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1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) Marvell International Ltd. and its affiliates
4  */
5 
6 #include "mv_ddr_topology.h"
7 #include "mv_ddr_common.h"
8 #include "mv_ddr_spd.h"
9 #include "ddr3_init.h"
10 #include "ddr_topology_def.h"
11 #include "ddr3_training_ip_db.h"
12 #include "ddr3_training_ip.h"
13 
14 
mv_ddr_cl_calc(unsigned int taa_min,unsigned int tclk)15 unsigned int mv_ddr_cl_calc(unsigned int taa_min, unsigned int tclk)
16 {
17 	unsigned int cl = ceil_div(taa_min, tclk);
18 
19 	return mv_ddr_spd_supported_cl_get(cl);
20 
21 }
22 
mv_ddr_cwl_calc(unsigned int tclk)23 unsigned int mv_ddr_cwl_calc(unsigned int tclk)
24 {
25 	unsigned int cwl;
26 
27 	if (tclk >= 1250)
28 		cwl = 9;
29 	else if (tclk >= 1071)
30 		cwl = 10;
31 	else if (tclk >= 938)
32 		cwl = 11;
33 	else if (tclk >= 833)
34 		cwl = 12;
35 	else
36 		cwl = 0;
37 
38 	return cwl;
39 }
40 
mv_ddr_topology_map_update(void)41 struct mv_ddr_topology_map *mv_ddr_topology_map_update(void)
42 {
43 	struct mv_ddr_topology_map *tm = mv_ddr_topology_map_get();
44 	unsigned int octets_per_if_num = ddr3_tip_dev_attr_get(0, MV_ATTR_OCTET_PER_INTERFACE);
45 	enum hws_speed_bin speed_bin_index;
46 	enum hws_ddr_freq freq = DDR_FREQ_LAST;
47 	unsigned int tclk;
48 	unsigned char val = 0;
49 	int i;
50 
51 
52 	if (tm->interface_params[0].memory_freq == DDR_FREQ_SAR)
53 		tm->interface_params[0].memory_freq = mv_ddr_init_freq_get();
54 
55 	if (tm->cfg_src == MV_DDR_CFG_SPD) {
56 		/* check dram device type */
57 		val = mv_ddr_spd_dev_type_get(&tm->spd_data);
58 		if (val != MV_DDR_SPD_DEV_TYPE_DDR4) {
59 			printf("mv_ddr: unsupported dram device type found\n");
60 			return NULL;
61 		}
62 
63 		/* update topology map with timing data */
64 		if (mv_ddr_spd_timing_calc(&tm->spd_data, tm->timing_data) > 0) {
65 			printf("mv_ddr: negative timing data found\n");
66 			return NULL;
67 		}
68 
69 		/* update device width in topology map */
70 		tm->interface_params[0].bus_width = mv_ddr_spd_dev_width_get(&tm->spd_data);
71 
72 		/* update die capacity in topology map */
73 		tm->interface_params[0].memory_size = mv_ddr_spd_die_capacity_get(&tm->spd_data);
74 
75 		/* update bus bit mask in topology map */
76 		tm->bus_act_mask = mv_ddr_bus_bit_mask_get();
77 
78 		/* update cs bit mask in topology map */
79 		val = mv_ddr_spd_cs_bit_mask_get(&tm->spd_data);
80 		for (i = 0; i < octets_per_if_num; i++) {
81 				tm->interface_params[0].as_bus_params[i].cs_bitmask = val;
82 		}
83 
84 		/* check dram module type */
85 		val = mv_ddr_spd_module_type_get(&tm->spd_data);
86 		switch (val) {
87 		case MV_DDR_SPD_MODULE_TYPE_UDIMM:
88 		case MV_DDR_SPD_MODULE_TYPE_SO_DIMM:
89 		case MV_DDR_SPD_MODULE_TYPE_MINI_UDIMM:
90 		case MV_DDR_SPD_MODULE_TYPE_72BIT_SO_UDIMM:
91 		case MV_DDR_SPD_MODULE_TYPE_16BIT_SO_DIMM:
92 		case MV_DDR_SPD_MODULE_TYPE_32BIT_SO_DIMM:
93 			break;
94 		default:
95 			printf("mv_ddr: unsupported dram module type found\n");
96 			return NULL;
97 		}
98 
99 		/* update mirror bit mask in topology map */
100 		val = mv_ddr_spd_mem_mirror_get(&tm->spd_data);
