/*
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/*
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* Atari Joystick Driver for Linux
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* Atari Joystick Driver for Linux
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* by Robert de Vries (robert@and.nl) 19Jul93
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* by Robert de Vries (robert@and.nl) 19Jul93
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*
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*
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* 16 Nov 1994 Andreas Schwab
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* 16 Nov 1994 Andreas Schwab
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* Support for three button mouse (shamelessly stolen from MiNT)
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* Support for three button mouse (shamelessly stolen from MiNT)
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* third button wired to one of the joystick directions on joystick 1
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* third button wired to one of the joystick directions on joystick 1
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*/
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*/
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/major.h>
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#include <linux/major.h>
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#include <asm/atarikb.h>
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#include <asm/atarikb.h>
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#include <asm/atari_joystick.h>
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#include <asm/atari_joystick.h>
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#include <asm/atari_mouse.h>
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#include <asm/atari_mouse.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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#define MAJOR_NR JOYSTICK_MAJOR
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#define MAJOR_NR JOYSTICK_MAJOR
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#define ANALOG_JOY(n) (!(n & 0x80))
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#define ANALOG_JOY(n) (!(n & 0x80))
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#define DIGITAL_JOY(n) (n & 0x80)
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#define DIGITAL_JOY(n) (n & 0x80)
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#define DEVICE_NR(n) (MINOR(n) & 0x7f)
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#define DEVICE_NR(n) (MINOR(n) & 0x7f)
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static struct joystick_status joystick[2];
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static struct joystick_status joystick[2];
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int atari_mouse_buttons; /* for three-button mouse */
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int atari_mouse_buttons; /* for three-button mouse */
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void atari_joystick_interrupt(char *buf)
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void atari_joystick_interrupt(char *buf)
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{
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{
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int j;
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int j;
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/* ikbd_joystick_disable(); */
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/* ikbd_joystick_disable(); */
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j = buf[0] & 0x1;
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j = buf[0] & 0x1;
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joystick[j].dir = buf[1] & 0xF;
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joystick[j].dir = buf[1] & 0xF;
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joystick[j].fire = (buf[1] & 0x80) >> 7;
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joystick[j].fire = (buf[1] & 0x80) >> 7;
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joystick[j].ready = 1;
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joystick[j].ready = 1;
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wake_up_interruptible(&joystick[j].wait);
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wake_up_interruptible(&joystick[j].wait);
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/* For three-button mouse emulation fake a mouse packet */
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/* For three-button mouse emulation fake a mouse packet */
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if (atari_mouse_interrupt_hook &&
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if (atari_mouse_interrupt_hook &&
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j == 1 && (buf[1] & 1) != ((atari_mouse_buttons & 2) >> 1))
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j == 1 && (buf[1] & 1) != ((atari_mouse_buttons & 2) >> 1))
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{
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{
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char faked_packet[3];
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char faked_packet[3];
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atari_mouse_buttons = (atari_mouse_buttons & 5) | ((buf[1] & 1) << 1);
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atari_mouse_buttons = (atari_mouse_buttons & 5) | ((buf[1] & 1) << 1);
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faked_packet[0] = (atari_mouse_buttons & 1) |
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faked_packet[0] = (atari_mouse_buttons & 1) |
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(atari_mouse_buttons & 4 ? 2 : 0);
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(atari_mouse_buttons & 4 ? 2 : 0);
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faked_packet[1] = 0;
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faked_packet[1] = 0;
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faked_packet[2] = 0;
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faked_packet[2] = 0;
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atari_mouse_interrupt_hook (faked_packet);
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atari_mouse_interrupt_hook (faked_packet);
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}
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}
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/* ikbd_joystick_event_on(); */
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/* ikbd_joystick_event_on(); */
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}
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}
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static void release_joystick(struct inode *inode, struct file *file)
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static void release_joystick(struct inode *inode, struct file *file)
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{
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{
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int minor = DEVICE_NR(inode->i_rdev);
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int minor = DEVICE_NR(inode->i_rdev);
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joystick[minor].active = 0;
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joystick[minor].active = 0;
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joystick[minor].ready = 0;
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joystick[minor].ready = 0;
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if ((joystick[0].active == 0) && (joystick[1].active == 0))
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if ((joystick[0].active == 0) && (joystick[1].active == 0))
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ikbd_joystick_disable();
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ikbd_joystick_disable();
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}
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}
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static int open_joystick(struct inode *inode, struct file *file)
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static int open_joystick(struct inode *inode, struct file *file)
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{
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{
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int minor = DEVICE_NR(inode->i_rdev);
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int minor = DEVICE_NR(inode->i_rdev);
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if (!DIGITAL_JOY(inode->i_rdev) || minor > 1)
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if (!DIGITAL_JOY(inode->i_rdev) || minor > 1)
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return -ENODEV;
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return -ENODEV;
