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git01.mediatek.com / filogic / uboot / 0e5da9958b8f3c83c821b984539955fa0b3da2bc / . / arch / arm / mach-imx / mx7 / ddr.c
blob: 45954ed1edc0dfe8c40f69a82bf1cced13ad1d5c [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
Uri Mashiachdd587fa2017-09-24 09:00:23 +0300[diff] [blame]2/*
3 * DDR controller configuration for the i.MX7 architecture
4 *
5 * (C) Copyright 2017 CompuLab, Ltd. http://www.compulab.com
6 *
7 * Author: Uri Mashiach <uri.mashiach@compulab.co.il>
Uri Mashiachdd587fa2017-09-24 09:00:23 +0300[diff] [blame]8 */
9
10#include <linux/types.h>
11#include <asm/io.h>
12#include <asm/arch/imx-regs.h>
13#include <asm/arch/crm_regs.h>
14#include <asm/arch/mx7-ddr.h>
15#include <common.h>
Marek Vasutf4bb5652020-05-30 02:14:48 +0200[diff] [blame]16#include <linux/delay.h>
Uri Mashiachdd587fa2017-09-24 09:00:23 +0300[diff] [blame]17
18/*
19 * Routine: mx7_dram_cfg
20 * Description: DDR controller configuration
21 *
22 * @ddrc_regs_val: DDRC registers value
23 * @ddrc_mp_val: DDRC_MP registers value
24 * @ddr_phy_regs_val: DDR_PHY registers value
25 * @calib_param: calibration parameters
26 *
27 */
28void mx7_dram_cfg(struct ddrc *ddrc_regs_val, struct ddrc_mp *ddrc_mp_val,
29 struct ddr_phy *ddr_phy_regs_val,
30 struct mx7_calibration *calib_param)
31{
32 struct src *const src_regs = (struct src *)SRC_BASE_ADDR;
33 struct ddrc *const ddrc_regs = (struct ddrc *)DDRC_IPS_BASE_ADDR;
34 struct ddrc_mp *const ddrc_mp_reg = (struct ddrc_mp *)DDRC_MP_BASE_ADDR;
35 struct ddr_phy *const ddr_phy_regs =
36 (struct ddr_phy *)DDRPHY_IPS_BASE_ADDR;
37 struct iomuxc_gpr_base_regs *const iomuxc_gpr_regs =
38 (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
39 int i;
40
Marek Vasutf4bb5652020-05-30 02:14:48 +0200[diff] [blame]41 /*
42 * iMX7D RM 9.2.4.9.3 Power removal flow Table 9-11. Re-enabling power
43 * row 2 says "Reset controller / PHY by driving core_ddrc_rst = 0 ,
44 * aresetn_n = 0, presetn = 0. That means reset everything.
45 */
46 writel(SRC_DDRC_RCR_DDRC_CORE_RST_MASK | SRC_DDRC_RCR_DDRC_PRST_MASK,
47 &src_regs->ddrc_rcr);
48
49 /*
50 * iMX7D RM 6.2.7.26 SRC_DDRC_RCR says wait 30 cycles (of unknown).
51 * If we assume this is 30 cycles at 100 MHz (about the rate of a
52 * DRAM bus), that's 300 nS, so waiting 10 uS is more then plenty.
53 */
54 udelay(10);
55
56 /* De-assert DDR Controller 'preset' and DDR PHY reset */
57 clrbits_le32(&src_regs->ddrc_rcr, SRC_DDRC_RCR_DDRC_PRST_MASK);
Uri Mashiachdd587fa2017-09-24 09:00:23 +0300[diff] [blame]58
59 /* DDR controller configuration */
60 writel(ddrc_regs_val->mstr, &ddrc_regs->mstr);
61 writel(ddrc_regs_val->rfshtmg, &ddrc_regs->rfshtmg);
62 writel(ddrc_mp_val->pctrl_0, &ddrc_mp_reg->pctrl_0);
63 writel(ddrc_regs_val->init1, &ddrc_regs->init1);
64 writel(ddrc_regs_val->init0, &ddrc_regs->init0);
65 writel(ddrc_regs_val->init3, &ddrc_regs->init3);
66 writel(ddrc_regs_val->init4, &ddrc_regs->init4);
67 writel(ddrc_regs_val->init5, &ddrc_regs->init5);
68 writel(ddrc_regs_val->rankctl, &ddrc_regs->rankctl);
69 writel(ddrc_regs_val->dramtmg0, &ddrc_regs->dramtmg0);
70 writel(ddrc_regs_val->dramtmg1, &ddrc_regs->dramtmg1);
