1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) Marvell International Ltd. and its affiliates
*/
#include "mv_ddr_spd.h"
#define MV_DDR_SPD_DATA_MTB 125 /* medium timebase, ps */
#define MV_DDR_SPD_DATA_FTB 1 /* fine timebase, ps */
#define MV_DDR_SPD_MSB_OFFS 8 /* most significant byte offset, bits */
#define MV_DDR_SPD_SUPPORTED_CLS_NUM 30
static unsigned int mv_ddr_spd_supported_cls[MV_DDR_SPD_SUPPORTED_CLS_NUM];
int mv_ddr_spd_supported_cls_calc(union mv_ddr_spd_data *spd_data)
{
unsigned int byte, bit, start_cl;
start_cl = (spd_data->all_bytes[23] & 0x8) ? 23 : 7;
for (byte = 20; byte < 23; byte++) {
for (bit = 0; bit < 8; bit++) {
if (spd_data->all_bytes[byte] & (1 << bit))
mv_ddr_spd_supported_cls[(byte - 20) * 8 + bit] = start_cl + (byte - 20) * 8 + bit;
else
mv_ddr_spd_supported_cls[(byte - 20) * 8 + bit] = 0;
}
}
for (byte = 23, bit = 0; bit < 6; bit++) {
if (spd_data->all_bytes[byte] & (1 << bit))
mv_ddr_spd_supported_cls[(byte - 20) * 8 + bit] = start_cl + (byte - 20) * 8 + bit;
else
mv_ddr_spd_supported_cls[(byte - 20) * 8 + bit] = 0;
}
return 0;
}
unsigned int mv_ddr_spd_supported_cl_get(unsigned int cl)
{
unsigned int supported_cl;
int i = 0;
while (i < MV_DDR_SPD_SUPPORTED_CLS_NUM &&
mv_ddr_spd_supported_cls[i] < cl)
i++;
if (i < MV_DDR_SPD_SUPPORTED_CLS_NUM)
supported_cl = mv_ddr_spd_supported_cls[i];
else
supported_cl = 0;
return supported_cl;
}
int mv_ddr_spd_timing_calc(union mv_ddr_spd_data *spd_data, unsigned int timing_data[])
{
int calc_val;
/* t ck avg min, ps */
calc_val = spd_data->byte_fields.byte_18 * MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_125 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TCK_AVG_MIN] = calc_val;
/* t aa min, ps */
calc_val = spd_data->byte_fields.byte_24 * MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_123 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TAA_MIN] = calc_val;
/* t rfc1 min, ps */
timing_data[MV_DDR_TRFC1_MIN] = (spd_data->byte_fields.byte_30 +
(spd_data->byte_fields.byte_31 << MV_DDR_SPD_MSB_OFFS)) * MV_DDR_SPD_DATA_MTB;
/* t wr min, ps */
timing_data[MV_DDR_TWR_MIN] = (spd_data->byte_fields.byte_42 +
(spd_data->byte_fields.byte_41.bit_fields.t_wr_min_msn << MV_DDR_SPD_MSB_OFFS)) *
MV_DDR_SPD_DATA_MTB;
/* t rcd min, ps */
calc_val = spd_data->byte_fields.byte_25 * MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_122 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TRCD_MIN] = calc_val;
/* t rp min, ps */
calc_val = spd_data->byte_fields.byte_26 * MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_121 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TRP_MIN] = calc_val;
/* t rc min, ps */
calc_val = (spd_data->byte_fields.byte_29 +
(spd_data->byte_fields.byte_27.bit_fields.t_rc_min_msn << MV_DDR_SPD_MSB_OFFS)) *
MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_120 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TRC_MIN] = calc_val;
/* t ras min, ps */
timing_data[MV_DDR_TRAS_MIN] = (spd_data->byte_fields.byte_28 +
