Add "chip_config" command for PPC4xx bootstrap configuration

This patch adds a generic command for programming I2C bootstrap
eeproms on PPC4xx. An implementation for Canyonlands board is
included.

The command name is intentionally chosen not to be PPC4xx specific.
This way other CPU's/SoC's can implement a similar command under
the same name, perhaps with a different syntax.

Usage on Canyonlands:

=> chip_config
Available configurations (I2C address 0x52):
600-nor          - NOR  CPU: 600 PLB: 200 OPB: 100 EBC: 100
600-nand         - NAND CPU: 600 PLB: 200 OPB: 100 EBC: 100
800-nor          - NOR  CPU: 800 PLB: 200 OPB: 100 EBC: 100
800-nand         - NAND CPU: 800 PLB: 200 OPB: 100 EBC: 100
1000-nor         - NOR  CPU:1000 PLB: 200 OPB: 100 EBC: 100
1000-nand        - NAND CPU:1000 PLB: 200 OPB: 100 EBC: 100
1066-nor         - NOR  CPU:1066 PLB: 266 OPB:  88 EBC:  88 ***
1066-nand        - NAND CPU:1066 PLB: 266 OPB:  88 EBC:  88
=> chip_config 600-nor
Using configuration:
600-nor          - NOR  CPU: 600 PLB: 200 OPB: 100 EBC: 100
done (dump via 'i2c md 52 0.1 10')
Reset the board for the changes to take effect

Other 4xx boards will be migrated to use this command soon
as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Acked-by: Matthias Fuchs <matthias.fuchs@esd.eu>

2 files changed, 145 insertions, 0 deletions

diff --git a/cpu/ppc4xx/Makefile b/cpu/ppc4xx/Makefile
index 6f52dfd..2050b17 100644
--- a/cpu/ppc4xx/Makefile
+++ b/cpu/ppc4xx/Makefile
@@ -41,6 +41,9 @@ endif
 COBJS	+= 4xx_pci.o
 COBJS	+= 4xx_pcie.o
 COBJS	+= bedbug_405.o
+ifdef CONFIG_CMD_CHIP_CONFIG
+COBJS	+= cmd_chip_config.o
+endif
 COBJS	+= commproc.o
 COBJS	+= cpu.o
 COBJS	+= cpu_init.o
diff --git a/cpu/ppc4xx/cmd_chip_config.c b/cpu/ppc4xx/cmd_chip_config.c
new file mode 100644
index 0000000..d360d5b
--- /dev/null
+++ b/cpu/ppc4xx/cmd_chip_config.c
@@ -0,0 +1,142 @@
+/*
+ * (C) Copyright 2008-2009
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * (C) Copyright 2009
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.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/ppc4xx_config.h>
+#include <asm/io.h>
+
+static void print_configs(int cur_config_nr)
+{
+	int i;
+
+	for (i = 0; i < ppc4xx_config_count; i++) {
+		printf("%-16s - %s", ppc4xx_config_val[i].label,
+		       ppc4xx_config_val[i].description);
+		if (i == cur_config_nr)
+			printf(" ***");
+		printf("\n");
+	}
+
+}
+
+static int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int i;
+	int ret;
+	int cur_config_nr = -1;
+	u8 cur_config[CONFIG_4xx_CONFIG_BLOCKSIZE];
+
+#ifdef CONFIG_CMD_EEPROM
+	ret = eeprom_read(CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR,
+			  CONFIG_4xx_CONFIG_I2C_EEPROM_OFFSET,
+			  cur_config, CONFIG_4xx_CONFIG_BLOCKSIZE);
+#else
+	ret = i2c_read(CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR,
+		       CONFIG_4xx_CONFIG_I2C_EEPROM_OFFSET,
+		       1, cur_config, CONFIG_4xx_CONFIG_BLOCKSIZE);
+#endif
+	if (ret) {
+		printf("Error reading EEPROM at addr 0x%x\n",
+		       CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR);
+		return -1;
+	}
+
+	/*
+	 * Search the current configuration
+	 */
+	for (i = 0; i < ppc4xx_config_count; i++) {
+		if (memcmp(cur_config, ppc4xx_config_val[i].val,
+			   CONFIG_4xx_CONFIG_BLOCKSIZE) == 0)
+			cur_config_nr = i;
+	}
+
+	if (cur_config_nr == -1) {
+		printf("Warning: The I2C bootstrap values don't match any"
+		       " of the available options!\n");
+		printf("I2C bootstrap EEPROM values are (I2C address 0x%02x):\n",
+			CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR);
+		for (i = 0; i < CONFIG_4xx_CONFIG_BLOCKSIZE; i++) {
+			printf("%02x ", cur_config[i]);
+		}
+		printf("\n");
+	}
+
+	if (argc < 2) {
+		printf("Available configurations (I2C address 0x%02x):\n",
+		       CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR);
+		print_configs(cur_config_nr);
+		return 0;
+	}
+
+	for (i = 0; i < ppc4xx_config_count; i++) {
+		/*
+		 * Search for configuration name/label
+		 */
+		if (strcmp(argv[1], ppc4xx_config_val[i].label) == 0) {
+			printf("Using configuration:\n%-16s - %s\n",
+			       ppc4xx_config_val[i].label,
+			       ppc4xx_config_val[i].description);
+
+#ifdef CONFIG_CMD_EEPROM
+			ret = eeprom_write(CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR,
+					   CONFIG_4xx_CONFIG_I2C_EEPROM_OFFSET,
+					   ppc4xx_config_val[i].val,
+					   CONFIG_4xx_CONFIG_BLOCKSIZE);
+#else
+			ret = i2c_write(CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR,
+					CONFIG_4xx_CONFIG_I2C_EEPROM_OFFSET,
+					1, ppc4xx_config_val[i].val,
+					CONFIG_4xx_CONFIG_BLOCKSIZE);
+#endif
+			udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
+			if (ret) {
+				printf("Error updating EEPROM at addr 0x%x\n",
+				       CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR);
+				return -1;
+			}
+
+			printf("done (dump via 'i2c md %x 0.1 %x')\n",
+			       CONFIG_4xx_CONFIG_I2C_EEPROM_ADDR,
+			       CONFIG_4xx_CONFIG_BLOCKSIZE);
+			printf("Reset the board for the changes to"
+			       " take effect\n");
+			return 0;
+		}
+	}
+
+	printf("Configuration %s not found!\n", argv[1]);
+	print_configs(cur_config_nr);
+	return -1;
+}
+
+U_BOOT_CMD(
+	chip_config,	2,	0,	do_chip_config,
+	"program the I2C bootstrap EEPROM",
+	"[config-label]"
+);