diff options
Diffstat (limited to 'drivers/input/mouse/amimouse.c')
-rw-r--r-- | drivers/input/mouse/amimouse.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/input/mouse/amimouse.c b/drivers/input/mouse/amimouse.c new file mode 100644 index 0000000..a185ac7 --- /dev/null +++ b/drivers/input/mouse/amimouse.c @@ -0,0 +1,136 @@ +/* + * Amiga mouse driver for Linux/m68k + * + * Copyright (c) 2000-2002 Vojtech Pavlik + * + * Based on the work of: + * Michael Rausch James Banks + * Matther Dillon David Giller + * Nathan Laredo Linus Torvalds + * Johan Myreen Jes Sorensen + * Russell King + */ + +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> + +#include <asm/irq.h> +#include <asm/setup.h> +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/amigahw.h> +#include <asm/amigaints.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION("Amiga mouse driver"); +MODULE_LICENSE("GPL"); + +static int amimouse_lastx, amimouse_lasty; +static struct input_dev *amimouse_dev; + +static irqreturn_t amimouse_interrupt(int irq, void *dummy) +{ + unsigned short joy0dat, potgor; + int nx, ny, dx, dy; + + joy0dat = amiga_custom.joy0dat; + + nx = joy0dat & 0xff; + ny = joy0dat >> 8; + + dx = nx - amimouse_lastx; + dy = ny - amimouse_lasty; + + if (dx < -127) dx = (256 + nx) - amimouse_lastx; + if (dx > 127) dx = (nx - 256) - amimouse_lastx; + if (dy < -127) dy = (256 + ny) - amimouse_lasty; + if (dy > 127) dy = (ny - 256) - amimouse_lasty; + + amimouse_lastx = nx; + amimouse_lasty = ny; + + potgor = amiga_custom.potgor; + + input_report_rel(amimouse_dev, REL_X, dx); + input_report_rel(amimouse_dev, REL_Y, dy); + + input_report_key(amimouse_dev, BTN_LEFT, ciaa.pra & 0x40); + input_report_key(amimouse_dev, BTN_MIDDLE, potgor & 0x0100); + input_report_key(amimouse_dev, BTN_RIGHT, potgor & 0x0400); + + input_sync(amimouse_dev); + + return IRQ_HANDLED; +} + +static int amimouse_open(struct input_dev *dev) +{ + unsigned short joy0dat; + + joy0dat = amiga_custom.joy0dat; + + amimouse_lastx = joy0dat & 0xff; + amimouse_lasty = joy0dat >> 8; + + if (request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", amimouse_interrupt)) { + printk(KERN_ERR "amimouse.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB); + return -EBUSY; + } + + return 0; +} + +static void amimouse_close(struct input_dev *dev) +{ + free_irq(IRQ_AMIGA_VERTB, amimouse_interrupt); +} + +static int __init amimouse_init(void) +{ + int err; + + if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_MOUSE)) + return -ENODEV; + + amimouse_dev = input_allocate_device(); + if (!amimouse_dev) + return -ENOMEM; + + amimouse_dev->name = "Amiga mouse"; + amimouse_dev->phys = "amimouse/input0"; + amimouse_dev->id.bustype = BUS_AMIGA; + amimouse_dev->id.vendor = 0x0001; + amimouse_dev->id.product = 0x0002; + amimouse_dev->id.version = 0x0100; + + amimouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); + amimouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); + amimouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | + BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); + amimouse_dev->open = amimouse_open; + amimouse_dev->close = amimouse_close; + + err = input_register_device(amimouse_dev); + if (err) { + input_free_device(amimouse_dev); + return err; + } + + return 0; +} + +static void __exit amimouse_exit(void) +{ + input_unregister_device(amimouse_dev); +} + +module_init(amimouse_init); +module_exit(amimouse_exit); |