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uboot-1.1.4-kirkwood/board/fads/fads.c

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u-boot 1.1.4
2024-01-07 23:57:24 +01:00
/*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Modified by, Yuli Barcohen, Arabella Software Ltd., yuli@arabellasw.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 <config.h>
#include <common.h>
#include <mpc8xx.h>
#include <pcmcia.h>
#define _NOT_USED_ 0xFFFFFFFF
/* ========================================================================= */
#ifndef CONFIG_MPC885ADS /* No old DRAM on MPC885ADS */
#if defined(CONFIG_DRAM_50MHZ)
/* 50MHz tables */
static const uint dram_60ns[] =
{ 0x8fffec24, 0x0fffec04, 0x0cffec04, 0x00ffec04,
0x00ffec00, 0x37ffec47, _NOT_USED_, _NOT_USED_,
0x8fffec24, 0x0fffec04, 0x08ffec04, 0x00ffec0c,
0x03ffec00, 0x00ffec44, 0x00ffcc08, 0x0cffcc44,
0x00ffec0c, 0x03ffec00, 0x00ffec44, 0x00ffcc00,
0x3fffc847, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x11bfcc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x33bfcc4f, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0xc0ffcc84, 0x00ffcc04, 0x07ffcc04, 0x3fffcc06,
0xffffcc85, 0xffffcc05, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
static const uint dram_70ns[] =
{ 0x8fffcc24, 0x0fffcc04, 0x0cffcc04, 0x00ffcc04,
0x00ffcc00, 0x37ffcc47, _NOT_USED_, _NOT_USED_,
0x8fffcc24, 0x0fffcc04, 0x0cffcc04, 0x00ffcc04,
0x00ffcc08, 0x0cffcc44, 0x00ffec0c, 0x03ffec00,
0x00ffec44, 0x00ffcc08, 0x0cffcc44, 0x00ffec04,
0x00ffec00, 0x3fffec47, _NOT_USED_, _NOT_USED_,
0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x11bfcc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x8fafcc24, 0x0fafcc04, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x33bfcc4f, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0xe0ffcc84, 0x00ffcc04, 0x00ffcc04, 0x0fffcc04,
0x7fffcc06, 0xffffcc85, 0xffffcc05, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
static const uint edo_60ns[] =
{ 0x8ffbec24, 0x0ff3ec04, 0x0cf3ec04, 0x00f3ec04,
0x00f3ec00, 0x37f7ec47, _NOT_USED_, _NOT_USED_,
0x8fffec24, 0x0ffbec04, 0x0cf3ec04, 0x00f3ec0c,
0x0cf3ec00, 0x00f3ec4c, 0x0cf3ec00, 0x00f3ec4c,
0x0cf3ec00, 0x00f3ec44, 0x03f3ec00, 0x3ff7ec47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x11bfcc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x33bfcc4f, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0xc0ffcc84, 0x00ffcc04, 0x07ffcc04, 0x3fffcc06,
0xffffcc85, 0xffffcc05, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
static const uint edo_70ns[] =
{ 0x8ffbcc24, 0x0ff3cc04, 0x0cf3cc04, 0x00f3cc04,
0x00f3cc00, 0x37f7cc47, _NOT_USED_, _NOT_USED_,
0x8fffcc24, 0x0ffbcc04, 0x0cf3cc04, 0x00f3cc0c,
0x03f3cc00, 0x00f3cc44, 0x00f3ec0c, 0x0cf3ec00,
0x00f3ec4c, 0x03f3ec00, 0x00f3ec44, 0x00f3cc00,
0x33f7cc47, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x11bfcc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x8fffcc24, 0x0fefcc04, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x03afcc4c, 0x0cafcc00, 0x03afcc4c,
0x0cafcc00, 0x33bfcc47, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0xe0ffcc84, 0x00ffcc04, 0x00ffcc04, 0x0fffcc04,
0x7fffcc04, 0xffffcc86, 0xffffcc05, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
#elif defined(CONFIG_DRAM_25MHZ)
