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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 <mpc8xx.h>
#include "fpga.h"
/* ------------------------------------------------------------------------- */
static long int dram_size (long int, long int *, long int);
unsigned long flash_init (void);
/* ------------------------------------------------------------------------- */
#define _NOT_USED_ 0xFFFFCC25
const uint sdram_table[] = {
/*
* Single Read. (Offset 00h in UPMA RAM)
*/
0x0F03CC04, 0x00ACCC24, 0x1FF74C20, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Read. (Offset 08h in UPMA RAM)
*/
0x0F03CC04, 0x00ACCC24, 0x00FFCC20, 0x00FFCC20,
0x01FFCC20, 0x1FF74C20, _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)
*/
0x0F03CC02, 0x00AC0C24, 0x1FF74C25, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Write. (Offset 20h in UPMA RAM)
*/
0x0F03CC00, 0x00AC0C20, 0x00FFFC20, 0x00FFFC22,
0x01FFFC24, 0x1FF74C25, _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)
* (Initialization code at 0x36)
*/
0x0FF0CC24, 0xFFFFCC24, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, 0xEFFB8C34, 0x0FF74C34,
0x0FFACCB4, 0x0FF5CC34, 0x0FFCC34, 0x0FFFCCB4,
/*
* Exception. (Offset 3Ch in UPMA RAM)
*/
0x0FEA8C34, 0x1FB54C34, 0xFFFFCC34, _NOT_USED_
};
/* ------------------------------------------------------------------------- */
/*
* Check Board Identity:
*/
int checkboard (void)
{
char buf[64];
int i;
int l = getenv_f("serial#", buf, sizeof(buf));
puts ("Board QUANTUM, Serial No: ");
for (i = 0; i < l; ++i) {
if (buf[i] == ' ')
break;
putc (buf[i]);
}
putc ('\n');
return (0); /* success */
}
/* ------------------------------------------------------------------------- */
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 size9;
upmconfig (UPMA, (uint *) sdram_table,
sizeof (sdram_table) / sizeof (uint));
/* Refresh clock prescalar */
memctl->memc_mptpr = CONFIG_SYS_MPTPR;
memctl->memc_mar = 0x00000088;
/* Map controller banks 1 to the SDRAM bank */
memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
memctl->memc_mamr = CONFIG_SYS_MAMR_9COL & (~(MAMR_PTAE)); /* no refresh yet */
udelay (200);
/* perform SDRAM initializsation sequence */
memctl->memc_mcr = 0x80002136; /* SDRAM bank 0 */
udelay (1);
memctl->memc_mamr |= MAMR_PTAE; /* enable refresh */
udelay (1000);
/* Check Bank 0 Memory Size,
* 9 column mode
*/
size9 = dram_size (CONFIG_SYS_MAMR_9COL, (long *) SDRAM_BASE_PRELIM,
SDRAM_MAX_SIZE);
/*
* Final mapping:
*/
memctl->memc_or1 = ((-size9) & 0xFFFF0000) | CONFIG_SYS_OR_TIMING_SDRAM;
udelay (1000);
return (size9);
}
/* ------------------------------------------------------------------------- */
/*
* 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 *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
volatile ulong *addr;
ulong cnt, val, size;
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 = (volatile ulong *)(base + cnt); /* pointer arith! */
save[i++] = *addr;
*addr = ~cnt;
}
/* write 0 to base address */
addr = (volatile ulong *)base;
save[i] = *addr;
*addr = 0;
/* check at base address */
if ((val = *addr) != 0) {
/* Restore the original data before leaving the function.
*/
*addr = save[i];
for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
addr = (volatile ulong *) base + cnt;
*addr = save[--i];
}
return (0);
}
for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
addr = (volatile ulong *)(base + cnt); /* pointer arith! */
val = *addr;
*addr = save[--i];
if (val != (~cnt)) {
size = cnt * sizeof (long);
/* Restore the original data before returning
*/
for (cnt <<= 1; cnt <= maxsize / sizeof (long);
cnt <<= 1) {
addr = (volatile ulong *) base + cnt;
*addr = save[--i];
}
return (size);
}
}
return (maxsize);
}
/*
* Miscellaneous intialization
*/
int misc_init_r (void)
{
char *fpga_data_str = getenv ("fpgadata");
char *fpga_size_str = getenv ("fpgasize");
void *fpga_data;
int fpga_size;
int status;
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
int flash_size;
/* Remap FLASH according to real size */
flash_size = flash_init ();
memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-flash_size & 0xFFFF8000);
memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
if (fpga_data_str && fpga_size_str) {
fpga_data = (void *) simple_strtoul (fpga_data_str, NULL, 16);
fpga_size = simple_strtoul (fpga_size_str, NULL, 10);
status = fpga_boot (fpga_data, fpga_size);
if (status != 0) {
printf ("\nFPGA: Booting failed ");
switch (status) {
case ERROR_FPGA_PRG_INIT_LOW:
printf ("(Timeout: INIT not low after asserting PROGRAM*)\n ");
break;
case ERROR_FPGA_PRG_INIT_HIGH:
printf ("(Timeout: INIT not high after deasserting PROGRAM*)\n ");
break;
case ERROR_FPGA_PRG_DONE:
printf ("(Timeout: DONE not high after programming FPGA)\n ");
break;
}
}
}
return 0;
}
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