1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
4 * Scott McNutt <smcnutt@psyent.com>
5 */
6
7 #include <command.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <misc.h>
11 #include <linux/time.h>
12 #include <asm/io.h>
13
14 struct altera_sysid_regs {
15 u32 id; /* The system build id */
16 u32 timestamp; /* Timestamp */
17 };
18
19 struct altera_sysid_plat {
20 struct altera_sysid_regs *regs;
21 };
22
display_sysid(void)23 void display_sysid(void)
24 {
25 struct udevice *dev;
26 u32 sysid[2];
27 struct tm t;
28 char asc[32];
29 time_t stamp;
30 int ret;
31
32 /* the first misc device will be used */
33 ret = uclass_first_device_err(UCLASS_MISC, &dev);
34 if (ret)
35 return;
36 ret = misc_read(dev, 0, &sysid, sizeof(sysid));
37 if (ret < 0)
38 return;
39
40 stamp = sysid[1];
41 localtime_r(&stamp, &t);
42 asctime_r(&t, asc);
43 printf("SYSID: %08x, %s", sysid[0], asc);
44 }
45
do_sysid(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])46 int do_sysid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
47 {
48 display_sysid();
49 return 0;
50 }
51
52 U_BOOT_CMD(
53 sysid, 1, 1, do_sysid,
54 "display Nios-II system id",
55 ""
56 );
57
altera_sysid_read(struct udevice * dev,int offset,void * buf,int size)58 static int altera_sysid_read(struct udevice *dev,
59 int offset, void *buf, int size)
60 {
61 struct altera_sysid_plat *plat = dev_get_plat(dev);
62 struct altera_sysid_regs *const regs = plat->regs;
63 u32 *sysid = buf;
64
65 sysid[0] = readl(®s->id);
66 sysid[1] = readl(®s->timestamp);
67
68 return 0;
69 }
70
altera_sysid_of_to_plat(struct udevice * dev)71 static int altera_sysid_of_to_plat(struct udevice *dev)
72 {
73 struct altera_sysid_plat *plat = dev_get_plat(dev);
74
75 plat->regs = map_physmem(dev_read_addr(dev),
76 sizeof(struct altera_sysid_regs),
77 MAP_NOCACHE);
78
79 return 0;
80 }
81
82 static const struct misc_ops altera_sysid_ops = {
83 .read = altera_sysid_read,
84 };
85
86 static const struct udevice_id altera_sysid_ids[] = {
87 { .compatible = "altr,sysid-1.0" },
88 {}
89 };
90
91 U_BOOT_DRIVER(altera_sysid) = {
92 .name = "altera_sysid",
93 .id = UCLASS_MISC,
94 .of_match = altera_sysid_ids,
95 .of_to_plat = altera_sysid_of_to_plat,
96 .plat_auto = sizeof(struct altera_sysid_plat),
97 .ops = &altera_sysid_ops,
98 };
99