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/*
* (C) Copyright 2008
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* 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 <command.h>
#include <i2c.h>
#include <asm/io.h>
/*
* NOR and NAND boot options change bytes 5, 6, 8, 9, 11. The
* values are independent of the rest of the clock settings.
*/
#define NAND_COMPATIBLE 0x01
#define NOR_COMPATIBLE 0x02
#define I2C_EEPROM_ADDR 0x52
static char *config_labels[] = {
"CPU: 600 PLB: 200 OPB: 100 EBC: 100",
"CPU: 800 PLB: 200 OPB: 100 EBC: 100",
NULL
};
static u8 boot_configs[][17] = {
{
(NAND_COMPATIBLE | NOR_COMPATIBLE),
0x86, 0x80, 0xce, 0x1f, 0x79, 0x80, 0x00, 0xa0, 0x40, 0x08,
0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
},
{
(NAND_COMPATIBLE | NOR_COMPATIBLE),
0x86, 0x80, 0xba, 0x14, 0x99, 0x80, 0x00, 0xa0, 0x40, 0x08,
0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
},
{
0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
}
};
/*
* Bytes 5,6,8,9,11 change for NAND boot
*/
#if 0
/*
* Values for 512 page size NAND chips, not used anymore, just
* keep them here for reference
*/
static u8 nand_boot[] = {
0x90, 0x01, 0xa0, 0x68, 0x58
};
#else
/*
* Values for 2k page size NAND chips
*/
static u8 nand_boot[] = {
0x90, 0x01, 0xa0, 0xe8, 0x58
};
#endif
static int do_bootstrap(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
u8 *buf, b_nand;
int x, y, nbytes, selcfg;
extern char console_buffer[];
if (argc < 2) {
printf("Usage:\n%s\n", cmdtp->usage);
return 1;
}
if ((strcmp(argv[1], "nor") != 0) &&
(strcmp(argv[1], "nand") != 0)) {
printf("Unsupported boot-device - only nor|nand support\n");
return 1;
}
/* set the nand flag based on provided input */
if ((strcmp(argv[1], "nand") == 0))
b_nand = 1;
else
b_nand = 0;
printf("Available configurations: \n\n");
if (b_nand) {
for(x = 0, y = 0; boot_configs[x][0] != 0; x++) {
/* filter on nand compatible */
if (boot_configs[x][0] & NAND_COMPATIBLE) {
printf(" %d - %s\n", (y+1), config_labels[x]);
y++;
}
}
} else {
for(x = 0, y = 0; boot_configs[x][0] != 0; x++) {
/* filter on nor compatible */
if (boot_configs[x][0] & NOR_COMPATIBLE) {
printf(" %d - %s\n", (y+1), config_labels[x]);
y++;
}
}
}
do {
nbytes = readline(" Selection [1-x / quit]: ");
if (nbytes) {
if (strcmp(console_buffer, "quit") == 0)
return 0;
selcfg = simple_strtol(console_buffer, NULL, 10);
if ((selcfg < 1) || (selcfg > y))
nbytes = 0;
}
} while (nbytes == 0);
y = (selcfg - 1);
for (x = 0; boot_configs[x][0] != 0; x++) {
if (b_nand) {
if (boot_configs[x][0] & NAND_COMPATIBLE) {
if (y > 0)
y--;
else if (y < 1)
break;
}
} else {
if (boot_configs[x][0] & NOR_COMPATIBLE) {
if (y > 0)
y--;
else if (y < 1)
break;
}
}
}
buf = &boot_configs[x][1];
if (b_nand) {
buf[5] = nand_boot[0];
buf[6] = nand_boot[1];
buf[8] = nand_boot[2];
buf[9] = nand_boot[3];
buf[11] = nand_boot[4];
}
if (i2c_write(I2C_EEPROM_ADDR, 0, 1, buf, 16) != 0)
printf("Error writing to EEPROM at address 0x%x\n", I2C_EEPROM_ADDR);
udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
printf("Done\n");
printf("Please power-cycle the board for the changes to take effect\n");
return 0;
}
U_BOOT_CMD(
bootstrap, 2, 0, do_bootstrap,
"bootstrap - program the I2C bootstrap EEPROM\n",
"<nand|nor> - strap to boot from NAND or NOR flash\n"
);
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