[PATCH 5/5] sunxi: H616: add LPDDR3 DRAM support
Jernej Škrabec
jernej.skrabec at gmail.com
Fri Jun 9 22:38:38 CEST 2023
Dne sreda, 07. junij 2023 ob 02:07:45 CEST je Andre Przywara napisal(a):
> From: iuncuim <iuncuim at gmail.com>
>
> 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.
> ---
> arch/arm/mach-sunxi/Kconfig | 8 +
> arch/arm/mach-sunxi/dram_sun50i_h616.c | 193 +++++++++++++-----
> arch/arm/mach-sunxi/dram_timings/Makefile | 1 +
> .../arm/mach-sunxi/dram_timings/h616_lpddr3.c | 95 +++++++++
> 4 files changed, 242 insertions(+), 55 deletions(-)
> create mode 100644 arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c
>
> diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
> index 197d77ea658..5ce82a955c6 100644
> --- a/arch/arm/mach-sunxi/Kconfig
> +++ b/arch/arm/mach-sunxi/Kconfig
> @@ -487,6 +487,14 @@ config SUNXI_DRAM_H6_DDR3_1333
> This option is the DDR3 timing used by the boot0 on H6 TV boxes
> which use a DDR3-1333 timing.
>
> +config SUNXI_DRAM_H616_LPDDR3
> + bool "LPDDR3 DRAM chips on the H616 DRAM controller"
> + select SUNXI_DRAM_LPDDR3
> + depends on DRAM_SUN50I_H616
> + ---help---
> + This option is the LPDDR3 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 4e988cebf59..082746ea7f3 100644
> --- a/arch/arm/mach-sunxi/dram_sun50i_h616.c
> +++ b/arch/arm/mach-sunxi/dram_sun50i_h616.c
> @@ -228,10 +228,17 @@ static void mctl_set_addrmap(const struct dram_config *config)
> }
>
> static const u8 phy_init[] = {
> +#ifdef CONFIG_SUNXI_DRAM_H616_DDR3_1333
> 0x07, 0x0b, 0x02, 0x16, 0x0d, 0x0e, 0x14, 0x19,
> 0x0a, 0x15, 0x03, 0x13, 0x04, 0x0c, 0x10, 0x06,
> 0x0f, 0x11, 0x1a, 0x01, 0x12, 0x17, 0x00, 0x08,
> 0x09, 0x05, 0x18
> +#elif defined(CONFIG_SUNXI_DRAM_H616_LPDDR3)
> + 0x18, 0x06, 0x00, 0x05, 0x04, 0x03, 0x09, 0x02,
> + 0x08, 0x01, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
> + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x07,
> + 0x17, 0x19, 0x1a
> +#endif
> };
>
> static void mctl_phy_configure_odt(const struct dram_para *para)
> @@ -263,19 +270,31 @@ static void mctl_phy_configure_odt(const struct dram_para *para)
> writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x34c);
>
> val = para->dx_odt & 0x1f;
> - writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x380);
> + if (para->type == SUNXI_DRAM_TYPE_LPDDR3)
> + writel_relaxed(0, SUNXI_DRAM_PHY0_BASE + 0x380);
> + else
> + writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x380);
> writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x384);
>
> val = (para->dx_odt >> 8) & 0x1f;
> - writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x3c0);
> + if (para->type == SUNXI_DRAM_TYPE_LPDDR3)
> + writel_relaxed(0, SUNXI_DRAM_PHY0_BASE + 0x3c0);
> + else
> + writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x3c0);
> writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x3c4);
>
> val = (para->dx_odt >> 16) & 0x1f;
> - writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x400);
> + if (para->type == SUNXI_DRAM_TYPE_LPDDR3)
> + writel_relaxed(0, SUNXI_DRAM_PHY0_BASE + 0x400);
> + else
> + writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x400);
> writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x404);
>
> val = (para->dx_odt >> 24) & 0x1f;
> - writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x440);
> + if (para->type == SUNXI_DRAM_TYPE_LPDDR3)
> + writel_relaxed(0, SUNXI_DRAM_PHY0_BASE + 0x440);
> + else
> + writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x440);
> writel_relaxed(val, SUNXI_DRAM_PHY0_BASE + 0x444);
Above dx_odt oriented changes are not needed. They depend on Kconfig symbol,
which can simply be set to 0.
I didn't do detailed check, but if it works, it should be ok. Were calculated
values here compared to vendor driver?
