2 * Copyright 2014 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <fsl_ddr_sdram.h>
10 #include <asm/processor.h>
11 #include <fsl_immap.h>
14 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
15 #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
19 * regs has the to-be-set values for DDR controller registers
20 * ctrl_num is the DDR controller number
21 * step: 0 goes through the initialization in one pass
22 * 1 sets registers and returns before enabling controller
23 * 2 resumes from step 1 and continues to initialize
24 * Dividing the initialization to two steps to deassert DDR reset signal
25 * to comply with JEDEC specs for RDIMMs.
27 void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t
*regs
,
28 unsigned int ctrl_num
, int step
)
30 unsigned int i
, bus_width
;
31 struct ccsr_ddr __iomem
*ddr
;
33 u32 total_gb_size_per_controller
;
38 ddr
= (void *)CONFIG_SYS_FSL_DDR_ADDR
;
40 #if defined(CONFIG_SYS_FSL_DDR2_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 1)
42 ddr
= (void *)CONFIG_SYS_FSL_DDR2_ADDR
;
45 #if defined(CONFIG_SYS_FSL_DDR3_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 2)
47 ddr
= (void *)CONFIG_SYS_FSL_DDR3_ADDR
;
50 #if defined(CONFIG_SYS_FSL_DDR4_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 3)
52 ddr
= (void *)CONFIG_SYS_FSL_DDR4_ADDR
;
56 printf("%s unexpected ctrl_num = %u\n", __func__
, ctrl_num
);
64 ddr_out32(&ddr
->eor
, regs
->ddr_eor
);
66 ddr_out32(&ddr
->sdram_clk_cntl
, regs
->ddr_sdram_clk_cntl
);
68 for (i
= 0; i
< CONFIG_CHIP_SELECTS_PER_CTRL
; i
++) {
70 ddr_out32(&ddr
->cs0_bnds
, regs
->cs
[i
].bnds
);
71 ddr_out32(&ddr
->cs0_config
, regs
->cs
[i
].config
);
72 ddr_out32(&ddr
->cs0_config_2
, regs
->cs
[i
].config_2
);
75 ddr_out32(&ddr
->cs1_bnds
, regs
->cs
[i
].bnds
);
76 ddr_out32(&ddr
->cs1_config
, regs
->cs
[i
].config
);
77 ddr_out32(&ddr
->cs1_config_2
, regs
->cs
[i
].config_2
);
80 ddr_out32(&ddr
->cs2_bnds
, regs
->cs
[i
].bnds
);
81 ddr_out32(&ddr
->cs2_config
, regs
->cs
[i
].config
);
82 ddr_out32(&ddr
->cs2_config_2
, regs
->cs
[i
].config_2
);
85 ddr_out32(&ddr
->cs3_bnds
, regs
->cs
[i
].bnds
);
86 ddr_out32(&ddr
->cs3_config
, regs
->cs
[i
].config
);
87 ddr_out32(&ddr
->cs3_config_2
, regs
->cs
[i
].config_2
);
91 ddr_out32(&ddr
->timing_cfg_3
, regs
->timing_cfg_3
);
92 ddr_out32(&ddr
->timing_cfg_0
, regs
->timing_cfg_0
);
93 ddr_out32(&ddr
->timing_cfg_1
, regs
->timing_cfg_1
);
94 ddr_out32(&ddr
->timing_cfg_2
, regs
->timing_cfg_2
);
95 ddr_out32(&ddr
->timing_cfg_4
, regs
->timing_cfg_4
);
96 ddr_out32(&ddr
->timing_cfg_5
, regs
->timing_cfg_5
);
97 ddr_out32(&ddr
->timing_cfg_6
, regs
->timing_cfg_6
);
98 ddr_out32(&ddr
->timing_cfg_7
, regs
->timing_cfg_7
);
99 ddr_out32(&ddr
->timing_cfg_8
, regs
->timing_cfg_8
);
100 ddr_out32(&ddr
->timing_cfg_9
, regs
->timing_cfg_9
);
101 ddr_out32(&ddr
->ddr_zq_cntl
, regs
->ddr_zq_cntl
);
102 ddr_out32(&ddr
->dq_map_0
, regs
->dq_map_0
);
103 ddr_out32(&ddr
->dq_map_1
, regs
->dq_map_1
);
104 ddr_out32(&ddr
->dq_map_2
, regs
->dq_map_2
);
105 ddr_out32(&ddr
->dq_map_3
, regs
->dq_map_3
);
106 ddr_out32(&ddr
->sdram_cfg_3
, regs
->ddr_sdram_cfg_3
);
107 ddr_out32(&ddr
->sdram_mode
, regs
->ddr_sdram_mode
);
108 ddr_out32(&ddr
->sdram_mode_2
, regs
->ddr_sdram_mode_2
);
109 ddr_out32(&ddr
->sdram_mode_3
, regs
->ddr_sdram_mode_3
);
110 ddr_out32(&ddr
->sdram_mode_4
, regs
->ddr_sdram_mode_4
);
111 ddr_out32(&ddr
->sdram_mode_5
, regs
->ddr_sdram_mode_5
);
112 ddr_out32(&ddr
->sdram_mode_6
, regs
->ddr_sdram_mode_6
);
113 ddr_out32(&ddr
->sdram_mode_7
, regs
->ddr_sdram_mode_7
