pci405.c

ppcboot2.0 华恒光盘里带的BOOTLOADER

/*
 * (C) Copyright 2001
 * 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 <cmd_boot.h>
#include <malloc.h>
#include <pci.h>
#include <405gp_pci.h>

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

#if 0
#define FPGA_DEBUG
#endif

#define PCI_RECONFIG_MAGIC       0x07081967


struct pci_config_regs {
	unsigned short  command;
	unsigned char   latency_timer;
	unsigned char   int_line;
	unsigned long   bar1;
	unsigned long   bar2;
	unsigned long   magic;
};


/* fpga configuration data - generated by bin2cc */
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 *, int *);


int board_pre_init (void)
{
	unsigned long cntrl0Reg;

	/*
	 * 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) CAN1; active low; level sensitive
	 * IRQ 27 (EXT IRQ 2) CAN2; active low; level sensitive
	 * IRQ 28 (EXT IRQ 3) CAN3; active low; level sensitive
	 * IRQ 29 (EXT IRQ 4) unused; active low; level sensitive
	 * IRQ 30 (EXT IRQ 5) FPGA Timestamp; active low; level sensitive
	 * IRQ 31 (EXT IRQ 6) PCI Reset; active low; 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, 0xFFFFFF80);        /* 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 */

	/*
	 * Setup GPIO pins (IRQ4/GPIO21 as GPIO)
	 */
	cntrl0Reg = mfdcr(cntrl0);
	mtdcr(cntrl0, cntrl0Reg | 0x00008000);

	return 0;
}


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

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


int misc_init_r (void)
{
	unsigned char *dst;
	ulong len = sizeof(fpgadata);
	int status;
	int index;
	int i;
	struct pci_config_regs *pci_regs;

	/*
	 * On PCI-405 the environment is saved in eeprom!
	 * FPGA can be gzip compressed (malloc) and booted this late.
	 */

	dst = malloc(CFG_FPGA_MAX_SIZE);
	if (gunzip (dst, CFG_FPGA_MAX_SIZE, (uchar *)fpgadata, (int *)&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);
	}

	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');

	/*
	 * Rewrite pci config regs (only after soft-reset with magic set)
	 */
	pci_regs = (struct pci_config_regs *)0x10;
	if (pci_regs->magic == PCI_RECONFIG_MAGIC) {
		puts("PCI:   Found magic, rewriting config regs...\n");
		pci_write_config_word(PCIDEVID_405GP, PCI_COMMAND,
				      pci_regs->command);
		pci_write_config_byte(PCIDEVID_405GP, PCI_LATENCY_TIMER,
				      pci_regs->latency_timer);
		pci_write_config_byte(PCIDEVID_405GP, PCI_INTERRUPT_LINE,
				      pci_regs->int_line);
		pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_1,
				       pci_regs->bar1);
		pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_2,
				       pci_regs->bar2);
	}
	pci_regs->magic = 0; /* clear magic again */

#if 0 /* test-only */
	pci_read_config_word(PCIDEVID_405GP, PCI_COMMAND, &(pci_regs->command));
	pci_read_config_byte(PCIDEVID_405GP, PCI_LATENCY_TIMER, &(pci_regs->latency_timer));
	pci_read_config_byte(PCIDEVID_405GP, PCI_INTERRUPT_LINE, &(pci_regs->int_line));
	pci_read_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_1, &(pci_regs->bar1));
	pci_read_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_2, &(pci_regs->bar2));
	pci_regs->magic = PCI_RECONFIG_MAGIC; /* set magic */
#endif

	free(dst);
	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 CPCI405");
	} else {
		puts (str);
	}
	putc ('\n');

	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);
}

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