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6#include <common.h>
7#include <cpu_func.h>
8#include <errno.h>
9#include <fdtdec.h>
10#include <init.h>
11#include <malloc.h>
12#include <asm/mrccache.h>
13#include <asm/mtrr.h>
14#include <asm/post.h>
15#include <asm/arch/mrc.h>
16#include <asm/arch/msg_port.h>
17#include <asm/arch/quark.h>
18
19DECLARE_GLOBAL_DATA_PTR;
20
21static __maybe_unused int prepare_mrc_cache(struct mrc_params *mrc_params)
22{
23 struct mrc_data_container *cache;
24 struct mrc_region entry;
25 int ret;
26
27 ret = mrccache_get_region(NULL, &entry);
28 if (ret)
29 return ret;
30
31 cache = mrccache_find_current(&entry);
32 if (!cache)
33 return -ENOENT;
34
35 debug("%s: mrc cache at %p, size %x checksum %04x\n", __func__,
36 cache->data, cache->data_size, cache->checksum);
37
38
39 memcpy(&mrc_params->timings, cache->data, cache->data_size);
40
41 return 0;
42}
43
44static int mrc_configure_params(struct mrc_params *mrc_params)
45{
46 const void *blob = gd->fdt_blob;
47 int node;
48 int mrc_flags;
49
50 node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_QRK_MRC);
51 if (node < 0) {
52 debug("%s: Cannot find MRC node\n", __func__);
53 return -EINVAL;
54 }
55
56#ifdef CONFIG_ENABLE_MRC_CACHE
57 mrc_params->boot_mode = prepare_mrc_cache(mrc_params);
58 if (mrc_params->boot_mode)
59 mrc_params->boot_mode = BM_COLD;
60 else
61 mrc_params->boot_mode = BM_FAST;
62#else
63 mrc_params->boot_mode = BM_COLD;
64#endif
65
66
67
68
69
70
71
72
73 mrc_params->ecc_enables = 0;
74
75 mrc_flags = fdtdec_get_int(blob, node, "flags", 0);
76 if (mrc_flags & MRC_FLAG_SCRAMBLE_EN)
77 mrc_params->scrambling_enables = 1;
78 else
79 mrc_params->scrambling_enables = 0;
80
81 mrc_params->dram_width = fdtdec_get_int(blob, node, "dram-width", 0);
82 mrc_params->ddr_speed = fdtdec_get_int(blob, node, "dram-speed", 0);
83 mrc_params->ddr_type = fdtdec_get_int(blob, node, "dram-type", 0);
84
85 mrc_params->rank_enables = fdtdec_get_int(blob, node, "rank-mask", 0);
86 mrc_params->channel_enables = fdtdec_get_int(blob, node,
87 "chan-mask", 0);
88 mrc_params->channel_width = fdtdec_get_int(blob, node,
89 "chan-width", 0);
90 mrc_params->address_mode = fdtdec_get_int(blob, node, "addr-mode", 0);
91
92 mrc_params->refresh_rate = fdtdec_get_int(blob, node,
93 "refresh-rate", 0);
94 mrc_params->sr_temp_range = fdtdec_get_int(blob, node,
95 "sr-temp-range", 0);
96 mrc_params->ron_value = fdtdec_get_int(blob, node,
97 "ron-value", 0);
98 mrc_params->rtt_nom_value = fdtdec_get_int(blob, node,
99 "rtt-nom-value", 0);
100 mrc_params->rd_odt_value = fdtdec_get_int(blob, node,
101 "rd-odt-value", 0);
102
103 mrc_params->params.density = fdtdec_get_int(blob, node,
104 "dram-density", 0);
105 mrc_params->params.cl = fdtdec_get_int(blob, node, "dram-cl", 0);
106 mrc_params->params.ras = fdtdec_get_int(blob, node, "dram-ras", 0);
107 mrc_params->params.wtr = fdtdec_get_int(blob, node, "dram-wtr", 0);
108 mrc_params->params.rrd = fdtdec_get_int(blob, node, "dram-rrd", 0);
109 mrc_params->params.faw = fdtdec_get_int(blob, node, "dram-faw", 0);
110
111 debug("MRC dram_width %d\n", mrc_params->dram_width);
112 debug("MRC rank_enables %d\n", mrc_params->rank_enables);
113 debug("MRC ddr_speed %d\n", mrc_params->ddr_speed);
114 debug("MRC flags: %s\n",
115 (mrc_params->scrambling_enables) ? "SCRAMBLE_EN" : "");
116
117 debug("MRC density=%d tCL=%d tRAS=%d tWTR=%d tRRD=%d tFAW=%d\n",
118 mrc_params->params.density, mrc_params->params.cl,
119 mrc_params->params.ras, mrc_params->params.wtr,
120 mrc_params->params.rrd, mrc_params->params.faw);
121
122 return 0;
123}
124
125int dram_init(void)
126{
127 struct mrc_params mrc_params;
128#ifdef CONFIG_ENABLE_MRC_CACHE
129 char *cache;
130#endif
131 int ret;
132
133 memset(&mrc_params, 0, sizeof(struct mrc_params));
134 ret = mrc_configure_params(&mrc_params);
135 if (ret)
136 return ret;
137
138
139 mrc_init(&mrc_params);
140 if (mrc_params.status)
141 return -EIO;
142
143 gd->ram_size = mrc_params.mem_size;
144 post_code(POST_DRAM);
145
146
147 disable_caches();
148 msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYBASE(MTRR_VAR_RAM),
149 0 | MTRR_TYPE_WRBACK);
150 msg_port_write(MSG_PORT_HOST_BRIDGE, MTRR_VAR_PHYMASK(MTRR_VAR_RAM),
151 (~(gd->ram_size - 1)) | MTRR_PHYS_MASK_VALID);
152 enable_caches();
153
154#ifdef CONFIG_ENABLE_MRC_CACHE
155 cache = malloc(sizeof(struct mrc_timings));
156 if (cache) {
157 memcpy(cache, &mrc_params.timings, sizeof(struct mrc_timings));
158 gd->arch.mrc_output = cache;
159 gd->arch.mrc_output_len = sizeof(struct mrc_timings);
160 }
161#endif
162
163 return 0;
164}
165
166int dram_init_banksize(void)
167{
168 gd->bd->bi_dram[0].start = 0;
169 gd->bd->bi_dram[0].size = gd->ram_size;
170
171 return 0;
172}
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181
182ulong board_get_usable_ram_top(ulong total_size)
183{
184 return gd->ram_size;
185}
186