101 		for (i = 0; i < octets_per_if_num; i++) {
102 				tm->interface_params[0].as_bus_params[i].mirror_enable_bitmask = val << 1;
103 		}
104 
105 		tclk = 1000000 / freq_val[tm->interface_params[0].memory_freq];
106 		/* update cas write latency (cwl) */
107 		val = mv_ddr_cwl_calc(tclk);
108 		if (val == 0) {
109 			printf("mv_ddr: unsupported cas write latency value found\n");
110 			return NULL;
111 		}
112 		tm->interface_params[0].cas_wl = val;
113 
114 		/* update cas latency (cl) */
115 		mv_ddr_spd_supported_cls_calc(&tm->spd_data);
116 		val = mv_ddr_cl_calc(tm->timing_data[MV_DDR_TAA_MIN], tclk);
117 		if (val == 0) {
118 			printf("mv_ddr: unsupported cas latency value found\n");
119 			return NULL;
120 		}
121 		tm->interface_params[0].cas_l = val;
122 	} else if (tm->cfg_src == MV_DDR_CFG_DEFAULT) {
123 		/* set cas and cas-write latencies per speed bin, if they unset */
124 		speed_bin_index = tm->interface_params[0].speed_bin_index;
125 		freq = tm->interface_params[0].memory_freq;
126 
127 		if (tm->interface_params[0].cas_l == 0)
128 			tm->interface_params[0].cas_l =
129 				cas_latency_table[speed_bin_index].cl_val[freq];
130 
131 		if (tm->interface_params[0].cas_wl == 0)
132 			tm->interface_params[0].cas_wl =
133 				cas_write_latency_table[speed_bin_index].cl_val[freq];
134 	}
135 
136 
137 	return tm;
138 }
139 
mv_ddr_bus_bit_mask_get(void)140 unsigned short mv_ddr_bus_bit_mask_get(void)
141 {
142 	unsigned short pri_and_ext_bus_width = 0x0;
143 	struct mv_ddr_topology_map *tm = mv_ddr_topology_map_get();
144 	unsigned int octets_per_if_num = ddr3_tip_dev_attr_get(0, MV_ATTR_OCTET_PER_INTERFACE);
145 
146 	if (tm->cfg_src == MV_DDR_CFG_SPD) {
147 		enum mv_ddr_pri_bus_width pri_bus_width = mv_ddr_spd_pri_bus_width_get(&tm->spd_data);
148 		enum mv_ddr_bus_width_ext bus_width_ext = mv_ddr_spd_bus_width_ext_get(&tm->spd_data);
149 
150 		switch (pri_bus_width) {
151 		case MV_DDR_PRI_BUS_WIDTH_16:
152 			pri_and_ext_bus_width = BUS_MASK_16BIT;
153 			break;
154 		case MV_DDR_PRI_BUS_WIDTH_32:
155 			pri_and_ext_bus_width = BUS_MASK_32BIT;
156 			break;
157 		case MV_DDR_PRI_BUS_WIDTH_64:
158 			pri_and_ext_bus_width = MV_DDR_64BIT_BUS_MASK;
159 			break;
160 		default:
161 			pri_and_ext_bus_width = 0x0;
162 		}
163 
164 		if (bus_width_ext == MV_DDR_BUS_WIDTH_EXT_8)
165 			pri_and_ext_bus_width |= 1 << (octets_per_if_num - 1);
166 	}
167 
168 	return pri_and_ext_bus_width;
169 }
170 
mv_ddr_if_bus_width_get(void)171 unsigned int mv_ddr_if_bus_width_get(void)
172 {
173 	struct mv_ddr_topology_map *tm = mv_ddr_topology_map_get();
174 	unsigned int bus_width;
175 
176 	switch (tm->bus_act_mask) {
177 	case BUS_MASK_16BIT:
178 	case BUS_MASK_16BIT_ECC:
179 	case BUS_MASK_16BIT_ECC_PUP3:
180 		bus_width = 16;
181 		break;
182 	case BUS_MASK_32BIT:
183 	case BUS_MASK_32BIT_ECC:
184 	case MV_DDR_32BIT_ECC_PUP8_BUS_MASK:
185 		bus_width = 32;
186 		break;
187 	case MV_DDR_64BIT_BUS_MASK:
188 	case MV_DDR_64BIT_ECC_PUP8_BUS_MASK:
189 		bus_width = 64;
190 		break;
191 	default:
192 		printf("mv_ddr: unsupported bus active mask parameter found\n");
193 		bus_width = 0;
194 	}
195 
196 	return bus_width;
197 }
198