);
114 ddr_out32(&ddr
->sdram_mode_8
, regs
->ddr_sdram_mode_8
);
115 ddr_out32(&ddr
->sdram_mode_9
, regs
->ddr_sdram_mode_9
);
116 ddr_out32(&ddr
->sdram_mode_10
, regs
->ddr_sdram_mode_10
);
117 ddr_out32(&ddr
->sdram_mode_11
, regs
->ddr_sdram_mode_11
);
118 ddr_out32(&ddr
->sdram_mode_12
, regs
->ddr_sdram_mode_12
);
119 ddr_out32(&ddr
->sdram_mode_13
, regs
->ddr_sdram_mode_13
);
120 ddr_out32(&ddr
->sdram_mode_14
, regs
->ddr_sdram_mode_14
);
121 ddr_out32(&ddr
->sdram_mode_15
, regs
->ddr_sdram_mode_15
);
122 ddr_out32(&ddr
->sdram_mode_16
, regs
->ddr_sdram_mode_16
);
123 ddr_out32(&ddr
->sdram_md_cntl
, regs
->ddr_sdram_md_cntl
);
124 ddr_out32(&ddr
->sdram_interval
, regs
->ddr_sdram_interval
);
125 ddr_out32(&ddr
->sdram_data_init
, regs
->ddr_data_init
);
126 ddr_out32(&ddr
->ddr_wrlvl_cntl
, regs
->ddr_wrlvl_cntl
);
127 #ifndef CONFIG_SYS_FSL_DDR_EMU
129 * Skip these two registers if running on emulator
130 * because emulator doesn't have skew between bytes.
133 if (regs
->ddr_wrlvl_cntl_2
)
134 ddr_out32(&ddr
->ddr_wrlvl_cntl_2
, regs
->ddr_wrlvl_cntl_2
);
135 if (regs
->ddr_wrlvl_cntl_3
)
136 ddr_out32(&ddr
->ddr_wrlvl_cntl_3
, regs
->ddr_wrlvl_cntl_3
);
139 ddr_out32(&ddr
->ddr_sr_cntr
, regs
->ddr_sr_cntr
);
140 ddr_out32(&ddr
->ddr_sdram_rcw_1
, regs
->ddr_sdram_rcw_1
);
141 ddr_out32(&ddr
->ddr_sdram_rcw_2
, regs
->ddr_sdram_rcw_2
);
142 ddr_out32(&ddr
->ddr_sdram_rcw_3
, regs
->ddr_sdram_rcw_3
);
143 ddr_out32(&ddr
->ddr_sdram_rcw_4
, regs
->ddr_sdram_rcw_4
);
144 ddr_out32(&ddr
->ddr_sdram_rcw_5
, regs
->ddr_sdram_rcw_5
);
145 ddr_out32(&ddr
->ddr_sdram_rcw_6
, regs
->ddr_sdram_rcw_6
);
146 ddr_out32(&ddr
->ddr_cdr1
, regs
->ddr_cdr1
);
147 #ifdef CONFIG_DEEP_SLEEP
148 if (is_warm_boot()) {
149 ddr_out32(&ddr
->sdram_cfg_2
,
150 regs
->ddr_sdram_cfg_2
& ~SDRAM_CFG2_D_INIT
);
151 ddr_out32(&ddr
->init_addr
, CONFIG_SYS_SDRAM_BASE
);
152 ddr_out32(&ddr
->init_ext_addr
, DDR_INIT_ADDR_EXT_UIA
);
154 /* DRAM VRef will not be trained */
155 ddr_out32(&ddr
->ddr_cdr2
,
156 regs
->ddr_cdr2
& ~DDR_CDR2_VREF_TRAIN_EN
);
160 ddr_out32(&ddr
->sdram_cfg_2
, regs
->ddr_sdram_cfg_2
);
161 ddr_out32(&ddr
->init_addr
, regs
->ddr_init_addr
);
162 ddr_out32(&ddr
->init_ext_addr
, regs
->ddr_init_ext_addr
);
163 ddr_out32(&ddr
->ddr_cdr2
, regs
->ddr_cdr2
);
165 ddr_out32(&ddr
->err_disable
, regs
->err_disable
);
166 ddr_out32(&ddr
->err_int_en
, regs
->err_int_en
);
167 for (i
= 0; i
< 32; i
++) {
168 if (regs
->debug
[i
]) {
169 debug("Write to debug_%d as %08x\n",
170 i
+1, regs
->debug
[i
]);
171 ddr_out32(&ddr
->debug
[i
], regs
->debug
[i
]);
174 #ifdef CONFIG_SYS_FSL_ERRATUM_A008378
175 /* Erratum applies when accumulated ECC is used, or DBI is enabled */
176 #define IS_ACC_ECC_EN(v) ((v) & 0x4)
177 #define IS_DBI(v) ((((v) >> 12) & 0x3) == 0x2)
178 if (IS_ACC_ECC_EN(regs
->ddr_sdram_cfg
) ||
179 IS_DBI(regs
->ddr_sdram_cfg_3
))
180 ddr_setbits32(ddr
->debug
[28], 0x9 << 20);
184 * For RDIMMs, JEDEC spec requires clocks to be stable before reset is
185 * deasserted. Clocks start when any chip select is enabled and clock
186 * control register is set. Because all DDR components are connected to
187 * one reset signal, this needs to be done in two steps. Step 1 is to
188 * get the clocks started. Step 2 resumes after reset signal is
197 /* Set, but do not enable the memory */
198 temp_sdram_cfg
= regs
->ddr_sdram_cfg
;
199 temp_sdram_cfg
&= ~(SDRAM_CFG_MEM_EN
);
200 ddr_out32(&ddr
->sdram_cfg
, temp_sdram_cfg
);
203 * 500 painful micro-seconds must elapse between
204 * the DDR clock setup and the DDR config enable.
