Re: [PATCH v2 1/1] sunxi: H616: add LPDDR4 DRAM support

On Monday, October 16, 2023 7:34:41 AM CEST Mikhail Kalashnikov wrote:

From: iuncuim iuncuim@gmail.com

The H616 SoC family has support for several types of DRAM: DDR3, LPDDR3, DDR4 and LPDDR4. At the moment, the driver only supports DDR3 and LPDDR3 memory. Let's extend the driver to support the LPDDR4 memory. This type of memory widely used in device with T507(-H) SoC and new orangepi zero3 with H618. The compatibility with T507 is not yet complete, because there is difference in the phy_init array. The LPDDR4-2133 timings correspond to DRAM Rayson RS1G32LO4D2BDS-53BT found on the Orangepi Zero 3 4GB.

Signed-off-by: Mikhail Kalashnikov iuncuim@gmail.com

---

.../include/asm/arch-sunxi/dram_sun50i_h616.h | 2 + arch/arm/mach-sunxi/Kconfig | 16 ++ arch/arm/mach-sunxi/dram_sun50i_h616.c | 176 ++++++++++++++---- arch/arm/mach-sunxi/dram_timings/Makefile | 1 + .../dram_timings/h616_lpddr4_2133.c | 97 ++++++++++ 5 files changed, 258 insertions(+), 34 deletions(-) create mode 100644 arch/arm/mach-sunxi/dram_timings/h616_lpddr4_2133.c

diff --git a/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h b/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h index 11774deded..a8fdda124a 100644 --- a/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h +++ b/arch/arm/include/asm/arch-sunxi/dram_sun50i_h616.h @@ -130,6 +130,7 @@ check_member(sunxi_mctl_ctl_reg, unk_0x4240, 0x4240); #define MSTR_DEVICETYPE_LPDDR2 BIT(2) #define MSTR_DEVICETYPE_LPDDR3 BIT(3) #define MSTR_DEVICETYPE_DDR4 BIT(4) +#define MSTR_DEVICETYPE_LPDDR4 BIT(5) #define MSTR_DEVICETYPE_MASK GENMASK(5, 0) #define MSTR_2TMODE BIT(10) #define MSTR_BUSWIDTH_FULL (0 << 12) @@ -154,6 +155,7 @@ struct dram_para { u32 odt_en; u32 tpr0; u32 tpr2;

• u32 tpr6; u32 tpr10; u32 tpr11; u32 tpr12;

diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 9d5df2c102..71e2f40b9e 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -85,6 +85,11 @@ config DRAM_SUN50I_H616_TPR2 help TPR2 value from vendor DRAM settings.

+config DRAM_SUN50I_H616_TPR6

• hex "H616 DRAM TPR6 parameter"
• help

•  TPR6 value from vendor DRAM settings.
  

config DRAM_SUN50I_H616_TPR10 hex "H616 DRAM TPR10 parameter" help @@ -441,6 +446,9 @@ config SUNXI_DRAM_DDR2 config SUNXI_DRAM_LPDDR3 bool

+config SUNXI_DRAM_LPDDR4

• bool

choice prompt "DRAM Type and Timing" default SUNXI_DRAM_DDR3_1333 if !MACH_SUN8I_V3S @@ -484,6 +492,14 @@ config SUNXI_DRAM_H616_LPDDR3 This option is the LPDDR3 timing used by the stock boot0 by Allwinner.

+config SUNXI_DRAM_H616_LPDDR4

• bool "LPDDR4 DRAM chips on the H616 DRAM controller"
• select SUNXI_DRAM_LPDDR4
• depends on DRAM_SUN50I_H616
• help

•  This option is the LPDDR4 timing used by the stock boot0 by
  

•  Allwinner.
  

config SUNXI_DRAM_H616_DDR3_1333 bool "DDR3-1333 boot0 timings on the H616 DRAM controller" select SUNXI_DRAM_DDR3 diff --git a/arch/arm/mach-sunxi/dram_sun50i_h616.c b/arch/arm/mach-sunxi/dram_sun50i_h616.c index ba5659d409..2c4b47bae7 100644 --- a/arch/arm/mach-sunxi/dram_sun50i_h616.c +++ b/arch/arm/mach-sunxi/dram_sun50i_h616.c @@ -238,6 +238,11 @@ static const u8 phy_init[] = { 0x08, 0x01, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x07, 0x17, 0x19, 0x1a +#elif defined(CONFIG_SUNXI_DRAM_H616_LPDDR4)

