/*
 *  vendors/Motorola/M5235EVB/board.c
 *  CoLiLo MCF5235EVB Development board port
 *
 *  (C) Copyright April 2003, Jeremy Andrus <jeremy@jeremya.com>
 *
 */
#include "arch.h"
#include "mcfuart.h"
#include "ledstate.h"

char	ident[] = " Motorola MCF523x EVB";
char	copyright[] = " (C) 2004, Jate Sujjavanich";

extern unsigned int downloadPort;
extern unsigned int image_size;
extern unsigned char *xfer_addr;
extern unsigned char *down_addr;
extern unsigned char *dest_addr;
extern unsigned char *source_addr;

extern unsigned long consoleBase;

void configureConsole();
void configureAuxSerial();
void setLED(int state);
void setImageParams();
void setupBoard();
static int delay(int size);
void setupDRAM();

#define	IMAGE_ADDR 0xfff08000  /* colilo shouldn't be more than 32k */
#define IMAGE_SIZE 0x00100000   /* You really can't get any bigger than 2MB - 32 k :-) */
#define XFER_ADDR 0x20000
#define DEFAULT_PORT 1

void configureConsole()
{
	/** Note: The UART timer in the 5235 uses the bus clock (PSTCLK / 2) to generate the baud ***/
	consoleBase = MCFUART_BASE1;
	configureSerial(MCFUART_BASE1, 19200, MCF_BUSCLK); /* dBUG compliance: 19200 it is. */
}

void configureAuxSerial()
{
	configureSerial(MCFUART_BASE2, 115200, MCF_BUSCLK); /* This can be used for image transfers */
}

/*
 *  State to LED mapping:
 *  The gpio pins 53,52,51,34,19,18,12,11,9 will serve as a nice boot-up state indicator
 *
 */
void setLED(int state)
{
}

void setImageParams()
{
	downloadPort = DEFAULT_PORT;
	image_size  = IMAGE_SIZE;
	source_addr = (unsigned char *)IMAGE_ADDR;
	down_addr   = (unsigned char *)IMAGE_ADDR;
	xfer_addr   = (unsigned char *)XFER_ADDR;
	dest_addr   = (unsigned char *)XFER_ADDR;
}

void setup_GPIO()
{
	// set D[15:0] to be data
	MCF5235_PAR_AD |= PAR_DATAL;
	MCF5235_PAR_UART |= PAR_ENABLE_U1U2_TXRX;
}

void setupBoard()
{
	// disable watchdog timer
	mbar_writeShort(MCF5235_WCR, 0);

	// set up PLL for 150 MHz
	mbar_writeLong(MCF_SYNCR, 0x01000000);

	// set up CS0
	mbar_writeShort(MCF_CSAR0, 0xFFE0);
	mbar_writeShort(MCF_CSCR0, 0x1980);
	mbar_writeLong(MCF_CSMR0, 0x001F0001);

	// setup GPIO for DRAM
	setup_GPIO();
}

static int delay(int size)
{
	int i;

	for (i = 0; (i < size); i++)
	  nop();
}

/*
 *  SDRAM is pretty confusing.
 *  Please read _all_ the docs before meddling with this code :-)
 *	~Jeremy
 */
void setupDRAM()
{
	int temp;

	// delay for 100us
	delay(10000);
	// initialize registers
	mbar_writeShort(MCF_DCR, 0x0446);
	mbar_writeLong(MCF_DACR0, 0x00001300);
	mbar_writeLong(MCF_DMR0, 0x00FC0001);

	// Initiate PALL command (set IP)
	mbar_writeLong(MCF_DACR0, 0x00001308);
	*((volatile unsigned long *)0x0) = 0xA5A59696;

	// Enable refresh (set RE)
	mbar_writeLong(MCF_DACR0, 0x00009300);

	// wait for 8 refresh cycles
	delay(10000);

	// Issue the MRS command (set IMRS)
	mbar_writeLong(MCF_DACR0, 0x00009340);
	*((volatile unsigned long *)0x00000000) = 0xA5A59696; // send command reg
}