ppc4xx: Add initial Zeus (PPC405EP) board support

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

1 files changed, 511 insertions, 0 deletions

diff --git a/board/zeus/zeus.c b/board/zeus/zeus.c
new file mode 100644
index 0000000..4ab853f
--- /dev/null
+++ b/board/zeus/zeus.c
@@ -0,0 +1,511 @@
+/*
+ * (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 <malloc.h>
+#include <environment.h>
+#include <logbuff.h>
+#include <post.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define REBOOT_MAGIC	0x07081967
+#define REBOOT_NOP	0x00000000
+#define REBOOT_DO_POST	0x00000001
+
+extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+extern env_t *env_ptr;
+extern uchar default_environment[];
+
+ulong flash_get_size(ulong base, int banknum);
+void env_crc_update(void);
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+
+static u32 start_time;
+
+int board_early_init_f(void)
+{
+	mtdcr(uicsr, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr(uicer, 0x00000000);	/* disable all ints */
+	mtdcr(uiccr, 0x00000000);
+	mtdcr(uicpr, 0xFFFF7F00);	/* set int polarities */
+	mtdcr(uictr, 0x00000000);	/* set int trigger levels */
+	mtdcr(uicsr, 0xFFFFFFFF);	/* clear all ints */
+	mtdcr(uicvcr, 0x00000001);	/* set vect base=0,INT0 highest priority */
+
+	/*
+	 * Configure CPC0_PCI to enable PerWE as output
+	 */
+	mtdcr(cpc0_pci, CPC0_PCI_SPE);
+
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	u32 pbcr;
+	int size_val = 0;
+	u32 post_magic;
+	u32 post_val;
+
+	post_magic = in_be32((void *)CFG_POST_MAGIC);
+	post_val = in_be32((void *)CFG_POST_VAL);
+	if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST)) {
+		/*
+		 * Set special bootline bootparameter to pass this POST boot
+		 * mode to Linux to reset the username/password
+		 */
+		setenv("addmisc", "setenv bootargs \\${bootargs} factory_reset=yes");
+
+		/*
+		 * Normally don't run POST tests, only when enabled
+		 * via the sw-reset button. So disable further tests
+		 * upon next bootup here.
+		 */
+		out_be32((void *)CFG_POST_VAL, REBOOT_NOP);
+	} else {
+		/*
+		 * Only run POST when initiated via the sw-reset button mechanism
+		 */
+		post_word_store(0);
+	}
+
+	/*
+	 * Get current time
+	 */
+	start_time = get_timer(0);
+
+	/*
+	 * FLASH stuff...
+	 */
+
+	/* Re-do sizing to get full correct info */
+
+	/* adjust flash start and offset */
+	mfebc(pb0cr, pbcr);
+	switch (gd->bd->bi_flashsize) {
+	case 1 << 20:
+		size_val = 0;
+		break;
+	case 2 << 20:
+		size_val = 1;
+		break;
+	case 4 << 20:
+		size_val = 2;
+		break;
+	case 8 << 20:
+		size_val = 3;
+		break;
+	case 16 << 20:
+		size_val = 4;
+		break;
+	case 32 << 20:
+		size_val = 5;
+		break;
+	case 64 << 20:
+		size_val = 6;
+		break;
+	case 128 << 20:
+		size_val = 7;
+		break;
+	}
+	pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
+	mtebc(pb0cr, pbcr);
+
+	/*
+	 * Re-check to get correct base address
+	 */
+	flash_get_size(gd->bd->bi_flashstart, 0);
+
+	/* Monitor protection ON by default */
+	(void)flash_protect(FLAG_PROTECT_SET,
+			    -CFG_MONITOR_LEN,
+			    0xffffffff,
+			    &flash_info[0]);
+
+	/* Env protection ON by default */
+	(void)flash_protect(FLAG_PROTECT_SET,
+			    CFG_ENV_ADDR_REDUND,
+			    CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1,
+			    &flash_info[0]);
+
+	return 0;
+}
+
+/*
+ * Check Board Identity:
+ */
+int checkboard(void)
+{
+	char *s = getenv("serial#");
+
+	puts("Board: Zeus-");
+
+	if (in_be32((void *)GPIO0_IR) & GPIO_VAL(CFG_GPIO_ZEUS_PE))
+		puts("PE");
+	else
+		puts("CE");
+
+	puts(" of BulletEndPoint");
+
+	if (s != NULL) {
+		puts(", serial# ");
