1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
4 * Dave Gerlach <d-gerlach@ti.com>
5 */
6
7 #include <dm.h>
8 #include <soc.h>
9
10 #include <asm/arch/hardware.h>
11 #include <asm/io.h>
12
13 struct soc_ti_k3_plat {
14 const char *family;
15 const char *revision;
16 };
17
get_family_string(u32 idreg)18 static const char *get_family_string(u32 idreg)
19 {
20 const char *family;
21 u32 jtag_dev_id;
22 u32 pkg;
23 u32 soc;
24
25 jtag_dev_id = readl(CTRLMMR_WKUP_JTAG_DEVICE_ID);
26
27 soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
28
29 switch (soc) {
30 case JTAG_ID_PARTNO_AM62X:
31 family = "AM62X";
32 break;
33 case JTAG_ID_PARTNO_AM62AX:
34 family = "AM62AX";
35 break;
36 case JTAG_ID_PARTNO_AM62PX:
37 family = "AM62PX";
38 break;
39 case JTAG_ID_PARTNO_AM64X:
40 family = "AM64X";
41 break;
42 case JTAG_ID_PARTNO_AM65X:
43 family = "AM65X";
44 break;
45 case JTAG_ID_PARTNO_J7200:
46 family = "J7200";
47 break;
48 case JTAG_ID_PARTNO_J721E:
49 family = "J721E";
50 break;
51 case JTAG_ID_PARTNO_J721S2:
52 family = "J721S2";
53 break;
54 case JTAG_ID_PARTNO_J722S:
55 family = "J722S";
56 break;
57 case JTAG_ID_PARTNO_J784S4:
58 {
59 /* Keep default family as J784S4 */
60 family = "J784S4";
61
62 pkg = (jtag_dev_id & JTAG_DEV_J742S2_PKG_MASK) >> JTAG_DEV_J742S2_PKG_SHIFT;
63 if (pkg == JTAG_ID_PKG_J742S2)
64 family = "J742S2";
65
66 break;
67 }
68 default:
69 family = "Unknown Silicon";
70 };
71
72 return family;
73 }
74
75 static char *j721e_rev_string_map[] = {
76 "1.0", "1.1", "2.0",
77 };
78
79 static char *typical_rev_string_map[] = {
80 "1.0", "2.0", "3.0",
81 };
82
get_rev_string(u32 idreg)83 static const char *get_rev_string(u32 idreg)
84 {
85 u32 rev;
86 u32 soc;
87
88 rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
89 soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
90
91 switch (soc) {
92 case JTAG_ID_PARTNO_J721E:
93 if (rev >= ARRAY_SIZE(j721e_rev_string_map))
94 goto bail;
95 return j721e_rev_string_map[rev];
96
97 default:
98 if (rev >= ARRAY_SIZE(typical_rev_string_map))
99 goto bail;
100 return typical_rev_string_map[rev];
101 };
102
103 bail:
104 return "Unknown Revision";
105 }
106
soc_ti_k3_get_family(struct udevice * dev,char * buf,int size)107 static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
108 {
109 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
110
111 snprintf(buf, size, "%s", plat->family);
112
113 return 0;
114 }
115
soc_ti_k3_get_revision(struct udevice * dev,char * buf,int size)116 static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
117 {
118 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
119
120 snprintf(buf, size, "SR%s", plat->revision);
121
122 return 0;
123 }
124
125 static const struct soc_ops soc_ti_k3_ops = {
126 .get_family = soc_ti_k3_get_family,
127 .get_revision = soc_ti_k3_get_revision,
128 };
129
soc_ti_k3_probe(struct udevice * dev)130 int soc_ti_k3_probe(struct udevice *dev)
131 {
132 struct soc_ti_k3_plat *plat = dev_get_plat(dev);
133 u32 idreg;
134 void *idreg_addr;
135
136 idreg_addr = dev_read_addr_ptr(dev);
137 if (!idreg_addr)
138 return -EINVAL;
139
140 idreg = readl(idreg_addr);
141
142 plat->family = get_family_string(idreg);
143 plat->revision = get_rev_string(idreg);
144
145 return 0;
146 }
147
148 static const struct udevice_id soc_ti_k3_ids[] = {
149 { .compatible = "ti,am654-chipid" },
150 { }
151 };
152
153 U_BOOT_DRIVER(soc_ti_k3) = {
154 .name = "soc_ti_k3",
155 .id = UCLASS_SOC,
156 .ops = &soc_ti_k3_ops,
157 .of_match = soc_ti_k3_ids,
158 .probe = soc_ti_k3_probe,
159 .plat_auto = sizeof(struct soc_ti_k3_plat),
160 };
161