sunxi: H616: add LPDDR3 DRAM support
The H616 SoC has support for several types of DRAM: DDR3, LPDDR3,
DDR4 and LPDDR4.
At the moment, the driver only supports DDR3 memory.
Let's extend the driver to support the LPDDR3 memory. All "magic"
values obtained from the boot0.
Signed-off-by: Mikhail Kalashnikov <iuncuim@gmail.com>
Acked-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c b/arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c
new file mode 100644
index 0000000..b6d6a68
--- /dev/null
+++ b/arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c
@@ -0,0 +1,95 @@
+/*
+ * sun50i H616 LPDDR3 timings, as programmed by Allwinner's boot0
+ *
+ * The chips are probably able to be driven by a faster clock, but boot0
+ * uses a more conservative timing (as usual).
+ *
+ * (C) Copyright 2020 Jernej Skrabec <jernej.skrabec@siol.net>
+ * Based on H6 DDR3 timings:
+ * (C) Copyright 2018,2019 Arm Ltd.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/dram.h>
+#include <asm/arch/cpu.h>
+
+void mctl_set_timing_params(const struct dram_para *para)
+{
+ struct sunxi_mctl_ctl_reg * const mctl_ctl =
+ (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
+
+ u8 tccd = 2;
+ u8 tfaw = ns_to_t(50);
+ u8 trrd = max(ns_to_t(6), 4);
+ u8 trcd = ns_to_t(24);
+ u8 trc = ns_to_t(70);
+ u8 txp = max(ns_to_t(8), 3);
+ u8 trtp = max(ns_to_t(8), 2);
+ u8 trp = ns_to_t(27);
+ u8 tras = ns_to_t(41);
+ u16 trefi = ns_to_t(7800) / 64;
+ u16 trfc = ns_to_t(210);
+ u16 txsr = 88;
+
+ u8 tmrw = 5;
+ u8 tmrd = 5;
+ u8 tmod = max(ns_to_t(15), 12);
+ u8 tcke = max(ns_to_t(6), 3);
+ u8 tcksrx = max(ns_to_t(12), 4);
+ u8 tcksre = max(ns_to_t(12), 4);
+ u8 tckesr = tcke + 2;
+ u8 trasmax = (para->clk / 2) / 16;
+ u8 txs = ns_to_t(360) / 32;
+ u8 txsdll = 16;
+ u8 txsabort = 4;
+ u8 txsfast = 4;
+ u8 tcl = 7;
+ u8 tcwl = 4;
+ u8 t_rdata_en = 12;
+ u8 t_wr_lat = 6;
+
+ u8 twtp = 16;
+ u8 twr2rd = trtp + 9;
+ u8 trd2wr = 13;
+
+ /* DRAM timing grabbed from tvbox with LPDDR3 memory */
+ writel((twtp << 24) | (tfaw << 16) | (trasmax << 8) | tras,
+ &mctl_ctl->dramtmg[0]);
+ writel((txp << 16) | (trtp << 8) | trc, &mctl_ctl->dramtmg[1]);
+ writel((tcwl << 24) | (tcl << 16) | (trd2wr << 8) | twr2rd,
+ &mctl_ctl->dramtmg[2]);
+ writel((tmrw << 20) | (tmrd << 12) | tmod, &mctl_ctl->dramtmg[3]);
+ writel((trcd << 24) | (tccd << 16) | (trrd << 8) | trp,
+ &mctl_ctl->dramtmg[4]);
+ writel((tcksrx << 24) | (tcksre << 16) | (tckesr << 8) | tcke,
+ &mctl_ctl->dramtmg[5]);
+ /* Value suggested by ZynqMP manual and used by libdram */
+ writel((txp + 2) | 0x02020000, &mctl_ctl->dramtmg[6]);
+ writel((txsfast << 24) | (txsabort << 16) | (txsdll << 8) | txs,
+ &mctl_ctl->dramtmg[8]);
+ writel(0x00020208, &mctl_ctl->dramtmg[9]);
+ writel(0xE0C05, &mctl_ctl->dramtmg[10]);
+ writel(0x440C021C, &mctl_ctl->dramtmg[11]);
+ writel(8, &mctl_ctl->dramtmg[12]);
+ writel(0xA100002, &mctl_ctl->dramtmg[13]);
+ writel(txsr, &mctl_ctl->dramtmg[14]);
+
+ writel(0x4f0112, &mctl_ctl->init[0]);
+ writel(0x420000, &mctl_ctl->init[1]);
+ writel(0xd05, &mctl_ctl->init[2]);
+ writel(0x83001c, &mctl_ctl->init[3]);
+ writel(0x00010000, &mctl_ctl->init[4]);
+
+ writel(0, &mctl_ctl->dfimisc);
+ clrsetbits_le32(&mctl_ctl->rankctl, 0xff0, 0x660);
+
+ /* Configure DFI timing */
+ writel(t_wr_lat | 0x2000000 | (t_rdata_en << 16) | 0x808000,
+ &mctl_ctl->dfitmg0);
+ writel(0x100202, &mctl_ctl->dfitmg1);
+
+ /* set refresh timing */
+ writel((trefi << 16) | trfc, &mctl_ctl->rfshtmg);
+}