+		puts(s);
+	}
+	putc('\n');
+
+	/* both LED's off */
+	gpio_write_bit(CFG_GPIO_LED_RED, 0);
+	gpio_write_bit(CFG_GPIO_LED_GREEN, 0);
+	udelay(10000);
+	/* and on again */
+	gpio_write_bit(CFG_GPIO_LED_RED, 1);
+	gpio_write_bit(CFG_GPIO_LED_GREEN, 1);
+
+	return (0);
+}
+
+static u32 detect_sdram_size(void)
+{
+	u32 val;
+	u32 size;
+
+	mfsdram(mem_mb0cf, val);
+	size = (4 << 20) << ((val & 0x000e0000) >> 17);
+
+	/*
+	 * Check if 2nd bank is enabled too
+	 */
+	mfsdram(mem_mb1cf, val);
+	if (val & 1)
+		size += (4 << 20) << ((val & 0x000e0000) >> 17);
+
+	return size;
+}
+
+long int initdram (int board_type)
+{
+	return detect_sdram_size();
+}
+
+#if defined(CFG_DRAM_TEST)
+int testdram(void)
+{
+	unsigned long *mem = (unsigned long *)0;
+	const unsigned long kend = (1024 / sizeof(unsigned long));
+	unsigned long k, n;
+	unsigned long msr;
+	unsigned long total_kbytes;
+
+	total_kbytes = detect_sdram_size();
+
+	msr = mfmsr();
+	mtmsr(msr & ~(MSR_EE));
+
+	for (k = 0; k < total_kbytes ;
+	     ++k, mem += (1024 / sizeof(unsigned long))) {
+		if ((k & 1023) == 0) {
+			printf("%3d MB\r", k / 1024);
+		}
+
+		memset(mem, 0xaaaaaaaa, 1024);
+		for (n = 0; n < kend; ++n) {
+			if (mem[n] != 0xaaaaaaaa) {
+				printf("SDRAM test fails at: %08x\n",
+				       (uint) & mem[n]);
+				return 1;
+			}
+		}
+
+		memset(mem, 0x55555555, 1024);
+		for (n = 0; n < kend; ++n) {
+			if (mem[n] != 0x55555555) {
+				printf("SDRAM test fails at: %08x\n",
+				       (uint) & mem[n]);
+				return 1;
+			}
+		}
+	}
+	printf("SDRAM test passes\n");
+	mtmsr(msr);
+
+	return 0;
+}
+#endif
+
+static int default_env_var(char *buf, char *var)
+{
+	char *ptr;
+	char *val;
+
+	/*
+	 * Find env variable
+	 */
+	ptr = strstr(buf + 4, var);
+	if (ptr == NULL) {
+		printf("ERROR: %s not found!\n", var);
+		return -1;
+	}
+	ptr += strlen(var) + 1;
+
+	/*
+	 * Now the ethaddr needs to be updated in the "normal"
+	 * environment storage -> redundant flash.
+	 */
+	val = ptr;
+	setenv(var, val);
+	printf("Updated %s from eeprom to %s!\n", var, val);
+
+	return 0;
+}
+
+static int restore_default(void)
+{
+	char *buf;
+	char *buf_save;
+	u32 crc;
+
+	/*
+	 * Unprotect and erase environment area
+	 */
+	flash_protect(FLAG_PROTECT_CLEAR,
+		      CFG_ENV_ADDR_REDUND,
+		      CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1,
+		      &flash_info[0]);
+
+	flash_sect_erase(CFG_ENV_ADDR_REDUND,
+			 CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1);
+
+	/*
+	 * Now restore default environment from U-Boot image
+	 * -> ipaddr, serverip...
+	 */
+	memset(env_ptr, 0, sizeof(env_t));
+	memcpy(env_ptr->data, default_environment, ENV_SIZE);
+#ifdef CFG_REDUNDAND_ENVIRONMENT
+	env_ptr->flags = 0xFF;
+#endif
+	env_crc_update();
+	gd->env_valid = 1;
+
+	/*
+	 * Read board specific values from I2C EEPROM
+	 * and set env variables accordingly
+	 * -> ethaddr, eth1addr, serial#
+	 */
+	buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
+	if (eeprom_read(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
+			(u8 *)buf, FACTORY_RESET_ENV_SIZE)) {
+		puts("\nError reading EEPROM!\n");
+	} else {
+		crc = crc32(0, (u8 *)(buf + 4), FACTORY_RESET_ENV_SIZE - 4);
+		if (crc != *(u32 *)buf) {
+			printf("ERROR: crc mismatch %08lx %08lx\n", crc, *(u32 *)buf);
+			return -1;
+		}
+
+		default_env_var(buf, "ethaddr");
+		buf += 8 + 18;
+		default_env_var(buf, "eth1addr");
+		buf += 9 + 18;
+		default_env_var(buf, "serial#");
+	}
+
+	/*
+	 * Finally save updated env variables back to flash
+	 */
+	saveenv();
+
+	free(buf_save);
+
+	return 0;
+}
+