/* 25MHz tables */
static const uint dram_60ns[] =
{ 0x0fffcc04, 0x08ffcc00, 0x33ffcc47, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fffcc24, 0x0fffcc04, 0x08ffcc00, 0x03ffcc4c,
0x08ffcc00, 0x03ffcc4c, 0x08ffcc00, 0x03ffcc4c,
0x08ffcc00, 0x33ffcc47, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fafcc04, 0x08afcc00, 0x3fbfcc47, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fafcc04, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
0x01afcc4c, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
0x31bfcc43, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x80ffcc84, 0x13ffcc04, 0xffffcc87, 0xffffcc05,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
static const uint dram_70ns[] =
{ 0x0fffec04, 0x08ffec04, 0x00ffec00, 0x3fffcc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fffcc24, 0x0fffcc04, 0x08ffcc00, 0x03ffcc4c,
0x08ffcc00, 0x03ffcc4c, 0x08ffcc00, 0x03ffcc4c,
0x08ffcc00, 0x33ffcc47, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fafcc04, 0x08afcc00, 0x3fbfcc47, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fafcc04, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
0x01afcc4c, 0x0cafcc00, 0x01afcc4c, 0x0cafcc00,
0x31bfcc43, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0xc0ffcc84, 0x01ffcc04, 0x7fffcc86, 0xffffcc05,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
static const uint edo_60ns[] =
{ 0x0ffbcc04, 0x0cf3cc04, 0x00f3cc00, 0x33f7cc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0ffbcc04, 0x09f3cc0c, 0x09f3cc0c, 0x09f3cc0c,
0x08f3cc00, 0x3ff7cc47, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fefcc04, 0x08afcc04, 0x00afcc00, 0x3fbfcc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fefcc04, 0x08afcc00, 0x07afcc48, 0x08afcc48,
0x08afcc48, 0x39bfcc47, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x80ffcc84, 0x13ffcc04, 0xffffcc87, 0xffffcc05,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
static const uint edo_70ns[] =
{ 0x0ffbcc04, 0x0cf3cc04, 0x00f3cc00, 0x33f7cc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0ffbec04, 0x08f3ec04, 0x03f3ec48, 0x08f3cc00,
0x0ff3cc4c, 0x08f3cc00, 0x0ff3cc4c, 0x08f3cc00,
0x3ff7cc47, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fefcc04, 0x08afcc04, 0x00afcc00, 0x3fbfcc47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x0fefcc04, 0x08afcc00, 0x07afcc4c, 0x08afcc00,
0x07afcc4c, 0x08afcc00, 0x07afcc4c, 0x08afcc00,
0x37bfcc47, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0xc0ffcc84, 0x01ffcc04, 0x7fffcc86, 0xffffcc05,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
0x33ffcc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
#else
#error dram not correctly defined - use CONFIG_DRAM_25MHZ or CONFIG_DRAM_50MHZ
#endif
/* ------------------------------------------------------------------------- */
static int _draminit (uint base, uint noMbytes, uint edo, uint delay)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
/* init upm */
switch (delay) {
case 70:
if (edo) {
upmconfig (UPMA, (uint *) edo_70ns,
sizeof (edo_70ns) / sizeof (uint));
} else {
upmconfig (UPMA, (uint *) dram_70ns,
sizeof (dram_70ns) / sizeof (uint));
}
break;
case 60:
if (edo) {
upmconfig (UPMA, (uint *) edo_60ns,
sizeof (edo_60ns) / sizeof (uint));
} else {
upmconfig (UPMA, (uint *) dram_60ns,
