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u-boot/board/mpl/mip405/mip405.c
Wolfgang Denk cdb749778a Rename getenv_r() into getenv_f() 
While running from flash, i. e. before relocation, we have only a
limited C runtime environment without writable data segment. In this
phase, some configurations (for example with environment in EEPROM)
must not use the normal getenv(), but a special function.  This
function had been called getenv_r(), with the idea that the "_r"
suffix would mean the same as in the _r_eentrant versions of some of
the C library functions (for example getdate vs. getdate_r, getgrent
vs. getgrent_r, etc.).

Unfortunately this was a misleading name, as in U-Boot the "_r"
generally means "running from RAM", i. e. _after_ relocation.

To avoid confusion, rename into getenv_f() [as "running from flash"]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
2010-08-04 00:45:36 +02:00

804 lines
22 KiB
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/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
*
* 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
*
*
* TODO: clean-up
*/
/*
* How do I program the SDRAM Timing Register (SDRAM0_TR) for a specific SDRAM or DIMM?
*
* As an example, consider a case where PC133 memory with CAS Latency equal to 2 is being
* used with a 200MHz 405GP. For a typical 128Mb, PC133 SDRAM, the relevant minimum
* parameters from the datasheet are:
* Tclk = 7.5ns (CL = 2)
* Trp = 15ns
* Trc = 60ns
* Trcd = 15ns
* Trfc = 66ns
*
* If we are operating the 405GP with the MemClk output frequency set to 100 MHZ, the clock
* period is 10ns and the parameters needed for the Timing Register are:
* CASL = CL = 2 clock cycles
* PTA = Trp = 15ns / 10ns = 2 clock cycles
* CTP = Trc - Trcd - Trp = (60ns - 15ns - 15ns) / 10ns= 3 clock cycles
* LDF = 2 clock cycles (but can be extended to meet board-level timing)
* RFTA = Trfc = 66ns / 10ns= 7 clock cycles
* RCD = Trcd = 15ns / 10ns= 2 clock cycles
*
* The actual bit settings in the register would be:
*
* CASL = 0b01
* PTA = 0b01
* CTP = 0b10
* LDF = 0b01
* RFTA = 0b011
* RCD = 0b01
*
* If Trfc is not specified in the datasheet for PC100 or PC133 memory, set RFTA = Trc
* instead. Figure 24 in the PC SDRAM Specification Rev. 1.7 shows refresh to active delay
* defined as Trc rather than Trfc.
* When using DIMM modules, most but not all of the required timing parameters can be read
* from the Serial Presence Detect (SPD) EEPROM on the module. Specifically, Trc and Trfc
* are not available from the EEPROM
*/
#include <common.h>
#include "mip405.h"
#include <asm/processor.h>
#include <4xx_i2c.h>
#include <miiphy.h>
#include "../common/common_util.h"
#include <stdio_dev.h>
#include <i2c.h>
#include <rtc.h>
DECLARE_GLOBAL_DATA_PTR;
#undef SDRAM_DEBUG
#define ENABLE_ECC /* for ecc boards */
#define FALSE 0
#define TRUE 1
/* stdlib.h causes some compatibility problems; should fixe these! -- wd */
#ifndef __ldiv_t_defined
typedef struct {
long int quot; /* Quotient */
long int rem; /* Remainder */
} ldiv_t;
extern ldiv_t ldiv (long int __numer, long int __denom);
# define __ldiv_t_defined 1
#endif
