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1 /*
2  * Copyright (C) 2015 Marek Vasut <marex@denx.de>
3  *
4  * SPDX-License-Identifier:    GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <errno.h>
9 #include <asm/arch/sdram.h>
10
11 /* Board-specific header. */
12 #include <qts/sdram_config.h>
13
14 static const struct socfpga_sdram_config sdram_config = {
15         .ctrl_cfg =
16                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_MEMTYPE <<
17                         SDR_CTRLGRP_CTRLCFG_MEMTYPE_LSB)                |
18                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_MEMBL <<
19                         SDR_CTRLGRP_CTRLCFG_MEMBL_LSB)                  |
20                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_ADDRORDER <<
21                         SDR_CTRLGRP_CTRLCFG_ADDRORDER_LSB)              |
22                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_ECCEN <<
23                         SDR_CTRLGRP_CTRLCFG_ECCEN_LSB)                  |
24                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_ECCCORREN <<
25                         SDR_CTRLGRP_CTRLCFG_ECCCORREN_LSB)              |
26                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_REORDEREN <<
27                         SDR_CTRLGRP_CTRLCFG_REORDEREN_LSB)              |
28                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_STARVELIMIT <<
29                         SDR_CTRLGRP_CTRLCFG_STARVELIMIT_LSB)            |
30                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_DQSTRKEN <<
31                         SDR_CTRLGRP_CTRLCFG_DQSTRKEN_LSB)               |
32                 (CONFIG_HPS_SDR_CTRLCFG_CTRLCFG_NODMPINS <<
33                         SDR_CTRLGRP_CTRLCFG_NODMPINS_LSB),
34         .dram_timing1 =
35                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING1_TCWL <<
36                         SDR_CTRLGRP_DRAMTIMING1_TCWL_LSB)               |
37                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING1_AL <<
38                         SDR_CTRLGRP_DRAMTIMING1_TAL_LSB)                |
39                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING1_TCL <<
40                         SDR_CTRLGRP_DRAMTIMING1_TCL_LSB)                |
41                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING1_TRRD <<
42                         SDR_CTRLGRP_DRAMTIMING1_TRRD_LSB)               |
43                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING1_TFAW <<
44                         SDR_CTRLGRP_DRAMTIMING1_TFAW_LSB)               |
45                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING1_TRFC <<
46                         SDR_CTRLGRP_DRAMTIMING1_TRFC_LSB),
47         .dram_timing2 =
48                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING2_IF_TREFI <<
49                         SDR_CTRLGRP_DRAMTIMING2_TREFI_LSB)              |
50                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING2_IF_TRCD <<