sizeof (dram_60ns) / sizeof (uint));
}
break;
default:
return -1;
}
memctl->memc_mptpr = 0x0400; /* divide by 16 */
switch (noMbytes) {
case 4: /* 4 Mbyte uses only CS2 */
#ifdef CONFIG_ADS
memctl->memc_mamr = 0xc0a21114;
#else
memctl->memc_mamr = 0x13a01114; /* PTA 0x13 AMA 010 */
#endif
memctl->memc_or2 = 0xffc00800; /* 4M */
break;
case 8: /* 8 Mbyte uses both CS3 and CS2 */
memctl->memc_mamr = 0x13a01114; /* PTA 0x13 AMA 010 */
memctl->memc_or3 = 0xffc00800; /* 4M */
memctl->memc_br3 = 0x00400081 + base;
memctl->memc_or2 = 0xffc00800; /* 4M */
break;
case 16: /* 16 Mbyte uses only CS2 */
#ifdef CONFIG_ADS /* XXX: why PTA=0x60 only in 16M case? - NTL */
memctl->memc_mamr = 0x60b21114; /* PTA 0x60 AMA 011 */
#else
memctl->memc_mamr = 0x13b01114; /* PTA 0x13 AMA 011 */
#endif
memctl->memc_or2 = 0xff000800; /* 16M */
break;
case 32: /* 32 Mbyte uses both CS3 and CS2 */
memctl->memc_mamr = 0x13b01114; /* PTA 0x13 AMA 011 */
memctl->memc_or3 = 0xff000800; /* 16M */
memctl->memc_br3 = 0x01000081 + base;
memctl->memc_or2 = 0xff000800; /* 16M */
break;
default:
return -1;
}
memctl->memc_br2 = 0x81 + base; /* use upma */
*((uint *) BCSR1) &= ~BCSR1_DRAM_EN; /* enable dram */
/* if no dimm is inserted, noMbytes is still detected as 8m, so
* sanity check top and bottom of memory */
/* check bytes / 2 because get_ram_size tests at base+bytes, which
* is not mapped */
if (noMbytes == 8)
if (get_ram_size ((long *) base, noMbytes << 19) != noMbytes << 19) {
*((uint *) BCSR1) |= BCSR1_DRAM_EN; /* disable dram */
return -1;
}
return 0;
}
/* ------------------------------------------------------------------------- */
static void _dramdisable(void)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
memctl->memc_br2 = 0x00000000;
memctl->memc_br3 = 0x00000000;
/* maybe we should turn off upma here or something */
}
#endif /* !CONFIG_MPC885ADS */
/* ========================================================================= */
#ifdef CONFIG_FADS /* SDRAM exists on FADS and newer boards */
#if defined(CONFIG_SDRAM_100MHZ)
/* ------------------------------------------------------------------------- */
/* sdram table by Dan Malek */
/* This has the stretched early timing so the 50 MHz
* processor can make the 100 MHz timing. This will
* work at all processor speeds.
*/
#ifdef SDRAM_ALT_INIT_SEQENCE
# define SDRAM_MBMRVALUE0 0xc3802114 /* PTx=195,PTxE,AMx=0,DSx=1,A11,RLFx=1,WLFx=1,TLFx=4 */
#define SDRAM_MBMRVALUE1 SDRAM_MBMRVALUE0
# define SDRAM_MCRVALUE0 0x80808111 /* run upmb cs4 loop 1 addr 0x11 MRS */
# define SDRAM_MCRVALUE1 SDRAM_MCRVALUE0 /* ??? why not 0x80808130? */
#else
# define SDRAM_MxMR_PTx 195
# define UPM_MRS_ADDR 0x11
# define UPM_REFRESH_ADDR 0x30 /* or 0x11 if we want to be like above? */
#endif /* !SDRAM_ALT_INIT_SEQUENCE */
static const uint sdram_table[] =
{
/* single read. (offset 0 in upm RAM) */
0xefebfc24, 0x1f07fc24, 0xeeaefc04, 0x11adfc04,
0xefbbbc00, 0x1ff77c45, _NOT_USED_, _NOT_USED_,
/* burst read. (offset 8 in upm RAM) */
0xefebfc24, 0x1f07fc24, 0xeeaefc04, 0x10adfc04,
0xf0affc00, 0xf0affc00, 0xf1affc00, 0xefbbbc00,
0x1ff77c45,
/* precharge + MRS. (offset 11 in upm RAM) */
0xeffbbc04, 0x1ff77c34, 0xefeabc34,
0x1fb57c35, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* single write. (offset 18 in upm RAM) */
