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uboot-1.1.4-kirkwood/board/gth/gth.c
Olaf Rempel f69754bccc u-boot 1.1.4
2024-01-07 23:57:24 +01:00

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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Adapted from FADS and other board config files to GTH by thomas@corelatus.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 <common.h>
#include <config.h>
#include <watchdog.h>
#include <mpc8xx.h>
#include "ee_access.h"
#include "ee_dev.h"
#ifdef CONFIG_BDM
#undef printf
#define printf(a,...) /* nothing */
#endif
int checkboard (void)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
int Id = 0;
int Rev = 0;
u32 Pbdat;
puts ("Board: ");
/* Turn on leds and setup for reading rev and id */
#define PB_OUTS (PB_BLUE_LED|PB_ID_GND)
#define PB_INS (PB_ID_0|PB_ID_1|PB_ID_2|PB_ID_3|PB_REV_1|PB_REV_0)
immap->im_cpm.cp_pbpar &= ~(PB_OUTS | PB_INS);
immap->im_cpm.cp_pbdir &= ~PB_INS;
immap->im_cpm.cp_pbdir |= PB_OUTS;
immap->im_cpm.cp_pbodr |= PB_OUTS;
immap->im_cpm.cp_pbdat &= ~PB_OUTS;
/* Hold 100 Mbit in reset until fpga is loaded */
immap->im_ioport.iop_pcpar &= ~PC_ENET100_RESET;
immap->im_ioport.iop_pcdir |= PC_ENET100_RESET;
immap->im_ioport.iop_pcso &= ~PC_ENET100_RESET;
immap->im_ioport.iop_pcdat &= ~PC_ENET100_RESET;
/* Turn on front led to show that we are alive */
immap->im_ioport.iop_papar &= ~PA_FRONT_LED;
immap->im_ioport.iop_padir |= PA_FRONT_LED;
immap->im_ioport.iop_paodr |= PA_FRONT_LED;
immap->im_ioport.iop_padat &= ~PA_FRONT_LED;
Pbdat = immap->im_cpm.cp_pbdat;
if (!(Pbdat & PB_ID_0))
Id += 1;
if (!(Pbdat & PB_ID_1))
Id += 2;
if (!(Pbdat & PB_ID_2))
Id += 4;
if (!(Pbdat & PB_ID_3))
Id += 8;
if (Pbdat & PB_REV_0)
Rev += 1;
if (Pbdat & PB_REV_1)
Rev += 2;
/* Turn ID off since we dont need it anymore */
immap->im_cpm.cp_pbdat |= PB_ID_GND;
printf ("GTH board, rev %d, id=0x%01x\n", Rev, Id);
return 0;
}
#define _NOT_USED_ 0xffffffff
const uint sdram_table[] = {
/* Single read, offset 0 */
0x0f3dfc04, 0x0eefbc04, 0x01bf7c04, 0x0feafc00,
0x1fb5fc45, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* Burst read, Offset 0x8, 4 reads */
0x0f3dfc04, 0x0eefbc04, 0x00bf7c04, 0x00ffec00,
0x00fffc00, 0x01eafc00, 0x1fb5fc00, 0xfffffc45,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* Not used part of burst read is used for MRS, Offset 0x14 */
0xefeabc34, 0x1fb57c34, 0xfffffc05, _NOT_USED_,
/* _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, */
/* Single write, Offset 0x18 */
0x0f3dfc04, 0x0eebbc00, 0x01a27c04, 0x1fb5fc45,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* Burst write, Offset 0x20. 4 writes */
0x0f3dfc04, 0x0eebbc00, 0x00b77c00, 0x00fffc00,
0x00fffc00, 0x01eafc04, 0x1fb5fc45, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* Not used part of burst write is used for precharge, Offset 0x2C */
0x0ff5fc04, 0xfffffc05, _NOT_USED_, _NOT_USED_,
/* _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, */
/* Period timer service. Offset 0x30. Refresh. Wait at least 70 ns after refresh command */
0x1ffd7c04, 0xfffffc04, 0xfffffc04, 0xfffffc05,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* Exception, Offset 0x3C */
0xfffffc04, 0xfffffc05, _NOT_USED_, _NOT_USED_
};
const uint fpga_table[] = {
/* Single read, offset 0 */
0x0cffec04, 0x00ffec04, 0x00ffec04, 0x00ffec04,
0x00fffc04, 0x00fffc00, 0x00ffec04, 0xffffec05,
/* Burst read, Offset 0x8 */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _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 0x18 */
0x0cffec04, 0x00ffec04, 0x00ffec04, 0x00ffec04,
0x00fffc04, 0x00fffc00, 0x00ffec04, 0xffffec05,
/* Burst write, Offset 0x20. */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* Period timer service. Offset 0x30. */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/* Exception, Offset 0x3C */
0xfffffc04, 0xfffffc05, _NOT_USED_, _NOT_USED_
};
int _initsdram (uint base, uint * noMbytes)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *mc = &immap->im_memctl;
volatile u32 *memptr;
mc->memc_mptpr = MPTPR_PTP_DIV16; /* (16-17) */
/* SDRAM in UPMA
GPL_0 is connected instead of A19 to SDRAM.
