u-boot/board/sandburst/common/sb_common.c
Stefan Roese a760b02031 ppc4xx: Consolidate pci_pre_init() function
This patch removes the duplicted implementations of the pci_pre_init()
function by introducing a weak default function for it. This weak default
has a different implementation for some PPC variants. It can be
overridden by a board specific version.

Signed-off-by: Stefan Roese <sr@denx.de>
2009-11-19 11:35:30 +01:00

365 lines
8.7 KiB
C

/*
* Copyright (C) 2005 Sandburst Corporation
*
* 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 <command.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <spd_sdram.h>
#include <i2c.h>
#include "ppc440gx_i2c.h"
#include "sb_common.h"
DECLARE_GLOBAL_DATA_PTR;
long int fixed_sdram (void);
/*************************************************************************
* metrobox_get_master
*
* PRI_N - active low signal. If the GPIO pin is low we are the master
*
************************************************************************/
int sbcommon_get_master(void)
{
ppc440_gpio_regs_t *gpio_regs;
gpio_regs = (ppc440_gpio_regs_t *)CONFIG_SYS_GPIO_BASE;
if (gpio_regs->in & SBCOMMON_GPIO_PRI_N) {
return 0;
}
else {
return 1;
}
}
/*************************************************************************
* metrobox_secondary_present
*
* Figure out if secondary/slave board is present
*
************************************************************************/
int sbcommon_secondary_present(void)
{
ppc440_gpio_regs_t *gpio_regs;
gpio_regs = (ppc440_gpio_regs_t *)CONFIG_SYS_GPIO_BASE;
if (gpio_regs->in & SBCOMMON_GPIO_SEC_PRES)
return 0;
else
return 1;
}
/*************************************************************************
* sbcommon_get_serial_number
*
* Retrieve the board serial number via the mac address in eeprom
*
************************************************************************/
unsigned short sbcommon_get_serial_number(void)
{
unsigned char buff[0x100];
unsigned short sernum;
/* Get the board serial number from eeprom */
/* Initialize I2C */
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
/* Read 256 bytes in EEPROM */
i2c_read (0x50, 0, 1, buff, 0x100);
memcpy(&sernum, &buff[0xF4], 2);
sernum /= 32;
return (sernum);
}
/*************************************************************************
* sbcommon_fans
*
* Spin up fans 2 & 3 to get some air moving. OS will take care
* of the rest. This is mostly a precaution...
*
* Assumes i2c bus 1 is ready.
*
************************************************************************/
void sbcommon_fans(void)
{
/*
* Attempt to turn on 2 of the fans...
* Need to go through the bridge
*/
puts ("FANS: ");
/* select fan4 through the bridge */
i2c_reg_write1(0x73, /* addr */
0x00, /* reg */
0x08); /* val = bus 4 */
/* Turn on FAN 4 */
i2c_reg_write1(0x2e,
1,
0x80);
i2c_reg_write1(0x2e,
0,
0x19);
/* Deselect bus 4 on the bridge */
i2c_reg_write1(0x73,
0x00,
0x00);
/* select fan3 through the bridge */
i2c_reg_write1(0x73, /* addr */
0x00, /* reg */
0x04); /* val = bus 3 */
/* Turn on FAN 3 */
i2c_reg_write1(0x2e,
1,
0x80);
i2c_reg_write1(0x2e,
0,
0x19);
/* Deselect bus 3 on the bridge */
i2c_reg_write1(0x73,
0x00,
0x00);
/* select fan2 through the bridge */
i2c_reg_write1(0x73, /* addr */
0x00, /* reg */
0x02); /* val = bus 4 */
/* Turn on FAN 2 */
i2c_reg_write1(0x2e,
1,
0x80);
i2c_reg_write1(0x2e,
0,
0x19);
/* Deselect bus 2 on the bridge */
i2c_reg_write1(0x73,
0x00,
0x00);
/* select fan1 through the bridge */
i2c_reg_write1(0x73, /* addr */
0x00, /* reg */
0x01); /* val = bus 0 */
/* Turn on FAN 1 */
i2c_reg_write1(0x2e,
1,
0x80);
i2c_reg_write1(0x2e,
0,
0x19);
/* Deselect bus 1 on the bridge */
i2c_reg_write1(0x73,
0x00,
0x00);
puts ("on\n");
return;
}
/*************************************************************************
* initdram
*
* Initialize sdram
*
************************************************************************/
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;
}
/*************************************************************************
* testdram
*
*
************************************************************************/
#if defined(CONFIG_SYS_DRAM_TEST)
int testdram (void)
{
uint *pstart = (uint *) CONFIG_SYS_MEMTEST_START;
uint *pend = (uint *) CONFIG_SYS_MEMTEST_END;
uint *p;
printf("Testing SDRAM: ");
for (p = pstart; p < pend; p++)
*p = 0xaaaaaaaa;
for (p = pstart; p < pend; p++) {
if (*p != 0xaaaaaaaa) {
printf ("SDRAM test fails at: %08x\n", (uint) p);
return 1;
}
}
for (p = pstart; p < pend; p++)
*p = 0x55555555;
for (p = pstart; p < pend; p++) {
if (*p != 0x55555555) {
printf ("SDRAM test fails at: %08x\n", (uint) p);
return 1;
}
}
printf("OK\n");
return 0;
}
#endif
#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) */
/*************************************************************************
* board_get_enetaddr
*
* Get the ethernet MAC address for the management ethernet from the
* strap EEPROM. Note that is the BASE address for the range of
* external ethernet MACs on the board. The base + 31 is the actual
* mgmt mac address.
*
************************************************************************/
void board_get_enetaddr(int macaddr_idx, uchar *enet)
{
int i;
unsigned short tmp;
unsigned char buff[0x100], *cp;
if (0 == macaddr_idx) {
/* Initialize I2C */
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
/* Read 256 bytes in EEPROM */
i2c_read (0x50, 0, 1, buff, 0x100);
cp = &buff[0xF0];
for (i = 0; i < 6; i++,cp++)
enet[i] = *cp;
memcpy(&tmp, &enet[4], 2);
tmp += 31;
memcpy(&enet[4], &tmp, 2);
} else {
enet[0] = 0x02;
enet[1] = 0x00;
enet[2] = 0x00;
enet[3] = 0x00;
enet[4] = 0x00;
if (1 == sbcommon_get_master() ) {
/* Master/Primary card */
enet[5] = 0x01;
} else {
/* Slave/Secondary card */
enet [5] = 0x02;
}
}
return;
}
#ifdef CONFIG_POST
/*
* Returns 1 if keys pressed to start the power-on long-running tests
* Called from board_init_f().
*/
int post_hotkeys_pressed(void)
{
return (ctrlc());
}
#endif