0xefebfc24, 0x1f07fc24, 0xeeaebc00, 0x01b93c04,
0x1ff77c45, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* burst write. (offset 20 in upm RAM) */
0xefebfc24, 0x1f07fc24, 0xeeaebc00, 0x10ad7c00,
0xf0affc00, 0xf0affc00, 0xe1bbbc04, 0x1ff77c45,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* refresh. (offset 30 in upm RAM) */
0xeffafc84, 0x1ff5fc04, 0xfffffc04, 0xfffffc04,
0xfffffc84, 0xfffffc07, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* exception. (offset 3c in upm RAM) */
0xeffffc06, 0x1ffffc07, _NOT_USED_, _NOT_USED_ };
#elif defined(CONFIG_SDRAM_50MHZ)
/* ------------------------------------------------------------------------- */
/* sdram table stolen from the fads manual */
/* for chip MB811171622A-100 */
/* this table is for 32-50MHz operation */
#ifdef SDRAM_ALT_INIT_SEQENCE
# define SDRAM_MBMRVALUE0 0x80802114 /* PTx=128,PTxE,AMx=0,DSx=1,A11,RLFx=1,WLFx=1,TLFx=4 */
# define SDRAM_MBMRVALUE1 0x80802118 /* PTx=128,PTxE,AMx=0,DSx=1,A11,RLFx=1,WLFx=1,TLFx=8 */
# define SDRAM_MCRVALUE0 0x80808105 /* run upmb cs4 loop 1 addr 0x5 MRS */
# define SDRAM_MCRVALUE1 0x80808130 /* run upmb cs4 loop 1 addr 0x30 REFRESH */
# define SDRAM_MPTRVALUE 0x400
#define SDRAM_MARVALUE 0x88
#else
# define SDRAM_MxMR_PTx 128
# define UPM_MRS_ADDR 0x5
# define UPM_REFRESH_ADDR 0x30
#endif /* !SDRAM_ALT_INIT_SEQUENCE */
static const uint sdram_table[] =
{
/* single read. (offset 0 in upm RAM) */
0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00,
0x1ff77c47,
/* precharge + MRS. (offset 5 in upm RAM) */
0x1ff77c34, 0xefeabc34, 0x1fb57c35,
/* burst read. (offset 8 in upm RAM) */
0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00,
0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* single write. (offset 18 in upm RAM) */
0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* burst write. (offset 20 in upm RAM) */
0x1f07fc04, 0xeeaebc00, 0x10ad7c00, 0xf0affc00,
0xf0affc00, 0xe1bbbc04, 0x1ff77c47, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* refresh. (offset 30 in upm RAM) */
0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04,
0xfffffc84, 0xfffffc07, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* exception. (offset 3c in upm RAM) */
0x7ffffc07, _NOT_USED_, _NOT_USED_, _NOT_USED_ };
/* ------------------------------------------------------------------------- */
#else
#error SDRAM not correctly configured
#endif
/* ------------------------------------------------------------------------- */
/*
* Memory Periodic Timer Prescaler
*/
#define SDRAM_OR4VALUE 0x00000a00 /* SAM,GL5A/S=01,addr mask or'ed on later */
#define SDRAM_BR4VALUE 0x000000c1 /* UPMB,base addr or'ed on later */
/* ------------------------------------------------------------------------- */
#ifdef SDRAM_ALT_INIT_SEQENCE
/* ------------------------------------------------------------------------- */
static int _initsdram(uint base, uint noMbytes)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
upmconfig(UPMB, (uint *)sdram_table,sizeof(sdram_table)/sizeof(uint));
memctl->memc_mptpr = SDRAM_MPTPRVALUE;
/* Configure the refresh (mostly). This needs to be
* based upon processor clock speed and optimized to provide
* the highest level of performance. For multiple banks,
* this time has to be divided by the number of banks.
