From: Icenowy Zheng <icenowy at aosc.xyz>
Allwinner V3s SoC features a co-packaged DDR2 DRAM chip, which needs its
timing param.
Add support for it.
Signed-off-by: Icenowy Zheng <icenowy at aosc.xyz>
---
arch/arm/mach-sunxi/Kconfig | 10 ++++
arch/arm/mach-sunxi/dram_sunxi_dw.c | 2 +
arch/arm/mach-sunxi/dram_timings/Makefile | 1 +
arch/arm/mach-sunxi/dram_timings/ddr2_v3s.c | 84 +++++++++++++++++++++++++++++
4 files changed, 97 insertions(+)
create mode 100644 arch/arm/mach-sunxi/dram_timings/ddr2_v3s.c
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index 3e529470e7..1df24cfb39 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -220,6 +220,9 @@ if SUNXI_DRAM_DW
config SUNXI_DRAM_DDR3
bool
+config SUNXI_DRAM_DDR2
+ bool
+
choice
prompt "DRAM Type and Timing"
default SUNXI_DRAM_DDR3_1333
@@ -231,6 +234,13 @@ config SUNXI_DRAM_DDR3_1333
This option is the original only supported memory type, which suits
many H3/H5/A64 boards available now.
+config SUNXI_DRAM_DDR2_V3S
+ bool "DDR2 found in V3s chip"
+ select SUNXI_DRAM_DDR2
+ ---help---
+ This option is only for the DDR2 memory chip which is co-packaged in
+ Allwinner V3s SoC.
+
endchoice
endif
diff --git a/arch/arm/mach-sunxi/dram_sunxi_dw.c b/arch/arm/mach-sunxi/dram_sunxi_dw.c
index bd606ccc65..438b4740cd 100644
--- a/arch/arm/mach-sunxi/dram_sunxi_dw.c
+++ b/arch/arm/mach-sunxi/dram_sunxi_dw.c
@@ -340,6 +340,8 @@ static void mctl_set_cr(uint16_t socid, struct dram_para *para)
writel(MCTL_CR_BL8 | MCTL_CR_INTERLEAVED |
#if defined CONFIG_SUNXI_DRAM_DDR3
MCTL_CR_DDR3 | MCTL_CR_2T |
+#elif defined CONFIG_SUNXI_DRAM_DDR2
+ MCTL_CR_DDR2 | MCTL_CR_2T |
#else
#error Unsupported DRAM type!
#endif
diff --git a/arch/arm/mach-sunxi/dram_timings/Makefile b/arch/arm/mach-sunxi/dram_timings/Makefile
index 7e71c76a5c..a4c9dc556c 100644
--- a/arch/arm/mach-sunxi/dram_timings/Makefile
+++ b/arch/arm/mach-sunxi/dram_timings/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_SUNXI_DRAM_DDR3_1333) += ddr3_1333.o
+obj-$(CONFIG_SUNXI_DRAM_DDR2_V3S) += ddr2_v3s.o
diff --git a/arch/arm/mach-sunxi/dram_timings/ddr2_v3s.c b/arch/arm/mach-sunxi/dram_timings/ddr2_v3s.c
new file mode 100644
index 0000000000..9077f86a8b
--- /dev/null
+++ b/arch/arm/mach-sunxi/dram_timings/ddr2_v3s.c
@@ -0,0 +1,84 @@
+#include <common.h>
+#include <asm/arch/dram.h>
+#include <asm/arch/cpu.h>
+
+void mctl_set_timing_params(uint16_t socid, struct dram_para *para)
+{
+ struct sunxi_mctl_ctl_reg * const mctl_ctl =
+ (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
