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u-boot-brain/board/kup/kup4k/kup4k.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 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* Klaus Heydeck, Kieback & Peter GmbH & Co KG, heydeck@kieback-peter.de
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <libfdt.h>
#include <mpc8xx.h>
#include <hwconfig.h>
#include <i2c.h>
#include "../common/kup.h"
#include <asm/io.h>
static unsigned char swapbyte(unsigned char c);
static int read_diag(void);
DECLARE_GLOBAL_DATA_PTR;
/* ----------------------------------------------------------------------- */
#define _NOT_USED_ 0xFFFFFFFF
const uint sdram_table[] = {
/*
* Single Read. (Offset 0 in UPMA RAM)
*/
0x1F07FC04, 0xEEAEFC04, 0x11ADFC04, 0xEFBBBC00,
0x1FF77C47, /* last */
/*
* SDRAM Initialization (offset 5 in UPMA RAM)
*
* This is no UPM entry point. The following definition uses
* the remaining space to establish an initialization
* sequence, which is executed by a RUN command.
*
*/
0x1FF77C35, 0xEFEABC34, 0x1FB57C35, /* last */
/*
* Burst Read. (Offset 8 in UPMA RAM)
*/
0x1F07FC04, 0xEEAEFC04, 0x10ADFC04, 0xF0AFFC00,
0xF0AFFC00, 0xF1AFFC00, 0xEFBBBC00, 0x1FF77C47, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Single Write. (Offset 18 in UPMA RAM)
*/
0x1F27FC04, 0xEEAEBC00, 0x01B93C04, 0x1FF77C47, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Write. (Offset 20 in UPMA RAM)
*/
0x1F07FC04, 0xEEAEBC00, 0x10AD7C00, 0xF0AFFC00,
0xF0AFFC00, 0xE1BBBC04, 0x1FF77C47, /* last */
_NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Refresh (Offset 30 in UPMA RAM)
*/
0x1FF5FC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
0xFFFFFC84, 0xFFFFFC07, /* last */
_NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Exception. (Offset 3c in UPMA RAM)
*/
0x7FFFFC07, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_,
};
/* ----------------------------------------------------------------------- */
/*
* Check Board Identity:
*/
int checkboard(void)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
uchar rev,mod,tmp,pcf,ak_rev,ak_mod;
/*
* Init ChipSelect #4 (CAN + HW-Latch)
*/
out_be32(&immap->im_memctl.memc_or4, CONFIG_SYS_OR4);
out_be32(&immap->im_memctl.memc_br4, CONFIG_SYS_BR4);
/*
* Init ChipSelect #5 (S1D13768)
*/
out_be32(&immap->im_memctl.memc_or5, CONFIG_SYS_OR5);
out_be32(&immap->im_memctl.memc_br5, CONFIG_SYS_BR5);
tmp = swapbyte(in_8((unsigned char*) LATCH_ADDR));
rev = (tmp & 0xF8) >> 3;
mod = (tmp & 0x07);
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
if (read_diag())
gd->flags &= ~GD_FLG_SILENT;
printf("Board: KUP4K Rev %d.%d AK:",rev,mod);
/*
* TI Application report: Before using the IO as an input,
* a high must be written to the IO first
*/
pcf = 0xFF;
i2c_write(0x21, 0, 0 , &pcf, 1);
if (i2c_read(0x21, 0, 0, &pcf, 1)) {
puts("n/a\n");
} else {
ak_rev = (pcf & 0xF8) >> 3;
ak_mod = (pcf & 0x07);
printf("%d.%d\n", ak_rev, ak_mod);
}
return 0;
}
/* ----------------------------------------------------------------------- */
phys_size_t initdram(int board_type)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
long int size = 0;
uchar *latch, rev, tmp;
/*
* Init ChipSelect #4 (CAN + HW-Latch) to determine Hardware Revision
* Rev 1..6 -> 48 MB RAM; Rev >= 7 -> 96 MB
*/
out_be32(&immap->im_memctl.memc_or4, CONFIG_SYS_OR4);
out_be32(&immap->im_memctl.memc_br4, CONFIG_SYS_BR4);
latch = (uchar *)0x90000200;
tmp = swapbyte(*latch);
rev = (tmp & 0xF8) >> 3;
upmconfig(UPMA, (uint *) sdram_table,
sizeof (sdram_table) / sizeof (uint));
