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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | // SPDX-License-Identifier: GPL-2.0-only /* * Acorn RiscPC mouse driver for Linux/ARM * * Copyright (c) 2000-2002 Vojtech Pavlik * Copyright (C) 1996-2002 Russell King */ /* * * This handles the Acorn RiscPCs mouse. We basically have a couple of * hardware registers that track the sensor count for the X-Y movement and * another register holding the button state. On every VSYNC interrupt we read * the complete state and then work out if something has changed. */ #include <linux/module.h> #include <linux/ptrace.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/input.h> #include <linux/io.h> #include <mach/hardware.h> #include <asm/irq.h> #include <asm/hardware/iomd.h> MODULE_AUTHOR("Vojtech Pavlik, Russell King"); MODULE_DESCRIPTION("Acorn RiscPC mouse driver"); MODULE_LICENSE("GPL"); static short rpcmouse_lastx, rpcmouse_lasty; static struct input_dev *rpcmouse_dev; static irqreturn_t rpcmouse_irq(int irq, void *dev_id) { struct input_dev *dev = dev_id; short x, y, dx, dy, b; x = (short) iomd_readl(IOMD_MOUSEX); y = (short) iomd_readl(IOMD_MOUSEY); b = (short) (__raw_readl(IOMEM(0xe0310000)) ^ 0x70); dx = x - rpcmouse_lastx; dy = y - rpcmouse_lasty; rpcmouse_lastx = x; rpcmouse_lasty = y; input_report_rel(dev, REL_X, dx); input_report_rel(dev, REL_Y, -dy); input_report_key(dev, BTN_LEFT, b & 0x40); input_report_key(dev, BTN_MIDDLE, b & 0x20); input_report_key(dev, BTN_RIGHT, b & 0x10); input_sync(dev); return IRQ_HANDLED; } static int __init rpcmouse_init(void) { int err; rpcmouse_dev = input_allocate_device(); if (!rpcmouse_dev) return -ENOMEM; rpcmouse_dev->name = "Acorn RiscPC Mouse"; rpcmouse_dev->phys = "rpcmouse/input0"; rpcmouse_dev->id.bustype = BUS_HOST; rpcmouse_dev->id.vendor = 0x0005; rpcmouse_dev->id.product = 0x0001; rpcmouse_dev->id.version = 0x0100; rpcmouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); rpcmouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); rpcmouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX); rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY); if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, IRQF_SHARED, "rpcmouse", rpcmouse_dev)) { printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n"); err = -EBUSY; goto err_free_dev; } err = input_register_device(rpcmouse_dev); if (err) goto err_free_irq; return 0; err_free_irq: free_irq(IRQ_VSYNCPULSE, rpcmouse_dev); err_free_dev: input_free_device(rpcmouse_dev); return err; } static void __exit rpcmouse_exit(void) { free_irq(IRQ_VSYNCPULSE, rpcmouse_dev); input_unregister_device(rpcmouse_dev); } module_init(rpcmouse_init); module_exit(rpcmouse_exit); |