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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - sound/drivers/pcsp/pcsp_input.c
2 * PC Speaker beeper driver for Linux
4 * Copyright (c) 2002 Vojtech Pavlik
5 * Copyright (c) 1992 Orest Zborowski
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
15 #include <linux/init.h>
16 #include <linux/input.h>
19 #include "pcsp_input.h"
21 static void pcspkr_do_sound(unsigned int count
)
25 raw_spin_lock_irqsave(&i8253_lock
, flags
);
28 /* set command for counter 2, 2 byte write */
30 /* select desired HZ */
31 outb_p(count
& 0xff, 0x42);
32 outb((count
>> 8) & 0xff, 0x42);
33 /* enable counter 2 */
34 outb_p(inb_p(0x61) | 3, 0x61);
36 /* disable counter 2 */
37 outb(inb_p(0x61) & 0xFC, 0x61);
40 raw_spin_unlock_irqrestore(&i8253_lock
, flags
);
43 void pcspkr_stop_sound(void)
48 static int pcspkr_input_event(struct input_dev
*dev
, unsigned int type
,
49 unsigned int code
, int value
)
51 unsigned int count
= 0;
53 if (atomic_read(&pcsp_chip
.timer_active
) || !pcsp_chip
.pcspkr
)
73 if (value
> 20 && value
< 32767)
74 count
= PIT_TICK_RATE
/ value
;
76 pcspkr_do_sound(count
);
81 int pcspkr_input_init(struct input_dev
**rdev
, struct device
*dev
)
85 struct input_dev
*input_dev
= input_allocate_device();
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
;
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
;
101 err
= input_register_device(input_dev
);
103 input_free_device(input_dev
);
111 int pcspkr_input_remove(struct input_dev
*dev
)
114 input_unregister_device(dev
); /* this also does kfree() */