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/*
* (C) Copyright 2001
* Stäubli Faverges - <www.staubli.com>
* Pierre AUBERT p.aubert@staubli.com
* U-Boot port on RPXClassic LF (CLLF_BW31) board
*
* (C) Copyright 2000
* 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
*/
#include <common.h>
#include <i2c.h>
#include <config.h>
#include <mpc8xx.h>
/* ------------------------------------------------------------------------- */
static long int dram_size (long int, long int *, long int);
static unsigned char aschex_to_byte (unsigned char *cp);
/* ------------------------------------------------------------------------- */
#define _NOT_USED_ 0xFFFFCC25
const uint sdram_table[] =
{
/*
* Single Read. (Offset 00h in UPMA RAM)
*/
0xCFFFCC24, 0x0FFFCC04, 0X0CAFCC04, 0X03AFCC08,
0x3FBFCC27, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Read. (Offset 08h in UPMA RAM)
*/
0xCFFFCC24, 0x0FFFCC04, 0x0CAFCC84, 0x03AFCC88,
0x3FBFCC27, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Single Write. (Offset 18h in UPMA RAM)
*/
0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC04, 0x03FFCC00,
0x3FFFCC27, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Write. (Offset 20h in UPMA RAM)
*/
0xCFFFCC24, 0x0FFFCC04, 0x0CFFCC80, 0x03FFCC8C,
0x0CFFCC00, 0x33FFCC27, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_,
/*
* Refresh. (Offset 30h in UPMA RAM)
*/
0xC0FFCC24, 0x03FFCC24, 0x0FFFCC24, 0x0FFFCC24,
0x3FFFCC27, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Exception. (Offset 3Ch in UPMA RAM)
*/
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_
};
/* ------------------------------------------------------------------------- */
/*
* Check Board Identity:
*/
int checkboard (void)
{
puts ("Board: RPXClassic\n");
return (0);
}
/*-----------------------------------------------------------------------------
* board_get_enetaddr -- Read the MAC Address in the I2C EEPROM
*-----------------------------------------------------------------------------
*/
void board_get_enetaddr (uchar * enet)
{
int i;
char buff[256], *cp;
/* Initialize I2C */
i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
/* Read 256 bytes in EEPROM */
i2c_read (0x54, 0, 1, buff, 128);
i2c_read (0x54, 128, 1, buff + 128, 128);
/* Retrieve MAC address in buffer (key EA) */
for (cp = buff;;) {
if (cp[0] == 'E' && cp[1] == 'A') {
cp += 3;
/* Read MAC address */
for (i = 0; i < 6; i++, cp += 2) {
enet[i] = aschex_to_byte (cp);
}
}
/* Scan to the end of the record */
while ((*cp != '\n') && (*cp != (char)0xff)) {
cp++;
}
/* If the next character is a \n, 0 or ff, we are done. */
cp++;
if ((*cp == '\n') || (*cp == 0) || (*cp == (char)0xff))
break;
}
#ifdef CONFIG_FEC_ENET
/* The MAC address is the same as normal ethernet except the 3rd byte */
/* (See the E.P. Planet Core Overview manual */
enet[3] |= 0x80;
#endif
printf ("MAC address = %02x:%02x:%02x:%02x:%02x:%02x\n",
enet[0], enet[1], enet[2], enet[3], enet[4], enet[5]);
}
void rpxclassic_init (void)
{
/* Enable NVRAM */
*((uchar *) BCSR0) |= BCSR0_ENNVRAM;
#ifdef CONFIG_FEC_ENET
/* Validate the fast ethernet tranceiver */
*((volatile uchar *) BCSR2) &= ~BCSR2_MIICTL;
*((volatile uchar *) BCSR2) &= ~BCSR2_MIIPWRDWN;
*((volatile uchar *) BCSR2) |= BCSR2_MIIRST;
*((volatile uchar *) BCSR2) |= BCSR2_MIIPWRDWN;
#endif
}
/* ------------------------------------------------------------------------- */
long int initdram (int board_type)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
long int size10;
upmconfig (UPMA, (uint *) sdram_table,
sizeof (sdram_table) / sizeof (uint));
/* Refresh clock prescalar */
memctl->memc_mptpr = CFG_MPTPR;
memctl->memc_mar = 0x00000000;
/* Map controller banks 1 to the SDRAM bank */
memctl->memc_or1 = CFG_OR1_PRELIM;
memctl->memc_br1 = CFG_BR1_PRELIM;
memctl->memc_mamr = CFG_MAMR_10COL & (~(MAMR_PTAE)); /* no refresh yet */
udelay (200);
/* perform SDRAM initializsation sequence */
memctl->memc_mcr = 0x80002230; /* SDRAM bank 0 - refresh twice */
udelay (1);
memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
udelay (1000);
/* Check Bank 0 Memory Size
* try 10 column mode
*/
size10 = dram_size (CFG_MAMR_10COL, (ulong *) SDRAM_BASE_PRELIM,
SDRAM_MAX_SIZE);
return (size10);
}
/* ------------------------------------------------------------------------- */
/*
* Check memory range for valid RAM. A simple memory test determines
* the actually available RAM size between addresses `base' and
* `base + maxsize'. Some (not all) hardware errors are detected:
* - short between address lines
* - short between data lines
*/
static long int dram_size (long int mamr_value, long int *base, long int maxsize)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
volatile long int *addr;
ulong cnt, val;
ulong save[32]; /* to make test non-destructive */
unsigned char i = 0;
memctl->memc_mamr = mamr_value;
for (cnt = maxsize / sizeof (long); cnt > 0; cnt >>= 1) {
addr = base + cnt; /* pointer arith! */
save[i++] = *addr;
*addr = ~cnt;
}
/* write 0 to base address */
addr = base;
save[i] = *addr;
*addr = 0;
/* check at base address */
if ((val = *addr) != 0) {
*addr = save[i];
return (0);
}
for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
addr = base + cnt; /* pointer arith! */
val = *addr;
*addr = save[--i];
if (val != (~cnt)) {
return (cnt * sizeof (long));
}
}
return (maxsize);
}
/*-----------------------------------------------------------------------------
* aschex_to_byte --
*-----------------------------------------------------------------------------
*/
static unsigned char aschex_to_byte (unsigned char *cp)
{
u_char byte, c;
c = *cp++;
if ((c >= 'A') && (c <= 'F')) {
c -= 'A';
c += 10;
} else if ((c >= 'a') && (c <= 'f')) {
c -= 'a';
c += 10;
} else {
c -= '0';
}
byte = c * 16;
c = *cp;
if ((c >= 'A') && (c <= 'F')) {
c -= 'A';
c += 10;
} else if ((c >= 'a') && (c <= 'f')) {
c -= 'a';
c += 10;
} else {
c -= '0';
}
byte += c;
return (byte);
}
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