• 0x02, 0x00, 0x17, 0x05, 0x04, 0x19, 0x06, 0x07,
• 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
• 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x01,
• 0x18, 0x03, 0x1a

#endif };

@@ -246,8 +251,13 @@ static void mctl_phy_configure_odt(const struct dram_para *para) { uint32_t val_lo, val_hi;

• clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 0x390, BIT(5), BIT(4));
• clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 0x3d0, BIT(5), BIT(4));
• clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 0x410, BIT(5), BIT(4));
• clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 0x450, BIT(5), BIT(4));
• val_lo = para->dx_dri;

• val_hi = para->dx_dri;

• val_hi = (para->type == SUNXI_DRAM_TYPE_LPDDR4) ? 0x04040404 :

para->dx_dri; writel_relaxed(MASK_BYTE(val_lo, 0), SUNXI_DRAM_PHY0_BASE + 0x388); writel_relaxed(MASK_BYTE(val_hi, 0), SUNXI_DRAM_PHY0_BASE + 0x38c); writel_relaxed(MASK_BYTE(val_lo, 1), SUNXI_DRAM_PHY0_BASE + 0x3c8); @@ -265,7 +275,7 @@ static void mctl_phy_configure_odt(const struct dram_para *para) writel_relaxed(MASK_BYTE(val_hi, 1), SUNXI_DRAM_PHY0_BASE + 0x34c);

val_lo = (para->type == SUNXI_DRAM_TYPE_LPDDR3) ? 0 : para- dx_odt;

• val_hi = para->dx_odt;

• val_hi = (para->type == SUNXI_DRAM_TYPE_LPDDR4) ? 0 : para->dx_odt; writel_relaxed(MASK_BYTE(val_lo, 0), SUNXI_DRAM_PHY0_BASE +

0x380);

writel_relaxed(MASK_BYTE(val_hi, 0), SUNXI_DRAM_PHY0_BASE +

0x384);

writel_relaxed(MASK_BYTE(val_lo, 1), SUNXI_DRAM_PHY0_BASE +

0x3c0);

@@ -791,8 +801,9 @@ static void mctl_phy_ca_bit_delay_compensation(const struct dram_para *para, writel(val, SUNXI_DRAM_PHY0_BASE + 0x7e0); writel(val, SUNXI_DRAM_PHY0_BASE + 0x7f4);

• if (para->type == SUNXI_DRAM_TYPE_DDR3) {

• val = (para->tpr10 >> 7) & 0x1e;
  

• val = (para->tpr10 >> 7) & 0x1e;
• switch (para->type) {
• case SUNXI_DRAM_TYPE_DDR3: if (para->tpr2 & 1) { writel(val, SUNXI_DRAM_PHY0_BASE + 0x794); if (config->ranks == 2) {

@@ -818,8 +829,8 @@ static void mctl_phy_ca_bit_delay_compensation(const struct dram_para *para, writel(val, SUNXI_DRAM_PHY0_BASE + 0x7b8); } }

• } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {

• val = (para->tpr10 >> 7) & 0x1e;
  

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR3: if (para->tpr2 & 1) { writel(val, SUNXI_DRAM_PHY0_BASE + 0x7a0); if (config->ranks == 2) {

@@ -833,7 +844,15 @@ static void mctl_phy_ca_bit_delay_compensation(const struct dram_para *para, writel(val, SUNXI_DRAM_PHY0_BASE + 0x7f8); } }

• }

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR4:

• if (para->tpr2 & 1) {
  

• 	writel(val, SUNXI_DRAM_PHY0_BASE + 0x788);
  

• } else {
  

• 	writel(val, SUNXI_DRAM_PHY0_BASE + 0x794);
  

• };
  

• break;
  

• };

}

static bool mctl_phy_init(const struct dram_para *para, @@ -846,30 +865,39 @@ static bool mctl_phy_init(const struct dram_para *para, u32 val, val2, *ptr, mr0, mr2; int i;

• if (para->type == SUNXI_DRAM_TYPE_LPDDR4)

• clrbits_le32(SUNXI_DRAM_PHY0_BASE + 0x4,0x80);
  

• if (config->bus_full_width) val = 0xf; else val = 3; clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 0x3c, 0xf, val);

• if (para->tpr2 & 0x100) {

• if (para->type == SUNXI_DRAM_TYPE_DDR3) {
  

• switch (para->type) {
• case SUNXI_DRAM_TYPE_DDR3:

• if (para->tpr2 & 0x100) {
  val = 9;
  val2 = 7;
  

• } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {
  

• 	// untested setup: use some values for now
  

• 	val = 14;
  

