff|PF_DigiXVOff)
#define PF_DigiTap      (PF_DigiXGOn|PF_DigiYVOff|PF_DigiXVOff)
#define PF_DigiGetY     (PF_DigiXGOn|PF_DigiYVOff)
#define PF_DigiGetX     (PF_DigiXVOff|PF_DigiYGOn)
 
#define PM_VCCFAIL      0x04
#define PM_DOCKBUTTON   0x20
#define PM_PENIO        0x40
#define PM_DOCKIN       0x80
 
 
#if 0
        PORTM_PUP &= ~PM_PENIO;
        PORTM_SEL |= PM_PENIO;
 
        PORTF_DAT = (PORTF_DAT & ~PF_DigiMask) | PF_DigiOff;
        PORTF_DAT = (PORTF_DAT & ~PF_DigiMask) | PF_DigiGetY;
 
 
        SPIMCONT = 0x427f;
        SPIMDATA = 0xc000;
 
        PORTF_DAT &= ~PF_ADSelect;
 
        /* Tell SPIM to sequence */
        SPIMCONT &= ~SPIMCONT_XCH;
        SPIMCONT |= SPIMCONT_XCH;
 
        /* Wait till sample is retrieved */
        while (!(SPIMCONT & SPIMCONT_IRQ))
                ;
        new_y = SPIMDATA;
 
        PORTF_DAT |= PF_ADSelect;
 
        SPIMCONT &= ~SPIMCONT_EN;
 
        PORTF_DAT = (PORTF_DAT & ~PF_DigiMask) | PF_DigiOff;
        PORTF_DAT = (PORTF_DAT & ~PF_DigiMask) | PF_DigiGetX;
 
        SPIMCONT = 0x427F;
        SPIMDATA = 0xffff;
 
        PORTF_DAT &= ~PF_ADSelect;
 
        /* Tell SPIM to sequence */
        SPIMCONT &= ~SPIMCONT_XCH;
        SPIMCONT |= SPIMCONT_XCH;
 
        /* Wait till sample is retrieved */
        while (!(SPIMCONT & SPIMCONT_IRQ))
                ;
        new_x = SPIMDATA;
 
        PORTF_DAT |= PF_ADSelect;
 
        SPIMCONT &= ~SPIMCONT_EN;
 
        PORTF_DAT = (PORTF_DAT & PF_DigiMask) | PF_DigiOff;
        PORTF_DAT = (PORTF_DAT & PF_DigiMask) | PF_DigiTap;
 
        PORTM_PUP |= PM_PENIO;
        PORTM_SEL &= ~PM_PENIO;
#endif
 
 
#if 1
 
 
#define PFDATA (*((volatile unsigned char*)0xFFFFF429)) 
 
#if 0
        (*(volatile unsigned char*)0xFFFFF44A) &= ~64; /* Switch off Port M Pen IRQ pullup */
        (*(volatile unsigned char*)0xFFFFF44B) |= 64;  /* Turn on Port M Pen IRQ select */
#endif
        (*(volatile unsigned char*)0xFFFFF44A) = 0xad; /* Switch off Port M Pen IRQ pullup */
        (*(volatile unsigned char*)0xFFFFF44B) = 0xd0;  /* Turn on Port M Pen IRQ select */
 
#if 0
        (*(volatile unsigned char*)0xFFFFF429) = 0xD5;    /* Set PFDATA to D5, Turn off digi power */
#endif
        PFDATA = (PFDATA & 0xf0) | 5;
        (*(volatile unsigned char*)0xFFFFF429) = 0xD9;    /* Set PFDATA to D9, Measure Y */
        (*(volatile unsigned short*)0xFFFFF802) = 0x427f; /* Set SPIMCONT to 427f */
        (*(volatile unsigned short*)0xFFFFF800) = 0xc000; /* Set SPIMDATA to c000, Preload data*/
#if 0
        (*((volatile unsigned char*)0xFFFFF439)) &= ~2;    /* Enable A/D */
#endif
        PFDATA &= ~0x80;
#if 0
        (*((volatile unsigned char*)0xFFFFF429)) = 0x59;    /* Set PFDATA to 59, Measure Y, A/D select HW2  */
#endif  
        (*((volatile unsigned short*)0xFFFFF802)) &= ~0x0100; /* Set SPIMCONT to 427f */
        (*((volatile unsigned short*)0xFFFFF802)) |= 0x0100; /* Set SPIMCONT to 437f */
 