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if (joystick[minor].active)
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if (joystick[minor].active)
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return -EBUSY;
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return -EBUSY;
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joystick[minor].active = 1;
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joystick[minor].active = 1;
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joystick[minor].ready = 0;
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joystick[minor].ready = 0;
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ikbd_joystick_event_on();
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ikbd_joystick_event_on();
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return 0;
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return 0;
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}
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}
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static int write_joystick(struct inode *inode, struct file *file,
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static int write_joystick(struct inode *inode, struct file *file,
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const char *buffer, int count)
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const char *buffer, int count)
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{
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{
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return -EINVAL;
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return -EINVAL;
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}
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}
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static int read_joystick(struct inode *inode, struct file *file,
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static int read_joystick(struct inode *inode, struct file *file,
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char *buffer, int count)
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char *buffer, int count)
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{
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{
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int minor = DEVICE_NR(inode->i_rdev);
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int minor = DEVICE_NR(inode->i_rdev);
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int i;
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int i;
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if (count < 2)
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if (count < 2)
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return -EINVAL;
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return -EINVAL;
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if (!joystick[minor].ready)
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if (!joystick[minor].ready)
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return -EAGAIN;
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return -EAGAIN;
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put_user(joystick[minor].fire, buffer++);
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put_user(joystick[minor].fire, buffer++);
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put_user(joystick[minor].dir, buffer++);
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put_user(joystick[minor].dir, buffer++);
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for (i = 0; i < count; i++)
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for (i = 0; i < count; i++)
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put_user(0, buffer++);
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put_user(0, buffer++);
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joystick[minor].ready = 0;
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joystick[minor].ready = 0;
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return i;
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return i;
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}
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}
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static int joystick_select(struct inode *inode, struct file *file, int sel_type, select_table *wait)
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static int joystick_select(struct inode *inode, struct file *file, int sel_type, select_table *wait)
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{
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{
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int minor = DEVICE_NR(inode->i_rdev);
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int minor = DEVICE_NR(inode->i_rdev);
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if (sel_type != SEL_IN)
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if (sel_type != SEL_IN)
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return 0;
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return 0;
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if (joystick[minor].ready)
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if (joystick[minor].ready)
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return 1;
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return 1;
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select_wait(&joystick[minor].wait, wait);
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select_wait(&joystick[minor].wait, wait);
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return 0;
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return 0;
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}
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}
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struct file_operations atari_joystick_fops = {
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struct file_operations atari_joystick_fops = {
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NULL, /* joystick_seek */
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NULL, /* joystick_seek */
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read_joystick,
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read_joystick,
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write_joystick,
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write_joystick,
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NULL, /* joystick_readdir */
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NULL, /* joystick_readdir */
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joystick_select,
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joystick_select,
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NULL, /* joystick_ioctl */
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NULL, /* joystick_ioctl */
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NULL, /* joystick_mmap */
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NULL, /* joystick_mmap */
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open_joystick,
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open_joystick,
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release_joystick
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release_joystick
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};
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};
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int atari_joystick_init(void)
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int atari_joystick_init(void)
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{
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{
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joystick[0].active = joystick[1].active = 0;
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joystick[0].active = joystick[1].active = 0;
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joystick[0].ready = joystick[1].ready = 0;
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joystick[0].ready = joystick[1].ready = 0;
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joystick[0].wait = joystick[1].wait = NULL;
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joystick[0].wait = joystick[1].wait = NULL;
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if (register_chrdev(MAJOR_NR, "joystick", &atari_joystick_fops))
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if (register_chrdev(MAJOR_NR, "joystick", &atari_joystick_fops))
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printk("unable to get major %d for joystick devices\n", MAJOR_NR);
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printk("unable to get major %d for joystick devices\n", MAJOR_NR);
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return 0;
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return 0;
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}
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}
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