[U-Boot] [PATCH v3 19/20] arm: socfpga: Enable DDR working

[Chee, Tien Fong <tien.fong.chee@intel.com>]

On Jum, 2017-10-20 at 10:11 -0500, Dinh Nguyen wrote:
> Please update your commit header.
> 
> On 10/13/2017 03:08 AM, tien.fong.chee at intel.com wrote:
> > 
> > From: Tien Fong Chee <tien.fong.chee@intel.com>
> > 
> > SPL configures DDR by programming peripheral raw binary file
> > and calibrating DDR.
> > 
> > Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
> > ---
> >  arch/arm/mach-socfpga/spl.c | 56
> > +++++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 56 insertions(+)
> > 
> > diff --git a/arch/arm/mach-socfpga/spl.c b/arch/arm/mach-
> > socfpga/spl.c
> > index aba116d..6c9bf81 100644
> > --- a/arch/arm/mach-socfpga/spl.c
> > +++ b/arch/arm/mach-socfpga/spl.c
> > @@ -15,6 +15,7 @@
> >  #include <asm/arch/system_manager.h>
> >  #include <asm/arch/freeze_controller.h>
> >  #include <asm/arch/clock_manager.h>
> > +#include <asm/arch/fpga_manager.h>
> >  #include <asm/arch/misc.h>
> >  #include <asm/arch/scan_manager.h>
> >  #include <asm/arch/sdram.h>
> > @@ -22,6 +23,10 @@
> >  #include <asm/arch/nic301.h>
> >  #include <asm/sections.h>
> >  #include <fdtdec.h>
> > +#include <fat.h>
> > +#include <fs.h>
> > +#include <linux/ctype.h>
> > +#include <mmc.h>
> >  #include <watchdog.h>
> >  #if defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
> >  #include <asm/arch/pinmux.h>
> > @@ -29,6 +34,9 @@
> >  
> >  DECLARE_GLOBAL_DATA_PTR;
> >  
> > +#define BSIZE	4096
> > +#define PERIPH_RBF	0
> > +
> >  #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
> >  static struct pl310_regs *const pl310 =
> >  	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
> > @@ -197,6 +205,12 @@ void board_init_f(ulong dummy)
> >  #elif defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
> >  void spl_board_init(void)
> >  {
> > +	int rval = 0;
> > +	int len = 0;
> > +	u32 buffer[BSIZE] __aligned(ARCH_DMA_MINALIGN);
> > +	struct spl_boot_device bootdev;
> > +	fpga_fs_info fpga_fsinfo;
> > +
> >  	/* configuring the clock based on handoff */
> >  	cm_basic_init(gd->fdt_blob);
> >  	WATCHDOG_RESET();
> > @@ -214,6 +228,48 @@ void spl_board_init(void)
> >  
> >  	/* Add device descriptor to FPGA device table */
> >  	socfpga_fpga_add();
> > +
> > +	bootdev.boot_device = spl_boot_device();
> > +
> > +	if (BOOT_DEVICE_MMC1 == bootdev.boot_device) {
> > +		struct mmc *mmc = NULL;
> > +		int err = 0;
> > +
> > +		spl_mmc_find_device(&mmc, bootdev.boot_device);
> > +
> > +		err = mmc_init(mmc);
> > +
> > +		if (err) {
> > +#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
> > +			printf("spl: mmc init failed with error:
> > %d\n", err);
> You should use puts instead of printf. But this case use error()? Why
> do
> you need to wrap this around CONFIG_SPL_LIBCOMMON_SUPPORT?
> 
I copied this block of code from /common/spl_mmc.c, so i keep
everything intact. But, i tried to track back the reason of wrapping
around with CONFIG_SPL_LIBCOMMON_SUPPORT, this is what i found "If we
don't have CONFIG_SPL_LIBCOMMON_SUPPORT defined then stdio
functions are unavailable & calling them will cause a link failure."
https://lists.denx.de/pipermail/u-boot/2013-September/161969.html

> > 
> > +#endif
> > +			return;
> > +		}
> > +
> > +		fpga_fsinfo.interface = "mmc";
> > +		fpga_fsinfo.fstype = FS_TYPE_FAT;
> > +	}
> > +
> > +	fpga_fsinfo.dev_part = (char *)get_cff_devpart(gd-
> > >fdt_blob,
> > +							&len);
> > +
> > +	fpga_fsinfo.filename = (char *)get_cff_filename(gd-
> > >fdt_blob,
> > +							 &len,
> > +							 PERIPH_RB
> > F);
> > +
> > +	/* Program peripheral RBF */
> > +	if (fpga_fsinfo.filename)
> > +		rval = fpga_fsload(0, buffer, BSIZE,
> > &fpga_fsinfo);
> > +	else {
> > +		printf("Failed to find peripheral RBF file from
> > DTS\n");
> Use error()?
> 
Okay.
> Dinh