#define PLD_PART_REG PER_PLD_ADDR + 0
#define PLD_VERS_REG PER_PLD_ADDR + 1
#define PLD_BOARD_CFG_REG PER_PLD_ADDR + 2
#define PLD_IRQ_REG PER_PLD_ADDR + 3
#define PLD_COM_MODE_REG PER_PLD_ADDR + 4
#define PLD_EXT_CONF_REG PER_PLD_ADDR + 5
#define MEGA_BYTE (1024*1024)
typedef struct {
unsigned char boardtype; /* Board revision and Population Options */
unsigned char cal; /* cas Latency (will be programmend as cal-1) */
unsigned char trp; /* datain27 in clocks */
unsigned char trcd; /* datain29 in clocks */
unsigned char tras; /* datain30 in clocks */
unsigned char tctp; /* tras - trcd in clocks */
unsigned char am; /* Address Mod (will be programmed as am-1) */
unsigned char sz; /* log binary => Size = (4MByte<<sz) 5 = 128, 4 = 64, 3 = 32, 2 = 16, 1=8 */
unsigned char ecc; /* if true, ecc is enabled */
} sdram_t;
#if defined(CONFIG_MIP405T)
const sdram_t sdram_table[] = {
{ 0x0F, /* MIP405T Rev A, 64MByte -1 Board */
3, /* Case Latenty = 3 */
3, /* trp 20ns / 7.5 ns datain[27] */
3, /* trcd 20ns /7.5 ns (datain[29]) */
6, /* tras 44ns /7.5 ns (datain[30]) */
4, /* tcpt 44 - 20ns = 24ns */
2, /* Address Mode = 2 (12x9x4) */
3, /* size value (32MByte) */
0}, /* ECC disabled */
{ 0xff, /* terminator */
0xff,
0xff,
0xff,
0xff,
0xff,
0xff,
0xff }
};
#else
const sdram_t sdram_table[] = {
{ 0x0f, /* Rev A, 128MByte -1 Board */
3, /* Case Latenty = 3 */
3, /* trp 20ns / 7.5 ns datain[27] */
3, /* trcd 20ns /7.5 ns (datain[29]) */
6, /* tras 44ns /7.5 ns (datain[30]) */
4, /* tcpt 44 - 20ns = 24ns */
3, /* Address Mode = 3 */
5, /* size value */
1}, /* ECC enabled */
{ 0x07, /* Rev A, 64MByte -2 Board */
3, /* Case Latenty = 3 */
3, /* trp 20ns / 7.5 ns datain[27] */
3, /* trcd 20ns /7.5 ns (datain[29]) */
6, /* tras 44ns /7.5 ns (datain[30]) */
4, /* tcpt 44 - 20ns = 24ns */
2, /* Address Mode = 2 */
4, /* size value */
1}, /* ECC enabled */
{ 0x03, /* Rev A, 128MByte -4 Board */
3, /* Case Latenty = 3 */
3, /* trp 20ns / 7.5 ns datain[27] */
3, /* trcd 20ns /7.5 ns (datain[29]) */
6, /* tras 44ns /7.5 ns (datain[30]) */
4, /* tcpt 44 - 20ns = 24ns */
3, /* Address Mode = 3 */
5, /* size value */
1}, /* ECC enabled */
{ 0x1f, /* Rev B, 128MByte -3 Board */
3, /* Case Latenty = 3 */
3, /* trp 20ns / 7.5 ns datain[27] */
3, /* trcd 20ns /7.5 ns (datain[29]) */
6, /* tras 44ns /7.5 ns (datain[30]) */
4, /* tcpt 44 - 20ns = 24ns */
3, /* Address Mode = 3 */
5, /* size value */
1}, /* ECC enabled */
{ 0x2f, /* Rev C, 128MByte -3 Board */
3, /* Case Latenty = 3 */
3, /* trp 20ns / 7.5 ns datain[27] */
3, /* trcd 20ns /7.5 ns (datain[29]) */
6, /* tras 44ns /7.5 ns (datain[30]) */
4, /* tcpt 44 - 20ns = 24ns */
3, /* Address Mode = 3 */
5, /* size value */
1}, /* ECC enabled */
{ 0xff, /* terminator */
0xff,
0xff,
0xff,
0xff,
0xff,
0xff,
0xff }
};
#endif /*CONFIG_MIP405T */
void SDRAM_err (const char *s)
{
#ifndef SDRAM_DEBUG
(void) get_clocks ();
gd->baudrate = 9600;
serial_init ();
#endif
serial_puts ("\n");
serial_puts (s);
serial_puts ("\n enable SDRAM_DEBUG for more info\n");
for (;;);
}
unsigned char get_board_revcfg (void)
{
out8 (PER_BOARD_ADDR, 0);
return (in8 (PER_BOARD_ADDR));
}
#ifdef SDRAM_DEBUG
void write_hex (unsigned char i)
