ARMV7: Add basic support for TI OMAP4

This patch adds minimum support for OMAP4. Code which can be shared
between OMAP3 and OMAP4 is placed in arch/arm/cpu/armv7/omap-common

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

4 files changed, 240 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/omap4/Makefile b/arch/arm/cpu/armv7/omap4/Makefile
new file mode 100644
index 0000000..ecf64f9
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap4/Makefile
@@ -0,0 +1,48 @@
+#
+# (C) Copyright 2000-2010
+# Wolfgang Denk, DENX Software Engineering, wd@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 $(TOPDIR)/config.mk
+
+LIB	=  $(obj)lib$(SOC).a
+
+SOBJS	+= lowlevel_init.o
+
+COBJS	+= board.o
+COBJS	+= sys_info.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
+
+all:	 $(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c
new file mode 100644
index 0000000..5bf7173
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap4/board.c
@@ -0,0 +1,90 @@
+/*
+ *
+ * Common functions for OMAP4 based boards
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ *	Aneesh V	<aneesh@ti.com>
+ *	Steve Sakoman	<steve@sakoman.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/arch/cpu.h>
+#include <asm/arch/sys_proto.h>
+
+/*
+ * Routine: s_init
+ * Description: Does early system init of muxing and clocks.
+ *              - Called path is with SRAM stack.
+ */
+void s_init(void)
+{
+	watchdog_init();
+}
+
+/*
+ * Routine: wait_for_command_complete
+ * Description: Wait for posting to finish on watchdog
+ */
+void wait_for_command_complete(struct watchdog *wd_base)
+{
+	int pending = 1;
+	do {
+		pending = readl(&wd_base->wwps);
+	} while (pending);
+}
+
+/*
+ * Routine: watchdog_init
+ * Description: Shut down watch dogs
+ */
+void watchdog_init(void)
+{
+	struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
+
+	writel(WD_UNLOCK1, &wd2_base->wspr);
+	wait_for_command_complete(wd2_base);
+	writel(WD_UNLOCK2, &wd2_base->wspr);
+}
+
+/*
+ * Routine: dram_init
+ * Description: sets uboots idea of sdram size
+ */
+int dram_init(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	gd->bd->bi_dram[0].start = 0x80000000;
+	gd->bd->bi_dram[0].size = 512 << 20;
+	return 0;
+}
+
+/*
+ * Print board information
+ */
+int checkboard(void)
+{
+	puts(sysinfo.board_string);
+	return 0;
+}
+
diff --git a/arch/arm/cpu/armv7/omap4/lowlevel_init.S b/arch/arm/cpu/armv7/omap4/lowlevel_init.S
new file mode 100644
index 0000000..9a181eb
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap4/lowlevel_init.S
@@ -0,0 +1,48 @@
+/*
+ * Board specific setup info
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ *	Aneesh V	<aneesh@ti.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 <asm/arch/omap4.h>
+
+.globl lowlevel_init
+lowlevel_init:
+	/*
+	 * Setup a temporary stack
+	 */
+	ldr	sp, =LOW_LEVEL_SRAM_STACK
+
+	/*
+	 * Save the old lr(passed in ip) and the current lr to stack
+	 */
+	push	{ip, lr}
+
+	/*
+	 * go setup pll, mux, memory
+	 */
+	bl	s_init
+	pop	{ip, pc}
+
diff --git a/arch/arm/cpu/armv7/omap4/sys_info.c b/arch/arm/cpu/armv7/omap4/sys_info.c
new file mode 100644
index 0000000..3b73191
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap4/sys_info.c
@@ -0,0 +1,54 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ *	Aneesh V	<aneesh@ti.com>
+ *	Steve Sakoman	<steve@sakoman.com>
+ *
+ * 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/arch/sys_proto.h>
+
+/*
+ *  get_device_type(): tell if GP/HS/EMU/TST
+ */
+u32 get_device_type(void)
+{
+	return 0;
+}
+
+/*
+ * get_board_rev() - get board revision
+ */
+u32 get_board_rev(void)
+{
+	return 0x20;
+}
+
+/*
+ * Print CPU information
+ */
+int print_cpuinfo(void)
+{
+
+	puts("CPU  : OMAP4430\n");
+
+	return 0;
+}
+