apc405.c

Uboot源码,非常通用的bootloader.适用于各种平台的Linux系统引导.

/*
 * (C) Copyright 2001-2003
 * Stefan Roese, esd gmbh germany, [e-mail]
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/processor.h>
#include <command.h>
#include <malloc.h>

DECLARE_GLOBAL_DATA_PTR;

#if 0
#define FPGA_DEBUG
#endif

extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
extern void lxt971_no_sleep(void);

/* fpga configuration data - gzip compressed and generated by bin2c */
const unsigned char fpgadata[] =
{
#include "fpgadata.c"
};

/*
 * include common fpga code (for esd boards)
 */
#include "../common/fpga.c"


/* Prototypes */
int gunzip(void *, int, unsigned char *, unsigned long *);


#ifdef CONFIG_LCD_USED
/* logo bitmap data - gzip compressed and generated by bin2c */
unsigned char logo_bmp[] =
{
#include CFG_LCD_LOGO_NAME
};

/*
 * include common lcd code (for esd boards)
 */
#include "../common/lcd.c"

#include CFG_LCD_HEADER_NAME
#endif /* CONFIG_LCD_USED */


int board_revision(void)
{
	unsigned long cntrl0Reg;
	unsigned long value;

	/*
	 * Get version of APC405 board from GPIO's
	 */

	/*
	 * Setup GPIO pins (CS2/GPIO11 and CS3/GPIO12 as GPIO)
	 */
	cntrl0Reg = mfdcr(cntrl0);
	mtdcr(cntrl0, cntrl0Reg | 0x03000000);
	out32(GPIO0_ODR, in32(GPIO0_ODR) & ~0x00180000);
	out32(GPIO0_TCR, in32(GPIO0_TCR) & ~0x00180000);
	udelay(1000);                   /* wait some time before reading input */
	value = in32(GPIO0_IR) & 0x00180000;       /* get config bits */

	/*
	 * Restore GPIO settings
	 */
	mtdcr(cntrl0, cntrl0Reg);

	switch (value) {
	case 0x00180000:
		/* CS2==1 && CS3==1 -> version <= 1.2 */
		return 2;
	case 0x00080000:
		/* CS2==0 && CS3==1 -> version 1.3 */
		return 3;
#if 0 /* not yet manufactured ! */
	case 0x00100000:
		/* CS2==1 && CS3==0 -> version 1.4 */
		return 4;
	case 0x00000000:
		/* CS2==0 && CS3==0 -> version 1.5 */
		return 5;
#endif
	default:
		/* should not be reached! */
		return 0;
	}
}


int board_early_init_f (void)
{
	/*
	 * First pull fpga-prg pin low, to disable fpga logic (on version 2 board)
	 */
	out32(GPIO0_ODR, 0x00000000);        /* no open drain pins      */
	out32(GPIO0_TCR, CFG_FPGA_PRG);      /* setup for output        */
	out32(GPIO0_OR,  CFG_FPGA_PRG);      /* set output pins to high */
	out32(GPIO0_OR, 0);                  /* pull prg low            */

	/*
	 * IRQ 0-15  405GP internally generated; active high; level sensitive
	 * IRQ 16    405GP internally generated; active low; level sensitive
	 * IRQ 17-24 RESERVED
	 * IRQ 25 (EXT IRQ 0) CAN0; active low; level sensitive
	 * IRQ 26 (EXT IRQ 1) SER0 ; active low; level sensitive
	 * IRQ 27 (EXT IRQ 2) SER1; active low; level sensitive
	 * IRQ 28 (EXT IRQ 3) FPGA 0; active low; level sensitive
	 * IRQ 29 (EXT IRQ 4) FPGA 1; active low; level sensitive
	 * IRQ 30 (EXT IRQ 5) PCI INTA; active low; level sensitive
	 * IRQ 31 (EXT IRQ 6) COMPACT FLASH; active high; level sensitive
	 */
	mtdcr(uicsr, 0xFFFFFFFF);       /* clear all ints */
	mtdcr(uicer, 0x00000000);       /* disable all ints */
	mtdcr(uiccr, 0x00000000);       /* set all to be non-critical*/
	mtdcr(uicpr, 0xFFFFFF81);       /* set int polarities */
	mtdcr(uictr, 0x10000000);       /* set int trigger levels */
	mtdcr(uicvcr, 0x00000001);      /* set vect base=0,INT0 highest priority*/
	mtdcr(uicsr, 0xFFFFFFFF);       /* clear all ints */

	/*
	 * EBC Configuration Register: set ready timeout to 512 ebc-clks -> ca. 15 us
	 */
#if 1 /* test-only */
	mtebc (epcr, 0xa8400000); /* ebc always driven */
#else
	mtebc (epcr, 0x28400000); /* ebc in high-z */
#endif

	return 0;
}


/* ------------------------------------------------------------------------- */

int misc_init_f (void)
{
	return 0;  /* dummy implementation */
}


int misc_init_r (void)
{
	volatile unsigned short *fpga_mode =
		(unsigned short *)((ulong)CFG_FPGA_BASE_ADDR + CFG_FPGA_CTRL);
	volatile unsigned short *fpga_ctrl2 =
		(unsigned short *)((ulong)CFG_FPGA_BASE_ADDR + CFG_FPGA_CTRL2);
	volatile unsigned char *duart0_mcr =
		(unsigned char *)((ulong)DUART0_BA + 4);
	volatile unsigned char *duart1_mcr =
		(unsigned char *)((ulong)DUART1_BA + 4);
	volatile unsigned short *fuji_lcdbl_pwm =
		(unsigned short *)((ulong)0xf0100200 + 0xa0);
	unsigned char *dst;
	ulong len = sizeof(fpgadata);
	int status;
	int index;
	int i;
	unsigned long cntrl0Reg;