{
char cc;
cc = i >> 4;
cc &= 0xf;
if (cc > 9)
serial_putc (cc + 55);
else
serial_putc (cc + 48);
cc = i & 0xf;
if (cc > 9)
serial_putc (cc + 55);
else
serial_putc (cc + 48);
}
void write_4hex (unsigned long val)
{
write_hex ((unsigned char) (val >> 24));
write_hex ((unsigned char) (val >> 16));
write_hex ((unsigned char) (val >> 8));
write_hex ((unsigned char) val);
}
#endif
int init_sdram (void)
{
unsigned long tmp, baseaddr;
unsigned short i;
unsigned char trp_clocks,
trcd_clocks,
tras_clocks,
trc_clocks,
tctp_clocks;
unsigned char cal_val;
unsigned char bc;
unsigned long sdram_tim, sdram_bank;
/*i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);*/
(void) get_clocks ();
gd->baudrate = 9600;
serial_init ();
/* set up the pld */
mtdcr (EBC0_CFGADDR, PB7AP);
mtdcr (EBC0_CFGDATA, PLD_AP);
mtdcr (EBC0_CFGADDR, PB7CR);
mtdcr (EBC0_CFGDATA, PLD_CR);
/* THIS IS OBSOLETE */
/* set up the board rev reg*/
mtdcr (EBC0_CFGADDR, PB5AP);
mtdcr (EBC0_CFGDATA, BOARD_AP);
mtdcr (EBC0_CFGADDR, PB5CR);
mtdcr (EBC0_CFGDATA, BOARD_CR);
#ifdef SDRAM_DEBUG
/* get all informations from PLD */
serial_puts ("\nPLD Part 0x");
bc = in8 (PLD_PART_REG);
write_hex (bc);
serial_puts ("\nPLD Vers 0x");
bc = in8 (PLD_VERS_REG);
write_hex (bc);
serial_puts ("\nBoard Rev 0x");
bc = in8 (PLD_BOARD_CFG_REG);
write_hex (bc);
serial_puts ("\n");
#endif
/* check board */
bc = in8 (PLD_PART_REG);
#if defined(CONFIG_MIP405T)
if((bc & 0x80)==0)
SDRAM_err ("U-Boot configured for a MIP405T not for a MIP405!!!\n");
#else
if((bc & 0x80)==0x80)
SDRAM_err ("U-Boot configured for a MIP405 not for a MIP405T!!!\n");
#endif
/* set-up the chipselect machine */
mtdcr (EBC0_CFGADDR, PB0CR); /* get cs0 config reg */
tmp = mfdcr (EBC0_CFGDATA);
if ((tmp & 0x00002000) == 0) {
/* MPS Boot, set up the flash */
mtdcr (EBC0_CFGADDR, PB1AP);
mtdcr (EBC0_CFGDATA, FLASH_AP);
mtdcr (EBC0_CFGADDR, PB1CR);
mtdcr (EBC0_CFGDATA, FLASH_CR);
} else {
/* Flash boot, set up the MPS */
mtdcr (EBC0_CFGADDR, PB1AP);
mtdcr (EBC0_CFGDATA, MPS_AP);
mtdcr (EBC0_CFGADDR, PB1CR);
mtdcr (EBC0_CFGDATA, MPS_CR);
}
/* set up UART0 (CS2) and UART1 (CS3) */
mtdcr (EBC0_CFGADDR, PB2AP);
mtdcr (EBC0_CFGDATA, UART0_AP);
mtdcr (EBC0_CFGADDR, PB2CR);
mtdcr (EBC0_CFGDATA, UART0_CR);
mtdcr (EBC0_CFGADDR, PB3AP);
mtdcr (EBC0_CFGDATA, UART1_AP);
mtdcr (EBC0_CFGADDR, PB3CR);
mtdcr (EBC0_CFGDATA, UART1_CR);
bc = in8 (PLD_BOARD_CFG_REG);
#ifdef SDRAM_DEBUG
serial_puts ("\nstart SDRAM Setup\n");
serial_puts ("\nBoard Rev: ");
write_hex (bc);
serial_puts ("\n");
#endif
i = 0;
baseaddr = CONFIG_SYS_SDRAM_BASE;
while (sdram_table[i].sz != 0xff) {
if (sdram_table[i].boardtype == bc)
break;
i++;
}
if (sdram_table[i].boardtype != bc)
SDRAM_err ("No SDRAM table found for this board!!!\n");
#ifdef SDRAM_DEBUG
serial_puts (" found table ");
write_hex (i);
serial_puts (" \n");
#endif
/* since the ECC initialisation needs some time,
* we show that we're alive
*/
if (sdram_table[i].ecc)
serial_puts ("\nInitializing SDRAM, Please stand by");
cal_val = sdram_table[i].cal - 1; /* Cas Latency */
trp_clocks = sdram_table[i].trp; /* 20ns / 7.5 ns datain[27] */
