SPEAr: Add basic arch related support for SPEAr SoCs

Earlier, architecture specific init code was mixed with board initialization
code in board/spear/... This patch updates architecture support for SPEAr in
latest u-boot and prints the SoC information.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>

arch/arm/cpu/arm926ejs/spear/Makefile

@@ -25,7 +25,8 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).o
 
-COBJS	:= reset.o \
+COBJS	:= cpu.o \
+	   reset.o \
 	   timer.o
 SOBJS	:=
 

arch/arm/cpu/arm926ejs/spear/cpu.c

@@ -0,0 +1,82 @@
+/*
+ * (C) Copyright 2010
+ * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
+ *
+ * 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 <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/spr_misc.h>
+
+int arch_cpu_init(void)
+{
+	struct misc_regs *const misc_p =
+	    (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
+	u32 periph1_clken;
+
+	periph1_clken = readl(&misc_p->periph1_clken);
+
+#if defined(CONFIG_SPEAR3XX)
+	periph1_clken |= MISC_GPT2ENB;
+#elif defined(CONFIG_SPEAR600)
+	periph1_clken |= MISC_GPT3ENB;
+#endif
+
+#if defined(CONFIG_PL011_SERIAL)
+	periph1_clken |= MISC_UART0ENB;
+#endif
+#if defined(CONFIG_DESIGNWARE_ETH)
+	periph1_clken |= MISC_ETHENB;
+#endif
+#if defined(CONFIG_DW_UDC)
+	periph1_clken |= MISC_USBDENB;
+#endif
+#if defined(CONFIG_DW_I2C)
+	periph1_clken |= MISC_I2CENB;
+#endif
+#if defined(CONFIG_ST_SMI)
+	periph1_clken |= MISC_SMIENB;
+#endif
+#if defined(CONFIG_NAND_FSMC)
+	periph1_clken |= MISC_FSMCENB;
+#endif
+
+	writel(periph1_clken, &misc_p->periph1_clken);
+	return 0;
+}
+
+#ifdef CONFIG_DISPLAY_CPUINFO
+int print_cpuinfo(void)
+{
+#ifdef CONFIG_SPEAR300
+	printf("CPU:   SPEAr300\n");
+#elif defined(CONFIG_SPEAR310)
+	printf("CPU:   SPEAr310\n");
+#elif defined(CONFIG_SPEAR320)
+	printf("CPU:   SPEAr320\n");
+#elif defined(CONFIG_SPEAR600)
+	printf("CPU:   SPEAr600\n");
+#else
+#error CPU not supported in spear platform
+#endif
+	return 0;
+}
+#endif

arch/arm/include/asm/arch-spear/spr_misc.h

@@ -126,5 +126,12 @@ struct misc_regs {
 
 /* PERIPH1_CLKEN, PERIPH1_RST value */
 #define MISC_USBDENB			0x01000000
+#define MISC_ETHENB			0x00800000
+#define MISC_SMIENB			0x00200000
+#define MISC_GPT3ENB			0x00010000
+#define MISC_GPT2ENB			0x00000800
+#define MISC_FSMCENB			0x00000200
+#define MISC_I2CENB			0x00000080
+#define MISC_UART0ENB			0x00000008
 
 #endif

include/configs/spear-common.h

@@ -183,6 +183,8 @@
 #define CONFIG_ENV_SIZE				0x02000
 
 /* Miscellaneous configurable options */
+#define CONFIG_ARCH_CPU_INIT
+#define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_BOOT_PARAMS_ADDR			0x00000100
 #define CONFIG_CMDLINE_TAG			1
 #define CONFIG_SETUP_MEMORY_TAGS		1