        while(!((*((volatile unsigned short*)0xFFFFF802)) & 0x80))
                ;
 
        new_y = (*((volatile unsigned short*)0xFFFFF800)); /* Read SPIMDATA */
 
        PFDATA |= 0x80;
#if 0
        (*(volatile unsigned char*)0xFFFFF429) = 0xD9;    /* Set PFDATA to D9 */
#endif
#if 0
        (*((volatile unsigned char*)0xFFFFF439)) |= 2;    /* Disable A/D */
#endif
        (*(volatile unsigned short*)0xFFFFF802) = 0x407f;/* Set SPIMCONT to 407f */
 
        (*(volatile unsigned char*)0xFFFFF429) = 0xD5;    /* Set PFDATA to D5 */
        (*(volatile unsigned char*)0xFFFFF429) = 0xD6;    /* Set PFDATA to D6 */
        (*(volatile unsigned short*)0xFFFFF802) = 0x427f;/* Set SPIMCONT to 427f */
        (*(volatile unsigned short*)0xFFFFF800) = 0xffff; /* Set SPIMDATA to ffff */
 
        PFDATA &= ~0x80;
#if 0
        (*((volatile unsigned char*)0xFFFFF429)) = 0x56;    /* Set PFDATA to 56 */
#endif
#if 0
        (*((volatile unsigned char*)0xFFFFF439)) &= ~2;    /* Enable A/D */
#endif
        (*(volatile unsigned short*)0xFFFFF802) = 0x427f;/* Set SPIMCONT to 427f */
        (*((volatile unsigned short*)0xFFFFF802)) = 0x437f; /* Set SPIMCONT to 437f */
 
        while(!((*((volatile unsigned short*)0xFFFFF802)) & 0x80))
                ;
 
        new_x = (*((volatile unsigned short*)0xFFFFF800)); /* Read SPIMDATA */
 
        PFDATA |= 0x80;
#if 0
        (*(volatile unsigned char*)0xFFFFF429) = 0xD6;    /* Set PFDATA to d6 */
#endif
#if 0
        (*((volatile unsigned char*)0xFFFFF439)) |= 2;    /* Disable A/D */
#endif
        (*(volatile unsigned short*)0xFFFFF802) = 0x407f;/* Set SPIMCONT to 407f */
 
        (*(volatile unsigned char*)0xFFFFF429) = 0xD5;    /* Set PFDATA to d5 */
        (*(volatile unsigned char*)0xFFFFF429) = 0xDD;    /* Set PFDATA to dd */
 
#if 0
        (*(volatile unsigned char*)0xFFFFF44A) |= 64; /* Turn on Port M Pen IRQ pullup */
        (*(volatile unsigned char*)0xFFFFF44B) &= ~64;  /* Switch off Port M Pen IRQ select */
#endif
        (*(volatile unsigned char*)0xFFFFF44A) = 0xed; /* Switch off Port M Pen IRQ pullup */
        (*(volatile unsigned char*)0xFFFFF44B) = 0x90;  /* Turn on Port M Pen IRQ select */
 
 
#if 0   
        new_x = ((long)new_x * current_params.x_a + current_params.x_b) >> 16;
        new_y = ((long)new_y * current_params.y_a + current_params.y_b) >> 16;
 
        /*printk("calibrated x=%d, y=%d\n", new_x, new_y);*/
 
        handle_raw(new_x, new_y, 1);
#endif
 
#endif
 
        printk("raw x=%d, y=%d\n", new_x, new_y);
 
        restore_flags(flags);
 
 
 