51                         SDR_CTRLGRP_DRAMTIMING2_TRCD_LSB)               |
52                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING2_IF_TRP <<
53                         SDR_CTRLGRP_DRAMTIMING2_TRP_LSB)                |
54                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING2_IF_TWR <<
55                         SDR_CTRLGRP_DRAMTIMING2_TWR_LSB)                |
56                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING2_IF_TWTR <<
57                         SDR_CTRLGRP_DRAMTIMING2_TWTR_LSB),
58         .dram_timing3 =
59                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING3_TRTP <<
60                         SDR_CTRLGRP_DRAMTIMING3_TRTP_LSB)               |
61                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING3_TRAS <<
62                         SDR_CTRLGRP_DRAMTIMING3_TRAS_LSB)               |
63                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING3_TRC <<
64                         SDR_CTRLGRP_DRAMTIMING3_TRC_LSB)                |
65                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING3_TMRD <<
66                         SDR_CTRLGRP_DRAMTIMING3_TMRD_LSB)               |
67                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING3_TCCD <<
68                         SDR_CTRLGRP_DRAMTIMING3_TCCD_LSB),
69         .dram_timing4 =
70                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING4_SELFRFSHEXIT <<
71                         SDR_CTRLGRP_DRAMTIMING4_SELFRFSHEXIT_LSB)       |
72                 (CONFIG_HPS_SDR_CTRLCFG_DRAMTIMING4_PWRDOWNEXIT <<
73                         SDR_CTRLGRP_DRAMTIMING4_PWRDOWNEXIT_LSB),
74         .lowpwr_timing =
75                 (CONFIG_HPS_SDR_CTRLCFG_LOWPWRTIMING_AUTOPDCYCLES <<
76                         SDR_CTRLGRP_LOWPWRTIMING_AUTOPDCYCLES_LSB)      |
77                 (CONFIG_HPS_SDR_CTRLCFG_LOWPWRTIMING_CLKDISABLECYCLES <<
78                         SDR_CTRLGRP_LOWPWRTIMING_CLKDISABLECYCLES_LSB),
79         .dram_odt =
80                 (CONFIG_HPS_SDR_CTRLCFG_DRAMODT_READ <<
81                         SDR_CTRLGRP_DRAMODT_READ_LSB)                   |
82                 (CONFIG_HPS_SDR_CTRLCFG_DRAMODT_WRITE <<
83                         SDR_CTRLGRP_DRAMODT_WRITE_LSB),
84         .dram_addrw =
85                 (CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_COLBITS <<
86                         SDR_CTRLGRP_DRAMADDRW_COLBITS_LSB)              |
87                 (CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_ROWBITS <<
88                         SDR_CTRLGRP_DRAMADDRW_ROWBITS_LSB)              |
89                 (CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_BANKBITS <<
90                         SDR_CTRLGRP_DRAMADDRW_BANKBITS_LSB)             |
91                 ((CONFIG_HPS_SDR_CTRLCFG_DRAMADDRW_CSBITS - 1) <<
92                         SDR_CTRLGRP_DRAMADDRW_CSBITS_LSB),
93         .dram_if_width =
94                 (CONFIG_HPS_SDR_CTRLCFG_DRAMIFWIDTH_IFWIDTH <<
95                         SDR_CTRLGRP_DRAMIFWIDTH_IFWIDTH_LSB),
