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u-boot/board/icecube/icecube.c
Simon Glass e895a4b06f fdt: Allow ft_board_setup() to report failure 
This function can fail if the device tree runs out of space. Rather than
silently booting with an incomplete device tree, allow the failure to be
detected.

Unfortunately this involves changing a lot of places in the code. I have
not changed behvaiour to return an error where one is not currently
returned, to avoid unexpected breakage.

Eventually it would be nice to allow boards to register functions to be
called to update the device tree. This would avoid all the many functions
to do this. However it's not clear yet if this should be done using driver
model or with a linker list. This work is left for later.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
2014-11-21 04:43:15 +01:00

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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2004
* Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <mpc5xxx.h>
#include <pci.h>
#include <asm/processor.h>
#include <libfdt.h>
#include <netdev.h>
#if defined(CONFIG_LITE5200B)
#include "mt46v32m16.h"
#else
# if defined(CONFIG_MPC5200_DDR)
# include "mt46v16m16-75.h"
# else
#include "mt48lc16m16a2-75.h"
# endif
#endif
#ifdef CONFIG_LITE5200B_PM
/* u-boot part of low-power mode implementation */
#define SAVED_ADDR (*(void **)0x00000000)
#define PSC2_4 0x02
void lite5200b_wakeup(void)
{
unsigned char wakeup_pin;
void (*linux_wakeup)(void);
/* check PSC2_4, if it's down "QT" is signaling we have a wakeup
* from low power mode */
*(vu_char *)MPC5XXX_WU_GPIO_ENABLE = PSC2_4;
__asm__ volatile ("sync");
wakeup_pin = *(vu_char *)MPC5XXX_WU_GPIO_DATA_I;
if (wakeup_pin & PSC2_4)
return;
/* acknowledge to "QT"
* by holding pin at 1 for 10 uS */
*(vu_char *)MPC5XXX_WU_GPIO_DIR = PSC2_4;
__asm__ volatile ("sync");
*(vu_char *)MPC5XXX_WU_GPIO_DATA_O = PSC2_4;
__asm__ volatile ("sync");
udelay(10);
/* put ram out of self-refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL |= 0x80000000; /* mode_en */
__asm__ volatile ("sync");
*(vu_long *)MPC5XXX_SDRAM_CTRL |= 0x50000000; /* cke ref_en */
__asm__ volatile ("sync");
*(vu_long *)MPC5XXX_SDRAM_CTRL &= ~0x80000000; /* !mode_en */
__asm__ volatile ("sync");
udelay(10); /* wait a bit */
/* jump back to linux kernel code */
linux_wakeup = SAVED_ADDR;
printf("\n\nLooks like we just woke, transferring control to 0x%08lx\n",
(unsigned long)linux_wakeup);
linux_wakeup();
}
#else
#define lite5200b_wakeup()
#endif
#ifndef CONFIG_SYS_RAMBOOT
static void sdram_start (int hi_addr)
{
long hi_addr_bit = hi_addr ? 0x01000000 : 0;
/* unlock mode register */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit;
__asm__ volatile ("sync");
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
__asm__ volatile ("sync");
#if SDRAM_DDR
/* set mode register: extended mode */
*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_EMODE;
__asm__ volatile ("sync");
/* set mode register: reset DLL */
*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000;
__asm__ volatile ("sync");
#endif
/* precharge all banks */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
__asm__ volatile ("sync");
/* auto refresh */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit;
__asm__ volatile ("sync");
/* set mode register */
*(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
__asm__ volatile ("sync");
/* normal operation */
*(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
__asm__ volatile ("sync");
}
#endif
/*
* ATTENTION: Although partially referenced initdram does NOT make real use
* use of CONFIG_SYS_SDRAM_BASE. The code does not work if CONFIG_SYS_SDRAM_BASE
* is something else than 0x00000000.
*/
phys_size_t initdram (int board_type)
{
ulong dramsize = 0;
ulong dramsize2 = 0;
uint svr, pvr;
#ifndef CONFIG_SYS_RAMBOOT
ulong test1, test2;
/* setup SDRAM chip selects */
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e;/* 2G at 0x0 */
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;/* disabled */
__asm__ volatile ("sync");
/* setup config registers */
*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
__asm__ volatile ("sync");
#if SDRAM_DDR
/* set tap delay */
*(vu_long *)MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY;