(spd_data->byte_fields.byte_27.bit_fields.t_ras_min_msn << MV_DDR_SPD_MSB_OFFS)) *
MV_DDR_SPD_DATA_MTB;
/* t rrd s min, ps */
calc_val = spd_data->byte_fields.byte_38 * MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_119 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TRRD_S_MIN] = calc_val;
/* t rrd l min, ps */
calc_val = spd_data->byte_fields.byte_39 * MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_118 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TRRD_L_MIN] = calc_val;
/* t ccd l min, ps */
calc_val = spd_data->byte_fields.byte_40 * MV_DDR_SPD_DATA_MTB +
(signed char)spd_data->byte_fields.byte_117 * MV_DDR_SPD_DATA_FTB;
if (calc_val < 0)
return 1;
timing_data[MV_DDR_TCCD_L_MIN] = calc_val;
/* t faw min, ps */
timing_data[MV_DDR_TFAW_MIN] = (spd_data->byte_fields.byte_37 +
(spd_data->byte_fields.byte_36.bit_fields.t_faw_min_msn << MV_DDR_SPD_MSB_OFFS)) *
MV_DDR_SPD_DATA_MTB;
/* t wtr s min, ps */
timing_data[MV_DDR_TWTR_S_MIN] = (spd_data->byte_fields.byte_44 +
(spd_data->byte_fields.byte_43.bit_fields.t_wtr_s_min_msn << MV_DDR_SPD_MSB_OFFS)) *
MV_DDR_SPD_DATA_MTB;
/* t wtr l min, ps */
timing_data[MV_DDR_TWTR_L_MIN] = (spd_data->byte_fields.byte_45 +
(spd_data->byte_fields.byte_43.bit_fields.t_wtr_l_min_msn << MV_DDR_SPD_MSB_OFFS)) *
MV_DDR_SPD_DATA_MTB;
return 0;
}
enum mv_ddr_dev_width mv_ddr_spd_dev_width_get(union mv_ddr_spd_data *spd_data)
{
unsigned char dev_width = spd_data->byte_fields.byte_12.bit_fields.device_width;
enum mv_ddr_dev_width ret_val;
switch (dev_width) {
case 0x00:
ret_val = MV_DDR_DEV_WIDTH_4BIT;
break;
case 0x01:
ret_val = MV_DDR_DEV_WIDTH_8BIT;
break;
case 0x02:
ret_val = MV_DDR_DEV_WIDTH_16BIT;
break;
case 0x03:
ret_val = MV_DDR_DEV_WIDTH_32BIT;
break;
default:
ret_val = MV_DDR_DEV_WIDTH_LAST;
}
return ret_val;
}
enum mv_ddr_die_capacity mv_ddr_spd_die_capacity_get(union mv_ddr_spd_data *spd_data)
{
unsigned char die_cap = spd_data->byte_fields.byte_4.bit_fields.die_capacity;
enum mv_ddr_die_capacity ret_val;
switch (die_cap) {
case 0x00:
ret_val = MV_DDR_DIE_CAP_256MBIT;
break;
case 0x01:
ret_val = MV_DDR_DIE_CAP_512MBIT;
break;
case 0x02:
ret_val = MV_DDR_DIE_CAP_1GBIT;
break;
case 0x03:
ret_val = MV_DDR_DIE_CAP_2GBIT;
break;
case 0x04:
ret_val = MV_DDR_DIE_CAP_4GBIT;
break;
case 0x05:
ret_val = MV_DDR_DIE_CAP_8GBIT;
break;
case 0x06:
ret_val = MV_DDR_DIE_CAP_16GBIT;
break;
case 0x07:
ret_val = MV_DDR_DIE_CAP_32GBIT;
break;
case 0x08:
ret_val = MV_DDR_DIE_CAP_12GBIT;
break;
case 0x09:
ret_val = MV_DDR_DIE_CAP_24GBIT;
break;
default:
ret_val = MV_DDR_DIE_CAP_LAST;
}
return ret_val;
}
unsigned char mv_ddr_spd_mem_mirror_get(union mv_ddr_spd_data *spd_data)
{
unsigned char mem_mirror = spd_data->byte_fields.byte_131.bit_fields.rank_1_mapping;
return mem_mirror;
}
enum mv_ddr_pkg_rank mv_ddr_spd_pri_bus_width_get(union mv_ddr_spd_data *spd_data)
{
unsigned char pri_bus_width = spd_data->byte_fields.byte_13.bit_fields.primary_bus_width;