96         .dram_dev_width =
97                 (CONFIG_HPS_SDR_CTRLCFG_DRAMDEVWIDTH_DEVWIDTH <<
98                         SDR_CTRLGRP_DRAMDEVWIDTH_DEVWIDTH_LSB),
99         .dram_intr =
100                 (CONFIG_HPS_SDR_CTRLCFG_DRAMINTR_INTREN <<
101                         SDR_CTRLGRP_DRAMINTR_INTREN_LSB),
102         .lowpwr_eq =
103                 (CONFIG_HPS_SDR_CTRLCFG_LOWPWREQ_SELFRFSHMASK <<
104                         SDR_CTRLGRP_LOWPWREQ_SELFRFSHMASK_LSB),
105         .static_cfg =
106                 (CONFIG_HPS_SDR_CTRLCFG_STATICCFG_MEMBL <<
107                         SDR_CTRLGRP_STATICCFG_MEMBL_LSB)                |
108                 (CONFIG_HPS_SDR_CTRLCFG_STATICCFG_USEECCASDATA <<
109                         SDR_CTRLGRP_STATICCFG_USEECCASDATA_LSB),
110         .ctrl_width =
111                 (CONFIG_HPS_SDR_CTRLCFG_CTRLWIDTH_CTRLWIDTH <<
112                         SDR_CTRLGRP_CTRLWIDTH_CTRLWIDTH_LSB),
113         .cport_width =
114                 (CONFIG_HPS_SDR_CTRLCFG_CPORTWIDTH_CPORTWIDTH <<
115                         SDR_CTRLGRP_CPORTWIDTH_CMDPORTWIDTH_LSB),
116         .cport_wmap =
117                 (CONFIG_HPS_SDR_CTRLCFG_CPORTWMAP_CPORTWMAP <<
118                         SDR_CTRLGRP_CPORTWMAP_CPORTWFIFOMAP_LSB),
119         .cport_rmap =
120                 (CONFIG_HPS_SDR_CTRLCFG_CPORTRMAP_CPORTRMAP <<
121                         SDR_CTRLGRP_CPORTRMAP_CPORTRFIFOMAP_LSB),
122         .rfifo_cmap =
123                 (CONFIG_HPS_SDR_CTRLCFG_RFIFOCMAP_RFIFOCMAP <<
124                         SDR_CTRLGRP_RFIFOCMAP_RFIFOCPORTMAP_LSB),
125         .wfifo_cmap =
126                 (CONFIG_HPS_SDR_CTRLCFG_WFIFOCMAP_WFIFOCMAP <<
127                         SDR_CTRLGRP_WFIFOCMAP_WFIFOCPORTMAP_LSB),
128         .cport_rdwr =
129                 (CONFIG_HPS_SDR_CTRLCFG_CPORTRDWR_CPORTRDWR <<
130                         SDR_CTRLGRP_CPORTRDWR_CPORTRDWR_LSB),
131         .port_cfg =
132                 (CONFIG_HPS_SDR_CTRLCFG_PORTCFG_AUTOPCHEN <<
133                         SDR_CTRLGRP_PORTCFG_AUTOPCHEN_LSB),
134         .fpgaport_rst = CONFIG_HPS_SDR_CTRLCFG_FPGAPORTRST,
135         .fifo_cfg =
136                 (CONFIG_HPS_SDR_CTRLCFG_FIFOCFG_SYNCMODE <<
137                         SDR_CTRLGRP_FIFOCFG_SYNCMODE_LSB)               |
138                 (CONFIG_HPS_SDR_CTRLCFG_FIFOCFG_INCSYNC <<
139                         SDR_CTRLGRP_FIFOCFG_INCSYNC_LSB),
140         .mp_priority =
141                 (CONFIG_HPS_SDR_CTRLCFG_MPPRIORITY_USERPRIORITY <<
142                         SDR_CTRLGRP_MPPRIORITY_USERPRIORITY_LSB),
143         .mp_weight0 =
144                 (CONFIG_HPS_SDR_CTRLCFG_MPWIEIGHT_0_STATICWEIGHT_31_0 <<
145                         SDR_CTRLGRP_MPWEIGHT_MPWEIGHT_0_STATICWEIGHT_31_0_LSB),
146         .mp_weight1 =
147                 (CONFIG_HPS_SDR_CTRLCFG_MPWIEIGHT_1_STATICWEIGHT_49_32 <<
148                         SDR_CTRLGRP_MPWEIGHT_MPWEIGHT_1_STATICWEIGHT_49_32_LSB) |
149                 (CONFIG_HPS_SDR_CTRLCFG_MPWIEIGHT_1_SUMOFWEIGHT_13_0 <<
