diff options
Diffstat (limited to 'drivers/input/mouse/amimouse.c')
| -rw-r--r-- | drivers/input/mouse/amimouse.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/input/mouse/amimouse.c b/drivers/input/mouse/amimouse.c new file mode 100644 index 0000000000..a50e503548 --- /dev/null +++ b/drivers/input/mouse/amimouse.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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 + */ + + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> + +#include <asm/irq.h> +#include <asm/setup.h> +#include <linux/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 irqreturn_t amimouse_interrupt(int irq, void *data) +{ + struct input_dev *dev = data; + 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(dev, REL_X, dx); + input_report_rel(dev, REL_Y, dy); + + input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40); + input_report_key(dev, BTN_MIDDLE, potgor & 0x0100); + input_report_key(dev, BTN_RIGHT, potgor & 0x0400); + + input_sync(dev); + + return IRQ_HANDLED; +} + +static int amimouse_open(struct input_dev *dev) +{ + unsigned short joy0dat; + int error; + + joy0dat = amiga_custom.joy0dat; + + amimouse_lastx = joy0dat & 0xff; + amimouse_lasty = joy0dat >> 8; + + error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", + dev); + if (error) + dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB); + + return error; +} + +static void amimouse_close(struct input_dev *dev) +{ + free_irq(IRQ_AMIGA_VERTB, dev); +} + +static int __init amimouse_probe(struct platform_device *pdev) +{ + int err; + struct input_dev *dev; + + dev = input_allocate_device(); + if (!dev) + return -ENOMEM; + + dev->name = pdev->name; + dev->phys = "amimouse/input0"; + dev->id.bustype = BUS_AMIGA; + dev->id.vendor = 0x0001; + dev->id.product = 0x0002; + dev->id.version = 0x0100; + + dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); + dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); + dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | + BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); + dev->open = amimouse_open; + dev->close = amimouse_close; + dev->dev.parent = &pdev->dev; + + err = input_register_device(dev); + if (err) { + input_free_device(dev); + return err; + } + + platform_set_drvdata(pdev, dev); + + return 0; +} + +static int __exit amimouse_remove(struct platform_device *pdev) +{ + struct input_dev *dev = platform_get_drvdata(pdev); + + input_unregister_device(dev); + return 0; +} + +static struct platform_driver amimouse_driver = { + .remove = __exit_p(amimouse_remove), + .driver = { + .name = "amiga-mouse", + }, +}; + +module_platform_driver_probe(amimouse_driver, amimouse_probe); + +MODULE_ALIAS("platform:amiga-mouse"); |