trcd_clocks = sdram_table[i].trcd; /* 20ns /7.5 ns (datain[29]) */
tras_clocks = sdram_table[i].tras; /* 44ns /7.5 ns (datain[30]) */
/* ctp = ((trp + tras) - trp - trcd) => tras - trcd */
tctp_clocks = sdram_table[i].tctp; /* 44 - 20ns = 24ns */
/* trc_clocks is sum of trp_clocks + tras_clocks */
trc_clocks = trp_clocks + tras_clocks;
/* get SDRAM timing register */
mtdcr (SDRAM0_CFGADDR, SDRAM0_TR);
sdram_tim = mfdcr (SDRAM0_CFGDATA) & ~0x018FC01F;
/* insert CASL value */
sdram_tim |= ((unsigned long) (cal_val)) << 23;
/* insert PTA value */
sdram_tim |= ((unsigned long) (trp_clocks - 1)) << 18;
/* insert CTP value */
sdram_tim |=
((unsigned long) (trc_clocks - trp_clocks -
trcd_clocks)) << 16;
/* insert LDF (always 01) */
sdram_tim |= ((unsigned long) 0x01) << 14;
/* insert RFTA value */
sdram_tim |= ((unsigned long) (trc_clocks - 4)) << 2;
/* insert RCD value */
sdram_tim |= ((unsigned long) (trcd_clocks - 1)) << 0;
tmp = ((unsigned long) (sdram_table[i].am - 1) << 13); /* AM = 3 */
/* insert SZ value; */
tmp |= ((unsigned long) sdram_table[i].sz << 17);
/* get SDRAM bank 0 register */
mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
sdram_bank = mfdcr (SDRAM0_CFGDATA) & ~0xFFCEE001;
sdram_bank |= (baseaddr | tmp | 0x01);
#ifdef SDRAM_DEBUG
serial_puts ("sdtr: ");
write_4hex (sdram_tim);
serial_puts ("\n");
#endif
/* write SDRAM timing register */
mtdcr (SDRAM0_CFGADDR, SDRAM0_TR);
mtdcr (SDRAM0_CFGDATA, sdram_tim);
#ifdef SDRAM_DEBUG
serial_puts ("mb0cf: ");
write_4hex (sdram_bank);
serial_puts ("\n");
#endif
/* write SDRAM bank 0 register */
mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
mtdcr (SDRAM0_CFGDATA, sdram_bank);
if (get_bus_freq (tmp) > 110000000) { /* > 110MHz */
/* get SDRAM refresh interval register */
mtdcr (SDRAM0_CFGADDR, SDRAM0_RTR);
tmp = mfdcr (SDRAM0_CFGDATA) & ~0x3FF80000;
tmp |= 0x07F00000;
} else {
/* get SDRAM refresh interval register */
mtdcr (SDRAM0_CFGADDR, SDRAM0_RTR);
tmp = mfdcr (SDRAM0_CFGDATA) & ~0x3FF80000;
tmp |= 0x05F00000;
}
/* write SDRAM refresh interval register */
mtdcr (SDRAM0_CFGADDR, SDRAM0_RTR);
mtdcr (SDRAM0_CFGDATA, tmp);
/* enable ECC if used */
#if defined(ENABLE_ECC) && !defined(CONFIG_BOOT_PCI)
if (sdram_table[i].ecc) {
/* disable checking for all banks */
unsigned long *p;
#ifdef SDRAM_DEBUG
serial_puts ("disable ECC.. ");
#endif
mtdcr (SDRAM0_CFGADDR, SDRAM0_ECCCFG);
tmp = mfdcr (SDRAM0_CFGDATA);
tmp &= 0xff0fffff; /* disable all banks */
mtdcr (SDRAM0_CFGADDR, SDRAM0_ECCCFG);
/* set up SDRAM Controller with ECC enabled */
#ifdef SDRAM_DEBUG
serial_puts ("setup SDRAM Controller.. ");
#endif
mtdcr (SDRAM0_CFGDATA, tmp);
mtdcr (SDRAM0_CFGADDR, SDRAM0_CFG);
tmp = (mfdcr (SDRAM0_CFGDATA) & ~0xFFE00000) | 0x90800000;
mtdcr (SDRAM0_CFGADDR, SDRAM0_CFG);
mtdcr (SDRAM0_CFGDATA, tmp);
udelay (600);
#ifdef SDRAM_DEBUG
serial_puts ("fill the memory..\n");
#endif
serial_puts (".");
/* now, fill all the memory */
tmp = ((4 * MEGA_BYTE) << sdram_table[i].sz);
p = (unsigned long) 0;
while ((unsigned long) p < tmp) {
*p++ = 0L;
if (!((unsigned long) p % 0x00800000)) /* every 8MByte */
serial_puts (".");
}
/* enable bank 0 */
serial_puts (".");
#ifdef SDRAM_DEBUG