}
 
void handle_raw(int new_x, int new_y, int new_down) {
 
        /*printk("Pen: %x,%x %x\n", new_x, new_y, new_down);*/
 
        if( (raw_x!=new_x) || (raw_y!=new_y) )
        {
                raw_x=new_x;
                raw_y=new_y;
                xy_pending=1;
        }
 
        if(new_down != raw_down)
        {
                /* Down state has changed.  raw_down always holds
                 * the most recently observed state.
                 */
                raw_down=new_down;
 
                /* Forget any earlier bounce processing */
                if(bounce)
                {
                        del_timer(&bounce_timer);
                        bounce=NO_BOUNCE;
                }
 
                if(new_down)
                {
                        if(debounced_down)
                        {
                                /* pad gone down, but we were reporting
                                 * it down anyway because we suspected
                                 * (correctly) that the last up was just
                                 * a bounce
                                 */
                                is_new_stroke=1;
                        }
                        else
                        {
                                bounce=JUST_GONE_DOWN;
                                set_timer_callback(&bounce_timer,
                                        current_params.bounce_interval);
                                /* start new stroke/tap */
                                debounced_down=new_down;
                                notify_digi_up_down();
                        }
                }
                else /* just gone up */
                {
                        if(recent_transition)
                        {
                                /* early bounces are probably part of
                                 * a multi-tap gesture, so process
                                 * immediately
                                 */
                                debounced_down=new_down;
                                notify_digi_up_down();
                        }
                        else if(transition_count==3)
                        {
                                /* give chance to move */
                                bounce=STICKY_DRAG_UP;
                                set_timer_callback(&bounce_timer,
                                        current_params.sticky_drag);
                        }
                        else
                        {
                                /* don't trust it yet */
                                bounce=JUST_GONE_UP;
                                set_timer_callback(&bounce_timer,
                                        current_params.bounce_interval);
                        }
                }
        }
        /*printk("Bounce=%d, x=%d, y=%d, new_stroke=%d, debounced_down=%d\n",
                bounce, raw_x, raw_y, is_new_stroke, debounced_down);*/
 
        wake_readers();
 
 
#if 0   
 
        /* Obtain byte from pad and prime for next byte */
        {
                int value=inb_p(current_params.io);
                int handshake=inb_p(current_params.io+2);
                outb_p(handshake | 1, current_params.io+2);
                outb_p(handshake &~1, current_params.io+2);
                inb_p(0x64);
 
                raw_data[raw_data_count++]=value;
        }
 
        if(raw_data_count==3)
        {
                /* The pad provides triples of data. The first byte has
                 * 0x80=bit 8 X, 0x01=bit 7 X, 0x08=bit 8 Y, 0x01=still down
                 * The second byte is bits 0-6 X
                 * The third is bits 0-6 Y
                 */
                int new_down=raw_data[0]&0x01;
                int new_x=raw_data[1];
                int new_y=raw_data[2];
                if(raw_data[0]&0x10) new_x+=128;
                if(raw_data[0]&0x80) new_x+=256;
                if(raw_data[0]&0x08) new_y+=128;
 
                if( (raw_x!=new_x) || (raw_y!=new_y) )
                {
                        raw_x=new_x;
                        raw_y=new_y;
                        xy_pending=1;
                }
 
                if(new_down != raw_down)
                {
                        /* Down state has changed.  raw_down always holds
                         * the most recently observed state.
                         */
                        raw_down=new_down;
 
                        /* Forget any earlier bounce processing */
                        if(bounce)
                        {
                                del_timer(&bounce_timer);
                                bounce=NO_BOUNCE;
                        }
 