enum mv_ddr_pri_bus_width ret_val;
switch (pri_bus_width) {
case 0x00:
ret_val = MV_DDR_PRI_BUS_WIDTH_8;
break;
case 0x01:
ret_val = MV_DDR_PRI_BUS_WIDTH_16;
break;
case 0x02:
ret_val = MV_DDR_PRI_BUS_WIDTH_32;
break;
case 0x03:
ret_val = MV_DDR_PRI_BUS_WIDTH_64;
break;
default:
ret_val = MV_DDR_PRI_BUS_WIDTH_LAST;
}
return ret_val;
}
enum mv_ddr_pkg_rank mv_ddr_spd_bus_width_ext_get(union mv_ddr_spd_data *spd_data)
{
unsigned char bus_width_ext = spd_data->byte_fields.byte_13.bit_fields.bus_width_ext;
enum mv_ddr_bus_width_ext ret_val;
switch (bus_width_ext) {
case 0x00:
ret_val = MV_DDR_BUS_WIDTH_EXT_0;
break;
case 0x01:
ret_val = MV_DDR_BUS_WIDTH_EXT_8;
break;
default:
ret_val = MV_DDR_BUS_WIDTH_EXT_LAST;
}
return ret_val;
}
static enum mv_ddr_pkg_rank mv_ddr_spd_pkg_rank_get(union mv_ddr_spd_data *spd_data)
{
unsigned char pkg_rank = spd_data->byte_fields.byte_12.bit_fields.dimm_pkg_ranks_num;
enum mv_ddr_pkg_rank ret_val;
switch (pkg_rank) {
case 0x00:
ret_val = MV_DDR_PKG_RANK_1;
break;
case 0x01:
ret_val = MV_DDR_PKG_RANK_2;
break;
case 0x02:
ret_val = MV_DDR_PKG_RANK_3;
break;
case 0x03:
ret_val = MV_DDR_PKG_RANK_4;
break;
case 0x04:
ret_val = MV_DDR_PKG_RANK_5;
break;
case 0x05:
ret_val = MV_DDR_PKG_RANK_6;
break;
case 0x06:
ret_val = MV_DDR_PKG_RANK_7;
break;
case 0x07:
ret_val = MV_DDR_PKG_RANK_8;
break;
default:
ret_val = MV_DDR_PKG_RANK_LAST;
}
return ret_val;
}
static enum mv_ddr_die_count mv_ddr_spd_die_count_get(union mv_ddr_spd_data *spd_data)
{
unsigned char die_count = spd_data->byte_fields.byte_6.bit_fields.die_count;
enum mv_ddr_die_count ret_val;
switch (die_count) {
case 0x00:
ret_val = MV_DDR_DIE_CNT_1;
break;
case 0x01:
ret_val = MV_DDR_DIE_CNT_2;
break;
case 0x02:
ret_val = MV_DDR_DIE_CNT_3;
break;
case 0x03:
ret_val = MV_DDR_DIE_CNT_4;
break;
case 0x04:
ret_val = MV_DDR_DIE_CNT_5;
break;
case 0x05:
ret_val = MV_DDR_DIE_CNT_6;
break;
case 0x06:
ret_val = MV_DDR_DIE_CNT_7;
break;
case 0x07:
ret_val = MV_DDR_DIE_CNT_8;
break;
default:
ret_val = MV_DDR_DIE_CNT_LAST;
}
return ret_val;
}
unsigned char mv_ddr_spd_cs_bit_mask_get(union mv_ddr_spd_data *spd_data)
{
unsigned char cs_bit_mask = 0x0;
enum mv_ddr_pkg_rank pkg_rank = mv_ddr_spd_pkg_rank_get(spd_data);
enum mv_ddr_die_count die_cnt = mv_ddr_spd_die_count_get(spd_data);
if (pkg_rank == MV_DDR_PKG_RANK_1 && die_cnt == MV_DDR_DIE_CNT_1)
cs_bit_mask = 0x1;
else if (pkg_rank == MV_DDR_PKG_RANK_1 && die_cnt == MV_DDR_DIE_CNT_2)
cs_bit_mask = 0x3;
else if (pkg_rank == MV_DDR_PKG_RANK_2 && die_cnt == MV_DDR_DIE_CNT_1)
cs_bit_mask = 0x3;
else if (pkg_rank == MV_DDR_PKG_RANK_2 && die_cnt == MV_DDR_DIE_CNT_2)
cs_bit_mask = 0xf;
return cs_bit_mask;
}
unsigned char mv_ddr_spd_dev_type_get(union mv_ddr_spd_data *spd_data)
{
unsigned char dev_type = spd_data->byte_fields.byte_2;
return dev_type;
}
unsigned char mv_ddr_spd_module_type_get(union mv_ddr_spd_data *spd_data)
{
unsigned char module_type = spd_data->byte_fields.byte_3.bit_fields.module_type;
return module_type;
}
|