Best regards,
Jernej
>
> dmb();
> @@ -794,31 +813,47 @@ 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);
>
> - /* following configuration is DDR3 specific */
> - val = (para->tpr10 >> 7) & 0x1e;
> - if (para->tpr2 & 1) {
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x794);
> - if (config->ranks == 2) {
> - val = (para->tpr10 >> 11) & 0x1e;
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x7e4);
> - }
> - if (para->tpr0 & BIT(31)) {
> - val = (para->tpr0 << 1) & 0x3e;
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x790);
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x7b8);
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x7cc);
> - }
> - } else {
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x7d4);
> - if (config->ranks == 2) {
> - val = (para->tpr10 >> 11) & 0x1e;
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x79c);
> + if (para->type == SUNXI_DRAM_TYPE_DDR3) {
> + val = (para->tpr10 >> 7) & 0x1e;
> + if (para->tpr2 & 1) {
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x794);
> + if (config->ranks == 2) {
> + val = (para->tpr10 >> 11) & 0x1e;
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7e4);
> + }
> + if (para->tpr0 & BIT(31)) {
> + val = (para->tpr0 << 1) & 0x3e;
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x790);
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7b8);
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7cc);
> + }
> + } else {
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7d4);
> + if (config->ranks == 2) {
> + val = (para->tpr10 >> 11) & 0x1e;
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x79c);
> + }
> + if (para->tpr0 & BIT(31)) {
> + val = (para->tpr0 << 1) & 0x3e;
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x78c);
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7a4);
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7b8);
> + }
> }
> - if (para->tpr0 & BIT(31)) {
> - val = (para->tpr0 << 1) & 0x3e;
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x78c);
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x7a4);
> - writel(val, SUNXI_DRAM_PHY0_BASE + 0x7b8);
> + } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {
> + val = (para->tpr10 >> 7) & 0x1e;
> + if (para->tpr2 & 1) {
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7a0);
> + if (config->ranks == 2) {
> + val = (para->tpr10 >> 11) & 0x1e;
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x79c);
> + }
> + } else {
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7e8);
> + if (config->ranks == 2) {
> + val = (para->tpr10 >> 11) & 0x1e;
> + writel(val, SUNXI_DRAM_PHY0_BASE + 0x7f8);
> + }
> }
> }
> }
> @@ -840,11 +875,22 @@ static bool mctl_phy_init(const struct dram_para *para,
> clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 0x3c, 0xf, val);
>
> if (para->tpr2 & 0x100) {
> - val = 9;
> - val2 = 7;
> + if (para->type == SUNXI_DRAM_TYPE_DDR3) {
> + val = 9;
> + val2 = 7;
> + } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {
> + // TODO: untested setup: use some values for now
I'm not fan of such todos.
> + val = 14;
> + val2 = 8;
> + }
> } else {
> - val = 13;
> - val2 = 9;
> + if (para->type == SUNXI_DRAM_TYPE_DDR3) {
> + val = 13;
> + val2 = 9;
> + } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {
> + val = 14;
> + val2 = 8;
> + }
> }
>
> writel(val, SUNXI_DRAM_PHY0_BASE + 0x14);
> @@ -869,12 +915,20 @@ 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);
>
> - writel(0x80, SUNXI_DRAM_PHY0_BASE + 0x3dc);
> - writel(0x80, SUNXI_DRAM_PHY0_BASE + 0x45c);
> + if (para->type == SUNXI_DRAM_TYPE_DDR3)
> + 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);
>
> - clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 4, 7, 0xa);
> + if (para->type == SUNXI_DRAM_TYPE_DDR3) {
> + clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 4, 7, 0xa);
> + } else if (para->type == SUNXI_DRAM_TYPE_LPDDR3) {
> + clrsetbits_le32(SUNXI_DRAM_PHY0_BASE + 4, 7, 0xb);
> + }
To be consistent code style wise, above block could be rewritten to set val
variable to either 0xa or 0xb and set block after that.
