1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
4 * Dave Gerlach <d-gerlach@ti.com>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <soc.h>
10
11 #include <asm/arch/hardware.h>
12 #include <asm/io.h>
13
14 struct soc_ti_k3_plat {
15 const char *family;
16 const char *revision;
17 };
18
get_family_string(u32 idreg)19 static const char *get_family_string(u32 idreg)
20 {
21 const char *family;
22 u32 soc;
23
24 soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
25
26 switch (soc) {
27 case JTAG_ID_PARTNO_AM65X:
28 family = "AM65X";
29 break;
30 case JTAG_ID_PARTNO_J721E:
31 family = "J721E";
32 break;
33 case JTAG_ID_PARTNO_J7200:
34 family = "J7200";
35 break;
36 case JTAG_ID_PARTNO_AM64X:
37 family = "AM64X";
38 break;
39 case JTAG_ID_PARTNO_J721S2:
40 family = "J721S2";
41 break;
42 case JTAG_ID_PARTNO_AM62X:
43 family = "AM62X";
44 break;
45 case JTAG_ID_PARTNO_AM62AX:
46 family = "AM62AX";
47 break;
48 default:
49 family = "Unknown Silicon";
50 };
51
52 return family;
53 }
54
55 static char *j721e_rev_string_map[] = {
56 "1.0", "1.1",
57 };
58
59 static char *typical_rev_string_map[] = {
60 "1.0", "2.0", "3.0",
61 };
62
get_rev_string(u32 idreg)63 static const char *get_rev_string(u32 idreg)
64 {
65 u32 rev;
66 u32 soc;
67
68 rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
69 soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
70
71 switch (soc) {
72 case JTAG_ID_PARTNO_J721E:
73 if (rev >= ARRAY_SIZE(j721e_rev_string_map))
74 goto bail;
75 return j721e_rev_string_map[rev];
76
77 default:
78 if (rev >= ARRAY_SIZE(typical_rev_string_map))
79 goto bail;
80 return typical_rev_string_map[rev];
81 };
82
83 bail:
84 return "Unknown Revision";
85 }
86
soc_ti_k3_get_family(struct udevice * dev,char * buf,int size)87 static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
88 {
89 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
90
91 snprintf(buf, size, "%s", plat->family);
92
93 return 0;
94 }
95
soc_ti_k3_get_revision(struct udevice * dev,char * buf,int size)96 static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
97 {
98 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
99
100 snprintf(buf, size, "SR%s", plat->revision);
101
102 return 0;
103 }
104
105 static const struct soc_ops soc_ti_k3_ops = {
106 .get_family = soc_ti_k3_get_family,
107 .get_revision = soc_ti_k3_get_revision,
108 };
109
soc_ti_k3_probe(struct udevice * dev)110 int soc_ti_k3_probe(struct udevice *dev)
111 {
112 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
113 u32 idreg;
114 void *idreg_addr;
115
116 idreg_addr = dev_read_addr_ptr(dev);
117 if (!idreg_addr)
118 return -EINVAL;
119
120 idreg = readl(idreg_addr);
121
122 plat->family = get_family_string(idreg);
123 plat->revision = get_rev_string(idreg);
124
125 return 0;
126 }
127
128 static const struct udevice_id soc_ti_k3_ids[] = {
129 { .compatible = "ti,am654-chipid" },
130 { }
131 };
132
133 U_BOOT_DRIVER(soc_ti_k3) = {
134 .name = "soc_ti_k3",
135 .id = UCLASS_SOC,
136 .ops = &soc_ti_k3_ops,
137 .of_match = soc_ti_k3_ids,
138 .probe = soc_ti_k3_probe,
139 .plat_auto = sizeof(struct soc_ti_k3_plat),
140 };
141