1 /*
2  * Copyright 2010-2011 Freescale Semiconductor, Inc.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * Version 2 as published by the Free Software Foundation.
7  */
8 
9 #include <common.h>
10 #include <asm/mmu.h>
11 #include <asm/immap_85xx.h>
12 #include <asm/processor.h>
13 #include <asm/fsl_ddr_sdram.h>
14 #include <asm/fsl_ddr_dimm_params.h>
15 #include <asm/io.h>
16 #include <asm/fsl_law.h>
17 
18 #ifdef CONFIG_SYS_DDR_RAW_TIMING
19 #if	defined(CONFIG_P1020RDB_PROTO) || \
20 	defined(CONFIG_P1021RDB) || \
21 	defined(CONFIG_P1020UTM)
22 /* Micron MT41J256M8_187E */
23 dimm_params_t ddr_raw_timing = {
24 	.n_ranks = 1,
25 	.rank_density = 1073741824u,
26 	.capacity = 1073741824u,
27 	.primary_sdram_width = 32,
28 	.ec_sdram_width = 0,
29 	.registered_dimm = 0,
30 	.mirrored_dimm = 0,
31 	.n_row_addr = 15,
32 	.n_col_addr = 10,
33 	.n_banks_per_sdram_device = 8,
34 	.edc_config = 0,
35 	.burst_lengths_bitmask = 0x0c,
36 
37 	.tCKmin_X_ps = 1870,
38 	.caslat_X = 0x1e << 4,	/* 5,6,7,8 */
39 	.tAA_ps = 13125,
40 	.tWR_ps = 15000,
41 	.tRCD_ps = 13125,
42 	.tRRD_ps = 7500,
43 	.tRP_ps = 13125,
44 	.tRAS_ps = 37500,
45 	.tRC_ps = 50625,
46 	.tRFC_ps = 160000,
47 	.tWTR_ps = 7500,
48 	.tRTP_ps = 7500,
49 	.refresh_rate_ps = 7800000,
50 	.tFAW_ps = 37500,
51 };
52 #elif defined(CONFIG_P2020RDB)
53 /* Micron MT41J128M16_15E */
54 dimm_params_t ddr_raw_timing = {
55 	.n_ranks = 1,
56 	.rank_density = 1073741824u,
57 	.capacity = 1073741824u,
58 	.primary_sdram_width = 64,
59 	.ec_sdram_width = 0,
60 	.registered_dimm = 0,
61 	.mirrored_dimm = 0,
62 	.n_row_addr = 14,
63 	.n_col_addr = 10,
64 	.n_banks_per_sdram_device = 8,
65 	.edc_config = 0,
66 	.burst_lengths_bitmask = 0x0c,
67 
68 	.tCKmin_X_ps = 1500,
69 	.caslat_X = 0x7e << 4,	/* 5,6,7,8,9,10 */
70 	.tAA_ps = 13500,
71 	.tWR_ps = 15000,
72 	.tRCD_ps = 13500,
73 	.tRRD_ps = 6000,
74 	.tRP_ps = 13500,
75 	.tRAS_ps = 36000,
76 	.tRC_ps = 49500,
77 	.tRFC_ps = 160000,
78 	.tWTR_ps = 7500,
79 	.tRTP_ps = 7500,
80 	.refresh_rate_ps = 7800000,
81 	.tFAW_ps = 30000,
82 };
83 #elif defined(CONFIG_P1020MBG)
84 /* Micron MT41J512M8_187E */
85 dimm_params_t ddr_raw_timing = {
86 	.n_ranks = 2,
87 	.rank_density = 1073741824u,
88 	.capacity = 2147483648u,
89 	.primary_sdram_width = 32,
90 	.ec_sdram_width = 0,
91 	.registered_dimm = 0,
92 	.mirrored_dimm = 0,
93 	.n_row_addr = 15,
94 	.n_col_addr = 10,
95 	.n_banks_per_sdram_device = 8,
96 	.edc_config = 0,
97 	.burst_lengths_bitmask = 0x0c,
98 
99 	.tCKmin_X_ps = 1870,
100 	.caslat_X = 0x1e << 4,	/* 5,6,7,8 */
101 	.tAA_ps = 13125,
102 	.tWR_ps = 15000,
103 	.tRCD_ps = 13125,
104 	.tRRD_ps = 7500,
105 	.tRP_ps = 13125,
106 	.tRAS_ps = 37500,
107 	.tRC_ps = 50625,
108 	.tRFC_ps = 160000,
109 	.tWTR_ps = 7500,
110 	.tRTP_ps = 7500,
111 	.refresh_rate_ps = 7800000,
112 	.tFAW_ps = 37500,
113 };
114 #elif defined(CONFIG_P1020RDB)
115 /*
116  * Samsung K4B2G0846C-HCF8
117  * The following timing are for "downshift"
118  * i.e. to use CL9 part as CL7
119  * otherwise, tAA, tRCD, tRP will be 13500ps
120  * and tRC will be 49500ps
121  */
122 dimm_params_t ddr_raw_timing = {
123 	.n_ranks = 1,
124 	.rank_density = 1073741824u,
125 	.capacity = 1073741824u,
126 	.primary_sdram_width = 32,
127 	.ec_sdram_width = 0,
128 	.registered_dimm = 0,
129 	.mirrored_dimm = 0,
130 	.n_row_addr = 15,
131 	.n_col_addr = 10,
132 	.n_banks_per_sdram_device = 8,
133 	.edc_config = 0,
134 	.burst_lengths_bitmask = 0x0c,
135 
136 	.tCKmin_X_ps = 1875,
137 	.caslat_X = 0x1e << 4,	/* 5,6,7,8 */
138 	.tAA_ps = 13125,
139 	.tWR_ps = 15000,
140 	.tRCD_ps = 13125,
141 	.tRRD_ps = 7500,
142 	.tRP_ps = 13125,
143 	.tRAS_ps = 37500,
144 	.tRC_ps = 50625,
145 	.tRFC_ps = 160000,
146 	.tWTR_ps = 7500,
147 	.tRTP_ps = 7500,
148 	.refresh_rate_ps = 7800000,
149 	.tFAW_ps = 37500,
150 };
151 #elif	defined(CONFIG_P1024RDB) || \
152 	defined(CONFIG_P1025RDB)
153 /*
154  * Samsung K4B2G0846C-HCH9
155  * The following timing are for "downshift"
156  * i.e. to use CL9 part as CL7
157  * otherwise, tAA, tRCD, tRP will be 13500ps
158  * and tRC will be 49500ps
159  */
160 dimm_params_t ddr_raw_timing = {
161 	.n_ranks = 1,
162 	.rank_density = 1073741824u,
163 	.capacity = 1073741824u,
164 	.primary_sdram_width = 32,
165 	.ec_sdram_width = 0,
166 	.registered_dimm = 0,
167 	.mirrored_dimm = 0,
168 	.n_row_addr = 15,
169 	.n_col_addr = 10,
