mirror of
https://github.com/AsahiLinux/u-boot
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ec4670a137
As we added LPDDR3 support in the former patch, we need a set of timing info to really enable it. Add the timing info used by stock boot0. Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz> Acked-by: Jagan Teki <jagan@amarulasolutions.com> Tested-by: Jagan Teki <jagan@amarulasolutions.com>
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
#include <common.h>
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#include <asm/arch/dram.h>
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#include <asm/arch/cpu.h>
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void mctl_set_timing_params(uint16_t socid, struct dram_para *para)
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{
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struct sunxi_mctl_ctl_reg * const mctl_ctl =
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(struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
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u8 tccd = 2;
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u8 tfaw = max(ns_to_t(50), 4);
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u8 trrd = max(ns_to_t(10), 2);
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u8 trcd = max(ns_to_t(24), 2);
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u8 trc = ns_to_t(70);
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u8 txp = max(ns_to_t(8), 2);
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u8 twtr = max(ns_to_t(8), 2);
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u8 trtp = max(ns_to_t(8), 2);
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u8 twr = max(ns_to_t(15), 3);
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u8 trp = max(ns_to_t(27), 2);
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u8 tras = ns_to_t(42);
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u16 trefi = ns_to_t(3900) / 32;
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u16 trfc = ns_to_t(210);
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u8 tmrw = 5;
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u8 tmrd = 5;
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u8 tmod = 12;
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u8 tcke = 3;
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u8 tcksrx = 5;
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u8 tcksre = 5;
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u8 tckesr = 5;
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u8 trasmax = 24;
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u8 tcl = 6; /* CL 12 */
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u8 tcwl = 3; /* CWL 6 */
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u8 t_rdata_en = 5;
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u8 wr_latency = 2;
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u32 tdinit0 = (200 * CONFIG_DRAM_CLK) + 1; /* 200us */
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u32 tdinit1 = (100 * CONFIG_DRAM_CLK) / 1000 + 1; /* 100ns */
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u32 tdinit2 = (11 * CONFIG_DRAM_CLK) + 1; /* 11us */
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u32 tdinit3 = (1 * CONFIG_DRAM_CLK) + 1; /* 1us */
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u8 twtp = tcwl + 4 + twr + 1;
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u8 twr2rd = tcwl + 4 + 1 + twtr;
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u8 trd2wr = tcl + 4 + 5 - tcwl + 1;
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/* set mode register */
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writel(0xc3, &mctl_ctl->mr[1]); /* nWR=8, BL8 */
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writel(0xa, &mctl_ctl->mr[2]); /* RL=12, WL=6 */
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writel(0x2, &mctl_ctl->mr[3]); /* 40 0hms PD/PU */
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/* set DRAM timing */
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writel(DRAMTMG0_TWTP(twtp) | DRAMTMG0_TFAW(tfaw) |
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DRAMTMG0_TRAS_MAX(trasmax) | DRAMTMG0_TRAS(tras),
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&mctl_ctl->dramtmg[0]);
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writel(DRAMTMG1_TXP(txp) | DRAMTMG1_TRTP(trtp) | DRAMTMG1_TRC(trc),
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&mctl_ctl->dramtmg[1]);
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writel(DRAMTMG2_TCWL(tcwl) | DRAMTMG2_TCL(tcl) |
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DRAMTMG2_TRD2WR(trd2wr) | DRAMTMG2_TWR2RD(twr2rd),
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&mctl_ctl->dramtmg[2]);
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writel(DRAMTMG3_TMRW(tmrw) | DRAMTMG3_TMRD(tmrd) | DRAMTMG3_TMOD(tmod),
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&mctl_ctl->dramtmg[3]);
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writel(DRAMTMG4_TRCD(trcd) | DRAMTMG4_TCCD(tccd) | DRAMTMG4_TRRD(trrd) |
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DRAMTMG4_TRP(trp), &mctl_ctl->dramtmg[4]);
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writel(DRAMTMG5_TCKSRX(tcksrx) | DRAMTMG5_TCKSRE(tcksre) |
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DRAMTMG5_TCKESR(tckesr) | DRAMTMG5_TCKE(tcke),
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&mctl_ctl->dramtmg[5]);
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/* set two rank timing */
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clrsetbits_le32(&mctl_ctl->dramtmg[8], (0xff << 8) | (0xff << 0),
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(0x66 << 8) | (0x10 << 0));
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/* set PHY interface timing, write latency and read latency configure */
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writel((0x2 << 24) | (t_rdata_en << 16) | (0x1 << 8) |
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(wr_latency << 0), &mctl_ctl->pitmg[0]);
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/* set PHY timing, PTR0-2 use default */
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writel(PTR3_TDINIT0(tdinit0) | PTR3_TDINIT1(tdinit1), &mctl_ctl->ptr[3]);
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writel(PTR4_TDINIT2(tdinit2) | PTR4_TDINIT3(tdinit3), &mctl_ctl->ptr[4]);
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/* set refresh timing */
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writel(RFSHTMG_TREFI(trefi) | RFSHTMG_TRFC(trfc), &mctl_ctl->rfshtmg);
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}
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