serial_puts ("enable ECC\n");
#endif
udelay (400);
mtdcr (SDRAM0_CFGADDR, SDRAM0_ECCCFG);
tmp = mfdcr (SDRAM0_CFGDATA);
tmp |= 0x00800000; /* enable bank 0 */
mtdcr (SDRAM0_CFGDATA, tmp);
udelay (400);
} else
#endif
{
/* enable SDRAM controller with no ECC, 32-bit SDRAM width, 16 byte burst */
mtdcr (SDRAM0_CFGADDR, SDRAM0_CFG);
tmp = (mfdcr (SDRAM0_CFGDATA) & ~0xFFE00000) | 0x80C00000;
mtdcr (SDRAM0_CFGADDR, SDRAM0_CFG);
mtdcr (SDRAM0_CFGDATA, tmp);
udelay (400);
}
serial_puts ("\n");
return (0);
}
int board_early_init_f (void)
{
init_sdram ();
/*-------------------------------------------------------------------------+
| Interrupt controller setup for the PIP405 board.
| Note: IRQ 0-15 405GP internally generated; active high; level sensitive
| IRQ 16 405GP internally generated; active low; level sensitive
| IRQ 17-24 RESERVED
| IRQ 25 (EXT IRQ 0) SouthBridge; active low; level sensitive
| IRQ 26 (EXT IRQ 1) NMI: active low; level sensitive
| IRQ 27 (EXT IRQ 2) SMI: active Low; level sensitive
| IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
| IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
| IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
| IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
| Note for MIP405 board:
| An interrupt taken for the SouthBridge (IRQ 25) indicates that
| the Interrupt Controller in the South Bridge has caused the
| interrupt. The IC must be read to determine which device
| caused the interrupt.
|
+-------------------------------------------------------------------------*/
mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
mtdcr (UIC0ER, 0x00000000); /* disable all ints */
mtdcr (UIC0CR, 0x00000000); /* set all to be non-critical (for now) */
mtdcr (UIC0PR, 0xFFFFFF80); /* set int polarities */
mtdcr (UIC0TR, 0x10000000); /* set int trigger levels */
mtdcr (UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
return 0;
}
/*
* Get some PLD Registers
*/
unsigned short get_pld_parvers (void)
{
unsigned short result;
unsigned char rc;
rc = in8 (PLD_PART_REG);
result = (unsigned short) rc << 8;
rc = in8 (PLD_VERS_REG);
result |= rc;
return result;
}
void user_led0 (unsigned char on)
{
if (on)
out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) | 0x4));
else
out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) & 0xfb));
}
void ide_set_reset (int idereset)
{
/* if reset = 1 IDE reset will be asserted */
if (idereset)
out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) | 0x1));
else {
udelay (10000);
out8 (PLD_COM_MODE_REG, (in8 (PLD_COM_MODE_REG) & 0xfe));
}
}
/* ------------------------------------------------------------------------- */
void get_pcbrev_var(unsigned char *pcbrev, unsigned char *var)
{
#if !defined(CONFIG_MIP405T)
unsigned char bc,rc,tmp;
int i;
bc = in8 (PLD_BOARD_CFG_REG);
tmp = ~bc;
tmp &= 0xf;
rc = 0;
for (i = 0; i < 4; i++) {
rc <<= 1;
rc += (tmp & 0x1);
tmp >>= 1;
}
rc++;
if(( (((bc>>4) & 0xf)==0x2) /* Rev C PCB or */
|| (((bc>>4) & 0xf)==0x1)) /* Rev B PCB with */
&& (rc==0x1)) /* Population Option 1 is a -3 */
rc=3;
*pcbrev=(bc >> 4) & 0xf;
*var=rc;
#else
unsigned char bc;
bc = in8 (PLD_BOARD_CFG_REG);