150                         SDR_CTRLGRP_MPWEIGHT_MPWEIGHT_1_SUMOFWEIGHTS_13_0_LSB),
151         .mp_weight2 =
152                 (CONFIG_HPS_SDR_CTRLCFG_MPWIEIGHT_2_SUMOFWEIGHT_45_14 <<
153                         SDR_CTRLGRP_MPWEIGHT_MPWEIGHT_2_SUMOFWEIGHTS_45_14_LSB),
154         .mp_weight3 =
155                 (CONFIG_HPS_SDR_CTRLCFG_MPWIEIGHT_3_SUMOFWEIGHT_63_46 <<
156                         SDR_CTRLGRP_MPWEIGHT_MPWEIGHT_3_SUMOFWEIGHTS_63_46_LSB),
157         .mp_pacing0 =
158                 (CONFIG_HPS_SDR_CTRLCFG_MPPACING_0_THRESHOLD1_31_0 <<
159                         SDR_CTRLGRP_MPPACING_MPPACING_0_THRESHOLD1_31_0_LSB),
160         .mp_pacing1 =
161                 (CONFIG_HPS_SDR_CTRLCFG_MPPACING_1_THRESHOLD1_59_32 <<
162                         SDR_CTRLGRP_MPPACING_MPPACING_1_THRESHOLD1_59_32_LSB) |
163                 (CONFIG_HPS_SDR_CTRLCFG_MPPACING_1_THRESHOLD2_3_0 <<
164                         SDR_CTRLGRP_MPPACING_MPPACING_1_THRESHOLD2_3_0_LSB),
165         .mp_pacing2 =
166                 (CONFIG_HPS_SDR_CTRLCFG_MPPACING_2_THRESHOLD2_35_4 <<
167                         SDR_CTRLGRP_MPPACING_MPPACING_2_THRESHOLD2_35_4_LSB),
168         .mp_pacing3 =
169                 (CONFIG_HPS_SDR_CTRLCFG_MPPACING_3_THRESHOLD2_59_36 <<
170                         SDR_CTRLGRP_MPPACING_MPPACING_3_THRESHOLD2_59_36_LSB),
171         .mp_threshold0 =
172                 (CONFIG_HPS_SDR_CTRLCFG_MPTHRESHOLDRST_0_THRESHOLDRSTCYCLES_31_0 <<
173                         SDR_CTRLGRP_MPTHRESHOLDRST_0_THRESHOLDRSTCYCLES_31_0_LSB),
174         .mp_threshold1 =
175                 (CONFIG_HPS_SDR_CTRLCFG_MPTHRESHOLDRST_1_THRESHOLDRSTCYCLES_63_32 <<
176                         SDR_CTRLGRP_MPTHRESHOLDRST_1_THRESHOLDRSTCYCLES_63_32_LSB),
177         .mp_threshold2 =
178                 (CONFIG_HPS_SDR_CTRLCFG_MPTHRESHOLDRST_2_THRESHOLDRSTCYCLES_79_64 <<
179                         SDR_CTRLGRP_MPTHRESHOLDRST_2_THRESHOLDRSTCYCLES_79_64_LSB),
180         .phy_ctrl0 = CONFIG_HPS_SDR_CTRLCFG_PHYCTRL_PHYCTRL_0,
181 };
182
183 static const struct socfpga_sdram_rw_mgr_config rw_mgr_config = {
184         .activate_0_and_1               = RW_MGR_ACTIVATE_0_AND_1,
185         .activate_0_and_1_wait1         = RW_MGR_ACTIVATE_0_AND_1_WAIT1,
186         .activate_0_and_1_wait2         = RW_MGR_ACTIVATE_0_AND_1_WAIT2,
187         .activate_1                     = RW_MGR_ACTIVATE_1,
188         .clear_dqs_enable               = RW_MGR_CLEAR_DQS_ENABLE,
189         .guaranteed_read                = RW_MGR_GUARANTEED_READ,
190         .guaranteed_read_cont           = RW_MGR_GUARANTEED_READ_CONT,
191         .guaranteed_write               = RW_MGR_GUARANTEED_WRITE,
192         .guaranteed_write_wait0         = RW_MGR_GUARANTEED_WRITE_WAIT0,
193         .guaranteed_write_wait1         = RW_MGR_GUARANTEED_WRITE_WAIT1,
194         .guaranteed_write_wait2         = RW_MGR_GUARANTEED_WRITE_WAIT2,
195         .guaranteed_write_wait3         = RW_MGR_GUARANTEED_WRITE_WAIT3,
196         .idle                           = RW_MGR_IDLE,
197         .idle_loop1                     = RW_MGR_IDLE_LOOP1,
