[U-Boot] [PATCH V8 6/9] omap3: new SPL structure support

[Simon Schwarz <simonschwarzcor@googlemail.com>]

Support for the new spl structure. Using the interface defined by Aneesh V for
OMAP4

Signed-off-by: Simon Schwarz <simonschwarzcor@gmail.com>
---
V1 changes:
ADD support for early console output in SPL

V2 changes:
ADD include omap_common.h in board.c
ADD implement new omap common interface omap_boot_device, omap_boot_mode and
    omap_rev_string (very basic)
CHG cosmetic
CHG Don't add ecc switch command in SPL
ADD save_boot_params stump with warning to implement it

V3 changes:
none

V4 changes:
CHG cosmetic - corrected style problem

V5 changes:
nothing

V6 changes:
nothing

V7 changes:
ADD copied config.mk from OMAP4 to OMAP3

V8 changes:
CHG boot_mode can't be detected on OMAP3 so the function is not needed

Transition from V1 to V2 also includes that this patch is now based on
    - the new SPL layout by Aneesh V and Daniel Schwierzeck
    - the OMAP4 SPL patches by Aneesh V

This is in some parts a anccesstor of "[U-Boot,2/5] devkit8000 nand_spl: omap3
support nand_spl boot"
(http://article.gmane.org/gmane.comp.boot-loaders.u-boot/102114) in V1
---
 arch/arm/cpu/armv7/omap3/board.c            |   32 +++++++++++++++++++++++++-
 arch/arm/cpu/armv7/omap3/config.mk          |   30 +++++++++++++++++++++++++
 arch/arm/cpu/armv7/omap3/lowlevel_init.S    |    5 ++++
 arch/arm/include/asm/arch-omap3/sys_proto.h |    1 +
 4 files changed, 66 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm/cpu/armv7/omap3/config.mk

diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c
index 4aaf97b..ad4db9b 100644
--- a/arch/arm/cpu/armv7/omap3/board.c
+++ b/arch/arm/cpu/armv7/omap3/board.c
@@ -39,6 +39,7 @@
 #include <asm/cache.h>
 #include <asm/armv7.h>
 #include <asm/omap_gpio.h>
+#include <asm/omap_common.h>
 
 /* Declarations */
 extern omap3_sysinfo sysinfo;
@@ -56,6 +57,23 @@ static const struct gpio_bank gpio_bank_34xx[6] = {
 
 const struct gpio_bank *const omap_gpio_bank = gpio_bank_34xx;
 
+#ifdef CONFIG_SPL_BUILD
+/*
+* We use static variables because global data is not ready yet.
+* Initialized data is available in SPL right from the beginning.
+* We would not typically need to save these parameters in regular
+* U-Boot. This is needed only in SPL at the moment.
+*/
+u32 omap3_boot_device = BOOT_DEVICE_NAND;
+
+u32 omap_boot_device(void)
+{
+	return omap3_boot_device;
+}
+
+#endif /* CONFIG_SPL_BUILD */
+
+
 /******************************************************************************
  * Routine: delay
  * Description: spinning delay to use before udelay works
@@ -197,6 +215,10 @@ void s_init(void)
 
 	per_clocks_enable();
 
+#ifdef CONFIG_SPL_BUILD
+	preloader_console_init();
+#endif
+
 	if (!in_sdram)
 		mem_init();
 }
@@ -245,7 +267,7 @@ void abort(void)
 {
 }
 
-#ifdef CONFIG_NAND_OMAP_GPMC
+#if defined(CONFIG_NAND_OMAP_GPMC) & !defined(CONFIG_SPL_BUILD)
 /******************************************************************************
  * OMAP3 specific command to switch between NAND HW and SW ecc
  *****************************************************************************/
@@ -273,7 +295,7 @@ U_BOOT_CMD(
 	"[hw/sw] - Switch between NAND hardware (hw) or software (sw) ecc algorithm"
 );
 
-#endif /* CONFIG_NAND_OMAP_GPMC */
+#endif /* CONFIG_NAND_OMAP_GPMC & !CONFIG_SPL_BUILD */
 
 #ifdef CONFIG_DISPLAY_BOARDINFO
 /**
@@ -402,3 +424,9 @@ void v7_outer_cache_disable(void)
 	omap3_update_aux_cr(0, 0x2);
 }
 #endif
+
+void omap_rev_string(char *omap_rev_string)
+{
+	sprintf(omap_rev_string, "OMAP3, sorry revision detection" \
+		" unimplemented");
+}
diff --git a/arch/arm/cpu/armv7/omap3/config.mk b/arch/arm/cpu/armv7/omap3/config.mk
new file mode 100644
index 0000000..b34fa64
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap3/config.mk
@@ -0,0 +1,30 @@
+#
+# Copyright 2011 Linaro Limited
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# (C) Copyright 2010
+# Texas Instruments, <www.ti.com>
+#
+# Aneesh V <aneesh@ti.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
+#
+ifdef CONFIG_SPL_BUILD
+ALL-y	+= $(OBJTREE)/MLO
+else
+ALL-y	+= $(obj)u-boot.img
+endif
diff --git a/arch/arm/cpu/armv7/omap3/lowlevel_init.S b/arch/arm/cpu/armv7/omap3/lowlevel_init.S
index 67e8ceb..48a7ec6 100644
--- a/arch/arm/cpu/armv7/omap3/lowlevel_init.S
+++ b/arch/arm/cpu/armv7/omap3/lowlevel_init.S
@@ -35,6 +35,11 @@
 _TEXT_BASE:
 	.word	CONFIG_SYS_TEXT_BASE	/* sdram load addr from config.mk */
 
+.global save_boot_params
+save_boot_params:
+	#warning "Please implement save_boot_params for OMAP3"
+	bx lr
+
 .global omap3_gp_romcode_call
 omap3_gp_romcode_call:
 	PUSH {r4-r12, lr} @ Save all registers from ROM code!
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 995e7cb..7b60051 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -71,4 +71,5 @@ void power_init_r(void);
 void dieid_num_r(void);
 void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
 void omap3_gp_romcode_call(u32 service_id, u32 parameter);
+void omap_rev_string(char *omap_rev_string);
 #endif
-- 
1.7.4.1