According to table 16-17, AMx should be 001, i.e. type 1
and GPL_0 should hold address A10 when multiplexing */
mc->memc_mamr = (0x2E << MAMR_PTA_SHIFT) | MAMR_PTAE | MAMR_AMA_TYPE_1 | MAMR_G0CLA_A10 | MAMR_RLFA_1X | MAMR_WLFA_1X | MAMR_TLFA_1X; /* (16-13) */
upmconfig (UPMA, (uint *) sdram_table,
sizeof (sdram_table) / sizeof (uint));
/* Perform init of sdram ( Datasheet Page 9 )
Precharge */
mc->memc_mcr = 0x8000212C; /* run upm a at 0x2C (16-15) */
/* Run 2 refresh cycles */
mc->memc_mcr = 0x80002130; /* run upm a at 0x30 (16-15) */
mc->memc_mcr = 0x80002130; /* run upm a at 0x30 (16-15) */
/* Set Mode register */
mc->memc_mar = 0x00000088; /* set mode register (address) to 0x022 (16-17) */
/* Lower 2 bits are not connected to chip */
mc->memc_mcr = 0x80002114; /* run upm a at 0x14 (16-15) */
/* CS1, base 0x0000000 - 64 Mbyte, use UPM A */
mc->memc_or1 = 0xfc000000 | OR_CSNT_SAM;
mc->memc_br1 = BR_MS_UPMA | BR_V; /* SDRAM base always 0 */
/* Test if we really have 64 MB SDRAM */
memptr = (u32 *) 0;
*memptr = 0;
memptr = (u32 *) 0x2000000; /* First u32 in upper 32 MB */
*memptr = 0x12345678;
memptr = (u32 *) 0;
if (*memptr == 0x12345678) {
/* Wrapped, only have 32 MB */
mc->memc_or1 = 0xfe000000 | OR_CSNT_SAM;
*noMbytes = 32;
} else {
/* 64 MB */
*noMbytes = 64;
}
/* Setup FPGA in UPMB */
upmconfig (UPMB, (uint *) fpga_table,
sizeof (fpga_table) / sizeof (uint));
/* Enable UPWAITB */
mc->memc_mbmr = MBMR_GPL_B4DIS; /* (16-13) */
/* CS2, base FPGA_2_BASE - 4 MByte, use UPM B 32 Bit */
mc->memc_or2 = 0xffc00000 | OR_BI;
mc->memc_br2 = FPGA_2_BASE | BR_MS_UPMB | BR_V;
/* CS3, base FPGA_3_BASE - 4 MByte, use UPM B 16 bit */
mc->memc_or3 = 0xffc00000 | OR_BI;
mc->memc_br3 = FPGA_3_BASE | BR_MS_UPMB | BR_V | BR_PS_16;
return 0;
}
/* ------------------------------------------------------------------------- */
void _sdramdisable (void)
{
volatile immap_t *immap = (immap_t *) CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
memctl->memc_br1 = 0x00000000;
/* maybe we should turn off upmb here or something */
}
/* ------------------------------------------------------------------------- */
int initsdram (uint base, uint * noMbytes)
{
*noMbytes = 32;
#ifdef CONFIG_START_IN_RAM
/* SDRAM is already setup. Dont touch it */
return 0;
#else
if (!_initsdram (base, noMbytes)) {
return 0;
} else {
_sdramdisable ();
return -1;
}
#endif
}
long int initdram (int board_type)
{
u32 *i;
u32 j;
u32 k;
/* GTH only have SDRAM */
uint sdramsz;
if (!initsdram (0x00000000, &sdramsz)) {
printf ("(%u MB SDRAM) ", sdramsz);
} else {
/********************************
*SDRAM ERROR, HALT PROCESSOR
*********************************/
printf ("SDRAM ERROR\n");
while (1);
}
#ifndef CONFIG_START_IN_RAM
#define U32_S ((sdramsz<<18)-1)
#if 1
/* Do a simple memory test */
for (i = (u32 *) 0, j = 0; (u32) i < U32_S; i += 2, j += 2) {
*i = j + (j << 17);
*(i + 1) = ~(j + (j << 18));
}
WATCHDOG_RESET ();
printf (".");
for (i = (u32 *) 0, j = 0; (u32) i < U32_S; i += 2, j += 2) {
k = *i;
if (k != (j + (j << 17))) {
