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0537c8eef4
As described in the added code comment, a reference to .exit.text is ok for drivers registered via module_platform_driver_probe(). Make this explicit to prevent the following section mismatch warning WARNING: modpost: drivers/input/mouse/amimouse: section mismatch in reference: amimouse_driver+0x8 (section: .data) -> amimouse_remove (section: .exit.text) that triggers on an allmodconfig W=1 build. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/2e3783106bf6bd9a7bdeb12b706378fb16316471.1711748999.git.u.kleine-koenig@pengutronix.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Amiga mouse driver for Linux/m68k
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*
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* Copyright (c) 2000-2002 Vojtech Pavlik
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*
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* Based on the work of:
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* Michael Rausch James Banks
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* Matther Dillon David Giller
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* Nathan Laredo Linus Torvalds
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* Johan Myreen Jes Sorensen
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* Russell King
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <asm/irq.h>
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#include <asm/setup.h>
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#include <linux/uaccess.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Amiga mouse driver");
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MODULE_LICENSE("GPL");
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static int amimouse_lastx, amimouse_lasty;
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static irqreturn_t amimouse_interrupt(int irq, void *data)
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{
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struct input_dev *dev = data;
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unsigned short joy0dat, potgor;
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int nx, ny, dx, dy;
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joy0dat = amiga_custom.joy0dat;
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nx = joy0dat & 0xff;
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ny = joy0dat >> 8;
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dx = nx - amimouse_lastx;
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dy = ny - amimouse_lasty;
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if (dx < -127) dx = (256 + nx) - amimouse_lastx;
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if (dx > 127) dx = (nx - 256) - amimouse_lastx;
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if (dy < -127) dy = (256 + ny) - amimouse_lasty;
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if (dy > 127) dy = (ny - 256) - amimouse_lasty;
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amimouse_lastx = nx;
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amimouse_lasty = ny;
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potgor = amiga_custom.potgor;
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input_report_rel(dev, REL_X, dx);
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input_report_rel(dev, REL_Y, dy);
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input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40);
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input_report_key(dev, BTN_MIDDLE, potgor & 0x0100);
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input_report_key(dev, BTN_RIGHT, potgor & 0x0400);
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input_sync(dev);
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return IRQ_HANDLED;
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}
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static int amimouse_open(struct input_dev *dev)
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{
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unsigned short joy0dat;
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int error;
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joy0dat = amiga_custom.joy0dat;
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amimouse_lastx = joy0dat & 0xff;
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amimouse_lasty = joy0dat >> 8;
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error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse",
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dev);
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if (error)
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dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB);
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return error;
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}
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static void amimouse_close(struct input_dev *dev)
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{
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free_irq(IRQ_AMIGA_VERTB, dev);
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}
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static int __init amimouse_probe(struct platform_device *pdev)
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{
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int err;
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struct input_dev *dev;
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dev = input_allocate_device();
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if (!dev)
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return -ENOMEM;
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dev->name = pdev->name;
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dev->phys = "amimouse/input0";
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dev->id.bustype = BUS_AMIGA;
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dev->id.vendor = 0x0001;
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dev->id.product = 0x0002;
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dev->id.version = 0x0100;
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dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
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dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
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dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
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BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
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dev->open = amimouse_open;
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dev->close = amimouse_close;
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dev->dev.parent = &pdev->dev;
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err = input_register_device(dev);
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if (err) {
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input_free_device(dev);
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return err;
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}
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platform_set_drvdata(pdev, dev);
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return 0;
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}
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static void __exit amimouse_remove(struct platform_device *pdev)
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{
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struct input_dev *dev = platform_get_drvdata(pdev);
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input_unregister_device(dev);
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}
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/*
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* amimouse_remove() lives in .exit.text. For drivers registered via
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* module_platform_driver_probe() this is ok because they cannot get unbound at
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* runtime. So mark the driver struct with __refdata to prevent modpost
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* triggering a section mismatch warning.
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*/
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static struct platform_driver amimouse_driver __refdata = {
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.remove_new = __exit_p(amimouse_remove),
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.driver = {
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.name = "amiga-mouse",
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},
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};
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module_platform_driver_probe(amimouse_driver, amimouse_probe);
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MODULE_ALIAS("platform:amiga-mouse");
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