diff options
Diffstat (limited to 'arch/arm/mach-sunxi/dram_timings/a523_lpddr4.c')
| -rw-r--r-- | arch/arm/mach-sunxi/dram_timings/a523_lpddr4.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/arch/arm/mach-sunxi/dram_timings/a523_lpddr4.c b/arch/arm/mach-sunxi/dram_timings/a523_lpddr4.c new file mode 100644 index 00000000000..940a4d04d57 --- /dev/null +++ b/arch/arm/mach-sunxi/dram_timings/a523_lpddr4.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * sun55i A523 LPDDR4-2133 timings, as programmed by Allwinner's boot0 + * + * (C) Copyright 2024 Jernej Skrabec <jernej.skrabec@gmail.com> + * (C) Copyright 2023 Mikhail Kalashnikov <iuncuim@gmail.com> + * + */ + +#include <asm/arch/dram.h> +#include <asm/arch/cpu.h> + +void mctl_set_timing_params(u32 clk) +{ + struct sunxi_mctl_ctl_reg * const mctl_ctl = + (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE; + u8 tcl, tcwl, t_rdata_en, trtp, twr, tphy_wrlat; + unsigned int mr1, mr2; + + u8 tccd = 4; + u8 tfaw = ns_to_t(40, clk); + u8 trrd = max(ns_to_t(10, clk), 2); + u8 twtr = max(ns_to_t(10, clk), 4); + u8 trcd = max(ns_to_t(18, clk), 2); + u8 trc = ns_to_t(65, clk); + u8 txp = max(ns_to_t(8, clk), 2); + u8 trp = ns_to_t(21, clk); + u8 tras = ns_to_t(42, clk); + u16 trefi = ns_to_t(3904, clk) / 32; + u16 trfc = ns_to_t(280, clk); + u16 txsr = ns_to_t(290, clk); + + u8 tmrw = max(ns_to_t(14, clk), 5); + u8 tmod = 12; + u8 tcke = max(ns_to_t(15, clk), 2); + u8 tcksrx = max(ns_to_t(2, clk), 2); + u8 tcksre = max(ns_to_t(5, clk), 2); + u8 trasmax = (trefi * 9) / 32; + + if (clk <= 936) { + mr1 = 0x34; + mr2 = 0x1b; + tcl = 10; + tcwl = 5; + t_rdata_en = 17; + trtp = 4; + tphy_wrlat = 5; + twr = 10; + } else if (clk <= 1200) { + mr1 = 0x54; + mr2 = 0x2d; + tcl = 14; + tcwl = 7; + t_rdata_en = 25; + trtp = 6; + tphy_wrlat = 9; + twr = 15; + } else { + mr1 = 0x64; + mr2 = 0x36; + tcl = 16; + tcwl = 8; + t_rdata_en = 29; + trtp = 7; + tphy_wrlat = 11; + twr = 17; + } + + u8 tmrd = tmrw; + u8 tckesr = tcke; + u8 twtp = twr + 9 + tcwl; + u8 twr2rd = twtr + 9 + tcwl; + u8 trd2wr = ns_to_t(4, clk) + 7 - ns_to_t(1, clk) + tcl; + u8 txs = 4; + u8 txsdll = 16; + u8 txsabort = 4; + u8 txsfast = 4; + + /* 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, 0x558); + writel(0x01f20000, &mctl_ctl->init[1]); + writel(0x00001705, &mctl_ctl->init[2]); + writel(0, &mctl_ctl->dfimisc); + writel((mr1 << 16) | mr2, &mctl_ctl->init[3]); + writel(0x00330000, &mctl_ctl->init[4]); + writel(0x00040072, &mctl_ctl->init[6]); + writel(0x00260008, &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); +} |