1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2019 Julien Masson <jmasson@baylibre.com>
4  * (C) Copyright 2019 Neil Armstrong <narmstrong@baylibre.com>
5  */
6 
7 #include <common.h>
8 #include <init.h>
9 #include <asm/global_data.h>
10 #include <asm/io.h>
11 #include <dm.h>
12 #include <linux/bitfield.h>
13 #include <regmap.h>
14 #include <syscon.h>
15 #include <linux/bitops.h>
16 #include <linux/err.h>
17 
18 #define AO_SEC_SD_CFG8		0xe0
19 #define AO_SEC_SOCINFO_OFFSET	AO_SEC_SD_CFG8
20 
21 #define SOCINFO_MAJOR	GENMASK(31, 24)
22 #define SOCINFO_PACK	GENMASK(23, 16)
23 #define SOCINFO_MINOR	GENMASK(15, 8)
24 #define SOCINFO_MISC	GENMASK(7, 0)
25 
26 static const struct meson_gx_soc_id {
27 	const char *name;
28 	unsigned int id;
29 } soc_ids[] = {
30 	{ "GXBB",   0x1f },
31 	{ "GXTVBB", 0x20 },
32 	{ "GXL",    0x21 },
33 	{ "GXM",    0x22 },
34 	{ "TXL",    0x23 },
35 	{ "TXLX",   0x24 },
36 	{ "AXG",    0x25 },
37 	{ "GXLX",   0x26 },
38 	{ "TXHD",   0x27 },
39 	{ "G12A",   0x28 },
40 	{ "G12B",   0x29 },
41 	{ "SM1",    0x2b },
42 	{ "A1",	    0x2c },
43 };
44 
45 static const struct meson_gx_package_id {
46 	const char *name;
47 	unsigned int major_id;
48 	unsigned int pack_id;
49 	unsigned int pack_mask;
50 } soc_packages[] = {
51 	{ "S905",   0x1f, 0,    0x20 }, /* pack_id != 0x20 */
52 	{ "S905H",  0x1f, 0x3,  0xf },  /* pack_id & 0xf == 0x3 */
53 	{ "S905M",  0x1f, 0x20, 0xf0 }, /* pack_id == 0x20 */
54 	{ "S905D",  0x21, 0,    0xf0 },
55 	{ "S905X",  0x21, 0x80, 0xf0 },
56 	{ "S905W",  0x21, 0xa0, 0xf0 },
57 	{ "S905L",  0x21, 0xc0, 0xf0 },
58 	{ "S905M2", 0x21, 0xe0, 0xf0 },
59 	{ "S805X",  0x21, 0x30, 0xf0 },
60 	{ "S805Y",  0x21, 0xb0, 0xf0 },
61 	{ "S912",   0x22, 0,    0x0 },  /* Only S912 is known for GXM */
62 	{ "962X",   0x24, 0x10, 0xf0 },
63 	{ "962E",   0x24, 0x20, 0xf0 },
64 	{ "A113X",  0x25, 0x37, 0xff },
65 	{ "A113D",  0x25, 0x22, 0xff },
66 	{ "S905D2", 0x28, 0x10, 0xf0 },
67 	{ "S905Y2", 0x28, 0x30, 0xf0 },
68 	{ "S905X2", 0x28, 0x40, 0xf0 },
69 	{ "A311D",  0x29, 0x10, 0xf0 },
70 	{ "S922X",  0x29, 0x40, 0xf0 },
71 	{ "S905D3", 0x2b, 0x4, 0xf5 },
72 	{ "S905X3", 0x2b, 0x5, 0xf5 },
73 	{ "S905X3", 0x2b, 0x10, 0x3f },
74 	{ "S905D3", 0x2b, 0x30, 0x3f },
75 	{ "A113L", 0x2c, 0x0, 0xf8 },
76 };
77 
78 DECLARE_GLOBAL_DATA_PTR;
79 
socinfo_to_major(u32 socinfo)80 static inline unsigned int socinfo_to_major(u32 socinfo)
81 {
82 	return FIELD_GET(SOCINFO_MAJOR, socinfo);
83 }
84 
socinfo_to_minor(u32 socinfo)85 static inline unsigned int socinfo_to_minor(u32 socinfo)
86 {
87 	return FIELD_GET(SOCINFO_MINOR, socinfo);
88 }
89 
socinfo_to_pack(u32 socinfo)90 static inline unsigned int socinfo_to_pack(u32 socinfo)
91 {
92 	return FIELD_GET(SOCINFO_PACK, socinfo);
93 }
94 
socinfo_to_misc(u32 socinfo)95 static inline unsigned int socinfo_to_misc(u32 socinfo)
96 {
97 	return FIELD_GET(SOCINFO_MISC, socinfo);