205 * DDR2 need 200 us, and DDR3 need 500 us from spec,
206 * we choose the max, that is 500 us for all of case.
212 #ifdef CONFIG_DEEP_SLEEP
213 if (is_warm_boot()) {
214 /* enter self-refresh */
215 temp_sdram_cfg
= ddr_in32(&ddr
->sdram_cfg_2
);
216 temp_sdram_cfg
|= SDRAM_CFG2_FRC_SR
;
217 ddr_out32(&ddr
->sdram_cfg_2
, temp_sdram_cfg
);
218 /* do board specific memory setup */
219 board_mem_sleep_setup();
221 temp_sdram_cfg
= (ddr_in32(&ddr
->sdram_cfg
) | SDRAM_CFG_BI
);
224 temp_sdram_cfg
= ddr_in32(&ddr
->sdram_cfg
) & ~SDRAM_CFG_BI
;
225 /* Let the controller go */
226 ddr_out32(&ddr
->sdram_cfg
, temp_sdram_cfg
| SDRAM_CFG_MEM_EN
);
230 total_gb_size_per_controller
= 0;
231 for (i
= 0; i
< CONFIG_CHIP_SELECTS_PER_CTRL
; i
++) {
232 if (!(regs
->cs
[i
].config
& 0x80000000))
234 total_gb_size_per_controller
+= 1 << (
235 ((regs
->cs
[i
].config
>> 14) & 0x3) + 2 +
236 ((regs
->cs
[i
].config
>> 8) & 0x7) + 12 +
237 ((regs
->cs
[i
].config
>> 4) & 0x3) + 0 +
238 ((regs
->cs
[i
].config
>> 0) & 0x7) + 8 +
239 3 - ((regs
->ddr_sdram_cfg
>> 19) & 0x3) -
240 26); /* minus 26 (count of 64M) */
242 if (fsl_ddr_get_intl3r() & 0x80000000) /* 3-way interleaving */
243 total_gb_size_per_controller
*= 3;
244 else if (regs
->cs
[0].config
& 0x20000000) /* 2-way interleaving */
245 total_gb_size_per_controller
<<= 1;
247 * total memory / bus width = transactions needed
248 * transactions needed / data rate = seconds
249 * to add plenty of buffer, double the time
250 * For example, 2GB on 666MT/s 64-bit bus takes about 402ms
251 * Let's wait for 800ms
253 bus_width
= 3 - ((ddr_in32(&ddr
->sdram_cfg
) & SDRAM_CFG_DBW_MASK
)
254 >> SDRAM_CFG_DBW_SHIFT
);
255 timeout
= ((total_gb_size_per_controller
<< (6 - bus_width
)) * 100 /
256 (get_ddr_freq(0) >> 20)) << 2;
257 total_gb_size_per_controller
>>= 4; /* shift down to gb size */
258 debug("total %d GB\n", total_gb_size_per_controller
);
259 debug("Need to wait up to %d * 10ms\n", timeout
);
261 /* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done. */
262 while ((ddr_in32(&ddr
->sdram_cfg_2
) & SDRAM_CFG2_D_INIT
) &&
264 udelay(10000); /* throttle polling rate */
269 printf("Waiting for D_INIT timeout. Memory may not work.\n");
270 #ifdef CONFIG_DEEP_SLEEP
271 if (is_warm_boot()) {
272 /* exit self-refresh */
273 temp_sdram_cfg
= ddr_in32(&ddr
->sdram_cfg_2
);
274 temp_sdram_cfg
&= ~SDRAM_CFG2_FRC_SR
;
275 ddr_out32(&ddr
->sdram_cfg_2
, temp_sdram_cfg
);