• 	val2 = 8;
  

• }
  

• } else {

• if (para->type == SUNXI_DRAM_TYPE_DDR3) {
  

• } else {
  val = 13;
  val2 = 9;
  

• } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {
  

• }
  

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR3:

• if (para->tpr2 & 0x100) {
  

• 	val = 12;
  

• 	val2 = 6;
  

• } else {
  val = 14;
  val2 = 8;
  

  }

• }

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR4:

• val = 20;
  

• val2 = 10;
  

• break;
  

• };

  writel(val, SUNXI_DRAM_PHY0_BASE + 0x14); writel(val, SUNXI_DRAM_PHY0_BASE + 0x35c);

@@ -893,19 +921,37 @@ static bool mctl_phy_init(const struct dram_para *para, if (para->tpr10 & TPR10_CA_BIT_DELAY) mctl_phy_ca_bit_delay_compensation(para, config);

• if (para->type == SUNXI_DRAM_TYPE_DDR3)

• switch (para->type) {
• case SUNXI_DRAM_TYPE_DDR3:

• val = para->tpr6 & 0xff;
  

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR3:

• val = para->tpr6 >> 8 & 0xff;
  

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR4:

• val = para->tpr6 >> 24 & 0xff;
  

• if (val == 0)
  

• 	val = 0x33;
  

• break;
  

• };
• if (val == 0) val = 0x80;

• else if (para->type == SUNXI_DRAM_TYPE_LPDDR3)

• val = 0xc0;
  

  writel(val, SUNXI_DRAM_PHY0_BASE + 0x3dc); writel(val, SUNXI_DRAM_PHY0_BASE + 0x45c);

  mctl_phy_configure_odt(para);

• if (para->type == SUNXI_DRAM_TYPE_DDR3)

• switch (para->type) {
• case SUNXI_DRAM_TYPE_DDR3: val = 0x0a;

• else if (para->type == SUNXI_DRAM_TYPE_LPDDR3)

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR3: val = 0x0b;

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR4:

• val = 0x0d;
  

• break;
  

• }; clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 4, 0x7, val);

  if (para->clk <= 672)

@@ -955,8 +1001,8 @@ static bool mctl_phy_init(const struct dram_para *para, mr0 = 0x1f14; mr2 = 0x20; }

• if (para->type == SUNXI_DRAM_TYPE_DDR3) {

• switch (para->type) {
• case SUNXI_DRAM_TYPE_DDR3: writel(mr0, &mctl_ctl->mrctrl1); writel(0x80000030, &mctl_ctl->mrctrl0); mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);

@@ -972,7 +1018,8 @@ static bool mctl_phy_init(const struct dram_para *para, writel(0, &mctl_ctl->mrctrl1); writel(0x80003030, &mctl_ctl->mrctrl0); mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);

• } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR3: writel(mr0, &mctl_ctl->mrctrl1); writel(0x800000f0, &mctl_ctl->mrctrl0); mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);

@@ -988,7 +1035,45 @@ static bool mctl_phy_init(const struct dram_para *para, writel(0x301, &mctl_ctl->mrctrl1); writel(0x800000f0, &mctl_ctl->mrctrl0); mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);

• }

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR4:

• writel(0x0, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0x134, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0x21b, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0x333, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0x403, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0xb04, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0xc72, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0xe09, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• writel(0x1624, &mctl_ctl->mrctrl1);
  

• writel(0x80000030, &mctl_ctl->mrctrl0);
  

• mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
  

• break;
  

• };

  writel(0, SUNXI_DRAM_PHY0_BASE + 0x54);

@@ -1055,6 +1140,9 @@ static bool mctl_ctrl_init(const struct dram_para *para, clrsetbits_le32(&mctl_com->unk_0x500, BIT(24), 0x200); writel(0x8000, &mctl_ctl->clken);

• if (para->type == SUNXI_DRAM_TYPE_LPDDR4)

• writel(1, SUNXI_DRAM_COM_BASE + 0x50);
  

• setbits_le32(&mctl_com->unk_0x008, 0xff00);

  clrsetbits_le32(&mctl_ctl->sched[0], 0xff00, 0x3000);

@@ -1063,11 +1151,18 @@ static bool mctl_ctrl_init(const struct dram_para *para,

setbits_le32(&mctl_com->unk_0x008, 0xff00);

• reg_val = MSTR_BURST_LENGTH(8) | MSTR_ACTIVE_RANKS(config->ranks);
• if (para->type == SUNXI_DRAM_TYPE_DDR3)

