1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2013 Freescale Semiconductor, Inc.
4 */
5
6 #include <common.h>
7 #include <i2c.h>
8 #include <hwconfig.h>
9 #include <init.h>
10 #include <log.h>
11 #include <asm/global_data.h>
12 #include <asm/mmu.h>
13 #include <fsl_ddr_sdram.h>
14 #include <fsl_ddr_dimm_params.h>
15 #include <asm/fsl_law.h>
16 #include <asm/mpc85xx_gpio.h>
17 #include <linux/delay.h>
18 #include "ddr.h"
19
20 DECLARE_GLOBAL_DATA_PTR;
21
fsl_ddr_board_options(memctl_options_t * popts,dimm_params_t * pdimm,unsigned int ctrl_num)22 void fsl_ddr_board_options(memctl_options_t *popts,
23 dimm_params_t *pdimm,
24 unsigned int ctrl_num)
25 {
26 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
27 ulong ddr_freq;
28
29 if (ctrl_num > 1) {
30 printf("Not supported controller number %d\n", ctrl_num);
31 return;
32 }
33 if (!pdimm->n_ranks)
34 return;
35
36 pbsp = udimms[0];
37
38 /* Get clk_adjust according to the board ddr
39 * freqency and n_banks specified in board_specific_parameters table.
40 */
41 ddr_freq = get_ddr_freq(0) / 1000000;
42 while (pbsp->datarate_mhz_high) {
43 if (pbsp->n_ranks == pdimm->n_ranks &&
44 (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
45 if (ddr_freq <= pbsp->datarate_mhz_high) {
46 popts->clk_adjust = pbsp->clk_adjust;
47 popts->wrlvl_start = pbsp->wrlvl_start;
48 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
49 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
50 goto found;
51 }
52 pbsp_highest = pbsp;
53 }
54 pbsp++;
55 }
56
57 if (pbsp_highest) {
58 printf("Error: board specific timing not found\n");
59 printf("for data rate %lu MT/s\n", ddr_freq);
60 printf("Trying to use the highest speed (%u) parameters\n",
61 pbsp_highest->datarate_mhz_high);
62 popts->clk_adjust = pbsp_highest->clk_adjust;
63 popts->wrlvl_start = pbsp_highest->wrlvl_start;
64 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
65 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
66 } else {
67 panic("DIMM is not supported by this board");
68 }
69 found:
70 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
71 "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, "
72 "wrlvl_ctrl_3 0x%x\n",
73 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
74 pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
75 pbsp->wrlvl_ctl_3);
76
77 /*
78 * Factors to consider for half-strength driver enable:
79 * - number of DIMMs installed
80 */
81 #ifdef CONFIG_SYS_FSL_DDR4
82 popts->half_strength_driver_enable = 1;
83 /* optimize cpo for erratum A-009942 */
84 popts->cpo_sample = 0x59;
85 #else
86 popts->half_strength_driver_enable = 0;
87 #endif
88 /*
89 * Write leveling override
90 */
91 popts->wrlvl_override = 1;
92 popts->wrlvl_sample = 0xf;
93
94 /*
95 * rtt and rtt_wr override
96 */
97 popts->rtt_override = 0;
98
99 /* Enable ZQ calibration */
100 popts->zq_en = 1;
101
102 /* DHC_EN =1, ODT = 75 Ohm */
103 #ifdef CONFIG_SYS_FSL_DDR4
104 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_120OHM);
105 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_120OHM) |
106 DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */
107 #else
108 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
109 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
110 #endif
111 }
112
113 #if defined(CONFIG_DEEP_SLEEP)
board_mem_sleep_setup(void)114 void board_mem_sleep_setup(void)
115 {
116 void __iomem *cpld_base = (void *)CONFIG_SYS_CPLD_BASE;
117
118 /* does not provide HW signals for power management */
119 clrbits_8(cpld_base + 0x17, 0x40);
120 /* Disable MCKE isolation */
121 gpio_set_value(2, 0);
122 udelay(1);
123 }
124 #endif
125
dram_init(void)126 int dram_init(void)
127 {
128 phys_size_t dram_size;
129
130 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
131 puts("Initializing....using SPD\n");
132 dram_size = fsl_ddr_sdram();
133 #else
134 dram_size = fsl_ddr_sdram_size();
135 #endif
136 dram_size = setup_ddr_tlbs(dram_size / 0x100000);
137 dram_size *= 0x100000;
138
139 #if defined(CONFIG_DEEP_SLEEP) && !defined(CONFIG_SPL_BUILD)
140 fsl_dp_resume();
141 #endif
142
143 gd->ram_size = dram_size;
144
145 return 0;
146 }
147