oxc.c

U BOOT源码

/*
 * (C) Copyright 2000
 * Rob Taylor, Flying Pig Systems. [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 <mpc824x.h>
#include <pci.h>
#include <i2c.h>

int checkboard (void)
{
	puts (	"Board: OXC8240\n" );
	return 0;
}

long int initdram (int board_type)
{
#ifndef CFG_RAMBOOT
	int		 i, cnt;
	volatile uchar * base= CFG_SDRAM_BASE;
	volatile ulong * addr;
	ulong		 save[32];
	ulong		 val, ret  = 0;

	for (i=0, cnt=(CFG_MAX_RAM_SIZE / sizeof(long)) >> 1; cnt > 0; cnt >>= 1) {
		addr = (volatile ulong *)base + cnt;
		save[i++] = *addr;
		*addr = ~cnt;
	}

	addr = (volatile ulong *)base;
	save[i] = *addr;
	*addr = 0;

	if (*addr != 0) {
		*addr = save[i];
		goto Done;
	}

	for (cnt = 1; cnt <= CFG_MAX_RAM_SIZE / sizeof(long); cnt <<= 1) {
		addr = (volatile ulong *)base + cnt;
		val = *addr;
		*addr = save[--i];
		if (val != ~cnt) {
			ulong new_bank0_end = cnt * sizeof(long) - 1;
			ulong mear1  = mpc824x_mpc107_getreg(MEAR1);
			ulong emear1 = mpc824x_mpc107_getreg(EMEAR1);
			mear1 =  (mear1  & 0xFFFFFF00) |
			((new_bank0_end & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT);
			emear1 = (emear1 & 0xFFFFFF00) |
			((new_bank0_end & MICR_ADDR_MASK) >> MICR_EADDR_SHIFT);
			mpc824x_mpc107_setreg(MEAR1,  mear1);
			mpc824x_mpc107_setreg(EMEAR1, emear1);

			ret = cnt * sizeof(long);
			goto Done;
		}
	}

	ret = CFG_MAX_RAM_SIZE;
Done:
	return ret;
#else
	/* if U-Boot starts from RAM, then suppose we have 16Mb of RAM */
	return (16 << 20);
#endif
}

/*
 * Initialize PCI Devices, report devices found.
 */
#ifndef CONFIG_PCI_PNP
static struct pci_config_table pci_oxc_config_table[] = {
	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0x14, PCI_ANY_ID,
	  pci_cfgfunc_config_device, { PCI_ENET0_IOADDR,
				       PCI_ENET0_MEMADDR,
				       PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0x15, PCI_ANY_ID,
	  pci_cfgfunc_config_device, { PCI_ENET1_IOADDR,
				       PCI_ENET1_MEMADDR,
				       PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER }},
	{ }
};
#endif

static struct pci_controller hose = {
#ifndef CONFIG_PCI_PNP
	config_table: pci_oxc_config_table,
#endif
};

void pci_init_board (void)
{
	pci_mpc824x_init(&hose);
}

int board_pre_init (void)
{
	*(volatile unsigned char *)(CFG_CPLD_RESET) = 0x89;
	return 0;
}

#ifdef CONFIG_WATCHDOG
void oxc_wdt_reset(void)
{
	*(volatile unsigned char *)(CFG_CPLD_WATCHDOG) = 0xff;
}

void watchdog_reset(void)
{
	int re_enable = disable_interrupts();

	oxc_wdt_reset();
	if (re_enable)
		enable_interrupts();
}
#endif

static int oxc_get_expander(unsigned char addr, unsigned char * val)
{
	return i2c_read(addr, 0, 0, val, 1);
}

static int oxc_set_expander(unsigned char addr, unsigned char val)
{
	return i2c_write(addr, 0, 0, &val, 1);
}

static int expander0alive = 0;

#ifdef CONFIG_SHOW_ACTIVITY
static int ledtoggle = 0;
static int ledstatus = 1;

void oxc_toggle_activeled(void)
{
	ledtoggle++;
}

void show_activity(int arg)
{
	static unsigned char led = 0;
	unsigned char val;

	if (!expander0alive) return;

	if ((ledtoggle > (2 * arg)) && ledstatus) {
		led ^= 0x80;
		oxc_get_expander(CFG_I2C_EXPANDER0_ADDR, &val);
		udelay(200);
		oxc_set_expander(CFG_I2C_EXPANDER0_ADDR, (val & 0x7F) | led);
		ledtoggle = 0;
	}
}
#endif

#ifdef CONFIG_SHOW_BOOT_PROGRESS
void show_boot_progress(int arg)
{
	unsigned char val;

	if (!expander0alive) return;

	if (arg > 0 && ledstatus) {
		ledstatus = 0;
		oxc_get_expander(CFG_I2C_EXPANDER0_ADDR, &val);
		udelay(200);
		oxc_set_expander(CFG_I2C_EXPANDER0_ADDR, val | 0x80);
	} else if (arg < 0) {
		oxc_get_expander(CFG_I2C_EXPANDER0_ADDR, &val);
		udelay(200);
		oxc_set_expander(CFG_I2C_EXPANDER0_ADDR, val & 0x7F);
		ledstatus = 1;
	}
}
#endif

int misc_init_r (void)
{
	/* check whether the i2c expander #0 is accessible */
	if (!oxc_set_expander(CFG_I2C_EXPANDER0_ADDR, 0x7F)) {
		udelay(200);
		expander0alive = 1;
	}

#ifdef CFG_OXC_GENERATE_IP
	{
		DECLARE_GLOBAL_DATA_PTR;

		char str[32];
		unsigned long ip = CFG_OXC_IPMASK;
		bd_t *bd = gd->bd;

		if (expander0alive) {
			unsigned char val;

			if (!oxc_get_expander(CFG_I2C_EXPANDER0_ADDR, &val)) {
				ip = (ip & 0xffffff00) | ((val & 0x7c) >> 2);
			}
		}

		if ((ip & 0xff) < 3) {
			/* if fail, set x.x.x.254 */
			ip = (ip & 0xffffff00) | 0xfe;
		}

		bd->bi_ip_addr = ip;
		sprintf(str, "%ld.%ld.%ld.%ld",
			(bd->bi_ip_addr & 0xff000000) >> 24,
			(bd->bi_ip_addr & 0x00ff0000) >> 16,
			(bd->bi_ip_addr & 0x0000ff00) >> 8,
			(bd->bi_ip_addr & 0x000000ff));
		setenv("ipaddr", str);
		printf("ip:    %s\n", str);
	}
#endif
	return (0);
}