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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2004
* Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
*
* (C) Copyright 2010
* Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com.
*
* 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 <mpc5xxx.h>
#include <pci.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <libfdt.h>
#include <netdev.h>
#include "mt46v32m16.h"
#ifndef CONFIG_SYS_RAMBOOT
static void sdram_start (int hi_addr)
{
long hi_addr_bit = hi_addr ? 0x01000000 : 0;
long control = SDRAM_CONTROL | hi_addr_bit;
/* unlock mode register */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000000);
__asm__ volatile ("sync");
/* precharge all banks */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
__asm__ volatile ("sync");
#if SDRAM_DDR
/* set mode register: extended mode */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_EMODE);
__asm__ volatile ("sync");
/* set mode register: reset DLL */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE | 0x04000000);
__asm__ volatile ("sync");
#endif
/* precharge all banks */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
__asm__ volatile ("sync");
/* auto refresh */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000004);
__asm__ volatile ("sync");
/* set mode register */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE);
__asm__ volatile ("sync");
/* normal operation */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control);
__asm__ volatile ("sync");
}
#endif
/*
* ATTENTION: Although partially referenced initdram does NOT make real use
* use of CONFIG_SYS_SDRAM_BASE. The code does not work if CONFIG_SYS_SDRAM_BASE
* is something else than 0x00000000.
*/
phys_size_t initdram (int board_type)
{
ulong dramsize = 0;
uint svr, pvr;
#ifndef CONFIG_SYS_RAMBOOT
ulong test1, test2;
/* setup SDRAM chip selects */
out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0x0000001e); /* 2GB at 0x0 */
out_be32((void *)MPC5XXX_SDRAM_CS1CFG, 0x80000000); /* disabled */
__asm__ volatile ("sync");
/* setup config registers */
out_be32((void *)MPC5XXX_SDRAM_CONFIG1, SDRAM_CONFIG1);
out_be32((void *)MPC5XXX_SDRAM_CONFIG2, SDRAM_CONFIG2);
__asm__ volatile ("sync");
#if SDRAM_DDR
/* set tap delay */
out_be32((void *)MPC5XXX_CDM_PORCFG, SDRAM_TAPDELAY);
__asm__ volatile ("sync");
#endif
/* find RAM size using SDRAM CS0 only */
sdram_start(0);
test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
sdram_start(1);
test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
if (test1 > test2) {
sdram_start(0);
dramsize = test1;
} else {
dramsize = test2;
}
/* memory smaller than 1MB is impossible */
if (dramsize < (1 << 20)) {
dramsize = 0;
}
/* set SDRAM CS0 size according to the amount of RAM found */
if (dramsize > 0) {
out_be32((void *)MPC5XXX_SDRAM_CS0CFG,
0x13 + __builtin_ffs(dramsize >> 20) - 1);
} else {
out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0); /* disabled */
}
#else /* CONFIG_SYS_RAMBOOT */
/* retrieve size of memory connected to SDRAM CS0 */
dramsize = in_be32((void *)MPC5XXX_SDRAM_CS0CFG) & 0xFF;
if (dramsize >= 0x13) {
dramsize = (1 << (dramsize - 0x13)) << 20;
} else {
dramsize = 0;
}
#endif /* CONFIG_SYS_RAMBOOT */
/*
* On MPC5200B we need to set the special configuration delay in the
* DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM
* Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
*
* "The SDelay should be written to a value of 0x00000004. It is
* required to account for changes caused by normal wafer processing
* parameters."
*/
svr = get_svr();
pvr = get_pvr();
if ((SVR_MJREV(svr) >= 2) &&
(PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) {
out_be32((void *)MPC5XXX_SDRAM_SDELAY, 0x04);
__asm__ volatile ("sync");
}
return dramsize;
}
int checkboard (void)
{
puts ("Board: A4M072\n");
return 0;
}
#ifdef CONFIG_PCI
static struct pci_controller hose;
extern void pci_mpc5xxx_init(struct pci_controller *);
void pci_init_board(void)
{
pci_mpc5xxx_init(&hose);
}
#endif
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
void
ft_board_setup(void *blob, bd_t *bd)
{
ft_cpu_setup(blob, bd);
}
#endif
int board_eth_init(bd_t *bis)
{
int rv, num_if = 0;
/* Initialize TSECs first */
if ((rv = cpu_eth_init(bis)) >= 0)
num_if += rv;
else
printf("ERROR: failed to initialize FEC.\n");
if ((rv = pci_eth_init(bis)) >= 0)
num_if += rv;
else
printf("ERROR: failed to initialize PCI Ethernet.\n");
return num_if;
}
/*
* Miscellaneous late-boot configurations
*
* Initialize EEPROM write-protect GPIO pin.
*/
int misc_init_r(void)
{
#if defined(CONFIG_SYS_EEPROM_WREN)
/* Enable GPIO pin */
setbits_be32((void *)MPC5XXX_WU_GPIO_ENABLE, CONFIG_SYS_EEPROM_WP);
/* Set direction, output */
setbits_be32((void *)MPC5XXX_WU_GPIO_DIR, CONFIG_SYS_EEPROM_WP);
/* De-assert write enable */
setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
#endif
return 0;
}
#if defined(CONFIG_SYS_EEPROM_WREN)
/* Input: <dev_addr> I2C address of EEPROM device to enable.
* <state> -1: deliver current state
* 0: disable write
* 1: enable write
* Returns: -1: wrong device address
* 0: dis-/en- able done
* 0/1: current state if <state> was -1.
*/
int eeprom_write_enable (unsigned dev_addr, int state)
{
if (CONFIG_SYS_I2C_EEPROM_ADDR != dev_addr) {
return -1;
} else {
switch (state) {
case 1:
/* Enable write access */
clrbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
state = 0;
break;
case 0:
/* Disable write access */
setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
state = 0;
break;
default:
/* Read current status back. */
state = (0 == (in_be32((void *)MPC5XXX_WU_GPIO_DATA_O) &
CONFIG_SYS_EEPROM_WP));
break;
}
}
return state;
}
#endif
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