* Although it is not clear anywhere, it appears the
* refresh steps through the chip selects for this UPM
* on each refresh cycle.
* We have to be careful changing
* UPM registers after we ask it to run these commands.
*/
memctl->memc_mbmr = SDRAM_MBMRVALUE0; /* TLF 4 */
memctl->memc_mar = SDRAM_MARVALUE; /* MRS code */
udelay(200);
/* Now run the precharge/nop/mrs commands.
*/
memctl->memc_mcr = 0x80808111; /* run umpb cs4 1 count 1, addr 0x11 ??? (50Mhz) */
/* run umpb cs4 1 count 1, addr 0x11 precharge+MRS (100Mhz) */
udelay(200);
/* Run 8 refresh cycles */
memctl->memc_mcr = SDRAM_MCRVALUE0; /* run upmb cs4 loop 1 addr 0x5 precharge+MRS (50 Mhz)*/
/* run upmb cs4 loop 1 addr 0x11 precharge+MRS (100MHz) */
udelay(200);
memctl->memc_mbmr = SDRAM_MBMRVALUE1; /* TLF 4 (100 Mhz) or TLF 8 (50MHz) */
memctl->memc_mcr = SDRAM_MCRVALUE1; /* run upmb cs4 loop 1 addr 0x30 refr (50 Mhz) */
/* run upmb cs4 loop 1 addr 0x11 precharge+MRS ??? (100MHz) */
udelay(200);
memctl->memc_mbmr = SDRAM_MBMRVALUE0; /* TLF 4 */
memctl->memc_or4 = SDRAM_OR4VALUE | ~((noMbytes<<20)-1);
memctl->memc_br4 = SDRAM_BR4VALUE | base;
return 0;
}
/* ------------------------------------------------------------------------- */
#else /* !SDRAM_ALT_INIT_SEQUENCE */
/* ------------------------------------------------------------------------- */
/* refresh rate 15.6 us (= 64 ms / 4K = 62.4 / quad bursts) for <= 128 MBit */
# define MPTPR_2BK_4K MPTPR_PTP_DIV16 /* setting for 2 banks */
# define MPTPR_1BK_4K MPTPR_PTP_DIV32 /* setting for 1 bank */
/* refresh rate 7.8 us (= 64 ms / 8K = 31.2 / quad bursts) for 256 MBit */
# define MPTPR_2BK_8K MPTPR_PTP_DIV8 /* setting for 2 banks */
# define MPTPR_1BK_8K MPTPR_PTP_DIV16 /* setting for 1 bank */
/*
* MxMR settings for SDRAM
*/
/* 8 column SDRAM */
# define SDRAM_MxMR_8COL ((SDRAM_MxMR_PTx << MBMR_PTB_SHIFT) | MBMR_PTBE | \
MBMR_AMB_TYPE_0 | MBMR_DSB_1_CYCL | MBMR_G0CLB_A11 | \
MBMR_RLFB_1X | MBMR_WLFB_1X | MBMR_TLFB_4X)
/* 9 column SDRAM */
# define SDRAM_MxMR_9COL ((SDRAM_MxMR_PTx << MBMR_PTB_SHIFT) | MBMR_PTAE | \
MBMR_AMB_TYPE_1 | MBMR_DSB_1_CYCL | MBMR_G0CLB_A10 | \
MBMR_RLFB_1X | MBMR_WLFB_1X | MBMR_TLFB_4X)
static int _initsdram(uint base, uint noMbytes)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
upmconfig(UPMB, (uint *)sdram_table,sizeof(sdram_table)/sizeof(uint));
memctl->memc_mptpr = MPTPR_2BK_4K;
memctl->memc_mbmr = SDRAM_MxMR_8COL & (~(MBMR_PTBE)); /* no refresh yet */
/* map CS 4 */
memctl->memc_or4 = SDRAM_OR4VALUE | ~((noMbytes<<20)-1);
memctl->memc_br4 = SDRAM_BR4VALUE | base;
/* Perform SDRAM initilization */
