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/*
* Copyright (C) 2002 Scott McNutt <smcnutt@artesyncp.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 <asm/processor.h>
#include <spd_sdram.h>
#define BOOT_SMALL_FLASH 32 /* 00100000 */
#define FLASH_ONBD_N 2 /* 00000010 */
#define FLASH_SRAM_SEL 1 /* 00000001 */
DECLARE_GLOBAL_DATA_PTR;
long int fixed_sdram(void);
int board_early_init_f(void)
{
uint reg;
unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
unsigned char status;
/*--------------------------------------------------------------------
* Setup the external bus controller/chip selects
*-------------------------------------------------------------------*/
mtdcr(EBC0_CFGADDR, EBC0_CFG);
reg = mfdcr(EBC0_CFGDATA);
mtdcr(EBC0_CFGDATA, reg | 0x04000000); /* Set ATC */
mtebc(PB1AP, 0x02815480); /* NVRAM/RTC */
mtebc(PB1CR, 0x48018000); /* BA=0x480 1MB R/W 8-bit */
mtebc(PB7AP, 0x01015280); /* FPGA registers */
mtebc(PB7CR, 0x48318000); /* BA=0x483 1MB R/W 8-bit */
/* read FPGA_REG0 and set the bus controller */
status = *fpga_base;
if ((status & BOOT_SMALL_FLASH) && !(status & FLASH_ONBD_N)) {
mtebc(PB0AP, 0x9b015480); /* FLASH/SRAM */
mtebc(PB0CR, 0xfff18000); /* BAS=0xfff 1MB R/W 8-bit */
mtebc(PB2AP, 0x9b015480); /* 4MB FLASH */
mtebc(PB2CR, 0xff858000); /* BAS=0xff8 4MB R/W 8-bit */
} else {
mtebc(PB0AP, 0x9b015480); /* 4MB FLASH */
mtebc(PB0CR, 0xffc58000); /* BAS=0xffc 4MB R/W 8-bit */
/* set CS2 if FLASH_ONBD_N == 0 */
if (!(status & FLASH_ONBD_N)) {
mtebc(PB2AP, 0x9b015480); /* FLASH/SRAM */
mtebc(PB2CR, 0xff818000); /* BAS=0xff8 4MB R/W 8-bit */
}
}
/*--------------------------------------------------------------------
* Setup the interrupt controller polarities, triggers, etc.
*-------------------------------------------------------------------*/
mtdcr(UIC0SR, 0xffffffff); /* clear all */
mtdcr(UIC0ER, 0x00000000); /* disable all */
mtdcr(UIC0CR, 0x00000009); /* SMI & UIC1 crit are critical */
mtdcr(UIC0PR, 0xfffffe13); /* per ref-board manual */
mtdcr(UIC0TR, 0x01c00008); /* per ref-board manual */
mtdcr(UIC0VR, 0x00000001); /* int31 highest, base=0x000 */
mtdcr(UIC0SR, 0xffffffff); /* clear all */
mtdcr(UIC1SR, 0xffffffff); /* clear all */
mtdcr(UIC1ER, 0x00000000); /* disable all */
mtdcr(UIC1CR, 0x00000000); /* all non-critical */
mtdcr(UIC1PR, 0xffffe0ff); /* per ref-board manual */
mtdcr(UIC1TR, 0x00ffc000); /* per ref-board manual */
mtdcr(UIC1VR, 0x00000001); /* int31 highest, base=0x000 */
mtdcr(UIC1SR, 0xffffffff); /* clear all */
return 0;
}
int checkboard(void)
{
char buf[64];
int i = getenv_f("serial#", buf, sizeof(buf));
printf("Board: Ebony - AMCC PPC440GP Evaluation Board");
if (i > 0) {
puts(", serial# ");
puts(buf);
}
putc('\n');
return (0);
}
phys_size_t initdram(int board_type)
{
long dram_size = 0;
#if defined(CONFIG_SPD_EEPROM)
dram_size = spd_sdram();
#else
dram_size = fixed_sdram();
#endif
return dram_size;
}
#if !defined(CONFIG_SPD_EEPROM)
/*************************************************************************
* fixed sdram init -- doesn't use serial presence detect.
*
* Assumes: 128 MB, non-ECC, non-registered
* PLB @ 133 MHz
*
************************************************************************/
long int fixed_sdram(void)
{
uint reg;
/*--------------------------------------------------------------------
* Setup some default
*------------------------------------------------------------------*/
mtsdram(SDRAM0_UABBA, 0x00000000); /* ubba=0 (default) */
mtsdram(SDRAM0_SLIO, 0x00000000); /* rdre=0 wrre=0 rarw=0 */
mtsdram(SDRAM0_DEVOPT, 0x00000000); /* dll=0 ds=0 (normal) */
mtsdram(SDRAM0_WDDCTR, 0x00000000); /* wrcp=0 dcd=0 */
mtsdram(SDRAM0_CLKTR, 0x40000000); /* clkp=1 (90 deg wr) dcdt=0 */
/*--------------------------------------------------------------------
* Setup for board-specific specific mem
*------------------------------------------------------------------*/
/*
* Following for CAS Latency = 2.5 @ 133 MHz PLB
*/
mtsdram(SDRAM0_B0CR, 0x000a4001); /* SDBA=0x000 128MB, Mode 3, enabled */
mtsdram(SDRAM0_TR0, 0x410a4012); /* WR=2 WD=1 CL=2.5 PA=3 CP=4 LD=2 */
/* RA=10 RD=3 */
mtsdram(SDRAM0_TR1, 0x8080082f); /* SS=T2 SL=STAGE 3 CD=1 CT=0x02f */
mtsdram(SDRAM0_RTR, 0x08200000); /* Rate 15.625 ns @ 133 MHz PLB */
mtsdram(SDRAM0_CFG1, 0x00000000); /* Self-refresh exit, disable PM */
udelay(400); /* Delay 200 usecs (min) */
/*--------------------------------------------------------------------
* Enable the controller, then wait for DCEN to complete
*------------------------------------------------------------------*/
mtsdram(SDRAM0_CFG0, 0x86000000); /* DCEN=1, PMUD=1, 64-bit */
for (;;) {
mfsdram(SDRAM0_MCSTS, reg);
if (reg & 0x80000000)
break;
}
return (128 * 1024 * 1024); /* 128 MB */
}
#endif /* !defined(CONFIG_SPD_EEPROM) */
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