1 /*
2  * Copyright 2008-2014 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 #ifndef DDR2_DIMM_PARAMS_H
10 #define DDR2_DIMM_PARAMS_H
11 
12 #define EDC_DATA_PARITY	1
13 #define EDC_ECC		2
14 #define EDC_AC_PARITY	4
15 
16 /* Parameters for a DDR dimm computed from the SPD */
17 typedef struct dimm_params_s {
18 
19 	/* DIMM organization parameters */
20 	char mpart[19];		/* guaranteed null terminated */
21 
22 	unsigned int n_ranks;
23 	unsigned long long rank_density;
24 	unsigned long long capacity;
25 	unsigned int data_width;
26 	unsigned int primary_sdram_width;
27 	unsigned int ec_sdram_width;
28 	unsigned int registered_dimm;
29 	unsigned int device_width;	/* x4, x8, x16 components */
30 
31 	/* SDRAM device parameters */
32 	unsigned int n_row_addr;
33 	unsigned int n_col_addr;
34 	unsigned int edc_config;	/* 0 = none, 1 = parity, 2 = ECC */
35 #ifdef CONFIG_SYS_FSL_DDR4
36 	unsigned int bank_addr_bits;
37 	unsigned int bank_group_bits;
38 #else
39 	unsigned int n_banks_per_sdram_device;
40 #endif
41 	unsigned int burst_lengths_bitmask;	/* BL=4 bit 2, BL=8 = bit 3 */
42 	unsigned int row_density;
43 
44 	/* used in computing base address of DIMMs */
45 	unsigned long long base_address;
46 	/* mirrored DIMMs */
47 	unsigned int mirrored_dimm;	/* only for ddr3 */
48 
49 	/* DIMM timing parameters */
50 
51 	int mtb_ps;	/* medium timebase ps */
52 	int ftb_10th_ps; /* fine timebase, in 1/10 ps */
53 	int taa_ps;	/* minimum CAS latency time */
54 	int tfaw_ps;	/* four active window delay */
55 
56 	/*
57 	 * SDRAM clock periods
58 	 * The range for these are 1000-10000 so a short should be sufficient
59 	 */
60 	int tckmin_x_ps;
61 	int tckmin_x_minus_1_ps;
62 	int tckmin_x_minus_2_ps;
63 	int tckmax_ps;
64 
65 	/* SPD-defined CAS latencies */
66 	unsigned int caslat_x;
67 	unsigned int caslat_x_minus_1;
68 	unsigned int caslat_x_minus_2;
69 
70 	unsigned int caslat_lowest_derated;	/* Derated CAS latency */
71 
72 	/* basic timing parameters */
73 	int trcd_ps;
74 	int trp_ps;
75 	int tras_ps;
76 
77 #ifdef CONFIG_SYS_FSL_DDR4
78 	int trfc1_ps;
79 	int trfc2_ps;
80 	int trfc4_ps;
81 	int trrds_ps;
82 	int trrdl_ps;
83 	int tccdl_ps;
84 #else
85 	int twr_ps;	/* maximum = 63750 ps */
86 	int trfc_ps;	/* max = 255 ns + 256 ns + .75 ns
87 				       = 511750 ps */
88 	int trrd_ps;	/* maximum = 63750 ps */
89 	int twtr_ps;	/* maximum = 63750 ps */
90 	int trtp_ps;	/* byte 38, spd->trtp */
91 #endif
92 
93 	int trc_ps;	/* maximum = 254 ns + .75 ns = 254750 ps */
94 
95 	int refresh_rate_ps;
96 	int extended_op_srt;
97 
98 #if defined(CONFIG_SYS_FSL_DDR1) || defined(CONFIG_SYS_FSL_DDR2)
99 	int tis_ps;	/* byte 32, spd->ca_setup */
100 	int tih_ps;	/* byte 33, spd->ca_hold */
101 	int tds_ps;	/* byte 34, spd->data_setup */
102 	int tdh_ps;	/* byte 35, spd->data_hold */
103 	int tdqsq_max_ps;	/* byte 44, spd->tdqsq */
104 	int tqhs_ps;	/* byte 45, spd->tqhs */
105 #endif
106 
107 	/* DDR3 RDIMM */
108 	unsigned char rcw[16];	/* Register Control Word 0-15 */
109 #ifdef CONFIG_SYS_FSL_DDR4
110 	unsigned int dq_mapping[18];
111 	unsigned int dq_mapping_ors;
112 #endif
113 } dimm_params_t;
114 
115 extern unsigned int ddr_compute_dimm_parameters(
116 					 const generic_spd_eeprom_t *spd,
117 					 dimm_params_t *pdimm,
118 					 unsigned int dimm_number);
119 
120 #endif
121