printf ("Mem test error, i=0x%x, 0x%x\n, 0x%x", (u32) i, j, k);
while (1);
}
k = *(i + 1);
if (k != ~(j + (j << 18))) {
printf ("Mem test error(+1), i=0x%x, 0x%x\n, 0x%x",
(u32) i + 1, j, k);
while (1);
}
}
#endif
WATCHDOG_RESET ();
/* Clear memory */
for (i = (u32 *) 0; (u32) i < U32_S; i++) {
*i = 0;
}
#endif /* !start in ram */
WATCHDOG_RESET ();
return (sdramsz << 20);
}
#define POWER_OFFSET 0xF0000
#define SW_WATCHDOG_REASON 13
#define BOOTDATA_OFFSET 0xF8000
#define MAX_ATTEMPTS 5
#define FAILSAFE_BOOT 1
#define SYSTEM_BOOT 2
#define WRITE_FLASH16(a, d) \
do \
{ \
*((volatile u16 *) (a)) = (d);\
} while(0)
static void write_bootdata (volatile u16 * addr, u8 System, u8 Count)
{
u16 data;
volatile u16 *flash = (u16 *) (CFG_FLASH_BASE);
if ((System != FAILSAFE_BOOT) & (System != SYSTEM_BOOT)) {
printf ("Invalid system data %u, setting failsafe\n", System);
System = FAILSAFE_BOOT;
}
if ((Count < 1) | (Count > MAX_ATTEMPTS)) {
printf ("Invalid boot count %u, setting 1\n", Count);
Count = 1;
}
if (System == FAILSAFE_BOOT) {
printf ("Setting failsafe boot in flash\n");
} else {
printf ("Setting system boot in flash\n");
}
printf ("Boot attempt %d\n", Count);
data = (System << 8) | Count;
/* AMD 16 bit */
WRITE_FLASH16 (&flash[0x555], 0xAAAA);
WRITE_FLASH16 (&flash[0x2AA], 0x5555);
WRITE_FLASH16 (&flash[0x555], 0xA0A0);
WRITE_FLASH16 (addr, data);
}
static void maybe_update_restart_reason (volatile u32 * addr32)
{
/* Update addr if sw wd restart */
volatile u16 *flash = (u16 *) (CFG_FLASH_BASE);
volatile u16 *addr_16 = (u16 *) addr32;
u32 rsr;
/* Dont reset register now */
rsr = ((volatile immap_t *) CFG_IMMR)->im_clkrst.car_rsr;
rsr >>= 24;
if (rsr & 0x10) {
/* Was really a sw wd restart, update reason */
printf ("Last restart by software watchdog\n");
/* AMD 16 bit */
WRITE_FLASH16 (&flash[0x555], 0xAAAA);
WRITE_FLASH16 (&flash[0x2AA], 0x5555);
WRITE_FLASH16 (&flash[0x555], 0xA0A0);
WRITE_FLASH16 (addr_16, 0);
udelay (1000);
WATCHDOG_RESET ();
/* AMD 16 bit */
WRITE_FLASH16 (&flash[0x555], 0xAAAA);
WRITE_FLASH16 (&flash[0x2AA], 0x5555);
WRITE_FLASH16 (&flash[0x555], 0xA0A0);
WRITE_FLASH16 (addr_16 + 1, SW_WATCHDOG_REASON);
}
}
static void check_restart_reason (void)
{
/* Update restart reason if sw watchdog was
triggered */
int i;
volatile u32 *raddr;
raddr = (u32 *) (CFG_FLASH_BASE + POWER_OFFSET);
if (*raddr == 0xFFFFFFFF) {
/* Nothing written */
maybe_update_restart_reason (raddr);
} else {
/* Search for latest written reason */
i = 0;
while ((*(raddr + 2) != 0xFFFFFFFF) & (i < 2000)) {
raddr += 2;
i++;
}
if (i >= 2000) {
/* Whoa, dont write any more */
printf ("*** No free restart reason found ***\n");
} else {
/* Check if written */
if (*raddr == 0) {
/* Erased by kernel, no new reason written */
maybe_update_restart_reason (raddr + 2);
}
}
}
}
static void check_boot_tries (void)
{
/* Count the number of boot attemps
switch system if too many */
int i;
volatile u16 *addr;
volatile u16 data;
int failsafe = 1;
u8 system;
u8 count;
addr = (u16 *) (CFG_FLASH_BASE + BOOTDATA_OFFSET);
if (*addr == 0xFFFF) {
