Add preliminary RouterBoard RB1xx support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6839 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 186 insertions, 0 deletions

diff --git a/target/linux/rb1xx-2.6/files/arch/mips/adm5120/adm5120_info.c b/target/linux/rb1xx-2.6/files/arch/mips/adm5120/adm5120_info.c
new file mode 100644
index 000000000..18e267479
--- /dev/null
+++ b/target/linux/rb1xx-2.6/files/arch/mips/adm5120/adm5120_info.c
@@ -0,0 +1,186 @@
+/*
+ * $Id$
+ *
+ * Copyright (C) 2007 OpenWrt.org
+ * Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
+ *
+ * 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.
+ */
+
+#include <linux/types.h>
+#include <linux/autoconf.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+
+#include <adm5120_info.h>
+#include <adm5120_defs.h>
+#include <adm5120_switch.h>
+#include <myloader.h>
+
+/* boot loaders specific definitions */
+#define CFE_EPTSEAL	0x43464531 /* CFE1 is the magic number to recognize CFE from other bootloaders */
+
+struct adm5120_info adm5120_info = {
+	.cpu_speed		= CPU_SPEED_175,
+	.cpu_package		= CPU_PACKAGE_PQFP,
+	.boot_loader		= BOOT_LOADER_UNKNOWN,
+	.board_type		= BOARD_TYPE_UNKNOWN
+};
+
+static char *boot_loader_names[BOOT_LOADER_LAST+1] = {
+	[BOOT_LOADER_UNKNOWN]	= "Unknown",
+	[BOOT_LOADER_CFE]	= "CFE",
+	[BOOT_LOADER_UBOOT]	= "U-Boot",
+	[BOOT_LOADER_MYLOADER]	= "MyLoader"
+};
+
+/*
+ * CPU settings detection
+ */
+#define CODE_GET_PC(c)		((c) & CODE_PC_MASK)
+#define CODE_GET_REV(c)		(((c) >> CODE_REV_SHIFT) & CODE_REV_MASK)
+#define CODE_GET_PK(c)		(((c) >> CODE_PK_SHIFT) & CODE_PK_MASK)
+#define CODE_GET_CLKS(c)	(((c) >> CODE_CLKS_SHIFT) & CODE_CLKS_MASK)
+#define CODE_GET_NAB(c)		(((c) & CODE_NAB) != 0)
+
+static void __init detect_cpu_info(void)
+{
+	uint32_t *reg;
+	uint32_t code;
+	uint32_t clks;
+
+	reg = (uint32_t *)KSEG1ADDR(ADM5120_SWITCH_BASE+SWITCH_REG_CODE);
+	code = *reg;
+
+	clks = CODE_GET_CLKS(code);
+
+	adm5120_info.product_code = CODE_GET_PC(code);
+	adm5120_info.revision = CODE_GET_REV(code);
+
+	adm5120_info.cpu_speed = CPU_SPEED_175;
+	if (clks & 1)
+		adm5120_info.cpu_speed += 25000000;
+	if (clks & 2)
+		adm5120_info.cpu_speed += 50000000;
+
+	adm5120_info.cpu_package = (CODE_GET_PK(code) == CODE_PK_BGA) ?
+		CPU_PACKAGE_BGA : CPU_PACKAGE_PQFP;
+
+	adm5120_info.nand_boot = CODE_GET_NAB(code);
+
+}
+
+/*
+ * Boot loader detection routines
+ */
+static int __init detect_cfe(void)
+{
+	/*
+	 * This method only works, when we are booted directly from the CFE.
+	 */
+	uint32_t cfe_handle = (uint32_t) fw_arg0;
+	uint32_t cfe_a1_val = (uint32_t) fw_arg1;
+	uint32_t cfe_entry = (uint32_t) fw_arg2;
+	uint32_t cfe_seal = (uint32_t) fw_arg3;
+
+	/* Check for CFE by finding the CFE magic number */
+	if (cfe_seal != CFE_EPTSEAL) {
+		/* We are not booted from CFE */
+		return 0;
+	}
+
+	/* cfe_a1_val must be 0, because only one CPU present in the ADM5120 SoC */
+	if (cfe_a1_val != 0) {
+		return 0;
+	}
+
+	/* The cfe_handle, and the cfe_entry must be kernel mode addresses */
+	if ((cfe_handle < KSEG0) || (cfe_entry < KSEG0)) {
+		return 0;
+	}
+
+	return 1;
+}
+
+static int __init detect_uboot(void)
+{
+	/* FIXME: not yet implemented */
+	return 0;
+}
+
+static int __init detect_myloader(void)
+{
+	struct mylo_system_params *sysp;
+	struct mylo_board_params *boardp;
+	struct mylo_partition_table *parts;
+
+	sysp = (struct mylo_system_params *)(MYLO_MIPS_SYS_PARAMS);
+	boardp = (struct mylo_board_params *)(MYLO_MIPS_BOARD_PARAMS);
+	parts = (struct mylo_partition_table *)(MYLO_MIPS_PARTITIONS);
+
+	/* Check for some magic numbers */
+	if ((sysp->magic != MYLO_MAGIC_SYS_PARAMS) ||
+	   (boardp->magic != MYLO_MAGIC_BOARD_PARAMS) ||
+	   (parts->magic != MYLO_MAGIC_PARTITIONS))
+		return 0;
+
+	return 1;
+}
+
+static int __init detect_routerboot(void)
+{
+	/* FIXME: not yet implemented */
+	return 0;
+}
+
+static int __init detect_bootloader(void)
+{
+	if (detect_cfe())
+		return BOOT_LOADER_CFE;
+
+	if (detect_uboot())
+		return BOOT_LOADER_UBOOT;
+
+	if (detect_myloader())
+		return BOOT_LOADER_MYLOADER;
+
+	if (detect_routerboot())
+		return BOOT_LOADER_ROUTERBOOT;
+
+	return BOOT_LOADER_UNKNOWN;
+}
+
+/*
+ * Board detection
+ */
+static void __init detect_board_type(void)
+{
+	/* FIXME: not yet implemented */
+}
+
+void __init adm5120_info_show(void)
+{
+	printk("ADM%04X%s revision %d, running at %ldMHz\n",
+		adm5120_info.product_code,
+		(adm5120_info.cpu_package == CPU_PACKAGE_BGA) ? "" : "P",
+		adm5120_info.revision,
+		(adm5120_info.cpu_speed / 1000000)
+		);
+	printk("Boot loader is: %s\n", boot_loader_names[adm5120_info.boot_loader]);
+	printk("Booted from   : %s flash\n", adm5120_info.nand_boot ? "NAND" : "NOR");
+}
+
+void __init adm5120_info_init(void)
+{
+	detect_cpu_info();
+	adm5120_info.boot_loader = detect_bootloader();
+	detect_board_type();
+
+	adm5120_info_show();
+}