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/* bspstart.c for bf537Stamp
*
* This routine starts the application. It includes application,
* board, and monitor specific initialization and configuration.
* The generic CPU dependent initialization has been performed
* before this routine is invoked.
*
* Copyright (c) 2006 by Atos Automacao Industrial Ltda.
* written by Alain Schaefer <alain.schaefer@easc.ch>
* and Antonio Giovanini <antonio@atos.com.br>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp.h>
#include <libcpu/bf537.h>
#include <libcpu/gpioRegs.h>
#include <libcpu/mmu.h>
#include <libcpu/interrupt.h>
#if 0
static bfin_mmu_region_t mmuRegions[] = {
};
#endif
void Init_RTC(void);
static void initPLL(void);
static void initEBIU(void);
static void initGPIO(void);
/*
* BSP pretasking hook.
*/
void bsp_pretasking_hook(void)
{
bfin_interrupt_init();
}
/*
* bsp_start
*
* This routine does the bulk of the BSP initialization.
*/
void bsp_start(void)
{
/* BSP Hardware Initialization*/
/*bfin_mmu_init(sizeof(mmuRegions) / sizeof(mmuRegions[0]), mmuRegions);*/
Init_RTC(); /* Blackfin Real Time Clock initialization */
initPLL(); /* PLL initialization */
initEBIU(); /* EBIU initialization */
initGPIO(); /* GPIO initialization */
}
/*
* initPLL
*
* Routine to initialize the PLL. The BF537 Stamp uses a 27 Mhz XTAL. BISON
* See "../bf537Stamp/include/bsp.h" for more information.
*/
static void initPLL(void) {
#ifdef BISON
unsigned int n;
/* Configure PLL registers */
*((uint16_t*)PLL_LOCKCNT) = 0x1000;
*((uint16_t*)PLL_DIV) = PLL_CSEL|PLL_SSEL;
*((uint16_t*)PLL_CTL) = PLL_MSEL|PLL_DF;
/* Commands to set PLL values */
asm("cli r0;");
asm("idle;");
asm("sti r0;");
/* Delay for PLL stabilization */
for (n=0; n<200; n++) {}
#endif
}
/*
* initEBIU
*
* Configure extern memory
*/
static void initEBIU(void) {
#ifdef BISON
/* Configure FLASH */
*((uint32_t*)EBIU_AMBCTL0) = 0x7bb07bb0L;
*((uint32_t*)EBIU_AMBCTL1) = 0x7bb07bb0L;
*((uint16_t*)EBIU_AMGCTL) = 0x000f;
/* Configure SDRAM
*((uint32_t*)EBIU_SDGCTL) = 0x0091998d;
*((uint16_t*)EBIU_SDBCTL) = 0x0013;
*((uint16_t*)EBIU_SDRRC) = 0x0817;
*/
#endif
}
/*
* initGPIO
*
* Enable LEDs port
*/
static void initGPIO(void) {
#if (!BFIN_ON_SKYEYE)
*(uint16_t volatile *) PORT_MUX = 0;
/* port f bits 0, 1: uart0 tx, rx */
/* bits 2 - 5: buttons */
/* bits 6 - 11: leds */
*(uint16_t volatile *) PORTF_FER = 0x0003;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_INEN_OFFSET) = 0x003c;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_POLAR_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_EDGE_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_BOTH_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_MASKA_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_MASKB_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_DIR_OFFSET) = 0x0fc0;
*(uint16_t volatile *) PORTG_FER = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_INEN_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_POLAR_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_EDGE_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_BOTH_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_MASKA_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_MASKB_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTGIO_BASE_ADDRESS + PORTIO_DIR_OFFSET) = 0x0000;
/* port h bits 0 - 15: ethernet */
*(uint16_t volatile *) PORTH_FER = 0xffff;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_INEN_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_POLAR_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_EDGE_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_BOTH_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_MASKA_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_MASKB_OFFSET) = 0x0000;
*(uint16_t volatile *) (PORTHIO_BASE_ADDRESS + PORTIO_DIR_OFFSET) = 0x0000;
#endif
}
/*
* Helper Function to use the EzKits LEDS.
* Can be used by the Application.
*/
void setLEDs(uint8_t value) {
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_CLEAR_OFFSET) =
(uint16_t) (~value & 0x3f) << 6;
*(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_SET_OFFSET) =
(uint16_t) (value & 0x3f) << 6;
}
/*
* Helper Function to use the EzKits LEDS
*/
uint8_t getLEDs(void) {
uint16_t r;
r = *(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_OFFSET);
return (uint8_t) ((r >> 6) & 0x3f);
}
uint8_t getButtons(void) {
uint16_t r;
r = *(uint16_t volatile *) (PORTFIO_BASE_ADDRESS + PORTIO_OFFSET);
return (uint8_t) ((r >> 2) & 0x0f);
}
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