+int do_set_default(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	char *buf;
+	char *buf_save;
+	char str[32];
+	u32 crc;
+	char var[32];
+
+	if (argc < 4) {
+		puts("ERROR!\n");
+		return -1;
+	}
+
+	buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
+	memset(buf, 0, FACTORY_RESET_ENV_SIZE);
+
+	strcpy(var, "ethaddr");
+	printf("Setting %s to %s\n", var, argv[1]);
+	sprintf(str, "%s=%s", var, argv[1]);
+	strcpy(buf + 4, str);
+	buf += strlen(str) + 1;
+
+	strcpy(var, "eth1addr");
+	printf("Setting %s to %s\n", var, argv[2]);
+	sprintf(str, "%s=%s", var, argv[2]);
+	strcpy(buf + 4, str);
+	buf += strlen(str) + 1;
+
+	strcpy(var, "serial#");
+	printf("Setting %s to %s\n", var, argv[3]);
+	sprintf(str, "%s=%s", var, argv[3]);
+	strcpy(buf + 4, str);
+
+	crc = crc32(0, (u8 *)(buf_save + 4), FACTORY_RESET_ENV_SIZE - 4);
+	*(u32 *)buf_save = crc;
+
+	if (eeprom_write(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
+			 (u8 *)buf_save, FACTORY_RESET_ENV_SIZE)) {
+		puts("\nError writing EEPROM!\n");
+		return -1;
+	}
+
+	free(buf_save);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	setdef,	4,	1,	do_set_default,
+	"setdef  - write board-specific values to EEPROM (ethaddr...)\n",
+	"ethaddr eth1addr serial#\n    - write board-specific values to EEPROM\n"
+	);
+
+static inline int sw_reset_pressed(void)
+{
+	return !(in_be32((void *)GPIO0_IR) & GPIO_VAL(CFG_GPIO_SW_RESET));
+}
+
+int do_chkreset(cmd_tbl_t* cmdtp, int flag, int argc, char* argv[])
+{
+	int delta;
+	int count = 0;
+	int post = 0;
+	int factory_reset = 0;
+
+	if (!sw_reset_pressed()) {
+		printf("SW-Reset already high (Button released)\n");
+		printf("-> No action taken!\n");
+		return 0;
+	}
+
+	printf("Waiting for SW-Reset button to be released.");
+
+	while (1) {
+		delta = get_timer(start_time);
+		if (!sw_reset_pressed())
+			break;
+
+		if ((delta > CFG_TIME_POST) && !post) {
+			printf("\nWhen released now, POST tests will be started.");
+			gpio_write_bit(CFG_GPIO_LED_GREEN, 0);
+			post = 1;
+		}
+
+		if ((delta > CFG_TIME_FACTORY_RESET) && !factory_reset) {
+			printf("\nWhen released now, factory default values"
+			       " will be restored.");
+			gpio_write_bit(CFG_GPIO_LED_RED, 0);
+			factory_reset = 1;
+		}
+
+		udelay(1000);
+		if (!(count++ % 1000))
+			printf(".");
+	}
+
+
+	printf("\nSW-Reset Button released after %d milli-seconds!\n", delta);
+
+	if (delta > CFG_TIME_FACTORY_RESET) {
+		printf("Starting factory reset value restoration...\n");
+
+		/*
+		 * Restore default setting
+		 */
+		restore_default();
+
+		/*
+		 * Reset the board for default to become valid
+		 */
+		do_reset(NULL, 0, 0, NULL);
+
+		return 0;
+	}
+
+	if (delta > CFG_TIME_POST) {
+		printf("Starting POST configuration...\n");
+
+		/*
+		 * Enable POST upon next bootup
+		 */
+		out_be32((void *)CFG_POST_MAGIC, REBOOT_MAGIC);
+		out_be32((void *)CFG_POST_VAL, REBOOT_DO_POST);
+		post_bootmode_init();
+
+		/*
+		 * Reset the logbuffer for a clean start
+		 */
+		logbuff_reset();
+
+		do_reset(NULL, 0, 0, NULL);
+
+		return 0;
+	}
+
+	return 0;
+}
+
+U_BOOT_CMD (
+	chkreset, 1, 1, do_chkreset,
+	"chkreset- Check for status of SW-reset button and act accordingly\n",
+	NULL
+);
+
+#if defined(CONFIG_POST)
+/*
+ * Returns 1 if keys pressed to start the power-on long-running tests
+ * Called from board_init_f().
+ */
+int post_hotkeys_pressed(void)
+{
+	u32 post_magic;
+	u32 post_val;
+
+	post_magic = in_be32((void *)CFG_POST_MAGIC);
+	post_val = in_be32((void *)CFG_POST_VAL);
+
+	if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST))
+		return 1;
+	else
+		return 0;
+}
+#endif /* CONFIG_POST */