printf ("*** No bootdata exists. ***\n");
write_bootdata (addr, FAILSAFE_BOOT, 1);
} else {
/* Search for latest written bootdata */
i = 0;
while ((*(addr + 1) != 0xFFFF) & (i < 8000)) {
addr++;
i++;
}
if (i >= 8000) {
/* Whoa, dont write any more */
printf ("*** No bootdata found. Not updating flash***\n");
} else {
/* See how many times we have tried to boot real system */
data = *addr;
system = data >> 8;
count = data & 0xFF;
if ((system != SYSTEM_BOOT) & (system != FAILSAFE_BOOT)) {
printf ("*** Wrong system %d\n", system);
system = FAILSAFE_BOOT;
count = 1;
} else {
switch (count) {
case 0:
case 1:
case 2:
case 3:
case 4:
/* Try same system again if needed */
count++;
break;
case 5:
/* Switch system and reset tries */
count = 1;
system = 3 - system;
printf ("***Too many boot attempts, switching system***\n");
break;
default:
/* Switch system, start over and hope it works */
printf ("***Unexpected data on addr 0x%x, %u***\n",
(u32) addr, data);
count = 1;
system = 3 - system;
}
}
write_bootdata (addr + 1, system, count);
if (system == SYSTEM_BOOT) {
failsafe = 0;
}
}
}
if (failsafe) {
printf ("Booting failsafe system\n");
setenv ("bootargs", "panic=1 root=/dev/hda7");
setenv ("bootcmd", "disk 100000 0:5;bootm 100000");
} else {
printf ("Using normal system\n");
setenv ("bootargs", "panic=1 root=/dev/hda4");
setenv ("bootcmd", "disk 100000 0:2;bootm 100000");
}
}
int misc_init_r (void)
{
u8 Rx[80];
u8 Tx[5];
int page;
int read = 0;
volatile immap_t *immap = (immap_t *) CFG_IMMR;
/* Kill fpga */
immap->im_ioport.iop_papar &= ~(PA_FL_CONFIG | PA_FL_CE);
immap->im_ioport.iop_padir |= (PA_FL_CONFIG | PA_FL_CE);
immap->im_ioport.iop_paodr &= ~(PA_FL_CONFIG | PA_FL_CE);
/* Enable fpga, active low */
immap->im_ioport.iop_padat &= ~PA_FL_CE;
/* Start configuration */
immap->im_ioport.iop_padat &= ~PA_FL_CONFIG;
udelay (2);
immap->im_ioport.iop_padat |= (PA_FL_CONFIG | PA_FL_CE);
/* Check if we need to boot failsafe system */
check_boot_tries ();
/* Check if we need to update restart reason */
check_restart_reason ();
if (ee_init_data ()) {
printf ("EEPROM init failed\n");
return (0);
}
/* Read the pages where ethernet address is stored */
for (page = EE_USER_PAGE_0; page <= EE_USER_PAGE_0 + 2; page++) {
/* Copy from nvram to scratchpad */
Tx[0] = RECALL_MEMORY;
Tx[1] = page;
if (ee_do_command (Tx, 2, NULL, 0, TRUE)) {
printf ("EE user page %d recall failed\n", page);
return (0);
}
Tx[0] = READ_SCRATCHPAD;
if (ee_do_command (Tx, 2, Rx + read, 9, TRUE)) {
printf ("EE user page %d read failed\n", page);
return (0);
}
/* Crc in 9:th byte */
if (!ee_crc_ok (Rx + read, 8, *(Rx + read + 8))) {
printf ("EE read failed, page %d. CRC error\n", page);
return (0);
}
read += 8;
}
/* Add eos after eth addr */
Rx[17] = 0;
printf ("Ethernet addr read from eeprom: %s\n\n", Rx);
if ((Rx[2] != ':') |
(Rx[5] != ':') |
(Rx[8] != ':') | (Rx[11] != ':') | (Rx[14] != ':')) {
printf ("*** ethernet addr invalid, using default ***\n");
} else {
setenv ("ethaddr", (char *)Rx);
}
return (0);
}
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