>
> if (para->clk <= 672)
> writel(0xf, SUNXI_DRAM_PHY0_BASE + 0x20);
> @@ -924,21 +978,39 @@ static bool mctl_phy_init(const struct dram_para *para,
> mr2 = 0x20;
> }
>
> - writel(mr0, &mctl_ctl->mrctrl1);
> - writel(0x80000030, &mctl_ctl->mrctrl0);
> - mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> -
> - writel(4, &mctl_ctl->mrctrl1);
> - writel(0x80001030, &mctl_ctl->mrctrl0);
> - mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> -
> - writel(mr2, &mctl_ctl->mrctrl1);
> - writel(0x80002030, &mctl_ctl->mrctrl0);
> - mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> -
> - writel(0, &mctl_ctl->mrctrl1);
> - writel(0x80003030, &mctl_ctl->mrctrl0);
> - mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> + if (para->type == SUNXI_DRAM_TYPE_DDR3) {
> + writel(mr0, &mctl_ctl->mrctrl1);
> + writel(0x80000030, &mctl_ctl->mrctrl0);
> + mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> +
> + writel(4, &mctl_ctl->mrctrl1);
> + writel(0x80001030, &mctl_ctl->mrctrl0);
> + mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> +
> + writel(mr2, &mctl_ctl->mrctrl1);
> + writel(0x80002030, &mctl_ctl->mrctrl0);
> + mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> +
> + 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) {
> + writel(mr0, &mctl_ctl->mrctrl1);
> + writel(0x800000f0, &mctl_ctl->mrctrl0);
> + mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> +
> + writel(4, &mctl_ctl->mrctrl1);
> + writel(0x800000f0, &mctl_ctl->mrctrl0);
> + mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> +
> + writel(mr2, &mctl_ctl->mrctrl1);
> + writel(0x800000f0, &mctl_ctl->mrctrl0);
> + mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> +
> + writel(0x301, &mctl_ctl->mrctrl1);
> + writel(0x800000f0, &mctl_ctl->mrctrl0);
> + mctl_await_completion(&mctl_ctl->mrctrl0, BIT(31), 0);
> + }
>
> writel(0, SUNXI_DRAM_PHY0_BASE + 0x54);
>
> @@ -1014,7 +1086,10 @@ 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);
> - reg_val |= MSTR_DEVICETYPE_DDR3 | MSTR_2TMODE;
> + 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;
> if (config->bus_full_width)
> reg_val |= MSTR_BUSWIDTH_FULL;
> else
> @@ -1026,10 +1101,14 @@ static bool mctl_ctrl_init(const struct dram_para *para,
> else
> writel(0x0201, &mctl_ctl->odtmap);
>
> - writel(0x06000400, &mctl_ctl->odtcfg);
> - writel(0x06000400, &mctl_ctl->unk_0x2240);
> - writel(0x06000400, &mctl_ctl->unk_0x3240);
> - writel(0x06000400, &mctl_ctl->unk_0x4240);
> + if (para->type == SUNXI_DRAM_TYPE_DDR3)
> + reg_val = 0x06000400;
> + else if (para->type == SUNXI_DRAM_TYPE_LPDDR3)
> + reg_val = 0x09020400;
> + writel(reg_val, &mctl_ctl->odtcfg);
> + writel(reg_val, &mctl_ctl->unk_0x2240);
> + writel(reg_val, &mctl_ctl->unk_0x3240);
> + writel(reg_val, &mctl_ctl->unk_0x4240);
>
> writel(BIT(31), &mctl_com->cr);
>
> @@ -1163,7 +1242,11 @@ static unsigned long mctl_calc_size(const struct dram_config *config)
>
> static const struct dram_para para = {
> .clk = CONFIG_DRAM_CLK,
> +#ifdef CONFIG_SUNXI_DRAM_H616_DDR3_1333
> .type = SUNXI_DRAM_TYPE_DDR3,
> +#elif defined(CONFIG_SUNXI_DRAM_H616_LPDDR3)
> + .type = SUNXI_DRAM_TYPE_LPDDR3,
> +#endif
> .dx_odt = CONFIG_DRAM_SUN50I_H616_DX_ODT,
> .dx_dri = CONFIG_DRAM_SUN50I_H616_DX_DRI,
> .ca_dri = CONFIG_DRAM_SUN50I_H616_CA_DRI,
> diff --git a/arch/arm/mach-sunxi/dram_timings/Makefile b/arch/arm/mach-sunxi/dram_timings/Makefile
> index 4d78c04c9ae..8bfd99448a8 100644
> --- a/arch/arm/mach-sunxi/dram_timings/Makefile
> +++ b/arch/arm/mach-sunxi/dram_timings/Makefile
> @@ -4,3 +4,4 @@ obj-$(CONFIG_SUNXI_DRAM_DDR2_V3S) += ddr2_v3s.o
> obj-$(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
> 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 00000000000..b6d6a687468
> --- /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 at 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);
> +}
>
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