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/*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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
*/
#if 0
#define DEBUG
#endif
#include <common.h>
#include <mpc8xx.h>
#include <i2c.h>
/*********************************************************************/
/* UPMA Pre Initilization Table by WV (Miron MT48LC16M16A2-7E B) */
/*********************************************************************/
const uint sdram_init_upm_table[] = {
/* SDRAM Initialisation Sequence (offset 0 in UPMA RAM) WV */
/* NOP - Precharge - AutoRefr - NOP - NOP */
/* NOP - AutoRefr - NOP */
/* NOP - NOP - LoadModeR - NOP - Active */
/* Position of Single Read */
0x0ffffc04, 0x0ff77c04, 0x0ff5fc04, 0x0ffffc04, 0x0ffffc04,
0x0ffffc04, 0x0ff5fc04, 0x0ffffc04,
/* Burst Read. (offset 8 in UPMA RAM) */
/* Cycle lent for Initialisation WV */
0x0ffffc04, 0x0ffffc34, 0x0f057c34, 0x0ffffc30, 0x1ff7fc05,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Single Write. (offset 18 in UPMA RAM) */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Burst Write. (offset 20 in UPMA RAM) */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Refresh (offset 30 in UPMA RAM) */
0x0FF77C04, 0x0FFFFC04, 0x0FF5FC84, 0x0FFFFC04, 0x0FFFFC04,
0x0FFFFC84, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF,
/* Exception. (offset 3c in UPMA RAM) */
0x7FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
};
/*********************************************************************/
/* UPMA initilization table. */
/*********************************************************************/
const uint sdram_upm_table[] = {
/* single read. (offset 0 in UPMA RAM) */
0x0F07FC04, 0x0FFFFC04, 0x00BDFC04, 0x0FF77C00, 0x1FFFFC05,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, /* 0x05-0x07 new WV */
/* Burst Read. (offset 8 in UPMA RAM) */
0x0F07FC04, 0x0FFFFC04, 0x00BDFC04, 0x00FFFC00, 0x00FFFC00,
0x00FFFC00, 0x0FF77C00, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Single Write. (offset 18 in UPMA RAM) */
0x0F07FC04, 0x0FFFFC00, 0x00BD7C04, 0x0FFFFC04, 0x0FF77C04,
0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF,
/* Burst Write. (offset 20 in UPMA RAM) */
0x0F07FC04, 0x0FFFFC00, 0x00BD7C00, 0x00FFFC00, 0x00FFFC00,
0x00FFFC04, 0x0FFFFC04, 0x0FF77C04, 0x1FFFFC05, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Refresh (offset 30 in UPMA RAM) */
0x0FF77C04, 0x0FFFFC04, 0x0FF5FC84, 0x0FFFFC04, 0x0FFFFC04,
0x0FFFFC84, 0x1FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF,
/* Exception. (offset 3c in UPMA RAM) */
0x7FFFFC05, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, /* 0x3C new WV */
};
/*********************************************************************/
/* UPMB initilization table. */
/*********************************************************************/
const uint mpm_upm_table[] = {
/* single read. (offset 0 in upm RAM) */
0x8FF00004, 0x0FF00004, 0x0FF81004, 0x1FF00001,
0x1FF00001, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* burst read. (Offset 8 in upm RAM) */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* single write. (Offset 0x18 in upm RAM) */
0x8FF00004, 0x0FF00004, 0x0FF81004, 0x0FF00004,
0x0FF00004, 0x1FF00001, 0xFFFFFFFF, 0xFFFFFFFF,
/* burst write. (Offset 0x20 in upm RAM) */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Refresh cycle, offset 0x30 */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Exception, 0ffset 0x3C */
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
};
int board_switch(void)
{
volatile pcmconf8xx_t *pcmp;
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
return ((pcmp->pcmc_pipr >> 24) & 0xf);
}
/*
* 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 UC100");
} else {
puts(str);
}
printf (" (SWITCH=%1X)\n", board_switch());
return 0;
}
/*
* Initialize SDRAM
*/
long int initdram (int board_type)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
/*---------------------------------------------------------------------*/
/* Initialize the UPMA/UPMB registers with the appropriate table. */
/*---------------------------------------------------------------------*/
upmconfig (UPMA, (uint *) sdram_init_upm_table,
sizeof (sdram_init_upm_table) / sizeof (uint));
upmconfig (UPMB, (uint *) mpm_upm_table,
sizeof (mpm_upm_table) / sizeof (uint));
/*---------------------------------------------------------------------*/
/* Memory Periodic Timer Prescaler: divide by 16 */
/*---------------------------------------------------------------------*/
memctl->memc_mptpr = 0x0200; /* Divide by 32 WV */
memctl->memc_mamr = CFG_MAMR_VAL & 0xFF7FFFFF; /* Bit 8 := "0" Kein Refresh WV */
memctl->memc_mbmr = CFG_MBMR_VAL;
/*---------------------------------------------------------------------*/
/* Initialize the Memory Controller registers, MPTPR, Chip Select 1 */
/* for SDRAM */
/* */
/* NOTE: The refresh rate in MAMR reg is set according to the lowest */
/* clock rate (16.67MHz) to allow proper operation for all ADS */
/* clock frequencies. */
/*---------------------------------------------------------------------*/
memctl->memc_or1 = CFG_OR1_PRELIM;
memctl->memc_br1 = CFG_BR1_PRELIM;
/*-------------------------------------------------------------------*/
/* Wait at least 200 usec for DRAM to stabilize, this magic number */
/* obtained from the init code. */
/*-------------------------------------------------------------------*/
udelay(200);
memctl->memc_mamr = (memctl->memc_mamr | 0x04) & ~0x08;
memctl->memc_br1 = CFG_BR1_PRELIM;
memctl->memc_or1 = CFG_OR1_PRELIM;
/*---------------------------------------------------------------------*/
/* run MRS command in location 5-8 of UPMB. */
/*---------------------------------------------------------------------*/
memctl->memc_mar = 0x88;
/* RUN UPMA on CS1 1-time from UPMA addr 0x05 */
memctl->memc_mcr = 0x80002100;
/* RUN UPMA on CS1 1-time from UPMA addr 0x00 WV */
udelay(200);
/*---------------------------------------------------------------------*/
/* Initialisation for normal access WV */
/*---------------------------------------------------------------------*/
/*---------------------------------------------------------------------*/
/* Initialize the UPMA register with the appropriate table. */
/*---------------------------------------------------------------------*/
upmconfig (UPMA, (uint *) sdram_upm_table,
sizeof (sdram_upm_table) / sizeof (uint));
/*---------------------------------------------------------------------*/
/* rerstore MBMR value (4-beat refresh burst.) */
/*---------------------------------------------------------------------*/
memctl->memc_mamr = CFG_MAMR_VAL | 0x00800000; /* Bit 8 := "1" Refresh Enable WV */
udelay(200);
return (64 * 1024 * 1024); /* fixed setup for 64MBytes! */
}
int misc_init_r (void)
{
uchar val;
/*
* Make sure that RTC has clock output enabled (triggers watchdog!)
*/
val = i2c_reg_read (CFG_I2C_RTC_ADDR, 0x0D);
val |= 0x80;
i2c_reg_write (CFG_I2C_RTC_ADDR, 0x0D, val);
return 0;
}
#ifdef CONFIG_POST
/*
* Returns 1 if keys pressed to start the power-on long-running tests
* Called from board_init_f().
*/
int post_hotkeys_pressed (void)
{
return 0; /* No hotkeys supported */
}
#endif
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