                        if(new_down)
                        {
                                if(debounced_down)
                                {
                                        /* pad gone down, but we were reporting
                                         * it down anyway because we suspected
                                         * (correctly) that the last up was just
                                         * a bounce
                                         */
                                        is_new_stroke=1;
                                }
                                else
                                {
                                        bounce=JUST_GONE_DOWN;
                                        set_timer_callback(&bounce_timer,
                                                current_params.bounce_interval);
                                        /* start new stroke/tap */
                                        debounced_down=new_down;
                                        notify_digi_up_down();
                                }
                        }
                        else /* just gone up */
                        {
                                if(recent_transition)
                                {
                                        /* early bounces are probably part of
                                         * a multi-tap gesture, so process
                                         * immediately
                                         */
                                        debounced_down=new_down;
                                        notify_digi_up_down();
                                }
                                else if(transition_count==3)
                                {
                                        /* give chance to move */
                                        bounce=STICKY_DRAG_UP;
                                        set_timer_callback(&bounce_timer,
                                                current_params.sticky_drag);
                                }
                                else
                                {
                                        /* don't trust it yet */
                                        bounce=JUST_GONE_UP;
                                        set_timer_callback(&bounce_timer,
                                                current_params.bounce_interval);
                                }
                        }
                }
                wake_readers();
                raw_data_count=0;
        }
#endif
}
 
 
static void read_raw_digi(int *down, int *debounced, int *stroke, int *x, int *y)
{
 
        /*disable_irq(current_params.irq);*/
        (*((volatile unsigned long*)0xFFFFF304)) |= (1<<20);   /* Enable interrupt */
        {
                *down=raw_down;
                *debounced=debounced_down;
                *stroke=is_new_stroke;
                *x=raw_x;
                *y=raw_y;
                xy_pending = 0;
                is_new_stroke = 0;
        }
        (*((volatile unsigned long*)0xFFFFF304)) &= ~(1<<20);   /* Enable interrupt */
        /*enable_irq(current_params.irq);*/
}
 
/*****************************************************************************/
/*
 * Filesystem interface
 */
 
/* Read returns byte triples, so we need to keep track of
 * how much of a triple has been read.  This is shared across
 * all processes which have this device open---not that anything
 * will make much sense in that case.
 */
static int read_bytes[3];
static int read_byte_count=0;
 
 
static void sample_rare(int d[3])
{
        int thisd, thisdd, thiss, thisx, thisy;
 
        read_raw_digi(&thisd, &thisdd, &thiss, &thisx, &thisy);
 
        d[0]=(thisd?0x80:0)
           | (thisx/256)<<4
           | (thisdd?0x08:0)
           | (thisy/256)
        ;
        d[1]=thisx%256;
        d[2]=thisy%256;
}
 
 
static void sample_debug(int d[3])
{
        int thisd, thisdd, thiss, thisx, thisy;
        int b;
        cli();
        read_raw_digi(&thisd, &thisdd, &thiss, &thisx, &thisy);
        d[0]=(thisd?0x80:0) | (thisdd?0x40:0) | (thiss?0x20:0) | bounce;
        d[1]=(recent_transition?0x80:0)+transition_count;
        read_button(&b);
        d[2]=(synthesize_tap<<4) | (b?0x01:0);
        sti();
}
 
 
static void sample_ps2(int d[3])
{
        static int lastx, lasty;
 
        int thisd, thisdd, thiss, thisx, thisy;
        int dx, dy, b;
 
        /*
         * Obtain the current mouse parameters and limit as appropriate for
         * the return data format.  Interrupts are only disabled while
         * obtaining the parameters, NOT during the puts_fs_byte() calls,
         * so paging in put_user() does not affect mouse tracking.
         */
        read_raw_digi(&thisd, &thisdd, &thiss, &thisx, &thisy);
        read_button(&b);
 
        /* Now compare with previous readings. */
        if( thiss /* new stroke */
         || (bounce!=NO_BOUNCE) )
        {
                dx=0;
                dy=0;
        }
        else
        {
                dx = (thisx-lastx);
                dy = -(thisy-lasty);
        }
        lastx=thisx;
        lasty=thisy;
 
        d[0]= ((dy<0)?0x20:0)
            | ((dx<0)?0x10:0)
            | (b? 0x00:0x08)
        ;
        d[1]=dx;
        d[2]=dy;
}
 
 
 
static int fasync_digi(struct inode *inode, struct file *filp, int on)
{
        int retval;
 
        retval = fasync_helper(inode, filp, on, &asyncptr);
        if (retval < 0)
                return retval;
        return 0;
}
 
