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u-boot/board/esd/plu405/plu405.c
Matthias Fuchs fceebb45a0 ppc4xx: Enable auto RS485 mode on PLU405 boards 
This patch turns on the auto RS485 mode in the 2nd external
uart on PLU405 boards. This is a special mode of the used
Exar XR16C2850 uart. Because these boards only have a 485 physical
layer connected it's a good idea to turn it on by default.

Signed-off-by: Matthias Fuchs <mf@esd.eu>
Signed-off-by: Stefan Roese <sr@denx.de>
2009-01-14 11:17:52 +01:00

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/*
* (C) Copyright 2001-2003
* Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.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 <asm/io.h>
#include <command.h>
#include <malloc.h>
#if 0
#define FPGA_DEBUG
#endif
DECLARE_GLOBAL_DATA_PTR;
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
extern void lxt971_no_sleep(void);
/* fpga configuration data - gzip compressed and generated by bin2c */
const unsigned char fpgadata[] =
{
#include "fpgadata.c"
};
/*
* include common fpga code (for esd boards)
*/
#include "../common/fpga.c"
/*
* include common auto-update code (for esd boards)
*/
#include "../common/auto_update.h"
au_image_t au_image[] = {
{"plu405/preinst.img", 0, -1, AU_SCRIPT},
{"plu405/u-boot.img", 0xfffc0000, 0x00040000, AU_FIRMWARE},
{"plu405/pImage_${bd_type}", 0x00000000, 0x00100000, AU_NAND},
{"plu405/pImage.initrd", 0x00100000, 0x00200000, AU_NAND},
{"plu405/yaffsmt2.img", 0x00300000, 0x01c00000, AU_NAND},
{"plu405/postinst.img", 0, 0, AU_SCRIPT},
};
int N_AU_IMAGES = (sizeof(au_image) / sizeof(au_image[0]));
/* Prototypes */
int gunzip(void *, int, unsigned char *, unsigned long *);
int board_early_init_f (void)
{
/*
* IRQ 0-15 405GP internally generated; active high; level sensitive
* IRQ 16 405GP internally generated; active low; level sensitive
* IRQ 17-24 RESERVED
* IRQ 25 (EXT IRQ 0) CAN0; active low; level sensitive
* IRQ 26 (EXT IRQ 1) SER0 ; active low; level sensitive
* IRQ 27 (EXT IRQ 2) SER1; active low; level sensitive
* IRQ 28 (EXT IRQ 3) FPGA 0; active low; level sensitive
* IRQ 29 (EXT IRQ 4) FPGA 1; active low; level sensitive
* IRQ 30 (EXT IRQ 5) PCI INTA; active low; level sensitive
* IRQ 31 (EXT IRQ 6) COMPACT FLASH; active high; level sensitive
*/
mtdcr(uicsr, 0xFFFFFFFF); /* clear all ints */
mtdcr(uicer, 0x00000000); /* disable all ints */
mtdcr(uiccr, 0x00000000); /* set all to be non-critical*/
mtdcr(uicpr, 0xFFFFFF99); /* set int polarities */
mtdcr(uictr, 0x10000000); /* set int trigger levels */
mtdcr(uicvcr, 0x00000001); /* set vect base=0,INT0 highest prio */
mtdcr(uicsr, 0xFFFFFFFF); /* clear all ints */
/*
* EBC Configuration Register: set ready timeout to
* 512 ebc-clks -> ca. 15 us
*/
mtebc (epcr, 0xa8400000); /* ebc always driven */
return 0;
}
int misc_init_r (void)
{
unsigned char *duart0_mcr = (unsigned char *)((ulong)DUART0_BA + 4);
unsigned char *duart1_mcr = (unsigned char *)((ulong)DUART1_BA + 4);
unsigned char *dst;
unsigned char fctr;
ulong len = sizeof(fpgadata);
int status;
int index;
int i;
/* adjust flash start and offset */
gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
gd->bd->bi_flashoffset = 0;
dst = malloc(CONFIG_SYS_FPGA_MAX_SIZE);
if (gunzip (dst, CONFIG_SYS_FPGA_MAX_SIZE, (uchar *)fpgadata, &len) != 0) {
printf ("GUNZIP ERROR - must RESET board to recover\n");
do_reset (NULL, 0, 0, NULL);
}
status = fpga_boot(dst, len);
if (status != 0) {
printf("\nFPGA: Booting failed ");
switch (status) {
case ERROR_FPGA_PRG_INIT_LOW:
printf("(Timeout: INIT not low "
"after asserting PROGRAM*)\n");
break;
case ERROR_FPGA_PRG_INIT_HIGH:
printf("(Timeout: INIT not high "
"after deasserting PROGRAM*)\n");
break;
case ERROR_FPGA_PRG_DONE:
printf("(Timeout: DONE not high "
"after programming FPGA)\n");
break;
}
/* display infos on fpgaimage */