• reg_val |= MSTR_DEVICETYPE_DDR3 | MSTR_2TMODE;
  

• else if (para->type == SUNXI_DRAM_TYPE_LPDDR3)

• reg_val |= MSTR_DEVICETYPE_LPDDR3;
  

• reg_val = MSTR_ACTIVE_RANKS(config->ranks);
• switch (para->type) {
• case SUNXI_DRAM_TYPE_DDR3:

• reg_val |= MSTR_BURST_LENGTH(8) | MSTR_DEVICETYPE_DDR3 | 
  

MSTR_2TMODE;

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR3:

• reg_val |= MSTR_BURST_LENGTH(8) | 
  

MSTR_DEVICETYPE_LPDDR3;

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR4:

• reg_val |= MSTR_BURST_LENGTH(16) | 
  

MSTR_DEVICETYPE_LPDDR4;

• break;
  

• }; if (config->bus_full_width) reg_val |= MSTR_BUSWIDTH_FULL; else

@@ -1079,10 +1174,17 @@ static bool mctl_ctrl_init(const struct dram_para *para, else writel(0x0201, &mctl_ctl->odtmap);

• if (para->type == SUNXI_DRAM_TYPE_DDR3)

• switch (para->type) {
• case SUNXI_DRAM_TYPE_DDR3: reg_val = 0x06000400;

• else if (para->type == SUNXI_DRAM_TYPE_LPDDR3)

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR3: reg_val = 0x09020400;

• break;
  

• case SUNXI_DRAM_TYPE_LPDDR4:

• reg_val = 0x04000400;
  

• break;
  

• }; writel(reg_val, &mctl_ctl->odtcfg); writel(reg_val, &mctl_ctl->unk_0x2240); writel(reg_val, &mctl_ctl->unk_0x3240);

@@ -1102,6 +1204,9 @@ static bool mctl_ctrl_init(const struct dram_para *para, setbits_le32(&mctl_ctl->unk_0x3180, BIT(31) | BIT(30)); setbits_le32(&mctl_ctl->unk_0x4180, BIT(31) | BIT(30));

• if (para->type == SUNXI_DRAM_TYPE_LPDDR4)

• setbits_le32(&mctl_ctl->dbictl, 0x1);
  

• setbits_le32(&mctl_ctl->rfshctl3, BIT(0)); clrbits_le32(&mctl_ctl->dfimisc, BIT(0));

@@ -1224,6 +1329,8 @@ static const struct dram_para para = { .type = SUNXI_DRAM_TYPE_DDR3, #elif defined(CONFIG_SUNXI_DRAM_H616_LPDDR3) .type = SUNXI_DRAM_TYPE_LPDDR3, +#elif defined(CONFIG_SUNXI_DRAM_H616_LPDDR4)

• .type = SUNXI_DRAM_TYPE_LPDDR4,

#endif .dx_odt = CONFIG_DRAM_SUN50I_H616_DX_ODT, .dx_dri = CONFIG_DRAM_SUN50I_H616_DX_DRI, @@ -1231,6 +1338,7 @@ static const struct dram_para para = { .odt_en = CONFIG_DRAM_SUN50I_H616_ODT_EN, .tpr0 = CONFIG_DRAM_SUN50I_H616_TPR0, .tpr2 = CONFIG_DRAM_SUN50I_H616_TPR2,

• .tpr6 = CONFIG_DRAM_SUN50I_H616_TPR6, .tpr10 = CONFIG_DRAM_SUN50I_H616_TPR10, .tpr11 = CONFIG_DRAM_SUN50I_H616_TPR11, .tpr12 = CONFIG_DRAM_SUN50I_H616_TPR12,

diff --git a/arch/arm/mach-sunxi/dram_timings/Makefile b/arch/arm/mach-sunxi/dram_timings/Makefile index 8bfd99448a..5f20341924 100644 --- a/arch/arm/mach-sunxi/dram_timings/Makefile +++ b/arch/arm/mach-sunxi/dram_timings/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_SUNXI_DRAM_H6_LPDDR3) += h6_lpddr3.o obj-$(CONFIG_SUNXI_DRAM_H6_DDR3_1333) += h6_ddr3_1333.o obj-$(CONFIG_SUNXI_DRAM_H616_DDR3_1333) += h616_ddr3_1333.o obj-$(CONFIG_SUNXI_DRAM_H616_LPDDR3) += h616_lpddr3.o +obj-$(CONFIG_SUNXI_DRAM_H616_LPDDR4) += h616_lpddr4_2133.o diff --git a/arch/arm/mach-sunxi/dram_timings/h616_lpddr4_2133.c b/arch/arm/mach-sunxi/dram_timings/h616_lpddr4_2133.c new file mode 100644 index 0000000000..cfb938af12 --- /dev/null +++ b/arch/arm/mach-sunxi/dram_timings/h616_lpddr4_2133.c @@ -0,0 +1,97 @@ +/*

• • sun50i H616 LPDDR4-2133 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

Mikhail, I think your copyrights should be here, as I'm not the author.