71 writel(ddrc_regs_val->dramtmg2, &ddrc_regs->dramtmg2);
72 writel(ddrc_regs_val->dramtmg3, &ddrc_regs->dramtmg3);
73 writel(ddrc_regs_val->dramtmg4, &ddrc_regs->dramtmg4);
74 writel(ddrc_regs_val->dramtmg5, &ddrc_regs->dramtmg5);
75 writel(ddrc_regs_val->dramtmg8, &ddrc_regs->dramtmg8);
76 writel(ddrc_regs_val->zqctl0, &ddrc_regs->zqctl0);
Marek Vasut494c4d82020-05-22 01:12:39 +0200[diff] [blame]77 writel(ddrc_regs_val->zqctl1, &ddrc_regs->zqctl1);
Uri Mashiachdd587fa2017-09-24 09:00:23 +0300[diff] [blame]78 writel(ddrc_regs_val->dfitmg0, &ddrc_regs->dfitmg0);
79 writel(ddrc_regs_val->dfitmg1, &ddrc_regs->dfitmg1);
80 writel(ddrc_regs_val->dfiupd0, &ddrc_regs->dfiupd0);
81 writel(ddrc_regs_val->dfiupd1, &ddrc_regs->dfiupd1);
82 writel(ddrc_regs_val->dfiupd2, &ddrc_regs->dfiupd2);
83 writel(ddrc_regs_val->addrmap0, &ddrc_regs->addrmap0);
84 writel(ddrc_regs_val->addrmap1, &ddrc_regs->addrmap1);
85 writel(ddrc_regs_val->addrmap4, &ddrc_regs->addrmap4);
86 writel(ddrc_regs_val->addrmap5, &ddrc_regs->addrmap5);
87 writel(ddrc_regs_val->addrmap6, &ddrc_regs->addrmap6);
88 writel(ddrc_regs_val->odtcfg, &ddrc_regs->odtcfg);
89 writel(ddrc_regs_val->odtmap, &ddrc_regs->odtmap);
90
Marek Vasutf4bb5652020-05-30 02:14:48 +0200[diff] [blame]91 /* De-assert DDR Controller 'core_ddrc_rstn' and 'aresetn' */
Uri Mashiachdd587fa2017-09-24 09:00:23 +0300[diff] [blame]92 clrbits_le32(&src_regs->ddrc_rcr, SRC_DDRC_RCR_DDRC_CORE_RST_MASK);
93
94 /* PHY configuration */
95 writel(ddr_phy_regs_val->phy_con0, &ddr_phy_regs->phy_con0);
96 writel(ddr_phy_regs_val->phy_con1, &ddr_phy_regs->phy_con1);
97 writel(ddr_phy_regs_val->phy_con4, &ddr_phy_regs->phy_con4);
98 writel(ddr_phy_regs_val->mdll_con0, &ddr_phy_regs->mdll_con0);
99 writel(ddr_phy_regs_val->drvds_con0, &ddr_phy_regs->drvds_con0);
100 writel(ddr_phy_regs_val->offset_wr_con0, &ddr_phy_regs->offset_wr_con0);
101 writel(ddr_phy_regs_val->offset_rd_con0, &ddr_phy_regs->offset_rd_con0);
102 writel(ddr_phy_regs_val->cmd_sdll_con0 |
103 DDR_PHY_CMD_SDLL_CON0_CTRL_RESYNC_MASK,
104 &ddr_phy_regs->cmd_sdll_con0);
105 writel(ddr_phy_regs_val->cmd_sdll_con0 &
106 ~DDR_PHY_CMD_SDLL_CON0_CTRL_RESYNC_MASK,
107 &ddr_phy_regs->cmd_sdll_con0);
108 writel(ddr_phy_regs_val->offset_lp_con0, &ddr_phy_regs->offset_lp_con0);
109
110 /* calibration */
111 for (i = 0; i < calib_param->num_val; i++)
112 writel(calib_param->values[i], &ddr_phy_regs->zq_con0);
113
114 /* Wake_up DDR PHY */
115 HW_CCM_CCGR_WR(CCGR_IDX_DDR, CCM_CLK_ON_N_N);
116 writel(IOMUXC_GPR_GPR8_ddr_phy_ctrl_wake_up(0xf) |
117 IOMUXC_GPR_GPR8_ddr_phy_dfi_init_start_MASK,
118 &iomuxc_gpr_regs->gpr[8]);
119 HW_CCM_CCGR_WR(CCGR_IDX_DDR, CCM_CLK_ON_R_W);
120}
121
122/*
123 * Routine: imx_ddr_size
124 * Description: extract the current DRAM size from the DDRC registers
125 *
126 * @return: DRAM size
127 */
128unsigned int imx_ddr_size(void)
129{
130 struct ddrc *const ddrc_regs = (struct ddrc *)DDRC_IPS_BASE_ADDR;
131 u32 reg_val, field_val;
132 int bits = 0;/* Number of address bits */
133
134 /* Count data bus width bits */
135 reg_val = readl(&ddrc_regs->mstr);
136 field_val = (reg_val & MSTR_DATA_BUS_WIDTH_MASK) >> MSTR_DATA_BUS_WIDTH_SHIFT;
