[U-Boot] [PATCH v3 1/1] socfpga: Creating driver for Reset Manager

[Chin Liang See]

Consolidating reset code into reset_manager.c.
Also separating reset configuration for virtual target
and real hardware Cyclone V development kit

Signed-off-by: Chin Liang See <clsee at altera.com>
Cc: Wolfgang Denk <wd at denx.de>
CC: Pavel Machek <pavel at denx.de>
Cc: Dinh Nguyen <dinguyen at altera.com>
---
Changes for v2:
   - Fixed the long subject of the patch
   - Consolidated the reset_manager structure between virtual target and dev kit
Changes for v3:
   - Added change log for each revision change
   - Removed the < > between the date of copyright header

 arch/arm/cpu/armv7/socfpga/Makefile               |    2 +-
 arch/arm/cpu/armv7/socfpga/misc.c                 |   27 -----------
 arch/arm/cpu/armv7/socfpga/reset_manager.c        |   52 +++++++++++++++++++++
 arch/arm/include/asm/arch-socfpga/reset_manager.h |   10 ++--
 4 files changed, 60 insertions(+), 31 deletions(-)
 create mode 100644 arch/arm/cpu/armv7/socfpga/reset_manager.c

diff --git a/arch/arm/cpu/armv7/socfpga/Makefile b/arch/arm/cpu/armv7/socfpga/Makefile
index 376a4bd..518e67a 100644
--- a/arch/arm/cpu/armv7/socfpga/Makefile
+++ b/arch/arm/cpu/armv7/socfpga/Makefile
@@ -29,7 +29,7 @@ include $(TOPDIR)/config.mk
 LIB	=  $(obj)lib$(SOC).o
 
 SOBJS	:= lowlevel_init.o
-COBJS-y	:= misc.o timer.o
+COBJS-y	:= misc.o timer.o reset_manager.o
 COBJS-$(CONFIG_SPL_BUILD) += spl.o
 
 COBJS	:= $(COBJS-y)
diff --git a/arch/arm/cpu/armv7/socfpga/misc.c b/arch/arm/cpu/armv7/socfpga/misc.c
index fa16424..59f5b94 100644
--- a/arch/arm/cpu/armv7/socfpga/misc.c
+++ b/arch/arm/cpu/armv7/socfpga/misc.c
@@ -17,36 +17,9 @@
 
 #include <common.h>
 #include <asm/io.h>
-#include <asm/arch/reset_manager.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-static const struct socfpga_reset_manager *reset_manager_base =
-		(void *)SOCFPGA_RSTMGR_ADDRESS;
-
-/*
- * Write the reset manager register to cause reset
- */
-void reset_cpu(ulong addr)
-{
-	/* request a warm reset */
-	writel(RSTMGR_CTRL_SWWARMRSTREQ_LSB, &reset_manager_base->ctrl);
-	/*
-	 * infinite loop here as watchdog will trigger and reset
-	 * the processor
-	 */
-	while (1)
-		;
-}
-
-/*
- * Release peripherals from reset based on handoff
- */
-void reset_deassert_peripherals_handoff(void)
-{
-	writel(0, &reset_manager_base->per_mod_reset);
-}
-
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
diff --git a/arch/arm/cpu/armv7/socfpga/reset_manager.c b/arch/arm/cpu/armv7/socfpga/reset_manager.c
new file mode 100644
index 0000000..b64db68
--- /dev/null
+++ b/arch/arm/cpu/armv7/socfpga/reset_manager.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright Altera Corporation (C) 2013. All rights reserved
+ *
+ * This program is free software; you can redistribute it
+ * and/or modify it under the terms and conditions of the
+ * GNU General Public License, version 2, as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/reset_manager.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct socfpga_reset_manager *reset_manager_base =
+		(void *)SOCFPGA_RSTMGR_ADDRESS;
+
+/*
+ * Write the reset manager register to cause reset
+ */
+void reset_cpu(ulong addr)
+{
+	/* request a warm reset */
+	writel((1 << RSTMGR_CTRL_SWWARMRSTREQ_LSB),
+		&reset_manager_base->ctrl);
+	/*
+	 * infinite loop here as watchdog will trigger and reset
+	 * the processor
+	 */
+	while (1)
+		;
+}
+
+/*
+ * Release peripherals from reset based on handoff
+ */
+void reset_deassert_peripherals_handoff(void)
+{
+	writel(0, &reset_manager_base->per_mod_reset);
+}
+
+
diff --git a/arch/arm/include/asm/arch-socfpga/reset_manager.h b/arch/arm/include/asm/arch-socfpga/reset_manager.h
index d9d2c1c..4930914 100644
--- a/arch/arm/include/asm/arch-socfpga/reset_manager.h
+++ b/arch/arm/include/asm/arch-socfpga/reset_manager.h
@@ -22,16 +22,20 @@ void reset_cpu(ulong addr);
 void reset_deassert_peripherals_handoff(void);
 
 struct socfpga_reset_manager {
-	u32	padding1;
+	u32	status;
 	u32	ctrl;
-	u32	padding2;
-	u32	padding3;
+	u32	counts;
+	u32	padding1;
 	u32	mpu_mod_reset;
 	u32	per_mod_reset;
 	u32	per2_mod_reset;
 	u32	brg_mod_reset;
 };
 
+#if defined(CONFIG_SOCFPGA_VIRTUAL_TARGET)
+#define RSTMGR_CTRL_SWWARMRSTREQ_LSB 2
+#else
 #define RSTMGR_CTRL_SWWARMRSTREQ_LSB 1
+#endif
 
 #endif /* _RESET_MANAGER_H_ */
-- 
1.7.9.5