 
/*
 * close access to the pad
 */
static void close_digi(struct inode * inode, struct file * file)
{
        fasync_digi(inode, file, 0);
        if (--active)
                return;
 
        (*((volatile unsigned long*)0xFFFFF304)) |= (1<<20);   /* Enable interrupt */
#if 0
        outb(0x30, current_params.io+2);        /* switch off digitiser */
#endif
        MOD_DEC_USE_COUNT;
}
 
 
/*
 * open access to the pad
 */
static int open_digi(struct inode * inode, struct file * file)
{
        if (active++)
                return 0;
        MOD_INC_USE_COUNT;
 
#if 0
        cli();
        outb(0x30, current_params.io+2);        /* switch off digitiser */
        pad_irq(0,0,0);            /* read to flush any pending bytes */
        pad_irq(0,0,0);            /* read to flush any pending bytes */
        pad_irq(0,0,0);            /* read to flush any pending bytes */
        outb(0x38, current_params.io+2);        /* switch on digitiser */
        current_params = default_params;
        raw_data_count=0;                /* re-sync input byte counter */
        read_byte_count=0;               /* re-sync output byte counter */
        button_pending=0;
        recent_transition=0;
        transition_count=0;
        synthesize_tap=0;
        del_timer(&bounce_timer);
        del_timer(&tap_timer);
        sti();
#endif
 
        cli();
        current_params = default_params;
        raw_data_count=0;                /* re-sync input byte counter */
        read_byte_count=0;               /* re-sync output byte counter */
        button_pending=0;
        recent_transition=0;
        transition_count=0;
        synthesize_tap=0;
        del_timer(&bounce_timer);
        del_timer(&tap_timer);
        sti();
 
        return 0;
}
 
 
/*
 * writes are disallowed
 */
static int write_digi(struct inode * inode, struct file * file, const char * buffer, int count)
{
        return -EINVAL;
}
 
 
void new_sample(int d[3])
{
        switch(current_params.mode)
        {
                case MC68328DIGI_RARE:  sample_rare(d);         break;
                case MC68328DIGI_DEBUG: sample_debug(d);        break;
                case MC68328DIGI_PS2:   sample_ps2(d);          break;
        }
}
 
 
/*
 * Read pad data.  Currently never blocks.
 */
static int read_digi(struct inode * inode, struct file * file, char * buffer, int count)
{
        int r;
 
        if ((r = verify_area(VERIFY_WRITE, buffer, count)))
                return r;
 
        for(r=0; r<count; r++)
        {
                if(!read_byte_count)
                        new_sample(read_bytes);
                put_user(read_bytes[read_byte_count], buffer+r);
                read_byte_count = (read_byte_count+1)%3;
        }
        return r;
}
 
 
/*
 * select for pad input
 */
static int pad_select(struct inode *inode, struct file *file, int sel_type, select_table * wait)
{
        if(sel_type == SEL_IN) {
                if(button_pending || xy_pending)
                        return 1;
                select_wait(&queue, wait);
        }
        return 0;
}
 
 
static int pad_ioctl(struct inode *inode, struct file * file,
        unsigned int cmd, unsigned long arg)
{
        int i;
        struct mc68328digi_params new;
 
        if (!inode)
                return -EINVAL;
 
        switch (cmd) {
        case MC68328DIGIIOCGETP:
                printk("pad_ioctl: get %d\n",current_params.mode);
                i = verify_area(VERIFY_WRITE, (void *)arg, sizeof(new));
                if(i) return i;
                new = current_params;
                memcpy_tofs((void *)arg, &new, sizeof(new));
                return 0;
 
        case MC68328DIGIIOCSETP:
                printk("pad_ioctl: set, was %d",current_params.mode);
                i = verify_area(VERIFY_READ, (void *)arg, sizeof(new));
                if (i) return i;
                memcpy_fromfs(&new, (void *)arg, sizeof(new));
 
                if( (new.mode<MC68328DIGI_RARE)
                 || (new.mode>MC68328DIGI_PS2)
                 || (new.bounce_interval<0)
                 || (new.sticky_drag<0)
                 || (new.tap_interval<0)
                )
                        return -EINVAL;
 