	/*
	 * Setup GPIO pins (CS6+CS7 as GPIO)
	 */
	cntrl0Reg = mfdcr(cntrl0);
	mtdcr(cntrl0, cntrl0Reg | 0x00300000);

	dst = malloc(CFG_FPGA_MAX_SIZE);
	if (gunzip (dst, CFG_FPGA_MAX_SIZE, (uchar *)fpgadata, &len) != 0) {
		printf ("GUNZIP ERROR - must RESET board to recover\n");
		do_reset (NULL, 0, 0, NULL);
	}

	status = fpga_boot(dst, len);
	if (status != 0) {
		printf("\nFPGA: Booting failed ");
		switch (status) {
		case ERROR_FPGA_PRG_INIT_LOW:
			printf("(Timeout: INIT not low after asserting PROGRAM*)\n ");
			break;
		case ERROR_FPGA_PRG_INIT_HIGH:
			printf("(Timeout: INIT not high after deasserting PROGRAM*)\n ");
			break;
		case ERROR_FPGA_PRG_DONE:
			printf("(Timeout: DONE not high after programming FPGA)\n ");
			break;
		}

		/* display infos on fpgaimage */
		index = 15;
		for (i=0; i<4; i++) {
			len = dst[index];
			printf("FPGA: %s\n", &(dst[index+1]));
			index += len+3;
		}
		putc ('\n');
		/* delayed reboot */
		for (i=20; i>0; i--) {
			printf("Rebooting in %2d seconds \r",i);
			for (index=0;index<1000;index++)
				udelay(1000);
		}
		putc ('\n');
		do_reset(NULL, 0, 0, NULL);
	}

	/* restore gpio/cs settings */
	mtdcr(cntrl0, cntrl0Reg);

	puts("FPGA:  ");

	/* display infos on fpgaimage */
	index = 15;
	for (i=0; i<4; i++) {
		len = dst[index];
		printf("%s ", &(dst[index+1]));
		index += len+3;
	}
	putc ('\n');

	free(dst);

	/*
	 * Reset FPGA via FPGA_DATA pin
	 */
	SET_FPGA(FPGA_PRG | FPGA_CLK);
	udelay(1000); /* wait 1ms */
	SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);
	udelay(1000); /* wait 1ms */

	/*
	 * Write board revision in FPGA
	 */
	*fpga_ctrl2 = (*fpga_ctrl2 & 0xfff0) | (gd->board_type & 0x000f);

	/*
	 * Enable power on PS/2 interface (with reset)
	 */
	*fpga_mode |= CFG_FPGA_CTRL_PS2_RESET;
	for (i=0;i<100;i++)
		udelay(1000);
	udelay(1000);
	*fpga_mode &= ~CFG_FPGA_CTRL_PS2_RESET;

	/*
	 * Enable interrupts in exar duart mcr[3]
	 */
	*duart0_mcr = 0x08;
	*duart1_mcr = 0x08;

	/*
	 * Init lcd interface and display logo
	 */
	lcd_init((uchar *)CFG_LCD_BIG_REG, (uchar *)CFG_LCD_BIG_MEM,
		 regs_13806_640_480_16bpp,
		 sizeof(regs_13806_640_480_16bpp)/sizeof(regs_13806_640_480_16bpp[0]),
		 logo_bmp, sizeof(logo_bmp));

	/*
	 * Reset microcontroller and setup backlight PWM controller
	 */
	*fpga_mode |= 0x0014;
	for (i=0;i<10;i++)
		udelay(1000);
	*fpga_mode |= 0x001c;
	*fuji_lcdbl_pwm = 0x00ff;

	return (0);
}


/*
 * Check Board Identity:
 */

int checkboard (void)
{
	unsigned char str[64];
	int i = getenv_r ("serial#", str, sizeof(str));

	puts ("Board: ");

	if (i == -1) {
		puts ("### No HW ID - assuming APC405");
	} else {
		puts(str);
	}

	gd->board_type = board_revision();
	printf(", Rev 1.%ld\n", gd->board_type);

	/*
	 * Disable sleep mode in LXT971
	 */
	lxt971_no_sleep();

	return 0;
}

/* ------------------------------------------------------------------------- */

long int initdram (int board_type)
{
	unsigned long val;

	mtdcr(memcfga, mem_mb0cf);
	val = mfdcr(memcfgd);

#if 0
	printf("\nmb0cf=%x\n", val); /* test-only */
	printf("strap=%x\n", mfdcr(strap)); /* test-only */
#endif

	return (4*1024*1024 << ((val & 0x000e0000) >> 17));
}

/* ------------------------------------------------------------------------- */

int testdram (void)
{
	/* TODO: XXX XXX XXX */
	printf ("test: 16 MB - ok\n");

	return (0);
}

/* ------------------------------------------------------------------------- */

#ifdef CONFIG_IDE_RESET

void ide_set_reset(int on)
{
	volatile unsigned short *fpga_mode =
		(unsigned short *)((ulong)CFG_FPGA_BASE_ADDR + CFG_FPGA_CTRL);

	/*
	 * Assert or deassert CompactFlash Reset Pin
	 */
	if (on) {		/* assert RESET */
		*fpga_mode &= ~(CFG_FPGA_CTRL_CF_RESET);
	} else {		/* release RESET */
		*fpga_mode |= CFG_FPGA_CTRL_CF_RESET;
	}
}

#endif /* CONFIG_IDE_RESET */

/* ------------------------------------------------------------------------- */