km8xx.c

uboot200903最新版本的通用uboot

/*
 * (C) Copyright 2007
 * Heiko Schocher, DENX Software Engineering, [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 <mpc8xx.h>
#include <net.h>
#include <asm/io.h>

#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
#include <libfdt.h>
#endif

#include "../common/common.h"

DECLARE_GLOBAL_DATA_PTR;

const uint sdram_table[] =
{
	0x0f07fc04, 0x0ffffc04, 0x00bdfc04, 0x0ff77c00,
	0x1ffffc05, 0xfffffc04, 0xfffffc04, 0xfffffc04,
	/* 0x08 Burst Read */
	0x0f07fc04, 0x0ffffc04, 0x00bdfc04, 0x00fffc00,
	0x00fffc00, 0x00fffc00, 0x0ff77c00, 0x1ffffc05,
	/* 0x10 Load mode register */
	0x0ffffc34, 0x0ff57c04, 0x0ffffc04, 0x1ffffc05,
	0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
	/* 0x18 Single Write */
	0x0f07fc04, 0x0ffffc00, 0x00bd7c04, 0x0ffffc04,
	0x0ff77c04, 0x1ffffc05, 0xfffffc04, 0xfffffc04,
	/* 0x20 Burst Write */
	0x0f07fc04, 0x0ffffc00, 0x00bd7c00, 0x00fffc00,
	0x00fffc00, 0x00fffc04, 0x0ffffc04, 0x0ff77c04,
	0x1ffffc05, 0xfffffc04, 0xfffffc04, 0xfffffc04,
	0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
	/* 0x30 Precharge all and Refresh */
	0x0ff77c04, 0x0ffffc04, 0x0ff5fc84, 0x0ffffc04,
	0x0ffffc04, 0x0ffffc84, 0x1ffffc05, 0xfffffc04,
	0xfffffc04, 0xfffffc04, 0xfffffc04, 0xfffffc04,
	/* 0x3C Exception */
	0x7ffffc04, 0xfffffc07, 0xfffffc04, 0xfffffc04,
};

int checkboard (void)
{
	puts ("Board: Keymile ");
#if defined(CONFIG_KMSUPX4)
	puts ("kmsupx4");
#else
	puts ("mgsuvd");
#endif
	if (ethernet_present ())
		puts (" with PIGGY.");
	puts ("\n");
	return (0);
}

phys_size_t initdram (int board_type)
{
	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	long int size;

	upmconfig (UPMB, (uint *) sdram_table,
			   sizeof (sdram_table) / sizeof (uint));

	/*
	 * Preliminary prescaler for refresh (depends on number of
	 * banks): This value is selected for four cycles every 62.4 us
	 * with two SDRAM banks or four cycles every 31.2 us with one
	 * bank. It will be adjusted after memory sizing.
	 */
	memctl->memc_mptpr = CONFIG_SYS_MPTPR;

	/*
	 * The following value is used as an address (i.e. opcode) for
	 * the LOAD MODE REGISTER COMMAND during SDRAM initialisation. If
	 * the port size is 32bit the SDRAM does NOT "see" the lower two
	 * address lines, i.e. mar=0x00000088 -> opcode=0x00000022 for
	 * MICRON SDRAMs:
	 * ->    0 00 010 0 010
	 *       |  |   | |   +- Burst Length = 4
	 *       |  |   | +----- Burst Type   = Sequential
	 *       |  |   +------- CAS Latency  = 2
	 *       |  +----------- Operating Mode = Standard
	 *       +-------------- Write Burst Mode = Programmed Burst Length
	 */
	memctl->memc_mar = CONFIG_SYS_MAR;

	/*
	 * Map controller banks 1 to the SDRAM banks 1 at
	 * preliminary addresses - these have to be modified after the
	 * SDRAM size has been determined.
	 */
	memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
	memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;

	memctl->memc_mbmr = CONFIG_SYS_MBMR & (~(MBMR_PTBE));	/* no refresh yet */

	udelay (200);

	/* perform SDRAM initializsation sequence */

	memctl->memc_mcr = 0x80802830;	/* SDRAM bank 0 */
	udelay (1);
	memctl->memc_mcr = 0x80802110;	/* SDRAM bank 0 - execute twice */
	udelay (1);

	memctl->memc_mbmr |= MBMR_PTBE;	/* enable refresh */

	udelay (1000);

	/*
	 * Check Bank 0 Memory Size for re-configuration
	 *
	 */
	size =  get_ram_size(SDRAM_BASE1_PRELIM, SDRAM_MAX_SIZE);

	udelay (1000);

	debug ("SDRAM Bank 0: %ld MB\n", size >> 20);

	return (size);
}

/*
 * Early board initalization.
 */
int board_early_init_r(void)
{
	/* setup the UPIOx */
	out_8((u8 *)(CONFIG_SYS_PIGGY_BASE + 0x02), 0xc0);
	out_8((u8 *)(CONFIG_SYS_PIGGY_BASE + 0x03), 0x35);
	return 0;
}

int hush_init_var (void)
{
	ivm_read_eeprom ();
	return 0;
}

#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
extern int fdt_set_node_and_value (void *blob,
				char *nodename,
				char *regname,
				void *var,
				int size);

/*
 * update "memory" property in the blob
 */
void ft_blob_update (void *blob, bd_t *bd)
{
	ulong brg_data[1] = {0};
	ulong memory_data[2] = {0};
	ulong flash_data[4] = {0};
	ulong flash_reg[3] = {0};

	memory_data[0] = cpu_to_be32 (bd->bi_memstart);
	memory_data[1] = cpu_to_be32 (bd->bi_memsize);
	fdt_set_node_and_value (blob, "/memory", "reg", memory_data,
				sizeof (memory_data));

	flash_data[2] = cpu_to_be32 (bd->bi_flashstart);
	flash_data[3] = cpu_to_be32 (bd->bi_flashsize);
	fdt_set_node_and_value (blob, "/localbus", "ranges", flash_data,
				sizeof (flash_data));

	flash_reg[2] = cpu_to_be32 (bd->bi_flashsize);
	fdt_set_node_and_value (blob, "/localbus/flash@0,0", "reg", flash_reg,
				sizeof (flash_reg));

	/* BRG */
	brg_data[0] = cpu_to_be32 (bd->bi_busfreq);
	fdt_set_node_and_value (blob, "/soc/cpm", "brg-frequency", brg_data,
				sizeof (brg_data));

	/* MAC adr */
	fdt_set_node_and_value (blob, "/soc/cpm/ethernet", "mac-address",
				bd->bi_enetaddr, sizeof (u8) * 6);
}

void ft_board_setup(void *blob, bd_t *bd)
{
	ft_cpu_setup (blob, bd);
	ft_blob_update (blob, bd);
}
#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */

int i2c_soft_read_pin (void)
{
	int val;

	*(unsigned short *)(I2C_BASE_DIR) &=  ~SDA_CONF;
	udelay(1);
	val = *(unsigned char *)(I2C_BASE_PORT);

	return ((val & SDA_BIT) == SDA_BIT);
}