socfpga: Creating driver for Reset Manager

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@altera.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Pavel Machek <pavel@denx.de>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Tom Rini <trini@ti.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>

arch/arm/cpu/armv7/socfpga/Makefile

@@ -13,7 +13,7 @@ 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)

arch/arm/cpu/armv7/socfpga/misc.c

@@ -6,36 +6,9 @@
 
 #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);

arch/arm/cpu/armv7/socfpga/reset_manager.c

@@ -0,0 +1,39 @@
+/*
+ *  Copyright (C) 2013 Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+
+#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);
+}

arch/arm/include/asm/arch-socfpga/reset_manager.h

@@ -11,16 +11,20 @@ void reset_cpu(ulong addr);
 void reset_deassert_peripherals_handoff(void);
 
 struct socfpga_reset_manager {
-	u32	padding1;
+	u32	status;
 	u32	ctrl;
-	u32	padding2;
+	u32	counts;
-	u32	padding3;
+	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_ */