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S5L8700: implement kernel timer

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21672 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken 2009-07-05 19:09:14 +00:00
parent e63904c7e9
commit 9926c933c7
3 changed files with 64 additions and 0 deletions
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3
firmware/SOURCES
View file

@ -1258,10 +1258,13 @@ target/arm/s5l8700/meizu-m6sp/lcd-m6sp.c
#ifdef MEIZU_M3 #ifdef MEIZU_M3
target/arm/s5l8700/backlight-meizu.c target/arm/s5l8700/backlight-meizu.c
target/arm/s5l8700/kernel-s5l8700.c
target/arm/s5l8700/meizu-m3/lcd-m3.c target/arm/s5l8700/meizu-m3/lcd-m3.c
drivers/qt1106.c drivers/qt1106.c
#ifndef SIMULATOR #ifndef SIMULATOR
#ifndef BOOTLOADER #ifndef BOOTLOADER
target/arm/s5l8700/dma-s5l8700.c
target/arm/s5l8700/pcm-s5l8700.c
target/arm/s5l8700/udacodec-meizu.c target/arm/s5l8700/udacodec-meizu.c
#endif /* BOOTLOADER */ #endif /* BOOTLOADER */
#endif /* SIMULATOR */ #endif /* SIMULATOR */

2
firmware/target/arm/s5l8700/boot.lds
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@ -66,8 +66,10 @@ SECTIONS
{ {
*(.stack) *(.stack)
_stackbegin = .; _stackbegin = .;
stackbegin = .;
. += 0x2000; . += 0x2000;
_stackend = .; _stackend = .;
stackend = .;
_irqstackbegin = .; _irqstackbegin = .;
. += 0x400; . += 0x400;
_irqstackend = .; _irqstackend = .;

59
firmware/target/arm/s5l8700/kernel-s5l8700.c Normal file
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@ -0,0 +1,59 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright © 2009 Bertrik Sikken
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "system.h"
#include "kernel.h"
/* S5L8700 driver for the kernel timer
Timer B is configured as a 10 kHz timer (assuming PCLK = 100 MHz)
*/
void INT_TIMERB(void)
{
/* clear interrupt */
TBCON = TBCON;
call_tick_tasks(); /* Run through the list of tick tasks */
}
void tick_start(unsigned int interval_in_ms)
{
int cycles = 10 * interval_in_ms;
/* enable timer clock */
PWRCON &= ~(1 << 4);
/* configure timer for 10 kHz */
TBCMD = (1 << 1); /* TB_CLR */
TBPRE = 625; /* prescaler */
TBCON = (0 << 13) | /* TB_INT1_EN */
(1 << 12) | /* TB_INT0_EN */
(0 << 11) | /* TB_START */
(2 << 8) | /* TB_CS = PCLK / 16 */
(0 << 4); /* TB_MODE_SEL = interval mode */
TBDATA0 = cycles-1; /* set interval period */
TBCMD = (1 << 0); /* TB_EN */
/* enable timer interrupt */
INTMSK |= (1 << 7);
}