198         .idle_loop2                     = RW_MGR_IDLE_LOOP2,
199         .init_reset_0_cke_0             = RW_MGR_INIT_RESET_0_CKE_0,
200         .init_reset_1_cke_0             = RW_MGR_INIT_RESET_1_CKE_0,
201         .lfsr_wr_rd_bank_0              = RW_MGR_LFSR_WR_RD_BANK_0,
202         .lfsr_wr_rd_bank_0_data         = RW_MGR_LFSR_WR_RD_BANK_0_DATA,
203         .lfsr_wr_rd_bank_0_dqs          = RW_MGR_LFSR_WR_RD_BANK_0_DQS,
204         .lfsr_wr_rd_bank_0_nop          = RW_MGR_LFSR_WR_RD_BANK_0_NOP,
205         .lfsr_wr_rd_bank_0_wait         = RW_MGR_LFSR_WR_RD_BANK_0_WAIT,
206         .lfsr_wr_rd_bank_0_wl_1         = RW_MGR_LFSR_WR_RD_BANK_0_WL_1,
207         .lfsr_wr_rd_dm_bank_0           = RW_MGR_LFSR_WR_RD_DM_BANK_0,
208         .lfsr_wr_rd_dm_bank_0_data      = RW_MGR_LFSR_WR_RD_DM_BANK_0_DATA,
209         .lfsr_wr_rd_dm_bank_0_dqs       = RW_MGR_LFSR_WR_RD_DM_BANK_0_DQS,
210         .lfsr_wr_rd_dm_bank_0_nop       = RW_MGR_LFSR_WR_RD_DM_BANK_0_NOP,
211         .lfsr_wr_rd_dm_bank_0_wait      = RW_MGR_LFSR_WR_RD_DM_BANK_0_WAIT,
212         .lfsr_wr_rd_dm_bank_0_wl_1      = RW_MGR_LFSR_WR_RD_DM_BANK_0_WL_1,
213         .mrs0_dll_reset                 = RW_MGR_MRS0_DLL_RESET,
214         .mrs0_dll_reset_mirr            = RW_MGR_MRS0_DLL_RESET_MIRR,
215         .mrs0_user                      = RW_MGR_MRS0_USER,
216         .mrs0_user_mirr                 = RW_MGR_MRS0_USER_MIRR,
217         .mrs1                           = RW_MGR_MRS1,
218         .mrs1_mirr                      = RW_MGR_MRS1_MIRR,
219         .mrs2                           = RW_MGR_MRS2,
220         .mrs2_mirr                      = RW_MGR_MRS2_MIRR,
221         .mrs3                           = RW_MGR_MRS3,
222         .mrs3_mirr                      = RW_MGR_MRS3_MIRR,
223         .precharge_all                  = RW_MGR_PRECHARGE_ALL,
224         .read_b2b                       = RW_MGR_READ_B2B,
225         .read_b2b_wait1                 = RW_MGR_READ_B2B_WAIT1,
226         .read_b2b_wait2                 = RW_MGR_READ_B2B_WAIT2,
227         .refresh_all                    = RW_MGR_REFRESH_ALL,
228         .rreturn                        = RW_MGR_RETURN,
229         .sgle_read                      = RW_MGR_SGLE_READ,
230         .zqcl                           = RW_MGR_ZQCL,
231
232         .true_mem_data_mask_width       = RW_MGR_TRUE_MEM_DATA_MASK_WIDTH,
233         .mem_address_mirroring          = RW_MGR_MEM_ADDRESS_MIRRORING,
234         .mem_data_mask_width            = RW_MGR_MEM_DATA_MASK_WIDTH,
235         .mem_data_width                 = RW_MGR_MEM_DATA_WIDTH,
236         .mem_dq_per_read_dqs            = RW_MGR_MEM_DQ_PER_READ_DQS,
237         .mem_dq_per_write_dqs           = RW_MGR_MEM_DQ_PER_WRITE_DQS,
238         .mem_if_read_dqs_width          = RW_MGR_MEM_IF_READ_DQS_WIDTH,
239         .mem_if_write_dqs_width         = RW_MGR_MEM_IF_WRITE_DQS_WIDTH,
240         .mem_number_of_cs_per_dimm      = RW_MGR_MEM_NUMBER_OF_CS_PER_DIMM,
241         .mem_number_of_ranks            = RW_MGR_MEM_NUMBER_OF_RANKS,