*pcbrev=(bc >> 4) & 0xf;
*var=16-(bc & 0xf);
#endif
}
/*
* Check Board Identity:
*/
/* serial String: "MIP405_1000" OR "MIP405T_1000" */
#if !defined(CONFIG_MIP405T)
#define BOARD_NAME "MIP405"
#else
#define BOARD_NAME "MIP405T"
#endif
int checkboard (void)
{
char s[50];
unsigned char bc, var;
int i;
backup_t *b = (backup_t *) s;
puts ("Board: ");
get_pcbrev_var(&bc,&var);
i = getenv_f("serial#", (char *)s, 32);
if ((i == 0) || strncmp ((char *)s, BOARD_NAME,sizeof(BOARD_NAME))) {
get_backup_values (b);
if (strncmp (b->signature, "MPL\0", 4) != 0) {
puts ("### No HW ID - assuming " BOARD_NAME);
printf ("-%d Rev %c", var, 'A' + bc);
} else {
b->serial_name[sizeof(BOARD_NAME)-1] = 0;
printf ("%s-%d Rev %c SN: %s", b->serial_name, var,
'A' + bc, &b->serial_name[sizeof(BOARD_NAME)]);
}
} else {
s[sizeof(BOARD_NAME)-1] = 0;
printf ("%s-%d Rev %c SN: %s", s, var,'A' + bc,
&s[sizeof(BOARD_NAME)]);
}
bc = in8 (PLD_EXT_CONF_REG);
printf (" Boot Config: 0x%x\n", bc);
return (0);
}
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
/*
initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
the necessary info for SDRAM controller configuration
*/
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
static int test_dram (unsigned long ramsize);
phys_size_t initdram (int board_type)
{
unsigned long bank_reg[4], tmp, bank_size;
int i, ds;
unsigned long TotalSize;
ds = 0;
/* since the DRAM controller is allready set up, calculate the size with the
bank registers */
mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
bank_reg[0] = mfdcr (SDRAM0_CFGDATA);
mtdcr (SDRAM0_CFGADDR, SDRAM0_B1CR);
bank_reg[1] = mfdcr (SDRAM0_CFGDATA);
mtdcr (SDRAM0_CFGADDR, SDRAM0_B2CR);
bank_reg[2] = mfdcr (SDRAM0_CFGDATA);
mtdcr (SDRAM0_CFGADDR, SDRAM0_B3CR);
bank_reg[3] = mfdcr (SDRAM0_CFGDATA);
TotalSize = 0;
for (i = 0; i < 4; i++) {
if ((bank_reg[i] & 0x1) == 0x1) {
tmp = (bank_reg[i] >> 17) & 0x7;
bank_size = 4 << tmp;
TotalSize += bank_size;
} else
ds = 1;
}
mtdcr (SDRAM0_CFGADDR, SDRAM0_ECCCFG);
tmp = mfdcr (SDRAM0_CFGDATA);
if (!tmp)
printf ("No ");
printf ("ECC ");
test_dram (TotalSize * MEGA_BYTE);
return (TotalSize * MEGA_BYTE);
}
/* ------------------------------------------------------------------------- */
static int test_dram (unsigned long ramsize)
{
#ifdef SDRAM_DEBUG
mem_test (0L, ramsize, 1);
#endif
/* not yet implemented */
return (1);
}
/* used to check if the time in RTC is valid */
static unsigned long start;
static struct rtc_time tm;
extern flash_info_t flash_info[]; /* info for FLASH chips */
int misc_init_r (void)
{
/* adjust flash start and size as well as the offset */
gd->bd->bi_flashstart=0-flash_info[0].size;
gd->bd->bi_flashsize=flash_info[0].size-CONFIG_SYS_MONITOR_LEN;
gd->bd->bi_flashoffset=0;
/* check, if RTC is running */
rtc_get (&tm);
start=get_timer(0);
/* if MIP405 has booted from PCI, reset CCR0[24] as described in errata PCI_18 */
if (mfdcr(CPC0_PSR) & PSR_ROM_LOC)
mtspr(SPRN_CCR0, (mfspr(SPRN_CCR0) & ~0x80));
return (0);
}
void print_mip405_rev (void)
{
unsigned char part, vers, pcbrev, var;
get_pcbrev_var(&pcbrev,&var);
part = in8 (PLD_PART_REG);
vers = in8 (PLD_VERS_REG);
