[U-Boot] [PATCH 03/10] ARM: socfpga: arria10: add reset manager for Arria10

[Marek Vasut]

On Thursday, November 19, 2015 at 10:35:40 PM, dinguyen at opensource.altera.com 
wrote:
> From: Dinh Nguyen <dinguyen at opensource.altera.com>
> 
> Add the defines for the reset manager and some basic reset functionality.
> 
> Signed-off-by: Dinh Nguyen <dinguyen at opensource.altera.com>
> ---
>  arch/arm/mach-socfpga/arria10/reset_manager_a10.c  |  83 +++++++++++
>  .../mach-socfpga/include/mach/reset_manager_a10.h  | 162
> +++++++++++++++++++++ 2 files changed, 245 insertions(+)
>  create mode 100644 arch/arm/mach-socfpga/arria10/reset_manager_a10.c
>  create mode 100644 arch/arm/mach-socfpga/include/mach/reset_manager_a10.h
> 
> diff --git a/arch/arm/mach-socfpga/arria10/reset_manager_a10.c
> b/arch/arm/mach-socfpga/arria10/reset_manager_a10.c new file mode 100644
> index 0000000..e2d315a
> --- /dev/null
> +++ b/arch/arm/mach-socfpga/arria10/reset_manager_a10.c
> @@ -0,0 +1,83 @@
> +/*
> + * Copyright (C) 2014 Altera Corporation <www.altera.com>
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <asm/io.h>
> +#include <asm/arch/reset_manager_a10.h>
> +#include <asm/arch/system_manager_a10.h>
> +#include <fdtdec.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;

This whole file looks pretty similar to the CV/AV reset manager, can't we
just merge those two into a single file ?

btw. I dont think you need the DECLARE_GLOBAL_DATA_PTR here.

> +static const struct socfpga_reset_manager *reset_manager_base =
> +		(void *)SOCFPGA_RSTMGR_ADDRESS;
> +

[...]

> +#define ALT_RSTMGR_BRGMODRST_H2F_SET_MSK	0x00000001
> +#define ALT_RSTMGR_BRGMODRST_LWH2F_SET_MSK	0x00000002
> +#define ALT_RSTMGR_BRGMODRST_F2H_SET_MSK	0x00000004
> +#define ALT_RSTMGR_BRGMODRST_F2SSDRAM0_SET_MSK	0x00000008
> +#define ALT_RSTMGR_BRGMODRST_F2SSDRAM1_SET_MSK	0x00000010
> +#define ALT_RSTMGR_BRGMODRST_F2SSDRAM2_SET_MSK	0x00000020
> +#define ALT_RSTMGR_BRGMODRST_DDRSCH_SET_MSK	0x00000040

All these are probably just bits, so please use 1 << n here.

> +#define ALT_RSTMGR_HDSKEN_SDRSELFREFEN_SET_MSK	0x00000001
> +#define ALT_RSTMGR_HDSKEN_FPGAMGRHSEN_SET_MSK	0x00000002
> +#define ALT_RSTMGR_HDSKEN_FPGAHSEN_SET_MSK	0x00000004
> +#define ALT_RSTMGR_HDSKEN_ETRSTALLEN_SET_MSK	0x00000008
> +
> +/*
> + * Define a reset identifier, from which a permodrst bank ID
> + * and reset ID can be extracted using the subsequent macros
> + * RSTMGR_RESET() and RSTMGR_BANK().
> + */
> +#define RSTMGR_BANK_OFFSET	8
> +#define RSTMGR_BANK_MASK	0x7
> +#define RSTMGR_RESET_OFFSET	0
> +#define RSTMGR_RESET_MASK	0x1f
> +#define RSTMGR_DEFINE(_bank, _offset)		\
> +	((_bank) << RSTMGR_BANK_OFFSET) | ((_offset) << RSTMGR_RESET_OFFSET)
> +
> +/* Extract reset ID from the reset identifier. */
> +#define RSTMGR_RESET(_reset)			\
> +	(((_reset) >> RSTMGR_RESET_OFFSET) & RSTMGR_RESET_MASK)
> +
> +/* Extract bank ID from the reset identifier. */
> +#define RSTMGR_BANK(_reset)			\
> +(((_reset) >> RSTMGR_BANK_OFFSET) & RSTMGR_BANK_MASK)
> +
> +/*
> + * SocFPGA Cyclone V/Arria V reset IDs, bank mapping is as follows:

Oh yeah ? Looks arria10-ish to me :-)

> + * 0 ... mpumodrst
> + * 1 ... per0modrst
> + * 2 ... per1modrst
> + * 3 ... brgmodrst
> + * 4 ... sysmodrst
> + */
> +#define RSTMGR_EMAC0		RSTMGR_DEFINE(1, 0)
> +#define RSTMGR_EMAC1		RSTMGR_DEFINE(1, 1)
> +#define RSTMGR_EMAC2		RSTMGR_DEFINE(1, 2)
> +#define RSTMGR_WD0		RSTMGR_DEFINE(2, 0)
> +#define RSTMGR_WD1		RSTMGR_DEFINE(2, 1)
> +#define RSTMGR_L4SYSTIMER0	RSTMGR_DEFINE(2, 2)
> +#define RSTMGR_L4SYSTIMER1	RSTMGR_DEFINE(2, 3)
> +#define RSTMGR_SPTIMER0		RSTMGR_DEFINE(2, 4)
> +#define RSTMGR_SPTIMER1		RSTMGR_DEFINE(2, 5)
> +#define RSTMGR_UART0		RSTMGR_DEFINE(2, 16)
> +#define RSTMGR_UART1		RSTMGR_DEFINE(2, 17)
> +#define RSTMGR_SPIM0		RSTMGR_DEFINE(1, 17)
> +#define RSTMGR_SPIM1		RSTMGR_DEFINE(1, 18)
> +#define RSTMGR_QSPI		RSTMGR_DEFINE(1, 6)
> +#define RSTMGR_SDMMC		RSTMGR_DEFINE(1, 7)
> +#define RSTMGR_DMA		RSTMGR_DEFINE(1, 16)
> +#define RSTMGR_DDRSCH		RSTMGR_DEFINE(3, 6)
> +
> +/* Create a human-readable reference to SoCFPGA reset. */
> +#define SOCFPGA_RESET(_name)	RSTMGR_##_name
> +
> +#endif /* _SOCFPGA_RESET_MANAGER_A10_H_ */