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Diffstat (limited to 'payloads/libpayload/curses/speaker.c')
| -rw-r--r-- | payloads/libpayload/curses/speaker.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/payloads/libpayload/curses/speaker.c b/payloads/libpayload/curses/speaker.c deleted file mode 100644 index 53cfd586d1..0000000000 --- a/payloads/libpayload/curses/speaker.c +++ /dev/null @@ -1,100 +0,0 @@ -/* - * This file is part of the libpayload project. - * - * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Datasheet: - * - Name: 82C54 CHMOS Programmable Interval Timer - * - PDF: http://www.intel.com/design/archives/periphrl/docs/23124406.pdf - * - Order number: 231244-006 - */ - -#include "local.h" - -#define I82C54_CONTROL_WORD_REGISTER 0x43 /* Write-only. */ - -#define I82C54_COUNTER0 0x40 -#define I82C54_COUNTER1 0x41 -#define I82C54_COUNTER2 0x42 - -#define PC_SPEAKER_PORT 0x61 - -/** - * Use the PC speaker to create a tone/sound of the specified frequency. - * - * The Intel 82C54 CHMOS Programmable Interval Timer (PIT) provides a - * superset of the functions of the original Intel 8253/8254 PIT. It has - * three programmable counters/timers (counter 0, 1, and 2). Counter 2 can - * be used to generate tones/sounds of various frequencies and duration. - * - * See also: - * - http://en.wikipedia.org/wiki/Pc_speaker - * - http://en.wikipedia.org/wiki/Intel_8253 - * - * @param freq The frequency of the tone. - */ -void speaker_enable(u16 freq) -{ - /* Select counter 2. Read/write LSB first, then MSB. Use mode 3 - (square wave generator). Use a 16bit binary counter. */ - outb(0xb6, I82C54_CONTROL_WORD_REGISTER); - - /* Set the desired tone frequency. */ - outb((u8)(freq & 0x00ff), I82C54_COUNTER2); /* LSB. */ - outb((u8)(freq >> 8), I82C54_COUNTER2); /* MSB. */ - - /* Enable the PC speaker (set bits 0 and 1). */ - outb(inb(PC_SPEAKER_PORT) | 0x03, PC_SPEAKER_PORT); -} - -/** - * Disable the PC speaker. - */ -void speaker_disable(void) -{ - /* Disable the PC speaker (clear bits 0 and 1). */ - outb(inb(PC_SPEAKER_PORT) & 0xfc, PC_SPEAKER_PORT); -} - -/** - * Use the PC speaker to create a tone/beep of the specified frequency - * and duration. - * - * Wait for a short amount of time after the beep to make it distinguishable - * from the next beep (if any). - * - * @param freq The frequency of the tone/beep. - * @param duration The duration of the tone/beep in milliseconds. - */ -void speaker_tone(u16 freq, unsigned int duration) -{ - speaker_enable(freq); - mdelay(duration); - speaker_disable(); - mdelay(100); -} |