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/************************************************************************************
* configs/mx1ads/src/up_boot.c
* arch/arm/src/board/up_boot.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "imx_gpio.h"
/************************************************************************************
* Definitions
************************************************************************************/
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: imx_boardinitialize
*
* Description:
* All i.MX architectures must provide the following entry point. This entry point
* is called early in the intitialization -- after all memory has been configured
* and mapped but before any devices have been initialized.
************************************************************************************/
void imx_boardinitialize(void)
{
uint32_t regval;
putreg32(0x000003ab, IMX_SC_GPCR); /* I/O pad driving strength */
putreg32(IMX_MPCTL0_VALUE, IMX_PLL_MPCTL0);
putreg32(IMX_SPCTL0_VALUE, IMX_PLL_SPCTL0);
regval = (CSCR_CLKOSEL_FCLK | /* Output FCLK on CLK0 */
(IMX_CSCR_USBDIV << PLL_CSCR_USBDIV_SHIFT) | /* USB divider */
CSCR_SDCNT_4thEDGE | /* Shutdown on 4th edge */
(IMX_CSCR_BCLKDIV << PLL_CSCR_BCLKDIV_SHIFT) | /* Bclock divider */
PLL_CSCR_SPEN | PLL_CSCR_MPEN); /* Enable MUC and System PLL */
putreg32(regval, IMX_PLL_CSCR);
/* Use these new frequencies now */
putreg32(IMX_PLL_CSCR, regval | (PLL_CSCR_MPLLRESTART|PLL_CSCR_SPLLRESTART));
/* Setup peripheral clocking */
putreg32(IMX_PCDR_VALUE, IMX_PLL_PCDR);
/* Configure CS4 for cs8900 Ethernet */
#ifdef CONFIG_NET
putreg32(0x00000f00, IMX_EIM_CS4H);
putreg32(0x00001501, IMX_EIM_CS4L);
imxgpio_configprimary(GPIOA, 21);
imxgpio_configprimary(GPIOA, 22);
(void)getreg32(IMX_CS4_VSECTION + 0x0c);
(void)getreg32(IMX_CS4_VSECTION + 0x0c);
#endif
}
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