Maybe also those comments about boot0 can be removed? Or did you do timing analysis?

Best regards, Jernej

• • 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 = 4; /* JEDEC:

4nCK */

• u8 tfaw = ns_to_t(40); /*

JEDEC: 40 ns w/ 1K pages */

• u8 trrd = max(ns_to_t(10), 2); /* JEDEC: max(10

ns, 2nCK) */

• u8 trcd = max(ns_to_t(18), 2); /* JEDEC: 13.5 ns

*/

• u8 trc = ns_to_t(65); /*

JEDEC: 49.5 ns */

• u8 txp = max(ns_to_t(8), 2); /* JEDEC: max(6

ns, 3nCK) */

• u8 trtp = max(ns_to_t(8), 4); /* JEDEC: max(7.5

ns, 4nCK) */

• u8 trp = ns_to_t(21); /*

JEDEC: >= 13.75 ns */

• u8 tras = ns_to_t(42); /* JEDEC

= 36 ns, <= 9*trefi */

• u16 trefi = ns_to_t(3904) / 32; /* JEDEC: 7.8us@Tcase <= 85C

*/

• u16 trfc = ns_to_t(280); /* JEDEC: 160 ns

for 2Gb */

• u16 txsr = ns_to_t(190); /* ? */
• u8 tmrw = max(ns_to_t(14), 5); /* ? */
• u8 tmrd = tmrw; /* JEDEC:

4nCK */

• u8 tmod = 12; /* JEDEC:

max(15 ns, 12nCK) */

• u8 tcke = max(ns_to_t(15), 2); /* JEDEC:

max(5.625 ns, 3nCK) */

• u8 tcksrx = max(ns_to_t(2), 2); /* JEDEC: max(10 ns, 5nCK) */
• u8 tcksre = max(ns_to_t(5), 2); /* JEDEC: max(10 ns, 5nCK) */
• u8 tckesr = tcke; /* JEDEC: tCKE(min) + 1nCK */
• u8 trasmax = (trefi * 9) / 32; /* JEDEC: tREFI * 9 */
• u8 txs = 4; /* JEDEC:

max(5nCK,tRFC+10ns) */

• u8 txsdll = 16; /* JEDEC: 512 nCK */
• u8 txsabort = 4; /* ? */
• u8 txsfast = 4; /* ? */
• u8 tcl = 10; /* JEDEC:

CL / 2 => 6 */

• u8 tcwl = 5; /* JEDEC:

8 */

• u8 t_rdata_en = 17; /* ? */
• u8 tphy_wrlat = 5;
• u8 twtp = 24; /* (WL + BL

/ 2 + tWR) / 2 */

• u8 twr2rd = max(trrd, (u8)4) + 14;/* (WL + BL / 2 + tWTR) / 2 */
• u8 trd2wr = (ns_to_t(4) + 17) - ns_to_t(1);/* (RL + BL / 2 + 2 -

WL) / 2

*/ +

• /* set DRAM timing */
• 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]);
• clrsetbits_le32(&mctl_ctl->init[0], 0xC0000FFF, 0x3f0);
• writel(0x01f20000, &mctl_ctl->init[1]);
• writel(0x00000d05, &mctl_ctl->init[2]);
• writel(0, &mctl_ctl->dfimisc);
• writel(0x0034001b, &mctl_ctl->init[3]);
• writel(0x00330000, &mctl_ctl->init[4]);
• writel(0x00040072, &mctl_ctl->init[6]);
• writel(0x00240009, &mctl_ctl->init[7]);
• clrsetbits_le32(&mctl_ctl->rankctl, 0xff0, 0x660);
• /* Configure DFI timing */
• writel(tphy_wrlat | 0x2000000 | (t_rdata_en << 16) | 0x808000,

•       &mctl_ctl->dfitmg0);
  

• writel(0x100202, &mctl_ctl->dfitmg1);
• /* set refresh timing */
• writel((trefi << 16) | trfc, &mctl_ctl->rfshtmg);

+} \ No newline at end of file