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15#include <linux/init.h>
16#include <linux/input.h>
17#include <linux/io.h>
18#include "pcsp.h"
19#include "pcsp_input.h"
20
21static void pcspkr_do_sound(unsigned int count)
22{
23 unsigned long flags;
24
25 raw_spin_lock_irqsave(&i8253_lock, flags);
26
27 if (count) {
28
29 outb_p(0xB6, 0x43);
30
31 outb_p(count & 0xff, 0x42);
32 outb((count >> 8) & 0xff, 0x42);
33
34 outb_p(inb_p(0x61) | 3, 0x61);
35 } else {
36
37 outb(inb_p(0x61) & 0xFC, 0x61);
38 }
39
40 raw_spin_unlock_irqrestore(&i8253_lock, flags);
41}
42
43void pcspkr_stop_sound(void)
44{
45 pcspkr_do_sound(0);
46}
47
48static int pcspkr_input_event(struct input_dev *dev, unsigned int type,
49 unsigned int code, int value)
50{
51 unsigned int count = 0;
52
53 if (atomic_read(&pcsp_chip.timer_active) || !pcsp_chip.pcspkr)
54 return 0;
55
56 switch (type) {
57 case EV_SND:
58 switch (code) {
59 case SND_BELL:
60 if (value)
61 value = 1000;
62 case SND_TONE:
63 break;
64 default:
65 return -1;
66 }
67 break;
68
69 default:
70 return -1;
71 }
72
73 if (value > 20 && value < 32767)
74 count = PIT_TICK_RATE / value;
75
76 pcspkr_do_sound(count);
77
78 return 0;
79}
80
81int pcspkr_input_init(struct input_dev **rdev, struct device *dev)
82{
83 int err;
84
85 struct input_dev *input_dev = input_allocate_device();
86 if (!input_dev)
87 return -ENOMEM;
88
89 input_dev->name = "PC Speaker";
90 input_dev->phys = "isa0061/input0";
91 input_dev->id.bustype = BUS_ISA;
92 input_dev->id.vendor = 0x001f;
93 input_dev->id.product = 0x0001;
94 input_dev->id.version = 0x0100;
95 input_dev->dev.parent = dev;
96
97 input_dev->evbit[0] = BIT(EV_SND);
98 input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
99 input_dev->event = pcspkr_input_event;
100
101 err = input_register_device(input_dev);
102 if (err) {
103 input_free_device(input_dev);
104 return err;
105 }
106
107 *rdev = input_dev;
108 return 0;
109}
110
111int pcspkr_input_remove(struct input_dev *dev)
112{
113 pcspkr_stop_sound();
114 input_unregister_device(dev);
115
116 return 0;
117}
118