index = 15;
for (i=0; i<4; i++) {
len = dst[index];
printf("FPGA: %s\n", &(dst[index+1]));
index += len+3;
}
putc ('\n');
/* delayed reboot */
for (i=20; i>0; i--) {
printf("Rebooting in %2d seconds \r",i);
for (index=0;index<1000;index++)
udelay(1000);
}
putc ('\n');
do_reset(NULL, 0, 0, NULL);
}
puts("FPGA: ");
/* display infos on fpgaimage */
index = 15;
for (i=0; i<4; i++) {
len = dst[index];
printf("%s ", &(dst[index+1]));
index += len+3;
}
putc ('\n');
free(dst);
/*
* Reset FPGA via FPGA_DATA pin
*/
SET_FPGA(FPGA_PRG | FPGA_CLK);
udelay(1000); /* wait 1ms */
SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);
udelay(1000); /* wait 1ms */
/*
* Reset external DUARTs
*/
out_be32((void*)GPIO0_OR, in_be32((void*)GPIO0_OR) | CONFIG_SYS_DUART_RST);
udelay(10);
out_be32((void*)GPIO0_OR, in_be32((void*)GPIO0_OR) & ~CONFIG_SYS_DUART_RST);
udelay(1000);
/*
* Set NAND-FLASH GPIO signals to default
*/
out_be32((void*)GPIO0_OR,
in_be32((void*)GPIO0_OR) & ~(CONFIG_SYS_NAND_CLE | CONFIG_SYS_NAND_ALE));
out_be32((void*)GPIO0_OR, in_be32((void*)GPIO0_OR) | CONFIG_SYS_NAND_CE);
/*
* Setup EEPROM write protection
*/
out_be32((void*)GPIO0_OR, in_be32((void*)GPIO0_OR) | CONFIG_SYS_EEPROM_WP);
out_be32((void*)GPIO0_TCR, in_be32((void*)GPIO0_TCR) | CONFIG_SYS_EEPROM_WP);
/*
* Enable interrupts in exar duart mcr[3]
*/
out_8(duart0_mcr, 0x08);
out_8(duart1_mcr, 0x08);
/*
* Enable auto RS485 mode in 2nd external uart
*/
out_8((void *)DUART1_BA + 3, 0xbf); /* write LCR */
fctr = in_8((void *)DUART1_BA + 1); /* read FCTR */
fctr |= 0x08; /* enable RS485 mode */
out_8((void *)DUART1_BA + 1, fctr); /* write FCTR */
out_8((void *)DUART1_BA + 3, 0); /* write LCR */
return (0);
}
/*
* Check Board Identity:
*/
int checkboard (void)
{
char str[64];
int i = getenv_r ("serial#", str, sizeof(str));
puts ("Board: ");
if (i == -1) {
puts ("### No HW ID - assuming PLU405");
} else {
puts(str);
}
putc ('\n');
return 0;
}
#ifdef CONFIG_IDE_RESET
void ide_set_reset(int on)
{
volatile unsigned short *fpga_mode =
(unsigned short *)((ulong)CONFIG_SYS_FPGA_BASE_ADDR + CONFIG_SYS_FPGA_CTRL);
/*
* Assert or deassert CompactFlash Reset Pin
*/
if (on) { /* assert RESET */
*fpga_mode &= ~(CONFIG_SYS_FPGA_CTRL_CF_RESET);
} else { /* release RESET */
*fpga_mode |= CONFIG_SYS_FPGA_CTRL_CF_RESET;
}
}
#endif /* CONFIG_IDE_RESET */
void reset_phy(void)
{
#ifdef CONFIG_LXT971_NO_SLEEP
/*
* Disable sleep mode in LXT971
*/
lxt971_no_sleep();
#endif
}
#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, clear bit GPIO0. */
out_be32((void*)GPIO0_OR,
in_be32((void*)GPIO0_OR) & ~CONFIG_SYS_EEPROM_WP);
state = 0;
break;
case 0:
/* Disable write access, set bit GPIO0. */
out_be32((void*)GPIO0_OR,
in_be32((void*)GPIO0_OR) | CONFIG_SYS_EEPROM_WP);
state = 0;
break;
default:
/* Read current status back. */
state = (0 == (in_be32((void*)GPIO0_OR) &
CONFIG_SYS_EEPROM_WP));
break;
}
}
return state;
}
int do_eep_wren (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int query = argc == 1;
int state = 0;
if (query) {
/* Query write access state. */
state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, -1);
if (state < 0) {
puts ("Query of write access state failed.\n");
} else {
printf ("Write access for device 0x%0x is %sabled.\n",
CONFIG_SYS_I2C_EEPROM_ADDR, state ? "en" : "dis");
state = 0;
}
} else {
if ('0' == argv[1][0]) {
/* Disable write access. */
state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, 0);
} else {
/* Enable write access. */
state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, 1);
}
if (state < 0) {
puts ("Setup of write access state failed.\n");
}
}
return state;
}
U_BOOT_CMD(eepwren, 2, 0, do_eep_wren,
"eepwren - Enable / disable / query EEPROM write access\n",
NULL);
#endif /* #if defined(CONFIG_SYS_EEPROM_WREN) */
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