137 bits += 2 - field_val;
138 /* Count rank address bits */
139 field_val = (reg_val & MSTR_DATA_ACTIVE_RANKS_MASK) >> MSTR_DATA_ACTIVE_RANKS_SHIFT;
140 if (field_val > 1)
141 bits += field_val - 1;
142 /* Count column address bits */
143 bits += 2;/* Column address 0 and 1 are fixed mapped */
144 reg_val = readl(&ddrc_regs->addrmap2);
145 field_val = (reg_val & ADDRMAP2_COL_B2_MASK) >> ADDRMAP2_COL_B2_SHIFT;
146 if (field_val <= 7)
147 bits++;
148 field_val = (reg_val & ADDRMAP2_COL_B3_MASK) >> ADDRMAP2_COL_B3_SHIFT;
149 if (field_val <= 7)
150 bits++;
151 field_val = (reg_val & ADDRMAP2_COL_B4_MASK) >> ADDRMAP2_COL_B4_SHIFT;
152 if (field_val <= 7)
153 bits++;
154 field_val = (reg_val & ADDRMAP2_COL_B5_MASK) >> ADDRMAP2_COL_B5_SHIFT;
155 if (field_val <= 7)
156 bits++;
157 reg_val = readl(&ddrc_regs->addrmap3);
158 field_val = (reg_val & ADDRMAP3_COL_B6_MASK) >> ADDRMAP3_COL_B6_SHIFT;
159 if (field_val <= 7)
160 bits++;
161 field_val = (reg_val & ADDRMAP3_COL_B7_MASK) >> ADDRMAP3_COL_B7_SHIFT;
162 if (field_val <= 7)
163 bits++;
164 field_val = (reg_val & ADDRMAP3_COL_B8_MASK) >> ADDRMAP3_COL_B8_SHIFT;
165 if (field_val <= 7)
166 bits++;
167 field_val = (reg_val & ADDRMAP3_COL_B9_MASK) >> ADDRMAP3_COL_B9_SHIFT;
168 if (field_val <= 7)
169 bits++;
170 reg_val = readl(&ddrc_regs->addrmap4);
171 field_val = (reg_val & ADDRMAP4_COL_B10_MASK) >> ADDRMAP4_COL_B10_SHIFT;
172 if (field_val <= 7)
173 bits++;
174 field_val = (reg_val & ADDRMAP4_COL_B11_MASK) >> ADDRMAP4_COL_B11_SHIFT;
175 if (field_val <= 7)
176 bits++;
177 /* Count row address bits */
178 reg_val = readl(&ddrc_regs->addrmap5);
179 field_val = (reg_val & ADDRMAP5_ROW_B0_MASK) >> ADDRMAP5_ROW_B0_SHIFT;
180 if (field_val <= 11)
181 bits++;
182 field_val = (reg_val & ADDRMAP5_ROW_B1_MASK) >> ADDRMAP5_ROW_B1_SHIFT;
183 if (field_val <= 11)
184 bits++;
185 field_val = (reg_val & ADDRMAP5_ROW_B2_10_MASK) >> ADDRMAP5_ROW_B2_10_SHIFT;
186 if (field_val <= 11)
187 bits += 9;
188 field_val = (reg_val & ADDRMAP5_ROW_B11_MASK) >> ADDRMAP5_ROW_B11_SHIFT;
189 if (field_val <= 11)
190 bits++;
191 reg_val = readl(&ddrc_regs->addrmap6);
192 field_val = (reg_val & ADDRMAP6_ROW_B12_MASK) >> ADDRMAP6_ROW_B12_SHIFT;
193 if (field_val <= 11)
194 bits++;
195 field_val = (reg_val & ADDRMAP6_ROW_B13_MASK) >> ADDRMAP6_ROW_B13_SHIFT;
196 if (field_val <= 11)
197 bits++;
198 field_val = (reg_val & ADDRMAP6_ROW_B14_MASK) >> ADDRMAP6_ROW_B14_SHIFT;
199 if (field_val <= 11)
200 bits++;
201 field_val = (reg_val & ADDRMAP6_ROW_B15_MASK) >> ADDRMAP6_ROW_B15_SHIFT;
202 if (field_val <= 11)
203 bits++;
204 /* Count bank bits */
205 reg_val = readl(&ddrc_regs->addrmap1);
206 field_val = (reg_val & ADDRMAP1_BANK_B0_MASK) >> ADDRMAP1_BANK_B0_SHIFT;
207 if (field_val <= 30)
208 bits++;
209 field_val = (reg_val & ADDRMAP1_BANK_B1_MASK) >> ADDRMAP1_BANK_B1_SHIFT;
210 if (field_val <= 30)
211 bits++;
212 field_val = (reg_val & ADDRMAP1_BANK_B2_MASK) >> ADDRMAP1_BANK_B2_SHIFT;
213 if (field_val <= 29)
214 bits++;
215
Marcel Ziswiler21d69562018-09-19 13:01:55 +0200[diff] [blame]216 /* cap to max 2 GB */
217 if (bits > 31)
218 bits = 31;
219
Uri Mashiachdd587fa2017-09-24 09:00:23 +0300[diff] [blame]220 return 1 << bits;
221}