[U-Boot] [RESEND PATCH v5 1/1] socfpga: Creating driver for Reset Manager

[Dinh Nguyen]

On Tue, 2013-08-06 at 09:09 -0500, Chin Liang See wrote:
> 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>
> Reviewed-by: Pavel Machek

Add Pavel's email address.

> Cc: Wolfgang Denk <wd at denx.de>
> CC: Pavel Machek <pavel at denx.de>
> Cc: Dinh Nguyen <dinguyen at altera.com>
> Cc: Tom Rini <trini at ti.com>
> Cc: Albert Aribaud <albert.u.boot at aribaud.net>
> ---
> 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
> Changes for v4:
>    - Updated the license header for reset_manager.c
> Changes for v5:
>    - Updated the license header for reset_manager.c to SPDX

re-org to have latest changes, v5, at the top.
> ---
>  arch/arm/cpu/armv7/socfpga/Makefile               |    2 +-
>  arch/arm/cpu/armv7/socfpga/misc.c                 |   27 --------------
>  arch/arm/cpu/armv7/socfpga/reset_manager.c        |   40 +++++++++++++++++++++
>  arch/arm/include/asm/arch-socfpga/reset_manager.h |   10 ++++--
>  4 files changed, 48 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 3b48ac9..5024fc5 100644
> --- a/arch/arm/cpu/armv7/socfpga/Makefile
> +++ b/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)
> diff --git a/arch/arm/cpu/armv7/socfpga/misc.c b/arch/arm/cpu/armv7/socfpga/misc.c
> index 66edb3c..2f1c716 100644
> --- a/arch/arm/cpu/armv7/socfpga/misc.c
> +++ b/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);
> 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..2281743
> --- /dev/null
> +++ b/arch/arm/cpu/armv7/socfpga/reset_manager.c
> @@ -0,0 +1,40 @@
> +/*
> + * Copyright Altera Corporation (C) 2013
> + *
> + * 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);
> +}
> +
> +
> diff --git a/arch/arm/include/asm/arch-socfpga/reset_manager.h b/arch/arm/include/asm/arch-socfpga/reset_manager.h
> index 13d7357..3e95476 100644
> --- a/arch/arm/include/asm/arch-socfpga/reset_manager.h
> +++ b/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	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_ */