# ifdef UPM_NOP_ADDR /* not currently in UPM table */
/* step 1: nop */
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_B | MCR_OP_RUN | MCR_MB_CS4 |
MCR_MLCF(0) | UPM_NOP_ADDR;
# endif
/* step 2: delay */
udelay(200);
# ifdef UPM_PRECHARGE_ADDR /* merged with MRS in UPM table */
/* step 3: precharge */
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_B | MCR_OP_RUN | MCR_MB_CS4 |
MCR_MLCF(4) | UPM_PRECHARGE_ADDR;
# endif
/* step 4: refresh */
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_B | MCR_OP_RUN | MCR_MB_CS4 |
MCR_MLCF(2) | UPM_REFRESH_ADDR;
/*
* note: for some reason, the UPM values we are using include
* precharge with MRS
*/
/* step 5: mrs */
memctl->memc_mar = 0x00000088;
memctl->memc_mcr = MCR_UPM_B | MCR_OP_RUN | MCR_MB_CS4 |
MCR_MLCF(1) | UPM_MRS_ADDR;
# ifdef UPM_NOP_ADDR
memctl->memc_mar = 0x00000000;
memctl->memc_mcr = MCR_UPM_B | MCR_OP_RUN | MCR_MB_CS4 |
MCR_MLCF(0) | UPM_NOP_ADDR;
# endif
/*
* Enable refresh
*/
memctl->memc_mbmr |= MBMR_PTBE;
return 0;
}
#endif /* !SDRAM_ALT_INIT_SEQUENCE */
/* ------------------------------------------------------------------------- */
static void _sdramdisable(void)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
memctl->memc_br4 = 0x00000000;
/* maybe we should turn off upmb here or something */
}
/* ------------------------------------------------------------------------- */
static int initsdram(uint base, uint *noMbytes)
{
uint m = CFG_SDRAM_SIZE>>20;
/* _initsdram needs access to sdram */
*((uint *)BCSR1) |= BCSR1_SDRAM_EN; /* enable sdram */
if(!_initsdram(base, m))
{
*noMbytes += m;
return 0;
}
else
{
*((uint *)BCSR1) &= ~BCSR1_SDRAM_EN; /* disable sdram */
_sdramdisable();
return -1;
}
}
#endif /* CONFIG_FADS */
/* ========================================================================= */
long int initdram (int board_type)
{
uint sdramsz = 0; /* size of sdram in Mbytes */
uint base = 0; /* base of dram in bytes */
uint m = 0; /* size of dram in Mbytes */
#ifndef CONFIG_MPC885ADS
uint k, s;
#endif
#ifdef CONFIG_FADS
if (!initsdram (0x00000000, &sdramsz)) {
base = sdramsz << 20;
printf ("(%u MB SDRAM) ", sdramsz);
}
#endif
#ifndef CONFIG_MPC885ADS /* No old DRAM on MPC885ADS */
k = (*((uint *) BCSR2) >> 23) & 0x0f;
switch (k & 0x3) {
/* "MCM36100 / MT8D132X" */
case 0x00:
m = 4;
break;
/* "MCM36800 / MT16D832X" */
case 0x01:
m = 32;
break;
/* "MCM36400 / MT8D432X" */
case 0x02:
m = 16;
break;
/* "MCM36200 / MT16D832X ?" */
case 0x03:
m = 8;
break;
}
switch (k >> 2) {
case 0x02:
k = 70;
break;
case 0x03:
k = 60;
break;
default:
