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git01.mediatek.com / filogic / uboot / d4b57ec1d154916492fefd33ded0b3c2a7daff00 / . / arch / arm / mach-sunxi / dram_timings / h6_lpddr3.c
blob: c243b574406de13941851e29bd399ca5fce87298 [file] [log] [blame]
Andre Przywara1c7a7512019-07-15 02:27:06 +0100[diff] [blame]1/*
2 * sun50i H6 LPDDR3 timings
3 *
4 * (C) Copyright 2017 Icenowy Zheng <icenowy@aosc.io>
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
Andre Przywara1c7a7512019-07-15 02:27:06 +0100[diff] [blame]9#include <asm/arch/dram.h>
10#include <asm/arch/cpu.h>
11
12static u32 mr_lpddr3[12] = {
13 0x00000000, 0x00000043, 0x0000001a, 0x00000001,
14 0x00000000, 0x00000000, 0x00000048, 0x00000000,
15 0x00000000, 0x00000000, 0x00000000, 0x00000003,
16};
17
18/* TODO: flexible timing */
19void mctl_set_timing_params(struct dram_para *para)
20{
21 struct sunxi_mctl_ctl_reg * const mctl_ctl =
22 (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
23 struct sunxi_mctl_phy_reg * const mctl_phy =
24 (struct sunxi_mctl_phy_reg *)SUNXI_DRAM_PHY0_BASE;
25 int i;
26
27 u8 tccd = 2;
28 u8 tfaw = max(ns_to_t(50), 4);
29 u8 trrd = max(ns_to_t(10), 2);
30 u8 trcd = max(ns_to_t(24), 2);
31 u8 trc = ns_to_t(70);
32 u8 txp = max(ns_to_t(8), 2);
33 u8 twtr = max(ns_to_t(8), 2);
34 u8 trtp = max(ns_to_t(8), 2);
35 u8 twr = max(ns_to_t(15), 2);
36 u8 trp = ns_to_t(18);
37 u8 tras = ns_to_t(42);
38 u8 twtr_sa = ns_to_t(5);
39 u8 tcksrea = ns_to_t(11);
40 u16 trefi = ns_to_t(3900) / 32;
41 u16 trfc = ns_to_t(210);
42 u16 txsr = ns_to_t(220);
43
44 if (CONFIG_DRAM_CLK % 400 == 0) {
45 /* Round up these parameters */
46 twtr_sa++;
47 tcksrea++;
48 }
49
50 u8 tmrw = 5;
51 u8 tmrd = 5;
52 u8 tmod = 12;
53 u8 tcke = 3;
54 u8 tcksrx = 5;
55 u8 tcksre = 5;
56 u8 tckesr = 5;
57 u8 trasmax = CONFIG_DRAM_CLK / 60;
58 u8 txs = 4;
59 u8 txsdll = 4;
60 u8 txsabort = 4;
61 u8 txsfast = 4;
62
63 u8 tcl = 5; /* CL 10 */
64 u8 tcwl = 3; /* CWL 6 */
65 u8 t_rdata_en = twtr_sa + 8;
66
67 u32 tdinit0 = (200 * CONFIG_DRAM_CLK) + 1; /* 200us */
68 u32 tdinit1 = (100 * CONFIG_DRAM_CLK) / 1000 + 1; /* 100ns */
69 u32 tdinit2 = (11 * CONFIG_DRAM_CLK) + 1; /* 11us */
70 u32 tdinit3 = (1 * CONFIG_DRAM_CLK) + 1; /* 1us */
71
72 u8 twtp = tcwl + 4 + twr + 1;
73 /*
74 * The code below for twr2rd and trd2wr follows the IP core's
75 * document from ZynqMP and i.MX7. The BSP has both number
76 * substracted by 2.
77 */
78 u8 twr2rd = tcwl + 4 + 1 + twtr;
79 u8 trd2wr = tcl + 4 + (tcksrea >> 1) - tcwl + 1;
80
81 /* set mode registers */
82 for (i = 0; i < ARRAY_SIZE(mr_lpddr3); i++)
83 writel(mr_lpddr3[i], &mctl_phy->mr[i]);
84
85 /* set DRAM timing */
86 writel((twtp << 24) | (tfaw << 16) | (trasmax << 8) | tras,
87 &mctl_ctl->dramtmg[0]);
88 writel((txp << 16) | (trtp << 8) | trc, &mctl_ctl->dramtmg[1]);
89 writel((tcwl << 24) | (tcl << 16) | (trd2wr << 8) | twr2rd,
90 &mctl_ctl->dramtmg[2]);
91 writel((tmrw << 20) | (tmrd << 12) | tmod, &mctl_ctl->dramtmg[3]);
92 writel((trcd << 24) | (tccd << 16) | (trrd << 8) | trp,
93 &mctl_ctl->dramtmg[4]);
94 writel((tcksrx << 24) | (tcksre << 16) | (tckesr << 8) | tcke,
95 &mctl_ctl->dramtmg[5]);
96 /* Value suggested by ZynqMP manual and used by libdram */
97 writel((txp + 2) | 0x02020000, &mctl_ctl->dramtmg[6]);
98 writel((txsfast << 24) | (txsabort << 16) | (txsdll << 8) | txs,
99 &mctl_ctl->dramtmg[8]);
100 writel(txsr, &mctl_ctl->dramtmg[14]);
101
102 clrsetbits_le32(&mctl_ctl->init[0], (3 << 30), (1 << 30));
103 writel(0, &mctl_ctl->dfimisc);
104 clrsetbits_le32(&mctl_ctl->rankctl, 0xff0, 0x660);
105
106 /*
107 * Set timing registers of the PHY.
108 * Note: the PHY is clocked 2x from the DRAM frequency.
109 */
110 writel((trrd << 25) | (tras << 17) | (trp << 9) | (trtp << 1),
111 &mctl_phy->dtpr[0]);
112 writel((tfaw << 17) | 0x28000400 | (tmrd << 1), &mctl_phy->dtpr[1]);
113 writel(((txs << 6) - 1) | (tcke << 17), &mctl_phy->dtpr[2]);
114 writel(((txsdll << 22) - (0x1 << 16)) | twtr_sa | (tcksrea << 8),
115 &mctl_phy->dtpr[3]);
116 writel((txp << 1) | (trfc << 17) | 0x800, &mctl_phy->dtpr[4]);
117 writel((trc << 17) | (trcd << 9) | (twtr << 1), &mctl_phy->dtpr[5]);
118 writel(0x0505, &mctl_phy->dtpr[6]);
119
120 /* Configure DFI timing */
121 writel(tcl | 0x2000200 | (t_rdata_en << 16) | 0x808000,
122 &mctl_ctl->dfitmg0);
123 writel(0x040201, &mctl_ctl->dfitmg1);
124
125 /* Configure PHY timing */
126 writel(tdinit0 | (tdinit1 << 20), &mctl_phy->ptr[3]);
127 writel(tdinit2 | (tdinit3 << 18), &mctl_phy->ptr[4]);
128
129 /* set refresh timing */
130 writel((trefi << 16) | trfc, &mctl_ctl->rfshtmg);
131}