170 	.n_banks_per_sdram_device = 8,
171 	.edc_config = 0,
172 	.burst_lengths_bitmask = 0x0c,
173 
174 	.tCKmin_X_ps = 1500,
175 	.caslat_X = 0x3e << 4,	/* 5,6,7,8,9 */
176 	.tAA_ps = 13125,
177 	.tWR_ps = 15000,
178 	.tRCD_ps = 13125,
179 	.tRRD_ps = 6000,
180 	.tRP_ps = 13125,
181 	.tRAS_ps = 36000,
182 	.tRC_ps = 49125,
183 	.tRFC_ps = 160000,
184 	.tWTR_ps = 7500,
185 	.tRTP_ps = 7500,
186 	.refresh_rate_ps = 7800000,
187 	.tFAW_ps = 30000,
188 };
189 #else
190 #error Missing raw timing data for this board
191 #endif
192 
193 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
194 		unsigned int controller_number,
195 		unsigned int dimm_number)
196 {
197 	const char dimm_model[] = "Fixed DDR on board";
198 
199 	if ((controller_number == 0) && (dimm_number == 0)) {
200 		memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
201 		memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
202 		memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
203 	}
204 
205 	return 0;
206 }
207 #endif /* CONFIG_SYS_DDR_RAW_TIMING */
208 
209 /* Fixed sdram init -- doesn't use serial presence detect. */
210 phys_size_t fixed_sdram(void)
211 {
212 	sys_info_t sysinfo;
213 	char buf[32];
214 	size_t ddr_size;
215 	fsl_ddr_cfg_regs_t ddr_cfg_regs = {
216 		.cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS,
217 		.cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG,
218 		.cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2,
219 #if CONFIG_CHIP_SELECTS_PER_CTRL > 1
220 		.cs[1].bnds = CONFIG_SYS_DDR_CS1_BNDS,
221 		.cs[1].config = CONFIG_SYS_DDR_CS1_CONFIG,
222 		.cs[1].config_2 = CONFIG_SYS_DDR_CS1_CONFIG_2,
223 #endif
224 		.timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3,
225 		.timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0,
226 		.timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1,
227 		.timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2,
228 		.ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL,
229 		.ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2,
230 		.ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1,
231 		.ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2,
232 		.ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL,
233 		.ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL,
234 		.ddr_data_init = CONFIG_SYS_DDR_DATA_INIT,
235 		.ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL,
236 		.ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR,
237 		.ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR,
238 		.timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4,
239 		.timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5,
240 		.ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL,
241 		.ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL,
242 		.ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR,
243 		.ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1,
244 		.ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2
245 	};
246 
247 	get_sys_info(&sysinfo);
248 	printf("Configuring DDR for %s MT/s data rate\n",
249 			strmhz(buf, sysinfo.freqDDRBus));
250 
251 	ddr_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
252 
253 	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
254 
255 	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
256 				ddr_size, LAW_TRGT_IF_DDR_1) < 0) {
257 		printf("ERROR setting Local Access Windows for DDR\n");
258 		return 0;
259 	};
260 
261 	return ddr_size;
262 }
263 
264 void fsl_ddr_board_options(memctl_options_t *popts,
265 				dimm_params_t *pdimm,
266 				unsigned int ctrl_num)
267 {
268 	int i;
269 	popts->clk_adjust = 6;
270 	popts->cpo_override = 0x1f;
271 	popts->write_data_delay = 2;
272 	popts->half_strength_driver_enable = 1;
273 	/* Write leveling override */
274 	popts->wrlvl_en = 1;
275 	popts->wrlvl_override = 1;
276 	popts->wrlvl_sample = 0xf;
277 	popts->wrlvl_start = 0x8;
278 	popts->trwt_override = 1;
279 	popts->trwt = 0;
280 
281 	if (pdimm->primary_sdram_width == 64)
282 		popts->data_bus_width = 0;
283 	else if (pdimm->primary_sdram_width == 32)
284 		popts->data_bus_width = 1;
285 	else
286 		printf("Error in DDR bus width configuration!\n");
287 
288 	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
289 		popts->cs_local_opts[i].odt_rd_cfg = FSL_DDR_ODT_NEVER;
290 		popts->cs_local_opts[i].odt_wr_cfg = FSL_DDR_ODT_CS;
291 	}
292 }
293