1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2016 Keymile AG
4 * Rainer Boschung <rainer.boschung@keymile.com>
5 *
6 * Copyright 2013 Freescale Semiconductor, Inc.
7 */
8
9 #include <asm/fsl_law.h>
10 #include <asm/mmu.h>
11 #include <asm/mpc85xx_gpio.h>
12 #include <fsl_ddr_sdram.h>
13 #include <fsl_ddr_dimm_params.h>
14 #include <hwconfig.h>
15 #include <i2c.h>
16 #include <init.h>
17
18 DECLARE_GLOBAL_DATA_PTR;
19
20 #define DQSn_POS(n) (3 - (((n) - 1) % 4)) * 8
21 #define DQSn_START(n, start) ((start) << DQSn_POS(n))
22
fsl_ddr_board_options(memctl_options_t * popts,dimm_params_t * pdimm,unsigned int ctrl_num)23 void fsl_ddr_board_options(memctl_options_t *popts, dimm_params_t *pdimm,
24 unsigned int ctrl_num)
25 {
26 if (ctrl_num > 1) {
27 printf("Not supported controller number %d\n", ctrl_num);
28 return;
29 }
30
31 /* 1/2 clk delay between wr command and data strobe */
32 popts->write_data_delay = 4;
33 /* clk lauched 1/2 applied cylcle after address command */
34 popts->clk_adjust = 4;
35 /* 1T timing: command/address held for only 1 cycle */
36 popts->twot_en = 0;
37 popts->threet_en = 0;
38
39 /* optimize cpo for erratum A-009942 */
40 popts->cpo_sample = 0x3b;
41
42 /* we have only one module, half str should be OK */
43 popts->half_strength_driver_enable = 1;
44 /*
45 * Write leveling override
46 */
47 /* set for DDR3-1600 */
48 popts->wrlvl_override = 1;
49 popts->wrlvl_sample = 0xf;
50 popts->wrlvl_start = 0x7;
51 /* DQS write leveling start time according layout */
52 popts->wrlvl_ctl_2 = (DQSn_START(1, 0x06) |
53 DQSn_START(2, 0x06) |
54 DQSn_START(3, 0x07) |
55 DQSn_START(4, 0x07));
56 popts->wrlvl_ctl_3 = (DQSn_START(5, 0x07) |
57 DQSn_START(6, 0x08) |
58 DQSn_START(7, 0x08) |
59 DQSn_START(8, 0x08));
60
61 /*
62 * rtt and wtt_wr override
63 */
64 popts->rtt_override = 0;
65
66 /* Enable ZQ calibration */
67 popts->zq_en = 1;
68
69 /* DHC_EN =1, ODT = 75 Ohm */
70 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
71 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
72 }
73
dram_init(void)74 int dram_init(void)
75 {
76 phys_size_t dram_size;
77
78 puts("Initializing....using SPD\n");
79
80 dram_size = fsl_ddr_sdram();
81
82 dram_size = setup_ddr_tlbs(dram_size / 0x100000);
83 dram_size *= 0x100000;
84
85 gd->ram_size = dram_size;
86
87 return 0;
88 }
89