242         .mem_virtual_groups_per_read_dqs =
243                 RW_MGR_MEM_VIRTUAL_GROUPS_PER_READ_DQS,
244         .mem_virtual_groups_per_write_dqs =
245                 RW_MGR_MEM_VIRTUAL_GROUPS_PER_WRITE_DQS,
246 };
247
248 struct socfpga_sdram_io_config io_config = {
249         .delay_per_dchain_tap           = IO_DELAY_PER_DCHAIN_TAP,
250         .delay_per_dqs_en_dchain_tap    = IO_DELAY_PER_DQS_EN_DCHAIN_TAP,
251         .delay_per_opa_tap              = IO_DELAY_PER_OPA_TAP,
252         .dll_chain_length               = IO_DLL_CHAIN_LENGTH,
253         .dqdqs_out_phase_max            = IO_DQDQS_OUT_PHASE_MAX,
254         .dqs_en_delay_max               = IO_DQS_EN_DELAY_MAX,
255         .dqs_en_delay_offset            = IO_DQS_EN_DELAY_OFFSET,
256         .dqs_en_phase_max               = IO_DQS_EN_PHASE_MAX,
257         .dqs_in_delay_max               = IO_DQS_IN_DELAY_MAX,
258         .dqs_in_reserve                 = IO_DQS_IN_RESERVE,
259         .dqs_out_reserve                = IO_DQS_OUT_RESERVE,
260         .io_in_delay_max                = IO_IO_IN_DELAY_MAX,
261         .io_out1_delay_max              = IO_IO_OUT1_DELAY_MAX,
262         .io_out2_delay_max              = IO_IO_OUT2_DELAY_MAX,
263         .shift_dqs_en_when_shift_dqs    = IO_SHIFT_DQS_EN_WHEN_SHIFT_DQS,
264 };
265
266 struct socfpga_sdram_misc_config misc_config = {
267         .afi_rate_ratio                 = AFI_RATE_RATIO,
268         .calib_lfifo_offset             = CALIB_LFIFO_OFFSET,
269         .calib_vfifo_offset             = CALIB_VFIFO_OFFSET,
270         .enable_super_quick_calibration = ENABLE_SUPER_QUICK_CALIBRATION,
271         .max_latency_count_width        = MAX_LATENCY_COUNT_WIDTH,
272         .read_valid_fifo_size           = READ_VALID_FIFO_SIZE,
273         .reg_file_init_seq_signature    = REG_FILE_INIT_SEQ_SIGNATURE,
274         .tinit_cntr0_val                = TINIT_CNTR0_VAL,
275         .tinit_cntr1_val                = TINIT_CNTR1_VAL,
276         .tinit_cntr2_val                = TINIT_CNTR2_VAL,
277         .treset_cntr0_val               = TRESET_CNTR0_VAL,
278         .treset_cntr1_val               = TRESET_CNTR1_VAL,
279         .treset_cntr2_val               = TRESET_CNTR2_VAL,
280 };
281
282 const struct socfpga_sdram_config *socfpga_get_sdram_config(void)
283 {
284         return &sdram_config;
285 }
286
287 void socfpga_get_seq_ac_init(const u32 **init, unsigned int *nelem)
288 {
289         *init = ac_rom_init;
290         *nelem = ARRAY_SIZE(ac_rom_init);
291 }
292
293 void socfpga_get_seq_inst_init(const u32 **init, unsigned int *nelem)
294 {
295         *init = inst_rom_init;
296         *nelem = ARRAY_SIZE(inst_rom_init);
297 }
298
299 const struct socfpga_sdram_rw_mgr_config *socfpga_get_sdram_rwmgr_config(void)
300 {
301         return &rw_mgr_config;
302 }
303
304 const struct socfpga_sdram_io_config *socfpga_get_sdram_io_config(void)
305 {
306         return &io_config;
307 }
308
309 const struct socfpga_sdram_misc_config *socfpga_get_sdram_misc_config(void)
310 {
311         return &misc_config;
312 }