+
+ u8 tccd = 1;
+ u8 tfaw = ns_to_t(50);
+ u8 trrd = max(ns_to_t(10), 2);
+ u8 trcd = ns_to_t(20);
+ u8 trc = ns_to_t(65);
+ u8 txp = 2;
+ u8 twtr = max(ns_to_t(8), 2);
+ u8 trtp = max(ns_to_t(8), 2);
+ u8 twr = max(ns_to_t(15), 3);
+ u8 trp = ns_to_t(15);
+ u8 tras = ns_to_t(45);
+ u16 trefi = ns_to_t(7800) / 32;
+ u16 trfc = ns_to_t(328);
+
+ u8 tmrw = 0;
+ u8 tmrd = 2;
+ u8 tmod = 12;
+ u8 tcke = 3;
+ u8 tcksrx = 5;
+ u8 tcksre = 5;
+ u8 tckesr = 4;
+ u8 trasmax = 27;
+
+ u8 tcl = 3; /* CL 6 */
+ u8 tcwl = 3; /* CWL 6 */
+ u8 t_rdata_en = 1;
+ u8 wr_latency = 1;
+
+ u32 tdinit0 = (400 * CONFIG_DRAM_CLK) + 1; /* 400us */
+ u32 tdinit1 = (500 * CONFIG_DRAM_CLK) / 1000 + 1; /* 500ns */
+ u32 tdinit2 = (200 * CONFIG_DRAM_CLK) + 1; /* 200us */
+ u32 tdinit3 = (1 * CONFIG_DRAM_CLK) + 1; /* 1us */
+
+ u8 twtp = tcwl + 2 + twr; /* WL + BL / 2 + tWR */
+ u8 twr2rd = tcwl + 2 + twtr; /* WL + BL / 2 + tWTR */
+ u8 trd2wr = tcl + 2 + 1 - tcwl; /* RL + BL / 2 + 2 - WL */
+
+ /* set mode register */
+ writel(0x263, &mctl_ctl->mr[0]);
+ writel(0x4, &mctl_ctl->mr[1]);
+ writel(0x0, &mctl_ctl->mr[2]);
+ writel(0x0, &mctl_ctl->mr[3]);
+
+ /* set DRAM timing */
+ writel(DRAMTMG0_TWTP(twtp) | DRAMTMG0_TFAW(tfaw) |
+ DRAMTMG0_TRAS_MAX(trasmax) | DRAMTMG0_TRAS(tras),
+ &mctl_ctl->dramtmg[0]);
+ writel(DRAMTMG1_TXP(txp) | DRAMTMG1_TRTP(trtp) | DRAMTMG1_TRC(trc),
+ &mctl_ctl->dramtmg[1]);
+ writel(DRAMTMG2_TCWL(tcwl) | DRAMTMG2_TCL(tcl) |
+ DRAMTMG2_TRD2WR(trd2wr) | DRAMTMG2_TWR2RD(twr2rd),
+ &mctl_ctl->dramtmg[2]);
+ writel(DRAMTMG3_TMRW(tmrw) | DRAMTMG3_TMRD(tmrd) | DRAMTMG3_TMOD(tmod),
+ &mctl_ctl->dramtmg[3]);
+ writel(DRAMTMG4_TRCD(trcd) | DRAMTMG4_TCCD(tccd) | DRAMTMG4_TRRD(trrd) |
+ DRAMTMG4_TRP(trp), &mctl_ctl->dramtmg[4]);
+ writel(DRAMTMG5_TCKSRX(tcksrx) | DRAMTMG5_TCKSRE(tcksre) |
+ DRAMTMG5_TCKESR(tckesr) | DRAMTMG5_TCKE(tcke),
+ &mctl_ctl->dramtmg[5]);
+
+ /* set two rank timing */
+ clrsetbits_le32(&mctl_ctl->dramtmg[8], (0xff << 8) | (0xff << 0),
+ (0x66 << 8) | (0x10 << 0));
+
+ /* set PHY interface timing, write latency and read latency configure */
+ writel((0x2 << 24) | (t_rdata_en << 16) | (0x1 << 8) |
+ (wr_latency << 0), &mctl_ctl->pitmg[0]);
+
+ /* set PHY timing, PTR0-2 use default */
+ writel(PTR3_TDINIT0(tdinit0) | PTR3_TDINIT1(tdinit1), &mctl_ctl->ptr[3]);
+ writel(PTR4_TDINIT2(tdinit2) | PTR4_TDINIT3(tdinit3), &mctl_ctl->ptr[4]);
+
+ /* set refresh timing */
+ writel(RFSHTMG_TREFI(trefi) | RFSHTMG_TRFC(trfc), &mctl_ctl->rfshtmg);
+}
--
2.12.2