aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input/mouse/rpcmouse.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/input/mouse/rpcmouse.c')
-rw-r--r--drivers/input/mouse/rpcmouse.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/drivers/input/mouse/rpcmouse.c b/drivers/input/mouse/rpcmouse.c
new file mode 100644
index 000000000000..7280f68afcee
--- /dev/null
+++ b/drivers/input/mouse/rpcmouse.c
@@ -0,0 +1,107 @@
1/*
2 * Acorn RiscPC mouse driver for Linux/ARM
3 *
4 * Copyright (c) 2000-2002 Vojtech Pavlik
5 * Copyright (C) 1996-2002 Russell King
6 *
7 */
8
9/*
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 *
14 * This handles the Acorn RiscPCs mouse. We basically have a couple of
15 * hardware registers that track the sensor count for the X-Y movement and
16 * another register holding the button state. On every VSYNC interrupt we read
17 * the complete state and then work out if something has changed.
18 */
19
20#include <linux/module.h>
21#include <linux/sched.h>
22#include <linux/ptrace.h>
23#include <linux/interrupt.h>
24#include <linux/init.h>
25#include <linux/input.h>
26
27#include <asm/hardware.h>
28#include <asm/irq.h>
29#include <asm/io.h>
30#include <asm/hardware/iomd.h>
31
32MODULE_AUTHOR("Vojtech Pavlik, Russell King");
33MODULE_DESCRIPTION("Acorn RiscPC mouse driver");
34MODULE_LICENSE("GPL");
35
36static short rpcmouse_lastx, rpcmouse_lasty;
37
38static struct input_dev rpcmouse_dev = {
39 .evbit = { BIT(EV_KEY) | BIT(EV_REL) },
40 .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT) },
41 .relbit = { BIT(REL_X) | BIT(REL_Y) },
42 .name = "Acorn RiscPC Mouse",
43 .phys = "rpcmouse/input0",
44 .id = {
45 .bustype = BUS_HOST,
46 .vendor = 0x0005,
47 .product = 0x0001,
48 .version = 0x0100,
49 },
50};
51
52static irqreturn_t rpcmouse_irq(int irq, void *dev_id, struct pt_regs *regs)
53{
54 struct input_dev *dev = dev_id;
55 short x, y, dx, dy, b;
56
57 x = (short) iomd_readl(IOMD_MOUSEX);
58 y = (short) iomd_readl(IOMD_MOUSEY);
59 b = (short) (__raw_readl(0xe0310000) ^ 0x70);
60
61 dx = x - rpcmouse_lastx;
62 dy = y - rpcmouse_lasty;
63
64 rpcmouse_lastx = x;
65 rpcmouse_lasty = y;
66
67 input_regs(dev, regs);
68
69 input_report_rel(dev, REL_X, dx);
70 input_report_rel(dev, REL_Y, -dy);
71
72 input_report_key(dev, BTN_LEFT, b & 0x40);
73 input_report_key(dev, BTN_MIDDLE, b & 0x20);
74 input_report_key(dev, BTN_RIGHT, b & 0x10);
75
76 input_sync(dev);
77
78 return IRQ_HANDLED;
79}
80
81static int __init rpcmouse_init(void)
82{
83 init_input_dev(&rpcmouse_dev);
84
85 rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX);
86 rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY);
87
88 if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, SA_SHIRQ, "rpcmouse", &rpcmouse_dev)) {
89 printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n");
90 return -1;
91 }
92
93 input_register_device(&rpcmouse_dev);
94
95 printk(KERN_INFO "input: Acorn RiscPC mouse\n");
96
97 return 0;
98}
99
100static void __exit rpcmouse_exit(void)
101{
102 input_unregister_device(&rpcmouse_dev);
103 free_irq(IRQ_VSYNCPULSE, &rpcmouse_dev);
104}
105
106module_init(rpcmouse_init);
107module_exit(rpcmouse_exit);