> -----Original Message----- > From: Holger Brunck [mailto:holger.bru...@keymile.com] > Sent: 20 July 2012 18:04 > To: u-boot@lists.denx.de > Cc: Gerlando Falauto; Holger Brunck; Prafulla Wadaskar; Valentin > Longchamp; Marek Vasut > Subject: [PATCH v3 2/4] kirkwood: implement kw_sdram_bs_set() > > From: Gerlando Falauto <gerlando.fala...@keymile.com> > > Some boards might be equipped with different SDRAM configurations. > When that is the case, CPU CS Window Size Register (CS[0]n Size) > should be set to the biggest value through board.cfg file; then its > value can be fixed at runtime according to the detected SDRAM size. > > Therefore, implement kw_sdram_bs_set(). > > Signed-off-by: Gerlando Falauto <gerlando.fala...@keymile.com> > Signed-off-by: Holger Brunck <holger.bru...@keymile.com> > cc: Prafulla Wadaskar <prafu...@marvell.com> > cc: Valentin Longchamp <valentin.longch...@keymile.com> > cc: Marek Vasut <ma...@denx.de> > --- > changes for v3: > - remove reviewed by, because there are some chages in > - use c-struct instead of defines > - make kw_sdram_bs_set static > changes for v2: > - added Reviewed-by: Marek Vasut <ma...@denx.de> > > arch/arm/cpu/arm926ejs/kirkwood/dram.c | 24 > ++++++++++++++++++++++++ > 1 files changed, 24 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/cpu/arm926ejs/kirkwood/dram.c > b/arch/arm/cpu/arm926ejs/kirkwood/dram.c > index 1c5faab..5e2f9d8 100644 > --- a/arch/arm/cpu/arm926ejs/kirkwood/dram.c > +++ b/arch/arm/cpu/arm926ejs/kirkwood/dram.c > @@ -39,6 +39,11 @@ struct kw_sdram_addr_dec { > struct kw_sdram_bank sdram_bank[4]; > }; > > +#define KW_REG_CPUCS_WIN_ENABLE (1 << 0) > +#define KW_REG_CPUCS_WIN_WR_PROTECT (1 << 1) > +#define KW_REG_CPUCS_WIN_WIN0_CS(x) (((x) & 0x3) << 2) > +#define KW_REG_CPUCS_WIN_SIZE(x) (((x) & 0xff) << 24) > + > /* > * kw_sdram_bar - reads SDRAM Base Address Register > */ > @@ -57,6 +62,25 @@ u32 kw_sdram_bar(enum memory_bank bank) > } > > /* > + * kw_sdram_bs_set - writes SDRAM Bank size > + */ > +static void kw_sdram_bs_set(enum memory_bank bank, u32 size) > +{ > + struct kw_sdram_addr_dec *base = > + (struct kw_sdram_addr_dec *)KW_REGISTER(0x1500); > + /* Read current register value */ > + u32 reg = readl(&base->sdram_bank[bank].win_sz); > + > + /* Clear window size */ > + reg &= ~KW_REG_CPUCS_WIN_SIZE(0xFF); > + > + /* Set new window size */ > + reg |= KW_REG_CPUCS_WIN_SIZE((size - 1) >> 24); > + > + writel(reg, &base->sdram_bank[bank].win_sz); > +} > + > +/* > * kw_sdram_bs - reads SDRAM Bank size > */ > u32 kw_sdram_bs(enum memory_bank bank) > --
Acked-by: Prafulla Wadaskar <prafu...@marvell.com> Regards... Prafulla . . . _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
