Subversion Repositories or1k

/*

 * Macintosh ADB Mouse driver for Linux

 *

 * 27 Oct 1997 Michael Schmitz

 * logitech fixes by anthony tong

 * further hacking by Paul Mackerras

 *

 * Apple mouse protocol according to:

 *

 * Device code shamelessly stolen from:

 */

/*

 * Atari Mouse Driver for Linux

 * by Robert de Vries (robert@and.nl) 19Jul93

 *

 * 16 Nov 1994 Andreas Schwab

 * Compatibility with busmouse

 * Support for three button mouse (shamelessly stolen from MiNT)

 * third button wired to one of the joystick directions on joystick 1

 *

 * 1996/02/11 Andreas Schwab

 * Module support

 * Allow multiple open's

 *

 * Converted to use new generic busmouse code.  11 July 1998

 *   Russell King <rmk@arm.uk.linux.org>

 */

#include <linux/module.h>

#include <linux/sched.h>

#include <linux/errno.h>

#include <linux/miscdevice.h>

#include <linux/mm.h>

#include <linux/random.h>

#include <linux/poll.h>

#include <linux/init.h>

#include <linux/adb_mouse.h>

#ifdef __powerpc__

#include <asm/processor.h>

#endif

#if defined(__mc68000__) || defined(MODULE)

#include <asm/setup.h>

#endif

#include "busmouse.h"

static int msedev;

static unsigned char adb_mouse_buttons[16];

extern void (*adb_mouse_interrupt_hook)(unsigned char *, int);

extern int adb_emulate_buttons;

extern int adb_button2_keycode;

extern int adb_button3_keycode;

/*

 *    XXX: need to figure out what ADB mouse packets mean ...

 *      This is the stuff stolen from the Atari driver ...

 */

static void adb_mouse_interrupt(unsigned char *buf, int nb)

{

        int buttons, id;

        char dx, dy;

        /*

           Handler 1 -- 100cpi original Apple mouse protocol.

           Handler 2 -- 200cpi original Apple mouse protocol.

           For Apple's standard one-button mouse protocol the data array will

           contain the following values:

                       BITS    COMMENTS

           data[0] = dddd 1100 ADB command: Talk, register 0, for device dddd.

           data[1] = bxxx xxxx First button and x-axis motion.

           data[2] = byyy yyyy Second button and y-axis motion.

           Handler 4 -- Apple Extended mouse protocol.

           For Apple's 3-button mouse protocol the data array will contain the

           following values:

                       BITS    COMMENTS

           data[0] = dddd 1100 ADB command: Talk, register 0, for device dddd.

           data[1] = bxxx xxxx Left button and x-axis motion.

           data[2] = byyy yyyy Second button and y-axis motion.

           data[3] = byyy bxxx Third button and fourth button.

                   Y is additiona. high bits of y-axis motion.

                   X is additional high bits of x-axis motion.

           'buttons' here means 'button down' states!

           Button 1 (left)  : bit 2, busmouse button 3

           Button 2 (right) : bit 0, busmouse button 1

           Button 3 (middle): bit 1, busmouse button 2

         */

        /* x/y and buttons swapped */

        id = (buf[0] >> 4) & 0xf;

        buttons = adb_mouse_buttons[id];

        /* button 1 (left, bit 2) */

        buttons = (buttons & 3) | (buf[1] & 0x80 ? 4 : 0); /* 1+2 unchanged */

        /* button 2 (middle) */

        buttons = (buttons & 5) | (buf[2] & 0x80 ? 2 : 0); /* 2+3 unchanged */

        /* button 3 (right) present?

         *  on a logitech mouseman, the right and mid buttons sometimes behave

         *  strangely until they both have been pressed after booting. */

        /* data valid only if extended mouse format ! */

        if (nb >= 4)

                buttons = (buttons & 6) | (buf[3] & 0x80 ? 1 : 0); /* 1+3 unchanged */

        adb_mouse_buttons[id] = buttons;

        /* a button is down if it is down on any mouse */

        for (id = 0; id < 16; ++id)

                buttons &= adb_mouse_buttons[id];

        dx = ((buf[2] & 0x7f) < 64 ? (buf[2] & 0x7f) : (buf[2] & 0x7f) - 128);

        dy = ((buf[1] & 0x7f) < 64 ? (buf[1] & 0x7f) : (buf[1] & 0x7f) - 128);

        busmouse_add_movementbuttons(msedev, dx, -dy, buttons);

        if (console_loglevel >= 8)

                printk(" %X %X %X dx %d dy %d \n",

                       buf[1], buf[2], buf[3], dx, dy);

}

static int release_mouse(struct inode *inode, struct file *file)

{

        adb_mouse_interrupt_hook = NULL;

        /*

         *      FIXME?: adb_mouse_interrupt_hook may still be executing

         *      on another CPU.

         */

        return 0;

}

static int open_mouse(struct inode *inode, struct file *file)

{

        adb_mouse_interrupt_hook = adb_mouse_interrupt;

        return 0;

}

static struct busmouse adb_mouse =

{

        ADB_MOUSE_MINOR, "adbmouse", THIS_MODULE, open_mouse, release_mouse, 7

};

static int __init adb_mouse_init(void)

{

#ifdef __powerpc__

        if ((_machine != _MACH_chrp) && (_machine != _MACH_Pmac))

                return -ENODEV;

#endif

#ifdef __mc68000__

        if (!MACH_IS_MAC)

                return -ENODEV;

#endif

        /* all buttons up */

        memset(adb_mouse_buttons, 7, sizeof(adb_mouse_buttons));

        msedev = register_busmouse(&adb_mouse);

        if (msedev < 0)

                printk(KERN_WARNING "Unable to register ADB mouse driver.\n");

        else

                printk(KERN_INFO "Macintosh ADB mouse driver installed.\n");

        return msedev < 0 ? msedev : 0;

}

#ifndef MODULE

/*

 * XXX this function is misnamed.

 * It is called if the kernel is booted with the adb_buttons=xxx

 * option, which is about using ADB keyboard buttons to emulate

 * mouse buttons. -- paulus

 */

static int __init adb_mouse_setup(char *str)

{

        int ints[4];

        str = get_options(str, ARRAY_SIZE(ints), ints);

        if (ints[0] >= 1) {

                adb_emulate_buttons = ints[1];

                if (ints[0] >= 2)

                        adb_button2_keycode = ints[2];

                if (ints[0] >= 3)

                        adb_button3_keycode = ints[3];

        }

        return 1;

}

__setup("adb_buttons=", adb_mouse_setup);

#endif /* !MODULE */

static void __exit adb_mouse_cleanup(void)

{

        unregister_busmouse(msedev);

}

module_init(adb_mouse_init);

module_exit(adb_mouse_cleanup);

MODULE_LICENSE("GPL");