at91cap9dk.c

bootstrap,用于启动9260的。通常是先启动此文件然后启动uboot

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support  -  ROUSSET  -
 * ----------------------------------------------------------------------------
 * Copyright (c) 2006, Atmel Corporation

 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaiimer below.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the disclaimer below in the documentation and/or
 * other materials provided with the distribution.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
 * ----------------------------------------------------------------------------
 * File Name           : at91sam9263ek.c
 * Object              :
 * Creation            : NLe Aug 8th 2006
 *-----------------------------------------------------------------------------
 */
#include "../../include/part.h"
#include "../../include/gpio.h"
#include "../../include/pmc.h"
#include "../../include/debug.h"
#include "../../include/sdramc.h"
#include "../../include/main.h"
#ifdef CFG_NANDFLASH
#include "../../include/nandflash.h"
#endif
#ifdef CFG_DATAFLASH
#include "../../include/dataflash.h"
#endif

static inline unsigned int get_cp15(void)
{
	unsigned int value;
	__asm__("mrc p15, 0, %0, c1, c0, 0" : "=r" (value));
	return value;
}

static inline void set_cp15(unsigned int value)
{
	__asm__("mcr p15, 0, %0, c1, c0, 0" : : "r" (value));
}


#ifdef CFG_HW_INIT
/*---------------------------------------------------------------------------- */
/* \fn    hw_init							       */
/* \brief This function performs very low level HW initialization	       */
/* This function is invoked as soon as possible during the c_startup	       */
/* The bss segment must be initialized					       */
/*---------------------------------------------------------------------------- */
void hw_init(void)
{
	/* Configure PIOs */
	const struct pio_desc hw_pio[] = {
#ifdef CFG_DEBUG
		{"RXD", AT91C_PIN_PC(30), 0, PIO_DEFAULT, PIO_PERIPH_A},
		{"TXD", AT91C_PIN_PC(31), 0, PIO_DEFAULT, PIO_PERIPH_A},
#endif
		{(char *) 0, 0, 0, PIO_DEFAULT, PIO_PERIPH_A},
	};

	/* Disable watchdog */
#warning Check Watchdog interface
	writel(AT91C_WDTC_WDDIS, AT91C_BASE_WDTC + WDTC_WDMR);

	/* At this stage the main oscillator is supposed to be enabled
	 * PCK = MCK = MOSC */

	/* Configure PLLA = MOSC * (PLL_MULA + 1) / PLL_DIVA */
	pmc_cfg_plla(PLLA_SETTINGS, PLL_LOCK_TIMEOUT);

	/* Switch MCK on PLLA output PCK = PLLA = 2 * MCK */
	pmc_cfg_mck(MCKR_SETTINGS, PLL_LOCK_TIMEOUT);

	/* Configure PLLB */
	pmc_cfg_pllb(PLLB_SETTINGS, PLL_LOCK_TIMEOUT);

	/* Configure the PIO controller to output PCK0 */
	pio_setup(hw_pio);

#ifdef CFG_DEBUG
	/* Enable Debug messages on the DBGU */
	dbg_init(BAUDRATE(MASTER_CLOCK, 115200));
	dbg_print("Start AT91Bootstrap...\n\r");
#endif /* CFG_DEBUG */

#ifdef CFG_SDRAM
	/* Initialize the matrix */
#warning Configure EMAC priority
       
	/* VDDIOMSEL = 1 -> Memories are 3.3V powered */
#warning VDDIOMSEL 3.3V check your SDRAM add on board
	writel( readl(AT91C_BASE_CCFG + CCFG_EBICSA) | (1 << 16), AT91C_BASE_CCFG + CCFG_EBICSA);

#warning configure SDRAM timings  
	/* Configure SDRAM Controller */
	sdram_init(	AT91C_SDRAMC_NC_9  |
				AT91C_SDRAMC_NR_13 |
				AT91C_SDRAMC_CAS_2 |
				AT91C_SDRAMC_NB_4_BANKS |
				AT91C_SDRAMC_DBW_32_BITS |
				AT91C_SDRAMC_TWR_2 |
				AT91C_SDRAMC_TRC_7 |
				AT91C_SDRAMC_TRP_2 |
				AT91C_SDRAMC_TRCD_2 |
				AT91C_SDRAMC_TRAS_5 |
				AT91C_SDRAMC_TXSR_8,			/* Control Register */
				(MASTER_CLOCK * 7)/1000000);	/* Refresh Timer Register */
#endif	/* CFG_SDRAM */
}
#endif /* CFG_HW_INIT */


#ifdef CFG_SDRAM
//*----------------------------------------------------------------------------
//* \fn    sdramc_hw_init
//* \brief This function performs SDRAMC HW initialization
//*----------------------------------------------------------------------------*/
void sdramc_hw_init(void)
{
#warning sdramc_hw_init
	/* Configure PIOs */
	const struct pio_desc sdramc_pio[] = {
		{(char *) 0, 0, 0, PIO_DEFAULT, PIO_PERIPH_A},
	};

	/* Configure the SDRAMC PIO controller */
	pio_setup(sdramc_pio);
}
#endif

#ifdef CFG_DATAFLASH
/*------------------------------------------------------------------------------*/
/* \fn    df_hw_init								*/
/* \brief This function performs DataFlash HW initialization			*/
/*------------------------------------------------------------------------------*/
void df_hw_init(void)
{
#warning dataflash hw_init
	/* Configure PIOs */
	const struct pio_desc df_pio[] = {
		{"MISO",  AT91C_PIN_PA(0), 0, PIO_DEFAULT, PIO_PERIPH_B},
		{"MOSI",  AT91C_PIN_PA(1), 0, PIO_DEFAULT, PIO_PERIPH_B},
		{"SPCK",  AT91C_PIN_PA(2), 0, PIO_DEFAULT, PIO_PERIPH_B},
		{"NPCS0", AT91C_PIN_PA(5), 0, PIO_DEFAULT, PIO_PERIPH_B},
		{(char *) 0, 0, 0, PIO_DEFAULT, PIO_PERIPH_A},
	};

	/* Configure the PIO controller */
	pio_setup(df_pio);
}
#endif /* CFG_DATAFLASH */