                current_params.mode     = new.mode;
                current_params.bounce_interval  = new.bounce_interval;
                current_params.sticky_drag      = new.sticky_drag;
                current_params.tap_interval     = new.tap_interval;
                printk("now %d\n",current_params.mode);
                return 0;
        }
        return -ENOIOCTLCMD;
}
 
 
static struct file_operations pad_fops = {
        NULL,           /* pad_seek */
        read_digi,
        write_digi,
        NULL,           /* pad_readdir */
        pad_select,
        pad_ioctl,
        NULL,           /* pad_mmap */
        open_digi,
        close_digi,
        NULL,
        fasync_digi,
};
 
 
static struct miscdevice mc68328_digi = {
        MC68328DIGI_MINOR, "mc68328 digitizer", &pad_fops
};
 
 
int mc68328digi_init(void)
{
        current_params = default_params;
        raw_data_count=0;                /* re-sync input byte counter */
        read_byte_count=0;               /* re-sync output byte counter */
        button_pending=0;
        recent_transition=0;
        transition_count=0;
        synthesize_tap=0;
        del_timer(&bounce_timer);
        del_timer(&tap_timer);
 
 
        /*if(request_irq(current_params.irq, pad_irq, 0, "mc68328digi", 0))
        {
                printk("mc68328digi: Unable to get IRQ.\n");
                return -EBUSY;
        }
        if(check_region(current_params.io, 4))
        {
                printk("mc68328digi: I/O area in use.\n");
                free_irq(current_params.irq,0);
                return -EBUSY;
        }
        request_region(current_params.io, 4, "mc68328digi");
        printk("PC110 digitizer pad at 0x%X, irq %d.\n",
                current_params.io,current_params.irq);*/
 
        if (request_irq(IRQ_MACHSPEC | PEN_IRQ_NUM,
                        digi_interrupt,
                        IRQ_FLG_STD,
                        "M68328 Digitizer", NULL))
                panic("Unable to attach 68328 digitizer interrupt\n");
 
        printk("MC68328 digitizer.\n");
        misc_register(&mc68328_digi);
 
        (*(volatile unsigned char*)0xFFFFF42B) = 0xFF; /*Setting PFSEL byte to ff*/
        (*(volatile unsigned char*)0xFFFFF428) = 0xFF; /*Setting PFDIR byte to ff*/
        (*(volatile unsigned char*)0xFFFFF42A) = 0x00; /*Setting PFPUEN byte to 0*/
 
        (*(volatile unsigned char*)0xFFFFF429) = 0xc5; /*Setting PFDATA byte to c5*/
        (*(volatile unsigned char*)0xFFFFF429) = 0xd5; /*Setting PFDATA byte to d5*/
        (*(volatile unsigned char*)0xFFFFF448) = 0x50; /*Setting PMDIR byte to 50*/
        (*(volatile unsigned char*)0xFFFFF449) = 0x00; /*Setting PMDATA byte to 0*/
        (*(volatile unsigned char*)0xFFFFF44B) = 0xd0; /*Setting PMSEL byte to d0*/
        (*(volatile unsigned char*)0xFFFFF429) = 0xd5; /*Setting PFDATA byte to d5*/
#if 0
        (*(volatile unsigned char*)0xFFFFF431) = 0x60; /*Setting PGDATA byte to 60*/
#endif
        (*(volatile unsigned short*)0xFFFFF802) = 0x427f; /*Setting SPIMCONT word to 427f*/
        (*(volatile unsigned short*)0xFFFFF800) = 0xffff; /*Setting SPIMDATA word to ffff*/
        (*(volatile unsigned char*)0xFFFFF429) = 0x55; /*Setting PFDATA byte to 55*/
        (*(volatile unsigned short*)0xFFFFF802) = 0x427f; /*Setting SPIMCONT word to 427f*/
        (*(volatile unsigned short*)0xFFFFF802) = 0x437f; /*Setting SPIMCONT word to 437f*/
        (void)(*(volatile unsigned short*)0xFFFFF800); /*Returning word from SPIMDATA ffff*/
        (*(volatile unsigned char*)0xFFFFF429) = 0xd5; /*Setting PFDATA byte to d5*/
        (*(volatile unsigned short*)0xFFFFF802) = 0x407f; /*Setting SPIMCONT word to 407f*/
#if 0
        (*(volatile unsigned char*)0xFFFFF431) = 0x70; /*Setting PGDATA byte to 70*/
#endif
        (*(volatile unsigned char*)0xFFFFF448) = 0x50; /*Setting PMDIR byte to 50*/
        (*(volatile unsigned char*)0xFFFFF449) = 0x00; /*Setting PMDATA byte to 0*/
        (*(volatile unsigned char*)0xFFFFF44A) = 0xED; /* Port M Pullups (dangerous?) */
        (*(volatile unsigned char*)0xFFFFF44B) = 0xd0; /*Setting PMSEL byte to d0*/
        (*(volatile unsigned char*)0xFFFFF429) = 0xd5; /*Setting PFDATA byte to d5*/
        (*(volatile unsigned char*)0xFFFFF429) = 0xdd; /*Setting PFDATA byte to dd*/
 