printf ("unknown dramdelay (0x%x) - defaulting to 70 ns", k);
k = 70;
}
#ifdef CONFIG_FADS
/* the FADS is missing this bit, all rams treated as non-edo */
s = 0;
#else
s = (*((uint *) BCSR2) >> 27) & 0x01;
#endif
if (!_draminit (base, m, s, k)) {
printf ("%dM %dns %sDRAM: ", m, k, s ? "EDO " : "");
} else {
_dramdisable ();
m = 0;
}
#endif /* !CONFIG_MPC885ADS */
m += sdramsz; /* add sdram size to total */
return (m << 20);
}
/* ------------------------------------------------------------------------- */
int testdram (void)
{
/* TODO: XXX XXX XXX */
printf ("test: 16 MB - ok\n");
return (0);
}
/* ========================================================================= */
/*
* Check Board Identity:
*/
#if defined(CONFIG_FADS) && defined(CFG_DAUGHTERBOARD)
static void checkdboard(void)
{
/* get db type from BCSR 3 */
uint k = (*((uint *)BCSR3) >> 24) & 0x3f;
puts (" with db ");
switch(k) {
case 0x03 :
puts ("MPC823");
break;
case 0x20 :
puts ("MPC801");
break;
case 0x21 :
puts ("MPC850");
break;
case 0x22 :
puts ("MPC821, MPC860 / MPC860SAR / MPC860T");
break;
case 0x23 :
puts ("MPC860SAR");
break;
case 0x24 :
case 0x2A :
puts ("MPC860T");
break;
case 0x3F :
puts ("MPC850SAR");
break;
default : printf("0x%x", k);
}
}
#endif /* defined(CONFIG_FADS) && defined(CFG_DAUGHTERBOARD) */
int checkboard (void)
{
/* get revision from BCSR 3 */
uint r = (((*((uint *) BCSR3) >> 23) & 1) << 3)
| (((*((uint *) BCSR3) >> 19) & 1) << 2)
| (((*((uint *) BCSR3) >> 16) & 3));
puts ("Board: ");
#if defined(CONFIG_MPC86xADS)
puts ("MPC86xADS");
#elif defined(CONFIG_MPC885ADS)
puts ("MPC885ADS");
r = 0; /* I've got NR (No Revision) board */
#elif defined(CONFIG_FADS)
puts ("FADS");
checkdboard ();
#else
puts ("ADS");
#endif
puts (" rev ");
switch (r) {
#if defined(CONFIG_ADS)
case 0x00:
puts ("ENG - this board sucks, check the errata, not supported\n");
return -1;
case 0x01:
puts ("PILOT - warning, read errata \n");
break;
case 0x02:
puts ("A - warning, read errata \n");
break;
case 0x03:
puts ("B \n");
break;
#elif defined(CONFIG_MPC885ADS)
case 0x00:
puts ("NR\n");
break;
#else /* FADS and newer */
case 0x00:
puts ("ENG\n");
break;
case 0x01:
puts ("PILOT\n");
break;
#endif /* CONFIG_ADS */
default:
printf ("unknown (0x%x)\n", r);
return -1;
}
return 0;
}
/* ========================================================================= */
#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
#ifdef CFG_PCMCIA_MEM_ADDR
volatile unsigned char *pcmcia_mem = (unsigned char*)CFG_PCMCIA_MEM_ADDR;
#endif
int pcmcia_init(void)
{
volatile pcmconf8xx_t *pcmp;
uint v, slota = 0, slotb = 0;
