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/*
* (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 <commproc.h>
#include <mpc8xx.h>
/* ------------------------------------------------------------------------- */
static long int dram_size (long int, long int *, long int);
/* ------------------------------------------------------------------------- */
#define _NOT_USED_ 0xFFFFFFFF
const uint sdram_table[] = {
/*
* Single Read. (Offset 0 in UPMA RAM)
*/
0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
0x1ff77c47, /* last */
/*
* SDRAM Initialization (offset 5 in UPMA RAM)
*
* This is no UPM entry point. The following definition uses
* the remaining space to establish an initialization
* sequence, which is executed by a RUN command.
*
*/
0x1ff77c34, 0xefeabc34, 0x1fb57c35, /* last */
/*
* Burst Read. (Offset 8 in UPMA RAM)
*/
0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Single Write. (Offset 18 in UPMA RAM)
*/
0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Write. (Offset 20 in UPMA RAM)
*/
0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
0xf0affc00, 0xe1bbbc04, 0x1ff77c47, /* last */
_NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Refresh (Offset 30 in UPMA RAM)
*/
0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
0xfffffc84, 0xfffffc07, /* last */
_NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Exception. (Offset 3c in UPMA RAM)
*/
0x7ffffc07, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_,
};
/* ------------------------------------------------------------------------- */
/*
* Check Board Identity:
*
* Test ID string (IP860...)
*/
int checkboard (void)
{
unsigned char *s, *e;
unsigned char buf[64];
int i;
puts ("Board: ");
i = getenv_r ("serial#", buf, sizeof (buf));
s = (i > 0) ? buf : NULL;
if (!s || strncmp (s, "IP860", 5)) {
puts ("### No HW ID - assuming IP860");
} else {
for (e = s; *e; ++e) {
if (*e == ' ')
break;
}
for (; s < e; ++s) {
putc (*s);
}
}
putc ('\n');
return (0);
}
/* ------------------------------------------------------------------------- */
long int initdram (int board_type)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
long int size;
upmconfig (UPMA, (uint *) sdram_table,
sizeof (sdram_table) / sizeof (uint));
/*
* Preliminary prescaler for refresh
*/
memctl->memc_mptpr = 0x0400;
memctl->memc_mar = 0x00000088;
/*
* Map controller banks 2 to the SDRAM address
*/
memctl->memc_or2 = CFG_OR2;
memctl->memc_br2 = CFG_BR2;
/* IP860 boards have only one bank SDRAM */
udelay (200);
/* perform SDRAM initializsation sequence */
memctl->memc_mamr = 0xC3804114;
memctl->memc_mcr = 0x80004105; /* run precharge pattern from loc 5 */
udelay (1);
memctl->memc_mamr = 0xC3804118;
memctl->memc_mcr = 0x80004130; /* run refresh pattern 8 times */
udelay (1000);
/*
* Check SDRAM Memory Size
*/
size = dram_size (CFG_MAMR, (ulong *) SDRAM_BASE, SDRAM_MAX_SIZE);
udelay (1000);
memctl->memc_or2 = ((-size) & 0xFFFF0000) | SDRAM_TIMING;
memctl->memc_br2 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
udelay (10000);
/*
* Also, map other memory to correct position
*/
#if (defined(CFG_OR1) && defined(CFG_BR1_PRELIM))
memctl->memc_or1 = CFG_OR1;
memctl->memc_br1 = CFG_BR1;
#endif
#if defined(CFG_OR3) && defined(CFG_BR3)
memctl->memc_or3 = CFG_OR3;
memctl->memc_br3 = CFG_BR3;
#endif
#if defined(CFG_OR4) && defined(CFG_BR4)
memctl->memc_or4 = CFG_OR4;
memctl->memc_br4 = CFG_BR4;
#endif
#if defined(CFG_OR5) && defined(CFG_BR5)
memctl->memc_or5 = CFG_OR5;
memctl->memc_br5 = CFG_BR5;
#endif
#if defined(CFG_OR6) && defined(CFG_BR6)
memctl->memc_or6 = CFG_OR6;
memctl->memc_br6 = CFG_BR6;
#endif
#if defined(CFG_OR7) && defined(CFG_BR7)
memctl->memc_or7 = CFG_OR7;
memctl->memc_br7 = CFG_BR7;
#endif
return (size);
}
/* ------------------------------------------------------------------------- */
/*
* 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);
}
/* ------------------------------------------------------------------------- */
void reset_phy (void)
{
volatile immap_t *immr = (immap_t *) CFG_IMMR;
ulong mask = PB_ENET_RESET | PB_ENET_JABD;
ulong reg;
/* Make sure PHY is not in low-power mode */
immr->im_cpm.cp_pbpar &= ~(mask); /* GPIO */
immr->im_cpm.cp_pbodr &= ~(mask); /* active output */
/* Set JABD low (no JABber Disable),
* and RESET high (Reset PHY)
*/
reg = immr->im_cpm.cp_pbdat;
reg = (reg & ~PB_ENET_JABD) | PB_ENET_RESET;
immr->im_cpm.cp_pbdat = reg;
/* now drive outputs */
immr->im_cpm.cp_pbdir |= mask; /* output */
udelay (1000);
/*
* Release RESET signal
*/
immr->im_cpm.cp_pbdat &= ~(PB_ENET_RESET);
udelay (1000);
}
/* ------------------------------------------------------------------------- */