1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * DDR addressing details and AC timing parameters from JEDEC specs
4  *
5  * Copyright (C) 2012 Texas Instruments, Inc.
6  *
7  * Aneesh V <aneesh@ti.com>
8  */
9 
10 #include <linux/export.h>
11 
12 #include "jedec_ddr.h"
13 
14 /* LPDDR2 addressing details from JESD209-2 section 2.4 */
15 const struct lpddr2_addressing
16 	lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = {
17 	{B4, T_REFI_15_6, T_RFC_90}, /* 64M */
18 	{B4, T_REFI_15_6, T_RFC_90}, /* 128M */
19 	{B4, T_REFI_7_8,  T_RFC_90}, /* 256M */
20 	{B4, T_REFI_7_8,  T_RFC_90}, /* 512M */
21 	{B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */
22 	{B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */
23 	{B8, T_REFI_3_9, T_RFC_130}, /* 4G */
24 	{B8, T_REFI_3_9, T_RFC_210}, /* 8G */
25 	{B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */
26 	{B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */
27 };
28 EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table);
29 
30 /* LPDDR2 AC timing parameters from JESD209-2 section 12 */
31 const struct lpddr2_timings
32 	lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES] = {
33 	/* Speed bin 400(200 MHz) */
34 	[0] = {
35 		.max_freq	= 200000000,
36 		.min_freq	= 10000000,
37 		.tRPab		= 21000,
38 		.tRCD		= 18000,
39 		.tWR		= 15000,
40 		.tRAS_min	= 42000,
41 		.tRRD		= 10000,
42 		.tWTR		= 10000,
43 		.tXP		= 7500,
44 		.tRTP		= 7500,
45 		.tCKESR		= 15000,
46 		.tDQSCK_max	= 5500,
47 		.tFAW		= 50000,
48 		.tZQCS		= 90000,
49 		.tZQCL		= 360000,
50 		.tZQinit	= 1000000,
51 		.tRAS_max_ns	= 70000,
52 		.tDQSCK_max_derated = 6000,
53 	},
54 	/* Speed bin 533(266 MHz) */
55 	[1] = {
56 		.max_freq	= 266666666,
57 		.min_freq	= 10000000,
58 		.tRPab		= 21000,
59 		.tRCD		= 18000,
60 		.tWR		= 15000,
61 		.tRAS_min	= 42000,
62 		.tRRD		= 10000,
63 		.tWTR		= 7500,
64 		.tXP		= 7500,
65 		.tRTP		= 7500,
66 		.tCKESR		= 15000,
67 		.tDQSCK_max	= 5500,
68 		.tFAW		= 50000,
69 		.tZQCS		= 90000,
70 		.tZQCL		= 360000,
71 		.tZQinit	= 1000000,
72 		.tRAS_max_ns	= 70000,
73 		.tDQSCK_max_derated = 6000,
74 	},
75 	/* Speed bin 800(400 MHz) */
76 	[2] = {
77 		.max_freq	= 400000000,
78 		.min_freq	= 10000000,
79 		.tRPab		= 21000,
80 		.tRCD		= 18000,
81 		.tWR		= 15000,
82 		.tRAS_min	= 42000,
83 		.tRRD		= 10000,
84 		.tWTR		= 7500,
85 		.tXP		= 7500,
86 		.tRTP		= 7500,
87 		.tCKESR		= 15000,
88 		.tDQSCK_max	= 5500,
89 		.tFAW		= 50000,
90 		.tZQCS		= 90000,
91 		.tZQCL		= 360000,
92 		.tZQinit	= 1000000,
93 		.tRAS_max_ns	= 70000,
94 		.tDQSCK_max_derated = 6000,
95 	},
96 	/* Speed bin 1066(533 MHz) */
97 	[3] = {
98 		.max_freq	= 533333333,
99 		.min_freq	= 10000000,
100 		.tRPab		= 21000,
101 		.tRCD		= 18000,
102 		.tWR		= 15000,
103 		.tRAS_min	= 42000,
104 		.tRRD		= 10000,
105 		.tWTR		= 7500,
106 		.tXP		= 7500,
107 		.tRTP		= 7500,
108 		.tCKESR		= 15000,
109 		.tDQSCK_max	= 5500,
110 		.tFAW		= 50000,
111 		.tZQCS		= 90000,
112 		.tZQCL		= 360000,
113 		.tZQinit	= 1000000,
114 		.tRAS_max_ns	= 70000,
115 		.tDQSCK_max_derated = 5620,
116 	},
117 };
118 EXPORT_SYMBOL_GPL(lpddr2_jedec_timings);
119 
120 const struct lpddr2_min_tck lpddr2_jedec_min_tck = {
121 	.tRPab		= 3,
122 	.tRCD		= 3,
123 	.tWR		= 3,
124 	.tRASmin	= 3,
125 	.tRRD		= 2,
126 	.tWTR		= 2,
127 	.tXP		= 2,
128 	.tRTP		= 2,
129 	.tCKE		= 3,
130 	.tCKESR		= 3,
131 	.tFAW		= 8
132 };
133 EXPORT_SYMBOL_GPL(lpddr2_jedec_min_tck);
134