98 }
99 
socinfo_to_package_id(u32 socinfo)100 static const char *socinfo_to_package_id(u32 socinfo)
101 {
102 	unsigned int pack = socinfo_to_pack(socinfo);
103 	unsigned int major = socinfo_to_major(socinfo);
104 	int i;
105 
106 	for (i = 0 ; i < ARRAY_SIZE(soc_packages) ; ++i) {
107 		if (soc_packages[i].major_id == major &&
108 		    soc_packages[i].pack_id ==
109 		    (pack & soc_packages[i].pack_mask))
110 			return soc_packages[i].name;
111 	}
112 
113 	return "Unknown";
114 }
115 
socinfo_to_soc_id(u32 socinfo)116 static const char *socinfo_to_soc_id(u32 socinfo)
117 {
118 	unsigned int id = socinfo_to_major(socinfo);
119 	int i;
120 
121 	for (i = 0 ; i < ARRAY_SIZE(soc_ids) ; ++i) {
122 		if (soc_ids[i].id == id)
123 			return soc_ids[i].name;
124 	}
125 
126 	return "Unknown";
127 }
128 
print_board_model(void)129 static void print_board_model(void)
130 {
131 	const char *model;
132 	model = fdt_getprop(gd->fdt_blob, 0, "model", NULL);
133 	printf("Model: %s\n", model ? model : "Unknown");
134 }
135 
get_socinfo(void)136 static unsigned int get_socinfo(void)
137 {
138 	struct regmap *regmap;
139 	int nodeoffset, ret;
140 	ofnode node;
141 	unsigned int socinfo;
142 
143 	/* find the offset of compatible node */
144 	nodeoffset = fdt_node_offset_by_compatible(gd->fdt_blob, -1,
145 						   "amlogic,meson-gx-ao-secure");
146 	if (nodeoffset < 0)
147 		return 0;
148 
149 	/* check if chip-id is available */
150 	if (!fdt_getprop(gd->fdt_blob, nodeoffset, "amlogic,has-chip-id", NULL))
151 		return 0;
152 
153 	/* get regmap from the syscon node */
154 	node = offset_to_ofnode(nodeoffset);
155 	regmap = syscon_node_to_regmap(node);
156 	if (IS_ERR(regmap)) {
157 		printf("%s: failed to get regmap\n", __func__);
158 		return 0;
159 	}
160 
161 	/* read soc info */
162 	ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo);
163 	if (ret && !socinfo) {
164 		printf("%s: invalid chipid value\n", __func__);
165 		return 0;
166 	}
167 
168 	return socinfo;
169 }
170 
show_board_info(void)171 int show_board_info(void)
172 {
173 	unsigned int socinfo;
174 
175 	/* print board information */
176 	print_board_model();
177 
178 	socinfo = get_socinfo();
179 	if (!socinfo)
180 		return 0;
181 
182 	printf("SoC:   Amlogic Meson %s (%s) Revision %x:%x (%x:%x)\n",
183 	       socinfo_to_soc_id(socinfo),
184 	       socinfo_to_package_id(socinfo),
185 	       socinfo_to_major(socinfo),
186 	       socinfo_to_minor(socinfo),
187 	       socinfo_to_pack(socinfo),
188 	       socinfo_to_misc(socinfo));
189 
190 	return 0;
191 }
192 
meson_get_soc_rev(char * buff,size_t buff_len)193 int meson_get_soc_rev(char *buff, size_t buff_len)
194 {
195 	unsigned int socinfo;
196 
197 	socinfo = get_socinfo();
198 	if (!socinfo)
199 		return -1;
200 
201 	/* Write SoC info */
202 	return snprintf(buff, buff_len, "%x", socinfo_to_minor(socinfo));
203 }
204