printf ("Rev: " BOARD_NAME "-%d Rev %c PLD %d Vers %d\n",
var, pcbrev + 'A', part & 0x7F, vers);
}
extern int mk_date (char *, struct rtc_time *);
int last_stage_init (void)
{
unsigned long stop;
struct rtc_time newtm;
char *s;
/* write correct LED configuration */
if (miiphy_write("ppc_4xx_eth0", 0x1, 0x14, 0x2402) != 0) {
printf ("Error writing to the PHY\n");
}
/* since LED/CFG2 is not connected on the -2,
* write to correct capability information */
if (miiphy_write("ppc_4xx_eth0", 0x1, 0x4, 0x01E1) != 0) {
printf ("Error writing to the PHY\n");
}
print_mip405_rev ();
stdio_print_current_devices ();
check_env ();
/* check if RTC time is valid */
stop=get_timer(start);
while(stop<1200) { /* we wait 1.2 sec to check if the RTC is running */
udelay(1000);
stop=get_timer(start);
}
rtc_get (&newtm);
if(tm.tm_sec==newtm.tm_sec) {
s=getenv("defaultdate");
if(!s)
mk_date ("010112001970", &newtm);
else
if(mk_date (s, &newtm)!=0) {
printf("RTC: Bad date format in defaultdate\n");
return 0;
}
rtc_reset ();
rtc_set(&newtm);
}
return 0;
}
/***************************************************************************
* some helping routines
*/
int overwrite_console (void)
{
return ((in8 (PLD_EXT_CONF_REG) & 0x1)==0); /* return TRUE if console should be overwritten */
}
/************************************************************************
* Print MIP405 Info
************************************************************************/
void print_mip405_info (void)
{
unsigned char part, vers, cfg, irq_reg, com_mode, ext;
part = in8 (PLD_PART_REG);
vers = in8 (PLD_VERS_REG);
cfg = in8 (PLD_BOARD_CFG_REG);
irq_reg = in8 (PLD_IRQ_REG);
com_mode = in8 (PLD_COM_MODE_REG);
ext = in8 (PLD_EXT_CONF_REG);
printf ("PLD Part %d version %d\n", part & 0x7F, vers);
printf ("Board Revision %c\n", ((cfg >> 4) & 0xf) + 'A');
printf ("Population Options %d %d %d %d\n", (cfg) & 0x1,
(cfg >> 1) & 0x1, (cfg >> 2) & 0x1, (cfg >> 3) & 0x1);
printf ("User LED %s\n", (com_mode & 0x4) ? "on" : "off");
printf ("UART Clocks %d\n", (com_mode >> 4) & 0x3);
#if !defined(CONFIG_MIP405T)
printf ("User Config Switch %d %d %d %d %d %d %d %d\n",
(ext) & 0x1, (ext >> 1) & 0x1, (ext >> 2) & 0x1,
(ext >> 3) & 0x1, (ext >> 4) & 0x1, (ext >> 5) & 0x1,
(ext >> 6) & 0x1, (ext >> 7) & 0x1);
printf ("SER1 uses handshakes %s\n",
(ext & 0x80) ? "DTR/DSR" : "RTS/CTS");
#else
printf ("User Config Switch %d %d %d %d %d %d %d %d\n",
(ext) & 0x1, (ext >> 1) & 0x1, (ext >> 2) & 0x1,
(ext >> 3) & 0x1, (ext >> 4) & 0x1, (ext >> 5) & 0x1,
(ext >> 6) & 0x1,(ext >> 7) & 0x1);
#endif
printf ("IDE Reset %s\n", (ext & 0x01) ? "asserted" : "not asserted");
printf ("IRQs:\n");
printf (" PIIX INTR: %s\n", (irq_reg & 0x80) ? "inactive" : "active");
#if !defined(CONFIG_MIP405T)
printf (" UART0 IRQ: %s\n", (irq_reg & 0x40) ? "inactive" : "active");
printf (" UART1 IRQ: %s\n", (irq_reg & 0x20) ? "inactive" : "active");
#endif
printf (" PIIX SMI: %s\n", (irq_reg & 0x10) ? "inactive" : "active");
printf (" PIIX INIT: %s\n", (irq_reg & 0x8) ? "inactive" : "active");
printf (" PIIX NMI: %s\n", (irq_reg & 0x4) ? "inactive" : "active");
}
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