[U-Boot] [PATCH v5 3/4] arm: socfpga: stratix10: Add Stratix10 FPGA into FPGA device table

[Ang, Chee Hong <chee.hong.ang@intel.com>]

On Thu, 2018-11-29 at 12:28 +0100, Marek Vasut wrote:
> On 11/29/2018 10:40 AM, chee.hong.ang at intel.com wrote:
> > 
> > From: "Ang, Chee Hong" <chee.hong.ang@intel.com>
> > 
> > Enable 'fpga' command in u-boot. User will be able to use the FPGA
> > command to program the FPGA on Stratix10 SoC.
> > 
> > Signed-off-by: Ang, Chee Hong <chee.hong.ang@intel.com>
> > ---
> >  arch/arm/mach-socfpga/Makefile                   |  4 ++
> >  arch/arm/mach-socfpga/fpga_device.c              | 59
> > ++++++++++++++++++++++++
> >  arch/arm/mach-socfpga/include/mach/fpga_device.h | 15 ++++++
> >  arch/arm/mach-socfpga/include/mach/misc.h        |  6 ---
> >  arch/arm/mach-socfpga/misc.c                     | 31 ------------
> > -
> >  arch/arm/mach-socfpga/misc_arria10.c             |  1 +
> >  arch/arm/mach-socfpga/misc_gen5.c                |  1 +
> >  arch/arm/mach-socfpga/misc_s10.c                 |  3 ++
> >  drivers/fpga/altera.c                            |  6 +++
> >  include/altera.h                                 |  4 ++
> >  10 files changed, 93 insertions(+), 37 deletions(-)
> >  create mode 100644 arch/arm/mach-socfpga/fpga_device.c
> >  create mode 100644 arch/arm/mach-
> > socfpga/include/mach/fpga_device.h
> > 
> > diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-
> > socfpga/Makefile
> > index e667204..2ff1b3f 100644
> > --- a/arch/arm/mach-socfpga/Makefile
> > +++ b/arch/arm/mach-socfpga/Makefile
> > @@ -10,6 +10,10 @@ obj-y	+= clock_manager.o
> >  obj-y	+= misc.o
> >  obj-y	+= reset_manager.o
> >  
> > +ifdef CONFIG_FPGA
> > +obj-y	+= fpga_device.o
> > +endif
> > +
> >  ifdef CONFIG_TARGET_SOCFPGA_GEN5
> >  obj-y	+= clock_manager_gen5.o
> >  obj-y	+= misc_gen5.o
> > diff --git a/arch/arm/mach-socfpga/fpga_device.c b/arch/arm/mach-
> > socfpga/fpga_device.c
> > new file mode 100644
> > index 0000000..97b27eb
> > --- /dev/null
> > +++ b/arch/arm/mach-socfpga/fpga_device.c
> > @@ -0,0 +1,59 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (C) 2018 Intel Corporation <www.intel.com>
> > + */
> > +
> > +#include <common.h>
> > +#include <altera.h>
> > +
> > +#ifdef CONFIG_FPGA_STRATIX10
> > +/*
> > + * FPGA programming support for SoC FPGA Stratix 10
> > + */
> > +static Altera_desc altera_fpga[] = {
> > +	{
> > +		/* Family */
> > +		Intel_FPGA_Stratix10,
> > +		/* Interface type */
> > +		secure_device_manager_mailbox,
> > +		/* No limitation as additional data will be
> > ignored */
> > +		-1,
> > +		/* No device function table */
> > +		NULL,
> > +		/* Base interface address specified in driver */
> > +		NULL,
> > +		/* No cookie implementation */
> > +		0
> > +	},
> > +};
> > +#else
> > +/*
> > + * FPGA programming support for SoC FPGA Cyclone V
> > + */
> > +static Altera_desc altera_fpga[] = {
> > +	{
> > +		/* Family */
> > +		Altera_SoCFPGA,
> > +		/* Interface type */
> > +		fast_passive_parallel,
> > +		/* No limitation as additional data will be
> > ignored */
> > +		-1,
> > +		/* No device function table */
> > +		NULL,
> > +		/* Base interface address specified in driver */
> > +		NULL,
> > +		/* No cookie implementation */
> > +		0
> > +	},
> > +};
> > +#endif
> > +
> > +/* add device descriptor to FPGA device table */
> > +void socfpga_fpga_add(void)
> > +{
> > +	int i;
> > +
> > +	fpga_init();
> > +	for (i = 0; i < ARRAY_SIZE(altera_fpga); i++)
> > +		fpga_add(fpga_altera, &altera_fpga[i]);
> Why do we need this loop if there's only one entry in the array ?
This ensure we have support for future platforms which might have more
than 1 FPGA devices on the platform.

> btw this function could stay in misc.c , the altera_fpga tables could
> be
> in misc_s10.c resp. something for Gen5 IMO, so you won't need another
> new file.
Yes. This will be addressed in v6 patchsets.