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/*
* File : board.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2009 RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2006-03-24 Bernard first implementation
* 2006-05-05 Bernard add DATA_COUNT definition
* 2006-10-05 Alsor.Z for s3c2410x porting
* 2007-11-20 Yi.Qiu add lcd,touch,console
*/
#include <rtthread.h>
#include <rthw.h>
#include "board.h"
#include "led.h"
/**
* @addtogroup mini2440
*/
/*@{*/
extern rt_uint32_t PCLK, FCLK, HCLK, UCLK;
extern void rt_hw_clock_init(void);
extern void rt_hw_mmu_init(void);
extern void rt_hw_get_clock(void);
extern void rt_hw_set_dividor(rt_uint8_t hdivn, rt_uint8_t pdivn);
extern void rt_hw_set_clock(rt_uint8_t sdiv, rt_uint8_t pdiv, rt_uint8_t mdiv);
#define UART0 ((struct uartport *)&U0BASE)
struct serial_int_rx uart0_int_rx;
struct serial_device uart0 =
{
UART0,
&uart0_int_rx,
RT_NULL
};
struct rt_device uart0_device;
#define UART2 ((struct uartport *)&U2BASE)
struct serial_int_rx uart2_int_rx;
struct serial_device uart2 =
{
UART2,
&uart2_int_rx,
RT_NULL
};
struct rt_device uart2_device;
/**
* This function will handle rtos timer
*/
static void rt_timer_handler(int vector, void *param)
{
rt_tick_increase();
}
/**
* This function will handle serial
*/
static void rt_serial0_handler(int vector, void *param)
{
INTSUBMSK |= (BIT_SUB_RXD0);
rt_hw_serial_isr(&uart0_device);
SUBSRCPND |= BIT_SUB_RXD0;
/* Unmask sub interrupt (RXD0) */
INTSUBMSK &=~(BIT_SUB_RXD0);
}
/**
* This function will handle serial
*/
static void rt_serial2_handler(int vector, void *param)
{
INTSUBMSK |= (BIT_SUB_RXD2);
rt_hw_serial_isr(&uart2_device);
SUBSRCPND |= BIT_SUB_RXD2;
/* Unmask sub interrupt (RXD0) */
INTSUBMSK &=~(BIT_SUB_RXD2);
}
/**
* This function will handle init uart
*/
static void rt_hw_uart_init(void)
{
int i;
/* UART0 port configure */
GPHCON |= 0xAA;
/* PULLUP is disable */
GPHUP |= 0xF;
/* FIFO enable, Tx/Rx FIFO clear */
uart0.uart_device->ufcon = 0x0;
/* disable the flow control */
uart0.uart_device->umcon = 0x0;
/* Normal,No parity,1 stop,8 bit */
uart0.uart_device->ulcon = 0x3;
/*
* tx=level,rx=edge,disable timeout int.,enable rx error int.,
* normal,interrupt or polling
*/
uart0.uart_device->ucon = 0x245;
/* Set uart0 bps */
uart0.uart_device->ubrd = (rt_int32_t)(PCLK / (BPS * 16)) - 1;
/* output PCLK to UART0/1, PWMTIMER */
CLKCON |= 0x0D00;
/* FIFO enable, Tx/Rx FIFO clear */
uart2.uart_device->ufcon = 0x0;
/* disable the flow control */
uart2.uart_device->umcon = 0x0;
/* Normal,No parity,1 stop,8 bit */
uart2.uart_device->ulcon = 0x3;
/*
* tx=level,rx=edge,disable timeout int.,enable rx error int.,
* normal,interrupt or polling
*/
uart2.uart_device->ucon = 0x245;
/* Set uart0 bps */
uart2.uart_device->ubrd = (rt_int32_t)(PCLK / (BPS * 16)) - 1;
for (i = 0; i < 100; i++);
/* install uart0 isr */
INTSUBMSK &= ~(BIT_SUB_RXD0);
/* install uart2 isr */
INTSUBMSK &= ~(BIT_SUB_RXD2);
rt_hw_interrupt_install(INTUART0, rt_serial0_handler, RT_NULL, "UART0");
rt_hw_interrupt_umask(INTUART0);
rt_hw_interrupt_install(INTUART2, rt_serial2_handler, RT_NULL, "UART2");
rt_hw_interrupt_umask(INTUART2);
}
/**
* This function will init timer4 for system ticks
*/
static void rt_hw_timer_init(void)
{
/* timer4, pre = 15+1 */
TCFG0 &= 0xffff00ff;
TCFG0 |= 15 << 8;
/* all are interrupt mode,set Timer 4 MUX 1/4 */
TCFG1 &= 0xfff0ffff;
TCFG1 |= 0x00010000;
TCNTB4 = (rt_int32_t)(PCLK / (4 *16* RT_TICK_PER_SECOND)) - 1;
/* manual update */
TCON = TCON & (~(0x0f<<20)) | (0x02<<20);
/* install interrupt handler */
rt_hw_interrupt_install(INTTIMER4, rt_timer_handler, RT_NULL, "tick");
rt_hw_interrupt_umask(INTTIMER4);
/* start timer4, reload */
TCON = TCON & (~(0x0f<<20)) | (0x05<<20);
}
/**
* This function will init s3ceb2410 board
*/
void rt_hw_board_init(void)
{
/* initialize the system clock */
rt_hw_clock_init();
/* Get the clock */
rt_hw_get_clock();
/* initialize led port */
rt_hw_led_init();
/* initialize uart */
rt_hw_uart_init();
/* initialize mmu */
rt_hw_mmu_init();
/* initialize timer4 */
rt_hw_timer_init();
}
/*@}*/
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