ppc4xx: Add bootstrap command for AMCC Sequoia (440EPx) eval board

This patch adds a board command to configure the I2C bootstrap EEPROM
values. Right now 533 and 667MHz are supported for booting either via NOR
or NAND FLASH. Here the usage:

=> bootstrap 533 nor        ;to configure the board for 533MHz NOR booting
=> bootstrap 667 nand       ;to configure the board for 667MHz NNAND booting

Signed-off-by: Stefan Roese <sr@denx.de>

board/amcc/sequoia/Makefile

@@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	= $(BOARD).o sdram.o
+COBJS	= $(BOARD).o cmd_sequoia.o sdram.o
 SOBJS	= init.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)

board/amcc/sequoia/cmd_sequoia.c

@@ -0,0 +1,111 @@
+/*
+ * (C) Copyright 2007
+ * 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>
+
+static u8 boot_533_nor[] = {
+	0x87, 0x78, 0x82, 0x52, 0x09, 0x57, 0xa0, 0x30,
+	0x40, 0x08, 0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
+};
+
+static u8 boot_533_nand[] = {
+	0x87, 0x78, 0x82, 0x52, 0x09, 0x57, 0xd0, 0x10,
+	0xa0, 0x68, 0x23, 0x58, 0x0d, 0x05, 0x00, 0x00
+};
+
+static u8 boot_667_nor[] = {
+	0x87, 0x78, 0xa2, 0x52, 0x09, 0xd7, 0xa0, 0x30,
+	0x40, 0x08, 0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
+};
+
+static u8 boot_667_nand[] = {
+	0x87, 0x78, 0xa2, 0x52, 0x09, 0xd7, 0xd0, 0x10,
+	0xa0, 0x68, 0x23, 0x58, 0x0d, 0x05, 0x00, 0x00
+};
+
+static int do_bootstrap(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	u8 chip;
+	u8 *buf;
+	int cpu_freq;
+
+	if (argc < 3) {
+		printf("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	cpu_freq = simple_strtol(argv[1], NULL, 10);
+	if (!((cpu_freq == 533) || (cpu_freq == 667))) {
+		printf("Unsupported cpu-frequency - only 533 and 667 supported\n");
+		return 1;
+	}
+
+	/* use 0x52 as I2C EEPROM address for now */
+	chip = 0x52;
+
+	if ((strcmp(argv[2], "nor") != 0) &&
+	    (strcmp(argv[2], "nand") != 0)) {
+		printf("Unsupported boot-device - only nor|nand support\n");
+		return 1;
+	}
+
+	if (strcmp(argv[2], "nand") == 0) {
+		switch (cpu_freq) {
+		default:
+		case 533:
+			buf = boot_533_nand;
+			break;
+		case 667:
+			buf = boot_667_nand;
+			break;
+		}
+	} else {
+		switch (cpu_freq) {
+		default:
+		case 533:
+			buf = boot_533_nor;
+			break;
+		case 667:
+			buf = boot_667_nor;
+			break;
+		}
+	}
+
+	if (i2c_write(chip, 0, 1, buf, 16) != 0)
+		printf("Error writing to EEPROM at address 0x%x\n", chip);
+	udelay(CFG_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,	3,	0,	do_bootstrap,
+	"bootstrap - program the I2C bootstrap EEPROM\n",
+	"<cpu-freq> <nor|nand> - program the I2C bootstrap EEPROM\n"
+	);