__asm__ volatile ("sync");
#endif
/* find RAM size using SDRAM CS0 only */
sdram_start(0);
test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
sdram_start(1);
test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
if (test1 > test2) {
sdram_start(0);
dramsize = test1;
} else {
dramsize = test2;
}
/* memory smaller than 1MB is impossible */
if (dramsize < (1 << 20)) {
dramsize = 0;
}
/* set SDRAM CS0 size according to the amount of RAM found */
if (dramsize > 0) {
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 + __builtin_ffs(dramsize >> 20) - 1;
} else {
*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
}
/* let SDRAM CS1 start right after CS0 */
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize + 0x0000001e;/* 2G */
/* find RAM size using SDRAM CS1 only */
if (!dramsize)
sdram_start(0);
test2 = test1 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
if (!dramsize) {
sdram_start(1);
test2 = get_ram_size((long *)(CONFIG_SYS_SDRAM_BASE + dramsize), 0x80000000);
}
if (test1 > test2) {
sdram_start(0);
dramsize2 = test1;
} else {
dramsize2 = test2;
}
/* memory smaller than 1MB is impossible */
if (dramsize2 < (1 << 20)) {
dramsize2 = 0;
}
/* set SDRAM CS1 size according to the amount of RAM found */
if (dramsize2 > 0) {
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize
| (0x13 + __builtin_ffs(dramsize2 >> 20) - 1);
} else {
*(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
}
#else /* CONFIG_SYS_RAMBOOT */
/* retrieve size of memory connected to SDRAM CS0 */
dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
if (dramsize >= 0x13) {
dramsize = (1 << (dramsize - 0x13)) << 20;
} else {
dramsize = 0;
}
/* retrieve size of memory connected to SDRAM CS1 */
dramsize2 = *(vu_long *)MPC5XXX_SDRAM_CS1CFG & 0xFF;
if (dramsize2 >= 0x13) {
dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
} else {
dramsize2 = 0;
}
#endif /* CONFIG_SYS_RAMBOOT */
/*
* On MPC5200B we need to set the special configuration delay in the
* DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM
* Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
*
* "The SDelay should be written to a value of 0x00000004. It is
* required to account for changes caused by normal wafer processing
* parameters."
*/
svr = get_svr();
pvr = get_pvr();
if ((SVR_MJREV(svr) >= 2) &&
(PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) {
*(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
__asm__ volatile ("sync");
}
lite5200b_wakeup();
return dramsize + dramsize2;
}
int checkboard (void)
{
#if defined (CONFIG_LITE5200B)
puts ("Board: Freescale Lite5200B\n");
#else
puts ("Board: Motorola MPC5200 (IceCube)\n");
#endif
return 0;
}
void flash_preinit(void)
{
/*
* Now, when we are in RAM, enable flash write
* access for detection process.
* Note that CS_BOOT cannot be cleared when
* executing in flash.
*/
*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
}
void flash_afterinit(ulong size)
{
if (size == 0x800000) { /* adjust mapping */
*(vu_long *)MPC5XXX_BOOTCS_START = *(vu_long *)MPC5XXX_CS0_START =
START_REG(CONFIG_SYS_BOOTCS_START | size);
*(vu_long *)MPC5XXX_BOOTCS_STOP = *(vu_long *)MPC5XXX_CS0_STOP =
STOP_REG(CONFIG_SYS_BOOTCS_START | size, size);
}
}
#ifdef CONFIG_PCI
static struct pci_controller hose;
extern void pci_mpc5xxx_init(struct pci_controller *);
void pci_init_board(void)
{
pci_mpc5xxx_init(&hose);
}
#endif
#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_RESET)
void init_ide_reset (void)
{
debug ("init_ide_reset\n");
/* Configure PSC1_4 as GPIO output for ATA reset */
*(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_PSC1_4;
*(vu_long *) MPC5XXX_WU_GPIO_DIR |= GPIO_PSC1_4;
/* Deassert reset */
*(vu_long *) MPC5XXX_WU_GPIO_DATA_O |= GPIO_PSC1_4;
}
void ide_set_reset (int idereset)
{
debug ("ide_reset(%d)\n", idereset);
if (idereset) {
*(vu_long *) MPC5XXX_WU_GPIO_DATA_O &= ~GPIO_PSC1_4;
/* Make a delay. MPC5200 spec says 25 usec min */
udelay(500000);
} else {
*(vu_long *) MPC5XXX_WU_GPIO_DATA_O |= GPIO_PSC1_4;
}
}
#endif
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
ft_cpu_setup(blob, bd);
return 0;
}
#endif
int board_eth_init(bd_t *bis)
{
cpu_eth_init(bis); /* Built in FEC comes first */
return pci_eth_init(bis);
}
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