 
        (*((volatile unsigned long*)0xFFFFF304)) &= ~(1<<20);   /* Enable interrupt */
        (*(volatile unsigned char*)0xFFFFF44A) |= 64; /* Turn on Port M Pen IRQ pullup */
        (*(volatile unsigned char*)0xFFFFF44B) &= ~64;  /* Switch off Port M Pen IRQ select */
 
        /*outb(0x30, current_params.io+2);*/    /* switch off digitiser */
 
        return 0;
}
 
 
static void mc68328digi_unload(void)
{
#if 0
        outb(0x30, current_params.io+2);        /* switch off digitiser */
#endif
        /*if(current_params.irq)
                free_irq(current_params.irq, 0);
        current_params.irq=0;
        release_region(current_params.io, 4);*/
        misc_deregister(&mc68328_digi);
}
 
 
int init_module(void)
{
        return mc68328digi_init();
}
 
void cleanup_module(void)
{
        mc68328digi_unload();
}
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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [char/] [mc68328digi.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	199	simons	`/* mc68328digi.c`
2			`*`
3			`* Linux driver to make the PalmPilot's touchpad behave`
4			`* like a PS/2 mouse.`
5			`*`
6			`* My apologies, this is currently a complete mess. It'll notice taps`
7			`* on Copilot and a real Pilot, but can't figure out the coordinates on the Pilot.`
8			`*`
9			`* Based on touchpad driver.`
10			`* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>,`
11			`* The Silver Hammer Group, Ltd.`
12			`*`
13			`* Original History`
14			`* -------`
15			`* 0.0 1997-05-16 Alan Cox <alan@cymru.net> - Pad reader`
16			`* 0.1 1997-05-19 Robin O'Leary <robin@acm.org> - PS/2 emulation`
17			`* 0.2 1997-06-03 Robin O'Leary <robin@acm.org> - tap gesture`
18			`* 0.3 1997-07-10 Robin O'Leary <robin@acm.org> - sticky drag`
19			`*`
20			`* Distribution`
21			`* ------------`
22			`* Copyright (C) 1997-06-18 Robin O'Leary <robin@acm.org> All rights reserved.`
23			`* This program is free software; you can redistribute it and/or modify`
24			`* it under the terms of the GNU General Public License as published by`
25			`* the Free Software Foundation; either version 2 of the License, or`
26			`* (at your option) any later version.`
27			`*`
28			`* Get the latest version from ftp://swan.ml.org/pub/pc110/`
29			`*/`
30
31			`#include <linux/config.h>`
32			`#include <linux/module.h>`
33			`#include <linux/delay.h>`
34			`#include <linux/kernel.h>`
35			`#include <linux/busmouse.h>`
36			`#include <linux/signal.h>`
37			`#include <linux/errno.h>`
38			`#include <linux/mm.h>`
39			`#include <linux/miscdevice.h>`
40			`#include <linux/ptrace.h>`