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u-boot-brain/board/a4m072/a4m072.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.
*
* (C) Copyright 2010
* Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <mpc5xxx.h>
#include <pci.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <libfdt.h>
#include <netdev.h>
#include <led-display.h>
#include <linux/err.h>
#include "mt46v32m16.h"
#ifndef CONFIG_SYS_RAMBOOT
static void sdram_start (int hi_addr)
{
long hi_addr_bit = hi_addr ? 0x01000000 : 0;
long control = SDRAM_CONTROL | hi_addr_bit;
/* unlock mode register */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000000);
__asm__ volatile ("sync");
/* precharge all banks */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
__asm__ volatile ("sync");
#if SDRAM_DDR
/* set mode register: extended mode */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_EMODE);
__asm__ volatile ("sync");
/* set mode register: reset DLL */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE | 0x04000000);
__asm__ volatile ("sync");
#endif
/* precharge all banks */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
__asm__ volatile ("sync");
/* auto refresh */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000004);
__asm__ volatile ("sync");
/* set mode register */
out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE);
__asm__ volatile ("sync");
/* normal operation */
out_be32((void *)MPC5XXX_SDRAM_CTRL, control);
__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;
uint svr, pvr;
#ifndef CONFIG_SYS_RAMBOOT
ulong test1, test2;
/* setup SDRAM chip selects */
out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0x0000001e); /* 2GB at 0x0 */
out_be32((void *)MPC5XXX_SDRAM_CS1CFG, 0x80000000); /* disabled */
__asm__ volatile ("sync");
/* setup config registers */
out_be32((void *)MPC5XXX_SDRAM_CONFIG1, SDRAM_CONFIG1);
out_be32((void *)MPC5XXX_SDRAM_CONFIG2, SDRAM_CONFIG2);
__asm__ volatile ("sync");
#if SDRAM_DDR
/* set tap delay */
out_be32((void *)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) {
out_be32((void *)MPC5XXX_SDRAM_CS0CFG,
0x13 + __builtin_ffs(dramsize >> 20) - 1);
} else {
out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0); /* disabled */
}
#else /* CONFIG_SYS_RAMBOOT */
/* retrieve size of memory connected to SDRAM CS0 */
dramsize = in_be32((void *)MPC5XXX_SDRAM_CS0CFG) & 0xFF;
if (dramsize >= 0x13) {
dramsize = (1 << (dramsize - 0x13)) << 20;
} else {
dramsize = 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)) {
out_be32((void *)MPC5XXX_SDRAM_SDELAY, 0x04);
__asm__ volatile ("sync");
}
return dramsize;
}
int checkboard (void)
{
puts ("Board: A4M072\n");
return 0;
}
#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_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)
{
int rv, num_if = 0;
/* Initialize TSECs first */
if ((rv = cpu_eth_init(bis)) >= 0)
num_if += rv;
else
printf("ERROR: failed to initialize FEC.\n");
if ((rv = pci_eth_init(bis)) >= 0)
num_if += rv;
else
printf("ERROR: failed to initialize PCI Ethernet.\n");
return num_if;
}
/*
* Miscellaneous late-boot configurations
*
* Initialize EEPROM write-protect GPIO pin.
*/
int misc_init_r(void)
{
#if defined(CONFIG_SYS_EEPROM_WREN)
/* Enable GPIO pin */
setbits_be32((void *)MPC5XXX_WU_GPIO_ENABLE, CONFIG_SYS_EEPROM_WP);
/* Set direction, output */
setbits_be32((void *)MPC5XXX_WU_GPIO_DIR, CONFIG_SYS_EEPROM_WP);
/* De-assert write enable */
setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
#endif
return 0;
}
#if defined(CONFIG_SYS_EEPROM_WREN)
/* Input: <dev_addr> I2C address of EEPROM device to enable.
* <state> -1: deliver current state
* 0: disable write
* 1: enable write
* Returns: -1: wrong device address
* 0: dis-/en- able done
* 0/1: current state if <state> was -1.