/*
** Enable the PCMCIA for a Flash card.
*/
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
#if 0
pcmp->pcmc_pbr0 = CFG_PCMCIA_MEM_ADDR;
pcmp->pcmc_por0 = 0xc00ff05d;
#endif
/* Set all slots to zero by default. */
pcmp->pcmc_pgcra = 0;
pcmp->pcmc_pgcrb = 0;
#ifdef CONFIG_PCMCIA_SLOT_A
pcmp->pcmc_pgcra = 0x40;
#endif
#ifdef CONFIG_PCMCIA_SLOT_B
pcmp->pcmc_pgcrb = 0x40;
#endif
/* enable PCMCIA buffers */
*((uint *)BCSR1) &= ~BCSR1_PCCEN;
/* Check if any PCMCIA card is plugged in. */
#ifdef CONFIG_PCMCIA_SLOT_A
slota = (pcmp->pcmc_pipr & 0x18000000) == 0 ;
#endif
#ifdef CONFIG_PCMCIA_SLOT_B
slotb = (pcmp->pcmc_pipr & 0x00001800) == 0 ;
#endif
if (!(slota || slotb)) {
printf("No card present\n");
pcmp->pcmc_pgcra = 0;
pcmp->pcmc_pgcrb = 0;
return -1;
}
else
printf("Card present (");
v = 0;
/* both the ADS and the FADS have a 5V keyed pcmcia connector (?)
**
** Paolo - Yes, but i have to insert some 3.3V card in that slot on
** my FADS... :-)
*/
#if defined(CONFIG_MPC86x)
switch ((pcmp->pcmc_pipr >> 30) & 3)
#elif defined(CONFIG_MPC823) || defined(CONFIG_MPC850)
switch ((pcmp->pcmc_pipr >> 14) & 3)
#endif
{
case 0x00 :
printf("5V");
v = 5;
break;
case 0x01 :
printf("5V and 3V");
#ifdef CONFIG_FADS
v = 3; /* User lower voltage if supported! */
#else
v = 5;
#endif
break;
case 0x03 :
printf("5V, 3V and x.xV");
#ifdef CONFIG_FADS
v = 3; /* User lower voltage if supported! */
#else
v = 5;
#endif
break;
}
switch (v) {
#ifdef CONFIG_FADS
case 3:
printf("; using 3V");
/*
** Enable 3 volt Vcc.
*/
*((uint *)BCSR1) &= ~BCSR1_PCCVCC1;
*((uint *)BCSR1) |= BCSR1_PCCVCC0;
break;
#endif
case 5:
printf("; using 5V");
#ifdef CONFIG_ADS
/*
** Enable 5 volt Vcc.
*/
*((uint *)BCSR1) &= ~BCSR1_PCCVCCON;
#endif
#ifdef CONFIG_FADS
/*
** Enable 5 volt Vcc.
*/
*((uint *)BCSR1) &= ~BCSR1_PCCVCC0;
*((uint *)BCSR1) |= BCSR1_PCCVCC1;
#endif
break;
default:
*((uint *)BCSR1) |= BCSR1_PCCEN; /* disable pcmcia */
printf("; unknown voltage");
return -1;
}
printf(")\n");
/* disable pcmcia reset after a while */
udelay(20);
#ifdef CONFIG_PCMCIA_SLOT_A
pcmp->pcmc_pgcra = 0;
#endif
#ifdef CONFIG_PCMCIA_SLOT_B
pcmp->pcmc_pgcrb = 0;
#endif
/* If you using a real hd you should give a short
* spin-up time. */
#ifdef CONFIG_DISK_SPINUP_TIME
udelay(CONFIG_DISK_SPINUP_TIME);
#endif
return 0;
}
#endif /* CFG_CMD_PCMCIA */
/* ========================================================================= */
#ifdef CFG_PC_IDE_RESET
void ide_set_reset(int on)
{
volatile immap_t *immr = (immap_t *)CFG_IMMR;
/*
* Configure PC for IDE Reset Pin
*/
if (on) { /* assert RESET */
immr->im_ioport.iop_pcdat &= ~(CFG_PC_IDE_RESET);
} else { /* release RESET */
immr->im_ioport.iop_pcdat |= CFG_PC_IDE_RESET;
}
/* program port pin as GPIO output */
immr->im_ioport.iop_pcpar &= ~(CFG_PC_IDE_RESET);
immr->im_ioport.iop_pcso &= ~(CFG_PC_IDE_RESET);
immr->im_ioport.iop_pcdir |= CFG_PC_IDE_RESET;
}
#endif /* CFG_PC_IDE_RESET */
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