out_be16(&memctl->memc_mptpr, CONFIG_SYS_MPTPR);
out_be32(&memctl->memc_mar, 0x00000088);
/* no refresh yet */
if(rev >= 7) {
out_be32(&memctl->memc_mamr,
CONFIG_SYS_MAMR_9COL & (~(MAMR_PTAE)));
} else {
out_be32(&memctl->memc_mamr,
CONFIG_SYS_MAMR_8COL & (~(MAMR_PTAE)));
}
udelay(200);
/* perform SDRAM initializsation sequence */
/* SDRAM bank 0 */
out_be32(&memctl->memc_mcr, 0x80002105);
udelay(1);
out_be32(&memctl->memc_mcr, 0x80002830); /* execute twice */
udelay(1);
out_be32(&memctl->memc_mcr, 0x80002106); /* RUN MRS Pattern from loc 6 */
udelay(1);
/* SDRAM bank 1 */
out_be32(&memctl->memc_mcr, 0x80004105);
udelay(1);
out_be32(&memctl->memc_mcr, 0x80004830); /* execute twice */
udelay(1);
out_be32(&memctl->memc_mcr, 0x80004106); /* RUN MRS Pattern from loc 6 */
udelay(1);
/* SDRAM bank 2 */
out_be32(&memctl->memc_mcr, 0x80006105);
udelay(1);
out_be32(&memctl->memc_mcr, 0x80006830); /* execute twice */
udelay(1);
out_be32(&memctl->memc_mcr, 0x80006106); /* RUN MRS Pattern from loc 6 */
udelay(1);
setbits_be32(&memctl->memc_mamr, MAMR_PTAE); /* enable refresh */
udelay(1000);
out_be16(&memctl->memc_mptpr, CONFIG_SYS_MPTPR);
udelay(1000);
if(rev >= 7) {
size = 32 * 3 * 1024 * 1024;
out_be32(&memctl->memc_or1, CONFIG_SYS_OR1_9COL);
out_be32(&memctl->memc_br1, CONFIG_SYS_BR1_9COL);
out_be32(&memctl->memc_or2, CONFIG_SYS_OR2_9COL);
out_be32(&memctl->memc_br2, CONFIG_SYS_BR2_9COL);
out_be32(&memctl->memc_or3, CONFIG_SYS_OR3_9COL);
out_be32(&memctl->memc_br3, CONFIG_SYS_BR3_9COL);
} else {
size = 16 * 3 * 1024 * 1024;
out_be32(&memctl->memc_or1, CONFIG_SYS_OR1_8COL);
out_be32(&memctl->memc_br1, CONFIG_SYS_BR1_8COL);
out_be32(&memctl->memc_or2, CONFIG_SYS_OR2_8COL);
out_be32(&memctl->memc_br2, CONFIG_SYS_BR2_8COL);
out_be32(&memctl->memc_or3, CONFIG_SYS_OR3_8COL);
out_be32(&memctl->memc_br3, CONFIG_SYS_BR3_8COL);
}
return (size);
}
/* ----------------------------------------------------------------------- */
int misc_init_r(void)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
#ifdef CONFIG_IDE_LED
/* Configure PA8 as output port */
setbits_be16(&immap->im_ioport.iop_padir, PA_8);
setbits_be16(&immap->im_ioport.iop_paodr, PA_8);
clrbits_be16(&immap->im_ioport.iop_papar, PA_8);
setbits_be16(&immap->im_ioport.iop_padat, PA_8); /* turn it off */
#endif
load_sernum_ethaddr();
setenv("hw","4k");
poweron_key();
return (0);
}
static int read_diag(void)
{
int diag;
immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
clrbits_be16(&immr->im_ioport.iop_pcdir, PC_4); /* input */
clrbits_be16(&immr->im_ioport.iop_pcpar, PC_4); /* gpio */
setbits_be16(&immr->im_ioport.iop_pcdir, PC_5); /* output */
clrbits_be16(&immr->im_ioport.iop_pcpar, PC_4); /* gpio */
setbits_be16(&immr->im_ioport.iop_pcdat, PC_5); /* 1 */
udelay(500);
if (in_be16(&immr->im_ioport.iop_pcdat) & PC_4) {
clrbits_be16(&immr->im_ioport.iop_pcdat, PC_5);/* 0 */
udelay(500);
if(in_be16(&immr->im_ioport.iop_pcdat) & PC_4)
diag = 0;
else
diag = 1;
} else {
diag = 0;
}
clrbits_be16(&immr->im_ioport.iop_pcdir, PC_5); /* input */
return (diag);
}
static unsigned char swapbyte(unsigned char c)
{
unsigned char result = 0;
int i = 0;
for(i = 0; i < 8; ++i) {
result = result << 1;
result |= (c & 1);
c = c >> 1;
}
return result;
}
/*
* Device Tree Support
*/
#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
int ft_board_setup(void *blob, bd_t *bd)
{
ft_cpu_setup(blob, bd);
return 0;
}
#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */
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