*/
int eeprom_write_enable (unsigned dev_addr, int state)
{
if (CONFIG_SYS_I2C_EEPROM_ADDR != dev_addr) {
return -1;
} else {
switch (state) {
case 1:
/* Enable write access */
clrbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
state = 0;
break;
case 0:
/* Disable write access */
setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
state = 0;
break;
default:
/* Read current status back. */
state = (0 == (in_be32((void *)MPC5XXX_WU_GPIO_DATA_O) &
CONFIG_SYS_EEPROM_WP));
break;
}
}
return state;
}
#endif
#ifdef CONFIG_CMD_DISPLAY
#define DISPLAY_BUF_SIZE 2
static u8 display_buf[DISPLAY_BUF_SIZE];
static u8 display_putc_pos;
static u8 display_out_pos;
void display_set(int cmd) {
if (cmd & DISPLAY_CLEAR) {
display_buf[0] = display_buf[1] = 0;
}
if (cmd & DISPLAY_HOME) {
display_putc_pos = 0;
}
}
#define SEG_A (1<<0)
#define SEG_B (1<<1)
#define SEG_C (1<<2)
#define SEG_D (1<<3)
#define SEG_E (1<<4)
#define SEG_F (1<<5)
#define SEG_G (1<<6)
#define SEG_P (1<<7)
#define SEG__ 0
/*
* +- A -+
* | |
* F B
* | |
* +- G -+
* | |
* E C
* | |
* +- D -+ P
*
* 0..9 index 0..9
* A..Z index 10..35
* - index 36
* _ index 37
* . index 38
*/
#define SYMBOL_DASH (36)
#define SYMBOL_UNDERLINE (37)
#define SYMBOL_DOT (38)
static u8 display_char2seg7_tbl[]=
{
SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, /* 0 */
SEG_B | SEG_C, /* 1 */
SEG_A | SEG_B | SEG_D | SEG_E | SEG_G, /* 2 */
SEG_A | SEG_B | SEG_C | SEG_D | SEG_G, /* 3 */
SEG_B | SEG_C | SEG_F | SEG_G, /* 4 */
SEG_A | SEG_C | SEG_D | SEG_F | SEG_G, /* 5 */
SEG_A | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, /* 6 */
SEG_A | SEG_B | SEG_C, /* 7 */
SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, /* 8 */
SEG_A | SEG_B | SEG_C | SEG_D | SEG_F | SEG_G, /* 9 */
SEG_A | SEG_B | SEG_C | SEG_E | SEG_F | SEG_G, /* A */
SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, /* b */
SEG_A | SEG_D | SEG_E | SEG_F, /* C */
SEG_B | SEG_C | SEG_D | SEG_E | SEG_G, /* d */
SEG_A | SEG_D | SEG_E | SEG_F | SEG_G, /* E */
SEG_A | SEG_E | SEG_F | SEG_G, /* F */
0, /* g - not displayed */
SEG_B | SEG_C | SEG_E | SEG_F | SEG_G, /* H */
SEG_B | SEG_C, /* I */
0, /* J - not displayed */
0, /* K - not displayed */
SEG_D | SEG_E | SEG_F, /* L */
0, /* m - not displayed */
0, /* n - not displayed */
SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, /* O */
SEG_A | SEG_B | SEG_E | SEG_F | SEG_G, /* P */
0, /* q - not displayed */
0, /* r - not displayed */
SEG_A | SEG_C | SEG_D | SEG_F | SEG_G, /* S */
SEG_D | SEG_E | SEG_F | SEG_G, /* t */
SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, /* U */
0, /* V - not displayed */
0, /* w - not displayed */
0, /* X - not displayed */
SEG_B | SEG_C | SEG_D | SEG_F | SEG_G, /* Y */
0, /* Z - not displayed */
SEG_G, /* - */
SEG_D, /* _ */
SEG_P /* . */
};
/* Convert char to the LED segments representation */
static u8 display_char2seg7(char c)
{
u8 val = 0;
if (c >= '0' && c <= '9')
c -= '0';
else if (c >= 'a' && c <= 'z')
c -= 'a' - 10;
else if (c >= 'A' && c <= 'Z')
c -= 'A' - 10;
else if (c == '-')
c = SYMBOL_DASH;
else if (c == '_')
c = SYMBOL_UNDERLINE;
else if (c == '.')
c = SYMBOL_DOT;
else
c = ' '; /* display unsupported symbols as space */
if (c != ' ')
val = display_char2seg7_tbl[(int)c];
return val;
}
int display_putc(char c)
{
if (display_putc_pos >= DISPLAY_BUF_SIZE)
return -1;
display_buf[display_putc_pos++] = display_char2seg7(c);
/* one-symbol message should be steady */
if (display_putc_pos == 1)
display_buf[display_putc_pos] = display_char2seg7(c);
return c;
}
/*
* Flush current symbol to the LED display hardware
*/
static inline void display_flush(void)
{
u32 val = display_buf[display_out_pos];
val |= (val << 8) | (val << 16) | (val << 24);
out_be32((void *)CONFIG_SYS_DISP_CHR_RAM, val);
}
/*
* Output contents of the software display buffer to the LED display every 0.5s
*/
void board_show_activity(ulong timestamp)
{
static ulong last;
static u8 once;
if (!once || (timestamp - last >= (CONFIG_SYS_HZ / 2))) {
display_flush();
display_out_pos ^= 1;
last = timestamp;
once = 1;
}
}
/*
* Empty fake function
*/
void show_activity(int arg)
{
}
#endif
#if defined (CONFIG_SHOW_BOOT_PROGRESS)
static int a4m072_status2code(int status, char *buf)
{
char c = 0;
if (((status > 0) && (status <= 8)) ||
((status >= 100) && (status <= 108)) ||
((status < 0) && (status >= -9)) ||
(status == -100) || (status == -101) ||
((status <= -103) && (status >= -113))) {
c = '5';
} else if (((status >= 9) && (status <= 14)) ||
((status >= 120) && (status <= 123)) ||
((status >= 125) && (status <= 129)) ||
((status >= -13) && (status <= -10)) ||
(status == -120) || (status == -122) ||
((status <= -124) && (status >= -127)) ||
(status == -129)) {
c = '8';
} else if (status == 15) {
c = '9';
} else if ((status <= -30) && (status >= -32)) {
c = 'A';
} else if (((status <= -35) && (status >= -40)) ||
((status <= -42) && (status >= -51)) ||
((status <= -53) && (status >= -58)) ||
(status == -64) ||
((status <= -80) && (status >= -83)) ||
(status == -130) || (status == -140) ||
(status == -150)) {
c = 'B';
}
if (c == 0)
return -EINVAL;
buf[0] = (status < 0) ? '-' : c;
buf[1] = c;
return 0;
}
void show_boot_progress(int status)
{
char buf[2];
if (a4m072_status2code(status, buf) < 0)
return;
display_putc(buf[0]);
display_putc(buf[1]);
display_set(DISPLAY_HOME);
display_out_pos = 0; /* reset output position */
/* we want to flush status 15 now */
if (status == BOOTSTAGE_ID_RUN_OS)
display_flush();
}
#endif
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