2 * Copyright 2011-2012 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/immap_85xx.h>
10 #include <asm/processor.h>
11 #include <asm/fsl_ddr_sdram.h>
12 #include <asm/fsl_ddr_dimm_params.h>
14 #include <asm/fsl_law.h>
16 DECLARE_GLOBAL_DATA_PTR
;
18 #ifndef CONFIG_SYS_DDR_RAW_TIMING
19 #define CONFIG_SYS_DRAM_SIZE 1024
21 fsl_ddr_cfg_regs_t ddr_cfg_regs_800
= {
22 .cs
[0].bnds
= CONFIG_SYS_DDR_CS0_BNDS
,
23 .cs
[0].config
= CONFIG_SYS_DDR_CS0_CONFIG
,
24 .cs
[0].config_2
= CONFIG_SYS_DDR_CS0_CONFIG_2
,
25 .timing_cfg_3
= CONFIG_SYS_DDR_TIMING_3_800
,
26 .timing_cfg_0
= CONFIG_SYS_DDR_TIMING_0_800
,
27 .timing_cfg_1
= CONFIG_SYS_DDR_TIMING_1_800
,
28 .timing_cfg_2
= CONFIG_SYS_DDR_TIMING_2_800
,
29 .ddr_sdram_cfg
= CONFIG_SYS_DDR_CONTROL
,
30 .ddr_sdram_cfg_2
= CONFIG_SYS_DDR_CONTROL_2
,
31 .ddr_sdram_mode
= CONFIG_SYS_DDR_MODE_1_800
,
32 .ddr_sdram_mode_2
= CONFIG_SYS_DDR_MODE_2_800
,
33 .ddr_sdram_md_cntl
= CONFIG_SYS_DDR_MODE_CONTROL
,
34 .ddr_sdram_interval
= CONFIG_SYS_DDR_INTERVAL_800
,
35 .ddr_data_init
= CONFIG_MEM_INIT_VALUE
,
36 .ddr_sdram_clk_cntl
= CONFIG_SYS_DDR_CLK_CTRL_800
,
37 .ddr_init_addr
= CONFIG_SYS_DDR_INIT_ADDR
,
38 .ddr_init_ext_addr
= CONFIG_SYS_DDR_INIT_EXT_ADDR
,
39 .timing_cfg_4
= CONFIG_SYS_DDR_TIMING_4
,
40 .timing_cfg_5
= CONFIG_SYS_DDR_TIMING_5
,
41 .ddr_zq_cntl
= CONFIG_SYS_DDR_ZQ_CONTROL
,
42 .ddr_wrlvl_cntl
= CONFIG_SYS_DDR_WRLVL_CONTROL_800
,
43 .ddr_sr_cntr
= CONFIG_SYS_DDR_SR_CNTR
,
44 .ddr_sdram_rcw_1
= CONFIG_SYS_DDR_RCW_1
,
45 .ddr_sdram_rcw_2
= CONFIG_SYS_DDR_RCW_2
48 fixed_ddr_parm_t fixed_ddr_parm_0
[] = {
49 {750, 850, &ddr_cfg_regs_800
},
53 unsigned long get_sdram_size(void)
55 return get_ram_size(CONFIG_SYS_DDR_SDRAM_BASE
, CONFIG_SYS_DRAM_SIZE
);
59 * Fixed sdram init -- doesn't use serial presence detect.
61 phys_size_t
fixed_sdram(void)
65 fsl_ddr_cfg_regs_t ddr_cfg_regs
;
67 ulong ddr_freq
, ddr_freq_mhz
;
69 ddr_freq
= get_ddr_freq(0);
70 ddr_freq_mhz
= ddr_freq
/ 1000000;
72 printf("Configuring DDR for %s MT/s data rate\n",
73 strmhz(buf
, ddr_freq
));
75 for (i
= 0; fixed_ddr_parm_0
[i
].max_freq
> 0; i
++) {
76 if ((ddr_freq_mhz
> fixed_ddr_parm_0
[i
].min_freq
) &&
77 (ddr_freq_mhz
<= fixed_ddr_parm_0
[i
].max_freq
)) {
78 memcpy(&ddr_cfg_regs
, fixed_ddr_parm_0
[i
].ddr_settings
,
79 sizeof(ddr_cfg_regs
));
84 if (fixed_ddr_parm_0
[i
].max_freq
== 0) {
85 panic("Unsupported DDR data rate %s MT/s data rate\n",
86 strmhz(buf
, ddr_freq
));
89 ddr_size
= (phys_size_t
) CONFIG_SYS_SDRAM_SIZE
* 1024 * 1024;
90 fsl_ddr_set_memctl_regs(&ddr_cfg_regs
, 0);
92 if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE
, ddr_size
,
93 LAW_TRGT_IF_DDR_1
) < 0) {
94 printf("ERROR setting Local Access Windows for DDR\n");
101 #else /* CONFIG_SYS_DDR_RAW_TIMING */
102 /* Micron MT41J256M8HX-15E */
103 dimm_params_t ddr_raw_timing
= {
105 .rank_density
= 1073741824u,
106 .capacity
= 1073741824u,
107 .primary_sdram_width
= 32,
109 .registered_dimm
= 0,
113 .n_banks_per_sdram_device
= 8,
115 .burst_lengths_bitmask
= 0x0c,
118 .caslat_X
= 0x1e << 4, /* 5,6,7,8 */
129 .refresh_rate_ps
= 7800000,
133 int fsl_ddr_get_dimm_params(dimm_params_t
*pdimm
,
134 unsigned int controller_number
,
135 unsigned int dimm_number
)
137 const char dimm_model
[] = "Fixed DDR on board";
139 if ((controller_number
== 0) && (dimm_number
== 0)) {
140 memcpy(pdimm
, &ddr_raw_timing
, sizeof(dimm_params_t
));
141 memset(pdimm
->mpart
, 0, sizeof(pdimm
->mpart
));
142 memcpy(pdimm
->mpart
, dimm_model
, sizeof(dimm_model
) - 1);
148 void fsl_ddr_board_options(memctl_options_t
*popts
,
149 dimm_params_t
*pdimm
,
150 unsigned int ctrl_num
)
153 popts
->clk_adjust
= 6;
154 popts
->cpo_override
= 0x1f;
155 popts
->write_data_delay
= 2;
156 popts
->half_strength_driver_enable
= 1;
157 /* Write leveling override */
159 popts
->wrlvl_override
= 1;
160 popts
->wrlvl_sample
= 0xf;
161 popts
->wrlvl_start
= 0x8;
162 popts
->trwt_override
= 1;
165 for (i
= 0; i
< CONFIG_CHIP_SELECTS_PER_CTRL
; i
++) {
166 popts
->cs_local_opts
[i
].odt_rd_cfg
= FSL_DDR_ODT_NEVER
;
167 popts
->cs_local_opts
[i
].odt_wr_cfg
= FSL_DDR_ODT_CS
;
171 #endif /* CONFIG_SYS_DDR_RAW_TIMING */